distributed GSM / some thoughts

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Harald Welte laforge at osmocom.org
Wed Dec 4 19:50:33 UTC 2019


Hi Neels,

On Wed, Dec 04, 2019 at 02:52:06PM +0100, Neels Hofmeyr wrote:
> On Tue, Dec 03, 2019 at 05:20:33PM +0100, Harald Welte wrote:
> > == DNS zone / .msisdn suffix ===
> > 
> > .{msisdn,imsi}.dgsm.osmocom.org ?  Sure, the packets will get larger by
> 
> sure, we can do that.  An idea is to do that merely on the DNS encoding, and
> strip it off to have only *.imsi in the mslookup client? (If we add other
> methods, we might not use the domain kind of representation at all there)

good idea.  It could also be a global config setting somewhere of whatever suffix
is added after the .imsi/.msisdn, defaulting to the osmocom example.

> We haven't tested this at all.
> Should become an issue on redmine.

Will you create them accordingly?  As indicated, I think it's [at least] two differen
levels;
a) ensuring that keepalive on either TCP or IPA is enabled and works, and
b) creating situations where the same peer establishes a second new connection
   while the old one is still not torn down (timeout not expired yet, FIN packets
   lost, ...)

-- 
- Harald Welte <laforge at osmocom.org>            http://laforge.gnumonks.org/
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