| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 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 | #include <sys/appleapiopts.h> |
| | 61 | |
| | 62 | typedef u_int32_t tcp_seq; |
| | 63 | typedef u_int32_t tcp_cc; /* connection count per rfc1644 */ |
| | 64 | |
| | 65 | #define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */ |
| | 66 | #define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */ |
| | 67 | |
| | 68 | /* |
| | 69 | * TCP header. |
| | 70 | * Per RFC 793, September, 1981. |
| | 71 | */ |
| | 72 | struct tcphdr { |
| | 73 | u_short th_sport; /* source port */ |
| | 74 | u_short th_dport; /* destination port */ |
| | 75 | tcp_seq th_seq; /* sequence number */ |
| | 76 | tcp_seq th_ack; /* acknowledgement number */ |
| | 77 | #if BYTE_ORDER == LITTLE_ENDIAN |
| | 78 | u_int th_x2:4, /* (unused) */ |
| | 79 | th_off:4; /* data offset */ |
| | 80 | #endif |
| | 81 | #if BYTE_ORDER == BIG_ENDIAN |
| | 82 | u_int th_off:4, /* data offset */ |
| | 83 | th_x2:4; /* (unused) */ |
| | 84 | #endif |
| | 85 | u_char th_flags; |
| | 86 | #define TH_FIN 0x01 |
| | 87 | #define TH_SYN 0x02 |
| | 88 | #define TH_RST 0x04 |
| | 89 | #define TH_PUSH 0x08 |
| | 90 | #define TH_ACK 0x10 |
| | 91 | #define TH_URG 0x20 |
| | 92 | #define TH_ECE 0x40 |
| | 93 | #define TH_CWR 0x80 |
| | 94 | #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR) |
| | 95 | |
| | 96 | u_short th_win; /* window */ |
| | 97 | u_short th_sum; /* checksum */ |
| | 98 | u_short th_urp; /* urgent pointer */ |
| | 99 | }; |
| | 100 | |
| | 101 | #define TCPOPT_EOL 0 |
| | 102 | #define TCPOPT_NOP 1 |
| | 103 | #define TCPOPT_MAXSEG 2 |
| | 104 | #define TCPOLEN_MAXSEG 4 |
| | 105 | #define TCPOPT_WINDOW 3 |
| | 106 | #define TCPOLEN_WINDOW 3 |
| | 107 | #define TCPOPT_SACK_PERMITTED 4 /* Experimental */ |
| | 108 | #define TCPOLEN_SACK_PERMITTED 2 |
| | 109 | #define TCPOPT_SACK 5 /* Experimental */ |
| | 110 | #define TCPOPT_TIMESTAMP 8 |
| | 111 | #define TCPOLEN_TIMESTAMP 10 |
| | 112 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ |
| | 113 | #define TCPOPT_TSTAMP_HDR \ |
| | 114 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) |
| | 115 | |
| | 116 | #define TCPOPT_CC 11 /* CC options: RFC-1644 */ |
| | 117 | #define TCPOPT_CCNEW 12 |
| | 118 | #define TCPOPT_CCECHO 13 |
| | 119 | #define TCPOLEN_CC 6 |
| | 120 | #define TCPOLEN_CC_APPA (TCPOLEN_CC+2) |
| | 121 | #define TCPOPT_CC_HDR(ccopt) \ |
| | 122 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC) |
| | 123 | |
| | 124 | /* |
| | 125 | * Default maximum segment size for TCP. |
| | 126 | * With an IP MSS of 576, this is 536, |
| | 127 | * but 512 is probably more convenient. |
| | 128 | * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). |
| | 129 | */ |
| | 130 | #define TCP_MSS 512 |
| | 131 | |
| | 132 | /* |
| | 133 | * Default maximum segment size for TCP6. |
| | 134 | * With an IP6 MSS of 1280, this is 1220, |
| | 135 | * but 1024 is probably more convenient. (xxx kazu in doubt) |
| | 136 | * This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr)) |
| | 137 | */ |
| | 138 | #define TCP6_MSS 1024 |
| | 139 | |
| | 140 | #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ |
| | 141 | #define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ |
| | 142 | |
| | 143 | #define TCP_MAX_WINSHIFT 14 /* maximum window shift */ |
| | 144 | |
| | 145 | #define TCP_MAXBURST 4 /* maximum segments in a burst */ |
| | 146 | |
| | 147 | #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ |
| | 148 | #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) |
| | 149 | /* max space left for options */ |
| | 150 | |
| | 151 | /* |
| | 152 | * User-settable options (used with setsockopt). |
| | 153 | */ |
| | 154 | #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ |
| | 155 | #define TCP_MAXSEG 0x02 /* set maximum segment size */ |
| | 156 | #define TCP_NOPUSH 0x04 /* don't push last block of write */ |
| | 157 | #define TCP_NOOPT 0x08 /* don't use TCP options */ |
| | 158 | |
| | 159 | #endif |
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