| 6 | ) |
| 7 | |
| 8 | func getIP() (net.IP, error) { |
| 9 | ifaces, err := net.Interfaces() |
| 10 | if err != nil { |
| 11 | return nil, err |
| 12 | } |
| 13 | for _, iface := range ifaces { |
| 14 | if iface.Flags&net.FlagUp == 0 { |
| 15 | continue // interface down |
| 16 | } |
| 17 | if iface.Flags&net.FlagLoopback != 0 { |
| 18 | continue // loopback interface |
| 19 | } |
| 20 | addrs, err := iface.Addrs() |
| 21 | if err != nil { |
| 22 | return nil, err |
| 23 | } |
| 24 | for _, addr := range addrs { |
| 25 | var ip net.IP |
| 26 | switch v := addr.(type) { |
| 27 | case *net.IPNet: |
| 28 | ip = v.IP |
| 29 | case *net.IPAddr: |
| 30 | ip = v.IP |
| 31 | } |
| 32 | if ip == nil || ip.IsLoopback() { |
| 33 | continue |
| 34 | } |
| 35 | ip = ip.To4() |
| 36 | if ip == nil { |
| 37 | continue // not an ipv4 address |
| 38 | } |
| 39 | return ip, nil |
| 40 | } |
| 41 | } |
| 42 | return nil, errors.New("Can't find IP address") |
| 43 | } |