cis-kuldeep/PyBitmessage-2021-04-27
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Asyncore update

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- get rid of per-connection writeQueue/receiveQueue, and instead use
strings and locking
- minor code cleanup
- all state handlers now should set expectBytes
- almost all data processing happens in ReceiveDataThread, and
AsyncoreThread is almost only I/O (plus TLS). AsyncoreThread simply
puts the connection object into the queue when it has some data for
processing
- allow poll, epoll and kqueue handlers. kqueue is untested and
unoptimised, poll and epoll seem to work ok (linux)
- stack depth threshold handler  in decode_payload_content, this is
recursive and I think was causing occasional RuntimeErrors. Fixes #964
- longer asyncore loops, as now data is handled in ReceiveDataThread
- randomise node order when deciding what to download. Should prevent
retries being stuck to the same node
- socks cleanup (socks5 works ok, socks4a untested but should work too)
This commit is contained in:
Peter Šurda 2017-07-06 19:45:36 +02:00
parent a2b8867c1a
commit ba4162d7fe
Signed by untrusted user: PeterSurda
GPG Key ID: 0C5F50C0B5F37D87
14 changed files with 257 additions and 274 deletions
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60
src/network/advanceddispatcher.py
View File

@ -1,6 +1,7 @@
import Queue
import socket
import sys
import threading
import time
import asyncore_pollchoose as asyncore
@ -14,41 +15,43 @@ class AdvancedDispatcher(asyncore.dispatcher):
asyncore.dispatcher.__init__(self, sock)
self.read_buf = b""
self.write_buf = b""
self.writeQueue = Queue.Queue()
self.receiveQueue = Queue.Queue()
self.state = "init"
self.lastTx = time.time()
self.sentBytes = 0
self.receivedBytes = 0
self.expectBytes = 0
self.readLock = threading.RLock()
self.writeLock = threading.RLock()
def append_write_buf(self, data):
if data:
with self.writeLock:
self.write_buf += data
def slice_write_buf(self, length=0):
if length > 0:
with self.writeLock:
self.write_buf = self.write_buf[length:]
def slice_read_buf(self, length=0):
if length > 0:
with self.readLock:
self.read_buf = self.read_buf[length:]
def read_buf_sufficient(self, length=0):
if len(self.read_buf) < length:
return False
return True
def process(self):
if self.state != "tls_handshake" and not self.read_buf:
return
if not self.connected:
return
maxLoop = 20
while maxLoop > 0:
loop = 0
while len(self.read_buf) >= self.expectBytes:
loop += 1
if loop > 1000:
logger.error("Stuck at state %s, report this bug please", self.state)
break
try:
if getattr(self, "state_" + str(self.state))() is False:
break
except AttributeError:
# missing state
raise
maxLoop -= 1
def set_state(self, state, length=0, expectBytes=0):
self.expectBytes = expectBytes
@ -57,7 +60,7 @@ class AdvancedDispatcher(asyncore.dispatcher):
def writable(self):
return asyncore.dispatcher.writable(self) and \
(self.connecting or len(self.write_buf) > 0 or not self.writeQueue.empty())
(self.connecting or self.write_buf)
def readable(self):
return asyncore.dispatcher.readable(self) and \
@ -68,28 +71,20 @@ class AdvancedDispatcher(asyncore.dispatcher):
downloadBytes = AdvancedDispatcher._buf_len
if asyncore.maxDownloadRate > 0:
downloadBytes = asyncore.downloadBucket
if self.expectBytes > 0 and downloadBytes > self.expectBytes:
downloadBytes = self.expectBytes
if self.expectBytes > 0 and downloadBytes > self.expectBytes - len(self.read_buf):
downloadBytes = self.expectBytes - len(self.read_buf)
if downloadBytes > 0:
newData = self.recv(downloadBytes)
self.receivedBytes += len(newData)
if self.expectBytes > 0:
self.expectBytes -= len(newData)
asyncore.update_received(len(newData))
with self.readLock:
self.read_buf += newData
self.process()
def handle_write(self):
self.lastTx = time.time()
bufSize = AdvancedDispatcher._buf_len
if asyncore.maxUploadRate > 0:
bufSize = asyncore.uploadBucket
while len(self.write_buf) < bufSize:
try:
self.write_buf += self.writeQueue.get(False)
self.writeQueue.task_done()
except Queue.Empty:
break
if bufSize <= 0:
return
if self.write_buf:
@ -107,25 +102,12 @@ class AdvancedDispatcher(asyncore.dispatcher):
def handle_connect(self):
self.lastTx = time.time()
self.process()
def state_close(self):
pass
return False
def handle_close(self):
self.read_buf = b""
self.write_buf = b""
self.state = "close"
while True:
try:
self.writeQueue.get(False)
self.writeQueue.task_done()
except Queue.Empty:
break
while True:
try:
self.receiveQueue.get(False)
self.receiveQueue.task_done()
except Queue.Empty:
break
asyncore.dispatcher.close(self)

2
src/network/announcethread.py
View File

@ -30,4 +30,4 @@ class AnnounceThread(threading.Thread, StoppableThread):
for connection in BMConnectionPool().udpSockets.values():
for stream in state.streamsInWhichIAmParticipating:
addr = (stream, state.Peer('127.0.0.1', BMConfigParser().safeGetInt("bitmessagesettings", "port")), time.time())
connection.writeQueue.put(BMProto.assembleAddr([addr]))
connection.append_write_buf(BMProto.assembleAddr([addr]))

34
src/network/asyncore_pollchoose.py
View File

@ -249,13 +249,16 @@ def poll_poller(timeout=0.0, map=None):
newflags |= OP_WRITE
else:
newflags &= ~ OP_WRITE
if newflags != obj.flags:
obj.flags = newflags
if newflags != obj.poller_flags:
obj.poller_flags = newflags
try:
if obj.poller_registered:
poll_poller.pollster.modify(fd, flags)
else:
poll_poller.pollster.register(fd, flags)
obj.poller_registered = True
except IOError:
pass
try:
r = poll_poller.pollster.poll(timeout)
except KeyboardInterrupt:
@ -292,16 +295,19 @@ def epoll_poller(timeout=0.0, map=None):
newflags |= OP_WRITE
else:
newflags &= ~ OP_WRITE
if newflags != obj.flags:
obj.flags = newflags
if newflags != obj.poller_flags:
obj.poller_flags = newflags
# Only check for exceptions if object was either readable
# or writable.
flags |= select.POLLERR | select.POLLHUP | select.POLLNVAL
try:
if obj.poller_registered:
epoll_poller.pollster.modify(fd, flags)
else:
epoll_poller.pollster.register(fd, flags)
obj.poller_registered = True
except IOError:
pass
try:
r = epoll_poller.pollster.poll(timeout)
except select.error, err:
@ -329,9 +335,12 @@ def kqueue_poller(timeout=0.0, map=None):
if obj.writable():
filter |= select.KQ_FILTER_WRITE
if filter:
try:
ev = select.kevent(fd, filter=filter, flags=flags)
kqueue.control([ev], 0)
selectables += 1
except IOError:
pass
events = kqueue.control(None, selectables, timeout)
for event in random.sample(events, len(events)):
@ -347,13 +356,15 @@ def kqueue_poller(timeout=0.0, map=None):
def loop(timeout=30.0, use_poll=False, map=None, count=None,
poller=select_poller):
poller=None):
if map is None:
map = socket_map
# code which grants backward compatibility with "use_poll"
# argument which should no longer be used in favor of
# "poller"
if poller is None:
if hasattr(select, 'epoll'):
poller = epoll_poller
elif hasattr(select, 'kqueue'):
@ -363,10 +374,6 @@ def loop(timeout=30.0, use_poll=False, map=None, count=None,
elif hasattr(select, 'select'):
poller = select_poller
poller = select_poller
# print "Poll loop using %s" % (poller.__name__)
if count is None:
while map:
# fill buckets first
@ -400,7 +407,7 @@ class dispatcher:
addr = None
ignore_log_types = frozenset(['warning'])
poller_registered = False
flags = 0
poller_flags = 0
# don't do network IO with a smaller bucket than this
minTx = 1500
@ -456,23 +463,26 @@ class dispatcher:
if map is None:
map = self._map
map[self._fileno] = self
self.poller_flags = 0
def del_channel(self, map=None):
fd = self._fileno
if map is None:
map = self._map
self.poller_flags = 0
self.poller_registered = False
if fd in map:
#self.log_info('closing channel %d:%s' % (fd, self))
del map[fd]
self._fileno = None
try:
epoll_poller.pollster.unregister(fd)
except (AttributeError, KeyError, TypeError):
except (AttributeError, KeyError, TypeError, IOError):
# no epoll used, or not registered
pass
try:
poll_poller.pollster.unregister(fd)
except (AttributeError, KeyError, TypeError):
except (AttributeError, KeyError, TypeError, IOError):
# no poll used, or not registered
pass

63
src/network/bmproto.py
View File

@ -5,6 +5,7 @@ import math
import time
import socket
import struct
import sys
from addresses import calculateInventoryHash
from bmconfigparser import BMConfigParser
@ -67,15 +68,12 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
self.object = None
def state_bm_header(self):
if len(self.read_buf) < protocol.Header.size:
#print "Length below header size"
return False
self.magic, self.command, self.payloadLength, self.checksum = protocol.Header.unpack(self.read_buf[:protocol.Header.size])
self.command = self.command.rstrip('\x00')
if self.magic != 0xE9BEB4D9:
# skip 1 byte in order to sync
self.set_state("bm_header", length=1)
self.bm_proto_reset()
self.set_state("bm_header", length=1, expectBytes=protocol.Header.size)
logger.debug("Bad magic")
self.handle_close("Bad magic")
return False
@ -85,10 +83,6 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
return True
def state_bm_command(self):
if len(self.read_buf) < self.payloadLength:
#print "Length below announced object length"
return False
#logger.debug("%s:%i: command %s (%ib)", self.destination.host, self.destination.port, self.command, self.payloadLength)
self.payload = self.read_buf[:self.payloadLength]
if self.checksum != hashlib.sha512(self.payload).digest()[0:4]:
logger.debug("Bad checksum, ignoring")
@ -127,7 +121,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
self.handle_close("Invalid command %s" % (self.command))
return False
if retval:
self.set_state("bm_header", length=self.payloadLength, expectBytes=protocol.Header.size)
self.set_state("bm_header", length=self.payloadLength)
self.bm_proto_reset()
# else assume the command requires a different state to follow
return True
@ -173,6 +167,12 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
retval = []
size = None
i = 0
try:
sys._getframe(200)
logger.error("Stack depth warning, pattern: %s", pattern)
return
except ValueError:
pass
while i < len(pattern):
if pattern[i] in "0123456789" and (i == 0 or pattern[i-1] not in "lL"):
@ -237,8 +237,13 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
# skip?
if time.time() < self.skipUntil:
return True
#TODO make this more asynchronous and allow reordering
for i in items:
self.receiveQueue.put(("object", i))
try:
self.append_write_buf(protocol.CreatePacket('object', Inventory()[i].payload))
except KeyError:
self.antiIntersectionDelay()
logger.info('%s asked for an object we don\'t have.', self.destination)
return True
def bm_command_inv(self):
@ -251,7 +256,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
pass
for i in items:
self.receiveQueue.put(("inv", i))
self.handleReceivedInventory(i)
return True
@ -321,7 +326,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
return True
def bm_command_ping(self):
self.writeQueue.put(protocol.CreatePacket('pong'))
self.append_write_buf(protocol.CreatePacket('pong'))
return True
def bm_command_pong(self):
@ -332,11 +337,10 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
self.verackReceived = True
if self.verackSent:
if self.isSSL:
self.set_state("tls_init", self.payloadLength)
self.bm_proto_reset()
self.set_state("tls_init", length=self.payloadLength, expectBytes=0)
return False
self.set_state("connection_fully_established", length=self.payloadLength, expectBytes=0)
return False
self.set_connection_fully_established()
return True
return True
def bm_command_version(self):
@ -345,20 +349,20 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
self.nonce = struct.pack('>Q', self.nonce)
self.timeOffset = self.timestamp - int(time.time())
logger.debug("remoteProtocolVersion: %i", self.remoteProtocolVersion)
logger.debug("services: %08X", self.services)
logger.debug("services: 0x%08X", self.services)
logger.debug("time offset: %i", self.timestamp - int(time.time()))
logger.debug("my external IP: %s", self.sockNode.host)
logger.debug("remote node incoming port: %i", self.peerNode.port)
logger.debug("remote node incoming address: %s:%i", self.destination.host, self.peerNode.port)
logger.debug("user agent: %s", self.userAgent)
logger.debug("streams: [%s]", ",".join(map(str,self.streams)))
if not self.peerValidityChecks():
# TODO ABORT
return True
#shared.connectedHostsList[self.destination] = self.streams[0]
self.writeQueue.put(protocol.CreatePacket('verack'))
self.append_write_buf(protocol.CreatePacket('verack'))
self.verackSent = True
if not self.isOutbound:
self.writeQueue.put(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
network.connectionpool.BMConnectionPool().streams, True))
#print "%s:%i: Sending version" % (self.destination.host, self.destination.port)
if ((self.services & protocol.NODE_SSL == protocol.NODE_SSL) and
@ -366,29 +370,28 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
self.isSSL = True
if self.verackReceived:
if self.isSSL:
self.set_state("tls_init", self.payloadLength)
self.bm_proto_reset()
self.set_state("tls_init", length=self.payloadLength, expectBytes=0)
return False
self.set_state("connection_fully_established", length=self.payloadLength, expectBytes=0)
return False
self.set_connection_fully_established()
return True
return True
def peerValidityChecks(self):
if self.remoteProtocolVersion < 3:
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="Your is using an old protocol. Closing connection."))
logger.debug ('Closing connection to old protocol version %s, node: %s',
str(self.remoteProtocolVersion), str(self.destination))
return False
if self.timeOffset > BMProto.maxTimeOffset:
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="Your time is too far in the future compared to mine. Closing connection."))
logger.info("%s's time is too far in the future (%s seconds). Closing connection to it.",
self.destination, self.timeOffset)
shared.timeOffsetWrongCount += 1
return False
elif self.timeOffset < -BMProto.maxTimeOffset:
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="Your time is too far in the past compared to mine. Closing connection."))
logger.info("%s's time is too far in the past (timeOffset %s seconds). Closing connection to it.",
self.destination, self.timeOffset)
@ -397,7 +400,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
else:
shared.timeOffsetWrongCount = 0
if not self.streams:
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="We don't have shared stream interests. Closing connection."))
logger.debug ('Closed connection to %s because there is no overlapping interest in streams.',
str(self.destination))
@ -405,7 +408,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
if self.destination in network.connectionpool.BMConnectionPool().inboundConnections:
try:
if not protocol.checkSocksIP(self.destination.host):
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="Too many connections from your IP. Closing connection."))
logger.debug ('Closed connection to %s because we are already connected to that IP.',
str(self.destination))
@ -413,7 +416,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
except:
pass
if self.nonce == protocol.eightBytesOfRandomDataUsedToDetectConnectionsToSelf:
self.writeQueue.put(protocol.assembleErrorMessage(fatal=2,
self.append_write_buf(protocol.assembleErrorMessage(fatal=2,
errorText="I'm connected to myself. Closing connection."))
logger.debug ("Closed connection to %s because I'm connected to myself.",
str(self.destination))

11
src/network/connectionpool.py
View File

@ -19,7 +19,6 @@ import state
@Singleton
class BMConnectionPool(object):
def __init__(self):
asyncore.set_rates(
BMConfigParser().safeGetInt("bitmessagesettings", "maxdownloadrate") * 1024,
@ -30,7 +29,7 @@ class BMConnectionPool(object):
self.udpSockets = {}
self.streams = []
self.lastSpawned = 0
self.spawnWait = 0.3
self.spawnWait = 2
self.bootstrapped = False
def handleReceivedObject(self, streamNumber, hashid, connection = None):
@ -187,12 +186,10 @@ class BMConnectionPool(object):
i.handle_close()
logger.info('Stopped udp sockets.')
# while len(asyncore.socket_map) > 0 and state.shutdown == 0:
# print "loop, state = %s" % (proxy.state)
loopTime = float(self.spawnWait)
if self.lastSpawned < time.time() - self.spawnWait:
loopTime = 1.0
asyncore.loop(timeout=loopTime, count=10)
loopTime = 2.0
asyncore.loop(timeout=loopTime, count=1000)
reaper = []
for i in self.inboundConnections.values() + self.outboundConnections.values():
@ -201,7 +198,7 @@ class BMConnectionPool(object):
minTx -= 300 - 20
if i.lastTx < minTx:
if i.fullyEstablished:
i.writeQueue.put(protocol.CreatePacket('ping'))
i.append_write_buf(protocol.CreatePacket('ping'))
else:
i.handle_close("Timeout (%is)" % (time.time() - i.lastTx))
for i in self.inboundConnections.values() + self.outboundConnections.values() + self.listeningSockets.values() + self.udpSockets.values():

8
src/network/downloadthread.py
View File

@ -1,3 +1,4 @@
import random
import threading
import time
@ -32,7 +33,10 @@ class DownloadThread(threading.Thread, StoppableThread):
def run(self):
while not self._stopped:
requested = 0
for i in BMConnectionPool().inboundConnections.values() + BMConnectionPool().outboundConnections.values():
# Choose downloading peers randomly
connections = BMConnectionPool().inboundConnections.values() + BMConnectionPool().outboundConnections.values()
random.shuffle(connections)
for i in connections:
now = time.time()
timedOut = now - DownloadThread.requestTimeout
# this may take a while, but it needs a consistency so I think it's better to lock a bigger chunk
@ -52,7 +56,7 @@ class DownloadThread(threading.Thread, StoppableThread):
self.pending[k] = now
payload = addresses.encodeVarint(len(request)) + ''.join(request)
i.writeQueue.put(protocol.CreatePacket('getdata', payload))
i.append_write_buf(protocol.CreatePacket('getdata', payload))
logger.debug("%s:%i Requesting %i objects", i.destination.host, i.destination.port, len(request))
requested += len(request)
if time.time() >= self.lastCleaned + DownloadThread.cleanInterval:

2
src/network/invthread.py
View File

@ -42,7 +42,7 @@ class InvThread(threading.Thread, StoppableThread):
except KeyError:
continue
if hashes:
connection.writeQueue.put(protocol.CreatePacket('inv', \
connection.append_write_buf(protocol.CreatePacket('inv', \
addresses.encodeVarint(len(hashes)) + "".join(hashes)))
invQueue.iterate()
self.stop.wait(1)

71
src/network/receivequeuethread.py
View File

@ -10,6 +10,7 @@ from helper_threading import StoppableThread
from inventory import Inventory
from network.connectionpool import BMConnectionPool
from network.bmproto import BMProto
from queues import receiveDataQueue
import protocol
import state
@ -21,73 +22,23 @@ class ReceiveQueueThread(threading.Thread, StoppableThread):
logger.info("init receive queue thread")
def run(self):
lastprinted = int(time.time())
while not self._stopped and state.shutdown == 0:
if lastprinted < int(time.time()):
lastprinted = int(time.time())
# try:
# sys._getframe(200)
# logger.error("Stack depth warning")
# except ValueError:
# pass
processed = 0
for i in BMConnectionPool().inboundConnections.values() + BMConnectionPool().outboundConnections.values():
if self._stopped:
break
try:
command, args = i.receiveQueue.get(False)
connection = receiveDataQueue.get(block=True, timeout=1)
receiveDataQueue.task_done()
except Queue.Empty:
continue
processed += 1
if self._stopped:
break
# cycle as long as there is data
# methods should return False if there isn't enough data, or the connection is to be aborted
try:
getattr(self, "command_" + str(command))(i, args)
i.receiveQueue.task_done()
while connection.process():
pass
except AttributeError:
i.receiveQueue.task_done()
# missing command
raise
if processed == 0:
self.stop.wait(2)
def command_object(self, connection, objHash):
try:
connection.writeQueue.put(protocol.CreatePacket('object', Inventory()[objHash].payload))
except KeyError:
connection.antiIntersectionDelay()
logger.info('%s asked for an object we don\'t have.', connection.destination)
def command_biginv(self, connection, dummy):
def sendChunk():
if objectCount == 0:
return
logger.debug('Sending huge inv message with %i objects to just this one peer', objectCount)
connection.writeQueue.put(protocol.CreatePacket('inv', addresses.encodeVarint(objectCount) + payload))
# Select all hashes for objects in this stream.
bigInvList = {}
for stream in connection.streams:
# may lock for a long time, but I think it's better than thousands of small locks
with connection.objectsNewToThemLock:
for objHash in Inventory().unexpired_hashes_by_stream(stream):
bigInvList[objHash] = 0
connection.objectsNewToThem[objHash] = time.time()
objectCount = 0
payload = b''
# Now let us start appending all of these hashes together. They will be
# sent out in a big inv message to our new peer.
for hash, storedValue in bigInvList.items():
payload += hash
objectCount += 1
if objectCount >= BMProto.maxObjectCount:
self.sendChunk()
payload = b''
objectCount = 0
# flush
sendChunk()
def command_inv(self, connection, hashId):
connection.handleReceivedInventory(hashId)
logger.error("Unknown state %s, ignoring", connection.state)
def stopThread(self):
super(ReceiveQueueThread, self).stopThread()

41
src/network/socks4a.py
View File

@ -19,10 +19,9 @@ class Socks4a(Proxy):
def state_init(self):
self.set_state("auth_done", 0)
return True
def state_pre_connect(self):
if not self.read_buf_sufficient(8):
return False
# Get the response
if self.read_buf[0:1] != chr(0x00).encode():
# bad data
@ -44,14 +43,12 @@ class Socks4a(Proxy):
self.__proxypeername = (socket.inet_ntoa(self.ipaddr), self.destination[1])
else:
self.__proxypeername = (self.destination[0], self.destport)
self.set_state("proxy_handshake_done", 8)
self.set_state("proxy_handshake_done", length=8)
return True
def proxy_sock_name(self):
return socket.inet_ntoa(self.__proxysockname[0])
def state_socks_handshake_done(self):
return False
class Socks4aConnection(Socks4a):
def __init__(self, address):
@ -60,33 +57,34 @@ class Socks4aConnection(Socks4a):
def state_auth_done(self):
# Now we can request the actual connection
rmtrslv = False
self.writeQueue.put(struct.pack('>BBH', 0x04, 0x01, self.destination[1]))
self.append_write_buf(struct.pack('>BBH', 0x04, 0x01, self.destination[1]))
# If the given destination address is an IP address, we'll
# use the IPv4 address request even if remote resolving was specified.
try:
self.ipaddr = socket.inet_aton(self.destination[0])
self.writeQueue.put(self.ipaddr)
self.append_write_buf(self.ipaddr)
except socket.error:
# Well it's not an IP number, so it's probably a DNS name.
if Proxy._remote_dns:
# Resolve remotely
rmtrslv = True
self.ipaddr = None
self.writeQueue.put(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
self.append_write_buf(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
else:
# Resolve locally
self.ipaddr = socket.inet_aton(socket.gethostbyname(self.destination[0]))
self.writeQueue.put(self.ipaddr)
self.append_write_buf(self.ipaddr)
if self._auth:
self.writeQueue.put(self._auth[0])
self.writeQueue.put(chr(0x00).encode())
self.append_write_buf(self._auth[0])
self.append_write_buf(chr(0x00).encode())
if rmtrslv:
self.writeQueue.put(self.destination[0] + chr(0x00).encode())
self.set_state("pre_connect", 0)
self.append_write_buf(self.destination[0] + chr(0x00).encode())
self.set_state("pre_connect", length=0, expectBytes=8)
return True
def state_pre_connect(self):
try:
Socks4a.state_pre_connect(self)
return Socks4a.state_pre_connect(self)
except Socks4aError as e:
self.handle_close(e.message)
@ -99,13 +97,14 @@ class Socks4aResolver(Socks4a):
def state_auth_done(self):
# Now we can request the actual connection
self.writeQueue.put(struct.pack('>BBH', 0x04, 0xF0, self.destination[1]))
self.writeQueue.put(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
self.append_write_buf(struct.pack('>BBH', 0x04, 0xF0, self.destination[1]))
self.append_write_buf(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
if self._auth:
self.writeQueue.put(self._auth[0])
self.writeQueue.put(chr(0x00).encode())
self.writeQueue.put(self.host + chr(0x00).encode())
self.set_state("pre_connect", 0)
self.append_write_buf(self._auth[0])
self.append_write_buf(chr(0x00).encode())
self.append_write_buf(self.host + chr(0x00).encode())
self.set_state("pre_connect", length=0, expectBytes=8)
return True
def resolved(self):
print "Resolved %s as %s" % (self.host, self.proxy_sock_name())

77
src/network/socks5.py
View File

@ -32,28 +32,26 @@ class Socks5(Proxy):
def state_init(self):
if self._auth:
self.writeQueue.put(struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02))
self.append_write_buf(struct.pack('BBBB', 0x05, 0x02, 0x00, 0x02))
else:
self.writeQueue.put(struct.pack('BBB', 0x05, 0x01, 0x00))
self.set_state("auth_1", 0)
self.append_write_buf(struct.pack('BBB', 0x05, 0x01, 0x00))
self.set_state("auth_1", length=0, expectBytes=2)
return True
def state_auth_1(self):
if not self.read_buf_sufficient(2):
return False
ret = struct.unpack('BB', self.read_buf)
self.read_buf = self.read_buf[2:]
if ret[0] != 5:
# general error
raise GeneralProxyError(1)
elif ret[1] == 0:
# no auth required
self.set_state("auth_done", 2)
self.set_state("auth_done", length=2)
elif ret[1] == 2:
# username/password
self.writeQueue.put(struct.pack('BB', 1, len(self._auth[0])) + \
self.append_write_buf(struct.pack('BB', 1, len(self._auth[0])) + \
self._auth[0] + struct.pack('B', len(self._auth[1])) + \
self._auth[1])
self.set_state("auth_needed", 2)
self.set_state("auth_needed", length=2, expectBytes=2)
else:
if ret[1] == 0xff:
# auth error
@ -61,11 +59,10 @@ class Socks5(Proxy):
else:
# other error
raise GeneralProxyError(1)
return True
def state_auth_needed(self):
if not self.read_buf_sufficient(2):
return False
ret = struct.unpack('BB', self.read_buf)
ret = struct.unpack('BB', self.read_buf[0:2])
if ret[0] != 1:
# general error
raise GeneralProxyError(1)
@ -73,11 +70,10 @@ class Socks5(Proxy):
# auth error
raise Socks5AuthError(3)
# all ok
self.set_state = ("auth_done", 2)
self.set_state("auth_done", length=2)
return True
def state_pre_connect(self):
if not self.read_buf_sufficient(4):
return False
# Get the response
if self.read_buf[0:1] != chr(0x05).encode():
self.close()
@ -91,41 +87,38 @@ class Socks5(Proxy):
raise Socks5Error(9)
# Get the bound address/port
elif self.read_buf[3:4] == chr(0x01).encode():
self.set_state("proxy_addr_1", 4)
self.set_state("proxy_addr_1", length=4, expectBytes=4)
elif self.read_buf[3:4] == chr(0x03).encode():
self.set_state("proxy_addr_2_1", 4)
self.set_state("proxy_addr_2_1", length=4, expectBytes=1)
else:
self.close()
raise GeneralProxyError(1)
return True
def state_proxy_addr_1(self):
if not self.read_buf_sufficient(4):
return False
self.boundaddr = self.read_buf[0:4]
self.set_state("proxy_port", 4)
self.set_state("proxy_port", length=4, expectBytes=2)
return True
def state_proxy_addr_2_1(self):
if not self.read_buf_sufficient(1):
return False
self.address_length = ord(self.read_buf[0:1])
self.set_state("proxy_addr_2_2", 1)
self.set_state("proxy_addr_2_2", length=1, expectBytes=self.address_length)
return True
def state_proxy_addr_2_2(self):
if not self.read_buf_sufficient(self.address_length):
return False
self.boundaddr = self.read_buf
self.set_state("proxy_port", self.address_length)
self.boundaddr = self.read_buf[0:self.address_length]
self.set_state("proxy_port", length=self.address_length, expectBytes=2)
return True
def state_proxy_port(self):
if not self.read_buf_sufficient(2):
return False
self.boundport = struct.unpack(">H", self.read_buf[0:2])[0]
self.__proxysockname = (self.boundaddr, self.boundport)
if self.ipaddr is not None:
self.__proxypeername = (socket.inet_ntoa(self.ipaddr), self.destination[1])
else:
self.__proxypeername = (self.destination[0], self.destport)
self.set_state("proxy_handshake_done", 2)
self.set_state("proxy_handshake_done", length=2)
return True
def proxy_sock_name(self):
return socket.inet_ntoa(self.__proxysockname[0])
@ -137,28 +130,29 @@ class Socks5Connection(Socks5):
def state_auth_done(self):
# Now we can request the actual connection
self.writeQueue.put(struct.pack('BBB', 0x05, 0x01, 0x00))
self.append_write_buf(struct.pack('BBB', 0x05, 0x01, 0x00))
# If the given destination address is an IP address, we'll
# use the IPv4 address request even if remote resolving was specified.
try:
self.ipaddr = socket.inet_aton(self.destination[0])
self.writeQueue.put(chr(0x01).encode() + self.ipaddr)
self.append_write_buf(chr(0x01).encode() + self.ipaddr)
except socket.error:
# Well it's not an IP number, so it's probably a DNS name.
if Proxy._remote_dns:
# Resolve remotely
self.ipaddr = None
self.writeQueue.put(chr(0x03).encode() + chr(len(self.destination[0])).encode() + self.destination[0])
self.append_write_buf(chr(0x03).encode() + chr(len(self.destination[0])).encode() + self.destination[0])
else:
# Resolve locally
self.ipaddr = socket.inet_aton(socket.gethostbyname(self.destination[0]))
self.writeQueue.put(chr(0x01).encode() + self.ipaddr)
self.writeQueue.put(struct.pack(">H", self.destination[1]))
self.set_state("pre_connect", 0)
self.append_write_buf(chr(0x01).encode() + self.ipaddr)
self.append_write_buf(struct.pack(">H", self.destination[1]))
self.set_state("pre_connect", length=0, expectBytes=4)
return True
def state_pre_connect(self):
try:
Socks5.state_pre_connect(self)
return Socks5.state_pre_connect(self)
except Socks5Error as e:
self.handle_close(e.message)
@ -171,10 +165,11 @@ class Socks5Resolver(Socks5):
def state_auth_done(self):
# Now we can request the actual connection
self.writeQueue.put(struct.pack('BBB', 0x05, 0xF0, 0x00))
self.writeQueue.put(chr(0x03).encode() + chr(len(self.host)).encode() + str(self.host))
self.writeQueue.put(struct.pack(">H", self.port))
self.set_state("pre_connect", 0)
self.append_write_buf(struct.pack('BBB', 0x05, 0xF0, 0x00))
self.append_write_buf(chr(0x03).encode() + chr(len(self.host)).encode() + str(self.host))
self.append_write_buf(struct.pack(">H", self.port))
self.set_state("pre_connect", length=0, expectBytes=4)
return True
def resolved(self):
print "Resolved %s as %s" % (self.host, self.proxy_sock_name())

51
src/network/tcp.py
View File

@ -29,7 +29,7 @@ from network.tls import TLSDispatcher
import addresses
from bmconfigparser import BMConfigParser
from queues import invQueue, objectProcessorQueue, portCheckerQueue, UISignalQueue
from queues import invQueue, objectProcessorQueue, portCheckerQueue, UISignalQueue, receiveDataQueue
import shared
import state
import protocol
@ -91,6 +91,12 @@ class TCPConnection(BMProto, TLSDispatcher):
logger.debug("Skipping processing getdata due to missing object for %.2fs", self.skipUntil - time.time())
self.skipUntil = time.time() + delay
def state_connection_fully_established(self):
self.set_connection_fully_established()
self.set_state("bm_header")
self.bm_proto_reset()
return True
def set_connection_fully_established(self):
if not self.isOutbound and not self.local:
shared.clientHasReceivedIncomingConnections = True
@ -144,10 +150,37 @@ class TCPConnection(BMProto, TLSDispatcher):
for peer, params in addrs[substream]:
templist.append((substream, peer, params["lastseen"]))
if len(templist) > 0:
self.writeQueue.put(BMProto.assembleAddr(templist))
self.append_write_buf(BMProto.assembleAddr(templist))
def sendBigInv(self):
self.receiveQueue.put(("biginv", None))
def sendChunk():
if objectCount == 0:
return
logger.debug('Sending huge inv message with %i objects to just this one peer', objectCount)
self.append_write_buf(protocol.CreatePacket('inv', addresses.encodeVarint(objectCount) + payload))
# Select all hashes for objects in this stream.
bigInvList = {}
for stream in self.streams:
# may lock for a long time, but I think it's better than thousands of small locks
with self.objectsNewToThemLock:
for objHash in Inventory().unexpired_hashes_by_stream(stream):
bigInvList[objHash] = 0
self.objectsNewToThem[objHash] = time.time()
objectCount = 0
payload = b''
# Now let us start appending all of these hashes together. They will be
# sent out in a big inv message to our new peer.
for hash, storedValue in bigInvList.items():
payload += hash
objectCount += 1
if objectCount >= BMProto.maxObjectCount:
self.sendChunk()
payload = b''
objectCount = 0
# flush
sendChunk()
def handle_connect(self):
try:
@ -156,9 +189,10 @@ class TCPConnection(BMProto, TLSDispatcher):
if e.errno in asyncore._DISCONNECTED:
logger.debug("%s:%i: Connection failed: %s" % (self.destination.host, self.destination.port, str(e)))
return
self.writeQueue.put(protocol.assembleVersionMessage(self.destination.host, self.destination.port, network.connectionpool.BMConnectionPool().streams, False))
self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, network.connectionpool.BMConnectionPool().streams, False))
#print "%s:%i: Sending version" % (self.destination.host, self.destination.port)
self.connectedAt = time.time()
receiveDataQueue.put(self)
def handle_read(self):
TLSDispatcher.handle_read(self)
@ -169,6 +203,7 @@ class TCPConnection(BMProto, TLSDispatcher):
knownnodes.knownNodes[s][self.destination]["lastseen"] = time.time()
except KeyError:
pass
receiveDataQueue.put(self)
def handle_write(self):
TLSDispatcher.handle_write(self)
@ -187,10 +222,10 @@ class Socks5BMConnection(Socks5Connection, TCPConnection):
def state_proxy_handshake_done(self):
Socks5Connection.state_proxy_handshake_done(self)
self.writeQueue.put(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
network.connectionpool.BMConnectionPool().streams, False))
self.set_state("bm_header", expectBytes=protocol.Header.size)
return False
return True
class Socks4aBMConnection(Socks4aConnection, TCPConnection):
@ -201,10 +236,10 @@ class Socks4aBMConnection(Socks4aConnection, TCPConnection):
def state_proxy_handshake_done(self):
Socks4aConnection.state_proxy_handshake_done(self)
self.writeQueue.put(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
self.append_write_buf(protocol.assembleVersionMessage(self.destination.host, self.destination.port, \
network.connectionpool.BMConnectionPool().streams, False))
self.set_state("bm_header", expectBytes=protocol.Header.size)
return False
return True
class TCPServer(AdvancedDispatcher):

36
src/network/tls.py
View File

@ -10,6 +10,7 @@ import sys
from debug import logger
from network.advanceddispatcher import AdvancedDispatcher
import network.asyncore_pollchoose as asyncore
from queues import receiveDataQueue
import paths
import protocol
@ -58,14 +59,17 @@ class TLSDispatcher(AdvancedDispatcher):
do_handshake_on_connect=False)
self.sslSocket.setblocking(0)
self.want_read = self.want_write = True
self.set_state("bm_header")
self.set_state("tls_handshake")
return False
# if hasattr(self.socket, "context"):
# self.socket.context.set_ecdh_curve("secp256k1")
def state_tls_handshake(self):
return False
def writable(self):
try:
if self.tlsStarted and not self.tlsDone and not self.write_buf and self.writeQueue.empty():
#print "tls writable, %r" % (self.want_write)
if self.tlsStarted and not self.tlsDone and not self.write_buf:
return self.want_write
return AdvancedDispatcher.writable(self)
except AttributeError:
@ -73,9 +77,13 @@ class TLSDispatcher(AdvancedDispatcher):
def readable(self):
try:
if self.tlsStarted and not self.tlsDone and not self.write_buf and self.writeQueue.empty():
# during TLS handshake, and after flushing write buffer, return status of last handshake attempt
if self.tlsStarted and not self.tlsDone and not self.write_buf:
#print "tls readable, %r" % (self.want_read)
return self.want_read
# prior to TLS handshake, receiveDataThread should emulate synchronous behaviour
elif not self.fullyEstablished and (self.expectBytes == 0 or not self.write_buf_empty()):
return False
return AdvancedDispatcher.readable(self)
except AttributeError:
return AdvancedDispatcher.readable(self)
@ -83,11 +91,11 @@ class TLSDispatcher(AdvancedDispatcher):
def handle_read(self):
try:
# wait for write buffer flush
if self.tlsStarted and not self.tlsDone and not self.write_buf and self.writeQueue.empty():
#print "handshaking (read)"
if self.tlsStarted and not self.tlsDone and not self.write_buf:
#logger.debug("%s:%i TLS handshaking (read)", self.destination.host, self.destination.port)
self.tls_handshake()
else:
#print "not handshaking (read)"
#logger.debug("%s:%i Not TLS handshaking (read)", self.destination.host, self.destination.port)
return AdvancedDispatcher.handle_read(self)
except AttributeError:
return AdvancedDispatcher.handle_read(self)
@ -104,14 +112,14 @@ class TLSDispatcher(AdvancedDispatcher):
def handle_write(self):
try:
# wait for write buffer flush
if self.tlsStarted and not self.tlsDone and not self.write_buf and self.writeQueue.empty():
#print "handshaking (write)"
if self.tlsStarted and not self.tlsDone and not self.write_buf:
#logger.debug("%s:%i TLS handshaking (write)", self.destination.host, self.destination.port)
self.tls_handshake()
else:
#print "not handshaking (write)"
#logger.debug("%s:%i Not TLS handshaking (write)", self.destination.host, self.destination.port)
return AdvancedDispatcher.handle_write(self)
except AttributeError:
return AdvancedDispatcher.handle_read(self)
return AdvancedDispatcher.handle_write(self)
except ssl.SSLError as err:
if err.errno == ssl.SSL_ERROR_WANT_WRITE:
return 0
@ -158,6 +166,8 @@ class TLSDispatcher(AdvancedDispatcher):
self.del_channel()
self.set_socket(self.sslSocket)
self.tlsDone = True
self.set_state("bm_header")
self.set_connection_fully_established()
self.bm_proto_reset()
self.set_state("connection_fully_established")
receiveDataQueue.put(self)
return False

18
src/network/udp.py
View File

@ -9,7 +9,7 @@ from network.bmobject import BMObject, BMObjectInsufficientPOWError, BMObjectInv
import network.asyncore_pollchoose as asyncore
from network.objectracker import ObjectTracker
from queues import objectProcessorQueue, peerDiscoveryQueue, UISignalQueue
from queues import objectProcessorQueue, peerDiscoveryQueue, UISignalQueue, receiveDataQueue
import state
import protocol
@ -80,7 +80,7 @@ class UDPSocket(BMProto):
addresses = self._decode_addr()
# only allow peer discovery from private IPs in order to avoid attacks from random IPs on the internet
if not self.local:
return
return True
remoteport = False
for i in addresses:
seenTime, stream, services, ip, port = i
@ -93,7 +93,7 @@ class UDPSocket(BMProto):
# if the address isn't local, interpret it as the hosts' own announcement
remoteport = port
if remoteport is False:
return
return True
logger.debug("received peer discovery from %s:%i (port %i):", self.destination.host, self.destination.port, remoteport)
if self.local:
peerDiscoveryQueue.put(state.Peer(self.destination.host, remoteport))
@ -118,7 +118,7 @@ class UDPSocket(BMProto):
return
def writable(self):
return not self.writeQueue.empty()
return self.write_buf
def readable(self):
return len(self.read_buf) < AdvancedDispatcher._buf_len
@ -139,18 +139,14 @@ class UDPSocket(BMProto):
# overwrite the old buffer to avoid mixing data and so that self.local works correctly
self.read_buf = recdata
self.bm_proto_reset()
self.process()
receiveDataQueue.put(self)
def handle_write(self):
try:
data = self.writeQueue.get(False)
except Queue.Empty:
return
try:
retval = self.socket.sendto(data, ('<broadcast>', UDPSocket.port))
retval = self.socket.sendto(self.write_buf, ('<broadcast>', UDPSocket.port))
except socket.error as e:
logger.error("socket error on sendato: %s", str(e))
self.writeQueue.task_done()
self.slice_write_buf(retval)
if __name__ == "__main__":

1
src/queues.py
View File

@ -12,5 +12,6 @@ invQueue = MultiQueue()
addrQueue = MultiQueue()
portCheckerQueue = Queue.Queue()
peerDiscoveryQueue = Queue.Queue()
receiveDataQueue = Queue.Queue()
apiAddressGeneratorReturnQueue = Queue.Queue(
) # The address generator thread uses this queue to get information back to the API thread.