Filter ext_community?

[Chris Herdt]

I have a number of routes that include non-standard bgp_ext_community
entries, for example unknown 0x10b (VRF Route Import).

Is there a way to filter bgp_ext_community for only route targets?

I tried the following, but the ec datatype expects integers, not wildcards:

show route filter { if (rt, *, *) ~ bgp_ext_community then accept; reject;
} all

I'm using bird 2.0.2.

Thanks!

-- 
Chris Herdt