sockets within a kernel module

wizumwalt · 09-19-2009, 07:32 PM

Trying to learn the kernel ... when a user opens a socket (using an application protocol I want to make) and streams data to it, I want to be able to read that within a kernel module, add a few fields to it, then put it on UDP from within the kernel module.

But I'm not clear on if I would be interrupting system calls or how that would work? Can anyone point me to how this would be done, tutorials, anything?

Thanks,

jhwilliams · 09-19-2009, 08:04 PM

This doesn't sound like stuff you'd want to do in the kernel, really -- socket programming, et al is more of a user space thing. This might be of interest for you, in case you haven't seen something along these lines: http://www.linuxjournal.com/article/7660

wizumwalt · 09-19-2009, 10:05 PM

Quote:

Originally Posted by jhwilliams

This doesn't sound like stuff you'd want to do in the kernel, really -- socket programming, et al is more of a user space thing. This might be of interest for you, in case you haven't seen something along these lines: http://www.linuxjournal.com/article/7660

Maybe I explained that wrong. I want to use sockets as one normally would in user space. And the data coming from these user space sockets I want to wrap up in my own application layer protocol (inside a kernel module) and have it depend on another kernel module like UDP. That's a very normal thing. NFS does this as well, but I'm having a hard time following NFS and was looking for something more basic.

I think your post will help. Thanks,