[Kamailio-Users] uac_replace_from unexpected behavior

Brandon Armstead brandon at voipo.com
Tue Mar 16 15:05:47 CET 2010


Daniel,

    I did do a check and "" quotes are printing in xlog for $fn.

Thanks!

Sincerely,
Brandon Armstead

On Tue, Mar 16, 2010 at 7:32 AM, Daniel-Constantin Mierla <miconda at gmail.com
> wrote:

>  Hello,
>
>
> On 03/16/2010 01:22 PM, Brandon Armstead wrote:
>
> Daniel,
>
>     So if I am to set it to "none" it should give me the desired affects,
> and not alter back to the original From header upon transmission of an ACK?
>
>
> auto mode should do everything (update/restore From (or To)) for within
> dialog requests, if you used uac_replace_from() for initial INVITE,
> therefore this is the best mode. However, it adds an extra parameter (pretty
> long) to RR header and some UA strips it when building the reply.
>
> If you know you are in a SIP2.0 (rfc3261) compatible environment, then you
> can use other modes.
>
> In sip 2.0 a dialog is identified by call-id, from-tag and to-tag, which
> are not affected by From updates. However, in previous version of sip, From
> URI and To URI were used to identify the sip dialog, therefore, in order to
> be compatible with sip 1.0 then you should not change From/To.
>
> In auto mode, the From/To are restored to be safe with sip 1.0 devices.
>
> Btw, if you have time, can you please print the $fn in xlog for ACK and
> send it here? Will show if quotes are considered part of display name. If
> not, I will look later in sources.
>
> Cheers,
> Daniel
>
>
> Sincerely,
> Brandon Armstead
>
> On Tue, Mar 16, 2010 at 7:05 AM, Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>>
>>
>> On 03/16/2010 01:03 PM, Brandon Armstead wrote:
>>
>> Value of uac_restore_mode is not set so "auto".
>>
>>
>>  but if it is not set to something else, this is the default value.
>>
>> Cheers,
>> Daniel
>>
>>
>>
>> Thanks!
>>
>> On Tue, Mar 16, 2010 at 7:00 AM, Daniel-Constantin Mierla <
>> miconda at gmail.com> wrote:
>>
>>> 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> 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/
>>>
>>>
>>
>> --
>> Daniel-Constantin Mierla
>> Kamailio SIP Router Masterclass, Berlin, March 22-26, 2010
>> * http://www.asipto.com/index.php/sip-router-masterclass/
>>
>>
>
> _______________________________________________
> Kamailio (OpenSER) - Users mailing listUsers at lists.kamailio.orghttp://lists.kamailio.org/cgi-bin/mailman/listinfo/usershttp://lists.openser-project.org/cgi-bin/mailman/listinfo/users
>
>
> --
> 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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