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https://github.com/markqvist/Reticulum.git
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Work on announce routing
This commit is contained in:
Mark Qvist
parent
fe1642664c
commit
6cdbab7e31
@ -208,7 +208,11 @@ class Destination:
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signature = self.identity.sign(signed_data)
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# TODO: Check if this could be optimised by only
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# carrying the hash in the destination field, not
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# also redundantly inside the signed blob as here
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announce_data = self.hash+self.identity.getPublicKey()+random_hash+signature
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if app_data != None:
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announce_data += app_data
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@ -62,7 +62,6 @@ class Packet:
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self.transport_id = transport_id
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self.data = data
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self.flags = self.getPackedFlags()
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self.MTU = RNS.Reticulum.MTU
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self.raw = None
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self.packed = False
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@ -74,6 +73,7 @@ class Packet:
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self.packed = True
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self.fromPacked = True
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self.MTU = RNS.Reticulum.MTU
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self.sent_at = None
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self.packet_hash = None
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@ -120,8 +120,13 @@ class Packet:
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self.ciphertext = self.destination.encrypt(self.data)
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if self.header_type == Packet.HEADER_2:
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if t_destination != None:
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self.header += self.t_destination
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if self.transport_id != None:
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self.header += self.transport_id
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self.header += self.destination.hash
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if self.packet_type == Packet.ANNOUNCE:
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# Announce packets are not encrypted
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self.ciphertext = self.data
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else:
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raise IOError("Packet with header type 2 must have a transport ID")
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@ -1,6 +1,7 @@
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import os
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import RNS
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import time
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import math
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import threading
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import traceback
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from time import sleep
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@ -14,6 +15,15 @@ class Transport:
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TUNNEL = 0x03;
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types = [BROADCAST, TRANSPORT, RELAY, TUNNEL]
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REACHABILITY_UNREACHABLE = 0x00
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REACHABILITY_DIRECT = 0x01
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REACHABILITY_TRANSPORT = 0x02
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PATHFINDER_M = 18 # Max hops
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PATHFINDER_C = 2.0 # Decay constant
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PATHFINDER_R = 2 # Retransmit retries
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PATHFINDER_T = 10 # Retry grace period
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interfaces = [] # All active interfaces
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destinations = [] # All active destinations
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pending_links = [] # Links that are being established
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@ -21,11 +31,16 @@ class Transport:
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packet_hashlist = [] # A list of packet hashes for duplicate detection
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receipts = [] # Receipts of all outgoing packets for proof processing
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announce_table = {}
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destination_table = {}
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jobs_locked = False
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jobs_running = False
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job_interval = 0.250
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receipts_last_checked = 0.0
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receipts_check_interval = 1.0
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announces_last_checked = 0.0
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announces_check_interval = 1.0
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hashlist_maxsize = 1000000
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identity = None
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@ -68,11 +83,12 @@ class Transport:
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@staticmethod
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def jobs():
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outgoing = []
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Transport.jobs_running = True
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try:
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if not Transport.jobs_locked:
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# Process receipts list for timed-out packets
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if Transport.receipts_last_checked+Transport.receipts_check_interval < time.time():
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if time.time() > Transport.receipts_last_checked+Transport.receipts_check_interval:
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for receipt in Transport.receipts:
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thread = threading.Thread(target=receipt.check_timeout)
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thread.setDaemon(True)
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@ -82,6 +98,37 @@ class Transport:
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Transport.receipts_last_checked = time.time()
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# Process announces needing retransmission
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if time.time() > Transport.announces_last_checked+Transport.announces_check_interval:
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for destination_hash in Transport.announce_table:
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announce_entry = Transport.announce_table[destination_hash]
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# TODO: remove comment and log output
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# [time_heard, retransmit_timeout, retries, received_from, packet.hops, packet]
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# RNS.log("Announce entry retries: "+str(announce_entry[2]), RNS.LOG_INFO)
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# RNS.log("Max retries: "+str(Transport.PATHFINDER_R), RNS.LOG_INFO)
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if announce_entry[2] > Transport.PATHFINDER_R:
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# RNS.log("Removing due to exceeded retries", RNS.LOG_INFO)
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Transport.announce_table.pop(destination_hash)
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break
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else:
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if time.time() > announce_entry[1]:
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# RNS.log("Rebroadcasting announce", RNS.LOG_INFO)
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announce_entry[1] = time.time() + math.pow(Transport.PATHFINDER_C, announce_entry[4]) + Transport.PATHFINDER_T
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announce_entry[2] += 1
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packet = announce_entry[5]
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announce_data = packet.data
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announce_identity = RNS.Identity.recall(packet.destination_hash)
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announce_destination = RNS.Destination(announce_identity, RNS.Destination.OUT, RNS.Destination.SINGLE, "unknown", "unknown");
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announce_destination.hash = packet.destination_hash
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announce_destination.hexhash = announce_destination.hash.encode("hex_codec")
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new_packet = RNS.Packet(announce_destination, announce_data, RNS.Packet.ANNOUNCE, header_type = RNS.Packet.HEADER_2, transport_type = Transport.TRANSPORT, transport_id = Transport.identity.hash)
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new_packet.hops = announce_entry[4]
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RNS.log("Rebroadcasting announce for "+RNS.prettyhexrep(announce_destination.hash)+" with hop count "+str(new_packet.hops), RNS.LOG_INFO)
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outgoing.append(new_packet)
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Transport.announces_last_checked = time.time()
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# Cull the packet hashlist if it has reached max size
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while (len(Transport.packet_hashlist) > Transport.hashlist_maxsize):
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Transport.packet_hashlist.pop(0)
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@ -93,6 +140,9 @@ class Transport:
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Transport.jobs_running = False
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for packet in outgoing:
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packet.send()
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@staticmethod
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def outbound(packet):
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while (Transport.jobs_running):
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@ -165,7 +215,33 @@ class Transport:
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if packet.packet_type == RNS.Packet.ANNOUNCE:
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if RNS.Identity.validateAnnounce(packet):
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Transport.cache(packet)
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if (packet.transport_id != None):
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received_from = packet.transport_id
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# Check if this is a next retransmission from
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# another node. If it is, we're removing the
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# announcein question from our pending table
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if packet.destination_hash in Transport.announce_table:
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announce_entry = Transport.announce_table[packet.destination_hash]
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if packet.hops == announce_entry[4]+1 and announce_entry[2] > 0:
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now = time.time()
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if now < announce_entry[2]:
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# TODO: Remove
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RNS.log("Another node retransmitted our transported announce for "+RNS.prettyhexrep(packet.destination_hash)+", removing it from pending table", RNS.LOG_DEBUG)
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Transport.announce_table.pop(announce_entry)
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else:
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received_from = packet.destination_hash
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# If the announce has not reached the retransmission
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# limit, insert it into our pending table
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packet.hops += 1
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if (packet.hops < Transport.PATHFINDER_M+1):
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now = time.time()
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retransmit_timeout = now + math.pow(Transport.PATHFINDER_C, packet.hops)
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retries = 0
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Transport.announce_table[packet.destination_hash] = [now, retransmit_timeout, retries, received_from, packet.hops, packet]
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Transport.destination_table[packet.destination_hash] = [now, received_from, packet.hops]
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elif packet.packet_type == RNS.Packet.LINKREQUEST:
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for destination in Transport.destinations:
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@ -288,6 +364,8 @@ class Transport:
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def cache_request_packet(packet):
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if len(packet.data) == RNS.Identity.HASHLENGTH/8:
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packet_hash = RNS.hexrep(packet.data, delimit=False)
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# TODO: There's some pretty obvious file access
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# issues here. Make sure this can't happen
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path = RNS.Reticulum.cachepath+"/"+packet_hash
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if os.path.isfile(path):
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file = open(path, "r")
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