Sending IP datagrams

Sending IP datagrams

[Josef E. Galea]

Hi,

Is there any way, other than socket buffers, to send IP datagrams from a 
kernel module? If yes, can you please point me to some good tutorial or 
sample code

Thanks
Josef Galea

Re: Sending IP datagrams

[Scott Feldman]

On Mar 7, 2005, at 3:48 PM, Josef E. Galea wrote:

> Hi,
>
> Is there any way, other than socket buffers, to send IP datagrams from 
> a kernel module? If yes, can you please point me to some good tutorial 
> or sample code

See net/core/pktgen.c for an example.

-scott

Re: Sending IP datagrams

[Josef E. Galea]

Scott Feldman wrote:

>
> On Mar 7, 2005, at 3:48 PM, Josef E. Galea wrote:
>
>> Hi,
>>
>> Is there any way, other than socket buffers, to send IP datagrams 
>> from a kernel module? If yes, can you please point me to some good 
>> tutorial or sample code
>
>
> See net/core/pktgen.c for an example.
>
> -scott
>
AFAIK that module uses socket buffers (struct sk_buff) to send the 
packets. I was asking whether there was another way to send the IP 
datagrams.

Thanks for your reply :)

Josef

Re: Sending IP datagrams

[Scott Feldman]

On Mar 7, 2005, at 4:53 PM, Josef E. Galea wrote:

> AFAIK that module uses socket buffers (struct sk_buff) to send the 
> packets. I was asking whether there was another way to send the IP 
> datagrams.

Well the network device driver wants a sk_buff (hard_start_xmit) so 
you'd need to modify the network device driver to accept something else 
if you don't want to use sk_buffs.  What's wrong with sk_buffs for your 
problem?

-scott

Re: Sending IP datagrams

[Ben Greear]

Josef E. Galea wrote:
> Scott Feldman wrote:
> 
>>
>> On Mar 7, 2005, at 3:48 PM, Josef E. Galea wrote:
>>
>>> Hi,
>>>
>>> Is there any way, other than socket buffers, to send IP datagrams 
>>> from a kernel module? If yes, can you please point me to some good 
>>> tutorial or sample code
>>
>>
>>
>> See net/core/pktgen.c for an example.
>>
>> -scott
>>
> AFAIK that module uses socket buffers (struct sk_buff) to send the 
> packets. I was asking whether there was another way to send the IP 
> datagrams.

The sk_buf is the thing you send to network drivers, it doesn't get
any more basic unless you are hacking a particular driver and DMA'ing memory
or something like that...

Maybe you should explain what you are really trying to do?

Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com