1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
package manager
import (
"fmt"
"log"
"runtime"
"sync"
"syscall"
"time"
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/svc"
"golang.org/x/sys/windows/svc/mgr"
"golang.zx2c4.com/wireguard/windows/conf"
"golang.zx2c4.com/wireguard/windows/services"
)
func trackExistingTunnels() error {
m, err := serviceManager()
if err != nil {
return err
}
names, err := conf.ListConfigNames()
if err != nil {
return err
}
for _, name := range names {
serviceName, err := ServiceNameOfTunnel(name)
if err != nil {
continue
}
service, err := m.OpenService(serviceName)
if err != nil {
continue
}
go trackTunnelService(name, service)
}
return nil
}
var serviceTrackerCallbackPtr = windows.NewCallback(func(notifier *windows.SERVICE_NOTIFY) uintptr {
return 0
})
var trackedTunnels = make(map[string]TunnelState)
var trackedTunnelsLock = sync.Mutex{}
func svcStateToTunState(s svc.State) TunnelState {
switch s {
case svc.StartPending:
return TunnelStarting
case svc.Running:
return TunnelStarted
case svc.StopPending:
return TunnelStopping
case svc.Stopped:
return TunnelStopped
default:
return TunnelUnknown
}
}
func trackedTunnelsGlobalState() (state TunnelState) {
state = TunnelStopped
trackedTunnelsLock.Lock()
defer trackedTunnelsLock.Unlock()
for _, s := range trackedTunnels {
if s == TunnelStarting {
return TunnelStarting
} else if s == TunnelStopping {
return TunnelStopping
} else if s == TunnelStarted || s == TunnelUnknown {
state = TunnelStarted
}
}
return
}
func trackTunnelService(tunnelName string, service *mgr.Service) {
defer func() {
service.Close()
log.Printf("[%s] Tunnel service tracker finished", tunnelName)
}()
trackedTunnelsLock.Lock()
if _, found := trackedTunnels[tunnelName]; found {
trackedTunnelsLock.Unlock()
return
}
trackedTunnels[tunnelName] = TunnelUnknown
trackedTunnelsLock.Unlock()
defer func() {
trackedTunnelsLock.Lock()
delete(trackedTunnels, tunnelName)
trackedTunnelsLock.Unlock()
}()
const serviceNotifications = windows.SERVICE_NOTIFY_RUNNING | windows.SERVICE_NOTIFY_START_PENDING | windows.SERVICE_NOTIFY_STOP_PENDING | windows.SERVICE_NOTIFY_STOPPED | windows.SERVICE_NOTIFY_DELETE_PENDING
notifier := &windows.SERVICE_NOTIFY{
Version: windows.SERVICE_NOTIFY_STATUS_CHANGE,
NotifyCallback: serviceTrackerCallbackPtr,
}
checkForDisabled := func() (shouldReturn bool) {
config, err := service.Config()
if err == windows.ERROR_SERVICE_MARKED_FOR_DELETE || config.StartType == windows.SERVICE_DISABLED {
log.Printf("[%s] Found disabled service via timeout, so deleting", tunnelName)
service.Delete()
trackedTunnelsLock.Lock()
trackedTunnels[tunnelName] = TunnelStopped
trackedTunnelsLock.Unlock()
IPCServerNotifyTunnelChange(tunnelName, TunnelStopped, nil)
return true
}
return false
}
if checkForDisabled() {
return
}
runtime.LockOSThread()
defer runtime.UnlockOSThread()
lastState := TunnelUnknown
for {
err := windows.NotifyServiceStatusChange(service.Handle, serviceNotifications, notifier)
switch err {
case nil:
for {
if windows.SleepEx(uint32(time.Second*3/time.Millisecond), true) == windows.WAIT_IO_COMPLETION {
break
} else if checkForDisabled() {
return
}
}
case windows.ERROR_SERVICE_MARKED_FOR_DELETE:
trackedTunnelsLock.Lock()
trackedTunnels[tunnelName] = TunnelStopped
trackedTunnelsLock.Unlock()
IPCServerNotifyTunnelChange(tunnelName, TunnelStopped, nil)
return
case windows.ERROR_SERVICE_NOTIFY_CLIENT_LAGGING:
continue
default:
trackedTunnelsLock.Lock()
trackedTunnels[tunnelName] = TunnelStopped
trackedTunnelsLock.Unlock()
IPCServerNotifyTunnelChange(tunnelName, TunnelStopped, fmt.Errorf("Unable to continue monitoring service, so stopping: %v", err))
service.Control(svc.Stop)
return
}
state := svcStateToTunState(svc.State(notifier.ServiceStatus.CurrentState))
var tunnelError error
if state == TunnelStopped {
if notifier.ServiceStatus.Win32ExitCode == uint32(windows.ERROR_SERVICE_SPECIFIC_ERROR) {
maybeErr := services.Error(notifier.ServiceStatus.ServiceSpecificExitCode)
if maybeErr != services.ErrorSuccess {
tunnelError = maybeErr
}
} else {
switch notifier.ServiceStatus.Win32ExitCode {
case uint32(windows.NO_ERROR), uint32(windows.ERROR_SERVICE_NEVER_STARTED):
default:
tunnelError = syscall.Errno(notifier.ServiceStatus.Win32ExitCode)
}
}
}
if state != lastState {
trackedTunnelsLock.Lock()
trackedTunnels[tunnelName] = state
trackedTunnelsLock.Unlock()
IPCServerNotifyTunnelChange(tunnelName, state, tunnelError)
lastState = state
}
}
}
|