fix

aioupnp/protocols/ssdp.py

@@ -30,16 +30,19 @@ class SSDPProtocol(MulticastProtocol):
             man=man, mx=1
         )
         log.debug("sending packet to %s:%i: %s", address, SSDP_PORT, packet)
+        print(packet.encode())
         self.transport.sendto(packet.encode().encode(), (address, SSDP_PORT))
 
     async def m_search(self, address, timeout: int = 1, service=UPNP_ORG_IGD) -> SSDPDatagram:
         if (address, service) in self.discover_callbacks:
             return self.discover_callbacks[(address, service)]
 
-        # D-Link, Cisco
-        self.send_m_search_packet(service, address, "\"%s\"" % SSDP_DISCOVER)
+        # D-Link works with both
 
-        # DD-WRT
+        # Cisco only works with quotes
+        self.send_m_search_packet(service, address, '"%s"' % SSDP_DISCOVER)
+
+        # DD-WRT only works without quotes
         self.send_m_search_packet(service, address, SSDP_DISCOVER)
 
         f: Future = Future()

aioupnp/serialization/ssdp.py

@@ -112,8 +112,6 @@ class SSDPDatagram(object):
                 raise UPnPError("required field for {} is missing: {}".format(self._packet_type, attr_name))
             if attr_name == 'mx':
                 value = str(attr)
-            elif attr_name == 'man':
-                value = "\"%s\"" % attr
             else:
                 value = attr
             lines.append("{}: {}".format(attr_name.upper(), value))