DNS BIND之dnsjava java客户端操作

缺乏、安全感 2022-08-07 15:57 197阅读 0赞

dnsjava是DNS的一个Java实现。支持所有定义的记录类型包括DNSSEC类型，和未知类型。它还可以用于查询，区域传输，动态更新。dnsjava还包含一个客户端使用的缓存，一个小型DNS服务器。它支持TSIG身份验证的消息，部分DNSSEC验证和EDNS0。

dnsjava提供的DNS高和低级别的访问功能。高级别的功能进行查询，对于一个给定的名称，类型和类的记录，然后返回答案，或者失败原因。也有相似的功能，对于与InetAddress类。缓存是用来减少发送DNS查询的数量。低级别的功能允许直接操纵的DNS的消息和记录，以及允许额外解析器属性进行设置。除dnsjava外，还有一些其他的java实现如：[dns4j][]，[dnsjnio][]，[jdnss][],[eagledns][]等

官网地址：[http://www.dnsjava.org/][http_www.dnsjava.org]

项目地址：[http://sourceforge.net/projects/dnsjava/][dns4j]

maven依赖：http://mvnrepository.com/artifact/dnsjava/dnsjava

<dependency>
    	<groupId>dnsjava</groupId>
    	<artifactId>dnsjava</artifactId>
    	<version>2.1.7</version>
    </dependency>

实例参考：

package cn.slimsmart.java.demo.dnsjava;
    
    import java.io.IOException;
    import java.net.InetAddress;
    import java.util.Iterator;
    import java.util.List;
    
    import org.xbill.DNS.ARecord;
    import org.xbill.DNS.DClass;
    import org.xbill.DNS.Flags;
    import org.xbill.DNS.Lookup;
    import org.xbill.DNS.Message;
    import org.xbill.DNS.Name;
    import org.xbill.DNS.Record;
    import org.xbill.DNS.Resolver;
    import org.xbill.DNS.Section;
    import org.xbill.DNS.SimpleResolver;
    import org.xbill.DNS.TSIG;
    import org.xbill.DNS.Type;
    import org.xbill.DNS.Update;
    import org.xbill.DNS.ZoneTransferIn;
    
    public class DNSJavaTest {
    
    	public static void main(String[] args) throws Exception {
    		// query();
    		//transferZone();
    		addRR();
    	}
    
    	// 查询
    	static void query() throws IOException {
    		Resolver resolver = new SimpleResolver("192.168.36.54");
    		resolver.setPort(53);
    		Lookup lookup = new Lookup("www.test.com", Type.A);
    		lookup.setResolver(resolver);
    		lookup.run();
    		if (lookup.getResult() == Lookup.SUCCESSFUL) {
    			System.out.println(lookup.getAnswers()[0].rdataToString());
    		}
    	}
    
    	static void transferZone() throws Exception {
    		ZoneTransferIn xfr = ZoneTransferIn.newAXFR(new Name("test.com."), "192.168.36.54", null);
    		List records = xfr.run();
    		Message response = new Message();
    		response.getHeader().setFlag(Flags.AA);
    		response.getHeader().setFlag(Flags.QR);
    		// response.addRecord(query.getQuestion(),Section.QUESTION);
    		Iterator it = records.iterator();
    		while (it.hasNext()) {
    			response.addRecord((Record) it.next(), Section.ANSWER);
    		}
    		System.out.println(response);
    	}
    
    	static void addRR() throws Exception {
    		Name zone = Name.fromString("test.com.");
    		Name host = Name.fromString("host", zone);
    		Update update = new Update(zone, DClass.IN);
    		Record record = new ARecord(host, DClass.IN, 3600, InetAddress.getByName("192.0.0.2"));
    		update.add(record);
    		Resolver resolver = new SimpleResolver("192.168.36.54");
    		resolver.setPort(53);
    		TSIG tsig = new TSIG("test_key", "epYaIl5VMJGRSG4WMeFW5g==");
    		resolver.setTSIGKey(tsig);
    		resolver.setTCP(true);
    		Message response = resolver.send(update);
    		System.out.println(response);
    	}
    }

检查添加结果：

$ dig @192.168.36.54 host.test.com
    
    ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6 <<>> @192.168.36.54 host.test.com
    ; (1 server found)
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19149
    ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1
    
    ;; QUESTION SECTION:
    ;host.test.com.                 IN      A
    
    ;; ANSWER SECTION:
    host.test.com.          3600    IN      A       192.0.0.2
    host.test.com.          3600    IN      A       192.0.0.1
    
    ;; AUTHORITY SECTION:
    test.com.               86400   IN      NS      dns.test.com.
    
    ;; ADDITIONAL SECTION:
    dns.test.com.           86400   IN      A       192.168.36.189
    
    ;; Query time: 2 msec
    ;; SERVER: 192.168.36.54#53(192.168.36.54)
    ;; WHEN: Sun Apr 19 00:22:41 2015
    ;; MSG SIZE  rcvd: 97

[dns4j]: http://sourceforge.net/projects/dnsjava/
[dnsjnio]: http://sourceforge.net/projects/dnsjnio
[jdnss]: http://sourceforge.net/projects/jdnss
[eagledns]: http://www.unlogic.se/projects/eagledns
[http_www.dnsjava.org]: http://www.dnsjava.org/