1/* Copyright (C) 1991-2014 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_ICMP6_H
19#define _NETINET_ICMP6_H 1
20
21#include <inttypes.h>
22#include <string.h>
23#include <sys/types.h>
24#include <netinet/in.h>
25
26#define ICMP6_FILTER 1
27
28#define ICMP6_FILTER_BLOCK 1
29#define ICMP6_FILTER_PASS 2
30#define ICMP6_FILTER_BLOCKOTHERS 3
31#define ICMP6_FILTER_PASSONLY 4
32
33struct icmp6_filter
34 {
35 uint32_t icmp6_filt[8];
36 };
37
38struct icmp6_hdr
39 {
40 uint8_t icmp6_type; /* type field */
41 uint8_t icmp6_code; /* code field */
42 uint16_t icmp6_cksum; /* checksum field */
43 union
44 {
45 uint32_t icmp6_un_data32[1]; /* type-specific field */
46 uint16_t icmp6_un_data16[2]; /* type-specific field */
47 uint8_t icmp6_un_data8[4]; /* type-specific field */
48 } icmp6_dataun;
49 };
50
51#define icmp6_data32 icmp6_dataun.icmp6_un_data32
52#define icmp6_data16 icmp6_dataun.icmp6_un_data16
53#define icmp6_data8 icmp6_dataun.icmp6_un_data8
54#define icmp6_pptr icmp6_data32[0] /* parameter prob */
55#define icmp6_mtu icmp6_data32[0] /* packet too big */
56#define icmp6_id icmp6_data16[0] /* echo request/reply */
57#define icmp6_seq icmp6_data16[1] /* echo request/reply */
58#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
59
60#define ICMP6_DST_UNREACH 1
61#define ICMP6_PACKET_TOO_BIG 2
62#define ICMP6_TIME_EXCEEDED 3
63#define ICMP6_PARAM_PROB 4
64
65#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
66
67#define ICMP6_ECHO_REQUEST 128
68#define ICMP6_ECHO_REPLY 129
69#define MLD_LISTENER_QUERY 130
70#define MLD_LISTENER_REPORT 131
71#define MLD_LISTENER_REDUCTION 132
72
73#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
74#define ICMP6_DST_UNREACH_ADMIN 1 /* communication with destination */
75 /* administratively prohibited */
76#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
77#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
78#define ICMP6_DST_UNREACH_NOPORT 4 /* bad port */
79
80#define ICMP6_TIME_EXCEED_TRANSIT 0 /* Hop Limit == 0 in transit */
81#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* Reassembly time out */
82
83#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
84#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized Next Header */
85#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized IPv6 option */
86
87#define ICMP6_FILTER_WILLPASS(type, filterp) \
88 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) == 0)
89
90#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
91 ((((filterp)->icmp6_filt[(type) >> 5]) & (1 << ((type) & 31))) != 0)
92
93#define ICMP6_FILTER_SETPASS(type, filterp) \
94 ((((filterp)->icmp6_filt[(type) >> 5]) &= ~(1 << ((type) & 31))))
95
96#define ICMP6_FILTER_SETBLOCK(type, filterp) \
97 ((((filterp)->icmp6_filt[(type) >> 5]) |= (1 << ((type) & 31))))
98
99#define ICMP6_FILTER_SETPASSALL(filterp) \
100 memset (filterp, 0, sizeof (struct icmp6_filter));
101
102#define ICMP6_FILTER_SETBLOCKALL(filterp) \
103 memset (filterp, 0xFF, sizeof (struct icmp6_filter));
104
105#define ND_ROUTER_SOLICIT 133
106#define ND_ROUTER_ADVERT 134
107#define ND_NEIGHBOR_SOLICIT 135
108#define ND_NEIGHBOR_ADVERT 136
109#define ND_REDIRECT 137
110
111struct nd_router_solicit /* router solicitation */
112 {
113 struct icmp6_hdr nd_rs_hdr;
114 /* could be followed by options */
115 };
116
117#define nd_rs_type nd_rs_hdr.icmp6_type
118#define nd_rs_code nd_rs_hdr.icmp6_code
119#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
120#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
121
122struct nd_router_advert /* router advertisement */
123 {
124 struct icmp6_hdr nd_ra_hdr;
125 uint32_t nd_ra_reachable; /* reachable time */
126 uint32_t nd_ra_retransmit; /* retransmit timer */
127 /* could be followed by options */
128 };
129
130#define nd_ra_type nd_ra_hdr.icmp6_type
131#define nd_ra_code nd_ra_hdr.icmp6_code
132#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
133#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
134#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
135#define ND_RA_FLAG_MANAGED 0x80
136#define ND_RA_FLAG_OTHER 0x40
137#define ND_RA_FLAG_HOME_AGENT 0x20
138#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
139
140struct nd_neighbor_solicit /* neighbor solicitation */
141 {
142 struct icmp6_hdr nd_ns_hdr;
143 struct in6_addr nd_ns_target; /* target address */
144 /* could be followed by options */
145 };
146
147#define nd_ns_type nd_ns_hdr.icmp6_type
148#define nd_ns_code nd_ns_hdr.icmp6_code
149#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
150#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
151
152struct nd_neighbor_advert /* neighbor advertisement */
153 {
154 struct icmp6_hdr nd_na_hdr;
155 struct in6_addr nd_na_target; /* target address */
156 /* could be followed by options */
157 };
158
159#define nd_na_type nd_na_hdr.icmp6_type
160#define nd_na_code nd_na_hdr.icmp6_code
161#define nd_na_cksum nd_na_hdr.icmp6_cksum
162#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
163#if BYTE_ORDER == BIG_ENDIAN
164#define ND_NA_FLAG_ROUTER 0x80000000
165#define ND_NA_FLAG_SOLICITED 0x40000000
166#define ND_NA_FLAG_OVERRIDE 0x20000000
167#else /* BYTE_ORDER == LITTLE_ENDIAN */
168#define ND_NA_FLAG_ROUTER 0x00000080
169#define ND_NA_FLAG_SOLICITED 0x00000040
170#define ND_NA_FLAG_OVERRIDE 0x00000020
171#endif
172
173struct nd_redirect /* redirect */
174 {
175 struct icmp6_hdr nd_rd_hdr;
176 struct in6_addr nd_rd_target; /* target address */
177 struct in6_addr nd_rd_dst; /* destination address */
178 /* could be followed by options */
179 };
180
181#define nd_rd_type nd_rd_hdr.icmp6_type
182#define nd_rd_code nd_rd_hdr.icmp6_code
183#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
184#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
185
186struct nd_opt_hdr /* Neighbor discovery option header */
187 {
188 uint8_t nd_opt_type;
189 uint8_t nd_opt_len; /* in units of 8 octets */
190 /* followed by option specific data */
191 };
192
193#define ND_OPT_SOURCE_LINKADDR 1
194#define ND_OPT_TARGET_LINKADDR 2
195#define ND_OPT_PREFIX_INFORMATION 3
196#define ND_OPT_REDIRECTED_HEADER 4
197#define ND_OPT_MTU 5
198#define ND_OPT_RTR_ADV_INTERVAL 7
199#define ND_OPT_HOME_AGENT_INFO 8
200
201struct nd_opt_prefix_info /* prefix information */
202 {
203 uint8_t nd_opt_pi_type;
204 uint8_t nd_opt_pi_len;
205 uint8_t nd_opt_pi_prefix_len;
206 uint8_t nd_opt_pi_flags_reserved;
207 uint32_t nd_opt_pi_valid_time;
208 uint32_t nd_opt_pi_preferred_time;
209 uint32_t nd_opt_pi_reserved2;
210 struct in6_addr nd_opt_pi_prefix;
211 };
212
213#define ND_OPT_PI_FLAG_ONLINK 0x80
214#define ND_OPT_PI_FLAG_AUTO 0x40
215#define ND_OPT_PI_FLAG_RADDR 0x20
216
217struct nd_opt_rd_hdr /* redirected header */
218 {
219 uint8_t nd_opt_rh_type;
220 uint8_t nd_opt_rh_len;
221 uint16_t nd_opt_rh_reserved1;
222 uint32_t nd_opt_rh_reserved2;
223 /* followed by IP header and data */
224 };
225
226struct nd_opt_mtu /* MTU option */
227 {
228 uint8_t nd_opt_mtu_type;
229 uint8_t nd_opt_mtu_len;
230 uint16_t nd_opt_mtu_reserved;
231 uint32_t nd_opt_mtu_mtu;
232 };
233
234struct mld_hdr
235 {
236 struct icmp6_hdr mld_icmp6_hdr;
237 struct in6_addr mld_addr; /* multicast address */
238 };
239
240#define mld_type mld_icmp6_hdr.icmp6_type
241#define mld_code mld_icmp6_hdr.icmp6_code
242#define mld_cksum mld_icmp6_hdr.icmp6_cksum
243#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
244#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
245
246#define ICMP6_ROUTER_RENUMBERING 138
247
248struct icmp6_router_renum /* router renumbering header */
249 {
250 struct icmp6_hdr rr_hdr;
251 uint8_t rr_segnum;
252 uint8_t rr_flags;
253 uint16_t rr_maxdelay;
254 uint32_t rr_reserved;
255 };
256
257#define rr_type rr_hdr.icmp6_type
258#define rr_code rr_hdr.icmp6_code
259#define rr_cksum rr_hdr.icmp6_cksum
260#define rr_seqnum rr_hdr.icmp6_data32[0]
261
262/* Router renumbering flags */
263#define ICMP6_RR_FLAGS_TEST 0x80
264#define ICMP6_RR_FLAGS_REQRESULT 0x40
265#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
266#define ICMP6_RR_FLAGS_SPECSITE 0x10
267#define ICMP6_RR_FLAGS_PREVDONE 0x08
268
269struct rr_pco_match /* match prefix part */
270 {
271 uint8_t rpm_code;
272 uint8_t rpm_len;
273 uint8_t rpm_ordinal;
274 uint8_t rpm_matchlen;
275 uint8_t rpm_minlen;
276 uint8_t rpm_maxlen;
277 uint16_t rpm_reserved;
278 struct in6_addr rpm_prefix;
279 };
280
281/* PCO code values */
282#define RPM_PCO_ADD 1
283#define RPM_PCO_CHANGE 2
284#define RPM_PCO_SETGLOBAL 3
285
286struct rr_pco_use /* use prefix part */
287 {
288 uint8_t rpu_uselen;
289 uint8_t rpu_keeplen;
290 uint8_t rpu_ramask;
291 uint8_t rpu_raflags;
292 uint32_t rpu_vltime;
293 uint32_t rpu_pltime;
294 uint32_t rpu_flags;
295 struct in6_addr rpu_prefix;
296 };
297
298#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x20
299#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x10
300
301#if BYTE_ORDER == BIG_ENDIAN
302# define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80000000
303# define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40000000
304#elif BYTE_ORDER == LITTLE_ENDIAN
305# define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME 0x80
306# define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME 0x40
307#endif
308
309struct rr_result /* router renumbering result message */
310 {
311 uint16_t rrr_flags;
312 uint8_t rrr_ordinal;
313 uint8_t rrr_matchedlen;
314 uint32_t rrr_ifid;
315 struct in6_addr rrr_prefix;
316 };
317
318#if BYTE_ORDER == BIG_ENDIAN
319# define ICMP6_RR_RESULT_FLAGS_OOB 0x0002
320# define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0001
321#elif BYTE_ORDER == LITTLE_ENDIAN
322# define ICMP6_RR_RESULT_FLAGS_OOB 0x0200
323# define ICMP6_RR_RESULT_FLAGS_FORBIDDEN 0x0100
324#endif
325
326/* Mobile IPv6 extension: Advertisement Interval. */
327struct nd_opt_adv_interval
328 {
329 uint8_t nd_opt_adv_interval_type;
330 uint8_t nd_opt_adv_interval_len;
331 uint16_t nd_opt_adv_interval_reserved;
332 uint32_t nd_opt_adv_interval_ival;
333 };
334
335/* Mobile IPv6 extension: Home Agent Info. */
336struct nd_opt_home_agent_info
337 {
338 uint8_t nd_opt_home_agent_info_type;
339 uint8_t nd_opt_home_agent_info_len;
340 uint16_t nd_opt_home_agent_info_reserved;
341 uint16_t nd_opt_home_agent_info_preference;
342 uint16_t nd_opt_home_agent_info_lifetime;
343 };
344
345#endif /* netinet/icmpv6.h */
346