compiling ipv4 sorce file

[jagadish rouniyar]

hi ,
 
i want to modify the sorce file of ip_input.c of ipv4
version .when the packet comes to ip_input.c ,before
forwarding i want to process the packets having low
data byte size.It's an extending of the ip protocol
something like TCP is modified to T/TCP.

so i want to know how can i 'make' ipv4 sorce file?

  when i tried to 'make' from pwd
:/usr/src/linux-2.4.18-14/net/ipv4/ following errors
and changes have been made respectively.
1. error:- Ruales.make:no such files or directory
   changes:-Rules.make  is copied to the include file
2.error(after coping Rules.make):-util.c :tcp.h :no
such files or directory
 ip.h:no such files or directory
 protocol.h: no such files or directory
changes:-these header files are copied to include file
from the sorce directory
3.error : arp.h (and other more header files are
reported  to be missing)
changes: all the header files are copied from sorce
directory to the include directory.
4.error:it presented a list of undefined symbols
,pointer errors and many other errors.

                                     jagadish






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