1/* Copyright (C) 1991-1993,1995-2000,2009,2010 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 29struct 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 45struct 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 */ 108struct 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 */ 135struct 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 */ 194 195#define IPTOS_CLASS_MASK 0xe0 196#define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK) 197#define IPTOS_CLASS_CS0 0x00 198#define IPTOS_CLASS_CS1 0x20 199#define IPTOS_CLASS_CS2 0x40 200#define IPTOS_CLASS_CS3 0x60 201#define IPTOS_CLASS_CS4 0x80 202#define IPTOS_CLASS_CS5 0xa0 203#define IPTOS_CLASS_CS6 0xc0 204#define IPTOS_CLASS_CS7 0xe0 205 206#define IPTOS_CLASS_DEFAULT IPTOS_CLASS_CS0 207 208/* 209 * Definitions for IP type of service (ip_tos) [deprecated; use DSCP 210 * and CS definitions above instead.] 211 */ 212#define IPTOS_TOS_MASK 0x1E 213#define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) 214#define IPTOS_LOWDELAY 0x10 215#define IPTOS_THROUGHPUT 0x08 216#define IPTOS_RELIABILITY 0x04 217#define IPTOS_LOWCOST 0x02 218#define IPTOS_MINCOST IPTOS_LOWCOST 219 220/* 221 * Definitions for IP precedence (also in ip_tos) [also deprecated.] 222 */ 223#define IPTOS_PREC_MASK IPTOS_CLASS_MASK 224#define IPTOS_PREC(tos) IPTOS_CLASS(tos) 225#define IPTOS_PREC_NETCONTROL IPTOS_CLASS_CS7 226#define IPTOS_PREC_INTERNETCONTROL IPTOS_CLASS_CS6 227#define IPTOS_PREC_CRITIC_ECP IPTOS_CLASS_CS5 228#define IPTOS_PREC_FLASHOVERRIDE IPTOS_CLASS_CS4 229#define IPTOS_PREC_FLASH IPTOS_CLASS_CS3 230#define IPTOS_PREC_IMMEDIATE IPTOS_CLASS_CS2 231#define IPTOS_PREC_PRIORITY IPTOS_CLASS_CS1 232#define IPTOS_PREC_ROUTINE IPTOS_CLASS_CS0 233 234/* 235 * Definitions for options. 236 */ 237#define IPOPT_COPY 0x80 238#define IPOPT_CLASS_MASK 0x60 239#define IPOPT_NUMBER_MASK 0x1f 240 241#define IPOPT_COPIED(o) ((o) & IPOPT_COPY) 242#define IPOPT_CLASS(o) ((o) & IPOPT_CLASS_MASK) 243#define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK) 244 245#define IPOPT_CONTROL 0x00 246#define IPOPT_RESERVED1 0x20 247#define IPOPT_DEBMEAS 0x40 248#define IPOPT_MEASUREMENT IPOPT_DEBMEAS 249#define IPOPT_RESERVED2 0x60 250 251#define IPOPT_EOL 0 /* end of option list */ 252#define IPOPT_END IPOPT_EOL 253#define IPOPT_NOP 1 /* no operation */ 254#define IPOPT_NOOP IPOPT_NOP 255 256#define IPOPT_RR 7 /* record packet route */ 257#define IPOPT_TS 68 /* timestamp */ 258#define IPOPT_TIMESTAMP IPOPT_TS 259#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 260#define IPOPT_SEC IPOPT_SECURITY 261#define IPOPT_LSRR 131 /* loose source route */ 262#define IPOPT_SATID 136 /* satnet id */ 263#define IPOPT_SID IPOPT_SATID 264#define IPOPT_SSRR 137 /* strict source route */ 265#define IPOPT_RA 148 /* router alert */ 266 267/* 268 * Offsets to fields in options other than EOL and NOP. 269 */ 270#define IPOPT_OPTVAL 0 /* option ID */ 271#define IPOPT_OLEN 1 /* option length */ 272#define IPOPT_OFFSET 2 /* offset within option */ 273#define IPOPT_MINOFF 4 /* min value of above */ 274 275#define MAX_IPOPTLEN 40 276 277/* flag bits for ipt_flg */ 278#define IPOPT_TS_TSONLY 0 /* timestamps only */ 279#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 280#define IPOPT_TS_PRESPEC 3 /* specified modules only */ 281 282/* bits for security (not byte swapped) */ 283#define IPOPT_SECUR_UNCLASS 0x0000 284#define IPOPT_SECUR_CONFID 0xf135 285#define IPOPT_SECUR_EFTO 0x789a 286#define IPOPT_SECUR_MMMM 0xbc4d 287#define IPOPT_SECUR_RESTR 0xaf13 288#define IPOPT_SECUR_SECRET 0xd788 289#define IPOPT_SECUR_TOPSECRET 0x6bc5 290 291/* 292 * Internet implementation parameters. 293 */ 294#define MAXTTL 255 /* maximum time to live (seconds) */ 295#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 296#define IPFRAGTTL 60 /* time to live for frags, slowhz */ 297#define IPTTLDEC 1 /* subtracted when forwarding */ 298 299#define IP_MSS 576 /* default maximum segment size */ 300 301__END_DECLS 302 303#endif /* netinet/ip.h */ 304