]> code.delx.au - pymsnt/blobdiff - src/legacy/msn/msn.py
Merged branches/msnfix 204:217 to trunk
[pymsnt] / src / legacy / msn / msn.py
diff --git a/src/legacy/msn/msn.py b/src/legacy/msn/msn.py
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+# Twisted, the Framework of Your Internet
+# Copyright (C) 2001-2002 Matthew W. Lefkowitz
+# Copyright (C) 2004-2005 James C. Bunton
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+MSNP11 Protocol (client only) - semi-experimental
+
+Stability: unstable.
+
+This module provides support for clients using the MSN Protocol (MSNP11).
+There are basically 3 servers involved in any MSN session:
+
+I{Dispatch server}
+
+The DispatchClient class handles connections to the
+dispatch server, which basically delegates users to a
+suitable notification server.
+
+You will want to subclass this and handle the gotNotificationReferral
+method appropriately.
+    
+I{Notification Server}
+
+The NotificationClient class handles connections to the
+notification server, which acts as a session server
+(state updates, message negotiation etc...)
+
+I{Switcboard Server}
+
+The SwitchboardClient handles connections to switchboard
+servers which are used to conduct conversations with other users.
+
+There are also two classes (FileSend and FileReceive) used
+for file transfers.
+
+Clients handle events in two ways.
+
+  - each client request requiring a response will return a Deferred,
+    the callback for same will be fired when the server sends the
+    required response
+  - Events which are not in response to any client request have
+    respective methods which should be overridden and handled in
+    an adequate manner
+
+Most client request callbacks require more than one argument,
+and since Deferreds can only pass the callback one result,
+most of the time the callback argument will be a tuple of
+values (documented in the respective request method).
+To make reading/writing code easier, callbacks can be defined in
+a number of ways to handle this 'cleanly'. One way would be to
+define methods like: def callBack(self, (arg1, arg2, arg)): ...
+another way would be to do something like:
+d.addCallback(lambda result: myCallback(*result)).
+
+If the server sends an error response to a client request,
+the errback of the corresponding Deferred will be called,
+the argument being the corresponding error code.
+
+B{NOTE}:
+Due to the lack of an official spec for MSNP11, extra checking
+than may be deemed necessary often takes place considering the
+server is never 'wrong'. Thus, if gotBadLine (in any of the 3
+main clients) is called, or an MSNProtocolError is raised, it's
+probably a good idea to submit a bug report. ;)
+Use of this module requires that PyOpenSSL is installed.
+
+@author: U{Sam Jordan<mailto:sam@twistedmatrix.com>}
+@author: U{James Bunton<mailto:james@delx.cjb.net>}
+"""
+
+from __future__ import nested_scopes
+
+# Sibling imports
+from twisted.protocols.basic import LineReceiver
+try:
+    from twisted.web.http import HTTPClient
+except ImportError:
+    try:
+        from twisted.protocols.http import HTTPClient
+    except ImportError:
+        print "Couldn't find a HTTPClient. If you're using Twisted 2.0 make sure you've installed twisted.web"
+        raise
+import msnp11chl
+
+# Twisted imports
+from twisted.internet import reactor, task
+from twisted.internet.defer import Deferred
+from twisted.internet.protocol import ReconnectingClientFactory, ClientFactory
+try:
+    from twisted.internet.ssl import ClientContextFactory
+except ImportError:
+    print "You must install pycrypto and pyopenssl."
+    raise
+from twisted.python import failure, log
+from twisted.words.xish.domish import parseText, unescapeFromXml
+
+
+# System imports
+import types, operator, os, sys, base64, random, struct, random, sha, base64, StringIO, array, codecs, binascii
+from urllib import quote, unquote
+
+
+MSN_PROTOCOL_VERSION = "MSNP11 CVR0"      # protocol version
+MSN_PORT             = 1863               # default dispatch server port
+MSN_MAX_MESSAGE      = 1664               # max message length
+MSN_CVR_STR          = "0x040c winnt 5.1 i386 MSNMSGR 7.0.0777 msmsgs"
+MSN_AVATAR_GUID      = "{A4268EEC-FEC5-49E5-95C3-F126696BDBF6}"
+MSN_MSNFTP_GUID      = "{5D3E02AB-6190-11D3-BBBB-00C04F795683}"
+
+# auth constants
+LOGIN_SUCCESS  = 1
+LOGIN_FAILURE  = 2
+LOGIN_REDIRECT = 3
+
+# list constants
+FORWARD_LIST = 1
+ALLOW_LIST   = 2
+BLOCK_LIST   = 4
+REVERSE_LIST = 8
+PENDING_LIST = 16
+
+# phone constants
+HOME_PHONE   = "PHH"
+WORK_PHONE   = "PHW"
+MOBILE_PHONE = "PHM"
+HAS_PAGER    = "MOB"
+HAS_BLOG     = "HSB"
+
+# status constants
+STATUS_ONLINE  = 'NLN'
+STATUS_OFFLINE = 'FLN'
+STATUS_HIDDEN  = 'HDN'
+STATUS_IDLE    = 'IDL'
+STATUS_AWAY    = 'AWY'
+STATUS_BUSY    = 'BSY'
+STATUS_BRB     = 'BRB'
+STATUS_PHONE   = 'PHN'
+STATUS_LUNCH   = 'LUN'
+
+PINGSPEED = 50.0
+
+LINEDEBUG = False
+MESSAGEDEBUG = False
+MSNP2PDEBUG = False
+
+
+P2PSEQ = [-3, -2, 0, -1, 1, 2, 3, 4, 5, 6, 7, 8]
+def p2pseq(n):
+    if n > 5:
+        return n - 3
+    else:
+        return P2PSEQ[n]
+
+
+def getVal(inp):
+    return inp.split('=')[1]
+
+def getVals(params):
+    userHandle = ""
+    screenName = ""
+    userGuid   = ""
+    lists      = -1
+    groups     = []
+    for p in params:
+        if not p:
+            continue
+        elif p[0] == 'N':
+            userHandle = getVal(p)
+        elif p[0] == 'F':
+            screenName = unquote(getVal(p))
+        elif p[0] == 'C':
+            userGuid = getVal(p)
+        elif p.isdigit():
+            lists = int(p)
+        else: # Must be the groups
+            try:
+                groups = p.split(',')
+            except:
+                raise MSNProtocolError, "Unknown LST/ADC response" + str(params) # debug
+
+    return userHandle, screenName, userGuid, lists, groups
+
+def ljust(s, n, c):
+    """ Needed for Python 2.3 compatibility """
+    return s + (n-len(s))*c
+
+if sys.byteorder == "little":
+    def utf16net(s):
+        """ Encodes to utf-16 and ensures network byte order. Strips the BOM """
+        a = array.array("h", s.encode("utf-16")[2:])
+        a.byteswap()
+        return a.tostring()
+else:
+    def utf16net(s):
+        """ Encodes to utf-16 and ensures network byte order. Strips the BOM """
+        return s.encode("utf-16")[2:]
+
+def b64enc(s):
+    return base64.encodestring(s).replace("\n", "")
+
+def b64dec(s):
+    for pad in ["", "=", "==", "A", "A=", "A=="]: # Stupid MSN client!
+        try:
+            return base64.decodestring(s + pad)
+        except:
+            pass
+    raise ValueError("Got some very bad base64!")
+
+def random_guid():
+    format = "{%4X%4X-%4X-%4X-%4X-%4X%4X%4X}"
+    data = []
+    for x in xrange(8):
+        data.append(random.random() * 0xAAFF + 0x1111)
+    data = tuple(data)
+
+    return format % data
+
+def checkParamLen(num, expected, cmd, error=None):
+    if error == None: error = "Invalid Number of Parameters for %s" % cmd
+    if num != expected: raise MSNProtocolError, error
+
+def _parseHeader(h, v):
+    """
+    Split a certin number of known
+    header values with the format:
+    field1=val,field2=val,field3=val into
+    a dict mapping fields to values.
+    @param h: the header's key
+    @param v: the header's value as a string
+    """
+
+    if h in ('passporturls','authentication-info','www-authenticate'):
+        v = v.replace('Passport1.4','').lstrip()
+        fields = {}
+        for fieldPair in v.split(','):
+            try:
+                field,value = fieldPair.split('=',1)
+                fields[field.lower()] = value
+            except ValueError:
+                fields[field.lower()] = ''
+        return fields
+    else: return v
+
+def _parsePrimitiveHost(host):
+    # Ho Ho Ho
+    h,p = host.replace('https://','').split('/',1)
+    p = '/' + p
+    return h,p
+
+def _login(userHandle, passwd, nexusServer, cached=0, authData=''):
+    """
+    This function is used internally and should not ever be called
+    directly.
+    """
+    cb = Deferred()
+    def _cb(server, auth):
+        loginFac = ClientFactory()
+        loginFac.protocol = lambda : PassportLogin(cb, userHandle, passwd, server, auth)
+        reactor.connectSSL(_parsePrimitiveHost(server)[0], 443, loginFac, ClientContextFactory())
+
+    if cached:
+        _cb(nexusServer, authData)
+    else:
+        fac = ClientFactory()
+        d = Deferred()
+        d.addCallbacks(_cb, callbackArgs=(authData,))
+        d.addErrback(lambda f: cb.errback(f))
+        fac.protocol = lambda : PassportNexus(d, nexusServer)
+        reactor.connectSSL(_parsePrimitiveHost(nexusServer)[0], 443, fac, ClientContextFactory())
+    return cb
+
+
+class PassportNexus(HTTPClient):
+    
+    """
+    Used to obtain the URL of a valid passport
+    login HTTPS server.
+
+    This class is used internally and should
+    not be instantiated directly -- that is,
+    The passport logging in process is handled
+    transparantly by NotificationClient.
+    """
+
+    def __init__(self, deferred, host):
+        self.deferred = deferred
+        self.host, self.path = _parsePrimitiveHost(host)
+
+    def connectionMade(self):
+        HTTPClient.connectionMade(self)
+        self.sendCommand('GET', self.path)
+        self.sendHeader('Host', self.host)
+        self.endHeaders()
+        self.headers = {}
+
+    def handleHeader(self, header, value):
+        h = header.lower()
+        self.headers[h] = _parseHeader(h, value)
+
+    def handleEndHeaders(self):
+        if self.connected: self.transport.loseConnection()
+        if not self.headers.has_key('passporturls') or not self.headers['passporturls'].has_key('dalogin'):
+            self.deferred.errback(failure.Failure(failure.DefaultException("Invalid Nexus Reply")))
+        else:
+            self.deferred.callback('https://' + self.headers['passporturls']['dalogin'])
+
+    def handleResponse(self, r): pass
+
+class PassportLogin(HTTPClient):
+    """
+    This class is used internally to obtain
+    a login ticket from a passport HTTPS
+    server -- it should not be used directly.
+    """
+
+    _finished = 0
+
+    def __init__(self, deferred, userHandle, passwd, host, authData):
+        self.deferred = deferred
+        self.userHandle = userHandle
+        self.passwd = passwd
+        self.authData = authData
+        self.host, self.path = _parsePrimitiveHost(host)
+
+    def connectionMade(self):
+        self.sendCommand('GET', self.path)
+        self.sendHeader('Authorization', 'Passport1.4 OrgVerb=GET,OrgURL=http://messenger.msn.com,' +
+                                         'sign-in=%s,pwd=%s,%s' % (quote(self.userHandle), quote(self.passwd), self.authData))
+        self.sendHeader('Host', self.host)
+        self.endHeaders()
+        self.headers = {}
+
+    def handleHeader(self, header, value):
+        h = header.lower()
+        self.headers[h] = _parseHeader(h, value)
+
+    def handleEndHeaders(self):
+        if self._finished: return
+        self._finished = 1 # I think we need this because of HTTPClient
+        if self.connected: self.transport.loseConnection()
+        authHeader = 'authentication-info'
+        _interHeader = 'www-authenticate'
+        if self.headers.has_key(_interHeader): authHeader = _interHeader
+        try:
+            info = self.headers[authHeader]
+            status = info['da-status']
+            handler = getattr(self, 'login_%s' % (status,), None)
+            if handler:
+                handler(info)
+            else: raise Exception()
+        except Exception, e:
+            self.deferred.errback(failure.Failure(e))
+
+    def handleResponse(self, r): pass
+
+    def login_success(self, info):
+        ticket = info['from-pp']
+        ticket = ticket[1:len(ticket)-1]
+        self.deferred.callback((LOGIN_SUCCESS, ticket))
+
+    def login_failed(self, info):
+        self.deferred.callback((LOGIN_FAILURE, unquote(info['cbtxt'])))
+
+    def login_redir(self, info):
+        self.deferred.callback((LOGIN_REDIRECT, self.headers['location'], self.authData))
+
+class MSNProtocolError(Exception):
+    """
+    This Exception is basically used for debugging
+    purposes, as the official MSN server should never
+    send anything _wrong_ and nobody in their right
+    mind would run their B{own} MSN server.
+    If it is raised by default command handlers
+    (handle_BLAH) the error will be logged.
+    """
+    pass
+
+class MSNMessage:
+
+    """
+    I am the class used to represent an 'instant' message.
+
+    @ivar userHandle: The user handle (passport) of the sender
+                      (this is only used when receiving a message)
+    @ivar screenName: The screen name of the sender (this is only used
+                      when receiving a message)
+    @ivar message: The message
+    @ivar headers: The message headers
+    @type headers: dict
+    @ivar length: The message length (including headers and line endings)
+    @ivar ack: This variable is used to tell the server how to respond
+               once the message has been sent. If set to MESSAGE_ACK
+               (default) the server will respond with an ACK upon receiving
+               the message, if set to MESSAGE_NACK the server will respond
+               with a NACK upon failure to receive the message.
+               If set to MESSAGE_ACK_NONE the server will do nothing.
+               This is relevant for the return value of
+               SwitchboardClient.sendMessage (which will return
+               a Deferred if ack is set to either MESSAGE_ACK or MESSAGE_NACK  
+               and will fire when the respective ACK or NACK is received).
+               If set to MESSAGE_ACK_NONE sendMessage will return None.
+    """
+    MESSAGE_ACK      = 'A'
+    MESSAGE_ACK_FAT  = 'D'
+    MESSAGE_NACK     = 'N'
+    MESSAGE_ACK_NONE = 'U'
+
+    ack = MESSAGE_ACK
+
+    def __init__(self, length=0, userHandle="", screenName="", message="", specialMessage=False):
+        self.userHandle = userHandle
+        self.screenName = screenName
+        self.specialMessage = specialMessage
+        self.message = message
+        self.headers = {'MIME-Version' : '1.0', 'Content-Type' : 'text/plain; charset=UTF-8'}
+        self.length = length
+        self.readPos = 0
+
+    def _calcMessageLen(self):
+        """
+        used to calculte the number to send
+        as the message length when sending a message.
+        """
+        return reduce(operator.add, [len(x[0]) + len(x[1]) + 4  for x in self.headers.items()]) + len(self.message) + 2
+
+    def delHeader(self, header):
+        """ delete the desired header """
+        if self.headers.has_key(header):
+            del self.headers[header]
+
+    def setHeader(self, header, value):
+        """ set the desired header """
+        self.headers[header] = value
+
+    def getHeader(self, header):
+        """
+        get the desired header value
+        @raise KeyError: if no such header exists.
+        """
+        return self.headers[header]
+
+    def hasHeader(self, header):
+        """ check to see if the desired header exists """
+        return self.headers.has_key(header)
+
+    def getMessage(self):
+        """ return the message - not including headers """
+        return self.message
+
+    def setMessage(self, message):
+        """ set the message text """
+        self.message = message
+
+
+class MSNObject:
+    """
+    Used to represent a MSNObject. This can be currently only be an avatar.
+
+    @ivar creator: The userHandle of the creator of this picture.
+    @ivar imageData: The PNG image data (only for our own avatar)
+    @ivar type: Always set to 3, for avatar.
+    @ivar size: The size of the image.
+    @ivar location: The filename of the image.
+    @ivar friendly: Unknown.
+    @ivar text: The textual representation of this MSNObject.
+    """
+    def __init__(self, s=""):
+        """ Pass a XML MSNObject string to parse it, or pass no arguments for a null MSNObject to be created. """
+        self.setNull()
+        if s:
+            self.parse(s)
+    
+    def setData(self, creator, imageData):
+        """ Set the creator and imageData for this object """
+        self.creator = creator
+        self.imageData = imageData
+        self.size = len(imageData)
+        self.type = 3
+        self.location = "TMP" + str(random.randint(1000,9999))
+        self.friendly = "AAA="
+        self.sha1d = b64enc(sha.sha(imageData).digest())
+        self.makeText()
+    
+    def setNull(self):
+        self.creator = ""
+        self.imageData = ""
+        self.size = 0
+        self.type = 0
+        self.location = ""
+        self.friendly = ""
+        self.sha1d = ""
+        self.text = ""
+    
+    def makeText(self):
+        """ Makes a textual representation of this MSNObject. Stores it in self.text """
+        h = []
+        h.append("Creator")
+        h.append(self.creator)
+        h.append("Size")
+        h.append(str(self.size))
+        h.append("Type")
+        h.append(str(self.type))
+        h.append("Location")
+        h.append(self.location)
+        h.append("Friendly")
+        h.append(self.friendly)
+        h.append("SHA1D")
+        h.append(self.sha1d)
+        sha1c = b64enc(sha.sha("".join(h)).digest())
+        self.text = '<msnobj Creator="%s" Size="%s" Type="%s" Location="%s" Friendly="%s" SHA1D="%s" SHA1C="%s"/>' % (self.creator, str(self.size), str(self.type), self.location, self.friendly, self.sha1d, sha1c)
+    
+    def parse(self, s):
+        e = parseText(s, True)
+        if not e:
+            return # Parse failed
+        self.creator = e.getAttribute("Creator")
+        self.size = int(e.getAttribute("Size"))
+        self.type = int(e.getAttribute("Type"))
+        self.location = e.getAttribute("Location")
+        self.friendly = e.getAttribute("Friendly")
+        self.sha1d = e.getAttribute("SHA1D")
+        self.text = s
+
+
+class MSNContact:
+    
+    """
+    This class represents a contact (user).
+
+    @ivar userGuid: The contact's user guid (unique string)
+    @ivar userHandle: The contact's user handle (passport).
+    @ivar screenName: The contact's screen name.
+    @ivar groups: A list of all the group IDs which this
+                  contact belongs to.
+    @ivar lists: An integer representing the sum of all lists
+                 that this contact belongs to.
+    @ivar caps: int, The capabilities of this client
+    @ivar msnobj: The MSNObject representing the contact's avatar
+    @ivar status: The contact's status code.
+    @type status: str if contact's status is known, None otherwise.
+    @ivar personal: The contact's personal message .
+    @type personal: str if contact's personal message is known, None otherwise.
+
+    @ivar homePhone: The contact's home phone number.
+    @type homePhone: str if known, otherwise None.
+    @ivar workPhone: The contact's work phone number.
+    @type workPhone: str if known, otherwise None.
+    @ivar mobilePhone: The contact's mobile phone number.
+    @type mobilePhone: str if known, otherwise None.
+    @ivar hasPager: Whether or not this user has a mobile pager
+    @ivar hasBlog: Whether or not this user has a MSN Spaces blog
+                    (true=yes, false=no)
+    """
+    MSNC1 = 0x10000000
+    MSNC2 = 0x20000000
+    MSNC3 = 0x30000000
+    MSNC4 = 0x40000000
+    
+    def __init__(self, userGuid="", userHandle="", screenName="", lists=0, caps=0, msnobj=None, groups={}, status=None, personal=""):
+        self.userGuid = userGuid
+        self.userHandle = userHandle
+        self.screenName = screenName
+        self.lists = lists
+        self.caps = caps
+        self.msnobj = msnobj
+        self.msnobjGot = True
+        self.groups = [] # if applicable
+        self.status = status # current status
+        self.personal = personal
+
+        # phone details
+        self.homePhone   = None
+        self.workPhone   = None
+        self.mobilePhone = None
+        self.hasPager    = None
+        self.hasBlog     = None
+
+    def setPhone(self, phoneType, value):
+        """
+        set phone numbers/values for this specific user.
+        for phoneType check the *_PHONE constants and HAS_PAGER
+        """
+
+        t = phoneType.upper()
+        if t == HOME_PHONE: self.homePhone = value
+        elif t == WORK_PHONE: self.workPhone = value
+        elif t == MOBILE_PHONE: self.mobilePhone = value
+        elif t == HAS_PAGER: self.hasPager = value
+        elif t == HAS_BLOG: self.hasBlog = value
+        #else: raise ValueError, "Invalid Phone Type: " + t
+
+    def addToList(self, listType):
+        """
+        Update the lists attribute to
+        reflect being part of the
+        given list.
+        """
+        self.lists |= listType
+
+    def removeFromList(self, listType):
+        """
+        Update the lists attribute to
+        reflect being removed from the
+        given list.
+        """
+        self.lists ^= listType
+
+class MSNContactList:
+    """
+    This class represents a basic MSN contact list.
+
+    @ivar contacts: All contacts on my various lists
+    @type contacts: dict (mapping user handles to MSNContact objects)
+    @ivar groups: a mapping of group ids to group names
+                  (groups can only exist on the forward list)
+    @type groups: dict
+
+    B{Note}:
+    This is used only for storage and doesn't effect the
+    server's contact list.
+    """
+
+    def __init__(self):
+        self.contacts = {}
+        self.groups = {}
+        self.autoAdd = 0
+        self.privacy = 0
+        self.version = 0
+
+    def _getContactsFromList(self, listType):
+        """
+        Obtain all contacts which belong
+        to the given list type.
+        """
+        return dict([(uH,obj) for uH,obj in self.contacts.items() if obj.lists & listType])
+
+    def addContact(self, contact):
+        """
+        Add a contact
+        """
+        self.contacts[contact.userHandle] = contact
+
+    def remContact(self, userHandle):
+        """
+        Remove a contact
+        """
+        try:
+            del self.contacts[userHandle]
+        except KeyError: pass
+
+    def getContact(self, userHandle):
+        """
+        Obtain the MSNContact object
+        associated with the given
+        userHandle.
+        @return: the MSNContact object if
+                 the user exists, or None.
+        """
+        try:
+            return self.contacts[userHandle]
+        except KeyError:
+            return None
+
+    def getBlockedContacts(self):
+        """
+        Obtain all the contacts on my block list
+        """
+        return self._getContactsFromList(BLOCK_LIST)
+
+    def getAuthorizedContacts(self):
+        """
+        Obtain all the contacts on my auth list.
+        (These are contacts which I have verified
+        can view my state changes).
+        """
+        return self._getContactsFromList(ALLOW_LIST)
+
+    def getReverseContacts(self):
+        """
+        Get all contacts on my reverse list.
+        (These are contacts which have added me
+        to their forward list).
+        """
+        return self._getContactsFromList(REVERSE_LIST)
+
+    def getContacts(self):
+        """
+        Get all contacts on my forward list.
+        (These are the contacts which I have added
+        to my list).
+        """
+        return self._getContactsFromList(FORWARD_LIST)
+
+    def setGroup(self, id, name):
+        """
+        Keep a mapping from the given id
+        to the given name.
+        """
+        self.groups[id] = name
+
+    def remGroup(self, id):
+        """
+        Removed the stored group
+        mapping for the given id.
+        """
+        try:
+            del self.groups[id]
+        except KeyError: pass
+        for c in self.contacts:
+            if id in c.groups: c.groups.remove(id)
+
+
+class MSNEventBase(LineReceiver):
+    """
+    This class provides support for handling / dispatching events and is the
+    base class of the three main client protocols (DispatchClient,
+    NotificationClient, SwitchboardClient)
+    """
+
+    def __init__(self):
+        self.ids = {} # mapping of ids to Deferreds
+        self.currentID = 0
+        self.connected = 0
+        self.setLineMode()
+        self.currentMessage = None
+
+    def connectionLost(self, reason):
+        self.ids = {}
+        self.connected = 0
+
+    def connectionMade(self):
+        self.connected = 1
+
+    def _fireCallback(self, id, *args):
+        """
+        Fire the callback for the given id
+        if one exists and return 1, else return false
+        """
+        if self.ids.has_key(id):
+            self.ids[id][0].callback(args)
+            del self.ids[id]
+            return 1
+        return 0
+
+    def _nextTransactionID(self):
+        """ return a usable transaction ID """
+        self.currentID += 1
+        if self.currentID > 1000: self.currentID = 1
+        return self.currentID
+
+    def _createIDMapping(self, data=None):
+        """
+        return a unique transaction ID that is mapped internally to a
+        deferred .. also store arbitrary data if it is needed
+        """
+        id = self._nextTransactionID()
+        d = Deferred()
+        self.ids[id] = (d, data)
+        return (id, d)
+
+    def checkMessage(self, message):
+        """
+        process received messages to check for file invitations and
+        typing notifications and other control type messages
+        """
+        raise NotImplementedError
+
+    def sendLine(self, line):
+        if LINEDEBUG: log.msg("<< " + line)
+        LineReceiver.sendLine(self, line)
+
+    def lineReceived(self, line):
+        if LINEDEBUG: log.msg(">> " + line)
+        if not self.connected: return
+        if self.currentMessage:
+            self.currentMessage.readPos += len(line+"\r\n")
+            try:
+                header, value = line.split(':')
+                self.currentMessage.setHeader(header, unquote(value).lstrip())
+                return
+            except ValueError:
+                #raise MSNProtocolError, "Invalid Message Header"
+                line = ""
+            if line == "" or self.currentMessage.specialMessage:
+                self.setRawMode()
+                if self.currentMessage.readPos == self.currentMessage.length: self.rawDataReceived("") # :(
+                return
+        try:
+            cmd, params = line.split(' ', 1)
+        except ValueError:
+            raise MSNProtocolError, "Invalid Message, %s" % repr(line)
+
+        if len(cmd) != 3: raise MSNProtocolError, "Invalid Command, %s" % repr(cmd)
+        if cmd.isdigit():
+            id = params.split(' ')[0]
+            if id.isdigit() and self.ids.has_key(int(id)):
+                id = int(id)
+                self.ids[id][0].errback(int(cmd))
+                del self.ids[id]
+                return
+            else:       # we received an error which doesn't map to a sent command
+                self.gotError(int(cmd))
+                return
+
+        handler = getattr(self, "handle_%s" % cmd.upper(), None)
+        if handler:
+            try: handler(params.split(' '))
+            except MSNProtocolError, why: self.gotBadLine(line, why)
+        else:
+            self.handle_UNKNOWN(cmd, params.split(' '))
+
+    def rawDataReceived(self, data):
+        if not self.connected: return
+        extra = ""
+        self.currentMessage.readPos += len(data)
+        diff = self.currentMessage.readPos - self.currentMessage.length
+        if diff > 0:
+            self.currentMessage.message += data[:-diff]
+            extra = data[-diff:]
+        elif diff == 0:
+            self.currentMessage.message += data
+        else:
+            self.currentMessage.message += data
+            return
+        del self.currentMessage.readPos
+        m = self.currentMessage
+        self.currentMessage = None
+        if MESSAGEDEBUG: log.msg(m.message)
+        try:
+            if not self.checkMessage(m):
+                self.setLineMode(extra)
+                return
+        except Exception, e:
+            self.setLineMode(extra)
+            raise
+        self.gotMessage(m)
+        self.setLineMode(extra)
+
+    ### protocol command handlers - no need to override these.
+
+    def handle_MSG(self, params):
+        checkParamLen(len(params), 3, 'MSG')
+        try:
+            messageLen = int(params[2])
+        except ValueError: raise MSNProtocolError, "Invalid Parameter for MSG length argument"
+        self.currentMessage = MSNMessage(length=messageLen, userHandle=params[0], screenName=unquote(params[1]))
+
+    def handle_UNKNOWN(self, cmd, params):
+        """ implement me in subclasses if you want to handle unknown events """
+        log.msg("Received unknown command (%s), params: %s" % (cmd, params))
+
+    ### callbacks
+
+    def gotBadLine(self, line, why):
+        """ called when a handler notifies me that this line is broken """
+        log.msg('Error in line: %s (%s)' % (line, why))
+
+    def gotError(self, errorCode):
+        """
+        called when the server sends an error which is not in
+        response to a sent command (ie. it has no matching transaction ID)
+        """
+        log.msg('Error %s' % (errorCodes[errorCode]))
+
+
+class DispatchClient(MSNEventBase):
+    """
+    This class provides support for clients connecting to the dispatch server
+    @ivar userHandle: your user handle (passport) needed before connecting.
+    """
+
+    def connectionMade(self):
+        MSNEventBase.connectionMade(self)
+        self.sendLine('VER %s %s' % (self._nextTransactionID(), MSN_PROTOCOL_VERSION))
+
+    ### protocol command handlers ( there is no need to override these )
+
+    def handle_VER(self, params):
+        versions = params[1:]
+        if versions is None or ' '.join(versions) != MSN_PROTOCOL_VERSION:
+            self.transport.loseConnection()
+            raise MSNProtocolError, "Invalid version response"
+        id = self._nextTransactionID()
+        self.sendLine("CVR %s %s %s" % (id, MSN_CVR_STR, self.factory.userHandle))
+
+    def handle_CVR(self, params):
+        self.sendLine("USR %s TWN I %s" % (self._nextTransactionID(), self.factory.userHandle))
+
+    def handle_XFR(self, params):
+        if len(params) < 4: raise MSNProtocolError, "Invalid number of parameters for XFR"
+        id, refType, addr = params[:3]
+        # was addr a host:port pair?
+        try:
+            host, port = addr.split(':')
+        except ValueError:
+            host = addr
+            port = MSN_PORT
+        if refType == "NS":
+            self.gotNotificationReferral(host, int(port))
+
+    ### callbacks
+
+    def gotNotificationReferral(self, host, port):
+        """
+        called when we get a referral to the notification server.
+
+        @param host: the notification server's hostname
+        @param port: the port to connect to
+        """
+        pass
+
+
+class DispatchFactory(ClientFactory):
+    """
+    This class keeps the state for the DispatchClient.
+
+    @ivar userHandle: the userHandle to request a notification
+                      server for.
+    """
+    protocol = DispatchClient
+    userHandle = ""
+
+
+
+class NotificationClient(MSNEventBase):
+    """
+    This class provides support for clients connecting
+    to the notification server.
+    """
+
+    factory = None # sssh pychecker
+
+    def __init__(self, currentID=0):
+        MSNEventBase.__init__(self)
+        self.currentID = currentID
+        self._state = ['DISCONNECTED', {}]
+        self.pingCounter = 0
+        self.pingCheckTask = None
+        self.msnobj = MSNObject()
+
+    def _setState(self, state):
+        self._state[0] = state
+
+    def _getState(self):
+        return self._state[0]
+
+    def _getStateData(self, key):
+        return self._state[1][key]
+
+    def _setStateData(self, key, value):
+        self._state[1][key] = value
+
+    def _remStateData(self, *args):
+        for key in args: del self._state[1][key]
+
+    def connectionMade(self):
+        MSNEventBase.connectionMade(self)
+        self._setState('CONNECTED')
+        self.sendLine("VER %s %s" % (self._nextTransactionID(), MSN_PROTOCOL_VERSION))
+        self.factory.resetDelay()
+
+    def connectionLost(self, reason):
+        self._setState('DISCONNECTED')
+        self._state[1] = {}
+        if self.pingCheckTask:
+            self.pingCheckTask.stop()
+            self.pingCheckTask = None
+        MSNEventBase.connectionLost(self, reason)
+
+    def _getEmailFields(self, message):
+        fields = message.getMessage().strip().split('\n')
+        values = {}
+        for i in fields:
+            a = i.split(':')
+            if len(a) != 2: continue
+            f, v = a
+            f = f.strip()
+            v = v.strip()
+            values[f] = v
+        return values
+
+    def _gotInitialEmailNotification(self, message):
+        values = self._getEmailFields(message)
+        try:
+            inboxunread = int(values["Inbox-Unread"])
+            foldersunread = int(values["Folders-Unread"])
+        except KeyError:
+            return
+        if foldersunread + inboxunread > 0: # For some reason MSN sends notifications about empty inboxes sometimes?
+            self.gotInitialEmailNotification(inboxunread, foldersunread)
+
+    def _gotEmailNotification(self, message):
+        values = self._getEmailFields(message)
+        try:
+            mailfrom = values["From"]
+            fromaddr = values["From-Addr"]
+            subject = values["Subject"]
+            junkbeginning = "=?\"us-ascii\"?Q?"
+            junkend = "?="
+            subject = subject.replace(junkbeginning, "").replace(junkend, "").replace("_", " ")
+        except KeyError:
+            # If any of the fields weren't found then it's not a big problem. We just ignore the message
+            return
+        self.gotRealtimeEmailNotification(mailfrom, fromaddr, subject)
+
+    def _gotMSNAlert(self, message):
+        notification = parseText(message.message, beExtremelyLenient=True)
+        siteurl = notification.getAttribute("siteurl")
+        notid = notification.getAttribute("id")
+
+        msg = None
+        for e in notification.elements():
+            if e.name == "MSG":
+                msg = e
+                break
+        else: return
+
+        msgid = msg.getAttribute("id")
+
+        action = None
+        subscr = None
+        bodytext = None
+        for e in msg.elements():
+            if e.name == "ACTION":
+                action = e.getAttribute("url")
+            if e.name == "SUBSCR":
+                subscr = e.getAttribute("url")
+            if e.name == "BODY":
+                for e2 in e.elements():
+                    if e2.name == "TEXT":
+                        bodytext = e2.__str__()
+        if not (action and subscr and bodytext): return
+
+        actionurl = "%s&notification_id=%s&message_id=%s&agent=messenger" % (action, notid, msgid) # Used to have $siteurl// at the beginning, but it seems to not work with that now. Weird
+        subscrurl = "%s&notification_id=%s&message_id=%s&agent=messenger" % (subscr, notid, msgid)
+
+        self.gotMSNAlert(bodytext, actionurl, subscrurl)
+
+    def _gotUBX(self, message):
+        msnContact = self.factory.contacts.getContact(message.userHandle)
+        if not msnContact: return
+        lm = message.message.lower()
+        p1 = lm.find("<psm>") + 5
+        p2 = lm.find("</psm>")
+        if p1 >= 0 and p2 >= 0:
+            personal = unescapeFromXml(message.message[p1:p2])
+            msnContact.personal = personal
+            self.contactPersonalChanged(message.userHandle, personal)
+        else:
+            msnContact.personal = ''
+            self.contactPersonalChanged(message.userHandle, '')
+
+    def checkMessage(self, message):
+        """ hook used for detecting specific notification messages """
+        cTypes = [s.lstrip() for s in message.getHeader('Content-Type').split(';')]
+        if 'text/x-msmsgsprofile' in cTypes:
+            self.gotProfile(message)
+            return 0
+        elif "text/x-msmsgsinitialemailnotification" in cTypes:
+            self._gotInitialEmailNotification(message)
+            return 0
+        elif "text/x-msmsgsemailnotification" in cTypes:
+            self._gotEmailNotification(message)
+            return 0
+        elif "NOTIFICATION" == message.userHandle and message.specialMessage == True:
+            self._gotMSNAlert(message)
+            return 0
+        elif "UBX" == message.screenName and message.specialMessage == True:
+            self._gotUBX(message)
+            return 0
+        return 1
+
+    ### protocol command handlers - no need to override these
+
+    def handle_VER(self, params):
+        versions = params[1:]
+        if versions is None or ' '.join(versions) != MSN_PROTOCOL_VERSION:
+            self.transport.loseConnection()
+            raise MSNProtocolError, "Invalid version response"
+        self.sendLine("CVR %s %s %s" % (self._nextTransactionID(), MSN_CVR_STR, self.factory.userHandle))
+
+    def handle_CVR(self, params):
+        self.sendLine("USR %s TWN I %s" % (self._nextTransactionID(), self.factory.userHandle))
+
+    def handle_USR(self, params):
+        if not (4 <= len(params) <= 6):
+            raise MSNProtocolError, "Invalid Number of Parameters for USR"
+
+        mechanism = params[1]
+        if mechanism == "OK":
+            self.loggedIn(params[2], int(params[3]))
+        elif params[2].upper() == "S":
+            # we need to obtain auth from a passport server
+            f = self.factory
+            d = _login(f.userHandle, f.password, f.passportServer, authData=params[3])
+            d.addCallback(self._passportLogin)
+            d.addErrback(self._passportError)
+
+    def _passportLogin(self, result):
+        if result[0] == LOGIN_REDIRECT:
+            d = _login(self.factory.userHandle, self.factory.password,
+                       result[1], cached=1, authData=result[2])
+            d.addCallback(self._passportLogin)
+            d.addErrback(self._passportError)
+        elif result[0] == LOGIN_SUCCESS:
+            self.sendLine("USR %s TWN S %s" % (self._nextTransactionID(), result[1]))
+        elif result[0] == LOGIN_FAILURE:
+            self.loginFailure(result[1])
+
+    def _passportError(self, failure):
+        self.loginFailure("Exception while authenticating: %s" % failure)
+
+    def handle_CHG(self, params):
+        id = int(params[0])
+        if not self._fireCallback(id, params[1]):
+            if self.factory: self.factory.status = params[1]
+            self.statusChanged(params[1])
+
+    def handle_ILN(self, params):
+        #checkParamLen(len(params), 6, 'ILN')
+        msnContact = self.factory.contacts.getContact(params[2])
+        if not msnContact: return
+        msnContact.status = params[1]
+        msnContact.screenName = unquote(params[3])
+        if len(params) > 4: msnContact.caps = int(params[4])
+        if len(params) > 5:
+            self.handleAvatarHelper(msnContact, params[5])
+        else:
+            self.handleAvatarGoneHelper(msnContact)
+        self.gotContactStatus(params[2], params[1], unquote(params[3]))
+
+    def handleAvatarGoneHelper(self, msnContact):
+        if msnContact.msnobj:
+            msnContact.msnobj = None
+            msnContact.msnobjGot = True
+            self.contactAvatarChanged(msnContact.userHandle, "")
+
+    def handleAvatarHelper(self, msnContact, msnobjStr):
+        msnobj = MSNObject(unquote(msnobjStr))
+        if not msnContact.msnobj or msnobj.sha1d != msnContact.msnobj.sha1d:
+            if MSNP2PDEBUG: log.msg("Updated MSNObject received!" + msnobjStr)
+            msnContact.msnobj = msnobj
+            msnContact.msnobjGot = False
+            self.contactAvatarChanged(msnContact.userHandle, binascii.hexlify(b64dec(msnContact.msnobj.sha1d)))
+
+    def handle_CHL(self, params):
+        checkParamLen(len(params), 2, 'CHL')
+        response = msnp11chl.doChallenge(params[1])
+        self.sendLine("QRY %s %s %s" % (self._nextTransactionID(), msnp11chl.MSNP11_PRODUCT_ID, len(response)))
+        self.transport.write(response)
+
+    def handle_QRY(self, params):
+        pass
+
+    def handle_NLN(self, params):
+        if not self.factory: return
+        msnContact = self.factory.contacts.getContact(params[1])
+        if not msnContact: return
+        msnContact.status = params[0]
+        msnContact.screenName = unquote(params[2])
+        if len(params) > 3: msnContact.caps = int(params[3])
+        if len(params) > 4:
+            self.handleAvatarHelper(msnContact, params[4])
+        else:
+            self.handleAvatarGoneHelper(msnContact)
+        self.contactStatusChanged(params[1], params[0], unquote(params[2]))
+
+    def handle_FLN(self, params):
+        checkParamLen(len(params), 1, 'FLN')
+        msnContact = self.factory.contacts.getContact(params[0])
+        if msnContact:
+            msnContact.status = STATUS_OFFLINE
+        self.contactOffline(params[0])
+
+    def handle_LST(self, params):
+        if self._getState() != 'SYNC': return
+
+        userHandle, screenName, userGuid, lists, groups = getVals(params)
+
+        if not userHandle or lists < 1:
+            raise MSNProtocolError, "Unknown LST " + str(params) # debug
+        contact = MSNContact(userGuid, userHandle, screenName, lists)
+        if contact.lists & FORWARD_LIST:
+            contact.groups.extend(map(str, groups))
+        self._getStateData('list').addContact(contact)
+        self._setStateData('last_contact', contact)
+        sofar = self._getStateData('lst_sofar') + 1
+        if sofar == self._getStateData('lst_reply'):
+            # this is the best place to determine that
+            # a syn realy has finished - msn _may_ send
+            # BPR information for the last contact
+            # which is unfortunate because it means
+            # that the real end of a syn is non-deterministic.
+            # to handle this we'll keep 'last_contact' hanging
+            # around in the state data and update it if we need
+            # to later.
+            self._setState('SESSION')
+            contacts = self._getStateData('list')
+            phone = self._getStateData('phone')
+            id = self._getStateData('synid')
+            self._remStateData('lst_reply', 'lsg_reply', 'lst_sofar', 'phone', 'synid', 'list')
+            self._fireCallback(id, contacts, phone)
+        else:
+            self._setStateData('lst_sofar',sofar)
+
+    def handle_BLP(self, params):
+        # check to see if this is in response to a SYN
+        if self._getState() == 'SYNC':
+            self._getStateData('list').privacy = listCodeToID[params[0].lower()]
+        else:
+            id = int(params[0])
+            self.factory.contacts.privacy = listCodeToID[params[1].lower()]
+            self._fireCallback(id, params[1])
+
+    def handle_GTC(self, params):
+        # check to see if this is in response to a SYN
+        if self._getState() == 'SYNC':
+            if params[0].lower() == "a": self._getStateData('list').autoAdd = 0
+            elif params[0].lower() == "n": self._getStateData('list').autoAdd = 1
+            else: raise MSNProtocolError, "Invalid Paramater for GTC" # debug
+        else:
+            id = int(params[0])
+            if params[1].lower() == "a": self._fireCallback(id, 0)
+            elif params[1].lower() == "n": self._fireCallback(id, 1)
+            else: raise MSNProtocolError, "Invalid Paramater for GTC" # debug
+
+    def handle_SYN(self, params):
+        id = int(params[0])
+        self._setStateData('phone', []) # Always needs to be set
+        if params[3] == 0: # No LST will be received. New account?
+            self._setState('SESSION')
+            self._fireCallback(id, None, None)
+        else:
+            contacts = MSNContactList()
+            self._setStateData('list', contacts)
+            self._setStateData('lst_reply', int(params[3]))
+            self._setStateData('lsg_reply', int(params[4]))
+            self._setStateData('lst_sofar', 0)
+
+    def handle_LSG(self, params):
+        if self._getState() == 'SYNC':
+            self._getStateData('list').groups[params[1]] = unquote(params[0])
+
+    def handle_PRP(self, params):
+        if params[1] == "MFN":
+            self._fireCallback(int(params[0]))
+        elif self._getState() == 'SYNC':
+            self._getStateData('phone').append((params[0], unquote(params[1])))
+        else:
+            self._fireCallback(int(params[0]), int(params[1]), unquote(params[3]))
+
+    def handle_BPR(self, params):
+        numParams = len(params)
+        if numParams == 2: # part of a syn
+            self._getStateData('last_contact').setPhone(params[0], unquote(params[1]))
+        elif numParams == 4:
+            if not self.factory.contacts: raise MSNProtocolError, "handle_BPR called with no contact list" # debug
+            self.factory.contacts.version = int(params[0])
+            userHandle, phoneType, number = params[1], params[2], unquote(params[3])
+            self.factory.contacts.getContact(userHandle).setPhone(phoneType, number)
+            self.gotPhoneNumber(userHandle, phoneType, number)
+
+
+    def handle_ADG(self, params):
+        checkParamLen(len(params), 5, 'ADG')
+        id = int(params[0])
+        if not self._fireCallback(id, int(params[1]), unquote(params[2]), int(params[3])):
+            raise MSNProtocolError, "ADG response does not match up to a request" # debug
+
+    def handle_RMG(self, params):
+        checkParamLen(len(params), 3, 'RMG')
+        id = int(params[0])
+        if not self._fireCallback(id, int(params[1]), int(params[2])):
+            raise MSNProtocolError, "RMG response does not match up to a request" # debug
+
+    def handle_REG(self, params):
+        checkParamLen(len(params), 5, 'REG')
+        id = int(params[0])
+        if not self._fireCallback(id, int(params[1]), int(params[2]), unquote(params[3])):
+            raise MSNProtocolError, "REG response does not match up to a request" # debug
+
+    def handle_ADC(self, params):
+        if not self.factory.contacts: raise MSNProtocolError, "handle_ADC called with no contact list"
+        numParams = len(params)
+        if numParams < 3 or params[1].upper() not in ('AL','BL','RL','FL','PL'):
+            raise MSNProtocolError, "Invalid Paramaters for ADC" # debug
+        id = int(params[0])
+        listType = params[1].lower()
+        userHandle, screenName, userGuid, ignored1, groups = getVals(params[2:])
+
+        if groups and listType.upper() != FORWARD_LIST:
+            raise MSNProtocolError, "Only forward list can contain groups" # debug
+
+        if not self._fireCallback(id, listCodeToID[listType], userGuid, userHandle, screenName):
+            c = self.factory.contacts.getContact(userHandle)
+            if not c:
+                c = MSNContact(userGuid=userGuid, userHandle=userHandle, screenName=screenName)
+                self.factory.contacts.addContact(c)
+            c.addToList(PENDING_LIST)
+            self.userAddedMe(userGuid, userHandle, screenName)
+
+    def handle_REM(self, params):
+        if not self.factory.contacts: raise MSNProtocolError, "handle_REM called with no contact list available!"
+        numParams = len(params)
+        if numParams < 3 or params[1].upper() not in ('AL','BL','FL','RL','PL'):
+            raise MSNProtocolError, "Invalid Paramaters for REM" # debug
+        id = int(params[0])
+        listType = params[1].lower()
+        userHandle = params[2]
+        groupID = None
+        if numParams == 4:
+            if params[1] != "FL": raise MSNProtocolError, "Only forward list can contain groups" # debug
+            groupID = int(params[3])
+        if not self._fireCallback(id, listCodeToID[listType], userHandle, groupID):
+            if listType.upper() != "RL": return
+            c = self.factory.contacts.getContact(userHandle)
+            if not c: return
+            c.removeFromList(REVERSE_LIST)
+            if c.lists == 0: self.factory.contacts.remContact(c.userHandle)
+            self.userRemovedMe(userHandle)
+
+    def handle_XFR(self, params):
+        checkParamLen(len(params), 5, 'XFR')
+        id = int(params[0])
+        # check to see if they sent a host/port pair
+        try:
+            host, port = params[2].split(':')
+        except ValueError:
+            host = params[2]
+            port = MSN_PORT
+
+        if not self._fireCallback(id, host, int(port), params[4]):
+            raise MSNProtocolError, "Got XFR (referral) that I didn't ask for .. should this happen?" # debug
+
+    def handle_RNG(self, params):
+        checkParamLen(len(params), 6, 'RNG')
+        # check for host:port pair
+        try:
+            host, port = params[1].split(":")
+            port = int(port)
+        except ValueError:
+            host = params[1]
+            port = MSN_PORT
+        self.gotSwitchboardInvitation(int(params[0]), host, port, params[3], params[4],
+                                      unquote(params[5]))
+
+    def handle_NOT(self, params):
+        checkParamLen(len(params), 1, 'NOT')
+        try:
+            messageLen = int(params[0])
+        except ValueError: raise MSNProtocolError, "Invalid Parameter for NOT length argument"
+        self.currentMessage = MSNMessage(length=messageLen, userHandle="NOTIFICATION", specialMessage=True)
+        self.setRawMode()
+
+    def handle_UBX(self, params):
+        checkParamLen(len(params), 2, 'UBX')
+        try:
+            messageLen = int(params[1])
+        except ValueError: raise MSNProtocolError, "Invalid Parameter for UBX length argument"
+        if messageLen > 0:
+            self.currentMessage = MSNMessage(length=messageLen, userHandle=params[0], screenName="UBX", specialMessage=True)
+            self.setRawMode()
+        else:
+            self._gotUBX(MSNMessage(userHandle=params[0]))
+
+    def handle_UUX(self, params):
+        checkParamLen(len(params), 2, 'UUX')
+        if params[1] != '0': return
+        id = int(params[0])
+        self._fireCallback(id)
+
+    def handle_OUT(self, params):
+        checkParamLen(len(params), 1, 'OUT')
+        self.factory.stopTrying()
+        if params[0] == "OTH": self.multipleLogin()
+        elif params[0] == "SSD": self.serverGoingDown()
+        else: raise MSNProtocolError, "Invalid Parameters received for OUT" # debug
+
+    def handle_QNG(self, params):
+        self.pingCounter = 0 # They replied to a ping. We'll forgive them for any they may have missed, because they're alive again now
+
+    # callbacks
+
+    def pingChecker(self):
+        if self.pingCounter > 5:
+            # The server has ignored 5 pings, lets kill the connection
+            self.transport.loseConnection()
+        else:
+            self.sendLine("PNG")
+            self.pingCounter += 1
+
+    def pingCheckerStart(self, *args):
+        self.pingCheckTask = task.LoopingCall(self.pingChecker)
+        self.pingCheckTask.start(PINGSPEED)
+
+    def loggedIn(self, userHandle, verified):
+        """
+        Called when the client has logged in.
+        The default behaviour of this method is to
+        update the factory with our screenName and
+        to sync the contact list (factory.contacts).
+        When this is complete self.listSynchronized
+        will be called.
+
+        @param userHandle: our userHandle
+        @param verified: 1 if our passport has been (verified), 0 if not.
+                         (i'm not sure of the significace of this)
+        @type verified: int
+        """
+        d = self.syncList()
+        d.addCallback(self.listSynchronized)
+        d.addCallback(self.pingCheckerStart)
+
+    def loginFailure(self, message):
+        """
+        Called when the client fails to login.
+
+        @param message: a message indicating the problem that was encountered
+        """
+        pass
+
+    def gotProfile(self, message):
+        """
+        Called after logging in when the server sends an initial
+        message with MSN/passport specific profile information
+        such as country, number of kids, etc.
+        Check the message headers for the specific values.
+
+        @param message: The profile message
+        """
+        pass
+
+    def listSynchronized(self, *args):
+        """
+        Lists are now synchronized by default upon logging in, this
+        method is called after the synchronization has finished
+        and the factory now has the up-to-date contacts.
+        """
+        pass
+
+    def contactAvatarChanged(self, userHandle, hash):
+        """
+        Called when we receive the first, or a new <msnobj/> from a
+        contact.
+
+        @param userHandle: contact who's msnobj has been changed
+        @param hash: sha1 hash of their avatar as hex string
+        """
+
+    def statusChanged(self, statusCode):
+        """
+        Called when our status changes and its not in response to a
+        client command.
+
+        @param statusCode: 3-letter status code
+        """
+        pass
+
+    def gotContactStatus(self, userHandle, statusCode, screenName):
+        """
+        Called when we receive a list of statuses upon login.
+
+        @param userHandle: the contact's user handle (passport)
+        @param statusCode: 3-letter status code
+        @param screenName: the contact's screen name
+        """
+        pass
+
+    def contactStatusChanged(self, userHandle, statusCode, screenName):
+        """
+        Called when we're notified that a contact's status has changed.
+
+        @param userHandle: the contact's user handle (passport)
+        @param statusCode: 3-letter status code
+        @param screenName: the contact's screen name
+        """
+        pass
+
+    def contactPersonalChanged(self, userHandle, personal):
+        """
+        Called when a contact's personal message changes.
+
+        @param userHandle: the contact who changed their personal message
+        @param personal  : the new personal message
+        """
+        pass
+
+    def contactOffline(self, userHandle):
+        """
+        Called when a contact goes offline.
+
+        @param userHandle: the contact's user handle
+        """
+        pass
+
+    def gotMessage(self, message):
+        """
+        Called when there is a message from the notification server
+        that is not understood by default.
+
+        @param message: the MSNMessage.
+        """
+        pass
+
+    def gotMSNAlert(self, body, action, subscr):
+        """
+        Called when the server sends an MSN Alert (http://alerts.msn.com)
+
+        @param body  : the alert text
+        @param action: a URL with more information for the user to view
+        @param subscr: a URL the user can use to modify their alert subscription
+        """
+        pass
+
+    def gotInitialEmailNotification(self, inboxunread, foldersunread):
+        """
+        Called when the server sends you details about your hotmail
+        inbox. This is only ever called once, on login.
+
+        @param inboxunread  : the number of unread items in your inbox
+        @param foldersunread: the number of unread items in other folders
+        """
+        pass
+
+    def gotRealtimeEmailNotification(self, mailfrom, fromaddr, subject):
+        """
+        Called when the server sends us realtime email
+        notification. This means that you have received
+        a new email in your hotmail inbox.
+
+        @param mailfrom: the sender of the email
+        @param fromaddr: the sender of the email (I don't know :P)
+        @param subject : the email subject
+        """
+        pass
+
+    def gotPhoneNumber(self, userHandle, phoneType, number):
+        """
+        Called when the server sends us phone details about
+        a specific user (for example after a user is added
+        the server will send their status, phone details etc.
+
+        @param userHandle: the contact's user handle (passport)
+        @param phoneType: the specific phoneType
+                          (*_PHONE constants or HAS_PAGER)
+        @param number: the value/phone number.
+        """
+        pass
+
+    def userAddedMe(self, userGuid, userHandle, screenName):
+        """
+        Called when a user adds me to their list. (ie. they have been added to
+        the reverse list.
+
+        @param userHandle: the userHandle of the user
+        @param screenName: the screen name of the user
+        """
+        pass
+
+    def userRemovedMe(self, userHandle):
+        """
+        Called when a user removes us from their contact list
+        (they are no longer on our reverseContacts list.
+
+        @param userHandle: the contact's user handle (passport)
+        """
+        pass
+
+    def gotSwitchboardInvitation(self, sessionID, host, port,
+                                 key, userHandle, screenName):
+        """
+        Called when we get an invitation to a switchboard server.
+        This happens when a user requests a chat session with us.
+
+        @param sessionID: session ID number, must be remembered for logging in
+        @param host: the hostname of the switchboard server
+        @param port: the port to connect to
+        @param key: used for authorization when connecting
+        @param userHandle: the user handle of the person who invited us
+        @param screenName: the screen name of the person who invited us
+        """
+        pass
+
+    def multipleLogin(self):
+        """
+        Called when the server says there has been another login
+        under our account, the server should disconnect us right away.
+        """
+        pass
+
+    def serverGoingDown(self):
+        """
+        Called when the server has notified us that it is going down for
+        maintenance.
+        """
+        pass
+
+    # api calls
+
+    def changeStatus(self, status):
+        """
+        Change my current status. This method will add
+        a default callback to the returned Deferred
+        which will update the status attribute of the
+        factory.
+
+        @param status: 3-letter status code (as defined by
+                       the STATUS_* constants)
+        @return: A Deferred, the callback of which will be
+                 fired when the server confirms the change
+                 of status.  The callback argument will be
+                 a tuple with the new status code as the
+                 only element.
+        """
+        
+        id, d = self._createIDMapping()
+        self.sendLine("CHG %s %s %s %s" % (id, status, str(MSNContact.MSNC1 | MSNContact.MSNC2 | MSNContact.MSNC3 | MSNContact.MSNC4), quote(self.msnobj.text)))
+        def _cb(r):
+            self.factory.status = r[0]
+            return r
+        return d.addCallback(_cb)
+
+    def setPrivacyMode(self, privLevel):
+        """
+        Set my privacy mode on the server.
+
+        B{Note}:
+        This only keeps the current privacy setting on
+        the server for later retrieval, it does not
+        effect the way the server works at all.
+
+        @param privLevel: This parameter can be true, in which
+                          case the server will keep the state as
+                          'al' which the official client interprets
+                          as -> allow messages from only users on
+                          the allow list.  Alternatively it can be
+                          false, in which case the server will keep
+                          the state as 'bl' which the official client
+                          interprets as -> allow messages from all
+                          users except those on the block list.
+                          
+        @return: A Deferred, the callback of which will be fired when
+                 the server replies with the new privacy setting.
+                 The callback argument will be a tuple, the only element
+                 of which being either 'al' or 'bl' (the new privacy setting).
+        """
+
+        id, d = self._createIDMapping()
+        if privLevel: self.sendLine("BLP %s AL" % id)
+        else: self.sendLine("BLP %s BL" % id)
+        return d
+
+    def syncList(self):
+        """
+        Used for keeping an up-to-date contact list.
+        A callback is added to the returned Deferred
+        that updates the contact list on the factory
+        and also sets my state to STATUS_ONLINE.
+
+        B{Note}:
+        This is called automatically upon signing
+        in using the version attribute of
+        factory.contacts, so you may want to persist
+        this object accordingly. Because of this there
+        is no real need to ever call this method
+        directly.
+
+        @return: A Deferred, the callback of which will be
+                 fired when the server sends an adequate reply.
+                 The callback argument will be a tuple with two
+                 elements, the new list (MSNContactList) and
+                 your current state (a dictionary).  If the version
+                 you sent _was_ the latest list version, both elements
+                 will be None. To just request the list send a version of 0.
+        """
+
+        self._setState('SYNC')
+        id, d = self._createIDMapping(data=None)
+        self._setStateData('synid',id)
+        self.sendLine("SYN %s %s %s" % (id, 0, 0))
+        def _cb(r):
+            self.changeStatus(STATUS_ONLINE)
+            if r[0] is not None:
+                self.factory.contacts = r[0]
+            return r
+        return d.addCallback(_cb)
+
+    def setPhoneDetails(self, phoneType, value):
+        """
+        Set/change my phone numbers stored on the server.
+
+        @param phoneType: phoneType can be one of the following
+                          constants - HOME_PHONE, WORK_PHONE,
+                          MOBILE_PHONE, HAS_PAGER.
+                          These are pretty self-explanatory, except
+                          maybe HAS_PAGER which refers to whether or
+                          not you have a pager.
+        @param value: for all of the *_PHONE constants the value is a
+                      phone number (str), for HAS_PAGER accepted values
+                      are 'Y' (for yes) and 'N' (for no).
+
+        @return: A Deferred, the callback for which will be fired when
+                 the server confirms the change has been made. The
+                 callback argument will be a tuple with 2 elements, the
+                 first being the new list version (int) and the second
+                 being the new phone number value (str).
+        """
+        raise "ProbablyDoesntWork"
+        # XXX: Add a default callback which updates
+        # factory.contacts.version and the relevant phone
+        # number
+        id, d = self._createIDMapping()
+        self.sendLine("PRP %s %s %s" % (id, phoneType, quote(value)))
+        return d
+
+    def addListGroup(self, name):
+        """
+        Used to create a new list group.
+        A default callback is added to the
+        returned Deferred which updates the
+        contacts attribute of the factory.
+
+        @param name: The desired name of the new group.
+
+        @return: A Deferred, the callbacck for which will be called
+                 when the server clarifies that the new group has been
+                 created.  The callback argument will be a tuple with 3
+                 elements: the new list version (int), the new group name
+                 (str) and the new group ID (int).
+        """
+
+        raise "ProbablyDoesntWork"
+        id, d = self._createIDMapping()
+        self.sendLine("ADG %s %s 0" % (id, quote(name)))
+        def _cb(r):
+            if self.factory.contacts:
+                self.factory.contacts.version = r[0]
+                self.factory.contacts.setGroup(r[1], r[2])
+            return r
+        return d.addCallback(_cb)
+
+    def remListGroup(self, groupID):
+        """
+        Used to remove a list group.
+        A default callback is added to the
+        returned Deferred which updates the
+        contacts attribute of the factory.
+
+        @param groupID: the ID of the desired group to be removed.
+
+        @return: A Deferred, the callback for which will be called when
+                 the server clarifies the deletion of the group.
+                 The callback argument will be a tuple with 2 elements:
+                 the new list version (int) and the group ID (int) of
+                 the removed group.
+        """
+
+        raise "ProbablyDoesntWork"
+        id, d = self._createIDMapping()
+        self.sendLine("RMG %s %s" % (id, groupID))
+        def _cb(r):
+            self.factory.contacts.version = r[0]
+            self.factory.contacts.remGroup(r[1])
+            return r
+        return d.addCallback(_cb)
+
+    def renameListGroup(self, groupID, newName):
+        """
+        Used to rename an existing list group.
+        A default callback is added to the returned
+        Deferred which updates the contacts attribute
+        of the factory.
+
+        @param groupID: the ID of the desired group to rename.
+        @param newName: the desired new name for the group.
+
+        @return: A Deferred, the callback for which will be called
+                 when the server clarifies the renaming.
+                 The callback argument will be a tuple of 3 elements,
+                 the new list version (int), the group id (int) and
+                 the new group name (str).
+        """
+        
+        raise "ProbablyDoesntWork"
+        id, d = self._createIDMapping()
+        self.sendLine("REG %s %s %s 0" % (id, groupID, quote(newName)))
+        def _cb(r):
+            self.factory.contacts.version = r[0]
+            self.factory.contacts.setGroup(r[1], r[2])
+            return r
+        return d.addCallback(_cb)
+
+    def addContact(self, listType, userHandle):
+        """
+        Used to add a contact to the desired list.
+        A default callback is added to the returned
+        Deferred which updates the contacts attribute of
+        the factory with the new contact information.
+        If you are adding a contact to the forward list
+        and you want to associate this contact with multiple
+        groups then you will need to call this method for each
+        group you would like to add them to, changing the groupID
+        parameter. The default callback will take care of updating
+        the group information on the factory's contact list.
+
+        @param listType: (as defined by the *_LIST constants)
+        @param userHandle: the user handle (passport) of the contact
+                           that is being added
+
+        @return: A Deferred, the callback for which will be called when
+                 the server has clarified that the user has been added.
+                 The callback argument will be a tuple with 4 elements:
+                 the list type, the contact's user handle, the new list
+                 version, and the group id (if relevant, otherwise it
+                 will be None)
+        """
+        
+        id, d = self._createIDMapping()
+        try: # Make sure the contact isn't actually on the list
+            if self.factory.contacts.getContact(userHandle).lists & listType: return
+        except AttributeError: pass
+        listType = listIDToCode[listType].upper()
+        if listType == "FL":
+            self.sendLine("ADC %s %s N=%s F=%s" % (id, listType, userHandle, userHandle))
+        else:
+            self.sendLine("ADC %s %s N=%s" % (id, listType, userHandle))
+
+        def _cb(r):
+            if not self.factory: return
+            c = self.factory.contacts.getContact(r[2])
+            if not c:
+                c = MSNContact(userGuid=r[1], userHandle=r[2], screenName=r[3])
+                self.factory.contacts.addContact(c)
+            #if r[3]: c.groups.append(r[3])
+            c.addToList(r[0])
+            return r
+        return d.addCallback(_cb)
+
+    def remContact(self, listType, userHandle):
+        """
+        Used to remove a contact from the desired list.
+        A default callback is added to the returned deferred
+        which updates the contacts attribute of the factory
+        to reflect the new contact information.
+
+        @param listType: (as defined by the *_LIST constants)
+        @param userHandle: the user handle (passport) of the
+                           contact being removed
+
+        @return: A Deferred, the callback for which will be called when
+                 the server has clarified that the user has been removed.
+                 The callback argument will be a tuple of 3 elements:
+                 the list type, the contact's user handle and the group ID
+                 (if relevant, otherwise it will be None)
+        """
+        
+        id, d = self._createIDMapping()
+        try: # Make sure the contact is actually on this list
+            if not (self.factory.contacts.getContact(userHandle).lists & listType): return
+        except AttributeError: return
+        listType = listIDToCode[listType].upper()
+        if listType == "FL":
+            try:
+                c = self.factory.contacts.getContact(userHandle)
+                userGuid = c.userGuid
+            except AttributeError: return
+            self.sendLine("REM %s FL %s" % (id, userGuid))
+        else:
+            self.sendLine("REM %s %s %s" % (id, listType, userHandle))
+
+        def _cb(r):
+            if listType == "FL":
+                r = (r[0], userHandle, r[2]) # make sure we always get a userHandle
+            l = self.factory.contacts
+            c = l.getContact(r[1])
+            if not c: return
+            group = r[2]
+            shouldRemove = 1
+            if group: # they may not have been removed from the list
+                c.groups.remove(group)
+                if c.groups: shouldRemove = 0
+            if shouldRemove:
+                c.removeFromList(r[0])
+                if c.lists == 0: l.remContact(c.userHandle)
+            return r
+        return d.addCallback(_cb)
+
+    def changeScreenName(self, newName):
+        """
+        Used to change your current screen name.
+        A default callback is added to the returned
+        Deferred which updates the screenName attribute
+        of the factory and also updates the contact list
+        version.
+
+        @param newName: the new screen name
+
+        @return: A Deferred, the callback for which will be called
+                 when the server acknowledges the change.
+                 The callback argument will be an empty tuple.
+        """
+
+        id, d = self._createIDMapping()
+        self.sendLine("PRP %s MFN %s" % (id, quote(newName)))
+        def _cb(r):
+            self.factory.screenName = newName
+            return r
+        return d.addCallback(_cb)
+
+    def changePersonalMessage(self, personal):
+        """
+        Used to change your personal message.
+
+        @param personal: the new screen name
+
+        @return: A Deferred, the callback for which will be called
+                 when the server acknowledges the change.
+                 The callback argument will be a tuple of 1 element,
+                 the personal message.
+        """
+
+        id, d = self._createIDMapping()
+        data = ""
+        if personal:
+            data = "<Data><PSM>" + personal + "</PSM><CurrentMedia></CurrentMedia></Data>"
+        self.sendLine("UUX %s %s" % (id, len(data)))
+        self.transport.write(data)
+        def _cb(r):
+            self.factory.personal = personal
+            return (personal,)
+        return d.addCallback(_cb)
+
+    def changeAvatar(self, imageData, push):
+        """
+        Used to change the avatar that other users see.
+
+        @param imageData: the PNG image data to set as the avatar
+        @param push     : whether to push the update to the server
+                          (it will otherwise be sent with the next
+                          changeStatus())
+
+        @return: If push==True, a Deferred, the callback for which
+                 will be called when the server acknowledges the change.
+                 The callback argument will be the same as for changeStatus.
+        """
+
+        if self.msnobj and imageData == self.msnobj.imageData: return
+        if imageData:
+            self.msnobj.setData(self.factory.userHandle, imageData)
+        else:
+            self.msnobj.setNull()
+        if push: return self.changeStatus(self.factory.status) # Push to server
+
+
+    def requestSwitchboardServer(self):
+        """
+        Used to request a switchboard server to use for conversations.
+
+        @return: A Deferred, the callback for which will be called when
+                 the server responds with the switchboard information.
+                 The callback argument will be a tuple with 3 elements:
+                 the host of the switchboard server, the port and a key
+                 used for logging in.
+        """
+
+        id, d = self._createIDMapping()
+        self.sendLine("XFR %s SB" % id)
+        return d
+
+    def logOut(self):
+        """
+        Used to log out of the notification server.
+        After running the method the server is expected
+        to close the connection.
+        """
+        
+        if self.pingCheckTask:
+            self.pingCheckTask.stop()
+            self.pingCheckTask = None
+        self.factory.stopTrying()
+        self.sendLine("OUT")
+        self.transport.loseConnection()
+
+class NotificationFactory(ReconnectingClientFactory):
+    """
+    Factory for the NotificationClient protocol.
+    This is basically responsible for keeping
+    the state of the client and thus should be used
+    in a 1:1 situation with clients.
+
+    @ivar contacts: An MSNContactList instance reflecting
+                    the current contact list -- this is
+                    generally kept up to date by the default
+                    command handlers.
+    @ivar userHandle: The client's userHandle, this is expected
+                      to be set by the client and is used by the
+                      protocol (for logging in etc).
+    @ivar screenName: The client's current screen-name -- this is
+                      generally kept up to date by the default
+                      command handlers.
+    @ivar password: The client's password -- this is (obviously)
+                    expected to be set by the client.
+    @ivar passportServer: This must point to an msn passport server
+                          (the whole URL is required)
+    @ivar status: The status of the client -- this is generally kept
+                  up to date by the default command handlers
+    @ivar maxRetries: The number of times the factory will reconnect
+                      if the connection dies because of a network error.
+    """
+
+    contacts = None
+    userHandle = ''
+    screenName = ''
+    password = ''
+    passportServer = 'https://nexus.passport.com/rdr/pprdr.asp'
+    status = 'NLN'
+    protocol = NotificationClient
+    maxRetries = 5
+
+
+class SwitchboardClient(MSNEventBase):
+    """
+    This class provides support for clients connecting to a switchboard server.
+
+    Switchboard servers are used for conversations with other people
+    on the MSN network. This means that the number of conversations at
+    any given time will be directly proportional to the number of
+    connections to varioius switchboard servers.
+
+    MSN makes no distinction between single and group conversations,
+    so any number of users may be invited to join a specific conversation
+    taking place on a switchboard server.
+
+    @ivar key: authorization key, obtained when receiving
+               invitation / requesting switchboard server.
+    @ivar userHandle: your user handle (passport)
+    @ivar sessionID: unique session ID, used if you are replying
+                     to a switchboard invitation
+    @ivar reply: set this to 1 in connectionMade or before to signifiy
+                 that you are replying to a switchboard invitation.
+    @ivar msnobj: the MSNObject for the user's avatar. So that the
+                  switchboard can distribute it to anyone who asks.
+    """
+
+    key = 0
+    userHandle = ""
+    sessionID = ""
+    reply = 0
+    msnobj = None
+
+    _iCookie = 0
+
+    def __init__(self):
+        MSNEventBase.__init__(self)
+        self.pendingUsers = {}
+        self.cookies = {'iCookies' : {}} # will maybe be moved to a factory in the future
+        self.slpLinks = {}
+
+    def connectionMade(self):
+        MSNEventBase.connectionMade(self)
+        self._sendInit()
+
+    def connectionLost(self, reason):
+        self.cookies['iCookies'] = {}
+        MSNEventBase.connectionLost(self, reason)
+
+    def _sendInit(self):
+        """
+        send initial data based on whether we are replying to an invitation
+        or starting one.
+        """
+        id = self._nextTransactionID()
+        if not self.reply:
+            self.sendLine("USR %s %s %s" % (id, self.userHandle, self.key))
+        else:
+            self.sendLine("ANS %s %s %s %s" % (id, self.userHandle, self.key, self.sessionID))
+
+    def _newInvitationCookie(self):
+        self._iCookie += 1
+        if self._iCookie > 1000: self._iCookie = 1
+        return self._iCookie
+
+    def _checkTyping(self, message, cTypes):
+        """ helper method for checkMessage """
+        if 'text/x-msmsgscontrol' in cTypes and message.hasHeader('TypingUser'):
+            self.gotContactTyping(message)
+            return 1
+
+    def _checkFileInvitation(self, message, info):
+        """ helper method for checkMessage """
+        if not info.get('Application-GUID', '').upper() == MSN_MSNFTP_GUID: return 0
+        try:
+            cookie = info['Invitation-Cookie']
+            filename = info['Application-File']
+            filesize = int(info['Application-FileSize'])
+            connectivity = (info.get('Connectivity', 'n').lower() == 'y')
+        except KeyError:
+            log.msg('Received munged file transfer request ... ignoring.')
+            return 0
+        raise NotImplementedError
+        self.gotSendRequest(msnft.MSNFTP_Receive(filename, filesize, message.userHandle, cookie, connectivity, self))
+        return 1
+
+    def _handleP2PMessage(self, message):
+        """ helper method for msnslp messages (file transfer & avatars) """
+        if not message.getHeader("P2P-Dest") == self.userHandle: return
+        packet = message.message
+        binaryFields = BinaryFields(packet=packet)
+        if binaryFields[5] == BinaryFields.BYEGOT:
+            pass # Ignore the ACKs to SLP messages
+        elif binaryFields[0] != 0:
+            slpLink = self.slpLinks.get(binaryFields[0])
+            if not slpLink:
+                # Link has been killed. Ignore
+                return
+            if slpLink.remoteUser == message.userHandle:
+                slpLink.handlePacket(packet)
+        elif binaryFields[5] == BinaryFields.ACK:
+            pass # Ignore the ACKs to SLP messages
+        else:
+            slpMessage = MSNSLPMessage(packet)
+            slpLink = None
+            # Always try and give a slpMessage to a slpLink first.
+            # If none can be found, and it was INVITE, then create
+            # one to handle the session.
+            for slpLink in self.slpLinks.values():
+                if slpLink.sessionGuid == slpMessage.sessionGuid:
+                    slpLink.handleSLPMessage(slpMessage)
+                    break
+            else:
+                slpLink = None # Was not handled
+
+            if not slpLink and slpMessage.method == "INVITE":
+                if slpMessage.euf_guid == MSN_MSNFTP_GUID:
+                    context = FileContext(slpMessage.context)
+                    slpLink = SLPLink_FileReceive(remoteUser=slpMessage.fro, switchboard=self, filename=context.filename, filesize=context.filesize, sessionID=slpMessage.sessionID, sessionGuid=slpMessage.sessionGuid, branch=slpMessage.branch)
+                    self.slpLinks[slpMessage.sessionID] = slpLink
+                    self.gotFileReceive(slpLink)
+                elif slpMessage.euf_guid == MSN_AVATAR_GUID:
+                    # Check that we have an avatar to send
+                    if self.msnobj:
+                        slpLink = SLPLink_AvatarSend(remoteUser=slpMessage.fro, switchboard=self, filesize=self.msnobj.size, sessionID=slpMessage.sessionID, sessionGuid=slpMessage.sessionGuid)
+                        slpLink.write(self.msnobj.imageData)
+                        slpLink.close()
+                    else:
+                        # They shouldn't have sent a request if we have
+                        # no avatar. So we'll just ignore them.
+                        # FIXME We should really send an error
+                        pass
+                if slpLink:
+                    self.slpLinks[slpMessage.sessionID] = slpLink
+            if slpLink:
+                # Always need to ACK these packets if we can
+                slpLink.sendP2PACK(binaryFields)
+
+
+    def checkMessage(self, message):
+        """
+        hook for detecting any notification type messages
+        (e.g. file transfer)
+        """
+        cTypes = [s.lstrip() for s in message.getHeader('Content-Type').split(';')]
+        if self._checkTyping(message, cTypes): return 0
+#        if 'text/x-msmsgsinvite' in cTypes:
+            # header like info is sent as part of the message body.
+#            info = {}
+#            for line in message.message.split('\r\n'):
+#                try:
+#                    key, val = line.split(':')
+#                    info[key] = val.lstrip()
+#                except ValueError: continue
+#            if self._checkFileInvitation(message, info): return 0
+        elif 'application/x-msnmsgrp2p' in cTypes:
+            self._handleP2PMessage(message)
+            return 0
+        return 1
+
+    # negotiation
+    def handle_USR(self, params):
+        checkParamLen(len(params), 4, 'USR')
+        if params[1] == "OK":
+            self.loggedIn()
+
+    # invite a user
+    def handle_CAL(self, params):
+        checkParamLen(len(params), 3, 'CAL')
+        id = int(params[0])
+        if params[1].upper() == "RINGING":
+            self._fireCallback(id, int(params[2])) # session ID as parameter
+
+    # user joined
+    def handle_JOI(self, params):
+        checkParamLen(len(params), 2, 'JOI')
+        self.userJoined(params[0], unquote(params[1]))
+
+    # users participating in the current chat
+    def handle_IRO(self, params):
+        checkParamLen(len(params), 5, 'IRO')
+        self.pendingUsers[params[3]] = unquote(params[4])
+        if params[1] == params[2]:
+            self.gotChattingUsers(self.pendingUsers)
+            self.pendingUsers = {}
+
+    # finished listing users
+    def handle_ANS(self, params):
+        checkParamLen(len(params), 2, 'ANS')
+        if params[1] == "OK":
+            self.loggedIn()
+
+    def handle_ACK(self, params):
+        checkParamLen(len(params), 1, 'ACK')
+        self._fireCallback(int(params[0]), None)
+
+    def handle_NAK(self, params):
+        checkParamLen(len(params), 1, 'NAK')
+        self._fireCallback(int(params[0]), None)
+
+    def handle_BYE(self, params):
+        #checkParamLen(len(params), 1, 'BYE') # i've seen more than 1 param passed to this
+        self.userLeft(params[0])
+
+    # callbacks
+
+    def loggedIn(self):
+        """
+        called when all login details have been negotiated.
+        Messages can now be sent, or new users invited.
+        """
+        pass
+
+    def gotChattingUsers(self, users):
+        """
+        called after connecting to an existing chat session.
+
+        @param users: A dict mapping user handles to screen names
+                      (current users taking part in the conversation)
+        """
+        pass
+
+    def userJoined(self, userHandle, screenName):
+        """
+        called when a user has joined the conversation.
+
+        @param userHandle: the user handle (passport) of the user
+        @param screenName: the screen name of the user
+        """
+        pass
+
+    def userLeft(self, userHandle):
+        """
+        called when a user has left the conversation.
+
+        @param userHandle: the user handle (passport) of the user.
+        """
+        pass
+
+    def gotMessage(self, message):
+        """
+        called when we receive a message.
+
+        @param message: the associated MSNMessage object
+        """
+        pass
+
+    def gotFileReceive(self, fileReceive):
+        """
+        called when we receive a file send request from a contact.
+        Default action is to reject the file.
+
+        @param fileReceive: msnft.MSNFTReceive_Base instance
+        """
+        fileReceive.reject()
+
+
+    def gotSendRequest(self, fileReceive):
+        """
+        called when we receive a file send request from a contact
+
+        @param fileReceive: msnft.MSNFTReceive_Base instance
+        """
+        pass
+
+    def gotContactTyping(self, message):
+        """
+        called when we receive the special type of message notifying
+        us that a contact is typing a message.
+
+        @param message: the associated MSNMessage object
+        """
+        pass
+
+    # api calls
+
+    def inviteUser(self, userHandle):
+        """
+        used to invite a user to the current switchboard server.
+
+        @param userHandle: the user handle (passport) of the desired user.
+
+        @return: A Deferred, the callback for which will be called
+                 when the server notifies us that the user has indeed
+                 been invited.  The callback argument will be a tuple
+                 with 1 element, the sessionID given to the invited user.
+                 I'm not sure if this is useful or not.
+        """
+
+        id, d = self._createIDMapping()
+        self.sendLine("CAL %s %s" % (id, userHandle))
+        return d
+
+    def sendMessage(self, message):
+        """
+        used to send a message.
+
+        @param message: the corresponding MSNMessage object.
+
+        @return: Depending on the value of message.ack.
+                 If set to MSNMessage.MESSAGE_ACK or
+                 MSNMessage.MESSAGE_NACK a Deferred will be returned,
+                 the callback for which will be fired when an ACK or
+                 NACK is received - the callback argument will be
+                 (None,). If set to MSNMessage.MESSAGE_ACK_NONE then
+                 the return value is None.
+        """
+
+        if message.ack not in ('A','N','D'): id, d = self._nextTransactionID(), None
+        else: id, d = self._createIDMapping()
+        if message.length == 0: message.length = message._calcMessageLen()
+        self.sendLine("MSG %s %s %s" % (id, message.ack, message.length))
+        # Apparently order matters with these
+        orderMatters = ("MIME-Version", "Content-Type", "Message-ID")
+        for header in orderMatters:
+            if message.hasHeader(header):
+                self.sendLine("%s: %s" % (header, message.getHeader(header)))
+        # send the rest of the headers
+        for header in [h for h in message.headers.items() if h[0] not in orderMatters]:
+            self.sendLine("%s: %s" % (header[0], header[1]))
+        self.transport.write("\r\n")
+        self.transport.write(message.message)
+        if MESSAGEDEBUG: log.msg(message.message)
+        return d
+
+    def sendAvatarRequest(self, msnContact):
+        """
+        used to request an avatar from a user in this switchboard
+        session.
+
+        @param msnContact: the msnContact object to request an avatar for
+
+        @return: A Deferred, the callback for which will be called
+                 when the avatar transfer succeeds.
+                 The callback argument will be a tuple with one element,
+                 the PNG avatar data.
+        """
+        if not msnContact.msnobj: return
+        d = Deferred()
+        def bufferClosed(data):
+            d.callback((data,))
+        buffer = StringBuffer(bufferClosed)
+        buffer.error = lambda: None
+        slpLink = SLPLink_AvatarReceive(remoteUser=msnContact.userHandle, switchboard=self, consumer=buffer, context=msnContact.msnobj.text)
+        self.slpLinks[slpLink.sessionID] = slpLink
+        return d
+
+    def sendFile(self, msnContact, filename, filesize):
+        """
+        used to send a file to a contact.
+
+        @param msnContact: the MSNContact object to send a file to.
+        @param filename: the name of the file to send.
+        @param filesize: the size of the file to send.
+        
+        @return: (fileSend, d) A FileSend object and a Deferred.
+                 The Deferred will pass one argument in a tuple,
+                 whether or not the transfer is accepted. If you
+                 receive a True, then you can call write() on the
+                 fileSend object to send your file. Call close()
+                 when the file is done.
+                 NOTE: You MUST write() exactly as much as you
+                 declare in filesize.
+        """
+        if not msnContact.userHandle: return
+        # FIXME, check msnContact.caps to see if we should use old-style
+        fileSend = SLPLink_FileSend(remoteUser=msnContact.userHandle, switchboard=self, filename=filename, filesize=filesize)
+        self.slpLinks[fileSend.sessionID] = fileSend
+        return fileSend, fileSend.acceptDeferred
+
+    def sendTypingNotification(self):
+        """
+        Used to send a typing notification. Upon receiving this
+        message the official client will display a 'user is typing'
+        message to all other users in the chat session for 10 seconds.
+        You should send one of these every 5 seconds as long as the
+        user is typing.
+        """
+        m = MSNMessage()
+        m.ack = m.MESSAGE_ACK_NONE
+        m.setHeader('Content-Type', 'text/x-msmsgscontrol')
+        m.setHeader('TypingUser', self.userHandle)
+        m.message = "\r\n"
+        self.sendMessage(m)
+
+    def sendFileInvitation(self, fileName, fileSize):
+        """
+        send an notification that we want to send a file.
+
+        @param fileName: the file name
+        @param fileSize: the file size
+
+        @return: A Deferred, the callback of which will be fired
+                 when the user responds to this invitation with an
+                 appropriate message. The callback argument will be
+                 a tuple with 3 elements, the first being 1 or 0
+                 depending on whether they accepted the transfer
+                 (1=yes, 0=no), the second being an invitation cookie
+                 to identify your follow-up responses and the third being
+                 the message 'info' which is a dict of information they
+                 sent in their reply (this doesn't really need to be used).
+                 If you wish to proceed with the transfer see the
+                 sendTransferInfo method.
+        """
+        cookie = self._newInvitationCookie()
+        d = Deferred()
+        m = MSNMessage()
+        m.setHeader('Content-Type', 'text/x-msmsgsinvite; charset=UTF-8')
+        m.message += 'Application-Name: File Transfer\r\n'
+        m.message += 'Application-GUID: %s\r\n' % MSN_MSNFTP_GUID
+        m.message += 'Invitation-Command: INVITE\r\n'
+        m.message += 'Invitation-Cookie: %s\r\n' % str(cookie)
+        m.message += 'Application-File: %s\r\n' % fileName
+        m.message += 'Application-FileSize: %s\r\n\r\n' % str(fileSize)
+        m.ack = m.MESSAGE_ACK_NONE
+        self.sendMessage(m)
+        self.cookies['iCookies'][cookie] = (d, m)
+        return d
+
+    def sendTransferInfo(self, accept, iCookie, authCookie, ip, port):
+        """
+        send information relating to a file transfer session.
+
+        @param accept: whether or not to go ahead with the transfer
+                       (1=yes, 0=no)
+        @param iCookie: the invitation cookie of previous replies
+                        relating to this transfer
+        @param authCookie: the authentication cookie obtained from
+                           an FileSend instance
+        @param ip: your ip
+        @param port: the port on which an FileSend protocol is listening.
+        """
+        m = MSNMessage()
+        m.setHeader('Content-Type', 'text/x-msmsgsinvite; charset=UTF-8')
+        m.message += 'Invitation-Command: %s\r\n' % (accept and 'ACCEPT' or 'CANCEL')
+        m.message += 'Invitation-Cookie: %s\r\n' % iCookie
+        m.message += 'IP-Address: %s\r\n' % ip
+        m.message += 'Port: %s\r\n' % port
+        m.message += 'AuthCookie: %s\r\n' % authCookie
+        m.message += '\r\n'
+        m.ack = m.MESSAGE_NACK
+        self.sendMessage(m)
+
+
+class FileReceive:
+    def __init__(self, filename, filesize, userHandle):
+        self.consumer = None
+        self.finished = False
+        self.error = False
+        self.buffer = []
+        self.filename, self.filesize, self.userHandle = filename, filesize, userHandle
+
+    def reject(self):
+        raise NotImplementedError
+
+    def accept(self, consumer):
+        if self.consumer: raise "AlreadyAccepted"
+        self.consumer = consumer
+        for data in self.buffer:
+            self.consumer.write(data)
+        self.buffer = None
+        if self.finished:
+            self.consumer.close()
+        if self.error:
+            self.consumer.error()
+
+    def write(self, data):
+        if self.error or self.finished:
+            raise IOError, "Attempt to write in an invalid state"
+        if self.consumer:
+            self.consumer.write(data)
+        else:
+            self.buffer.append(data)
+
+    def close(self):
+        self.finished = True
+        if self.consumer:
+            self.consumer.close()
+
+class FileContext:
+    """ Represents the Context field for P2P file transfers """
+    def __init__(self, data=""):
+        if data:
+            self.parse(data)
+        else:
+            self.filename = ""
+            self.filesize = 0
+
+    def pack(self):
+        if MSNP2PDEBUG: log.msg("FileContext packing:", self.filename, self.filesize)
+        data = struct.pack("<LLQL", 638, 0x03, self.filesize, 0x01)
+        data = data[:-1] # Uck, weird, but it works
+        data += utf16net(self.filename)
+        data = ljust(data, 570, '\0')
+        data += struct.pack("<L", 0xFFFFFFFFL)
+        data = ljust(data, 638, '\0')
+        return data
+
+    def parse(self, packet):
+        self.filesize = struct.unpack("<Q", packet[8:16])[0]
+        chunk = packet[19:540]
+        chunk = chunk[:chunk.find('\x00\x00')]
+        self.filename = unicode((codecs.BOM_UTF16_BE + chunk).decode("utf-16"))
+        if MSNP2PDEBUG: log.msg("FileContext parsed:", self.filesize, self.filename)
+
+
+class BinaryFields:
+    """ Utility class for the binary header & footer in p2p messages """
+    ACK = 0x02
+    WAIT = 0x04
+    ERR = 0x08
+    DATA = 0x20
+    BYEGOT = 0x40
+    BYESENT = 0x80
+    DATAFT = 0x1000030
+
+    def __init__(self, fields=None, packet=None):
+        if fields:
+            self.fields = fields
+        else:
+            self.fields = [0] * 10
+            if packet:
+                self.unpackFields(packet)
+    
+    def __getitem__(self, key):
+        return self.fields[key]
+    
+    def __setitem__(self, key, value):
+        self.fields[key] = value
+    
+    def unpackFields(self, packet):
+        self.fields = struct.unpack("<LLQQLLLLQ", packet[0:48])
+        self.fields += struct.unpack(">L", packet[len(packet)-4:])
+        if MSNP2PDEBUG:
+            out = "Unpacked fields: "
+            for i in self.fields:
+                out += hex(i) + ' '
+            log.msg(out)
+    
+    def packHeaders(self):
+        f = tuple(self.fields)
+        if MSNP2PDEBUG:
+            out = "Packed fields: "
+            for i in self.fields:
+                out += hex(i) + ' '
+            log.msg(out)
+        return struct.pack("<LLQQLLLLQ", f[0], f[1], f[2], f[3], f[4], f[5], f[6], f[7], f[8])
+    
+    def packFooter(self):
+        return struct.pack(">L", self.fields[9])
+    
+
+class MSNSLPMessage:
+    """ Representation of a single MSNSLP message """
+    def __init__(self, packet=None):
+        self.method = ""
+        self.status = ""
+        self.to = ""
+        self.fro = ""
+        self.branch = ""
+        self.cseq = 0
+        self.sessionGuid = ""
+        self.sessionID = None
+        self.euf_guid = ""
+        self.data = "\r\n" + chr(0)
+        if packet:
+            self.parse(packet)
+
+    def create(self, method=None, status=None, to=None, fro=None, branch=None, cseq=0, sessionGuid=None, data=None):
+        self.method = method
+        self.status = status
+        self.to = to
+        self.fro = fro
+        self.branch = branch
+        self.cseq = cseq
+        self.sessionGuid = sessionGuid
+        if data: self.data = data
+    
+    def setData(self, ctype, data):
+        self.ctype = ctype
+        s = []
+        order = ["EUF-GUID", "SessionID", "AppID", "Context", "Bridge", "Listening","Bridges", "NetID", "Conn-Type", "UPnPNat", "ICF", "Hashed-Nonce"]
+        for key in order:
+            if key == "Context" and data.has_key(key):
+                s.append("Context: %s\r\n" % b64enc(data[key]))
+            elif data.has_key(key):
+                s.append("%s: %s\r\n" % (key, str(data[key])))
+        s.append("\r\n"+chr(0))
+        
+        self.data = "".join(s)
+    
+    def parse(self, s):
+        s = s[48:len(s)-4:]
+        if s.find("MSNSLP/1.0") < 0: return
+
+        lines = s.split("\r\n")
+        
+        # Get the MSNSLP method or status
+        msnslp = lines[0].split(" ")
+        if MSNP2PDEBUG: log.msg("Parsing MSNSLPMessage %s %s" % (len(s), s))
+        if msnslp[0] in ("INVITE", "BYE"):
+            self.method = msnslp[0].strip()
+        else:
+            self.status = msnslp[1].strip()
+
+        lines.remove(lines[0])
+        
+        for line in lines:
+            line = line.split(":")
+            if len(line) < 1: continue
+            try:
+                if len(line) > 2 and line[0] == "To":
+                    self.to = line[2][:line[2].find('>')]
+                elif len(line) > 2 and line[0] == "From":
+                    self.fro = line[2][:line[2].find('>')]
+                elif line[0] == "Call-ID":
+                    self.sessionGuid = line[1].strip()
+                elif line[0] == "CSeq":
+                    self.cseq = int(line[1].strip())
+                elif line[0] == "SessionID":
+                    self.sessionID = int(line[1].strip())
+                elif line[0] == "EUF-GUID":
+                    self.euf_guid = line[1].strip()
+                elif line[0] == "Content-Type":
+                    self.ctype = line[1].strip()
+                elif line[0] == "Context":
+                    self.context = b64dec(line[1])
+                elif line[0] == "Via":
+                    self.branch = line[1].split(";")[1].split("=")[1].strip()
+            except:
+                if MSNP2PDEBUG:
+                    log.msg("Error parsing MSNSLP message.")
+                    raise
+
+    def __str__(self):
+        s = []
+        if self.method:
+           s.append("%s MSNMSGR:%s MSNSLP/1.0\r\n" % (self.method, self.to))
+        else:
+            if   self.status == "200": status = "200 OK"
+            elif self.status == "603": status = "603 Decline"
+            s.append("MSNSLP/1.0 %s\r\n" % status)
+        s.append("To: <msnmsgr:%s>\r\n" % self.to)
+        s.append("From: <msnmsgr:%s>\r\n" % self.fro)
+        s.append("Via: MSNSLP/1.0/TLP ;branch=%s\r\n" % self.branch)
+        s.append("CSeq: %s \r\n" % str(self.cseq))
+        s.append("Call-ID: %s\r\n" % self.sessionGuid)
+        s.append("Max-Forwards: 0\r\n")
+        s.append("Content-Type: %s\r\n" % self.ctype)
+        s.append("Content-Length: %s\r\n\r\n" % len(self.data))
+        s.append(self.data)
+        return "".join(s)
+
+class SeqID:
+    """ Utility for handling the weird sequence IDs in p2p messages """
+    def __init__(self, baseID=None):
+        if baseID:
+            self.baseID = baseID
+        else:
+            self.baseID = random.randint(1000, sys.maxint)
+        self.pos = -1
+
+    def get(self):
+        return p2pseq(self.pos) + self.baseID
+    
+    def next(self):
+        self.pos += 1
+        return self.get()
+    
+
+class StringBuffer(StringIO.StringIO):
+    def __init__(self, notifyFunc=None):
+        self.notifyFunc = notifyFunc
+        StringIO.StringIO.__init__(self)
+
+    def close(self):
+        if self.notifyFunc:
+            self.notifyFunc(self.getvalue())
+            self.notifyFunc = None
+        StringIO.StringIO.close(self)
+
+
+class SLPLink:
+    def __init__(self, remoteUser, switchboard, sessionID, sessionGuid):
+        self.dataFlag = 0
+        if not sessionID:
+            sessionID = random.randint(1000, sys.maxint)
+        if not sessionGuid:
+            sessionGuid = random_guid()
+        self.remoteUser = remoteUser
+        self.switchboard = switchboard
+        self.sessionID = sessionID
+        self.sessionGuid = sessionGuid
+        self.seqID = SeqID()
+
+    def killLink(self):
+        if MSNP2PDEBUG: log.msg("killLink")
+        def kill():
+            if MSNP2PDEBUG: log.msg("killLink - kill()")
+            if not self.switchboard: return
+            del self.switchboard.slpLinks[self.sessionID]
+            self.switchboard = None
+        # This is so that handleP2PMessage can still use the SLPLink
+        # one last time, for ACKing BYEs and 601s.
+        reactor.callLater(0, kill)
+
+    def warn(self, text):
+        log.msg("Warning in transfer: %s %s" % (self, text))
+
+    def sendP2PACK(self, ackHeaders):
+        binaryFields = BinaryFields()
+        binaryFields[0] = ackHeaders[0]
+        binaryFields[1] = self.seqID.next()
+        binaryFields[3] = ackHeaders[3]
+        binaryFields[5] = BinaryFields.ACK
+        binaryFields[6] = ackHeaders[1]
+        binaryFields[7] = ackHeaders[6]
+        binaryFields[8] = ackHeaders[3]
+        self.sendP2PMessage(binaryFields, "")
+
+    def sendSLPMessage(self, cmd, ctype, data, branch=None):
+        msg = MSNSLPMessage()
+        if cmd.isdigit():
+            msg.create(status=cmd, to=self.remoteUser, fro=self.switchboard.userHandle, branch=branch, cseq=1, sessionGuid=self.sessionGuid)
+        else:
+            msg.create(method=cmd, to=self.remoteUser, fro=self.switchboard.userHandle, branch=random_guid(), cseq=0, sessionGuid=self.sessionGuid)
+        msg.setData(ctype, data)
+        msgStr = str(msg)
+        binaryFields = BinaryFields()
+        binaryFields[1] = self.seqID.next()
+        binaryFields[3] = len(msgStr)
+        binaryFields[4] = binaryFields[3]
+        binaryFields[6] = random.randint(1000, sys.maxint)
+        self.sendP2PMessage(binaryFields, msgStr)
+
+    def sendP2PMessage(self, binaryFields, msgStr):
+        packet = binaryFields.packHeaders() + msgStr + binaryFields.packFooter()
+
+        message = MSNMessage(message=packet)
+        message.setHeader("Content-Type", "application/x-msnmsgrp2p")
+        message.setHeader("P2P-Dest", self.remoteUser)
+        message.ack = MSNMessage.MESSAGE_ACK_FAT
+        self.switchboard.sendMessage(message)
+
+    def handleSLPMessage(self, slpMessage):
+        raise NotImplementedError
+
+
+
+    
+
+class SLPLink_Send(SLPLink):
+    def __init__(self, remoteUser, switchboard, filesize, sessionID=None, sessionGuid=None):
+        SLPLink.__init__(self, remoteUser, switchboard, sessionID, sessionGuid)
+        self.handlePacket = None
+        self.offset = 0
+        self.filesize = filesize
+        self.data = ""
+    
+    def send_dataprep(self):
+        if MSNP2PDEBUG: log.msg("send_dataprep")
+        binaryFields = BinaryFields()
+        binaryFields[0] = self.sessionID
+        binaryFields[1] = self.seqID.next()
+        binaryFields[3] = 4
+        binaryFields[4] = 4
+        binaryFields[6] = random.randint(1000, sys.maxint)
+        binaryFields[9] = 1
+        self.sendP2PMessage(binaryFields, chr(0) * 4)
+
+    def write(self, data):
+        if MSNP2PDEBUG: log.msg("write")
+        i = 0
+        data = self.data + data
+        self.data = ""
+        length = len(data)
+        while i < length:
+            if i + 1202 < length:
+                self._writeChunk(data[i:i+1202])
+                i += 1202
+            else:
+                self.data = data[i:]
+                return
+
+    def _writeChunk(self, chunk):
+        if MSNP2PDEBUG: log.msg("writing chunk")
+        binaryFields = BinaryFields()
+        binaryFields[0] = self.sessionID
+        if self.offset == 0:
+            binaryFields[1] = self.seqID.next()
+        else:
+            binaryFields[1] = self.seqID.get()
+        binaryFields[2] = self.offset
+        binaryFields[3] = self.filesize
+        binaryFields[4] = len(chunk)
+        binaryFields[5] = self.dataFlag
+        binaryFields[6] = random.randint(1000, sys.maxint)
+        binaryFields[9] = 1
+        self.offset += len(chunk)
+        self.sendP2PMessage(binaryFields, chunk)
+    
+    def close(self):
+        if self.data:
+            self._writeChunk(self.data)
+        #self.killLink()
+    
+    def error(self):
+        pass
+        # FIXME, should send 601 or something
+
+class SLPLink_FileSend(SLPLink_Send):
+    def __init__(self, remoteUser, switchboard, filename, filesize):
+        SLPLink_Send.__init__(self, remoteUser=remoteUser, switchboard=switchboard, filesize=filesize)
+        self.dataFlag = BinaryFields.DATAFT
+        # Send invite & wait for 200OK before sending dataprep
+        context = FileContext()
+        context.filename = filename
+        context.filesize = filesize
+        data = {"EUF-GUID" : MSN_MSNFTP_GUID,\
+                "SessionID": self.sessionID,\
+                "AppID"    : 2,\
+                "Context"  : context.pack() }
+        self.sendSLPMessage("INVITE", "application/x-msnmsgr-sessionreqbody", data)
+        self.acceptDeferred = Deferred()
+
+    def handleSLPMessage(self, slpMessage):
+        if slpMessage.status == "200":
+            if slpMessage.ctype == "application/x-msnmsgr-sessionreqbody":
+                data = {"Bridges"     : "TRUDPv1 TCPv1",\
+                        "NetID"       : "0",\
+                        "Conn-Type"   : "Firewall",\
+                        "UPnPNat"     : "false",\
+                        "ICF"         : "true",}
+                        #"Hashed-Nonce": random_guid()}
+                self.sendSLPMessage("INVITE", "application/x-msnmsgr-transreqbody", data)
+            elif slpMessage.ctype == "application/x-msnmsgr-transrespbody":
+                self.acceptDeferred.callback((True,))
+                self.handlePacket = self.wait_data_ack
+        else:
+            if slpMessage.status == "603":
+                self.acceptDeferred.callback((False,))
+            if MSNP2PDEBUG: log.msg("SLPLink is over due to decline, error or BYE")
+            self.data = ""
+            self.killLink()
+
+    def wait_data_ack(self, packet):
+        if MSNP2PDEBUG: log.msg("wait_data_ack")
+        binaryFields = BinaryFields()
+        binaryFields.unpackFields(packet)
+
+        if binaryFields[5] != BinaryFields.ACK:
+            self.warn("field5," + str(binaryFields[5]))
+            return
+
+        self.sendSLPMessage("BYE", "application/x-msnmsgr-sessionclosebody", {})
+        self.handlePacket = None
+
+    def close(self):
+        self.handlePacket = self.wait_data_ack
+        SLPLink_Send.close(self)
+
+
+class SLPLink_AvatarSend(SLPLink_Send):
+    def __init__(self, remoteUser, switchboard, filesize, sessionID=None, sessionGuid=None):
+        SLPLink_Send.__init__(self, remoteUser=remoteUser, switchboard=switchboard, filesize=filesize, sessionID=sessionID, sessionGuid=sessionGuid)
+        self.dataFlag = BinaryFields.DATA
+        self.sendSLPMessage("200", "application/x-msnmsgr-sessionreqbody", {"SessionID":self.sessionID})
+        self.send_dataprep()
+        self.handlePacket = lambda packet: None
+
+    def handleSLPMessage(self, slpMessage):
+        if MSNP2PDEBUG: log.msg("BYE or error")
+        self.killLink()
+
+    def close(self):
+        SLPLink_Send.close(self)
+        # Keep the link open to wait for a BYE
+
+class SLPLink_Receive(SLPLink):
+    def __init__(self, remoteUser, switchboard, consumer, context=None, sessionID=None, sessionGuid=None):
+        SLPLink.__init__(self, remoteUser, switchboard, sessionID, sessionGuid)
+        self.handlePacket = None
+        self.consumer = consumer
+        self.pos = 0
+
+    def wait_dataprep(self, packet):
+        if MSNP2PDEBUG: log.msg("wait_dataprep")
+        binaryFields = BinaryFields()
+        binaryFields.unpackFields(packet)
+
+        if binaryFields[3] != 4:
+            self.warn("field3," + str(binaryFields[3]))
+            return
+        if binaryFields[4] != 4:
+            self.warn("field4," + str(binaryFields[4]))
+            return
+        # Just ignore the footer
+        #if binaryFields[9] != 1:
+        #    self.warn("field9," + str(binaryFields[9]))
+        #   return
+
+        self.sendP2PACK(binaryFields)
+        self.handlePacket = self.wait_data
+
+    def wait_data(self, packet):
+        if MSNP2PDEBUG: log.msg("wait_data")
+        binaryFields = BinaryFields()
+        binaryFields.unpackFields(packet)
+
+        if binaryFields[5] != self.dataFlag:
+            self.warn("field5," + str(binaryFields[5]))
+            return
+        # Just ignore the footer
+        #if binaryFields[9] != 1:
+        #    self.warn("field9," + str(binaryFields[9]))
+        #   return
+        offset = binaryFields[2]
+        total = binaryFields[3]
+        length = binaryFields[4]
+
+        data = packet[48:-4]
+        if offset != self.pos:
+            self.warn("Received packet out of order")
+            self.consumer.error()
+            return
+        if len(data) != length:
+            self.warn("Received bad length of slp")
+            self.consumer.error()
+            return
+        
+        self.pos += length
+
+        self.consumer.write(str(data))
+
+        if self.pos == total:
+            self.sendP2PACK(binaryFields)
+            self.consumer.close()
+            self.handlePacket = None
+            self.doFinished()
+
+    def doFinished(self):
+        raise NotImplementedError
+
+
+class SLPLink_FileReceive(SLPLink_Receive, FileReceive):
+    def __init__(self, remoteUser, switchboard, filename, filesize, sessionID, sessionGuid, branch):
+        SLPLink_Receive.__init__(self, remoteUser=remoteUser, switchboard=switchboard, consumer=self, sessionID=sessionID, sessionGuid=sessionGuid)
+        self.dataFlag = BinaryFields.DATAFT
+        self.initialBranch = branch
+        FileReceive.__init__(self, filename, filesize, remoteUser)
+
+    def reject(self):
+        # Send a 603 decline
+        if not self.switchboard: return
+        self.sendSLPMessage("603", "application/x-msnmsgr-sessionreqbody", {"SessionID":self.sessionID}, branch=self.initialBranch)
+        self.killLink()
+
+    def accept(self, consumer):
+        FileReceive.accept(self, consumer)
+        if not self.switchboard: return
+        self.sendSLPMessage("200", "application/x-msnmsgr-sessionreqbody", {"SessionID":self.sessionID}, branch=self.initialBranch)
+        self.handlePacket = self.wait_data # Moved here because sometimes the second INVITE seems to be skipped
+
+    def handleSLPMessage(self, slpMessage):
+        if slpMessage.method == "INVITE": # The second invite
+            data = {"Bridge"      : "TCPv1",\
+                    "Listening"   : "false",\
+                    "Hashed-Nonce": "{00000000-0000-0000-0000-000000000000}"}
+            self.sendSLPMessage("200", "application/x-msnmsgr-transrespbody", data, branch=slpMessage.branch)
+#            self.handlePacket = self.wait_data # Moved up
+        else:
+            if MSNP2PDEBUG: log.msg("It's either a BYE or an error")
+            self.killLink()
+            # FIXME, do some error handling if it was an error
+
+    def doFinished(self):
+        #self.sendSLPMessage("BYE", "application/x-msnmsgr-sessionclosebody", {})
+        #self.killLink()
+        # Wait for BYE? #FIXME
+        pass
+
+class SLPLink_AvatarReceive(SLPLink_Receive):
+    def __init__(self, remoteUser, switchboard, consumer, context):
+        SLPLink_Receive.__init__(self, remoteUser=remoteUser, switchboard=switchboard, consumer=consumer, context=context)
+        self.dataFlag = BinaryFields.DATA
+        data = {"EUF-GUID" : MSN_AVATAR_GUID,\
+                "SessionID": self.sessionID,\
+                "AppID"    : 1,\
+                "Context"  : context}
+        self.sendSLPMessage("INVITE", "application/x-msnmsgr-sessionreqbody", data)
+        self.handlePacket = self.wait_dataprep
+
+    def handleSLPMessage(self, slpMessage):
+        if slpMessage.method == "INVITE": # The second invite
+            data = {"Bridge"      : "TCPv1",\
+                    "Listening"   : "false",\
+                    "Hashed-Nonce": "{00000000-0000-0000-0000-000000000000}"}
+            self.sendSLPMessage("200", "application/x-msnmsgr-transrespbody", data, branch=slpMessage.branch)
+        elif slpMessage.status == "200":
+            pass
+            #self.handlePacket = self.wait_dataprep # Moved upwards
+        else:
+            if MSNP2PDEBUG: log.msg("SLPLink is over due to error or BYE")
+            self.killLink()
+
+    def doFinished(self):
+        self.sendSLPMessage("BYE", "application/x-msnmsgr-sessionclosebody", {})
+
+# mapping of error codes to error messages
+errorCodes = {
+
+    200 : "Syntax error",
+    201 : "Invalid parameter",
+    205 : "Invalid user",
+    206 : "Domain name missing",
+    207 : "Already logged in",
+    208 : "Invalid username",
+    209 : "Invalid screen name",
+    210 : "User list full",
+    215 : "User already there",
+    216 : "User already on list",
+    217 : "User not online",
+    218 : "Already in mode",
+    219 : "User is in the opposite list",
+    223 : "Too many groups",
+    224 : "Invalid group",
+    225 : "User not in group",
+    229 : "Group name too long",
+    230 : "Cannot remove group 0",
+    231 : "Invalid group",
+    280 : "Switchboard failed",
+    281 : "Transfer to switchboard failed",
+
+    300 : "Required field missing",
+    301 : "Too many FND responses",
+    302 : "Not logged in",
+
+    400 : "Message not allowed",
+    402 : "Error accessing contact list",
+    403 : "Error accessing contact list",
+
+    500 : "Internal server error",
+    501 : "Database server error",
+    502 : "Command disabled",
+    510 : "File operation failed",
+    520 : "Memory allocation failed",
+    540 : "Wrong CHL value sent to server",
+
+    600 : "Server is busy",
+    601 : "Server is unavaliable",
+    602 : "Peer nameserver is down",
+    603 : "Database connection failed",
+    604 : "Server is going down",
+    605 : "Server unavailable",
+
+    707 : "Could not create connection",
+    710 : "Invalid CVR parameters",
+    711 : "Write is blocking",
+    712 : "Session is overloaded",
+    713 : "Too many active users",
+    714 : "Too many sessions",
+    715 : "Not expected",
+    717 : "Bad friend file",
+    731 : "Not expected",
+
+    800 : "Requests too rapid",
+
+    910 : "Server too busy",
+    911 : "Authentication failed",
+    912 : "Server too busy",
+    913 : "Not allowed when offline",
+    914 : "Server too busy",
+    915 : "Server too busy",
+    916 : "Server too busy",
+    917 : "Server too busy",
+    918 : "Server too busy",
+    919 : "Server too busy",
+    920 : "Not accepting new users",
+    921 : "Server too busy",
+    922 : "Server too busy",
+    923 : "No parent consent",
+    924 : "Passport account not yet verified"
+
+}
+
+# mapping of status codes to readable status format
+statusCodes = {
+
+    STATUS_ONLINE  : "Online",
+    STATUS_OFFLINE : "Offline",
+    STATUS_HIDDEN  : "Appear Offline",
+    STATUS_IDLE    : "Idle",
+    STATUS_AWAY    : "Away",
+    STATUS_BUSY    : "Busy",
+    STATUS_BRB     : "Be Right Back",
+    STATUS_PHONE   : "On the Phone",
+    STATUS_LUNCH   : "Out to Lunch"
+
+}
+
+# mapping of list ids to list codes
+listIDToCode = {
+
+    FORWARD_LIST : 'fl',
+    BLOCK_LIST   : 'bl',
+    ALLOW_LIST   : 'al',
+    REVERSE_LIST : 'rl',
+    PENDING_LIST : 'pl'
+
+}
+
+# mapping of list codes to list ids
+listCodeToID = {}
+for id,code in listIDToCode.items():
+    listCodeToID[code] = id
+
+del id, code