1 files changed, 136 insertions, 0 deletions
diff --git a/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/sid/SidCustomizer.java b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/sid/SidCustomizer.java
new file mode 100644
index 000000000..c63205699
--- /dev/null
+++ b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/sid/SidCustomizer.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2018 Bell Canada, Pantheon Technologies 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.srv6.write.sid;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.googlecode.ipv6.IPv6NetworkMask;
+import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
+import io.fd.hc2vpp.fib.management.FibManagementIIds;
+import io.fd.hc2vpp.srv6.util.function.LocalSidFunctionWriteBindingRegistry;
+import io.fd.hc2vpp.srv6.write.sid.request.LocalSidFunctionRequest;
+import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.util.RWUtils;
+import io.fd.honeycomb.translate.write.WriteContext;
+import io.fd.honeycomb.translate.write.WriteFailedException;
+import io.fd.vpp.jvpp.core.future.FutureJVppCore;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.hc2vpp.params.xml.ns.yang.vpp.ietf.srv6.base.rev180613.VppSrv6FibLocatorAugment;
+import org.opendaylight.yang.gen.v1.urn.hc2vpp.params.xml.ns.yang.vpp.ietf.srv6.base.rev180613.vpp.srv6.fib.FibTable;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.srv6._static.rev180301.srv6._static.cfg.Sid;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.srv6._static.rev180301.srv6._static.cfg.SidKey;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.srv6.base.rev180301.srv6.locators.locators.Locator;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.srv6.base.rev180301.srv6.locators.locators.locator.Prefix;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.vpp.fib.table.management.fib.tables.Table;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.vpp.fib.table.management.rev180521.vpp.fib.table.management.fib.tables.TableKey;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
+
+public class SidCustomizer extends FutureJVppCustomizer implements ListWriterCustomizer<Sid, SidKey> {
+
+    private final LocalSidFunctionWriteBindingRegistry bindingRegistry;
+
+    public SidCustomizer(@Nonnull final FutureJVppCore futureJVppCore,
+                         @Nonnull final LocalSidFunctionWriteBindingRegistry bindingRegistry) {
+        super(futureJVppCore);
+        this.bindingRegistry = bindingRegistry;
+    }
+
+    Ipv6Address resolveSidAddress(@Nonnull final Prefix locPrefix, @Nonnull Sid localSid) {
+        com.googlecode.ipv6.IPv6Address ip =
+                com.googlecode.ipv6.IPv6Address.fromString(locPrefix.getAddress().getValue());
+        IPv6NetworkMask mask = IPv6NetworkMask.fromPrefixLength(locPrefix.getLength().getValue());
+        // strip function part if present
+        ip = ip.maskWithNetworkMask(mask);
+        //add new function part based on opcode
+        String locIp = ip.add(localSid.getOpcode().getValue().intValue()).toString();
+        return new Ipv6Address(locIp);
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Sid> instanceIdentifier,
+                                       @Nonnull final Sid localSid, @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        InstanceIdentifier<Locator> locatorIid = RWUtils.cutId(instanceIdentifier, Locator.class);
+        Optional<Locator> locatorOpt = writeContext.readAfter(locatorIid);
+        Table vrfTable = getVrfTable(instanceIdentifier, writeContext, locatorIid, locatorOpt);
+        LocalSidFunctionRequest request = bindRequest(extractLocPrefix(instanceIdentifier, locatorOpt, localSid),
+                localSid, vrfTable.getTableId().getValue().intValue(), writeContext);
+        if (request == null) {
+            throw new WriteFailedException(instanceIdentifier,
+                    String.format("Cannot create write request for %s", localSid));
+        }
+        request.write(instanceIdentifier);
+    }
+
+    private Table getVrfTable(final @Nonnull InstanceIdentifier<Sid> iid, final @Nonnull WriteContext writeContext,
+                              final InstanceIdentifier<Locator> locatorIid, final Optional<Locator> locatorOpt) {
+        Preconditions.checkArgument(locatorOpt.isPresent(), "Locator: {} for SID: {} was not found.", locatorIid, iid);
+        Preconditions.checkNotNull(locatorOpt.get().getAugmentation(VppSrv6FibLocatorAugment.class),
+                "Vpp FIB table augmentation was not found for SID: {}.", iid);
+        FibTable fibTable = locatorOpt.get().getAugmentation(VppSrv6FibLocatorAugment.class).getFibTable();
+        Preconditions.checkNotNull(fibTable, "Vpp FIB table configuration was not found for SID: {}.", iid);
+        TableKey tableKey = new TableKey(fibTable.getAddressFamily(), fibTable.getTableId());
+        KeyedInstanceIdentifier<Table, TableKey> vrfIid = FibManagementIIds.FM_FIB_TABLES.child(Table.class, tableKey);
+        if (!writeContext.readAfter(vrfIid).isPresent()) {
+            throw new IllegalArgumentException(
+                    String.format("VRF table: %s not found. Create table before writing SID : %s.", tableKey, iid));
+        }
+        return writeContext.readAfter(vrfIid).get();
+    }
+
+    private Prefix extractLocPrefix(final @Nonnull InstanceIdentifier<Sid> instanceIdentifier,
+                                    Optional<Locator> locatorOpt, final @Nonnull Sid localSid)
+            throws WriteFailedException {
+        Preconditions.checkArgument(locatorOpt.isPresent(), "Cannot read locator for sid: {}, with IId: ", localSid,
+                instanceIdentifier);
+        Locator loc = locatorOpt.get();
+        if (loc.getPrefix() == null || loc.getPrefix() == null || loc.getPrefix().getAddress() == null ||
+                loc.getPrefix().getLength() == null) {
+            throw new WriteFailedException(instanceIdentifier,
+                    String.format("Cannot parse locator prefix for local sid %s", localSid));
+        }
+        return loc.getPrefix();
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Sid> instanceIdentifier,
+                                        @Nonnull final Sid localSid, @Nonnull final WriteContext writeContext)
+            throws WriteFailedException {
+        InstanceIdentifier<Locator> locatorIid = RWUtils.cutId(instanceIdentifier, Locator.class);
+        Optional<Locator> locatorOpt = writeContext.readBefore(locatorIid);
+        Table vrfTable = getVrfTable(instanceIdentifier, writeContext, locatorIid, locatorOpt);
+        LocalSidFunctionRequest request = bindRequest(extractLocPrefix(instanceIdentifier, locatorOpt, localSid),
+                localSid, vrfTable.getTableId().getValue().intValue(), writeContext);
+
+        if (request == null) {
+            throw new WriteFailedException(instanceIdentifier,
+                    String.format("Cannot create delete request for %s", localSid));
+        }
+        request.delete(instanceIdentifier);
+    }
+
+    private LocalSidFunctionRequest bindRequest(final @Nonnull Prefix locPrefix, final @Nonnull Sid localSid,
+                                                final int installFibId, final @Nonnull WriteContext writeContext) {
+        LocalSidFunctionRequest request = bindingRegistry.bind(localSid, writeContext);
+        Ipv6Address sidAddress = resolveSidAddress(locPrefix, localSid);
+        request.setLocalSidAddress(sidAddress);
+        request.setInstallFibTable(installFibId);
+        return request;
+    }
+}