Annotation of sys/netinet/ip_icmp.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ip_icmp.h,v 1.21 2005/07/31 03:30:55 pascoe Exp $ */
! 2: /* $NetBSD: ip_icmp.h,v 1.10 1996/02/13 23:42:28 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
! 33: */
! 34:
! 35: #ifndef _NETINET_IP_ICMP_H_
! 36: #define _NETINET_IP_ICMP_H_
! 37:
! 38: /*
! 39: * Interface Control Message Protocol Definitions.
! 40: * Per RFC 792, September 1981.
! 41: * RFC 950, August 1985. (Address Mask Request / Reply)
! 42: * RFC 1256, September 1991. (Router Advertisement and Solicitation)
! 43: * RFC 1108, November 1991. (Param Problem, Missing Req. Option)
! 44: * RFC 1393, January 1993. (Traceroute)
! 45: * RFC 1475, June 1993. (Datagram Conversion Error)
! 46: * RFC 1812, June 1995. (adm prohib, host precedence, precedence cutoff)
! 47: * RFC 2002, October 1996. (Mobility changes to Router Advertisement)
! 48: */
! 49:
! 50: /*
! 51: * ICMP Router Advertisement data
! 52: */
! 53: struct icmp_ra_addr {
! 54: n_long ira_addr;
! 55: n_long ira_preference;
! 56: };
! 57:
! 58: /*
! 59: * Structure of an icmp header.
! 60: */
! 61: struct icmp {
! 62: u_int8_t icmp_type; /* type of message, see below */
! 63: u_int8_t icmp_code; /* type sub code */
! 64: u_int16_t icmp_cksum; /* ones complement cksum of struct */
! 65: union {
! 66: u_int8_t ih_pptr; /* ICMP_PARAMPROB */
! 67: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
! 68: struct ih_idseq {
! 69: n_short icd_id;
! 70: n_short icd_seq;
! 71: } ih_idseq;
! 72: int32_t ih_void;
! 73:
! 74: /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
! 75: struct ih_pmtu {
! 76: n_short ipm_void;
! 77: n_short ipm_nextmtu;
! 78: } ih_pmtu;
! 79:
! 80: struct ih_rtradv {
! 81: u_int8_t irt_num_addrs;
! 82: u_int8_t irt_wpa;
! 83: n_short irt_lifetime;
! 84: } ih_rtradv;
! 85: } icmp_hun;
! 86: #define icmp_pptr icmp_hun.ih_pptr
! 87: #define icmp_gwaddr icmp_hun.ih_gwaddr
! 88: #define icmp_id icmp_hun.ih_idseq.icd_id
! 89: #define icmp_seq icmp_hun.ih_idseq.icd_seq
! 90: #define icmp_void icmp_hun.ih_void
! 91: #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
! 92: #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
! 93: #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
! 94: #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
! 95: #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
! 96: union {
! 97: struct id_ts {
! 98: n_time its_otime;
! 99: n_time its_rtime;
! 100: n_time its_ttime;
! 101: } id_ts;
! 102: struct id_ip {
! 103: struct ip idi_ip;
! 104: /* options and then 64 bits of data */
! 105: } id_ip;
! 106: u_int32_t id_mask;
! 107: int8_t id_data[1];
! 108: } icmp_dun;
! 109: #define icmp_otime icmp_dun.id_ts.its_otime
! 110: #define icmp_rtime icmp_dun.id_ts.its_rtime
! 111: #define icmp_ttime icmp_dun.id_ts.its_ttime
! 112: #define icmp_ip icmp_dun.id_ip.idi_ip
! 113: #define icmp_mask icmp_dun.id_mask
! 114: #define icmp_data icmp_dun.id_data
! 115: };
! 116:
! 117: /*
! 118: * For IPv6 transition related ICMP errors.
! 119: */
! 120: #define ICMP_V6ADVLENMIN (8 + sizeof(struct ip) + 40)
! 121: #define ICMP_V6ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 40)
! 122:
! 123: /*
! 124: * Lower bounds on packet lengths for various types.
! 125: * For the error advice packets must first insure that the
! 126: * packet is large enough to contain the returned ip header.
! 127: * Only then can we do the check to see if 64 bits of packet
! 128: * data have been returned, since we need to check the returned
! 129: * ip header length.
! 130: */
! 131: #define ICMP_MINLEN 8 /* abs minimum */
! 132: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
! 133: #define ICMP_MASKLEN 12 /* address mask */
! 134: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
! 135: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
! 136: /* N.B.: must separately check that ip_hl >= 5 */
! 137:
! 138: /*
! 139: * Definition of type and code field values.
! 140: * http://www.iana.org/assignments/icmp-parameters
! 141: */
! 142: #define ICMP_ECHOREPLY 0 /* echo reply */
! 143: #define ICMP_UNREACH 3 /* dest unreachable, codes: */
! 144: #define ICMP_UNREACH_NET 0 /* bad net */
! 145: #define ICMP_UNREACH_HOST 1 /* bad host */
! 146: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
! 147: #define ICMP_UNREACH_PORT 3 /* bad port */
! 148: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
! 149: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
! 150: #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
! 151: #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
! 152: #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
! 153: #define ICMP_UNREACH_NET_PROHIB 9 /* for crypto devs */
! 154: #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
! 155: #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
! 156: #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
! 157: #define ICMP_UNREACH_FILTER_PROHIB 13 /* prohibited access */
! 158: #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* precedence violat'n*/
! 159: #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* precedence cutoff */
! 160: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
! 161: #define ICMP_REDIRECT 5 /* shorter route, codes: */
! 162: #define ICMP_REDIRECT_NET 0 /* for network */
! 163: #define ICMP_REDIRECT_HOST 1 /* for host */
! 164: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
! 165: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
! 166: #define ICMP_ALTHOSTADDR 6 /* alternate host address */
! 167: #define ICMP_ECHO 8 /* echo service */
! 168: #define ICMP_ROUTERADVERT 9 /* router advertisement */
! 169: #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
! 170: #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
! 171: #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
! 172: #define ICMP_TIMXCEED 11 /* time exceeded, code: */
! 173: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
! 174: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
! 175: #define ICMP_PARAMPROB 12 /* ip header bad */
! 176: #define ICMP_PARAMPROB_ERRATPTR 0 /* req. opt. absent */
! 177: #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
! 178: #define ICMP_PARAMPROB_LENGTH 2 /* bad length */
! 179: #define ICMP_TSTAMP 13 /* timestamp request */
! 180: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
! 181: #define ICMP_IREQ 15 /* information request */
! 182: #define ICMP_IREQREPLY 16 /* information reply */
! 183: #define ICMP_MASKREQ 17 /* address mask request */
! 184: #define ICMP_MASKREPLY 18 /* address mask reply */
! 185: #define ICMP_TRACEROUTE 30 /* traceroute */
! 186: #define ICMP_DATACONVERR 31 /* data conversion error */
! 187: #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
! 188: #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
! 189: #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
! 190: #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
! 191: #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
! 192: #define ICMP_SKIP 39 /* SKIP */
! 193: #define ICMP_PHOTURIS 40 /* Photuris */
! 194: #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
! 195: #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
! 196: #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
! 197:
! 198: #define ICMP_MAXTYPE 40
! 199:
! 200: #define ICMP_INFOTYPE(type) \
! 201: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
! 202: (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
! 203: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
! 204: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
! 205: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
! 206:
! 207: #ifdef _KERNEL
! 208: struct mbuf *
! 209: icmp_do_error(struct mbuf *, int, int, n_long, int);
! 210: void icmp_error(struct mbuf *, int, int, n_long, int);
! 211: void icmp_input(struct mbuf *, ...);
! 212: void icmp_init(void);
! 213: void icmp_reflect(struct mbuf *);
! 214: void icmp_send(struct mbuf *, struct mbuf *);
! 215: int icmp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
! 216: struct rtentry *
! 217: icmp_mtudisc_clone(struct sockaddr *);
! 218: void icmp_mtudisc(struct icmp *);
! 219: #endif /* _KERNEL */
! 220: #endif /* _NETINET_IP_ICMP_H_ */
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