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ip_icmp.h
/* Copyright (C) 1991-2024 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #ifndef __NETINET_IP_ICMP_H #define __NETINET_IP_ICMP_H 1 #include <sys/types.h> #include <stdint.h> __BEGIN_DECLS struct icmphdr { uint8_t type; /* message type */ uint8_t code; /* type sub-code */ uint16_t checksum; union { struct { uint16_t id; uint16_t sequence; } echo; /* echo datagram */ uint32_t gateway; /* gateway address */ struct { uint16_t __glibc_reserved; uint16_t mtu; } frag; /* path mtu discovery */ } un; }; #define ICMP_ECHOREPLY 0 /* Echo Reply */ #define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ #define ICMP_SOURCE_QUENCH 4 /* Source Quench */ #define ICMP_REDIRECT 5 /* Redirect (change route) */ #define ICMP_ECHO 8 /* Echo Request */ #define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ #define ICMP_PARAMETERPROB 12 /* Parameter Problem */ #define ICMP_TIMESTAMP 13 /* Timestamp Request */ #define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ #define ICMP_INFO_REQUEST 15 /* Information Request */ #define ICMP_INFO_REPLY 16 /* Information Reply */ #define ICMP_ADDRESS 17 /* Address Mask Request */ #define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ #define NR_ICMP_TYPES 18 /* Codes for UNREACH. */ #define ICMP_NET_UNREACH 0 /* Network Unreachable */ #define ICMP_HOST_UNREACH 1 /* Host Unreachable */ #define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */ #define ICMP_PORT_UNREACH 3 /* Port Unreachable */ #define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */ #define ICMP_SR_FAILED 5 /* Source Route failed */ #define ICMP_NET_UNKNOWN 6 #define ICMP_HOST_UNKNOWN 7 #define ICMP_HOST_ISOLATED 8 #define ICMP_NET_ANO 9 #define ICMP_HOST_ANO 10 #define ICMP_NET_UNR_TOS 11 #define ICMP_HOST_UNR_TOS 12 #define ICMP_PKT_FILTERED 13 /* Packet filtered */ #define ICMP_PREC_VIOLATION 14 /* Precedence violation */ #define ICMP_PREC_CUTOFF 15 /* Precedence cut off */ #define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */ /* Codes for REDIRECT. */ #define ICMP_REDIR_NET 0 /* Redirect Net */ #define ICMP_REDIR_HOST 1 /* Redirect Host */ #define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */ #define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */ /* Codes for TIME_EXCEEDED. */ #define ICMP_EXC_TTL 0 /* TTL count exceeded */ #define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */ /* Codes for ICMP_EXT_ECHO (PROBE) */ #define ICMP_EXT_ECHO 42 #define ICMP_EXT_ECHOREPLY 43 #define ICMP_EXT_CODE_MAL_QUERY 1 /* Malformed Query */ #define ICMP_EXT_CODE_NO_IF 2 /* No such Interface */ #define ICMP_EXT_CODE_NO_TABLE_ENT 3 /* No table entry */ #define ICMP_EXT_CODE_MULT_IFS 4 /* Multiple Interfaces Satisfy Query */ /* Constants for EXT_ECHO (PROBE) */ #define ICMP_EXT_ECHOREPLY_ACTIVE (1 << 2)/* active bit in reply */ #define ICMP_EXT_ECHOREPLY_IPV4 (1 << 1)/* ipv4 bit in reply */ #define ICMP_EXT_ECHOREPLY_IPV6 1 /* ipv6 bit in reply */ #define ICMP_EXT_ECHO_CTYPE_NAME 1 #define ICMP_EXT_ECHO_CTYPE_INDEX 2 #define ICMP_EXT_ECHO_CTYPE_ADDR 3 #define ICMP_AFI_IP 1 /* Address Family Identifier for IPV4 */ #define ICMP_AFI_IP6 2 /* Address Family Identifier for IPV6 */ #ifdef __USE_MISC /* * 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. * 4. 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 */ #include <netinet/in.h> #include <netinet/ip.h> /* * Internal of an ICMP Router Advertisement */ struct icmp_ra_addr { uint32_t ira_addr; uint32_t ira_preference; }; struct icmp { uint8_t icmp_type; /* type of message, see below */ uint8_t icmp_code; /* type sub code */ uint16_t icmp_cksum; /* ones complement checksum of struct */ union { unsigned char ih_pptr; /* ICMP_PARAMPROB */ struct in_addr ih_gwaddr; /* gateway address */ struct ih_idseq /* echo datagram */ { uint16_t icd_id; uint16_t icd_seq; } ih_idseq; uint32_t ih_void; /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ struct ih_pmtu { uint16_t ipm_void; uint16_t ipm_nextmtu; } ih_pmtu; struct ih_rtradv { uint8_t irt_num_addrs; uint8_t irt_wpa; uint16_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 { uint32_t its_otime; uint32_t its_rtime; uint32_t its_ttime; } id_ts; struct { struct ip idi_ip; /* options and then 64 bits of data */ } id_ip; struct icmp_ra_addr id_radv; uint32_t id_mask; uint8_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_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 (n_time)) /* timestamp */ #define ICMP_MASKLEN 12 /* address mask */ #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ #ifndef _IP_VHL #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) /* N.B.: must separately check that ip_hl >= 5 */ #else #define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8) /* N.B.: must separately check that header length >= 5 */ #endif /* Definition of type and code fields. */ /* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */ #define ICMP_UNREACH 3 /* dest unreachable, codes: */ #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ #define ICMP_ROUTERADVERT 9 /* router advertisement */ #define ICMP_ROUTERSOLICIT 10 /* router solicitation */ #define ICMP_TIMXCEED 11 /* time exceeded, code: */ #define ICMP_PARAMPROB 12 /* ip header bad */ #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_MAXTYPE 18 /* UNREACH 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 /* net denied */ #define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */ #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 */ /* REDIRECT 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 */ /* TIMEXCEED codes */ #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ /* PARAMPROB code */ #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ #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) #endif /* __USE_MISC */ __END_DECLS #endif /* netinet/ip_icmp.h */
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