UDP Listener Config
[config.listener.v3.UdpListenerConfig proto]
() Used to look up UDP listener factory, matches “raw_udp_listener” or “quic_listener” to create a specific udp listener. If not specified, treat as “raw_udp_listener”.
(Any) Used to create a specific listener factory. To some factory, e.g. “raw_udp_listener”, config is not needed.