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.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.state.SrSidLabel;
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);
46 private NodeAttributesParser() {
47 throw new UnsupportedOperationException();
50 private static final int FLAGS_SIZE = 8;
53 private static final int OVERLOAD_BIT = 0;
54 private static final int ATTACHED_BIT = 1;
55 private static final int EXTERNAL_BIT = 2;
56 private static final int ABBR_BIT = 3;
58 /* Node Attribute TLVs */
59 private static final int NODE_FLAG_BITS = 1024;
60 private static final int NODE_OPAQUE = 1025;
61 private static final int DYNAMIC_HOSTNAME = 1026;
62 private static final int ISIS_AREA_IDENTIFIER = 1027;
64 /* Segment routing TLVs */
65 private static final int SID_LABEL_BINDING = 1033;
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(EXTERNAL_BIT), flags.get(ABBR_BIT)));
90 LOG.debug("Parsed Overload bit: {}, attached bit: {}, external bit: {}, area border router: {}.",
91 flags.get(OVERLOAD_BIT), flags.get(ATTACHED_BIT), flags.get(EXTERNAL_BIT), flags.get(ABBR_BIT));
94 if (LOG.isDebugEnabled()) {
95 LOG.debug("Ignoring opaque value: {}.", ByteBufUtil.hexDump(value));
98 case DYNAMIC_HOSTNAME:
99 builder.setDynamicHostname(new String(ByteArray.readAllBytes(value), Charsets.US_ASCII));
100 LOG.debug("Parsed Node Name {}", builder.getDynamicHostname());
102 case ISIS_AREA_IDENTIFIER:
103 final IsisAreaIdentifier ai = new IsisAreaIdentifier(ByteArray.readAllBytes(value));
104 areaMembership.add(ai);
105 LOG.debug("Parsed AreaIdentifier {}", ai);
107 case TlvUtil.LOCAL_IPV4_ROUTER_ID:
108 final Ipv4RouterIdentifier ip4 = new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value));
109 builder.setIpv4RouterId(ip4);
110 LOG.debug("Parsed IPv4 Router Identifier {}", ip4);
112 case TlvUtil.LOCAL_IPV6_ROUTER_ID:
113 final Ipv6RouterIdentifier ip6 = new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value));
114 builder.setIpv6RouterId(ip6);
115 LOG.debug("Parsed IPv6 Router Identifier {}", ip6);
117 case SID_LABEL_BINDING:
118 final SrSidLabel label = SrNodeAttributesParser.parseSidLabelBinding(value);
119 builder.setSrSidLabel(label);
120 LOG.debug("Parsed SID Label Binding {}", label);
122 case SR_CAPABILITIES:
123 final SrCapabilities caps = SrNodeAttributesParser.parseSrCapabilities(value);
124 builder.setSrCapabilities(caps);
125 LOG.debug("Parsed SR Capabilities {}", caps);
128 final SrAlgorithm algs = SrNodeAttributesParser.parseSrAlgorithms(value);
129 builder.setSrAlgorithm(algs);
130 LOG.debug("Parsed SR Algorithms {}", algs);
133 LOG.warn("TLV {} is not a valid node attribute, ignoring it", key);
136 LOG.trace("Finished parsing Node Attributes.");
137 builder.setTopologyIdentifier(topologyMembership);
138 builder.setIsisAreaId(areaMembership);
139 return new NodeAttributesCaseBuilder().setNodeAttributes(builder.build()).build();
142 private static void parseTopologyId(final List<TopologyIdentifier> topologyMembership, final ByteBuf value) {
143 while (value.isReadable()) {
144 final TopologyIdentifier topId = new TopologyIdentifier(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(Charsets.UTF_8.encode(nodeAttributes.getDynamicHostname())), byteAggregator);
158 final List<IsisAreaIdentifier> isisList = nodeAttributes.getIsisAreaId();
159 if (isisList != null) {
160 for (final IsisAreaIdentifier isisAreaIdentifier : isisList) {
161 TlvUtil.writeTLV(ISIS_AREA_IDENTIFIER, Unpooled.wrappedBuffer(isisAreaIdentifier.getValue()), byteAggregator);
164 if (nodeAttributes.getIpv4RouterId() != null) {
165 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV4_ROUTER_ID, Ipv4Util.byteBufForAddress(nodeAttributes.getIpv4RouterId()), byteAggregator);
167 if (nodeAttributes.getIpv6RouterId() != null) {
168 TlvUtil.writeTLV(TlvUtil.LOCAL_IPV6_ROUTER_ID, Ipv6Util.byteBufForAddress(nodeAttributes.getIpv6RouterId()), byteAggregator);
170 if (nodeAttributes.getSrSidLabel() != null) {
171 final ByteBuf sidBuffer = Unpooled.buffer();
172 SrNodeAttributesParser.serializeSidLabelBinding(nodeAttributes.getSrSidLabel(), sidBuffer);
173 TlvUtil.writeTLV(SID_LABEL_BINDING, sidBuffer, byteAggregator);
175 if (nodeAttributes.getSrCapabilities() != null) {
176 final ByteBuf capBuffer = Unpooled.buffer();
177 SrNodeAttributesParser.serializeSrCapabilities(nodeAttributes.getSrCapabilities(), capBuffer);
178 TlvUtil.writeTLV(SR_CAPABILITIES, capBuffer, byteAggregator);
180 if (nodeAttributes.getSrAlgorithm() != null) {
181 final ByteBuf capBuffer = Unpooled.buffer();
182 SrNodeAttributesParser.serializeSrAlgorithms(nodeAttributes.getSrAlgorithm(), capBuffer);
183 TlvUtil.writeTLV(SR_ALGORITHMS, capBuffer, byteAggregator);
185 LOG.trace("Finished serializing Node Attributes");
188 private static void serializeTopologyId(final List<TopologyIdentifier> topList, final ByteBuf byteAggregator) {
189 if (topList != null) {
190 final ByteBuf mpIdBuf = Unpooled.buffer();
191 for (final TopologyIdentifier topologyIdentifier : topList) {
192 mpIdBuf.writeShort(topologyIdentifier.getValue());
194 TlvUtil.writeTLV(TlvUtil.MULTI_TOPOLOGY_ID, mpIdBuf, byteAggregator);
198 private static void serializeNodeFlagBits(final NodeFlagBits nodeFlagBits, final ByteBuf byteAggregator) {
199 if (nodeFlagBits != null) {
200 final ByteBuf nodeFlagBuf = Unpooled.buffer(1);
201 final BitArray flags = new BitArray(FLAGS_SIZE);
202 flags.set(OVERLOAD_BIT, nodeFlagBits.isOverload());
203 flags.set(ATTACHED_BIT, nodeFlagBits.isAttached());
204 flags.set(EXTERNAL_BIT, nodeFlagBits.isExternal());
205 flags.set(ABBR_BIT, nodeFlagBits.isAbr());
206 flags.toByteBuf(nodeFlagBuf);
207 TlvUtil.writeTLV(NODE_FLAG_BITS, nodeFlagBuf, byteAggregator);