[OpenSIPS-Users] B2BUA | Refer scenario not sending SDP

[Sam Govind]

Yes, thanks for confirming, that it doesn't matter which leg refer is coming
from, now the question is :

> <destination>
>        <value type="header">Refer-To</value>
> </destination>


What is the purpose of the above block when there is no change in the
generated INVITE !! I mean isn't it supposed to get the URI of the C party
from this header and send out invite !

Also I just looked at  b2b_request and it seems like it'll help me alot ,
however, I can detect a REFER request in that route, there I added a custom
Header and that is nowhere to be found in siptraces, also changing anything
in my SIP message doesn't work either. Is this correct behaviour for this
route/module?

Thanks alot for replying to my noobish questions. I really appreciate.


On Thu, Aug 25, 2011 at 12:16 AM, Anca Vamanu <anca.vamanu at gmail.com> wrote:

> Hi Sammy,
>
> On Wed, Aug 24, 2011 at 11:54 AM, Sam Govind <govoiper at gmail.com> wrote:
>
>> Hey Anca,
>>
>> Please tell me why can't I capture the "Refer-To" header coming from B-leg
>> of the call ? earlier in your reply you said its for A-leg. I can't seem to
>> have it working for B-leg.
>>
>> It doesn't matter if it is A or B.
> You can take the Refer-To header in the b2b_request route:
> http://www.opensips.org/Resources/B2buaTutorial#toc19.
>
> Regards,
> Anca
>
>
>
>> Thanks,
>> Sammy
>>
>>
>> On Tue, Aug 23, 2011 at 9:21 AM, Sam Govind <govoiper at gmail.com> wrote:
>>
>>> Thanks Anca for the explanation, but can you just tell me if what I'm
>>> trying to do here is possible with B2BUA or not? if you are saying that A
>>> side Refer-to header will be read then obviously I need to take care of the
>>> client1 and server1 parameters accordingly.
>>>
>>> I've a FreeSwitch as Media-Server to play some IVR to User-A and collect
>>> DTMF.OpenSIPS will be acting as B2BUA for this call.
>>>
>>> Once DTMF are collected, Media-Server Refers the call back to OpenSIPS
>>> At OpenSIPS I need to do some accounting on the collected DTMF    (I may
>>> need more than one XML script to get the control back)
>>> If I get OK from AAA then Send INVITE to the DTMF destination
>>> else Send INVITE to Media-Server to play some Message.
>>>
>>>
>>> On Tue, Aug 23, 2011 at 12:22 AM, Anca Vamanu <anca.vamanu at gmail.com>wrote:
>>>
>>>> Hi Sam,
>>>>
>>>> Seems that you have a bad understanding of what the Refer scenario must
>>>> do. Let's say A and B are in a call. When a Refer message is received from
>>>> A, the B2B will terminate the call leg with A and will try connect B and the
>>>> URI in the Refer-To header. The connection is done indeed by sending first
>>>> an Invite without any SDP to B and doing a late SDP negotiation in 200OK and
>>>> ACK.
>>>> So what you observed, is in fact the wanted behavior.
>>>>
>>>> Regards,
>>>> Anca Vamanu
>>>>
>>>> On Mon, Aug 22, 2011 at 1:07 PM, Sam Govind <govoiper at gmail.com> wrote:
>>>>
>>>>>
>>>>> Hello,
>>>>>
>>>>>
>>>>>
>>>>> I’ve been trying to configure the REFER scenario<http://www.opensips.org/Resources/B2buaTutorial#toc15>but so far no luck. I've successfully called the scenario on initial INVITE
>>>>> and seems like I'm getting B2B responses and replies but when I see sip
>>>>> traces the following two anomalies exist.
>>>>>
>>>>>
>>>>> 1- Refer-To header value is not used anywhere in new INVITE
>>>>>
>>>>> 2- SDP is not sent in new INVITE.
>>>>>
>>>>>
>>>>> Please help.
>>>>>
>>>>>
>>>>>
>>>>> Best Regards,
>>>>>
>>>>> *Sam***
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at lists.opensips.org
>>>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>>>
>>>>>
>>>>
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>>>
>>
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