1 files changed, 38 insertions, 0 deletions
diff --git a/api/logger.h b/api/logger.h
new file mode 100644
index 0000000..15b6bbb
--- /dev/null
+++ b/api/logger.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
+ */
+
+#pragma once
+
+#include <Windows.h>
+
+typedef enum _WINTUN_LOGGER_LEVEL
+{
+    WINTUN_LOG_INFO = 0,
+    WINTUN_LOG_WARN,
+    WINTUN_LOG_ERR
+} WINTUN_LOGGER_LEVEL;
+
+typedef VOID(CALLBACK *WINTUN_LOGGER_FUNC)(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *Message);
+
+extern WINTUN_LOGGER_FUNC Logger;
+
+VOID WINAPI
+WintunSetLogger(_In_ WINTUN_LOGGER_FUNC NewLogger);
+
+_Post_equals_last_error_ DWORD
+LoggerError(_In_z_ const WCHAR *Prefix, _In_ DWORD Error);
+
+inline _Post_equals_last_error_ DWORD
+LoggerLastError(_In_z_ const WCHAR *Prefix)
+{
+    DWORD Error = GetLastError();
+    LoggerError(Prefix, Error);
+    SetLastError(Error);
+    return Error;
+}
+
+#define WINTUN_LOGGER(lvl, msg) Logger((lvl), _L(__FUNCTION__) L": " msg)
+#define WINTUN_LOGGER_ERROR(msg, err) LoggerError(_L(__FUNCTION__) L": " msg, (err))
+#define WINTUN_LOGGER_LAST_ERROR(msg) LoggerLastError(_L(__FUNCTION__) L": " msg)