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-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single TCP/UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2010 Fox Crypto B.V. <openvpn@fox-it.com>
- *
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/**
- * @file
- * Data Channel Fragmentation module documentation file.
- */
-
-/**
- * @defgroup fragmentation Data Channel Fragmentation module
- *
- * The Data Channel Fragmentation module offers fragmentation of data
- * channel packets.
- *
- * @par State structures
- * The Data Channel Fragmentation module stores its internal state in a \c
- * fragment_master structure.  One such structure is present for each VPN
- * tunnel, and is stored in \c context.c2.fragment of the \c context
- * associated with that VPN tunnel.
- *
- * @par
- * The \c fragment_master structure contains one \c fragment_list
- * structure \c fragment_master.incoming.  This is a list of \c fragment
- * structures, each of which can store the parts of one fragmented packet
- * while it is being reassembled.  The \c fragment_master structure also
- * contains one \c buffer called \c fragment_master.outgoing, in which a
- * data channel large packet to be sent to a remote OpenVPN peer can be
- * broken up into parts to be sent one by one.
- *
- * @par Initialization and cleanup
- * Every time a new \c fragment_master is needed, it must be allocated and
- * initialized by the \c fragment_init() function.  Similarly, every time
- * a \c fragment_master is no longer needed, it must be cleaned up using
- * the \c fragment_free() function.  These functions take care of the
- * allocation and freeing of the \c fragment_master structure itself and
- * all internal memory required for the use of that structure.  Note that
- * this behavior is different from that displayed by the \link compression
- * Data Channel Compression module\endlink.
- *
- * @par
- * Because of the one-to-one relationship between \c fragment_master
- * structures and VPN tunnels, the above-mentioned initialization and
- * cleanup functions are called directly from the \c init_instance() and
- * \c close_instance() functions, which control the initialization and
- * cleanup of VPN tunnel instances and their associated \c context
- * structures.
- *
- * @par Packet processing functions
- * This module receives data channel packets from the \link data_control
- * Data Channel Control module\endlink and processes them according to the
- * settings of the packet's VPN tunnel.  The \link data_control Data
- * Channel Control module\endlink uses the following interface functions:
- * - For packets which will be sent to a remote OpenVPN peer: \c
- *   fragment_outgoing() \n This function inspects data channel packets as
- *   they are being made ready to be sent as VPN tunnel packets to a
- *   remote OpenVPN peer.  If a packet's size is larger than its
- *   destination VPN tunnel's maximum transmission unit (MTU), then this
- *   module breaks that packet up into smaller parts, each of which is
- *   smaller than or equal to the VPN tunnel's MTU.  See \c
- *   fragment_outgoing() for details.
- * - For packets which have been received from a remote OpenVPN peer: \c
- *   fragment_incoming() \n This function inspects data channel packets
- *   that have been received from a remote OpenVPN peer through a VPN
- *   tunnel.  It reads the fragmentation header of the packet, and
- *   depending on its value performs the appropriate action.  See \c
- *   fragment_incoming() for details.
- *
- * @par Settings that control this module's activity
- * Whether the Data Channel Fragmentation module is active or not depends
- * on the compile-time \c ENABLE_FRAGMENT preprocessor macro and the
- * runtime flag \c options.fragment, which gets its value from the
- * process's configuration sources, such as the configuration file and
- * commandline %options.
- */