537 lines
12 KiB
C
537 lines
12 KiB
C
/*
|
|
* Some IBSS support code for cfg80211.
|
|
*
|
|
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
|
|
*/
|
|
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <net/cfg80211.h>
|
|
#include "wext-compat.h"
|
|
#include "nl80211.h"
|
|
#include "rdev-ops.h"
|
|
|
|
|
|
void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_bss *bss;
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
union iwreq_data wrqu;
|
|
#endif
|
|
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return;
|
|
|
|
if (!wdev->ssid_len)
|
|
return;
|
|
|
|
bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
|
|
wdev->ssid, wdev->ssid_len,
|
|
WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
|
|
|
|
if (WARN_ON(!bss))
|
|
return;
|
|
|
|
if (wdev->current_bss) {
|
|
cfg80211_unhold_bss(wdev->current_bss);
|
|
cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
|
|
}
|
|
|
|
cfg80211_hold_bss(bss_from_pub(bss));
|
|
wdev->current_bss = bss_from_pub(bss);
|
|
|
|
cfg80211_upload_connect_keys(wdev);
|
|
|
|
nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid,
|
|
GFP_KERNEL);
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
memset(&wrqu, 0, sizeof(wrqu));
|
|
memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
|
|
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
|
|
#endif
|
|
}
|
|
|
|
void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
|
|
struct cfg80211_event *ev;
|
|
unsigned long flags;
|
|
|
|
trace_cfg80211_ibss_joined(dev, bssid);
|
|
|
|
ev = kzalloc(sizeof(*ev), gfp);
|
|
if (!ev)
|
|
return;
|
|
|
|
ev->type = EVENT_IBSS_JOINED;
|
|
memcpy(ev->cr.bssid, bssid, ETH_ALEN);
|
|
|
|
spin_lock_irqsave(&wdev->event_lock, flags);
|
|
list_add_tail(&ev->list, &wdev->event_list);
|
|
spin_unlock_irqrestore(&wdev->event_lock, flags);
|
|
queue_work(cfg80211_wq, &rdev->event_work);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_ibss_joined);
|
|
|
|
int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct cfg80211_ibss_params *params,
|
|
struct cfg80211_cached_keys *connkeys)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (wdev->ssid_len)
|
|
return -EALREADY;
|
|
|
|
if (!params->basic_rates) {
|
|
/*
|
|
* If no rates were explicitly configured,
|
|
* use the mandatory rate set for 11b or
|
|
* 11a for maximum compatibility.
|
|
*/
|
|
struct ieee80211_supported_band *sband =
|
|
rdev->wiphy.bands[params->chandef.chan->band];
|
|
int j;
|
|
u32 flag = params->chandef.chan->band == IEEE80211_BAND_5GHZ ?
|
|
IEEE80211_RATE_MANDATORY_A :
|
|
IEEE80211_RATE_MANDATORY_B;
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
if (sband->bitrates[j].flags & flag)
|
|
params->basic_rates |= BIT(j);
|
|
}
|
|
}
|
|
|
|
if (WARN_ON(wdev->connect_keys))
|
|
kfree(wdev->connect_keys);
|
|
wdev->connect_keys = connkeys;
|
|
|
|
wdev->ibss_fixed = params->channel_fixed;
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
wdev->wext.ibss.chandef = params->chandef;
|
|
#endif
|
|
|
|
err = cfg80211_can_use_chan(rdev, wdev, params->chandef.chan,
|
|
params->channel_fixed
|
|
? CHAN_MODE_SHARED
|
|
: CHAN_MODE_EXCLUSIVE);
|
|
if (err) {
|
|
wdev->connect_keys = NULL;
|
|
return err;
|
|
}
|
|
|
|
err = rdev_join_ibss(rdev, dev, params);
|
|
if (err) {
|
|
wdev->connect_keys = NULL;
|
|
return err;
|
|
}
|
|
|
|
memcpy(wdev->ssid, params->ssid, params->ssid_len);
|
|
wdev->ssid_len = params->ssid_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct cfg80211_ibss_params *params,
|
|
struct cfg80211_cached_keys *connkeys)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
wdev_lock(wdev);
|
|
err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
|
|
int i;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
kfree(wdev->connect_keys);
|
|
wdev->connect_keys = NULL;
|
|
|
|
/*
|
|
* Delete all the keys ... pairwise keys can't really
|
|
* exist any more anyway, but default keys might.
|
|
*/
|
|
if (rdev->ops->del_key)
|
|
for (i = 0; i < 6; i++)
|
|
rdev_del_key(rdev, dev, i, false, NULL);
|
|
|
|
if (wdev->current_bss) {
|
|
cfg80211_unhold_bss(wdev->current_bss);
|
|
cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
|
|
}
|
|
|
|
wdev->current_bss = NULL;
|
|
wdev->ssid_len = 0;
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
if (!nowext)
|
|
wdev->wext.ibss.ssid_len = 0;
|
|
#endif
|
|
}
|
|
|
|
void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
|
|
wdev_lock(wdev);
|
|
__cfg80211_clear_ibss(dev, nowext);
|
|
wdev_unlock(wdev);
|
|
}
|
|
|
|
int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, bool nowext)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (!wdev->ssid_len)
|
|
return -ENOLINK;
|
|
|
|
err = rdev_leave_ibss(rdev, dev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
__cfg80211_clear_ibss(dev, nowext);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, bool nowext)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
wdev_lock(wdev);
|
|
err = __cfg80211_leave_ibss(rdev, dev, nowext);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_cached_keys *ck = NULL;
|
|
enum ieee80211_band band;
|
|
int i, err;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (!wdev->wext.ibss.beacon_interval)
|
|
wdev->wext.ibss.beacon_interval = 100;
|
|
|
|
/* try to find an IBSS channel if none requested ... */
|
|
if (!wdev->wext.ibss.chandef.chan) {
|
|
wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
|
|
|
|
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_channel *chan;
|
|
|
|
sband = rdev->wiphy.bands[band];
|
|
if (!sband)
|
|
continue;
|
|
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
chan = &sband->channels[i];
|
|
if (chan->flags & IEEE80211_CHAN_NO_IBSS)
|
|
continue;
|
|
if (chan->flags & IEEE80211_CHAN_DISABLED)
|
|
continue;
|
|
wdev->wext.ibss.chandef.chan = chan;
|
|
break;
|
|
}
|
|
|
|
if (wdev->wext.ibss.chandef.chan)
|
|
break;
|
|
}
|
|
|
|
if (!wdev->wext.ibss.chandef.chan)
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* don't join -- SSID is not there */
|
|
if (!wdev->wext.ibss.ssid_len)
|
|
return 0;
|
|
|
|
if (!netif_running(wdev->netdev))
|
|
return 0;
|
|
|
|
if (wdev->wext.keys) {
|
|
wdev->wext.keys->def = wdev->wext.default_key;
|
|
wdev->wext.keys->defmgmt = wdev->wext.default_mgmt_key;
|
|
}
|
|
|
|
wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
|
|
|
|
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];
|
|
}
|
|
err = __cfg80211_join_ibss(rdev, wdev->netdev,
|
|
&wdev->wext.ibss, ck);
|
|
if (err)
|
|
kfree(ck);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_ibss_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_dev(wdev->wiphy);
|
|
struct ieee80211_channel *chan = NULL;
|
|
int err, freq;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!rdev->ops->join_ibss)
|
|
return -EOPNOTSUPP;
|
|
|
|
freq = cfg80211_wext_freq(wdev->wiphy, wextfreq);
|
|
if (freq < 0)
|
|
return freq;
|
|
|
|
if (freq) {
|
|
chan = ieee80211_get_channel(wdev->wiphy, freq);
|
|
if (!chan)
|
|
return -EINVAL;
|
|
if (chan->flags & IEEE80211_CHAN_NO_IBSS ||
|
|
chan->flags & IEEE80211_CHAN_DISABLED)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (wdev->wext.ibss.chandef.chan == chan)
|
|
return 0;
|
|
|
|
wdev_lock(wdev);
|
|
err = 0;
|
|
if (wdev->ssid_len)
|
|
err = __cfg80211_leave_ibss(rdev, dev, true);
|
|
wdev_unlock(wdev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (chan) {
|
|
wdev->wext.ibss.chandef.chan = chan;
|
|
wdev->wext.ibss.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
|
|
wdev->wext.ibss.channel_fixed = true;
|
|
} else {
|
|
/* cfg80211_ibss_wext_join will pick one if needed */
|
|
wdev->wext.ibss.channel_fixed = false;
|
|
}
|
|
|
|
wdev_lock(wdev);
|
|
err = cfg80211_ibss_wext_join(rdev, wdev);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_ibss_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 ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->current_bss)
|
|
chan = wdev->current_bss->pub.channel;
|
|
else if (wdev->wext.ibss.chandef.chan)
|
|
chan = wdev->wext.ibss.chandef.chan;
|
|
wdev_unlock(wdev);
|
|
|
|
if (chan) {
|
|
freq->m = chan->center_freq;
|
|
freq->e = 6;
|
|
return 0;
|
|
}
|
|
|
|
/* no channel if not joining */
|
|
return -EINVAL;
|
|
}
|
|
|
|
int cfg80211_ibss_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_dev(wdev->wiphy);
|
|
size_t len = data->length;
|
|
int err;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!rdev->ops->join_ibss)
|
|
return -EOPNOTSUPP;
|
|
|
|
wdev_lock(wdev);
|
|
err = 0;
|
|
if (wdev->ssid_len)
|
|
err = __cfg80211_leave_ibss(rdev, dev, true);
|
|
wdev_unlock(wdev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* iwconfig uses nul termination in SSID.. */
|
|
if (len > 0 && ssid[len - 1] == '\0')
|
|
len--;
|
|
|
|
wdev->wext.ibss.ssid = wdev->ssid;
|
|
memcpy(wdev->wext.ibss.ssid, ssid, len);
|
|
wdev->wext.ibss.ssid_len = len;
|
|
|
|
wdev_lock(wdev);
|
|
err = cfg80211_ibss_wext_join(rdev, wdev);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_ibss_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 ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
data->flags = 0;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->ssid_len) {
|
|
data->flags = 1;
|
|
data->length = wdev->ssid_len;
|
|
memcpy(ssid, wdev->ssid, data->length);
|
|
} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
|
|
data->flags = 1;
|
|
data->length = wdev->wext.ibss.ssid_len;
|
|
memcpy(ssid, wdev->wext.ibss.ssid, data->length);
|
|
}
|
|
wdev_unlock(wdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int cfg80211_ibss_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_dev(wdev->wiphy);
|
|
u8 *bssid = ap_addr->sa_data;
|
|
int err;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!rdev->ops->join_ibss)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (ap_addr->sa_family != ARPHRD_ETHER)
|
|
return -EINVAL;
|
|
|
|
/* automatic mode */
|
|
if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
|
|
bssid = NULL;
|
|
|
|
/* both automatic */
|
|
if (!bssid && !wdev->wext.ibss.bssid)
|
|
return 0;
|
|
|
|
/* fixed already - and no change */
|
|
if (wdev->wext.ibss.bssid && bssid &&
|
|
ether_addr_equal(bssid, wdev->wext.ibss.bssid))
|
|
return 0;
|
|
|
|
wdev_lock(wdev);
|
|
err = 0;
|
|
if (wdev->ssid_len)
|
|
err = __cfg80211_leave_ibss(rdev, dev, true);
|
|
wdev_unlock(wdev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (bssid) {
|
|
memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
|
|
wdev->wext.ibss.bssid = wdev->wext.bssid;
|
|
} else
|
|
wdev->wext.ibss.bssid = NULL;
|
|
|
|
wdev_lock(wdev);
|
|
err = cfg80211_ibss_wext_join(rdev, wdev);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_ibss_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 ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
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 if (wdev->wext.ibss.bssid)
|
|
memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
|
|
else
|
|
memset(ap_addr->sa_data, 0, ETH_ALEN);
|
|
|
|
wdev_unlock(wdev);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|