Question

how to STOP an Internet connection

Asked by: LeVuHoang

Applications want to connect to internet by Dialup Modem almost use RASAPI32.DLL and RasDialA function.
How can I STOP an UNKNOWN connection BEFORE modem dialup ?

My Idea :
Hook function RasDialA in RASAPI32.DLL but unsuccessful because if a program was packed, it doesn't effect.

Who have an ideas ?

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Asked On
2003-11-12 at 06:01:52ID20795531
Tags

rasdiala

Topic

Delphi Programming

Participating Experts
2
Points
125
Comments
5

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Answers

 

by: DaFoxPosted on 2003-11-12 at 08:58:01ID: 9732737

Hi,

>> Hook function RasDialA in RASAPI32.DLL but unsuccessful because if a program was packed, it doesn't effect.

Just hook LoadLibrary and/or GetProcAddress to get notified when a process loads RasDial API. Or patch the IAT of the *running* process.

Markus

 

by: saienlyhPosted on 2003-11-13 at 04:45:26ID: 9738984

function DisconnectActiveConnection: Boolean;

var

RasEntry: TRasEntry;

EntryInfoSize: Cardinal;

DeviceInfoSize: Cardinal;

RasGetEntryPropertiesResult: Integer;

begin

ZeroMemory(@RasEntry, SizeOf(TRasEntry));

RasEntry.dwSize := SizeOf(TRasEntry);

EntryInfoSize := SizeOf(TRasEntry);

RasGetEntryPropertiesResult := RasGetEntryProperties(nil,

MyActiveEntryName), @RasEntry, EntryInfoSize, nil, DeviceInfoSize);

if (RasGetEntryPropertiesResult = 0) then

Result := DisconnectDevice(StrPas(RasEntry.szDeviceName));

end;

　

 

by: LeVuHoangPosted on 2003-11-14 at 00:54:46ID: 9745995

thank you, but how to Hook LoadLibrary and disconnect BEFORE the connection finished

20120131-EE-VQP-002

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