Re: [sipcore] Session Timers (RFC 4028) for REFER, PUBLISH, MESSAGE not defined
Samir Srivastava <srivastava_samir@hush.com> Wed, 13 May 2020 13:50 UTC
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Date: Wed, 13 May 2020 19:50:45 +0600
To: Samir Srivastava <srivastava_samir=40hush.com@dmarc.ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>, Roman Shpount <roman@telurix.com>
Cc: SIPCORE <sipcore@ietf.org>
From: Samir Srivastava <srivastava_samir@hush.com>
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Subject: Re: [sipcore] Session Timers (RFC 4028) for REFER, PUBLISH, MESSAGE not defined
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Hi Paul, SUBSCRIBE / NOTIFY have headers Expires, Min-Expire to handle dialog clearing. ThanksSamir Srivastava http://samirsrivastava.typepad.com On 5/13/2020 at 11:13 AM, "Samir Srivastava" wrote:In-line prefixed with SS>> ThanksSamir Srivastavahttp://samirsrivastava.typepad.com On 5/13/2020 at 3:15 AM, "Paul Kyzivat" wrote:On 5/12/20 5:30 PM, Roman Shpount wrote: > Samir, > > Most likely Min-SE and Session-Expires headers in REFER, PUBLISH, > MESSAGE would be out of scope for 4028bis. So far there was an agreement > to limit the scope of 4028bis to fixing handling of multiple > transactions which modify Session-Expiration at the same time and > associated race conditions. > > Any other changes would need to go into another RFC. > > P.S. Why would you put Min-SE and Session-Expires into REFER, PUBLISH, > MESSAGE? These header fields are only defined for INVITE/UPDATE messages > and not applicable for any other messages. Putting them in *these* messages would be nonsensical because they are neither dialog establishing nor dialog refreshing. OTOH, it would make perfect sense to use them in SUBSCRIBE/NOTIFY because they *are*. Session Timer is about maintaining the dialog. I would think it would be equally applicable to these kinds of dialog usages. But that is probably deserving of discussion. SS>> There are other messages in the table for which these headers are not applicable. On the same line mention these headers are not applicable for REFER, PUBLISH, MESSAGE methods. Messages apart from (re)Inv and UPD are only mentioned in the table in 4028bis and RFC 4028. 4028bis mentions in the table that these headers are not applicable for SUBSCRIBE / NOTIFY also. Thanks, Paul
- [sipcore] Session Timers (RFC 4028) for REFER, PU… Samir Srivastava
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Christer Holmberg
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Paul Kyzivat
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Keith Drage
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Paul Kyzivat
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Christer Holmberg
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Samir Srivastava
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Christer Holmberg
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Keith Drage
- [sipcore] Deprecation of tabular format of header… Samir Srivastava
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Samir Srivastava
- Re: [sipcore] Deprecation of tabular format of he… Adam Roach
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Roman Shpount
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Paul Kyzivat
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Roman Shpount
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Samir Srivastava
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Roman Shpount
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Christer Holmberg
- Re: [sipcore] Deprecation of tabular format of he… Keith Drage
- Re: [sipcore] Deprecation of tabular format of he… Paul Kyzivat
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Samir Srivastava
- Re: [sipcore] Session Timers (RFC 4028) for REFER… Christer Holmberg
- Re: [sipcore] Deprecation of tabular format of he… Adam Roach
- [sipcore] Change log for 4028bis Samir Srivastava
- Re: [sipcore] Change log for 4028bis Christer Holmberg
- Re: [sipcore] Change log for 4028bis Samir Srivastava
- Re: [sipcore] Change log for 4028bis Christer Holmberg
- [sipcore] Comment on https://datatracker.ietf.org… Samir Srivastava
- Re: [sipcore] Comment on https://datatracker.ietf… Roman Shpount
- Re: [sipcore] Comment on https://datatracker.ietf… Samir Srivastava
- Re: [sipcore] Comment on https://datatracker.ietf… Roman Shpount