/**************************************************/
private void SendMessage(IM_Message message)
{
try
{
IFormatter binary_formatter = new BinaryFormatter();
MemoryStream mem_str = new MemoryStream();
NetworkStream network_stream = new NetworkStream(tcp.Client);
crypto_stream_writer = new CryptoStream(mem_str, encryptor, CryptoStreamMode.Write);
binary_formatter.Serialize(crypto_stream_writer, message);
crypto_stream_writer.FlushFinalBlock();
byte[] buffer = mem_str.GetBuffer();
//Send the length
network_stream.Write(BitConverter.GetBytes(buffer.Length), 0, 4);
//Send the data
network_stream.Write(buffer, 0, buffer.Length);
network_stream.Flush();
}
catch (Exception ex)
{
//File.AppendAllText("log.txt", "Encrypting: " + ex.Message + Environment.NewLine);
//Close();
}
}
private void MessageWindowRouter(IM_Message message)
{
try
{
if (MessengerStructure.ContainsKey(message.From))
{
MessengerStructure[message.From].rm(message);
}
//we only want to Create a new Client if we are to receive anything the user must see
else if (message.Type == IM_Message.MESSAGE_TYPE_MSG || message.Type == IM_Message.MESSAGE_TYPE_FILE)
{
CreateClient(message.From, message);
}
else if (message.Type == IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED || message.Type == IM_Message.MESSAGE_TYPE_CLIENT_DISCONNECTED)
{
if (MessengerStructure.ContainsKey((string)message))
{
MessengerStructure[(string)message].rm(message);
}
}
}
catch (Exception)
{
//MessageBox.Show(e.Message);
}
}
public void Send(IM_Message message)
{
if (NameSet)
{
message.From = owner_client.Name; //It's from this username
}
owner_client.Send(message);
}
public void Send(IM_Message message)
{
SendMessageDelegate send = new SendMessageDelegate(SendMessage);
IAsyncResult iRes = send.BeginInvoke(message, new AsyncCallback(iAsyncCallbackMethod), null);
while (!iRes.AsyncWaitHandle.WaitOne(100, true))
{
;
}
}
/************Background Worker Methods*************/
#region Background Worker Threads
public void background_worker_StartListening(object sender, DoWorkEventArgs e)
{
while (!background_worker.CancellationPending)
{
try
{
IFormatter binary_formatter = new BinaryFormatter();
MemoryStream mem_str = new MemoryStream();
crypto_stream_reader = new CryptoStream(mem_str, decryptor, CryptoStreamMode.Write);
NetworkStream network_stream = new NetworkStream(tcp.Client);
byte[] size = new byte[4];
network_stream.Read(size, 0, 4);
int length = BitConverter.ToInt32(size, 0);
byte[] buffer = new byte[BUFFER_SIZE];
int offset = 0, bytes_read = 0;
while (length > 0)
{
bytes_read = network_stream.Read(buffer, 0, BUFFER_SIZE);
crypto_stream_reader.Write(buffer, 0, bytes_read);
offset += bytes_read;
length -= bytes_read;
}
crypto_stream_reader.Flush();
mem_str.Seek(0, SeekOrigin.Begin);
IM_Message im = (IM_Message)binary_formatter.Deserialize(mem_str);
if (im != null)
{
background_worker.ReportProgress(0, im);
}
}
catch (Exception ex)
{
//File.AppendAllText("log.txt", "Decrypting: " + ex.Message + Environment.NewLine);
background_worker.CancelAsync();
Close();
}
}
}
private void SendClientListUpdateToAll(object custruct)
{
ClientUpdateStruct cu_struct = (ClientUpdateStruct)custruct;
IM_Message message = null;
switch (cu_struct.type)
{
case IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED:
message = new IM_Message("SERVER", String.Empty, IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED, cu_struct.name);
break;
case IM_Message.MESSAGE_TYPE_CLIENT_DISCONNECTED:
message = new IM_Message("SERVER", String.Empty, IM_Message.MESSAGE_TYPE_CLIENT_DISCONNECTED, cu_struct.name);
break;
case IM_Message.MESSAGE_TYPE_CLIENT_NAME_CHANGE:
//Message will be intercepted so that it's not sent to the client in the TO field
//NAME_CHANGE messages will not be forwarded
message = new IM_Message(cu_struct.name, String.Empty, IM_Message.MESSAGE_TYPE_CLIENT_NAME_CHANGE, cu_struct.extra);
break;
default:
break;
}
Monitor.Enter(ListLock);
List <Client> buffer = new List <Client>(
clients.Cast <Client>() /*.Where(x => !x.Name.StartsWith("_|___|__|___|_"))*/
); //don't want to include temporary names
foreach (Client c in buffer)
{
if (cu_struct.name != c.Name)
{
//Set the TO field here
message.To = c.Name;
Thread.Sleep(500);
c.Send(message);
}
}
Monitor.Exit(ListLock);
}
/*******************************************************/
/*******************************************************/
/*******************************************************/
/// <summary>
/// Receive Message from main client
/// </summary>
/// <param name="message"></param>
private void MessageProcessor(object msg)
{
IM_Message message = (IM_Message)msg;
switch (message.Type)
{
case IM_Message.MESSAGE_TYPE_MSG:
SetText(message, message.From);
Flash();
break;
case IM_Message.MESSAGE_TYPE_CLIENT_DISCONNECTED:
msgTextBox.ReadOnly = true;
button1.Enabled = false;
this.Text += " - OFFLINE";
break;
case IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED:
msgTextBox.ReadOnly = false;
button1.Enabled = true;
this.Text = this.Text.Replace(" - OFFLINE", String.Empty);
break;
}
}
/*******************************************************************/
/// <summary>
/// Brain of Server
/// </summary>
/// <param name="message"></param>
private void ProcessReceivedMessages(object msg)
{
IM_Message message = (IM_Message)msg;
Client sender = clients.WithName(message.From);
Client receiver = clients.WithName(message.To);
//if (sender == null || receiver == null) return;
//SetText("Message Received from " + message.From + ": " + message.Msg);
switch (message.Type)
{
case IM_Message.MESSAGE_TYPE_SETNAME:
//Client will not use the name requested until the server has confirmed they can
int type;
//check to see if requested name is available
if (clients.WithName(message) == null || ((string)message == String.Empty))
{
SetText(sender.Name + ": SetName: '" + message + "' approved");
type = IM_Message.MESSAGE_TYPE_SETNAME_CONFIRMATION_OK;
sender.Send(new IM_Message("SERVER", String.Empty, type, message.Data));
//Thread.Sleep(1000); //slow things down
SynchronizeClient(message.From, message);
}
else
{
type = IM_Message.MESSAGE_TYPE_SETNAME_CONFIRMATION_NO;
sender.Send(new IM_Message("SERVER", String.Empty, type, message.Data));
SetText(sender.Name + ": SetName: '" + message + "' REJECTED");
}
//Send back name confirmation to Client
break;
case IM_Message.MESSAGE_TYPE_CLIENT_LIST_CONFIRMATION:
ClientUpdateStruct custruct = new ClientUpdateStruct
{
name = sender.Name,
type = IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED
};
//Send an update to the other clients
Thread t2 = new Thread(new ParameterizedThreadStart(SendClientListUpdateToAll));
t2.Start(custruct);
LoadListToBox();
SetText(String.Format("{0} connected", sender.Name));
break;
case IM_Message.MESSAGE_TYPE_MSG:
receiver.Send(new IM_Message(sender.Name, receiver.Name, IM_Message.MESSAGE_TYPE_MSG, message.Data));
break;
case IM_Message.MESSAGE_TYPE_CLIENT_SHUTTING_DOWN:
DisconnectFrom(message.From);
break;
default:
break;
}
}
private void Initialize(IM_Message message)
{
SetText("Initializing...");
Send(new IM_Message(TempName, "SERVER", IM_Message.MESSAGE_TYPE_SETNAME, owner_client.Name));
}
private void ProcessReceivedMessages(object msg)
{
IM_Message message = (IM_Message)msg;
SetText("***************\nMessage Received: " + message + "\n***************");
switch (message.Type)
{
case IM_Message.MESSAGE_TYPE_GETNAME:
Send(new IM_Message(owner_client.Name, "SERVER", IM_Message.MESSAGE_TYPE_SETNAME, owner_client.Name));
//Initialize(message);
break;
case IM_Message.MESSAGE_TYPE_SETNAME:
//This is our temporary name
SetText("Temp Name: " + message);
TempName = message; //Implicit conversion here
Initialize(message);
break;
case IM_Message.MESSAGE_TYPE_SETNAME_CONFIRMATION_OK:
//Only acknowledge name if it matches the one requested
if (message == owner_client.Name)
{
//Everything seemed to have went OK in the Name Acknowledgement
NameSet = true;
SetText("Name set to " + owner_client.Name);
SetStatus("Status: Connected");
EnableDisableControls(false);
}
else
{
SetStatus("Name could not be verified. Shutting down.");
SetText("Name could not be verified");
ShuttingDown();
EnableDisableControls(true);
}
break;
case IM_Message.MESSAGE_TYPE_SETNAME_CONFIRMATION_NO:
//YOU MUST REQUEST ANOTHER NAME HERE
NameSet = false;
SetText("Name rejected");
ShuttingDown(); //disconnect from server
EnableDisableControls(true);
SetStatus("Request another name!");
break;
case IM_Message.MESSAGE_TYPE_MSG:
MessageWindowRouter(message);
break;
case IM_Message.MESSAGE_TYPE_CLIENT_LIST:
//Only will be called when the client connects first
SetText("Client List: " + (string)message);
UpdateClientList(((string)message).Split(new char[] { '*' }));
Send(new IM_Message(owner_client.Name, String.Empty, IM_Message.MESSAGE_TYPE_CLIENT_LIST_CONFIRMATION, String.Empty));
break;
case IM_Message.MESSAGE_TYPE_FORM_CLOSING:
MessengerStructure.Remove(message);
break;
case IM_Message.MESSAGE_TYPE_BROADCAST:
MessageBox.Show(message, "Broadcast From " + message.From, MessageBoxButtons.OK, MessageBoxIcon.Information);
break;
case IM_Message.MESSAGE_TYPE_CLIENT_CONNECTED:
SetText(message + " connected.");
MessageWindowRouter(message);
ClientConnected((string)message);
break;
case IM_Message.MESSAGE_TYPE_CLIENT_DISCONNECTED:
SetText(message + " disconnected.");
MessageWindowRouter(message);
ClientDisconnected((string)message);
break;
case IM_Message.MESSAGE_TYPE_SERVER_DISCONNECTING:
//ShuttingDown();
SetText("Server disconnecting.");
SetStatus("Server Disconnected");
clientsListBox.Items.Clear();
EnableDisableControls(true);
break;
}
}
