134 lines
4.3 KiB
Python
134 lines
4.3 KiB
Python
import time
|
|
from threading import RLock
|
|
|
|
import network.connectionpool
|
|
from network.dandelion import Dandelion
|
|
from randomtrackingdict import RandomTrackingDict
|
|
|
|
haveBloom = False
|
|
|
|
try:
|
|
# pybloomfiltermmap
|
|
from pybloomfilter import BloomFilter
|
|
haveBloom = True
|
|
except ImportError:
|
|
try:
|
|
# pybloom
|
|
from pybloom import BloomFilter
|
|
haveBloom = True
|
|
except ImportError:
|
|
pass
|
|
|
|
# it isn't actually implemented yet so no point in turning it on
|
|
haveBloom = False
|
|
|
|
# tracking pending downloads globally, for stats
|
|
missingObjects = {}
|
|
|
|
|
|
class ObjectTracker(object):
|
|
invCleanPeriod = 300
|
|
invInitialCapacity = 50000
|
|
invErrorRate = 0.03
|
|
trackingExpires = 3600
|
|
initialTimeOffset = 60
|
|
|
|
def __init__(self):
|
|
self.objectsNewToMe = RandomTrackingDict()
|
|
self.objectsNewToThem = {}
|
|
self.objectsNewToThemLock = RLock()
|
|
self.initInvBloom()
|
|
self.initAddrBloom()
|
|
self.lastCleaned = time.time()
|
|
|
|
def initInvBloom(self):
|
|
if haveBloom:
|
|
# lock?
|
|
self.invBloom = BloomFilter(capacity=ObjectTracker.invInitialCapacity,
|
|
error_rate=ObjectTracker.invErrorRate)
|
|
|
|
def initAddrBloom(self):
|
|
if haveBloom:
|
|
# lock?
|
|
self.addrBloom = BloomFilter(capacity=ObjectTracker.invInitialCapacity,
|
|
error_rate=ObjectTracker.invErrorRate)
|
|
|
|
def clean(self):
|
|
if self.lastCleaned < time.time() - ObjectTracker.invCleanPeriod:
|
|
if haveBloom:
|
|
if len(missingObjects) == 0:
|
|
self.initInvBloom()
|
|
self.initAddrBloom()
|
|
else:
|
|
# release memory
|
|
deadline = time.time() - ObjectTracker.trackingExpires
|
|
with self.objectsNewToThemLock:
|
|
self.objectsNewToThem = {k: v for k, v in self.objectsNewToThem.iteritems() if v >= deadline}
|
|
self.lastCleaned = time.time()
|
|
|
|
def hasObj(self, hashid):
|
|
if haveBloom:
|
|
return hashid in self.invBloom
|
|
else:
|
|
return hashid in self.objectsNewToMe
|
|
|
|
def handleReceivedInventory(self, hashId):
|
|
if haveBloom:
|
|
self.invBloom.add(hashId)
|
|
try:
|
|
with self.objectsNewToThemLock:
|
|
del self.objectsNewToThem[hashId]
|
|
except KeyError:
|
|
pass
|
|
if hashId not in missingObjects:
|
|
missingObjects[hashId] = time.time()
|
|
self.objectsNewToMe[hashId] = True
|
|
|
|
def handleReceivedObject(self, streamNumber, hashid):
|
|
for i in network.connectionpool.BMConnectionPool().inboundConnections.values(
|
|
) + network.connectionpool.BMConnectionPool().outboundConnections.values():
|
|
if not i.fullyEstablished:
|
|
continue
|
|
try:
|
|
del i.objectsNewToMe[hashid]
|
|
except KeyError:
|
|
if streamNumber in i.streams and (
|
|
not Dandelion().hasHash(hashid) or 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)
|
|
|
|
if i == self:
|
|
try:
|
|
with i.objectsNewToThemLock:
|
|
del i.objectsNewToThem[hashid]
|
|
except KeyError:
|
|
pass
|
|
self.objectsNewToMe.setLastObject()
|
|
|
|
def hasAddr(self, addr):
|
|
if haveBloom:
|
|
return addr in self.invBloom
|
|
|
|
def addAddr(self, hashid):
|
|
if haveBloom:
|
|
self.addrBloom.add(hashid)
|
|
|
|
|
|
"""
|
|
addr sending -> per node upload queue, and flush every minute or so
|
|
inv sending -> if not in bloom, inv immediately, otherwise put into a per node upload queue
|
|
and flush every minute or so
|
|
data sending -> a simple queue
|
|
no bloom
|
|
- if inv arrives
|
|
- if we don't have it, add tracking and download queue
|
|
- if we do have it, remove from tracking
|
|
tracking downloads
|
|
- per node hash of items the node has but we don't
|
|
tracking inv
|
|
- per node hash of items that neither the remote node nor we have
|
|
"""
|