PF_RT_TOS
snl_add_msg_attr_u8(nw, PF_RT_TOS, r->tos);
{ .type = PF_RT_TOS, .off = _OUT(r.tos), .cb = snl_attr_get_uint8 },
nlattr_add_u8(nw, PF_RT_TOS, rule->tos);
{ .type = PF_RT_TOS, .off = _OUT(tos), .cb = nlattr_get_uint8 },