/// <summary>
/// Receive a packet from the server
/// </summary>
/// <returns>Received packet data</returns>
public Byte[] ReceivePacket()
{
ReliablePacket pReliablePacket = new ReliablePacket();
AcknowlegePacket pAckPacket = new AcknowlegePacket();
Byte[] pData = new Byte[0];
ClusteredPacket pClusteredPacket = new ClusteredPacket();
ChunkBodyPacket pChunkBodyPacket = new ChunkBodyPacket();
ChunkTailPacket pChunkTailPacket = new ChunkTailPacket();
LargeChunkPacket pLargeChunkPacket = new LargeChunkPacket();
// Check if there are any elements on the queue
if (m_pReceiveQueue.Count > 0)
{
// Get the next element from the receive queue
pData = (Byte[])(m_pReceiveQueue.Dequeue());
if (pData != null)
{
// Write the data to the packet loggers
m_packetLogger(PacketDirection.Receive, pData);
// Check if the message is reliable
if (pData[0] == 0x00)
{
switch (pData[1])
{
case 0x03:
// Set the packet information
pReliablePacket.Packet = pData;
// Extract the message
pData = pReliablePacket.Message;
// Increment the reliable receive counter
m_nReliablePacketsReceived++;
// Set the acknowlege transaction identifier and transmit
pAckPacket.TransactionId = pReliablePacket.TransactionId;
TransmitPacket(pAckPacket.Packet);
break;
case 0x04:
// Set the acknowlegement packet data
pAckPacket.Packet = pData;
// Handle the Acknowlege packet
m_reliableMessageHandler.HandleAcknowlegement(pAckPacket.TransactionId);
break;
}
// Check if the packet is a chunk body packet
if ((pData[0] == 0x00) && (pData[1] == 0x08))
{
// Set the chunk data packet
pChunkBodyPacket.Packet = pData;
// Get the message packet from the buffer
pData = pChunkBodyPacket.Message;
// Append the data to the buffer
m_chunkBuffer.Write(pData, 0, pData.Length);
// Clear the returned data
pData = new Byte[0];
}
// Check if the packet is a chunk tail packet
else if ((pData[0] == 0x00) && (pData[1] == 0x09))
{
// Set the chunk data packet
pChunkTailPacket.Packet = pData;
// Get the message packet from the buffer
pData = pChunkTailPacket.Message;
// Append the data to the chunk buffer
m_chunkBuffer.Write(pData, 0, pData.Length);
// return the full data packet
pData = m_chunkBuffer.ToArray();
// Clear the chunk buffer
m_chunkBuffer.Position = 0;
}
// Check if the packet is a large chunk packet
else if ((pData[0] == 0x00) && (pData[1] == 0x0A))
{
// Set the large chunk packet
pLargeChunkPacket.Packet = pData;
// Get the message packet from the buffer
pData = pLargeChunkPacket.Message;
// Append the message to the large buffer
m_largeBuffer.Write(pData, 0, pData.Length);
// Check if the packet is complete
if (m_largeBuffer.Length == pLargeChunkPacket.TotalLength)
{
// return the full data packet
pData = m_largeBuffer.ToArray();
// Clear the chunk buffer
m_largeBuffer.Position = 0;
}
else
{
// Clear the returned data
pData = new Byte[0];
}
}
// Check if the packet is a clustered packet
else if ((pData[0] == 0x00) && (pData[1] == 0x0E))
{
// Set the clustered packet data
pClusteredPacket.Packet = pData;
// Get the enumerator for the packet list
IEnumerator pEnum = pClusteredPacket.Packets.GetEnumerator();
while (pEnum.MoveNext())
{
// Add the next element to the receive queue
m_pReceiveQueue.Enqueue((Byte[])pEnum.Current);
}
// Clear the returned data
pData = new Byte[0];
}
}
}
}
return(pData);
}
/// <summary>
/// Transmit a packet to the server
/// </summary>
/// <param name="pData">packet data</param>
public void TransmitPacket(Byte[] pData)
{
try
{
// Check if the message should be broken up
if (pData.Length > (LargeChunkSize + 12))
{
Int32 nPosition = 0; // Current buffer position
// Check if this is a large message
if (pData.Length > 1000)
{
// Create the large chunk packet
LargeChunkPacket pLargeChunkPacket = new LargeChunkPacket();
// Set the total length of the packet
pLargeChunkPacket.TotalLength = (UInt32)pData.Length;
while (nPosition < pData.Length)
{
// Get the remaining length
Int32 nLength = Math.Min((pData.Length - nPosition), LargeChunkSize);
// Create the message buffer
Byte[] pcMessage = new Byte[nLength];
// Copy the data into the new message buffer
Array.Copy(pData, nPosition, pcMessage, 0, nLength);
// Copy the message data into the Large Chunk packet
pLargeChunkPacket.Message = pcMessage;
// Get the large chunk packet
Byte[] pLargeChunk = pLargeChunkPacket.Packet;
// Write the data to the packet loggers
m_packetLogger(PacketDirection.Transmit, pLargeChunk);
// Add the message to the transmit queue
m_pTransmitQueue.Add(pLargeChunk);
// Increment the current position
nPosition += pcMessage.Length;
}
}
else
{
// Create the chunked data packets
ChunkBodyPacket pChunkBodyPacket = new ChunkBodyPacket();
ChunkTailPacket pChunkTailPacket = new ChunkTailPacket();
while (nPosition < pData.Length)
{
// Get the remaining length
Int32 nLength = Math.Min((pData.Length - nPosition), SmallChunkSize);
// Create the message buffer
Byte[] pcMessage = new Byte[nLength];
// Copy the data into the new message buffer
Array.Copy(pData, nPosition, pcMessage, 0, nLength);
// Increment the current position
nPosition += nLength;
if (pcMessage.Length == SmallChunkSize)
{
// Copy the message data into the Chunk Body packet
pChunkBodyPacket.Message = pcMessage;
Byte[] pChunkBody = pChunkBodyPacket.Packet;
// Write the data to the packet loggers
m_packetLogger(PacketDirection.Transmit, pChunkBody);
// Add the message to the transmit queue
m_pTransmitQueue.Add(pChunkBody);
}
else
{
// Copy the message data into the Chunk Tail packet
pChunkTailPacket.Message = pcMessage;
// Ge the chunk tail packet
Byte[] pChunkTail = pChunkTailPacket.Packet;
// Write the data to the packet loggers
m_packetLogger(PacketDirection.Transmit, pChunkTail);
// Add the message to the transmit queue
m_pTransmitQueue.Add(pChunkTail);
}
}
}
}
else
{
// Write the data to the packet loggers
m_packetLogger(PacketDirection.Transmit, pData);
// Add the data to the end of the queue
m_pTransmitQueue.Add(pData);
}
}
catch (Exception e)
{
Console.WriteLine(e);
}
}
