2
* Copyright (c) 1982, 1986, 1993
3
* The Regents of the University of California. All rights reserved.
5
* Redistribution and use in source and binary forms, with or without
6
* modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
14
* may be used to endorse or promote products derived from this software
15
* without specific prior written permission.
17
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29
* @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
30
* ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp
33
#ifndef _NETINET_IP_ICMP_H_
34
#define _NETINET_IP_ICMP_H_
37
* Interface Control Message Protocol Definitions.
38
* Per RFC 792, September 1981.
41
typedef uint32_t n_time;
44
* Structure of an icmp header.
47
u_char icmp_type; /* type of message, see below */
48
u_char icmp_code; /* type sub code */
49
u_short icmp_cksum; /* ones complement cksum of struct */
51
u_char ih_pptr; /* ICMP_PARAMPROB */
52
struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
59
/* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
65
#define icmp_pptr icmp_hun.ih_pptr
66
#define icmp_gwaddr icmp_hun.ih_gwaddr
67
#define icmp_id icmp_hun.ih_idseq.icd_id
68
#define icmp_seq icmp_hun.ih_idseq.icd_seq
69
#define icmp_void icmp_hun.ih_void
70
#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
71
#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
80
/* options and then 64 bits of data */
85
#define icmp_otime icmp_dun.id_ts.its_otime
86
#define icmp_rtime icmp_dun.id_ts.its_rtime
87
#define icmp_ttime icmp_dun.id_ts.its_ttime
88
#define icmp_ip icmp_dun.id_ip.idi_ip
89
#define icmp_mask icmp_dun.id_mask
90
#define icmp_data icmp_dun.id_data
94
* Lower bounds on packet lengths for various types.
95
* For the error advice packets must first insure that the
96
* packet is large enought to contain the returned ip header.
97
* Only then can we do the check to see if 64 bits of packet
98
* data have been returned, since we need to check the returned
101
#define ICMP_MINLEN 8 /* abs minimum */
102
#define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
103
#define ICMP_MASKLEN 12 /* address mask */
104
#define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
105
#define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
106
/* N.B.: must separately check that ip_hl >= 5 */
109
* Definition of type and code field values.
111
#define ICMP_ECHOREPLY 0 /* echo reply */
112
#define ICMP_UNREACH 3 /* dest unreachable, codes: */
113
#define ICMP_UNREACH_NET 0 /* bad net */
114
#define ICMP_UNREACH_HOST 1 /* bad host */
115
#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
116
#define ICMP_UNREACH_PORT 3 /* bad port */
117
#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
118
#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
119
#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
120
#define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
121
#define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
122
#define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
123
#define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
124
#define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
125
#define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
126
#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
127
#define ICMP_REDIRECT 5 /* shorter route, codes: */
128
#define ICMP_REDIRECT_NET 0 /* for network */
129
#define ICMP_REDIRECT_HOST 1 /* for host */
130
#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
131
#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
132
#define ICMP_ECHO 8 /* echo service */
133
#define ICMP_ROUTERADVERT 9 /* router advertisement */
134
#define ICMP_ROUTERSOLICIT 10 /* router solicitation */
135
#define ICMP_TIMXCEED 11 /* time exceeded, code: */
136
#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
137
#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
138
#define ICMP_PARAMPROB 12 /* ip header bad */
139
#define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
140
#define ICMP_TSTAMP 13 /* timestamp request */
141
#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
142
#define ICMP_IREQ 15 /* information request */
143
#define ICMP_IREQREPLY 16 /* information reply */
144
#define ICMP_MASKREQ 17 /* address mask request */
145
#define ICMP_MASKREPLY 18 /* address mask reply */
147
#define ICMP_MAXTYPE 18
149
#define ICMP_INFOTYPE(type) \
150
((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
151
(type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
152
(type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
153
(type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
154
(type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
156
void icmp_init(Slirp *slirp);
157
void icmp_input(struct mbuf *, int);
158
void icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize,
159
const char *message);
160
void icmp_reflect(struct mbuf *);
161
void icmp_receive(struct socket *so);
162
void icmp_detach(struct socket *so);