1 /* 2 * Copyright (C) 2000, Richard Sharpe 3 * 4 * This software may be distributed either under the terms of the 5 * BSD-style licence that accompanies tcpdump or under the GNU GPL 6 * version 2 or later. 7 * 8 * print-beep.c 9 * 10 */ 11 12 #ifndef lint 13 static const char rcsid[] = 14 "@(#) $Header: /tcpdump/master/tcpdump/print-beep.c,v 1.1.2.1 2002/07/11 07:47:01 guy Exp $"; 15 #endif 16 17 #ifdef HAVE_CONFIG_H 18 #include "config.h" 19 #endif 20 21 #include <sys/param.h> 22 #include <sys/time.h> 23 24 #ifdef HAVE_MEMORY_H 25 #include <memory.h> 26 #endif 27 #include <stdio.h> 28 #include <stdlib.h> 29 #include <string.h> 30 #include <unistd.h> 31 32 #include "interface.h" 33 #include "extract.h" 34 35 /* Check for a string but not go beyond length 36 * Return TRUE on match, FALSE otherwise 37 * 38 * Looks at the first few chars up to tl1 ... 39 */ 40 41 static int l_strnstart(const char *, u_int, const char *, u_int); 42 43 static int 44 l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2) 45 { 46 47 if (tl1 > l2) 48 return 0; 49 50 return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0); 51 } 52 53 void 54 beep_print(const u_char *bp, u_int length) 55 { 56 57 if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */ 58 printf(" BEEP MSG"); 59 else if (l_strnstart("RPY ", 4, (const char *)bp, length)) 60 printf(" BEEP RPY"); 61 else if (l_strnstart("ERR ", 4, (const char *)bp, length)) 62 printf(" BEEP ERR"); 63 else if (l_strnstart("ANS ", 4, (const char *)bp, length)) 64 printf(" BEEP ANS"); 65 else if (l_strnstart("NUL ", 4, (const char *)bp, length)) 66 printf(" BEEP NUL"); 67 else if (l_strnstart("SEQ ", 4, (const char *)bp, length)) 68 printf(" BEEP SEQ"); 69 else if (l_strnstart("END", 4, (const char *)bp, length)) 70 printf(" BEEP END"); 71 else 72 printf(" BEEP (payload or undecoded)"); 73 } 74