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[] _U_ =
14  "@(#) $Header: /tcpdump/master/tcpdump/print-beep.c,v 1.6 2003/11/16 09:36:13 guy Exp $";
15#endif
16
17#ifdef HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <tcpdump-stdinc.h>
22
23#ifdef HAVE_MEMORY_H
24#include <memory.h>
25#endif
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29
30#include "interface.h"
31#include "extract.h"
32
33/* Check for a string but not go beyond length
34 * Return TRUE on match, FALSE otherwise
35 *
36 * Looks at the first few chars up to tl1 ...
37 */
38
39static int l_strnstart(const char *, u_int, const char *, u_int);
40
41static int
42l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2)
43{
44
45	if (tl1 > l2)
46		return 0;
47
48	return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
49}
50
51void
52beep_print(const u_char *bp, u_int length)
53{
54
55	if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */
56		printf(" BEEP MSG");
57	else if (l_strnstart("RPY ", 4, (const char *)bp, length))
58		printf(" BEEP RPY");
59	else if (l_strnstart("ERR ", 4, (const char *)bp, length))
60		printf(" BEEP ERR");
61	else if (l_strnstart("ANS ", 4, (const char *)bp, length))
62		printf(" BEEP ANS");
63	else if (l_strnstart("NUL ", 4, (const char *)bp, length))
64		printf(" BEEP NUL");
65	else if (l_strnstart("SEQ ", 4, (const char *)bp, length))
66		printf(" BEEP SEQ");
67	else if (l_strnstart("END", 4, (const char *)bp, length))
68		printf(" BEEP END");
69	else
70		printf(" BEEP (payload or undecoded)");
71}
72