/// <summary>
/// Method that is performed when a new user is disconnected.
/// </summary>
/// <param name="sender">The object that sent this message</param>
/// <param name="user">The user that needs to be disconnected</param>
private void user_UserDisconnected(object sender, Client user)
{
connectedClients--;
//Send a message to every other client notifying them on a removed client, if the setting is set to True
if (Properties.Settings.Default.SendMessageToClientsWhenAUserIsRemoved)
{
writeStream.Position = 0;
//Write in the form {Protocol}{User_ID}{User_IP}
writer.Write(Properties.Settings.Default.DisconnectedPlayerByteProtocol);
writer.Write(user.id);
writer.Write(user.IP);
SendData(GetDataFromMemoryStream(writeStream), user);
}
//Print the removed player message to the server window.
Console.WriteLine(user.ToString() + " disconnected\tConnected Clients: " + connectedClients + "\n");
//Clear the array's index
client[user.id] = null;
}
/// <summary>
/// Relay messages sent from one client and send them to others
/// </summary>
/// <param name="sender">The object that called this method</param>
/// <param name="data">The data to relay</param>
private void user_DataReceived(Client sender, byte[] data)
{
writeStream.Position = 0;
if (Properties.Settings.Default.EnableSendingIPAndIDWithEveryMessage)
{
//Append the id and IP of the original sender to the message, and combine the two data sets.
writer.Write(sender.id);
writer.Write(sender.IP);
data = CombineData(data, writeStream);
}
//If we want the original sender to receive the same message it sent, we call a different method
if (Properties.Settings.Default.SendBackToOriginalClient)
{
SendData(data);
}
else
{
SendData(data, sender);
}
}
/// <summary>
/// Sends a message to every client except the source.
/// </summary>
/// <param name="data">Data to send</param>
/// <param name="sender">Client that should not receive the message</param>
private void SendData(byte[] data, Client sender)
{
foreach (Client c in client)
{
if (c != null && c != sender)
{
c.SendData(data);
}
}
//Reset the writestream's position
writeStream.Position = 0;
}
/// <summary>
/// Method that is performed when a new user is added.
/// </summary>
/// <param name="sender">The object that sent this message</param>
/// <param name="user">The user that needs to be added</param>
private void listener_userAdded(object sender, Client user)
{
connectedClients++;
//Send a message to every other client notifying them on a new client, if the setting is set to True
if (Properties.Settings.Default.SendMessageToClientsWhenAUserIsAdded)
{
writeStream.Position = 0;
//Write in the form {Protocol}{User_ID}{User_IP}
writer.Write(Properties.Settings.Default.NewPlayerByteProtocol);
writer.Write(user.id);
writer.Write(user.IP);
SendData(GetDataFromMemoryStream(writeStream), user);
}
//Set up the events
user.DataReceived += new DataReceivedEvent(user_DataReceived);
user.UserDisconnected += new ConnectionEvent(user_UserDisconnected);
//Print the new player message to the server window.
Console.WriteLine(user.ToString() + " connected\tConnected Clients: " + connectedClients + "\n");
//Add to the client array
client[user.id] = user;
}
/// <summary>
/// Called when a client connects to the server
/// </summary>
/// <param name="ar">Status of the Async method</param>
private void AcceptClient(IAsyncResult ar)
{
//We need to end the Async method of accepting new clients
TcpClient client = listener.EndAcceptTcpClient(ar);
//id is originally -1 which means a user cannot connect
int id = -1;
for (byte i = 0; i < usedUserID.Length; i++)
{
if (usedUserID[i] == false)
{
id = i;
break;
}
}
//If the id is still -1, the client what wants to connect cannot (probably because we have reached the maximum number of clients
if (id == -1)
{
Console.WriteLine("Client " + client.Client.RemoteEndPoint.ToString() + " cannot connect. ");
return;
}
//ID is valid, so create a new Client object with the server ID and IP
usedUserID[id] = true;
Client newClient = new Client(client, (byte)id);
//We are now connected, so we need to set up the User Disconnected event for this user.
newClient.UserDisconnected += new ConnectionEvent(client_UserDisconnected);
//We are now connected, so call all delegates of the UserAdded event.
if (userAdded != null)
userAdded(this, newClient);
//Begin listening for new clients
ListenForNewClient();
}
/// <summary>
/// User disconnects from the server
/// </summary>
/// <param name="sender">Original object that called this method</param>
/// <param name="user">Client to disconnect</param>
void client_UserDisconnected(object sender, Client user)
{
usedUserID[user.id] = false;
}
