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78 lines
2.8 KiB
Java
78 lines
2.8 KiB
Java
/*
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* Copyright (c) 2010, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.net.sdp;
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import java.io.IOException;
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import java.io.FileDescriptor;
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import jdk.internal.access.SharedSecrets;
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import jdk.internal.access.JavaIOFileDescriptorAccess;
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import jdk.internal.util.OperatingSystem;
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/**
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* This class defines methods for creating SDP sockets or "converting" existing
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* file descriptors, referencing (unbound) TCP sockets, to SDP.
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*/
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public final class SdpSupport {
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private static final boolean isSupported = OperatingSystem.isLinux();
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private static final JavaIOFileDescriptorAccess fdAccess =
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SharedSecrets.getJavaIOFileDescriptorAccess();
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private SdpSupport() { }
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/**
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* Creates a SDP socket, returning file descriptor referencing the socket.
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*/
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public static FileDescriptor createSocket() throws IOException {
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if (!isSupported)
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throw new UnsupportedOperationException("SDP not supported on this platform");
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int fdVal = create0();
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FileDescriptor fd = new FileDescriptor();
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fdAccess.set(fd, fdVal);
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return fd;
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}
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/**
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* Converts an existing file descriptor, that references an unbound TCP socket,
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* to SDP.
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*/
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public static void convertSocket(FileDescriptor fd) throws IOException {
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if (!isSupported)
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throw new UnsupportedOperationException("SDP not supported on this platform");
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int fdVal = fdAccess.get(fd);
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convert0(fdVal);
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}
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private static native int create0() throws IOException;
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private static native void convert0(int fd) throws IOException;
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static {
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jdk.internal.loader.BootLoader.loadLibrary("net");
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}
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}
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