Re: [ECOS] wavelan driver

[Andrea Acquaviva - DEIS-micrel (93785) <aacquaviva at deis dot unibo dot it>]

Quoting Jonathan Larmour <jlarmour@redhat.com>:

> "Andrea Acquaviva - DEIS-micrel (93785)" wrote:
> > 
> > Hi,
> > 
> > I'm in the process of writing an ecos driver for the
> > wavelan card, so I need some info about the tcp/ip
> > stack.
> > 
> > In particular, looking at the driver_doc document, I
> > don't find where is the correct way to pass the IP
> > source and destination address to the card.
> 
> The stack expects to just be able to fill that in and
send it as "data". If
> you need to pass an address to the card as well as the
data, you would
> probably need to extract the addresses back out from
the packet you've been
> passed to send.
> 
> But FYI anyway, the header creation gets done in
ip_output.c
> 
> Jifl
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Hi, I've a new question about the driver.

In eth_drv.c:

1- the eth_drv_recv function requires packet data to
be   passed to it in order to fill the sg_list, so this
list will be filled with the whole packet except the
headers (802.11 and 802.3), is this correct? 
If not, what is the content of the sg_list? In addition,
because of this function is expecting only a 802.3
header, I have to pass the packet lenght minus the
802.11 header size as "total_len" argument? 

2- the eth_drv_send function fills the sg_list and calls
the HRDWR_send. What is the content of this list? More
precisely, where can I find the src and dst MAC
addresses? (I need to fill the 802.11 header with this
address)

Thank you,
Andrea.