Re: [Openslp-users] How to use the lifetime parameter

[John C. <joh...@gm...>]

The user agent (advertising application) is responsible for doing a refresh. This feature exists so that if the service crashes the advertisement will disappear within a reasonable time.

John


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<div>-------- Original message --------</div><div>From: Alois Mahdal <am...@re...> </div><div>Date:07/30/2014  12:57 PM  (GMT-07:00) </div><div>To: ope...@li... </div><div>Subject: [Openslp-users] How to use the lifetime parameter </div><div>
</div>Hi,

I've been wondering: what is the use case of the "lifetime"
in SLP?

RFC says:

> Clients indicate that they want URLs to be automatically
> refreshed by setting the usLifetime parameter in the SLPReg()
> function call to SLP_LIFETIME_MAXIMUM. This will cause the API
> implementation to refresh the URL before it times out. 

Say I have a SA that provides service x, and it dynamically
registers for 300s.  So far it seems this means that service is
likely to disappear after 5 minutes.  OK, but the spec speaks
about refreshing:  who will do the refreshing?

Can a good soul shed some light on this?

Another example, I have a static registration with this record
in /etc/slp.reg:

    sevice:http://myservice/,en,10000

what does that mean?  From what I've read I understand that
setting this to 65535 will have the service registration last
forever (until slpd exits).

But why would I want to use anything else?

Thanks,
aL.

-- 
Alois Mahdal <am...@re...>
Platform QE Engineer at Red Hat, Inc.
#brno, #daemons, #openlmi

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