vicdurai / java-router Goto Github PK

Hi Alan,

No issue, this is the only way I find to reach out to you.

My name is Henning Els and I have taken an interest in the work you have done 
in java-router.  Very impressive!  I am learning how the mechanics of 
networking and routing work and find your work to be very concise, to the point 
and easy to understand.

Could you spare me a moment and let me know why you chose to wrap 
EthernetPacket as a member of IPPacket, instead of extending IPPacket from 
EthernetPacket?  This seems natural as IPPacket is also an EthernetPacket, and 
adds its own header.

My guess is that you felt that IPPacket *is not* an EthernetPacket, or perhaps 
that was needed for the way the classes are laid out.

I see you have the same approach for EthernetIPSupport wrapping EthernetPort, 
instead of extending it.

Any brief description will be helpful to send me in the right direction.

Thanks!