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Example 1 with DummyTransport

use of org.snmp4j.transport.DummyTransport in project opennms by OpenNMS.

the class Snmp4JUtils method convertPduToBytes.

/**
	 * @param address
	 * @param port
	 * @param community
	 * @param pdu
	 * 
	 * @return Byte array representing the {@link PDU} in either SNMPv1 or SNMPv2 
	 * format, depending on the type of the {@link PDU} object.
	 */
public static byte[] convertPduToBytes(InetAddress address, int port, String community, PDU pdu) throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicReference<byte[]> bytes = new AtomicReference<>();
    // IP address is optional when using the DummyTransport because
    // all requests are sent to the {@link DummyTransportResponder}
    final DummyTransport<IpAddress> transport = new DummyTransport<IpAddress>(null);
    final AbstractTransportMapping<IpAddress> responder = transport.getResponder(null);
    // Add a DummyTransportResponder listener that will receive the raw bytes of the PDU
    responder.addTransportListener(new TransportListener() {

        @Override
        public void processMessage(TransportMapping transport, Address address, ByteBuffer byteBuffer, TransportStateReference state) {
            byteBuffer.rewind();
            final byte[] byteArray = new byte[byteBuffer.remaining()];
            byteBuffer.get(byteArray);
            bytes.set(byteArray);
            byteBuffer.rewind();
            latch.countDown();
        }
    });
    // Create our own MessageDispatcher since we don't need to do all
    // of the crypto operations necessary to initialize SNMPv3 which is slow
    MessageDispatcher dispatcher = new MessageDispatcherImpl();
    dispatcher.addMessageProcessingModel(new MPv1());
    dispatcher.addMessageProcessingModel(new MPv2c());
    Snmp snmp = new Snmp(dispatcher, responder);
    snmp.listen();
    CommunityTarget target = new CommunityTarget();
    target.setCommunity(new OctetString(community));
    if (pdu instanceof PDUv1) {
        target.setVersion(SnmpConstants.version1);
    } else {
        target.setVersion(SnmpConstants.version2c);
    }
    target.setAddress(Snmp4JAgentConfig.convertAddress(address, port));
    snmp.send(pdu, target, transport);
    latch.await();
    return bytes.get();
}
Also used : OctetString(org.snmp4j.smi.OctetString) Address(org.snmp4j.smi.Address) IpAddress(org.snmp4j.smi.IpAddress) InetAddress(java.net.InetAddress) TransportMapping(org.snmp4j.TransportMapping) AbstractTransportMapping(org.snmp4j.transport.AbstractTransportMapping) MPv2c(org.snmp4j.mp.MPv2c) AtomicReference(java.util.concurrent.atomic.AtomicReference) MessageDispatcherImpl(org.snmp4j.MessageDispatcherImpl) CountDownLatch(java.util.concurrent.CountDownLatch) ByteBuffer(java.nio.ByteBuffer) TransportListener(org.snmp4j.transport.TransportListener) MessageDispatcher(org.snmp4j.MessageDispatcher) TransportStateReference(org.snmp4j.TransportStateReference) Snmp(org.snmp4j.Snmp) IpAddress(org.snmp4j.smi.IpAddress) MPv1(org.snmp4j.mp.MPv1) DummyTransport(org.snmp4j.transport.DummyTransport) PDUv1(org.snmp4j.PDUv1) CommunityTarget(org.snmp4j.CommunityTarget)

Aggregations

InetAddress (java.net.InetAddress)1 ByteBuffer (java.nio.ByteBuffer)1 CountDownLatch (java.util.concurrent.CountDownLatch)1 AtomicReference (java.util.concurrent.atomic.AtomicReference)1 CommunityTarget (org.snmp4j.CommunityTarget)1 MessageDispatcher (org.snmp4j.MessageDispatcher)1 MessageDispatcherImpl (org.snmp4j.MessageDispatcherImpl)1 PDUv1 (org.snmp4j.PDUv1)1 Snmp (org.snmp4j.Snmp)1 TransportMapping (org.snmp4j.TransportMapping)1 TransportStateReference (org.snmp4j.TransportStateReference)1 MPv1 (org.snmp4j.mp.MPv1)1 MPv2c (org.snmp4j.mp.MPv2c)1 Address (org.snmp4j.smi.Address)1 IpAddress (org.snmp4j.smi.IpAddress)1 OctetString (org.snmp4j.smi.OctetString)1 AbstractTransportMapping (org.snmp4j.transport.AbstractTransportMapping)1 DummyTransport (org.snmp4j.transport.DummyTransport)1 TransportListener (org.snmp4j.transport.TransportListener)1