/* $NetBSD: ip_icmp.h,v 1.40 2018/09/14 05:09:51 maxv Exp $ */ /* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93 */ #ifndef _NETINET_IP_ICMP_H_ #define _NETINET_IP_ICMP_H_ /* * Interface Control Message Protocol Definitions. * Per RFC 792, September 1981. */ /* * Internal of an ICMP Router Advertisement */ struct icmp_ra_addr { uint32_t ira_addr; uint32_t ira_preference; } __packed; /* * Structure of an icmp header. */ struct icmp { uint8_t icmp_type; /* type of message, see below */ uint8_t icmp_code; /* type sub code */ uint16_t icmp_cksum; /* ones complement cksum of struct */ union { int32_t ih_void; /* Extended Header (RFC4884) */ struct ih_exthdr { uint8_t iex_void1; uint8_t iex_length; uint16_t iex_void2; } ih_exthdr __packed; /* ICMP_PARAMPROB */ uint8_t ih_pptr; /* ICMP_REDIRECT */ struct in_addr ih_gwaddr; /* ICMP_ECHO and friends */ struct ih_idseq { uint16_t icd_id; uint16_t icd_seq; } ih_idseq __packed; /* ICMP_UNREACH_NEEDFRAG (Path MTU Discovery, RFC1191) */ struct ih_pmtu { uint16_t ipm_void; uint16_t ipm_nextmtu; } ih_pmtu __packed; /* ICMP_ROUTERADVERT */ struct ih_rtradv { uint8_t irt_num_addrs; uint8_t irt_wpa; uint16_t irt_lifetime; } ih_rtradv __packed; } icmp_hun /* XXX __packed ??? */; #define icmp_pptr icmp_hun.ih_pptr #define icmp_gwaddr icmp_hun.ih_gwaddr #define icmp_id icmp_hun.ih_idseq.icd_id #define icmp_seq icmp_hun.ih_idseq.icd_seq #define icmp_void icmp_hun.ih_void #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime union { /* ICMP_TSTAMP and friends */ struct id_ts { uint32_t its_otime; uint32_t its_rtime; uint32_t its_ttime; } id_ts __packed; struct id_ip { struct ip idi_ip; /* options and then 64 bits of data */ } id_ip /* XXX: __packed ??? */; /* ICMP_ROUTERADVERT */ struct icmp_ra_addr id_radv; /* ICMP_MASKREQ and friends */ uint32_t id_mask; int8_t id_data[1]; } icmp_dun /* XXX __packed ??? */; #define icmp_otime icmp_dun.id_ts.its_otime #define icmp_rtime icmp_dun.id_ts.its_rtime #define icmp_ttime icmp_dun.id_ts.its_ttime #define icmp_ip icmp_dun.id_ip.idi_ip #define icmp_radv icmp_dun.id_radv #define icmp_mask icmp_dun.id_mask #define icmp_data icmp_dun.id_data }; #define ICMP_EXT_VERSION 2 #define ICMP_EXT_OFFSET 128 /* * ICMP Extension Structure Header (RFC4884). */ struct icmp_ext_hdr { #if BYTE_ORDER == BIG_ENDIAN uint8_t version:4; uint8_t rsvd1:4; #else uint8_t rsvd1:4; uint8_t version:4; #endif uint8_t rsvd2; uint16_t checksum; } __packed; /* * ICMP Extension Object Header (RFC4884). */ struct icmp_ext_obj_hdr { uint16_t length; uint8_t class_num; uint8_t c_type; } __packed; /* * Lower bounds on packet lengths for various types. * For the error advice packets must first insure that the * packet is large enought to contain the returned ip header. * Only then can we do the check to see if 64 bits of packet * data have been returned, since we need to check the returned * ip header length. */ #define ICMP_MINLEN 8 /* abs minimum */ #define ICMP_TSLEN (8 + 3 * sizeof(uint32_t)) /* timestamp */ #define ICMP_MASKLEN 12 /* address mask */ #define ICMP_ADVLENMIN (8 + sizeof(struct ip) + 8) /* min */ #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) /* N.B.: must separately check that ip_hl >= 5 */ /* * Definition of type and code field values. */ #define ICMP_ECHOREPLY 0 /* echo reply */ #define ICMP_UNREACH 3 /* dest unreachable, codes: */ #define ICMP_UNREACH_NET 0 /* bad net */ #define ICMP_UNREACH_HOST 1 /* bad host */ #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ #define ICMP_UNREACH_PORT 3 /* bad port */ #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ #define ICMP_UNREACH_ADMIN_PROHIBIT 13 /* communication administratively prohibited */ #define ICMP_UNREACH_HOST_PREC 14 /* host precedence violation */ #define ICMP_UNREACH_PREC_CUTOFF 15 /* precedence cutoff */ #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ #define ICMP_REDIRECT 5 /* shorter route, codes: */ #define ICMP_REDIRECT_NET 0 /* for network */ #define ICMP_REDIRECT_HOST 1 /* for host */ #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ #define ICMP_ALTHOSTADDR 6 /* alternative host address */ #define ICMP_ECHO 8 /* echo service */ #define ICMP_ROUTERADVERT 9 /* router advertisement */ #define ICMP_ROUTERADVERT_NORMAL 0 #define ICMP_ROUTERADVERT_NOROUTE 16 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ #define ICMP_TIMXCEED 11 /* time exceeded, code: */ #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ #define ICMP_PARAMPROB 12 /* ip header bad */ #define ICMP_PARAMPROB_ERRATPTR 0 #define ICMP_PARAMPROB_OPTABSENT 1 #define ICMP_PARAMPROB_LENGTH 2 #define ICMP_TSTAMP 13 /* timestamp request */ #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ #define ICMP_IREQ 15 /* information request */ #define ICMP_IREQREPLY 16 /* information reply */ #define ICMP_MASKREQ 17 /* address mask request */ #define ICMP_MASKREPLY 18 /* address mask reply */ #define ICMP_TRACEROUTE 30 /* traceroute */ #define ICMP_DATACONVERR 31 /* data conversion error */ #define ICMP_MOBILE_REDIRECT 32 /* mobile redirect */ #define ICMP_IPV6_WHEREAREYOU 33 /* ipv6 where are you */ #define ICMP_IPV6_IAMHERE 34 /* ipv6 i am here */ #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ #define ICMP_SKIP 39 /* SKIP */ #define ICMP_PHOTURIS 40 /* security */ #define ICMP_PHOTURIS_UNKNOWN_INDEX 0 /* unknown sec index */ #define ICMP_PHOTURIS_AUTH_FAILED 1 /* auth failed */ #define ICMP_PHOTURIS_DECOMPRESS_FAILED 2 /* decompress failed */ #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ #define ICMP_PHOTURIS_NEED_AUTHN 4 /* no authentication */ #define ICMP_PHOTURIS_NEED_AUTHZ 5 /* no authorization */ #define ICMP_MAXTYPE 40 #define ICMP_NTYPES (ICMP_MAXTYPE + 1) #ifdef ICMP_STRINGS static const char *icmp_type[] = { "echoreply", "unassigned_1", "unassigned_2", "unreach", "sourcequench", "redirect", "althostaddr", "unassigned_7", "echo", "routeradvert", "routersolicit", "timxceed", "paramprob", "tstamp", "tstampreply", "ireq", "ireqreply", "maskreq", "maskreply", "reserved_19", "reserved_20", "reserved_21", "reserved_22", "reserved_23", "reserved_24", "reserved_25", "reserved_26", "reserved_27", "reserved_28", "reserved_29", "traceroute", "dataconverr", "mobile_redirect", "ipv6_whereareyou", "ipv6_iamhere", "mobile_regrequest", "mobile_regreply", "reserved_37", "reserved_38", "skip", "photuris", NULL }; static const char *icmp_code_none[] = { "none", NULL }; static const char *icmp_code_unreach[] = { "net", "host", "oprt", "needfrag", "srcfail", "net_unknown", "host_unknown", "isolated", "net_prohib", "host_prohib", "tosnet", "toshost", "admin_prohibit", "host_prec", "prec_cutoff", NULL }; static const char *icmp_code_redirect[] = { "net", "host", "tosnet", "toshost", NULL }; static const char *icmp_code_routeradvert[] = { "normal", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "noroute", NULL }; static const char *icmp_code_timxceed[] = { "intrans", "reass", NULL }; static const char *icmp_code_paramprob[] = { "erratptr", "optabsent", "length", NULL }; static const char *icmp_code_photuris[] = { "unknown_index", "auth_failed", "decompress_failed", "decrypt_failed", "need_authn", "need_authz", NULL }; #endif #define ICMP_INFOTYPE(type) \ ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) #ifdef _KERNEL void icmp_error(struct mbuf *, int, int, n_long, int); void icmp_mtudisc(struct icmp *, struct in_addr); void icmp_input(struct mbuf *, int, int); void icmp_init(void); void icmp_reflect(struct mbuf *); void icmp_mtudisc_callback_register(void (*)(struct in_addr)); int icmp_ratelimit(const struct in_addr *, const int, const int); void icmp_mtudisc_lock(void); void icmp_mtudisc_unlock(void); #endif #endif /* !_NETINET_IP_ICMP_H_ */