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.attribute;
10 import com.google.common.annotations.VisibleForTesting;
11 import com.google.common.base.Charsets;
12 import com.google.common.collect.Multimap;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.ByteBufUtil;
15 import io.netty.buffer.Unpooled;
16 import java.util.ArrayList;
17 import java.util.List;
18 import java.util.Map.Entry;
19 import org.opendaylight.protocol.bgp.linkstate.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.rev150210.Ipv4RouterIdentifier;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.Ipv6RouterIdentifier;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.IsisAreaIdentifier;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.NodeFlagBits;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.TopologyIdentifier;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.LinkStateAttribute;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.NodeAttributesCase;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.NodeAttributesCaseBuilder;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.node.attributes._case.NodeAttributes;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.linkstate.path.attribute.link.state.attribute.node.attributes._case.NodeAttributesBuilder;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.state.SrAlgorithm;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.state.SrCapabilities;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
41 public final class NodeAttributesParser {
43 private static final Logger LOG = LoggerFactory.getLogger(NodeAttributesParser.class);
45 private NodeAttributesParser() {
46 throw new UnsupportedOperationException();
49 private static final int FLAGS_SIZE = 8;
52 private static final int OVERLOAD_BIT = 0;
53 private static final int ATTACHED_BIT = 1;
54 private static final int EXTERNAL_BIT = 2;
55 private static final int ABBR_BIT = 3;
56 private static final int ROUTER_BIT = 4;
57 private static final int V6_BIT = 5;
59 /* Node Attribute TLVs */
60 private static final int NODE_FLAG_BITS = 1024;
61 private static final int NODE_OPAQUE = 1025;
62 private static final int DYNAMIC_HOSTNAME = 1026;
63 private static final int ISIS_AREA_IDENTIFIER = 1027;
65 /* Segment routing TLVs */
66 private static final int SR_CAPABILITIES = 1034;
67 private static final int SR_ALGORITHMS = 1035;
70 * Parse Node Attributes.
72 * @param attributes key is the tlv type and value is the value of the tlv
73 * @return {@link LinkStateAttribute}
75 static LinkStateAttribute parseNodeAttributes(final Multimap<Integer, ByteBuf> attributes) {
76 final List<TopologyIdentifier> topologyMembership = new ArrayList<>();
77 final List<IsisAreaIdentifier> areaMembership = new ArrayList<>();
78 final NodeAttributesBuilder builder = new NodeAttributesBuilder();
79 for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
80 final int key = entry.getKey();
81 final ByteBuf value = entry.getValue();
82 LOG.trace("Node attribute TLV {}", key);
84 case TlvUtil.MULTI_TOPOLOGY_ID:
85 parseTopologyId(topologyMembership, value);
88 final BitArray flags = BitArray.valueOf(value, FLAGS_SIZE);
89 builder.setNodeFlags(new NodeFlagBits(flags.get(OVERLOAD_BIT), flags.get(ATTACHED_BIT), flags.get
90 (EXTERNAL_BIT), flags.get(ABBR_BIT), flags.get(ROUTER_BIT), flags.get(V6_BIT)));
91 LOG.debug("Parsed Overload bit: {}, attached bit: {}, external bit: {}, area border router: {}.",
92 flags.get(OVERLOAD_BIT), flags.get(ATTACHED_BIT), flags.get(EXTERNAL_BIT), flags.get(ABBR_BIT));
95 if (LOG.isDebugEnabled()) {
96 LOG.debug("Ignoring opaque value: {}.", ByteBufUtil.hexDump(value));
99 case DYNAMIC_HOSTNAME:
100 builder.setDynamicHostname(new String(ByteArray.readAllBytes(value), Charsets.US_ASCII));
101 LOG.debug("Parsed Node Name {}", builder.getDynamicHostname());
103 case ISIS_AREA_IDENTIFIER:
104 final IsisAreaIdentifier ai = new IsisAreaIdentifier(ByteArray.readAllBytes(value));
105 areaMembership.add(ai);
106 LOG.debug("Parsed AreaIdentifier {}", ai);
108 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
109 final Ipv4RouterIdentifier ip4 = new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value));
110 builder.setIpv4RouterId(ip4);
111 LOG.debug("Parsed IPv4 Router Identifier {}", ip4);
113 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
114 final Ipv6RouterIdentifier ip6 = new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value));
115 builder.setIpv6RouterId(ip6);
116 LOG.debug("Parsed IPv6 Router Identifier {}", ip6);
118 case SR_CAPABILITIES:
119 final SrCapabilities caps = SrNodeAttributesParser.parseSrCapabilities(value);
120 builder.setSrCapabilities(caps);
121 LOG.debug("Parsed SR Capabilities {}", caps);
124 final SrAlgorithm algs = SrNodeAttributesParser.parseSrAlgorithms(value);
125 builder.setSrAlgorithm(algs);
126 LOG.debug("Parsed SR Algorithms {}", algs);
129 LOG.warn("TLV {} is not a valid node attribute, ignoring it", key);
132 LOG.trace("Finished parsing Node Attributes.");
133 builder.setTopologyIdentifier(topologyMembership);
134 builder.setIsisAreaId(areaMembership);
135 return new NodeAttributesCaseBuilder().setNodeAttributes(builder.build()).build();
138 private static void parseTopologyId(final List<TopologyIdentifier> topologyMembership, final ByteBuf value) {
139 while (value.isReadable()) {
140 final TopologyIdentifier topId = new TopologyIdentifier(value.readUnsignedShort() & TlvUtil.TOPOLOGY_ID_OFFSET);
141 topologyMembership.add(topId);
142 LOG.debug("Parsed Topology Identifier: {}", topId);
146 static void serializeNodeAttributes(final NodeAttributesCase nodeAttributesCase, final ByteBuf byteAggregator) {
147 LOG.trace("Started serializing Node Attributes");
148 final NodeAttributes nodeAttributes = nodeAttributesCase.getNodeAttributes();
149 serializeTopologyId(nodeAttributes.getTopologyIdentifier(), byteAggregator);
150 serializeNodeFlagBits(nodeAttributes.getNodeFlags(), byteAggregator);
151 if (nodeAttributes.getDynamicHostname() != null) {
152 TlvUtil.writeTLV(DYNAMIC_HOSTNAME, Unpooled.wrappedBuffer(Charsets.UTF_8.encode(nodeAttributes.getDynamicHostname())), byteAggregator);
154 final List<IsisAreaIdentifier> isisList = nodeAttributes.getIsisAreaId();
155 if (isisList != null) {
156 for (final IsisAreaIdentifier isisAreaIdentifier : isisList) {
157 TlvUtil.writeTLV(ISIS_AREA_IDENTIFIER, Unpooled.wrappedBuffer(isisAreaIdentifier.getValue()), byteAggregator);
160 if (nodeAttributes.getIpv4RouterId() != null) {
161 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress(nodeAttributes.getIpv4RouterId()), byteAggregator);
163 if (nodeAttributes.getIpv6RouterId() != null) {
164 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress(nodeAttributes.getIpv6RouterId()), byteAggregator);
166 if (nodeAttributes.getSrCapabilities() != null) {
167 final ByteBuf capBuffer = Unpooled.buffer();
168 SrNodeAttributesParser.serializeSrCapabilities(nodeAttributes.getSrCapabilities(), capBuffer);
169 TlvUtil.writeTLV(SR_CAPABILITIES, capBuffer, byteAggregator);
171 if (nodeAttributes.getSrAlgorithm() != null) {
172 final ByteBuf capBuffer = Unpooled.buffer();
173 SrNodeAttributesParser.serializeSrAlgorithms(nodeAttributes.getSrAlgorithm(), capBuffer);
174 TlvUtil.writeTLV(SR_ALGORITHMS, capBuffer, byteAggregator);
176 LOG.trace("Finished serializing Node Attributes");
179 private static void serializeTopologyId(final List<TopologyIdentifier> topList, final ByteBuf byteAggregator) {
180 if (topList != null) {
181 final ByteBuf mpIdBuf = Unpooled.buffer();
182 for (final TopologyIdentifier topologyIdentifier : topList) {
183 mpIdBuf.writeShort(topologyIdentifier.getValue());
185 TlvUtil.writeTLV(TlvUtil.MULTI_TOPOLOGY_ID, mpIdBuf, byteAggregator);
189 private static void serializeNodeFlagBits(final NodeFlagBits nodeFlagBits, final ByteBuf byteAggregator) {
190 if (nodeFlagBits != null) {
191 final ByteBuf nodeFlagBuf = Unpooled.buffer(1);
192 final BitArray flags = new BitArray(FLAGS_SIZE);
193 flags.set(OVERLOAD_BIT, nodeFlagBits.isOverload());
194 flags.set(ATTACHED_BIT, nodeFlagBits.isAttached());
195 flags.set(EXTERNAL_BIT, nodeFlagBits.isExternal());
196 flags.set(ABBR_BIT, nodeFlagBits.isAbr());
197 flags.set(ROUTER_BIT, nodeFlagBits.isRouter());
198 flags.set(V6_BIT, nodeFlagBits.isV6());
199 flags.toByteBuf(nodeFlagBuf);
200 TlvUtil.writeTLV(NODE_FLAG_BITS, nodeFlagBuf, byteAggregator);