/**
* create the right type of control packet based on the packet data
* @param packetData
* @return
*/
public static ControlPacket createControlPacket(byte[] encodedData, int length)
{
ControlPacket packet = null;
int pktType = PacketUtil.decodeType(encodedData, 0);
long additionalInfo = PacketUtil.decode(encodedData, 4);
long timeStamp = PacketUtil.decode(encodedData, 8);
long destID = PacketUtil.decode(encodedData, 12);
byte[] controlInformation = new byte[length - 16];
Array.Copy(encodedData, 16, controlInformation, 0, controlInformation.Length);
//TYPE 0000:0
if ((int)ControlPacket.ControlPacketType.CONNECTION_HANDSHAKE == pktType)
{
packet = new ConnectionHandshake(controlInformation);
}
//TYPE 0001:1
else if ((int)ControlPacket.ControlPacketType.KEEP_ALIVE == pktType)
{
packet = new KeepAlive();
}
//TYPE 0010:2
else if ((int)ControlPacket.ControlPacketType.ACK == pktType)
{
packet = new Acknowledgement(additionalInfo, controlInformation);
}
//TYPE 0011:3
else if ((int)ControlPacket.ControlPacketType.NAK == pktType)
{
packet = new NegativeAcknowledgement(controlInformation);
}
//TYPE 0101:5
else if ((int)ControlPacket.ControlPacketType.SHUTDOWN == pktType)
{
packet = new Shutdown();
}
//TYPE 0110:6
else if ((int)ControlPacket.ControlPacketType.ACK2 == pktType)
{
packet = new Acknowledgment2(additionalInfo, controlInformation);
}
//TYPE 0111:7
else if ((int)ControlPacket.ControlPacketType.MESSAGE_DROP_REQUEST == pktType)
{
packet = new MessageDropRequest(controlInformation);
}
//TYPE 1111:8
else if ((int)ControlPacket.ControlPacketType.USER_DEFINED == pktType)
{
packet = new UserDefined(controlInformation);
}
if (packet != null)
{
packet.setTimeStamp(timeStamp);
packet.setDestinationID(destID);
}
return(packet);
}
public override bool equals(Object obj)
{
if (this == obj)
{
return(true);
}
if (!base.equals(obj))
{
return(false);
}
if (this.GetType() != obj.GetType())
{
return(false);
}
ConnectionHandshake other = (ConnectionHandshake)obj;
if (connectionType != other.connectionType)
{
return(false);
}
if (initialSeqNo != other.initialSeqNo)
{
return(false);
}
if (maxFlowWndSize != other.maxFlowWndSize)
{
return(false);
}
if (packetSize != other.packetSize)
{
return(false);
}
if (socketID != other.socketID)
{
return(false);
}
if (socketType != other.socketType)
{
return(false);
}
if (udtVersion != other.udtVersion)
{
return(false);
}
return(true);
}
