add support for sending out byebye notifications...

[git-p4: depot-paths = "//depot/": change = 726]

SSDP.py

@@ -35,6 +35,14 @@ class SSDPServer(DatagramProtocol):
     elements = {}
     known = {}
 
+    def doStop(self):
+	'''Make sure we send out the byebye notifications.'''
+
+        self.transport.write('foobar', (SSDP_ADDR, SSDP_PORT))
+	for st in self.known:
+	    self.doByebye(st)
+	DatagramProtocol.doStop(self)
+
     def datagramReceived(self, data, (host, port)):
         """Handle a received multicast datagram."""
 
@@ -104,6 +112,22 @@ class SSDPServer(DatagramProtocol):
         self.known[st]['CACHE-CONTROL'] = 'max-age=1800'
 	self.doNotify(st)
 
+    def doByebye(self, st):
+	"""Do byebye"""
+
+        log.msg('Sending byebye notification for %s' % st)
+
+	resp = [ 'NOTIFY * HTTP/1.1',
+		'Host: %s:%d' % (SSDP_ADDR, SSDP_PORT),
+		'NTS: ssdp:byebye',
+	    ]
+	stcpy = dict(self.known[st].iteritems())
+	stcpy['NT'] = stcpy['ST']
+	del stcpy['ST']
+	resp.extend(map(lambda x: ': '.join(x), stcpy.iteritems()))
+	resp.extend(('', ''))
+        self.transport.write('\r\n'.join(resp), (SSDP_ADDR, SSDP_PORT))
+
     def doNotify(self, st):
 	"""Do notification"""