Example usage for java.nio ByteBuffer array

List of usage examples for java.nio ByteBuffer array

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Introduction

In this page you can find the example usage for java.nio ByteBuffer array.

Prototype

public final byte[] array()

Source Link

Document

Returns the byte array which this buffer is based on, if there is one.

Usage

From source file:com.example.android.toyvpn.ToyVpnService.java

@Override
public synchronized void run() {
    try {//from  w  ww.  j  av a2 s.  c  o m
        //a. Configure the TUN and get the interface.
        Log.i("VPNService IP", getLocalIpAddress());

        mInterface = builder.setSession("MyVPNService")
                //.setMtu(1500)
                .addAddress("10.0.2.0", 32).addRoute("0.0.0.0", 0).establish();
        //.addDnsServer("8.8.8.8").establish();
        //b. Packets to be sent are queued in this input stream.
        FileInputStream in = new FileInputStream(mInterface.getFileDescriptor());
        //b. Packets received need to be written to this output stream.
        FileOutputStream out = new FileOutputStream(mInterface.getFileDescriptor());
        //c. The UDP channel can be used to pass/get ip package to/from server
        //DatagramChannel tunnel = DatagramChannel.open();
        // Connect to the server, localhost is used for demonstration only.
        //tunnel.connect(new InetSocketAddress("127.0.0.1",mServerPort));
        //d. Protect this socket, so package send by it will not be feedback to the vpn service.
        //protect(tunnel.socket());

        ByteBuffer packet = ByteBuffer.allocate(32767);
        int timer = 0;
        int length = 0;
        boolean idle;

        //e. Use a loop to pass packets.
        while (true) {

            //idle = true;

            // Read the outgoing packet from the input stream.
            length = in.read(packet.array());
            if (length > 0) {
                //Log.i("VpnService", "Out Pck size " + length);
                Packet pktInfo = new Packet(packet);
                //Log.i("VpnService",  pktInfo.ip4Header.destinationAddress + "");

                if (pktInfo.isTCP()) {
                    //TCPProxy
                    //Log.i("VpnService", "TCP: " + pktInfo.tcpHeader.destinationPort + "");
                } else if (pktInfo.isUDP()) {
                    //UDPProxy
                    Log.i("VpnService", "UDP Destport:" + pktInfo.udpHeader.destinationPort + "");
                    UDPtoProxy(packet);
                }
                //TODO Send the outgoing packet to the ProxyServer.
                packet.clear();

                //idle = false;
            }
            Thread.sleep(100);
            // Thread.sleep(100);
            // If we are idle or waiting for the network, sleep for a
            // fraction of time to avoid busy looping.
            // if (idle) {
            //      Thread.sleep(100);
            //     }   
        }
    } catch (Exception e) {
        // Catch any exception
        e.printStackTrace();
    } finally {
        try {
            if (mInterface != null) {
                mInterface.close();
                mInterface = null;
            }
        } catch (Exception e) {

        }
    }
}

From source file:io.Text.java

/** Set to contain the contents of a string. 
 *///from w ww  .  j  a va 2  s  .  c o  m
public void set(String string) {
    try {
        ByteBuffer bb = encode(string, true);
        bytes = bb.array();
        length = bb.limit();
    } catch (CharacterCodingException e) {
        throw new RuntimeException("Should not have happened " + e.toString());
    }
}

From source file:bamboo.openhash.fileshare.FileShare.java

/**
 * Transfer wblocks from the wblocks array to the ready queue.
 */// w  w w  . j  av  a 2  s  .c om
public void make_parents(boolean done) {

    for (int l = 0; l < wblocks.size(); ++l) {
        logger.debug("level " + l + " of " + wblocks.size() + " size=" + wblocks.elementAt(l).size() + " done="
                + done);
        while ((wblocks.elementAt(l).size() >= BRANCHING) || (done && (wblocks.elementAt(l).size() > 1))) {
            int count = min(BRANCHING, wblocks.elementAt(l).size());
            logger.debug("count=" + count);
            for (int i = 0; i < count; ++i) {
                ByteBuffer bb = wblocks.elementAt(l).removeFirst();
                bb.flip();
                md.update(secret);
                md.update(bb.array(), 0, bb.limit());
                byte[] dig = md.digest();
                ready.addLast(new Pair<byte[], ByteBuffer>(dig, bb));
                if (l + 1 >= wblocks.size()) {
                    wblocks.setSize(max(wblocks.size(), l + 2));
                    wblocks.setElementAt(new LinkedList<ByteBuffer>(), l + 1);
                }
                LinkedList<ByteBuffer> next_level = wblocks.elementAt(l + 1);
                if (next_level.isEmpty() || (next_level.getLast().position() == 1024)) {
                    logger.debug("adding a new block to level " + (l + 1));
                    next_level.addLast(ByteBuffer.wrap(new byte[1024]));
                    next_level.getLast().putInt(l + 1);
                }
                logger.debug("adding a digest to level " + (l + 1));
                next_level.getLast().put(dig);
            }

            if (done)
                break;
        }
    }
    logger.debug("make_parents done");
}

From source file:io.lightlink.output.JSONResponseStream.java

public void writeUnquoted(Object value) {
    ByteBuffer byteBuffer = CHARSET.encode(value.toString());
    write(byteBuffer.array(), byteBuffer.remaining());
}

From source file:org.ofbiz.common.CommonServices.java

public static Map<String, Object> byteBufferTest(DispatchContext dctx, Map<String, ?> context) {
    ByteBuffer buffer1 = (ByteBuffer) context.get("byteBuffer1");
    ByteBuffer buffer2 = (ByteBuffer) context.get("byteBuffer2");
    String fileName1 = (String) context.get("saveAsFileName1");
    String fileName2 = (String) context.get("saveAsFileName2");
    String ofbizHome = System.getProperty("ofbiz.home");
    String outputPath1 = ofbizHome + (fileName1.startsWith("/") ? fileName1 : "/" + fileName1);
    String outputPath2 = ofbizHome + (fileName2.startsWith("/") ? fileName2 : "/" + fileName2);

    try {//from w  w w.  j a v a2s .  c  o  m
        RandomAccessFile file1 = new RandomAccessFile(outputPath1, "rw");
        RandomAccessFile file2 = new RandomAccessFile(outputPath2, "rw");
        file1.write(buffer1.array());
        file2.write(buffer2.array());
    } catch (FileNotFoundException e) {
        Debug.logError(e, module);
    } catch (IOException e) {
        Debug.logError(e, module);
    }

    return ServiceUtil.returnSuccess();
}

From source file:org.apache.arrow.vector.util.Text.java

/**
 * Set to contain the contents of a string.
 *//*w  ww.  j a  v a2s  .  co m*/
public void set(String string) {
    try {
        ByteBuffer bb = encode(string, true);
        bytes = bb.array();
        length = bb.limit();
    } catch (CharacterCodingException e) {
        throw new RuntimeException("Should not have happened ", e);
    }
}

From source file:com.mastercard.walletservices.mdes.DeviceInfo.java

/**
 * Return ByteArray of device finger print.
 *
 * @return The Device Finger Pring as String
 *//*  w  ww.  j  a  v a2s.  c o m*/
public String getDeviceFingerprint() {

    byte[] dataBytes = (this.deviceName + this.deviceType + this.imei + this.msisdn + this.nfcCapable
            + this.osName).getBytes();

    ByteBuffer byteBuffer = ByteBuffer.wrap(new byte[dataBytes.length]);
    byteBuffer.put(dataBytes);

    // Create MessageDigest using SHA-256 algorithm Added required
    MessageDigest messageDigest;

    try {
        messageDigest = MessageDigest.getInstance("SHA-256");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
        return null;
    }

    // Hash the result
    byte[] hash = messageDigest.digest(byteBuffer.array());

    // Return Hex
    return new String(Hex.encodeHex(hash));
}

From source file:net.dv8tion.jda.audio.AudioWebSocket.java

private void setupUdpKeepAliveThread() {
    udpKeepAliveThread = new Thread("AudioWebSocket UDP-KeepAlive Guild: " + guild.getId()) {
        @Override/*from www.j  a v  a  2 s . c  o m*/
        public void run() {
            while (socket.isOpen() && !udpSocket.isClosed() && !this.isInterrupted()) {
                long seq = 0;
                try {
                    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES + 1);
                    buffer.put((byte) 0xC9);
                    buffer.putLong(seq);
                    DatagramPacket keepAlivePacket = new DatagramPacket(buffer.array(), buffer.array().length,
                            address);
                    udpSocket.send(keepAlivePacket);

                    Thread.sleep(5000); //Wait 5 seconds to send next keepAlivePacket.
                } catch (NoRouteToHostException e) {
                    LOG.warn("Closing AudioConnection due to inability to ping audio packets.");
                    LOG.warn("Cannot send audio packet because JDA navigate the route to Discord.\n"
                            + "Are you sure you have internet connection? It is likely that you've lost connection.");
                    AudioWebSocket.this.close(true, -1);
                    break;
                } catch (IOException e) {
                    LOG.log(e);
                } catch (InterruptedException e) {
                    //We were asked to close.
                    //                        e.printStackTrace();
                }
            }
        }
    };
    udpKeepAliveThread.setPriority(Thread.NORM_PRIORITY + 1);
    udpKeepAliveThread.setDaemon(true);
    udpKeepAliveThread.start();
}

From source file:edu.mbl.jif.imaging.mmtiff.MultipageTiffReader.java

private String getString(ByteBuffer buffer) {
    try {//from  w ww  . jav a2 s. c  o m
        return new String(buffer.array(), "US-ASCII");
    } catch (UnsupportedEncodingException ex) {
        ReportingUtils.logError(ex);
        return "";
    }
}

From source file:io.lightlink.output.JSONResponseStream.java

public void writeInputStream(InputStream inputStream) {
    write('"');/*w  w w . j a v  a 2s .co m*/

    byte[] buffer = new byte[3 * 1024];
    int length;
    try {
        while ((length = inputStream.read(buffer)) != -1) {
            String encodedBlock;
            if (length < buffer.length) {
                byte part[] = new byte[length];
                System.arraycopy(buffer, 0, part, 0, length);
                encodedBlock = DatatypeConverter.printBase64Binary(part);
            } else {
                encodedBlock = DatatypeConverter.printBase64Binary(buffer);
            }
            ByteBuffer bbuffer = CHARSET.encode(encodedBlock);
            write(bbuffer.array(), bbuffer.remaining());

        }
        write('"');

        inputStream.close();
    } catch (IOException e) {
        throw new RuntimeException(e.toString(), e);
    }
}