| /* |
| * Copyright 2016-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.bgpio.types; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onlab.packet.IpPrefix; |
| import org.onosproject.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.util.Constants; |
| import org.onosproject.bgpio.util.Validation; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Provides implementation of IPv4AddressTlv. |
| */ |
| public class BgpFsSourcePrefix implements BgpValueType { |
| |
| public static final byte FLOW_SPEC_TYPE = Constants.BGP_FLOWSPEC_SRC_PREFIX; |
| private byte length; |
| private IpPrefix ipPrefix; |
| public static final int BYTE_IN_BITS = 8; |
| /** |
| * Constructor to initialize parameters. |
| * |
| * @param length length of the prefix |
| * @param ipPrefix ip prefix |
| */ |
| public BgpFsSourcePrefix(byte length, IpPrefix ipPrefix) { |
| this.ipPrefix = Preconditions.checkNotNull(ipPrefix); |
| this.length = length; |
| } |
| |
| /** |
| * Returns ip prefix. |
| * |
| * @return ipPrefix ip prefix |
| */ |
| public IpPrefix ipPrefix() { |
| return ipPrefix; |
| } |
| |
| @Override |
| public short getType() { |
| return this.FLOW_SPEC_TYPE; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(ipPrefix); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof BgpFsSourcePrefix) { |
| BgpFsSourcePrefix other = (BgpFsSourcePrefix) obj; |
| return Objects.equals(this.ipPrefix, other.ipPrefix) && Objects.equals(this.length, other.length); |
| } |
| return false; |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| int iLenStartIndex = cb.writerIndex(); |
| cb.writeByte(FLOW_SPEC_TYPE); |
| cb.writeByte(length); |
| cb.writeInt(ipPrefix.getIp4Prefix().address().toInt()); |
| return cb.writerIndex() - iLenStartIndex; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of IPv4AddressTlv. |
| * |
| * @param cb channelBuffer |
| * @return object of flow spec source prefix |
| * @throws BgpParseException while parsing BgpFsSourcePrefix |
| */ |
| public static BgpFsSourcePrefix read(ChannelBuffer cb) throws BgpParseException { |
| IpPrefix ipPrefix; |
| |
| int length = cb.readByte(); |
| if (length == 0) { |
| byte[] prefix = new byte[] {0}; |
| ipPrefix = Validation.bytesToPrefix(prefix, length); |
| return new BgpFsSourcePrefix((byte) ipPrefix.prefixLength(), ipPrefix); |
| } |
| |
| int len = length / BYTE_IN_BITS; |
| int reminder = length % BYTE_IN_BITS; |
| if (reminder > 0) { |
| len = len + 1; |
| } |
| if (cb.readableBytes() < len) { |
| Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, |
| BgpErrorType.MALFORMED_ATTRIBUTE_LIST, cb.readableBytes()); |
| } |
| byte[] prefix = new byte[len]; |
| cb.readBytes(prefix, 0, len); |
| ipPrefix = Validation.bytesToPrefix(prefix, length); |
| |
| return new BgpFsSourcePrefix((byte) ipPrefix.prefixLength(), ipPrefix); |
| } |
| |
| /** |
| * Returns object of this class with specified values. |
| * |
| * @param ipPrefix ip prefix |
| * @param length length of ip prefix |
| * @return object of this class |
| */ |
| public static BgpFsSourcePrefix of(final IpPrefix ipPrefix, final byte length) { |
| return new BgpFsSourcePrefix(length, ipPrefix); |
| } |
| |
| @Override |
| public int compareTo(Object o) { |
| if (this.equals(o)) { |
| return 0; |
| } |
| |
| if (o instanceof BgpFsSourcePrefix) { |
| BgpFsSourcePrefix that = (BgpFsSourcePrefix) o; |
| |
| if (this.ipPrefix().prefixLength() == that.ipPrefix().prefixLength()) { |
| ByteBuffer value1 = ByteBuffer.wrap(this.ipPrefix.address().toOctets()); |
| ByteBuffer value2 = ByteBuffer.wrap(that.ipPrefix.address().toOctets()); |
| return value1.compareTo(value2); |
| } |
| |
| if (this.ipPrefix().prefixLength() > that.ipPrefix().prefixLength()) { |
| return 1; |
| } else if (this.ipPrefix().prefixLength() < that.ipPrefix().prefixLength()) { |
| return -1; |
| } |
| } |
| return 1; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("FLOW_SPEC_TYPE", FLOW_SPEC_TYPE).add("length", length) |
| .add("ipPrefix", ipPrefix).toString(); |
| } |
| } |