#!/bin/sh

<?

include "/htdocs/phplib/xnode.php";

function add_target($base, $svr, $target)

{

	foreach ($base."/svrlist/server")

	{

		/* Need no routing rule if the interface is the default route. */

		if ("1" == query("defaultroute")) continue;

		/* Not the server we are looking for, try next. */

		if ($svr != query("ipaddr")) continue;

		/* The resolved IP address will be saved under

		 * /runtime/services/dnsmasq/svrlist/server/target.

		 * They are the target IP address of the domain routing rules

		 * and will be used for removing the rules from the routing table.

		 * We also save a copy under

		 * /runtime/inf:#/dnscache/target to preserve the old domain routing

		 * targets when the interface is going down and up. The routing rules

		 * for the old targets will be added in service - 'ROUTE.DOMAIN' when

		 * the interface is comming up. */

		$inf = query("inf");

		$infp = XNODE_getpathbytarget("/runtime", "inf", "uid", $inf, 0);

		if ($infp == "") return;

		foreach ($infp."/dnscache/target")	if ($VaLuE == $target) return;

		foreach ("target")					if ($VaLuE == $target) return;

		/* We only add rules for new target and save them in both places. */

		$addrtype = query($infp."/inet/addrtype");

		if (query($infp."/inet/".$addrtype."/valid")!="1") return;

		if		($addrtype=="ipv4") $gw = query($infp."/inet/ipv4/gateway");

		else if	($addrtype=="ppp4") $gw = query($infp."/inet/ppp4/peer");

		/* Got gateway, add routing command */

		add("target", $target);

		add($infp."/dnscache/target", $target);

		echo 'echo "DOMAINROUTE: '.$target.' via '.$gw.' ('.$inf.') ..." > /dev/console\n';

		echo 'ip route add '.$target.' via '.$gw.' table DOMAIN\n';

		return;

	}

}

function flush_route($base)

{

	foreach ($base."/svrlist/server")

	{

		if ("1" == query("defaultroute")) continue;

		/* Only remove the domain routing rules which added by us (DNS service). */

		foreach ("target")

		{

			echo 'echo "DOMAINROUTE: remove route to '.$VaLuE.' ..." > /dev/console\n';

			echo 'ip route del '.$VaLuE.' table DOMAIN\n';

		}

		$i = query("target#");

		while ($i>0) { del("target"); $i--; }

	}

}

function flush_all($base)

{

	flush_route($base);

	del($base."/svrlist");

}

$dnsbase = "/runtime/services/dnsmasq";

if		($ACTION=="get_addrs")	add_target($dnsbase, $DNS, $TARGET);

else if	($ACTION=="flushroute")	flush_route($dnsbase);

else if	($ACTION=="flush")		flush_all($dnsbase);

?>

exit 0