[Devel] Nathelper enhancement

[S G]

I'm trying to minimize the use of rtpproxy. If the 2 clients are a 
considerable distance from the server running rtpproxy you will introduce 
unneccesary lag. This is really noticeable if you are doing anything with 
video. Depending on your client you can usually get the local IP off of the 
callid header or O line in the SDP.

-Sumeet


>From: Tavis P <tavis.lists at galaxytelecom.net>
>To: S G <skg1010 at hotmail.com>
>CC: bogdan at voice-system.ro, devel at openser.org
>Subject: Re: [Devel] Nathelper enhancement
>Date: Tue, 28 Feb 2006 14:33:17 -0800
>
>I've encountered this same problem, however the only solution ( that i
>could come up with at least ) was to force the use of mediaproxy.
>
>If the client is using STUN i do not believe there is a way to determine
>what their internal IP address is
>
>
>Here is an example of what i'm doing from one of my scripts:
>----
># If the IP address of the Callee matches that of the Caller than force
>mediaproxy
># This is a workaround for the problem with hair-pinning NAT when using 
>STUN
># If either side is behind NAT than we can just skip the checks
>if ( !(isflagset(2) or isflagset(3)) )
>{
># Store the destination IP into an AVP
>avp_printf("i:450", "$dd");
>
>if ( avp_check("i:450", "eq/$src_ip/g") )
>{
>log(1, "Forcing Mediaproxy Use Due to Possible Lack of NAT Hairpinning
>Support");
>
># Mark Session to Use Mediaproxy
>setflag(3);
>}
>}
>----
>
>
>S G wrote:
> > Sure. An example would be when there are 2 stun enabled clients
> > calling from behind the same NAT. They both have the same external IP
> > assigned in the SDP due to STUN. Usually most NAT's dont allow hairpin
> > of media so the call fails. I'd like to take the local ip from the O
> > line or from the DB and load it in an AVP then rewrite the C line with
> > the local IP.
> >
> > Thanks,
> > Sumeet
> >
> >
> >> From: Bogdan-Andrei Iancu <bogdan at voice-system.ro>
> >> To: S G <skg1010 at hotmail.com>
> >> CC: devel at openser.org
> >> Subject: Re: [Devel] Nathelper enhancement
> >> Date: Tue, 28 Feb 2006 11:28:12 +0200
> >>
> >> HI Summet,
> >>
> >> basically it can be done, but can you provide a real-case example of
> >> using this feature?
> >>
> >> regards,
> >> Bogdan
> >>
> >> S G wrote:
> >>
> >>> Hi,
> >>>
> >>> This is a request for a nathelper enhancement. Can Nathelper be
> >>> enhanced to insert any user provided IP in the SDP C line through an
> >>> AVP? Currently fix_nated_sdp() can only rewirite with the source IP
> >>> of the message.
> >>>
> >>> Thanks,
> >>> Sumeet
> >>>
> >>> _________________________________________________________________
> >>> FREE pop-up blocking with the new MSN Toolbar – get it now!
> >>> http://toolbar.msn.click-url.com/go/onm00200415ave/direct/01/
> >>>
> >>>
> >>> _______________________________________________
> >>> Devel mailing list
> >>> Devel at openser.org
> >>> http://openser.org/cgi-bin/mailman/listinfo/devel
> >>>
> >>
> >
> > _________________________________________________________________
> > Express yourself instantly with MSN Messenger! Download today - it's
> > FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
> >
> >
> > _______________________________________________
> > Devel mailing list
> > Devel at openser.org
> > http://openser.org/cgi-bin/mailman/listinfo/devel
> >
> >
>

_________________________________________________________________
Don’t just search. Find. Check out the new MSN Search! 
http://search.msn.click-url.com/go/onm00200636ave/direct/01/