hello all,

I need to write a wrapper function to perform route table entries lookup.

The (2.4.18/2.4.24) Linux Machine shall be configured as router.

I have information of few important fields, like
+ Src Address / Dst Address of IPv4 Packets.
+ incoming interface (in_dev)
+ I do not know if I shall need any other field, but saw "tos" was
extremely used.

I need such function, as either I actually do not have IPv4 packet/SKB, or I do not want Linux IP Kernel Layer to process it.

In other word, given such fields, I wish to find out which route table entry qualifies for such query.

So I need
Ques 1 ) some inputs on what shall be best and minimal set of
parameters. Lookup Performance is not needed as of now;
Ques 2) Which function(s) from ipv4/route.c I can use.
I saw
a. inet_rtm_getroute,
b. ip_route_input (_slow)
c. ip_route_output(_slow)
these functions in route.c.
But I am unsure, how to correctly use to implement my wrapper.

any help is most welcomed.

thanks

- nalin
nalingupta2000@yahoo.co.in