Unsupported empty lists - why?

[Maria Matějka]

On September 18, 2019 7:46:15 AM GMT+02:00, Nico Schottelius <nico.schottelius at ungleich.ch> wrote:
>
>Hello,
>
>being a bird 1.6 user (Debian), I find myself often
>in the situation that I'd like to define a variable in either bird.conf
>or bird6.conf and have a general.conf that defines the filters used in
>both protocols.
>
>However if I have a variable, for instance net_prefer_provider_a = [
>s.o.m.e/prefix+ ]; in bird6.conf, but not don't prefer IPv4 traffic
>from
>any network of this provider, I'd like to define
>
>net_prefer_provider_a = [];
>
>However this is not supported in bird1.6. Now I tried to get around
>this
>problem by using defined(), however this code also does not work:
>
>  if defined(net_prefer_to_a) then {
>      if net ~ net_prefer_to_a then {
>        bgp_local_pref  = pref_high;
>      }
>  }

You should declare net_prefer_to_a as a variable. And if you don't initialize it, then defined(...) is false. 

>net_prefer_to_a is defined in IPv6, but not in IPv4.
>
>This gives the error message:
>
>/etc/bird/general.conf:128:40 net_prefer_to_a: variable expected.

This means that the lexer doesn't know the symbol at all. 

Maria

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.