Today we will use the Native Wifi API and Delphi to enumerate all Wifi Networks availables. In this link you can find a translation of the headers.
I wrote this code using these headers. Tested in Delphi 2007 and Windows Vista.
Try this link for a fixed and updated version of the Native Wifi Delphi headers.
[sourcecode language=”delphi” wraplines=”false”]
{$APPTYPE CONSOLE}
uses
Windows,
SysUtils,
nduWlanAPI in ‘nduWlanAPI.pas’,
nduWlanTypes in ‘nduWlanTypes.pas’;
function DOT11_AUTH_ALGORITHM_To_String( Dummy :Tndu_DOT11_AUTH_ALGORITHM):AnsiString;
begin
Result:=”;
case Dummy of
DOT11_AUTH_ALGO_80211_OPEN : Result:= ‘80211_OPEN’;
DOT11_AUTH_ALGO_80211_SHARED_KEY : Result:= ‘80211_SHARED_KEY’;
DOT11_AUTH_ALGO_WPA : Result:= ‘WPA’;
DOT11_AUTH_ALGO_WPA_PSK : Result:= ‘WPA_PSK’;
DOT11_AUTH_ALGO_WPA_NONE : Result:= ‘WPA_NONE’;
DOT11_AUTH_ALGO_RSNA : Result:= ‘RSNA’;
DOT11_AUTH_ALGO_RSNA_PSK : Result:= ‘RSNA_PSK’;
DOT11_AUTH_ALGO_IHV_START : Result:= ‘IHV_START’;
DOT11_AUTH_ALGO_IHV_END : Result:= ‘IHV_END’;
end;
end;
function DOT11_CIPHER_ALGORITHM_To_String( Dummy :Tndu_DOT11_CIPHER_ALGORITHM):AnsiString;
begin
Result:=”;
case Dummy of
DOT11_CIPHER_ALGO_NONE : Result:= ‘NONE’;
DOT11_CIPHER_ALGO_WEP40 : Result:= ‘WEP40’;
DOT11_CIPHER_ALGO_TKIP : Result:= ‘TKIP’;
DOT11_CIPHER_ALGO_CCMP : Result:= ‘CCMP’;
DOT11_CIPHER_ALGO_WEP104 : Result:= ‘WEP104’;
DOT11_CIPHER_ALGO_WPA_USE_GROUP : Result:= ‘WPA_USE_GROUP OR RSN_USE_GROUP’;
//DOT11_CIPHER_ALGO_RSN_USE_GROUP : Result:= ‘RSN_USE_GROUP’;
DOT11_CIPHER_ALGO_WEP : Result:= ‘WEP’;
DOT11_CIPHER_ALGO_IHV_START : Result:= ‘IHV_START’;
DOT11_CIPHER_ALGO_IHV_END : Result:= ‘IHV_END’;
end;
end;
procedure Scan();
const
WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_ADHOC_PROFILES =$00000001;
var
hClient : THandle;
dwVersion : DWORD;
ResultInt : DWORD;
pInterface : Pndu_WLAN_INTERFACE_INFO_LIST;
i : Integer;
j : Integer;
pAvailableNetworkList: Pndu_WLAN_AVAILABLE_NETWORK_LIST;
pInterfaceGuid : PGUID;
SDummy : AnsiString;
begin
ResultInt:=WlanOpenHandle(1, nil, @dwVersion, @hClient);
try
if ResultInt<> ERROR_SUCCESS then
begin
WriteLn(‘Error Open CLient’+IntToStr(ResultInt));
Exit;
end;
ResultInt:=WlanEnumInterfaces(hClient, nil, @pInterface);
if ResultInt<> ERROR_SUCCESS then
begin
WriteLn(‘Error Enum Interfaces ‘+IntToStr(ResultInt));
exit;
end;
for i := 0 to pInterface^.dwNumberOfItems – 1 do
begin
Writeln(‘Interface ‘ + pInterface^.InterfaceInfo[i].strInterfaceDescription);
WriteLn(‘GUID ‘ + GUIDToString(pInterface^.InterfaceInfo[i].InterfaceGuid));
Writeln(”);
pInterfaceGuid:= @pInterface^.InterfaceInfo[pInterface^.dwIndex].InterfaceGuid;
ResultInt:=WlanGetAvailableNetworkList(hClient,pInterfaceGuid,WLAN_AVAILABLE_NETWORK_INCLUDE_ALL_ADHOC_PROFILES,nil,pAvailableNetworkList);
if ResultInt<> ERROR_SUCCESS then
begin
WriteLn(‘Error WlanGetAvailableNetworkList ‘+IntToStr(ResultInt));
Exit;
end;
for j := 0 to pAvailableNetworkList^.dwNumberOfItems – 1 do
Begin
WriteLn(Format(‘Profile %s’,[WideCharToString(pAvailableNetworkList^.Network[j].strProfileName)]));
SDummy:=PAnsiChar(@pAvailableNetworkList^.Network[j].dot11Ssid.ucSSID);
WriteLn(Format(‘NetworkName %s’,[SDummy]));
WriteLn(Format(‘Signal Quality %d ‘,[pAvailableNetworkList^.Network[j].wlanSignalQuality])+’%’);
//SDummy := GetEnumName(TypeInfo(Tndu_DOT11_AUTH_ALGORITHM),integer(pAvailableNetworkList^.Network[j].dot11DefaultAuthAlgorithm)) ;
SDummy:=DOT11_AUTH_ALGORITHM_To_String(pAvailableNetworkList^.Network[j].dot11DefaultAuthAlgorithm);
WriteLn(Format(‘Auth Algorithm %s ‘,[SDummy]));
SDummy:=DOT11_CIPHER_ALGORITHM_To_String(pAvailableNetworkList^.Network[j].dot11DefaultCipherAlgorithm);
WriteLn(Format(‘Auth Algorithm %s ‘,[SDummy]));
Writeln(”);
End;
end;
finally
WlanCloseHandle(hClient, nil);
end;
end;
begin
try
Scan();
Readln;
except
on E:Exception do
Writeln(E.Classname, ‘: ‘, E.Message);
end;
end.
[/sourcecode]
