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selftest: packetdrill: Import TFO server basic tests.

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This imports basic TFO server tests from google/packetdrill.

The repository has two versions of tests for most scenarios; one uses
the non-experimental option (34), and the other uses the experimental
option (255) with 0xF989.

This only imports the following tests of the non-experimental version
placed in [0].  I will add a specific test for the experimental option
handling later.

                             | TFO | Cookie | Payload |
  ---------------------------+-----+--------+---------+
  basic-rw.pkt               | yes |  yes   |   yes   |
  basic-zero-payload.pkt     | yes |  yes   |    no   |
  basic-cookie-not-reqd.pkt  | yes |   no   |   yes   |
  basic-non-tfo-listener.pkt |  no |  yes   |   yes   |
  pure-syn-data.pkt          | yes |   no   |   yes   |

The original pure-syn-data.pkt missed setsockopt(TCP_FASTOPEN) and did
not test TFO server in some scenarios unintentionally, so setsockopt()
is added where needed.  In addition, non-TFO scenario is stripped as
it is covered by basic-non-tfo-listener.pkt.  Also, I added basic- prefix.

Link: https://github.com/google/packetdrill/tree/bfc96251310f/gtests/net/tcp/fastopen/server/opt34 #[0]
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250927213022.1850048-5-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2025-09-27 21:29:42 +00:00
committed by Jakub Kicinski
parent 97b3b8306f
commit 0b8f164eb2
5 changed files with 157 additions and 0 deletions
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32
tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-cookie-not-reqd.pkt Normal file
View File

@@ -0,0 +1,32 @@
// SPDX-License-Identifier: GPL-2.0
//
// Basic TFO server test
//
// Test TFO_SERVER_COOKIE_NOT_REQD flag on receiving
// SYN with data but without Fast Open cookie option.
`./defaults.sh
./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x202`
0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3
+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0 bind(3, ..., ...) = 0
+0 listen(3, 1) = 0
+0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0
// Since TFO_SERVER_COOKIE_NOT_REQD, a TFO socket will be created with
// the data accepted.
+0 < S 0:1000(1000) win 32792 <mss 1460,sackOK,nop,nop>
+0 > S. 0:0(0) ack 1001 <mss 1460,nop,nop,sackOK>
+0 accept(3, ..., ...) = 4
+0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }%
+0 read(4, ..., 1024) = 1000
// Data After SYN will be accepted too.
+0 < . 1001:2001(1000) ack 1 win 5840
+0 > . 1:1(0) ack 2001
// Should change the implementation later to set the SYN flag as well.
+0 read(4, ..., 1024) = 1000
+0 write(4, ..., 1000) = 1000
+0 > P. 1:1001(1000) ack 2001