[Blink] Chat failure with Blink
Javier.Zhu at alcatel-lucent.com
Mon Feb 17 15:02:21 CET 2014
Saúl Ibarra Corretgé,
Thanks for investigating the problem.
Currently I don’t have a MSRP relay.
Do you know how I can configure Blink to send out the initial MSRP session with ‘a=setup:actpass’ on the SDP?
Then the terminating Blink will not try to use a relay once it receives the session.
From: blink-bounces at lists.ag-projects.com [mailto:blink-bounces at lists.ag-projects.com] On Behalf Of Saúl Ibarra Corretgé
Sent: 2014年2月17日 16:30
To: Blink Support Forum
Subject: Re: [Blink] Chat failure with Blink
On Feb 17, 2014, at 3:52 AM, ZHU Javier wrote:
> Any suggestion on the issue?
> From: blink-bounces at lists.ag-projects.com [mailto:blink-bounces at lists.ag-projects.com] On Behalf Of ZHU Javier
> Sent: 2014年2月14日 16:37
> To: Blink Support Forum
> Subject: Re: [Blink] Chat failure with Blink
> Saúl Ibarra Corretgé,
> Thanks for your response.
> Below is the snapshot of my configuration.
> I didn’t check the option of “Always use my relay for outgoing sessions”.
That checkbox only applies to outgoing sessions.
> Why Blink didn’t use the IP/port in the SIP/SDP message?
Here is what's happening: you are getting an incoming session with MSRP, so Blink will always try to use a relay unless it finds a=setup:actpass on the SDP, which is the case. Since you didn't specify a relay Blink will do a DNS SRV lookup for _msrps._tcp.yourdomain.com (it may fallback to the A record if it finds nothing in the SRV), and use the result, in case there was a result. Apparently Blink did find a result, and tried to connect to it, without success. Hence the call failure.
Saúl Ibarra Corretgé
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