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
| 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
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35 */ 36 37#ifndef _NETINET_TCP_H_ 38#define _NETINET_TCP_H_ 39 40typedef u_long tcp_seq; 41typedef u_long tcp_cc; /* connection count per rfc1644 */ 42 43/* 44 * TCP header. 45 * Per RFC 793, September, 1981. 46 */ 47struct tcphdr { 48 u_short th_sport; /* source port */ 49 u_short th_dport; /* destination port */ 50 tcp_seq th_seq; /* sequence number */ 51 tcp_seq th_ack; /* acknowledgement number */ 52#if BYTE_ORDER == LITTLE_ENDIAN
| 35 */ 36 37#ifndef _NETINET_TCP_H_ 38#define _NETINET_TCP_H_ 39 40typedef u_long tcp_seq; 41typedef u_long tcp_cc; /* connection count per rfc1644 */ 42 43/* 44 * TCP header. 45 * Per RFC 793, September, 1981. 46 */ 47struct tcphdr { 48 u_short th_sport; /* source port */ 49 u_short th_dport; /* destination port */ 50 tcp_seq th_seq; /* sequence number */ 51 tcp_seq th_ack; /* acknowledgement number */ 52#if BYTE_ORDER == LITTLE_ENDIAN
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58 th_x2:4; /* (unused) */ 59#endif 60 u_char th_flags; 61#define TH_FIN 0x01 62#define TH_SYN 0x02 63#define TH_RST 0x04 64#define TH_PUSH 0x08 65#define TH_ACK 0x10 66#define TH_URG 0x20 67#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG) 68 69 u_short th_win; /* window */ 70 u_short th_sum; /* checksum */ 71 u_short th_urp; /* urgent pointer */ 72}; 73 74#define TCPOPT_EOL 0 75#define TCPOPT_NOP 1 76#define TCPOPT_MAXSEG 2 77#define TCPOLEN_MAXSEG 4 78#define TCPOPT_WINDOW 3 79#define TCPOLEN_WINDOW 3 80#define TCPOPT_SACK_PERMITTED 4 /* Experimental */ 81#define TCPOLEN_SACK_PERMITTED 2 82#define TCPOPT_SACK 5 /* Experimental */ 83#define TCPOPT_TIMESTAMP 8 84#define TCPOLEN_TIMESTAMP 10 85#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ 86#define TCPOPT_TSTAMP_HDR \ 87 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) 88 89#define TCPOPT_CC 11 /* CC options: RFC-1644 */ 90#define TCPOPT_CCNEW 12 91#define TCPOPT_CCECHO 13 92#define TCPOLEN_CC 6 93#define TCPOLEN_CC_APPA (TCPOLEN_CC+2) 94#define TCPOPT_CC_HDR(ccopt) \ 95 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC) 96 97/* 98 * Default maximum segment size for TCP. 99 * With an IP MSS of 576, this is 536, 100 * but 512 is probably more convenient. 101 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). 102 */ 103#define TCP_MSS 512 104 105#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ 106#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ 107 108#define TCP_MAX_WINSHIFT 14 /* maximum window shift */ 109 110#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ 111#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) 112 /* max space left for options */ 113 114/* 115 * User-settable options (used with setsockopt). 116 */ 117#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ 118#define TCP_MAXSEG 0x02 /* set maximum segment size */ 119#define TCP_NOPUSH 0x04 /* don't push last block of write */ 120#define TCP_NOOPT 0x08 /* don't use TCP options */ 121 122#endif
| 58 th_x2:4; /* (unused) */ 59#endif 60 u_char th_flags; 61#define TH_FIN 0x01 62#define TH_SYN 0x02 63#define TH_RST 0x04 64#define TH_PUSH 0x08 65#define TH_ACK 0x10 66#define TH_URG 0x20 67#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG) 68 69 u_short th_win; /* window */ 70 u_short th_sum; /* checksum */ 71 u_short th_urp; /* urgent pointer */ 72}; 73 74#define TCPOPT_EOL 0 75#define TCPOPT_NOP 1 76#define TCPOPT_MAXSEG 2 77#define TCPOLEN_MAXSEG 4 78#define TCPOPT_WINDOW 3 79#define TCPOLEN_WINDOW 3 80#define TCPOPT_SACK_PERMITTED 4 /* Experimental */ 81#define TCPOLEN_SACK_PERMITTED 2 82#define TCPOPT_SACK 5 /* Experimental */ 83#define TCPOPT_TIMESTAMP 8 84#define TCPOLEN_TIMESTAMP 10 85#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ 86#define TCPOPT_TSTAMP_HDR \ 87 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) 88 89#define TCPOPT_CC 11 /* CC options: RFC-1644 */ 90#define TCPOPT_CCNEW 12 91#define TCPOPT_CCECHO 13 92#define TCPOLEN_CC 6 93#define TCPOLEN_CC_APPA (TCPOLEN_CC+2) 94#define TCPOPT_CC_HDR(ccopt) \ 95 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC) 96 97/* 98 * Default maximum segment size for TCP. 99 * With an IP MSS of 576, this is 536, 100 * but 512 is probably more convenient. 101 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). 102 */ 103#define TCP_MSS 512 104 105#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ 106#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ 107 108#define TCP_MAX_WINSHIFT 14 /* maximum window shift */ 109 110#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ 111#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) 112 /* max space left for options */ 113 114/* 115 * User-settable options (used with setsockopt). 116 */ 117#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ 118#define TCP_MAXSEG 0x02 /* set maximum segment size */ 119#define TCP_NOPUSH 0x04 /* don't push last block of write */ 120#define TCP_NOOPT 0x08 /* don't use TCP options */ 121 122#endif
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