contrib/tcpdump-3.9/print-beep.c

   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[] _U_ =
  14   "@(#) $Header: /tcpdump/master/tcpdump/print-beep.c,v 1.6 2003/11/16 09:36:13 guy Exp $";
  15 #endif
  16
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <tcpdump-stdinc.h>
  22
  23 #ifdef HAVE_MEMORY_H
  24 #include <memory.h>
  25 #endif
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "interface.h"
  31 #include "extract.h"
  32
  33 /* Check for a string but not go beyond length
  34  * Return TRUE on match, FALSE otherwise
  35  *
  36  * Looks at the first few chars up to tl1 ...
  37  */
  38
  39 static int l_strnstart(const char *, u_int, const char *, u_int);
  40
  41 static int
  42 l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2)
  43 {
  44
  45         if (tl1 > l2)
  46                 return 0;
  47
  48         return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
  49 }
  50
  51 void
  52 beep_print(const u_char *bp, u_int length)
  53 {
  54
  55         if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */
  56                 printf(" BEEP MSG");
  57         else if (l_strnstart("RPY ", 4, (const char *)bp, length))
  58                 printf(" BEEP RPY");
  59         else if (l_strnstart("ERR ", 4, (const char *)bp, length))
  60                 printf(" BEEP ERR");
  61         else if (l_strnstart("ANS ", 4, (const char *)bp, length))
  62                 printf(" BEEP ANS");
  63         else if (l_strnstart("NUL ", 4, (const char *)bp, length))
  64                 printf(" BEEP NUL");
  65         else if (l_strnstart("SEQ ", 4, (const char *)bp, length))
  66                 printf(" BEEP SEQ");
  67         else if (l_strnstart("END", 4, (const char *)bp, length))
  68                 printf(" BEEP END");
  69         else
  70                 printf(" BEEP (payload or undecoded)");
  71 }