Re: [EXT] Re: Possible bug introduced in 5.8.5

Andreas,

I had the same issue, but with From uri, but I've found, that I have
independed assigning of $fu / $fd. So, will repeat here what I've got from
commit author (that introduced this "regression")

$tu - To URI

*$tu* - reference to URI of 'To' header

🔥*IMPORTANT*: It is R/W variable (you can assign values to it directly in
configuration file, but its value does not change)

NOTE: When using this along with $tn to change part of the message,
applying them all at once can result in unintended side-effects. To ensure
that the changes are applied to the message as intended, it is suggested to
use the msg_apply_changes() function from the textopsx module after each
change to the message. This function can ensure that the changes are
applied correctly and that the message remains valid.

https://www.kamailio.org/wikidocs/cookbooks/devel/pseudovariables/#tu-to-uri

Le mer. 4 févr. 2026 à 11:01, Andreas Heil via sr-users <
[email protected]> a écrit :

> Hi Björn,
>
> Thanks for the answer. I’ll have a look in that.
>
> Greetings,
> Andreas
>
> Am 03.02.2026 um 17:25 schrieb Björn Klasen via sr-users <
> [email protected]>:
>
> Hi Andreas,
>
> have you tried assing_hf_value from tmx module or just remove and add the
> header with remove_hf and append_hf.
>
> The problem seems to be the missing brackets around the sip-uri, so it can
> not be correctly parsed by uac_replace_to
>
> Greetings, Björn
> Am 03.02.26 um 16:26 schrieb Andreas Heil via sr-users:
>
> Hi all,
>
> I’m currently testing a migration from version 5.6.x to 5.8.x.
>
> The problem:
> 1. INVITE comes in with a To-header like this:
>
>   To: sip:[email protected]:5060
>
> 2. uac_replace_to in a branch_route:
>
>   uac_replace_to("", "sip:+$(avp(newDAD){s.replace,CC,})@$var(carrierDomain);user=phone“);
>
> Note: It does not matter if we try to change the To in different ways like:
>   uac_replace_to("", "sip:[email protected];user=phone“);
> Or:
>   $td = „some.carrier.net" <sip:[email protected];user=phone%E2%80%9C);Or:$td=%E2%80%9Esome.carrier.net>;
>
> 3. What gets on the line is:
>
>   To:  <sip:[email protected]:5060> <sip:[email protected]:5060>sip:[email protected];user=phone
>
> Or in case of ($td):
>
>   To:  <sip:[email protected]:5060> <sip:[email protected]:5060>some.carrier.net
>
> Note: the INVITE received has 1 space between „To:" and Content, The INVITE send has 2 spaces.
>
> The bug only appears if the initial to-header is NOT enclosed in < >.
>
> I could track it down to version 5.8.5 in which it appeared first.
> Everything before (including 5.8.4) behaves normally.
>
> I think it’s introduced by commit 6367a41f64ed165792ffe71ea310fd917947ccba
> There is a comment beneath it, that reports something similar with the From header, too.
>
> How can I fix that in the config, or is it a bug?
>
> Greetings,
> Andreas
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-- 
Best regards,
Ihor (Igor)

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