cis-kuldeep/PyBitmessage-2021-04-27
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Do not share or accept IPs which are in the private ranges

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Jonathan Warren 2013-03-25 14:13:56 -04:00
parent 8b0252488e
commit b9b89091dc
1 changed files with 24 additions and 2 deletions
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26
bitmessagemain.py
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@ -329,7 +329,7 @@ class receiveDataThread(QThread):
if self.payloadLength <= 180000000: #If the size of the message is greater than 180MB, ignore it. (I get memory errors when processing messages much larger than this though it is concievable that this value will have to be lowered if some systems are less tolarant of large messages.)
remoteCommand = self.data[4:16]
printLock.acquire()
print 'remoteCommand ', remoteCommand, 'from', self.HOST
print 'remoteCommand', repr(remoteCommand.replace('\x00','')), ' from', self.HOST
printLock.release()
if remoteCommand == 'version\x00\x00\x00\x00\x00':
self.recversion()
@ -1750,6 +1750,12 @@ class receiveDataThread(QThread):
if self.data[52+lengthOfNumberOfAddresses+(34*i)] == '\x7F':
print 'Ignoring IP address in loopback range:', hostFromAddrMessage
continue
if self.data[52+lengthOfNumberOfAddresses+(34*i)] == '\x0A':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
if self.data[52+lengthOfNumberOfAddresses+(34*i):52+lengthOfNumberOfAddresses+(34*i)+2] == '\xC0A8':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
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 is a dictionary of dictionaries with one outer dictionary for each stream. If the outer stream dictionary doesn't exist yet then we must make it.
knownNodes[recaddrStream] = {}
@ -1807,21 +1813,26 @@ class receiveDataThread(QThread):
#print 'knownNodes', knownNodes
#We are going to share a maximum number of 1000 addrs with our peer. 500 from this stream, 250 from the left child stream, and 250 from the right child stream.
if len(knownNodes[self.streamNumber]) > 0:
for i in range(500):
random.seed()
HOST, = random.sample(knownNodes[self.streamNumber], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInMyStream[HOST] = knownNodes[self.streamNumber][HOST]
if len(knownNodes[self.streamNumber*2]) > 0:
for i in range(250):
random.seed()
HOST, = random.sample(knownNodes[self.streamNumber*2], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInChildStreamLeft[HOST] = knownNodes[self.streamNumber*2][HOST]
if len(knownNodes[(self.streamNumber*2)+1]) > 0:
for i in range(250):
random.seed()
HOST, = random.sample(knownNodes[(self.streamNumber*2)+1], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInChildStreamRight[HOST] = knownNodes[(self.streamNumber*2)+1][HOST]
numberOfAddressesInAddrMessage = 0
@ -1971,6 +1982,17 @@ class receiveDataThread(QThread):
if self.verackReceived == True:
self.connectionFullyEstablished()
def isHostInPrivateIPRange(self,host):
if host[:3] == '10.':
return True
if host[:4] == '172.':
if host[6] == '.':
if int(host[4:6]) >= 16 and int(host[4:6]) <= 31:
return True
if host[:8] == '192.168.':
return True
return False
#Every connection to a peer has a sendDataThread (and also a receiveDataThread).
class sendDataThread(QThread):
def __init__(self, parent = None):