Date: Tue, 29 Dec 2020 09:44:33 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 252263] [tcp] Should we reject packets with the nonmonotonic timestamp? Message-ID: <bug-252263-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252263 Bug ID: 252263 Summary: [tcp] Should we reject packets with the nonmonotonic timestamp? Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: yonghaoz1994@gmail.com The following packetdrill shows different result of last read between Linux and FreeBSD ``` 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 +0 < S 0:0(0) win 1000 <TS val 100 ecr 0,eol,eol> +.5 > S. 0:0(0) ack 1 <...> +.1 < . 1:1(0) ack 1 win 1000 +0.1 accept(3, ..., ...) = 4 +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) = 0 +0 < . 1:1001(1000) ack 1 win 1000 <TS val 100 ecr 0,eol,eol> +0.1 read(4, ..., 1000) = 1000 // Linux accept this packet, while FreeBSD reject. // But if we set the TS val to 50, they both reject it. +0 < . 1001:2001(1000) ack 1 win 1000 <TS val 99 ecr 0,eol,eol> +0.1 read(4, ..., 1000) = 1000 ``` -- You are receiving this mail because: You are the assignee for the bug.home | help
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