HC2VPP-168 - Gpe native entries support(write only)

 requires https://gerrit.fd.io/r/#/c/7168 to be merged

Change-Id: I5b734af662e651df5753f64f14b6b44d863ecbe8
Signed-off-by: Jan Srnicek <jsrnicek@cisco.com>

6 files changed, 482 insertions, 2 deletions

diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/GpeWriterFactory.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/GpeWriterFactory.java
index ae5db0269..18bea7c9d 100644
--- a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/GpeWriterFactory.java
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/GpeWriterFactory.java
@@ -32,6 +32,9 @@ import javax.annotation.Nonnull;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.Gpe;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.NativeForwardPathsTables;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTable;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPath;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.gpe.entry.table.grouping.GpeEntryTable;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.gpe.entry.table.grouping.gpe.entry.table.GpeEntry;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.gpe.entry.table.grouping.gpe.entry.table.gpe.entry.LocalEid;
@@ -52,7 +55,7 @@ public class GpeWriterFactory implements WriterFactory {
             GPE_FEATURE_ID = GPE_ID.child(GpeFeatureData.class);
     private static final InstanceIdentifier<GpeEntry>
             GPE_ENTRY_ID = GPE_FEATURE_ID.child(GpeEntryTable.class).child(GpeEntry.class);
-    public static final InstanceIdentifier<Interface>
+    private static final InstanceIdentifier<Interface>
             IFC_ID = InstanceIdentifier.create(Interfaces.class).child(Interface.class);
 
     @Inject
@@ -69,6 +72,10 @@ public class GpeWriterFactory implements WriterFactory {
     @Named(GpeModule.GPE_TO_LOCATOR_PAIR_CTX)
     private GpeLocatorPairMappingContext gpeLocatorPairMappingContext;
 
+    @Inject
+    @Named("interface-context")
+    private NamingContext interfaceContext;
+
 
     @Override
     public void init(@Nonnull final ModifiableWriterRegistryBuilder registry) {
@@ -92,6 +99,13 @@ public class GpeWriterFactory implements WriterFactory {
                 IFC_ID.augmentation(SubinterfaceAugmentation.class).child(SubInterfaces.class)
                         .child(SubInterface.class));
 
-
+        final InstanceIdentifier<NativeForwardPathsTable> nativeEntryTableId =
+                InstanceIdentifier.create(NativeForwardPathsTables.class).child(NativeForwardPathsTable.class);
+        // gpe_add_del_iface is used to create fib table, so must be written before interfaces, to ensure
+        // byproduct iface is created before there's an attempt to set its flags
+        registry.addBefore(new GenericListWriter<>(nativeEntryTableId, new NativeForwardPathsTableCustomizer(api)),
+                IFC_ID);
+        registry.add(new GenericListWriter<>(nativeEntryTableId.child(NativeForwardPath.class),
+                new NativeForwardPathCustomizer(api, interfaceContext)));
     }
 }
diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizer.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizer.java
new file mode 100644
index 000000000..0dcb434e4
--- /dev/null
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizer.java
@@ -0,0 +1,110 @@
+/*
+ * 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.lisp.gpe.translate.write;
+
+import static io.fd.hc2vpp.lisp.gpe.translate.write.NativeForwardPathsTableCustomizer.tableId;
+
+import io.fd.hc2vpp.common.translate.util.AddressTranslator;
+import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
+import io.fd.hc2vpp.common.translate.util.JvppReplyConsumer;
+import io.fd.hc2vpp.common.translate.util.NamingContext;
+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 io.fd.vpp.jvpp.core.dto.GpeAddDelNativeFwdRpath;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import java.util.Optional;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPath;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPathKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class NativeForwardPathCustomizer extends FutureJVppCustomizer
+        implements ListWriterCustomizer<NativeForwardPath, NativeForwardPathKey>, AddressTranslator, JvppReplyConsumer {
+
+    private final NamingContext interfaceContext;
+
+    public NativeForwardPathCustomizer(@Nonnull final FutureJVppCore futureJVppCore,
+                                       @Nonnull final NamingContext interfaceContext) {
+        super(futureJVppCore);
+        this.interfaceContext = interfaceContext;
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPath> id,
+                                       @Nonnull final NativeForwardPath dataAfter,
+                                       @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        createNativePath(id, dataAfter, writeContext);
+    }
+
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPath> id,
+                                        @Nonnull final NativeForwardPath dataBefore,
+                                        @Nonnull final NativeForwardPath dataAfter,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        deleteNativePath(id, dataBefore, writeContext);
+        createNativePath(id, dataAfter, writeContext);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPath> id,
+                                        @Nonnull final NativeForwardPath dataBefore,
+                                        @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        deleteNativePath(id, dataBefore, writeContext);
+    }
+
+    private GpeAddDelNativeFwdRpath getRequest(final boolean isAdd,
+                                               final int tableId,
+                                               final NativeForwardPath data,
+                                               final MappingContext mappingContext) {
+        GpeAddDelNativeFwdRpath request = new GpeAddDelNativeFwdRpath();
+
+        final IpAddress nextHopAddress = data.getNextHopAddress();
+
+        request.tableId = tableId;
+        request.isAdd = booleanToByte(isAdd);
+        request.isIp4 = booleanToByte(!isIpv6(nextHopAddress));
+        request.nhAddr = ipAddressToArray(nextHopAddress);
+        request.nhSwIfIndex = Optional.ofNullable(data.getNextHopInterface())
+                .map(String::trim)
+                .map(ifaceName -> interfaceContext.getIndex(ifaceName, mappingContext))
+                .orElse(~0);
+
+        return request;
+    }
+
+    private void createNativePath(final InstanceIdentifier<NativeForwardPath> id,
+                                  final NativeForwardPath data,
+                                  final WriteContext ctx) throws WriteFailedException {
+        getReplyForCreate(getFutureJVpp()
+                .gpeAddDelNativeFwdRpath(getRequest(true, tableId(id), data, ctx.getMappingContext()))
+                .toCompletableFuture(), id, data);
+    }
+
+    private void deleteNativePath(final InstanceIdentifier<NativeForwardPath> id,
+                                  final NativeForwardPath data,
+                                  final WriteContext ctx) throws WriteFailedException {
+        getReplyForDelete(getFutureJVpp()
+                .gpeAddDelNativeFwdRpath(getRequest(false, tableId(id), data, ctx.getMappingContext()))
+                .toCompletableFuture(), id);
+    }
+}
diff --git a/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizer.java b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizer.java
new file mode 100644
index 000000000..a9030a7c4
--- /dev/null
+++ b/lisp/lisp2vpp/src/main/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizer.java
@@ -0,0 +1,101 @@
+/*
+ * 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.lisp.gpe.translate.write;
+
+import io.fd.hc2vpp.common.translate.util.ByteDataTranslator;
+import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
+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.GpeAddDelIface;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTable;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTableKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Uses api to create gpe interfaces, which creates fib table as by-product.
+ * There is currently no other lisp-specific way to define fib table, as native paths expects existing table id
+ */
+public class NativeForwardPathsTableCustomizer extends FutureJVppCustomizer
+        implements ListWriterCustomizer<NativeForwardPathsTable, NativeForwardPathsTableKey>, ByteDataTranslator,
+        JvppReplyConsumer {
+
+    private static final Logger LOG = LoggerFactory.getLogger(NativeForwardPathsTableCustomizer.class);
+
+    public NativeForwardPathsTableCustomizer(@Nonnull final FutureJVppCore futureJVppCore) {
+        super(futureJVppCore);
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPathsTable> id,
+                                       @Nonnull final NativeForwardPathsTable dataAfter,
+                                       @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        createFibTable(id, dataAfter);
+    }
+
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPathsTable> id,
+                                        @Nonnull final NativeForwardPathsTable dataBefore,
+                                        @Nonnull final NativeForwardPathsTable dataAfter,
+                                        @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        // not sure if update makes sense, but just in case
+        deleteFibTable(id);
+        createFibTable(id, dataAfter);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<NativeForwardPathsTable> id,
+                                        @Nonnull final NativeForwardPathsTable dataBefore,
+                                        @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        deleteFibTable(id);
+    }
+
+    private void createFibTable(final InstanceIdentifier<NativeForwardPathsTable> id,
+                                final NativeForwardPathsTable data) throws WriteFailedException {
+        getReplyForCreate(getFutureJVpp().gpeAddDelIface(getRequest(true, id)).toCompletableFuture(), id, data);
+    }
+
+    private void deleteFibTable(final InstanceIdentifier<NativeForwardPathsTable> id) throws WriteFailedException {
+        getReplyForDelete(getFutureJVpp().gpeAddDelIface(getRequest(false, id)).toCompletableFuture(), id);
+    }
+
+    /**
+     * Maps dpTable and vni to tableId,this also allows to dump lisp specific tables by dumping vni's
+     */
+    private GpeAddDelIface getRequest(final boolean add, final InstanceIdentifier<NativeForwardPathsTable> id) {
+        GpeAddDelIface request = new GpeAddDelIface();
+        request.isL2 = 0;
+        // expects reversed order
+        request.dpTable = tableId(id);
+        request.vni = request.dpTable; // vni must be unique for every table
+        request.isAdd = booleanToByte(add);
+        return request;
+    }
+
+    static int tableId(final InstanceIdentifier<?> id) {
+        return id.firstKeyOf(NativeForwardPathsTable.class).getTableId().intValue();
+    }
+}
diff --git a/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/GpeModuleTest.java b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/GpeModuleTest.java
index 2d5dd8b11..982239c80 100644
--- a/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/GpeModuleTest.java
+++ b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/GpeModuleTest.java
@@ -25,8 +25,10 @@ import static org.mockito.MockitoAnnotations.initMocks;
 
 import com.google.inject.Guice;
 import com.google.inject.Inject;
+import com.google.inject.name.Named;
 import com.google.inject.testing.fieldbinder.Bind;
 import com.google.inject.testing.fieldbinder.BoundFieldModule;
+import io.fd.hc2vpp.common.translate.util.NamingContext;
 import io.fd.hc2vpp.lisp.gpe.GpeModule;
 import io.fd.honeycomb.translate.impl.read.registry.CompositeReaderRegistryBuilder;
 import io.fd.honeycomb.translate.impl.write.registry.FlatWriterRegistryBuilder;
@@ -52,9 +54,14 @@ public class GpeModuleTest {
     @Inject
     private Set<WriterFactory> writerFactories = new HashSet<>();
 
+    @Named("interface-context")
+    @Bind
+    private NamingContext interfaceContext;
+
     @Before
     public void setUp() throws Exception {
         initMocks(this);
+        interfaceContext = new NamingContext("interfaceContext", "interfaceContext");
         Guice.createInjector(new GpeModule(), BoundFieldModule.of(this)).injectMembers(this);
     }
 
diff --git a/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizerTest.java b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizerTest.java
new file mode 100644
index 000000000..2ce9789cd
--- /dev/null
+++ b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathCustomizerTest.java
@@ -0,0 +1,132 @@
+/*
+ * 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.lisp.gpe.translate.write;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import io.fd.hc2vpp.common.test.write.WriterCustomizerTest;
+import io.fd.hc2vpp.common.translate.util.NamingContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.core.dto.GpeAddDelNativeFwdRpath;
+import io.fd.vpp.jvpp.core.dto.GpeAddDelNativeFwdRpathReply;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.NativeForwardPathsTables;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTable;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTableKey;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPath;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPathBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables._native.forward.paths.table.NativeForwardPathKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class NativeForwardPathCustomizerTest extends WriterCustomizerTest {
+
+    private static final long TABLE_ID = 1L;
+    private static final String IFC_CTX = "ifc-ctx";
+    private static final String ETH_0 = "eth-0";
+    private static final String ETH_1 = "eth-1";
+    private static final int ETH_0_IDX = 2;
+    private static final int ETH_1_IDX = 7;
+    private static final byte[] V4_WITH_IF_ADDR = {-64, -88, 2, 1};
+    private static final byte[] V4_WITHOUT_IF_ADDR = {-64, -88, 2, 3};
+    private static final byte[] V6_WITH_IF_ADDR = {32, 1, 13, -72, 10, 11, 18, -16, 0, 0, 0, 0, 0, 0, 0, 1};
+
+    private NamingContext ifcCtx;
+    private NativeForwardPathCustomizer customizer;
+    private InstanceIdentifier<NativeForwardPath> validId;
+
+    @Captor
+    private ArgumentCaptor<GpeAddDelNativeFwdRpath> requestCaptor;
+
+    @Override
+    protected void setUpTest() throws Exception {
+        ifcCtx = new NamingContext("iface", IFC_CTX);
+        defineMapping(mappingContext, ETH_0, ETH_0_IDX, IFC_CTX);
+        defineMapping(mappingContext, ETH_1, ETH_1_IDX, IFC_CTX);
+        customizer = new NativeForwardPathCustomizer(api, ifcCtx);
+        validId = InstanceIdentifier.create(NativeForwardPathsTables.class)
+                .child(NativeForwardPathsTable.class, new NativeForwardPathsTableKey(TABLE_ID))
+                .child(NativeForwardPath.class,
+                        new NativeForwardPathKey(new IpAddress(new Ipv4Address("192.168.2.1"))));
+        when(api.gpeAddDelNativeFwdRpath(any())).thenReturn(future(new GpeAddDelNativeFwdRpathReply()));
+    }
+
+    @Test
+    public void testWriteV4WithIfc() throws WriteFailedException {
+        customizer.writeCurrentAttributes(validId, v4WithIfc(), writeContext);
+        verify(api, times(1)).gpeAddDelNativeFwdRpath(requestCaptor.capture());
+        final GpeAddDelNativeFwdRpath request = requestCaptor.getValue();
+        assertEquals(desiredRequest(1, 1, V4_WITH_IF_ADDR, ETH_0_IDX, (int) TABLE_ID), request);
+    }
+
+    @Test
+    public void testWriteV4WithoutIfc() throws WriteFailedException {
+        customizer.writeCurrentAttributes(validId, v4WithoutIfc(), writeContext);
+        verify(api, times(1)).gpeAddDelNativeFwdRpath(requestCaptor.capture());
+        final GpeAddDelNativeFwdRpath request = requestCaptor.getValue();
+        assertEquals(desiredRequest(1, 1, V4_WITHOUT_IF_ADDR, ~0, (int) TABLE_ID), request);
+    }
+
+    @Test
+    public void testWriteV6() throws WriteFailedException {
+        customizer.writeCurrentAttributes(validId, v6WithIfc(), writeContext);
+        verify(api, times(1)).gpeAddDelNativeFwdRpath(requestCaptor.capture());
+        final GpeAddDelNativeFwdRpath request = requestCaptor.getValue();
+        assertEquals(desiredRequest(1, 0, V6_WITH_IF_ADDR, ETH_1_IDX, (int) TABLE_ID), request);
+    }
+
+    private static GpeAddDelNativeFwdRpath desiredRequest(final int add, final int isV4,
+                                                          final byte[] addr, final int swIfIndex,
+                                                          final int tableId) {
+        GpeAddDelNativeFwdRpath request = new GpeAddDelNativeFwdRpath();
+        request.isAdd = (byte) add;
+        request.isIp4 = (byte) isV4;
+        request.nhAddr = addr;
+        request.nhSwIfIndex = swIfIndex;
+        request.tableId = tableId;
+
+        return request;
+    }
+
+    private static NativeForwardPath v6WithIfc() {
+        return new NativeForwardPathBuilder()
+                .setNextHopAddress(new IpAddress(new Ipv6Address("2001:0db8:0a0b:12f0:0000:0000:0000:0001")))
+                .setNextHopInterface(ETH_1)
+                .build();
+    }
+
+    private static NativeForwardPath v4WithoutIfc() {
+        return new NativeForwardPathBuilder()
+                .setNextHopAddress(new IpAddress(new Ipv4Address("192.168.2.3")))
+                .build();
+    }
+
+    private static NativeForwardPath v4WithIfc() {
+        return new NativeForwardPathBuilder()
+                .setNextHopAddress(new IpAddress(new Ipv4Address("192.168.2.1")))
+                .setNextHopInterface(ETH_0)
+                .build();
+    }
+}
\ No newline at end of file
diff --git a/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizerTest.java b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizerTest.java
new file mode 100644
index 000000000..923aaad44
--- /dev/null
+++ b/lisp/lisp2vpp/src/test/java/io/fd/hc2vpp/lisp/gpe/translate/write/NativeForwardPathsTableCustomizerTest.java
@@ -0,0 +1,116 @@
+/*
+ * 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.lisp.gpe.translate.write;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import io.fd.hc2vpp.common.test.write.WriterCustomizerTest;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.core.dto.GpeAddDelIface;
+import io.fd.vpp.jvpp.core.dto.GpeAddDelIfaceReply;
+import io.fd.vpp.jvpp.core.dto.GpeAddDelNativeFwdRpathReply;
+import java.util.List;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518.NativeForwardPathsTables;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTable;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTableBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.gpe.rev170518._native.forward.paths.tables.NativeForwardPathsTableKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class NativeForwardPathsTableCustomizerTest extends WriterCustomizerTest {
+
+    private static final long TABLE_ID = 1L;
+    private NativeForwardPathsTableCustomizer customizer;
+    private InstanceIdentifier<NativeForwardPathsTable> validId;
+
+    @Captor
+    private ArgumentCaptor<GpeAddDelIface> requestCaptor;
+
+    @Override
+    protected void setUpTest() throws Exception {
+        customizer = new NativeForwardPathsTableCustomizer(api);
+        validId = InstanceIdentifier.create(NativeForwardPathsTables.class)
+                .child(NativeForwardPathsTable.class, new NativeForwardPathsTableKey(TABLE_ID));
+        when(api.gpeAddDelIface(any())).thenReturn(future(new GpeAddDelIfaceReply()));
+    }
+
+    @Test
+    public void testWriteValid() throws WriteFailedException {
+        when(api.gpeAddDelNativeFwdRpath(any())).thenReturn(future(new GpeAddDelNativeFwdRpathReply()));
+        customizer.writeCurrentAttributes(validId, validTable(), writeContext);
+        verify(api, times(1)).gpeAddDelIface(requestCaptor.capture());
+
+        final List<GpeAddDelIface> requests = requestCaptor.getAllValues();
+
+        assertEquals(desiredRequest(1, 1), requests.get(0));
+    }
+
+    @Test
+    public void testDeleteValid() throws WriteFailedException {
+        when(api.gpeAddDelNativeFwdRpath(any())).thenReturn(future(new GpeAddDelNativeFwdRpathReply()));
+        customizer.deleteCurrentAttributes(validId, validTable(), writeContext);
+        verify(api, times(1)).gpeAddDelIface(requestCaptor.capture());
+
+        final List<GpeAddDelIface> requests = requestCaptor.getAllValues();
+
+        assertEquals(desiredRequest(0, 1), requests.get(0));
+    }
+
+    @Test
+    public void testUpdateValid() throws WriteFailedException {
+        when(api.gpeAddDelNativeFwdRpath(any())).thenReturn(future(new GpeAddDelNativeFwdRpathReply()));
+        customizer.updateCurrentAttributes(validId, validTableBefore(), validTable(), writeContext);
+        verify(api, times(2)).gpeAddDelIface(requestCaptor.capture());
+
+        final List<GpeAddDelIface> requests = requestCaptor.getAllValues();
+
+        // removes one from old data
+        assertEquals(desiredRequest(0, 1), requests.get(0));
+
+        // defines 3 new
+        assertEquals(desiredRequest(1, 1), requests.get(1));
+    }
+
+
+    private GpeAddDelIface desiredRequest(final int isAdd, final int tableId) {
+        GpeAddDelIface request = new GpeAddDelIface();
+
+        request.isL2 = 0;
+        request.dpTable = tableId;
+        request.vni = request.dpTable;
+        request.isAdd = (byte) isAdd;
+        return request;
+    }
+
+    private NativeForwardPathsTable validTableBefore() {
+        return new NativeForwardPathsTableBuilder()
+                .setTableId(TABLE_ID)
+                .build();
+    }
+
+    private NativeForwardPathsTable validTable() {
+        return new NativeForwardPathsTableBuilder()
+                .setTableId(TABLE_ID)
+                .build();
+    }
+}
\ No newline at end of file