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8a5cd98602
btf_skc_cls_ingress test currently checks that syncookie and bpf_sk_assign/release helpers behave correctly in multiple scenarios, but only with ipv6 socket. Increase those helpers coverage by adding testing support for IPv4 sockets and IPv4/IPv6 sockets. The rework is mostly based on features brought earlier in test_tcp_check_syncookie.sh to cover some fixes performed on those helpers, but test_tcp_check_syncookie.sh is not integrated in test_progs. The most notable changes linked to this are: - some rework in the corresponding eBPF program to support both types of traffic - the switch from start_server to start_server_str to allow to check some socket options - the introduction of new subtests for ipv4 and ipv4/ipv6 Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Link: https://lore.kernel.org/r/20241020-syncookie-v2-4-2db240225fed@bootlin.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>