[Delphi] Fce na zjisteni sitove masky k IP v pocitaci

[MEluZíNa]

Zdravim,

zkus se podivat sem http://msdn2.microsoft.com/en-us/library/aa365917.aspx

Je tam i skoro komplet priklad. Obaleni do object pascalu jako domaci cviceni

[Helium]

Nasel jsem toto:

unit USock;

interface

uses Windows, Winsock, Classes;

{

This function enumerates all TCP/IP interfaces and
returns a CRLF separated string containing:

IP, NetMask, BroadCast-Address, Up/Down status,
Broadcast support, Loopback

If you feed this string to a wide TMEMO (to its memo.lines.text
property) you will see cleary the results.

To use this you need Win98/ME/2K, 95 OSR 2 or NT service
pack #3 because WinSock 2 is used (WS2_32.DLL)

}


function IsIeUsingOnlineMode : boolean;
function IsUserOnline : boolean;
function IsIpPresent : boolean;
function IsOnlineRas : Boolean;


function EnumInterfaces(var sInt: string): Boolean;




{ Imported function WSAIOCtl from Winsock 2.0 - Winsock 2 is }
{ available only in Win98/ME/2K and 95 OSR2, NT srv pack #3 }

function WSAIoctl(s: TSocket; cmd: DWORD; lpInBuffer: PCHAR; dwInBufferLen:
DWORD;
lpOutBuffer: PCHAR; dwOutBufferLen: DWORD;
lpdwOutBytesReturned: LPDWORD;
lpOverLapped: POINTER;
lpOverLappedRoutine: POINTER): Integer; stdcall; external 'WS2_32.DLL';

{ Constants taken from C header files }

const SIO_GET_INTERFACE_LIST = $4004747F;
IFF_UP = $00000001;
IFF_BROADCAST = $00000002;
IFF_LOOPBACK = $00000004;
IFF_POINTTOPOINT = $00000008;
IFF_MULTICAST = $00000010;

type sockaddr_gen = packed record
AddressIn: sockaddr_in;
filler: packed array[0..7] of char;
end;

type INTERFACE_INFO = packed record
iiFlags: u_long; // Interface flags
iiAddress: sockaddr_gen; // Interface address
iiBroadcastAddress: sockaddr_gen; // Broadcast address
iiNetmask: sockaddr_gen; // Network mask
end;


implementation


{-------------------------------------------------------------------

1. Open WINSOCK
2. Create a socket
3. Call WSAIOCtl to obtain network interfaces
4. For every interface, get IP, MASK, BROADCAST, status
5. Fill a CRLF separated string with this info
6. Finito

--------------------------------------------------------------------}

function EnumInterfaces(var sInt: string): Boolean;
var s: TSocket;
wsaD: WSADATA;
NumInterfaces: Integer;
BytesReturned, SetFlags: u_long;
pAddrInet: SOCKADDR_IN;
pAddrString: PCHAR;
PtrA: pointer;
Buffer: array[0..20] of INTERFACE_INFO;
i: Integer;
begin
result := true; // Initialize
sInt := '';

WSAStartup($0101, wsaD); // Start WinSock
// You should normally check
// for errors here

s := Socket(AF_INET, SOCK_STREAM, 0); // Open a socket
if (s = INVALID_SOCKET) then exit;

try // Call WSAIoCtl
PtrA := @bytesReturned;
if (WSAIoCtl(s, SIO_GET_INTERFACE_LIST, nil, 0, @Buffer, 1024, PtrA, nil,
nil)
<> SOCKET_ERROR)
then
begin // If ok, find out how
// many interfaces exist

NumInterfaces := BytesReturned div SizeOf(INTERFACE_INFO);

for i := 0 to NumInterfaces - 1 do // For every interface
begin
pAddrInet := Buffer[i].iiAddress.addressIn; // IP ADDRESS
pAddrString := inet_ntoa(pAddrInet.sin_addr);
sInt := sInt + ' IP=' + pAddrString + ',';


pAddrInet := Buffer[i].iiNetMask.addressIn; // SUBNET MASK
pAddrString := inet_ntoa(pAddrInet.sin_addr);
sInt := sInt + ' Mask=' + pAddrString + ',';
pAddrInet := Buffer[i].iiBroadCastAddress.addressIn; // Broadcast addr
pAddrString := inet_ntoa(pAddrInet.sin_addr);
sInt := sInt + ' Broadcast=' + pAddrString + ',';

SetFlags := Buffer[i].iiFlags;
if (SetFlags and IFF_UP) = IFF_UP then
sInt := sInt + ' Interface UP,' // Interface up/down
else
sInt := sInt + ' Interface DOWN,';

if (SetFlags and IFF_BROADCAST) = IFF_BROADCAST then // Broadcasts
sInt := sInt + ' Broadcasts supported,' // supported or
else // not supported
sInt := sInt + ' Broadcasts NOT supported,';

if (SetFlags and IFF_LOOPBACK) = IFF_LOOPBACK then // Loopback or
sInt := sInt + ' Loopback interface'
else
sInt := sInt + ' Network interface'; // normal

sInt := sInt + #13#10; // CRLF between
// each interface
end;
end;
except
end;
//
// Close sockets
//
CloseSocket(s);
WSACleanUp;
result := false;
end;

function IsIpPresent : boolean;
type
TApInAddr = array [0..10] of PInAddr;
PApInAddr = ^TApInAddr;
var
Phe : PHostEnt;
Pptr : PApInAddr;
Buf : array [0..63] of char;
i : Integer;
GInitData : TWsaData;
Ip : string;
begin
Result := FALSE;
WsaStartup ($101, GInitData);
GetHostName (Buf, SizeOf(Buf));
Phe := GetHostByName (Buf);
if Phe = nil then
Exit;
Pptr := PApInAddr(Phe^.h_addr_list);
i := 0;
while Pptr^[i] <> nil do
begin
Ip := inet_ntoa(Pptr^[i]^);
Inc(i);
end;
WsaCleanup;
Result := (Ip <> '') and (Ip <> '127.0.0.1');
end;

//--------------------------------------------------------------------------


function IsOnlineRas : boolean;
const
REG_RAS_BASE = 'System\CurrentControlSet\Services\RemoteAccess';
REG_RAS_RC = 'Remote Connection';
var
OpenKey : HKEY;
DataType,
DataSize,
Buf : DWORD;
begin
Result := FALSE;
if RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_RAS_BASE,
REG_OPTION_NON_VOLATILE,
KEY_READ, OpenKey) = ERROR_SUCCESS then
begin
DataType := REG_BINARY;
DataSize := SizeOf(Buf);
if RegQueryValueEx (OpenKey, REG_RAS_RC, nil, @DataType, @Buf,
@DataSize) =
ERROR_SUCCESS then
Result := (Buf = 1);
RegCloseKey (OpenKey);
end;
end;

//--------------------------------------------------------------------------


function IsIeUsingOnlineMode : boolean;
var
InetIsOffline : function (dwFlags : DWORD) : bool; stdcall;
HLib : THandle;

function GetBasicOsVer : integer;
var
VerInfo : TOsVersionInfo;
begin
VerInfo.dwOSVersionInfoSize := SizeOf(TOsVersionInfo);
if GetVersionEx (VerInfo) then
begin
case VerInfo.dwPlatformId of
VER_PLATFORM_WIN32_WINDOWS : Result := 1;
VER_PLATFORM_WIN32_NT : Result := 2;
else
Result := 0;
end;
end
else
Result := 0;
end;

//
// Win9x stores the InetIsOffline API in SHELL32.DLL while NT stores it in
// URL.DLL
//
function GetProperLibHandle : THandle;
begin
case GetBasicOsVer of
1 : Result := LoadLibrary ('SHELL32.DLL');
2 : Result := LoadLibrary ('URL.DLL');
else
Result := INVALID_HANDLE_VALUE;
end;
end;

begin
Result := FALSE;
HLib := GetProperLibHandle;
if HLib <> INVALID_HANDLE_VALUE then
try
@InetIsOffline := GetProcAddress (HLib, 'InetIsOffline');
if @InetIsOffline <> nil then
Result := not (InetIsOffline (0));
finally
FreeLibrary (HLib);
end;
end;

//--------------------------------------------------------------------------


function IsUserOnline : boolean;
begin
Result := IsIpPresent or IsOnlineRas or IsIeUsingOnlineMode;
end;


end.

ma jednu vadu, otevira to WinSock, ktery mam jiz otevreny jinymi VCL knihovnami.