Adapting Reply-Msg to Reject cause

Hello, I'm using Freeradius with rlm_sql & sqlcounter to authorize access to hotspots. I would like to set a specific Reply-Message (which is displayed in the user browser) depending the Reject cause, for instance: - Reply-Msg="Account has expired" (if reject because of Expiration == XXXX) - Reply-Msg="Time credit is exhausted" (if reject because of Max-All-Session := XXXX) - Reply-Msg="Access not allowed from this NAS" (if reject because of Nas-Identifier !=XXXX) - Reply-Msg="Wrong password" (if cannot authenticate) How can I do that without writing a custom authorization script ? Thanks for yout help. Yannick Deltroo