1301549Spfg/*- 2301549Spfg * Copyright (c) 2007 Alexander Motin <mav@freebsd.org> 3301549Spfg * All rights reserved. 4301549Spfg * 5301549Spfg * Redistribution and use in source and binary forms, with or without 6301549Spfg * modification, are permitted provided that the following conditions 7301549Spfg * are met: 8301549Spfg * 1. Redistributions of source code must retain the above copyright 9301549Spfg * notice unmodified, this list of conditions, and the following 10301549Spfg * disclaimer. 11301549Spfg * 2. Redistributions in binary form must reproduce the above copyright 12301549Spfg * notice, this list of conditions and the following disclaimer in the 13301549Spfg * documentation and/or other materials provided with the distribution. 14301549Spfg * 15301549Spfg * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16301549Spfg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17301549Spfg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18301549Spfg * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19301549Spfg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20301549Spfg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21301549Spfg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22301549Spfg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23301549Spfg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24301549Spfg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25301549Spfg * SUCH DAMAGE. 26301549Spfg * 27301549Spfg * $FreeBSD$ 28301549Spfg */ 29301549Spfg 30301549Spfg/* 31301549Spfg * MPPC decompression library. 32301549Spfg * Version 1.0 33301549Spfg * 34301549Spfg * Note that Hi/Fn (later acquired by Exar Corporation) held US patents 35301549Spfg * on some implementation-critical aspects of MPPC compression. 36301549Spfg * These patents lapsed due to non-payment of fees in 2007 and by 2015 37301549Spfg * expired altogether. 38301549Spfg */ 39301549Spfg 40301549Spfg#ifndef _NET_MPPC_H_ 41301549Spfg#define _NET_MPPC_H_ 42301549Spfg 43301549Spfg#define MPPC_MANDATORY_COMPRESS_FLAGS 0 44301549Spfg#define MPPC_MANDATORY_DECOMPRESS_FLAGS 0 45301549Spfg 46301549Spfg#define MPPC_SAVE_HISTORY 1 47301549Spfg 48301549Spfg#define MPPC_OK 5 49301549Spfg#define MPPC_EXPANDED 8 50301549Spfg#define MPPC_RESTART_HISTORY 16 51301549Spfg#define MPPC_DEST_EXHAUSTED 32 52301549Spfg 53301549Spfgextern size_t MPPC_SizeOfCompressionHistory(void); 54301549Spfgextern size_t MPPC_SizeOfDecompressionHistory(void); 55301549Spfg 56301549Spfgextern void MPPC_InitCompressionHistory(char *history); 57301549Spfgextern void MPPC_InitDecompressionHistory(char *history); 58301549Spfg 59301549Spfgextern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef); 60301549Spfgextern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags); 61301549Spfg 62301549Spfg#endif 63