How to send empty value via radclient?

[Arran Cudbard-Bell]

RFC 2865 Page 24

      string    1-253 octets containing binary data (values 0 through
                255 decimal, inclusive).  Strings of length zero (0)
                MUST NOT be sent; omit the entire attribute instead.

If your NAS requires zero length strings then its breaking the RADIUS protocol standard.

-Arran


On Jun 27, 2011, at 9:10 AM, Alexander Kubatkin wrote:

> Hello,
> 
> Need to send empty value in attribute via coa request for clear any
> value in current state of attribute and clear attribute itself:
> 
> # /bin/echo "Context-Name = local, Qos-Policing-Profile-Name='' ,
> Qos-Metering-Profile-Name='' , Framed-IP-Address = yy.yy.yy.yy" |
> /usr/local/bin/radclient -x -t 3 -c 1 -r 2 -p 4 xx.xx.xx.xx:3799 coa xxxxxx
> Sending CoA-Request of id 121 to xx.xx.xx.xx port 3799
>         Context-Name = "dhcp"
>         Qos-Policing-Profile-Name = ""
>         Qos-Metering-Profile-Name = ""
>         Framed-IP-Address = yy.yy.yy.yy
> rad_recv: CoA-NAK packet from host xx.xx.xx.xx port 3799, id=121, length=32
>         Error-Cause = Missing-Attribute
>         Event-Timestamp = "Jun 27 2011 10:48:37 MSD"
> 
> 
> Missing-Attribute is because NAS doesn't receive two attributes
> Qos-Policing-Profile-Name and Qos-Metering-Profile-Name because
> radclient doesn't really send it or filtered it, i.e. NAS only received
> Context-Name and Framed-IP-Address, is this possible to send empty value?
> 
> 
> -- 
> Alexander Kubatkin
> -
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> 

Arran Cudbard-Bell
a.cudbardb at freeradius.org

RADIUS - Half the complexity of Diameter