1 files changed, 134 insertions, 0 deletions
diff --git a/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ExternalIpPoolCustomizer.java b/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ExternalIpPoolCustomizer.java
new file mode 100644
index 000000000..206b15e63
--- /dev/null
+++ b/nat/nat2vpp/src/main/java/io/fd/honeycomb/nat/read/ExternalIpPoolCustomizer.java
@@ -0,0 +1,134 @@
+/*
+ * 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.honeycomb.nat.read;
+
+import io.fd.honeycomb.translate.read.ReadContext;
+import io.fd.honeycomb.translate.read.ReadFailedException;
+import io.fd.honeycomb.translate.spi.read.ListReaderCustomizer;
+import io.fd.honeycomb.translate.util.read.cache.DumpCacheManager;
+import io.fd.honeycomb.translate.util.read.cache.EntityDumpExecutor;
+import io.fd.honeycomb.translate.vpp.util.Ipv4Translator;
+import io.fd.honeycomb.translate.vpp.util.JvppReplyConsumer;
+import io.fd.vpp.jvpp.snat.dto.SnatAddressDetails;
+import io.fd.vpp.jvpp.snat.dto.SnatAddressDetailsReplyDump;
+import io.fd.vpp.jvpp.snat.dto.SnatAddressDump;
+import io.fd.vpp.jvpp.snat.future.FutureJVppSnatFacade;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.LongStream;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.parameters.ExternalIpAddressPool;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.parameters.ExternalIpAddressPoolBuilder;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.parameters.ExternalIpAddressPoolKey;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.state.nat.instances.NatInstance;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.state.nat.instances.NatInstanceKey;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.nat.rev150908.nat.state.nat.instances.nat.instance.NatCurrentConfigBuilder;
+import org.opendaylight.yangtools.concepts.Builder;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class ExternalIpPoolCustomizer implements
+        ListReaderCustomizer<ExternalIpAddressPool, ExternalIpAddressPoolKey, ExternalIpAddressPoolBuilder>,
+        JvppReplyConsumer, Ipv4Translator {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ExternalIpPoolCustomizer.class);
+
+    private final DumpCacheManager<SnatAddressDetailsReplyDump, Void> dumpMgr;
+
+    ExternalIpPoolCustomizer(final DumpCacheManager<SnatAddressDetailsReplyDump, Void> dumpMgr) {
+        this.dumpMgr = dumpMgr;
+    }
+
+    @Nonnull
+    @Override
+    public ExternalIpAddressPoolBuilder getBuilder(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id) {
+        return new ExternalIpAddressPoolBuilder();
+    }
+
+    @Override
+    public void readCurrentAttributes(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id,
+                                      @Nonnull final ExternalIpAddressPoolBuilder builder,
+                                      @Nonnull final ReadContext ctx) throws ReadFailedException {
+        LOG.trace("Reading current attributes for external IP pool: {}", id);
+
+        final Long poolId = id.firstKeyOf(ExternalIpAddressPool.class).getPoolId();
+        final SnatAddressDetails details =
+                dumpMgr.getDump(id, getClass().getName(), ctx.getModificationCache(), null)
+                        .or(new SnatAddressDetailsReplyDump()).snatAddressDetails.get(Math.toIntExact(poolId));
+
+        builder.setExternalIpPool(new Ipv4Prefix(arrayToIpv4AddressNoZoneReversed(details.ipAddress).getValue() + "/32"));
+        builder.setPoolId(poolId);
+
+        LOG.trace("External IP pool: {}. Read as: {}", id, builder);
+    }
+
+    @Nonnull
+    @Override
+    public List<ExternalIpAddressPoolKey> getAllIds(@Nonnull final InstanceIdentifier<ExternalIpAddressPool> id,
+                                                    @Nonnull final ReadContext ctx) throws ReadFailedException {
+        final NatInstanceKey natKey = id.firstKeyOf(NatInstance.class);
+        if (!natKey.equals(NatInstanceCustomizer.DEFAULT_VRF_ID)) {
+            // IP Pools are not vrf aware ... so they are only visible under default vrf (nat-instance)
+            return Collections.emptyList();
+        }
+
+        LOG.trace("Listing IDs for all external IP pools within nat-instance(vrf):{}", natKey);
+
+        // Since VPP returns every single (unordered) address instead of address range,
+        // there is no way to determine what the original ranges were when writing the data into VPP.
+
+        // That's why the write and read is not symmetrical in terms of data structure, instead,
+        // this customizer also returns every single address as a 32 prefix and assigns an artificial key to them
+
+        final long addressCount = dumpMgr.getDump(id, getClass().getName(), ctx.getModificationCache(), null)
+                .or(new SnatAddressDetailsReplyDump()).snatAddressDetails.stream()
+                .count();
+
+        final List<ExternalIpAddressPoolKey> ids = LongStream.range(0, addressCount)
+                .mapToObj(ExternalIpAddressPoolKey::new)
+                .collect(Collectors.toList());
+
+        LOG.trace("List of external IP pool ids: {}", ids);
+        return ids;
+    }
+
+    @Override
+    public void merge(@Nonnull final Builder<? extends DataObject> builder,
+                      @Nonnull final List<ExternalIpAddressPool> readData) {
+        ((NatCurrentConfigBuilder) builder).setExternalIpAddressPool(readData);
+    }
+
+    static final class AddressRangeDumpExecutor implements EntityDumpExecutor<SnatAddressDetailsReplyDump, Void>,
+            JvppReplyConsumer {
+        private final FutureJVppSnatFacade jvppSnat;
+
+        AddressRangeDumpExecutor(final FutureJVppSnatFacade jvppSnat) {
+            this.jvppSnat = jvppSnat;
+        }
+
+        @Nonnull
+        @Override
+        public SnatAddressDetailsReplyDump executeDump(final InstanceIdentifier<?> identifier, final Void params)
+                throws ReadFailedException {
+            return getReplyForRead(jvppSnat.snatAddressDump(new SnatAddressDump()).toCompletableFuture(), identifier);
+        }
+    }
+}