Thank you,

Julia

From: sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Daniel-Constantin Mierla
Sent: Thursday, November 07, 2013 11:30 AM
To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Wrong "To" header in CANCEL, when "To" has been rewritten by uac_replace_to() in branch route

Hello,

what version do you have and what function is used to change the To header?

If you use uac_replace_to() with latest stable version, the new To header should be used for local CANCEL and ACK.

Cheers,
Daniel

On 11/7/13 9:31 AM, Julia wrote:

Hello,

I know it was already discussed, that not recommended to modify “To” header and no routing should ever be done on “To”.

But as long as there are carriers that do it, we need full support for this manipulation for all messages in the call flow.

I found in list a few mails with the same problem of wrong header “To” in CANCEL after “To” rewriting.

And one solution from Vitaliy Aleksandrov :

http://lists.sip-router.org/pipermail/sr-dev/2012-October/016657.html

“Kamailio builds "To" header from the received INVITE.

Patch to fix it:

--- ./kamailio-3.2.3/modules/tm/t_cancel.c      2012-08-22

10:39:21.000000000 +0300

+++ ./kamailio-3.2.3-fixed/modules/tm/t_cancel.c       2012-10-01

18:25:57.000000000 +0300

@@ -284,7 +284,7 @@

         if (cfg_get(tm, tm_cfg, reparse_invite)) {

                 /* build the CANCEL from the INVITE which was sent out */

                 cancel = build_local_reparse(t, branch, &len, CANCEL,

CANCEL_LEN,

- &t->to

+                                                                       NULL

         #ifdef CANCEL_REASON_SUPPORT

                                                                          , reason

         #endif /* CANCEL_REASON_SUPPORT */”

We use header “To” manipulation in branch route (after failure route) and this patch solved our problem with “To” in CANCEL.

But a patch is not committed.

Is it possible to commit this solution?

Thank you,

Julia

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