PyBitmessage-2021-04-27/src/network/connectionpool.py

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import errno
import socket
import time
import random
import re
from bmconfigparser import BMConfigParser
from debug import logger
import helper_bootstrap
from network.proxy import Proxy
import network.bmproto
from network.dandelion import Dandelion
import network.tcp
import network.udp
from network.connectionchooser import chooseConnection
import network.asyncore_pollchoose as asyncore
import protocol
from singleton import Singleton
import state
@Singleton
class BMConnectionPool(object):
def __init__(self):
asyncore.set_rates(
BMConfigParser().safeGetInt("bitmessagesettings", "maxdownloadrate") * 1024,
BMConfigParser().safeGetInt("bitmessagesettings", "maxuploadrate") * 1024)
self.outboundConnections = {}
self.inboundConnections = {}
self.listeningSockets = {}
self.udpSockets = {}
self.streams = []
self.lastSpawned = 0
self.spawnWait = 2
self.bootstrapped = False
def handleReceivedObject(self, streamNumber, hashid, connection = None):
for i in self.inboundConnections.values() + self.outboundConnections.values():
if not isinstance(i, network.bmproto.BMProto):
continue
if not i.fullyEstablished:
continue
try:
with i.objectsNewToMeLock:
del i.objectsNewToMe[hashid]
except KeyError:
with i.objectsNewToThemLock:
i.objectsNewToThem[hashid] = time.time()
if i == connection:
try:
with i.objectsNewToThemLock:
del i.objectsNewToThem[hashid]
except KeyError:
pass
def reRandomiseDandelionStems(self):
# Choose 2 peers randomly
# TODO: handle streams
Dandelion().reRandomiseStems(self.outboundConnections.values())
def connectToStream(self, streamNumber):
self.streams.append(streamNumber)
def getConnectionByAddr(self, addr):
if addr in self.inboundConnections:
return self.inboundConnections[addr]
if addr.host in self.inboundConnections:
return self.inboundConnections[addr.host]
if addr in self.outboundConnections:
return self.outboundConnections[addr]
if addr.host in self.udpSockets:
return self.udpSockets[addr.host]
raise KeyError
def isAlreadyConnected(self, nodeid):
for i in self.inboundConnections.values() + self.outboundConnections.values():
try:
if nodeid == i.nodeid:
return True
except AttributeError:
pass
return False
def addConnection(self, connection):
if isinstance(connection, network.udp.UDPSocket):
return
if connection.isOutbound:
self.outboundConnections[connection.destination] = connection
else:
if connection.destination.host in self.inboundConnections:
self.inboundConnections[connection.destination] = connection
else:
self.inboundConnections[connection.destination.host] = connection
def removeConnection(self, connection):
if isinstance(connection, network.udp.UDPSocket):
del self.udpSockets[connection.listening.host]
elif isinstance(connection, network.tcp.TCPServer):
del self.listeningSockets[state.Peer(connection.destination.host, connection.destination.port)]
elif connection.isOutbound:
try:
del self.outboundConnections[connection.destination]
except KeyError:
pass
else:
try:
del self.inboundConnections[connection.destination]
except KeyError:
try:
del self.inboundConnections[connection.destination.host]
except KeyError:
pass
def getListeningIP(self):
if BMConfigParser().safeGet("bitmessagesettings", "onionhostname").endswith(".onion"):
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host = BMConfigParser().safeGet("bitmessagesettings", "onionbindip")
else:
host = '127.0.0.1'
if BMConfigParser().safeGetBoolean("bitmessagesettings", "sockslisten") or \
BMConfigParser().get("bitmessagesettings", "socksproxytype") == "none":
# python doesn't like bind + INADDR_ANY?
#host = socket.INADDR_ANY
host = BMConfigParser().get("network", "bind")
return host
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def startListening(self, bind=None):
if bind is None:
bind = self.getListeningIP()
port = BMConfigParser().safeGetInt("bitmessagesettings", "port")
# correct port even if it changed
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ls = network.tcp.TCPServer(host=bind, port=port)
self.listeningSockets[ls.destination] = ls
def startUDPSocket(self, bind=None):
if bind is None:
host = self.getListeningIP()
udpSocket = network.udp.UDPSocket(host=host, announcing=True)
else:
if bind is False:
udpSocket = network.udp.UDPSocket(announcing=False)
else:
udpSocket = network.udp.UDPSocket(host=bind, announcing=True)
self.udpSockets[udpSocket.listening.host] = udpSocket
def loop(self):
# defaults to empty loop if outbound connections are maxed
spawnConnections = False
acceptConnections = True
if BMConfigParser().safeGetBoolean('bitmessagesettings', 'dontconnect'):
acceptConnections = False
elif BMConfigParser().safeGetBoolean('bitmessagesettings', 'sendoutgoingconnections'):
spawnConnections = True
if BMConfigParser().get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS' and \
(not BMConfigParser().getboolean('bitmessagesettings', 'sockslisten') and \
".onion" not in BMConfigParser().get('bitmessagesettings', 'onionhostname')):
acceptConnections = False
if spawnConnections:
if not self.bootstrapped:
helper_bootstrap.dns()
self.bootstrapped = True
Proxy.proxy = (BMConfigParser().safeGet("bitmessagesettings", "sockshostname"),
BMConfigParser().safeGetInt("bitmessagesettings", "socksport"))
established = sum(1 for c in self.outboundConnections.values() if (c.connected and c.fullyEstablished))
pending = len(self.outboundConnections) - established
if established < BMConfigParser().safeGetInt("bitmessagesettings", "maxoutboundconnections"):
for i in range(state.maximumNumberOfHalfOpenConnections - pending):
try:
chosen = chooseConnection(random.choice(self.streams))
except ValueError:
continue
if chosen in self.outboundConnections:
continue
if chosen.host in self.inboundConnections:
continue
# don't connect to self
if chosen in state.ownAddresses:
continue
#for c in self.outboundConnections:
# if chosen == c.destination:
# continue
#for c in self.inboundConnections:
# if chosen.host == c.destination.host:
# continue
try:
if (BMConfigParser().safeGet("bitmessagesettings", "socksproxytype") == "SOCKS5"):
self.addConnection(network.tcp.Socks5BMConnection(chosen))
elif (BMConfigParser().safeGet("bitmessagesettings", "socksproxytype") == "SOCKS4a"):
self.addConnection(network.tcp.Socks4aBMConnection(chosen))
elif not chosen.host.endswith(".onion"):
self.addConnection(network.tcp.TCPConnection(chosen))
except socket.error as e:
if e.errno == errno.ENETUNREACH:
continue
self.lastSpawned = time.time()
if acceptConnections:
if not self.listeningSockets:
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if BMConfigParser().safeGet("network", "bind") == '':
self.startListening()
else:
for bind in re.sub("[^\w.]+", " ", BMConfigParser().safeGet("network", "bind")).split():
self.startListening(bind)
logger.info('Listening for incoming connections.')
if not self.udpSockets:
if BMConfigParser().safeGet("network", "bind") == '':
self.startUDPSocket()
else:
for bind in re.sub("[^\w.]+", " ", BMConfigParser().safeGet("network", "bind")).split():
self.startUDPSocket(bind)
self.startUDPSocket(False)
logger.info('Starting UDP socket(s).')
else:
if self.listeningSockets:
for i in self.listeningSockets.values():
i.handle_close()
logger.info('Stopped listening for incoming connections.')
if self.udpSockets:
for i in self.udpSockets.values():
i.handle_close()
logger.info('Stopped udp sockets.')
loopTime = float(self.spawnWait)
if self.lastSpawned < time.time() - self.spawnWait:
loopTime = 2.0
asyncore.loop(timeout=loopTime, count=1000)
reaper = []
for i in self.inboundConnections.values() + self.outboundConnections.values():
minTx = time.time() - 20
if i.fullyEstablished:
minTx -= 300 - 20
if i.lastTx < minTx:
if i.fullyEstablished:
i.append_write_buf(protocol.CreatePacket('ping'))
else:
i.close_reason = "Timeout (%is)" % (time.time() - i.lastTx)
i.handle_close()
for i in self.inboundConnections.values() + self.outboundConnections.values() + self.listeningSockets.values() + self.udpSockets.values():
if i.state == "close":
i.handle_close()
if not (i.accepting or i.connecting or i.connected):
reaper.append(i)
for i in reaper:
self.removeConnection(i)