=head1 NAME

Net::SIP::NATHelper::Local - handle NAT/RTP forwarding in local event loop.

=head1 DESCRIPTION

This module is a wrapper around L<Net::SIP::NATHelper::Base> which will
handle the RTP forwarding within the local event loop the rest of L<Net::SIP>
uses.

=head1 CONSTRUCTOR

=over 4

=item new ( LOOP )

Will create the object and tell it to use LOOP as the event loop.
Will create a L<Net::SIP::NATHelper::Base> object which gets used
internally.

=back

=head1 METHODS

=over 4

=item allocate_sockets ( ... )

Calls B<allocate_sockets> of the local L<Net::SIP::NATHelper::Base>
object. Takes and returns the same arguments.

=item activate_session ( ... )

Calls B<activate_session> of the local L<Net::SIP::NATHelper::Base>
object. Takes the same arguments and returns 1 if the session was
newly activated, -1 if it was activated before and false if activation failed.
Updates callbacks into the event loop.

=item close_session ( ... )

Calls B<activate_session> of the local L<Net::SIP::NATHelper::Base>
object. Takes the same arguments and returns the number of closed
sessions.
Updates callbacks into the event loop.

=item expire ( ... )

Calls B<expire> of the local L<Net::SIP::NATHelper::Base>
object. Takes the same arguments and returns the number of expired
sessions.
Updates callbacks into the event loop if necessary.

=back