aboutsummaryrefslogtreecommitdiff
path: root/include/net/tcp.h
diff options
context:
space:
mode:
authorYuchung Cheng <ycheng@google.com>2012-07-19 06:43:11 +0000
committerDavid S. Miller <davem@davemloft.net>2012-07-19 11:02:03 -0700
commit67da22d23fa6f3324e03bcd0580b914b2e4afbf3 (patch)
treee794826d1dd7e30cf0885cbe93f22bc050c62359 /include/net/tcp.h
parentaab4874355679c70f93993cf3b3fd74643b9ac33 (diff)
net-tcp: Fast Open client - cookie-less mode
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 <ycheng@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index e07878d246a..bc7c134ec05 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -214,6 +214,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
/* Bit Flags for sysctl_tcp_fastopen */
#define TFO_CLIENT_ENABLE 1
+#define TFO_CLIENT_NO_COOKIE 4 /* Data in SYN w/o cookie option */
extern struct inet_timewait_death_row tcp_death_row;