Examples with MPv2c org.snmp4j.mp.MPv2c used on opensource projects

Example 1 with MPv2c

use of org.snmp4j.mp.MPv2c in project opennms by OpenNMS.

the class Snmp4JAgentConfig method createSnmpSession.

public Snmp createSnmpSession() throws IOException {
    final TransportMapping<?> transport = new DefaultUdpTransportMapping();
    final MessageDispatcher disp = new MessageDispatcherImpl();
    final Snmp session;
    // models we need for the specific agent
    if (!isSnmpV3()) {
        disp.addMessageProcessingModel(new MPv1());
        disp.addMessageProcessingModel(new MPv2c());
        session = new Snmp(disp, transport);
    } else {
        // Make a new USM
        final USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(MPv3.createLocalEngineID()), 0);
        // Add the specified user to the USM
        usm.addUser(getSecurityName(), new UsmUser(getSecurityName(), getAuthProtocol(), getAuthPassPhrase(), getPrivProtocol(), getPrivPassPhrase()));
        disp.addMessageProcessingModel(new MPv3(usm));
        session = new Snmp(disp, transport);
    }
    return session;
}

Example 2 with MPv2c

use of org.snmp4j.mp.MPv2c 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());
    final Snmp snmp = new Snmp(dispatcher, responder);
    Snmp4JStrategy.trackSession(snmp);
    try {
        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();
    } finally {
        try {
            snmp.close();
        } catch (final IOException e) {
            LOG.error("failed to close SNMP session", e);
        } finally {
            Snmp4JStrategy.reapSession(snmp);
        }
    }
}

Example 3 with MPv2c

use of org.snmp4j.mp.MPv2c in project opennms by OpenNMS.

the class MockSnmpAgent method initMessageDispatcher.

/**
 * <p>
 * Note that this method can hang if your system entropy is not high enough.
 * Here is a stack trace from a test running on JDK 1.8u40:</p>
 *
 * <pre>
 * Thread [MockSnmpAgent-1657048932] (Suspended)
 * owns: SecureRandom  (id=26)
 * owns: SecureRandom  (id=27)
 * owns: SecurityProtocols  (id=28)
 * FileInputStream.readBytes(byte[], int, int) line: not available [native method]
 * FileInputStream.read(byte[], int, int) line: 255
 * NativeSeedGenerator(SeedGenerator$URLSeedGenerator).getSeedBytes(byte[]) line: 539
 * SeedGenerator.generateSeed(byte[]) line: 144
 * SecureRandom$SeederHolder.<clinit>() line: 203 [local variables unavailable]
 * SecureRandom.engineNextBytes(byte[]) line: 221
 * SecureRandom.nextBytes(byte[]) line: 468
 * Salt.<init>() line: 54
 * Salt.getInstance() line: 79
 * PrivDES.<init>() line: 57
 * SecurityProtocols.addDefaultProtocols() line: 155
 * MockSnmpAgent.initMessageDispatcher() line: 306
 * MockSnmpAgent(BaseAgent).init() line: 145
 * MockSnmpAgent.run() line: 380
 * Thread.run() line: 745
 * </pre>
 */
@Override
protected void initMessageDispatcher() {
    s_log.info("MockSnmpAgent: starting initMessageDispatcher()");
    try {
        dispatcher = new MessageDispatcherImpl();
        usm = new USM(SecurityProtocols.getInstance(), agent.getContextEngineID(), updateEngineBoots());
        mpv3 = new MPv3(usm);
        SecurityProtocols.getInstance().addDefaultProtocols();
        dispatcher.addMessageProcessingModel(new MPv1());
        dispatcher.addMessageProcessingModel(new MPv2c());
        dispatcher.addMessageProcessingModel(mpv3);
        initSnmpSession();
    } finally {
        s_log.info("MockSnmpAgent: finished initMessageDispatcher()");
    }
}

Example 4 with MPv2c

use of org.snmp4j.mp.MPv2c in project LogHub by fbacchella.

the class SnmpTrap method configure.

@Override
public boolean configure(Properties properties) {
    decoder = Receiver.NULLDECODER;
    if (!reconfigured && properties.containsKey("mibdirs")) {
        reconfigured = true;
        String[] mibdirs = null;
        try {
            mibdirs = Arrays.stream((Object[]) properties.get("mibdirs")).map(i -> i.toString()).toArray(String[]::new);
            formatter = OIDFormatter.register(mibdirs);
        } catch (ClassCastException e) {
            logger.error("mibdirs property is not a string array");
            logger.catching(Level.DEBUG, e.getCause());
            return false;
        }
    } else {
        formatter = OIDFormatter.register();
    }
    threadPool = ThreadPool.create("Trap", 2);
    MultiThreadedMessageDispatcher dispatcher = new MultiThreadedMessageDispatcher(threadPool, new MessageDispatcherImpl());
    dispatcher.addCommandResponder(this);
    dispatcher.addMessageProcessingModel(new MPv1());
    dispatcher.addMessageProcessingModel(new MPv2c());
    Address listenAddress = GenericAddress.parse(protocol + ":" + listen + "/" + port);
    TransportMapping<?> transport;
    try {
        transport = new DefaultUdpTransportMapping((UdpAddress) listenAddress);
    } catch (IOException e) {
        logger.error("can't bind to {}: {}", listenAddress, e.getMessage());
        return false;
    }
    snmp = new Snmp(dispatcher, transport);
    try {
        snmp.listen();
    } catch (IOException e) {
        logger.error("can't listen: {}", e.getMessage());
    }
    return super.configure(properties);
}