diff --git a/daemon/core/api/grpc/server.py b/daemon/core/api/grpc/server.py
index 5fae97dc..ae3ec1ec 100644
--- a/daemon/core/api/grpc/server.py
+++ b/daemon/core/api/grpc/server.py
@@ -232,7 +232,7 @@ class CoreGrpcServer(core_pb2_grpc.CoreApiServicer):
         # add all hooks
         for hook in request.hooks:
             state = EventTypes(hook.state)
-            session.add_hook(state, hook.file, None, hook.data)
+            session.add_hook(state, hook.file, hook.data)
 
         # create nodes
         _, exceptions = grpcutils.create_nodes(session, request.nodes)
@@ -918,7 +918,7 @@ class CoreGrpcServer(core_pb2_grpc.CoreApiServicer):
         session = self.get_session(request.session_id, context)
         hook = request.hook
         state = EventTypes(hook.state)
-        session.add_hook(state, hook.file, None, hook.data)
+        session.add_hook(state, hook.file, hook.data)
         return core_pb2.AddHookResponse(result=True)
 
     def GetMobilityConfigs(
diff --git a/daemon/core/api/tlv/corehandlers.py b/daemon/core/api/tlv/corehandlers.py
index 02a6294c..1a22cedd 100644
--- a/daemon/core/api/tlv/corehandlers.py
+++ b/daemon/core/api/tlv/corehandlers.py
@@ -1501,7 +1501,7 @@ class CoreHandler(socketserver.BaseRequestHandler):
                         return ()
                     state = int(state)
                     state = EventTypes(state)
-                    self.session.add_hook(state, file_name, source_name, data)
+                    self.session.add_hook(state, file_name, data, source_name)
                     return ()
 
             # writing a file to the host
diff --git a/daemon/core/emulator/emudata.py b/daemon/core/emulator/emudata.py
index 6a0ec8a6..79c586a3 100644
--- a/daemon/core/emulator/emudata.py
+++ b/daemon/core/emulator/emudata.py
@@ -1,4 +1,4 @@
-from typing import List, Optional
+from typing import List, Optional, Union
 
 import netaddr
 
@@ -21,7 +21,7 @@ class IdGen:
 
 
 def link_config(
-    network: CoreNetworkBase,
+    node: Union[CoreNetworkBase, PhysicalNode],
     interface: CoreInterface,
     link_options: LinkOptions,
     devname: str = None,
@@ -30,7 +30,7 @@ def link_config(
     """
     Convenience method for configuring a link,
 
-    :param network: network to configure link for
+    :param node: network to configure link for
     :param interface: interface to configure
     :param link_options: data to configure link with
     :param devname: device name, default is None
@@ -49,10 +49,10 @@ def link_config(
 
     # hacky check here, because physical and emane nodes do not conform to the same
     # linkconfig interface
-    if not isinstance(network, (EmaneNet, PhysicalNode)):
+    if not isinstance(node, (EmaneNet, PhysicalNode)):
         config["devname"] = devname
 
-    network.linkconfig(**config)
+    node.linkconfig(**config)
 
 
 class NodeOptions:
diff --git a/daemon/core/emulator/session.py b/daemon/core/emulator/session.py
index 6f112ccf..8259803d 100644
--- a/daemon/core/emulator/session.py
+++ b/daemon/core/emulator/session.py
@@ -196,7 +196,11 @@ class Session:
     def _link_nodes(
         self, node_one_id: int, node_two_id: int
     ) -> Tuple[
-        Optional[NodeBase], Optional[NodeBase], CoreNetworkBase, CoreNetworkBase, GreTap
+        Optional[CoreNode],
+        Optional[CoreNode],
+        Optional[CoreNetworkBase],
+        Optional[CoreNetworkBase],
+        GreTap,
     ]:
         """
         Convenience method for retrieving nodes within link data.
@@ -856,19 +860,19 @@ class Session:
         CoreXmlWriter(self).write(file_name)
 
     def add_hook(
-        self, state: EventTypes, file_name: str, source_name: str, data: str
+        self, state: EventTypes, file_name: str, data: str, source_name: str = None
     ) -> None:
         """
         Store a hook from a received file message.
 
         :param state: when to run hook
         :param file_name: file name for hook
-        :param source_name: source name
         :param data: hook data
+        :param source_name: source name
         :return: nothing
         """
         logging.info(
-            "setting state hook: %s - %s from %s", state, file_name, source_name
+            "setting state hook: %s - %s source(%s)", state, file_name, source_name
         )
         hook = file_name, data
         state_hooks = self._hooks.setdefault(state, [])
diff --git a/daemon/core/nodes/base.py b/daemon/core/nodes/base.py
index 61e9e8fb..71870cd9 100644
--- a/daemon/core/nodes/base.py
+++ b/daemon/core/nodes/base.py
@@ -413,14 +413,14 @@ class CoreNodeBase(NodeBase):
                 netif.setposition()
 
     def commonnets(
-        self, obj: "CoreNodeBase", want_ctrl: bool = False
-    ) -> List[Tuple[NodeBase, CoreInterface, CoreInterface]]:
+        self, node: "CoreNodeBase", want_ctrl: bool = False
+    ) -> List[Tuple["CoreNetworkBase", CoreInterface, CoreInterface]]:
         """
         Given another node or net object, return common networks between
         this node and that object. A list of tuples is returned, with each tuple
         consisting of (network, interface1, interface2).
 
-        :param obj: object to get common network with
+        :param node: node to get common network with
         :param want_ctrl: flag set to determine if control network are wanted
         :return: tuples of common networks
         """
@@ -428,7 +428,7 @@ class CoreNodeBase(NodeBase):
         for netif1 in self.netifs():
             if not want_ctrl and hasattr(netif1, "control"):
                 continue
-            for netif2 in obj.netifs():
+            for netif2 in node.netifs():
                 if netif1.net == netif2.net:
                     common.append((netif1.net, netif1, netif2))
         return common
@@ -1041,7 +1041,7 @@ class CoreNetworkBase(NodeBase):
         """
         pass
 
-    def getlinknetif(self, net: "CoreNetworkBase") -> CoreInterface:
+    def getlinknetif(self, net: "CoreNetworkBase") -> Optional[CoreInterface]:
         """
         Return the interface of that links this net with another net.
 
@@ -1049,7 +1049,7 @@ class CoreNetworkBase(NodeBase):
         :return: interface the provided network is linked to
         """
         for netif in self.netifs():
-            if hasattr(netif, "othernet") and netif.othernet == net:
+            if getattr(netif, "othernet", None) == net:
                 return netif
         return None
 
diff --git a/daemon/core/xml/corexml.py b/daemon/core/xml/corexml.py
index ddb51b28..efbf85c8 100644
--- a/daemon/core/xml/corexml.py
+++ b/daemon/core/xml/corexml.py
@@ -662,7 +662,7 @@ class CoreXmlReader:
             state = EventTypes(state)
             data = hook.text
             logging.info("reading hook: state(%s) name(%s)", state, name)
-            self.session.add_hook(state, name, None, data)
+            self.session.add_hook(state, name, data)
 
     def read_session_origin(self) -> None:
         session_origin = self.scenario.find("session_origin")
diff --git a/daemon/tests/test_grpc.py b/daemon/tests/test_grpc.py
index 5f34e2e2..5e765f42 100644
--- a/daemon/tests/test_grpc.py
+++ b/daemon/tests/test_grpc.py
@@ -450,7 +450,7 @@ class TestGrpc:
         session = grpc_server.coreemu.create_session()
         file_name = "test"
         file_data = "echo hello"
-        session.add_hook(EventTypes.RUNTIME_STATE, file_name, None, file_data)
+        session.add_hook(EventTypes.RUNTIME_STATE, file_name, file_data)
 
         # then
         with client.context_connect():
diff --git a/daemon/tests/test_xml.py b/daemon/tests/test_xml.py
index 897bb6fb..bb5a6bf9 100644
--- a/daemon/tests/test_xml.py
+++ b/daemon/tests/test_xml.py
@@ -23,12 +23,12 @@ class TestXml:
         file_name = "runtime_hook.sh"
         data = "#!/bin/sh\necho hello"
         state = EventTypes.RUNTIME_STATE
-        session.add_hook(state, file_name, None, data)
+        session.add_hook(state, file_name, data)
 
         file_name = "instantiation_hook.sh"
         data = "#!/bin/sh\necho hello"
         state = EventTypes.INSTANTIATION_STATE
-        session.add_hook(state, file_name, None, data)
+        session.add_hook(state, file_name, data)
 
         # save xml
         xml_file = tmpdir.join("session.xml")