1 /* 2 * Copyright (C) 2000, Richard Sharpe 3 * 4 * This software may be distributed either under the terms of the 5 * BSD-style license that accompanies tcpdump or under the GNU GPL 6 * version 2 or later. 7 * 8 * print-beep.c 9 * 10 */ 11 12 /* \summary: Blocks Extensible Exchange Protocol (BEEP) printer */ 13 14 #ifdef HAVE_CONFIG_H 15 #include "config.h" 16 #endif 17 18 #include <netdissect-stdinc.h> 19 20 #include <string.h> 21 22 #include "netdissect.h" 23 24 /* Check for a string but not go beyond length 25 * Return TRUE on match, FALSE otherwise 26 * 27 * Looks at the first few chars up to tl1 ... 28 */ 29 30 static int 31 l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2) 32 { 33 34 if (tl1 > l2) 35 return 0; 36 37 return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0); 38 } 39 40 void 41 beep_print(netdissect_options *ndo, const u_char *bp, u_int length) 42 { 43 44 if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */ 45 ND_PRINT((ndo, " BEEP MSG")); 46 else if (l_strnstart("RPY ", 4, (const char *)bp, length)) 47 ND_PRINT((ndo, " BEEP RPY")); 48 else if (l_strnstart("ERR ", 4, (const char *)bp, length)) 49 ND_PRINT((ndo, " BEEP ERR")); 50 else if (l_strnstart("ANS ", 4, (const char *)bp, length)) 51 ND_PRINT((ndo, " BEEP ANS")); 52 else if (l_strnstart("NUL ", 4, (const char *)bp, length)) 53 ND_PRINT((ndo, " BEEP NUL")); 54 else if (l_strnstart("SEQ ", 4, (const char *)bp, length)) 55 ND_PRINT((ndo, " BEEP SEQ")); 56 else if (l_strnstart("END", 4, (const char *)bp, length)) 57 ND_PRINT((ndo, " BEEP END")); 58 else 59 ND_PRINT((ndo, " BEEP (payload or undecoded)")); 60 } 61
