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tcp: RFC7413 option support for Fast Open server

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Fast Open has been using the experimental option with a magic number
(RFC6994) to request and grant Fast Open cookies. This patch enables
the server to support the official IANA option 34 in RFC7413 in
addition.

The change has passed all existing Fast Open tests with both
old and new options at Google.

Signed-off-by: Daniel Lee <Longinus00@gmail.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lee
2015-04-06 14:37:26 -07:00
committed by David S. Miller
parent 812034f116
commit 7f9b838b71
5 changed files with 57 additions and 23 deletions
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include/linux/tcp.h
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@@ -58,6 +58,7 @@ static inline unsigned int tcp_optlen(const struct sk_buff *skb)
struct tcp_fastopen_cookie {
s8 len;
u8 val[TCP_FASTOPEN_COOKIE_MAX];
bool exp; /* In RFC6994 experimental option format */
};
/* This defines a selective acknowledgement block. */