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Diffstat (limited to 'doc/doxygen/doc_fragmentation.h')
-rw-r--r-- | doc/doxygen/doc_fragmentation.h | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/doc/doxygen/doc_fragmentation.h b/doc/doxygen/doc_fragmentation.h deleted file mode 100644 index 90e8d9e..0000000 --- a/doc/doxygen/doc_fragmentation.h +++ /dev/null @@ -1,95 +0,0 @@ -/* - * 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) 2010-2018 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; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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. - */ |