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 * $FreeBSD$
28 */
29
30/*
31 * MPPC decompression library.
32 * Version 1.0
33 *
34 * Note that Hi/Fn (later acquired by Exar Corporation) held US patents
35 * on some implementation-critical aspects of MPPC compression.
36 * These patents lapsed due to non-payment of fees in 2007 and by 2015
37 * expired altogether.
38 */
39
40#ifndef _NET_MPPC_H_
41#define	_NET_MPPC_H_
42
43#define	MPPC_MANDATORY_COMPRESS_FLAGS 0
44#define	MPPC_MANDATORY_DECOMPRESS_FLAGS 0
45
46#define	MPPC_SAVE_HISTORY 1
47
48#define	MPPC_OK 5
49#define	MPPC_EXPANDED 8
50#define	MPPC_RESTART_HISTORY 16
51#define	MPPC_DEST_EXHAUSTED 32
52
53extern size_t MPPC_SizeOfCompressionHistory(void);
54extern size_t MPPC_SizeOfDecompressionHistory(void);
55
56extern void MPPC_InitCompressionHistory(char *history);
57extern void MPPC_InitDecompressionHistory(char *history);
58
59extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef);
60extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags);
61
62#endif
63