Added new PacketCollector

this patch adds the new PacketCollector class.
It's a single point for collecting information about
packets sent and recieved from the APRS client.
Basically instead of having the packetlist call the seen list
when we get a packet, we simply call the PacketCollector.rx(),
which in turn calls each registered PacketMonitor class.

This allows us to decouple the packet stats like classses inside
of APRSD.  More importantly, it allows extensions to append their
own PacketMonitor class to the chain without modifying ARPSD.

aprsd/client.py

@@ -11,7 +11,7 @@ import wrapt
 
 from aprsd import exception
 from aprsd.clients import aprsis, fake, kiss
-from aprsd.packets import core, packet_list
+from aprsd.packets import collector, core
 from aprsd.utils import singleton, trace
 
 
@@ -101,7 +101,8 @@ class Client:
             self._client.stop()
 
     def send(self, packet: core.Packet):
-        packet_list.PacketList().tx(packet)
+        """Send a packet to the network."""
+        collector.PacketCollector().tx(packet)
         self.client.send(packet)
 
     @wrapt.synchronized(lock)

aprsd/cmds/listen.py

@@ -17,6 +17,7 @@ from rich.console import Console
 import aprsd
 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.stats import collector
 from aprsd.threads import keep_alive, rx
@@ -81,7 +82,7 @@ class APRSDListenThread(rx.APRSDRXThread):
                 # This is the listen only command.
                 self.plugin_manager.run(packet)
 
-        packets.PacketList().rx(packet)
+        packet_collector.PacketCollector().rx(packet)
 
 
 @cli.command()

aprsd/cmds/send_message.py

@@ -11,6 +11,7 @@ import aprsd
 from aprsd import cli_helper, client, packets
 from aprsd import conf  # noqa : F401
 from aprsd.main import cli
+from aprsd.packets import collector
 from aprsd.threads import tx
 
 
@@ -103,7 +104,7 @@ def send_message(
         global got_ack, got_response
         cl = client.factory.create()
         packet = cl.decode_packet(packet)
-        packets.PacketList().rx(packet)
+        collector.PacketCollector().rx(packet)
         packet.log("RX")
         # LOG.debug("Got packet back {}".format(packet))
         if isinstance(packet, packets.AckPacket):

aprsd/packets/collector.py

@@ -0,0 +1,42 @@
+from typing import Callable, Protocol, runtime_checkable
+
+from aprsd.packets import core
+from aprsd.utils import singleton
+
+
+@runtime_checkable
+class PacketMonitor(Protocol):
+    """Protocol for Monitoring packets in some way."""
+
+    def rx(self, packet: type[core.Packet]) -> None:
+        """When we get a packet from the network."""
+        ...
+
+    def tx(self, packet: type[core.Packet]) -> None:
+        """When we send a packet out the network."""
+        ...
+
+
+@singleton
+class PacketCollector:
+    def __init__(self):
+        self.monitors: list[Callable] = []
+
+    def register(self, monitor: Callable) -> None:
+        self.monitors.append(monitor)
+
+    def rx(self, packet: type[core.Packet]) -> None:
+        for name in self.monitors:
+            cls = name()
+            if isinstance(cls, PacketMonitor):
+                cls.rx(packet)
+            else:
+                raise TypeError(f"Monitor {name} is not a PacketMonitor")
+
+    def tx(self, packet: type[core.Packet]) -> None:
+        for name in self.monitors:
+            cls = name()
+            if isinstance(cls, PacketMonitor):
+                cls.tx(packet)
+            else:
+                raise TypeError(f"Monitor {name} is not a PacketMonitor")

aprsd/packets/core.py

@@ -89,6 +89,7 @@ class Packet:
     addresse: Optional[str] = field(default=None)
     format: Optional[str] = field(default=None)
     msgNo: Optional[str] = field(default=None)   # noqa: N815
+    ackMsgNo: Optional[str] = field(default=None)   # noqa: N815
     packet_type: Optional[str] = field(default=None)
     timestamp: float = field(default_factory=_init_timestamp, compare=False, hash=False)
     # Holds the raw text string to be sent over the wire

aprsd/packets/packet_list.py

@@ -5,7 +5,7 @@ import threading
 from oslo_config import cfg
 import wrapt
 
-from aprsd.packets import seen_list
+from aprsd.packets import collector, core
 from aprsd.utils import objectstore
 
 
@@ -14,6 +14,7 @@ LOG = logging.getLogger("APRSD")
 
 
 class PacketList(objectstore.ObjectStoreMixin):
+    """Class to keep track of the packets we tx/rx."""
     _instance = None
     lock = threading.Lock()
     _total_rx: int = 0
@@ -31,7 +32,7 @@ class PacketList(objectstore.ObjectStoreMixin):
         return cls._instance
 
     @wrapt.synchronized(lock)
-    def rx(self, packet):
+    def rx(self, packet: type[core.Packet]):
         """Add a packet that was received."""
         self._total_rx += 1
         self._add(packet)
@@ -39,10 +40,9 @@ class PacketList(objectstore.ObjectStoreMixin):
         if not ptype in self.data["types"]:
             self.data["types"][ptype] = {"tx": 0, "rx": 0}
         self.data["types"][ptype]["rx"] += 1
-        seen_list.SeenList().update_seen(packet)
 
     @wrapt.synchronized(lock)
-    def tx(self, packet):
+    def tx(self, packet: type[core.Packet]):
         """Add a packet that was received."""
         self._total_tx += 1
         self._add(packet)
@@ -50,7 +50,6 @@ class PacketList(objectstore.ObjectStoreMixin):
         if not ptype in self.data["types"]:
             self.data["types"][ptype] = {"tx": 0, "rx": 0}
         self.data["types"][ptype]["tx"] += 1
-        seen_list.SeenList().update_seen(packet)
 
     @wrapt.synchronized(lock)
     def add(self, packet):
@@ -67,10 +66,6 @@ class PacketList(objectstore.ObjectStoreMixin):
     def copy(self):
         return self.data.copy()
 
-    @wrapt.synchronized(lock)
-    def set_maxlen(self, maxlen):
-        self.maxlen = maxlen
-
     @wrapt.synchronized(lock)
     def find(self, packet):
         return self.data["packets"][packet.key]
@@ -109,3 +104,9 @@ class PacketList(objectstore.ObjectStoreMixin):
             "packets": pkts,
         }
         return stats
+
+
+# Now register the PacketList with the collector
+# every packet we RX and TX goes through the collector
+# for processing for whatever reason is needed.
+collector.PacketCollector().register(PacketList)

aprsd/packets/seen_list.py

@@ -5,6 +5,7 @@ import threading
 from oslo_config import cfg
 import wrapt
 
+from aprsd.packets import collector, core
 from aprsd.utils import objectstore
 
 
@@ -22,7 +23,6 @@ class SeenList(objectstore.ObjectStoreMixin):
     def __new__(cls, *args, **kwargs):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
-            cls._instance._init_store()
             cls._instance.data = {}
         return cls._instance
 
@@ -37,7 +37,8 @@ class SeenList(objectstore.ObjectStoreMixin):
         return self.data.copy()
 
     @wrapt.synchronized(lock)
-    def update_seen(self, packet):
+    def rx(self, packet: type[core.Packet]):
+        """When we get a packet from the network, update the seen list."""
         callsign = None
         if packet.from_call:
             callsign = packet.from_call
@@ -51,3 +52,11 @@ class SeenList(objectstore.ObjectStoreMixin):
             }
         self.data[callsign]["last"] = datetime.datetime.now()
         self.data[callsign]["count"] += 1
+
+    def tx(self, packet: type[core.Packet]):
+        """We don't care about TX packets."""
+
+
+# Register with the packet collector so we can process the packet
+# when we get it off the client (network)
+collector.PacketCollector().register(SeenList)

aprsd/packets/watch_list.py

@@ -6,6 +6,7 @@ from oslo_config import cfg
 import wrapt
 
 from aprsd import utils
+from aprsd.packets import collector, core
 from aprsd.utils import objectstore
 
 
@@ -23,24 +24,22 @@ class WatchList(objectstore.ObjectStoreMixin):
     def __new__(cls, *args, **kwargs):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
-            cls._instance._init_store()
+            cls._instance._update_from_conf()
-            cls._instance.data = {}
         return cls._instance
 
-    def __init__(self, config=None):
+    def _update_from_conf(self, config=None):
-        CONF.watch_list.packet_keep_count
+        if CONF.watch_list.enabled and CONF.watch_list.callsigns:
-
-        if CONF.watch_list.callsigns:
             for callsign in CONF.watch_list.callsigns:
                 call = callsign.replace("*", "")
                 # FIXME(waboring) - we should fetch the last time we saw
                 # a beacon from a callsign or some other mechanism to find
                 # last time a message was seen by aprs-is.  For now this
                 # is all we can do.
-                self.data[call] = {
+                if call not in self.data:
-                    "last": None,
+                    self.data[call] = {
-                    "packet": None,
+                        "last": None,
-                }
+                        "packet": None,
+                    }
 
     @wrapt.synchronized(lock)
     def stats(self, serializable=False) -> dict:
@@ -61,15 +60,19 @@ class WatchList(objectstore.ObjectStoreMixin):
         return callsign in self.data
 
     @wrapt.synchronized(lock)
-    def update_seen(self, packet):
+    def rx(self, packet: type[core.Packet]) -> None:
-        if packet.addresse:
+        """Track when we got a packet from the network."""
-            callsign = packet.addresse
+        LOG.error(f"WatchList RX {packet}")
-        else:
+        callsign = packet.from_call
-            callsign = packet.from_call
+
         if self.callsign_in_watchlist(callsign):
+            LOG.error(f"Updating WatchList RX {callsign}")
             self.data[callsign]["last"] = datetime.datetime.now()
             self.data[callsign]["packet"] = packet
 
+    def tx(self, packet: type[core.Packet]) -> None:
+        """We don't care about TX packets."""
+
     def last_seen(self, callsign):
         if self.callsign_in_watchlist(callsign):
             return self.data[callsign]["last"]
@@ -113,3 +116,6 @@ class WatchList(objectstore.ObjectStoreMixin):
                 return False
         else:
             return False
+
+
+collector.PacketCollector().register(WatchList)

aprsd/stats/__init__.py

@@ -9,12 +9,12 @@ from aprsd.threads import aprsd
 # Create the collector and register all the objects
 # that APRSD has that implement the stats protocol
 stats_collector = collector.Collector()
-stats_collector.register_producer(app.APRSDStats())
+stats_collector.register_producer(app.APRSDStats)
-stats_collector.register_producer(packet_list.PacketList())
+stats_collector.register_producer(packet_list.PacketList)
-stats_collector.register_producer(watch_list.WatchList())
+stats_collector.register_producer(watch_list.WatchList)
-stats_collector.register_producer(tracker.PacketTrack())
+stats_collector.register_producer(tracker.PacketTrack)
-stats_collector.register_producer(plugin.PluginManager())
+stats_collector.register_producer(plugin.PluginManager)
-stats_collector.register_producer(aprsd.APRSDThreadList())
+stats_collector.register_producer(aprsd.APRSDThreadList)
-stats_collector.register_producer(email.EmailStats())
+stats_collector.register_producer(email.EmailStats)
-stats_collector.register_producer(aprs_client.APRSClientStats())
+stats_collector.register_producer(aprs_client.APRSClientStats)
-stats_collector.register_producer(seen_list.SeenList())
+stats_collector.register_producer(seen_list.SeenList)

aprsd/stats/collector.py

@@ -1,8 +1,9 @@
-from typing import Protocol
+from typing import Callable, Protocol, runtime_checkable
 
 from aprsd.utils import singleton
 
 
+@runtime_checkable
 class StatsProducer(Protocol):
     """The StatsProducer protocol is used to define the interface for collecting stats."""
     def stats(self, serializeable=False) -> dict:
@@ -14,17 +15,17 @@ class StatsProducer(Protocol):
 class Collector:
     """The Collector class is used to collect stats from multiple StatsProducer instances."""
     def __init__(self):
-        self.producers: dict[str, StatsProducer] = {}
+        self.producers: list[Callable] = []
 
     def collect(self, serializable=False) -> dict:
         stats = {}
-        for name, producer in self.producers.items():
+        for name in self.producers:
-            # No need to put in empty stats
+            cls = name()
-            tmp_stats = producer.stats(serializable=serializable)
+            if isinstance(cls, StatsProducer):
-            if tmp_stats:
+                stats[cls.__class__.__name__] = cls.stats(serializable=serializable)
-                stats[name] = tmp_stats
+            else:
+                raise TypeError(f"{cls} is not an instance of StatsProducer")
         return stats
 
-    def register_producer(self, producer: StatsProducer):
+    def register_producer(self, producer_name: Callable):
-        name = producer.__class__.__name__
+        self.producers.append(producer_name)
-        self.producers[name] = producer

aprsd/threads/keep_alive.py

@@ -33,7 +33,7 @@ class KeepAliveThread(APRSDThread):
 
             if "EmailStats" in stats_json:
                 email_stats = stats_json["EmailStats"]
-                if email_stats["last_check_time"]:
+                if email_stats.get("last_check_time"):
                     email_thread_time = utils.strfdelta(now - email_stats["last_check_time"])
                 else:
                     email_thread_time = "N/A"

aprsd/threads/rx.py

@@ -7,6 +7,7 @@ import aprslib
 from oslo_config import cfg
 
 from aprsd import client, packets, plugin
+from aprsd.packets import collector
 from aprsd.packets import log as packet_log
 from aprsd.threads import APRSDThread, tx
 
@@ -116,7 +117,7 @@ class APRSDDupeRXThread(APRSDRXThread):
 
             if not found:
                 # We haven't seen this packet before, so we process it.
-                pkt_list.rx(packet)
+                collector.PacketCollector().rx(packet)
                 self.packet_queue.put(packet)
             elif packet.timestamp - found.timestamp < CONF.packet_dupe_timeout:
                 # If the packet came in within N seconds of the
@@ -127,7 +128,7 @@ class APRSDDupeRXThread(APRSDRXThread):
                     f"Packet {packet.from_call}:{packet.msgNo} already tracked "
                     f"but older than {CONF.packet_dupe_timeout} seconds. processing.",
                 )
-                pkt_list.rx(packet)
+                collector.PacketCollector().rx(packet)
                 self.packet_queue.put(packet)
 
 
@@ -154,7 +155,15 @@ class APRSDProcessPacketThread(APRSDThread):
         """We got an ack for a message, no need to resend it."""
         ack_num = packet.msgNo
         LOG.debug(f"Got ack for message {ack_num}")
-        packets.PacketList().rx(packet)
+        collector.PacketCollector().rx(packet)
+        pkt_tracker = packets.PacketTrack()
+        pkt_tracker.remove(ack_num)
+
+    def process_piggyback_ack(self, packet):
+        """We got an ack embedded in a packet."""
+        ack_num = packet.ackMsgNo
+        LOG.debug(f"Got PiggyBackAck for message {ack_num}")
+        collector.PacketCollector().rx(packet)
         pkt_tracker = packets.PacketTrack()
         pkt_tracker.remove(ack_num)
 
@@ -162,7 +171,7 @@ class APRSDProcessPacketThread(APRSDThread):
         """We got a reject message for a packet.  Stop sending the message."""
         ack_num = packet.msgNo
         LOG.debug(f"Got REJECT for message {ack_num}")
-        packets.PacketList().rx(packet)
+        collector.PacketCollector().rx(packet)
         pkt_tracker = packets.PacketTrack()
         pkt_tracker.remove(ack_num)
 
@@ -200,6 +209,10 @@ class APRSDProcessPacketThread(APRSDThread):
         ):
             self.process_reject_packet(packet)
         else:
+            if hasattr(packet, "ackMsgNo") and packet.ackMsgNo:
+                # we got an ack embedded in this packet
+                # we need to handle the ack
+                self.process_piggyback_ack(packet)
             # Only ack messages that were sent directly to us
             if isinstance(packet, packets.MessagePacket):
                 if to_call and to_call.lower() == our_call:

aprsd/utils/objectstore.py

@@ -70,6 +70,7 @@ class ObjectStoreMixin:
         """Save any queued to disk?"""
         if not CONF.enable_save:
             return
+        self._init_store()
         save_filename = self._save_filename()
         if len(self) > 0:
             LOG.info(