br_multicast_has_router_adjacent
bool br_multicast_has_router_adjacent(struct net_device *dev, int proto);
if (!br_multicast_has_router_adjacent(dev, ETH_P_IP))
if (!br_multicast_has_router_adjacent(dev, ETH_P_IPV6))
EXPORT_SYMBOL_GPL(br_multicast_has_router_adjacent);