--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/windows/native/libnet/portconfig.c Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <windows.h>
+#include "jni.h"
+#include "net_util.h"
+#include "sun_net_PortConfig.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct portrange {
+ int lower;
+ int higher;
+};
+
+static int getPortRange(struct portrange *range)
+{
+ OSVERSIONINFO ver;
+ ver.dwOSVersionInfoSize = sizeof(ver);
+ GetVersionEx(&ver);
+
+ /* Check for major version 5 or less = Windows XP/2003 or older */
+ if (ver.dwMajorVersion <= 5) {
+ LONG ret;
+ HKEY hKey;
+ range->lower = 1024;
+ range->higher = 4999;
+
+ /* check registry to see if upper limit was raised */
+ ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
+ "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters",
+ 0, KEY_READ, (PHKEY)&hKey
+ );
+ if (ret == ERROR_SUCCESS) {
+ DWORD maxuserport;
+ ULONG ulType;
+ DWORD dwLen = sizeof(maxuserport);
+ ret = RegQueryValueEx(hKey, "MaxUserPort", NULL, &ulType,
+ (LPBYTE)&maxuserport, &dwLen);
+ RegCloseKey(hKey);
+ if (ret == ERROR_SUCCESS) {
+ range->higher = maxuserport;
+ }
+ }
+ } else {
+ /* There doesn't seem to be an API to access this. "MaxUserPort"
+ * is affected, but is not sufficient to determine.
+ * so we just use the defaults, which are less likely to change
+ */
+ range->lower = 49152;
+ range->higher = 65535;
+ }
+ return 0;
+}
+
+/*
+ * Class: sun_net_PortConfig
+ * Method: getLower0
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getLower0
+ (JNIEnv *env, jclass clazz)
+{
+ struct portrange range;
+ getPortRange(&range);
+ return range.lower;
+}
+
+/*
+ * Class: sun_net_PortConfig
+ * Method: getUpper0
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_sun_net_PortConfig_getUpper0
+ (JNIEnv *env, jclass clazz)
+{
+ struct portrange range;
+ getPortRange(&range);
+ return range.higher;
+}
+#ifdef __cplusplus
+}
+#endif