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/*
* Copyright (c) 2017 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.dhcp.write;
import static com.google.common.base.Preconditions.checkArgument;
import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
import io.fd.hc2vpp.common.translate.util.Ipv4Translator;
import io.fd.hc2vpp.common.translate.util.Ipv6Translator;
import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.DhcpProxyConfig;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import java.util.List;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.dhcp.rev180629.dhcp.attributes.relays.Relay;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.dhcp.rev180629.dhcp.attributes.relays.RelayKey;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.dhcp.rev180629.relay.attributes.Server;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.fib.table.management.rev180521.Ipv6;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class DhcpRelayCustomizer extends FutureJVppCustomizer implements ListWriterCustomizer<Relay, RelayKey>,
JvppReplyConsumer, ByteDataTranslator, Ipv6Translator, Ipv4Translator {
private static final Logger LOG = LoggerFactory.getLogger(DhcpRelayCustomizer.class);
DhcpRelayCustomizer(final FutureJVppCore vppApi) {
super(vppApi);
}
@Override
public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Relay> id, @Nonnull final Relay dataAfter,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Writing Relay {} dataAfter={}", id, dataAfter);
checkArgument(dataAfter.getServer() != null && !dataAfter.getServer().isEmpty(), "At least one DHCP server needs to be configured");
for (final Server server : dataAfter.getServer()) {
setRelay(id, dataAfter, server, true);
}
}
@Override
public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Relay> id, @Nonnull final Relay dataBefore,
@Nonnull final Relay dataAfter, @Nonnull final WriteContext writeContext)
throws WriteFailedException {
LOG.debug("Updating Relay {} before={} after={}", id, dataBefore, dataAfter);
final List<Server> serversBefore = dataBefore.getServer();
checkArgument(serversBefore != null && !serversBefore.isEmpty(),
"At least one DHCP server needs to be configured before update operation");
final List<Server> serversAfter = dataAfter.getServer();
checkArgument(serversAfter != null && !serversAfter.isEmpty(),
"At least one DHCP server needs to be configured after update operation");
// remove old servers (we do not expect many, so no need for efficient search):
for (final Server server : serversBefore) {
if (!serversAfter.contains(server)) {
setRelay(id, dataAfter, server, false);
}
}
// and add new ones:
for (final Server server : serversAfter) {
if (!serversBefore.contains(server)) {
setRelay(id, dataAfter, server, true);
}
}
}
@Override
public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Relay> id, @Nonnull final Relay dataBefore,
@Nonnull final WriteContext writeContext) throws WriteFailedException {
LOG.debug("Removing Relay {} dataBefore={}", id, dataBefore);
checkArgument(dataBefore.getServer() != null && !dataBefore.getServer().isEmpty(),
"At least one DHCP server needs to be configured");
for (final Server server : dataBefore.getServer()) {
setRelay(id, dataBefore, server, false);
}
}
private void setRelay(final InstanceIdentifier<Relay> id, final Relay relay, final Server server,
final boolean isAdd)
throws WriteFailedException {
final DhcpProxyConfig request = new DhcpProxyConfig();
request.rxVrfId = relay.getRxVrfId().getValue().byteValue();
final boolean isIpv6 = Ipv6.class == relay.getAddressFamily();
request.isIpv6 = booleanToByte(isIpv6);
request.serverVrfId = server.getVrfId().intValue();
request.isAdd = booleanToByte(isAdd);
request.dhcpServer = parseAddress(server.getAddress(), isIpv6);
request.dhcpSrcAddress = parseAddress(relay.getGatewayAddress(), isIpv6);
LOG.debug("DHCP config change id={} request={}", id, request);
getReplyForWrite(getFutureJVpp().dhcpProxyConfig(request).toCompletableFuture(), id);
}
private byte[] parseAddress(@Nonnull final IpAddressNoZone address, final boolean isIpv6) {
if (isIpv6) {
return ipv6AddressNoZoneToArray(address.getIpv6AddressNoZone());
} else {
return ipv4AddressNoZoneToArray(address.getIpv4AddressNoZone());
}
}
}
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