| 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 | |