Commit | Line | Data |
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46900298 JB |
1 | /* |
2 | * IBSS mode implementation | |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 9 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
d321cd01 | 10 | * Copyright(c) 2016 Intel Deutschland GmbH |
46900298 JB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/delay.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
46900298 JB |
19 | #include <linux/if_ether.h> |
20 | #include <linux/skbuff.h> | |
21 | #include <linux/if_arp.h> | |
22 | #include <linux/etherdevice.h> | |
23 | #include <linux/rtnetlink.h> | |
24 | #include <net/mac80211.h> | |
46900298 JB |
25 | |
26 | #include "ieee80211_i.h" | |
24487981 | 27 | #include "driver-ops.h" |
46900298 JB |
28 | #include "rate.h" |
29 | ||
30 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
46900298 JB |
31 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
32 | ||
33 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
34 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
dad9defd | 35 | #define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ) |
46900298 JB |
36 | |
37 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
38 | ||
d51b70ff SW |
39 | static struct beacon_data * |
40 | ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, | |
41 | const int beacon_int, const u32 basic_rates, | |
42 | const u16 capability, u64 tsf, | |
43 | struct cfg80211_chan_def *chandef, | |
cd7760e6 SW |
44 | bool *have_higher_than_11mbit, |
45 | struct cfg80211_csa_settings *csa_settings) | |
46900298 JB |
46 | { |
47 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
48 | struct ieee80211_local *local = sdata->local; | |
2103dec1 | 49 | int rates_n = 0, i, ri; |
46900298 JB |
50 | struct ieee80211_mgmt *mgmt; |
51 | u8 *pos; | |
52 | struct ieee80211_supported_band *sband; | |
d51b70ff | 53 | u32 rate_flags, rates = 0, rates_added = 0; |
c3ffeab4 JB |
54 | struct beacon_data *presp; |
55 | int frame_len; | |
2103dec1 | 56 | int shift; |
24487981 | 57 | |
46900298 | 58 | /* Build IBSS probe response */ |
c3ffeab4 JB |
59 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
60 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
61 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
62 | 2 + 8 /* max Supported Rates */ + | |
63 | 3 /* max DS params */ + | |
64 | 4 /* IBSS params */ + | |
cd7760e6 | 65 | 5 /* Channel Switch Announcement */ + |
c3ffeab4 JB |
66 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
67 | 2 + sizeof(struct ieee80211_ht_cap) + | |
68 | 2 + sizeof(struct ieee80211_ht_operation) + | |
69 | ifibss->ie_len; | |
70 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); | |
71 | if (!presp) | |
d51b70ff | 72 | return NULL; |
c3ffeab4 JB |
73 | |
74 | presp->head = (void *)(presp + 1); | |
75 | ||
76 | mgmt = (void *) presp->head; | |
46900298 JB |
77 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
78 | IEEE80211_STYPE_PROBE_RESP); | |
e83e6541 | 79 | eth_broadcast_addr(mgmt->da); |
47846c9b | 80 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 81 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 82 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 83 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
84 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
85 | ||
c3ffeab4 JB |
86 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
87 | ||
46900298 JB |
88 | *pos++ = WLAN_EID_SSID; |
89 | *pos++ = ifibss->ssid_len; | |
90 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
c3ffeab4 | 91 | pos += ifibss->ssid_len; |
46900298 | 92 | |
d51b70ff SW |
93 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
94 | rate_flags = ieee80211_chandef_rate_flags(chandef); | |
95 | shift = ieee80211_chandef_get_shift(chandef); | |
96 | rates_n = 0; | |
97 | if (have_higher_than_11mbit) | |
98 | *have_higher_than_11mbit = false; | |
99 | ||
2103dec1 SW |
100 | for (i = 0; i < sband->n_bitrates; i++) { |
101 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
102 | continue; | |
d51b70ff SW |
103 | if (sband->bitrates[i].bitrate > 110 && |
104 | have_higher_than_11mbit) | |
105 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
106 | |
107 | rates |= BIT(i); | |
108 | rates_n++; | |
109 | } | |
110 | ||
46900298 | 111 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
112 | *pos++ = min_t(int, 8, rates_n); |
113 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
114 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
115 | 5 * (1 << shift)); | |
c3ffeab4 | 116 | u8 basic = 0; |
2103dec1 SW |
117 | if (!(rates & BIT(ri))) |
118 | continue; | |
119 | ||
120 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 121 | basic = 0x80; |
2103dec1 | 122 | *pos++ = basic | (u8) rate; |
93c75786 SW |
123 | if (++rates_added == 8) { |
124 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 125 | break; |
93c75786 | 126 | } |
c3ffeab4 | 127 | } |
46900298 | 128 | |
57fbcce3 | 129 | if (sband->band == NL80211_BAND_2GHZ) { |
46900298 JB |
130 | *pos++ = WLAN_EID_DS_PARAMS; |
131 | *pos++ = 1; | |
d51b70ff SW |
132 | *pos++ = ieee80211_frequency_to_channel( |
133 | chandef->chan->center_freq); | |
46900298 JB |
134 | } |
135 | ||
46900298 JB |
136 | *pos++ = WLAN_EID_IBSS_PARAMS; |
137 | *pos++ = 2; | |
138 | /* FIX: set ATIM window based on scan results */ | |
139 | *pos++ = 0; | |
140 | *pos++ = 0; | |
141 | ||
cd7760e6 SW |
142 | if (csa_settings) { |
143 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
144 | *pos++ = 3; | |
145 | *pos++ = csa_settings->block_tx ? 1 : 0; | |
146 | *pos++ = ieee80211_frequency_to_channel( | |
147 | csa_settings->chandef.chan->center_freq); | |
af296bdb | 148 | presp->csa_counter_offsets[0] = (pos - presp->head); |
cd7760e6 | 149 | *pos++ = csa_settings->count; |
8df734e8 | 150 | presp->csa_current_counter = csa_settings->count; |
cd7760e6 SW |
151 | } |
152 | ||
2103dec1 SW |
153 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
154 | if (rates_n > 8) { | |
46900298 | 155 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
156 | *pos++ = rates_n - 8; |
157 | for (; ri < sband->n_bitrates; ri++) { | |
158 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
159 | 5 * (1 << shift)); | |
c3ffeab4 | 160 | u8 basic = 0; |
2103dec1 SW |
161 | if (!(rates & BIT(ri))) |
162 | continue; | |
163 | ||
164 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 165 | basic = 0x80; |
2103dec1 | 166 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 167 | } |
46900298 JB |
168 | } |
169 | ||
c3ffeab4 JB |
170 | if (ifibss->ie_len) { |
171 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
172 | pos += ifibss->ie_len; | |
173 | } | |
af8cdcd8 | 174 | |
13c40c54 | 175 | /* add HT capability and information IEs */ |
d51b70ff SW |
176 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
177 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
178 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 179 | sband->ht_cap.ht_supported) { |
822854b0 SW |
180 | struct ieee80211_sta_ht_cap ht_cap; |
181 | ||
182 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
183 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
184 | ||
185 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
186 | /* |
187 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
188 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
189 | * keep them at 0 | |
190 | */ | |
074d46d1 | 191 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
57f255f5 | 192 | chandef, 0, false); |
abcff6ef JD |
193 | |
194 | /* add VHT capability and information IEs */ | |
195 | if (chandef->width != NL80211_CHAN_WIDTH_20 && | |
196 | chandef->width != NL80211_CHAN_WIDTH_40 && | |
197 | sband->vht_cap.vht_supported) { | |
198 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
199 | sband->vht_cap.cap); | |
200 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, | |
201 | chandef); | |
202 | } | |
13c40c54 AS |
203 | } |
204 | ||
40b861a0 AN |
205 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
206 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 207 | |
c3ffeab4 JB |
208 | presp->head_len = pos - presp->head; |
209 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
210 | goto error; |
211 | ||
212 | return presp; | |
213 | error: | |
214 | kfree(presp); | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
219 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 220 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
221 | const u32 basic_rates, |
222 | const u16 capability, u64 tsf, | |
223 | bool creator) | |
224 | { | |
225 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
226 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
227 | struct ieee80211_mgmt *mgmt; |
228 | struct cfg80211_bss *bss; | |
229 | u32 bss_change; | |
230 | struct cfg80211_chan_def chandef; | |
b35c8097 | 231 | struct ieee80211_channel *chan; |
d51b70ff | 232 | struct beacon_data *presp; |
61f6bba0 | 233 | struct cfg80211_inform_bss bss_meta = {}; |
d51b70ff | 234 | bool have_higher_than_11mbit; |
2beb6dab | 235 | bool radar_required; |
55fff501 | 236 | int err; |
d51b70ff SW |
237 | |
238 | sdata_assert_lock(sdata); | |
239 | ||
240 | /* Reset own TSF to allow time synchronization work. */ | |
241 | drv_reset_tsf(local, sdata); | |
242 | ||
243 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
244 | sta_info_flush(sdata); | |
245 | ||
246 | /* if merging, indicate to driver that we leave the old IBSS */ | |
247 | if (sdata->vif.bss_conf.ibss_joined) { | |
248 | sdata->vif.bss_conf.ibss_joined = false; | |
249 | sdata->vif.bss_conf.ibss_creator = false; | |
250 | sdata->vif.bss_conf.enable_beacon = false; | |
251 | netif_carrier_off(sdata->dev); | |
252 | ieee80211_bss_info_change_notify(sdata, | |
253 | BSS_CHANGED_IBSS | | |
254 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 255 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
256 | } |
257 | ||
258 | presp = rcu_dereference_protected(ifibss->presp, | |
259 | lockdep_is_held(&sdata->wdev.mtx)); | |
0c2bef46 | 260 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
261 | if (presp) |
262 | kfree_rcu(presp, rcu_head); | |
263 | ||
b35c8097 JL |
264 | /* make a copy of the chandef, it could be modified below. */ |
265 | chandef = *req_chandef; | |
266 | chan = chandef.chan; | |
174e0cd2 IP |
267 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
268 | NL80211_IFTYPE_ADHOC)) { | |
d51b70ff SW |
269 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
270 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
271 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
272 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
273 | sdata_info(sdata, | |
274 | "Failed to join IBSS, beacons forbidden\n"); | |
275 | return; | |
276 | } | |
277 | chandef.width = NL80211_CHAN_WIDTH_20; | |
278 | chandef.center_freq1 = chan->center_freq; | |
8e8d347d | 279 | /* check again for downgraded chandef */ |
174e0cd2 IP |
280 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
281 | NL80211_IFTYPE_ADHOC)) { | |
8e8d347d SW |
282 | sdata_info(sdata, |
283 | "Failed to join IBSS, beacons forbidden\n"); | |
284 | return; | |
285 | } | |
286 | } | |
287 | ||
288 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab | 289 | &chandef, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
290 | if (err < 0) { |
291 | sdata_info(sdata, | |
292 | "Failed to join IBSS, invalid chandef\n"); | |
293 | return; | |
294 | } | |
2beb6dab LC |
295 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
296 | sdata_info(sdata, | |
297 | "Failed to join IBSS, DFS channel without control program\n"); | |
298 | return; | |
d51b70ff SW |
299 | } |
300 | ||
2beb6dab LC |
301 | radar_required = err; |
302 | ||
34a3740d | 303 | mutex_lock(&local->mtx); |
d51b70ff SW |
304 | if (ieee80211_vif_use_channel(sdata, &chandef, |
305 | ifibss->fixed_channel ? | |
306 | IEEE80211_CHANCTX_SHARED : | |
307 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
308 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
34a3740d | 309 | mutex_unlock(&local->mtx); |
d51b70ff SW |
310 | return; |
311 | } | |
cc901de1 | 312 | sdata->radar_required = radar_required; |
34a3740d | 313 | mutex_unlock(&local->mtx); |
d51b70ff SW |
314 | |
315 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
316 | ||
d51b70ff SW |
317 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
318 | capability, tsf, &chandef, | |
cd7760e6 | 319 | &have_higher_than_11mbit, NULL); |
d51b70ff | 320 | if (!presp) |
c3ffeab4 JB |
321 | return; |
322 | ||
323 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 324 | mgmt = (void *)presp->head; |
46900298 | 325 | |
d6a83228 | 326 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 327 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 328 | sdata->vif.bss_conf.basic_rates = basic_rates; |
0ca54f6c MP |
329 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
330 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
331 | bss_change = BSS_CHANGED_BEACON_INT; |
332 | bss_change |= ieee80211_reset_erp_info(sdata); | |
333 | bss_change |= BSS_CHANGED_BSSID; | |
334 | bss_change |= BSS_CHANGED_BEACON; | |
335 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 336 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 337 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 338 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 339 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
340 | |
341 | /* | |
342 | * In 5 GHz/802.11a, we can always use short slot time. | |
343 | * (IEEE 802.11-2012 18.3.8.7) | |
344 | * | |
345 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
346 | * reasons. | |
347 | * (IEEE 802.11-2012 19.4.5) | |
348 | * | |
349 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
350 | */ | |
57fbcce3 | 351 | sdata->vif.bss_conf.use_short_slot = chan->band == NL80211_BAND_5GHZ; |
2f91a967 SW |
352 | bss_change |= BSS_CHANGED_ERP_SLOT; |
353 | ||
2ec9c1f6 | 354 | /* cf. IEEE 802.11 9.2.12 */ |
57fbcce3 | 355 | if (chan->band == NL80211_BAND_2GHZ && have_higher_than_11mbit) |
2ec9c1f6 SW |
356 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
357 | else | |
358 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
359 | ||
cec66283 | 360 | ieee80211_set_wmm_default(sdata, true, false); |
55fff501 | 361 | |
8fc214ba | 362 | sdata->vif.bss_conf.ibss_joined = true; |
c13a765b | 363 | sdata->vif.bss_conf.ibss_creator = creator; |
46900298 | 364 | |
55fff501 JB |
365 | err = drv_join_ibss(local, sdata); |
366 | if (err) { | |
367 | sdata->vif.bss_conf.ibss_joined = false; | |
368 | sdata->vif.bss_conf.ibss_creator = false; | |
369 | sdata->vif.bss_conf.enable_beacon = false; | |
370 | sdata->vif.bss_conf.ssid_len = 0; | |
371 | RCU_INIT_POINTER(ifibss->presp, NULL); | |
372 | kfree_rcu(presp, rcu_head); | |
34a3740d | 373 | mutex_lock(&local->mtx); |
55fff501 | 374 | ieee80211_vif_release_channel(sdata); |
34a3740d | 375 | mutex_unlock(&local->mtx); |
55fff501 JB |
376 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
377 | err); | |
378 | return; | |
379 | } | |
380 | ||
381 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 382 | |
46900298 | 383 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
384 | mod_timer(&ifibss->timer, |
385 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 386 | |
61f6bba0 JB |
387 | bss_meta.chan = chan; |
388 | bss_meta.scan_width = cfg80211_chandef_to_scan_width(&chandef); | |
389 | bss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, | |
390 | presp->head_len, GFP_KERNEL); | |
391 | ||
5b112d3d | 392 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 393 | netif_carrier_on(sdata->dev); |
fe94f3a4 | 394 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
46900298 JB |
395 | } |
396 | ||
af8cdcd8 JB |
397 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
398 | struct ieee80211_bss *bss) | |
46900298 | 399 | { |
0c1ad2ca JB |
400 | struct cfg80211_bss *cbss = |
401 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 402 | struct ieee80211_supported_band *sband; |
75a423f4 | 403 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
404 | u32 basic_rates; |
405 | int i, j; | |
0c1ad2ca | 406 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 407 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 408 | enum nl80211_channel_type chan_type; |
8cef2c9d | 409 | u64 tsf; |
2103dec1 SW |
410 | u32 rate_flags; |
411 | int shift; | |
57c4d7b4 | 412 | |
8d61ffa5 | 413 | sdata_assert_lock(sdata); |
7a17a33c | 414 | |
57c4d7b4 JB |
415 | if (beacon_int < 10) |
416 | beacon_int = 10; | |
417 | ||
75a423f4 SW |
418 | switch (sdata->u.ibss.chandef.width) { |
419 | case NL80211_CHAN_WIDTH_20_NOHT: | |
420 | case NL80211_CHAN_WIDTH_20: | |
421 | case NL80211_CHAN_WIDTH_40: | |
422 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
423 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
424 | break; | |
425 | case NL80211_CHAN_WIDTH_5: | |
426 | case NL80211_CHAN_WIDTH_10: | |
427 | cfg80211_chandef_create(&chandef, cbss->channel, | |
428 | NL80211_CHAN_WIDTH_20_NOHT); | |
429 | chandef.width = sdata->u.ibss.chandef.width; | |
430 | break; | |
abcff6ef | 431 | case NL80211_CHAN_WIDTH_80: |
c39b336d | 432 | case NL80211_CHAN_WIDTH_80P80: |
abcff6ef JD |
433 | case NL80211_CHAN_WIDTH_160: |
434 | chandef = sdata->u.ibss.chandef; | |
435 | chandef.chan = cbss->channel; | |
436 | break; | |
75a423f4 SW |
437 | default: |
438 | /* fall back to 20 MHz for unsupported modes */ | |
439 | cfg80211_chandef_create(&chandef, cbss->channel, | |
440 | NL80211_CHAN_WIDTH_20_NOHT); | |
441 | break; | |
442 | } | |
443 | ||
0c1ad2ca | 444 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
445 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
446 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
447 | |
448 | basic_rates = 0; | |
449 | ||
450 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 451 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
452 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
453 | ||
454 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
455 | int brate; |
456 | if ((rate_flags & sband->bitrates[j].flags) | |
457 | != rate_flags) | |
458 | continue; | |
459 | ||
460 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
461 | 5 * (1 << shift)); | |
462 | if (brate == rate) { | |
b59066a2 JB |
463 | if (is_basic) |
464 | basic_rates |= BIT(j); | |
465 | break; | |
466 | } | |
467 | } | |
468 | } | |
469 | ||
8cef2c9d JB |
470 | rcu_read_lock(); |
471 | ies = rcu_dereference(cbss->ies); | |
472 | tsf = ies->tsf; | |
473 | rcu_read_unlock(); | |
474 | ||
0c1ad2ca | 475 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 476 | beacon_int, |
75a423f4 | 477 | &chandef, |
b59066a2 | 478 | basic_rates, |
0c1ad2ca | 479 | cbss->capability, |
8cef2c9d | 480 | tsf, false); |
46900298 JB |
481 | } |
482 | ||
cd7760e6 SW |
483 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
484 | struct cfg80211_csa_settings *csa_settings) | |
485 | { | |
486 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
487 | struct beacon_data *presp, *old_presp; | |
488 | struct cfg80211_bss *cbss; | |
489 | const struct cfg80211_bss_ies *ies; | |
6eb18137 | 490 | u16 capability = 0; |
cd7760e6 SW |
491 | u64 tsf; |
492 | int ret = 0; | |
493 | ||
494 | sdata_assert_lock(sdata); | |
495 | ||
cd7760e6 | 496 | if (ifibss->privacy) |
6eb18137 | 497 | capability = WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
498 | |
499 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
500 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
501 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
502 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
503 | |
504 | if (WARN_ON(!cbss)) { | |
505 | ret = -EINVAL; | |
506 | goto out; | |
507 | } | |
508 | ||
509 | rcu_read_lock(); | |
510 | ies = rcu_dereference(cbss->ies); | |
511 | tsf = ies->tsf; | |
512 | rcu_read_unlock(); | |
513 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
514 | ||
515 | old_presp = rcu_dereference_protected(ifibss->presp, | |
516 | lockdep_is_held(&sdata->wdev.mtx)); | |
517 | ||
518 | presp = ieee80211_ibss_build_presp(sdata, | |
519 | sdata->vif.bss_conf.beacon_int, | |
520 | sdata->vif.bss_conf.basic_rates, | |
521 | capability, tsf, &ifibss->chandef, | |
522 | NULL, csa_settings); | |
523 | if (!presp) { | |
524 | ret = -ENOMEM; | |
525 | goto out; | |
526 | } | |
527 | ||
528 | rcu_assign_pointer(ifibss->presp, presp); | |
529 | if (old_presp) | |
530 | kfree_rcu(old_presp, rcu_head); | |
531 | ||
dddd586b | 532 | return BSS_CHANGED_BEACON; |
cd7760e6 SW |
533 | out: |
534 | return ret; | |
535 | } | |
536 | ||
537 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) | |
538 | { | |
539 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
540 | struct cfg80211_bss *cbss; | |
faf046e7 | 541 | int err, changed = 0; |
cd7760e6 | 542 | |
bafdc614 SW |
543 | sdata_assert_lock(sdata); |
544 | ||
cd7760e6 SW |
545 | /* update cfg80211 bss information with the new channel */ |
546 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
547 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
548 | ifibss->chandef.chan, | |
549 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
550 | ifibss->ssid_len, |
551 | IEEE80211_BSS_TYPE_IBSS, | |
552 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
553 | /* XXX: should not really modify cfg80211 data */ |
554 | if (cbss) { | |
33787fc4 | 555 | cbss->channel = sdata->csa_chandef.chan; |
cd7760e6 SW |
556 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
557 | } | |
558 | } | |
559 | ||
33787fc4 | 560 | ifibss->chandef = sdata->csa_chandef; |
cd7760e6 SW |
561 | |
562 | /* generate the beacon */ | |
563 | err = ieee80211_ibss_csa_beacon(sdata, NULL); | |
cd7760e6 SW |
564 | if (err < 0) |
565 | return err; | |
566 | ||
faf046e7 | 567 | changed |= err; |
dddd586b | 568 | |
faf046e7 | 569 | return changed; |
cd7760e6 SW |
570 | } |
571 | ||
572 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
573 | { | |
574 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
575 | ||
576 | cancel_work_sync(&ifibss->csa_connection_drop_work); | |
577 | } | |
578 | ||
52874a5e | 579 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
580 | __acquires(RCU) |
581 | { | |
582 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
583 | u8 addr[ETH_ALEN]; | |
584 | ||
585 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
586 | ||
bdcbd8e0 | 587 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 588 | |
83d5cc01 JB |
589 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
590 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
591 | /* authorize the station only if the network is not RSN protected. If |
592 | * not wait for the userspace to authorize it */ | |
593 | if (!sta->sdata->u.ibss.control_port) | |
594 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
595 | |
596 | rate_control_rate_init(sta); | |
597 | ||
598 | /* If it fails, maybe we raced another insertion? */ | |
599 | if (sta_info_insert_rcu(sta)) | |
600 | return sta_info_get(sdata, addr); | |
601 | return sta; | |
602 | } | |
603 | ||
604 | static struct sta_info * | |
52874a5e AQ |
605 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
606 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
607 | __acquires(RCU) |
608 | { | |
609 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
610 | struct ieee80211_local *local = sdata->local; | |
611 | struct sta_info *sta; | |
55de908a | 612 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 613 | struct ieee80211_supported_band *sband; |
74608aca | 614 | enum nl80211_bss_scan_width scan_width; |
55de908a | 615 | int band; |
8bf11d8d JB |
616 | |
617 | /* | |
618 | * XXX: Consider removing the least recently used entry and | |
619 | * allow new one to be added. | |
620 | */ | |
621 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 622 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 623 | sdata->name, addr); |
8bf11d8d JB |
624 | rcu_read_lock(); |
625 | return NULL; | |
626 | } | |
627 | ||
628 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
629 | rcu_read_lock(); | |
630 | return NULL; | |
631 | } | |
632 | ||
b203ca39 | 633 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
634 | rcu_read_lock(); |
635 | return NULL; | |
636 | } | |
637 | ||
55de908a JB |
638 | rcu_read_lock(); |
639 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
640 | if (WARN_ON_ONCE(!chanctx_conf)) | |
641 | return NULL; | |
4bf88530 | 642 | band = chanctx_conf->def.chan->band; |
74608aca | 643 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
644 | rcu_read_unlock(); |
645 | ||
8bf11d8d JB |
646 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
647 | if (!sta) { | |
648 | rcu_read_lock(); | |
649 | return NULL; | |
650 | } | |
651 | ||
8bf11d8d | 652 | /* make sure mandatory rates are always added */ |
b422c6cd | 653 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 654 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 655 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 656 | |
52874a5e | 657 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
658 | } |
659 | ||
871a4180 SW |
660 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
661 | { | |
662 | struct ieee80211_local *local = sdata->local; | |
663 | int active = 0; | |
664 | struct sta_info *sta; | |
665 | ||
666 | sdata_assert_lock(sdata); | |
667 | ||
668 | rcu_read_lock(); | |
669 | ||
670 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
b8da6b6a JB |
671 | unsigned long last_active = ieee80211_sta_last_active(sta); |
672 | ||
871a4180 | 673 | if (sta->sdata == sdata && |
b8da6b6a JB |
674 | time_is_after_jiffies(last_active + |
675 | IEEE80211_IBSS_MERGE_INTERVAL)) { | |
871a4180 SW |
676 | active++; |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | rcu_read_unlock(); | |
682 | ||
683 | return active; | |
684 | } | |
685 | ||
686 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
687 | { | |
688 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
689 | struct ieee80211_local *local = sdata->local; | |
690 | struct cfg80211_bss *cbss; | |
691 | struct beacon_data *presp; | |
692 | struct sta_info *sta; | |
871a4180 | 693 | |
d4c80d9d | 694 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
695 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
696 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
697 | ifibss->ssid_len, |
698 | IEEE80211_BSS_TYPE_IBSS, | |
699 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
700 | |
701 | if (cbss) { | |
702 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
703 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
704 | } | |
705 | } | |
706 | ||
707 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
708 | ||
709 | sta_info_flush(sdata); | |
710 | ||
711 | spin_lock_bh(&ifibss->incomplete_lock); | |
712 | while (!list_empty(&ifibss->incomplete_stations)) { | |
713 | sta = list_first_entry(&ifibss->incomplete_stations, | |
714 | struct sta_info, list); | |
715 | list_del(&sta->list); | |
716 | spin_unlock_bh(&ifibss->incomplete_lock); | |
717 | ||
718 | sta_info_free(local, sta); | |
719 | spin_lock_bh(&ifibss->incomplete_lock); | |
720 | } | |
721 | spin_unlock_bh(&ifibss->incomplete_lock); | |
722 | ||
723 | netif_carrier_off(sdata->dev); | |
724 | ||
725 | sdata->vif.bss_conf.ibss_joined = false; | |
726 | sdata->vif.bss_conf.ibss_creator = false; | |
727 | sdata->vif.bss_conf.enable_beacon = false; | |
728 | sdata->vif.bss_conf.ssid_len = 0; | |
729 | ||
730 | /* remove beacon */ | |
731 | presp = rcu_dereference_protected(ifibss->presp, | |
732 | lockdep_is_held(&sdata->wdev.mtx)); | |
733 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); | |
734 | if (presp) | |
735 | kfree_rcu(presp, rcu_head); | |
736 | ||
737 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
738 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
739 | BSS_CHANGED_IBSS); | |
55fff501 | 740 | drv_leave_ibss(local, sdata); |
34a3740d | 741 | mutex_lock(&local->mtx); |
871a4180 | 742 | ieee80211_vif_release_channel(sdata); |
34a3740d | 743 | mutex_unlock(&local->mtx); |
871a4180 SW |
744 | } |
745 | ||
cd7760e6 SW |
746 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
747 | { | |
748 | struct ieee80211_sub_if_data *sdata = | |
749 | container_of(work, struct ieee80211_sub_if_data, | |
750 | u.ibss.csa_connection_drop_work); | |
751 | ||
6f07d216 LC |
752 | sdata_lock(sdata); |
753 | ||
cd7760e6 SW |
754 | ieee80211_ibss_disconnect(sdata); |
755 | synchronize_rcu(); | |
756 | skb_queue_purge(&sdata->skb_queue); | |
757 | ||
758 | /* trigger a scan to find another IBSS network to join */ | |
759 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
6f07d216 LC |
760 | |
761 | sdata_unlock(sdata); | |
cd7760e6 SW |
762 | } |
763 | ||
8e8d347d SW |
764 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
765 | { | |
766 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
767 | int err; | |
768 | ||
769 | /* if the current channel is a DFS channel, mark the channel as | |
770 | * unavailable. | |
771 | */ | |
772 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
773 | &ifibss->chandef, |
774 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
775 | if (err > 0) |
776 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
777 | GFP_ATOMIC); | |
778 | } | |
779 | ||
cd7760e6 SW |
780 | static bool |
781 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
782 | struct ieee802_11_elems *elems, | |
783 | bool beacon) | |
784 | { | |
785 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 786 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 787 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 788 | enum nl80211_channel_type ch_type; |
82a8e17d | 789 | int err; |
cd7760e6 | 790 | u32 sta_flags; |
cd7760e6 | 791 | |
dbd72850 MK |
792 | sdata_assert_lock(sdata); |
793 | ||
cd7760e6 SW |
794 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
795 | switch (ifibss->chandef.width) { | |
796 | case NL80211_CHAN_WIDTH_5: | |
797 | case NL80211_CHAN_WIDTH_10: | |
798 | case NL80211_CHAN_WIDTH_20_NOHT: | |
799 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
800 | /* fall through */ | |
801 | case NL80211_CHAN_WIDTH_20: | |
802 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
803 | break; | |
804 | default: | |
805 | break; | |
806 | } | |
807 | ||
808 | memset(¶ms, 0, sizeof(params)); | |
c0f17eb9 | 809 | memset(&csa_ie, 0, sizeof(csa_ie)); |
84469a45 | 810 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 811 | ifibss->chandef.chan->band, |
c0f17eb9 | 812 | sta_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
813 | /* can't switch to destination channel, fail */ |
814 | if (err < 0) | |
815 | goto disconnect; | |
816 | ||
817 | /* did not contain a CSA */ | |
818 | if (err) | |
819 | return false; | |
820 | ||
0834ae3c SW |
821 | /* channel switch is not supported, disconnect */ |
822 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
823 | goto disconnect; | |
824 | ||
c0f17eb9 CYY |
825 | params.count = csa_ie.count; |
826 | params.chandef = csa_ie.chandef; | |
827 | ||
cd7760e6 SW |
828 | switch (ifibss->chandef.width) { |
829 | case NL80211_CHAN_WIDTH_20_NOHT: | |
830 | case NL80211_CHAN_WIDTH_20: | |
831 | case NL80211_CHAN_WIDTH_40: | |
832 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
833 | * another mode has been announced. The mode is not adopted | |
834 | * within the beacon while doing CSA and we should therefore | |
835 | * keep the mode which we announce. | |
836 | */ | |
837 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
838 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
839 | ch_type); | |
840 | break; | |
841 | case NL80211_CHAN_WIDTH_5: | |
842 | case NL80211_CHAN_WIDTH_10: | |
843 | if (params.chandef.width != ifibss->chandef.width) { | |
844 | sdata_info(sdata, | |
845 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
846 | ifibss->bssid, | |
847 | params.chandef.chan->center_freq, | |
848 | params.chandef.width, | |
849 | params.chandef.center_freq1, | |
850 | params.chandef.center_freq2); | |
851 | goto disconnect; | |
852 | } | |
853 | break; | |
854 | default: | |
855 | /* should not happen, sta_flags should prevent VHT modes. */ | |
856 | WARN_ON(1); | |
857 | goto disconnect; | |
858 | } | |
859 | ||
174e0cd2 IP |
860 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
861 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
862 | sdata_info(sdata, |
863 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
864 | ifibss->bssid, | |
865 | params.chandef.chan->center_freq, | |
866 | params.chandef.width, | |
867 | params.chandef.center_freq1, | |
868 | params.chandef.center_freq2); | |
869 | goto disconnect; | |
870 | } | |
871 | ||
872 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
873 | ¶ms.chandef, |
874 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
875 | if (err < 0) |
876 | goto disconnect; | |
2beb6dab | 877 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 878 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 879 | goto disconnect; |
cd7760e6 SW |
880 | } |
881 | ||
2beb6dab LC |
882 | params.radar_required = err; |
883 | ||
82a8e17d LC |
884 | if (cfg80211_chandef_identical(¶ms.chandef, |
885 | &sdata->vif.bss_conf.chandef)) { | |
886 | ibss_dbg(sdata, | |
887 | "received csa with an identical chandef, ignoring\n"); | |
888 | return true; | |
cd7760e6 | 889 | } |
cd7760e6 SW |
890 | |
891 | /* all checks done, now perform the channel switch. */ | |
892 | ibss_dbg(sdata, | |
893 | "received channel switch announcement to go to channel %d MHz\n", | |
894 | params.chandef.chan->center_freq); | |
895 | ||
c0f17eb9 | 896 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 897 | |
82a8e17d LC |
898 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
899 | ¶ms)) | |
900 | goto disconnect; | |
cd7760e6 | 901 | |
8e8d347d SW |
902 | ieee80211_ibss_csa_mark_radar(sdata); |
903 | ||
cd7760e6 SW |
904 | return true; |
905 | disconnect: | |
906 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
907 | ieee80211_queue_work(&sdata->local->hw, | |
908 | &ifibss->csa_connection_drop_work); | |
909 | ||
8e8d347d SW |
910 | ieee80211_ibss_csa_mark_radar(sdata); |
911 | ||
cd7760e6 SW |
912 | return true; |
913 | } | |
914 | ||
915 | static void | |
916 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
917 | struct ieee80211_mgmt *mgmt, size_t len, | |
918 | struct ieee80211_rx_status *rx_status, | |
919 | struct ieee802_11_elems *elems) | |
920 | { | |
921 | int required_len; | |
922 | ||
923 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
924 | return; | |
925 | ||
926 | /* CSA is the only action we handle for now */ | |
927 | if (mgmt->u.action.u.measurement.action_code != | |
928 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
929 | return; | |
930 | ||
931 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
932 | sizeof(mgmt->u.action.u.chan_switch); | |
933 | if (len < required_len) | |
934 | return; | |
935 | ||
82a8e17d LC |
936 | if (!sdata->vif.csa_active) |
937 | ieee80211_ibss_process_chanswitch(sdata, elems, false); | |
cd7760e6 SW |
938 | } |
939 | ||
2cc59e78 AQ |
940 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
941 | struct ieee80211_mgmt *mgmt, | |
942 | size_t len) | |
943 | { | |
944 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
945 | ||
946 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
947 | return; | |
948 | ||
949 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", | |
950 | mgmt->sa, mgmt->da, mgmt->bssid, reason); | |
951 | sta_info_destroy_addr(sdata, mgmt->sa); | |
952 | } | |
953 | ||
6d810f10 AQ |
954 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
955 | struct ieee80211_mgmt *mgmt, | |
956 | size_t len) | |
957 | { | |
958 | u16 auth_alg, auth_transaction; | |
959 | ||
8d61ffa5 | 960 | sdata_assert_lock(sdata); |
6d810f10 AQ |
961 | |
962 | if (len < 24 + 6) | |
963 | return; | |
964 | ||
965 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
966 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
967 | ||
bdcbd8e0 JB |
968 | ibss_dbg(sdata, |
969 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", | |
970 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
971 | |
972 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
973 | return; | |
974 | ||
6d810f10 AQ |
975 | /* |
976 | * IEEE 802.11 standard does not require authentication in IBSS | |
977 | * networks and most implementations do not seem to use it. | |
978 | * However, try to reply to authentication attempts if someone | |
979 | * has actually implemented this. | |
980 | */ | |
700e8ea6 | 981 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 982 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
983 | } |
984 | ||
8a4988d1 JD |
985 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
986 | struct ieee80211_mgmt *mgmt, size_t len, | |
987 | struct ieee80211_rx_status *rx_status, | |
988 | struct ieee802_11_elems *elems, | |
989 | struct ieee80211_channel *channel) | |
46900298 | 990 | { |
46900298 | 991 | struct sta_info *sta; |
57fbcce3 | 992 | enum nl80211_band band = rx_status->band; |
74608aca | 993 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 994 | struct ieee80211_local *local = sdata->local; |
13c40c54 AS |
995 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
996 | bool rates_updated = false; | |
8a4988d1 | 997 | u32 supp_rates = 0; |
46900298 | 998 | |
8a4988d1 | 999 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
1000 | return; |
1001 | ||
8a4988d1 JD |
1002 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
1003 | return; | |
46900298 | 1004 | |
8a4988d1 JD |
1005 | rcu_read_lock(); |
1006 | sta = sta_info_get(sdata, mgmt->sa); | |
1007 | ||
1008 | if (elems->supp_rates) { | |
1009 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
1010 | band, NULL); | |
1011 | if (sta) { | |
1012 | u32 prev_rates; | |
1013 | ||
1014 | prev_rates = sta->sta.supp_rates[band]; | |
1015 | /* make sure mandatory rates are always added */ | |
1016 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
1017 | if (rx_status->flag & RX_FLAG_5MHZ) | |
1018 | scan_width = NL80211_BSS_CHAN_WIDTH_5; | |
1019 | if (rx_status->flag & RX_FLAG_10MHZ) | |
1020 | scan_width = NL80211_BSS_CHAN_WIDTH_10; | |
1021 | ||
1022 | sta->sta.supp_rates[band] = supp_rates | | |
1023 | ieee80211_mandatory_rates(sband, scan_width); | |
1024 | if (sta->sta.supp_rates[band] != prev_rates) { | |
1025 | ibss_dbg(sdata, | |
1026 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1027 | sta->sta.addr, prev_rates, | |
1028 | sta->sta.supp_rates[band]); | |
1029 | rates_updated = true; | |
8bf11d8d | 1030 | } |
8a4988d1 JD |
1031 | } else { |
1032 | rcu_read_unlock(); | |
1033 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1034 | mgmt->sa, supp_rates); | |
34e89507 | 1035 | } |
8a4988d1 | 1036 | } |
9eba6125 | 1037 | |
96a4688e JB |
1038 | if (sta && !sta->sta.wme && |
1039 | elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1040 | sta->sta.wme = true; |
96a4688e JB |
1041 | ieee80211_check_fast_xmit(sta); |
1042 | } | |
13c40c54 | 1043 | |
8a4988d1 JD |
1044 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1045 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1046 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1047 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1048 | /* we both use HT */ | |
1049 | struct ieee80211_ht_cap htcap_ie; | |
1050 | struct cfg80211_chan_def chandef; | |
abcff6ef | 1051 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth; |
d2954457 | 1052 | |
8ac3c704 JB |
1053 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
1054 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); | |
d2954457 | 1055 | |
8a4988d1 | 1056 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1057 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1058 | &htcap_ie, | |
1059 | sta); | |
abcff6ef JD |
1060 | |
1061 | if (elems->vht_operation && elems->vht_cap_elem && | |
1062 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1063 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1064 | /* we both use VHT */ | |
1065 | struct ieee80211_vht_cap cap_ie; | |
1066 | struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap; | |
1067 | ||
8ac3c704 JB |
1068 | ieee80211_chandef_vht_oper(elems->vht_operation, |
1069 | &chandef); | |
abcff6ef JD |
1070 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
1071 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
1072 | &cap_ie, sta); | |
1073 | if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap))) | |
1074 | rates_updated |= true; | |
13c40c54 AS |
1075 | } |
1076 | ||
abcff6ef JD |
1077 | if (bw != sta->sta.bandwidth) |
1078 | rates_updated |= true; | |
d2954457 | 1079 | |
abcff6ef JD |
1080 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1081 | &chandef)) | |
1082 | WARN_ON_ONCE(1); | |
8a4988d1 | 1083 | } |
d2954457 | 1084 | |
8a4988d1 JD |
1085 | if (sta && rates_updated) { |
1086 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
1087 | u8 rx_nss = sta->sta.rx_nss; | |
13c40c54 | 1088 | |
8a4988d1 JD |
1089 | /* Force rx_nss recalculation */ |
1090 | sta->sta.rx_nss = 0; | |
1091 | rate_control_rate_init(sta); | |
1092 | if (sta->sta.rx_nss != rx_nss) | |
1093 | changed |= IEEE80211_RC_NSS_CHANGED; | |
13c40c54 | 1094 | |
8a4988d1 | 1095 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1096 | } |
1097 | ||
8a4988d1 JD |
1098 | rcu_read_unlock(); |
1099 | } | |
1100 | ||
1101 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1102 | struct ieee80211_mgmt *mgmt, size_t len, | |
1103 | struct ieee80211_rx_status *rx_status, | |
1104 | struct ieee802_11_elems *elems) | |
1105 | { | |
1106 | struct ieee80211_local *local = sdata->local; | |
1107 | struct cfg80211_bss *cbss; | |
1108 | struct ieee80211_bss *bss; | |
1109 | struct ieee80211_channel *channel; | |
1110 | u64 beacon_timestamp, rx_timestamp; | |
1111 | u32 supp_rates = 0; | |
57fbcce3 | 1112 | enum nl80211_band band = rx_status->band; |
8a4988d1 JD |
1113 | |
1114 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1115 | if (!channel) | |
1116 | return; | |
1117 | ||
1118 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1119 | ||
46900298 | 1120 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 1121 | channel); |
46900298 JB |
1122 | if (!bss) |
1123 | return; | |
1124 | ||
0c1ad2ca JB |
1125 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1126 | ||
8cef2c9d JB |
1127 | /* same for beacon and probe response */ |
1128 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1129 | |
1130 | /* check if we need to merge IBSS */ | |
1131 | ||
46900298 | 1132 | /* not an IBSS */ |
0c1ad2ca | 1133 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1134 | goto put_bss; |
1135 | ||
1136 | /* different channel */ | |
55de908a | 1137 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1138 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1139 | goto put_bss; |
1140 | ||
1141 | /* different SSID */ | |
1142 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1143 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1144 | sdata->u.ibss.ssid_len)) | |
1145 | goto put_bss; | |
1146 | ||
cd7760e6 | 1147 | /* process channel switch */ |
82a8e17d LC |
1148 | if (sdata->vif.csa_active || |
1149 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) | |
cd7760e6 SW |
1150 | goto put_bss; |
1151 | ||
34e8f082 | 1152 | /* same BSSID */ |
b203ca39 | 1153 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1154 | goto put_bss; |
1155 | ||
cd7760e6 SW |
1156 | /* we use a fixed BSSID */ |
1157 | if (sdata->u.ibss.fixed_bssid) | |
1158 | goto put_bss; | |
1159 | ||
f4bda337 TP |
1160 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1161 | /* time when timestamp field was received */ | |
1162 | rx_timestamp = | |
1163 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1164 | len + FCS_LEN, 24); | |
24487981 JB |
1165 | } else { |
1166 | /* | |
1167 | * second best option: get current TSF | |
1168 | * (will return -1 if not supported) | |
1169 | */ | |
37a41b4a | 1170 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1171 | } |
46900298 | 1172 | |
bdcbd8e0 JB |
1173 | ibss_dbg(sdata, |
1174 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1175 | mgmt->sa, mgmt->bssid, | |
1176 | (unsigned long long)rx_timestamp, | |
1177 | (unsigned long long)beacon_timestamp, | |
1178 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1179 | jiffies); | |
46900298 JB |
1180 | |
1181 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1182 | ibss_dbg(sdata, |
1183 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1184 | mgmt->bssid); | |
46900298 | 1185 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1186 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1187 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1188 | supp_rates); |
8bf11d8d | 1189 | rcu_read_unlock(); |
46900298 JB |
1190 | } |
1191 | ||
1192 | put_bss: | |
1193 | ieee80211_rx_bss_put(local, bss); | |
1194 | } | |
1195 | ||
8bf11d8d JB |
1196 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1197 | const u8 *bssid, const u8 *addr, | |
1198 | u32 supp_rates) | |
46900298 | 1199 | { |
2e10d330 | 1200 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1201 | struct ieee80211_local *local = sdata->local; |
1202 | struct sta_info *sta; | |
55de908a | 1203 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1204 | struct ieee80211_supported_band *sband; |
74608aca | 1205 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1206 | int band; |
46900298 | 1207 | |
af8cdcd8 JB |
1208 | /* |
1209 | * XXX: Consider removing the least recently used entry and | |
1210 | * allow new one to be added. | |
1211 | */ | |
46900298 | 1212 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1213 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1214 | sdata->name, addr); |
8bf11d8d | 1215 | return; |
46900298 JB |
1216 | } |
1217 | ||
2e10d330 | 1218 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1219 | return; |
2e10d330 | 1220 | |
b203ca39 | 1221 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1222 | return; |
46900298 | 1223 | |
55de908a JB |
1224 | rcu_read_lock(); |
1225 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1226 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
1227 | rcu_read_unlock(); | |
1228 | return; | |
1229 | } | |
4bf88530 | 1230 | band = chanctx_conf->def.chan->band; |
74608aca | 1231 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1232 | rcu_read_unlock(); |
1233 | ||
8bf11d8d | 1234 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1235 | if (!sta) |
8bf11d8d | 1236 | return; |
46900298 | 1237 | |
46900298 | 1238 | /* make sure mandatory rates are always added */ |
b422c6cd | 1239 | sband = local->hw.wiphy->bands[band]; |
46900298 | 1240 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 1241 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1242 | |
8bf11d8d JB |
1243 | spin_lock(&ifibss->incomplete_lock); |
1244 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1245 | spin_unlock(&ifibss->incomplete_lock); | |
1246 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
1247 | } |
1248 | ||
dad9defd AQ |
1249 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1250 | { | |
1251 | struct ieee80211_local *local = sdata->local; | |
1252 | struct sta_info *sta, *tmp; | |
1253 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
e5a9f8d0 | 1254 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
dad9defd AQ |
1255 | |
1256 | mutex_lock(&local->sta_mtx); | |
1257 | ||
1258 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
b8da6b6a JB |
1259 | unsigned long last_active = ieee80211_sta_last_active(sta); |
1260 | ||
dad9defd AQ |
1261 | if (sdata != sta->sdata) |
1262 | continue; | |
1263 | ||
b8da6b6a JB |
1264 | if (time_is_before_jiffies(last_active + exp_time) || |
1265 | (time_is_before_jiffies(last_active + exp_rsn) && | |
dad9defd AQ |
1266 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
1267 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
1268 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1269 | "not authorized " : "", sta->sta.addr); | |
1270 | ||
1271 | WARN_ON(__sta_info_destroy(sta)); | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | mutex_unlock(&local->sta_mtx); | |
1276 | } | |
1277 | ||
ce9058ae BP |
1278 | /* |
1279 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1280 | */ | |
46900298 JB |
1281 | |
1282 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1283 | { | |
1284 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1285 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1286 | |
8d61ffa5 | 1287 | sdata_assert_lock(sdata); |
7a17a33c | 1288 | |
af8cdcd8 JB |
1289 | mod_timer(&ifibss->timer, |
1290 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1291 | |
dad9defd | 1292 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1293 | |
450aae3d S |
1294 | if (time_before(jiffies, ifibss->last_scan_completed + |
1295 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1296 | return; | |
1297 | ||
46900298 JB |
1298 | if (ieee80211_sta_active_ibss(sdata)) |
1299 | return; | |
1300 | ||
c037b836 | 1301 | if (ifibss->fixed_channel) |
46900298 JB |
1302 | return; |
1303 | ||
bdcbd8e0 JB |
1304 | sdata_info(sdata, |
1305 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1306 | |
7ca15a0a | 1307 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1308 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1309 | NULL, 0, scan_width); |
46900298 JB |
1310 | } |
1311 | ||
af8cdcd8 | 1312 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1313 | { |
1314 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1315 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1316 | u16 capability; |
1317 | int i; | |
1318 | ||
8d61ffa5 | 1319 | sdata_assert_lock(sdata); |
7a17a33c | 1320 | |
af8cdcd8 | 1321 | if (ifibss->fixed_bssid) { |
46900298 JB |
1322 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1323 | } else { | |
1324 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1325 | * own MAC address to make sure that devices that do not have proper | |
1326 | * random number generator get different BSSID. */ | |
1327 | get_random_bytes(bssid, ETH_ALEN); | |
1328 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1329 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1330 | bssid[0] &= ~0x01; |
1331 | bssid[0] |= 0x02; | |
1332 | } | |
1333 | ||
bdcbd8e0 | 1334 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1335 | |
46900298 JB |
1336 | capability = WLAN_CAPABILITY_IBSS; |
1337 | ||
fffd0934 | 1338 | if (ifibss->privacy) |
46900298 | 1339 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1340 | |
57c4d7b4 | 1341 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1342 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1343 | capability, 0, true); |
46900298 JB |
1344 | } |
1345 | ||
76bed0f4 JD |
1346 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
1347 | struct ieee80211_channel **channels, | |
1348 | unsigned int channels_max, | |
1349 | u32 center_freq, u32 width) | |
1350 | { | |
1351 | struct ieee80211_channel *chan = NULL; | |
1352 | unsigned int n_chan = 0; | |
1353 | u32 start_freq, end_freq, freq; | |
1354 | ||
1355 | if (width <= 20) { | |
1356 | start_freq = center_freq; | |
1357 | end_freq = center_freq; | |
1358 | } else { | |
1359 | start_freq = center_freq - width / 2 + 10; | |
1360 | end_freq = center_freq + width / 2 - 10; | |
1361 | } | |
1362 | ||
1363 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1364 | chan = ieee80211_get_channel(wiphy, freq); | |
1365 | if (!chan) | |
1366 | continue; | |
1367 | if (n_chan >= channels_max) | |
1368 | return n_chan; | |
1369 | ||
1370 | channels[n_chan] = chan; | |
1371 | n_chan++; | |
1372 | } | |
1373 | ||
1374 | return n_chan; | |
1375 | } | |
1376 | ||
1377 | static unsigned int | |
1378 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1379 | const struct cfg80211_chan_def *chandef, | |
1380 | struct ieee80211_channel **channels, | |
1381 | unsigned int channels_max) | |
1382 | { | |
1383 | unsigned int n_chan = 0; | |
1384 | u32 width, cf1, cf2 = 0; | |
1385 | ||
1386 | switch (chandef->width) { | |
1387 | case NL80211_CHAN_WIDTH_40: | |
1388 | width = 40; | |
1389 | break; | |
1390 | case NL80211_CHAN_WIDTH_80P80: | |
1391 | cf2 = chandef->center_freq2; | |
1392 | /* fall through */ | |
1393 | case NL80211_CHAN_WIDTH_80: | |
1394 | width = 80; | |
1395 | break; | |
1396 | case NL80211_CHAN_WIDTH_160: | |
1397 | width = 160; | |
1398 | break; | |
1399 | default: | |
1400 | width = 20; | |
1401 | break; | |
1402 | } | |
1403 | ||
1404 | cf1 = chandef->center_freq1; | |
1405 | ||
1406 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1407 | ||
1408 | if (cf2) | |
1409 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1410 | channels_max - n_chan, cf2, | |
1411 | width); | |
1412 | ||
1413 | return n_chan; | |
1414 | } | |
1415 | ||
ce9058ae BP |
1416 | /* |
1417 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1418 | */ | |
1419 | ||
af8cdcd8 | 1420 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1421 | { |
1422 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1423 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1424 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1425 | struct ieee80211_channel *chan = NULL; |
46900298 | 1426 | const u8 *bssid = NULL; |
7ca15a0a | 1427 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1428 | int active_ibss; |
1429 | ||
8d61ffa5 | 1430 | sdata_assert_lock(sdata); |
7a17a33c | 1431 | |
46900298 | 1432 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1433 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1434 | |
1435 | if (active_ibss) | |
af8cdcd8 | 1436 | return; |
46900298 | 1437 | |
af8cdcd8 JB |
1438 | if (ifibss->fixed_bssid) |
1439 | bssid = ifibss->bssid; | |
1440 | if (ifibss->fixed_channel) | |
3aede78a | 1441 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1442 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1443 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1444 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1445 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1446 | IEEE80211_BSS_TYPE_IBSS, |
1447 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1448 | |
1449 | if (cbss) { | |
1450 | struct ieee80211_bss *bss; | |
46900298 | 1451 | |
0c1ad2ca | 1452 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1453 | ibss_dbg(sdata, |
1454 | "sta_find_ibss: selected %pM current %pM\n", | |
1455 | cbss->bssid, ifibss->bssid); | |
1456 | sdata_info(sdata, | |
1457 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1458 | cbss->bssid); | |
46900298 | 1459 | |
af8cdcd8 | 1460 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1461 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1462 | return; |
d419b9f0 | 1463 | } |
46900298 | 1464 | |
d8eb741e AQ |
1465 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1466 | * directly and do not waste time scanning | |
1467 | */ | |
1468 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1469 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1470 | bssid); | |
1471 | ieee80211_sta_create_ibss(sdata); | |
1472 | return; | |
1473 | } | |
1474 | ||
1475 | ||
bdcbd8e0 | 1476 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1477 | |
1478 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1479 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1480 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1481 | struct ieee80211_channel *channels[8]; |
1482 | unsigned int num; | |
1483 | ||
bdcbd8e0 | 1484 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1485 | |
7ca15a0a | 1486 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
d321cd01 SS |
1487 | |
1488 | if (ifibss->fixed_channel) { | |
1489 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, | |
1490 | &ifibss->chandef, | |
1491 | channels, | |
1492 | ARRAY_SIZE(channels)); | |
1493 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1494 | ifibss->ssid_len, channels, | |
1495 | num, scan_width); | |
1496 | } else { | |
1497 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1498 | ifibss->ssid_len, NULL, | |
1499 | 0, scan_width); | |
1500 | } | |
ce9058ae | 1501 | } else { |
46900298 JB |
1502 | int interval = IEEE80211_SCAN_INTERVAL; |
1503 | ||
1504 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1505 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1506 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1507 | |
af8cdcd8 JB |
1508 | mod_timer(&ifibss->timer, |
1509 | round_jiffies(jiffies + interval)); | |
46900298 | 1510 | } |
46900298 JB |
1511 | } |
1512 | ||
1513 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1514 | struct sk_buff *req) |
46900298 | 1515 | { |
c269a203 | 1516 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1517 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1518 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1519 | int tx_last_beacon, len = req->len; |
46900298 | 1520 | struct sk_buff *skb; |
c3ffeab4 | 1521 | struct beacon_data *presp; |
46900298 JB |
1522 | u8 *pos, *end; |
1523 | ||
8d61ffa5 | 1524 | sdata_assert_lock(sdata); |
7a17a33c | 1525 | |
40b275b6 | 1526 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1527 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1528 | |
46900298 | 1529 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1530 | len < 24 + 2 || !presp) |
46900298 JB |
1531 | return; |
1532 | ||
24487981 | 1533 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1534 | |
bdcbd8e0 JB |
1535 | ibss_dbg(sdata, |
1536 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", | |
1537 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); | |
46900298 | 1538 | |
1ed76487 | 1539 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1540 | return; |
1541 | ||
b203ca39 | 1542 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1543 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1544 | return; |
1545 | ||
1546 | end = ((u8 *) mgmt) + len; | |
1547 | pos = mgmt->u.probe_req.variable; | |
1548 | if (pos[0] != WLAN_EID_SSID || | |
1549 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1550 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1551 | mgmt->sa); | |
46900298 JB |
1552 | return; |
1553 | } | |
1554 | if (pos[1] != 0 && | |
1555 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1556 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1557 | /* Ignore ProbeReq for foreign SSID */ |
1558 | return; | |
1559 | } | |
1560 | ||
1561 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1562 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1563 | if (!skb) |
1564 | return; | |
1565 | ||
c3ffeab4 JB |
1566 | skb_reserve(skb, local->tx_headroom); |
1567 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); | |
1568 | ||
1569 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1570 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1571 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1572 | |
1573 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1574 | if (pos[1] == 0) | |
1575 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1576 | ||
62ae67be | 1577 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1578 | } |
1579 | ||
d45c4172 EG |
1580 | static |
1581 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1582 | struct ieee80211_mgmt *mgmt, size_t len, | |
1583 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1584 | { |
1585 | size_t baselen; | |
1586 | struct ieee802_11_elems elems; | |
1587 | ||
d45c4172 EG |
1588 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1589 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1590 | ||
1591 | /* | |
1592 | * either beacon or probe_resp but the variable field is at the | |
1593 | * same offset | |
1594 | */ | |
46900298 JB |
1595 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1596 | if (baselen > len) | |
1597 | return; | |
1598 | ||
1599 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1600 | false, &elems); |
46900298 | 1601 | |
d45c4172 | 1602 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1603 | } |
1604 | ||
1fa57d01 JB |
1605 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1606 | struct sk_buff *skb) | |
46900298 JB |
1607 | { |
1608 | struct ieee80211_rx_status *rx_status; | |
1609 | struct ieee80211_mgmt *mgmt; | |
1610 | u16 fc; | |
cd7760e6 SW |
1611 | struct ieee802_11_elems elems; |
1612 | int ies_len; | |
46900298 | 1613 | |
f1d58c25 | 1614 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1615 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1616 | fc = le16_to_cpu(mgmt->frame_control); | |
1617 | ||
8d61ffa5 | 1618 | sdata_lock(sdata); |
7a17a33c | 1619 | |
c926d006 TH |
1620 | if (!sdata->u.ibss.ssid_len) |
1621 | goto mgmt_out; /* not ready to merge yet */ | |
1622 | ||
46900298 JB |
1623 | switch (fc & IEEE80211_FCTL_STYPE) { |
1624 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1625 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1626 | break; |
1627 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1628 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1629 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1630 | rx_status); | |
46900298 JB |
1631 | break; |
1632 | case IEEE80211_STYPE_AUTH: | |
1633 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1634 | break; | |
2cc59e78 AQ |
1635 | case IEEE80211_STYPE_DEAUTH: |
1636 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1637 | break; | |
cd7760e6 SW |
1638 | case IEEE80211_STYPE_ACTION: |
1639 | switch (mgmt->u.action.category) { | |
1640 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1641 | ies_len = skb->len - | |
1642 | offsetof(struct ieee80211_mgmt, | |
1643 | u.action.u.chan_switch.variable); | |
1644 | ||
1645 | if (ies_len < 0) | |
1646 | break; | |
1647 | ||
1648 | ieee802_11_parse_elems( | |
1649 | mgmt->u.action.u.chan_switch.variable, | |
1650 | ies_len, true, &elems); | |
1651 | ||
1652 | if (elems.parse_error) | |
1653 | break; | |
1654 | ||
1655 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, | |
1656 | rx_status, &elems); | |
1657 | break; | |
1658 | } | |
46900298 | 1659 | } |
7a17a33c | 1660 | |
c926d006 | 1661 | mgmt_out: |
8d61ffa5 | 1662 | sdata_unlock(sdata); |
46900298 JB |
1663 | } |
1664 | ||
1fa57d01 | 1665 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1666 | { |
1fa57d01 | 1667 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1668 | struct sta_info *sta; |
46900298 | 1669 | |
8d61ffa5 | 1670 | sdata_lock(sdata); |
7a17a33c JB |
1671 | |
1672 | /* | |
1673 | * Work could be scheduled after scan or similar | |
1674 | * when we aren't even joined (or trying) with a | |
1675 | * network. | |
1676 | */ | |
1677 | if (!ifibss->ssid_len) | |
1678 | goto out; | |
46900298 | 1679 | |
8bf11d8d JB |
1680 | spin_lock_bh(&ifibss->incomplete_lock); |
1681 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1682 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1683 | struct sta_info, list); | |
1684 | list_del(&sta->list); | |
1685 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1686 | ||
52874a5e | 1687 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1688 | rcu_read_unlock(); |
1689 | spin_lock_bh(&ifibss->incomplete_lock); | |
1690 | } | |
1691 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1692 | ||
46900298 JB |
1693 | switch (ifibss->state) { |
1694 | case IEEE80211_IBSS_MLME_SEARCH: | |
1695 | ieee80211_sta_find_ibss(sdata); | |
1696 | break; | |
1697 | case IEEE80211_IBSS_MLME_JOINED: | |
1698 | ieee80211_sta_merge_ibss(sdata); | |
1699 | break; | |
1700 | default: | |
1701 | WARN_ON(1); | |
1702 | break; | |
1703 | } | |
46900298 | 1704 | |
7a17a33c | 1705 | out: |
8d61ffa5 | 1706 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1707 | } |
1708 | ||
46900298 JB |
1709 | static void ieee80211_ibss_timer(unsigned long data) |
1710 | { | |
1711 | struct ieee80211_sub_if_data *sdata = | |
1712 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 1713 | |
a6182943 | 1714 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1715 | } |
5bb644a0 | 1716 | |
46900298 JB |
1717 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1718 | { | |
1719 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1720 | ||
46900298 JB |
1721 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
1722 | (unsigned long) sdata); | |
8bf11d8d JB |
1723 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1724 | spin_lock_init(&ifibss->incomplete_lock); | |
cd7760e6 SW |
1725 | INIT_WORK(&ifibss->csa_connection_drop_work, |
1726 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1727 | } |
1728 | ||
1729 | /* scan finished notification */ | |
1730 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1731 | { | |
af8cdcd8 | 1732 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1733 | |
29b4a4f7 JB |
1734 | mutex_lock(&local->iflist_mtx); |
1735 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1736 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1737 | continue; |
af8cdcd8 JB |
1738 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1739 | continue; | |
1740 | sdata->u.ibss.last_scan_completed = jiffies; | |
46900298 | 1741 | } |
29b4a4f7 | 1742 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1743 | } |
1744 | ||
af8cdcd8 JB |
1745 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1746 | struct cfg80211_ibss_params *params) | |
1747 | { | |
ff3cc5f4 | 1748 | u32 changed = 0; |
2103dec1 SW |
1749 | u32 rate_flags; |
1750 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1751 | enum ieee80211_chanctx_mode chanmode; |
1752 | struct ieee80211_local *local = sdata->local; | |
1753 | int radar_detect_width = 0; | |
2103dec1 | 1754 | int i; |
71965c1d LC |
1755 | int ret; |
1756 | ||
1757 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1758 | ¶ms->chandef, | |
1759 | sdata->wdev.iftype); | |
1760 | if (ret < 0) | |
1761 | return ret; | |
1762 | ||
1763 | if (ret > 0) { | |
1764 | if (!params->userspace_handles_dfs) | |
1765 | return -EINVAL; | |
1766 | radar_detect_width = BIT(params->chandef.width); | |
1767 | } | |
1768 | ||
1769 | chanmode = (params->channel_fixed && !ret) ? | |
1770 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1771 | ||
1772 | mutex_lock(&local->chanctx_mtx); | |
1773 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1774 | radar_detect_width); | |
1775 | mutex_unlock(&local->chanctx_mtx); | |
1776 | if (ret < 0) | |
1777 | return ret; | |
af8cdcd8 | 1778 | |
af8cdcd8 JB |
1779 | if (params->bssid) { |
1780 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1781 | sdata->u.ibss.fixed_bssid = true; | |
1782 | } else | |
1783 | sdata->u.ibss.fixed_bssid = false; | |
1784 | ||
fffd0934 | 1785 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1786 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1787 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1788 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1789 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1790 | |
1791 | /* fix basic_rates if channel does not support these rates */ | |
1792 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1793 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1794 | for (i = 0; i < sband->n_bitrates; i++) { |
1795 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1796 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1797 | } | |
dd5b4cc7 FF |
1798 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1799 | sizeof(params->mcast_rate)); | |
fffd0934 | 1800 | |
57c4d7b4 JB |
1801 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1802 | ||
3aede78a | 1803 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1804 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1805 | ||
1806 | if (params->ie) { | |
1807 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1808 | GFP_KERNEL); | |
1809 | if (sdata->u.ibss.ie) | |
1810 | sdata->u.ibss.ie_len = params->ie_len; | |
1811 | } | |
1812 | ||
af8cdcd8 JB |
1813 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1814 | sdata->u.ibss.ibss_join_req = jiffies; | |
1815 | ||
badecb00 | 1816 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1817 | sdata->u.ibss.ssid_len = params->ssid_len; |
1818 | ||
822854b0 SW |
1819 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1820 | sizeof(sdata->u.ibss.ht_capa)); | |
1821 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1822 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1823 | ||
ff3cc5f4 SW |
1824 | /* |
1825 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1826 | * reserved, but an HT STA shall protect HT transmissions as though | |
1827 | * the HT Protection field were set to non-HT mixed mode. | |
1828 | * | |
1829 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1830 | * also reserved, but an HT STA shall operate as though this field | |
1831 | * were set to 1. | |
1832 | */ | |
1833 | ||
1834 | sdata->vif.bss_conf.ht_operation_mode |= | |
1835 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1836 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1837 | ||
1838 | changed |= BSS_CHANGED_HT; | |
1839 | ieee80211_bss_info_change_notify(sdata, changed); | |
1840 | ||
04ecd257 | 1841 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
71965c1d | 1842 | sdata->needed_rx_chains = local->rx_chains; |
04ecd257 | 1843 | |
71965c1d | 1844 | ieee80211_queue_work(&local->hw, &sdata->work); |
af8cdcd8 JB |
1845 | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1850 | { | |
5ea096c0 | 1851 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1852 | |
871a4180 | 1853 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1854 | ifibss->ssid_len = 0; |
c84a67a2 | 1855 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1856 | |
1857 | /* remove beacon */ | |
1858 | kfree(sdata->u.ibss.ie); | |
822854b0 SW |
1859 | |
1860 | /* on the next join, re-program HT parameters */ | |
1861 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1862 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1863 | ||
af8cdcd8 | 1864 | synchronize_rcu(); |
af8cdcd8 | 1865 | |
35f20c14 | 1866 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1867 | |
bc05d19f | 1868 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1869 | |
af8cdcd8 JB |
1870 | return 0; |
1871 | } |