static void Main(string[] args)
{
String thisprocessname = Process.GetCurrentProcess().ProcessName;
if (Process.GetProcesses().Count(p => p.ProcessName == thisprocessname) > 1)
{
return;
}
SQLiteConnection m_dbConnection;
m_dbConnection = new SQLiteConnection("Data Source=SecConvDB.sqlite; Version=3;");
m_dbConnection.Open();
//create DataBase file if not exists
DataBase.CreateDataBase(m_dbConnection);
Communique.AddDelegateToDictionary();
m_dbConnection.Close();
//List<string> lista = new List<string>();
//lista.Add("Monika");
//lista.Add("Robert");
//lista.Add("2017-12-06-23:00:00");
//lista.Add("1:30:22");
//Communique.DelFriend(lista);
//Communique.CallState(lista);*/
//Communique.CallState(lista);
security.CreatePublicKey();
AsynchronousSocketListener.StartListening();
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
// Retrieve the state object and the handler socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
byte[] sessionKey = null;
int bytesRead = 0;
//SESSIONKEY_RETURN:
// Read data from the client socket.
bytesRead = handler.EndReceive(ar);
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.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
// All the data has been read from the
// client. Display it on the console.
Console.WriteLine("Read {0} bytes from socket. \nData : {1}",
content.Length, content);
string messageBits = Utilities.getBinaryMessage(content);
//take 8 bits to recognize the communique
int bits8 = Convert.ToInt32(messageBits.Substring(0, 8), 2);//decimal value
if (bits8 == 17)
{
sessionKey = Program.security.SetSessionKey(Convert.FromBase64String(content.Substring(2, content.Length - 8)));
state.sessionKey = sessionKey;
Send(handler, (char)17 + " " + Convert.ToBase64String(Program.security.GetOwnerPublicKey().ToByteArray()) + " <EOF>");
//goto SESSIONKEY_RETURN;
state.buffer = new byte[1024];
state.sb = new StringBuilder();
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
else
{
content = Communique.ChooseCommunique(content, state.sessionKey, handler);
// Echo the data back to the client.
if (bits8 != 2 && bits8 != 11)
{
Send(handler, content);
}
if (bits8 == 1 && content == ((char)5).ToString() + " <EOF>") //logIn
{
string userAddressIP = ((IPEndPoint)handler.RemoteEndPoint).Address.ToString();
long userID = Communique.getUserIDHavingAdressIP(userAddressIP);
if (userID == -1)
{
Send(handler, Communique.Fail());
}
{
Send(handler, Communique.LogIP(userID)); //data about friend
Thread.Sleep(250); //miliseconds
Send(handler, Communique.History(userID)); //userID history
}
}
handler.Shutdown(SocketShutdown.Both);
handler.Close();
if (bits8 == 0)
{
}
}
}
else
{
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
