nexmon – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
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 "ip6.h"
32 #include "interface.h"
33 #include "extract.h"
34  
35 int
36 frag6_print(netdissect_options *ndo, register const u_char *bp, register const u_char *bp2)
37 {
38 register const struct ip6_frag *dp;
39 register const struct ip6_hdr *ip6;
40  
41 dp = (const struct ip6_frag *)bp;
42 ip6 = (const struct ip6_hdr *)bp2;
43  
44 ND_TCHECK(dp->ip6f_offlg);
45  
46 if (ndo->ndo_vflag) {
47 ND_PRINT((ndo, "frag (0x%08x:%d|%ld)",
48 EXTRACT_32BITS(&dp->ip6f_ident),
49 EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK,
50 sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) -
51 (long)(bp - bp2) - sizeof(struct ip6_frag)));
52 } else {
53 ND_PRINT((ndo, "frag (%d|%ld)",
54 EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK,
55 sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) -
56 (long)(bp - bp2) - sizeof(struct ip6_frag)));
57 }
58  
59 /* it is meaningless to decode non-first fragment */
60 if ((EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK) != 0)
61 return -1;
62 else
63 {
64 ND_PRINT((ndo, " "));
65 return sizeof(struct ip6_frag);
66 }
67 trunc:
68 ND_PRINT((ndo, "[|frag]"));
69 return -1;
70 }
71 #endif /* INET6 */