def recv_query_reply(self, permid, message, selversion):
if selversion < OLPROTO_VER_SIXTH:
return False
try:
d = bdecode(message[1:])
except:
if DEBUG:
print >> sys.stderr, 'rquery: Cannot bdecode QUERY_REPLY message', selversion
return False
if not isValidQueryReply(d, selversion):
if DEBUG:
print >> sys.stderr, 'rquery: not valid QUERY_REPLY message', selversion
return False
queryrec = self.is_registered_query_id(d['id'])
if not queryrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has unknown query ID', selversion
return False
if selversion >= OLPROTO_VER_TWELFTH:
if queryrec['query'].startswith('SIMPLE+METADATA'):
for infohash, torrentrec in d['a'].iteritems():
if 'metatype' not in torrentrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has no metatype field', selversion
return False
if 'metadata' not in torrentrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has no metadata field', selversion
return False
if torrentrec['torrent_size'] != len(
torrentrec['metadata']):
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY torrent_size != len metadata', selversion
return False
try:
if torrentrec['metatype'] == URL_MIME_TYPE:
tdef = TorrentDef.load_from_url(
torrentrec['metadata'])
else:
metainfo = bdecode(torrentrec['metadata'])
tdef = TorrentDef.load_from_dict(metainfo)
except:
if DEBUG:
print_exc()
return False
self.process_query_reply(permid, queryrec['query'],
queryrec['usercallback'], d)
return True
def got_ask_for_help(self, permid, message, selversion):
try:
infohash = message[1:21]
challenge = bdecode(message[21:])
except:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: bad data in ask_for_help'
return False
if len(infohash) != 20:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: bad infohash in ask_for_help'
return False
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: received a help request from', show_permid_short(permid), 'with challenge', challenge
self.received_challenges[permid] = challenge
helper_obj = self.session.lm.get_coopdl_role_object(infohash, COOPDL_ROLE_HELPER)
if helper_obj is None:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: There is no current download for this infohash. A new download must be started.'
self.start_helper_download(permid, infohash, selversion)
return
network_got_ask_for_help_lambda = lambda : self.network_got_ask_for_help(permid, infohash)
self.session.lm.rawserver.add_task(network_got_ask_for_help_lambda, 0)
return True
def getStatus(url, info_hash):
try:
resp = timeouturlopen.urlOpenTimeout(url, timeout=HTTP_TIMEOUT)
response = resp.read()
except IOError:
return (-1, -1)
except AttributeError:
return (-2, -2)
try:
response_dict = bdecode(response)
except:
return (-2, -2)
try:
status = response_dict['files'][info_hash]
seeder = status['complete']
if seeder < 0:
seeder = 0
leecher = status['incomplete']
if leecher < 0:
leecher = 0
except KeyError:
try:
if response_dict.has_key('flags'):
if response_dict['flags'].has_key('min_request_interval'):
return (-3, -3)
except:
pass
return (-2, -2)
return (seeder, leecher)
def got_ask_for_help(self, permid, message, selversion):
try:
infohash = message[1:21]
challenge = bdecode(message[21:])
except:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: bad data in ask_for_help'
return False
if len(infohash) != 20:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: bad infohash in ask_for_help'
return False
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: received a help request from', show_permid_short(
permid), 'with challenge', challenge
self.received_challenges[permid] = challenge
helper_obj = self.session.lm.get_coopdl_role_object(
infohash, COOPDL_ROLE_HELPER)
if helper_obj is None:
if DEBUG:
print >> sys.stderr, 'helper: got_ask_for_help: There is no current download for this infohash. A new download must be started.'
self.start_helper_download(permid, infohash, selversion)
return
network_got_ask_for_help_lambda = lambda: self.network_got_ask_for_help(
permid, infohash)
self.session.lm.rawserver.add_task(network_got_ask_for_help_lambda, 0)
return True
def gotUdpConnectRequest(self, permid, selversion, channel_id, mh_msg, reply_callback):
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotUdpConnectRequest from', show_permid_short(permid)
try:
mh_data = bdecode(mh_msg)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: bad encoded data:', mh_msg
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotUdpConnectRequest is', mh_data
try:
request_id, host, port = mh_data.split(':')
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in received data:', mh_data
return False
coordinator = (host, int(port))
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: coordinator address is', coordinator
mhr_data = request_id + ':' + tryConnect(coordinator)
try:
mhr_msg = bencode(mhr_data)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in encoding data:', mhr_data
return False
reply_callback(mhr_msg, callback=self.udpConnectReplySendCallback)
def _decodeGETSUBSMessage(self, message):
try:
values = bdecode(message[1:])
except:
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Error bdecoding message'
return None
if len(values) != 3:
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Invalid number of fields in GET_SUBS'
return None
channel_id, infohash, bitmask = values[0], values[1], values[2]
if not validPermid(channel_id):
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Invalid channel_id in GET_SUBS'
return None
if not validInfohash(infohash):
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Invalid infohash in GET_SUBS'
return None
if not isinstance(bitmask, str) or not len(bitmask) == 4:
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Invalid bitmask in GET_SUBS'
return None
try:
bitmask, = unpack('!L', bitmask)
languages = self._languagesUtility.maskToLangCodes(bitmask)
except:
if DEBUG:
print >> sys.stderr, SUBS_LOG_PREFIX + 'Invalid bitmask in GET_SUBS'
return None
return (channel_id, infohash, languages)
def add_metadata_piece(self, piece, data):
if not self._closed:
for index, block_tuple in zip(xrange(len(self._metadata_blocks)), self._metadata_blocks):
if block_tuple[1] == piece:
block_tuple[0] = max(0, block_tuple[0] - 1)
block_tuple[2] = data
self._metadata_blocks.sort()
break
for requested, piece, data in self._metadata_blocks:
if data is None:
break
else:
metadata_blocks = [ (piece, data) for _, piece, data in self._metadata_blocks ]
metadata_blocks.sort()
metadata = ''.join([ data for _, data in metadata_blocks ])
info_hash = sha(metadata).digest()
if info_hash == self._info_hash:
if DEBUG:
print >> sys.stderr, 'MiniBitTorrent.add_metadata_piece() Done!'
peers = [ (timestamp, address) for address, timestamp in self._good_peers.iteritems() ]
peers.sort(reverse=True)
peers = [ address for _, address in peers ]
self._callback(bdecode(metadata), peers)
else:
if DEBUG:
print >> sys.stderr, 'MiniBitTorrent.add_metadata_piece() Failed hashcheck! Restarting all over again :('
self._metadata_blocks = [ [requested, piece, None] for requested, piece, data in self._metadata_blocks ]
def _read(stream):
bdata = stream.read()
stream.close()
protected = False
# Path anonym 04.11.2013
if bdata[:8] == chr(1) + chr(2) + chr(3) + chr(4) + chr(17) + chr(2) + chr(101) + chr(46):
bdata = bdata[8:]
bdata = m2_AES_decrypt(bdata, '%E0(tK8r]8KKU=crz!Vuex0b#I)H+!0n}%f0]L_x0ch++?-<#YHwXkvM6UL')
protected = True
elif bdata[:4] == chr(1) + chr(2) + chr(3) + chr(4):
bdata = bdata[4:]
# end Path anonym 04.11.2013
bdata = m2_AES_decrypt(bdata, 'tslive_key')
protected = True
elif bdata[:4] == chr(17) + chr(2) + chr(101) + chr(46):
bdata = bdata[4:]
bdata = m2_AES_decrypt(bdata, '=Atl6GD#Vb+#QwW9zJy34lBOcM-7R7G)')
protected = True
data = bdecode(bdata, params={'use_ordered_dict': True})
if not data.has_key('info') and data.has_key('qualities'):
return MultiTorrent._create(data, protected)
else:
return TorrentDef._create(data, protected)
def run(self):
announce = self._tracker + '?' + urlencode({'info_hash': self._swarm.get_info_hash(),
'peer_id': self._swarm.get_peer_id(),
'port': '12345',
'compact': '1',
'uploaded': '0',
'downloaded': '0',
'left': '-1',
'event': 'started'})
handle = urlopen(announce)
if handle:
body = handle.read()
if body:
try:
body = bdecode(body)
except:
pass
else:
peers = []
peer_data = body['peers']
for x in range(0, len(peer_data), 6):
key = peer_data[x:x + 6]
ip = '.'.join([ str(ord(i)) for i in peer_data[x:x + 4] ])
port = ord(peer_data[x + 4]) << 8 | ord(peer_data[x + 5])
peers.append((ip, port))
if DEBUG:
print >> sys.stderr, 'MiniTracker.run() received', len(peers), 'peer addresses from tracker'
self._swarm.add_potential_peers(peers)
def gotUdpConnectRequest(self, permid, selversion, channel_id, mh_msg,
reply_callback):
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotUdpConnectRequest from', show_permid_short(
permid)
try:
mh_data = bdecode(mh_msg)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: bad encoded data:', mh_msg
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotUdpConnectRequest is', mh_data
try:
request_id, host, port = mh_data.split(':')
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in received data:', mh_data
return False
coordinator = (host, int(port))
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: coordinator address is', coordinator
mhr_data = request_id + ':' + tryConnect(coordinator)
try:
mhr_msg = bencode(mhr_data)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in encoding data:', mhr_data
return False
reply_callback(mhr_msg, callback=self.udpConnectReplySendCallback)
def recv_query_reply(self, permid, message, selversion):
if selversion < OLPROTO_VER_SIXTH:
return False
try:
d = bdecode(message[1:])
except:
if DEBUG:
print >> sys.stderr, 'rquery: Cannot bdecode QUERY_REPLY message', selversion
return False
if not isValidQueryReply(d, selversion):
if DEBUG:
print >> sys.stderr, 'rquery: not valid QUERY_REPLY message', selversion
return False
queryrec = self.is_registered_query_id(d['id'])
if not queryrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has unknown query ID', selversion
return False
if selversion >= OLPROTO_VER_TWELFTH:
if queryrec['query'].startswith('SIMPLE+METADATA'):
for infohash, torrentrec in d['a'].iteritems():
if 'metatype' not in torrentrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has no metatype field', selversion
return False
if 'metadata' not in torrentrec:
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY has no metadata field', selversion
return False
if torrentrec['torrent_size'] != len(torrentrec['metadata']):
if DEBUG:
print >> sys.stderr, 'rquery: QUERY_REPLY torrent_size != len metadata', selversion
return False
try:
if torrentrec['metatype'] == URL_MIME_TYPE:
tdef = TorrentDef.load_from_url(torrentrec['metadata'])
else:
metainfo = bdecode(torrentrec['metadata'])
tdef = TorrentDef.load_from_dict(metainfo)
except:
if DEBUG:
print_exc()
return False
self.process_query_reply(permid, queryrec['query'], queryrec['usercallback'], d)
return True
def deserialize(encoded):
if not encoded:
raise InvalidPOAException('Cannot deserialize nothing')
try:
lst = bdecode(encoded)
if len(lst) < 5:
raise InvalidPOAException('Too few entries (got %d, expected 5)' % len(lst))
return POA(lst[0], lst[1], lst[2], expire_time=lst[3], signature=lst[4])
except Exception as e:
raise InvalidPOAException('De-serialization failed (%s)' % e)
def check_challenge(cdata):
try:
randomB = bdecode(cdata)
except:
return None
if len(randomB) != num_random_bits / 8:
return None
else:
return randomB
def check_challenge(cdata):
try:
randomB = bdecode(cdata)
except:
return None
if len(randomB) != num_random_bits / 8:
return None
else:
return randomB
def got_request_pieces(self, permid, message, selversion):
try:
infohash = message[1:21]
pieces = bdecode(message[21:])
except:
print >> sys.stderr, 'helper: got_request_pieces: bad data in REQUEST_PIECES'
return False
network_got_request_pieces_lambda = lambda : self.network_got_request_pieces(permid, message, selversion, infohash, pieces)
self.session.lm.rawserver.add_task(network_got_request_pieces_lambda, 0)
return True
def handleMessage(self, permid, selversion, message):
if selversion < OLPROTO_VER_SEVENTH:
if DEBUG:
print >> sys.stderr, 'friendship: Got FRIENDSHIP msg from peer with old protocol', show_permid_short(permid)
return False
try:
d = bdecode(message[1:])
except:
print_exc()
return False
return self.process_message(permid, selversion, d)
def valid_metadata(self, infohash, metadata):
try:
metainfo = bdecode(metadata)
tdef = TorrentDef.load_from_dict(metainfo)
got_infohash = tdef.get_infohash()
if infohash != got_infohash:
print >> sys.stderr, "metadata: infohash doesn't match the torrent " + 'hash. Required: ' + ` infohash ` + ', but got: ' + ` got_infohash `
return False
return True
except:
print_exc()
return False
def valid_metadata(self, infohash, metadata):
try:
metainfo = bdecode(metadata)
tdef = TorrentDef.load_from_dict(metainfo)
got_infohash = tdef.get_infohash()
if infohash != got_infohash:
print >> sys.stderr, "metadata: infohash doesn't match the torrent " + 'hash. Required: ' + `infohash` + ', but got: ' + `got_infohash`
return False
return True
except:
print_exc()
return False
def readTorrent(self, torrent):
try:
torrent_path = torrent['torrent_path']
f = open(torrent_path, 'rb')
_data = f.read()
f.close()
data = bdecode(_data)
del data['info']
torrent['info'] = data
return torrent
except Exception:
return torrent
def recv_overlap(self, permid, message, selversion):
try:
oldict = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'socnet: SOCIAL_OVERLAP: error becoding'
return False
if not isValidDict(oldict, permid):
return False
self.process_overlap(permid, oldict)
return True
def got_request_pieces(self, permid, message, selversion):
try:
infohash = message[1:21]
pieces = bdecode(message[21:])
except:
print >> sys.stderr, 'helper: got_request_pieces: bad data in REQUEST_PIECES'
return False
network_got_request_pieces_lambda = lambda: self.network_got_request_pieces(
permid, message, selversion, infohash, pieces)
self.session.lm.rawserver.add_task(network_got_request_pieces_lambda,
0)
return True
def got_proxy_have(self, permid, message, selversion):
if DEBUG:
print >> sys.stderr, 'coordinator: network_got_proxy_have: got_proxy_have'
try:
infohash = message[1:21]
aggregated_string = bdecode(message[21:])
except:
print >> sys.stderr, 'coordinator: network_got_proxy_have: warning - bad data in PROXY_HAVE'
return False
network_got_proxy_have_lambda = lambda : self.network_got_proxy_have(permid, infohash, selversion, aggregated_string)
self.launchmany.rawserver.add_task(network_got_proxy_have_lambda, 0)
return True
def recv_overlap(self, permid, message, selversion):
try:
oldict = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'socnet: SOCIAL_OVERLAP: error becoding'
return False
if not isValidDict(oldict, permid):
return False
self.process_overlap(permid, oldict)
return True
def got_dropped_piece(self, permid, message, selversion):
if DEBUG:
print >> sys.stderr, 'coordinator: got_dropped_piece'
try:
infohash = message[1:21]
piece = bdecode(message[22:])
except:
print >> sys.stderr, 'coordinator warning: bad data in DROPPED_PIECE'
return False
network_got_dropped_piece_lambda = lambda : self.network_got_dropped_piece(permid, infohash, peice, selversion)
self.launchmany.rawserver.add_task(network_got_dropped_piece_lambda, 0)
return True
def handleMessage(self, permid, selversion, message):
if selversion < OLPROTO_VER_SEVENTH:
if DEBUG:
print >> sys.stderr, 'friendship: Got FRIENDSHIP msg from peer with old protocol', show_permid_short(
permid)
return False
try:
d = bdecode(message[1:])
except:
print_exc()
return False
return self.process_message(permid, selversion, d)
def read_and_send_metadata(self, permid, infohash, torrent_path,
selversion):
torrent_data = self.read_torrent(torrent_path)
if torrent_data:
try:
metainfo = bdecode(torrent_data)
if 'info' in metainfo and 'private' in metainfo[
'info'] and metainfo['info']['private']:
if DEBUG:
print >> sys.stderr, 'metadata: Not sending torrent', ` torrent_path `, 'because it is private'
return 0
except:
print_exc()
return 0
if DEBUG:
print >> sys.stderr, 'metadata: sending torrent', ` torrent_path `, len(
torrent_data)
torrent = {}
torrent['torrent_hash'] = infohash
tdef = TorrentDef.load_from_dict(metainfo)
if selversion >= OLPROTO_VER_ELEVENTH and tdef.get_url_compat():
torrent['metatype'] = URL_MIME_TYPE
torrent['metadata'] = tdef.get_url()
else:
torrent['metatype'] = TSTREAM_MIME_TYPE
torrent['metadata'] = torrent_data
if selversion >= OLPROTO_VER_FOURTH:
data = self.torrent_db.getTorrent(infohash)
if data is None:
return 0
nleechers = data.get('leecher', -1)
nseeders = data.get('seeder', -1)
last_check_ago = int(time()) - data.get('last_check_time', 0)
if last_check_ago < 0:
last_check_ago = 0
status = data.get('status', 'unknown')
torrent.update({
'leecher': nleechers,
'seeder': nseeders,
'last_check_time': last_check_ago,
'status': status
})
return self.do_send_metadata(permid, torrent, selversion)
else:
self.torrent_db.deleteTorrent(infohash,
delete_file=True,
commit=True)
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: no torrent data to send'
return 0
def gotNatCheckReplyMessage(self, permid, selversion, channel_id, channel_data, error, payload, request_callback):
if error:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotNatCheckReplyMessage'
print >> sys.stderr, 'NatCheckMsgHandler: error', error
self._file.write('; '.join((strftime('%Y/%m/%d %H:%M:%S'),
' REPLY',
show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
'ERROR(%d)' % error,
payload,
'\n')))
self._file.flush()
else:
try:
recv_data = bdecode(payload)
except:
print_exc()
print >> sys.stderr, 'bad encoded data:', payload
return False
try:
self.validNatCheckReplyMsg(recv_data)
except RuntimeError as e:
print >> sys.stderr, e
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: received NAT_CHECK_REPLY message: ', recv_data
self._file.write('; '.join((strftime('%Y/%m/%d %H:%M:%S'),
' REPLY',
show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
':'.join([ str(x) for x in recv_data ]),
'\n')))
self._file.flush()
if selversion < OLPROTO_VER_NINETH:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: freestream version too old for NATTRAVERSAL: do nothing'
return True
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: do NATTRAVERSAL'
if len(self.peerlist) == PEERLIST_LEN:
del self.peerlist[0]
self.peerlist.append([permid, recv_data[1], recv_data[2]])
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: peerlist length is: ', len(self.peerlist)
if len(self.peerlist) >= 2:
self.tryHolePunching()
return True
def got_dropped_piece(self, permid, message, selversion):
if DEBUG:
print >> sys.stderr, 'coordinator: got_dropped_piece'
try:
infohash = message[1:21]
piece = bdecode(message[22:])
except:
print >> sys.stderr, 'coordinator warning: bad data in DROPPED_PIECE'
return False
network_got_dropped_piece_lambda = lambda: self.network_got_dropped_piece(
permid, infohash, peice, selversion)
self.launchmany.rawserver.add_task(network_got_dropped_piece_lambda, 0)
return True
def got_proxy_have(self, permid, message, selversion):
if DEBUG:
print >> sys.stderr, 'coordinator: network_got_proxy_have: got_proxy_have'
try:
infohash = message[1:21]
aggregated_string = bdecode(message[21:])
except:
print >> sys.stderr, 'coordinator: network_got_proxy_have: warning - bad data in PROXY_HAVE'
return False
network_got_proxy_have_lambda = lambda: self.network_got_proxy_have(
permid, infohash, selversion, aggregated_string)
self.launchmany.rawserver.add_task(network_got_proxy_have_lambda, 0)
return True
def isValidRemoteVal(d, selversion):
if not isinstance(d, dict):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: a: value not dict'
return False
if selversion >= OLPROTO_VER_TWELFTH:
if not ('content_name' in d and 'length' in d and 'leecher' in d
and 'seeder' in d and 'category' in d and 'torrent_size' in d
and 'channel_permid' in d and 'channel_name' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec12: key missing, got', d.keys(
)
return False
if 'metatype' in d and 'metadata' in d:
try:
metatype = d['metatype']
metadata = d['metadata']
if metatype == URL_MIME_TYPE:
tdef = TorrentDef.load_from_url(metadata)
else:
metainfo = bdecode(metadata)
tdef = TorrentDef.load_from_dict(metainfo)
except:
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec12: metadata invalid'
print_exc()
return False
elif selversion >= OLPROTO_VER_ELEVENTH:
if not ('content_name' in d and 'length' in d and 'leecher' in d
and 'seeder' in d and 'category' in d and 'torrent_size' in d
and 'channel_permid' in d and 'channel_name' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec11: key missing, got', d.keys(
)
return False
elif selversion >= OLPROTO_VER_NINETH:
if not ('content_name' in d and 'length' in d and 'leecher' in d
and 'seeder' in d and 'category' in d and 'torrent_size' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec9: key missing, got', d.keys(
)
return False
elif not ('content_name' in d and 'length' in d and 'leecher' in d
and 'seeder' in d and 'category' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec6: key missing, got', d.keys(
)
return False
return True
def check_response2(rdata2, randomA, peeridA, randomB, peeridB):
try:
response2 = bdecode(rdata2)
except:
return None
if response2['A'] != peeridA:
return None
pubB_der = response2['certB']
pubB = EC.pub_key_from_der(pubB_der)
sigB = response2['SB']
if verify_response(randomB, randomA, peeridA, pubB, sigB):
return pubB
else:
return None
def handle_crawler_request(self, permid, selversion, channel_id, message, reply_callback):
if DEBUG:
print >> sys.stderr, 'FriendshipCrawler: handle_friendship_crawler_database_query_request', message
try:
d = bdecode(message)
stats = self.getStaticsFromFriendshipStatisticsTable(self.session.get_permid(), d['current time'])
msg_dict = {'current time': d['current time'],
'stats': stats}
msg = bencode(msg_dict)
reply_callback(msg)
except Exception as e:
print_exc()
reply_callback(str(e), 1)
return True
def deserialize(encoded):
if not encoded:
raise InvalidPOAException('Cannot deserialize nothing')
try:
lst = bdecode(encoded)
if len(lst) < 5:
raise InvalidPOAException(
'Too few entries (got %d, expected 5)' % len(lst))
return POA(lst[0],
lst[1],
lst[2],
expire_time=lst[3],
signature=lst[4])
except Exception as e:
raise InvalidPOAException('De-serialization failed (%s)' % e)
def check_response2(rdata2, randomA, peeridA, randomB, peeridB):
try:
response2 = bdecode(rdata2)
except:
return None
if response2['A'] != peeridA:
return None
pubB_der = response2['certB']
pubB = EC.pub_key_from_der(pubB_der)
sigB = response2['SB']
if verify_response(randomB, randomA, peeridA, pubB, sigB):
return pubB
else:
return None
def gotNatCheckReplyMessage(self, permid, selversion, channel_id,
channel_data, error, payload,
request_callback):
if error:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotNatCheckReplyMessage'
print >> sys.stderr, 'NatCheckMsgHandler: error', error
self._file.write('; '.join(
(strftime('%Y/%m/%d %H:%M:%S'), ' REPLY', show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
'ERROR(%d)' % error, payload, '\n')))
self._file.flush()
else:
try:
recv_data = bdecode(payload)
except:
print_exc()
print >> sys.stderr, 'bad encoded data:', payload
return False
try:
self.validNatCheckReplyMsg(recv_data)
except RuntimeError as e:
print >> sys.stderr, e
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: received NAT_CHECK_REPLY message: ', recv_data
self._file.write('; '.join(
(strftime('%Y/%m/%d %H:%M:%S'), ' REPLY', show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
':'.join([str(x) for x in recv_data]), '\n')))
self._file.flush()
if selversion < OLPROTO_VER_NINETH:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: freestream version too old for NATTRAVERSAL: do nothing'
return True
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: do NATTRAVERSAL'
if len(self.peerlist) == PEERLIST_LEN:
del self.peerlist[0]
self.peerlist.append([permid, recv_data[1], recv_data[2]])
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: peerlist length is: ', len(
self.peerlist)
if len(self.peerlist) >= 2:
self.tryHolePunching()
return True
def recv_query(self, permid, message, selversion):
if selversion < OLPROTO_VER_SIXTH:
return False
try:
d = bdecode(message[1:])
except:
if DEBUG:
print >> sys.stderr, 'rquery: Cannot bdecode QUERY message'
return False
if not isValidQuery(d, selversion):
if DEBUG:
print >> sys.stderr, 'rquery: QUERY invalid', ` d `
return False
self.process_query(permid, d, selversion)
return True
def check_response1(rdata1, randomB, peeridB):
try:
response1 = bdecode(rdata1)
except:
return [None, None]
if response1['B'] != peeridB:
return [None, None]
pubA_der = response1['certA']
pubA = EC.pub_key_from_der(pubA_der)
sigA = response1['SA']
randomA = response1['rA']
if verify_response(randomA, randomB, peeridB, pubA, sigA):
return [randomA, pubA]
else:
return [None, None]
def recv_query(self, permid, message, selversion):
if selversion < OLPROTO_VER_SIXTH:
return False
try:
d = bdecode(message[1:])
except:
if DEBUG:
print >> sys.stderr, 'rquery: Cannot bdecode QUERY message'
return False
if not isValidQuery(d, selversion):
if DEBUG:
print >> sys.stderr, 'rquery: QUERY invalid', `d`
return False
self.process_query(permid, d, selversion)
return True
def check_response1(rdata1, randomB, peeridB):
try:
response1 = bdecode(rdata1)
except:
return [None, None]
if response1['B'] != peeridB:
return [None, None]
pubA_der = response1['certA']
pubA = EC.pub_key_from_der(pubA_der)
sigA = response1['SA']
randomA = response1['rA']
if verify_response(randomA, randomB, peeridB, pubA, sigA):
return [randomA, pubA]
else:
return [None, None]
def handle_crawler_reply(self, permid, selversion, channel_id, channel_data, error, message, request_callback):
if error:
if DEBUG:
print >> sys.stderr, 'friendshipcrawler: handle_crawler_reply'
print >> sys.stderr, 'friendshipcrawler: error', error, message
else:
try:
d = bdecode(message)
except Exception:
print_exc()
else:
if DEBUG:
print >> sys.stderr, 'friendshipcrawler: handle_crawler_reply'
print >> sys.stderr, 'friendshipcrawler: friendship: Got', `d`
self.saveFriendshipStatistics(permid, d['current time'], d['stats'])
return True
def gotBarterCastMessage(self, recv_msg, sender_permid, selversion):
if DEBUG:
print >> sys.stderr, 'bartercast: %s Received a BarterCast msg from %s' % (
ctime(now()), self.bartercastdb.getName(sender_permid))
if not sender_permid or sender_permid == self.bartercastdb.my_permid:
print >> sys.stderr, 'bartercast: error - got BarterCastMsg from a None peer', sender_permid, recv_msg
return False
if MAX_BARTERCAST_LENGTH > 0 and len(recv_msg) > MAX_BARTERCAST_LENGTH:
print >> sys.stderr, 'bartercast: warning - got large BarterCastMsg', len(
recv_msg)
return False
bartercast_data = {}
try:
bartercast_data = bdecode(recv_msg)
except:
print >> sys.stderr, 'bartercast: warning, invalid bencoded data'
return False
try:
self.validBarterCastMsg(bartercast_data)
except RuntimeError as msg:
print >> sys.stderr, msg
return False
if LOG:
self.logMsg(bartercast_data,
sender_permid,
'in',
logfile=self.logfile)
data = bartercast_data['data']
if 'totals' in bartercast_data:
totals = bartercast_data['totals']
else:
totals = None
if DEBUG:
st = time()
self.handleBarterCastMsg(sender_permid, data)
et = time()
diff = et - st
print >> sys.stderr, 'bartercast: HANDLE took %.4f' % diff
else:
self.handleBarterCastMsg(sender_permid, data, totals)
if not self.isBlocked(sender_permid, self.send_block_list):
self.replyBarterCast(sender_permid, selversion)
return True
def gotChannelCastMessage(self, recv_msg, sender_permid, selversion):
if selversion < OLPROTO_VER_THIRTEENTH:
if DEBUG:
print >> sys.stderr, 'channelcast: Do not receive from lower version peer:', selversion
return True
if DEBUG:
print >> sys.stderr, 'channelcast: Received a msg from ', show_permid_short(
sender_permid)
print >> sys.stderr, 'channelcast: my_permid=', show_permid_short(
self.my_permid)
if not sender_permid or sender_permid == self.my_permid:
if DEBUG:
print >> sys.stderr, 'channelcast: warning - got channelcastMsg from a None/Self peer', show_permid_short(
sender_permid), recv_msg
return False
channelcast_data = {}
try:
channelcast_data = bdecode(recv_msg)
except:
print >> sys.stderr, 'channelcast: warning, invalid bencoded data'
return False
if not validChannelCastMsg(channelcast_data):
print >> sys.stderr, 'channelcast: invalid channelcast_message'
return False
for ch in channelcast_data.values():
if isinstance(ch['publisher_name'], str):
ch['publisher_name'] = str2unicode(ch['publisher_name'])
if isinstance(ch['torrentname'], str):
ch['torrentname'] = str2unicode(ch['torrentname'])
self.handleChannelCastMsg(sender_permid, channelcast_data)
if self.log:
dns = self.dnsindb(sender_permid)
if dns:
ip, port = dns
MSG_ID = 'CHANNELCAST'
msg = repr(channelcast_data)
self.overlay_log('RECV_MSG', ip, port,
show_permid(sender_permid), selversion,
MSG_ID, msg)
if self.TESTASSERVER:
self.createAndSendChannelCastMessage(sender_permid, selversion)
return True
def read_and_send_metadata(self, permid, infohash, torrent_path, selversion):
torrent_data = self.read_torrent(torrent_path)
if torrent_data:
try:
metainfo = bdecode(torrent_data)
if 'info' in metainfo and 'private' in metainfo['info'] and metainfo['info']['private']:
if DEBUG:
print >> sys.stderr, 'metadata: Not sending torrent', `torrent_path`, 'because it is private'
return 0
except:
print_exc()
return 0
if DEBUG:
print >> sys.stderr, 'metadata: sending torrent', `torrent_path`, len(torrent_data)
torrent = {}
torrent['torrent_hash'] = infohash
tdef = TorrentDef.load_from_dict(metainfo)
if selversion >= OLPROTO_VER_ELEVENTH and tdef.get_url_compat():
torrent['metatype'] = URL_MIME_TYPE
torrent['metadata'] = tdef.get_url()
else:
torrent['metatype'] = TSTREAM_MIME_TYPE
torrent['metadata'] = torrent_data
if selversion >= OLPROTO_VER_FOURTH:
data = self.torrent_db.getTorrent(infohash)
if data is None:
return 0
nleechers = data.get('leecher', -1)
nseeders = data.get('seeder', -1)
last_check_ago = int(time()) - data.get('last_check_time', 0)
if last_check_ago < 0:
last_check_ago = 0
status = data.get('status', 'unknown')
torrent.update({'leecher': nleechers,
'seeder': nseeders,
'last_check_time': last_check_ago,
'status': status})
return self.do_send_metadata(permid, torrent, selversion)
else:
self.torrent_db.deleteTorrent(infohash, delete_file=True, commit=True)
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: no torrent data to send'
return 0
def gotUdpConnectReply(self, permid, selversion, channel_id, channel_data, error, mhr_msg, request_callback):
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotMakeHoleReplyMessage'
try:
mhr_data = bdecode(mhr_msg)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: bad encoded data:', mhr_msg
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: message is', mhr_data
try:
request_id, reply = mhr_data.split(':')
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in received data:', mhr_data
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: request_id is', request_id
if request_id in self.trav:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: request_id is in the list'
peer, value = self.trav[request_id]
if peer == None:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: first peer reply'
self.trav[request_id] = ((permid, self._secure_overlay.get_dns_from_peerdb(permid)), reply)
elif type(peer) == TupleType:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: second peer reply'
self._file2.write('; '.join((strftime('%Y/%m/%d %H:%M:%S'),
' REPLY',
request_id,
show_permid(peer[0]),
str(peer[1]),
value,
show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
reply,
'\n')))
del self.trav[request_id]
self._file2.flush()
def gotUdpConnectReply(self, permid, selversion, channel_id, channel_data,
error, mhr_msg, request_callback):
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: gotMakeHoleReplyMessage'
try:
mhr_data = bdecode(mhr_msg)
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: bad encoded data:', mhr_msg
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: message is', mhr_data
try:
request_id, reply = mhr_data.split(':')
except:
print_exc()
print >> sys.stderr, 'NatCheckMsgHandler: error in received data:', mhr_data
return False
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: request_id is', request_id
if request_id in self.trav:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: request_id is in the list'
peer, value = self.trav[request_id]
if peer == None:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: first peer reply'
self.trav[request_id] = ((
permid, self._secure_overlay.get_dns_from_peerdb(permid)),
reply)
elif type(peer) == TupleType:
if DEBUG:
print >> sys.stderr, 'NatCheckMsgHandler: second peer reply'
self._file2.write('; '.join(
(strftime('%Y/%m/%d %H:%M:%S'), ' REPLY', request_id,
show_permid(peer[0]), str(peer[1]), value,
show_permid(permid),
str(self._secure_overlay.get_dns_from_peerdb(permid)),
reply, '\n')))
del self.trav[request_id]
self._file2.flush()
def send_metadata(self, permid, message, selversion):
try:
infohash = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: error becoding'
return False
if not isValidInfohash(infohash):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: invalid hash'
return False
res = self.torrent_db.getOne(('torrent_file_name', 'status_id'),
infohash=bin2str(infohash))
if not res:
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: not in database', infohash
return True
torrent_file_name, status_id = res
if status_id == self.torrent_db._getStatusID('dead'):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: Torrent was dead'
return True
if not torrent_file_name:
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: no torrent file name'
return True
torrent_path = os.path.join(self.torrent_dir, torrent_file_name)
if not os.path.isfile(torrent_path):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: not existing', res, torrent_path
return True
task = {
'permid': permid,
'infohash': infohash,
'torrent_path': torrent_path,
'selversion': selversion
}
self.upload_queue.append(task)
if int(time()) >= self.next_upload_time:
self.checking_upload_queue()
return True
def send_metadata(self, permid, message, selversion):
try:
infohash = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: error becoding'
return False
if not isValidInfohash(infohash):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: invalid hash'
return False
res = self.torrent_db.getOne(('torrent_file_name', 'status_id'), infohash=bin2str(infohash))
if not res:
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: not in database', infohash
return True
torrent_file_name, status_id = res
if status_id == self.torrent_db._getStatusID('dead'):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: Torrent was dead'
return True
if not torrent_file_name:
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: no torrent file name'
return True
torrent_path = os.path.join(self.torrent_dir, torrent_file_name)
if not os.path.isfile(torrent_path):
if DEBUG:
print >> sys.stderr, 'metadata: GET_METADATA: not existing', res, torrent_path
return True
task = {'permid': permid,
'infohash': infohash,
'torrent_path': torrent_path,
'selversion': selversion}
self.upload_queue.append(task)
if int(time()) >= self.next_upload_time:
self.checking_upload_queue()
return True
def gotBarterCastMessage(self, recv_msg, sender_permid, selversion):
if DEBUG:
print >> sys.stderr, 'bartercast: %s Received a BarterCast msg from %s' % (ctime(now()), self.bartercastdb.getName(sender_permid))
if not sender_permid or sender_permid == self.bartercastdb.my_permid:
print >> sys.stderr, 'bartercast: error - got BarterCastMsg from a None peer', sender_permid, recv_msg
return False
if MAX_BARTERCAST_LENGTH > 0 and len(recv_msg) > MAX_BARTERCAST_LENGTH:
print >> sys.stderr, 'bartercast: warning - got large BarterCastMsg', len(recv_msg)
return False
bartercast_data = {}
try:
bartercast_data = bdecode(recv_msg)
except:
print >> sys.stderr, 'bartercast: warning, invalid bencoded data'
return False
try:
self.validBarterCastMsg(bartercast_data)
except RuntimeError as msg:
print >> sys.stderr, msg
return False
if LOG:
self.logMsg(bartercast_data, sender_permid, 'in', logfile=self.logfile)
data = bartercast_data['data']
if 'totals' in bartercast_data:
totals = bartercast_data['totals']
else:
totals = None
if DEBUG:
st = time()
self.handleBarterCastMsg(sender_permid, data)
et = time()
diff = et - st
print >> sys.stderr, 'bartercast: HANDLE took %.4f' % diff
else:
self.handleBarterCastMsg(sender_permid, data, totals)
if not self.isBlocked(sender_permid, self.send_block_list):
self.replyBarterCast(sender_permid, selversion)
return True
def isValidRemoteVal(d, selversion):
if not isinstance(d, dict):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: a: value not dict'
return False
if selversion >= OLPROTO_VER_TWELFTH:
if not ('content_name' in d and 'length' in d and 'leecher' in d and 'seeder' in d and 'category' in d and 'torrent_size' in d and 'channel_permid' in d and 'channel_name' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec12: key missing, got', d.keys()
return False
if 'metatype' in d and 'metadata' in d:
try:
metatype = d['metatype']
metadata = d['metadata']
if metatype == URL_MIME_TYPE:
tdef = TorrentDef.load_from_url(metadata)
else:
metainfo = bdecode(metadata)
tdef = TorrentDef.load_from_dict(metainfo)
except:
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec12: metadata invalid'
print_exc()
return False
elif selversion >= OLPROTO_VER_ELEVENTH:
if not ('content_name' in d and 'length' in d and 'leecher' in d and 'seeder' in d and 'category' in d and 'torrent_size' in d and 'channel_permid' in d and 'channel_name' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec11: key missing, got', d.keys()
return False
elif selversion >= OLPROTO_VER_NINETH:
if not ('content_name' in d and 'length' in d and 'leecher' in d and 'seeder' in d and 'category' in d and 'torrent_size' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec9: key missing, got', d.keys()
return False
elif not ('content_name' in d and 'length' in d and 'leecher' in d and 'seeder' in d and 'category' in d):
if DEBUG:
print >> sys.stderr, 'rqmh: reply: torrentrec6: key missing, got', d.keys()
return False
return True
def gotChannelCastMessage(self, recv_msg, sender_permid, selversion):
if selversion < OLPROTO_VER_THIRTEENTH:
if DEBUG:
print >> sys.stderr, 'channelcast: Do not receive from lower version peer:', selversion
return True
if DEBUG:
print >> sys.stderr, 'channelcast: Received a msg from ', show_permid_short(sender_permid)
print >> sys.stderr, 'channelcast: my_permid=', show_permid_short(self.my_permid)
if not sender_permid or sender_permid == self.my_permid:
if DEBUG:
print >> sys.stderr, 'channelcast: warning - got channelcastMsg from a None/Self peer', show_permid_short(sender_permid), recv_msg
return False
channelcast_data = {}
try:
channelcast_data = bdecode(recv_msg)
except:
print >> sys.stderr, 'channelcast: warning, invalid bencoded data'
return False
if not validChannelCastMsg(channelcast_data):
print >> sys.stderr, 'channelcast: invalid channelcast_message'
return False
for ch in channelcast_data.values():
if isinstance(ch['publisher_name'], str):
ch['publisher_name'] = str2unicode(ch['publisher_name'])
if isinstance(ch['torrentname'], str):
ch['torrentname'] = str2unicode(ch['torrentname'])
self.handleChannelCastMsg(sender_permid, channelcast_data)
if self.log:
dns = self.dnsindb(sender_permid)
if dns:
ip, port = dns
MSG_ID = 'CHANNELCAST'
msg = repr(channelcast_data)
self.overlay_log('RECV_MSG', ip, port, show_permid(sender_permid), selversion, MSG_ID, msg)
if self.TESTASSERVER:
self.createAndSendChannelCastMessage(sender_permid, selversion)
return True
def olthread_process_dialback_reply(self, dns, message):
self.dbreach = True
permid = self.olthread_permid_of_asked_peer(dns)
if permid is None:
if DEBUG:
print >> sys.stderr, "dialback: DIALBACK_REPLY: Got reply from peer I didn't ask", dns
return False
del self.peers_asked[permid]
try:
myip = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: error becoding'
return False
if not isValidIP(myip):
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: invalid IP'
return False
if self.trust_superpeers:
superpeers = self.superpeer_db.getSuperPeers()
if permid in superpeers:
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: superpeer said my IP address is', myip, 'setting it to that'
self.consensusip = myip
self.fromsuperpeer = True
else:
self.myips, consensusip = tally_opinion(myip, self.myips,
PEERS_TO_AGREE)
if self.consensusip is None:
self.consensusip = consensusip
if self.consensusip is not None:
self.launchmany.dialback_got_ext_ip_callback(self.consensusip)
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: I think my IP address is', self.old_ext_ip, 'others say', self.consensusip, ', setting it to latter'
self.launchmany.dialback_reachable_callback()
return True
def olthread_process_dialback_reply(self, dns, message):
self.dbreach = True
permid = self.olthread_permid_of_asked_peer(dns)
if permid is None:
if DEBUG:
print >> sys.stderr, "dialback: DIALBACK_REPLY: Got reply from peer I didn't ask", dns
return False
del self.peers_asked[permid]
try:
myip = bdecode(message[1:])
except:
print_exc()
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: error becoding'
return False
if not isValidIP(myip):
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: invalid IP'
return False
if self.trust_superpeers:
superpeers = self.superpeer_db.getSuperPeers()
if permid in superpeers:
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: superpeer said my IP address is', myip, 'setting it to that'
self.consensusip = myip
self.fromsuperpeer = True
else:
self.myips, consensusip = tally_opinion(myip, self.myips, PEERS_TO_AGREE)
if self.consensusip is None:
self.consensusip = consensusip
if self.consensusip is not None:
self.launchmany.dialback_got_ext_ip_callback(self.consensusip)
if DEBUG:
print >> sys.stderr, 'dialback: DIALBACK_REPLY: I think my IP address is', self.old_ext_ip, 'others say', self.consensusip, ', setting it to latter'
self.launchmany.dialback_reachable_callback()
return True
def StringToValue(self, value, type):
if value is not None:
if not isinstance(value, unicode) and not isinstance(value, str):
return value
try:
if type == 'boolean':
if value == '1':
value = True
else:
value = False
elif type == 'int':
value = int(value)
elif type == 'float':
value = float(value)
elif type == 'color':
value = None
elif type.startswith('bencode'):
value = bdecode(value)
except:
value = None
if value is None:
value = self.defaultvalues[type]
return value