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 |
package main
import (
"crypto/tls"
"io"
"log"
"net"
"time"
)
const (
timeOutTime = time.Second * 10
keepAliveTime = time.Second * 60
)
var (
lAddr = ":8082"
tAddr = ":8083"
)
func main() {
var cf, kf = "cert.pem", "key.pem"
cert, err := tls.LoadX509KeyPair(cf, kf)
if err != nil {
log.Println(err)
return
}
// run
config := &tls.Config{
Certificates: []tls.Certificate{cert},
}
log.Println(config.ServerName)
ln, err := tls.Listen("tcp", lAddr, config)
if err != nil {
log.Printf("build listener failed:%s", err.Error())
return
}
defer ln.Close()
log.Println(ln.Addr())
// run loop
for {
conn, err := ln.Accept()
if err != nil {
log.Printf("accept failed:%s", err.Error())
if opErr, ok := err.(*net.OpError); ok {
if !opErr.Temporary() {
break
}
}
continue
}
log.Println("new client:", conn.LocalAddr().(*net.TCPAddr), conn.RemoteAddr())
go handleConn(conn)
}
}
func forward(source net.Conn, dest net.Conn) {
defer dest.Close()
defer source.Close()
_, _ = io.Copy(dest, source)
}
func handleConn(source net.Conn) {
d := net.Dialer{
Timeout: timeOutTime,
KeepAlive: keepAliveTime,
}
dest, err := d.Dial("tcp", tAddr)
if err != nil {
_ = source.Close()
log.Printf("connect to %s failed: %s", tAddr, err.Error())
return
}
go forward(source, dest.(*net.TCPConn))
forward(dest.(*net.TCPConn), source)
}
|