[OpenSIPS-Users] No to tag in CANCEL response - Via removed

[Bogdan-Andrei Iancu]

Hi Chris,

The problem is with UAC2 - it generates the 487 reply (frame 11) 
completely bogus :
     - there is one VIA (of .122) missing; the INVITE 487 received had 2 
VIA hdrs, any reply to that INVITE must have also 2 VIA hdrs
     - TO tag is missing (as you noticed) - any final reply must have one !

OpenSIPS is doing nothing wrong - it is removing his own VIA from 487 reply.

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 24.06.2014 20:19, Chris Maciejewski wrote:
> Hi,
>
> I have a strange problem with OpenSIPS 1.11.1 removing Via header and
> routing 487 response with no Via header (which is than dropped by UA1
> as invalid SIP packet - missing Via).
>
> You can see the call flow below:
>
> https://dl.dropboxusercontent.com/u/3182365/call-cancel/call2_index.html
>
> I think the problem is related to the fact UA2 is incorrectly not
> adding To tag to F10 and F11. Since OK 200 in F10 is final response,
> To tag should be present?
>
> Any suggestions how to fix this issue and make Proxy not remove Via
> header very much appreciated.
>
> Best regards,
> Chris
>
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