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[] { "dig", "+short", "NS", domain });
  15                         BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
  16                         String line;
  17                         LinkedList<String> nameservers = new LinkedList<String>();
  18                         while ((line = br.readLine()) != null) {
  19                                 nameservers.add(line);
  20                         }
  21                         p.destroy();
  22                         StringBuffer result = new StringBuffer();
  23                         result.append("failed: ");
  24                         boolean failed = nameservers.isEmpty();
  25                         nameservers: for (String NS : nameservers) {
  26                                 String[] call = new String[] { "dig", "+short", "TXT", "cacert." + domain, NS };
  27                                 System.out.println(Arrays.toString(call));
  28                                 p = Runtime.getRuntime().exec(call);
  29                                 br = new BufferedReader(new InputStreamReader(p.getInputStream()));
  30                                 String token = null;
  31                                 boolean found = false;
  32                                 while ((line = br.readLine()) != null) {
  33                                         if (line.isEmpty()) {
  34                                                 continue;
  35                                         }
  36                                         found = true;
  37                                         token = line.substring(1, line.length() - 1);
  38                                         if (token.equals(expToken)) {
  39                                                 continue nameservers;
  40                                         }
  41                                 }
  42                                 p.destroy();
  43                                 result.append(NS);
  44                                 if (found) {
  45                                         result.append(" DIFFER;");
  46                                 } else {
  47                                         result.append(" EMPTY;");
  48                                 }
  49                                 failed = true;
  50
  51                         }
  52                         if (!failed) {
  53                                 // Success
  54                                 return;
  55                         }
  56                         System.out.println(result.toString());
  57                 } catch (IOException e) {
  58                         e.printStackTrace();
  59                         // FAIL
  60                 }
  61                 // FAIL
  62         }
  63
  64 }