The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/modules/netgraph/rfc1490/ng_rfc1490.4

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    1 .\" Copyright (c) 1996-1999 Whistle Communications, Inc.
    2 .\" All rights reserved.
    3 .\" 
    4 .\" Subject to the following obligations and disclaimer of warranty, use and
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   15 .\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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   32 .\" 
   33 .\" Author: Archie Cobbs <archie@freebsd.org>
   34 .\"
   35 .\" $FreeBSD$
   36 .\" $Whistle: ng_rfc1490.8,v 1.4 1999/01/25 23:46:27 archie Exp $
   37 .\"
   38 .Dd January 19, 1999
   39 .Dt NG_RFC1490 4
   40 .Os FreeBSD
   41 .Sh NAME
   42 .Nm ng_rfc1490
   43 .Nd RFC 1490 netgraph node type
   44 .Sh SYNOPSIS
   45 .Fd #include <netgraph/ng_rfc1490.h>
   46 .Sh DESCRIPTION
   47 The
   48 .Nm rfc1490
   49 node type performs protocol encapsulation, de-encapsulation, and
   50 multiplexing according to RFC 1490 (which has since been updated by RFC 2427).
   51 This particular type of encapsulation is often used on top of frame relay
   52 DLCI channels.
   53 .Pp
   54 The
   55 .Dv downstream
   56 hook is used to transmit and receive encapsulated frames. On the other
   57 side of the node, the
   58 .Dv inet
   59 and
   60 .Dv ppp
   61 hooks are used to transmit and receive raw IP frames and PPP frames,
   62 respectively. PPP frames are transmitted and received according to
   63 RFC 1973; in particular, frames appearing on the
   64 .Dv ppp
   65 hook begin with the PPP protocol number.
   66 .Pp
   67 Typically the
   68 .Dv inet
   69 hook is connected to the
   70 .Dv inet
   71 hook of an
   72 .Xr ng_iface 4
   73 node.
   74 .Sh HOOKS
   75 This node type supports the following hooks:
   76 .Pp
   77 .Bl -tag -width foobarbazum
   78 .It Dv downstream
   79 Connects to the RFC 1490 peer entity.
   80 .It Dv inet
   81 Transmits and receives raw IP frames.
   82 .It Dv ppp
   83 Transmits and receives PPP frames.
   84 .El
   85 .Sh CONTROL MESSAGES
   86 This node type only supports the generic control messages.
   87 .Sh SHUTDOWN
   88 This node shuts down upon receipt of a
   89 .Dv NGM_SHUTDOWN
   90 control message, or when all hooks have been disconnected.
   91 .Sh BUGS
   92 Not all of RFC 1490 is implemented.
   93 .Sh SEE ALSO
   94 .Xr netgraph 4 ,
   95 .Xr ng_frame_relay 4 ,
   96 .Xr ng_iface 4 ,
   97 .Xr ngctl 8
   98 .Rs
   99 .%A C. Brown
  100 .%A A. Malis
  101 .%T "Multiprotocol Interconnect over Frame Relay"
  102 .%O RFC 2427
  103 .Re
  104 .Rs
  105 .%A W. Simpson
  106 .%T "PPP in Frame Relay"
  107 .%O RFC 1973
  108 .Re
  109 .Sh HISTORY
  110 The
  111 .Nm
  112 node type was implemented in
  113 .Fx 4.0 .
  114 .Sh AUTHORS
  115 .An Julian Elischer Aq julian@freebsd.org

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