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Diffstat (limited to 'openvpn/doc/doxygen/doc_compression.h')
| -rw-r--r-- | openvpn/doc/doxygen/doc_compression.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/openvpn/doc/doxygen/doc_compression.h b/openvpn/doc/doxygen/doc_compression.h deleted file mode 100644 index bdc4a7ed..00000000 --- a/openvpn/doc/doxygen/doc_compression.h +++ /dev/null @@ -1,92 +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 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 Compression module documentation file. - */ - -/** - * @defgroup compression Data Channel Compression module - * - * This module offers compression of data channel packets. - * - * @par State structures - * The Data Channel Compression module stores its internal state in a \c - * lzo_compress_workspace structure. This state includes flags which - * control the module's behavior and preallocated working memory. One - * such structure is present for each VPN tunnel, and is stored in the \c - * context.c2.lzo_compwork of the \c context associated with that VPN - * tunnel. - * - * @par Initialization and cleanup - * Every time a new \c lzo_compress_workspace is needed, it must be - * initialized using the \c lzo_compress_init() function. Similarly, - * every time a \c lzo_compress_workspace is no longer needed, it must be - * cleaned up using the \c lzo_compress_uninit() function. These - * functions take care of the allocation and freeing of internal working - * memory, but not of the \c lzo_compress_workspace structures themselves. - * - * @par - * Because of the one-to-one relationship between \c - * lzo_compress_workspace 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 - * lzo_compress() - * - For packets which have been received from a remote OpenVPN peer: \c - * lzo_decompress() - * - * @par Settings that control this module's activity - * Whether or not the Data Channel Compression module is active depends on - * the compile-time \c ENABLE_LZO preprocessor macro and the runtime flags - * stored in \c lzo_compress_workspace.flags of the associated VPN tunnel. - * The latter are initialized from \c options.lzo, which gets its value - * from the process's configuration sources, such as its configuration - * file or command line %options. - * - * @par Adaptive compression - * The compression module supports adaptive compression. If this feature - * is enabled, the compression routines monitor their own performance and - * turn compression on or off depending on whether it is leading to - * significantly reduced payload size. - * - * @par Compression algorithms - * This module uses the Lempel-Ziv-Oberhumer (LZO) compression algorithms. - * These offer lossless compression and are designed for high-performance - * decompression. This module uses the external \c lzo library's - * implementation of the algorithms. - * - * @par - * For more information on the LZO library, see:\n - * http://www.oberhumer.com/opensource/lzo/ - */ |