lzo.h

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/*
 *  OpenVPN -- An application to securely tunnel IP networks
 *             over a single UDP port, with support for SSL/TLS-based
 *             session authentication and key exchange,
 *             packet encryption, packet authentication, and
 *             packet compression.
 *
 *  Copyright (C) 2002-2025 OpenVPN Inc <sales@openvpn.net>
 *
 *  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, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef OPENVPN_LZO_H
#define OPENVPN_LZO_H
 
 
#if defined(ENABLE_LZO)
 
#if defined(HAVE_LZO_LZO1X_H)
#include <lzo/lzo1x.h>
#elif defined(HAVE_LZO1X_H)
/* The lzo.h magic gets confused and still wants
 * to include lzo/lzoconf.h even if our include paths
 * are setup to include the paths without lzo/
 */
#include <lzodefs.h>
#include <lzoconf.h>
#include <lzo1x.h>
#endif
 
#include "buffer.h"
#include "mtu.h"
#include "common.h"
#include "status.h"
 
extern const struct compress_alg lzo_alg;
 
/**************************************************************************/
#define LZO_COMPRESS   lzo1x_1_15_compress
#define LZO_WORKSPACE  LZO1X_1_15_MEM_COMPRESS
#define LZO_DECOMPRESS lzo1x_decompress_safe
 
 
/**************************************************************************/
#define AC_SAMP_SEC 2                               
#define AC_MIN_BYTES                                                                      \
    1000                                            
#define AC_SAVE_PCT                                                                        \
    5                                               
#define AC_OFF_SEC                                                                             \
    60                                              
 
struct lzo_adaptive_compress
{
    bool compress_state;
    time_t next;
    int n_total;
    int n_comp;
};
 
 
struct lzo_compress_workspace
{
    lzo_voidp wmem;
    int wmem_size;
    struct lzo_adaptive_compress ac;
};
 
#endif /* ENABLE_LZO && USE_COMP */
#endif /* ifndef OPENVPN_LZO_H */