var (
	osreldateOnce sync.Once
	osreldate     uint32
)

func supportsABI(ver uint32) bool {
	osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
	return osreldate >= ver
}

// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
type SockaddrDatalink struct {
	Len    uint8
	Family uint8
	Index  uint16

		{"Syscall12", Func, 0},
		{"Syscall15", Func, 0},
		{"Syscall18", Func, 12},
		{"Syscall6", Func, 0},
		{"Syscall9", Func, 0},
		{"SyscallN", Func, 18},
		{"Sysctl", Func, 0},
		{"SysctlUint32", Func, 0},
		{"Sysctlnode", Type, 2},
		{"Sysctlnode.Flags", Field, 2},
		{"Sysctlnode.Name", Field, 2},
		{"Sysctlnode.Num", Field, 2},
		{"Sysctlnode.Un", Field, 2},
		{"Sysctlnode.Ver", Field, 2},