1 /* Copyright (C) 1991, 92, 93, 95, 96, 97 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #ifndef __NETINET_IP_H
20 #define __NETINET_IP_H 1
22 #include <sys/cdefs.h>
23 #include <sys/types.h>
25 #include <netinet/in.h>
33 #if __BYTE_ORDER == __LITTLE_ENDIAN
35 unsigned int overflow:4;
36 #elif __BYTE_ORDER == __BIG_ENDIAN
37 unsigned int overflow:4;
40 # error "Please fix <bits/endian.h>"
47 u_int32_t faddr; /* Saved first hop address */
52 unsigned int is_setbyuser:1; /* Set by setsockopt? */
53 unsigned int is_data:1; /* Options in __data, rather than skb */
54 unsigned int is_strictroute:1; /* Strict source route */
55 unsigned int srr_is_hit:1; /* Packet destination addr was our one */
56 unsigned int is_changed:1; /* IP checksum more not valid */
57 unsigned int rr_needaddr:1; /* Need to record addr of outgoing dev */
58 unsigned int ts_needtime:1; /* Need to record timestamp */
59 unsigned int ts_needaddr:1; /* Need to record addr of outgoing dev */
60 u_int8_t router_alert;
68 #if __BYTE_ORDER == __LITTLE_ENDIAN
70 unsigned int version:4;
71 #elif __BYTE_ORDER == __BIG_ENDIAN
72 unsigned int version:4;
75 # error "Please fix <bits/endian.h>"
86 /*The options start here. */
91 * Copyright (c) 1982, 1986, 1993
92 * The Regents of the University of California. All rights reserved.
94 * Redistribution and use in source and binary forms, with or without
95 * modification, are permitted provided that the following conditions
97 * 1. Redistributions of source code must retain the above copyright
98 * notice, this list of conditions and the following disclaimer.
99 * 2. Redistributions in binary form must reproduce the above copyright
100 * notice, this list of conditions and the following disclaimer in the
101 * documentation and/or other materials provided with the distribution.
102 * 3. All advertising materials mentioning features or use of this software
103 * must display the following acknowledgement:
104 * This product includes software developed by the University of
105 * California, Berkeley and its contributors.
106 * 4. Neither the name of the University nor the names of its contributors
107 * may be used to endorse or promote products derived from this software
108 * without specific prior written permission.
110 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
111 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
112 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
113 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
114 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
115 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
116 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
117 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
118 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
119 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
122 * @(#)ip.h 8.1 (Berkeley) 6/10/93
126 * Definitions for internet protocol version 4.
127 * Per RFC 791, September 1981.
131 * Structure of an internet header, naked of options.
135 #if __BYTE_ORDER == __LITTLE_ENDIAN
136 unsigned int ip_hl:4; /* header length */
137 unsigned int ip_v:4; /* version */
139 #if __BYTE_ORDER == __BIG_ENDIAN
140 unsigned int ip_v:4; /* version */
141 unsigned int ip_hl:4; /* header length */
143 u_int8_t ip_tos; /* type of service */
144 u_short ip_len; /* total length */
145 u_short ip_id; /* identification */
146 u_short ip_off; /* fragment offset field */
147 #define IP_RF 0x8000 /* reserved fragment flag */
148 #define IP_DF 0x4000 /* dont fragment flag */
149 #define IP_MF 0x2000 /* more fragments flag */
150 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */
151 u_int8_t ip_ttl; /* time to live */
152 u_int8_t ip_p; /* protocol */
153 u_short ip_sum; /* checksum */
154 struct in_addr ip_src, ip_dst; /* source and dest address */
158 * Time stamp option structure.
162 u_int8_t ipt_code; /* IPOPT_TS */
163 u_int8_t ipt_len; /* size of structure (variable) */
164 u_int8_t ipt_ptr; /* index of current entry */
165 #if __BYTE_ORDER == __LITTLE_ENDIAN
166 unsigned int ipt_flg:4; /* flags, see below */
167 unsigned int ipt_oflw:4; /* overflow counter */
169 #if __BYTE_ORDER == __BIG_ENDIAN
170 unsigned int ipt_oflw:4; /* overflow counter */
171 unsigned int ipt_flg:4; /* flags, see below */
175 #endif /* __USE_BSD */
177 #define IPVERSION 4 /* IP version number */
178 #define IP_MAXPACKET 65535 /* maximum packet size */
181 * Definitions for IP type of service (ip_tos)
183 #define IPTOS_TOS_MASK 0x1E
184 #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK)
185 #define IPTOS_LOWDELAY 0x10
186 #define IPTOS_THROUGHPUT 0x08
187 #define IPTOS_RELIABILITY 0x04
188 #define IPTOS_LOWCOST 0x02
189 #define IPTOS_MINCOST IPTOS_LOWCOST
192 * Definitions for IP precedence (also in ip_tos) (hopefully unused)
194 #define IPTOS_PREC_MASK 0xe0
195 #define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK)
196 #define IPTOS_PREC_NETCONTROL 0xe0
197 #define IPTOS_PREC_INTERNETCONTROL 0xc0
198 #define IPTOS_PREC_CRITIC_ECP 0xa0
199 #define IPTOS_PREC_FLASHOVERRIDE 0x80
200 #define IPTOS_PREC_FLASH 0x60
201 #define IPTOS_PREC_IMMEDIATE 0x40
202 #define IPTOS_PREC_PRIORITY 0x20
203 #define IPTOS_PREC_ROUTINE 0x00
206 * Definitions for options.
208 #define IPOPT_COPY 0x80
209 #define IPOPT_CLASS_MASK 0x60
210 #define IPOPT_NUMBER_MASK 0x1f
212 #define IPOPT_COPIED(o) ((o) & IPOPT_COPY)
213 #define IPOPT_CLASS(o) ((o) & IPOPT_CLASS_MASK)
214 #define IPOPT_NUMBER(o) ((o) & IPOPT_NUMBER_MASK)
216 #define IPOPT_CONTROL 0x00
217 #define IPOPT_RESERVED1 0x20
218 #define IPOPT_DEBMEAS 0x40
219 #define IPOPT_MEASUREMENT IPOPT_DEBMEAS
220 #define IPOPT_RESERVED2 0x60
222 #define IPOPT_EOL 0 /* end of option list */
223 #define IPOPT_END IPOPT_EOL
224 #define IPOPT_NOP 1 /* no operation */
225 #define IPOPT_NOOP IP_NOP
227 #define IPOPT_RR 7 /* record packet route */
228 #define IPOPT_TS 68 /* timestamp */
229 #define IPOPT_TIMESTAMP IPOPT_TS
230 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */
231 #define IPOPT_SEC IPOPT_SECURITY
232 #define IPOPT_LSRR 131 /* loose source route */
233 #define IPOPT_SATID 136 /* satnet id */
234 #define IPOPT_SID IPOPT_SATID
235 #define IPOPT_SSRR 137 /* strict source route */
236 #define IPOPT_RA 148 /* router alert */
239 * Offsets to fields in options other than EOL and NOP.
241 #define IPOPT_OPTVAL 0 /* option ID */
242 #define IPOPT_OLEN 1 /* option length */
243 #define IPOPT_OFFSET 2 /* offset within option */
244 #define IPOPT_MINOFF 4 /* min value of above */
246 #define MAX_IPOPTLEN 40
248 /* flag bits for ipt_flg */
249 #define IPOPT_TS_TSONLY 0 /* timestamps only */
250 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */
251 #define IPOPT_TS_PRESPEC 3 /* specified modules only */
253 /* bits for security (not byte swapped) */
254 #define IPOPT_SECUR_UNCLASS 0x0000
255 #define IPOPT_SECUR_CONFID 0xf135
256 #define IPOPT_SECUR_EFTO 0x789a
257 #define IPOPT_SECUR_MMMM 0xbc4d
258 #define IPOPT_SECUR_RESTR 0xaf13
259 #define IPOPT_SECUR_SECRET 0xd788
260 #define IPOPT_SECUR_TOPSECRET 0x6bc5
263 * Internet implementation parameters.
265 #define MAXTTL 255 /* maximum time to live (seconds) */
266 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */
267 #define IPFRAGTTL 60 /* time to live for frags, slowhz */
268 #define IPTTLDEC 1 /* subtracted when forwarding */
270 #define IP_MSS 576 /* default maximum segment size */
274 #endif /* netinet/ip.h */