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) 2017-2019 WireGuard LLC. All Rights Reserved.
*/
package service
import (
"bufio"
"fmt"
"golang.zx2c4.com/winipcfg"
"log"
"strings"
"golang.org/x/sys/windows/svc"
"golang.org/x/sys/windows/svc/debug"
"golang.org/x/sys/windows/svc/eventlog"
"golang.zx2c4.com/wireguard/windows/conf"
"golang.zx2c4.com/wireguard/windows/service/tun"
)
type confElogger struct {
elog debug.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
debug bool
}
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 elog debug.Log
var err error
if service.debug {
elog = debug.New("WireGuard")
} else {
//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 {
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_LOG_CONTAINER_OPEN_FAILED
return
}
}
log.SetOutput(elogger{elog})
defer func() {
if x := recover(); x != nil {
elog.Error(1, fmt.Sprint(x))
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())
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_OPEN_FAILED
return
}
logger := &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", 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)
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_ADAP_HDW_ERR
return
}
device := NewDevice(wintun, logger)
device.Up()
logger.Info.Println("Device started")
uapi, err := UAPIListen(conf.Name)
if err != nil {
logger.Error.Println("Failed to listen on uapi socket:", err)
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_PIPE_LISTENING
device.Close()
return
}
errs := make(chan error)
go func() {
for {
conn, err := uapi.Accept()
if err != nil {
errs <- err
return
}
go ipcHandle(device, conn)
}
}()
logger.Info.Println("UAPI listener started")
uapiConf, err := conf.ToUAPI()
if err != nil {
logger.Error.Println("Failed to convert to UAPI serialization:", err)
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_INVALID_PARAMETER
device.Close()
return
}
ipcSetOperation(device, bufio.NewReader(strings.NewReader(uapiConf)))
guid := wintun.(*tun.NativeTun).GUID()
routeMonitorCallback, err := monitorDefaultRoutes(device.net.bind.(*NativeBind), &guid)
if err != nil {
logger.Error.Println("Unable to bind sockets to default route:", err)
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_NETWORK_BUSY
device.Close()
return
}
err = configureInterface(conf, &guid)
if err != nil {
logger.Error.Println("Unable to set interface addresses, routes, DNS, or IP settings:", err)
changes <- svc.Status{State: svc.StopPending}
exitCode = ERROR_NETWORK_BUSY
device.Close()
return
}
changes <- svc.Status{State: svc.Running, Accepts: svc.AcceptStop}
loop:
for {
select {
case c := <-r:
switch c.Cmd {
case svc.Stop:
break loop
case svc.Interrogate:
changes <- c.CurrentStatus
default:
logger.Error.Printf("Unexpected service control request #%d", c)
}
case <-errs:
break loop
case <-device.Wait():
break loop
}
}
changes <- svc.Status{State: svc.StopPending}
logger.Info.Println("Shutting down")
winipcfg.UnregisterRouteChangeCallback(routeMonitorCallback)
uapi.Close()
device.Close()
return
}
|