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diff --git a/share/man/man4/ng_sscfu.4 b/share/man/man4/ng_sscfu.4 new file mode 100644 index 0000000..c44c1f4 --- /dev/null +++ b/share/man/man4/ng_sscfu.4 @@ -0,0 +1,161 @@ +.\" +.\" Copyright (c) 2001-2003 +.\" Fraunhofer Institute for Open Communication Systems (FhG Fokus). +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON 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 ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" Author: Hartmut Brandt <harti@FreeBSD.org> +.\" +.\" $FreeBSD$ +.\" +.\" ng_sscfu(4) man page +.\" +.Dd October 24, 2003 +.Dt NG_SSCFU 4 +.Os +.Sh NAME +.Nm ng_sscfu +.Nd netgraph SSCF at the UNI node type +.Sh SYNOPSIS +.In netnatm/saal/sscopdef.h +.In netnatm/saal/sscfudef.h +.In netgraph/atm/ng_sscfu.h +.Sh DESCRIPTION +The +.Nm sscfu +netgraph node type implements ITU-T recommendation Q.2130. +This recommendation specifies the Service Specific Coordination +Function at the UNI. +This is a thin sub-layer between the SSCOP (see +.Xr ng_sscop 4 ) +and the UNI signalling. +This node does not really implement a protocol but +provides a mapping between the signals at the upper layer of the SSCOP and +the signals the UNI expects at its lower layer. +It also provides default values for the parameters of the SSCOP. +.Pp +After creation of the node, the SSCF instance must be created by sending +an +.Dq enable +message to the node. +If the node is enabled, default SSCOP parameters +can be retrieved and set in the corresponding SSCOP instance. +.Pp +The node is shut down either by a +.Dv NGM_SHUTDOWN +message, or when all hooks are disconnected. +.Sh HOOKS +Each +.Nm sscfu +node has two hooks with fixed names: +.Bl -tag -width ".Va upper" +.It Va lower +This hook is the interface to the SSCOP. +The interface expected here is exactly +that which is exported by the +.Xr ng_sscop 4 +node type. +.It Va upper +This is the interface to the UNI. +It uses the following message format: +.Bd -literal +struct sscfu_arg { + uint32_t sig; + u_char data[]; +}; +.Ed +.Pp +The +.Va sig +field +is one of the following signals: +.Bd -literal +enum saal_sig { + SAAL_ESTABLISH_request, /* U -> SAAL: (UU) */ + SAAL_ESTABLISH_indication, /* SAAL -> U: (UU) */ + SAAL_ESTABLISH_confirm, /* SAAL -> U: (UU) */ + SAAL_RELEASE_request, /* U -> SAAL: (UU) */ + SAAL_RELEASE_confirm, /* SAAL -> U: */ + SAAL_RELEASE_indication, /* SAAL -> U: (UU) */ + SAAL_DATA_request, /* U -> SAAL: (DATA) */ + SAAL_DATA_indication, /* SAAL -> U: (DATA) */ + SAAL_UDATA_request, /* U -> SAAL: (UDATA) */ + SAAL_UDATA_indication, /* SAAL -> U: (UDATA) */ +}; +.Ed +.Pp +The arrows in the comment show the direction of the signal, whether it +is a signal that comes out of the node +.Pq Ql -> , +or is sent by the node user to the node +.Pq Ql <- . +The type of the data expected for the signal is specified in parentheses. +This data starts at the +.Va data +field of the message structure. +.El +.Pp +If the +.Va lower +hook is disconnected and the node is enabled, the protocol state is +reset. +.Sh CONTROL MESSAGES +The +.Nm sscfu +node understands the generic messages plus the following: +.Bl -tag -width foo +.It Dv NGM_SSCFU_GETDEFPARAM Pq Ic getdefparam +This message returns a +.Vt sscop_param +structure, which contains the default parameters for the SSCOP at the +UNI. +This structure should be used for a +.Dv NGM_SSCOP_SETPARAM +message to the SSCOP node below the SSCF. +.It Dv NGM_SSCFU_ENABLE Pq Ic enable +This message creates the actual SSCF instance and initializes it. +Until this is done, parameters may neither be retrieved nor set, +and all messages +received on any hook are discarded. +.It Dv NGM_SSCFU_DISABLE Pq Ic disable +Destroy the SSCF instance. +After this, all messages on any hooks are discarded. +.It Dv NGM_SSCFU_GETDEBUG Pq Ic getdebug +Retrieve the debugging flags in a +.Vt uint32_t . +.It Dv NGM_SSCFU_SETDEBUG Pq Ic setdebug +Set debugging flags. +The argument must be a +.Vt uint32_t . +.It Dv NGM_SSCFU_GETSTATE Pq Ic getstate +Retrieve the current state of the SSCFU instance in a +.Vt uint32_t . +If the node has not been enabled, 0 is returned. +.El +.Sh SEE ALSO +.Xr netgraph 4 , +.Xr ng_atm 4 , +.Xr ng_sscop 4 , +.Xr ngctl 8 +.Sh AUTHORS +.An Harti Brandt Aq harti@FreeBSD.org |
