src/org/sipdroid/net/impl/OSNetworkSystem.java
changeset 823 2036ebfaccda
child 834 e8d6255306f8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/sipdroid/net/impl/OSNetworkSystem.java	Fri Nov 20 19:29:42 2009 +0100
@@ -0,0 +1,748 @@
+/*
+ * Copyright (C) 2009 The Sipdroid Open Source Project
+ * 
+ * This file is part of Sipdroid (http://www.sipdroid.org)
+ * 
+ * Sipdroid is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This source 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 for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this source code; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+// BEGIN android-note
+// address length was changed from long to int for performance reasons.
+// END android-note
+
+package org.sipdroid.net.impl;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.net.SocketImpl;
+import java.net.UnknownHostException;
+import java.nio.channels.Channel;
+// BEGIN android-removed
+// import java.nio.channels.SelectableChannel;
+// END android-removed
+/*
+ * 
+ * This Class is used for native code wrap, the implement class of
+ * INetworkSystem.
+ * 
+ */
+public final class OSNetworkSystem {
+
+    // ----------------------------------------------------
+    // Class Variables
+    // ----------------------------------------------------
+
+    private static final int ERRORCODE_SOCKET_TIMEOUT = -209;
+
+    private static OSNetworkSystem ref = new OSNetworkSystem();
+    
+    private static final int INETADDR_REACHABLE = 0;
+    
+    private static boolean isNetworkInited = false;
+    
+    // ----------------------------------------------------
+    // Class Constructor
+    // ----------------------------------------------------
+
+    // can not be instantiated.
+    private OSNetworkSystem() {
+        super();
+    }
+
+    /*
+     * @return a static ref of this class
+     */
+    public static OSNetworkSystem getOSNetworkSystem() {
+        return ref;
+    }
+
+    // Useing when cache set/get is OK
+    // public static native void oneTimeInitializationDatagram(
+    // boolean jcl_IPv6_support);
+    //
+    // public static native void oneTimeInitializationSocket(
+    // boolean jcl_IPv6_support);
+
+    // --------------------------------------------------
+    // java codes that wrap native codes
+    // --------------------------------------------------
+
+    public void createSocket(FileDescriptor fd, boolean preferIPv4Stack)
+            throws IOException {
+        createSocketImpl(fd, preferIPv4Stack);
+    }
+
+    public void createDatagramSocket(FileDescriptor fd, boolean preferIPv4Stack)
+            throws SocketException {
+        createDatagramSocketImpl(fd, preferIPv4Stack);
+    }
+
+    public int read(FileDescriptor aFD, byte[] data, int offset, int count,
+            int timeout) throws IOException {
+        return readSocketImpl(aFD, data, offset, count, timeout);
+    }
+    
+    public int readDirect(FileDescriptor aFD, int address, int offset, int count,
+            int timeout) throws IOException {
+        return readSocketDirectImpl(aFD, address, offset, count, timeout);
+    }
+
+    public int write(FileDescriptor aFD, byte[] data, int offset, int count)
+            throws IOException {
+        return writeSocketImpl(aFD, data, offset, count);
+    }
+    
+    public int writeDirect(FileDescriptor aFD, int address, int offset,
+            int count) throws IOException {
+        return writeSocketDirectImpl(aFD, address, offset, count);
+    }
+
+    public void setNonBlocking(FileDescriptor aFD, boolean block)
+            throws IOException {
+        setNonBlockingImpl(aFD, block);
+    }
+
+    public void connectDatagram(FileDescriptor aFD, int port, int trafficClass,
+            InetAddress inetAddress) throws SocketException {
+        connectDatagramImpl2(aFD, port, trafficClass, inetAddress);
+    }
+
+    public int connect(FileDescriptor aFD, int trafficClass,
+            InetAddress inetAddress, int port)  throws IOException{
+        return connectSocketImpl(aFD, trafficClass, inetAddress, port);
+    }
+
+    // BEGIN android-changed
+    public int connectWithTimeout(FileDescriptor aFD, int timeout,
+            int trafficClass, InetAddress inetAddress, int port, int step,
+            byte[] context)  throws IOException{
+        return connectWithTimeoutSocketImpl(aFD, timeout, trafficClass,
+                inetAddress, port, step, context);
+    }
+    // END android-changed
+
+    public void connectStreamWithTimeoutSocket(FileDescriptor aFD, int aport,
+            int timeout, int trafficClass, InetAddress inetAddress)
+            throws IOException {
+        connectStreamWithTimeoutSocketImpl(aFD, aport, timeout, trafficClass,
+                inetAddress);
+    }
+
+    public void bind(FileDescriptor aFD, int port, InetAddress inetAddress)
+            throws SocketException {
+        socketBindImpl(aFD, port, inetAddress);
+    }
+
+    public boolean bind2(FileDescriptor aFD, int port, boolean bindToDevice,
+            InetAddress inetAddress) throws SocketException {
+        return socketBindImpl2(aFD, port, bindToDevice, inetAddress);
+    }
+
+    public void accept(FileDescriptor fdServer, SocketImpl newSocket,
+            FileDescriptor fdnewSocket, int timeout) throws IOException {
+        acceptSocketImpl(fdServer, newSocket, fdnewSocket, timeout);
+    }
+
+    public int sendDatagram(FileDescriptor fd, byte[] data, int offset,
+            int length, int port, boolean bindToDevice, int trafficClass,
+            InetAddress inetAddress) throws IOException {
+        return sendDatagramImpl(fd, data, offset, length, port, bindToDevice,
+                trafficClass, inetAddress);
+    }
+    
+    public int sendDatagramDirect(FileDescriptor fd, int address, int offset,
+            int length, int port, boolean bindToDevice, int trafficClass,
+            InetAddress inetAddress) throws IOException {
+        return sendDatagramDirectImpl(fd, address, offset, length, port, bindToDevice,
+                trafficClass, inetAddress);
+    }
+
+    public int sendDatagram2(FileDescriptor fd, byte[] data, int offset,
+            int length, int port, InetAddress inetAddress) throws IOException {
+        return sendDatagramImpl2(fd, data, offset, length, port, inetAddress);
+    }
+
+    public int receiveDatagram(FileDescriptor aFD, DatagramPacket packet,
+            byte[] data, int offset, int length, int receiveTimeout,
+            boolean peek) throws IOException {
+        return receiveDatagramImpl(aFD, packet, data, offset, length,
+                receiveTimeout, peek);
+    }
+    
+    public int receiveDatagramDirect(FileDescriptor aFD, DatagramPacket packet,
+            int address, int offset, int length, int receiveTimeout,
+            boolean peek) throws IOException {
+        return receiveDatagramDirectImpl(aFD, packet, address, offset, length,
+                receiveTimeout, peek);
+    }
+
+    public int recvConnectedDatagram(FileDescriptor aFD, DatagramPacket packet,
+            byte[] data, int offset, int length, int receiveTimeout,
+            boolean peek) throws IOException {
+        return recvConnectedDatagramImpl(aFD, packet, data, offset, length,
+                receiveTimeout, peek);
+    }
+    
+    public int recvConnectedDatagramDirect(FileDescriptor aFD, DatagramPacket packet, int address,
+             int offset, int length, int receiveTimeout, boolean peek)
+            throws IOException {
+        return recvConnectedDatagramDirectImpl(aFD, packet, address, offset, length, receiveTimeout, peek);
+    }
+
+    public int peekDatagram(FileDescriptor aFD, InetAddress sender,
+            int receiveTimeout) throws IOException {
+        return peekDatagramImpl(aFD, sender, receiveTimeout);
+    }
+
+    public int sendConnectedDatagram(FileDescriptor fd, byte[] data,
+            int offset, int length, boolean bindToDevice) throws IOException {
+        return sendConnectedDatagramImpl(fd, data, offset, length, bindToDevice);
+    }
+    
+    public int sendConnectedDatagramDirect(FileDescriptor fd, int address,
+            int offset, int length, boolean bindToDevice) throws IOException {
+        return sendConnectedDatagramDirectImpl(fd, address, offset, length, bindToDevice);
+    }
+
+    public void disconnectDatagram(FileDescriptor aFD) throws SocketException {
+        disconnectDatagramImpl(aFD);
+    }
+
+    public void createMulticastSocket(FileDescriptor aFD,
+            boolean preferIPv4Stack) throws SocketException {
+        createMulticastSocketImpl(aFD, preferIPv4Stack);
+    }
+
+    public void createServerStreamSocket(FileDescriptor aFD,
+            boolean preferIPv4Stack) throws SocketException {
+        createServerStreamSocketImpl(aFD, preferIPv4Stack);
+    }
+
+    public int receiveStream(FileDescriptor aFD, byte[] data, int offset,
+            int count, int timeout) throws IOException {
+        return receiveStreamImpl(aFD, data, offset, count, timeout);
+    }
+
+    public int sendStream(FileDescriptor fd, byte[] data, int offset, int count)
+            throws IOException {
+        return sendStreamImpl(fd, data, offset, count);
+    }
+
+    public void shutdownInput(FileDescriptor descriptor) throws IOException {
+        shutdownInputImpl(descriptor);
+    }
+
+    public void shutdownOutput(FileDescriptor descriptor) throws IOException {
+        shutdownOutputImpl(descriptor);
+    }
+
+    public boolean supportsUrgentData(FileDescriptor fd) {
+        return supportsUrgentDataImpl(fd);
+    }
+
+    public void sendUrgentData(FileDescriptor fd, byte value) {
+        sendUrgentDataImpl(fd, value);
+    }
+
+    public int availableStream(FileDescriptor aFD) throws SocketException {
+        return availableStreamImpl(aFD);
+    }
+
+    // BEGIN android-removed
+    // public void acceptStreamSocket(FileDescriptor fdServer,
+    //         SocketImpl newSocket, FileDescriptor fdnewSocket, int timeout)
+    //         throws IOException {
+    //     acceptStreamSocketImpl(fdServer, newSocket, fdnewSocket, timeout);
+    // }
+    // 
+    // public void createStreamSocket(FileDescriptor aFD, boolean preferIPv4Stack)
+    //         throws SocketException {
+    //     createStreamSocketImpl(aFD, preferIPv4Stack);
+    // }
+    // END android-removed
+
+    public void listenStreamSocket(FileDescriptor aFD, int backlog)
+            throws SocketException {
+        listenStreamSocketImpl(aFD, backlog);
+    }
+    
+    // BEGIN android-removed
+    // public boolean isReachableByICMP(final InetAddress dest,
+    //         InetAddress source, final int ttl, final int timeout) {
+    //     return INETADDR_REACHABLE == isReachableByICMPImpl(dest, source, ttl,
+    //             timeout);
+    // }
+    // END android-removed
+
+    /*
+     * 
+     * @param 
+     *      readChannels all channels interested in read and accept 
+     * @param
+     *      writeChannels all channels interested in write and connect 
+     * @param timeout
+     *      timeout in millis @return a set of channels that are ready for operation
+     * @throws 
+     *      SocketException @return int array, each int approve one of the     * channel if OK
+     */
+
+    public int[] select(FileDescriptor[] readFDs,
+            FileDescriptor[] writeFDs, long timeout)
+            throws SocketException {
+        int countRead = readFDs.length;
+        int countWrite = writeFDs.length;
+        int result = 0;
+        if (0 == countRead + countWrite) {
+            return (new int[0]);
+        }
+        int[] flags = new int[countRead + countWrite];
+
+        // handle timeout in native
+        result = selectImpl(readFDs, writeFDs, countRead, countWrite, flags,
+                timeout);
+
+        if (0 <= result) {
+            return flags;
+        }
+        if (ERRORCODE_SOCKET_TIMEOUT == result) {
+            return new int[0];
+        }
+        throw new SocketException();
+
+    }
+
+    public InetAddress getSocketLocalAddress(FileDescriptor aFD,
+            boolean preferIPv6Addresses) {
+        return getSocketLocalAddressImpl(aFD, preferIPv6Addresses);
+    }
+
+    /*
+     * Query the IP stack for the local port to which this socket is bound.
+     * 
+     * @param aFD the socket descriptor @param preferIPv6Addresses address
+     * preference for nodes that support both IPv4 and IPv6 @return int the
+     * local port to which the socket is bound
+     */
+    public int getSocketLocalPort(FileDescriptor aFD,
+            boolean preferIPv6Addresses) {
+        return getSocketLocalPortImpl(aFD, preferIPv6Addresses);
+    }
+
+    /*
+     * Query the IP stack for the nominated socket option.
+     * 
+     * @param aFD the socket descriptor @param opt the socket option type
+     * @return the nominated socket option value
+     * 
+     * @throws SocketException if the option is invalid
+     */
+    public Object getSocketOption(FileDescriptor aFD, int opt)
+            throws SocketException {
+        return getSocketOptionImpl(aFD, opt);
+    }
+
+    /*
+     * Set the nominated socket option in the IP stack.
+     * 
+     * @param aFD the socket descriptor @param opt the option selector @param
+     * optVal the nominated option value
+     * 
+     * @throws SocketException if the option is invalid or cannot be set
+     */
+    public void setSocketOption(FileDescriptor aFD, int opt, Object optVal)
+            throws SocketException {
+        setSocketOptionImpl(aFD, opt, optVal);
+    }
+
+    public int getSocketFlags() {
+        return getSocketFlagsImpl();
+    }
+
+    /*
+     * Close the socket in the IP stack.
+     * 
+     * @param aFD the socket descriptor
+     */
+    public void socketClose(FileDescriptor aFD) throws IOException {
+        socketCloseImpl(aFD);
+    }
+
+    public InetAddress getHostByAddr(byte[] addr) throws UnknownHostException {
+        return getHostByAddrImpl(addr);
+    }
+
+    public InetAddress getHostByName(String addr, boolean preferIPv6Addresses)
+            throws UnknownHostException {
+        return getHostByNameImpl(addr, preferIPv6Addresses);
+    }
+
+    public void setInetAddress(InetAddress sender, byte[] address) {
+        setInetAddressImpl(sender, address);
+    }
+
+    // ---------------------------------------------------
+    // Native Codes
+    // ---------------------------------------------------
+
+    static native void createSocketImpl(FileDescriptor fd,
+            boolean preferIPv4Stack);
+
+    /*
+     * Allocate a datagram socket in the IP stack. The socket is associated with
+     * the <code>aFD</code>.
+     * 
+     * @param aFD the FileDescriptor to associate with the socket @param
+     * preferIPv4Stack IP stack preference if underlying platform is V4/V6
+     * @exception SocketException upon an allocation error
+     */
+    static native void createDatagramSocketImpl(FileDescriptor aFD,
+            boolean preferIPv4Stack) throws SocketException;
+
+    static native int readSocketImpl(FileDescriptor aFD, byte[] data,
+            int offset, int count, int timeout) throws IOException;
+    
+    static native int readSocketDirectImpl(FileDescriptor aFD, int address,
+            int offset, int count, int timeout) throws IOException;
+
+    static native int writeSocketImpl(FileDescriptor fd, byte[] data,
+            int offset, int count) throws IOException;
+    
+    static native int writeSocketDirectImpl(FileDescriptor fd, int address,
+            int offset, int count) throws IOException;
+
+    static native void setNonBlockingImpl(FileDescriptor aFD,
+            boolean block);
+
+    static native int connectSocketImpl(FileDescriptor aFD,
+            int trafficClass, InetAddress inetAddress, int port);
+
+    // BEGIN android-changed
+    static native int connectWithTimeoutSocketImpl(
+            FileDescriptor aFD, int timeout, int trafficClass,
+            InetAddress hostname, int port, int step, byte[] context);
+    // END android-changed
+
+    static native void connectStreamWithTimeoutSocketImpl(FileDescriptor aFD,
+            int aport, int timeout, int trafficClass, InetAddress inetAddress)
+            throws IOException;
+
+    static native void socketBindImpl(FileDescriptor aFD, int port,
+            InetAddress inetAddress) throws SocketException;
+
+    static native void listenStreamSocketImpl(FileDescriptor aFD, int backlog)
+            throws SocketException;
+
+    static native int availableStreamImpl(FileDescriptor aFD)
+            throws SocketException;
+
+    static native void acceptSocketImpl(FileDescriptor fdServer,
+            SocketImpl newSocket, FileDescriptor fdnewSocket, int timeout)
+            throws IOException;
+
+    static native boolean supportsUrgentDataImpl(FileDescriptor fd);
+
+    static native void sendUrgentDataImpl(FileDescriptor fd, byte value);
+
+    /*
+     * Connect the socket to a port and address
+     * 
+     * @param aFD the FileDescriptor to associate with the socket @param port
+     * the port to connect to @param trafficClass the traffic Class to be used
+     * then the connection is made @param inetAddress address to connect to.
+     * 
+     * @exception SocketException if the connect fails
+     */
+    static native void connectDatagramImpl2(FileDescriptor aFD,
+            int port, int trafficClass, InetAddress inetAddress)
+            throws SocketException;
+
+    /*
+     * Disconnect the socket to a port and address
+     * 
+     * @param aFD the FileDescriptor to associate with the socket
+     * 
+     * @exception SocketException if the disconnect fails
+     */
+    static native void disconnectDatagramImpl(FileDescriptor aFD)
+            throws SocketException;
+
+    /*
+     * Allocate a datagram socket in the IP stack. The socket is associated with
+     * the <code>aFD</code>.
+     * 
+     * @param aFD the FileDescriptor to associate with the socket @param
+     * preferIPv4Stack IP stack preference if underlying platform is V4/V6
+     * @exception SocketException upon an allocation error
+     */
+
+    /*
+     * Bind the socket to the port/localhost in the IP stack.
+     * 
+     * @param aFD the socket descriptor @param port the option selector @param
+     * bindToDevice bind the socket to the specified interface @param
+     * inetAddress address to connect to. @return if bind successful @exception
+     * SocketException thrown if bind operation fails
+     */
+    static native boolean socketBindImpl2(FileDescriptor aFD,
+            int port, boolean bindToDevice, InetAddress inetAddress)
+            throws SocketException;
+
+    /*
+     * Peek on the socket, update <code>sender</code> address and answer the
+     * sender port.
+     * 
+     * @param aFD the socket FileDescriptor @param sender an InetAddress, to be
+     * updated with the sender's address @param receiveTimeout the maximum
+     * length of time the socket should block, reading @return int the sender
+     * port
+     * 
+     * @exception IOException upon an read error or timeout
+     */
+    static native int peekDatagramImpl(FileDescriptor aFD,
+            InetAddress sender, int receiveTimeout) throws IOException;
+
+    /*
+     * Recieve data on the socket into the specified buffer. The packet fields
+     * <code>data</code> & <code>length</code> are passed in addition to
+     * <code>packet</code> to eliminate the JNI field access calls.
+     * 
+     * @param aFD the socket FileDescriptor @param packet the DatagramPacket to
+     * receive into @param data the data buffer of the packet @param offset the
+     * offset in the data buffer @param length the length of the data buffer in
+     * the packet @param receiveTimeout the maximum length of time the socket
+     * should block, reading @param peek indicates to peek at the data @return
+     * number of data received @exception IOException upon an read error or
+     * timeout
+     */
+    static native int receiveDatagramImpl(FileDescriptor aFD,
+            DatagramPacket packet, byte[] data, int offset, int length,
+            int receiveTimeout, boolean peek) throws IOException;
+    
+    static native int receiveDatagramDirectImpl(FileDescriptor aFD,
+            DatagramPacket packet, int address, int offset, int length,
+            int receiveTimeout, boolean peek) throws IOException;
+
+    /*
+     * Recieve data on the connected socket into the specified buffer. The
+     * packet fields <code>data</code> & <code>length</code> are passed in
+     * addition to <code>packet</code> to eliminate the JNI field access
+     * calls.
+     * 
+     * @param aFD the socket FileDescriptor @param packet the DatagramPacket to
+     * receive into @param data the data buffer of the packet @param offset the
+     * offset in the data buffer @param length the length of the data buffer in
+     * the packet @param receiveTimeout the maximum length of time the socket
+     * should block, reading @param peek indicates to peek at the data @return
+     * number of data received @exception IOException upon an read error or
+     * timeout
+     */
+    static native int recvConnectedDatagramImpl(FileDescriptor aFD,
+            DatagramPacket packet, byte[] data, int offset, int length,
+            int receiveTimeout, boolean peek) throws IOException;
+    
+    static native int recvConnectedDatagramDirectImpl(FileDescriptor aFD,
+            DatagramPacket packet, int address, int offset, int length,
+            int receiveTimeout, boolean peek) throws IOException;
+
+    /*
+     * Send the <code>data</code> to the nominated target <code>address</code>
+     * and <code>port</code>. These values are derived from the
+     * DatagramPacket to reduce the field calls within JNI.
+     * 
+     * @param fd the socket FileDescriptor @param data the data buffer of the
+     * packet @param offset the offset in the data buffer @param length the
+     * length of the data buffer in the packet @param port the target host port
+     * @param bindToDevice if bind to device @param trafficClass the traffic
+     * class to be used when the datagram is sent @param inetAddress address to
+     * connect to. @return number of data send
+     * 
+     * @exception IOException upon an read error or timeout
+     */
+    static native int sendDatagramImpl(FileDescriptor fd,
+            byte[] data, int offset, int length, int port,
+            boolean bindToDevice, int trafficClass, InetAddress inetAddress)
+            throws IOException;
+    
+    static native int sendDatagramDirectImpl(FileDescriptor fd,
+            int address, int offset, int length, int port,
+            boolean bindToDevice, int trafficClass, InetAddress inetAddress)
+            throws IOException;
+
+    /*
+     * Send the <code>data</code> to the address and port to which the was
+     * connnected and <code>port</code>.
+     * 
+     * @param fd the socket FileDescriptor @param data the data buffer of the
+     * packet @param offset the offset in the data buffer @param length the
+     * length of the data buffer in the packet @param bindToDevice not used,
+     * current kept in case needed as was the case for sendDatagramImpl @return
+     * number of data send @exception IOException upon an read error or timeout
+     */
+    static native int sendConnectedDatagramImpl(FileDescriptor fd,
+            byte[] data, int offset, int length, boolean bindToDevice)
+            throws IOException;
+    
+    static native int sendConnectedDatagramDirectImpl(FileDescriptor fd,
+            int address, int offset, int length, boolean bindToDevice)
+            throws IOException;
+
+    /*
+     * Answer the result of attempting to create a server stream socket in the
+     * IP stack. Any special options required for server sockets will be set by
+     * this method.
+     * 
+     * @param aFD the socket FileDescriptor @param preferIPv4Stack if use IPV4
+     * @exception SocketException if an error occurs while creating the socket
+     */
+    static native void createServerStreamSocketImpl(FileDescriptor aFD,
+            boolean preferIPv4Stack) throws SocketException;
+
+    /*
+     * Answer the result of attempting to create a multicast socket in the IP
+     * stack. Any special options required for server sockets will be set by
+     * this method.
+     * 
+     * @param aFD the socket FileDescriptor @param preferIPv4Stack if use IPV4
+     * @exception SocketException if an error occurs while creating the socket
+     */
+    static native void createMulticastSocketImpl(FileDescriptor aFD,
+            boolean preferIPv4Stack) throws SocketException;
+
+    /*
+     * Recieve at most <code>count</code> bytes into the buffer <code>data</code>
+     * at the <code>offset</code> on the socket.
+     * 
+     * @param aFD the socket FileDescriptor @param data the receive buffer
+     * @param offset the offset into the buffer @param count the max number of
+     * bytes to receive @param timeout the max time the read operation should
+     * block waiting for data @return int the actual number of bytes read
+     * @throws IOException @exception SocketException if an error occurs while
+     * reading
+     */
+    static native int receiveStreamImpl(FileDescriptor aFD, byte[] data,
+            int offset, int count, int timeout) throws IOException;
+
+    /*
+     * Send <code>count</code> bytes from the buffer <code>data</code> at
+     * the <code>offset</code>, on the socket.
+     * 
+     * @param fd
+     * 
+     * @param data the send buffer @param offset the offset into the buffer
+     * @param count the number of bytes to receive @return int the actual number
+     * of bytes sent @throws IOException @exception SocketException if an error
+     * occurs while writing
+     */
+    static native int sendStreamImpl(FileDescriptor fd, byte[] data,
+            int offset, int count) throws IOException;
+
+    private native void shutdownInputImpl(FileDescriptor descriptor)
+            throws IOException;
+
+    private native void shutdownOutputImpl(FileDescriptor descriptor)
+            throws IOException;
+
+    // BEGIN android-removed
+    // static native void acceptStreamSocketImpl(FileDescriptor fdServer,
+    //         SocketImpl newSocket, FileDescriptor fdnewSocket, int timeout)
+    //         throws IOException;
+    // 
+    // static native void createStreamSocketImpl(FileDescriptor aFD,
+    //         boolean preferIPv4Stack) throws SocketException;
+    // END android-removed
+
+    static native int sendDatagramImpl2(FileDescriptor fd, byte[] data,
+            int offset, int length, int port, InetAddress inetAddress)
+            throws IOException;
+
+    static native int selectImpl(FileDescriptor[] readfd,
+            FileDescriptor[] writefd, int cread, int cwirte, int[] flags,
+            long timeout);
+
+    static native InetAddress getSocketLocalAddressImpl(FileDescriptor aFD,
+            boolean preferIPv6Addresses);
+
+    /*
+     * Query the IP stack for the local port to which this socket is bound.
+     * 
+     * @param aFD the socket descriptor @param preferIPv6Addresses address
+     * preference for nodes that support both IPv4 and IPv6 @return int the
+     * local port to which the socket is bound
+     */
+    static native int getSocketLocalPortImpl(FileDescriptor aFD,
+            boolean preferIPv6Addresses);
+
+    /*
+     * Query the IP stack for the nominated socket option.
+     * 
+     * @param aFD the socket descriptor @param opt the socket option type
+     * @return the nominated socket option value
+     * 
+     * @throws SocketException if the option is invalid
+     */
+    static native Object getSocketOptionImpl(FileDescriptor aFD, int opt)
+            throws SocketException;
+
+    /*
+     * Set the nominated socket option in the IP stack.
+     * 
+     * @param aFD the socket descriptor @param opt the option selector @param
+     * optVal the nominated option value
+     * 
+     * @throws SocketException if the option is invalid or cannot be set
+     */
+    static native void setSocketOptionImpl(FileDescriptor aFD, int opt,
+            Object optVal) throws SocketException;
+
+    static native int getSocketFlagsImpl();
+
+    /*
+     * Close the socket in the IP stack.
+     * 
+     * @param aFD the socket descriptor
+     */
+    static native void socketCloseImpl(FileDescriptor aFD);
+
+    static native InetAddress getHostByAddrImpl(byte[] addr)
+            throws UnknownHostException;
+
+    static native InetAddress getHostByNameImpl(String addr,
+            boolean preferIPv6Addresses) throws UnknownHostException;
+
+    native void setInetAddressImpl(InetAddress sender, byte[] address);
+
+    // BEGIN android-removed
+    // native int isReachableByICMPImpl(InetAddress addr, InetAddress local,
+    //         int ttl, int timeout);
+    // END android-removed
+    
+    native Channel inheritedChannelImpl();
+
+    public Channel inheritedChannel() {
+        return inheritedChannelImpl();
+    }
+    
+    public void oneTimeInitialization(boolean jcl_supports_ipv6){
+        if (!isNetworkInited){
+            oneTimeInitializationImpl(jcl_supports_ipv6);
+            isNetworkInited = true;
+        } 
+    }
+    
+    native void oneTimeInitializationImpl (boolean jcl_supports_ipv6);
+}
\ No newline at end of file