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.genius.mdsalutil.NWUtil;
21 import org.opendaylight.netvirt.neutronvpn.api.enums.IpVersionChoice;
22 import org.opendaylight.netvirt.neutronvpn.interfaces.INeutronVpnManager;
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.inet.types.rev130715.IpPrefixBuilder;
27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress;
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.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.Port;
34 import org.slf4j.Logger;
35 import org.slf4j.LoggerFactory;
37 public abstract class AbstractIpLearnNotificationHandler {
39 private static final Logger LOG = LoggerFactory.getLogger(AbstractIpLearnNotificationHandler.class);
41 // temp where Key is VPNInstance+IP and value is timestamp
42 private final Cache<Pair<String, String>, BigInteger> migrateIpCache;
44 protected final VpnConfig config;
45 protected final VpnUtil vpnUtil;
46 protected final INeutronVpnManager neutronVpnManager;
48 public AbstractIpLearnNotificationHandler(VpnConfig vpnConfig, VpnUtil vpnUtil,
49 INeutronVpnManager neutronVpnManager) {
50 this.config = vpnConfig;
51 this.vpnUtil = vpnUtil;
52 this.neutronVpnManager = neutronVpnManager;
54 long duration = config.getIpLearnTimeout() * 10;
55 long cacheSize = config.getMigrateIpCacheSize().longValue();
57 CacheBuilder.newBuilder().maximumSize(cacheSize).expireAfterWrite(duration,
58 TimeUnit.MILLISECONDS).build();
61 protected void validateAndProcessIpLearning(String srcInterface, IpAddress srcIP, MacAddress srcMac,
62 IpAddress targetIP, BigInteger metadata) {
63 List<Adjacency> adjacencies = vpnUtil.getAdjacenciesForVpnInterfaceFromConfig(srcInterface);
64 IpVersionChoice srcIpVersion = vpnUtil.getIpVersionFromString(srcIP.stringValue());
65 boolean isSrcIpVersionPartOfVpn = false;
66 if (adjacencies != null && !adjacencies.isEmpty()) {
67 for (Adjacency adj : adjacencies) {
68 IpPrefix ipPrefix = IpPrefixBuilder.getDefaultInstance(adj.getIpAddress());
69 // If extra/static route is configured, we should ignore for learning process
70 if (NWUtil.isIpAddressInRange(srcIP, ipPrefix)) {
73 IpVersionChoice currentAdjIpVersion = vpnUtil.getIpVersionFromString(adj.getIpAddress());
74 if (srcIpVersion.isIpVersionChosen(currentAdjIpVersion)) {
75 isSrcIpVersionPartOfVpn = true;
78 //If srcIP version is not part of the srcInterface VPN Adjacency, ignore IpLearning process
79 if (!isSrcIpVersionPartOfVpn) {
84 LOG.trace("ARP/NA Notification Response Received from interface {} and IP {} having MAC {}, learning MAC",
85 srcInterface, srcIP.stringValue(), srcMac.getValue());
86 processIpLearning(srcInterface, srcIP, srcMac, metadata, targetIP);
89 protected void processIpLearning(String srcInterface, IpAddress srcIP, MacAddress srcMac, BigInteger metadata,
92 if (metadata == null || Objects.equals(metadata, BigInteger.ZERO)) {
96 Optional<List<String>> vpnList = vpnUtil.getVpnHandlingIpv4AssociatedWithInterface(srcInterface);
97 if (!vpnList.isPresent()) {
98 LOG.info("IP LEARN NO_RESOLVE: VPN not configured. Ignoring responding to ARP/NA requests from this"
99 + " Interface {}.", srcInterface);
103 String srcIpToQuery = srcIP.stringValue();
104 String destIpToQuery = dstIP.stringValue();
105 for (String vpnName : vpnList.get()) {
106 LOG.info("Received ARP/NA for sender MAC {} and sender IP {} via interface {}",
107 srcMac.getValue(), srcIpToQuery, srcInterface);
108 VpnPortipToPort vpnPortipToPort =
109 vpnUtil.getNeutronPortFromVpnPortFixedIp(vpnName, srcIpToQuery);
110 if (vpnPortipToPort != null) {
111 /* This is a well known neutron port and so should be ignored
112 * from being discovered...unless it is an Octavia VIP
114 String portName = vpnPortipToPort.getPortName();
115 Port neutronPort = neutronVpnManager.getNeutronPort(portName);
117 if (neutronPort == null) {
118 LOG.warn("{} should have been a neutron port but could not retrieve it. Aborting processing",
123 if (!"Octavia".equals(neutronPort.getDeviceOwner())) {
124 LOG.debug("Neutron port {} is not an Octavia port, ignoring", portName);
129 LearntVpnVipToPort learntVpnVipToPort = vpnUtil.getLearntVpnVipToPort(vpnName, srcIpToQuery);
130 if (learntVpnVipToPort != null) {
131 String oldPortName = learntVpnVipToPort.getPortName();
132 String oldMac = learntVpnVipToPort.getMacAddress();
133 if (!oldMac.equalsIgnoreCase(srcMac.getValue())) {
134 //MAC has changed for requested IP
135 LOG.info("ARP/NA Source IP/MAC data modified for IP {} with MAC {} and Port {}",
136 srcIpToQuery, srcMac, srcInterface);
137 synchronized ((vpnName + srcIpToQuery).intern()) {
138 vpnUtil.createLearntVpnVipToPortEvent(vpnName, srcIpToQuery, destIpToQuery,
139 oldPortName, oldMac, LearntVpnVipToPortEventAction.Delete, null);
140 putVpnIpToMigrateIpCache(vpnName, srcIpToQuery, srcMac);
143 } else if (!isIpInMigrateCache(vpnName, srcIpToQuery)) {
144 learnMacFromIncomingPacket(vpnName, srcInterface, srcIP, srcMac, dstIP);
149 private void learnMacFromIncomingPacket(String vpnName, String srcInterface, IpAddress srcIP, MacAddress srcMac,
151 String srcIpToQuery = srcIP.stringValue();
152 String destIpToQuery = dstIP.stringValue();
153 synchronized ((vpnName + srcIpToQuery).intern()) {
154 vpnUtil.createLearntVpnVipToPortEvent(vpnName, srcIpToQuery, destIpToQuery, srcInterface,
155 srcMac.getValue(), LearntVpnVipToPortEventAction.Add, null);
159 private void putVpnIpToMigrateIpCache(String vpnName, String ipToQuery, MacAddress srcMac) {
160 long cacheSize = config.getMigrateIpCacheSize().longValue();
161 if (migrateIpCache.size() >= cacheSize) {
162 LOG.debug("IP_MIGRATE_CACHE: max size {} reached, assuming cache eviction we still put IP {}"
163 + " vpnName {} with MAC {}", cacheSize, ipToQuery, vpnName, srcMac);
165 LOG.debug("IP_MIGRATE_CACHE: add to dirty cache IP {} vpnName {} with MAC {}", ipToQuery, vpnName, srcMac);
166 migrateIpCache.put(new ImmutablePair<>(vpnName, ipToQuery),
167 new BigInteger(String.valueOf(System.currentTimeMillis())));
170 private boolean isIpInMigrateCache(String vpnName, String ipToQuery) {
171 if (migrateIpCache == null || migrateIpCache.size() == 0) {
174 Pair<String, String> keyPair = new ImmutablePair<>(vpnName, ipToQuery);
175 BigInteger prevTimeStampCached = migrateIpCache.getIfPresent(keyPair);
176 if (prevTimeStampCached == null) {
177 LOG.debug("IP_MIGRATE_CACHE: there is no IP {} vpnName {} in dirty cache, so learn it",
181 if (System.currentTimeMillis() > prevTimeStampCached.longValue() + config.getIpLearnTimeout()) {
182 LOG.debug("IP_MIGRATE_CACHE: older than timeout value - remove from dirty cache IP {} vpnName {}",
184 migrateIpCache.invalidate(keyPair);
187 LOG.debug("IP_MIGRATE_CACHE: younger than timeout value - ignore learning IP {} vpnName {}",