/// <summary>
/// Validates buffer capacity before writing into it.
/// </summary>
/// <param name="nextValueLength">length of next bytes sequence to write into buffer.</param>
private void ValidateBufferSize(int nextValueLength)
{
if ((_mOffset + nextValueLength) > _mBuffer.Length)
{
L2Buffer.Extend(ref _mBuffer, nextValueLength + MDefaultOverflowValue);
}
}
/// <summary>
/// Receive <see cref="AsyncCallback"/> method.
/// </summary>
/// <exception cref="InvalidOperationException" />
protected override unsafe void ReceiveCallback(IAsyncResult ar)
{
try
{
MReceivedLength += MSocket.EndReceive(ar);
fixed(byte *buf = MReceiveBuffer)
{
if (!MHeaderReceived) //get packet capacity
{
L2Buffer.Extend(ref MReceiveBuffer, 0, *(int *)buf - sizeof(int));
MReceivedLength = 0;
MHeaderReceived = true;
}
if (MReceivedLength == MReceiveBuffer.Length) // all data received
{
Handle(new Packet(2, MReceiveBuffer));
MReceivedLength = 0;
MReceiveBuffer = MDefaultBuffer;
MHeaderReceived = false;
MSocket.BeginReceive(MReceiveBuffer, 0, 4, 0, ReceiveCallback, null);
}
else
{
if (MReceivedLength < MReceiveBuffer.Length) // not all data received
{
MSocket.BeginReceive(MReceiveBuffer, MReceivedLength, MReceiveBuffer.Length - MReceivedLength, 0, MReceiveCallback, null);
}
else
{
throw new InvalidOperationException();
}
}
}
}
catch (SocketException se)
{
Log.Info(string.Format("{0} \r\nError code: {1}", se.ToString(), se.ErrorCode));
CloseConnection();
OnDisconnected?.Invoke(se.ErrorCode, this, ConnectionId);
}
catch (Exception e)
{
Log.Error(e);
CloseConnection();
OnDisconnected?.Invoke(-1, this, ConnectionId);
}
}
/// <summary>
/// Receive method.
/// </summary> //72-2min
protected override unsafe void ReceiveCallback(IAsyncResult ar)
{
try
{
m_ReceivedLength += m_Socket.EndReceive(ar);
//Logger.WriteLine(Source.Debug, "m_ReceivedLength == {0}", m_ReceivedLength);
if (m_ReceivedLength == 0)
{
BeginReceive();
return;
}
fixed(byte *buf = m_ReceiveBuffer)
{
if (!m_HeaderReceived) //get packet capacity
{
L2Buffer.Extend(ref m_ReceiveBuffer, 0, *(( short * )(buf)) - sizeof(short));
m_ReceivedLength = 0;
m_HeaderReceived = true;
}
if (m_ReceivedLength == m_ReceiveBuffer.Length) // all data received
{
m_Crypt.Decrypt(ref m_ReceiveBuffer, 0, m_ReceiveBuffer.Length);
Handle(new Packet(1, m_ReceiveBuffer));
m_ReceivedLength = 0;
m_ReceiveBuffer = m_DefaultBuffer;
m_HeaderReceived = false;
m_Socket.BeginReceive(m_ReceiveBuffer, 0, 0, 0, ReceiveCallback, null);
}
else if (m_ReceivedLength < m_ReceiveBuffer.Length) // not all data received
{
m_Socket.BeginReceive(m_ReceiveBuffer, m_ReceivedLength, m_ReceiveBuffer.Length - m_ReceivedLength, 0, m_ReceiveCallback, null);
}
else
{
throw new InvalidOperationException();
}
}
}
catch (Exception e)
{
//if ( e is NullReferenceException ) // user closed connection
//{
// UserConnectionsListener.RemoveFromActiveConnections(this);
// return;
//}
Logger.Exception(e);
}
}
/// <summary>
/// Resizes <see cref="Packet"/> buffer to it's actual capacity and appends buffer length to the beginning of <see cref="Packet"/> buffer.
/// </summary>
/// <param name="headerSize"><see cref="Packet"/> header (opcodes) capacity.</param>
public unsafe void Prepare(int headerSize)
{
_mOffset += headerSize;
L2Buffer.Extend(ref _mBuffer, headerSize, _mOffset);
fixed(byte *buf = _mBuffer)
{
if (headerSize == sizeof(short))
{
*(short *)buf = (short)_mOffset;
}
else
{
*(int *)buf = _mOffset;
}
}
}
/// <summary>
/// Session start method override, instead usual ReceiveCallback.
/// </summary>
private unsafe void SessionReceiveCallback(IAsyncResult ar)
{
try
{
m_ReceivedLength += m_Socket.EndReceive(ar);
fixed(byte *buf = m_ReceiveBuffer)
{
//Logger.WriteLine(Source.Debug, "Recieve :\r\n{0}", L2Buffer.ToString(m_ReceiveBuffer));
if (!m_HeaderReceived) //get packet capacity
{
L2Buffer.Extend(ref m_ReceiveBuffer, 0, *(( short * )(buf)) - sizeof(short));
m_ReceivedLength = 0;
m_HeaderReceived = true;
}
if (m_ReceivedLength == m_ReceiveBuffer.Length) // all data received
{
Handle(new Packet(1, m_ReceiveBuffer));
m_ReceivedLength = 0;
m_ReceiveBuffer = m_DefaultBuffer;
m_HeaderReceived = false;
m_Socket.BeginReceive(m_ReceiveBuffer, 0, 2, 0, ReceiveCallback, null);
}
else if (m_ReceivedLength < m_ReceiveBuffer.Length) // not all data received
{
m_Socket.BeginReceive(m_ReceiveBuffer, m_ReceivedLength, m_ReceiveBuffer.Length - m_ReceivedLength, 0, SessionReceiveCallback, null);
}
else
{
throw new InvalidOperationException();
}
}
}
catch (Exception e)
{
Logger.Exception(e);
}
}
/// <summary>
/// Receive <see cref="AsyncCallback"/> method.
/// </summary>
/// <exception cref="InvalidOperationException" />
protected override unsafe void ReceiveCallback(IAsyncResult ar)
{
try
{
m_ReceivedLength += m_Socket.EndReceive(ar);
fixed(byte *buf = m_ReceiveBuffer)
{
if (!m_HeaderReceived) //get packet capacity
{
L2Buffer.Extend(ref m_ReceiveBuffer, 0, *(( int * )(buf)) - sizeof(int));
m_ReceivedLength = 0;
m_HeaderReceived = true;
}
if (m_ReceivedLength == m_ReceiveBuffer.Length) // all data received
{
Handle(new Packet(2, m_ReceiveBuffer));
m_ReceivedLength = 0;
m_ReceiveBuffer = m_DefaultBuffer;
m_HeaderReceived = false;
m_Socket.BeginReceive(m_ReceiveBuffer, 0, 4, 0, ReceiveCallback, null);
}
else if (m_ReceivedLength < m_ReceiveBuffer.Length) // not all data received
{
m_Socket.BeginReceive(m_ReceiveBuffer, m_ReceivedLength, m_ReceiveBuffer.Length - m_ReceivedLength, 0, m_ReceiveCallback, null);
}
else
{
throw new InvalidOperationException();
}
}
}
catch (SocketException se)
{
if (OnDisconnected != null)
{
OnDisconnected(se.ErrorCode, this, ConnectionID);
}
else
{
Logger.WriteLine(Source.InnerNetwork, "{0} \r\nError code: {1}", se.ToString(), se.ErrorCode);
CloseConnection();
}
}
catch (Exception e)
{
Logger.Exception(e);
if (OnDisconnected != null)
{
OnDisconnected(-1, this, ConnectionID);
}
else
{
CloseConnection();
}
}
}
