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 JB |
128 | |
129 | if (sband->band == IEEE80211_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 | */ | |
351 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; | |
352 | bss_change |= BSS_CHANGED_ERP_SLOT; | |
353 | ||
2ec9c1f6 SW |
354 | /* cf. IEEE 802.11 9.2.12 */ |
355 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) | |
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 | ||
e5a9f8d0 | 652 | sta->rx_stats.last_rx = jiffies; |
8bf11d8d JB |
653 | |
654 | /* make sure mandatory rates are always added */ | |
b422c6cd | 655 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 656 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 657 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 658 | |
52874a5e | 659 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
660 | } |
661 | ||
871a4180 SW |
662 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
663 | { | |
664 | struct ieee80211_local *local = sdata->local; | |
665 | int active = 0; | |
666 | struct sta_info *sta; | |
667 | ||
668 | sdata_assert_lock(sdata); | |
669 | ||
670 | rcu_read_lock(); | |
671 | ||
672 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
673 | if (sta->sdata == sdata && | |
e5a9f8d0 JB |
674 | time_after(sta->rx_stats.last_rx + |
675 | IEEE80211_IBSS_MERGE_INTERVAL, | |
871a4180 SW |
676 | jiffies)) { |
677 | active++; | |
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | rcu_read_unlock(); | |
683 | ||
684 | return active; | |
685 | } | |
686 | ||
687 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
688 | { | |
689 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
690 | struct ieee80211_local *local = sdata->local; | |
691 | struct cfg80211_bss *cbss; | |
692 | struct beacon_data *presp; | |
693 | struct sta_info *sta; | |
871a4180 | 694 | |
d4c80d9d | 695 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
696 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
697 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
698 | ifibss->ssid_len, |
699 | IEEE80211_BSS_TYPE_IBSS, | |
700 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
701 | |
702 | if (cbss) { | |
703 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
704 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
705 | } | |
706 | } | |
707 | ||
708 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
709 | ||
710 | sta_info_flush(sdata); | |
711 | ||
712 | spin_lock_bh(&ifibss->incomplete_lock); | |
713 | while (!list_empty(&ifibss->incomplete_stations)) { | |
714 | sta = list_first_entry(&ifibss->incomplete_stations, | |
715 | struct sta_info, list); | |
716 | list_del(&sta->list); | |
717 | spin_unlock_bh(&ifibss->incomplete_lock); | |
718 | ||
719 | sta_info_free(local, sta); | |
720 | spin_lock_bh(&ifibss->incomplete_lock); | |
721 | } | |
722 | spin_unlock_bh(&ifibss->incomplete_lock); | |
723 | ||
724 | netif_carrier_off(sdata->dev); | |
725 | ||
726 | sdata->vif.bss_conf.ibss_joined = false; | |
727 | sdata->vif.bss_conf.ibss_creator = false; | |
728 | sdata->vif.bss_conf.enable_beacon = false; | |
729 | sdata->vif.bss_conf.ssid_len = 0; | |
730 | ||
731 | /* remove beacon */ | |
732 | presp = rcu_dereference_protected(ifibss->presp, | |
733 | lockdep_is_held(&sdata->wdev.mtx)); | |
734 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); | |
735 | if (presp) | |
736 | kfree_rcu(presp, rcu_head); | |
737 | ||
738 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
739 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
740 | BSS_CHANGED_IBSS); | |
55fff501 | 741 | drv_leave_ibss(local, sdata); |
34a3740d | 742 | mutex_lock(&local->mtx); |
871a4180 | 743 | ieee80211_vif_release_channel(sdata); |
34a3740d | 744 | mutex_unlock(&local->mtx); |
871a4180 SW |
745 | } |
746 | ||
cd7760e6 SW |
747 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
748 | { | |
749 | struct ieee80211_sub_if_data *sdata = | |
750 | container_of(work, struct ieee80211_sub_if_data, | |
751 | u.ibss.csa_connection_drop_work); | |
752 | ||
6f07d216 LC |
753 | sdata_lock(sdata); |
754 | ||
cd7760e6 SW |
755 | ieee80211_ibss_disconnect(sdata); |
756 | synchronize_rcu(); | |
757 | skb_queue_purge(&sdata->skb_queue); | |
758 | ||
759 | /* trigger a scan to find another IBSS network to join */ | |
760 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
6f07d216 LC |
761 | |
762 | sdata_unlock(sdata); | |
cd7760e6 SW |
763 | } |
764 | ||
8e8d347d SW |
765 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
766 | { | |
767 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
768 | int err; | |
769 | ||
770 | /* if the current channel is a DFS channel, mark the channel as | |
771 | * unavailable. | |
772 | */ | |
773 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
774 | &ifibss->chandef, |
775 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
776 | if (err > 0) |
777 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
778 | GFP_ATOMIC); | |
779 | } | |
780 | ||
cd7760e6 SW |
781 | static bool |
782 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
783 | struct ieee802_11_elems *elems, | |
784 | bool beacon) | |
785 | { | |
786 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 787 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 788 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 789 | enum nl80211_channel_type ch_type; |
82a8e17d | 790 | int err; |
cd7760e6 | 791 | u32 sta_flags; |
cd7760e6 | 792 | |
dbd72850 MK |
793 | sdata_assert_lock(sdata); |
794 | ||
cd7760e6 SW |
795 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
796 | switch (ifibss->chandef.width) { | |
797 | case NL80211_CHAN_WIDTH_5: | |
798 | case NL80211_CHAN_WIDTH_10: | |
799 | case NL80211_CHAN_WIDTH_20_NOHT: | |
800 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
801 | /* fall through */ | |
802 | case NL80211_CHAN_WIDTH_20: | |
803 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
804 | break; | |
805 | default: | |
806 | break; | |
807 | } | |
808 | ||
809 | memset(¶ms, 0, sizeof(params)); | |
c0f17eb9 | 810 | memset(&csa_ie, 0, sizeof(csa_ie)); |
84469a45 | 811 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 812 | ifibss->chandef.chan->band, |
c0f17eb9 | 813 | sta_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
814 | /* can't switch to destination channel, fail */ |
815 | if (err < 0) | |
816 | goto disconnect; | |
817 | ||
818 | /* did not contain a CSA */ | |
819 | if (err) | |
820 | return false; | |
821 | ||
0834ae3c SW |
822 | /* channel switch is not supported, disconnect */ |
823 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
824 | goto disconnect; | |
825 | ||
c0f17eb9 CYY |
826 | params.count = csa_ie.count; |
827 | params.chandef = csa_ie.chandef; | |
828 | ||
cd7760e6 SW |
829 | switch (ifibss->chandef.width) { |
830 | case NL80211_CHAN_WIDTH_20_NOHT: | |
831 | case NL80211_CHAN_WIDTH_20: | |
832 | case NL80211_CHAN_WIDTH_40: | |
833 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
834 | * another mode has been announced. The mode is not adopted | |
835 | * within the beacon while doing CSA and we should therefore | |
836 | * keep the mode which we announce. | |
837 | */ | |
838 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
839 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
840 | ch_type); | |
841 | break; | |
842 | case NL80211_CHAN_WIDTH_5: | |
843 | case NL80211_CHAN_WIDTH_10: | |
844 | if (params.chandef.width != ifibss->chandef.width) { | |
845 | sdata_info(sdata, | |
846 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
847 | ifibss->bssid, | |
848 | params.chandef.chan->center_freq, | |
849 | params.chandef.width, | |
850 | params.chandef.center_freq1, | |
851 | params.chandef.center_freq2); | |
852 | goto disconnect; | |
853 | } | |
854 | break; | |
855 | default: | |
856 | /* should not happen, sta_flags should prevent VHT modes. */ | |
857 | WARN_ON(1); | |
858 | goto disconnect; | |
859 | } | |
860 | ||
174e0cd2 IP |
861 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
862 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
863 | sdata_info(sdata, |
864 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
865 | ifibss->bssid, | |
866 | params.chandef.chan->center_freq, | |
867 | params.chandef.width, | |
868 | params.chandef.center_freq1, | |
869 | params.chandef.center_freq2); | |
870 | goto disconnect; | |
871 | } | |
872 | ||
873 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
874 | ¶ms.chandef, |
875 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
876 | if (err < 0) |
877 | goto disconnect; | |
2beb6dab | 878 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 879 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 880 | goto disconnect; |
cd7760e6 SW |
881 | } |
882 | ||
2beb6dab LC |
883 | params.radar_required = err; |
884 | ||
82a8e17d LC |
885 | if (cfg80211_chandef_identical(¶ms.chandef, |
886 | &sdata->vif.bss_conf.chandef)) { | |
887 | ibss_dbg(sdata, | |
888 | "received csa with an identical chandef, ignoring\n"); | |
889 | return true; | |
cd7760e6 | 890 | } |
cd7760e6 SW |
891 | |
892 | /* all checks done, now perform the channel switch. */ | |
893 | ibss_dbg(sdata, | |
894 | "received channel switch announcement to go to channel %d MHz\n", | |
895 | params.chandef.chan->center_freq); | |
896 | ||
c0f17eb9 | 897 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 898 | |
82a8e17d LC |
899 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
900 | ¶ms)) | |
901 | goto disconnect; | |
cd7760e6 | 902 | |
8e8d347d SW |
903 | ieee80211_ibss_csa_mark_radar(sdata); |
904 | ||
cd7760e6 SW |
905 | return true; |
906 | disconnect: | |
907 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
908 | ieee80211_queue_work(&sdata->local->hw, | |
909 | &ifibss->csa_connection_drop_work); | |
910 | ||
8e8d347d SW |
911 | ieee80211_ibss_csa_mark_radar(sdata); |
912 | ||
cd7760e6 SW |
913 | return true; |
914 | } | |
915 | ||
916 | static void | |
917 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
918 | struct ieee80211_mgmt *mgmt, size_t len, | |
919 | struct ieee80211_rx_status *rx_status, | |
920 | struct ieee802_11_elems *elems) | |
921 | { | |
922 | int required_len; | |
923 | ||
924 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
925 | return; | |
926 | ||
927 | /* CSA is the only action we handle for now */ | |
928 | if (mgmt->u.action.u.measurement.action_code != | |
929 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
930 | return; | |
931 | ||
932 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
933 | sizeof(mgmt->u.action.u.chan_switch); | |
934 | if (len < required_len) | |
935 | return; | |
936 | ||
82a8e17d LC |
937 | if (!sdata->vif.csa_active) |
938 | ieee80211_ibss_process_chanswitch(sdata, elems, false); | |
cd7760e6 SW |
939 | } |
940 | ||
2cc59e78 AQ |
941 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
942 | struct ieee80211_mgmt *mgmt, | |
943 | size_t len) | |
944 | { | |
945 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
946 | ||
947 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
948 | return; | |
949 | ||
950 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", | |
951 | mgmt->sa, mgmt->da, mgmt->bssid, reason); | |
952 | sta_info_destroy_addr(sdata, mgmt->sa); | |
953 | } | |
954 | ||
6d810f10 AQ |
955 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
956 | struct ieee80211_mgmt *mgmt, | |
957 | size_t len) | |
958 | { | |
959 | u16 auth_alg, auth_transaction; | |
960 | ||
8d61ffa5 | 961 | sdata_assert_lock(sdata); |
6d810f10 AQ |
962 | |
963 | if (len < 24 + 6) | |
964 | return; | |
965 | ||
966 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
967 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
968 | ||
bdcbd8e0 JB |
969 | ibss_dbg(sdata, |
970 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", | |
971 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
972 | |
973 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
974 | return; | |
975 | ||
6d810f10 AQ |
976 | /* |
977 | * IEEE 802.11 standard does not require authentication in IBSS | |
978 | * networks and most implementations do not seem to use it. | |
979 | * However, try to reply to authentication attempts if someone | |
980 | * has actually implemented this. | |
981 | */ | |
700e8ea6 | 982 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 983 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
984 | } |
985 | ||
8a4988d1 JD |
986 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
987 | struct ieee80211_mgmt *mgmt, size_t len, | |
988 | struct ieee80211_rx_status *rx_status, | |
989 | struct ieee802_11_elems *elems, | |
990 | struct ieee80211_channel *channel) | |
46900298 | 991 | { |
46900298 | 992 | struct sta_info *sta; |
46900298 | 993 | enum ieee80211_band band = rx_status->band; |
74608aca | 994 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 995 | struct ieee80211_local *local = sdata->local; |
13c40c54 AS |
996 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
997 | bool rates_updated = false; | |
8a4988d1 | 998 | u32 supp_rates = 0; |
46900298 | 999 | |
8a4988d1 | 1000 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
1001 | return; |
1002 | ||
8a4988d1 JD |
1003 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
1004 | return; | |
46900298 | 1005 | |
8a4988d1 JD |
1006 | rcu_read_lock(); |
1007 | sta = sta_info_get(sdata, mgmt->sa); | |
1008 | ||
1009 | if (elems->supp_rates) { | |
1010 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
1011 | band, NULL); | |
1012 | if (sta) { | |
1013 | u32 prev_rates; | |
1014 | ||
1015 | prev_rates = sta->sta.supp_rates[band]; | |
1016 | /* make sure mandatory rates are always added */ | |
1017 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
1018 | if (rx_status->flag & RX_FLAG_5MHZ) | |
1019 | scan_width = NL80211_BSS_CHAN_WIDTH_5; | |
1020 | if (rx_status->flag & RX_FLAG_10MHZ) | |
1021 | scan_width = NL80211_BSS_CHAN_WIDTH_10; | |
1022 | ||
1023 | sta->sta.supp_rates[band] = supp_rates | | |
1024 | ieee80211_mandatory_rates(sband, scan_width); | |
1025 | if (sta->sta.supp_rates[band] != prev_rates) { | |
1026 | ibss_dbg(sdata, | |
1027 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1028 | sta->sta.addr, prev_rates, | |
1029 | sta->sta.supp_rates[band]); | |
1030 | rates_updated = true; | |
8bf11d8d | 1031 | } |
8a4988d1 JD |
1032 | } else { |
1033 | rcu_read_unlock(); | |
1034 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1035 | mgmt->sa, supp_rates); | |
34e89507 | 1036 | } |
8a4988d1 | 1037 | } |
9eba6125 | 1038 | |
96a4688e JB |
1039 | if (sta && !sta->sta.wme && |
1040 | elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1041 | sta->sta.wme = true; |
96a4688e JB |
1042 | ieee80211_check_fast_xmit(sta); |
1043 | } | |
13c40c54 | 1044 | |
8a4988d1 JD |
1045 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1046 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1047 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1048 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1049 | /* we both use HT */ | |
1050 | struct ieee80211_ht_cap htcap_ie; | |
1051 | struct cfg80211_chan_def chandef; | |
abcff6ef | 1052 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth; |
d2954457 | 1053 | |
8ac3c704 JB |
1054 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
1055 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); | |
d2954457 | 1056 | |
8a4988d1 | 1057 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1058 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1059 | &htcap_ie, | |
1060 | sta); | |
abcff6ef JD |
1061 | |
1062 | if (elems->vht_operation && elems->vht_cap_elem && | |
1063 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1064 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1065 | /* we both use VHT */ | |
1066 | struct ieee80211_vht_cap cap_ie; | |
1067 | struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap; | |
1068 | ||
8ac3c704 JB |
1069 | ieee80211_chandef_vht_oper(elems->vht_operation, |
1070 | &chandef); | |
abcff6ef JD |
1071 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
1072 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
1073 | &cap_ie, sta); | |
1074 | if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap))) | |
1075 | rates_updated |= true; | |
13c40c54 AS |
1076 | } |
1077 | ||
abcff6ef JD |
1078 | if (bw != sta->sta.bandwidth) |
1079 | rates_updated |= true; | |
d2954457 | 1080 | |
abcff6ef JD |
1081 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1082 | &chandef)) | |
1083 | WARN_ON_ONCE(1); | |
8a4988d1 | 1084 | } |
d2954457 | 1085 | |
8a4988d1 JD |
1086 | if (sta && rates_updated) { |
1087 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
1088 | u8 rx_nss = sta->sta.rx_nss; | |
13c40c54 | 1089 | |
8a4988d1 JD |
1090 | /* Force rx_nss recalculation */ |
1091 | sta->sta.rx_nss = 0; | |
1092 | rate_control_rate_init(sta); | |
1093 | if (sta->sta.rx_nss != rx_nss) | |
1094 | changed |= IEEE80211_RC_NSS_CHANGED; | |
13c40c54 | 1095 | |
8a4988d1 | 1096 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1097 | } |
1098 | ||
8a4988d1 JD |
1099 | rcu_read_unlock(); |
1100 | } | |
1101 | ||
1102 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1103 | struct ieee80211_mgmt *mgmt, size_t len, | |
1104 | struct ieee80211_rx_status *rx_status, | |
1105 | struct ieee802_11_elems *elems) | |
1106 | { | |
1107 | struct ieee80211_local *local = sdata->local; | |
1108 | struct cfg80211_bss *cbss; | |
1109 | struct ieee80211_bss *bss; | |
1110 | struct ieee80211_channel *channel; | |
1111 | u64 beacon_timestamp, rx_timestamp; | |
1112 | u32 supp_rates = 0; | |
1113 | enum ieee80211_band band = rx_status->band; | |
1114 | ||
1115 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1116 | if (!channel) | |
1117 | return; | |
1118 | ||
1119 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1120 | ||
46900298 | 1121 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 1122 | channel); |
46900298 JB |
1123 | if (!bss) |
1124 | return; | |
1125 | ||
0c1ad2ca JB |
1126 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1127 | ||
8cef2c9d JB |
1128 | /* same for beacon and probe response */ |
1129 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1130 | |
1131 | /* check if we need to merge IBSS */ | |
1132 | ||
46900298 | 1133 | /* not an IBSS */ |
0c1ad2ca | 1134 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1135 | goto put_bss; |
1136 | ||
1137 | /* different channel */ | |
55de908a | 1138 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1139 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1140 | goto put_bss; |
1141 | ||
1142 | /* different SSID */ | |
1143 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1144 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1145 | sdata->u.ibss.ssid_len)) | |
1146 | goto put_bss; | |
1147 | ||
cd7760e6 | 1148 | /* process channel switch */ |
82a8e17d LC |
1149 | if (sdata->vif.csa_active || |
1150 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) | |
cd7760e6 SW |
1151 | goto put_bss; |
1152 | ||
34e8f082 | 1153 | /* same BSSID */ |
b203ca39 | 1154 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1155 | goto put_bss; |
1156 | ||
cd7760e6 SW |
1157 | /* we use a fixed BSSID */ |
1158 | if (sdata->u.ibss.fixed_bssid) | |
1159 | goto put_bss; | |
1160 | ||
f4bda337 TP |
1161 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1162 | /* time when timestamp field was received */ | |
1163 | rx_timestamp = | |
1164 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1165 | len + FCS_LEN, 24); | |
24487981 JB |
1166 | } else { |
1167 | /* | |
1168 | * second best option: get current TSF | |
1169 | * (will return -1 if not supported) | |
1170 | */ | |
37a41b4a | 1171 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1172 | } |
46900298 | 1173 | |
bdcbd8e0 JB |
1174 | ibss_dbg(sdata, |
1175 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1176 | mgmt->sa, mgmt->bssid, | |
1177 | (unsigned long long)rx_timestamp, | |
1178 | (unsigned long long)beacon_timestamp, | |
1179 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1180 | jiffies); | |
46900298 JB |
1181 | |
1182 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1183 | ibss_dbg(sdata, |
1184 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1185 | mgmt->bssid); | |
46900298 | 1186 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1187 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1188 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1189 | supp_rates); |
8bf11d8d | 1190 | rcu_read_unlock(); |
46900298 JB |
1191 | } |
1192 | ||
1193 | put_bss: | |
1194 | ieee80211_rx_bss_put(local, bss); | |
1195 | } | |
1196 | ||
8bf11d8d JB |
1197 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1198 | const u8 *bssid, const u8 *addr, | |
1199 | u32 supp_rates) | |
46900298 | 1200 | { |
2e10d330 | 1201 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1202 | struct ieee80211_local *local = sdata->local; |
1203 | struct sta_info *sta; | |
55de908a | 1204 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1205 | struct ieee80211_supported_band *sband; |
74608aca | 1206 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1207 | int band; |
46900298 | 1208 | |
af8cdcd8 JB |
1209 | /* |
1210 | * XXX: Consider removing the least recently used entry and | |
1211 | * allow new one to be added. | |
1212 | */ | |
46900298 | 1213 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1214 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1215 | sdata->name, addr); |
8bf11d8d | 1216 | return; |
46900298 JB |
1217 | } |
1218 | ||
2e10d330 | 1219 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1220 | return; |
2e10d330 | 1221 | |
b203ca39 | 1222 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1223 | return; |
46900298 | 1224 | |
55de908a JB |
1225 | rcu_read_lock(); |
1226 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1227 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
1228 | rcu_read_unlock(); | |
1229 | return; | |
1230 | } | |
4bf88530 | 1231 | band = chanctx_conf->def.chan->band; |
74608aca | 1232 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1233 | rcu_read_unlock(); |
1234 | ||
8bf11d8d | 1235 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1236 | if (!sta) |
8bf11d8d | 1237 | return; |
46900298 | 1238 | |
e5a9f8d0 | 1239 | sta->rx_stats.last_rx = jiffies; |
d9a7ddb0 | 1240 | |
46900298 | 1241 | /* make sure mandatory rates are always added */ |
b422c6cd | 1242 | sband = local->hw.wiphy->bands[band]; |
46900298 | 1243 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 1244 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1245 | |
8bf11d8d JB |
1246 | spin_lock(&ifibss->incomplete_lock); |
1247 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1248 | spin_unlock(&ifibss->incomplete_lock); | |
1249 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
1250 | } |
1251 | ||
dad9defd AQ |
1252 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1253 | { | |
1254 | struct ieee80211_local *local = sdata->local; | |
1255 | struct sta_info *sta, *tmp; | |
1256 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
e5a9f8d0 | 1257 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
dad9defd AQ |
1258 | |
1259 | mutex_lock(&local->sta_mtx); | |
1260 | ||
1261 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
1262 | if (sdata != sta->sdata) | |
1263 | continue; | |
1264 | ||
e5a9f8d0 JB |
1265 | if (time_after(jiffies, sta->rx_stats.last_rx + exp_time) || |
1266 | (time_after(jiffies, sta->rx_stats.last_rx + exp_rsn) && | |
dad9defd AQ |
1267 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
1268 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
1269 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1270 | "not authorized " : "", sta->sta.addr); | |
1271 | ||
1272 | WARN_ON(__sta_info_destroy(sta)); | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | mutex_unlock(&local->sta_mtx); | |
1277 | } | |
1278 | ||
ce9058ae BP |
1279 | /* |
1280 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1281 | */ | |
46900298 JB |
1282 | |
1283 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1284 | { | |
1285 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1286 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1287 | |
8d61ffa5 | 1288 | sdata_assert_lock(sdata); |
7a17a33c | 1289 | |
af8cdcd8 JB |
1290 | mod_timer(&ifibss->timer, |
1291 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1292 | |
dad9defd | 1293 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1294 | |
450aae3d S |
1295 | if (time_before(jiffies, ifibss->last_scan_completed + |
1296 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1297 | return; | |
1298 | ||
46900298 JB |
1299 | if (ieee80211_sta_active_ibss(sdata)) |
1300 | return; | |
1301 | ||
c037b836 | 1302 | if (ifibss->fixed_channel) |
46900298 JB |
1303 | return; |
1304 | ||
bdcbd8e0 JB |
1305 | sdata_info(sdata, |
1306 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1307 | |
7ca15a0a | 1308 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1309 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1310 | NULL, 0, scan_width); |
46900298 JB |
1311 | } |
1312 | ||
af8cdcd8 | 1313 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1314 | { |
1315 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1316 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1317 | u16 capability; |
1318 | int i; | |
1319 | ||
8d61ffa5 | 1320 | sdata_assert_lock(sdata); |
7a17a33c | 1321 | |
af8cdcd8 | 1322 | if (ifibss->fixed_bssid) { |
46900298 JB |
1323 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1324 | } else { | |
1325 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1326 | * own MAC address to make sure that devices that do not have proper | |
1327 | * random number generator get different BSSID. */ | |
1328 | get_random_bytes(bssid, ETH_ALEN); | |
1329 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1330 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1331 | bssid[0] &= ~0x01; |
1332 | bssid[0] |= 0x02; | |
1333 | } | |
1334 | ||
bdcbd8e0 | 1335 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1336 | |
46900298 JB |
1337 | capability = WLAN_CAPABILITY_IBSS; |
1338 | ||
fffd0934 | 1339 | if (ifibss->privacy) |
46900298 | 1340 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1341 | |
57c4d7b4 | 1342 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1343 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1344 | capability, 0, true); |
46900298 JB |
1345 | } |
1346 | ||
76bed0f4 JD |
1347 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
1348 | struct ieee80211_channel **channels, | |
1349 | unsigned int channels_max, | |
1350 | u32 center_freq, u32 width) | |
1351 | { | |
1352 | struct ieee80211_channel *chan = NULL; | |
1353 | unsigned int n_chan = 0; | |
1354 | u32 start_freq, end_freq, freq; | |
1355 | ||
1356 | if (width <= 20) { | |
1357 | start_freq = center_freq; | |
1358 | end_freq = center_freq; | |
1359 | } else { | |
1360 | start_freq = center_freq - width / 2 + 10; | |
1361 | end_freq = center_freq + width / 2 - 10; | |
1362 | } | |
1363 | ||
1364 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1365 | chan = ieee80211_get_channel(wiphy, freq); | |
1366 | if (!chan) | |
1367 | continue; | |
1368 | if (n_chan >= channels_max) | |
1369 | return n_chan; | |
1370 | ||
1371 | channels[n_chan] = chan; | |
1372 | n_chan++; | |
1373 | } | |
1374 | ||
1375 | return n_chan; | |
1376 | } | |
1377 | ||
1378 | static unsigned int | |
1379 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1380 | const struct cfg80211_chan_def *chandef, | |
1381 | struct ieee80211_channel **channels, | |
1382 | unsigned int channels_max) | |
1383 | { | |
1384 | unsigned int n_chan = 0; | |
1385 | u32 width, cf1, cf2 = 0; | |
1386 | ||
1387 | switch (chandef->width) { | |
1388 | case NL80211_CHAN_WIDTH_40: | |
1389 | width = 40; | |
1390 | break; | |
1391 | case NL80211_CHAN_WIDTH_80P80: | |
1392 | cf2 = chandef->center_freq2; | |
1393 | /* fall through */ | |
1394 | case NL80211_CHAN_WIDTH_80: | |
1395 | width = 80; | |
1396 | break; | |
1397 | case NL80211_CHAN_WIDTH_160: | |
1398 | width = 160; | |
1399 | break; | |
1400 | default: | |
1401 | width = 20; | |
1402 | break; | |
1403 | } | |
1404 | ||
1405 | cf1 = chandef->center_freq1; | |
1406 | ||
1407 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1408 | ||
1409 | if (cf2) | |
1410 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1411 | channels_max - n_chan, cf2, | |
1412 | width); | |
1413 | ||
1414 | return n_chan; | |
1415 | } | |
1416 | ||
ce9058ae BP |
1417 | /* |
1418 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1419 | */ | |
1420 | ||
af8cdcd8 | 1421 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1422 | { |
1423 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1424 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1425 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1426 | struct ieee80211_channel *chan = NULL; |
46900298 | 1427 | const u8 *bssid = NULL; |
7ca15a0a | 1428 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1429 | int active_ibss; |
1430 | ||
8d61ffa5 | 1431 | sdata_assert_lock(sdata); |
7a17a33c | 1432 | |
46900298 | 1433 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1434 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1435 | |
1436 | if (active_ibss) | |
af8cdcd8 | 1437 | return; |
46900298 | 1438 | |
af8cdcd8 JB |
1439 | if (ifibss->fixed_bssid) |
1440 | bssid = ifibss->bssid; | |
1441 | if (ifibss->fixed_channel) | |
3aede78a | 1442 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1443 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1444 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1445 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1446 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1447 | IEEE80211_BSS_TYPE_IBSS, |
1448 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1449 | |
1450 | if (cbss) { | |
1451 | struct ieee80211_bss *bss; | |
46900298 | 1452 | |
0c1ad2ca | 1453 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1454 | ibss_dbg(sdata, |
1455 | "sta_find_ibss: selected %pM current %pM\n", | |
1456 | cbss->bssid, ifibss->bssid); | |
1457 | sdata_info(sdata, | |
1458 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1459 | cbss->bssid); | |
46900298 | 1460 | |
af8cdcd8 | 1461 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1462 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1463 | return; |
d419b9f0 | 1464 | } |
46900298 | 1465 | |
d8eb741e AQ |
1466 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1467 | * directly and do not waste time scanning | |
1468 | */ | |
1469 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1470 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1471 | bssid); | |
1472 | ieee80211_sta_create_ibss(sdata); | |
1473 | return; | |
1474 | } | |
1475 | ||
1476 | ||
bdcbd8e0 | 1477 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1478 | |
1479 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1480 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1481 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1482 | struct ieee80211_channel *channels[8]; |
1483 | unsigned int num; | |
1484 | ||
bdcbd8e0 | 1485 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1486 | |
7ca15a0a | 1487 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
d321cd01 SS |
1488 | |
1489 | if (ifibss->fixed_channel) { | |
1490 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, | |
1491 | &ifibss->chandef, | |
1492 | channels, | |
1493 | ARRAY_SIZE(channels)); | |
1494 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1495 | ifibss->ssid_len, channels, | |
1496 | num, scan_width); | |
1497 | } else { | |
1498 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1499 | ifibss->ssid_len, NULL, | |
1500 | 0, scan_width); | |
1501 | } | |
ce9058ae | 1502 | } else { |
46900298 JB |
1503 | int interval = IEEE80211_SCAN_INTERVAL; |
1504 | ||
1505 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1506 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1507 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1508 | |
af8cdcd8 JB |
1509 | mod_timer(&ifibss->timer, |
1510 | round_jiffies(jiffies + interval)); | |
46900298 | 1511 | } |
46900298 JB |
1512 | } |
1513 | ||
1514 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1515 | struct sk_buff *req) |
46900298 | 1516 | { |
c269a203 | 1517 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1518 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1519 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1520 | int tx_last_beacon, len = req->len; |
46900298 | 1521 | struct sk_buff *skb; |
c3ffeab4 | 1522 | struct beacon_data *presp; |
46900298 JB |
1523 | u8 *pos, *end; |
1524 | ||
8d61ffa5 | 1525 | sdata_assert_lock(sdata); |
7a17a33c | 1526 | |
40b275b6 | 1527 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1528 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1529 | |
46900298 | 1530 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1531 | len < 24 + 2 || !presp) |
46900298 JB |
1532 | return; |
1533 | ||
24487981 | 1534 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1535 | |
bdcbd8e0 JB |
1536 | ibss_dbg(sdata, |
1537 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", | |
1538 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); | |
46900298 | 1539 | |
1ed76487 | 1540 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1541 | return; |
1542 | ||
b203ca39 | 1543 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1544 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1545 | return; |
1546 | ||
1547 | end = ((u8 *) mgmt) + len; | |
1548 | pos = mgmt->u.probe_req.variable; | |
1549 | if (pos[0] != WLAN_EID_SSID || | |
1550 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1551 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1552 | mgmt->sa); | |
46900298 JB |
1553 | return; |
1554 | } | |
1555 | if (pos[1] != 0 && | |
1556 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1557 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1558 | /* Ignore ProbeReq for foreign SSID */ |
1559 | return; | |
1560 | } | |
1561 | ||
1562 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1563 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1564 | if (!skb) |
1565 | return; | |
1566 | ||
c3ffeab4 JB |
1567 | skb_reserve(skb, local->tx_headroom); |
1568 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); | |
1569 | ||
1570 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1571 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1572 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1573 | |
1574 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1575 | if (pos[1] == 0) | |
1576 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1577 | ||
62ae67be | 1578 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1579 | } |
1580 | ||
d45c4172 EG |
1581 | static |
1582 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1583 | struct ieee80211_mgmt *mgmt, size_t len, | |
1584 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1585 | { |
1586 | size_t baselen; | |
1587 | struct ieee802_11_elems elems; | |
1588 | ||
d45c4172 EG |
1589 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1590 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1591 | ||
1592 | /* | |
1593 | * either beacon or probe_resp but the variable field is at the | |
1594 | * same offset | |
1595 | */ | |
46900298 JB |
1596 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1597 | if (baselen > len) | |
1598 | return; | |
1599 | ||
1600 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1601 | false, &elems); |
46900298 | 1602 | |
d45c4172 | 1603 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1604 | } |
1605 | ||
1fa57d01 JB |
1606 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1607 | struct sk_buff *skb) | |
46900298 JB |
1608 | { |
1609 | struct ieee80211_rx_status *rx_status; | |
1610 | struct ieee80211_mgmt *mgmt; | |
1611 | u16 fc; | |
cd7760e6 SW |
1612 | struct ieee802_11_elems elems; |
1613 | int ies_len; | |
46900298 | 1614 | |
f1d58c25 | 1615 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1616 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1617 | fc = le16_to_cpu(mgmt->frame_control); | |
1618 | ||
8d61ffa5 | 1619 | sdata_lock(sdata); |
7a17a33c | 1620 | |
c926d006 TH |
1621 | if (!sdata->u.ibss.ssid_len) |
1622 | goto mgmt_out; /* not ready to merge yet */ | |
1623 | ||
46900298 JB |
1624 | switch (fc & IEEE80211_FCTL_STYPE) { |
1625 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1626 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1627 | break; |
1628 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1629 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1630 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1631 | rx_status); | |
46900298 JB |
1632 | break; |
1633 | case IEEE80211_STYPE_AUTH: | |
1634 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1635 | break; | |
2cc59e78 AQ |
1636 | case IEEE80211_STYPE_DEAUTH: |
1637 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1638 | break; | |
cd7760e6 SW |
1639 | case IEEE80211_STYPE_ACTION: |
1640 | switch (mgmt->u.action.category) { | |
1641 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1642 | ies_len = skb->len - | |
1643 | offsetof(struct ieee80211_mgmt, | |
1644 | u.action.u.chan_switch.variable); | |
1645 | ||
1646 | if (ies_len < 0) | |
1647 | break; | |
1648 | ||
1649 | ieee802_11_parse_elems( | |
1650 | mgmt->u.action.u.chan_switch.variable, | |
1651 | ies_len, true, &elems); | |
1652 | ||
1653 | if (elems.parse_error) | |
1654 | break; | |
1655 | ||
1656 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, | |
1657 | rx_status, &elems); | |
1658 | break; | |
1659 | } | |
46900298 | 1660 | } |
7a17a33c | 1661 | |
c926d006 | 1662 | mgmt_out: |
8d61ffa5 | 1663 | sdata_unlock(sdata); |
46900298 JB |
1664 | } |
1665 | ||
1fa57d01 | 1666 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1667 | { |
1fa57d01 | 1668 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1669 | struct sta_info *sta; |
46900298 | 1670 | |
8d61ffa5 | 1671 | sdata_lock(sdata); |
7a17a33c JB |
1672 | |
1673 | /* | |
1674 | * Work could be scheduled after scan or similar | |
1675 | * when we aren't even joined (or trying) with a | |
1676 | * network. | |
1677 | */ | |
1678 | if (!ifibss->ssid_len) | |
1679 | goto out; | |
46900298 | 1680 | |
8bf11d8d JB |
1681 | spin_lock_bh(&ifibss->incomplete_lock); |
1682 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1683 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1684 | struct sta_info, list); | |
1685 | list_del(&sta->list); | |
1686 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1687 | ||
52874a5e | 1688 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1689 | rcu_read_unlock(); |
1690 | spin_lock_bh(&ifibss->incomplete_lock); | |
1691 | } | |
1692 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1693 | ||
46900298 JB |
1694 | switch (ifibss->state) { |
1695 | case IEEE80211_IBSS_MLME_SEARCH: | |
1696 | ieee80211_sta_find_ibss(sdata); | |
1697 | break; | |
1698 | case IEEE80211_IBSS_MLME_JOINED: | |
1699 | ieee80211_sta_merge_ibss(sdata); | |
1700 | break; | |
1701 | default: | |
1702 | WARN_ON(1); | |
1703 | break; | |
1704 | } | |
46900298 | 1705 | |
7a17a33c | 1706 | out: |
8d61ffa5 | 1707 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1708 | } |
1709 | ||
46900298 JB |
1710 | static void ieee80211_ibss_timer(unsigned long data) |
1711 | { | |
1712 | struct ieee80211_sub_if_data *sdata = | |
1713 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 1714 | |
a6182943 | 1715 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1716 | } |
5bb644a0 | 1717 | |
46900298 JB |
1718 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1719 | { | |
1720 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1721 | ||
46900298 JB |
1722 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
1723 | (unsigned long) sdata); | |
8bf11d8d JB |
1724 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1725 | spin_lock_init(&ifibss->incomplete_lock); | |
cd7760e6 SW |
1726 | INIT_WORK(&ifibss->csa_connection_drop_work, |
1727 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1728 | } |
1729 | ||
1730 | /* scan finished notification */ | |
1731 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1732 | { | |
af8cdcd8 | 1733 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1734 | |
29b4a4f7 JB |
1735 | mutex_lock(&local->iflist_mtx); |
1736 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1737 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1738 | continue; |
af8cdcd8 JB |
1739 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1740 | continue; | |
1741 | sdata->u.ibss.last_scan_completed = jiffies; | |
46900298 | 1742 | } |
29b4a4f7 | 1743 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1744 | } |
1745 | ||
af8cdcd8 JB |
1746 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1747 | struct cfg80211_ibss_params *params) | |
1748 | { | |
ff3cc5f4 | 1749 | u32 changed = 0; |
2103dec1 SW |
1750 | u32 rate_flags; |
1751 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1752 | enum ieee80211_chanctx_mode chanmode; |
1753 | struct ieee80211_local *local = sdata->local; | |
1754 | int radar_detect_width = 0; | |
2103dec1 | 1755 | int i; |
71965c1d LC |
1756 | int ret; |
1757 | ||
1758 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1759 | ¶ms->chandef, | |
1760 | sdata->wdev.iftype); | |
1761 | if (ret < 0) | |
1762 | return ret; | |
1763 | ||
1764 | if (ret > 0) { | |
1765 | if (!params->userspace_handles_dfs) | |
1766 | return -EINVAL; | |
1767 | radar_detect_width = BIT(params->chandef.width); | |
1768 | } | |
1769 | ||
1770 | chanmode = (params->channel_fixed && !ret) ? | |
1771 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1772 | ||
1773 | mutex_lock(&local->chanctx_mtx); | |
1774 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1775 | radar_detect_width); | |
1776 | mutex_unlock(&local->chanctx_mtx); | |
1777 | if (ret < 0) | |
1778 | return ret; | |
af8cdcd8 | 1779 | |
af8cdcd8 JB |
1780 | if (params->bssid) { |
1781 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1782 | sdata->u.ibss.fixed_bssid = true; | |
1783 | } else | |
1784 | sdata->u.ibss.fixed_bssid = false; | |
1785 | ||
fffd0934 | 1786 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1787 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1788 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1789 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1790 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1791 | |
1792 | /* fix basic_rates if channel does not support these rates */ | |
1793 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1794 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1795 | for (i = 0; i < sband->n_bitrates; i++) { |
1796 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1797 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1798 | } | |
dd5b4cc7 FF |
1799 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1800 | sizeof(params->mcast_rate)); | |
fffd0934 | 1801 | |
57c4d7b4 JB |
1802 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1803 | ||
3aede78a | 1804 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1805 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1806 | ||
1807 | if (params->ie) { | |
1808 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1809 | GFP_KERNEL); | |
1810 | if (sdata->u.ibss.ie) | |
1811 | sdata->u.ibss.ie_len = params->ie_len; | |
1812 | } | |
1813 | ||
af8cdcd8 JB |
1814 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1815 | sdata->u.ibss.ibss_join_req = jiffies; | |
1816 | ||
badecb00 | 1817 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1818 | sdata->u.ibss.ssid_len = params->ssid_len; |
1819 | ||
822854b0 SW |
1820 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1821 | sizeof(sdata->u.ibss.ht_capa)); | |
1822 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1823 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1824 | ||
ff3cc5f4 SW |
1825 | /* |
1826 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1827 | * reserved, but an HT STA shall protect HT transmissions as though | |
1828 | * the HT Protection field were set to non-HT mixed mode. | |
1829 | * | |
1830 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1831 | * also reserved, but an HT STA shall operate as though this field | |
1832 | * were set to 1. | |
1833 | */ | |
1834 | ||
1835 | sdata->vif.bss_conf.ht_operation_mode |= | |
1836 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1837 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1838 | ||
1839 | changed |= BSS_CHANGED_HT; | |
1840 | ieee80211_bss_info_change_notify(sdata, changed); | |
1841 | ||
04ecd257 | 1842 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
71965c1d | 1843 | sdata->needed_rx_chains = local->rx_chains; |
04ecd257 | 1844 | |
71965c1d | 1845 | ieee80211_queue_work(&local->hw, &sdata->work); |
af8cdcd8 JB |
1846 | |
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1851 | { | |
5ea096c0 | 1852 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1853 | |
871a4180 | 1854 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1855 | ifibss->ssid_len = 0; |
c84a67a2 | 1856 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1857 | |
1858 | /* remove beacon */ | |
1859 | kfree(sdata->u.ibss.ie); | |
822854b0 SW |
1860 | |
1861 | /* on the next join, re-program HT parameters */ | |
1862 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1863 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1864 | ||
af8cdcd8 | 1865 | synchronize_rcu(); |
af8cdcd8 | 1866 | |
35f20c14 | 1867 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1868 | |
bc05d19f | 1869 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1870 | |
af8cdcd8 JB |
1871 | return 0; |
1872 | } |