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/*
* 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 {
private Srv6Util() {
throw new UnsupportedOperationException("Creating Srv6Util instance is not allowed.");
}
/**
* 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().augmentation(VppSrPolicyAugmentation.class) != null &&
policyOptional.get().augmentation(VppSrPolicyAugmentation.class).getVppSrPolicy() != null) {
VppSrPolicy vppSrPolicy =
policyOptional.get().augmentation(VppSrPolicyAugmentation.class).getVppSrPolicy();
if (vppSrPolicy.getConfig() != null && vppSrPolicy.getConfig().getTableId() != null) {
return vppSrPolicy.getConfig().getTableId().getValue().intValue();
}
}
// returning default Vrf Fib table
return 0;
}
}
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