renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/dhcp/DhcpRelayHandler.java

   1 /*
   2  * Copyright (c) 2017 Cisco Systems. All rights reserved.
   3  *
   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
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.dhcp;
  10
  11 import static org.opendaylight.groupbasedpolicy.renderer.vpp.util.VppIidFactory.getVppRendererConfig;
  12
  13 import java.util.Collections;
  14 import java.util.Set;
  15 import java.util.stream.Stream;
  16
  17 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.groupbasedpolicy.renderer.vpp.commands.DhcpRelayCommand;
  20 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.GbpNetconfTransaction;
  21 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.General;
  22 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.MountedDataBrokerProvider;
  23 import org.opendaylight.groupbasedpolicy.renderer.vpp.util.VppIidFactory;
  24 import org.opendaylight.groupbasedpolicy.util.DataStoreHelper;
  25 import org.opendaylight.groupbasedpolicy.util.NetUtils;
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.forwarding.l2_l3.rev170511.has.subnet.Subnet;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.Config;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.TapCase;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.VppEndpoint;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.Ipv4;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.relay.attributes.ServerBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.relay.attributes.ServerKey;
  34 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 import com.google.common.base.Optional;
  39 import com.google.common.collect.SetMultimap;
  40
  41 public class DhcpRelayHandler {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(DhcpRelayHandler.class);
  44     private final DataBroker dataBroker;
  45
  46     // TODO remove argument
  47     public DhcpRelayHandler(DataBroker dataBroker, MountedDataBrokerProvider mountDataProvider) {
  48         this.dataBroker = dataBroker;
  49     }
  50
  51     public void createIpv4DhcpRelay(long vni_vrfid, Subnet subnet, SetMultimap<String, NodeId> vppNodesByL2Fd) {
  52         if (subnet.getDefaultSubnetGatewayIp() == null) {
  53             LOG.trace("Subnet GW IP is null, skipping processing DhcpRelay for vrfid: {}, subnet: {}, VPP nodes: {}",
  54                 vni_vrfid, subnet, vppNodesByL2Fd);
  55             return;
  56         }
  57
  58         for (String bd : vppNodesByL2Fd.keySet()) {
  59             Set<NodeId> vppNodes = vppNodesByL2Fd.get(bd);
  60             for (NodeId vppNode : vppNodes) {
  61                 IpAddress ipAddress = resolveDhcpIpAddress(vppNode, subnet);
  62                 if (ipAddress != null) {
  63                     DhcpRelayCommand dhcpRelayCommand =
  64                         getDhcpRelayBuilder(vni_vrfid, subnet, ipAddress, General.Operations.PUT).build();
  65
  66                     if (!submitDhcpRelay(dhcpRelayCommand, vppNode)) {
  67                         LOG.warn("DHCP Relay was not configured: {}", dhcpRelayCommand);
  68                     }
  69                 } else {
  70                     LOG.warn("DHCP server IP address was not found for node: {}. Skipping processing", vppNode);
  71                 }
  72             }
  73
  74         }
  75     }
  76
  77     private DhcpRelayCommand.DhcpRelayBuilder getDhcpRelayBuilder(long vni_vrfid, Subnet subnet, IpAddress ipAddress,
  78         General.Operations operations) {
  79         return DhcpRelayCommand.builder()
  80             .setRxVrfId(vni_vrfid)
  81             .setOperation(operations)
  82             .setAddressType(Ipv4.class)
  83             .setGatewayIpAddress(subnet.getDefaultSubnetGatewayIp())
  84             .setServerIpAddresses(Collections.singletonList(
  85                 new ServerBuilder()
  86                     .setAddress(ipAddress)
  87                     .setVrfId(vni_vrfid)
  88                     .setKey(new ServerKey(ipAddress, vni_vrfid))
  89                     .build()));
  90     }
  91
  92     private IpAddress resolveDhcpIpAddress(NodeId vppNode, Subnet subnet) {
  93         Optional<Config> vppEndpointOptional =
  94             DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION, getVppRendererConfig(),
  95                 dataBroker.newReadOnlyTransaction());
  96
  97         if (vppEndpointOptional.isPresent() && !vppEndpointOptional.get().getVppEndpoint().isEmpty()) {
  98             Stream<VppEndpoint> vppEndpointStream = vppEndpointOptional.get().getVppEndpoint().stream()
  99                 .filter(vppEndpoint -> vppEndpoint.getInterfaceTypeChoice() instanceof TapCase)
 100                 .filter(vppEndpoint -> vppEndpoint.getVppNodeId().equals(vppNode))
 101                 .filter(vppEndpoint -> ((TapCase) vppEndpoint.getInterfaceTypeChoice()).getDhcpServerAddress() != null)
 102                 .filter(vppEndpoint -> NetUtils.isInRange(subnet.getIpPrefix(), ((TapCase) vppEndpoint
 103                     .getInterfaceTypeChoice()).getDhcpServerAddress().getIpv4Address().getValue()));
 104             java.util.Optional<VppEndpoint> vppEpOptional = vppEndpointStream.findFirst();
 105             if (vppEpOptional.isPresent()) {
 106                 IpAddress dhcpServerAddress =
 107                     ((TapCase) vppEpOptional.get().getInterfaceTypeChoice()).getDhcpServerAddress();
 108                 LOG.trace("Found Dhcp server: {} on VPP node: {}", dhcpServerAddress, vppNode);
 109                 return dhcpServerAddress;
 110             } else {
 111                 LOG.trace("Dhcp server ip not found in subnet: {}, for node: {},in VPP endpoints: {}",
 112                     subnet, vppNode, vppEndpointOptional.get().getVppEndpoint());
 113             }
 114         }
 115         return null;
 116     }
 117
 118     public void deleteIpv4DhcpRelay(long vni_vrfid, Subnet subnet, SetMultimap<String, NodeId> vppNodesByL2Fd) {
 119         if (subnet.getDefaultSubnetGatewayIp() == null) {
 120             LOG.trace("Subnet GW IP is null, skipping processing DhcpRelay for vrfid: {}, subnet: {}, VPP nodes: {}",
 121                 vni_vrfid, subnet, vppNodesByL2Fd);
 122             return;
 123         }
 124
 125         for (String bd : vppNodesByL2Fd.keySet()) {
 126             Set<NodeId> vppNodes = vppNodesByL2Fd.get(bd);
 127             for (NodeId vppNode : vppNodes) {
 128                 IpAddress ipAddress = resolveDhcpIpAddress(vppNode, subnet);
 129                 if (ipAddress != null) {
 130                     DhcpRelayCommand dhcpRelayCommand =
 131                         getDhcpRelayBuilder(vni_vrfid, subnet, ipAddress, General.Operations.DELETE).build();
 132
 133                     if (!submitDhcpRelay(dhcpRelayCommand, vppNode)) {
 134                         LOG.warn("DHCP Relay was not deleted: {}", dhcpRelayCommand);
 135                     }
 136                 } else {
 137                     LOG.trace("DHCP server IP address was not found for node: {}. Skipping processing.", vppNode);
 138                 }
 139
 140             }
 141
 142         }
 143     }
 144
 145     private boolean submitDhcpRelay(DhcpRelayCommand dhcpRelayCommand, NodeId nodeIid) {
 146         LOG.trace("Submitting DhcpRelay command: {}, nodeId: {}", dhcpRelayCommand, nodeIid);
 147         if (dhcpRelayCommand.getOperation() == General.Operations.PUT) {
 148             return GbpNetconfTransaction.netconfSyncedWrite(VppIidFactory.getNetconfNodeIid(nodeIid), dhcpRelayCommand,
 149                 GbpNetconfTransaction.RETRY_COUNT);
 150         } else if (dhcpRelayCommand.getOperation() == General.Operations.DELETE) {
 151             return GbpNetconfTransaction.netconfSyncedDelete(VppIidFactory.getNetconfNodeIid(nodeIid), dhcpRelayCommand,
 152                 GbpNetconfTransaction.RETRY_COUNT);
 153         }
 154         return false;
 155     }
 156 }