DOC: tfo: bump required kernel to linux-3.7
Support for server side TFO was actually introduced in linux-3.7,
linux-3.6 just has client support.
This patch fixes documentation and a code comment about the
kernel requirement. It also fixes a wrong tfo related code
comment in src/proto_tcp.c.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 49e64c5..70a5188 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -7287,7 +7287,7 @@
See the "crt" option for more information.
tfo
- Is an optional keyword which is supported only on Linux kernels >= 3.6. It
+ Is an optional keyword which is supported only on Linux kernels >= 3.7. It
enables TCP Fast Open on the listening socket, which means that clients which
support this feature will be able to send a request and receive a response
during the 3-way handshake starting from second connection, thus saving one
diff --git a/include/types/listener.h b/include/types/listener.h
index 2f584e3..6e93125 100644
--- a/include/types/listener.h
+++ b/include/types/listener.h
@@ -89,7 +89,7 @@
#define LI_O_CHK_MONNET 0x0020 /* check the source against a monitor-net rule */
#define LI_O_ACC_PROXY 0x0040 /* find the proxied address in the first request line */
#define LI_O_UNLIMITED 0x0080 /* listener not subject to global limits (peers & stats socket) */
-#define LI_O_TCP_FO 0x0100 /* enable TCP Fast Open (linux >= 3.6) */
+#define LI_O_TCP_FO 0x0100 /* enable TCP Fast Open (linux >= 3.7) */
#define LI_O_V6ONLY 0x0200 /* bind to IPv6 only on Linux >= 2.4.21 */
#define LI_O_V4V6 0x0400 /* bind to IPv4/IPv6 on Linux >= 2.4.21 */
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 60b111c..6bd5761 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -1776,7 +1776,7 @@
#endif
#ifdef TCP_FASTOPEN
-/* parse the "defer-accept" bind keyword */
+/* parse the "tfo" bind keyword */
static int bind_parse_tfo(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
{
struct listener *l;