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5920f154e1
This imports the non-experimental version of opt34/reset-*.pkt.
| Child | RST | sk_err |
---------------------------------+---------+-------------------------------+---------+
reset-after-accept.pkt | TFO | after accept(), SYN_RECV | read() |
reset-close-with-unread-data.pkt | TFO | after accept(), SYN_RECV | write() |
reset-before-accept.pkt | TFO | before accept(), SYN_RECV | read() |
reset-non-tfo-socket.pkt | non-TFO | before accept(), ESTABLISHED | write() |
The first 3 files test scenarios where a SYN_RECV socket receives RST
before/after accept() and data in SYN must be read() without error,
but the following read() or fist write() will return ECONNRESET.
The last test is similar but with non-TFO socket.
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250927213022.1850048-10-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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//
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// Send a RST to a fully established socket with pending data before
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// it is accepted.
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//
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// The socket with pending data won't go away and can still be accepted
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// with data read. But it will be in TCP_CLOSE state.
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`./defaults.sh`
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0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0
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// Invalid cookie, so accept() fails.
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+0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FO aaaaaaaaaaaaaaaa,nop,nop>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK, FO TFO_COOKIE,nop,nop>
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+0 accept(3, ..., ...) = -1 EAGAIN (Resource temporarily unavailable)
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// Complete 3WHS and send data and RST
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+0 < . 1:1(0) ack 1 win 32792
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+0 < . 1:11(10) ack 1 win 32792
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+0 < R. 11:11(0) win 32792
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// A valid reset won't make the fully-established socket go away.
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// It's just that the acceptor will get a dead, unusable socket
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// in TCP_CLOSE state.
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+0 accept(3, ..., ...) = 4
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+0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }%
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+0 %{ assert tcpi_state == TCP_CLOSE, tcpi_state }%
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+0 write(4, ..., 100) = -1 ECONNRESET(Connection reset by peer)
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+0 read(4, ..., 512) = 10
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+0 read(4, ..., 512) = 0
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