Question

Finding port number for incoming request

Asked by: praveen_bakare

Does any one know the way to find how many applications are calling my application ?
I mean I want to find the IP addresses + Port no of the machines from which the request for my application is coming.
This has to be in java.
I have written the following code in java…..

Enumeration e = NetworkInterface.getNetworkInterfaces();
while(e.hasMoreElements())
{
            NetworkInterface netface = (NetworkInterface) e.nextElement();
            Enumeration e2 = netface.getInetAddresses();
            while (e2.hasMoreElements())
            {
                        InetAddress ip = (InetAddress) e2.nextElement();
                        if(!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":")==-1)
                        {
                                    byte[] ipAddr = ip.getAddress();
                                    System.out.println("Host Name :  " + ip.getHostName());
                                    localip[0]=(ipAddr[0]&0xFF);
                                    localip[1]=(ipAddr[1]&0xFF);
                                    localip[2]=(ipAddr[2]&0xFF);
                                    localip[3]=(ipAddr[3]&0xFF);      
                                    System.out.println("IP Address is : " + localip[0] + "." + localip[1] + "." + localip[2] + "." + localip[3]);
                        }
            }
}

This gives me the IP addresses n the hostnames of all the remote machines.
But how to get the remote port no ???

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Asked On
2006-01-29 at 23:22:10ID21715041
Topics

Miscellaneous Programming

,

Java Servlets

Participating Experts
1
Points
50
Comments
7

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Answers

 

by: Giant2Posted on 2006-01-30 at 03:04:17ID: 15822522

>Does any one know the way to find how many applications are calling my application ?
In your servlet use a static counter.
Each time your servlet is called it increment this static variable.

>But how to get the remote port no ???
Your servlet is on a webserver. The port the servlet answer is only 80 (or 8080 ot other defined in the configuration parameters).
The remote port nr. is known only by the remote machine.

 

by: Giant2Posted on 2006-01-30 at 03:05:31ID: 15822527

Is your application running on a webserver? (Tomcat/Apache)

 

by: praveen_bakarePosted on 2006-01-30 at 03:43:48ID: 15822730

But the problem is I am using only RMI, no Servlets or JSPs.

 

by: Giant2Posted on 2006-01-30 at 03:47:56ID: 15822762

Ok. So you can see from RMI.

 

by: Giant2Posted on 2006-01-30 at 03:51:01ID: 15822783

 

by: Giant2Posted on 2006-01-30 at 04:09:51ID: 15822892

In the SecurityManager you can put this:
        public synchronized void checkConnect(String host,int port){
          Calendar cal=Calendar.getInstance();
          System.out.println("CheckConnect for "+host+" at port "+port+" on "+cal.getTime());
          super.checkConnect(host,port);
          }
        public synchronized void checkConnect(String host,int port, Object context){
          Calendar cal=Calendar.getInstance();
          System.out.println("CheckConnect for "+host+" at port "+port+" with context "+context+" on "+cal.getTime());
          super.checkConnect(host,port,context);
          }

 

by: Giant2Posted on 2006-02-10 at 03:11:18ID: 15920971

Tx accepting, but why grade B?

20120131-EE-VQP-002

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