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

   1 package org.cacert.gigi.ping;
   2
   3 import java.util.Arrays;
   4 import java.util.List;
   5
   6 import javax.naming.NamingException;
   7
   8 import org.cacert.gigi.Domain;
   9 import org.cacert.gigi.User;
  10 import org.cacert.gigi.util.DNSUtil;
  11
  12 public class DNSPinger extends DomainPinger {
  13
  14     @Override
  15     public String ping(Domain domain, String expToken, User u) {
  16         String[] tokenParts = expToken.split(":", 2);
  17         List<String> nameservers;
  18         try {
  19             nameservers = Arrays.asList(DNSUtil.getNSNames(domain.getSuffix()));
  20         } catch (NamingException e) {
  21             return "No authorative nameserver found.";
  22         }
  23         StringBuffer result = new StringBuffer();
  24         result.append("failed: ");
  25         boolean failed = nameservers.isEmpty();
  26         nameservers:
  27         for (String NS : nameservers) {
  28             boolean found = false;
  29             try {
  30                 for (String token : DNSUtil.getTXTEntries("cacert-" + tokenParts[0] + "." + domain.getSuffix(), NS)) {
  31                     if (token.isEmpty()) {
  32                         continue;
  33                     }
  34                     found = true;
  35                     if (token.equals(tokenParts[1])) {
  36                         continue nameservers;
  37                     }
  38                 }
  39             } catch (NamingException e) {
  40                 found = false;
  41             }
  42             result.append(NS);
  43             if (found) {
  44                 result.append(" DIFFER;");
  45             } else {
  46                 result.append(" EMPTY;");
  47             }
  48             failed = true;
  49
  50         }
  51         if ( !failed) {
  52             return PING_SUCCEDED;
  53         }
  54         return result.toString();
  55     }
  56 }