[openser] Re: [Users] Weird forwarding with Route header

[Jeremie Le Hen]

Hi Daniel-Constantin,

thank you for your quick reply.

On Thu, Aug 24, 2006 at 05:27:49PM +0300, Daniel-Constantin Mierla wrote:
> is the IP/domain from R-URI (BYE sip:12345678 at xx.xx.xx.xx SIP/2.0) a
> local one for OpenSER? If so, then the rr module interprets that is a
> strict routing and routes accordingly.

Indeed the incoming BYE request URI is a local one for my proxy.  I made a
mistake while dumping the lines manually in my previous mail.  Good catch.

Actually, I had thought about this and I checked the RFC3261:

%        If the copy contains a Route header field, the proxy MUST
%        inspect the URI in its first value.  If that URI does not
%        contain an lr parameter, the proxy MUST modify the copy as
%        follows:
%
%        -  The proxy MUST place the Request-URI into the Route header
%           field as the last value.
%
%        -  The proxy MUST then place the first Route header field value
%           into the Request-URI and remove that value from the Route
%           header field.

But the original request is (yy.yy.yy.yy being my proxy):

BYE sip:12345678 at yy.yy.yy.yy:SIP/2.0
Record-Route: <sip:xx.xx.xx.xx;ftag=875188d2;lr=on>
Via: SIP/2.0/UDP xx.xx.xx.xx;branch=z9hG4bK07cb.466d8587.0
Via: SIP/2.0/UDP ww.ww.ww.ww:5060;branch=z9hG4bK875196bf
Route: <sip:xx.xx.xx.xx;ftag=1056999653;lr=on>

As you can see, the Route header contains a "lr=on" parameter.
And the outgoing request is nevertheless:

BYE sip:xx.xx.xx.xx;ftag=1056999653;lr=on SIP/2.0
Record-Route: <sip:xx.xx.xx.xx;ftag=875188d2;lr=on>
Via: SIP/2.0/UDP yy.yy.yy.yy;branch=z9hG4bK07cb.02005244.0
Via: SIP/2.0/UDP xx.xx.xx.xx;rport=5060;branch=z9hG4bK07cb.466d8587.0
Via: SIP/2.0/UDP ww.ww.ww.ww:5060;branch=z9hG4bK875196bf


This is why I don't understand what's happening.

Regards,
--
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >