use false case as an alias to detach filter

Author: devnexen

ext/sockets/sockets.c

@@ -512,6 +512,8 @@ static PHP_MINIT_FUNCTION(sockets)
 #endif
 #ifdef SO_ATTACH_REUSEPORT_CBPF
 	REGISTER_LONG_CONSTANT("SO_ATTACH_REUSEPORT_CBPF", SO_ATTACH_REUSEPORT_CBPF, CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("SO_DETACH_FILTER", SO_DETACH_FILTER, CONST_CS | CONST_PERSISTENT);
+	REGISTER_LONG_CONSTANT("SO_DETACH_BPF", SO_DETACH_BPF, CONST_CS | CONST_PERSISTENT);
 #endif
 	REGISTER_LONG_CONSTANT("SO_KEEPALIVE",	SO_KEEPALIVE,	CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SO_DONTROUTE",	SO_DONTROUTE,	CONST_CS | CONST_PERSISTENT);
@@ -2015,7 +2017,8 @@ PHP_FUNCTION(socket_set_option)
 		case SO_ATTACH_REUSEPORT_CBPF: {
 			convert_to_long(arg4);
 			if (!Z_LVAL_P(arg4)) {
-				RETURN_FALSE;
+				optname = SO_DETACH_BPF;
+				goto default_case;
 			}
 			static struct sock_filter cbpf[] = {
 				BPF_STMT((BPF_LD|BPF_W|BPF_ABS), (uint32_t)(SKF_AD_OFF+SKF_AD_CPU)),