1 /*
2 * Copyright (c) 2013 The TCPDUMP project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that: (1) source code
6 * distributions retain the above copyright notice and this paragraph
7 * in its entirety, and (2) distributions including binary code include
8 * the above copyright notice and this paragraph in its entirety in
9 * the documentation or other materials provided with the distribution.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE.
14 *
15 * Original code by Ola Martin Lykkja (ola.lykkja@q-free.com)
16 */
17
18 /* \summary: Communication access for land mobiles (CALM) printer */
19
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include "netdissect-stdinc.h"
25
26 #define ND_LONGJMP_FROM_TCHECK
27 #include "netdissect.h"
28 #include "extract.h"
29 #include "addrtoname.h"
30
31 /*
32 ISO 29281:2009
33 Intelligent Transport Systems . Communications access for land mobiles (CALM)
34 CALM non-IP networking
35 */
36
37 /*
38 * This is the top level routine of the printer. 'bp' points
39 * to the calm header of the packet.
40 */
41 void
calm_fast_print(netdissect_options * ndo,const u_char * bp,u_int length,const struct lladdr_info * src)42 calm_fast_print(netdissect_options *ndo, const u_char *bp, u_int length, const struct lladdr_info *src)
43 {
44 ndo->ndo_protocol = "calm_fast";
45
46 ND_PRINT("CALM FAST");
47 if (src != NULL)
48 ND_PRINT(" src:%s", (src->addr_string)(ndo, src->addr));
49 ND_PRINT("; ");
50
51 if (length < 2) {
52 ND_PRINT(" (length %u < 2)", length);
53 goto invalid;
54 }
55
56 ND_PRINT("SrcNwref:%u; ", GET_U_1(bp));
57 length -= 1;
58 bp += 1;
59
60 ND_PRINT("DstNwref:%u; ", GET_U_1(bp));
61 length -= 1;
62 bp += 1;
63
64 if (ndo->ndo_vflag)
65 ND_DEFAULTPRINT(bp, length);
66 return;
67
68 invalid:
69 nd_print_invalid(ndo);
70 ND_TCHECK_LEN(bp, length);
71 }
72