Date: Sun, 9 Nov 2003 12:59:57 -0800 From: Jonathan Mini <mini@freebsd.org> To: Andre Oppermann <oppermann@pipeline.ch> Cc: freebsd-net@freebsd.org Subject: Re: tcp hostcache and ip fastforward for review Message-ID: <ACD9C291-12F7-11D8-87D8-000A95CD3CF8@freebsd.org> In-Reply-To: <3FAE68FB.64D262FF@pipeline.ch> References: <3FAE68FB.64D262FF@pipeline.ch>
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On Nov 9, 2003, at 8:19 AM, Andre Oppermann wrote: > - DoS attack 2: make MSS very low on local side of connection > and send maaaany small packet to remote host. For every packet > (eg. 2 bytes payload) a sowakeup is done to the listening > process. Consumes a lot of CPU there. > This sounds as if it might be worthwhile to add a delay to the TF_NODELAY case for receive processing as well. -- Jonathan Mini mini@freebsd.org http://www.freebsd.org
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