text: /*
   * Copyright (C) 2000, Richard Sharpe
   *
   * This software may be distributed either under the terms of the
   * BSD-style licence that accompanies tcpdump or under the GNU GPL
   * version 2 or later.
   *
   * print-beep.c
   *
   */
  
  #include <sys/cdefs.h>
  #ifndef lint
  __RCSID("$NetBSD: print-beep.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
  #endif
  
  #define NETDISSECT_REWORKED
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <tcpdump-stdinc.h>
  
  #include <string.h>
  
  #include "interface.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(const char *tstr1, u_int tl1, const char *str2, u_int l2)
  {
  
  	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("MSG", 4, (const char *)bp, length)) /* A REQuest */
  		ND_PRINT((ndo, " BEEP MSG"));
  	else if (l_strnstart("RPY ", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP RPY"));
  	else if (l_strnstart("ERR ", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP ERR"));
  	else if (l_strnstart("ANS ", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP ANS"));
  	else if (l_strnstart("NUL ", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP NUL"));
  	else if (l_strnstart("SEQ ", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP SEQ"));
  	else if (l_strnstart("END", 4, (const char *)bp, length))
  		ND_PRINT((ndo, " BEEP END"));
  	else
  		ND_PRINT((ndo, " BEEP (payload or undecoded)"));
  }
  