ports.py 文件源码

def _m_search_ssdp(self, local_ip):
        """
        Broadcast a UDP SSDP M-SEARCH packet and return response.
        """
        search_target = "urn:schemas-upnp-org:device:InternetGatewayDevice:1"

        ssdp_request = ''.join(
            ['M-SEARCH * HTTP/1.1\r\n',
            'HOST: 239.255.255.250:1900\r\n',
            'MAN: "ssdp:discover"\r\n',
            'MX: 2\r\n',
            'ST: {0}\r\n'.format(search_target),
            '\r\n']
        )

        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

        sock.bind((local_ip, 10000))

        sock.sendto(ssdp_request, ('239.255.255.250', 1900))
        sock.settimeout(5)

        try:
            return sock.recv(2048)
        except socket.error, err:
            # no reply from IGD, possibly no IGD on LAN
            debug("ports", "send ssdp search")
            return False