diff options
| author | Yuchung Cheng <ycheng@google.com> | 2012-07-19 06:43:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-19 11:02:03 -0700 |
| commit | 67da22d23fa6f3324e03bcd0580b914b2e4afbf3 (patch) | |
| tree | e794826d1dd7e30cf0885cbe93f22bc050c62359 /include | |
| parent | aab4874355679c70f93993cf3b3fd74643b9ac33 (diff) | |
| download | linux-stable-67da22d23fa6f3324e03bcd0580b914b2e4afbf3.tar.gz linux-stable-67da22d23fa6f3324e03bcd0580b914b2e4afbf3.tar.bz2 linux-stable-67da22d23fa6f3324e03bcd0580b914b2e4afbf3.zip | |
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')
| -rw-r--r-- | include/linux/tcp.h | 1 | ||||
| -rw-r--r-- | include/net/tcp.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 1edf96afab44..9febfb685c33 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -387,6 +387,7 @@ struct tcp_sock { u8 repair_queue; u8 do_early_retrans:1,/* Enable RFC5827 early-retransmit */ early_retrans_delayed:1, /* Delayed ER timer installed */ + syn_data:1, /* SYN includes data */ syn_fastopen:1; /* SYN includes Fast Open option */ /* RTT measurement */ diff --git a/include/net/tcp.h b/include/net/tcp.h index e07878d246aa..bc7c134ec054 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; |