# 社区属性转换与本地优先级修正函数（BIRD 2.18 纯净稳定版）
function function_inet_community_make(){
    # 1. 从上游收到的路由 => 赋予兜底优先级 (Local Pref = 100)
    if bgp_large_community ~ [(LOCAL_ASN, 10100, 0)] then {
        bgp_local_pref = 100;
        bgp_large_community.add((LOCAL_ASN, 2, 4));
        bgp_large_community.delete((LOCAL_ASN, 10100, 0));
        return true;
    }

    # 2. 私有上游 => 赋予兜底优先级 (Local Pref = 100)
    if bgp_large_community ~ [(LOCAL_ASN, 10100, 1)] then {
        bgp_local_pref = 100;
        bgp_large_community.delete((LOCAL_ASN, 10100, 1));
        return true;
    }

    # 3. Peer/IXP 收到的路由 => 赋予中等优先 (Local Pref = 140)
    if bgp_large_community ~ [(LOCAL_ASN, 10100, 2), (LOCAL_ASN, 10100, 3)] then {
        bgp_local_pref = 140;
        bgp_large_community.add((LOCAL_ASN, 2, 4));
        bgp_large_community.delete([(LOCAL_ASN, 10100, 2), (LOCAL_ASN, 10100, 3)]);
        return true;
    }

    # 4. 下游客户发来的路由 => 赋予高优先级 (Local Pref = 180)
    if bgp_large_community ~ [(LOCAL_ASN, 10100, 4)] then {
        bgp_local_pref = 180;
        # 修复：BIRD 的 add 不支持中括号批量加，必须拆开单次调用
        bgp_large_community.add((LOCAL_ASN, 2, 1));
        bgp_large_community.add((LOCAL_ASN, 2, 2));
        bgp_large_community.add((LOCAL_ASN, 2, 3));
        bgp_large_community.add((LOCAL_ASN, 2, 4));
        bgp_large_community.delete((LOCAL_ASN, 10100, 4));
        return true;
    }

    # 5. 自身宣告的前缀 => 赋予最高级封顶 (Local Pref = 200)
    if bgp_large_community ~ [(LOCAL_ASN, 200, 0)] then {
        bgp_local_pref = 200;
        # 修复：拆开单独 add
        bgp_large_community.add((LOCAL_ASN, 2, 0));
        bgp_large_community.add((LOCAL_ASN, 2, 1));
        bgp_large_community.add((LOCAL_ASN, 2, 2));
        bgp_large_community.add((LOCAL_ASN, 2, 3));
        bgp_large_community.add((LOCAL_ASN, 2, 4));
        bgp_large_community.delete((LOCAL_ASN, 200, 0));
        return true;
    }

    return false;
}

# 社区安全检查/清理（全量通配版）
function function_inet_bgp_community_clear(){
    # 使用 [ (ASN, Data1, *) ] 语法，直接清空该分类下的所有子标记
    bgp_large_community.delete([
        (LOCAL_ASN, 1, *),
        (LOCAL_ASN, 2, *),
        (LOCAL_ASN, 3, *),
        (LOCAL_ASN, 200, *),
        (LOCAL_ASN, 10100, *),
        (LOCAL_ASN, 10101, *),
        (LOCAL_ASN, 10102, *)
    ]);
}