From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: [PATCH] fix tcp_default_win_scale. Date: Tue, 6 Jul 2004 13:35:59 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <20040706133559.70b6380d.davem@redhat.com> References: <32886.63.170.215.71.1088564087.squirrel@www.osdl.org> <20040629222751.392f0a82.davem@redhat.com> <20040630152750.2d01ca51@dell_ss3.pdx.osdl.net> <20040630153049.3ca25b76.davem@redhat.com> <20040701133738.301b9e46@dell_ss3.pdx.osdl.net> <20040701140406.62dfbc2a.davem@redhat.com> <20040702013225.GA24707@conectiva.com.br> <20040706093503.GA8147@outpost.ds9a.nl> <20040706114741.1bf98bbe@dell_ss3.pdx.osdl.net> <20040706194034.GA11021@mail.shareable.org> <20040706130549.31daa8e0@dell_ss3.pdx.osdl.net> <20040706132822.70c8174a.davem@redhat.com> <20040706133641.4a58af30@dell_ss3.pdx.osdl.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: jamie@shareable.org, netdev@oss.sgi.com, linux-net@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: To: Stephen Hemminger In-Reply-To: <20040706133641.4a58af30@dell_ss3.pdx.osdl.net> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Tue, 6 Jul 2004 13:36:41 -0700 Stephen Hemminger wrote: > > Ok, this is a possibility. And why it breaks is that if the ACK > > for the SYN+ACK comes back, the SYN+ACK sender can only assume > > that the window scale was accepted. > > > > Stephen, do you have a trace showing exactly this? > > No, I don't have a br0ken firewall here. I can get out fine. > When I setup with same kernel as packages.gentoo.org, it works fine as well. Therefore we do not know which of the following two it really is: 1) window scale option being stripped from SYN+ACK 2) non-zero window option being patched into a zero window scale option The trace Bert Hubert will get with Alessandro will give us the information we need.