ASCII NUL in NAS-Filter-Rule

[Ruslan Pustovoytov]

Is my question about sending ascii nul in string attribute is wrong or 
nobody run into this situation ?

> Hi All
>
> My nas box can use attribute NAS-Filter-Rule from radius server to 
> construct filter rules per subscriber "on the fly".
> Accodingly to rfc 4849 this attribute should contain ascii NUL (0x00) 
> as a delimiter between individual filter rules and at the end of rules.
> Freeradius define this attribute as a string and I do not know how to 
> create valid string with nul character.
> I changed attribute type to octets and successfully add null character 
> but a whole string converted to hex also and attribute was not readable.
> How to send nul character without changing attribute type ?
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