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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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3
net/ipv4/sysctl_net_ipv4.c
View file

@ -284,7 +284,8 @@ static int proc_tcp_fastopen_key(struct ctl_table *table, int write,
ret = -EINVAL;
goto bad_key;
}
tcp_fastopen_reset_cipher(net, user_key, TCP_FASTOPEN_KEY_LENGTH);
tcp_fastopen_reset_cipher(net, NULL, user_key,
TCP_FASTOPEN_KEY_LENGTH);
}
bad_key: