cis-kuldeep/PyBitmessage-2021-04-27
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Merge pull request #704 from Atheros1/master

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removed use of memoryview so that we can support python 2.7.3
This commit is contained in:
Jonathan Warren 2014-08-06 16:33:30 -04:00
commit c78b3a1331
4 changed files with 80 additions and 96 deletions
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6
src/bitmessagemain.py
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@ -19,12 +19,12 @@ import sys
#potentially render this version check useless. So logging won't be used here until
#there is a more efficient way to configure logging
if sys.hexversion >= 0x3000000:
msg = "PyBitmessage does not support Python 3. Python 2.7.5 or later is required. Your version: %s" % sys.version
msg = "PyBitmessage does not support Python 3. Python 2.7.3 or later is required. Your version: %s" % sys.version
#logger.critical(msg)
sys.stdout.write(msg)
sys.exit(0)
if sys.hexversion < 0x20705F0:
msg = "You should use Python 2.7.5 or greater (but not Python 3). Your version: %s" % sys.version
if sys.hexversion < 0x20703F0:
msg = "You should use Python 2.7.3 or greater (but not Python 3). Your version: %s" % sys.version
#logger.critical(msg)
sys.stdout.write(msg)
sys.exit(0)

63
src/class_receiveDataThread.py
View File

@ -62,7 +62,7 @@ class receiveDataThread(threading.Thread):
def run(self):
with shared.printLock:
print 'ID of the receiveDataThread is', str(id(self)) + '. The size of the shared.connectedHostsList is now', len(shared.connectedHostsList)
print 'receiveDataThread starting. ID', str(id(self)) + '. The size of the shared.connectedHostsList is now', len(shared.connectedHostsList)
while True:
dataLen = len(self.data)
@ -76,7 +76,7 @@ class receiveDataThread(threading.Thread):
break
except Exception as err:
with shared.printLock:
print 'sock.recv error. Closing receiveData thread (HOST:', self.peer, 'ID:', str(id(self)) + ').', err
print 'sock.recv error. Closing receiveData thread (' + str(self.peer) + ', Thread ID:', str(id(self)) + ').', err
break
# print 'Received', repr(self.data)
if len(self.data) == dataLen: # If self.sock.recv returned no data:
@ -92,7 +92,7 @@ class receiveDataThread(threading.Thread):
print 'removed self (a receiveDataThread) from selfInitiatedConnections'
except:
pass
shared.broadcastToSendDataQueues((0, 'shutdown', self.peer)) # commands the corresponding sendDataThread to shut itself down.
self.sendDataThreadQueue.put((0, 'shutdown','no data')) # commands the corresponding sendDataThread to shut itself down.
try:
del shared.connectedHostsList[self.peer.host]
except Exception as err:
@ -106,47 +106,33 @@ class receiveDataThread(threading.Thread):
pass
shared.UISignalQueue.put(('updateNetworkStatusTab', 'no data'))
with shared.printLock:
print 'The size of the connectedHostsList is now:', len(shared.connectedHostsList)
print 'receiveDataThread ending. ID', str(id(self)) + '. The size of the shared.connectedHostsList is now', len(shared.connectedHostsList)
def processData(self):
# if shared.verbose >= 3:
# with shared.printLock:
# print 'self.data is currently ', repr(self.data)
#
if len(self.data) < shared.Header.size: # if so little of the data has arrived that we can't even read the checksum then wait for more data.
return
#Use a memoryview so we don't copy data unnecessarily
view = memoryview(self.data)
magic,command,payloadLength,checksum = shared.Header.unpack(view[:shared.Header.size])
view = view[shared.Header.size:]
if magic != 0xE9BEB4D9:
#if shared.verbose >= 1:
# with shared.printLock:
# print 'The magic bytes were not correct. First 40 bytes of data: ' + repr(self.data[0:40])
magic,command,payloadLength,checksum = shared.Header.unpack(self.data[:shared.Header.size])
if magic != 0xE9BEB4D9:
self.data = ""
return
if payloadLength > 20000000:
logger.info('The incoming message, which we have not yet download, is too large. Ignoring it. (unfortunately there is no way to tell the other node to stop sending it except to disconnect.) Message size: %s' % payloadLength)
self.data = view[payloadLength:].tobytes()
del view,magic,command,payloadLength,checksum # we don't need these anymore and better to clean them now before the recursive call rather than after
self.data = self.data[payloadLength + shared.Header.size:]
del magic,command,payloadLength,checksum # we don't need these anymore and better to clean them now before the recursive call rather than after
self.processData()
return
if len(view) < payloadLength: # check if the whole message has arrived yet.
if len(self.data) < payloadLength + shared.Header.size: # check if the whole message has arrived yet.
return
payload = view[:payloadLength]
payload = self.data[shared.Header.size:payloadLength + shared.Header.size]
if checksum != hashlib.sha512(payload).digest()[0:4]: # test the checksum in the message.
print 'Checksum incorrect. Clearing this message.'
self.data = view[payloadLength:].tobytes()
del view,magic,command,payloadLength,checksum,payload #again better to clean up before the recursive call
self.data = self.data[payloadLength + shared.Header.size:]
del magic,command,payloadLength,checksum,payload # better to clean up before the recursive call
self.processData()
return
#We can now revert back to bytestrings and take this message out
payload = payload.tobytes()
self.data = view[payloadLength:].tobytes()
del view,magic,payloadLength,checksum
# The time we've last seen this node is obviously right now since we
# just received valid data from it. So update the knownNodes list so
# that other peers can be made aware of its existance.
@ -188,7 +174,10 @@ class receiveDataThread(threading.Thread):
#elif command == 'alert':
# pass
if self.data == '':
del payload
self.data = self.data[payloadLength + shared.Header.size:] # take this message out and then process the next message
if self.data == '': # if there are no more messages
while len(self.objectsThatWeHaveYetToGetFromThisPeer) > 0:
shared.numberOfInventoryLookupsPerformed += 1
objectHash, = random.sample(
@ -196,24 +185,22 @@ class receiveDataThread(threading.Thread):
if objectHash in shared.inventory:
with shared.printLock:
print 'Inventory (in memory) already has object listed in inv message.'
del self.objectsThatWeHaveYetToGetFromThisPeer[
objectHash]
elif shared.isInSqlInventory(objectHash):
if shared.verbose >= 3:
with shared.printLock:
print 'Inventory (SQL on disk) already has object listed in inv message.'
del self.objectsThatWeHaveYetToGetFromThisPeer[
objectHash]
else:
# We don't have the object in our inventory. Let's request it.
self.sendgetdata(objectHash)
del self.objectsThatWeHaveYetToGetFromThisPeer[
objectHash] # It is possible that the remote node might not respond with the object. In that case, we'll very likely get it from someone else anyway.
if len(self.objectsThatWeHaveYetToGetFromThisPeer) == 0:
with shared.printLock:
print '(concerning', str(self.peer) + ')', 'number of objectsThatWeHaveYetToGetFromThisPeer is now', len(self.objectsThatWeHaveYetToGetFromThisPeer)
print '(concerning', str(self.peer) + ')', 'number of objectsThatWeHaveYetToGetFromThisPeer is now 0'
try:
del shared.numberOfObjectsThatWeHaveYetToGetPerPeer[
self.peer] # this data structure is maintained so that we can keep track of how many total objects, across all connections, are currently outstanding. If it goes too high it can indicate that we are under attack by multiple nodes working together.
@ -221,9 +208,9 @@ class receiveDataThread(threading.Thread):
pass
break
if len(self.objectsThatWeHaveYetToGetFromThisPeer) == 0:
# We had objectsThatWeHaveYetToGetFromThisPeer but the loop ran, they were all in our inventory, and now we don't have any to get anymore.
with shared.printLock:
print '(concerning', str(self.peer) + ')', 'number of objectsThatWeHaveYetToGetFromThisPeer is now', len(self.objectsThatWeHaveYetToGetFromThisPeer)
print '(concerning', str(self.peer) + ')', 'number of objectsThatWeHaveYetToGetFromThisPeer is now 0'
try:
del shared.numberOfObjectsThatWeHaveYetToGetPerPeer[
self.peer] # this data structure is maintained so that we can keep track of how many total objects, across all connections, are currently outstanding. If it goes too high it can indicate that we are under attack by multiple nodes working together.
@ -239,11 +226,13 @@ class receiveDataThread(threading.Thread):
def sendpong(self):
with shared.printLock:
print 'Sending pong'
self.sendDataThreadQueue.put((0, 'sendRawData', shared.CreatePacket('pong')))
def recverack(self):
with shared.printLock:
print 'verack received'
self.verackReceived = True
if self.verackSent:
@ -279,7 +268,7 @@ class receiveDataThread(threading.Thread):
with shared.printLock:
print 'We are connected to too many people. Closing connection.'
shared.broadcastToSendDataQueues((0, 'shutdown', self.peer))
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
return
self.sendBigInv()
@ -742,7 +731,7 @@ class receiveDataThread(threading.Thread):
return
self.remoteProtocolVersion, = unpack('>L', data[:4])
if self.remoteProtocolVersion <= 1:
shared.broadcastToSendDataQueues((0, 'shutdown', self.peer))
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
with shared.printLock:
print 'Closing connection to old protocol version 1 node: ', self.peer
return
@ -765,7 +754,7 @@ class receiveDataThread(threading.Thread):
print 'Remote node useragent:', useragent, ' stream number:', self.streamNumber
if self.streamNumber != 1:
shared.broadcastToSendDataQueues((0, 'shutdown', self.peer))
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
with shared.printLock:
print 'Closed connection to', self.peer, 'because they are interested in stream', self.streamNumber, '.'
return
@ -776,7 +765,7 @@ class receiveDataThread(threading.Thread):
if not self.initiatedConnection:
self.sendDataThreadQueue.put((0, 'setStreamNumber', self.streamNumber))
if data[72:80] == shared.eightBytesOfRandomDataUsedToDetectConnectionsToSelf:
shared.broadcastToSendDataQueues((0, 'shutdown', self.peer))
self.sendDataThreadQueue.put((0, 'shutdown','no data'))
with shared.printLock:
print 'Closing connection to myself: ', self.peer
return

29
src/class_sendDataThread.py
View File

@ -20,9 +20,6 @@ class sendDataThread(threading.Thread):
threading.Thread.__init__(self)
self.sendDataThreadQueue = sendDataThreadQueue
shared.sendDataQueues.append(self.sendDataThreadQueue)
with shared.printLock:
print 'The length of sendDataQueues at sendDataThread init is:', len(shared.sendDataQueues)
self.data = ''
self.objectHashHolderInstance = objectHashHolder(self.sendDataThreadQueue)
self.objectHashHolderInstance.start()
@ -67,14 +64,17 @@ class sendDataThread(threading.Thread):
def sendBytes(self, data):
self.sock.sendall(data)
shared.numberOfBytesSent += len(data)
self.lastTimeISentData = int(time.time())
def run(self):
with shared.printLock:
print 'sendDataThread starting. ID:', str(id(self))+'. Number of queues in sendDataQueues:', len(shared.sendDataQueues)
while True:
deststream, command, data = self.sendDataThreadQueue.get()
if deststream == self.streamNumber or deststream == 0:
if command == 'shutdown':
if data == self.peer or data == 'all':
with shared.printLock:
print 'sendDataThread (associated with', self.peer, ') ID:', id(self), 'shutting down now.'
break
@ -96,11 +96,8 @@ class sendDataThread(threading.Thread):
elif command == 'advertisepeer':
self.objectHashHolderInstance.holdPeer(data)
elif command == 'sendaddr':
if not self.connectionIsOrWasFullyEstablished:
# not sending addr because we haven't sent and heard a verack from the remote node yet
return
numberOfAddressesInAddrMessage = len(
data)
if self.connectionIsOrWasFullyEstablished: # only send addr messages if we have send and heard a verack from the remote node
numberOfAddressesInAddrMessage = len(data)
payload = ''
for hostDetails in data:
timeLastReceivedMessageFromThisNode, streamNumber, services, host, port = hostDetails
@ -116,16 +113,14 @@ class sendDataThread(threading.Thread):
packet = shared.CreatePacket('addr', payload)
try:
self.sendBytes(packet)
self.lastTimeISentData = int(time.time())
except:
with shared.printLock:
print 'sendaddr: self.sock.sendall failed'
break
elif command == 'advertiseobject':
self.objectHashHolderInstance.holdHash(data)
elif command == 'sendinv':
if not self.connectionIsOrWasFullyEstablished:
# not sending inv because we haven't sent and heard a verack from the remote node yet
return
if self.connectionIsOrWasFullyEstablished: # only send inv messages if we have send and heard a verack from the remote node
payload = ''
for hash in data:
if hash not in self.someObjectsOfWhichThisRemoteNodeIsAlreadyAware:
@ -135,8 +130,8 @@ class sendDataThread(threading.Thread):
packet = shared.CreatePacket('inv', payload)
try:
self.sendBytes(packet)
self.lastTimeISentData = int(time.time())
except:
with shared.printLock:
print 'sendinv: self.sock.sendall failed'
break
elif command == 'pong':
@ -148,15 +143,15 @@ class sendDataThread(threading.Thread):
packet = shared.CreatePacket('pong')
try:
self.sendBytes(packet)
self.lastTimeISentData = int(time.time())
except:
with shared.printLock:
print 'send pong failed'
break
elif command == 'sendRawData':
try:
self.sendBytes(data)
self.lastTimeISentData = int(time.time())
except:
with shared.printLock:
print 'Sending of data to', self.peer, 'failed. sendDataThread thread', self, 'ending now.'
break
elif command == 'connectionIsOrWasFullyEstablished':
@ -172,5 +167,5 @@ class sendDataThread(threading.Thread):
pass
shared.sendDataQueues.remove(self.sendDataThreadQueue)
with shared.printLock:
print 'Number of queues remaining in sendDataQueues:', len(shared.sendDataQueues)
print 'sendDataThread ending. ID:', str(id(self))+'. Number of queues in sendDataQueues:', len(shared.sendDataQueues)
self.objectHashHolderInstance.close()

2
src/shared.py
View File

@ -329,7 +329,7 @@ def isProofOfWorkSufficient(
def doCleanShutdown():
global shutdown
shutdown = 1 #Used to tell proof of work worker threads and the objectProcessorThread to exit.
broadcastToSendDataQueues((0, 'shutdown', 'all'))
broadcastToSendDataQueues((0, 'shutdown', 'no data'))
with shared.objectProcessorQueueSizeLock:
data = 'no data'
shared.objectProcessorQueueSize += len(data)