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package sun.net.sdp;

import java.io.IOException;
import java.io.FileDescriptor;

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("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 { jdk.internal.loader.BootLoader.loadLibrary("net"); } }