2 * Copyright (c) 2014 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.bgp.linkstate.impl.attribute;
10 import static org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.binding.sid.sub.tlvs.Ipv4PrefixSidParser.PREFIX_SID;
11 import static org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.binding.sid.sub.tlvs.Ipv6PrefixSidParser.IPV6_PREFIX_SID;
13 import com.google.common.annotations.VisibleForTesting;
14 import com.google.common.collect.ImmutableSet;
15 import com.google.common.collect.Multimap;
16 import io.netty.buffer.ByteBuf;
17 import io.netty.buffer.ByteBufUtil;
18 import io.netty.buffer.Unpooled;
19 import java.util.ArrayList;
20 import java.util.List;
21 import java.util.Map.Entry;
23 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.BindingSidLabelParser;
24 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.Ipv6SrPrefixAttributesParser;
25 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.RangeTlvParser;
26 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.SrPrefixAttributesParser;
27 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
28 import org.opendaylight.protocol.util.BitArray;
29 import org.opendaylight.protocol.util.ByteArray;
30 import org.opendaylight.protocol.util.Ipv4Util;
31 import org.opendaylight.protocol.util.Ipv6Util;
32 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.ExtendedRouteTag;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.IgpBits.UpDown;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.ProtocolId;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.RouteTag;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.LinkStateAttribute;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.PrefixAttributesCase;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.PrefixAttributesCaseBuilder;
40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.prefix.attributes._case.PrefixAttributes;
41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.linkstate.path.attribute.link.state.attribute.prefix.attributes._case.PrefixAttributesBuilder;
42 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.IgpBits;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.IgpBitsBuilder;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.Ipv6SrPrefix;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.SrBindingSidLabels;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.SrPrefix;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev200120.prefix.state.SrRange;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IgpMetric;
49 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
50 import org.slf4j.Logger;
51 import org.slf4j.LoggerFactory;
54 public final class PrefixAttributesParser {
56 /* Segment routing TLV */
57 public static final int BINDING_SID = 1160;
58 private static final Logger LOG = LoggerFactory.getLogger(PrefixAttributesParser.class);
59 private static final int ROUTE_TAG_LENGTH = 4;
60 private static final int EXTENDED_ROUTE_TAG_LENGTH = 8;
61 private static final int FLAGS_SIZE = 8;
62 private static final int UP_DOWN_BIT = 0;
63 private static final int OSPF_NO_UNICAST = 1;
64 private static final int OSPF_LOCAL_ADDRESS = 2;
65 private static final int OSPF_PROPAGATE_ADDRESS = 3;
66 /* Prefix Attribute TLVs */
67 private static final int IGP_FLAGS = 1152;
68 private static final int ROUTE_TAG = 1153;
69 private static final int EXTENDED_ROUTE_TAG = 1154;
70 private static final int PREFIX_METRIC = 1155;
71 private static final int FORWARDING_ADDRESS = 1156;
72 private static final int PREFIX_OPAQUE = 1157;
73 private static final int RANGE = 1159;
75 private PrefixAttributesParser() {
80 * Parse prefix attributes.
82 * @param attributes key is the tlv type and value are the value bytes of the tlv
83 * @param protocolId to differentiate parsing methods
84 * @return {@link LinkStateAttribute}
86 static LinkStateAttribute parsePrefixAttributes(final Multimap<Integer, ByteBuf> attributes,
87 final ProtocolId protocolId) {
88 final PrefixAttributesBuilder builder = new PrefixAttributesBuilder();
89 final List<RouteTag> routeTags = new ArrayList<>();
90 final List<ExtendedRouteTag> exRouteTags = new ArrayList<>();
91 for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
92 final int key = entry.getKey();
93 final ByteBuf value = entry.getValue();
94 LOG.trace("Prefix attribute TLV {}", key);
95 parseAttribute(key, value, protocolId, builder, routeTags, exRouteTags);
97 LOG.trace("Finished parsing Prefix Attributes.");
98 builder.setRouteTags(ImmutableSet.copyOf(routeTags));
99 builder.setExtendedTags(ImmutableSet.copyOf(exRouteTags));
100 return new PrefixAttributesCaseBuilder().setPrefixAttributes(builder.build()).build();
103 private static void parseAttribute(final int key, final ByteBuf value, final ProtocolId protocolId,
104 final PrefixAttributesBuilder builder, final List<RouteTag> routeTags,
105 final List<ExtendedRouteTag> exRouteTags) {
108 parseIgpFags(builder, value);
111 parseRouteTags(routeTags, value);
113 case EXTENDED_ROUTE_TAG:
114 parseExtendedRouteTags(exRouteTags, value);
117 final IgpMetric metric = new IgpMetric(ByteBufUtils.readUint32(value));
118 builder.setPrefixMetric(metric);
119 LOG.debug("Parsed Metric: {}", metric);
121 case FORWARDING_ADDRESS:
122 final IpAddressNoZone fwdAddress = parseForwardingAddress(value);
123 builder.setOspfForwardingAddress(fwdAddress);
124 LOG.debug("Parsed FWD Address: {}", fwdAddress);
127 if (LOG.isDebugEnabled()) {
128 LOG.debug("Parsed Opaque value: {}, not preserving it", ByteBufUtil.hexDump(value));
132 final SrPrefix prefix = SrPrefixAttributesParser.parseSrPrefix(value, protocolId);
133 builder.setSrPrefix(prefix);
134 LOG.debug("Parsed SR Prefix: {}", prefix);
136 case IPV6_PREFIX_SID:
137 final Ipv6SrPrefix ipv6Prefix = Ipv6SrPrefixAttributesParser.parseSrIpv6Prefix(value);
138 builder.setIpv6SrPrefix(ipv6Prefix);
139 LOG.debug("Parsed Ipv6 SR Prefix: {}", ipv6Prefix);
142 final SrRange range = RangeTlvParser.parseSrRange(value, protocolId);
143 builder.setSrRange(range);
144 LOG.debug("Parsed SR Range: {}", range);
147 parseBindingSid(builder, value, protocolId);
150 LOG.warn("TLV {} is not a valid prefix attribute, ignoring it", key);
154 private static void parseIgpFags(final PrefixAttributesBuilder builder, final ByteBuf value) {
155 final BitArray flags = BitArray.valueOf(value, FLAGS_SIZE);
156 final boolean upDownBit = flags.get(UP_DOWN_BIT);
157 builder.setIgpBits(new IgpBitsBuilder().setUpDown(new UpDown(upDownBit)).setIsIsUpDown(upDownBit)
158 .setOspfNoUnicast(flags.get(OSPF_NO_UNICAST))
159 .setOspfLocalAddress(flags.get(OSPF_LOCAL_ADDRESS))
160 .setOspfPropagateNssa(flags.get(OSPF_PROPAGATE_ADDRESS)).build());
161 LOG.debug("Parsed IGP flag (up/down bit) : {}", upDownBit);
164 private static void parseBindingSid(final PrefixAttributesBuilder builder, final ByteBuf value,
165 final ProtocolId protocolId) {
166 final List<SrBindingSidLabels> labels;
167 if (builder.getSrBindingSidLabels() != null) {
168 labels = builder.getSrBindingSidLabels();
170 labels = new ArrayList<>();
171 builder.setSrBindingSidLabels(labels);
173 final SrBindingSidLabels label = BindingSidLabelParser.parseBindingSidLabel(value, protocolId);
175 LOG.debug("Parsed SR Binding SID {}", label);
178 private static void parseRouteTags(final List<RouteTag> routeTags, final ByteBuf value) {
179 while (value.isReadable()) {
180 final RouteTag routeTag = new RouteTag(ByteArray.readBytes(value, ROUTE_TAG_LENGTH));
181 routeTags.add(routeTag);
182 LOG.debug("Parsed Route Tag: {}", routeTag);
186 private static void parseExtendedRouteTags(final List<ExtendedRouteTag> exRouteTags, final ByteBuf value) {
187 while (value.isReadable()) {
188 final ExtendedRouteTag exRouteTag = new ExtendedRouteTag(ByteArray.readBytes(value,
189 EXTENDED_ROUTE_TAG_LENGTH));
190 exRouteTags.add(exRouteTag);
191 LOG.debug("Parsed Extended Route Tag: {}", exRouteTag);
195 private static IpAddressNoZone parseForwardingAddress(final ByteBuf value) {
196 switch (value.readableBytes()) {
197 case Ipv4Util.IP4_LENGTH:
198 return new IpAddressNoZone(Ipv4Util.addressForByteBuf(value));
199 case Ipv6Util.IPV6_LENGTH:
200 return new IpAddressNoZone(Ipv6Util.addressForByteBuf(value));
202 LOG.debug("Ignoring unsupported forwarding address length {}", value.readableBytes());
207 static void serializePrefixAttributes(final PrefixAttributesCase prefixAttributesCase,
208 final ByteBuf byteAggregator) {
209 final PrefixAttributes prefixAtrributes = prefixAttributesCase.getPrefixAttributes();
210 if (prefixAtrributes.getIgpBits() != null) {
211 final BitArray igpBit = new BitArray(FLAGS_SIZE);
212 final IgpBits igpBits = prefixAtrributes.getIgpBits();
213 igpBit.set(UP_DOWN_BIT, igpBits.getUpDown().getUpDown() || igpBits.getIsIsUpDown());
214 igpBit.set(OSPF_NO_UNICAST, igpBits.getOspfNoUnicast());
215 igpBit.set(OSPF_LOCAL_ADDRESS, igpBits.getOspfLocalAddress());
216 igpBit.set(OSPF_PROPAGATE_ADDRESS, igpBits.getOspfPropagateNssa());
217 TlvUtil.writeTLV(IGP_FLAGS, Unpooled.wrappedBuffer(igpBit.array()), byteAggregator);
219 serializeRouteTags(prefixAtrributes.getRouteTags(), byteAggregator);
220 serializeExtendedRouteTags(prefixAtrributes.getExtendedTags(), byteAggregator);
221 serializePrefixMetric(prefixAtrributes.getPrefixMetric(), byteAggregator);
222 serializeForwardingAddress(prefixAtrributes.getOspfForwardingAddress(), byteAggregator);
223 serializeSrPrefix(prefixAtrributes.getSrPrefix(), byteAggregator);
224 serializeIpv6SrPrefix(prefixAtrributes.getIpv6SrPrefix(), byteAggregator);
225 serializeSrRange(prefixAtrributes.getSrRange(), byteAggregator);
226 serializeSrBindingLabel(prefixAtrributes.getSrBindingSidLabels(), byteAggregator);
229 private static void serializeSrBindingLabel(final List<SrBindingSidLabels> srBindingSidLabels,
230 final ByteBuf byteAggregator) {
231 if (srBindingSidLabels != null) {
232 for (final SrBindingSidLabels bindingSid : srBindingSidLabels) {
233 final ByteBuf sidBuffer = Unpooled.buffer();
234 BindingSidLabelParser.serializeBindingSidAttributes(bindingSid.getWeight(), bindingSid.getFlags(),
235 bindingSid.getBindingSubTlvs(), sidBuffer);
236 TlvUtil.writeTLV(PrefixAttributesParser.BINDING_SID, sidBuffer, byteAggregator);
241 private static void serializeSrRange(final SrRange srRange, final ByteBuf byteAggregator) {
242 if (srRange != null) {
243 final ByteBuf sidBuffer = Unpooled.buffer();
244 RangeTlvParser.serializeSrRange(srRange, sidBuffer);
245 TlvUtil.writeTLV(RANGE, sidBuffer, byteAggregator);
249 private static void serializeIpv6SrPrefix(final Ipv6SrPrefix ipv6SrPrefix, final ByteBuf byteAggregator) {
250 if (ipv6SrPrefix != null) {
251 final ByteBuf buffer = Unpooled.buffer();
252 Ipv6SrPrefixAttributesParser.serializeIpv6SrPrefix(ipv6SrPrefix, buffer);
253 TlvUtil.writeTLV(IPV6_PREFIX_SID, buffer, byteAggregator);
257 private static void serializeSrPrefix(final SrPrefix srPrefix, final ByteBuf byteAggregator) {
258 if (srPrefix != null) {
259 final ByteBuf buffer = Unpooled.buffer();
260 SrPrefixAttributesParser.serializeSrPrefix(srPrefix, buffer);
261 TlvUtil.writeTLV(PREFIX_SID, buffer, byteAggregator);
265 private static void serializePrefixMetric(final IgpMetric prefixMetric, final ByteBuf byteAggregator) {
266 if (prefixMetric != null) {
267 TlvUtil.writeTLV(PREFIX_METRIC, Unpooled.copyInt(prefixMetric.getValue().intValue()), byteAggregator);
271 private static void serializeRouteTags(final Set<RouteTag> routeTags, final ByteBuf byteAggregator) {
272 if (routeTags != null) {
273 final ByteBuf routeTagsBuf = Unpooled.buffer();
274 for (final RouteTag routeTag : routeTags) {
275 routeTagsBuf.writeBytes(routeTag.getValue());
277 TlvUtil.writeTLV(ROUTE_TAG, routeTagsBuf, byteAggregator);
281 private static void serializeExtendedRouteTags(final Set<ExtendedRouteTag> exRouteTags,
282 final ByteBuf byteAggregator) {
283 if (exRouteTags != null) {
284 final ByteBuf extendedBuf = Unpooled.buffer();
285 for (final ExtendedRouteTag exRouteTag : exRouteTags) {
286 extendedBuf.writeBytes(exRouteTag.getValue());
288 TlvUtil.writeTLV(EXTENDED_ROUTE_TAG, extendedBuf, byteAggregator);
292 private static void serializeForwardingAddress(final IpAddressNoZone forwardingAddress,
293 final ByteBuf byteAggregator) {
294 if (forwardingAddress != null) {
295 final ByteBuf ospfBuf = Unpooled.buffer();
296 if (forwardingAddress.getIpv4AddressNoZone() != null) {
297 ospfBuf.writeBytes(Ipv4Util.bytesForAddress(forwardingAddress.getIpv4AddressNoZone()));
298 } else if (forwardingAddress.getIpv6AddressNoZone() != null) {
299 ospfBuf.writeBytes(Ipv6Util.bytesForAddress(forwardingAddress.getIpv6AddressNoZone()));
301 TlvUtil.writeTLV(FORWARDING_ADDRESS, ospfBuf, byteAggregator);