OpenVPN
lzo.h
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1 /*
2  * OpenVPN -- An application to securely tunnel IP networks
3  * over a single UDP port, with support for SSL/TLS-based
4  * session authentication and key exchange,
5  * packet encryption, packet authentication, and
6  * packet compression.
7  *
8  * Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2
12  * as published by the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, write to the Free Software Foundation, Inc.,
21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22  */
23 
24 #ifndef OPENVPN_LZO_H
25 #define OPENVPN_LZO_H
26 
27 
34 #if defined(ENABLE_LZO)
35 
41 #if defined(HAVE_LZO_LZOUTIL_H)
42 #include <lzo/lzoutil.h>
43 #elif defined(HAVE_LZOUTIL_H)
44 #include <lzoutil.h>
45 #endif
46 #if defined(HAVE_LZO_LZO1X_H)
47 #include <lzo/lzo1x.h>
48 #elif defined(HAVE_LZO1X_H)
49 #include <lzo1x.h>
50 #endif
51 
52 #include "buffer.h"
53 #include "mtu.h"
54 #include "common.h"
55 #include "status.h"
56 
57 extern const struct compress_alg lzo_alg;
58 
59 /**************************************************************************//***********************/
61 #define LZO_COMPRESS lzo1x_1_15_compress
62 
68 #define LZO_WORKSPACE LZO1X_1_15_MEM_COMPRESS
69 
72 #define LZO_DECOMPRESS lzo1x_decompress_safe
73 /**************************************/
83 
84 
85 /**************************************************************************//************************/
87 #define AC_SAMP_SEC 2
88 #define AC_MIN_BYTES 1000
91 #define AC_SAVE_PCT 5
94 #define AC_OFF_SEC 60 /*******************************/
97 
101 struct lzo_adaptive_compress {
102  bool compress_state;
103  time_t next;
104  int n_total;
105  int n_comp;
106 };
107 
108 
119 struct lzo_compress_workspace
120 {
121  lzo_voidp wmem;
122  int wmem_size;
123  struct lzo_adaptive_compress ac;
124 };
125 
129 #endif /* ENABLE_LZO && USE_COMP */
130 #endif /* ifndef OPENVPN_LZO_H */