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/*
* Copyright (C) 2000, Richard Sharpe
*
* This software may be distributed either under the terms of the
* BSD-style license that accompanies tcpdump or under the GNU GPL
* version 2 or later.
*
* print-beep.c
*
*/
/* \summary: Blocks Extensible Exchange Protocol (BEEP) printer */
#include <config.h>
#include "netdissect-stdinc.h"
#include <string.h>
#include "netdissect.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(netdissect_options *ndo, const char *tstr1, u_int tl1,
const char *str2, u_int l2)
{
if (!ND_TTEST_LEN(str2, tl1)) {
/*
* We don't have tl1 bytes worth of captured data
* for the string, so we can't check for this
* string.
*/
return 0;
}
if (tl1 > l2)
return 0;
return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
}
void
beep_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
ndo->ndo_protocol = "beep";
if (l_strnstart(ndo, "MSG", 4, (const char *)bp, length)) /* A REQuest */
ND_PRINT(" BEEP MSG");
else if (l_strnstart(ndo, "RPY ", 4, (const char *)bp, length))
ND_PRINT(" BEEP RPY");
else if (l_strnstart(ndo, "ERR ", 4, (const char *)bp, length))
ND_PRINT(" BEEP ERR");
else if (l_strnstart(ndo, "ANS ", 4, (const char *)bp, length))
ND_PRINT(" BEEP ANS");
else if (l_strnstart(ndo, "NUL ", 4, (const char *)bp, length))
ND_PRINT(" BEEP NUL");
else if (l_strnstart(ndo, "SEQ ", 4, (const char *)bp, length))
ND_PRINT(" BEEP SEQ");
else if (l_strnstart(ndo, "END", 4, (const char *)bp, length))
ND_PRINT(" BEEP END");
else
ND_PRINT(" BEEP (payload or undecoded)");
}
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