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 com.google.common.annotations.VisibleForTesting;
11 import com.google.common.collect.Multimap;
12 import io.netty.buffer.ByteBuf;
13 import io.netty.buffer.ByteBufUtil;
14 import io.netty.buffer.Unpooled;
15 import java.nio.charset.StandardCharsets;
16 import java.util.ArrayList;
17 import java.util.List;
18 import java.util.Map.Entry;
19 import org.opendaylight.protocol.bgp.linkstate.impl.attribute.sr.SrNodeAttributesParser;
20 import org.opendaylight.protocol.bgp.linkstate.spi.TlvUtil;
21 import org.opendaylight.protocol.util.BitArray;
22 import org.opendaylight.protocol.util.ByteArray;
23 import org.opendaylight.protocol.util.Ipv4Util;
24 import org.opendaylight.protocol.util.Ipv6Util;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Ipv4RouterIdentifier;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.Ipv6RouterIdentifier;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.IsisAreaIdentifier;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.NodeFlagBits;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.ProtocolId;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.TopologyIdentifier;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.LinkStateAttribute;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.NodeAttributesCase;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.NodeAttributesCaseBuilder;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.node.attributes._case.NodeAttributes;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.linkstate.path.attribute.link.state.attribute.node.attributes._case.NodeAttributesBuilder;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrAlgorithm;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev180329.node.state.SrCapabilities;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
42 public final class NodeAttributesParser {
44 private static final Logger LOG = LoggerFactory.getLogger(NodeAttributesParser.class);
45 private static final int FLAGS_SIZE = 8;
47 private static final int OVERLOAD_BIT = 0;
48 private static final int ATTACHED_BIT = 1;
49 private static final int EXTERNAL_BIT = 2;
50 private static final int ABBR_BIT = 3;
51 private static final int ROUTER_BIT = 4;
52 private static final int V6_BIT = 5;
53 /* Node Attribute TLVs */
54 private static final int NODE_FLAG_BITS = 1024;
55 private static final int NODE_OPAQUE = 1025;
56 private static final int DYNAMIC_HOSTNAME = 1026;
57 private static final int ISIS_AREA_IDENTIFIER = 1027;
58 /* Segment routing TLVs */
59 private static final int SR_CAPABILITIES = 1034;
60 private static final int SR_ALGORITHMS = 1035;
62 private NodeAttributesParser() {
67 * Parse Node Attributes.
69 * @param attributes key is the tlv type and value is the value of the tlv
70 * @param protocolId to differentiate parsing methods
71 * @return {@link LinkStateAttribute}
73 static LinkStateAttribute parseNodeAttributes(final Multimap<Integer, ByteBuf> attributes,
74 final ProtocolId protocolId) {
75 final List<TopologyIdentifier> topologyMembership = new ArrayList<>();
76 final List<IsisAreaIdentifier> areaMembership = new ArrayList<>();
77 final NodeAttributesBuilder builder = new NodeAttributesBuilder();
78 for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
79 final int key = entry.getKey();
80 final ByteBuf value = entry.getValue();
81 LOG.trace("Node attribute TLV {}", key);
83 case TlvUtil.MULTI_TOPOLOGY_ID:
84 parseTopologyId(topologyMembership, value);
87 parseNodeFlags(value, builder);
90 if (LOG.isDebugEnabled()) {
91 LOG.debug("Ignoring opaque value: {}.", ByteBufUtil.hexDump(value));
94 case DYNAMIC_HOSTNAME:
95 builder.setDynamicHostname(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
96 LOG.debug("Parsed Node Name {}", builder.getDynamicHostname());
98 case ISIS_AREA_IDENTIFIER:
99 final IsisAreaIdentifier ai = new IsisAreaIdentifier(ByteArray.readAllBytes(value));
100 areaMembership.add(ai);
101 LOG.debug("Parsed AreaIdentifier {}", ai);
103 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
104 final Ipv4RouterIdentifier ip4 = new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value));
105 builder.setIpv4RouterId(ip4);
106 LOG.debug("Parsed IPv4 Router Identifier {}", ip4);
108 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
109 final Ipv6RouterIdentifier ip6 = new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value));
110 builder.setIpv6RouterId(ip6);
111 LOG.debug("Parsed IPv6 Router Identifier {}", ip6);
113 case SR_CAPABILITIES:
114 final SrCapabilities caps = SrNodeAttributesParser.parseSrCapabilities(value, protocolId);
115 builder.setSrCapabilities(caps);
116 LOG.debug("Parsed SR Capabilities {}", caps);
119 final SrAlgorithm algs = SrNodeAttributesParser.parseSrAlgorithms(value);
120 builder.setSrAlgorithm(algs);
121 LOG.debug("Parsed SR Algorithms {}", algs);
124 LOG.warn("TLV {} is not a valid node attribute, ignoring it", key);
127 LOG.trace("Finished parsing Node Attributes.");
128 builder.setTopologyIdentifier(topologyMembership);
129 builder.setIsisAreaId(areaMembership);
130 return new NodeAttributesCaseBuilder().setNodeAttributes(builder.build()).build();
133 private static void parseNodeFlags(final ByteBuf value, final NodeAttributesBuilder builder) {
134 final BitArray flags = BitArray.valueOf(value, FLAGS_SIZE);
135 builder.setNodeFlags(new NodeFlagBits(flags.get(OVERLOAD_BIT), flags.get(ATTACHED_BIT), flags.get(EXTERNAL_BIT),
136 flags.get(ABBR_BIT), flags.get(ROUTER_BIT), flags.get(V6_BIT)));
137 LOG.debug("Parsed Overload bit: {}, attached bit: {}, external bit: {}, area border router: {}.",
138 flags.get(OVERLOAD_BIT), flags.get(ATTACHED_BIT), flags.get(EXTERNAL_BIT), flags.get(ABBR_BIT));
141 private static void parseTopologyId(final List<TopologyIdentifier> topologyMembership, final ByteBuf value) {
142 while (value.isReadable()) {
143 final TopologyIdentifier topId = new TopologyIdentifier(
144 value.readUnsignedShort() & TlvUtil.TOPOLOGY_ID_OFFSET);
145 topologyMembership.add(topId);
146 LOG.debug("Parsed Topology Identifier: {}", topId);
150 static void serializeNodeAttributes(final NodeAttributesCase nodeAttributesCase, final ByteBuf byteAggregator) {
151 LOG.trace("Started serializing Node Attributes");
152 final NodeAttributes nodeAttributes = nodeAttributesCase.getNodeAttributes();
153 serializeTopologyId(nodeAttributes.getTopologyIdentifier(), byteAggregator);
154 serializeNodeFlagBits(nodeAttributes.getNodeFlags(), byteAggregator);
155 if (nodeAttributes.getDynamicHostname() != null) {
156 TlvUtil.writeTLV(DYNAMIC_HOSTNAME, Unpooled.wrappedBuffer(StandardCharsets.UTF_8.encode(
157 nodeAttributes.getDynamicHostname())), byteAggregator);
159 final List<IsisAreaIdentifier> isisList = nodeAttributes.getIsisAreaId();
160 if (isisList != null) {
161 for (final IsisAreaIdentifier isisAreaIdentifier : isisList) {
162 TlvUtil.writeTLV(ISIS_AREA_IDENTIFIER, Unpooled.wrappedBuffer(isisAreaIdentifier.getValue()),
166 if (nodeAttributes.getIpv4RouterId() != null) {
167 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress(nodeAttributes.getIpv4RouterId()),
170 if (nodeAttributes.getIpv6RouterId() != null) {
171 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress(nodeAttributes.getIpv6RouterId()),
174 if (nodeAttributes.getSrCapabilities() != null) {
175 final ByteBuf capBuffer = Unpooled.buffer();
176 SrNodeAttributesParser.serializeSrCapabilities(nodeAttributes.getSrCapabilities(), capBuffer);
177 TlvUtil.writeTLV(SR_CAPABILITIES, capBuffer, byteAggregator);
179 if (nodeAttributes.getSrAlgorithm() != null) {
180 final ByteBuf capBuffer = Unpooled.buffer();
181 SrNodeAttributesParser.serializeSrAlgorithms(nodeAttributes.getSrAlgorithm(), capBuffer);
182 TlvUtil.writeTLV(SR_ALGORITHMS, capBuffer, byteAggregator);
184 LOG.trace("Finished serializing Node Attributes");
187 private static void serializeTopologyId(final List<TopologyIdentifier> topList, final ByteBuf byteAggregator) {
188 if (topList != null) {
189 final ByteBuf mpIdBuf = Unpooled.buffer();
190 for (final TopologyIdentifier topologyIdentifier : topList) {
191 mpIdBuf.writeShort(topologyIdentifier.getValue());
193 TlvUtil.writeTLV(TlvUtil.MULTI_TOPOLOGY_ID, mpIdBuf, byteAggregator);
197 private static void serializeNodeFlagBits(final NodeFlagBits nodeFlagBits, final ByteBuf byteAggregator) {
198 if (nodeFlagBits != null) {
199 final ByteBuf nodeFlagBuf = Unpooled.buffer(1);
200 final BitArray flags = new BitArray(FLAGS_SIZE);
201 flags.set(OVERLOAD_BIT, nodeFlagBits.isOverload());
202 flags.set(ATTACHED_BIT, nodeFlagBits.isAttached());
203 flags.set(EXTERNAL_BIT, nodeFlagBits.isExternal());
204 flags.set(ABBR_BIT, nodeFlagBits.isAbr());
205 flags.set(ROUTER_BIT, nodeFlagBits.isRouter());
206 flags.set(V6_BIT, nodeFlagBits.isV6());
207 flags.toByteBuf(nodeFlagBuf);
208 TlvUtil.writeTLV(NODE_FLAG_BITS, nodeFlagBuf, byteAggregator);