driver: automatically close long-lived handle

There's only one handle that's likely to be open in a long lived way:
the tun registration handle. So we can force that closed automatically
when the device is about to close, if it's been improperly left open.
Other handles will indeed hold up closing, but if those exist, they're a
sign of a larger bug elsewhere that should be addressed. On the other
hand, tun registration handles might legitimately be open during driver
upgrades. This also saves us the trouble of dereferencing a freed
FileObject as in the general case.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 0 insertions, 15 deletions

diff --git a/api/adapter.h b/api/adapter.h
index ec84d70..567ee82 100644
--- a/api/adapter.h
+++ b/api/adapter.h
@@ -135,18 +135,3 @@ AdapterEnableInstance(_In_ HDEVINFO DevInfo, _In_ SP_DEVINFO_DATA *DevInfoData);
 _Return_type_success_(return != FALSE)
 BOOL
 AdapterDisableInstance(_In_ HDEVINFO DevInfo, _In_ SP_DEVINFO_DATA *DevInfoData);
-
-/**
- * Force closes all device handles of the specified device instance.
- *
- * @param DevInfo      Device info handle from SetupAPI.
- * @param DevInfoData  Device info data specifying which device.
- *
- * @return If the function succeeds, the return value is TRUE. If the
- *         function fails, the return value is FALSE. To get extended
- *         error information, call GetLastError.
- */
-
-_Return_type_success_(return != FALSE)
-BOOL
-AdapterForceCloseHandles(_In_ HDEVINFO DevInfo, _In_ SP_DEVINFO_DATA *DevInfoData);