Where is ip_finish_output in 2.6.23 kernel

iamjayanth · 11-24-2008, 11:08 PM

Hi masters,

I am using fedora 2.6.23.1-42.fc8 kernel and am trying to design a packet filtering system using netfilter. But in the above mentioned kernel I couldn't find the familiar function ip_finish_output. I have done the same project in kernel 2.4 and 2.6.9 redhat.

Can anybody tell me is there any replacement for the above function in 2.6.23 kernel.Or if the function is there can anyone tell me in which path they are present. I have already done a grep in the kernel source tree yielding zero result.

grep -r ip_finish_output /usr/src/kernels/2.6.23.1-42.fc8-i686/*

resulted in the following output.
/usr/src/kernels/2.6.23.1-42.fc8-i686/System.map:c11dbd3e t ip_finish_output
/usr/src/kernels/2.6.23.1-42.fc8-i686/System.map:c11dbf59 t ip_finish_output2

Can anybody help me.

regards

knudfl · 11-25-2008, 08:59 AM

'grep ip_finish_output linux-2.6.26/net/*/*'

output =

Quote:

linux-2.6.26/net/ipv4/ip_output.c:static inline int ip_finish_output2(struct sk_buff *skb)
linux-2.6.26/net/ipv4/ip_output.c:
printk(KERN_DEBUG "ip_finish_output2: No header cache and no neighbour!\n");
linux-2.6.26/net/ipv4/ip_output.c:static int ip_finish_output(struct sk_buff *skb)
linux-2.6.26/net/ipv4/ip_output.c: return ip_fragment(skb, ip_finish_output2);
linux-2.6.26/net/ipv4/ip_output.c: return ip_finish_output2(skb);
linux-2.6.26/net/ipv4/ip_output.c: ip_finish_output,
linux-2.6.26/net/ipv4/ip_output.c: ip_finish_output,

EDIT : Same in 2.6.23.9 , but then again, if you got it
from Fedora, something could be modified ?
(In Fedora 'kernel-devel' most files are missing)

iamjayanth · 11-25-2008, 10:22 PM

If there is no ip_finish_output in fedora , what replaces that. There should be something which should work exactly like ip_finish_output. How can I output packets that I have stolen. Also In my system there is no ip_output.c function also.
Thanks for the reply,Please help me . I am in a road block.

knudfl · 11-26-2008, 07:06 AM

If you want to build a new kernel, the full kernel
source exists :
The package 'kernel-2.6.23.1-42.fc8.src.rpm'
http://download.fedora.redhat.com/pu.../source/SRPMS/
which will "install" (unpack) to
/usr/src/redhat/SOURCES/linux-2.6.23.tar.bz2 + 170 patches
and other files.

setutsi · 01-27-2009, 05:11 AM

hi all!
I am trying to build a kernel module which requires me to use the ip_output() function.

I have included the header file "<include/net/ip.h>"
which contains the declaration for ip_output().

when I compile with

make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

I get the warning below:
WARNING: "ip_output" [/home/eric/Desktop/modelnet/linux_module/linuxmodelnet.ko] undefined!

How do I get it to see the definition which is in "<net/ipv4/ip_output.c>"
Any help will be very much appreciated
thanks

knudfl · 01-28-2009, 12:34 AM

setutsi # 5 : Welcome to LQ.

Suggest : Start a new thread with the question.
You won't get any answers in this old thread.

http://www.linuxquestions.org/linux/...Ask_a_Question
http://linuxsilo.net/docs/smart-questions_en.html
> > Please show, which Linux, you are using,
and "Linux" version, please. Like RH EL5 , Fedora "9"
Ubuntu 8.10 ... etc. etc.

Good luck.