selftest: packetdrill: Import TFO server tests.

The series imports 15 TFO server tests from google/packetdrill and
adds 2 more tests.

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.

Basically, we only import the non-experimental version of tests, and
for the experimental option, tcp_fastopen_server_experimental_option.pkt
is added.


The following tests are not (yet) imported:

  * icmp-baseline.pkt
  * simple1.pkt / simple2.pkt / simple3.pkt

The former is completely covered by icmp-before-accept.pkt.

The later's delta is the src/dst IP pair to generate a different
cookie, but supporting dualstack requires churn in default.sh, so
defered to future series.  Also, sockopt-fastopen-key.pkt covers
the same function.


The following tests have the experimental version only, so converted
to the non-experimental option:

  * client-ack-dropped-then-recovery-ms-timestamps.pkt
  * sockopt-fastopen-key.pkt


For the imported tests, these common changes are applied.

  * Add SPDX header
  * Adjust path to default.sh
  * Adjust sysctl w/ set_sysctls.py
  * Use TFO_COOKIE instead of a raw hex value
  * Use SOCK_NONBLOCK for socket() not to block accept()
  * Add assertions for TCP state if commented
  * Remove unnecessary delay (e.g. +0.1 setsockopt(SO_REUSEADDR), etc)


With this series, except for simple{1,2,3}.pkt, we can remove TFO server
tests in google/packetdrill.


Kuniyuki Iwashima (12):
  selftest: packetdrill: Require explicit setsockopt(TCP_FASTOPEN).
  selftest: packetdrill: Define common TCP Fast Open cookie.
  selftest: packetdrill: Import TFO server basic tests.
  selftest: packetdrill: Add test for TFO_SERVER_WO_SOCKOPT1.
  selftest: packetdrill: Add test for experimental option.
  selftest: packetdrill: Import opt34/fin-close-socket.pkt.
  selftest: packetdrill: Import opt34/icmp-before-accept.pkt.
  selftest: packetdrill: Import opt34/reset-* tests.
  selftest: packetdrill: Import opt34/*-trigger-rst.pkt.
  selftest: packetdrill: Refine
    tcp_fastopen_server_reset-after-disconnect.pkt.
  selftest: packetdrill: Import sockopt-fastopen-key.pkt
  selftest: packetdrill: Import
    client-ack-dropped-then-recovery-ms-timestamps.pkt

 .../selftests/net/packetdrill/defaults.sh     |  3 +-
 .../selftests/net/packetdrill/ksft_runner.sh  |  6 +-
 ..._fastopen_server_basic-cookie-not-reqd.pkt | 32 ++++++++
 ...cp_fastopen_server_basic-no-setsockopt.pkt | 21 ++++++
 ...fastopen_server_basic-non-tfo-listener.pkt | 26 +++++++
 ...cp_fastopen_server_basic-pure-syn-data.pkt | 50 +++++++++++++
 .../tcp_fastopen_server_basic-rw.pkt          | 23 ++++++
 ...tcp_fastopen_server_basic-zero-payload.pkt | 26 +++++++
 ...ck-dropped-then-recovery-ms-timestamps.pkt | 46 ++++++++++++
 ...cp_fastopen_server_experimental_option.pkt | 37 ++++++++++
 .../tcp_fastopen_server_fin-close-socket.pkt  | 30 ++++++++
 ...tcp_fastopen_server_icmp-before-accept.pkt | 49 ++++++++++++
 ...tcp_fastopen_server_reset-after-accept.pkt | 37 ++++++++++
 ...cp_fastopen_server_reset-before-accept.pkt | 32 ++++++++
 ...en_server_reset-close-with-unread-data.pkt | 32 ++++++++
 ...p_fastopen_server_reset-non-tfo-socket.pkt | 37 ++++++++++
 ...p_fastopen_server_sockopt-fastopen-key.pkt | 74 +++++++++++++++++++
 ...pen_server_trigger-rst-listener-closed.pkt | 21 ++++++
 ...fastopen_server_trigger-rst-reconnect.pkt} | 10 ++-
 ..._server_trigger-rst-unread-data-closed.pkt | 23 ++++++
 20 files changed, 610 insertions(+), 5 deletions(-)
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-cookie-not-reqd.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-no-setsockopt.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-non-tfo-listener.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-pure-syn-data.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-rw.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_basic-zero-payload.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_client-ack-dropped-then-recovery-ms-timestamps.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_experimental_option.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_fin-close-socket.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_icmp-before-accept.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-after-accept.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-before-accept.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-close-with-unread-data.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_reset-non-tfo-socket.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_sockopt-fastopen-key.pkt
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-listener-closed.pkt
 rename tools/testing/selftests/net/packetdrill/{tcp_fastopen_server_reset-after-disconnect.pkt => tcp_fastopen_server_trigger-rst-reconnect.pkt} (66%)
 create mode 100644 tools/testing/selftests/net/packetdrill/tcp_fastopen_server_trigger-rst-unread-data-closed.pkt

-- 
2.51.0.536.g15c5d4f767-goog