C# Telnet 类库代码,谨献给还在寻找C# Telnet类库的兄弟
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C# Telnet 类库代码
今天给笔记本装了固态,速度提升很明显,很高兴,发个微博留作纪念。
自学的C#,干网络的,想弄个工具方便日常工作,想自己实现批量操作的工具。
想起来很简单做起来很费劲。网上一顿乱查。
这里感谢“Telnet 非常实用的类库 - 王小壮的博客 - CSDN博客”
https://blog.csdn.net/weixin_42183571/article/details/80783268
这个文章给了我方向,代码看了N遍,有了很多启发。
那里面的异步没看懂,当时不懂异步,看着和天数一样。。。。
什么协议都是有协商的过程:
telnet协商代码 取自 王小壮 ,有一小点的修改。
多了不BB,上代码。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace 项目名字
public class Telnet
#region // 协商的命令码直接复制
// private byte[] receivebytes = new byte[1024]; //接受
readonly Char IAC = Convert.ToChar(255);
readonly Char DO = Convert.ToChar(253);
readonly Char DONT = Convert.ToChar(254);
readonly Char WILL = Convert.ToChar(251);
readonly Char WONT = Convert.ToChar(252);
readonly Char SB = Convert.ToChar(250);
readonly Char SE = Convert.ToChar(240);
const Char IS = ‘0‘;
const Char SEND = ‘1‘;
const Char INFO = ‘2‘;
const Char VAR = ‘0‘;
const Char VALUE = ‘1‘;
const Char ESC = ‘2‘;
const Char USERVAR = ‘3‘;
private ArrayList m_ListOptions = new ArrayList();
enum Verbs WILL = 251, WONT = 252, DO = 253, DONT = 254, IAC = 255
enum Options RD = 1, SGA = 3
private Socket sock = null; // 定义全局变量,方便调用
//定义事件
private static ManualResetEvent connectDone = new ManualResetEvent(false);
private static ManualResetEvent receiveDone = new ManualResetEvent(false);
private static ManualResetEvent sendDone = new ManualResetEvent(false);
// private static ManualResetEvent waitDone = new ManualResetEvent(false);
// private string str_data = "";// 接受到的数据
private StringBuilder str_data = new StringBuilder();// 所有收到的数据
private StringBuilder Str_Temp = new StringBuilder();//单个命令的执行结果,不完整实际没有用
public bool Connected //连接状态
get
if (sock != null)
return sock.Connected;
else
return false;
// get return = sock.Connected;
// set;
public string RecData //取得执行的log
//get
// return str_data;
//
get
return str_data.ToString();
public string TempData //取得每个命令执行的log,有问题,没有用
//get
// return str_data;
//
get
return Str_Temp.ToString();
#endregion
public Telnet(string IP)
: this(IP, 23) //构造函数链
public Telnet(string IP, int port)// 工作主函数
//IPAddress ipAddress = IPAddress.Parse("192.168.56.2");
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
sock = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("connectDone.Rese : 设置为无信号开始连接");
connectDone.Reset();
sock.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), sock);// 异步连接
connectDone.WaitOne(10000, false);//异步阻断,连接成功就进入下异步,加入连接超时间10S,
if (!connectDone.WaitOne(10000, false))
sock.Close();//连接失败,超时退出;
Console.WriteLine("连接失败,超时退出");
else // 如果连接成功,开始接受数据。
//开始异步接受的线程
Thread threadread = new Thread(new ThreadStart(Receive));
threadread.Start();
/// <summary>
/// 用户名密码默认回显为“:”
/// </summary>
/// <param name="IP"></param>
/// <param name="port"></param>
/// <param name="username"></param>
/// <param name="passwd"></param>
public Telnet(string IP, int port,string username,string passwd)// 工作主函数
:this(IP, port, username, passwd, ":", ":") //这里的两个冒号是登录连接设备的回显,
public Telnet(string IP, int port, string username, string passwd,string usernamewait,string passwdwait)// 工作主函数
//IPAddress ipAddress = IPAddress.Parse("192.168.56.2");
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
sock = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("connectDone.Rese : 设置为无信号开始连接");
connectDone.Reset();
sock.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), sock);// 异步连接
connectDone.WaitOne(10000, false);
if (!connectDone.WaitOne(10000, false))
sock.Close();//连接失败,超时退出;
Console.WriteLine("连接失败,超时退出");
else // 如果连接成功,开始接受数据。
//开始异步接受的线程
Thread threadread = new Thread(new ThreadStart(Receive));
threadread.Start();
Send(usernamewait, username + "\r"); //自动连接配置,可以手动
Send(passwdwait, passwd + "\r");
public Telnet(string IP, int port,int timeout)// 工作主函数
//IPAddress ipAddress = IPAddress.Parse("192.168.56.2");
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
sock = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("connectDone.Rese : 设置为无信号开始连接");
connectDone.Reset();
sock.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), sock);// 异步连接
connectDone.WaitOne(timeout*1000, false);
if (!connectDone.WaitOne(timeout * 1000, false))
sock.Close();//连接失败,超时退出;
Console.WriteLine("连接失败,超时退出");
else // 如果连接成功,开始接受数据。
//开始异步接受的线程
Thread threadread = new Thread(new ThreadStart(Receive));
threadread.Start();
/// <summary>
/// 异步连接,异步回调
/// </summary>
/// <param name="ar"></param>
private void ConnectCallback(IAsyncResult ar)
try
// Retrieve the socket from the state object.
Socket client = (Socket)ar.AsyncState;
// Complete the connection.
client.EndConnect(ar);
//Console.WriteLine("Socket connected to 0",
// client.RemoteEndPoint.ToString());
//// Signal that the connection has been made.
Console.WriteLine(" connectDone.Set:设置为有信号");
connectDone.Set(); // 这里是把连接的事件作为 有信号,主函数中的阻断会继续执行,否则10s超时了
catch (Exception e)
Console.WriteLine("异步连接:" + e.ToString());
//这里是接受数据的方法
private void Receive()
try
// receiveDone.Reset();
//接受没有用阻断,这里用的是循环接受,是在回调中实现
// Create the state object.
// 这里是查了msdn文档,有这个,主要进是传递 这个辅助类中主要是传递 socke 与 state.buffer
StateObject state = new StateObject();
state.workSocket = sock;
// Begin receiving the data from the remote device.
sock.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
// receiveDone.WaitOne(10000,false);
//string ddd = string.Empty;
catch (Exception e)
Console.WriteLine(e.ToString());
//接受数据异步回调
private void ReceiveCallback(IAsyncResult ar)
try
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.workSocket;
//取得 sock 其实没必要,因为socket 是全局的变量
int bytesRead = client.EndReceive(ar);
if (bytesRead > 0)
////创建一个与接受 数据大小一致的 byte[]
Byte[] mToProcess = new Byte[bytesRead];
Array.Copy(state.buffer, mToProcess, bytesRead);//数组复制
Str_Temp = ProcessOptions(mToProcess);//清洗掉命令码,取得回显的实际数据
// Console.WriteLine("*********************************************");
Console.Write(Str_Temp);//回显本次的数据
// Console.WriteLine("*********************************************");
// response = mOutText;
str_data.Append(Str_Temp); //所有的数据,把每次的接受的数据添加到 str_data.用于后期保存log
string temps = str_data.ToString();//这里是测试每次取得数据的断点,懒得删
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
//下面进是循环取得数据的关键,每次接受完数据,又开始新的接受数据。
else
//这里是接受数据为0,正常异步接受到的数据为0时应该没有数据阻断状态,不会到这个地方。
Console.WriteLine("接受数据小于0:" + "发生异常");
client.Close();//关闭连接
catch (Exception e)
Console.WriteLine("接受数据异常" + e.ToString());//这里是抓取异常的代码。一般telnet结束时,异步还处理阻断状态,有时会发送,没啥用。
// 发送命令的方法,这里的data 是没有 \r 回车的,
public void Send(String data)
try
byte[] byteData = Encoding.ASCII.GetBytes(data);
//异步发送
sock.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), sock);
//异步阻断,发送完成后继续执行,未完成进一只阻断,可以加超时时间 sendDone.WaitOne(10000,false);
sendDone.WaitOne();
catch
Console.WriteLine("出现异常:0", data + "\r\n");
finally
//client.Shutdown(SocketShutdown);
public void Send(char data)
char[] char_data = data ;
try
byte[] byteData = Encoding.ASCII.GetBytes(char_data);
sock.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), sock);
sendDone.WaitOne();
catch
Console.WriteLine("出现异常:0", data + "\r\n");
finally
//client.Shutdown(SocketShutdown);
public void Send(char[] data)
try
byte[] byteData = Encoding.ASCII.GetBytes(data);
sock.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), sock);
sendDone.WaitOne();
catch
Console.WriteLine("出现异常:0", data + "\r\n");
finally
//client.Shutdown(SocketShutdown);
public void Send(byte[] byteData)
try
//byte[] byteData = Encoding.ASCII.GetBytes(data);
sock.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), sock);
sendDone.WaitOne();
catch
Console.WriteLine("发送出现异常bytedata:0", byteData.ToString() + "\r\n");
finally
//client.Shutdown(SocketShutdown);
/// <summary>
/// 执行命令的方法,判断回显字符,执行命令
/// </summary>
/// <param name="expect">回显字符串判断</param>
/// <param name="command">判定成功执行的命令</param>
/// <param name="delay">执行命令的延迟</param>
public void Send(string expect, string command, int delay_time)
// string local_data = string.Empty ;
int i = 0;
while (true)
//这里主要是判断 str_data 中的数据,接受的数据会持续写入到 这个中,接受可能有延迟,加循环判断,
if (str_data.ToString().TrimEnd().EndsWith(expect))
Thread.Sleep(delay_time);//执行命令的延迟
Send(command);
break;
else
// 增加命令执行代码判断失败的惩罚值,8次后,当前接受的数据中还没有出现判断的字符串,socket关闭
i++;
Thread.Sleep(1000);// 如果当前的接受数据中没有判断的字符出现,等待1s后再次判断
if(i==8)
//Console.WriteLine("命令执行错误,错误命令" + command + "命令执行结果:");// + str_data.ToString());
//Console.WriteLine();
// Console.WriteLine("命令执行错误,错误命令"+ command+"命令执行结果:" +str_data.ToString());
// str_data.Append("异常终结");
sock.Close ();
break;
//
/// <summary>
/// 执行命令的方法,默认延迟500ms。
/// </summary>
/// <param name="expect">回显字符串判断</param>
/// <param name="command">判定成功执行的命令</param>
public void Send(string expect, string command)
Send(expect, command, 100);
private static void SendCallback(IAsyncResult ar)
//异步发送数据
try
Socket client = (Socket)ar.AsyncState;
int bytesSent = client.EndSend(ar);
sendDone.Set();
catch (Exception e)
Console.WriteLine(e.ToString());
/// <summary>
/// 清洗命令码。telnet的核心代码
/// </summary>
/// <param name="resbyte"></param>
/// <returns></returns>
private StringBuilder ProcessOptions(byte[] resbyte)
//网络所得
string m_DISPLAYTEXT = "";
string m_strTemp = "";
//string m_strOption = "";
//string m_strNormalText = "";
StringBuilder m_strNormalText = new StringBuilder();
bool bScanDone = false;
int ndx = 0;
int ldx = 0;
char ch, canshu;
try
//把数据从byte[] 转化成string
for (int i = 0; i < resbyte.Length; i++)
Char ss = Convert.ToChar(resbyte[i]);
m_strTemp = m_strTemp + Convert.ToString(ss);
//此处意义为,当没描完数据前,执行扫描
while (bScanDone != true)
//获得长度
int lensmk = m_strTemp.Length;
//之后开始分析指令,因为每条指令为255 开头,故可以用此来区分出每条指令
ndx = m_strTemp.IndexOf(Convert.ToString(IAC));//首次出现IAC的位置
//此处为出错判断,本无其他含义
if (ndx > lensmk)
ndx = m_strTemp.Length;
//此处为,如果搜寻到IAC标记的telnet 指令,则执行以下步骤
if (ndx != -1)
#region 如果存在IAC标志位
// 将 标志位IAC 的字符 赋值给最终显示文字
m_DISPLAYTEXT += m_strTemp.Substring(0, ndx);
// 此处获得命令码
ch = m_strTemp[ndx + 1];//获取命令码
canshu = m_strTemp[ndx + 2];//获取命令码
//如果命令码是253(DO) 254(DONT) 521(WILL) 252(WONT) 的情况下
if (ch == DO || ch == DONT || ch == WILL || ch == WONT)
//将以IAC 开头3个字符组成的整个命令存储起来
//m_strOption = m_strTemp.Substring(ndx, 3);
//m_ListOptions.Add(m_strOption);
// 将 标志位IAC 的字符 赋值给最终显示文字
//m_DISPLAYTEXT += m_strTemp.Substring(0, ndx);
//将处理过的字符串删去
string txt = m_strTemp.Substring(ndx + 3);
m_strTemp = txt;
telnetproceess(ch, canshu);
//如果IAC后面又跟了个IAC (255)
else if (ch == IAC)
//则显示从输入的字符串头开始,到之前的IAC 结束
//m_DISPLAYTEXT += m_strTemp.Substring(0, ndx);
//之后将处理过的字符串排除出去
m_strTemp = m_strTemp.Substring(ndx + 1);
string xxc = m_strTemp;
//如果IAC后面跟的是SB(250)
else if (ch == SB)
//m_DISPLAYTEXT += m_strTemp.Substring(0, ndx);
ldx = m_strTemp.IndexOf(Convert.ToString(SE));
// m_strOption = m_strTemp.Substring(ndx, ldx);
//m_ListOptions.Add(m_strOption);
m_strTemp = m_strTemp.Substring(ldx + 1);
telnetproceess(ch, canshu);
#endregion
//若字符串里已经没有IAC标志位了
else
//显示信息累加上m_strTemp存储的字段
m_DISPLAYTEXT = m_DISPLAYTEXT + m_strTemp;
bScanDone = true;
//输出人看到的信息
m_strNormalText.Append(m_DISPLAYTEXT);
catch (Exception eP)
throw new Exception("解析传入的字符串错误:" + eP.Message);
return m_strNormalText;
//异步委托调用,这里是协商代码,测试很多设备 占时没发现什么问题
private void telnetproceess(char ch, char canshu)
//如果命令码是253(DO) 254(DONT) 251(WILL) 252(WONT) 的情况下
if (ch == DO)//253 对端设备对本端设备的发出参数请求(如果支持对方的,则DO确认,不支持则DONT)
if (canshu == 32 || canshu == 35 || canshu == 39 || canshu == 36)
//发送命令码
byte[] sendcom = new byte[3];
sendcom[0] = 255;
sendcom[1] = 252;
sendcom[2] = Convert.ToByte(canshu);
//tcpSocket.Send(sendcom);
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
else if (canshu == 24)
//byte[] sendcom = 255, 240, 78, 65, 87, 83, 32, 8, 0, 32, 2, 5, 255, 240 ;
byte[] sendcom = 255, 251, 24 ;
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
else if (canshu == 31)
/*
255 250 31 window size
255 240 开始
recv SB N78A65W87S83 8(56)0(48) 2(50)5(53)
*/
byte[] sendcom1 = 255, 251, 31 ;//同意窗口大小请求
Send(sendcom1);
//steam.Write(sendcom1, 0, sendcom1.Length);
byte[] sendcom = 255, 250, 31, 0, 80, 0, 25, 255, 240 ;//发送窗口大小
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
//byte[] sendcoms = 255, 250, 31,78, 65,87,83, 32,56,48,32,50,53,255,240;
//byte[] sendcoms = 255, 250, 31, 78, 65, 87, 83, 255, 240 ;
//sock.Send(sendcoms);
else if (canshu == 33)
else if (canshu == 1 || canshu == 34)
// 255 252 1 echo
byte[] sendcom = 255, 252, Convert.ToByte(canshu) ;
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
else
string cuowu = canshu.ToString();//
string xx;//拍错用
else if (ch == DONT)//254 协商对端设备的参数(对端发出对本端参数的请求)
else if (ch == WILL)//251 本端设备的参数(发送给对方)
if (canshu == 3)
else if (canshu == 1 || canshu == 3)
//255 253 echo;
byte[] sendcom = 255, 253, Convert.ToByte(canshu) ;
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
else
//255 254 status
byte[] sendcom = 255, 254, Convert.ToByte(canshu) ;
//steam.Write(sendcom, 0, sendcom.Length);
Send(sendcom);
else if (ch == WONT)//252 本端设备的参数(发送给对方)
else if (ch == 250)
if (canshu == 24)
//byte[] sendcom = 255, 254, Convert.ToByte(canshu) ;
// recv SB 24 0 ANSI
byte[] sendcom = 255, 250, 24, 0, 65, 78, 83, 73, 255, 240 ;//发送终端编码send SB 24 0 ANSI
Send(sendcom);
//steam.Write(sendcom, 0, sendcom.Length);
// recv SB 65 87 S[Unrecognized]
//recv SB NAWS 80 25
// IAC,SB,24,0,‘I‘,‘B‘,‘M‘,‘P‘,‘C‘, IAC,SE
/// <summary>
/// 保存log文件.这里个人需要,操作的就是本次的 str_data
/// </summary>
/// <param name="FilePathName">绝对文件路径</param>
public void Save_File(string FilePathName)
string[] Str_dir = FilePathName.Split(‘\\‘);
string FilePath_Dir = string.Empty;
for (int i = 0; i < Str_dir.Length - 1; i++)
FilePath_Dir += Str_dir[i] + "\\";
string FileName = Str_dir[Str_dir.Length - 1];
Save_File(FilePath_Dir, FileName);
/// <summary>
/// 判断文件或目录是否存在
/// </summary>这是保存到当前程序运行到目录以今天日期生成目录
/// <param name="FilePath_Dir">目录</param>
/// <param name="FileName">文件名称</param>
private void File_Exists(string FilePath_Dir, string FileName)
string FilePathName = FilePath_Dir + "\\" + FileName;
// string path = FilePath_Dir + "\\" + DateTime.Now.ToString("yyyy-MM-dd") + "\\" + FilePathName + ".txt";
if (!Directory.Exists(FilePath_Dir))
Directory.CreateDirectory(FilePath_Dir);
if (!File.Exists(FilePathName))
FileStream fs = File.Create(FilePathName);
fs.Close();
/// <summary>
/// 保存文件
/// </summary>
/// <param name="FilePath_Dir">文件的目录</param>
/// <param name="FileName">文件的名称</param>
public void Save_File(string FilePath_Dir, string FileName)//保存文件函数
string FilePathName = FilePath_Dir + "\\" + FileName;
File_Exists(FilePath_Dir, FileName);
StreamWriter steam = new StreamWriter(FilePathName, true, Encoding.UTF8);
steam.Write(str_data);
steam.Close();
public void close()
try
sock.Shutdown(SocketShutdown.Both);
sock.Close();
catch
//辅助类传递 接收数据,与socket
public class StateObject
// Client socket.
public Socket workSocket = null;
// Size of receive buffer.
public const int BufferSize = 1024;
// Receive buffer.
public byte[] buffer = new byte[BufferSize];
// Received data string.
public StringBuilder sb = new StringBuilder();
public string waitfor = string.Empty;
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