problem in network driver

hello,

How to install realtek so that I can write a network driver on it ?
Given that I have two network cards on my Ubuntu, I want to sniff from a network traffic card and send it to another network card. How do I do this?
Does it do this by writing a network driver?

i get help for this problem from this link:
Writing Network Device Drivers for Linux LG #156

but when i running it ؛give this error:
Makefile:4:recipe for target 'all' failed
make: *** [all] Error 2
get error from this line :
pdev = pci_find_device(REALTEK_VENDER_ID, REALTEK_DEVICE_ID, NULL);
please help ...

What's the actual error message?

get error from realtek_vender_ID
.
didnt know this line : pdev = pci_find_device(REALTEK_VENDER_ID, REALTEK_DEVICE_ID, NULL);

. how to add or install realtek ?

Well since it's usually spelt REALTEK_VENDOR_ID, perhaps you can begin with spelling.

Even more likely to be so if you didn't get the same error for REALTEK_DEVICE_ID.

Code:

---

#define REALTEK_VENDER_ID  0x10EC#define REALTEK_DEVICE_ID  0x8139

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/stddef.h>
#include <linux/pci.h>
int init_module(void)
{
    struct pci_dev *pdev;
    pdev = pci_find_device(REALTEK_VENDER_ID, REALTEK_DEVICE_ID, NULL);
    if(!pdev)
        printk("<1>Device not found\n");
    else
        printk("<1>Device found\n");
    return 0; }

---

this is my code

How to write Makefile for compiling simple pgm in rt patch 2.6.24.4
An 8 year old article which tells you pci_find_device is already obsolete.
Maybe you need a better reference to copy from.