| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /** @file
|
| 2 | Declarations for TCP.
|
| 3 |
|
| 4 | Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
|
| 5 | This program and the accompanying materials are licensed and made available under
|
| 6 | the terms and conditions of the BSD License that accompanies this distribution.
|
| 7 | The full text of the license may be found at
|
| 8 | http://opensource.org/licenses/bsd-license.
|
| 9 |
|
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
| 12 |
|
| 13 | * Copyright (c) 1982, 1986, 1993
|
| 14 | * The Regents of the University of California. All rights reserved.
|
| 15 | *
|
| 16 | * Redistribution and use in source and binary forms, with or without
|
| 17 | * modification, are permitted provided that the following conditions
|
| 18 | * are met:
|
| 19 | * 1. Redistributions of source code must retain the above copyright
|
| 20 | * notice, this list of conditions and the following disclaimer.
|
| 21 | * 2. Redistributions in binary form must reproduce the above copyright
|
| 22 | * notice, this list of conditions and the following disclaimer in the
|
| 23 | * documentation and/or other materials provided with the distribution.
|
| 24 | * 3. Neither the name of the University nor the names of its contributors
|
| 25 | * may be used to endorse or promote products derived from this software
|
| 26 | * without specific prior written permission.
|
| 27 | *
|
| 28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
| 29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
| 32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 38 | * SUCH DAMAGE.
|
| 39 | *
|
| 40 | * @(#)tcp.h 8.1 (Berkeley) 6/10/93
|
| 41 | NetBSD: tcp.h,v 1.28 2007/12/25 18:33:47 perry Exp
|
| 42 | */
|
| 43 | #ifndef _NETINET_TCP_H_
|
| 44 | #define _NETINET_TCP_H_
|
| 45 |
|
| 46 | #include <sys/featuretest.h>
|
| 47 |
|
| 48 | typedef u_int32_t tcp_seq;
|
| 49 |
|
| 50 | /* Flag definitions for tcphdr.th_flags */
|
| 51 | #define TH_FIN 0x01
|
| 52 | #define TH_SYN 0x02
|
| 53 | #define TH_RST 0x04
|
| 54 | #define TH_PUSH 0x08
|
| 55 | #define TH_ACK 0x10
|
| 56 | #define TH_URG 0x20
|
| 57 | #define TH_ECE 0x40
|
| 58 | #define TH_CWR 0x80
|
| 59 |
|
| 60 | #pragma pack(1)
|
| 61 | /*
|
| 62 | * TCP header.
|
| 63 | * Per RFC 793, September, 1981.
|
| 64 | * Updated by RFC 3168, September, 2001.
|
| 65 | */
|
| 66 | struct tcphdr {
|
| 67 | u_int16_t th_sport; /* source port */
|
| 68 | u_int16_t th_dport; /* destination port */
|
| 69 | tcp_seq th_seq; /* sequence number */
|
| 70 | tcp_seq th_ack; /* acknowledgement number */
|
| 71 | #if BYTE_ORDER == LITTLE_ENDIAN
|
| 72 | /*LINTED non-portable bitfields*/
|
| 73 | u_int8_t th_x2:4, /* (unused) */
|
| 74 | th_off:4; /* data offset */
|
| 75 | #endif
|
| 76 | #if BYTE_ORDER == BIG_ENDIAN
|
| 77 | /*LINTED non-portable bitfields*/
|
| 78 | u_int8_t th_off:4, /* data offset */
|
| 79 | th_x2:4; /* (unused) */
|
| 80 | #endif
|
| 81 | u_int8_t th_flags;
|
| 82 | u_int16_t th_win; /* window */
|
| 83 | u_int16_t th_sum; /* checksum */
|
| 84 | u_int16_t th_urp; /* urgent pointer */
|
| 85 | };
|
| 86 | #pragma pack()
|
| 87 |
|
| 88 | #define TCPOPT_EOL 0
|
| 89 | #define TCPOPT_NOP 1
|
| 90 | #define TCPOPT_MAXSEG 2
|
| 91 | #define TCPOLEN_MAXSEG 4
|
| 92 | #define TCPOPT_WINDOW 3
|
| 93 | #define TCPOLEN_WINDOW 3
|
| 94 | #define TCPOPT_SACK_PERMITTED 4 /* Experimental */
|
| 95 | #define TCPOLEN_SACK_PERMITTED 2
|
| 96 | #define TCPOPT_SACK 5 /* Experimental */
|
| 97 | #define TCPOPT_TIMESTAMP 8
|
| 98 | #define TCPOLEN_TIMESTAMP 10
|
| 99 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
|
| 100 |
|
| 101 | #define TCPOPT_TSTAMP_HDR \
|
| 102 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
|
| 103 |
|
| 104 | #define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */
|
| 105 | #define TCPOLEN_SIGNATURE 18
|
| 106 | #define TCPOLEN_SIGLEN (TCPOLEN_SIGNATURE+2) /* padding */
|
| 107 |
|
| 108 | #define MAX_TCPOPTLEN 40 /* max # bytes that go in options */
|
| 109 |
|
| 110 | /* Default maximum segment size for TCP.
|
| 111 | * This is defined by RFC 1112 Sec 4.2.2.6.
|
| 112 | */
|
| 113 | #define TCP_MSS 536
|
| 114 |
|
| 115 | #define TCP_MINMSS 216
|
| 116 |
|
| 117 | #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
|
| 118 |
|
| 119 | #define TCP_MAX_WINSHIFT 14 /* maximum window shift */
|
| 120 |
|
| 121 | #define TCP_MAXBURST 4 /* maximum segments in a burst */
|
| 122 |
|
| 123 | /* User-settable options (used with setsockopt). */
|
| 124 | #define TCP_NODELAY 1 /* don't delay send to coalesce packets */
|
| 125 | #define TCP_MAXSEG 2 /* set maximum segment size */
|
| 126 | #define TCP_KEEPIDLE 3
|
| 127 |
|
| 128 | #ifdef notyet
|
| 129 | #define TCP_NOPUSH 4 /* reserved for FreeBSD compat */
|
| 130 | #endif
|
| 131 |
|
| 132 | #define TCP_KEEPINTVL 5
|
| 133 | #define TCP_KEEPCNT 6
|
| 134 | #define TCP_KEEPINIT 7
|
| 135 |
|
| 136 | #ifdef notyet
|
| 137 | #define TCP_NOOPT 8 /* reserved for FreeBSD compat */
|
| 138 | #endif
|
| 139 |
|
| 140 | #define TCP_MD5SIG 0x10 /* use MD5 digests (RFC2385) */
|
| 141 | #define TCP_CONGCTL 0x20 /* selected congestion control */
|
| 142 |
|
| 143 | #endif /* !_NETINET_TCP_H_ */
|