tcpSocket.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class tcpSocket : MonoBehaviour
{
    private const int bufferSize = 1024;
    private const string serverIP = "192.168.1.12";
    private const int port = 12345;
    int i = 0;

    // Create tcp/ip socket
    Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

    // Start is called before the first frame update
    void Start()
    {

        try
        {
            // connect to server
            clientSocket.Connect(IPAddress.Parse(serverIP), port);
            Debug.Log("Connected to server.");

            // send confirmation msg to server
            string msg = "Hello, server.";
            byte[] msgBytes = Encoding.ASCII.GetBytes(msg);
            clientSocket.Send(msgBytes);
            Debug.Log("Sent msg");

            

            
            
        }
        catch (Exception ex)
        {
            Debug.Log("Error: " + ex.Message);
        }


    }

    // Update is called once per frame
    void Update()
    {
        try
        {
            string msg = "Sending message number " + i;
            byte[] msgBytes = Encoding.ASCII.GetBytes(msg);
            clientSocket.Send(msgBytes);
            Debug.Log("Sent msg");

            // receive data from server
            byte[] buffer = new byte[bufferSize];
            int bytesRead = clientSocket.Receive(buffer);
            string receivedMessage = Encoding.ASCII.GetString(buffer, 0, bytesRead);
            Debug.Log("Received msg: " + receivedMessage);
        }
        catch (Exception ex)
        {
            Debug.Log("Error: " + ex.Message);
        }

        i++;
    }

    private void OnApplicationQuit()
    {
        Debug.Log("Closing connection.");

        // close socket
        clientSocket.Shutdown(SocketShutdown.Both);
        clientSocket.Close();

        Debug.Log("Connection closed.");

    }
}