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api: split adapter creation/deletion to delegator and worker functions

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Suggested-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2020-10-30 07:45:20 +01:00
parent 3dacd1c6ce
commit 5a3a217b0b
1 changed files with 92 additions and 75 deletions
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167
api/adapter.c
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@ -1492,6 +1492,58 @@ cleanupMutex:
return Result;
}
static WINTUN_STATUS
CreateAdapterNatively(
_In_z_count_c_(MAX_POOL) const WCHAR *Pool,
_In_z_count_c_(MAX_ADAPTER_NAME) const WCHAR *Name,
_In_opt_ const GUID *RequestedGUID,
_Out_ WINTUN_ADAPTER **Adapter,
_Inout_ BOOL *RebootRequired)
{
LOG(WINTUN_LOG_INFO, L"Spawning native process");
WCHAR RequestedGUIDStr[MAX_GUID_STRING_LEN];
WCHAR Arguments[15 + MAX_POOL + 3 + MAX_ADAPTER_NAME + 2 + MAX_GUID_STRING_LEN + 1];
if (_snwprintf_s(
Arguments,
_countof(Arguments),
_TRUNCATE,
RequestedGUID ? L"CreateAdapter \"%.*s\" \"%.*s\" %.*s" : L"CreateAdapter \"%.*s\" \"%.*s\"",
MAX_POOL,
Pool,
MAX_ADAPTER_NAME,
Name,
RequestedGUID ? StringFromGUID2(RequestedGUID, RequestedGUIDStr, _countof(RequestedGUIDStr)) : 0,
RequestedGUIDStr) == -1)
return LOG(WINTUN_LOG_ERR, L"Command line too long"), ERROR_INVALID_PARAMETER;
WCHAR Response[8 + 1 + MAX_GUID_STRING_LEN + 1 + 8 + 1];
DWORD Result = ExecuteRunDll32(Arguments, Response, _countof(Response));
if (Result != ERROR_SUCCESS)
{
LOG(WINTUN_LOG_ERR, L"Error executing worker process");
return Result;
}
int Argc;
WCHAR **Argv = CommandLineToArgvW(Response, &Argc);
GUID CfgInstanceID;
if (Argc < 3 || FAILED(CLSIDFromString(Argv[1], &CfgInstanceID)))
{
LOG(WINTUN_LOG_ERR, L"Incomplete or invalid response");
Result = ERROR_INVALID_PARAMETER;
goto cleanupArgv;
}
Result = wcstoul(Argv[0], NULL, 16);
if (Result == ERROR_SUCCESS && GetAdapter(Pool, &CfgInstanceID, Adapter) != ERROR_SUCCESS)
{
LOG(WINTUN_LOG_ERR, L"Failed to get adapter");
Result = ERROR_FILE_NOT_FOUND;
}
if (wcstoul(Argv[2], NULL, 16))
*RebootRequired = TRUE;
cleanupArgv:
LocalFree(Argv);
return Result;
}
#endif
WINTUN_STATUS WINAPI
@ -1504,50 +1556,7 @@ WintunCreateAdapter(
{
#if defined(_M_IX86) || defined(_M_ARM)
if (NativeMachine != IMAGE_FILE_PROCESS)
{
LOG(WINTUN_LOG_INFO, L"Spawning native process for the job");
WCHAR RequestedGUIDStr[MAX_GUID_STRING_LEN];
WCHAR Arguments[15 + MAX_POOL + 3 + MAX_ADAPTER_NAME + 2 + MAX_GUID_STRING_LEN + 1];
if (_snwprintf_s(
Arguments,
_countof(Arguments),
_TRUNCATE,
RequestedGUID ? L"CreateAdapter \"%.*s\" \"%.*s\" %.*s" : L"CreateAdapter \"%.*s\" \"%.*s\"",
MAX_POOL,
Pool,
MAX_ADAPTER_NAME,
Name,
RequestedGUID ? StringFromGUID2(RequestedGUID, RequestedGUIDStr, _countof(RequestedGUIDStr)) : 0,
RequestedGUIDStr) == -1)
return LOG(WINTUN_LOG_ERR, L"Command line too long"), ERROR_INVALID_PARAMETER;
WCHAR Response[8 + 1 + MAX_GUID_STRING_LEN + 1 + 8 + 1];
DWORD Result = ExecuteRunDll32(Arguments, Response, _countof(Response));
if (Result != ERROR_SUCCESS)
{
LOG(WINTUN_LOG_ERR, L"Error executing worker process");
return Result;
}
int Argc;
WCHAR **Argv = CommandLineToArgvW(Response, &Argc);
GUID CfgInstanceID;
if (Argc < 3 || FAILED(CLSIDFromString(Argv[1], &CfgInstanceID)))
{
LOG(WINTUN_LOG_ERR, L"Incomplete or invalid response");
Result = ERROR_INVALID_PARAMETER;
goto cleanupArgv;
}
Result = wcstoul(Argv[0], NULL, 16);
if (Result == ERROR_SUCCESS && GetAdapter(Pool, &CfgInstanceID, Adapter) != ERROR_SUCCESS)
{
LOG(WINTUN_LOG_ERR, L"Failed to get adapter");
Result = ERROR_FILE_NOT_FOUND;
}
if (wcstoul(Argv[2], NULL, 16))
*RebootRequired = TRUE;
cleanupArgv:
LocalFree(Argv);
return Result;
}
return CreateAdapterNatively(Pool, Name, RequestedGUID, Adapter, RebootRequired);
#endif
#if defined(HAVE_EV) || defined(HAVE_WHQL)
@ -1601,42 +1610,50 @@ cleanupDirectory:
#endif
}
#if defined(_M_IX86) || defined(_M_ARM)
static WINTUN_STATUS
DeleteAdapterNatively(_In_ const WINTUN_ADAPTER *Adapter, _Inout_ BOOL *RebootRequired)
{
LOG(WINTUN_LOG_INFO, L"Spawning native process");
WCHAR GuidStr[MAX_GUID_STRING_LEN];
WCHAR Arguments[14 + MAX_GUID_STRING_LEN + 1];
if (_snwprintf_s(
Arguments,
_countof(Arguments),
_TRUNCATE,
L"DeleteAdapter %.*s",
StringFromGUID2(&Adapter->CfgInstanceID, GuidStr, _countof(GuidStr)),
GuidStr) == -1)
return LOG(WINTUN_LOG_ERR, L"Command line too long"), ERROR_INVALID_PARAMETER;
WCHAR Response[8 + 1 + 8 + 1];
DWORD Result = ExecuteRunDll32(Arguments, Response, _countof(Response));
if (Result != ERROR_SUCCESS)
LOG(WINTUN_LOG_ERR, L"Error executing worker process");
int Argc;
WCHAR **Argv = CommandLineToArgvW(Response, &Argc);
if (Argc < 2)
{
LOG(WINTUN_LOG_ERR, L"Incomplete or invalid response");
Result = ERROR_INVALID_PARAMETER;
goto cleanupArgv;
}
Result = wcstoul(Argv[0], NULL, 16);
if (wcstoul(Argv[1], NULL, 16))
*RebootRequired = TRUE;
cleanupArgv:
LocalFree(Argv);
return Result;
}
#endif
WINTUN_STATUS WINAPI
WintunDeleteAdapter(_In_ const WINTUN_ADAPTER *Adapter, _Inout_ BOOL *RebootRequired)
{
#if defined(_M_IX86) || defined(_M_ARM)
if (NativeMachine != IMAGE_FILE_PROCESS)
{
LOG(WINTUN_LOG_INFO, L"Spawning native process for the job");
WCHAR GuidStr[MAX_GUID_STRING_LEN];
WCHAR Arguments[14 + MAX_GUID_STRING_LEN + 1];
if (_snwprintf_s(
Arguments,
_countof(Arguments),
_TRUNCATE,
L"DeleteAdapter %.*s",
StringFromGUID2(&Adapter->CfgInstanceID, GuidStr, _countof(GuidStr)),
GuidStr) == -1)
return LOG(WINTUN_LOG_ERR, L"Command line too long"), ERROR_INVALID_PARAMETER;
WCHAR Response[8 + 1 + 8 + 1];
DWORD Result = ExecuteRunDll32(Arguments, Response, _countof(Response));
if (Result != ERROR_SUCCESS)
LOG(WINTUN_LOG_ERR, L"Error executing worker process");
int Argc;
WCHAR **Argv = CommandLineToArgvW(Response, &Argc);
if (Argc < 2)
{
LOG(WINTUN_LOG_ERR, L"Incomplete or invalid response");
Result = ERROR_INVALID_PARAMETER;
goto cleanupArgv;
}
Result = wcstoul(Argv[0], NULL, 16);
if (wcstoul(Argv[1], NULL, 16))
*RebootRequired = TRUE;
cleanupArgv:
LocalFree(Argv);
return Result;
}
return DeleteAdapterNatively(Adapter, RebootRequired);
#endif
HDEVINFO DevInfo;