src/org/cacert/gigi/ping/DNSPinger.java

   1 package org.cacert.gigi.ping;
   2
   3 import java.io.BufferedReader;
   4 import java.io.IOException;
   5 import java.io.InputStreamReader;
   6 import java.util.Arrays;
   7 import java.util.LinkedList;
   8
   9 public class DNSPinger extends DomainPinger {
  10
  11     @Override
  12     public void ping(String domain, String configuration, String expToken) {
  13         try {
  14             Process p = Runtime.getRuntime().exec(new String[] {
  15                     "dig", "+short", "NS", domain
  16             });
  17             BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
  18             String line;
  19             LinkedList<String> nameservers = new LinkedList<String>();
  20             while ((line = br.readLine()) != null) {
  21                 nameservers.add(line);
  22             }
  23             p.destroy();
  24             StringBuffer result = new StringBuffer();
  25             result.append("failed: ");
  26             boolean failed = nameservers.isEmpty();
  27             nameservers:
  28             for (String NS : nameservers) {
  29                 String[] call = new String[] {
  30                         "dig", "+short", "TXT", "cacert." + domain, NS
  31                 };
  32                 System.out.println(Arrays.toString(call));
  33                 p = Runtime.getRuntime().exec(call);
  34                 br = new BufferedReader(new InputStreamReader(p.getInputStream()));
  35                 String token = null;
  36                 boolean found = false;
  37                 while ((line = br.readLine()) != null) {
  38                     if (line.isEmpty()) {
  39                         continue;
  40                     }
  41                     found = true;
  42                     token = line.substring(1, line.length() - 1);
  43                     if (token.equals(expToken)) {
  44                         continue nameservers;
  45                     }
  46                 }
  47                 p.destroy();
  48                 result.append(NS);
  49                 if (found) {
  50                     result.append(" DIFFER;");
  51                 } else {
  52                     result.append(" EMPTY;");
  53                 }
  54                 failed = true;
  55
  56             }
  57             if ( !failed) {
  58                 // Success
  59                 return;
  60             }
  61             System.out.println(result.toString());
  62         } catch (IOException e) {
  63             e.printStackTrace();
  64             // FAIL
  65         }
  66         // FAIL
  67     }
  68
  69 }