1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2009 Free Software 2 Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <http://www.gnu.org/licenses/>. */ 18 19 #ifndef __NETINET_IP_H 20 #define __NETINET_IP_H 1 21 22 #include <features.h> 23 #include <sys/types.h> 24 25 #include <netinet/in.h> 26 27 __BEGIN_DECLS 28 29 struct timestamp 30 { 31 u_int8_t len; 32 u_int8_t ptr; 33 #if __BYTE_ORDER == __LITTLE_ENDIAN 34 unsigned int flags:4; 35 unsigned int overflow:4; 36 #elif __BYTE_ORDER == __BIG_ENDIAN 37 unsigned int overflow:4; 38 unsigned int flags:4; 39 #else 40 # error "Please fix <bits/endian.h>" 41 #endif 42 u_int32_t data[9]; 43 }; 44 45 struct iphdr 46 { 47 #if __BYTE_ORDER == __LITTLE_ENDIAN 48 unsigned int ihl:4; 49 unsigned int version:4; 50 #elif __BYTE_ORDER == __BIG_ENDIAN 51 unsigned int version:4; 52 unsigned int ihl:4; 53 #else 54 # error "Please fix <bits/endian.h>" 55 #endif 56 u_int8_t tos; 57 u_int16_t tot_len; 58 u_int16_t id; 59 u_int16_t frag_off; 60 u_int8_t ttl; 61 u_int8_t protocol; 62 u_int16_t check; 63 u_int32_t saddr; 64 u_int32_t daddr; 65 /*The options start here. */ 66 }; 67 68 #ifdef __USE_BSD 69 /* 70 * Copyright (c) 1982, 1986, 1993 71 * The Regents of the University of California. All rights reserved. 72 * 73 * Redistribution and use in source and binary forms, with or without 74 * modification, are permitted provided that the following conditions 75 * are met: 76 * 1. Redistributions of source code must retain the above copyright 77 * notice, this list of conditions and the following disclaimer. 78 * 2. Redistributions in binary form must reproduce the above copyright 79 * notice, this list of conditions and the following disclaimer in the 80 * documentation and/or other materials provided with the distribution. 81 * 4. Neither the name of the University nor the names of its contributors 82 * may be used to endorse or promote products derived from this software 83 * without specific prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 86 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 87 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 88 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 89 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 90 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 91 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * @(#)ip.h 8.1 (Berkeley) 6/10/93 98 */ 99 100 /* 101 * Definitions for internet protocol version 4. 102 * Per RFC 791, September 1981. 103 */ 104 105 /* 106 * Structure of an internet header, naked of options. 107 */ 108 struct ip 109 { 110 #if __BYTE_ORDER == __LITTLE_ENDIAN 111 unsigned int ip_hl:4; /* header length */ 112 unsigned int ip_v:4; /* version */ 113 #endif 114 #if __BYTE_ORDER == __BIG_ENDIAN 115 unsigned int ip_v:4; /* version */ 116 unsigned int ip_hl:4; /* header length */ 117 #endif 118 u_int8_t ip_tos; /* type of service */ 119 u_short ip_len; /* total length */ 120 u_short ip_id; /* identification */ 121 u_short ip_off; /* fragment offset field */ 122 #define IP_RF 0x8000 /* reserved fragment flag */ 123 #define IP_DF 0x4000 /* dont fragment flag */ 124 #define IP_MF 0x2000 /* more fragments flag */ 125 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ 126 u_int8_t ip_ttl; /* time to live */ 127 u_int8_t ip_p; /* protocol */ 128 u_short ip_sum; /* checksum */ 129 struct in_addr ip_src, ip_dst; /* source and dest address */ 130 }; 131 132 /* 133 * Time stamp option structure. 134 */ 135 struct ip_timestamp 136 { 137 u_int8_t ipt_code; /* IPOPT_TS */ 138 u_int8_t ipt_len; /* size of structure (variable) */ 139 u_int8_t ipt_ptr; /* index of current entry */ 140 #if __BYTE_ORDER == __LITTLE_ENDIAN 141 unsigned int ipt_flg:4; /* flags, see below */ 142 unsigned int ipt_oflw:4; /* overflow counter */ 143 #endif 144 #if __BYTE_ORDER == __BIG_ENDIAN 145 unsigned int ipt_oflw:4; /* overflow counter */ 146 unsigned int ipt_flg:4; /* flags, see below */ 147 #endif 148 u_int32_t data[9]; 149 }; 150 #endif /* __USE_BSD */ 151 152 #define IPVERSION 4 /* IP version number */ 153 #define IP_MAXPACKET 65535 /* maximum packet size */ 154 155 /* 156 * Definitions for Explicit Congestion Notification (ECN) 157 * 158 * Taken from RFC-3168, Section 5. 159 */ 160 161 #define IPTOS_ECN_MASK 0x03 162 #define IPTOS_ECN(x) ((x) & IPTOS_ECN_MASK) 163 #define IPTOS_ECN_NOT_ECT 0x00 164 #define IPTOS_ECN_ECT1 0x01 165 #define IPTOS_ECN_ECT0 0x02 166 #define IPTOS_ECN_CE 0x03 167 168 /* 169 * Definitions for IP differentiated services code points (DSCP) 170 * 171 * Taken from RFC-2597, Section 6 and RFC-2598, Section 2.3. 172 */ 173 174 #define IPTOS_DSCP_MASK 0xfc 175 #define IPTOS_DSCP(x) ((x) & IPTOS_DSCP_MASK) 176 #define IPTOS_DSCP_AF11 0x28 177 #define IPTOS_DSCP_AF12 0x30 178 #define IPTOS_DSCP_AF13 0x38 179 #define IPTOS_DSCP_AF21 0x48 180 #define IPTOS_DSCP_AF22 0x50 181 #define IPTOS_DSCP_AF23 0x58 182 #define IPTOS_DSCP_AF31 0x68 183 #define IPTOS_DSCP_AF32 0x70 184 #define IPTOS_DSCP_AF33 0x78 185 #define IPTOS_DSCP_AF41 0x88 186 #define IPTOS_DSCP_AF42 0x90 187 #define IPTOS_DSCP_AF43 0x98 188 #define IPTOS_DSCP_EF 0xb8 189 190 /* 191 * In RFC 2474, Section 4.2.2.1, the Class Selector Codepoints subsume 192 * the old ToS Precedence values. 193 */ 194 #define IPTOS_CLASS_MASK 0xe0 195 #define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK) 196 #define IPTOS_CLASS_CS0 0x00 197 #define IPTOS_CLASS_CS1 0x20 198 #define IPTOS_CLASS_CS2 0x40 199 #define IPTOS_CLASS_CS3 0x60 200 #define IPTOS_CLASS_CS4 0x80 201 #define IPTOS_CLASS_CS5 0xa0 202 #define IPTOS_CLASS_CS6 0xc0 203 #define IPTOS_CLASS_CS7 0xe0 204 205 #define IPTOS_CLASS_DEFAULT IPTOS_CLASS_CS0 206 207 /* 208 * Definitions for IP type of service (ip_tos) [deprecated; use DSCP 209 * and CS definitions above instead.] 210 */ 211 #define IPTOS_TOS_MASK 0x1E 212 #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) 213 #define IPTOS_LOWDELAY 0x10 214 #define IPTOS_THROUGHPUT 0x08 215 #define IPTOS_RELIABILITY 0x04 216 #define IPTOS_LOWCOST 0x02 217 #define IPTOS_MINCOST IPTOS_LOWCOST 218 219 /* 220 * Definitions for IP precedence (also in ip_tos) [also deprecated.] 221 */ 222 #define IPTOS_PREC_MASK IPTOS_CLASS_MASK 223 #define IPTOS_PREC(tos) IPTOS_CLASS(tos) 224 #define IPTOS_PREC_NETCONTROL IPTOS_CLASS_CS7 225 #define IPTOS_PREC_INTERNETCONTROL IPTOS_CLASS_CS6 226 #define IPTOS_PREC_CRITIC_ECP IPTOS_CLASS_CS5 227 #define IPTOS_PREC_FLASHOVERRIDE IPTOS_CLASS_CS4 228 #define IPTOS_PREC_FLASH IPTOS_CLASS_CS3 229 #define IPTOS_PREC_IMMEDIATE IPTOS_CLASS_CS2 230 #define IPTOS_PREC_PRIORITY IPTOS_CLASS_CS1 231 #define IPTOS_PREC_ROUTINE IPTOS_CLASS_CS0 232 233 /* 234 * Definitions for options. 235 */ 236 #define IPOPT_COPY 0x80 237 #define IPOPT_CLASS_MASK 0x60 238 #define IPOPT_NUMBER_MASK 0x1f 239 240 #define IPOPT_COPIED(o) ((o) & IPOPT_COPY) 241 #define IPOPT_CLASS(o) ((o) & IPOPT_CLASS_MASK) 242 #define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK) 243 244 #define IPOPT_CONTROL 0x00 245 #define IPOPT_RESERVED1 0x20 246 #define IPOPT_DEBMEAS 0x40 247 #define IPOPT_MEASUREMENT IPOPT_DEBMEAS 248 #define IPOPT_RESERVED2 0x60 249 250 #define IPOPT_EOL 0 /* end of option list */ 251 #define IPOPT_END IPOPT_EOL 252 #define IPOPT_NOP 1 /* no operation */ 253 #define IPOPT_NOOP IPOPT_NOP 254 255 #define IPOPT_RR 7 /* record packet route */ 256 #define IPOPT_TS 68 /* timestamp */ 257 #define IPOPT_TIMESTAMP IPOPT_TS 258 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 259 #define IPOPT_SEC IPOPT_SECURITY 260 #define IPOPT_LSRR 131 /* loose source route */ 261 #define IPOPT_SATID 136 /* satnet id */ 262 #define IPOPT_SID IPOPT_SATID 263 #define IPOPT_SSRR 137 /* strict source route */ 264 #define IPOPT_RA 148 /* router alert */ 265 266 /* 267 * Offsets to fields in options other than EOL and NOP. 268 */ 269 #define IPOPT_OPTVAL 0 /* option ID */ 270 #define IPOPT_OLEN 1 /* option length */ 271 #define IPOPT_OFFSET 2 /* offset within option */ 272 #define IPOPT_MINOFF 4 /* min value of above */ 273 274 #define MAX_IPOPTLEN 40 275 276 /* flag bits for ipt_flg */ 277 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 278 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 279 #define IPOPT_TS_PRESPEC 3 /* specified modules only */ 280 281 /* bits for security (not byte swapped) */ 282 #define IPOPT_SECUR_UNCLASS 0x0000 283 #define IPOPT_SECUR_CONFID 0xf135 284 #define IPOPT_SECUR_EFTO 0x789a 285 #define IPOPT_SECUR_MMMM 0xbc4d 286 #define IPOPT_SECUR_RESTR 0xaf13 287 #define IPOPT_SECUR_SECRET 0xd788 288 #define IPOPT_SECUR_TOPSECRET 0x6bc5 289 290 /* 291 * Internet implementation parameters. 292 */ 293 #define MAXTTL 255 /* maximum time to live (seconds) */ 294 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 295 #define IPFRAGTTL 60 /* time to live for frags, slowhz */ 296 #define IPTTLDEC 1 /* subtracted when forwarding */ 297 298 #define IP_MSS 576 /* default maximum segment size */ 299 300 __END_DECLS 301 302 #endif /* netinet/ip.h */ 303