Date: Fri, 09 Jan 2004 21:42:26 +0800 From: David Xu <davidxu@freebsd.org> To: Andre Oppermann <andre@freebsd.org> Cc: cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/netinet ip_icmp.c tcp.h tcp_input.ctcp_subr.c tcp_usrreq.c tcp_var.h Message-ID: <3FFEAFC2.8070303@freebsd.org> In-Reply-To: <200401081740.i08He8J9063202@repoman.freebsd.org> References: <200401081740.i08He8J9063202@repoman.freebsd.org>
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I got following messages when I am running mysql stress test suite, and the test can not be completed. "too many small tcp packets from 128.0.0.1:20672, av. 91byte/packet, dropping connection" David Xu Andre Oppermann wrote: > andre 2004/01/08 09:40:07 PST > > FreeBSD src repository > > Modified files: > sys/netinet ip_icmp.c tcp.h tcp_input.c tcp_subr.c > tcp_usrreq.c tcp_var.h > Log: > Limiters and sanity checks for TCP MSS (maximum segement size) > resource exhaustion attacks. > > For network link optimization TCP can adjust its MSS and thus > packet size according to the observed path MTU. This is done > dynamically based on feedback from the remote host and network > components along the packet path. This information can be > abused to pretend an extremely low path MTU.
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