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/share/man/man4/ng_atmllc.4

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 1.\" Copyright (c) 2004 Benno Rice <benno@FreeBSD.org>
 2.\" All rights reserved.
 3.\"
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 5.\" modification, are permitted provided that the following conditions
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25.\" $FreeBSD$
26.\"
27.Dd March 8, 2004
28.Dt NG_ATMLLC 4
29.Os
30.Sh NAME
31.Nm ng_atmllc
32.Nd ATM LLC netgraph node type
33.Sh SYNOPSIS
34.In netgraph/ng_atmllc.h
35.Sh DESCRIPTION
36The
37.Nm atmllc
38node type translates frames in to and out of ATM LLC encapsulation,
39as specified by RFC 1483.
40In LLC encapsulation the protocol of a given protocol data unit (PDU) is
41specified by an IEEE 802.2 LLC header, possibly followed by an IEEE 802.1a
42SubNetwork Attachment Point (SNAP) header.
43This node currently handles the Ethernet and FDDI protocols.
44.Pp
45The node transmits and receives ATM PDUs on the
46.Va atm
47hook.
48Received PDUs are decoded and forwarded to the
49.Va ether
50or
51.Va fddi
52hooks as appropriate.
53Data received on the
54.Va ether
55or
56.Va fddi
57hooks are assumed to be full Ethernet or FDDI packets as appropriate and are
58encapsulated into a PDU and transmitted via the
59.Va atm
60hook.
61.Sh HOOKS
62This node type supports the following hooks:
63.Bl -tag -width indent
64.It Va atm
65ATM connection.
66Typically, this hook would be connected to a
67.Xr ng_atm 4
68node, which handles transmission of ATM PDUs over an ATM device.
69.It Va ether
70Ethernet connection.
71This hook sends and receives Ethernet frames.
72This would normally be connected to an
73.Xr ng_eiface 4
74node if in use.
75.It Va fddi
76FDDI connection.
77This hook sends and receives FDDI frames.
78.El
79.Sh CONTROL MESSAGES
80This node type supports the generic control messages.
81.Sh SHUTDOWN
82This node shuts down upon receipt of a
83.Dv NGM_SHUTDOWN
84control message, or when all hooks have been disconnected.
85.Sh SEE ALSO
86.Xr netgraph 4 ,
87.Xr ng_atm 4 ,
88.Xr ng_eiface 4 ,
89.Xr ngctl 8
90.Rs
91.%A J. Heinanen
92.%T "Multiprotocol Encapsulation over ATM Adaptation Layer 5"
93.%O RFC 1483
94.Re
95.Sh AUTHORS
96.An Benno Rice Aq benno@FreeBSD.org