[OpenSIPS-Users] B2BUA tests

[Anca Vamanu]

Hi Jeff,

You are right. You only need to call b2b_init function for the init 
request. But beware that the requests for that dialog will not get into 
the script anymore.
You can read more details here: 
http://www.opensips.org/Resources/B2buaTutorial#toc17.
If you are doing some other processing on the proxy, like accounting, it 
is advisable to move the B2BUA component on a separate server and to 
forward the requests to it.

Regards,
Anca

Jeff Pyle wrote:
> Hi Anca,
>
> Please let me know if my train of thought makes sense.
>
> I have a functional traditional proxy configuration where packets are
> forwarded with t_relay, loose_route, etc.  If I wanted to convert this to a
> topology hiding B2BUA in Opensips, I would replace the t_relay of the
> initial INVITE with a b2b_init.  That way, instead of statefully relaying to
> the UAS, I would be establishing a new dialog in B2BUA mode.
>
> Am I on the right track?  Would I need to do anything to the current
> loose_route section, or would all dialogs be translated automatically
> without any modification?
>
>
> - Jeff
>
>
>
> On 10/28/09 4:48 AM, "Anca Vamanu" <anca at opensips.org> wrote:
>
>   
>> Hi Jeff,
>>
>> I have completed the documentation on
>> http://www.opensips.org/Resources/B2buaTutorial#toc12 with some schema.
>> What happens in topology hiding is that the B2BUA starts a new dialog
>> with the other party, so it will first send an INVITE message. Now, if
>> you call b2b_init before you do lookup location and the target address
>> is has in the domain part the domain of your sip proxy, then the INVITE
>> will get back to the server and back in the script. For this case I was
>> saying that you should not require authentication for it.
>> And no, the B2BUA component does not have any type of authentication of
>> its own, it only knows to put itself in the middle of the call and
>> establish two dialogs, with each party.
>>
>> Regards,
>> Anca
>>
>>
>>
>> Jeff Pyle wrote:
>>     
>>> Anca,
>>>
>>> Does the B2BUA module have some type of authentication on its own?  Is it
>>> looping back to the top of the script and trying to authenticate itself, and
>>> that's where your suggestion comes from?  Or something else?
>>>
>>> It appears I don't have a good understanding of the message flow through
>>> Opensips in a B2BUA'd session.  At b2b_init time, does something return to
>>> the top of route[0] and start over?  As such should I run b2b_init as close
>>> to the top of route[0] as possible?
>>>
>>> If you could help me understand what happens to the message flow in a
>>> non-B2BUA session versus one that has B2BUA, perhaps I'll be able to my mind
>>> around this.
>>>
>>>
>>> Thanks,
>>> Jeff
>>>
>>>
>>>
>>> On 10/27/09 12:48 PM, "Anca Vamanu" <anca at opensips.org> wrote:
>>>
>>>   
>>>       
>>>> Hi Jeff,
>>>>
>>>>
>>>> To get pass the problems with authentication I suggest you put a check
>>>> in your configuration file:
>>>>
>>>> if(src_ip== proxy_ip && src_port== proxy_port)
>>>>     dont_ask_authetification;
>>>>
>>>> Just to let it pass without challenging it and go to the part where the
>>>> Invite is forwarded to the end user.
>>>>
>>>> Regards,
>>>> Anca
>>>>
>>>>     
>>>>         
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>>     
>
>
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