| /* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.11.2.1 2005/11/29 09:09:26 hannes Exp $ (LBL) */ |
| /* |
| * Copyright (c) 1982, 1986, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. |
| * |
| * @(#)tcp.h 8.1 (Berkeley) 6/10/93 |
| */ |
| |
| typedef u_int32_t tcp_seq; |
| /* |
| * TCP header. |
| * Per RFC 793, September, 1981. |
| */ |
| struct tcphdr { |
| u_int16_t th_sport; /* source port */ |
| u_int16_t th_dport; /* destination port */ |
| tcp_seq th_seq; /* sequence number */ |
| tcp_seq th_ack; /* acknowledgement number */ |
| u_int8_t th_offx2; /* data offset, rsvd */ |
| #define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4) |
| u_int8_t th_flags; |
| #define TH_FIN 0x01 |
| #define TH_SYN 0x02 |
| #define TH_RST 0x04 |
| #define TH_PUSH 0x08 |
| #define TH_ACK 0x10 |
| #define TH_URG 0x20 |
| #define TH_ECNECHO 0x40 /* ECN Echo */ |
| #define TH_CWR 0x80 /* ECN Cwnd Reduced */ |
| u_int16_t th_win; /* window */ |
| u_int16_t th_sum; /* checksum */ |
| u_int16_t th_urp; /* urgent pointer */ |
| }; |
| |
| #define TCPOPT_EOL 0 |
| #define TCPOPT_NOP 1 |
| #define TCPOPT_MAXSEG 2 |
| #define TCPOLEN_MAXSEG 4 |
| #define TCPOPT_WSCALE 3 /* window scale factor (rfc1323) */ |
| #define TCPOPT_SACKOK 4 /* selective ack ok (rfc2018) */ |
| #define TCPOPT_SACK 5 /* selective ack (rfc2018) */ |
| #define TCPOPT_ECHO 6 /* echo (rfc1072) */ |
| #define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */ |
| #define TCPOPT_TIMESTAMP 8 /* timestamp (rfc1323) */ |
| #define TCPOLEN_TIMESTAMP 10 |
| #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ |
| #define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */ |
| #define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */ |
| #define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */ |
| #define TCPOPT_SIGNATURE 19 /* Keyed MD5 (rfc2385) */ |
| #define TCPOLEN_SIGNATURE 18 |
| #define TCP_SIGLEN 16 /* length of an option 19 digest */ |
| #define TCPOPT_AUTH 20 /* Enhanced AUTH option */ |
| |
| #define TCPOPT_TSTAMP_HDR \ |
| (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) |
