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Annotation of embedaddon/iftop/tcp.h, revision 1.1.1.1

1.1       misho       1: /* @(#) $Header: /home/pdw/vcvs/repos/iftop/tcp.h,v 1.2 2003/06/06 22:42:35 pdw Exp $ (LBL) */
                      2: /*
                      3:  * Copyright (c) 1982, 1986, 1993
                      4:  *     The Regents of the University of California.  All rights reserved.
                      5:  *
                      6:  * Redistribution and use in source and binary forms, with or without
                      7:  * modification, are permitted provided that the following conditions
                      8:  * are met:
                      9:  * 1. Redistributions of source code must retain the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer.
                     11:  * 2. Redistributions in binary form must reproduce the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer in the
                     13:  *    documentation and/or other materials provided with the distribution.
                     14:  * 3. All advertising materials mentioning features or use of this software
                     15:  *    must display the following acknowledgement:
                     16:  *     This product includes software developed by the University of
                     17:  *     California, Berkeley and its contributors.
                     18:  * 4. Neither the name of the University nor the names of its contributors
                     19:  *    may be used to endorse or promote products derived from this software
                     20:  *    without specific prior written permission.
                     21:  *
                     22:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     23:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     24:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     25:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     26:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     27:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     28:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     29:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     30:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     31:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     32:  * SUCH DAMAGE.
                     33:  *
                     34:  *     @(#)tcp.h       8.1 (Berkeley) 6/10/93
                     35:  */
                     36: 
                     37: typedef        u_int32_t       tcp_seq;
                     38: /*
                     39:  * TCP header.
                     40:  * Per RFC 793, September, 1981.
                     41:  */
                     42: struct tcphdr {
                     43:        u_int16_t       th_sport;               /* source port */
                     44:        u_int16_t       th_dport;               /* destination port */
                     45:        tcp_seq         th_seq;                 /* sequence number */
                     46:        tcp_seq         th_ack;                 /* acknowledgement number */
                     47:        u_int8_t        th_offx2;               /* data offset, rsvd */
                     48: #define TH_OFF(th)     (((th)->th_offx2 & 0xf0) >> 4)
                     49:        u_int8_t        th_flags;
                     50: #define        TH_FIN  0x01
                     51: #define        TH_SYN  0x02
                     52: #define        TH_RST  0x04
                     53: #define        TH_PUSH 0x08
                     54: #define        TH_ACK  0x10
                     55: #define        TH_URG  0x20
                     56: #define TH_ECNECHO     0x40    /* ECN Echo */
                     57: #define TH_CWR         0x80    /* ECN Cwnd Reduced */
                     58:        u_int16_t       th_win;                 /* window */
                     59:        u_int16_t       th_sum;                 /* checksum */
                     60:        u_int16_t       th_urp;                 /* urgent pointer */
                     61: };
                     62: 
                     63: #define        TCPOPT_EOL              0
                     64: #define        TCPOPT_NOP              1
                     65: #define        TCPOPT_MAXSEG           2
                     66: #define    TCPOLEN_MAXSEG              4
                     67: #define        TCPOPT_WSCALE           3       /* window scale factor (rfc1323) */
                     68: #define        TCPOPT_SACKOK           4       /* selective ack ok (rfc2018) */
                     69: #define        TCPOPT_SACK             5       /* selective ack (rfc2018) */
                     70: #define        TCPOPT_ECHO             6       /* echo (rfc1072) */
                     71: #define        TCPOPT_ECHOREPLY        7       /* echo (rfc1072) */
                     72: #define TCPOPT_TIMESTAMP       8       /* timestamp (rfc1323) */
                     73: #define    TCPOLEN_TIMESTAMP           10
                     74: #define    TCPOLEN_TSTAMP_APPA         (TCPOLEN_TIMESTAMP+2) /* appendix A */
                     75: #define TCPOPT_CC              11      /* T/TCP CC options (rfc1644) */
                     76: #define TCPOPT_CCNEW           12      /* T/TCP CC options (rfc1644) */
                     77: #define TCPOPT_CCECHO          13      /* T/TCP CC options (rfc1644) */
                     78: 
                     79: #define TCPOPT_TSTAMP_HDR      \
                     80:     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)