Re: The tale of a TCP bug

2011-03-26 Thread Stefan `Sec` Zehl
Hi again, On Fri, Mar 25, 2011 at 16:40 -0400, John Baldwin wrote: > Reading some more. I'm trying to understand the breakage in your case. > > You are saying that FreeBSD is the sender, who has data to send, yet is not > sending any window probes because it never starts the persist timer when

Re: The tale of a TCP bug

2011-03-26 Thread Stefan `Sec` Zehl
Hi, > On Fri, Mar 25, 2011 at 16:40 -0400, John Baldwin wrote: > > And the problem is that the code that uses 'adv' to determine if it > > sound send a window update to the remote end is falsely succeeding due > > to the overflow causing tcp_output() to 'goto send' but that it then > > fails to se

Questions on LRO and Delayed ACK

2011-03-26 Thread David Somayajulu
Hi All, 1. If there is hardware support for LRO, (where the hardware delivers coalesces a bunch of consecutive TCP segments into one large TCP Segment), is it enough for the driver to simply post the segment to the host stack via ifp->if_input() ? I mean is there a need to run thru tcp_l