mdw@git.distorted.org.uk Git - unet/blob - tests/bidi

   1 #! /bin/perl
   2
   3 open LEFT, "+</dev/unet0" or die "open /dev/unet0: $!";
   4 open RIGHT, "+</dev/unet1" or die "open /dev/unet1: $!";
   5
   6 $rd = 0;
   7 vec($rd, fileno(LEFT), 1) = 1;
   8 vec($rd, fileno(RIGHT), 1) = 1;
   9
  10 for (;;) {
  11   select($ord = $rd, undef, undef, undef);
  12   if (vec($ord, fileno(LEFT), 1)) {
  13     defined sysread(LEFT, $buf, 65536) or die "read(/dev/unet0): $!";
  14     print "read packet from unet0\n";
  15     hexdump($buf);
  16     syswrite(RIGHT, $buf, length($buf));
  17   }
  18   if (vec($ord, fileno(RIGHT), 1)) {
  19     defined sysread(RIGHT, $buf, 65536) or die "read(/dev/unet1): $!";
  20     print "read packet from unet1\n";
  21     hexdump($buf);
  22     syswrite(LEFT, $buf, length($buf));
  23   }
  24 }
  25
  26 sub hexdump {
  27   my $buf = shift;
  28   my ($off, $i);
  29
  30   while ($off < length($buf)) {
  31     printf "%08x : ", $off;
  32     for ($i = $off; $i < $off + 16; $i++) {
  33       if ($i >= length($buf)) {
  34         print "** ";
  35       } else {
  36         printf "%02x ", ord(substr($buf, $i, 1));
  37       }
  38     }
  39     print ": ";
  40     for ($i = $off; $i < $off + 16; $i++) {
  41       if ($i >= length($buf)) {
  42         print "*";
  43       } else {
  44         $ch = substr($buf, $i, 1);
  45         $code = ord($ch);
  46         if ($code < 32 || $code > 126) {
  47           print ".";
  48         } else {
  49           print $ch;
  50         }
  51       }
  52     }
  53     print "\n";
  54     $off += 16;
  55   }
  56   print "\n";
  57 }