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/*!\file netinet/ip_icmp.h |
* ICMP definitions. |
*/ |
|
/* |
* 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. All advertising materials mentioning features or use of this software |
* must display the following acknowledgement: |
* This product includes software developed by the University of |
* California, Berkeley and its contributors. |
* 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 |
* $Id: ip_icmp.h,v 1.9 1996/08/20 23:11:30 fenner Exp $ |
*/ |
|
#ifndef __NETINET_IP_ICMP_H |
#define __NETINET_IP_ICMP_H |
|
#include <sys/packon.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 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 { |
n_short icd_id; |
n_short icd_seq; |
} ih_idseq; |
u_int32_t ih_void; /* was 'int' */ |
|
/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
struct ih_pmtu { |
n_short ipm_void; |
n_short ipm_nextmtu; |
} 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 { |
n_time its_otime; |
n_time its_rtime; |
n_time its_ttime; |
} 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_long 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 |
}; |
|
#include <sys/packoff.h> |
|
/* |
* 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 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_ECHO 8 /* echo service */ |
#define ICMP_ROUTERADVERT 9 /* router advertisement */ |
#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_OPTABSENT 1 /* req. opt. absent */ |
#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 */ |
|
#ifndef ICMP_MAXTYPE |
#define ICMP_MAXTYPE 18 |
#endif |
|
#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 |