1 /*
2 * Copyright (c) 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-ripng.c,v 1.18 2005-01-04 00:15:54 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 #include <stdio.h>
35
36 #include "route6d.h"
37 #include "interface.h"
38 #include "addrtoname.h"
39 #include "extract.h"
40
41 #if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */
IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr * addr)42 static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr)
43 {
44 static const struct in6_addr in6addr_any; /* :: */
45 return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0);
46 }
47 #endif
48
49 static int
rip6_entry_print(register const struct netinfo6 * ni,int metric)50 rip6_entry_print(register const struct netinfo6 *ni, int metric)
51 {
52 int l;
53 l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
54 if (ni->rip6_tag)
55 l += printf(" [%d]", EXTRACT_16BITS(&ni->rip6_tag));
56 if (metric)
57 l += printf(" (%d)", ni->rip6_metric);
58 return l;
59 }
60
61 void
ripng_print(const u_char * dat,unsigned int length)62 ripng_print(const u_char *dat, unsigned int length)
63 {
64 register const struct rip6 *rp = (struct rip6 *)dat;
65 register const struct netinfo6 *ni;
66 register u_int amt;
67 register u_int i;
68 int j;
69 int trunc;
70
71 if (snapend < dat)
72 return;
73 amt = snapend - dat;
74 i = min(length, amt);
75 if (i < (sizeof(struct rip6) - sizeof(struct netinfo6)))
76 return;
77 i -= (sizeof(struct rip6) - sizeof(struct netinfo6));
78
79 switch (rp->rip6_cmd) {
80
81 case RIP6_REQUEST:
82 j = length / sizeof(*ni);
83 if (j == 1
84 && rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
85 && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
86 printf(" ripng-req dump");
87 break;
88 }
89 if (j * sizeof(*ni) != length - 4)
90 printf(" ripng-req %d[%u]:", j, length);
91 else
92 printf(" ripng-req %d:", j);
93 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
94 for (ni = rp->rip6_nets; i >= sizeof(*ni);
95 i -= sizeof(*ni), ++ni) {
96 if (vflag > 1)
97 printf("\n\t");
98 else
99 printf(" ");
100 rip6_entry_print(ni, 0);
101 }
102 break;
103 case RIP6_RESPONSE:
104 j = length / sizeof(*ni);
105 if (j * sizeof(*ni) != length - 4)
106 printf(" ripng-resp %d[%u]:", j, length);
107 else
108 printf(" ripng-resp %d:", j);
109 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
110 for (ni = rp->rip6_nets; i >= sizeof(*ni);
111 i -= sizeof(*ni), ++ni) {
112 if (vflag > 1)
113 printf("\n\t");
114 else
115 printf(" ");
116 rip6_entry_print(ni, ni->rip6_metric);
117 }
118 if (trunc)
119 printf("[|ripng]");
120 break;
121 default:
122 printf(" ripng-%d ?? %u", rp->rip6_cmd, length);
123 break;
124 }
125 if (rp->rip6_vers != RIP6_VERSION)
126 printf(" [vers %d]", rp->rip6_vers);
127 }
128 #endif /* INET6 */
129