// vpnc-script-win.js
//
// Sets up the Network interface and the routes
// needed by vpnc.

// --------------------------------------------------------------
// Utilities
// --------------------------------------------------------------

function echo(msg)
{
	WScript.echo(msg);
}

function run(cmd)
{
	return (ws.Exec(cmd).StdOut.ReadAll());
}

function getDefaultGateway()
{
	if (run("route print").match(/Default Gateway: *(.*)/)) {
		return (RegExp.$1);
	}
	return ("");
}

function isExistingRoute(network)
{
	if (run("route print " + network).match(network)) {
		return true;
	} else {
		return false;
	}
}

// --------------------------------------------------------------
// Script starts here
// --------------------------------------------------------------

var ws = WScript.CreateObject("WScript.Shell");
var env = ws.Environment("Process");

switch (env("reason")) {
case "pre-init":
	break;
case "connect":
	var gw = getDefaultGateway();
	echo("VPN Gateway: " + env("VPNGATEWAY"));
	echo("Internal Address: " + env("INTERNAL_IP4_ADDRESS"));
  	echo("Internal Netmask: " + env("INTERNAL_IP4_NETMASK"));
	echo("Interface: \"" + env("TUNDEV") + "\"");

        echo("Configuring \"" + env("TUNDEV") + "\" interface...");
	run("netsh interface ip set address \"" + env("TUNDEV") + "\" static " +
	    env("INTERNAL_IP4_ADDRESS") + " 255.255.0.0");
    echo("netsh interface ip set address \"" + env("TUNDEV") + "\" static " + 
		env("INTERNAL_IP4_ADDRESS") + " 255.255.0.0");
		
	// Add direct route for the VPN gateway to avoid routing loops
	run("route add " + env("VPNGATEWAY") +
            " mask 255.255.255.255 " + gw);
	echo("route add " + env("VPNGATEWAY") +
            " mask 255.255.255.255 " + gw);
			
        if (env("INTERNAL_IP4_NBNS")) {
		var wins = env("INTERNAL_IP4_NBNS").split(/ /);
		for (var i = 0; i < wins.length; i++) {
	                run("netsh interface ip add wins \"" +
			    env("TUNDEV") + "\" " + wins[i]
  			    + " index=" + (i+1));
	      echo("netsh interface ip add wins \"" +
			    env("TUNDEV") + "\" " + wins[i]
  			    + " index=" + (i+1));

		}
	}

        if (env("INTERNAL_IP4_DNS")) {
		var dns = env("INTERNAL_IP4_DNS").split(/ /);
		for (var i = 0; i < dns.length; i++) {
	                run("netsh interface ip add dns \"" +
			    env("TUNDEV") + "\" " + dns[i]
  			    + " index=" + (i+1));
	      echo("netsh interface ip add dns \"" +
			    env("TUNDEV") + "\" " + dns[i]
  			    + " index=" + (i+1));
		}
	}
	echo("done.");

	// Add internal network routes
        echo("Configuring networks:");
        if (env("CISCO_SPLIT_INC")) {
	    	for (var i = 0 ; i < parseInt(env("CISCO_SPLIT_INC")); i++) {
			var network = env("CISCO_SPLIT_INC_" + i + "_ADDR");
			var netmask = env("CISCO_SPLIT_INC_" + i + "_MASK");
			var netmasklen = env("CISCO_SPLIT_INC_" + i +
					 "_MASKLEN");
			if (!isExistingRoute(network)) {		 
				run("route add " + network + " mask " + netmask
                	     + " " + env("INTERNAL_IP4_ADDRESS"));
				echo("route add " + network + " mask " + netmask
                	     + " " + env("INTERNAL_IP4_ADDRESS"));
			} else {
				echo("network: " + network + " already exists. Not adding it to route table.");
			}
		}
	} else {
		echo("Gateway did not provide network configuration.");
	}
	echo("Route configuration done.");
		
	if (env("CISCO_BANNER")) {
		echo("--------------------------------------------------");
		echo(env("CISCO_BANNER"));
		echo("--------------------------------------------------");
	}	
	break;
case "disconnect":
 	// Delete direct route for the VPN gateway to avoid
	run("route delete " + env("VPNGATEWAY") + " mask 255.255.255.255");
}