build valid packets (hopefully)
This commit is contained in:
Jakob Ketterl
@@ -3,6 +3,8 @@ import threading
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import time
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import random
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from sched import scheduler
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from owrx.config import PropertyManager
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from owrx.version import openwebrx_version
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logger = logging.getLogger(__name__)
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@@ -10,7 +12,8 @@ logger = logging.getLogger(__name__)
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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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interval = 60
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supportedModes = ["FT8", "FT4", "JT9", "JT65"]
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@staticmethod
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def getSharedInstance():
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@@ -22,6 +25,7 @@ class PskReporter(object):
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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.scheduler = scheduler(time.time, time.sleep)
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self.scheduleNextUpload()
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threading.Thread(target=self.scheduler.run).start()
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@@ -32,6 +36,8 @@ class PskReporter(object):
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self.scheduler.enter(delay, 1, self.upload)
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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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self.spots.append(spot)
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@@ -41,6 +47,131 @@ class PskReporter(object):
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self.spots = []
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if spots:
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logger.debug("would now upload %i spots", len(spots))
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self.uploader.upload(spots)
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self.scheduleNextUpload()
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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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def upload(self, spots):
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logger.debug("would now upload %i spots", len(spots))
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for packet in self.getPackets(spots):
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l = int.from_bytes(packet[2:4], "big")
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logger.debug("packet length: %i; indicated length: %i", len(packet), l)
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logger.debug(packet)
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# TODO actually send the packet
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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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sInfoLength = sum(map(len, chunk))
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length = sInfoLength + 16 + len(rHeader) + len(sHeader) + len(rInfo) + 4
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header = self.getHeader(length)
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packets.append(
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header
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+ rHeader
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+ sHeader
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+ rInfo
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+ bytes(Uploader.senderDelimiter)
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+ sInfoLength.to_bytes(2, "big")
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+ b"".join(chunk)
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)
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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(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 = PropertyManager.getSharedInstance()
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callsign = pm["pskreporter_callsign"]
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locator = pm["receiver_qra"]
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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, 0x05, 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 pad(self, bytes, l):
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return bytes + [0x00 for _ in range(0, -1 * len(bytes) % l)]
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10
owrx/wsjt.py
10
owrx/wsjt.py
@@ -282,7 +282,7 @@ class WsjtParser(object):
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decoder = Jt9Decoder()
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else:
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decoder = WsprDecoder()
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out = decoder.parse(msg)
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out = decoder.parse(msg, self.dial_freq)
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if "mode" in out:
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self.pushDecode(out["mode"])
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if "callsign" in out and "locator" in out:
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@@ -328,7 +328,7 @@ class Decoder(object):
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class Jt9Decoder(Decoder):
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locator_pattern = re.compile("[A-Z0-9]+\\s([A-Z0-9]+)\\s([A-R]{2}[0-9]{2})$")
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def parse(self, msg):
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def parse(self, msg, dial_freq):
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# ft8 sample
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# '222100 -15 -0.0 508 ~ CQ EA7MJ IM66'
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# jt65 sample
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@@ -349,7 +349,7 @@ class Jt9Decoder(Decoder):
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"timestamp": timestamp,
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"db": float(msg[0:3]),
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"dt": float(msg[4:8]),
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"freq": int(msg[9:13]),
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"freq": dial_freq + int(msg[9:13]),
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"mode": mode,
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"msg": wsjt_msg,
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}
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@@ -370,7 +370,7 @@ class Jt9Decoder(Decoder):
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class WsprDecoder(Decoder):
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wspr_splitter_pattern = re.compile("([A-Z0-9]*)\\s([A-R]{2}[0-9]{2})\\s([0-9]+)")
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def parse(self, msg):
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def parse(self, msg, dial_freq):
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# wspr sample
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# '2600 -24 0.4 0.001492 -1 G8AXA JO01 33'
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# '0052 -29 2.6 0.001486 0 G02CWT IO92 23'
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@@ -379,7 +379,7 @@ class WsprDecoder(Decoder):
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"timestamp": self.parse_timestamp(msg[0:4], "%H%M"),
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"db": float(msg[5:8]),
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"dt": float(msg[9:13]),
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"freq": float(msg[14:24]),
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"freq": dial_freq + int(float(msg[14:24]) * 1e6),
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"drift": int(msg[25:28]),
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"mode": "WSPR",
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"msg": wsjt_msg,
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