Date: Fri, 14 Jul 2000 08:50:02 -0700 (PDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: freebsd-bugs@FreeBSD.org Subject: kern/19913: add SYN+FIN counter Message-ID: <200007141550.IAA86014@freefall.freebsd.org>
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The following reply was made to PR kern/19913; it has been noted by GNATS. From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: hristo@spider.comnet.bg Cc: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/19913: add SYN+FIN counter Date: Fri, 14 Jul 2000 11:40:32 -0400 (EDT) <<On Fri, 14 Jul 2000 11:29:21 +0300 (EEST), hristo@bginfo.net said: > As you know FreeBSD 4 has an option to drop SYN+FIN packets but it does > not has a counter of how much SYN+FIN packets were actually dropped. This > minor patch add sysctl variable to count them and have it for reference > when needed. The code that implements this `feature' is buggy. It should not drop the packets, but rather, trim them back to just a SYN, as Solaris does. (This potentially requires adjusting sequence numbers, depending on the contents of the packet.) If implemented properly, there is no need for instrumentation. -GAWollman To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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