Just throwing this out.. Not all equipment can handle SIP Spiral properly. <cough> asterisk <cough> (although I know there was work done on Asterisk+SIP Sprial, I don't know where that ended up)<div><div><br>
</div><div>so be careful before you spend a lot of time on that. I'd love to hear how all of that works for you. I've got plans to do something similar in the LNP space..</div><div>-Brett</div><div><br></div><div>
<div class="gmail_quote">On Fri, Jul 10, 2009 at 2:02 PM, Iñaki Baz Castillo <span dir="ltr"><<a href="mailto:ibc@aliax.net">ibc@aliax.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">El Viernes, 10 de Julio de 2009, Alex Balashov escribió:<br>
</div><div class="im">> > npdi and rp are *userinfo* parameters (in fact they are TEL URI<br>
> > paremeters so when converting to SIP URI they become part of the userinfo<br>
> > part). <a href="http://www.tech-invite.com/Ti-sip-abnf.html#teluri" target="_blank">http://www.tech-invite.com/Ti-sip-abnf.html#teluri</a><br>
> ><br>
> > So, if the original RURI is:<br>
> > <a href="mailto:sip%3A%2B12345678@mydomain.org">sip:+12345678@mydomain.org</a><br>
> ><br>
> > and OpenSIPS modifies it to:<br>
> > sip:+12345678;npdi=123;rn=<a href="mailto:456@mydomain.org">456@mydomain.org</a><br>
> ><br>
> > then both RURI's are differents and the softsiwtch won't consider it a<br>
> > loop.<br>
> ><br>
> > However, if the parameters are added as SIP URI parameters (after the<br>
> > hostpart) the it would be a loop (except if they are maddr, user, ttl).<br>
><br>
> How does that change the other logical attributes of a call leg, i.e.<br>
> Call ID GUID, From tag, CSeq, etc?<br>
<br>
</div>If the RURI changes, then it's *not* a loop, but a spiral. Re-read the<br>
appropiate section in RFC 3261 :)<br>
<div class="im"><br>
<br>
--<br>
Iñaki Baz Castillo <<a href="mailto:ibc@aliax.net">ibc@aliax.net</a>><br>
<br>
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