[OpenSIPS-Users] Cancelling calls after sending '180 Ringing' via MI t_reply doesn't work

[mayamatakeshi]

Hi Răzvan.

On Tue, Dec 24, 2013 at 6:23 PM, Răzvan Crainea <razvan at opensips.org> wrote:

> Hi, Takeshi!
>
> Is the UAS sending a 100 Trying?


Yes. I just confirmed now: '100 Trying' is sent by the UAS.


> If it's not and you are also dropping all the replies (the 180 messages),
> then OpenSIPS considers that no reply was received from the UAS, therefore
> it cannot be reached. A CANCEL would not make sense, because there is no
> indication that the UAS received the INVITE request.
>

Yes, I eventually realized this would be the case and my approach was wrong.

However, this doesn't explain the result  of my other test:
if instead of dropping it I convert 180 to 181, then the transaction is
cancellable.
But if after relaying this modified message I send '180 Ringing', the
transaction cannot be cancelled anymore.
So it looks like using MI t_reply messes with transactions.

Regards,
Takeshi


>
> Best regards,
>
> Răzvan Crainea
> OpenSIPS Core Developer
> http://www.opensips-solutions.com
>
>
> On 12/21/2013 03:24 AM, mayamatakeshi wrote:
>
>> Hello,
>> I have a requirement to delay the relay of '180 Ringing' for 3 seconds.
>> So what I did was to intercept the '180 Ringing' at the onreply_route
>> and drop it.
>> I send the transaction_id and to-tag to an external app that starts a 3
>> seconds timer and uses t_reply via MI to send a '180 Ringing' on the
>> transaction.
>> This works fine.
>>
>> However, if after the delayed '180 Ringing' is sent the caller cancels
>> the request, opensips doesn't send CANCEL to the callee.
>>
>> I have also tried to convert '180 Ringing' to '181 Call is Being
>> Forwarded' instead of dropping it, and this works fine too and the call
>> can be cancelled.
>> However, if the delayed '180 Ringing' is sent, the call cannot be
>> cancelled anymore.
>> So, am I doing something wrong?
>>
>> Regards,
>> Takeshi
>>
>>
>>
>>
>>
>>
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>>
>>
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