| 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 |
* 4. 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 |
* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 |
| 30 |
* $MidnightBSD$ |
| 31 |
*/ |
| 32 |
|
| 33 |
#ifndef _NETINET_IP_ICMP_H_ |
| 34 |
#define _NETINET_IP_ICMP_H_ |
| 35 |
|
| 36 |
/* |
| 37 |
* Interface Control Message Protocol Definitions. |
| 38 |
* Per RFC 792, September 1981. |
| 39 |
*/ |
| 40 |
|
| 41 |
/* |
| 42 |
* Internal of an ICMP Router Advertisement |
| 43 |
*/ |
| 44 |
struct icmp_ra_addr { |
| 45 |
u_int32_t ira_addr; |
| 46 |
u_int32_t ira_preference; |
| 47 |
}; |
| 48 |
|
| 49 |
/* |
| 50 |
* Structure of an icmp header. |
| 51 |
*/ |
| 52 |
struct icmphdr { |
| 53 |
u_char icmp_type; /* type of message, see below */ |
| 54 |
u_char icmp_code; /* type sub code */ |
| 55 |
u_short icmp_cksum; /* ones complement cksum of struct */ |
| 56 |
}; |
| 57 |
|
| 58 |
/* |
| 59 |
* Structure of an icmp packet. |
| 60 |
* |
| 61 |
* XXX: should start with a struct icmphdr. |
| 62 |
*/ |
| 63 |
struct icmp { |
| 64 |
u_char icmp_type; /* type of message, see below */ |
| 65 |
u_char icmp_code; /* type sub code */ |
| 66 |
u_short icmp_cksum; /* ones complement cksum of struct */ |
| 67 |
union { |
| 68 |
u_char ih_pptr; /* ICMP_PARAMPROB */ |
| 69 |
struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
| 70 |
struct ih_idseq { |
| 71 |
uint16_t icd_id; /* network format */ |
| 72 |
uint16_t icd_seq; /* network format */ |
| 73 |
} ih_idseq; |
| 74 |
int ih_void; |
| 75 |
|
| 76 |
/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
| 77 |
struct ih_pmtu { |
| 78 |
uint16_t ipm_void; /* network format */ |
| 79 |
uint16_t ipm_nextmtu; /* network format */ |
| 80 |
} ih_pmtu; |
| 81 |
|
| 82 |
struct ih_rtradv { |
| 83 |
u_char irt_num_addrs; |
| 84 |
u_char irt_wpa; |
| 85 |
u_int16_t irt_lifetime; |
| 86 |
} ih_rtradv; |
| 87 |
} icmp_hun; |
| 88 |
#define icmp_pptr icmp_hun.ih_pptr |
| 89 |
#define icmp_gwaddr icmp_hun.ih_gwaddr |
| 90 |
#define icmp_id icmp_hun.ih_idseq.icd_id |
| 91 |
#define icmp_seq icmp_hun.ih_idseq.icd_seq |
| 92 |
#define icmp_void icmp_hun.ih_void |
| 93 |
#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void |
| 94 |
#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu |
| 95 |
#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs |
| 96 |
#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa |
| 97 |
#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime |
| 98 |
union { |
| 99 |
struct id_ts { /* ICMP Timestamp */ |
| 100 |
/* |
| 101 |
* The next 3 fields are in network format, |
| 102 |
* milliseconds since 00:00 GMT |
| 103 |
*/ |
| 104 |
uint32_t its_otime; /* Originate */ |
| 105 |
uint32_t its_rtime; /* Receive */ |
| 106 |
uint32_t its_ttime; /* Transmit */ |
| 107 |
} id_ts; |
| 108 |
struct id_ip { |
| 109 |
struct ip idi_ip; |
| 110 |
/* options and then 64 bits of data */ |
| 111 |
} id_ip; |
| 112 |
struct icmp_ra_addr id_radv; |
| 113 |
u_int32_t id_mask; |
| 114 |
char id_data[1]; |
| 115 |
} icmp_dun; |
| 116 |
#define icmp_otime icmp_dun.id_ts.its_otime |
| 117 |
#define icmp_rtime icmp_dun.id_ts.its_rtime |
| 118 |
#define icmp_ttime icmp_dun.id_ts.its_ttime |
| 119 |
#define icmp_ip icmp_dun.id_ip.idi_ip |
| 120 |
#define icmp_radv icmp_dun.id_radv |
| 121 |
#define icmp_mask icmp_dun.id_mask |
| 122 |
#define icmp_data icmp_dun.id_data |
| 123 |
}; |
| 124 |
|
| 125 |
/* |
| 126 |
* Lower bounds on packet lengths for various types. |
| 127 |
* For the error advice packets must first insure that the |
| 128 |
* packet is large enough to contain the returned ip header. |
| 129 |
* Only then can we do the check to see if 64 bits of packet |
| 130 |
* data have been returned, since we need to check the returned |
| 131 |
* ip header length. |
| 132 |
*/ |
| 133 |
#define ICMP_MINLEN 8 /* abs minimum */ |
| 134 |
#define ICMP_TSLEN (8 + 3 * sizeof (uint32_t)) /* timestamp */ |
| 135 |
#define ICMP_MASKLEN 12 /* address mask */ |
| 136 |
#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
| 137 |
#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
| 138 |
/* N.B.: must separately check that ip_hl >= 5 */ |
| 139 |
|
| 140 |
/* |
| 141 |
* Definition of type and code field values. |
| 142 |
*/ |
| 143 |
#define ICMP_ECHOREPLY 0 /* echo reply */ |
| 144 |
#define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
| 145 |
#define ICMP_UNREACH_NET 0 /* bad net */ |
| 146 |
#define ICMP_UNREACH_HOST 1 /* bad host */ |
| 147 |
#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
| 148 |
#define ICMP_UNREACH_PORT 3 /* bad port */ |
| 149 |
#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
| 150 |
#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
| 151 |
#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
| 152 |
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
| 153 |
#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
| 154 |
#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ |
| 155 |
#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
| 156 |
#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
| 157 |
#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
| 158 |
#define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */ |
| 159 |
#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */ |
| 160 |
#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */ |
| 161 |
#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
| 162 |
#define ICMP_REDIRECT 5 /* shorter route, codes: */ |
| 163 |
#define ICMP_REDIRECT_NET 0 /* for network */ |
| 164 |
#define ICMP_REDIRECT_HOST 1 /* for host */ |
| 165 |
#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
| 166 |
#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
| 167 |
#define ICMP_ALTHOSTADDR 6 /* alternate host address */ |
| 168 |
#define ICMP_ECHO 8 /* echo service */ |
| 169 |
#define ICMP_ROUTERADVERT 9 /* router advertisement */ |
| 170 |
#define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ |
| 171 |
#define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ |
| 172 |
#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
| 173 |
#define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
| 174 |
#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
| 175 |
#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
| 176 |
#define ICMP_PARAMPROB 12 /* ip header bad */ |
| 177 |
#define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */ |
| 178 |
#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ |
| 179 |
#define ICMP_PARAMPROB_LENGTH 2 /* bad length */ |
| 180 |
#define ICMP_TSTAMP 13 /* timestamp request */ |
| 181 |
#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
| 182 |
#define ICMP_IREQ 15 /* information request */ |
| 183 |
#define ICMP_IREQREPLY 16 /* information reply */ |
| 184 |
#define ICMP_MASKREQ 17 /* address mask request */ |
| 185 |
#define ICMP_MASKREPLY 18 /* address mask reply */ |
| 186 |
#define ICMP_TRACEROUTE 30 /* traceroute */ |
| 187 |
#define ICMP_DATACONVERR 31 /* data conversion error */ |
| 188 |
#define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */ |
| 189 |
#define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */ |
| 190 |
#define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */ |
| 191 |
#define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ |
| 192 |
#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ |
| 193 |
#define ICMP_SKIP 39 /* SKIP */ |
| 194 |
#define ICMP_PHOTURIS 40 /* Photuris */ |
| 195 |
#define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ |
| 196 |
#define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ |
| 197 |
#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ |
| 198 |
|
| 199 |
#define ICMP_MAXTYPE 40 |
| 200 |
|
| 201 |
#define ICMP_INFOTYPE(type) \ |
| 202 |
((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
| 203 |
(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
| 204 |
(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
| 205 |
(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
| 206 |
(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
| 207 |
|
| 208 |
#ifdef _KERNEL |
| 209 |
void icmp_error(struct mbuf *, int, int, uint32_t, int); |
| 210 |
void icmp_input(struct mbuf *, int); |
| 211 |
int ip_next_mtu(int, int); |
| 212 |
#endif |
| 213 |
|
| 214 |
#endif |
