Question

我试图批量生成Windows的本机IRC客户端。您可以通过telnet连接到IRC服务器，但是您必须非常快地键入您的用户并且缺口，否则服务器将断开连接

SET /P server=[Server Address: ]
telnet %server% 6667

SET /P user=[Username/nick:]
echo "USER %user% 8 * : %user%"
echo "NICK %user%"

程序将连接到指定的服务器，但我无法将用户和nick命令回显给服务器。

Answer 1

Windows内置的telnet客户端不是scriptabe。

试试这个（它是一个自编译的bat / c＃脚本，应该使用.bat扩展名保存。它来自here）：

// 2>nul||@goto :batch
/*
:batch
@echo off
setlocal

::delete line when ready
del %~n0.exe >nul 2>nul


:: find csc.exe
set "csc="
for /r "%SystemRoot%\Microsoft.NET\Framework\" %%# in ("*csc.exe") do  set "csc=%%#"

if not exist "%csc%" (
   echo no .net framework installed
   exit /b 10
)

if not exist "%~n0.exe" (
   call %csc% /nologo /warn:0 /out:"%~n0.exe" "%~dpsfnx0" || (
      exit /b %errorlevel% 
   )
)
%~n0.exe %*
endlocal & exit /b %errorlevel%

*/

// minimalistic telnet implementation
// conceived by Tom Janssens on 2007/06/06  for codeproject
//
// http://www.corebvba.be



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

namespace MinimalisticTelnet
{
    enum Verbs {
        WILL = 251,
        WONT = 252,
        DO = 253,
        DONT = 254,
        IAC = 255
    }

    enum Options
    {
        SGA = 3
    }

    class TelnetConnection
    {
        TcpClient tcpSocket;

        int TimeOutMs = 100;

        public TelnetConnection(string Hostname, int Port)
        {
            tcpSocket = new TcpClient(Hostname, Port);

        }

        public string Login(string Username,string Password,int LoginTimeOutMs)
        {
            int oldTimeOutMs = TimeOutMs;
            TimeOutMs = LoginTimeOutMs;
            string s = Read();
            if (!s.TrimEnd().EndsWith(":"))
               throw new Exception("Failed to connect : no login prompt");
            WriteLine(Username);

            s += Read();
            if (!s.TrimEnd().EndsWith(":"))
                throw new Exception("Failed to connect : no password prompt");
            WriteLine(Password);

            s += Read();
            TimeOutMs = oldTimeOutMs;
            return s;
        }

        public void WriteLine(string cmd)
        {
            Write(cmd + "\n");
        }

        public void Write(string cmd)
        {
            if (!tcpSocket.Connected) return;
            byte[] buf = System.Text.ASCIIEncoding.ASCII.GetBytes(cmd.Replace("\0xFF","\0xFF\0xFF"));
            tcpSocket.GetStream().Write(buf, 0, buf.Length);
        }

        public string Read()
        {
            if (!tcpSocket.Connected) return null;
            StringBuilder sb=new StringBuilder();
            do
            {
                ParseTelnet(sb);
                System.Threading.Thread.Sleep(TimeOutMs);
            } while (tcpSocket.Available > 0);
            return sb.ToString();
        }

        public bool IsConnected
        {
            get { return tcpSocket.Connected; }
        }

        void ParseTelnet(StringBuilder sb)
        {
            while (tcpSocket.Available > 0)
            {
                int input = tcpSocket.GetStream().ReadByte();
                switch (input)
                {
                    case -1 :
                        break;
                    case (int)Verbs.IAC:
                        // interpret as command
                        int inputverb = tcpSocket.GetStream().ReadByte();
                        if (inputverb == -1) break;
                        switch (inputverb)
                        {
                            case (int)Verbs.IAC: 
                                //literal IAC = 255 escaped, so append char 255 to string
                                sb.Append(inputverb);
                                break;
                            case (int)Verbs.DO: 
                            case (int)Verbs.DONT:
                            case (int)Verbs.WILL:
                            case (int)Verbs.WONT:
                                // reply to all commands with "WONT", unless it is SGA (suppres go ahead)
                                int inputoption = tcpSocket.GetStream().ReadByte();
                                if (inputoption == -1) break;
                                tcpSocket.GetStream().WriteByte((byte)Verbs.IAC);
                                if (inputoption == (int)Options.SGA )
                                    tcpSocket.GetStream().WriteByte(inputverb == (int)Verbs.DO ? (byte)Verbs.WILL:(byte)Verbs.DO); 
                                else
                                    tcpSocket.GetStream().WriteByte(inputverb == (int)Verbs.DO ? (byte)Verbs.WONT : (byte)Verbs.DONT); 
                                tcpSocket.GetStream().WriteByte((byte)inputoption);
                                break;
                            default:
                                break;
                        }
                        break;
                    default:
                        sb.Append( (char)input );
                        break;
                }
            }
        }


        ////
        static void Main(string[] args)
        {

            string server=args[0];
            int port= Int32.Parse(args[1]);

            string user=args[2];
            string password=args[3];

            string command=args[4];
            //create a new telnet connection to hostname "gobelijn" on port "23"
            TelnetConnection tc = new TelnetConnection(server, port);


            //login with user "root",password "rootpassword", using a timeout of 100ms, and show server output
            string s="";
            string prompt = "";
            try{
                s = tc.Login(user, password,100);
                Console.Write(s);

                // server output should end with "$" or ">", otherwise the connection failed
                prompt = s.TrimEnd();
                prompt = s.Substring(prompt.Length -1,1);
                if (prompt != "$" && prompt != ">" )
                    throw new Exception("Connection failed");
            }catch(Exception e){

            }





            // while connected
            while (tc.IsConnected && prompt.Trim() != "exit" )
            {
                // display server output
                Console.Write(tc.Read());

                // send client input to server
                //prompt = Console.ReadLine();
                try{
                    tc.WriteLine(command);

                    // display server output
                    Console.Write(tc.Read());
                }catch(Exception ex){

                }
            }
            Console.WriteLine("***DISCONNECTED");
            //Console.ReadLine();
        }

        ////
    }
}

并使用它：

telnetcs.bat localhost 21 admin password command

测试非常有限，脚本不是故障安全的，但是如果你能发送命令就可以改进它。

有没有办法让批处理文件向开放的telnet连接发送信息？

1 个答案: