udpcluster(3tLightweight UDP based tool for cluster node discoudpcluster(3tcl)
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NAME
udpcluster - UDP Peer-to-Peer cluster
SYNOPSIS
package require Tcl 8.5
package require udpcluster ?0.3.3?
package require ip
package require nettool
package require comm
package require interp
package require dicttool
package require cron
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DESCRIPTION
This package is a lightweight alternative to Zeroconf. It utilizes UDP
packets to populate a table of services provided by each node on a lo-
cal network. Each participant broadcasts a key/value list in plain
UTF-8 which lists what ports are open, and what protocols are expected
on those ports. Developers are free to add any additional key/value
pairs beyond those.
Using udpcluster.
For every service you wish to publish invoke:
cluster::publish echo@[cluster::macid] {port 10000 protocol echo}
To query what services are available on the local network:
set results [cluster::search PATTERN]
# And inside that result...
echo@LOCALMACID {
port 10000
protocol echo
}
To unpublish a service:
cluster::unpublish echo@[cluster::macid]
Results will Historical Notes:
This tool was originally known as nns::cluster, but as development pro-
gressed, it was clear that it wasn't interacting with any of the other
facilities in NNS.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain
bugs and other problems. Please report such in the category nameserv
of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist]. Please
also report any ideas for enhancements you may have for either package
and/or documentation.
When proposing code changes, please provide unified diffs, i.e the out-
put of diff -u.
Note further that attachments are strongly preferred over inlined
patches. Attachments can be made by going to the Edit form of the
ticket immediately after its creation, and then using the left-most
button in the secondary navigation bar.
KEYWORDS
name service, server
CATEGORY
Networking
COPYRIGHT
Copyright (c) 2016-2018 Sean Woods <yoda@etoyoc.com>
tcllib 0.3.3 udpcluster(3tcl)