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[glibc/history.git] / sysdeps / generic / netinet / ip.h
blobfc91440527b88982643409c8c40d9238cf67e20f
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.
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.
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.
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. */
19 #ifndef __NETINET_IP_H
20 #define __NETINET_IP_H 1
22 #include <features.h>
23 #include <sys/types.h>
25 #include <netinet/in.h>
27 __BEGIN_DECLS
29 struct timestamp
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];
45 struct iphdr
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. */
68 #ifdef __USE_BSD
70 * Copyright (c) 1982, 1986, 1993
71 * The Regents of the University of California. All rights reserved.
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.
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.
97 * @(#)ip.h 8.1 (Berkeley) 6/10/93
101 * Definitions for internet protocol version 4.
102 * Per RFC 791, September 1981.
106 * Structure of an internet header, naked of options.
108 struct ip
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 */
133 * Time stamp option structure.
135 struct ip_timestamp
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];
150 #endif /* __USE_BSD */
152 #define IPVERSION 4 /* IP version number */
153 #define IP_MAXPACKET 65535 /* maximum packet size */
156 * Definitions for IP type of service (ip_tos)
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
167 * Definitions for IP precedence (also in ip_tos) (hopefully unused)
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
181 * Definitions for options.
183 #define IPOPT_COPY 0x80
184 #define IPOPT_CLASS_MASK 0x60
185 #define IPOPT_NUMBER_MASK 0x1f
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)
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
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
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 */
214 * Offsets to fields in options other than EOL and NOP.
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 */
221 #define MAX_IPOPTLEN 40
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 */
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
238 * Internet implementation parameters.
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 */
245 #define IP_MSS 576 /* default maximum segment size */
247 __END_DECLS
249 #endif /* netinet/ip.h */