MirBSD manpage: isdnd(8)

ISDND(8)                 BSD System Manager's Manual                  ISDND(8)


     isdnd - isdn4bsd ISDN connection management daemon


     isdnd [-c configfile] [-d debuglevel] [-f] [-F] [-l] [-L logfile] [-P]
           [-r device] [-s facility] [-t terminaltype] [-u charging unit
           length] [-m]


     isdnd is the isdn4bsd package demon which manages all ISDN related con-
     nection and disconnection of ISDN devices supported by the package.

     The options are as follows:

     -c      Use configfile as the name of the runtime configuration filename
             for isdnd instead of the default file /etc/isdn/isdnd.rc.

     -d      If debugging support is compiled into isdnd this option is used
             to specify the debugging level, or better which kind of debugging
             messages are displayed. The debugging level is the sum of the
             following values:

                   0x001   general debugging.
                   0x002   rates calculation.
                   0x004   timing calculations.
                   0x008   state transitions.
                   0x010   retry handling.
                   0x020   dialing.
                   0x040   process handling.
                   0x080   isdn4bsd kernel i/o calls.
                   0x100   controller and channel busy/free messages.
                   0x200   isdnd.rc configuration file processing.
                   0x400   outgoing call budget handling.

             The value can be specified in any number base supported by the
             sscanf(3) library routine.

             In addition, this option accepts also the character 'n' as an ar-
             gument to disable displaying debug messages on the full-screen

     -f      Specifying this option causes isdnd to enter the full-screen mode
             of operation. When operating in this mode, entering the control
             character Control-L causes the display to be refreshed and enter-
             ing Carriage-Return or Enter will pop-up a command window. Be-
             cause the isdnd daemon will not listen to messages while the com-
             mand window is active, this command window will disappear au-
             tomatically after 5 seconds without any command key press.

             While the command window is active, Tab or Space advances to the
             next menu item. To execute a command, press Return or Enter for
             the highlighted menu item, or enter the number corresponding to
             the item to be executed or enter the capitalized character in the
             menu item description.

     -l      If this option is set, logging is not done via the syslogd(8) fa-
             cility but instead is appended to a file.

     -L      Specifies the name of the logfile which is used when the option
             -l is set. See also the keyword rotatesuffix in the system sec-
             tion of isdnd.rc(5).

     -P      This option prints out the parsed and verified isdnd configura-
             tion in the same format as the isdnd.rc file. This output can be
             used as an isdnd.rc file. This feature is especially useful when
             debugging an isdnd.rc file to see what the default settings of
             options are when they are not set in the isdnd.rc input file.

             The isdnd exits after the printout is done.

     -F      This option prevents isdnd to detach from the controlling tty and
             become a daemon.

     -r      In conjunction with the -t option, device specifies a terminal
             device which becomes the controlling tty for isdnd and on which
             the full-screen mode output is displayed.

     -s      This option may be used to specify the logging facility in case
             syslog(3) logging is configured and another facility than the de-
             fault LOCAL0 facility shall be used. The facility is to be speci-
             fied as an integer in the range 0-11 or 16-23 (see the file

     -t      In conjunction with the -f and -r options, terminaltype specifies
             a terminal type or termcap entry name (such as vt220) for the
             device used for isdnd full-screen output. This is useful if an
             unused (no getty running) tty line is used for full-screen output
             for which no TERM environment variable exists.

     -u      Specifies the length of a charging unit in case the config file
             entry keyword unitlengthsrc is set to cmdl.

     -m      If the ISDN daemon is compiled with local or remote monitoring
             support, this option disables all monitoring access. It overrides
             the config file option monitor-allowed.


     isdnd communicates with the kernel part of isdn4bsd by receiving status
     and event messages (via read(2) from device /dev/i4b) and by transmitting
     commands and responses (via ioctl(2) on device /dev/i4b).

     The messages and message parameters are documented in the include file

     Supported command and response messages (ioctl's) to the kernel are:
                   Request a unique Call Description IDentifier (cdid) which
                   identifies uniquely a single interaction of the local D
                   channel with the exchange.
                   Actively request a call setup to a remote ISDN subscriber.
                   Respond to an incoming call, either accept, reject or ig-
                   nore it.
                   Actively terminate a connection.
                   Request information about an installed ISDN controller
                   Give information about call setup to driver who requested
                   dialing out.
                   Update the kernels timeout value(s) in case of dynamically
                   calculated shorthold mode timing changes.
                   Inform the kernel userland drivers about interface soft
                   up/down status changes.
                   Download firmware to active card(s).
                   Return diagnostic information from active cards.

     Supported status and event messages from the kernel are:
                   An incoming call from a remote ISDN user is indicated.
                   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.
                   A call was terminated.
                   A userland interface driver requests the daemon to dial out
                   (typically a network interface when a packet arrives in its
                   send queue).
                   A call was terminated by the isdn4bsd kernel driver because
                   a B-channel idle timeout occurred.
                   Accounting information from a network driver.
                   Charging information from the kernel.


     Currently the only possibility to trigger an outgoing call is that an
     isdn4bsd network driver (isdn<n>) sends a MSG_DIALOUT_IND to the isdnd

     The daemon requests a new CDID from the kernel by using the I4B_CDID_REQ
     ioctl message, this CDID is now used in all interactions with the kernel
     to identify this single call until a disconnect occurs.

     After getting the CDID, the daemon looks up several additional informa-
     tion in its entry section of the configuration corresponding to that con-
     nection and issues a I4B_CONNECT_REQ ioctl message to the kernel. The
     kernel now dials the remote side and if the remote side accepts the call,
     the kernel sends a MSG_CONNECT_ACTIVE_IND to the daemon.

     The call is terminated by either the local site timing out or the remote
     side hanging up the connection or the local side actively sending a
     I4B_DISCONNECT_REQ ioctl message, both events are signaled to the isdnd
     by the kernel sending the I4B_DISCONNECT_IND message and the CDID
     corresponding to the call is no longer valid.


     Incoming calls are signaled to isdnd by the kernel transmitting the
     MSG_CONNECT_IND message to the daemon.

     With the information contained in this message, isdnd searches the entry
     section of its configuration database and if a match is found, it accepts
     or rejects the call or, if no match is found, it ignores the call - all
     by issuing a I4B_CONNECT_RESP ioctl message with the appropriate parame-
     ters to the kernel.

     In case the daemon decided to accept the call, the kernel signals this by
     sending a MSG_CONNECT_ACTIVE_IND message to the daemon.

     The call is terminated by either the local site timing out or the remote
     side hanging up the connection or the local side actively sending a
     I4B_DISCONNECT_REQ ioctl message, both events are signaled to isdnd by
     the kernel sending the I4B_DISCONNECT_IND message and the CDID
     corresponding to the call is no longer valid.


     Sending a HUP signal to isdnd causes all open connections to be terminat-
     ed and the configuration file is reread. In case aliasfile handling was
     enabled, the aliasfile is also reread.

     Sending a USR1 signal to isdnd causes the accounting file and the logfile
     (if logging to a file is used instead of logging via the syslog(3) facil-
     ity) to be closed and reopened to make logfile rotation possible.


     The following environment variables affect the execution of isdnd:

     TERM    The terminal type when running in full-screen display mode. See
             environ(7) for more information.


     /dev/i4b               The device-file used to communicate with the ker-
                            nel ISDN driver subsystem.
     /var/log/messages      A record of the actions in case of syslogd logging
     /var/log/isdnd.acct    The default accounting information filename (if
                            accounting is configured).
     /var/log/isdnd.log     The default logging filename (if logging to a file
                            is configured).
     /var/run/isdnd.pid     The process id of the ISDN daemon (also known as
                            "lockfile" to isdnd, preventing multiple invoca-
                            tions of it).
     /etc/isdn              The directory where isdnd expects some supplemen-
                            tary data files and programs for telephone answer-
                            ing support.
     /etc/isdn/isdnd.rc     The default runtime configuration file.
     /etc/isdn/isdnd.rates  The default unit charging rates specification
                            The default table (if aliasing is enabled) to con-
                            vert phone number to caller's name.


     For a first try, the following command should be used to start isdnd in
     foreground mode for better debugging the configuration setup:

           isdnd -d0xf9 -F

     This will start isdnd with reasonable debugging settings and produce out-
     put on the current terminal. isdnd can then be terminated by entering

     Another example, the command:

           isdnd -d0xf9 -f -r /dev/ttyv3 -t vt100

     will start isdnd with reasonable debugging messages enabled, full-screen
     mode of operation, full-screen display redirected to /dev/ttyv03 and us-
     ing a termcap entry for vt100 on this display.


     Exit status is 0 on success, 1 on error.


     ippp(4), irip(4), isdnd.rates(5), isdnd.rc(5), isdntel(8), isdntrace(8),


     The isdnd daemon and this manual page were written by Hellmuth Michaelis

MirBSD #10-current               May 2, 2000                                 3

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