-
Notifications
You must be signed in to change notification settings - Fork 27
/
app_linux.go
82 lines (70 loc) · 2.3 KB
/
app_linux.go
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
// Copyright 2023 Jigsaw Operations LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"io"
"os"
"os/signal"
"sync"
"golang.org/x/sys/unix"
)
func (app App) Run() error {
// this WaitGroup must Wait() after tun is closed
trafficCopyWg := &sync.WaitGroup{}
defer trafficCopyWg.Wait()
tun, err := newTunDevice(app.RoutingConfig.TunDeviceName, app.RoutingConfig.TunDeviceIP)
if err != nil {
return fmt.Errorf("failed to create tun device: %w", err)
}
defer tun.Close()
// disable IPv6 before resolving Shadowsocks server IP
prevIPv6, err := enableIPv6(false)
if err != nil {
return fmt.Errorf("failed to disable IPv6: %w", err)
}
defer enableIPv6(prevIPv6)
ss, err := NewOutlineDevice(*app.TransportConfig)
if err != nil {
return fmt.Errorf("failed to create OutlineDevice: %w", err)
}
defer ss.Close()
ss.Refresh()
// Copy the traffic from tun device to OutlineDevice bidirectionally
trafficCopyWg.Add(2)
go func() {
defer trafficCopyWg.Done()
written, err := io.Copy(ss, tun)
logging.Info.Printf("tun -> OutlineDevice stopped: %v %v\n", written, err)
}()
go func() {
defer trafficCopyWg.Done()
written, err := io.Copy(tun, ss)
logging.Info.Printf("OutlineDevice -> tun stopped: %v %v\n", written, err)
}()
err = setSystemDNSServer(app.RoutingConfig.DNSServerIP)
if err != nil {
return fmt.Errorf("failed to configure system DNS: %w", err)
}
defer restoreSystemDNSServer()
if err := startRouting(ss.GetServerIP().String(), app.RoutingConfig); err != nil {
return fmt.Errorf("failed to configure routing: %w", err)
}
defer stopRouting(app.RoutingConfig.RoutingTableID)
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, os.Interrupt, unix.SIGTERM, unix.SIGHUP)
s := <-sigc
logging.Info.Printf("received %v, terminating...\n", s)
return nil
}