2 * Copyright (c) 2018 Alten Calsoft Labs India Pvt Ltd. 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
9 package org.opendaylight.netvirt.vpnmanager.iplearn;
11 import com.google.common.base.Optional;
12 import com.google.common.cache.Cache;
13 import com.google.common.cache.CacheBuilder;
14 import java.math.BigInteger;
15 import java.util.List;
16 import java.util.Objects;
17 import java.util.concurrent.TimeUnit;
18 import org.apache.commons.lang3.tuple.ImmutablePair;
19 import org.apache.commons.lang3.tuple.Pair;
20 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
21 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
22 import org.opendaylight.genius.mdsalutil.NWUtil;
23 import org.opendaylight.netvirt.vpnmanager.VpnUtil;
24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.LearntVpnVipToPortEventAction;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.adjacency.list.Adjacency;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.learnt.vpn.vip.to.port.data.LearntVpnVipToPort;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.neutron.vpn.portip.port.data.VpnPortipToPort;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.vpn.config.rev161130.VpnConfig;
33 import org.slf4j.Logger;
34 import org.slf4j.LoggerFactory;
36 public class AbstractIpLearnNotificationHandler {
38 private static final Logger LOG = LoggerFactory.getLogger(AbstractIpLearnNotificationHandler.class);
40 // temp where Key is VPNInstance+IP and value is timestamp
41 private final Cache<Pair<String, String>, BigInteger> migrateIpCache;
43 protected final DataBroker dataBroker;
44 protected final IdManagerService idManager;
45 protected final IInterfaceManager interfaceManager;
46 protected final VpnConfig config;
47 protected final VpnUtil vpnUtil;
49 public AbstractIpLearnNotificationHandler(DataBroker dataBroker, IdManagerService idManager,
50 IInterfaceManager interfaceManager, VpnConfig vpnConfig, VpnUtil vpnUtil) {
51 this.dataBroker = dataBroker;
52 this.idManager = idManager;
53 this.interfaceManager = interfaceManager;
54 this.config = vpnConfig;
55 this.vpnUtil = vpnUtil;
57 long duration = config.getArpLearnTimeout() * 10;
58 long cacheSize = config.getArpCacheSize().longValue();
60 CacheBuilder.newBuilder().maximumSize(cacheSize).expireAfterWrite(duration,
61 TimeUnit.MILLISECONDS).build();
64 protected void validateAndProcessIpLearning(String srcInterface, IpAddress srcIP, MacAddress srcMac,
65 IpAddress targetIP, BigInteger metadata) {
66 List<Adjacency> adjacencies = vpnUtil.getAdjacenciesForVpnInterfaceFromConfig(srcInterface);
67 if (adjacencies != null) {
68 for (Adjacency adj : adjacencies) {
69 IpPrefix ipPrefix = new IpPrefix(adj.getIpAddress().toCharArray());
70 if (NWUtil.isIpAddressInRange(srcIP, ipPrefix)) {
76 LOG.trace("ARP/NA Notification Response Received from interface {} and IP {} having MAC {}, learning MAC",
77 srcInterface, String.valueOf(srcIP.getValue()), srcMac.getValue());
78 processIpLearning(srcInterface, srcIP, srcMac, metadata, targetIP);
81 protected void processIpLearning(String srcInterface, IpAddress srcIP, MacAddress srcMac, BigInteger metadata,
83 if (metadata != null && !Objects.equals(metadata, BigInteger.ZERO)) {
84 Optional<List<String>> vpnList = vpnUtil.getVpnHandlingIpv4AssociatedWithInterface(srcInterface);
85 if (vpnList.isPresent()) {
86 String srcIpToQuery = String.valueOf(srcIP.getValue());
87 String destIpToQuery = String.valueOf(dstIP.getValue());
88 for (String vpnName : vpnList.get()) {
89 LOG.info("Received ARP/NA for sender MAC {} and sender IP {} via interface {}",
90 srcMac.getValue(), srcIpToQuery, srcInterface);
91 VpnPortipToPort vpnPortipToPort =
92 vpnUtil.getNeutronPortFromVpnPortFixedIp(vpnName, srcIpToQuery);
93 if (vpnPortipToPort != null) {
94 /* This is a well known neutron port and so should be ignored
95 * from being discovered
99 LearntVpnVipToPort learntVpnVipToPort = vpnUtil.getLearntVpnVipToPort(vpnName, srcIpToQuery);
100 if (learntVpnVipToPort != null) {
101 String oldPortName = learntVpnVipToPort.getPortName();
102 String oldMac = learntVpnVipToPort.getMacAddress();
103 if (!oldMac.equalsIgnoreCase(srcMac.getValue())) {
104 //MAC has changed for requested IP
105 LOG.info("ARP/NA Source IP/MAC data modified for IP {} with MAC {} and Port {}",
106 srcIpToQuery, srcMac, srcInterface);
107 synchronized ((vpnName + srcIpToQuery).intern()) {
108 vpnUtil.createLearntVpnVipToPortEvent(vpnName, srcIpToQuery, destIpToQuery,
109 oldPortName, oldMac, LearntVpnVipToPortEventAction.Delete, null);
110 putVpnIpToMigrateIpCache(vpnName, srcIpToQuery, srcMac);
113 } else if (!isIpInMigrateCache(vpnName, srcIpToQuery)) {
114 learnMacFromIncomingPacket(vpnName, srcInterface, srcIP, srcMac, dstIP);
118 LOG.info("IP LEARN NO_RESOLVE: VPN not configured. Ignoring responding to ARP/NA requests from this"
119 + " Interface {}.", srcInterface);
126 private void learnMacFromIncomingPacket(String vpnName, String srcInterface, IpAddress srcIP, MacAddress srcMac,
128 String srcIpToQuery = String.valueOf(srcIP.getValue());
129 String destIpToQuery = String.valueOf(dstIP.getValue());
130 synchronized ((vpnName + srcIpToQuery).intern()) {
131 vpnUtil.createLearntVpnVipToPortEvent(vpnName, srcIpToQuery, destIpToQuery, srcInterface,
132 srcMac.getValue(), LearntVpnVipToPortEventAction.Add, null);
136 private void putVpnIpToMigrateIpCache(String vpnName, String ipToQuery, MacAddress srcMac) {
137 long cacheSize = config.getArpCacheSize().longValue();
138 if (migrateIpCache.size() >= cacheSize) {
139 LOG.debug("IP_MIGRATE_CACHE: max size {} reached, assuming cache eviction we still put IP {}"
140 + " vpnName {} with MAC {}", cacheSize, ipToQuery, vpnName, srcMac);
142 LOG.debug("IP_MIGRATE_CACHE: add to dirty cache IP {} vpnName {} with MAC {}", ipToQuery, vpnName, srcMac);
143 migrateIpCache.put(new ImmutablePair<>(vpnName, ipToQuery),
144 new BigInteger(String.valueOf(System.currentTimeMillis())));
147 private boolean isIpInMigrateCache(String vpnName, String ipToQuery) {
148 if (migrateIpCache == null || migrateIpCache.size() == 0) {
151 Pair<String, String> keyPair = new ImmutablePair<>(vpnName, ipToQuery);
152 BigInteger prevTimeStampCached = migrateIpCache.getIfPresent(keyPair);
153 if (prevTimeStampCached == null) {
154 LOG.debug("IP_MIGRATE_CACHE: there is no IP {} vpnName {} in dirty cache, so learn it",
158 if (System.currentTimeMillis() > prevTimeStampCached.longValue() + config.getArpLearnTimeout()) {
159 LOG.debug("IP_MIGRATE_CACHE: older than timeout value - remove from dirty cache IP {} vpnName {}",
161 migrateIpCache.invalidate(keyPair);
164 LOG.debug("IP_MIGRATE_CACHE: younger than timeout value - ignore learning IP {} vpnName {}",