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Updated path requests

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This commit is contained in:
Mark Qvist 2020-03-06 14:28:26 +01:00
parent 33ce3ef48f
commit 67b13bca25
4 changed files with 18 additions and 11 deletions
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2
Examples/Echo.py
View File

@ -96,7 +96,7 @@ def client(destination_hexhash, configpath, timeout=None):
# We override the loglevel to provide feedback when
# an announce is received
RNS.loglevel = RNS.LOG_INFO
RNS.loglevel = RNS.LOG_DEBUG
# Tell the user that the client is ready!
RNS.log("Echo client ready, hit enter to send echo request to "+destination_hexhash+" (Ctrl-C to quit)")

9
RNS/Destination.py
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@ -198,7 +198,7 @@ class Destination:
# Creates an announce packet for this destination.
# Application specific data can be added to the announce.
def announce(self,app_data=None):
def announce(self, app_data=None, path_response=False):
destination_hash = self.hash
random_hash = RNS.Identity.getRandomHash()
@ -216,5 +216,10 @@ class Destination:
if app_data != None:
announce_data += app_data
RNS.Packet(self, announce_data, RNS.Packet.ANNOUNCE).send()
if path_response:
announce_context = RNS.Packet.PATH_RESPONSE
else:
announce_context = RNS.Packet.NONE
RNS.Packet(self, announce_data, RNS.Packet.ANNOUNCE, context = announce_context).send()

2
RNS/Identity.py
View File

@ -89,7 +89,7 @@ class Identity:
@staticmethod
def validateAnnounce(packet):
if packet.packet_type == RNS.Packet.ANNOUNCE:
RNS.log("Validating announce from "+RNS.prettyhexrep(packet.destination_hash), RNS.LOG_VERBOSE)
RNS.log("Validating announce from "+RNS.prettyhexrep(packet.destination_hash), RNS.LOG_DEBUG)
destination_hash = packet.destination_hash
public_key = packet.data[10:Identity.DERKEYSIZE/8+10]
random_hash = packet.data[Identity.DERKEYSIZE/8+10:Identity.DERKEYSIZE/8+20]

16
RNS/Transport.py
View File

@ -132,6 +132,8 @@ class Transport:
block_rebroadcasts = announce_entry[7]
announce_context = RNS.Packet.NONE
if block_rebroadcasts:
# TODO: Remove
RNS.log("Rebroadcasts blocked, setting context", RNS.LOG_DEBUG)
announce_context = RNS.Packet.PATH_RESPONSE
announce_data = packet.data
announce_identity = RNS.Identity.recall(packet.destination_hash)
@ -299,14 +301,14 @@ class Transport:
# expected path failed
RNS.log("Got packet in transport, but no known path to final destination. Dropping packet.", RNS.LOG_DEBUG)
else:
# TODO: Remove this log statement
RNS.log("Received packet in transport, but transport ID doesn't match, not transporting it further.", RNS.LOG_DEBUG)
pass
# Announce handling. Handles logic related to incoming
# announces, queueing rebroadcasts of these, and removal
# of queued announce rebroadcasts once handed to the next node
if packet.packet_type == RNS.Packet.ANNOUNCE:
if RNS.Identity.validateAnnounce(packet):
local_destination = next((d for d in Transport.destinations if d.hash == packet.destination_hash), None)
if local_destination == None and RNS.Identity.validateAnnounce(packet):
if packet.transport_id != None:
received_from = packet.transport_id
@ -387,11 +389,12 @@ class Transport:
block_rebroadcasts = False
random_blobs.append(random_blob)
retransmit_timeout = now + math.pow(Transport.PATHFINDER_C, packet.hops) + (RNS.rand() * Transport.PATHFINDER_RW)
if packet.context != RNS.Packet.PATH_RESPONSE:
Transport.announce_table[packet.destination_hash] = [now, retransmit_timeout, retries, received_from, packet.hops, packet, local_rebroadcasts, block_rebroadcasts]
Transport.destination_table[packet.destination_hash] = [now, received_from, packet.hops, expires, random_blobs, packet.receiving_interface, packet]
RNS.log("Path to "+RNS.prettyhexrep(packet.destination_hash)+" is now via "+RNS.prettyhexrep(received_from)+" on "+str(packet.receiving_interface), RNS.LOG_DEBUG)
RNS.log("Path to "+RNS.prettyhexrep(packet.destination_hash)+" is now "+str(packet.hops)+" hops away via "+RNS.prettyhexrep(received_from)+" on "+str(packet.receiving_interface), RNS.LOG_DEBUG)
elif packet.packet_type == RNS.Packet.LINKREQUEST:
for destination in Transport.destinations:
@ -573,7 +576,7 @@ class Transport:
local_destination = next((d for d in Transport.destinations if d.hash == destination_hash), None)
if local_destination != None:
RNS.log("Destination is local to this system, announcing", RNS.LOG_DEBUG)
local_destination.announce()
local_destination.announce(path_response=True)
elif destination_hash in Transport.destination_table:
RNS.log("Path found, inserting announce for transmission", RNS.LOG_DEBUG)
@ -584,14 +587,13 @@ class Transport:
# nodes, but requester will still see it and get a valid path
# TODO: Consider if there is a more elegant way to do this, or whether
# rebroadcasts should actually be allowed here
faux_hops = packet.hops
now = time.time()
retries = Transport.PATHFINDER_R
local_rebroadcasts = 0
block_rebroadcasts = True
retransmit_timeout = now + Transport.PATH_REQUEST_GRACE # + (RNS.rand() * Transport.PATHFINDER_RW)
Transport.announce_table[packet.destination_hash] = [now, retransmit_timeout, retries, received_from, faux_hops, packet, local_rebroadcasts, block_rebroadcasts]
Transport.announce_table[packet.destination_hash] = [now, retransmit_timeout, retries, received_from, packet.hops, packet, local_rebroadcasts, block_rebroadcasts]
else:
RNS.log("No known path to requested destination, ignoring request", RNS.LOG_DEBUG)