1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2000 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 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 IP type of service (ip_tos) 157 */ 158 #define IPTOS_TOS_MASK 0x1E 159 #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) 160 #define IPTOS_LOWDELAY 0x10 161 #define IPTOS_THROUGHPUT 0x08 162 #define IPTOS_RELIABILITY 0x04 163 #define IPTOS_LOWCOST 0x02 164 #define IPTOS_MINCOST IPTOS_LOWCOST 165 166 /* 167 * Definitions for IP precedence (also in ip_tos) (hopefully unused) 168 */ 169 #define IPTOS_PREC_MASK 0xe0 170 #define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK) 171 #define IPTOS_PREC_NETCONTROL 0xe0 172 #define IPTOS_PREC_INTERNETCONTROL 0xc0 173 #define IPTOS_PREC_CRITIC_ECP 0xa0 174 #define IPTOS_PREC_FLASHOVERRIDE 0x80 175 #define IPTOS_PREC_FLASH 0x60 176 #define IPTOS_PREC_IMMEDIATE 0x40 177 #define IPTOS_PREC_PRIORITY 0x20 178 #define IPTOS_PREC_ROUTINE 0x00 179 180 /* 181 * Definitions for options. 182 */ 183 #define IPOPT_COPY 0x80 184 #define IPOPT_CLASS_MASK 0x60 185 #define IPOPT_NUMBER_MASK 0x1f 186 187 #define IPOPT_COPIED(o) ((o) & IPOPT_COPY) 188 #define IPOPT_CLASS(o) ((o) & IPOPT_CLASS_MASK) 189 #define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK) 190 191 #define IPOPT_CONTROL 0x00 192 #define IPOPT_RESERVED1 0x20 193 #define IPOPT_DEBMEAS 0x40 194 #define IPOPT_MEASUREMENT IPOPT_DEBMEAS 195 #define IPOPT_RESERVED2 0x60 196 197 #define IPOPT_EOL 0 /* end of option list */ 198 #define IPOPT_END IPOPT_EOL 199 #define IPOPT_NOP 1 /* no operation */ 200 #define IPOPT_NOOP IPOPT_NOP 201 202 #define IPOPT_RR 7 /* record packet route */ 203 #define IPOPT_TS 68 /* timestamp */ 204 #define IPOPT_TIMESTAMP IPOPT_TS 205 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 206 #define IPOPT_SEC IPOPT_SECURITY 207 #define IPOPT_LSRR 131 /* loose source route */ 208 #define IPOPT_SATID 136 /* satnet id */ 209 #define IPOPT_SID IPOPT_SATID 210 #define IPOPT_SSRR 137 /* strict source route */ 211 #define IPOPT_RA 148 /* router alert */ 212 213 /* 214 * Offsets to fields in options other than EOL and NOP. 215 */ 216 #define IPOPT_OPTVAL 0 /* option ID */ 217 #define IPOPT_OLEN 1 /* option length */ 218 #define IPOPT_OFFSET 2 /* offset within option */ 219 #define IPOPT_MINOFF 4 /* min value of above */ 220 221 #define MAX_IPOPTLEN 40 222 223 /* flag bits for ipt_flg */ 224 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 225 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 226 #define IPOPT_TS_PRESPEC 3 /* specified modules only */ 227 228 /* bits for security (not byte swapped) */ 229 #define IPOPT_SECUR_UNCLASS 0x0000 230 #define IPOPT_SECUR_CONFID 0xf135 231 #define IPOPT_SECUR_EFTO 0x789a 232 #define IPOPT_SECUR_MMMM 0xbc4d 233 #define IPOPT_SECUR_RESTR 0xaf13 234 #define IPOPT_SECUR_SECRET 0xd788 235 #define IPOPT_SECUR_TOPSECRET 0x6bc5 236 237 /* 238 * Internet implementation parameters. 239 */ 240 #define MAXTTL 255 /* maximum time to live (seconds) */ 241 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 242 #define IPFRAGTTL 60 /* time to live for frags, slowhz */ 243 #define IPTTLDEC 1 /* subtracted when forwarding */ 244 245 #define IP_MSS 576 /* default maximum segment size */ 246 247 __END_DECLS 248 249 #endif /* netinet/ip.h */ 250
