[avahi] Is it possible to customize "#define AVAHI_DEFAULT_TTL_HOST_NAME" and "#define AVAHI_DEFAULT_TTL", rather than embedding them "statically" in the code?

[Ajay Garg]

On Tue, Jul 10, 2012 at 4:55 AM, Patrick Oppenlander <pattyo.lists at gmail.com
> wrote:

>  On 05/07/12 20:19, Ajay Garg wrote:
>
> Hi all.
>
> I ran into a issue, as described at
> https://bugs.freedesktop.org/show_bug.cgi?id=51501
>
>
> This behaviour is not a bug. It's a side-effect of how MDNS is
> (intentionally) designed.
>
> Your bug report states that the callback is not called. It will in fact be
> called, it just takes a long time.
>


Yes, I think it would.
But the callback is not called after 120 seconds. May be after 75 minutes..
but I haven't waited that long enough :)

Also, as per
https://tools.ietf.org/html/draft-cheshire-dnsext-multicastdns-15#section-10,
the standard says that the timeout is expected to be 120 seconds.

So, at least making
                                 #define AVAHI_DEFAULT_TTL_HOST_NAME
                                 #define
AVAHI_DEFAULT_TTL

configurable (and not hard-coded), would make it more convenient for
personal customizations.


Just my 2 cents :)



Thanks and Regards,
Ajay






>
>
>
> I followed these steps ::
>
> a)
> I changed the values to
>
>                                  #define AVAHI_DEFAULT_TTL_HOST_NAME (20)
>                                  #define
> AVAHI_DEFAULT_TTL                       (20)
>
>
> This is a pretty bad idea as these records will need to be refreshed at 17
> second intervals.
>
> Some people already consider mDNS to be a "chatty" protocol [1]. This kind
> of thing just exacerbates the problem.
>
>         Patrick
>
> [1] http://www.net.princeton.edu/filters/mdns.html
>
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