Sockets

09/25/2013 04:19 shadowman123#1

well i've Gone through socket and understood lots of things ..i got questions about it .. i've read that Async Sockets are better than Sync socket cuz Sync sockets Blocks the main Thread unlike the Async so the question is .. since Async is better than Sync socket why they have created it since every1 would use the better socket Type which is Async ... in other Rephrase when should i use Sync sockets ? .. and i'd like to know about Cons and Pros of using TcpListeners and TcpClient instead of Mentioned Socket Types above ...

Another question i've created Windows Form Application which is Server but the problem is that when i create this code the Application Freezes and when i click on it ..it gives me Not Responding Error ..Same for client ... it connects to the server then Freeze and give me same Not Responding Error

Problem ScreenShot

Spoiler

Here Are the Codes I used
used Ip = "127.0.0.1", Port = 5100

Code:

public void StartServer(string Ip, ushort Port)
        {
            Soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            Soc.Bind(new IPEndPoint(IPAddress.Parse(Ip), Port));
            textBox2.Text += " Server Is Created On Ip : " + IpAdd + ", Port : " + Port + Environment.NewLine;
            Soc.Listen(100);
            textBox2.Text += " Server Is Listening to Clients Now... " + Environment.NewLine;
            StartListening();
        }

Code:

public void StartListening()
        {
            while (true)
            {
                var Client = Soc.Accept();
                textBox2.Text += " Client Located At Ip : " + Client.RemoteEndPoint + " Is Now Connected To Server " + Environment.NewLine;
                byte[] ReceivedBytes = new byte[1024];
                int ReceivedDataLength = 0;
                while ((ReceivedDataLength = Soc.Receive(ReceivedBytes)) > 0)
                {
                    string MessageFromClient = ASCIIEncoding.ASCII.GetString(ReceivedBytes, 0, ReceivedBytes.Length);
                    textBox2.Text += " Message Sent to Server : " + MessageFromClient + Environment.NewLine;
                }
            }
        }

Additional Question : How can i remove that Stupid Shadow surrounding the Application Border ? its makes the Application look worse , shitty

regards
shadowman123

09/25/2013 06:10 TheComputerist#2

1: Blocking sockets where used in prehistoric times when dinosaurs ruled the internet and didn't have a better programming scheme/ didn't have computers strong enough to do such things. So it's there for anyone that still wants it, kind of.

2: There are multiple answers, it could be due to bad code, an infinite loop that is never exited, etc. Don't go straight for "Portforward" or "Opening the port for firewall" because that doesn't freeze the window. The only thing it should do is not let you connect to the server at all therefore giving you an error. But lets say you ignore that error and try to connect, you might have a loop somewhere that causes the freeze due to the bad socket/ connection.

3: I don't know of anyway to remove the black border. Wait now that I think about it. You could create a windows class without borders and have Direct2d or GDI(Depending on your windows version) to draw to the window without having that border(I haven't tried this so take it with a grain of salt).

09/25/2013 07:11 shadowman123#3

Thx Alot dude for your Answer ... Helped me Alot but for the sockets part ... i use while (true) 2 Times .. 1st is for listening to incoming client connection , 2nd for Receiving Data so u think thats the problem ? even when i use Thread.Sleep method i get the same result ... idk what to do but im stuck really at this point . i'd like to cross this shit to learn smthing new :S

09/25/2013 14:04 TheComputerist#4

Hmm well I can't make out the error from that description but just double check your code to see if it follow a similar schematics to this.

Server:
1:Create socket (Set it up obviously)
2:Bind socket to a local port, in your case it's 127.0.0.1 port 5000 which is a localhost address.
3:Put that binded socket into listening mode.(Once a socket is in listening mode you can reuse it to accept multiple connections given that you don't overwritte the listening socket variables value with something else)
4: You could rather go two easy ways. Accept only one connection and have a P2P connection going on or have it be dynamic in the sense that you have the main thread always Accepting new connections to new sockets. Then you have a separate thread handling sending and receiving messages(The operating system should handle synchronization in this case).
5: Which ever way you go it's almost the same. Accept a connection into a separate socket than the one that's listening. Send some data to client. And have the client receive it. Visa versa.

Client:
1:Create socket (Set it up obviously)
2:Bind socket to a local port, 127.0.0.1 but with a different port that's not 5000 since your server will be using that port and you'll get an error if you try to bind to an already binded port
3: Settup the correct parameters(IP:127.0.0.1, Port:5000) for the socket you want to connect to.
4:Attempt to connect to the server and recv data or send.

Ps. Remember to give your processor some breathing room for now. So (I think it's the same for C# as in c++) use the function Sleep at the end of the loops that send and recv data just for now.

BONUS: Look what I found on google about borderless windows :D/ the answer to your prayers
This is the best one i've found on getting rid of boders... Given it's c++ but it remains.

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These use WPF which is a .NET thing...

Spoiler

09/25/2013 18:21 shadowman123#5

Quote:

Originally Posted by TheComputerist

Client:
1:Create socket (Set it up obviously)
2:Bind socket to a local port, 127.0.0.1 but with a different port that's not 5000 since your server will be using that port and you'll get an error if you try to bind to an already binded port
3: Settup the correct parameters(IP:127.0.0.1, Port:5000) for the socket you want to connect to.
4:Attempt to connect to the server and recv data or send.

Ps. Remember to give your processor some breathing room for now. So (I think it's the same for C# as in c++) use the function Sleep at the end of the loops that send and recv data just for now.

y would i bind the client to speific Port since all client do is connect ???
im talking about Win Form Application not WPF .. i dislike XAML language beside i dont understand anything with it :D anyways u r alawys helping me and thats smthing i really Appriciate .. Thx dude

09/25/2013 21:13 shadowman123#6

i get the same Result Yuki event if i did .. Thread.Sleep(1000000000); i tried everything

09/25/2013 22:19 TheComputerist#7

Quote:

Originally Posted by shadowman123

y would i bind the client to speific Port since all client do is connect ???
im talking about Win Form Application not WPF .. i dislike XAML language beside i dont understand anything with it :D anyways u r alawys helping me and thats smthing i really Appriciate .. Thx dude

Ups, yeah you're right, you don't have to bind when you're dealing with a client that is connecting lol. Although I've used the bind + connect without any problem.Sorry. So any luck with your problem, both borders and freezing?

09/26/2013 00:34 shadowman123#8

Quote:

Originally Posted by TheComputerist

Ups, yeah you're right, you don't have to bind when you're dealing with a client that is connecting lol. Although I've used the bind + connect without any problem.Sorry. So any luck with your problem, both borders and freezing?

well i Wrote my Problem in Stackflow site and received this Code .. it works but for Send it gives me error saying that threre is no Address Ip selected ...

the code after their Edit became

Code:

public void ReceiveData()
        {
            new Thread(() =>
            {
                while (true)
                {
                    var Client = Soc.Accept();
                    ClientList.Add(Client);
                    label3.Text = ClientList.Count.ToString() + "/" + MaxClients;
                    textBox2.Text += " Client Located At Ip : " + Client.RemoteEndPoint.ToString().Split(':')[0].ToString() + " Is Now Connected To Server " + Environment.NewLine;

                    new Thread(() =>
                    {
                        while (true)
                        {
                            byte[] ReceivedBytes = new byte[1024];
                            int ReceivedDataLength = Client.Receive(ReceivedBytes, 0, ReceivedBytes.Length, SocketFlags.None);
                            string MessageFromClient = Encoding.Default.GetString(ReceivedBytes, 0, ReceivedDataLength);

                        }
                    }).Start();
                }
            }).Start();
        }

Sending Message From Client to Server is okay but when From Server -> client it give me that Error

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Sending Code From Server

Code:

private void button1_Click(object sender, EventArgs e) // Send
        {
            try
            {
                string MessageToSend = textBox1.Text;
                byte[] Buffer = Encoding.Default.GetBytes(MessageToSend);
                foreach (var client in ClientList)
                {
                    ServerSocket.Send(Buffer, 0, Buffer.Length, SocketFlags.None);
                }
                textBox2.Text += " Server : " + MessageToSend + Environment.NewLine;
            }
            catch (Exception x)
            {
                MessageBox.Show(x.ToString());
            }
        }

09/26/2013 07:50 TheComputerist#9

When dealing with UDP packets it's required to bind. Not so much on TCP. And this has gone on long enough, someone who knows C# better than me needs to finish this lol.
But I'm still trying to figure this one out @_@.

09/26/2013 08:45 shadowman123#10

Quote:

Originally Posted by TheComputerist

When dealing with UDP packets it's required to bind. Not so much on TCP. And this has gone on long enough, someone who knows C# better than me needs to finish this lol.
But I'm still trying to figure this one out @_@.

you know ..i can use Async socket and its gonna work but i would like / Insist to know whats wrong causing this ... i spent long time trying to understand but havent got result yet

09/29/2013 14:46 atef201080#11

make a new thread for the whole socket not only the receive loop, and don't sleep the main thread that will cause application freeze.

09/30/2013 11:19 shadowman123#12

Quote:

Originally Posted by atef201080

make a new thread for the whole socket not only the receive loop, and don't sleep the main thread that will cause application freeze.

no u are completely Wrong , if you didnt Call Thread.Sleep() Method the Application is going to raise the CPU Alot .. so u should call this method ( Thats y they created it ) .. beside it wont affect badly on Project if you used suitable sleep time lets say > 0 && < 1000 would be Fine ..if more than 1000 app might have problems with Application Function

and about the Threading .. yea i should add all Socket system Methods within new Thread in order not to block the main Thread from working but anyways ill try to figure out whats wrong but really Async is much better and very easy to be Implemented

09/30/2013 17:22 atef201080#13

Quote:

Originally Posted by shadowman123

no u are completely Wrong , if you didnt Call Thread.Sleep() Method the Application is going to raise the CPU Alot .. so u should call this method ( Thats y they created it ) .. beside it wont affect badly on Project if you used suitable sleep time lets say > 0 && < 1000 would be Fine ..if more than 1000 app might have problems with Application Function

and about the Threading .. yea i should add all Socket system Methods within new Thread in order not to block the main Thread from working but anyways ill try to figure out whats wrong but really Async is much better and very easy to be Implemented

if you put a thread sleep on the main thread the form will freeze while the sleep time, just put the socket and everything in a void and start it using new thread

PHP Code:


			
SocketSystem = new Thread(() => SocketSystem(parametrs));

SocketSystem.Start();