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581c785b | 1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
bcef95d8 RM |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
bcef95d8 RM |
17 | |
18 | #ifndef __NETINET_IP_H | |
19 | #define __NETINET_IP_H 1 | |
20 | ||
21 | #include <features.h> | |
22 | #include <sys/types.h> | |
23 | ||
24 | #include <netinet/in.h> | |
25 | ||
26 | __BEGIN_DECLS | |
27 | ||
28 | struct timestamp | |
29 | { | |
11160cb7 ZW |
30 | uint8_t len; |
31 | uint8_t ptr; | |
bcef95d8 RM |
32 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
33 | unsigned int flags:4; | |
34 | unsigned int overflow:4; | |
35 | #elif __BYTE_ORDER == __BIG_ENDIAN | |
36 | unsigned int overflow:4; | |
37 | unsigned int flags:4; | |
38 | #else | |
39 | # error "Please fix <bits/endian.h>" | |
40 | #endif | |
11160cb7 | 41 | uint32_t data[9]; |
bcef95d8 RM |
42 | }; |
43 | ||
44 | struct iphdr | |
45 | { | |
46 | #if __BYTE_ORDER == __LITTLE_ENDIAN | |
47 | unsigned int ihl:4; | |
48 | unsigned int version:4; | |
49 | #elif __BYTE_ORDER == __BIG_ENDIAN | |
50 | unsigned int version:4; | |
51 | unsigned int ihl:4; | |
52 | #else | |
53 | # error "Please fix <bits/endian.h>" | |
54 | #endif | |
11160cb7 ZW |
55 | uint8_t tos; |
56 | uint16_t tot_len; | |
57 | uint16_t id; | |
58 | uint16_t frag_off; | |
59 | uint8_t ttl; | |
60 | uint8_t protocol; | |
61 | uint16_t check; | |
62 | uint32_t saddr; | |
63 | uint32_t daddr; | |
bcef95d8 RM |
64 | /*The options start here. */ |
65 | }; | |
66 | ||
498afc54 | 67 | #ifdef __USE_MISC |
df4ef2ab UD |
68 | /* |
69 | * Copyright (c) 1982, 1986, 1993 | |
70 | * The Regents of the University of California. All rights reserved. | |
71 | * | |
72 | * Redistribution and use in source and binary forms, with or without | |
73 | * modification, are permitted provided that the following conditions | |
74 | * are met: | |
75 | * 1. Redistributions of source code must retain the above copyright | |
76 | * notice, this list of conditions and the following disclaimer. | |
77 | * 2. Redistributions in binary form must reproduce the above copyright | |
78 | * notice, this list of conditions and the following disclaimer in the | |
79 | * documentation and/or other materials provided with the distribution. | |
df4ef2ab UD |
80 | * 4. Neither the name of the University nor the names of its contributors |
81 | * may be used to endorse or promote products derived from this software | |
82 | * without specific prior written permission. | |
83 | * | |
84 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
85 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
86 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
87 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
88 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
89 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
90 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
91 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
92 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
93 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
94 | * SUCH DAMAGE. | |
95 | * | |
96 | * @(#)ip.h 8.1 (Berkeley) 6/10/93 | |
97 | */ | |
98 | ||
df4ef2ab UD |
99 | /* |
100 | * Definitions for internet protocol version 4. | |
101 | * Per RFC 791, September 1981. | |
102 | */ | |
df4ef2ab UD |
103 | |
104 | /* | |
105 | * Structure of an internet header, naked of options. | |
106 | */ | |
bcef95d8 RM |
107 | struct ip |
108 | { | |
df4ef2ab | 109 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
bcef95d8 RM |
110 | unsigned int ip_hl:4; /* header length */ |
111 | unsigned int ip_v:4; /* version */ | |
df4ef2ab UD |
112 | #endif |
113 | #if __BYTE_ORDER == __BIG_ENDIAN | |
bcef95d8 RM |
114 | unsigned int ip_v:4; /* version */ |
115 | unsigned int ip_hl:4; /* header length */ | |
df4ef2ab | 116 | #endif |
11160cb7 ZW |
117 | uint8_t ip_tos; /* type of service */ |
118 | unsigned short ip_len; /* total length */ | |
119 | unsigned short ip_id; /* identification */ | |
120 | unsigned short ip_off; /* fragment offset field */ | |
df4ef2ab UD |
121 | #define IP_RF 0x8000 /* reserved fragment flag */ |
122 | #define IP_DF 0x4000 /* dont fragment flag */ | |
123 | #define IP_MF 0x2000 /* more fragments flag */ | |
124 | #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ | |
11160cb7 ZW |
125 | uint8_t ip_ttl; /* time to live */ |
126 | uint8_t ip_p; /* protocol */ | |
127 | unsigned short ip_sum; /* checksum */ | |
bcef95d8 RM |
128 | struct in_addr ip_src, ip_dst; /* source and dest address */ |
129 | }; | |
df4ef2ab | 130 | |
bcef95d8 RM |
131 | /* |
132 | * Time stamp option structure. | |
133 | */ | |
134 | struct ip_timestamp | |
135 | { | |
11160cb7 ZW |
136 | uint8_t ipt_code; /* IPOPT_TS */ |
137 | uint8_t ipt_len; /* size of structure (variable) */ | |
138 | uint8_t ipt_ptr; /* index of current entry */ | |
bcef95d8 RM |
139 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
140 | unsigned int ipt_flg:4; /* flags, see below */ | |
141 | unsigned int ipt_oflw:4; /* overflow counter */ | |
142 | #endif | |
143 | #if __BYTE_ORDER == __BIG_ENDIAN | |
144 | unsigned int ipt_oflw:4; /* overflow counter */ | |
145 | unsigned int ipt_flg:4; /* flags, see below */ | |
146 | #endif | |
11160cb7 | 147 | uint32_t data[9]; |
bcef95d8 | 148 | }; |
498afc54 | 149 | #endif /* __USE_MISC */ |
bcef95d8 RM |
150 | |
151 | #define IPVERSION 4 /* IP version number */ | |
df4ef2ab UD |
152 | #define IP_MAXPACKET 65535 /* maximum packet size */ |
153 | ||
8d556281 PP |
154 | /* |
155 | * Definitions for Explicit Congestion Notification (ECN) | |
156 | * | |
157 | * Taken from RFC-3168, Section 5. | |
158 | */ | |
159 | ||
160 | #define IPTOS_ECN_MASK 0x03 | |
161 | #define IPTOS_ECN(x) ((x) & IPTOS_ECN_MASK) | |
162 | #define IPTOS_ECN_NOT_ECT 0x00 | |
163 | #define IPTOS_ECN_ECT1 0x01 | |
164 | #define IPTOS_ECN_ECT0 0x02 | |
165 | #define IPTOS_ECN_CE 0x03 | |
166 | ||
167 | /* | |
168 | * Definitions for IP differentiated services code points (DSCP) | |
169 | * | |
170 | * Taken from RFC-2597, Section 6 and RFC-2598, Section 2.3. | |
171 | */ | |
172 | ||
173 | #define IPTOS_DSCP_MASK 0xfc | |
174 | #define IPTOS_DSCP(x) ((x) & IPTOS_DSCP_MASK) | |
175 | #define IPTOS_DSCP_AF11 0x28 | |
176 | #define IPTOS_DSCP_AF12 0x30 | |
177 | #define IPTOS_DSCP_AF13 0x38 | |
178 | #define IPTOS_DSCP_AF21 0x48 | |
179 | #define IPTOS_DSCP_AF22 0x50 | |
180 | #define IPTOS_DSCP_AF23 0x58 | |
181 | #define IPTOS_DSCP_AF31 0x68 | |
182 | #define IPTOS_DSCP_AF32 0x70 | |
183 | #define IPTOS_DSCP_AF33 0x78 | |
184 | #define IPTOS_DSCP_AF41 0x88 | |
185 | #define IPTOS_DSCP_AF42 0x90 | |
186 | #define IPTOS_DSCP_AF43 0x98 | |
187 | #define IPTOS_DSCP_EF 0xb8 | |
188 | ||
df4ef2ab | 189 | /* |
dca5d51e PP |
190 | * In RFC 2474, Section 4.2.2.1, the Class Selector Codepoints subsume |
191 | * the old ToS Precedence values. | |
192 | */ | |
193 | ||
194 | #define IPTOS_CLASS_MASK 0xe0 | |
15bac72b | 195 | #define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK) |
dca5d51e PP |
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.] | |
df4ef2ab | 210 | */ |
bcef95d8 RM |
211 | #define IPTOS_TOS_MASK 0x1E |
212 | #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) | |
df4ef2ab UD |
213 | #define IPTOS_LOWDELAY 0x10 |
214 | #define IPTOS_THROUGHPUT 0x08 | |
215 | #define IPTOS_RELIABILITY 0x04 | |
5290baf0 UD |
216 | #define IPTOS_LOWCOST 0x02 |
217 | #define IPTOS_MINCOST IPTOS_LOWCOST | |
df4ef2ab UD |
218 | |
219 | /* | |
dca5d51e | 220 | * Definitions for IP precedence (also in ip_tos) [also deprecated.] |
df4ef2ab | 221 | */ |
dca5d51e PP |
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 | |
df4ef2ab UD |
232 | |
233 | /* | |
234 | * Definitions for options. | |
235 | */ | |
bcef95d8 RM |
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) | |
df4ef2ab UD |
243 | |
244 | #define IPOPT_CONTROL 0x00 | |
245 | #define IPOPT_RESERVED1 0x20 | |
246 | #define IPOPT_DEBMEAS 0x40 | |
bcef95d8 | 247 | #define IPOPT_MEASUREMENT IPOPT_DEBMEAS |
df4ef2ab UD |
248 | #define IPOPT_RESERVED2 0x60 |
249 | ||
250 | #define IPOPT_EOL 0 /* end of option list */ | |
bcef95d8 | 251 | #define IPOPT_END IPOPT_EOL |
df4ef2ab | 252 | #define IPOPT_NOP 1 /* no operation */ |
bcef95d8 | 253 | #define IPOPT_NOOP IPOPT_NOP |
df4ef2ab UD |
254 | |
255 | #define IPOPT_RR 7 /* record packet route */ | |
256 | #define IPOPT_TS 68 /* timestamp */ | |
bcef95d8 | 257 | #define IPOPT_TIMESTAMP IPOPT_TS |
df4ef2ab | 258 | #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ |
bcef95d8 | 259 | #define IPOPT_SEC IPOPT_SECURITY |
df4ef2ab UD |
260 | #define IPOPT_LSRR 131 /* loose source route */ |
261 | #define IPOPT_SATID 136 /* satnet id */ | |
bcef95d8 | 262 | #define IPOPT_SID IPOPT_SATID |
df4ef2ab | 263 | #define IPOPT_SSRR 137 /* strict source route */ |
bcef95d8 | 264 | #define IPOPT_RA 148 /* router alert */ |
df4ef2ab UD |
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 | ||
c0e45674 UD |
274 | #define MAX_IPOPTLEN 40 |
275 | ||
df4ef2ab UD |
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 */ | |
1fb05e3d | 299 | |
bcef95d8 RM |
300 | __END_DECLS |
301 | ||
302 | #endif /* netinet/ip.h */ |