/// <summary>
/// Internal connect operation
/// </summary>
private void InternalConnect()
{
Commands.Clear();
SetSocketStatus(SocketStatus.Connecting);
IPEndPoint host = new IPEndPoint(IPAddress.Parse(Server), Port);
_Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
_Socket.Connect(host);
if (_Socket.Connected)
{
_SocketReader.Socket = _Socket;
_SocketReader.Timeout = ConnectingTimeout;
_SocketReader.SleepTime = 10;
if (_SocketReader.Read() == SocketReader.ReadStatus.Success &&
_SocketReader.Type == SocketReader.ReadType.Response &&
_SocketReader.CommandId == -1)
{
var response = NetResponse.Parse(_SocketReader.Data);
if (response.Okey)
{
var hash = response.Parameters["hash"] as ParameterInt32;
HashCode = hash.Value;
SetSocketStatus(SocketStatus.Connected);
_ProcessFlag = true;
ConnectTime = DateTime.Now;
ProcessOperation();
}
else
{
_Socket.Shutdown(SocketShutdown.Both);
_Socket.Close();
SetSocketStatus(SocketStatus.None);
}
}
else
{
_Socket.Shutdown(SocketShutdown.Both);
_Socket.Close();
SetSocketStatus(SocketStatus.None);
}
}
else
{
SetSocketStatus(SocketStatus.None);
}
}
catch //(Exception exception)
{
if (_Socket != null && _Socket.Connected)
{
_Socket.Shutdown(SocketShutdown.Both);
_Socket.Close();
}
SetSocketStatus(SocketStatus.Error);
}
}
/// <summary>
/// Listen and process messages
/// </summary>
private void ProcessOperation()
{
var lastCommandDate = DateTime.Now;
var time = 0;
_SocketReader.Clear();
_SocketReader.SleepTime = 5;
_SocketReader.Socket = _Socket;
_SocketReader.Timeout = CommandTimeout;
NetResponse response = null;
try
{
while (_ProcessFlag)
{
response = null;
if (_Socket.Available > 0)
{
OnBeginReceiveData();
_SocketReader.Clear();
_SocketReader.Read();
OnEndReceiveData();
if (_SocketReader.LastStatus == SocketReader.ReadStatus.Success)
{
if (_SocketReader.Type == SocketReader.ReadType.Command)
{
NetCommand command = NetCommand.Parse(_SocketReader.Data);
command.Id = _SocketReader.CommandId;
ServerCommandsManager.PublishCommandExecute(command);
command.Status = CommandStatus.Executed;
if (command.Response == null)
{
command.Response = new NetResponse(false, "Server command could not be executed");
}
Send(command.Response);
}
else
{
var command = _SendCommands[_SocketReader.CommandId] as NetCommand;
if (command == null)
{
OnUnknownServerData();
}
else
{
response = NetResponse.Parse(_SocketReader.Data);
command.Response = response;
command.Status = CommandStatus.Executed;
CommandExecutionManager.PublishCommandExecute(command);
_SendCommands.Remove(command.Id);
}
}
}
else
{
Disconnect();
}
lastCommandDate = DateTime.Now;
}
else
{
NetCommand active = null;
for (int k = 0; k < Commands.Count; k++)
{
NetCommand cd = Commands[k, true];
if (cd.Status == CommandStatus.Waiting)
{
active = cd;
break;
}
}
if (active != null)
{
Commands.Active = active;
OnBeginSendingData();
Send(active);
OnEndSendingData();
_SendCommands.Add(active.Id, active);
}
else
{
time = Convert.ToInt32(DateTime.Now.Subtract(lastCommandDate).TotalMilliseconds);
if (KeepConnection && time >= NoopPeriod)
{
Commands.Add(new NetCommand(CommandNames.NOOP));
}
else
{
if (time > ConnectionTimeout)
{
break;
}
}
Thread.Sleep(10);
}
}
}
}
catch (SocketException ex)
{
if (ex.NativeErrorCode != 0x2745 && ex.NativeErrorCode != 0x2714)
{
throw ex;
}
}
catch (Exception ex)
{
OnSystemError(ex);
}
finally
{
Disconnect();
}
}
/// <summary>
/// Process client operations
/// </summary>
private void ClientProcess()
{
DateTime lastCommandDate = DateTime.Now;
_SocketReader.Socket = Socket;
_SocketReader.SleepTime = 5; // 5 ms
_SocketReader.Timeout = Server.CommandTimeout;
_BadCommandCount = 0;
try {
// send welcome message to the client
var response = new NetResponse(true, "Server is ready at " + DateTime.Now.ToString("yyyyMMdd HH:mm:ss"));
response.CommandId = -1;
response.Parameters.Add(new ParameterInt32("hash", Guid.GetHashCode()));
Send(response);
Server.OnClientConnected(this);
double time = 0;
response = null;
bool badcommand = false;
NetCommand command = null;
while (_IsOnProcess)
{
response = null;
badcommand = false;
command = null;
if (Socket.Available > 0)
{
_SocketReader.Clear();
_SocketReader.Read();
lastCommandDate = DateTime.Now;
if (_SocketReader.LastStatus == SocketReader.ReadStatus.Success)
{
try {
if (_SocketReader.Type == SocketReader.ReadType.Command)
{
command = NetCommand.Parse(_SocketReader.Data);
command.Id = _SocketReader.CommandId;
CommandOperationEventArgs e = new CommandOperationEventArgs(command);
OnNewCommand(e);
if (!e.Handled)
{
badcommand = true;
}
}
else
{
command = _SendedCommands[_SocketReader.CommandId]
as NetCommand;
if (command != null)
{
response = NetResponse.Parse(_SocketReader.Data);
response.CommandId = _SocketReader.CommandId;
command.Response = response;
command.Status = CommandStatus.Executed;
_SendedCommands.Remove(command.Id);
}
}
}
catch (Exception exception) {
Server.OnSystemError(exception);
badcommand = true;
}
if (badcommand)
{
_BadCommandCount++;
if (_SocketReader.Type == SocketReader.ReadType.Command)
{
if (command != null)
{
response = new NetResponse(false, "Bad command");
command.Response = response;
Send(response);
command.Status = CommandStatus.Executed;
}
}
else
{
command = _SendedCommands[response.CommandId]
as NetCommand;
if (command != null)
{
command.Response = new NetResponse(false, "Bad command");
command.Status = CommandStatus.Executed;
_SendedCommands.Remove(command.Id);
}
}
if (_BadCommandCount > Server.BadCommandCount)
{
response = new NetResponse(false, "Because of too much bad commands your connection will be terminated");
Send(response);
break;
}
}
}
else
{
switch (_SocketReader.LastStatus)
{
case SocketReader.ReadStatus.Exception:
response = new NetResponse(false, "Socket reading exception");
Send(response);
break;
case SocketReader.ReadStatus.Timeout:
response = new NetResponse(false, "Timeout");
Send(response);
break;
default:
response = new NetResponse(false, "Unknow socket reading exception");
Send(response);
break;
}
}
}
else
{
NetCommand active = null;
for (int k = 0; k < Commands.Count; k++)
{
NetCommand cd = Commands[k, true];
if (cd.Status == CommandStatus.Waiting)
{
active = cd;
break;
}
}
if (active != null)
{
active.Status = CommandStatus.SendingToTarget;
Send(active);
_SendedCommands.Add(active.Id, active);
active.Status = CommandStatus.WaitingForResponse;
}
else
{
time = DateTime.Now.Subtract(lastCommandDate).TotalMilliseconds;
if (time > Server.ConnectionTimeout)
{
response = new NetResponse(false, "Connection is timeout");
Send(response);
Disconnect();
break;
}
Thread.Sleep(10);
}
}
}
}
catch (SocketException ex)
{
if (ex.NativeErrorCode == 0x2745)
{
// connection close by remote host is not an exception (client might be closed)
}
else if (ex.NativeErrorCode != 0x2714) // WSACancelBlockCall (We might close)
{
Server.OnSystemError(new Exception(string.Format("Socket exception in Client {0}", Guid.ToString("N")), ex));
}
}
catch (Exception ex) {
Server.OnSystemError(new Exception(string.Format("Exception in Client {0}", Guid.ToString("N")), ex));
}
finally{
Disconnect();
}
}
