dns.py 文件源码

def get_mdns_sock(self):
        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        if sys.platform == 'darwin':
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
        sock.bind(('', 5353))

        mreq = struct.pack("4sl", socket.inet_aton('224.0.0.251'), socket.INADDR_ANY)
        sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

        return sock