HC2VPP-259: add support for ipv4 lookup

Change-Id: Ic6a2da08a8839bb42366b124737bb5243671815b
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

2 files changed, 97 insertions, 1 deletions

diff --git a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/Ipv4LookupWriter.java b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/Ipv4LookupWriter.java
new file mode 100644
index 000000000..7ac164a96
--- /dev/null
+++ b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/Ipv4LookupWriter.java
@@ -0,0 +1,92 @@
+/*
+ * 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 io.fd.honeycomb.translate.MappingContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.core.dto.MplsRouteAddDel;
+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._static.rev170310.StaticLspConfig;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp.Config;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.InSegment;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310._static.lsp_config.in.segment.type.MplsLabel;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.mpls._static.rev170310.routing.mpls._static.lsps.StaticLsp;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.mpls.rev171120.LookupType;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.mpls.rev171120.StaticLspVppLookupAugmentation;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * Translates {@link StaticLspConfig.Operation#PopAndLookup} operation with {@link LookupType#Ipv4} to
+ * mpls_route_add_del API.
+ *
+ * @see <a href="https://git.fd.io/vpp/tree/src/vnet/mpls/mpls.api">mpls_route_add_del</a> definition
+ */
+final class Ipv4LookupWriter implements LspWriter {
+    private static final byte IPV4_PROTOCOL = (byte) LookupType.Ipv4.getIntValue();
+
+    private final FutureJVppCore vppApi;
+
+    Ipv4LookupWriter(@Nonnull final FutureJVppCore vppApi) {
+        this.vppApi = vppApi;
+    }
+
+    @Override
+    public void write(@Nonnull final InstanceIdentifier<StaticLsp> id, @Nonnull final StaticLsp data,
+                      @Nonnull final MappingContext ctx, final boolean isAdd) throws WriteFailedException {
+        final Config config = data.getConfig();
+        final MplsRouteAddDel request = new MplsRouteAddDel();
+
+        request.mrIsAdd = booleanToByte(isAdd);
+
+        translate(request, config);
+        translate(request, config.getAugmentation(StaticLspVppLookupAugmentation.class));
+
+        // default values based on inspecting VPP's CLI and make test code
+        request.mrClassifyTableIndex = -1;
+        request.mrNextHopProto = IPV4_PROTOCOL;
+        request.mrNextHopWeight = 1;
+        request.mrNextHop = new byte[0]; // no next hop since we POP
+        request.mrNextHopOutLabelStack = new int[0]; // no new labels
+        request.mrNextHopSwIfIndex = -1;
+        request.mrNextHopViaLabel = MPLS_LABEL_INVALID;
+
+        getReplyForWrite(vppApi.mplsRouteAddDel(request).toCompletableFuture(), id);
+    }
+
+    private void translate(@Nonnull final MplsRouteAddDel request, @Nonnull final Config config) {
+        final InSegment inSegment = config.getInSegment();
+        checkArgument(inSegment != null, "Configuring ipv4 pop-and-lookup, but in-segment is missing.");
+
+        checkArgument(inSegment.getType() instanceof MplsLabel, "Expecting mpls-label in-segment type, but %s given.",
+            inSegment.getType());
+        final Long label = ((MplsLabel) inSegment.getType()).getIncomingLabel().getValue();
+        request.mrLabel = label.intValue();
+    }
+
+    private void translate(@Nonnull final MplsRouteAddDel request,
+                           @Nonnull final StaticLspVppLookupAugmentation vppLabelLookup) {
+        // IPv4 lookup should only happen if there is no more labels to process, so setting the EOS bit:
+        request.mrEos = 1;
+        final Long lookupInTable = vppLabelLookup.getLabelLookup().getIp4LookupInTable();
+        checkArgument(lookupInTable != null,
+            "Configuring pop and ipv4 lookup, but ipv4 lookup table was not given");
+        request.mrNextHopTableId = lookupInTable.intValue();
+    }
+}
diff --git a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/StaticLspCustomizer.java b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/StaticLspCustomizer.java
index b9e48cd60..54653b9c1 100644
--- a/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/StaticLspCustomizer.java
+++ b/mpls/impl/src/main/java/io/fd/hc2vpp/mpls/StaticLspCustomizer.java
@@ -46,12 +46,14 @@ final class StaticLspCustomizer implements ListWriterCustomizer<StaticLsp, Stati
     private static final Logger LOG = LoggerFactory.getLogger(StaticLspCustomizer.class);
     private final ImposeAndForwardWriter imposeAndForward;
     private final MplsLookupWriter mplsLookup;
+    private final Ipv4LookupWriter ipv4Lookup;
 
     StaticLspCustomizer(@Nonnull final FutureJVppCore vppApi, @Nonnull NamingContext interfaceContext) {
         checkNotNull(vppApi, "vppApi should not be null");
         checkNotNull(interfaceContext, "interfaceContext should not be null");
         this.imposeAndForward = new ImposeAndForwardWriter(vppApi, interfaceContext);
         this.mplsLookup = new MplsLookupWriter(vppApi);
+        this.ipv4Lookup = new Ipv4LookupWriter(vppApi);
     }
 
     @Override
@@ -85,7 +87,9 @@ final class StaticLspCustomizer implements ListWriterCustomizer<StaticLsp, Stati
             checkArgument(vppAttributes != null && vppAttributes.getLabelLookup() != null,
                 "Configuring pop-and-lookup operation but label-lookup leaf is missing");
             final LookupType type = vppAttributes.getLabelLookup().getType();
-            if (LookupType.Mpls.equals(type)) {
+            if (LookupType.Ipv4.equals(type)) {
+                ipv4Lookup.write(id, data, ctx, isAdd);
+            } else if (LookupType.Mpls.equals(type)) {
                 mplsLookup.write(id, data, ctx, isAdd);
             } else {
                 throw new IllegalArgumentException("Unsupported lookup type: " + type);