[Serusers] mediaproxy feature request: immediate re-invite

[Federico Giannici]

Klaus Darilion wrote:
> If you have symmetric NAT, then this wont work (as you already said).
> 
> If you have less restictive NAT, you can use STUN so there is no need 
> for a mediaproxy at all.

OK, but I'd like to handle the NAT problems on the server side instead 
of the clients, because:

1) It simplifies clients configuration.

2) I have found that many STUN client implementations are bugged and 
even a GREAT number of ALG implementations are bugged too.

3) I'd like to solve Hairpin problems too, as it is one of the biggest 
problem I have encountered.

With regard of the last point, with the nathelper module I can solve the 
problem of not knowing the NATted SIP port and with this feature of 
mediaproxy I could solve the problem of not knowing the NATted RTP port.

So, making the clients register with their private (not NATted) IP, I 
could have all the data for normal working, and moreover, having the 
original (not NATted IP/ports), I could also avoid the hairpin problems 
(at least for users behind only one level of NAT).

Bye.


> Federico Giannici wrote:
> 
>> As I found no other support email address for mediaproxy, I'm sending 
>> here this request...
>>
>> Is it possible to implement an option in mediaproxy to allow an 
>> IMMEDIATE RE-INVITE to both UAs as soon as the RTP streams start?
>>
>> The idea is to use Mediaproxy only to find out the NATted RTP ports of 
>> both UAs. Then a re-INVITE is immediately sent to the UAs so that the 
>> streams are no longer proxied, avoiding all problems of RTP relaying: 
>> waste of bandwidth, longer delays, bad scalability, etc.
>>
>> I know this will not work with symmetric NATs, but I found that they 
>> are relatively rare and anyway they will neither work with STUN...
>>
>>
>> If anybody knows that this is theoretically impossible to implement, 
>> please tell me that.
>>
>>
>> Thanks.
>>
> 
> 


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    |-                      giannici at neomedia.it
    |ederico Giannici      http://www.neomedia.it
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