/* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.13.2.1 2007-12-09 00:31:35 guy 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 */ u_int8_t th_flags; u_int16_t th_win; /* window */ u_int16_t th_sum; /* checksum */ u_int16_t th_urp; /* urgent pointer */ }; #define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4) /* TCP 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 */ #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_UTO 28 /* tcp user timeout (rfc5482) */ #define TCPOLEN_UTO 4 #define TCPOPT_TSTAMP_HDR \ (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) #ifndef TELNET_PORT #define TELNET_PORT 23 #endif #ifndef BGP_PORT #define BGP_PORT 179 #endif #define NETBIOS_SSN_PORT 139 #ifndef PPTP_PORT #define PPTP_PORT 1723 #endif #define BEEP_PORT 10288 #ifndef NFS_PORT #define NFS_PORT 2049 #endif #define MSDP_PORT 639 #define LDP_PORT 646 #ifndef SMB_PORT #define SMB_PORT 445 #endif