31519b13c8
fields of an ICMP packet. Use this to allow ipfw to pullup only these values since it does not use the rest of the packet and it was failed on ICMP packets because they were not long enough. struct icmp should probably be modified to use these at some point, but that will break a fair bit of code so it can wait for another day. On the off chance that adding this struct breaks something in ports, bump __FreeBSD_version. Reported by: Randy Bush <randy at psg dot com> Tested by: Randy Bush <randy at psg dot com>
211 lines
7.9 KiB
C
211 lines
7.9 KiB
C
/*-
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NETINET_IP_ICMP_H_
|
|
#define _NETINET_IP_ICMP_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 icmphdr {
|
|
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 */
|
|
};
|
|
|
|
/*
|
|
* Structure of an icmp packet.
|
|
*
|
|
* XXX: should start with a struct icmphdr.
|
|
*/
|
|
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;
|
|
int ih_void;
|
|
|
|
/* 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 { /* ICMP Timestamp */
|
|
n_time its_otime; /* Originate */
|
|
n_time its_rtime; /* Receive */
|
|
n_time its_ttime; /* Transmit */
|
|
} 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_int32_t 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
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
|
|
/* N.B.: must separately check that ip_hl >= 5 */
|
|
|
|
/*
|
|
* 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_ALTHOSTADDR 6 /* alternate host address */
|
|
#define ICMP_ECHO 8 /* echo service */
|
|
#define ICMP_ROUTERADVERT 9 /* router advertisement */
|
|
#define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
|
|
#define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
|
|
#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_ERRATPTR 0 /* error at param ptr */
|
|
#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
|
|
#define ICMP_PARAMPROB_LENGTH 2 /* bad length */
|
|
#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_TRACEROUTE 30 /* traceroute */
|
|
#define ICMP_DATACONVERR 31 /* data conversion error */
|
|
#define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
|
|
#define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
|
|
#define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
|
|
#define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
|
|
#define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
|
|
#define ICMP_SKIP 39 /* SKIP */
|
|
#define ICMP_PHOTURIS 40 /* Photuris */
|
|
#define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
|
|
#define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
|
|
#define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
|
|
|
|
#define ICMP_MAXTYPE 40
|
|
|
|
#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)
|
|
|
|
#ifdef _KERNEL
|
|
void icmp_error(struct mbuf *, int, int, n_long, struct ifnet *);
|
|
void icmp_input(struct mbuf *, int);
|
|
int ip_next_mtu(int, int);
|
|
#endif
|
|
|
|
#endif
|