// Copyright 2003-2005 Arthur van Hoff, Rick Blair
   // Licensed under Apache License version 2.0
   // Original license LGPL
   
   package javax.jmdns.impl;
   
   import java.io.DataOutputStream;
   import java.io.IOException;
   import java.io.UnsupportedEncodingException;
  import java.net.Inet4Address;
  import java.net.Inet6Address;
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  
  import javax.jmdns.ServiceEvent;
  import javax.jmdns.ServiceInfo;
  import javax.jmdns.ServiceInfo.Fields;
  import javax.jmdns.impl.DNSOutgoing.MessageOutputStream;
  import javax.jmdns.impl.constants.DNSConstants;
  import javax.jmdns.impl.constants.DNSRecordClass;
  import javax.jmdns.impl.constants.DNSRecordType;
  
  /**
   * DNS record
   *
   * @author Arthur van Hoff, Rick Blair, Werner Randelshofer, Pierre Frisch
   */
  public abstract class DNSRecord extends DNSEntry {
      private static Logger logger = Logger.getLogger(DNSRecord.class.getName());
      private int           _ttl;
      private long          _created;
  
      /**
       * This source is mainly for debugging purposes, should be the address that sent this record.
       */
      private InetAddress   _source;
  
      /**
       * Create a DNSRecord with a name, type, class, and ttl.
       */
      DNSRecord(String name, DNSRecordType type, DNSRecordClass recordClass, boolean unique, int ttl) {
          super(name, type, recordClass, unique);
          this._ttl = ttl;
          this._created = System.currentTimeMillis();
      }
  
      /*
       * (non-Javadoc)
       * @see javax.jmdns.impl.DNSEntry#equals(java.lang.Object)
       */
      @Override
      public boolean equals(Object other) {
          return (other instanceof DNSRecord) && super.equals(other) && sameValue((DNSRecord) other);
      }
  
      /**
       * True if this record has the same value as some other record.
       */
      abstract boolean sameValue(DNSRecord other);
  
      /**
       * True if this record has the same type as some other record.
       */
      boolean sameType(DNSRecord other) {
          return this.getRecordType() == other.getRecordType();
      }
  
      /**
       * Handles a query represented by this record.
       *
       * @return Returns true if a conflict with one of the services registered with JmDNS or with the hostname occured.
       */
      abstract boolean handleQuery(JmDNSImpl dns, long expirationTime);
  
      /**
       * Handles a response represented by this record.
       *
       * @return Returns true if a conflict with one of the services registered with JmDNS or with the hostname occured.
       */
      abstract boolean handleResponse(JmDNSImpl dns);
  
      /**
       * Adds this as an answer to the provided outgoing datagram.
       */
      abstract DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException;
  
      /**
       * True if this record is suppressed by the answers in a message.
       */
      boolean suppressedBy(DNSIncoming msg) {
          try {
              for (DNSRecord answer : msg.getAllAnswers()) {
                  if (suppressedBy(answer)) {
                      return true;
                  }
             }
             return false;
         } catch (ArrayIndexOutOfBoundsException e) {
             logger.log(Level.WARNING, "suppressedBy() message " + msg + " exception ", e);
             // msg.print(true);
             return false;
         }
     }
 
     /**
      * True if this record would be suppressed by an answer. This is the case if this record would not have a significantly longer TTL.
      */
     boolean suppressedBy(DNSRecord other) {
         if (this.equals(other) && (other._ttl > _ttl / 2)) {
             return true;
         }
         return false;
     }
 
     /**
      * Get the expiration time of this record.
      */
     long getExpirationTime(int percent) {
         // ttl is in seconds the constant 10 is 1000 ms / 100 %
         return _created + (percent * _ttl * 10L);
     }
 
     /**
      * Get the remaining TTL for this record.
      */
     int getRemainingTTL(long now) {
         return (int) Math.max(0, (getExpirationTime(100) - now) / 1000);
     }
 
     /*
      * (non-Javadoc)
      * @see javax.jmdns.impl.DNSEntry#isExpired(long)
      */
     @Override
     public boolean isExpired(long now) {
         return getExpirationTime(100) <= now;
     }
 
     /*
      * (non-Javadoc)
      * @see javax.jmdns.impl.DNSEntry#isStale(long)
      */
     @Override
     public boolean isStale(long now) {
         return getExpirationTime(50) <= now;
     }
 
     /**
      * Reset the TTL of a record. This avoids having to update the entire record in the cache.
      */
     void resetTTL(DNSRecord other) {
         _created = other._created;
         _ttl = other._ttl;
     }
 
     /**
      * When a record flushed we don't remove it immediately, but mark it for rapid decay.
      */
     void setWillExpireSoon(long now) {
         _created = now;
         _ttl = DNSConstants.RECORD_EXPIRY_DELAY;
     }
 
     /**
      * Write this record into an outgoing message.
      */
     abstract void write(MessageOutputStream out);
 
     public static class IPv4Address extends Address {
 
         IPv4Address(String name, DNSRecordClass recordClass, boolean unique, int ttl, InetAddress addr) {
             super(name, DNSRecordType.TYPE_A, recordClass, unique, ttl, addr);
         }
 
         IPv4Address(String name, DNSRecordClass recordClass, boolean unique, int ttl, byte[] rawAddress) {
             super(name, DNSRecordType.TYPE_A, recordClass, unique, ttl, rawAddress);
         }
 
         @Override
         void write(MessageOutputStream out) {
             if (_addr != null) {
                 byte[] buffer = _addr.getAddress();
                 // If we have a type A records we should answer with a IPv4 address
                 if (_addr instanceof Inet4Address) {
                     // All is good
                 } else {
                     // Get the last four bytes
                     byte[] tempbuffer = buffer;
                     buffer = new byte[4];
                     System.arraycopy(tempbuffer, 12, buffer, 0, 4);
                 }
                 int length = buffer.length;
                 out.writeBytes(buffer, 0, length);
             }
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
 
             ServiceInfoImpl info = (ServiceInfoImpl) super.getServiceInfo(persistent);
             info.addAddress((Inet4Address) _addr);
             return info;
         }
 
     }
 
     public static class IPv6Address extends Address {
 
         IPv6Address(String name, DNSRecordClass recordClass, boolean unique, int ttl, InetAddress addr) {
             super(name, DNSRecordType.TYPE_AAAA, recordClass, unique, ttl, addr);
         }
 
         IPv6Address(String name, DNSRecordClass recordClass, boolean unique, int ttl, byte[] rawAddress) {
             super(name, DNSRecordType.TYPE_AAAA, recordClass, unique, ttl, rawAddress);
         }
 
         @Override
         void write(MessageOutputStream out) {
             if (_addr != null) {
                 byte[] buffer = _addr.getAddress();
                 // If we have a type AAAA records we should answer with a IPv6 address
                 if (_addr instanceof Inet4Address) {
                     byte[] tempbuffer = buffer;
                     buffer = new byte[16];
                     for (int i = 0; i < 16; i++) {
                         if (i < 11) {
                             buffer[i] = tempbuffer[i - 12];
                         } else {
                             buffer[i] = 0;
                         }
                     }
                 }
                 int length = buffer.length;
                 out.writeBytes(buffer, 0, length);
             }
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
 
             ServiceInfoImpl info = (ServiceInfoImpl) super.getServiceInfo(persistent);
             info.addAddress((Inet6Address) _addr);
             return info;
         }
 
     }
 
     /**
      * Address record.
      */
     public static abstract class Address extends DNSRecord {
         private static Logger logger1 = Logger.getLogger(Address.class.getName());
 
         InetAddress           _addr;
 
         protected Address(String name, DNSRecordType type, DNSRecordClass recordClass, boolean unique, int ttl, InetAddress addr) {
             super(name, type, recordClass, unique, ttl);
             this._addr = addr;
         }
 
         protected Address(String name, DNSRecordType type, DNSRecordClass recordClass, boolean unique, int ttl, byte[] rawAddress) {
             super(name, type, recordClass, unique, ttl);
             try {
                 this._addr = InetAddress.getByAddress(rawAddress);
             } catch (UnknownHostException exception) {
                 logger1.log(Level.WARNING, "Address() exception ", exception);
             }
         }
 
         boolean same(DNSRecord other) {
             if (! (other instanceof Address) ) {
                 return false;
             }
             return ((sameName(other)) && ((sameValue(other))));
         }
 
         boolean sameName(DNSRecord other) {
             return this.getName().equalsIgnoreCase(other.getName());
         }
 
         @Override
         boolean sameValue(DNSRecord other) {
             if (! (other instanceof Address) ) {
                 return false;
             }
             Address address = (Address) other;
             if ((this.getAddress() == null) && (address.getAddress() != null)) {
                 return false;
             }
             return this.getAddress().equals(address.getAddress());
         }
 
         @Override
         public boolean isSingleValued() {
             return false;
         }
 
         InetAddress getAddress() {
             return _addr;
         }
 
         /**
          * Creates a byte array representation of this record. This is needed for tie-break tests according to draft-cheshire-dnsext-multicastdns-04.txt chapter 9.2.
          */
         @Override
         protected void toByteArray(DataOutputStream dout) throws IOException {
             super.toByteArray(dout);
             byte[] buffer = this.getAddress().getAddress();
             for (int i = 0; i < buffer.length; i++) {
                 dout.writeByte(buffer[i]);
             }
         }
 
         /**
          * Does the necessary actions, when this as a query.
          */
         @Override
         boolean handleQuery(JmDNSImpl dns, long expirationTime) {
             if (dns.getLocalHost().conflictWithRecord(this)) {
                 DNSRecord.Address localAddress = dns.getLocalHost().getDNSAddressRecord(this.getRecordType(), this.isUnique(), DNSConstants.DNS_TTL);
                 int comparison = this.compareTo(localAddress);
 
                 if (comparison == 0) {
                     // the 2 records are identical this probably means we are seeing our own record.
                     // With multiple interfaces on a single computer it is possible to see our
                     // own records come in on different interfaces than the ones they were sent on.
                     // see section "10. Conflict Resolution" of mdns draft spec.
                     logger1.finer("handleQuery() Ignoring an identical address query");
                     return false;
                 }
 
                 logger1.finer("handleQuery() Conflicting query detected.");
                 // Tie breaker test
                 if (dns.isProbing() && comparison > 0) {
                     // We lost the tie-break. We have to choose a different name.
                     dns.getLocalHost().incrementHostName();
                     dns.getCache().clear();
                     for (ServiceInfo serviceInfo : dns.getServices().values()) {
                         ServiceInfoImpl info = (ServiceInfoImpl) serviceInfo;
                         info.revertState();
                     }
                 }
                 dns.revertState();
                 return true;
             }
             return false;
         }
 
         /**
          * Does the necessary actions, when this as a response.
          */
         @Override
         boolean handleResponse(JmDNSImpl dns) {
             if (dns.getLocalHost().conflictWithRecord(this)) {
                 logger1.finer("handleResponse() Denial detected");
 
                 if (dns.isProbing()) {
                     dns.getLocalHost().incrementHostName();
                     dns.getCache().clear();
                     for (ServiceInfo serviceInfo : dns.getServices().values()) {
                         ServiceInfoImpl info = (ServiceInfoImpl) serviceInfo;
                         info.revertState();
                     }
                 }
                 dns.revertState();
                 return true;
             }
             return false;
         }
 
         @Override
         DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException {
             return out;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
             ServiceInfoImpl info = new ServiceInfoImpl(this.getQualifiedNameMap(), 0, 0, 0, persistent, (byte[]) null);
             // info.setAddress(_addr); This is done in the sub class so we don't have to test for class type
             return info;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceEvent(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         public ServiceEvent getServiceEvent(JmDNSImpl dns) {
             ServiceInfo info = this.getServiceInfo(false);
             ((ServiceInfoImpl) info).setDns(dns);
             return new ServiceEventImpl(dns, info.getType(), info.getName(), info);
         }
 
         /*
          * (non-Javadoc)
          * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
          */
         @Override
         protected void toString(StringBuilder aLog) {
             super.toString(aLog);
             aLog.append(" address: '" + (this.getAddress() != null ? this.getAddress().getHostAddress() : "null") + "'");
         }
 
     }
 
     /**
      * Pointer record.
      */
     public static class Pointer extends DNSRecord {
         // private static Logger logger = Logger.getLogger(Pointer.class.getName());
         private final String _alias;
 
         public Pointer(String name, DNSRecordClass recordClass, boolean unique, int ttl, String alias) {
             super(name, DNSRecordType.TYPE_PTR, recordClass, unique, ttl);
             this._alias = alias;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSEntry#isSameEntry(javax.jmdns.impl.DNSEntry)
          */
         @Override
         public boolean isSameEntry(DNSEntry entry) {
             return super.isSameEntry(entry) && (entry instanceof Pointer) && this.sameValue((Pointer) entry);
         }
 
         @Override
         void write(MessageOutputStream out) {
             out.writeName(_alias);
         }
 
         @Override
         boolean sameValue(DNSRecord other) {
             if (! (other instanceof Pointer) ) {
                 return false;
             }
             Pointer pointer = (Pointer) other;
             if ((_alias == null) && (pointer._alias != null)) {
                 return false;
             }
             return _alias.equals(pointer._alias);
         }
 
         @Override
         public boolean isSingleValued() {
             return false;
         }
 
         @Override
         boolean handleQuery(JmDNSImpl dns, long expirationTime) {
             // Nothing to do (?)
             // I think there is no possibility for conflicts for this record type?
             return false;
         }
 
         @Override
         boolean handleResponse(JmDNSImpl dns) {
             // Nothing to do (?)
             // I think there is no possibility for conflicts for this record type?
             return false;
         }
 
         String getAlias() {
             return _alias;
         }
 
         @Override
         DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException {
             return out;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
             if (this.isServicesDiscoveryMetaQuery()) {
                 // The service name is in the alias
                 Map<Fields, String> map = ServiceInfoImpl.decodeQualifiedNameMapForType(this.getAlias());
                 return new ServiceInfoImpl(map, 0, 0, 0, persistent, (byte[]) null);
             } else if (this.isReverseLookup()) {
                 return new ServiceInfoImpl(this.getQualifiedNameMap(), 0, 0, 0, persistent, (byte[]) null);
             } else if (this.isDomainDiscoveryQuery()) {
                 // FIXME [PJYF Nov 16 2010] We do not currently support domain discovery
                 return new ServiceInfoImpl(this.getQualifiedNameMap(), 0, 0, 0, persistent, (byte[]) null);
             }
             Map<Fields, String> map = ServiceInfoImpl.decodeQualifiedNameMapForType(this.getAlias());
             map.put(Fields.Subtype, this.getQualifiedNameMap().get(Fields.Subtype));
             return new ServiceInfoImpl(map, 0, 0, 0, persistent, this.getAlias());
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceEvent(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         public ServiceEvent getServiceEvent(JmDNSImpl dns) {
             ServiceInfo info = this.getServiceInfo(false);
             ((ServiceInfoImpl) info).setDns(dns);
             String domainName = info.getType();
             String serviceName = JmDNSImpl.toUnqualifiedName(domainName, this.getAlias());
             return new ServiceEventImpl(dns, domainName, serviceName, info);
         }
 
         /*
          * (non-Javadoc)
          * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
          */
         @Override
         protected void toString(StringBuilder aLog) {
             super.toString(aLog);
             aLog.append(" alias: '" + (_alias != null ? _alias.toString() : "null") + "'");
         }
 
     }
 
     public final static byte[] EMPTY_TXT = new byte[] { 0 };
 
     public static class Text extends DNSRecord {
         // private static Logger logger = Logger.getLogger(Text.class.getName());
         private final byte[] _text;
 
         public Text(String name, DNSRecordClass recordClass, boolean unique, int ttl, byte text[]) {
             super(name, DNSRecordType.TYPE_TXT, recordClass, unique, ttl);
             this._text = (text != null && text.length > 0 ? text : EMPTY_TXT);
         }
 
         /**
          * @return the text
          */
         byte[] getText() {
             return this._text;
         }
 
         @Override
         void write(MessageOutputStream out) {
             out.writeBytes(_text, 0, _text.length);
         }
 
         @Override
         boolean sameValue(DNSRecord other) {
             if (! (other instanceof Text) ) {
                 return false;
             }
             Text txt = (Text) other;
             if ((_text == null) && (txt._text != null)) {
                 return false;
             }
             if (txt._text.length != _text.length) {
                 return false;
             }
             for (int i = _text.length; i-- > 0;) {
                 if (txt._text[i] != _text[i]) {
                     return false;
                 }
             }
             return true;
         }
 
         @Override
         public boolean isSingleValued() {
             return true;
         }
 
         @Override
         boolean handleQuery(JmDNSImpl dns, long expirationTime) {
             // Nothing to do (?)
             // I think there is no possibility for conflicts for this record type?
             return false;
         }
 
         @Override
         boolean handleResponse(JmDNSImpl dns) {
             // Nothing to do (?)
             // Shouldn't we care if we get a conflict at this level?
             /*
              * ServiceInfo info = (ServiceInfo) dns.services.get(name.toLowerCase()); if (info != null) { if (! Arrays.equals(text,info.text)) { info.revertState(); return true; } }
              */
             return false;
         }
 
         @Override
         DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException {
             return out;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
             return new ServiceInfoImpl(this.getQualifiedNameMap(), 0, 0, 0, persistent, _text);
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceEvent(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         public ServiceEvent getServiceEvent(JmDNSImpl dns) {
             ServiceInfo info = this.getServiceInfo(false);
             ((ServiceInfoImpl) info).setDns(dns);
             return new ServiceEventImpl(dns, info.getType(), info.getName(), info);
         }
 
         /*
          * (non-Javadoc)
          * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
          */
         @Override
         protected void toString(StringBuilder aLog) {
             super.toString(aLog);
             aLog.append(" text: '" + ((_text.length > 20) ? new String(_text, 0, 17) + "..." : new String(_text)) + "'");
         }
 
     }
 
     /**
      * Service record.
      */
     public static class Service extends DNSRecord {
         private static Logger logger1 = Logger.getLogger(Service.class.getName());
         private final int     _priority;
         private final int     _weight;
         private final int     _port;
         private final String  _server;
 
         public Service(String name, DNSRecordClass recordClass, boolean unique, int ttl, int priority, int weight, int port, String server) {
             super(name, DNSRecordType.TYPE_SRV, recordClass, unique, ttl);
             this._priority = priority;
             this._weight = weight;
             this._port = port;
             this._server = server;
         }
 
         @Override
         void write(MessageOutputStream out) {
             out.writeShort(_priority);
             out.writeShort(_weight);
             out.writeShort(_port);
             if (DNSIncoming.USE_DOMAIN_NAME_FORMAT_FOR_SRV_TARGET) {
                 out.writeName(_server);
             } else {
                 // [PJYF Nov 13 2010] Do we still need this? This looks really bad. All label are supposed to start by a length.
                 out.writeUTF(_server, 0, _server.length());
 
                 // add a zero byte to the end just to be safe, this is the strange form
                 // used by the BonjourConformanceTest
                 out.writeByte(0);
             }
         }
 
         @Override
         protected void toByteArray(DataOutputStream dout) throws IOException {
             super.toByteArray(dout);
             dout.writeShort(_priority);
             dout.writeShort(_weight);
             dout.writeShort(_port);
             try {
                 dout.write(_server.getBytes("UTF-8"));
             } catch (UnsupportedEncodingException exception) {
                 /* UTF-8 is always present */
             }
         }
 
         String getServer() {
             return _server;
         }
 
         /**
          * @return the priority
          */
         public int getPriority() {
             return this._priority;
         }
 
         /**
          * @return the weight
          */
         public int getWeight() {
             return this._weight;
         }
 
         /**
          * @return the port
          */
         public int getPort() {
             return this._port;
         }
 
         @Override
         boolean sameValue(DNSRecord other) {
             if (! (other instanceof Service) ) {
                 return false;
             }
             Service s = (Service) other;
             return (_priority == s._priority) && (_weight == s._weight) && (_port == s._port) && _server.equals(s._server);
         }
 
         @Override
         public boolean isSingleValued() {
             return true;
         }
 
         @Override
         boolean handleQuery(JmDNSImpl dns, long expirationTime) {
             ServiceInfoImpl info = (ServiceInfoImpl) dns.getServices().get(this.getKey());
             if (info != null && (info.isAnnouncing() || info.isAnnounced()) && (_port != info.getPort() || !_server.equalsIgnoreCase(dns.getLocalHost().getName()))) {
                 logger1.finer("handleQuery() Conflicting probe detected from: " + getRecordSource());
                 DNSRecord.Service localService = new DNSRecord.Service(info.getQualifiedName(), DNSRecordClass.CLASS_IN, DNSRecordClass.UNIQUE, DNSConstants.DNS_TTL, info.getPriority(), info.getWeight(), info.getPort(), dns.getLocalHost().getName());
 
                 // This block is useful for debugging race conditions when jmdns is responding to itself.
                 try {
                     if (dns.getInterface().equals(getRecordSource())) {
                         logger1.warning("Got conflicting probe from ourselves\n" + "incoming: " + this.toString() + "\n" + "local   : " + localService.toString());
                     }
                 } catch (IOException e) {
                     logger1.log(Level.WARNING, "IOException", e);
                 }
 
                 int comparison = this.compareTo(localService);
 
                 if (comparison == 0) {
                     // the 2 records are identical this probably means we are seeing our own record.
                     // With multiple interfaces on a single computer it is possible to see our
                     // own records come in on different interfaces than the ones they were sent on.
                     // see section "10. Conflict Resolution" of mdns draft spec.
                     logger1.finer("handleQuery() Ignoring a identical service query");
                     return false;
                 }
 
                 // Tie breaker test
                 if (info.isProbing() && comparison > 0) {
                     // We lost the tie break
                     String oldName = info.getQualifiedName().toLowerCase();
                     info.setName(dns.incrementName(info.getName()));
                     dns.getServices().remove(oldName);
                     dns.getServices().put(info.getQualifiedName().toLowerCase(), info);
                     logger1.finer("handleQuery() Lost tie break: new unique name chosen:" + info.getName());
 
                     // We revert the state to start probing again with the new name
                     info.revertState();
                 } else {
                     // We won the tie break, so this conflicting probe should be ignored
                     // See paragraph 3 of section 9.2 in mdns draft spec
                     return false;
                 }
 
                 return true;
 
             }
             return false;
         }
 
         @Override
         boolean handleResponse(JmDNSImpl dns) {
             ServiceInfoImpl info = (ServiceInfoImpl) dns.getServices().get(this.getKey());
             if (info != null && (_port != info.getPort() || !_server.equalsIgnoreCase(dns.getLocalHost().getName()))) {
                 logger1.finer("handleResponse() Denial detected");
 
                 if (info.isProbing()) {
                     String oldName = info.getQualifiedName().toLowerCase();
                     info.setName(dns.incrementName(info.getName()));
                     dns.getServices().remove(oldName);
                     dns.getServices().put(info.getQualifiedName().toLowerCase(), info);
                     logger1.finer("handleResponse() New unique name chose:" + info.getName());
 
                 }
                 info.revertState();
                 return true;
             }
             return false;
         }
 
         @Override
         DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException {
             ServiceInfoImpl info = (ServiceInfoImpl) dns.getServices().get(this.getKey());
             if (info != null) {
                 if (this._port == info.getPort() != _server.equals(dns.getLocalHost().getName())) {
                     return dns.addAnswer(in, addr, port, out, new DNSRecord.Service(info.getQualifiedName(), DNSRecordClass.CLASS_IN, DNSRecordClass.UNIQUE, DNSConstants.DNS_TTL, info.getPriority(), info.getWeight(), info.getPort(), dns
                             .getLocalHost().getName()));
                 }
             }
             return out;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
             return new ServiceInfoImpl(this.getQualifiedNameMap(), _port, _weight, _priority, persistent, _server);
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceEvent(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         public ServiceEvent getServiceEvent(JmDNSImpl dns) {
             ServiceInfo info = this.getServiceInfo(false);
             ((ServiceInfoImpl) info).setDns(dns);
             // String domainName = "";
             // String serviceName = this.getServer();
             // int index = serviceName.indexOf('.');
             // if (index > 0)
             // {
             // serviceName = this.getServer().substring(0, index);
             // if (index + 1 < this.getServer().length())
             // domainName = this.getServer().substring(index + 1);
             // }
             // return new ServiceEventImpl(dns, domainName, serviceName, info);
             return new ServiceEventImpl(dns, info.getType(), info.getName(), info);
 
         }
 
         /*
          * (non-Javadoc)
          * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
          */
         @Override
         protected void toString(StringBuilder aLog) {
             super.toString(aLog);
             aLog.append(" server: '" + _server + ":" + _port + "'");
         }
 
     }
 
     public static class HostInformation extends DNSRecord {
         String _os;
         String _cpu;
 
         /**
          * @param name
          * @param recordClass
          * @param unique
          * @param ttl
          * @param cpu
          * @param os
          */
         public HostInformation(String name, DNSRecordClass recordClass, boolean unique, int ttl, String cpu, String os) {
             super(name, DNSRecordType.TYPE_HINFO, recordClass, unique, ttl);
             _cpu = cpu;
             _os = os;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#addAnswer(javax.jmdns.impl.JmDNSImpl, javax.jmdns.impl.DNSIncoming, java.net.InetAddress, int, javax.jmdns.impl.DNSOutgoing)
          */
         @Override
         DNSOutgoing addAnswer(JmDNSImpl dns, DNSIncoming in, InetAddress addr, int port, DNSOutgoing out) throws IOException {
             return out;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#handleQuery(javax.jmdns.impl.JmDNSImpl, long)
          */
         @Override
         boolean handleQuery(JmDNSImpl dns, long expirationTime) {
             return false;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#handleResponse(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         boolean handleResponse(JmDNSImpl dns) {
             return false;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#sameValue(javax.jmdns.impl.DNSRecord)
          */
         @Override
         boolean sameValue(DNSRecord other) {
             if (! (other instanceof HostInformation) ) {
                 return false;
             }
             HostInformation hinfo = (HostInformation) other;
             if ((_cpu == null) && (hinfo._cpu != null)) {
                 return false;
             }
             if ((_os == null) && (hinfo._os != null)) {
                 return false;
             }
             return _cpu.equals(hinfo._cpu) && _os.equals(hinfo._os);
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#isSingleValued()
          */
         @Override
         public boolean isSingleValued() {
             return true;
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#write(javax.jmdns.impl.DNSOutgoing)
          */
         @Override
         void write(MessageOutputStream out) {
             String hostInfo = _cpu + " " + _os;
             out.writeUTF(hostInfo, 0, hostInfo.length());
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceInfo(boolean)
          */
         @Override
         public ServiceInfo getServiceInfo(boolean persistent) {
             Map<String, String> hinfo = new HashMap<String, String>(2);
             hinfo.put("cpu", _cpu);
             hinfo.put("os", _os);
             return new ServiceInfoImpl(this.getQualifiedNameMap(), 0, 0, 0, persistent, hinfo);
         }
 
         /*
          * (non-Javadoc)
          * @see javax.jmdns.impl.DNSRecord#getServiceEvent(javax.jmdns.impl.JmDNSImpl)
          */
         @Override
         public ServiceEvent getServiceEvent(JmDNSImpl dns) {
             ServiceInfo info = this.getServiceInfo(false);
             ((ServiceInfoImpl) info).setDns(dns);
             return new ServiceEventImpl(dns, info.getType(), info.getName(), info);
         }
 
         /*
          * (non-Javadoc)
          * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
          */
         @Override
         protected void toString(StringBuilder aLog) {
             super.toString(aLog);
             aLog.append(" cpu: '" + _cpu + "' os: '" + _os + "'");
         }
 
     }
 
     /**
      * Determine if a record can have multiple values in the cache.
      *
      * @return <code>false</code> if this record can have multiple values in the cache, <code>true</code> otherwise.
      */
     public abstract boolean isSingleValued();
 
     /**
      * Return a service information associated with that record if appropriate.
      *
      * @return service information
      */
     public ServiceInfo getServiceInfo() {
         return this.getServiceInfo(false);
     }
 
     /**
      * Return a service information associated with that record if appropriate.
      *
      * @param persistent
      *            if <code>true</code> ServiceListener.resolveService will be called whenever new new information is received.
      * @return service information
      */
     public abstract ServiceInfo getServiceInfo(boolean persistent);
 
     /**
      * Creates and return a service event for this record.
      *
      * @param dns
      *            DNS serviced by this event
      * @return service event
      */
     public abstract ServiceEvent getServiceEvent(JmDNSImpl dns);
 
     public void setRecordSource(InetAddress source) {
         this._source = source;
     }
 
     public InetAddress getRecordSource() {
         return _source;
     }
 
     /*
      * (non-Javadoc)
      * @see com.webobjects.discoveryservices.DNSRecord#toString(java.lang.StringBuilder)
      */
     @Override
     protected void toString(StringBuilder aLog) {
         super.toString(aLog);
         aLog.append(" ttl: '" + getRemainingTTL(System.currentTimeMillis()) + "/" + _ttl + "'");
     }
 
     public void setTTL(int ttl) {
         this._ttl = ttl;
     }
 
     public int getTTL() {
         return _ttl;
     }
 }