464xlat: use a gatewayed route, not point-to-point

                   " added, mIsRunning = " + mIsRunning + " -> true");

            mIsRunning = true;

            // Get the network configuration of the clat interface, store it

            // in our link properties, and stack it on top of the interface

            // it's running on.

            // Create the LinkProperties for the clat interface by fetching the

            // IPv4 address for the interface and adding an IPv4 default route,

            // then stack the LinkProperties on top of the link it's running on.

            // Although the clat interface is a point-to-point tunnel, we don't

            // point the route directly at the interface because some apps don't

            // understand routes without gateways (see, e.g., http://b/9597256

            // http://b/9597516). Instead, set the next hop of the route to the

            // clat IPv4 address itself (for those apps, it doesn't matter what

            // the IP of the gateway is, only that there is one).

            try {

                InterfaceConfiguration config = mNMService.getInterfaceConfig(iface);

                LinkAddress clatAddress = config.getLinkAddress();

                mLP.clear();

                mLP.setInterfaceName(iface);

                RouteInfo ipv4Default = new RouteInfo(new LinkAddress(Inet4Address.ANY, 0), null,

                                                      iface);

                RouteInfo ipv4Default = new RouteInfo(new LinkAddress(Inet4Address.ANY, 0),

                                                      clatAddress.getAddress(), iface);

                mLP.addRoute(ipv4Default);

                mLP.addLinkAddress(config.getLinkAddress());

                mLP.addLinkAddress(clatAddress);

                mTracker.addStackedLink(mLP);

                Slog.i(TAG, "Adding stacked link. tracker LP: " +

                       mTracker.getLinkProperties());