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/*
* 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 attribute Max Link bandwidth.
*/
public final class BgpLinkAttrMaxLinkBandwidth implements BGPValueType {
protected static final Logger log = LoggerFactory
.getLogger(BgpLinkAttrMaxLinkBandwidth.class);
public static final int MAX_BANDWIDTH_LEN = 4;
public static final int NO_OF_BITS = 8;
public short type;
/* ISIS administrative group */
private final float maxBandwidth;
/**
* Constructor to initialize the values.
*
* @param maxBandwidth Maximum link bandwidth.
* @param type TLV type
*/
private BgpLinkAttrMaxLinkBandwidth(float maxBandwidth, short type) {
this.maxBandwidth = maxBandwidth;
this.type = type;
}
/**
* Returns object of this class with specified values.
*
* @param maxBandwidth Maximum link bandwidth.
* @param type TLV type
* @return object of BgpLinkAttrMaxLinkBandwidth
*/
public static BgpLinkAttrMaxLinkBandwidth of(final float maxBandwidth,
final short type) {
return new BgpLinkAttrMaxLinkBandwidth(maxBandwidth, type);
}
/**
* Reads the BGP link attributes of Maximum link bandwidth.
*
* @param cb Channel buffer
* @param type type of this tlv
* @return object of type BgpLinkAttrMaxLinkBandwidth
* @throws BGPParseException while parsing BgpLinkAttrMaxLinkBandwidth
*/
public static BgpLinkAttrMaxLinkBandwidth read(ChannelBuffer cb, short type)
throws BGPParseException {
float maxBandwidth;
short lsAttrLength = cb.readShort();
if ((lsAttrLength != MAX_BANDWIDTH_LEN)
|| (cb.readableBytes() < lsAttrLength)) {
Validation.validateLen(BGPErrorType.UPDATE_MESSAGE_ERROR,
BGPErrorType.ATTRIBUTE_LENGTH_ERROR,
lsAttrLength);
}
maxBandwidth = ieeeToFloatRead(cb.readInt()) * NO_OF_BITS;
return BgpLinkAttrMaxLinkBandwidth.of(maxBandwidth, type);
}
/**
* Returns Maximum link bandwidth.
*
* @return Maximum link bandwidth
*/
float linkAttrMaxLinkBandwidth() {
return maxBandwidth;
}
/**
* Parse the IEEE floating point notation and returns it in normal float.
*
* @param iVal IEEE floating point number
* @return normal float
*/
static float ieeeToFloatRead(int iVal) {
iVal = (((iVal & 0xFF) << 24) | ((iVal & 0xFF00) << 8)
| ((iVal & 0xFF0000) >> 8) | ((iVal >> 24) & 0xFF));
return Float.intBitsToFloat(iVal);
}
@Override
public short getType() {
return this.type;
}
@Override
public int hashCode() {
return Objects.hash(maxBandwidth);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof BgpLinkAttrMaxLinkBandwidth) {
BgpLinkAttrMaxLinkBandwidth other = (BgpLinkAttrMaxLinkBandwidth) obj;
return Objects.equals(maxBandwidth, other.maxBandwidth);
}
return false;
}
@Override
public int write(ChannelBuffer cb) {
// TODO This will be implemented in the next version
return 0;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("maxBandwidth", maxBandwidth).toString();
}
}
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