The Tcpdump Group git mirrors - tcpdump/blob - 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[] =
  14   "@(#) $Header: /tcpdump/master/tcpdump/print-beep.c,v 1.1 2001-12-10 08:21:24 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, bp, length)) /* A REQuest */
  58                 printf(" BEEP MSG");
  59         else if (l_strnstart("RPY ", 4, bp, length))
  60                 printf(" BEEP RPY");
  61         else if (l_strnstart("ERR ", 4, bp, length))
  62                 printf(" BEEP ERR");
  63         else if (l_strnstart("ANS ", 4, bp, length))
  64                 printf(" BEEP ANS");
  65         else if (l_strnstart("NUL ", 4, bp, length))
  66                 printf(" BEEP NUL");
  67         else if (l_strnstart("SEQ ", 4, bp, length))
  68                 printf(" BEEP SEQ");
  69         else if (l_strnstart("END", 4, bp, length))
  70                 printf(" BEEP END");
  71         else
  72                 printf(" BEEP (payload or undecoded)");
  73 }