Re: Problem with packet transmission

[mohanlal jangir <mohanlal@xxxxxxxxxxx>]

Did you add "my packet listener" using dev_add_pack? If yes, did you
register for IPv4 packets? In this case,when an IPv4 packet arrives on your
network, "my packet listener" will be called. But why are you calling again
netif_rx from "my packet listener"? You can simply call ip_rcv from "my
packet listener".
Also could you tell, what "my packet listener" does?
Can you check, if your driver's hard_start_xmit function is called?
Can you check, what is return value of dev_queue_xmit?

Regards
Mohanlal

----- Original Message -----
From: "vijaykumar v" <vij@xxxxxxxxxxxxx>
To: "vijaykumar v" <vij@xxxxxxxxxxxxx>
Cc: <kernelnewbies@xxxxxxxxxxxx>
Sent: Sunday, May 23, 2004 9:17 AM
Subject: Re: Problem with packet transmission


> Hi all,
>        I think the explaination I gave in the previous mail wasnt
> enough. So, I have made a figure to illustrate the situation clearly.
> Please take a look at it and give a suggestion.
>
> This module is very critical for my project. I'm desparately in need of
> a solution, as I have already wasted lot of time on fixing this bug. If
> you get a clue, Pls help.
>
> -Vij
>
> vijaykumar v wrote:
>
> > Hi,
> >    I have a problem with packet transmission. I have a virtual network
> > device driver, which drives on back of eth0. The driver, (along with a
> > small packet listener) recieves and sends packets without any problem,
> > asynchronously.
> >
> > The problem creeps in, when a reply packet is generated. ie., when a
> > packet has to be sent immediately after the arrival of another packet.
> > The reply packet doesnt get transmitted.
> >
> > This, I suppose is not a problem with my driver, as this packet is
> > queued for transmission for eth0 using "dev_queue_xmit(skb);" , with
> > skb->dev set as eth0 device. ethereal shows that the packet in the
> > eth0 device queue. But, the packet doesnt appear on the wire.
> >
> > This might be a problem with some spinlock,... in the driver.
> >
> > Can I call dev_queue_xmit at any time?. (I think timing is the problem.)
> >
> > any reply would be useful.
> >
> > Thanks in advance,
> > Vij
>
> --
> "Anything less than a conscious commitment to the important
>      is an unconscious commitment to the unimportant."
>
>


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