Re: [sip]Join header syntax related to RFC2543
Rohan Mahy <rohan@ekabal.com> Sat, 25 September 2004 20:03 UTC
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From: Rohan Mahy <rohan@ekabal.com>
Subject: Re: [sip]Join header syntax related to RFC2543
Date: Thu, 23 Sep 2004 09:23:39 -0700
To: Dean Willis <dean.willis@softarmor.com>
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Cc: dpetrie@pingtel.com, Rohan Mahy <rohan@ekabal.com>, sip@ietf.org, 石川 愛 <ishikame@alpha.co.jp>
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Hi, The intent of the text is that either the to-tag or the from-tag parameter could match a null tag. Examples are non-normative, so they should not limit what you can do. The normative text intentionally says "a tag" and does not specify what kind of tag. I'm assuming the following text would clarify things appropriately. For compatibility with ... RFC 2543 compliant UAs, a to-tag of zero matches both a to-tag value of zero and a null to-tag. Likewise, a from-tag of zero matches both a to-tag value of zero and a null from-tag. I might even be able to get this text into Replaces as well. thanks, -rohan On Sep 23, 2004, at 8:03 AM, Dean Willis wrote: > 石川 愛 wrote: >> Hi, >> >> I have a question associated with draft-ietf-sip-join-03.txt >> and draft-ietf-sip-replaces-05.txt. >> >> >> Join document at the tail of Section 7.1 saids: >> >> For compatibility with dialogs initiated by RFC2543 [11] >> compliant UAs, a tag of zero matches both tags of zero and null tags >> >> Examples: >> Join: 87134@192.0.2.23;to-tag=24796;from-tag=0 >> >> and also said at section 6.1 in Replaces document. >> >> >> >> In inverse case, i.e., there is a dialog initiated by RFC3261 >> compliant UAs to RFC2543 compliant UAs, is the same? >> In other words, there is a possibility that there is >> no to-tag in this case. So we can as below? >> >> For example, >> Join: 12345@192.1.2.3;to-tag=0;from-tag=56789 >> >> >> In this example, does tag of zero matches both tags of zero >> and null tags? And also for Replaces? > > That's my reading of the doc, although in retrospect the wording at the > end of joing-7.1 is particularly clumsy, and I wish somebody had > noticed > sooner. > > I'd like to ask the authors to clarify here, and perhaps we can get an > errata entry with that clarification. > > -- > 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 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
- Re: [sip]Join header syntax related to RFC2543 Dean Willis
- Re: [sip]Join header syntax related to RFC2543 Rohan Mahy