Support for TCP-Illinois

[aspadistra]

Support for TCP-Illinois would be a plus, although I don't know that BT has packet loss issues as such. For people with individual connections with HOPS > 15 it might be useful.

http://en.wikipedia.org/wiki/TCP-Illinois

http://www.princeton.edu/~shaoliu/tcpillinois/index.html

TCP-Illinois is a variant of TCP congestion control protocol, developed at the University of Illinois at Urbana-Champaign. It is especially targeted at high-speed, long-distance networks. A sender side modification to the standard TCP congestion control algorithm, it achieves a higher average throughput than the standard TCP, allocates the network resource fairly as the standard TCP, is compatible with the standard TCP, and provides incentives for TCP users to switch.

[thelittlefire]

Uhm, bittorrent isn't based for speeds,I believe it was designed for low speed high latency networks.

[Switeck]

TCP changes are low-level OS drivers. uTorrent doesn't patch that deep...and definitely SHOULDN'T be hacking system drivers!

[Ultima]

@thelittlefire: Not really Speed and latency have nothing to do with the rationale behind BitTorrent... it just so happens that speed was secondary to minimizing initial seeder bandwidth load when it was designed. How or what transport protocol it uses is inconsequential.

[Harold]

µTorrent wouldn't have to hack into anything though

It could use a raw socket and implement TCP itself

But of course that would be more trouble than it's worth

[Switeck]

Raw socket option isn't available for most Windows platforms without a seriously ugly hack or deep driver rewrites/replacements.

[Harold]

They're available in XP pre SP2, Windows server 2003 and 2008, and anything earlier than XP according to MSDN (obviously, that doesn't mean they actually are)

On XP SP2/3 and Vista they're pretty much broken but then you could still go with "TCP over UDP" which adds a couple of bytes overhead (but since no one is going to actually implement this it doesn't matter at all)

[Firon]

It'd be a new protocol at this point.