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