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=head1 NAME
Net::SIP::NATHelper::Client - handle NAT/RTP forwarding using remote process
=head1 DESCRIPTION
This module implements the interface of L<Net::SIP::NATHelper::Base>
but will talk with a remote process based on L<Net::SIP::NATHelper::Server>
while executing the methods.
=head1 CONSTRUCTOR
=over 4
=item new ( SOCKET )
Will create a new object which will talk with the remote process using
the socket SOCKET. SOCKET is either a UNIX domain socket (in SOCK_STREAM
mode) or an C<host:port> specification in which case it will talk TCP
through the socket.
=back
=head1 METHODS
It implements the method B<allocate_sockets>, B<activate_session>
and B<close_session> with the same arguments as given in
L<Net::SIP::NATHelper::Server> by calling B<rpc> with the methods
"allocate", "activate" resp. "close".
=over 4
=item rpc ( METHOD,@ARG )
Makes a synchronous remote call to the server through the in the
constructor specified socket and returns the result.
For calling the arguments will be put into a \@list which will
be packet using L<Storable>. A similar way the result comes back.
=back
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