![Johannes Berg](/assets/img/avatar_default.png)
To make it more apparent in the code what is for wext only (and needs to be #ifdef'ed) put all the info for wext into a substruct in each wireless_dev. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
370 lines
8.7 KiB
C
370 lines
8.7 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 <net/cfg80211.h>
|
|
#include "nl80211.h"
|
|
|
|
|
|
void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_bss *bss;
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
union iwreq_data wrqu;
|
|
#endif
|
|
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return;
|
|
|
|
if (WARN_ON(!wdev->ssid_len))
|
|
return;
|
|
|
|
if (memcmp(bssid, wdev->bssid, ETH_ALEN) == 0)
|
|
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->current_bss);
|
|
}
|
|
|
|
cfg80211_hold_bss(bss);
|
|
wdev->current_bss = bss;
|
|
memcpy(wdev->bssid, bssid, ETH_ALEN);
|
|
|
|
nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid, gfp);
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
memset(&wrqu, 0, sizeof(wrqu));
|
|
memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
|
|
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_ibss_joined);
|
|
|
|
int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct cfg80211_ibss_params *params)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
if (wdev->ssid_len)
|
|
return -EALREADY;
|
|
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
wdev->wext.ibss.channel = params->channel;
|
|
#endif
|
|
err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
memcpy(wdev->ssid, params->ssid, params->ssid_len);
|
|
wdev->ssid_len = params->ssid_len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
|
|
if (wdev->current_bss) {
|
|
cfg80211_unhold_bss(wdev->current_bss);
|
|
cfg80211_put_bss(wdev->current_bss);
|
|
}
|
|
|
|
wdev->current_bss = NULL;
|
|
wdev->ssid_len = 0;
|
|
memset(wdev->bssid, 0, ETH_ALEN);
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
if (!nowext)
|
|
wdev->wext.ibss.ssid_len = 0;
|
|
#endif
|
|
}
|
|
|
|
int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, bool nowext)
|
|
{
|
|
int err;
|
|
|
|
err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
cfg80211_clear_ibss(dev, nowext);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev)
|
|
{
|
|
enum ieee80211_band band;
|
|
int i;
|
|
|
|
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.channel) {
|
|
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.channel = chan;
|
|
break;
|
|
}
|
|
|
|
if (wdev->wext.ibss.channel)
|
|
break;
|
|
}
|
|
|
|
if (!wdev->wext.ibss.channel)
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* don't join -- SSID is not there */
|
|
if (!wdev->wext.ibss.ssid_len)
|
|
return 0;
|
|
|
|
if (!netif_running(wdev->netdev))
|
|
return 0;
|
|
|
|
return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
|
|
wdev->netdev, &wdev->wext.ibss);
|
|
}
|
|
|
|
int cfg80211_ibss_wext_siwfreq(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;
|
|
int err;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
|
|
return -EOPNOTSUPP;
|
|
|
|
chan = cfg80211_wext_freq(wdev->wiphy, freq);
|
|
if (chan && IS_ERR(chan))
|
|
return PTR_ERR(chan);
|
|
|
|
if (chan &&
|
|
(chan->flags & IEEE80211_CHAN_NO_IBSS ||
|
|
chan->flags & IEEE80211_CHAN_DISABLED))
|
|
return -EINVAL;
|
|
|
|
if (wdev->wext.ibss.channel == chan)
|
|
return 0;
|
|
|
|
if (wdev->ssid_len) {
|
|
err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
|
|
dev, true);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (chan) {
|
|
wdev->wext.ibss.channel = chan;
|
|
wdev->wext.ibss.channel_fixed = true;
|
|
} else {
|
|
/* cfg80211_ibss_wext_join will pick one if needed */
|
|
wdev->wext.ibss.channel_fixed = false;
|
|
}
|
|
|
|
return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);
|
|
|
|
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;
|
|
|
|
if (wdev->current_bss)
|
|
chan = wdev->current_bss->channel;
|
|
else if (wdev->wext.ibss.channel)
|
|
chan = wdev->wext.ibss.channel;
|
|
|
|
if (chan) {
|
|
freq->m = chan->center_freq;
|
|
freq->e = 6;
|
|
return 0;
|
|
}
|
|
|
|
/* no channel if not joining */
|
|
return -EINVAL;
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);
|
|
|
|
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;
|
|
size_t len = data->length;
|
|
int err;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (wdev->ssid_len) {
|
|
err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
|
|
dev, true);
|
|
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;
|
|
|
|
return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);
|
|
|
|
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;
|
|
u8 *bssid = ap_addr->sa_data;
|
|
int err;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
if (!wiphy_to_dev(wdev->wiphy)->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 &&
|
|
compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
|
|
return 0;
|
|
|
|
if (wdev->ssid_len) {
|
|
err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
|
|
dev, true);
|
|
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;
|
|
|
|
return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);
|
|
|
|
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;
|
|
|
|
if (wdev->wext.ibss.bssid) {
|
|
memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
|
|
return 0;
|
|
}
|
|
|
|
memcpy(ap_addr->sa_data, wdev->bssid, ETH_ALEN);
|
|
return 0;
|
|
}
|
|
/* temporary symbol - mark GPL - in the future the handler won't be */
|
|
EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwap);
|
|
#endif
|