2 * Copyright (c) 2013 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.bgpcep.bgp.topology.provider;
10 import com.google.common.io.BaseEncoding;
11 import com.google.common.primitives.UnsignedBytes;
12 import java.util.Arrays;
13 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.IsisAreaIdentifier;
14 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.NodeIdentifier;
15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.linkstate.object.type.LinkCase;
16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.linkstate.object.type.link._case.LinkDescriptors;
17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.linkstate.routes.linkstate.routes.LinkstateRoute;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.CRouterIdentifier;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.IsisNodeCase;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.IsisPseudonodeCase;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.OspfNodeCase;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.OspfPseudonodeCase;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.isis.pseudonode._case.IsisPseudonode;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev171207.node.identifier.c.router.identifier.ospf.pseudonode._case.OspfPseudonode;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
29 final class UriBuilder {
30 private static final Logger LOG = LoggerFactory.getLogger(UriBuilder.class);
31 private static final char HEX_SEPARATOR = '.';
32 private static final int AREA_ID_MAX_SIZE = 7;
33 private final StringBuilder sb;
35 UriBuilder(final UriBuilder base, final String type) {
36 this.sb = new StringBuilder(base.sb);
37 this.sb.append("type=").append(type);
40 UriBuilder(final LinkstateRoute route) {
41 this.sb = new StringBuilder("bgpls://");
43 if (route.getDistinguisher() != null) {
44 this.sb.append(route.getDistinguisher().getValue().toString()).append(':');
47 this.sb.append(route.getProtocolId().toString()).append(':')
48 .append(route.getIdentifier().getValue().toString()).append('/');
51 UriBuilder add(final String name, final Object value) {
53 this.sb.append('&').append(name).append('=').append(value.toString());
58 UriBuilder add(final LinkCase link) {
59 addPrefix("local-", link.getLocalNodeDescriptors());
60 addPrefix("remote-", link.getRemoteNodeDescriptors());
62 final LinkDescriptors ld = link.getLinkDescriptors();
63 if (ld.getIpv4InterfaceAddress() != null) {
64 add("ipv4-iface", ld.getIpv4InterfaceAddress().getValue());
66 if (ld.getIpv4NeighborAddress() != null) {
67 add("ipv4-neigh", ld.getIpv4NeighborAddress().getValue());
69 if (ld.getIpv6InterfaceAddress() != null) {
70 add("ipv6-iface", ld.getIpv6InterfaceAddress().getValue());
72 if (ld.getIpv6NeighborAddress() != null) {
73 add("ipv6-neigh", ld.getIpv6NeighborAddress().getValue());
75 if (ld.getMultiTopologyId() != null) {
76 add("mt", ld.getMultiTopologyId().getValue());
78 add("local-id", ld.getLinkLocalIdentifier());
79 add("remote-id", ld.getLinkRemoteIdentifier());
83 private static String isoId(final byte[] bytes) {
84 final StringBuilder sBuilder = new StringBuilder();
86 while (id < bytes.length) {
87 sBuilder.append(BaseEncoding.base16().encode(new byte[] { bytes[id++], bytes[id++] }));
88 if (id != bytes.length) {
89 sBuilder.append(HEX_SEPARATOR);
92 return sBuilder.toString();
96 * Creates a String representation of ISO system identifier
97 * in format XX.XX.XX where X is one byte.
99 * @param systemId IsoSystemIdentifier object
100 * @return String representation of ISO Identifier
102 public static String isoId(final IsoSystemIdentifier systemId) {
103 return isoId(systemId.getValue());
106 private static String formatRouterIdentifier(final CRouterIdentifier routerIdentifier) {
107 if (routerIdentifier == null) {
110 if (routerIdentifier instanceof IsisNodeCase) {
111 return isoId(((IsisNodeCase) routerIdentifier).getIsisNode().getIsoSystemId());
113 if (routerIdentifier instanceof IsisPseudonodeCase) {
114 final IsisPseudonode r = ((IsisPseudonodeCase) routerIdentifier).getIsisPseudonode();
115 return isoId(r.getIsIsRouterIdentifier().getIsoSystemId().getValue()) + '.'
116 + BaseEncoding.base16().encode(new byte[] { UnsignedBytes.checkedCast(r.getPsn()) });
118 if (routerIdentifier instanceof OspfNodeCase) {
119 return ((OspfNodeCase) routerIdentifier).getOspfNode().getOspfRouterId().toString();
121 if (routerIdentifier instanceof OspfPseudonodeCase) {
122 final OspfPseudonode r = ((OspfPseudonodeCase) routerIdentifier).getOspfPseudonode();
123 return r.getOspfRouterId().toString() + ':' + r.getLanInterface().getValue();
125 LOG.warn("Unhandled router identifier type {}, fallback to toString()",
126 routerIdentifier.getImplementedInterface());
127 return routerIdentifier.toString();
130 UriBuilder addPrefix(final String prefix, final NodeIdentifier node) {
131 if (node.getAsNumber() != null) {
132 add(prefix + "as", node.getAsNumber().getValue());
134 if (node.getDomainId() != null) {
135 add(prefix + "domain", node.getDomainId().getValue());
137 if (node.getAreaId() != null) {
138 add(prefix + "area", node.getAreaId().getValue());
140 add(prefix + "router", formatRouterIdentifier(node.getCRouterIdentifier()));
145 public String toString() {
146 final String ret = this.sb.toString();
147 LOG.trace("New URI {}", ret);
152 * Creates string representation of IS-IS Network Entity Title,
153 * based on Area Identifier and System Identifier.
155 * @param areaId IS-IS Area Identifier
156 * @param systemId string representation of ISO SYSTEM-ID
159 public static String toIsoNetId(final IsisAreaIdentifier areaId, final String systemId) {
160 final byte[] value = areaId.getValue();
162 //ISIS area identifier might have variable length, but need to fit the IsoNetId pattern
163 return BaseEncoding.base16().encode(value, 0, 1) + HEX_SEPARATOR
164 + UriBuilder.isoId(Arrays.copyOfRange(value, 1, AREA_ID_MAX_SIZE)) + HEX_SEPARATOR + systemId;