Re: [sipcore] #29: B2BUAs passing H-I through?
Hadriel Kaplan <HKaplan@acmepacket.com> Wed, 01 September 2010 00:07 UTC
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From: Hadriel Kaplan <HKaplan@acmepacket.com>
To: Mary Barnes <mary.ietf.barnes@gmail.com>
Date: Tue, 31 Aug 2010 20:07:27 -0400
Thread-Topic: [sipcore] #29: B2BUAs passing H-I through?
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Cc: "worley@alum.mit.edu" <worley@alum.mit.edu>, "sipcore@ietf.org" <sipcore@ietf.org>, sipcore issue tracker <trac@tools.ietf.org>
Subject: Re: [sipcore] #29: B2BUAs passing H-I through?
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I think I know what he's talking about. Since a B2BUA is a UAC and UAS, one might think it should follow the rules for a UAC and UAS in this draft, restarting/clearing the H-I on each side. Section 4.1 has one line which mentions B2BUA's may act "proxy-like" for this header, but in that paragraph it says a UAC MUST add a H-I with an index of 1 if it adds one at all, so a B2BUA would actually do *that* - presumably not what one would want of a B2BUA. What you really want is a sentence/para saying a B2BUA would follow the rules for a Proxy with regards to H-I for requests which it forwards, unless local policy says otherwise; while for requests it generates itself it should act as a UAC. For example if it generates a dialog-creating INVITE due to receiving a REFER, it would act as a UAC per the 4424bis draft, but if it is merely forwarding a dialog-creating INVITE (i.e. generating one due to receiving one) then it should follow the rules for a Proxy and copy the received H-I and add an entry, etc. Right? -hadriel On Aug 31, 2010, at 3:42 PM, Mary Barnes wrote: > I'm not sure what you mean about "explicitly authorizing" - we don't > have anything normative for B2BUAs defined, so I don't see how we can > do anything authoritative in this document. What are the known > problems you would like highlighted? > > On Tue, Aug 31, 2010 at 12:51 PM, sipcore issue tracker > <trac@tools.ietf.org> wrote: >> #29: B2BUAs passing H-I through? >> ---------------------------------+------------------------------------------ >> Reporter: worley@… | Owner: >> Type: enhancement | Status: new >> Priority: major | Milestone: milestone1 >> Component: rfc4244bis | Version: >> Severity: In WG Last Call | Keywords: >> ---------------------------------+------------------------------------------ >> In sections 4.1 and 4.2.1 there is text suggesting that B2BUAs that are >> functioning as "quasi-proxies" may want to copy the incoming H-I into the >> outgoing request (as if they were a proxy). This seems like a good idea >> to me, but it would be wise to have a short section explicitly authorizing >> this behavior and perhaps listing any known problems with this. >> >> -- >> Ticket URL: <http://trac.tools.ietf.org/wg/sipcore/trac/ticket/29> >> sipcore <http://tools.ietf.org/sipcore/> >> >> _______________________________________________ >> sipcore mailing list >> sipcore@ietf.org >> https://www.ietf.org/mailman/listinfo/sipcore >> > _______________________________________________ > sipcore mailing list > sipcore@ietf.org > https://www.ietf.org/mailman/listinfo/sipcore
- [sipcore] #29: B2BUAs passing H-I through? sipcore issue tracker
- Re: [sipcore] #29: B2BUAs passing H-I through? Mary Barnes
- Re: [sipcore] #29: B2BUAs passing H-I through? Hadriel Kaplan
- Re: [sipcore] #29: B2BUAs passing H-I through? Worley, Dale R (Dale)