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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.onlab.packet.pim;
import org.onlab.packet.DeserializationException;
import java.nio.ByteBuffer;
import java.text.MessageFormat;
import static org.onlab.packet.PacketUtils.checkBufferLength;
import static org.onlab.packet.PacketUtils.checkInput;
public class PIMHelloOption {
/**
* PIM Option types.
*/
public static final short OPT_HOLDTIME = 1;
public static final short OPT_PRUNEDELAY = 2;
public static final short OPT_PRIORITY = 19;
public static final short OPT_GENID = 20;
public static final short OPT_ADDRLIST = 24;
public static final short DEFAULT_HOLDTIME = 105;
public static final int DEFAULT_PRUNEDELAY = 2000; // 2,000 ms
public static final int DEFAULT_PRIORITY = 1;
public static final int DEFAULT_GENID = 0;
public static final int MINIMUM_OPTION_LEN_BYTES = 4;
// Values for this particular hello option.
private short optType;
private short optLength;
private byte[] optValue;
public PIMHelloOption() {
}
/**
* Set a PIM Hello option by type. The length and default value of the
* type will be auto filled in by default.
*
* @param type hello option type
*/
public PIMHelloOption(short type) {
this.optType = type;
switch (type) {
case OPT_HOLDTIME:
this.optLength = 2;
this.optValue = new byte[optLength];
ByteBuffer.wrap(this.optValue).putShort(PIMHelloOption.DEFAULT_HOLDTIME);
break;
case OPT_PRUNEDELAY:
this.optLength = 4;
this.optValue = new byte[this.optLength];
ByteBuffer.wrap(this.optValue).putInt(PIMHelloOption.DEFAULT_PRUNEDELAY);
break;
case OPT_PRIORITY:
this.optLength = 4;
this.optValue = new byte[this.optLength];
ByteBuffer.wrap(this.optValue).putInt(PIMHelloOption.DEFAULT_PRIORITY);
break;
case OPT_GENID:
this.optLength = 4;
this.optValue = new byte[this.optLength];
ByteBuffer.wrap(this.optValue).putInt(PIMHelloOption.DEFAULT_GENID);
break;
case OPT_ADDRLIST:
this.optLength = 0; // We don't know what the length will be yet.
this.optValue = null;
default:
//log.error("Unkown option type: " + type + "\n" );
return;
}
}
public void setOptType(short type) {
this.optType = type;
}
public short getOptType() {
return this.optType;
}
public void setOptLength(short len) {
this.optLength = len;
}
public short getOptLength() {
return this.optLength;
}
public void setValue(ByteBuffer bb) throws DeserializationException {
this.optValue = new byte[this.optLength];
bb.get(this.optValue, 0, this.optLength);
}
public byte[] getValue() {
return this.optValue;
}
public static PIMHelloOption deserialize(ByteBuffer bb) throws DeserializationException {
checkInput(bb.array(), bb.position(), bb.limit() - bb.position(), 4);
PIMHelloOption opt = new PIMHelloOption();
opt.setOptType(bb.getShort());
opt.setOptLength(bb.getShort());
checkBufferLength(bb.limit(), bb.position(), opt.getOptLength());
opt.setValue(bb);
return opt;
}
public byte [] serialize() {
int len = 4 + this.optLength;
ByteBuffer bb = ByteBuffer.allocate(len);
bb.putShort(this.optType);
bb.putShort(this.optLength);
bb.put(this.optValue);
return bb.array();
}
public String toString() {
return MessageFormat.format("Type: {0}, len: {1} value: {2}", this.optType, this.optLength,
(this.optValue == null) ? "null" : this.optValue.toString());
}
}
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