mirror of
https://github.com/markqvist/LXMF.git
synced 2024-10-01 01:35:36 -04:00
Implemented ticket exchanges. Implemented stamp generation and validation by tickets.
This commit is contained in:
Mark Qvist
parent
74cbd11473
commit
62f5a9eead
@ -9,6 +9,7 @@ import RNS
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import RNS.vendor.umsgpack as msgpack
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from .LXMF import APP_NAME
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from .LXMF import FIELD_TICKET
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from .LXMPeer import LXMPeer
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from .LXMessage import LXMessage
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@ -105,8 +106,10 @@ class LXMRouter:
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self.locally_delivered_transient_ids = {}
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self.locally_processed_transient_ids = {}
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self.outbound_stamp_costs = {}
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self.available_tickets = {"outbound": {}, "inbound": {}, "last_deliveries": {}}
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self.cost_file_lock = threading.Lock()
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self.ticket_file_lock = threading.Lock()
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if identity == None:
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identity = RNS.Identity()
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@ -164,6 +167,31 @@ class LXMRouter:
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except Exception as e:
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RNS.log("Could not load outbound stamp costs from storage. The contained exception was: "+str(e), RNS.LOG_ERROR)
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try:
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if os.path.isfile(self.storagepath+"/available_tickets"):
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with self.ticket_file_lock:
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with open(self.storagepath+"/available_tickets", "rb") as available_tickets_file:
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data = available_tickets_file.read()
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self.available_tickets = msgpack.unpackb(data)
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if not type(self.available_tickets) == dict:
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RNS.log("Invalid data format for loaded available tickets, recreating...", RNS.LOG_ERROR)
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self.available_tickets = {"outbound": {}, "inbound": {}, "last_deliveries": {}}
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if not "outbound" in self.available_tickets:
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RNS.log("Missing outbound entry in loaded available tickets, recreating...", RNS.LOG_ERROR)
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self.available_tickets["outbound"] = {}
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if not "inbound" in self.available_tickets:
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RNS.log("Missing inbound entry in loaded available tickets, recreating...", RNS.LOG_ERROR)
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self.available_tickets["inbound"] = {}
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if not "last_deliveries" in self.available_tickets:
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RNS.log("Missing local_deliveries entry in loaded available tickets, recreating...", RNS.LOG_ERROR)
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self.available_tickets["last_deliveries"] = {}
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self.clean_available_tickets()
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self.save_available_tickets()
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except Exception as e:
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RNS.log("Could not load outbound stamp costs from storage. The contained exception was: "+str(e), RNS.LOG_ERROR)
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atexit.register(self.exit_handler)
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job_thread = threading.Thread(target=self.jobloop)
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@ -191,6 +219,10 @@ class LXMRouter:
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da_thread.start()
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def register_delivery_identity(self, identity, display_name = None, stamp_cost = None):
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if len(self.delivery_destinations) != 0:
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RNS.log("Currently only one delivery identity is supported per LXMF router instance", RNS.LOG_ERROR)
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return None
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if not os.path.isdir(self.ratchetpath):
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os.makedirs(self.ratchetpath)
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@ -647,6 +679,61 @@ class LXMRouter:
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return weight
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def generate_ticket(self, destination_hash, expiry=LXMessage.TICKET_EXPIRY):
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now = time.time()
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ticket = None
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if destination_hash in self.available_tickets["last_deliveries"]:
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last_delivery = self.available_tickets["last_deliveries"][destination_hash]
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elapsed = now - last_delivery
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if elapsed < LXMessage.TICKET_INTERVAL:
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RNS.log(f"A ticket for {RNS.prettyhexrep(destination_hash)} was already delivered {RNS.prettytime(elapsed)} ago, not including another ticket yet", RNS.LOG_DEBUG)
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return None
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if destination_hash in self.available_tickets["inbound"]:
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for ticket in self.available_tickets["inbound"][destination_hash]:
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ticket_entry = self.available_tickets["inbound"][destination_hash][ticket]
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expires = ticket_entry[0]; validity_left = expires - now
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if validity_left > LXMessage.TICKET_RENEW:
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RNS.log(f"Found generated ticket for {RNS.prettyhexrep(destination_hash)} with {RNS.prettytime(validity_left)} of validity left, re-using this one", RNS.LOG_DEBUG)
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return [expires, ticket]
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else:
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self.available_tickets["inbound"][destination_hash] = {}
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RNS.log(f"No generated tickets for {RNS.prettyhexrep(destination_hash)} with enough validity found, generating a new one", RNS.LOG_DEBUG)
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expires = now+expiry
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ticket = os.urandom(LXMessage.TICKET_LENGTH)
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self.available_tickets["inbound"][destination_hash][ticket] = [expires]
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self.save_available_tickets()
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return [expires, ticket]
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def remember_ticket(self, destination_hash, ticket_entry):
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expires = ticket_entry[0]-time.time()
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RNS.log(f"Remembering ticket for {RNS.prettyhexrep(destination_hash)}, expires in {RNS.prettytime(expires)}", RNS.LOG_DEBUG)
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self.available_tickets["outbound"][destination_hash] = [ticket_entry[0], ticket_entry[1]]
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def get_outbound_ticket(self, destination_hash):
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if destination_hash in self.available_tickets["outbound"]:
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entry = self.available_tickets["outbound"][destination_hash]
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if entry[0] > time.time():
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return entry[1]
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return None
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def get_inbound_tickets(self, destination_hash):
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now = time.time()
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available_tickets = []
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if destination_hash in self.available_tickets["inbound"]:
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for inbound_ticket in self.available_tickets["inbound"][destination_hash]:
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if now < self.available_tickets["inbound"][destination_hash][inbound_ticket][0]:
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available_tickets.append(inbound_ticket)
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if len(available_tickets) == 0:
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return None
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else:
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return available_tickets
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def get_size(self, transient_id):
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lxm_size = self.propagation_entries[transient_id][3]
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return lxm_size
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@ -778,13 +865,57 @@ class LXMRouter:
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if not os.path.isdir(self.storagepath):
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os.makedirs(self.storagepath)
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locally_processed_file = open(self.storagepath+"/outbound_stamp_costs", "wb")
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locally_processed_file.write(msgpack.packb(self.outbound_stamp_costs))
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locally_processed_file.close()
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outbound_stamp_costs_file = open(self.storagepath+"/outbound_stamp_costs", "wb")
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outbound_stamp_costs_file.write(msgpack.packb(self.outbound_stamp_costs))
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outbound_stamp_costs_file.close()
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except Exception as e:
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RNS.log("Could not save locally processed message ID cache to storage. The contained exception was: "+str(e), RNS.LOG_ERROR)
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def clean_available_tickets(self):
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try:
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# Clean outbound tickets
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expired_outbound = []
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for destination_hash in self.available_tickets["outbound"]:
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entry = self.available_tickets["outbound"][destination_hash]
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if time.time() > entry[0]:
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expired_outbound.append(destination_hash)
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for destination_hash in expired_outbound:
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RNS.log(f"Cleaning expired outbound ticket for {destination_hash}") # TODO: Remove
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self.available_tickets["outbound"].pop(destination_hash)
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# Clean inbound tickets
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for destination_hash in self.available_tickets["inbound"]:
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expired_inbound = []
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for inbound_ticket in self.available_tickets["inbound"][destination_hash]:
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entry = self.available_tickets["inbound"][destination_hash][inbound_ticket]
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ticket_expiry = entry[0]
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if time.time() > ticket_expiry+LXMessage.TICKET_GRACE:
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expired_inbound.append(inbound_ticket)
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for inbound_ticket in expired_inbound:
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RNS.log(f"Cleaning expired inbound ticket for {destination_hash}") # TODO: Remove
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self.available_tickets["inbound"][destination_hash].pop(destination_hash)
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except Exception as e:
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RNS.log(f"Error while cleaning outbound stamp costs. The contained exception was: {e}", RNS.LOG_ERROR)
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RNS.trace_exception(e)
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def save_available_tickets(self):
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with self.ticket_file_lock:
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try:
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RNS.log("Saving available tickets...", RNS.LOG_DEBUG) # TODO: Remove
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if not os.path.isdir(self.storagepath):
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os.makedirs(self.storagepath)
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available_tickets_file = open(self.storagepath+"/available_tickets", "wb")
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available_tickets_file.write(msgpack.packb(self.available_tickets))
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available_tickets_file.close()
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except Exception as e:
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RNS.log("Could not save available tickets to storage. The contained exception was: "+str(e), RNS.LOG_ERROR)
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def exit_handler(self):
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if self.propagation_node:
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try:
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@ -1026,14 +1157,29 @@ class LXMRouter:
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return False
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def handle_outbound(self, lxmessage):
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destination_hash = lxmessage.get_destination().hash
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if lxmessage.stamp_cost == None:
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destination_hash = lxmessage.get_destination().hash
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if destination_hash in self.outbound_stamp_costs:
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stamp_cost = self.outbound_stamp_costs[destination_hash][1]
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lxmessage.stamp_cost = stamp_cost
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RNS.log(f"No stamp cost set on LXM to {RNS.prettyhexrep(destination_hash)}, autoconfigured to {stamp_cost}, as required by latest announce", RNS.LOG_DEBUG)
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lxmessage.state = LXMessage.OUTBOUND
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# If an outbound ticket is available for this
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# destination, attach it to the message.
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lxmessage.outbound_ticket = self.get_outbound_ticket(destination_hash)
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if lxmessage.outbound_ticket != None and lxmessage.defer_stamp:
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RNS.log(f"Deferred stamp generation was requested for {lxmessage}, but outbound ticket was applied, processing immediately", RNS.LOG_DEBUG)
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lxmessage.defer_stamp = False
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# If requested, include a ticket to allow the
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# destination to reply without generating a stamp.
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if lxmessage.include_ticket:
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ticket = self.generate_ticket(lxmessage.destination_hash)
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if ticket:
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lxmessage.fields[FIELD_TICKET] = ticket
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if not lxmessage.packed:
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lxmessage.pack()
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@ -1073,9 +1219,23 @@ class LXMRouter:
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try:
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message = LXMessage.unpack_from_bytes(lxmf_data)
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if message.signature_validated and FIELD_TICKET in message.fields:
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ticket_entry = message.fields[FIELD_TICKET]
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if type(ticket_entry) == list and len(ticket_entry) > 1:
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expires = ticket_entry[0]
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ticket = ticket_entry[1]
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if time.time() < expires:
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if type(ticket) == bytes and len(ticket) == LXMessage.TICKET_LENGTH:
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self.remember_ticket(message.source_hash, ticket_entry)
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def save_job():
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self.save_available_tickets()
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threading.Thread(target=save_job, daemon=True).start()
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required_stamp_cost = self.delivery_destinations[message.destination_hash].stamp_cost
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if required_stamp_cost != None:
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if message.validate_stamp(required_stamp_cost):
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destination_tickets = self.get_inbound_tickets(message.source_hash)
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if message.validate_stamp(required_stamp_cost, tickets=destination_tickets):
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message.stamp_valid = True
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else:
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message.stamp_valid = False
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@ -1471,6 +1631,11 @@ class LXMRouter:
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if lxmessage.state == LXMessage.DELIVERED:
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RNS.log("Delivery has occurred for "+str(lxmessage)+", removing from outbound queue", RNS.LOG_DEBUG)
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self.pending_outbound.remove(lxmessage)
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if lxmessage.include_ticket and FIELD_TICKET in lxmessage.fields:
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RNS.log(f"Updating latest ticket delivery for {RNS.prettyhexrep(lxmessage.destination_hash)}", RNS.LOG_DEBUG)
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self.available_tickets["last_deliveries"][lxmessage.destination_hash] = time.time()
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self.save_available_tickets()
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elif lxmessage.method == LXMessage.PROPAGATED and lxmessage.state == LXMessage.SENT:
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RNS.log("Propagation has occurred for "+str(lxmessage)+", removing from outbound queue", RNS.LOG_DEBUG)
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self.pending_outbound.remove(lxmessage)
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@ -35,6 +35,17 @@ class LXMessage:
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DESTINATION_LENGTH = RNS.Identity.TRUNCATED_HASHLENGTH//8
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SIGNATURE_LENGTH = RNS.Identity.SIGLENGTH//8
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TICKET_LENGTH = RNS.Identity.TRUNCATED_HASHLENGTH//8
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# Default ticket expiry is 3 weeks, with an
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# additional grace period of 5 days, allowing
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# for timekeeping inaccuracies. Tickets will
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# automatically renew when there is less than
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# 14 days to expiry.
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TICKET_EXPIRY = 21*24*60*60
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TICKET_GRACE = 5*24*60*60
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TICKET_RENEW = 14*24*60*60
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TICKET_INTERVAL = 3*24*60*60
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# LXMF overhead is 111 bytes per message:
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# 16 bytes for destination hash
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@ -93,8 +104,7 @@ class LXMessage:
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else:
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return "<LXMessage>"
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def __init__(self, destination, source, content = "", title = "", fields = None, desired_method = None,
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destination_hash = None, source_hash = None, stamp_cost=None):
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def __init__(self, destination, source, content = "", title = "", fields = None, desired_method = None, destination_hash = None, source_hash = None, stamp_cost=None, include_ticket=False):
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if isinstance(destination, RNS.Destination) or destination == None:
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self.__destination = destination
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@ -114,25 +124,31 @@ class LXMessage:
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else:
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raise ValueError("LXMessage initialised with invalid source")
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if title == None:
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title = ""
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self.set_title_from_string(title)
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self.set_content_from_string(content)
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self.set_fields(fields)
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self.payload = None
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self.timestamp = None
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self.signature = None
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self.hash = None
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self.packed = None
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self.stamp = None
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self.stamp_cost = stamp_cost
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self.stamp_valid = False
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self.defer_stamp = False
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self.state = LXMessage.GENERATING
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self.method = LXMessage.UNKNOWN
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self.progress = 0.0
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self.rssi = None
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self.snr = None
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self.q = None
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self.payload = None
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self.timestamp = None
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self.signature = None
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self.hash = None
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self.packed = None
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self.state = LXMessage.GENERATING
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self.method = LXMessage.UNKNOWN
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self.progress = 0.0
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self.rssi = None
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self.snr = None
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self.q = None
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self.stamp = None
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self.stamp_cost = stamp_cost
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self.stamp_valid = False
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self.defer_stamp = False
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self.outbound_ticket = None
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self.include_ticket = include_ticket
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self.propagation_packed = None
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self.paper_packed = None
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@ -254,7 +270,13 @@ class LXMessage:
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else:
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return True
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def validate_stamp(self, target_cost):
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def validate_stamp(self, target_cost, tickets=None):
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if tickets != None:
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for ticket in tickets:
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if self.stamp == RNS.Identity.truncated_hash(ticket+self.message_id):
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RNS.log(f"Stamp on {self} validated by inbound ticket", RNS.LOG_DEBUG) # TODO: Remove at some point
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return True
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if self.stamp == None:
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return False
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else:
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@ -264,14 +286,25 @@ class LXMessage:
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return False
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def get_stamp(self, timeout=None):
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if self.stamp_cost == None:
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# If an outbound ticket exists, use this for
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# generating a valid stamp.
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if self.outbound_ticket != None and type(self.outbound_ticket) == bytes and len(self.outbound_ticket) == LXMessage.TICKET_LENGTH:
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RNS.log(f"Generating stamp with outbound ticket for {self}", RNS.LOG_DEBUG) # TODO: Remove at some point
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return RNS.Identity.truncated_hash(self.outbound_ticket+self.message_id)
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# If no stamp cost is required, we can just
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# return immediately.
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elif self.stamp_cost == None:
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return None
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# If a stamp was already generated, return
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# it immediately.
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elif self.stamp != None:
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# TODO: Check that message hash cannot actually
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# change under any circumstances before handoff
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return self.stamp
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# Otherwise, we will need to generate a
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# valid stamp according to the cost that
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# the receiver has specified.
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else:
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RNS.log(f"Generating stamp with cost {self.stamp_cost} for {self}...", RNS.LOG_DEBUG)
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workblock = LXMessage.stamp_workblock(self.message_id)
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@ -279,6 +312,7 @@ class LXMessage:
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total_rounds = 0
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if not RNS.vendor.platformutils.is_android():
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RNS.log("Preparing IPC semaphores", RNS.LOG_DEBUG) # TODO: Remove
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stop_event = multiprocessing.Event()
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result_queue = multiprocessing.Queue(maxsize=1)
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rounds_queue = multiprocessing.Queue()
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@ -305,14 +339,17 @@ class LXMessage:
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job_procs = []
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jobs = multiprocessing.cpu_count()
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RNS.log("Starting workers", RNS.LOG_DEBUG) # TODO: Remove
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for _ in range(jobs):
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process = multiprocessing.Process(target=job, kwargs={"stop_event": stop_event},)
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job_procs.append(process)
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process.start()
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RNS.log("Awaiting results on queue", RNS.LOG_DEBUG) # TODO: Remove
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stamp = result_queue.get()
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stop_event.set()
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RNS.log("Joining worker processes", RNS.LOG_DEBUG) # TODO: Remove
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for j in range(jobs):
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process = job_procs[j]
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process.join()
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@ -354,21 +391,21 @@ class LXMessage:
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wm = multiprocessing.Manager()
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jobs = multiprocessing.cpu_count()
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RNS.log(f"Dispatching {jobs} workers for stamp generation...") # TODO: Remove
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# RNS.log(f"Dispatching {jobs} workers for stamp generation...") # TODO: Remove
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results_dict = wm.dict()
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||||
while stamp == None:
|
||||
job_procs = []
|
||||
|
||||
def job(procnum=None, results_dict=None, wb=None):
|
||||
RNS.log(f"Worker {procnum} starting...") # TODO: Remove
|
||||
# RNS.log(f"Worker {procnum} starting...") # TODO: Remove
|
||||
rounds = 0
|
||||
|
||||
stamp = os.urandom(256//8)
|
||||
while not sv(stamp, self.stamp_cost, wb):
|
||||
if rounds >= 500:
|
||||
stamp = None
|
||||
RNS.log(f"Worker {procnum} found no result in {rounds} rounds") # TODO: Remove
|
||||
# RNS.log(f"Worker {procnum} found no result in {rounds} rounds") # TODO: Remove
|
||||
break
|
||||
|
||||
stamp = os.urandom(256//8)
|
||||
@ -386,17 +423,24 @@ class LXMessage:
|
||||
|
||||
for j in results_dict:
|
||||
r = results_dict[j]
|
||||
RNS.log(f"Result from {r}: {r[1]} rounds, stamp: {r[0]}") # TODO: Remove
|
||||
# RNS.log(f"Result from {r}: {r[1]} rounds, stamp: {r[0]}") # TODO: Remove
|
||||
total_rounds += r[1]
|
||||
if r[0] != None:
|
||||
stamp = r[0]
|
||||
RNS.log(f"Found stamp: {stamp}") # TODO: Remove
|
||||
# RNS.log(f"Found stamp: {stamp}") # TODO: Remove
|
||||
|
||||
if stamp == None:
|
||||
elapsed = time.time() - start_time
|
||||
speed = total_rounds/elapsed
|
||||
RNS.log(f"Stamp generation for {self} running. {total_rounds} rounds completed so far, {int(speed)} rounds per second", RNS.LOG_DEBUG)
|
||||
|
||||
duration = time.time() - start_time
|
||||
rounds = total_rounds
|
||||
|
||||
speed = total_rounds/duration
|
||||
|
||||
# TODO: Remove stats output
|
||||
RNS.log(f"Stamp generated in {RNS.prettytime(duration)} / {rounds} rounds", RNS.LOG_DEBUG)
|
||||
RNS.log(f"Stamp generated in {RNS.prettytime(duration)}, {rounds} rounds, {int(speed)} rounds per second", RNS.LOG_DEBUG)
|
||||
# RNS.log(f"Rounds per second {int(rounds/duration)}", RNS.LOG_DEBUG)
|
||||
# RNS.log(f"Stamp: {RNS.hexrep(stamp)}", RNS.LOG_DEBUG)
|
||||
# RNS.log(f"Resulting hash: {RNS.hexrep(RNS.Identity.full_hash(workblock+stamp))}", RNS.LOG_DEBUG)
|
||||
|
||||
@ -6,6 +6,7 @@ required_stamp_cost = 8
|
||||
enforce_stamps = False
|
||||
|
||||
def delivery_callback(message):
|
||||
global my_lxmf_destination, router
|
||||
time_string = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(message.timestamp))
|
||||
signature_string = "Signature is invalid, reason undetermined"
|
||||
if message.signature_validated:
|
||||
@ -35,6 +36,12 @@ def delivery_callback(message):
|
||||
RNS.log("\t| Stamp : "+stamp_string)
|
||||
RNS.log("\t+---------------------------------------------------------------")
|
||||
|
||||
# Optionally, send a reply
|
||||
# source = my_lxmf_destination
|
||||
# dest = message.source
|
||||
# lxm = LXMF.LXMessage(dest, source, "Reply", None, desired_method=LXMF.LXMessage.DIRECT, include_ticket=True)
|
||||
# router.handle_outbound(lxm)
|
||||
|
||||
r = RNS.Reticulum()
|
||||
|
||||
router = LXMF.LXMRouter(storagepath="./tmp1", enforce_stamps=enforce_stamps)
|
||||
|
||||
@ -14,7 +14,7 @@ r = RNS.Reticulum()
|
||||
router = LXMF.LXMRouter(storagepath="./tmp2")
|
||||
router.register_delivery_callback(delivery_callback)
|
||||
ident = RNS.Identity()
|
||||
source = router.register_delivery_identity(ident, display_name=random_names[random.randint(0,len(random_names)-1)])
|
||||
source = router.register_delivery_identity(ident, display_name=random_names[random.randint(0,len(random_names)-1)], stamp_cost=8)
|
||||
router.announce(source.hash)
|
||||
RNS.log("Source announced")
|
||||
|
||||
@ -42,14 +42,14 @@ while True:
|
||||
|
||||
lxm = LXMF.LXMessage(dest, source, random_msgs[random.randint(0,len(random_msgs)-1)],
|
||||
random_titles[random.randint(0,len(random_titles)-1)],
|
||||
desired_method=LXMF.LXMessage.DIRECT)
|
||||
desired_method=LXMF.LXMessage.DIRECT, include_ticket=True)
|
||||
|
||||
# Or, create an oppertunistic, single-packet message
|
||||
# for sending without first establishing a link:
|
||||
|
||||
# lxm = LXMF.LXMessage(dest, source, "This is a test",
|
||||
# random_titles[random.randint(0,len(random_titles)-1)],
|
||||
# desired_method=LXMF.LXMessage.OPPORTUNISTIC)
|
||||
# desired_method=LXMF.LXMessage.OPPORTUNISTIC, include_ticket=True)
|
||||
|
||||
|
||||
# Or, try sending the message via a propagation node:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user