private void OnRecievedData(IAsyncResult ar)
{
// Socket was the passed in object
Socket sock = (Socket)ar.AsyncState;
// Check if we got any data
bytesRecv += sock.EndReceive(ar);
if (currentCommand == null && bytesRecv < 5)
{
sock.BeginReceive(readBuffer, bytesRecv, readBuffer.Length - bytesRecv, SocketFlags.None, OnRecievedData, sock);
return;
}
else
{
if (currentCommand == null)
{
var tagId = BitConverter.ToInt32(readBuffer, 1);
if (!pendingCommands.TryGetValue(tagId, out currentCommand))
{
throw new InvalidOperationException("Unexpected command response.");
}
}
if (bytesRecv - 1 >= currentCommand.Response.Length)
{
var response = currentCommand.Response;
var userState = currentCommand.UserState;
for (int count = 0; count < currentCommand.Response.Length; count++)
{
currentCommand.Response[count] = readBuffer[count + 1];
}
var tagId = BitConverter.ToInt32(readBuffer, 1);
lock (pendingCommands)
{
pendingCommands.Remove(tagId);
}
currentCommand = null;
OnCommandCompleted(new UbisenseCommandCompletedEventArgs(tagId, response, null, false, userState));
bytesRecv = 0;
}
}
sock.BeginReceive(readBuffer, bytesRecv, readBuffer.Length - bytesRecv, SocketFlags.None, OnRecievedData, sock);
}
public void CommandAsync(byte[] command, int responseSize, object userState)
{
if (command == null)
{
throw new ArgumentNullException("command");
}
if (command.Length < 1)
{
throw new ArgumentException("Command bytes must not be empty.");
}
var code = command[0];
var tagId = BitConverter.ToInt32(command, 1);
var response = new byte[responseSize];
var pendingCommand = new UbisensePendingCommand(tagId, response, userState);
lock (pendingCommands)
{
pendingCommands.Add(tagId, pendingCommand);
}
communicationSocket.Send(command, 0, command.Length, SocketFlags.None);
}