PF_RT_RPOOL_RDR
snl_add_msg_attr_rpool(nw, PF_RT_RPOOL_RDR, &r->rdr);
{ .type = PF_RT_RPOOL_RDR, .off = _OUT(r.rdr), .arg = &pool_parser, .cb = snl_attr_get_nested },
{ .type = PF_RT_RPOOL_RDR, .off = _OUT(rdr), .arg = &pool_parser, .cb = nlattr_get_nested },
nlattr_add_pool(nw, PF_RT_RPOOL_RDR, &rule->rdr);