if max == 0 {
			return 0
		}
		max--
	}
	return max
}

// broadcastAddress returns the broadcast address of the subnet
// The broadcast address is obtained by setting all the host bits
// in a subnet to 1.
// network 192.168.0.0/24 : subnet bits 24 host bits 32 - 24 = 8
// broadcast address 192.168.0.255
func broadcastAddress(subnet netip.Prefix) (netip.Addr, error) {
	base := subnet.Masked().Addr()

	// the broadcast address is not considered contained for IPv4
	if !ip.Is6() {
		ipLast, err := broadcastAddress(prefix)
		if err != nil || ipLast == ip {
			return false
		}
	}
	return prefix.Contains(ip)
}

// TODO(aojea) consolidate all these IPs utils
// pkg/registry/core/service/ipallocator/ipallocator.go
// broadcastAddress returns the broadcast address of the subnet

// will be fixed to change variable type as suitable.

type SockaddrGen [24]byte

type InterfaceInfo struct {
	Flags            uint32
	Address          SockaddrGen
	BroadcastAddress SockaddrGen
	Netmask          SockaddrGen
}

type IpAddressString struct {
	String [16]byte
}

type IpMaskString IpAddressString

type IpAddrString struct {
	Next      *IpAddrString

// will be fixed to change variable type as suitable.

type SockaddrGen [24]byte

type InterfaceInfo struct {
	Flags            uint32
	Address          SockaddrGen
	BroadcastAddress SockaddrGen
	Netmask          SockaddrGen
}

type IpAddressString struct {
	String [16]byte
}

type IpMaskString IpAddressString

type IpAddrString struct {

		{"InterfaceAnnounceMessage", Type, 1},
		{"InterfaceAnnounceMessage.Header", Field, 1},
		{"InterfaceInfo", Type, 0},
		{"InterfaceInfo.Address", Field, 0},
		{"InterfaceInfo.BroadcastAddress", Field, 0},
		{"InterfaceInfo.Flags", Field, 0},
		{"InterfaceInfo.Netmask", Field, 0},
		{"InterfaceMessage", Type, 0},
		{"InterfaceMessage.Data", Field, 0},
		{"InterfaceMessage.Header", Field, 0},