[Click] todevice and madwifi-ng in monitor mode

[Torquato Bertani]

Hi David,
thanks for your patch. Now my kernel doesn't crash anymore!
Bye

On 4/12/06, David Claffey <dclaffey at jjplus.com> wrote:
> I have the click linuxmodule and the madwifi-ng driver running on linux-2.6.12.
>   I'm using todevice() to send packets out the ath device in monitor mode.  But
> this only works after adding the following patch:
> --- click/elements/linuxmodule/todevice.cc
> +++ tmp/elements/linuxmodule/todevice.cc
> @@ -383,6 +383,12 @@
>         skb_put(skb1, 60 - skb1->len);
>       }
>
> +    skb1->dev = _dev;
> +
>       int ret;
>   #if HAVE_LINUX_POLLING
>       if (_dev->polling > 0)
>         ret = _dev->tx_queue(_dev, skb1);
>      else
> #endif
>         {
>             ret = _dev->hard_start_xmit(skb1, _dev);
>             _hard_start++;
>         }
>
> Todevice() passes the skb to ieee80211_hardstart(struct sk_buff *skb, struct
> net_device *dev) which then calls ieee80211_monitor_encap(struct ieee80211vap
> *vap, struct sk_buff *skb).  The problem arises when ieee80211_monitor_encap()
> references skb->dev->type with skb->dev NULL. Can anyone suggest which function
> should set skb->dev, todevice or ieee80211_hardstart?
>
> - David
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