Re: [Sip] Vocabulary and problem statement for Request-URI, retargeting, and SIP routing (long, but read it!)
Dean Willis <dean.willis@softarmor.com> Thu, 17 January 2008 23:37 UTC
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Date: Thu, 17 Jan 2008 17:45:15 -0600
From: Dean Willis <dean.willis@softarmor.com>
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To: Hadriel Kaplan <HKaplan@acmepacket.com>
Subject: Re: [Sip] Vocabulary and problem statement for Request-URI, retargeting, and SIP routing (long, but read it!)
References: <5D1A7985295922448D5550C94DE2918001AC02E9@DEEXC1U01.de.lucent.com> <CA9998CD4A020D418654FCDEF4E707DF040D69C7@esealmw113.eemea.ericsson.se> <0D5F89FAC29E2C41B98A6A762007F5D0549D3F@GBNTHT12009MSX.gb002.siemens.net> <1ECE0EB50388174790F9694F77522CCF1438F1B0@zrc2hxm0.corp.nortel.com> <478CEFB4.6070002@zonnet.nl> <CA9998CD4A020D418654FCDEF4E707DF0413D587@esealmw113.eemea.ericsson.se> <"0D5F89FA C29E2C41B98A6A762007F5D0593C68"@GBNTHT12009MSX.gb002.siemen! s .net> A <CA9998CD4A0 20D418654FCDEF4E707DF04173CB8@esealmw113.eemea.ericsson.se> <0D5F89FAC29E2C41B98A6A762007F5D0593CFF@GBNTHT12009MSX.gb002.siemens.net> A <CA9998CD4A020D418654FCDEF4E707DF041743D6@esealmw113.eemea.ericsson.se> <0D5F89FAC29E2C41B98A6A762007F5D0593E13@GBNTHT12009MSX.gb002.siemens.net> <CA9998CD4A020D418654FCDEF4E707DF041C939B@esealmw113.eemea.ericsson.se> <C8D63C78-437F-430E-950C-2E63C69E3CEF@softarmor.com> <E6C2E8958BA59A4FB960963D475F7AC306E4ED4501@mail.acmepacket.com>
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Hadriel Kaplan wrote: > >>-----Original Message----- >>From: Dean Willis [mailto:dean.willis@softarmor.com] >>Sent: Thursday, January 17, 2008 2:13 PM >> >>Call for clarity on exactly which problems we're solving with UA- >>Loose-Routing, target, CPID, etc. Proposed: target identity, end-to- >>end parameters. > > > Not exactly. I believe the idea in the UALR draft is to get the > target identity/params created by the nearest re-targeting event > relative to the UAS, where those created by the UAC is the default > such event (and thus the logical "farthest"). In other words, what > you say is true, except if the request got retargeted, the identity > and params will be those of the new target, and thus not end-to-end > and not always what the UAC sent. Right? AFAIK, the original goal of UALR was to get parameters to applications. The last time I thought I understood the draft, these were preserved back somewhere on teh route stack so that the application could get them. The other thing UALR does, and this is kind of neat, is allow different sets of parameters to be stuffed in at different places, and for the UAS to be able to differentiate where those parameters were inserted (at least a little bit -- "original", "middle", and "last hop" being easy to parse.). > > For example, given the following, where "RTRG" means Re-Targeting, "RRT" means Re-Routing, "RT" means Routing, and the single letters represent connections: > > RRT > +---+ > |R1 | > B /+---+\ C > RT / \ RT > +---+/ \+---+ > |P1 | |P1 | > A /+---+ +---+\ D > / \ > +---+/ \+---+ > |UAC| |UAS| > +---+ +---+ > > UA-Loose-routing wants the req-uri seen on connection "A" I think. I think so too. > To header gives you A. > PCPID gives you B. > Hist-Info gives you A,B,C. and D is directly visible to UAS, should RT have inserted any. > > But in the re-targeting scenario such as: > RTRG RRT > +---+ +---+ > |R1 | |R2 | > B /+---+\ C E /+---+\ F > RT / \ RT RT / \ RT > +---+/ \+---+ D +---+/ \+---+ > |P1 | |P2 +---+P3 | |P4 | > A /+---+ +---+ +---+ +---+\ G > / \ > +---+/ \+---+ > |UAC| |UAS| > +---+ +---+ > > UA-Loose-routing wants the req-uri seen on connection "C" I think. > To header gives you A. > PCPID gives you E. > Hist-Info gives you A,B,C,D,E,F. As I thought I understood it, UALR gives us the stack of A and C. But I may well not understand. However, this does illustrate that there's another axis of proxy operations that can be happening. In addition to affecting the route, the target, and the identity of the target, proxies may also affect parameters. But "repararametering" is such an ugly word. And it's an ugly concept, when you think about the consequences. I'm tempted to think of all reparametering as retargeting. -- Dean _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use sip-implementors@cs.columbia.edu for questions on current sip Use sipping@ietf.org for new developments on the application of sip
- [Sip] Delivering request-URI and parameters to UA… DRAGE, Keith (Keith)
- VS: [Sip] Delivering request-URI and parameters t… Christer Holmberg
- Re: VS: [Sip] Delivering request-URI and paramete… Jonathan Rosenberg
- VS: VS: [Sip] Delivering request-URI and paramete… Christer Holmberg
- [Sip] RE: Delivering request-URI and parameters t… DRAGE, Keith (Keith)
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Paul Kyzivat
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] RE: Delivering request-URI and paramete… Francois Audet
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Paul Kyzivat
- RE: [Sip] RE: Delivering request-URI and paramete… Francois Audet
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- [Sip] Delivering request-URI and parameters to UA… DRAGE, Keith (Keith)
- RE: [Sip] RE: Delivering request-URI and paramete… Francois Audet
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Paul Kyzivat
- RE: [Sip] RE: Delivering request-URI and paramete… Francois Audet
- Re: [Sip] RE: Delivering request-URI and paramete… Jeroen van Bemmel
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- [Sip] Delivering request-URI and parameters to UA… Christer Holmberg
- [Sip] RE: Delivering request-URI and parameters t… Elwell, John
- [Sip] RE: Delivering request-URI and parameters t… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] Delivering request-URI and parameters t… DRAGE, Keith (Keith)
- RE: [Sip] Delivering request-URI and parameters t… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Paul Kyzivat
- [Sip] SIP Routers kamalakar.mergu
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] Delivering request-URI and parameters t… youssef.chadli
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Joel M. Halpern
- Re: [Sip] Delivering request-URI and parameters t… Enrico Marocco
- Re: [Sip] SIP Routers James M. Polk
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- RE: [Sip] RE: Delivering request-URI and paramete… Elwell, John
- [Sip] Vocabulary and problem statement for Reques… Dean Willis
- Re: [Sip] Vocabulary and problem statement for Re… Dean Willis
- RE: [Sip] Vocabulary and problem statement for Re… DRAGE, Keith (Keith)
- RE: [Sip] Vocabulary and problem statement for Re… Hadriel Kaplan
- RE: [Sip] Vocabulary and problem statement for Re… Hadriel Kaplan
- Re: [Sip] Vocabulary and problem statement for Re… Dean Willis
- RE: [Sip] Vocabulary and problem statement for Re… Sanjay Sinha (sanjsinh)
- RE: [Sip] Vocabulary and problem statement for Re… Hadriel Kaplan
- Re: [Sip] Vocabulary and problem statement for Re… Dean Willis
- Re: [Sip] Vocabulary and problem statement for Re… Jeroen van Bemmel
- RE: [Sip] Vocabulary and problem statement for Re… Elwell, John
- Re: [Sip] Vocabulary and problem statement for Re… Paul Kyzivat
- RE: [Sip] Vocabulary and problem statement for Re… Hadriel Kaplan
- RE: [Sip] Vocabulary and problem statement forReq… Elwell, John
- RE: [Sip] Vocabulary and problem statement forReq… Hadriel Kaplan
- Re: [Sip] Vocabulary and problem statement forReq… Paul Kyzivat
- RE: [Sip] Vocabulary and problem statement forReq… Elwell, John
- RE: [Sip] Vocabulary and problem statementforRequ… Elwell, John
- Re: [Sip] Vocabulary and problem statement forReq… Paul Kyzivat
- RE: [Sip] Vocabulary and problem statementforRequ… Christer Holmberg
- Re: [Sip] RE: Delivering request-URI and paramete… Jonathan Rosenberg
- RE: [Sip] Delivering request-URI and parameters t… youssef.chadli
- Re: [Sip] Delivering request-URI and parameters t… Paul Kyzivat
- RE: [Sip] Delivering request-URI and parameters t… youssef.chadli
- RE: [Sip] RE: Delivering request-URI and paramete… Christer Holmberg
- Re: [Sip] Delivering request-URI and parameters t… Paul Kyzivat
- Re: [Sip] Delivering request-URI and parameters t… Hans Erik van Elburg