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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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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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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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* ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp |
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*/ |
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|
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#ifndef _NETINET_IP_ICMP_H_ |
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#define _NETINET_IP_ICMP_H_ |
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|
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/* |
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* Interface Control Message Protocol Definitions. |
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* Per RFC 792, September 1981. |
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*/ |
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|
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typedef u_int32_t n_time; |
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|
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/* |
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* Structure of an icmp header. |
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*/ |
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struct icmp { |
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u_char icmp_type; /* type of message, see below */ |
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u_char icmp_code; /* type sub code */ |
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u_short icmp_cksum; /* ones complement cksum of struct */ |
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union { |
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u_char ih_pptr; /* ICMP_PARAMPROB */ |
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struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
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struct ih_idseq { |
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u_short icd_id; |
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u_short icd_seq; |
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} ih_idseq; |
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int ih_void; |
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|
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/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
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struct ih_pmtu { |
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u_short ipm_void; |
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u_short ipm_nextmtu; |
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} ih_pmtu; |
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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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union { |
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struct id_ts { |
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n_time its_otime; |
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n_time its_rtime; |
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n_time its_ttime; |
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} id_ts; |
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struct id_ip { |
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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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uint32_t id_mask; |
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char 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_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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/* |
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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 enought 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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#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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|
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/* |
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* Definition of type and code field values. |
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*/ |
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#define ICMP_ECHOREPLY 0 /* echo reply */ |
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#define ICMP_UNREACH 3 /* dest unreachable, 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 /* prohibited access */ |
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#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */ |
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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_SOURCEQUENCH 4 /* packet lost, slow down */ |
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#define ICMP_REDIRECT 5 /* shorter route, 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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#define ICMP_ECHO 8 /* echo service */ |
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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_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ |
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#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ |
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#define ICMP_PARAMPROB 12 /* ip header bad */ |
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#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */ |
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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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|
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#define ICMP_MAXTYPE 18 |
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|
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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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|
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void icmp_input _P((struct mbuf *, int)); |
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void icmp_error _P((struct mbuf *, u_char, u_char, int, char *)); |
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void icmp_reflect _P((struct mbuf *)); |
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|
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#endif |
