예제 #1
1
  public Message send(Message query) {
    int q, r;
    Message best = null;
    byte rcode;

    for (q = 0; q < 20; q++) {
      boolean ok = false;
      for (r = 0; r < resolvers.length; r++) ok |= sendTo(query, r, q);
      if (!ok) break;
      Message m = null;
      synchronized (queue) {
        try {
          queue.wait((quantum + 1) * 1000);
        } catch (InterruptedException e) {
          System.out.println("interrupted");
        }
        if (queue.size() == 0) continue;
        m = (Message) queue.firstElement();
        queue.removeElementAt(0);
        Integer I = (Integer) queue.firstElement();
        queue.removeElementAt(0);
        r = I.intValue();
      }
      if (m == null) invalid[r] = true;
      else {
        rcode = m.getHeader().getRcode();
        if (rcode == Rcode.NOERROR) return m;
        else {
          if (best == null) best = m;
          invalid[r] = true;
        }
      }
    }
    return best;
  }
예제 #2
0
 protected String printMessageList(List<Message> list) {
   StringBuilder sb = new StringBuilder();
   int size = list.size();
   Message first = size > 0 ? list.get(0) : null, second = size > 1 ? list.get(size - 1) : first;
   UnicastHeader hdr;
   if (first != null) {
     hdr = (UnicastHeader) first.getHeader(id);
     if (hdr != null) sb.append("#" + hdr.seqno);
   }
   if (second != null) {
     hdr = (UnicastHeader) second.getHeader(id);
     if (hdr != null) sb.append(" - #" + hdr.seqno);
   }
   return sb.toString();
 }
 // ------------------------------------------------------------
 private void distributeExternal(Message mess) {
   Address target = mess.getHeader().getDestinationAddress();
   if (matchesExternal(target)) {
     log("Send to external MBus too\n\n");
     layer.send(mess);
   }
 }
예제 #4
0
  /**
   * We need to resend our first message with our conn_id
   *
   * @param sender
   * @param seqno Resend the non null messages in the range [lowest .. seqno]
   */
  protected void handleResendingOfFirstMessage(Address sender, long seqno) {
    if (log.isTraceEnabled())
      log.trace(local_addr + " <-- SEND_FIRST_SEQNO(" + sender + "," + seqno + ")");
    SenderEntry entry = send_table.get(sender);
    Table<Message> win = entry != null ? entry.sent_msgs : null;
    if (win == null) {
      if (log.isErrorEnabled())
        log.error(local_addr + ": sender window for " + sender + " not found");
      return;
    }

    boolean first_sent = false;
    for (long i = win.getLow() + 1; i <= seqno; i++) {
      Message rsp = win.get(i);
      if (rsp == null) continue;
      if (first_sent) {
        down_prot.down(new Event(Event.MSG, rsp));
      } else {
        first_sent = true;
        // We need to copy the UnicastHeader and put it back into the message because Message.copy()
        // doesn't copy
        // the headers and therefore we'd modify the original message in the sender retransmission
        // window
        // (https://jira.jboss.org/jira/browse/JGRP-965)
        Message copy = rsp.copy();
        Unicast2Header hdr = (Unicast2Header) copy.getHeader(this.id);
        Unicast2Header newhdr = hdr.copy();
        newhdr.first = true;
        copy.putHeader(this.id, newhdr);
        down_prot.down(new Event(Event.MSG, copy));
      }
    }
  }
예제 #5
0
  public void up(MessageBatch batch) {
    if (batch.dest() == null) { // not a unicast batch
      up_prot.up(batch);
      return;
    }

    int size = batch.size();
    Map<Short, List<Message>> msgs =
        new TreeMap<Short, List<Message>>(); // map of messages, keyed by conn-id
    for (Message msg : batch) {
      if (msg == null || msg.isFlagSet(Message.Flag.NO_RELIABILITY)) continue;
      UnicastHeader hdr = (UnicastHeader) msg.getHeader(id);
      if (hdr == null) continue;
      batch.remove(msg); // remove the message from the batch, so it won't be passed up the stack

      if (hdr.type != UnicastHeader.DATA) {
        try {
          handleUpEvent(msg.getSrc(), hdr);
        } catch (Throwable t) { // we cannot let an exception terminate the processing of this batch
          log.error(local_addr + ": failed handling event", t);
        }
        continue;
      }

      List<Message> list = msgs.get(hdr.conn_id);
      if (list == null) msgs.put(hdr.conn_id, list = new ArrayList<Message>(size));
      list.add(msg);
    }

    if (!msgs.isEmpty()) handleBatchReceived(batch.sender(), msgs); // process msgs:
    if (!batch.isEmpty()) up_prot.up(batch);
  }
예제 #6
0
파일: Locking.java 프로젝트: an1310/JGroups
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        LockingHeader hdr = (LockingHeader) msg.getHeader(id);
        if (hdr == null) break;

        Request req = (Request) msg.getObject();
        if (log.isTraceEnabled())
          log.trace("[" + local_addr + "] <-- [" + msg.getSrc() + "] " + req);
        switch (req.type) {
          case GRANT_LOCK:
          case RELEASE_LOCK:
            handleLockRequest(req);
            break;
          case LOCK_GRANTED:
            handleLockGrantedResponse(req.lock_name, req.owner, msg.getSrc());
            break;
          case LOCK_DENIED:
            handleLockDeniedResponse(req.lock_name, req.owner);
            break;
          case CREATE_LOCK:
            handleCreateLockRequest(req.lock_name, req.owner);
            break;
          case DELETE_LOCK:
            handleDeleteLockRequest(req.lock_name);
            break;
          case COND_SIG:
          case COND_SIG_ALL:
            handleSignalRequest(req);
            break;
          case LOCK_AWAIT:
            handleAwaitRequest(req.lock_name, req.owner);
            handleLockRequest(req);
            break;
          case DELETE_LOCK_AWAIT:
            handleDeleteAwaitRequest(req.lock_name, req.owner);
            break;
          case SIG_RET:
            handleSignalResponse(req.lock_name, req.owner);
            break;
          case CREATE_AWAITER:
            handleCreateAwaitingRequest(req.lock_name, req.owner);
            break;
          case DELETE_AWAITER:
            handleDeleteAwaitingRequest(req.lock_name, req.owner);
            break;
          default:
            log.error("Request of type " + req.type + " not known");
            break;
        }
        return null;

      case Event.VIEW_CHANGE:
        handleView((View) evt.getArg());
        break;
    }
    return up_prot.up(evt);
  }
  // ------------------------------------------------------------
  public int send(Message mess) {
    //  	log(".send: "+mess);
    int seqNum = mess.getHeader().getSequenceNumber();

    distributeInternal(mess);
    distributeExternal(mess);
    return seqNum;
  }
예제 #8
0
 /** Called by AckSenderWindow to resend messages for which no ACK has been received yet */
 public void retransmit(Message msg) {
   if (log.isTraceEnabled()) {
     UnicastHeader hdr = (UnicastHeader) msg.getHeader(id);
     long seqno = hdr != null ? hdr.seqno : -1;
     log.trace(local_addr + " --> XMIT(" + msg.getDest() + ": #" + seqno + ')');
   }
   down_prot.down(new Event(Event.MSG, msg));
   num_xmits++;
 }
예제 #9
0
  /**
   * Try to remove as many messages as possible from the table as pass them up. Prevents concurrent
   * passing up of messages by different threads (http://jira.jboss.com/jira/browse/JGRP-198); lots
   * of threads can come up to this point concurrently, but only 1 is allowed to pass at a time. We
   * *can* deliver messages from *different* senders concurrently, e.g. reception of P1, Q1, P2, Q2
   * can result in delivery of P1, Q1, Q2, P2: FIFO (implemented by UNICAST) says messages need to
   * be delivered in the order in which they were sent
   */
  protected int removeAndDeliver(
      final AtomicBoolean processing, Table<Message> win, Address sender) {
    int retval = 0;
    boolean released_processing = false;
    try {
      while (true) {
        List<Message> list = win.removeMany(processing, true, max_msg_batch_size);
        if (list == null) {
          released_processing = true;
          return retval;
        }

        MessageBatch batch = new MessageBatch(local_addr, sender, null, false, list);
        for (Message msg_to_deliver : batch) {
          // discard OOB msg: it has already been delivered
          // (http://jira.jboss.com/jira/browse/JGRP-377)
          if (msg_to_deliver.isFlagSet(Message.Flag.OOB)) batch.remove(msg_to_deliver);
        }

        try {
          if (log.isTraceEnabled()) {
            Message first = batch.first(), last = batch.last();
            StringBuilder sb = new StringBuilder(local_addr + ": delivering");
            if (first != null && last != null) {
              UnicastHeader hdr1 = (UnicastHeader) first.getHeader(id),
                  hdr2 = (UnicastHeader) last.getHeader(id);
              sb.append(" #").append(hdr1.seqno).append(" - #").append(hdr2.seqno);
            }
            sb.append(" (" + batch.size()).append(" messages)");
            log.trace(sb);
          }
          up_prot.up(batch);
        } catch (Throwable t) {
          log.error("failed to deliver batch " + batch, t);
        }
      }
    } finally {
      // processing is always set in win.remove(processing) above and never here ! This code is just
      // a
      // 2nd line of defense should there be an exception before win.remove(processing) sets
      // processing
      if (!released_processing) processing.set(false);
    }
  }
예제 #10
0
 private Message sendAXFR(Message query) throws IOException {
   Name qname = query.getQuestion().getName();
   ZoneTransferIn xfrin = ZoneTransferIn.newAXFR(qname, address, tsig);
   xfrin.setTimeout((int) (getTimeout() / 1000));
   xfrin.setLocalAddress(localAddress);
   try {
     xfrin.run();
   } catch (ZoneTransferException e) {
     throw new WireParseException(e.getMessage());
   }
   List records = xfrin.getAXFR();
   Message response = new Message(query.getHeader().getID());
   response.getHeader().setFlag(Flags.AA);
   response.getHeader().setFlag(Flags.QR);
   response.addRecord(query.getQuestion(), Section.QUESTION);
   Iterator it = records.iterator();
   while (it.hasNext()) response.addRecord((Record) it.next(), Section.ANSWER);
   return response;
 }
  public static void dumpEnvelope(Message m) throws Exception {
    pr("This is the message envelope");
    pr("---------------------------");
    Address[] a;
    // FROM
    if ((a = m.getFrom()) != null) {
      for (int j = 0; j < a.length; j++) pr("FROM: " + a[j].toString());
    }

    // TO
    if ((a = m.getRecipients(Message.RecipientType.TO)) != null) {
      for (int j = 0; j < a.length; j++) pr("TO: " + a[j].toString());
    }

    // SUBJECT
    pr("SUBJECT: " + m.getSubject());

    // DATE
    Date d = m.getSentDate();
    pr("SendDate: " + (d != null ? d.toString() : "UNKNOWN"));

    // FLAGS
    Flags flags = m.getFlags();
    StringBuffer sb = new StringBuffer();
    Flags.Flag[] sf = flags.getSystemFlags(); // get the system flags

    boolean first = true;
    for (int i = 0; i < sf.length; i++) {
      String s;
      Flags.Flag f = sf[i];
      if (f == Flags.Flag.ANSWERED) s = "\\Answered";
      else if (f == Flags.Flag.DELETED) s = "\\Deleted";
      else if (f == Flags.Flag.DRAFT) s = "\\Draft";
      else if (f == Flags.Flag.FLAGGED) s = "\\Flagged";
      else if (f == Flags.Flag.RECENT) s = "\\Recent";
      else if (f == Flags.Flag.SEEN) s = "\\Seen";
      else continue; // skip it
      if (first) first = false;
      else sb.append(' ');
      sb.append(s);
    }

    String[] uf = flags.getUserFlags(); // get the user flag strings
    for (int i = 0; i < uf.length; i++) {
      if (first) first = false;
      else sb.append(' ');
      sb.append(uf[i]);
    }
    pr("FLAGS: " + sb.toString());

    // X-MAILER
    String[] hdrs = m.getHeader("X-Mailer");
    if (hdrs != null) pr("X-Mailer: " + hdrs[0]);
    else pr("X-Mailer NOT available");
  }
  private void writeAll() {
    List<MessageBean> beans = messageTable.getBeans();
    HashMap<Integer, Message> map = new HashMap<Integer, Message>(2 * beans.size());

    for (MessageBean mb : beans) {
      map.put(mb.m.hashCode(), mb.m);
    }

    if (fileChooser == null)
      fileChooser = new FileManager(null, null, null, (PreferencesExt) prefs.node("FileManager"));

    String defloc = (raf.getLocation() == null) ? "." : raf.getLocation();
    String dirName = fileChooser.chooseDirectory(defloc);
    if (dirName == null) return;

    try {
      int count = 0;
      for (Message m : map.values()) {
        String header = m.getHeader();
        if (header != null) {
          header = header.split(" ")[0];
        } else {
          header = Integer.toString(Math.abs(m.hashCode()));
        }

        File file = new File(dirName + "/" + header + ".bufr");
        FileOutputStream fos = new FileOutputStream(file);
        WritableByteChannel wbc = fos.getChannel();
        wbc.write(ByteBuffer.wrap(m.getHeader().getBytes()));
        byte[] raw = scan.getMessageBytes(m);
        wbc.write(ByteBuffer.wrap(raw));
        wbc.close();
        count++;
      }
      JOptionPane.showMessageDialog(
          BufrMessageViewer.this, count + " successfully written to " + dirName);

    } catch (IOException e1) {
      JOptionPane.showMessageDialog(BufrMessageViewer.this, e1.getMessage());
      e1.printStackTrace();
    }
  }
예제 #13
0
  protected void handleBatchReceived(Address sender, Map<Short, List<Message>> map) {
    for (Map.Entry<Short, List<Message>> element : map.entrySet()) {
      final List<Message> msg_list = element.getValue();
      if (log.isTraceEnabled()) {
        StringBuilder sb = new StringBuilder();
        sb.append(local_addr)
            .append(" <-- DATA(")
            .append(sender)
            .append(": " + printMessageList(msg_list))
            .append(')');
        log.trace(sb);
      }

      short conn_id = element.getKey();
      ReceiverEntry entry = null;
      for (Message msg : msg_list) {
        UnicastHeader hdr = (UnicastHeader) msg.getHeader(id);
        entry = getReceiverEntry(sender, hdr.seqno, hdr.first, conn_id);
        if (entry == null) continue;
        Table<Message> win = entry.received_msgs;
        boolean msg_added =
            win.add(hdr.seqno, msg); // win is guaranteed to be non-null if we get here
        num_msgs_received++;

        if (hdr.first && msg_added)
          sendAck(
              sender, hdr.seqno,
              conn_id); // send an ack immediately when we received the first message of a conn

        // An OOB message is passed up immediately. Later, when remove() is called, we discard it.
        // This affects ordering !
        // http://jira.jboss.com/jira/browse/JGRP-377
        if (msg.isFlagSet(Message.Flag.OOB) && msg_added) {
          try {
            up_prot.up(new Event(Event.MSG, msg));
          } catch (Throwable t) {
            log.error("couldn't deliver OOB message " + msg, t);
          }
        }
      }
      if (entry != null && conn_expiry_timeout > 0) entry.update();
    }

    ReceiverEntry entry = recv_table.get(sender);
    Table<Message> win = entry != null ? entry.received_msgs : null;
    if (win != null) {
      final AtomicBoolean processing = win.getProcessing();
      if (processing.compareAndSet(false, true)) {
        removeAndDeliver(processing, win, sender);
        sendAck(sender, win.getHighestDeliverable(), entry.recv_conn_id);
      }
    }
  }
 // ------------------------------------------------------------
 private void distributeInternal(Message mess) {
   // Find out the virtual receipents
   Address target = mess.getHeader().getDestinationAddress();
   Address source = mess.getHeader().getSourceAddress();
   VirtualMBusListener[] virt = getMatchingTargets(target);
   // Deliver message to all virtual receipents
   for (int i = 0; i < virt.length; i++) {
     if (!virt[i].getAddress().equals(source)) {
       log(".distributeInternal to " + virt[i]);
       virt[i].incomingMessage(mess);
     }
   }
 }
예제 #15
0
파일: ENCRYPT.java 프로젝트: x97mdr/JGroups
  private Object handleUpMessage(Event evt) throws Exception {
    Message msg = (Message) evt.getArg();
    EncryptHeader hdr;
    if (msg == null
        || (msg.getLength() == 0 && !encrypt_entire_message)
        || ((hdr = (EncryptHeader) msg.getHeader(this.id)) == null)) return up_prot.up(evt);

    if (log.isTraceEnabled()) log.trace("header received %s", hdr);

    switch (hdr.getType()) {
      case EncryptHeader.ENCRYPT:
        return handleEncryptedMessage(msg, evt, hdr);
      default:
        handleUpEvent(msg, hdr);
        return null;
    }
  }
예제 #16
0
  /**
   * We need to resend our first message with our conn_id
   *
   * @param sender
   * @param seqno Resend messages in the range [lowest .. seqno]
   */
  private void handleResendingOfFirstMessage(Address sender, long seqno) {
    if (log.isTraceEnabled())
      log.trace(local_addr + " <-- SEND_FIRST_SEQNO(" + sender + "," + seqno + ")");
    SenderEntry entry = send_table.get(sender);
    AckSenderWindow win = entry != null ? entry.sent_msgs : null;
    if (win == null) {
      if (log.isErrorEnabled())
        log.error(local_addr + ": sender window for " + sender + " not found");
      return;
    }
    long lowest = win.getLowest();
    Message rsp = win.get(lowest);
    if (rsp == null) return;

    // We need to copy the UnicastHeader and put it back into the message because Message.copy()
    // doesn't copy
    // the headers and therefore we'd modify the original message in the sender retransmission
    // window
    // (https://jira.jboss.org/jira/browse/JGRP-965)
    Message copy = rsp.copy();
    Unicast2Header hdr = (Unicast2Header) copy.getHeader(this.id);
    Unicast2Header newhdr = hdr.copy();
    newhdr.first = true;
    copy.putHeader(this.id, newhdr);

    if (log.isTraceEnabled()) {
      StringBuilder sb = new StringBuilder();
      sb.append(local_addr)
          .append(" --> DATA(")
          .append(copy.getDest())
          .append(": #")
          .append(newhdr.seqno)
          .append(", conn_id=")
          .append(newhdr.conn_id);
      if (newhdr.first) sb.append(", first");
      sb.append(')');
      log.trace(sb);
    }
    down_prot.down(new Event(Event.MSG, copy));

    if (++lowest > seqno) return;
    for (long i = lowest; i <= seqno; i++) {
      rsp = win.get(i);
      if (rsp != null) down_prot.down(new Event(Event.MSG, rsp));
    }
  }
예제 #17
0
파일: ENCRYPT.java 프로젝트: x97mdr/JGroups
  /**
   * Does the actual work for decrypting - if version does not match current cipher then tries the
   * previous cipher
   */
  private Message decryptMessage(Cipher cipher, Message msg) throws Exception {
    EncryptHeader hdr = (EncryptHeader) msg.getHeader(this.id);
    if (!Arrays.equals(hdr.getVersion(), getSymVersion())) {
      log.warn(
          "attempting to use stored cipher as message does not use current encryption version ");
      cipher = keyMap.get(new AsciiString(hdr.getVersion()));
      if (cipher == null) {
        log.warn("unable to find a matching cipher in previous key map");
        return null;
      }
      log.trace("decrypting using previous cipher version");
      synchronized (cipher) {
        return _decrypt(cipher, msg, hdr.encryptEntireMessage());
      }
    }

    return _decrypt(cipher, msg, hdr.encryptEntireMessage());
  }
예제 #18
0
파일: ENCRYPT.java 프로젝트: x97mdr/JGroups
    public Message visit(Message msg, MessageBatch batch) {
      EncryptHeader hdr;

      if (msg == null
          || (msg.getLength() == 0 && !encrypt_entire_message)
          || ((hdr = (EncryptHeader) msg.getHeader(id)) == null)) return null;

      if (hdr.getType() == EncryptHeader.ENCRYPT) {
        // if queueing then pass into queue to be dealt with later
        if (queue_up) {
          queueUpMessage(msg, batch);
          return null;
        }

        // make sure we pass up any queued messages first
        if (!suppliedKey) drainUpQueue();

        if (lock == null) {
          int index = getNextIndex();
          lock = decoding_locks[index];
          cipher = decoding_ciphers[index];
          lock.lock();
        }

        try {
          Message tmpMsg = decryptMessage(cipher, msg.copy()); // need to copy for possible xmits
          if (tmpMsg != null) batch.replace(msg, tmpMsg);
        } catch (Exception e) {
          log.error(
              "failed decrypting message from %s (offset=%d, length=%d, buf.length=%d): %s, headers are %s",
              msg.getSrc(),
              msg.getOffset(),
              msg.getLength(),
              msg.getRawBuffer().length,
              e,
              msg.printHeaders());
        }
      } else {
        batch.remove(
            msg); // a control message will get handled by ENCRYPT and should not be passed up
        handleUpEvent(msg, hdr);
      }
      return null;
    }
예제 #19
0
  public Object up(Event evt) {
    Message msg;
    Address dst, src;
    Unicast2Header hdr;

    switch (evt.getType()) {
      case Event.MSG:
        msg = (Message) evt.getArg();
        dst = msg.getDest();

        if (dst == null || msg.isFlagSet(Message.NO_RELIABILITY)) // only handle unicast messages
        break; // pass up

        // changed from removeHeader(): we cannot remove the header because if we do loopback=true
        // at the
        // transport level, we will not have the header on retransmit ! (bela Aug 22 2006)
        hdr = (Unicast2Header) msg.getHeader(this.id);
        if (hdr == null) break;
        src = msg.getSrc();
        switch (hdr.type) {
          case Unicast2Header.DATA: // received regular message
            handleDataReceived(src, hdr.seqno, hdr.conn_id, hdr.first, msg, evt);
            return null; // we pass the deliverable message up in handleDataReceived()
          case Unicast2Header.XMIT_REQ: // received ACK for previously sent message
            handleXmitRequest(src, hdr.seqno, hdr.high_seqno);
            break;
          case Unicast2Header.SEND_FIRST_SEQNO:
            handleResendingOfFirstMessage(src, hdr.seqno);
            break;
          case Unicast2Header.STABLE:
            stable(msg.getSrc(), hdr.conn_id, hdr.seqno, hdr.high_seqno);
            break;
          default:
            log.error("UnicastHeader type " + hdr.type + " not known !");
            break;
        }
        return null;
    }

    return up_prot.up(evt); // Pass up to the layer above us
  }
예제 #20
0
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        StateHeader hdr = (StateHeader) msg.getHeader(this.id);
        if (hdr == null) break;

        switch (hdr.type) {
          case StateHeader.STATE_REQ:
            state_requesters.add(msg.getSrc());
            break;
          case StateHeader.STATE_RSP:
            handleStateRsp(hdr.getDigest(), msg.getSrc(), msg.getBuffer());
            break;
          case StateHeader.STATE_EX:
            closeHoleFor(msg.getSrc());
            handleException((Throwable) msg.getObject());
            break;
          default:
            log.error("%s: type %s not known in StateHeader", local_addr, hdr.type);
            break;
        }
        return null;

      case Event.TMP_VIEW:
      case Event.VIEW_CHANGE:
        handleViewChange((View) evt.getArg());
        break;

      case Event.CONFIG:
        Map<String, Object> config = (Map<String, Object>) evt.getArg();
        if (config != null && config.containsKey("state_transfer"))
          log.error(
              Util.getMessage(
                  "ProtocolStackCannotContainTwoStateTransferProtocolsRemoveEitherOneOfThem"));
        break;
    }
    return up_prot.up(evt);
  }
예제 #21
0
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        if (msg.getDest() == null
            || msg.isFlagSet(Message.Flag.NO_RELIABILITY)) // only handle unicast messages
        break; // pass up

        UnicastHeader hdr = (UnicastHeader) msg.getHeader(this.id);
        if (hdr == null) break;
        Address sender = msg.getSrc();
        switch (hdr.type) {
          case UnicastHeader.DATA: // received regular message
            handleDataReceived(sender, hdr.seqno, hdr.conn_id, hdr.first, msg, evt);
            break;
          default:
            handleUpEvent(sender, hdr);
            break;
        }
        return null;
    }
    return up_prot.up(evt); // Pass up to the layer above us
  }
 public String getHeader() {
   return m.getHeader();
 }
예제 #23
0
파일: dns.java 프로젝트: lemmy/dnsjava
  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;
  }
예제 #24
0
파일: GMS.java 프로젝트: jtoerber/JGroups
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        GmsHeader hdr = (GmsHeader) msg.getHeader(this.id);
        if (hdr == null) break;
        switch (hdr.type) {
          case GmsHeader.JOIN_REQ:
            view_handler.add(
                new Request(Request.JOIN, hdr.mbr, false, null, hdr.useFlushIfPresent));
            break;
          case GmsHeader.JOIN_REQ_WITH_STATE_TRANSFER:
            view_handler.add(
                new Request(
                    Request.JOIN_WITH_STATE_TRANSFER, hdr.mbr, false, null, hdr.useFlushIfPresent));
            break;
          case GmsHeader.JOIN_RSP:
            impl.handleJoinResponse(hdr.join_rsp);
            break;
          case GmsHeader.LEAVE_REQ:
            if (hdr.mbr == null) return null;
            view_handler.add(new Request(Request.LEAVE, hdr.mbr, false));
            break;
          case GmsHeader.LEAVE_RSP:
            impl.handleLeaveResponse();
            break;
          case GmsHeader.VIEW:
            View new_view = hdr.view;
            if (new_view == null) return null;

            Address coord = msg.getSrc();
            if (!new_view.containsMember(coord)) {
              sendViewAck(
                  coord); // we need to send the ack first, otherwise the connection is removed
              impl.handleViewChange(new_view, hdr.my_digest);
            } else {
              impl.handleViewChange(new_view, hdr.my_digest);
              sendViewAck(coord); // send VIEW_ACK to sender of view
            }
            break;

          case GmsHeader.VIEW_ACK:
            Address sender = msg.getSrc();
            ack_collector.ack(sender);
            return null; // don't pass further up

          case GmsHeader.MERGE_REQ:
            impl.handleMergeRequest(msg.getSrc(), hdr.merge_id, hdr.mbrs);
            break;

          case GmsHeader.MERGE_RSP:
            MergeData merge_data =
                new MergeData(msg.getSrc(), hdr.view, hdr.my_digest, hdr.merge_rejected);
            if (log.isTraceEnabled()) {
              log.trace(
                  local_addr
                      + ": got merge response from "
                      + msg.getSrc()
                      + ", merge_id="
                      + hdr.merge_id
                      + ", merge data is "
                      + merge_data);
            }
            impl.handleMergeResponse(merge_data, hdr.merge_id);
            break;

          case GmsHeader.INSTALL_MERGE_VIEW:
            impl.handleMergeView(
                new MergeData(msg.getSrc(), hdr.view, hdr.my_digest), hdr.merge_id);
            break;

          case GmsHeader.INSTALL_DIGEST:
            Digest tmp = hdr.my_digest;
            down_prot.down(new Event(Event.MERGE_DIGEST, tmp));
            break;

          case GmsHeader.INSTALL_MERGE_VIEW_OK:
            // [JGRP-700] - FLUSH: flushing should span merge
            merge_ack_collector.ack(msg.getSrc());
            break;

          case GmsHeader.CANCEL_MERGE:
            // [JGRP-524] - FLUSH and merge: flush doesn't wrap entire merge process
            impl.handleMergeCancelled(hdr.merge_id);
            break;

          case GmsHeader.GET_DIGEST_REQ:
            // only handle this request if it was sent by the coordinator (or at least a member) of
            // the current cluster
            synchronized (members) {
              if (!members.contains(msg.getSrc())) break;
            }

            // discard my own request:
            if (msg.getSrc().equals(local_addr)) return null;

            if (hdr.merge_id != null
                && !(merger.matchMergeId(hdr.merge_id) || merger.setMergeId(null, hdr.merge_id)))
              return null;

            // fetch only my own digest
            Digest digest = (Digest) down_prot.down(new Event(Event.GET_DIGEST, local_addr));
            if (digest != null) {
              GmsHeader rsp_hdr = new GmsHeader(GmsHeader.GET_DIGEST_RSP);
              rsp_hdr.my_digest = digest;
              Message get_digest_rsp = new Message(msg.getSrc(), null, null);
              get_digest_rsp.setFlag(Message.OOB);
              get_digest_rsp.putHeader(this.id, rsp_hdr);
              down_prot.down(new Event(Event.MSG, get_digest_rsp));
            }
            break;

          case GmsHeader.GET_DIGEST_RSP:
            Digest digest_rsp = hdr.my_digest;
            impl.handleDigestResponse(msg.getSrc(), digest_rsp);
            break;

          default:
            if (log.isErrorEnabled()) log.error("GmsHeader with type=" + hdr.type + " not known");
        }
        return null; // don't pass up

      case Event.SUSPECT:
        Object retval = up_prot.up(evt);
        Address suspected = (Address) evt.getArg();
        view_handler.add(new Request(Request.SUSPECT, suspected, true));
        ack_collector.suspect(suspected);
        merge_ack_collector.suspect(suspected);
        return retval;

      case Event.UNSUSPECT:
        impl.unsuspect((Address) evt.getArg());
        return null; // discard

      case Event.MERGE:
        view_handler.add(
            new Request(Request.MERGE, null, false, (Map<Address, View>) evt.getArg()));
        return null; // don't pass up

      case Event.IS_MERGE_IN_PROGRESS:
        return merger.isMergeInProgress();
    }
    return up_prot.up(evt);
  }
예제 #25
0
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {
    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        PingHeader hdr = (PingHeader) msg.getHeader(this.id);
        if (hdr == null) return up_prot.up(evt);

        if (is_leaving) return null; // prevents merging back a leaving member
        // (https://issues.jboss.org/browse/JGRP-1336)

        PingData data = readPingData(msg.getRawBuffer(), msg.getOffset(), msg.getLength());
        Address logical_addr = data != null ? data.getAddress() : msg.src();

        switch (hdr.type) {
          case PingHeader.GET_MBRS_REQ: // return Rsp(local_addr, coord)
            if (cluster_name == null || hdr.cluster_name == null) {
              log.warn(
                  "cluster_name (%s) or cluster_name of header (%s) is null; passing up discovery "
                      + "request from %s, but this should not be the case",
                  cluster_name, hdr.cluster_name, msg.src());
            } else {
              if (!cluster_name.equals(hdr.cluster_name)) {
                log.warn(
                    "%s: discarding discovery request for cluster '%s' from %s; "
                        + "our cluster name is '%s'. Please separate your clusters properly",
                    logical_addr, hdr.cluster_name, msg.src(), cluster_name);
                return null;
              }
            }

            // add physical address and logical name of the discovery sender (if available) to the
            // cache
            if (data != null) {
              addDiscoveryResponseToCaches(
                  logical_addr, data.getLogicalName(), data.getPhysicalAddr());
              discoveryRequestReceived(msg.getSrc(), data.getLogicalName(), data.getPhysicalAddr());
              addResponse(data, false);
            }

            if (return_entire_cache) {
              Map<Address, PhysicalAddress> cache =
                  (Map<Address, PhysicalAddress>)
                      down(new Event(Event.GET_LOGICAL_PHYSICAL_MAPPINGS));
              if (cache != null) {
                for (Map.Entry<Address, PhysicalAddress> entry : cache.entrySet()) {
                  Address addr = entry.getKey();
                  // JGRP-1492: only return our own address, and addresses in view.
                  if (addr.equals(local_addr) || members.contains(addr)) {
                    PhysicalAddress physical_addr = entry.getValue();
                    sendDiscoveryResponse(
                        addr, physical_addr, UUID.get(addr), msg.getSrc(), isCoord(addr));
                  }
                }
              }
              return null;
            }

            // Only send a response if hdr.mbrs is not empty and contains myself. Otherwise always
            // send my info
            Collection<? extends Address> mbrs = data != null ? data.mbrs() : null;
            boolean send_response = mbrs == null || mbrs.contains(local_addr);
            if (send_response) {
              PhysicalAddress physical_addr =
                  (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr));
              sendDiscoveryResponse(
                  local_addr, physical_addr, UUID.get(local_addr), msg.getSrc(), is_coord);
            }
            return null;

          case PingHeader.GET_MBRS_RSP:
            // add physical address (if available) to transport's cache
            if (data != null) {
              log.trace("%s: received GET_MBRS_RSP from %s: %s", local_addr, msg.src(), data);
              handleDiscoveryResponse(data, msg.src());
            }
            return null;

          default:
            log.warn("got PING header with unknown type %d", hdr.type);
            return null;
        }

      case Event.FIND_MBRS:
        return findMembers(
            (List<Address>) evt.getArg(), false, true); // this is done asynchronously
    }

    return up_prot.up(evt);
  }
 // ------------------------------------------------------------
 public void deliveryFailed(int seqNum, Message mess) {
   MBusListener[] all = getMatchingTargets(mess.getHeader().getSourceAddress());
   for (int i = 0; i < all.length; i++) all[i].deliveryFailed(seqNum, mess);
 }
예제 #27
0
  public Object up(Message msg) {
    ExecutorHeader hdr = msg.getHeader(id);
    if (hdr == null) return up_prot.up(msg);

    Request req = msg.getObject();
    if (log.isTraceEnabled()) log.trace("[" + local_addr + "] <-- [" + msg.getSrc() + "] " + req);
    switch (req.type) {
      case RUN_REQUEST:
        handleTaskRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_READY:
        handleConsumerReadyRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_UNREADY:
        handleConsumerUnreadyRequest(req.request, (Address) req.object);
        break;
      case CONSUMER_FOUND:
        handleConsumerFoundResponse(req.request, (Address) req.object);
        break;
      case RUN_SUBMITTED:
        RequestWithThread reqWT = (RequestWithThread) req;
        Object objectToRun = reqWT.object;
        Runnable runnable;
        if (objectToRun instanceof Runnable) {
          runnable = (Runnable) objectToRun;
        } else if (objectToRun instanceof Callable) {
          @SuppressWarnings("unchecked")
          Callable<Object> callable = (Callable<Object>) objectToRun;
          runnable = new FutureTask<>(callable);
        } else {
          log.error(
              Util.getMessage("RequestOfType")
                  + req.type
                  + " sent an object of "
                  + objectToRun
                  + " which is invalid");
          break;
        }

        handleTaskSubmittedRequest(runnable, msg.getSrc(), req.request, reqWT.threadId);
        break;
      case RUN_REJECTED:
        // We could make requests local for this, but is it really worth it
        handleTaskRejectedResponse(msg.getSrc(), req.request);
        break;
      case RESULT_SUCCESS:
        handleValueResponse(msg.getSrc(), req.request, req.object);
        break;
      case RESULT_EXCEPTION:
        handleExceptionResponse(msg.getSrc(), req.request, (Throwable) req.object);
        break;
      case INTERRUPT_RUN:
        // We could make requests local for this, but is it really worth it
        handleInterruptRequest(msg.getSrc(), req.request);
        break;
      case CREATE_CONSUMER_READY:
        Owner owner = new Owner((Address) req.object, req.request);
        handleNewConsumer(owner);
        break;
      case CREATE_RUN_REQUEST:
        owner = new Owner((Address) req.object, req.request);
        handleNewRunRequest(owner);
        break;
      case DELETE_CONSUMER_READY:
        owner = new Owner((Address) req.object, req.request);
        handleRemoveConsumer(owner);
        break;
      case DELETE_RUN_REQUEST:
        owner = new Owner((Address) req.object, req.request);
        handleRemoveRunRequest(owner);
        break;
      default:
        log.error(Util.getMessage("RequestOfType") + req.type + " not known");
        break;
    }
    return null;
  }
 // ---------------------------------------------------------------
 public void deliverySuccessful(int seqNum, Message mess) {
   //  	log("VTL.deliverySuccessful: "+mess);
   MBusListener[] all = getMatchingTargets(mess.getHeader().getSourceAddress());
   //  	log("VTL: "+all.length+" matching targets for "+mess.getHeader().getSourceAddress());
   for (int i = 0; i < all.length; i++) all[i].deliverySuccessful(seqNum, mess);
 }
예제 #29
0
파일: Cache.java 프로젝트: lemmy/dnsjava
  /**
   * Adds all data from a Message into the Cache. Each record is added with the appropriate
   * credibility, and negative answers are cached as such.
   *
   * @param in The Message to be added
   * @see Message
   */
  public void addMessage(Message in) {
    boolean isAuth = in.getHeader().getFlag(Flags.AA);
    Name qname = in.getQuestion().getName();
    Name curname = qname;
    short qtype = in.getQuestion().getType();
    short qclass = in.getQuestion().getDClass();
    byte cred;
    short rcode = in.getHeader().getRcode();
    boolean haveAnswer = false;
    boolean completed = false;
    boolean restart = false;
    RRset[] answers, auth, addl;

    if (rcode != Rcode.NOERROR && rcode != Rcode.NXDOMAIN) return;

    if (secure) {
      Cache c = new Cache(dclass);
      c.addMessage(in);
      verifyRecords(c);
      return;
    }

    answers = in.getSectionRRsets(Section.ANSWER);
    for (int i = 0; i < answers.length; i++) {
      if (answers[i].getDClass() != qclass) continue;
      short type = answers[i].getType();
      Name name = answers[i].getName();
      cred = getCred(Section.ANSWER, isAuth);
      if (type == Type.CNAME && name.equals(curname)) {
        CNAMERecord cname;
        addRRset(answers[i], cred);
        cname = (CNAMERecord) answers[i].first();
        curname = cname.getTarget();
        restart = true;
        haveAnswer = true;
      } else if (type == Type.DNAME && curname.subdomain(name)) {
        DNAMERecord dname;
        addRRset(answers[i], cred);
        dname = (DNAMERecord) answers[i].first();
        try {
          curname = curname.fromDNAME(dname);
        } catch (NameTooLongException e) {
          break;
        }
        restart = true;
        haveAnswer = true;
      } else if ((type == qtype || qtype == Type.ANY) && name.equals(curname)) {
        addRRset(answers[i], cred);
        completed = true;
        haveAnswer = true;
      }
      if (restart) {
        restart = false;
        i = 0;
      }
    }

    auth = in.getSectionRRsets(Section.AUTHORITY);
    if (!completed) {
      /* This is a negative response or a referral. */
      RRset soa = null, ns = null;
      for (int i = 0; i < auth.length; i++) {
        if (auth[i].getType() == Type.SOA && curname.subdomain(auth[i].getName())) soa = auth[i];
        else if (auth[i].getType() == Type.NS && curname.subdomain(auth[i].getName())) ns = auth[i];
      }
      short cachetype = (rcode == Rcode.NXDOMAIN) ? (short) 0 : qtype;
      if (soa != null || ns == null) {
        /* Negative response */
        cred = getCred(Section.AUTHORITY, isAuth);
        SOARecord soarec = null;
        if (soa != null) soarec = (SOARecord) soa.first();
        addNegative(curname, cachetype, soarec, cred);
        /* NXT records are not cached yet. */
      } else {
        /* Referral response */
        cred = getCred(Section.AUTHORITY, isAuth);
        addRRset(ns, cred);
      }
    }

    addl = in.getSectionRRsets(Section.ADDITIONAL);
    for (int i = 0; i < addl.length; i++) {
      short type = addl[i].getType();
      if (type != Type.A && type != Type.AAAA && type != Type.A6) continue;
      /* XXX check the name */
      Name name = addl[i].getName();
      cred = getCred(Section.ADDITIONAL, isAuth);
      addRRset(addl[i], cred);
    }
  }
예제 #30
0
  /**
   * An event was received from the layer below. Usually the current layer will want to examine the
   * event type and - depending on its type - perform some computation (e.g. removing headers from a
   * MSG event type, or updating the internal membership list when receiving a VIEW_CHANGE event).
   * Finally the event is either a) discarded, or b) an event is sent down the stack using <code>
   * PassDown</code> or c) the event (or another event) is sent up the stack using <code>PassUp
   * </code>.
   *
   * <p>For the PING protocol, the Up operation does the following things. 1. If the event is a
   * Event.MSG then PING will inspect the message header. If the header is null, PING simply passes
   * up the event If the header is PingHeader.GET_MBRS_REQ then the PING protocol will PassDown a
   * PingRequest message If the header is PingHeader.GET_MBRS_RSP we will add the message to the
   * initial members vector and wake up any waiting threads. 2. If the event is Event.SET_LOCAL_ADDR
   * we will simple set the local address of this protocol 3. For all other messages we simple pass
   * it up to the protocol above
   *
   * @param evt - the event that has been sent from the layer below
   */
  @SuppressWarnings("unchecked")
  public Object up(Event evt) {

    switch (evt.getType()) {
      case Event.MSG:
        Message msg = (Message) evt.getArg();
        PingHeader hdr = (PingHeader) msg.getHeader(this.id);
        if (hdr == null) return up_prot.up(evt);

        PingData data = hdr.data;
        Address logical_addr = data != null ? data.getAddress() : null;

        if (is_leaving) return null; // prevents merging back a leaving member
        // (https://issues.jboss.org/browse/JGRP-1336)

        switch (hdr.type) {
          case PingHeader.GET_MBRS_REQ: // return Rsp(local_addr, coord)
            if (group_addr == null || hdr.cluster_name == null) {
              if (log.isWarnEnabled())
                log.warn(
                    "group_addr ("
                        + group_addr
                        + ") or cluster_name of header ("
                        + hdr.cluster_name
                        + ") is null; passing up discovery request from "
                        + msg.getSrc()
                        + ", but this should not"
                        + " be the case");
            } else {
              if (!group_addr.equals(hdr.cluster_name)) {
                if (log.isWarnEnabled())
                  log.warn(
                      "discarding discovery request for cluster '"
                          + hdr.cluster_name
                          + "' from "
                          + msg.getSrc()
                          + "; our cluster name is '"
                          + group_addr
                          + "'. "
                          + "Please separate your clusters cleanly.");
                return null;
              }
            }

            // add physical address and logical name of the discovery sender (if available) to the
            // cache
            if (data != null) {
              if (logical_addr == null) logical_addr = msg.getSrc();
              Collection<PhysicalAddress> physical_addrs = data.getPhysicalAddrs();
              PhysicalAddress physical_addr =
                  physical_addrs != null && !physical_addrs.isEmpty()
                      ? physical_addrs.iterator().next()
                      : null;
              if (logical_addr != null && physical_addr != null)
                down(
                    new Event(
                        Event.SET_PHYSICAL_ADDRESS,
                        new Tuple<Address, PhysicalAddress>(logical_addr, physical_addr)));
              if (logical_addr != null && data.getLogicalName() != null)
                UUID.add(logical_addr, data.getLogicalName());
              discoveryRequestReceived(msg.getSrc(), data.getLogicalName(), physical_addrs);

              synchronized (ping_responses) {
                for (Responses response : ping_responses) {
                  response.addResponse(data, false);
                }
              }
            }

            if (hdr.view_id != null) {
              // If the discovery request is merge-triggered, and the ViewId shipped with it
              // is the same as ours, we don't respond (JGRP-1315).
              ViewId my_view_id = view != null ? view.getViewId() : null;
              if (my_view_id != null && my_view_id.equals(hdr.view_id)) return null;

              boolean send_discovery_rsp =
                  force_sending_discovery_rsps
                      || is_coord
                      || current_coord == null
                      || current_coord.equals(msg.getSrc());
              if (!send_discovery_rsp) {
                if (log.isTraceEnabled())
                  log.trace(
                      local_addr
                          + ": suppressing merge response as I'm not a coordinator and the "
                          + "discovery request was not sent by a coordinator");
                return null;
              }
            }

            if (isMergeRunning()) {
              if (log.isTraceEnabled())
                log.trace(
                    local_addr + ": suppressing merge response as a merge is already in progress");
              return null;
            }

            List<PhysicalAddress> physical_addrs =
                hdr.view_id != null
                    ? null
                    : Arrays.asList(
                        (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr)));
            sendDiscoveryResponse(
                local_addr,
                physical_addrs,
                is_server,
                hdr.view_id != null,
                UUID.get(local_addr),
                msg.getSrc());
            return null;

          case PingHeader.GET_MBRS_RSP: // add response to vector and notify waiting thread
            // add physical address (if available) to transport's cache
            if (data != null) {
              Address response_sender = msg.getSrc();
              if (logical_addr == null) logical_addr = msg.getSrc();
              Collection<PhysicalAddress> addrs = data.getPhysicalAddrs();
              PhysicalAddress physical_addr =
                  addrs != null && !addrs.isEmpty() ? addrs.iterator().next() : null;
              if (logical_addr != null && physical_addr != null)
                down(
                    new Event(
                        Event.SET_PHYSICAL_ADDRESS,
                        new Tuple<Address, PhysicalAddress>(logical_addr, physical_addr)));
              if (logical_addr != null && data.getLogicalName() != null)
                UUID.add(logical_addr, data.getLogicalName());

              if (log.isTraceEnabled())
                log.trace(
                    local_addr + ": received GET_MBRS_RSP from " + response_sender + ": " + data);
              boolean overwrite = logical_addr != null && logical_addr.equals(response_sender);
              synchronized (ping_responses) {
                for (Responses response : ping_responses) {
                  response.addResponse(data, overwrite);
                }
              }
            }
            return null;

          default:
            if (log.isWarnEnabled())
              log.warn("got PING header with unknown type (" + hdr.type + ')');
            return null;
        }

      case Event.GET_PHYSICAL_ADDRESS:
        try {
          sendDiscoveryRequest(group_addr, null, null);
        } catch (InterruptedIOException ie) {
          if (log.isWarnEnabled()) {
            log.warn("Discovery request for cluster " + group_addr + " interrupted");
          }
          Thread.currentThread().interrupt();
        } catch (Exception ex) {
          if (log.isErrorEnabled()) log.error("failed sending discovery request", ex);
        }
        return null;

      case Event.FIND_INITIAL_MBRS: // sent by transport
        return findInitialMembers(null);
    }

    return up_prot.up(evt);
  }