path: root/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c (follow)
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2019-07-30selftests/bpf: add test for bpf_tcp_gen_syncookiePetar Penkov1-8/+53
Modify the existing bpf_tcp_check_syncookie test to also generate a SYN cookie, pass the packet to the kernel, and verify that the two cookies are the same (and both valid). Since cloned SKBs are skipped during generic XDP, this test does not issue a SYN cookie when run in XDP mode. We therefore only check that a valid SYN cookie was issued at the TC hook. Additionally, verify that the MSS for that SYN cookie is within expected range. Signed-off-by: Petar Penkov <ppenkov@google.com> Reviewed-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-21selftests/bpf: add tests for bpf_tcp_check_syncookie and bpf_skc_lookup_tcpLorenz Bauer1-0/+212
Add tests which verify that the new helpers work for both IPv4 and IPv6, by forcing SYN cookies to always on. Use a new network namespace to avoid clobbering the global SYN cookie settings. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>