79 lines
3.2 KiB
C
79 lines
3.2 KiB
C
/* $NetBSD: tcp.h,v 1.2 2003/08/07 09:21:13 agc Exp $ */
|
|
|
|
/* @(#) Header: /tcpdump/master/tcpdump/tcp.h,v 1.8 2001/05/09 01:16:57 fenner 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. 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_TSTAMP_HDR \
|
|
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
|