| /* |
| * 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 com.google.common.base.MoreObjects; |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.util.Constants; |
| import org.onosproject.bgpio.util.Validation; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Objects; |
| |
| /** |
| * Provides implementation of extended community BGP Path Attribute. |
| */ |
| public class BgpExtendedCommunity implements BgpValueType { |
| |
| private static final Logger log = LoggerFactory.getLogger(BgpExtendedCommunity.class); |
| public static final short TYPE = Constants.BGP_EXTENDED_COMMUNITY; |
| public static final byte FLAGS = (byte) 0xC0; |
| private List<BgpValueType> fsActionTlv; |
| |
| /** |
| * Constructor to initialize the value. |
| * |
| * @param fsActionTlv flow specification action type |
| */ |
| public BgpExtendedCommunity(List<BgpValueType> fsActionTlv) { |
| this.fsActionTlv = fsActionTlv; |
| } |
| |
| /** |
| * Returns extended community type. |
| * |
| * @return extended community |
| */ |
| public List<BgpValueType> fsActionTlv() { |
| return this.fsActionTlv; |
| } |
| |
| /** |
| * Reads from the channel buffer and parses extended community. |
| * |
| * @param cb ChannelBuffer |
| * @return object of BgpExtendedCommunity |
| * @throws BgpParseException while parsing extended community |
| */ |
| public static BgpExtendedCommunity read(ChannelBuffer cb) throws BgpParseException { |
| |
| ChannelBuffer tempCb = cb.copy(); |
| Validation validation = Validation.parseAttributeHeader(cb); |
| List<BgpValueType> fsActionTlvs = new LinkedList<>(); |
| |
| if (cb.readableBytes() < validation.getLength()) { |
| Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_LENGTH_ERROR, |
| validation.getLength()); |
| } |
| //if fourth bit is set, length is read as short otherwise as byte , len includes type, length and value |
| int len = validation.isShort() ? validation.getLength() + Constants.TYPE_AND_LEN_AS_SHORT : validation |
| .getLength() + Constants.TYPE_AND_LEN_AS_BYTE; |
| ChannelBuffer data = tempCb.readBytes(len); |
| if (validation.getFirstBit() && !validation.getSecondBit() && validation.getThirdBit()) { |
| throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_FLAGS_ERROR, data); |
| } |
| |
| ChannelBuffer tempBuf = cb.readBytes(validation.getLength()); |
| if (tempBuf.readableBytes() > 0) { |
| BgpValueType fsActionTlv = null; |
| ChannelBuffer actionBuf = tempBuf.readBytes(validation.getLength()); |
| |
| while (actionBuf.readableBytes() > 0) { |
| short actionType = actionBuf.readShort(); |
| switch (actionType) { |
| case Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_ACTION: |
| fsActionTlv = BgpFsActionTrafficAction.read(actionBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_MARKING: |
| fsActionTlv = BgpFsActionTrafficMarking.read(actionBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_RATE: |
| fsActionTlv = BgpFsActionTrafficRate.read(actionBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_REDIRECT: |
| fsActionTlv = BgpFsActionReDirect.read(actionBuf); |
| break; |
| default: log.debug("Other type Not Supported:" + actionType); |
| break; |
| } |
| if (fsActionTlv != null) { |
| fsActionTlvs.add(fsActionTlv); |
| } |
| } |
| } |
| return new BgpExtendedCommunity(fsActionTlvs); |
| } |
| |
| @Override |
| public short getType() { |
| return TYPE; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(fsActionTlv); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof BgpExtendedCommunity) { |
| BgpExtendedCommunity other = (BgpExtendedCommunity) obj; |
| return Objects.equals(fsActionTlv, other.fsActionTlv); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .omitNullValues() |
| .add("fsActionTlv", fsActionTlv) |
| .toString(); |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| int iLenStartIndex = cb.writerIndex(); |
| ListIterator<BgpValueType> listIterator = fsActionTlv().listIterator(); |
| |
| cb.writeByte(FLAGS); |
| cb.writeByte(getType()); |
| |
| int iActionLenIndex = cb.writerIndex(); |
| cb.writeByte(0); |
| |
| while (listIterator.hasNext()) { |
| BgpValueType fsTlv = listIterator.next(); |
| if (fsTlv.getType() == Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_ACTION) { |
| BgpFsActionTrafficAction trafficAction = (BgpFsActionTrafficAction) fsTlv; |
| trafficAction.write(cb); |
| } else if (fsTlv.getType() == Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_MARKING) { |
| BgpFsActionTrafficMarking trafficMarking = (BgpFsActionTrafficMarking) fsTlv; |
| trafficMarking.write(cb); |
| } else if (fsTlv.getType() == Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_RATE) { |
| BgpFsActionTrafficRate trafficRate = (BgpFsActionTrafficRate) fsTlv; |
| trafficRate.write(cb); |
| } else if (fsTlv.getType() == Constants.BGP_FLOWSPEC_ACTION_TRAFFIC_REDIRECT) { |
| BgpFsActionReDirect trafficRedirect = (BgpFsActionReDirect) fsTlv; |
| trafficRedirect.write(cb); |
| } |
| } |
| |
| int fsActionLen = cb.writerIndex() - iActionLenIndex; |
| cb.setByte(iActionLenIndex, (byte) (fsActionLen - 1)); |
| |
| return cb.writerIndex() - iLenStartIndex; |
| } |
| |
| @Override |
| public int compareTo(Object o) { |
| // TODO Auto-generated method stub |
| return 0; |
| } |
| } |