Created
September 11, 2022 16:50
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List IP addresses
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| package main | |
| import ( | |
| "fmt" | |
| "log" | |
| "net" | |
| "os" | |
| "strings" | |
| ) | |
| func main() { | |
| if len(os.Args) > 1 { | |
| printAddrs(GetLocalAddresses(os.Args[1])) | |
| } else { | |
| printAddrs(GetAllLocalAddresses()) | |
| } | |
| } | |
| func GetAllLocalAddresses() []net.Addr { | |
| addr, err := net.InterfaceAddrs() | |
| if err != nil { | |
| log.Fatalln("InterfaceAddrs:", err) | |
| } | |
| return addr | |
| } | |
| func GetLocalAddresses(dev string) []net.Addr { | |
| ifi, err := net.InterfaceByName(dev) | |
| if err != nil { | |
| log.Fatalln("InterfaceByName:", err) | |
| } | |
| addr, err := ifi.Addrs() | |
| if err != nil { | |
| log.Fatalln("Addrs:", err) | |
| } | |
| return addr | |
| } | |
| func printAddrs(addr []net.Addr) { | |
| for _, a := range addr { | |
| ipstr := strings.Split(a.String(), "/")[0] | |
| ip := net.ParseIP(ipstr) | |
| if ip == nil { | |
| log.Fatalln("Parse failed:", ipstr) | |
| } | |
| if isValidForSet(ip) { | |
| fmt.Println(ip) | |
| } | |
| } | |
| } | |
| func isValidForSet(ip net.IP) bool { | |
| if ip.To4() == nil && ip.IsLinkLocalUnicast() { | |
| return false | |
| } | |
| if ip.IsLoopback() { | |
| return false | |
| } | |
| return true | |
| } |
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