v4.19.13 snapshot.
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
new file mode 100644
index 0000000..d1743e6
--- /dev/null
+++ b/net/wireless/ibss.c
@@ -0,0 +1,536 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 ieee80211_channel *channel)
+{
+ 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, channel, bssid, NULL, 0,
+ IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
+
+ 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);
+
+ if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
+ cfg80211_upload_connect_keys(wdev);
+
+ nl80211_send_ibss_bssid(wiphy_to_rdev(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,
+ struct ieee80211_channel *channel, gfp_t gfp)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+ struct cfg80211_event *ev;
+ unsigned long flags;
+
+ trace_cfg80211_ibss_joined(dev, bssid, channel);
+
+ if (WARN_ON(!channel))
+ return;
+
+ ev = kzalloc(sizeof(*ev), gfp);
+ if (!ev)
+ return;
+
+ ev->type = EVENT_IBSS_JOINED;
+ memcpy(ev->ij.bssid, bssid, ETH_ALEN);
+ ev->ij.channel = channel;
+
+ 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_RTNL();
+ 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 == NL80211_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(connkeys && connkeys->def < 0))
+ return -EINVAL;
+
+ if (WARN_ON(wdev->connect_keys))
+ kzfree(wdev->connect_keys);
+ wdev->connect_keys = connkeys;
+
+ wdev->ibss_fixed = params->channel_fixed;
+ wdev->ibss_dfs_possible = params->userspace_handles_dfs;
+ wdev->chandef = params->chandef;
+ if (connkeys) {
+ params->wep_keys = connkeys->params;
+ params->wep_tx_key = connkeys->def;
+ }
+
+#ifdef CONFIG_CFG80211_WEXT
+ wdev->wext.ibss.chandef = params->chandef;
+#endif
+ 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;
+}
+
+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_rdev(wdev->wiphy);
+ int i;
+
+ ASSERT_WDEV_LOCK(wdev);
+
+ kzfree(wdev->connect_keys);
+ wdev->connect_keys = NULL;
+
+ rdev_set_qos_map(rdev, dev, 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;
+ memset(&wdev->chandef, 0, sizeof(wdev->chandef));
+#ifdef CONFIG_CFG80211_WEXT
+ if (!nowext)
+ wdev->wext.ibss.ssid_len = 0;
+#endif
+ cfg80211_sched_dfs_chan_update(rdev);
+}
+
+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;
+
+ wdev->conn_owner_nlportid = 0;
+ __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 nl80211_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) {
+ struct ieee80211_channel *new_chan = NULL;
+
+ for (band = 0; band < NUM_NL80211_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_IR)
+ continue;
+ if (chan->flags & IEEE80211_CHAN_DISABLED)
+ continue;
+ new_chan = chan;
+ break;
+ }
+
+ if (new_chan)
+ break;
+ }
+
+ if (!new_chan)
+ return -EINVAL;
+
+ cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
+ NL80211_CHAN_NO_HT);
+ }
+
+ /* 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.ibss.privacy = wdev->wext.default_key != -1;
+
+ if (wdev->wext.keys && wdev->wext.keys->def != -1) {
+ ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
+ if (!ck)
+ return -ENOMEM;
+ for (i = 0; i < CFG80211_MAX_WEP_KEYS; 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_rdev(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(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_IR ||
+ 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) {
+ cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
+ NL80211_CHAN_NO_HT);
+ 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_rdev(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--;
+
+ memcpy(wdev->ssid, ssid, len);
+ wdev->wext.ibss.ssid = wdev->ssid;
+ 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_rdev(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;
+
+ if (bssid && !is_valid_ether_addr(bssid))
+ return -EINVAL;
+
+ /* 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
+ eth_zero_addr(ap_addr->sa_data);
+
+ wdev_unlock(wdev);
+
+ return 0;
+}
+#endif