mirror of
https://github.com/torvalds/linux.git
synced 2024-11-30 16:11:38 +00:00
b47f610bd6
When freeing the connect keys, clear the memory to avoid having the key material stick around in memory "forever". Signed-off-by: Johannes Berg <johannes.berg@intel.com>
415 lines
9.2 KiB
C
415 lines
9.2 KiB
C
/*
|
|
* cfg80211 wext compat for managed mode.
|
|
*
|
|
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
|
|
* Copyright (C) 2009 Intel Corporation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/slab.h>
|
|
#include <net/cfg80211.h>
|
|
#include <net/cfg80211-wext.h>
|
|
#include "wext-compat.h"
|
|
#include "nl80211.h"
|
|
|
|
int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_cached_keys *ck = NULL;
|
|
const u8 *prev_bssid = NULL;
|
|
int err, i;
|
|
|
|
ASSERT_RTNL();
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (!netif_running(wdev->netdev))
|
|
return 0;
|
|
|
|
wdev->wext.connect.ie = wdev->wext.ie;
|
|
wdev->wext.connect.ie_len = wdev->wext.ie_len;
|
|
|
|
/* Use default background scan period */
|
|
wdev->wext.connect.bg_scan_period = -1;
|
|
|
|
if (wdev->wext.keys) {
|
|
wdev->wext.keys->def = wdev->wext.default_key;
|
|
wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
|
|
if (wdev->wext.default_key != -1)
|
|
wdev->wext.connect.privacy = true;
|
|
}
|
|
|
|
if (!wdev->wext.connect.ssid_len)
|
|
return 0;
|
|
|
|
if (wdev->wext.keys) {
|
|
ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
|
|
if (!ck)
|
|
return -ENOMEM;
|
|
for (i = 0; i < 6; i++)
|
|
ck->params[i].key = ck->data[i];
|
|
}
|
|
|
|
if (wdev->wext.prev_bssid_valid)
|
|
prev_bssid = wdev->wext.prev_bssid;
|
|
|
|
err = cfg80211_connect(rdev, wdev->netdev,
|
|
&wdev->wext.connect, ck, prev_bssid);
|
|
if (err)
|
|
kzfree(ck);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_freq *wextfreq, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
|
|
struct ieee80211_channel *chan = NULL;
|
|
int err, freq;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
freq = cfg80211_wext_freq(wextfreq);
|
|
if (freq < 0)
|
|
return freq;
|
|
|
|
if (freq) {
|
|
chan = ieee80211_get_channel(wdev->wiphy, freq);
|
|
if (!chan)
|
|
return -EINVAL;
|
|
if (chan->flags & IEEE80211_CHAN_DISABLED)
|
|
return -EINVAL;
|
|
}
|
|
|
|
wdev_lock(wdev);
|
|
|
|
if (wdev->conn) {
|
|
bool event = true;
|
|
|
|
if (wdev->wext.connect.channel == chan) {
|
|
err = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* if SSID set, we'll try right again, avoid event */
|
|
if (wdev->wext.connect.ssid_len)
|
|
event = false;
|
|
err = cfg80211_disconnect(rdev, dev,
|
|
WLAN_REASON_DEAUTH_LEAVING, event);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
|
|
wdev->wext.connect.channel = chan;
|
|
|
|
/*
|
|
* SSID is not set, we just want to switch monitor channel,
|
|
* this is really just backward compatibility, if the SSID
|
|
* is set then we use the channel to select the BSS to use
|
|
* to connect to instead. If we were connected on another
|
|
* channel we disconnected above and reconnect below.
|
|
*/
|
|
if (chan && !wdev->wext.connect.ssid_len) {
|
|
struct cfg80211_chan_def chandef = {
|
|
.width = NL80211_CHAN_WIDTH_20_NOHT,
|
|
.center_freq1 = freq,
|
|
};
|
|
|
|
chandef.chan = ieee80211_get_channel(&rdev->wiphy, freq);
|
|
if (chandef.chan)
|
|
err = cfg80211_set_monitor_channel(rdev, &chandef);
|
|
else
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
err = cfg80211_mgd_wext_connect(rdev, wdev);
|
|
out:
|
|
wdev_unlock(wdev);
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_freq *freq, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct ieee80211_channel *chan = NULL;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->current_bss)
|
|
chan = wdev->current_bss->pub.channel;
|
|
else if (wdev->wext.connect.channel)
|
|
chan = wdev->wext.connect.channel;
|
|
wdev_unlock(wdev);
|
|
|
|
if (chan) {
|
|
freq->m = chan->center_freq;
|
|
freq->e = 6;
|
|
return 0;
|
|
}
|
|
|
|
/* no channel if not joining */
|
|
return -EINVAL;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_siwessid(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_point *data, char *ssid)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
|
|
size_t len = data->length;
|
|
int err;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
if (!data->flags)
|
|
len = 0;
|
|
|
|
/* iwconfig uses nul termination in SSID.. */
|
|
if (len > 0 && ssid[len - 1] == '\0')
|
|
len--;
|
|
|
|
wdev_lock(wdev);
|
|
|
|
err = 0;
|
|
|
|
if (wdev->conn) {
|
|
bool event = true;
|
|
|
|
if (wdev->wext.connect.ssid && len &&
|
|
len == wdev->wext.connect.ssid_len &&
|
|
memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
|
|
goto out;
|
|
|
|
/* if SSID set now, we'll try to connect, avoid event */
|
|
if (len)
|
|
event = false;
|
|
err = cfg80211_disconnect(rdev, dev,
|
|
WLAN_REASON_DEAUTH_LEAVING, event);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
wdev->wext.prev_bssid_valid = false;
|
|
wdev->wext.connect.ssid = wdev->wext.ssid;
|
|
memcpy(wdev->wext.ssid, ssid, len);
|
|
wdev->wext.connect.ssid_len = len;
|
|
|
|
wdev->wext.connect.crypto.control_port = false;
|
|
wdev->wext.connect.crypto.control_port_ethertype =
|
|
cpu_to_be16(ETH_P_PAE);
|
|
|
|
err = cfg80211_mgd_wext_connect(rdev, wdev);
|
|
out:
|
|
wdev_unlock(wdev);
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_giwessid(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_point *data, char *ssid)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
data->flags = 0;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->current_bss) {
|
|
const u8 *ie;
|
|
|
|
rcu_read_lock();
|
|
ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
|
|
WLAN_EID_SSID);
|
|
if (ie) {
|
|
data->flags = 1;
|
|
data->length = ie[1];
|
|
memcpy(ssid, ie + 2, data->length);
|
|
}
|
|
rcu_read_unlock();
|
|
} else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
|
|
data->flags = 1;
|
|
data->length = wdev->wext.connect.ssid_len;
|
|
memcpy(ssid, wdev->wext.connect.ssid, data->length);
|
|
}
|
|
wdev_unlock(wdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_siwap(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct sockaddr *ap_addr, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
|
|
u8 *bssid = ap_addr->sa_data;
|
|
int err;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
if (ap_addr->sa_family != ARPHRD_ETHER)
|
|
return -EINVAL;
|
|
|
|
/* automatic mode */
|
|
if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
|
|
bssid = NULL;
|
|
|
|
wdev_lock(wdev);
|
|
|
|
if (wdev->conn) {
|
|
err = 0;
|
|
/* both automatic */
|
|
if (!bssid && !wdev->wext.connect.bssid)
|
|
goto out;
|
|
|
|
/* fixed already - and no change */
|
|
if (wdev->wext.connect.bssid && bssid &&
|
|
ether_addr_equal(bssid, wdev->wext.connect.bssid))
|
|
goto out;
|
|
|
|
err = cfg80211_disconnect(rdev, dev,
|
|
WLAN_REASON_DEAUTH_LEAVING, false);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
if (bssid) {
|
|
memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
|
|
wdev->wext.connect.bssid = wdev->wext.bssid;
|
|
} else
|
|
wdev->wext.connect.bssid = NULL;
|
|
|
|
err = cfg80211_mgd_wext_connect(rdev, wdev);
|
|
out:
|
|
wdev_unlock(wdev);
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_mgd_wext_giwap(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct sockaddr *ap_addr, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
|
|
/* call only for station! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
|
|
return -EINVAL;
|
|
|
|
ap_addr->sa_family = ARPHRD_ETHER;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->current_bss)
|
|
memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
|
|
else
|
|
memset(ap_addr->sa_data, 0, ETH_ALEN);
|
|
wdev_unlock(wdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cfg80211_wext_siwgenie(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_point *data, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
|
|
u8 *ie = extra;
|
|
int ie_len = data->length, err;
|
|
|
|
if (wdev->iftype != NL80211_IFTYPE_STATION)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!ie_len)
|
|
ie = NULL;
|
|
|
|
wdev_lock(wdev);
|
|
|
|
/* no change */
|
|
err = 0;
|
|
if (wdev->wext.ie_len == ie_len &&
|
|
memcmp(wdev->wext.ie, ie, ie_len) == 0)
|
|
goto out;
|
|
|
|
if (ie_len) {
|
|
ie = kmemdup(extra, ie_len, GFP_KERNEL);
|
|
if (!ie) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
} else
|
|
ie = NULL;
|
|
|
|
kfree(wdev->wext.ie);
|
|
wdev->wext.ie = ie;
|
|
wdev->wext.ie_len = ie_len;
|
|
|
|
if (wdev->conn) {
|
|
err = cfg80211_disconnect(rdev, dev,
|
|
WLAN_REASON_DEAUTH_LEAVING, false);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
/* userspace better not think we'll reconnect */
|
|
err = 0;
|
|
out:
|
|
wdev_unlock(wdev);
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_wext_siwmlme(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct iw_point *data, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct iw_mlme *mlme = (struct iw_mlme *)extra;
|
|
struct cfg80211_registered_device *rdev;
|
|
int err;
|
|
|
|
if (!wdev)
|
|
return -EOPNOTSUPP;
|
|
|
|
rdev = wiphy_to_rdev(wdev->wiphy);
|
|
|
|
if (wdev->iftype != NL80211_IFTYPE_STATION)
|
|
return -EINVAL;
|
|
|
|
if (mlme->addr.sa_family != ARPHRD_ETHER)
|
|
return -EINVAL;
|
|
|
|
wdev_lock(wdev);
|
|
switch (mlme->cmd) {
|
|
case IW_MLME_DEAUTH:
|
|
case IW_MLME_DISASSOC:
|
|
err = cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
|
|
break;
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|