向某个端口发送UDP消息

Mono_UDP_Send.cs

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using Sirenix.OdinInspector;
using UnityEngine;

namespace Code.Dev.Network
{
    public class Test_UDP_Send : MonoBehaviour
    {
        public string overrideIP;

        public int port; // define in init
        public string strMessage = "AA";

        public string hostName;

        [Button("Send IP", ButtonSizes.Large)]
        private void SendStringIP()
        {
            try
            {
                var remoteEndPoint = new IPEndPoint(IPAddress.Parse(overrideIP), port);
                var client = new UdpClient();

                byte[] data = Encoding.UTF8.GetBytes(strMessage);
                client.Send(data, data.Length, remoteEndPoint);
            }
            catch (Exception err)
            {
                print(err.ToString());
            }
        }


        [Button("Send 域名", ButtonSizes.Large)]
        private void SendString()
        {
            try
            {
                var remoteEndPoint = GetIPEndPointFromHostName(hostName, port, true);
                var client = new UdpClient();

                byte[] data = Encoding.UTF8.GetBytes(strMessage);
                client.Send(data, data.Length, remoteEndPoint);
            }
            catch (Exception err)
            {
                print(err.ToString());
            }
        }

        [Button("Local Test", ButtonSizes.Large)]
        private void SendLocalString()
        {
            try
            {
                var remoteEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7777);
                var client = new UdpClient();

                byte[] data = Encoding.UTF8.GetBytes("LocalTest->" + strMessage);
                client.Send(data, data.Length, remoteEndPoint);
            }
            catch (Exception err)
            {
                print(err.ToString());
            }
        }


        public static IPEndPoint GetIPEndPointFromHostName(string hostName, int port, bool throwIfMoreThanOneIP)
        {
            var addresses = System.Net.Dns.GetHostAddresses(hostName);
            if (addresses.Length == 0)
            {
                throw new ArgumentException(
                    "Unable to retrieve address from specified host name.",
                    "hostName"
                );
            }
            else if (throwIfMoreThanOneIP && addresses.Length > 1)
            {
                throw new ArgumentException(
                    "There is more that one IP address to the specified host.",
                    "hostName"
                );
            }

            Debug.Log($"Host {hostName} IP is {addresses[0]}");
            return new IPEndPoint(addresses[0], port); // Port gets validated here.
        }
    }
}