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Implemented transport table cleanup
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Mark Qvist
parent
d169c3d9c1
commit
8e558814eb
@ -35,20 +35,24 @@ class Transport:
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# various situations
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LOCAL_REBROADCASTS_MAX = 2 # How many local rebroadcasts of an announce is allowed
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PATH_REQUEST_GRACE = 0.25 # Grace time before a path announcement is made, allows directly reachable peers to respond first
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PATH_REQUEST_RW = 2 # Path request random window
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PATH_REQUEST_GRACE = 0.25 # Grace time before a path announcement is made, allows directly reachable peers to respond first
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PATH_REQUEST_RW = 2 # Path request random window
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interfaces = [] # All active interfaces
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destinations = [] # All active destinations
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pending_links = [] # Links that are being established
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active_links = [] # Links that are active
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packet_hashlist = [] # A list of packet hashes for duplicate detection
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receipts = [] # Receipts of all outgoing packets for proof processing
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LINK_TIMEOUT = RNS.Link.KEEPALIVE * 2
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REVERSE_TIMEOUT = 30*60 # Reverse table entries are removed after max 30 minutes
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DESTINATION_TIMEOUT = 60*60*24*7 # Destination table entries are removed if unused for one week
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announce_table = {} # A table for storing announces currently waiting to be retransmitted
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destination_table = {} # A lookup table containing the next hop to a given destination
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reverse_table = {} # A lookup table for storing packet hashes used to return proofs and replies
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link_table = {} # A lookup table containing hops for links
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interfaces = [] # All active interfaces
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destinations = [] # All active destinations
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pending_links = [] # Links that are being established
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active_links = [] # Links that are active
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packet_hashlist = [] # A list of packet hashes for duplicate detection
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receipts = [] # Receipts of all outgoing packets for proof processing
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announce_table = {} # A table for storing announces currently waiting to be retransmitted
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destination_table = {} # A lookup table containing the next hop to a given destination
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reverse_table = {} # A lookup table for storing packet hashes used to return proofs and replies
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link_table = {} # A lookup table containing hops for links
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jobs_locked = False
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jobs_running = False
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@ -58,6 +62,8 @@ class Transport:
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announces_last_checked = 0.0
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announces_check_interval = 1.0
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hashlist_maxsize = 1000000
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tables_last_culled = 0.0
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tables_cull_interval = 5.0
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identity = None
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@ -151,11 +157,26 @@ class Transport:
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while (len(Transport.packet_hashlist) > Transport.hashlist_maxsize):
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Transport.packet_hashlist.pop(0)
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# Cull the reverse table according to max size and/or age of entries
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# TODO: Implement this
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if time.time() > Transport.tables_last_culled + Transport.tables_cull_interval:
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# Cull the reverse table according to timeout
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for truncated_packet_hash in Transport.reverse_table:
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reverse_entry = Transport.reverse_table[truncated_packet_hash]
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if time.time() > reverse_entry[2] + Transport.REVERSE_TIMEOUT:
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Transport.reverse_table.pop(truncated_packet_hash)
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# Cull the destination table in some way
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# TODO: Implement this
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# Cull the link table according to timeout
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for link_id in Transport.link_table:
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link_entry = Transport.link_table[link_id]
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if time.time() > link_entry[0] + Transport.LINK_TIMEOUT:
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Transport.link_table.pop(link_id)
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# Cull the destination table in some way
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for destination_hash in Transport.destination_table:
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destination_entry = Transport.destination_table[destination_hash]
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if time.time() > destination_entry[0] + Transport.DESTINATION_TIMEOUT:
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Transport.destination_table.pop(destination_hash)
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Transport.tables_last_culled = time.time()
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except Exception as e:
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RNS.log("An exception occurred while running Transport jobs.", RNS.LOG_ERROR)
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@ -191,6 +212,7 @@ class Transport:
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new_raw += packet.raw[2:]
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RNS.log("Packet was inserted into transport via "+RNS.prettyhexrep(Transport.destination_table[packet.destination_hash][1])+" on: "+str(outbound_interface), RNS.LOG_DEBUG)
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outbound_interface.processOutgoing(new_raw)
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Transport.destination_table[packet.destination_hash][0] = time.time()
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sent = True
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else:
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# Destination is directly reachable, and we know on
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@ -254,7 +276,6 @@ class Transport:
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@staticmethod
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def inbound(raw, interface=None):
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# TODO: Rewrite the redundant cache calls in this method
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while (Transport.jobs_running):
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sleep(0.1)
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@ -269,6 +290,7 @@ class Transport:
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if Transport.packet_filter(packet):
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Transport.packet_hashlist.append(packet.packet_hash)
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Transport.cache(packet)
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# General transport handling. Takes care of directing
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# packets according to transport tables and recording
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@ -295,6 +317,7 @@ class Transport:
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outbound_interface = Transport.destination_table[packet.destination_hash][5]
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outbound_interface.processOutgoing(new_raw)
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Transport.destination_table[packet.destination_hash][0] = time.time()
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if packet.packet_type == RNS.Packet.LINKREQUEST:
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# Entry format is
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@ -357,6 +380,7 @@ class Transport:
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new_raw += struct.pack("!B", packet.hops)
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new_raw += packet.raw[2:]
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outbound_interface.processOutgoing(new_raw)
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Transport.link_table[packet.destination_hash][0] = time.time()
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else:
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pass
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@ -459,7 +483,6 @@ class Transport:
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if destination.hash == packet.destination_hash and destination.type == packet.destination_type:
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packet.destination = destination
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destination.receive(packet)
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Transport.cache(packet)
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elif packet.packet_type == RNS.Packet.DATA:
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if packet.destination_type == RNS.Destination.LINK:
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@ -467,13 +490,11 @@ class Transport:
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if link.link_id == packet.destination_hash:
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packet.link = link
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link.receive(packet)
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Transport.cache(packet)
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else:
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for destination in Transport.destinations:
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if destination.hash == packet.destination_hash and destination.type == packet.destination_type:
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packet.destination = destination
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destination.receive(packet)
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Transport.cache(packet)
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if destination.proof_strategy == RNS.Destination.PROVE_ALL:
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packet.prove()
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@ -526,7 +547,7 @@ class Transport:
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# Check if this proof neds to be transported
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if packet.destination_hash in Transport.reverse_table:
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reverse_entry = Transport.reverse_table[packet.destination_hash]
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reverse_entry = Transport.reverse_table.pop(packet.destination_hash)
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if packet.receiving_interface == reverse_entry[1]:
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RNS.log("Proof received on correct interface, transporting it via "+str(reverse_entry[0]), RNS.LOG_DEBUG)
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new_raw = packet.raw[0:1]
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@ -581,8 +602,8 @@ class Transport:
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def shouldCache(packet):
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# TODO: Implement sensible rules for which
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# packets to cache
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if packet.context == RNS.Packet.RESOURCE_PRF:
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return True
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#if packet.context == RNS.Packet.RESOURCE_PRF:
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# return True
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return False
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@ -599,6 +620,8 @@ class Transport:
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RNS.log("Error writing packet to cache", RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e))
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# TODO: Implement cache requests. Needs methodology
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# rethinking. This is skeleton code.
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@staticmethod
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def cache_request_packet(packet):
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if len(packet.data) == RNS.Identity.HASHLENGTH/8:
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@ -612,6 +635,8 @@ class Transport:
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# TODO: Implement outbound for this
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# TODO: Implement cache requests. Needs methodology
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# rethinking. This is skeleton code.
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@staticmethod
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def cache_request(packet_hash):
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RNS.log("Cache request for "+RNS.prettyhexrep(packet_hash), RNS.LOG_EXTREME)
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@ -668,6 +693,8 @@ class Transport:
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else:
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RNS.log("No known path to requested destination, ignoring request", RNS.LOG_DEBUG)
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# TODO: Currently only used for cache requests.
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# Needs rethink.
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@staticmethod
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def transport_destination():
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# TODO: implement this
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