[Kamailio-Users] uac_replace_from unexpected behavior

[Daniel-Constantin Mierla]

Hello,

On 03/16/2010 12:52 PM, Brandon Armstead wrote:
> Daniel,
>
>    This is 1.5 and there is nothing between the quotes "".
the question is whether the display name attribute in From header 
structure includes the quotes or not -- this is to be revealed by code.

>
> The last time I tried to remove_hf, and then append_hf(From) or To 
> header, it seemed to break call flow completely?

It can break in case you have non-RFC3261 compliant devices.

What is the value of uac module parameter from_restore_mode?

If it is auto or not set, then it is not the same behavior as with 
remove_hf/append_hf.

>   I will give it another go, however if you have any further thoughts 
> it is much appreciated, thanks!
Going to check the sources and come back with more details.

Cheers,
Daniel

>
> Sincerely,
> Brandon Armstead
>
> On Tue, Mar 16, 2010 at 6:44 AM, Daniel-Constantin Mierla 
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>     Hello,
>
>
>     On 03/16/2010 02:30 AM, Brandon Armstead wrote:
>
>         Hello,
>
>         As always thank you ahead of time for your help and input!
>
>         I am currently calling uac_replace_from("", "") in effort to
>         "leave uri" and "toss away display name"
>
>         Which does seem to work....... for the initial INVITE
>
>         However upon receiving an ACK with an empty display, however
>         "" <- quotations, it does not clear the display "" which is
>         causing issues with one of my upstream vendors.
>
>         Example / Scenario:
>
>         From: "" <sip:uri at host>
>
>         Expected Result upon uac_replace_from("",""):        From:
>         <sip:uri at host>
>
>         Current Result: From: "" <sip:uri at host>
>
>         As you can see it is not stripping the "" empty display quotes.
>
>         Any thoughts / ideas / suggestions to get my desired affect?
>
>     could be that display name is set to empty string (what is between
>     double quotes) and in this case is nothing to replace -- I have to
>     doublecheck the sources. Is it 1.5 or 3.0?
>
>     Are you using From auto-replacing mode? If not, a solution for now
>     is to do From update using header manipulation functions:
>
>     remove_hf("From");
>     append_hf("From: <$fu>;tag=$ft\r\n", "From");
>
>     Cheers,
>     Daniel
>
>     -- 
>     Daniel-Constantin Mierla
>     Kamailio SIP Router Masterclass, Berlin, March 22-26, 2010
>     * http://www.asipto.com/index.php/sip-router-masterclass/
>
>

-- 
Daniel-Constantin Mierla
Kamailio SIP Router Masterclass, Berlin, March 22-26, 2010
* http://www.asipto.com/index.php/sip-router-masterclass/

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