some key low level functions for networking:
a. netif_rx()--> just after the interrupt level, and before the
TCP/IP interface are called, for reciving packets.
b. dev_queue_xmit()--> the equivalent of above but for transmission.
c. ip_rcv(), tcp_v4_do_rcv(), tcp_v4_rcv() etc.
d. tcp_sendmsg(), tcp_recvmsg() etc.
On Tue, Dec 16, 2008 at 10:32 AM, Li, Chanjuan <lichanjuan04@xxxxxxxxx> wrote:
>
>
> ---------- Forwarded message ----------
> From: Li, Chanjuan <lichanjuan04@xxxxxxxxx>
> Date: Tue, Dec 16, 2008 at 10:30 AM
> Subject: how to
> To: kernelnewbies@xxxxxxxxxxxx
>
>
> hi,all:
> I am a newbie on linux kernel. now I encountered a problem on socket in
> kernel space.I create a SOCK_DGRAM socket in kernel space . What I want to
> do can
> be described as follows:
> while(1){
> if( packet received)
> call packet handler
> }
>
> my problem is how to know packet received at kernel space. In user space
> there is select() to use, but in kernel space, there is no such function.
> I have read sk_buff and struct sock definition to find some hint, but still
> have no idea. I think it is a good place to ask for help. thanks in advance.
>
>
> lily
>
>
>
--
Regards,
Peter Teoh
Ernest Hemingway - "Never mistake motion for action."
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