--- lib/PXElator/network.pm	2009/07/31 17:07:39	82
+++ lib/PXElator/network.pm	2009/08/11 12:38:23	197
@@ -7,30 +7,55 @@
 
 use server;
 
+sub ifconfig {
+	my $dev = shift;
+	`/sbin/ifconfig $dev`
+}
+
 sub tap {
 
+	if ( my $dev = $ENV{DEV} ) {
+		warn "W: running under device $dev, not configuring tap0\n";
+		return;
+	}
+
+	if ( $server::ip !~ m{^172} ) {
+		warn "W: server ip mismetch, not configuring tap0\n";
+		return;
+	}
+
 	my $interfaces = read_file '/etc/network/interfaces';
 
-	if ( $interfaces !~ m{tap0.*$server::ip}s ) {
+	if ( $interfaces !~ m{tap0}s ) {
 
-		system "sudo apt-get install vde2";
+		system "sudo apt-get install -y vde2";
 
-		$interfaces .= qq{
+		write_file '/tmp/interfaces', qq{
 
-	iface tap0 inet static
-	  address $server::ip
-	  netmask $server::netmask
-	  vde2-switch -
+# added by PXElator
+iface tap0 inet static
+	address $server::ip
+	netmask $server::netmask
+	vde2-switch -
+	# setup NAT for vde network
+	post-up sysctl -w net.ipv4.ip_forward=1
+	post-up iptables -t nat -A POSTROUTING -s $server::ip/$server::netmask -o wlan0 -j MASQUERADE
 
 		};
 
-		write_file '/etc/network/interfaces', $interfaces;
+		system q|sudo sh -c 'cat /tmp/interfaces >> /etc/network/interfaces'|;
+		system q|sudo sh -c 'usermod -G vde2-net -a $SUDO_USER'|;
 
 	}
 
-	`/sbin/ifconfig tap0 2>/dev/null` =~ m{UP} || system "sudo ifup tap0";
-
-	1;
+	my $ifconfig = ifconfig('tap0');
+	if ( $ifconfig =~ m{UP} ) {
+		 $ifconfig =~ m{$server::ip}s && return 'up';
+		system("sudo /sbin/ifconfig tap0 $server::ip netmask $server::netmask") == 0 && return "ip changed $server::ip";
+		die "can't change IP address of tap0 to $server::ip";
+	} else {
+		die "bring interface up with: sudo ifup tap0\n";
+	}
 }
 
 1;