NioSocketImpl.java 文件源码

private static SocketOption<?> findOption(int optID) throws SocketException {
    switch (optID) {
        case TCP_NODELAY:
            return StandardSocketOptions.TCP_NODELAY;
        case SO_REUSEADDR:
            return StandardSocketOptions.SO_REUSEADDR;
        case SO_BROADCAST:
            return StandardSocketOptions.SO_BROADCAST;
        case IP_MULTICAST_IF:
            return StandardSocketOptions.IP_MULTICAST_IF;
        case IP_MULTICAST_LOOP:
            return StandardSocketOptions.IP_MULTICAST_LOOP;
        case IP_TOS:
            return StandardSocketOptions.IP_TOS;
        case SO_LINGER:
            return StandardSocketOptions.SO_LINGER;
        case SO_SNDBUF:
            return StandardSocketOptions.SO_SNDBUF;
        case SO_RCVBUF:
            return StandardSocketOptions.SO_RCVBUF;
        case SO_KEEPALIVE:
            return StandardSocketOptions.SO_KEEPALIVE;
        default:
            throw new SocketException("unrecognized TCP option: " + optID);
    }
}