DNSBrowse.java
back to DNS queries in Java
01 //
02 // DNSBrowse.java
03 //
04 // Simple test-bed for my DNSQuery class.
05 //
06 // Copyright 1997 W. Scott Means (http://smeans.com)
07 //
08 // Licensed under the Apache License, Version 2.0 (the "License");
09 // you may not use this file except in compliance with the License.
10 // You may obtain a copy of the License at
11 //
12 // http://www.apache.org/licenses/LICENSE-2.0
13 //
14 // Unless required by applicable law or agreed to in writing, software
15 // distributed under the License is distributed on an "AS IS" BASIS,
16 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 // See the License for the specific language governing permissions and
18 // limitations under the License.
19 //
20
21 import java.io.*;
22 import java.net.*;
23
24 public class DNSBrowse
25 {
26 public static void TestDNS(String strFQDN) {
27 DNSQuery dnsQ = new DNSQuery();
28
29 dnsQ.SetQuery(dnsQ.TYPE_ANY, dnsQ.CLASS_INTERNET, strFQDN);
30
31 if (DNSService.PerformDNSQuery(dnsQ)) {
32 for (int i = 0; i < dnsQ.m_arrAns.length; i++) {
33 dnsQ.m_arrAns[i].dumpRecord(System.out);
34 System.out.println("");
35 }
36 }
37 }
38
39 public static void main(String args[]) {
40 if (args.length < 1) {
41 System.err.println("usage: DNSBrowse ns1.somehost.com [ns2.somehost.com] < domainlist.txt");
42 return;
43 }
44
45 InetAddress iaPrimary;
46 InetAddress iaSecondary;
47
48 try {
49 iaPrimary = InetAddress.getByName(args[0]);
50
51 iaSecondary = args.length > 1 ? InetAddress.getByName(args[1]) : iaPrimary;
52 } catch (UnknownHostException uhe) {
53 System.err.println("exception: unable to resolve host: " + uhe.getMessage());
54
55 return;
56 }
57
58 System.out.println("Primary: " + iaPrimary.toString());
59 System.out.println("Secondary: " + iaSecondary.toString());
60
61 int iChar;
62 String str;
63 DataInputStream dis = new DataInputStream(System.in);
64
65 DNSService.SetDNSAddress(iaPrimary, iaSecondary);
66
67 try {
68 while ((str = dis.readLine()) != null && str.length() > 0) {
69 TestDNS(str);
70 }
71 } catch (IOException ioe) {
72 System.out.println("exception: " + ioe.getMessage());
73 }
74 }
75 }
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