2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.openflowplugin.applications.topology.lldp.utils;
10 import java.nio.charset.Charset;
11 import org.opendaylight.controller.liblldp.Ethernet;
12 import org.opendaylight.controller.liblldp.LLDP;
13 import org.opendaylight.controller.liblldp.LLDPTLV;
14 import org.opendaylight.controller.liblldp.NetUtils;
15 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
16 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorRef;
17 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnectorKey;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
24 import org.slf4j.Logger;
25 import org.slf4j.LoggerFactory;
27 public class LLDPDiscoveryUtils {
28 private static final Logger LOG = LoggerFactory.getLogger(LLDPDiscoveryUtils.class);
30 public static final Long LLDP_INTERVAL = (long) (1000*5); // Send LLDP every five seconds
31 public static final Long LLDP_EXPIRATION_TIME = LLDP_INTERVAL*3; // Let up to three intervals pass before we decide we are expired.
33 public static String macToString(byte[] mac) {
34 StringBuilder b = new StringBuilder();
35 for (int i = 0; i < mac.length; i++) {
36 b.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? ":" : ""));
42 public static NodeConnectorRef lldpToNodeConnectorRef(byte[] payload) {
43 Ethernet ethPkt = new Ethernet();
45 ethPkt.deserialize(payload, 0,payload.length * NetUtils.NumBitsInAByte);
46 } catch (Exception e) {
47 LOG.warn("Failed to decode LLDP packet {}", e);
50 if (ethPkt.getPayload() instanceof LLDP) {
51 LLDP lldp = (LLDP) ethPkt.getPayload();
54 NodeId srcNodeId = null;
55 NodeConnectorId srcNodeConnectorId = null;
56 for (LLDPTLV lldptlv : lldp.getOptionalTLVList()) {
57 if (lldptlv.getType() == LLDPTLV.TLVType.Custom.getValue()) {
58 srcNodeConnectorId = new NodeConnectorId(LLDPTLV.getCustomString(lldptlv.getValue(), lldptlv.getLength()));
60 if (lldptlv.getType() == LLDPTLV.TLVType.SystemName.getValue()) {
61 String srcNodeIdString = new String(lldptlv.getValue(),Charset.defaultCharset());
62 srcNodeId = new NodeId(srcNodeIdString);
65 if(srcNodeId != null && srcNodeConnectorId != null) {
66 InstanceIdentifier<NodeConnector> srcInstanceId = InstanceIdentifier.builder(Nodes.class)
67 .child(Node.class,new NodeKey(srcNodeId))
68 .child(NodeConnector.class, new NodeConnectorKey(srcNodeConnectorId))
70 return new NodeConnectorRef(srcInstanceId);
72 } catch (Exception e) {
73 LOG.warn("Caught exception ", e);