/* * 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 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #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_TTEST2(*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) { if (l_strnstart(ndo, "MSG", 4, (const char *)bp, length)) /* A REQuest */ ND_PRINT((ndo, " BEEP MSG")); else if (l_strnstart(ndo, "RPY ", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP RPY")); else if (l_strnstart(ndo, "ERR ", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP ERR")); else if (l_strnstart(ndo, "ANS ", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP ANS")); else if (l_strnstart(ndo, "NUL ", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP NUL")); else if (l_strnstart(ndo, "SEQ ", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP SEQ")); else if (l_strnstart(ndo, "END", 4, (const char *)bp, length)) ND_PRINT((ndo, " BEEP END")); else ND_PRINT((ndo, " BEEP (payload or undecoded)")); } |