Subject: Re: TCP/Westwood+ support.
To: Charles M. Hannum <>
From: Kentaro A. Kurahone <>
List: tech-net
Date: 01/01/2005 20:04:15
On Sat, Jan 01, 2005 at 07:52:21PM +0000, Charles M. Hannum wrote:
> On Saturday 01 January 2005 19:22, Charles M. Hannum wrote:
> > b) On a fast retransmit, the congestion window is initialized to ssthresh
> > -- in other words, we always set to the linear growth point on a fast
> > retransmit, and never do exponential growth again, except in the case of
> > slow retransmit (or CWM).
> Actually, I'm really confused by this code.  AFAICT, you're never actually 
> doing the fast retransmit; the code that does it is after your "if 
> (tcp_do_westwood_p) {... goto drop;}".  This would, I think, force you to be 
> doing slow-retransmit all the time.

Crud.  You're right.  Need to spend more time with Stevens' vol 2 I guess.

Thanks for all the feedback,

Kentaro A. Kurahone
SIGUSR1 Research and Development
"I am having a hallucination now, I don't need drugs for that."