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 53 extern size_t MPPC_SizeOfCompressionHistory(void); 54 extern size_t MPPC_SizeOfDecompressionHistory(void); 55 56 extern void MPPC_InitCompressionHistory(char *history); 57 extern void MPPC_InitDecompressionHistory(char *history); 58 59 extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef); 60 extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags); 61 62 #endif 63