user_ip_icmp.h (8440B)
1 /*- 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #ifndef _USER_IP_ICMP_H_ 32 #define _USER_IP_ICMP_H_ 33 34 /* 35 * Interface Control Message Protocol Definitions. 36 * Per RFC 792, September 1981. 37 */ 38 39 /* 40 * Internal of an ICMP Router Advertisement 41 */ 42 struct icmp_ra_addr { 43 uint32_t ira_addr; 44 uint32_t ira_preference; 45 }; 46 47 /* 48 * Structure of an icmp header. 49 */ 50 struct icmphdr { 51 u_char icmp_type; /* type of message, see below */ 52 u_char icmp_code; /* type sub code */ 53 u_short icmp_cksum; /* ones complement cksum of struct */ 54 }; 55 56 #if defined(_WIN32) 57 #pragma pack (push, 1) 58 struct icmp6_hdr { 59 uint8_t icmp6_type; 60 uint8_t icmp6_code; 61 uint16_t icmp6_cksum; 62 union { 63 uint32_t icmp6_un_data32[1]; 64 uint16_t icmp6_un_data16[2]; 65 uint8_t icmp6_un_data8[4]; 66 } icmp6_dataun; 67 }; 68 #pragma pack(pop) 69 70 #define icmp6_data32 icmp6_dataun.icmp6_un_data32 71 #define icmp6_mtu icmp6_data32[0] 72 #endif 73 74 /* 75 * Structure of an icmp packet. 76 * 77 * XXX: should start with a struct icmphdr. 78 */ 79 struct icmp { 80 u_char icmp_type; /* type of message, see below */ 81 u_char icmp_code; /* type sub code */ 82 u_short icmp_cksum; /* ones complement cksum of struct */ 83 union { 84 u_char ih_pptr; /* ICMP_PARAMPROB */ 85 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 86 struct ih_idseq { 87 uint16_t icd_id; /* network format */ 88 uint16_t icd_seq; /* network format */ 89 } ih_idseq; 90 int ih_void; 91 92 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ 93 struct ih_pmtu { 94 uint16_t ipm_void; /* network format */ 95 uint16_t ipm_nextmtu; /* network format */ 96 } ih_pmtu; 97 98 struct ih_rtradv { 99 u_char irt_num_addrs; 100 u_char irt_wpa; 101 uint16_t irt_lifetime; 102 } ih_rtradv; 103 } icmp_hun; 104 #define icmp_pptr icmp_hun.ih_pptr 105 #define icmp_gwaddr icmp_hun.ih_gwaddr 106 #define icmp_id icmp_hun.ih_idseq.icd_id 107 #define icmp_seq icmp_hun.ih_idseq.icd_seq 108 #define icmp_void icmp_hun.ih_void 109 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 110 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 111 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 112 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 113 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 114 union { 115 struct id_ts { /* ICMP Timestamp */ 116 /* 117 * The next 3 fields are in network format, 118 * milliseconds since 00:00 GMT 119 */ 120 uint32_t its_otime; /* Originate */ 121 uint32_t its_rtime; /* Receive */ 122 uint32_t its_ttime; /* Transmit */ 123 } id_ts; 124 struct id_ip { 125 struct ip idi_ip; 126 /* options and then 64 bits of data */ 127 } id_ip; 128 struct icmp_ra_addr id_radv; 129 uint32_t id_mask; 130 char id_data[1]; 131 } icmp_dun; 132 #define icmp_otime icmp_dun.id_ts.its_otime 133 #define icmp_rtime icmp_dun.id_ts.its_rtime 134 #define icmp_ttime icmp_dun.id_ts.its_ttime 135 #define icmp_ip icmp_dun.id_ip.idi_ip 136 #define icmp_radv icmp_dun.id_radv 137 #define icmp_mask icmp_dun.id_mask 138 #define icmp_data icmp_dun.id_data 139 }; 140 141 /* 142 * Lower bounds on packet lengths for various types. 143 * For the error advice packets must first insure that the 144 * packet is large enough to contain the returned ip header. 145 * Only then can we do the check to see if 64 bits of packet 146 * data have been returned, since we need to check the returned 147 * ip header length. 148 */ 149 #define ICMP_MINLEN 8 /* abs minimum */ 150 #define ICMP_TSLEN (8 + 3 * sizeof (uint32_t)) /* timestamp */ 151 #define ICMP_MASKLEN 12 /* address mask */ 152 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 153 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 154 /* N.B.: must separately check that ip_hl >= 5 */ 155 156 /* 157 * Definition of type and code field values. 158 */ 159 #define ICMP_ECHOREPLY 0 /* echo reply */ 160 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 161 #define ICMP_UNREACH_NET 0 /* bad net */ 162 #define ICMP_UNREACH_HOST 1 /* bad host */ 163 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 164 #define ICMP_UNREACH_PORT 3 /* bad port */ 165 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 166 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 167 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ 168 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ 169 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ 170 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ 171 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ 172 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ 173 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ 174 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ 175 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ 176 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ 177 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 178 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 179 #define ICMP_REDIRECT_NET 0 /* for network */ 180 #define ICMP_REDIRECT_HOST 1 /* for host */ 181 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 182 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 183 #define ICMP_ALTHOSTADDR 6 /* alternate host address */ 184 #define ICMP_ECHO 8 /* echo service */ 185 #define ICMP_ROUTERADVERT 9 /* router advertisement */ 186 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ 187 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ 188 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ 189 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 190 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 191 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 192 #define ICMP_PARAMPROB 12 /* ip header bad */ 193 #define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */ 194 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ 195 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */ 196 #define ICMP_TSTAMP 13 /* timestamp request */ 197 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 198 #define ICMP_IREQ 15 /* information request */ 199 #define ICMP_IREQREPLY 16 /* information reply */ 200 #define ICMP_MASKREQ 17 /* address mask request */ 201 #define ICMP_MASKREPLY 18 /* address mask reply */ 202 #define ICMP_TRACEROUTE 30 /* traceroute */ 203 #define ICMP_DATACONVERR 31 /* data conversion error */ 204 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ 205 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ 206 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ 207 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ 208 #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ 209 #define ICMP_SKIP 39 /* SKIP */ 210 #define ICMP_PHOTURIS 40 /* Photuris */ 211 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ 212 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ 213 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ 214 215 #define ICMP_MAXTYPE 40 216 217 #define ICMP_INFOTYPE(type) \ 218 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 219 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ 220 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 221 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 222 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 223 224 225 #endif