On Wed, 2012-07-18 at 14:01 -0700, Yuchung Cheng wrote:

In trusted networks, e.g., intranet, data-center, the client does not
need to use Fast Open cookie to mitigate DoS attacks. In cookie-less
mode, sendmsg() with MSG_FASTOPEN flag will send SYN-data regardless
of cookie availability.

Signed-off-by: Yuchung Cheng <redacted>
---
 Documentation/networking/ip-sysctl.txt |    2 ++
 include/linux/tcp.h                    |    1 +
 include/net/tcp.h                      |    1 +
 net/ipv4/tcp_input.c                   |    8 ++++++--
 net/ipv4/tcp_output.c                  |    6 +++++-
 5 files changed, 15 insertions(+), 3 deletions(-)

Acked-by: Eric Dumazet <edumazet@google.com>