[Users] Natping in "dispatcher scenario"

[Klaus Darilion]

Andreas Granig wrote:
> Helge Waastad wrote:
>> Does anyone else find it interesting to have the ping also relayed via
>> the OBP?
>> If not, I just have to move the registrar more towards the frontend.
> 
> We ended up in implementing a simple stand-alone natping application for
> a proof-of-concept design using raw sockets for spoofing the OBP
> address, mainly for two reasons:

nice idea :-)

regards
klaus

> 
> - Performance: a possibility would be to evaluate the Path uri in the
> registrar and send a sip-based nat-ping (OPTION) with a pre-set route,
> but this would really stress the OBP (assume you've to ping 50.000 UACs
> every 60 seconds).
> 
> - Simplicity: it would require quite a lot of changes in
> registrar/usrloc/nathelper/mediaproxy, so we just query the
> received-column of usrloc from the external natping application(s) and
> send empty udp packets.
> 
> Patches to the registrar and a new path module for accomplishing this
> (inserting proper Path headers in an OBP, and taking the
> received-address from a Path uri parameter and saving it into usrloc in
> a registrar) will be contributed the next days...
> 
> Bye,
> Andy
> 
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