public static Boolean requestConnect(IPAddress address, int port)
{
bool connectionSuccessful = false;
bool userDone = false;
UdpClient client = new UdpClient();
Globals.discoveredUDPClients.Clear(); //refresh discovered
while (!userDone)
{
int attempts = 0; //refresh number of attempts
Console.WriteLine("\n\nRequesting connection to " + address + ":");
while (attempts <= Globals.maxNetworkingAttempts && !connectionSuccessful)
{
Console.WriteLine(" Attempt " + attempts + " of " + Globals.maxNetworkingAttempts + "...");
IPEndPoint ip = new IPEndPoint(address, port);
byte[] bytes = new udpMessage("CONNECT", 1, 0, "").getByteArray();
client.Send(bytes, bytes.Length, ip);
while (!Globals.discoveredUDPClients.IsEmpty)
{
Tuple <IPAddress, udpMessage> currentItem;
if (Globals.discoveredUDPClients.TryDequeue(out currentItem) &&
currentItem.Item1.Equals(address) &&
currentItem.Item2.command.Equals("CONNECT"))
{
connectionSuccessful = true;
userDone = true;
}
}
Thread.Sleep(Globals.ThreadSleepTime);
attempts++;
}
if (!connectionSuccessful)
{
Console.Write(" There was no response; would you like to try again?\n >> ");
if (checkMenuResponseFalse(Console.ReadLine()))
{
userDone = true;
}
}
}
client.Close();
if (connectionSuccessful)
{
Console.WriteLine(" :) Connection approved!");
}
else
{
Console.WriteLine(" !! Connection Request Unsuccessful");
}
return(connectionSuccessful);
}
public static Boolean udpPlayRockPaperScissors(IPAddress iPAddress, int port, out bool winner)
{
winner = false;
Boolean winnerFound = false;
if (Globals.rpsDebugging)
{
Console.WriteLine(" Playing rock, paper, scissors!");
}
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
UdpClient client = new UdpClient();
//Globals.discoveredUDPClients.Clear(); //refresh discovered
int rpsThrow = new Random().Next(0, 10000);
int currentMessageId = 333;
while (!winnerFound)
{
if (Globals.rpsDebugging)
{
Console.WriteLine(" :) Your throw: " + rpsThrow);
}
IPEndPoint ip = new IPEndPoint(iPAddress, port);
byte[] bytes = new udpMessage("RPS", currentMessageId, rpsThrow, "").getByteArray();
for (int i = 0; i < Globals.udpPulse; i++)
{
client.Send(bytes, bytes.Length, ip);
}
Thread.Sleep(Globals.ThreadSleepTime);
while (!Globals.discoveredUDPClients.IsEmpty)
{
Tuple <IPAddress, udpMessage> currentItem;
udpMessage lastItem = new udpMessage("RPS", currentMessageId - 1, 0, "");
if (Globals.discoveredUDPClients.TryDequeue(out currentItem) &&
currentItem.Item1.Equals(iPAddress))
{
int otherThrow = currentItem.Item2.number;
if (Globals.rpsDebugging)
{
Console.WriteLine(" Their throw: " + currentItem.Item2.number);
}
if (currentItem.Item2.messageId == currentMessageId)
{
if (otherThrow > rpsThrow)
{
winnerFound = true;
if (Globals.rpsDebugging)
{
Console.WriteLine(" They won!");
}
}
else if (rpsThrow > otherThrow)
{
winner = true;
winnerFound = true;
if (Globals.rpsDebugging)
{
Console.WriteLine(" :) You won!");
}
}
else
{
if (Globals.rpsDebugging)
{
Console.WriteLine(" Tie? {0} from {1}", currentItem.Item2.number, currentItem.Item1);
}
}
}
}
}
if (stopwatch.ElapsedMilliseconds > Globals.maxRockPaperScissorsTime)
{
Console.WriteLine(" !! Chat host could not be resolved.");
break;
}
Thread.Sleep(Globals.ThreadSleepTime);
}
client.Close();
return(winnerFound);
}
public static Boolean startChatClient(IPAddress ipAddress, int port)
{
bool chatClientSuccess = false, done = false, isWinner = false, winnerFound = false, firstTime = true;
Console.WriteLine("\n\nStarting TCP Chat client...");
winnerFound = udpPlayRockPaperScissors(ipAddress, Globals.udpPort, out isWinner);
if (winnerFound)
{
if (isWinner)
{
bool otherReady = false;
int attempts = 0;
while (attempts < Globals.maxNetworkingAttempts)
{
while (!Globals.discoveredUDPClients.IsEmpty)
{
Tuple <IPAddress, udpMessage> currentItem;
if (Globals.discoveredUDPClients.TryDequeue(out currentItem) &&
currentItem.Item1.Equals(ipAddress))
{
if (currentItem.Item2.command.Equals("TCPREADY"))
{
otherReady = true;
attempts = Globals.maxNetworkingAttempts;
}
}
}
attempts++;
Thread.Sleep(Globals.ThreadSleepTime);
}
if (otherReady)
{
try {
TcpClient tcpClient = new TcpClient(ipAddress.ToString(), port);
NetworkStream nwStream = tcpClient.GetStream();
string messageToSend = "";
while (!done)
{
if (firstTime)
{
Console.Write(" Enter your message, type \"/exit\" when it's your turn to quit!\n >> "); firstTime = false;
}
else
{
Console.Write(" >> ");
}
messageToSend = Console.ReadLine();
if (messageToSend.Equals("/exit") || messageToSend.Equals("/quit") || messageToSend.Equals("/q"))
{
done = true;
Byte[] dataToSend = System.Text.Encoding.ASCII.GetBytes(" !! The other user has left.");
nwStream.Write(dataToSend, 0, dataToSend.Length);
}
else
{
Byte[] dataToSend = System.Text.Encoding.ASCII.GetBytes(messageToSend);
nwStream.Write(dataToSend, 0, dataToSend.Length);
dataToSend = new Byte[256];
// String to store the response ASCII representation.
String responseData = String.Empty;
// Read the first batch of the TcpServer response bytes.
//Int32 bytes = nwStream.Read(data, 0, data.Length);
//responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
//Console.WriteLine(" Received message:\n ", responseData);
byte[] buffer = new byte[tcpClient.ReceiveBufferSize];
int bytesRead = nwStream.Read(buffer, 0, tcpClient.ReceiveBufferSize);
string dataReceived = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine(" -- " + dataReceived);
}
}
// Close everything.
nwStream.Close();
tcpClient.Close();
}
catch (ArgumentNullException e)
{
if (Globals.debugging)
{
Console.WriteLine("ArgumentNullException: {0}", e);
}
Console.WriteLine(" !! Error; try again later!");
}
catch (SocketException e)
{
if (Globals.debugging)
{
Console.WriteLine("SocketException: {0}", e);
}
Console.WriteLine(" !! Error, the socket was likely still in use; try again in a minute!");
}
catch (System.IO.IOException e) {
if (Globals.debugging)
{
Console.WriteLine("IO Exception: " + e);
}
Console.WriteLine(" !! Error; the user likely left.");
}
}
else
{
Console.WriteLine(" !! Could not connect to other client.");
}
}
else
{
//---listen at the specified IP and port no.---
TcpListener listener = new TcpListener(IPAddress.Any, port);
Console.WriteLine(" The other person gets to chat first!");
try {
listener.Start();
UdpClient udpClient = new UdpClient();
IPEndPoint ip = new IPEndPoint(ipAddress, Globals.udpPort);
byte[] udpBytes = new udpMessage("TCPREADY", 1, 1, "").getByteArray();
for (int i = 0; i < Globals.udpPulse; i++)
{
udpClient.Send(udpBytes, udpBytes.Length, ip);
}
udpClient.Close();
TcpClient tcpClient = listener.AcceptTcpClient();
NetworkStream nwStream = tcpClient.GetStream();
byte[] buffer = new byte[tcpClient.ReceiveBufferSize];
int bytesRead = nwStream.Read(buffer, 0, tcpClient.ReceiveBufferSize);
string dataReceived = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine(" -- " + dataReceived);
string messageToSend = "";
while (!done)
{
if (firstTime)
{
Console.Write(" Enter your message, type \"/exit\" when it's your turn to quit!\n >> "); firstTime = false;
}
else
{
Console.Write(" >> ");
}
messageToSend = Console.ReadLine();
if (messageToSend.Equals("/exit") || messageToSend.Equals("/quit") || messageToSend.Equals("/q"))
{
done = true;
Byte[] dataToSend = System.Text.Encoding.ASCII.GetBytes(" !! The other user has left.");
nwStream.Write(dataToSend, 0, dataToSend.Length);
}
else
{
Byte[] dataToSend = System.Text.Encoding.ASCII.GetBytes(messageToSend);
nwStream.Write(dataToSend, 0, dataToSend.Length);
dataToSend = new Byte[256];
String responseData = String.Empty;
buffer = new byte[tcpClient.ReceiveBufferSize];
bytesRead = nwStream.Read(buffer, 0, tcpClient.ReceiveBufferSize);
dataReceived = Encoding.ASCII.GetString(buffer, 0, bytesRead);
Console.WriteLine(" -- " + dataReceived);
}
}
tcpClient.Close();
listener.Stop();
}
catch (ArgumentNullException e)
{
if (Globals.debugging)
{
Console.WriteLine("ArgumentNullException: {0}", e);
}
Console.WriteLine(" !! Error; try again later!");
}
catch (SocketException e)
{
if (Globals.debugging)
{
Console.WriteLine("SocketException: {0}", e);
}
Console.WriteLine(" !! Error, the socket was likely still in use; try again in a minute!");
}
catch (System.IO.IOException e) {
if (Globals.debugging)
{
Console.WriteLine("IO Exception: " + e);
}
Console.WriteLine(" !! Error; the user likely left.");
}
}
}
Console.WriteLine(" Exiting the chat client");
return(chatClientSuccess);
}
public static bool searchNearby()
{
var searchSuccess = false;
var keepSearching = true;
int maxAttempts = 10;
int attempts = 0;
var reportedClients = new List <IPAddress>(); //for UI reporting and interaction
while (keepSearching)
{
UdpClient client = new UdpClient();
attempts = 0; //refresh number of attempts
Globals.discoveredUDPClients.Clear(); //refresh discovered
reportedClients = new List <IPAddress>(); //refresh valid available
if (Globals.debugging)
{
reportedClients.Add(IPAddress.Parse(Globals.defaultIPAddress));
}
Console.WriteLine("\n\nSearching...\nDiscovered Clients:");
while (attempts <= maxAttempts)
{
IPEndPoint ip = new IPEndPoint(IPAddress.Broadcast, Globals.udpPort);
byte[] bytes = new udpMessage("SEARCH", 1, 0, "").getByteArray();
client.Send(bytes, bytes.Length, ip);
while (!Globals.discoveredUDPClients.IsEmpty)
{
Tuple <IPAddress, udpMessage> currentItem;
if (Globals.discoveredUDPClients.TryDequeue(out currentItem) &&
!reportedClients.Contains(currentItem.Item1) &&
!Globals.localIPAddresses.Contains(currentItem.Item1) &&
currentItem.Item2.command.Equals("SEARCH"))
{
reportedClients.Add(currentItem.Item1);
Console.WriteLine(" [" + reportedClients.IndexOf(currentItem.Item1) + "] " + currentItem.Item1);
}
}
Thread.Sleep(Globals.ThreadSleepTime);
attempts++;
}
client.Close();
if (reportedClients.Count <= 0)
{
Console.WriteLine(" ! No nearby clients found.");
}
Console.Write(" Search again?\n >> ");
var input = Console.ReadLine();
if (checkMenuResponseFalse(input))
{
keepSearching = false;
}
}
if (reportedClients.Count > 0)
{
int menuoptions = reportedClients.Count + 1;
Console.WriteLine("\n\nChoose a client to connect to!");
foreach (IPAddress item in reportedClients)
{
Console.WriteLine(" [" + (reportedClients.IndexOf(item) + 1) + "] " + item);
}
Console.Write(" [0] exit\n >> ");
int selectedMenuOption = 0;
if (!Int32.TryParse(Console.ReadLine(), out selectedMenuOption) || selectedMenuOption > menuoptions || selectedMenuOption < 1)
{
selectedMenuOption = 0; //check for invalid selection
}
else
{
Globals.targetIpAddress = reportedClients[selectedMenuOption - 1]; //subtract 1 to offset for zero being exit
Console.WriteLine(" Option {0} chosen, {1} set as target IP Address.", selectedMenuOption, Globals.targetIpAddress);
searchSuccess = true;
}
}
return(searchSuccess);
}