| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.onlab.packet.dhcp; |
| |
| import com.google.common.collect.Lists; |
| import org.onlab.packet.DHCP6; |
| import org.onlab.packet.DeserializationException; |
| import org.onlab.packet.Deserializer; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * DHCPv6 Identity Association for Prefix Delegation Option. |
| * Based on RFC-3633 |
| */ |
| public final class Dhcp6IaPdOption extends Dhcp6Option { |
| public static final int DEFAULT_LEN = 12; |
| private int iaId; |
| private int t1; |
| private int t2; |
| private List<Dhcp6Option> options; |
| |
| @Override |
| public short getCode() { |
| return DHCP6.OptionCode.IA_PD.value(); |
| } |
| |
| @Override |
| public short getLength() { |
| return (short) (DEFAULT_LEN + options.stream() |
| .mapToInt(opt -> (int) opt.getLength() + Dhcp6Option.DEFAULT_LEN) |
| .sum()); |
| |
| } |
| |
| /** |
| * Gets Identity Association ID. |
| * The unique identifier for this IA_PD; the IAID must |
| * be unique among the identifiers for all of this |
| * requesting router's IA_PDs. |
| * |
| * @return the Identity Association ID |
| */ |
| public int getIaId() { |
| return iaId; |
| } |
| |
| /** |
| * Sets Identity Association ID. |
| * |
| * @param iaId the Identity Association ID. |
| */ |
| public void setIaId(int iaId) { |
| this.iaId = iaId; |
| } |
| |
| /** |
| * Gets time 1. |
| * The time at which the requesting router should |
| * contact the delegating router from which the |
| * prefixes in the IA_PD were obtained to extend the |
| * lifetimes of the prefixes delegated to the IA_PD; |
| * T1 is a time duration relative to the current time |
| * expressed in units of seconds. |
| * |
| * @return the value of time 1 |
| */ |
| public int getT1() { |
| return t1; |
| } |
| |
| /** |
| * Sets time 1. |
| * |
| * @param t1 the value of time 1 |
| */ |
| public void setT1(int t1) { |
| this.t1 = t1; |
| } |
| |
| /** |
| * Gets time 2. |
| * The time at which the requesting router should |
| * contact any available delegating router to extend |
| * the lifetimes of the prefixes assigned to the |
| * IA_PD; T2 is a time duration relative to the |
| * current time expressed in units of seconds. |
| * |
| * @return the value of time 2 |
| */ |
| public int getT2() { |
| return t2; |
| } |
| |
| /** |
| * Sets time 2. |
| * |
| * @param t2 the value of time 2 |
| */ |
| public void setT2(int t2) { |
| this.t2 = t2; |
| } |
| |
| /** |
| * Gets sub-options. |
| * |
| * @return sub-options of this option |
| */ |
| public List<Dhcp6Option> getOptions() { |
| return options; |
| } |
| |
| /** |
| * Sets sub-options. |
| * |
| * @param options the sub-options of this option |
| */ |
| public void setOptions(List<Dhcp6Option> options) { |
| this.options = options; |
| } |
| |
| /** |
| * Default constructor. |
| */ |
| public Dhcp6IaPdOption() { |
| } |
| |
| /** |
| * Constructs a DHCPv6 IA PD option with DHCPv6 option. |
| * |
| * @param dhcp6Option the DHCPv6 option |
| */ |
| public Dhcp6IaPdOption(Dhcp6Option dhcp6Option) { |
| super(dhcp6Option); |
| } |
| |
| /** |
| * Gets deserializer. |
| * |
| * @return the deserializer |
| */ |
| public static Deserializer<Dhcp6Option> deserializer() { |
| return (data, offset, length) -> { |
| Dhcp6Option dhcp6Option = |
| Dhcp6Option.deserializer().deserialize(data, offset, length); |
| if (dhcp6Option.getLength() < DEFAULT_LEN) { |
| throw new DeserializationException("Invalid IA PD option data"); |
| } |
| Dhcp6IaPdOption iaPdOption = new Dhcp6IaPdOption(dhcp6Option); |
| byte[] optionData = iaPdOption.getData(); |
| ByteBuffer bb = ByteBuffer.wrap(optionData); |
| iaPdOption.iaId = bb.getInt(); |
| iaPdOption.t1 = bb.getInt(); |
| iaPdOption.t2 = bb.getInt(); |
| |
| iaPdOption.options = Lists.newArrayList(); |
| while (bb.remaining() >= Dhcp6Option.DEFAULT_LEN) { |
| Dhcp6Option option; |
| ByteBuffer optByteBuffer = ByteBuffer.wrap(optionData, |
| bb.position(), |
| optionData.length - bb.position()); |
| short code = optByteBuffer.getShort(); |
| short len = optByteBuffer.getShort(); |
| int optLen = UNSIGNED_SHORT_MASK & len; |
| byte[] subOptData = new byte[Dhcp6Option.DEFAULT_LEN + optLen]; |
| bb.get(subOptData); |
| |
| // TODO: put more sub-options? |
| if (code == DHCP6.OptionCode.IAPREFIX.value()) { |
| option = Dhcp6IaPrefixOption.deserializer() |
| .deserialize(subOptData, 0, subOptData.length); |
| } else { |
| option = Dhcp6Option.deserializer() |
| .deserialize(subOptData, 0, subOptData.length); |
| } |
| iaPdOption.options.add(option); |
| } |
| return iaPdOption; |
| }; |
| } |
| |
| @Override |
| public byte[] serialize() { |
| int payloadLen = DEFAULT_LEN + options.stream() |
| .mapToInt(opt -> (int) opt.getLength() + Dhcp6Option.DEFAULT_LEN) |
| .sum(); |
| int len = Dhcp6Option.DEFAULT_LEN + payloadLen; |
| ByteBuffer bb = ByteBuffer.allocate(len); |
| bb.putShort(DHCP6.OptionCode.IA_PD.value()); |
| bb.putShort((short) payloadLen); |
| bb.putInt(iaId); |
| bb.putInt(t1); |
| bb.putInt(t2); |
| |
| options.stream().map(Dhcp6Option::serialize).forEach(bb::put); |
| return bb.array(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 31 * super.hashCode() + Objects.hash(iaId, t1, t2, options); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| if (!super.equals(obj)) { |
| return false; |
| } |
| final Dhcp6IaPdOption other = (Dhcp6IaPdOption) obj; |
| return Objects.equals(this.iaId, other.iaId) |
| && Objects.equals(this.t1, other.t1) |
| && Objects.equals(this.t2, other.t2) |
| && Objects.equals(this.options, other.options); |
| } |
| |
| @Override |
| public String toString() { |
| return getToStringHelper() |
| .add("iaId", iaId) |
| .add("t1", t1) |
| .add("t2", t2) |
| .add("options", options) |
| .toString(); |
| } |
| } |