[OpenSIPS-Users] PRACK response to 183 without SDP

[solarmon]

Hi Toni,

Thanks, I did come across that.

I was hoping not to have to install a module and have to do even more
changes to accommodate it. I was hoping that there was already a core
feature/mechanism to handle responding back with a PRACK.

Thank you.

On Mon, 18 Jan 2021, 17:35 Tomi Hakkarainen, <tpaivaa at gmail.com> wrote:

> Hi,
>
> I guess does not answer the guestion but take a look at this:
>
> https://github.com/OpenSIPS/opensips/issues/2076
>
> that said could you setup b2b logic to fix interworking issues?
>
> Tomi
>
> On 18. Jan 2021, at 18.31, solarmon <solarmon at one-n.co.uk> wrote:
>
> 
> Hi Johan,
>
> The first 183 packet that is received has no SDP in it and has:
>
> Require: 100rel
>
> I wish to prevent this from being passed on, but still respond what with a
> PRACK (since 100rel has been requested). The reason for this is that our
> system will not work if it first receives a 183 without SDP and then
> receives a second 183 with SDP.
>
> Thank you.
>
> On Mon, 18 Jan 2021 at 16:13, Johan De Clercq <Johan at democon.be> wrote:
>
>> you mean that the remote party sends you required:100rel ? The only way
>> that I know is by using b2b logic.
>> Maybe Bogdan can shed some light here.
>>
>> Op ma 18 jan. 2021 om 17:07 schreef solarmon <solarmon at one-n.co.uk>:
>>
>>> Hi,,
>>>
>>> I have a requirement to stop 183 without SDP packets from being passed,
>>> as well as having to reply back with a PRACK.
>>>
>>> I can stop the 183 without SDP from being passed on with the following
>>> in onreply_route[]
>>>
>>>  if ($rs == "183" && !has_body_part("application/sdp")) {
>>>                 drop();
>>>                 exit;
>>>         }
>>>
>>> However, how do I reply back with a PRACK?
>>>
>>> Thank you.
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>>>
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