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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
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.
16: *
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
27: * SUCH DAMAGE.
28: *
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
31: */
32:
33: #ifndef _NETINET_IP_ICMP_H_
34: #define _NETINET_IP_ICMP_H_
35:
36: /*
37: * Interface Control Message Protocol Definitions.
38: * Per RFC 792, September 1981.
39: */
40:
41: typedef u_int32_t n_time;
42:
43: /*
44: * Structure of an icmp header.
45: */
46: #ifdef PRAGMA_PACK_SUPPORTED
47: #pragma pack(1)
48: #endif
49:
50: struct icmp {
51: u_char icmp_type; /* type of message, see below */
52: u_char icmp_code; /* type sub code */
53: u_short icmp_cksum; /* ones complement cksum of struct */
54: union {
55: u_char ih_pptr; /* ICMP_PARAMPROB */
56: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
57: struct ih_idseq {
58: u_short icd_id;
59: u_short icd_seq;
60: } ih_idseq;
61: int ih_void;
62:
63: /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
64: struct ih_pmtu {
65: u_short ipm_void;
66: u_short ipm_nextmtu;
67: } ih_pmtu;
68: } icmp_hun;
69: #define icmp_pptr icmp_hun.ih_pptr
70: #define icmp_gwaddr icmp_hun.ih_gwaddr
71: #define icmp_id icmp_hun.ih_idseq.icd_id
72: #define icmp_seq icmp_hun.ih_idseq.icd_seq
73: #define icmp_void icmp_hun.ih_void
74: #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
75: #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
76: union {
77: struct id_ts {
78: n_time its_otime;
79: n_time its_rtime;
80: n_time its_ttime;
81: } id_ts;
82: struct id_ip {
83: struct ip idi_ip;
84: /* options and then 64 bits of data */
85: } id_ip;
86: uint32_t id_mask;
87: char id_data[1];
88: } icmp_dun;
89: #define icmp_otime icmp_dun.id_ts.its_otime
90: #define icmp_rtime icmp_dun.id_ts.its_rtime
91: #define icmp_ttime icmp_dun.id_ts.its_ttime
92: #define icmp_ip icmp_dun.id_ip.idi_ip
93: #define icmp_mask icmp_dun.id_mask
94: #define icmp_data icmp_dun.id_data
95: } PACKED__;
96:
97: #ifdef PRAGMA_PACK_SUPPORTED
1.1.1.2 root 98: #pragma pack(PACK_RESET)
1.1 root 99: #endif
100:
101: /*
102: * Lower bounds on packet lengths for various types.
103: * For the error advice packets must first insure that the
104: * packet is large enought to contain the returned ip header.
105: * Only then can we do the check to see if 64 bits of packet
106: * data have been returned, since we need to check the returned
107: * ip header length.
108: */
109: #define ICMP_MINLEN 8 /* abs minimum */
110: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
111: #define ICMP_MASKLEN 12 /* address mask */
112: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
113: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
114: /* N.B.: must separately check that ip_hl >= 5 */
115:
116: /*
117: * Definition of type and code field values.
118: */
119: #define ICMP_ECHOREPLY 0 /* echo reply */
120: #define ICMP_UNREACH 3 /* dest unreachable, codes: */
121: #define ICMP_UNREACH_NET 0 /* bad net */
122: #define ICMP_UNREACH_HOST 1 /* bad host */
123: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
124: #define ICMP_UNREACH_PORT 3 /* bad port */
125: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
126: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
127: #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
128: #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
129: #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
130: #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
131: #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
132: #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
133: #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
134: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
135: #define ICMP_REDIRECT 5 /* shorter route, codes: */
136: #define ICMP_REDIRECT_NET 0 /* for network */
137: #define ICMP_REDIRECT_HOST 1 /* for host */
138: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
139: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
140: #define ICMP_ECHO 8 /* echo service */
141: #define ICMP_ROUTERADVERT 9 /* router advertisement */
142: #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
143: #define ICMP_TIMXCEED 11 /* time exceeded, code: */
144: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
145: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
146: #define ICMP_PARAMPROB 12 /* ip header bad */
147: #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
148: #define ICMP_TSTAMP 13 /* timestamp request */
149: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
150: #define ICMP_IREQ 15 /* information request */
151: #define ICMP_IREQREPLY 16 /* information reply */
152: #define ICMP_MASKREQ 17 /* address mask request */
153: #define ICMP_MASKREPLY 18 /* address mask reply */
154:
155: #define ICMP_MAXTYPE 18
156:
157: #define ICMP_INFOTYPE(type) \
158: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
159: (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
160: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
161: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
162: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
163:
1.1.1.2 root 164: void icmp_input(struct mbuf *, int);
1.1.1.3 ! root 165: void icmp_error(struct mbuf *, u_char, u_char, int, const char *);
1.1.1.2 root 166: void icmp_reflect(struct mbuf *);
1.1 root 167:
168: #endif
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