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https://github.com/the-tcpdump-group/tcpdump.git
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70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
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* Copyright (C) 2000, Richard Sharpe
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*
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* This software may be distributed either under the terms of the
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* BSD-style license that accompanies tcpdump or under the GNU GPL
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* version 2 or later.
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*
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* print-beep.c
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*
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*/
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/* \summary: Blocks Extensible Exchange Protocol (BEEP) printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include <string.h>
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#include "netdissect.h"
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/* Check for a string but not go beyond length
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* Return TRUE on match, FALSE otherwise
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*
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* Looks at the first few chars up to tl1 ...
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*/
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static int
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l_strnstart(netdissect_options *ndo, const char *tstr1, u_int tl1,
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const char *str2, u_int l2)
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{
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if (!ND_TTEST_LEN(str2, tl1)) {
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/*
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* We don't have tl1 bytes worth of captured data
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* for the string, so we can't check for this
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* string.
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*/
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return 0;
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}
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if (tl1 > l2)
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return 0;
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return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
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}
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void
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beep_print(netdissect_options *ndo, const u_char *bp, u_int length)
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{
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ndo->ndo_protocol = "beep";
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if (l_strnstart(ndo, "MSG", 4, (const char *)bp, length)) /* A REQuest */
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ND_PRINT(" BEEP MSG");
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else if (l_strnstart(ndo, "RPY ", 4, (const char *)bp, length))
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ND_PRINT(" BEEP RPY");
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else if (l_strnstart(ndo, "ERR ", 4, (const char *)bp, length))
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ND_PRINT(" BEEP ERR");
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else if (l_strnstart(ndo, "ANS ", 4, (const char *)bp, length))
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ND_PRINT(" BEEP ANS");
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else if (l_strnstart(ndo, "NUL ", 4, (const char *)bp, length))
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ND_PRINT(" BEEP NUL");
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else if (l_strnstart(ndo, "SEQ ", 4, (const char *)bp, length))
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ND_PRINT(" BEEP SEQ");
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else if (l_strnstart(ndo, "END", 4, (const char *)bp, length))
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ND_PRINT(" BEEP END");
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else
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ND_PRINT(" BEEP (payload or undecoded)");
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}
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