okay so ld keeps returning a undefined reference error to tun_open if I write it the way mem.c does its open function and I am not sure why?
```
 status_t
tun_open(const char *name, uint32 flags, void** cookie)
{
	/* Make interface here */
	dprintf("tun:open_driver()\n");
	*cookie = NULL;
	return B_OK;
}
```
This is the error:
```
driver.o:(.data.rel+0x0): undefined reference to `tun_open(char const*, unsigned int, void*)'
collect2: error: ld returned 1 exit status
```