[Nut-upsdev] DNS-SD (was Re: [nut-commits] svn commit r2974 - branches/nut-scanner/tools/nut-scanner)

Arnaud Quette aquette.dev at gmail.com
Thu Apr 21 07:51:57 UTC 2011

forgotten side note:
I've not been much following SLP (Service Location Protocol) recently, which
is the IETF standard, being somehow superceeded by mDNS / DNS-SD.
it could be worth to have a look at OpenSLP (http://www.openslp.org) to also
provide an implementation for this one too.


2011/4/20 Arnaud Quette <aquette.dev at gmail.com>

> damn, I forgot the attachment!
> fixed.
> 2011/4/20 Arnaud Quette <aquette.dev at gmail.com>
>> 2011/4/20 Charles Lepple <clepple at gmail.com>
>>> On Apr 19, 2011, at 10:26 AM, Arnaud Quette wrote:
>>>  what still puzzles me is that "_upsd._tcp" is used as Service Type.
>>>> while "nut" is used as the Service Name.
>>>> (instant update) I've just made a quick test with Frédéric, and the
>>>> "nut" name *must* be unique: each system that publish a nut service
>>>> availability has to have a unique Service Name!
>>> It looks like the convention is to use the hostname or MAC address to
>>> make the DNS-SD name unique. "man avahi.services" mentions a "%h" format
>>> specifier and an XML attribute to insert the local hostname.
>> right, thanks for these info Charles.
>> note that service files also use a friendly name like "Printer on %h".
>> In light of this, I've shaped up the attachment.
>> The things I'd probably like to add in <txt-record> are:
>> - running mode (ie none, standalone, netserver, netclient)
>> - (optional) NUT protocol version or at least NUT version (can use
>> - (optional) security mode
>> But service files are not suitable for this, conversely to the
>> avahi-publish call.
>> I need to have more use cases, but the idea is to be able to select (ie
>> filter on):
>> - non configured instances, to configure these
>> - instance types, like netserver for netclient configuration
>> If you have ideas in mind related to that, I'm all hears.
>> cheers,
>> Arnaud
>> --
>> Linux / Unix Expert R&D - Eaton - http://powerquality.eaton.com
>> Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/
>> Debian Developer - http://www.debian.org
>> Free Software Developer - http://arnaud.quette.free.fr/
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