311 lines
8.7 KiB
Python
311 lines
8.7 KiB
Python
## common/xmpp/socks5.py
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##
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## Gajim Team:
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## - Yann Le Boulanger <asterix@lagaule.org>
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## - Vincent Hanquez <tab@snarc.org>
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## - Nikos Kouremenos <nkour@jabber.org>
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## - Dimitur Kirov <dkirov@gmail.com>
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##
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## Copyright (C) 2003-2005 Gajim Team
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##
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## This program 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 2 only.
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##
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## This program 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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import socket
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import select
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try:
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import fcntl
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except:
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pass
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import struct
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import sha
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class SocksQueue:
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''' queue for all file requests objects '''
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def __init__(self, complete_transfer_cb = None, \
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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.idx = 0
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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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def start_listener(self):
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Socks5Sender()
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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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# we don't need blocking sockets anymore
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# this unblocks ui!
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sock5_receiver._sock.setblocking(False)
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return result
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def add_file_props(self, account, file_props):
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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 get_file_props(self, account, 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(id):
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return fl_props[id]
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return None
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def process(self, timeout=0):
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''' process all file requests '''
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for idx in self.readers.keys():
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receiver = self.readers[idx]
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if receiver.connected:
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if receiver.file_props['paused']:
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continue
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if receiver.pending_data():
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result = receiver.get_file_contents(timeout)
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if result in [0, -1] and \
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self.complete_transfer_cb is not None:
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self.complete_transfer_cb(receiver.account,
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receiver.file_props)
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elif self.progress_transfer_cb is not None:
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self.progress_transfer_cb(receiver.account,
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receiver.file_props)
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else:
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self.remove_receiver(idx)
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def remove_receiver(self, idx):
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if idx != -1:
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if self.readers.has_key(idx):
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del(self.readers[idx])
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if self.connected > 0:
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self.connected -= 1
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class Socks5:
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def __init__(self, host, port, initiator, target, sid):
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self.host = socket.gethostbyname(host)
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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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def connect(self):
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self._sock=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self._sock.connect((self.host, self.port))
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self._sock.setblocking(True)
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self._send=self._sock.sendall
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self._recv=self._sock.recv
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self.connected = True
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return self.send_connect()
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def receive(self):
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''' Reads all pending incoming data.
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Calls owner's disconnected() method if appropriate.'''
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try:
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received = self._recv(64)
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except:
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received = ''
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while self.pending_data():
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try:
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add = self._recv(64)
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except:
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add=''
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received +=add
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if not add:
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break
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if len(received) == 0:
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self.disconnect()
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return received
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def send_raw(self,raw_data):
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''' Writes raw outgoing data. Blocks until done.
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If supplied data is unicode string, encodes it to utf-8 before send.'''
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try:
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self._send(raw_data)
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except:
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self.disconnect()
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pass
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def disconnect(self):
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''' Closes the socket. '''
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if 'fcntl' in globals():
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fcntl.fcntl(self._sock, fcntl.F_SETFL, 0);
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self._sock.close()
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self.connected = False
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def pending_data(self,timeout=0):
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''' Returns true if there is a data ready to be read. '''
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if self._sock is None:
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return False
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try:
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return select.select([self._sock],[],[],timeout)[0]
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except:
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return False
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def pending_connection(self,timeout=0):
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''' Returns true if there is a data ready to be read. '''
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if self._sock is None:
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return False
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try:
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return select.select([],[self._sock],[],timeout)[0]
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except:
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return False
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def send_connect(self):
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''' begin negotiation. on success 'address' != 0 '''
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self.send_raw(self._get_auth_buff())
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buff = self.receive()
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version, method = struct.unpack('!BB', buff[:2])
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if version != 0x05 or method == 0xff:
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self.disconnect()
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return None
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self.send_raw(self._get_request_buff())
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buff = self.receive()
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version, command, rsvd, address_type = struct.unpack('!BBBB', buff[:4])
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addrlen, address, port = 0, 0, 0
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if address_type == 0x03:
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addrlen = ord(buff[4])
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address = struct.unpack('!%ds' % addrlen, buff[5:addrlen+5])
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portlen = len(buff[addrlen+5])
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if portlen == 1: # Gaim bug :)
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(port) = struct.unpack('!B', buff[addrlen+5])
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else:
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(port) = struct.unpack('!H', buff[addrlen+5])
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return (version, command, rsvd, address_type, addrlen, address, port)
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def _get_auth_buff(self):
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''' Message, that we support 1 one auth mechanism:
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the 'no auth' mechanism. '''
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return struct.pack('!BBB', 0x05, 0x01, 0x00)
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def _get_connect_buff(self):
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''' Connect request by domain name '''
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buff = struct.pack('!BBBBB%dsBB' % len(self.host), \
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0x05, 0x01, 0x00, 0x03, len(self.host), self.host, \
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self.port >> 8, self.port & 0xff)
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return buff
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def _get_request_buff(self):
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''' Connect request by domain name,
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sid sha, instead of domain name (jep 0096) '''
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msg = self._get_sha1_auth()
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buff = struct.pack('!BBBBB%dsBB' % len(msg), \
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0x05, 0x01, 0x00, 0x03, len(msg), msg, 0, 0)
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return buff
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def read_connect(self):
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buff = self._recv()
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version, method = struct.unpack('!BB', buff)
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if version != 0x05 or method == 0xff:
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self.disconnect()
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def _get_sha1_auth(self):
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return sha.new("%s%s%s" % (self.sid, self.initiator, self.target)).hexdigest()
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class Socks5Listener:
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def __init__(self, host, port):
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self.host, self.port
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self.queue_idx = -1
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self.queue = None
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def bind(self):
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self._serv=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self._serv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self._serv.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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self._serv.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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self._serv.bind((self.host, self.port))
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self._serv.listen(socket.SOMAXCONN)
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self.connected = False
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class Socks5Receiver(Socks5):
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def __init__(self, host, port, initiator, target, sid, file_props = None):
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self.queue_idx = -1
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self.queue = None
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self.file_props = file_props
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if file_props:
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file_props['disconnect_cb'] = self.disconnect
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file_props['error'] = 0
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self.file_props['completed'] = False
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self.file_props['paused'] = False
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Socks5.__init__(self, host, port, initiator, target, sid)
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def get_file_contents(self, timeout):
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''' read file contents from socket and write them to file "'''
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if self.file_props is None or \
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self.file_props.has_key('file-name') is False:
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return
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#TODO error
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while self.pending_data(timeout):
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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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fd = open(self.file_props['file-name'],'w')
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self.file_props['fd'] = fd
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self.file_props['received-len'] = 0
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try:
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buff = self._recv(65536)
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except:
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buff = ''
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self.file_props['received-len'] += len(buff)
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fd.write(buff)
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if len(buff) == 0:
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# Transfer stopped somehow:
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# reset, paused or network error
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fd.close()
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try:
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# file is not complete, remove it
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os.remove(self.file_props['file-name'])
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except:
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# unable to remove the incomplete file
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pass
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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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if self.file_props['received-len'] == int(self.file_props['size']):
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# transfer completed
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fd.close()
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self.disconnect()
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self.file_props['error'] = 0
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self.file_props['completed'] = True
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return 0
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# return number of read bytes. It can be used in progressbar
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return self.file_props['received-len']
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def disconnect(self):
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''' Closes the socket. '''
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# close connection and remove us from the queue
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if 'fcntl' in globals():
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fcntl.fcntl(self._sock, fcntl.F_SETFL, 0);
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self._sock.close()
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self.connected = False
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self.file_props['disconnect_cb'] = None
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if self.queue is not None:
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self.queue.remove_receiver(self.queue_idx)
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