if you *really* want to list the network interfaces of your machine, here is a (not so) small script that exploits some system APIs to emulate ifconfig -a on a Win32 machine. should work for Windoze versions 98 and later or NT SP4 and later (2000/XP/...).
it's all fair to me except that the operational status seems to always report UNREACHABLE. go figure...
#!perl -w
#### if_info.pl
#### ----------
#### a quasi-replacement for Unix's 'ifconfig -a' under Win32
####
#### written by Aldo Calpini <dada@perl.it> on a sunny 2002.05.16
use strict;
use Win32::API 0.20;
use vars qw(
$size $unpack
$if_table $ifs @if_data
$ip_table $ips @ip_data
);
my $VERSION = "0.01";
my $GetIfTable = new Win32::API(
'IpHlpAPI', 'GetIfTable', 'PPI', 'N'
) or die $^E;
my $GetIpAddrTable = new Win32::API(
'IpHlpAPI', 'GetIpAddrTable', 'PPI', 'N'
) or die $^E;
#### from the MSDN library
my @MIB_IFROW = (
[ wszName => 'a512' ],
[ dwIndex => 'L' ],
[ dwType => 'L' ],
[ dwMtu => 'L' ],
[ dwSpeed => 'L' ],
[ dwPhysAddrLen => 'L' ],
[ bPhysAddr => 'a8' ],
[ dwAdminStatus => 'L' ],
[ dwOperStatus => 'L' ],
[ dwLastChange => 'L' ],
[ dwInOctets => 'L' ],
[ dwInUcastPkts => 'L' ],
[ dwInNUcastPkts => 'L' ],
[ dwInDiscards => 'L' ],
[ dwInErrors => 'L' ],
[ dwInUnknownProtos => 'L' ],
[ dwOutOctets => 'L' ],
[ dwOutUcastPkts => 'L' ],
[ dwOutNUcastPkts => 'L' ],
[ dwOutDiscards => 'L' ],
[ dwOutErrors => 'L' ],
[ dwOutQLen => 'L' ],
[ dwDescrLen => 'L' ],
[ bDescr => 'a256' ],
);
my @MIB_IPADDRROW = (
[ dwAddr => 'L' ],
[ dwIndex => 'L' ],
[ dwMask => 'L' ],
[ dwBCastAddr => 'L' ],
[ dwReasmSize => 'L' ],
[ unused1 => 'S' ],
[ unused2 => 'S' ],
);
#### first call to get number of bytes needed
$size = pack("L", 0);
$GetIpAddrTable->Call(0, $size, 1);
#### real call
$ip_table = "\0" x unpack("L", $size);
$GetIpAddrTable->Call($ip_table, $size, 1);
#### unpack the MIB_IPADDRROW structure(s) in ip_table
$ips = unpack("L", $ip_table);
$unpack = "L";
for my $i (0..$ips-1) {
foreach my $member (@MIB_IPADDRROW) {
$unpack .= $member->[1];
}
}
@ip_data = unpack($unpack, $ip_table);
#### store ip and mask for interface index
my %ip_data = ();
shift @ip_data;
for my $i (0..$ips-1) {
my %struct;
foreach my $member (@MIB_IPADDRROW) {
$struct{$member->[0]} = shift @ip_data;
}
my $ip = if_ipaddr($struct{dwAddr});
my $if = $struct{dwIndex};
my $mask = if_ipaddr($struct{dwMask});
$ip_data{$if} = [ $ip, $mask ] if $ip ne '0.0.0.0';
}
#### first call to get number of bytes needed
$size = pack("L", 0);
$GetIfTable->Call(0, $size, 1);
#### real call
$if_table = "\0" x unpack("L", $size);
$GetIfTable->Call($if_table, $size, 1);
#### unpack the MIB_IFROW structure(s) in if_table
$ifs = unpack("L", $if_table);
$unpack = "L";
for my $i (0..$ifs-1) {
foreach my $member (@MIB_IFROW) {
$unpack .= $member->[1];
}
}
@if_data = unpack($unpack, $if_table);
#### dump the information
shift @if_data;
for my $i (0..$ifs-1) {
my %struct;
foreach my $member (@MIB_IFROW) {
$struct{$member->[0]} = shift @if_data;
}
my $if_index = $struct{dwIndex};
printf "\n0x%08x", $if_index;
printf " Link encap:%s ", if_type($struct{dwType});
my $hwaddr = if_hwaddr($struct{dwPhysAddrLen}, $struct{bPhysAddr})
+;
printf "HWaddr %s", $hwaddr if $hwaddr;
print "\n";
#### lookup inet addr and Mask from the GetIpAddrTable call
if(exists $ip_data{$if_index}) {
printf " inet addr:%s Mask:%s\n",
$ip_data{$if_index}->[0],
$ip_data{$if_index}->[1],
;
}
printf " MTU:%d Speed:%.2f Mbps\n",
$struct{dwMtu},
$struct{dwSpeed}/1000/1000;
printf " Admin status:%s Oper status:%s\n",
if_admin_status($struct{dwAdminStatus}),
if_oper_status($struct{dwOperStatus});
printf " RX packets:%d dropped:%d errors:%d unknown:%d\n
+",
$struct{dwInUcastPkts} + $struct{dwInNUcastPkts},
$struct{dwInDiscards},
$struct{dwInErrors},
$struct{dwInUnknownProtos},
;
printf " TX packets:%d dropped:%d errors:%d txqueuelen:%
+d\n",
$struct{dwOutUcastPkts} + $struct{dwOutNUcastPkts},
$struct{dwOutDiscards},
$struct{dwOutErrors},
$struct{dwOutQLen},
;
print " Descr: \"", unpack("Z*", $struct{bDescr}), "\"\n
+";
}
#### helper functions
sub if_hwaddr {
my($len, $addr) = @_;
return join(':', map {sprintf '%02x', $_ } unpack('C' x $len, $add
+r));
}
sub if_type {
my($type) = @_;
if($type == 1) { return "Other"; }
if($type == 6) { return "Ethernet"; }
if($type == 9) { return "Tokenring"; }
if($type == 15) { return "FDDI"; }
if($type == 23) { return "PPP"; }
if($type == 24) { return "Local loopback"; }
if($type == 28) { return "SLIP"; }
return "UNKNOWN($type)";
}
sub if_admin_status {
my($status) = @_;
if($status == 1) { return "UP"; }
if($status == 2) { return "DOWN"; }
if($status == 3) { return "TESTING"; }
return "UNKNOWN($status)";
}
sub if_oper_status {
my($status) = @_;
if($status == 0) { return "NON_OPERATIONAL"; }
if($status == 1) { return "UNREACHABLE"; }
if($status == 2) { return "DISCONNECTED"; }
if($status == 3) { return "CONNECTING"; }
if($status == 4) { return "CONNECTED"; }
if($status == 5) { return "OPERATIONAL"; }
return "UNKNOWN($status)";
}
sub if_ipaddr {
my($addr) = @_;
return join(".", unpack("C4", pack("L", $addr)));
}
__END__
PS. there's some error checking here and there to be added, but it's only $VERSION 0.01 ;-) | 