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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.read.steering.request;
import com.google.common.base.Preconditions;
import io.fd.hc2vpp.srv6.read.ReadRequest;
import io.fd.honeycomb.translate.read.ReadContext;
import io.fd.honeycomb.translate.read.ReadFailedException;
import io.fd.vpp.jvpp.core.dto.SrSteeringPolDetails;
import io.fd.vpp.jvpp.core.future.FutureJVppCore;
import java.util.List;
import java.util.stream.Collectors;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.include.prefix.StateBuilder;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.prefixes.properties.Prefixes;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.prefixes.properties.prefixes.Prefix;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.prefixes.properties.prefixes.PrefixBuilder;
import org.opendaylight.yang.gen.v1.http.cisco.com.ns.yang.oc.srte.policy.rev170918.prefixes.properties.prefixes.PrefixKey;
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.Ipv6Prefix;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Request for steering of L3 traffic
*/
public class L3SteeringRequest extends SteeringRequest
implements ReadRequest<Prefix, PrefixKey, PrefixBuilder> {
private static final int L3_TRAFFIC_TYPE_IPV6 = 6;
private static final int L3_TRAFFIC_TYPE_IPV4 = 4;
public L3SteeringRequest(final FutureJVppCore api) {
super(api);
}
@Override
public void checkValid() {
super.checkValid();
}
@Override
@Nonnull
public List<PrefixKey> readAllKeys(@Nonnull InstanceIdentifier<Prefix> identifier, @Nonnull ReadContext ctx)
throws ReadFailedException {
return dumpManager.getDump(identifier, ctx.getModificationCache()).or(STATIC_EMPTY_REPLY)
.srSteeringPolDetails.stream()
.filter(
srSteeringPolDetails -> ((int) srSteeringPolDetails.trafficType) !=
L2SteeringRequest.L2_TRAFFIC_TYPE)
.map(this::parseL3SteeringKey)
.collect(Collectors.toList());
}
public List<IpPrefix> readAllIpPrefixes(@Nonnull InstanceIdentifier<Prefixes> identifier, @Nonnull ReadContext ctx)
throws ReadFailedException {
return dumpManager.getDump(identifier, ctx.getModificationCache()).or(STATIC_EMPTY_REPLY)
.srSteeringPolDetails.stream()
.filter(
srSteeringPolDetails -> ((int) srSteeringPolDetails.trafficType) !=
L2SteeringRequest.L2_TRAFFIC_TYPE)
.map(this::parseIpPrefix)
.collect(Collectors.toList());
}
@Override
public void readSpecific(@Nonnull InstanceIdentifier<Prefix> identifier, @Nonnull ReadContext ctx,
@Nonnull PrefixBuilder builder) throws ReadFailedException {
checkValid();
PrefixKey key = identifier.firstKeyOf(Prefix.class);
dumpManager.getDump(identifier, ctx.getModificationCache()).or(STATIC_EMPTY_REPLY)
.srSteeringPolDetails.stream()
.filter(
srSteeringPolDetails -> ((int) srSteeringPolDetails.trafficType) !=
L2SteeringRequest.L2_TRAFFIC_TYPE)
.filter(srSteeringPolDetails -> parseL3SteeringKey(srSteeringPolDetails).equals(key))
.findFirst()
.ifPresent(srSteeringPolDetails1 -> parseL3Steering(srSteeringPolDetails1, builder));
}
private void parseL3Steering(SrSteeringPolDetails srSteeringPolDetails, final PrefixBuilder builder) {
PrefixKey key = parseL3SteeringKey(srSteeringPolDetails);
builder.setKey(key).setIpPrefix(key.getIpPrefix())
.setState(new StateBuilder().setIpPrefix(key.getIpPrefix()).build());
}
private PrefixKey parseL3SteeringKey(SrSteeringPolDetails policyDetails) {
return new PrefixKey(parseIpPrefix(policyDetails));
}
private IpPrefix parseIpPrefix(final SrSteeringPolDetails policyDetails) {
boolean isIpv6 = isIpv6L3TrafficType(policyDetails.trafficType);
IpPrefix ipPrefix;
if (isIpv6) {
Ipv6Prefix ipv6Prefix = toIpv6Prefix(policyDetails.prefixAddr, policyDetails.maskWidth);
ipPrefix = new IpPrefix(ipv6Prefix);
} else {
Ipv4Prefix ipv4Prefix = toIpv4Prefix(policyDetails.prefixAddr, policyDetails.maskWidth);
ipPrefix = new IpPrefix(ipv4Prefix);
}
return ipPrefix;
}
private boolean isIpv6L3TrafficType(final byte trafficType) {
Preconditions.checkArgument(trafficType == L3_TRAFFIC_TYPE_IPV4 || trafficType == L3_TRAFFIC_TYPE_IPV6,
"Unsupported traffic type for L3 steering");
return trafficType == L3_TRAFFIC_TYPE_IPV6;
}
}
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