jpcap funtions

[barnaba]

hi there !!! please any one i need help in this, jpcap has a function to get packet length i want to know how can i get the packet size in term of bytes ?

[Tolls]

Do you have a sample of what you've got so far?

I'm not sure where your issue is, as the Packet class has a getData method that returns a byte[].

[barnaba]

i don have so far but my point was to get a means to access packet size that i can term size as bandwidth consumption in my application

[barnaba]

hello !!!!!
when i run this code using java netbeans 8.1 version

package mybreath;
import jpcap.JpcapCaptor;
import jpcap.NetworkInterface;
public class Mybreath {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
NetworkInterface[] arr;
NetworkInterface nic;
arr = JpcapCaptor.getDeviceList();
for(int i=0; i<arr.length; i++){
cbox1.addItem(arr[i].description);
}
}

}

gives me this error

Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: no jpcap in java.library.path

i have installed java netbeans 7.2 and 8.1 versions

what can do to remove the error??

[SurfMan]

Sounds like you have a missing jpcap.dll in your path.

https://duckduckgo.com/?q=java.lang....a.library.path

[barnaba]

thanks Tolls your solution work but it didn't solve my problem what i need is how can i get exactly packet size such as kilobytes, megabytes and so forth ? i decided to use jpcap library to capture the packets .

[barnaba]

in my application i has used jpcap library to capture the packet , i failed to get the data in the packet i used getData() function in a class Packet that return the byte[] when i convert the byte[] to string, the string information returned was encrypted how to decrypt that string to plain text ? and i don know which algorithms was used to encrypt the raw data in the packet

[Tolls]

If you don't know how it was encrypted then you're probably not going to have much success decrypting it.

As for packet size, I would assume that's closest to the number of header bytes plus the number of data bytes.
That would at least be a start point.
Depends on the message possibly?