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=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
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