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From Gupta Bharat <bharat.gu...@scania.com>
Subject RE: ActiveMQ custom plugin
Date Tue, 12 Dec 2017 08:30:51 GMT
hello again,

I am asking my question here again if you can possibly help me with a method.

1. Need to intercept the Incoming connections from MQTT clients.
User is connecting to activemq broker by hitting on url and sending a TOKEN [(hostname:port)
+ token]
 
How can we intercept the connections and validate the token sent by mqtt client?

I have my own custom plugin that will validate the token. Just Need to know method on which
we can call that Plugin.

Also do we have to use Artemis here to achieve this?

Thanks In Advance 

Regards,
Bharat Gupta
Development & Support | Platform Technician, IXCB | Scania IT
Mobile: +46700869007, +91-9718483802
bharat.gupta@scania.com

-----Original Message-----
From: tbain98@gmail.com [mailto:tbain98@gmail.com] On Behalf Of Tim Bain
Sent: Tuesday, December 5, 2017 7:29 PM
To: ActiveMQ Users <users@activemq.apache.org>
Cc: users-owner@activemq.apache.org
Subject: RE: ActiveMQ custom plugin

I'd suggest that you store your cache of known credentials in your plugin.
I'm not sure that you'd have access to the web session from a plugin,
because that's MQTT-specific, so I think your best bet would be to store it
in a Map (better: a Guava cache, so you get free age-off behavior) within
your plugin.

Tim

On Dec 5, 2017 3:50 AM, "Gupta Bharat" <bharat.gupta@scania.com> wrote:

> Hi Tim,
>
> I am having a scenario here. Using custom plugin I am validating my JWT
> tokens and fetching the claims from it.
>
> Claims:
>
> {
>   "unique_name": "gubhpi",
>   "sub": "gubhpi",
>   "kid": "1d884b7a-88ce-40e7-9bb8-f5e8f6b5837d",
>   "ExternalStaffReference": "0a8395d7-50b5-4cd8-ac68-6213da955f1c",
>   "ExternalCustomerReference": "acab53e8-a134-4bb8-a66d-3e80430ec4d1",
>   "AdAccount": "bguvvw",
>   "FunctionalPermissions": "490879",
>   "UserPermissions": [
>     "2482503678",
>     "1006"
>   ],
>   "iss": "https://xyz/",
>   "aud": "58b99b37-db1c78d7fef5",
>   "exp": 1510240047,
>   "nbf": 1510236447
> }
>
> From this I need to fetch "AdAccount": "bguvvw", and store it
> somewhere(please suggest me-- context or session) and when next time user
> sends me message on activemq using mqtt or web socket I need to check the
> message header with the users stored in contextsession or from some object.
> If user is present then we validate else we don’t.
>
>
> Regards,
> Bharat Gupta
> Development & Support | Platform Technician, IXCB | Scania IT
> Mobile: +46700869007, +91-9718483802
> bharat.gupta@scania.com
>
> -----Original Message-----
> From: tbain98@gmail.com [mailto:tbain98@gmail.com] On Behalf Of Tim Bain
> Sent: den 29 november 2017 04:20
> To: ActiveMQ Users <users@activemq.apache.org>
> Cc: users-owner@activemq.apache.org
> Subject: RE: ActiveMQ custom plugin
>
> On Nov 28, 2017 8:37 AM, "Gupta Bharat" <bharat.gupta@scania.com> wrote:
>
> Hello Tim,
>
> Thank you for your help. :)
>
> I have used below method to fetch that text from message when client
> publish on topic and it works.
>
> public void send(ProducerBrokerExchange producerExchange, Message
> messageSend) throws Exception {
> byte[] msg = ((ActiveMQMessage) messageSend).getContent().data;
>
>
> ((ActiveMQTextMessage)messageSend).getText()
> It returns the text from web console only.
>
>
> Really appreciate your help here. :)
>
>
>
> Great, I'm glad I've been able to help.
>
> ------------------------------------------------------------
> ------------------------------------------------------------
> ------------------------------------------------------------
> -----------------------
>
> Apart from this I have a situation here that when I try to execute below
> code:
> 1. Destination dest = session.createQueue("JWT_PAYLOAD"); ---- it is
> creating a queue
> 2. TextMessage claims = session.createTextMessage(payload); --- converting
> the string to message to send it on above made queue
> 3. producer.send(dest, claims); --- send the message on
> ActiveMQ.Advisory.Producer.Queue.JWT_PAYLOAD instead of queue JWT_PAYLOAD
> why?
>
>
> What makes you think that this message on an advisory topic was your
> message instead of a standard advisory message that's sent anytime a
> non-anonymous producer sends a message? What makes you think that thos
> message was sent instead of the message you sent to your queue, rather than
> sent *in addition to* the message on your queue? Can you share
> before-and-after screenshots of your queue's row on the Queues page of the
> web console? And were there any warnings or errors logged in the broker's
> logs when this happened?
>
> 4. Before executing producer.send(dest, claims); ----- it is going on
> byte[] msg = ((ActiveMQMessage) messageSend).getContent().data and
> returning null as it is again checking for Content and data. So my ques is
> why it is going back again on first line? Why it is not simply putting the
> data on queue?
>
>
> I didn't understand what you meant by "it is going back again on first
> line." Are you saying that the broker is putting the original message onto
> your topic? If so, that's because by calling super.send(), you're allowing
> the publishing of the original message to the original topic to continue. I
> advised you to do that because I didn't realize that you wanted to
> transform the message and publish it to a different destination, but since
> it seems like you do, I think you don't want to call super.send() after
> all.
>
> If that's not what you meant, then please help me to better understand your
> question.
>
> @Override
>         public void send(ProducerBrokerExchange producerExchange, Message
> messageSend) throws Exception {
> if(messageSend != null)
> {
>         if(messageSend.getContent() != null)
> {
>         =               byte[] msg = ((ActiveMQMessage)
> messageSend).getContent().data;
>
>                 String message = new String(msg);
>                 logger.warn("messageBody::::::::::::::::              " +
> message);
>
>                 DecodedJWT jwt = JWT.decode(message);
>                 byte[] contentBytes = String.format("%s.%s",
> jwt.getHeader(), jwt.getPayload())
>                                 .getBytes(StandardCharsets.UTF_8);
>                 byte[] signatureBytes = Base64.decodeBase64(jwt.
> getSignature());
>                 String publicKeyPEM = "-----BEGIN PUBLIC KEY-----\n"
>                                 + "please enter your key"
>                                 + "-----END PUBLIC KEY-----";
>
>                 RsaKeyUtil rsaKeyUtil = new RsaKeyUtil();
>                 PublicKey pk = rsaKeyUtil.fromPemEncoded(publicKeyPEM);
>
>                 Security.addProvider(new BouncyCastleProvider());
>                 Signature signatureInstance =
> Signature.getInstance("SHA256withRSA",
> "BC");
>                 signatureInstance.initVerify(pk);
>                 signatureInstance.update(contentBytes);
>                 boolean result = signatureInstance.verify(signatureBytes);
>
>                 byte[] pload = Base64.decodeBase64(jwt.getPayload());
>
>                 String payload = new String(pload);
>                 logger.warn("messageBody::::::::::::::::              " +
> payload);
>                 logger.warn("result::::::::::::::::              " +
> result);
>                 if (result = true) {
>
>                         // Create a ConnectionFactory
>             ActiveMQConnectionFactory connectionFactory = new
> ActiveMQConnectionFactory("vm://localhost");
>
>             // Create a Connection
>             javax.jms.Connection jmsConnection = connectionFactory.
> createConnection();
>             jmsConnection.start();
>
>             // Create a Session
>             Session session = jmsConnection.createSession(false,
> Session.AUTO_ACKNOWLEDGE);
>
>                 Destination dest = session.createQueue("JWT_PAYLOAD");
>                         MessageProducer producer =
> session.createProducer(dest);
>                         producer.setDeliveryMode(DeliveryMode.PERSISTENT);
>
>                         TextMessage claims = session.createTextMessage(
> payload);
>                         claims.setJMSType("TEXT");
>                         logger.warn("CLAIMS>>>>>>>>>>>>>>>>
 " + claims);
>                         producer.send(dest, claims);
>                         logger.fatal("CLAIMS>>>>>>>>>>>>>>>>
 " + claims);
>
>
> //
>                         MessageConsumer consumer =
> session.createConsumer(dest);
>                         consumer.setMessageListener(this);
>
>                 }
>
>                 else {
>
>                         logger.warn("Else Authentication failed. Please
> send Valid Token");
>                 }
>
>                 super.send(producerExchange, messageSend);
>                 // getNext().send(producerExchange, messageSend);
>
>         }
>
>         else
>         {
>                 logger.fatal("MESSAGE SEND CONTENT IS NULL");
>         }
>         }
> else
> {
>         logger.fatal("MESSAGE SEND IS NULL");
> }
>         }
>
>         @Override
>         public void onMessage(javax.jms.Message message) {
>                   String messageText = null;
>                 try {
>                     if (message instanceof TextMessage) {
>                         TextMessage textMessage = (TextMessage) message;
>                         messageText = textMessage.getText();
>                         System.out.println("messageText = " +
> messageText);
>                     }
>                 } catch (JMSException e) {
>                     //Handle the exception appropriately
>                 }
>         }
>
> Regards,
> Bharat Gupta
> Development & Support | Platform Technician, IXCB | Scania IT
> Mobile: +46700869007, +91-9718483802
> bharat.gupta@scania.com
>
> -----Original Message-----
> From: tbain98@gmail.com [mailto:tbain98@gmail.com] On Behalf Of Tim Bain
> Sent: den 27 november 2017 08:12
> To: ActiveMQ Users <users@activemq.apache.org>
> Cc: users-owner@activemq.apache.org
> Subject: Re: ActiveMQ custom plugin
>
> Thank you for providing that code. I spent some time running your code, and
> found the following problems with it, which are causing this to not work as
> you intended:
>
>    1. The signature for the send() method is "public void
>    send(ProducerBrokerExchange producerExchange, Message messageSend)
> throws
>    Exception," not the signature you had defined. Because your signature
>    didn't match the method you were trying to override, you weren't
> actually
>    overriding a method that would be called when a message was sent, but
>    instead you were simply defining a public method that nothing ever
> called.
>    The compiler would have caught this for you if you'd annotated the
> method
>    as @Override; you should be using that annotation for all overriden
>    methods, for exactly this reason.
>    2. messageSend.getContent() returns null for the test message I sent via
>    the web console, but ((ActiveMQTextMessage)messageSend).getText()
> returns
>    the body. I think this same code would work for an MQTT message, but
> since
>    I've never used MQTT you'll need to confirm that.
>    3. I mentioned this earlier, but your send() method needs to call
>    super.send() at the end, otherwise the broker's not going to process any
>    messages and you're going to be wondering why the broker "doesn't work."
>    This doesn't explain why you're not seeing your logging occur, but once
> we
>    get past that problem, this is the next issue you're going to hit.
>
> Tim
>
> On Sun, Nov 26, 2017 at 12:41 PM, Gupta Bharat <bharat.gupta@scania.com>
> wrote:
>
> > Hello,
> >
> > MyBroker.java
> >
> > package jwt.validation;
> >
> > import java.util.HashMap;
> > import java.util.Map;
> >
> > import javax.jms.Destination;
> > import javax.jms.ExceptionListener;
> > import javax.jms.JMSException;
> > import javax.jms.MessageConsumer;
> > import javax.jms.Session;
> > import javax.jms.TextMessage;
> >
> > import org.apache.activemq.ActiveMQConnection;
> > import org.apache.activemq.ActiveMQConnectionFactory;
> > import org.apache.activemq.ActiveMQMessageConsumer;
> > import org.apache.activemq.broker.BrokerFilter;
> > import org.apache.activemq.broker.Connection;
> > import org.apache.activemq.broker.ConnectionContext;
> > import org.apache.activemq.broker.ProducerBrokerExchange;
> > import org.apache.activemq.broker.region.Subscription;
> > import org.apache.activemq.command.ActiveMQDestination;
> > import org.apache.activemq.command.ActiveMQMessage;
> > import org.apache.activemq.command.ConnectionInfo;
> > import org.apache.activemq.command.ConsumerInfo;
> > import org.apache.activemq.command.Message;
> > import org.apache.activemq.command.SessionInfo;
> > import org.apache.log4j.Logger;
> >
> >
> > public class MyBroker extends BrokerFilter {
> >
> >                 final static Logger logger = Logger.getLogger(MyBroker.
> > class);
> >                 private Map<String, String> userMap = new HashMap<String,
> > String>();
> >
> >                 public MyBroker(org.apache.activemq.broker.Broker next)
> {
> >                                 super(next);
> >
> >                 }
> >
> >
> >
> >                 public void send(ProducerBrokerExchange producerExchange,
> > ActiveMQMessage messageSend) throws JMSException
> >                 {
> >                                   byte[] messageBytes =
> > messageSend.getContent().data;
> >
> >                                   Message data =
> messageSend.getMessage();
> >                                   logger.warn("
> MESSAGEEEEEEEEEEEEEEEEEEEEE"
> > + data);
> >                                   String message = new
> > String(messageBytes);
> >                                   logger.warn("messageBody" + message);
> >                                   logger.info("messageBody" + message);
> >                                   logger.fatal("messageBody" + message);
> >                                   logger.debug("messageBody" + message);
> >
> >
> >                  }
> >
> >                 public void addConnection(ConnectionContext context,
> > ConnectionInfo info)
> >             throws Exception {
> >
> >                                 info.getUserName();
> >                                 info.toString();
> >
> >
> >                                 logger.warn("info1" +
> info.getUserName());
> >                                 logger.fatal("info2" + info.toString());
> >
> >        String token = context.getUserName();
> >        logger.debug("token1" + token);
> >        logger.warn("token2" + token);
> >        logger.fatal("token3" + token);
> >
> >
> >         // Then call your parent
> >         super.addConnection(context, info);
> >     }
> >
> >     public Subscription addConsumer(ConnectionContext context,
> > ConsumerInfo info) throws Exception {
> >
> >
> >
> >         ActiveMQDestination dest = info.getDestination();
> >         Connection conn = context.getConnection();
> >         if (dest != null) {
> >             String destName = info.getDestination().getPhysicalName();
> >             String clientId = context.getClientId();
> >             String allowedDest = userMap.get(clientId);
> >
> >             logger.info(">>> Got Consumer Add request { Destination: "
+
> > destName
> >                     + ", Remote Address: " + conn.getRemoteAddress()
> >                     + ", ClientID: " + clientId
> >                     + " }");
> >             if (allowedDest != null && (allowedDest.equals("*") ||
> > allowedDest.equals(destName) || destName.startsWith("ActiveMQ"))) {
> >                 logger.info(">>> Subscription allowed");
> >             } else {
> >                 logger.error(">>> Destination not allowed. Subscription
> > denied!");
> >                 throw new Exception(">>> Subscription denied!");
> >             }
> >         } else {
> >             logger.error("<<< Got Consumer Add request from Remote
> > Address:" + conn.getRemoteAddress() + ". But destination is NULL.");
> >         }
> >         return super.addConsumer(context, info);
> >     }
> > }
> >
> > Sample.java
> >
> > package jwt.validation;
> >
> > import org.apache.activemq.ActiveMQMessageProducer;
> > import org.apache.activemq.broker.Broker;
> > import org.apache.activemq.broker.BrokerPlugin;
> > import org.apache.log4j.Logger;
> >
> > public class Sample  implements BrokerPlugin {
> >
> >                 final static Logger logger =
> Logger.getLogger(Sample.class)
> > ;
> >
> >                 public static void main(String[] args) {
> >
> >
> >                 }
> >
> >                 private void runMe(String parameter){
> >
> >                                 if(logger.isDebugEnabled()){
> >                                                 logger.debug("This is
> > debug : " + parameter);
> >                                 }
> >
> >                                 if(logger.isInfoEnabled()){
> >                                                 logger.info("This is
> info
> > : " + parameter);
> >                                 }
> >
> >                                 logger.warn("This is warn : " +
> parameter);
> >                                 logger.error("This is error : " +
> > parameter);
> >                                 logger.fatal("This is fatal : " +
> > parameter);
> >
> >                 }
> >
> >                 public Broker installPlugin(Broker broker) throws
> > Exception {
> >                                 Sample sample = new Sample();
> >                                 sample.runMe("ActiveMQ Hello");
> >
> >                                 return new MyBroker(broker);
> >                 }
> >
> >
> > }
> >
> > The above are two classes I have implemented for my custom plugin.
> >
> > Regards,
> > Bharat Gupta
> > Development & Support | Platform Technician, IXCB | Scania IT
> > Mobile: +46700869007, +91-9718483802
> > bharat.gupta@scania.com<mailto:bharat.gupta@scania.com>
> >
> > From: tbain98@gmail.com [mailto:tbain98@gmail.com] On Behalf Of Tim Bain
> > Sent: Sunday, November 26, 2017 4:31 AM
> > To: ActiveMQ Users <users@activemq.apache.org>
> > Cc: users-owner@activemq.apache.org
> > Subject: RE: ActiveMQ custom plugin
> >
> >
> >
> > On Nov 24, 2017 5:44 PM, "Gupta Bharat" <bharat.gupta@scania.com<mailto:
> > bharat.gupta@scania.com>> wrote:
> >
> > hello Tim,
> >
> >
> >
> > My Custom Plugin is getting installed as I am using log4j to print random
> > stuff and its getting printed in logs.
> > Can you please describe in more detail exactly what methods that logging
> > is done in and how it proves that the plugin was actually installed? If
> > (for example) your logging is only in your constructor or your
> > initialization method, that just proves that Spring made your bean, not
> > that it was installed in the broker as a plugin.
> >
> > I am hereby attaching my codes that you can see.
> > Where? All I see is your activemq.xml snippet below, but no actual code
> > for your plugin.
> >
> > activemq.xml configurations:
> >
> > <plugins>
> >
> >                                <bean id="sample"
> >
> >                                 class="jwt.validation.Sample"
> >
> >                                 xmlns="http://www.
> > springframework.org/schema/beans"/>
> >
> >                                </plugins>
> >
> >
> >
> > Also I would like to explain you my exact requirement.
> >
> >
> >
> > The diagram below shows what I am trying to do it now.
> >
> >
> >
> >
> >
> > [cid:image001.png@01D3658E.4A6B3E20]
> > That sounds like it should be doable via an interceptor based on what I
> > know about them (i.e. the wiki, but no hands-on experience).
> >
> > QUESTIONS:
> >
> >
> >
> > 1.       how can we provide JWT to custom plugin from client?
> > If you have to use MQTT, you'll need to encode it directly into the
> > message body, because that's all MQTT supports. You could for example
> make
> > a JSON payload with two fields: the JWT and the message body. Or you
> could
> > switch to OpenWire and put the JWT into a custom header on the message
> the
> > client is sending.
> >
> > 2.       do we need to store jwt in topic first and then consume it from
> > topic to validate it? (not idle case)
> > You need to put the JWT into the message itself so that your plugin can
> > evaluate the token and then decide what to do with the message based on
> > that evaluation.
> >
> > 3.       can we call restful service from activeMQ broker that can
> > validate token and gives the result back to broker?
> > Yes, as far as I know, you'd be able to do that from within the broker.
> > (I've never done that, but I'm not aware of anything that would prevent
> you
> > from doing it.)
> >
> > Tim please let me know if I am clear with my requirements. Else we can
> > talk more on call/phone.
> >
> >
> >
> > Thanks in advance
> >
> >
> >
> >
> >
> > Regards,
> >
> > Bharat Gupta
> >
> > Development & Support | Platform Technician, IXCB | Scania IT
> >
> > Mobile: +46700869007<tel:+46%2070%20086%2090%2007>, +91-9718483802
> > <tel:+91%2097184%2083802>
> >
> > bharat.gupta@scania.com<mailto:bharat.gupta@scania.com>
> >
> >
> >
> >
> > -----Original Message-----
> > From: tbain98@gmail.com<mailto:tbain98@gmail.com> [mailto:
> > tbain98@gmail.com<mailto:tbain98@gmail.com>] On Behalf Of Tim Bain
> > Sent: Friday, November 24, 2017 7:19 PM
> > To: ActiveMQ Users <users@activemq.apache.org<mailto:
> > users@activemq.apache.org>>
> > Cc: users-owner@activemq.apache.org<mailto:users-owner@
> activemq.apache.org
> > >
> > Subject: RE: ActiveMQ custom plugin
> >
> >
> >
> > 1. Your send() method needs to call super.send() after doing your custom
> >
> > work, otherwise the message will never be sent to the real Broker object.
> >
> > Please review the wiki page I referred to earlier, which covers how to
> >
> > implement an interceptor.
> >
> >
> >
> > 2. To me it sounds like your plugin isn't getting installed. Do you have
> >
> > any indication that it is, from logs or some other mechanism? And can you
> >
> > please share the code of the class that implements BrokerPlugin, to
> confirm
> >
> > that your installPlugin() method looks right, and the XML block where you
> >
> > create the plugin bean?
> >
> >
> >
> > Tim
> >
> >
> >
> > On Nov 24, 2017 8:39 AM, "Gupta Bharat" <bharat.gupta@scania.com<mailto:
> > bharat.gupta@scania.com>> wrote:
> >
> >
> >
> > > Hello,
> >
> > >
> >
> > > I tried implementing the method as below:
> >
> > >
> >
> > >         public void send(ProducerBrokerExchange producerExchange,
> >
> > > ActiveMQMessage messageSend) throws JMSException
> >
> > >          {
> >
> > >                   byte[] messageBytes = messageSend.getContent().data;
> >
> > >                   String message = new String(messageBytes);
> >
> > >                   logger.info<http://logger.info>("messageBody" +
> > message);
> >
> > >         }
> >
> > >
> >
> > > Also I am publishing a message on a topic even though this send()
> method
> >
> > > is not been called as logger.info<http://logger.info> is not getting
> > printed in my Custom
> >
> > > Plugin.
> >
> > >
> >
> > > Could you please help me on this?
> >
> > >
> >
> > > Regards,
> >
> > > Bharat Gupta
> >
> > > Development & Support | Platform Technician, IXCB | Scania IT
> >
> > > Mobile: +46700869007<tel:+46%2070%20086%2090%2007>, +91-9718483802
> > <tel:+91%2097184%2083802>
> >
> > > bharat.gupta@scania.com<mailto:bharat.gupta@scania.com>
> >
> > >
> >
> > >
> >
> > > -----Original Message-----
> >
> > > From: tbain98@gmail.com<mailto:tbain98@gmail.com> [mailto:
> > tbain98@gmail.com] On Behalf Of Tim Bain
> >
> > > Sent: Friday, November 24, 2017 7:15 PM
> >
> > > To: ActiveMQ Users <users@activemq.apache.org<mailto:
> > users@activemq.apache.org>>
> >
> > > Cc: users-owner@activemq.apache.org<mailto:users-owner@
> > activemq.apache.org>
> >
> > > Subject: Re: ActiveMQ custom plugin
> >
> > >
> >
> > > As I said in your other thread, you would do that by implementing code
> in
> >
> > > the send() method of your subclass of BrokerFilter, which you would
> > create
> >
> > > and return in your installPlugin() method.
> >
> > >
> >
> > > Tim
> >
> > >
> >
> > > On Nov 24, 2017 3:51 AM, "Gupta Bharat" <bharat.gupta@scania.com<
> mailto:
> > bharat.gupta@scania.com>> wrote:
> >
> > >
> >
> > > Hello,
> >
> > >
> >
> > > I have a scenario as follows:
> >
> > >
> >
> > >
> >
> > > 1.       I have Custom Plugins that decrypts the data and validates it.
> >
> > >
> >
> > > 2.       I am getting Encrypted data (token) from user that need to be
> >
> > > decrypted on custom plugin.
> >
> > >
> >
> > > 3.       Client is accessing the broker using mqtt protocol
> >
> > >
> >
> > > Need Solution for the following:
> >
> > >
> >
> > > 1.       Before getting data onto topic on ACtiveMQ broker I need to
> >
> > > validate the  data(token) in my custom plugin
> >
> > >
> >
> > > 2.       How to extract a data what customer is sending? So that I can
> >
> > > extract the data, decrypt the message and validate.
> >
> > >
> >
> > >
> >
> > > Implementation so far:
> >
> > >
> >
> > > 1.       Custom Plugin is ready and JAR has been added in
> <ActiveMQ>/libs
> >
> > >
> >
> > > 2.       Added the plugin configuration in activemq.xml
> >
> > >
> >
> > >
> >
> > > Could anyone help me with a solution for the same as it's critical
> case.
> >
> > >
> >
> > > Thank you In Advance
> >
> > >
> >
> > > Regards,
> >
> > > Bharat Gupta
> >
> > > Development & Support | Platform Technician, IXCB | Scania IT
> >
> > > Mobile: +46700869007<tel:+46%2070%20086%2090%2007>, +91-9718483802
> > <tel:+91%2097184%2083802>
> >
> > > bharat.gupta@scania.com<mailto:bharat.gupta@scania.com<mailto:
> > bharat.gupta@scania.com%3cmailto:bharat.gupta@scania.com>>
> >
> > >
> >
> >
>
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