/// <summary>
/// Called when client is reading data.
/// </summary>
public int Recv(long socket, byte[] buff, int len, int flags)
{
CommunicationManager.CheckThread();
lock (CommunicationManager.SyncRoot)
{
if (socket != this.socket)
{
throw new ArgumentException("socket");
}
// This shouldn't happen
if (len > buff.Length)
{
len = buff.Length;
}
ReceiveData();
if (!DataAvailable || len == 0)
{
return(0);
}
lock (sendSync)
{
int offset = 0;
while (toClientBuffer.Count > 0 && offset < len)
{
byte[] data = toClientBuffer[0];
toClientBuffer.RemoveAt(0);
int spaceLeft = len - offset;
int dataPart = Math.Min(data.Length, spaceLeft);
Array.Copy(data, 0, buff, offset, dataPart);
offset += dataPart;
if (dataPart < data.Length)
{
System.Diagnostics.Debug.Print("!!Sending part message to client!!");
int left = data.Length - dataPart;
byte[] dataLeft = new byte[left];
Array.Copy(data, dataPart, dataLeft, 0, left);
toClientBuffer.Insert(0, dataLeft);
}
}
return(offset);
}
}
}
/// <summary>
/// Called when client is sending data to server
/// </summary>
public int Send(long socket, byte[] buff, int len, int flags)
{
CommunicationManager.CheckThread();
lock (CommunicationManager.SyncRoot)
{
if (socket != this.socket)
{
throw new ArgumentException("socket");
}
int buffLen = len;
// Process predefined messages
while (len > 0 && predefinedClientMsgs != null && clientMsgIndex < predefinedClientMsgs.Length)
{
if (fromClientBuffer != null)
{
throw new SocketException("Trying to read predefined message but there are unprocessed data in buffer.", this, buff);
}
int msgLen = predefinedClientMsgs[clientMsgIndex];
int newLen = len - msgLen;
if (newLen < 0)
{
throw new SocketException("Part predefined messages are not supported.", this, buff);
}
byte[] msg = new byte[msgLen];
Array.Copy(buff, msg, msgLen);
byte[] newBuf = new byte[newLen];
Array.Copy(buff, msgLen, newBuf, 0, newLen);
len = newLen;
byte[] decryptedBuffer = clientEncryption.Decrypt(msg, msgLen);
ProcessMessages(decryptedBuffer, false);
}
if (len > 0)
{
byte[] decryptedBuffer = clientEncryption.Decrypt(buff, len);
ProcessMessages(decryptedBuffer, false);
}
SendData();
return(buffLen);
}
}
public void SendData()
{
CommunicationManager.CheckThread();
lock (CommunicationManager.SyncRoot)
{
lock (sendSync)
{
while (toServerBuffer.Count > 0)
{
InternalSendToServer(toServerBuffer[0]);
toServerBuffer.RemoveAt(0);
}
}
}
}
/// <summary>
/// Reads data from server.
/// </summary>
public void ReceiveData()
{
CommunicationManager.CheckThread();
lock (CommunicationManager.SyncRoot)
{
const int BuffLen = 65536;
byte[] encryptedBuffer = new byte[BuffLen];
int readBytes = WinSock.recv(socket, encryptedBuffer, BuffLen, 0);
if (readBytes > 0)
{
CommunicationManager.BandwidthManager.Download(readBytes);
byte[] decryptedBuffer = serverEncryption.Decrypt(encryptedBuffer, readBytes);
ProcessMessages(decryptedBuffer, true);
}
}
}
/// <summary>
/// Can be created only from main thread.
/// </summary>
public UltimaSocket(long s, uint addr, int port)
{
CommunicationManager.CheckThread();
socket = s;
address = addr;
this.port = port;
clientMsgIndex = 0;
predefinedClientMsgs = null;
seed = 0;
// No encryption
clientEncryption = new Encryption(new NoEncryption(), new NoEncryption());
serverEncryption = new Encryption(new NoEncryption(), new NoEncryption());
toClientBuffer = new List <byte[]>();
toServerBuffer = new List <byte[]>();
fromClientBuffer = null;
fromServerBuffer = null;
}
