rcv-rst-ack-without-data-closed-ipv4.pkt

//
// Copyright (c) 2016 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
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// 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
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// SUCH DAMAGE.
//

// Ensure that the reception of a TCP segments with the RST-ACK-bits set in the
// CLOSED state does not result in a state change and no response is sent.

--ip_version=ipv4
--tolerance_usecs=75000

// Ensure that all relevant sysctl variables have their default values.
 0.00 `sysctl -w net.inet.tcp.rfc1323=1`
+0.00 `sysctl -w net.inet.tcp.sack.enable=1`
+0.00 `sysctl -w net.inet.tcp.ecn.enable=2`
+0.00 `sysctl -w kern.ipc.maxsockbuf=2097152`
+0.00 `sysctl -w net.inet.tcp.recvspace=65536`
+0.00 `sysctl -w net.inet.tcp.sendspace=32768`
// Flush host cache.
+0.00 `sysctl -w net.inet.tcp.hostcache.purgenow=1`
// Create a TCP endpoint in CLOSED state.
+0.00 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0.00 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0.00 bind(3, ..., ...) = 0
+0.00 getsockopt(3, SOL_SOCKET, SO_RCVBUF, [65536], [4]) = 0
// Now it is in the CLOSED state.
+0.10 < R. 17:17(0) ack 34 win 32767
// Check that no RST is sent.
+0.00 listen(3, 1) = 0
+0.00 < S   0:0(0)         win 32767 <mss 1460,sackOK,eol,eol>
+0.00 > S.  0:0(0)  ack  1 win 65535 <mss 1460,sackOK,eol,eol>
+0.00 close(3) = 0