freebsd-nq/contrib/tcpdump/print-beep.c

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/*
* Copyright (C) 2000, Richard Sharpe
*
* This software may be distributed either under the terms of the
* BSD-style licence that accompanies tcpdump or under the GNU GPL
* version 2 or later.
*
* print-beep.c
*
*/
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#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <string.h>
#include "interface.h"
/* Check for a string but not go beyond length
* Return TRUE on match, FALSE otherwise
*
* Looks at the first few chars up to tl1 ...
*/
static int
l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2)
{
if (tl1 > l2)
return 0;
return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
}
void
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beep_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */
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ND_PRINT((ndo, " BEEP MSG"));
else if (l_strnstart("RPY ", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP RPY"));
else if (l_strnstart("ERR ", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP ERR"));
else if (l_strnstart("ANS ", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP ANS"));
else if (l_strnstart("NUL ", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP NUL"));
else if (l_strnstart("SEQ ", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP SEQ"));
else if (l_strnstart("END", 4, (const char *)bp, length))
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ND_PRINT((ndo, " BEEP END"));
else
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ND_PRINT((ndo, " BEEP (payload or undecoded)"));
}