[Kamailio-Devel] [OpenSIPS-Devel] pua callback

[Anca Vamanu]

Hi Sebastian,

As Klaus said, you should not keep the etag to ensure that the state is 
updated, but provide the same id and pua module will take care of that.
If you however, do want get the etag or the expires from the answer in 
your module, you have to register a callback in pua module to be called 
when the reply for the message you triggered is received.

For this, you have to register the callback in mod_init, as it is done 
in modules/pua_mi/pua_mi.c file:

    if(pua.register_puacb(SCRIPT_PUBLISH, scr_publ_rpl_cback, NULL)< 0)
    {
        LM_ERR("Could not register callback\n");
        return -1;
    }   
where SCRIPT_PUBLISH should be a new type of source generating messages, 
that has to be defined in pua module.
And then define the scr_publ_rpl_callback which has the prototype:
int scr_publ_rpl_cback( ua_pres_t* hentity, struct sip_msg* reply);
The first parameter is a structure with infos about the presentity and 
the second is the reply message.

regards,
Anca Vamanu


Klaus Darilion wrote:
> Hi Sebastian!
>
> In the presence_dialoginfo module I do not care about the etag. The pua 
> module stores the etag itself and reuses it for further presence requests.
>
> (I think it is based on the publ->id which should be constant for 
> "in-dialog" requests. Further, the type must be set to the update type: 
> publ->flag|= UPDATE_TYPE;)
>
> regards
> klaus
>
> Schumann Sebastian schrieb:
>   
>> Dear all
>>  
>> I wrote a module using the pua module api to send presence messages 
>> directly from the script and it all works fine. I have only problems to 
>> use the ETag from the answer, I can somehow not process the answer at 
>> all. I tried to look at pua_mi and other pua modules but cannot see any 
>> light there how to process the answer. I know pua callback does it but 
>> do not know how, I am lost within the structures.
>>  
>> It is important though because otherwise if a publish is sent and the 
>> state is updated, there is no acutal update but two presence states from 
>> one client.
>>  
>> Can someone (Anca?) help me and provide some more info about the proper 
>> use of PUA to process the answer and E-Tag respectively properly?
>>  
>> Thanks a lot!
>>  
>> Sebastian
>>
>>
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