Attachment 180829 Details for Bug 217637 – packetdrill script to reproduce the duplicate accept problem

packetdrill script to reproduce the duplicate accept problem

duplicate_accept.pkt (text/x-csrc), 2.19 KB, created by Michael Tuexen on 2017-03-14 21:03:56 UTC

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Creator: Michael Tuexen

Created: 2017-03-14 21:03:56 UTC

Size: 2.19 KB

patch

obsolete

>//
>// Copyright (c) 2017 Michael Tuexen
>// All rights reserved.
>//
>// Redistribution and use in source and binary forms, with or without
>// modification, are permitted provided that the following conditions
>// are met:
>// 1. Redistributions of source code must retain the above copyright
>//    notice, this list of conditions and the following disclaimer.
>// 2. Redistributions in binary form must reproduce the above copyright
>//    notice, this list of conditions and the following disclaimer in the
>//    documentation and/or other materials provided with the distribution.
>//
>// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
>// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
>// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>// SUCH DAMAGE.
>//
>
>// This script reproduces the duplicate accept issue reported in
>// https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217637
>
> 0.00 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
>+0.00 fcntl(3, F_GETFL) = 0x02 (flags O_RDWR)
>+0.00 fcntl(3, F_SETFL, O_RDWR | O_NONBLOCK) = 0
>+0.00 bind(3, ..., ...) = 0
>+0.00 listen(3, 10) = 0
>+0.00 < S  0:0(0) win 65535 <mss 1460,nop,wscale 5>
>+0.00 > S. 0:0(0) ack 1 win 65535 <mss 1460,nop,wscale 6>
>+0.00 <  . 1:1(0) ack 1 win 8192
>+0.00 accept(3, ..., ...) = 4
>+0.00 < P. 1:46(45) ack 1 win 8192
>+0.00 read(4, ..., 2000) = 45
>+0.00 write(4, ..., 395) = 395
>+0.00 > P. 1:396(395) ack 46 win 1026
>+0.00 close(4) = 0
>+0.00 > F. 396:396(0) ack 46 win 1026
>+0.00 < P. 396:404(8) ack 396 win 8192
>+0.00 > R  396:396(0) win 0
>+0.00 accept(3, ..., ...) = -1 EWOULDBLOCK (Operation would block)
>+0.00 < P. 1:54(53) ack 1 win 8192
>+0.00 accept(3, ..., ...) = 4

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Attachments on bug 217637: 180626 | 180691 | 180692 | 180814 | 180829 | 180996 | 180997 | 180999 | 181000 | 184680