diff --git a/usrsctplib/netinet/sctp_os.h b/usrsctplib/netinet/sctp_os.h
new file mode 100755
index 0000000..4888381
--- /dev/null
+++ b/usrsctplib/netinet/sctp_os.h
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 2006-2007, 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_os.h 235828 2012-05-23 11:26:28Z tuexen $");
+#endif
+
+#ifndef _NETINET_SCTP_OS_H_
+#define _NETINET_SCTP_OS_H_
+
+/*
+ * General kernel memory allocation:
+ *  SCTP_MALLOC(element, type, size, name)
+ *  SCTP_FREE(element)
+ * Kernel memory allocation for "soname"- memory must be zeroed.
+ *  SCTP_MALLOC_SONAME(name, type, size)
+ *  SCTP_FREE_SONAME(name)
+ */
+
+/*
+ * Zone(pool) allocation routines: MUST be defined for each OS.
+ *  zone = zone/pool pointer.
+ *  name = string name of the zone/pool.
+ *  size = size of each zone/pool element.
+ *  number = number of elements in zone/pool.
+ *  type = structure type to allocate
+ *
+ * sctp_zone_t
+ * SCTP_ZONE_INIT(zone, name, size, number)
+ * SCTP_ZONE_GET(zone, type)
+ * SCTP_ZONE_FREE(zone, element)
+ * SCTP_ZONE_DESTROY(zone)
+ */
+
+#if defined(__FreeBSD__)
+#include <netinet/sctp_os_bsd.h>
+#else
+#define MODULE_GLOBAL(_B) (_B)
+#endif
+
+#if defined(__Userspace__)
+#include <netinet/sctp_os_userspace.h>
+#endif
+
+#if defined(__APPLE__)
+#include <netinet/sctp_os_macosx.h>
+#endif
+
+#if defined(__Panda__)
+#include <ip/sctp/sctp_os_iox.h>
+#endif
+
+#if defined(__Windows__)
+#include <netinet/sctp_os_windows.h>
+#endif
+
+/* All os's must implement this address gatherer. If
+ * no VRF's exist, then vrf 0 is the only one and all
+ * addresses and ifn's live here.
+ */
+#define SCTP_DEFAULT_VRF 0
+void sctp_init_vrf_list(int vrfid);
+
+#endif