uint message_len  -- Length of the message (including the message code)
    uint message_code -- Message code
    Message specific data
   

    bool   -- 8bit character (0 == false, not 0 == true)
    uint   -- 32bit unsigned little endian ordered integer
    off_t  -- 64bit signed little endian ordered integer
    string -- the length of the string (as an uint) + character data
              (all strings are UTF8)
   

     userdata           -- statistics about a user
       uint status      -- user's status
       uint avgspeed    -- user's average upload speed
       uint downloadnum -- (unknown)
       uint files       -- number of files a user has shared
       uint dirs        -- number of dirs a user has shared
       bool slotsfull   -- wether or not the user has an upload slot available
     
     
     transfer           -- information about a transfer
       bool is_upload   -- Is this an upload or a download?
       string user      -- The user associated with this transfer
       string path      -- The original path to the transfer
       uint place       -- Place in queue or (uint)-1 if unknown (only valid for downloads)
       uint state       -- The transfer's state
                           00: Finished
                           01: Transferring
                           02: Negotiating
                           03: Waiting
                           04: Establishing
                           05: Initiating
                           06: Connecting
                           07: Queued
                           08: Getting address
                           09: Getting status
                           10: Awaiting user
                           11: Connection closed
                           12: Cannot connect
                           13: Aborted
                           14: Error
       string error     -- If the transfer's in error state, this contains the error
       off_t position   -- How far has the transfer proceded
       off_t size       -- Total size of this transfer
       uint rate        -- How fast the transfer is proceding
       
       
     fileentry          -- information about a shared file
       off_t filesize   -- the file's size
       string ext       -- the file's extended attribute format
                           (only 'mp3' or an empty string are supported)
       uint numattrs    -- number of extended attributes
       *repeat numattrs*
         uint attr      -- an attribute
      
       The 'mp3' extended attribute format holds 3 attributes:
         uint bitrate   -- the bitrate of the file
         uint length    -- duration of the file in seconds
         uint vbr       -- wether the mp3 has a variable bitrate or not
    
     
     folder             -- information about a shared folder
       uint numfiles    -- how many files the folder contains
       *repeat numfiles*
         string file    -- the filename or full path (depends on context)
         fileentry info -- the file's information
    
     
     shares             -- information about a user's shares
       uint numfolders  -- how many folders there are
       *repeat numfolders*
         string folder  -- the folder's path
         folder files   -- the files contained in this folder (filenames are relative)
     
     
     cipher             -- AES (aka Rijndael) encrypted string
       Configuration strings are sent over the communication layer encrypted 
       as they may contain sensitive information. The keyphrase of the AES cipher
       equals the password used to log in. This complex data type start with the
       length of the unencrypted string (n), followed by the encrypted string
       data. Crucial note: The amount of encrypted characters sent is n rounded
       up to the nearest 16 byte block size. For exmaple: if the original string
       was 6 characters long, n will be 6 but is following by 16 characters of data.