adding example to get switch MAC address table (#26)

examples/Connector/get_switch_mac.py

@@ -0,0 +1,70 @@
+# Copyright (c) 2024 Arista Networks, Inc.
+# Use of this source code is governed by the Apache License 2.0
+# that can be found in the COPYING file.
+
+from cloudvision.Connector.grpc_client import GRPCClient, create_query
+
+from parser import base
+import time
+
+
+def last_move_time(epoch_time):
+
+    if epoch_time == 0.0:
+        return '-'
+
+    return int(time.time() - epoch_time)
+
+
+def get_macs(client, device):
+
+    pathElts = [
+        "Smash",
+        "bridging",
+        "status",
+        "smashFdbStatus"
+    ]
+    query = [
+        create_query([(pathElts, [])], device)
+    ]
+
+    print(f'{"vlan":<6} {"macAddress":<20} {"type":<22} {"intf":<15} '
+          f'{"moves":<6} {"lastMoveTime (seconds)"}')
+
+    for batch in client.get(query):
+        for notif in batch["notifications"]:
+            updates = notif["updates"]
+
+            for k, v in updates.items():
+                mac_add = v["key"]["addr"]
+                vlan = v["key"]["fid"]["value"]
+                intf = v["intf"]
+                moves = v["moves"]
+                last_move = v["lastMoveTime"]
+                mac_type = v["entryType"]["Name"]
+
+                print(f'{vlan:<6} {mac_add:<20} {mac_type:<22} {intf:<15} {moves:<6} '
+                      f'{last_move_time(last_move)}')
+
+    return
+
+
+def main(apiserverAddr, token=None, certs=None, key=None, ca=None):
+
+    with GRPCClient(apiserverAddr, token=token, key=key,
+                    ca=ca, certs=certs) as client:
+
+        get_macs(client, args.device)
+
+    return 0
+
+
+if __name__ == "__main__":
+
+    base.add_argument(
+        "--device", type=str, help="device (by SerialNumber) to subscribe to"
+    )
+    args = base.parse_args()
+
+    exit(main(args.apiserver, certs=args.certFile, key=args.keyFile,
+              ca=args.caFile, token=args.tokenFile))