[OpenSIPS-Users] ACK for invite with wrong Cseq

Bogdan-Andrei Iancu bogdan at opensips.org
Wed Feb 1 08:45:58 EST 2017

Follow up is here : https://github.com/OpenSIPS/opensips/issues/1034

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer

On 02/01/2017 03:13 PM, Schneur Rosenberg wrote:
> Done, thanks
> On Wed, Feb 1, 2017 at 2:49 PM, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:
>> Hi Schneur,
>> Indeed, checking the in-dialog pinging code, I found that the pings _may_ be
>> generated between 200OK and ACK. Could you open a bug request on GITHUT for
>> this topic ?
>> Thanks and Regards,
>> Bogdan-Andrei Iancu
>> OpenSIPS Founder and Developer
>> http://www.opensips-solutions.com
>> On 01/31/2017 01:54 PM, Schneur Rosenberg wrote:
>>> Hi, I'm using OpenSIPS 2.2.2 and I'm using create_dialog with the "Pp"
>>> options, most calls run fine, but I have got complaints about calls
>>> getting disconnected after about 30 seconds, I ran a trace and I
>>> realized that OpenSIPS sent a INVITE with CSeq 601, the called party
>>> picked up after approx 34 seconds and sent a OK with CSeq 601 which
>>> the gateway (Freeswitch in this instance) forwarded to OpenSIPS, but
>>> before OpenSIPS responded with a ACK it sent a ping Options to the
>>> gateway with CSeq 602 and the gateway replied with a OK, and then
>>> OpenSIPS sent the ACK for the INVITE  but used the CSeq of the Options
>>> 602 and not from the INVITE,601, therefore the gateway kept on sending
>>> OK's with CSeq 601 which OpenSIPS responded every time with the ACK
>>> but again with the CSeq 602. then after approx 30 seconds the gateway
>>> sent a bye with Reason: SIP;cause=408;text="ACK Timeout"
>>> _______________________________________________
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