A node that implements Predictor-1 compression for PPP.

Submitted by:	Alexander Motin <mav alkar.net>

1 files changed, 83 insertions, 0 deletions

diff --git a/sys/netgraph/ng_pred1.h b/sys/netgraph/ng_pred1.h
new file mode 100644
index 0000000..a33d120
--- /dev/null
+++ b/sys/netgraph/ng_pred1.h
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+/*-
+ * Copyright (c) 2006 Alexander Motin <mav@alkar.net>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _NETGRAPH_NG_PRED1_H_
+#define _NETGRAPH_NG_PRED1_H_
+
+/* Node type name and magic cookie */
+#define NG_PRED1_NODE_TYPE	"pred1"
+#define NGM_PRED1_COOKIE	1166902612
+
+/* Hook names */
+#define NG_PRED1_HOOK_COMP	"comp"		/* compression hook */
+#define NG_PRED1_HOOK_DECOMP	"decomp"	/* decompression hook */
+
+/* Config struct */
+struct ng_pred1_config {
+	u_char		enable;			/* node enabled */
+};
+
+/* Keep this in sync with the above structure definition. */
+#define NG_PRED1_CONFIG_INFO	{			\
+	{ "enable",	&ng_parse_uint8_type	},	\
+	{ NULL }					\
+}
+
+/* Statistics structure for one direction. */
+struct ng_pred1_stats {
+	uint64_t	FramesPlain;
+	uint64_t	FramesComp;
+	uint64_t	FramesUncomp;
+	uint64_t	InOctets;
+	uint64_t	OutOctets;
+	uint64_t	Errors;
+};
+
+/* Keep this in sync with the above structure definition. */
+#define NG_PRED1_STATS_INFO	{				\
+	{ "FramesPlain",&ng_parse_uint64_type	},	\
+	{ "FramesComp",	&ng_parse_uint64_type	},	\
+	{ "FramesUncomp", &ng_parse_uint64_type	},	\
+	{ "InOctets",	&ng_parse_uint64_type	},	\
+	{ "OutOctets",	&ng_parse_uint64_type	},	\
+	{ "Errors",	&ng_parse_uint64_type	},	\
+	{ NULL }					\
+}
+
+/* Netgraph commands */
+enum {
+	NGM_PRED1_CONFIG = 1,
+	NGM_PRED1_RESETREQ,			/* sent either way! */
+	NGM_PRED1_GET_STATS,
+	NGM_PRED1_CLR_STATS,
+	NGM_PRED1_GETCLR_STATS,
+};
+
+#endif /* _NETGRAPH_NG_PRED1_H_ */
+