Демонстрационная программа сканирования сети

////////////////////////////////////////////////////////////////////////////////
//
//  Демонстрационная программа сканирования сети на основе
//  WNetOpenEnum, WNetEnumResource, WNetCloseEnum
//
//  Автор: Александр (Rouse_) Багель
//  mailto:rouse79@yandex.ru
//
//  Специально для форумов Мастера Дельфи и Исходники.RU
//  http://www.delphimaster.ru
//  http://forum.sources.ru
//
 
unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, Winsock, ImgList, ShellAPI;
 
const
  STR_START    =  'Начать сканирование';
  STR_STOP     =  'Остановить сканирование';
  STR_STARTED  =  '   Идет сканирование ...';
  STR_STOPPED  =  '   Сканирование завершено ...';
  STR_END      =  '   Завершение потока ...';
  STR_FIELD    =  '   Поле не выбрано ...';
 
type
  TDemoThread = class(TThread)
  private
    TreeNetWrk: TTreeNode;
    TreeDomain: TTreeNode;
    TreeServer: TTreeNode;
    TreeShares: TTreeNode;
    Param_dwType: Byte;
    Param_dwDisplayType: Byte;
    Param_lpRemoteName: String;
    Param_lpIP: String;
  protected
    procedure Execute; override;
    procedure Scan(Res: TNetResource; Root: boolean);
    procedure AddElement;
    procedure Stop;
  end;
 
  TForm1 = class(TForm)
    Button1: TButton;
    TreeView1: TTreeView;
    StatusBar1: TStatusBar;
    ImageList1: TImageList;
    procedure Button1Click(Sender: TObject);
    procedure TreeView1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure TreeView1DblClick(Sender: TObject);
  private
    Thread: TDemoThread;
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
function GetIPAddress(NetworkName: String): String;
var
 Error: DWORD;
 HostEntry: PHostEnt;
 Data: WSAData;
 Address: In_Addr;
begin
  Delete(NetworkName, 1, 2);
  Error:=WSAStartup(MakeWord(1, 1), Data);
  if Error = 0 then
  begin
    HostEntry:=gethostbyname(PChar(NetworkName));
    Error:=GetLastError;
    if Error = 0 then
    begin
      Address:=PInAddr(HostEntry^.h_addr_list^)^;
      Result:=inet_ntoa(Address);
    end
    else
     Result:='Unknown';
  end
  else
    Result:='Error';
  WSACleanup;
end;
 
{ TDemoThread }
 
procedure TDemoThread.Execute;
var
  R:TNetResource;
begin
  inherited;
  Priority := tpIdle;
  FreeOnTerminate := True;
  Resume;
  Scan(R, True);
  TreeDomain := nil;
  TreeServer := nil;
  Synchronize(Stop);
end;
 
procedure TDemoThread.Scan(Res: TNetResource; Root: boolean);
var
 hEnum: Cardinal;
 nrResource: array[0..512] of TNetResource;
 dwSize: DWORD;
 numEntries: DWORD;
 I: DWORD;
 dwResult: DWORD;
begin
  if Root then
    dwResult := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY,
      0, nil, hEnum)
  else
    dwResult := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY,
      0, @Res, hEnum);
  if dwResult = NO_ERROR then
  begin
    dwSize := SizeOf(nrResource);
    numEntries := DWORD(-1);                                   // ERROR_NO_MORE_ITEMS
    if WNetEnumResource(hEnum, numEntries, @nrResource, dwSize) = NO_ERROR then
    begin
      for i := 0 to numEntries - 1 do
      begin
        if Terminated then Break;
        with nrResource[i] do
        begin
          Param_dwType := dwType;
          Param_dwDisplayType := dwDisplayType;
          Param_lpRemoteName := lpRemoteName;
          if Param_dwDisplayType = RESOURCEDISPLAYTYPE_SERVER then
            Param_lpIP := GetIPAddress(Param_lpRemoteName);
        end;
        if Assigned(nrResource[i].lpRemoteName) then
          Synchronize(AddElement);
        Scan(nrResource[i], false);
      end;
    WNetCloseEnum(hEnum);
    end;
  end;
end;
 
procedure TDemoThread.AddElement;
begin
  Application.ProcessMessages;
  case Param_dwDisplayType of
    RESOURCEDISPLAYTYPE_NETWORK:
    begin
      TreeNetWrk := Form1.TreeView1.Items.Add(nil, Param_lpRemoteName);
      TreeNetWrk.StateIndex := 1;
    end;
    RESOURCEDISPLAYTYPE_DOMAIN:
    begin
      TreeDomain := Form1.TreeView1.Items.AddChild(TreeNetWrk, Param_lpRemoteName);
      TreeDomain.StateIndex := 2;
    end;
    RESOURCEDISPLAYTYPE_SERVER:
    begin
      TreeServer := Form1.TreeView1.Items.AddChild(TreeDomain, Param_lpRemoteName + ' IP: ' + Param_lpIP);
      TreeServer.StateIndex := 3;
    end;
    RESOURCEDISPLAYTYPE_SHARE:
    begin
      TreeShares := Form1.TreeView1.Items.AddChild(TreeServer, Param_lpRemoteName);
      TreeShares.StateIndex := 3 + Param_dwType;
    end;
  end;
end;
 
procedure TDemoThread.Stop;
begin
  Form1.StatusBar1.Panels[1].Text := STR_STOPPED;
  Form1.Button1.Caption := STR_START;
  Form1.Button1.Enabled := True;
  Form1.Tag := 0;
end;
 
{ TForm1 }
 
procedure TForm1.FormCreate(Sender: TObject);
begin
  Tag := 0;
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  Tag := Tag + 1;
  if (Tag mod 2) = 1 then
  begin
    TreeView1.Items.Clear;
    StatusBar1.Panels[1].Text := STR_STARTED;
    Button1.Caption := STR_STOP;
    Thread := TDemoThread.Create(False);
  end
  else
  begin
    StatusBar1.Panels[1].Text := STR_END;
    Button1.Enabled := False;
    Thread.Terminate;
  end;
end;
 
procedure TForm1.TreeView1Click(Sender: TObject);
begin
  if Assigned(TreeView1.Selected) then
    StatusBar1.Panels[0].Text := '   ' + TreeView1.Selected.Text
  else
    StatusBar1.Panels[0].Text := STR_FIELD;
end;
 
procedure TForm1.TreeView1DblClick(Sender: TObject);
var
  Str: String;
begin
  if Assigned(TreeView1.Selected) then
  begin
    Str := TreeView1.Selected.Text;
    if Copy(Str, 1, 2) <> '\\' then Exit;
    if Pos(' IP:', Str) <> 0 then
      ShellExecute(Handle, 'explore', PChar(Copy(Str, 1, Pos(' IP:', Str))), nil, nil, SW_SHOW)
    else
      ShellExecute(Handle, 'explore', PChar(Str), nil, nil, SW_SHOW);
  end;
end;
 
end.

Оригинал доступен по следующему адресу: https://rouse.front.ru/netscan.zip

Автор: Rouse_

Взято из https://forum.sources.ru