external/bsd/tcpdump/dist/tcp.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)tcp.h       8.1 (Berkeley) 6/10/93
  30  */
  31
  32 typedef uint32_t        tcp_seq;
  33 /*
  34  * TCP header.
  35  * Per RFC 793, September, 1981.
  36  */
  37 struct tcphdr {
  38         uint16_t        th_sport;               /* source port */
  39         uint16_t        th_dport;               /* destination port */
  40         tcp_seq         th_seq;                 /* sequence number */
  41         tcp_seq         th_ack;                 /* acknowledgement number */
  42         uint8_t         th_offx2;               /* data offset, rsvd */
  43         uint8_t         th_flags;
  44         uint16_t        th_win;                 /* window */
  45         uint16_t        th_sum;                 /* checksum */
  46         uint16_t        th_urp;                 /* urgent pointer */
  47 } UNALIGNED;
  48
  49 #define TH_OFF(th)      (((th)->th_offx2 & 0xf0) >> 4)
  50
  51 /* TCP flags */
  52 #define TH_FIN     0x01
  53 #define TH_SYN     0x02
  54 #define TH_RST     0x04
  55 #define TH_PUSH    0x08
  56 #define TH_ACK     0x10
  57 #define TH_URG     0x20
  58 #define TH_ECNECHO 0x40 /* ECN Echo */
  59 #define TH_CWR     0x80 /* ECN Cwnd Reduced */
  60
  61
  62 #define TCPOPT_EOL              0
  63 #define TCPOPT_NOP              1
  64 #define TCPOPT_MAXSEG           2
  65 #define    TCPOLEN_MAXSEG               4
  66 #define TCPOPT_WSCALE           3       /* window scale factor (rfc1323) */
  67 #define TCPOPT_SACKOK           4       /* selective ack ok (rfc2018) */
  68 #define TCPOPT_SACK             5       /* selective ack (rfc2018) */
  69 #define TCPOPT_ECHO             6       /* echo (rfc1072) */
  70 #define TCPOPT_ECHOREPLY        7       /* echo (rfc1072) */
  71 #define TCPOPT_TIMESTAMP        8       /* timestamp (rfc1323) */
  72 #define    TCPOLEN_TIMESTAMP            10
  73 #define    TCPOLEN_TSTAMP_APPA          (TCPOLEN_TIMESTAMP+2) /* appendix A */
  74 #define TCPOPT_CC               11      /* T/TCP CC options (rfc1644) */
  75 #define TCPOPT_CCNEW            12      /* T/TCP CC options (rfc1644) */
  76 #define TCPOPT_CCECHO           13      /* T/TCP CC options (rfc1644) */
  77 #define TCPOPT_SIGNATURE        19      /* Keyed MD5 (rfc2385) */
  78 #define    TCPOLEN_SIGNATURE            18
  79 #define TCP_SIGLEN 16                   /* length of an option 19 digest */
  80 #define TCPOPT_AUTH             20      /* Enhanced AUTH option */
  81 #define TCPOPT_UTO              28      /* tcp user timeout (rfc5482) */
  82 #define    TCPOLEN_UTO                  4
  83 #define TCPOPT_MPTCP            30      /* MPTCP options */
  84 #define TCPOPT_EXPERIMENT2      254     /* experimental headers (rfc4727) */
  85
  86 #define TCPOPT_TSTAMP_HDR       \
  87     (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
  88
  89 #ifndef TELNET_PORT
  90 #define TELNET_PORT             23
  91 #endif
  92 #ifndef SMTP_PORT
  93 #define SMTP_PORT               25
  94 #endif
  95 #ifndef BGP_PORT
  96 #define BGP_PORT                179
  97 #endif
  98 #define NETBIOS_SSN_PORT        139
  99 #ifndef OPENFLOW_PORT_OLD
 100 #define OPENFLOW_PORT_OLD       6633
 101 #endif
 102 #ifndef OPENFLOW_PORT_IANA
 103 #define OPENFLOW_PORT_IANA      6653
 104 #endif
 105 #ifndef PPTP_PORT
 106 #define PPTP_PORT               1723
 107 #endif
 108 #define BEEP_PORT               10288
 109 #ifndef NFS_PORT
 110 #define NFS_PORT                2049
 111 #endif
 112 #define MSDP_PORT               639
 113 #define RPKI_RTR_PORT           323
 114 #define LDP_PORT                646
 115 #ifndef SMB_PORT
 116 #define SMB_PORT                445
 117 #endif
 118 #ifndef HTTP_PORT
 119 #define HTTP_PORT               80
 120 #endif
 121 #ifndef HTTP_PORT_ALT
 122 #define HTTP_PORT_ALT           8080
 123 #endif
 124 #ifndef RTSP_PORT
 125 #define RTSP_PORT               554
 126 #endif
 127 #ifndef RTSP_PORT_ALT
 128 #define RTSP_PORT_ALT           8554
 129 #endif
 130 #ifndef FTP_PORT
 131 #define FTP_PORT                21
 132 #endif