[SR-Users] Issue of calls drop 32s

Tue Jun 9 05:50:45 CEST 2020

Hi Daniel,

Sorry for the late reply, I have disabled GRUU to solve the problem due to it will take much time to be configured. Thanks for your great help.

Best Regards,
Rex

From: Daniel-Constantin Mierla <miconda at gmail.com>
Sent: Wednesday, May 20, 2020 3:15 PM
To: Rex Lin (林昱頡) <Rex.Lin at quantatw.com>; Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] Issue of calls drop 32s

Hello,

the contact in 200ok (as well as INVITE) have GRUU addresses, not the end point IP:PORT. For INVITE, you do set_/add_contact_alias(), but it is not done for 200ok.

If you enabled GRUU for registrar module, it should work without set_contact_alias(), by doing lookup("location") for requests within dialog. If the GRUU is done by devices without being enabled in Kamailio, try with set_contact_alias() for 200ok.

Then, do not forget to use handle_ruri_alias() for requests within dialog.

Cheers,
Daniel
On 19.05.20 09:36, Rex Lin (林昱頡) wrote:
Hi Daniel,

Thanks for your reply.
Please refer to the attached output file from Homer which I replaced a few words.

Best Regards,
Rex

From: Daniel-Constantin Mierla <miconda at gmail.com><mailto:miconda at gmail.com>
Sent: Tuesday, May 19, 2020 1:53 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org><mailto:sr-users at lists.kamailio.org>; Rex Lin (林昱頡) <Rex.Lin at quantatw.com><mailto:Rex.Lin at quantatw.com>
Subject: Re: [SR-Users] Issue of calls drop 32s

Hello,

you have to provide the PCAP (or ngrep output) for such a call taken on kamailio system to see the headers of each sip message and try to understand where the issue is.

Cheers,
Daniel
On 18.05.20 09:38, Rex Lin (林昱頡) wrote:
Hi,

Do you need further information? Actually, I am not sure if the process is normal, there‘s no problem with the call at least.
Could it be caused any problem if all clients do fix_nated_register?

Best Regards,
Rex

From: Rex Lin (林昱頡)
Sent: Friday, May 15, 2020 2:37 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org><mailto:sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] Issue of calls drop 32s

Hi Alex,

Thanks for your reply.
ICE/STUN haven’t been activated by our clients. All transmission traffic pass through a proxy server. Below is the screenshot of a normal call process.

[cid:image001.jpg at 01D63E53.12C29CC0]

Best Regards,
Rex

-----Original Message-----
From: sr-users <sr-users-bounces at lists.kamailio.org<mailto:sr-users-bounces at lists.kamailio.org>> On Behalf Of Alex Balashov
Sent: Thursday, May 14, 2020 12:18 AM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org<mailto:sr-users at lists.kamailio.org>>
Subject: Re: [SR-Users] Issue of calls drop 32s

It's a tell-tale sign of an end-to-end ACK from the caller not being forwarded properly to the callee. The server should not be forwarding such an ACK "to itself"; this suggests that its Request URI may be improperly constructed (it should be equivalent to the remote Contact URI of the callee in the 200 OK message), or that its Route headers are somehow incorrect (they should mirror the Record-Route set in the 200 OK).

-- Alex

On Wed, May 13, 2020 at 04:07:16PM +0000, Rex Lin (林昱頡) wrote:

> Hi,
>
>
> It’s weird that the calls always drop after 32s while the callee is using public ip. Also, Server forwards ACK to itself with UDP, instead of forwarding to callee with TLS.
>
>
> Moreover, I cannot see “Received” in AOR as the callee finish the registration.
>
>
> I recognized it’s marked by nat_uac_test(“19”) and set with fix_nated_register(), the problem can be resolved.
>
>
> My scenario is as below, for your reference.
>
> 1.Kamailio version is 4.4.7, listening public ip.
>
> 2.Caller it’s behind NAT.
>
> 3.Clients of Linphone.
>
>
> Do you know the reason why it happened?
>
>
>
> Best Regards,
>
> Rex

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--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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Daniel-Constantin Mierla -- www.asipto.com<http://www.asipto.com>

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--

Daniel-Constantin Mierla -- www.asipto.com<http://www.asipto.com>

www.twitter.com/miconda<http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda<http://www.linkedin.com/in/miconda>

Funding: https://www.paypal.me/dcmierla
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