On a really bad day, you can make it work with a B2BUA in the middle. But really, the technology shouldn't act so dumb, right? :) On Fri, Jul 10, 2009 at 2:13 PM, Alex Balashov <[email protected]>wrote:
> Brett is very right. I think one of the reasons I reacted instinctively > to this scenario was because I tried to implement something similar with a > well-known switch once (I think it was a Metaswitch) and the signaling agent > reacted to my "spiral" (which I didn't know to be such) as though it were a > "loop." > > Brett Nemeroff wrote: > > 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) >> >> 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.. >> -Brett >> >> On Fri, Jul 10, 2009 at 2:02 PM, Iñaki Baz Castillo <[email protected]<mailto: >> [email protected]>> wrote: >> >> El Viernes, 10 de Julio de 2009, Alex Balashov escribió: >> > > npdi and rp are *userinfo* parameters (in fact they are TEL URI >> > > paremeters so when converting to SIP URI they become part of >> the userinfo >> > > part). http://www.tech-invite.com/Ti-sip-abnf.html#teluri >> > > >> > > So, if the original RURI is: >> > > sip:[email protected] <sip%3a%[email protected]> >> <mailto:sip%3a%[email protected]<sip%253a%[email protected]> >> > >> > > >> > > and OpenSIPS modifies it to: >> > > sip:+12345678;npdi=123;[email protected] >> <mailto:[email protected]> >> > > >> > > then both RURI's are differents and the softsiwtch won't >> consider it a >> > > loop. >> > > >> > > However, if the parameters are added as SIP URI parameters >> (after the >> > > hostpart) the it would be a loop (except if they are maddr, >> user, ttl). >> > >> > How does that change the other logical attributes of a call leg, >> i.e. >> > Call ID GUID, From tag, CSeq, etc? >> >> If the RURI changes, then it's *not* a loop, but a spiral. Re-read the >> appropiate section in RFC 3261 :) >> >> >> -- >> Iñaki Baz Castillo <[email protected] <mailto:[email protected]>> >> >> _______________________________________________ >> Users mailing list >> [email protected] <mailto:[email protected]> >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users >> >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Users mailing list >> [email protected] >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users >> > > > -- > Alex Balashov > Evariste Systems > Web : http://www.evaristesys.com/ > Tel : (+1) (678) 954-0670 > Direct : (+1) (678) 954-0671 >
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