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|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019-2020 WireGuard LLC. All Rights Reserved.
*/
package manager
import (
"encoding/gob"
"errors"
"os"
"sync"
"golang.zx2c4.com/wireguard/windows/conf"
"golang.zx2c4.com/wireguard/windows/updater"
)
type Tunnel struct {
Name string
}
type TunnelState int
const (
TunnelUnknown TunnelState = iota
TunnelStarted
TunnelStopped
TunnelStarting
TunnelStopping
)
type NotificationType int
const (
TunnelChangeNotificationType NotificationType = iota
TunnelsChangeNotificationType
ManagerStoppingNotificationType
UpdateFoundNotificationType
UpdateProgressNotificationType
)
type MethodType int
const (
StoredConfigMethodType MethodType = iota
RuntimeConfigMethodType
StartMethodType
StopMethodType
WaitForStopMethodType
DeleteMethodType
StateMethodType
GlobalStateMethodType
CreateMethodType
TunnelsMethodType
QuitMethodType
UpdateStateMethodType
UpdateMethodType
)
var (
rpcEncoder *gob.Encoder
rpcDecoder *gob.Decoder
rpcMutex sync.Mutex
)
type TunnelChangeCallback struct {
cb func(tunnel *Tunnel, state TunnelState, globalState TunnelState, err error)
}
var tunnelChangeCallbacks = make(map[*TunnelChangeCallback]bool)
type TunnelsChangeCallback struct {
cb func()
}
var tunnelsChangeCallbacks = make(map[*TunnelsChangeCallback]bool)
type ManagerStoppingCallback struct {
cb func()
}
var managerStoppingCallbacks = make(map[*ManagerStoppingCallback]bool)
type UpdateFoundCallback struct {
cb func(updateState UpdateState)
}
var updateFoundCallbacks = make(map[*UpdateFoundCallback]bool)
type UpdateProgressCallback struct {
cb func(dp updater.DownloadProgress)
}
var updateProgressCallbacks = make(map[*UpdateProgressCallback]bool)
func InitializeIPCClient(reader *os.File, writer *os.File, events *os.File) {
rpcDecoder = gob.NewDecoder(reader)
rpcEncoder = gob.NewEncoder(writer)
go func() {
decoder := gob.NewDecoder(events)
for {
var notificationType NotificationType
err := decoder.Decode(¬ificationType)
if err != nil {
return
}
switch notificationType {
case TunnelChangeNotificationType:
var tunnel string
err := decoder.Decode(&tunnel)
if err != nil || len(tunnel) == 0 {
continue
}
var state TunnelState
err = decoder.Decode(&state)
if err != nil {
continue
}
var globalState TunnelState
err = decoder.Decode(&globalState)
if err != nil {
continue
}
var errStr string
err = decoder.Decode(&errStr)
if err != nil {
continue
}
var retErr error
if len(errStr) > 0 {
retErr = errors.New(errStr)
}
if state == TunnelUnknown {
continue
}
t := &Tunnel{tunnel}
for cb := range tunnelChangeCallbacks {
cb.cb(t, state, globalState, retErr)
}
case TunnelsChangeNotificationType:
for cb := range tunnelsChangeCallbacks {
cb.cb()
}
case ManagerStoppingNotificationType:
for cb := range managerStoppingCallbacks {
cb.cb()
}
case UpdateFoundNotificationType:
var state UpdateState
err = decoder.Decode(&state)
if err != nil {
continue
}
for cb := range updateFoundCallbacks {
cb.cb(state)
}
case UpdateProgressNotificationType:
var dp updater.DownloadProgress
err = decoder.Decode(&dp.Activity)
if err != nil {
continue
}
err = decoder.Decode(&dp.BytesDownloaded)
if err != nil {
continue
}
err = decoder.Decode(&dp.BytesTotal)
if err != nil {
continue
}
var errStr string
err = decoder.Decode(&errStr)
if err != nil {
continue
}
if len(errStr) > 0 {
dp.Error = errors.New(errStr)
}
err = decoder.Decode(&dp.Complete)
if err != nil {
continue
}
for cb := range updateProgressCallbacks {
cb.cb(dp)
}
}
}
}()
}
func rpcDecodeError() error {
var str string
err := rpcDecoder.Decode(&str)
if err != nil {
return err
}
if len(str) == 0 {
return nil
}
return errors.New(str)
}
func (t *Tunnel) StoredConfig() (c conf.Config, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(StoredConfigMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecoder.Decode(&c)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) RuntimeConfig() (c conf.Config, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(RuntimeConfigMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecoder.Decode(&c)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) Start() (err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(StartMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) Stop() (err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(StopMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) Toggle() (oldState TunnelState, err error) {
oldState, err = t.State()
if err != nil {
oldState = TunnelUnknown
return
}
if oldState == TunnelStarted {
err = t.Stop()
} else if oldState == TunnelStopped {
err = t.Start()
}
return
}
func (t *Tunnel) WaitForStop() (err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(WaitForStopMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) Delete() (err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(DeleteMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func (t *Tunnel) State() (tunnelState TunnelState, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(StateMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(t.Name)
if err != nil {
return
}
err = rpcDecoder.Decode(&tunnelState)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func IPCClientGlobalState() (tunnelState TunnelState, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(GlobalStateMethodType)
if err != nil {
return
}
err = rpcDecoder.Decode(&tunnelState)
if err != nil {
return
}
return
}
func IPCClientNewTunnel(conf *conf.Config) (tunnel Tunnel, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(CreateMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(*conf)
if err != nil {
return
}
err = rpcDecoder.Decode(&tunnel)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func IPCClientTunnels() (tunnels []Tunnel, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(TunnelsMethodType)
if err != nil {
return
}
err = rpcDecoder.Decode(&tunnels)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func IPCClientQuit(stopTunnelsOnQuit bool) (alreadyQuit bool, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(QuitMethodType)
if err != nil {
return
}
err = rpcEncoder.Encode(stopTunnelsOnQuit)
if err != nil {
return
}
err = rpcDecoder.Decode(&alreadyQuit)
if err != nil {
return
}
err = rpcDecodeError()
return
}
func IPCClientUpdateState() (updateState UpdateState, err error) {
rpcMutex.Lock()
defer rpcMutex.Unlock()
err = rpcEncoder.Encode(UpdateStateMethodType)
if err != nil {
return
}
err = rpcDecoder.Decode(&updateState)
if err != nil {
return
}
return
}
func IPCClientUpdate() error {
rpcMutex.Lock()
defer rpcMutex.Unlock()
return rpcEncoder.Encode(UpdateMethodType)
}
func IPCClientRegisterTunnelChange(cb func(tunnel *Tunnel, state TunnelState, globalState TunnelState, err error)) *TunnelChangeCallback {
s := &TunnelChangeCallback{cb}
tunnelChangeCallbacks[s] = true
return s
}
func (cb *TunnelChangeCallback) Unregister() {
delete(tunnelChangeCallbacks, cb)
}
func IPCClientRegisterTunnelsChange(cb func()) *TunnelsChangeCallback {
s := &TunnelsChangeCallback{cb}
tunnelsChangeCallbacks[s] = true
return s
}
func (cb *TunnelsChangeCallback) Unregister() {
delete(tunnelsChangeCallbacks, cb)
}
func IPCClientRegisterManagerStopping(cb func()) *ManagerStoppingCallback {
s := &ManagerStoppingCallback{cb}
managerStoppingCallbacks[s] = true
return s
}
func (cb *ManagerStoppingCallback) Unregister() {
delete(managerStoppingCallbacks, cb)
}
func IPCClientRegisterUpdateFound(cb func(updateState UpdateState)) *UpdateFoundCallback {
s := &UpdateFoundCallback{cb}
updateFoundCallbacks[s] = true
return s
}
func (cb *UpdateFoundCallback) Unregister() {
delete(updateFoundCallbacks, cb)
}
func IPCClientRegisterUpdateProgress(cb func(dp updater.DownloadProgress)) *UpdateProgressCallback {
s := &UpdateProgressCallback{cb}
updateProgressCallbacks[s] = true
return s
}
func (cb *UpdateProgressCallback) Unregister() {
delete(updateProgressCallbacks, cb)
}
|