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- /* @(#) $Header: /home/pdw/vcvs/repos/iftop/tcp.h,v 1.2 2003/06/06 22:42:35 pdw 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_TSTAMP_HDR \
- (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
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