code.delx.au - pymsnt/blob - src/ft.py

   1 # Copyright 2005 James Bunton <james@delx.cjb.net>
   2 # Licensed for distribution under the GPL version 2, check COPYING for details
   3
   4 from tlib.xmlw import Element
   5 from twisted.internet import protocol
   6
   7 import disco
   8 import lang
   9 from debug import LogEvent, INFO, WARN, ERROR
  10 import config
  11 import utils
  12
  13 import random
  14 import sys
  15
  16
  17 def checkSizeOk(size):
  18         if not config.ftSizeLimit:
  19                 return True # No limit
  20         try:
  21                 size = int(size)
  22                 limit = int(config.ftSizeLimit)
  23         except ValueError:
  24                 return False
  25         return limit > size
  26
  27 ###########
  28 # Sending #
  29 ###########
  30
  31 class FTSend:
  32         """ For file transfers going from Jabber to MSN. """
  33         def __init__(self, session, to, startTransfer, cancelTransfer, filename, filesize):
  34                 self.startTransfer = startTransfer
  35                 self.cancelTransfer = cancelTransfer
  36                 self.filename = filename
  37                 self.filesize = filesize
  38                 if not checkSizeOk(self.filesize):
  39                         LogEvent(INFO, session.jabberID, "File too large.")
  40                         session.legacycon.sendMessage(to, "", lang.get(session.lang).msnFtSizeRejected % (self.filename, config.ftSizeLimit, config.website), True)
  41                         self.reject()
  42                         return
  43
  44                 session.legacycon.sendFile(to, self)
  45
  46         def accept(self, legacyFileSend):
  47                 self.startTransfer(legacyFileSend)
  48
  49         def reject(self):
  50                 del self.startTransfer
  51                 self.cancelTransfer()
  52
  53
  54 try:
  55         from twisted.web import http
  56 except ImportError:
  57         try:
  58                 from twisted.protocols import http
  59         except ImportError:
  60                 print "Couldn't find http.HTTPClient. If you're using Twisted 2.0, make sure that you've installed twisted.web"
  61                 raise
  62
  63
  64 class OOBHeaderHelper(http.HTTPClient):
  65         """ Makes a HEAD request and grabs the length """
  66         def connectionMade(self):
  67                 self.sendCommand("HEAD", self.factory.path.encode("utf-8"))
  68                 self.sendHeader("Host", (self.factory.host + ":" + str(self.factory.port)).encode("utf-8"))
  69                 self.endHeaders()
  70
  71         def handleEndHeaders(self):
  72                 self.factory.gotLength(self.length)
  73
  74         def handleResponse(self, data):
  75                 pass
  76
  77
  78 class OOBSendConnector(http.HTTPClient):
  79         def connectionMade(self):
  80                 self.sendCommand("GET", self.factory.path.encode("utf-8"))
  81                 self.sendHeader("Host", (self.factory.host + ":" + str(self.factory.port)).encode("utf-8"))
  82                 self.endHeaders()
  83                 self.first = True
  84
  85         def handleResponsePart(self, data):
  86                 self.factory.consumer.write(data)
  87
  88         def handleResponseEnd(self):
  89                 # This is called once before writing is finished, and once when the
  90                 # connection closes. We only consumer.close() on the second.
  91                 if self.first:
  92                         self.first = False
  93                 else:
  94                         self.factory.consumer.close()
  95                         self.factory.consumer = None
  96                         self.factory.finished()
  97
  98
  99
 100
 101
 102 #############
 103 # Receiving #
 104 #############
 105
 106 class FTReceive:
 107         """ For file transfers going from MSN to Jabber. """
 108
 109         """
 110         Plan of action for this class:
 111         * Determine the FT support of the Jabber client.
 112         * If we find a common protocol, then send the invitation.
 113         * Tell the legacyftp object the result of the invitation.
 114         * If it was accepted, then start the transfer.
 115
 116         """
 117
 118         def __init__(self, session, senderJID, legacyftp):
 119                 if not checkSizeOk(legacyftp.filesize):
 120                         LogEvent(INFO, session.jabberID, "File too large.")
 121                         legacyftp.reject()
 122                         session.legacycon.sendMessage(senderJID, "", lang.get(session.lang).msnFtSizeRejected % (legacyftp.filename, config.ftSizeLimit, config.website), False)
 123                         return
 124                 self.session = session
 125                 self.toJID = self.session.jabberID + "/" + self.session.highestResource()
 126                 self.senderJID = senderJID
 127                 self.ident = (self.toJID, self.senderJID)
 128                 self.legacyftp = legacyftp
 129                 LogEvent(INFO, session.jabberID)
 130                 self.checkSupport()
 131
 132         def checkSupport(self):
 133                 def discoDone(features):
 134                         LogEvent(INFO, self.ident)
 135                         enabledS5B = hasattr(self.session.pytrans, "ftSOCKS5Receive")
 136                         enabledOOB = hasattr(self.session.pytrans, "ftOOBReceive")
 137                         hasFT  = features.count(disco.FT)
 138                         hasS5B = features.count(disco.S5B)
 139                         hasOOB = features.count(disco.IQOOB)
 140                         LogEvent(INFO, self.ident, "Choosing transfer mode.")
 141                         if hasFT > 0 and hasS5B > 0 and enabledS5B:
 142                                 self.socksMode()
 143                         elif hasOOB > 0 and enabledOOB:
 144                                 self.oobMode()
 145                         elif enabledOOB:
 146                                 self.messageOobMode()
 147                         else:
 148                                 # No support
 149                                 self.legacyftp.reject()
 150                                 del self.legacyftp
 151
 152                 def discoFail(err=None):
 153                         LogEvent(INFO, self.ident, str(err))
 154                         self.messageOobMode()
 155
 156                 d = disco.DiscoRequest(self.session.pytrans, self.toJID).doDisco()
 157                 d.addCallbacks(discoDone, discoFail)
 158
 159         def socksMode(self):
 160                 def ftReply(el):
 161                         if el.getAttribute("type") != "result":
 162                                 ftDeclined()
 163                                 return
 164                         self.session.pytrans.ftSOCKS5Receive.addConnection(utils.socks5Hash(self.sid, self.senderJID, self.toJID), self.legacyftp)
 165                         LogEvent(INFO, self.ident)
 166                         iq = Element((None, "iq"))
 167                         iq.attributes["type"] = "set"
 168                         iq.attributes["to"] = self.toJID
 169                         iq.attributes["from"] = self.senderJID
 170                         query = iq.addElement("query")
 171                         query.attributes["xmlns"] = disco.S5B
 172                         query.attributes["sid"] = self.sid
 173                         query.attributes["mode"] = "tcp"
 174                         streamhost = query.addElement("streamhost")
 175                         streamhost.attributes["jid"] = self.senderJID
 176                         streamhost.attributes["host"] = config.host
 177                         streamhost.attributes["port"] = config.ftJabberPort
 178                         d = self.session.pytrans.discovery.sendIq(iq)
 179                         d.addErrback(ftDeclined) # Timeout
 180
 181                 def ftDeclined(el):
 182                         self.legacyftp.reject()
 183                         del self.legacyftp
 184
 185                 LogEvent(INFO, self.ident)
 186                 self.sid = str(random.randint(1000, sys.maxint))
 187                 iq = Element((None, "iq"))
 188                 iq.attributes["type"] = "set"
 189                 iq.attributes["to"] = self.toJID
 190                 iq.attributes["from"] = self.senderJID
 191                 si = iq.addElement("si")
 192                 si.attributes["xmlns"] = disco.SI
 193                 si.attributes["profile"] = disco.FT
 194                 si.attributes["id"] = self.sid
 195                 file = si.addElement("file")
 196                 file.attributes["xmlns"] = disco.FT
 197                 file.attributes["size"] = str(self.legacyftp.filesize)
 198                 file.attributes["name"] = self.legacyftp.filename
 199                 # Feature negotiation
 200                 feature = si.addElement("feature")
 201                 feature.attributes["xmlns"] = disco.FEATURE_NEG
 202                 x = feature.addElement("x")
 203                 x.attributes["xmlns"] = disco.XDATA
 204                 x.attributes["type"] = "form"
 205                 field = x.addElement("field")
 206                 field.attributes["type"] = "list-single"
 207                 field.attributes["var"] = "stream-method"
 208                 option = field.addElement("option")
 209                 value = option.addElement("value")
 210                 value.addContent(disco.S5B)
 211                 d = self.session.pytrans.discovery.sendIq(iq, 60*3)
 212                 d.addCallback(ftReply)
 213                 d.addErrback(ftDeclined)
 214
 215         def oobMode(self):
 216                 def cb(el):
 217                         if el.getAttribute("type") != "result":
 218                                 self.legacyftp.reject()
 219                         del self.legacyftp
 220                         self.session.pytrans.ftOOBReceive.remFile(filename)
 221
 222                 def ecb(ignored=None):
 223                         self.legacyftp.reject()
 224                         del self.legacyftp
 225
 226                 LogEvent(INFO, self.ident)
 227                 filename = self.session.pytrans.ftOOBReceive.putFile(self, self.legacyftp.filename)
 228                 iq = Element((None, "iq"))
 229                 iq.attributes["to"] = self.toJID
 230                 iq.attributes["from"] = self.senderJID
 231                 query = m.addElement("query")
 232                 query.attributes["xmlns"] = disco.IQOOB
 233                 query.addElement("url").addContent(config.ftOOBRoot + "/" + filename)
 234                 d = self.session.send(iq)
 235                 d.addCallbacks(cb, ecb)
 236
 237         def messageOobMode(self):
 238                 LogEvent(INFO, self.ident)
 239                 filename = self.session.pytrans.ftOOBReceive.putFile(self, self.legacyftp.filename)
 240                 m = Element((None, "message"))
 241                 m.attributes["to"] = self.session.jabberID
 242                 m.attributes["from"] = self.senderJID
 243                 m.addElement("body").addContent(config.ftOOBRoot + "/" + filename)
 244                 x = m.addElement("x")
 245                 x.attributes["xmlns"] = disco.XOOB
 246                 x.addElement("url").addContent(config.ftOOBRoot + "/" + filename)
 247                 self.session.pytrans.send(m)
 248
 249         def error(self, ignored=None):
 250                 # FIXME
 251                 LogEvent(WARN)
 252
 253
 254
 255 # SOCKS5
 256
 257 from tlib import socks5
 258 import struct
 259
 260 class JEP65ConnectionSend(protocol.Protocol):
 261 # TODO, clean up and move this to tlib.socks5
 262         STATE_INITIAL = 1
 263         STATE_WAIT_AUTHOK = 2
 264         STATE_WAIT_CONNECTOK = 3
 265         STATE_READY = 4
 266
 267         def __init__(self):
 268                 self.state = self.STATE_INITIAL
 269                 self.buf = ""
 270
 271         def connectionMade(self):
 272                 self.transport.write(struct.pack("!BBB", 5, 1, 0))
 273                 self.state = self.STATE_WAIT_AUTHOK
 274
 275         def connectionLost(self, reason):
 276                 if self.state == self.STATE_READY:
 277                         self.factory.consumer.close()
 278
 279         def _waitAuthOk(self):
 280                 ver, method = struct.unpack("!BB", self.buf[:2])
 281                 if ver != 5 or method != 0:
 282                         self.transport.loseConnection()
 283                         return
 284                 self.buf = self.buf[2:] # chop
 285
 286                 # Send CONNECT request
 287                 length = len(self.factory.hash)
 288                 self.transport.write(struct.pack("!BBBBB", 5, 1, 0, 3, length))
 289                 self.transport.write("".join([struct.pack("!B" , ord(x))[0] for x in self.factory.hash]))
 290                 self.transport.write(struct.pack("!H", 0))
 291                 self.state = self.STATE_WAIT_CONNECTOK
 292
 293         def _waitConnectOk(self):
 294                 ver, rep, rsv, atyp = struct.unpack("!BBBB", self.buf[:4])
 295                 if not (ver == 5 and rep == 0):
 296                         self.transport.loseConnection()
 297                         return
 298
 299                 self.state = self.STATE_READY
 300                 self.factory.madeConnection(self.transport.addr[0])
 301
 302         def dataReceived(self, buf):
 303                 if self.state == self.STATE_READY:
 304                         self.factory.consumer.write(buf)
 305
 306                 self.buf += buf
 307                 if self.state == self.STATE_WAIT_AUTHOK:
 308                         self._waitAuthOk()
 309                 elif self.state == self.STATE_WAIT_CONNECTOK:
 310                         self._waitConnectOk()
 311
 312
 313 class JEP65ConnectionReceive(socks5.SOCKSv5):
 314         def __init__(self, listener):
 315                 socks5.SOCKSv5.__init__(self)
 316                 self.listener = listener
 317                 self.supportedAuthMechs = [socks5.AUTHMECH_ANON]
 318                 self.supportedAddrs = [socks5.ADDR_DOMAINNAME]
 319                 self.enabledCommands = [socks5.CMD_CONNECT]
 320                 self.addr = ""
 321
 322         def connectRequested(self, addr, port):
 323                 # So that the legacyftp can close the connection
 324                 self.transport.close = self.transport.loseConnection
 325
 326                 # Check for special connect to the namespace -- this signifies that
 327                 # the client is just checking that it can connect to the streamhost
 328                 if addr == disco.S5B:
 329                         self.connectCompleted(addr, 0)
 330                         self.transport.loseConnection()
 331                         return
 332
 333                 self.addr = addr
 334
 335                 if self.listener.isActive(addr):
 336                         self.sendErrorReply(socks5.REPLY_CONN_NOT_ALLOWED)
 337                         return
 338
 339                 if self.listener.addConnection(addr, self):
 340                         self.connectCompleted(addr, 0)
 341                 else:
 342                         self.sendErrorReply(socks5.REPLY_CONN_REFUSED)
 343
 344         def connectionLost(self, reason):
 345                 if self.state == socks5.STATE_CONNECT_PENDING:
 346                         self.listener.removePendingConnection(self.addr, self)
 347                 else:
 348                         self.transport.unregisterProducer()
 349                         if self.peersock != None:
 350                                 self.peersock.peersock = None
 351                                 self.peersock.transport.unregisterProducer()
 352                                 self.peersock = None
 353                                 self.listener.removeActiveConnection(self.addr)
 354
 355 class Proxy65(protocol.Factory):
 356         def __init__(self, port):
 357                 LogEvent(INFO)
 358                 reactor.listenTCP(port, self)
 359                 self.pendingConns = {}
 360                 self.activeConns = {}
 361
 362         def buildProtocol(self, addr):
 363                 return JEP65ConnectionReceive(self)
 364
 365         def isActive(self, address):
 366                 return address in self.activeConns
 367
 368         def activateStream(self, address):
 369                 if address in self.pendingConns:
 370                         olist = self.pendingConns[address]
 371                         if len(olist) != 2:
 372                                 LogEvent(WARN, '', "Not exactly two!")
 373                                 return
 374
 375                         assert address not in self.activeConns
 376                         self.activeConns[address] = None
 377
 378                         if not isinstance(olist[0], (JEP65ConnectionReceive, JEP65ConnectionSend)):
 379                                 legacyftp = olist[0]
 380                                 connection = olist[1]
 381                         elif not isinstance(olist[1], (JEP65ConnectionReceive, JEP65ConnectionSend)):
 382                                 legacyftp = olist[1]
 383                                 connection = olist[0]
 384                         else:
 385                                 LogEvent(WARN, '', "No JEP65Connection")
 386                                 return
 387
 388                         legacyftp.accept(connection.transport)
 389                 else:
 390                         LogEvent(WARN, '', "No pending connection.")
 391
 392         def addConnection(self, address, connection):
 393                 olist = self.pendingConns.get(address, [])
 394                 if len(olist) <= 1:
 395                         olist.append(connection)
 396                         self.pendingConns[address] = olist
 397                         if len(olist) == 2:
 398                                 self.activateStream(address)
 399                         return True
 400                 else:
 401                         return False
 402
 403         def removePendingConnection(self, address, connection):
 404                 olist = self.pendingConns[address]
 405                 if len(olist) == 1:
 406                         del self.pendingConns[address]
 407                 else:
 408                         olist.remove(connection)
 409
 410         def removeActiveConnection(self, address):
 411                 del self.activeConns[address]
 412
 413
 414 # OOB download server
 415
 416 from twisted.web import server, resource, error
 417 from twisted.internet import reactor
 418
 419 from debug import LogEvent, INFO, WARN, ERROR
 420
 421 class OOBReceiveConnector:
 422         def __init__(self, ftReceive, ftHttpPush):
 423                 self.ftReceive, self.ftHttpPush = ftReceive, ftHttpPush
 424                 self.ftReceive.legacyftp.accept(self)
 425
 426         def write(self, data):
 427                 self.ftHttpPush.write(data)
 428
 429         def close(self):
 430                 self.ftHttpPush.finish()
 431
 432         def error(self):
 433                 self.ftHttpPush.finish()
 434                 self.ftReceive.error()
 435
 436 class FileTransferOOBReceive(resource.Resource):
 437         def __init__(self, port):
 438                 LogEvent(INFO)
 439                 self.isLeaf = True
 440                 self.files = {}
 441                 self.oobSite = server.Site(self)
 442                 reactor.listenTCP(port, self.oobSite)
 443
 444         def putFile(self, file, filename):
 445                 path = str(random.randint(100000000, 999999999))
 446                 filename = (path + "/" + filename).replace("//", "/")
 447                 self.files[filename] = file
 448                 return filename
 449
 450         def remFile(self, filename):
 451                 if self.files.has_key(filename):
 452                         del self.files[filename]
 453
 454         def render_GET(self, request):
 455                 filename = request.path[1:] # Remove the leading /
 456                 if self.files.has_key(filename):
 457                         file = self.files[filename]
 458                         request.setHeader("Content-Length", str(file.legacyftp.filesize))
 459                         request.setHeader("Content-Disposition", "attachment; filename=\"%s\"" % file.legacyftp.filename.encode("utf-8"))
 460                         OOBReceiveConnector(file, request)
 461                         del self.files[filename]
 462                         return server.NOT_DONE_YET
 463                 else:
 464                         page = error.NoResource(message="404 File Not Found")
 465                         return page.render(request)
 466
 467         def render_HEAD(self, request):
 468                 filename = request.path[1:] # Remove the leading /
 469                 if self.files.has_key(filename):
 470                         file = self.files[filename]
 471                         request.setHeader("Content-Length", str(file.legacyftp.filesize))
 472                         request.setHeader("Content-Disposition", "attachment; filename=\"%s\"" % file.legacyftp.filename.encode("utf-8"))
 473                         return ""
 474                 else:
 475                         page = error.NoResource(message="404 File Not Found")
 476                         return page.render(request)
 477
 478