[SR-Users] CANCEL before INVITE

[Klaus Darilion]

Am 06.07.2010 18:47, schrieb David:
> Hey,
>
> It's sent when I hit the red button on the phone ( hang up ). It's not
> automated.

So I think there is no solution within Kamailio to work around the bug 
in the phone. You would need to modify tm module to send delayed CANCEL 
not after 100 trying, but only after 101-199 response.

regards
Klaus

>
> David
>
> On 2010-07-06 11:39, Klaus Darilion wrote:
>>
>>
>> Am 06.07.2010 17:04, schrieb Andrei Pelinescu-Onciul:
>>> On Jul 06, 2010 at 16:55, Klaus
>>> Darilion<klaus.mailinglists at pernau.at> wrote:
>>>>
>>>>
>>>> Am 06.07.2010 16:36, schrieb Andrei Pelinescu-Onciul:
>>>>> On Jul 06, 2010 at 14:06, Klaus
>>>>> Darilion<klaus.mailinglists at pernau.at> wrote:
>>>>>> Obiously the device is buggy.
>>>>>>
>>>>>> But there is also on strange thing at Kamailio: it retransmits the
>>>>>> CANCEL although it has already received 481 response on the CANCEL
>>>>>> request.
>>>>>
>>>>> The first 481 stops the CANCEL retransmissions, however each
>>>>> additional
>>>>> provisional reply received after that will trigger a one-time CANCEL
>>>>> retransmission. That's why you see another retransmission after the
>>>>> 481,
>>>>> it's the "response" to the 180...
>>>>
>>>> Cool, nice feature.
>>>>
>>>> Unfortunately it doesn't help with David's problem, as the phone
>>>> obviously does not see the additional CANCEL - probably the phone's
>>>> transaction layer responds again with 481.
>>>
>>> What's strange is that according to the dump it does finally reply with
>>> a 487, but 8s after it sent a 481 to the last CANCEL:
>>>
>>> <- 100
>>> CANCEL ->
>>> <- 481
>>> <- 180
>>> CANCEL
>>> <-481
>>> [8s]
>>> <-487
>>
>> True. David, is the 47 sent by the phone autonomously or due to some
>> user interaction (e.g. rejecting the call)
>>
>> regards
>> klaus
>>
>> _______________________________________________
>> 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
>
>
> _______________________________________________
> 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