MapResultHook allows modifying the allocation results after
they have been received, and before Radiator has processed the
MapAttribute definitions.
This example complies with how some
vendors require uplink addresses as host routes with a /128 prefix for the
requesting routers.
MapAttribute iaprefix, Delegated-IPv6-Prefix
MapAttribute iaaddr, Framed-IPv6-Prefix
MapResultHook sub { my $result = $_[0]; \
$result->{iaaddr} .= "/128" if $result->{iaaddr}; }