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/* $NetBSD: ip_icmp.h,v 1.34 2015/02/18 17:00:15 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IP_ICMP_H_
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#define _NETINET_IP_ICMP_H_
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/*
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* Interface Control Message Protocol Definitions.
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* Per RFC 792, September 1981.
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*/
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/*
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* Internal of an ICMP Router Advertisement
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*/
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struct icmp_ra_addr {
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u_int32_t ira_addr; |
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u_int32_t ira_preference; |
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} __packed; |
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/*
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* Structure of an icmp header.
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*/
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struct icmp {
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u_int8_t icmp_type; /* type of message, see below */
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u_int8_t icmp_code; /* type sub code */
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u_int16_t icmp_cksum; /* ones complement cksum of struct */
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union {
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u_int8_t ih_pptr; /* ICMP_PARAMPROB */
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struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
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struct ih_idseq {
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n_short icd_id; |
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n_short icd_seq; |
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} ih_idseq __packed; |
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int32_t ih_void; |
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/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
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struct ih_pmtu {
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n_short ipm_void; |
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n_short ipm_nextmtu; |
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} ih_pmtu __packed; |
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struct ih_rtradv {
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u_int8_t irt_num_addrs; |
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u_int8_t irt_wpa; |
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u_int16_t irt_lifetime; |
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} ih_rtradv __packed; |
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} icmp_hun /* XXX __packed ??? */;
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#define icmp_pptr icmp_hun.ih_pptr
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#define icmp_gwaddr icmp_hun.ih_gwaddr
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#define icmp_id icmp_hun.ih_idseq.icd_id
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#define icmp_seq icmp_hun.ih_idseq.icd_seq
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#define icmp_void icmp_hun.ih_void
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#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
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#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
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#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
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#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
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#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
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union {
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struct id_ts {
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n_time its_otime; |
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n_time its_rtime; |
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n_time its_ttime; |
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} id_ts __packed; |
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struct id_ip {
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struct ip idi_ip;
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/* options and then 64 bits of data */
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} id_ip /* XXX: __packed ??? */;
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struct icmp_ra_addr id_radv;
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u_int32_t id_mask; |
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int8_t id_data[1];
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} icmp_dun /* XXX __packed ??? */;
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#define icmp_otime icmp_dun.id_ts.its_otime
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#define icmp_rtime icmp_dun.id_ts.its_rtime
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#define icmp_ttime icmp_dun.id_ts.its_ttime
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#define icmp_ip icmp_dun.id_ip.idi_ip
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#define icmp_radv icmp_dun.id_mask
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#define icmp_mask icmp_dun.id_mask
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#define icmp_data icmp_dun.id_data
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}; |
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/*
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* Lower bounds on packet lengths for various types.
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* For the error advice packets must first insure that the
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* packet is large enought to contain the returned ip header.
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* Only then can we do the check to see if 64 bits of packet
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* data have been returned, since we need to check the returned
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* ip header length.
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*/
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#define ICMP_MINLEN 8 /* abs minimum */ |
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#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ |
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#define ICMP_MASKLEN 12 /* address mask */ |
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#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ |
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#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) |
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/* N.B.: must separately check that ip_hl >= 5 */
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/*
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* Definition of type and code field values.
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*/
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#define ICMP_ECHOREPLY 0 /* echo reply */ |
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#define ICMP_UNREACH 3 /* dest unreachable, codes: */ |
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#define ICMP_UNREACH_NET 0 /* bad net */ |
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#define ICMP_UNREACH_HOST 1 /* bad host */ |
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#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ |
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#define ICMP_UNREACH_PORT 3 /* bad port */ |
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#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ |
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#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ |
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#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */ |
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#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */ |
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#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */ |
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#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */ |
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#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
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#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */ |
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#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */ |
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#define ICMP_UNREACH_ADMIN_PROHIBIT 13 /* communication |
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administratively
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prohibited */
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#define ICMP_UNREACH_HOST_PREC 14 /* host precedence |
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violation */
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#define ICMP_UNREACH_PREC_CUTOFF 15 /* precedence cutoff */ |
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#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ |
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#define ICMP_REDIRECT 5 /* shorter route, codes: */ |
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#define ICMP_REDIRECT_NET 0 /* for network */ |
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#define ICMP_REDIRECT_HOST 1 /* for host */ |
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#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ |
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#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ |
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#define ICMP_ALTHOSTADDR 6 /* alternative host address */ |
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#define ICMP_ECHO 8 /* echo service */ |
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#define ICMP_ROUTERADVERT 9 /* router advertisement */ |
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#define ICMP_ROUTERADVERT_NORMAL 0 |
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#define ICMP_ROUTERADVERT_NOROUTE 16 |
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#define ICMP_ROUTERSOLICIT 10 /* router solicitation */ |
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#define ICMP_TIMXCEED 11 /* time exceeded, code: */ |
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#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
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#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
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#define ICMP_PARAMPROB 12 /* ip header bad */ |
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#define ICMP_PARAMPROB_ERRATPTR 0 |
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#define ICMP_PARAMPROB_OPTABSENT 1 |
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#define ICMP_PARAMPROB_LENGTH 2 |
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#define ICMP_TSTAMP 13 /* timestamp request */ |
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#define ICMP_TSTAMPREPLY 14 /* timestamp reply */ |
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#define ICMP_IREQ 15 /* information request */ |
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#define ICMP_IREQREPLY 16 /* information reply */ |
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#define ICMP_MASKREQ 17 /* address mask request */ |
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#define ICMP_MASKREPLY 18 /* address mask reply */ |
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#define ICMP_TRACEROUTE 30 /* traceroute */ |
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#define ICMP_DATACONVERR 31 /* data conversion error */ |
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#define ICMP_MOBILE_REDIRECT 32 /* mobile redirect */ |
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#define ICMP_IPV6_WHEREAREYOU 33 /* ipv6 where are you */ |
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#define ICMP_IPV6_IAMHERE 34 /* ipv6 i am here */ |
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#define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */ |
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#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */ |
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#define ICMP_SKIP 39 /* SKIP */ |
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#define ICMP_PHOTURIS 40 /* security */ |
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#define ICMP_PHOTURIS_UNKNOWN_INDEX 0 /* unknown sec index */ |
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#define ICMP_PHOTURIS_AUTH_FAILED 1 /* auth failed */ |
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#define ICMP_PHOTURIS_DECOMPRESS_FAILED 2 /* decompress failed */ |
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#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */ |
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#define ICMP_PHOTURIS_NEED_AUTHN 4 /* no authentication */ |
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#define ICMP_PHOTURIS_NEED_AUTHZ 5 /* no authorization */ |
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#define ICMP_MAXTYPE 40 |
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#define ICMP_NTYPES (ICMP_MAXTYPE + 1) |
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#ifdef ICMP_STRINGS
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static const char *icmp_type[] = { |
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"echoreply", "unassigned_1", "unassigned_2", "unreach", |
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"sourcequench", "redirect", "althostaddr", "unassigned_7", |
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"echo", "routeradvert", "routersolicit", "timxceed", |
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"paramprob", "tstamp", "tstampreply", "ireq", |
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"ireqreply", "maskreq", "maskreply", "reserved_19", |
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"reserved_20", "reserved_21", "reserved_22", "reserved_23", |
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"reserved_24", "reserved_25", "reserved_26", "reserved_27", |
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"reserved_28", "reserved_29", "traceroute", "dataconverr", |
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"mobile_redirect", "ipv6_whereareyou", "ipv6_iamhere", |
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"mobile_regrequest", "mobile_regreply", "reserved_37", |
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"reserved_38", "skip", "photuris", NULL |
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}; |
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static const char *icmp_code_none[] = { "none", NULL }; |
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static const char *icmp_code_unreach[] = { |
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"net", "host", "oprt", "needfrag", "srcfail", "net_unknown", |
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"host_unknown", "isolated", "net_prohib", "host_prohib", |
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"tosnet", "toshost", "admin_prohibit", "host_prec", "prec_cutoff", NULL |
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}; |
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static const char *icmp_code_redirect[] = { |
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"net", "host", "tosnet", "toshost", NULL |
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}; |
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static const char *icmp_code_routeradvert[] = { |
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"normal", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", |
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"noroute", NULL |
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}; |
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static const char *icmp_code_timxceed[] = { |
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"intrans", "reass", NULL |
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}; |
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static const char *icmp_code_paramprob[] = { |
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"erratptr", "optabsent", "length", NULL |
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}; |
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static const char *icmp_code_photuris[] = { |
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"unknown_index", "auth_failed", "decompress_failed", |
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"decrypt_failed", "need_authn", "need_authz", NULL |
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}; |
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#endif
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#define ICMP_INFOTYPE(type) \
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((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ |
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(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \ |
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(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ |
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(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ |
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(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) |
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#ifdef _KERNEL
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void icmp_error(struct mbuf *, int, int, n_long, int); |
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void icmp_mtudisc(struct icmp *, struct in_addr); |
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void icmp_input(struct mbuf *, ...); |
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void icmp_init(void); |
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void icmp_reflect(struct mbuf *); |
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void icmp_send(struct mbuf *, struct mbuf *); |
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int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t); |
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void icmp_mtudisc_callback_register(void (*)(struct in_addr)); |
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int icmp_ratelimit(const struct in_addr *, const int, const int); |
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#endif
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#endif /* !_NETINET_IP_ICMP_H_ */ |