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Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


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Old 04-18-2005, 04:33 AM   #1
Registered: Oct 2004
Location: USA
Distribution: Fedora Core 3, Red Hat 9, CentOS 4.2, Mandriva, Ret Hat Enterprise Linux 4.0
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Where is the routing table created?

Hi all,

I'm working on my senior year project which is os/networks related. It involves kernel programming. I need to know where excactly the routing table is being constructed in the kernel. Which file should i look at, i looked at /usr/src/linux/net/ipv4/route.c but i couldn't understand what's happening exactly.

When you type the route command the routing table is displayed. I need to do something with the routing table entries for instance save a particular entry and send it over the network to another pc in the form of a packet. How do i go about it and where would i think about making the modifications/additions ?

Any link/resource on this kind of a thing?

Thanks in advance
Old 04-18-2005, 05:08 AM   #2
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Registered: May 2003
Location: INDIA
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hi there

routes are not stored in any file but they are calculated run time based on ur IPaddres and default gateways specified

also if u want to look to the soure of the route utlility then lookinto

run this

rpm -qf /sbin/route

and u will get the name of the package that has the code for the route utility and then get the soure of that package and u can see how the roite utlilty works



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