TCP/IP kernel stack bypassing



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Joined: Tue Apr 24, 2012 7:41 am

Post Sun Nov 04, 2012 10:14 pm

TCP/IP kernel stack bypassing

Hi forum,

I am trying to write a port scanner using JPCAP library in Java, the thing is and before I go deeper into coding. I wanted to do some research on how can a programmer handle the packet instead of the tcp/ip stack on kernel. I mean I can just write the program without knowing what is happening at the back end which is not satisfying for me. I am a little confused about this topic. As far as I know is that kernel is responsible for building, sending and receiving a packet, but a programmer can bypass the kernel packet's handling and take control of sending/modifying packets.
So for instance when I write a program that can access the IP layer, with the ability of building up the packet + modifying it and what not. This just means that my program did bypass the kernel.. how does that happen?
Can someone guide me or mention a good recourse on this.

Note: I know how to write a program that can craft a packet I just need to do some researches on what happens at the back-end.
FYI: JPCAP is a library based on libpcap/winpcap

Last edited by ZeroOne on Sun Nov 04, 2012 10:16 pm, edited 1 time in total.



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Location: Mile High City

Post Sun Nov 04, 2012 10:49 pm

Re: TCP/IP kernel stack bypassing

It sounds like you're just looking for general direction, so I'd recommend that you start by researching the difference between raw sockets and standard sockets.
The day you stop learning is the day you start becoming obsolete.

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