2 * Copyright (C) 2000, Richard Sharpe
4 * This software may be distributed either under the terms of the
5 * BSD-style license that accompanies tcpdump or under the GNU GPL
12 /* \summary: Blocks Extensible Exchange Protocol (BEEP) printer */
18 #include "netdissect-stdinc.h"
22 #include "netdissect.h"
24 /* Check for a string but not go beyond length
25 * Return TRUE on match, FALSE otherwise
27 * Looks at the first few chars up to tl1 ...
31 l_strnstart(netdissect_options *ndo, const char *tstr1, u_int tl1,
32 const char *str2, u_int l2)
34 if (!ND_TTEST_LEN(str2, tl1)) {
36 * We don't have tl1 bytes worth of captured data
37 * for the string, so we can't check for this
45 return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
49 beep_print(netdissect_options *ndo, const u_char *bp, u_int length)
52 ndo->ndo_protocol = "beep";
53 if (l_strnstart(ndo, "MSG", 4, (const char *)bp, length)) /* A REQuest */
54 ND_PRINT(" BEEP MSG");
55 else if (l_strnstart(ndo, "RPY ", 4, (const char *)bp, length))
56 ND_PRINT(" BEEP RPY");
57 else if (l_strnstart(ndo, "ERR ", 4, (const char *)bp, length))
58 ND_PRINT(" BEEP ERR");
59 else if (l_strnstart(ndo, "ANS ", 4, (const char *)bp, length))
60 ND_PRINT(" BEEP ANS");
61 else if (l_strnstart(ndo, "NUL ", 4, (const char *)bp, length))
62 ND_PRINT(" BEEP NUL");
63 else if (l_strnstart(ndo, "SEQ ", 4, (const char *)bp, length))
64 ND_PRINT(" BEEP SEQ");
65 else if (l_strnstart(ndo, "END", 4, (const char *)bp, length))
66 ND_PRINT(" BEEP END");
68 ND_PRINT(" BEEP (payload or undecoded)");