[SR-Users] Kamailio IMS: Contact validation during INVITE

[Prashant Desai]

Hi Jason,

Thanks for your reply, we are facing an issue in following usecase.

UE
-------------------------------------------------------------------------------->PCSCF
REGISTER
[src ip:127.0.0.1:8008]
Contact:sip:user at 127.0.0.1:8008


On Tue, Nov 24, 2015 at 5:41 PM, Jason Penton <jason.penton at smilecoms.com>
wrote:

> Hi Prashant,
>
> Often the P-CSCF has to know about the contact (for example for Rx QoS,
> security (asserting identity, etc). It is also possible that a contact
> header is not provided by the UE so you have no alternative but to search
> src info, via info, etc. So that is the main  reason.
>
> So let me understand your problem a little more. You are saying the
> contact with the wrong state is being 'found'? If this is the case, there
> is a reslution we have in our code base that will get into master later
> this week? If not, please can you explain the problem you are having in
> more detail.
>
> Cheers
> Jason
>
> On Tue, Nov 24, 2015 at 1:22 PM, Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>> Hello,
>>
>> updated the subject of the email to reflect it refers to IMS extensions,
>> which are different than the standard IETF registrars.
>>
>> That makes it easier to be spotted by the people using IMS and the dev
>> guys can shed some light on why the implemented that way.
>>
>> Cheers,
>> Daniel
>>
>> On 24/11/15 11:59, Prashant Desai wrote:
>>
>> Hi,
>>
>>
>>
>>   We observe that the following kamailio API is trying to find out user
>> registration by comparing source IP and port with stored contact, if it
>> fails, then it compares based on incoming SIP msg contact uri.
>>
>>
>>
>> is_registered(struct sip_msg* _m, udomain_t* _d){
>>
>>                getContactP(_m,_d);
>>
>> }
>>
>>
>>
>> pcontact_t * getContactP(struct sip_msg* _m, udomain_t* _d) {);
>>
>>                                              //Getting pcontact from
>> source IP and port
>>
>>                                              if
>> (ul.get_pcontact_by_src(_d, &received_host, _m->rcv.src_port,
>> _m->rcv.proto, &c) == 1) {
>>
>>                                                             LM_DBG("No
>> entry in usrloc for %.*s:%i (Proto %i) found!\n", received_host.len,
>> received_host.s, _m->rcv.src_port, _m->rcv.proto);
>>
>>                                              }
>>
>>                               if (c == NULL) {
>>
>>                                              //Getting pcontact from
>> contact uri.
>>
>> if (ul.get_pcontact(_d, &ct->uri, &c) == 0) {
>>
>>
>>
>>
>>                                              }
>>
>>                               }
>>
>> We have use case where INVITE message is from same source IP and port but
>> having unregistered contact.With this scenario,is_registered() will return
>> success.
>>
>> We would like to know reason behind comparing the source IP and port to
>> fetch the pcontact?
>>
>>
>>
>> Regards,
>>
>> Prashant
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>> --
>> Daniel-Constantin Mierlahttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>> Book: SIP Routing With Kamailio - http://www.asipto.com
>> Kamailio Advanced Training, Nov 30-Dec 2, Berlin - http://asipto.com/kat
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>
>
> --
>
> *Jason Penton**Senior Manager: Applications and Services**Smile
> Communications Pty (Ltd)**Mobile:*+27 (0) 83 283 7000*Skype:*
> jason.barry.pentonjason.penton at smilecoms.com <name.surname at smilecoms.com>
> www.smilecoms.com
>
>
>
> This email is subject to the disclaimer of Smile Communications at http://www.smilecoms.com/home/email-disclaimer/ <http://www.smilecoms.com/disclaimer>
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
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