[Devel] New Feature: Supported methods and lookup

[Klaus Darilion]

Hi Bogdan!

regardin the example:
case -3: is not defined as return value, looks like a typo

klaus

Bogdan-Andrei Iancu wrote:
> Hi,
> 
> based on Juha's patch - saving in usrloc the supported methods 
> advertised during REGISTER - I extended lookup() function to perform 
> method based filtering. What this means: lookup() may return only 
> contacts which supports the method of the processed request.
> 
> Ex: there are two clients registering as same user:
>    1) a SIP phone which support INVITE & family, but no presence and 
> messaging.
>    2) a soft messaging client : supports only MESSAGE
> When a call hits the server, the lookup() will send it only to contact 
> (1), to the phone, since the contact (2) does not support INVITE. When a 
> MESSAGE hits the server, the lookup() will send it only to contact (2), 
> to the soft client, since the contact (1) does not support MESSAGE.
> 
> 
> the advantage is that you avoid un-necessary parallel forking and extra 
> signalling. Also there are SIP implementation which does not even reply 
> to methods they are not supporting, forcing the proxy to generate 
> timeout..:(
> 
> 
> The feature may be turned on or off via the module parameter 
> "method_filtering":
>       http://www.openser.org/docs/modules/1.1.x/registrar.html#AEN247
> 
> For more, see also the script snapshot from :
>       http://www.openser.org/docs/modules/1.1.x/registrar.html#AEN288
> 
> 
> regards,
> bogdan
>     
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