1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
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: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 #ifndef lint
23 static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-rt6.c,v 1.26.2.1 2005/04/20 22:35:11 guy Exp $";
25 #endif
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #ifdef INET6
32
33 #include <tcpdump-stdinc.h>
34
35 #include <stdio.h>
36
37 #include "ip6.h"
38
39 #include "interface.h"
40 #include "addrtoname.h"
41 #include "extract.h"
42
43 int
rt6_print(register const u_char * bp,const u_char * bp2 _U_)44 rt6_print(register const u_char *bp, const u_char *bp2 _U_)
45 {
46 register const struct ip6_rthdr *dp;
47 register const struct ip6_rthdr0 *dp0;
48 register const u_char *ep;
49 int i, len;
50 register const struct in6_addr *addr;
51
52 dp = (struct ip6_rthdr *)bp;
53 len = dp->ip6r_len;
54
55 /* 'ep' points to the end of available data. */
56 ep = snapend;
57
58 TCHECK(dp->ip6r_segleft);
59
60 printf("srcrt (len=%d", dp->ip6r_len); /*)*/
61 printf(", type=%d", dp->ip6r_type);
62 printf(", segleft=%d", dp->ip6r_segleft);
63
64 switch (dp->ip6r_type) {
65 #ifndef IPV6_RTHDR_TYPE_0
66 #define IPV6_RTHDR_TYPE_0 0
67 #endif
68 #ifndef IPV6_RTHDR_TYPE_2
69 #define IPV6_RTHDR_TYPE_2 2
70 #endif
71 case IPV6_RTHDR_TYPE_0:
72 case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */
73 dp0 = (struct ip6_rthdr0 *)dp;
74
75 TCHECK(dp0->ip6r0_reserved);
76 if (dp0->ip6r0_reserved || vflag) {
77 printf(", rsv=0x%0x",
78 EXTRACT_32BITS(&dp0->ip6r0_reserved));
79 }
80
81 if (len % 2 == 1)
82 goto trunc;
83 len >>= 1;
84 addr = &dp0->ip6r0_addr[0];
85 for (i = 0; i < len; i++) {
86 if ((u_char *)(addr + 1) > ep)
87 goto trunc;
88
89 printf(", [%d]%s", i, ip6addr_string(addr));
90 addr++;
91 }
92 /*(*/
93 printf(") ");
94 return((dp0->ip6r0_len + 1) << 3);
95 break;
96 default:
97 goto trunc;
98 break;
99 }
100
101 trunc:
102 fputs("[|srcrt]", stdout);
103 return -1;
104 }
105 #endif /* INET6 */
106