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|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
*/
package service
import (
"bufio"
"fmt"
"golang.zx2c4.com/winipcfg"
"golang.zx2c4.com/wireguard/ipc"
"log"
"net"
"runtime/debug"
"strings"
"golang.org/x/sys/windows/svc"
"golang.org/x/sys/windows/svc/eventlog"
"golang.zx2c4.com/wireguard/device"
"golang.zx2c4.com/wireguard/tun"
"golang.zx2c4.com/wireguard/windows/conf"
)
type confElogger struct {
elog *eventlog.Log
conf *conf.Config
level int
}
func (elog confElogger) Write(p []byte) (n int, err error) {
msg := elog.conf.Name + ": " + string(p)
n = len(msg)
switch elog.level {
case 1, 2:
err = elog.elog.Info(1, msg)
case 3:
err = elog.elog.Error(1, msg)
}
return
}
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 elog *eventlog.Log
defer func() {
changes <- svc.Status{State: svc.StopPending}
if routeChangeCallback != nil {
routeChangeCallback.Unregister()
}
if uapi != nil {
uapi.Close()
}
if dev != nil {
dev.Close()
}
if elog != nil {
elog.Info(1, "Shutting down")
}
}()
//TODO: remember to clean this up in the msi uninstaller
eventlog.InstallAsEventCreate("WireGuard", eventlog.Info|eventlog.Warning|eventlog.Error)
elog, err := eventlog.Open("WireGuard")
if err != nil {
exitCode = ERROR_LOG_CONTAINER_OPEN_FAILED
return
}
log.SetOutput(elogger{elog})
defer func() {
if x := recover(); x != nil {
elog.Error(1, fmt.Sprintf("%v:\n%s", x, string(debug.Stack())))
panic(x)
}
}()
conf, err := conf.LoadFromPath(service.path)
if err != nil {
elog.Error(1, "Unable to load configuration file from path "+service.path+": "+err.Error())
exitCode = ERROR_OPEN_FAILED
return
}
logger := &device.Logger{
Debug: log.New(&confElogger{elog: elog, conf: conf, level: 1}, "", 0),
Info: log.New(&confElogger{elog: elog, conf: conf, level: 2}, "", 0),
Error: log.New(&confElogger{elog: elog, conf: conf, level: 3}, "", 0),
}
logger.Info.Println("Starting wireguard-go version", device.WireGuardGoVersion)
logger.Debug.Println("Debug log enabled")
wintun, err := tun.CreateTUN(conf.Name)
if err == nil {
realInterfaceName, err2 := wintun.Name()
if err2 == nil {
conf.Name = realInterfaceName
}
} else {
logger.Error.Println("Failed to create TUN device:", err)
exitCode = ERROR_ADAP_HDW_ERR
return
}
dev = device.NewDevice(wintun, logger)
dev.Up()
logger.Info.Println("Device started")
uapi, err = ipc.UAPIListen(conf.Name)
if err != nil {
logger.Error.Println("Failed to listen on uapi socket:", err)
exitCode = ERROR_PIPE_LISTENING
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 {
logger.Error.Println("Failed to convert to UAPI serialization:", err)
exitCode = ERROR_INVALID_PARAMETER
return
}
dev.IpcSetOperation(bufio.NewReader(strings.NewReader(uapiConf)))
guid := wintun.(*tun.NativeTun).GUID()
routeChangeCallback, err = monitorDefaultRoutes(dev, &guid)
if err != nil {
logger.Error.Println("Unable to bind sockets to default route:", err)
exitCode = ERROR_NETWORK_BUSY
return
}
err = configureInterface(conf, &guid)
if err != nil {
logger.Error.Println("Unable to set interface addresses, routes, DNS, or IP settings:", err)
exitCode = ERROR_NETWORK_BUSY
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", c)
}
case <-dev.Wait():
return
}
}
}
|
