I4B(4) BSD Kernel Interfaces Manual I4B(4)NAMEi4b — isdn4bsd call control ISDN driver
SYNOPSIS
pseudo-device "i4b"
DESCRIPTION
The i4b device driver is used by the isdnd(8) daemon to exchange messages
with the isdn4bsd kernel part for the purpose of call establishment, con‐
trol and disconnection and to access various control and status informa‐
tion.
The messages and message parameters are documented in the include file
<i4b_machine/i4b_ioctl.h>.
The available ioctl's are:
I4B_CDID_REQ
Request a unique Call Description IDentifier (cdid) which
identifies uniquely a single interaction of the local D
channel with the exchange.
I4B_CONNECT_REQ
Actively request a call setup to a remote ISDN subscriber.
I4B_CONNECT_RESP
Respond to an incoming call, either accept, reject or
ignore it.
I4B_DISCONNECT_REQ
Actively terminate a connection.
I4B_CTRL_INFO_REQ
Request information about an installed ISDN controller
card.
I4B_DIALOUT_RESP
Give information about call setup to driver who requested
dialing out.
I4B_TIMEOUT_UPD
Update the kernels timeout value(s) in case of dynamically
calculated shorthold mode timing changes.
I4B_UPDOWN_IND
Inform the kernel userland drivers about interface soft
up/down status changes.
I4B_CTRL_DOWNLOAD
Download firmware to active card(s).
I4B_ACTIVE_DIAGNOSTIC
Return diagnostic information from active cards.
Status and event messages available from the kernel are:
MSG_CONNECT_IND
An incoming call from a remote ISDN user is indicated.
MSG_CONNECT_ACTIVE_IND
After an incoming call has been accepted locally or an out‐
going call has been accepted by a remote, the exchange sig‐
naled an active connection and the corresponding B-channel
is switched through.
MSG_DISCONNECT_IND
A call was terminated.
MSG_DIALOUT_IND
A userland interface driver requests the daemon to dial out
(typically a network interface when a packet arrives in its
send queue).
MSG_IDLE_TIMEOUT_IND
A call was terminated by the isdn4bsd kernel driver because
a B-channel idle timeout occurred.
MSG_ACCT_IND
Accounting information from a network driver.
MSG_CHARGING_IND
Charging information from the kernel.
SEE ALSOisdnd(8)AUTHORS
The i4b device driver and this manpage were written by Hellmuth Michaelis
⟨hm@kts.org⟩.
BSD February 3, 1998 BSD
