[Serusers] How does t_relay() determine the IP/port to send amessage to?

Greger V. Teigre greger at teigre.com
Sat Apr 2 10:02:08 CEST 2005


I would say that for some reason your ser.cfg manipulated the ruri into 
SER's IP address.  AFAIK, t_relay() will always send to the current ruri 
(and branches). BTW, do you have 10.3.0.221 as an alias?
g-)

Java Rockx wrote:
> Hi All.
>
> If I have the following INVITE message, the message is sent to
> 10.3.0.221:5060.
>
> How does t_relay() determine this? Is it because that is the IP in
> the R-URI?
>
> I have a very odd situation where the INVITE is sent to an IP that is
> the same as the SER proxy, but the R-URI is a SIP phone on the public
> internet.
>
> This causes SER to send the message to iteself, which then causes
> (uri==myself) to be FALSE and I just t_relay() it again in my default
> handling.
>
> Does anyone know why ser might attempt to send a message to an IP that
> is __not__ the R-URI? In this example I do have "sip.mycompany.com"
> defined as an alias so I'm not sure what could be causing this loop.
>
>
> U 2005/04/01 11:15:09.620910 66.90.46.29:33697 -> 10.3.0.221:5060
> INVITE sip:3212514239 at sip.mycompany.com;user=phone SIP/2.0.
> Via: SIP/2.0/UDP 172.31.130.83:33697;branch=z9hG4bK02b13d3f9557e284.
>
> U 2005/04/01 11:15:09.633247 10.3.0.221:5060 -> 66.90.46.29:33697
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP
> 172.31.130.83:33697;branch=z9hG4bK02b13d3f9557e284;rport=33697;received=66.90.46.29.
>
> U 2005/04/01 11:15:09.633687 10.3.0.221:5060 -> 10.3.0.221:5060
> INVITE sip:3212514239 at 172.31.130.110;user=phone SIP/2.0.
> Record-Route:
> <sip:3212514239 at 10.3.0.221:5060;nat=yes;ftag=946f5da2c0d8a21c;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK8ca2.b43bda21.0.
> Via: SIP/2.0/UDP
> 172.31.130.83:33697;rport=33697;received=66.90.46.29;branch=z9hG4bK02b13d3f9557e284.
>
> Regards,
> Paul
>
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