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Updated filtering rules. Fixes #18.
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550dfd44cb
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@ -118,6 +118,9 @@ class Destination:
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identity = RNS.Identity()
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aspects = aspects+(identity.hexhash,)
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if identity != None and self.type == Destination.PLAIN:
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raise TypeError("Selected destination type PLAIN cannot hold an identity")
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self.identity = identity
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self.name = Destination.full_name(app_name, *aspects)
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@ -146,6 +149,9 @@ class Destination:
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:param app_data: *bytes* containing the app_data.
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:param path_response: Internal flag used by :ref:`RNS.Transport<api-transport>`. Ignore.
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"""
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if self.type != Destination.SINGLE:
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raise TypeError("Only SINGLE destination types can be announced")
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destination_hash = self.hash
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random_hash = RNS.Identity.get_random_hash()[0:5]+int(time.time()).to_bytes(5, "big")
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@ -457,7 +457,7 @@ class Transport:
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sent = False
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# Check if we have a known path for the destination in the path table
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if packet.packet_type != RNS.Packet.ANNOUNCE and packet.destination_hash in Transport.destination_table:
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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:
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outbound_interface = Transport.destination_table[packet.destination_hash][5]
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# If there's more than one hop to the destination, and we know
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@ -572,14 +572,38 @@ class Transport:
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return True
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if packet.context == RNS.Packet.CACHE_REQUEST:
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return True
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if packet.destination_type == RNS.Destination.PLAIN:
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return True
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if packet.packet_type != RNS.Packet.ANNOUNCE:
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if packet.hops > 1:
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RNS.log("Dropped PLAIN packet "+RNS.prettyhexrep(packet.hash)+" with "+str(packet.hops)+" hops", RNS.LOG_DEBUG)
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return False
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else:
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return True
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else:
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RNS.log("Dropped invalid PLAIN announce packet", RNS.LOG_DEBUG)
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return False
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if packet.destination_type == RNS.Destination.GROUP:
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if packet.packet_type != RNS.Packet.ANNOUNCE:
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if packet.hops > 1:
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RNS.log("Dropped GROUP packet "+RNS.prettyhexrep(packet.hash)+" with "+str(packet.hops)+" hops", RNS.LOG_DEBUG)
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return False
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else:
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return True
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else:
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RNS.log("Dropped invalid GROUP announce packet", RNS.LOG_DEBUG)
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return False
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if not packet.packet_hash in Transport.packet_hashlist:
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return True
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else:
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if packet.packet_type == RNS.Packet.ANNOUNCE:
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return True
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if packet.destination_type == RNS.Destination.SINGLE:
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return True
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else:
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RNS.log("Dropped invalid announce packet", RNS.LOG_DEBUG)
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return False
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RNS.log("Filtered packet with hash "+RNS.prettyhexrep(packet.packet_hash), RNS.LOG_DEBUG)
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return False
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