#!/usr/bin/perl -w
# by trevelyn.
#
use warnings;
use Net::Pcap;
use NetPacket::Ethernet;
use NetPacket::IP;
use NetPacket::TCP;
my $error;
my $type = 'DLT_IEEE802_11';
my $device = $ARGV[0];
my $WiFiobject = Net::Pcap::open_live($device, 2048, 1, -1, \$error);
my $w802 = Net::Pcap::datalink($type);
Net::Pcap::set_datalink($Wifiobject, $w802);

unless (defined $WiFiobject) { die 'Unable to create packet capture on device ', $device, ' - ', $error; }

Net::Pcap::loop($WiFiobject, -1, \&syn_packets, '') || die 'Unable to perform packet capture';
Net::Pcap::close($WiFiobject);

sub syn_packets {
        my ($user_data, $header, $packet) = @_;
        my $macaddr = NetPacket::Ethernet->decode($packet);
        print "$macaddr->{'src_mac'},  $macaddr->{'dest_mac'}\n";

}