""" Estimate coordinates from WIFI_POSITIONING and send back """
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 .gps303proto import parse_message, proto_by_name, WIFI_POSITIONING
-from .opencellid import qry_cell
-from .zmsg import Bcast, Resp
+from .gps303proto import parse_message, WIFI_POSITIONING
+from .zmsg import Bcast, Resp, topic
log = getLogger("gps303/lookaside")
def runserver(conf):
+ if conf.get("lookaside", "backend") == "opencellid":
+ qry = import_module(".opencellid", __package__)
+ else:
+ raise NotImplementedError(
+ "Lookaside only implements opencellid backend"
+ )
+ qry.init(conf)
zctx = zmq.Context()
zsub = zctx.socket(zmq.SUB)
zsub.connect(conf.get("collector", "publishurl"))
- topic = pack("B", proto_by_name("WIFI_POSITIONING"))
- zsub.setsockopt(zmq.SUBSCRIBE, topic)
+ zsub.setsockopt(zmq.SUBSCRIBE, topic(WIFI_POSITIONING.PROTO))
zpush = zctx.socket(zmq.PUSH)
zpush.connect(conf.get("collector", "listenurl"))
datetime.fromtimestamp(zmsg.when).astimezone(tz=timezone.utc),
msg,
)
- if not isinstance(msg, WIFI_POSITIONING):
- log.error(
- "IMEI %s from %s at %s: %s",
- zmsg.imei,
- zmsg.peeraddr,
- datetime.fromtimestamp(zmsg.when).astimezone(
- tz=timezone.utc
- ),
- msg,
- )
- continue
- lat, lon = qry_cell(
- conf["opencellid"]["dbfn"], msg.mcc, msg.gsm_cells
+ lat, lon = qry.lookup(msg.mcc, 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,
)
- resp = Resp(imei=zmsg.imei, packet=msg.response(lat=lat, lon=lon))
log.debug("Response for lat=%s, lon=%s: %s", lat, lon, resp)
zpush.send(resp.packed)