HC2VPP-304 - add SRv6 policy module

new models:
- hc2vpp-oc-srte-policy@2017-09-18.yang
  (ietf draft for srte-policies)
- vpp-oc-srte-policy@2018-05-14.yang
  (augments oc-srte-policy model with VPP specific configuration)
- policy-context@2018-06-07.yang
  defines policy contexts for policies and candidate paths

new features:
- adds support for writing/reading SRv6 policies
- adds support for writing/reading L2 steering
- adds support for writing/reading L3 steering
- implements support for FIB table management (HC2VPP-345)

Change-Id: Ie83ac8ecdcc0e46086e1ecdaecbb811746151c2f
Signed-off-by: Michal Cmarada <michal.cmarada@pantheon.tech>

1 files changed, 91 insertions, 0 deletions

diff --git a/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/steering/PrefixesConfigCustomizer.java b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/steering/PrefixesConfigCustomizer.java
new file mode 100644
index 000000000..e366db3a3
--- /dev/null
+++ b/srv6/srv6-impl/src/main/java/io/fd/hc2vpp/srv6/write/steering/PrefixesConfigCustomizer.java
@@ -0,0 +1,91 @@
+/*
+ * 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.steering;
+
+import io.fd.hc2vpp.common.translate.util.FutureJVppCustomizer;
+import io.fd.hc2vpp.srv6.util.Srv6Util;
+import io.fd.hc2vpp.srv6.write.steering.request.L3SteeringRequest;
+import io.fd.honeycomb.translate.spi.write.WriterCustomizer;
+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.http.cisco.com.ns.yang.oc.srte.policy.rev170918.prefixes.properties.prefixes.Config;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
+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.inet.types.rev130715.Ipv6Prefix;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class PrefixesConfigCustomizer extends FutureJVppCustomizer implements WriterCustomizer<Config> {
+
+    private static final IpPrefix
+            DEFAULT_IPV6_PREFIX = new IpPrefix(new Ipv6Prefix("::/0"));
+    private static final IpPrefix
+            DEFAULT_IPV4_PREFIX = new IpPrefix(new Ipv4Prefix("0.0.0.0/0"));
+
+    public PrefixesConfigCustomizer(@Nonnull final FutureJVppCore futureJVppCore) {
+        super(futureJVppCore);
+    }
+
+    private void writePrefixes(final @Nonnull InstanceIdentifier<Config> instanceIdentifier,
+                               final @Nonnull Config config, final @Nonnull WriteContext writeContext,
+                               final boolean isWrite)
+            throws WriteFailedException {
+        Ipv6Address bsid = Srv6Util.extractBsid(instanceIdentifier, writeContext, isWrite);
+        int vrfFib = Srv6Util.extractVrfFib(instanceIdentifier, writeContext, isWrite);
+
+        if (bsid == null) {
+            throw new WriteFailedException.CreateFailedException(instanceIdentifier, config,
+                    new Throwable("Failed to extract BSID from policy for prefix"));
+        }
+        if (config.isPrefixesAll()) {
+            // forward all traffic to policy
+            writeL3Steering(vrfFib, instanceIdentifier, DEFAULT_IPV6_PREFIX, bsid, getFutureJVpp(), isWrite);
+            writeL3Steering(vrfFib, instanceIdentifier, DEFAULT_IPV4_PREFIX, bsid, getFutureJVpp(), isWrite);
+        }
+    }
+
+    private void writeL3Steering(int vrfFib, InstanceIdentifier instanceIdentifier, IpPrefix ipPrefix,
+                                 final Ipv6Address bsid, FutureJVppCore api, boolean isWrite)
+            throws WriteFailedException {
+        L3SteeringRequest request = new L3SteeringRequest(api);
+        request.setBindingSid(bsid);
+        request.setPrefix(ipPrefix);
+        request.setFibTableIndex(vrfFib);
+        if (isWrite) {
+            request.write(instanceIdentifier);
+        } else {
+            request.delete(instanceIdentifier);
+        }
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Config> instanceIdentifier,
+                                       @Nonnull final Config config,
+                                       @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        writePrefixes(instanceIdentifier, config, writeContext, true);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Config> instanceIdentifier,
+                                        @Nonnull final Config config,
+                                        @Nonnull final WriteContext writeContext) throws WriteFailedException {
+        writePrefixes(instanceIdentifier, config, writeContext, false);
+    }
+}