Re: Using attribute reference from variable content in unlang

30 Jan 2023

      On Jan 30, 2023, at 4:19 AM, Charles-Antoine Guillat-Guignard via Freeradius-Users <freeradius-users@lists.freeradius.org> wrote:
...
I am trying to implement some db based attribute handling (names, operator and values from db), and I am struggling with a dynamic handling of attributes references (names).
Looking at https://freeradius.org/radiusd/man/unlang.txt (ATTRIBUTE REFERENCES section), I see no exemple matching what I want to do (attribute name is always known, and static).
Yes.
...
What I try to achieve would look a bit like that (which doesn't work) : :
# Exemple for Attributes-Actions values
# A-AL-AAA,:=,1
# A-AL-DHCP,:=,0
You could just put those fieds into a DB, and use the existing DB queries, such as SQL, but it doesn't matter a lot.
...
foreach &Attributes-Actions {
  update request {
      Attributes-Action := "%{Foreach-Variable-2}"
  }
%{explode:Attributes-Action ,}
update reply {
      # for debugging, contains expected value
      Reply-Message += "index 0 : %{Attributes-Action[0]}"
      # this fails
      "%{Attributes-Action[0]}" := "%{Attributes-Action[2]}"
  }
}
The "update" syntax allows things like:

	update control {
		Tmp-String-0 := "&reply:Reply-Message"
	}

	update {
		"%{control:Tmp-String-0}" += "Hello"
	}

  That works.  It's not well documented, but it does work.  I'll see if I can poke it.

  Oh, and don't use 3.0.12.  It's very old.  There are updated packages available at http://packages.networkradius.com

  Alan DeKok.