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

Example 96 with DatagramPacket

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

the class ActiveDatagramChannel method receiveMessage.

@Override
public Message receiveMessage() throws IOException {
    byte[] buf = new byte[maxPacketSize];
    DatagramPacket packet = new DatagramPacket(buf, maxPacketSize);
    socket.receive(packet);
    ActiveMessage am = null;
    try {
        am = new ActiveMessage(packet.getData());
    } catch (JSONException e) {
        e.printStackTrace();
    }
    return am;
}

Example 97 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 98 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 99 with DatagramPacket

use of java.net.DatagramPacket in project opennms by OpenNMS.

the class NativeSocketTest method testServer.

@Test
public void testServer() throws Exception {
    String[] cmds = new String[] { "echo", "echo2", "quit" };
    DatagramSocket socket = null;
    try {
        socket = new DatagramSocket();
        for (final String cmd : cmds) {
            final DatagramSocket sock = socket;
            final FutureTask<DatagramPacket> task = new FutureTask<DatagramPacket>(new Callable<DatagramPacket>() {

                @Override
                public DatagramPacket call() throws Exception {
                    printf("Sending cmd: %s\n", cmd);
                    final byte[] data = cmd.getBytes(StandardCharsets.UTF_8);
                    final DatagramPacket p = new DatagramPacket(data, data.length, InetAddress.getLocalHost(), sock.getLocalPort());
                    sock.send(p);
                    printf("Receiving...\n");
                    final DatagramPacket r = new DatagramPacket(new byte[128], 128);
                    sock.receive(r);
                    printf("Received\n");
                    return r;
                }
            });
            m_executor.execute(task);
            final DatagramPacket r = task.get(10, TimeUnit.SECONDS);
            assertNotNull(r);
            final String response = new String(r.getData(), r.getOffset(), r.getLength(), StandardCharsets.UTF_8);
            printf("Received Response: %s from %s:%d\n", response, r.getAddress().getHostAddress(), r.getPort());
            assertEquals(cmd, response);
        }
    } finally {
        if (socket != null)
            socket.close();
    }
}

Example 100 with DatagramPacket

use of java.net.DatagramPacket in project opennms by OpenNMS.

the class SnmpPortal method send.

/**
     * Transmits the passed buffer to the respective peer agent. If a failure
     * occurs then an IOException is thrown.
     * 
     * @param peer
     *            The SNMP peer destination
     * @param buf
     *            The buffer to transmit.
     * @param length
     *            The valid length of the buffer
     * 
     * @exception java.lang.IOException
     *                For more details see java.net.DatagramSocket.
     * 
     * @see java.net.DatagramSocket
     * 
     */
void send(SnmpPeer peer, byte[] buf, int length) throws java.io.IOException {
    //
    // create a new datagram packet
    //
    DatagramPacket pkt = new DatagramPacket(buf, length, peer.getPeer(), peer.getPort());
    m_comm.send(pkt);
}