| | 1 | /* |
| | 2 | * Copyright (c) 1982, 1986, 1993 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 4 | * |
| | 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. |
| | 20 | * |
| | 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 |
| | 34 | * $FreeBSD: src/sys/netinet/tcp.h,v 1.13.2.3 2001/03/01 22:08:42 jlemon Exp $ |
| | 35 | */ |
| | 36 | |
| | 37 | #ifndef _NETINET_TCP_H_ |
| | 38 | #define _NETINET_TCP_H_ |
| | 39 | |
| | 40 | #ifndef _SYS_TYPES_H_ |
| | 41 | #include <sys/types.h> |
| | 42 | #endif |
| | 43 | #include <machine/endian.h> |
| | 44 | |
| | 45 | typedef u_int32_t tcp_seq; |
| | 46 | typedef int32_t tcp_seq_diff_t; |
| | 47 | |
| | 48 | #define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */ |
| | 49 | #define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */ |
| | 50 | |
| | 51 | /* |
| | 52 | * TCP header. |
| | 53 | * Per RFC 793, September, 1981. |
| | 54 | */ |
| | 55 | struct tcphdr { |
| | 56 | u_short th_sport; /* source port */ |
| | 57 | u_short th_dport; /* destination port */ |
| | 58 | tcp_seq th_seq; /* sequence number */ |
| | 59 | tcp_seq th_ack; /* acknowledgement number */ |
| | 60 | #if _BYTE_ORDER == _LITTLE_ENDIAN |
| | 61 | u_int th_x2:4, /* (unused) */ |
| | 62 | th_off:4; /* data offset */ |
| | 63 | #elif _BYTE_ORDER == _BIG_ENDIAN |
| | 64 | u_int th_off:4, /* data offset */ |
| | 65 | th_x2:4; /* (unused) */ |
| | 66 | #else |
| | 67 | #error "Byte order not implemented" |
| | 68 | #endif |
| | 69 | u_char th_flags; |
| | 70 | #define TH_FIN 0x01 |
| | 71 | #define TH_SYN 0x02 |
| | 72 | #define TH_RST 0x04 |
| | 73 | #define TH_PUSH 0x08 |
| | 74 | #define TH_ACK 0x10 |
| | 75 | #define TH_URG 0x20 |
| | 76 | #define TH_ECE 0x40 |
| | 77 | #define TH_CWR 0x80 |
| | 78 | #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR) |
| | 79 | |
| | 80 | u_short th_win; /* window */ |
| | 81 | u_short th_sum; /* checksum */ |
| | 82 | u_short th_urp; /* urgent pointer */ |
| | 83 | }; |
| | 84 | |
| | 85 | #define TCPOPT_EOL 0 |
| | 86 | #define TCPOPT_NOP 1 |
| | 87 | #define TCPOPT_2NOPs (TCPOPT_NOP << 24 | TCPOPT_NOP << 16) |
| | 88 | #define TCPOPT_MAXSEG 2 |
| | 89 | #define TCPOLEN_MAXSEG 4 |
| | 90 | #define TCPOPT_WINDOW 3 |
| | 91 | #define TCPOLEN_WINDOW 3 |
| | 92 | #define TCPOPT_SACK_PERMITTED 4 |
| | 93 | #define TCPOLEN_SACK_PERMITTED 2 |
| | 94 | #define TCPOPT_SACK_PERMITTED_ALIGNED \ |
| | 95 | (TCPOPT_2NOPs | TCPOPT_SACK_PERMITTED << 8 | TCPOLEN_SACK_PERMITTED) |
| | 96 | #define TCPOLEN_SACK_PERMITTED_ALIGNED 4 |
| | 97 | #define TCPOPT_SACK 5 |
| | 98 | #define TCPOLEN_SACK 2 |
| | 99 | #define TCPOLEN_SACK_BLOCK 8 |
| | 100 | #define TCPOPT_SACK_ALIGNED (TCPOPT_2NOPs | TCPOPT_SACK << 8) |
| | 101 | #define TCPOLEN_SACK_ALIGNED 4 |
| | 102 | #define TCPOPT_TIMESTAMP 8 |
| | 103 | #define TCPOLEN_TIMESTAMP 10 |
| | 104 | #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ |
| | 105 | #define TCPOPT_TSTAMP_HDR \ |
| | 106 | (TCPOPT_2NOPs | TCPOPT_TIMESTAMP << 8 | TCPOLEN_TIMESTAMP) |
| | 107 | #define TCPOPT_CC 11 /* CC options: RFC-1644 */ |
| | 108 | #define TCPOPT_CCNEW 12 |
| | 109 | #define TCPOPT_CCECHO 13 |
| | 110 | #define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */ |
| | 111 | #define TCPOLEN_SIGNATURE 18 |
| | 112 | |
| | 113 | /* |
| | 114 | * Default maximum segment size for TCP. |
| | 115 | * With an IP MSS of 576, this is 536, |
| | 116 | * but 512 is probably more convenient. |
| | 117 | * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). |
| | 118 | */ |
| | 119 | #define TCP_MSS 512 |
| | 120 | |
| | 121 | /* |
| | 122 | * TCP_MINMSS is defined to be 256 which is fine for the smallest |
| | 123 | * link MTU (296 bytes, SLIP interface) in the Internet. |
| | 124 | * However it is very unlikely to come across such low MTU interfaces |
| | 125 | * these days (anno dato 2003). |
| | 126 | * Probably it can be set to 512 without ill effects. But we play safe. |
| | 127 | * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments. |
| | 128 | * Setting this to "0" disables the minmss check. |
| | 129 | */ |
| | 130 | #define TCP_MINMSS 256 |
| | 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 | * NOTE: TCP_MIN_WINSHIFT is used when negotiating window scaling. Larger |
| | 139 | * values are possible but apparently some firewires blows up if |
| | 140 | * values larger then 5 are used, so use 5. |
| | 141 | */ |
| | 142 | #define TCP6_MSS 1024 |
| | 143 | |
| | 144 | #define TCP_MAXWIN 65535 /* max value for (unscaled) window */ |
| | 145 | |
| | 146 | #define TCP_MIN_WINSHIFT 5 /* requested minimum (x32) */ |
| | 147 | #define TCP_MAX_WINSHIFT 14 /* maximum window shift */ |
| | 148 | |
| | 149 | #define TCP_MAXBURST 4 /* maximum segments in a burst */ |
| | 150 | |
| | 151 | #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ |
| | 152 | #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) |
| | 153 | /* max space left for options */ |
| | 154 | |
| | 155 | /* |
| | 156 | * User-settable options (used with setsockopt). |
| | 157 | */ |
| | 158 | #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ |
| | 159 | #define TCP_MAXSEG 0x02 /* set maximum segment size */ |
| | 160 | #define TCP_NOPUSH 0x04 /* don't push last block of write */ |
| | 161 | #define TCP_NOOPT 0x08 /* don't use TCP options */ |
| | 162 | #define TCP_SIGNATURE_ENABLE 0x10 /* use MD5 digests (RFC2385) */ |
| | 163 | #define TCP_KEEPINIT 0x20 |
| | 164 | /* 0x40 unused */ |
| | 165 | #define TCP_FASTKEEP 0x80 |
| | 166 | #define TCP_KEEPIDLE 0x100 |
| | 167 | #define TCP_KEEPINTVL 0x200 |
| | 168 | #define TCP_KEEPCNT 0x400 |
| | 169 | |
| | 170 | #endif |
projects / dragonfly.git / blame_incremental