-
Notifications
You must be signed in to change notification settings - Fork 574
Expand file tree
/
Copy pathconnectionpool.py
More file actions
405 lines (377 loc) · 15.6 KB
/
Copy pathconnectionpool.py
File metadata and controls
405 lines (377 loc) · 15.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
"""
`BMConnectionPool` class definition
"""
import errno
import logging
import re
import socket
import sys
import time
import asyncore_pollchoose as asyncore
import helper_random
import knownnodes
import protocol
import state
from bmconfigparser import BMConfigParser
from connectionchooser import chooseConnection
from node import Peer
from proxy import Proxy
from singleton import Singleton
from tcp import (
bootstrap, Socks4aBMConnection, Socks5BMConnection,
TCPConnection, TCPServer)
from udp import UDPSocket
logger = logging.getLogger('default')
@Singleton
class BMConnectionPool(object):
"""Pool of all existing connections"""
# pylint: disable=too-many-instance-attributes
trustedPeer = None
"""
If the trustedpeer option is specified in keys.dat then this will
contain a Peer which will be connected to instead of using the
addresses advertised by other peers.
The expected use case is where the user has a trusted server where
they run a Bitmessage daemon permanently. If they then run a second
instance of the client on a local machine periodically when they want
to check for messages it will sync with the network a lot faster
without compromising security.
"""
def __init__(self):
asyncore.set_rates(
BMConfigParser().safeGetInt(
"bitmessagesettings", "maxdownloadrate"),
BMConfigParser().safeGetInt(
"bitmessagesettings", "maxuploadrate")
)
self.outboundConnections = {}
self.inboundConnections = {}
self.listeningSockets = {}
self.udpSockets = {}
self.streams = []
self._lastSpawned = 0
self._spawnWait = 2
self._bootstrapped = False
trustedPeer = BMConfigParser().safeGet(
'bitmessagesettings', 'trustedpeer')
try:
if trustedPeer:
host, port = trustedPeer.split(':')
self.trustedPeer = Peer(host, int(port))
except ValueError:
sys.exit(
'Bad trustedpeer config setting! It should be set as'
' trustedpeer=<hostname>:<portnumber>'
)
def __len__(self):
return len(self.outboundConnections) + len(self.inboundConnections)
def connections(self):
"""
Shortcut for combined list of connections from
`inboundConnections` and `outboundConnections` dicts
"""
return self.inboundConnections.values() + self.outboundConnections.values()
def establishedConnections(self):
"""Shortcut for list of connections having fullyEstablished == True"""
return [
x for x in self.connections() if x.fullyEstablished]
def connectToStream(self, streamNumber):
"""Connect to a bitmessage stream"""
self.streams.append(streamNumber)
state.streamsInWhichIAmParticipating.append(streamNumber)
def getConnectionByAddr(self, addr):
"""
Return an (existing) connection object based on a `Peer` object
(IP and port)
"""
try:
return self.inboundConnections[addr]
except KeyError:
pass
try:
return self.inboundConnections[addr.host]
except (KeyError, AttributeError):
pass
try:
return self.outboundConnections[addr]
except KeyError:
pass
try:
return self.udpSockets[addr.host]
except (KeyError, AttributeError):
pass
raise KeyError
def isAlreadyConnected(self, nodeid):
"""Check if we're already connected to this peer"""
for i in self.connections():
try:
if nodeid == i.nodeid:
return True
except AttributeError:
pass
return False
def addConnection(self, connection):
"""Add a connection object to our internal dict"""
if isinstance(connection, 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):
"""Remove a connection from our internal dict"""
if isinstance(connection, UDPSocket):
del self.udpSockets[connection.listening.host]
elif isinstance(connection, TCPServer):
del self.listeningSockets[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
connection.handle_close()
@staticmethod
def getListeningIP():
"""What IP are we supposed to be listening on?"""
if BMConfigParser().safeGet(
"bitmessagesettings", "onionhostname").endswith(".onion"):
host = BMConfigParser().safeGet(
"bitmessagesettings", "onionbindip")
else:
host = '127.0.0.1'
if (
BMConfigParser().safeGetBoolean("bitmessagesettings", "sockslisten")
or BMConfigParser().safeGet("bitmessagesettings", "socksproxytype")
== "none"
):
# python doesn't like bind + INADDR_ANY?
# host = socket.INADDR_ANY
host = BMConfigParser().get("network", "bind")
return host
def startListening(self, bind=None):
"""Open a listening socket and start accepting connections on it"""
if bind is None:
bind = self.getListeningIP()
port = BMConfigParser().safeGetInt("bitmessagesettings", "port")
# correct port even if it changed
ls = TCPServer(host=bind, port=port)
self.listeningSockets[ls.destination] = ls
def startUDPSocket(self, bind=None):
"""
Open an UDP socket. Depending on settings, it can either only
accept incoming UDP packets, or also be able to send them.
"""
if bind is None:
host = self.getListeningIP()
udpSocket = UDPSocket(host=host, announcing=True)
else:
if bind is False:
udpSocket = UDPSocket(announcing=False)
else:
udpSocket = UDPSocket(host=bind, announcing=True)
self.udpSockets[udpSocket.listening.host] = udpSocket
def startBootstrappers(self):
"""Run the process of resolving bootstrap hostnames"""
proxy_type = BMConfigParser().safeGet(
'bitmessagesettings', 'socksproxytype')
# A plugins may be added here
hostname = None
if not proxy_type or proxy_type == 'none':
connection_base = TCPConnection
elif proxy_type == 'SOCKS5':
connection_base = Socks5BMConnection
hostname = helper_random.randomchoice([
'quzwelsuziwqgpt2.onion', None
])
elif proxy_type == 'SOCKS4a':
connection_base = Socks4aBMConnection # FIXME: I cannot test
else:
# This should never happen because socksproxytype setting
# is handled in bitmessagemain before starting the connectionpool
return
bootstrapper = bootstrap(connection_base)
if not hostname:
port = helper_random.randomchoice([8080, 8444])
hostname = 'bootstrap%s.bitmessage.org' % port
else:
port = 8444
self.addConnection(bootstrapper(hostname, port))
def loop(self): # pylint: disable=too-many-branches,too-many-statements
"""Main Connectionpool's loop"""
# pylint: disable=too-many-locals
# 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
socksproxytype = BMConfigParser().safeGet(
'bitmessagesettings', 'socksproxytype', '')
onionsocksproxytype = BMConfigParser().safeGet(
'bitmessagesettings', 'onionsocksproxytype', '')
if (
socksproxytype[:5] == 'SOCKS'
and not BMConfigParser().safeGetBoolean(
'bitmessagesettings', 'sockslisten')
and '.onion' not in BMConfigParser().safeGet(
'bitmessagesettings', 'onionhostname', '')
):
acceptConnections = False
# pylint: disable=too-many-nested-blocks
if spawnConnections:
if not knownnodes.knownNodesActual:
self.startBootstrappers()
knownnodes.knownNodesActual = True
if not self._bootstrapped:
self._bootstrapped = True
Proxy.proxy = (
BMConfigParser().safeGet(
'bitmessagesettings', 'sockshostname'),
BMConfigParser().safeGetInt(
'bitmessagesettings', 'socksport')
)
# TODO AUTH
# TODO reset based on GUI settings changes
try:
if not onionsocksproxytype.startswith("SOCKS"):
raise ValueError
Proxy.onion_proxy = (
BMConfigParser().safeGet(
'network', 'onionsockshostname', None),
BMConfigParser().safeGet(
'network', 'onionsocksport', None)
)
except ValueError:
Proxy.onion_proxy = None
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 = self.trustedPeer or chooseConnection(
helper_random.randomchoice(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
# don't connect to the hosts from the same
# network group, defense against sibyl attacks
host_network_group = protocol.network_group(
chosen.host)
same_group = False
for j in self.outboundConnections.values():
if host_network_group == j.network_group:
same_group = True
if chosen.host == j.destination.host:
knownnodes.decreaseRating(chosen)
break
if same_group:
continue
try:
if chosen.host.endswith(".onion") and Proxy.onion_proxy:
if onionsocksproxytype == "SOCKS5":
self.addConnection(Socks5BMConnection(chosen))
elif onionsocksproxytype == "SOCKS4a":
self.addConnection(Socks4aBMConnection(chosen))
elif socksproxytype == "SOCKS5":
self.addConnection(Socks5BMConnection(chosen))
elif socksproxytype == "SOCKS4a":
self.addConnection(Socks4aBMConnection(chosen))
else:
self.addConnection(TCPConnection(chosen))
except socket.error as e:
if e.errno == errno.ENETUNREACH:
continue
self._lastSpawned = time.time()
else:
for i in self.connections():
# FIXME: rating will be increased after next connection
i.handle_close()
if acceptConnections:
if not self.listeningSockets:
if BMConfigParser().safeGet('network', 'bind') == '':
self.startListening()
else:
for bind in re.sub(
r'[^\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(
r'[^\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.close_reason = "Stopping listening"
i.accepting = i.connecting = i.connected = False
logger.info('Stopped listening for incoming connections.')
if self.udpSockets:
for i in self.udpSockets.values():
i.close_reason = "Stopping UDP socket"
i.accepting = i.connecting = i.connected = False
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.connections():
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.set_state("close")
for i in (
self.connections()
+ self.listeningSockets.values() + self.udpSockets.values()
):
if not (i.accepting or i.connecting or i.connected):
reaper.append(i)
else:
try:
if i.state == "close":
reaper.append(i)
except AttributeError:
pass
for i in reaper:
self.removeConnection(i)