/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef __NETINET_IP_ICMP_H
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#define __NETINET_IP_ICMP_H 1
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#include <sys/types.h>
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#include <stdint.h>
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__BEGIN_DECLS
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struct icmphdr
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{
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uint8_t type; /* message type */
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uint8_t code; /* type sub-code */
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uint16_t checksum;
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union
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{
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struct
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{
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uint16_t id;
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uint16_t sequence;
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} echo; /* echo datagram */
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uint32_t gateway; /* gateway address */
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struct
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{
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uint16_t __glibc_reserved;
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uint16_t mtu;
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} frag; /* path mtu discovery */
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} un;
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};
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#define ICMP_ECHOREPLY 0 /* Echo Reply */
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#define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
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#define ICMP_SOURCE_QUENCH 4 /* Source Quench */
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#define ICMP_REDIRECT 5 /* Redirect (change route) */
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#define ICMP_ECHO 8 /* Echo Request */
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#define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
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#define ICMP_PARAMETERPROB 12 /* Parameter Problem */
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#define ICMP_TIMESTAMP 13 /* Timestamp Request */
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#define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
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#define ICMP_INFO_REQUEST 15 /* Information Request */
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#define ICMP_INFO_REPLY 16 /* Information Reply */
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#define ICMP_ADDRESS 17 /* Address Mask Request */
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#define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
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#define NR_ICMP_TYPES 18
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/* Codes for UNREACH. */
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#define ICMP_NET_UNREACH 0 /* Network Unreachable */
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#define ICMP_HOST_UNREACH 1 /* Host Unreachable */
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#define ICMP_PROT_UNREACH 2 /* Protocol Unreachable */
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#define ICMP_PORT_UNREACH 3 /* Port Unreachable */
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#define ICMP_FRAG_NEEDED 4 /* Fragmentation Needed/DF set */
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#define ICMP_SR_FAILED 5 /* Source Route failed */
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#define ICMP_NET_UNKNOWN 6
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#define ICMP_HOST_UNKNOWN 7
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#define ICMP_HOST_ISOLATED 8
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#define ICMP_NET_ANO 9
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#define ICMP_HOST_ANO 10
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#define ICMP_NET_UNR_TOS 11
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#define ICMP_HOST_UNR_TOS 12
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#define ICMP_PKT_FILTERED 13 /* Packet filtered */
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#define ICMP_PREC_VIOLATION 14 /* Precedence violation */
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#define ICMP_PREC_CUTOFF 15 /* Precedence cut off */
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#define NR_ICMP_UNREACH 15 /* instead of hardcoding immediate value */
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/* Codes for REDIRECT. */
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#define ICMP_REDIR_NET 0 /* Redirect Net */
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#define ICMP_REDIR_HOST 1 /* Redirect Host */
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#define ICMP_REDIR_NETTOS 2 /* Redirect Net for TOS */
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#define ICMP_REDIR_HOSTTOS 3 /* Redirect Host for TOS */
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/* Codes for TIME_EXCEEDED. */
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#define ICMP_EXC_TTL 0 /* TTL count exceeded */
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#define ICMP_EXC_FRAGTIME 1 /* Fragment Reass time exceeded */
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#ifdef __USE_MISC
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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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* 4. 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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#include <netinet/in.h>
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#include <netinet/ip.h>
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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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{
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uint32_t ira_addr;
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uint32_t ira_preference;
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};
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struct icmp
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{
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uint8_t icmp_type; /* type of message, see below */
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uint8_t icmp_code; /* type sub code */
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uint16_t icmp_cksum; /* ones complement checksum of struct */
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union
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{
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unsigned char ih_pptr; /* ICMP_PARAMPROB */
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struct in_addr ih_gwaddr; /* gateway address */
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struct ih_idseq /* echo datagram */
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{
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uint16_t icd_id;
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uint16_t icd_seq;
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} ih_idseq;
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uint32_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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{
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uint16_t ipm_void;
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uint16_t ipm_nextmtu;
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} ih_pmtu;
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struct ih_rtradv
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{
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uint8_t irt_num_addrs;
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uint8_t irt_wpa;
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uint16_t irt_lifetime;
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} ih_rtradv;
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} icmp_hun;
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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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{
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struct
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{
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uint32_t its_otime;
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uint32_t its_rtime;
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uint32_t its_ttime;
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} id_ts;
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struct
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{
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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;
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struct icmp_ra_addr id_radv;
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uint32_t id_mask;
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uint8_t id_data[1];
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} icmp_dun;
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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_radv
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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 enough 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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#ifndef _IP_VHL
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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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#else
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#define ICMP_ADVLEN(p) (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
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/* N.B.: must separately check that header length >= 5 */
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#endif
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/* Definition of type and code fields. */
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/* defined above: ICMP_ECHOREPLY, ICMP_REDIRECT, ICMP_ECHO */
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#define ICMP_UNREACH 3 /* dest unreachable, codes: */
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#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
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#define ICMP_ROUTERADVERT 9 /* router advertisement */
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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_PARAMPROB 12 /* ip header bad */
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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_MAXTYPE 18
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/* UNREACH 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 /* net denied */
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#define ICMP_UNREACH_HOST_PROHIB 10 /* host denied */
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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_FILTER_PROHIB 13 /* admin prohib */
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#define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
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#define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
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/* REDIRECT 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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/* TIMEXCEED codes */
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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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/* PARAMPROB code */
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#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
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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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#endif /* __USE_MISC */
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__END_DECLS
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#endif /* netinet/ip_icmp.h */
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