2 .\" Copyright (c) 2001-2003
3 .\" Fraunhofer Institute for Open Communication Systems (FhG Fokus).
4 .\" All rights reserved.
6 .\" Redistribution and use in source and binary forms, with or without
7 .\" modification, are permitted provided that the following conditions
9 .\" 1. Redistributions of source code must retain the above copyright
10 .\" notice, this list of conditions and the following disclaimer.
11 .\" 2. Redistributions in binary form must reproduce the above copyright
12 .\" notice, this list of conditions and the following disclaimer in the
13 .\" documentation and/or other materials provided with the distribution.
15 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 .\" Author: Hartmut Brandt <harti@FreeBSD.org>
31 .\" ng_sscfu(4) man page
38 .Nd netgraph SSCF at the UNI node type
40 .In netnatm/saal/sscopdef.h
41 .In netnatm/saal/sscfudef.h
42 .In netgraph/atm/ng_sscfu.h
43 .Sh DEPRECATION NOTICE
45 is deprecated and may not be available in
51 netgraph node type implements ITU-T recommendation Q.2130.
52 This recommendation specifies the Service Specific Coordination
54 This is a thin sub-layer between the SSCOP (see
56 and the UNI signalling.
57 This node does not really implement a protocol but
58 provides a mapping between the signals at the upper layer of the SSCOP and
59 the signals the UNI expects at its lower layer.
60 It also provides default values for the parameters of the SSCOP.
62 After creation of the node, the SSCF instance must be created by sending
66 If the node is enabled, default SSCOP parameters
67 can be retrieved and set in the corresponding SSCOP instance.
69 The node is shut down either by a
71 message, or when all hooks are disconnected.
75 node has two hooks with fixed names:
76 .Bl -tag -width ".Va upper"
78 This hook is the interface to the SSCOP.
79 The interface expected here is exactly
80 that which is exported by the
84 This is the interface to the UNI.
85 It uses the following message format:
96 is one of the following signals:
99 SAAL_ESTABLISH_request, /* U -> SAAL: (UU) */
100 SAAL_ESTABLISH_indication, /* SAAL -> U: (UU) */
101 SAAL_ESTABLISH_confirm, /* SAAL -> U: (UU) */
102 SAAL_RELEASE_request, /* U -> SAAL: (UU) */
103 SAAL_RELEASE_confirm, /* SAAL -> U: */
104 SAAL_RELEASE_indication, /* SAAL -> U: (UU) */
105 SAAL_DATA_request, /* U -> SAAL: (DATA) */
106 SAAL_DATA_indication, /* SAAL -> U: (DATA) */
107 SAAL_UDATA_request, /* U -> SAAL: (UDATA) */
108 SAAL_UDATA_indication, /* SAAL -> U: (UDATA) */
112 The arrows in the comment show the direction of the signal, whether it
113 is a signal that comes out of the node
115 or is sent by the node user to the node
117 The type of the data expected for the signal is specified in parentheses.
118 This data starts at the
120 field of the message structure.
125 hook is disconnected and the node is enabled, the protocol state is
130 node understands the generic messages plus the following:
132 .It Dv NGM_SSCFU_GETDEFPARAM Pq Ic getdefparam
133 This message returns a
135 structure, which contains the default parameters for the SSCOP at the
137 This structure should be used for a
138 .Dv NGM_SSCOP_SETPARAM
139 message to the SSCOP node below the SSCF.
140 .It Dv NGM_SSCFU_ENABLE Pq Ic enable
141 This message creates the actual SSCF instance and initializes it.
142 Until this is done, parameters may neither be retrieved nor set,
144 received on any hook are discarded.
145 .It Dv NGM_SSCFU_DISABLE Pq Ic disable
146 Destroy the SSCF instance.
147 After this, all messages on any hooks are discarded.
148 .It Dv NGM_SSCFU_GETDEBUG Pq Ic getdebug
149 Retrieve the debugging flags in a
151 .It Dv NGM_SSCFU_SETDEBUG Pq Ic setdebug
153 The argument must be a
155 .It Dv NGM_SSCFU_GETSTATE Pq Ic getstate
156 Retrieve the current state of the SSCFU instance in a
158 If the node has not been enabled, 0 is returned.
166 .An Harti Brandt Aq Mt harti@FreeBSD.org