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Implemented tunnel saving/restoring.

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This commit is contained in:
Mark Qvist 2021-09-18 21:47:37 +02:00
parent 1351316f17
commit 711b754dcc
1 changed files with 105 additions and 2 deletions
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107
RNS/Transport.py
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@ -131,6 +131,8 @@ class Transport:
if RNS.Reticulum.transport_enabled():
destination_table_path = RNS.Reticulum.storagepath+"/destination_table"
tunnel_table_path = RNS.Reticulum.storagepath+"/tunnels"
if os.path.isfile(destination_table_path) and not Transport.owner.is_connected_to_shared_instance:
serialised_destinations = []
try:
@ -174,6 +176,56 @@ class Transport:
except Exception as e:
RNS.log("Could not load destination table from storage, the contained exception was: "+str(e), RNS.LOG_ERROR)
if os.path.isfile(tunnel_table_path) and not Transport.owner.is_connected_to_shared_instance:
serialised_tunnels = []
try:
file = open(tunnel_table_path, "rb")
serialised_tunnels = umsgpack.unpackb(file.read())
file.close()
for serialised_tunnel in serialised_tunnels:
tunnel_id = serialised_tunnel[0]
interface_hash = serialised_tunnel[1]
serialised_paths = serialised_tunnel[2]
expires = serialised_tunnel[3]
tunnel_paths = {}
for serialised_entry in serialised_paths:
destination_hash = serialised_entry[0]
timestamp = serialised_entry[1]
received_from = serialised_entry[2]
hops = serialised_entry[3]
expires = serialised_entry[4]
random_blobs = serialised_entry[5]
receiving_interface = Transport.find_interface_from_hash(serialised_entry[6])
announce_packet = Transport.get_cached_packet(serialised_entry[7])
if announce_packet != None:
announce_packet.unpack()
# We increase the hops, since reading a packet
# from cache is equivalent to receiving it again
# over an interface. It is cached with it's non-
# increased hop-count.
announce_packet.hops += 1
tunnel_path = [timestamp, received_from, hops, expires, random_blobs, receiving_interface, announce_packet]
tunnel_paths[destination_hash] = tunnel_path
tunnel = [tunnel_id, None, tunnel_paths, expires]
Transport.tunnels[tunnel_id] = tunnel
if len(Transport.destination_table) == 1:
specifier = "entry"
else:
specifier = "entries"
RNS.log("Loaded "+str(len(Transport.tunnels))+" tunnel table "+specifier+" from storage", RNS.LOG_VERBOSE)
except Exception as e:
RNS.log("Could not load tunnel table from storage, the contained exception was: "+str(e), RNS.LOG_ERROR)
RNS.log("Transport instance "+str(Transport.identity)+" started")
# Synthesize tunnels for any interfaces wanting it
@ -291,8 +343,7 @@ class Transport:
if time.time() > destination_entry[0] + Transport.DESTINATION_TIMEOUT:
stale_paths.append(destination_hash)
RNS.log("Path to "+RNS.prettyhexrep(destination_hash)+" timed out and was removed", RNS.LOG_DEBUG)
if not attached_interface in Transport.interfaces:
elif not attached_interface in Transport.interfaces:
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)
@ -1393,3 +1444,55 @@ class Transport:
RNS.log("Done saving "+str(len(serialised_destinations))+" path table entries to storage", RNS.LOG_VERBOSE)
except Exception as e:
RNS.log("Could not save path table to storage, the contained exception was: "+str(e), RNS.LOG_ERROR)
RNS.log("Saving tunnel table to storage...", RNS.LOG_VERBOSE)
try:
serialised_tunnels = []
for tunnel_id in Transport.tunnels:
te = Transport.tunnels[tunnel_id]
interface = te[1]
tunnel_paths = te[2]
expires = te[3]
if interface != None:
interface_hash = interface.get_hash()
else:
interface_hash = None
serialised_paths = []
for destination_hash in tunnel_paths:
de = tunnel_paths[destination_hash]
timestamp = de[0]
received_from = de[1]
hops = de[2]
expires = de[3]
random_blobs = de[4]
packet_hash = de[6].get_hash()
serialised_entry = [
destination_hash,
timestamp,
received_from,
hops,
expires,
random_blobs,
interface_hash,
packet_hash
]
serialised_paths.append(serialised_entry)
Transport.cache(de[6], force_cache=True)
serialised_tunnel = [tunnel_id, interface_hash, serialised_paths, expires]
serialised_tunnels.append(serialised_tunnel)
tunnels_path = RNS.Reticulum.storagepath+"/tunnels"
file = open(tunnels_path, "wb")
file.write(umsgpack.packb(serialised_tunnels))
file.close()
RNS.log("Done saving "+str(len(serialised_tunnels))+" tunnel table entries to storage", RNS.LOG_VERBOSE)
except Exception as e:
RNS.log("Could not save tunnel table to storage, the contained exception was: "+str(e), RNS.LOG_ERROR)