/dev/isdnctrl
is a character device with major number
45
and minor numbers
64 to 127.
It allows controlling functionality of the Linux
ISDN
subsystem.
IOCTL FUNCTIONS
Currently, the following ioctl calls are supported:
IIOCNETAIF
Add an
ISDN
network interface.
This function adds a network interface to the kernel's device table.
This interface can be used just like normal eth interfaces.
Argument:
arg
should point to a zero terminated string of max. 10 characters.
if
arg
is NULL, the kernel assigns a name.
Return:
On success, the name of the new interface is copied to
arg.
and the call returns 0. On failure, an error code is returned.
IIOCNETASL
Create a slave interface.
Creates a slave interface for RAW-device channel-bundling.
These devices behave like network-interfaces, execpt they
are invisible to user. Only
ISDN
parameters can be controlled, but no IP-parameters. IP-parameters
are inherited from the corresponding master-device.
Argument:
arg
should point to a zero terminated string of max. 21 characters
containing two comma-separated names. The first part is the name
of an existing
ISDN
network device, which will be master. The second part will be the
name of the new slave interface.
Return:
On success, the name of the new interface is copied to
arg.
and the call returns 0. On failure, an error code is returned.
IIOCNETDIF
Delete a network-interface.
This call deletes an existing
ISDN
network interface.
Argument:
arg
should point to a zero terminated string of max. 10 characters
naming an existing interface which will be deleted. If the interface
is a master interface, all it's slave-interfaces will be deleted also.
Return:
On success, the call returns 0. On failure, an error code is returned.
IIOCNETSCF
Set configurable parameters of an
ISDN
network interface.
This call replaces all
ISDN
related parameters of an interface by the parameters given.
Argument:
arg
shoud point to a
struct isdn_net_ioctl_cfg
(defined in linux/isdn.h)
Return:
On success, the call returns 0. On failure, an error code is returned.
IIOCNETGCF
Get configurable parameters of an
ISDN
network interface.
This call returns all
ISDN
related parameters of an interface.
Argument:
arg
shoud point to a
struct isdn_net_ioctl_cfg
(defined in linux/isdn.h) which will be filled by the current setup.
Return:
On success, the call returns 0 and the interface-setup is copied to
*arg. On failure, an error code is returned.
IIOCNETANM
Add a phone number to an
ISDN
network interface.
This call adds a phone number to an existing network interface.
Argument:
arg
shoud point to a
struct isdn_net_ioctl_phone
which contains necessary information.
Return:
On success, the call returns 0 and the phone number is added to
either outgoing or incoming number list. On failure, an error code is returned.
IIOCNETDNM
Delete a phone number from an
ISDN
network interface.
This call deletes a phone number from an existing network interface.
Argument:
arg
shoud point to a
struct isdn_net_ioctl_phone
which contains necessary information.
Return:
On success, the call returns 0 and the phone number is deleted from
either outgoing or incoming number list. On failure, an error code is returned.
IIOCNETGNM
Get list of phone numbers from an
ISDN
network interface.
This call returns the list of phone numbers associated to an existing
network interface.
Argument:
arg
shoud point to a a union of
struct isdn_net_ioctl_phone
and a buffer, large enough to hold a concatenated list of
strings containing the phone numbers.
Return:
On success, the call returns 0 and the list of phone numbers is
returned as a space-separated list of number-strings terminated by a
NULL byte.
IIOCNETDIL
Trigger dialing of an
ISDN
network interface.
This call initiates dialing of an
ISDN
network interface, if it is not connected. Normally, this ioctl is not
needed, because
ISDN
network interface perform dial on demand by deafult.
Argument:
arg
should point to a zero terminated string of max. 10 characters naming
the desired interface.
Return:
On success, the call returns 0 and the interface starts dialing.
IIOCNETHUP
Hangup an
ISDN
network interface.
This call initiates hangup of an
ISDN
network interface, if it is connected.
Argument:
arg
should point to a zero terminated string of max. 10 characters naming
the desired interface.
Return:
On success, the call returns 0 and the interface hangs up.
IIOCNETALN
Add a link of an MPP-configured
ISDN
network interface.
This call initiates dialing of a Multilink-PPP slave
ISDN
network interface, if it is not connected.
Argument:
arg
should point to a zero terminated string of max. 10 characters naming
the desired interface.
Return:
On success, the call returns 0 and the interface starts dialing.
IIOCNETDLN
Hangup an MPP-configured
ISDN
network interface.
This call initiates hangup of an Multilink-PPP
ISDN
network interface, if it is connected.
Argument:
arg
should point to a zero terminated string of max. 10 characters naming
the desired interface.
Return:
On success, the call returns 0 and the interface hangs up.
IIOCNETARU
Add a timeout rule to an
ISDN
network interface.
This call adds a timeout rule to an existing interface.
Argument:
arg
should point to a
struct isdn_ioctl_timeout_rule
containing the necessary parameters.
Return:
On success, the call returns 0 and the rule is added to the
rule list of the interface.
IIOCNETDRU
Delete a timeout rule from an
ISDN
network interface.
This call deletes a timeout rule from an existing interface.
Argument:
arg
should point to a
struct isdn_ioctl_timeout_rule
containing the necessary parameters.
Return:
On success, the call returns 0 and the rule is deleted from the
rule list of the interface.
IIOCNETGRU
Get a timeout rule from an
ISDN
network interface.
This call returns a timeout rule from an existing interface.
Argument:
arg
should point to a
struct isdn_ioctl_timeout_rule
containing the necessary parameters.
Return:
On success, the call returns 0 and the struct is filled from the
rule list of the interface.
IIOCNETBUD
Handle budget accounting of an
ISDN
network interface.
Argument and Return:
to be defined.
IIOCSETVER
Set verbosity of link level.
Argument:
arg
is an integer, defining the new verbose value.
Return:
This call always returns 0.
IIOCSETGST
Set global stop flag of link level.
Argument:
arg
is an integer, defining the new stop flag value (0 or !0).
Return:
This call always returns 0.
IIOCSETBRJ
Set busreject flag of a lowlevel driver.
Argument:
arg
should point to an
struct isdn_ioctl_struct
containing the driver's ID and the value of the busreject flag.
Return:
On success, the call returns 0 and the busreject flag of the selected
driver is set according the given parameter.
IIOCSIGPRF
Enable signaling on change of modem profiles.
With this call, the calling process is registered to receive
a SIGIO on every change of any register of any ttyI. Thus it can
read register settings and save them to a file. The calling process
has to keep the device open in order to receive notifications.
As soon as it closes the device, registration is deleted.
Argument:
none
Return:
This call always returns 0.
IIOCGETPRF
Get all modem register settings.
With this call, all modem registers of all ttyI devices can be
read.
Argument:
arg
should point to a buffer of length
( ISDN_MODEM_ANZREG + ISDN_MSNLEN ) * ISDN_MAX_CHANNELS.
Return:
On return, the provided buffer is filled with the register values.
IIOCSETPRF
Set all modem register settings.
With this call, all modem registers of all ttyI devices can be
written.
Argument:
arg
should point to a buffer of length
( ISDN_MODEM_ANZREG + ISDN_MSNLEN ) * ISDN_MAX_CHANNELS.
filled with the values of all modem registers.
Return:
On return, the modem registers are set from the contents of the
provided buffer.
IIOCSETMAP
Set Mapping table.
This call is used to set EAZ/MSN mapping of a lowlevel driver.
Argument:
arg
should point to a
struct isdn_ioctl_struct
containing the necessary parameters.
Return:
On success, the mapping table is set from the given parameters
an the call returns 0.
IIOCGETMAP
Get Mapping table.
This call is used to get EAZ/MSN mapping of a lowlevel driver.
Argument:
arg
should point to a
struct isdn_ioctl_struct
containing the necessary parameters.
Return:
On success, the current mapping table of the given driver is returned
and the call returns 0.
IIOCDRVCTL
Lowlevel driver ioctl.
This call is used for controlling various lowlevel drivers. The
ioctl-code for this command is assembled by adding IIOCDRVCTL (128)
and the desired driver ioctl-code. Therefore, a lowlevel driver
can understand a maximum of 127 different ioctls.
Argument:
arg
should point to a
struct isdn_ioctl_struct
containing the necessary parameters, especially the driver-Id must be
filled correctly. The arg component inside isdn_ioctl_struct is
handed down to the driver's ioctl function. Its meaning is not
defined here and depends on the lowlevel driver. See documentation
for the various lewlevel drivers for information about driver-
specific ioctl.
Return:
The return code depends on the driver's ioctl function. Usually,
0 means no error.
