saddr, daddr type determination

[Stephen Satchell <list@xxxxxxxxxxxx>]

OK, I'm trying to determine if the source address, using the FIB 
(routing table), is a broadcast or multicast address.  I'm making the 
rash assumption that the daddr type is accessed by using the meta 
pkttype in the output and forward chains:

> define wan0 = enp1s0
> iifname $wan protocol {tcp,udp} pkttype {broadcast, multicast} counter drop

Is there any way to do with for the source address using the FIB?

I need this to conform to BCP38 in my Linux router.