diff --git a/usrsctplib/netinet/sctp_output.c b/usrsctplib/netinet/sctp_output.c
new file mode 100755
index 0000000..dc4b908
--- /dev/null
+++ b/usrsctplib/netinet/sctp_output.c
@@ -0,0 +1,15009 @@
+/*-
+ * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
+ * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * b) Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the distribution.
+ *
+ * c) Neither the name of Cisco Systems, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef __FreeBSD__
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: head/sys/netinet/sctp_output.c 310642 2016-12-27 22:14:41Z tuexen $");
+#endif
+
+#include <netinet/sctp_os.h>
+#ifdef __FreeBSD__
+#include <sys/proc.h>
+#endif
+#include <netinet/sctp_var.h>
+#include <netinet/sctp_sysctl.h>
+#include <netinet/sctp_header.h>
+#include <netinet/sctp_pcb.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_output.h>
+#include <netinet/sctp_uio.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_auth.h>
+#include <netinet/sctp_timer.h>
+#include <netinet/sctp_asconf.h>
+#include <netinet/sctp_indata.h>
+#include <netinet/sctp_bsd_addr.h>
+#include <netinet/sctp_input.h>
+#include <netinet/sctp_crc32.h>
+#if defined(__Userspace_os_Linux)
+#define __FAVOR_BSD    /* (on Ubuntu at least) enables UDP header field names like BSD in RFC 768 */
+#endif
+#if defined(INET) || defined(INET6)
+#if !defined(__Userspace_os_Windows)
+#include <netinet/udp.h>
+#endif
+#endif
+#if defined(__APPLE__)
+#include <netinet/in.h>
+#endif
+#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) && __FreeBSD_version >= 800000
+#include <netinet/udp_var.h>
+#endif
+#include <machine/in_cksum.h>
+#endif
+#if defined(__Userspace__) && defined(INET6)
+#include <netinet6/sctp6_var.h>
+#endif
+
+#if defined(__APPLE__)
+#define APPLE_FILE_NO 3
+#endif
+
+#if defined(__APPLE__)
+#if !(defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD))
+#define SCTP_MAX_LINKHDR 16
+#endif
+#endif
+
+#define SCTP_MAX_GAPS_INARRAY 4
+struct sack_track {
+	uint8_t right_edge;	/* mergable on the right edge */
+	uint8_t left_edge;	/* mergable on the left edge */
+	uint8_t num_entries;
+	uint8_t spare;
+	struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
+};
+
+const struct sack_track sack_array[256] = {
+	{0, 0, 0, 0,		/* 0x00 */
+		{{0, 0},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x01 */
+		{{0, 0},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x02 */
+		{{1, 1},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x03 */
+		{{0, 1},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x04 */
+		{{2, 2},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x05 */
+		{{0, 0},
+		{2, 2},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x06 */
+		{{1, 2},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x07 */
+		{{0, 2},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x08 */
+		{{3, 3},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x09 */
+		{{0, 0},
+		{3, 3},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x0a */
+		{{1, 1},
+		{3, 3},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x0b */
+		{{0, 1},
+		{3, 3},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x0c */
+		{{2, 3},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x0d */
+		{{0, 0},
+		{2, 3},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x0e */
+		{{1, 3},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x0f */
+		{{0, 3},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x10 */
+		{{4, 4},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x11 */
+		{{0, 0},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x12 */
+		{{1, 1},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x13 */
+		{{0, 1},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x14 */
+		{{2, 2},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x15 */
+		{{0, 0},
+		{2, 2},
+		{4, 4},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x16 */
+		{{1, 2},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x17 */
+		{{0, 2},
+		{4, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x18 */
+		{{3, 4},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x19 */
+		{{0, 0},
+		{3, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x1a */
+		{{1, 1},
+		{3, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x1b */
+		{{0, 1},
+		{3, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x1c */
+		{{2, 4},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x1d */
+		{{0, 0},
+		{2, 4},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x1e */
+		{{1, 4},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x1f */
+		{{0, 4},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x20 */
+		{{5, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x21 */
+		{{0, 0},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x22 */
+		{{1, 1},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x23 */
+		{{0, 1},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x24 */
+		{{2, 2},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x25 */
+		{{0, 0},
+		{2, 2},
+		{5, 5},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x26 */
+		{{1, 2},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x27 */
+		{{0, 2},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x28 */
+		{{3, 3},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x29 */
+		{{0, 0},
+		{3, 3},
+		{5, 5},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x2a */
+		{{1, 1},
+		{3, 3},
+		{5, 5},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x2b */
+		{{0, 1},
+		{3, 3},
+		{5, 5},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x2c */
+		{{2, 3},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x2d */
+		{{0, 0},
+		{2, 3},
+		{5, 5},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x2e */
+		{{1, 3},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x2f */
+		{{0, 3},
+		{5, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x30 */
+		{{4, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x31 */
+		{{0, 0},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x32 */
+		{{1, 1},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x33 */
+		{{0, 1},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x34 */
+		{{2, 2},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x35 */
+		{{0, 0},
+		{2, 2},
+		{4, 5},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x36 */
+		{{1, 2},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x37 */
+		{{0, 2},
+		{4, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x38 */
+		{{3, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x39 */
+		{{0, 0},
+		{3, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x3a */
+		{{1, 1},
+		{3, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x3b */
+		{{0, 1},
+		{3, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x3c */
+		{{2, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x3d */
+		{{0, 0},
+		{2, 5},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x3e */
+		{{1, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x3f */
+		{{0, 5},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x40 */
+		{{6, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x41 */
+		{{0, 0},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x42 */
+		{{1, 1},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x43 */
+		{{0, 1},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x44 */
+		{{2, 2},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x45 */
+		{{0, 0},
+		{2, 2},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x46 */
+		{{1, 2},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x47 */
+		{{0, 2},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x48 */
+		{{3, 3},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x49 */
+		{{0, 0},
+		{3, 3},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x4a */
+		{{1, 1},
+		{3, 3},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x4b */
+		{{0, 1},
+		{3, 3},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x4c */
+		{{2, 3},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x4d */
+		{{0, 0},
+		{2, 3},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x4e */
+		{{1, 3},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x4f */
+		{{0, 3},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x50 */
+		{{4, 4},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x51 */
+		{{0, 0},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x52 */
+		{{1, 1},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x53 */
+		{{0, 1},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x54 */
+		{{2, 2},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 4, 0,		/* 0x55 */
+		{{0, 0},
+		{2, 2},
+		{4, 4},
+		{6, 6}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x56 */
+		{{1, 2},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x57 */
+		{{0, 2},
+		{4, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x58 */
+		{{3, 4},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x59 */
+		{{0, 0},
+		{3, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x5a */
+		{{1, 1},
+		{3, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x5b */
+		{{0, 1},
+		{3, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x5c */
+		{{2, 4},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x5d */
+		{{0, 0},
+		{2, 4},
+		{6, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x5e */
+		{{1, 4},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x5f */
+		{{0, 4},
+		{6, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x60 */
+		{{5, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x61 */
+		{{0, 0},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x62 */
+		{{1, 1},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x63 */
+		{{0, 1},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x64 */
+		{{2, 2},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x65 */
+		{{0, 0},
+		{2, 2},
+		{5, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x66 */
+		{{1, 2},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x67 */
+		{{0, 2},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x68 */
+		{{3, 3},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x69 */
+		{{0, 0},
+		{3, 3},
+		{5, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 3, 0,		/* 0x6a */
+		{{1, 1},
+		{3, 3},
+		{5, 6},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x6b */
+		{{0, 1},
+		{3, 3},
+		{5, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x6c */
+		{{2, 3},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x6d */
+		{{0, 0},
+		{2, 3},
+		{5, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x6e */
+		{{1, 3},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x6f */
+		{{0, 3},
+		{5, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x70 */
+		{{4, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x71 */
+		{{0, 0},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x72 */
+		{{1, 1},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x73 */
+		{{0, 1},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x74 */
+		{{2, 2},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 3, 0,		/* 0x75 */
+		{{0, 0},
+		{2, 2},
+		{4, 6},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x76 */
+		{{1, 2},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x77 */
+		{{0, 2},
+		{4, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x78 */
+		{{3, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x79 */
+		{{0, 0},
+		{3, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 2, 0,		/* 0x7a */
+		{{1, 1},
+		{3, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x7b */
+		{{0, 1},
+		{3, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x7c */
+		{{2, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 2, 0,		/* 0x7d */
+		{{0, 0},
+		{2, 6},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 0, 1, 0,		/* 0x7e */
+		{{1, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 0, 1, 0,		/* 0x7f */
+		{{0, 6},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0x80 */
+		{{7, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0x81 */
+		{{0, 0},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x82 */
+		{{1, 1},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0x83 */
+		{{0, 1},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x84 */
+		{{2, 2},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x85 */
+		{{0, 0},
+		{2, 2},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x86 */
+		{{1, 2},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0x87 */
+		{{0, 2},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x88 */
+		{{3, 3},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x89 */
+		{{0, 0},
+		{3, 3},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0x8a */
+		{{1, 1},
+		{3, 3},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x8b */
+		{{0, 1},
+		{3, 3},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x8c */
+		{{2, 3},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x8d */
+		{{0, 0},
+		{2, 3},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x8e */
+		{{1, 3},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0x8f */
+		{{0, 3},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x90 */
+		{{4, 4},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x91 */
+		{{0, 0},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0x92 */
+		{{1, 1},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x93 */
+		{{0, 1},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0x94 */
+		{{2, 2},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0x95 */
+		{{0, 0},
+		{2, 2},
+		{4, 4},
+		{7, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0x96 */
+		{{1, 2},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x97 */
+		{{0, 2},
+		{4, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x98 */
+		{{3, 4},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x99 */
+		{{0, 0},
+		{3, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0x9a */
+		{{1, 1},
+		{3, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x9b */
+		{{0, 1},
+		{3, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x9c */
+		{{2, 4},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0x9d */
+		{{0, 0},
+		{2, 4},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0x9e */
+		{{1, 4},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0x9f */
+		{{0, 4},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xa0 */
+		{{5, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xa1 */
+		{{0, 0},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xa2 */
+		{{1, 1},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xa3 */
+		{{0, 1},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xa4 */
+		{{2, 2},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xa5 */
+		{{0, 0},
+		{2, 2},
+		{5, 5},
+		{7, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xa6 */
+		{{1, 2},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xa7 */
+		{{0, 2},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xa8 */
+		{{3, 3},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xa9 */
+		{{0, 0},
+		{3, 3},
+		{5, 5},
+		{7, 7}
+		}
+	},
+	{0, 1, 4, 0,		/* 0xaa */
+		{{1, 1},
+		{3, 3},
+		{5, 5},
+		{7, 7}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xab */
+		{{0, 1},
+		{3, 3},
+		{5, 5},
+		{7, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xac */
+		{{2, 3},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xad */
+		{{0, 0},
+		{2, 3},
+		{5, 5},
+		{7, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xae */
+		{{1, 3},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xaf */
+		{{0, 3},
+		{5, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xb0 */
+		{{4, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xb1 */
+		{{0, 0},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xb2 */
+		{{1, 1},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xb3 */
+		{{0, 1},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xb4 */
+		{{2, 2},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xb5 */
+		{{0, 0},
+		{2, 2},
+		{4, 5},
+		{7, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xb6 */
+		{{1, 2},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xb7 */
+		{{0, 2},
+		{4, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xb8 */
+		{{3, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xb9 */
+		{{0, 0},
+		{3, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xba */
+		{{1, 1},
+		{3, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xbb */
+		{{0, 1},
+		{3, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xbc */
+		{{2, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xbd */
+		{{0, 0},
+		{2, 5},
+		{7, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xbe */
+		{{1, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xbf */
+		{{0, 5},
+		{7, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xc0 */
+		{{6, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xc1 */
+		{{0, 0},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xc2 */
+		{{1, 1},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xc3 */
+		{{0, 1},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xc4 */
+		{{2, 2},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xc5 */
+		{{0, 0},
+		{2, 2},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xc6 */
+		{{1, 2},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xc7 */
+		{{0, 2},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xc8 */
+		{{3, 3},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xc9 */
+		{{0, 0},
+		{3, 3},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xca */
+		{{1, 1},
+		{3, 3},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xcb */
+		{{0, 1},
+		{3, 3},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xcc */
+		{{2, 3},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xcd */
+		{{0, 0},
+		{2, 3},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xce */
+		{{1, 3},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xcf */
+		{{0, 3},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xd0 */
+		{{4, 4},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xd1 */
+		{{0, 0},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xd2 */
+		{{1, 1},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xd3 */
+		{{0, 1},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xd4 */
+		{{2, 2},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 4, 0,		/* 0xd5 */
+		{{0, 0},
+		{2, 2},
+		{4, 4},
+		{6, 7}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xd6 */
+		{{1, 2},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xd7 */
+		{{0, 2},
+		{4, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xd8 */
+		{{3, 4},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xd9 */
+		{{0, 0},
+		{3, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xda */
+		{{1, 1},
+		{3, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xdb */
+		{{0, 1},
+		{3, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xdc */
+		{{2, 4},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xdd */
+		{{0, 0},
+		{2, 4},
+		{6, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xde */
+		{{1, 4},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xdf */
+		{{0, 4},
+		{6, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xe0 */
+		{{5, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xe1 */
+		{{0, 0},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xe2 */
+		{{1, 1},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xe3 */
+		{{0, 1},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xe4 */
+		{{2, 2},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xe5 */
+		{{0, 0},
+		{2, 2},
+		{5, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xe6 */
+		{{1, 2},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xe7 */
+		{{0, 2},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xe8 */
+		{{3, 3},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xe9 */
+		{{0, 0},
+		{3, 3},
+		{5, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 3, 0,		/* 0xea */
+		{{1, 1},
+		{3, 3},
+		{5, 7},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xeb */
+		{{0, 1},
+		{3, 3},
+		{5, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xec */
+		{{2, 3},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xed */
+		{{0, 0},
+		{2, 3},
+		{5, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xee */
+		{{1, 3},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xef */
+		{{0, 3},
+		{5, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xf0 */
+		{{4, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xf1 */
+		{{0, 0},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xf2 */
+		{{1, 1},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xf3 */
+		{{0, 1},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xf4 */
+		{{2, 2},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 3, 0,		/* 0xf5 */
+		{{0, 0},
+		{2, 2},
+		{4, 7},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xf6 */
+		{{1, 2},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xf7 */
+		{{0, 2},
+		{4, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xf8 */
+		{{3, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xf9 */
+		{{0, 0},
+		{3, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 2, 0,		/* 0xfa */
+		{{1, 1},
+		{3, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xfb */
+		{{0, 1},
+		{3, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xfc */
+		{{2, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 2, 0,		/* 0xfd */
+		{{0, 0},
+		{2, 7},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{0, 1, 1, 0,		/* 0xfe */
+		{{1, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	},
+	{1, 1, 1, 0,		/* 0xff */
+		{{0, 7},
+		{0, 0},
+		{0, 0},
+		{0, 0}
+		}
+	}
+};
+
+
+int
+sctp_is_address_in_scope(struct sctp_ifa *ifa,
+                         struct sctp_scoping *scope,
+                         int do_update)
+{
+	if ((scope->loopback_scope == 0) &&
+	    (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
+		/*
+		 * skip loopback if not in scope *
+		 */
+		return (0);
+	}
+	switch (ifa->address.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		if (scope->ipv4_addr_legal) {
+			struct sockaddr_in *sin;
+
+			sin = &ifa->address.sin;
+			if (sin->sin_addr.s_addr == 0) {
+				/* not in scope , unspecified */
+				return (0);
+			}
+			if ((scope->ipv4_local_scope == 0) &&
+			    (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
+				/* private address not in scope */
+				return (0);
+			}
+		} else {
+			return (0);
+		}
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		if (scope->ipv6_addr_legal) {
+			struct sockaddr_in6 *sin6;
+
+#if !defined(__Panda__)
+			/* Must update the flags,  bummer, which
+			 * means any IFA locks must now be applied HERE <->
+			 */
+			if (do_update) {
+				sctp_gather_internal_ifa_flags(ifa);
+			}
+#endif
+			if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+				return (0);
+			}
+			/* ok to use deprecated addresses? */
+			sin6 = &ifa->address.sin6;
+			if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+				/* skip unspecifed addresses */
+				return (0);
+			}
+			if (		/* (local_scope == 0) && */
+			    (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
+				return (0);
+			}
+			if ((scope->site_scope == 0) &&
+			    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
+				return (0);
+			}
+		} else {
+			return (0);
+		}
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		if (!scope->conn_addr_legal) {
+			return (0);
+		}
+		break;
+#endif
+	default:
+		return (0);
+	}
+	return (1);
+}
+
+static struct mbuf *
+sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
+{
+#if defined(INET) || defined(INET6)
+	struct sctp_paramhdr *parmh;
+	struct mbuf *mret;
+	uint16_t plen;
+#endif
+
+	switch (ifa->address.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
+		break;
+#endif
+	default:
+		return (m);
+	}
+#if defined(INET) || defined(INET6)
+	if (M_TRAILINGSPACE(m) >= plen) {
+		/* easy side we just drop it on the end */
+		parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
+		mret = m;
+	} else {
+		/* Need more space */
+		mret = m;
+		while (SCTP_BUF_NEXT(mret) != NULL) {
+			mret = SCTP_BUF_NEXT(mret);
+		}
+		SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
+		if (SCTP_BUF_NEXT(mret) == NULL) {
+			/* We are hosed, can't add more addresses */
+			return (m);
+		}
+		mret = SCTP_BUF_NEXT(mret);
+		parmh = mtod(mret, struct sctp_paramhdr *);
+	}
+	/* now add the parameter */
+	switch (ifa->address.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+	{
+		struct sctp_ipv4addr_param *ipv4p;
+		struct sockaddr_in *sin;
+
+		sin = &ifa->address.sin;
+		ipv4p = (struct sctp_ipv4addr_param *)parmh;
+		parmh->param_type = htons(SCTP_IPV4_ADDRESS);
+		parmh->param_length = htons(plen);
+		ipv4p->addr = sin->sin_addr.s_addr;
+		SCTP_BUF_LEN(mret) += plen;
+		break;
+	}
+#endif
+#ifdef INET6
+	case AF_INET6:
+	{
+		struct sctp_ipv6addr_param *ipv6p;
+		struct sockaddr_in6 *sin6;
+
+		sin6 = &ifa->address.sin6;
+		ipv6p = (struct sctp_ipv6addr_param *)parmh;
+		parmh->param_type = htons(SCTP_IPV6_ADDRESS);
+		parmh->param_length = htons(plen);
+		memcpy(ipv6p->addr, &sin6->sin6_addr,
+		    sizeof(ipv6p->addr));
+#if defined(SCTP_EMBEDDED_V6_SCOPE)
+		/* clear embedded scope in the address */
+		in6_clearscope((struct in6_addr *)ipv6p->addr);
+#endif
+		SCTP_BUF_LEN(mret) += plen;
+		break;
+	}
+#endif
+	default:
+		return (m);
+	}
+	if (len != NULL) {
+		*len += plen;
+	}
+	return (mret);
+#endif
+}
+
+
+struct mbuf *
+sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+                           struct sctp_scoping *scope,
+			   struct mbuf *m_at, int cnt_inits_to,
+			   uint16_t *padding_len, uint16_t *chunk_len)
+{
+	struct sctp_vrf *vrf = NULL;
+	int cnt, limit_out = 0, total_count;
+	uint32_t vrf_id;
+
+	vrf_id = inp->def_vrf_id;
+	SCTP_IPI_ADDR_RLOCK();
+	vrf = sctp_find_vrf(vrf_id);
+	if (vrf == NULL) {
+		SCTP_IPI_ADDR_RUNLOCK();
+		return (m_at);
+	}
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		struct sctp_ifa *sctp_ifap;
+		struct sctp_ifn *sctp_ifnp;
+
+		cnt = cnt_inits_to;
+		if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
+			limit_out = 1;
+			cnt = SCTP_ADDRESS_LIMIT;
+			goto skip_count;
+		}
+		LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
+			if ((scope->loopback_scope == 0) &&
+			    SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
+				/*
+				 * Skip loopback devices if loopback_scope
+				 * not set
+				 */
+				continue;
+			}
+			LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+				if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
+				    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+				                      &sctp_ifap->address.sin.sin_addr) != 0)) {
+					continue;
+				}
+#endif
+#ifdef INET6
+				if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
+				    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+				                      &sctp_ifap->address.sin6.sin6_addr) != 0)) {
+					continue;
+				}
+#endif
+#endif
+				if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
+					continue;
+				}
+#if defined(__Userspace__)
+				if (sctp_ifap->address.sa.sa_family == AF_CONN) {
+					continue;
+				}
+#endif
+				if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
+					continue;
+				}
+				cnt++;
+				if (cnt > SCTP_ADDRESS_LIMIT) {
+					break;
+				}
+			}
+			if (cnt > SCTP_ADDRESS_LIMIT) {
+				break;
+			}
+		}
+	skip_count:
+		if (cnt > 1) {
+			total_count = 0;
+			LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
+				cnt = 0;
+				if ((scope->loopback_scope == 0) &&
+				    SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
+					/*
+					 * Skip loopback devices if
+					 * loopback_scope not set
+					 */
+					continue;
+				}
+				LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+					if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
+					    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+					                      &sctp_ifap->address.sin.sin_addr) != 0)) {
+						continue;
+					}
+#endif
+#ifdef INET6
+					if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
+					    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+					                      &sctp_ifap->address.sin6.sin6_addr) != 0)) {
+						continue;
+					}
+#endif
+#endif
+					if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
+						continue;
+					}
+#if defined(__Userspace__)
+					if (sctp_ifap->address.sa.sa_family == AF_CONN) {
+						continue;
+					}
+#endif
+					if (sctp_is_address_in_scope(sctp_ifap,
+								     scope, 0) == 0) {
+						continue;
+					}
+					if ((chunk_len != NULL) &&
+					    (padding_len != NULL) &&
+					    (*padding_len > 0)) {
+						memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len);
+						SCTP_BUF_LEN(m_at) += *padding_len;
+						*chunk_len += *padding_len;
+						*padding_len = 0;
+					}
+					m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
+					if (limit_out) {
+						cnt++;
+						total_count++;
+						if (cnt >= 2) {
+							/* two from each address */
+							break;
+						}
+						if (total_count > SCTP_ADDRESS_LIMIT) {
+							/* No more addresses */
+							break;
+						}
+					}
+				}
+			}
+		}
+	} else {
+		struct sctp_laddr *laddr;
+
+		cnt = cnt_inits_to;
+		/* First, how many ? */
+		LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+			if (laddr->ifa == NULL) {
+				continue;
+			}
+			if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
+				/* Address being deleted by the system, dont
+				 * list.
+				 */
+				continue;
+			if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+				/* Address being deleted on this ep
+				 * don't list.
+				 */
+				continue;
+			}
+#if defined(__Userspace__)
+			if (laddr->ifa->address.sa.sa_family == AF_CONN) {
+				continue;
+			}
+#endif
+			if (sctp_is_address_in_scope(laddr->ifa,
+						     scope, 1) == 0) {
+				continue;
+			}
+			cnt++;
+		}
+		/*
+		 * To get through a NAT we only list addresses if we have
+		 * more than one. That way if you just bind a single address
+		 * we let the source of the init dictate our address.
+		 */
+		if (cnt > 1) {
+			cnt = cnt_inits_to;
+			LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+				if (laddr->ifa == NULL) {
+					continue;
+				}
+				if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
+					continue;
+				}
+#if defined(__Userspace__)
+				if (laddr->ifa->address.sa.sa_family == AF_CONN) {
+					continue;
+				}
+#endif
+				if (sctp_is_address_in_scope(laddr->ifa,
+							     scope, 0) == 0) {
+					continue;
+				}
+				if ((chunk_len != NULL) &&
+				    (padding_len != NULL) &&
+				    (*padding_len > 0)) {
+					memset(mtod(m_at, caddr_t) + *chunk_len, 0, *padding_len);
+					SCTP_BUF_LEN(m_at) += *padding_len;
+					*chunk_len += *padding_len;
+					*padding_len = 0;
+				}
+				m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
+				cnt++;
+				if (cnt >= SCTP_ADDRESS_LIMIT) {
+					break;
+				}
+			}
+		}
+	}
+	SCTP_IPI_ADDR_RUNLOCK();
+	return (m_at);
+}
+
+static struct sctp_ifa *
+sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
+			   uint8_t dest_is_loop,
+			   uint8_t dest_is_priv,
+			   sa_family_t fam)
+{
+	uint8_t dest_is_global = 0;
+	/* dest_is_priv is true if destination is a private address */
+	/* dest_is_loop is true if destination is a loopback addresses */
+
+	/**
+	 * Here we determine if its a preferred address. A preferred address
+	 * means it is the same scope or higher scope then the destination.
+	 * L = loopback, P = private, G = global
+	 * -----------------------------------------
+	 *    src    |  dest | result
+	 *  ----------------------------------------
+	 *     L     |    L  |    yes
+	 *  -----------------------------------------
+	 *     P     |    L  |    yes-v4 no-v6
+	 *  -----------------------------------------
+	 *     G     |    L  |    yes-v4 no-v6
+	 *  -----------------------------------------
+	 *     L     |    P  |    no
+	 *  -----------------------------------------
+	 *     P     |    P  |    yes
+	 *  -----------------------------------------
+	 *     G     |    P  |    no
+	 *   -----------------------------------------
+	 *     L     |    G  |    no
+	 *   -----------------------------------------
+	 *     P     |    G  |    no
+	 *    -----------------------------------------
+	 *     G     |    G  |    yes
+	 *    -----------------------------------------
+	 */
+
+	if (ifa->address.sa.sa_family != fam) {
+		/* forget mis-matched family */
+		return (NULL);
+	}
+	if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
+		dest_is_global = 1;
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
+	/* Ok the address may be ok */
+#ifdef INET6
+	if (fam == AF_INET6) {
+		/* ok to use deprecated addresses? no lets not! */
+		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
+			return (NULL);
+		}
+		if (ifa->src_is_priv && !ifa->src_is_loop) {
+			if (dest_is_loop) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
+				return (NULL);
+			}
+		}
+		if (ifa->src_is_glob) {
+			if (dest_is_loop) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
+				return (NULL);
+			}
+		}
+	}
+#endif
+	/* Now that we know what is what, implement or table
+	 * this could in theory be done slicker (it used to be), but this
+	 * is straightforward and easier to validate :-)
+	 */
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
+		ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
+		dest_is_loop, dest_is_priv, dest_is_global);
+
+	if ((ifa->src_is_loop) && (dest_is_priv)) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
+		return (NULL);
+	}
+	if ((ifa->src_is_glob) && (dest_is_priv)) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
+		return (NULL);
+	}
+	if ((ifa->src_is_loop) && (dest_is_global)) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
+		return (NULL);
+	}
+	if ((ifa->src_is_priv) && (dest_is_global)) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
+		return (NULL);
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
+	/* its a preferred address */
+	return (ifa);
+}
+
+static struct sctp_ifa *
+sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
+			    uint8_t dest_is_loop,
+			    uint8_t dest_is_priv,
+			    sa_family_t fam)
+{
+	uint8_t dest_is_global = 0;
+
+	/**
+	 * Here we determine if its a acceptable address. A acceptable
+	 * address means it is the same scope or higher scope but we can
+	 * allow for NAT which means its ok to have a global dest and a
+	 * private src.
+	 *
+	 * L = loopback, P = private, G = global
+	 * -----------------------------------------
+	 *  src    |  dest | result
+	 * -----------------------------------------
+	 *   L     |   L   |    yes
+	 *  -----------------------------------------
+	 *   P     |   L   |    yes-v4 no-v6
+	 *  -----------------------------------------
+	 *   G     |   L   |    yes
+	 * -----------------------------------------
+	 *   L     |   P   |    no
+	 * -----------------------------------------
+	 *   P     |   P   |    yes
+	 * -----------------------------------------
+	 *   G     |   P   |    yes - May not work
+	 * -----------------------------------------
+	 *   L     |   G   |    no
+	 * -----------------------------------------
+	 *   P     |   G   |    yes - May not work
+	 * -----------------------------------------
+	 *   G     |   G   |    yes
+	 * -----------------------------------------
+	 */
+
+	if (ifa->address.sa.sa_family != fam) {
+		/* forget non matching family */
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
+			ifa->address.sa.sa_family, fam);
+		return (NULL);
+	}
+	/* Ok the address may be ok */
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
+		dest_is_loop, dest_is_priv);
+	if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
+		dest_is_global = 1;
+	}
+#ifdef INET6
+	if (fam == AF_INET6) {
+		/* ok to use deprecated addresses? */
+		if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+			return (NULL);
+		}
+		if (ifa->src_is_priv) {
+			/* Special case, linklocal to loop */
+			if (dest_is_loop)
+				return (NULL);
+		}
+	}
+#endif
+	/*
+	 * Now that we know what is what, implement our table.
+	 * This could in theory be done slicker (it used to be), but this
+	 * is straightforward and easier to validate :-)
+	 */
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
+		ifa->src_is_loop,
+		dest_is_priv);
+	if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
+		return (NULL);
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
+		ifa->src_is_loop,
+		dest_is_global);
+	if ((ifa->src_is_loop == 1) && (dest_is_global)) {
+		return (NULL);
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
+	/* its an acceptable address */
+	return (ifa);
+}
+
+int
+sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
+{
+	struct sctp_laddr *laddr;
+
+	if (stcb == NULL) {
+		/* There are no restrictions, no TCB :-) */
+		return (0);
+	}
+	LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
+		if (laddr->ifa == NULL) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
+				__func__);
+			continue;
+		}
+		if (laddr->ifa == ifa) {
+			/* Yes it is on the list */
+			return (1);
+		}
+	}
+	return (0);
+}
+
+
+int
+sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
+{
+	struct sctp_laddr *laddr;
+
+	if (ifa == NULL)
+		return (0);
+	LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
+		if (laddr->ifa == NULL) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
+				__func__);
+			continue;
+		}
+		if ((laddr->ifa == ifa) && laddr->action == 0)
+			/* same pointer */
+			return (1);
+	}
+	return (0);
+}
+
+
+
+static struct sctp_ifa *
+sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
+			      sctp_route_t *ro,
+			      uint32_t vrf_id,
+			      int non_asoc_addr_ok,
+			      uint8_t dest_is_priv,
+			      uint8_t dest_is_loop,
+			      sa_family_t fam)
+{
+	struct sctp_laddr *laddr, *starting_point;
+	void *ifn;
+	int resettotop = 0;
+	struct sctp_ifn *sctp_ifn;
+	struct sctp_ifa *sctp_ifa, *sifa;
+	struct sctp_vrf *vrf;
+	uint32_t ifn_index;
+
+	vrf = sctp_find_vrf(vrf_id);
+	if (vrf == NULL)
+		return (NULL);
+
+	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+	sctp_ifn = sctp_find_ifn(ifn, ifn_index);
+	/*
+	 * first question, is the ifn we will emit on in our list, if so, we
+	 * want such an address. Note that we first looked for a
+	 * preferred address.
+	 */
+	if (sctp_ifn) {
+		/* is a preferred one on the interface we route out? */
+		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+			if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+			    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+				continue;
+			}
+#endif
+#ifdef INET6
+			if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+			    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+				continue;
+			}
+#endif
+#endif
+			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+			    (non_asoc_addr_ok == 0))
+				continue;
+			sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
+							  dest_is_loop,
+							  dest_is_priv, fam);
+			if (sifa == NULL)
+				continue;
+			if (sctp_is_addr_in_ep(inp, sifa)) {
+				atomic_add_int(&sifa->refcount, 1);
+				return (sifa);
+			}
+		}
+	}
+	/*
+	 * ok, now we now need to find one on the list of the addresses.
+	 * We can't get one on the emitting interface so let's find first
+	 * a preferred one. If not that an acceptable one otherwise...
+	 * we return NULL.
+	 */
+	starting_point = inp->next_addr_touse;
+ once_again:
+	if (inp->next_addr_touse == NULL) {
+		inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
+		resettotop = 1;
+	}
+	for (laddr = inp->next_addr_touse; laddr;
+	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+		if (laddr->ifa == NULL) {
+			/* address has been removed */
+			continue;
+		}
+		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+			/* address is being deleted */
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
+						  dest_is_priv, fam);
+		if (sifa == NULL)
+			continue;
+		atomic_add_int(&sifa->refcount, 1);
+		return (sifa);
+	}
+	if (resettotop == 0) {
+		inp->next_addr_touse = NULL;
+		goto once_again;
+	}
+
+	inp->next_addr_touse = starting_point;
+	resettotop = 0;
+ once_again_too:
+	if (inp->next_addr_touse == NULL) {
+		inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
+		resettotop = 1;
+	}
+
+	/* ok, what about an acceptable address in the inp */
+	for (laddr = inp->next_addr_touse; laddr;
+	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+		if (laddr->ifa == NULL) {
+			/* address has been removed */
+			continue;
+		}
+		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+			/* address is being deleted */
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
+						   dest_is_priv, fam);
+		if (sifa == NULL)
+			continue;
+		atomic_add_int(&sifa->refcount, 1);
+		return (sifa);
+	}
+	if (resettotop == 0) {
+		inp->next_addr_touse = NULL;
+		goto once_again_too;
+	}
+
+	/*
+	 * no address bound can be a source for the destination we are in
+	 * trouble
+	 */
+	return (NULL);
+}
+
+
+
+static struct sctp_ifa *
+sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
+			       struct sctp_tcb *stcb,
+			       sctp_route_t *ro,
+			       uint32_t vrf_id,
+			       uint8_t dest_is_priv,
+			       uint8_t dest_is_loop,
+			       int non_asoc_addr_ok,
+			       sa_family_t fam)
+{
+	struct sctp_laddr *laddr, *starting_point;
+	void *ifn;
+	struct sctp_ifn *sctp_ifn;
+	struct sctp_ifa *sctp_ifa, *sifa;
+	uint8_t start_at_beginning = 0;
+	struct sctp_vrf *vrf;
+	uint32_t ifn_index;
+
+	/*
+	 * first question, is the ifn we will emit on in our list, if so, we
+	 * want that one.
+	 */
+	vrf = sctp_find_vrf(vrf_id);
+	if (vrf == NULL)
+		return (NULL);
+
+	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+	sctp_ifn = sctp_find_ifn( ifn, ifn_index);
+
+	/*
+	 * first question, is the ifn we will emit on in our list?  If so,
+	 * we want that one. First we look for a preferred. Second, we go
+	 * for an acceptable.
+	 */
+	if (sctp_ifn) {
+		/* first try for a preferred address on the ep */
+		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+			if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+			    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+				continue;
+			}
+#endif
+#ifdef INET6
+			if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+			    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+				continue;
+			}
+#endif
+#endif
+			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
+				continue;
+			if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
+				sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
+				if (sifa == NULL)
+					continue;
+				if (((non_asoc_addr_ok == 0) &&
+				     (sctp_is_addr_restricted(stcb, sifa))) ||
+				    (non_asoc_addr_ok &&
+				     (sctp_is_addr_restricted(stcb, sifa)) &&
+				     (!sctp_is_addr_pending(stcb, sifa)))) {
+					/* on the no-no list */
+					continue;
+				}
+				atomic_add_int(&sifa->refcount, 1);
+				return (sifa);
+			}
+		}
+		/* next try for an acceptable address on the ep */
+		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+			if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+			    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+				continue;
+			}
+#endif
+#ifdef INET6
+			if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+			    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+				continue;
+			}
+#endif
+#endif
+			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
+				continue;
+			if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
+				sifa= sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv,fam);
+				if (sifa == NULL)
+					continue;
+				if (((non_asoc_addr_ok == 0) &&
+				     (sctp_is_addr_restricted(stcb, sifa))) ||
+				    (non_asoc_addr_ok &&
+				     (sctp_is_addr_restricted(stcb, sifa)) &&
+				     (!sctp_is_addr_pending(stcb, sifa)))) {
+					/* on the no-no list */
+					continue;
+				}
+				atomic_add_int(&sifa->refcount, 1);
+				return (sifa);
+			}
+		}
+
+	}
+	/*
+	 * if we can't find one like that then we must look at all
+	 * addresses bound to pick one at first preferable then
+	 * secondly acceptable.
+	 */
+	starting_point = stcb->asoc.last_used_address;
+ sctp_from_the_top:
+	if (stcb->asoc.last_used_address == NULL) {
+		start_at_beginning = 1;
+		stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
+	}
+	/* search beginning with the last used address */
+	for (laddr = stcb->asoc.last_used_address; laddr;
+	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+		if (laddr->ifa == NULL) {
+			/* address has been removed */
+			continue;
+		}
+		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+			/* address is being deleted */
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
+		if (sifa == NULL)
+			continue;
+		if (((non_asoc_addr_ok == 0) &&
+		     (sctp_is_addr_restricted(stcb, sifa))) ||
+		    (non_asoc_addr_ok &&
+		     (sctp_is_addr_restricted(stcb, sifa)) &&
+		     (!sctp_is_addr_pending(stcb, sifa)))) {
+			/* on the no-no list */
+			continue;
+		}
+		stcb->asoc.last_used_address = laddr;
+		atomic_add_int(&sifa->refcount, 1);
+		return (sifa);
+	}
+	if (start_at_beginning == 0) {
+		stcb->asoc.last_used_address = NULL;
+		goto sctp_from_the_top;
+	}
+	/* now try for any higher scope than the destination */
+	stcb->asoc.last_used_address = starting_point;
+	start_at_beginning = 0;
+ sctp_from_the_top2:
+	if (stcb->asoc.last_used_address == NULL) {
+		start_at_beginning = 1;
+		stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
+	}
+	/* search beginning with the last used address */
+	for (laddr = stcb->asoc.last_used_address; laddr;
+	     laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
+		if (laddr->ifa == NULL) {
+			/* address has been removed */
+			continue;
+		}
+		if (laddr->action == SCTP_DEL_IP_ADDRESS) {
+			/* address is being deleted */
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
+						   dest_is_priv, fam);
+		if (sifa == NULL)
+			continue;
+		if (((non_asoc_addr_ok == 0) &&
+		     (sctp_is_addr_restricted(stcb, sifa))) ||
+		    (non_asoc_addr_ok &&
+		     (sctp_is_addr_restricted(stcb, sifa)) &&
+		     (!sctp_is_addr_pending(stcb, sifa)))) {
+			/* on the no-no list */
+			continue;
+		}
+		stcb->asoc.last_used_address = laddr;
+		atomic_add_int(&sifa->refcount, 1);
+		return (sifa);
+	}
+	if (start_at_beginning == 0) {
+		stcb->asoc.last_used_address = NULL;
+		goto sctp_from_the_top2;
+	}
+	return (NULL);
+}
+
+static struct sctp_ifa *
+sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
+#if defined(__FreeBSD__)
+                                                 struct sctp_inpcb *inp,
+#else
+                                                 struct sctp_inpcb *inp SCTP_UNUSED,
+#endif
+						 struct sctp_tcb *stcb,
+						 int non_asoc_addr_ok,
+						 uint8_t dest_is_loop,
+						 uint8_t dest_is_priv,
+						 int addr_wanted,
+						 sa_family_t fam,
+						 sctp_route_t *ro
+						 )
+{
+	struct sctp_ifa *ifa, *sifa;
+	int num_eligible_addr = 0;
+#ifdef INET6
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+	struct sockaddr_in6 sin6, lsa6;
+
+	if (fam == AF_INET6) {
+		memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
+#ifdef SCTP_KAME
+		(void)sa6_recoverscope(&sin6);
+#else
+		(void)in6_recoverscope(&sin6, &sin6.sin6_addr, NULL);
+#endif  /* SCTP_KAME */
+	}
+#endif  /* SCTP_EMBEDDED_V6_SCOPE */
+#endif	/* INET6 */
+	LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+		if ((ifa->address.sa.sa_family == AF_INET) &&
+		    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+		                      &ifa->address.sin.sin_addr) != 0)) {
+			continue;
+		}
+#endif
+#ifdef INET6
+		if ((ifa->address.sa.sa_family == AF_INET6) &&
+		    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+		                      &ifa->address.sin6.sin6_addr) != 0)) {
+			continue;
+		}
+#endif
+#endif
+		if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+		    (non_asoc_addr_ok == 0))
+			continue;
+		sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
+						  dest_is_priv, fam);
+		if (sifa == NULL)
+			continue;
+#ifdef INET6
+		if (fam == AF_INET6 &&
+		    dest_is_loop &&
+		    sifa->src_is_loop && sifa->src_is_priv) {
+			/* don't allow fe80::1 to be a src on loop ::1, we don't list it
+			 * to the peer so we will get an abort.
+			 */
+			continue;
+		}
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		if (fam == AF_INET6 &&
+		    IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
+		    IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
+			/* link-local <-> link-local must belong to the same scope. */
+			memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
+#ifdef SCTP_KAME
+			(void)sa6_recoverscope(&lsa6);
+#else
+			(void)in6_recoverscope(&lsa6, &lsa6.sin6_addr, NULL);
+#endif  /* SCTP_KAME */
+			if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
+				continue;
+			}
+		}
+#endif  /* SCTP_EMBEDDED_V6_SCOPE */
+#endif	/* INET6 */
+
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__)
+		/* Check if the IPv6 address matches to next-hop.
+		   In the mobile case, old IPv6 address may be not deleted
+		   from the interface. Then, the interface has previous and
+		   new addresses.  We should use one corresponding to the
+		   next-hop.  (by micchie)
+		 */
+#ifdef INET6
+		if (stcb && fam == AF_INET6 &&
+		    sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
+			if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
+			    == 0) {
+				continue;
+			}
+		}
+#endif
+#ifdef INET
+		/* Avoid topologically incorrect IPv4 address */
+		if (stcb && fam == AF_INET &&
+		    sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
+			if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
+				continue;
+			}
+		}
+#endif
+#endif
+		if (stcb) {
+			if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
+				continue;
+			}
+			if (((non_asoc_addr_ok == 0) &&
+			     (sctp_is_addr_restricted(stcb, sifa))) ||
+			    (non_asoc_addr_ok &&
+			     (sctp_is_addr_restricted(stcb, sifa)) &&
+			     (!sctp_is_addr_pending(stcb, sifa)))) {
+				/*
+				 * It is restricted for some reason..
+				 * probably not yet added.
+				 */
+				continue;
+			}
+		}
+		if (num_eligible_addr >= addr_wanted) {
+			return (sifa);
+		}
+		num_eligible_addr++;
+	}
+	return (NULL);
+}
+
+
+static int
+sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
+#if defined(__FreeBSD__)
+                                  struct sctp_inpcb *inp,
+#else
+                                  struct sctp_inpcb *inp SCTP_UNUSED,
+#endif
+				  struct sctp_tcb *stcb,
+				  int non_asoc_addr_ok,
+				  uint8_t dest_is_loop,
+				  uint8_t dest_is_priv,
+				  sa_family_t fam)
+{
+	struct sctp_ifa *ifa, *sifa;
+	int num_eligible_addr = 0;
+
+	LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+		if ((ifa->address.sa.sa_family == AF_INET) &&
+		    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+		                      &ifa->address.sin.sin_addr) != 0)) {
+			continue;
+		}
+#endif
+#ifdef INET6
+		if ((ifa->address.sa.sa_family == AF_INET6) &&
+		    (stcb != NULL) &&
+		    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+		                      &ifa->address.sin6.sin6_addr) != 0)) {
+			continue;
+		}
+#endif
+#endif
+		if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+		    (non_asoc_addr_ok == 0)) {
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
+						  dest_is_priv, fam);
+		if (sifa == NULL) {
+			continue;
+		}
+		if (stcb) {
+			if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
+				continue;
+			}
+			if (((non_asoc_addr_ok == 0) &&
+			     (sctp_is_addr_restricted(stcb, sifa))) ||
+			    (non_asoc_addr_ok &&
+			     (sctp_is_addr_restricted(stcb, sifa)) &&
+			     (!sctp_is_addr_pending(stcb, sifa)))) {
+				/*
+				 * It is restricted for some reason..
+				 * probably not yet added.
+				 */
+				continue;
+			}
+		}
+		num_eligible_addr++;
+	}
+	return (num_eligible_addr);
+}
+
+static struct sctp_ifa *
+sctp_choose_boundall(struct sctp_inpcb *inp,
+                     struct sctp_tcb *stcb,
+		     struct sctp_nets *net,
+		     sctp_route_t *ro,
+		     uint32_t vrf_id,
+		     uint8_t dest_is_priv,
+		     uint8_t dest_is_loop,
+		     int non_asoc_addr_ok,
+		     sa_family_t fam)
+{
+	int cur_addr_num = 0, num_preferred = 0;
+	void *ifn;
+	struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
+	struct sctp_ifa *sctp_ifa, *sifa;
+	uint32_t ifn_index;
+	struct sctp_vrf *vrf;
+#ifdef INET
+	int retried = 0;
+#endif
+
+	/*-
+	 * For boundall we can use any address in the association.
+	 * If non_asoc_addr_ok is set we can use any address (at least in
+	 * theory). So we look for preferred addresses first. If we find one,
+	 * we use it. Otherwise we next try to get an address on the
+	 * interface, which we should be able to do (unless non_asoc_addr_ok
+	 * is false and we are routed out that way). In these cases where we
+	 * can't use the address of the interface we go through all the
+	 * ifn's looking for an address we can use and fill that in. Punting
+	 * means we send back address 0, which will probably cause problems
+	 * actually since then IP will fill in the address of the route ifn,
+	 * which means we probably already rejected it.. i.e. here comes an
+	 * abort :-<.
+	 */
+	vrf = sctp_find_vrf(vrf_id);
+	if (vrf == NULL)
+		return (NULL);
+
+	ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+	ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
+	SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
+	emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
+	if (sctp_ifn == NULL) {
+		/* ?? We don't have this guy ?? */
+		SCTPDBG(SCTP_DEBUG_OUTPUT2,"No ifn emit interface?\n");
+		goto bound_all_plan_b;
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT2,"ifn_index:%d name:%s is emit interface\n",
+		ifn_index, sctp_ifn->ifn_name);
+
+	if (net) {
+		cur_addr_num = net->indx_of_eligible_next_to_use;
+	}
+	num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
+							  inp, stcb,
+							  non_asoc_addr_ok,
+							  dest_is_loop,
+							  dest_is_priv, fam);
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
+		num_preferred, sctp_ifn->ifn_name);
+	if (num_preferred == 0) {
+		/*
+		 * no eligible addresses, we must use some other interface
+		 * address if we can find one.
+		 */
+		goto bound_all_plan_b;
+	}
+	/*
+	 * Ok we have num_eligible_addr set with how many we can use, this
+	 * may vary from call to call due to addresses being deprecated
+	 * etc..
+	 */
+	if (cur_addr_num >= num_preferred) {
+		cur_addr_num = 0;
+	}
+	/*
+	 * select the nth address from the list (where cur_addr_num is the
+	 * nth) and 0 is the first one, 1 is the second one etc...
+	 */
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
+
+	sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
+                                                                    dest_is_priv, cur_addr_num, fam, ro);
+
+	/* if sctp_ifa is NULL something changed??, fall to plan b. */
+	if (sctp_ifa) {
+		atomic_add_int(&sctp_ifa->refcount, 1);
+		if (net) {
+			/* save off where the next one we will want */
+			net->indx_of_eligible_next_to_use = cur_addr_num + 1;
+		}
+		return (sctp_ifa);
+	}
+	/*
+	 * plan_b: Look at all interfaces and find a preferred address. If
+	 * no preferred fall through to plan_c.
+	 */
+ bound_all_plan_b:
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
+	LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
+			sctp_ifn->ifn_name);
+		if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+			/* wrong base scope */
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
+			continue;
+		}
+		if ((sctp_ifn == looked_at) && looked_at) {
+			/* already looked at this guy */
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
+			continue;
+		}
+		num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
+                                                                  dest_is_loop, dest_is_priv, fam);
+		SCTPDBG(SCTP_DEBUG_OUTPUT2,
+			"Found ifn:%p %d preferred source addresses\n",
+			ifn, num_preferred);
+		if (num_preferred == 0) {
+			/* None on this interface. */
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
+			continue;
+		}
+		SCTPDBG(SCTP_DEBUG_OUTPUT2,
+			"num preferred:%d on interface:%p cur_addr_num:%d\n",
+			num_preferred, (void *)sctp_ifn, cur_addr_num);
+
+		/*
+		 * Ok we have num_eligible_addr set with how many we can
+		 * use, this may vary from call to call due to addresses
+		 * being deprecated etc..
+		 */
+		if (cur_addr_num >= num_preferred) {
+			cur_addr_num = 0;
+		}
+		sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
+                                                                        dest_is_priv, cur_addr_num, fam, ro);
+		if (sifa == NULL)
+			continue;
+		if (net) {
+			net->indx_of_eligible_next_to_use = cur_addr_num + 1;
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
+				cur_addr_num);
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
+			SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
+			SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
+		}
+		atomic_add_int(&sifa->refcount, 1);
+		return (sifa);
+	}
+#ifdef INET
+again_with_private_addresses_allowed:
+#endif
+	/* plan_c: do we have an acceptable address on the emit interface */
+	sifa = NULL;
+	SCTPDBG(SCTP_DEBUG_OUTPUT2,"Trying Plan C: find acceptable on interface\n");
+	if (emit_ifn == NULL) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jump to Plan D - no emit_ifn\n");
+		goto plan_d;
+	}
+	LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
+#if defined(__FreeBSD__)
+#ifdef INET
+		if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+		    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+		                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jailed\n");
+			continue;
+		}
+#endif
+#ifdef INET6
+		if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+		    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+		                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT2,"Jailed\n");
+			continue;
+		}
+#endif
+#endif
+		if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+		    (non_asoc_addr_ok == 0)) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT2,"Defer\n");
+			continue;
+		}
+		sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
+						   dest_is_priv, fam);
+		if (sifa == NULL) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
+			continue;
+		}
+		if (stcb) {
+			if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
+				sifa = NULL;
+				continue;
+			}
+			if (((non_asoc_addr_ok == 0) &&
+			     (sctp_is_addr_restricted(stcb, sifa))) ||
+			    (non_asoc_addr_ok &&
+			     (sctp_is_addr_restricted(stcb, sifa)) &&
+			     (!sctp_is_addr_pending(stcb, sifa)))) {
+				/*
+				 * It is restricted for some
+				 * reason.. probably not yet added.
+				 */
+				SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
+				sifa = NULL;
+				continue;
+			}
+		}
+		atomic_add_int(&sifa->refcount, 1);
+		goto out;
+	}
+ plan_d:
+	/*
+	 * plan_d: We are in trouble. No preferred address on the emit
+	 * interface. And not even a preferred address on all interfaces.
+	 * Go out and see if we can find an acceptable address somewhere
+	 * amongst all interfaces.
+	 */
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
+	LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+		if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+			/* wrong base scope */
+			continue;
+		}
+		LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+#if defined(__FreeBSD__)
+#ifdef INET
+			if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+			    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+				continue;
+			}
+#endif
+#ifdef INET6
+			if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+			    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+			                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+				continue;
+			}
+#endif
+#endif
+			if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+			    (non_asoc_addr_ok == 0))
+				continue;
+			sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
+							   dest_is_loop,
+							   dest_is_priv, fam);
+			if (sifa == NULL)
+				continue;
+			if (stcb) {
+				if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
+					sifa = NULL;
+					continue;
+				}
+				if (((non_asoc_addr_ok == 0) &&
+				     (sctp_is_addr_restricted(stcb, sifa))) ||
+				    (non_asoc_addr_ok &&
+				     (sctp_is_addr_restricted(stcb, sifa)) &&
+				     (!sctp_is_addr_pending(stcb, sifa)))) {
+					/*
+					 * It is restricted for some
+					 * reason.. probably not yet added.
+					 */
+					sifa = NULL;
+					continue;
+				}
+			}
+			goto out;
+		}
+	}
+#ifdef INET
+	if (stcb) {
+		if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
+			stcb->asoc.scope.ipv4_local_scope = 1;
+			retried = 1;
+			goto again_with_private_addresses_allowed;
+		} else if (retried == 1) {
+			stcb->asoc.scope.ipv4_local_scope = 0;
+		}
+	}
+#endif
+out:
+#ifdef INET
+	if (sifa) {
+		if (retried == 1) {
+			LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
+				if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
+					/* wrong base scope */
+					continue;
+				}
+				LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
+					struct sctp_ifa *tmp_sifa;
+
+#if defined(__FreeBSD__)
+#ifdef INET
+					if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
+					    (prison_check_ip4(inp->ip_inp.inp.inp_cred,
+					                      &sctp_ifa->address.sin.sin_addr) != 0)) {
+						continue;
+					}
+#endif
+#ifdef INET6
+					if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
+					    (prison_check_ip6(inp->ip_inp.inp.inp_cred,
+					                      &sctp_ifa->address.sin6.sin6_addr) != 0)) {
+						continue;
+					}
+#endif
+#endif
+					if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
+					    (non_asoc_addr_ok == 0))
+						continue;
+					tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
+					                                       dest_is_loop,
+					                                       dest_is_priv, fam);
+					if (tmp_sifa == NULL) {
+						continue;
+					}
+					if (tmp_sifa == sifa) {
+						continue;
+					}
+					if (stcb) {
+						if (sctp_is_address_in_scope(tmp_sifa,
+						                             &stcb->asoc.scope, 0) == 0) {
+							continue;
+						}
+						if (((non_asoc_addr_ok == 0) &&
+						     (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
+						    (non_asoc_addr_ok &&
+						     (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
+						     (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
+							/*
+							 * It is restricted for some
+							 * reason.. probably not yet added.
+							 */
+							continue;
+						}
+					}
+					if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
+					    (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
+						sctp_add_local_addr_restricted(stcb, tmp_sifa);
+					}
+				}
+			}
+		}
+		atomic_add_int(&sifa->refcount, 1);
+	}
+#endif
+	return (sifa);
+}
+
+
+
+/* tcb may be NULL */
+struct sctp_ifa *
+sctp_source_address_selection(struct sctp_inpcb *inp,
+			      struct sctp_tcb *stcb,
+			      sctp_route_t *ro,
+			      struct sctp_nets *net,
+			      int non_asoc_addr_ok, uint32_t vrf_id)
+{
+	struct sctp_ifa *answer;
+	uint8_t dest_is_priv, dest_is_loop;
+	sa_family_t fam;
+#ifdef INET
+	struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
+#endif
+
+	/**
+	 * Rules:
+	 * - Find the route if needed, cache if I can.
+	 * - Look at interface address in route, Is it in the bound list. If so we
+	 *   have the best source.
+	 * - If not we must rotate amongst the addresses.
+	 *
+	 * Cavets and issues
+	 *
+	 * Do we need to pay attention to scope. We can have a private address
+	 * or a global address we are sourcing or sending to. So if we draw
+	 * it out
+	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+	 * For V4
+	 * ------------------------------------------
+	 *      source     *      dest  *  result
+	 * -----------------------------------------
+	 * <a>  Private    *    Global  *  NAT
+	 * -----------------------------------------
+	 * <b>  Private    *    Private *  No problem
+	 * -----------------------------------------
+	 * <c>  Global     *    Private *  Huh, How will this work?
+	 * -----------------------------------------
+	 * <d>  Global     *    Global  *  No Problem
+	 *------------------------------------------
+	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+	 * For V6
+	 *------------------------------------------
+	 *      source     *      dest  *  result
+	 * -----------------------------------------
+	 * <a>  Linklocal  *    Global  *
+	 * -----------------------------------------
+	 * <b>  Linklocal  * Linklocal  *  No problem
+	 * -----------------------------------------
+	 * <c>  Global     * Linklocal  *  Huh, How will this work?
+	 * -----------------------------------------
+	 * <d>  Global     *    Global  *  No Problem
+	 *------------------------------------------
+	 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
+	 *
+	 * And then we add to that what happens if there are multiple addresses
+	 * assigned to an interface. Remember the ifa on a ifn is a linked
+	 * list of addresses. So one interface can have more than one IP
+	 * address. What happens if we have both a private and a global
+	 * address? Do we then use context of destination to sort out which
+	 * one is best? And what about NAT's sending P->G may get you a NAT
+	 * translation, or should you select the G thats on the interface in
+	 * preference.
+	 *
+	 * Decisions:
+	 *
+	 * - count the number of addresses on the interface.
+	 * - if it is one, no problem except case <c>.
+	 *   For <a> we will assume a NAT out there.
+	 * - if there are more than one, then we need to worry about scope P
+	 *   or G. We should prefer G -> G and P -> P if possible.
+	 *   Then as a secondary fall back to mixed types G->P being a last
+	 *   ditch one.
+	 * - The above all works for bound all, but bound specific we need to
+	 *   use the same concept but instead only consider the bound
+	 *   addresses. If the bound set is NOT assigned to the interface then
+	 *   we must use rotation amongst the bound addresses..
+	 */
+	if (ro->ro_rt == NULL) {
+		/*
+		 * Need a route to cache.
+		 */
+		SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
+	}
+	if (ro->ro_rt == NULL) {
+		return (NULL);
+	}
+#if defined(__Userspace_os_Windows)
+	/* On Windows the sa_family is U_SHORT or ADDRESS_FAMILY */
+	fam = (sa_family_t)ro->ro_dst.sa_family;
+#else
+	fam = ro->ro_dst.sa_family;
+#endif
+	dest_is_priv = dest_is_loop = 0;
+	/* Setup our scopes for the destination */
+	switch (fam) {
+#ifdef INET
+	case AF_INET:
+		/* Scope based on outbound address */
+		if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
+			dest_is_loop = 1;
+			if (net != NULL) {
+				/* mark it as local */
+				net->addr_is_local = 1;
+			}
+		} else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
+			dest_is_priv = 1;
+		}
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		/* Scope based on outbound address */
+#if defined(__Userspace_os_Windows)
+		if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr)) {
+#else
+		if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
+		    SCTP_ROUTE_IS_REAL_LOOP(ro)) {
+#endif
+			/*
+			 * If the address is a loopback address, which
+			 * consists of "::1" OR "fe80::1%lo0", we are loopback
+			 * scope. But we don't use dest_is_priv (link local
+			 * addresses).
+			 */
+			dest_is_loop = 1;
+			if (net != NULL) {
+				/* mark it as local */
+				net->addr_is_local = 1;
+			}
+		} else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
+			dest_is_priv = 1;
+		}
+		break;
+#endif
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
+	SCTP_IPI_ADDR_RLOCK();
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
+		/*
+		 * Bound all case
+		 */
+		answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
+					      dest_is_priv, dest_is_loop,
+					      non_asoc_addr_ok, fam);
+		SCTP_IPI_ADDR_RUNLOCK();
+		return (answer);
+	}
+	/*
+	 * Subset bound case
+	 */
+	if (stcb) {
+		answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
+							vrf_id,	dest_is_priv,
+							dest_is_loop,
+							non_asoc_addr_ok, fam);
+	} else {
+		answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
+						       non_asoc_addr_ok,
+						       dest_is_priv,
+						       dest_is_loop, fam);
+	}
+	SCTP_IPI_ADDR_RUNLOCK();
+	return (answer);
+}
+
+static int
+sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
+{
+#if defined(__Userspace_os_Windows)
+	WSACMSGHDR cmh;
+#else
+	struct cmsghdr cmh;
+#endif
+	int tlen, at, found;
+	struct sctp_sndinfo sndinfo;
+	struct sctp_prinfo prinfo;
+	struct sctp_authinfo authinfo;
+
+	tlen = SCTP_BUF_LEN(control);
+	at = 0;
+	found = 0;
+	/*
+	 * Independent of how many mbufs, find the c_type inside the control
+	 * structure and copy out the data.
+	 */
+	while (at < tlen) {
+		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
+			/* There is not enough room for one more. */
+			return (found);
+		}
+		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
+		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
+			/* We dont't have a complete CMSG header. */
+			return (found);
+		}
+		if (((int)cmh.cmsg_len + at) > tlen) {
+			/* We don't have the complete CMSG. */
+			return (found);
+		}
+		if ((cmh.cmsg_level == IPPROTO_SCTP) &&
+		    ((c_type == cmh.cmsg_type) ||
+		     ((c_type == SCTP_SNDRCV) &&
+		      ((cmh.cmsg_type == SCTP_SNDINFO) ||
+		       (cmh.cmsg_type == SCTP_PRINFO) ||
+		       (cmh.cmsg_type == SCTP_AUTHINFO))))) {
+			if (c_type == cmh.cmsg_type) {
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
+					return (found);
+				}
+				/* It is exactly what we want. Copy it out. */
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), (int)cpsize, (caddr_t)data);
+				return (1);
+			} else {
+				struct sctp_sndrcvinfo *sndrcvinfo;
+
+				sndrcvinfo = (struct sctp_sndrcvinfo *)data;
+				if (found == 0) {
+					if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
+						return (found);
+					}
+					memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
+				}
+				switch (cmh.cmsg_type) {
+				case SCTP_SNDINFO:
+					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
+						return (found);
+					}
+					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
+					sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
+					sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
+					sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
+					sndrcvinfo->sinfo_context = sndinfo.snd_context;
+					sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
+					break;
+				case SCTP_PRINFO:
+					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
+						return (found);
+					}
+					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
+					if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
+						sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
+					} else {
+						sndrcvinfo->sinfo_timetolive = 0;
+					}
+					sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
+					break;
+				case SCTP_AUTHINFO:
+					if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
+						return (found);
+					}
+					m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
+					sndrcvinfo->sinfo_keynumber_valid = 1;
+					sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
+					break;
+				default:
+					return (found);
+				}
+				found = 1;
+			}
+		}
+		at += CMSG_ALIGN(cmh.cmsg_len);
+	}
+	return (found);
+}
+
+static int
+sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
+{
+#if defined(__Userspace_os_Windows)
+	WSACMSGHDR cmh;
+#else
+	struct cmsghdr cmh;
+#endif
+	int tlen, at;
+	struct sctp_initmsg initmsg;
+#ifdef INET
+	struct sockaddr_in sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 sin6;
+#endif
+
+	tlen = SCTP_BUF_LEN(control);
+	at = 0;
+	while (at < tlen) {
+		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
+			/* There is not enough room for one more. */
+			*error = EINVAL;
+			return (1);
+		}
+		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
+		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
+			/* We dont't have a complete CMSG header. */
+			*error = EINVAL;
+			return (1);
+		}
+		if (((int)cmh.cmsg_len + at) > tlen) {
+			/* We don't have the complete CMSG. */
+			*error = EINVAL;
+			return (1);
+		}
+		if (cmh.cmsg_level == IPPROTO_SCTP) {
+			switch (cmh.cmsg_type) {
+			case SCTP_INIT:
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
+					*error = EINVAL;
+					return (1);
+				}
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
+				if (initmsg.sinit_max_attempts)
+					stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
+				if (initmsg.sinit_num_ostreams)
+					stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
+				if (initmsg.sinit_max_instreams)
+					stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
+				if (initmsg.sinit_max_init_timeo)
+					stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
+				if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
+					struct sctp_stream_out *tmp_str;
+					unsigned int i;
+#if defined(SCTP_DETAILED_STR_STATS)
+					int j;
+#endif
+
+					/* Default is NOT correct */
+					SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
+						stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
+					SCTP_TCB_UNLOCK(stcb);
+					SCTP_MALLOC(tmp_str,
+					            struct sctp_stream_out *,
+					            (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
+					            SCTP_M_STRMO);
+					SCTP_TCB_LOCK(stcb);
+					if (tmp_str != NULL) {
+						SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
+						stcb->asoc.strmout = tmp_str;
+						stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
+					} else {
+						stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
+					}
+					for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+						TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
+						stcb->asoc.strmout[i].chunks_on_queues = 0;
+						stcb->asoc.strmout[i].next_mid_ordered = 0;
+						stcb->asoc.strmout[i].next_mid_unordered = 0;
+#if defined(SCTP_DETAILED_STR_STATS)
+						for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
+							stcb->asoc.strmout[i].abandoned_sent[j] = 0;
+							stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
+						}
+#else
+						stcb->asoc.strmout[i].abandoned_sent[0] = 0;
+						stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
+#endif
+						stcb->asoc.strmout[i].sid = i;
+						stcb->asoc.strmout[i].last_msg_incomplete = 0;
+						stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
+						stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
+					}
+				}
+				break;
+#ifdef INET
+			case SCTP_DSTADDRV4:
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
+					*error = EINVAL;
+					return (1);
+				}
+				memset(&sin, 0, sizeof(struct sockaddr_in));
+				sin.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+				sin.sin_len = sizeof(struct sockaddr_in);
+#endif
+				sin.sin_port = stcb->rport;
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
+				if ((sin.sin_addr.s_addr == INADDR_ANY) ||
+				    (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
+				    IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
+					*error = EINVAL;
+					return (1);
+				}
+				if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
+				                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
+					*error = ENOBUFS;
+					return (1);
+				}
+				break;
+#endif
+#ifdef INET6
+			case SCTP_DSTADDRV6:
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
+					*error = EINVAL;
+					return (1);
+				}
+				memset(&sin6, 0, sizeof(struct sockaddr_in6));
+				sin6.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+				sin6.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+				sin6.sin6_port = stcb->rport;
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
+				if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
+				    IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
+					*error = EINVAL;
+					return (1);
+				}
+#ifdef INET
+				if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
+					in6_sin6_2_sin(&sin, &sin6);
+					if ((sin.sin_addr.s_addr == INADDR_ANY) ||
+					    (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
+					    IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
+						*error = EINVAL;
+						return (1);
+					}
+					if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
+					                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
+						*error = ENOBUFS;
+						return (1);
+					}
+				} else
+#endif
+					if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
+					                         SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
+						*error = ENOBUFS;
+						return (1);
+					}
+				break;
+#endif
+			default:
+				break;
+			}
+		}
+		at += CMSG_ALIGN(cmh.cmsg_len);
+	}
+	return (0);
+}
+
+static struct sctp_tcb *
+sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
+                           uint16_t port,
+                           struct mbuf *control,
+                           struct sctp_nets **net_p,
+                           int *error)
+{
+#if defined(__Userspace_os_Windows)
+	WSACMSGHDR cmh;
+#else
+	struct cmsghdr cmh;
+#endif
+	int tlen, at;
+	struct sctp_tcb *stcb;
+	struct sockaddr *addr;
+#ifdef INET
+	struct sockaddr_in sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 sin6;
+#endif
+
+	tlen = SCTP_BUF_LEN(control);
+	at = 0;
+	while (at < tlen) {
+		if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
+			/* There is not enough room for one more. */
+			*error = EINVAL;
+			return (NULL);
+		}
+		m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
+		if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
+			/* We dont't have a complete CMSG header. */
+			*error = EINVAL;
+			return (NULL);
+		}
+		if (((int)cmh.cmsg_len + at) > tlen) {
+			/* We don't have the complete CMSG. */
+			*error = EINVAL;
+			return (NULL);
+		}
+		if (cmh.cmsg_level == IPPROTO_SCTP) {
+			switch (cmh.cmsg_type) {
+#ifdef INET
+			case SCTP_DSTADDRV4:
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
+					*error = EINVAL;
+					return (NULL);
+				}
+				memset(&sin, 0, sizeof(struct sockaddr_in));
+				sin.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+				sin.sin_len = sizeof(struct sockaddr_in);
+#endif
+				sin.sin_port = port;
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
+				addr = (struct sockaddr *)&sin;
+				break;
+#endif
+#ifdef INET6
+			case SCTP_DSTADDRV6:
+				if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
+					*error = EINVAL;
+					return (NULL);
+				}
+				memset(&sin6, 0, sizeof(struct sockaddr_in6));
+				sin6.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+				sin6.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+				sin6.sin6_port = port;
+				m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
+#ifdef INET
+				if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
+					in6_sin6_2_sin(&sin, &sin6);
+					addr = (struct sockaddr *)&sin;
+				} else
+#endif
+					addr = (struct sockaddr *)&sin6;
+				break;
+#endif
+			default:
+				addr = NULL;
+				break;
+			}
+			if (addr) {
+				stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
+				if (stcb != NULL) {
+					return (stcb);
+				}
+			}
+		}
+		at += CMSG_ALIGN(cmh.cmsg_len);
+	}
+	return (NULL);
+}
+
+static struct mbuf *
+sctp_add_cookie(struct mbuf *init, int init_offset,
+    struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
+{
+	struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
+	struct sctp_state_cookie *stc;
+	struct sctp_paramhdr *ph;
+	uint8_t *foo;
+	int sig_offset;
+	uint16_t cookie_sz;
+
+	mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
+				      sizeof(struct sctp_paramhdr)), 0,
+				     M_NOWAIT, 1, MT_DATA);
+	if (mret == NULL) {
+		return (NULL);
+	}
+	copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
+	if (copy_init == NULL) {
+		sctp_m_freem(mret);
+		return (NULL);
+	}
+#ifdef SCTP_MBUF_LOGGING
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+		sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
+	}
+#endif
+	copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
+	    M_NOWAIT);
+	if (copy_initack == NULL) {
+		sctp_m_freem(mret);
+		sctp_m_freem(copy_init);
+		return (NULL);
+	}
+#ifdef SCTP_MBUF_LOGGING
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+		sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
+	}
+#endif
+	/* easy side we just drop it on the end */
+	ph = mtod(mret, struct sctp_paramhdr *);
+	SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
+	    sizeof(struct sctp_paramhdr);
+	stc = (struct sctp_state_cookie *)((caddr_t)ph +
+	    sizeof(struct sctp_paramhdr));
+	ph->param_type = htons(SCTP_STATE_COOKIE);
+	ph->param_length = 0;	/* fill in at the end */
+	/* Fill in the stc cookie data */
+	memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
+
+	/* tack the INIT and then the INIT-ACK onto the chain */
+	cookie_sz = 0;
+	for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+		cookie_sz += SCTP_BUF_LEN(m_at);
+		if (SCTP_BUF_NEXT(m_at) == NULL) {
+			SCTP_BUF_NEXT(m_at) = copy_init;
+			break;
+		}
+	}
+	for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+		cookie_sz += SCTP_BUF_LEN(m_at);
+		if (SCTP_BUF_NEXT(m_at) == NULL) {
+			SCTP_BUF_NEXT(m_at) = copy_initack;
+			break;
+		}
+	}
+	for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+		cookie_sz += SCTP_BUF_LEN(m_at);
+		if (SCTP_BUF_NEXT(m_at) == NULL) {
+			break;
+		}
+	}
+	sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
+	if (sig == NULL) {
+		/* no space, so free the entire chain */
+		sctp_m_freem(mret);
+		return (NULL);
+	}
+	SCTP_BUF_LEN(sig) = 0;
+	SCTP_BUF_NEXT(m_at) = sig;
+	sig_offset = 0;
+	foo = (uint8_t *) (mtod(sig, caddr_t) + sig_offset);
+	memset(foo, 0, SCTP_SIGNATURE_SIZE);
+	*signature = foo;
+	SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
+	cookie_sz += SCTP_SIGNATURE_SIZE;
+	ph->param_length = htons(cookie_sz);
+	return (mret);
+}
+
+
+static uint8_t
+sctp_get_ect(struct sctp_tcb *stcb)
+{
+	if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
+		return (SCTP_ECT0_BIT);
+	} else {
+		return (0);
+	}
+}
+
+#if defined(INET) || defined(INET6)
+static void
+sctp_handle_no_route(struct sctp_tcb *stcb,
+                     struct sctp_nets *net,
+                     int so_locked)
+{
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
+
+	if (net) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
+		if (net->dest_state & SCTP_ADDR_CONFIRMED) {
+			if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
+				sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
+			                        stcb, 0,
+			                        (void *)net,
+			                        so_locked);
+				net->dest_state &= ~SCTP_ADDR_REACHABLE;
+				net->dest_state &= ~SCTP_ADDR_PF;
+			}
+		}
+		if (stcb) {
+			if (net == stcb->asoc.primary_destination) {
+				/* need a new primary */
+				struct sctp_nets *alt;
+
+				alt = sctp_find_alternate_net(stcb, net, 0);
+				if (alt != net) {
+					if (stcb->asoc.alternate) {
+						sctp_free_remote_addr(stcb->asoc.alternate);
+					}
+					stcb->asoc.alternate = alt;
+					atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
+					if (net->ro._s_addr) {
+						sctp_free_ifa(net->ro._s_addr);
+						net->ro._s_addr = NULL;
+					}
+					net->src_addr_selected = 0;
+				}
+			}
+		}
+	}
+}
+#endif
+
+static int
+sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,	/* may be NULL */
+    struct sctp_nets *net,
+    struct sockaddr *to,
+    struct mbuf *m,
+    uint32_t auth_offset,
+    struct sctp_auth_chunk *auth,
+    uint16_t auth_keyid,
+    int nofragment_flag,
+    int ecn_ok,
+    int out_of_asoc_ok,
+    uint16_t src_port,
+    uint16_t dest_port,
+    uint32_t v_tag,
+    uint16_t port,
+    union sctp_sockstore *over_addr,
+#if defined(__FreeBSD__)
+    uint8_t mflowtype, uint32_t mflowid,
+#endif
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+    int so_locked SCTP_UNUSED
+#else
+    int so_locked
+#endif
+    )
+/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
+{
+	/**
+	 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
+	 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
+	 * - fill in the HMAC digest of any AUTH chunk in the packet.
+	 * - calculate and fill in the SCTP checksum.
+	 * - prepend an IP address header.
+	 * - if boundall use INADDR_ANY.
+	 * - if boundspecific do source address selection.
+	 * - set fragmentation option for ipV4.
+	 * - On return from IP output, check/adjust mtu size of output
+	 *   interface and smallest_mtu size as well.
+	 */
+	/* Will need ifdefs around this */
+#ifdef __Panda__
+	pakhandle_type o_pak;
+#endif
+	struct mbuf *newm;
+	struct sctphdr *sctphdr;
+	int packet_length;
+	int ret;
+#if defined(INET) || defined(INET6)
+	uint32_t vrf_id;
+#endif
+#if defined(INET) || defined(INET6)
+#if !defined(__Panda__)
+	struct mbuf *o_pak;
+#endif
+	sctp_route_t *ro = NULL;
+	struct udphdr *udp = NULL;
+#endif
+	uint8_t tos_value;
+#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+	struct socket *so = NULL;
+#endif
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+		SCTP_TCB_LOCK_ASSERT(stcb);
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
+		SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+		sctp_m_freem(m);
+		return (EFAULT);
+	}
+#if defined(INET) || defined(INET6)
+	if (stcb) {
+		vrf_id = stcb->asoc.vrf_id;
+	} else {
+		vrf_id = inp->def_vrf_id;
+	}
+#endif
+	/* fill in the HMAC digest for any AUTH chunk in the packet */
+	if ((auth != NULL) && (stcb != NULL)) {
+		sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
+	}
+
+	if (net) {
+		tos_value = net->dscp;
+	} else if (stcb) {
+		tos_value = stcb->asoc.default_dscp;
+	} else {
+		tos_value = inp->sctp_ep.default_dscp;
+	}
+
+	switch (to->sa_family) {
+#ifdef INET
+	case AF_INET:
+	{
+		struct ip *ip = NULL;
+		sctp_route_t iproute;
+		int len;
+
+		len = SCTP_MIN_V4_OVERHEAD;
+		if (port) {
+			len += sizeof(struct udphdr);
+		}
+		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
+		if (newm == NULL) {
+			sctp_m_freem(m);
+			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			return (ENOMEM);
+		}
+		SCTP_ALIGN_TO_END(newm, len);
+		SCTP_BUF_LEN(newm) = len;
+		SCTP_BUF_NEXT(newm) = m;
+		m = newm;
+#if defined(__FreeBSD__)
+		if (net != NULL) {
+			m->m_pkthdr.flowid = net->flowid;
+			M_HASHTYPE_SET(m, net->flowtype);
+		} else {
+			m->m_pkthdr.flowid = mflowid;
+			M_HASHTYPE_SET(m, mflowtype);
+ 		}
+#endif
+		packet_length = sctp_calculate_len(m);
+		ip = mtod(m, struct ip *);
+		ip->ip_v = IPVERSION;
+		ip->ip_hl = (sizeof(struct ip) >> 2);
+		if (tos_value == 0) {
+			/*
+			 * This means especially, that it is not set at the
+			 * SCTP layer. So use the value from the IP layer.
+			 */
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
+			tos_value = inp->ip_inp.inp.inp_ip_tos;
+#else
+			tos_value = inp->inp_ip_tos;
+#endif
+		}
+		tos_value &= 0xfc;
+		if (ecn_ok) {
+			tos_value |= sctp_get_ect(stcb);
+		}
+                if ((nofragment_flag) && (port == 0)) {
+#if defined(__FreeBSD__)
+#if __FreeBSD_version >= 1000000
+			ip->ip_off = htons(IP_DF);
+#else
+			ip->ip_off = IP_DF;
+#endif
+#elif defined(WITH_CONVERT_IP_OFF) || defined(__APPLE__) || defined(__Userspace__)
+			ip->ip_off = IP_DF;
+#else
+			ip->ip_off = htons(IP_DF);
+#endif
+		} else {
+#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
+			ip->ip_off = htons(0);
+#else
+			ip->ip_off = 0;
+#endif
+		}
+#if defined(__FreeBSD__)
+		/* FreeBSD has a function for ip_id's */
+		ip_fillid(ip);
+#elif defined(__APPLE__)
+#if RANDOM_IP_ID
+		ip->ip_id = ip_randomid();
+#else
+		ip->ip_id = htons(ip_id++);
+#endif
+#elif defined(__Userspace__)
+                ip->ip_id = htons(SCTP_IP_ID(inp)++);
+#else
+		ip->ip_id = SCTP_IP_ID(inp)++;
+#endif
+
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
+		ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
+#else
+		ip->ip_ttl = inp->inp_ip_ttl;
+#endif
+#if defined(__FreeBSD__) && __FreeBSD_version >= 1000000
+		ip->ip_len = htons(packet_length);
+#else
+		ip->ip_len = packet_length;
+#endif
+		ip->ip_tos = tos_value;
+		if (port) {
+			ip->ip_p = IPPROTO_UDP;
+		} else {
+			ip->ip_p = IPPROTO_SCTP;
+		}
+		ip->ip_sum = 0;
+		if (net == NULL) {
+			ro = &iproute;
+			memset(&iproute, 0, sizeof(iproute));
+#ifdef HAVE_SA_LEN
+			memcpy(&ro->ro_dst, to, to->sa_len);
+#else
+			memcpy(&ro->ro_dst, to, sizeof(struct sockaddr_in));
+#endif
+		} else {
+			ro = (sctp_route_t *)&net->ro;
+		}
+		/* Now the address selection part */
+		ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
+
+		/* call the routine to select the src address */
+		if (net && out_of_asoc_ok == 0) {
+			if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) {
+				sctp_free_ifa(net->ro._s_addr);
+				net->ro._s_addr = NULL;
+				net->src_addr_selected = 0;
+				if (ro->ro_rt) {
+					RTFREE(ro->ro_rt);
+					ro->ro_rt = NULL;
+				}
+			}
+			if (net->src_addr_selected == 0) {
+				/* Cache the source address */
+				net->ro._s_addr = sctp_source_address_selection(inp,stcb,
+										ro, net, 0,
+										vrf_id);
+				net->src_addr_selected = 1;
+			}
+			if (net->ro._s_addr == NULL) {
+				/* No route to host */
+				net->src_addr_selected = 0;
+				sctp_handle_no_route(stcb, net, so_locked);
+				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+				sctp_m_freem(m);
+				return (EHOSTUNREACH);
+			}
+			ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
+		} else {
+			if (over_addr == NULL) {
+				struct sctp_ifa *_lsrc;
+
+				_lsrc = sctp_source_address_selection(inp, stcb, ro,
+				                                      net,
+				                                      out_of_asoc_ok,
+				                                      vrf_id);
+				if (_lsrc == NULL) {
+					sctp_handle_no_route(stcb, net, so_locked);
+					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+					sctp_m_freem(m);
+					return (EHOSTUNREACH);
+				}
+				ip->ip_src = _lsrc->address.sin.sin_addr;
+				sctp_free_ifa(_lsrc);
+			} else {
+				ip->ip_src = over_addr->sin.sin_addr;
+				SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
+			}
+		}
+		if (port) {
+			if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
+				sctp_handle_no_route(stcb, net, so_locked);
+				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+				sctp_m_freem(m);
+				return (EHOSTUNREACH);
+			}
+			udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
+			udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+			udp->uh_dport = port;
+			udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
+#if !defined(__Windows__) && !defined(__Userspace__)
+#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
+			if (V_udp_cksum) {
+				udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+			} else {
+				udp->uh_sum = 0;
+			}
+#else
+			udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+#endif
+#else
+			udp->uh_sum = 0;
+#endif
+			sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
+		} else {
+			sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
+		}
+
+		sctphdr->src_port = src_port;
+		sctphdr->dest_port = dest_port;
+		sctphdr->v_tag = v_tag;
+		sctphdr->checksum = 0;
+
+		/*
+		 * If source address selection fails and we find no route
+		 * then the ip_output should fail as well with a
+		 * NO_ROUTE_TO_HOST type error. We probably should catch
+		 * that somewhere and abort the association right away
+		 * (assuming this is an INIT being sent).
+		 */
+		if (ro->ro_rt == NULL) {
+			/*
+			 * src addr selection failed to find a route (or
+			 * valid source addr), so we can't get there from
+			 * here (yet)!
+			 */
+			sctp_handle_no_route(stcb, net, so_locked);
+			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+			sctp_m_freem(m);
+			return (EHOSTUNREACH);
+		}
+		if (ro != &iproute) {
+			memcpy(&iproute, ro, sizeof(*ro));
+		}
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
+			(uint32_t) (ntohl(ip->ip_src.s_addr)));
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
+			(uint32_t)(ntohl(ip->ip_dst.s_addr)));
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
+			(void *)ro->ro_rt);
+
+		if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+			/* failed to prepend data, give up */
+			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			sctp_m_freem(m);
+			return (ENOMEM);
+		}
+		SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
+		if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#if !defined(__Windows__) && !defined(__Userspace__)
+#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
+			if (V_udp_cksum) {
+				SCTP_ENABLE_UDP_CSUM(o_pak);
+			}
+#else
+			SCTP_ENABLE_UDP_CSUM(o_pak);
+#endif
+#endif
+		} else {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+#if defined(__FreeBSD__) && __FreeBSD_version >= 800000
+			m->m_pkthdr.csum_flags = CSUM_SCTP;
+			m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+#else
+			if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
+			      (stcb) && (stcb->asoc.scope.loopback_scope))) {
+				sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip));
+				SCTP_STAT_INCR(sctps_sendswcrc);
+			} else {
+				SCTP_STAT_INCR(sctps_sendnocrc);
+			}
+#endif
+#endif
+		}
+#ifdef SCTP_PACKET_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+			sctp_packet_log(o_pak);
+#endif
+		/* send it out.  table id is taken from stcb */
+#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+			so = SCTP_INP_SO(inp);
+			SCTP_SOCKET_UNLOCK(so, 0);
+		}
+#endif
+		SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
+#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+			SCTP_SOCKET_LOCK(so, 0);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		}
+#endif
+		SCTP_STAT_INCR(sctps_sendpackets);
+		SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+		if (ret)
+			SCTP_STAT_INCR(sctps_senderrors);
+
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
+		if (net == NULL) {
+			/* free tempy routes */
+#if defined(__FreeBSD__) && __FreeBSD_version > 901000
+			RO_RTFREE(ro);
+#else
+			if (ro->ro_rt) {
+				RTFREE(ro->ro_rt);
+				ro->ro_rt = NULL;
+			}
+#endif
+		} else {
+			/* PMTU check versus smallest asoc MTU goes here */
+			if ((ro->ro_rt != NULL) &&
+			    (net->ro._s_addr)) {
+				uint32_t mtu;
+				mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
+				if (net->port) {
+					mtu -= sizeof(struct udphdr);
+				}
+				if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
+					sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
+					net->mtu = mtu;
+				}
+			} else if (ro->ro_rt == NULL) {
+				/* route was freed */
+				if (net->ro._s_addr &&
+				    net->src_addr_selected) {
+					sctp_free_ifa(net->ro._s_addr);
+					net->ro._s_addr = NULL;
+				}
+				net->src_addr_selected = 0;
+			}
+		}
+		return (ret);
+	}
+#endif
+#ifdef INET6
+	case AF_INET6:
+	{
+		uint32_t flowlabel, flowinfo;
+		struct ip6_hdr *ip6h;
+		struct route_in6 ip6route;
+#if !(defined(__Panda__) || defined(__Userspace__))
+		struct ifnet *ifp;
+#endif
+		struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
+		int prev_scope = 0;
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		struct sockaddr_in6 lsa6_storage;
+		int error;
+#endif
+		u_short prev_port = 0;
+		int len;
+
+		if (net) {
+			flowlabel = net->flowlabel;
+		} else if (stcb) {
+			flowlabel = stcb->asoc.default_flowlabel;
+		} else {
+			flowlabel = inp->sctp_ep.default_flowlabel;
+		}
+		if (flowlabel == 0) {
+			/*
+			 * This means especially, that it is not set at the
+			 * SCTP layer. So use the value from the IP layer.
+			 */
+#if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION))
+			flowlabel = ntohl(inp->ip_inp.inp.inp_flow);
+#else
+			flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
+#endif
+		}
+		flowlabel &= 0x000fffff;
+		len = SCTP_MIN_OVERHEAD;
+		if (port) {
+			len += sizeof(struct udphdr);
+		}
+		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
+		if (newm == NULL) {
+			sctp_m_freem(m);
+			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			return (ENOMEM);
+		}
+		SCTP_ALIGN_TO_END(newm, len);
+		SCTP_BUF_LEN(newm) = len;
+		SCTP_BUF_NEXT(newm) = m;
+		m = newm;
+#if defined(__FreeBSD__)
+		if (net != NULL) {
+			m->m_pkthdr.flowid = net->flowid;
+			M_HASHTYPE_SET(m, net->flowtype);
+		} else {
+			m->m_pkthdr.flowid = mflowid;
+			M_HASHTYPE_SET(m, mflowtype);
+ 		}
+#endif
+		packet_length = sctp_calculate_len(m);
+
+		ip6h = mtod(m, struct ip6_hdr *);
+		/* protect *sin6 from overwrite */
+		sin6 = (struct sockaddr_in6 *)to;
+		tmp = *sin6;
+		sin6 = &tmp;
+
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		/* KAME hack: embed scopeid */
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
+		if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
+#else
+		if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
+#endif
+#elif defined(SCTP_KAME)
+		if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
+#else
+		if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
+#endif
+		{
+			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			return (EINVAL);
+		}
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+		if (net == NULL) {
+			memset(&ip6route, 0, sizeof(ip6route));
+			ro = (sctp_route_t *)&ip6route;
+#ifdef HAVE_SIN6_LEN
+			memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
+#else
+			memcpy(&ro->ro_dst, sin6, sizeof(struct sockaddr_in6));
+#endif
+		} else {
+			ro = (sctp_route_t *)&net->ro;
+		}
+		/*
+		 * We assume here that inp_flow is in host byte order within
+		 * the TCB!
+		 */
+		if (tos_value == 0) {
+			/*
+			 * This means especially, that it is not set at the
+			 * SCTP layer. So use the value from the IP layer.
+			 */
+#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Panda__) || defined(__Windows__) || defined(__Userspace__)
+#if defined(__APPLE__) && (!defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION))
+			tos_value = (ntohl(inp->ip_inp.inp.inp_flow) >> 20) & 0xff;
+#else
+			tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
+#endif
+#endif
+		}
+		tos_value &= 0xfc;
+		if (ecn_ok) {
+			tos_value |= sctp_get_ect(stcb);
+		}
+		flowinfo = 0x06;
+		flowinfo <<= 8;
+		flowinfo |= tos_value;
+		flowinfo <<= 20;
+		flowinfo |= flowlabel;
+		ip6h->ip6_flow = htonl(flowinfo);
+		if (port) {
+			ip6h->ip6_nxt = IPPROTO_UDP;
+		} else {
+			ip6h->ip6_nxt = IPPROTO_SCTP;
+		}
+		ip6h->ip6_plen = (uint16_t)(packet_length - sizeof(struct ip6_hdr));
+		ip6h->ip6_dst = sin6->sin6_addr;
+
+		/*
+		 * Add SRC address selection here: we can only reuse to a
+		 * limited degree the kame src-addr-sel, since we can try
+		 * their selection but it may not be bound.
+		 */
+		bzero(&lsa6_tmp, sizeof(lsa6_tmp));
+		lsa6_tmp.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+		lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
+#endif
+		lsa6 = &lsa6_tmp;
+		if (net && out_of_asoc_ok == 0) {
+			if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED|SCTP_ADDR_IFA_UNUSEABLE))) {
+				sctp_free_ifa(net->ro._s_addr);
+				net->ro._s_addr = NULL;
+				net->src_addr_selected = 0;
+				if (ro->ro_rt) {
+					RTFREE(ro->ro_rt);
+					ro->ro_rt = NULL;
+				}
+			}
+			if (net->src_addr_selected == 0) {
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+				sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+				/* KAME hack: embed scopeid */
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
+				if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
+#else
+				if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
+#endif
+#elif defined(SCTP_KAME)
+				if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
+#else
+				if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
+#endif
+				{
+					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+					return (EINVAL);
+				}
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+				/* Cache the source address */
+				net->ro._s_addr = sctp_source_address_selection(inp,
+										stcb,
+										ro,
+										net,
+										0,
+										vrf_id);
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+#ifdef SCTP_KAME
+				(void)sa6_recoverscope(sin6);
+#else
+				(void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
+#endif	/* SCTP_KAME */
+#endif	/* SCTP_EMBEDDED_V6_SCOPE */
+				net->src_addr_selected = 1;
+			}
+			if (net->ro._s_addr == NULL) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
+				net->src_addr_selected = 0;
+				sctp_handle_no_route(stcb, net, so_locked);
+				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+				sctp_m_freem(m);
+				return (EHOSTUNREACH);
+			}
+			lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
+		} else {
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+			sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
+			/* KAME hack: embed scopeid */
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
+			if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL) != 0)
+#else
+			if (in6_embedscope(&sin6->sin6_addr, sin6, NULL, NULL, NULL) != 0)
+#endif
+#elif defined(SCTP_KAME)
+			if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0)
+#else
+			if (in6_embedscope(&sin6->sin6_addr, sin6) != 0)
+#endif
+			  {
+				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+				return (EINVAL);
+			  }
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+			if (over_addr == NULL) {
+				struct sctp_ifa *_lsrc;
+
+				_lsrc = sctp_source_address_selection(inp, stcb, ro,
+				                                      net,
+				                                      out_of_asoc_ok,
+				                                      vrf_id);
+				if (_lsrc == NULL) {
+					sctp_handle_no_route(stcb, net, so_locked);
+					SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+					sctp_m_freem(m);
+					return (EHOSTUNREACH);
+				}
+				lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
+				sctp_free_ifa(_lsrc);
+			} else {
+				lsa6->sin6_addr = over_addr->sin6.sin6_addr;
+				SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
+			}
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+#ifdef SCTP_KAME
+			(void)sa6_recoverscope(sin6);
+#else
+			(void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL);
+#endif	/* SCTP_KAME */
+#endif	/* SCTP_EMBEDDED_V6_SCOPE */
+		}
+		lsa6->sin6_port = inp->sctp_lport;
+
+		if (ro->ro_rt == NULL) {
+			/*
+			 * src addr selection failed to find a route (or
+			 * valid source addr), so we can't get there from
+			 * here!
+			 */
+			sctp_handle_no_route(stcb, net, so_locked);
+			SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+			sctp_m_freem(m);
+			return (EHOSTUNREACH);
+		}
+#ifndef SCOPEDROUTING
+#ifdef SCTP_EMBEDDED_V6_SCOPE
+		/*
+		 * XXX: sa6 may not have a valid sin6_scope_id in the
+		 * non-SCOPEDROUTING case.
+		 */
+		bzero(&lsa6_storage, sizeof(lsa6_storage));
+		lsa6_storage.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+		lsa6_storage.sin6_len = sizeof(lsa6_storage);
+#endif
+#ifdef SCTP_KAME
+		lsa6_storage.sin6_addr = lsa6->sin6_addr;
+		if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
+#else
+		if ((error = in6_recoverscope(&lsa6_storage, &lsa6->sin6_addr,
+		    NULL)) != 0) {
+#endif				/* SCTP_KAME */
+			SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
+			sctp_m_freem(m);
+			return (error);
+		}
+		/* XXX */
+		lsa6_storage.sin6_addr = lsa6->sin6_addr;
+		lsa6_storage.sin6_port = inp->sctp_lport;
+		lsa6 = &lsa6_storage;
+#endif /* SCTP_EMBEDDED_V6_SCOPE */
+#endif /* SCOPEDROUTING */
+		ip6h->ip6_src = lsa6->sin6_addr;
+
+		if (port) {
+			if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
+				sctp_handle_no_route(stcb, net, so_locked);
+				SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
+				sctp_m_freem(m);
+				return (EHOSTUNREACH);
+			}
+			udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
+			udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+			udp->uh_dport = port;
+			udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
+			udp->uh_sum = 0;
+			sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
+		} else {
+			sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
+		}
+
+		sctphdr->src_port = src_port;
+		sctphdr->dest_port = dest_port;
+		sctphdr->v_tag = v_tag;
+		sctphdr->checksum = 0;
+
+		/*
+		 * We set the hop limit now since there is a good chance
+		 * that our ro pointer is now filled
+		 */
+		ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
+#if !(defined(__Panda__) || defined(__Userspace__))
+		ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
+#endif
+
+#ifdef SCTP_DEBUG
+		/* Copy to be sure something bad is not happening */
+		sin6->sin6_addr = ip6h->ip6_dst;
+		lsa6->sin6_addr = ip6h->ip6_src;
+#endif
+
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
+		if (net) {
+			sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
+			/* preserve the port and scope for link local send */
+			prev_scope = sin6->sin6_scope_id;
+			prev_port = sin6->sin6_port;
+		}
+
+		if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+			/* failed to prepend data, give up */
+			sctp_m_freem(m);
+			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			return (ENOMEM);
+		}
+		SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
+		if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#if defined(__Windows__)
+			udp->uh_sum = 0;
+#elif !defined(__Userspace__)
+			if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
+				udp->uh_sum = 0xffff;
+			}
+#endif
+		} else {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+#if defined(__FreeBSD__) && __FreeBSD_version >= 800000
+#if __FreeBSD_version < 900000
+			sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#else
+#if __FreeBSD_version > 901000
+			m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
+#else
+			m->m_pkthdr.csum_flags = CSUM_SCTP;
+#endif
+			m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+#endif
+#else
+			if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
+			      (stcb) && (stcb->asoc.scope.loopback_scope))) {
+				sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr));
+				SCTP_STAT_INCR(sctps_sendswcrc);
+			} else {
+				SCTP_STAT_INCR(sctps_sendnocrc);
+			}
+#endif
+#endif
+		}
+		/* send it out. table id is taken from stcb */
+#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+			so = SCTP_INP_SO(inp);
+			SCTP_SOCKET_UNLOCK(so, 0);
+		}
+#endif
+#ifdef SCTP_PACKET_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
+			sctp_packet_log(o_pak);
+#endif
+#if !(defined(__Panda__) || defined(__Userspace__))
+		SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
+#else
+		SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, NULL, stcb, vrf_id);
+#endif
+#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
+		if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+			SCTP_SOCKET_LOCK(so, 0);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+		}
+#endif
+		if (net) {
+			/* for link local this must be done */
+			sin6->sin6_scope_id = prev_scope;
+			sin6->sin6_port = prev_port;
+		}
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
+		SCTP_STAT_INCR(sctps_sendpackets);
+		SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+		if (ret) {
+			SCTP_STAT_INCR(sctps_senderrors);
+		}
+		if (net == NULL) {
+			/* Now if we had a temp route free it */
+#if defined(__FreeBSD__) && __FreeBSD_version > 901000
+			RO_RTFREE(ro);
+#else
+			if (ro->ro_rt) {
+				RTFREE(ro->ro_rt);
+				ro->ro_rt = NULL;
+			}
+#endif
+		} else {
+			/* PMTU check versus smallest asoc MTU goes here */
+			if (ro->ro_rt == NULL) {
+				/* Route was freed */
+				if (net->ro._s_addr &&
+				    net->src_addr_selected) {
+					sctp_free_ifa(net->ro._s_addr);
+					net->ro._s_addr = NULL;
+				}
+				net->src_addr_selected = 0;
+			}
+			if ((ro->ro_rt != NULL) &&
+			    (net->ro._s_addr)) {
+				uint32_t mtu;
+				mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
+				if (mtu &&
+				    (stcb->asoc.smallest_mtu > mtu)) {
+					sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
+					net->mtu = mtu;
+					if (net->port) {
+						net->mtu -= sizeof(struct udphdr);
+					}
+				}
+			}
+#if !defined(__Panda__) && !defined(__Userspace__)
+			else if (ifp) {
+#if defined(__Windows__)
+#define ND_IFINFO(ifp)	(ifp)
+#define linkmtu		if_mtu
+#endif
+				if (ND_IFINFO(ifp)->linkmtu &&
+				    (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
+					sctp_mtu_size_reset(inp,
+					    &stcb->asoc,
+					    ND_IFINFO(ifp)->linkmtu);
+				}
+			}
+#endif
+		}
+		return (ret);
+	}
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+	{
+		char *buffer;
+		struct sockaddr_conn *sconn;
+		int len;
+
+		sconn = (struct sockaddr_conn *)to;
+		len = sizeof(struct sctphdr);
+		newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
+		if (newm == NULL) {
+			sctp_m_freem(m);
+			SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			return (ENOMEM);
+		}
+		SCTP_ALIGN_TO_END(newm, len);
+		SCTP_BUF_LEN(newm) = len;
+		SCTP_BUF_NEXT(newm) = m;
+		m = newm;
+		packet_length = sctp_calculate_len(m);
+		sctphdr = mtod(m, struct sctphdr *);
+		sctphdr->src_port = src_port;
+		sctphdr->dest_port = dest_port;
+		sctphdr->v_tag = v_tag;
+		sctphdr->checksum = 0;
+#if defined(SCTP_WITH_NO_CSUM)
+		SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+		if (SCTP_BASE_VAR(crc32c_offloaded) == 0) {
+			sctphdr->checksum = sctp_calculate_cksum(m, 0);
+			SCTP_STAT_INCR(sctps_sendswcrc);
+		} else {
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+		}
+#endif
+		if (tos_value == 0) {
+			tos_value = inp->ip_inp.inp.inp_ip_tos;
+		}
+		tos_value &= 0xfc;
+		if (ecn_ok) {
+			tos_value |= sctp_get_ect(stcb);
+		}
+		/* Don't alloc/free for each packet */
+		if ((buffer = malloc(packet_length)) != NULL) {
+			m_copydata(m, 0, packet_length, buffer);
+			ret = SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, packet_length, tos_value, nofragment_flag);
+			free(buffer);
+		} else {
+			ret = ENOMEM;
+		}
+		sctp_m_freem(m);
+		return (ret);
+	}
+#endif
+	default:
+		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
+		        ((struct sockaddr *)to)->sa_family);
+		sctp_m_freem(m);
+		SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+		return (EFAULT);
+	}
+}
+
+
+void
+sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+    SCTP_UNUSED
+#endif
+    )
+{
+	struct mbuf *m, *m_last;
+	struct sctp_nets *net;
+	struct sctp_init_chunk *init;
+	struct sctp_supported_addr_param *sup_addr;
+	struct sctp_adaptation_layer_indication *ali;
+	struct sctp_supported_chunk_types_param *pr_supported;
+	struct sctp_paramhdr *ph;
+	int cnt_inits_to = 0;
+	int error;
+	uint16_t num_ext, chunk_len, padding_len, parameter_len;
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	/* INIT's always go to the primary (and usually ONLY address) */
+	net = stcb->asoc.primary_destination;
+	if (net == NULL) {
+		net = TAILQ_FIRST(&stcb->asoc.nets);
+		if (net == NULL) {
+			/* TSNH */
+			return;
+		}
+		/* we confirm any address we send an INIT to */
+		net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
+		(void)sctp_set_primary_addr(stcb, NULL, net);
+	} else {
+		/* we confirm any address we send an INIT to */
+		net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
+#ifdef INET6
+	if (net->ro._l_addr.sa.sa_family == AF_INET6) {
+		/*
+		 * special hook, if we are sending to link local it will not
+		 * show up in our private address count.
+		 */
+		if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
+			cnt_inits_to = 1;
+	}
+#endif
+	if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+		/* This case should not happen */
+		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
+		return;
+	}
+	/* start the INIT timer */
+	sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
+
+	m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
+	if (m == NULL) {
+		/* No memory, INIT timer will re-attempt. */
+		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
+		return;
+	}
+	chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
+	padding_len = 0;
+	/* Now lets put the chunk header in place */
+	init = mtod(m, struct sctp_init_chunk *);
+	/* now the chunk header */
+	init->ch.chunk_type = SCTP_INITIATION;
+	init->ch.chunk_flags = 0;
+	/* fill in later from mbuf we build */
+	init->ch.chunk_length = 0;
+	/* place in my tag */
+	init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
+	/* set up some of the credits. */
+	init->init.a_rwnd = htonl(max(inp->sctp_socket?SCTP_SB_LIMIT_RCV(inp->sctp_socket):0,
+	                              SCTP_MINIMAL_RWND));
+	init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
+	init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
+	init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
+
+	/* Adaptation layer indication parameter */
+	if (inp->sctp_ep.adaptation_layer_indicator_provided) {
+		parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
+		ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t) + chunk_len);
+		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+		ali->ph.param_length = htons(parameter_len);
+		ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
+		chunk_len += parameter_len;
+	}
+
+	/* ECN parameter */
+	if (stcb->asoc.ecn_supported == 1) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_ECN_CAPABLE);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* PR-SCTP supported parameter */
+	if (stcb->asoc.prsctp_supported == 1) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* Add NAT friendly parameter. */
+	if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* And now tell the peer which extensions we support */
+	num_ext = 0;
+	pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + chunk_len);
+	if (stcb->asoc.prsctp_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
+		if (stcb->asoc.idata_supported) {
+			pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
+		}
+	}
+	if (stcb->asoc.auth_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
+	}
+	if (stcb->asoc.asconf_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
+		pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
+	}
+	if (stcb->asoc.reconfig_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
+	}
+	if (stcb->asoc.idata_supported) {
+		pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
+	}
+	if (stcb->asoc.nrsack_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
+	}
+	if (stcb->asoc.pktdrop_supported == 1) {
+		pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
+	}
+	if (num_ext > 0) {
+		parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
+		pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
+		pr_supported->ph.param_length = htons(parameter_len);
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		chunk_len += parameter_len;
+	}
+	/* add authentication parameters */
+	if (stcb->asoc.auth_supported) {
+		/* attach RANDOM parameter, if available */
+		if (stcb->asoc.authinfo.random != NULL) {
+			struct sctp_auth_random *randp;
+
+			if (padding_len > 0) {
+				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+				chunk_len += padding_len;
+				padding_len = 0;
+			}
+			randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + chunk_len);
+			parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
+			/* random key already contains the header */
+			memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
+			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+			chunk_len += parameter_len;
+		}
+		/* add HMAC_ALGO parameter */
+		if (stcb->asoc.local_hmacs != NULL) {
+			struct sctp_auth_hmac_algo *hmacs;
+
+			if (padding_len > 0) {
+				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+				chunk_len += padding_len;
+				padding_len = 0;
+			}
+			hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + chunk_len);
+			parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
+			                           stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
+			hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
+			hmacs->ph.param_length = htons(parameter_len);
+			sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
+			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+			chunk_len += parameter_len;
+		}
+		/* add CHUNKS parameter */
+		if (stcb->asoc.local_auth_chunks != NULL) {
+			struct sctp_auth_chunk_list *chunks;
+
+			if (padding_len > 0) {
+				memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+				chunk_len += padding_len;
+				padding_len = 0;
+			}
+			chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + chunk_len);
+			parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
+			                           sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
+			chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
+			chunks->ph.param_length = htons(parameter_len);
+			sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
+			padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+			chunk_len += parameter_len;
+		}
+	}
+
+	/* now any cookie time extensions */
+	if (stcb->asoc.cookie_preserve_req) {
+		struct sctp_cookie_perserve_param *cookie_preserve;
+
+		if (padding_len > 0) {
+			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+			chunk_len += padding_len;
+			padding_len = 0;
+		}
+		parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
+		cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t) + chunk_len);
+		cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
+		cookie_preserve->ph.param_length = htons(parameter_len);
+		cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
+		stcb->asoc.cookie_preserve_req = 0;
+		chunk_len += parameter_len;
+	}
+
+	if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
+		uint8_t i;
+
+		if (padding_len > 0) {
+			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+			chunk_len += padding_len;
+			padding_len = 0;
+		}
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		if (stcb->asoc.scope.ipv4_addr_legal) {
+			parameter_len += (uint16_t)sizeof(uint16_t);
+		}
+		if (stcb->asoc.scope.ipv6_addr_legal) {
+			parameter_len += (uint16_t)sizeof(uint16_t);
+		}
+		sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t) + chunk_len);
+		sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
+		sup_addr->ph.param_length = htons(parameter_len);
+		i = 0;
+		if (stcb->asoc.scope.ipv4_addr_legal) {
+			sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
+		}
+		if (stcb->asoc.scope.ipv6_addr_legal) {
+			sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
+		}
+		padding_len = 4 - 2 * i;
+		chunk_len += parameter_len;
+	}
+
+	SCTP_BUF_LEN(m) = chunk_len;
+	/* now the addresses */
+	/* To optimize this we could put the scoping stuff
+	 * into a structure and remove the individual uint8's from
+	 * the assoc structure. Then we could just sifa in the
+	 * address within the stcb. But for now this is a quick
+	 * hack to get the address stuff teased apart.
+	 */
+	m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
+	                                    m, cnt_inits_to,
+	                                    &padding_len, &chunk_len);
+
+	init->ch.chunk_length = htons(chunk_len);
+	if (padding_len > 0) {
+		if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
+			sctp_m_freem(m);
+			return;
+		}
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
+	if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+	                                        (struct sockaddr *)&net->ro._l_addr,
+	                                        m, 0, NULL, 0, 0, 0, 0,
+	                                        inp->sctp_lport, stcb->rport, htonl(0),
+	                                        net->port, NULL,
+#if defined(__FreeBSD__)
+	                                        0, 0,
+#endif
+	                                        so_locked))) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
+		if (error == ENOBUFS) {
+			stcb->asoc.ifp_had_enobuf = 1;
+			SCTP_STAT_INCR(sctps_lowlevelerr);
+		}
+	} else {
+		stcb->asoc.ifp_had_enobuf = 0;
+	}
+	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+	(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
+}
+
+struct mbuf *
+sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
+	int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
+{
+	/*
+	 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
+	 * being equal to the beginning of the params i.e. (iphlen +
+	 * sizeof(struct sctp_init_msg) parse through the parameters to the
+	 * end of the mbuf verifying that all parameters are known.
+	 *
+	 * For unknown parameters build and return a mbuf with
+	 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
+	 * processing this chunk stop, and set *abort_processing to 1.
+	 *
+	 * By having param_offset be pre-set to where parameters begin it is
+	 * hoped that this routine may be reused in the future by new
+	 * features.
+	 */
+	struct sctp_paramhdr *phdr, params;
+
+	struct mbuf *mat, *op_err;
+	char tempbuf[SCTP_PARAM_BUFFER_SIZE];
+	int at, limit, pad_needed;
+	uint16_t ptype, plen, padded_size;
+	int err_at;
+
+	*abort_processing = 0;
+	mat = in_initpkt;
+	err_at = 0;
+	limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
+	at = param_offset;
+	op_err = NULL;
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
+	phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
+	while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
+		ptype = ntohs(phdr->param_type);
+		plen = ntohs(phdr->param_length);
+		if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
+			/* wacked parameter */
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
+			goto invalid_size;
+		}
+		limit -= SCTP_SIZE32(plen);
+		/*-
+		 * All parameters for all chunks that we know/understand are
+		 * listed here. We process them other places and make
+		 * appropriate stop actions per the upper bits. However this
+		 * is the generic routine processor's can call to get back
+		 * an operr.. to either incorporate (init-ack) or send.
+		 */
+		padded_size = SCTP_SIZE32(plen);
+		switch (ptype) {
+			/* Param's with variable size */
+		case SCTP_HEARTBEAT_INFO:
+		case SCTP_STATE_COOKIE:
+		case SCTP_UNRECOG_PARAM:
+		case SCTP_ERROR_CAUSE_IND:
+			/* ok skip fwd */
+			at += padded_size;
+			break;
+			/* Param's with variable size within a range */
+		case SCTP_CHUNK_LIST:
+		case SCTP_SUPPORTED_CHUNK_EXT:
+			if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_SUPPORTED_ADDRTYPE:
+			if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_RANDOM:
+			if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_SET_PRIM_ADDR:
+		case SCTP_DEL_IP_ADDRESS:
+		case SCTP_ADD_IP_ADDRESS:
+			if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
+			    (padded_size != sizeof(struct sctp_asconf_addr_param))) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+			/* Param's with a fixed size */
+		case SCTP_IPV4_ADDRESS:
+			if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_IPV6_ADDRESS:
+			if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_COOKIE_PRESERVE:
+			if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_HAS_NAT_SUPPORT:
+			*nat_friendly = 1;
+			/* fall through */
+		case SCTP_PRSCTP_SUPPORTED:
+			if (padded_size != sizeof(struct sctp_paramhdr)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_ECN_CAPABLE:
+			if (padded_size != sizeof(struct sctp_paramhdr)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_ULP_ADAPTATION:
+			if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_SUCCESS_REPORT:
+			if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
+				goto invalid_size;
+			}
+			at += padded_size;
+			break;
+		case SCTP_HOSTNAME_ADDRESS:
+		{
+			/* We can NOT handle HOST NAME addresses!! */
+			int l_len;
+
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
+			*abort_processing = 1;
+			if (op_err == NULL) {
+				/* Ok need to try to get a mbuf */
+#ifdef INET6
+				l_len = SCTP_MIN_OVERHEAD;
+#else
+				l_len = SCTP_MIN_V4_OVERHEAD;
+#endif
+				l_len += sizeof(struct sctp_chunkhdr);
+				l_len += plen;
+				l_len += sizeof(struct sctp_paramhdr);
+				op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
+				if (op_err) {
+					SCTP_BUF_LEN(op_err) = 0;
+					/*
+					 * pre-reserve space for ip and sctp
+					 * header  and chunk hdr
+					 */
+#ifdef INET6
+					SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+					SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+					SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+					SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+				}
+			}
+			if (op_err) {
+				/* If we have space */
+				struct sctp_paramhdr s;
+
+				if (err_at % 4) {
+					uint32_t cpthis = 0;
+
+					pad_needed = 4 - (err_at % 4);
+					m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+					err_at += pad_needed;
+				}
+				s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
+				s.param_length = htons(sizeof(s) + plen);
+				m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+				err_at += sizeof(s);
+				phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen));
+				if (phdr == NULL) {
+					sctp_m_freem(op_err);
+					/*
+					 * we are out of memory but we still
+					 * need to have a look at what to do
+					 * (the system is in trouble
+					 * though).
+					 */
+					return (NULL);
+				}
+				m_copyback(op_err, err_at, plen, (caddr_t)phdr);
+			}
+			return (op_err);
+			break;
+		}
+		default:
+			/*
+			 * we do not recognize the parameter figure out what
+			 * we do.
+			 */
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
+			if ((ptype & 0x4000) == 0x4000) {
+				/* Report bit is set?? */
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
+				if (op_err == NULL) {
+					int l_len;
+					/* Ok need to try to get an mbuf */
+#ifdef INET6
+					l_len = SCTP_MIN_OVERHEAD;
+#else
+					l_len = SCTP_MIN_V4_OVERHEAD;
+#endif
+					l_len += sizeof(struct sctp_chunkhdr);
+					l_len += plen;
+					l_len += sizeof(struct sctp_paramhdr);
+					op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
+					if (op_err) {
+						SCTP_BUF_LEN(op_err) = 0;
+#ifdef INET6
+						SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+						SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+						SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+						SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+					}
+				}
+				if (op_err) {
+					/* If we have space */
+					struct sctp_paramhdr s;
+
+					if (err_at % 4) {
+						uint32_t cpthis = 0;
+
+						pad_needed = 4 - (err_at % 4);
+						m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+						err_at += pad_needed;
+					}
+					s.param_type = htons(SCTP_UNRECOG_PARAM);
+					s.param_length = htons(sizeof(s) + plen);
+					m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+					err_at += sizeof(s);
+					if (plen > sizeof(tempbuf)) {
+						plen = sizeof(tempbuf);
+					}
+					phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf),plen));
+					if (phdr == NULL) {
+						sctp_m_freem(op_err);
+						/*
+						 * we are out of memory but
+						 * we still need to have a
+						 * look at what to do (the
+						 * system is in trouble
+						 * though).
+						 */
+						op_err = NULL;
+						goto more_processing;
+					}
+					m_copyback(op_err, err_at, plen, (caddr_t)phdr);
+					err_at += plen;
+				}
+			}
+		more_processing:
+			if ((ptype & 0x8000) == 0x0000) {
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
+				return (op_err);
+			} else {
+				/* skip this chunk and continue processing */
+				SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
+				at += SCTP_SIZE32(plen);
+			}
+			break;
+
+		}
+		phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
+	}
+	return (op_err);
+ invalid_size:
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
+	*abort_processing = 1;
+	if ((op_err == NULL) && phdr) {
+		int l_len;
+#ifdef INET6
+		l_len = SCTP_MIN_OVERHEAD;
+#else
+		l_len = SCTP_MIN_V4_OVERHEAD;
+#endif
+		l_len += sizeof(struct sctp_chunkhdr);
+		l_len += (2 * sizeof(struct sctp_paramhdr));
+		op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
+		if (op_err) {
+			SCTP_BUF_LEN(op_err) = 0;
+#ifdef INET6
+			SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
+#else
+			SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
+#endif
+			SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
+			SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
+		}
+	}
+	if ((op_err) && phdr) {
+		struct sctp_paramhdr s;
+
+		if (err_at % 4) {
+			uint32_t cpthis = 0;
+
+			pad_needed = 4 - (err_at % 4);
+			m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
+			err_at += pad_needed;
+		}
+		s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
+		s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
+		m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
+		err_at += sizeof(s);
+		/* Only copy back the p-hdr that caused the issue */
+		m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
+	}
+	return (op_err);
+}
+
+static int
+sctp_are_there_new_addresses(struct sctp_association *asoc,
+    struct mbuf *in_initpkt, int offset, struct sockaddr *src)
+{
+	/*
+	 * Given a INIT packet, look through the packet to verify that there
+	 * are NO new addresses. As we go through the parameters add reports
+	 * of any un-understood parameters that require an error.  Also we
+	 * must return (1) to drop the packet if we see a un-understood
+	 * parameter that tells us to drop the chunk.
+	 */
+	struct sockaddr *sa_touse;
+	struct sockaddr *sa;
+	struct sctp_paramhdr *phdr, params;
+	uint16_t ptype, plen;
+	uint8_t fnd;
+	struct sctp_nets *net;
+	int check_src;
+#ifdef INET
+	struct sockaddr_in sin4, *sa4;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 sin6, *sa6;
+#endif
+#if defined(__Userspace__)
+	struct sockaddr_conn *sac;
+#endif
+
+#ifdef INET
+	memset(&sin4, 0, sizeof(sin4));
+	sin4.sin_family = AF_INET;
+#ifdef HAVE_SIN_LEN
+	sin4.sin_len = sizeof(sin4);
+#endif
+#endif
+#ifdef INET6
+	memset(&sin6, 0, sizeof(sin6));
+	sin6.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+	sin6.sin6_len = sizeof(sin6);
+#endif
+#endif
+	/* First what about the src address of the pkt ? */
+	check_src = 0;
+	switch (src->sa_family) {
+#ifdef INET
+	case AF_INET:
+		if (asoc->scope.ipv4_addr_legal) {
+			check_src = 1;
+		}
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		if (asoc->scope.ipv6_addr_legal) {
+			check_src = 1;
+		}
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		if (asoc->scope.conn_addr_legal) {
+			check_src = 1;
+		}
+		break;
+#endif
+	default:
+		/* TSNH */
+		break;
+	}
+	if (check_src) {
+		fnd = 0;
+		TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+			sa = (struct sockaddr *)&net->ro._l_addr;
+			if (sa->sa_family == src->sa_family) {
+#ifdef INET
+				if (sa->sa_family == AF_INET) {
+					struct sockaddr_in *src4;
+
+					sa4 = (struct sockaddr_in *)sa;
+					src4 = (struct sockaddr_in *)src;
+					if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
+						fnd = 1;
+						break;
+					}
+				}
+#endif
+#ifdef INET6
+				if (sa->sa_family == AF_INET6) {
+					struct sockaddr_in6 *src6;
+
+					sa6 = (struct sockaddr_in6 *)sa;
+					src6 = (struct sockaddr_in6 *)src;
+					if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
+						fnd = 1;
+						break;
+					}
+				}
+#endif
+#if defined(__Userspace__)
+				if (sa->sa_family == AF_CONN) {
+					struct sockaddr_conn *srcc;
+
+					sac = (struct sockaddr_conn *)sa;
+					srcc = (struct sockaddr_conn *)src;
+					if (sac->sconn_addr == srcc->sconn_addr) {
+						fnd = 1;
+						break;
+					}
+				}
+#endif
+			}
+		}
+		if (fnd == 0) {
+			/* New address added! no need to look further. */
+			return (1);
+		}
+	}
+	/* Ok so far lets munge through the rest of the packet */
+	offset += sizeof(struct sctp_init_chunk);
+	phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
+	while (phdr) {
+		sa_touse = NULL;
+		ptype = ntohs(phdr->param_type);
+		plen = ntohs(phdr->param_length);
+		switch (ptype) {
+#ifdef INET
+		case SCTP_IPV4_ADDRESS:
+		{
+			struct sctp_ipv4addr_param *p4, p4_buf;
+
+			phdr = sctp_get_next_param(in_initpkt, offset,
+			    (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
+			if (plen != sizeof(struct sctp_ipv4addr_param) ||
+			    phdr == NULL) {
+				return (1);
+			}
+			if (asoc->scope.ipv4_addr_legal) {
+				p4 = (struct sctp_ipv4addr_param *)phdr;
+				sin4.sin_addr.s_addr = p4->addr;
+				sa_touse = (struct sockaddr *)&sin4;
+			}
+			break;
+		}
+#endif
+#ifdef INET6
+		case SCTP_IPV6_ADDRESS:
+		{
+			struct sctp_ipv6addr_param *p6, p6_buf;
+
+			phdr = sctp_get_next_param(in_initpkt, offset,
+			    (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
+			if (plen != sizeof(struct sctp_ipv6addr_param) ||
+			    phdr == NULL) {
+				return (1);
+			}
+			if (asoc->scope.ipv6_addr_legal) {
+				p6 = (struct sctp_ipv6addr_param *)phdr;
+				memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
+				       sizeof(p6->addr));
+				sa_touse = (struct sockaddr *)&sin6;
+			}
+			break;
+		}
+#endif
+		default:
+			sa_touse = NULL;
+			break;
+		}
+		if (sa_touse) {
+			/* ok, sa_touse points to one to check */
+			fnd = 0;
+			TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+				sa = (struct sockaddr *)&net->ro._l_addr;
+				if (sa->sa_family != sa_touse->sa_family) {
+					continue;
+				}
+#ifdef INET
+				if (sa->sa_family == AF_INET) {
+					sa4 = (struct sockaddr_in *)sa;
+					if (sa4->sin_addr.s_addr ==
+					    sin4.sin_addr.s_addr) {
+						fnd = 1;
+						break;
+					}
+				}
+#endif
+#ifdef INET6
+				if (sa->sa_family == AF_INET6) {
+					sa6 = (struct sockaddr_in6 *)sa;
+					if (SCTP6_ARE_ADDR_EQUAL(
+					    sa6, &sin6)) {
+						fnd = 1;
+						break;
+					}
+				}
+#endif
+			}
+			if (!fnd) {
+				/* New addr added! no need to look further */
+				return (1);
+			}
+		}
+		offset += SCTP_SIZE32(plen);
+		phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
+	}
+	return (0);
+}
+
+/*
+ * Given a MBUF chain that was sent into us containing an INIT. Build a
+ * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
+ * a pullup to include IPv6/4header, SCTP header and initial part of INIT
+ * message (i.e. the struct sctp_init_msg).
+ */
+void
+sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
+                       struct sctp_nets *src_net, struct mbuf *init_pkt,
+                       int iphlen, int offset,
+                       struct sockaddr *src, struct sockaddr *dst,
+                       struct sctphdr *sh, struct sctp_init_chunk *init_chk,
+#if defined(__FreeBSD__)
+		       uint8_t mflowtype, uint32_t mflowid,
+#endif
+                       uint32_t vrf_id, uint16_t port, int hold_inp_lock)
+{
+	struct sctp_association *asoc;
+	struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
+	struct sctp_init_ack_chunk *initack;
+	struct sctp_adaptation_layer_indication *ali;
+	struct sctp_supported_chunk_types_param *pr_supported;
+	struct sctp_paramhdr *ph;
+	union sctp_sockstore *over_addr;
+	struct sctp_scoping scp;
+#ifdef INET
+	struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
+	struct sockaddr_in *src4 = (struct sockaddr_in *)src;
+	struct sockaddr_in *sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
+	struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
+	struct sockaddr_in6 *sin6;
+#endif
+#if defined(__Userspace__)
+	struct sockaddr_conn *dstconn = (struct sockaddr_conn *)dst;
+	struct sockaddr_conn *srcconn = (struct sockaddr_conn *)src;
+	struct sockaddr_conn *sconn;
+#endif
+	struct sockaddr *to;
+	struct sctp_state_cookie stc;
+	struct sctp_nets *net = NULL;
+	uint8_t *signature = NULL;
+	int cnt_inits_to = 0;
+	uint16_t his_limit, i_want;
+	int abort_flag;
+	int nat_friendly = 0;
+	int error;
+	struct socket *so;
+	uint16_t num_ext, chunk_len, padding_len, parameter_len;
+
+	if (stcb) {
+		asoc = &stcb->asoc;
+	} else {
+		asoc = NULL;
+	}
+	if ((asoc != NULL) &&
+	    (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
+		if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
+			/*
+			 * new addresses, out of here in non-cookie-wait states
+			 *
+			 * Send an ABORT, without the new address error cause.
+			 * This looks no different than if no listener
+			 * was present.
+			 */
+			op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+			                             "Address added");
+			sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
+#if defined(__FreeBSD__)
+			                mflowtype, mflowid, inp->fibnum,
+#endif
+			                vrf_id, port);
+			return;
+		}
+		if (src_net != NULL && (src_net->port != port)) {
+			/*
+			 * change of remote encapsulation port, out of here in
+			 * non-cookie-wait states
+			 *
+			 * Send an ABORT, without an specific error cause.
+			 * This looks no different than if no listener
+			 * was present.
+			 */
+			op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+			                             "Remote encapsulation port changed");
+			sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
+#if defined(__FreeBSD__)
+			                mflowtype, mflowid, inp->fibnum,
+#endif
+			                vrf_id, port);
+			return;
+		}
+	}
+	abort_flag = 0;
+	op_err = sctp_arethere_unrecognized_parameters(init_pkt,
+						       (offset + sizeof(struct sctp_init_chunk)),
+						       &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
+	if (abort_flag) {
+	do_a_abort:
+		if (op_err == NULL) {
+			char msg[SCTP_DIAG_INFO_LEN];
+
+			snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
+			op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+			                             msg);
+		}
+		sctp_send_abort(init_pkt, iphlen, src, dst, sh,
+				init_chk->init.initiate_tag, op_err,
+#if defined(__FreeBSD__)
+		                mflowtype, mflowid, inp->fibnum,
+#endif
+		                vrf_id, port);
+		return;
+	}
+	m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (m == NULL) {
+		/* No memory, INIT timer will re-attempt. */
+		if (op_err)
+			sctp_m_freem(op_err);
+		return;
+	}
+	chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
+	padding_len = 0;
+
+	/*
+	 * We might not overwrite the identification[] completely and on
+	 * some platforms time_entered will contain some padding.
+	 * Therefore zero out the cookie to avoid putting
+	 * uninitialized memory on the wire.
+	 */
+	memset(&stc, 0, sizeof(struct sctp_state_cookie));
+
+	/* the time I built cookie */
+	(void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
+
+	/* populate any tie tags */
+	if (asoc != NULL) {
+		/* unlock before tag selections */
+		stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
+		stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
+		stc.cookie_life = asoc->cookie_life;
+		net = asoc->primary_destination;
+	} else {
+		stc.tie_tag_my_vtag = 0;
+		stc.tie_tag_peer_vtag = 0;
+		/* life I will award this cookie */
+		stc.cookie_life = inp->sctp_ep.def_cookie_life;
+	}
+
+	/* copy in the ports for later check */
+	stc.myport = sh->dest_port;
+	stc.peerport = sh->src_port;
+
+	/*
+	 * If we wanted to honor cookie life extensions, we would add to
+	 * stc.cookie_life. For now we should NOT honor any extension
+	 */
+	stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+		stc.ipv6_addr_legal = 1;
+		if (SCTP_IPV6_V6ONLY(inp)) {
+			stc.ipv4_addr_legal = 0;
+		} else {
+			stc.ipv4_addr_legal = 1;
+		}
+#if defined(__Userspace__)
+		stc.conn_addr_legal = 0;
+#endif
+	} else {
+		stc.ipv6_addr_legal = 0;
+#if defined(__Userspace__)
+		if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) {
+			stc.conn_addr_legal = 1;
+			stc.ipv4_addr_legal = 0;
+		} else {
+			stc.conn_addr_legal = 0;
+			stc.ipv4_addr_legal = 1;
+		}
+#else
+		stc.ipv4_addr_legal = 1;
+#endif
+	}
+	stc.ipv4_scope = 0;
+	if (net == NULL) {
+		to = src;
+		switch (dst->sa_family) {
+#ifdef INET
+		case AF_INET:
+		{
+			/* lookup address */
+			stc.address[0] = src4->sin_addr.s_addr;
+			stc.address[1] = 0;
+			stc.address[2] = 0;
+			stc.address[3] = 0;
+			stc.addr_type = SCTP_IPV4_ADDRESS;
+			/* local from address */
+			stc.laddress[0] = dst4->sin_addr.s_addr;
+			stc.laddress[1] = 0;
+			stc.laddress[2] = 0;
+			stc.laddress[3] = 0;
+			stc.laddr_type = SCTP_IPV4_ADDRESS;
+			/* scope_id is only for v6 */
+			stc.scope_id = 0;
+			if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
+			    (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))){
+				stc.ipv4_scope = 1;
+			}
+			/* Must use the address in this case */
+			if (sctp_is_address_on_local_host(src, vrf_id)) {
+				stc.loopback_scope = 1;
+				stc.ipv4_scope = 1;
+				stc.site_scope = 1;
+				stc.local_scope = 0;
+			}
+			break;
+		}
+#endif
+#ifdef INET6
+		case AF_INET6:
+		{
+			stc.addr_type = SCTP_IPV6_ADDRESS;
+			memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
+#if defined(__FreeBSD__) && (((__FreeBSD_version < 900000) && (__FreeBSD_version >= 804000)) || (__FreeBSD_version > 900000))
+			stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
+#else
+			stc.scope_id = 0;
+#endif
+			if (sctp_is_address_on_local_host(src, vrf_id)) {
+				stc.loopback_scope = 1;
+				stc.local_scope = 0;
+				stc.site_scope = 1;
+				stc.ipv4_scope = 1;
+			} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
+			           IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
+				/*
+				 * If the new destination or source is a
+				 * LINK_LOCAL we must have common both site and
+				 * local scope. Don't set local scope though
+				 * since we must depend on the source to be
+				 * added implicitly. We cannot assure just
+				 * because we share one link that all links are
+				 * common.
+				 */
+#if defined(__APPLE__)
+				/* Mac OS X currently doesn't have in6_getscope() */
+				stc.scope_id = src6->sin6_addr.s6_addr16[1];
+#endif
+				stc.local_scope = 0;
+				stc.site_scope = 1;
+				stc.ipv4_scope = 1;
+				/*
+				 * we start counting for the private address
+				 * stuff at 1. since the link local we
+				 * source from won't show up in our scoped
+				 * count.
+				 */
+				cnt_inits_to = 1;
+				/* pull out the scope_id from incoming pkt */
+			} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
+			           IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
+				/*
+				 * If the new destination or source is
+				 * SITE_LOCAL then we must have site scope in
+				 * common.
+				 */
+				stc.site_scope = 1;
+			}
+			memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
+			stc.laddr_type = SCTP_IPV6_ADDRESS;
+			break;
+		}
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+		{
+			/* lookup address */
+			stc.address[0] = 0;
+			stc.address[1] = 0;
+			stc.address[2] = 0;
+			stc.address[3] = 0;
+			memcpy(&stc.address, &srcconn->sconn_addr, sizeof(void *));
+			stc.addr_type = SCTP_CONN_ADDRESS;
+			/* local from address */
+			stc.laddress[0] = 0;
+			stc.laddress[1] = 0;
+			stc.laddress[2] = 0;
+			stc.laddress[3] = 0;
+			memcpy(&stc.laddress, &dstconn->sconn_addr, sizeof(void *));
+			stc.laddr_type = SCTP_CONN_ADDRESS;
+			/* scope_id is only for v6 */
+			stc.scope_id = 0;
+			break;
+		}
+#endif
+		default:
+			/* TSNH */
+			goto do_a_abort;
+			break;
+		}
+	} else {
+		/* set the scope per the existing tcb */
+
+#ifdef INET6
+		struct sctp_nets *lnet;
+#endif
+
+		stc.loopback_scope = asoc->scope.loopback_scope;
+		stc.ipv4_scope = asoc->scope.ipv4_local_scope;
+		stc.site_scope = asoc->scope.site_scope;
+		stc.local_scope = asoc->scope.local_scope;
+#ifdef INET6
+		/* Why do we not consider IPv4 LL addresses? */
+		TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
+			if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
+				if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
+					/*
+					 * if we have a LL address, start
+					 * counting at 1.
+					 */
+					cnt_inits_to = 1;
+				}
+			}
+		}
+#endif
+		/* use the net pointer */
+		to = (struct sockaddr *)&net->ro._l_addr;
+		switch (to->sa_family) {
+#ifdef INET
+		case AF_INET:
+			sin = (struct sockaddr_in *)to;
+			stc.address[0] = sin->sin_addr.s_addr;
+			stc.address[1] = 0;
+			stc.address[2] = 0;
+			stc.address[3] = 0;
+			stc.addr_type = SCTP_IPV4_ADDRESS;
+			if (net->src_addr_selected == 0) {
+				/*
+				 * strange case here, the INIT should have
+				 * did the selection.
+				 */
+				net->ro._s_addr = sctp_source_address_selection(inp,
+										stcb, (sctp_route_t *)&net->ro,
+										net, 0, vrf_id);
+				if (net->ro._s_addr == NULL)
+					return;
+
+				net->src_addr_selected = 1;
+
+			}
+			stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
+			stc.laddress[1] = 0;
+			stc.laddress[2] = 0;
+			stc.laddress[3] = 0;
+			stc.laddr_type = SCTP_IPV4_ADDRESS;
+			/* scope_id is only for v6 */
+			stc.scope_id = 0;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			sin6 = (struct sockaddr_in6 *)to;
+			memcpy(&stc.address, &sin6->sin6_addr,
+			       sizeof(struct in6_addr));
+			stc.addr_type = SCTP_IPV6_ADDRESS;
+			stc.scope_id = sin6->sin6_scope_id;
+			if (net->src_addr_selected == 0) {
+				/*
+				 * strange case here, the INIT should have
+				 * done the selection.
+				 */
+				net->ro._s_addr = sctp_source_address_selection(inp,
+										stcb, (sctp_route_t *)&net->ro,
+										net, 0, vrf_id);
+				if (net->ro._s_addr == NULL)
+					return;
+
+				net->src_addr_selected = 1;
+			}
+			memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
+			       sizeof(struct in6_addr));
+			stc.laddr_type = SCTP_IPV6_ADDRESS;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+			sconn = (struct sockaddr_conn *)to;
+			stc.address[0] = 0;
+			stc.address[1] = 0;
+			stc.address[2] = 0;
+			stc.address[3] = 0;
+			memcpy(&stc.address, &sconn->sconn_addr, sizeof(void *));
+			stc.addr_type = SCTP_CONN_ADDRESS;
+			stc.laddress[0] = 0;
+			stc.laddress[1] = 0;
+			stc.laddress[2] = 0;
+			stc.laddress[3] = 0;
+			memcpy(&stc.laddress, &sconn->sconn_addr, sizeof(void *));
+			stc.laddr_type = SCTP_CONN_ADDRESS;
+			stc.scope_id = 0;
+			break;
+#endif
+		}
+	}
+	/* Now lets put the SCTP header in place */
+	initack = mtod(m, struct sctp_init_ack_chunk *);
+	/* Save it off for quick ref */
+	stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
+	/* who are we */
+	memcpy(stc.identification, SCTP_VERSION_STRING,
+	       min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
+	memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
+	/* now the chunk header */
+	initack->ch.chunk_type = SCTP_INITIATION_ACK;
+	initack->ch.chunk_flags = 0;
+	/* fill in later from mbuf we build */
+	initack->ch.chunk_length = 0;
+	/* place in my tag */
+	if ((asoc != NULL) &&
+	    ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+	     (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
+	     (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
+		/* re-use the v-tags and init-seq here */
+		initack->init.initiate_tag = htonl(asoc->my_vtag);
+		initack->init.initial_tsn = htonl(asoc->init_seq_number);
+	} else {
+		uint32_t vtag, itsn;
+		if (hold_inp_lock) {
+			SCTP_INP_INCR_REF(inp);
+			SCTP_INP_RUNLOCK(inp);
+		}
+		if (asoc) {
+			atomic_add_int(&asoc->refcnt, 1);
+			SCTP_TCB_UNLOCK(stcb);
+		new_tag:
+			vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
+			if ((asoc->peer_supports_nat)  && (vtag == asoc->my_vtag)) {
+				/* Got a duplicate vtag on some guy behind a nat
+				 * make sure we don't use it.
+				 */
+				goto new_tag;
+			}
+			initack->init.initiate_tag = htonl(vtag);
+			/* get a TSN to use too */
+			itsn = sctp_select_initial_TSN(&inp->sctp_ep);
+			initack->init.initial_tsn = htonl(itsn);
+			SCTP_TCB_LOCK(stcb);
+			atomic_add_int(&asoc->refcnt, -1);
+		} else {
+			vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
+			initack->init.initiate_tag = htonl(vtag);
+			/* get a TSN to use too */
+			initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
+		}
+		if (hold_inp_lock) {
+			SCTP_INP_RLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+		}
+	}
+	/* save away my tag to */
+	stc.my_vtag = initack->init.initiate_tag;
+
+	/* set up some of the credits. */
+	so = inp->sctp_socket;
+	if (so == NULL) {
+		/* memory problem */
+		sctp_m_freem(m);
+		return;
+	} else {
+		initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
+	}
+	/* set what I want */
+	his_limit = ntohs(init_chk->init.num_inbound_streams);
+	/* choose what I want */
+	if (asoc != NULL) {
+		if (asoc->streamoutcnt > asoc->pre_open_streams) {
+			i_want = asoc->streamoutcnt;
+		} else {
+			i_want = asoc->pre_open_streams;
+		}
+	} else {
+		i_want = inp->sctp_ep.pre_open_stream_count;
+	}
+	if (his_limit < i_want) {
+		/* I Want more :< */
+		initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
+	} else {
+		/* I can have what I want :> */
+		initack->init.num_outbound_streams = htons(i_want);
+	}
+	/* tell him his limit. */
+	initack->init.num_inbound_streams =
+		htons(inp->sctp_ep.max_open_streams_intome);
+
+	/* adaptation layer indication parameter */
+	if (inp->sctp_ep.adaptation_layer_indicator_provided) {
+		parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
+		ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t) + chunk_len);
+		ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
+		ali->ph.param_length = htons(parameter_len);
+		ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
+		chunk_len += parameter_len;
+	}
+
+	/* ECN parameter */
+	if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
+	    ((asoc == NULL) && (inp->ecn_supported == 1))) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_ECN_CAPABLE);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* PR-SCTP supported parameter */
+	if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
+	    ((asoc == NULL) && (inp->prsctp_supported == 1))) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* Add NAT friendly parameter */
+	if (nat_friendly) {
+		parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
+		ph = (struct sctp_paramhdr *)(mtod(m, caddr_t) + chunk_len);
+		ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
+		ph->param_length = htons(parameter_len);
+		chunk_len += parameter_len;
+	}
+
+	/* And now tell the peer which extensions we support */
+	num_ext = 0;
+	pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t) + chunk_len);
+	if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
+	    ((asoc == NULL) && (inp->prsctp_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
+		if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
+		    ((asoc == NULL) && (inp->idata_supported == 1))) {
+			pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
+		}
+	}
+	if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
+	    ((asoc == NULL) && (inp->auth_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
+	}
+	if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
+	    ((asoc == NULL) && (inp->asconf_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
+		pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
+	}
+	if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
+	    ((asoc == NULL) && (inp->reconfig_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
+	}
+	if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
+	    ((asoc == NULL) && (inp->idata_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
+	}
+	if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
+	    ((asoc == NULL) && (inp->nrsack_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
+	}
+	if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
+	    ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
+		pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
+	}
+	if (num_ext > 0) {
+		parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
+		pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
+		pr_supported->ph.param_length = htons(parameter_len);
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		chunk_len += parameter_len;
+	}
+
+	/* add authentication parameters */
+	if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
+	    ((asoc == NULL) && (inp->auth_supported == 1))) {
+		struct sctp_auth_random *randp;
+		struct sctp_auth_hmac_algo *hmacs;
+		struct sctp_auth_chunk_list *chunks;
+
+		if (padding_len > 0) {
+			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+			chunk_len += padding_len;
+			padding_len = 0;
+		}
+		/* generate and add RANDOM parameter */
+		randp = (struct sctp_auth_random *)(mtod(m, caddr_t) + chunk_len);
+		parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
+		                SCTP_AUTH_RANDOM_SIZE_DEFAULT;
+		randp->ph.param_type = htons(SCTP_RANDOM);
+		randp->ph.param_length = htons(parameter_len);
+		SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		chunk_len += parameter_len;
+
+		if (padding_len > 0) {
+			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+			chunk_len += padding_len;
+			padding_len = 0;
+		}
+		/* add HMAC_ALGO parameter */
+		hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t) + chunk_len);
+		parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
+		                sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
+		                                        (uint8_t *)hmacs->hmac_ids);
+		hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
+		hmacs->ph.param_length = htons(parameter_len);
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		chunk_len += parameter_len;
+
+		if (padding_len > 0) {
+			memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+			chunk_len += padding_len;
+			padding_len = 0;
+		}
+		/* add CHUNKS parameter */
+		chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t) + chunk_len);
+		parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
+		                sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
+		                                           chunks->chunk_types);
+		chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
+		chunks->ph.param_length = htons(parameter_len);
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		chunk_len += parameter_len;
+	}
+	SCTP_BUF_LEN(m) = chunk_len;
+	m_last = m;
+	/* now the addresses */
+	/* To optimize this we could put the scoping stuff
+	 * into a structure and remove the individual uint8's from
+	 * the stc structure. Then we could just sifa in the
+	 * address within the stc.. but for now this is a quick
+	 * hack to get the address stuff teased apart.
+	 */
+	scp.ipv4_addr_legal = stc.ipv4_addr_legal;
+	scp.ipv6_addr_legal = stc.ipv6_addr_legal;
+#if defined(__Userspace__)
+	scp.conn_addr_legal = stc.conn_addr_legal;
+#endif
+	scp.loopback_scope = stc.loopback_scope;
+	scp.ipv4_local_scope = stc.ipv4_scope;
+	scp.local_scope = stc.local_scope;
+	scp.site_scope = stc.site_scope;
+	m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
+	                                    cnt_inits_to,
+	                                    &padding_len, &chunk_len);
+	/* padding_len can only be positive, if no addresses have been added */
+	if (padding_len > 0) {
+		memset(mtod(m, caddr_t) + chunk_len, 0, padding_len);
+		chunk_len += padding_len;
+		SCTP_BUF_LEN(m) += padding_len;
+		padding_len = 0;
+	}
+
+	/* tack on the operational error if present */
+	if (op_err) {
+		parameter_len = 0;
+		for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
+			parameter_len += SCTP_BUF_LEN(m_tmp);
+		}
+		padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+		SCTP_BUF_NEXT(m_last) = op_err;
+		while (SCTP_BUF_NEXT(m_last) != NULL) {
+			m_last = SCTP_BUF_NEXT(m_last);
+		}
+		chunk_len += parameter_len;
+	}
+	if (padding_len > 0) {
+		m_last = sctp_add_pad_tombuf(m_last, padding_len);
+		if (m_last == NULL) {
+			/* Houston we have a problem, no space */
+			sctp_m_freem(m);
+			return;
+		}
+		chunk_len += padding_len;
+		padding_len = 0;
+	}
+	/* Now we must build a cookie */
+	m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
+	if (m_cookie == NULL) {
+		/* memory problem */
+		sctp_m_freem(m);
+		return;
+	}
+	/* Now append the cookie to the end and update the space/size */
+	SCTP_BUF_NEXT(m_last) = m_cookie;
+	parameter_len = 0;
+	for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
+		parameter_len += SCTP_BUF_LEN(m_tmp);
+		if (SCTP_BUF_NEXT(m_tmp) == NULL) {
+			m_last = m_tmp;
+		}
+	}
+	padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
+	chunk_len += parameter_len;
+
+	/* Place in the size, but we don't include
+	 * the last pad (if any) in the INIT-ACK.
+	 */
+	initack->ch.chunk_length = htons(chunk_len);
+
+	/* Time to sign the cookie, we don't sign over the cookie
+	 * signature though thus we set trailer.
+	 */
+	(void)sctp_hmac_m(SCTP_HMAC,
+			  (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
+			  SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
+			  (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
+	/*
+	 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
+	 * here since the timer will drive a retranmission.
+	 */
+	if (padding_len > 0) {
+		if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
+			sctp_m_freem(m);
+			return;
+		}
+	}
+	if (stc.loopback_scope) {
+		over_addr = (union sctp_sockstore *)dst;
+	} else {
+		over_addr = NULL;
+	}
+
+	if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
+	                                        0, 0,
+	                                        inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
+	                                        port, over_addr,
+#if defined(__FreeBSD__)
+	                                        mflowtype, mflowid,
+#endif
+	                                        SCTP_SO_NOT_LOCKED))) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
+		if (error == ENOBUFS) {
+			if (asoc != NULL) {
+				asoc->ifp_had_enobuf = 1;
+			}
+			SCTP_STAT_INCR(sctps_lowlevelerr);
+		}
+	} else {
+		if (asoc != NULL) {
+			asoc->ifp_had_enobuf = 0;
+		}
+	}
+	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+
+static void
+sctp_prune_prsctp(struct sctp_tcb *stcb,
+    struct sctp_association *asoc,
+    struct sctp_sndrcvinfo *srcv,
+    int dataout)
+{
+	int freed_spc = 0;
+	struct sctp_tmit_chunk *chk, *nchk;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if ((asoc->prsctp_supported) &&
+	    (asoc->sent_queue_cnt_removeable > 0)) {
+		TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
+			/*
+			 * Look for chunks marked with the PR_SCTP flag AND
+			 * the buffer space flag. If the one being sent is
+			 * equal or greater priority then purge the old one
+			 * and free some space.
+			 */
+			if (PR_SCTP_BUF_ENABLED(chk->flags)) {
+				/*
+				 * This one is PR-SCTP AND buffer space
+				 * limited type
+				 */
+				if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
+					/*
+					 * Lower numbers equates to higher
+					 * priority so if the one we are
+					 * looking at has a larger or equal
+					 * priority we want to drop the data
+					 * and NOT retransmit it.
+					 */
+					if (chk->data) {
+						/*
+						 * We release the book_size
+						 * if the mbuf is here
+						 */
+						int ret_spc;
+						uint8_t sent;
+
+						if (chk->sent > SCTP_DATAGRAM_UNSENT)
+							sent = 1;
+						else
+							sent = 0;
+						ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
+						    sent,
+						    SCTP_SO_LOCKED);
+						freed_spc += ret_spc;
+						if (freed_spc >= dataout) {
+							return;
+						}
+					}	/* if chunk was present */
+				}	/* if of sufficient priority */
+			}	/* if chunk has enabled */
+		}		/* tailqforeach */
+
+		TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
+			/* Here we must move to the sent queue and mark */
+			if (PR_SCTP_BUF_ENABLED(chk->flags)) {
+				if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
+					if (chk->data) {
+						/*
+						 * We release the book_size
+						 * if the mbuf is here
+						 */
+						int ret_spc;
+
+						ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
+						    0, SCTP_SO_LOCKED);
+
+						freed_spc += ret_spc;
+						if (freed_spc >= dataout) {
+							return;
+						}
+					}	/* end if chk->data */
+				}	/* end if right class */
+			}	/* end if chk pr-sctp */
+		}		/* tailqforeachsafe (chk) */
+	}			/* if enabled in asoc */
+}
+
+int
+sctp_get_frag_point(struct sctp_tcb *stcb,
+    struct sctp_association *asoc)
+{
+	int siz, ovh;
+
+	/*
+	 * For endpoints that have both v6 and v4 addresses we must reserve
+	 * room for the ipv6 header, for those that are only dealing with V4
+	 * we use a larger frag point.
+	 */
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+		ovh = SCTP_MIN_OVERHEAD;
+	} else {
+		ovh = SCTP_MIN_V4_OVERHEAD;
+	}
+	if (stcb->asoc.idata_supported) {
+		ovh += sizeof(struct sctp_idata_chunk);
+	} else {
+		ovh += sizeof(struct sctp_data_chunk);
+	}
+	if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
+		siz = asoc->smallest_mtu - ovh;
+	else
+		siz = (stcb->asoc.sctp_frag_point - ovh);
+	/*
+	 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
+	 */
+	/* A data chunk MUST fit in a cluster */
+	/* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
+	/* } */
+
+	/* adjust for an AUTH chunk if DATA requires auth */
+	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
+		siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+
+	if (siz % 4) {
+		/* make it an even word boundary please */
+		siz -= (siz % 4);
+	}
+	return (siz);
+}
+
+static void
+sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
+{
+	/*
+	 * We assume that the user wants PR_SCTP_TTL if the user
+	 * provides a positive lifetime but does not specify any
+	 * PR_SCTP policy.
+	 */
+	if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
+		sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
+	} else if (sp->timetolive > 0) {
+		sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
+		sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
+	} else {
+		return;
+	}
+	switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
+	case CHUNK_FLAGS_PR_SCTP_BUF:
+		/*
+		 * Time to live is a priority stored in tv_sec when
+		 * doing the buffer drop thing.
+		 */
+		sp->ts.tv_sec = sp->timetolive;
+		sp->ts.tv_usec = 0;
+		break;
+	case CHUNK_FLAGS_PR_SCTP_TTL:
+	{
+		struct timeval tv;
+		(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+		tv.tv_sec = sp->timetolive / 1000;
+		tv.tv_usec = (sp->timetolive * 1000) % 1000000;
+		/* TODO sctp_constants.h needs alternative time macros when
+		 *  _KERNEL is undefined.
+		 */
+#ifndef __FreeBSD__
+		timeradd(&sp->ts, &tv, &sp->ts);
+#else
+		timevaladd(&sp->ts, &tv);
+#endif
+	}
+		break;
+	case CHUNK_FLAGS_PR_SCTP_RTX:
+		/*
+		 * Time to live is a the number or retransmissions
+		 * stored in tv_sec.
+		 */
+		sp->ts.tv_sec = sp->timetolive;
+		sp->ts.tv_usec = 0;
+		break;
+	default:
+		SCTPDBG(SCTP_DEBUG_USRREQ1,
+			"Unknown PR_SCTP policy %u.\n",
+			PR_SCTP_POLICY(sp->sinfo_flags));
+		break;
+	}
+}
+
+static int
+sctp_msg_append(struct sctp_tcb *stcb,
+		struct sctp_nets *net,
+		struct mbuf *m,
+		struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
+{
+	int error = 0;
+	struct mbuf *at;
+	struct sctp_stream_queue_pending *sp = NULL;
+	struct sctp_stream_out *strm;
+
+	/* Given an mbuf chain, put it
+	 * into the association send queue and
+	 * place it on the wheel
+	 */
+	if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
+		/* Invalid stream number */
+		SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_now;
+	}
+	if ((stcb->asoc.stream_locked) &&
+	    (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
+		SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_now;
+	}
+	strm = &stcb->asoc.strmout[srcv->sinfo_stream];
+	/* Now can we send this? */
+	if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+	    (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+	    (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+	    (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
+		/* got data while shutting down */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+		error = ECONNRESET;
+		goto out_now;
+	}
+	sctp_alloc_a_strmoq(stcb, sp);
+	if (sp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		error = ENOMEM;
+		goto out_now;
+	}
+	sp->sinfo_flags = srcv->sinfo_flags;
+	sp->timetolive = srcv->sinfo_timetolive;
+	sp->ppid = srcv->sinfo_ppid;
+	sp->context = srcv->sinfo_context;
+	sp->fsn = 0;
+	if (sp->sinfo_flags & SCTP_ADDR_OVER) {
+		sp->net = net;
+		atomic_add_int(&sp->net->ref_count, 1);
+	} else {
+		sp->net = NULL;
+	}
+	(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+	sp->sid = srcv->sinfo_stream;
+	sp->msg_is_complete = 1;
+	sp->sender_all_done = 1;
+	sp->some_taken = 0;
+	sp->data = m;
+	sp->tail_mbuf = NULL;
+	sctp_set_prsctp_policy(sp);
+	/* We could in theory (for sendall) sifa the length
+	 * in, but we would still have to hunt through the
+	 * chain since we need to setup the tail_mbuf
+	 */
+	sp->length = 0;
+	for (at = m; at; at = SCTP_BUF_NEXT(at)) {
+		if (SCTP_BUF_NEXT(at) == NULL)
+			sp->tail_mbuf = at;
+		sp->length += SCTP_BUF_LEN(at);
+	}
+	if (srcv->sinfo_keynumber_valid) {
+		sp->auth_keyid = srcv->sinfo_keynumber;
+	} else {
+		sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
+	}
+	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
+		sctp_auth_key_acquire(stcb, sp->auth_keyid);
+		sp->holds_key_ref = 1;
+	}
+	if (hold_stcb_lock == 0) {
+		SCTP_TCB_SEND_LOCK(stcb);
+	}
+	sctp_snd_sb_alloc(stcb, sp->length);
+	atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
+	TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
+	stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
+	m = NULL;
+	if (hold_stcb_lock == 0) {
+		SCTP_TCB_SEND_UNLOCK(stcb);
+	}
+out_now:
+	if (m) {
+		sctp_m_freem(m);
+	}
+	return (error);
+}
+
+
+static struct mbuf *
+sctp_copy_mbufchain(struct mbuf *clonechain,
+		    struct mbuf *outchain,
+		    struct mbuf **endofchain,
+		    int can_take_mbuf,
+		    int sizeofcpy,
+		    uint8_t copy_by_ref)
+{
+	struct mbuf *m;
+	struct mbuf *appendchain;
+	caddr_t cp;
+	int len;
+
+	if (endofchain == NULL) {
+		/* error */
+	error_out:
+		if (outchain)
+			sctp_m_freem(outchain);
+		return (NULL);
+	}
+	if (can_take_mbuf) {
+		appendchain = clonechain;
+	} else {
+		if (!copy_by_ref &&
+#if defined(__Panda__)
+		    0
+#else
+		    (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
+#endif
+		    ) {
+			/* Its not in a cluster */
+			if (*endofchain == NULL) {
+				/* lets get a mbuf cluster */
+				if (outchain == NULL) {
+					/* This is the general case */
+				new_mbuf:
+					outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
+					if (outchain == NULL) {
+						goto error_out;
+					}
+					SCTP_BUF_LEN(outchain) = 0;
+					*endofchain = outchain;
+					/* get the prepend space */
+					SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV+4));
+				} else {
+					/* We really should not get a NULL in endofchain */
+					/* find end */
+					m = outchain;
+					while (m) {
+						if (SCTP_BUF_NEXT(m) == NULL) {
+							*endofchain = m;
+							break;
+						}
+						m = SCTP_BUF_NEXT(m);
+					}
+					/* sanity */
+					if (*endofchain == NULL) {
+						/* huh, TSNH XXX maybe we should panic */
+						sctp_m_freem(outchain);
+						goto new_mbuf;
+					}
+				}
+				/* get the new end of length */
+				len = (int)M_TRAILINGSPACE(*endofchain);
+			} else {
+				/* how much is left at the end? */
+				len = (int)M_TRAILINGSPACE(*endofchain);
+			}
+			/* Find the end of the data, for appending */
+			cp = (mtod((*endofchain), caddr_t) + SCTP_BUF_LEN((*endofchain)));
+
+			/* Now lets copy it out */
+			if (len >= sizeofcpy) {
+				/* It all fits, copy it in */
+				m_copydata(clonechain, 0, sizeofcpy, cp);
+				SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
+			} else {
+				/* fill up the end of the chain */
+				if (len > 0) {
+					m_copydata(clonechain, 0, len, cp);
+					SCTP_BUF_LEN((*endofchain)) += len;
+					/* now we need another one */
+					sizeofcpy -= len;
+				}
+				m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
+				if (m == NULL) {
+					/* We failed */
+					goto error_out;
+				}
+				SCTP_BUF_NEXT((*endofchain)) = m;
+				*endofchain = m;
+				cp = mtod((*endofchain), caddr_t);
+				m_copydata(clonechain, len, sizeofcpy, cp);
+				SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
+			}
+			return (outchain);
+		} else {
+			/* copy the old fashion way */
+			appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
+#ifdef SCTP_MBUF_LOGGING
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+				sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
+			}
+#endif
+		}
+	}
+	if (appendchain == NULL) {
+		/* error */
+		if (outchain)
+			sctp_m_freem(outchain);
+		return (NULL);
+	}
+	if (outchain) {
+		/* tack on to the end */
+		if (*endofchain != NULL) {
+			SCTP_BUF_NEXT(((*endofchain))) = appendchain;
+		} else {
+			m = outchain;
+			while (m) {
+				if (SCTP_BUF_NEXT(m) == NULL) {
+					SCTP_BUF_NEXT(m) = appendchain;
+					break;
+				}
+				m = SCTP_BUF_NEXT(m);
+			}
+		}
+		/*
+		 * save off the end and update the end-chain
+		 * position
+		 */
+		m = appendchain;
+		while (m) {
+			if (SCTP_BUF_NEXT(m) == NULL) {
+				*endofchain = m;
+				break;
+			}
+			m = SCTP_BUF_NEXT(m);
+		}
+		return (outchain);
+	} else {
+		/* save off the end and update the end-chain position */
+		m = appendchain;
+		while (m) {
+			if (SCTP_BUF_NEXT(m) == NULL) {
+				*endofchain = m;
+				break;
+			}
+			m = SCTP_BUF_NEXT(m);
+		}
+		return (appendchain);
+	}
+}
+
+static int
+sctp_med_chunk_output(struct sctp_inpcb *inp,
+		      struct sctp_tcb *stcb,
+		      struct sctp_association *asoc,
+		      int *num_out,
+		      int *reason_code,
+		      int control_only, int from_where,
+		      struct timeval *now, int *now_filled, int frag_point, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+		      SCTP_UNUSED
+#endif
+                      );
+
+static void
+sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
+    uint32_t val SCTP_UNUSED)
+{
+	struct sctp_copy_all *ca;
+	struct mbuf *m;
+	int ret = 0;
+	int added_control = 0;
+	int un_sent, do_chunk_output = 1;
+	struct sctp_association *asoc;
+	struct sctp_nets *net;
+
+	ca = (struct sctp_copy_all *)ptr;
+	if (ca->m == NULL) {
+		return;
+	}
+	if (ca->inp != inp) {
+		/* TSNH */
+		return;
+	}
+	if (ca->sndlen > 0) {
+		m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
+		if (m == NULL) {
+			/* can't copy so we are done */
+			ca->cnt_failed++;
+			return;
+		}
+#ifdef SCTP_MBUF_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+			sctp_log_mbc(m, SCTP_MBUF_ICOPY);
+		}
+#endif
+	} else {
+		m = NULL;
+	}
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (stcb->asoc.alternate) {
+		net = stcb->asoc.alternate;
+	} else {
+		net = stcb->asoc.primary_destination;
+	}
+	if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
+		/* Abort this assoc with m as the user defined reason */
+		if (m != NULL) {
+			SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
+		} else {
+			m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
+			                          0, M_NOWAIT, 1, MT_DATA);
+			SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
+		}
+		if (m != NULL) {
+			struct sctp_paramhdr *ph;
+
+			ph = mtod(m, struct sctp_paramhdr *);
+			ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
+			ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
+		}
+		/* We add one here to keep the assoc from
+		 * dis-appearing on us.
+		 */
+		atomic_add_int(&stcb->asoc.refcnt, 1);
+		sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
+		/* sctp_abort_an_association calls sctp_free_asoc()
+		 * free association will NOT free it since we
+		 * incremented the refcnt .. we do this to prevent
+		 * it being freed and things getting tricky since
+		 * we could end up (from free_asoc) calling inpcb_free
+		 * which would get a recursive lock call to the
+		 * iterator lock.. But as a consequence of that the
+		 * stcb will return to us un-locked.. since free_asoc
+		 * returns with either no TCB or the TCB unlocked, we
+		 * must relock.. to unlock in the iterator timer :-0
+		 */
+		SCTP_TCB_LOCK(stcb);
+		atomic_add_int(&stcb->asoc.refcnt, -1);
+		goto no_chunk_output;
+	} else {
+		if (m) {
+			ret = sctp_msg_append(stcb, net, m,
+					      &ca->sndrcv, 1);
+		}
+		asoc = &stcb->asoc;
+		if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
+			/* shutdown this assoc */
+			if (TAILQ_EMPTY(&asoc->send_queue) &&
+			    TAILQ_EMPTY(&asoc->sent_queue) &&
+			    sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
+				if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, asoc)) {
+					goto abort_anyway;
+				}
+				/* there is nothing queued to send, so I'm done... */
+				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+					/* only send SHUTDOWN the first time through */
+					if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
+						SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+					}
+					SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
+					SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
+					sctp_stop_timers_for_shutdown(stcb);
+					sctp_send_shutdown(stcb, net);
+					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
+							 net);
+					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+							 asoc->primary_destination);
+					added_control = 1;
+					do_chunk_output = 0;
+				}
+			} else {
+				/*
+				 * we still got (or just got) data to send, so set
+				 * SHUTDOWN_PENDING
+				 */
+				/*
+				 * XXX sockets draft says that SCTP_EOF should be
+				 * sent with no data.  currently, we will allow user
+				 * data to be sent first and move to
+				 * SHUTDOWN-PENDING
+				 */
+				if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+				    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+					if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, asoc)) {
+						asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
+					}
+					asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
+					if (TAILQ_EMPTY(&asoc->send_queue) &&
+					    TAILQ_EMPTY(&asoc->sent_queue) &&
+					    (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
+						struct mbuf *op_err;
+						char msg[SCTP_DIAG_INFO_LEN];
+
+					abort_anyway:
+						snprintf(msg, sizeof(msg),
+						         "%s:%d at %s", __FILE__, __LINE__, __func__);
+						op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+						                             msg);
+						atomic_add_int(&stcb->asoc.refcnt, 1);
+						sctp_abort_an_association(stcb->sctp_ep, stcb,
+									  op_err, SCTP_SO_NOT_LOCKED);
+						atomic_add_int(&stcb->asoc.refcnt, -1);
+						goto no_chunk_output;
+					}
+					sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+							 asoc->primary_destination);
+				}
+			}
+
+		}
+	}
+	un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+		   (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+
+	if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+	    (stcb->asoc.total_flight > 0) &&
+	    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
+		do_chunk_output = 0;
+	}
+	if (do_chunk_output)
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
+	else if (added_control) {
+		int num_out, reason, now_filled = 0;
+		struct timeval now;
+		int frag_point;
+
+		frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+		(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
+				      &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
+	}
+ no_chunk_output:
+	if (ret) {
+		ca->cnt_failed++;
+	} else {
+		ca->cnt_sent++;
+	}
+}
+
+static void
+sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
+{
+	struct sctp_copy_all *ca;
+
+	ca = (struct sctp_copy_all *)ptr;
+	/*
+	 * Do a notify here? Kacheong suggests that the notify be done at
+	 * the send time.. so you would push up a notification if any send
+	 * failed. Don't know if this is feasible since the only failures we
+	 * have is "memory" related and if you cannot get an mbuf to send
+	 * the data you surely can't get an mbuf to send up to notify the
+	 * user you can't send the data :->
+	 */
+
+	/* now free everything */
+	sctp_m_freem(ca->m);
+	SCTP_FREE(ca, SCTP_M_COPYAL);
+}
+
+static struct mbuf *
+sctp_copy_out_all(struct uio *uio, int len)
+{
+	struct mbuf *ret, *at;
+	int left, willcpy, cancpy, error;
+
+	ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
+	if (ret == NULL) {
+		/* TSNH */
+		return (NULL);
+	}
+	left = len;
+	SCTP_BUF_LEN(ret) = 0;
+	/* save space for the data chunk header */
+	cancpy = (int)M_TRAILINGSPACE(ret);
+	willcpy = min(cancpy, left);
+	at = ret;
+	while (left > 0) {
+		/* Align data to the end */
+		error = uiomove(mtod(at, caddr_t), willcpy, uio);
+		if (error) {
+	err_out_now:
+			sctp_m_freem(at);
+			return (NULL);
+		}
+		SCTP_BUF_LEN(at) = willcpy;
+		SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
+		left -= willcpy;
+		if (left > 0) {
+			SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
+			if (SCTP_BUF_NEXT(at) == NULL) {
+				goto err_out_now;
+			}
+			at = SCTP_BUF_NEXT(at);
+			SCTP_BUF_LEN(at) = 0;
+			cancpy = (int)M_TRAILINGSPACE(at);
+			willcpy = min(cancpy, left);
+		}
+	}
+	return (ret);
+}
+
+static int
+sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
+    struct sctp_sndrcvinfo *srcv)
+{
+	int ret;
+	struct sctp_copy_all *ca;
+
+	SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
+		    SCTP_M_COPYAL);
+	if (ca == NULL) {
+		sctp_m_freem(m);
+		SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	memset(ca, 0, sizeof(struct sctp_copy_all));
+
+	ca->inp = inp;
+	if (srcv) {
+		memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
+	}
+	/*
+	 * take off the sendall flag, it would be bad if we failed to do
+	 * this :-0
+	 */
+	ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
+	/* get length and mbuf chain */
+	if (uio) {
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+		ca->sndlen = uio->uio_resid;
+#else
+		ca->sndlen = uio_resid(uio);
+#endif
+#else
+		ca->sndlen = (int)uio->uio_resid;
+#endif
+#if defined(__APPLE__)
+		SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 0);
+#endif
+		ca->m = sctp_copy_out_all(uio, ca->sndlen);
+#if defined(__APPLE__)
+		SCTP_SOCKET_LOCK(SCTP_INP_SO(inp), 0);
+#endif
+		if (ca->m == NULL) {
+			SCTP_FREE(ca, SCTP_M_COPYAL);
+			SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			return (ENOMEM);
+		}
+	} else {
+		/* Gather the length of the send */
+		struct mbuf *mat;
+
+		ca->sndlen = 0;
+		for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
+			ca->sndlen += SCTP_BUF_LEN(mat);
+		}
+	}
+	ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
+				     SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
+				     SCTP_ASOC_ANY_STATE,
+				     (void *)ca, 0,
+				     sctp_sendall_completes, inp, 1);
+	if (ret) {
+		SCTP_PRINTF("Failed to initiate iterator for sendall\n");
+		SCTP_FREE(ca, SCTP_M_COPYAL);
+		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+		return (EFAULT);
+	}
+	return (0);
+}
+
+
+void
+sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
+{
+	struct sctp_tmit_chunk *chk, *nchk;
+
+	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
+		if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+			if (chk->data) {
+				sctp_m_freem(chk->data);
+				chk->data = NULL;
+			}
+			asoc->ctrl_queue_cnt--;
+			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		}
+	}
+}
+
+void
+sctp_toss_old_asconf(struct sctp_tcb *stcb)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk, *nchk;
+	struct sctp_asconf_chunk *acp;
+
+	asoc = &stcb->asoc;
+	TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
+		/* find SCTP_ASCONF chunk in queue */
+		if (chk->rec.chunk_id.id == SCTP_ASCONF) {
+			if (chk->data) {
+				acp = mtod(chk->data, struct sctp_asconf_chunk *);
+				if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
+					/* Not Acked yet */
+					break;
+				}
+			}
+			TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
+			if (chk->data) {
+				sctp_m_freem(chk->data);
+				chk->data = NULL;
+			}
+			asoc->ctrl_queue_cnt--;
+			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		}
+	}
+}
+
+
+static void
+sctp_clean_up_datalist(struct sctp_tcb *stcb,
+    struct sctp_association *asoc,
+    struct sctp_tmit_chunk **data_list,
+    int bundle_at,
+    struct sctp_nets *net)
+{
+	int i;
+	struct sctp_tmit_chunk *tp1;
+
+	for (i = 0; i < bundle_at; i++) {
+		/* off of the send queue */
+		TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
+		asoc->send_queue_cnt--;
+		if (i > 0) {
+			/*
+			 * Any chunk NOT 0 you zap the time chunk 0 gets
+			 * zapped or set based on if a RTO measurment is
+			 * needed.
+			 */
+			data_list[i]->do_rtt = 0;
+		}
+		/* record time */
+		data_list[i]->sent_rcv_time = net->last_sent_time;
+		data_list[i]->rec.data.cwnd_at_send = net->cwnd;
+		data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
+		if (data_list[i]->whoTo == NULL) {
+			data_list[i]->whoTo = net;
+			atomic_add_int(&net->ref_count, 1);
+		}
+		/* on to the sent queue */
+		tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
+		if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
+			struct sctp_tmit_chunk *tpp;
+
+			/* need to move back */
+		back_up_more:
+			tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
+			if (tpp == NULL) {
+				TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
+				goto all_done;
+			}
+			tp1 = tpp;
+			if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
+				goto back_up_more;
+			}
+			TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
+		} else {
+			TAILQ_INSERT_TAIL(&asoc->sent_queue,
+					  data_list[i],
+					  sctp_next);
+		}
+	all_done:
+		/* This does not lower until the cum-ack passes it */
+		asoc->sent_queue_cnt++;
+		if ((asoc->peers_rwnd <= 0) &&
+		    (asoc->total_flight == 0) &&
+		    (bundle_at == 1)) {
+			/* Mark the chunk as being a window probe */
+			SCTP_STAT_INCR(sctps_windowprobed);
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_audit_log(0xC2, 3);
+#endif
+		data_list[i]->sent = SCTP_DATAGRAM_SENT;
+		data_list[i]->snd_count = 1;
+		data_list[i]->rec.data.chunk_was_revoked = 0;
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
+			sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
+				       data_list[i]->whoTo->flight_size,
+				       data_list[i]->book_size,
+				       (uint32_t)(uintptr_t)data_list[i]->whoTo,
+				       data_list[i]->rec.data.tsn);
+		}
+		sctp_flight_size_increase(data_list[i]);
+		sctp_total_flight_increase(stcb, data_list[i]);
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
+			sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
+			      asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
+		}
+		asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
+						    (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
+		if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
+			/* SWS sender side engages */
+			asoc->peers_rwnd = 0;
+		}
+	}
+	if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
+		(*asoc->cc_functions.sctp_cwnd_update_packet_transmitted)(stcb, net);
+	}
+}
+
+static void
+sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+	SCTP_UNUSED
+#endif
+)
+{
+	struct sctp_tmit_chunk *chk, *nchk;
+
+	TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
+		if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+		    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) ||	/* EY */
+		    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
+		    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
+		    (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
+		    (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
+		    (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
+		    (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
+		    (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
+		    (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
+		    (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
+		    (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
+			/* Stray chunks must be cleaned up */
+	clean_up_anyway:
+			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+			if (chk->data) {
+				sctp_m_freem(chk->data);
+				chk->data = NULL;
+			}
+			asoc->ctrl_queue_cnt--;
+			if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
+				asoc->fwd_tsn_cnt--;
+			sctp_free_a_chunk(stcb, chk, so_locked);
+		} else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
+			/* special handling, we must look into the param */
+			if (chk != asoc->str_reset) {
+				goto clean_up_anyway;
+			}
+		}
+	}
+}
+
+
+static int
+sctp_can_we_split_this(struct sctp_tcb *stcb,
+                       uint32_t length,
+                       uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
+{
+	/* Make a decision on if I should split a
+	 * msg into multiple parts. This is only asked of
+	 * incomplete messages.
+	 */
+	if (eeor_on) {
+		/* If we are doing EEOR we need to always send
+		 * it if its the entire thing, since it might
+		 * be all the guy is putting in the hopper.
+		 */
+		if (goal_mtu >= length) {
+			/*-
+			 * If we have data outstanding,
+			 * we get another chance when the sack
+			 * arrives to transmit - wait for more data
+			 */
+			if (stcb->asoc.total_flight == 0) {
+				/* If nothing is in flight, we zero
+				 * the packet counter.
+				 */
+				return (length);
+			}
+			return (0);
+
+		} else {
+			/* You can fill the rest */
+			return (goal_mtu);
+		}
+	}
+	/*-
+	 * For those strange folk that make the send buffer
+	 * smaller than our fragmentation point, we can't
+	 * get a full msg in so we have to allow splitting.
+	 */
+	if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
+		return (length);
+	}
+
+	if ((length <= goal_mtu) ||
+	    ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
+		/* Sub-optimial residual don't split in non-eeor mode. */
+		return (0);
+	}
+	/* If we reach here length is larger
+	 * than the goal_mtu. Do we wish to split
+	 * it for the sake of packet putting together?
+	 */
+	if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
+		/* Its ok to split it */
+		return (min(goal_mtu, frag_point));
+	}
+	/* Nope, can't split */
+	return (0);
+
+}
+
+static uint32_t
+sctp_move_to_outqueue(struct sctp_tcb *stcb,
+                      struct sctp_stream_out *strq,
+                      uint32_t goal_mtu,
+                      uint32_t frag_point,
+                      int *giveup,
+                      int eeor_mode,
+                      int *bail,
+                      int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+                      SCTP_UNUSED
+#endif
+	)
+{
+	/* Move from the stream to the send_queue keeping track of the total */
+	struct sctp_association *asoc;
+	struct sctp_stream_queue_pending *sp;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_data_chunk *dchkh=NULL;
+	struct sctp_idata_chunk *ndchkh=NULL;
+	uint32_t to_move, length;
+	int leading;
+	uint8_t rcv_flags = 0;
+	uint8_t some_taken;
+	uint8_t send_lock_up = 0;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	asoc = &stcb->asoc;
+one_more_time:
+	/*sa_ignore FREED_MEMORY*/
+	sp = TAILQ_FIRST(&strq->outqueue);
+	if (sp == NULL) {
+		if (send_lock_up == 0) {
+			SCTP_TCB_SEND_LOCK(stcb);
+			send_lock_up = 1;
+		}
+		sp = TAILQ_FIRST(&strq->outqueue);
+		if (sp) {
+			goto one_more_time;
+		}
+		if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
+		    (stcb->asoc.idata_supported == 0) &&
+		    (strq->last_msg_incomplete)) {
+			SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
+			            strq->sid,
+			            strq->last_msg_incomplete);
+			strq->last_msg_incomplete = 0;
+		}
+		to_move = 0;
+		if (send_lock_up) {
+			SCTP_TCB_SEND_UNLOCK(stcb);
+			send_lock_up = 0;
+		}
+		goto out_of;
+	}
+	if ((sp->msg_is_complete) && (sp->length == 0)) {
+		if (sp->sender_all_done) {
+			/* We are doing differed cleanup. Last
+			 * time through when we took all the data
+			 * the sender_all_done was not set.
+			 */
+			if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
+				SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
+				SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
+				            sp->sender_all_done,
+				            sp->length,
+				            sp->msg_is_complete,
+				            sp->put_last_out,
+				            send_lock_up);
+			}
+			if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up  == 0)) {
+				SCTP_TCB_SEND_LOCK(stcb);
+				send_lock_up = 1;
+			}
+			atomic_subtract_int(&asoc->stream_queue_cnt, 1);
+			TAILQ_REMOVE(&strq->outqueue, sp, next);
+			stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
+			if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
+			    (strq->chunks_on_queues == 0) &&
+			    TAILQ_EMPTY(&strq->outqueue)) {
+				stcb->asoc.trigger_reset = 1;
+			}
+			if (sp->net) {
+				sctp_free_remote_addr(sp->net);
+				sp->net = NULL;
+			}
+			if (sp->data) {
+				sctp_m_freem(sp->data);
+				sp->data = NULL;
+			}
+			sctp_free_a_strmoq(stcb, sp, so_locked);
+			/* we can't be locked to it */
+			if (send_lock_up) {
+				SCTP_TCB_SEND_UNLOCK(stcb);
+				send_lock_up = 0;
+			}
+			/* back to get the next msg */
+			goto one_more_time;
+		} else {
+			/* sender just finished this but
+			 * still holds a reference
+			 */
+			*giveup = 1;
+			to_move = 0;
+			goto out_of;
+		}
+	} else {
+		/* is there some to get */
+		if (sp->length == 0) {
+			/* no */
+			*giveup = 1;
+			to_move = 0;
+			goto out_of;
+		} else if (sp->discard_rest) {
+			if (send_lock_up == 0) {
+				SCTP_TCB_SEND_LOCK(stcb);
+				send_lock_up = 1;
+			}
+			/* Whack down the size */
+			atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
+			if ((stcb->sctp_socket != NULL) &&
+			    ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+			     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
+				atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
+			}
+			if (sp->data) {
+				sctp_m_freem(sp->data);
+				sp->data = NULL;
+				sp->tail_mbuf = NULL;
+			}
+			sp->length = 0;
+			sp->some_taken = 1;
+			*giveup = 1;
+			to_move = 0;
+			goto out_of;
+		}
+	}
+	some_taken = sp->some_taken;
+re_look:
+	length = sp->length;
+	if (sp->msg_is_complete) {
+		/* The message is complete */
+		to_move = min(length, frag_point);
+		if (to_move == length) {
+			/* All of it fits in the MTU */
+			if (sp->some_taken) {
+				rcv_flags |= SCTP_DATA_LAST_FRAG;
+			} else {
+				rcv_flags |= SCTP_DATA_NOT_FRAG;
+			}
+			sp->put_last_out = 1;
+			if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
+				rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+			}
+		} else {
+			/* Not all of it fits, we fragment */
+			if (sp->some_taken == 0) {
+				rcv_flags |= SCTP_DATA_FIRST_FRAG;
+			}
+			sp->some_taken = 1;
+		}
+	} else {
+		to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
+		if (to_move) {
+			/*-
+			 * We use a snapshot of length in case it
+			 * is expanding during the compare.
+			 */
+			uint32_t llen;
+
+			llen = length;
+			if (to_move >= llen) {
+				to_move = llen;
+				if (send_lock_up == 0) {
+					/*-
+					 * We are taking all of an incomplete msg
+					 * thus we need a send lock.
+					 */
+					SCTP_TCB_SEND_LOCK(stcb);
+					send_lock_up = 1;
+					if (sp->msg_is_complete) {
+						/* the sender finished the msg */
+						goto re_look;
+					}
+				}
+			}
+			if (sp->some_taken == 0) {
+				rcv_flags |= SCTP_DATA_FIRST_FRAG;
+				sp->some_taken = 1;
+			}
+		} else {
+			/* Nothing to take. */
+			*giveup = 1;
+			to_move = 0;
+			goto out_of;
+		}
+	}
+
+	/* If we reach here, we can copy out a chunk */
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* No chunk memory */
+		*giveup = 1;
+		to_move = 0;
+		goto out_of;
+	}
+	/* Setup for unordered if needed by looking
+	 * at the user sent info flags.
+	 */
+	if (sp->sinfo_flags & SCTP_UNORDERED) {
+		rcv_flags |= SCTP_DATA_UNORDERED;
+	}
+	if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
+	    (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
+		rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+	}
+	/* clear out the chunk before setting up */
+	memset(chk, 0, sizeof(*chk));
+	chk->rec.data.rcv_flags = rcv_flags;
+
+	if (to_move >= length) {
+		/* we think we can steal the whole thing */
+		if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
+			SCTP_TCB_SEND_LOCK(stcb);
+			send_lock_up = 1;
+		}
+		if (to_move < sp->length) {
+			/* bail, it changed */
+			goto dont_do_it;
+		}
+		chk->data = sp->data;
+		chk->last_mbuf = sp->tail_mbuf;
+		/* register the stealing */
+		sp->data = sp->tail_mbuf = NULL;
+	} else {
+		struct mbuf *m;
+	dont_do_it:
+		chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
+		chk->last_mbuf = NULL;
+		if (chk->data == NULL) {
+			sp->some_taken = some_taken;
+			sctp_free_a_chunk(stcb, chk, so_locked);
+			*bail = 1;
+			to_move = 0;
+			goto out_of;
+		}
+#ifdef SCTP_MBUF_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+			sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
+		}
+#endif
+		/* Pull off the data */
+		m_adj(sp->data, to_move);
+		/* Now lets work our way down and compact it */
+		m = sp->data;
+		while (m && (SCTP_BUF_LEN(m) == 0)) {
+			sp->data  = SCTP_BUF_NEXT(m);
+			SCTP_BUF_NEXT(m) = NULL;
+			if (sp->tail_mbuf == m) {
+				/*-
+				 * Freeing tail? TSNH since
+				 * we supposedly were taking less
+				 * than the sp->length.
+				 */
+#ifdef INVARIANTS
+				panic("Huh, freing tail? - TSNH");
+#else
+				SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
+				sp->tail_mbuf = sp->data = NULL;
+				sp->length = 0;
+#endif
+
+			}
+			sctp_m_free(m);
+			m = sp->data;
+		}
+	}
+	if (SCTP_BUF_IS_EXTENDED(chk->data)) {
+		chk->copy_by_ref = 1;
+	} else {
+		chk->copy_by_ref = 0;
+	}
+	/* get last_mbuf and counts of mb usage
+	 * This is ugly but hopefully its only one mbuf.
+	 */
+	if (chk->last_mbuf == NULL) {
+		chk->last_mbuf = chk->data;
+		while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
+			chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
+		}
+	}
+
+	if (to_move > length) {
+		/*- This should not happen either
+		 * since we always lower to_move to the size
+		 * of sp->length if its larger.
+		 */
+#ifdef INVARIANTS
+		panic("Huh, how can to_move be larger?");
+#else
+		SCTP_PRINTF("Huh, how can to_move be larger?\n");
+		sp->length = 0;
+#endif
+	} else {
+		atomic_subtract_int(&sp->length, to_move);
+	}
+	if (stcb->asoc.idata_supported == 0) {
+		leading = sizeof(struct sctp_data_chunk);
+	} else {
+		leading = sizeof(struct sctp_idata_chunk);
+	}
+	if (M_LEADINGSPACE(chk->data) < leading) {
+		/* Not enough room for a chunk header, get some */
+		struct mbuf *m;
+
+		m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
+		if (m == NULL) {
+			/*
+			 * we're in trouble here. _PREPEND below will free
+			 * all the data if there is no leading space, so we
+			 * must put the data back and restore.
+			 */
+			if (send_lock_up == 0) {
+				SCTP_TCB_SEND_LOCK(stcb);
+				send_lock_up = 1;
+			}
+			if (sp->data == NULL) {
+				/* unsteal the data */
+				sp->data = chk->data;
+				sp->tail_mbuf = chk->last_mbuf;
+			} else {
+				struct mbuf *m_tmp;
+				/* reassemble the data */
+				m_tmp = sp->data;
+				sp->data = chk->data;
+				SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
+			}
+			sp->some_taken = some_taken;
+			atomic_add_int(&sp->length, to_move);
+			chk->data = NULL;
+			*bail = 1;
+			sctp_free_a_chunk(stcb, chk, so_locked);
+			to_move = 0;
+			goto out_of;
+		} else {
+			SCTP_BUF_LEN(m) = 0;
+			SCTP_BUF_NEXT(m) = chk->data;
+			chk->data = m;
+			M_ALIGN(chk->data, 4);
+		}
+	}
+	if (stcb->asoc.idata_supported == 0) {
+		SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
+	} else {
+		SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
+	}
+	if (chk->data == NULL) {
+		/* HELP, TSNH since we assured it would not above? */
+#ifdef INVARIANTS
+		panic("prepend failes HELP?");
+#else
+		SCTP_PRINTF("prepend fails HELP?\n");
+		sctp_free_a_chunk(stcb, chk, so_locked);
+#endif
+		*bail = 1;
+		to_move = 0;
+		goto out_of;
+	}
+	if (stcb->asoc.idata_supported == 0) {
+		sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
+		chk->book_size = chk->send_size = (uint16_t)(to_move + sizeof(struct sctp_data_chunk));
+	} else {
+		sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
+		chk->book_size = chk->send_size = (uint16_t)(to_move + sizeof(struct sctp_idata_chunk));
+	}
+	chk->book_size_scale = 0;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->pad_inplace = 0;
+	chk->no_fr_allowed = 0;
+	if (stcb->asoc.idata_supported == 0) {
+		if (rcv_flags & SCTP_DATA_UNORDERED) {
+			/* Just use 0. The receiver ignores the values. */
+			chk->rec.data.mid = 0;
+		} else {
+			chk->rec.data.mid = strq->next_mid_ordered;
+			if (rcv_flags & SCTP_DATA_LAST_FRAG) {
+				strq->next_mid_ordered++;
+			}
+		}
+	} else {
+		if (rcv_flags & SCTP_DATA_UNORDERED) {
+			chk->rec.data.mid = strq->next_mid_unordered;
+			if (rcv_flags & SCTP_DATA_LAST_FRAG) {
+				strq->next_mid_unordered++;
+			}
+		} else {
+			chk->rec.data.mid = strq->next_mid_ordered;
+			if (rcv_flags & SCTP_DATA_LAST_FRAG) {
+				strq->next_mid_ordered++;
+			}
+		}
+	}
+	chk->rec.data.sid = sp->sid;
+	chk->rec.data.ppid = sp->ppid;
+	chk->rec.data.context = sp->context;
+	chk->rec.data.doing_fast_retransmit = 0;
+
+	chk->rec.data.timetodrop = sp->ts;
+	chk->flags = sp->act_flags;
+
+	if (sp->net) {
+		chk->whoTo = sp->net;
+		atomic_add_int(&chk->whoTo->ref_count, 1);
+	} else
+		chk->whoTo = NULL;
+
+	if (sp->holds_key_ref) {
+		chk->auth_keyid = sp->auth_keyid;
+		sctp_auth_key_acquire(stcb, chk->auth_keyid);
+		chk->holds_key_ref = 1;
+	}
+#if defined(__FreeBSD__) || defined(__Panda__)
+	chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
+#else
+	chk->rec.data.tsn = asoc->sending_seq++;
+#endif
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
+		sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
+		               (uint32_t)(uintptr_t)stcb, sp->length,
+		               (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
+		               chk->rec.data.tsn);
+	}
+	if (stcb->asoc.idata_supported == 0) {
+		dchkh = mtod(chk->data, struct sctp_data_chunk *);
+	} else {
+		ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
+	}
+	/*
+	 * Put the rest of the things in place now. Size was done
+	 * earlier in previous loop prior to padding.
+	 */
+
+#ifdef SCTP_ASOCLOG_OF_TSNS
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
+		asoc->tsn_out_at = 0;
+		asoc->tsn_out_wrapped = 1;
+	}
+	asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
+	asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
+	asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
+	asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
+	asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
+	asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
+	asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
+	asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
+	asoc->tsn_out_at++;
+#endif
+	if (stcb->asoc.idata_supported == 0) {
+		dchkh->ch.chunk_type = SCTP_DATA;
+		dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
+		dchkh->dp.tsn = htonl(chk->rec.data.tsn);
+		dchkh->dp.sid = htons(strq->sid);
+		dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
+		dchkh->dp.ppid = chk->rec.data.ppid;
+		dchkh->ch.chunk_length = htons(chk->send_size);
+	} else {
+		ndchkh->ch.chunk_type = SCTP_IDATA;
+		ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
+		ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
+		ndchkh->dp.sid = htons(strq->sid);
+		ndchkh->dp.reserved = htons(0);
+		ndchkh->dp.mid = htonl(chk->rec.data.mid);
+		if (sp->fsn == 0)
+			ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
+		else
+			ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
+		sp->fsn++;
+		ndchkh->ch.chunk_length = htons(chk->send_size);
+	}
+	/* Now advance the chk->send_size by the actual pad needed. */
+	if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
+		/* need a pad */
+		struct mbuf *lm;
+		int pads;
+
+		pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
+		lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
+		if (lm != NULL) {
+			chk->last_mbuf = lm;
+			chk->pad_inplace = 1;
+		}
+		chk->send_size += pads;
+	}
+	if (PR_SCTP_ENABLED(chk->flags)) {
+		asoc->pr_sctp_cnt++;
+	}
+	if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
+		/* All done pull and kill the message */
+		if (sp->put_last_out == 0) {
+			SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
+			SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
+			            sp->sender_all_done,
+			            sp->length,
+			            sp->msg_is_complete,
+			            sp->put_last_out,
+			            send_lock_up);
+		}
+		if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
+			SCTP_TCB_SEND_LOCK(stcb);
+			send_lock_up = 1;
+		}
+		atomic_subtract_int(&asoc->stream_queue_cnt, 1);
+		TAILQ_REMOVE(&strq->outqueue, sp, next);
+		stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
+		if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
+		    (strq->chunks_on_queues == 0) &&
+		    TAILQ_EMPTY(&strq->outqueue)) {
+			stcb->asoc.trigger_reset = 1;
+		}
+		if (sp->net) {
+			sctp_free_remote_addr(sp->net);
+			sp->net = NULL;
+		}
+		if (sp->data) {
+			sctp_m_freem(sp->data);
+			sp->data = NULL;
+		}
+		sctp_free_a_strmoq(stcb, sp, so_locked);
+	}
+	asoc->chunks_on_out_queue++;
+	strq->chunks_on_queues++;
+	TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
+	asoc->send_queue_cnt++;
+out_of:
+	if (send_lock_up) {
+		SCTP_TCB_SEND_UNLOCK(stcb);
+	}
+	return (to_move);
+}
+
+
+static void
+sctp_fill_outqueue(struct sctp_tcb *stcb,
+    struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+	SCTP_UNUSED
+#endif
+)
+{
+	struct sctp_association *asoc;
+	struct sctp_stream_out *strq;
+	int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
+	int giveup;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	asoc = &stcb->asoc;
+	switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+		case AF_INET:
+			goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+			goal_mtu = net->mtu - sizeof(struct sctphdr);
+			break;
+#endif
+		default:
+			/* TSNH */
+			goal_mtu = net->mtu;
+			break;
+	}
+	/* Need an allowance for the data chunk header too */
+	if (stcb->asoc.idata_supported == 0) {
+		goal_mtu -= sizeof(struct sctp_data_chunk);
+	} else {
+		goal_mtu -= sizeof(struct sctp_idata_chunk);
+	}
+
+	/* must make even word boundary */
+	goal_mtu &= 0xfffffffc;
+	strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
+	while ((goal_mtu > 0) && strq) {
+		giveup = 0;
+		bail = 0;
+		moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, 
+						       &giveup, eeor_mode, &bail, so_locked);
+		stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
+
+		if ((giveup) || bail) {
+			break;
+		}
+		strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
+		if (strq == NULL) {
+			break;
+		}
+		total_moved += moved_how_much;
+		goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
+		goal_mtu &= 0xfffffffc;
+	}
+	if (bail)
+		*quit_now = 1;
+
+	stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
+
+	if (total_moved == 0) {
+		if ((stcb->asoc.sctp_cmt_on_off == 0) &&
+		    (net == stcb->asoc.primary_destination)) {
+			/* ran dry for primary network net */
+			SCTP_STAT_INCR(sctps_primary_randry);
+		} else if (stcb->asoc.sctp_cmt_on_off > 0) {
+			/* ran dry with CMT on */
+			SCTP_STAT_INCR(sctps_cmt_randry);
+		}
+	}
+}
+
+void
+sctp_fix_ecn_echo(struct sctp_association *asoc)
+{
+	struct sctp_tmit_chunk *chk;
+
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
+			chk->sent = SCTP_DATAGRAM_UNSENT;
+		}
+	}
+}
+
+void
+sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_stream_queue_pending *sp;
+	unsigned int i;
+
+	if (net == NULL) {
+		return;
+	}
+	asoc = &stcb->asoc;
+	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+		TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
+			if (sp->net == net) {
+				sctp_free_remote_addr(sp->net);
+				sp->net = NULL;
+			}
+		}
+	}
+	TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
+		if (chk->whoTo == net) {
+			sctp_free_remote_addr(chk->whoTo);
+			chk->whoTo = NULL;
+		}
+	}
+}
+
+int
+sctp_med_chunk_output(struct sctp_inpcb *inp,
+		      struct sctp_tcb *stcb,
+		      struct sctp_association *asoc,
+		      int *num_out,
+		      int *reason_code,
+		      int control_only, int from_where,
+		      struct timeval *now, int *now_filled, int frag_point, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+		      SCTP_UNUSED
+#endif
+	)
+{
+	/**
+	 * Ok this is the generic chunk service queue. we must do the
+	 * following:
+	 * - Service the stream queue that is next, moving any
+	 *   message (note I must get a complete message i.e. FIRST/MIDDLE and
+	 *   LAST to the out queue in one pass) and assigning TSN's. This
+	 *   only applys though if the peer does not support NDATA. For NDATA
+	 *   chunks its ok to not send the entire message ;-)
+	 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
+	 *   fomulate and send the low level chunks. Making sure to combine
+	 *   any control in the control chunk queue also.
+	 */
+	struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
+	struct mbuf *outchain, *endoutchain;
+	struct sctp_tmit_chunk *chk, *nchk;
+
+	/* temp arrays for unlinking */
+	struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
+	int no_fragmentflg, error;
+	unsigned int max_rwnd_per_dest, max_send_per_dest;
+	int one_chunk, hbflag, skip_data_for_this_net;
+	int asconf, cookie, no_out_cnt;
+	int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
+	unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
+	int tsns_sent = 0;
+	uint32_t auth_offset = 0;
+	struct sctp_auth_chunk *auth = NULL;
+	uint16_t auth_keyid;
+	int override_ok = 1;
+	int skip_fill_up = 0;
+	int data_auth_reqd = 0;
+	/* JRS 5/14/07 - Add flag for whether a heartbeat is sent to
+	   the destination. */
+	int quit_now = 0;
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	*num_out = 0;
+	*reason_code = 0;
+	auth_keyid = stcb->asoc.authinfo.active_keyid;
+	if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
+	    (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
+	    (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
+		eeor_mode = 1;
+	} else {
+		eeor_mode = 0;
+	}
+	ctl_cnt = no_out_cnt = asconf = cookie = 0;
+	/*
+	 * First lets prime the pump. For each destination, if there is room
+	 * in the flight size, attempt to pull an MTU's worth out of the
+	 * stream queues into the general send_queue
+	 */
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_audit_log(0xC2, 2);
+#endif
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	hbflag = 0;
+	if (control_only)
+		no_data_chunks = 1;
+	else
+		no_data_chunks = 0;
+
+	/* Nothing to possible to send? */
+	if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
+	     (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
+	    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+	    TAILQ_EMPTY(&asoc->send_queue) &&
+	    sctp_is_there_unsent_data(stcb, so_locked) == 0) {
+	nothing_to_send:
+		*reason_code = 9;
+		return (0);
+	}
+	if (asoc->peers_rwnd == 0) {
+		/* No room in peers rwnd */
+		*reason_code = 1;
+		if (asoc->total_flight > 0) {
+			/* we are allowed one chunk in flight */
+			no_data_chunks = 1;
+		}
+	}
+	if (stcb->asoc.ecn_echo_cnt_onq) {
+		/* Record where a sack goes, if any */
+		if (no_data_chunks &&
+		    (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
+			/* Nothing but ECNe to send - we don't do that */
+			goto nothing_to_send;
+		}
+		TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+			if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+			    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
+				sack_goes_to = chk->whoTo;
+				break;
+			}
+		}
+	}
+	max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
+	if (stcb->sctp_socket)
+		max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
+	else
+		max_send_per_dest = 0;
+	if (no_data_chunks == 0) {
+		/* How many non-directed chunks are there? */
+		TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
+			if (chk->whoTo == NULL) {
+				/* We already have non-directed
+				 * chunks on the queue, no need
+				 * to do a fill-up.
+				 */
+				skip_fill_up = 1;
+				break;
+			}
+		}
+
+	}
+	if ((no_data_chunks == 0) &&
+	    (skip_fill_up == 0) &&
+	    (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
+		TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+			/*
+			 * This for loop we are in takes in
+			 * each net, if its's got space in cwnd and
+			 * has data sent to it (when CMT is off) then it
+			 * calls sctp_fill_outqueue for the net. This gets
+			 * data on the send queue for that network.
+			 *
+			 * In sctp_fill_outqueue TSN's are assigned and
+			 * data is copied out of the stream buffers. Note
+			 * mostly copy by reference (we hope).
+			 */
+			net->window_probe = 0;
+			if ((net != stcb->asoc.alternate) &&
+			    ((net->dest_state & SCTP_ADDR_PF) ||
+			     (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
+			     (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+					sctp_log_cwnd(stcb, net, 1,
+						      SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+				}
+			        continue;
+			}
+			if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
+			    (net->flight_size == 0)) {
+				(*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins)(stcb, net);
+			}
+			if (net->flight_size >= net->cwnd) {
+				/* skip this network, no room - can't fill */
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+					sctp_log_cwnd(stcb, net, 3,
+						      SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+				}
+				continue;
+			}
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+				sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
+			}
+			sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
+			if (quit_now) {
+				/* memory alloc failure */
+				no_data_chunks = 1;
+				break;
+			}
+		}
+	}
+	/* now service each destination and send out what we can for it */
+	/* Nothing to send? */
+	if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+	    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+	    TAILQ_EMPTY(&asoc->send_queue)) {
+		*reason_code = 8;
+		return (0);
+	}
+
+	if (asoc->sctp_cmt_on_off > 0) {
+		/* get the last start point */
+		start_at = asoc->last_net_cmt_send_started;
+		if (start_at == NULL) {
+			/* null so to beginning */
+			start_at = TAILQ_FIRST(&asoc->nets);
+		} else {
+			start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
+			if (start_at == NULL) {
+				start_at = TAILQ_FIRST(&asoc->nets);
+			}
+		}
+		asoc->last_net_cmt_send_started = start_at;
+	} else {
+		start_at = TAILQ_FIRST(&asoc->nets);
+	}
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if (chk->whoTo == NULL) {
+			if (asoc->alternate) {
+				chk->whoTo = asoc->alternate;
+			} else {
+				chk->whoTo = asoc->primary_destination;
+			}
+			atomic_add_int(&chk->whoTo->ref_count, 1);
+		}
+	}
+	old_start_at = NULL;
+again_one_more_time:
+	for (net = start_at ; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
+		/* how much can we send? */
+		/* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
+		if (old_start_at && (old_start_at == net)) {
+			/* through list ocmpletely. */
+			break;
+		}
+		tsns_sent = 0xa;
+		if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+		    TAILQ_EMPTY(&asoc->asconf_send_queue) &&
+		    (net->flight_size >= net->cwnd)) {
+			/* Nothing on control or asconf and flight is full, we can skip
+			 * even in the CMT case.
+			 */
+			continue;
+		}
+		bundle_at = 0;
+		endoutchain = outchain = NULL;
+		no_fragmentflg = 1;
+		one_chunk = 0;
+		if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
+			skip_data_for_this_net = 1;
+		} else {
+			skip_data_for_this_net = 0;
+		}
+		switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
+#ifdef INET
+		case AF_INET:
+			mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			mtu = net->mtu - SCTP_MIN_OVERHEAD;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+			mtu = net->mtu - sizeof(struct sctphdr);
+			break;
+#endif
+		default:
+			/* TSNH */
+			mtu = net->mtu;
+			break;
+		}
+		mx_mtu = mtu;
+		to_out = 0;
+		if (mtu > asoc->peers_rwnd) {
+			if (asoc->total_flight > 0) {
+				/* We have a packet in flight somewhere */
+				r_mtu = asoc->peers_rwnd;
+			} else {
+				/* We are always allowed to send one MTU out */
+				one_chunk = 1;
+				r_mtu = mtu;
+			}
+		} else {
+			r_mtu = mtu;
+		}
+		error = 0;
+		/************************/
+		/* ASCONF transmission */
+		/************************/
+		/* Now first lets go through the asconf queue */
+		TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
+			if (chk->rec.chunk_id.id != SCTP_ASCONF) {
+				continue;
+			}
+			if (chk->whoTo == NULL) {
+				if (asoc->alternate == NULL) {
+					if (asoc->primary_destination != net) {
+						break;
+					}
+				} else {
+					if (asoc->alternate != net) {
+						break;
+					}
+				}
+			} else {
+				if (chk->whoTo != net) {
+					break;
+				}
+			}
+			if (chk->data == NULL) {
+				break;
+			}
+			if (chk->sent != SCTP_DATAGRAM_UNSENT &&
+			    chk->sent != SCTP_DATAGRAM_RESEND) {
+				break;
+			}
+			/*
+			 * if no AUTH is yet included and this chunk
+			 * requires it, make sure to account for it.  We
+			 * don't apply the size until the AUTH chunk is
+			 * actually added below in case there is no room for
+			 * this chunk. NOTE: we overload the use of "omtu"
+			 * here
+			 */
+			if ((auth == NULL) &&
+			    sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+							stcb->asoc.peer_auth_chunks)) {
+				omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+			} else
+				omtu = 0;
+			/* Here we do NOT factor the r_mtu */
+			if ((chk->send_size < (int)(mtu - omtu)) ||
+			    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+				/*
+				 * We probably should glom the mbuf chain
+				 * from the chk->data for control but the
+				 * problem is it becomes yet one more level
+				 * of tracking to do if for some reason
+				 * output fails. Then I have got to
+				 * reconstruct the merged control chain.. el
+				 * yucko.. for now we take the easy way and
+				 * do the copy
+				 */
+				/*
+				 * Add an AUTH chunk, if chunk requires it
+				 * save the offset into the chain for AUTH
+				 */
+				if ((auth == NULL) &&
+				    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+								 stcb->asoc.peer_auth_chunks))) {
+					outchain = sctp_add_auth_chunk(outchain,
+								       &endoutchain,
+								       &auth,
+								       &auth_offset,
+								       stcb,
+								       chk->rec.chunk_id.id);
+					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+				}
+				outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
+							       (int)chk->rec.chunk_id.can_take_data,
+							       chk->send_size, chk->copy_by_ref);
+				if (outchain == NULL) {
+					*reason_code = 8;
+					SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+					return (ENOMEM);
+				}
+				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+				/* update our MTU size */
+				if (mtu > (chk->send_size + omtu))
+					mtu -= (chk->send_size + omtu);
+				else
+					mtu = 0;
+				to_out += (chk->send_size + omtu);
+				/* Do clear IP_DF ? */
+				if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+					no_fragmentflg = 0;
+				}
+				if (chk->rec.chunk_id.can_take_data)
+					chk->data = NULL;
+				/*
+				 * set hb flag since we can
+				 * use these for RTO
+				 */
+				hbflag = 1;
+				asconf = 1;
+				/*
+				 * should sysctl this: don't
+				 * bundle data with ASCONF
+				 * since it requires AUTH
+				 */
+				no_data_chunks = 1;
+				chk->sent = SCTP_DATAGRAM_SENT;
+				if (chk->whoTo == NULL) {
+					chk->whoTo = net;
+					atomic_add_int(&net->ref_count, 1);
+				}
+				chk->snd_count++;
+				if (mtu == 0) {
+					/*
+					 * Ok we are out of room but we can
+					 * output without effecting the
+					 * flight size since this little guy
+					 * is a control only packet.
+					 */
+					sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
+					/*
+					 * do NOT clear the asconf
+					 * flag as it is used to do
+					 * appropriate source address
+					 * selection.
+					 */
+					if (*now_filled == 0) {
+						(void)SCTP_GETTIME_TIMEVAL(now);
+						*now_filled = 1;
+					}
+					net->last_sent_time = *now;
+					hbflag = 0;
+					if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+					                                        (struct sockaddr *)&net->ro._l_addr,
+					                                        outchain, auth_offset, auth,
+					                                        stcb->asoc.authinfo.active_keyid,
+					                                        no_fragmentflg, 0, asconf,
+					                                        inp->sctp_lport, stcb->rport,
+					                                        htonl(stcb->asoc.peer_vtag),
+					                                        net->port, NULL,
+#if defined(__FreeBSD__)
+					                                        0, 0,
+#endif
+					                                        so_locked))) {
+						/* error, we could not output */
+						SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+						if (from_where == 0) {
+							SCTP_STAT_INCR(sctps_lowlevelerrusr);
+						}
+						if (error == ENOBUFS) {
+							asoc->ifp_had_enobuf = 1;
+							SCTP_STAT_INCR(sctps_lowlevelerr);
+						}
+						/* error, could not output */
+						if (error == EHOSTUNREACH) {
+							/*
+							 * Destination went
+							 * unreachable
+							 * during this send
+							 */
+							sctp_move_chunks_from_net(stcb, net);
+						}
+						*reason_code = 7;
+						break;
+					} else {
+						asoc->ifp_had_enobuf = 0;
+					}
+					/*
+					 * increase the number we sent, if a
+					 * cookie is sent we don't tell them
+					 * any was sent out.
+					 */
+					outchain = endoutchain = NULL;
+					auth = NULL;
+					auth_offset = 0;
+					if (!no_out_cnt)
+						*num_out += ctl_cnt;
+					/* recalc a clean slate and setup */
+					switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+						case AF_INET:
+							mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+							break;
+#endif
+#ifdef INET6
+						case AF_INET6:
+							mtu = net->mtu - SCTP_MIN_OVERHEAD;
+							break;
+#endif
+#if defined(__Userspace__)
+						case AF_CONN:
+							mtu = net->mtu - sizeof(struct sctphdr);
+							break;
+#endif
+						default:
+							/* TSNH */
+							mtu = net->mtu;
+							break;
+					}
+					to_out = 0;
+					no_fragmentflg = 1;
+				}
+			}
+		}
+		if (error != 0) {
+			/* try next net */
+			continue;
+		}
+		/************************/
+		/* Control transmission */
+		/************************/
+		/* Now first lets go through the control queue */
+		TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
+			if ((sack_goes_to) &&
+			    (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
+			    (chk->whoTo != sack_goes_to)) {
+				/*
+				 * if we have a sack in queue, and we are looking at an
+				 * ecn echo that is NOT queued to where the sack is going..
+				 */
+				if (chk->whoTo == net) {
+					/* Don't transmit it to where its going (current net) */
+					continue;
+				} else if (sack_goes_to == net) {
+					/* But do transmit it to this address */
+					goto skip_net_check;
+				}
+			}
+			if (chk->whoTo == NULL) {
+				if (asoc->alternate == NULL) {
+					if (asoc->primary_destination != net) {
+						continue;
+					}
+				} else {
+					if (asoc->alternate != net) {
+						continue;
+					}
+				}
+			} else {
+				if (chk->whoTo != net) {
+					continue;
+				}
+			}
+		skip_net_check:
+			if (chk->data == NULL) {
+				continue;
+			}
+			if (chk->sent != SCTP_DATAGRAM_UNSENT) {
+				/*
+				 * It must be unsent. Cookies and ASCONF's
+				 * hang around but there timers will force
+				 * when marked for resend.
+				 */
+				continue;
+			}
+			/*
+			 * if no AUTH is yet included and this chunk
+			 * requires it, make sure to account for it.  We
+			 * don't apply the size until the AUTH chunk is
+			 * actually added below in case there is no room for
+			 * this chunk. NOTE: we overload the use of "omtu"
+			 * here
+			 */
+			if ((auth == NULL) &&
+			    sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+							stcb->asoc.peer_auth_chunks)) {
+				omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+			} else
+				omtu = 0;
+			/* Here we do NOT factor the r_mtu */
+			if ((chk->send_size <= (int)(mtu - omtu)) ||
+			    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+				/*
+				 * We probably should glom the mbuf chain
+				 * from the chk->data for control but the
+				 * problem is it becomes yet one more level
+				 * of tracking to do if for some reason
+				 * output fails. Then I have got to
+				 * reconstruct the merged control chain.. el
+				 * yucko.. for now we take the easy way and
+				 * do the copy
+				 */
+				/*
+				 * Add an AUTH chunk, if chunk requires it
+				 * save the offset into the chain for AUTH
+				 */
+				if ((auth == NULL) &&
+				    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+								 stcb->asoc.peer_auth_chunks))) {
+					outchain = sctp_add_auth_chunk(outchain,
+								       &endoutchain,
+								       &auth,
+								       &auth_offset,
+								       stcb,
+								       chk->rec.chunk_id.id);
+					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+				}
+				outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
+							       (int)chk->rec.chunk_id.can_take_data,
+							       chk->send_size, chk->copy_by_ref);
+				if (outchain == NULL) {
+					*reason_code = 8;
+					SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+					return (ENOMEM);
+				}
+				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+				/* update our MTU size */
+				if (mtu > (chk->send_size + omtu))
+					mtu -= (chk->send_size + omtu);
+				else
+					mtu = 0;
+				to_out += (chk->send_size + omtu);
+				/* Do clear IP_DF ? */
+				if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+					no_fragmentflg = 0;
+				}
+				if (chk->rec.chunk_id.can_take_data)
+					chk->data = NULL;
+				/* Mark things to be removed, if needed */
+				if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+				    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
+				    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
+				    (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
+				    (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
+				    (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
+				    (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
+				    (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
+				    (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
+				    (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
+				    (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
+					if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
+						hbflag = 1;
+					}
+					/* remove these chunks at the end */
+					if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
+					    (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
+						/* turn off the timer */
+						if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
+							sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+									inp, stcb, net,
+							                SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
+						}
+					}
+					ctl_cnt++;
+				} else {
+					/*
+					 * Other chunks, since they have
+					 * timers running (i.e. COOKIE)
+					 * we just "trust" that it
+					 * gets sent or retransmitted.
+					 */
+					ctl_cnt++;
+					if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+						cookie = 1;
+						no_out_cnt = 1;
+					} else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
+						/*
+						 * Increment ecne send count here
+						 * this means we may be over-zealous in
+						 * our counting if the send fails, but its
+						 * the best place to do it (we used to do
+						 * it in the queue of the chunk, but that did
+						 * not tell how many times it was sent.
+						 */
+						SCTP_STAT_INCR(sctps_sendecne);
+					}
+					chk->sent = SCTP_DATAGRAM_SENT;
+					if (chk->whoTo == NULL) {
+						chk->whoTo = net;
+						atomic_add_int(&net->ref_count, 1);
+					}
+					chk->snd_count++;
+				}
+				if (mtu == 0) {
+					/*
+					 * Ok we are out of room but we can
+					 * output without effecting the
+					 * flight size since this little guy
+					 * is a control only packet.
+					 */
+					if (asconf) {
+						sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
+						/*
+						 * do NOT clear the asconf
+						 * flag as it is used to do
+						 * appropriate source address
+						 * selection.
+						 */
+					}
+					if (cookie) {
+						sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
+						cookie = 0;
+					}
+					/* Only HB or ASCONF advances time */
+					if (hbflag) {
+						if (*now_filled == 0) {
+							(void)SCTP_GETTIME_TIMEVAL(now);
+							*now_filled = 1;
+						}
+						net->last_sent_time = *now;
+						hbflag = 0;
+					}
+					if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+					                                        (struct sockaddr *)&net->ro._l_addr,
+					                                        outchain,
+					                                        auth_offset, auth,
+					                                        stcb->asoc.authinfo.active_keyid,
+					                                        no_fragmentflg, 0, asconf,
+					                                        inp->sctp_lport, stcb->rport,
+					                                        htonl(stcb->asoc.peer_vtag),
+					                                        net->port, NULL,
+#if defined(__FreeBSD__)
+					                                        0, 0,
+#endif
+					                                        so_locked))) {
+						/* error, we could not output */
+						SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+						if (from_where == 0) {
+							SCTP_STAT_INCR(sctps_lowlevelerrusr);
+						}
+						if (error == ENOBUFS) {
+							asoc->ifp_had_enobuf = 1;
+							SCTP_STAT_INCR(sctps_lowlevelerr);
+						}
+						if (error == EHOSTUNREACH) {
+							/*
+							 * Destination went
+							 * unreachable
+							 * during this send
+							 */
+							sctp_move_chunks_from_net(stcb, net);
+						}
+						*reason_code = 7;
+						break;
+					} else {
+						asoc->ifp_had_enobuf = 0;
+					}
+					/*
+					 * increase the number we sent, if a
+					 * cookie is sent we don't tell them
+					 * any was sent out.
+					 */
+					outchain = endoutchain = NULL;
+					auth = NULL;
+					auth_offset = 0;
+					if (!no_out_cnt)
+						*num_out += ctl_cnt;
+					/* recalc a clean slate and setup */
+					switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+						case AF_INET:
+							mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+							break;
+#endif
+#ifdef INET6
+						case AF_INET6:
+							mtu = net->mtu - SCTP_MIN_OVERHEAD;
+							break;
+#endif
+#if defined(__Userspace__)
+						case AF_CONN:
+							mtu = net->mtu - sizeof(struct sctphdr);
+							break;
+#endif
+						default:
+							/* TSNH */
+							mtu = net->mtu;
+							break;
+					}
+					to_out = 0;
+					no_fragmentflg = 1;
+				}
+			}
+		}
+		if (error != 0) {
+			/* try next net */
+			continue;
+		}
+		/* JRI: if dest is in PF state, do not send data to it */
+		if ((asoc->sctp_cmt_on_off > 0) &&
+		    (net != stcb->asoc.alternate) &&
+		    (net->dest_state & SCTP_ADDR_PF)) {
+			goto no_data_fill;
+		}
+		if (net->flight_size >= net->cwnd) {
+			goto no_data_fill;
+		}
+		if ((asoc->sctp_cmt_on_off > 0) &&
+		    (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
+		    (net->flight_size > max_rwnd_per_dest)) {
+			goto no_data_fill;
+		}
+		/*
+		 * We need a specific accounting for the usage of the
+		 * send buffer. We also need to check the number of messages
+		 * per net. For now, this is better than nothing and it
+		 * disabled by default...
+		 */
+		if ((asoc->sctp_cmt_on_off > 0) &&
+		    (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
+		    (max_send_per_dest > 0) &&
+		    (net->flight_size > max_send_per_dest)) {
+			goto no_data_fill;
+		}
+		/*********************/
+		/* Data transmission */
+		/*********************/
+		/*
+		 * if AUTH for DATA is required and no AUTH has been added
+		 * yet, account for this in the mtu now... if no data can be
+		 * bundled, this adjustment won't matter anyways since the
+		 * packet will be going out...
+		 */
+		data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
+							     stcb->asoc.peer_auth_chunks);
+		if (data_auth_reqd && (auth == NULL)) {
+			mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+		}
+		/* now lets add any data within the MTU constraints */
+		switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
+#ifdef INET
+		case AF_INET:
+			if (net->mtu > SCTP_MIN_V4_OVERHEAD)
+				omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+			else
+				omtu = 0;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+			if (net->mtu > SCTP_MIN_OVERHEAD)
+				omtu = net->mtu - SCTP_MIN_OVERHEAD;
+			else
+				omtu = 0;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+			if (net->mtu > sizeof(struct sctphdr)) {
+				omtu = net->mtu - sizeof(struct sctphdr);
+			} else {
+				omtu = 0;
+			}
+			break;
+#endif
+		default:
+			/* TSNH */
+			omtu = 0;
+			break;
+		}
+		if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
+		      (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
+		     (skip_data_for_this_net == 0)) ||
+		    (cookie)) {
+			TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
+				if (no_data_chunks) {
+					/* let only control go out */
+					*reason_code = 1;
+					break;
+				}
+				if (net->flight_size >= net->cwnd) {
+					/* skip this net, no room for data */
+					*reason_code = 2;
+					break;
+				}
+				if ((chk->whoTo != NULL) &&
+				    (chk->whoTo != net)) {
+					/* Don't send the chunk on this net */
+					continue;
+				}
+
+				if (asoc->sctp_cmt_on_off == 0) {
+					if ((asoc->alternate) &&
+					    (asoc->alternate != net) &&
+					    (chk->whoTo == NULL)) {
+						continue;
+					} else if ((net != asoc->primary_destination) &&
+						   (asoc->alternate == NULL) &&
+						   (chk->whoTo == NULL)) {
+						continue;
+					}
+				}
+				if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
+					/*-
+					 * strange, we have a chunk that is
+					 * to big for its destination and
+					 * yet no fragment ok flag.
+					 * Something went wrong when the
+					 * PMTU changed...we did not mark
+					 * this chunk for some reason?? I
+					 * will fix it here by letting IP
+					 * fragment it for now and printing
+					 * a warning. This really should not
+					 * happen ...
+					 */
+					SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
+						    chk->send_size, mtu);
+					chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
+				}
+				if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
+				    ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
+					struct sctp_data_chunk *dchkh;
+
+					dchkh = mtod(chk->data, struct sctp_data_chunk *);
+					dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
+				}
+				if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
+				    ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
+					/* ok we will add this one */
+
+					/*
+					 * Add an AUTH chunk, if chunk
+					 * requires it, save the offset into
+					 * the chain for AUTH
+					 */
+					if (data_auth_reqd) {
+						if (auth == NULL) {
+							outchain = sctp_add_auth_chunk(outchain,
+										       &endoutchain,
+										       &auth,
+										       &auth_offset,
+										       stcb,
+										       SCTP_DATA);
+							auth_keyid = chk->auth_keyid;
+							override_ok = 0;
+							SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+						} else if (override_ok) {
+							/* use this data's keyid */
+							auth_keyid = chk->auth_keyid;
+							override_ok = 0;
+						} else if (auth_keyid != chk->auth_keyid) {
+							/* different keyid, so done bundling */
+							break;
+						}
+					}
+					outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
+								       chk->send_size, chk->copy_by_ref);
+					if (outchain == NULL) {
+						SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
+						if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+							sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+						}
+						*reason_code = 3;
+						SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+						return (ENOMEM);
+					}
+					/* upate our MTU size */
+					/* Do clear IP_DF ? */
+					if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+						no_fragmentflg = 0;
+					}
+					/* unsigned subtraction of mtu */
+					if (mtu > chk->send_size)
+						mtu -= chk->send_size;
+					else
+						mtu = 0;
+					/* unsigned subtraction of r_mtu */
+					if (r_mtu > chk->send_size)
+						r_mtu -= chk->send_size;
+					else
+						r_mtu = 0;
+
+					to_out += chk->send_size;
+					if ((to_out > mx_mtu) && no_fragmentflg) {
+#ifdef INVARIANTS
+						panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
+#else
+						SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
+							    mx_mtu, to_out);
+#endif
+					}
+					chk->window_probe = 0;
+					data_list[bundle_at++] = chk;
+					if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
+						break;
+					}
+					if (chk->sent == SCTP_DATAGRAM_UNSENT) {
+						if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
+							SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
+						} else {
+							SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
+						}
+						if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
+						    ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
+							/* Count number of user msg's that were fragmented
+							 * we do this by counting when we see a LAST fragment
+							 * only.
+							 */
+							SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
+					}
+					if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
+						if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
+							data_list[0]->window_probe = 1;
+							net->window_probe = 1;
+						}
+						break;
+					}
+				} else {
+					/*
+					 * Must be sent in order of the
+					 * TSN's (on a network)
+					 */
+					break;
+				}
+			}	/* for (chunk gather loop for this net) */
+		}		/* if asoc.state OPEN */
+	no_data_fill:
+		/* Is there something to send for this destination? */
+		if (outchain) {
+			/* We may need to start a control timer or two */
+			if (asconf) {
+				sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
+						 stcb, net);
+				/*
+				 * do NOT clear the asconf flag as it is used
+				 * to do appropriate source address selection.
+				 */
+			}
+			if (cookie) {
+				sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
+				cookie = 0;
+			}
+			/* must start a send timer if data is being sent */
+			if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
+				/*
+				 * no timer running on this destination
+				 * restart it.
+				 */
+				sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+			}
+			if (bundle_at || hbflag) {
+				/* For data/asconf and hb set time */
+				if (*now_filled == 0) {
+					(void)SCTP_GETTIME_TIMEVAL(now);
+					*now_filled = 1;
+				}
+				net->last_sent_time = *now;
+			}
+			/* Now send it, if there is anything to send :> */
+			if ((error = sctp_lowlevel_chunk_output(inp,
+			                                        stcb,
+			                                        net,
+			                                        (struct sockaddr *)&net->ro._l_addr,
+			                                        outchain,
+			                                        auth_offset,
+			                                        auth,
+			                                        auth_keyid,
+			                                        no_fragmentflg,
+			                                        bundle_at,
+			                                        asconf,
+			                                        inp->sctp_lport, stcb->rport,
+			                                        htonl(stcb->asoc.peer_vtag),
+			                                        net->port, NULL,
+#if defined(__FreeBSD__)
+			                                        0, 0,
+#endif
+			                                        so_locked))) {
+				/* error, we could not output */
+				SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+				if (from_where == 0) {
+					SCTP_STAT_INCR(sctps_lowlevelerrusr);
+				}
+				if (error == ENOBUFS) {
+					asoc->ifp_had_enobuf = 1;
+					SCTP_STAT_INCR(sctps_lowlevelerr);
+				}
+				if (error == EHOSTUNREACH) {
+					/*
+					 * Destination went unreachable
+					 * during this send
+					 */
+					sctp_move_chunks_from_net(stcb, net);
+				}
+				*reason_code = 6;
+				/*-
+				 * I add this line to be paranoid. As far as
+				 * I can tell the continue, takes us back to
+				 * the top of the for, but just to make sure
+				 * I will reset these again here.
+				 */
+				ctl_cnt = bundle_at = 0;
+				continue; /* This takes us back to the for() for the nets. */
+			} else {
+				asoc->ifp_had_enobuf = 0;
+			}
+			endoutchain = NULL;
+			auth = NULL;
+			auth_offset = 0;
+			if (!no_out_cnt) {
+				*num_out += (ctl_cnt + bundle_at);
+			}
+			if (bundle_at) {
+				/* setup for a RTO measurement */
+				tsns_sent = data_list[0]->rec.data.tsn;
+				/* fill time if not already filled */
+				if (*now_filled == 0) {
+					(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
+					*now_filled = 1;
+					*now = asoc->time_last_sent;
+				} else {
+					asoc->time_last_sent = *now;
+				}
+				if (net->rto_needed) {
+					data_list[0]->do_rtt = 1;
+					net->rto_needed = 0;
+				}
+				SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
+				sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
+			}
+			if (one_chunk) {
+				break;
+			}
+		}
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+			sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
+		}
+	}
+	if (old_start_at == NULL) {
+		old_start_at = start_at;
+		start_at = TAILQ_FIRST(&asoc->nets);
+		if (old_start_at)
+			goto again_one_more_time;
+	}
+
+	/*
+	 * At the end there should be no NON timed chunks hanging on this
+	 * queue.
+	 */
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+		sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
+	}
+	if ((*num_out == 0) && (*reason_code == 0)) {
+		*reason_code = 4;
+	} else {
+		*reason_code = 5;
+	}
+	sctp_clean_up_ctl(stcb, asoc, so_locked);
+	return (0);
+}
+
+void
+sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
+{
+	/*-
+	 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
+	 * the control chunk queue.
+	 */
+	struct sctp_chunkhdr *hdr;
+	struct sctp_tmit_chunk *chk;
+	struct mbuf *mat, *last_mbuf;
+	uint32_t chunk_length;
+	uint16_t padding_length;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
+	if (op_err == NULL) {
+		return;
+	}
+	last_mbuf = NULL;
+	chunk_length = 0;
+	for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
+		chunk_length += SCTP_BUF_LEN(mat);
+		if (SCTP_BUF_NEXT(mat) == NULL) {
+			last_mbuf = mat;
+		}
+	}
+	if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
+		sctp_m_freem(op_err);
+		return;
+	}
+	padding_length = chunk_length % 4;
+	if (padding_length != 0) {
+		padding_length = 4 - padding_length;
+	}
+	if (padding_length != 0) {
+		if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
+			sctp_m_freem(op_err);
+			return;
+		}
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(op_err);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->send_size = (uint16_t)chunk_length;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->asoc = &stcb->asoc;
+	chk->data = op_err;
+	chk->whoTo = NULL;
+	chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
+	chk->rec.chunk_id.can_take_data = 0;
+	hdr = mtod(op_err, struct sctp_chunkhdr *);
+	hdr->chunk_type = SCTP_OPERATION_ERROR;
+	hdr->chunk_flags = 0;
+	hdr->chunk_length = htons(chk->send_size);
+	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+}
+
+int
+sctp_send_cookie_echo(struct mbuf *m,
+    int offset,
+    struct sctp_tcb *stcb,
+    struct sctp_nets *net)
+{
+	/*-
+	 * pull out the cookie and put it at the front of the control chunk
+	 * queue.
+	 */
+	int at;
+	struct mbuf *cookie;
+	struct sctp_paramhdr parm, *phdr;
+	struct sctp_chunkhdr *hdr;
+	struct sctp_tmit_chunk *chk;
+	uint16_t ptype, plen;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	/* First find the cookie in the param area */
+	cookie = NULL;
+	at = offset + sizeof(struct sctp_init_chunk);
+	for (;;) {
+		phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
+		if (phdr == NULL) {
+			return (-3);
+		}
+		ptype = ntohs(phdr->param_type);
+		plen = ntohs(phdr->param_length);
+		if (ptype == SCTP_STATE_COOKIE) {
+			int pad;
+
+			/* found the cookie */
+			if ((pad = (plen % 4))) {
+				plen += 4 - pad;
+			}
+			cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
+			if (cookie == NULL) {
+				/* No memory */
+				return (-2);
+			}
+#ifdef SCTP_MBUF_LOGGING
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+				sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
+			}
+#endif
+			break;
+		}
+		at += SCTP_SIZE32(plen);
+	}
+	/* ok, we got the cookie lets change it into a cookie echo chunk */
+	/* first the change from param to cookie */
+	hdr = mtod(cookie, struct sctp_chunkhdr *);
+	hdr->chunk_type = SCTP_COOKIE_ECHO;
+	hdr->chunk_flags = 0;
+	/* get the chunk stuff now and place it in the FRONT of the queue */
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(cookie);
+		return (-5);
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
+	chk->send_size = plen;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->asoc = &stcb->asoc;
+	chk->data = cookie;
+	chk->whoTo = net;
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+	return (0);
+}
+
+void
+sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
+    struct mbuf *m,
+    int offset,
+    int chk_length,
+    struct sctp_nets *net)
+{
+	/*
+	 * take a HB request and make it into a HB ack and send it.
+	 */
+	struct mbuf *outchain;
+	struct sctp_chunkhdr *chdr;
+	struct sctp_tmit_chunk *chk;
+
+
+	if (net == NULL)
+		/* must have a net pointer */
+		return;
+
+	outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
+	if (outchain == NULL) {
+		/* gak out of memory */
+		return;
+	}
+#ifdef SCTP_MBUF_LOGGING
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+		sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
+	}
+#endif
+	chdr = mtod(outchain, struct sctp_chunkhdr *);
+	chdr->chunk_type = SCTP_HEARTBEAT_ACK;
+	chdr->chunk_flags = 0;
+	if (chk_length % 4) {
+		/* need pad */
+		uint32_t cpthis = 0;
+		int padlen;
+
+		padlen = 4 - (chk_length % 4);
+		m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(outchain);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	chk->send_size = chk_length;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->asoc = &stcb->asoc;
+	chk->data = outchain;
+	chk->whoTo = net;
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_cookie_ack(struct sctp_tcb *stcb)
+{
+	/* formulate and queue a cookie-ack back to sender */
+	struct mbuf *cookie_ack;
+	struct sctp_chunkhdr *hdr;
+	struct sctp_tmit_chunk *chk;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
+	if (cookie_ack == NULL) {
+		/* no mbuf's */
+		return;
+	}
+	SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(cookie_ack);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	chk->send_size = sizeof(struct sctp_chunkhdr);
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->asoc = &stcb->asoc;
+	chk->data = cookie_ack;
+	if (chk->asoc->last_control_chunk_from != NULL) {
+		chk->whoTo = chk->asoc->last_control_chunk_from;
+		atomic_add_int(&chk->whoTo->ref_count, 1);
+	} else {
+		chk->whoTo = NULL;
+	}
+	hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
+	hdr->chunk_type = SCTP_COOKIE_ACK;
+	hdr->chunk_flags = 0;
+	hdr->chunk_length = htons(chk->send_size);
+	SCTP_BUF_LEN(cookie_ack) = chk->send_size;
+	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+	return;
+}
+
+
+void
+sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+	/* formulate and queue a SHUTDOWN-ACK back to the sender */
+	struct mbuf *m_shutdown_ack;
+	struct sctp_shutdown_ack_chunk *ack_cp;
+	struct sctp_tmit_chunk *chk;
+
+	m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
+	if (m_shutdown_ack == NULL) {
+		/* no mbuf's */
+		return;
+	}
+	SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(m_shutdown_ack);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	chk->send_size = sizeof(struct sctp_chunkhdr);
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->data = m_shutdown_ack;
+	chk->whoTo = net;
+	if (chk->whoTo) {
+		atomic_add_int(&chk->whoTo->ref_count, 1);
+	}
+	ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
+	ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
+	ack_cp->ch.chunk_flags = 0;
+	ack_cp->ch.chunk_length = htons(chk->send_size);
+	SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
+	TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+	return;
+}
+
+void
+sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
+{
+	/* formulate and queue a SHUTDOWN to the sender */
+	struct mbuf *m_shutdown;
+	struct sctp_shutdown_chunk *shutdown_cp;
+	struct sctp_tmit_chunk *chk;
+
+	TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
+		if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
+			/* We already have a SHUTDOWN queued. Reuse it. */
+			if (chk->whoTo) {
+				sctp_free_remote_addr(chk->whoTo);
+				chk->whoTo = NULL;
+			}
+			break;
+		}
+	}
+	if (chk == NULL) {
+		m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
+		if (m_shutdown == NULL) {
+			/* no mbuf's */
+			return;
+		}
+		SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
+		sctp_alloc_a_chunk(stcb, chk);
+		if (chk == NULL) {
+			/* no memory */
+			sctp_m_freem(m_shutdown);
+			return;
+		}
+		chk->copy_by_ref = 0;
+		chk->rec.chunk_id.id = SCTP_SHUTDOWN;
+		chk->rec.chunk_id.can_take_data = 1;
+		chk->flags = 0;
+		chk->send_size = sizeof(struct sctp_shutdown_chunk);
+		chk->sent = SCTP_DATAGRAM_UNSENT;
+		chk->snd_count = 0;
+		chk->flags = 0;
+		chk->asoc = &stcb->asoc;
+		chk->data = m_shutdown;
+		chk->whoTo = net;
+		if (chk->whoTo) {
+			atomic_add_int(&chk->whoTo->ref_count, 1);
+		}
+		shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
+		shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
+		shutdown_cp->ch.chunk_flags = 0;
+		shutdown_cp->ch.chunk_length = htons(chk->send_size);
+		shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
+		SCTP_BUF_LEN(m_shutdown) = chk->send_size;
+		TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+		chk->asoc->ctrl_queue_cnt++;
+	} else {
+		TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
+		chk->whoTo = net;
+		if (chk->whoTo) {
+			atomic_add_int(&chk->whoTo->ref_count, 1);
+		}
+		shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
+		shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
+		TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+	}
+	return;
+}
+
+void
+sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
+{
+	/*
+	 * formulate and queue an ASCONF to the peer.
+	 * ASCONF parameters should be queued on the assoc queue.
+	 */
+	struct sctp_tmit_chunk *chk;
+	struct mbuf *m_asconf;
+	int len;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
+	    (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
+		/* can't send a new one if there is one in flight already */
+		return;
+	}
+
+	/* compose an ASCONF chunk, maximum length is PMTU */
+	m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
+	if (m_asconf == NULL) {
+		return;
+	}
+
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		/* no memory */
+		sctp_m_freem(m_asconf);
+		return;
+	}
+
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_ASCONF;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
+	chk->data = m_asconf;
+	chk->send_size = len;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->asoc = &stcb->asoc;
+	chk->whoTo = net;
+	if (chk->whoTo) {
+		atomic_add_int(&chk->whoTo->ref_count, 1);
+	}
+	TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
+	chk->asoc->ctrl_queue_cnt++;
+	return;
+}
+
+void
+sctp_send_asconf_ack(struct sctp_tcb *stcb)
+{
+	/*
+	 * formulate and queue a asconf-ack back to sender.
+	 * the asconf-ack must be stored in the tcb.
+	 */
+	struct sctp_tmit_chunk *chk;
+	struct sctp_asconf_ack *ack, *latest_ack;
+	struct mbuf *m_ack;
+	struct sctp_nets *net = NULL;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	/* Get the latest ASCONF-ACK */
+	latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
+	if (latest_ack == NULL) {
+		return;
+	}
+	if (latest_ack->last_sent_to != NULL &&
+	    latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
+		/* we're doing a retransmission */
+		net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
+		if (net == NULL) {
+			/* no alternate */
+			if (stcb->asoc.last_control_chunk_from == NULL) {
+				if (stcb->asoc.alternate) {
+					net = stcb->asoc.alternate;
+				} else {
+					net = stcb->asoc.primary_destination;
+				}
+			} else {
+				net = stcb->asoc.last_control_chunk_from;
+			}
+		}
+	} else {
+		/* normal case */
+		if (stcb->asoc.last_control_chunk_from == NULL) {
+			if (stcb->asoc.alternate) {
+				net = stcb->asoc.alternate;
+			} else {
+				net = stcb->asoc.primary_destination;
+			}
+		} else {
+			net = stcb->asoc.last_control_chunk_from;
+		}
+	}
+	latest_ack->last_sent_to = net;
+
+	TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
+		if (ack->data == NULL) {
+			continue;
+		}
+
+		/* copy the asconf_ack */
+		m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
+		if (m_ack == NULL) {
+			/* couldn't copy it */
+			return;
+		}
+#ifdef SCTP_MBUF_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
+			sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
+		}
+#endif
+
+		sctp_alloc_a_chunk(stcb, chk);
+		if (chk == NULL) {
+			/* no memory */
+			if (m_ack)
+				sctp_m_freem(m_ack);
+			return;
+		}
+		chk->copy_by_ref = 0;
+		chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
+		chk->rec.chunk_id.can_take_data = 1;
+		chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
+		chk->whoTo = net;
+		if (chk->whoTo) {
+			atomic_add_int(&chk->whoTo->ref_count, 1);
+		}
+		chk->data = m_ack;
+		chk->send_size = ack->len;
+		chk->sent = SCTP_DATAGRAM_UNSENT;
+		chk->snd_count = 0;
+		chk->asoc = &stcb->asoc;
+
+		TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
+		chk->asoc->ctrl_queue_cnt++;
+	}
+	return;
+}
+
+
+static int
+sctp_chunk_retransmission(struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,
+    struct sctp_association *asoc,
+    int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+    SCTP_UNUSED
+#endif
+    )
+{
+	/*-
+	 * send out one MTU of retransmission. If fast_retransmit is
+	 * happening we ignore the cwnd. Otherwise we obey the cwnd and
+	 * rwnd. For a Cookie or Asconf in the control chunk queue we
+	 * retransmit them by themselves.
+	 *
+	 * For data chunks we will pick out the lowest TSN's in the sent_queue
+	 * marked for resend and bundle them all together (up to a MTU of
+	 * destination). The address to send to should have been
+	 * selected/changed where the retransmission was marked (i.e. in FR
+	 * or t3-timeout routines).
+	 */
+	struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
+	struct sctp_tmit_chunk *chk, *fwd;
+	struct mbuf *m, *endofchain;
+	struct sctp_nets *net = NULL;
+	uint32_t tsns_sent = 0;
+	int no_fragmentflg, bundle_at, cnt_thru;
+	unsigned int mtu;
+	int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
+	struct sctp_auth_chunk *auth = NULL;
+	uint32_t auth_offset = 0;
+	uint16_t auth_keyid;
+	int override_ok = 1;
+	int data_auth_reqd = 0;
+	uint32_t dmtu = 0;
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	tmr_started = ctl_cnt = bundle_at = error = 0;
+	no_fragmentflg = 1;
+	fwd_tsn = 0;
+	*cnt_out = 0;
+	fwd = NULL;
+	endofchain = m = NULL;
+	auth_keyid = stcb->asoc.authinfo.active_keyid;
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_audit_log(0xC3, 1);
+#endif
+	if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
+	    (TAILQ_EMPTY(&asoc->control_send_queue))) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT1,"SCTP hits empty queue with cnt set to %d?\n",
+			asoc->sent_queue_retran_cnt);
+		asoc->sent_queue_cnt = 0;
+		asoc->sent_queue_cnt_removeable = 0;
+		/* send back 0/0 so we enter normal transmission */
+		*cnt_out = 0;
+		return (0);
+	}
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
+		    (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
+		    (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
+			if (chk->sent != SCTP_DATAGRAM_RESEND) {
+				continue;
+			}
+			if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
+				if (chk != asoc->str_reset) {
+					/*
+					 * not eligible for retran if its
+					 * not ours
+					 */
+					continue;
+				}
+			}
+			ctl_cnt++;
+			if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
+				fwd_tsn = 1;
+			}
+			/*
+			 * Add an AUTH chunk, if chunk requires it save the
+			 * offset into the chain for AUTH
+			 */
+			if ((auth == NULL) &&
+			    (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
+							 stcb->asoc.peer_auth_chunks))) {
+				m = sctp_add_auth_chunk(m, &endofchain,
+							&auth, &auth_offset,
+							stcb,
+							chk->rec.chunk_id.id);
+				SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+			}
+			m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
+			break;
+		}
+	}
+	one_chunk = 0;
+	cnt_thru = 0;
+	/* do we have control chunks to retransmit? */
+	if (m != NULL) {
+		/* Start a timer no matter if we succeed or fail */
+		if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
+			sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
+		} else if (chk->rec.chunk_id.id == SCTP_ASCONF)
+			sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
+		chk->snd_count++;	/* update our count */
+		if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
+		                                        (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
+		                                        auth_offset, auth, stcb->asoc.authinfo.active_keyid,
+		                                        no_fragmentflg, 0, 0,
+		                                        inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
+		                                        chk->whoTo->port, NULL,
+#if defined(__FreeBSD__)
+		                                        0, 0,
+#endif
+		                                        so_locked))) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+			if (error == ENOBUFS) {
+				asoc->ifp_had_enobuf = 1;
+				SCTP_STAT_INCR(sctps_lowlevelerr);
+			}
+			return (error);
+		} else {
+			asoc->ifp_had_enobuf = 0;
+		}
+		endofchain = NULL;
+		auth = NULL;
+		auth_offset = 0;
+		/*
+		 * We don't want to mark the net->sent time here since this
+		 * we use this for HB and retrans cannot measure RTT
+		 */
+		/* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
+		*cnt_out += 1;
+		chk->sent = SCTP_DATAGRAM_SENT;
+		sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
+		if (fwd_tsn == 0) {
+			return (0);
+		} else {
+			/* Clean up the fwd-tsn list */
+			sctp_clean_up_ctl(stcb, asoc, so_locked);
+			return (0);
+		}
+	}
+	/*
+	 * Ok, it is just data retransmission we need to do or that and a
+	 * fwd-tsn with it all.
+	 */
+	if (TAILQ_EMPTY(&asoc->sent_queue)) {
+		return (SCTP_RETRAN_DONE);
+	}
+	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
+		/* not yet open, resend the cookie and that is it */
+		return (1);
+	}
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_auditing(20, inp, stcb, NULL);
+#endif
+	data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
+	TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
+		if (chk->sent != SCTP_DATAGRAM_RESEND) {
+			/* No, not sent to this net or not ready for rtx */
+			continue;
+		}
+		if (chk->data == NULL) {
+			SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
+			            chk->rec.data.tsn, chk->snd_count, chk->sent);
+			continue;
+		}
+		if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
+		    (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
+			struct mbuf *op_err;
+			char msg[SCTP_DIAG_INFO_LEN];
+
+			snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
+				 chk->rec.data.tsn, chk->snd_count);
+			op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+			                             msg);
+			atomic_add_int(&stcb->asoc.refcnt, 1);
+			sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
+			                          so_locked);
+			SCTP_TCB_LOCK(stcb);
+			atomic_subtract_int(&stcb->asoc.refcnt, 1);
+			return (SCTP_RETRAN_EXIT);
+		}
+		/* pick up the net */
+		net = chk->whoTo;
+		switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+			case AF_INET:
+				mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
+				break;
+#endif
+#ifdef INET6
+			case AF_INET6:
+				mtu = net->mtu - SCTP_MIN_OVERHEAD;
+				break;
+#endif
+#if defined(__Userspace__)
+			case AF_CONN:
+				mtu = net->mtu - sizeof(struct sctphdr);
+				break;
+#endif
+			default:
+				/* TSNH */
+				mtu = net->mtu;
+				break;
+		}
+
+		if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
+			/* No room in peers rwnd */
+			uint32_t tsn;
+
+			tsn = asoc->last_acked_seq + 1;
+			if (tsn == chk->rec.data.tsn) {
+				/*
+				 * we make a special exception for this
+				 * case. The peer has no rwnd but is missing
+				 * the lowest chunk.. which is probably what
+				 * is holding up the rwnd.
+				 */
+				goto one_chunk_around;
+			}
+			return (1);
+		}
+	one_chunk_around:
+		if (asoc->peers_rwnd < mtu) {
+			one_chunk = 1;
+			if ((asoc->peers_rwnd == 0) &&
+			    (asoc->total_flight == 0)) {
+				chk->window_probe = 1;
+				chk->whoTo->window_probe = 1;
+			}
+		}
+#ifdef SCTP_AUDITING_ENABLED
+		sctp_audit_log(0xC3, 2);
+#endif
+		bundle_at = 0;
+		m = NULL;
+		net->fast_retran_ip = 0;
+		if (chk->rec.data.doing_fast_retransmit == 0) {
+			/*
+			 * if no FR in progress skip destination that have
+			 * flight_size > cwnd.
+			 */
+			if (net->flight_size >= net->cwnd) {
+				continue;
+			}
+		} else {
+			/*
+			 * Mark the destination net to have FR recovery
+			 * limits put on it.
+			 */
+			*fr_done = 1;
+			net->fast_retran_ip = 1;
+		}
+
+		/*
+		 * if no AUTH is yet included and this chunk requires it,
+		 * make sure to account for it.  We don't apply the size
+		 * until the AUTH chunk is actually added below in case
+		 * there is no room for this chunk.
+		 */
+		if (data_auth_reqd && (auth == NULL)) {
+			dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+		} else
+			dmtu = 0;
+
+		if ((chk->send_size <= (mtu - dmtu)) ||
+		    (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
+			/* ok we will add this one */
+			if (data_auth_reqd) {
+				if (auth == NULL) {
+					m = sctp_add_auth_chunk(m,
+								&endofchain,
+								&auth,
+								&auth_offset,
+								stcb,
+								SCTP_DATA);
+					auth_keyid = chk->auth_keyid;
+					override_ok = 0;
+					SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+				} else if (override_ok) {
+					auth_keyid = chk->auth_keyid;
+					override_ok = 0;
+				} else if (chk->auth_keyid != auth_keyid) {
+					/* different keyid, so done bundling */
+					break;
+				}
+			}
+			m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
+			if (m == NULL) {
+				SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+				return (ENOMEM);
+			}
+			/* Do clear IP_DF ? */
+			if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+				no_fragmentflg = 0;
+			}
+			/* upate our MTU size */
+			if (mtu > (chk->send_size + dmtu))
+				mtu -= (chk->send_size + dmtu);
+			else
+				mtu = 0;
+			data_list[bundle_at++] = chk;
+			if (one_chunk && (asoc->total_flight <= 0)) {
+				SCTP_STAT_INCR(sctps_windowprobed);
+			}
+		}
+		if (one_chunk == 0) {
+			/*
+			 * now are there anymore forward from chk to pick
+			 * up?
+			 */
+			for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
+				if (fwd->sent != SCTP_DATAGRAM_RESEND) {
+					/* Nope, not for retran */
+					continue;
+				}
+				if (fwd->whoTo != net) {
+					/* Nope, not the net in question */
+					continue;
+				}
+				if (data_auth_reqd && (auth == NULL)) {
+					dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
+				} else
+					dmtu = 0;
+				if (fwd->send_size <= (mtu - dmtu)) {
+					if (data_auth_reqd) {
+						if (auth == NULL) {
+							m = sctp_add_auth_chunk(m,
+										&endofchain,
+										&auth,
+										&auth_offset,
+										stcb,
+										SCTP_DATA);
+							auth_keyid = fwd->auth_keyid;
+							override_ok = 0;
+							SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+						} else if (override_ok) {
+							auth_keyid = fwd->auth_keyid;
+							override_ok = 0;
+						} else if (fwd->auth_keyid != auth_keyid) {
+							/* different keyid, so done bundling */
+							break;
+						}
+					}
+					m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
+					if (m == NULL) {
+						SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+						return (ENOMEM);
+					}
+					/* Do clear IP_DF ? */
+					if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
+						no_fragmentflg = 0;
+					}
+					/* upate our MTU size */
+					if (mtu > (fwd->send_size + dmtu))
+						mtu -= (fwd->send_size + dmtu);
+					else
+						mtu = 0;
+					data_list[bundle_at++] = fwd;
+					if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
+						break;
+					}
+				} else {
+					/* can't fit so we are done */
+					break;
+				}
+			}
+		}
+		/* Is there something to send for this destination? */
+		if (m) {
+			/*
+			 * No matter if we fail/or succeed we should start a
+			 * timer. A failure is like a lost IP packet :-)
+			 */
+			if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+				/*
+				 * no timer running on this destination
+				 * restart it.
+				 */
+				sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+				tmr_started = 1;
+			}
+			/* Now lets send it, if there is anything to send :> */
+			if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
+			                                        (struct sockaddr *)&net->ro._l_addr, m,
+			                                        auth_offset, auth, auth_keyid,
+			                                        no_fragmentflg, 0, 0,
+			                                        inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
+			                                        net->port, NULL,
+#if defined(__FreeBSD__)
+			                                        0, 0,
+#endif
+			                                        so_locked))) {
+				/* error, we could not output */
+				SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+				if (error == ENOBUFS) {
+					asoc->ifp_had_enobuf = 1;
+					SCTP_STAT_INCR(sctps_lowlevelerr);
+				}
+				return (error);
+			} else {
+				asoc->ifp_had_enobuf = 0;
+			}
+			endofchain = NULL;
+			auth = NULL;
+			auth_offset = 0;
+			/* For HB's */
+			/*
+			 * We don't want to mark the net->sent time here
+			 * since this we use this for HB and retrans cannot
+			 * measure RTT
+			 */
+			/* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
+
+			/* For auto-close */
+			cnt_thru++;
+			if (*now_filled == 0) {
+				(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
+				*now = asoc->time_last_sent;
+				*now_filled = 1;
+			} else {
+				asoc->time_last_sent = *now;
+			}
+			*cnt_out += bundle_at;
+#ifdef SCTP_AUDITING_ENABLED
+			sctp_audit_log(0xC4, bundle_at);
+#endif
+			if (bundle_at) {
+				tsns_sent = data_list[0]->rec.data.tsn;
+			}
+			for (i = 0; i < bundle_at; i++) {
+				SCTP_STAT_INCR(sctps_sendretransdata);
+				data_list[i]->sent = SCTP_DATAGRAM_SENT;
+				/*
+				 * When we have a revoked data, and we
+				 * retransmit it, then we clear the revoked
+				 * flag since this flag dictates if we
+				 * subtracted from the fs
+				 */
+				if (data_list[i]->rec.data.chunk_was_revoked) {
+					/* Deflate the cwnd */
+					data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
+					data_list[i]->rec.data.chunk_was_revoked = 0;
+				}
+				data_list[i]->snd_count++;
+				sctp_ucount_decr(asoc->sent_queue_retran_cnt);
+				/* record the time */
+				data_list[i]->sent_rcv_time = asoc->time_last_sent;
+				if (data_list[i]->book_size_scale) {
+					/*
+					 * need to double the book size on
+					 * this one
+					 */
+					data_list[i]->book_size_scale = 0;
+					/* Since we double the booksize, we must
+					 * also double the output queue size, since this
+					 * get shrunk when we free by this amount.
+					 */
+					atomic_add_int(&((asoc)->total_output_queue_size),data_list[i]->book_size);
+					data_list[i]->book_size *= 2;
+
+
+				} else {
+					if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
+						sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
+						      asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
+					}
+					asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
+									    (uint32_t) (data_list[i]->send_size +
+											SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
+				}
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
+					sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
+						       data_list[i]->whoTo->flight_size,
+						       data_list[i]->book_size,
+						       (uint32_t)(uintptr_t)data_list[i]->whoTo,
+						       data_list[i]->rec.data.tsn);
+				}
+				sctp_flight_size_increase(data_list[i]);
+				sctp_total_flight_increase(stcb, data_list[i]);
+				if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
+					/* SWS sender side engages */
+					asoc->peers_rwnd = 0;
+				}
+				if ((i == 0) &&
+				    (data_list[i]->rec.data.doing_fast_retransmit)) {
+					SCTP_STAT_INCR(sctps_sendfastretrans);
+					if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
+					    (tmr_started == 0)) {
+						/*-
+						 * ok we just fast-retrans'd
+						 * the lowest TSN, i.e the
+						 * first on the list. In
+						 * this case we want to give
+						 * some more time to get a
+						 * SACK back without a
+						 * t3-expiring.
+						 */
+						sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
+								SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
+						sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
+					}
+				}
+			}
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+				sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
+			}
+#ifdef SCTP_AUDITING_ENABLED
+			sctp_auditing(21, inp, stcb, NULL);
+#endif
+		} else {
+			/* None will fit */
+			return (1);
+		}
+		if (asoc->sent_queue_retran_cnt <= 0) {
+			/* all done we have no more to retran */
+			asoc->sent_queue_retran_cnt = 0;
+			break;
+		}
+		if (one_chunk) {
+			/* No more room in rwnd */
+			return (1);
+		}
+		/* stop the for loop here. we sent out a packet */
+		break;
+	}
+	return (0);
+}
+
+static void
+sctp_timer_validation(struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,
+    struct sctp_association *asoc)
+{
+	struct sctp_nets *net;
+
+	/* Validate that a timer is running somewhere */
+	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+		if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
+			/* Here is a timer */
+			return;
+		}
+	}
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	/* Gak, we did not have a timer somewhere */
+	SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
+	if (asoc->alternate) {
+		sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
+	} else {
+		sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
+	}
+	return;
+}
+
+void
+sctp_chunk_output (struct sctp_inpcb *inp,
+    struct sctp_tcb *stcb,
+    int from_where,
+    int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+    SCTP_UNUSED
+#endif
+    )
+{
+	/*-
+	 * Ok this is the generic chunk service queue. we must do the
+	 * following:
+	 * - See if there are retransmits pending, if so we must
+	 *   do these first.
+	 * - Service the stream queue that is next, moving any
+	 *   message (note I must get a complete message i.e.
+	 *   FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
+	 *   TSN's
+	 * - Check to see if the cwnd/rwnd allows any output, if so we
+	 *   go ahead and fomulate and send the low level chunks. Making sure
+	 *   to combine any control in the control chunk queue also.
+	 */
+	struct sctp_association *asoc;
+	struct sctp_nets *net;
+	int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
+	unsigned int burst_cnt = 0;
+	struct timeval now;
+	int now_filled = 0;
+	int nagle_on;
+	int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+	int un_sent = 0;
+	int fr_done;
+	unsigned int tot_frs = 0;
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(inp));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(inp));
+	}
+#endif
+	asoc = &stcb->asoc;
+do_it_again:
+	/* The Nagle algorithm is only applied when handling a send call. */
+	if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
+		if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
+			nagle_on = 0;
+		} else {
+			nagle_on = 1;
+		}
+	} else {
+		nagle_on = 0;
+	}
+	SCTP_TCB_LOCK_ASSERT(stcb);
+
+	un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
+
+	if ((un_sent <= 0) &&
+	    (TAILQ_EMPTY(&asoc->control_send_queue)) &&
+	    (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
+	    (asoc->sent_queue_retran_cnt == 0) &&
+	    (asoc->trigger_reset == 0)) {
+		/* Nothing to do unless there is something to be sent left */
+		return;
+	}
+	/* Do we have something to send, data or control AND
+	 * a sack timer running, if so piggy-back the sack.
+	 */
+	if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
+		sctp_send_sack(stcb, so_locked);
+		(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
+	}
+	while (asoc->sent_queue_retran_cnt) {
+		/*-
+		 * Ok, it is retransmission time only, we send out only ONE
+		 * packet with a single call off to the retran code.
+		 */
+		if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
+			/*-
+			 * Special hook for handling cookiess discarded
+			 * by peer that carried data. Send cookie-ack only
+			 * and then the next call with get the retran's.
+			 */
+			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
+						    from_where,
+						    &now, &now_filled, frag_point, so_locked);
+			return;
+		} else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
+			/* if its not from a HB then do it */
+			fr_done = 0;
+			ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
+			if (fr_done) {
+				tot_frs++;
+			}
+		} else {
+			/*
+			 * its from any other place, we don't allow retran
+			 * output (only control)
+			 */
+			ret = 1;
+		}
+		if (ret > 0) {
+			/* Can't send anymore */
+			/*-
+			 * now lets push out control by calling med-level
+			 * output once. this assures that we WILL send HB's
+			 * if queued too.
+			 */
+			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
+						    from_where,
+						    &now, &now_filled, frag_point, so_locked);
+#ifdef SCTP_AUDITING_ENABLED
+			sctp_auditing(8, inp, stcb, NULL);
+#endif
+			sctp_timer_validation(inp, stcb, asoc);
+			return;
+		}
+		if (ret < 0) {
+			/*-
+			 * The count was off.. retran is not happening so do
+			 * the normal retransmission.
+			 */
+#ifdef SCTP_AUDITING_ENABLED
+			sctp_auditing(9, inp, stcb, NULL);
+#endif
+			if (ret == SCTP_RETRAN_EXIT) {
+				return;
+			}
+			break;
+		}
+		if (from_where == SCTP_OUTPUT_FROM_T3) {
+			/* Only one transmission allowed out of a timeout */
+#ifdef SCTP_AUDITING_ENABLED
+			sctp_auditing(10, inp, stcb, NULL);
+#endif
+			/* Push out any control */
+			(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
+						    &now, &now_filled, frag_point, so_locked);
+			return;
+		}
+		if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
+			/* Hit FR burst limit */
+			return;
+		}
+		if ((num_out == 0) && (ret == 0)) {
+			/* No more retrans to send */
+			break;
+		}
+	}
+#ifdef SCTP_AUDITING_ENABLED
+	sctp_auditing(12, inp, stcb, NULL);
+#endif
+	/* Check for bad destinations, if they exist move chunks around. */
+	TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
+		if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
+			/*-
+			 * if possible move things off of this address we
+			 * still may send below due to the dormant state but
+			 * we try to find an alternate address to send to
+			 * and if we have one we move all queued data on the
+			 * out wheel to this alternate address.
+			 */
+			if (net->ref_count > 1)
+				sctp_move_chunks_from_net(stcb, net);
+		} else {
+			/*-
+			 * if ((asoc->sat_network) || (net->addr_is_local))
+			 * { burst_limit = asoc->max_burst *
+			 * SCTP_SAT_NETWORK_BURST_INCR; }
+			 */
+			if (asoc->max_burst > 0) {
+				if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
+					if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
+						/* JRS - Use the congestion control given in the congestion control module */
+						asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
+						if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+							sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
+						}
+						SCTP_STAT_INCR(sctps_maxburstqueued);
+					}
+					net->fast_retran_ip = 0;
+				} else {
+					if (net->flight_size == 0) {
+						/* Should be decaying the cwnd here */
+						;
+					}
+				}
+			}
+		}
+
+	}
+	burst_cnt = 0;
+	do {
+		error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
+					      &reason_code, 0, from_where,
+					      &now, &now_filled, frag_point, so_locked);
+		if (error) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+				sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
+			}
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+				sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
+				sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
+			}
+			break;
+		}
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
+
+		tot_out += num_out;
+		burst_cnt++;
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+			sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
+			if (num_out == 0) {
+				sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
+			}
+		}
+		if (nagle_on) {
+			/*
+			 * When the Nagle algorithm is used, look at how much
+			 * is unsent, then if its smaller than an MTU and we
+			 * have data in flight we stop, except if we are
+			 * handling a fragmented user message.
+			 */
+			un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+			           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+			if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
+			    (stcb->asoc.total_flight > 0)) { 
+/*	&&		     sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
+				break;
+			}
+		}
+		if (TAILQ_EMPTY(&asoc->control_send_queue) &&
+		    TAILQ_EMPTY(&asoc->send_queue) &&
+		    sctp_is_there_unsent_data(stcb, so_locked) == 0) {
+			/* Nothing left to send */
+			break;
+		}
+		if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
+			/* Nothing left to send */
+			break;
+		}
+	} while (num_out &&
+	         ((asoc->max_burst == 0) ||
+		  SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
+		  (burst_cnt < asoc->max_burst)));
+
+	if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
+		if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
+			SCTP_STAT_INCR(sctps_maxburstqueued);
+			asoc->burst_limit_applied = 1;
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
+				sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
+			}
+		} else {
+			asoc->burst_limit_applied = 0;
+		}
+	}
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
+		sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
+		tot_out);
+
+	/*-
+	 * Now we need to clean up the control chunk chain if a ECNE is on
+	 * it. It must be marked as UNSENT again so next call will continue
+	 * to send it until such time that we get a CWR, to remove it.
+	 */
+	if (stcb->asoc.ecn_echo_cnt_onq)
+		sctp_fix_ecn_echo(asoc);
+
+	if (stcb->asoc.trigger_reset) {
+		if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0)  {
+			goto do_it_again;
+		}
+	}
+	return;
+}
+
+
+int
+sctp_output(
+	struct sctp_inpcb *inp,
+#if defined(__Panda__)
+	pakhandle_type m,
+#else
+	struct mbuf *m,
+#endif
+	struct sockaddr *addr,
+#if defined(__Panda__)
+	pakhandle_type control,
+#else
+	struct mbuf *control,
+#endif
+#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
+	struct thread *p,
+#elif defined(__Windows__)
+	PKTHREAD p,
+#else
+#if defined(__APPLE__)
+	struct proc *p SCTP_UNUSED,
+#else
+	struct proc *p,
+#endif
+#endif
+	int flags)
+{
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		return (EINVAL);
+	}
+
+	if (inp->sctp_socket == NULL) {
+		SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		return (EINVAL);
+	}
+	return (sctp_sosend(inp->sctp_socket,
+			    addr,
+			    (struct uio *)NULL,
+			    m,
+			    control,
+#if defined(__APPLE__) || defined(__Panda__)
+			    flags
+#else
+			    flags, p
+#endif
+			));
+}
+
+void
+send_forward_tsn(struct sctp_tcb *stcb,
+		 struct sctp_association *asoc)
+{
+	struct sctp_tmit_chunk *chk, *at, *tp1, *last;
+	struct sctp_forward_tsn_chunk *fwdtsn;
+	struct sctp_strseq *strseq;
+	struct sctp_strseq_mid *strseq_m;
+	uint32_t advance_peer_ack_point;
+	unsigned int cnt_of_space, i, ovh;
+	unsigned int space_needed;
+	unsigned int cnt_of_skipped = 0;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
+			/* mark it to unsent */
+			chk->sent = SCTP_DATAGRAM_UNSENT;
+			chk->snd_count = 0;
+			/* Do we correct its output location? */
+			if (chk->whoTo) {
+				sctp_free_remote_addr(chk->whoTo);
+				chk->whoTo = NULL;
+			}
+			goto sctp_fill_in_rest;
+		}
+	}
+	/* Ok if we reach here we must build one */
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		return;
+	}
+	asoc->fwd_tsn_cnt++;
+	chk->copy_by_ref = 0;
+	/* 
+	 * We don't do the old thing here since
+	 * this is used not for on-wire but to
+	 * tell if we are sending a fwd-tsn by
+	 * the stack during output. And if its
+	 * a IFORWARD or a FORWARD it is a fwd-tsn.
+	 */
+	chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = asoc;
+	chk->whoTo = NULL;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
+	asoc->ctrl_queue_cnt++;
+sctp_fill_in_rest:
+	/*-
+	 * Here we go through and fill out the part that deals with
+	 * stream/seq of the ones we skip.
+	 */
+	SCTP_BUF_LEN(chk->data) = 0;
+	TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
+		if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
+		    (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
+			/* no more to look at */
+			break;
+		}
+		if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
+			/* We don't report these */
+			continue;
+		}
+		cnt_of_skipped++;
+	}
+	if (asoc->idata_supported) {
+		space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
+		                (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
+	} else {
+		space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
+		                (cnt_of_skipped * sizeof(struct sctp_strseq)));
+	}
+	cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
+
+	if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
+		ovh = SCTP_MIN_OVERHEAD;
+	} else {
+		ovh = SCTP_MIN_V4_OVERHEAD;
+	}
+	if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
+		/* trim to a mtu size */
+		cnt_of_space = asoc->smallest_mtu - ovh;
+	}
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+		sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+			       0xff, 0, cnt_of_skipped,
+			       asoc->advanced_peer_ack_point);
+	}
+	advance_peer_ack_point = asoc->advanced_peer_ack_point;
+	if (cnt_of_space < space_needed) {
+		/*-
+		 * ok we must trim down the chunk by lowering the
+		 * advance peer ack point.
+		 */
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+			sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+				       0xff, 0xff, cnt_of_space,
+				       space_needed);
+		}
+		cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
+		if (asoc->idata_supported) {
+			cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
+		} else {
+			cnt_of_skipped /= sizeof(struct sctp_strseq);
+		}
+		/*-
+		 * Go through and find the TSN that will be the one
+		 * we report.
+		 */
+		at = TAILQ_FIRST(&asoc->sent_queue);
+		if (at != NULL) {
+			for (i = 0; i < cnt_of_skipped; i++) {
+				tp1 = TAILQ_NEXT(at, sctp_next);
+				if (tp1 == NULL) {
+					break;
+				}
+				at = tp1;
+			}
+		}
+		if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
+			sctp_misc_ints(SCTP_FWD_TSN_CHECK,
+				       0xff, cnt_of_skipped, at->rec.data.tsn,
+				       asoc->advanced_peer_ack_point);
+		}
+		last = at;
+		/*-
+		 * last now points to last one I can report, update
+		 * peer ack point
+		 */
+		if (last) {
+			advance_peer_ack_point = last->rec.data.tsn;
+		}
+		if (asoc->idata_supported) {
+			space_needed = sizeof(struct sctp_forward_tsn_chunk) +
+			               cnt_of_skipped * sizeof(struct sctp_strseq_mid);
+		} else {
+			space_needed = sizeof(struct sctp_forward_tsn_chunk) +
+			               cnt_of_skipped * sizeof(struct sctp_strseq);
+		}
+	}
+	chk->send_size = space_needed;
+	/* Setup the chunk */
+	fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
+	fwdtsn->ch.chunk_length = htons(chk->send_size);
+	fwdtsn->ch.chunk_flags = 0;
+	if (asoc->idata_supported) {
+		fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
+	} else {
+		fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
+	}
+	fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	fwdtsn++;
+	/*-
+	 * Move pointer to after the fwdtsn and transfer to the
+	 * strseq pointer.
+	 */
+	if (asoc->idata_supported) {
+		strseq_m = (struct sctp_strseq_mid *)fwdtsn;
+		strseq = NULL;
+	} else {
+		strseq = (struct sctp_strseq *)fwdtsn;
+		strseq_m = NULL;
+	}
+	/*-
+	 * Now populate the strseq list. This is done blindly
+	 * without pulling out duplicate stream info. This is
+	 * inefficent but won't harm the process since the peer will
+	 * look at these in sequence and will thus release anything.
+	 * It could mean we exceed the PMTU and chop off some that
+	 * we could have included.. but this is unlikely (aka 1432/4
+	 * would mean 300+ stream seq's would have to be reported in
+	 * one FWD-TSN. With a bit of work we can later FIX this to
+	 * optimize and pull out duplicates.. but it does add more
+	 * overhead. So for now... not!
+	 */
+	i = 0;
+	TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
+		if (i >= cnt_of_skipped) {
+			break;
+		}
+		if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
+			/* We don't report these */
+			continue;
+		}
+		if (at->rec.data.tsn == advance_peer_ack_point) {
+			at->rec.data.fwd_tsn_cnt = 0;
+		}
+		if (asoc->idata_supported) {
+			strseq_m->sid = htons(at->rec.data.sid);
+			if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
+				strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
+			} else {
+				strseq_m->flags = 0;
+			}
+			strseq_m->mid = htonl(at->rec.data.mid);
+			strseq_m++;
+		} else {
+			strseq->sid = htons(at->rec.data.sid);
+			strseq->ssn = htons((uint16_t)at->rec.data.mid);
+			strseq++;
+		}
+		i++;
+	}
+	return;
+}
+
+void
+sctp_send_sack(struct sctp_tcb *stcb, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+	SCTP_UNUSED
+#endif
+)
+{
+	/*-
+	 * Queue up a SACK or NR-SACK in the control queue.
+	 * We must first check to see if a SACK or NR-SACK is
+	 * somehow on the control queue.
+	 * If so, we will take and and remove the old one.
+	 */
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk, *a_chk;
+	struct sctp_sack_chunk *sack;
+	struct sctp_nr_sack_chunk *nr_sack;
+	struct sctp_gap_ack_block *gap_descriptor;
+	const struct sack_track *selector;
+	int mergeable = 0;
+	int offset;
+	caddr_t limit;
+	uint32_t *dup;
+	int limit_reached = 0;
+	unsigned int i, siz, j;
+	unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
+	int num_dups = 0;
+	int space_req;
+	uint32_t highest_tsn;
+	uint8_t flags;
+	uint8_t type;
+	uint8_t tsn_map;
+
+	if (stcb->asoc.nrsack_supported == 1) {
+		type = SCTP_NR_SELECTIVE_ACK;
+	} else {
+		type = SCTP_SELECTIVE_ACK;
+	}
+	a_chk = NULL;
+	asoc = &stcb->asoc;
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (asoc->last_data_chunk_from == NULL) {
+		/* Hmm we never received anything */
+		return;
+	}
+	sctp_slide_mapping_arrays(stcb);
+	sctp_set_rwnd(stcb, asoc);
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if (chk->rec.chunk_id.id == type) {
+			/* Hmm, found a sack already on queue, remove it */
+			TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
+			asoc->ctrl_queue_cnt--;
+			a_chk = chk;
+			if (a_chk->data) {
+				sctp_m_freem(a_chk->data);
+				a_chk->data = NULL;
+			}
+			if (a_chk->whoTo) {
+				sctp_free_remote_addr(a_chk->whoTo);
+				a_chk->whoTo = NULL;
+			}
+			break;
+		}
+	}
+	if (a_chk == NULL) {
+		sctp_alloc_a_chunk(stcb, a_chk);
+		if (a_chk == NULL) {
+			/* No memory so we drop the idea, and set a timer */
+			if (stcb->asoc.delayed_ack) {
+				sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+				                stcb->sctp_ep, stcb, NULL,
+				                SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
+				sctp_timer_start(SCTP_TIMER_TYPE_RECV,
+				    stcb->sctp_ep, stcb, NULL);
+			} else {
+				stcb->asoc.send_sack = 1;
+			}
+			return;
+		}
+		a_chk->copy_by_ref = 0;
+		a_chk->rec.chunk_id.id = type;
+		a_chk->rec.chunk_id.can_take_data = 1;
+	}
+	/* Clear our pkt counts */
+	asoc->data_pkts_seen = 0;
+
+	a_chk->flags = 0;
+	a_chk->asoc = asoc;
+	a_chk->snd_count = 0;
+	a_chk->send_size = 0;	/* fill in later */
+	a_chk->sent = SCTP_DATAGRAM_UNSENT;
+	a_chk->whoTo = NULL;
+
+	if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
+		/*-
+		 * Ok, the destination for the SACK is unreachable, lets see if
+		 * we can select an alternate to asoc->last_data_chunk_from
+		 */
+		a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
+		if (a_chk->whoTo == NULL) {
+			/* Nope, no alternate */
+			a_chk->whoTo = asoc->last_data_chunk_from;
+		}
+	} else {
+		a_chk->whoTo = asoc->last_data_chunk_from;
+	}
+	if (a_chk->whoTo) {
+		atomic_add_int(&a_chk->whoTo->ref_count, 1);
+	}
+	if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
+		highest_tsn = asoc->highest_tsn_inside_map;
+	} else {
+		highest_tsn = asoc->highest_tsn_inside_nr_map;
+	}
+	if (highest_tsn == asoc->cumulative_tsn) {
+		/* no gaps */
+		if (type == SCTP_SELECTIVE_ACK) {
+			space_req = sizeof(struct sctp_sack_chunk);
+		} else {
+			space_req = sizeof(struct sctp_nr_sack_chunk);
+		}
+	} else {
+		/* gaps get a cluster */
+		space_req = MCLBYTES;
+	}
+	/* Ok now lets formulate a MBUF with our sack */
+	a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
+	if ((a_chk->data == NULL) ||
+	    (a_chk->whoTo == NULL)) {
+		/* rats, no mbuf memory */
+		if (a_chk->data) {
+			/* was a problem with the destination */
+			sctp_m_freem(a_chk->data);
+			a_chk->data = NULL;
+		}
+		sctp_free_a_chunk(stcb, a_chk, so_locked);
+		/* sa_ignore NO_NULL_CHK */
+		if (stcb->asoc.delayed_ack) {
+			sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
+			                stcb->sctp_ep, stcb, NULL,
+			                SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
+			sctp_timer_start(SCTP_TIMER_TYPE_RECV,
+			    stcb->sctp_ep, stcb, NULL);
+		} else {
+			stcb->asoc.send_sack = 1;
+		}
+		return;
+	}
+	/* ok, lets go through and fill it in */
+	SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
+	space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
+	if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
+		space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
+	}
+	limit = mtod(a_chk->data, caddr_t);
+	limit += space;
+
+	flags = 0;
+
+	if ((asoc->sctp_cmt_on_off > 0) &&
+	    SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
+		/*-
+		 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
+		 * received, then set high bit to 1, else 0. Reset
+		 * pkts_rcvd.
+		 */
+		flags |= (asoc->cmt_dac_pkts_rcvd << 6);
+		asoc->cmt_dac_pkts_rcvd = 0;
+	}
+#ifdef SCTP_ASOCLOG_OF_TSNS
+	stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
+	stcb->asoc.cumack_log_atsnt++;
+	if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
+		stcb->asoc.cumack_log_atsnt = 0;
+	}
+#endif
+	/* reset the readers interpretation */
+	stcb->freed_by_sorcv_sincelast = 0;
+
+	if (type == SCTP_SELECTIVE_ACK) {
+		sack = mtod(a_chk->data, struct sctp_sack_chunk *);
+		nr_sack = NULL;
+		gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
+		if (highest_tsn > asoc->mapping_array_base_tsn) {
+			siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+		} else {
+			siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
+		}
+	} else {
+		sack = NULL;
+		nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
+		gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
+		if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
+			siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+		} else {
+			siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
+		}
+	}
+
+	if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
+		offset = 1;
+	} else {
+		offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
+	}
+	if (((type == SCTP_SELECTIVE_ACK) &&
+	     SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
+	    ((type == SCTP_NR_SELECTIVE_ACK) &&
+	     SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
+		/* we have a gap .. maybe */
+		for (i = 0; i < siz; i++) {
+			tsn_map = asoc->mapping_array[i];
+			if (type == SCTP_SELECTIVE_ACK) {
+				tsn_map |= asoc->nr_mapping_array[i];
+			}
+			if (i == 0) {
+				/*
+				 * Clear all bits corresponding to TSNs
+				 * smaller or equal to the cumulative TSN.
+				 */
+				tsn_map &= (~0U << (1 - offset));
+			}
+			selector = &sack_array[tsn_map];
+			if (mergeable && selector->right_edge) {
+				/*
+				 * Backup, left and right edges were ok to
+				 * merge.
+				 */
+				num_gap_blocks--;
+				gap_descriptor--;
+			}
+			if (selector->num_entries == 0)
+				mergeable = 0;
+			else {
+				for (j = 0; j < selector->num_entries; j++) {
+					if (mergeable && selector->right_edge) {
+						/*
+						 * do a merge by NOT setting
+						 * the left side
+						 */
+						mergeable = 0;
+					} else {
+						/*
+						 * no merge, set the left
+						 * side
+						 */
+						mergeable = 0;
+						gap_descriptor->start = htons((selector->gaps[j].start + offset));
+					}
+					gap_descriptor->end = htons((selector->gaps[j].end + offset));
+					num_gap_blocks++;
+					gap_descriptor++;
+					if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
+						/* no more room */
+						limit_reached = 1;
+						break;
+					}
+				}
+				if (selector->left_edge) {
+					mergeable = 1;
+				}
+			}
+			if (limit_reached) {
+				/* Reached the limit stop */
+				break;
+			}
+			offset += 8;
+		}
+	}
+	if ((type == SCTP_NR_SELECTIVE_ACK) &&
+	    (limit_reached == 0)) {
+
+		mergeable = 0;
+
+		if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
+			siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
+		} else {
+			siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
+		}
+
+		if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
+			offset = 1;
+		} else {
+			offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
+		}
+		if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
+			/* we have a gap .. maybe */
+			for (i = 0; i < siz; i++) {
+				tsn_map = asoc->nr_mapping_array[i];
+				if (i == 0) {
+					/*
+					 * Clear all bits corresponding to TSNs
+					 * smaller or equal to the cumulative TSN.
+					 */
+					tsn_map &= (~0U << (1 - offset));
+				}
+				selector = &sack_array[tsn_map];
+				if (mergeable && selector->right_edge) {
+					/*
+					* Backup, left and right edges were ok to
+					* merge.
+					*/
+					num_nr_gap_blocks--;
+					gap_descriptor--;
+				}
+				if (selector->num_entries == 0)
+					mergeable = 0;
+				else {
+					for (j = 0; j < selector->num_entries; j++) {
+						if (mergeable && selector->right_edge) {
+							/*
+							* do a merge by NOT setting
+							* the left side
+							*/
+							mergeable = 0;
+						} else {
+							/*
+							* no merge, set the left
+							* side
+							*/
+							mergeable = 0;
+							gap_descriptor->start = htons((selector->gaps[j].start + offset));
+						}
+						gap_descriptor->end = htons((selector->gaps[j].end + offset));
+						num_nr_gap_blocks++;
+						gap_descriptor++;
+						if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
+							/* no more room */
+							limit_reached = 1;
+							break;
+						}
+					}
+					if (selector->left_edge) {
+						mergeable = 1;
+					}
+				}
+				if (limit_reached) {
+					/* Reached the limit stop */
+					break;
+				}
+				offset += 8;
+			}
+		}
+	}
+	/* now we must add any dups we are going to report. */
+	if ((limit_reached == 0) && (asoc->numduptsns)) {
+		dup = (uint32_t *) gap_descriptor;
+		for (i = 0; i < asoc->numduptsns; i++) {
+			*dup = htonl(asoc->dup_tsns[i]);
+			dup++;
+			num_dups++;
+			if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
+				/* no more room */
+				break;
+			}
+		}
+		asoc->numduptsns = 0;
+	}
+	/*
+	 * now that the chunk is prepared queue it to the control chunk
+	 * queue.
+	 */
+	if (type == SCTP_SELECTIVE_ACK) {
+		a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
+		                              (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
+		                              num_dups * sizeof(int32_t));
+		SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
+		sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
+		sack->sack.a_rwnd = htonl(asoc->my_rwnd);
+		sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
+		sack->sack.num_dup_tsns = htons(num_dups);
+		sack->ch.chunk_type = type;
+		sack->ch.chunk_flags = flags;
+		sack->ch.chunk_length = htons(a_chk->send_size);
+	} else {
+		a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
+		                              (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
+		                              num_dups * sizeof(int32_t));
+		SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
+		nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
+		nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
+		nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
+		nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
+		nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
+		nr_sack->nr_sack.reserved = 0;
+		nr_sack->ch.chunk_type = type;
+		nr_sack->ch.chunk_flags = flags;
+		nr_sack->ch.chunk_length = htons(a_chk->send_size);
+	}
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
+	asoc->my_last_reported_rwnd = asoc->my_rwnd;
+	asoc->ctrl_queue_cnt++;
+	asoc->send_sack = 0;
+	SCTP_STAT_INCR(sctps_sendsacks);
+	return;
+}
+
+void
+sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+    SCTP_UNUSED
+#endif
+    )
+{
+	struct mbuf *m_abort, *m, *m_last;
+	struct mbuf *m_out, *m_end = NULL;
+	struct sctp_abort_chunk *abort;
+	struct sctp_auth_chunk *auth = NULL;
+	struct sctp_nets *net;
+	uint32_t vtag;
+	uint32_t auth_offset = 0;
+	int error;
+	uint16_t cause_len, chunk_len, padding_len;
+
+#if defined(__APPLE__)
+	if (so_locked) {
+		sctp_lock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	} else {
+		sctp_unlock_assert(SCTP_INP_SO(stcb->sctp_ep));
+	}
+#endif
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	/*-
+	 * Add an AUTH chunk, if chunk requires it and save the offset into
+	 * the chain for AUTH
+	 */
+	if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
+	                                stcb->asoc.peer_auth_chunks)) {
+		m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
+					    stcb, SCTP_ABORT_ASSOCIATION);
+		SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+	} else {
+		m_out = NULL;
+	}
+	m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
+	if (m_abort == NULL) {
+		if (m_out) {
+			sctp_m_freem(m_out);
+		}
+		if (operr) {
+			sctp_m_freem(operr);
+		}
+		return;
+	}
+	/* link in any error */
+	SCTP_BUF_NEXT(m_abort) = operr;
+	cause_len = 0;
+	m_last = NULL;
+	for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
+		cause_len += (uint16_t)SCTP_BUF_LEN(m);
+		if (SCTP_BUF_NEXT(m) == NULL) {
+			m_last = m;
+		}
+	}
+	SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
+	chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
+	padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
+	if (m_out == NULL) {
+		/* NO Auth chunk prepended, so reserve space in front */
+		SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
+		m_out = m_abort;
+	} else {
+		/* Put AUTH chunk at the front of the chain */
+		SCTP_BUF_NEXT(m_end) = m_abort;
+	}
+	if (stcb->asoc.alternate) {
+		net = stcb->asoc.alternate;
+	} else {
+		net = stcb->asoc.primary_destination;
+	}
+	/* Fill in the ABORT chunk header. */
+	abort = mtod(m_abort, struct sctp_abort_chunk *);
+	abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
+	if (stcb->asoc.peer_vtag == 0) {
+		/* This happens iff the assoc is in COOKIE-WAIT state. */
+		vtag = stcb->asoc.my_vtag;
+		abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
+	} else {
+		vtag = stcb->asoc.peer_vtag;
+		abort->ch.chunk_flags = 0;
+	}
+	abort->ch.chunk_length = htons(chunk_len);
+	/* Add padding, if necessary. */
+	if (padding_len > 0) {
+		if ((m_last == NULL) ||
+		    (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
+			sctp_m_freem(m_out);
+			return;
+		}
+	}
+	if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
+	                                        (struct sockaddr *)&net->ro._l_addr,
+	                                        m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
+	                                        stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
+	                                        stcb->asoc.primary_destination->port, NULL,
+#if defined(__FreeBSD__)
+	                                        0, 0,
+#endif
+	                                        so_locked))) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+		if (error == ENOBUFS) {
+			stcb->asoc.ifp_had_enobuf = 1;
+			SCTP_STAT_INCR(sctps_lowlevelerr);
+		}
+	} else {
+		stcb->asoc.ifp_had_enobuf = 0;
+	}
+	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+}
+
+void
+sctp_send_shutdown_complete(struct sctp_tcb *stcb,
+                            struct sctp_nets *net,
+                            int reflect_vtag)
+{
+	/* formulate and SEND a SHUTDOWN-COMPLETE */
+	struct mbuf *m_shutdown_comp;
+	struct sctp_shutdown_complete_chunk *shutdown_complete;
+	uint32_t vtag;
+	int error;
+	uint8_t flags;
+
+	m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
+	if (m_shutdown_comp == NULL) {
+		/* no mbuf's */
+		return;
+	}
+	if (reflect_vtag) {
+		flags = SCTP_HAD_NO_TCB;
+		vtag = stcb->asoc.my_vtag;
+	} else {
+		flags = 0;
+		vtag = stcb->asoc.peer_vtag;
+	}
+	shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
+	shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
+	shutdown_complete->ch.chunk_flags = flags;
+	shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
+	SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
+	if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
+	                                        (struct sockaddr *)&net->ro._l_addr,
+	                                        m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
+	                                        stcb->sctp_ep->sctp_lport, stcb->rport,
+	                                        htonl(vtag),
+	                                        net->port, NULL,
+#if defined(__FreeBSD__)
+	                                        0, 0,
+#endif
+	                                        SCTP_SO_NOT_LOCKED))) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
+		if (error == ENOBUFS) {
+			stcb->asoc.ifp_had_enobuf = 1;
+			SCTP_STAT_INCR(sctps_lowlevelerr);
+		}
+	} else {
+		stcb->asoc.ifp_had_enobuf = 0;
+	}
+	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+	return;
+}
+
+#if defined(__FreeBSD__)
+static void
+sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
+                   struct sctphdr *sh, uint32_t vtag,
+                   uint8_t type, struct mbuf *cause,
+                   uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
+                   uint32_t vrf_id, uint16_t port)
+#else
+static void
+sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
+                   struct sctphdr *sh, uint32_t vtag,
+                   uint8_t type, struct mbuf *cause,
+                   uint32_t vrf_id SCTP_UNUSED, uint16_t port)
+#endif
+{
+#ifdef __Panda__
+	pakhandle_type o_pak;
+#else
+	struct mbuf *o_pak;
+#endif
+	struct mbuf *mout;
+	struct sctphdr *shout;
+	struct sctp_chunkhdr *ch;
+#if defined(INET) || defined(INET6)
+	struct udphdr *udp;
+	int ret;
+#endif
+	int len, cause_len, padding_len;
+#ifdef INET
+#if defined(__APPLE__) || defined(__Panda__)
+	sctp_route_t ro;
+#endif
+	struct sockaddr_in *src_sin, *dst_sin;
+	struct ip *ip;
+#endif
+#ifdef INET6
+	struct sockaddr_in6 *src_sin6, *dst_sin6;
+	struct ip6_hdr *ip6;
+#endif
+
+	/* Compute the length of the cause and add final padding. */
+	cause_len = 0;
+	if (cause != NULL) {
+		struct mbuf *m_at, *m_last = NULL;
+
+		for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
+			if (SCTP_BUF_NEXT(m_at) == NULL)
+				m_last = m_at;
+			cause_len += SCTP_BUF_LEN(m_at);
+		}
+		padding_len = cause_len % 4;
+		if (padding_len != 0) {
+			padding_len = 4 - padding_len;
+		}
+		if (padding_len != 0) {
+			if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
+				sctp_m_freem(cause);
+				return;
+			}
+		}
+	} else {
+		padding_len = 0;
+	}
+	/* Get an mbuf for the header. */
+	len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
+	switch (dst->sa_family) {
+#ifdef INET
+	case AF_INET:
+		len += sizeof(struct ip);
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		len += sizeof(struct ip6_hdr);
+		break;
+#endif
+	default:
+		break;
+	}
+#if defined(INET) || defined(INET6)
+	if (port) {
+		len += sizeof(struct udphdr);
+	}
+#endif
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
+	mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
+#else
+	mout = sctp_get_mbuf_for_msg(len + SCTP_MAX_LINKHDR, 1, M_NOWAIT, 1, MT_DATA);
+#endif
+#else
+	mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
+#endif
+	if (mout == NULL) {
+		if (cause) {
+			sctp_m_freem(cause);
+		}
+		return;
+	}
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD)
+	SCTP_BUF_RESV_UF(mout, max_linkhdr);
+#else
+	SCTP_BUF_RESV_UF(mout, SCTP_MAX_LINKHDR);
+#endif
+#else
+	SCTP_BUF_RESV_UF(mout, max_linkhdr);
+#endif
+	SCTP_BUF_LEN(mout) = len;
+	SCTP_BUF_NEXT(mout) = cause;
+#if defined(__FreeBSD__)
+	M_SETFIB(mout, fibnum);
+	mout->m_pkthdr.flowid = mflowid;
+	M_HASHTYPE_SET(mout, mflowtype);
+#endif
+#ifdef INET
+	ip = NULL;
+#endif
+#ifdef INET6
+	ip6 = NULL;
+#endif
+	switch (dst->sa_family) {
+#ifdef INET
+	case AF_INET:
+		src_sin = (struct sockaddr_in *)src;
+		dst_sin = (struct sockaddr_in *)dst;
+		ip = mtod(mout, struct ip *);
+		ip->ip_v = IPVERSION;
+		ip->ip_hl = (sizeof(struct ip) >> 2);
+		ip->ip_tos = 0;
+		ip->ip_off = 0;
+#if defined(__FreeBSD__)
+		ip_fillid(ip);
+#elif defined(__APPLE__)
+#if RANDOM_IP_ID
+		ip->ip_id = ip_randomid();
+#else
+		ip->ip_id = htons(ip_id++);
+#endif
+#elif defined(__Userspace__)
+		ip->ip_id = htons(ip_id++);
+#else
+		ip->ip_id = ip_id++;
+#endif
+		ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
+		if (port) {
+			ip->ip_p = IPPROTO_UDP;
+		} else {
+			ip->ip_p = IPPROTO_SCTP;
+		}
+		ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
+		ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
+		ip->ip_sum = 0;
+		len = sizeof(struct ip);
+		shout = (struct sctphdr *)((caddr_t)ip + len);
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		src_sin6 = (struct sockaddr_in6 *)src;
+		dst_sin6 = (struct sockaddr_in6 *)dst;
+		ip6 = mtod(mout, struct ip6_hdr *);
+		ip6->ip6_flow = htonl(0x60000000);
+#if defined(__FreeBSD__)
+		if (V_ip6_auto_flowlabel) {
+			ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
+		}
+#endif
+#if defined(__Userspace__)
+		ip6->ip6_hlim = IPv6_HOP_LIMIT;
+#else
+		ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
+#endif
+		if (port) {
+			ip6->ip6_nxt = IPPROTO_UDP;
+		} else {
+			ip6->ip6_nxt = IPPROTO_SCTP;
+		}
+		ip6->ip6_src = dst_sin6->sin6_addr;
+		ip6->ip6_dst = src_sin6->sin6_addr;
+		len = sizeof(struct ip6_hdr);
+		shout = (struct sctphdr *)((caddr_t)ip6 + len);
+		break;
+#endif
+	default:
+		len = 0;
+		shout = mtod(mout, struct sctphdr *);
+		break;
+	}
+#if defined(INET) || defined(INET6)
+	if (port) {
+		if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
+			sctp_m_freem(mout);
+			return;
+		}
+		udp = (struct udphdr *)shout;
+		udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
+		udp->uh_dport = port;
+		udp->uh_sum = 0;
+		udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
+		                                sizeof(struct sctphdr) +
+		                                sizeof(struct sctp_chunkhdr) +
+		                                cause_len + padding_len));
+		len += sizeof(struct udphdr);
+		shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
+	} else {
+		udp = NULL;
+	}
+#endif
+	shout->src_port = sh->dest_port;
+	shout->dest_port = sh->src_port;
+	shout->checksum = 0;
+	if (vtag) {
+		shout->v_tag = htonl(vtag);
+	} else {
+		shout->v_tag = sh->v_tag;
+	}
+	len += sizeof(struct sctphdr);
+	ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
+	ch->chunk_type = type;
+	if (vtag) {
+		ch->chunk_flags = 0;
+	} else {
+		ch->chunk_flags = SCTP_HAD_NO_TCB;
+	}
+	ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
+	len += sizeof(struct sctp_chunkhdr);
+	len += cause_len + padding_len;
+
+	if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
+		sctp_m_freem(mout);
+		return;
+	}
+	SCTP_ATTACH_CHAIN(o_pak, mout, len);
+	switch (dst->sa_family) {
+#ifdef INET
+	case AF_INET:
+#if defined(__APPLE__) || defined(__Panda__)
+		/* zap the stack pointer to the route */
+		bzero(&ro, sizeof(sctp_route_t));
+#if defined(__Panda__)
+		ro._l_addr.sa.sa_family = AF_INET;
+#endif
+#endif
+		if (port) {
+#if !defined(__Windows__) && !defined(__Userspace__)
+#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
+			if (V_udp_cksum) {
+				udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+			} else {
+				udp->uh_sum = 0;
+			}
+#else
+			udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
+#endif
+#else
+			udp->uh_sum = 0;
+#endif
+		}
+#if defined(__FreeBSD__)
+#if __FreeBSD_version >= 1000000
+		ip->ip_len = htons(len);
+#else
+		ip->ip_len = len;
+#endif
+#elif defined(__APPLE__) || defined(__Userspace__)
+		ip->ip_len = len;
+#else
+		ip->ip_len = htons(len);
+#endif
+		if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#if !defined(__Windows__) && !defined(__Userspace__)
+#if defined(__FreeBSD__) && ((__FreeBSD_version > 803000 && __FreeBSD_version < 900000) || __FreeBSD_version > 900000)
+			if (V_udp_cksum) {
+				SCTP_ENABLE_UDP_CSUM(o_pak);
+			}
+#else
+			SCTP_ENABLE_UDP_CSUM(o_pak);
+#endif
+#endif
+		} else {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+#if defined(__FreeBSD__) && __FreeBSD_version >= 800000
+			mout->m_pkthdr.csum_flags = CSUM_SCTP;
+			mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+#else
+			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#endif
+		}
+#ifdef SCTP_PACKET_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
+			sctp_packet_log(o_pak);
+		}
+#endif
+#if defined(__APPLE__) || defined(__Panda__)
+		SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
+		/* Free the route if we got one back */
+		if (ro.ro_rt) {
+			RTFREE(ro.ro_rt);
+			ro.ro_rt = NULL;
+		}
+#else
+		SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
+#endif
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		ip6->ip6_plen = (uint16_t)(len - sizeof(struct ip6_hdr));
+		if (port) {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#if defined(__Windows__)
+			udp->uh_sum = 0;
+#elif !defined(__Userspace__)
+			if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
+				udp->uh_sum = 0xffff;
+			}
+#endif
+		} else {
+#if defined(SCTP_WITH_NO_CSUM)
+			SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+#if defined(__FreeBSD__) && __FreeBSD_version >= 900000
+#if __FreeBSD_version > 901000
+			mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
+#else
+			mout->m_pkthdr.csum_flags = CSUM_SCTP;
+#endif
+			mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+#else
+			shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr));
+			SCTP_STAT_INCR(sctps_sendswcrc);
+#endif
+#endif
+		}
+#ifdef SCTP_PACKET_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
+			sctp_packet_log(o_pak);
+		}
+#endif
+		SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+	{
+		char *buffer;
+		struct sockaddr_conn *sconn;
+
+		sconn = (struct sockaddr_conn *)src;
+#if defined(SCTP_WITH_NO_CSUM)
+		SCTP_STAT_INCR(sctps_sendnocrc);
+#else
+		if (SCTP_BASE_VAR(crc32c_offloaded) == 0) {
+			shout->checksum = sctp_calculate_cksum(mout, 0);
+			SCTP_STAT_INCR(sctps_sendswcrc);
+		} else {
+			SCTP_STAT_INCR(sctps_sendhwcrc);
+		}
+#endif
+#ifdef SCTP_PACKET_LOGGING
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
+			sctp_packet_log(mout);
+		}
+#endif
+		/* Don't alloc/free for each packet */
+		if ((buffer = malloc(len)) != NULL) {
+			m_copydata(mout, 0, len, buffer);
+			SCTP_BASE_VAR(conn_output)(sconn->sconn_addr, buffer, len, 0, 0);
+			free(buffer);
+		}
+		sctp_m_freem(mout);
+		break;
+	}
+#endif
+	default:
+		SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
+		        dst->sa_family);
+		sctp_m_freem(mout);
+		SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+		return;
+	}
+	SCTP_STAT_INCR(sctps_sendpackets);
+	SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
+	SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
+	return;
+}
+
+void
+sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
+                             struct sctphdr *sh,
+#if defined(__FreeBSD__)
+                             uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
+#endif
+                             uint32_t vrf_id, uint16_t port)
+{
+	sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
+#if defined(__FreeBSD__)
+	                   mflowtype, mflowid, fibnum,
+#endif
+	                   vrf_id, port);
+}
+
+void
+sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net,int so_locked
+#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
+	SCTP_UNUSED
+#endif
+)
+{
+	struct sctp_tmit_chunk *chk;
+	struct sctp_heartbeat_chunk *hb;
+	struct timeval now;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (net == NULL) {
+		return;
+	}
+	(void)SCTP_GETTIME_TIMEVAL(&now);
+	switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		break;
+#endif
+	default:
+		return;
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
+		return;
+	}
+
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->send_size = sizeof(struct sctp_heartbeat_chunk);
+
+	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->whoTo = net;
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	/* Now we have a mbuf that we can fill in with the details */
+	hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
+	memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
+	/* fill out chunk header */
+	hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
+	hb->ch.chunk_flags = 0;
+	hb->ch.chunk_length = htons(chk->send_size);
+	/* Fill out hb parameter */
+	hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
+	hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
+	hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
+	hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
+	/* Did our user request this one, put it in */
+	hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
+#ifdef HAVE_SA_LEN
+	hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
+#else
+	switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in);
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_in6);
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		hb->heartbeat.hb_info.addr_len = sizeof(struct sockaddr_conn);
+		break;
+#endif
+	default:
+		hb->heartbeat.hb_info.addr_len = 0;
+		break;
+	}
+#endif
+	if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
+		/*
+		 * we only take from the entropy pool if the address is not
+		 * confirmed.
+		 */
+		net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
+		net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
+	} else {
+		net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
+		net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
+	}
+	switch (net->ro._l_addr.sa.sa_family) {
+#ifdef INET
+	case AF_INET:
+		memcpy(hb->heartbeat.hb_info.address,
+		       &net->ro._l_addr.sin.sin_addr,
+		       sizeof(net->ro._l_addr.sin.sin_addr));
+		break;
+#endif
+#ifdef INET6
+	case AF_INET6:
+		memcpy(hb->heartbeat.hb_info.address,
+		       &net->ro._l_addr.sin6.sin6_addr,
+		       sizeof(net->ro._l_addr.sin6.sin6_addr));
+		break;
+#endif
+#if defined(__Userspace__)
+	case AF_CONN:
+		memcpy(hb->heartbeat.hb_info.address,
+		       &net->ro._l_addr.sconn.sconn_addr,
+		       sizeof(net->ro._l_addr.sconn.sconn_addr));
+		break;
+#endif
+	default:
+		if (chk->data) {
+			sctp_m_freem(chk->data);
+			chk->data = NULL;
+		}
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		return;
+		break;
+	}
+	net->hb_responded = 0;
+	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+	stcb->asoc.ctrl_queue_cnt++;
+	SCTP_STAT_INCR(sctps_sendheartbeat);
+	return;
+}
+
+void
+sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
+		   uint32_t high_tsn)
+{
+	struct sctp_association *asoc;
+	struct sctp_ecne_chunk *ecne;
+	struct sctp_tmit_chunk *chk;
+
+	if (net == NULL) {
+		return;
+	}
+	asoc = &stcb->asoc;
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
+			/* found a previous ECN_ECHO update it if needed */
+			uint32_t cnt, ctsn;
+			ecne = mtod(chk->data, struct sctp_ecne_chunk *);
+			ctsn = ntohl(ecne->tsn);
+			if (SCTP_TSN_GT(high_tsn, ctsn)) {
+				ecne->tsn = htonl(high_tsn);
+				SCTP_STAT_INCR(sctps_queue_upd_ecne);
+			}
+			cnt = ntohl(ecne->num_pkts_since_cwr);
+			cnt++;
+			ecne->num_pkts_since_cwr = htonl(cnt);
+			return;
+		}
+	}
+	/* nope could not find one to update so we must build one */
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		return;
+	}
+	SCTP_STAT_INCR(sctps_queue_upd_ecne);
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_ECN_ECHO;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->send_size = sizeof(struct sctp_ecne_chunk);
+	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->whoTo = net;
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+
+	stcb->asoc.ecn_echo_cnt_onq++;
+	ecne = mtod(chk->data, struct sctp_ecne_chunk *);
+	ecne->ch.chunk_type = SCTP_ECN_ECHO;
+	ecne->ch.chunk_flags = 0;
+	ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
+	ecne->tsn = htonl(high_tsn);
+	ecne->num_pkts_since_cwr = htonl(1);
+	TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
+	asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
+    struct mbuf *m, int len, int iphlen, int bad_crc)
+{
+	struct sctp_association *asoc;
+	struct sctp_pktdrop_chunk *drp;
+	struct sctp_tmit_chunk *chk;
+	uint8_t *datap;
+	int was_trunc = 0;
+	int fullsz = 0;
+	long spc;
+	int offset;
+	struct sctp_chunkhdr *ch, chunk_buf;
+	unsigned int chk_length;
+
+        if (!stcb) {
+            return;
+        }
+	asoc = &stcb->asoc;
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (asoc->pktdrop_supported == 0) {
+		/*-
+		 * peer must declare support before I send one.
+		 */
+		return;
+	}
+	if (stcb->sctp_socket == NULL) {
+		return;
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	len -= iphlen;
+	chk->send_size = len;
+        /* Validate that we do not have an ABORT in here. */
+	offset = iphlen + sizeof(struct sctphdr);
+	ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+						   sizeof(*ch), (uint8_t *) & chunk_buf);
+	while (ch != NULL) {
+		chk_length = ntohs(ch->chunk_length);
+		if (chk_length < sizeof(*ch)) {
+			/* break to abort land */
+			break;
+		}
+		switch (ch->chunk_type) {
+		case SCTP_PACKET_DROPPED:
+		case SCTP_ABORT_ASSOCIATION:
+		case SCTP_INITIATION_ACK:
+			/**
+			 * We don't respond with an PKT-DROP to an ABORT
+			 * or PKT-DROP. We also do not respond to an
+			 * INIT-ACK, because we can't know if the initiation
+			 * tag is correct or not.
+			 */
+			sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+			return;
+		default:
+			break;
+		}
+		offset += SCTP_SIZE32(chk_length);
+		ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
+		    sizeof(*ch), (uint8_t *) & chunk_buf);
+	}
+
+	if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
+	    min(stcb->asoc.smallest_mtu, MCLBYTES)) {
+		/* only send 1 mtu worth, trim off the
+		 * excess on the end.
+		 */
+		fullsz = len;
+		len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
+		was_trunc = 1;
+	}
+	chk->asoc = &stcb->asoc;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+jump_out:
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
+	if (drp == NULL) {
+		sctp_m_freem(chk->data);
+		chk->data = NULL;
+		goto jump_out;
+	}
+	chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
+	    sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
+	chk->book_size_scale = 0;
+	if (was_trunc) {
+		drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
+		drp->trunc_len = htons(fullsz);
+		/* Len is already adjusted to size minus overhead above
+		 * take out the pkt_drop chunk itself from it.
+		 */
+		chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
+		len = chk->send_size;
+	} else {
+		/* no truncation needed */
+		drp->ch.chunk_flags = 0;
+		drp->trunc_len = htons(0);
+	}
+	if (bad_crc) {
+		drp->ch.chunk_flags |= SCTP_BADCRC;
+	}
+	chk->send_size += sizeof(struct sctp_pktdrop_chunk);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (net) {
+		/* we should hit here */
+		chk->whoTo = net;
+		atomic_add_int(&chk->whoTo->ref_count, 1);
+	} else {
+		chk->whoTo = NULL;
+	}
+	drp->ch.chunk_type = SCTP_PACKET_DROPPED;
+	drp->ch.chunk_length = htons(chk->send_size);
+	spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
+	if (spc < 0) {
+		spc = 0;
+	}
+	drp->bottle_bw = htonl(spc);
+	if (asoc->my_rwnd) {
+		drp->current_onq = htonl(asoc->size_on_reasm_queue +
+		    asoc->size_on_all_streams +
+		    asoc->my_rwnd_control_len +
+		    stcb->sctp_socket->so_rcv.sb_cc);
+	} else {
+		/*-
+		 * If my rwnd is 0, possibly from mbuf depletion as well as
+		 * space used, tell the peer there is NO space aka onq == bw
+		 */
+		drp->current_onq = htonl(spc);
+	}
+	drp->reserved = 0;
+	datap = drp->data;
+	m_copydata(m, iphlen, len, (caddr_t)datap);
+	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+	asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
+{
+	struct sctp_association *asoc;
+	struct sctp_cwr_chunk *cwr;
+	struct sctp_tmit_chunk *chk;
+
+	SCTP_TCB_LOCK_ASSERT(stcb);
+	if (net == NULL) {
+		return;
+	}
+	asoc = &stcb->asoc;
+	TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
+		if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
+			/* found a previous CWR queued to same destination update it if needed */
+			uint32_t ctsn;
+			cwr = mtod(chk->data, struct sctp_cwr_chunk *);
+			ctsn = ntohl(cwr->tsn);
+			if (SCTP_TSN_GT(high_tsn, ctsn)) {
+				cwr->tsn = htonl(high_tsn);
+			}
+			if (override & SCTP_CWR_REDUCE_OVERRIDE) {
+				/* Make sure override is carried */
+				cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
+			}
+			return;
+		}
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_ECN_CWR;
+	chk->rec.chunk_id.can_take_data = 1;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->send_size = sizeof(struct sctp_cwr_chunk);
+	chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	chk->whoTo = net;
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	cwr = mtod(chk->data, struct sctp_cwr_chunk *);
+	cwr->ch.chunk_type = SCTP_ECN_CWR;
+	cwr->ch.chunk_flags = override;
+	cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
+	cwr->tsn = htonl(high_tsn);
+	TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
+	asoc->ctrl_queue_cnt++;
+}
+
+static int
+sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
+                          uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
+{
+	uint16_t len, old_len, i;
+	struct sctp_stream_reset_out_request *req_out;
+	struct sctp_chunkhdr *ch;
+	int at;
+	int number_entries=0;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+	/* get to new offset for the param. */
+	req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+		if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
+		    (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
+		    TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
+			number_entries++;
+		}
+	}
+	if (number_entries == 0) {
+		return (0);
+	}
+	if (number_entries == stcb->asoc.streamoutcnt) {
+		number_entries = 0;
+	}
+	if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
+		number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
+	}
+	len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
+	req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
+	req_out->ph.param_length = htons(len);
+	req_out->request_seq = htonl(seq);
+	req_out->response_seq = htonl(resp_seq);
+	req_out->send_reset_at_tsn = htonl(last_sent);
+	at = 0;
+	if (number_entries) {
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
+			    (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
+			    TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
+				req_out->list_of_streams[at] = htons(i);
+				at++;
+				stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
+				if (at >= number_entries) {
+					break;
+				}
+			}
+		}
+	} else {
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
+		}
+	}
+	if (SCTP_SIZE32(len) > len) {
+		/*-
+		 * Need to worry about the pad we may end up adding to the
+		 * end. This is easy since the struct is either aligned to 4
+		 * bytes or 2 bytes off.
+		 */
+		req_out->list_of_streams[number_entries] = 0;
+	}
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->book_size = len + old_len;
+	chk->book_size_scale = 0;
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	return (1);
+}
+
+static void
+sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
+                         int number_entries, uint16_t *list,
+                         uint32_t seq)
+{
+	uint16_t len, old_len, i;
+	struct sctp_stream_reset_in_request *req_in;
+	struct sctp_chunkhdr *ch;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
+	req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
+	req_in->ph.param_length = htons(len);
+	req_in->request_seq = htonl(seq);
+	if (number_entries) {
+		for (i = 0; i < number_entries; i++) {
+			req_in->list_of_streams[i] = htons(list[i]);
+		}
+	}
+	if (SCTP_SIZE32(len) > len) {
+		/*-
+		 * Need to worry about the pad we may end up adding to the
+		 * end. This is easy since the struct is either aligned to 4
+		 * bytes or 2 bytes off.
+		 */
+		req_in->list_of_streams[number_entries] = 0;
+	}
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->book_size = len + old_len;
+	chk->book_size_scale = 0;
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	return;
+}
+
+static void
+sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
+                          uint32_t seq)
+{
+	uint16_t len, old_len;
+	struct sctp_stream_reset_tsn_request *req_tsn;
+	struct sctp_chunkhdr *ch;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = sizeof(struct sctp_stream_reset_tsn_request);
+	req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
+	req_tsn->ph.param_length = htons(len);
+	req_tsn->request_seq = htonl(seq);
+
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->send_size = len + old_len;
+	chk->book_size = SCTP_SIZE32(chk->send_size);
+	chk->book_size_scale = 0;
+	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
+	return;
+}
+
+void
+sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
+                             uint32_t resp_seq, uint32_t result)
+{
+	uint16_t len, old_len;
+	struct sctp_stream_reset_response *resp;
+	struct sctp_chunkhdr *ch;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = sizeof(struct sctp_stream_reset_response);
+	resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
+	resp->ph.param_length = htons(len);
+	resp->response_seq = htonl(resp_seq);
+	resp->result = ntohl(result);
+
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->book_size = len + old_len;
+	chk->book_size_scale = 0;
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	return;
+}
+
+void
+sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
+				 struct sctp_stream_reset_list *ent,
+				 int response)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_chunkhdr *ch;
+
+	asoc = &stcb->asoc;
+
+	/*
+	 * Reset our last reset action to the new one IP -> response
+	 * (PERFORMED probably). This assures that if we fail to send, a
+	 * retran from the peer will get the new response.
+	 */
+	asoc->last_reset_action[0] = response;
+	if (asoc->stream_reset_outstanding) {
+		return;
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return;
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->book_size = sizeof(struct sctp_chunkhdr);
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return;
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+	/* setup chunk parameters */
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (stcb->asoc.alternate) {
+		chk->whoTo = stcb->asoc.alternate;
+	} else {
+		chk->whoTo = stcb->asoc.primary_destination;
+	}
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	ch->chunk_type = SCTP_STREAM_RESET;
+	ch->chunk_flags = 0;
+	ch->chunk_length = htons(chk->book_size);
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	sctp_add_stream_reset_result(chk, ent->seq, response);
+	/* insert the chunk for sending */
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+			  chk,
+			  sctp_next);
+	asoc->ctrl_queue_cnt++;
+}
+
+void
+sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
+                                 uint32_t resp_seq, uint32_t result,
+                                 uint32_t send_una, uint32_t recv_next)
+{
+	uint16_t len, old_len;
+	struct sctp_stream_reset_response_tsn *resp;
+	struct sctp_chunkhdr *ch;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = sizeof(struct sctp_stream_reset_response_tsn);
+	resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
+	resp->ph.param_length = htons(len);
+	resp->response_seq = htonl(resp_seq);
+	resp->result = htonl(result);
+	resp->senders_next_tsn = htonl(send_una);
+	resp->receivers_next_tsn = htonl(recv_next);
+
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->book_size = len + old_len;
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	return;
+}
+
+static void
+sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
+		       uint32_t seq,
+		       uint16_t adding)
+{
+	uint16_t len, old_len;
+	struct sctp_chunkhdr *ch;
+	struct sctp_stream_reset_add_strm *addstr;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = sizeof(struct sctp_stream_reset_add_strm);
+
+	/* Fill it out. */
+	addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
+	addstr->ph.param_length = htons(len);
+	addstr->request_seq = htonl(seq);
+	addstr->number_of_streams = htons(adding);
+	addstr->reserved = 0;
+
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->send_size = len + old_len;
+	chk->book_size = SCTP_SIZE32(chk->send_size);
+	chk->book_size_scale = 0;
+	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
+	return;
+}
+
+static void
+sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
+                      uint32_t seq,
+                      uint16_t adding)
+{
+	uint16_t len, old_len;
+	struct sctp_chunkhdr *ch;
+	struct sctp_stream_reset_add_strm *addstr;
+
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
+
+	/* get to new offset for the param. */
+	addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
+	/* now how long will this param be? */
+	len = sizeof(struct sctp_stream_reset_add_strm);
+	/* Fill it out. */
+	addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
+	addstr->ph.param_length = htons(len);
+	addstr->request_seq = htonl(seq);
+	addstr->number_of_streams = htons(adding);
+	addstr->reserved = 0;
+
+	/* now fix the chunk length */
+	ch->chunk_length = htons(len + old_len);
+	chk->send_size = len + old_len;
+	chk->book_size = SCTP_SIZE32(chk->send_size);
+	chk->book_size_scale = 0;
+	SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
+	return;
+}
+
+int
+sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_chunkhdr *ch;
+	uint32_t seq;
+
+	asoc = &stcb->asoc;
+	asoc->trigger_reset = 0;
+	if (asoc->stream_reset_outstanding) {
+		return (EALREADY);
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->book_size = sizeof(struct sctp_chunkhdr);
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+
+	/* setup chunk parameters */
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (stcb->asoc.alternate) {
+		chk->whoTo = stcb->asoc.alternate;
+	} else {
+		chk->whoTo = stcb->asoc.primary_destination;
+	}
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	ch->chunk_type = SCTP_STREAM_RESET;
+	ch->chunk_flags = 0;
+	ch->chunk_length = htons(chk->book_size);
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+	seq = stcb->asoc.str_reset_seq_out;
+	if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
+		seq++;
+		asoc->stream_reset_outstanding++;
+	} else {
+		m_freem(chk->data);
+		chk->data = NULL;
+		sctp_free_a_chunk(stcb, chk, so_locked);
+		return (ENOENT);
+	}
+	asoc->str_reset = chk;
+	/* insert the chunk for sending */
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+			  chk,
+			  sctp_next);
+	asoc->ctrl_queue_cnt++;
+
+	if (stcb->asoc.send_sack) {
+		sctp_send_sack(stcb, so_locked);
+	}
+	sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
+	return (0);
+}
+
+int
+sctp_send_str_reset_req(struct sctp_tcb *stcb,
+                        uint16_t number_entries, uint16_t *list,
+                        uint8_t send_in_req,
+                        uint8_t send_tsn_req,
+                        uint8_t add_stream,
+                        uint16_t adding_o,
+                        uint16_t adding_i, uint8_t peer_asked)
+{
+	struct sctp_association *asoc;
+	struct sctp_tmit_chunk *chk;
+	struct sctp_chunkhdr *ch;
+	int can_send_out_req=0;
+	uint32_t seq;
+
+	asoc = &stcb->asoc;
+	if (asoc->stream_reset_outstanding) {
+		/*-
+		 * Already one pending, must get ACK back to clear the flag.
+		 */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
+		return (EBUSY);
+	}
+	if ((send_in_req == 0) && (send_tsn_req == 0) &&
+	    (add_stream == 0)) {
+		/* nothing to do */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		return (EINVAL);
+	}
+	if (send_tsn_req && send_in_req) {
+		/* error, can't do that */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		return (EINVAL);
+	} else if (send_in_req) {
+		can_send_out_req = 1;
+	}
+	if (number_entries > (MCLBYTES -
+	                      SCTP_MIN_OVERHEAD -
+	                      sizeof(struct sctp_chunkhdr) -
+	                      sizeof(struct sctp_stream_reset_out_request)) /
+	                     sizeof(uint16_t)) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	sctp_alloc_a_chunk(stcb, chk);
+	if (chk == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	chk->copy_by_ref = 0;
+	chk->rec.chunk_id.id = SCTP_STREAM_RESET;
+	chk->rec.chunk_id.can_take_data = 0;
+	chk->flags = 0;
+	chk->asoc = &stcb->asoc;
+	chk->book_size = sizeof(struct sctp_chunkhdr);
+	chk->send_size = SCTP_SIZE32(chk->book_size);
+	chk->book_size_scale = 0;
+
+	chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
+	if (chk->data == NULL) {
+		sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		return (ENOMEM);
+	}
+	SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
+
+	/* setup chunk parameters */
+	chk->sent = SCTP_DATAGRAM_UNSENT;
+	chk->snd_count = 0;
+	if (stcb->asoc.alternate) {
+		chk->whoTo = stcb->asoc.alternate;
+	} else {
+		chk->whoTo = stcb->asoc.primary_destination;
+	}
+	atomic_add_int(&chk->whoTo->ref_count, 1);
+	ch = mtod(chk->data, struct sctp_chunkhdr *);
+	ch->chunk_type = SCTP_STREAM_RESET;
+	ch->chunk_flags = 0;
+	ch->chunk_length = htons(chk->book_size);
+	SCTP_BUF_LEN(chk->data) = chk->send_size;
+
+	seq = stcb->asoc.str_reset_seq_out;
+	if (can_send_out_req) {
+		int ret;
+	        ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
+		if (ret) {
+			seq++;
+			asoc->stream_reset_outstanding++;
+		}
+	}
+	if ((add_stream & 1) &&
+	    ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
+		/* Need to allocate more */
+		struct sctp_stream_out *oldstream;
+		struct sctp_stream_queue_pending *sp, *nsp;
+		int i;
+#if defined(SCTP_DETAILED_STR_STATS)
+		int j;
+#endif
+
+		oldstream = stcb->asoc.strmout;
+		/* get some more */
+		SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
+			    (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
+			    SCTP_M_STRMO);
+		if (stcb->asoc.strmout == NULL) {
+			uint8_t x;
+			stcb->asoc.strmout = oldstream;
+			/* Turn off the bit */
+			x = add_stream & 0xfe;
+			add_stream = x;
+			goto skip_stuff;
+		}
+		/* Ok now we proceed with copying the old out stuff and
+		 * initializing the new stuff.
+		 */
+		SCTP_TCB_SEND_LOCK(stcb);
+		stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
+		for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
+			TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
+			stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
+			stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
+			stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
+			stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
+			stcb->asoc.strmout[i].sid = i;
+			stcb->asoc.strmout[i].state = oldstream[i].state;
+			/* FIX ME FIX ME */
+			/* This should be a SS_COPY operation FIX ME STREAM SCHEDULER EXPERT */
+			stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
+			/* now anything on those queues? */
+			TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
+				TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
+				TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
+			}
+
+		}
+		/* now the new streams */
+		stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
+		for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
+			TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
+			stcb->asoc.strmout[i].chunks_on_queues = 0;
+#if defined(SCTP_DETAILED_STR_STATS)
+			for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
+				stcb->asoc.strmout[i].abandoned_sent[j] = 0;
+				stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
+			}
+#else
+			stcb->asoc.strmout[i].abandoned_sent[0] = 0;
+			stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
+#endif
+			stcb->asoc.strmout[i].next_mid_ordered = 0;
+			stcb->asoc.strmout[i].next_mid_unordered = 0;
+			stcb->asoc.strmout[i].sid = i;
+			stcb->asoc.strmout[i].last_msg_incomplete = 0;
+			stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
+			stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
+		}
+		stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
+		SCTP_FREE(oldstream, SCTP_M_STRMO);
+		SCTP_TCB_SEND_UNLOCK(stcb);
+	}
+skip_stuff:
+	if ((add_stream & 1) && (adding_o > 0)) {
+		asoc->strm_pending_add_size = adding_o;
+		asoc->peer_req_out = peer_asked;
+		sctp_add_an_out_stream(chk, seq, adding_o);
+		seq++;
+		asoc->stream_reset_outstanding++;
+	}
+	if ((add_stream & 2) && (adding_i > 0)) {
+		sctp_add_an_in_stream(chk, seq, adding_i);
+		seq++;
+		asoc->stream_reset_outstanding++;
+	}
+	if (send_in_req) {
+		sctp_add_stream_reset_in(chk, number_entries, list, seq);
+		seq++;
+		asoc->stream_reset_outstanding++;
+	}
+	if (send_tsn_req) {
+		sctp_add_stream_reset_tsn(chk, seq);
+		asoc->stream_reset_outstanding++;
+	}
+	asoc->str_reset = chk;
+	/* insert the chunk for sending */
+	TAILQ_INSERT_TAIL(&asoc->control_send_queue,
+			  chk,
+			  sctp_next);
+	asoc->ctrl_queue_cnt++;
+	if (stcb->asoc.send_sack) {
+		sctp_send_sack(stcb, SCTP_SO_LOCKED);
+	}
+	sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
+	return (0);
+}
+
+void
+sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
+                struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
+#if defined(__FreeBSD__)
+                uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
+#endif
+                uint32_t vrf_id, uint16_t port)
+{
+	/* Don't respond to an ABORT with an ABORT. */
+	if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
+		if (cause)
+			sctp_m_freem(cause);
+		return;
+	}
+	sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
+#if defined(__FreeBSD__)
+	                   mflowtype, mflowid, fibnum,
+#endif
+	                   vrf_id, port);
+	return;
+}
+
+void
+sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
+                   struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
+#if defined(__FreeBSD__)
+                   uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
+#endif
+                   uint32_t vrf_id, uint16_t port)
+{
+	sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
+#if defined(__FreeBSD__)
+	                   mflowtype, mflowid, fibnum,
+#endif
+	                   vrf_id, port);
+	return;
+}
+
+static struct mbuf *
+sctp_copy_resume(struct uio *uio,
+		 int max_send_len,
+#if defined(__FreeBSD__) && __FreeBSD_version > 602000
+		 int user_marks_eor,
+#endif
+		 int *error,
+		 uint32_t *sndout,
+		 struct mbuf **new_tail)
+{
+#if defined(__Panda__)
+	struct mbuf *m;
+
+	m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
+			(user_marks_eor ? M_EOR : 0));
+	if (m == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		*error = ENOBUFS;
+	} else {
+		*sndout = m_length(m, NULL);
+		*new_tail = m_last(m);
+	}
+	return (m);
+#elif defined(__FreeBSD__) && __FreeBSD_version > 602000
+	struct mbuf *m;
+
+	m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
+		(M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
+	if (m == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		*error = ENOBUFS;
+	} else {
+		*sndout = m_length(m, NULL);
+		*new_tail = m_last(m);
+	}
+	return (m);
+#else
+	int left, cancpy, willcpy;
+	struct mbuf *m, *head;
+
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+	left = (int)min(uio->uio_resid, max_send_len);
+#else
+	left = (int)min(uio_resid(uio), max_send_len);
+#endif
+#else
+	left = (int)min(uio->uio_resid, max_send_len);
+#endif
+	/* Always get a header just in case */
+	head = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
+	if (head == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		*error = ENOBUFS;
+		return (NULL);
+	}
+	cancpy = (int)M_TRAILINGSPACE(head);
+	willcpy = min(cancpy, left);
+	*error = uiomove(mtod(head, caddr_t), willcpy, uio);
+	if (*error) {
+		sctp_m_freem(head);
+		return (NULL);
+	}
+	*sndout += willcpy;
+	left -= willcpy;
+	SCTP_BUF_LEN(head) = willcpy;
+	m = head;
+	*new_tail = head;
+	while (left > 0) {
+		/* move in user data */
+		SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
+		if (SCTP_BUF_NEXT(m) == NULL) {
+			sctp_m_freem(head);
+			*new_tail = NULL;
+			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+			*error = ENOBUFS;
+			return (NULL);
+		}
+		m = SCTP_BUF_NEXT(m);
+		cancpy = (int)M_TRAILINGSPACE(m);
+		willcpy = min(cancpy, left);
+		*error = uiomove(mtod(m, caddr_t), willcpy, uio);
+		if (*error) {
+			sctp_m_freem(head);
+			*new_tail = NULL;
+			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+			*error = EFAULT;
+			return (NULL);
+		}
+		SCTP_BUF_LEN(m) = willcpy;
+		left -= willcpy;
+		*sndout += willcpy;
+		*new_tail = m;
+		if (left == 0) {
+			SCTP_BUF_NEXT(m) = NULL;
+		}
+	}
+	return (head);
+#endif
+}
+
+static int
+sctp_copy_one(struct sctp_stream_queue_pending *sp,
+              struct uio *uio,
+              int resv_upfront)
+{
+#if defined(__Panda__)
+	sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
+	                       resv_upfront, 0);
+	if (sp->data == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		return (ENOBUFS);
+	}
+
+	sp->tail_mbuf = m_last(sp->data);
+	return (0);
+#elif defined(__FreeBSD__) && __FreeBSD_version > 602000
+	sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
+	                       resv_upfront, 0);
+	if (sp->data == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		return (ENOBUFS);
+	}
+
+	sp->tail_mbuf = m_last(sp->data);
+	return (0);
+#else
+	int left;
+	int cancpy, willcpy, error;
+	struct mbuf *m, *head;
+	int cpsz = 0;
+
+	/* First one gets a header */
+	left = sp->length;
+	head = m = sctp_get_mbuf_for_msg((left + resv_upfront), 0, M_WAITOK, 0, MT_DATA);
+	if (m == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+		return (ENOBUFS);
+	}
+	/*-
+	 * Add this one for m in now, that way if the alloc fails we won't
+	 * have a bad cnt.
+	 */
+	SCTP_BUF_RESV_UF(m, resv_upfront);
+	cancpy = (int)M_TRAILINGSPACE(m);
+	willcpy = min(cancpy, left);
+	while (left > 0) {
+		/* move in user data */
+		error = uiomove(mtod(m, caddr_t), willcpy, uio);
+		if (error) {
+			sctp_m_freem(head);
+			return (error);
+		}
+		SCTP_BUF_LEN(m) = willcpy;
+		left -= willcpy;
+		cpsz += willcpy;
+		if (left > 0) {
+			SCTP_BUF_NEXT(m) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 0, MT_DATA);
+			if (SCTP_BUF_NEXT(m) == NULL) {
+				/*
+				 * the head goes back to caller, he can free
+				 * the rest
+				 */
+				sctp_m_freem(head);
+				SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
+				return (ENOBUFS);
+			}
+			m = SCTP_BUF_NEXT(m);
+			cancpy = (int)M_TRAILINGSPACE(m);
+			willcpy = min(cancpy, left);
+		} else {
+			sp->tail_mbuf = m;
+			SCTP_BUF_NEXT(m) = NULL;
+		}
+	}
+	sp->data = head;
+	sp->length = cpsz;
+	return (0);
+#endif
+}
+
+
+
+static struct sctp_stream_queue_pending *
+sctp_copy_it_in(struct sctp_tcb *stcb,
+    struct sctp_association *asoc,
+    struct sctp_sndrcvinfo *srcv,
+    struct uio *uio,
+    struct sctp_nets *net,
+    int max_send_len,
+    int user_marks_eor,
+    int *error)
+
+{
+	/*-
+	 * This routine must be very careful in its work. Protocol
+	 * processing is up and running so care must be taken to spl...()
+	 * when you need to do something that may effect the stcb/asoc. The
+	 * sb is locked however. When data is copied the protocol processing
+	 * should be enabled since this is a slower operation...
+	 */
+	struct sctp_stream_queue_pending *sp = NULL;
+	int resv_in_first;
+
+	*error = 0;
+	/* Now can we send this? */
+	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+	    (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
+		/* got data while shutting down */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+		*error = ECONNRESET;
+		goto out_now;
+	}
+	sctp_alloc_a_strmoq(stcb, sp);
+	if (sp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+		*error = ENOMEM;
+		goto out_now;
+	}
+	sp->act_flags = 0;
+	sp->sender_all_done = 0;
+	sp->sinfo_flags = srcv->sinfo_flags;
+	sp->timetolive = srcv->sinfo_timetolive;
+	sp->ppid = srcv->sinfo_ppid;
+	sp->context = srcv->sinfo_context;
+	sp->fsn = 0;
+	(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
+
+	sp->sid = srcv->sinfo_stream;
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+	sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
+#else
+	sp->length = (uint32_t)min(uio_resid(uio), max_send_len);
+#endif
+#else
+	sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
+#endif
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+	if ((sp->length == (uint32_t)uio->uio_resid) &&
+#else
+	if ((sp->length == (uint32_t)uio_resid(uio)) &&
+#endif
+#else
+	if ((sp->length == (uint32_t)uio->uio_resid) &&
+#endif
+	    ((user_marks_eor == 0) ||
+	     (srcv->sinfo_flags & SCTP_EOF) ||
+	     (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
+		sp->msg_is_complete = 1;
+	} else {
+		sp->msg_is_complete = 0;
+	}
+	sp->sender_all_done = 0;
+	sp->some_taken = 0;
+	sp->put_last_out = 0;
+	resv_in_first = sizeof(struct sctp_data_chunk);
+	sp->data = sp->tail_mbuf = NULL;
+	if (sp->length == 0) {
+		*error = 0;
+		goto skip_copy;
+	}
+	if (srcv->sinfo_keynumber_valid) {
+		sp->auth_keyid = srcv->sinfo_keynumber;
+	} else {
+		sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
+	}
+	if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
+		sctp_auth_key_acquire(stcb, sp->auth_keyid);
+		sp->holds_key_ref = 1;
+	}
+#if defined(__APPLE__)
+	SCTP_SOCKET_UNLOCK(SCTP_INP_SO(stcb->sctp_ep), 0);
+#endif
+	*error = sctp_copy_one(sp, uio, resv_in_first);
+#if defined(__APPLE__)
+	SCTP_SOCKET_LOCK(SCTP_INP_SO(stcb->sctp_ep), 0);
+#endif
+ skip_copy:
+	if (*error) {
+		sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
+		sp = NULL;
+	} else {
+		if (sp->sinfo_flags & SCTP_ADDR_OVER) {
+			sp->net = net;
+			atomic_add_int(&sp->net->ref_count, 1);
+		} else {
+			sp->net = NULL;
+		}
+		sctp_set_prsctp_policy(sp);
+	}
+out_now:
+	return (sp);
+}
+
+
+int
+sctp_sosend(struct socket *so,
+            struct sockaddr *addr,
+            struct uio *uio,
+#ifdef __Panda__
+            pakhandle_type top,
+            pakhandle_type icontrol,
+#else
+            struct mbuf *top,
+            struct mbuf *control,
+#endif
+#if defined(__APPLE__) || defined(__Panda__)
+            int flags
+#else
+            int flags,
+#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
+            struct thread *p
+#elif defined(__Windows__)
+            PKTHREAD p
+#else
+#if defined(__Userspace__)
+            /*
+	     * proc is a dummy in __Userspace__ and will not be passed
+	     * to sctp_lower_sosend
+	     */
+#endif
+            struct proc *p
+#endif
+#endif
+)
+{
+#ifdef __Panda__
+	struct mbuf *control = NULL;
+#endif
+#if defined(__APPLE__)
+	struct proc *p = current_proc();
+#endif
+	int error, use_sndinfo = 0;
+	struct sctp_sndrcvinfo sndrcvninfo;
+	struct sockaddr *addr_to_use;
+#if defined(INET) && defined(INET6)
+	struct sockaddr_in sin;
+#endif
+
+#if defined(__APPLE__)
+	SCTP_SOCKET_LOCK(so, 1);
+#endif
+#ifdef __Panda__
+	control = SCTP_HEADER_TO_CHAIN(icontrol);
+#endif
+	if (control) {
+		/* process cmsg snd/rcv info (maybe a assoc-id) */
+		if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
+		    sizeof(sndrcvninfo))) {
+			/* got one */
+			use_sndinfo = 1;
+		}
+	}
+	addr_to_use = addr;
+#if defined(INET) && defined(INET6)
+	if ((addr) && (addr->sa_family == AF_INET6)) {
+		struct sockaddr_in6 *sin6;
+
+		sin6 = (struct sockaddr_in6 *)addr;
+		if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+			in6_sin6_2_sin(&sin, sin6);
+			addr_to_use = (struct sockaddr *)&sin;
+		}
+	}
+#endif
+	error = sctp_lower_sosend(so, addr_to_use, uio, top,
+#ifdef __Panda__
+				  icontrol,
+#else
+				  control,
+#endif
+				  flags,
+				  use_sndinfo ? &sndrcvninfo: NULL
+#if !(defined(__Panda__) || defined(__Userspace__))
+				  , p
+#endif
+		);
+#if defined(__APPLE__)
+	SCTP_SOCKET_UNLOCK(so, 1);
+#endif
+	return (error);
+}
+
+
+int
+sctp_lower_sosend(struct socket *so,
+                  struct sockaddr *addr,
+                  struct uio *uio,
+#ifdef __Panda__
+                  pakhandle_type i_pak,
+                  pakhandle_type i_control,
+#else
+                  struct mbuf *i_pak,
+                  struct mbuf *control,
+#endif
+                  int flags,
+                  struct sctp_sndrcvinfo *srcv
+#if !(defined( __Panda__) || defined(__Userspace__))
+                  ,
+#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
+                  struct thread *p
+#elif defined(__Windows__)
+                  PKTHREAD p
+#else
+                  struct proc *p
+#endif
+#endif
+	)
+{
+	unsigned int sndlen = 0, max_len;
+	int error, len;
+	struct mbuf *top = NULL;
+#ifdef __Panda__
+	struct mbuf *control = NULL;
+#endif
+	int queue_only = 0, queue_only_for_init = 0;
+	int free_cnt_applied = 0;
+	int un_sent;
+	int now_filled = 0;
+	unsigned int inqueue_bytes = 0;
+	struct sctp_block_entry be;
+	struct sctp_inpcb *inp;
+	struct sctp_tcb *stcb = NULL;
+	struct timeval now;
+	struct sctp_nets *net;
+	struct sctp_association *asoc;
+	struct sctp_inpcb *t_inp;
+	int user_marks_eor;
+	int create_lock_applied = 0;
+	int nagle_applies = 0;
+	int some_on_control = 0;
+	int got_all_of_the_send = 0;
+	int hold_tcblock = 0;
+	int non_blocking = 0;
+	uint32_t local_add_more, local_soresv = 0;
+	uint16_t port;
+	uint16_t sinfo_flags;
+	sctp_assoc_t sinfo_assoc_id;
+
+	error = 0;
+	net = NULL;
+	stcb = NULL;
+	asoc = NULL;
+
+#if defined(__APPLE__)
+	sctp_lock_assert(so);
+#endif
+	t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
+	if (inp == NULL) {
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		if (i_pak) {
+			SCTP_RELEASE_PKT(i_pak);
+		}
+		return (error);
+	}
+	if ((uio == NULL) && (i_pak == NULL)) {
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		return (EINVAL);
+	}
+	user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
+	atomic_add_int(&inp->total_sends, 1);
+	if (uio) {
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+		if (uio->uio_resid < 0) {
+#else
+		if (uio_resid(uio) < 0) {
+#endif
+#else
+		if (uio->uio_resid < 0) {
+#endif
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			return (EINVAL);
+		}
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+		sndlen = (unsigned int)uio->uio_resid;
+#else
+		sndlen = (unsigned int)uio_resid(uio);
+#endif
+#else
+		sndlen = (unsigned int)uio->uio_resid;
+#endif
+	} else {
+		top = SCTP_HEADER_TO_CHAIN(i_pak);
+#ifdef __Panda__
+		/*-
+		 * app len indicates the datalen, dgsize for cases
+		 * of SCTP_EOF/ABORT will not have the right len
+		 */
+		sndlen = SCTP_APP_DATA_LEN(i_pak);
+		/*-
+		 * Set the particle len also to zero to match
+		 * up with app len. We only have one particle
+		 * if app len is zero for Panda. This is ensured
+		 * in the socket lib
+		 */
+		if (sndlen == 0) {
+			SCTP_BUF_LEN(top)  = 0;
+		}
+		/*-
+		 * We delink the chain from header, but keep
+		 * the header around as we will need it in
+		 * EAGAIN case
+		 */
+		SCTP_DETACH_HEADER_FROM_CHAIN(i_pak);
+#else
+		sndlen = SCTP_HEADER_LEN(i_pak);
+#endif
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
+		(void *)addr,
+	        sndlen);
+#ifdef __Panda__
+	if (i_control) {
+		control = SCTP_HEADER_TO_CHAIN(i_control);
+	}
+#endif
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
+	    (inp->sctp_socket->so_qlimit)) {
+		/* The listener can NOT send */
+		SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+		error = ENOTCONN;
+		goto out_unlocked;
+	}
+	/**
+	 * Pre-screen address, if one is given the sin-len
+	 * must be set correctly!
+	 */
+	if (addr) {
+		union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
+		switch (raddr->sa.sa_family) {
+#ifdef INET
+		case AF_INET:
+#ifdef HAVE_SIN_LEN
+			if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
+				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+				error = EINVAL;
+				goto out_unlocked;
+			}
+#endif
+			port = raddr->sin.sin_port;
+			break;
+#endif
+#ifdef INET6
+		case AF_INET6:
+#ifdef HAVE_SIN6_LEN
+			if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
+				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+				error = EINVAL;
+				goto out_unlocked;
+			}
+#endif
+			port = raddr->sin6.sin6_port;
+			break;
+#endif
+#if defined(__Userspace__)
+		case AF_CONN:
+#ifdef HAVE_SCONN_LEN
+			if (raddr->sconn.sconn_len != sizeof(struct sockaddr_conn)) {
+				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+				error = EINVAL;
+				goto out_unlocked;
+			}
+#endif
+			port = raddr->sconn.sconn_port;
+			break;
+#endif
+		default:
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
+			error = EAFNOSUPPORT;
+			goto out_unlocked;
+		}
+	} else
+		port = 0;
+
+	if (srcv) {
+		sinfo_flags = srcv->sinfo_flags;
+		sinfo_assoc_id = srcv->sinfo_assoc_id;
+		if (INVALID_SINFO_FLAG(sinfo_flags) ||
+		    PR_SCTP_INVALID_POLICY(sinfo_flags)) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out_unlocked;
+		}
+		if (srcv->sinfo_flags)
+			SCTP_STAT_INCR(sctps_sends_with_flags);
+	} else {
+		sinfo_flags = inp->def_send.sinfo_flags;
+		sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
+	}
+	if (sinfo_flags & SCTP_SENDALL) {
+		/* its a sendall */
+		error = sctp_sendall(inp, uio, top, srcv);
+		top = NULL;
+		goto out_unlocked;
+	}
+	if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_unlocked;
+	}
+	/* now we must find the assoc */
+	if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
+	    (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
+		SCTP_INP_RLOCK(inp);
+		stcb = LIST_FIRST(&inp->sctp_asoc_list);
+		if (stcb) {
+			SCTP_TCB_LOCK(stcb);
+			hold_tcblock = 1;
+		}
+		SCTP_INP_RUNLOCK(inp);
+	} else if (sinfo_assoc_id) {
+		stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
+		if (stcb != NULL) {
+			hold_tcblock = 1;
+		}
+	} else if (addr) {
+		/*-
+		 * Since we did not use findep we must
+		 * increment it, and if we don't find a tcb
+		 * decrement it.
+		 */
+		SCTP_INP_WLOCK(inp);
+		SCTP_INP_INCR_REF(inp);
+		SCTP_INP_WUNLOCK(inp);
+		stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
+		if (stcb == NULL) {
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		} else {
+			hold_tcblock = 1;
+		}
+	}
+	if ((stcb == NULL) && (addr)) {
+		/* Possible implicit send? */
+		SCTP_ASOC_CREATE_LOCK(inp);
+		create_lock_applied = 1;
+		if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
+		    (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
+			/* Should I really unlock ? */
+			SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out_unlocked;
+
+		}
+		if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
+		    (addr->sa_family == AF_INET6)) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out_unlocked;
+		}
+		SCTP_INP_WLOCK(inp);
+		SCTP_INP_INCR_REF(inp);
+		SCTP_INP_WUNLOCK(inp);
+		/* With the lock applied look again */
+		stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
+		if ((stcb == NULL) && (control != NULL) && (port > 0)) {
+			stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
+		}
+		if (stcb == NULL) {
+			SCTP_INP_WLOCK(inp);
+			SCTP_INP_DECR_REF(inp);
+			SCTP_INP_WUNLOCK(inp);
+		} else {
+			hold_tcblock = 1;
+		}
+		if (error) {
+			goto out_unlocked;
+		}
+		if (t_inp != inp) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
+			error = ENOTCONN;
+			goto out_unlocked;
+		}
+	}
+	if (stcb == NULL) {
+		if (addr == NULL) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
+			error = ENOENT;
+			goto out_unlocked;
+		} else {
+			/* We must go ahead and start the INIT process */
+			uint32_t vrf_id;
+
+			if ((sinfo_flags & SCTP_ABORT) ||
+			    ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
+				/*-
+				 * User asks to abort a non-existant assoc,
+				 * or EOF a non-existant assoc with no data
+				 */
+				SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
+				error = ENOENT;
+				goto out_unlocked;
+			}
+			/* get an asoc/stcb struct */
+			vrf_id = inp->def_vrf_id;
+#ifdef INVARIANTS
+			if (create_lock_applied == 0) {
+				panic("Error, should hold create lock and I don't?");
+			}
+#endif
+			stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
+			                       inp->sctp_ep.pre_open_stream_count,
+			                       inp->sctp_ep.port,
+#if !(defined( __Panda__) || defined(__Userspace__))
+			                       p);
+#else
+			                       (struct proc *)NULL);
+#endif
+			if (stcb == NULL) {
+				/* Error is setup for us in the call */
+				goto out_unlocked;
+			}
+			if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
+				stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
+				/* Set the connected flag so we can queue data */
+				soisconnecting(so);
+			}
+			hold_tcblock = 1;
+			if (create_lock_applied) {
+				SCTP_ASOC_CREATE_UNLOCK(inp);
+				create_lock_applied = 0;
+			} else {
+				SCTP_PRINTF("Huh-3? create lock should have been on??\n");
+			}
+			/* Turn on queue only flag to prevent data from being sent */
+			queue_only = 1;
+			asoc = &stcb->asoc;
+			SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
+			(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
+
+			/* initialize authentication params for the assoc */
+			sctp_initialize_auth_params(inp, stcb);
+
+			if (control) {
+				if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
+					sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
+					                SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
+					hold_tcblock = 0;
+					stcb = NULL;
+					goto out_unlocked;
+				}
+			}
+			/* out with the INIT */
+			queue_only_for_init = 1;
+			/*-
+			 * we may want to dig in after this call and adjust the MTU
+			 * value. It defaulted to 1500 (constant) but the ro
+			 * structure may now have an update and thus we may need to
+			 * change it BEFORE we append the message.
+			 */
+		}
+	} else
+		asoc = &stcb->asoc;
+	if (srcv == NULL)
+		srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
+	if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
+		if (addr)
+			net = sctp_findnet(stcb, addr);
+		else
+			net = NULL;
+		if ((net == NULL) ||
+		    ((port != 0) && (port != stcb->rport))) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out_unlocked;
+		}
+	} else {
+		if (stcb->asoc.alternate) {
+			net = stcb->asoc.alternate;
+		} else {
+			net = stcb->asoc.primary_destination;
+		}
+	}
+	atomic_add_int(&stcb->total_sends, 1);
+	/* Keep the stcb from being freed under our feet */
+	atomic_add_int(&asoc->refcnt, 1);
+	free_cnt_applied = 1;
+
+	if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
+		if (sndlen > asoc->smallest_mtu) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+			error = EMSGSIZE;
+			goto out_unlocked;
+		}
+	}
+#if defined(__Userspace__)
+	if (inp->recv_callback) {
+		non_blocking = 1;
+	}
+#endif
+	if (SCTP_SO_IS_NBIO(so)
+#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
+	     || (flags & MSG_NBIO)
+#endif
+	    ) {
+		non_blocking = 1;
+	}
+	/* would we block? */
+	if (non_blocking) {
+		if (hold_tcblock == 0) {
+			SCTP_TCB_LOCK(stcb);
+			hold_tcblock = 1;
+		}
+		inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+		if ((SCTP_SB_LIMIT_SND(so) <  (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
+		    (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
+			if (sndlen > SCTP_SB_LIMIT_SND(so))
+				error = EMSGSIZE;
+			else
+				error = EWOULDBLOCK;
+			goto out_unlocked;
+		}
+		stcb->asoc.sb_send_resv += sndlen;
+		SCTP_TCB_UNLOCK(stcb);
+		hold_tcblock = 0;
+	} else {
+		atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
+	}
+	local_soresv = sndlen;
+	if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+		SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+		error = ECONNRESET;
+		goto out_unlocked;
+	}
+	if (create_lock_applied) {
+		SCTP_ASOC_CREATE_UNLOCK(inp);
+		create_lock_applied = 0;
+	}
+	/* Is the stream no. valid? */
+	if (srcv->sinfo_stream >= asoc->streamoutcnt) {
+		/* Invalid stream number */
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_unlocked;
+	}
+	if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
+	    (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
+		/*
+		 * Can't queue any data while stream reset is underway.
+		 */
+		if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
+			error = EAGAIN;
+		} else {
+			error = EINVAL;
+		}
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
+		goto out_unlocked;
+	}
+	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
+		queue_only = 1;
+	}
+	/* we are now done with all control */
+	if (control) {
+		sctp_m_freem(control);
+		control = NULL;
+	}
+	if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
+	    (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
+	    (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
+		if (srcv->sinfo_flags & SCTP_ABORT) {
+			;
+		} else {
+			SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+			error = ECONNRESET;
+			goto out_unlocked;
+		}
+	}
+	/* Ok, we will attempt a msgsnd :> */
+#if !(defined(__Panda__) || defined(__Windows__) || defined(__Userspace__))
+	if (p) {
+#if defined(__FreeBSD__) && __FreeBSD_version >= 603000
+		p->td_ru.ru_msgsnd++;
+#elif defined(__FreeBSD__) && __FreeBSD_version >= 500000
+		p->td_proc->p_stats->p_ru.ru_msgsnd++;
+#else
+		p->p_stats->p_ru.ru_msgsnd++;
+#endif
+	}
+#endif
+	/* Are we aborting? */
+	if (srcv->sinfo_flags & SCTP_ABORT) {
+		struct mbuf *mm;
+		int tot_demand, tot_out = 0, max_out;
+
+		SCTP_STAT_INCR(sctps_sends_with_abort);
+		if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
+		    (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
+			/* It has to be up before we abort */
+			/* how big is the user initiated abort? */
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out;
+		}
+		if (hold_tcblock) {
+			SCTP_TCB_UNLOCK(stcb);
+			hold_tcblock = 0;
+		}
+		if (top) {
+			struct mbuf *cntm = NULL;
+
+			mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
+			if (sndlen != 0) {
+				for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
+					tot_out += SCTP_BUF_LEN(cntm);
+				}
+			}
+		} else {
+			/* Must fit in a MTU */
+			tot_out = sndlen;
+			tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
+			if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
+				/* To big */
+				SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+				error = EMSGSIZE;
+				goto out;
+			}
+			mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
+		}
+		if (mm == NULL) {
+			SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
+			error = ENOMEM;
+			goto out;
+		}
+		max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
+		max_out -= sizeof(struct sctp_abort_msg);
+		if (tot_out > max_out) {
+			tot_out = max_out;
+		}
+		if (mm) {
+			struct sctp_paramhdr *ph;
+
+			/* now move forward the data pointer */
+			ph = mtod(mm, struct sctp_paramhdr *);
+			ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
+			ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
+			ph++;
+			SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
+			if (top == NULL) {
+#if defined(__APPLE__)
+				SCTP_SOCKET_UNLOCK(so, 0);
+#endif
+				error = uiomove((caddr_t)ph, (int)tot_out, uio);
+#if defined(__APPLE__)
+				SCTP_SOCKET_LOCK(so, 0);
+#endif
+				if (error) {
+					/*-
+					 * Here if we can't get his data we
+					 * still abort we just don't get to
+					 * send the users note :-0
+					 */
+					sctp_m_freem(mm);
+					mm = NULL;
+				}
+			} else {
+				if (sndlen != 0) {
+					SCTP_BUF_NEXT(mm) = top;
+				}
+			}
+		}
+		if (hold_tcblock == 0) {
+			SCTP_TCB_LOCK(stcb);
+		}
+		atomic_add_int(&stcb->asoc.refcnt, -1);
+		free_cnt_applied = 0;
+		/* release this lock, otherwise we hang on ourselves */
+		sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
+		/* now relock the stcb so everything is sane */
+		hold_tcblock = 0;
+		stcb = NULL;
+		/* In this case top is already chained to mm
+		 * avoid double free, since we free it below if
+		 * top != NULL and driver would free it after sending
+		 * the packet out
+		 */
+		if (sndlen != 0) {
+			top = NULL;
+		}
+		goto out_unlocked;
+	}
+	/* Calculate the maximum we can send */
+	inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+	if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
+		if (non_blocking) {
+			/* we already checked for non-blocking above. */
+			max_len = sndlen;
+		} else {
+			max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
+		}
+	} else {
+		max_len = 0;
+	}
+	if (hold_tcblock) {
+		SCTP_TCB_UNLOCK(stcb);
+		hold_tcblock = 0;
+	}
+	if (asoc->strmout == NULL) {
+		/* huh? software error */
+		SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
+		error = EFAULT;
+		goto out_unlocked;
+	}
+
+	/* Unless E_EOR mode is on, we must make a send FIT in one call. */
+	if ((user_marks_eor == 0) &&
+	    (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
+		/* It will NEVER fit */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
+		error = EMSGSIZE;
+		goto out_unlocked;
+	}
+	if ((uio == NULL) && user_marks_eor) {
+		/*-
+		 * We do not support eeor mode for
+		 * sending with mbuf chains (like sendfile).
+		 */
+		SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+		error = EINVAL;
+		goto out_unlocked;
+	}
+
+	if (user_marks_eor) {
+		local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
+	} else {
+		/*-
+		 * For non-eeor the whole message must fit in
+		 * the socket send buffer.
+		 */
+		local_add_more = sndlen;
+	}
+	len = 0;
+	if (non_blocking) {
+		goto skip_preblock;
+	}
+	if (((max_len <= local_add_more) &&
+	     (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
+	    (max_len == 0) ||
+	    ((stcb->asoc.chunks_on_out_queue+stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+		/* No room right now ! */
+		SOCKBUF_LOCK(&so->so_snd);
+		inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+		while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
+		       ((stcb->asoc.stream_queue_cnt+stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
+			SCTPDBG(SCTP_DEBUG_OUTPUT1,"pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
+			        (unsigned int)SCTP_SB_LIMIT_SND(so),
+			        inqueue_bytes,
+			        local_add_more,
+			        stcb->asoc.stream_queue_cnt,
+			        stcb->asoc.chunks_on_out_queue,
+			        SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+				sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
+			}
+			be.error = 0;
+#if !defined(__Panda__) && !defined(__Windows__)
+			stcb->block_entry = &be;
+#endif
+			error = sbwait(&so->so_snd);
+			stcb->block_entry = NULL;
+			if (error || so->so_error || be.error) {
+				if (error == 0) {
+					if (so->so_error)
+						error = so->so_error;
+					if (be.error) {
+						error = be.error;
+					}
+				}
+				SOCKBUF_UNLOCK(&so->so_snd);
+				goto out_unlocked;
+			}
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+				sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
+				               asoc, stcb->asoc.total_output_queue_size);
+			}
+			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+				SOCKBUF_UNLOCK(&so->so_snd);
+				goto out_unlocked;
+			}
+			inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+		}
+		if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
+			max_len = SCTP_SB_LIMIT_SND(so) -  inqueue_bytes;
+		} else {
+			max_len = 0;
+		}
+		SOCKBUF_UNLOCK(&so->so_snd);
+	}
+
+skip_preblock:
+	if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+		goto out_unlocked;
+	}
+#if defined(__APPLE__)
+	error = sblock(&so->so_snd, SBLOCKWAIT(flags));
+#endif
+	/* sndlen covers for mbuf case
+	 * uio_resid covers for the non-mbuf case
+	 * NOTE: uio will be null when top/mbuf is passed
+	 */
+	if (sndlen == 0) {
+		if (srcv->sinfo_flags & SCTP_EOF) {
+			got_all_of_the_send = 1;
+			goto dataless_eof;
+		} else {
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out;
+		}
+	}
+	if (top == NULL) {
+		struct sctp_stream_queue_pending *sp;
+		struct sctp_stream_out *strm;
+		uint32_t sndout;
+
+		SCTP_TCB_SEND_LOCK(stcb);
+		if ((asoc->stream_locked) &&
+		    (asoc->stream_locked_on  != srcv->sinfo_stream)) {
+			SCTP_TCB_SEND_UNLOCK(stcb);
+			SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
+			error = EINVAL;
+			goto out;
+		}
+		SCTP_TCB_SEND_UNLOCK(stcb);
+
+		strm = &stcb->asoc.strmout[srcv->sinfo_stream];
+		if (strm->last_msg_incomplete == 0) {
+		do_a_copy_in:
+			sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
+			if ((sp == NULL) || (error)) {
+				goto out;
+			}
+			SCTP_TCB_SEND_LOCK(stcb);
+			if (sp->msg_is_complete) {
+				strm->last_msg_incomplete = 0;
+				asoc->stream_locked = 0;
+			} else {
+				/* Just got locked to this guy in
+				 * case of an interrupt.
+				 */
+				strm->last_msg_incomplete = 1;
+				if (stcb->asoc.idata_supported == 0) {
+					asoc->stream_locked = 1;
+					asoc->stream_locked_on  = srcv->sinfo_stream;
+				}
+				sp->sender_all_done = 0;
+			}
+			sctp_snd_sb_alloc(stcb, sp->length);
+			atomic_add_int(&asoc->stream_queue_cnt, 1);
+			if (srcv->sinfo_flags & SCTP_UNORDERED) {
+				SCTP_STAT_INCR(sctps_sends_with_unord);
+			}
+			TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
+			stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
+			SCTP_TCB_SEND_UNLOCK(stcb);
+		} else {
+			SCTP_TCB_SEND_LOCK(stcb);
+			sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
+			SCTP_TCB_SEND_UNLOCK(stcb);
+			if (sp == NULL) {
+				/* ???? Huh ??? last msg is gone */
+#ifdef INVARIANTS
+				panic("Warning: Last msg marked incomplete, yet nothing left?");
+#else
+				SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
+				strm->last_msg_incomplete = 0;
+#endif
+				goto do_a_copy_in;
+
+			}
+		}
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+		while (uio->uio_resid > 0) {
+#else
+		while (uio_resid(uio) > 0) {
+#endif
+#else
+		while (uio->uio_resid > 0) {
+#endif
+			/* How much room do we have? */
+			struct mbuf *new_tail, *mm;
+
+			if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
+				max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
+			else
+				max_len = 0;
+
+			if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
+			    (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+			    (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
+#else
+			    (uio_resid(uio) && (uio_resid(uio) <= (int)max_len))) {
+#endif
+#else
+			    (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
+#endif
+				sndout = 0;
+				new_tail = NULL;
+				if (hold_tcblock) {
+					SCTP_TCB_UNLOCK(stcb);
+					hold_tcblock = 0;
+				}
+#if defined(__APPLE__)
+				SCTP_SOCKET_UNLOCK(so, 0);
+#endif
+#if defined(__FreeBSD__) && __FreeBSD_version > 602000
+				    mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
+#else
+				    mm = sctp_copy_resume(uio, max_len, &error, &sndout, &new_tail);
+#endif
+#if defined(__APPLE__)
+				SCTP_SOCKET_LOCK(so, 0);
+#endif
+				if ((mm == NULL) || error) {
+					if (mm) {
+						sctp_m_freem(mm);
+					}
+					goto out;
+				}
+				/* Update the mbuf and count */
+				SCTP_TCB_SEND_LOCK(stcb);
+				if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+					/* we need to get out.
+					 * Peer probably aborted.
+					 */
+					sctp_m_freem(mm);
+					if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
+						SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
+						error = ECONNRESET;
+					}
+					SCTP_TCB_SEND_UNLOCK(stcb);
+					goto out;
+				}
+				if (sp->tail_mbuf) {
+					/* tack it to the end */
+					SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
+					sp->tail_mbuf = new_tail;
+				} else {
+					/* A stolen mbuf */
+					sp->data = mm;
+					sp->tail_mbuf = new_tail;
+				}
+				sctp_snd_sb_alloc(stcb, sndout);
+				atomic_add_int(&sp->length, sndout);
+				len += sndout;
+				if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
+					sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
+				}
+
+				/* Did we reach EOR? */
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+				if ((uio->uio_resid == 0) &&
+#else
+				if ((uio_resid(uio) == 0) &&
+#endif
+#else
+				if ((uio->uio_resid == 0) &&
+#endif
+				    ((user_marks_eor == 0) ||
+				     (srcv->sinfo_flags & SCTP_EOF) ||
+				     (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
+					sp->msg_is_complete = 1;
+				} else {
+					sp->msg_is_complete = 0;
+				}
+				SCTP_TCB_SEND_UNLOCK(stcb);
+			}
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+			if (uio->uio_resid == 0) {
+#else
+			if (uio_resid(uio) == 0) {
+#endif
+#else
+			if (uio->uio_resid == 0) {
+#endif
+				/* got it all? */
+				continue;
+			}
+			/* PR-SCTP? */
+			if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
+				/* This is ugly but we must assure locking order */
+				if (hold_tcblock == 0) {
+					SCTP_TCB_LOCK(stcb);
+					hold_tcblock = 1;
+				}
+				sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
+				inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
+				if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
+					max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
+				else
+					max_len = 0;
+				if (max_len > 0) {
+					continue;
+				}
+				SCTP_TCB_UNLOCK(stcb);
+				hold_tcblock = 0;
+			}
+			/* wait for space now */
+			if (non_blocking) {
+				/* Non-blocking io in place out */
+				goto skip_out_eof;
+			}
+			/* What about the INIT, send it maybe */
+			if (queue_only_for_init) {
+				if (hold_tcblock == 0) {
+					SCTP_TCB_LOCK(stcb);
+					hold_tcblock = 1;
+				}
+				if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
+					/* a collision took us forward? */
+					queue_only = 0;
+				} else {
+					sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
+					SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
+					queue_only = 1;
+				}
+			}
+			if ((net->flight_size > net->cwnd) &&
+			    (asoc->sctp_cmt_on_off == 0)) {
+				SCTP_STAT_INCR(sctps_send_cwnd_avoid);
+				queue_only = 1;
+			} else if (asoc->ifp_had_enobuf) {
+				SCTP_STAT_INCR(sctps_ifnomemqueued);
+				if (net->flight_size > (2 * net->mtu)) {
+					queue_only = 1;
+				}
+				asoc->ifp_had_enobuf = 0;
+			}
+			un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+			           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+			if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+			    (stcb->asoc.total_flight > 0) &&
+			    (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
+			    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
+
+				/*-
+				 * Ok, Nagle is set on and we have data outstanding.
+				 * Don't send anything and let SACKs drive out the
+				 * data unless we have a "full" segment to send.
+				 */
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+					sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
+				}
+				SCTP_STAT_INCR(sctps_naglequeued);
+				nagle_applies = 1;
+			} else {
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+					if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
+						sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
+				}
+				SCTP_STAT_INCR(sctps_naglesent);
+				nagle_applies = 0;
+			}
+			if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+
+				sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
+					       nagle_applies, un_sent);
+				sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
+					       stcb->asoc.total_flight,
+					       stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
+			}
+			if (queue_only_for_init)
+				queue_only_for_init = 0;
+			if ((queue_only == 0) && (nagle_applies == 0)) {
+				/*-
+				 * need to start chunk output
+				 * before blocking.. note that if
+				 * a lock is already applied, then
+				 * the input via the net is happening
+				 * and I don't need to start output :-D
+				 */
+				if (hold_tcblock == 0) {
+					if (SCTP_TCB_TRYLOCK(stcb)) {
+						hold_tcblock = 1;
+						sctp_chunk_output(inp,
+								  stcb,
+								  SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+					}
+				} else {
+					sctp_chunk_output(inp,
+							  stcb,
+							  SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+				}
+				if (hold_tcblock == 1) {
+					SCTP_TCB_UNLOCK(stcb);
+					hold_tcblock = 0;
+				}
+			}
+			SOCKBUF_LOCK(&so->so_snd);
+			/*-
+			 * This is a bit strange, but I think it will
+			 * work. The total_output_queue_size is locked and
+			 * protected by the TCB_LOCK, which we just released.
+			 * There is a race that can occur between releasing it
+			 * above, and me getting the socket lock, where sacks
+			 * come in but we have not put the SB_WAIT on the
+			 * so_snd buffer to get the wakeup. After the LOCK
+			 * is applied the sack_processing will also need to
+			 * LOCK the so->so_snd to do the actual sowwakeup(). So
+			 * once we have the socket buffer lock if we recheck the
+			 * size we KNOW we will get to sleep safely with the
+			 * wakeup flag in place.
+			 */
+			if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
+						      min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
+						       asoc, uio->uio_resid);
+#else
+					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
+						       asoc, uio_resid(uio));
+#endif
+#else
+					sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
+						       asoc, (size_t)uio->uio_resid);
+#endif
+				}
+				be.error = 0;
+#if !defined(__Panda__) && !defined(__Windows__)
+				stcb->block_entry = &be;
+#endif
+#if defined(__APPLE__)
+				sbunlock(&so->so_snd, 1);
+#endif
+				error = sbwait(&so->so_snd);
+				stcb->block_entry = NULL;
+
+				if (error || so->so_error || be.error) {
+					if (error == 0) {
+						if (so->so_error)
+							error = so->so_error;
+						if (be.error) {
+							error = be.error;
+						}
+					}
+					SOCKBUF_UNLOCK(&so->so_snd);
+					goto out_unlocked;
+				}
+
+#if defined(__APPLE__)
+				error = sblock(&so->so_snd, SBLOCKWAIT(flags));
+#endif
+				if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+					sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
+						       asoc, stcb->asoc.total_output_queue_size);
+				}
+			}
+			SOCKBUF_UNLOCK(&so->so_snd);
+			if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+				goto out_unlocked;
+			}
+		}
+		SCTP_TCB_SEND_LOCK(stcb);
+		if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
+			SCTP_TCB_SEND_UNLOCK(stcb);
+			goto out_unlocked;
+		}
+		if (sp) {
+			if (sp->msg_is_complete == 0) {
+				strm->last_msg_incomplete = 1;
+				if (stcb->asoc.idata_supported == 0) {
+					asoc->stream_locked = 1;
+					asoc->stream_locked_on  = srcv->sinfo_stream;
+				}
+			} else {
+				sp->sender_all_done = 1;
+				strm->last_msg_incomplete = 0;
+				asoc->stream_locked = 0;
+			}
+		} else {
+			SCTP_PRINTF("Huh no sp TSNH?\n");
+			strm->last_msg_incomplete = 0;
+			asoc->stream_locked = 0;
+		}
+		SCTP_TCB_SEND_UNLOCK(stcb);
+#if defined(__APPLE__)
+#if defined(APPLE_LEOPARD)
+		if (uio->uio_resid == 0) {
+#else
+		if (uio_resid(uio) == 0) {
+#endif
+#else
+		if (uio->uio_resid == 0) {
+#endif
+			got_all_of_the_send = 1;
+		}
+	} else {
+		/* We send in a 0, since we do NOT have any locks */
+		error = sctp_msg_append(stcb, net, top, srcv, 0);
+		top = NULL;
+		if (srcv->sinfo_flags & SCTP_EOF) {
+			/*
+			 * This should only happen for Panda for the mbuf
+			 * send case, which does NOT yet support EEOR mode.
+			 * Thus, we can just set this flag to do the proper
+			 * EOF handling.
+			 */
+			got_all_of_the_send = 1;
+		}
+	}
+	if (error) {
+		goto out;
+	}
+dataless_eof:
+	/* EOF thing ? */
+	if ((srcv->sinfo_flags & SCTP_EOF) &&
+	    (got_all_of_the_send == 1)) {
+		SCTP_STAT_INCR(sctps_sends_with_eof);
+		error = 0;
+		if (hold_tcblock == 0) {
+			SCTP_TCB_LOCK(stcb);
+			hold_tcblock = 1;
+		}
+		if (TAILQ_EMPTY(&asoc->send_queue) &&
+		    TAILQ_EMPTY(&asoc->sent_queue) &&
+		    sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
+			if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, asoc)) {
+				goto abort_anyway;
+			}
+			/* there is nothing queued to send, so I'm done... */
+			if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+				struct sctp_nets *netp;
+
+				/* only send SHUTDOWN the first time through */
+				if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
+					SCTP_STAT_DECR_GAUGE32(sctps_currestab);
+				}
+				SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
+				SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
+				sctp_stop_timers_for_shutdown(stcb);
+				if (stcb->asoc.alternate) {
+					netp = stcb->asoc.alternate;
+				} else {
+					netp = stcb->asoc.primary_destination;
+				}
+				sctp_send_shutdown(stcb, netp);
+				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
+				                 netp);
+				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+				                 asoc->primary_destination);
+			}
+		} else {
+			/*-
+			 * we still got (or just got) data to send, so set
+			 * SHUTDOWN_PENDING
+			 */
+			/*-
+			 * XXX sockets draft says that SCTP_EOF should be
+			 * sent with no data.  currently, we will allow user
+			 * data to be sent first and move to
+			 * SHUTDOWN-PENDING
+			 */
+			if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
+			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
+			    (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
+				if (hold_tcblock == 0) {
+					SCTP_TCB_LOCK(stcb);
+					hold_tcblock = 1;
+				}
+				if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, asoc)) {
+					asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
+				}
+				asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
+				if (TAILQ_EMPTY(&asoc->send_queue) &&
+				    TAILQ_EMPTY(&asoc->sent_queue) &&
+				    (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
+					struct mbuf *op_err;
+					char msg[SCTP_DIAG_INFO_LEN];
+
+				abort_anyway:
+					if (free_cnt_applied) {
+						atomic_add_int(&stcb->asoc.refcnt, -1);
+						free_cnt_applied = 0;
+					}
+					snprintf(msg, sizeof(msg),
+					         "%s:%d at %s", __FILE__, __LINE__, __func__);
+					op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
+					                             msg);
+					sctp_abort_an_association(stcb->sctp_ep, stcb,
+					                          op_err, SCTP_SO_LOCKED);
+					/* now relock the stcb so everything is sane */
+					hold_tcblock = 0;
+					stcb = NULL;
+					goto out;
+				}
+				sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
+				                 asoc->primary_destination);
+				sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
+			}
+		}
+	}
+skip_out_eof:
+	if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
+		some_on_control = 1;
+	}
+	if (queue_only_for_init) {
+		if (hold_tcblock == 0) {
+			SCTP_TCB_LOCK(stcb);
+			hold_tcblock = 1;
+		}
+		if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
+			/* a collision took us forward? */
+			queue_only = 0;
+		} else {
+			sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
+			SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
+			queue_only = 1;
+		}
+	}
+	if ((net->flight_size > net->cwnd) &&
+	    (stcb->asoc.sctp_cmt_on_off == 0)) {
+		SCTP_STAT_INCR(sctps_send_cwnd_avoid);
+		queue_only = 1;
+	} else if (asoc->ifp_had_enobuf) {
+		SCTP_STAT_INCR(sctps_ifnomemqueued);
+		if (net->flight_size > (2 * net->mtu)) {
+			queue_only = 1;
+		}
+		asoc->ifp_had_enobuf = 0;
+	}
+	un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
+	           (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
+	if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
+	    (stcb->asoc.total_flight > 0) &&
+	    (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
+	    (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
+		/*-
+		 * Ok, Nagle is set on and we have data outstanding.
+		 * Don't send anything and let SACKs drive out the
+		 * data unless wen have a "full" segment to send.
+		 */
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+			sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
+		}
+		SCTP_STAT_INCR(sctps_naglequeued);
+		nagle_applies = 1;
+	} else {
+		if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
+			if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
+				sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
+		}
+		SCTP_STAT_INCR(sctps_naglesent);
+		nagle_applies = 0;
+	}
+	if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
+		sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
+		               nagle_applies, un_sent);
+		sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
+		               stcb->asoc.total_flight,
+		               stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
+	}
+	if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
+		/* we can attempt to send too. */
+		if (hold_tcblock == 0) {
+			/* If there is activity recv'ing sacks no need to send */
+			if (SCTP_TCB_TRYLOCK(stcb)) {
+				sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+				hold_tcblock = 1;
+			}
+		} else {
+			sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+		}
+	} else if ((queue_only == 0) &&
+	           (stcb->asoc.peers_rwnd == 0) &&
+	           (stcb->asoc.total_flight == 0)) {
+		/* We get to have a probe outstanding */
+		if (hold_tcblock == 0) {
+			hold_tcblock = 1;
+			SCTP_TCB_LOCK(stcb);
+		}
+		sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
+	} else if (some_on_control) {
+		int num_out, reason, frag_point;
+
+		/* Here we do control only */
+		if (hold_tcblock == 0) {
+			hold_tcblock = 1;
+			SCTP_TCB_LOCK(stcb);
+		}
+		frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
+		(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
+		                            &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
+	}
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
+	        queue_only, stcb->asoc.peers_rwnd, un_sent,
+		stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
+	        stcb->asoc.total_output_queue_size, error);
+
+out:
+#if defined(__APPLE__)
+	sbunlock(&so->so_snd, 1);
+#endif
+out_unlocked:
+
+	if (local_soresv && stcb) {
+		atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
+	}
+	if (create_lock_applied) {
+		SCTP_ASOC_CREATE_UNLOCK(inp);
+	}
+	if ((stcb) && hold_tcblock) {
+		SCTP_TCB_UNLOCK(stcb);
+	}
+	if (stcb && free_cnt_applied) {
+		atomic_add_int(&stcb->asoc.refcnt, -1);
+	}
+#ifdef INVARIANTS
+#if defined(__FreeBSD__)
+	if (stcb) {
+		if (mtx_owned(&stcb->tcb_mtx)) {
+			panic("Leaving with tcb mtx owned?");
+		}
+		if (mtx_owned(&stcb->tcb_send_mtx)) {
+			panic("Leaving with tcb send mtx owned?");
+		}
+	}
+#endif
+#endif
+#ifdef __Panda__
+	/*
+	 * Handle the EAGAIN/ENOMEM cases to reattach the pak header
+	 * to particle when pak is passed in, so that caller
+	 * can try again with this pak
+	 *
+	 * NOTE: For other cases, including success case,
+	 * we simply want to return the header back to free
+	 * pool
+	 */
+	if (top) {
+		if ((error == EAGAIN) || (error == ENOMEM)) {
+			SCTP_ATTACH_CHAIN(i_pak, top, sndlen);
+			top = NULL;
+		} else {
+			(void)SCTP_RELEASE_HEADER(i_pak);
+		}
+	} else {
+		/* This is to handle cases when top has
+		 * been reset to NULL but pak might not
+		 * be freed
+		 */
+		if (i_pak) {
+			(void)SCTP_RELEASE_HEADER(i_pak);
+		}
+	}
+#endif
+	if (top) {
+		sctp_m_freem(top);
+	}
+	if (control) {
+		sctp_m_freem(control);
+	}
+	return (error);
+}
+
+
+/*
+ * generate an AUTHentication chunk, if required
+ */
+struct mbuf *
+sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
+    struct sctp_auth_chunk **auth_ret, uint32_t * offset,
+    struct sctp_tcb *stcb, uint8_t chunk)
+{
+	struct mbuf *m_auth;
+	struct sctp_auth_chunk *auth;
+	int chunk_len;
+	struct mbuf *cn;
+
+	if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
+	    (stcb == NULL))
+		return (m);
+
+	if (stcb->asoc.auth_supported == 0) {
+		return (m);
+	}
+	/* does the requested chunk require auth? */
+	if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
+		return (m);
+	}
+	m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
+	if (m_auth == NULL) {
+		/* no mbuf's */
+		return (m);
+	}
+	/* reserve some space if this will be the first mbuf */
+	if (m == NULL)
+		SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
+	/* fill in the AUTH chunk details */
+	auth = mtod(m_auth, struct sctp_auth_chunk *);
+	bzero(auth, sizeof(*auth));
+	auth->ch.chunk_type = SCTP_AUTHENTICATION;
+	auth->ch.chunk_flags = 0;
+	chunk_len = sizeof(*auth) +
+	    sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
+	auth->ch.chunk_length = htons(chunk_len);
+	auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
+	/* key id and hmac digest will be computed and filled in upon send */
+
+	/* save the offset where the auth was inserted into the chain */
+	*offset = 0;
+	for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
+		*offset += SCTP_BUF_LEN(cn);
+	}
+
+	/* update length and return pointer to the auth chunk */
+	SCTP_BUF_LEN(m_auth) = chunk_len;
+	m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
+	if (auth_ret != NULL)
+		*auth_ret = auth;
+
+	return (m);
+}
+
+#if defined(__FreeBSD__)  || defined(__APPLE__)
+#ifdef INET6
+int
+sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
+{
+	struct nd_prefix *pfx = NULL;
+	struct nd_pfxrouter *pfxrtr = NULL;
+	struct sockaddr_in6 gw6;
+
+	if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
+		return (0);
+
+	/* get prefix entry of address */
+#if defined(__FreeBSD__)
+	ND6_RLOCK();
+#endif
+	LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
+		if (pfx->ndpr_stateflags & NDPRF_DETACHED)
+			continue;
+		if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
+		    &src6->sin6_addr, &pfx->ndpr_mask))
+			break;
+	}
+	/* no prefix entry in the prefix list */
+	if (pfx == NULL) {
+#if defined(__FreeBSD__)
+		ND6_RUNLOCK();
+#endif
+		SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
+		return (0);
+	}
+
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
+
+	/* search installed gateway from prefix entry */
+	LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
+		memset(&gw6, 0, sizeof(struct sockaddr_in6));
+		gw6.sin6_family = AF_INET6;
+#ifdef HAVE_SIN6_LEN
+		gw6.sin6_len = sizeof(struct sockaddr_in6);
+#endif
+		memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
+		    sizeof(struct in6_addr));
+		SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
+		SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
+		SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
+		if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
+#if defined(__FreeBSD__)
+			ND6_RUNLOCK();
+#endif
+			SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
+			return (1);
+		}
+	}
+#if defined(__FreeBSD__)
+	ND6_RUNLOCK();
+#endif
+	SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
+	return (0);
+}
+#endif
+
+int
+sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
+{
+#ifdef INET
+	struct sockaddr_in *sin, *mask;
+	struct ifaddr *ifa;
+	struct in_addr srcnetaddr, gwnetaddr;
+
+	if (ro == NULL || ro->ro_rt == NULL ||
+	    sifa->address.sa.sa_family != AF_INET) {
+		return (0);
+	}
+	ifa = (struct ifaddr *)sifa->ifa;
+	mask = (struct sockaddr_in *)(ifa->ifa_netmask);
+	sin = &sifa->address.sin;
+	srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
+
+	sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
+	gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
+	SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
+	SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
+	if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
+		return (1);
+	}
+#endif
+	return (0);
+}
+#elif defined(__Userspace__)
+/* TODO __Userspace__ versions of sctp_vXsrc_match_nexthop(). */
+int
+sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
+{
+    return (0);
+}
+int
+sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
+{
+    return (0);
+}
+
+#endif