tcp.h revision 1.6
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 32typedef uint32_t tcp_seq; 33/* 34 * TCP header. 35 * Per RFC 793, September, 1981. 36 */ 37struct 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 133