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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>
33 lines
1.2 KiB
Plaintext
33 lines
1.2 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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//
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// Send a RST to a TFO socket after it is accepted.
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//
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// The socket will change to TCP_CLOSE state with pending data so
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// write() will fail. Pending data can be still be read and close()
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// won't trigger RST if data is not read
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//
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// 565b7b2d2e63 ("tcp: do not send reset to already closed sockets")
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// https://lore.kernel.org/netdev/4C1A2502.1030502@openvz.org/
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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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+0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop, FO TFO_COOKIE,nop,nop>
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+0 > S. 0:0(0) ack 11 <mss 1460,nop,nop,sackOK>
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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_SYN_RECV, tcpi_state }%
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// tcp_done() sets sk->sk_state to TCP_CLOSE and clears tp->fastopen_rsk
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+0 < R. 11:11(0) win 32792
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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 close(4) = 0
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