On Wed, 7 Jul 2004 00:44:53 +0200 bert hubert <ahu@ds9a.nl> wrote: > Not true - the outgoing SYN packet had window scale 7, when it was sent. The > SYN|ACK had window scale 0, when received by the initiating system. > > Also - even if the remote were to assume a 47 byte window size, would it not > be able to send small packets? Or does the window size also include > packet haders? SWS avoidance makes us not send packets. See this quote in an email from John Heffner the other week: ================================ To elaborate on my earlier mail. my hypothesis is that somehow the web server beleives that we sent a winscale of 0. In such a case, when we try to advertise our initial 4*MSS (5840 bytes) of window, with a window scale of 3 we use a value of 730 in the window field. All sender SWS avoidance (RFC1122) tests will fail, most notably 1 (because we already advertised 5840 bytes and 730 < 5840/2) and 3 (because 730 < 1460). With a winscale of 2, we will use a value of 1460 in the window field, so both tests will succeed. ================================ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
