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.md.controller.topology.lldp.utils;
10 import java.nio.charset.Charset;
12 import org.opendaylight.controller.sal.packet.Ethernet;
13 import org.opendaylight.controller.sal.packet.LLDP;
14 import org.opendaylight.controller.sal.packet.LLDPTLV;
15 import org.opendaylight.controller.sal.utils.NetUtils;
16 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
17 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorRef;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnector;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.node.NodeConnectorKey;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
28 public class LLDPDiscoveryUtils {
29 static Logger LOG = LoggerFactory.getLogger(LLDPDiscoveryUtils.class);
31 public static final Long LLDP_INTERVAL = (long) (1000*5); // Send LLDP every five seconds
32 public static final Long LLDP_EXPIRATION_TIME = LLDP_INTERVAL*3; // Let up to three intervals pass before we decide we are expired.
34 public static String macToString(byte[] mac) {
35 StringBuilder b = new StringBuilder();
36 for (int i = 0; i < mac.length; i++) {
37 b.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? ":" : ""));
43 public static NodeConnectorRef lldpToNodeConnectorRef(byte[] payload) {
44 Ethernet ethPkt = new Ethernet();
46 ethPkt.deserialize(payload, 0,payload.length * NetUtils.NumBitsInAByte);
47 } catch (Exception e) {
48 LOG.warn("Failed to decode LLDP packet {}", e);
51 if (ethPkt.getPayload() instanceof LLDP) {
52 LLDP lldp = (LLDP) ethPkt.getPayload();
55 NodeId srcNodeId = null;
56 NodeConnectorId srcNodeConnectorId = null;
57 for (LLDPTLV lldptlv : lldp.getOptionalTLVList()) {
58 if (lldptlv.getType() == LLDPTLV.TLVType.Custom.getValue()) {
59 srcNodeConnectorId = new NodeConnectorId(LLDPTLV.getCustomString(lldptlv.getValue(), lldptlv.getLength()));
61 if (lldptlv.getType() == LLDPTLV.TLVType.SystemName.getValue()) {
62 String srcNodeIdString = new String(lldptlv.getValue(),Charset.defaultCharset());
63 srcNodeId = new NodeId(srcNodeIdString);
66 if(srcNodeId != null && srcNodeConnectorId != null) {
67 InstanceIdentifier<NodeConnector> srcInstanceId = InstanceIdentifier.builder(Nodes.class)
68 .child(Node.class,new NodeKey(srcNodeId))
69 .child(NodeConnector.class, new NodeConnectorKey(srcNodeConnectorId))
71 return new NodeConnectorRef(srcInstanceId);
73 } catch (Exception e) {
74 LOG.warn("Caught exception ", e);