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Work on tunnels

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This commit is contained in:
Mark Qvist 2021-09-18 20:10:39 +02:00
parent 569f9bd2b1
commit d8f0380aa9
1 changed files with 28 additions and 3 deletions
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31
RNS/Transport.py
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@ -34,7 +34,7 @@ class Transport:
PATHFINDER_R = 1 # Retransmit retries PATHFINDER_R = 1 # Retransmit retries
PATHFINDER_T = 10 # Retry grace period PATHFINDER_T = 10 # Retry grace period
PATHFINDER_RW = 10 # Random window for announce rebroadcast PATHFINDER_RW = 10 # Random window for announce rebroadcast
PATHFINDER_E = 60*15 # Path expiration in seconds PATHFINDER_E = 25 # Path expiration in seconds
# TODO: Calculate an optimal number for this in # TODO: Calculate an optimal number for this in
# various situations # various situations
@ -296,6 +296,16 @@ class Transport:
stale_paths.append(destination_hash) stale_paths.append(destination_hash)
RNS.log("Path to "+RNS.prettyhexrep(destination_hash)+" was removed since the attached interface no longer exists", RNS.LOG_DEBUG) RNS.log("Path to "+RNS.prettyhexrep(destination_hash)+" was removed since the attached interface no longer exists", RNS.LOG_DEBUG)
# Cull the tunnel table
stale_tunnels = []
for tunnel_id in Transport.tunnels:
tunnel_entry = Transport.tunnels[tunnel_id]
expires = tunnel_entry[3]
if time.time() > expires:
stale_tunnels.append(tunnel_id)
RNS.log("Tunnel "+RNS.prettyhexrep(tunnel_id)+" timed out and was removed", RNS.LOG_DEBUG)
i = 0 i = 0
for link_id in stale_links: for link_id in stale_links:
Transport.link_table.pop(link_id) Transport.link_table.pop(link_id)
@ -318,6 +328,17 @@ class Transport:
else: else:
RNS.log("Removed "+str(i)+" paths", RNS.LOG_DEBUG) RNS.log("Removed "+str(i)+" paths", RNS.LOG_DEBUG)
i = 0
for tunnel_id in stale_tunnels:
Transport.tunnels.pop(tunnel_id)
i += 1
if i > 0:
if i == 1:
RNS.log("Removed "+str(i)+" tunnel", RNS.LOG_DEBUG)
else:
RNS.log("Removed "+str(i)+" tunnels", RNS.LOG_DEBUG)
Transport.tables_last_culled = time.time() Transport.tables_last_culled = time.time()
except Exception as e: except Exception as e:
@ -791,6 +812,8 @@ class Transport:
tunnel_entry = Transport.tunnels[packet.receiving_interface.tunnel_id] tunnel_entry = Transport.tunnels[packet.receiving_interface.tunnel_id]
paths = tunnel_entry[2] paths = tunnel_entry[2]
paths[packet.destination_hash] = destination_table_entry paths[packet.destination_hash] = destination_table_entry
expires = time.time() + Transport.PATHFINDER_E
tunnel_entry[3] = expires
RNS.log("Path to "+RNS.prettyhexrep(packet.destination_hash)+" associated with tunnel "+RNS.prettyhexrep(packet.receiving_interface.tunnel_id), RNS.LOG_VERBOSE) RNS.log("Path to "+RNS.prettyhexrep(packet.destination_hash)+" associated with tunnel "+RNS.prettyhexrep(packet.receiving_interface.tunnel_id), RNS.LOG_VERBOSE)
# Call externally registered callbacks from apps # Call externally registered callbacks from apps
@ -986,16 +1009,18 @@ class Transport:
@staticmethod @staticmethod
def handle_tunnel(tunnel_id, interface): def handle_tunnel(tunnel_id, interface):
expires = time.time() + Transport.PATHFINDER_E
if not tunnel_id in Transport.tunnels: if not tunnel_id in Transport.tunnels:
RNS.log("Tunnel endpoint "+RNS.prettyhexrep(tunnel_id)+" established.", RNS.LOG_DEBUG) RNS.log("Tunnel endpoint "+RNS.prettyhexrep(tunnel_id)+" established.", RNS.LOG_DEBUG)
paths = {} paths = {}
tunnel_entry = [tunnel_id, interface, paths] tunnel_entry = [tunnel_id, interface, paths, expires]
interface.tunnel_id = tunnel_id interface.tunnel_id = tunnel_id
Transport.tunnels[tunnel_id] = tunnel_entry Transport.tunnels[tunnel_id] = tunnel_entry
else: else:
RNS.log("Tunnel endpoint "+RNS.prettyhexrep(tunnel_id)+" reappeared. Restoring paths...", RNS.LOG_DEBUG) RNS.log("Tunnel endpoint "+RNS.prettyhexrep(tunnel_id)+" reappeared. Restoring paths...", RNS.LOG_DEBUG)
tunnel_entry = Transport.tunnels[tunnel_id] tunnel_entry = Transport.tunnels[tunnel_id]
tunnel_entry[1] = interface tunnel_entry[1] = interface
tunnel_entry[3] = expires
interface.tunnel_id = tunnel_id interface.tunnel_id = tunnel_id
paths = tunnel_entry[2] paths = tunnel_entry[2]
@ -1022,7 +1047,7 @@ class Transport:
if should_add: if should_add:
Transport.destination_table[destination_hash] = new_entry Transport.destination_table[destination_hash] = new_entry
RNS.log("Restored path to "+RNS.prettyhexrep(packet.destination_hash)+" is now "+str(announce_hops)+" hops away via "+RNS.prettyhexrep(received_from)+" on "+str(packet.receiving_interface), RNS.LOG_VERBOSE) RNS.log("Restored path to "+RNS.prettyhexrep(packet.destination_hash)+" is now "+str(announce_hops)+" hops away via "+RNS.prettyhexrep(received_from)+" on "+str(receiving_interface), RNS.LOG_VERBOSE)