#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
+#define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ)
#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
-
-static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
- const u8 *bssid, const int beacon_int,
- struct cfg80211_chan_def *req_chandef,
- const u32 basic_rates,
- const u16 capability, u64 tsf,
- bool creator)
+static struct beacon_data *
+ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
+ const int beacon_int, const u32 basic_rates,
+ const u16 capability, u64 tsf,
+ struct cfg80211_chan_def *chandef,
+ bool *have_higher_than_11mbit,
+ struct cfg80211_csa_settings *csa_settings)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
struct ieee80211_local *local = sdata->local;
- int rates, i;
+ int rates_n = 0, i, ri;
struct ieee80211_mgmt *mgmt;
u8 *pos;
struct ieee80211_supported_band *sband;
- struct cfg80211_bss *bss;
- u32 bss_change;
- u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
- struct cfg80211_chan_def chandef;
- struct ieee80211_channel *chan;
+ u32 rate_flags, rates = 0, rates_added = 0;
struct beacon_data *presp;
int frame_len;
-
- sdata_assert_lock(sdata);
-
- /* Reset own TSF to allow time synchronization work. */
- drv_reset_tsf(local, sdata);
-
- if (!ether_addr_equal(ifibss->bssid, bssid))
- sta_info_flush(sdata);
-
- /* if merging, indicate to driver that we leave the old IBSS */
- if (sdata->vif.bss_conf.ibss_joined) {
- sdata->vif.bss_conf.ibss_joined = false;
- sdata->vif.bss_conf.ibss_creator = false;
- sdata->vif.bss_conf.enable_beacon = false;
- netif_carrier_off(sdata->dev);
- ieee80211_bss_info_change_notify(sdata,
- BSS_CHANGED_IBSS |
- BSS_CHANGED_BEACON_ENABLED);
- }
-
- presp = rcu_dereference_protected(ifibss->presp,
- lockdep_is_held(&sdata->wdev.mtx));
- rcu_assign_pointer(ifibss->presp, NULL);
- if (presp)
- kfree_rcu(presp, rcu_head);
-
- sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
-
- /* make a copy of the chandef, it could be modified below. */
- chandef = *req_chandef;
- chan = chandef.chan;
- if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
- chandef.width = NL80211_CHAN_WIDTH_20;
- chandef.center_freq1 = chan->center_freq;
- }
-
- ieee80211_vif_release_channel(sdata);
- if (ieee80211_vif_use_channel(sdata, &chandef,
- ifibss->fixed_channel ?
- IEEE80211_CHANCTX_SHARED :
- IEEE80211_CHANCTX_EXCLUSIVE)) {
- sdata_info(sdata, "Failed to join IBSS, no channel context\n");
- return;
- }
-
- memcpy(ifibss->bssid, bssid, ETH_ALEN);
-
- sband = local->hw.wiphy->bands[chan->band];
+ int shift;
/* Build IBSS probe response */
frame_len = sizeof(struct ieee80211_hdr_3addr) +
2 + 8 /* max Supported Rates */ +
3 /* max DS params */ +
4 /* IBSS params */ +
+ 5 /* Channel Switch Announcement */ +
2 + (IEEE80211_MAX_SUPP_RATES - 8) +
2 + sizeof(struct ieee80211_ht_cap) +
2 + sizeof(struct ieee80211_ht_operation) +
ifibss->ie_len;
presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL);
if (!presp)
- return;
+ return NULL;
presp->head = (void *)(presp + 1);
memcpy(pos, ifibss->ssid, ifibss->ssid_len);
pos += ifibss->ssid_len;
- rates = min_t(int, 8, sband->n_bitrates);
+ sband = local->hw.wiphy->bands[chandef->chan->band];
+ rate_flags = ieee80211_chandef_rate_flags(chandef);
+ shift = ieee80211_chandef_get_shift(chandef);
+ rates_n = 0;
+ if (have_higher_than_11mbit)
+ *have_higher_than_11mbit = false;
+
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+ continue;
+ if (sband->bitrates[i].bitrate > 110 &&
+ have_higher_than_11mbit)
+ *have_higher_than_11mbit = true;
+
+ rates |= BIT(i);
+ rates_n++;
+ }
+
*pos++ = WLAN_EID_SUPP_RATES;
- *pos++ = rates;
- for (i = 0; i < rates; i++) {
- int rate = sband->bitrates[i].bitrate;
+ *pos++ = min_t(int, 8, rates_n);
+ for (ri = 0; ri < sband->n_bitrates; ri++) {
+ int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate,
+ 5 * (1 << shift));
u8 basic = 0;
- if (basic_rates & BIT(i))
+ if (!(rates & BIT(ri)))
+ continue;
+
+ if (basic_rates & BIT(ri))
basic = 0x80;
- *pos++ = basic | (u8) (rate / 5);
+ *pos++ = basic | (u8) rate;
+ if (++rates_added == 8) {
+ ri++; /* continue at next rate for EXT_SUPP_RATES */
+ break;
+ }
}
if (sband->band == IEEE80211_BAND_2GHZ) {
*pos++ = WLAN_EID_DS_PARAMS;
*pos++ = 1;
- *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
+ *pos++ = ieee80211_frequency_to_channel(
+ chandef->chan->center_freq);
}
*pos++ = WLAN_EID_IBSS_PARAMS;
*pos++ = 0;
*pos++ = 0;
- if (sband->n_bitrates > 8) {
+ if (csa_settings) {
+ *pos++ = WLAN_EID_CHANNEL_SWITCH;
+ *pos++ = 3;
+ *pos++ = csa_settings->block_tx ? 1 : 0;
+ *pos++ = ieee80211_frequency_to_channel(
+ csa_settings->chandef.chan->center_freq);
+ sdata->csa_counter_offset_beacon = (pos - presp->head);
+ *pos++ = csa_settings->count;
+ }
+
+ /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */
+ if (rates_n > 8) {
*pos++ = WLAN_EID_EXT_SUPP_RATES;
- *pos++ = sband->n_bitrates - 8;
- for (i = 8; i < sband->n_bitrates; i++) {
- int rate = sband->bitrates[i].bitrate;
+ *pos++ = rates_n - 8;
+ for (; ri < sband->n_bitrates; ri++) {
+ int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate,
+ 5 * (1 << shift));
u8 basic = 0;
- if (basic_rates & BIT(i))
+ if (!(rates & BIT(ri)))
+ continue;
+
+ if (basic_rates & BIT(ri))
basic = 0x80;
- *pos++ = basic | (u8) (rate / 5);
+ *pos++ = basic | (u8) rate;
}
}
}
/* add HT capability and information IEs */
- if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
- chandef.width != NL80211_CHAN_WIDTH_5 &&
- chandef.width != NL80211_CHAN_WIDTH_10 &&
+ if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
+ chandef->width != NL80211_CHAN_WIDTH_5 &&
+ chandef->width != NL80211_CHAN_WIDTH_10 &&
sband->ht_cap.ht_supported) {
- pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
- sband->ht_cap.cap);
+ struct ieee80211_sta_ht_cap ht_cap;
+
+ memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
+ ieee80211_apply_htcap_overrides(sdata, &ht_cap);
+
+ pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
/*
* Note: According to 802.11n-2009 9.13.3.1, HT Protection
* field and RIFS Mode are reserved in IBSS mode, therefore
* keep them at 0
*/
pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap,
- &chandef, 0);
+ chandef, 0);
}
if (local->hw.queues >= IEEE80211_NUM_ACS) {
presp->head_len = pos - presp->head;
if (WARN_ON(presp->head_len > frame_len))
+ goto error;
+
+ return presp;
+error:
+ kfree(presp);
+ return NULL;
+}
+
+static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+ const u8 *bssid, const int beacon_int,
+ struct cfg80211_chan_def *req_chandef,
+ const u32 basic_rates,
+ const u16 capability, u64 tsf,
+ bool creator)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_mgmt *mgmt;
+ struct cfg80211_bss *bss;
+ u32 bss_change;
+ struct cfg80211_chan_def chandef;
+ struct ieee80211_channel *chan;
+ struct beacon_data *presp;
+ enum nl80211_bss_scan_width scan_width;
+ bool have_higher_than_11mbit;
+ bool radar_required = false;
+ int err;
+
+ sdata_assert_lock(sdata);
+
+ /* Reset own TSF to allow time synchronization work. */
+ drv_reset_tsf(local, sdata);
+
+ if (!ether_addr_equal(ifibss->bssid, bssid))
+ sta_info_flush(sdata);
+
+ /* if merging, indicate to driver that we leave the old IBSS */
+ if (sdata->vif.bss_conf.ibss_joined) {
+ sdata->vif.bss_conf.ibss_joined = false;
+ sdata->vif.bss_conf.ibss_creator = false;
+ sdata->vif.bss_conf.enable_beacon = false;
+ netif_carrier_off(sdata->dev);
+ ieee80211_bss_info_change_notify(sdata,
+ BSS_CHANGED_IBSS |
+ BSS_CHANGED_BEACON_ENABLED);
+ drv_leave_ibss(local, sdata);
+ }
+
+ presp = rcu_dereference_protected(ifibss->presp,
+ lockdep_is_held(&sdata->wdev.mtx));
+ rcu_assign_pointer(ifibss->presp, NULL);
+ if (presp)
+ kfree_rcu(presp, rcu_head);
+
+ sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
+
+ /* make a copy of the chandef, it could be modified below. */
+ chandef = *req_chandef;
+ chan = chandef.chan;
+ if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
+ if (chandef.width == NL80211_CHAN_WIDTH_5 ||
+ chandef.width == NL80211_CHAN_WIDTH_10 ||
+ chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
+ chandef.width == NL80211_CHAN_WIDTH_20) {
+ sdata_info(sdata,
+ "Failed to join IBSS, beacons forbidden\n");
+ return;
+ }
+ chandef.width = NL80211_CHAN_WIDTH_20;
+ chandef.center_freq1 = chan->center_freq;
+ /* check again for downgraded chandef */
+ if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
+ sdata_info(sdata,
+ "Failed to join IBSS, beacons forbidden\n");
+ return;
+ }
+ }
+
+ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
+ &chandef);
+ if (err > 0) {
+ if (!ifibss->userspace_handles_dfs) {
+ sdata_info(sdata,
+ "Failed to join IBSS, DFS channel without control program\n");
+ return;
+ }
+ radar_required = true;
+ }
+
+ ieee80211_vif_release_channel(sdata);
+ if (ieee80211_vif_use_channel(sdata, &chandef,
+ ifibss->fixed_channel ?
+ IEEE80211_CHANCTX_SHARED :
+ IEEE80211_CHANCTX_EXCLUSIVE)) {
+ sdata_info(sdata, "Failed to join IBSS, no channel context\n");
+ return;
+ }
+
+ memcpy(ifibss->bssid, bssid, ETH_ALEN);
+
+ sband = local->hw.wiphy->bands[chan->band];
+
+ presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates,
+ capability, tsf, &chandef,
+ &have_higher_than_11mbit, NULL);
+ if (!presp)
return;
rcu_assign_pointer(ifibss->presp, presp);
+ mgmt = (void *)presp->head;
+ sdata->radar_required = radar_required;
sdata->vif.bss_conf.enable_beacon = true;
sdata->vif.bss_conf.beacon_int = beacon_int;
sdata->vif.bss_conf.basic_rates = basic_rates;
sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ;
bss_change |= BSS_CHANGED_ERP_SLOT;
- sdata->vif.bss_conf.ibss_joined = true;
- sdata->vif.bss_conf.ibss_creator = creator;
- ieee80211_bss_info_change_notify(sdata, bss_change);
+ /* cf. IEEE 802.11 9.2.12 */
+ if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit)
+ sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+ else
+ sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+
+ ieee80211_set_wmm_default(sdata, true);
+
+ sdata->vif.bss_conf.ibss_joined = true;
+ sdata->vif.bss_conf.ibss_creator = creator;
+
+ err = drv_join_ibss(local, sdata);
+ if (err) {
+ sdata->vif.bss_conf.ibss_joined = false;
+ sdata->vif.bss_conf.ibss_creator = false;
+ sdata->vif.bss_conf.enable_beacon = false;
+ sdata->vif.bss_conf.ssid_len = 0;
+ RCU_INIT_POINTER(ifibss->presp, NULL);
+ kfree_rcu(presp, rcu_head);
+ ieee80211_vif_release_channel(sdata);
+ sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n",
+ err);
+ return;
+ }
+
+ ieee80211_bss_info_change_notify(sdata, bss_change);
+
+ ifibss->state = IEEE80211_IBSS_MLME_JOINED;
+ mod_timer(&ifibss->timer,
+ round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
+
+ scan_width = cfg80211_chandef_to_scan_width(&chandef);
+ bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan,
+ scan_width, mgmt,
+ presp->head_len, 0, GFP_KERNEL);
+ cfg80211_put_bss(local->hw.wiphy, bss);
+ netif_carrier_on(sdata->dev);
+ cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
+}
+
+static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_bss *bss)
+{
+ struct cfg80211_bss *cbss =
+ container_of((void *)bss, struct cfg80211_bss, priv);
+ struct ieee80211_supported_band *sband;
+ struct cfg80211_chan_def chandef;
+ u32 basic_rates;
+ int i, j;
+ u16 beacon_int = cbss->beacon_interval;
+ const struct cfg80211_bss_ies *ies;
+ enum nl80211_channel_type chan_type;
+ u64 tsf;
+ u32 rate_flags;
+ int shift;
+
+ sdata_assert_lock(sdata);
+
+ if (beacon_int < 10)
+ beacon_int = 10;
+
+ switch (sdata->u.ibss.chandef.width) {
+ case NL80211_CHAN_WIDTH_20_NOHT:
+ case NL80211_CHAN_WIDTH_20:
+ case NL80211_CHAN_WIDTH_40:
+ chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef);
+ cfg80211_chandef_create(&chandef, cbss->channel, chan_type);
+ break;
+ case NL80211_CHAN_WIDTH_5:
+ case NL80211_CHAN_WIDTH_10:
+ cfg80211_chandef_create(&chandef, cbss->channel,
+ NL80211_CHAN_WIDTH_20_NOHT);
+ chandef.width = sdata->u.ibss.chandef.width;
+ break;
+ default:
+ /* fall back to 20 MHz for unsupported modes */
+ cfg80211_chandef_create(&chandef, cbss->channel,
+ NL80211_CHAN_WIDTH_20_NOHT);
+ break;
+ }
+
+ sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
+ rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef);
+ shift = ieee80211_vif_get_shift(&sdata->vif);
+
+ basic_rates = 0;
+
+ for (i = 0; i < bss->supp_rates_len; i++) {
+ int rate = bss->supp_rates[i] & 0x7f;
+ bool is_basic = !!(bss->supp_rates[i] & 0x80);
+
+ for (j = 0; j < sband->n_bitrates; j++) {
+ int brate;
+ if ((rate_flags & sband->bitrates[j].flags)
+ != rate_flags)
+ continue;
+
+ brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
+ 5 * (1 << shift));
+ if (brate == rate) {
+ if (is_basic)
+ basic_rates |= BIT(j);
+ break;
+ }
+ }
+ }
+
+ rcu_read_lock();
+ ies = rcu_dereference(cbss->ies);
+ tsf = ies->tsf;
+ rcu_read_unlock();
+
+ __ieee80211_sta_join_ibss(sdata, cbss->bssid,
+ beacon_int,
+ &chandef,
+ basic_rates,
+ cbss->capability,
+ tsf, false);
+}
+
+static int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_csa_settings *csa_settings)
+{
+ struct sk_buff *skb;
+ struct ieee80211_mgmt *mgmt;
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_local *local = sdata->local;
+ int freq;
+ int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
+ sizeof(mgmt->u.action.u.chan_switch);
+ u8 *pos;
+
+ skb = dev_alloc_skb(local->tx_headroom + hdr_len +
+ 5 + /* channel switch announcement element */
+ 3); /* secondary channel offset element */
+ if (!skb)
+ return -1;
+
+ skb_reserve(skb, local->tx_headroom);
+ mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
+ memset(mgmt, 0, hdr_len);
+ mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+ IEEE80211_STYPE_ACTION);
+
+ eth_broadcast_addr(mgmt->da);
+ memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+ memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
+ mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
+ mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
+ pos = skb_put(skb, 5);
+ *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
+ *pos++ = 3; /* IE length */
+ *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
+ freq = csa_settings->chandef.chan->center_freq;
+ *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
+ *pos++ = csa_settings->count; /* count */
+
+ if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
+ enum nl80211_channel_type ch_type;
+
+ skb_put(skb, 3);
+ *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
+ *pos++ = 1; /* IE length */
+ ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
+ if (ch_type == NL80211_CHAN_HT40PLUS)
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+ else
+ *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+ }
+
+ ieee80211_tx_skb(sdata, skb);
+ return 0;
+}
+
+int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
+ struct cfg80211_csa_settings *csa_settings)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct beacon_data *presp, *old_presp;
+ struct cfg80211_bss *cbss;
+ const struct cfg80211_bss_ies *ies;
+ u16 capability;
+ u64 tsf;
+ int ret = 0;
+
+ sdata_assert_lock(sdata);
+
+ capability = WLAN_CAPABILITY_IBSS;
+
+ if (ifibss->privacy)
+ capability |= WLAN_CAPABILITY_PRIVACY;
+
+ cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan,
+ ifibss->bssid, ifibss->ssid,
+ ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+ WLAN_CAPABILITY_PRIVACY,
+ capability);
+
+ if (WARN_ON(!cbss)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ rcu_read_lock();
+ ies = rcu_dereference(cbss->ies);
+ tsf = ies->tsf;
+ rcu_read_unlock();
+ cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
+
+ old_presp = rcu_dereference_protected(ifibss->presp,
+ lockdep_is_held(&sdata->wdev.mtx));
+
+ presp = ieee80211_ibss_build_presp(sdata,
+ sdata->vif.bss_conf.beacon_int,
+ sdata->vif.bss_conf.basic_rates,
+ capability, tsf, &ifibss->chandef,
+ NULL, csa_settings);
+ if (!presp) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ rcu_assign_pointer(ifibss->presp, presp);
+ if (old_presp)
+ kfree_rcu(old_presp, rcu_head);
+
+ /* it might not send the beacon for a while. send an action frame
+ * immediately to announce the channel switch.
+ */
+ if (csa_settings)
+ ieee80211_send_action_csa(sdata, csa_settings);
+
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
+ out:
+ return ret;
+}
+
+int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct cfg80211_bss *cbss;
+ int err;
+ u16 capability;
+
+ sdata_lock(sdata);
+ /* update cfg80211 bss information with the new channel */
+ if (!is_zero_ether_addr(ifibss->bssid)) {
+ capability = WLAN_CAPABILITY_IBSS;
+
+ if (ifibss->privacy)
+ capability |= WLAN_CAPABILITY_PRIVACY;
+
+ cbss = cfg80211_get_bss(sdata->local->hw.wiphy,
+ ifibss->chandef.chan,
+ ifibss->bssid, ifibss->ssid,
+ ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+ WLAN_CAPABILITY_PRIVACY,
+ capability);
+ /* XXX: should not really modify cfg80211 data */
+ if (cbss) {
+ cbss->channel = sdata->local->csa_chandef.chan;
+ cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
+ }
+ }
+
+ ifibss->chandef = sdata->local->csa_chandef;
+
+ /* generate the beacon */
+ err = ieee80211_ibss_csa_beacon(sdata, NULL);
+ sdata_unlock(sdata);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+
+ cancel_work_sync(&ifibss->csa_connection_drop_work);
+}
+
+static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta)
+ __acquires(RCU)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ u8 addr[ETH_ALEN];
+
+ memcpy(addr, sta->sta.addr, ETH_ALEN);
+
+ ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr);
+
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
+ sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
+ /* authorize the station only if the network is not RSN protected. If
+ * not wait for the userspace to authorize it */
+ if (!sta->sdata->u.ibss.control_port)
+ sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+
+ rate_control_rate_init(sta);
+
+ /* If it fails, maybe we raced another insertion? */
+ if (sta_info_insert_rcu(sta))
+ return sta_info_get(sdata, addr);
+ return sta;
+}
+
+static struct sta_info *
+ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid,
+ const u8 *addr, u32 supp_rates)
+ __acquires(RCU)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ struct ieee80211_supported_band *sband;
+ enum nl80211_bss_scan_width scan_width;
+ int band;
+
+ /*
+ * XXX: Consider removing the least recently used entry and
+ * allow new one to be added.
+ */
+ if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
+ net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
+ sdata->name, addr);
+ rcu_read_lock();
+ return NULL;
+ }
+
+ if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) {
+ rcu_read_lock();
+ return NULL;
+ }
+
+ if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) {
+ rcu_read_lock();
+ return NULL;
+ }
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (WARN_ON_ONCE(!chanctx_conf))
+ return NULL;
+ band = chanctx_conf->def.chan->band;
+ scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
+ rcu_read_unlock();
+
+ sta = sta_info_alloc(sdata, addr, GFP_KERNEL);
+ if (!sta) {
+ rcu_read_lock();
+ return NULL;
+ }
+
+ sta->last_rx = jiffies;
+
+ /* make sure mandatory rates are always added */
+ sband = local->hw.wiphy->bands[band];
+ sta->sta.supp_rates[band] = supp_rates |
+ ieee80211_mandatory_rates(sband, scan_width);
+
+ return ieee80211_ibss_finish_sta(sta);
+}
+
+static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ int active = 0;
+ struct sta_info *sta;
+
+ sdata_assert_lock(sdata);
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ if (sta->sdata == sdata &&
+ time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
+ jiffies)) {
+ active++;
+ break;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return active;
+}
+
+static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_local *local = sdata->local;
+ struct cfg80211_bss *cbss;
+ struct beacon_data *presp;
+ struct sta_info *sta;
+ int active_ibss;
+ u16 capability;
+
+ active_ibss = ieee80211_sta_active_ibss(sdata);
+
+ if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
+ capability = WLAN_CAPABILITY_IBSS;
+
+ if (ifibss->privacy)
+ capability |= WLAN_CAPABILITY_PRIVACY;
+
+ cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan,
+ ifibss->bssid, ifibss->ssid,
+ ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
+ WLAN_CAPABILITY_PRIVACY,
+ capability);
+
+ if (cbss) {
+ cfg80211_unlink_bss(local->hw.wiphy, cbss);
+ cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
+ }
+ }
+
+ ifibss->state = IEEE80211_IBSS_MLME_SEARCH;
+
+ sta_info_flush(sdata);
+
+ spin_lock_bh(&ifibss->incomplete_lock);
+ while (!list_empty(&ifibss->incomplete_stations)) {
+ sta = list_first_entry(&ifibss->incomplete_stations,
+ struct sta_info, list);
+ list_del(&sta->list);
+ spin_unlock_bh(&ifibss->incomplete_lock);
+
+ sta_info_free(local, sta);
+ spin_lock_bh(&ifibss->incomplete_lock);
+ }
+ spin_unlock_bh(&ifibss->incomplete_lock);
+
+ netif_carrier_off(sdata->dev);
+
+ sdata->vif.bss_conf.ibss_joined = false;
+ sdata->vif.bss_conf.ibss_creator = false;
+ sdata->vif.bss_conf.enable_beacon = false;
+ sdata->vif.bss_conf.ssid_len = 0;
+
+ /* remove beacon */
+ presp = rcu_dereference_protected(ifibss->presp,
+ lockdep_is_held(&sdata->wdev.mtx));
+ RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
+ if (presp)
+ kfree_rcu(presp, rcu_head);
+
+ clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
+ BSS_CHANGED_IBSS);
+ drv_leave_ibss(local, sdata);
+ ieee80211_vif_release_channel(sdata);
+}
+
+static void ieee80211_csa_connection_drop_work(struct work_struct *work)
+{
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data,
+ u.ibss.csa_connection_drop_work);
+
+ ieee80211_ibss_disconnect(sdata);
+ synchronize_rcu();
+ skb_queue_purge(&sdata->skb_queue);
+
+ /* trigger a scan to find another IBSS network to join */
+ ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ int err;
+
+ /* if the current channel is a DFS channel, mark the channel as
+ * unavailable.
+ */
+ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
+ &ifibss->chandef);
+ if (err > 0)
+ cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef,
+ GFP_ATOMIC);
+}
+
+static bool
+ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
+ struct ieee802_11_elems *elems,
+ bool beacon)
+{
+ struct cfg80211_csa_settings params;
+ struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ struct ieee80211_chanctx *chanctx;
+ enum nl80211_channel_type ch_type;
+ int err, num_chanctx;
+ u32 sta_flags;
+ u8 mode;
+
+ if (sdata->vif.csa_active)
+ return true;
- ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates);
+ if (!sdata->vif.bss_conf.ibss_joined)
+ return false;
- ifibss->state = IEEE80211_IBSS_MLME_JOINED;
- mod_timer(&ifibss->timer,
- round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
+ sta_flags = IEEE80211_STA_DISABLE_VHT;
+ switch (ifibss->chandef.width) {
+ case NL80211_CHAN_WIDTH_5:
+ case NL80211_CHAN_WIDTH_10:
+ case NL80211_CHAN_WIDTH_20_NOHT:
+ sta_flags |= IEEE80211_STA_DISABLE_HT;
+ /* fall through */
+ case NL80211_CHAN_WIDTH_20:
+ sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
+ break;
+ default:
+ break;
+ }
- bss = cfg80211_inform_bss_frame(local->hw.wiphy, chan,
- mgmt, presp->head_len, 0, GFP_KERNEL);
- cfg80211_put_bss(local->hw.wiphy, bss);
- netif_carrier_on(sdata->dev);
- cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL);
-}
+ memset(¶ms, 0, sizeof(params));
+ err = ieee80211_parse_ch_switch_ie(sdata, elems, beacon,
+ ifibss->chandef.chan->band,
+ sta_flags, ifibss->bssid,
+ ¶ms.count, &mode,
+ ¶ms.chandef);
-static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_bss *bss)
-{
- struct cfg80211_bss *cbss =
- container_of((void *)bss, struct cfg80211_bss, priv);
- struct ieee80211_supported_band *sband;
- struct cfg80211_chan_def chandef;
- u32 basic_rates;
- int i, j;
- u16 beacon_int = cbss->beacon_interval;
- const struct cfg80211_bss_ies *ies;
- enum nl80211_channel_type chan_type;
- u64 tsf;
+ /* can't switch to destination channel, fail */
+ if (err < 0)
+ goto disconnect;
- sdata_assert_lock(sdata);
+ /* did not contain a CSA */
+ if (err)
+ return false;
- if (beacon_int < 10)
- beacon_int = 10;
+ if (ifibss->chandef.chan->band != params.chandef.chan->band)
+ goto disconnect;
- switch (sdata->u.ibss.chandef.width) {
+ switch (ifibss->chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_40:
- chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef);
- cfg80211_chandef_create(&chandef, cbss->channel, chan_type);
+ /* keep our current HT mode (HT20/HT40+/HT40-), even if
+ * another mode has been announced. The mode is not adopted
+ * within the beacon while doing CSA and we should therefore
+ * keep the mode which we announce.
+ */
+ ch_type = cfg80211_get_chandef_type(&ifibss->chandef);
+ cfg80211_chandef_create(¶ms.chandef, params.chandef.chan,
+ ch_type);
break;
case NL80211_CHAN_WIDTH_5:
case NL80211_CHAN_WIDTH_10:
- cfg80211_chandef_create(&chandef, cbss->channel,
- NL80211_CHAN_WIDTH_20_NOHT);
- chandef.width = sdata->u.ibss.chandef.width;
+ if (params.chandef.width != ifibss->chandef.width) {
+ sdata_info(sdata,
+ "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
+ ifibss->bssid,
+ params.chandef.chan->center_freq,
+ params.chandef.width,
+ params.chandef.center_freq1,
+ params.chandef.center_freq2);
+ goto disconnect;
+ }
break;
default:
- /* fall back to 20 MHz for unsupported modes */
- cfg80211_chandef_create(&chandef, cbss->channel,
- NL80211_CHAN_WIDTH_20_NOHT);
- break;
+ /* should not happen, sta_flags should prevent VHT modes. */
+ WARN_ON(1);
+ goto disconnect;
}
- sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
-
- basic_rates = 0;
+ if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef)) {
+ sdata_info(sdata,
+ "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
+ ifibss->bssid,
+ params.chandef.chan->center_freq,
+ params.chandef.width,
+ params.chandef.center_freq1,
+ params.chandef.center_freq2);
+ goto disconnect;
+ }
- for (i = 0; i < bss->supp_rates_len; i++) {
- int rate = (bss->supp_rates[i] & 0x7f) * 5;
- bool is_basic = !!(bss->supp_rates[i] & 0x80);
+ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
+ ¶ms.chandef);
+ if (err < 0)
+ goto disconnect;
+ if (err) {
+ /* IBSS-DFS only allowed with a control program */
+ if (!ifibss->userspace_handles_dfs)
+ goto disconnect;
- for (j = 0; j < sband->n_bitrates; j++) {
- if (sband->bitrates[j].bitrate == rate) {
- if (is_basic)
- basic_rates |= BIT(j);
- break;
- }
- }
+ params.radar_required = true;
}
rcu_read_lock();
- ies = rcu_dereference(cbss->ies);
- tsf = ies->tsf;
- rcu_read_unlock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (!chanctx_conf) {
+ rcu_read_unlock();
+ goto disconnect;
+ }
- __ieee80211_sta_join_ibss(sdata, cbss->bssid,
- beacon_int,
- &chandef,
- basic_rates,
- cbss->capability,
- tsf, false);
-}
+ /* don't handle for multi-VIF cases */
+ chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
+ if (chanctx->refcount > 1) {
+ rcu_read_unlock();
+ goto disconnect;
+ }
+ num_chanctx = 0;
+ list_for_each_entry_rcu(chanctx, &sdata->local->chanctx_list, list)
+ num_chanctx++;
-static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta)
- __acquires(RCU)
-{
- struct ieee80211_sub_if_data *sdata = sta->sdata;
- u8 addr[ETH_ALEN];
+ if (num_chanctx > 1) {
+ rcu_read_unlock();
+ goto disconnect;
+ }
+ rcu_read_unlock();
- memcpy(addr, sta->sta.addr, ETH_ALEN);
+ /* all checks done, now perform the channel switch. */
+ ibss_dbg(sdata,
+ "received channel switch announcement to go to channel %d MHz\n",
+ params.chandef.chan->center_freq);
- ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr);
+ params.block_tx = !!mode;
- sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
- sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
- /* authorize the station only if the network is not RSN protected. If
- * not wait for the userspace to authorize it */
- if (!sta->sdata->u.ibss.control_port)
- sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
+ ieee80211_ibss_csa_beacon(sdata, ¶ms);
+ sdata->csa_radar_required = params.radar_required;
- rate_control_rate_init(sta);
+ if (params.block_tx)
+ ieee80211_stop_queues_by_reason(&sdata->local->hw,
+ IEEE80211_MAX_QUEUE_MAP,
+ IEEE80211_QUEUE_STOP_REASON_CSA);
- /* If it fails, maybe we raced another insertion? */
- if (sta_info_insert_rcu(sta))
- return sta_info_get(sdata, addr);
- return sta;
-}
+ sdata->local->csa_chandef = params.chandef;
+ sdata->vif.csa_active = true;
-static struct sta_info *
-ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid,
- const u8 *addr, u32 supp_rates)
- __acquires(RCU)
-{
- struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- struct ieee80211_local *local = sdata->local;
- struct sta_info *sta;
- struct ieee80211_chanctx_conf *chanctx_conf;
- struct ieee80211_supported_band *sband;
- int band;
+ ieee80211_bss_info_change_notify(sdata, err);
+ drv_channel_switch_beacon(sdata, ¶ms.chandef);
- /*
- * XXX: Consider removing the least recently used entry and
- * allow new one to be added.
- */
- if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
- net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
- sdata->name, addr);
- rcu_read_lock();
- return NULL;
- }
+ ieee80211_ibss_csa_mark_radar(sdata);
- if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) {
- rcu_read_lock();
- return NULL;
- }
+ return true;
+disconnect:
+ ibss_dbg(sdata, "Can't handle channel switch, disconnect\n");
+ ieee80211_queue_work(&sdata->local->hw,
+ &ifibss->csa_connection_drop_work);
- if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) {
- rcu_read_lock();
- return NULL;
- }
+ ieee80211_ibss_csa_mark_radar(sdata);
- rcu_read_lock();
- chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
- if (WARN_ON_ONCE(!chanctx_conf))
- return NULL;
- band = chanctx_conf->def.chan->band;
- rcu_read_unlock();
+ return true;
+}
- sta = sta_info_alloc(sdata, addr, GFP_KERNEL);
- if (!sta) {
- rcu_read_lock();
- return NULL;
- }
+static void
+ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_mgmt *mgmt, size_t len,
+ struct ieee80211_rx_status *rx_status,
+ struct ieee802_11_elems *elems)
+{
+ int required_len;
- sta->last_rx = jiffies;
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ return;
- /* make sure mandatory rates are always added */
- sband = local->hw.wiphy->bands[band];
- sta->sta.supp_rates[band] = supp_rates |
- ieee80211_mandatory_rates(sband);
+ /* CSA is the only action we handle for now */
+ if (mgmt->u.action.u.measurement.action_code !=
+ WLAN_ACTION_SPCT_CHL_SWITCH)
+ return;
- return ieee80211_ibss_finish_sta(sta);
+ required_len = IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.chan_switch);
+ if (len < required_len)
+ return;
+
+ ieee80211_ibss_process_chanswitch(sdata, elems, false);
}
static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata,
u64 beacon_timestamp, rx_timestamp;
u32 supp_rates = 0;
enum ieee80211_band band = rx_status->band;
+ enum nl80211_bss_scan_width scan_width;
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
bool rates_updated = false;
sta = sta_info_get(sdata, mgmt->sa);
if (elems->supp_rates) {
- supp_rates = ieee80211_sta_get_rates(local, elems,
+ supp_rates = ieee80211_sta_get_rates(sdata, elems,
band, NULL);
if (sta) {
u32 prev_rates;
prev_rates = sta->sta.supp_rates[band];
/* make sure mandatory rates are always added */
- sta->sta.supp_rates[band] = supp_rates |
- ieee80211_mandatory_rates(sband);
+ scan_width = NL80211_BSS_CHAN_WIDTH_20;
+ if (rx_status->flag & RX_FLAG_5MHZ)
+ scan_width = NL80211_BSS_CHAN_WIDTH_5;
+ if (rx_status->flag & RX_FLAG_10MHZ)
+ scan_width = NL80211_BSS_CHAN_WIDTH_10;
+ sta->sta.supp_rates[band] = supp_rates |
+ ieee80211_mandatory_rates(sband,
+ scan_width);
if (sta->sta.supp_rates[band] != prev_rates) {
ibss_dbg(sdata,
"updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n",
/* check if we need to merge IBSS */
- /* we use a fixed BSSID */
- if (sdata->u.ibss.fixed_bssid)
- goto put_bss;
-
/* not an IBSS */
if (!(cbss->capability & WLAN_CAPABILITY_IBSS))
goto put_bss;
sdata->u.ibss.ssid_len))
goto put_bss;
+ /* process channel switch */
+ if (ieee80211_ibss_process_chanswitch(sdata, elems, true))
+ goto put_bss;
+
/* same BSSID */
if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid))
goto put_bss;
+ /* we use a fixed BSSID */
+ if (sdata->u.ibss.fixed_bssid)
+ goto put_bss;
+
if (ieee80211_have_rx_timestamp(rx_status)) {
/* time when timestamp field was received */
rx_timestamp =
"beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n",
mgmt->bssid);
ieee80211_sta_join_ibss(sdata, bss);
- supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL);
+ supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL);
ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
supp_rates);
rcu_read_unlock();
struct sta_info *sta;
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_supported_band *sband;
+ enum nl80211_bss_scan_width scan_width;
int band;
/*
return;
}
band = chanctx_conf->def.chan->band;
+ scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
rcu_read_unlock();
sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
/* make sure mandatory rates are always added */
sband = local->hw.wiphy->bands[band];
sta->sta.supp_rates[band] = supp_rates |
- ieee80211_mandatory_rates(sband);
+ ieee80211_mandatory_rates(sband, scan_width);
spin_lock(&ifibss->incomplete_lock);
list_add(&sta->list, &ifibss->incomplete_stations);
ieee80211_queue_work(&local->hw, &sdata->work);
}
-static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
+static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
- int active = 0;
- struct sta_info *sta;
+ struct sta_info *sta, *tmp;
+ unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT;
+ unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT;
- sdata_assert_lock(sdata);
+ mutex_lock(&local->sta_mtx);
- rcu_read_lock();
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ if (sdata != sta->sdata)
+ continue;
- list_for_each_entry_rcu(sta, &local->sta_list, list) {
- if (sta->sdata == sdata &&
- time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
- jiffies)) {
- active++;
- break;
+ if (time_after(jiffies, sta->last_rx + exp_time) ||
+ (time_after(jiffies, sta->last_rx + exp_rsn_time) &&
+ sta->sta_state != IEEE80211_STA_AUTHORIZED)) {
+ sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",
+ sta->sta_state != IEEE80211_STA_AUTHORIZED ?
+ "not authorized " : "", sta->sta.addr);
+
+ WARN_ON(__sta_info_destroy(sta));
}
}
- rcu_read_unlock();
-
- return active;
+ mutex_unlock(&local->sta_mtx);
}
/*
static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+ enum nl80211_bss_scan_width scan_width;
sdata_assert_lock(sdata);
mod_timer(&ifibss->timer,
round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
- ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
+ ieee80211_ibss_sta_expire(sdata);
if (time_before(jiffies, ifibss->last_scan_completed +
IEEE80211_IBSS_MERGE_INTERVAL))
sdata_info(sdata,
"No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
+ scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len,
- NULL);
+ NULL, scan_width);
}
static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
struct cfg80211_bss *cbss;
struct ieee80211_channel *chan = NULL;
const u8 *bssid = NULL;
+ enum nl80211_bss_scan_width scan_width;
int active_ibss;
u16 capability;
return;
}
+ /* if a fixed bssid and a fixed freq have been provided create the IBSS
+ * directly and do not waste time scanning
+ */
+ if (ifibss->fixed_bssid && ifibss->fixed_channel) {
+ sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n",
+ bssid);
+ ieee80211_sta_create_ibss(sdata);
+ return;
+ }
+
+
ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n");
/* Selected IBSS not found in current scan results - try to scan */
IEEE80211_SCAN_INTERVAL)) {
sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
+ scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
ieee80211_request_ibss_scan(sdata, ifibss->ssid,
- ifibss->ssid_len, chan);
+ ifibss->ssid_len, chan,
+ scan_width);
} else {
int interval = IEEE80211_SCAN_INTERVAL;
struct ieee80211_rx_status *rx_status;
struct ieee80211_mgmt *mgmt;
u16 fc;
+ struct ieee802_11_elems elems;
+ int ies_len;
rx_status = IEEE80211_SKB_RXCB(skb);
mgmt = (struct ieee80211_mgmt *) skb->data;
case IEEE80211_STYPE_DEAUTH:
ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len);
break;
+ case IEEE80211_STYPE_ACTION:
+ switch (mgmt->u.action.category) {
+ case WLAN_CATEGORY_SPECTRUM_MGMT:
+ ies_len = skb->len -
+ offsetof(struct ieee80211_mgmt,
+ u.action.u.chan_switch.variable);
+
+ if (ies_len < 0)
+ break;
+
+ ieee802_11_parse_elems(
+ mgmt->u.action.u.chan_switch.variable,
+ ies_len, true, &elems);
+
+ if (elems.parse_error)
+ break;
+
+ ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len,
+ rx_status, &elems);
+ break;
+ }
}
mgmt_out:
(unsigned long) sdata);
INIT_LIST_HEAD(&ifibss->incomplete_stations);
spin_lock_init(&ifibss->incomplete_lock);
+ INIT_WORK(&ifibss->csa_connection_drop_work,
+ ieee80211_csa_connection_drop_work);
}
/* scan finished notification */
struct cfg80211_ibss_params *params)
{
u32 changed = 0;
+ u32 rate_flags;
+ struct ieee80211_supported_band *sband;
+ int i;
if (params->bssid) {
memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN);
sdata->u.ibss.privacy = params->privacy;
sdata->u.ibss.control_port = params->control_port;
+ sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs;
sdata->u.ibss.basic_rates = params->basic_rates;
+
+ /* fix basic_rates if channel does not support these rates */
+ rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef);
+ sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band];
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+ sdata->u.ibss.basic_rates &= ~BIT(i);
+ }
memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate,
sizeof(params->mcast_rate));
memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
sdata->u.ibss.ssid_len = params->ssid_len;
+ memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa,
+ sizeof(sdata->u.ibss.ht_capa));
+ memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask,
+ sizeof(sdata->u.ibss.ht_capa_mask));
+
/*
* 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is
* reserved, but an HT STA shall protect HT transmissions as though
int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
- struct ieee80211_local *local = sdata->local;
- struct cfg80211_bss *cbss;
- u16 capability;
- int active_ibss;
- struct sta_info *sta;
- struct beacon_data *presp;
-
- active_ibss = ieee80211_sta_active_ibss(sdata);
-
- if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) {
- capability = WLAN_CAPABILITY_IBSS;
-
- if (ifibss->privacy)
- capability |= WLAN_CAPABILITY_PRIVACY;
-
- cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan,
- ifibss->bssid, ifibss->ssid,
- ifibss->ssid_len, WLAN_CAPABILITY_IBSS |
- WLAN_CAPABILITY_PRIVACY,
- capability);
-
- if (cbss) {
- cfg80211_unlink_bss(local->hw.wiphy, cbss);
- cfg80211_put_bss(local->hw.wiphy, cbss);
- }
- }
- ifibss->state = IEEE80211_IBSS_MLME_SEARCH;
- memset(ifibss->bssid, 0, ETH_ALEN);
+ ieee80211_ibss_disconnect(sdata);
ifibss->ssid_len = 0;
-
- sta_info_flush(sdata);
-
- spin_lock_bh(&ifibss->incomplete_lock);
- while (!list_empty(&ifibss->incomplete_stations)) {
- sta = list_first_entry(&ifibss->incomplete_stations,
- struct sta_info, list);
- list_del(&sta->list);
- spin_unlock_bh(&ifibss->incomplete_lock);
-
- sta_info_free(local, sta);
- spin_lock_bh(&ifibss->incomplete_lock);
- }
- spin_unlock_bh(&ifibss->incomplete_lock);
-
- netif_carrier_off(sdata->dev);
+ memset(ifibss->bssid, 0, ETH_ALEN);
/* remove beacon */
kfree(sdata->u.ibss.ie);
- presp = rcu_dereference_protected(ifibss->presp,
- lockdep_is_held(&sdata->wdev.mtx));
- RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
- sdata->vif.bss_conf.ibss_joined = false;
- sdata->vif.bss_conf.ibss_creator = false;
- sdata->vif.bss_conf.enable_beacon = false;
- sdata->vif.bss_conf.ssid_len = 0;
- clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
- ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
- BSS_CHANGED_IBSS);
- ieee80211_vif_release_channel(sdata);
+
+ /* on the next join, re-program HT parameters */
+ memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa));
+ memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask));
+
synchronize_rcu();
- kfree(presp);
skb_queue_purge(&sdata->skb_queue);
projects / cascardo / linux.git / blobdiff