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//go:build (darwin || linux) && !android
// +build darwin linux
// +build !android
/* 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 main
// #include <stdlib.h>
// #include <stdint.h>
import "C"
import (
"bufio"
"os"
"strings"
"unsafe"
"golang.zx2c4.com/wireguard/conn"
"golang.zx2c4.com/wireguard/device"
"golang.zx2c4.com/wireguard/tun"
"github.com/mullvad/mullvadvpn-app/wireguard/libwg/logging"
"github.com/mullvad/mullvadvpn-app/wireguard/libwg/tunnelcontainer"
)
// Redefined here because otherwise the compiler doesn't realize it's a type alias for a type that's safe to export.
// Taken from the contained logging package.
type LogSink = unsafe.Pointer
type LogContext = C.uint64_t
//export wgTurnOn
func wgTurnOn(mtu int, cSettings *C.char, fd int, logSink LogSink, logContext LogContext) C.int32_t {
logger := logging.NewLogger(logSink, logging.LogContext(logContext))
if cSettings == nil {
logger.Errorf("cSettings is null\n")
return ERROR_INVALID_ARGUMENT
}
settings := goStringFixed(cSettings)
file := os.NewFile(uintptr(fd), "")
tunDevice, err := tun.CreateTUNFromFile(file, mtu)
if err != nil {
logger.Errorf("%s\n", err)
if err.Error() == "bad file descriptor" {
return ERROR_INTERMITTENT_FAILURE
}
return ERROR_GENERAL_FAILURE
}
device := device.NewDevice(tunDevice, conn.NewDefaultBind(), logger)
setErr := device.IpcSetOperation(bufio.NewReader(strings.NewReader(settings)))
if setErr != nil {
logger.Errorf("%s\n", setErr)
device.Close()
return ERROR_INTERMITTENT_FAILURE
}
device.Up()
context := tunnelcontainer.Context{
Device: device,
Logger: logger,
}
handle, err := tunnels.Insert(context)
if err != nil {
logger.Errorf("%s\n", err)
device.Close()
return ERROR_GENERAL_FAILURE
}
return C.int32_t(handle)
}
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