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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * 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. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)ip_icmp.h 7.5 (Berkeley) 6/28/90
! 34: * ip_icmp.h,v 1.3 1993/05/20 03:50:22 cgd Exp
1.1 root 35: */
36:
1.1.1.2 ! root 37: #ifndef _NETINET_IP_ICMP_H_
! 38: #define _NETINET_IP_ICMP_H_
! 39:
1.1 root 40: /*
41: * Interface Control Message Protocol Definitions.
42: * Per RFC 792, September 1981.
43: */
44:
45: /*
46: * Structure of an icmp header.
47: */
48: struct icmp {
49: u_char icmp_type; /* type of message, see below */
50: u_char icmp_code; /* type sub code */
51: u_short icmp_cksum; /* ones complement cksum of struct */
52: union {
53: u_char ih_pptr; /* ICMP_PARAMPROB */
54: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
55: struct ih_idseq {
56: n_short icd_id;
57: n_short icd_seq;
58: } ih_idseq;
59: int ih_void;
60: } icmp_hun;
61: #define icmp_pptr icmp_hun.ih_pptr
62: #define icmp_gwaddr icmp_hun.ih_gwaddr
63: #define icmp_id icmp_hun.ih_idseq.icd_id
64: #define icmp_seq icmp_hun.ih_idseq.icd_seq
65: #define icmp_void icmp_hun.ih_void
66: union {
67: struct id_ts {
68: n_time its_otime;
69: n_time its_rtime;
70: n_time its_ttime;
71: } id_ts;
72: struct id_ip {
73: struct ip idi_ip;
74: /* options and then 64 bits of data */
75: } id_ip;
76: u_long id_mask;
77: char id_data[1];
78: } icmp_dun;
79: #define icmp_otime icmp_dun.id_ts.its_otime
80: #define icmp_rtime icmp_dun.id_ts.its_rtime
81: #define icmp_ttime icmp_dun.id_ts.its_ttime
82: #define icmp_ip icmp_dun.id_ip.idi_ip
83: #define icmp_mask icmp_dun.id_mask
84: #define icmp_data icmp_dun.id_data
85: };
86:
87: /*
88: * Lower bounds on packet lengths for various types.
89: * For the error advice packets must first insure that the
90: * packet is large enought to contain the returned ip header.
91: * Only then can we do the check to see if 64 bits of packet
92: * data have been returned, since we need to check the returned
93: * ip header length.
94: */
95: #define ICMP_MINLEN 8 /* abs minimum */
96: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
97: #define ICMP_MASKLEN 12 /* address mask */
98: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
99: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
100: /* N.B.: must separately check that ip_hl >= 5 */
101:
102: /*
103: * Definition of type and code field values.
104: */
105: #define ICMP_ECHOREPLY 0 /* echo reply */
106: #define ICMP_UNREACH 3 /* dest unreachable, codes: */
107: #define ICMP_UNREACH_NET 0 /* bad net */
108: #define ICMP_UNREACH_HOST 1 /* bad host */
109: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
110: #define ICMP_UNREACH_PORT 3 /* bad port */
111: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
112: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
113: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
114: #define ICMP_REDIRECT 5 /* shorter route, codes: */
115: #define ICMP_REDIRECT_NET 0 /* for network */
116: #define ICMP_REDIRECT_HOST 1 /* for host */
117: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
118: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
119: #define ICMP_ECHO 8 /* echo service */
120: #define ICMP_TIMXCEED 11 /* time exceeded, code: */
121: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
122: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
123: #define ICMP_PARAMPROB 12 /* ip header bad */
124: #define ICMP_TSTAMP 13 /* timestamp request */
125: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
126: #define ICMP_IREQ 15 /* information request */
127: #define ICMP_IREQREPLY 16 /* information reply */
128: #define ICMP_MASKREQ 17 /* address mask request */
129: #define ICMP_MASKREPLY 18 /* address mask reply */
130:
131: #define ICMP_MAXTYPE 18
132:
133: #define ICMP_INFOTYPE(type) \
134: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
135: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
136: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
137: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
1.1.1.2 ! root 138:
! 139: #endif /* !_NETINET_IP_ICMP_H_ */
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