/// <summary>
/// Set the server settings that declared as object fields
/// </summary>
private static void SetupServer()
{
Console.WriteLine("Setting up server...");
serverSocket.Bind(new IPEndPoint(IPAddress.Any, PORT));
serverSocket.Listen(0);
serverSocket.BeginAccept(AcceptCallback, null);
Config c = new Config();
Server s = new Server();
m.Mat = s.GenerateMatrix(c.getVertices());
mNew.Mat = new int[c.getVertices(), c.getVertices()];
Console.WriteLine("Generated graph vertices: {0}", c.getVertices());
Console.WriteLine("Waiting for {0} clients to send matrix", c.getClients());
Console.WriteLine("Server setup complete");
}
/// <summary>
/// Accept connection
/// </summary>
private static void AcceptCallback(IAsyncResult AR)
{
Socket socket;
try
{
socket = serverSocket.EndAccept(AR);
}
catch (ObjectDisposedException) // I cannot seem to avoid this (on exit when properly closing sockets)
{
return;
}
clientSockets.Add(socket);
socket.BeginReceive(buffer, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCallback, socket);
Console.WriteLine("Client connected (IP: {0})", ((IPEndPoint)(socket.RemoteEndPoint)).Address.ToString());
Config c = new Config();
Console.WriteLine(c.getClients() - clientSockets.Count + " clients left to start calculate");
serverSocket.BeginAccept(AcceptCallback, null);
}
/// <summary>
/// Function sends response to client
/// </summary>
private static void ReceiveCallback(IAsyncResult AR)
{
Socket current = (Socket)AR.AsyncState;
int received;
try
{
received = current.EndReceive(AR);
}
catch (SocketException)
{
Console.WriteLine("Client forcefully disconnected");
// Don't shutdown because the socket may be disposed and its disconnected anyway.
current.Close();
clientSockets.Remove(current);
return;
}
byte[] recBuf = new byte[received];
Array.Copy(buffer, recBuf, received);
string text = Encoding.ASCII.GetString(recBuf);
Message msg = new Message();
msg.matrix = new Matrix();
msg = JsonConvert.DeserializeObject <Message>(text);
switch (msg.type)
{
case 0: // First request from client
Server s = new Server();
Config c = new Config();
Message me = new Message();
if (c.getClients() > clientSockets.Count)
{
me.type = 0;
me.message = "Not enough clients connected to server.";
string jsonmess = JsonConvert.SerializeObject(me, Formatting.Indented);
byte[] data = Encoding.ASCII.GetBytes(jsonmess);
current.Send(data);
}
else
{
me.type = 1;
me.matrix = m;
string json = JsonConvert.SerializeObject(me, Formatting.Indented);
byte[] data = Encoding.ASCII.GetBytes(json);
me.message = "Server sending length of matrix to clients";
me.length = data.Length;
me.matrix = null;
me.type = 2;
int j = 0;
foreach (Socket value in clientSockets)
{
me.from = s.calculateRanges(c.getClients(), c.getVertices(), j)[0];
me.to = s.calculateRanges(c.getClients(), c.getVertices(), j)[1];
json = JsonConvert.SerializeObject(me, Formatting.Indented);
data = Encoding.ASCII.GetBytes(json);
value.Send(data);
Console.WriteLine("Information send to client {0}.", ((IPEndPoint)(value.RemoteEndPoint)).Address.ToString());
j++;
}
Message msa = new Message();
msa.type = 1;
msa.matrix = m;
string jsonz = JsonConvert.SerializeObject(msa, Formatting.Indented);
byte[] dataz = Encoding.ASCII.GetBytes(jsonz);
j = 0;
Console.WriteLine("Serialized object size: {0} BYTE", me.length);
foreach (Socket value in clientSockets.ToList())
{
SendChunks(value, me.length, dataz);
j++;
}
Console.WriteLine("Generated Matrix Send to Clients");
}
break;
case 1: // Response with calulcated array
Console.WriteLine("Received array from client (IP: {0})", ((IPEndPoint)(current.RemoteEndPoint)).Address.ToString());
int L = (int)Math.Floor((double)Math.Pow(msg.matrix.Mat.Length, 0.5));
for (int i = 0; i <= L - 1; i++)
{
for (int j = msg.from; j <= msg.to; j++)
{
mNew.Mat[i, j] = msg.matrix.Mat[i, j];
}
}
responses++;
Config sc = new Config();
if (responses == sc.getClients())
{
Console.WriteLine("Merging all solutions");
Server sxaz = new Server();
sxaz.SaveMatrixToFile(m.Mat, "Matrix.txt");
sxaz.SaveMatrixToFile(mNew.Mat, "NewMatrix.txt");
Console.WriteLine("Generated matrix saved to file Matrix.txt and calculated matrix to NewMatrix.txt. Press Enter to Exit");
}
break;
case 2: // Exit request
Console.WriteLine("Client disconnected (IP: {0})", ((IPEndPoint)(current.RemoteEndPoint)).Address.ToString());
current.Shutdown(SocketShutdown.Both);
current.Close();
clientSockets.Remove(current);
return;
}
current.BeginReceive(buffer, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCallback, current);
}
