DHCP relay support (HC2VPP-71, HC2VPP-72)

Change-Id: Icea50f1444356c0c107dd31dfa47137c9866312e
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

3 files changed, 177 insertions, 0 deletions

diff --git a/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/DhcpModule.java b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/DhcpModule.java
new file mode 100644
index 000000000..09514df9b
--- /dev/null
+++ b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/DhcpModule.java
@@ -0,0 +1,44 @@
+/*
+ * 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;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.multibindings.Multibinder;
+import io.fd.hc2vpp.dhcp.write.DhcpWriterFactory;
+import io.fd.honeycomb.translate.write.WriterFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * DhcpModule class instantiating dhcp plugin components.
+ */
+public final class DhcpModule extends AbstractModule {
+
+    private static final Logger LOG = LoggerFactory.getLogger(DhcpModule.class);
+
+    @Override
+    protected void configure() {
+        LOG.info("Installing DHCP module");
+
+        LOG.info("Injecting writers factories");
+        // create writer factory binding
+        final Multibinder<WriterFactory> writerFactoryBinder = Multibinder.newSetBinder(binder(), WriterFactory.class);
+        writerFactoryBinder.addBinding().to(DhcpWriterFactory.class);
+
+        LOG.info("Module DHCP successfully configured");
+    }
+}
diff --git a/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpRelayCustomizer.java b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpRelayCustomizer.java
new file mode 100644
index 000000000..ca4e20b95
--- /dev/null
+++ b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpRelayCustomizer.java
@@ -0,0 +1,89 @@
+/*
+ * 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 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.DhcpProxyConfig2;
+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.inet.types.rev130715.IpAddressNoZone;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.Ipv6;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.dhcp.attributes.relays.Relay;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.dhcp.attributes.relays.RelayKey;
+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);
+        setRelay(id, dataAfter, writeContext, 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);
+        setRelay(id, dataAfter, writeContext, 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);
+        setRelay(id, dataBefore, writeContext, false);
+    }
+
+    private void setRelay(final InstanceIdentifier<Relay> id, final Relay relay, final WriteContext writeContext,
+                          final boolean isAdd) throws WriteFailedException {
+        final DhcpProxyConfig2 request = new DhcpProxyConfig2();
+        request.rxVrfId = relay.getRxVrfId().byteValue();
+        final boolean isIpv6 = Ipv6.class == relay.getAddressType();
+        request.isIpv6 = booleanToByte(isIpv6);
+        request.serverVrfId = relay.getServerVrfId().intValue();
+        request.isAdd = booleanToByte(isAdd);
+        request.insertCircuitId = booleanToByte(relay.isInsertCircuitId());
+        request.dhcpServer = parseAddress(relay.getServerAddress(), isIpv6);
+        request.dhcpSrcAddress = parseAddress(relay.getGatewayAddress(), isIpv6);
+        getReplyForWrite(getFutureJVpp().dhcpProxyConfig2(request).toCompletableFuture(), id);
+    }
+
+    private byte[] parseAddress(@Nonnull final IpAddressNoZone address, final boolean isIpv6) {
+        if (isIpv6) {
+            return ipv6AddressNoZoneToArray(address.getIpv6AddressNoZone());
+        } else {
+            return ipv4AddressNoZoneToArray(address.getIpv4AddressNoZone());
+        }
+    }
+}
diff --git a/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpWriterFactory.java b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpWriterFactory.java
new file mode 100644
index 000000000..93dc8048e
--- /dev/null
+++ b/dhcp/dhcp-impl/src/main/java/io/fd/hc2vpp/dhcp/write/DhcpWriterFactory.java
@@ -0,0 +1,44 @@
+/*
+ * 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 com.google.inject.Inject;
+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.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.Dhcp;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.dhcp.attributes.Relays;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.dhcp.rev170315.dhcp.attributes.relays.Relay;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Factory producing writers for DHCP plugin's data.
+ */
+public final class DhcpWriterFactory implements WriterFactory {
+
+    private static final InstanceIdentifier<Relay> RELAY_ID = InstanceIdentifier.create(Dhcp.class).child(Relays.class).child(Relay.class);
+
+    @Inject
+    private FutureJVppCore vppApi;
+
+    @Override
+    public void init(@Nonnull final ModifiableWriterRegistryBuilder registry) {
+        registry.add(new GenericListWriter<>(RELAY_ID, new DhcpRelayCustomizer(vppApi)));
+    }
+}