print-beep.c revision 98524 
1/*
2 * Copyright (C) 2000, Richard Sharpe
3 *
4 * This software may be distributed either under the terms of the
5 * BSD-style licence that accompanies tcpdump or under the GNU GPL
6 * version 2 or later.
7 *
8 * print-beep.c
9 *
10 */
11
12#ifndef lint
13static const char rcsid[] =
14  "@(#) $Header: /tcpdump/master/tcpdump/print-beep.c,v 1.1 2001/12/10 08:21:24 guy Exp $";
15#endif
16
17#ifdef HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <sys/param.h>
22#include <sys/time.h>
23
24#ifdef HAVE_MEMORY_H
25#include <memory.h>
26#endif
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31
32#include "interface.h"
33#include "extract.h"
34
35/* Check for a string but not go beyond length
36 * Return TRUE on match, FALSE otherwise
37 *
38 * Looks at the first few chars up to tl1 ...
39 */
40
41static int l_strnstart(const char *, u_int, const char *, u_int);
42
43static int
44l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2)
45{
46
47	if (tl1 > l2)
48		return 0;
49
50	return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
51}
52
53void
54beep_print(const u_char *bp, u_int length)
55{
56
57	if (l_strnstart("MSG", 4, bp, length)) /* A REQuest */
58		printf(" BEEP MSG");
59	else if (l_strnstart("RPY ", 4, bp, length))
60		printf(" BEEP RPY");
61	else if (l_strnstart("ERR ", 4, bp, length))
62		printf(" BEEP ERR");
63	else if (l_strnstart("ANS ", 4, bp, length))
64		printf(" BEEP ANS");
65	else if (l_strnstart("NUL ", 4, bp, length))
66		printf(" BEEP NUL");
67	else if (l_strnstart("SEQ ", 4, bp, length))
68		printf(" BEEP SEQ");
69	else if (l_strnstart("END", 4, bp, length))
70		printf(" BEEP END");
71	else
72		printf(" BEEP (payload or undecoded)");
73}
74