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/*
* 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.hc2vpp.routing.write;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import io.fd.hc2vpp.common.translate.util.NamingContext;
import io.fd.hc2vpp.fib.management.FibManagementIIds;
import io.fd.honeycomb.translate.MappingContext;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.routing.rev180319.RoutingProtocolVppAttr;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev180313.Static;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev180313.routing.control.plane.protocols.ControlPlaneProtocol;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev180313.routing.control.plane.protocols.ControlPlaneProtocolKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.Ipv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.Ipv6;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.VniReference;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.vpp.fib.table.management.fib.tables.Table;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.vpp.fib.table.management.fib.tables.TableKey;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Customizer for handling of write operations for {@link ControlPlaneProtocol}
*/
final class ControlPlaneProtocolCustomizer
implements ListWriterCustomizer<ControlPlaneProtocol, ControlPlaneProtocolKey> {
private final NamingContext routingProtocolContext;
ControlPlaneProtocolCustomizer(@Nonnull final NamingContext routingProtocolContext) {
this.routingProtocolContext = routingProtocolContext;
}
static Long extractTableId(final ControlPlaneProtocol protocol) {
final RoutingProtocolVppAttr vppAttr = protocol.augmentation(RoutingProtocolVppAttr.class);
checkState(vppAttr != null && vppAttr.getVppProtocolAttributes() != null,
"Vpp routing protocol attributes not defined");
return vppAttr.getVppProtocolAttributes().getPrimaryVrf().getValue();
}
static boolean isTablePresent(@Nonnull final TableKey tableKey, @Nonnull final WriteContext writeContext) {
return writeContext.readAfter(FibManagementIIds.FM_FIB_TABLES.child(Table.class, tableKey)).isPresent();
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<ControlPlaneProtocol> instanceIdentifier,
@Nonnull final ControlPlaneProtocol routingProtocol,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
routingProtocolContext.removeName(routingProtocol.getName(), writeContext.getMappingContext());
}
/**
* Checks whether control plane protocol is static(we support only static ones for now)
*/
private void checkIsStatic(final ControlPlaneProtocol routingProtocol) {
checkArgument(routingProtocol.getType() == Static.class, "Only static routes are allowed");
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<ControlPlaneProtocol> instanceIdentifier,
@Nonnull final ControlPlaneProtocol routingProtocol,
@Nonnull final WriteContext writeContext)
throws WriteFailedException {
checkIsStatic(routingProtocol);
final Long tableId = extractTableId(routingProtocol);
final MappingContext mappingContext = writeContext.getMappingContext();
final String newProtocolName = routingProtocol.getName();
// enclosed in synchronized block to prevent change of state after containsName/before addName
synchronized (routingProtocolContext) {
if (!routingProtocolContext.containsName(tableId.intValue(), mappingContext)) {
// Protocol supports both IPv4/IPv6, therefore checking if at least one exists. Proper table is checked
// afterwards in Ipv6 or IPv4 customizers
if (!isTablePresent(new TableKey(Ipv4.class, new VniReference(tableId)), writeContext) &&
!isTablePresent(new TableKey(Ipv6.class, new VniReference(tableId)), writeContext)) {
throw new WriteFailedException(instanceIdentifier,
String.format("VRF lookup table: %s not found for protocol: %s", tableId,
instanceIdentifier));
}
routingProtocolContext.addName(tableId.intValue(), newProtocolName, mappingContext);
} else {
// prevent to fail while restoring data(trying to remap already mapped name)
if (!newProtocolName.equals(routingProtocolContext.getName(tableId.intValue(), mappingContext))) {
throw new IllegalStateException(String.format(
"An attempt to assign protocol %s to table id %s. Table id already assigned to protocol %s",
newProtocolName, tableId,
routingProtocolContext.getName(tableId.intValue(), mappingContext)));
}
}
}
}
}
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