GAME 356 - Networking

Administrative Stuff

Welcome to network programming - it's week four and I feel like we just got started

I found these pages out there in the ether. Let's take a look.
SDL3 Wiki
Github SDL3
I cleaned up the code from last week a bit. Let's start again.
UDPClient.zip
UDPServer.zip

Assignment 0:(0/0)

Create a TCP/IP connection between two computers.
Here's some starter code.
TCPClient.zip
TCPServer.zip

Since Umer, Z and N plus second year M have pushed us into the unknown world of SDL3, I guess we'll work this out together.
The theory of this stuff I can explain easily. The new API? Let's do it.

Assignment 1:(20/25)

Create a chat system where the client and the server can write messages back and forth. The trick is in how to loop the send and recieve.
For the extra credit: Multi thread the program - yes, you can get credit for the engine class.

Assignment 2:(20/25)

Let's see if we can read a website
ReadWebPages.zip
For the extra credit: Do it with SSL

Assignment 3:

Vocabulary quiz

Assignment 4:(20/25)

Build UDP project in Unity or Unreal to communicate with C++. No chat silliness, this time send positional data including orientation.

I wanted to demonstrate how to serialize data at the byte level. Here is the finalized code I was writing in class.
UDPServer - wData.zip
UDPClient - wData.zip
UDPClientC# - wData.zip

In today's class I asked Cody to show you some code on how to make UDP work in Unity
using UnityEngine; using System.Net; using System.Net.Sockets; using System.Threading; using System; using System.Text; public class UdpClientManager : MonoBehaviour { // - Singleton, for referencing from other classes public static UdpClientManager Instance; private UdpClient m_Client; private Thread receiverThread; private const int serverPort = 0x1A2B; private const string serverIp = "192.168.1.13"; float timer = 2f; private void Awake() { // - Prevent Duplicates if (Instance != null) Destroy(this.gameObject); // - Initialize Singleton Instance = this; } private void Start() { InitializeUDP(); } private void Update() { timer -= Time.deltaTime; } private void InitializeUDP() { // - Create UDP Client in Unity m_Client = new UdpClient(); // - Create background Thread for Networking Send/Receive receiverThread = new Thread(new ThreadStart(PingServerThread)); receiverThread.IsBackground = true; receiverThread.Start(); } private void PingServerThread() { while (true) { // - Wrapping the main code in a timer to prevent flooding of messages if (timer <= 0) { // - Try to ping the server try { string message = "Pinging server from Unity"; IPEndPoint anyIP = new IPEndPoint(IPAddress.Any, serverPort); byte[] data = Encoding.UTF8.GetBytes(message); m_Client.Send(data, data.Length, serverIp, serverPort); timer = 2f; Debug.Log($"Message sent to server: {message}"); } // - Catch any net exceptions catch (SocketException e) { Debug.Log($"Socket closed: {e.Message}"); } // - Catch any other issues that might arise catch (Exception e) { Debug.Log($"Received Thread Error: {e}"); } } } } // - Because UDP Client is active when we press play, we want to close it when we stop playing private void OnApplicationQuit() { if (receiverThread != null) receiverThread.Abort(); if (m_Client != null) m_Client.Close(); } }

For the extra credit: Do it between two Unity projects or better between a Unity build and an Unreal build

Hey, check this out. Our very own Peter put together some code to connect Nintendo's JoyCon to the an engine through bluetooth JoyCon.h
JoyCon.cpp