1235783Skib/* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.14 2007-12-09 00:30:47 guy Exp $ (LBL) */ 2235783Skib/* 3235783Skib * Copyright (c) 1982, 1986, 1993 4235783Skib * The Regents of the University of California. All rights reserved. 5235783Skib * 6235783Skib * Redistribution and use in source and binary forms, with or without 7235783Skib * modification, are permitted provided that the following conditions 8235783Skib * are met: 9235783Skib * 1. Redistributions of source code must retain the above copyright 10235783Skib * notice, this list of conditions and the following disclaimer. 11235783Skib * 2. Redistributions in binary form must reproduce the above copyright 12235783Skib * notice, this list of conditions and the following disclaimer in the 13235783Skib * documentation and/or other materials provided with the distribution. 14235783Skib * 3. All advertising materials mentioning features or use of this software 15235783Skib * must display the following acknowledgement: 16235783Skib * This product includes software developed by the University of 17235783Skib * California, Berkeley and its contributors. 18235783Skib * 4. Neither the name of the University nor the names of its contributors 19235783Skib * may be used to endorse or promote products derived from this software 20235783Skib * without specific prior written permission. 21235783Skib * 22235783Skib * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23235783Skib * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24235783Skib * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25235783Skib * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26235783Skib * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27235783Skib * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28235783Skib * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29235783Skib * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30235783Skib * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31235783Skib * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32235783Skib * SUCH DAMAGE. 33235783Skib * 34235783Skib * @(#)tcp.h 8.1 (Berkeley) 6/10/93 35235783Skib */ 36235783Skib 37235783Skibtypedef u_int32_t tcp_seq; 38235783Skib/* 39235783Skib * TCP header. 40235783Skib * Per RFC 793, September, 1981. 41235783Skib */ 42282199Sdumbbellstruct tcphdr { 43235783Skib u_int16_t th_sport; /* source port */ 44282199Sdumbbell u_int16_t th_dport; /* destination port */ 45282199Sdumbbell tcp_seq th_seq; /* sequence number */ 46282199Sdumbbell tcp_seq th_ack; /* acknowledgement number */ 47235783Skib u_int8_t th_offx2; /* data offset, rsvd */ 48282199Sdumbbell u_int8_t th_flags; 49282199Sdumbbell u_int16_t th_win; /* window */ 50235783Skib u_int16_t th_sum; /* checksum */ 51282199Sdumbbell u_int16_t th_urp; /* urgent pointer */ 52282199Sdumbbell}; 53282199Sdumbbell 54282199Sdumbbell#define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4) 55282199Sdumbbell 56282199Sdumbbell/* TCP flags */ 57282199Sdumbbell#define TH_FIN 0x01 58282199Sdumbbell#define TH_SYN 0x02 59282199Sdumbbell#define TH_RST 0x04 60282199Sdumbbell#define TH_PUSH 0x08 61235783Skib#define TH_ACK 0x10 62282199Sdumbbell#define TH_URG 0x20 63235783Skib#define TH_ECNECHO 0x40 /* ECN Echo */ 64235783Skib#define TH_CWR 0x80 /* ECN Cwnd Reduced */ 65235783Skib 66235783Skib 67235783Skib#define TCPOPT_EOL 0 68235783Skib#define TCPOPT_NOP 1 69235783Skib#define TCPOPT_MAXSEG 2 70235783Skib#define TCPOLEN_MAXSEG 4 71235783Skib#define TCPOPT_WSCALE 3 /* window scale factor (rfc1323) */ 72235783Skib#define TCPOPT_SACKOK 4 /* selective ack ok (rfc2018) */ 73235783Skib#define TCPOPT_SACK 5 /* selective ack (rfc2018) */ 74235783Skib#define TCPOPT_ECHO 6 /* echo (rfc1072) */ 75235783Skib#define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */ 76282199Sdumbbell#define TCPOPT_TIMESTAMP 8 /* timestamp (rfc1323) */ 77235783Skib#define TCPOLEN_TIMESTAMP 10 78282199Sdumbbell#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ 79235783Skib#define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */ 80235783Skib#define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */ 81235783Skib#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */ 82235783Skib#define TCPOPT_SIGNATURE 19 /* Keyed MD5 (rfc2385) */ 83282199Sdumbbell#define TCPOLEN_SIGNATURE 18 84235783Skib#define TCP_SIGLEN 16 /* length of an option 19 digest */ 85235783Skib#define TCPOPT_AUTH 20 /* Enhanced AUTH option */ 86235783Skib#define TCPOPT_UTO 28 /* tcp user timeout (rfc5482) */ 87235783Skib#define TCPOLEN_UTO 4 88235783Skib 89235783Skib 90235783Skib#define TCPOPT_TSTAMP_HDR \ 91235783Skib (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) 92235783Skib 93235783Skib#ifndef TELNET_PORT 94235783Skib#define TELNET_PORT 23 95235783Skib#endif 96235783Skib#ifndef BGP_PORT 97282199Sdumbbell#define BGP_PORT 179 98282199Sdumbbell#endif 99282199Sdumbbell#define NETBIOS_SSN_PORT 139 100282199Sdumbbell#ifndef PPTP_PORT 101282199Sdumbbell#define PPTP_PORT 1723 102282199Sdumbbell#endif 103282199Sdumbbell#define BEEP_PORT 10288 104282199Sdumbbell#ifndef NFS_PORT 105235783Skib#define NFS_PORT 2049 106235783Skib#endif 107235783Skib#define MSDP_PORT 639 108235783Skib#define RPKI_RTR_PORT 323 109235783Skib#define LDP_PORT 646 110235783Skib#ifndef SMB_PORT 111235783Skib#define SMB_PORT 445 112235783Skib#endif 113235783Skib