Zach Pfeffer | b4bd0c6 | 2012-10-09 11:25:45 -0500 | [diff] [blame^] | 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 | * 4. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * @(#)tcp.h 8.1 (Berkeley) 6/10/93 |
| 30 | */ |
| 31 | |
| 32 | #ifndef _NETINET_TCP_H |
| 33 | #define _NETINET_TCP_H 1 |
| 34 | |
| 35 | #include <features.h> |
| 36 | |
| 37 | /* |
| 38 | * User-settable options (used with setsockopt). |
| 39 | */ |
| 40 | #define TCP_NODELAY 1 /* Don't delay send to coalesce packets */ |
| 41 | #define TCP_MAXSEG 2 /* Set maximum segment size */ |
| 42 | #define TCP_CORK 3 /* Control sending of partial frames */ |
| 43 | #define TCP_KEEPIDLE 4 /* Start keeplives after this period */ |
| 44 | #define TCP_KEEPINTVL 5 /* Interval between keepalives */ |
| 45 | #define TCP_KEEPCNT 6 /* Number of keepalives before death */ |
| 46 | #define TCP_SYNCNT 7 /* Number of SYN retransmits */ |
| 47 | #define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */ |
| 48 | #define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */ |
| 49 | #define TCP_WINDOW_CLAMP 10 /* Bound advertised window */ |
| 50 | #define TCP_INFO 11 /* Information about this connection. */ |
| 51 | #define TCP_QUICKACK 12 /* Bock/reenable quick ACKs. */ |
| 52 | #define TCP_CONGESTION 13 /* Congestion control algorithm. */ |
| 53 | #define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */ |
| 54 | |
| 55 | #ifdef __USE_MISC |
| 56 | # include <sys/types.h> |
| 57 | # include <sys/socket.h> |
| 58 | |
| 59 | # ifdef __FAVOR_BSD |
| 60 | typedef u_int32_t tcp_seq; |
| 61 | /* |
| 62 | * TCP header. |
| 63 | * Per RFC 793, September, 1981. |
| 64 | */ |
| 65 | struct tcphdr |
| 66 | { |
| 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 | u_int8_t th_x2:4; /* (unused) */ |
| 73 | u_int8_t th_off:4; /* data offset */ |
| 74 | # endif |
| 75 | # if __BYTE_ORDER == __BIG_ENDIAN |
| 76 | u_int8_t th_off:4; /* data offset */ |
| 77 | u_int8_t th_x2:4; /* (unused) */ |
| 78 | # endif |
| 79 | u_int8_t th_flags; |
| 80 | # define TH_FIN 0x01 |
| 81 | # define TH_SYN 0x02 |
| 82 | # define TH_RST 0x04 |
| 83 | # define TH_PUSH 0x08 |
| 84 | # define TH_ACK 0x10 |
| 85 | # define TH_URG 0x20 |
| 86 | u_int16_t th_win; /* window */ |
| 87 | u_int16_t th_sum; /* checksum */ |
| 88 | u_int16_t th_urp; /* urgent pointer */ |
| 89 | }; |
| 90 | |
| 91 | # else /* !__FAVOR_BSD */ |
| 92 | struct tcphdr |
| 93 | { |
| 94 | u_int16_t source; |
| 95 | u_int16_t dest; |
| 96 | u_int32_t seq; |
| 97 | u_int32_t ack_seq; |
| 98 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
| 99 | u_int16_t res1:4; |
| 100 | u_int16_t doff:4; |
| 101 | u_int16_t fin:1; |
| 102 | u_int16_t syn:1; |
| 103 | u_int16_t rst:1; |
| 104 | u_int16_t psh:1; |
| 105 | u_int16_t ack:1; |
| 106 | u_int16_t urg:1; |
| 107 | u_int16_t res2:2; |
| 108 | # elif __BYTE_ORDER == __BIG_ENDIAN |
| 109 | u_int16_t doff:4; |
| 110 | u_int16_t res1:4; |
| 111 | u_int16_t res2:2; |
| 112 | u_int16_t urg:1; |
| 113 | u_int16_t ack:1; |
| 114 | u_int16_t psh:1; |
| 115 | u_int16_t rst:1; |
| 116 | u_int16_t syn:1; |
| 117 | u_int16_t fin:1; |
| 118 | # else |
| 119 | # error "Adjust your <bits/endian.h> defines" |
| 120 | # endif |
| 121 | u_int16_t window; |
| 122 | u_int16_t check; |
| 123 | u_int16_t urg_ptr; |
| 124 | }; |
| 125 | # endif /* __FAVOR_BSD */ |
| 126 | |
| 127 | enum |
| 128 | { |
| 129 | TCP_ESTABLISHED = 1, |
| 130 | TCP_SYN_SENT, |
| 131 | TCP_SYN_RECV, |
| 132 | TCP_FIN_WAIT1, |
| 133 | TCP_FIN_WAIT2, |
| 134 | TCP_TIME_WAIT, |
| 135 | TCP_CLOSE, |
| 136 | TCP_CLOSE_WAIT, |
| 137 | TCP_LAST_ACK, |
| 138 | TCP_LISTEN, |
| 139 | TCP_CLOSING /* now a valid state */ |
| 140 | }; |
| 141 | |
| 142 | # define TCPOPT_EOL 0 |
| 143 | # define TCPOPT_NOP 1 |
| 144 | # define TCPOPT_MAXSEG 2 |
| 145 | # define TCPOLEN_MAXSEG 4 |
| 146 | # define TCPOPT_WINDOW 3 |
| 147 | # define TCPOLEN_WINDOW 3 |
| 148 | # define TCPOPT_SACK_PERMITTED 4 /* Experimental */ |
| 149 | # define TCPOLEN_SACK_PERMITTED 2 |
| 150 | # define TCPOPT_SACK 5 /* Experimental */ |
| 151 | # define TCPOPT_TIMESTAMP 8 |
| 152 | # define TCPOLEN_TIMESTAMP 10 |
| 153 | # define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ |
| 154 | |
| 155 | # define TCPOPT_TSTAMP_HDR \ |
| 156 | (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) |
| 157 | |
| 158 | /* |
| 159 | * Default maximum segment size for TCP. |
| 160 | * With an IP MSS of 576, this is 536, |
| 161 | * but 512 is probably more convenient. |
| 162 | * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). |
| 163 | */ |
| 164 | # define TCP_MSS 512 |
| 165 | |
| 166 | # define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ |
| 167 | |
| 168 | # define TCP_MAX_WINSHIFT 14 /* maximum window shift */ |
| 169 | |
| 170 | # define SOL_TCP 6 /* TCP level */ |
| 171 | |
| 172 | |
| 173 | # define TCPI_OPT_TIMESTAMPS 1 |
| 174 | # define TCPI_OPT_SACK 2 |
| 175 | # define TCPI_OPT_WSCALE 4 |
| 176 | # define TCPI_OPT_ECN 8 |
| 177 | |
| 178 | /* Values for tcpi_state. */ |
| 179 | enum tcp_ca_state |
| 180 | { |
| 181 | TCP_CA_Open = 0, |
| 182 | TCP_CA_Disorder = 1, |
| 183 | TCP_CA_CWR = 2, |
| 184 | TCP_CA_Recovery = 3, |
| 185 | TCP_CA_Loss = 4 |
| 186 | }; |
| 187 | |
| 188 | struct tcp_info |
| 189 | { |
| 190 | u_int8_t tcpi_state; |
| 191 | u_int8_t tcpi_ca_state; |
| 192 | u_int8_t tcpi_retransmits; |
| 193 | u_int8_t tcpi_probes; |
| 194 | u_int8_t tcpi_backoff; |
| 195 | u_int8_t tcpi_options; |
| 196 | u_int8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; |
| 197 | |
| 198 | u_int32_t tcpi_rto; |
| 199 | u_int32_t tcpi_ato; |
| 200 | u_int32_t tcpi_snd_mss; |
| 201 | u_int32_t tcpi_rcv_mss; |
| 202 | |
| 203 | u_int32_t tcpi_unacked; |
| 204 | u_int32_t tcpi_sacked; |
| 205 | u_int32_t tcpi_lost; |
| 206 | u_int32_t tcpi_retrans; |
| 207 | u_int32_t tcpi_fackets; |
| 208 | |
| 209 | /* Times. */ |
| 210 | u_int32_t tcpi_last_data_sent; |
| 211 | u_int32_t tcpi_last_ack_sent; /* Not remembered, sorry. */ |
| 212 | u_int32_t tcpi_last_data_recv; |
| 213 | u_int32_t tcpi_last_ack_recv; |
| 214 | |
| 215 | /* Metrics. */ |
| 216 | u_int32_t tcpi_pmtu; |
| 217 | u_int32_t tcpi_rcv_ssthresh; |
| 218 | u_int32_t tcpi_rtt; |
| 219 | u_int32_t tcpi_rttvar; |
| 220 | u_int32_t tcpi_snd_ssthresh; |
| 221 | u_int32_t tcpi_snd_cwnd; |
| 222 | u_int32_t tcpi_advmss; |
| 223 | u_int32_t tcpi_reordering; |
| 224 | |
| 225 | u_int32_t tcpi_rcv_rtt; |
| 226 | u_int32_t tcpi_rcv_space; |
| 227 | |
| 228 | u_int32_t tcpi_total_retrans; |
| 229 | }; |
| 230 | |
| 231 | |
| 232 | /* For TCP_MD5SIG socket option. */ |
| 233 | #define TCP_MD5SIG_MAXKEYLEN 80 |
| 234 | |
| 235 | struct tcp_md5sig |
| 236 | { |
| 237 | struct sockaddr_storage tcpm_addr; /* Address associated. */ |
| 238 | u_int16_t __tcpm_pad1; /* Zero. */ |
| 239 | u_int16_t tcpm_keylen; /* Key length. */ |
| 240 | u_int32_t __tcpm_pad2; /* Zero. */ |
| 241 | u_int8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* Key (binary). */ |
| 242 | }; |
| 243 | |
| 244 | #endif /* Misc. */ |
| 245 | |
| 246 | #endif /* netinet/tcp.h */ |