1 | /* Copyright (C) 1991-2018 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, see |
16 | <http://www.gnu.org/licenses/>. */ |
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 | { |
30 | uint8_t len; |
31 | uint8_t ptr; |
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 |
41 | uint32_t data[9]; |
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 |
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; |
64 | /*The options start here. */ |
65 | }; |
66 | |
67 | #ifdef __USE_MISC |
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. |
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 | |
99 | /* |
100 | * Definitions for internet protocol version 4. |
101 | * Per RFC 791, September 1981. |
102 | */ |
103 | |
104 | /* |
105 | * Structure of an internet header, naked of options. |
106 | */ |
107 | struct ip |
108 | { |
109 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
110 | unsigned int ip_hl:4; /* header length */ |
111 | unsigned int ip_v:4; /* version */ |
112 | #endif |
113 | #if __BYTE_ORDER == __BIG_ENDIAN |
114 | unsigned int ip_v:4; /* version */ |
115 | unsigned int ip_hl:4; /* header length */ |
116 | #endif |
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 */ |
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 */ |
125 | uint8_t ip_ttl; /* time to live */ |
126 | uint8_t ip_p; /* protocol */ |
127 | unsigned short ip_sum; /* checksum */ |
128 | struct in_addr ip_src, ip_dst; /* source and dest address */ |
129 | }; |
130 | |
131 | /* |
132 | * Time stamp option structure. |
133 | */ |
134 | struct ip_timestamp |
135 | { |
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 */ |
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 |
147 | uint32_t data[9]; |
148 | }; |
149 | #endif /* __USE_MISC */ |
150 | |
151 | #define IPVERSION 4 /* IP version number */ |
152 | #define IP_MAXPACKET 65535 /* maximum packet size */ |
153 | |
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 | |
189 | /* |
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 |
195 | #define IPTOS_CLASS(class) ((class) & IPTOS_CLASS_MASK) |
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.] |
210 | */ |
211 | #define IPTOS_TOS_MASK 0x1E |
212 | #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK) |
213 | #define IPTOS_LOWDELAY 0x10 |
214 | #define IPTOS_THROUGHPUT 0x08 |
215 | #define IPTOS_RELIABILITY 0x04 |
216 | #define IPTOS_LOWCOST 0x02 |
217 | #define IPTOS_MINCOST IPTOS_LOWCOST |
218 | |
219 | /* |
220 | * Definitions for IP precedence (also in ip_tos) [also deprecated.] |
221 | */ |
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 |
232 | |
233 | /* |
234 | * Definitions for options. |
235 | */ |
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) |
243 | |
244 | #define IPOPT_CONTROL 0x00 |
245 | #define IPOPT_RESERVED1 0x20 |
246 | #define IPOPT_DEBMEAS 0x40 |
247 | #define IPOPT_MEASUREMENT IPOPT_DEBMEAS |
248 | #define IPOPT_RESERVED2 0x60 |
249 | |
250 | #define IPOPT_EOL 0 /* end of option list */ |
251 | #define IPOPT_END IPOPT_EOL |
252 | #define IPOPT_NOP 1 /* no operation */ |
253 | #define IPOPT_NOOP IPOPT_NOP |
254 | |
255 | #define IPOPT_RR 7 /* record packet route */ |
256 | #define IPOPT_TS 68 /* timestamp */ |
257 | #define IPOPT_TIMESTAMP IPOPT_TS |
258 | #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ |
259 | #define IPOPT_SEC IPOPT_SECURITY |
260 | #define IPOPT_LSRR 131 /* loose source route */ |
261 | #define IPOPT_SATID 136 /* satnet id */ |
262 | #define IPOPT_SID IPOPT_SATID |
263 | #define IPOPT_SSRR 137 /* strict source route */ |
264 | #define IPOPT_RA 148 /* router alert */ |
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 | |
274 | #define MAX_IPOPTLEN 40 |
275 | |
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 */ |
299 | |
300 | __END_DECLS |
301 | |
302 | #endif /* netinet/ip.h */ |
303 | |