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wext: Pull ioctl permission checking out into helper function. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-12-21 03:36:31 -08:00 committed by David S. Miller
parent d88174e4d2
commit 67dd760807
1 changed files with 15 additions and 7 deletions
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22
net/wireless/wext.c
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@ -1061,18 +1061,26 @@ static int wireless_process_ioctl(struct net *net, struct ifreq *ifr, unsigned i
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
/* If command is `set a parameter', or `get the encoding parameters',
* check if the user has the right to do it.
*/
static int wext_permission_check(unsigned int cmd)
{
if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)
&& !capable(CAP_NET_ADMIN))
return -EPERM;
return 0;
}
/* entry point from dev ioctl */ /* entry point from dev ioctl */
int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd, int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,
void __user *arg) void __user *arg)
{ {
int ret; int ret = wext_permission_check(cmd);
/* If command is `set a parameter', or if (ret)
* `get the encoding parameters', check if return ret;
* the user has the right to do it */
if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)
&& !capable(CAP_NET_ADMIN))
return -EPERM;
dev_load(net, ifr->ifr_name); dev_load(net, ifr->ifr_name);
rtnl_lock(); rtnl_lock();