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