PF_RT_RULE_FLAG
snl_add_msg_attr_u32(nw, PF_RT_RULE_FLAG, r->rule_flag);
{ .type = PF_RT_RULE_FLAG, .off = _OUT(r.rule_flag), .cb = snl_attr_get_uint32 },
{ .type = PF_RT_RULE_FLAG, .off = _OUT(rule_flag), .cb = nlattr_get_uint32 },
nlattr_add_u32(nw, PF_RT_RULE_FLAG, rule->rule_flag);