/* * Copyright (c) 2016 Intel 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.util.AbstractInterfaceTypeCustomizer; import io.fd.honeycomb.translate.v3po.util.JvppReplyConsumer; import io.fd.honeycomb.translate.v3po.util.NamingContext; 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.GreTunnel; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Gre; import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; import org.openvpp.jvpp.VppBaseCallException; import org.openvpp.jvpp.core.dto.GreAddDelTunnel; import org.openvpp.jvpp.core.dto.GreAddDelTunnelReply; import org.openvpp.jvpp.core.future.FutureJVppCore; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class GreCustomizer extends AbstractInterfaceTypeCustomizer implements JvppReplyConsumer { private static final Logger LOG = LoggerFactory.getLogger(GreCustomizer.class); private final NamingContext interfaceContext; public GreCustomizer(final FutureJVppCore vppApi, final NamingContext interfaceContext) { super(vppApi); this.interfaceContext = interfaceContext; } private static GreAddDelTunnel getGreTunnelRequest(final byte isAdd, final byte[] srcAddr, final byte[] dstAddr, final int outerFibId, final byte isIpv6) { final GreAddDelTunnel greAddDelTunnel = new GreAddDelTunnel(); greAddDelTunnel.isAdd = isAdd; greAddDelTunnel.srcAddress = srcAddr; greAddDelTunnel.dstAddress = dstAddr; greAddDelTunnel.outerFibId = outerFibId; greAddDelTunnel.isIpv6 = isIpv6; return greAddDelTunnel; } @Override protected Class getExpectedInterfaceType() { return GreTunnel.class; } @Override protected final void writeInterface(@Nonnull final InstanceIdentifier id, @Nonnull final Gre dataAfter, @Nonnull final WriteContext writeContext) throws WriteFailedException { final String swIfName = id.firstKeyOf(Interface.class).getName(); try { createGreTunnel(id, swIfName, dataAfter, writeContext); } catch (VppBaseCallException | IllegalInterfaceTypeException e) { LOG.warn("Failed to set gre tunnel for interface: {}, gre: {}", swIfName, dataAfter, e); throw new WriteFailedException.CreateFailedException(id, dataAfter, e); } } @Override public void updateCurrentAttributes(@Nonnull final InstanceIdentifier id, @Nonnull final Gre dataBefore, @Nonnull final Gre dataAfter, @Nonnull final WriteContext writeContext) throws WriteFailedException.UpdateFailedException { throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, new UnsupportedOperationException("Gre tunnel update is not supported")); } @Override public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier id, @Nonnull final Gre dataBefore, @Nonnull final WriteContext writeContext) throws WriteFailedException { final String swIfName = id.firstKeyOf(Interface.class).getName(); try { deleteGreTunnel(id, swIfName, dataBefore, writeContext); } catch (VppBaseCallException e) { LOG.debug("Failed to delete gre tunnel for interface: {}, gre: {}", swIfName, dataBefore); throw new WriteFailedException.DeleteFailedException(id, e); } } private void createGreTunnel(final InstanceIdentifier id, final String swIfName, final Gre gre, final WriteContext writeContext) throws VppBaseCallException, WriteTimeoutException { final byte isIpv6 = (byte) (isIpv6(gre) ? 1 : 0); final InetAddress srcAddress = InetAddresses.forString(getAddressString(gre.getSrc())); final InetAddress dstAddress = InetAddresses.forString(getAddressString(gre.getDst())); int outerFibId = gre.getOuterFibId().intValue(); LOG.debug("Setting gre tunnel for interface: {}. Gre: {}", swIfName, gre); final CompletionStage greAddDelTunnelReplyCompletionStage = getFutureJVpp().greAddDelTunnel(getGreTunnelRequest((byte) 1 /* is add */, srcAddress.getAddress(), dstAddress.getAddress(), outerFibId, isIpv6)); final GreAddDelTunnelReply reply = getReplyForWrite(greAddDelTunnelReplyCompletionStage.toCompletableFuture(), id); LOG.debug("Gre tunnel set successfully for: {}, gre: {}", swIfName, gre); if (interfaceContext.containsName(reply.swIfIndex, writeContext.getMappingContext())) { // VPP keeps gre 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. gre_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 gre_tunnel0 -> 6 mapping and storing // new name for that ID final String formerName = interfaceContext.getName(reply.swIfIndex, writeContext.getMappingContext()); LOG.debug("Removing updated mapping of a gre tunnel, id: {}, former name: {}, new name: {}", reply.swIfIndex, formerName, swIfName); interfaceContext.removeName(formerName, writeContext.getMappingContext()); } // Add new interface to our interface context interfaceContext.addName(reply.swIfIndex, swIfName, writeContext.getMappingContext()); } private boolean isIpv6(final Gre gre) { if (gre.getSrc().getIpv4Address() == null) { checkArgument(gre.getDst().getIpv4Address() == null, "Inconsistent ip addresses: %s, %s", gre.getSrc(), gre.getDst()); return true; } else { checkArgument(gre.getDst().getIpv6Address() == null, "Inconsistent ip addresses: %s, %s", gre.getSrc(), gre.getDst()); return false; } } private String getAddressString(final IpAddress addr) { return addr.getIpv4Address() == null ? addr.getIpv6Address().getValue() : addr.getIpv4Address().getValue(); } private void deleteGreTunnel(final InstanceIdentifier id, final String swIfName, final Gre gre, final WriteContext writeContext) throws VppBaseCallException, WriteTimeoutException { final byte isIpv6 = (byte) (isIpv6(gre) ? 1 : 0); final InetAddress srcAddress = InetAddresses.forString(getAddressString(gre.getSrc())); final InetAddress dstAddress = InetAddresses.forString(getAddressString(gre.getDst())); int outerFibId = gre.getOuterFibId().intValue(); LOG.debug("Deleting gre tunnel for interface: {}. Gre: {}", swIfName, gre); final CompletionStage greAddDelTunnelReplyCompletionStage = getFutureJVpp().greAddDelTunnel(getGreTunnelRequest((byte) 0 /* is add */, srcAddress.getAddress(), dstAddress.getAddress(), outerFibId, isIpv6)); getReplyForWrite(greAddDelTunnelReplyCompletionStage.toCompletableFuture(), id); LOG.debug("Gre tunnel deleted successfully for: {}, gre: {}", swIfName, gre); // Remove interface from our interface context interfaceContext.removeName(swIfName, writeContext.getMappingContext()); } }