1/*-
2 * Copyright (c) 2007 Alexander Motin <mav@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28/*
29 * MPPC decompression library.
30 * Version 1.0
31 *
32 * Note that Hi/Fn (later acquired by Exar Corporation) held US patents
33 * on some implementation-critical aspects of MPPC compression.
34 * These patents lapsed due to non-payment of fees in 2007 and by 2015
35 * expired altogether.
36 */
37
38#ifndef _NET_MPPC_H_
39#define _NET_MPPC_H_
40
41#define MPPC_MANDATORY_COMPRESS_FLAGS 0
42#define MPPC_MANDATORY_DECOMPRESS_FLAGS 0
43
44#define MPPC_SAVE_HISTORY 1
45
46#define MPPC_OK 5
47#define MPPC_EXPANDED 8
48#define MPPC_RESTART_HISTORY 16
49#define MPPC_DEST_EXHAUSTED 32
50
51extern size_t MPPC_SizeOfCompressionHistory(void);
52extern size_t MPPC_SizeOfDecompressionHistory(void);
53
54extern void MPPC_InitCompressionHistory(char *history);
55extern void MPPC_InitDecompressionHistory(char *history);
56
57extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef);
58extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags);
59
60#endif