Handle ZDO neighbors command returning unsupported status (#228)

Author: puddly

tests/test_commands.py

@@ -543,3 +543,19 @@ class TestSubsystem(t.CommandsBase, subsystem=t.Subsystem.SYS):
     assert Test.from_frame(frames.GeneralFrame(header=Test.header, data=b"")) == Test(
         Data=t.Bytes(b"")
     )
+
+
+def test_neighbors_missing_payload():
+    frame = frames.GeneralFrame(
+        header=t.CommandHeader(
+            id=0xB1,
+            subsystem=t.Subsystem.ZDO,
+            type=t.CommandType.AREQ,
+        ),
+        data=b"\x1F\x82\x84",
+    )
+
+    assert c.ZDO.MgmtLqiRsp.Callback.from_frame(frame) == c.ZDO.MgmtLqiRsp.Callback(
+        Src=0x821F,
+        Status=t.ZDOStatus.NOT_SUPPORTED,
+    )

zigpy_znp/commands/zdo.py

@@ -1181,7 +1181,7 @@ class ZDO(t.CommandsBase, subsystem=t.Subsystem.ZDO):
             t.Param(
                 "Status", t.ZDOStatus, "Status is either Success (0) or Failure (1)"
             ),
-            t.Param("Neighbors", zigpy.zdo.types.Neighbors, "Neighbors"),
+            t.Param("Neighbors", zigpy.zdo.types.Neighbors, "Neighbors", optional=True),
         ),
     )