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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.write.policy.request;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import io.fd.hc2vpp.common.translate.util.AddressTranslator;
import io.fd.hc2vpp.srv6.util.JVppRequest;
import io.fd.hc2vpp.srv6.write.WriteRequest;
import io.fd.hc2vpp.srv6.write.policy.request.dto.SidList;
import io.fd.honeycomb.translate.write.WriteFailedException;
import io.fd.vpp.jvpp.core.dto.SrPolicyAdd;
import io.fd.vpp.jvpp.core.dto.SrPolicyMod;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import io.fd.vpp.jvpp.core.types.Srv6Sid;
import io.fd.vpp.jvpp.core.types.Srv6SidList;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.named.segment.lists.named.segment.lists.named.segment.list.Segments;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.named.segment.lists.named.segment.lists.named.segment.list.segments.Segment;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.oc.srte.policy.rev180514.SegmentRoutingPolicyBehavior;
import org.opendaylight.yang.gen.v1.http.fd.io.hc2vpp.yang.vpp.oc.srte.policy.rev180514.SegmentRoutingPolicyType;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PolicyWriteRequest extends JVppRequest implements WriteRequest {
/**
* Types of modification operations
*/
private static final int ADD_NEW = 1;
private static final int DELETE_EXISTING = 2;
private static final int MODIFY_WEIGHT = 3;
private static final Logger LOG = LoggerFactory.getLogger(PolicyWriteRequest.class);
/**
* Binding SID of the policy
*/
private Ipv6Address bindingSidAddress;
/**
* Behavior used by this policy. Either inserts to existing header or encapsulate to new one
*/
private SegmentRoutingPolicyBehavior policyBehavior;
/**
* Revelant if multiple segment lists are used. Default is load-balancing, spray will send traffic to every segment
*/
private SegmentRoutingPolicyType policyType;
/**
* FIB table where entry should be installed
*/
private int fibTableIndex;
/**
* List of SidList
*/
private List<SidList> segments;
public PolicyWriteRequest(final FutureJVppCore api) {
super(api);
}
private static Srv6Sid[] convertSegmentsToByteArray(final Segments segments) {
List<Srv6Sid> sidList = new ArrayList<>();
segments.getSegment().stream().sorted(Comparator.comparingLong(Segment::getIndex))
.map(segment -> segment.getConfig().getSidValue().getIpAddress().getIpv6Address())
.forEach(ipv6Address -> {
Srv6Sid sid = new Srv6Sid();
sid.addr = AddressTranslator.INSTANCE.ipv6AddressNoZoneToArray(ipv6Address);
sidList.add(sid);
});
return sidList.toArray(new Srv6Sid[0]);
}
@Override
public void write(final InstanceIdentifier<?> identifier) throws WriteFailedException {
checkValid();
final SrPolicyAdd createRequest = new SrPolicyAdd();
createRequest.bsidAddr = ipv6AddressNoZoneToArray(bindingSidAddress);
createRequest.isEncap = (byte) policyBehavior.getIntValue();
createRequest.type = (byte) policyType.getIntValue();
createRequest.fibTable = fibTableIndex;
SidList firstSidList = segments.get(0);
createRequest.sids = new Srv6SidList();
createRequest.sids.numSids = (byte) firstSidList.getNamedSegmentList().getSegments().getSegment().size();
createRequest.sids.sids = convertSegmentsToByteArray(firstSidList.getNamedSegmentList().getSegments());
createRequest.sids.weight = firstSidList.getWeight().intValue();
LOG.info("Writing policy {}", createRequest);
getReplyForWrite(getApi().srPolicyAdd(createRequest).toCompletableFuture(), identifier);
if (segments.size() > 1) {
LOG.info("Multiple segments detected for policy, modifying");
segments.stream()
.skip(1)
.map(policySegments -> {
SrPolicyMod modifyRequest = new SrPolicyMod();
modifyRequest.bsidAddr = createRequest.bsidAddr;
modifyRequest.operation = ADD_NEW;// add new segment list
modifyRequest.fibTable = fibTableIndex;
modifyRequest.sids = new Srv6SidList();
modifyRequest.sids.numSids =
(byte) policySegments.getNamedSegmentList().getSegments().getSegment().size();
modifyRequest.sids.sids =
convertSegmentsToByteArray(policySegments.getNamedSegmentList().getSegments());
modifyRequest.sids.weight = policySegments.getWeight().intValue();
return modifyRequest;
})
.peek(modifyRequest -> LOG.info("Adding additional segment list for policy {} / request {}",
bindingSidAddress.getValue(), modifyRequest))
.forEach(modifyRequest -> {
try {
getReplyForWrite(getApi().srPolicyMod(modifyRequest).toCompletableFuture(), identifier);
} catch (WriteFailedException e) {
throw new IllegalStateException(e);
}
});
}
}
@Override
public void checkValid() {
checkNotNull(bindingSidAddress, "Binding sid address not set");
checkNotNull(policyBehavior, "Policy behavior not set");
checkNotNull(policyType, "Policy type not set");
if (policyBehavior != SegmentRoutingPolicyBehavior.Encapsulation) {
checkNotNull(segments, "Segments not set");
checkState(!segments.isEmpty(), "No segments set");
}
}
public void setBindingSidAddress(
final Ipv6Address bindingSidAddress) {
this.bindingSidAddress = bindingSidAddress;
}
public void setPolicyBehavior(
final SegmentRoutingPolicyBehavior policyBehavior) {
this.policyBehavior = policyBehavior;
}
public void setPolicyType(
final SegmentRoutingPolicyType policyType) {
this.policyType = policyType;
}
public void setFibTableIndex(final int fibTableIndex) {
this.fibTableIndex = fibTableIndex;
}
public void setSegments(final List<SidList> segments) {
this.segments = segments;
}
}
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