Known destinations

FPE/FlexPE.py

@@ -16,15 +16,26 @@ class FlexPE:
 	destinations = []
 	interfaces   = []
 	configdir    = os.path.expanduser("~")+"/.flexpe"
-	configpath   = configdir+"/config"
+	configpath   = ""
+	storagepath  = ""
+	cachepath    = ""
 	
+	# TODO: Move this to Transport
 	packetlist   = []
 
-	def __init__(self,config=None):
-		if config != None:
-			self.configpath = config
-		else:
-			self.configpath = FlexPE.configpath
+	def __init__(self,configdir=None):
+		if configdir != None:
+			FlexPE.configdir = configdir
+		
+		FlexPE.configpath   = FlexPE.configdir+"/config"
+		FlexPE.storagepath = FlexPE.configdir+"/storage"
+		FlexPE.cachepath = FlexPE.configdir+"/storage/cache"
+
+		if not os.path.isdir(FlexPE.storagepath):
+			os.makedirs(FlexPE.storagepath)
+
+		if not os.path.isdir(FlexPE.cachepath):
+			os.makedirs(FlexPE.cachepath)
 
 		if os.path.isfile(self.configpath):
 			self.config = ConfigObj(self.configpath)
@@ -34,6 +45,7 @@ class FlexPE:
 			self.createDefaultConfig()
 
 		self.applyConfig()
+		FPE.Identity.loadKnownDestinations()
 		FlexPE.router = self
 
 	@staticmethod
@@ -41,23 +53,6 @@ class FlexPE:
 		destination.MTU = FlexPE.MTU
 		FlexPE.destinations.append(destination)
 
-	@staticmethod
-	def incoming(data):
-		packet_hash = FPE.Identity.fullHash(data)
-
-		if not packet_hash in FlexPE.packetlist:
-			FlexPE.packetlist.append(packet_hash)
-			packet = FPE.Packet(None, data)
-			packet.unpack()
-
-			if packet.packet_type == FPE.Packet.ANNOUNCE:
-				FPE.Identity.validateAnnounce(packet)
-			
-			if packet.packet_type == FPE.Packet.RESOURCE:
-				for destination in FlexPE.destinations:
-					if destination.hash == packet.destination_hash and destination.type == packet.destination_type:
-						destination.receive(packet.data)
-
 	@staticmethod
 	def outbound(raw):
 		for interface in FlexPE.interfaces:
@@ -76,7 +71,7 @@ class FlexPE:
 			try:
 				if c["type"] == "UdpInterface":
 					interface = UdpInterface.UdpInterface(
-						self,
+						FPE.Transport,
 						c["listen_ip"],
 						int(c["listen_port"]),
 						c["forward_ip"],
@@ -91,7 +86,7 @@ class FlexPE:
 
 				if c["type"] == "SerialInterface":
 					interface = SerialInterface.SerialInterface(
-						self,
+						FPE.Transport,
 						c["port"],
 						int(c["speed"]),
 						int(c["databits"]),

FPE/Identity.py

@@ -2,6 +2,9 @@ import base64
 import math
 import os
 import FPE
+import time
+import atexit
+import cPickle
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives import serialization
@@ -19,9 +22,9 @@ class Identity:
 	PADDINGSIZE= 336;
 
 	# Storage
-	remembered_destinations = {}
+	known_destinations = {}
 
-	def __init__(self):
+	def __init__(self,public_only=False):
 		# Initialize keys to none
 		self.prv = None
 		self.pub = None
@@ -30,17 +33,36 @@ class Identity:
 		self.hash = None
 		self.hexhash = None
 
+		if not public_only:
 			self.createKeys()
 
 	@staticmethod
 	def remember(hash, public_key, app_data = None):
 		FPE.log("Remembering "+FPE.hexrep(hash, False), FPE.LOG_VERBOSE)
-		Identity.remembered_destinations[hash] = [public_key, app_data]
+		Identity.known_destinations[hash] = [time.time(), public_key, app_data]
 
 	@staticmethod
 	def recall(identity):
 		pass
 
+	@staticmethod
+	def saveKnownDestinations():
+		FPE.log("Saving known destinations to storage...", FPE.LOG_VERBOSE)
+		file = open(FPE.FlexPE.storagepath+"/known_destinations","w")
+		cPickle.dump(Identity.known_destinations, file)
+		file.close()
+		FPE.log("Done saving known destinations to storage", FPE.LOG_VERBOSE)
+
+	@staticmethod
+	def loadKnownDestinations():
+		if os.path.isfile(FPE.FlexPE.storagepath+"/known_destinations"):
+			file = open(FPE.FlexPE.storagepath+"/known_destinations","r")
+			Identity.known_destinations = cPickle.load(file)
+			file.close()
+			FPE.log("Loaded "+str(len(Identity.known_destinations))+" known destinations from storage", FPE.LOG_VERBOSE)
+		else:
+			FPE.log("Destinations file does not exist, so no known destinations loaded", FPE.LOG_VERBOSE)
+
 	@staticmethod
 	def fullHash(data):
 		digest = hashes.Hash(hashes.SHA256(), backend=default_backend())
@@ -69,7 +91,7 @@ class Identity:
 
 			signed_data = destination_hash+public_key+random_hash+app_data
 
-			announced_identity = Identity()
+			announced_identity = Identity(public_only=True)
 			announced_identity.loadPublicKey(public_key)
 
 			if announced_identity.validate(signature, signed_data):
@@ -219,3 +241,8 @@ class Identity:
 	def getRandomHash(self):
 		return self.truncatedHash(os.urandom(10))
 
+
+def identityExithandler():
+	Identity.saveKnownDestinations()
+
+atexit.register(identityExithandler)

FPE/Interfaces/SerialInterface.py

@@ -62,7 +62,7 @@ class SerialInterface(Interface):
 
 
 	def processIncoming(self, data):
-		self.owner.__class__.incoming(data)
+		self.owner.inbound(data)
 
 
 	def processOutgoing(self,data):

FPE/Interfaces/UdpInterface.py

@@ -36,7 +36,7 @@ class UdpInterface(Interface):
 
 
     def processIncoming(self, data):
-        self.owner.__class__.incoming(data)
+        self.owner.inbound(data)
 
     def processOutgoing(self,data):
         udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

FPE/Transport.py

@@ -8,10 +8,29 @@ class Transport:
 	TUNNEL       = 0x03;
 	types        = [BROADCAST, TRANSPORT, RELAY, TUNNEL]
 
+	packet_hashlist = []
+
 	@staticmethod
 	def outbound(raw):
 		FPE.FlexPE.outbound(raw)
 
+	@staticmethod
+	def inbound(raw):
+		packet_hash = FPE.Identity.fullHash(raw)
+
+		if not packet_hash in Transport.packet_hashlist:
+			Transport.packet_hashlist.append(packet_hash)
+			packet = FPE.Packet(None, raw)
+			packet.unpack()
+
+			if packet.packet_type == FPE.Packet.ANNOUNCE:
+				FPE.Identity.validateAnnounce(packet)
+			
+			if packet.packet_type == FPE.Packet.RESOURCE:
+				for destination in FlexPE.destinations:
+					if destination.hash == packet.destination_hash and destination.type == packet.destination_type:
+						destination.receive(packet.data)
+
 	@staticmethod
 	def registerDestination(destination):
 		FPE.FlexPE.addDestination(destination)

Notes/Header format

@@ -3,7 +3,7 @@ header types
 type 1			00	One byte header, one 10 byte address field
 type 2			01	One byte header, two 10 byte address fields
 type 3			10	Reserved
-type 4			11	Reserved
+type 4			11	Reserved for extended packet format
 
 
 propagation types
@@ -24,7 +24,7 @@ link			11
 
 packet types
 -----------------
-message			00
-resource		01
+resource		00
+announce		01
 link request	10
 proof			11

t.py

@@ -12,7 +12,7 @@ def testCallback(message, receiver):
   print("----------")
 
 
-#fpe = FlexPE(config=os.path.expanduser("~")+"/.flexpe/config.test")
+#fpe = FlexPE(configdir=os.path.expanduser("~")+"/.flexpe2")
 fpe = FlexPE()
 identity = Identity()