Exit mechanisms for the FTP server and FTP client

If you want to perform code conversions for the transferred data, where the number of bytes will not be preserved, then XHCS cannot be used. However, there is a special interface that can be used for the FTP server and FTP client to define your own code conversion routines as well as other exit routines, such as routines for "on the fly" data compressions. Such a user-defined exit routine is called once activated before data is sent and after data is received. Please note that with the transfer type ASCII, the exit routine always requires data that has been converted to ASCII.