summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--man/systemd.socket.xml15
-rw-r--r--src/core/dbus-socket.c1
-rw-r--r--src/core/load-fragment-gperf.gperf.m41
-rw-r--r--src/core/socket.c8
-rw-r--r--src/core/socket.h1
5 files changed, 26 insertions, 0 deletions
diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml
index 352825f580..170d010f60 100644
--- a/man/systemd.socket.xml
+++ b/man/systemd.socket.xml
@@ -499,6 +499,21 @@
</varlistentry>
<varlistentry>
+ <term><varname>FastOpen=</varname></term>
+ <listitem><para>Takes a boolean
+ argument. It works by using a TFO cookie (a TCP option) in the initial
+ SYN packet to authenticate a previously connected client. If successful,
+ it may start sending data to the client before the receipt of the final
+ ACK packet of the three way handshake is received, skipping a round trip
+ and lowering the latency in the start of transmission of data.
+ This controls the TCP_FASTOPEN socket option (see
+ the <ulink url="http://lwn.net/Articles/508865/">TCP
+ Fast Open: expediting web services</ulink> for details.)
+ Defaults to
+ <option>false</option>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><varname>Priority=</varname></term>
<listitem><para>Takes an integer
argument controlling the priority for
diff --git a/src/core/dbus-socket.c b/src/core/dbus-socket.c
index ad135a1ac2..71c0115ab4 100644
--- a/src/core/dbus-socket.c
+++ b/src/core/dbus-socket.c
@@ -97,6 +97,7 @@ const sd_bus_vtable bus_socket_vtable[] = {
SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Socket, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Accept", "b", bus_property_get_bool, offsetof(Socket, accept), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("KeepAlive", "b", bus_property_get_bool, offsetof(Socket, keep_alive), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("FastOpen" , "b", bus_property_get_bool, offsetof(Socket, fast_open), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Priority", "i", bus_property_get_int, offsetof(Socket, priority), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("ReceiveBuffer", "t", bus_property_get_size, offsetof(Socket, receive_buffer), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("SendBuffer", "t", bus_property_get_size, offsetof(Socket, send_buffer), SD_BUS_VTABLE_PROPERTY_CONST),
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index f4acdda22a..08d05937f5 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -232,6 +232,7 @@ Socket.Accept, config_parse_bool, 0,
Socket.MaxConnections, config_parse_unsigned, 0, offsetof(Socket, max_connections)
Socket.KeepAlive, config_parse_bool, 0, offsetof(Socket, keep_alive)
Socket.NoDelay, config_parse_bool, 0, offsetof(Socket, no_delay)
+Socket.FastOpen, config_parse_bool, 0, offsetof(Socket, fast_open)
Socket.Priority, config_parse_int, 0, offsetof(Socket, priority)
Socket.ReceiveBuffer, config_parse_iec_size, 0, offsetof(Socket, receive_buffer)
Socket.SendBuffer, config_parse_iec_size, 0, offsetof(Socket, send_buffer)
diff --git a/src/core/socket.c b/src/core/socket.c
index 5af15964ff..44827ad346 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -481,6 +481,7 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
"%sDirectoryMode: %04o\n"
"%sKeepAlive: %s\n"
"%sNoDelay: %s\n"
+ "%sFastOpen: %s\n"
"%sFreeBind: %s\n"
"%sTransparent: %s\n"
"%sBroadcast: %s\n"
@@ -496,6 +497,7 @@ static void socket_dump(Unit *u, FILE *f, const char *prefix) {
prefix, s->directory_mode,
prefix, yes_no(s->keep_alive),
prefix, yes_no(s->no_delay),
+ prefix, yes_no(s->fast_open),
prefix, yes_no(s->free_bind),
prefix, yes_no(s->transparent),
prefix, yes_no(s->broadcast),
@@ -798,6 +800,12 @@ static void socket_apply_socket_options(Socket *s, int fd) {
log_warning_unit(UNIT(s)->id, "TCP_NODELAY failed: %m");
}
+ if (s->fast_open) {
+ int b = s->fast_open;
+ if (setsockopt(fd, SOL_TCP, TCP_FASTOPEN, &b, sizeof(b)) < 0)
+ log_warning_unit(UNIT(s)->id, "TCP_FASTOPEN failed: %m");
+ }
+
if (s->broadcast) {
int one = 1;
if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) < 0)
diff --git a/src/core/socket.h b/src/core/socket.h
index 98396e7320..6c0084c477 100644
--- a/src/core/socket.h
+++ b/src/core/socket.h
@@ -135,6 +135,7 @@ struct Socket {
/* Socket options */
bool keep_alive;
bool no_delay;
+ bool fast_open;
bool free_bind;
bool transparent;
bool broadcast;