Adapt 'show muxcable tunnel-route' for prefix route based mux neighbors (sonic-net#4007)

What I did
Mux neighbors now use prefix-based routes based on changes from the following PR:
sonic-net/sonic-swss#3722
Presence of route prefix for neighbors does not mean tunnel-route use anymore. Show command now uses nexthop type to distinguish between tunnel and normal neighbor route.

How to verify it
Verified output on hardware.

Signed-off-by: Manas Kumar Mandal <[email protected]>

Author: manamand2020

show/muxcable.py

@@ -608,13 +608,33 @@ def get_tunnel_route_per_port(db, port_tunnel_route, per_npu_configdb, per_npu_a
         dest_address = mux_cfg_dict.get(name, None)
 
         if dest_address is not None:
+            # Check kernel tunnel route
             kernel_route_keys = per_npu_appl_db[asic_id].keys(
                 per_npu_appl_db[asic_id].APPL_DB, 'TUNNEL_ROUTE_TABLE:*{}'.format(dest_address))
             if_kernel_tunnel_route_programed = kernel_route_keys is not None and len(kernel_route_keys)
 
+            # Mux neighbors use prefix based routes
+            # Check ASIC route with nexthop type verification
             asic_route_keys = per_npu_asic_db[asic_id].keys(
                 per_npu_asic_db[asic_id].ASIC_DB, 'ASIC_STATE:SAI_OBJECT_TYPE_ROUTE_ENTRY:*{}*'.format(dest_address))
-            if_asic_tunnel_route_programed = asic_route_keys is not None and len(asic_route_keys)
+
+            if_asic_tunnel_route_programed = False
+            if asic_route_keys is not None and len(asic_route_keys):
+                # Get the route entry to check nexthop type
+                for route_key in asic_route_keys:
+                    route_data = per_npu_asic_db[asic_id].get_all(per_npu_asic_db[asic_id].ASIC_DB, route_key)
+                    nexthop_id = route_data.get('SAI_ROUTE_ENTRY_ATTR_NEXT_HOP_ID', None)
+
+                    if nexthop_id:
+                        # Check nexthop type
+                        nexthop_key = 'ASIC_STATE:SAI_OBJECT_TYPE_NEXT_HOP:{}'.format(nexthop_id)
+                        nexthop_data = per_npu_asic_db[asic_id].get_all(per_npu_asic_db[asic_id].ASIC_DB, nexthop_key)
+                        nexthop_type = nexthop_data.get('SAI_NEXT_HOP_ATTR_TYPE', None)
+
+                        # Only count as tunnel route if nexthop type is tunnel
+                        if nexthop_type == 'SAI_NEXT_HOP_TYPE_TUNNEL_ENCAP':
+                            if_asic_tunnel_route_programed = True
+                            break
 
             if if_kernel_tunnel_route_programed or if_asic_tunnel_route_programed:
                 port_tunnel_route["TUNNEL_ROUTE"][port] = port_tunnel_route["TUNNEL_ROUTE"].get(port, {})

tests/mock_tables/asic_db.json

@@ -20,6 +20,19 @@
      		"oid:0xd00000000056d": "oid:0xd",
 		"oid:0x10000000004a4": "oid:0x1690000000001"
      },
+     "ASIC_STATE:SAI_OBJECT_TYPE_NEXT_HOP:oid:0x40000000015d8": {
+         "SAI_NEXT_HOP_ATTR_TYPE": "SAI_NEXT_HOP_TYPE_TUNNEL_ENCAP",
+         "SAI_NEXT_HOP_ATTR_TUNNEL_ID": "oid:0x2a000000000520"
+     },
+     "ASIC_STATE:SAI_OBJECT_TYPE_NEXT_HOP:oid:0x40000000006b3": {
+         "SAI_NEXT_HOP_ATTR_TYPE": "SAI_NEXT_HOP_TYPE_IP",
+         "SAI_NEXT_HOP_ATTR_IP": "10.3.1.1",
+         "SAI_NEXT_HOP_ATTR_ROUTER_INTERFACE_ID": "oid:0x6000000000501"
+     },
+     "ASIC_STATE:SAI_OBJECT_TYPE_ROUTE_ENTRY:{\"dest\":\"10.3.1.1\",\"switch_id\":\"oid:0x21000000000000\",\"vr\":\"oid:0x300000000007c\"}": {
+        "SAI_ROUTE_ENTRY_ATTR_PACKET_ACTION": "SAI_PACKET_ACTION_FORWARD",
+        "SAI_ROUTE_ENTRY_ATTR_NEXT_HOP_ID": "oid:0x40000000006b3"
+    },
      "ASIC_STATE:SAI_OBJECT_TYPE_ROUTE_ENTRY:{\"dest\":\"10.2.1.1\",\"switch_id\":\"oid:0x21000000000000\",\"vr\":\"oid:0x300000000007c\"}": {
         "SAI_ROUTE_ENTRY_ATTR_PACKET_ACTION": "SAI_PACKET_ACTION_FORWARD",
         "SAI_ROUTE_ENTRY_ATTR_NEXT_HOP_ID": "oid:0x40000000015d8"

tests/muxcable_test.py

@@ -569,7 +569,7 @@
             "server_ipv4": {
                 "DEST": "10.2.1.1",
                 "kernel": 1,
-                "asic": 1
+                "asic": true
             }
         },
         "Ethernet4": {
@@ -583,7 +583,7 @@
             "soc_ipv6": {
                 "DEST": "fc00::76",
                 "kernel": false,
-                "asic": 1
+                "asic": true
             }
         }
     }
@@ -605,7 +605,7 @@
             "server_ipv4": {
                 "DEST": "10.2.1.1",
                 "kernel": 1,
-                "asic": 1
+                "asic": true
             }
         }
     }