Code refactoring for #1283

Author: AlexxIT

pkg/mdns/client.go

@@ -192,9 +192,6 @@ func (b *Browser) ListenMulticastUDP() error {
 	for _, ipn := range nets {
 		conn, err := lc1.ListenPacket(ctx, "udp4", ipn.IP.String()+":5353") // same port important
 		if err != nil {
-			if strings.Contains(err.Error(), "address already in use") {
-				continue
-			}
 			continue
 		}
 		b.Nets = append(b.Nets, ipn)
@@ -380,43 +377,3 @@ func NewServiceEntries(msg *dns.Msg, ip net.IP) (entries []*ServiceEntry) {
 
 	return
 }
-
-func InterfacesIP4() ([]net.IP, error) {
-	intfs, err := net.Interfaces()
-	if err != nil {
-		return nil, err
-	}
-
-	var ips []net.IP
-
-loop:
-	for _, intf := range intfs {
-		if intf.Flags&net.FlagUp == 0 || intf.Flags&net.FlagLoopback != 0 {
-			continue
-		}
-
-		addrs, err := intf.Addrs()
-		if err != nil {
-			continue
-		}
-
-		for _, addr := range addrs {
-			switch v := addr.(type) {
-			case *net.IPNet:
-				if ip := v.IP.To4(); ip != nil {
-					if ip.IsLinkLocalUnicast() {
-						continue
-					}
-					ips = append(ips, ip)
-					continue loop
-				}
-			}
-		}
-	}
-
-	if len(ips) == 0 {
-		return nil, errors.New("no IPv4 addresses found")
-	}
-
-	return ips, nil
-}