mppc.h (2406B) - Raw
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 51 extern size_t MPPC_SizeOfCompressionHistory(void); 52 extern size_t MPPC_SizeOfDecompressionHistory(void); 53 54 extern void MPPC_InitCompressionHistory(char *history); 55 extern void MPPC_InitDecompressionHistory(char *history); 56 57 extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef); 58 extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags); 59 60 #endif