On 06/24/2016 04:43 PM, Tom Herbert wrote:
Here's Christoph's slides on TFO in the wild which presents a good
summary of the middlebox problem. There is one significant difference
in that ECN needs network support whereas TFO didn't. Given that
experience, I'm doubtful other new features at L4 could ever be
productively use (like EDO or maybe TCP-ENO).
https://www.ietf.org/proceedings/94/slides/slides-94-tcpm-13.pdf
Perhaps I am being overly optimistic, but my takeaway from those slides
is Apple were able to come-up with ways to deal with the middleboxes and
so could indeed productively use TCP FastOpen.
"Overall, very good success-rate"
though tempered by
"But... middleboxes were a big issue in some ISPs..."
Though it doesn't get into how big (some connections, many, most, all?)
and how many ISPs.
rick jones
Just an anecdote... Not that I am a "power user" of my iPhone running
9.3.2 (13F69) nor that I know that anything I am using is the Apple
Service stated as using TFO (mostly Safari, Mail and Messages) but if it
is, I cannot say that any troubles under the covers have been noticed by me.
