dist/tcpdump/print-beep.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2000, Richard Sharpe
   5  *
   6  * This software may be distributed either under the terms of the
   7  * BSD-style licence that accompanies tcpdump or under the GNU GPL
   8  * version 2 or later.
   9  *
  10  * print-beep.c
  11  *
  12  */
  13
  14 #include <sys/cdefs.h>
  15 #ifndef lint
  16 #if 0
  17 static const char rcsid[] _U_ =
  18   "@(#) Header: /tcpdump/master/tcpdump/print-beep.c,v 1.6 2003/11/16 09:36:13 guy Exp";
  19 #else
  20 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  21 #endif
  22 #endif
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <tcpdump-stdinc.h>
  29
  30 #ifdef HAVE_MEMORY_H
  31 #include <memory.h>
  32 #endif
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include "interface.h"
  38 #include "extract.h"
  39
  40 /* Check for a string but not go beyond length
  41  * Return TRUE on match, FALSE otherwise
  42  *
  43  * Looks at the first few chars up to tl1 ...
  44  */
  45
  46 static int l_strnstart(const char *, u_int, const char *, u_int);
  47
  48 static int
  49 l_strnstart(const char *tstr1, u_int tl1, const char *str2, u_int l2)
  50 {
  51
  52         if (tl1 > l2)
  53                 return 0;
  54
  55         return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
  56 }
  57
  58 void
  59 beep_print(const u_char *bp, u_int length)
  60 {
  61
  62         if (l_strnstart("MSG", 4, (const char *)bp, length)) /* A REQuest */
  63                 printf(" BEEP MSG");
  64         else if (l_strnstart("RPY ", 4, (const char *)bp, length))
  65                 printf(" BEEP RPY");
  66         else if (l_strnstart("ERR ", 4, (const char *)bp, length))
  67                 printf(" BEEP ERR");
  68         else if (l_strnstart("ANS ", 4, (const char *)bp, length))
  69                 printf(" BEEP ANS");
  70         else if (l_strnstart("NUL ", 4, (const char *)bp, length))
  71                 printf(" BEEP NUL");
  72         else if (l_strnstart("SEQ ", 4, (const char *)bp, length))
  73                 printf(" BEEP SEQ");
  74         else if (l_strnstart("END", 4, (const char *)bp, length))
  75                 printf(" BEEP END");
  76         else
  77                 printf(" BEEP (payload or undecoded)");
  78 }