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B<Default value>: ""

=item __sasl 

B<Description>: Authen::SASL Handle

B<Default value>: undef

=back 

=head1 Class METHODS

=head3 PUBLIC METHODS

=over 2

=item clean (  ) 

=item IsConnected (  ) 

B<Description>: are we connected?


B<Returns:> true, if the ARCv2 control connection is connected, otherwise false


B<Example:>

last unless $arc->IsConnected;


=back 

=over 2

=item DESTROY (  ) I<inherited from Arc>

B<Description>: Destructor


=item IsError (  ) I<inherited from Arc>

B<Description>: User function to get the error msg.


B<Returns:> the error message if any otherwise undef


B<Example:>

unless (my $err = $arc->IsError()) { .. } else { print STDERR $err; }


=item Log ( $facility, ... (message) ) I<inherited from Arc>

B<Description>: Log function.
Logs messages to 'logdestination' if 'loglevel' is is set appropriatly.
loglevel behaviour has changed in the 1.0 release of ARCv2, the "Arc"-class can export
LOG_AUTH (authentication information), LOG_USER (connection information), LOG_ERR (errors), 
LOG_CMD (ARCv2 addition internal command information), LOG_SIDE (verbose client/server-specific
information), LOG_DEBUG (verbose debug information). It possible to combine the 
levels with or (resp. +) to allow a message to appear when not all loglevels are 
requested by the user.
Commonly used for logging errors from application level.


B<Returns:> always false


B<Example:>

return $arc->Log(LOG_ERR,"Message");


=item new ( %hash, key => val, ... ) I<inherited from Arc>

B<Description>: Constructor. 
Initializes the object and returns it blessed.
For all sub classes, please override C<_Init> to check the 
parameter which are passed to the C<new> function. This
is necessary because you are not able to call the the new method of a
parent class, when having a class name (new $class::SUPER::new, does not work.).


B<Returns:> blessed object of the class


B<Example:>

my $this = new Arc::Class ( key => value, key2 => value2 );


=back 

=over 2

=back 

=head3 PROTECTED METHODS

=over 2

=item _CommandConnection (  ) 

B<Description>: initializes command connection. (protocol)
Starts listen on the Command socket and sends the B<CMDPASV> command.


B<Returns:> true if everything went like expected, otherwise false.


B<Example:>

$this->_CommandConnection();


=item _Init (  ) I<reimplemented from Arc>

=item _PrepareAuthentication (  ) 

B<Description>: initialize sasl.