using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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namespace HH.WCS.Mobox3.WeiLi.device
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{
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public class TcpServer
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{
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public TcpServer(string ip) {
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Init(ip);
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}
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private void Init(string ip) {
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//创建一个新的Socket,这里我们使用最常用的基于TCP的Stream Socket（流式套接字）
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var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
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try {
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//将该socket绑定到主机上面的某个端口，端口应该放到配置文件中
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socket.Bind(new IPEndPoint(IPAddress.Parse(ip), 2023));
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Console.WriteLine(2023);
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//启动监听，并且设置一个最大的队列长度
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socket.Listen(30);
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//开始接受客户端连接请求
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socket.BeginAccept(new AsyncCallback(ClientAccepted), socket);
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}
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catch (Exception e) {
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Console.WriteLine(e.Message);
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}
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}
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public static Dictionary<string, Socket> clients = new Dictionary<string, Socket>();
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public static Dictionary<string, byte[]> buffers = new Dictionary<string, byte[]>();
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public static void ClientAccepted(IAsyncResult ar) {
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var socket = ar.AsyncState as Socket;
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var client = socket.EndAccept(ar);
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string remote_ip = ((System.Net.IPEndPoint)client.RemoteEndPoint).Address.ToString();
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if (clients.Keys.Contains(remote_ip)) {
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clients[remote_ip] = client;
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}
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else {
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clients.Add(remote_ip, client);
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}
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if (!buffers.Keys.Contains(remote_ip)) {
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buffers.Add(remote_ip, new byte[1024]);
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}
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//给客户端发送一个欢迎消息
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//client.Send(Encoding.Unicode.GetBytes("Hi there, I accept you request at " + DateTime.Now.ToString()));
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Console.WriteLine(remote_ip);
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try {
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client.BeginReceive(buffers[remote_ip], 0, buffers[remote_ip].Length, SocketFlags.None, new AsyncCallback(ReceiveMessage), client);
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}
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catch (Exception ex) {
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Console.WriteLine($"【接收客户端的消息异常】：" + ex.Message);
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}
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//准备接受下一个客户端请求
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socket.BeginAccept(new AsyncCallback(ClientAccepted), socket);
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}
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public static void ReceiveMessage(IAsyncResult ar) {
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try {
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var socket = ar.AsyncState as Socket;
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string remote_ip = ((System.Net.IPEndPoint)socket.RemoteEndPoint).Address.ToString();
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var length = socket.EndReceive(ar);
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if (length == 0) {
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clients.Remove(remote_ip);
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buffers.Remove(remote_ip);
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return;
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}
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else {
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if (!clients.Keys.Contains(remote_ip)) {
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clients.Add(remote_ip, socket);
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}
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if (!buffers.Keys.Contains(remote_ip)) {
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buffers.Add(remote_ip, new byte[1024]);
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}
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}
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try {
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if (buffers.Keys.Contains(remote_ip)) {
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//读取出来消息内容
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var message = GetHexString(buffers[remote_ip], length);//16 10
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Console.WriteLine(message);
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if (message.Substring(0, 4) == "3f00" && message.Substring(message.Length - 4) == "0d0a") {
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//显示消息
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string msg = message.Replace(@"0d", "").Replace(@"0a", "").Replace(@"0d0a", "").Trim();
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PlcHelper.Receive(remote_ip, msg);
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Array.Clear(buffers[remote_ip], 0, buffers[remote_ip].Length);//清空当前IP Buffer
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}
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else {
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Console.WriteLine($"【TCP信息协议异常】：IP：{remote_ip},MSG：{message}");
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}
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}
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else {
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if (!buffers.Keys.Contains(remote_ip)) {
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buffers.Add(remote_ip, new byte[1024]);
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}
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}
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}
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catch (Exception ex) {
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Console.WriteLine($"【处理客户端的消息异常】：" + ex.Message);
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}
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//接收下一个消息(因为这是一个递归的调用，所以这样就可以一直接收消息了）
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socket.BeginReceive(buffers[remote_ip], 0, buffers[remote_ip].Length, SocketFlags.None, new AsyncCallback(ReceiveMessage), socket);
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}
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catch (Exception ex) {
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Console.WriteLine(ex.Message);
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}
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}
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private static string GetHexString(byte[] buffer, int lenght) {
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return BitConverter.ToString(buffer, 0, lenght).Replace("-", string.Empty).ToLower();
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}
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public static bool TcpServerSend(string ip, byte[] msg) {
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if (clients.Keys.Contains(ip)) {
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var client = clients[ip];
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if (client.Connected) {
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try {
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client.Send(msg);
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return true;
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}
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catch (SocketException ex) {
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Console.WriteLine(ex.Message);
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clients[ip].Close();
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clients.Remove(ip);
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}
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}
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else {
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clients[ip].Close();
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clients.Remove(ip);
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}
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}
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else {
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Console.WriteLine("未找到设备的链接：" + ip);
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}
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return false;
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}
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}
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}
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