Thanks a lot !
I had tried the sending RTM_GETROUTE message using a NETLINK_ROUTE
socket in a User Space program and it went OK.
It gaves correct routing struct which I could parse.
In fact it gave the rotuing table.
But in sending that message I did not specify a certain
dest IP.
Consider the follwing simple scenario: I have 2 gateways
(one on eth0,one on eth1), and I am sending
a packet to some dest IP ; I want to know according to
that ip on which interface (or gw) it will be out
But where do I specify that certain dest IP ?
Regards,
John
On 4/25/06, Andi Kleen <[EMAIL PROTECTED]> wrote:
> On Tuesday 25 April 2006 09:31, John Que wrote:
> > Hello,
> > What is the right way to determine on which interface card
> > (eth0 or eth1) will a packet be sent (according to the dest IP)?
>
> You can send a rtnetlink RTM_GETROUTE message to ask the kernel.
> Result is the interface index in RTA_OIF, which can be converted
> into a name.
>
> -Andi
>
>
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