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tcp: socket option to set TCP fast open key

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New socket option TCP_FASTOPEN_KEY to allow different keys per
listener.  The listener by default uses the global key until the
socket option is set.  The key is a 16 bytes long binary data. This
option has no effect on regular non-listener TCP sockets.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng
2017-10-18 11:22:51 -07:00
committed by David S. Miller
parent ce12f7ddff
commit 1fba70e5b6
7 changed files with 82 additions and 19 deletions
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1
net/ipv4/tcp_ipv4.c
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@ -1893,6 +1893,7 @@ void tcp_v4_destroy_sock(struct sock *sk)
/* If socket is aborted during connect operation */
tcp_free_fastopen_req(tp);
tcp_fastopen_destroy_cipher(sk);
tcp_saved_syn_free(tp);
sk_sockets_allocated_dec(sk);