/*
 * Copyright (c) 2010, 2018, 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.
 */

package sun.net.sdp;

import java.io.IOException;
import java.io.FileDescriptor;
import java.security.AccessController;

import jdk.internal.access.SharedSecrets;
import jdk.internal.access.JavaIOFileDescriptorAccess;
import sun.security.action.GetPropertyAction;


This class defines methods for creating SDP sockets or "converting" existing file descriptors, referencing (unbound) TCP sockets, to SDP.
/** * This class defines methods for creating SDP sockets or "converting" existing * file descriptors, referencing (unbound) TCP sockets, to SDP. */
public final class SdpSupport { private static final String os = GetPropertyAction.privilegedGetProperty("os.name"); private static final boolean isSupported = (os.equals("SunOS") || (os.equals("Linux"))); private static final JavaIOFileDescriptorAccess fdAccess = SharedSecrets.getJavaIOFileDescriptorAccess(); private SdpSupport() { }
Creates a SDP socket, returning file descriptor referencing the socket.
/** * Creates a SDP socket, returning file descriptor referencing the socket. */
public static FileDescriptor createSocket() throws IOException { if (!isSupported) throw new UnsupportedOperationException("SDP not supported on this platform"); int fdVal = create0(); FileDescriptor fd = new FileDescriptor(); fdAccess.set(fd, fdVal); return fd; }
Converts an existing file descriptor, that references an unbound TCP socket, to SDP.
/** * Converts an existing file descriptor, that references an unbound TCP socket, * to SDP. */
public static void convertSocket(FileDescriptor fd) throws IOException { if (!isSupported) throw new UnsupportedOperationException("SDP not supported on this platform"); int fdVal = fdAccess.get(fd); convert0(fdVal); } private static native int create0() throws IOException; private static native void convert0(int fd) throws IOException; static { AccessController.doPrivileged( new java.security.PrivilegedAction<Void>() { public Void run() { System.loadLibrary("net"); return null; } }); } }