-""" Estimate coordinates from WIFI_POSITIONING and send back """
-
-from configparser import ConfigParser
-from datetime import datetime, timezone
-from importlib import import_module
-from logging import getLogger
-from os import umask
-from struct import pack
-import zmq
-
-from . import common
-from .zx303proto import parse_message, proto_name, WIFI_POSITIONING
-from .zmsg import Bcast, Resp, topic
-
-log = getLogger("loctrkd/lookaside")
-
-
-def runserver(conf: ConfigParser) -> None:
- qry = import_module("." + conf.get("lookaside", "backend"), __package__)
- qry.init(conf)
- # Is this https://github.com/zeromq/pyzmq/issues/1627 still not fixed?!
- zctx = zmq.Context() # type: ignore
- zsub = zctx.socket(zmq.SUB) # type: ignore
- zsub.connect(conf.get("collector", "publishurl"))
- zsub.setsockopt(zmq.SUBSCRIBE, topic(proto_name(WIFI_POSITIONING)))
- zpush = zctx.socket(zmq.PUSH) # type: ignore
- zpush.connect(conf.get("collector", "listenurl"))
-
- try:
- while True:
- zmsg = Bcast(zsub.recv())
- msg = parse_message(zmsg.packet)
- log.debug(
- "IMEI %s from %s at %s: %s",
- zmsg.imei,
- zmsg.peeraddr,
- datetime.fromtimestamp(zmsg.when).astimezone(tz=timezone.utc),
- msg,
- )
- try:
- lat, lon = qry.lookup(
- msg.mcc, msg.mnc, msg.gsm_cells, msg.wifi_aps
- )
- resp = Resp(
- imei=zmsg.imei,
- when=zmsg.when, # not the current time, but the original!
- packet=msg.Out(latitude=lat, longitude=lon).packed,
- )
- log.debug("Response for lat=%s, lon=%s: %s", lat, lon, resp)
- zpush.send(resp.packed)
- except Exception as e:
- log.warning("Lookup for %s resulted in %s", msg, e)
-
- except KeyboardInterrupt:
- zsub.close()
- zpush.close()
- zctx.destroy() # type: ignore
- qry.shut()
-
-
-if __name__.endswith("__main__"):
- runserver(common.init(log))