Folks-

I'm just learning all about the many cool OID ioctl's that can be used to communicate with device drivers - OS independently (as I understand). The latest one I came across is OID_PNP_QUERY_POWER, which directs the device driver to: "Tell me what power state you are currently at".

Windows XP identifies that the responses from using OID_PNP_QUERY_POWER should be one of: 

0x0 NdisDeviceStateUnspecified (PM not supported)
0x1 NdisDeviceStateD0              (fully powered)
0x2 NdisDeviceStateD1              (less-than-fully powered)
0x3 NdisDeviceStateD2              (more-less-than-fully powered)
0x4 NdisDeviceStateD3              (really-almost-not-powered-at-all)

[download]
Since I was interested in trying to get this information out of the collection of NIC devices on my laptop (along with other stuff), I hacked up a quick script and made it available below.

My problem is that although the OID_802_3* ioctl's are working, the OMP_PNP_QUERY_POWER one does not.

Any thoughts on what I am doing wrong?

Thanks

-Craig
UPDATE:...thats *PNP* not *PMP (sorry...)
UPDATE: I'm attaching the code here instead of in my scratchpad, by request: 

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_ADD
+RESS()), ":\n";
    print "\tCurrent MAC :", NDIS_Query($fd, OID_802_3_CURRENT_ADDRESS
+()), ":\n";

#print Dumper(\%node);
}

[download]

In reply to OID Power Status Query by cmv

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