udp.py 文件源码

def __enter__(self):
        # Set up socket
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
        self.sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 10)

        if self.local_port:
            # Bind the socket to a local interface
            self.sock.bind(('', self.local_port))

        return self