Esempio n. 1
0
 /**
  * Creates a Zone by performing a zone transfer to the specified host. All records that do not
  * belong in the Zone are added to the specified Cache.
  *
  * @see Cache
  * @see Master
  */
 public Zone(Name zone, short dclass, String remote, Cache cache) throws IOException {
   super(false);
   origin = zone;
   this.dclass = dclass;
   type = SECONDARY;
   Resolver res = new SimpleResolver(remote);
   Record rec = Record.newRecord(zone, Type.AXFR, dclass);
   Message query = Message.newQuery(rec);
   Message response = res.send(query);
   Record[] recs = response.getSectionArray(Section.ANSWER);
   for (int i = 0; i < recs.length; i++) {
     if (!recs[i].getName().subdomain(origin)) {
       if (Options.check("verbose"))
         System.err.println(recs[i].getName() + "is not in zone " + origin);
       continue;
     }
     addRecord(recs[i]);
   }
   if (cache != null) {
     recs = response.getSectionArray(Section.ADDITIONAL);
     for (int i = 0; i < recs.length; i++) cache.addRecord(recs[i], Credibility.GLUE, recs);
   }
   validate();
 }
Esempio n. 2
0
  public static Record[] getRecords(String namestr, short type, short dclass, byte cred) {
    Message query;
    Message response;
    Record question;
    Record[] answers;
    int answerCount = 0, i = 0;
    Enumeration e;
    Name name = new Name(namestr);

    /*System.out.println("lookup of " + name + " " + Type.string(type));*/
    if (!Type.isRR(type) && type != Type.ANY) return null;

    if (res == null) {
      try {
        eres = new ExtendedResolver();
      } catch (UnknownHostException uhe) {
        System.out.println("Failed to initialize resolver");
        System.exit(-1);
      }
    }
    if (cache == null) cache = new Cache();

    CacheResponse cached = cache.lookupRecords(name, type, dclass, cred);
    /*System.out.println(cached);*/
    if (cached.isSuccessful()) {
      RRset rrset = cached.answer();
      answerCount = rrset.size();
      e = rrset.rrs();
    } else if (cached.isNegative()) {
      answerCount = 0;
      e = null;
    } else {
      question = Record.newRecord(name, type, dclass);
      query = Message.newQuery(question);

      if (res != null) response = res.send(query);
      else response = eres.send(query);

      short rcode = response.getHeader().getRcode();
      if (rcode == Rcode.NOERROR || rcode == Rcode.NXDOMAIN) cache.addMessage(response);

      if (rcode != Rcode.NOERROR) return null;

      e = response.getSection(Section.ANSWER);
      while (e.hasMoreElements()) {
        Record r = (Record) e.nextElement();
        if (matchType(r.getType(), type)) answerCount++;
      }

      e = response.getSection(Section.ANSWER);
    }

    if (answerCount == 0) return null;

    answers = new Record[answerCount];

    while (e.hasMoreElements()) {
      Record r = (Record) e.nextElement();
      if (matchType(r.getType(), type)) answers[i++] = r;
    }

    return answers;
  }