* tcp/ip stack question
@ 2007-06-07 12:50 kernel coder
2007-06-07 19:01 ` Lee Revell
0 siblings, 1 reply; 2+ messages in thread
From: kernel coder @ 2007-06-07 12:50 UTC (permalink / raw)
To: linux-kernel
hi,
I am recieveing the packet on eth1 and want to send it through eth2.
I've written code in netif_recieve_skb function .This code changes the
mac header in sk_buff structure so that it can be send through other
interface card.But when i call ip_dev_find fucntion to get the second
interface structure ,NULL is returned.I checked the ip of second
ethernet card and it was similar to one passed to ip_dev_find
fucntion,then why NULL is being returned?
Actually if i get the correct dev structure from ip_dev_find fucntion
then i'll assign that dev structure to current skbuff->dev and call
dev_queue_xmit fucntion,so that it transmitted through second
interface card.Is mine approach correct?
shahzad
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: tcp/ip stack question
2007-06-07 12:50 tcp/ip stack question kernel coder
@ 2007-06-07 19:01 ` Lee Revell
0 siblings, 0 replies; 2+ messages in thread
From: Lee Revell @ 2007-06-07 19:01 UTC (permalink / raw)
To: kernel coder; +Cc: linux-kernel
On 6/7/07, kernel coder <lhrkernelcoder@gmail.com> wrote:
> hi,
> I am recieveing the packet on eth1 and want to send it through eth2.
>
> I've written code in netif_recieve_skb function .This code changes the
> mac header in sk_buff structure so that it can be send through other
> interface card.But when i call ip_dev_find fucntion to get the second
> interface structure ,NULL is returned.I checked the ip of second
> ethernet card and it was similar to one passed to ip_dev_find
> fucntion,then why NULL is being returned?
>
Um... why would you need to modify kernel code to do this? Try "man route".
Lee
^ permalink raw reply [flat|nested] 2+ messages in thread
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