111 lines
4.0 KiB
Groff
111 lines
4.0 KiB
Groff
.\"
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.\" Copyright (c) 1997, 2002 Hellmuth Michaelis. All rights reserved.
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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 THE 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 THE 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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.\" last edit-date: [Sun Jul 28 12:07:13 2002]
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.\"
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.Dd July 5, 2007
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.Dt I4B 4
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.Os
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.Sh NAME
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.Nm i4b
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.Nd isdn4bsd call control ISDN driver
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.Sh SYNOPSIS
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.Cd device \&"i4b\&"
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.Sh DESCRIPTION
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The
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.Nm
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device driver is used by the
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.Xr isdnd 8
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daemon to exchange messages with the isdn4bsd kernel part for the purpose
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of call establishment, control and disconnection and to access various
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control and status informations.
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The
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.Nm
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device can only be opened by a single process and is not meant to be used
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by user programs.
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.Pp
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The messages and message parameters are documented in the include
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file
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.Em /usr/include/i4b/i4b_ioctl.h .
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.Pp
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The most important available ioctl's are:
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.Pp
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.Bl -tag -width Ds -compact -offset indent
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.It Ar I4B_CDID_REQ
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Request a unique Call Description IDentifier (cdid) which identifies
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uniquely a single interaction of the local D channel with the exchange.
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.It Ar I4B_CONNECT_REQ
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Actively request a call setup to a remote ISDN subscriber.
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.It Ar I4B_CONNECT_RESP
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Respond to an incoming call, either accept, reject or ignore it.
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.It Ar I4B_DISCONNECT_REQ
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Actively terminate a connection.
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.It Ar I4B_CTRL_INFO_REQ
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Request information about an installed ISDN controller card.
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.It Ar I4B_DIALOUT_RESP
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Give information about call setup to driver who requested dialing out.
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.It Ar I4B_TIMEOUT_UPD
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Update the kernels timeout value(s) in case of dynamically calculated
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shorthold mode timing changes.
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.It Ar I4B_UPDOWN_IND
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Inform the kernel userland drivers about interface soft up/down status
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changes.
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.It Ar I4B_CTRL_DOWNLOAD
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Download firmware to active card(s).
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.It Ar I4B_ACTIVE_DIAGNOSTIC
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Return diagnostic information from active cards.
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.El
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.Pp
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Status and event messages available from the kernel are:
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.Pp
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.Bl -tag -width Ds -compact -offset indent
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.It Ar MSG_CONNECT_IND
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An incoming call from a remote ISDN user is indicated.
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.It Ar MSG_CONNECT_ACTIVE_IND
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After an incoming call has been accepted locally or an outgoing call has
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been accepted by a remote, the exchange signaled an active connection
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and the corresponding B-channel is switched through.
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.It Ar MSG_DISCONNECT_IND
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A call was terminated.
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.It Ar MSG_DIALOUT_IND
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A userland interface driver requests the daemon to dial out (typically a
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network interface when a packet arrives in its send queue).
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.It Ar MSG_IDLE_TIMEOUT_IND
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A call was terminated by the isdn4bsd kernel driver because a B-channel
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idle timeout occurred.
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.It Ar MSG_ACCT_IND
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Accounting information from a network driver.
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.It Ar MSG_CHARGING_IND
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Charging information from the kernel.
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.El
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.Sh SEE ALSO
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.Xr isdnd 8
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.Sh AUTHORS
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The
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.Nm
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device driver and this manpage were written by
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.An Hellmuth Michaelis Aq hm@FreeBSD.org .
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