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/*
* 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.hc2vpp.v3po.interfaces;
import io.fd.hc2vpp.common.translate.util.AbstractInterfaceTypeCustomizer;
import io.fd.hc2vpp.common.translate.util.AddressTranslator;
import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.jvpp.core.dto.GreTunnelAddDel;
import io.fd.jvpp.core.dto.GreTunnelAddDelReply;
import io.fd.jvpp.core.future.FutureJVppCore;
import java.util.concurrent.CompletionStage;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.v3po.rev190502.GreTunnel;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.v3po.rev190502.interfaces._interface.Gre;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev180220.InterfaceType;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev180220.interfaces.Interface;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GreCustomizer extends AbstractInterfaceTypeCustomizer<Gre> 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 GreTunnelAddDel getGreTunnelRequest(final byte isAdd, final IpAddressNoZone srcAddr,
final IpAddressNoZone dstAddr, final int outerFibId,
final byte isIpv6) {
final GreTunnelAddDel greTunnelAddDel = new GreTunnelAddDel();
greTunnelAddDel.isAdd = isAdd;
greTunnelAddDel.tunnel = new io.fd.jvpp.core.types.GreTunnel();
if (isIpv6==0) {
greTunnelAddDel.tunnel.src =
AddressTranslator.INSTANCE.ipv4AddressNoZoneToAddress(srcAddr.getIpv4AddressNoZone());
greTunnelAddDel.tunnel.dst =
AddressTranslator.INSTANCE.ipv4AddressNoZoneToAddress(dstAddr.getIpv4AddressNoZone());
} else {
greTunnelAddDel.tunnel.src =
AddressTranslator.INSTANCE.ipv6AddressToAddress(srcAddr.getIpv6AddressNoZone());
greTunnelAddDel.tunnel.dst =
AddressTranslator.INSTANCE.ipv6AddressToAddress(dstAddr.getIpv6AddressNoZone());
}
greTunnelAddDel.tunnel.outerFibId = outerFibId;
greTunnelAddDel.tunnel.isIpv6 = isIpv6;
return greTunnelAddDel;
}
@Override
protected Class<? extends InterfaceType> getExpectedInterfaceType() {
return GreTunnel.class;
}
@Override
protected final void writeInterface(@Nonnull final InstanceIdentifier<Gre> id, @Nonnull final Gre dataAfter,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
final String swIfName = id.firstKeyOf(Interface.class).getName();
createGreTunnel(id, swIfName, dataAfter, writeContext);
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Gre> id, @Nonnull final Gre dataBefore,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
final String swIfName = id.firstKeyOf(Interface.class).getName();
deleteGreTunnel(id, swIfName, dataBefore, writeContext);
}
private void createGreTunnel(final InstanceIdentifier<Gre> id, final String swIfName, final Gre gre,
final WriteContext writeContext) throws WriteFailedException {
final byte isIpv6 = (byte) (isIpv6(gre)
? 1
: 0);
int outerFibId = gre.getOuterFibId().intValue();
LOG.debug("Setting gre tunnel for interface: {}. Gre: {}", swIfName, gre);
final CompletionStage<GreTunnelAddDelReply> greAddDelTunnelReplyCompletionStage =
getFutureJVpp().greTunnelAddDel(getGreTunnelRequest((byte) 1 /* is add */, gre.getSrc(),
gre.getDst(), outerFibId, isIpv6));
final GreTunnelAddDelReply reply =
getReplyForCreate(greAddDelTunnelReplyCompletionStage.toCompletableFuture(), id, gre);
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) {
return gre.getSrc().getIpv4AddressNoZone() == null;
}
private void deleteGreTunnel(final InstanceIdentifier<Gre> id, final String swIfName, final Gre gre,
final WriteContext writeContext) throws WriteFailedException {
final byte isIpv6 = (byte) (isIpv6(gre)
? 1
: 0);
int outerFibId = gre.getOuterFibId().intValue();
LOG.debug("Deleting gre tunnel for interface: {}. Gre: {}", swIfName, gre);
final CompletionStage<GreTunnelAddDelReply> greAddDelTunnelReplyCompletionStage =
getFutureJVpp().greTunnelAddDel(getGreTunnelRequest((byte) 0 /* is add */, gre.getSrc(),
gre.getDst(), outerFibId, isIpv6));
getReplyForDelete(greAddDelTunnelReplyCompletionStage.toCompletableFuture(), id);
LOG.debug("Gre tunnel deleted successfully for: {}, gre: {}", swIfName, gre);
// Remove interface from our interface context
interfaceContext.removeName(swIfName, writeContext.getMappingContext());
}
}
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