This may fix "The semaphore timeout period has expired" error on Windows. #311.

gns3server/modules/dynamips/dynamips_hypervisor.py

@@ -81,8 +81,8 @@ class DynamipsHypervisor:
         while time.time() - begin < timeout:
             yield from asyncio.sleep(0.01)
             try:
-                self._reader, self._writer = yield from asyncio.open_connection(host, self._port)
-            except OSError as e:
+                self._reader, self._writer = yield from asyncio.wait_for(asyncio.open_connection(host, self._port), timeout=1)
+            except (asyncio.TimeoutError, OSError) as e:
                 last_exception = e
                 continue
             connection_success = True

gns3server/modules/nios/nio.py

@@ -30,8 +30,6 @@ class NIO(object):
 
     def __init__(self):
 
-        # create an unique name
-        self._name = 'nio-{}'.format(uuid.uuid4())
         self._capturing = False
         self._pcap_output_file = ""
         self._pcap_data_link_type = ""
@@ -78,23 +76,3 @@ class NIO(object):
         """
 
         return self._pcap_data_link_type
-
-
-    def __str__(self):
-        """
-        NIO string representation.
-
-        :returns: NIO name
-        """
-
-        return self._name
-
-    @property
-    def name(self):
-        """
-        Returns the NIO name.
-
-        :returns: NIO name
-        """
-
-        return self._name