1 files changed, 60 insertions, 0 deletions
diff --git a/sys/net/mppc.h b/sys/net/mppc.h
new file mode 100644
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+++ b/sys/net/mppc.h
@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 2007 Alexander Motin <mav@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * MPPC decompression library.
+ * Version 1.0
+ *
+ * Note that Hi/Fn (later acquired by Exar Corporation) held US patents
+ * on some implementation-critical aspects of MPPC compression.
+ * These patents lapsed due to non-payment of fees in 2007 and by 2015
+ * expired altogether.
+ */
+
+#ifndef _NET_MPPC_H_
+#define	_NET_MPPC_H_
+
+#define	MPPC_MANDATORY_COMPRESS_FLAGS 0
+#define	MPPC_MANDATORY_DECOMPRESS_FLAGS 0
+
+#define	MPPC_SAVE_HISTORY 1
+
+#define	MPPC_OK 5
+#define	MPPC_EXPANDED 8
+#define	MPPC_RESTART_HISTORY 16
+#define	MPPC_DEST_EXHAUSTED 32
+
+extern size_t MPPC_SizeOfCompressionHistory(void);
+extern size_t MPPC_SizeOfDecompressionHistory(void);
+
+extern void MPPC_InitCompressionHistory(char *history);
+extern void MPPC_InitDecompressionHistory(char *history);
+
+extern int MPPC_Compress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags, int undef);
+extern int MPPC_Decompress(u_char **src, u_char **dst, u_long *srcCnt, u_long *dstCnt, char *history, int flags);
+
+#endif