#!/usr/bin/perl
use warnings;
use strict;
use autodie;

use Data::Dump qw(dump);

$|=1; # flush stdout

my $debug = $ENV{DEBUG} || 0;

my @name_mac_files = ( qw( /dev/shm/sw-name-mac /dev/shm/wap-name-mac ), $ENV{NAME_MAC}, glob '/dev/shm/name-mac*' );
my $mac2name;

foreach my $name_mac ( @name_mac_files ) {
	next unless -e $name_mac;
	open(my $f, '<'. $name_mac);
	my $count = 0;
	while(<$f>) {
		chomp;
		#my ( $ip, $name, $mac ) = split(/ /,$_);
		my ( $name, $mac ) = split(/ /,$_);
		$mac = lc($mac);
		$mac2name->{$mac} = $name;
		$count++;
	}
	warn "## $name_mac $count";
}

sub mac2name {
	my ( $mac, $name ) = @_;

	$mac = lc($mac);
	if ( exists $mac2name->{$mac} ) {
		my $mac_name = $mac2name->{$mac};
		warn "ERROR: name different $name != $mac_name" if $name && $name ne $mac_name;
		#return ( $mac, $mac_name );
		return $mac . ' ' . $mac_name;
	}
	#return ( $mac, $name );
	return $mac;
}

warn "# mac2name = ",dump($mac2name) if $debug;

sub fix_mac {
	my $mac = shift;
	$mac = lc($mac);
	$mac =~ s/^([0-9a-f]):/0$1:/;
	while ( $mac =~ s/:([0-9a-f]):/:0$1:/g ) {};
	$mac =~ s/:([0-9a-f])$/:0$1/;
#	warn "# $mac\n";
	return $mac;
}

while(<>) {
	s/((:?[0-9A-Fa-f]{2}[:-]){5}(:?[0-9A-Fa-f]{2}))/mac2name($1)/ge;
	print;
}