Showing the changes to java/pkg/sun/net/sdp/SdpSupport.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2010, 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 | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.net.sdp; | |
| 27 | + | |
| 28 | +import java.io.IOException; | |
| 29 | +import java.io.FileDescriptor; | |
| 30 | +import java.security.AccessController; | |
| 31 | + | |
| 32 | +import sun.misc.SharedSecrets; | |
| 33 | +import sun.misc.JavaIOFileDescriptorAccess; | |
| 34 | + | |
| 35 | + | |
| 36 | +/** | |
| 37 | + * This class defines methods for creating SDP sockets or "converting" existing | |
| 38 | + * file descriptors, referencing (unbound) TCP sockets, to SDP. | |
| 39 | + */ | |
| 40 | + | |
| 41 | +public final class SdpSupport { | |
| 42 | + private static final String os = AccessController | |
| 43 | + .doPrivileged(new sun.security.action.GetPropertyAction("os.name")); | |
| 44 | + private static final boolean isSupported = (os.equals("SunOS") || (os.equals("Linux"))); | |
| 45 | + private static final JavaIOFileDescriptorAccess fdAccess = | |
| 46 | + SharedSecrets.getJavaIOFileDescriptorAccess(); | |
| 47 | + | |
| 48 | + private SdpSupport() { } | |
| 49 | + | |
| 50 | + /** | |
| 51 | + * Creates a SDP socket, returning file descriptor referencing the socket. | |
| 52 | + */ | |
| 53 | + public static FileDescriptor createSocket() throws IOException { | |
| 54 | + if (!isSupported) | |
| 55 | + throw new UnsupportedOperationException("SDP not supported on this platform"); | |
| 56 | + int fdVal = create0(); | |
| 57 | + FileDescriptor fd = new FileDescriptor(); | |
| 58 | + fdAccess.set(fd, fdVal); | |
| 59 | + return fd; | |
| 60 | + } | |
| 61 | + | |
| 62 | + /** | |
| 63 | + * Converts an existing file descriptor, that references an unbound TCP socket, | |
| 64 | + * to SDP. | |
| 65 | + */ | |
| 66 | + public static void convertSocket(FileDescriptor fd) throws IOException { | |
| 67 | + if (!isSupported) | |
| 68 | + throw new UnsupportedOperationException("SDP not supported on this platform"); | |
| 69 | + int fdVal = fdAccess.get(fd); | |
| 70 | + convert0(fdVal); | |
| 71 | + } | |
| 72 | + | |
| 73 | + private static native int create0() throws IOException; | |
| 74 | + | |
| 75 | + private static native void convert0(int fd) throws IOException; | |
| 76 | + | |
| 77 | + static { | |
| 78 | + AccessController.doPrivileged( | |
| 79 | + new sun.security.action.LoadLibraryAction("net")); | |
| 80 | + } | |
| 81 | +} | |