use strict;

use Win32API::File qw(CreateFile DeviceIoControl :FILE_SHARE_ :Misc);
use Data::Dumper;

sub IOCTL_NDIS_QUERY_GLOBAL_STATS () { 0x17 << 16 | 2 };
sub OID_802_3_PERMANENT_ADDRESS   () { 0x01010101 };
sub OID_802_3_CURRENT_ADDRESS     () { 0x01010102 };
sub OID_PNP_SET_POWER             () { 0xFD010101 };
sub OID_PNP_QUERY_POWER           () { 0xFD010102 };


# This routine graciously provided by PerlMonk almut
# http://www.perlmonks.org/?node_id=580097
# http://www.perlmonks.org/?node_id=639099
sub NDIS_Query
{
    my ($handle, $oid) = @_;

    my $nBytes = 0;
    my $buf = "\0"x10;
    my $oidp = pack("L", $oid);

    DeviceIoControl($handle,
        IOCTL_NDIS_QUERY_GLOBAL_STATS(),
        $oidp, length($oidp),
        $buf, length($buf),
        $nBytes,
        [] );

    if($nBytes > 0) {
        #return join "-", unpack("(a2)*", unpack("H*", $buf) );
        return(unpack("b*", $buf));
    }
    return();
}

# Get nic info via wmic (not available on all versions of windows)...
my @devs = split(/^\s*\cM\n/m, `wmic nicconfig list /format:value`);
shift(@devs);                    # Remove initial blank line

# Iterate through each device...
foreach my $d (@devs) {
    $d =~ s/\cM//g;                       # Grrrr, rotten windows
    my %node = split(/[=\n]/, $d);        # Hashify information


    print "\n$node{Description} ($node{ServiceName}) \n";
    # Make device to do the ioctl on...
    my $fname = '//./' . $node{SettingID};
    #my $fname = '//Device/NPF_' . $node{SettingID};
    my $fd = CreateFile($fname,
        0, FILE_SHARE_READ(), [], OPEN_EXISTING(), 0, []);
    print "\t$fname ";
    if(!$fd) { print "$!\n"; next; } else { print "\n" };

    # print info...
    print "\tCurrent Power :", NDIS_Query($fd, OID_PNP_QUERY_POWER()), ":\n";
    print "\tPermanent MAC :", NDIS_Query($fd, OID_802_3_PERMANENT_ADDRESS()), ":\n";
    print "\tCurrent MAC :", NDIS_Query($fd, OID_802_3_CURRENT_ADDRESS()), ":\n";

#print Dumper(\%node);
}