325 lines
9.4 KiB
Groff
325 lines
9.4 KiB
Groff
.\"
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.\" Copyright (c) 2001-2004
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.\" Fraunhofer Institute for Open Communication Systems (FhG Fokus).
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.\" All rights reserved.
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.\" Copyright (c) 2005
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.\" Hartmut Brandt.
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.\" All rights reserved.
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.\"
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.\" Author: Harti Brandt <harti@FreeBSD.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 10, 2005
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.Dt NG_CCATM 4
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.Os
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.Sh NAME
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.Nm ng_ccatm
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.Nd "ATM Call Control netgraph node type"
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.Sh SYNOPSIS
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.In netnatm/unimsg.h
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.In netnatm/msg/unistruct.h
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.In netnatm/sig/unidef.h
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.In netnatm/api/unisap.h
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.In netnatm/api/atmapi.h
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.In netnatm/api/ccatm.h
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.In netgraph.h
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.In netgraph/ng_uni.h
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.In netgraph/ng_ccatm.h
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.Sh DESCRIPTION
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The
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.Nm
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node implements the API specified by the ATM Forum for access to ATM services
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(see ATM-Forum document
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.Pa af-saa-0108 ) .
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This document specifies the semantics
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of the API, not the exact language binding.
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For this reason, it is expected that
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this implementation is neither compile-time nor binary compatible with
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other implementations of this API.
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It should, however, be fairly straightforward
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to convert between different API implementations.
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.Pp
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This node is usually stacked on top of one or more UNI nodes (see
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.Xr ng_uni 4 ) .
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Each of these hooks appears as a
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.Dq port
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to the user of the node.
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It also has one hook connected to the ILMI daemon for management purposes.
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.Pp
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The node is removed when it receives a
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.Dv NGM_SHUTDOWN
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messages or when all hooks are disconnected.
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.Sh HOOKS
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The node understands a number of hooks with predefined names and an
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unlimited number of hooks for user connections.
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The predefined names are:
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.Bl -tag -width ".Va orphans"
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.It Va uni Ns Ar NNN
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These hooks stack the
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.Nm
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node on top of a UNI stack.
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The node expects the interface on these hooks
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to conform to the upper interface specified in
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.Xr ng_uni 4 .
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These hooks are forced into queuing mode, so that there are no circular
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calls from call control to UNI and UNI back to call control.
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The
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.Ar NNN
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in the hook name is the decimal port number and should not be zero.
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The port number is a 32-bit unsigned integer.
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.It Va manage
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This hook should be connected to the ILMI daemon.
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No data is ever sent on this hook and all received data is discarded.
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The hook is used to send control messages along.
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.It Va dump
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On receipt of a
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.Dv NGM_CCATM_DUMP
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command a textual description of the current state of the node is sent
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out of this hook.
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This text is sent as one large message consisting of more
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than one
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.Vt mbuf .
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.El
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.Pp
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All other hook names are taken to be user hooks and correspond to an
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ATM endpoint as specified in the ATM Forum document.
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The interface on these hooks is defined in
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.In atmapi.h
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and uses a structure
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.Bd -literal
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struct ccatm_op {
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u_int32_t op; /* request code */
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u_char data[]; /* optional data */
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};
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.Ed
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.Pp
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This structure is followed directly by the data for the operation.
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The opcode is one of the following:
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.Bd -literal
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enum atmop {
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ATMOP_RESP,
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ATMOP_ABORT_CONNECTION,
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ATMOP_ACCEPT_INCOMING_CALL,
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ATMOP_ADD_PARTY,
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ATMOP_ADD_PARTY_REJECT,
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ATMOP_ADD_PARTY_SUCCESS,
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ATMOP_ARRIVAL_OF_INCOMING_CALL,
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ATMOP_CALL_RELEASE,
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ATMOP_CONNECT_OUTGOING_CALL,
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ATMOP_DROP_PARTY,
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ATMOP_GET_LOCAL_PORT_INFO,
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ATMOP_P2MP_CALL_ACTIVE,
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ATMOP_P2P_CALL_ACTIVE,
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ATMOP_PREPARE_INCOMING_CALL,
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ATMOP_PREPARE_OUTGOING_CALL,
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ATMOP_QUERY_CONNECTION_ATTRIBUTES,
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ATMOP_REJECT_INCOMING_CALL,
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ATMOP_SET_CONNECTION_ATTRIBUTES,
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ATMOP_WAIT_ON_INCOMING_CALL,
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ATMOP_SET_CONNECTION_ATTRIBUTES_X,
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ATMOP_QUERY_CONNECTION_ATTRIBUTES_X,
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ATMOP_QUERY_STATE
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};
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.Ed
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.Pp
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These codes correspond directly to the operations specified in the ATM
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Forum document with the following exceptions:
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.Bl -tag -width indent
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.It Dv ATMOP_RESP
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As discussed in
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.Xr ng_uni 4 ,
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this is used to
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.Dq synchronify
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the interface.
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The argument is a
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.Bd -literal
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struct atm_resp {
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int32_t resp;
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uint32_t data; /* type of attached data */
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};
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.Ed
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.Pp
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If the response code
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.Va resp
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is zero, the node has accepted the user request.
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If something goes wrong,
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.Va resp
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contains an error code.
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For requests that return data,
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.Va data
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contains a code describing the type of data and the data itself
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starts immediately after the structure.
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.It Dv ATMOP_QUERY_CONNECTION_ATTRIBUTES_X
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This is the same as
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.Dv ATMOP_QUERY_CONNECTION_ATTRIBUTES
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except that it allows to query several attributes
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within one request.
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.It Dv ATMOP_SET_CONNECTION_ATTRIBUTES_X
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This is the same as
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.Dv ATMOP_SET_CONNECTION_ATTRIBUTES
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except that it allows to set several attributes
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within one request.
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The list of attributes is followed directly by the attributes in the same
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order as they appear in the list.
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.El
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.Pp
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If a user hook is disconnected, an active connection on that hook is released.
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Incoming connections waiting to be accepted are reoffered to other
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listening hooks or rejected.
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.Sh CONTROL MESSAGES
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Besides the generic messages the node understands the following special
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messages:
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.Bl -tag -width indent
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.It Dv NGM_CCATM_DUMP
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This causes the internal state of the node to be dumped in ASCII to the
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.Va dump
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hook.
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.It Dv NGM_CCATM_STOP
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This message causes all connections on that port to be aborted (not released!\&)
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and all ATM endpoints which are bound to that port to be closed.
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It stops processing of all messages from the UNI stack on that port UNI stack.
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The argument is a
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.Bd -literal
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struct ngm_ccatm_port {
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uint32_t port;
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};
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.Ed
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.Pp
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.It Dv NGM_CCATM_START
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Start processing on the port.
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The argument is a
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.Vt ngm_ccatm_port
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structure.
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.It Dv NGM_CCATM_CLEAR
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This message takes a
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.Vt ngm_ccatm_port
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structure and clears all prefixes and addresses on that port.
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If the port number is zero, all ports are cleared.
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.It Dv NGM_CCATM_GET_ADDRESSES
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Get the list of all registered addresses on the given port.
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The argument is a
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.Vt ngm_ccatm_port
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structure and the result is a
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.Vt ngm_ccatm_get_addresses
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structure:
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.Bd -literal
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struct ngm_ccatm_get_addresses {
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uint32_t count;
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struct ngm_ccatm_address_req addr[0];
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};
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struct ngm_ccatm_address_req {
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u_int32_t port;
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struct uni_addr addr;
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};
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.Ed
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.Pp
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If the
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.Va port
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field is zero in the request, all addresses on all ports
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are returned.
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If it is not zero, only the addresses on that port are reported.
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The number of addresses is returned in the
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.Va count
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field.
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.It Dv NGM_CCATM_ADDRESS_REGISTERED
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This message is used by ILMI to inform the
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.Nm
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node that a previous address registration request was successful.
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This causes the node to activate that address.
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The argument to the message is a
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.Vt ngm_ccatm_address_req
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structure.
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.It Dv NGM_CCATM_ADDRESS_UNREGISTERED
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This message is used by ILMI to inform the
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.Nm
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node that an address has been unregistered.
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The node clears that address from its tables.
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The argument is a
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.Vt ngm_ccatm_address_req
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structure.
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.It Dv NGM_CCATM_SET_PORT_PARAM
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This request sets the parameters on the given port.
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The argument is a
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.Bd -literal
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struct ngm_ccatm_atm_port {
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uint32_t port; /* port for which to set parameters */
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uint32_t pcr; /* port peak cell rate */
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uint32_t max_vpi_bits;
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uint32_t max_vci_bits;
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uint32_t max_svpc_vpi;
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uint32_t max_svcc_vpi;
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uint32_t min_svcc_vci;
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uint8_t esi[6];
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uint32_t num_addr;
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};
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.Ed
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.Pp
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This should be used only by ILMI and when that port is stopped and the
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address and prefix tables of that port are empty.
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The
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.Va num_addr
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field is ignored.
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.It Dv NGM_CCATM_GET_PORT_PARAM
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Retrieve the parameters of the given port.
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The argument is a
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.Vt ngm_ccatm_port
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and the result a
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.Vt ngm_ccatm_atm_port .
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.It Dv NGM_CCATM_GET_PORTLIST
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Get a list of all available ports on that node.
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This is returned as a
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.Bd -literal
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struct ngm_ccatm_portlist {
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uint32_t nports;
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uint32_t ports[];
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};
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.Ed
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.It Dv NGM_CCATM_GETSTATE
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Return the state of a port.
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The argument is a
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.Vt "struct ngm_ccatm_port"
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and the return values as a
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.Vt uint32_t .
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.It Dv NGM_CCATM_SETLOG
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This requests sets a new logging level and returns the previous one.
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The argument is either a
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.Vt uint32_t
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in which case it specifies the new logging level, or may be empty
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in which case just the old level is returned as a
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.Vt uint32_t .
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.It Dv NGM_CCATM_RESET
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Reset the node.
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This is allowed only if the number of user hooks and connected UNI stacks is
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zero.
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.It Dv NGM_CCATM_GET_EXSTAT
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Return extended status information from the node.
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.El
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.Sh SEE ALSO
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.Xr netgraph 4 ,
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.Xr ng_uni 4 ,
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.Xr ngctl 8
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.Sh AUTHORS
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.An Harti Brandt Aq harti@FreeBSD.org
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