Dean Willis wrote:
On Oct 20, 2007, at 1:08 AM, Christer Holmberg wrote:
Hi Paul,
I am talking about a proxy.
So, you are saying that the proxy would always forward the NOTIFY,
even if it does not have any state of a subscription dialog, or
subscription usage within a dialog?
Many proxies blindly forward NOTIFY. I know this because certain very
popular phone adapters with blue boxes use unsolicited NOTIFY for their
message waiting indicators, and many operators seem to have deployed
them with some success, despite much gnashing of teeth on my part.
And apparently SBCs do too for this usage at least.
I gnash my teeth over this stuff too, and I don't carry water for those
who decided to do so. But it does happen. And after awhile you do have
to consider that maybe the standard stuff isn't sufficient if everybody
wants to violate it.
Jonathan had a draft a long time ago about creating implicit
subscriptions as part of registration. It isn't exactly the same
problem, but I wonder if we ought to be examining the bigger problem of
why the existing subscription mechanism isn't sufficient for all
notification needs, and how best to fix that.
Paul
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