forked from v2fly/v2ray-core
-
Notifications
You must be signed in to change notification settings - Fork 0
/
listener.go
131 lines (110 loc) · 2.66 KB
/
listener.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
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
// +build !windows
package domainsocket
import (
"context"
gotls "crypto/tls"
"os"
"strings"
"syscall"
"v2ray.com/core/common"
"v2ray.com/core/common/net"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/internet/tls"
)
type Listener struct {
addr *net.UnixAddr
ln net.Listener
tlsConfig *gotls.Config
config *Config
addConn internet.ConnHandler
locker *fileLocker
}
func Listen(ctx context.Context, address net.Address, port net.Port, handler internet.ConnHandler) (internet.Listener, error) {
settings := getSettingsFromContext(ctx)
if settings == nil {
return nil, newError("domain socket settings not specified.")
}
addr, err := settings.GetUnixAddr()
if err != nil {
return nil, err
}
unixListener, err := net.ListenUnix("unix", addr)
if err != nil {
return nil, newError("failed to listen domain socket").Base(err).AtWarning()
}
ln := &Listener{
addr: addr,
ln: unixListener,
config: settings,
addConn: handler,
}
if !settings.Abstract {
ln.locker = &fileLocker{
path: settings.Path + ".lock",
}
if err := ln.locker.Acquire(); err != nil {
unixListener.Close()
return nil, err
}
}
if config := tls.ConfigFromContext(ctx); config != nil {
ln.tlsConfig = config.GetTLSConfig()
}
go ln.run()
return ln, nil
}
func (ln *Listener) Addr() net.Addr {
return ln.addr
}
func (ln *Listener) Close() error {
if ln.locker != nil {
ln.locker.Release()
}
return ln.ln.Close()
}
func (ln *Listener) run() {
for {
conn, err := ln.ln.Accept()
if err != nil {
if strings.Contains(err.Error(), "closed") {
break
}
newError("failed to accepted raw connections").Base(err).AtWarning().WriteToLog()
continue
}
if ln.tlsConfig != nil {
conn = tls.Server(conn, ln.tlsConfig)
}
ln.addConn(internet.Connection(conn))
}
}
type fileLocker struct {
path string
file *os.File
}
func (fl *fileLocker) Acquire() error {
f, err := os.Create(fl.path)
if err != nil {
return err
}
if err := syscall.Flock(int(f.Fd()), syscall.LOCK_EX); err != nil {
f.Close()
return newError("failed to lock file: ", fl.path).Base(err)
}
fl.file = f
return nil
}
func (fl *fileLocker) Release() {
if err := syscall.Flock(int(fl.file.Fd()), syscall.LOCK_UN); err != nil {
newError("failed to unlock file: ", fl.path).Base(err).WriteToLog()
}
if err := fl.file.Close(); err != nil {
newError("failed to close file: ", fl.path).Base(err).WriteToLog()
}
if err := os.Remove(fl.path); err != nil {
newError("failed to remove file: ", fl.path).Base(err).WriteToLog()
}
}
func init() {
common.Must(internet.RegisterTransportListener(internet.TransportProtocol_DomainSocket, Listen))
}