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/* SPDX-License-Identifier: Apache-2.0
*
* Copyright (C) 2017-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* Copyright (C) 2025 Mullvad VPN AB. All Rights Reserved.
*/
package logging
// #include <stdlib.h>
// #include <stdint.h>
// #include <sys/types.h>
// #ifndef WIN32
// #define __stdcall
// #endif
// typedef void (__stdcall *LogSink)(unsigned int, const char *, uint64_t);
// static void callLogSink(void *logSink, int level, const char *message, uint64_t context)
// {
// ((LogSink)logSink)((unsigned int)level, message, context);
// }
import "C"
import (
"log"
"unsafe"
"golang.zx2c4.com/wireguard/device"
)
// Define type aliases.
type LogSink = unsafe.Pointer
type LogContext = C.uint64_t
type Logger struct {
sink LogSink
context LogContext
level C.int
}
func (l *Logger) Write(message []byte) (int, error) {
msg := C.CString(string(message))
C.callLogSink(l.sink, l.level, msg, l.context)
C.free(unsafe.Pointer(msg))
return len(message), nil
}
func NewLogger(logSink LogSink, logContext LogContext) *device.Logger {
logger := new(device.Logger)
logger.Verbosef = log.New(
&Logger{sink: logSink, context: logContext, level: device.LogLevelVerbose},
"",
0,
).Printf
logger.Errorf = log.New(
&Logger{sink: logSink, context: logContext, level: device.LogLevelError},
"",
0,
).Printf
return logger
}
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