No Calling-Station-Id in Auth-Request

[open source]

hey guys
I have been trying to authenticate user based on mac-address. But the
problem is my pppd is not sending the mac address of clients in it's
Auth-Request.

I'm using following softwares:
(i)   rp-ppoe
(ii)  pppd-2.4.1
(iii) ppp-2.4.1-vanilla-radclient-v2.1.patch
(iv) freeradius-1.0.2

Can anyone tell me how to send the mac-address of the client in the
Auth-Request as Calling-Station_Id or anyother attribute/value pair.

Thanks in advance

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