2022-12-16 18:06:45 +05:30
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# Workerman-DNS
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2022-12-16 18:08:57 +05:30
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[Workerman](https://www.workerman.net/)的DNS协议，实现了简单的DNS协议解析和响应，通过本协议支持，您可以利用[Workerman](https://www.workerman.net/)实现基于PHP的Dns服务器
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2022-12-16 18:06:45 +05:30
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目前支持以下DNS类型：
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* A
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* AAAA
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* CNAME
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* SOA
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* PTR
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* MX
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* TXT
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> 本仓库内vendor文件夹为[Workerman](https://www.workerman.net/)
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>
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> 您可以删除，直接将本仓库根目录下的 Dns.php 放置到您的Workerman项目中的 /vendor/workerman/workerman/Protocols 目录下
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---
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## 使用方式：
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详见start.php 文件
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> 注意：使用53端口需要root权限
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#### 1.监听端口
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```php
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<?php
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use Workerman\Worker;
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use Workerman\Connection\TcpConnection;
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use Workerman\Protocols\Http\Request;
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require_once __DIR__ . '/php-ipv6.php'; #IPv6支持
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require_once __DIR__ . '/vendor/autoload.php';
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$worker = new Worker('Dns://0.0.0.0:53');
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$worker->transport = 'udp';
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```
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#### 2.获取查询内容
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```php
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$worker->onMessage = function($connection, $data){
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$data=json_decode($data);
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$type=$data->type; #查询类型
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$name=$data->name; #查询内容(一般是域名，PTR时为倒序IP)
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$rip=$connection->getRemoteIp(); #客户端IP
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#输出信息
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echo "\n Type:$type \n Domain: $name\n Client IP: $rip \n";
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}
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```
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#### 3.响应A记录
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```php
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$worker->onMessage = function($connection, $data){
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$send['type']='A';
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$send['detail'][1]='119.29.29.29'; #第一条记录
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$send['detail'][2]='8.8.8.8'; #第二条记录
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$send['ttl']=30;
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#id和query一般情况下直接返回输出即可
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$send['id']=$data->id;
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$send['query']=$data->query;
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$send=json_encode($send);
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$connection->send($send);
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};
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Worker::runAll();
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```
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#### 4.响应其他记录
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见start.php 内有所有记录类型的响应方式
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#### 5.说明
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您应当通过获取query的 `$name`通过查询数据库等方式返回数据，对于不存在的记录应当返回SOA记录
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您需要的时候可以通过 `dns_get_record()`向上级DNS递归查找并缓存
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这一系列操作，本协议不提供，您可以自行通过Redis等并利用workerman实现
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不建议作为根域名的NS服务器使用
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## 已知问题
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本协议最早写于鄙人刚学习php的阶段，现在翻出来无疑是屎山一坨，代码写的和xxs一样，性能不敢测试，还请各位大佬包容
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目前已知问题是：
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域名不存在时可能出现BUG
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