mips_sys

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#! /usr/bin/perl
use strict;
use warnings;
require("crc32.pl");
# parse C data
my @bytes = ();
while (my $line = <>) {
  chomp $line;
  # tcpdump -XX
  if ($line =~ /^ *[0-9A-FXa-fx]+: +([0-9A-Fa-f ]+)/) {
    my $data = $1;
    $data =~ s/  .*$//; # remove ASCII in case the begin was [0-9A-Fa-f]+
    $data =~ s/[^0-9A-Fa-f]//g;
    $data =~ s/(..)/$1,/g;
    for my $part (split(/,/, $data)) {
      if ($part =~ /^([0-9A-Fa-f]{2})/) {
        my $val = $1;
        push (@bytes, hex($val));
      }
    }
  }
  # C data
  elsif ($line =~ /^ *([0-9A-FXa-fx, ]+)/) {
    my $data = $1;
    for my $part (split(/,/, $data)) {
      if ($part =~ /^ *0[xX]([0-9A-Fa-f]{1,2})/) {
        my $val = $1;
        push (@bytes, hex($val));
      }
    }
  }
}
# add CRC
if (@bytes >= 4) {
  my @bytes_no_crc = @bytes;
  my @crc_bytes = ();
  unshift (@crc_bytes, pop(@bytes_no_crc));
  unshift (@crc_bytes, pop(@bytes_no_crc));
  unshift (@crc_bytes, pop(@bytes_no_crc));
  unshift (@crc_bytes, pop(@bytes_no_crc));
  my $crc_calc = crc32([@bytes_no_crc]);
  my $mismatch = 0;
  for (my $i = 0; $i < 4; $i++) {
    if (shift(@crc_bytes) != shift(@{$crc_calc})) {
      $mismatch = 1;
    }
  }
 
 
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