ext/sockets: following-up on GH-16842, update FreeBSD TCP stack setting.

- `TCP_FUNCTION_ALIAS`: fetches the function pointer name alias (>= 14.0
  only tough).
- `TCP_BBR_ALGORITHM`: set/get the underlying algorithm (0: netflix, 1:
  google) when the BBR's TCP stack is used.
- `TCP_REUSPORT_LB_NUMA`: set;get a NUMA domain filter on the socket.

Author: devnexen

.github/actions/freebsd/action.yml

@@ -13,6 +13,7 @@ runs:
           cd $GITHUB_WORKSPACE
 
           kldload accf_http
+          kldload tcp_bbr
           pkg install -y \
             autoconf \
             bison \

ext/sockets/sockets.c

@@ -1705,7 +1705,11 @@ PHP_FUNCTION(socket_get_option)
 #endif
 
 #ifdef TCP_FUNCTION_BLK
-		case TCP_FUNCTION_BLK: {
+		case TCP_FUNCTION_BLK:
+#ifdef TCP_FUNCTION_ALIAS
+		case TCP_FUNCTION_ALIAS:
+#endif
+		{
 
 			struct tcp_function_set tsf = {0};
 			optlen = sizeof(tsf);

ext/sockets/sockets.stub.php

@@ -647,6 +647,37 @@
  */
 const TCP_FUNCTION_BLK = UNKNOWN;
 #endif
+#ifdef TCP_FUNCTION_ALIAS
+/**
+ * @var int
+ * @cvalue TCP_FUNCTION_ALIAS
+ */
+const TCP_FUNCTION_ALIAS = UNKNOWN;
+#endif
+#ifdef TCP_REUSPORT_LB_NUMA
+/**
+ * @var int
+ * @cvalue TCP_REUSPORT_LB_NUMA
+ */
+const TCP_REUSPORT_LB_NUMA = UNKNOWN;
+/**
+ * @var int
+ * @cvalue TCP_REUSPORT_LB_NUMA_NODOM
+ */
+const TCP_REUSPORT_LB_NUMA_NODOM = UNKNOWN;
+/**
+ * @var int
+ * @cvalue TCP_REUSPORT_LB_NUMA_CURDOM
+ */
+const TCP_REUSPORT_LB_NUMA_CURDOM = UNKNOWN;
+#endif
+#ifdef TCP_BBR_ALGORITHM
+/**
+ * @var int
+ * @cvalue TCP_BBR_ALGORITHM
+ */
+const TCP_BBR_ALGORITHM = UNKNOWN;
+#endif
 /**
  * @var int
  * @cvalue PHP_NORMAL_READ

ext/sockets/sockets_arginfo.h

@@ -17,17 +17,30 @@ if (!$socket) {
         die('Unable to create AF_INET socket [socket]');
 }
 socket_set_option( $socket, SOL_TCP, TCP_FUNCTION_BLK, "nochancetoexist");
-// TCP/RACK and other alternate stacks are not present by default, at least `freebsd` is.
-var_dump(socket_set_option( $socket, SOL_TCP, TCP_FUNCTION_BLK, "freebsd"));
+// TCP/RACK and other alternate stacks are not present by default, BBR should be available.
+var_dump(socket_set_option( $socket, SOL_TCP, TCP_FUNCTION_BLK, "bbr"));
+$bef = socket_get_option( $socket, SOL_TCP, TCP_BBR_ALGORITHM);
+var_dump($bef);
+// not failed, but unchanged
+var_dump(socket_set_option( $socket, SOL_TCP, TCP_BBR_ALGORITHM, 1024));
+$aft = socket_get_option( $socket, SOL_TCP, TCP_BBR_ALGORITHM);
+var_dump($bef === $aft);
+var_dump(socket_set_option( $socket, SOL_TCP, TCP_BBR_ALGORITHM, 0));
 var_dump(socket_get_option( $socket, SOL_TCP, TCP_FUNCTION_BLK));
+var_dump(socket_get_option( $socket, SOL_TCP, TCP_BBR_ALGORITHM));
 socket_close($socket);
 ?>
 --EXPECTF--
 Warning: socket_set_option(): Unable to set socket option [2]: No such file or directory in %s on line %d
 bool(true)
+int(%d)
+bool(true)
+bool(true)
+bool(true)
 array(2) {
   ["function_set_name"]=>
-  string(7) "freebsd"
+  string(3) "bbr"
   ["pcbcnt"]=>
   int(%d)
 }
+int(%d)