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