nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/write/ExternalIpPoolCustomizer.java

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package io.fd.honeycomb.nat.write;
  18
  19 import static com.google.common.base.Preconditions.checkArgument;
  20
  21 import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
  22 import io.fd.honeycomb.translate.vpp.util.Ipv4AddressRange;
  23 import io.fd.honeycomb.translate.vpp.util.Ipv4Translator;
  24 import io.fd.honeycomb.translate.vpp.util.JvppReplyConsumer;
  25 import io.fd.honeycomb.translate.write.WriteContext;
  26 import io.fd.honeycomb.translate.write.WriteFailedException;
  27 import io.fd.vpp.jvpp.snat.dto.SnatAddAddressRange;
  28 import io.fd.vpp.jvpp.snat.future.FutureJVppSnatFacade;
  29 import javax.annotation.Nonnull;
  30 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  31 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.config.nat.instances.NatInstance;
  32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.parameters.ExternalIpAddressPool;
  33 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.parameters.ExternalIpAddressPoolKey;
  34 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 final class ExternalIpPoolCustomizer implements ListWriterCustomizer<ExternalIpAddressPool, ExternalIpAddressPoolKey>,
  39         JvppReplyConsumer, Ipv4Translator {
  40
  41     private static final Logger LOG = LoggerFactory.getLogger(ExternalIpPoolCustomizer.class);
  42
  43     private final FutureJVppSnatFacade jvppSnat;
  44
  45     ExternalIpPoolCustomizer(@Nonnull final FutureJVppSnatFacade jvppSnat) {
  46         this.jvppSnat = jvppSnat;
  47     }
  48
  49     @Override
  50     public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id,
  51                                        @Nonnull final ExternalIpAddressPool dataAfter,
  52                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
  53         checkArgument(id.firstKeyOf(NatInstance.class).getId() == 0,
  54                 "External IP pools are only assignable for nat instance(vrf-id) with ID 0");
  55         LOG.trace("Adding address range:{}, as: {}", id, dataAfter);
  56         // TODO check overlaps ? VPP-478 maybe no necessary, depending on how VPP handles them
  57         getReplyForCreate(jvppSnat.snatAddAddressRange(
  58                 getRequest(dataAfter.getExternalIpPool(), true)).toCompletableFuture(), id, dataAfter);
  59         LOG.debug("Address range: {} added successfully", id);
  60     }
  61
  62     @Override
  63     public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id,
  64                                         @Nonnull final ExternalIpAddressPool dataBefore,
  65                                         @Nonnull final ExternalIpAddressPool dataAfter,
  66                                         @Nonnull final WriteContext writeContext) throws WriteFailedException {
  67         throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter,
  68                 new UnsupportedOperationException("Address range update is not supported"));
  69     }
  70
  71     @Override
  72     public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id,
  73                                         @Nonnull final ExternalIpAddressPool dataBefore,
  74                                         @Nonnull final WriteContext writeContext) throws WriteFailedException {
  75         LOG.trace("Deleting address range:{}, as: {}", id, dataBefore);
  76         getReplyForDelete(jvppSnat.snatAddAddressRange(
  77                 getRequest(dataBefore.getExternalIpPool(), false)).toCompletableFuture(), id);
  78         LOG.debug("Deleting range: {} added successfully", id);
  79     }
  80
  81     private SnatAddAddressRange getRequest(final Ipv4Prefix externalIpPool, boolean isAdd) {
  82         SnatAddAddressRange request = new SnatAddAddressRange();
  83         // SNAT supports only IPv4 now, so does the model
  84         final Ipv4AddressRange range = Ipv4AddressRange.fromPrefix(externalIpPool);
  85         LOG.trace("Handling address range: {}", range);
  86         request.isIp4 = 1;
  87         request.isAdd = (byte) (isAdd ? 1 : 0);
  88         request.firstIpAddress = ipv4AddressNoZoneToArray(range.getStart());
  89         request.lastIpAddress = ipv4AddressNoZoneToArray(range.getEnd());
  90         return request;
  91     }
  92 }