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/*
* Copyright (c) 2018 Cisco 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.mpls;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.EntropyLabelIndicator;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.ExtensionLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.GalLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.ImplicitNullLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.Ipv4ExplicitNullLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.Ipv6ExplicitNullLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.MplsLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.MplsLabelSpecialPurposeValue;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.OamAlertLabel;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.routing.types.rev171204.RouterAlertLabel;
/**
* Mixin that reads integer value of {@link MplsLabel}.
*/
interface MplsLabelReader {
default int getLabelValue(final MplsLabel label) {
if (label.getMplsLabelGeneralUse() != null) {
return label.getMplsLabelGeneralUse().getValue().intValue();
} else if (label.getMplsLabelSpecialPurpose() != null ) {
final Class<? extends MplsLabelSpecialPurposeValue> specialLabel =
label.getMplsLabelSpecialPurpose();
// Encoding of labels 0-3
// https://tools.ietf.org/html/rfc3032#section-2.1
if (Ipv4ExplicitNullLabel.class.equals(specialLabel)) {
return 0;
} else if (RouterAlertLabel.class.equals(specialLabel)) {
return 1;
} else if (Ipv6ExplicitNullLabel.class.equals(specialLabel)) {
return 2;
} else if (ImplicitNullLabel.class.equals(specialLabel)) {
return 3;
} else if (EntropyLabelIndicator.class.equals(specialLabel)) {
// https://tools.ietf.org/html/rfc6790#section-3
return 7;
} else if (GalLabel.class.equals(specialLabel)) {
// https://tools.ietf.org/html/rfc5586#section-4
return 13;
} else if (OamAlertLabel.class.equals(specialLabel)) {
// https://tools.ietf.org/html/rfc3429#section-3
return 14;
} else if (ExtensionLabel.class.equals(specialLabel)) {
// https://tools.ietf.org/html/rfc7274#section-3.1
return 15;
} else {
throw new IllegalArgumentException("Unsupported special purpose MPLS label: " + specialLabel);
}
} else {
throw new IllegalArgumentException("Unsupported MPLS label: " + label);
}
}
}
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