selftests/net/openvswitch: add SCTP flow key test over IPv6

The merged SCTP test covers only IPv4. The SCTP branch of the IPv6
extractor (the proto=132 walk after parse_ipv6hdr) and the v6 side of
the SCTP netlink validation (match_validate() requires the sctp() key
whenever ipv6(proto=132) is matched) have no selftest coverage.

Add test_sctp_connect_v6 mirroring the v4 test: bare icmpv6() flows
forward NS/NA, and ipv6(proto=132),sctp(dst=4443)/sctp(src=4443)
flows gate the association in the same three phases (flows installed,
removed, reinstalled). A keyless ipv6(proto=132) install must be
refused with EINVAL, pinning the reject side of the match_validate()
rule; without it a regression dropping the requirement would pass
unnoticed. The refusal is asserted to be EINVAL specifically, not a
parse error of the flow string. After the association succeeds the
test also pushes a known payload across and waits for the listener
to log it, proving the datapath carries the association's traffic
end to end, not only its handshake. Skips when the sctp module is
missing, socat lacks SCTP or IPv6 support, or IPv6 is unavailable;
an association or payload failure with the flows installed fails
the test.

Signed-off-by: Minxi Hou <houminxi@gmail.com>
Reviewed-by: Narcisa Vasile <narcisav.kernel@gmail.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260918144647.2024095-2-houminxi@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions