nexmon – Blame information for rev 1

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1 office 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 #define NETDISSECT_REWORKED
23 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26  
27 #ifdef INET6
28  
29 #include <tcpdump-stdinc.h>
30  
31 #include <string.h>
32  
33 #include "ip6.h"
34  
35 #include "interface.h"
36 #include "addrtoname.h"
37 #include "extract.h"
38  
39 int
40 rt6_print(netdissect_options *ndo, register const u_char *bp, const u_char *bp2 _U_)
41 {
42 register const struct ip6_rthdr *dp;
43 register const struct ip6_rthdr0 *dp0;
44 register const u_char *ep;
45 int i, len;
46 register const struct in6_addr *addr;
47 const struct in6_addr *last_addr = NULL;
48  
49 dp = (struct ip6_rthdr *)bp;
50 len = dp->ip6r_len;
51  
52 /* 'ep' points to the end of available data. */
53 ep = ndo->ndo_snapend;
54  
55 ND_TCHECK(dp->ip6r_segleft);
56  
57 ND_PRINT((ndo, "srcrt (len=%d", dp->ip6r_len)); /*)*/
58 ND_PRINT((ndo, ", type=%d", dp->ip6r_type));
59 ND_PRINT((ndo, ", segleft=%d", dp->ip6r_segleft));
60  
61 switch (dp->ip6r_type) {
62 #ifndef IPV6_RTHDR_TYPE_0
63 #define IPV6_RTHDR_TYPE_0 0
64 #endif
65 #ifndef IPV6_RTHDR_TYPE_2
66 #define IPV6_RTHDR_TYPE_2 2
67 #endif
68 case IPV6_RTHDR_TYPE_0:
69 case IPV6_RTHDR_TYPE_2: /* Mobile IPv6 ID-20 */
70 dp0 = (struct ip6_rthdr0 *)dp;
71  
72 ND_TCHECK(dp0->ip6r0_reserved);
73 if (dp0->ip6r0_reserved || ndo->ndo_vflag) {
74 ND_PRINT((ndo, ", rsv=0x%0x",
75 EXTRACT_32BITS(&dp0->ip6r0_reserved)));
76 }
77  
78 if (len % 2 == 1)
79 goto trunc;
80 len >>= 1;
81 addr = &dp0->ip6r0_addr[0];
82 for (i = 0; i < len; i++) {
83 if ((u_char *)(addr + 1) > ep)
84 goto trunc;
85  
86 ND_PRINT((ndo, ", [%d]%s", i, ip6addr_string(ndo, addr)));
87 last_addr = addr;
88 addr++;
89 }
90 /*
91 * the destination address used in the pseudo-header is that of the final
92 * destination : the last address of the routing header
93 */
94 if (last_addr != NULL) {
95 struct ip6_hdr *ip6 = (struct ip6_hdr *)bp2;
96 UNALIGNED_MEMCPY(&ip6->ip6_dst, last_addr, sizeof (struct in6_addr));
97 }
98 /*(*/
99 ND_PRINT((ndo, ") "));
100 return((dp0->ip6r0_len + 1) << 3);
101 break;
102 default:
103 goto trunc;
104 break;
105 }
106  
107 trunc:
108 ND_PRINT((ndo, "[|srcrt]"));
109 return -1;
110 }
111 #endif /* INET6 */