El Friday 03 August 2007 11:15:57 Marc LEURENT escribió:
> Hello everybody,
>
> To remind you, I'm trying to set a SIP architecture for NATTED SIP users
> without using any rtp proxy (because of lack of ressource).
> STUN is working very well between 2 users in 2 differents NATs.
> But when they are behing the same NAT, they cannot reach the other.. In
> the INVITE and 200Ok SDP fields, they have put their public address with
> a port reserved with STUN: it's not working!
> I think that it is because it's difficult for them to reach the public
> IPaddress/port where they should send the RTP stream from inside the NAT.
>
> So my idea was: Why not rewriting SDP fields to put their private
> address when they are behind the same NAT
> But I don't know how to rewrite the SDP fields for both users. (I have
> the private address of both users in the location database)
In NAT cases I compare the source IP of the caller with the IP where the
called is:
NOTE:
modparam("usrloc", "nat_bflag", 6)
if (nat_uac_test("19")) {
...
setbflag(6); # NAT flag general
if (method!="REGISTER") {
fix_nated_contact();
setbflag(5); # NAT flag just for the caller
...
if (isbflagset(5)) { # Caller is behind NAT
if ( $dd == $si ) {
xlog("L_INFO", "Both users behind same NAT, so we dont use RtpProxy\n");
resetbflag(6); # Unset NAT flag general.
}
}
I think this is better choice than using RtpProxy and setting private IP's in
SDP and Contact header.
--
Iñaki Baz Castillo
[EMAIL PROTECTED]
_______________________________________________
Users mailing list
Users@openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
