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/* 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 8
int 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 > 12
static const iw_handler handler_table[] =
{
...
(iw_handler) ioctl_set_encode, /* SIOCSIWENCODE */
(iw_handler) ioctl_get_encode, /* SIOCGIWENCODE */
};
#else /* WIRELESS_EXT < 12 */
static int
do_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 */
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