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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
*/
package service
import (
"bufio"
"fmt"
"golang.org/x/sys/windows/svc"
"golang.zx2c4.com/winipcfg"
"golang.zx2c4.com/wireguard/device"
"golang.zx2c4.com/wireguard/ipc"
"golang.zx2c4.com/wireguard/tun"
"golang.zx2c4.com/wireguard/windows/conf"
"golang.zx2c4.com/wireguard/windows/ringlogger"
"log"
"net"
"runtime/debug"
"strings"
)
type tunnelService struct {
path string
}
func (service *tunnelService) Execute(args []string, r <-chan svc.ChangeRequest, changes chan<- svc.Status) (svcSpecificEC bool, exitCode uint32) {
changes <- svc.Status{State: svc.StartPending}
var dev *device.Device
var uapi net.Listener
var routeChangeCallback *winipcfg.RouteChangeCallback
var logger *device.Logger
var err error
serviceError := ErrorSuccess
defer func() {
svcSpecificEC, exitCode = determineErrorCode(err, serviceError)
logErr := combineErrors(err, serviceError)
if logErr != nil {
if logger != nil {
logger.Error.Print(logErr)
} else {
log.Print(logErr)
}
}
changes <- svc.Status{State: svc.StopPending}
if routeChangeCallback != nil {
routeChangeCallback.Unregister()
}
if uapi != nil {
uapi.Close()
}
if dev != nil {
dev.Close()
}
log.Print("Shutting down")
}()
err = ringlogger.InitGlobalLogger("TUN")
if err != nil {
serviceError = ErrorRingloggerOpen
return
}
defer func() {
if x := recover(); x != nil {
log.Printf("%v:\n%s", x, string(debug.Stack()))
panic(x)
}
}()
conf, err := conf.LoadFromPath(service.path)
if err != nil {
serviceError = ErrorLoadConfiguration
return
}
stdLog := log.New(ringlogger.Global, fmt.Sprintf("[%s] ", conf.Name), 0)
logger = &device.Logger{stdLog, stdLog, stdLog}
logger.Info.Println("Starting wireguard-go version", device.WireGuardGoVersion)
logger.Debug.Println("Debug log enabled")
wintun, err := tun.CreateTUN(conf.Name)
if err != nil {
serviceError = ErrorCreateWintun
return
}
realInterfaceName, err := wintun.Name()
if err != nil {
serviceError = ErrorDetermineWintunName
return
}
conf.Name = realInterfaceName
dev = device.NewDevice(wintun, logger)
dev.Up()
logger.Info.Println("Device started")
uapi, err = ipc.UAPIListen(conf.Name)
if err != nil {
serviceError = ErrorUAPIListen
return
}
go func() {
for {
conn, err := uapi.Accept()
if err != nil {
continue
}
go dev.IpcHandle(conn)
}
}()
logger.Info.Println("UAPI listener started")
uapiConf, err := conf.ToUAPI()
if err != nil {
serviceError = ErrorUAPISerialization
return
}
ipcErr := dev.IpcSetOperation(bufio.NewReader(strings.NewReader(uapiConf)))
if ipcErr != nil {
err = ipcErr
serviceError = ErrorDeviceSetConfig
return
}
nativeTun := wintun.(*tun.NativeTun)
routeChangeCallback, err = monitorDefaultRoutes(dev, conf.Interface.Mtu == 0, nativeTun)
if err != nil {
serviceError = ErrorBindSocketsToDefaultRoutes
return
}
err = configureInterface(conf, nativeTun)
if err != nil {
serviceError = ErrorSetNetConfig
return
}
changes <- svc.Status{State: svc.Running, Accepts: svc.AcceptStop}
for {
select {
case c := <-r:
switch c.Cmd {
case svc.Stop:
return
case svc.Interrogate:
changes <- c.CurrentStatus
default:
logger.Error.Printf("Unexpected service control request #%d\n", c)
}
case <-dev.Wait():
return
}
}
}
|
