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Name

linxdisc - The LINX discovery daemon

Synopsis

linxdisc [-d] [-c config-file ] [-r retries ]

Description

linxdisc is the LINX discovery daemon, which automatically detects and creates connections (links) to other remote LINX nodes, which also is running linxdisc. The daemon periodically sends advertisements and waits for advertisements from remote nodes. The period is about 3 seconds. Connections are created to allowed remote nodes, when advertisements are received.

See the configuration file linxdisc.conf(5) for filter rules, limiting which interfaces to use and which remote nodes to allow. Communication links are only allowed to remote nodes which advertise the same LINX network cluster name as configured and with a node name fulfilling the configured allow/deny rules. The configured LINX cluster name and node name are used in advertisements sent from this node. The cluster name and node name must be unique.

The advertised node name is the suggested linkname to use for links to the advertised node. The linkname is used in huntname paths by applications in other nodes, when they hunt for LINX endpoints in this node.

linxdisc must be run as root and there can only be one instance of linxdisc running on each node. When linxdisc catches a SIGHUP, the configuration will be reread. Use SIGTERM to terminate linxdisc. When linxdisc terminates, all connections are automatically destroyed.

The linxdisc protocol is described in detail in the Linx Protocol document (see http://linx.sourceforge.net).

Options

-d
Run in debug mode. The program is interactive, not run as a daemon, and all progress and activity is logged to standard error.

-c config-file
Use config-file instead of the default configuration file /etc/linxdisc.conf.

Files

/etc/linxdisc.conf
The default configuration file. See linxdisc.conf(5) for further details.

Diagnostics

linxdisc writes all activity and errors to the syslog, unless the -d option was given.

Known Bugs and Limitations

linxdisc cannot apply parameters such as timeouts etc when creating links. Interfaces that are unavailable when starting linxdisc will not be used when they become available, linxdisc has to be restarted in that case.

See Also

linx(7) , linx_hunt(3) , linxdisc.conf(5)

Author

Enea LINX team

Copyright

Copyright (c) 2006-2007, Enea Software AB All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of Enea Software AB nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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