[SR-Users] via header not removed wit hremove_hf()

[Richard Robson]

its a bit of a hack, but the bottom line is the Via has a private IP 
address in it which the carrier we are using  does not like and is 
rejection the call. so i want to remove it to prove a point.

its getting relayed from a kamailio that has topology hiding  to a 
carrier by this intermediate box and this intermediate bos has some 
manual TH. Its not my design and i'm just trying to fix it.


R

On 07/09/2021 14:25, Henning Westerholt wrote:
>
> Hello,
>
> Just a note - maybe you are having some special requirements, but 
> usually you do not need to manipulate the Via header in Kamailio.
>
> If you are relaying the request, why do you do not want to have a Via 
> added to the message? It’s a requirement by RFC 3261 for a stateful proxy.
>
> Cheers,
>
> Henning
>
> -- 
>
> Henning Westerholt – https://skalatan.de/blog/ <https://skalatan.de/blog/>
>
> Kamailio services – https://gilawa.com <https://gilawa.com/>
>
> *From:* Richard Robson <richard at rikrobson.co.uk>
> *Sent:* Tuesday, September 7, 2021 3:13 PM
> *To:* Henning Westerholt <hw at skalatan.de>; Kamailio (SER) - Users 
> Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] via header not removed wit hremove_hf()
>
> hi ,
>
> Thanks Hennig,
>
> I added the counts to check and i'll retest with the 
> ms_+appl_changes() too.
>
> The real problem is that the Via is getting into the relayed INVITE. I 
> had assumed that it would not get relayed if it were removed.
>
> Regards,
>
> Richard
>
> On 07/09/2021 14:05, Henning Westerholt wrote:
>
>     Hello,
>
>     please have a look here
>     http://www.kamailio.org/wiki/tutorials/faq/main#why_changes_made_to_headers_or
>     <http://www.kamailio.org/wiki/tutorials/faq/main#why_changes_made_to_headers_or>
>
>     Cheers,
>
>     Henning
>
>     -- 
>
>     Henning Westerholt – https://skalatan.de/blog/
>     <https://skalatan.de/blog/>
>
>     Kamailio services – https://gilawa.com <https://gilawa.com/>
>
>     *From:*sr-users <sr-users-bounces at lists.kamailio.org>
>     <mailto:sr-users-bounces at lists.kamailio.org> *On Behalf Of
>     *Richard Robson
>     *Sent:* Tuesday, September 7, 2021 2:10 PM
>     *To:* Kamailio (SER) - Users Mailing List
>     <sr-users at lists.kamailio.org> <mailto:sr-users at lists.kamailio.org>
>     *Subject:* [SR-Users] via header not removed wit hremove_hf()
>
>     during testing I need to remove a Via header
>
>     This is the code snippet
>
>     route[REPLACE_VIA] {
>
>         xlog ("L_INFO", "[REPLACE_VIA] Start of block\n");
>
>         xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n");
>
>     if(remove_hf("Via")) {
>
>     xlog ("L_INFO", "[REPLACE_VIA] removed Via\n");
>
>     }
>
>     else {
>
>     xlog ("L_INFO", "[REPLACE_VIA] did not remove Via\n");
>
>     }
>
>         xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n");
>
>     and this is the logs output
>
>     Sep  7 08:00:00 INFO: _LOG:
>     3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_RURI] Start of
>     block
>
>     Sep  7 08:00:00 INFO: _LOG:
>     3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] Start of block
>
>     Sep  7 08:00:00 INFO: _LOG:
>     3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers
>
>     Sep  7 08:00:00 INFO: _LOG:
>     3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] removed Via
>
>     Sep  7 08:00:00 INFO: _LOG:
>     3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers
>
>     From the logs it looks like the remove_hf returns true and we have
>     the header removed, but its still counting the Via header and the
>     Via Header is still present when the INVIE is releyed on
>
>      Regards,
>
>     Richard
>
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