2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.pcep.ietf.stateful07;
10 import com.google.common.base.Preconditions;
11 import com.google.common.collect.ImmutableMap;
12 import com.google.common.collect.ImmutableMap.Builder;
13 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.Unpooled;
17 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
18 import org.opendaylight.protocol.pcep.spi.TlvParser;
19 import org.opendaylight.protocol.pcep.spi.TlvSerializer;
20 import org.opendaylight.protocol.pcep.spi.TlvUtil;
21 import org.opendaylight.protocol.util.ByteBufWriteUtil;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.PathBinding;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.PathBindingBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.path.binding.BindingTypeValue;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.path.binding.binding.type.value.MplsLabel;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.path.binding.binding.type.value.MplsLabelBuilder;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.path.binding.binding.type.value.MplsLabelEntry;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.path.binding.tlv.path.binding.binding.type.value.MplsLabelEntryBuilder;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Tlv;
30 import org.opendaylight.yangtools.concepts.IllegalArgumentCodec;
31 import org.opendaylight.yangtools.yang.common.Uint16;
32 import org.opendaylight.yangtools.yang.common.Uint32;
33 import org.opendaylight.yangtools.yang.common.Uint8;
36 * Parser for {@link PathBinding}.
38 public final class PathBindingTlvParser implements TlvParser, TlvSerializer {
40 // TODO: to be confirmed by IANA
41 public static final int TYPE = 31;
43 private static final int MPLS_LABEL = 0;
44 private static final int MPLS_STACK_ENTRY = 1;
46 private static final int LABEL_MASK = 0xfffff;
47 private static final int TC_MASK = 0x7;
48 private static final int S_MASK = 0x1;
49 private static final int TTL_MASK = 0xff;
50 private static final int LABEL_SHIFT = 12;
51 private static final int TC_SHIFT = LABEL_SHIFT - 3;
52 private static final int S_SHIFT = TC_SHIFT - 1;
53 private static final int MPLS_ENTRY_LENGTH = 4;
54 private static final int MPLS_BINDING_LENGTH = MPLS_ENTRY_LENGTH + 2;
56 private static final Map<Integer, PathBindingTlvCodec> BT_PARSERS;
57 private static final Map<Class<? extends BindingTypeValue>, PathBindingTlvCodec> BT_SERIALIZERS;
60 final MplsLabelCodec mplsLabelCodec = new MplsLabelCodec();
61 final MplsLabelEntryCodec mplsLabelEntryCodec = new MplsLabelEntryCodec();
62 final Builder<Integer, PathBindingTlvCodec> parsers = ImmutableMap.builder();
63 final Builder<Class<? extends BindingTypeValue>, PathBindingTlvCodec> serializers =
64 ImmutableMap.builder();
66 parsers.put(mplsLabelCodec.getBindingType(), mplsLabelCodec);
67 serializers.put(MplsLabel.class, mplsLabelCodec);
69 parsers.put(mplsLabelEntryCodec.getBindingType(), mplsLabelEntryCodec);
70 serializers.put(MplsLabelEntry.class, mplsLabelEntryCodec);
72 BT_PARSERS = parsers.build();
73 BT_SERIALIZERS = serializers.build();
77 public void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
78 Preconditions.checkArgument(tlv instanceof PathBinding,
79 "The TLV must be PathBinding type, but was %s", tlv.getClass());
80 final PathBinding pTlv = (PathBinding) tlv;
81 final BindingTypeValue bindingTypeValue = pTlv.getBindingTypeValue();
82 Preconditions.checkArgument(bindingTypeValue != null,
83 "Missing Binding Value in Path Bidning TLV: %s", pTlv);
84 final ByteBuf body = Unpooled.buffer(MPLS_BINDING_LENGTH);
85 final PathBindingTlvCodec codec = BT_SERIALIZERS.get(bindingTypeValue.implementedInterface());
86 Preconditions.checkArgument(codec != null,
87 "Unsupported Path Binding Type: %s", bindingTypeValue.implementedInterface());
88 ByteBufWriteUtil.writeUnsignedShort(Uint16.valueOf(codec.getBindingType()), body);
89 body.writeBytes(codec.serialize(bindingTypeValue));
91 TlvUtil.formatTlv(TYPE, body, buffer);
95 public Tlv parseTlv(final ByteBuf buffer) throws PCEPDeserializerException {
99 final int type = buffer.readUnsignedShort();
100 final PathBindingTlvCodec codec = BT_PARSERS.get(type);
102 throw new PCEPDeserializerException("Unsupported Path Binding Type: " + type);
104 return new PathBindingBuilder().setBindingTypeValue(codec.deserialize(buffer)).build();
107 private static final class MplsLabelCodec implements PathBindingTlvCodec {
110 public ByteBuf serialize(final BindingTypeValue bindingValue) {
111 Preconditions.checkArgument(bindingValue instanceof MplsLabel, "bindingValue is not MplsLabel");
112 final MplsLabel mplsLabel = (MplsLabel) bindingValue;
113 final ByteBuf value = Unpooled.buffer(MPLS_ENTRY_LENGTH);
114 ByteBufWriteUtil.writeUnsignedInt(Uint32.valueOf(getMplsStackEntry(mplsLabel.getMplsLabel())), value);
119 public BindingTypeValue deserialize(final ByteBuf buffer) {
120 final MplsLabelBuilder builder = new MplsLabelBuilder();
121 builder.setMplsLabel(getMplsLabel(buffer.readUnsignedInt()));
122 return builder.build();
126 public int getBindingType() {
131 private static final class MplsLabelEntryCodec implements PathBindingTlvCodec {
134 public ByteBuf serialize(final BindingTypeValue bindingValue) {
135 Preconditions.checkArgument(bindingValue instanceof MplsLabelEntry,
136 "bindingValue is not MplsLabelEntry");
137 final MplsLabelEntry mplsEntry = (MplsLabelEntry) bindingValue;
138 final ByteBuf value = Unpooled.buffer(MPLS_ENTRY_LENGTH);
139 final long entry = getMplsStackEntry(mplsEntry.getLabel())
140 | mplsEntry.getTrafficClass().toJava() << TC_SHIFT
141 | (mplsEntry.isBottomOfStack() ? 1 : 0) << S_SHIFT
142 | mplsEntry.getTimeToLive().toJava();
143 ByteBufWriteUtil.writeUnsignedInt(Uint32.valueOf(entry), value);
148 public BindingTypeValue deserialize(final ByteBuf buffer) {
149 final long entry = buffer.readUnsignedInt();
150 final MplsLabelEntryBuilder builder = new MplsLabelEntryBuilder()
151 .setLabel(getMplsLabel(entry))
152 .setTrafficClass(Uint8.valueOf(entry >> TC_SHIFT & TC_MASK))
153 .setBottomOfStack((entry >> S_SHIFT & S_MASK) == 1)
154 .setTimeToLive(Uint8.valueOf(entry & TTL_MASK));
155 return builder.build();
159 public int getBindingType() {
160 return MPLS_STACK_ENTRY;
164 private interface PathBindingTlvCodec extends IllegalArgumentCodec<ByteBuf, BindingTypeValue> {
165 int getBindingType();
168 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
169 justification = "https://github.com/spotbugs/spotbugs/issues/811")
170 private static org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.MplsLabel
171 getMplsLabel(final long mplsStackEntry) {
172 return new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125
173 .MplsLabel(Uint32.valueOf(mplsStackEntry >> LABEL_SHIFT & LABEL_MASK));
176 @SuppressFBWarnings(value = "UPM_UNCALLED_PRIVATE_METHOD",
177 justification = "https://github.com/spotbugs/spotbugs/issues/811")
178 private static long getMplsStackEntry(final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network
179 .concepts.rev131125.MplsLabel mplsLabel) {
180 return mplsLabel.getValue().toJava() << LABEL_SHIFT;