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7ebbe6bd51
This variable isn't necessary -- the wext code keeps track of the BSSID itself, and otherwise we have current_bss. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
363 lines
8.6 KiB
C
363 lines
8.6 KiB
C
/*
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* Some IBSS support code for cfg80211.
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*
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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*/
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <net/cfg80211.h>
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#include "nl80211.h"
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void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid, gfp_t gfp)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_bss *bss;
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#ifdef CONFIG_WIRELESS_EXT
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union iwreq_data wrqu;
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#endif
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return;
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if (WARN_ON(!wdev->ssid_len))
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return;
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bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
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wdev->ssid, wdev->ssid_len,
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WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);
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if (WARN_ON(!bss))
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return;
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->current_bss);
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}
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cfg80211_hold_bss(bss);
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wdev->current_bss = bss;
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nl80211_send_ibss_bssid(wiphy_to_dev(wdev->wiphy), dev, bssid, gfp);
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#ifdef CONFIG_WIRELESS_EXT
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memset(&wrqu, 0, sizeof(wrqu));
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memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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#endif
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}
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EXPORT_SYMBOL(cfg80211_ibss_joined);
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int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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if (wdev->ssid_len)
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return -EALREADY;
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#ifdef CONFIG_WIRELESS_EXT
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wdev->wext.ibss.channel = params->channel;
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#endif
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err = rdev->ops->join_ibss(&rdev->wiphy, dev, params);
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if (err)
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return err;
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memcpy(wdev->ssid, params->ssid, params->ssid_len);
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wdev->ssid_len = params->ssid_len;
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return 0;
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}
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void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->current_bss);
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}
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wdev->current_bss = NULL;
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wdev->ssid_len = 0;
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#ifdef CONFIG_WIRELESS_EXT
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if (!nowext)
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wdev->wext.ibss.ssid_len = 0;
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#endif
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}
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int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext)
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{
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int err;
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err = rdev->ops->leave_ibss(&rdev->wiphy, dev);
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if (err)
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return err;
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cfg80211_clear_ibss(dev, nowext);
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return 0;
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}
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#ifdef CONFIG_WIRELESS_EXT
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static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev)
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{
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enum ieee80211_band band;
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int i;
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if (!wdev->wext.ibss.beacon_interval)
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wdev->wext.ibss.beacon_interval = 100;
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/* try to find an IBSS channel if none requested ... */
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if (!wdev->wext.ibss.channel) {
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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struct ieee80211_supported_band *sband;
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struct ieee80211_channel *chan;
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sband = rdev->wiphy.bands[band];
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if (!sband)
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continue;
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for (i = 0; i < sband->n_channels; i++) {
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chan = &sband->channels[i];
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if (chan->flags & IEEE80211_CHAN_NO_IBSS)
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continue;
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if (chan->flags & IEEE80211_CHAN_DISABLED)
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continue;
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wdev->wext.ibss.channel = chan;
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break;
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}
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if (wdev->wext.ibss.channel)
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break;
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}
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if (!wdev->wext.ibss.channel)
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return -EINVAL;
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}
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/* don't join -- SSID is not there */
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if (!wdev->wext.ibss.ssid_len)
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return 0;
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if (!netif_running(wdev->netdev))
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return 0;
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return cfg80211_join_ibss(wiphy_to_dev(wdev->wiphy),
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wdev->netdev, &wdev->wext.ibss);
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}
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int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_freq *freq, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct ieee80211_channel *chan;
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int err;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
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return -EOPNOTSUPP;
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chan = cfg80211_wext_freq(wdev->wiphy, freq);
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if (chan && IS_ERR(chan))
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return PTR_ERR(chan);
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if (chan &&
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(chan->flags & IEEE80211_CHAN_NO_IBSS ||
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chan->flags & IEEE80211_CHAN_DISABLED))
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return -EINVAL;
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if (wdev->wext.ibss.channel == chan)
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return 0;
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if (wdev->ssid_len) {
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err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
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dev, true);
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if (err)
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return err;
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}
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if (chan) {
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wdev->wext.ibss.channel = chan;
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wdev->wext.ibss.channel_fixed = true;
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} else {
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/* cfg80211_ibss_wext_join will pick one if needed */
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wdev->wext.ibss.channel_fixed = false;
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}
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return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);
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int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_freq *freq, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct ieee80211_channel *chan = NULL;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (wdev->current_bss)
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chan = wdev->current_bss->channel;
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else if (wdev->wext.ibss.channel)
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chan = wdev->wext.ibss.channel;
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if (chan) {
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freq->m = chan->center_freq;
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freq->e = 6;
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return 0;
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}
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/* no channel if not joining */
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return -EINVAL;
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);
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int cfg80211_ibss_wext_siwessid(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_point *data, char *ssid)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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size_t len = data->length;
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int err;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
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return -EOPNOTSUPP;
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if (wdev->ssid_len) {
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err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
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dev, true);
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if (err)
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return err;
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}
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/* iwconfig uses nul termination in SSID.. */
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if (len > 0 && ssid[len - 1] == '\0')
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len--;
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wdev->wext.ibss.ssid = wdev->ssid;
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memcpy(wdev->wext.ibss.ssid, ssid, len);
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wdev->wext.ibss.ssid_len = len;
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return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwessid);
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int cfg80211_ibss_wext_giwessid(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_point *data, char *ssid)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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data->flags = 0;
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if (wdev->ssid_len) {
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data->flags = 1;
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data->length = wdev->ssid_len;
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memcpy(ssid, wdev->ssid, data->length);
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} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
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data->flags = 1;
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data->length = wdev->wext.ibss.ssid_len;
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memcpy(ssid, wdev->wext.ibss.ssid, data->length);
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}
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return 0;
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwessid);
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int cfg80211_ibss_wext_siwap(struct net_device *dev,
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struct iw_request_info *info,
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struct sockaddr *ap_addr, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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u8 *bssid = ap_addr->sa_data;
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int err;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!wiphy_to_dev(wdev->wiphy)->ops->join_ibss)
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return -EOPNOTSUPP;
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if (ap_addr->sa_family != ARPHRD_ETHER)
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return -EINVAL;
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/* automatic mode */
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if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
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bssid = NULL;
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/* both automatic */
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if (!bssid && !wdev->wext.ibss.bssid)
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return 0;
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/* fixed already - and no change */
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if (wdev->wext.ibss.bssid && bssid &&
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compare_ether_addr(bssid, wdev->wext.ibss.bssid) == 0)
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return 0;
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if (wdev->ssid_len) {
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err = cfg80211_leave_ibss(wiphy_to_dev(wdev->wiphy),
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dev, true);
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if (err)
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return err;
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}
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if (bssid) {
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memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
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wdev->wext.ibss.bssid = wdev->wext.bssid;
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} else
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wdev->wext.ibss.bssid = NULL;
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return cfg80211_ibss_wext_join(wiphy_to_dev(wdev->wiphy), wdev);
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwap);
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int cfg80211_ibss_wext_giwap(struct net_device *dev,
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struct iw_request_info *info,
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struct sockaddr *ap_addr, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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ap_addr->sa_family = ARPHRD_ETHER;
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if (wdev->current_bss)
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memcpy(ap_addr->sa_data, wdev->current_bss->bssid, ETH_ALEN);
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else
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memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
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return 0;
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}
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/* temporary symbol - mark GPL - in the future the handler won't be */
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EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwap);
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#endif
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