Date: Thu, 4 Jan 1996 22:10:14 +0300 (MSK) From: =?KOI8-R?Q?=E1=CE=C4=D2=C5=CA_=FE=C5=D2=CE=CF=D7?= (aka Andrey A. Chernov, Black Mage) <ache@astral.msk.su> To: davidg@Root.COM, Andras Olah <olah@cs.utwente.nl> Cc: current@freebsd.org, "Garrett A. Wollman" <wollman@lcs.mit.edu> Subject: Re: m_copydata panic & tcp_extensions: some results Message-ID: <wzMO2xm0l2@ache.dialup.ru> In-Reply-To: <19542.820777477@curie.cs.utwente.nl>; from Andras Olah at Thu, 04 Jan 1996 18:44:37 %2B0100 References: <19542.820777477@curie.cs.utwente.nl>
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In message <19542.820777477@curie.cs.utwente.nl> Andras Olah writes: >> olah 95/11/03 14:19:52 >> >> Modified: sys/netinet tcp_timer.c >> Log: >> Setting the TF_ACKNOW flag was redundant in the REXMT timeout because >> tcp_output() checks for the condition snd_nxt == snd_una. >> >> Reviewed by: davidg, wollman, olah >> Suggested by: Richard Stevens >This was not related to T/TCP, just a cosmetic change suggested by >Richard Stevens on comp.protocols.tcp-ip some time ago. >Unfortunately, this change can cause the m_copydata panic if T/TCP >is used (even if the application uses TCP in the traditional sense) >and some segments are lost. For the people interested in the >anatomy of this bug, I'll describe the problem in full details. Can you commit right fix into -current, please? I can turn tcp_extensions ON and test it. -- Andrey A. Chernov : And I rest so composedly, /Now, in my bed, ache@astral.msk.su : That any beholder /Might fancy me dead - http://dt.demos.su/~ache : Might start at beholding me, /Thinking me dead. RELCOM Team,FreeBSD Team : E.A.Poe From "For Annie" 1849
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