projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8ae0e4b4 | 1 | /* |
| ad787160 C |
2 | * Copyright (c) 1982, 1986, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 8ae0e4b4 | 4 | * |
| ad787160 C |
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. | |
| 2b6b6284 | 20 | * |
| ad787160 C |
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 | |
| 8ae0e4b4 | 34 | */ |
| 6e8b2eca | 35 | |
| 8a13b737 | 36 | typedef u_long tcp_seq; |
| 6e8b2eca | 37 | /* |
| eb44bfb2 | 38 | * TCP header. |
| 2b4b57cd | 39 | * Per RFC 793, September, 1981. |
| 6e8b2eca | 40 | */ |
| eb44bfb2 BJ |
41 | struct tcphdr { |
| 42 | u_short th_sport; /* source port */ | |
| 43 | u_short th_dport; /* destination port */ | |
| 8a13b737 BJ |
44 | tcp_seq th_seq; /* sequence number */ |
| 45 | tcp_seq th_ack; /* acknowledgement number */ | |
| ca67e7b4 | 46 | #if BYTE_ORDER == LITTLE_ENDIAN |
| 498aff44 | 47 | u_char th_x2:4, /* (unused) */ |
| eb44bfb2 | 48 | th_off:4; /* data offset */ |
| f112c673 | 49 | #endif |
| ca67e7b4 | 50 | #if BYTE_ORDER == BIG_ENDIAN |
| f112c673 MK |
51 | u_char th_off:4, /* data offset */ |
| 52 | th_x2:4; /* (unused) */ | |
| 498aff44 | 53 | #endif |
| a3d78bbd | 54 | u_char th_flags; |
| 2ff61f9d BJ |
55 | #define TH_FIN 0x01 |
| 56 | #define TH_SYN 0x02 | |
| 57 | #define TH_RST 0x04 | |
| 58 | #define TH_PUSH 0x08 | |
| 59 | #define TH_ACK 0x10 | |
| 60 | #define TH_URG 0x20 | |
| eb44bfb2 BJ |
61 | u_short th_win; /* window */ |
| 62 | u_short th_sum; /* checksum */ | |
| 63 | u_short th_urp; /* urgent pointer */ | |
| 121f5f3a | 64 | }; |
| 8b5a83bb | 65 | |
| 69d96ae2 AC |
66 | #define TCPOPT_EOL 0 |
| 67 | #define TCPOPT_NOP 1 | |
| 68 | #define TCPOPT_MAXSEG 2 | |
| 69 | #define TCPOLEN_MAXSEG 4 | |
| 70 | #define TCPOPT_WINDOW 3 | |
| 71 | #define TCPOLEN_WINDOW 3 | |
| 72 | #define TCPOPT_SACK_PERMITTED 4 /* Experimental */ | |
| 73 | #define TCPOLEN_SACK_PERMITTED 2 | |
| 74 | #define TCPOPT_SACK 5 /* Experimental */ | |
| 75 | #define TCPOPT_TIMESTAMP 8 | |
| 76 | #define TCPOLEN_TIMESTAMP 10 | |
| 77 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ | |
| 78 | ||
| 79 | #define TCPOPT_TSTAMP_HDR \ | |
| 80 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) | |
| 0d115dcc MK |
81 | |
| 82 | /* | |
| f8a0cae6 MK |
83 | * Default maximum segment size for TCP. |
| 84 | * With an IP MSS of 576, this is 536, | |
| 85 | * but 512 is probably more convenient. | |
| a6030a98 | 86 | * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). |
| 0d115dcc | 87 | */ |
| a6030a98 MK |
88 | #define TCP_MSS 512 |
| 89 | ||
| 69d96ae2 AC |
90 | #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ |
| 91 | ||
| 92 | #define TCP_MAX_WINSHIFT 14 /* maximum window shift */ | |
| 946f1634 MK |
93 | |
| 94 | /* | |
| 95 | * User-settable options (used with setsockopt). | |
| 96 | */ | |
| 97 | #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ | |
| 98 | #define TCP_MAXSEG 0x02 /* set maximum segment size */ |