| 1 | /* Modified for emx by hv 1996
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| 2 | * Modified for gcc/os2 by bird 2003
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| 3 | *
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| 4 | * Copyright (c) 1982, 1986 Regents of the University of California.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. All advertising materials mentioning features or use of this software
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| 16 | * must display the following acknowledgement:
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| 17 | * This product includes software developed by the University of
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| 18 | * California, Berkeley and its contributors.
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| 19 | * 4. Neither the name of the University nor the names of its contributors
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| 20 | * may be used to endorse or promote products derived from this software
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| 21 | * without specific prior written permission.
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | * SUCH DAMAGE.
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| 34 | *
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| 35 | * from: @(#)tcp.h 7.7 (Berkeley) 6/28/90
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| 36 | * $Id: tcp.h,v 1.4 1994/01/08 21:21:56 mycroft Exp $
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| 37 | */
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| 38 |
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| 39 | #ifndef _NETINET_TCP_H_
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| 40 | #define _NETINET_TCP_H_
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| 41 |
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| 42 | #include <machine/endian.h>
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| 43 |
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| 44 | typedef u_long tcp_seq;
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| 45 | /*
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| 46 | * TCP header.
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| 47 | * Per RFC 793, September, 1981.
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| 48 | */
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| 49 | #pragma pack(1)
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| 50 | struct tcphdr {
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| 51 | u_short th_sport; /* source port */
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| 52 | u_short th_dport; /* destination port */
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| 53 | tcp_seq th_seq; /* sequence number */
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| 54 | tcp_seq th_ack; /* acknowledgement number */
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| 55 | #ifdef TCPV40HDRS
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| 56 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 57 | u_int th_x2:4, /* (unused) */
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| 58 | th_off:4, /* data offset */
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| 59 | th_flags:8,
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| 60 | th_win:16;
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| 61 | #endif
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| 62 | #if BYTE_ORDER == BIG_ENDIAN
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| 63 | u_int th_win:16,
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| 64 | th_flags:8,
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| 65 | th_off:4, /* data offset */
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| 66 | th_x2:4; /* (unused) */
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| 67 | #endif
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| 68 | #define TH_FIN 0x01
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| 69 | #define TH_SYN 0x02
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| 70 | #define TH_RST 0x04
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| 71 | #define TH_PUSH 0x08
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| 72 | #define TH_ACK 0x10
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| 73 | #define TH_URG 0x20
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| 74 | #else
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| 75 | #if BYTE_ORDER == LITTLE_ENDIAN
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| 76 | u_char th_x2:4, /* (unused) */
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| 77 | th_off:4; /* data offset */
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| 78 | #endif
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| 79 | #if BYTE_ORDER == BIG_ENDIAN
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| 80 | u_char th_off:4, /* data offset */
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| 81 | th_x2:4; /* (unused) */
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| 82 | #endif
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| 83 | u_char th_flags;
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| 84 | #define TH_FIN 0x01
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| 85 | #define TH_SYN 0x02
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| 86 | #define TH_RST 0x04
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| 87 | #define TH_PUSH 0x08
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| 88 | #define TH_ACK 0x10
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| 89 | #define TH_URG 0x20
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| 90 | u_short th_win; /* window */
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| 91 | #endif
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| 92 | u_short th_sum; /* checksum */
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| 93 | u_short th_urp; /* urgent pointer */
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| 94 | };
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| 95 | #pragma pack()
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| 96 |
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| 97 | #define TCPOPT_EOL 0
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| 98 | #define TCPOPT_NOP 1
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| 99 | #define TCPOPT_MAXSEG 2
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| 100 | #ifndef TCPV40HDRS
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| 101 | #define TCPOLEN_MAXSEG 4
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| 102 | #define TCPOPT_WINDOW 3
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| 103 | #define TCPOLEN_WINDOW 3
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| 104 | #define TCPOPT_SACK_PERMITTED 4 /* Experimental */
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| 105 | #define TCPOLEN_SACK_PERMITTED 2
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| 106 | #define TCPOPT_SACK 5 /* Experimental */
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| 107 | #define TCPOPT_TIMESTAMP 8
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| 108 | #define TCPOLEN_TIMESTAMP 10
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| 109 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
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| 110 |
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| 111 | #define TCPOPT_CC 11 /* CC options: RFC-1644 */
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| 112 | #define TCPOPT_CCNEW 12
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| 113 | #define TCPOPT_CCECHO 13
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| 114 | #define TCPOLEN_CC 6
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| 115 | #define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
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| 116 | #define TCPOPT_CC_HDR(ccopt) \
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| 117 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
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| 118 | #define TTCP_CLIENT_SND_WND 4096 /* dflt send window of ttcp client */
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| 119 | #define TCPOPT_TSTAMP_HDR \
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| 120 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
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| 121 | #endif /*!TCPV40HDRS*/
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| 122 |
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| 123 | /*
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| 124 | * Default maximum segment size for TCP.
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| 125 | * With an IP MSS of 576, this is 536,
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| 126 | * but 512 is probably more convenient.
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| 127 | * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
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| 128 | */
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| 129 | #ifdef TCPV40HDRS
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| 130 | #ifdef lint
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| 131 | #define TCP_MSS 536
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| 132 | #else
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| 133 | #ifndef IP_MSS
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| 134 | #define IP_MSS 576
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| 135 | #endif
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| 136 | #define TCP_MSS MIN(512, IP_MSS - 40)
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| 137 | #endif
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| 138 | #else /* TCPV40HDRS*/
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| 139 | #define TCP_MSS 512
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| 140 | #endif
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| 141 |
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| 142 | #define TCP_MAXWIN 65535 /* largest value for window */
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| 143 |
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| 144 | #ifndef TCPV40HDRS
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| 145 | #define TCP_MAX_WINSHIFT 14 /* maximum window shift */
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| 146 | #endif
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| 147 |
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| 148 | /*
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| 149 | * User-settable options (used with setsockopt).
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| 150 | */
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| 151 | #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
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| 152 | #define TCP_MAXSEG 0x02 /* set maximum segment size */
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| 153 | #ifndef TCPV40HDRS
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| 154 | #define TCP_MSL 0x03 /* MSL HACK */
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| 155 | #define TCP_TIMESTMP 0x04 /* RFC 1323 (RTTM TimeStamp) */
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| 156 | #define TCP_WINSCALE 0x05 /* RFC 1323 (Window Scale) */
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| 157 | #define TCP_CC 0x06 /* RFC 1644 (Connection Count) */
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| 158 | #ifdef VEGAS
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| 159 | #define TCP_TAHOE 3
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| 160 | #define TCP_RENO 4
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| 161 | #define TCP_VEGAS 5
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| 162 | #define TCP_VEGAS_SPIKE_ON 6
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| 163 | #define TCP_VEGAS_EXP_INC_OFF 7
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| 164 | #define TCP_VEGAS_CONG_DETECT_OFF 8
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| 165 | #define TCP_VEGAS_24 9
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| 166 | #define TCP_VEGAS_CONG_DETECT_PRED_ON 10
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| 167 | #endif
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| 168 | #endif /*!TCPV40HDS*/
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| 169 |
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| 170 | #ifdef TCPV40HDRS
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| 171 | #include <netinet/tcp_var.h>
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| 172 | #endif
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| 173 |
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| 174 | #endif /* !_NETINET_TCP_H_ */
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