| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * 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.onosproject.pcepio.types; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.MoreObjects.ToStringHelper; |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.pcepio.protocol.PcepVersion; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Provides IPv6 Sub Object. |
| */ |
| public class IPv6SubObject implements PcepValueType { |
| |
| /* reference :RFC 4874. |
| Subobject : IPv6 address |
| |
| 0 1 2 3 |
| 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Type | Length | IPv6 address (16 bytes) | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | IPv6 address (continued) | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | IPv6 address (continued) | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | IPv6 address (continued) | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | IPv6 address (continued) | Prefix Length | Flags | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Type |
| |
| 0x02 IPv6 address |
| |
| Length |
| |
| The Length contains the total length of the subobject in bytes, |
| including the Type and Length fields. The Length is always 20. |
| |
| IPv6 address |
| |
| A 128-bit unicast host address. |
| |
| Prefix length |
| |
| 128 |
| |
| Flags |
| |
| 0x01 Local protection available |
| |
| Indicates that the link downstream of this node is |
| protected via a local repair mechanism. This flag can |
| only be set if the Local protection flag was set in the |
| SESSION_ATTRIBUTE object of the corresponding Path |
| message. |
| |
| 0x02 Local protection in use |
| |
| Indicates that a local repair mechanism is in use to |
| maintain this tunnel (usually in the face of an outage |
| of the link it was previously routed over). |
| */ |
| protected static final Logger log = LoggerFactory.getLogger(IPv6SubObject.class); |
| |
| public static final short TYPE = 0x02; |
| public static final short LENGTH = 20; |
| public static final byte VALUE_LENGTH = 18; |
| |
| private static final byte[] NONE_VAL = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; |
| public static final IPv6SubObject NONE = new IPv6SubObject(NONE_VAL); |
| |
| private static final byte[] NO_MASK_VAL = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, |
| (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, |
| (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF }; |
| public static final IPv6SubObject NO_MASK = new IPv6SubObject(NO_MASK_VAL); |
| public static final IPv6SubObject FULL_MASK = NONE; |
| |
| private final byte[] rawValue; |
| |
| /** |
| * constructor to initialize rawValue with ipv6 address. |
| * |
| * @param rawValue ipv6 address |
| */ |
| public IPv6SubObject(byte[] rawValue) { |
| this.rawValue = rawValue; |
| } |
| |
| /** |
| * To create instance of IPv6SubObject. |
| * |
| * @param raw byte array of ipv6 address |
| * @return object of IPv6SubObject |
| */ |
| public static IPv6SubObject of(final byte[] raw) { |
| //check NONE_VAL |
| boolean bFoundNone = true; |
| //value starts from 3rd byte. |
| for (int i = 2; i < 20; ++i) { |
| if (NONE_VAL[i] != raw[i]) { |
| bFoundNone = false; |
| } |
| } |
| |
| if (bFoundNone) { |
| return NONE; |
| } |
| |
| //check NO_MASK_VAL |
| boolean bFoundNoMask = true; |
| //value starts from 3rd byte. |
| for (int i = 2; i < 20; ++i) { |
| if (0xFF != raw[i]) { |
| bFoundNoMask = false; |
| } |
| } |
| if (bFoundNoMask) { |
| return NO_MASK; |
| } |
| |
| return new IPv6SubObject(raw); |
| } |
| |
| /** |
| * Returns value of IPv6 Sub Object. |
| * |
| * @return byte array of ipv6 address |
| */ |
| public byte[] getValue() { |
| return rawValue; |
| } |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public short getType() { |
| return TYPE; |
| } |
| |
| @Override |
| public short getLength() { |
| return LENGTH; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Arrays.hashCode(rawValue); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof IPv6SubObject) { |
| IPv6SubObject other = (IPv6SubObject) obj; |
| return Arrays.equals(rawValue, other.rawValue); |
| } |
| return false; |
| } |
| |
| @Override |
| public int write(ChannelBuffer c) { |
| int iStartIndex = c.writerIndex(); |
| c.writeShort(TYPE); |
| c.writeShort(LENGTH); |
| c.writeBytes(rawValue); |
| return c.writerIndex() - iStartIndex; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of IPv6SubObject. |
| * |
| * @param c type of channel buffer |
| * @return object of IPv6SubObject |
| */ |
| public static IPv6SubObject read20Bytes(ChannelBuffer c) { |
| byte[] yTemp = new byte[20]; |
| c.readBytes(yTemp, 0, 20); |
| return IPv6SubObject.of(yTemp); |
| } |
| |
| @Override |
| public String toString() { |
| ToStringHelper toStrHelper = MoreObjects.toStringHelper(getClass()); |
| |
| toStrHelper.add("Type", TYPE); |
| toStrHelper.add("Length", LENGTH); |
| |
| StringBuffer result = new StringBuffer(); |
| for (byte b : rawValue) { |
| result.append(String.format("%02X ", b)); |
| } |
| toStrHelper.add("Value", result); |
| |
| return toStrHelper.toString(); |
| } |
| } |