| 1 |
27 |
unneback |
//==========================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// include/netinet/tcp.h
|
| 4 |
|
|
//
|
| 5 |
|
|
//==========================================================================
|
| 6 |
|
|
//####BSDCOPYRIGHTBEGIN####
|
| 7 |
|
|
//
|
| 8 |
|
|
// -------------------------------------------
|
| 9 |
|
|
//
|
| 10 |
|
|
// Portions of this software may have been derived from OpenBSD,
|
| 11 |
|
|
// FreeBSD or other sources, and are covered by the appropriate
|
| 12 |
|
|
// copyright disclaimers included herein.
|
| 13 |
|
|
//
|
| 14 |
|
|
// Portions created by Red Hat are
|
| 15 |
|
|
// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
|
| 16 |
|
|
//
|
| 17 |
|
|
// -------------------------------------------
|
| 18 |
|
|
//
|
| 19 |
|
|
//####BSDCOPYRIGHTEND####
|
| 20 |
|
|
//==========================================================================
|
| 21 |
|
|
|
| 22 |
|
|
/*
|
| 23 |
|
|
* Copyright (c) 1982, 1986, 1993
|
| 24 |
|
|
* The Regents of the University of California. All rights reserved.
|
| 25 |
|
|
*
|
| 26 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 27 |
|
|
* modification, are permitted provided that the following conditions
|
| 28 |
|
|
* are met:
|
| 29 |
|
|
* 1. Redistributions of source code must retain the above copyright
|
| 30 |
|
|
* notice, this list of conditions and the following disclaimer.
|
| 31 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
| 32 |
|
|
* notice, this list of conditions and the following disclaimer in the
|
| 33 |
|
|
* documentation and/or other materials provided with the distribution.
|
| 34 |
|
|
* 3. All advertising materials mentioning features or use of this software
|
| 35 |
|
|
* must display the following acknowledgement:
|
| 36 |
|
|
* This product includes software developed by the University of
|
| 37 |
|
|
* California, Berkeley and its contributors.
|
| 38 |
|
|
* 4. Neither the name of the University nor the names of its contributors
|
| 39 |
|
|
* may be used to endorse or promote products derived from this software
|
| 40 |
|
|
* without specific prior written permission.
|
| 41 |
|
|
*
|
| 42 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
| 43 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 44 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 45 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
| 46 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 47 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 48 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 49 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 50 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 51 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 52 |
|
|
* SUCH DAMAGE.
|
| 53 |
|
|
*
|
| 54 |
|
|
* @(#)tcp.h 8.1 (Berkeley) 6/10/93
|
| 55 |
|
|
* $FreeBSD: src/sys/netinet/tcp.h,v 1.13.2.3 2001/03/01 22:08:42 jlemon Exp $
|
| 56 |
|
|
*/
|
| 57 |
|
|
|
| 58 |
|
|
#ifndef _NETINET_TCP_H_
|
| 59 |
|
|
#define _NETINET_TCP_H_
|
| 60 |
|
|
|
| 61 |
|
|
typedef u_int32_t tcp_seq;
|
| 62 |
|
|
typedef u_int32_t tcp_cc; /* connection count per rfc1644 */
|
| 63 |
|
|
|
| 64 |
|
|
#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */
|
| 65 |
|
|
#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */
|
| 66 |
|
|
|
| 67 |
|
|
/*
|
| 68 |
|
|
* TCP header.
|
| 69 |
|
|
* Per RFC 793, September, 1981.
|
| 70 |
|
|
*/
|
| 71 |
|
|
struct tcphdr {
|
| 72 |
|
|
u_short th_sport; /* source port */
|
| 73 |
|
|
u_short th_dport; /* destination port */
|
| 74 |
|
|
tcp_seq th_seq; /* sequence number */
|
| 75 |
|
|
tcp_seq th_ack; /* acknowledgement number */
|
| 76 |
|
|
#if BYTE_ORDER == LITTLE_ENDIAN
|
| 77 |
|
|
u_int th_x2:4, /* (unused) */
|
| 78 |
|
|
th_off:4; /* data offset */
|
| 79 |
|
|
#endif
|
| 80 |
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
| 81 |
|
|
u_int th_off:4, /* data offset */
|
| 82 |
|
|
th_x2:4; /* (unused) */
|
| 83 |
|
|
#endif
|
| 84 |
|
|
u_char th_flags;
|
| 85 |
|
|
#define TH_FIN 0x01
|
| 86 |
|
|
#define TH_SYN 0x02
|
| 87 |
|
|
#define TH_RST 0x04
|
| 88 |
|
|
#define TH_PUSH 0x08
|
| 89 |
|
|
#define TH_ACK 0x10
|
| 90 |
|
|
#define TH_URG 0x20
|
| 91 |
|
|
#define TH_ECE 0x40
|
| 92 |
|
|
#define TH_CWR 0x80
|
| 93 |
|
|
#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
|
| 94 |
|
|
|
| 95 |
|
|
u_short th_win; /* window */
|
| 96 |
|
|
u_short th_sum; /* checksum */
|
| 97 |
|
|
u_short th_urp; /* urgent pointer */
|
| 98 |
|
|
} __attribute__ ((aligned(1), packed));
|
| 99 |
|
|
|
| 100 |
|
|
#define TCPOPT_EOL 0
|
| 101 |
|
|
#define TCPOPT_NOP 1
|
| 102 |
|
|
#define TCPOPT_MAXSEG 2
|
| 103 |
|
|
#define TCPOLEN_MAXSEG 4
|
| 104 |
|
|
#define TCPOPT_WINDOW 3
|
| 105 |
|
|
#define TCPOLEN_WINDOW 3
|
| 106 |
|
|
#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
|
| 107 |
|
|
#define TCPOLEN_SACK_PERMITTED 2
|
| 108 |
|
|
#define TCPOPT_SACK 5 /* Experimental */
|
| 109 |
|
|
#define TCPOPT_TIMESTAMP 8
|
| 110 |
|
|
#define TCPOLEN_TIMESTAMP 10
|
| 111 |
|
|
#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
|
| 112 |
|
|
#define TCPOPT_TSTAMP_HDR \
|
| 113 |
|
|
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
|
| 114 |
|
|
|
| 115 |
|
|
#define TCPOPT_CC 11 /* CC options: RFC-1644 */
|
| 116 |
|
|
#define TCPOPT_CCNEW 12
|
| 117 |
|
|
#define TCPOPT_CCECHO 13
|
| 118 |
|
|
#define TCPOLEN_CC 6
|
| 119 |
|
|
#define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
|
| 120 |
|
|
#define TCPOPT_CC_HDR(ccopt) \
|
| 121 |
|
|
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
|
| 122 |
|
|
|
| 123 |
|
|
/*
|
| 124 |
|
|
* Default maximum segment size for TCP.
|
| 125 |
|
|
* With an IP MSS of 576, this is 536,
|
| 126 |
|
|
* but 512 is probably more convenient.
|
| 127 |
|
|
* This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
|
| 128 |
|
|
*/
|
| 129 |
|
|
#define TCP_MSS 512
|
| 130 |
|
|
|
| 131 |
|
|
/*
|
| 132 |
|
|
* Default maximum segment size for TCP6.
|
| 133 |
|
|
* With an IP6 MSS of 1280, this is 1220,
|
| 134 |
|
|
* but 1024 is probably more convenient. (xxx kazu in doubt)
|
| 135 |
|
|
* This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr))
|
| 136 |
|
|
*/
|
| 137 |
|
|
#define TCP6_MSS 1024
|
| 138 |
|
|
|
| 139 |
|
|
#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
|
| 140 |
|
|
#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
|
| 141 |
|
|
|
| 142 |
|
|
#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
|
| 143 |
|
|
|
| 144 |
|
|
#define TCP_MAXBURST 4 /* maximum segments in a burst */
|
| 145 |
|
|
|
| 146 |
|
|
#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
|
| 147 |
|
|
#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
|
| 148 |
|
|
/* max space left for options */
|
| 149 |
|
|
|
| 150 |
|
|
/*
|
| 151 |
|
|
* User-settable options (used with setsockopt).
|
| 152 |
|
|
*/
|
| 153 |
|
|
#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
|
| 154 |
|
|
#define TCP_MAXSEG 0x02 /* set maximum segment size */
|
| 155 |
|
|
#define TCP_NOPUSH 0x04 /* don't push last block of write */
|
| 156 |
|
|
#define TCP_NOOPT 0x08 /* don't use TCP options */
|
| 157 |
|
|
|
| 158 |
|
|
#endif
|
