Examples with DatagramPacket java.net.DatagramPacket used on opensource projects

Example 86 with DatagramPacket

use of java.net.DatagramPacket in project Dragonet-Legacy by DragonetMC.

the class UDPServerSocket method readPacket.

public DatagramPacket readPacket() throws IOException {
    ByteBuffer buffer = ByteBuffer.allocate(65536);
    InetSocketAddress socketAddress = (InetSocketAddress) this.channel.receive(buffer);
    if (socketAddress == null) {
        return null;
    }
    DatagramPacket packet = new DatagramPacket(new byte[buffer.position()], buffer.position());
    packet.setAddress(socketAddress.getAddress());
    packet.setPort(socketAddress.getPort());
    packet.setLength(buffer.position());
    packet.setData(Arrays.copyOf(buffer.array(), packet.getLength()));
    //MainLogger.getLogger().debug(TextFormat.YELLOW + "In: " + Binary.bytesToHexString(packet.getData(), true));
    return packet;
/*DatagramPacket packet = new DatagramPacket(new byte[65536], 65536);

        this.socket.receive(packet);
        packet.setData(Arrays.copyOf(packet.getData(), packet.getLength()));
        return packet;*/
}

Example 87 with DatagramPacket

use of java.net.DatagramPacket in project graylog2-server by Graylog2.

the class UdpTransportTest method sendUdpDatagram.

private void sendUdpDatagram(String hostname, int port, int size) throws IOException {
    final InetAddress address = InetAddress.getByName(hostname);
    final byte[] data = new byte[size];
    final DatagramPacket packet = new DatagramPacket(data, data.length, address, port);
    DatagramSocket toSocket = null;
    try {
        toSocket = new DatagramSocket();
        toSocket.send(packet);
    } finally {
        if (toSocket != null) {
            toSocket.close();
        }
    }
}

Example 88 with DatagramPacket

use of java.net.DatagramPacket in project GNS by MobilityFirst.

the class LookupWorker method sendResponse.

/**
   * Returns a response to the sender.
   *
   * @param responseBytes
   */
private void sendResponse(byte[] responseBytes) {
    DatagramPacket outgoingPacket = new DatagramPacket(responseBytes, responseBytes.length, incomingPacket.getAddress(), incomingPacket.getPort());
    try {
        socket.send(outgoingPacket);
        NameResolution.getLogger().log(Level.FINE, "Response sent to {0} {1}", new Object[] { incomingPacket.getAddress().toString(), incomingPacket.getPort() });
    } catch (IOException e) {
        NameResolution.getLogger().log(Level.SEVERE, "Failed to send response{0}", e);
    }
}

Example 89 with DatagramPacket

use of java.net.DatagramPacket in project GNS by MobilityFirst.

the class UdpDnsServer method run.

@Override
public void run() {
    NameResolution.getLogger().log(Level.INFO, "Starting local DNS Server on port {0}{1}fallback DNS server at {2}", new Object[] { sock.getLocalPort(), gnsServerIP != null ? (" with GNS server at " + gnsServerIP + " and ") : " with ", dnsServerIP });
    while (true) {
        try {
            final short udpLength = 512;
            while (true) {
                byte[] incomingData = new byte[udpLength];
                DatagramPacket incomingPacket = new DatagramPacket(incomingData, incomingData.length);
                // Read the incoming request
                incomingPacket.setLength(incomingData.length);
                try {
                    sock.receive(incomingPacket);
                } catch (InterruptedIOException e) {
                    continue;
                }
                executor.execute(new LookupWorker(sock, incomingPacket, incomingData, gnsServer, dnsServer, dnsCache, handler));
            }
        } catch (IOException e) {
            NameResolution.getLogger().log(Level.SEVERE, "Error in UDP Server (will sleep for 3 seconds and try again): {0}", e);
            ThreadUtils.sleep(3000);
        }
    }
}

Example 90 with DatagramPacket

use of java.net.DatagramPacket in project android_frameworks_base by DirtyUnicorns.

the class BandwidthEnforcementTestService method testDns.

/**
     * Tests dns query.
     * @return true if it was able to connect, false otherwise.
     */
public static boolean testDns() {
    try {
        final DatagramSocket socket = new DatagramSocket();
        try {
            socket.setSoTimeout(10000);
            final byte[] query = buildDnsQuery("www", "android", "com");
            final DatagramPacket queryPacket = new DatagramPacket(query, query.length, InetAddress.parseNumericAddress("8.8.8.8"), 53);
            socket.send(queryPacket);
            final byte[] reply = new byte[query.length];
            final DatagramPacket replyPacket = new DatagramPacket(reply, reply.length);
            socket.receive(replyPacket);
            return true;
        } finally {
            socket.close();
        }
    } catch (IOException e) {
        Log.d(TAG, "error: " + e);
    }
    return false;
}