/* $OpenBSD: ip_icmp.h,v 1.31 2018/11/05 21:50:39 claudio Exp $ */ /* $NetBSD: ip_icmp.h,v 1.10 1996/02/13 23:42:28 christos 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. * RFC 950, August 1985. (Address Mask Request / Reply) * RFC 1256, September 1991. (Router Advertisement and Solicitation) * RFC 1108, November 1991. (Param Problem, Missing Req. Option) * RFC 1393, January 1993. (Traceroute) * RFC 1475, June 1993. (Datagram Conversion Error) * RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff) * RFC 2002, October 1996. (Mobility changes to Router Advertisement) */ /* * ICMP Router Advertisement data */ struct icmp_ra_addr { u_int32_t ira_addr; u_int32_t ira_preference; }; /* * Structure of an icmp header. */ struct icmp { u_int8_t icmp_type; /* type of message, see below */ u_int8_t icmp_code; /* type sub code */ u_int16_t icmp_cksum; /* ones complement cksum of struct */ union { u_int8_t ih_pptr; /* ICMP_PARAMPROB */ struct ih_exthdr { /* RFC4884 extended header */ u_int8_t iex_pad; u_int8_t iex_length; } ih_exthdr; struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ struct ih_idseq { u_int16_t icd_id; u_int16_t icd_seq; } ih_idseq; int32_t ih_void; /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ struct ih_pmtu { u_int16_t ipm_void; u_int16_t ipm_nextmtu; } ih_pmtu; struct ih_rtradv { u_int8_t irt_num_addrs; u_int8_t irt_wpa; u_int16_t irt_lifetime; } ih_rtradv; } icmp_hun; #define icmp_pptr icmp_hun.ih_pptr #define icmp_length icmp_hun.ih_exthdr.iex_length #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 { struct id_ts { u_int32_t its_otime; u_int32_t its_rtime; u_int32_t its_ttime; } id_ts; struct id_ip { struct ip idi_ip; /* options and then 64 bits of data */ } id_ip; u_int32_t id_mask; int8_t id_data[1]; } icmp_dun; #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_mask icmp_dun.id_mask #define icmp_data icmp_dun.id_data }; struct icmp_ext_hdr { u_int8_t ieh_version; /* only high nibble used */ u_int8_t ieh_res; /* reserved, must be zero */ u_int16_t ieh_cksum; /* ones complement cksum of ext hdr */ }; #define ICMP_EXT_HDR_VERSION 0x20 #define ICMP_EXT_HDR_VMASK 0xf0 #define ICMP_EXT_OFFSET 128 struct icmp_ext_obj_hdr { u_int16_t ieo_length; /* length of obj incl this header */ u_int8_t ieo_cnum; /* class number */ u_int8_t ieo_ctype; /* sub class type */ }; #define ICMP_EXT_MPLS 1 #define ICMP_EXT_IFINFO 2 /* * For IPv6 transition related ICMP errors. */ #define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40) #define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40) /* * Lower bounds on packet lengths for various types. * For the error advice packets must first insure that the * packet is large enough 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 (u_int32_t)) /* timestamp */ #define ICMP_MASKLEN 12 /* address mask */ #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ #define ICMP_ADVLENMAX (8 + 60 + 40) /* maximum */ #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. * https://www.iana.org/assignments/icmp-parameters */ #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 /* for crypto devs */ #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_FILTER_PROHIB 13 /* prohibited access */ #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/ #define ICMP_UNREACH_PRECEDENCE_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 /* alternate host address */ #define ICMP_ECHO 8 /* echo service */ #define ICMP_ROUTERADVERT 9 /* router advertisement */ #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */ #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */ #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 /* req. opt. absent */ #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ #define ICMP_PARAMPROB_LENGTH 2 /* bad length */ #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 host 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 /* Photuris */ #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */ #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */ #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ #define ICMP_MAXTYPE 40 #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 struct mbuf * icmp_do_error(struct mbuf *, int, int, u_int32_t, int); void icmp_error(struct mbuf *, int, int, u_int32_t, int); int icmp_input(struct mbuf **, int *, int, int); void icmp_init(void); int icmp_reflect(struct mbuf *, struct mbuf **, struct in_ifaddr *); void icmp_send(struct mbuf *, struct mbuf *); int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t); struct rtentry * icmp_mtudisc_clone(struct in_addr, u_int); void icmp_mtudisc(struct icmp *, u_int); int icmp_do_exthdr(struct mbuf *, u_int16_t, u_int8_t, void *, size_t); #endif /* _KERNEL */ #endif /* _NETINET_IP_ICMP_H_ */