1 | /* $NetBSD: ip_icmp.h,v 1.34 2015/02/18 17:00:15 christos Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1982, 1986, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. Neither the name of the University nor the names of its contributors |
16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | * |
31 | * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 |
32 | */ |
33 | |
34 | #ifndef _NETINET_IP_ICMP_H_ |
35 | #define _NETINET_IP_ICMP_H_ |
36 | |
37 | |
38 | /* |
39 | * Interface Control Message Protocol Definitions. |
40 | * Per RFC 792, September 1981. |
41 | */ |
42 | |
43 | /* |
44 | * Internal of an ICMP Router Advertisement |
45 | */ |
46 | struct icmp_ra_addr { |
47 | u_int32_t ira_addr; |
48 | u_int32_t ira_preference; |
49 | } __packed; |
50 | |
51 | /* |
52 | * Structure of an icmp header. |
53 | */ |
54 | struct icmp { |
55 | u_int8_t icmp_type; /* type of message, see below */ |
56 | u_int8_t icmp_code; /* type sub code */ |
57 | u_int16_t icmp_cksum; /* ones complement cksum of struct */ |
58 | union { |
59 | u_int8_t ih_pptr; /* ICMP_PARAMPROB */ |
60 | struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
61 | struct ih_idseq { |
62 | n_short icd_id; |
63 | n_short icd_seq; |
64 | } ih_idseq __packed; |
65 | int32_t ih_void; |
66 | |
67 | /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
68 | struct ih_pmtu { |
69 | n_short ipm_void; |
70 | n_short ipm_nextmtu; |
71 | } ih_pmtu __packed; |
72 | struct ih_rtradv { |
73 | u_int8_t irt_num_addrs; |
74 | u_int8_t irt_wpa; |
75 | u_int16_t irt_lifetime; |
76 | } ih_rtradv __packed; |
77 | } icmp_hun /* XXX __packed ??? */; |
78 | #define icmp_pptr icmp_hun.ih_pptr |
79 | #define icmp_gwaddr icmp_hun.ih_gwaddr |
80 | #define icmp_id icmp_hun.ih_idseq.icd_id |
81 | #define icmp_seq icmp_hun.ih_idseq.icd_seq |
82 | #define icmp_void icmp_hun.ih_void |
83 | #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void |
84 | #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu |
85 | #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs |
86 | #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa |
87 | #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime |
88 | union { |
89 | struct id_ts { |
90 | n_time its_otime; |
91 | n_time its_rtime; |
92 | n_time its_ttime; |
93 | } id_ts __packed; |
94 | struct id_ip { |
95 | struct ip idi_ip; |
96 | /* options and then 64 bits of data */ |
97 | } id_ip /* XXX: __packed ??? */; |
98 | struct icmp_ra_addr id_radv; |
99 | u_int32_t id_mask; |
100 | int8_t id_data[1]; |
101 | } icmp_dun /* XXX __packed ??? */; |
102 | #define icmp_otime icmp_dun.id_ts.its_otime |
103 | #define icmp_rtime icmp_dun.id_ts.its_rtime |
104 | #define icmp_ttime icmp_dun.id_ts.its_ttime |
105 | #define icmp_ip icmp_dun.id_ip.idi_ip |
106 | #define icmp_radv icmp_dun.id_mask |
107 | #define icmp_mask icmp_dun.id_mask |
108 | #define icmp_data icmp_dun.id_data |
109 | }; |
110 | |
111 | /* |
112 | * Lower bounds on packet lengths for various types. |
113 | * For the error advice packets must first insure that the |
114 | * packet is large enought to contain the returned ip header. |
115 | * Only then can we do the check to see if 64 bits of packet |
116 | * data have been returned, since we need to check the returned |
117 | * ip header length. |
118 | */ |
119 | #define ICMP_MINLEN 8 /* abs minimum */ |
120 | #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
121 | #define ICMP_MASKLEN 12 /* address mask */ |
122 | #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
123 | #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
124 | /* N.B.: must separately check that ip_hl >= 5 */ |
125 | |
126 | /* |
127 | * Definition of type and code field values. |
128 | */ |
129 | #define ICMP_ECHOREPLY 0 /* echo reply */ |
130 | #define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
131 | #define ICMP_UNREACH_NET 0 /* bad net */ |
132 | #define ICMP_UNREACH_HOST 1 /* bad host */ |
133 | #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
134 | #define ICMP_UNREACH_PORT 3 /* bad port */ |
135 | #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
136 | #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
137 | #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
138 | #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
139 | #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
140 | #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ |
141 | #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
142 | #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
143 | #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
144 | #define ICMP_UNREACH_ADMIN_PROHIBIT 13 /* communication |
145 | administratively |
146 | prohibited */ |
147 | #define ICMP_UNREACH_HOST_PREC 14 /* host precedence |
148 | violation */ |
149 | #define ICMP_UNREACH_PREC_CUTOFF 15 /* precedence cutoff */ |
150 | #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
151 | #define ICMP_REDIRECT 5 /* shorter route, codes: */ |
152 | #define ICMP_REDIRECT_NET 0 /* for network */ |
153 | #define ICMP_REDIRECT_HOST 1 /* for host */ |
154 | #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
155 | #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
156 | #define ICMP_ALTHOSTADDR 6 /* alternative host address */ |
157 | #define ICMP_ECHO 8 /* echo service */ |
158 | #define ICMP_ROUTERADVERT 9 /* router advertisement */ |
159 | #define ICMP_ROUTERADVERT_NORMAL 0 |
160 | #define ICMP_ROUTERADVERT_NOROUTE 16 |
161 | #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
162 | #define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
163 | #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
164 | #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
165 | #define ICMP_PARAMPROB 12 /* ip header bad */ |
166 | #define ICMP_PARAMPROB_ERRATPTR 0 |
167 | #define ICMP_PARAMPROB_OPTABSENT 1 |
168 | #define ICMP_PARAMPROB_LENGTH 2 |
169 | #define ICMP_TSTAMP 13 /* timestamp request */ |
170 | #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
171 | #define ICMP_IREQ 15 /* information request */ |
172 | #define ICMP_IREQREPLY 16 /* information reply */ |
173 | #define ICMP_MASKREQ 17 /* address mask request */ |
174 | #define ICMP_MASKREPLY 18 /* address mask reply */ |
175 | #define ICMP_TRACEROUTE 30 /* traceroute */ |
176 | #define ICMP_DATACONVERR 31 /* data conversion error */ |
177 | #define ICMP_MOBILE_REDIRECT 32 /* mobile redirect */ |
178 | #define ICMP_IPV6_WHEREAREYOU 33 /* ipv6 where are you */ |
179 | #define ICMP_IPV6_IAMHERE 34 /* ipv6 i am here */ |
180 | #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ |
181 | #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ |
182 | #define ICMP_SKIP 39 /* SKIP */ |
183 | #define ICMP_PHOTURIS 40 /* security */ |
184 | #define ICMP_PHOTURIS_UNKNOWN_INDEX 0 /* unknown sec index */ |
185 | #define ICMP_PHOTURIS_AUTH_FAILED 1 /* auth failed */ |
186 | #define ICMP_PHOTURIS_DECOMPRESS_FAILED 2 /* decompress failed */ |
187 | #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ |
188 | #define ICMP_PHOTURIS_NEED_AUTHN 4 /* no authentication */ |
189 | #define ICMP_PHOTURIS_NEED_AUTHZ 5 /* no authorization */ |
190 | |
191 | #define ICMP_MAXTYPE 40 |
192 | #define ICMP_NTYPES (ICMP_MAXTYPE + 1) |
193 | |
194 | #ifdef ICMP_STRINGS |
195 | static const char *icmp_type[] = { |
196 | "echoreply" , "unassigned_1" , "unassigned_2" , "unreach" , |
197 | "sourcequench" , "redirect" , "althostaddr" , "unassigned_7" , |
198 | "echo" , "routeradvert" , "routersolicit" , "timxceed" , |
199 | "paramprob" , "tstamp" , "tstampreply" , "ireq" , |
200 | "ireqreply" , "maskreq" , "maskreply" , "reserved_19" , |
201 | "reserved_20" , "reserved_21" , "reserved_22" , "reserved_23" , |
202 | "reserved_24" , "reserved_25" , "reserved_26" , "reserved_27" , |
203 | "reserved_28" , "reserved_29" , "traceroute" , "dataconverr" , |
204 | "mobile_redirect" , "ipv6_whereareyou" , "ipv6_iamhere" , |
205 | "mobile_regrequest" , "mobile_regreply" , "reserved_37" , |
206 | "reserved_38" , "skip" , "photuris" , NULL |
207 | }; |
208 | static const char *icmp_code_none[] = { "none" , NULL }; |
209 | static const char *icmp_code_unreach[] = { |
210 | "net" , "host" , "oprt" , "needfrag" , "srcfail" , "net_unknown" , |
211 | "host_unknown" , "isolated" , "net_prohib" , "host_prohib" , |
212 | "tosnet" , "toshost" , "admin_prohibit" , "host_prec" , "prec_cutoff" , NULL |
213 | }; |
214 | static const char *icmp_code_redirect[] = { |
215 | "net" , "host" , "tosnet" , "toshost" , NULL |
216 | }; |
217 | static const char *icmp_code_routeradvert[] = { |
218 | "normal" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , "" , |
219 | "noroute" , NULL |
220 | }; |
221 | static const char *icmp_code_timxceed[] = { |
222 | "intrans" , "reass" , NULL |
223 | }; |
224 | static const char *icmp_code_paramprob[] = { |
225 | "erratptr" , "optabsent" , "length" , NULL |
226 | }; |
227 | static const char *icmp_code_photuris[] = { |
228 | "unknown_index" , "auth_failed" , "decompress_failed" , |
229 | "decrypt_failed" , "need_authn" , "need_authz" , NULL |
230 | }; |
231 | #endif |
232 | |
233 | #define ICMP_INFOTYPE(type) \ |
234 | ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
235 | (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
236 | (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
237 | (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
238 | (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
239 | |
240 | #ifdef _KERNEL |
241 | void icmp_error(struct mbuf *, int, int, n_long, int); |
242 | void icmp_mtudisc(struct icmp *, struct in_addr); |
243 | void icmp_input(struct mbuf *, ...); |
244 | void icmp_init(void); |
245 | void icmp_reflect(struct mbuf *); |
246 | void icmp_send(struct mbuf *, struct mbuf *); |
247 | int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t); |
248 | |
249 | void icmp_mtudisc_callback_register(void (*)(struct in_addr)); |
250 | int icmp_ratelimit(const struct in_addr *, const int, const int); |
251 | #endif |
252 | |
253 | |
254 | #endif /* !_NETINET_IP_ICMP_H_ */ |
255 | |