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tcp.h

/*
 * $Header: /cvsroot/jnettop/jnettop/include/tcp.h,v 1.3 2002/08/31 17:15:03 merunka Exp $
 * 
 * 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     guint32     tcp_seq;
/*
 * TCP header.
 * Per RFC 793, September, 1981.
 */
00043 struct tcphdr {
      guint16     th_sport;         /* source port */
      guint16     th_dport;         /* destination port */
      tcp_seq           th_seq;                 /* sequence number */
      tcp_seq           th_ack;                 /* acknowledgement number */
      guint8      th_offx2;         /* data offset, rsvd */
#define TH_OFF(th)      (((th)->th_offx2 & 0xf0) >> 4)
      guint8      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 */
      guint16     th_win;                 /* window */
      guint16     th_sum;                 /* checksum */
      guint16     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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