[OpenSIPS-Users] replace_from restore redundant from

[kaiser]

Bogdan,

We have tested several ways:

1. use uac_replace_from in failure route only:
this make redundant "from" header in reply 200 OK.

2. use uac_replace_from in request route and failure route:
It makes outgoping INVITE with strange from header.

br
kk


Bogdan-Andrei Iancu 提到:
> Hi KK,
>
> do you do uac_replace_from() in other routes than failure_route() ? 
> like in request route when you process the request for the first time?
>
> Regards,
> Bogdan
>
> Gentrice's kaiser wrote:
>> Dear Sir:
>>
>>
>> I wrote a failure route for serial call mechanism, it help for no 
>> answer call ...
>> but all these serial calls need to have a new CallerID,
>> so I use replace_from for this purpose.
>>
>>
>>
>> modparam("uac","from_restore_mode","auto")
>>
>>
>> failure_route[3]
>> {
>> log(1,"******* I'm failure_route[3] *******\n");
>>
>> if (avp_pushto("$ru", "$avp(forward)"))
>> {
>> append_branch();
>> avp_delete("$avp(forward)");
>> uac_replace_from("sip:1234@$fd"); # change from header
>> t_on_failure("3"); # try next , recursive
>>
>> t_relay();
>>
>> }
>>
>> }
>>
>>
>>
>> If only one forward number in AVP array , this code working fine,
>> the issue will happen if multiple forward number trying, ( forward 
>> 2nd,3rd ...number)
>> the UAC module will restore from header in 200 OK of its following 
>> message when a UA answered,
>> we will have a duplicated "from header" in 200 OK (sending out 
>> opensips).
>> It means we will have 2 "from" headers (in 200 OK) to caller, if 2nd 
>> forwarded callee answer.
>>
>> Caller ---> Invite ---> opensips ----> UA 0, no answer
>> ----> UA 1, no answer
>> ---->UA 2, answer
>> <----200 OK
>> <---200OK<---
>>
>> this 200ok will have 2 "from" header.
>>
>>
>>
>> Most of UA just ignore redundant from header, but some can not.
>> I think it should be UAC modules issue, anyone can help me?
>>
>> best regards
>> KK
>>
>>
>>
>>
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>