how to delay and drop the packet
 

i want to manipulate some of the fields of the packet at ip-layer at Gateway machine and want to send the manipulated packet to the
destination lying in some other network

so i want to delay and drop those packets.
could anyone tell pls, how to do that through C program
using any inbuilt functions

-----------thanx--------------------------------

Hi,

I've never done networking through C programmation... but I've just seen an iptables target that could help if you agree to do a part of this in shell script.

There's a target called u32 which seems to enable you to match packets given any bit pattern in the header (http://www.netfilter.org/documentat...ions-HOWTO.html)... thus you should be able redirect the packets you've previously modified.

Bad link, fr_laz

seriously in need of -the link is not getting open
 

seriously i need some accurate soluttion for my previous
problem,
the link is not working.
If anyone know any c code for delaying and dropping packets at gateway
pls let me know

Sorry ! Here it is :
http://www.netfilter.org/documentati...ons-HOWTO.html

but u32 filters may only solve a part of your problem : I don't think you can modify packets, only match them