226 lines
7.2 KiB
Python
226 lines
7.2 KiB
Python
import logging
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import threading
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import time
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import random
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import socket
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from functools import reduce
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from operator import and_
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from owrx.config import Config
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from owrx.version import openwebrx_version
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from owrx.locator import Locator
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from owrx.metrics import Metrics, CounterMetric
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logger = logging.getLogger(__name__)
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class PskReporterDummy(object):
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"""
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used in place of the PskReporter when reporting is disabled.
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does nothing.
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"""
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def spot(self, spot):
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pass
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def cancelTimer(self):
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pass
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class PskReporter(object):
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sharedInstance = None
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creationLock = threading.Lock()
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interval = 300
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supportedModes = ["FT8", "FT4", "JT9", "JT65", "JS8"]
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@staticmethod
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def getSharedInstance():
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with PskReporter.creationLock:
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if PskReporter.sharedInstance is None:
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if Config.get()["pskreporter_enabled"]:
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PskReporter.sharedInstance = PskReporter()
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else:
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PskReporter.sharedInstance = PskReporterDummy()
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return PskReporter.sharedInstance
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@staticmethod
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def stop():
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if PskReporter.sharedInstance:
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PskReporter.sharedInstance.cancelTimer()
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def __init__(self):
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self.spots = []
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self.spotLock = threading.Lock()
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self.uploader = Uploader()
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self.timer = None
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metrics = Metrics.getSharedInstance()
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self.dupeCounter = CounterMetric()
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metrics.addMetric("pskreporter.duplicates", self.dupeCounter)
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self.spotCounter = CounterMetric()
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metrics.addMetric("pskreporter.spots", self.spotCounter)
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def scheduleNextUpload(self):
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if self.timer:
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return
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delay = PskReporter.interval + random.uniform(0, 30)
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logger.debug("scheduling next pskreporter upload in %f seconds", delay)
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self.timer = threading.Timer(delay, self.upload)
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self.timer.start()
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def spotEquals(self, s1, s2):
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keys = ["callsign", "timestamp", "locator", "mode", "msg"]
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return reduce(and_, map(lambda key: s1[key] == s2[key], keys))
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def spot(self, spot):
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if not spot["mode"] in PskReporter.supportedModes:
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return
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with self.spotLock:
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if any(x for x in self.spots if self.spotEquals(spot, x)):
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# dupe
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self.dupeCounter.inc()
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else:
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self.spotCounter.inc()
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self.spots.append(spot)
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self.scheduleNextUpload()
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def upload(self):
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try:
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with self.spotLock:
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spots = self.spots
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self.spots = []
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if spots:
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self.uploader.upload(spots)
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except Exception:
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logger.exception("Failed to upload spots")
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self.timer = None
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self.scheduleNextUpload()
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def cancelTimer(self):
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if self.timer:
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self.timer.cancel()
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class Uploader(object):
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receieverDelimiter = [0x99, 0x92]
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senderDelimiter = [0x99, 0x93]
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def __init__(self):
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self.sequence = 0
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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def upload(self, spots):
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logger.debug("uploading %i spots", len(spots))
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for packet in self.getPackets(spots):
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self.socket.sendto(packet, ("report.pskreporter.info", 4739))
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def getPackets(self, spots):
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encoded = [self.encodeSpot(spot) for spot in spots]
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def chunks(l, n):
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"""Yield successive n-sized chunks from l."""
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for i in range(0, len(l), n):
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yield l[i : i + n]
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rHeader = self.getReceiverInformationHeader()
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rInfo = self.getReceiverInformation()
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sHeader = self.getSenderInformationHeader()
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packets = []
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# 50 seems to be a safe bet
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for chunk in chunks(encoded, 50):
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sInfo = self.getSenderInformation(chunk)
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length = 16 + len(rHeader) + len(sHeader) + len(rInfo) + len(sInfo)
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header = self.getHeader(length)
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packets.append(header + rHeader + sHeader + rInfo + sInfo)
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return packets
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def getHeader(self, length):
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self.sequence += 1
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return bytes(
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# protocol version
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[0x00, 0x0A]
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+ list(length.to_bytes(2, "big"))
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+ list(int(time.time()).to_bytes(4, "big"))
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+ list(self.sequence.to_bytes(4, "big"))
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+ list((id(self) & 0xFFFFFFFF).to_bytes(4, "big"))
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)
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def encodeString(self, s):
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return [len(s)] + list(s.encode("utf-8"))
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def encodeSpot(self, spot):
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return bytes(
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self.encodeString(spot["callsign"])
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+ list(int(spot["freq"]).to_bytes(4, "big"))
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+ list(int(spot["db"]).to_bytes(1, "big", signed=True))
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+ self.encodeString(spot["mode"])
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+ self.encodeString(spot["locator"])
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# informationsource. 1 means "automatically extracted
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+ [0x01]
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+ list(int(spot["timestamp"] / 1000).to_bytes(4, "big"))
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)
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def getReceiverInformationHeader(self):
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return bytes(
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# id, length
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[0x00, 0x03, 0x00, 0x24]
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+ Uploader.receieverDelimiter
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# number of fields
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+ [0x00, 0x03, 0x00, 0x00]
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# receiverCallsign
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+ [0x80, 0x02, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# receiverLocator
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+ [0x80, 0x04, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# decodingSoftware
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+ [0x80, 0x08, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# padding
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+ [0x00, 0x00]
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)
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def getReceiverInformation(self):
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pm = Config.get()
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callsign = pm["pskreporter_callsign"]
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locator = Locator.fromCoordinates(pm["receiver_gps"])
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decodingSoftware = "OpenWebRX " + openwebrx_version
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body = [b for s in [callsign, locator, decodingSoftware] for b in self.encodeString(s)]
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body = self.pad(body, 4)
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body = bytes(Uploader.receieverDelimiter + list((len(body) + 4).to_bytes(2, "big")) + body)
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return body
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def getSenderInformationHeader(self):
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return bytes(
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# id, length
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[0x00, 0x02, 0x00, 0x3C]
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+ Uploader.senderDelimiter
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# number of fields
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+ [0x00, 0x07]
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# senderCallsign
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+ [0x80, 0x01, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# frequency
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+ [0x80, 0x05, 0x00, 0x04, 0x00, 0x00, 0x76, 0x8F]
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# sNR
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+ [0x80, 0x06, 0x00, 0x01, 0x00, 0x00, 0x76, 0x8F]
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# mode
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+ [0x80, 0x0A, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# senderLocator
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+ [0x80, 0x03, 0xFF, 0xFF, 0x00, 0x00, 0x76, 0x8F]
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# informationSource
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+ [0x80, 0x0B, 0x00, 0x01, 0x00, 0x00, 0x76, 0x8F]
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# flowStartSeconds
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+ [0x00, 0x96, 0x00, 0x04]
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)
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def getSenderInformation(self, chunk):
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sInfo = self.padBytes(b"".join(chunk), 4)
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sInfoLength = len(sInfo) + 4
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return bytes(Uploader.senderDelimiter) + sInfoLength.to_bytes(2, "big") + sInfo
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def pad(self, b, l):
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return b + [0x00 for _ in range(0, -1 * len(b) % l)]
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def padBytes(self, b, l):
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return b + bytes([0x00 for _ in range(0, -1 * len(b) % l)])
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