Implemented systemwide shared instance
This commit is contained in:
Mark Qvist
parent
e3bd91b82d
commit
8a69f7e88c
269
RNS/Transport.py
269
RNS/Transport.py
@ -38,30 +38,35 @@ class Transport:
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PATH_REQUEST_GRACE = 0.35 # 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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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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MAX_RECEIPTS = 1024 # Maximum number of receipts to keep track of
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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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MAX_RECEIPTS = 1024 # Maximum number of receipts to keep track of
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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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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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# TODO: "destination_table" should really be renamed to "path_table"
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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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held_announces = {} # A table containing temporarily held announce-table entries
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# Transport control destinations are used
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# for control purposes like path requests
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control_destinations = []
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control_hashes = []
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# Interfaces for communicating with
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# local clients connected to a shared
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# Reticulum instance
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local_client_interfaces = []
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# TODO: "destination_table" should really be renamed to "path_table"
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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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held_announces = {} # A table containing temporarily held announce-table entries
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jobs_locked = False
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jobs_running = False
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job_interval = 0.250
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@ -76,7 +81,9 @@ class Transport:
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identity = None
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@staticmethod
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def start():
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def start(reticulum_instance):
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Transport.owner = reticulum_instance
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if Transport.identity == None:
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transport_identity_path = RNS.Reticulum.storagepath+"/transport_identity"
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if os.path.isfile(transport_identity_path):
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@ -99,8 +106,10 @@ class Transport:
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RNS.log("Could not load packet hashlist from storage, the contained exception was: "+str(e), RNS.LOG_ERROR)
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# Create transport-specific destinations
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path_request_destination = RNS.Destination(None, RNS.Destination.IN, RNS.Destination.PLAIN, Transport.APP_NAME, "path", "request")
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path_request_destination.packet_callback(Transport.pathRequestHandler)
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Transport.path_request_destination = RNS.Destination(None, RNS.Destination.IN, RNS.Destination.PLAIN, Transport.APP_NAME, "path", "request")
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Transport.path_request_destination.packet_callback(Transport.pathRequestHandler)
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Transport.control_destinations.append(Transport.path_request_destination)
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Transport.control_hashes.append(Transport.path_request_destination.hash)
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thread = threading.Thread(target=Transport.jobloop)
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thread.setDaemon(True)
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@ -108,7 +117,7 @@ class Transport:
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if RNS.Reticulum.transport_enabled():
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destination_table_path = RNS.Reticulum.storagepath+"/destination_table"
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if os.path.isfile(destination_table_path):
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if os.path.isfile(destination_table_path) and not Transport.owner.is_connected_to_shared_instance:
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serialised_destinations = []
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try:
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file = open(destination_table_path, "rb")
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@ -117,16 +126,21 @@ class Transport:
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for serialised_entry in serialised_destinations:
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destination_hash = serialised_entry[0]
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timestamp = serialised_entry[1]
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received_from = serialised_entry[2]
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hops = serialised_entry[3]
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expires = serialised_entry[4]
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random_blobs = serialised_entry[5]
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receiving_interface = Transport.find_interface_from_hash(serialised_entry[6])
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announce_packet = Transport.get_cached_packet(serialised_entry[7])
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if announce_packet != None and receiving_interface != None:
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announce_packet.unpack()
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timestamp = serialised_entry[1]
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received_from = serialised_entry[2]
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hops = serialised_entry[3]
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expires = serialised_entry[4]
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random_blobs = serialised_entry[5]
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# We increase the hops, since reading a packet
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# from cache is equivalent to receiving it again
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# over an interface. It is cached with it's non-
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# increased hop-count.
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announce_packet.hops += 1
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Transport.destination_table[destination_hash] = [timestamp, received_from, hops, expires, random_blobs, receiving_interface, announce_packet]
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RNS.log("Loaded path table entry for "+RNS.prettyhexrep(destination_hash)+" from storage", RNS.LOG_DEBUG)
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else:
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@ -242,10 +256,11 @@ class Transport:
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Transport.reverse_table.pop(truncated_packet_hash)
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# Cull the link table according to timeout
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stale_links = []
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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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stale_links.append(link_id)
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# Cull the path table
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stale_paths = []
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@ -261,6 +276,17 @@ class Transport:
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stale_paths.append(destination_hash)
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RNS.log("Path to "+RNS.prettyhexrep(destination_hash)+" was removed since the attached interface no longer exists", RNS.LOG_DEBUG)
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i = 0
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for link_id in stale_links:
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Transport.link_table.pop(link_id)
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i += 1
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if i > 0:
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if i == 1:
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RNS.log("Dropped "+str(i)+" link", RNS.LOG_DEBUG)
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else:
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RNS.log("Dropped "+str(i)+" links", RNS.LOG_DEBUG)
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i = 0
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for destination_hash in stale_paths:
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Transport.destination_table.pop(destination_hash)
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@ -294,28 +320,26 @@ class Transport:
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packet.updateHash()
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sent = False
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# Check if we have a known path for the destination
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# in the destination table
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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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outbound_interface = Transport.destination_table[packet.destination_hash][5]
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if Transport.destination_table[packet.destination_hash][2] > 1:
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# Insert packet into transport
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new_flags = (RNS.Packet.HEADER_2) << 6 | (Transport.TRANSPORT) << 4 | (packet.flags & 0b00001111)
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new_raw = struct.pack("!B", new_flags)
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new_raw += packet.raw[1:2]
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new_raw += Transport.destination_table[packet.destination_hash][1]
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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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if packet.header_type == RNS.Packet.HEADER_1:
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# Insert packet into transport
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new_flags = (RNS.Packet.HEADER_2) << 6 | (Transport.TRANSPORT) << 4 | (packet.flags & 0b00001111)
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new_raw = struct.pack("!B", new_flags)
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new_raw += packet.raw[1:2]
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new_raw += Transport.destination_table[packet.destination_hash][1]
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new_raw += packet.raw[2:]
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# TODO: Remove at some point
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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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# what interface, so transmit only on that one
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RNS.log("Transmitting "+str(len(packet.raw))+" bytes on: "+str(outbound_interface), RNS.LOG_EXTREME)
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RNS.log("Hash is "+RNS.prettyhexrep(packet.packet_hash), RNS.LOG_EXTREME)
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outbound_interface.processOutgoing(packet.raw)
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sent = True
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@ -364,7 +388,9 @@ class Transport:
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@staticmethod
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def packet_filter(packet):
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# TODO: Think long and hard about this
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# TODO: Think long and hard about this.
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# Is it even strictly necessary with the current
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# transport rules?
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if packet.context == RNS.Packet.KEEPALIVE:
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return True
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if packet.context == RNS.Packet.RESOURCE_REQ:
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@ -373,6 +399,8 @@ class Transport:
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return True
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if packet.context == RNS.Packet.RESOURCE:
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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 not packet.packet_hash in Transport.packet_hashlist:
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return True
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else:
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@ -401,10 +429,6 @@ 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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for local_client in Transport.local_client_interfaces:
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if local_client != interface:
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local_client.processOutgoing(new_raw)
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if Transport.is_local_client_interface(interface):
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packet.hops -= 1
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elif Transport.interface_to_shared_instance(interface):
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@ -415,10 +439,47 @@ class Transport:
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Transport.packet_hashlist.append(packet.packet_hash)
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Transport.cache(packet)
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# Check special conditions for local clients connected
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# through a shared Reticulum instance
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from_local_client = (packet.receiving_interface in Transport.local_client_interfaces)
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for_local_client = (packet.packet_type != RNS.Packet.ANNOUNCE) and (packet.destination_hash in Transport.destination_table and Transport.destination_table[packet.destination_hash][2] == 0)
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for_local_client_link = (packet.packet_type != RNS.Packet.ANNOUNCE) and (packet.destination_hash in Transport.link_table and Transport.link_table[packet.destination_hash][4] in Transport.local_client_interfaces)
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for_local_client_link |= (packet.packet_type != RNS.Packet.ANNOUNCE) and (packet.destination_hash in Transport.link_table and Transport.link_table[packet.destination_hash][2] in Transport.local_client_interfaces)
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proof_for_local_client = (packet.destination_hash in Transport.reverse_table) and (Transport.reverse_table[packet.destination_hash][0] in Transport.local_client_interfaces)
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# Plain broadcast packets from local clients are sent
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# directly on all attached interfaces, since they are
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# never injected into transport.
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if not packet.destination_hash in Transport.control_hashes:
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if packet.destination_type == RNS.Destination.PLAIN and packet.transport_type == Transport.BROADCAST:
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# Send to all interfaces except the originator
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if from_local_client:
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for interface in Transport.interfaces:
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if interface != packet.receiving_interface:
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interface.processOutgoing(packet.raw)
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# If the packet was not from a local client, send
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# it directly to all local clients
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else:
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for interface in Transport.local_client_interfaces:
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interface.processOutgoing(packet.raw)
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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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# entries in reverse and link tables.
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if RNS.Reticulum.transport_enabled():
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if RNS.Reticulum.transport_enabled() or from_local_client or for_local_client or for_local_client_link:
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# If there is no transport id, but the packet is
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# for a local client, we generate the transport
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# id (it was stripped on the previous hop, since
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# we "spoof" the hop count for clients behind a
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# shared instance, so they look directly reach-
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# able), and reinsert, so the normal transport
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# implementation can handle the packet.
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if packet.transport_id == None and for_local_client:
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packet.transport_id = Transport.identity.hash
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if packet.transport_id != None and packet.packet_type != RNS.Packet.ANNOUNCE:
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if packet.transport_id == Transport.identity.hash:
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RNS.log("Received packet in transport for "+RNS.prettyhexrep(packet.destination_hash)+" with matching transport ID, transporting it...", RNS.LOG_DEBUG)
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@ -432,12 +493,17 @@ class Transport:
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new_raw += struct.pack("!B", packet.hops)
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new_raw += next_hop
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new_raw += packet.raw[12:]
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else:
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elif remaining_hops == 1:
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# Strip transport headers and transmit
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new_flags = (RNS.Packet.HEADER_1) << 6 | (Transport.BROADCAST) << 4 | (packet.flags & 0b00001111)
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new_raw = struct.pack("!B", new_flags)
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new_raw += struct.pack("!B", packet.hops)
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new_raw += packet.raw[12:]
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elif remaining_hops == 0:
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# Just increase hop count and transmit
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new_raw = packet.raw[0:1]
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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 = Transport.destination_table[packet.destination_hash][5]
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outbound_interface.processOutgoing(new_raw)
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@ -474,7 +540,7 @@ class Transport:
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# Link transport handling. Directs packets according
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# to entries in the link tables
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if packet.packet_type != RNS.Packet.ANNOUNCE and packet.packet_type != RNS.Packet.LINKREQUEST:
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if packet.packet_type != RNS.Packet.ANNOUNCE and packet.packet_type != RNS.Packet.LINKREQUEST and packet.context != RNS.Packet.LRPROOF:
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if packet.destination_hash in Transport.link_table:
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link_entry = Transport.link_table[packet.destination_hash]
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# If receiving and outbound interface is
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@ -602,7 +668,7 @@ class Transport:
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if (RNS.Reticulum.transport_enabled() or Transport.from_local_client(packet)) and packet.context != RNS.Packet.PATH_RESPONSE:
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# If the announce is from a local client,
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# we announce it immediately, but only one
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# time, and also set the hops to 0.
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# time.
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if Transport.from_local_client(packet):
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retransmit_timeout = now
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retries = Transport.PATHFINDER_R
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@ -619,15 +685,41 @@ class Transport:
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attached_interface
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]
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# If we have any local clients connected, we re-
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# transmit the announce to them immediately
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if (len(Transport.local_client_interfaces)):
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announce_identity = RNS.Identity.recall(packet.destination_hash)
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announce_destination = RNS.Destination(announce_identity, RNS.Destination.OUT, RNS.Destination.SINGLE, "unknown", "unknown");
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announce_destination.hash = packet.destination_hash
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announce_destination.hexhash = announce_destination.hash.hex()
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announce_context = RNS.Packet.NONE
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announce_data = packet.data
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new_announce = RNS.Packet(
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announce_destination,
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announce_data,
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RNS.Packet.ANNOUNCE,
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context = announce_context,
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header_type = RNS.Packet.HEADER_2,
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transport_type = Transport.TRANSPORT,
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transport_id = Transport.identity.hash,
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attached_interface = attached_interface
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)
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new_announce.hops = packet.hops
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new_announce.send()
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Transport.destination_table[packet.destination_hash] = [now, received_from, announce_hops, expires, random_blobs, packet.receiving_interface, packet]
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RNS.log("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)
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# Handling for linkrequests to local destinations
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elif packet.packet_type == RNS.Packet.LINKREQUEST:
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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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# Handling for local data packets
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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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for link in Transport.active_links:
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@ -648,12 +740,12 @@ class Transport:
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if destination.callbacks.proof_requested(packet):
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packet.prove()
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# Handling for proofs and link-request proofs
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elif packet.packet_type == RNS.Packet.PROOF:
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if packet.context == RNS.Packet.LRPROOF:
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# This is a link request proof, check if it
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# needs to be transported
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if RNS.Reticulum.transport_enabled() and packet.destination_hash in Transport.link_table:
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if (RNS.Reticulum.transport_enabled() or for_local_client_link or from_local_client) and packet.destination_hash in Transport.link_table:
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link_entry = Transport.link_table[packet.destination_hash]
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if packet.receiving_interface == link_entry[2]:
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# TODO: Should we validate the LR proof at each transport
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@ -689,7 +781,7 @@ class Transport:
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proof_hash = None
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# Check if this proof neds to be transported
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if RNS.Reticulum.transport_enabled() and packet.destination_hash in Transport.reverse_table:
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if (RNS.Reticulum.transport_enabled() or from_local_client or proof_for_local_client) and packet.destination_hash in Transport.reverse_table:
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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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@ -757,6 +849,11 @@ class Transport:
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return False
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# When caching packets to storage, they are written
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# exactly as they arrived over their interface. This
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# means that they have not had their hop count
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# increased yet! Take note of this when reading from
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# the packet cache.
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@staticmethod
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def cache(packet, force_cache=False):
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if RNS.Transport.shouldCache(packet) or force_cache:
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@ -931,27 +1028,47 @@ class Transport:
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except Exception as e:
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RNS.log("Could not save packet hashlist to storage, the contained exception was: "+str(e), RNS.LOG_ERROR)
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RNS.log("Saving path table to storage...", RNS.LOG_VERBOSE)
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try:
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serialised_destinations = []
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for destination_hash in Transport.destination_table:
|
||||
# Get the destination entry from the destination table
|
||||
de = Transport.destination_table[destination_hash]
|
||||
interface_hash = de[5].get_hash()
|
||||
if not Transport.owner.is_connected_to_shared_instance:
|
||||
RNS.log("Saving path table to storage...", RNS.LOG_VERBOSE)
|
||||
try:
|
||||
serialised_destinations = []
|
||||
for destination_hash in Transport.destination_table:
|
||||
# Get the destination entry from the destination table
|
||||
de = Transport.destination_table[destination_hash]
|
||||
interface_hash = de[5].get_hash()
|
||||
|
||||
# Only store destination table entry if the associated
|
||||
# interface is still active
|
||||
interface = Transport.find_interface_from_hash(interface_hash)
|
||||
if interface != None:
|
||||
Transport.cache(de[6], force_cache=True)
|
||||
packet_hash = de[6].getHash()
|
||||
serialised_entry = [destination_hash, de[0], de[1], de[2], de[3], de[4], interface_hash, packet_hash]
|
||||
serialised_destinations.append(serialised_entry)
|
||||
# Only store destination table entry if the associated
|
||||
# interface is still active
|
||||
interface = Transport.find_interface_from_hash(interface_hash)
|
||||
if interface != None:
|
||||
# Get the destination entry from the destination table
|
||||
de = Transport.destination_table[destination_hash]
|
||||
timestamp = de[0]
|
||||
received_from = de[1]
|
||||
hops = de[2]
|
||||
expires = de[3]
|
||||
random_blobs = de[4]
|
||||
packet_hash = de[6].getHash()
|
||||
|
||||
destination_table_path = RNS.Reticulum.storagepath+"/destination_table"
|
||||
file = open(destination_table_path, "wb")
|
||||
file.write(umsgpack.packb(serialised_destinations))
|
||||
file.close()
|
||||
RNS.log("Done saving path table 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)
|
||||
serialised_entry = [
|
||||
destination_hash,
|
||||
timestamp,
|
||||
received_from,
|
||||
hops,
|
||||
expires,
|
||||
random_blobs,
|
||||
interface_hash,
|
||||
packet_hash
|
||||
]
|
||||
|
||||
serialised_destinations.append(serialised_entry)
|
||||
|
||||
Transport.cache(de[6], force_cache=True)
|
||||
|
||||
destination_table_path = RNS.Reticulum.storagepath+"/destination_table"
|
||||
file = open(destination_table_path, "wb")
|
||||
file.write(umsgpack.packb(serialised_destinations))
|
||||
file.close()
|
||||
RNS.log("Done saving path table 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)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user