Date: Wed, 04 Apr 2012 12:13:13 +0200 From: Andre Oppermann <andre@freebsd.org> To: perryh@pluto.rain.com Cc: darrenr@freebsd.org, freebsd-net@freebsd.org Subject: Re: FreeBSD TCP ignores zero window size Message-ID: <4F7C1EB9.5060307@freebsd.org> In-Reply-To: <4f7c62c7.MUlfd0e/uNQsAVZG%perryh@pluto.rain.com> References: <4F75C1A3.4030401@freebsd.org> <4F75D9ED.7080707@freebsd.org> <4F780373.6030107@freebsd.org> <4F7AFEEF.60708@freebsd.org> <4F7B1981.1050009@freebsd.org> <4F7B3098.3090901@freebsd.org> <4f7c62c7.MUlfd0e/uNQsAVZG%perryh@pluto.rain.com>
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On 04.04.2012 17:03, perryh@pluto.rain.com wrote: > Andre Oppermann<andre@freebsd.org> wrote: > >> The other side is retransmitting data we have already received >> and acknowledged ... That behavior is totally non-compliant. > > Any chance our ack of that data got dropped/lost enroute, and the > other side is resending after timing out? The correct ACK is retransmitted about a dozen times for re-synchronization. Unlikely that all of them get lost. On top of it the RST to terminate the session has the correct SEQ. Something's munging the SEQ/ACK space along the way here. -- Andre
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