-
Notifications
You must be signed in to change notification settings - Fork 5
/
ip.go
140 lines (119 loc) · 2.08 KB
/
ip.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
132
133
134
135
136
137
138
139
140
package rocketmq
import (
"errors"
"net"
)
// GetIP returns local address
func GetIP() ([]byte, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return nil, errors.New("unknow_ip")
}
var internalIP []byte
for _, a := range addrs {
ipnet, ok := a.(*net.IPNet)
if !ok {
continue
}
ip := ipnet.IP
if ip.IsLoopback() {
continue
}
if ip = ip.To4(); ip == nil {
continue
}
if checkIP(ip) {
if !isInternalIP(ip) {
return ip, nil
}
internalIP = ip
}
}
if internalIP != nil {
return internalIP, nil
}
return nil, errors.New("unknow_ip")
}
// GetIPStr return the ip address as readable style
func GetIPStr() (string, error) {
ip, err := getIP()
if err != nil {
return "", err
}
return ip.String(), nil
}
func getIP() (net.IP, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return nil, errors.New("unknow_ip")
}
var internalIP net.IP
for _, a := range addrs {
ipnet, ok := a.(*net.IPNet)
if !ok {
continue
}
ip := ipnet.IP
if ip.IsLoopback() {
continue
}
if ip = ip.To4(); ip == nil {
continue
}
if checkIP(ip) {
if !isInternalIP(ip) {
return ip, nil
}
internalIP = ip
}
}
if internalIP != nil {
return internalIP, nil
}
return nil, errors.New("unknow_ip")
}
func checkIP(ip []byte) bool {
if ip[0] >= 1 && ip[0] <= 126 {
if ip[1] == 1 && ip[2] == 1 && ip[3] == 1 {
return false
}
if ip[1] == 0 && ip[2] == 0 && ip[3] == 0 {
return false
}
return true
}
if ip[0] >= 128 && ip[0] <= 191 {
if ip[2] == 1 && ip[3] == 1 {
return false
}
if ip[2] == 0 && ip[3] == 0 {
return false
}
return true
}
if ip[0] >= 192 && ip[0] <= 223 {
if ip[3] == 1 {
return false
}
if ip[3] == 0 {
return false
}
return true
}
return false
}
func isInternalIP(ip []byte) bool {
//10.0.0.0~10.255.255.255
//172.16.0.0~172.31.255.255
//192.168.0.0~192.168.255.255
switch {
case ip[0] == 10:
return true
case ip[0] == 172 && ip[1] >= 16 && ip[1] <= 31:
return true
case ip[0] == 192 && ip[1] == 168:
return true
default:
return false
}
}