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67 lines
1.3 KiB
67 lines
1.3 KiB
6 years ago
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package ip
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import (
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"net"
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"strings"
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)
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// ExternalIP get external ip.
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func ExternalIP() (res []string) {
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inters, err := net.Interfaces()
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if err != nil {
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return
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}
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for _, inter := range inters {
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if !strings.HasPrefix(inter.Name, "lo") {
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addrs, err := inter.Addrs()
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if err != nil {
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continue
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}
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for _, addr := range addrs {
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if ipnet, ok := addr.(*net.IPNet); ok {
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if ipnet.IP.IsLoopback() || ipnet.IP.IsLinkLocalMulticast() || ipnet.IP.IsLinkLocalUnicast() {
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continue
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}
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if ip4 := ipnet.IP.To4(); ip4 != nil {
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switch true {
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case ip4[0] == 10:
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continue
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case ip4[0] == 172 && ip4[1] >= 16 && ip4[1] <= 31:
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continue
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case ip4[0] == 192 && ip4[1] == 168:
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continue
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default:
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res = append(res, ipnet.IP.String())
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}
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}
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}
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}
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}
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}
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return
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}
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// InternalIP get internal ip.
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func InternalIP() string {
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inters, err := net.Interfaces()
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if err != nil {
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return ""
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}
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for _, inter := range inters {
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if !strings.HasPrefix(inter.Name, "lo") {
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addrs, err := inter.Addrs()
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if err != nil {
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continue
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}
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for _, addr := range addrs {
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if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
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if ipnet.IP.To4() != nil {
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return ipnet.IP.String()
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}
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}
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}
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}
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}
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return ""
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}
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