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.protocol.pcep.ietf.stateful07;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv4Address;
12 import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeIpv6Address;
14 import io.netty.buffer.ByteBuf;
15 import io.netty.buffer.Unpooled;
16 import java.nio.charset.StandardCharsets;
17 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
18 import org.opendaylight.protocol.pcep.spi.TlvParser;
19 import org.opendaylight.protocol.pcep.spi.TlvSerializer;
20 import org.opendaylight.protocol.pcep.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.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddressNoZone;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.iana.rev130816.EnterpriseNumber;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.RsvpErrorSpec;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.RsvpErrorSpecBuilder;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.ErrorType;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.RsvpCase;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.RsvpCaseBuilder;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.UserCase;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.UserCaseBuilder;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.rsvp._case.RsvpError;
35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.rsvp._case.RsvpErrorBuilder;
36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.user._case.UserError;
37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev181109.rsvp.error.spec.tlv.rsvp.error.spec.error.type.user._case.UserErrorBuilder;
38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Tlv;
39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.ErrorSpec.Flags;
40 import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
43 * Parser for {@link RsvpErrorSpec}.
45 public final class Stateful07RSVPErrorSpecTlvParser implements TlvParser, TlvSerializer {
46 public static final int TYPE = 21;
48 private static final int FLAGS_SIZE = 8;
49 private static final int HEADER_LENGTH = 4;
51 private static final int RSVP_ERROR_CLASS_NUM = 6;
52 private static final int RSVP_IPV4_ERROR_CLASS_TYPE = 1;
53 private static final int RSVP_IPV6_ERROR_CLASS_TYPE = 2;
55 private static final int USER_ERROR_CLASS_NUM = 194;
56 private static final int USER_ERROR_CLASS_TYPE = 1;
58 private static final int IN_PLACE = 7;
59 private static final int NOT_GUILTY = 6;
62 public RsvpErrorSpec parseTlv(final ByteBuf buffer) throws PCEPDeserializerException {
66 // throw away contents of length field
67 buffer.readUnsignedShort();
68 final int classNum = buffer.readUnsignedByte();
69 final int classType = buffer.readUnsignedByte();
70 ErrorType errorType = null;
71 if (classNum == RSVP_ERROR_CLASS_NUM) {
72 errorType = parseRsvp(classType, buffer.slice());
73 } else if (classNum == USER_ERROR_CLASS_NUM && classType == USER_ERROR_CLASS_TYPE) {
74 errorType = parseUserError(buffer.slice());
76 return new RsvpErrorSpecBuilder().setErrorType(errorType).build();
80 public void serializeTlv(final Tlv tlv, final ByteBuf buffer) {
81 checkArgument(tlv instanceof RsvpErrorSpec, "RSVPErrorSpecTlv is mandatory.");
82 final RsvpErrorSpec rsvp = (RsvpErrorSpec) tlv;
83 final ByteBuf body = Unpooled.buffer();
84 if (rsvp.getErrorType().implementedInterface().equals(RsvpCase.class)) {
85 final RsvpCase r = (RsvpCase) rsvp.getErrorType();
86 serializeRsvp(r.getRsvpError(), body);
87 TlvUtil.formatTlv(TYPE, body, buffer);
89 final UserCase u = (UserCase) rsvp.getErrorType();
90 serializerUserError(u.getUserError(), body);
91 TlvUtil.formatTlv(TYPE, body, buffer);
95 private static UserCase parseUserError(final ByteBuf buffer) {
96 final UserErrorBuilder error = new UserErrorBuilder()
97 .setEnterprise(new EnterpriseNumber(ByteBufUtils.readUint32(buffer)));
98 error.setSubOrg(ByteBufUtils.readUint8(buffer));
99 final int errDescrLength = buffer.readUnsignedByte();
100 error.setValue(ByteBufUtils.readUint16(buffer));
101 error.setDescription(ByteArray.bytesToHRString(ByteArray.readBytes(buffer, errDescrLength)));
102 // if we have any subobjects, place the implementation here
103 return new UserCaseBuilder().setUserError(error.build()).build();
106 private static void serializerUserError(final UserError ue, final ByteBuf body) {
107 final String description = ue.getDescription();
108 final byte[] desc = description == null ? new byte[0] : description.getBytes(StandardCharsets.UTF_8);
109 final ByteBuf userErrorBuf = Unpooled.buffer();
110 final EnterpriseNumber enterprise = ue.getEnterprise();
111 checkArgument(enterprise != null, "EnterpriseNumber is mandatory");
112 ByteBufUtils.write(userErrorBuf, enterprise.getValue());
113 ByteBufUtils.writeOrZero(userErrorBuf, ue.getSubOrg());
114 userErrorBuf.writeByte(desc.length);
115 ByteBufUtils.writeMandatory(userErrorBuf, ue.getValue(), "Value");
116 userErrorBuf.writeBytes(desc);
117 userErrorBuf.writeZero(TlvUtil.getPadding(desc.length, TlvUtil.PADDED_TO));
118 formatRSVPObject(USER_ERROR_CLASS_NUM, USER_ERROR_CLASS_TYPE, userErrorBuf, body);
121 private static RsvpCase parseRsvp(final int classType, final ByteBuf buffer) {
122 final RsvpErrorBuilder builder = new RsvpErrorBuilder();
123 if (classType == RSVP_IPV4_ERROR_CLASS_TYPE) {
124 builder.setNode(new IpAddressNoZone(Ipv4Util.noZoneAddressForByteBuf(buffer)));
125 } else if (classType == RSVP_IPV6_ERROR_CLASS_TYPE) {
126 builder.setNode(new IpAddressNoZone(Ipv6Util.noZoneAddressForByteBuf(buffer)));
128 final BitArray flags = BitArray.valueOf(buffer, FLAGS_SIZE);
129 builder.setFlags(new Flags(flags.get(IN_PLACE), flags.get(NOT_GUILTY)));
130 builder.setCode(ByteBufUtils.readUint8(buffer));
131 builder.setValue(ByteBufUtils.readUint16(buffer));
132 return new RsvpCaseBuilder().setRsvpError(builder.build()).build();
135 private static void serializeRsvp(final RsvpError rsvp, final ByteBuf body) {
136 final BitArray flags = new BitArray(FLAGS_SIZE);
137 flags.set(IN_PLACE, rsvp.getFlags().isInPlace());
138 flags.set(NOT_GUILTY, rsvp.getFlags().isNotGuilty());
139 final IpAddressNoZone node = rsvp.getNode();
140 checkArgument(node != null, "Node is mandatory.");
141 final ByteBuf rsvpObjBuf = Unpooled.buffer();
143 if (node.getIpv4AddressNoZone() != null) {
144 type = RSVP_IPV4_ERROR_CLASS_TYPE;
145 writeIpv4Address(node.getIpv4AddressNoZone(), rsvpObjBuf);
147 type = RSVP_IPV6_ERROR_CLASS_TYPE;
148 writeIpv6Address(node.getIpv6AddressNoZone(), rsvpObjBuf);
150 flags.toByteBuf(rsvpObjBuf);
151 ByteBufUtils.writeMandatory(rsvpObjBuf, rsvp.getCode(), "Code");
152 ByteBufUtils.writeMandatory(rsvpObjBuf, rsvp.getValue(), "Value");
153 formatRSVPObject(RSVP_ERROR_CLASS_NUM, type, rsvpObjBuf, body);
156 private static void formatRSVPObject(final int objClass, final int type, final ByteBuf body, final ByteBuf out) {
157 out.writeShort(body.writerIndex() + HEADER_LENGTH);
158 out.writeByte(objClass);
160 out.writeBytes(body);