| Junxiao Shi | 2222a61 | 2015-06-06 08:01:38 -0700 | [diff] [blame] | 1 | /* @(#) $Header: /tcpdump/master/tcpdump/tcp.h,v 1.14 2007-12-09 00:30:47 guy 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 | u_int8_t th_flags; |
| 49 | u_int16_t th_win; /* window */ |
| 50 | u_int16_t th_sum; /* checksum */ |
| 51 | u_int16_t th_urp; /* urgent pointer */ |
| 52 | }; |
| 53 | |
| 54 | #define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4) |
| 55 | |
| 56 | /* TCP flags */ |
| 57 | #define TH_FIN 0x01 |
| 58 | #define TH_SYN 0x02 |
| 59 | #define TH_RST 0x04 |
| 60 | #define TH_PUSH 0x08 |
| 61 | #define TH_ACK 0x10 |
| 62 | #define TH_URG 0x20 |
| 63 | #define TH_ECNECHO 0x40 /* ECN Echo */ |
| 64 | #define TH_CWR 0x80 /* ECN Cwnd Reduced */ |
| 65 | |
| 66 | |
| 67 | #define TCPOPT_EOL 0 |
| 68 | #define TCPOPT_NOP 1 |
| 69 | #define TCPOPT_MAXSEG 2 |
| 70 | #define TCPOLEN_MAXSEG 4 |
| 71 | #define TCPOPT_WSCALE 3 /* window scale factor (rfc1323) */ |
| 72 | #define TCPOPT_SACKOK 4 /* selective ack ok (rfc2018) */ |
| 73 | #define TCPOPT_SACK 5 /* selective ack (rfc2018) */ |
| 74 | #define TCPOPT_ECHO 6 /* echo (rfc1072) */ |
| 75 | #define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */ |
| 76 | #define TCPOPT_TIMESTAMP 8 /* timestamp (rfc1323) */ |
| 77 | #define TCPOLEN_TIMESTAMP 10 |
| 78 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ |
| 79 | #define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */ |
| 80 | #define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */ |
| 81 | #define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */ |
| 82 | #define TCPOPT_SIGNATURE 19 /* Keyed MD5 (rfc2385) */ |
| 83 | #define TCPOLEN_SIGNATURE 18 |
| 84 | #define TCP_SIGLEN 16 /* length of an option 19 digest */ |
| 85 | #define TCPOPT_AUTH 20 /* Enhanced AUTH option */ |
| 86 | #define TCPOPT_UTO 28 /* tcp user timeout (rfc5482) */ |
| 87 | #define TCPOLEN_UTO 4 |
| 88 | #define TCPOPT_MPTCP 30 /* MPTCP options */ |
| 89 | #define TCPOPT_EXPERIMENT2 254 /* experimental headers (rfc4727) */ |
| 90 | |
| 91 | #define TCPOPT_TSTAMP_HDR \ |
| 92 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) |
| 93 | |
| 94 | #ifndef TELNET_PORT |
| 95 | #define TELNET_PORT 23 |
| 96 | #endif |
| 97 | #ifndef BGP_PORT |
| 98 | #define BGP_PORT 179 |
| 99 | #endif |
| 100 | #define NETBIOS_SSN_PORT 139 |
| 101 | #ifndef OPENFLOW_PORT |
| 102 | #define OPENFLOW_PORT 6633 |
| 103 | #endif |
| 104 | #ifndef PPTP_PORT |
| 105 | #define PPTP_PORT 1723 |
| 106 | #endif |
| 107 | #define BEEP_PORT 10288 |
| 108 | #ifndef NFS_PORT |
| 109 | #define NFS_PORT 2049 |
| 110 | #endif |
| 111 | #define MSDP_PORT 639 |
| 112 | #define RPKI_RTR_PORT 323 |
| 113 | #define LDP_PORT 646 |
| 114 | #ifndef SMB_PORT |
| 115 | #define SMB_PORT 445 |
| 116 | #endif |