116 lines
2.3 KiB
C
116 lines
2.3 KiB
C
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#pragma warning(disable:4201) // nameless struct/union
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#define COBJMACROS
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#include <windows.h>
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#include <objbase.h>
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#include <hnetcfg.h>
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DWORD
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APIENTRY
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RasQuerySharedPrivateLan(
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OUT GUID* LanGuid )
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/*++
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Routine Description:
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This routine is invoked to determine the private-lan which
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is allowed access to the shared-network, if any.
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Arguments:
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LanGuid - receives the GUID for the private lan
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Return Value:
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DWORD - Win32 status code.
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--*/
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{
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HRESULT hr;
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BOOLEAN fComInitialized = TRUE;
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IHNetIcsSettings *pIcsSettings;
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IEnumHNetIcsPrivateConnections *pEnum;
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IHNetIcsPrivateConnection *pPrivateConn;
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IHNetConnection *pConn;
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ULONG ulCount;
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GUID *pGuid;
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if (NULL == LanGuid) {
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return ERROR_BAD_ARGUMENTS;
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}
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hr = CoInitializeEx(0, COINIT_MULTITHREADED | COINIT_DISABLE_OLE1DDE);
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if (FAILED(hr)) {
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fComInitialized = FALSE;
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if (RPC_E_CHANGED_MODE == hr) {
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hr = S_OK;
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}
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}
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if (FAILED(hr)) {
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goto Done;
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}
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hr = CoCreateInstance(
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&CLSID_HNetCfgMgr,
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NULL,
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CLSCTX_ALL,
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&IID_IHNetIcsSettings,
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(void**)&pIcsSettings
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);
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if (FAILED(hr)) {
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goto Done;
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}
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hr = IHNetIcsSettings_EnumIcsPrivateConnections(pIcsSettings, &pEnum);
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IHNetIcsSettings_Release(pIcsSettings);
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if (FAILED(hr)) {
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goto Done;
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}
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hr = IEnumHNetIcsPrivateConnections_Next(pEnum, 1, &pPrivateConn, &ulCount);
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IEnumHNetIcsPrivateConnections_Release(pEnum);
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if (FAILED(hr)) {
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goto Done;
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}
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if (1 == ulCount) {
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hr = IHNetIcsPrivateConnection_QueryInterface(
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pPrivateConn,
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&IID_IHNetConnection,
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(void**)&pConn
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);
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IHNetIcsPrivateConnection_Release(pPrivateConn);
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if (FAILED(hr)) {
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goto Done;
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}
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} else {
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hr = E_FAIL;
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goto Done;
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}
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hr = IHNetConnection_GetGuid(pConn, &pGuid);
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IHNetConnection_Release(pConn);
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if (SUCCEEDED(hr)) {
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CopyMemory(LanGuid, pGuid, sizeof(*pGuid));
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CoTaskMemFree(pGuid);
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}
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Done:
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if (TRUE == fComInitialized) {
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CoUninitialize();
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}
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return SUCCEEDED(hr) ? ERROR_SUCCESS : HRESULT_CODE(hr);
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}
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