[SR-Users] Unregister with Multiple Contacts

[Charles Phillips]

With the below, we loop through all of the contacts that match $fu, but only unregister the one matching the $ci of the 200 OK that is associated with the unregister (Expires: 0) request from the upstream server. 

It actually has 3 parts.  For completeness, I probably should have added them all.  Below:


route[REGISTRAR] {

….
do stuff
….

	if (search_hf("Expires", "^0$", "a")) {

                ….
		do stuff
		….

                t_on_reply("UNREGISTER");
                xlog("L_INFO", "Processing unregister event from $si To: $tu\n");
                route(RELAY);
                exit;
            }
….
do stuff
….

}


onreply_route[UNREGISTER] {
    if (t_check_status("200")) {
        route(UNREG);
    }
}


route[UNREG] {
    reg_fetch_contacts("location", "$fu", "un_reg");
    $var(i) = 0;
    while ($var(i) < $(ulc(un_reg=>count))) {
        $var(ul_callid) = $(ulc(un_reg=>callid)[$var(i)]);
        $var(ul_ruid) = $(ulc(un_reg=>ruid)[$var(i)]);
        if ($var(ul_callid) == $ci) {
            xlog("L_INFO", "Unregistering contact $tu Ruid: $var(ul_ruid)\n");
            unregister("location", "$fu", "$var(ul_ruid)");
            $sht(regs=>$fU@$fd~$ci)=$null;
        }
        $var(i) = $var(i) + 1;
    }
}

- Charles




> On Feb 21, 2021, at 8:45 AM, David Villasmil <david.villasmil.work at gmail.com> wrote:
> 
> Beware that since you’re removing all contacts, if any are valid and if any of the contacts that did not unregister is called, Kamailio won’t find them.
> 
> If what you need is not force only one contact per user, maybe look at 
> http://www.kamailio.net/docs/modules/5.4.x/modules/registrar.html#registrar.f.save <http://www.kamailio.net/docs/modules/5.4.x/modules/registrar.html#registrar.f.save>
> 
> On Sun, 21 Feb 2021 at 13:14, Charles Phillips <charles at rustybike.com <mailto:charles at rustybike.com>> wrote:
> Sorted it.  I needed to loop through the contacts, then select the correct ruid based on $ci
> 
> For completeness, here is my solution:
> 
> reg_fetch_contacts("location", "$fu", "un_reg");
>     $var(i) = 0;
>     while ($var(i) < $(ulc(un_reg=>count))) {
>         $var(ul_callid) = $(ulc(un_reg=>callid)[$var(i)]);
>         $var(ul_ruid) = $(ulc(un_reg=>ruid)[$var(i)]);
>         if ($var(ul_callid) == $ci) {
>             xlog("L_INFO", "Unregistering contact $tu Ruid: $var(ul_ruid)\n");
>             unregister("location", "$fu", "$var(ul_ruid)");
>             $sht(regs=>$fU@$fd~$ci)=$null;
>         }
>         $var(i) = $var(i) + 1;
>     } 
> 
> 
> - Charles 
> 
> 
> 
> 
>> On Feb 19, 2021, at 9:43 AM, Charles Phillips <charles at rustybike.com <mailto:charles at rustybike.com>> wrote:
>> 
>> Happy Friday!
>> 
>> To clean up contacts that have sent requests to unregister (Expires: 0) I am executing the following after a 200 OK response from the upstream server:
>> 
>>     reg_fetch_contacts("location", "$fu", "un_reg");
>>     xlog("L_INFO", "Removing unregistered contact From: $si To: $tu Ruid: $ulc(un_reg=>ruid)\n");
>>     unregister("location", "$fu", "$ulc(un_reg=>ruid)”);
>> 
>> This produces the desired result when there is only one contact per AoR, but when multiple contacts are present, it seems to delete the first ruid (which makes sense as I am only providing the $fu).  
>> 
>> So, the question, can I select the contact by call-id or some other unique identifier specific to the desired contact that I can grab from the transaction?  Reading the reg_fetch_contact and unregister docs, they do not seem to provide for selection beyond uri.
>> 
>> 
>> - Charles
>> 
>> 
>> 
>> 
> 
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> -- 
> Regards,
> 
> David Villasmil
> email: david.villasmil.work at gmail.com <mailto:david.villasmil.work at gmail.com>
> phone: +34669448337
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