private void ReadCallback(IAsyncResult ar)
{
try
{
string message;
HelpObject help = ((HelpObject)ar.AsyncState);
Socket client = help.socket;
int length = client.EndReceive(ar);
if (length > 1)
{
help.sb.Append(Encoding.ASCII.GetString(help.buffer, 0, length)); //einlesen
message = help.sb.ToString();
if (message.IndexOf("<EOF>") < 0)
{
//wenn noch nicht alles eingelesen wurde, vorgang wiederholen
client.BeginReceive(help.buffer, 0, HelpObject.BufferSize, SocketFlags.None, new AsyncCallback(ReadCallback), help);
}
else
{
//Antwort senden
ArduinoIP = client.RemoteEndPoint.ToString().Split(':')[0];
string reponse = Processing(message.Substring(0, message.IndexOf("<EOF>")));
Console.WriteLine("Answer: " + reponse);
Send(client, reponse);
}
}
}
catch (Exception) { }
}
private void ReceiveCallback(IAsyncResult ar)
{
try
{
HelpObject help = (HelpObject)ar.AsyncState;
Socket client = help.socket;
int length = client.EndReceive(ar); //Empfangen beenden
if (length > 0)
{
help.sb.Append(Encoding.ASCII.GetString(help.buffer, 0, length));
string message = help.sb.ToString();
if (message.IndexOf("<EOF>") < 0)
{
//Wenn Nachricht noch nicht komplett ausgelesen, Vorgang wiederholen
client.BeginReceive(help.buffer, 0, HelpObject.BufferSize, SocketFlags.None, new AsyncCallback(ReceiveCallback), help);
}
else
{
//Sockets schließen
Console.WriteLine("Reponse: " + message + "\n");
client.Shutdown(SocketShutdown.Both);
client.Close();
}
}
}
catch (Exception) { new Client().StartClient(IP, me); }
}
private void AcceptCallback(IAsyncResult ar)
{
manuelresetevent.Set(); //server wieder freistellen
Socket client = ((Socket)ar.AsyncState).EndAccept(ar);
HelpObject help = new HelpObject {
socket = client
}; // Socket für die Übergabe speichern
client.BeginReceive(help.buffer, 0, HelpObject.BufferSize, SocketFlags.None, new AsyncCallback(ReadCallback), help); //Empfang der Daten beginnen
}
private void Receive(Socket client)
{
try
{
HelpObject help = new HelpObject {
socket = client
};
client.BeginReceive(help.buffer, 0, HelpObject.BufferSize, SocketFlags.None, new AsyncCallback(ReceiveCallback), help); //Empfangen starten
}
catch (Exception) { }
}
private void ConnectCallback(IAsyncResult ar)
{
try
{
HelpObject help = (HelpObject)ar.AsyncState;
Socket client = help.socket;
client.EndConnect(ar);
Console.WriteLine("Socket connected to " + client.RemoteEndPoint.ToString());
Send(help.socket, help.sb.ToString()); //Nachricht senden
}
catch (Exception) { }
}
public void StartClient(string IPAddress_, string message) //Nachricht an einen Netzwerkteilnehmer senden
{
IP = IPAddress_; me = message;
IPAddress address = IPAddress.Parse(IPAddress_);
IPEndPoint endPoint = new IPEndPoint(address, HelpObject.arduinoport);
Socket client;
try
{
client = new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
HelpObject help = new HelpObject {
socket = client
};
help.sb.Append(message);
client.BeginConnect(endPoint, new AsyncCallback(ConnectCallback), help); //Verbindung versuchen aufzubauen
}
catch (Exception) { }
}
