/* Note : this particular snipset of code is available under * the LGPL, MPL or BSD license (at your choice). * Jean II *//* --------------------------- INCLUDE --------------------------- */#define MAX_KEY_SIZE	16#define	MAX_KEYS	8int	key_on = 0;int	key_open = 1;int	key_current = 0;char	key_table[MAX_KEYS][MAX_KEY_SIZE];int	key_size[MAX_KEYS];/* --------------------------- HANDLERS --------------------------- */static int ioctl_set_encode(struct net_device *dev,			    struct iw_request_info *info,			    struct iw_point *erq,			    char *key){  int	index = (erq->flags & IW_ENCODE_INDEX) - 1;  if (erq->length > 0)    {      /* Check the size of the key */      if(erq->length > MAX_KEY_SIZE)	return(-EINVAL);      /* Check the index */      if((index < 0) || (index >= MAX_KEYS))	index = key_current;      /* Copy the key in the driver */      memcpy(key_table[index], key, erq->length);      key_size[index] = erq->length;      key_on = 1;    }  else    {      /* Do we want to just set the current key ? */      if((index >= 0) && (index < MAX_KEYS))	{	  if(key_size[index] > 0)	    {	      key_current = index;	      key_on = 1;	    }	  else	    return(-EINVAL);	}    }  /* Read the flags */  if(erq->flags & IW_ENCODE_DISABLED)    key_on = 0;		/* disable encryption */  if(erq->flags & IW_ENCODE_RESTRICTED)    key_open = 0;	/* disable open mode */  if(erq->flags & IW_ENCODE_OPEN)    key_open = 1;	/* enable open mode */  return(0);}static int ioctl_get_encode(struct net_device *dev,			    struct iw_request_info *info,			    struct iw_point *erq,			    char *key){  int	index = (erq->flags & IW_ENCODE_INDEX) - 1;  /* Set the flags */  erq->flags = 0;  if(key_on == 0)    erq->flags |= IW_ENCODE_DISABLED;  if(key_open == 0)    erq->flags |= IW_ENCODE_RESTRICTED;  else    erq->flags |= IW_ENCODE_OPEN;  /* Which key do we want */  if((index < 0) || (index >= MAX_KEYS))    index = key_current;  erq->flags |= index + 1;  /* Copy the key to the user buffer */  erq->length = key_size[index];  memcpy(key, key_table[index], key_size[index]);  return(0);}static int ioctl_get_range(struct net_device *dev,			   struct iw_request_info *info,			   struct iw_point *rrq,			   char *extra){  struct iw_range *range = (struct iw_range *) extra;  rrq->length = sizeof(struct iw_range);  memset(range, 0, sizeof(struct iw_range));#if WIRELESS_EXT > 10  /* Version we are compiled with */  range->we_version_compiled = WIRELESS_EXT;  /* Minimum version we recommend */  range->we_version_source = 8;#endif /* WIRELESS_EXT > 10 */#if WIRELESS_EXT > 8  range->encoding_size[0] = 8;	/* DES = 64 bits key */  range->encoding_size[1] = 16;  range->num_encoding_sizes = 2;  range->max_encoding_tokens = 8;#endif /* WIRELESS_EXT > 8 */  return(0);}/* --------------------------- BINDING --------------------------- */#if WIRELESS_EXT > 12static const iw_handler		handler_table[] ={	...	(iw_handler) ioctl_set_encode,		/* SIOCSIWENCODE */	(iw_handler) ioctl_get_encode,		/* SIOCGIWENCODE */};#else	/* WIRELESS_EXT < 12 */static intdo_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd){  struct iwreq *wrq = (struct iwreq *) ifr;  int		err = 0;  switch (cmd)    {#if WIRELESS_EXT > 8    case SIOCSIWENCODE:      {	char keybuf[MAX_KEY_SIZE];	if(wrq->u.encoding.pointer)	  {	    /* We actually have a key to set */	    if(wrq->u.encoding.length > MAX_KEY_SIZE)	      {		err = -E2BIG;		break;	      }	    if(copy_from_user(keybuf, wrq->u.encoding.pointer,			      wrq->u.encoding.length))	      {		err = -EFAULT;		break;	      }	  }	else	  if(wrq->u.encoding.length != 0)	    {	      err = -EINVAL;	      break;	    }	err = ioctl_set_encode(dev, NULL, &(wrq->u.encoding), keybuf);      }      break;    case SIOCGIWENCODE:      /* only super-user can see encryption key */      if(! capable(CAP_NET_ADMIN))	{	  err = -EPERM;	  break;	}      {	char keybuf[MAX_KEY_SIZE];	err = ioctl_get_encode(dev, NULL, &(wrq->u.encoding), keybuf);	if(wrq->u.encoding.pointer)	  {	    if (copy_to_user(wrq->u.encoding.pointer, keybuf,			     wrq->u.encoding.length))	      err= -EFAULT;	  }      }      break;#endif	/* WIRELESS_EXT > 8 */    }  return(err);}#endif	/* WIRELESS_EXT < 12 */