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
|
package main
import (
"bytes"
"errors"
"flag"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/network"
"github.com/docker/go-connections/nat"
"net/http"
"time"
)
const(
vpnHostNetworkName = "vpnhostnet"
)
var vpnContainerID string
var vpnNetworkID string
var vpnHostNetworkID string
var remoteAddress* string
var remotePort* int
func registerAccessFlags() {
remoteAddress = flag.String("vpnRemoteAddress", "", "The remote domain name or IP the VPN will run on")
remotePort = flag.Int("vpnRemotePort", 1194, "The port the VPN should listen on")
}
func startVPN() (err error) {
// Set up our context and Docker CLI connection
setupContext()
setupDockerCLI()
// Set up network
err = setupNetwork()
if(err != nil) {
return err
}
err = setupVPNHostNetwork()
if err != nil {
return err
}
// Create container
resp, err := dockerCli.ContainerCreate(dockerCtx, &container.Config{
Image: "circus-vpn",
Env: []string{
fmt.Sprintf("remoteAddress=%s", *remoteAddress),
fmt.Sprintf("remotePort=%d", *remotePort),
},
ExposedPorts: map[nat.Port]struct{}{
"1194/udp": {},
},
}, &container.HostConfig{
Privileged: true,
PortBindings: nat.PortMap{
"1194/udp": []nat.PortBinding{
{
HostIP: "0.0.0.0",
HostPort: "1194",
},
},
},
}, &network.NetworkingConfig{
EndpointsConfig: map[string]*network.EndpointSettings{
"startpoint": {
NetworkID: vpnHostNetworkID,
},
},
}, "")
if err != nil {
return err
}
// Attach container network to VPN container
err = dockerCli.NetworkConnect(dockerCtx, vpnNetworkID, resp.ID, &network.EndpointSettings{})
if err != nil {
return err
}
// Start container
err = dockerCli.ContainerStart(dockerCtx, resp.ID, types.ContainerStartOptions{})
if err != nil {
return err
}
vpnContainerID = resp.ID
return nil
}
func stopVPN() {
setupContext()
setupDockerCLI()
timeout := time.Second * 5
dockerCli.ContainerStop(dockerCtx, vpnContainerID, &timeout)
vpnContainerID = ""
}
func setupNetwork() (error) {
setupContext()
setupDockerCLI()
if vpnNetworkID == "" {
response, err := dockerCli.NetworkCreate(dockerCtx, VPNNetworkName, types.NetworkCreate{
Internal: true,
})
if err != nil {
return err
}
vpnNetworkID = response.ID
}
return nil
}
func setupVPNHostNetwork() (error) {
setupContext()
setupDockerCLI()
if vpnHostNetworkID == "" {
response, err := dockerCli.NetworkCreate(dockerCtx, vpnHostNetworkName, types.NetworkCreate{
Internal: false,
})
if err != nil {
return err
}
vpnHostNetworkID = response.ID
}
return nil
}
func getCertificate() (string, error) {
if vpnContainerID == "" {
return "", errors.New("VPN container not up")
}
// Get IP of VPN container
inspectJSON, err := dockerCli.ContainerInspect(dockerCtx, vpnContainerID)
if err != nil {
return "", err
}
// get certificate
var certResponse *http.Response
for i := 0; i < 10; i++ {
certResponse, err = http.Get(fmt.Sprintf("http://%s:9999/", inspectJSON.NetworkSettings.Networks[VPNNetworkName].IPAddress))
if err == nil {
break
}
time.Sleep(time.Second)
}
if err != nil {
return "", err
}
buffer := make([]byte, 1024)
certResponse.Body.Read(buffer)
return string(bytes.Trim(buffer, "\x00")), nil
}
|
