AutoDetectingServerConfig.java 文件源码

private DatagramChannel createReceiveChannel() throws IOException {
    final String nicName = properties.getProperty(PropertiesReader.NETWORK_INTERFACE);
    final NetworkInterface networkInterface = getNetworkInterface(nicName);

    final DatagramChannel channel = DatagramChannel.open(StandardProtocolFamily.INET);
    channel.setOption(StandardSocketOptions.SO_REUSEADDR, true)
            .bind(new InetSocketAddress(ANNOUNCE_PORT))
            .setOption(StandardSocketOptions.IP_MULTICAST_IF, networkInterface);

    final InetAddress group = InetAddress.getByName(MULTICAST_GROUP);
    channel.join(group, networkInterface);

    return channel;
}