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