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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp.h 8.1 (Berkeley) 6/10/93 34 */ 35 36typedef uint32_t tcp_seq; 37/* 38 * TCP header. 39 * Per RFC 793, September, 1981. 40 */ 41struct tcphdr { 42 uint16_t th_sport; /* source port */ 43 uint16_t th_dport; /* destination port */ 44 tcp_seq th_seq; /* sequence number */ 45 tcp_seq th_ack; /* acknowledgement number */ 46 uint8_t th_offx2; /* data offset, rsvd */ 47 uint8_t th_flags; 48 uint16_t th_win; /* window */ 49 uint16_t th_sum; /* checksum */ 50 uint16_t th_urp; /* urgent pointer */ 51} UNALIGNED; 52 53#define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4) 54 55/* TCP flags */ 56#define TH_FIN 0x01 57#define TH_SYN 0x02 58#define TH_RST 0x04 59#define TH_PUSH 0x08 60#define TH_ACK 0x10 61#define TH_URG 0x20 62#define TH_ECNECHO 0x40 /* ECN Echo */ 63#define TH_CWR 0x80 /* ECN Cwnd Reduced */ 64 65 66#define TCPOPT_EOL 0 67#define TCPOPT_NOP 1 68#define TCPOPT_MAXSEG 2 69#define TCPOLEN_MAXSEG 4 70#define TCPOPT_WSCALE 3 /* window scale factor (rfc1323) */ 71#define TCPOPT_SACKOK 4 /* selective ack ok (rfc2018) */ 72#define TCPOPT_SACK 5 /* selective ack (rfc2018) */ 73#define TCPOPT_ECHO 6 /* echo (rfc1072) */ 74#define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */ 75#define TCPOPT_TIMESTAMP 8 /* timestamp (rfc1323) */ 76#define TCPOLEN_TIMESTAMP 10 77#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ 78#define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */ 79#define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */ 80#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */ 81#define TCPOPT_SIGNATURE 19 /* Keyed MD5 (rfc2385) */ 82#define TCPOLEN_SIGNATURE 18 83#define TCP_SIGLEN 16 /* length of an option 19 digest */ 84#define TCPOPT_AUTH 20 /* Enhanced AUTH option */ 85#define TCPOPT_UTO 28 /* tcp user timeout (rfc5482) */ 86#define TCPOLEN_UTO 4 87#define TCPOPT_MPTCP 30 /* MPTCP options */ 88#define TCPOPT_EXPERIMENT2 254 /* experimental headers (rfc4727) */ 89 90#define TCPOPT_TSTAMP_HDR \ 91 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) 92 93#ifndef TELNET_PORT 94#define TELNET_PORT 23 95#endif 96#ifndef SMTP_PORT 97#define SMTP_PORT 25 98#endif 99#ifndef BGP_PORT 100#define BGP_PORT 179 101#endif 102#define NETBIOS_SSN_PORT 139 103#ifndef OPENFLOW_PORT_OLD 104#define OPENFLOW_PORT_OLD 6633 105#endif 106#ifndef OPENFLOW_PORT_IANA 107#define OPENFLOW_PORT_IANA 6653 108#endif 109#ifndef PPTP_PORT 110#define PPTP_PORT 1723 111#endif 112#define BEEP_PORT 10288 113#ifndef NFS_PORT 114#define NFS_PORT 2049 115#endif 116#define MSDP_PORT 639 117#define RPKI_RTR_PORT 323 118#define LDP_PORT 646 119#ifndef SMB_PORT 120#define SMB_PORT 445 121#endif 122#ifndef HTTP_PORT 123#define HTTP_PORT 80 124#endif 125#ifndef HTTP_PORT_ALT 126#define HTTP_PORT_ALT 8080 127#endif 128#ifndef RTSP_PORT 129#define RTSP_PORT 554 130#endif 131#ifndef RTSP_PORT_ALT 132#define RTSP_PORT_ALT 8554 133#endif 134#ifndef FTP_PORT 135#define FTP_PORT 21 136#endif 137