citizenaspirant/PyBitmessage
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additional sanity checking in the addr processing function

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Jonathan Warren 2013-03-12 16:03:16 -04:00
parent 3d78ece84e
commit fabd1ffccd
1 changed files with 10 additions and 3 deletions
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13
bitmessagemain.py
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@ -1677,6 +1677,10 @@ class receiveDataThread(QThread):
if numberOfAddressesIncluded > 1000 or numberOfAddressesIncluded == 0: if numberOfAddressesIncluded > 1000 or numberOfAddressesIncluded == 0:
return return
if self.payloadLength < lengthOfNumberOfAddresses + (34 * numberOfAddressesIncluded):
print 'addr message does not contain enough data. Ignoring.'
return
needToWriteKnownNodesToDisk = False needToWriteKnownNodesToDisk = False
for i in range(0,numberOfAddressesIncluded): for i in range(0,numberOfAddressesIncluded):
try: try:
@ -1701,7 +1705,8 @@ class receiveDataThread(QThread):
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrStream). Message: %s\n' % str(err)) sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrStream). Message: %s\n' % str(err))
printLock.release() printLock.release()
break #giving up on unpacking any more. We should still be connected however. break #giving up on unpacking any more. We should still be connected however.
if recaddrStream == 0:
continue
try: try:
recaddrServices, = unpack('>Q',self.data[32+lengthOfNumberOfAddresses+(34*i):40+lengthOfNumberOfAddresses+(34*i)]) recaddrServices, = unpack('>Q',self.data[32+lengthOfNumberOfAddresses+(34*i):40+lengthOfNumberOfAddresses+(34*i)])
except Exception, err: except Exception, err:
@ -1725,10 +1730,12 @@ class receiveDataThread(QThread):
if hostFromAddrMessage == '127.0.0.1': if hostFromAddrMessage == '127.0.0.1':
continue continue
timeSomeoneElseReceivedMessageFromThisNode, = unpack('>I',self.data[24+lengthOfNumberOfAddresses+(34*i):28+lengthOfNumberOfAddresses+(34*i)]) #This is the 'time' value in the received addr message. timeSomeoneElseReceivedMessageFromThisNode, = unpack('>I',self.data[24+lengthOfNumberOfAddresses+(34*i):28+lengthOfNumberOfAddresses+(34*i)]) #This is the 'time' value in the received addr message.
if recaddrStream not in knownNodes:
knownNodes[recaddrStream] = {}
if hostFromAddrMessage not in knownNodes[recaddrStream]: if hostFromAddrMessage not in knownNodes[recaddrStream]:
if len(knownNodes[recaddrStream]) < 20000 and timeSomeoneElseReceivedMessageFromThisNode > (int(time.time())-10800) and timeSomeoneElseReceivedMessageFromThisNode < (int(time.time()) + 10800): #If we have more than 20000 nodes in our list already then just forget about adding more. Also, make sure that the time that someone else received a message from this node is within three hours from now. if len(knownNodes[recaddrStream]) < 20000 and timeSomeoneElseReceivedMessageFromThisNode > (int(time.time())-10800) and timeSomeoneElseReceivedMessageFromThisNode < (int(time.time()) + 10800): #If we have more than 20000 nodes in our list already then just forget about adding more. Also, make sure that the time that someone else received a message from this node is within three hours from now.
knownNodes[recaddrStream][hostFromAddrMessage] = (recaddrPort, timeSomeoneElseReceivedMessageFromThisNode) knownNodes[recaddrStream][hostFromAddrMessage] = (recaddrPort, timeSomeoneElseReceivedMessageFromThisNode)
print 'added new node', hostFromAddrMessage, 'to knownNodes.' print 'added new node', hostFromAddrMessage, 'to knownNodes in stream', recaddrStream
needToWriteKnownNodesToDisk = True needToWriteKnownNodesToDisk = True
hostDetails = (timeSomeoneElseReceivedMessageFromThisNode, recaddrStream, recaddrServices, hostFromAddrMessage, recaddrPort) hostDetails = (timeSomeoneElseReceivedMessageFromThisNode, recaddrStream, recaddrServices, hostFromAddrMessage, recaddrPort)
listOfAddressDetailsToBroadcastToPeers.append(hostDetails) listOfAddressDetailsToBroadcastToPeers.append(hostDetails)
@ -1744,7 +1751,7 @@ class receiveDataThread(QThread):
output.close() output.close()
self.broadcastaddr(listOfAddressDetailsToBroadcastToPeers) self.broadcastaddr(listOfAddressDetailsToBroadcastToPeers)
printLock.acquire() printLock.acquire()
print 'knownNodes currently has', len(knownNodes[recaddrStream]), 'nodes for this stream.' print 'knownNodes currently has', len(knownNodes[self.streamNumber]), 'nodes for this stream.'
printLock.release() printLock.release()
#Function runs when we want to broadcast an addr message to all of our peers. Runs when we learn of nodes that we didn't previously know about and want to share them with our peers. #Function runs when we want to broadcast an addr message to all of our peers. Runs when we learn of nodes that we didn't previously know about and want to share them with our peers.