PFR_A_AF
snl_add_msg_attr_u8(nw, PFR_A_AF, addr->pfra_af);
{ .type = PFR_A_AF, .off = _OUT(pfra_af), .cb = snl_attr_get_uint32 },
{ .type = PFR_A_AF, .off = _OUT(pfra_af), .cb = nlattr_get_uint8 },
nlattr_add_u32(nw, PFR_A_AF, a->pfra_af);