Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-msdp.c
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c8cf0f94
PA
1/*
2 * Copyright (c) 2001 William C. Fenner.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code
7 * distributions retain the above copyright notice and this paragraph
8 * in its entirety, and (2) distributions including binary code include
9 * the above copyright notice and this paragraph in its entirety in
10 * the documentation or other materials provided with the distribution.
11 * The name of William C. Fenner may not be used to endorse or
12 * promote products derived from this software without specific prior
13 * written permission. THIS SOFTWARE IS PROVIDED ``AS IS'' AND
14 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
15 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
16 * FOR A PARTICULAR PURPOSE.
17 */
18#ifndef lint
19static const char rcsid[] _U_ =
20 "@(#) $Header: /tcpdump/master/tcpdump/print-msdp.c,v 1.7 2005/04/06 21:32:41 mcr Exp $";
21#endif
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27#include <tcpdump-stdinc.h>
28
29#include <stdio.h>
30#include <stdlib.h>
31
32#include "interface.h"
33#include "addrtoname.h"
34#include "extract.h"
35
36#define MSDP_TYPE_MAX 7
37
38void
39msdp_print(const unsigned char *sp, u_int length)
40{
41 unsigned int type, len;
42
43 TCHECK2(*sp, 3);
44 /* See if we think we're at the beginning of a compound packet */
45 type = *sp;
46 len = EXTRACT_16BITS(sp + 1);
47 if (len > 1500 || len < 3 || type == 0 || type > MSDP_TYPE_MAX)
48 goto trunc; /* not really truncated, but still not decodable */
49 (void)printf(" msdp:");
50 while (length > 0) {
51 TCHECK2(*sp, 3);
52 type = *sp;
53 len = EXTRACT_16BITS(sp + 1);
54 if (len > 1400 || vflag)
55 printf(" [len %u]", len);
56 if (len < 3)
57 goto trunc;
58 sp += 3;
59 length -= 3;
60 switch (type) {
61 case 1: /* IPv4 Source-Active */
62 case 3: /* IPv4 Source-Active Response */
63 if (type == 1)
64 (void)printf(" SA");
65 else
66 (void)printf(" SA-Response");
67 TCHECK(*sp);
68 (void)printf(" %u entries", *sp);
69 if ((u_int)((*sp * 12) + 8) < len) {
70 (void)printf(" [w/data]");
71 if (vflag > 1) {
72 (void)printf(" ");
73 ip_print(gndo, sp + *sp * 12 + 8 - 3,
74 len - (*sp * 12 + 8));
75 }
76 }
77 break;
78 case 2:
79 (void)printf(" SA-Request");
80 TCHECK2(*sp, 5);
81 (void)printf(" for %s", ipaddr_string(sp + 1));
82 break;
83 case 4:
84 (void)printf(" Keepalive");
85 if (len != 3)
86 (void)printf("[len=%d] ", len);
87 break;
88 case 5:
89 (void)printf(" Notification");
90 break;
91 default:
92 (void)printf(" [type=%d len=%d]", type, len);
93 break;
94 }
95 sp += (len - 3);
96 length -= (len - 3);
97 }
98 return;
99trunc:
100 (void)printf(" [|msdp]");
101}
102
103/*
104 * Local Variables:
105 * c-style: whitesmith
106 * c-basic-offset: 8
107 * End:
108 */