1083 lines
33 KiB
Python
1083 lines
33 KiB
Python
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## common/xmpp/socks5.py
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##
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## Contributors for this file:
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## - Yann Le Boulanger <asterix@lagaule.org>
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## - Nikos Kouremenos <kourem@gmail.com>
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## - Dimitur Kirov <dkirov@gmail.com>
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##
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## Copyright (C) 2003-2004 Yann Le Boulanger <asterix@lagaule.org>
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## Vincent Hanquez <tab@snarc.org>
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## Copyright (C) 2005 Yann Le Boulanger <asterix@lagaule.org>
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## Vincent Hanquez <tab@snarc.org>
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## Nikos Kouremenos <kourem@gmail.com>
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## Dimitur Kirov <dkirov@gmail.com>
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## Travis Shirk <travis@pobox.com>
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## Norman Rasmussen <norman@rasmussen.co.za>
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##
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## This file is part of Gajim.
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##
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## Gajim is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published
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## by the Free Software Foundation; version 3 only.
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##
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## Gajim is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with Gajim. If not, see <http://www.gnu.org/licenses/>.
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##
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import socket
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import struct
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import sha
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from dialogs import BindPortError
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from errno import EWOULDBLOCK
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from errno import ENOBUFS
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from errno import EINTR
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from errno import EISCONN
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from xmpp.idlequeue import IdleObject
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MAX_BUFF_LEN = 65536
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# after foo seconds without activity label transfer as 'stalled'
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STALLED_TIMEOUT = 10
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# after foo seconds of waiting to connect, disconnect from
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# streamhost and try next one
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CONNECT_TIMEOUT = 30
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# nothing received for the last foo seconds - stop transfer
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# if it is 0, then transfer will wait forever
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READ_TIMEOUT = 180
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# nothing sent for the last foo seconds - stop transfer
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# if it is 0, then transfer will wait forever
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SEND_TIMEOUT = 180
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class SocksQueue:
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''' queue for all file requests objects '''
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def __init__(self, idlequeue, complete_transfer_cb = None, progress_transfer_cb = None):
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self.connected = 0
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self.readers = {}
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self.files_props = {}
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self.senders = {}
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self.idx = 1
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self.listener = None
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self.sha_handlers = {}
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# handle all io events in the global idle queue, instead of processing
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# each foo seconds
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self.idlequeue = idlequeue
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self.complete_transfer_cb = complete_transfer_cb
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self.progress_transfer_cb = progress_transfer_cb
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self.on_success = None
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self.on_failure = None
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def start_listener(self, port, sha_str, sha_handler, sid):
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''' start waiting for incomming connections on (host, port)
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and do a socks5 authentication using sid for generated sha
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'''
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self.sha_handlers[sha_str] = (sha_handler, sid)
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if self.listener == None:
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self.listener = Socks5Listener(self.idlequeue, port)
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self.listener.queue = self
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self.listener.bind()
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if self.listener.started is False:
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self.listener = None
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# We cannot bind port, call error
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# dialog from dialogs.py and fail
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BindPortError(port)
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return None
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self.connected += 1
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return self.listener
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def send_success_reply(self, file_props, streamhost):
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if file_props.has_key('streamhost-used') and \
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file_props['streamhost-used'] is True:
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if file_props.has_key('proxyhosts'):
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for proxy in file_props['proxyhosts']:
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if proxy == streamhost:
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self.on_success(streamhost)
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return 2
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return 0
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if file_props.has_key('streamhosts'):
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for host in file_props['streamhosts']:
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if streamhost['state'] == 1:
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return 0
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streamhost['state'] = 1
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self.on_success(streamhost)
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return 1
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return 0
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def connect_to_hosts(self, account, sid, on_success = None,
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on_failure = None):
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self.on_success = on_success
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self.on_failure = on_failure
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file_props = self.files_props[account][sid]
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file_props['failure_cb'] = on_failure
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# add streamhosts to the queue
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for streamhost in file_props['streamhosts']:
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receiver = Socks5Receiver(self.idlequeue, streamhost, sid, file_props)
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self.add_receiver(account, receiver)
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streamhost['idx'] = receiver.queue_idx
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def _socket_connected(self, streamhost, file_props):
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''' called when there is a host connected to one of the
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senders's streamhosts. Stop othere attempts for connections '''
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for host in file_props['streamhosts']:
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if host != streamhost and host.has_key('idx'):
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if host['state'] == 1:
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# remove current
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self.remove_receiver(streamhost['idx'])
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return
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# set state -2, meaning that this streamhost is stopped,
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# but it may be connectected later
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if host['state'] >=0:
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self.remove_receiver(host['idx'])
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host['idx'] = -1
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host['state'] = -2
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def reconnect_receiver(self, receiver, streamhost):
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''' Check the state of all streamhosts and if all has failed, then
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emit connection failure cb. If there are some which are still
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not connected try to establish connection to one of them.
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'''
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self.idlequeue.remove_timeout(receiver.fd)
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self.idlequeue.unplug_idle(receiver.fd)
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file_props = receiver.file_props
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streamhost['state'] = -1
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# boolean, indicates that there are hosts, which are not tested yet
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unused_hosts = False
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for host in file_props['streamhosts']:
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if host.has_key('idx'):
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if host['state'] >= 0:
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return
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elif host['state'] == -2:
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unused_hosts = True
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if unused_hosts:
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for host in file_props['streamhosts']:
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if host['state'] == -2:
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host['state'] = 0
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receiver = Socks5Receiver(self.idlequeue, host, host['sid'], file_props)
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self.add_receiver(receiver.account, receiver)
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host['idx'] = receiver.queue_idx
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# we still have chances to connect
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return
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if not file_props.has_key('received-len') or file_props['received-len'] == 0:
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# there are no other streamhosts and transfer hasn't started
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self._connection_refused(streamhost, file_props, receiver.queue_idx)
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else:
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# transfer stopped, it is most likely stopped from sender
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receiver.disconnect()
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file_props['error'] = -1
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self.process_result(-1, receiver)
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def _connection_refused(self, streamhost, file_props, idx):
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''' cb, called when we loose connection during transfer'''
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if file_props is None:
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return
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streamhost['state'] = -1
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self.remove_receiver(idx, False)
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if file_props.has_key('streamhosts'):
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for host in file_props['streamhosts']:
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if host['state'] != -1:
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return
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# failure_cb exists - this means that it has never been called
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if file_props.has_key('failure_cb') and file_props['failure_cb']:
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file_props['failure_cb'](streamhost['initiator'], streamhost['id'],
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file_props['sid'], code = 404)
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del(file_props['failure_cb'])
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def add_receiver(self, account, sock5_receiver):
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''' add new file request '''
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self.readers[self.idx] = sock5_receiver
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sock5_receiver.queue_idx = self.idx
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sock5_receiver.queue = self
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sock5_receiver.account = account
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self.idx += 1
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result = sock5_receiver.connect()
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self.connected += 1
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if result != None:
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result = sock5_receiver.main()
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self.process_result(result, sock5_receiver)
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return 1
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return None
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def get_file_from_sender(self, file_props, account):
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if file_props is None:
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return
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if file_props.has_key('hash') and \
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self.senders.has_key(file_props['hash']):
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sender = self.senders[file_props['hash']]
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sender.account = account
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result = self.get_file_contents(0)
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self.process_result(result, sender)
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def result_sha(self, sha_str, idx):
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if self.sha_handlers.has_key(sha_str):
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props = self.sha_handlers[sha_str]
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props[0](props[1], idx)
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def activate_proxy(self, idx):
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if not self.readers.has_key(idx):
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return
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reader = self.readers[idx]
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if reader.file_props['type'] != 's':
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return
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if reader.state != 5:
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return
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reader.state = 6
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if reader.connected:
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reader.file_props['error'] = 0
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reader.file_props['disconnect_cb'] = reader.disconnect
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reader.file_props['started'] = True
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reader.file_props['completed'] = False
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reader.file_props['paused'] = False
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reader.file_props['stalled'] = False
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reader.file_props['elapsed-time'] = 0
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reader.file_props['last-time'] = self.idlequeue.current_time()
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reader.file_props['received-len'] = 0
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reader.pauses = 0
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# start sending file to proxy
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self.idlequeue.set_read_timeout(reader.fd, STALLED_TIMEOUT)
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self.idlequeue.plug_idle(reader, True, False)
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result = reader.write_next()
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self.process_result(result, reader)
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def send_file(self, file_props, account):
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if file_props.has_key('hash') and \
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self.senders.has_key(file_props['hash']):
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sender = self.senders[file_props['hash']]
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file_props['streamhost-used'] = True
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sender.account = account
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if file_props['type'] == 's':
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sender.file_props = file_props
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result = sender.send_file()
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self.process_result(result, sender)
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else:
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file_props['elapsed-time'] = 0
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file_props['last-time'] = self.idlequeue.current_time()
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file_props['received-len'] = 0
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sender.file_props = file_props
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def add_file_props(self, account, file_props):
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''' file_prop to the dict of current file_props.
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It is identified by account name and sid
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'''
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if file_props is None or \
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file_props.has_key('sid') is False:
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return
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_id = file_props['sid']
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if not self.files_props.has_key(account):
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self.files_props[account] = {}
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self.files_props[account][_id] = file_props
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def remove_file_props(self, account, sid):
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if self.files_props.has_key(account):
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fl_props = self.files_props[account]
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if fl_props.has_key(sid):
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del(fl_props[sid])
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if len(self.files_props) == 0:
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self.connected = 0
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def get_file_props(self, account, sid):
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''' get fil_prop by account name and session id '''
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if self.files_props.has_key(account):
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fl_props = self.files_props[account]
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if fl_props.has_key(sid):
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return fl_props[sid]
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return None
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def on_connection_accepted(self, sock):
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sock_hash = sock.__hash__()
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if not self.senders.has_key(sock_hash):
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self.senders[sock_hash] = Socks5Sender(self.idlequeue,
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sock_hash, self, sock[0], sock[1][0], sock[1][1])
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self.connected += 1
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def process_result(self, result, actor):
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''' Take appropriate actions upon the result:
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[ 0, - 1 ] complete/end transfer
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[ > 0 ] send progress message
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[ None ] do nothing
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'''
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if result is None:
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return
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if result in (0, -1) and self.complete_transfer_cb is not None:
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account = actor.account
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if account is None and actor.file_props.has_key('tt_account'):
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account = actor.file_props['tt_account']
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self.complete_transfer_cb(account, actor.file_props)
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elif self.progress_transfer_cb is not None:
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self.progress_transfer_cb(actor.account, actor.file_props)
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def remove_receiver(self, idx, do_disconnect = True):
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''' Remove reciver from the list and decrease
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the number of active connections with 1'''
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if idx != -1:
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if self.readers.has_key(idx):
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reader = self.readers[idx]
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self.idlequeue.unplug_idle(reader.fd)
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self.idlequeue.remove_timeout(reader.fd)
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if do_disconnect:
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reader.disconnect()
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else:
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if reader.streamhost is not None:
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reader.streamhost['state'] = -1
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del(self.readers[idx])
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def remove_sender(self, idx, do_disconnect = True):
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''' Remove sender from the list of senders and decrease the
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number of active connections with 1'''
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if idx != -1:
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if self.senders.has_key(idx):
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if do_disconnect:
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self.senders[idx].disconnect()
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return
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else:
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del(self.senders[idx])
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if self.connected > 0:
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self.connected -= 1
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if len(self.senders) == 0 and self.listener is not None:
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self.listener.disconnect()
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self.listener = None
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self.connected -= 1
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class Socks5:
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def __init__(self, idlequeue, host, port, initiator, target, sid):
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if host is not None:
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try:
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self.host = host
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self.ais = socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket.SOCK_STREAM)
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except socket.gaierror:
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self.ais = None
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self.idlequeue = idlequeue
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self.fd = -1
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self.port = port
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self.initiator = initiator
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self.target = target
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self.sid = sid
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self._sock = None
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self.account = None
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self.state = 0 # not connected
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self.pauses = 0
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self.size = 0
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self.remaining_buff = ''
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self.file = None
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def open_file_for_reading(self):
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if self.file == None:
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try:
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self.file = open(self.file_props['file-name'],'rb')
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if self.file_props.has_key('offset') and self.file_props['offset']:
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self.size = self.file_props['offset']
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self.file.seek(self.size)
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self.file_props['received-len'] = self.size
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except IOError, e:
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self.close_file()
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raise IOError, e
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def close_file(self):
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if self.file:
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if not self.file.closed:
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try:
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self.file.close()
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except:
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pass
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self.file = None
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def get_fd(self):
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''' Test if file is already open and return its fd,
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or just open the file and return the fd.
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'''
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if self.file_props.has_key('fd'):
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fd = self.file_props['fd']
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else:
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offset = 0
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opt = 'wb'
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if self.file_props.has_key('offset') and self.file_props['offset']:
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offset = self.file_props['offset']
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opt = 'ab'
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fd = open(self.file_props['file-name'], opt)
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self.file_props['fd'] = fd
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self.file_props['elapsed-time'] = 0
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self.file_props['last-time'] = self.idlequeue.current_time()
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self.file_props['received-len'] = offset
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return fd
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def rem_fd(self, fd):
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if self.file_props.has_key('fd'):
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del(self.file_props['fd'])
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try:
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fd.close()
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except:
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pass
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|
|
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def receive(self):
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''' Reads small chunks of data.
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Calls owner's disconnected() method if appropriate.'''
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received = ''
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try:
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add = self._recv(64)
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except Exception, e:
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add=''
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received +=add
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if len(add) == 0:
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self.disconnect()
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return add
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def send_raw(self,raw_data):
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''' Writes raw outgoing data. '''
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try:
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lenn = self._send(raw_data)
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except Exception, e:
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self.disconnect()
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return len(raw_data)
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|
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def write_next(self):
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if self.remaining_buff != '':
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buff = self.remaining_buff
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self.remaining_buff = ''
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else:
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try:
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self.open_file_for_reading()
|
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except IOError, e:
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self.state = 8 # end connection
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self.disconnect()
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self.file_props['error'] = -7 # unable to read from file
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return -1
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buff = self.file.read(MAX_BUFF_LEN)
|
|
if len(buff) > 0:
|
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lenn = 0
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try:
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lenn = self._send(buff)
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except Exception, e:
|
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if e.args[0] not in (EINTR, ENOBUFS, EWOULDBLOCK):
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# peer stopped reading
|
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self.state = 8 # end connection
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self.disconnect()
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self.file_props['error'] = -1
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return -1
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self.size += lenn
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current_time = self.idlequeue.current_time()
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self.file_props['elapsed-time'] += current_time - \
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self.file_props['last-time']
|
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self.file_props['last-time'] = current_time
|
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self.file_props['received-len'] = self.size
|
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if self.size >= int(self.file_props['size']):
|
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self.state = 8 # end connection
|
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self.file_props['error'] = 0
|
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self.disconnect()
|
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return -1
|
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if lenn != len(buff):
|
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self.remaining_buff = buff[lenn:]
|
|
else:
|
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self.remaining_buff = ''
|
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self.state = 7 # continue to write in the socket
|
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if lenn == 0:
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return None
|
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self.file_props['stalled'] = False
|
|
return lenn
|
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else:
|
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self.state = 8 # end connection
|
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self.disconnect()
|
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return -1
|
|
|
|
def get_file_contents(self, timeout):
|
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''' read file contents from socket and write them to file ''', \
|
|
self.file_props['type'], self.file_props['sid']
|
|
if self.file_props is None or \
|
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self.file_props.has_key('file-name') is False:
|
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self.file_props['error'] = -2
|
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return None
|
|
fd = None
|
|
if self.remaining_buff != '':
|
|
fd = self.get_fd()
|
|
fd.write(self.remaining_buff)
|
|
lenn = len(self.remaining_buff)
|
|
current_time = self.idlequeue.current_time()
|
|
self.file_props['elapsed-time'] += current_time - \
|
|
self.file_props['last-time']
|
|
self.file_props['last-time'] = current_time
|
|
self.file_props['received-len'] += lenn
|
|
self.remaining_buff = ''
|
|
if self.file_props['received-len'] == int(self.file_props['size']):
|
|
self.rem_fd(fd)
|
|
self.disconnect()
|
|
self.file_props['error'] = 0
|
|
self.file_props['completed'] = True
|
|
return 0
|
|
else:
|
|
fd = self.get_fd()
|
|
try:
|
|
buff = self._recv(MAX_BUFF_LEN)
|
|
except Exception, e:
|
|
buff = ''
|
|
current_time = self.idlequeue.current_time()
|
|
self.file_props['elapsed-time'] += current_time - \
|
|
self.file_props['last-time']
|
|
self.file_props['last-time'] = current_time
|
|
self.file_props['received-len'] += len(buff)
|
|
if len(buff) == 0:
|
|
# Transfer stopped somehow:
|
|
# reset, paused or network error
|
|
self.rem_fd(fd)
|
|
self.disconnect(False)
|
|
self.file_props['error'] = -1
|
|
return 0
|
|
try:
|
|
fd.write(buff)
|
|
except IOError, e:
|
|
self.rem_fd(fd)
|
|
self.disconnect(False)
|
|
self.file_props['error'] = -6 # file system error
|
|
return 0
|
|
if self.file_props['received-len'] >= int(self.file_props['size']):
|
|
# transfer completed
|
|
self.rem_fd(fd)
|
|
self.disconnect()
|
|
self.file_props['error'] = 0
|
|
self.file_props['completed'] = True
|
|
return 0
|
|
# return number of read bytes. It can be used in progressbar
|
|
if fd != None:
|
|
self.file_props['stalled'] = False
|
|
if fd == None and self.file_props['stalled'] is False:
|
|
return None
|
|
if self.file_props.has_key('received-len'):
|
|
if self.file_props['received-len'] != 0:
|
|
return self.file_props['received-len']
|
|
return None
|
|
|
|
def disconnect(self):
|
|
''' Closes open descriptors and remover socket descr. from idleque '''
|
|
# be sure that we don't leave open file
|
|
self.close_file()
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
self.idlequeue.unplug_idle(self.fd)
|
|
try:
|
|
self._sock.shutdown(socket.SHUT_RDWR)
|
|
self._sock.close()
|
|
except:
|
|
# socket is already closed
|
|
pass
|
|
self.connected = False
|
|
self.fd = -1
|
|
self.state = -1
|
|
|
|
def _get_auth_buff(self):
|
|
''' Message, that we support 1 one auth mechanism:
|
|
the 'no auth' mechanism. '''
|
|
return struct.pack('!BBB', 0x05, 0x01, 0x00)
|
|
|
|
def _parse_auth_buff(self, buff):
|
|
''' Parse the initial message and create a list of auth
|
|
mechanisms '''
|
|
auth_mechanisms = []
|
|
try:
|
|
ver, num_auth = struct.unpack('!BB', buff[:2])
|
|
for i in xrange(num_auth):
|
|
mechanism, = struct.unpack('!B', buff[1 + i])
|
|
auth_mechanisms.append(mechanism)
|
|
except:
|
|
return None
|
|
return auth_mechanisms
|
|
def _get_auth_response(self):
|
|
''' socks version(5), number of extra auth methods (we send
|
|
0x00 - no auth
|
|
) '''
|
|
return struct.pack('!BB', 0x05, 0x00)
|
|
|
|
def _get_connect_buff(self):
|
|
''' Connect request by domain name '''
|
|
buff = struct.pack('!BBBBB%dsBB' % len(self.host),
|
|
0x05, 0x01, 0x00, 0x03, len(self.host), self.host,
|
|
self.port >> 8, self.port & 0xff)
|
|
return buff
|
|
|
|
def _get_request_buff(self, msg, command = 0x01):
|
|
''' Connect request by domain name,
|
|
sid sha, instead of domain name (jep 0096) '''
|
|
buff = struct.pack('!BBBBB%dsBB' % len(msg),
|
|
0x05, command, 0x00, 0x03, len(msg), msg, 0, 0)
|
|
return buff
|
|
|
|
def _parse_request_buff(self, buff):
|
|
try: # don't trust on what comes from the outside
|
|
version, req_type, reserved, host_type, = \
|
|
struct.unpack('!BBBB', buff[:4])
|
|
if host_type == 0x01:
|
|
host_arr = struct.unpack('!iiii', buff[4:8])
|
|
host, = reduce(lambda e1, e2: str(e1) + "." + str(e2), host_arr)
|
|
host_len = len(host)
|
|
elif host_type == 0x03:
|
|
host_len, = struct.unpack('!B' , buff[4])
|
|
host, = struct.unpack('!%ds' % host_len, buff[5:5 + host_len])
|
|
portlen = len(buff[host_len + 5:])
|
|
if portlen == 1:
|
|
port, = struct.unpack('!B', buff[host_len + 5])
|
|
elif portlen == 2:
|
|
port, = struct.unpack('!H', buff[host_len + 5:])
|
|
# file data, comes with auth message (Gaim bug)
|
|
else:
|
|
port, = struct.unpack('!H', buff[host_len + 5: host_len + 7])
|
|
self.remaining_buff = buff[host_len + 7:]
|
|
except:
|
|
return (None, None, None)
|
|
return (req_type, host, port)
|
|
|
|
def read_connect(self):
|
|
''' connect responce: version, auth method '''
|
|
buff = self._recv()
|
|
try:
|
|
version, method = struct.unpack('!BB', buff)
|
|
except:
|
|
version, method = None, None
|
|
if version != 0x05 or method == 0xff:
|
|
self.disconnect()
|
|
|
|
def continue_paused_transfer(self):
|
|
if self.state < 5:
|
|
return
|
|
if self.file_props['type'] == 'r':
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
else:
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
|
|
def _get_sha1_auth(self):
|
|
''' get sha of sid + Initiator jid + Target jid '''
|
|
if self.file_props.has_key('is_a_proxy'):
|
|
del(self.file_props['is_a_proxy'])
|
|
return sha.new('%s%s%s' % (self.sid, self.file_props['proxy_sender'],
|
|
self.file_props['proxy_receiver'])).hexdigest()
|
|
return sha.new('%s%s%s' % (self.sid, self.initiator, self.target)).hexdigest()
|
|
|
|
class Socks5Sender(Socks5, IdleObject):
|
|
''' class for sending file to socket over socks5 '''
|
|
def __init__(self, idlequeue, sock_hash, parent, _sock, host = None, port = None):
|
|
self.queue_idx = sock_hash
|
|
self.queue = parent
|
|
Socks5.__init__(self, idlequeue, host, port, None, None, None)
|
|
self._sock = _sock
|
|
self._sock.setblocking(False)
|
|
self.fd = _sock.fileno()
|
|
self._recv = _sock.recv
|
|
self._send = _sock.send
|
|
self.connected = True
|
|
self.state = 1 # waiting for first bytes
|
|
self.file_props = None
|
|
# start waiting for data
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
|
|
def read_timeout(self):
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
if self.state > 5:
|
|
# no activity for foo seconds
|
|
if self.file_props['stalled'] == False:
|
|
self.file_props['stalled'] = True
|
|
self.queue.process_result(-1, self)
|
|
if SEND_TIMEOUT > 0:
|
|
self.idlequeue.set_read_timeout(self.fd, SEND_TIMEOUT)
|
|
else:
|
|
# stop transfer, there is no error code for this
|
|
self.pollend()
|
|
|
|
def pollout(self):
|
|
if not self.connected:
|
|
self.disconnect()
|
|
return
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
if self.state == 2: # send reply with desired auth type
|
|
self.send_raw(self._get_auth_response())
|
|
elif self.state == 4: # send positive response to the 'connect'
|
|
self.send_raw(self._get_request_buff(self.sha_msg, 0x00))
|
|
elif self.state == 7:
|
|
if self.file_props['paused']:
|
|
self.file_props['continue_cb'] = self.continue_paused_transfer
|
|
self.idlequeue.plug_idle(self, False, False)
|
|
return
|
|
result = self.write_next()
|
|
self.queue.process_result(result, self)
|
|
if result is None or result <= 0:
|
|
self.disconnect()
|
|
return
|
|
self.idlequeue.set_read_timeout(self.fd, STALLED_TIMEOUT)
|
|
elif self.state == 8:
|
|
self.disconnect()
|
|
return
|
|
else:
|
|
self.disconnect()
|
|
if self.state < 5:
|
|
self.state += 1
|
|
# unplug and plug this time for reading
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
|
|
def pollend(self):
|
|
self.state = 8 # end connection
|
|
self.disconnect()
|
|
self.file_props['error'] = -1
|
|
self.queue.process_result(-1, self)
|
|
|
|
def pollin(self):
|
|
if self.connected:
|
|
if self.state < 5:
|
|
result = self.main()
|
|
if self.state == 4:
|
|
self.queue.result_sha(self.sha_msg, self.queue_idx)
|
|
if result == -1:
|
|
self.disconnect()
|
|
|
|
elif self.state == 5:
|
|
if self.file_props is not None and \
|
|
self.file_props['type'] == 'r':
|
|
result = self.get_file_contents(0)
|
|
self.queue.process_result(result, self)
|
|
else:
|
|
self.disconnect()
|
|
|
|
def send_file(self):
|
|
''' start sending the file over verified connection '''
|
|
if self.file_props['started']:
|
|
return
|
|
self.file_props['error'] = 0
|
|
self.file_props['disconnect_cb'] = self.disconnect
|
|
self.file_props['started'] = True
|
|
self.file_props['completed'] = False
|
|
self.file_props['paused'] = False
|
|
self.file_props['continue_cb'] = self.continue_paused_transfer
|
|
self.file_props['stalled'] = False
|
|
self.file_props['connected'] = True
|
|
self.file_props['elapsed-time'] = 0
|
|
self.file_props['last-time'] = self.idlequeue.current_time()
|
|
self.file_props['received-len'] = 0
|
|
self.pauses = 0
|
|
self.state = 7
|
|
# plug for writing
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
return self.write_next() # initial for nl byte
|
|
|
|
def main(self):
|
|
''' initial requests for verifying the connection '''
|
|
if self.state == 1: # initial read
|
|
buff = self.receive()
|
|
if not self.connected:
|
|
return -1
|
|
mechs = self._parse_auth_buff(buff)
|
|
if mechs is None:
|
|
return -1 # invalid auth methods received
|
|
elif self.state == 3: # get next request
|
|
buff = self.receive()
|
|
(req_type, self.sha_msg, port) = self._parse_request_buff(buff)
|
|
if req_type != 0x01:
|
|
return -1 # request is not of type 'connect'
|
|
self.state += 1 # go to the next step
|
|
# unplug & plug for writing
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
return None
|
|
|
|
def disconnect(self, cb = True):
|
|
''' Closes the socket. '''
|
|
# close connection and remove us from the queue
|
|
Socks5.disconnect(self)
|
|
if self.file_props is not None:
|
|
self.file_props['connected'] = False
|
|
self.file_props['disconnect_cb'] = None
|
|
if self.queue is not None:
|
|
self.queue.remove_sender(self.queue_idx, False)
|
|
|
|
class Socks5Listener(IdleObject):
|
|
def __init__(self, idlequeue, port):
|
|
''' handle all incomming connections on (0.0.0.0, port)
|
|
This class implements IdleObject, but we will expect
|
|
only pollin events though
|
|
'''
|
|
self.port = port
|
|
self.ais = socket.getaddrinfo(None, port, socket.AF_UNSPEC,
|
|
socket.SOCK_STREAM, socket.SOL_TCP, socket.AI_PASSIVE)
|
|
self.queue_idx = -1
|
|
self.idlequeue = idlequeue
|
|
self.queue = None
|
|
self.started = False
|
|
self._sock = None
|
|
self.fd = -1
|
|
|
|
def bind(self):
|
|
for ai in self.ais:
|
|
#try the different possibilities (ipv6, ipv4, etc.)
|
|
self._serv = socket.socket(*ai[:3])
|
|
self._serv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
self._serv.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
|
|
self._serv.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
|
|
# will fail when port as busy, or we don't have rights to bind
|
|
try:
|
|
self._serv.bind(ai[4])
|
|
self.ai = ai
|
|
break
|
|
except:
|
|
self.ai = None
|
|
continue
|
|
if not self.ai:
|
|
# unable to bind, show error dialog
|
|
return None
|
|
self._serv.listen(socket.SOMAXCONN)
|
|
self._serv.setblocking(False)
|
|
self.fd = self._serv.fileno()
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
self.started = True
|
|
|
|
def pollend(self):
|
|
''' called when we stop listening on (host, port) '''
|
|
self.disconnect()
|
|
|
|
def pollin(self):
|
|
''' accept a new incomming connection and notify queue'''
|
|
sock = self.accept_conn()
|
|
self.queue.on_connection_accepted(sock)
|
|
|
|
def disconnect(self):
|
|
''' free all resources, we are not listening anymore '''
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
self.idlequeue.unplug_idle(self.fd)
|
|
self.fd = -1
|
|
self.state = -1
|
|
self.started = False
|
|
try:
|
|
self._serv.close()
|
|
except:
|
|
pass
|
|
|
|
def accept_conn(self):
|
|
''' accepts a new incomming connection '''
|
|
_sock = self._serv.accept()
|
|
_sock[0].setblocking(False)
|
|
return _sock
|
|
|
|
class Socks5Receiver(Socks5, IdleObject):
|
|
def __init__(self, idlequeue, streamhost, sid, file_props = None):
|
|
self.queue_idx = -1
|
|
self.streamhost = streamhost
|
|
self.queue = None
|
|
self.file_props = file_props
|
|
self.connect_timeout = 0
|
|
self.connected = False
|
|
self.pauses = 0
|
|
if not self.file_props:
|
|
self.file_props = {}
|
|
self.file_props['disconnect_cb'] = self.disconnect
|
|
self.file_props['error'] = 0
|
|
self.file_props['started'] = True
|
|
self.file_props['completed'] = False
|
|
self.file_props['paused'] = False
|
|
self.file_props['continue_cb'] = self.continue_paused_transfer
|
|
self.file_props['stalled'] = False
|
|
Socks5.__init__(self, idlequeue, streamhost['host'], int(streamhost['port']),
|
|
streamhost['initiator'], streamhost['target'], sid)
|
|
|
|
def read_timeout(self):
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
if self.state > 5:
|
|
# no activity for foo seconds
|
|
if self.file_props['stalled'] == False:
|
|
self.file_props['stalled'] = True
|
|
if not self.file_props.has_key('received-len'):
|
|
self.file_props['received-len'] = 0
|
|
self.queue.process_result(-1, self)
|
|
if READ_TIMEOUT > 0:
|
|
self.idlequeue.set_read_timeout(self.fd, READ_TIMEOUT)
|
|
else:
|
|
# stop transfer, there is no error code for this
|
|
self.pollend()
|
|
else:
|
|
self.queue.reconnect_receiver(self, self.streamhost)
|
|
|
|
def connect(self):
|
|
''' create the socket and plug it to the idlequeue '''
|
|
for ai in self.ais:
|
|
try:
|
|
self._sock=socket.socket(*ai[:3])
|
|
# this will not block the GUI
|
|
self._sock.setblocking(False)
|
|
self._server=ai[4]
|
|
break
|
|
except:
|
|
if sys.exc_value[0] == errno.EINPROGRESS:
|
|
break
|
|
#for all errors, we try other addresses
|
|
continue
|
|
self.fd = self._sock.fileno()
|
|
self.state = 0 # about to be connected
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
self.do_connect()
|
|
self.idlequeue.set_read_timeout(self.fd, CONNECT_TIMEOUT)
|
|
return None
|
|
|
|
def _is_connected(self):
|
|
if self.state < 5:
|
|
return False
|
|
return True
|
|
def pollout(self):
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
if self.state == 0:
|
|
self.do_connect()
|
|
return
|
|
elif self.state == 1: # send initially: version and auth types
|
|
self.send_raw(self._get_auth_buff())
|
|
elif self.state == 3: # send 'connect' request
|
|
self.send_raw(self._get_request_buff(self._get_sha1_auth()))
|
|
elif self.file_props['type'] != 'r':
|
|
if self.file_props['paused'] == True:
|
|
self.idlequeue.plug_idle(self, False, False)
|
|
return
|
|
result = self.write_next()
|
|
self.queue.process_result(result, self)
|
|
return
|
|
self.state += 1
|
|
# unplug and plug for reading
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
self.idlequeue.set_read_timeout(self.fd, CONNECT_TIMEOUT)
|
|
|
|
def pollend(self):
|
|
if self.state >= 5:
|
|
# error during transfer
|
|
self.disconnect()
|
|
self.file_props['error'] = -1
|
|
self.queue.process_result(-1, self)
|
|
else:
|
|
self.queue.reconnect_receiver(self, self.streamhost)
|
|
|
|
def pollin(self):
|
|
self.idlequeue.remove_timeout(self.fd)
|
|
if self.connected:
|
|
if self.file_props['paused']:
|
|
self.idlequeue.plug_idle(self, False, False)
|
|
return
|
|
if self.state < 5:
|
|
self.idlequeue.set_read_timeout(self.fd, CONNECT_TIMEOUT)
|
|
result = self.main(0)
|
|
self.queue.process_result(result, self)
|
|
elif self.state == 5: # wait for proxy reply
|
|
pass
|
|
elif self.file_props['type'] == 'r':
|
|
self.idlequeue.set_read_timeout(self.fd, STALLED_TIMEOUT)
|
|
result = self.get_file_contents(0)
|
|
self.queue.process_result(result, self)
|
|
|
|
else:
|
|
self.disconnect()
|
|
|
|
def do_connect(self):
|
|
try:
|
|
self._sock.connect(self._server)
|
|
self._sock.setblocking(False)
|
|
self._send=self._sock.send
|
|
self._recv=self._sock.recv
|
|
except Exception, ee:
|
|
(errnum, errstr) = ee
|
|
self.connect_timeout += 1
|
|
if errnum == 111 or self.connect_timeout > 1000:
|
|
self.queue._connection_refused(self.streamhost,
|
|
self.file_props, self.queue_idx)
|
|
return None
|
|
# win32 needs this
|
|
elif errnum not in (10056, EISCONN) or self.state != 0:
|
|
return None
|
|
else: # socket is already connected
|
|
self._sock.setblocking(False)
|
|
self._send=self._sock.send
|
|
self._recv=self._sock.recv
|
|
self.buff = ''
|
|
self.connected = True
|
|
self.file_props['connected'] = True
|
|
self.file_props['disconnect_cb'] = self.disconnect
|
|
self.state = 1 # connected
|
|
|
|
# stop all others connections to sender's streamhosts
|
|
self.queue._socket_connected(self.streamhost, self.file_props)
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
return 1 # we are connected
|
|
|
|
def main(self, timeout = 0):
|
|
''' begin negotiation. on success 'address' != 0 '''
|
|
result = 1
|
|
buff = self.receive()
|
|
if buff == '':
|
|
# end connection
|
|
self.pollend()
|
|
return
|
|
|
|
if self.state == 2: # read auth response
|
|
if buff is None or len(buff) != 2:
|
|
return None
|
|
version, method = struct.unpack('!BB', buff[:2])
|
|
if version != 0x05 or method == 0xff:
|
|
self.disconnect()
|
|
elif self.state == 4: # get approve of our request
|
|
if buff == None:
|
|
return None
|
|
sub_buff = buff[:4]
|
|
if len(sub_buff) < 4:
|
|
return None
|
|
version, command, rsvd, address_type = struct.unpack('!BBBB', buff[:4])
|
|
addrlen, address, port = 0, 0, 0
|
|
if address_type == 0x03:
|
|
addrlen = ord(buff[4])
|
|
address = struct.unpack('!%ds' % addrlen, buff[5:addrlen + 5])
|
|
portlen = len(buff[addrlen + 5:])
|
|
if portlen == 1:
|
|
port, = struct.unpack('!B', buff[addrlen + 5])
|
|
elif portlen == 2:
|
|
port, = struct.unpack('!H', buff[addrlen + 5:])
|
|
else: # Gaim bug :)
|
|
port, = struct.unpack('!H', buff[addrlen + 5:addrlen + 7])
|
|
self.remaining_buff = buff[addrlen + 7:]
|
|
self.state = 5 # for senders: init file_props and send '\n'
|
|
if self.queue.on_success:
|
|
result = self.queue.send_success_reply(self.file_props,
|
|
self.streamhost)
|
|
if result == 0:
|
|
self.state = 8
|
|
self.disconnect()
|
|
|
|
# for senders: init file_props
|
|
if result == 1 and self.state == 5:
|
|
if self.file_props['type'] == 's':
|
|
self.file_props['error'] = 0
|
|
self.file_props['disconnect_cb'] = self.disconnect
|
|
self.file_props['started'] = True
|
|
self.file_props['completed'] = False
|
|
self.file_props['paused'] = False
|
|
self.file_props['stalled'] = False
|
|
self.file_props['elapsed-time'] = 0
|
|
self.file_props['last-time'] = self.idlequeue.current_time()
|
|
self.file_props['received-len'] = 0
|
|
self.pauses = 0
|
|
# start sending file contents to socket
|
|
self.idlequeue.set_read_timeout(self.fd, STALLED_TIMEOUT)
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
else:
|
|
# receiving file contents from socket
|
|
self.idlequeue.plug_idle(self, False, True)
|
|
self.file_props['continue_cb'] = self.continue_paused_transfer
|
|
# we have set up the connection, next - retrieve file
|
|
self.state = 6
|
|
if self.state < 5:
|
|
self.idlequeue.plug_idle(self, True, False)
|
|
self.state += 1
|
|
return None
|
|
|
|
def disconnect(self, cb = True):
|
|
''' Closes the socket. Remove self from queue if cb is True'''
|
|
# close connection
|
|
Socks5.disconnect(self)
|
|
if cb is True:
|
|
self.file_props['disconnect_cb'] = None
|
|
if self.queue is not None:
|
|
self.queue.remove_receiver(self.queue_idx, False)
|