Added config for enable_seen_list

This patch allows the admin to disable the callsign seen list
packet tracking feature.

aprsd/cmds/listen.py

@@ -19,6 +19,7 @@ from aprsd import cli_helper, client, packets, plugin, threads
 from aprsd.main import cli
 from aprsd.packets import collector as packet_collector
 from aprsd.packets import log as packet_log
+from aprsd.packets import seen_list
 from aprsd.stats import collector
 from aprsd.threads import keep_alive, rx
 from aprsd.threads import stats as stats_thread
@@ -195,6 +196,10 @@ def listen(
     keepalive = keep_alive.KeepAliveThread()
     # keepalive.start()
 
+    if not CONF.enable_seen_list:
+        # just deregister the class from the packet collector
+        packet_collector.PacketCollector().unregister(seen_list.SeenList)
+
     pm = None
     pm = plugin.PluginManager()
     if load_plugins:

aprsd/cmds/server.py

@@ -10,6 +10,8 @@ from aprsd import cli_helper, client
 from aprsd import main as aprsd_main
 from aprsd import packets, plugin, threads, utils
 from aprsd.main import cli
+from aprsd.packets import collector as packet_collector
+from aprsd.packets import seen_list
 from aprsd.threads import keep_alive, log_monitor, registry, rx
 from aprsd.threads import stats as stats_thread
 from aprsd.threads import tx
@@ -108,6 +110,10 @@ def server(ctx, flush):
     keepalive = keep_alive.KeepAliveThread()
     keepalive.start()
 
+    if not CONF.enable_seen_list:
+        # just deregister the class from the packet collector
+        packet_collector.PacketCollector().unregister(seen_list.SeenList)
+
     stats_store_thread = stats_thread.APRSDStatsStoreThread()
     stats_store_thread.start()
 

aprsd/conf/common.py

@@ -125,6 +125,12 @@ aprsd_opts = [
         default=20,
         help="The maximum number of packets to send in the stats dict for admin ui.",
     ),
+    cfg.BoolOpt(
+        "enable_seen_list",
+        default=True,
+        help="Enable the Callsign seen list tracking feature.  This allows aprsd to keep track of "
+             "callsigns that have been seen and when they were last seen.",
+    ),
 ]
 
 watch_list_opts = [

aprsd/packets/collector.py

@@ -29,6 +29,9 @@ class PacketCollector:
     def register(self, monitor: Callable) -> None:
         self.monitors.append(monitor)
 
+    def unregister(self, monitor: Callable) -> None:
+        self.monitors.remove(monitor)
+
     def rx(self, packet: type[core.Packet]) -> None:
         for name in self.monitors:
             cls = name()