1165 lines
42 KiB
Python
1165 lines
42 KiB
Python
# -*- coding:utf-8 -*-
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## src/common/socks5.py
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##
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## Copyright (C) 2005-2006 Dimitur Kirov <dkirov AT gmail.com>
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## Nikos Kouremenos <kourem AT gmail.com>
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## Copyright (C) 2005-2010 Yann Leboulanger <asterix AT lagaule.org>
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## Copyright (C) 2006-2008 Jean-Marie Traissard <jim AT lapin.org>
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## Copyright (C) 2008 Jonathan Schleifer <js-gajim AT webkeks.org>
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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 hashlib
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import os
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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 errno import EINPROGRESS
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from errno import EAFNOSUPPORT
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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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"""
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Queue for all file requests objects
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"""
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def __init__(self, idlequeue, complete_transfer_cb=None,
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progress_transfer_cb=None, error_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.error_cb = error_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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"""
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Start waiting for incomming connections on (host, port) and do a socks5
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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 is 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 callback and fail
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self.error_cb(_('Unable to bind to port %s.') % port,
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_('Maybe you have another running instance of Gajim. File '
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'Transfer will be cancelled.'))
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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 'streamhost-used' in file_props and \
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file_props['streamhost-used'] is True:
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if 'proxyhosts' in file_props:
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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 'streamhosts' in file_props:
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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, 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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"""
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Called when there is a host connected to one of the senders's
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streamhosts. Stop othere attempts for connections
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"""
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for host in file_props['streamhosts']:
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if host != streamhost and 'idx' in host:
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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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"""
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Check the state of all streamhosts and if all has failed, then emit
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connection failure cb. If there are some which are still not connected
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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 'idx' in host:
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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'],
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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 'received-len' not in file_props 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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"""
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Called when we loose connection during transfer
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"""
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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 'streamhosts' in file_props:
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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 'failure_cb' in file_props 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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"""
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Add new file request
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"""
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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 is not 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 'hash' in file_props and file_props['hash'] in self.senders:
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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 sha_str in self.sha_handlers:
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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 idx not in self.readers:
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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 'hash' in file_props and file_props['hash'] in self.senders:
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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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"""
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File_prop to the dict of current file_props. It is identified by account
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name and sid
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"""
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if file_props is None or ('sid' in file_props) is False:
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return
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_id = file_props['sid']
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if account not in self.files_props:
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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 account in self.files_props:
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fl_props = self.files_props[account]
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if sid in fl_props:
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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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"""
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Get fil_prop by account name and session id
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"""
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if account in self.files_props:
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fl_props = self.files_props[account]
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if sid in fl_props:
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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 sock_hash not in self.senders:
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self.senders[sock_hash] = Socks5Sender(self.idlequeue, sock_hash, self,
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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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"""
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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 'tt_account' in actor.file_props:
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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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"""
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Remove reciver from the list and decrease the number of active
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connections with 1
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"""
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if idx != -1:
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if idx in self.readers:
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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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"""
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Remove sender from the list of senders and decrease the number of active
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connections with 1
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"""
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if idx != -1:
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if idx in self.senders:
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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,
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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 is None:
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try:
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self.file = open(self.file_props['file-name'], 'rb')
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if 'offset' in self.file_props 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 Exception:
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pass
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self.file = None
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def get_fd(self):
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"""
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Test if file is already open and return its fd, or just open the file and
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return the fd
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"""
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if 'fd' in self.file_props:
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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 'offset' in self.file_props 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 'fd' in self.file_props:
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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 Exception:
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pass
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def receive(self):
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"""
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Read small chunks of data. Call owner's disconnected() method if
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appropriate
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"""
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received = ''
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try:
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add = self._recv(64)
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except Exception:
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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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"""
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Write raw outgoing data
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"""
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try:
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self._send(raw_data)
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except Exception:
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self.disconnect()
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return len(raw_data)
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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)
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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:]
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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
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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
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|
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def get_file_contents(self, timeout):
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"""
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Read file contents from socket and write them to file
|
|
"""
|
|
if self.file_props is None or ('file-name' in self.file_props) is False:
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self.file_props['error'] = -2
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return None
|
|
fd = None
|
|
if self.remaining_buff != '':
|
|
try:
|
|
fd = self.get_fd()
|
|
except IOError, e:
|
|
self.disconnect(False)
|
|
self.file_props['error'] = -6 # file system error
|
|
return 0
|
|
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:
|
|
try:
|
|
fd = self.get_fd()
|
|
except IOError, e:
|
|
self.disconnect(False)
|
|
self.file_props['error'] = -6 # file system error
|
|
return 0
|
|
try:
|
|
buff = self._recv(MAX_BUFF_LEN)
|
|
except Exception:
|
|
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 is not None:
|
|
self.file_props['stalled'] = False
|
|
if fd is None and self.file_props['stalled'] is False:
|
|
return None
|
|
if 'received-len' in self.file_props:
|
|
if self.file_props['received-len'] != 0:
|
|
return self.file_props['received-len']
|
|
return None
|
|
|
|
def disconnect(self):
|
|
"""
|
|
Close 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 Exception:
|
|
# 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:
|
|
num_auth = struct.unpack('!xB', buff[:2])[0]
|
|
for i in xrange(num_auth):
|
|
mechanism, = struct.unpack('!B', buff[1 + i])
|
|
auth_mechanisms.append(mechanism)
|
|
except Exception:
|
|
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
|
|
req_type, host_type, = struct.unpack('!xBxB', buff[:4])
|
|
if host_type == 0x01:
|
|
host_arr = struct.unpack('!iiii', buff[4:8])
|
|
host, = '.'.join(str(s) for s in 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 Exception:
|
|
return (None, None, None)
|
|
return (req_type, host, port)
|
|
|
|
def read_connect(self):
|
|
"""
|
|
Connect response: version, auth method
|
|
"""
|
|
buff = self._recv()
|
|
try:
|
|
version, method = struct.unpack('!BB', buff)
|
|
except Exception:
|
|
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 'is_a_proxy' in self.file_props:
|
|
del(self.file_props['is_a_proxy'])
|
|
return hashlib.sha1('%s%s%s' % (self.sid,
|
|
self.file_props['proxy_sender'],
|
|
self.file_props['proxy_receiver'])).hexdigest()
|
|
return hashlib.sha1('%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 = self._parse_request_buff(buff)[:2]
|
|
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):
|
|
"""
|
|
Close 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.ais.sort(reverse=True) # Try IPv6 first
|
|
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.)
|
|
try:
|
|
self._serv = socket.socket(*ai[:3])
|
|
except socket.error, e:
|
|
if e.args[0] == EAFNOSUPPORT:
|
|
self.ai = None
|
|
continue
|
|
raise
|
|
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)
|
|
# Under windows Vista, we need that to listen on ipv6 AND ipv4
|
|
# Doesn't work under windows XP
|
|
if os.name == 'nt':
|
|
ver = os.sys.getwindowsversion()
|
|
if (ver[3], ver[0], ver[1]) == (2, 6, 0):
|
|
# 27 is socket.IPV6_V6ONLY under windows, but not defined ...
|
|
self._serv.setsockopt(socket.IPPROTO_IPV6, 27, 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 Exception:
|
|
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 Exception:
|
|
pass
|
|
|
|
def accept_conn(self):
|
|
"""
|
|
Accept 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 'received-len' not in self.file_props:
|
|
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
|
|
"""
|
|
if self.ais is None:
|
|
return None
|
|
|
|
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 socket.error, e:
|
|
if not isinstance(e, basestring) and e[0] == EINPROGRESS:
|
|
break
|
|
# for all other 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']:
|
|
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 = ee[0]
|
|
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 is None:
|
|
return None
|
|
sub_buff = buff[:4]
|
|
if len(sub_buff) < 4:
|
|
return None
|
|
version, address_type = struct.unpack('!BxxB', buff[:4])
|
|
addrlen = 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):
|
|
"""
|
|
Close 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)
|