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-.\" 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_rfc1490.8,v 1.4 1999/01/25 23:46:27 archie Exp $
-.\"
-.Dd January 19, 1999
-.Dt NG_RFC1490 4
-.Os FreeBSD
-.Sh NAME
-.Nm ng_rfc1490
-.Nd RFC 1490 netgraph node type
-.Sh SYNOPSIS
-.Fd #include <netgraph/ng_rfc1490.h>
-.Sh DESCRIPTION
-The
-.Nm rfc1490
-node type performs protocol encapsulation, de-encapsulation, and
-multiplexing according to RFC 1490 (which has since been updated by RFC 2427).
-This particular type of encapsulation is often used on top of frame relay
-DLCI channels.
-.Pp
-The
-.Dv downstream
-hook is used to transmit and receive encapsulated frames. On the other
-side of the node, the
-.Dv inet
-and
-.Dv ppp
-hooks are used to transmit and receive raw IP frames and PPP frames,
-respectively. PPP frames are transmitted and received according to
-RFC 1973; in particular, frames appearing on the
-.Dv ppp
-hook begin with the PPP protocol number.
-.Pp
-Typically the
-.Dv inet
-hook is connected to the
-.Dv inet
-hook of an
-.Xr ng_iface 4
-node.
-.Sh HOOKS
-This node type supports the following hooks:
-.Pp
-.Bl -tag -width foobarbazum
-.It Dv downstream
-Connects to the RFC 1490 peer entity.
-.It Dv inet
-Transmits and receives raw IP frames.
-.It Dv ppp
-Transmits and receives PPP frames.
-.El
-.Sh CONTROL MESSAGES
-This node type only supports the generic control messages.
-.Sh SHUTDOWN
-This node shuts down upon receipt of a
-.Dv NGM_SHUTDOWN
-control message, or when all hooks have been disconnected.
-.Sh BUGS
-Not all of RFC 1490 is implemented.
-.Sh SEE ALSO
-.Xr netgraph 4 ,
-.Xr ng_frame_relay 4 ,
-.Xr ng_iface 4 ,
-.Xr ngctl 8
-.Rs
-.%A C. Brown
-.%A A. Malis
-.%T "Multiprotocol Interconnect over Frame Relay"
-.%O RFC 2427
-.Re
-.Rs
-.%A W. Simpson
-.%T "PPP in Frame Relay"
-.%O RFC 1973
-.Re
-.Sh HISTORY
-The
-.Nm
-node type was implemented in
-.Fx 4.0 .
-.Sh AUTHORS
-.An Julian Elischer Aq julian@whistle.com