Merge pull request #1228 from GNS3/es-console

Close telnet console after stopping the node. Ref gui/#2330

gns3server/compute/dynamips/nodes/ethernet_switch.py

@@ -166,8 +166,8 @@ class EthernetSwitch(Device):
 
         self._telnet_shell = EthernetSwitchConsole(self)
         self._telnet_shell.prompt = self._name + '> '
-        telnet = create_telnet_shell(self._telnet_shell)
-        self._telnet_server = (yield from asyncio.start_server(telnet.run, self._manager.port_manager.console_host, self.console))
+        self._telnet = create_telnet_shell(self._telnet_shell)
+        self._telnet_server = (yield from asyncio.start_server(self._telnet.run, self._manager.port_manager.console_host, self.console))
 
         self._hypervisor.devices.append(self)
 
@@ -214,7 +214,9 @@ class EthernetSwitch(Device):
         """
         Deletes this Ethernet switch.
         """
-
+        yield from self._telnet.close()
+        self._telnet_server.close()
+        
         for nio in self._nios.values():
             if nio:
                 yield from nio.close()

gns3server/utils/asyncio/telnet_server.py

@@ -209,6 +209,12 @@ class AsyncioTelnetServer:
             yield from connection.disconnected()
             del self._connections[network_writer]
 
+    @asyncio.coroutine
+    def close(self):
+        for writer, connection in self._connections.items():
+            writer.write_eof()
+            yield from writer.drain()
+        
     @asyncio.coroutine
     def client_connected_hook(self):
         pass