1 files changed, 99 insertions, 0 deletions
diff --git a/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/Srv6Util.java b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/Srv6Util.java
new file mode 100644
index 000000000..ea308efcf
--- /dev/null
+++ b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/util/Srv6Util.java
@@ -0,0 +1,99 @@
+/*
+ * 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.util;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.translate.util.RWUtils;
+import io.fd.honeycomb.translate.write.WriteContext;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.DataplaneType;
+import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.policies.policies.Policy;
+import org.opendaylight.yang.gen.v1.urn.hc2vpp.params.xml.ns.yang.vpp.oc.srte.policy.rev180514.VppSrPolicyAugmentation;
+import org.opendaylight.yang.gen.v1.urn.hc2vpp.params.xml.ns.yang.vpp.oc.srte.policy.rev180514.segment.routing.traffic.engineering.policies.policy.VppSrPolicy;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public final class Srv6Util {
+
+    /**
+     * Constructs unique name for candidate path based on binding sid and weight
+     *
+     * @param bsid   binding sid associated with candidate path
+     * @param weight weight of actual sidList
+     * @return candidate path name
+     */
+    public static String getCandidatePathName(final Ipv6Address bsid, final long weight) {
+        return bsid.getValue() + "-" + weight;
+    }
+
+    /**
+     * Extracts BSID from policy, based on read/write operation it uses dataBefore/dataAfter while reading config
+     *
+     * @param instanceIdentifier identifier used to extract path of policy
+     * @param writeContext       used to store any useful information later utilized by customizers
+     * @param isWrite            condition whether this is a write or delete operation
+     * @return BSID in form of IPv6 address or null if not resolved
+     */
+    public static <T extends DataObject> Ipv6Address extractBsid(
+            final @Nonnull InstanceIdentifier<T> instanceIdentifier, final @Nonnull WriteContext writeContext,
+            boolean isWrite) {
+        Optional<Policy> policyOptional = isWrite
+                ? writeContext.readAfter(RWUtils.cutId(instanceIdentifier, Policy.class))
+                : writeContext.readBefore(RWUtils.cutId(instanceIdentifier, Policy.class));
+
+        if (policyOptional.isPresent() && policyOptional.get().getBindingSid() != null &&
+                policyOptional.get().getBindingSid().getConfig() != null) {
+            org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.binding.sid.properties.binding.sid.Config
+                    config = policyOptional.get().getBindingSid().getConfig();
+            if (config.getType() == DataplaneType.Srv6 && config.getValue() != null &&
+                    config.getValue().getIpAddress() != null &&
+                    config.getValue().getIpAddress().getIpv6Address() != null) {
+                return config.getValue().getIpAddress().getIpv6Address();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Extracts VRF FIB from Policy.
+     *
+     * @param instanceIdentifier identifier used to extract path of policy
+     * @param writeContext       used to store any useful information later utilized by customizers
+     * @param isWrite            condition whether this is a write or delete operation
+     * @return VRF FIB id when resolved, default VRF FIB (0) otherwise
+     */
+    public static <T extends DataObject> int extractVrfFib(final @Nonnull InstanceIdentifier<T> instanceIdentifier,
+                                                           final @Nonnull WriteContext writeContext, boolean isWrite) {
+        Optional<Policy> policyOptional = isWrite
+                ? writeContext.readAfter(RWUtils.cutId(instanceIdentifier, Policy.class))
+                : writeContext.readBefore(RWUtils.cutId(instanceIdentifier, Policy.class));
+
+        if (policyOptional.isPresent() && policyOptional.get().getAugmentation(VppSrPolicyAugmentation.class) != null &&
+                policyOptional.get().getAugmentation(VppSrPolicyAugmentation.class).getVppSrPolicy() != null) {
+
+            VppSrPolicy vppSrPolicy =
+                    policyOptional.get().getAugmentation(VppSrPolicyAugmentation.class).getVppSrPolicy();
+            if (vppSrPolicy.getConfig() != null && vppSrPolicy.getConfig().getTableId() != null) {
+                return vppSrPolicy.getConfig().getTableId().getValue().intValue();
+            }
+        }
+        // returning default Vrf Fib table
+        return 0;
+    }
+}