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