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- /*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * 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
- * $FreeBSD$
- */
- #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 {
- u_int32_t ira_addr;
- u_int32_t ira_preference;
- };
- /*
- * Structure of an icmp header.
- */
- struct icmphdr {
- u_char icmp_type; /* type of message, see below */
- u_char icmp_code; /* type sub code */
- u_short icmp_cksum; /* ones complement cksum of struct */
- };
- /*
- * Structure of an icmp packet.
- *
- * XXX: should start with a struct icmphdr.
- */
- struct icmp {
- u_char icmp_type; /* type of message, see below */
- u_char icmp_code; /* type sub code */
- u_short icmp_cksum; /* ones complement cksum of struct */
- union {
- u_char ih_pptr; /* ICMP_PARAMPROB */
- struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
- struct ih_idseq {
- uint16_t icd_id; /* network format */
- uint16_t icd_seq; /* network format */
- } ih_idseq;
- int ih_void;
- /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
- struct ih_pmtu {
- uint16_t ipm_void; /* network format */
- uint16_t ipm_nextmtu; /* network format */
- } ih_pmtu;
- struct ih_rtradv {
- u_char irt_num_addrs;
- u_char irt_wpa;
- u_int16_t irt_lifetime;
- } ih_rtradv;
- } icmp_hun;
- #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 {
- struct id_ts { /* ICMP Timestamp */
- /*
- * The next 3 fields are in network format,
- * milliseconds since 00:00 UTC
- */
- uint32_t its_otime; /* Originate */
- uint32_t its_rtime; /* Receive */
- uint32_t its_ttime; /* Transmit */
- } id_ts;
- struct id_ip {
- struct ip idi_ip;
- /* options and then 64 bits of data */
- } id_ip;
- struct icmp_ra_addr id_radv;
- u_int32_t id_mask;
- char 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_radv icmp_dun.id_radv
- #define icmp_mask icmp_dun.id_mask
- #define icmp_data icmp_dun.id_data
- };
- /*
- * 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 (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 */
- /* This is the minimum length required by RFC 792. */
- /*
- * ICMP_ADVLENPREF is the preferred number of bytes which should be contiguous.
- * SCTP needs additional 12 bytes to be able to access the initiate tag
- * in packets containing an INIT chunk. For also supporting SCTP/UDP,
- * additional 8 bytes are needed.
- */
- #define ICMP_ADVLENPREF(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8 + 8 + 12)
- /*
- * 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_FILTER_PROHIB 13 /* admin prohib */
- #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
- #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec 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 /* error at param ptr */
- #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
- void icmp_error(struct mbuf *, int, int, uint32_t, int);
- int icmp_input(struct mbuf **, int *, int);
- int ip_next_mtu(int, int);
- #endif
- #endif
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