ip_icmp.h revision 1.4
1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)ip_icmp.h 7.5 (Berkeley) 6/28/90 34 * $Id: ip_icmp.h,v 1.4 1994/01/08 23:50:44 mycroft Exp $ 35 */ 36 37 #ifndef _NETINET_IP_ICMP_H_ 38 #define _NETINET_IP_ICMP_H_ 39 40 /* 41 * Interface Control Message Protocol Definitions. 42 * Per RFC 792, September 1981. 43 */ 44 45 /* 46 * Structure of an icmp header. 47 */ 48 struct icmp { 49 u_char icmp_type; /* type of message, see below */ 50 u_char icmp_code; /* type sub code */ 51 u_short icmp_cksum; /* ones complement cksum of struct */ 52 union { 53 u_char ih_pptr; /* ICMP_PARAMPROB */ 54 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ 55 struct ih_idseq { 56 n_short icd_id; 57 n_short icd_seq; 58 } ih_idseq; 59 int ih_void; 60 } icmp_hun; 61 #define icmp_pptr icmp_hun.ih_pptr 62 #define icmp_gwaddr icmp_hun.ih_gwaddr 63 #define icmp_id icmp_hun.ih_idseq.icd_id 64 #define icmp_seq icmp_hun.ih_idseq.icd_seq 65 #define icmp_void icmp_hun.ih_void 66 union { 67 struct id_ts { 68 n_time its_otime; 69 n_time its_rtime; 70 n_time its_ttime; 71 } id_ts; 72 struct id_ip { 73 struct ip idi_ip; 74 /* options and then 64 bits of data */ 75 } id_ip; 76 u_long id_mask; 77 char id_data[1]; 78 } icmp_dun; 79 #define icmp_otime icmp_dun.id_ts.its_otime 80 #define icmp_rtime icmp_dun.id_ts.its_rtime 81 #define icmp_ttime icmp_dun.id_ts.its_ttime 82 #define icmp_ip icmp_dun.id_ip.idi_ip 83 #define icmp_mask icmp_dun.id_mask 84 #define icmp_data icmp_dun.id_data 85 }; 86 87 /* 88 * Lower bounds on packet lengths for various types. 89 * For the error advice packets must first insure that the 90 * packet is large enought to contain the returned ip header. 91 * Only then can we do the check to see if 64 bits of packet 92 * data have been returned, since we need to check the returned 93 * ip header length. 94 */ 95 #define ICMP_MINLEN 8 /* abs minimum */ 96 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ 97 #define ICMP_MASKLEN 12 /* address mask */ 98 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ 99 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) 100 /* N.B.: must separately check that ip_hl >= 5 */ 101 102 /* 103 * Definition of type and code field values. 104 */ 105 #define ICMP_ECHOREPLY 0 /* echo reply */ 106 #define ICMP_UNREACH 3 /* dest unreachable, codes: */ 107 #define ICMP_UNREACH_NET 0 /* bad net */ 108 #define ICMP_UNREACH_HOST 1 /* bad host */ 109 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ 110 #define ICMP_UNREACH_PORT 3 /* bad port */ 111 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ 112 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ 113 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ 114 #define ICMP_REDIRECT 5 /* shorter route, codes: */ 115 #define ICMP_REDIRECT_NET 0 /* for network */ 116 #define ICMP_REDIRECT_HOST 1 /* for host */ 117 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ 118 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ 119 #define ICMP_ECHO 8 /* echo service */ 120 #define ICMP_TIMXCEED 11 /* time exceeded, code: */ 121 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ 122 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ 123 #define ICMP_PARAMPROB 12 /* ip header bad */ 124 #define ICMP_TSTAMP 13 /* timestamp request */ 125 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ 126 #define ICMP_IREQ 15 /* information request */ 127 #define ICMP_IREQREPLY 16 /* information reply */ 128 #define ICMP_MASKREQ 17 /* address mask request */ 129 #define ICMP_MASKREPLY 18 /* address mask reply */ 130 131 #define ICMP_MAXTYPE 18 132 133 #define ICMP_INFOTYPE(type) \ 134 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ 135 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ 136 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ 137 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) 138 139 #ifdef KERNEL 140 void icmp_error __P((struct mbuf *, int, int, struct in_addr)); 141 void icmp_input __P((struct mbuf *, int)); 142 void icmp_reflect __P((struct mbuf *)); 143 void icmp_send __P((struct mbuf *, struct mbuf *)); 144 #endif 145 146 #endif /* !_NETINET_IP_ICMP_H_ */ 147
Indexes created Fri Sep 26 20:09:58 GMT 2025