def discover(self):
service = "ssdp:all"
group = ("239.255.255.250", 1900)
message = "\r\n".join([
'M-SEARCH * HTTP/1.1', 'HOST: {0}:{1}', 'MAN: "ssdp:discover"',
'ST: {st}', 'MX: 3', '', ''
])
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM,
socket.IPPROTO_UDP)
sock.settimeout(5)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 2)
sock.sendto(message.format(*group, st=service), group)
while True:
try:
response = SSDPResponse(sock.recv(1024))
if response.type == SSDPResponse.ST_ROOT_DEVICE:
pass
elif response.type == SSDPResponse.ST_DEVICE:
device = Device.fromSSDPResponse(response)
self.devices[response.uuid] = device
except socket.timeout:
break
self.__discoveryDone()
