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Updated filtering rules. Fixes #18.

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This commit is contained in:
Mark Qvist 2022-03-15 14:55:47 +01:00
parent 550dfd44cb
commit 3051b6897d
2 changed files with 33 additions and 3 deletions
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6
RNS/Destination.py
View File

@ -118,6 +118,9 @@ class Destination:
identity = RNS.Identity()
aspects = aspects+(identity.hexhash,)
if identity != None and self.type == Destination.PLAIN:
raise TypeError("Selected destination type PLAIN cannot hold an identity")
self.identity = identity
self.name = Destination.full_name(app_name, *aspects)
@ -146,6 +149,9 @@ class Destination:
:param app_data: *bytes* containing the app_data.
:param path_response: Internal flag used by :ref:`RNS.Transport<api-transport>`. Ignore.
"""
if self.type != Destination.SINGLE:
raise TypeError("Only SINGLE destination types can be announced")
destination_hash = self.hash
random_hash = RNS.Identity.get_random_hash()[0:5]+int(time.time()).to_bytes(5, "big")

30
RNS/Transport.py
View File

@ -457,7 +457,7 @@ class Transport:
sent = False
# Check if we have a known path for the destination in the path table
if packet.packet_type != RNS.Packet.ANNOUNCE and packet.destination_hash in Transport.destination_table:
if packet.packet_type != RNS.Packet.ANNOUNCE and packet.destination.type != RNS.Destination.PLAIN and packet.destination.type != RNS.Destination.GROUP and packet.destination_hash in Transport.destination_table:
outbound_interface = Transport.destination_table[packet.destination_hash][5]
# If there's more than one hop to the destination, and we know
@ -572,14 +572,38 @@ class Transport:
return True
if packet.context == RNS.Packet.CACHE_REQUEST:
return True
if packet.destination_type == RNS.Destination.PLAIN:
return True
if packet.packet_type != RNS.Packet.ANNOUNCE:
if packet.hops > 1:
RNS.log("Dropped PLAIN packet "+RNS.prettyhexrep(packet.hash)+" with "+str(packet.hops)+" hops", RNS.LOG_DEBUG)
return False
else:
return True
else:
RNS.log("Dropped invalid PLAIN announce packet", RNS.LOG_DEBUG)
return False
if packet.destination_type == RNS.Destination.GROUP:
if packet.packet_type != RNS.Packet.ANNOUNCE:
if packet.hops > 1:
RNS.log("Dropped GROUP packet "+RNS.prettyhexrep(packet.hash)+" with "+str(packet.hops)+" hops", RNS.LOG_DEBUG)
return False
else:
return True
else:
RNS.log("Dropped invalid GROUP announce packet", RNS.LOG_DEBUG)
return False
if not packet.packet_hash in Transport.packet_hashlist:
return True
else:
if packet.packet_type == RNS.Packet.ANNOUNCE:
return True
if packet.destination_type == RNS.Destination.SINGLE:
return True
else:
RNS.log("Dropped invalid announce packet", RNS.LOG_DEBUG)
return False
RNS.log("Filtered packet with hash "+RNS.prettyhexrep(packet.packet_hash), RNS.LOG_DEBUG)
return False