dnsjava-users

DNSJAVA Help

[Sreenivasa M. <mul...@ho...>]

Hello Guys,

I am having trouble in adding a row to DNS which is BIND 9.2.5.

I am able to ping the server.

When I run the program which is below. Nothing goes on to wire atleast. The 
code is not contacting the server for update or add.

Could you please advice me on what could be wrong.

Thanks & Regards
Sri

		System.setProperty("sun.net.spi.nameservice.nameservers","192.168.2.3");
		System.setProperty("sun.net.spi.nameservice.provider.1", "dns,sun");
		System.setProperty("sun.net.spi.nameservice.provider.2", "dns,dnsjava");



    public Record addDNSEntry(String zone, int dnsClass, long ttl, String 
ipAddress ){
    	String = "ool-18bbc301.arpa.net."

    	Message msg = new Message();
    	Record record = null;

    	try{
    		System.out.println("Trying to update the record");

    		byte[] ipaddressbytearray = Address.toByteArray("195.187.24.1", 
Address.IPv4);


    		record = Record.newRecord(new Name(zone), Type.A, DClass.IN, ttl, 
ipaddressbytearray.length, ipaddressbytearray);

    		msg.addRecord(record,Section.ADDITIONAL);
    		log.info("The Entry is updated");
    	}catch(TextParseException tpe){
    		log.error(" OOOPs In TextParseException of add DNS entry : ");
    		log.error(tpe.getMessage());
    	}catch(Exception ioe){
    		log.error("OOPS In Exception of add DNS entry : ");
    		log.error(ioe.getMessage());
    	}
    	return record;
    }

Re: DNSJAVA Help

[Brian W. <bwe...@xb...>]

On Thu, 26 Oct 2006, Sreenivasa Mulakala wrote:

> I am having trouble in adding a row to DNS which is BIND 9.2.5.
>
> I am able to ping the server.
>
> When I run the program which is below. Nothing goes on to wire atleast. The
> code is not contacting the server for update or add.
>
> Could you please advice me on what could be wrong.
>
> Thanks & Regards
> Sri
>
> 		System.setProperty("sun.net.spi.nameservice.nameservers","192.168.2.3");
> 		System.setProperty("sun.net.spi.nameservice.provider.1", "dns,sun");
> 		System.setProperty("sun.net.spi.nameservice.provider.2", "dns,dnsjava");
>
>
>
>    public Record addDNSEntry(String zone, int dnsClass, long ttl, String
> ipAddress ){
>    	String = "ool-18bbc301.arpa.net."
>
>    	Message msg = new Message();
>    	Record record = null;
>
>    	try{
>    		System.out.println("Trying to update the record");
>
>    		byte[] ipaddressbytearray = Address.toByteArray("195.187.24.1",
> Address.IPv4);
>
>
>    		record = Record.newRecord(new Name(zone), Type.A, DClass.IN, ttl,
> ipaddressbytearray.length, ipaddressbytearray);
>
>    		msg.addRecord(record,Section.ADDITIONAL);
>    		log.info("The Entry is updated");
>    	}catch(TextParseException tpe){
>    		log.error(" OOOPs In TextParseException of add DNS entry : ");
>    		log.error(tpe.getMessage());
>    	}catch(Exception ioe){
>    		log.error("OOPS In Exception of add DNS entry : ");
>    		log.error(ioe.getMessage());
>    	}
>    	return record;
>    }

You're building a message and never sending it.  See the example of using 
dynamic update at http://www.dnsjava.org/examples.html.

Brian

Re: DNSJAVA Help

[Sreenivasa M. <mul...@ho...>]

Hello Brain,

Here is the entry

The SOA is
195.187.24.in-addr.arpa IN SOA  lab-a.lab.test.net. abuse.test.net. (
                                2006101700 ; serial
                                7200       ; refresh (2 hours)
                                600        ; retry (10 minutes)
                                604800     ; expire (1 week)
                                86400      ; minimum (1 day)
                                )

Here are some sample entries

1                       PTR     ool-18bbc301.static.goog.net.
10                      PTR     ool-18bbc30a.static.goog.net.
100                     PTR     ool-18bbc364.static.goog.net.
101                     PTR     ool-18bbc365.static.goog.net.
102                     PTR     ool-18bbc366.static.goog.net.

Could you please tell me what I should be doing wrong.

For me record is not getting created in the first place. It is returning 
null.

When I try to debug there is a exception like

wireparseexception below

Here is the data I am passing

[-61, -69, -61, 1]  in byte array.

public
Name(DNSInput in) throws WireParseException {
	int len, pos, currentpos;
	Name name2;
	boolean done = false;
	byte [] label = new byte[MAXLABEL + 1];
	boolean savedState = false;

	while (!done) {
		len = in.readU8();
		switch (len & LABEL_MASK) {
		case LABEL_NORMAL:
			if (getlabels() >= MAXLABELS)
				throw new WireParseException("too many labels");
			if (len == 0) {
				append(emptyLabel, 0, 1);
				done = true;
			} else {
				label[0] = (byte)len;
				in.readByteArray(label, 1, len);
				append(label, 0, 1);
			}
			break;
		case LABEL_COMPRESSION:
			pos = in.readU8();
			pos += ((len & ~LABEL_MASK) << 8);
			if (Options.check("verbosecompression"))
				System.err.println("currently " + in.current() +
						   ", pointer to " + pos);

			if (pos >= in.current())
				throw new WireParseException("bad compression");

When I do a nsupdate and works for these

1.195.187.24.in-addr.arpa 600 IN PTR www.junk.com.

Thanks in advance

-Sri

>From: Brian Wellington <bwe...@xb...>
>To: Sreenivasa Mulakala <mul...@ho...>
>CC: dns...@li...
>Subject: Re: DNSJAVA Help
>Date: Thu, 26 Oct 2006 11:01:45 -0700 (PDT)
>
>On Thu, 26 Oct 2006, Sreenivasa Mulakala wrote:
>
>>I am having trouble in adding a row to DNS which is BIND 9.2.5.
>>
>>I am able to ping the server.
>>
>>When I run the program which is below. Nothing goes on to wire atleast. 
>>The
>>code is not contacting the server for update or add.
>>
>>Could you please advice me on what could be wrong.
>>
>>Thanks & Regards
>>Sri
>>
>>		System.setProperty("sun.net.spi.nameservice.nameservers","192.168.2.3");
>>		System.setProperty("sun.net.spi.nameservice.provider.1", "dns,sun");
>>		System.setProperty("sun.net.spi.nameservice.provider.2", "dns,dnsjava");
>>
>>
>>
>>    public Record addDNSEntry(String zone, int dnsClass, long ttl, String
>>ipAddress ){
>>    	String = "ool-18bbc301.arpa.net."
>>
>>    	Message msg = new Message();
>>    	Record record = null;
>>
>>    	try{
>>    		System.out.println("Trying to update the record");
>>
>>    		byte[] ipaddressbytearray = Address.toByteArray("195.187.24.1",
>>Address.IPv4);
>>
>>
>>    		record = Record.newRecord(new Name(zone), Type.A, DClass.IN, ttl,
>>ipaddressbytearray.length, ipaddressbytearray);
>>
>>    		msg.addRecord(record,Section.ADDITIONAL);
>>    		log.info("The Entry is updated");
>>    	}catch(TextParseException tpe){
>>    		log.error(" OOOPs In TextParseException of add DNS entry : ");
>>    		log.error(tpe.getMessage());
>>    	}catch(Exception ioe){
>>    		log.error("OOPS In Exception of add DNS entry : ");
>>    		log.error(ioe.getMessage());
>>    	}
>>    	return record;
>>    }
>
>You're building a message and never sending it.  See the example of using 
>dynamic update at http://www.dnsjava.org/examples.html.
>
>Brian

Re: DNSJAVA Help

[Brian W. <bwe...@xb...>]

I'm sorry, but I'm not going to help you if you persist in not reading the 
example code.  There's absolutely no reason for you to be constructing 
byte arrays manually to create DNS records when there are perfectly good 
methods to create records from either Strings or native objects.

Brian

Re: DNSJAVA Help

[Sreenivasa M. <mul...@ho...>]

Brian,

I am sorry to hear this.

Actually I am able to add the entry. I did read your examples. I grabbed the 
code from there only.

Here is the code I am using

    		Name zoneName = Name.fromString(zone);
    		Name host = Name.fromString("www.junk.com", zoneName);
    		Update update = new Update(zoneName);
    		update.add(host, Type.PTR, 3600, ipAddress);

    		org.xbill.DNS.Resolver res = new SimpleResolver("10.240.2.21");
    		res.setTCP(true);

    		Message response = res.send(update);


Here are the results

Expected one
1                   PTR     v000f9fd9a094.vo.test.net.

Got like this

                        PTR     195.187.195.1


Thanks in advance

Regards
Sri
>From: Brian Wellington <bwe...@xb...>
>To: Sreenivasa Mulakala <mul...@ho...>
>CC: dns...@li...
>Subject: Re: DNSJAVA Help
>Date: Thu, 26 Oct 2006 12:29:51 -0700 (PDT)
>
>I'm sorry, but I'm not going to help you if you persist in not reading the 
>example code.  There's absolutely no reason for you to be constructing byte 
>arrays manually to create DNS records when there are perfectly good methods 
>to create records from either Strings or native objects.
>
>Brian

Re: DNSJAVA Help

[<og...@og...>]

At 15:51 26/10/2006, Sreenivasa Mulakala wrote:
>Brian,
>
>I am sorry to hear this.
>
>Actually I am able to add the entry. I did read your examples. I grabbed the
>code from there only.
>
>Here is the code I am using
>
>                 Name zoneName = Name.fromString(zone);
>                 Name host = Name.fromString("www.junk.com", zoneName);
>                 Update update = new Update(zoneName);
>                 update.add(host, Type.PTR, 3600, ipAddress);

                                                  ^^^^^^^^^^^^
Fourth parameter (RDATA) specifies an address you need to change this
to the name you want.

         Olafur