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
|
package main
import (
"errors"
"net"
)
type UDPBind interface {
SetMark(value uint32) error
ReceiveIPv6(buff []byte, end *Endpoint) (int, error)
ReceiveIPv4(buff []byte, end *Endpoint) (int, error)
Send(buff []byte, end *Endpoint) error
Close() error
}
func parseEndpoint(s string) (*net.UDPAddr, error) {
// ensure that the host is an IP address
host, _, err := net.SplitHostPort(s)
if err != nil {
return nil, err
}
if ip := net.ParseIP(host); ip == nil {
return nil, errors.New("Failed to parse IP address: " + host)
}
// parse address and port
addr, err := net.ResolveUDPAddr("udp", s)
if err != nil {
return nil, err
}
return addr, err
}
func UpdateUDPListener(device *Device) error {
device.mutex.Lock()
defer device.mutex.Unlock()
netc := &device.net
netc.mutex.Lock()
defer netc.mutex.Unlock()
// close existing sockets
if netc.bind != nil {
println("close bind")
if err := netc.bind.Close(); err != nil {
return err
}
netc.bind = nil
println("closed")
}
// open new sockets
if device.tun.isUp.Get() {
println("creat")
// bind to new port
var err error
netc.bind, netc.port, err = CreateUDPBind(netc.port)
if err != nil {
return err
}
// set mark
err = netc.bind.SetMark(netc.fwmark)
if err != nil {
return err
}
println("okay")
// clear cached source addresses
for _, peer := range device.peers {
peer.mutex.Lock()
peer.endpoint.value.ClearSrc()
peer.mutex.Unlock()
}
}
return nil
}
func CloseUDPListener(device *Device) error {
netc := &device.net
netc.mutex.Lock()
defer netc.mutex.Unlock()
return netc.bind.Close()
}
|
