Fix: correctly handle that lldp_loc_man_addr contains only IPv6 address without IPv4 address (#164)

* Fix mgmt_ip_sub_oid default value to prevent later exception
* Refix
* Reimplement LLDPLocManAddrUpdater
* Fix test case
* Revert some back and fix lookup()

Author: qiluo-msft

src/sonic_ax_impl/mibs/ieee802_1ab.py

@@ -317,6 +317,9 @@ def reinit_data(self):
                 if '.' in mgmt_ip:
                     mgmt_ip_sub_oid = (addr_subtype_sub_oid, *[int(i) for i in mgmt_ip.split('.')])
                     break
+            else:
+                logger.error("Could not find IPv4 address in lldp_loc_man_addr")
+                return
         except ValueError:
             logger.error("Invalid local mgmt IP {}".format(self.mgmt_ip_str))
             return
@@ -334,12 +337,12 @@ def update_data(self):
 
     def get_next(self, sub_id):
         right = bisect_right(self.man_addr_list, sub_id)
-        if right == len(self.man_addr_list):
+        if right >= len(self.man_addr_list):
             return None
         return self.man_addr_list[right]
 
     def lookup(self, sub_id, callable):
-        if len(sub_id) == 0:
+        if sub_id not in self.man_addr_list:
             return None
         return callable(sub_id)
 

tests/namespace/test_lldp.py

@@ -110,11 +110,17 @@ def test_subtype_lldp_loc_sys_data(self):
             print(ret)
 
     def test_subtype_lldp_loc_man_addr_table(self):
-        for entry in range(3, 7):
-            mib_entry = self.lut[(1, 0, 8802, 1, 1, 2, 1, 3, 8, 1, entry)]
-            ret = mib_entry(sub_id=(1,))
-            self.assertIsNotNone(ret)
-            print(ret)
+        oid = ObjectIdentifier(13, 0, 1, 0, (1, 0, 8802, 1, 1, 2, 1, 3, 8, 1, 3, 1, 4))
+        get_pdu = GetNextPDU(
+            header=PDUHeader(1, PduTypes.GET, 16, 0, 42, 0, 0, 0),
+            oids=[oid]
+        )
+
+        response = get_pdu.make_response(self.lut)
+        value0 = response.values[0]
+        self.assertEqual(value0.type_, ValueType.INTEGER)
+        self.assertEqual(value0.data, 5)
+
 
     def test_subtype_lldp_rem_man_addr_table(self):
         for entry in range(3, 6):

tests/test_lldp.py

@@ -89,11 +89,17 @@ def test_subtype_lldp_loc_sys_data(self):
             print(ret)
 
     def test_subtype_lldp_loc_man_addr_table(self):
-        for entry in range(3, 7):
-            mib_entry = self.lut[(1, 0, 8802, 1, 1, 2, 1, 3, 8, 1, entry)]
-            ret = mib_entry(sub_id=(1,))
-            self.assertIsNotNone(ret)
-            print(ret)
+        oid = ObjectIdentifier(13, 0, 1, 0, (1, 0, 8802, 1, 1, 2, 1, 3, 8, 1, 3, 1, 4))
+        get_pdu = GetNextPDU(
+            header=PDUHeader(1, PduTypes.GET, 16, 0, 42, 0, 0, 0),
+            oids=[oid]
+        )
+
+        response = get_pdu.make_response(self.lut)
+        value0 = response.values[0]
+        self.assertEqual(value0.type_, ValueType.INTEGER)
+        self.assertEqual(value0.data, 5)
+
 
     def test_subtype_lldp_rem_man_addr_table(self):
         for entry in range(3, 6):