More consts

cmd/metal-api/internal/metal/machine.go

@@ -284,17 +284,17 @@ func validatePorts(ports []int) error {
 }
 
 func validateCIDRs(cidrs []string) error {
-	af := ""
+	var af AddressFamily
 	for _, cidr := range cidrs {
 		p, err := netip.ParsePrefix(cidr)
 		if err != nil {
 			return fmt.Errorf("invalid cidr: %w", err)
 		}
-		var newaf string
+		var newaf AddressFamily
 		if p.Addr().Is4() {
-			newaf = "ipv4"
+			newaf = IPv4AddressFamily
 		} else if p.Addr().Is6() {
-			newaf = "ipv6"
+			newaf = IPv6AddressFamily
 		}
 		if af != "" && af != newaf {
 			return fmt.Errorf("mixed address family in one rule is not supported:%v", cidrs)

cmd/metal-api/internal/metal/network.go

@@ -4,6 +4,7 @@ import (
 	"net"
 	"net/netip"
 	"strconv"
+	"strings"
 
 	"github.com/samber/lo"
 )
@@ -239,10 +240,10 @@ const (
 
 // ToAddressFamily will convert a string af to a AddressFamily
 func ToAddressFamily(af string) AddressFamily {
-	switch af {
-	case "IPv4", "ipv4":
+	switch strings.ToLower(af) {
+	case "ipv4":
 		return IPv4AddressFamily
-	case "IPv6", "ipv6":
+	case "ipv6":
 		return IPv6AddressFamily
 	}
 	return IPv4AddressFamily