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* Playing with Network Stack
@ 2012-03-13 20:50 james jones
  2012-03-13 21:07 ` Jeff Haran
  2012-03-14  4:42 ` Sankalp Bagaria
  0 siblings, 2 replies; 6+ messages in thread
From: james jones @ 2012-03-13 20:50 UTC (permalink / raw)
  To: kernelnewbies

Greetings,

I hoping someone here can help point me in the right direction. I had an
idea for project, but I lack some of the know how. I was wonder if it might
be possible to have a kernel module or an application that can inspect
and mangle a packet before it gets routed? I don't want to just sniff the
traffic. I want to be able to look at the packet and then hand it back to
the network stack for processing. If so is there some reading or example
code I could look at?


Thanks in advance,

-James
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* Playing with Network Stack
  2012-03-13 20:50 Playing with Network Stack james jones
@ 2012-03-13 21:07 ` Jeff Haran
       [not found]   ` <CALcVfM2zdBJf4L7vnvaN8-rmhntM60_MfxvL7mdzj14k-VYvgQ@mail.gmail.com>
  2012-03-14  4:42 ` Sankalp Bagaria
  1 sibling, 1 reply; 6+ messages in thread
From: Jeff Haran @ 2012-03-13 21:07 UTC (permalink / raw)
  To: kernelnewbies



From: kernelnewbies-bounces+jharan=bytemobile.com@kernelnewbies.org [mailto:kernelnewbies-bounces+jharan=bytemobile.com at kernelnewbies.org] On Behalf Of james jones
Sent: Tuesday, March 13, 2012 1:50 PM
To: kernelnewbies at kernelnewbies.org
Subject: Playing with Network Stack

Greetings,

I hoping someone here can help point me in the right direction. I had an idea for project, but I lack some of the know how. I was wonder if it might be possible to have a kernel module or an application that can inspect and mangle a packet before it gets routed? I don't want to just sniff the traffic. I want to be able to look at the packet and then hand it back to the network stack for processing. If so is there some reading or example code I could look at?


Thanks in advance,

-James

You probably want to do a search on "netfilter hook".

Jeff Haran


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* Playing with Network Stack
  2012-03-13 20:50 Playing with Network Stack james jones
  2012-03-13 21:07 ` Jeff Haran
@ 2012-03-14  4:42 ` Sankalp Bagaria
  2012-03-14 17:45   ` james jones
  1 sibling, 1 reply; 6+ messages in thread
From: Sankalp Bagaria @ 2012-03-14  4:42 UTC (permalink / raw)
  To: kernelnewbies

You can try lipipq
http://linux.die.net/man/3/libipq

Regards,
Sankalp.
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* Playing with Network Stack
  2012-03-14  4:42 ` Sankalp Bagaria
@ 2012-03-14 17:45   ` james jones
  0 siblings, 0 replies; 6+ messages in thread
From: james jones @ 2012-03-14 17:45 UTC (permalink / raw)
  To: kernelnewbies

libipq will not give me what I want. I want this to be complete transparent
to the user space.

On Wed, Mar 14, 2012 at 12:42 AM, Sankalp Bagaria <sankalp.nitt@gmail.com>wrote:

>
> You can try lipipq
> http://linux.die.net/man/3/libipq
>
> Regards,
> Sankalp.
>
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* Playing with Network Stack
       [not found]     ` <471DE477E2B1F549A58F3A14A27180BE013CB4@HQ-EX01.bytemobile.com>
@ 2012-03-14 17:50       ` james jones
  2012-03-14 18:17         ` Jeff Haran
  0 siblings, 1 reply; 6+ messages in thread
From: james jones @ 2012-03-14 17:50 UTC (permalink / raw)
  To: kernelnewbies

Yep that is what I wanted. Here is another question. Is it ok to use
dynamic libs when linking modules?

On Tue, Mar 13, 2012 at 5:30 PM, Jeff Haran <jharan@bytemobile.com> wrote:

>  Seems reasonable.****
>
> ** **
>
> *From:* james.voip at gmail.com [mailto:james.voip at gmail.com] *On Behalf Of *james
> jones
> *Sent:* Tuesday, March 13, 2012 2:29 PM
> *To:* Jeff Haran
> *Subject:* Re: Playing with Network Stack****
>
> ** **
>
> I think the NF_IP_PRE_ROUTING hook is what I am most interested in.****
>
> On Tue, Mar 13, 2012 at 5:07 PM, Jeff Haran <jharan@bytemobile.com> wrote:
> ****
>
>  ****
>
>  ****
>
> *From:* kernelnewbies-bounces+jharan=bytemobile.com at kernelnewbies.org[mailto:
> kernelnewbies-bounces+jharan=bytemobile.com at kernelnewbies.org] *On Behalf
> Of *james jones
> *Sent:* Tuesday, March 13, 2012 1:50 PM
> *To:* kernelnewbies at kernelnewbies.org
> *Subject:* Playing with Network Stack****
>
>  ****
>
> Greetings,****
>
>  ****
>
> I hoping someone here can help point me in the right direction. I had an
> idea for project, but I lack some of the know how. I was wonder if it might
> be possible to have a kernel module or an application that can inspect
> and mangle a packet before it gets routed? I don't want to just sniff the
> traffic. I want to be able to look at the packet and then hand it back to
> the network stack for processing. If so is there some reading or example
> code I could look at?****
>
>  ****
>
>  ****
>
> Thanks in advance,****
>
>  ****
>
> -James****
>
>  ****
>
> You probably want to do a search on ?netfilter hook?.****
>
>  ****
>
> Jeff Haran****
>
>  ****
>
> ** **
>
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* Playing with Network Stack
  2012-03-14 17:50       ` james jones
@ 2012-03-14 18:17         ` Jeff Haran
  0 siblings, 0 replies; 6+ messages in thread
From: Jeff Haran @ 2012-03-14 18:17 UTC (permalink / raw)
  To: kernelnewbies



From: james.voip@gmail.com [mailto:james.voip at gmail.com] On Behalf Of james jones
Sent: Wednesday, March 14, 2012 10:51 AM
To: Jeff Haran
Cc: kernelnewbies at kernelnewbies.org
Subject: Re: Playing with Network Stack

Yep that is what I wanted. Here is another question. Is it ok to use dynamic libs when linking modules?
I think the answer to that one is going to be "no".
Jeff Haran


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end of thread, other threads:[~2012-03-14 18:17 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-03-13 20:50 Playing with Network Stack james jones
2012-03-13 21:07 ` Jeff Haran
     [not found]   ` <CALcVfM2zdBJf4L7vnvaN8-rmhntM60_MfxvL7mdzj14k-VYvgQ@mail.gmail.com>
     [not found]     ` <471DE477E2B1F549A58F3A14A27180BE013CB4@HQ-EX01.bytemobile.com>
2012-03-14 17:50       ` james jones
2012-03-14 18:17         ` Jeff Haran
2012-03-14  4:42 ` Sankalp Bagaria
2012-03-14 17:45   ` james jones

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