| /* |
| * Copyright 2015 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.attr; |
| |
| import java.util.Objects; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.bgpio.exceptions.BGPParseException; |
| import org.onosproject.bgpio.types.BGPErrorType; |
| import org.onosproject.bgpio.types.BGPValueType; |
| import org.onosproject.bgpio.util.Validation; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Implements BGP prefix IGP Flag attribute. |
| */ |
| public final class BgpPrefixAttrIgpFlags implements BGPValueType { |
| |
| protected static final Logger log = LoggerFactory |
| .getLogger(BgpPrefixAttrIgpFlags.class); |
| |
| public static final int ATTR_PREFIX_FLAGBIT = 1152; |
| public static final int ATTR_PREFIX_FLAG_LEN = 1; |
| |
| public static final byte FIRST_BIT = (byte) 0x80; |
| public static final byte SECOND_BIT = 0x40; |
| public static final byte THIRD_BIT = 0x20; |
| public static final byte FOURTH_BIT = 0x01; |
| |
| /* Prefix IGP flag bit TLV */ |
| private final boolean bisisUpDownBit; |
| private final boolean bOspfNoUnicastBit; |
| private final boolean bOspfLclAddrBit; |
| private final boolean bOspfNSSABit; |
| |
| /** |
| * Constructor to initialize the value. |
| * |
| * @param bisisUpDownBit IS-IS Up/Down Bit |
| * @param bOspfNoUnicastBit OSPF no unicast Bit |
| * @param bOspfLclAddrBit OSPF local address Bit |
| * @param bOspfNSSABit OSPF propagate NSSA Bit |
| */ |
| BgpPrefixAttrIgpFlags(boolean bisisUpDownBit, |
| boolean bOspfNoUnicastBit, |
| boolean bOspfLclAddrBit, boolean bOspfNSSABit) { |
| this.bisisUpDownBit = bisisUpDownBit; |
| this.bOspfNoUnicastBit = bOspfNoUnicastBit; |
| this.bOspfLclAddrBit = bOspfLclAddrBit; |
| this.bOspfNSSABit = bOspfNSSABit; |
| } |
| |
| /** |
| * Returns object of this class with specified values. |
| * |
| * @param bisisUpDownBit IS-IS Up/Down Bit |
| * @param bOspfNoUnicastBit OSPF no unicast Bit |
| * @param bOspfLclAddrBit OSPF local address Bit |
| * @param bOspfNSSABit OSPF propagate NSSA Bit |
| * @return object of BgpPrefixAttrIGPFlags |
| */ |
| public static BgpPrefixAttrIgpFlags of(final boolean bisisUpDownBit, |
| final boolean bOspfNoUnicastBit, |
| final boolean bOspfLclAddrBit, |
| final boolean bOspfNSSABit) { |
| return new BgpPrefixAttrIgpFlags(bisisUpDownBit, bOspfNoUnicastBit, |
| bOspfLclAddrBit, bOspfNSSABit); |
| } |
| |
| /** |
| * Reads the IGP Flags. |
| * |
| * @param cb ChannelBuffer |
| * @return object of BgpPrefixAttrIGPFlags |
| * @throws BGPParseException while parsing BgpPrefixAttrIGPFlags |
| */ |
| public static BgpPrefixAttrIgpFlags read(ChannelBuffer cb) |
| throws BGPParseException { |
| boolean bisisUpDownBit = false; |
| boolean bOspfNoUnicastBit = false; |
| boolean bOspfLclAddrBit = false; |
| boolean bOspfNSSABit = false; |
| |
| short lsAttrLength = cb.readShort(); |
| |
| if ((lsAttrLength != ATTR_PREFIX_FLAG_LEN) |
| || (cb.readableBytes() < lsAttrLength)) { |
| Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR, |
| BGPErrorType.ATTRIBUTE_LENGTH_ERROR, |
| lsAttrLength); |
| } |
| |
| byte nodeFlagBits = cb.readByte(); |
| |
| bisisUpDownBit = ((nodeFlagBits & FIRST_BIT) == FIRST_BIT); |
| bOspfNoUnicastBit = ((nodeFlagBits & SECOND_BIT) == SECOND_BIT); |
| bOspfLclAddrBit = ((nodeFlagBits & THIRD_BIT) == THIRD_BIT); |
| bOspfNSSABit = ((nodeFlagBits & FOURTH_BIT) == FOURTH_BIT); |
| |
| return BgpPrefixAttrIgpFlags.of(bisisUpDownBit, bOspfNoUnicastBit, |
| bOspfLclAddrBit, bOspfNSSABit); |
| } |
| |
| /** |
| * Returns the IS-IS Up/Down Bit set or not. |
| * |
| * @return IS-IS Up/Down Bit set or not |
| */ |
| public boolean isisUpDownBit() { |
| return bisisUpDownBit; |
| } |
| |
| /** |
| * Returns the OSPF no unicast Bit set or not. |
| * |
| * @return OSPF no unicast Bit set or not |
| */ |
| public boolean ospfNoUnicastBit() { |
| return bOspfNoUnicastBit; |
| } |
| |
| /** |
| * Returns the OSPF local address Bit set or not. |
| * |
| * @return OSPF local address Bit set or not |
| */ |
| public boolean ospfLclAddrBit() { |
| return bOspfLclAddrBit; |
| } |
| |
| /** |
| * Returns the OSPF propagate NSSA Bit set or not. |
| * |
| * @return OSPF propagate NSSA Bit set or not |
| */ |
| public boolean ospfNSSABit() { |
| return bOspfNSSABit; |
| } |
| |
| @Override |
| public short getType() { |
| return ATTR_PREFIX_FLAGBIT; |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| // TODO This will be implemented in the next version |
| return 0; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(bisisUpDownBit, bOspfNoUnicastBit, bOspfLclAddrBit, |
| bOspfNSSABit); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (obj instanceof BgpPrefixAttrIgpFlags) { |
| BgpPrefixAttrIgpFlags other = (BgpPrefixAttrIgpFlags) obj; |
| return Objects.equals(bisisUpDownBit, other.bisisUpDownBit) |
| && Objects.equals(bOspfNoUnicastBit, |
| other.bOspfNoUnicastBit) |
| && Objects.equals(bOspfLclAddrBit, other.bOspfLclAddrBit) |
| && Objects.equals(bOspfNSSABit, other.bOspfNSSABit); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("bisisUpDownBit", bisisUpDownBit) |
| .add("bOspfNoUnicastBit", bOspfNoUnicastBit) |
| .add("bOspfLclAddrBit", bOspfLclAddrBit) |
| .add("bOspfNSSABit", bOspfNSSABit).toString(); |
| } |
| } |