wintun/api/logger.c
Simon Rozman c049a8f853 api: make logger callback return a dummy value
Go supports only callbacks that return "something" of a size up to
uintptr. It panics on void-returning callbacks.

Signed-off-by: Simon Rozman <simon@rozman.si>
2020-10-30 16:51:01 +01:00

51 lines
1.4 KiB
C

/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
*/
#include "pch.h"
static BOOL CALLBACK
NopLogger(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *LogLine)
{
UNREFERENCED_PARAMETER(Level);
UNREFERENCED_PARAMETER(LogLine);
return TRUE;
}
WINTUN_LOGGER_FUNC Logger = NopLogger;
VOID CALLBACK
WintunSetLogger(_In_ WINTUN_LOGGER_FUNC NewLogger)
{
Logger = NewLogger;
}
_Post_equals_last_error_ DWORD
LoggerError(_In_z_ const WCHAR *Prefix, _In_ DWORD Error)
{
WCHAR *SystemMessage = NULL, *FormattedMessage = NULL;
FormatMessageW(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_MAX_WIDTH_MASK,
NULL,
HRESULT_FROM_SETUPAPI(Error),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(VOID *)&SystemMessage,
0,
NULL);
FormatMessageW(
FORMAT_MESSAGE_FROM_STRING | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_ARGUMENT_ARRAY |
FORMAT_MESSAGE_MAX_WIDTH_MASK,
SystemMessage ? L"%1: %3(Code 0x%2!08X!)" : L"%1: Code 0x%2!08X!",
0,
0,
(VOID *)&FormattedMessage,
0,
(va_list *)(DWORD_PTR[]){ (DWORD_PTR)Prefix, (DWORD_PTR)Error, (DWORD_PTR)SystemMessage });
if (FormattedMessage)
Logger(WINTUN_LOG_ERR, FormattedMessage);
LocalFree(FormattedMessage);
LocalFree(SystemMessage);
return Error;
}