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api: use custom devpkey for pool

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It seems like the friendly name is still getting reset sometimes. Rather
than swimming upstream, it turns out we can just use a custom devpkey
that, according to msdn, is respected.

https://docs.microsoft.com/en-us/windows-hardware/drivers/install/creating-custom-device-properties

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-01-30 16:39:33 +01:00
parent 7710ff187b
commit 49b7692d5b
1 changed files with 28 additions and 2 deletions
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30
api/adapter.c
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@ -44,6 +44,11 @@
# error Unsupported architecture
#endif
static const DEVPROPKEY DEVPKEY_Wintun_Pool = {
{ 0xaba51201, 0xdf7a, 0x3a38, { 0x0a, 0xd9, 0x90, 0x64, 0x42, 0xd2, 0x71, 0xae } },
DEVPROPID_FIRST_USABLE + 0
};
typedef struct _SP_DEVINFO_DATA_LIST
{
SP_DEVINFO_DATA Data;
@ -470,10 +475,18 @@ static _Return_type_success_(return != FALSE) BOOL
static BOOL
IsPoolMember(_In_z_ const WCHAR *Pool, _In_ HDEVINFO DevInfo, _In_ SP_DEVINFO_DATA *DevInfoData)
{
WCHAR *DeviceDesc = GetDeviceRegistryString(DevInfo, DevInfoData, SPDRP_DEVICEDESC);
WCHAR *FriendlyName = GetDeviceRegistryString(DevInfo, DevInfoData, SPDRP_FRIENDLYNAME);
WCHAR PoolProp[MAX_POOL_DEVICE_TYPE];
DEVPROPTYPE PropType;
if (SetupDiGetDevicePropertyW(
DevInfo, DevInfoData, &DEVPKEY_Wintun_Pool, &PropType, (PBYTE)PoolProp, sizeof(PoolProp), NULL, 0) &&
PropType == DEVPROP_TYPE_STRING)
return !_wcsicmp(PoolProp, Pool);
LOG_LAST_ERROR(L"Reading pool devpkey failed, falling back");
DWORD LastError = ERROR_SUCCESS;
BOOL Ret = FALSE;
WCHAR *DeviceDesc = GetDeviceRegistryString(DevInfo, DevInfoData, SPDRP_DEVICEDESC);
WCHAR *FriendlyName = GetDeviceRegistryString(DevInfo, DevInfoData, SPDRP_FRIENDLYNAME);
WCHAR PoolDeviceTypeName[MAX_POOL_DEVICE_TYPE];
if (!GetPoolDeviceTypeName(Pool, PoolDeviceTypeName))
{
@ -1436,6 +1449,19 @@ static _Return_type_success_(return != NULL) WINTUN_ADAPTER *CreateAdapter(
}
*RebootRequired = *RebootRequired || CheckReboot(DevInfo, &DevInfoData);
if (!SetupDiSetDevicePropertyW(
DevInfo,
&DevInfoData,
&DEVPKEY_Wintun_Pool,
DEVPROP_TYPE_STRING,
#pragma warning(suppress : 4090)
(const BYTE *)Pool,
(DWORD)((wcslen(Pool) + 1) * sizeof(WCHAR)),
0))
{
LastError = LOG_LAST_ERROR(L"Failed to set adapter pool");
goto cleanupNetDevRegKey;
}
if (!SetupDiSetDeviceRegistryPropertyW(
DevInfo,
&DevInfoData,