[Devel] New Feature: Supported methods and lookup

[Bogdan-Andrei Iancu]

Hi Klaus,

not sure I get it - you say -3 is never returned by function? or?

regards,
bogdan

Klaus Darilion wrote:

> 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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>