static BOOLEAN
SupportChildDrivers(
VOID
)
{
BOOLEAN Success;
HKEY XenbusKey;
HRESULT Error;
DWORD SubKeys;
DWORD MaxSubKeyLength;
DWORD SubKeyLength;
PTCHAR SubKeyName;
HKEY DeviceKey;
PTCHAR DriverKeyName;
HKEY DriverKey;
PTCHAR MatchingDeviceID;
DWORD Index;
Log("====>");
Success = OpenBusKey("XENHID", &XenbusKey);
if (!Success) {
// If there is no key then this must be a fresh installation
if (GetLastError() == ERROR_FILE_NOT_FOUND)
goto done;
goto fail1;
}
Error = RegQueryInfoKey(XenbusKey,
NULL,
NULL,
NULL,
&SubKeys,
&MaxSubKeyLength,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL);
if (Error != ERROR_SUCCESS) {
SetLastError(Error);
goto fail2;
}
SubKeyLength = MaxSubKeyLength + sizeof (TCHAR);
SubKeyName = malloc(SubKeyLength);
if (SubKeyName == NULL)
goto fail3;
for (Index = 0; Index < SubKeys; Index++) {
SubKeyLength = MaxSubKeyLength + sizeof (TCHAR);
memset(SubKeyName, 0, SubKeyLength);
Error = RegEnumKeyEx(XenbusKey,
Index,
(LPTSTR)SubKeyName,
&SubKeyLength,
NULL,
NULL,
NULL,
NULL);
if (Error != ERROR_SUCCESS) {
SetLastError(Error);
goto fail4;
}
Success = OpenDeviceKey("XENHID", SubKeyName, &DeviceKey);
if (!Success)
goto fail5;
Success = GetDriverKeyName(DeviceKey, &DriverKeyName);
if (!Success)
goto fail6;
if (DriverKeyName == NULL)
goto loop;
Success = OpenDriverKey(DriverKeyName, &DriverKey);
if (!Success)
goto loop;
Success = GetMatchingDeviceID(DriverKey, &MatchingDeviceID);
if (!Success)
goto fail7;
Success = SupportDeviceID(MatchingDeviceID);
if (!Success)
goto fail8;
free(MatchingDeviceID);
RegCloseKey(DriverKey);
loop:
if (DriverKeyName != NULL)
free(DriverKeyName);
RegCloseKey(DeviceKey);
}
free(SubKeyName);
RegCloseKey(XenbusKey);
done:
Log("<====");
return TRUE;
fail8:
Log("fail8");
free(MatchingDeviceID);
fail7:
Log("fail7");
RegCloseKey(DriverKey);
free(DriverKeyName);
fail6:
Log("fail6");
RegCloseKey(DeviceKey);
fail5:
Log("fail5");
fail4:
Log("fail4");
free(SubKeyName);
fail3:
Log("fail3");
fail2:
Log("fail2");
RegCloseKey(XenbusKey);
fail1:
Error = GetLastError();
{
PTCHAR Message;
Message = GetErrorMessage(Error);
Log("fail1 (%s)", Message);
LocalFree(Message);
}
return FALSE;
}
static BOOLEAN
AllowInstall(
VOID
)
{
BOOLEAN Success;
PTCHAR DeviceKeyName = NULL;
HKEY DeviceKey = NULL;
PTCHAR DriverKeyName = NULL;
HKEY DriverKey = NULL;
HRESULT Error;
DWORD MaxValueLength;
DWORD DriverDescLength;
PTCHAR DriverDesc = NULL;
DWORD Type;
// Look for a legacy platform device
Success = GetDeviceKeyName(PLATFORM_DEVICE_0001_NAME,
&DeviceKeyName);
if (!Success)
goto fail1;
if (DeviceKeyName != NULL)
goto found;
Success = GetDeviceKeyName(PLATFORM_DEVICE_0002_NAME,
&DeviceKeyName);
if (!Success)
goto fail2;
if (DeviceKeyName != NULL)
goto found;
// No legacy platform device
goto done;
found:
Success = OpenDeviceKey(DeviceKeyName, &DeviceKey);
if (!Success)
goto fail3;
// Check for a bound driver
Success = GetDriverKeyName(DeviceKey, &DriverKeyName);
if (!Success)
goto fail4;
if (DriverKeyName == NULL)
goto done;
Success = OpenDriverKey(DriverKeyName, &DriverKey);
if (!Success)
goto fail5;
Error = RegQueryInfoKey(DriverKey,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
&MaxValueLength,
NULL,
NULL);
if (Error != ERROR_SUCCESS) {
SetLastError(Error);
goto fail6;
}
DriverDescLength = MaxValueLength + sizeof (TCHAR);
DriverDesc = malloc(DriverDescLength);
if (DriverDesc == NULL)
goto fail7;
memset(DriverDesc, 0, DriverDescLength);
Error = RegQueryValueEx(DriverKey,
"DriverDesc",
NULL,
&Type,
(LPBYTE)DriverDesc,
&DriverDescLength);
if (Error != ERROR_SUCCESS) {
if (Error == ERROR_FILE_NOT_FOUND)
goto done;
SetLastError(Error);
goto fail8;
}
if (Type != REG_SZ) {
SetLastError(ERROR_BAD_FORMAT);
goto fail9;
}
if (strcmp(DriverDesc, "Xen Platform") != 0) {
SetLastError(ERROR_INSTALL_FAILURE);
goto fail10;
}
done:
if (DriverDesc != NULL) {
free(DriverDesc);
RegCloseKey(DriverKey);
}
if (DriverKeyName != NULL) {
free(DriverKeyName);
RegCloseKey(DeviceKey);
}
if (DeviceKeyName != NULL)
free(DeviceKeyName);
return TRUE;
fail10:
Log("fail10");
fail9:
Log("fail9");
fail8:
Log("fail8");
free(DriverDesc);
fail7:
Log("fail7");
fail6:
Log("fail6");
RegCloseKey(DriverKey);
fail5:
Log("fail5");
free(DriverKeyName);
fail4:
Log("fail4");
RegCloseKey(DeviceKey);
fail3:
Log("fail3");
free(DeviceKeyName);
fail2:
Log("fail2");
fail1:
Error = GetLastError();
{
PTCHAR Message;
Message = GetErrorMessage(Error);
Log("fail1 (%s)", Message);
LocalFree(Message);
}
return FALSE;
}
