Added BeaconPacket

This patch adds the BeaconPacket and BeaconSendThread.
This will enable APRSD server to send a beacon if enabled in
the config.

aprsd/cli_helper.py

@@ -1,9 +1,8 @@
+import click
 from functools import update_wrapper
 import logging
 from pathlib import Path
 import typing as t
-
-import click
 from oslo_config import cfg
 
 import aprsd
@@ -50,9 +49,6 @@ common_options = [
 ]
 
 
-import click
-
-
 class AliasedGroup(click.Group):
     def command(self, *args, **kwargs):
         """A shortcut decorator for declaring and attaching a command to

aprsd/cmds/server.py

@@ -11,7 +11,7 @@ from aprsd import main as aprsd_main
 from aprsd import packets, plugin, threads, utils
 from aprsd.main import cli
 from aprsd.rpc import server as rpc_server
-from aprsd.threads import rx
+from aprsd.threads import rx, tx
 
 
 CONF = cfg.CONF
@@ -107,6 +107,10 @@ def server(ctx, flush):
     process_thread.start()
 
     packets.PacketTrack().restart()
+    if CONF.enable_beacon:
+        LOG.info("Beacon Enabled.  Starting Beacon thread.")
+        bcn_thread = tx.BeaconSendThread()
+        bcn_thread.start()
 
     if CONF.rpc_settings.enabled:
         rpc = rpc_server.APRSDRPCThread()

aprsd/conf/common.py

@@ -70,6 +70,32 @@ aprsd_opts = [
         default=60,
         help="The number of seconds before a packet is not considered a duplicate.",
     ),
+    cfg.BoolOpt(
+        "enable_beacon",
+        default=False,
+        help="Enable sending of a GPS Beacon packet to locate this service. "
+             "Requires latitude and longitude to be set.",
+    ),
+    cfg.IntOpt(
+        "beacon_interval",
+        default=600,
+        help="The number of seconds between beacon packets.",
+    ),
+    cfg.StrOpt(
+        "beacon_symbol",
+        default="/",
+        help="The symbol to use for the GPS Beacon packet. See: http://www.aprs.net/vm/DOS/SYMBOLS.HTM",
+    ),
+    cfg.StrOpt(
+        "latitude",
+        default=None,
+        help="Latitude for the GPS Beacon button.  If not set, the button will not be enabled.",
+    ),
+    cfg.StrOpt(
+        "longitude",
+        default=None,
+        help="Longitude for the GPS Beacon button.  If not set, the button will not be enabled.",
+    ),
 ]
 
 watch_list_opts = [

aprsd/packets/__init__.py

@@ -1,6 +1,6 @@
 from aprsd.packets.core import (  # noqa: F401
-    AckPacket, GPSPacket, MessagePacket, MicEPacket, Packet, RejectPacket,
+    AckPacket, BeaconPacket, GPSPacket, MessagePacket, MicEPacket, Packet,
-    StatusPacket, WeatherPacket,
+    RejectPacket, StatusPacket, WeatherPacket,
 )
 from aprsd.packets.packet_list import PacketList  # noqa: F401
 from aprsd.packets.seen_list import SeenList  # noqa: F401

aprsd/packets/core.py

@@ -466,6 +466,26 @@ class GPSPacket(Packet):
         )
 
 
+@dataclass(unsafe_hash=True)
+class BeaconPacket(GPSPacket):
+    def _build_payload(self):
+        """The payload is the non headers portion of the packet."""
+        time_zulu = self._build_time_zulu()
+        lat = self.convert_latitude(self.latitude)
+        long = self.convert_longitude(self.longitude)
+
+        self.payload = (
+            f"@{time_zulu}z{lat}{self.symbol_table}"
+            f"{long}{self.symbol}APRSD Beacon"
+        )
+
+    def _build_raw(self):
+        self.raw = (
+            f"{self.from_call}>APZ100:"
+            f"{self.payload}"
+        )
+
+
 @dataclass
 class MicEPacket(GPSPacket):
     messagecapable: bool = False

aprsd/threads/tx.py

@@ -37,7 +37,6 @@ msg_throttle_decorator = decorator.ThrottleDecorator(throttle=msg_t)
 ack_throttle_decorator = decorator.ThrottleDecorator(throttle=ack_t)
 
 
-
 @msg_throttle_decorator.sleep_and_retry
 def send(packet: core.Packet, direct=False, aprs_client=None):
     """Send a packet either in a thread or directly to the client."""
@@ -196,3 +195,38 @@ class SendAckThread(aprsd_threads.APRSDThread):
         time.sleep(1)
         self.loop_count += 1
         return True
+
+
+class BeaconSendThread(aprsd_threads.APRSDThread):
+    """Thread that sends a GPS beacon packet periodically.
+
+    Settings are in the [DEFAULT] section of the config file.
+    """
+    _loop_cnt: int = 1
+
+    def __init__(self):
+        super().__init__("BeaconSendThread")
+        self._loop_cnt = 1
+        # Make sure Latitude and Longitude are set.
+        if not CONF.latitude or not CONF.longitude:
+            LOG.error(
+                "Latitude and Longitude are not set in the config file."
+                "Beacon will not be sent and thread is STOPPED.",
+            )
+            self.stop()
+
+    def loop(self):
+        # Only dump out the stats every N seconds
+        if self._loop_cnt % CONF.beacon_interval == 0:
+            pkt = core.BeaconPacket(
+                from_call=CONF.callsign,
+                to_call="APRS",
+                latitude=float(CONF.latitude),
+                longitude=float(CONF.longitude),
+                comment="APRSD GPS Beacon",
+                symbol=CONF.beacon_symbol,
+            )
+            send(pkt, direct=True)
+        self._loop_cnt += 1
+        time.sleep(1)
+        return True

aprsd/utils/objectstore.py

@@ -99,7 +99,6 @@ class ObjectStoreMixin:
                         LOG.debug(
                             f"{self.__class__.__name__}::Loaded {len(self)} entries from disk.",
                         )
-                        #LOG.debug(f"{self.data}")
                     else:
                         LOG.debug(f"{self.__class__.__name__}::No data to load.")
             except (pickle.UnpicklingError, Exception) as ex: