From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Menegotto Subject: Re: Linux networking implementation and packet capture Date: Thu, 27 Sep 2007 07:48:37 -0300 Message-ID: <46FB8A85.2080003@gmail.com> References: <1a41e0840709262347m1fc5d99dge9aeb172b7fc610e@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kernelnewbies@nl.linux.org, linux-net@vger.kernel.org, netdev@vger.kernel.org To: Gaurav Aggarwal Return-path: In-Reply-To: <1a41e0840709262347m1fc5d99dge9aeb172b7fc610e@mail.gmail.com> Sender: linux-net-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Gaurav Aggarwal escreveu: > Hi, > > I am trying to understand the implementation of linux 2.4 and linux > 2.6's networking (IPV4) . Can anyone give me some idea/pointers about > some of the good resources/whitepapers available in the market to > understand the same. If there is any document that mention the changes > between the implementation of networking in 2.4 & 2.6 > > I am also trying to write a simple program(preferably a userspace > application) which captures all the incoming and outgoing packets of a > particular machine (preferably at PREROUTING stage), then according to > the SRC/DST addresses, changes the IP address of some of the packets > and then reinject it back into the local IP stack. I am able to do > that in 2.4 kernel by using libipq and ip_tables but that prog is not > running in 2.6 kernel. (It hits at ip_route_BUG). Any idea or code > snippet will be really appreciated. > > -- > Regards, > Gaurav Aggarwal > You may also see the information on the linux-net wiki: http://linux-net.osdl.org/index.php/Main_Page. Also, read some threads on netdev list. It has a lot of information there too. -- -- Best Regards Alan Menegotto