private void ReadCallback(IAsyncResult ar)
{
// Retrieve the state object and the handler socket
// from the asynchronous state object.
var state = (StateObject)ar.AsyncState;
var handler = state.WorkSocket;
int bytesRead;
try
{
// Read data from the client socket.
bytesRead = handler.EndReceive(ar);
}
catch (SocketException)
{
ClearLine();
RemovePhone(_phoneNumber);
return;
}
catch (ObjectDisposedException)
{
ClearLine();
RemovePhone(_phoneNumber);
return;
}
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.Sb.Append(Encoding.ASCII.GetString(
state.Buffer, 0, bytesRead));
// Check for end-of-file tag. If it is not there, read
// more data.
var content = state.Sb.ToString();
var index = content.IndexOf("<EOF>", StringComparison.Ordinal);
if (index != -1)
{
state.Sb = new StringBuilder();
string command = content.Substring(0, index);
if (command == "disconnect")
{
ClearLine();
handler.Shutdown(SocketShutdown.Both);
handler.Disconnect(false);
RemovePhone(_phoneNumber);
return;
}
if (command.StartsWith("dial,"))
{
var parts = command.Split(new[] { ',' });
var lineNumber = int.Parse(parts[1]);
// line should equal null the first dial
if (_line == null)
{
_line = (SimulatorLine)(new Simulator().GetLine(lineNumber));
_line.SubscribeToHangup(HandleHangup);
}
switch (_line.Status)
{
case LineStatusTypes.OnHook:
Send("idle");
_line.UnsubscribeToHangup(HandleHangup);
_line = null;
break;
case LineStatusTypes.Connected:
Send("busy");
_line.UnsubscribeToHangup(HandleHangup);
_line = null;
break;
case LineStatusTypes.AcceptingCalls:
var status = _line.SendRing();
switch (status)
{
case LineStatusTypes.AcceptingCalls:
Send("ring");
break;
case LineStatusTypes.Connected:
Send("answered");
break;
}
break;
}
}
else if (command == "hangup")
{
ClearLine();
}
else if (command.StartsWith("dialoutResponse,"))
{
var parts = command.Split(new[] { ',' });
var subCommand = parts[1];
switch (subCommand)
{
case "Busy":
_dialAnalysis = CallAnalysis.Busy;
break;
case "Ignore":
_dialAnalysis = CallAnalysis.NoAnswer;
break;
case "Answering Machine":
_dialAnalysis = CallAnalysis.AnsweringMachine;
break;
case "No Dial Tone":
_dialAnalysis = CallAnalysis.NoDialTone;
break;
case "Answer":
_dialAnalysis = CallAnalysis.Connected;
break;
default:
_dialAnalysis = CallAnalysis.Error;
break;
}
lock (_dialoutLock)
{
Monitor.Pulse(_dialoutLock);
}
}
else if (command.Length == 1)
{
_line.SendDigit(char.Parse(command));
}
else
{
// echo the command back
Send(command);
}
}
// read more or wait for the next command to come in
handler.BeginReceive(state.Buffer, 0, StateObject.BufferSize, 0,
ReadCallback, state);
}
}
private void btnDial_Click(object sender, EventArgs e)
{
CallAnalysis result = line.Dial(txtPhoneNumber.Text, 3500);
Console.WriteLine(result);
}
