1 /*
2 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
478 if (type == Integer.class) {
479 return Integer.valueOf(value);
480 } else {
481 return (value == 0) ? Boolean.FALSE : Boolean.TRUE;
482 }
483 }
484
485 public static boolean isFastTcpLoopbackRequested() {
486 String loopbackProp = GetPropertyAction
487 .privilegedGetProperty("jdk.net.useFastTcpLoopback", "false");
488 return loopbackProp.isEmpty() ? true : Boolean.parseBoolean(loopbackProp);
489 }
490
491 // -- Socket operations --
492
493 private static native boolean isIPv6Available0();
494
495 private static native boolean isReusePortAvailable0();
496
497 /*
498 * Returns 1 for Windows and -1 for Solaris/Linux/Mac OS
499 */
500 private static native int isExclusiveBindAvailable();
501
502 private static native boolean shouldSetBothIPv4AndIPv6Options0();
503
504 private static native boolean canIPv6SocketJoinIPv4Group0();
505
506 private static native boolean canJoin6WithIPv4Group0();
507
508 private static native boolean canUseIPv6OptionsWithIPv4LocalAddress0();
509
510 static FileDescriptor socket(boolean stream) throws IOException {
511 return socket(UNSPEC, stream);
512 }
513
514 static FileDescriptor socket(ProtocolFamily family, boolean stream) throws IOException {
515 boolean preferIPv6 = isIPv6Available() &&
516 (family != StandardProtocolFamily.INET);
517 return IOUtil.newFD(socket0(preferIPv6, stream, false, fastLoopback));
518 }
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1 /*
2 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
478 if (type == Integer.class) {
479 return Integer.valueOf(value);
480 } else {
481 return (value == 0) ? Boolean.FALSE : Boolean.TRUE;
482 }
483 }
484
485 public static boolean isFastTcpLoopbackRequested() {
486 String loopbackProp = GetPropertyAction
487 .privilegedGetProperty("jdk.net.useFastTcpLoopback", "false");
488 return loopbackProp.isEmpty() ? true : Boolean.parseBoolean(loopbackProp);
489 }
490
491 // -- Socket operations --
492
493 private static native boolean isIPv6Available0();
494
495 private static native boolean isReusePortAvailable0();
496
497 /*
498 * Returns 1 for Windows and -1 for Linux/Mac OS
499 */
500 private static native int isExclusiveBindAvailable();
501
502 private static native boolean shouldSetBothIPv4AndIPv6Options0();
503
504 private static native boolean canIPv6SocketJoinIPv4Group0();
505
506 private static native boolean canJoin6WithIPv4Group0();
507
508 private static native boolean canUseIPv6OptionsWithIPv4LocalAddress0();
509
510 static FileDescriptor socket(boolean stream) throws IOException {
511 return socket(UNSPEC, stream);
512 }
513
514 static FileDescriptor socket(ProtocolFamily family, boolean stream) throws IOException {
515 boolean preferIPv6 = isIPv6Available() &&
516 (family != StandardProtocolFamily.INET);
517 return IOUtil.newFD(socket0(preferIPv6, stream, false, fastLoopback));
518 }
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