src/network/__init__.py

@@ -16,6 +16,7 @@ __all__ = ["AnnounceThread", "BMConnectionPool", "StoppableThread"]
 
 def start(config, state):
     """Start network threads"""
+    import state
     from .addrthread import AddrThread
     from .dandelion import Dandelion
     from .downloadthread import DownloadThread
@@ -27,7 +28,7 @@ def start(config, state):
 
     readKnownNodes()
     # init, needs to be early because other thread may access it early
-    Dandelion()
+    state.Dandelion = Dandelion()
     BMConnectionPool().connectToStream(1)
     for thread in (
         BMNetworkThread(), InvThread(), AddrThread(),

src/network/bmobject.py

@@ -7,7 +7,6 @@ import time
 import protocol
 import state
 from highlevelcrypto import calculateInventoryHash
-from network.dandelion import Dandelion
 
 logger = logging.getLogger('default')
 
@@ -112,7 +111,7 @@ class BMObject(object):  # pylint: disable=too-many-instance-attributes
         or advertise it unnecessarily)
         """
         # if it's a stem duplicate, pretend we don't have it
-        if Dandelion().hasHash(self.inventoryHash):
+        if state.Dandelion.hasHash(self.inventoryHash):
             return
         if self.inventoryHash in state.Inventory:
             raise BMObjectAlreadyHaveError()

src/network/bmproto.py

@@ -25,7 +25,6 @@ from network.bmobject import (
     BMObjectInsufficientPOWError, BMObjectInvalidError,
     BMObjectUnwantedStreamError
 )
-from network.dandelion import Dandelion
 from network.proxy import ProxyError
 
 from node import Node, Peer
@@ -355,10 +354,10 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             return True
 
         for i in map(str, items):
-            if i in state.Inventory and not Dandelion().hasHash(i):
+            if i in state.Inventory and not state.Dandelion.hasHash(i):
                 continue
-            if dandelion and not Dandelion().hasHash(i):
+            if dandelion and not state.Dandelion.hasHash(i):
-                Dandelion().addHash(i, self)
+                state.Dandelion.addHash(i, self)
             self.handleReceivedInventory(i)
 
         return True
@@ -420,9 +419,9 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             except KeyError:
                 pass
 
-        if self.object.inventoryHash in state.Inventory and Dandelion().hasHash(
+        if self.object.inventoryHash in state.Inventory and state.Dandelion.hasHash(
                 self.object.inventoryHash):
-            Dandelion().removeHash(
+            state.Dandelion.removeHash(
                 self.object.inventoryHash, "cycle detection")
 
         state.Inventory[self.object.inventoryHash] = (

src/network/dandelion.py

@@ -10,7 +10,6 @@ from time import time
 import connectionpool
 import state
 from queues import invQueue
-from singleton import Singleton
 
 # randomise routes after 600 seconds
 REASSIGN_INTERVAL = 600
@@ -26,7 +25,6 @@ Stem = namedtuple('Stem', ['child', 'stream', 'timeout'])
 logger = logging.getLogger('default')
 
 
-@Singleton
 class Dandelion:  # pylint: disable=old-style-class
     """Dandelion class for tracking stem/fluff stages."""
     def __init__(self):

src/network/downloadthread.py

@@ -6,7 +6,6 @@ import state
 import addresses
 import helper_random
 import protocol
-from dandelion import Dandelion
 from network.connectionpool import BMConnectionPool
 from objectracker import missingObjects
 from threads import StoppableThread
@@ -60,7 +59,7 @@ class DownloadThread(StoppableThread):
                 payload = bytearray()
                 chunkCount = 0
                 for chunk in request:
-                    if chunk in state.Inventory and not Dandelion().hasHash(chunk):
+                    if chunk in state.Inventory and not state.Dandelion.hasHash(chunk):
                         try:
                             del i.objectsNewToMe[chunk]
                         except KeyError:

src/network/invthread.py

@@ -9,7 +9,6 @@ import addresses
 import protocol
 import state
 from network.connectionpool import BMConnectionPool
-from network.dandelion import Dandelion
 from queues import invQueue
 from threads import StoppableThread
 
@@ -40,10 +39,10 @@ class InvThread(StoppableThread):
     @staticmethod
     def handleLocallyGenerated(stream, hashId):
         """Locally generated inventory items require special handling"""
-        Dandelion().addHash(hashId, stream=stream)
+        state.Dandelion.addHash(hashId, stream=stream)
         for connection in BMConnectionPool().connections():
             if state.dandelion and connection != \
-                    Dandelion().objectChildStem(hashId):
+                    state.Dandelion.objectChildStem(hashId):
                 continue
             connection.objectsNewToThem[hashId] = time()
 
@@ -52,7 +51,7 @@ class InvThread(StoppableThread):
             chunk = []
             while True:
                 # Dandelion fluff trigger by expiration
-                handleExpiredDandelion(Dandelion().expire())
+                handleExpiredDandelion(state.Dandelion.expire())
                 try:
                     data = invQueue.get(False)
                     chunk.append((data[0], data[1]))
@@ -75,7 +74,7 @@ class InvThread(StoppableThread):
                         except KeyError:
                             continue
                         try:
-                            if connection == Dandelion().objectChildStem(inv[1]):
+                            if connection == state.Dandelion.objectChildStem(inv[1]):
                                 # Fluff trigger by RNG
                                 # auto-ignore if config set to 0, i.e. dandelion is off
                                 if random.randint(1, 100) >= state.dandelion:  # nosec B311
@@ -105,7 +104,7 @@ class InvThread(StoppableThread):
             for _ in range(len(chunk)):
                 invQueue.task_done()
 
-            if Dandelion().refresh < time():
+            if state.Dandelion.refresh < time():
-                Dandelion().reRandomiseStems()
+                state.Dandelion.reRandomiseStems()
 
             self.stop.wait(1)

src/network/objectracker.py

@@ -4,8 +4,8 @@ Module for tracking objects
 import time
 from threading import RLock
 
+import state
 import network.connectionpool
-from network.dandelion import Dandelion
 from randomtrackingdict import RandomTrackingDict
 
 haveBloom = False
@@ -107,14 +107,14 @@ class ObjectTracker(object):
                 del i.objectsNewToMe[hashid]
             except KeyError:
                 if streamNumber in i.streams and (
-                        not Dandelion().hasHash(hashid)
+                        not state.Dandelion.hasHash(hashid)
-                        or Dandelion().objectChildStem(hashid) == i):
+                        or state.Dandelion.objectChildStem(hashid) == i):
                     with i.objectsNewToThemLock:
                         i.objectsNewToThem[hashid] = time.time()
                     # update stream number,
                     # which we didn't have when we just received the dinv
                     # also resets expiration of the stem mode
-                    Dandelion().setHashStream(hashid, streamNumber)
+                    state.Dandelion.setHashStream(hashid, streamNumber)
 
             if i == self:
                 try:

src/network/tcp.py

@@ -25,7 +25,6 @@ import connectionpool
 import knownnodes
 from network.advanceddispatcher import AdvancedDispatcher
 from network.bmproto import BMProto
-from network.dandelion import Dandelion
 from network.objectracker import ObjectTracker
 from network.socks4a import Socks4aConnection
 from network.socks5 import Socks5Connection
@@ -169,7 +168,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             knownnodes.increaseRating(self.destination)
             knownnodes.addKnownNode(
                 self.streams, self.destination, time.time())
-            Dandelion().maybeAddStem(self)
+            state.Dandelion.maybeAddStem(self)
         self.sendAddr()
         self.sendBigInv()
 
@@ -231,7 +230,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             with self.objectsNewToThemLock:
                 for objHash in state.Inventory.unexpired_hashes_by_stream(stream):
                     # don't advertise stem objects on bigInv
-                    if Dandelion().hasHash(objHash):
+                    if state.Dandelion.hasHash(objHash):
                         continue
                     bigInvList[objHash] = 0
         objectCount = 0
@@ -293,7 +292,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             if host_is_global:
                 knownnodes.addKnownNode(
                     self.streams, self.destination, time.time())
-                Dandelion().maybeRemoveStem(self)
+                state.Dandelion.maybeRemoveStem(self)
         else:
             self.checkTimeOffsetNotification()
             if host_is_global:

src/network/uploadthread.py

@@ -7,7 +7,6 @@ import helper_random
 import protocol
 import state
 from network.connectionpool import BMConnectionPool
-from network.dandelion import Dandelion
 from randomtrackingdict import RandomTrackingDict
 from threads import StoppableThread
 
@@ -41,8 +40,8 @@ class UploadThread(StoppableThread):
                 chunk_count = 0
                 for chunk in request:
                     del i.pendingUpload[chunk]
-                    if Dandelion().hasHash(chunk) and \
+                    if state.Dandelion.hasHash(chunk) and \
-                       i != Dandelion().objectChildStem(chunk):
+                       i != state.Dandelion.objectChildStem(chunk):
                         i.antiIntersectionDelay()
                         self.logger.info(
                             '%s asked for a stem object we didn\'t offer to it.',

src/state.py

@@ -97,3 +97,6 @@ class Placeholder(object):  # pylint:disable=too-few-public-methods
 
 
 Inventory = Placeholder("Inventory")
+
+
+Dandelion = Placeholder("Dandelion")