I'm having trouble with some bitwise operations. Primarily ^ and ~. I don't seem to have issues with & and |. I was wondering if someone could help me understand what is going wrong here. Much thanks if you can. I'm attaching the applicable code and the results. I can't understand why when complement is used perl will not return a binary string to me as above with the &. It also doesn't seem to do ^ operations properly too. I'm sure this is my fault but after reading Perl docs and message boards for a bit I can't figure it out. 
The output is below.

icarus# ./test.pl
01001000000111110100111100000000
þÿþþÿþþþþþþÿÿÿÿÿþÿþþÿÿÿÿÿÿÿÿÿÿÿÿ


The small test program is below.

#!/usr/bin/perl

use Validator;

my $suspect = '72.31.79.5';
my $suspect2 = '255.255.255.0';

$obj = Validator->new();

$obj->is_hostaddress($suspect, $suspect2);


The subroutine from the module is below.

sub is_hostaddress {
        my $self = shift if ref($_[0]);
        my $ipaddr = shift;
        my $netmask = shift;

        return unless defined($ipaddr) && defined($netmask);

        my $binipaddr = unpack('B32', pack('C4C4C4C4', split(/\./, $ip
+addr)));
        my $binnetmask = unpack('B32', pack('C4C4C4C4', split(/\./, $n
+etmask)));
        my $result = $binipaddr & $binnetmask;
        my $result2 = $binipaddr | ~ $binnetmask;

        print $result;
        print "\n";
        print $result2;
        print "\n";
}

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In reply to Bitwise Complement by definitemaybe

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