If your ethernet driver is not an 8390-based  one, you have to do your
own changes (while I might  offer patches for  other devices, I am too
lazy to do it with this release).

The code is simple:

  (1) in global space add the following line:
          int (*net_shaper_rx_hook)(struct sk_buff *skb) = NULL;

  (2) Only for Linux-2.2 (not for Linux-2.0), add this too:
          EXPORT_SYMBOL(net_shaper_rx_hook)
      this line must appear after the definition of the hook.

  (3) in the receive function of the driver change
           netif_rx(skb)
  to
           if (net_shaper_rx_hook)
                   (*net_shaper_rx_hook)(skb);
           else
                   netif_rx(skb);

*/

Tu bym to wpisał ????
static void *rtl8139_probe1(struct pci_dev *pdev, void *init_dev,
                     long ioaddr, int irq, int chip_idx, int find_cnt);
static int rtl_pwr_event(void *dev_instance, int event);

The code is simple:

(1) in global space add the following line:
int (*net_shaper_rx_hook)(struct sk_buff *skb) = NULL;

(2) Only for Linux-2.2 (not for Linux-2.0), add this too:
EXPORT_SYMBOL(net_shaper_rx_hook)
this line must appear after the definition of the hook.

(3) in the receive function of the driver change
netif_rx(skb)
to
if (net_shaper_rx_hook)
(*net_shaper_rx_hook)(skb);
else
netif_rx(skb);

NOTE 1: using non-8390-based modularized drivers with Linux-2.2