ip_icmp.h revision 1.38
1 /* $NetBSD: ip_icmp.h,v 1.38 2018/01/23 07:15:04 maxv 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 59 union { 60 int32_t ih_void; 61 62 /* Extended Header (RFC4884) */ 63 struct ih_exthdr { 64 u_int8_t iex_void1; 65 u_int8_t iex_length; 66 u_int16_t iex_void2; 67 } ih_exthdr __packed; 68 69 /* ICMP_PARAMPROB */ 70 u_int8_t ih_pptr; 71 72 /* ICMP_REDIRECT */ 73 struct in_addr ih_gwaddr; 74 75 /* ICMP_ECHO and friends */ 76 struct ih_idseq { 77 n_short icd_id; 78 n_short icd_seq; 79 } ih_idseq __packed; 80 81 /* ICMP_UNREACH_NEEDFRAG (Path MTU Discovery, RFC1191) */ 82 struct ih_pmtu { 83 n_short ipm_void; 84 n_short ipm_nextmtu; 85 } ih_pmtu __packed; 86 87 /* ICMP_ROUTERADVERT */ 88 struct ih_rtradv { 89 u_int8_t irt_num_addrs; 90 u_int8_t irt_wpa; 91 u_int16_t irt_lifetime; 92 } ih_rtradv __packed; 93 } icmp_hun /* XXX __packed ??? */; 94 95 #define icmp_pptr icmp_hun.ih_pptr 96 #define icmp_gwaddr icmp_hun.ih_gwaddr 97 #define icmp_id icmp_hun.ih_idseq.icd_id 98 #define icmp_seq icmp_hun.ih_idseq.icd_seq 99 #define icmp_void icmp_hun.ih_void 100 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 101 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 102 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 103 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 104 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 105 106 union { 107 /* ICMP_TSTAMP and friends */ 108 struct id_ts { 109 n_time its_otime; 110 n_time its_rtime; 111 n_time its_ttime; 112 } id_ts __packed; 113 114 struct id_ip { 115 struct ip idi_ip; 116 /* options and then 64 bits of data */ 117 } id_ip /* XXX: __packed ??? */; 118 119 /* ICMP_ROUTERADVERT */ 120 struct icmp_ra_addr id_radv; 121 122 /* ICMP_MASKREQ and friends */ 123 u_int32_t id_mask; 124 125 int8_t id_data[1]; 126 } icmp_dun /* XXX __packed ??? */; 127 128 #define icmp_otime icmp_dun.id_ts.its_otime 129 #define icmp_rtime icmp_dun.id_ts.its_rtime 130 #define icmp_ttime icmp_dun.id_ts.its_ttime 131 #define icmp_ip icmp_dun.id_ip.idi_ip 132 #define icmp_radv icmp_dun.id_radv 133 #define icmp_mask icmp_dun.id_mask 134 #define icmp_data icmp_dun.id_data 135 }; 136 137 #define ICMP_EXT_VERSION 2 138 #define ICMP_EXT_OFFSET 128 139 140 /* 141 * ICMP Extension Structure Header (RFC4884). 142 */ 143 struct icmp_ext_hdr { 144 #if BYTE_ORDER == BIG_ENDIAN 145 u_int8_t version:4; 146 u_int8_t rsvd1:4; 147 #else 148 u_int8_t rsvd1:4; 149 u_int8_t version:4; 150 #endif 151 u_int8_t rsvd2; 152 u_int16_t checksum; 153 } __packed; 154 155 /* 156 * ICMP Extension Object Header (RFC4884). 157 */ 158 struct icmp_ext_obj_hdr { 159 u_int16_t length; 160 u_int8_t class_num; 161 u_int8_t c_type; 162 } __packed; 163 164 /* 165 * Lower bounds on packet lengths for various types. 166 * For the error advice packets must first insure that the 167 * packet is large enought to contain the returned ip header. 168 * Only then can we do the check to see if 64 bits of packet 169 * data have been returned, since we need to check the returned 170 * ip header length. 171 */ 172 #define ICMP_MINLEN 8 /* abs minimum */ 173 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 174 #define ICMP_MASKLEN 12 /* address mask */ 175 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 176 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 177 /* N.B.: must separately check that ip_hl >= 5 */ 178 179 /* 180 * Definition of type and code field values. 181 */ 182 #define ICMP_ECHOREPLY 0 /* echo reply */ 183 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 184 #define ICMP_UNREACH_NET 0 /* bad net */ 185 #define ICMP_UNREACH_HOST 1 /* bad host */ 186 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 187 #define ICMP_UNREACH_PORT 3 /* bad port */ 188 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 189 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 190 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 191 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 192 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 193 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 194 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 195 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 196 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 197 #define ICMP_UNREACH_ADMIN_PROHIBIT 13 /* communication 198 administratively 199 prohibited */ 200 #define ICMP_UNREACH_HOST_PREC 14 /* host precedence 201 violation */ 202 #define ICMP_UNREACH_PREC_CUTOFF 15 /* precedence cutoff */ 203 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 204 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 205 #define ICMP_REDIRECT_NET 0 /* for network */ 206 #define ICMP_REDIRECT_HOST 1 /* for host */ 207 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 208 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 209 #define ICMP_ALTHOSTADDR 6 /* alternative host address */ 210 #define ICMP_ECHO 8 /* echo service */ 211 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 212 #define ICMP_ROUTERADVERT_NORMAL 0 213 #define ICMP_ROUTERADVERT_NOROUTE 16 214 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 215 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 216 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 217 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 218 #define ICMP_PARAMPROB 12 /* ip header bad */ 219 #define ICMP_PARAMPROB_ERRATPTR 0 220 #define ICMP_PARAMPROB_OPTABSENT 1 221 #define ICMP_PARAMPROB_LENGTH 2 222 #define ICMP_TSTAMP 13 /* timestamp request */ 223 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 224 #define ICMP_IREQ 15 /* information request */ 225 #define ICMP_IREQREPLY 16 /* information reply */ 226 #define ICMP_MASKREQ 17 /* address mask request */ 227 #define ICMP_MASKREPLY 18 /* address mask reply */ 228 #define ICMP_TRACEROUTE 30 /* traceroute */ 229 #define ICMP_DATACONVERR 31 /* data conversion error */ 230 #define ICMP_MOBILE_REDIRECT 32 /* mobile redirect */ 231 #define ICMP_IPV6_WHEREAREYOU 33 /* ipv6 where are you */ 232 #define ICMP_IPV6_IAMHERE 34 /* ipv6 i am here */ 233 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 234 #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ 235 #define ICMP_SKIP 39 /* SKIP */ 236 #define ICMP_PHOTURIS 40 /* security */ 237 #define ICMP_PHOTURIS_UNKNOWN_INDEX 0 /* unknown sec index */ 238 #define ICMP_PHOTURIS_AUTH_FAILED 1 /* auth failed */ 239 #define ICMP_PHOTURIS_DECOMPRESS_FAILED 2 /* decompress failed */ 240 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 241 #define ICMP_PHOTURIS_NEED_AUTHN 4 /* no authentication */ 242 #define ICMP_PHOTURIS_NEED_AUTHZ 5 /* no authorization */ 243 244 #define ICMP_MAXTYPE 40 245 #define ICMP_NTYPES (ICMP_MAXTYPE + 1) 246 247 #ifdef ICMP_STRINGS 248 static const char *icmp_type[] = { 249 "echoreply", "unassigned_1", "unassigned_2", "unreach", 250 "sourcequench", "redirect", "althostaddr", "unassigned_7", 251 "echo", "routeradvert", "routersolicit", "timxceed", 252 "paramprob", "tstamp", "tstampreply", "ireq", 253 "ireqreply", "maskreq", "maskreply", "reserved_19", 254 "reserved_20", "reserved_21", "reserved_22", "reserved_23", 255 "reserved_24", "reserved_25", "reserved_26", "reserved_27", 256 "reserved_28", "reserved_29", "traceroute", "dataconverr", 257 "mobile_redirect", "ipv6_whereareyou", "ipv6_iamhere", 258 "mobile_regrequest", "mobile_regreply", "reserved_37", 259 "reserved_38", "skip", "photuris", NULL 260 }; 261 static const char *icmp_code_none[] = { "none", NULL }; 262 static const char *icmp_code_unreach[] = { 263 "net", "host", "oprt", "needfrag", "srcfail", "net_unknown", 264 "host_unknown", "isolated", "net_prohib", "host_prohib", 265 "tosnet", "toshost", "admin_prohibit", "host_prec", "prec_cutoff", NULL 266 }; 267 static const char *icmp_code_redirect[] = { 268 "net", "host", "tosnet", "toshost", NULL 269 }; 270 static const char *icmp_code_routeradvert[] = { 271 "normal", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", 272 "noroute", NULL 273 }; 274 static const char *icmp_code_timxceed[] = { 275 "intrans", "reass", NULL 276 }; 277 static const char *icmp_code_paramprob[] = { 278 "erratptr", "optabsent", "length", NULL 279 }; 280 static const char *icmp_code_photuris[] = { 281 "unknown_index", "auth_failed", "decompress_failed", 282 "decrypt_failed", "need_authn", "need_authz", NULL 283 }; 284 #endif 285 286 #define ICMP_INFOTYPE(type) \ 287 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 288 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 289 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 290 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 291 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 292 293 #ifdef _KERNEL 294 void icmp_error(struct mbuf *, int, int, n_long, int); 295 void icmp_mtudisc(struct icmp *, struct in_addr); 296 void icmp_input(struct mbuf *, ...); 297 void icmp_init(void); 298 void icmp_reflect(struct mbuf *); 299 int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 300 301 void icmp_mtudisc_callback_register(void (*)(struct in_addr)); 302 int icmp_ratelimit(const struct in_addr *, const int, const int); 303 void icmp_mtudisc_lock(void); 304 void icmp_mtudisc_unlock(void); 305 #endif 306 307 308 #endif /* !_NETINET_IP_ICMP_H_ */ 309
Indexes created Mon Oct 13 16:09:52 GMT 2025