added othernet to CoreInterface to avoid hasattr checks

daemon/core/nodes/base.py

@@ -1086,11 +1086,11 @@ class CoreNetworkBase(NodeBase):
         for netif in self.netifs(sort=True):
             if not hasattr(netif, "node"):
                 continue
-            linked_node = netif.node
             uni = False
+            linked_node = netif.node
             if linked_node is None:
                 # two layer-2 switches/hubs linked together via linknet()
-                if not hasattr(netif, "othernet"):
+                if not netif.othernet:
                     continue
                 linked_node = netif.othernet
                 if linked_node.id == self.id:

daemon/core/nodes/interface.py

@@ -51,6 +51,7 @@ class CoreInterface:
             raise ValueError
         self.mtu = mtu
         self.net = None
+        self.othernet = None
         self._params = {}
         self.addrlist = []
         self.hwaddr = None

daemon/core/nodes/network.py

@@ -580,7 +580,7 @@ class CoreNetwork(CoreNetworkBase):
         :return: interface the provided network is linked to
         """
         for netif in self.netifs():
-            if hasattr(netif, "othernet") and netif.othernet == net:
+            if netif.othernet == net:
                 return netif
         return None