/* * Copyright (c) 2016 Cisco and/or its affiliates. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package io.fd.honeycomb.translate.v3po.interfaces; import static com.google.common.base.Preconditions.checkArgument; import com.google.common.net.InetAddresses; import io.fd.honeycomb.translate.v3po.DisabledInterfacesManager; import io.fd.honeycomb.translate.v3po.util.AbstractInterfaceTypeCustomizer; import io.fd.honeycomb.translate.v3po.util.NamingContext; import io.fd.honeycomb.translate.v3po.util.TranslateUtils; import io.fd.honeycomb.translate.v3po.util.WriteTimeoutException; import io.fd.honeycomb.translate.write.WriteContext; import io.fd.honeycomb.translate.write.WriteFailedException; import java.net.InetAddress; import java.util.concurrent.CompletionStage; import javax.annotation.Nonnull; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfaceType; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VxlanTunnel; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Vxlan; import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; import org.openvpp.jvpp.VppBaseCallException; import org.openvpp.jvpp.core.dto.VxlanAddDelTunnel; import org.openvpp.jvpp.core.dto.VxlanAddDelTunnelReply; import org.openvpp.jvpp.core.future.FutureJVppCore; import org.slf4j.Logger; import org.slf4j.LoggerFactory; // TODO extract common code from all Interface type specific writer customizers into a superclass public class VxlanCustomizer extends AbstractInterfaceTypeCustomizer { private static final Logger LOG = LoggerFactory.getLogger(VxlanCustomizer.class); private final NamingContext interfaceNamingContext; private final DisabledInterfacesManager interfaceDisableContext; public VxlanCustomizer(@Nonnull final FutureJVppCore vppApi, @Nonnull final NamingContext interfaceNamingContext, @Nonnull final DisabledInterfacesManager interfaceDisableContext) { super(vppApi); this.interfaceNamingContext = interfaceNamingContext; this.interfaceDisableContext = interfaceDisableContext; } @Override protected Class getExpectedInterfaceType() { return VxlanTunnel.class; } @Override protected final void writeInterface(@Nonnull final InstanceIdentifier id, @Nonnull final Vxlan dataAfter, @Nonnull final WriteContext writeContext) throws WriteFailedException { final String swIfName = id.firstKeyOf(Interface.class).getName(); try { createVxlanTunnel(id, swIfName, dataAfter, writeContext); } catch (VppBaseCallException | IllegalInterfaceTypeException e) { LOG.debug("Failed to set vxlan tunnel for interface: {}, vxlan: {}", swIfName, dataAfter); throw new WriteFailedException.CreateFailedException(id, dataAfter, e); } } @Override public void updateCurrentAttributes(@Nonnull final InstanceIdentifier id, @Nonnull final Vxlan dataBefore, @Nonnull final Vxlan dataAfter, @Nonnull final WriteContext writeContext) throws WriteFailedException.UpdateFailedException { throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, new UnsupportedOperationException("Vxlan tunnel update is not supported")); } @Override public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier id, @Nonnull final Vxlan dataBefore, @Nonnull final WriteContext writeContext) throws WriteFailedException { final String swIfName = id.firstKeyOf(Interface.class).getName(); try { deleteVxlanTunnel(id, swIfName, dataBefore, writeContext); } catch (VppBaseCallException e) { LOG.debug("Failed to delete vxlan tunnel for interface: {}, vxlan: {}", swIfName, dataBefore); throw new WriteFailedException.DeleteFailedException(id, e); } } private void createVxlanTunnel(final InstanceIdentifier id, final String swIfName, final Vxlan vxlan, final WriteContext writeContext) throws VppBaseCallException, WriteTimeoutException { final byte isIpv6 = (byte) (isIpv6(vxlan) ? 1 : 0); final InetAddress srcAddress = InetAddresses.forString(getAddressString(vxlan.getSrc())); final InetAddress dstAddress = InetAddresses.forString(getAddressString(vxlan.getDst())); int encapVrfId = vxlan.getEncapVrfId().intValue(); int vni = vxlan.getVni().getValue().intValue(); LOG.debug("Setting vxlan tunnel for interface: {}. Vxlan: {}", swIfName, vxlan); final CompletionStage vxlanAddDelTunnelReplyCompletionStage = getFutureJVpp().vxlanAddDelTunnel(getVxlanTunnelRequest((byte) 1 /* is add */, srcAddress.getAddress(), dstAddress.getAddress(), encapVrfId, -1, vni, isIpv6)); final VxlanAddDelTunnelReply reply = TranslateUtils.getReplyForWrite(vxlanAddDelTunnelReplyCompletionStage.toCompletableFuture(), id); LOG.debug("Vxlan tunnel set successfully for: {}, vxlan: {}", swIfName, vxlan); if (interfaceNamingContext.containsName(reply.swIfIndex, writeContext.getMappingContext())) { // VPP keeps vxlan tunnels present even after they are delete(reserving ID for next tunnel) // This may cause inconsistencies in mapping context when configuring tunnels like this: // 1. Add tunnel 2. Delete tunnel 3. Read interfaces (reserved mapping e.g. vxlan_tunnel0 -> 6 // will get into mapping context) 4. Add tunnel (this will add another mapping with the same // reserved ID and context is invalid) // That's why a check has to be performed here removing mapping vxlan_tunnel0 -> 6 mapping and storing // new name for that ID final String formerName = interfaceNamingContext.getName(reply.swIfIndex, writeContext.getMappingContext()); LOG.debug("Removing updated mapping of a vxlan tunnel, id: {}, former name: {}, new name: {}", reply.swIfIndex, formerName, swIfName); interfaceNamingContext.removeName(formerName, writeContext.getMappingContext()); } // Removing disability of an interface in case a vxlan tunnel formerly deleted is being reused in VPP // further details in above comment if (interfaceDisableContext.isInterfaceDisabled(reply.swIfIndex, writeContext.getMappingContext())) { LOG.debug("Removing disability of vxlan tunnel, id: {}, name: {}", reply.swIfIndex, swIfName); interfaceDisableContext.removeDisabledInterface(reply.swIfIndex, writeContext.getMappingContext()); } // Add new interface to our interface context interfaceNamingContext.addName(reply.swIfIndex, swIfName, writeContext.getMappingContext()); } private boolean isIpv6(final Vxlan vxlan) { if (vxlan.getSrc().getIpv4Address() == null) { checkArgument(vxlan.getDst().getIpv4Address() == null, "Inconsistent ip addresses: %s, %s", vxlan.getSrc(), vxlan.getDst()); return true; } else { checkArgument(vxlan.getDst().getIpv6Address() == null, "Inconsistent ip addresses: %s, %s", vxlan.getSrc(), vxlan.getDst()); return false; } } private String getAddressString(final IpAddress addr) { return addr.getIpv4Address() == null ? addr.getIpv6Address().getValue() : addr.getIpv4Address().getValue(); } private void deleteVxlanTunnel(final InstanceIdentifier id, final String swIfName, final Vxlan vxlan, final WriteContext writeContext) throws VppBaseCallException, WriteTimeoutException { final byte isIpv6 = (byte) (isIpv6(vxlan) ? 1 : 0); final InetAddress srcAddress = InetAddresses.forString(getAddressString(vxlan.getSrc())); final InetAddress dstAddress = InetAddresses.forString(getAddressString(vxlan.getDst())); int encapVrfId = vxlan.getEncapVrfId().intValue(); int vni = vxlan.getVni().getValue().intValue(); LOG.debug("Deleting vxlan tunnel for interface: {}. Vxlan: {}", swIfName, vxlan); final CompletionStage vxlanAddDelTunnelReplyCompletionStage = getFutureJVpp().vxlanAddDelTunnel(getVxlanTunnelRequest((byte) 0 /* is add */, srcAddress.getAddress(), dstAddress.getAddress(), encapVrfId, -1, vni, isIpv6)); TranslateUtils.getReplyForWrite(vxlanAddDelTunnelReplyCompletionStage.toCompletableFuture(), id); LOG.debug("Vxlan tunnel deleted successfully for: {}, vxlan: {}", swIfName, vxlan); final int index = interfaceNamingContext.getIndex(swIfName, writeContext.getMappingContext()); // Mark this interface as disabled to not include it in operational reads // because VPP will keep the interface there LOG.debug("Marking vxlan tunnel as disabled, id: {}, name: {}", index, swIfName); interfaceDisableContext.disableInterface(index, writeContext.getMappingContext()); // Remove interface from our interface naming context interfaceNamingContext.removeName(swIfName, writeContext.getMappingContext()); } private static VxlanAddDelTunnel getVxlanTunnelRequest(final byte isAdd, final byte[] srcAddr, final byte[] dstAddr, final int encapVrfId, final int decapNextIndex, final int vni, final byte isIpv6) { final VxlanAddDelTunnel vxlanAddDelTunnel = new VxlanAddDelTunnel(); vxlanAddDelTunnel.isAdd = isAdd; vxlanAddDelTunnel.srcAddress = srcAddr; vxlanAddDelTunnel.dstAddress = dstAddr; vxlanAddDelTunnel.encapVrfId = encapVrfId; vxlanAddDelTunnel.vni = vni; vxlanAddDelTunnel.decapNextIndex = decapNextIndex; vxlanAddDelTunnel.isIpv6 = isIpv6; return vxlanAddDelTunnel; } }