PFR_A_NET
snl_add_msg_attr_u8(nw, PFR_A_NET, addr->pfra_net);
{ .type = PFR_A_NET, .off = _OUT(pfra_net), .cb = snl_attr_get_uint8 },
{ .type = PFR_A_NET, .off = _OUT(pfra_net), .cb = nlattr_get_uint8 },
nlattr_add_u8(nw, PFR_A_NET, a->pfra_net);