[OpenSIPS-Users] No to tag in CANCEL response - Via removed
bogdan at opensips.org
Wed Jun 25 12:11:00 CEST 2014
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.
OpenSIPS Founder and Developer
On 24.06.2014 20:19, Chris Maciejewski wrote:
> 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:
> 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,
> Users mailing list
> Users at lists.opensips.org
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