source: rtems/cpukit/libnetworking/netinet/ip_icmp.h @ 39e6e65a

4.104.114.84.95
Last change on this file since 39e6e65a was 39e6e65a, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 19, 1998 at 9:32:28 PM

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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. 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 *
33 *      @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
34 * $Id$
35 */
36
37#ifndef _NETINET_IP_ICMP_H_
38#define _NETINET_IP_ICMP_H_
39
40/*
41 * Interface Control Message Protocol Definitions.
42 * Per RFC 792, September 1981.
43 */
44
45/*
46 * Internal of an ICMP Router Advertisement
47 */
48struct icmp_ra_addr {
49        u_int32_t ira_addr;
50        u_int32_t ira_preference;
51};
52
53/*
54 * Structure of an icmp header.
55 */
56struct icmp {
57        u_char  icmp_type;              /* type of message, see below */
58        u_char  icmp_code;              /* type sub code */
59        u_short icmp_cksum;             /* ones complement cksum of struct */
60        union {
61                u_char ih_pptr;                 /* ICMP_PARAMPROB */
62                struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
63                struct ih_idseq {
64                        n_short icd_id;
65                        n_short icd_seq;
66                } ih_idseq;
67                int ih_void;
68
69                /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
70                struct ih_pmtu {
71                        n_short ipm_void;
72                        n_short ipm_nextmtu;
73                } ih_pmtu;
74
75                struct ih_rtradv {
76                        u_char irt_num_addrs;
77                        u_char irt_wpa;
78                        u_int16_t irt_lifetime;
79                } ih_rtradv;
80        } icmp_hun;
81#define icmp_pptr       icmp_hun.ih_pptr
82#define icmp_gwaddr     icmp_hun.ih_gwaddr
83#define icmp_id         icmp_hun.ih_idseq.icd_id
84#define icmp_seq        icmp_hun.ih_idseq.icd_seq
85#define icmp_void       icmp_hun.ih_void
86#define icmp_pmvoid     icmp_hun.ih_pmtu.ipm_void
87#define icmp_nextmtu    icmp_hun.ih_pmtu.ipm_nextmtu
88#define icmp_num_addrs  icmp_hun.ih_rtradv.irt_num_addrs
89#define icmp_wpa        icmp_hun.ih_rtradv.irt_wpa
90#define icmp_lifetime   icmp_hun.ih_rtradv.irt_lifetime
91        union {
92                struct id_ts {
93                        n_time its_otime;
94                        n_time its_rtime;
95                        n_time its_ttime;
96                } id_ts;
97                struct id_ip  {
98                        struct ip idi_ip;
99                        /* options and then 64 bits of data */
100                } id_ip;
101                struct icmp_ra_addr id_radv;
102                u_long  id_mask;
103                char    id_data[1];
104        } icmp_dun;
105#define icmp_otime      icmp_dun.id_ts.its_otime
106#define icmp_rtime      icmp_dun.id_ts.its_rtime
107#define icmp_ttime      icmp_dun.id_ts.its_ttime
108#define icmp_ip         icmp_dun.id_ip.idi_ip
109#define icmp_radv       icmp_dun.id_radv
110#define icmp_mask       icmp_dun.id_mask
111#define icmp_data       icmp_dun.id_data
112};
113
114/*
115 * Lower bounds on packet lengths for various types.
116 * For the error advice packets must first insure that the
117 * packet is large enough to contain the returned ip header.
118 * Only then can we do the check to see if 64 bits of packet
119 * data have been returned, since we need to check the returned
120 * ip header length.
121 */
122#define ICMP_MINLEN     8                               /* abs minimum */
123#define ICMP_TSLEN      (8 + 3 * sizeof (n_time))       /* timestamp */
124#define ICMP_MASKLEN    12                              /* address mask */
125#define ICMP_ADVLENMIN  (8 + sizeof (struct ip) + 8)    /* min */
126#ifndef _IP_VHL
127#define ICMP_ADVLEN(p)  (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
128        /* N.B.: must separately check that ip_hl >= 5 */
129#else
130#define ICMP_ADVLEN(p)  (8 + (IP_VHL_HL((p)->icmp_ip.ip_vhl) << 2) + 8)
131        /* N.B.: must separately check that header length >= 5 */
132#endif
133
134/*
135 * Definition of type and code field values.
136 */
137#define ICMP_ECHOREPLY          0               /* echo reply */
138#define ICMP_UNREACH            3               /* dest unreachable, codes: */
139#define         ICMP_UNREACH_NET        0               /* bad net */
140#define         ICMP_UNREACH_HOST       1               /* bad host */
141#define         ICMP_UNREACH_PROTOCOL   2               /* bad protocol */
142#define         ICMP_UNREACH_PORT       3               /* bad port */
143#define         ICMP_UNREACH_NEEDFRAG   4               /* IP_DF caused drop */
144#define         ICMP_UNREACH_SRCFAIL    5               /* src route failed */
145#define         ICMP_UNREACH_NET_UNKNOWN 6              /* unknown net */
146#define         ICMP_UNREACH_HOST_UNKNOWN 7             /* unknown host */
147#define         ICMP_UNREACH_ISOLATED   8               /* src host isolated */
148#define         ICMP_UNREACH_NET_PROHIB 9               /* prohibited access */
149#define         ICMP_UNREACH_HOST_PROHIB 10             /* ditto */
150#define         ICMP_UNREACH_TOSNET     11              /* bad tos for net */
151#define         ICMP_UNREACH_TOSHOST    12              /* bad tos for host */
152#define         ICMP_UNREACH_FILTER_PROHIB 13           /* admin prohib */
153#define         ICMP_UNREACH_HOST_PRECEDENCE 14         /* host prec vio. */
154#define         ICMP_UNREACH_PRECEDENCE_CUTOFF 15       /* prec cutoff */
155#define ICMP_SOURCEQUENCH       4               /* packet lost, slow down */
156#define ICMP_REDIRECT           5               /* shorter route, codes: */
157#define         ICMP_REDIRECT_NET       0               /* for network */
158#define         ICMP_REDIRECT_HOST      1               /* for host */
159#define         ICMP_REDIRECT_TOSNET    2               /* for tos and net */
160#define         ICMP_REDIRECT_TOSHOST   3               /* for tos and host */
161#define ICMP_ECHO               8               /* echo service */
162#define ICMP_ROUTERADVERT       9               /* router advertisement */
163#define ICMP_ROUTERSOLICIT      10              /* router solicitation */
164#define ICMP_TIMXCEED           11              /* time exceeded, code: */
165#define         ICMP_TIMXCEED_INTRANS   0               /* ttl==0 in transit */
166#define         ICMP_TIMXCEED_REASS     1               /* ttl==0 in reass */
167#define ICMP_PARAMPROB          12              /* ip header bad */
168#define         ICMP_PARAMPROB_OPTABSENT 1              /* req. opt. absent */
169#define ICMP_TSTAMP             13              /* timestamp request */
170#define ICMP_TSTAMPREPLY        14              /* timestamp reply */
171#define ICMP_IREQ               15              /* information request */
172#define ICMP_IREQREPLY          16              /* information reply */
173#define ICMP_MASKREQ            17              /* address mask request */
174#define ICMP_MASKREPLY          18              /* address mask reply */
175
176#define ICMP_MAXTYPE            18
177
178#define ICMP_INFOTYPE(type) \
179        ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
180        (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
181        (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
182        (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
183        (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
184
185#ifdef KERNEL
186void    icmp_error __P((struct mbuf *, int, int, n_long, struct ifnet *));
187void    icmp_input __P((struct mbuf *, int));
188#endif
189
190#endif
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