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authorPetar Penkov <ppenkov@google.com>2019-07-29 09:59:15 -0700
committerAlexei Starovoitov <ast@kernel.org>2019-07-30 21:03:05 -0700
commit70d66244317e958092e9c971b08dd5b7fd29d9cb (patch)
treece2f9693389e7084cdf245f1a39e3787dcfccdb2 /tools/include
parent9349d600fb6a1ca0aaeb515523e1bb5409483d76 (diff)
bpf: add bpf_tcp_gen_syncookie helper
This helper function allows BPF programs to try to generate SYN cookies, given a reference to a listener socket. The function works from XDP and with an skb context since bpf_skc_lookup_tcp can lookup a socket in both cases. Signed-off-by: Petar Penkov <ppenkov@google.com> Suggested-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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