Adds netifaces module in the setup dependencies.

gns3server/utils/interfaces.py

@@ -91,7 +91,7 @@ def interfaces():
                 results.append({"id": interface,
                                 "name": interface})
         except ImportError:
-            return
+            raise aiohttp.web.HTTPInternalServerError(text="Could not import netifaces module")
     else:
         try:
             results = get_windows_interfaces()

setup.py

@@ -39,6 +39,9 @@ dependencies = ["aiohttp==0.14.4",
                 "Jinja2==2.7.3",
                 "raven==5.2.0"]
 
+if not sys.platform.startswith("win"):
+    dependencies.append("netifaces==0.10.4")
+
 if sys.version_info == (3, 3):
     dependencies.append("asyncio==3.4.2")