Removing T/TCP and replacing it with something simpler

[Andre Oppermann]

Poul-Henning Kamp wrote:
> 
> In message <4177C8AD.6060706 at freebsd.org>, Andre Oppermann writes:
> >I want to bring this up for discussion prior to start working on it.
> >
> >I intend to remove T/TCP (transactional TCP) support from our TCP
> >implementation for the following reasons:
> 
> Yeah, go for it!
> 
> >However something like T/TCP is certainly useful and I know of one special
> >purpose application using it (Web Proxy Server/Client for high-delay Satellite
> >connections).
> 
> Wouldn't that be inferior to what accept-filters gives us ?

No, not at all.  In fact they are complementary and work beautifully
together.

T/TCP and the replacement are about cutting the extra round-trip times for
the three-way handshake of TCP.  accept_filter is sort of a buffer that
defers readablility to userland until a full request has been received
(a HTTP/1.1 request for example).

-- 
Andre