diff --git a/usrsctplib/netinet/sctp_constants.h b/usrsctplib/netinet/sctp_constants.h
new file mode 100755
index 0000000..e275dd9
--- /dev/null
+++ b/usrsctplib/netinet/sctp_constants.h
@@ -0,0 +1,1103 @@
+/*-
+ * 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_constants.h 309682 2016-12-07 19:30:59Z tuexen $");
+#endif
+
+#ifndef _NETINET_SCTP_CONSTANTS_H_
+#define _NETINET_SCTP_CONSTANTS_H_
+
+#if defined(__Userspace_os_Windows)
+extern void getwintimeofday(struct timeval *tv);
+#endif
+
+/* IANA assigned port number for SCTP over UDP encapsulation */
+#define SCTP_OVER_UDP_TUNNELING_PORT 9899
+
+/* Number of packets to get before sack sent by default */
+#define SCTP_DEFAULT_SACK_FREQ 2
+
+/* Address limit - This variable is calculated
+ * based on an 65535 byte max ip packet. We take out 100 bytes
+ * for the cookie, 40 bytes for a v6 header and 32
+ * bytes for the init structure. A second init structure
+ * for the init-ack and then finally a third one for the
+ * imbedded init. This yeilds 100+40+(3 * 32) = 236 bytes.
+ * This leaves 65299 bytes for addresses. We throw out the 299 bytes.
+ * Now whatever we send in the INIT() we need to allow to get back in the
+ * INIT-ACK plus all the values from INIT and INIT-ACK
+ * listed in the cookie. Plus we need some overhead for
+ * maybe copied parameters in the COOKIE. If we
+ * allow 1080 addresses, and each side has 1080 V6 addresses
+ * that will be 21600 bytes. In the INIT-ACK we will
+ * see the INIT-ACK 21600 + 43200 in the cookie. This leaves
+ * about 500 bytes slack for misc things in the cookie.
+ */
+#define SCTP_ADDRESS_LIMIT 1080
+
+/* We need at least 2k of space for us, inits
+ * larger than that lets abort.
+ */
+#define SCTP_LARGEST_INIT_ACCEPTED (65535 - 2048)
+
+/* Largest length of a chunk */
+#define SCTP_MAX_CHUNK_LENGTH 0xffff
+/* Largest length of an error cause */
+#define SCTP_MAX_CAUSE_LENGTH 0xffff
+/* Number of addresses where we just skip the counting */
+#define SCTP_COUNT_LIMIT 40
+
+#define SCTP_ZERO_COPY_TICK_DELAY (((100 * hz) + 999) / 1000)
+#define SCTP_ZERO_COPY_SENDQ_TICK_DELAY (((100 * hz) + 999) / 1000)
+
+/* Number of ticks to delay before running
+ * iterator on an address change.
+ */
+#define SCTP_ADDRESS_TICK_DELAY 2
+
+#define SCTP_VERSION_STRING "KAME-BSD 1.1"
+/* #define SCTP_AUDITING_ENABLED 1 used for debug/auditing */
+#define SCTP_AUDIT_SIZE 256
+
+
+#define SCTP_KTRHEAD_NAME "sctp_iterator"
+#define SCTP_KTHREAD_PAGES 0
+
+#define SCTP_MCORE_NAME "sctp_core_worker"
+
+
+/* If you support Multi-VRF how big to
+ * make the initial array of VRF's to.
+ */
+#define SCTP_DEFAULT_VRF_SIZE 4
+
+/* constants for rto calc */
+#define sctp_align_safe_nocopy 0
+#define sctp_align_unsafe_makecopy 1
+
+/* JRS - Values defined for the HTCP algorithm */
+#define ALPHA_BASE	(1<<7)  /* 1.0 with shift << 7 */
+#define BETA_MIN	(1<<6)  /* 0.5 with shift << 7 */
+#define BETA_MAX	102	/* 0.8 with shift << 7 */
+
+/* Places that CWND log can happen from */
+#define SCTP_CWND_LOG_FROM_FR	1
+#define SCTP_CWND_LOG_FROM_RTX	2
+#define SCTP_CWND_LOG_FROM_BRST	3
+#define SCTP_CWND_LOG_FROM_SS	4
+#define SCTP_CWND_LOG_FROM_CA	5
+#define SCTP_CWND_LOG_FROM_SAT	6
+#define SCTP_BLOCK_LOG_INTO_BLK 7
+#define SCTP_BLOCK_LOG_OUTOF_BLK 8
+#define SCTP_BLOCK_LOG_CHECK     9
+#define SCTP_STR_LOG_FROM_INTO_STRD 10
+#define SCTP_STR_LOG_FROM_IMMED_DEL 11
+#define SCTP_STR_LOG_FROM_INSERT_HD 12
+#define SCTP_STR_LOG_FROM_INSERT_MD 13
+#define SCTP_STR_LOG_FROM_INSERT_TL 14
+#define SCTP_STR_LOG_FROM_MARK_TSN  15
+#define SCTP_STR_LOG_FROM_EXPRS_DEL 16
+#define SCTP_FR_LOG_BIGGEST_TSNS    17
+#define SCTP_FR_LOG_STRIKE_TEST     18
+#define SCTP_FR_LOG_STRIKE_CHUNK    19
+#define SCTP_FR_T3_TIMEOUT          20
+#define SCTP_MAP_PREPARE_SLIDE      21
+#define SCTP_MAP_SLIDE_FROM         22
+#define SCTP_MAP_SLIDE_RESULT       23
+#define SCTP_MAP_SLIDE_CLEARED	    24
+#define SCTP_MAP_SLIDE_NONE         25
+#define SCTP_FR_T3_MARK_TIME        26
+#define SCTP_FR_T3_MARKED           27
+#define SCTP_FR_T3_STOPPED          28
+#define SCTP_FR_MARKED              30
+#define SCTP_CWND_LOG_NOADV_SS      31
+#define SCTP_CWND_LOG_NOADV_CA      32
+#define SCTP_MAX_BURST_APPLIED      33
+#define SCTP_MAX_IFP_APPLIED        34
+#define SCTP_MAX_BURST_ERROR_STOP   35
+#define SCTP_INCREASE_PEER_RWND     36
+#define SCTP_DECREASE_PEER_RWND     37
+#define SCTP_SET_PEER_RWND_VIA_SACK 38
+#define SCTP_LOG_MBCNT_INCREASE     39
+#define SCTP_LOG_MBCNT_DECREASE     40
+#define SCTP_LOG_MBCNT_CHKSET       41
+#define SCTP_LOG_NEW_SACK           42
+#define SCTP_LOG_TSN_ACKED          43
+#define SCTP_LOG_TSN_REVOKED        44
+#define SCTP_LOG_LOCK_TCB           45
+#define SCTP_LOG_LOCK_INP           46
+#define SCTP_LOG_LOCK_SOCK          47
+#define SCTP_LOG_LOCK_SOCKBUF_R     48
+#define SCTP_LOG_LOCK_SOCKBUF_S     49
+#define SCTP_LOG_LOCK_CREATE        50
+#define SCTP_LOG_INITIAL_RTT        51
+#define SCTP_LOG_RTTVAR             52
+#define SCTP_LOG_SBALLOC            53
+#define SCTP_LOG_SBFREE             54
+#define SCTP_LOG_SBRESULT           55
+#define SCTP_FR_DUPED               56
+#define SCTP_FR_MARKED_EARLY        57
+#define SCTP_FR_CWND_REPORT         58
+#define SCTP_FR_CWND_REPORT_START   59
+#define SCTP_FR_CWND_REPORT_STOP    60
+#define SCTP_CWND_LOG_FROM_SEND     61
+#define SCTP_CWND_INITIALIZATION    62
+#define SCTP_CWND_LOG_FROM_T3       63
+#define SCTP_CWND_LOG_FROM_SACK     64
+#define SCTP_CWND_LOG_NO_CUMACK     65
+#define SCTP_CWND_LOG_FROM_RESEND   66
+#define SCTP_FR_LOG_CHECK_STRIKE    67
+#define SCTP_SEND_NOW_COMPLETES     68
+#define SCTP_CWND_LOG_FILL_OUTQ_CALLED 69
+#define SCTP_CWND_LOG_FILL_OUTQ_FILLS  70
+#define SCTP_LOG_FREE_SENT             71
+#define SCTP_NAGLE_APPLIED          72
+#define SCTP_NAGLE_SKIPPED          73
+#define SCTP_WAKESND_FROM_SACK      74
+#define SCTP_WAKESND_FROM_FWDTSN    75
+#define SCTP_NOWAKE_FROM_SACK       76
+#define SCTP_CWNDLOG_PRESEND        77
+#define SCTP_CWNDLOG_ENDSEND        78
+#define SCTP_AT_END_OF_SACK         79
+#define SCTP_REASON_FOR_SC          80
+#define SCTP_BLOCK_LOG_INTO_BLKA    81
+#define SCTP_ENTER_USER_RECV        82
+#define SCTP_USER_RECV_SACKS        83
+#define SCTP_SORECV_BLOCKSA         84
+#define SCTP_SORECV_BLOCKSB         85
+#define SCTP_SORECV_DONE            86
+#define SCTP_SACK_RWND_UPDATE       87
+#define SCTP_SORECV_ENTER           88
+#define SCTP_SORECV_ENTERPL         89
+#define SCTP_MBUF_INPUT             90
+#define SCTP_MBUF_IALLOC            91
+#define SCTP_MBUF_IFREE             92
+#define SCTP_MBUF_ICOPY             93
+#define SCTP_MBUF_SPLIT             94
+#define SCTP_SORCV_FREECTL          95
+#define SCTP_SORCV_DOESCPY          96
+#define SCTP_SORCV_DOESLCK          97
+#define SCTP_SORCV_DOESADJ          98
+#define SCTP_SORCV_BOTWHILE         99
+#define SCTP_SORCV_PASSBF          100
+#define SCTP_SORCV_ADJD            101
+#define SCTP_UNKNOWN_MAX           102
+#define SCTP_RANDY_STUFF           103
+#define SCTP_RANDY_STUFF1          104
+#define SCTP_STRMOUT_LOG_ASSIGN	   105
+#define SCTP_STRMOUT_LOG_SEND	   106
+#define SCTP_FLIGHT_LOG_DOWN_CA    107
+#define SCTP_FLIGHT_LOG_UP         108
+#define SCTP_FLIGHT_LOG_DOWN_GAP   109
+#define SCTP_FLIGHT_LOG_DOWN_RSND  110
+#define SCTP_FLIGHT_LOG_UP_RSND    111
+#define SCTP_FLIGHT_LOG_DOWN_RSND_TO    112
+#define SCTP_FLIGHT_LOG_DOWN_WP    113
+#define SCTP_FLIGHT_LOG_UP_REVOKE  114
+#define SCTP_FLIGHT_LOG_DOWN_PDRP  115
+#define SCTP_FLIGHT_LOG_DOWN_PMTU  116
+#define SCTP_SACK_LOG_NORMAL	   117
+#define SCTP_SACK_LOG_EXPRESS	   118
+#define SCTP_MAP_TSN_ENTERS        119
+#define SCTP_THRESHOLD_CLEAR       120
+#define SCTP_THRESHOLD_INCR        121
+#define SCTP_FLIGHT_LOG_DWN_WP_FWD 122
+#define SCTP_FWD_TSN_CHECK         123
+#define SCTP_LOG_MAX_TYPES 124
+/*
+ * To turn on various logging, you must first enable 'options KTR' and
+ * you might want to bump the entires 'options KTR_ENTRIES=80000'.
+ * To get something to log you define one of the logging defines.
+ * (see LINT).
+ *
+ * This gets the compile in place, but you still need to turn the
+ * logging flag on too in the sysctl (see in sctp.h).
+ */
+
+#define SCTP_LOG_EVENT_UNKNOWN 0
+#define SCTP_LOG_EVENT_CWND  1
+#define SCTP_LOG_EVENT_BLOCK 2
+#define SCTP_LOG_EVENT_STRM  3
+#define SCTP_LOG_EVENT_FR    4
+#define SCTP_LOG_EVENT_MAP   5
+#define SCTP_LOG_EVENT_MAXBURST 6
+#define SCTP_LOG_EVENT_RWND  7
+#define SCTP_LOG_EVENT_MBCNT 8
+#define SCTP_LOG_EVENT_SACK  9
+#define SCTP_LOG_LOCK_EVENT 10
+#define SCTP_LOG_EVENT_RTT  11
+#define SCTP_LOG_EVENT_SB   12
+#define SCTP_LOG_EVENT_NAGLE 13
+#define SCTP_LOG_EVENT_WAKE 14
+#define SCTP_LOG_MISC_EVENT 15
+#define SCTP_LOG_EVENT_CLOSE 16
+#define SCTP_LOG_EVENT_MBUF 17
+#define SCTP_LOG_CHUNK_PROC 18
+#define SCTP_LOG_ERROR_RET  19
+
+#define SCTP_LOG_MAX_EVENT 20
+
+#define SCTP_LOCK_UNKNOWN 2
+
+
+/* number of associations by default for zone allocation */
+#define SCTP_MAX_NUM_OF_ASOC	40000
+/* how many addresses per assoc remote and local */
+#define SCTP_SCALE_FOR_ADDR	2
+
+/* default MULTIPLE_ASCONF mode enable(1)/disable(0) value (sysctl) */
+#define SCTP_DEFAULT_MULTIPLE_ASCONFS	0
+
+/*
+ * Threshold for rwnd updates, we have to read (sb_hiwat >>
+ * SCTP_RWND_HIWAT_SHIFT) before we will look to see if we need to send a
+ * window update sack. When we look, we compare the last rwnd we sent vs the
+ * current rwnd. It too must be greater than this value. Using 3 divdes the
+ * hiwat by 8, so for 200k rwnd we need to read 24k. For a 64k rwnd we need
+ * to read 8k. This seems about right.. I hope :-D.. we do set a
+ * min of a MTU on it so if the rwnd is real small we will insist
+ * on a full MTU of 1500 bytes.
+ */
+#define SCTP_RWND_HIWAT_SHIFT 3
+
+/* How much of the rwnd must the
+ * message be taking up to start partial delivery.
+ * We calculate this by shifing the hi_water (recv_win)
+ * left the following .. set to 1, when a message holds
+ * 1/2 the rwnd. If we set it to 2 when a message holds
+ * 1/4 the rwnd...etc..
+ */
+
+#define SCTP_PARTIAL_DELIVERY_SHIFT 1
+
+/*
+ * default HMAC for cookies, etc... use one of the AUTH HMAC id's
+ * SCTP_HMAC is the HMAC_ID to use
+ * SCTP_SIGNATURE_SIZE is the digest length
+ */
+#define SCTP_HMAC		SCTP_AUTH_HMAC_ID_SHA1
+#define SCTP_SIGNATURE_SIZE	SCTP_AUTH_DIGEST_LEN_SHA1
+#define SCTP_SIGNATURE_ALOC_SIZE SCTP_SIGNATURE_SIZE
+
+/*
+ * the SCTP protocol signature this includes the version number encoded in
+ * the last 4 bits of the signature.
+ */
+#define PROTO_SIGNATURE_A	0x30000000
+#define SCTP_VERSION_NUMBER	0x3
+
+#define MAX_TSN	0xffffffff
+
+/* how many executions every N tick's */
+#define SCTP_ITERATOR_MAX_AT_ONCE 20
+
+/* number of clock ticks between iterator executions */
+#define SCTP_ITERATOR_TICKS 1
+
+/*
+ * option: If you comment out the following you will receive the old behavior
+ * of obeying cwnd for the fast retransmit algorithm. With this defined a FR
+ * happens right away with-out waiting for the flightsize to drop below the
+ * cwnd value (which is reduced by the FR to 1/2 the inflight packets).
+ */
+#define SCTP_IGNORE_CWND_ON_FR 1
+
+/*
+ * Adds implementors guide behavior to only use newest highest update in SACK
+ * gap ack's to figure out if you need to stroke a chunk for FR.
+ */
+#define SCTP_NO_FR_UNLESS_SEGMENT_SMALLER 1
+
+/* default max I can burst out after a fast retransmit, 0 disables it */
+#define SCTP_DEF_MAX_BURST 4
+#define SCTP_DEF_HBMAX_BURST 4
+#define SCTP_DEF_FRMAX_BURST 4
+
+/* RTO calculation flag to say if it
+ * is safe to determine local lan or not.
+ */
+#define SCTP_RTT_FROM_NON_DATA 0
+#define SCTP_RTT_FROM_DATA     1
+
+#define PR_SCTP_UNORDERED_FLAG 0x0001
+
+/* IP hdr (20/40) + 12+2+2 (enet) + sctp common 12 */
+#define SCTP_FIRST_MBUF_RESV 68
+/* Packet transmit states in the sent field */
+#define SCTP_DATAGRAM_UNSENT		0
+#define SCTP_DATAGRAM_SENT		1
+#define SCTP_DATAGRAM_RESEND1		2	/* not used (in code, but may
+						 * hit this value) */
+#define SCTP_DATAGRAM_RESEND2		3	/* not used (in code, but may
+						 * hit this value) */
+#define SCTP_DATAGRAM_RESEND		4
+#define SCTP_DATAGRAM_ACKED		10010
+#define SCTP_DATAGRAM_MARKED		20010
+#define SCTP_FORWARD_TSN_SKIP		30010
+#define SCTP_DATAGRAM_NR_ACKED		40010
+
+/* chunk output send from locations */
+#define SCTP_OUTPUT_FROM_USR_SEND       0
+#define SCTP_OUTPUT_FROM_T3       	1
+#define SCTP_OUTPUT_FROM_INPUT_ERROR    2
+#define SCTP_OUTPUT_FROM_CONTROL_PROC   3
+#define SCTP_OUTPUT_FROM_SACK_TMR       4
+#define SCTP_OUTPUT_FROM_SHUT_TMR       5
+#define SCTP_OUTPUT_FROM_HB_TMR         6
+#define SCTP_OUTPUT_FROM_SHUT_ACK_TMR   7
+#define SCTP_OUTPUT_FROM_ASCONF_TMR     8
+#define SCTP_OUTPUT_FROM_STRRST_TMR     9
+#define SCTP_OUTPUT_FROM_AUTOCLOSE_TMR  10
+#define SCTP_OUTPUT_FROM_EARLY_FR_TMR   11
+#define SCTP_OUTPUT_FROM_STRRST_REQ     12
+#define SCTP_OUTPUT_FROM_USR_RCVD       13
+#define SCTP_OUTPUT_FROM_COOKIE_ACK     14
+#define SCTP_OUTPUT_FROM_DRAIN          15
+#define SCTP_OUTPUT_FROM_CLOSING        16
+#define SCTP_OUTPUT_FROM_SOCKOPT        17
+
+/* SCTP chunk types are moved sctp.h for application (NAT, FW) use */
+
+/* align to 32-bit sizes */
+#define SCTP_SIZE32(x)	((((x) + 3) >> 2) << 2)
+
+#define IS_SCTP_CONTROL(a) (((a)->chunk_type != SCTP_DATA) && ((a)->chunk_type != SCTP_IDATA))
+#define IS_SCTP_DATA(a) (((a)->chunk_type == SCTP_DATA) || ((a)->chunk_type == SCTP_IDATA))
+
+
+/* SCTP parameter types */
+/*************0x0000 series*************/
+#define SCTP_HEARTBEAT_INFO		0x0001
+#if defined(__Userspace__)
+#define SCTP_CONN_ADDRESS               0x0004
+#endif
+#define SCTP_IPV4_ADDRESS		0x0005
+#define SCTP_IPV6_ADDRESS		0x0006
+#define SCTP_STATE_COOKIE		0x0007
+#define SCTP_UNRECOG_PARAM		0x0008
+#define SCTP_COOKIE_PRESERVE		0x0009
+#define SCTP_HOSTNAME_ADDRESS		0x000b
+#define SCTP_SUPPORTED_ADDRTYPE		0x000c
+
+/* draft-ietf-stewart-tsvwg-strreset-xxx */
+#define SCTP_STR_RESET_OUT_REQUEST	0x000d
+#define SCTP_STR_RESET_IN_REQUEST	0x000e
+#define SCTP_STR_RESET_TSN_REQUEST	0x000f
+#define SCTP_STR_RESET_RESPONSE		0x0010
+#define SCTP_STR_RESET_ADD_OUT_STREAMS	0x0011
+#define SCTP_STR_RESET_ADD_IN_STREAMS   0x0012
+
+#define SCTP_MAX_RESET_PARAMS 2
+#define SCTP_STREAM_RESET_TSN_DELTA    0x1000
+
+/*************0x4000 series*************/
+
+/*************0x8000 series*************/
+#define SCTP_ECN_CAPABLE		0x8000
+
+/* draft-ietf-tsvwg-auth-xxx */
+#define SCTP_RANDOM			0x8002
+#define SCTP_CHUNK_LIST			0x8003
+#define SCTP_HMAC_LIST			0x8004
+/*
+ * draft-ietf-tsvwg-addip-sctp-xx param=0x8008  len=0xNNNN Byte | Byte | Byte
+ * | Byte Byte | Byte ...
+ *
+ * Where each byte is a chunk type extension supported. For example, to support
+ * all chunks one would have (in hex):
+ *
+ * 80 01 00 09 C0 C1 80 81 82 00 00 00
+ *
+ * Has the parameter. C0 = PR-SCTP    (RFC3758) C1, 80 = ASCONF (addip draft) 81
+ * = Packet Drop 82 = Stream Reset 83 = Authentication
+ */
+#define SCTP_SUPPORTED_CHUNK_EXT    0x8008
+
+/*************0xC000 series*************/
+#define SCTP_PRSCTP_SUPPORTED		0xc000
+/* draft-ietf-tsvwg-addip-sctp */
+#define SCTP_ADD_IP_ADDRESS		0xc001
+#define SCTP_DEL_IP_ADDRESS		0xc002
+#define SCTP_ERROR_CAUSE_IND		0xc003
+#define SCTP_SET_PRIM_ADDR		0xc004
+#define SCTP_SUCCESS_REPORT		0xc005
+#define SCTP_ULP_ADAPTATION		0xc006
+/* behave-nat-draft */
+#define SCTP_HAS_NAT_SUPPORT            0xc007
+#define SCTP_NAT_VTAGS                  0xc008
+
+/* bits for TOS field */
+#define SCTP_ECT0_BIT		0x02
+#define SCTP_ECT1_BIT		0x01
+#define SCTP_CE_BITS		0x03
+
+/* below turns off above */
+#define SCTP_FLEXIBLE_ADDRESS	0x20
+#define SCTP_NO_HEARTBEAT	0x40
+
+/* mask to get sticky */
+#define SCTP_STICKY_OPTIONS_MASK	0x0c
+
+
+/*
+ * SCTP states for internal state machine
+ */
+#define SCTP_STATE_EMPTY		0x0000
+#define SCTP_STATE_INUSE		0x0001
+#define SCTP_STATE_COOKIE_WAIT		0x0002
+#define SCTP_STATE_COOKIE_ECHOED	0x0004
+#define SCTP_STATE_OPEN			0x0008
+#define SCTP_STATE_SHUTDOWN_SENT	0x0010
+#define SCTP_STATE_SHUTDOWN_RECEIVED	0x0020
+#define SCTP_STATE_SHUTDOWN_ACK_SENT	0x0040
+#define SCTP_STATE_SHUTDOWN_PENDING	0x0080
+#define SCTP_STATE_CLOSED_SOCKET	0x0100
+#define SCTP_STATE_ABOUT_TO_BE_FREED    0x0200
+#define SCTP_STATE_PARTIAL_MSG_LEFT     0x0400
+#define SCTP_STATE_WAS_ABORTED          0x0800
+#define SCTP_STATE_IN_ACCEPT_QUEUE      0x1000
+#define SCTP_STATE_MASK			0x007f
+
+#define SCTP_GET_STATE(asoc)	((asoc)->state & SCTP_STATE_MASK)
+#define SCTP_SET_STATE(asoc, newstate)  ((asoc)->state = ((asoc)->state & ~SCTP_STATE_MASK) |  newstate)
+#define SCTP_CLEAR_SUBSTATE(asoc, substate) ((asoc)->state &= ~substate)
+#define SCTP_ADD_SUBSTATE(asoc, substate) ((asoc)->state |= substate)
+
+/* SCTP reachability state for each address */
+#define SCTP_ADDR_REACHABLE		0x001
+#define SCTP_ADDR_NO_PMTUD              0x002
+#define SCTP_ADDR_NOHB			0x004
+#define SCTP_ADDR_BEING_DELETED		0x008
+#define SCTP_ADDR_NOT_IN_ASSOC		0x010
+#define SCTP_ADDR_OUT_OF_SCOPE		0x080
+#define SCTP_ADDR_UNCONFIRMED		0x200
+#define SCTP_ADDR_REQ_PRIMARY           0x400
+/* JRS 5/13/07 - Added potentially failed state for CMT PF */
+#define SCTP_ADDR_PF                    0x800
+
+/* bound address types (e.g. valid address types to allow) */
+#define SCTP_BOUND_V6		0x01
+#define SCTP_BOUND_V4		0x02
+
+/*
+ * what is the default number of mbufs in a chain I allow before switching to
+ * a cluster
+ */
+#define SCTP_DEFAULT_MBUFS_IN_CHAIN 5
+
+/* How long a cookie lives in milli-seconds */
+#define SCTP_DEFAULT_COOKIE_LIFE	60000
+
+/* Maximum the mapping array will  grow to (TSN mapping array) */
+#define SCTP_MAPPING_ARRAY	512
+
+/* size of the initial malloc on the mapping array */
+#define SCTP_INITIAL_MAPPING_ARRAY  16
+/* how much we grow the mapping array each call */
+#define SCTP_MAPPING_ARRAY_INCR     32
+
+/*
+ * Here we define the timer types used by the implementation as arguments in
+ * the set/get timer type calls.
+ */
+#define SCTP_TIMER_INIT 	0
+#define SCTP_TIMER_RECV 	1
+#define SCTP_TIMER_SEND 	2
+#define SCTP_TIMER_HEARTBEAT	3
+#define SCTP_TIMER_PMTU		4
+#define SCTP_TIMER_MAXSHUTDOWN	5
+#define SCTP_TIMER_SIGNATURE	6
+/*
+ * number of timer types in the base SCTP structure used in the set/get and
+ * has the base default.
+ */
+#define SCTP_NUM_TMRS	7
+
+/* timer types */
+#define SCTP_TIMER_TYPE_NONE		0
+#define SCTP_TIMER_TYPE_SEND		1
+#define SCTP_TIMER_TYPE_INIT		2
+#define SCTP_TIMER_TYPE_RECV		3
+#define SCTP_TIMER_TYPE_SHUTDOWN	4
+#define SCTP_TIMER_TYPE_HEARTBEAT	5
+#define SCTP_TIMER_TYPE_COOKIE		6
+#define SCTP_TIMER_TYPE_NEWCOOKIE	7
+#define SCTP_TIMER_TYPE_PATHMTURAISE	8
+#define SCTP_TIMER_TYPE_SHUTDOWNACK	9
+#define SCTP_TIMER_TYPE_ASCONF		10
+#define SCTP_TIMER_TYPE_SHUTDOWNGUARD	11
+#define SCTP_TIMER_TYPE_AUTOCLOSE	12
+#define SCTP_TIMER_TYPE_EVENTWAKE	13
+#define SCTP_TIMER_TYPE_STRRESET        14
+#define SCTP_TIMER_TYPE_INPKILL         15
+#define SCTP_TIMER_TYPE_ASOCKILL        16
+#define SCTP_TIMER_TYPE_ADDR_WQ         17
+#define SCTP_TIMER_TYPE_ZERO_COPY       18
+#define SCTP_TIMER_TYPE_ZCOPY_SENDQ     19
+#define SCTP_TIMER_TYPE_PRIM_DELETED    20
+/* add new timers here - and increment LAST */
+#define SCTP_TIMER_TYPE_LAST            21
+
+#define SCTP_IS_TIMER_TYPE_VALID(t)	(((t) > SCTP_TIMER_TYPE_NONE) && \
+					 ((t) < SCTP_TIMER_TYPE_LAST))
+
+
+#if defined(__APPLE__)
+/* Number of ticks to run the main timer at in msec */
+#define SCTP_MAIN_TIMER_DEFAULT		10
+#endif
+
+/* max number of TSN's dup'd that I will hold */
+#define SCTP_MAX_DUP_TSNS	20
+
+/*
+ * Here we define the types used when setting the retry amounts.
+ */
+/* How many drop re-attempts we make on  INIT/COOKIE-ECHO */
+#define SCTP_RETRY_DROPPED_THRESH 4
+
+/*
+ * Maxmium number of chunks a single association can have on it. Note that
+ * this is a squishy number since the count can run over this if the user
+ * sends a large message down .. the fragmented chunks don't count until
+ * AFTER the message is on queue.. it would be the next send that blocks
+ * things. This number will get tuned up at boot in the sctp_init and use the
+ * number of clusters as a base. This way high bandwidth environments will
+ * not get impacted by the lower bandwidth sending a bunch of 1 byte chunks
+ */
+#ifdef __Panda__
+#define SCTP_ASOC_MAX_CHUNKS_ON_QUEUE 10240
+#else
+#define SCTP_ASOC_MAX_CHUNKS_ON_QUEUE 512
+#endif
+
+
+/* The conversion from time to ticks and vice versa is done by rounding
+ * upwards. This way we can test in the code the time to be positive and
+ * know that this corresponds to a positive number of ticks.
+ */
+#define MSEC_TO_TICKS(x) ((hz == 1000) ? x : ((((x) * hz) + 999) / 1000))
+#define TICKS_TO_MSEC(x) ((hz == 1000) ? x : ((((x) * 1000) + (hz - 1)) / hz))
+
+#define SEC_TO_TICKS(x) ((x) * hz)
+#define TICKS_TO_SEC(x) (((x) + (hz - 1)) / hz)
+
+/*
+ * Basically the minimum amount of time before I do a early FR. Making this
+ * value to low will cause duplicate retransmissions.
+ */
+#define SCTP_MINFR_MSEC_TIMER 250
+/* The floor this value is allowed to fall to when starting a timer. */
+#define SCTP_MINFR_MSEC_FLOOR 20
+
+/* init timer def = 1 sec */
+#define SCTP_INIT_SEC	1
+
+/* send timer def = 1 seconds */
+#define SCTP_SEND_SEC	1
+
+/* recv timer def = 200ms  */
+#define SCTP_RECV_MSEC	200
+
+/* 30 seconds + RTO (in ms) */
+#define SCTP_HB_DEFAULT_MSEC	30000
+
+/*
+ * This is how long a secret lives, NOT how long a cookie lives how many
+ * ticks the current secret will live.
+ */
+#define SCTP_DEFAULT_SECRET_LIFE_SEC 3600
+
+#define SCTP_RTO_UPPER_BOUND	(60000)	/* 60 sec in ms */
+#define SCTP_RTO_LOWER_BOUND	(1000)	/* 1 sec is ms */
+#define SCTP_RTO_INITIAL	(3000)	/* 3 sec in ms */
+
+
+#define SCTP_INP_KILL_TIMEOUT 20	/* number of ms to retry kill of inpcb */
+#define SCTP_ASOC_KILL_TIMEOUT 10	/* number of ms to retry kill of inpcb */
+
+#define SCTP_DEF_MAX_INIT		8
+#define SCTP_DEF_MAX_SEND		10
+#define SCTP_DEF_MAX_PATH_RTX		5
+#define SCTP_DEF_PATH_PF_THRESHOLD	SCTP_DEF_MAX_PATH_RTX
+
+#define SCTP_DEF_PMTU_RAISE_SEC	600	/* 10 min between raise attempts */
+
+
+/* How many streams I request initially by default */
+#define SCTP_OSTREAM_INITIAL 10
+#define SCTP_ISTREAM_INITIAL 2048
+
+/*
+ * How many smallest_mtu's need to increase before a window update sack is
+ * sent (should be a power of 2).
+ */
+/* Send window update (incr * this > hiwat). Should be a power of 2 */
+#define SCTP_MINIMAL_RWND		(4096)	/* minimal rwnd */
+
+#define SCTP_ADDRMAX		16
+
+/* SCTP DEBUG Switch parameters */
+#define SCTP_DEBUG_TIMER1	0x00000001
+#define SCTP_DEBUG_TIMER2	0x00000002	/* unused */
+#define SCTP_DEBUG_TIMER3	0x00000004	/* unused */
+#define SCTP_DEBUG_TIMER4	0x00000008
+#define SCTP_DEBUG_OUTPUT1	0x00000010
+#define SCTP_DEBUG_OUTPUT2	0x00000020
+#define SCTP_DEBUG_OUTPUT3	0x00000040
+#define SCTP_DEBUG_OUTPUT4	0x00000080
+#define SCTP_DEBUG_UTIL1	0x00000100
+#define SCTP_DEBUG_UTIL2	0x00000200	/* unused */
+#define SCTP_DEBUG_AUTH1	0x00000400
+#define SCTP_DEBUG_AUTH2	0x00000800	/* unused */
+#define SCTP_DEBUG_INPUT1	0x00001000
+#define SCTP_DEBUG_INPUT2	0x00002000
+#define SCTP_DEBUG_INPUT3	0x00004000
+#define SCTP_DEBUG_INPUT4	0x00008000	/* unused */
+#define SCTP_DEBUG_ASCONF1	0x00010000
+#define SCTP_DEBUG_ASCONF2	0x00020000
+#define SCTP_DEBUG_OUTPUT5	0x00040000	/* unused */
+#define SCTP_DEBUG_XXX		0x00080000	/* unused */
+#define SCTP_DEBUG_PCB1		0x00100000
+#define SCTP_DEBUG_PCB2		0x00200000	/* unused */
+#define SCTP_DEBUG_PCB3		0x00400000
+#define SCTP_DEBUG_PCB4		0x00800000
+#define SCTP_DEBUG_INDATA1	0x01000000
+#define SCTP_DEBUG_INDATA2	0x02000000	/* unused */
+#define SCTP_DEBUG_INDATA3	0x04000000	/* unused */
+#define SCTP_DEBUG_CRCOFFLOAD	0x08000000	/* unused */
+#define SCTP_DEBUG_USRREQ1	0x10000000	/* unused */
+#define SCTP_DEBUG_USRREQ2	0x20000000	/* unused */
+#define SCTP_DEBUG_PEEL1	0x40000000
+#if defined(__Userspace__)
+#define SCTP_DEBUG_USR 		0x80000000
+#else
+#define SCTP_DEBUG_XXXXX	0x80000000	/* unused */
+#endif
+#define SCTP_DEBUG_ALL		0x7ff3ffff
+#define SCTP_DEBUG_NOISY	0x00040000
+
+/* What sender needs to see to avoid SWS or we consider peers rwnd 0 */
+#define SCTP_SWS_SENDER_DEF	1420
+
+/*
+ * SWS is scaled to the sb_hiwat of the socket. A value of 2 is hiwat/4, 1
+ * would be hiwat/2 etc.
+ */
+/* What receiver needs to see in sockbuf or we tell peer its 1 */
+#define SCTP_SWS_RECEIVER_DEF	3000
+
+#define SCTP_INITIAL_CWND 4380
+
+#define SCTP_DEFAULT_MTU 1500 /* emergency default MTU */
+/* amount peer is obligated to have in rwnd or I will abort */
+#define SCTP_MIN_RWND	1500
+
+#define SCTP_DEFAULT_MAXSEGMENT 65535
+
+#define SCTP_CHUNK_BUFFER_SIZE	512
+#define SCTP_PARAM_BUFFER_SIZE	512
+
+/* small chunk store for looking at chunk_list in auth */
+#define SCTP_SMALL_CHUNK_STORE 260
+
+#define SCTP_HOW_MANY_SECRETS	2	/* how many secrets I keep */
+
+#define SCTP_NUMBER_OF_SECRETS	8	/* or 8 * 4 = 32 octets */
+#define SCTP_SECRET_SIZE	32	/* number of octets in a 256 bits */
+
+
+/*
+ * SCTP upper layer notifications
+ */
+#define SCTP_NOTIFY_ASSOC_UP                     1
+#define SCTP_NOTIFY_ASSOC_DOWN                   2
+#define SCTP_NOTIFY_INTERFACE_DOWN               3
+#define SCTP_NOTIFY_INTERFACE_UP                 4
+#define SCTP_NOTIFY_SENT_DG_FAIL                 5
+#define SCTP_NOTIFY_UNSENT_DG_FAIL               6
+#define SCTP_NOTIFY_SPECIAL_SP_FAIL              7
+#define SCTP_NOTIFY_ASSOC_LOC_ABORTED            8
+#define SCTP_NOTIFY_ASSOC_REM_ABORTED            9
+#define SCTP_NOTIFY_ASSOC_RESTART               10
+#define SCTP_NOTIFY_PEER_SHUTDOWN               11
+#define SCTP_NOTIFY_ASCONF_ADD_IP               12
+#define SCTP_NOTIFY_ASCONF_DELETE_IP            13
+#define SCTP_NOTIFY_ASCONF_SET_PRIMARY          14
+#define SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION 15
+#define SCTP_NOTIFY_INTERFACE_CONFIRMED         16
+#define SCTP_NOTIFY_STR_RESET_RECV              17
+#define SCTP_NOTIFY_STR_RESET_SEND              18
+#define SCTP_NOTIFY_STR_RESET_FAILED_OUT        19
+#define SCTP_NOTIFY_STR_RESET_FAILED_IN         20
+#define SCTP_NOTIFY_STR_RESET_DENIED_OUT        21
+#define SCTP_NOTIFY_STR_RESET_DENIED_IN         22
+#define SCTP_NOTIFY_AUTH_NEW_KEY                23
+#define SCTP_NOTIFY_AUTH_FREE_KEY               24
+#define SCTP_NOTIFY_NO_PEER_AUTH                25
+#define SCTP_NOTIFY_SENDER_DRY                  26
+#define SCTP_NOTIFY_REMOTE_ERROR                27
+
+/* This is the value for messages that are NOT completely
+ * copied down where we will start to split the message.
+ * So, with our default, we split only if the piece we
+ * want to take will fill up a full MTU (assuming
+ * a 1500 byte MTU).
+ */
+#define SCTP_DEFAULT_SPLIT_POINT_MIN 2904
+
+/* Maximum length of diagnostic information in error causes */
+#define SCTP_DIAG_INFO_LEN 64
+
+/* ABORT CODES and other tell-tale location
+ * codes are generated by adding the below
+ * to the instance id.
+ */
+
+/* File defines */
+#define SCTP_FROM_SCTP_INPUT        0x10000000
+#define SCTP_FROM_SCTP_PCB          0x20000000
+#define SCTP_FROM_SCTP_INDATA       0x30000000
+#define SCTP_FROM_SCTP_TIMER        0x40000000
+#define SCTP_FROM_SCTP_USRREQ       0x50000000
+#define SCTP_FROM_SCTPUTIL          0x60000000
+#define SCTP_FROM_SCTP6_USRREQ      0x70000000
+#define SCTP_FROM_SCTP_ASCONF       0x80000000
+#define SCTP_FROM_SCTP_OUTPUT       0x90000000
+#define SCTP_FROM_SCTP_PEELOFF      0xa0000000
+#define SCTP_FROM_SCTP_PANDA        0xb0000000
+#define SCTP_FROM_SCTP_SYSCTL       0xc0000000
+#define SCTP_FROM_SCTP_CC_FUNCTIONS 0xd0000000
+
+/* Location ID's */
+#define SCTP_LOC_1  0x00000001
+#define SCTP_LOC_2  0x00000002
+#define SCTP_LOC_3  0x00000003
+#define SCTP_LOC_4  0x00000004
+#define SCTP_LOC_5  0x00000005
+#define SCTP_LOC_6  0x00000006
+#define SCTP_LOC_7  0x00000007
+#define SCTP_LOC_8  0x00000008
+#define SCTP_LOC_9  0x00000009
+#define SCTP_LOC_10 0x0000000a
+#define SCTP_LOC_11 0x0000000b
+#define SCTP_LOC_12 0x0000000c
+#define SCTP_LOC_13 0x0000000d
+#define SCTP_LOC_14 0x0000000e
+#define SCTP_LOC_15 0x0000000f
+#define SCTP_LOC_16 0x00000010
+#define SCTP_LOC_17 0x00000011
+#define SCTP_LOC_18 0x00000012
+#define SCTP_LOC_19 0x00000013
+#define SCTP_LOC_20 0x00000014
+#define SCTP_LOC_21 0x00000015
+#define SCTP_LOC_22 0x00000016
+#define SCTP_LOC_23 0x00000017
+#define SCTP_LOC_24 0x00000018
+#define SCTP_LOC_25 0x00000019
+#define SCTP_LOC_26 0x0000001a
+#define SCTP_LOC_27 0x0000001b
+#define SCTP_LOC_28 0x0000001c
+#define SCTP_LOC_29 0x0000001d
+#define SCTP_LOC_30 0x0000001e
+#define SCTP_LOC_31 0x0000001f
+#define SCTP_LOC_32 0x00000020
+#define SCTP_LOC_33 0x00000021
+#define SCTP_LOC_34 0x00000022
+#define SCTP_LOC_35 0x00000023
+
+
+/* Free assoc codes */
+#define SCTP_NORMAL_PROC      0
+#define SCTP_PCBFREE_NOFORCE  1
+#define SCTP_PCBFREE_FORCE    2
+
+/* From codes for adding addresses */
+#define SCTP_ADDR_IS_CONFIRMED 8
+#define SCTP_ADDR_DYNAMIC_ADDED 6
+#define SCTP_IN_COOKIE_PROC 100
+#define SCTP_ALLOC_ASOC  1
+#define SCTP_LOAD_ADDR_2 2
+#define SCTP_LOAD_ADDR_3 3
+#define SCTP_LOAD_ADDR_4 4
+#define SCTP_LOAD_ADDR_5 5
+
+#define SCTP_DONOT_SETSCOPE 0
+#define SCTP_DO_SETSCOPE 1
+
+
+/* This value determines the default for when
+ * we try to add more on the send queue., if
+ * there is room. This prevents us from cycling
+ * into the copy_resume routine to often if
+ * we have not got enough space to add a decent
+ * enough size message. Note that if we have enough
+ * space to complete the message copy we will always
+ * add to the message, no matter what the size. Its
+ * only when we reach the point that we have some left
+ * to add, there is only room for part of it that we
+ * will use this threshold. Its also a sysctl.
+ */
+#define SCTP_DEFAULT_ADD_MORE 1452
+
+#ifndef SCTP_PCBHASHSIZE
+/* default number of association hash buckets in each endpoint */
+#define SCTP_PCBHASHSIZE 256
+#endif
+#ifndef SCTP_TCBHASHSIZE
+#define SCTP_TCBHASHSIZE 1024
+#endif
+
+#ifndef SCTP_CHUNKQUEUE_SCALE
+#define SCTP_CHUNKQUEUE_SCALE 10
+#endif
+
+#ifdef __FreeBSD__
+/* clock variance is 1 ms */
+#define SCTP_CLOCK_GRANULARITY	1
+#else
+/* clock variance is 10 ms */
+#define SCTP_CLOCK_GRANULARITY	10
+#endif
+#define IP_HDR_SIZE 40		/* we use the size of a IP6 header here this
+				 * detracts a small amount for ipv4 but it
+				 * simplifies the ipv6 addition */
+
+/* Argument magic number for sctp_inpcb_free() */
+
+/* third argument */
+#define SCTP_CALLED_DIRECTLY_NOCMPSET     0
+#define SCTP_CALLED_AFTER_CMPSET_OFCLOSE  1
+#define SCTP_CALLED_FROM_INPKILL_TIMER    2
+/* second argument */
+#define SCTP_FREE_SHOULD_USE_ABORT          1
+#define SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE 0
+
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP 132	/* the Official IANA number :-) */
+#endif				/* !IPPROTO_SCTP */
+
+#define SCTP_MAX_DATA_BUNDLING		256
+
+/* modular comparison */
+/* See RFC 1982 for details. */
+#define SCTP_UINT16_GT(a, b) (((a < b) && ((uint16_t)(b - a) > (1U<<15))) || \
+                              ((a > b) && ((uint16_t)(a - b) < (1U<<15))))
+#define SCTP_UINT16_GE(a, b) (SCTP_UINT16_GT(a, b) || (a == b))
+#define SCTP_UINT32_GT(a, b) (((a < b) && ((uint32_t)(b - a) > (1U<<31))) || \
+                              ((a > b) && ((uint32_t)(a - b) < (1U<<31))))
+#define SCTP_UINT32_GE(a, b) (SCTP_UINT32_GT(a, b) || (a == b))
+
+#define SCTP_SSN_GT(a, b) SCTP_UINT16_GT(a, b)
+#define SCTP_SSN_GE(a, b) SCTP_UINT16_GE(a, b)
+#define SCTP_TSN_GT(a, b) SCTP_UINT32_GT(a, b)
+#define SCTP_TSN_GE(a, b) SCTP_UINT32_GE(a, b)
+#define SCTP_MID_GT(i, a, b) (((i) == 1) ? SCTP_UINT32_GT(a, b) : SCTP_UINT16_GT((uint16_t)a, (uint16_t)b))
+#define SCTP_MID_GE(i, a, b) (((i) == 1) ? SCTP_UINT32_GE(a, b) : SCTP_UINT16_GE((uint16_t)a, (uint16_t)b))
+#define SCTP_MID_EQ(i, a, b) (((i) == 1) ? a == b : (uint16_t)a == (uint16_t)b)
+
+/* Mapping array manipulation routines */
+#define SCTP_IS_TSN_PRESENT(arry, gap) ((arry[(gap >> 3)] >> (gap & 0x07)) & 0x01)
+#define SCTP_SET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] |= (0x01 << ((gap & 0x07))))
+#define SCTP_UNSET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] &= ((~(0x01 << ((gap & 0x07)))) & 0xff))
+#define SCTP_CALC_TSN_TO_GAP(gap, tsn, mapping_tsn) do { \
+	                if (tsn >= mapping_tsn) { \
+						gap = tsn - mapping_tsn; \
+					} else { \
+						gap = (MAX_TSN - mapping_tsn) + tsn + 1; \
+					} \
+                  } while (0)
+
+
+#define SCTP_RETRAN_DONE -1
+#define SCTP_RETRAN_EXIT -2
+
+/*
+ * This value defines the number of vtag block time wait entry's per list
+ * element.  Each entry will take 2 4 byte ints (and of course the overhead
+ * of the next pointer as well). Using 15 as an example will yield * ((8 *
+ * 15) + 8) or 128 bytes of overhead for each timewait block that gets
+ * initialized. Increasing it to 31 would yield 256 bytes per block.
+ */
+#define SCTP_NUMBER_IN_VTAG_BLOCK 15
+/*
+ * If we use the STACK option, we have an array of this size head pointers.
+ * This array is mod'd the with the size to find which bucket and then all
+ * entries must be searched to see if the tag is in timed wait. If so we
+ * reject it.
+ */
+#define SCTP_STACK_VTAG_HASH_SIZE   32
+
+/*
+ * Number of seconds of time wait for a vtag.
+ */
+#define SCTP_TIME_WAIT 60
+
+/* How many micro seconds is the cutoff from
+ * local lan type rtt's
+ */
+ /*
+  * We allow 900us for the rtt.
+  */
+#define SCTP_LOCAL_LAN_RTT 900
+#define SCTP_LAN_UNKNOWN  0
+#define SCTP_LAN_LOCAL    1
+#define SCTP_LAN_INTERNET 2
+
+#define SCTP_SEND_BUFFER_SPLITTING 0x00000001
+#define SCTP_RECV_BUFFER_SPLITTING 0x00000002
+
+/* The system retains a cache of free chunks such to
+ * cut down on calls the memory allocation system. There
+ * is a per association limit of free items and a overall
+ * system limit. If either one gets hit then the resource
+ * stops being cached.
+ */
+
+#define SCTP_DEF_ASOC_RESC_LIMIT 10
+#define SCTP_DEF_SYSTEM_RESC_LIMIT 1000
+
+/*-
+ * defines for socket lock states.
+ * Used by __APPLE__ and SCTP_SO_LOCK_TESTING
+ */
+#define SCTP_SO_LOCKED		1
+#define SCTP_SO_NOT_LOCKED	0
+
+
+#define SCTP_HOLDS_LOCK 1
+#define SCTP_NOT_LOCKED 0
+
+/*-
+ * For address locks, do we hold the lock?
+ */
+#define SCTP_ADDR_LOCKED 1
+#define SCTP_ADDR_NOT_LOCKED 0
+
+#define IN4_ISPRIVATE_ADDRESS(a) \
+   ((((uint8_t *)&(a)->s_addr)[0] == 10) || \
+    ((((uint8_t *)&(a)->s_addr)[0] == 172) && \
+     (((uint8_t *)&(a)->s_addr)[1] >= 16) && \
+     (((uint8_t *)&(a)->s_addr)[1] <= 32)) || \
+    ((((uint8_t *)&(a)->s_addr)[0] == 192) && \
+     (((uint8_t *)&(a)->s_addr)[1] == 168)))
+
+#define IN4_ISLOOPBACK_ADDRESS(a) \
+    (((uint8_t *)&(a)->s_addr)[0] == 127)
+
+#define IN4_ISLINKLOCAL_ADDRESS(a) \
+    ((((uint8_t *)&(a)->s_addr)[0] == 169) && \
+     (((uint8_t *)&(a)->s_addr)[1] == 254))
+
+#if defined(__Userspace__)
+#if defined(__Userspace_os_Windows)
+#define SCTP_GETTIME_TIMEVAL(x)	getwintimeofday(x)
+#define SCTP_GETPTIME_TIMEVAL(x) getwintimeofday(x) /* this doesn't seem to ever be used.. */
+#else
+#define SCTP_GETTIME_TIMEVAL(x)	gettimeofday(x, NULL)
+#define SCTP_GETPTIME_TIMEVAL(x) gettimeofday(x, NULL)
+#endif
+#endif
+
+#if defined(_KERNEL)
+#define SCTP_GETTIME_TIMEVAL(x) (getmicrouptime(x))
+#define SCTP_GETPTIME_TIMEVAL(x) (microuptime(x))
+#endif
+
+#if defined(_KERNEL) || defined(__Userspace__)
+#define sctp_sowwakeup(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
+	} else { \
+		sowwakeup(so); \
+	} \
+} while (0)
+
+#if defined(__FreeBSD__) || defined(__Windows__) || defined(__Userspace__)
+#define sctp_sowwakeup_locked(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+                SOCKBUF_UNLOCK(&((so)->so_snd)); \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
+	} else { \
+		sowwakeup_locked(so); \
+	} \
+} while (0)
+#else
+#define sctp_sowwakeup_locked(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+                SOCKBUF_UNLOCK(&((so)->so_snd)); \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
+	} else { \
+		sowwakeup(so); \
+	} \
+} while (0)
+#endif
+
+#define sctp_sorwakeup(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
+	} else { \
+		sorwakeup(so); \
+	} \
+} while (0)
+
+#if defined(__FreeBSD__) || defined(__Windows__) || defined(__Userspace__)
+#define sctp_sorwakeup_locked(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
+                SOCKBUF_UNLOCK(&((so)->so_rcv)); \
+	} else { \
+		sorwakeup_locked(so); \
+	} \
+} while (0)
+#else
+
+#define sctp_sorwakeup_locked(inp, so) \
+do { \
+	if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
+		inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
+                SOCKBUF_UNLOCK(&((so)->so_rcv)); \
+	} else { \
+		sorwakeup(so); \
+	} \
+} while (0)
+#endif
+
+#endif				/* _KERNEL || __Userspace__*/
+#endif