I4B (4) | Special files and drivers | Unix Manual Pages

The messages and message parameters are documented in the include file /usr/include/machine/i4b_ioctl.h.

The most important 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 outgoing call has been accepted by a remote, the exchange signaled 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.

Created by Blin Media, 2008-2013