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diff --git a/sys/netgraph/ng_vjc.h b/sys/netgraph/ng_vjc.h
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+
+/*
+ * ng_vjc.h
+ *
+ * Copyright (c) 1996-1999 Whistle Communications, Inc.
+ * All rights reserved.
+ * 
+ * Subject to the following obligations and disclaimer of warranty, use and
+ * redistribution of this software, in source or object code forms, with or
+ * without modifications are expressly permitted by Whistle Communications;
+ * provided, however, that:
+ * 1. Any and all reproductions of the source or object code must include the
+ *    copyright notice above and the following disclaimer of warranties; and
+ * 2. No rights are granted, in any manner or form, to use Whistle
+ *    Communications, Inc. trademarks, including the mark "WHISTLE
+ *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
+ *    such appears in the above copyright notice or in the software.
+ * 
+ * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
+ * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
+ * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
+ * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
+ * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
+ * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
+ * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
+ * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
+ * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
+ * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Archie Cobbs <archie@whistle.com>
+ *
+ * $FreeBSD$
+ * $Whistle: ng_vjc.h,v 1.6 1999/01/25 02:40:22 archie Exp $
+ */
+
+#ifndef _NETGRAPH_VJC_H_
+#define _NETGRAPH_VJC_H_
+
+ /* Node type name and magic cookie */
+#define NG_VJC_NODE_TYPE	"vjc"
+#define NGM_VJC_COOKIE		868219207
+
+ /* Hook names */
+#define NG_VJC_HOOK_IP		"ip"		/* normal IP traffic */
+#define NG_VJC_HOOK_VJCOMP	"vjcomp"	/* compressed TCP */
+#define NG_VJC_HOOK_VJUNCOMP	"vjuncomp"	/* uncompressed TCP */
+#define NG_VJC_HOOK_VJIP	"vjip"		/* uncompressed IP */
+
+ /* Minimum and maximum number of channels */
+#define NG_VJC_MIN_CHANNELS	4
+#define NG_VJC_MAX_CHANNELS	16
+
+ /* Configure struct */
+struct ngm_vjc_config {
+	u_char	enabled;	/* Enable compression/decompression */
+	u_char	numChannels;	/* Number of outgoing channels */
+	u_char	compressCID;	/* OK to compress outgoing CID's */
+};
+
+ /* Netgraph commands */
+enum {
+	NGM_VJC_CONFIG,		/* Supply a struct ngm_vjc_config */
+	NGM_VJC_GET_STATE,	/* Returns current struct slcompress */
+	NGM_VJC_CLR_STATS,	/* Clears statistics counters */
+	NGM_VJC_RECV_ERROR,	/* Indicate loss of incoming frame */
+};
+
+#endif /* _NETGRAPH_VJC_H_ */