HC2VPP-257: MPLS interface management

Translates
/hc2vpp-ietf-routing:routing/hc2vpp-ietf-mpls:mpls/interface

to
sw_interface_set_mpls_enable

which is equivalent to:
set interface mpls [...] enable

MPLS table is created before configuring MPLS
using mpls_table_add_del (required since VPP 17.10).

Reading MPLS configuration state is not supported
(VPP API is missing).

Change-Id: I3f1b987c3669b0836a27649a711e75d0dc37a779
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

3 files changed, 217 insertions, 0 deletions

diff --git a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsInterfaceCustomizer.java b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsInterfaceCustomizer.java
new file mode 100644
index 000000000..718a69924
--- /dev/null
+++ b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsInterfaceCustomizer.java
@@ -0,0 +1,114 @@
+/*
+ * 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.mpls;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.Objects.requireNonNull;
+
+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.hc2vpp.common.translate.util.NamingContext;
+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.MplsTableAddDel;
+import io.fd.vpp.jvpp.core.dto.SwInterfaceSetMplsEnable;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls.rev170702.interfaces.mpls.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls.rev170702.interfaces.mpls.InterfaceKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+final class MplsInterfaceCustomizer extends FutureJVppCustomizer
+    implements ListWriterCustomizer<Interface, InterfaceKey>, JvppReplyConsumer, ByteDataTranslator {
+
+    private static final Logger LOG = LoggerFactory.getLogger(MplsInterfaceCustomizer.class);
+
+    private final NamingContext ifcContext;
+
+    MplsInterfaceCustomizer(@Nonnull final FutureJVppCore vppApi, @Nonnull final NamingContext ifcContext) {
+        super(vppApi);
+        this.ifcContext = requireNonNull(ifcContext, "ifcContext should not be null");
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                       @Nonnull final Interface ifc,
+                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        final String swIfName = ifc.getName();
+        final int swIfIndex = ifcContext.getIndex(swIfName, writeContext.getMappingContext());
+        checkArgument(ifc.getConfig() != null, "MPLS interface configuration missing");
+        final Boolean enabled = ifc.getConfig().isEnabled();
+        LOG.debug("Configuring MPLS on interface {}(id={}): enabled={}", swIfName, swIfIndex, enabled);
+
+        // The MPLS default table must also be explicitly created via the API before we enable it on interface
+        // If table already exists, request is ignored by VPP.
+        // In future, it might be useful to implement MPLS table management (HC2VPP-260).
+        createDefaultMplsTable(id);
+
+        // ietf-mpls does not define config node as mandatory child of MPLS interface list
+        setInterfaceMplsState(id, swIfName, swIfIndex, enabled);
+
+        LOG.debug("MPLS successfully configured on interface {}(id={})", swIfName, swIfIndex);
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                        @Nonnull final Interface dataBefore,
+                                        @Nonnull final Interface dataAfter, @Nonnull final WriteContext writeContext)
+        throws WriteFailedException {
+        writeCurrentAttributes(id, dataAfter, writeContext);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                        @Nonnull final Interface ifc,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        final String swIfName = ifc.getName();
+        final int swIfIndex = ifcContext.getIndex(swIfName, writeContext.getMappingContext());
+        LOG.debug("Disabling MPLS on interface {}(id={})", swIfName, swIfIndex);
+
+        // Map delete to MPLS disable regardless of previous MPLS config:
+        setInterfaceMplsState(id, swIfName, swIfIndex, false);
+
+        LOG.debug("MPLS successfully disabled on interface {}(id={})", swIfName, swIfIndex);
+    }
+
+    private void createDefaultMplsTable(@Nonnull final InstanceIdentifier<Interface> id) throws WriteFailedException {
+        final MplsTableAddDel request = new MplsTableAddDel();
+        // Map delete to MPLS disable regardless of previous MPLS config:
+        request.mtIsAdd = 1;
+        request.mtTableId = 0;
+        request.mtName = new byte[0];
+        LOG.trace("Creating default MPLS table", request);
+        getReplyForWrite(getFutureJVpp().mplsTableAddDel(request).toCompletableFuture(), id);
+
+    }
+
+    private void setInterfaceMplsState(@Nonnull final InstanceIdentifier<Interface> id, @Nonnull final String swIfName,
+                                       final int swIfIndex, final boolean enabled) throws WriteFailedException {
+        final SwInterfaceSetMplsEnable request = new SwInterfaceSetMplsEnable();
+        // Map delete to MPLS disable regardless of previous MPLS config:
+        request.enable = booleanToByte(enabled);
+        request.swIfIndex = swIfIndex;
+        LOG.trace("Updating MPLS flag for interface {}(id={}): {}", swIfName, swIfIndex, request);
+        getReplyForWrite(getFutureJVpp().swInterfaceSetMplsEnable(request).toCompletableFuture(), id);
+    }
+}
diff --git a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsModule.java b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsModule.java
new file mode 100644
index 000000000..4ada54ec1
--- /dev/null
+++ b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsModule.java
@@ -0,0 +1,40 @@
+/*
+ * 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.mpls;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.multibindings.Multibinder;
+import io.fd.honeycomb.translate.write.WriterFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public final class MplsModule extends AbstractModule {
+
+    private static final Logger LOG = LoggerFactory.getLogger(MplsModule.class);
+
+    @Override
+    protected void configure() {
+        LOG.info("Installing MPLS module");
+
+        LOG.info("Injecting MPLS writers");
+        final Multibinder<WriterFactory> writerFactoryBinder =
+            Multibinder.newSetBinder(binder(), WriterFactory.class);
+        writerFactoryBinder.addBinding().to(MplsWriterFactory.class);
+
+        LOG.info("MPLS module successfully configured");
+    }
+}
diff --git a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsWriterFactory.java b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsWriterFactory.java
new file mode 100644
index 000000000..7d420e029
--- /dev/null
+++ b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/MplsWriterFactory.java
@@ -0,0 +1,63 @@
+/*
+ * 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.mpls;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.inject.Inject;
+import com.google.inject.name.Named;
+import io.fd.hc2vpp.common.translate.util.NamingContext;
+import io.fd.honeycomb.translate.impl.write.GenericListWriter;
+import io.fd.honeycomb.translate.write.WriterFactory;
+import io.fd.honeycomb.translate.write.registry.ModifiableWriterRegistryBuilder;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+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.mpls.rev170702.Routing1;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls.rev170702.interfaces.mpls.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls.rev170702.routing.Mpls;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.rev140524.Routing;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+final class MplsWriterFactory implements WriterFactory {
+    private static final InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface>
+        IFC_ID =
+        InstanceIdentifier.create(Interfaces.class).child(
+            org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface.class);
+
+    private static final InstanceIdentifier<Routing> ROUTING_ID = InstanceIdentifier.create(Routing.class);
+    private static final InstanceIdentifier<Mpls> MPLS_ID = ROUTING_ID.augmentation(Routing1.class).child(Mpls.class);
+    private static final InstanceIdentifier<Interface> INTERFACE_ID = MPLS_ID.child(Interface.class);
+
+    @Inject
+    @Named("interface-context")
+    private NamingContext ifcContext;
+    @Inject
+    private FutureJVppCore vppApi;
+
+    @Override
+    public void init(@Nonnull final ModifiableWriterRegistryBuilder registry) {
+        // /ietf-routing:routing/ietf-mpls:mpls/interface
+        // after
+        // /ietf-interfaces:interfaces/interface
+        // First enable interface, then configure MPLS:
+        registry.subtreeAddAfter(
+            ImmutableSet.of(InstanceIdentifier.create(Interface.class).child(
+                org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls.rev170702.interfaces.mpls._interface.Config.class)),
+            new GenericListWriter<>(INTERFACE_ID, new MplsInterfaceCustomizer(vppApi, ifcContext)),
+            IFC_ID);
+    }
+}