[Users] corrupted From with uac_replace_from in case of re-invite

[Bogdan-Andrei Iancu]

Hi Tele,

ok - I made a bit of digging into your trace and the found the problem.

As you suspected it is related to the fact that the UAS does not mirror 
all the RR parameters. The ftag is not mirror and this flag is required 
as it is used to tell the direction (up or downstream) of the sequential 
requests.

So, your proxy founds the vsf tag, but it has no clue (due missing ftag) 
if the change the TO or FROM URI.

regards,
bogdan

tele wrote:
> Hi bogdan,
>
> I'm apologize to insist regarding this but i'm trying to understand. i
> think that i've not supplied to you all the necessary informations.
>
> If you have a look on the pcap attached, there are two call, the first
> was OK and the second one with the FROM problem. I can see the Re-INVITE
> FROM URI and TO URI are correctly swapped, the only difference in the UA
> with problem is the Route header that was mirror with only the vsf
> parameter and not the other ones. If i'm wrong could you please explain
> much more the issue, still unclear to me :-)
>
> thank you very much,
>
> :tele
>
>
> On Mon, 2007-04-16 at 17:16 +0300, Bogdan-Andrei Iancu wrote:
>   
>> Hi tele,
>>
>> yes, the RR headers must be mirror without no change (URI and 
>> parameters), but the problem in your case was not the RR (which was ok), 
>> but the FROM URI - the re-INVITE has a different FROM URI than the 
>> original INVITE.
>>
>> regards,
>> bogdan
>>
>> tele wrote:
>>     
>>> Hi,
>>>
>>> The vendor said:
>>>
>>> "Our implementation of SIP manages in various way regarding the other
>>> device in test, header field “Record” (in particular not retrasmit all
>>> param but filter, for example the "lr" parameter). That cause calling to
>>> consider the proxy of type “strict” and changes the Request-Uri of the
>>> ACK"
>>>
>>> We've also notice that the vendor UA not mirror all the RR parameters
>>>
>>> for example:
>>>
>>> RR of INVITE from OpenSER to -> UA
>>>
>>> Record-Route:
>>> <sip:IP;lr=on;ftag=80b12060-52d7a475-13c4-53c-e3a1aea-53c;vsf=AAAAAAMIBgQEDwcGCAR4DHJeXkkYTQQbQ0xJHkBsZXhpYS5jb206NTA2MA-->
>>>
>>> and the Re-INVITE from UA to OpenSER
>>>
>>> Route:
>>> <sip:IP;vsf=AAAAAAMIBgQEDwcGCAR4DHJeXkkYTQQbQ0xJHkBsZXhpYS5jb206NTA2MA-->
>>>
>>> So i think OpenSER use the ftag and vsf parameter of Route header for
>>> generate the correct From header.. is that true?
>>> so the vendor UA MUST mirror untouched all the parameters?
>>>
>>> thanks,
>>>
>>> :tele
>>>
>>>
>>> On Tue, 2007-04-03 at 17:27 +0300, Bogdan-Andrei Iancu wrote:
>>>   
>>>       
>>>> Hi tele,
>>>>
>>>> the problem is with the re-INVITE which is malformed.
>>>> original INVITE had the FROM URI 
>>>> <sip:396006660084 at plx-c5-pbx.plexia.com:5060>, but the re-INVITE has 
>>>> <sip:0104491093 at plx-c5-pbx.plexia.com:5060>....
>>>>
>>>> the FROM URI does not change during the dialog. It looks like UA bug.
>>>>
>>>> regards,
>>>> bogdan
>>>>
>>>> tele wrote:
>>>>     
>>>>         
>>>>> Hi all,
>>>>>
>>>>> I'm occured in this problem already seen here:
>>>>> http://www.openser.org/pipermail/users/2006-March/003540.html
>>>>>
>>>>> My problem occured between two different UA and only in case of a
>>>>> Re-INVITE for a T.38 fax communication.
>>>>>
>>>>> Im' using openser 1.2.0.
>>>>> I'm doing some translation with From for a correct CLI screening.
>>>>> I'm also checked that the RR parameters are correctly mirrored.
>>>>>
>>>>> find attached here the debug.log and a network trace.
>>>>>
>>>>> thank you
>>>>>
>>>>> :tele
>>>>>
>>>>>   
>>>>>       
>>>>>           
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