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 |
46900298 JB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
16 | #include <linux/delay.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
46900298 JB |
18 | #include <linux/if_ether.h> |
19 | #include <linux/skbuff.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/etherdevice.h> | |
22 | #include <linux/rtnetlink.h> | |
23 | #include <net/mac80211.h> | |
46900298 JB |
24 | |
25 | #include "ieee80211_i.h" | |
24487981 | 26 | #include "driver-ops.h" |
46900298 JB |
27 | #include "rate.h" |
28 | ||
29 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
46900298 JB |
30 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
31 | ||
32 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
33 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
dad9defd | 34 | #define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ) |
46900298 JB |
35 | |
36 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
37 | ||
d51b70ff SW |
38 | static struct beacon_data * |
39 | ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, | |
40 | const int beacon_int, const u32 basic_rates, | |
41 | const u16 capability, u64 tsf, | |
42 | struct cfg80211_chan_def *chandef, | |
cd7760e6 SW |
43 | bool *have_higher_than_11mbit, |
44 | struct cfg80211_csa_settings *csa_settings) | |
46900298 JB |
45 | { |
46 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
47 | struct ieee80211_local *local = sdata->local; | |
2103dec1 | 48 | int rates_n = 0, i, ri; |
46900298 JB |
49 | struct ieee80211_mgmt *mgmt; |
50 | u8 *pos; | |
51 | struct ieee80211_supported_band *sband; | |
d51b70ff | 52 | u32 rate_flags, rates = 0, rates_added = 0; |
c3ffeab4 JB |
53 | struct beacon_data *presp; |
54 | int frame_len; | |
2103dec1 | 55 | int shift; |
24487981 | 56 | |
46900298 | 57 | /* Build IBSS probe response */ |
c3ffeab4 JB |
58 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
59 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
60 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
61 | 2 + 8 /* max Supported Rates */ + | |
62 | 3 /* max DS params */ + | |
63 | 4 /* IBSS params */ + | |
cd7760e6 | 64 | 5 /* Channel Switch Announcement */ + |
c3ffeab4 JB |
65 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
66 | 2 + sizeof(struct ieee80211_ht_cap) + | |
67 | 2 + sizeof(struct ieee80211_ht_operation) + | |
68 | ifibss->ie_len; | |
69 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); | |
70 | if (!presp) | |
d51b70ff | 71 | return NULL; |
c3ffeab4 JB |
72 | |
73 | presp->head = (void *)(presp + 1); | |
74 | ||
75 | mgmt = (void *) presp->head; | |
46900298 JB |
76 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
77 | IEEE80211_STYPE_PROBE_RESP); | |
e83e6541 | 78 | eth_broadcast_addr(mgmt->da); |
47846c9b | 79 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 80 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 81 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 82 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
83 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
84 | ||
c3ffeab4 JB |
85 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
86 | ||
46900298 JB |
87 | *pos++ = WLAN_EID_SSID; |
88 | *pos++ = ifibss->ssid_len; | |
89 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
c3ffeab4 | 90 | pos += ifibss->ssid_len; |
46900298 | 91 | |
d51b70ff SW |
92 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
93 | rate_flags = ieee80211_chandef_rate_flags(chandef); | |
94 | shift = ieee80211_chandef_get_shift(chandef); | |
95 | rates_n = 0; | |
96 | if (have_higher_than_11mbit) | |
97 | *have_higher_than_11mbit = false; | |
98 | ||
2103dec1 SW |
99 | for (i = 0; i < sband->n_bitrates; i++) { |
100 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
101 | continue; | |
d51b70ff SW |
102 | if (sband->bitrates[i].bitrate > 110 && |
103 | have_higher_than_11mbit) | |
104 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
105 | |
106 | rates |= BIT(i); | |
107 | rates_n++; | |
108 | } | |
109 | ||
46900298 | 110 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
111 | *pos++ = min_t(int, 8, rates_n); |
112 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
113 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
114 | 5 * (1 << shift)); | |
c3ffeab4 | 115 | u8 basic = 0; |
2103dec1 SW |
116 | if (!(rates & BIT(ri))) |
117 | continue; | |
118 | ||
119 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 120 | basic = 0x80; |
2103dec1 | 121 | *pos++ = basic | (u8) rate; |
93c75786 SW |
122 | if (++rates_added == 8) { |
123 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 124 | break; |
93c75786 | 125 | } |
c3ffeab4 | 126 | } |
46900298 JB |
127 | |
128 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
46900298 JB |
129 | *pos++ = WLAN_EID_DS_PARAMS; |
130 | *pos++ = 1; | |
d51b70ff SW |
131 | *pos++ = ieee80211_frequency_to_channel( |
132 | chandef->chan->center_freq); | |
46900298 JB |
133 | } |
134 | ||
46900298 JB |
135 | *pos++ = WLAN_EID_IBSS_PARAMS; |
136 | *pos++ = 2; | |
137 | /* FIX: set ATIM window based on scan results */ | |
138 | *pos++ = 0; | |
139 | *pos++ = 0; | |
140 | ||
cd7760e6 SW |
141 | if (csa_settings) { |
142 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
143 | *pos++ = 3; | |
144 | *pos++ = csa_settings->block_tx ? 1 : 0; | |
145 | *pos++ = ieee80211_frequency_to_channel( | |
146 | csa_settings->chandef.chan->center_freq); | |
af296bdb | 147 | presp->csa_counter_offsets[0] = (pos - presp->head); |
cd7760e6 SW |
148 | *pos++ = csa_settings->count; |
149 | } | |
150 | ||
2103dec1 SW |
151 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
152 | if (rates_n > 8) { | |
46900298 | 153 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
154 | *pos++ = rates_n - 8; |
155 | for (; ri < sband->n_bitrates; ri++) { | |
156 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
157 | 5 * (1 << shift)); | |
c3ffeab4 | 158 | u8 basic = 0; |
2103dec1 SW |
159 | if (!(rates & BIT(ri))) |
160 | continue; | |
161 | ||
162 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 163 | basic = 0x80; |
2103dec1 | 164 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 165 | } |
46900298 JB |
166 | } |
167 | ||
c3ffeab4 JB |
168 | if (ifibss->ie_len) { |
169 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
170 | pos += ifibss->ie_len; | |
171 | } | |
af8cdcd8 | 172 | |
13c40c54 | 173 | /* add HT capability and information IEs */ |
d51b70ff SW |
174 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
175 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
176 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 177 | sband->ht_cap.ht_supported) { |
822854b0 SW |
178 | struct ieee80211_sta_ht_cap ht_cap; |
179 | ||
180 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
181 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
182 | ||
183 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
184 | /* |
185 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
186 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
187 | * keep them at 0 | |
188 | */ | |
074d46d1 | 189 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
d51b70ff | 190 | chandef, 0); |
13c40c54 AS |
191 | } |
192 | ||
40b861a0 AN |
193 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
194 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 195 | |
c3ffeab4 JB |
196 | presp->head_len = pos - presp->head; |
197 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
198 | goto error; |
199 | ||
200 | return presp; | |
201 | error: | |
202 | kfree(presp); | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
207 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 208 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
209 | const u32 basic_rates, |
210 | const u16 capability, u64 tsf, | |
211 | bool creator) | |
212 | { | |
213 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
214 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
215 | struct ieee80211_mgmt *mgmt; |
216 | struct cfg80211_bss *bss; | |
217 | u32 bss_change; | |
218 | struct cfg80211_chan_def chandef; | |
b35c8097 | 219 | struct ieee80211_channel *chan; |
d51b70ff SW |
220 | struct beacon_data *presp; |
221 | enum nl80211_bss_scan_width scan_width; | |
222 | bool have_higher_than_11mbit; | |
2beb6dab | 223 | bool radar_required; |
55fff501 | 224 | int err; |
d51b70ff SW |
225 | |
226 | sdata_assert_lock(sdata); | |
227 | ||
228 | /* Reset own TSF to allow time synchronization work. */ | |
229 | drv_reset_tsf(local, sdata); | |
230 | ||
231 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
232 | sta_info_flush(sdata); | |
233 | ||
234 | /* if merging, indicate to driver that we leave the old IBSS */ | |
235 | if (sdata->vif.bss_conf.ibss_joined) { | |
236 | sdata->vif.bss_conf.ibss_joined = false; | |
237 | sdata->vif.bss_conf.ibss_creator = false; | |
238 | sdata->vif.bss_conf.enable_beacon = false; | |
239 | netif_carrier_off(sdata->dev); | |
240 | ieee80211_bss_info_change_notify(sdata, | |
241 | BSS_CHANGED_IBSS | | |
242 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 243 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
244 | } |
245 | ||
246 | presp = rcu_dereference_protected(ifibss->presp, | |
247 | lockdep_is_held(&sdata->wdev.mtx)); | |
0c2bef46 | 248 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
249 | if (presp) |
250 | kfree_rcu(presp, rcu_head); | |
251 | ||
b35c8097 JL |
252 | /* make a copy of the chandef, it could be modified below. */ |
253 | chandef = *req_chandef; | |
254 | chan = chandef.chan; | |
174e0cd2 IP |
255 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
256 | NL80211_IFTYPE_ADHOC)) { | |
d51b70ff SW |
257 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
258 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
259 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
260 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
261 | sdata_info(sdata, | |
262 | "Failed to join IBSS, beacons forbidden\n"); | |
263 | return; | |
264 | } | |
265 | chandef.width = NL80211_CHAN_WIDTH_20; | |
266 | chandef.center_freq1 = chan->center_freq; | |
8e8d347d | 267 | /* check again for downgraded chandef */ |
174e0cd2 IP |
268 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
269 | NL80211_IFTYPE_ADHOC)) { | |
8e8d347d SW |
270 | sdata_info(sdata, |
271 | "Failed to join IBSS, beacons forbidden\n"); | |
272 | return; | |
273 | } | |
274 | } | |
275 | ||
276 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab | 277 | &chandef, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
278 | if (err < 0) { |
279 | sdata_info(sdata, | |
280 | "Failed to join IBSS, invalid chandef\n"); | |
281 | return; | |
282 | } | |
2beb6dab LC |
283 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
284 | sdata_info(sdata, | |
285 | "Failed to join IBSS, DFS channel without control program\n"); | |
286 | return; | |
d51b70ff SW |
287 | } |
288 | ||
2beb6dab LC |
289 | radar_required = err; |
290 | ||
34a3740d | 291 | mutex_lock(&local->mtx); |
d51b70ff SW |
292 | if (ieee80211_vif_use_channel(sdata, &chandef, |
293 | ifibss->fixed_channel ? | |
294 | IEEE80211_CHANCTX_SHARED : | |
295 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
296 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
34a3740d | 297 | mutex_unlock(&local->mtx); |
d51b70ff SW |
298 | return; |
299 | } | |
cc901de1 | 300 | sdata->radar_required = radar_required; |
34a3740d | 301 | mutex_unlock(&local->mtx); |
d51b70ff SW |
302 | |
303 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
304 | ||
d51b70ff SW |
305 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
306 | capability, tsf, &chandef, | |
cd7760e6 | 307 | &have_higher_than_11mbit, NULL); |
d51b70ff | 308 | if (!presp) |
c3ffeab4 JB |
309 | return; |
310 | ||
311 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 312 | mgmt = (void *)presp->head; |
46900298 | 313 | |
d6a83228 | 314 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 315 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 316 | sdata->vif.bss_conf.basic_rates = basic_rates; |
0ca54f6c MP |
317 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
318 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
319 | bss_change = BSS_CHANGED_BEACON_INT; |
320 | bss_change |= ieee80211_reset_erp_info(sdata); | |
321 | bss_change |= BSS_CHANGED_BSSID; | |
322 | bss_change |= BSS_CHANGED_BEACON; | |
323 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 324 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 325 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 326 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 327 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
328 | |
329 | /* | |
330 | * In 5 GHz/802.11a, we can always use short slot time. | |
331 | * (IEEE 802.11-2012 18.3.8.7) | |
332 | * | |
333 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
334 | * reasons. | |
335 | * (IEEE 802.11-2012 19.4.5) | |
336 | * | |
337 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
338 | */ | |
339 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; | |
340 | bss_change |= BSS_CHANGED_ERP_SLOT; | |
341 | ||
2ec9c1f6 SW |
342 | /* cf. IEEE 802.11 9.2.12 */ |
343 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) | |
344 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
345 | else | |
346 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
347 | ||
55fff501 JB |
348 | ieee80211_set_wmm_default(sdata, true); |
349 | ||
8fc214ba | 350 | sdata->vif.bss_conf.ibss_joined = true; |
c13a765b | 351 | sdata->vif.bss_conf.ibss_creator = creator; |
46900298 | 352 | |
55fff501 JB |
353 | err = drv_join_ibss(local, sdata); |
354 | if (err) { | |
355 | sdata->vif.bss_conf.ibss_joined = false; | |
356 | sdata->vif.bss_conf.ibss_creator = false; | |
357 | sdata->vif.bss_conf.enable_beacon = false; | |
358 | sdata->vif.bss_conf.ssid_len = 0; | |
359 | RCU_INIT_POINTER(ifibss->presp, NULL); | |
360 | kfree_rcu(presp, rcu_head); | |
34a3740d | 361 | mutex_lock(&local->mtx); |
55fff501 | 362 | ieee80211_vif_release_channel(sdata); |
34a3740d | 363 | mutex_unlock(&local->mtx); |
55fff501 JB |
364 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
365 | err); | |
366 | return; | |
367 | } | |
368 | ||
369 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 370 | |
46900298 | 371 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
372 | mod_timer(&ifibss->timer, |
373 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 374 | |
7ca15a0a SW |
375 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
376 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, | |
377 | scan_width, mgmt, | |
378 | presp->head_len, 0, GFP_KERNEL); | |
5b112d3d | 379 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 380 | netif_carrier_on(sdata->dev); |
fe94f3a4 | 381 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
46900298 JB |
382 | } |
383 | ||
af8cdcd8 JB |
384 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
385 | struct ieee80211_bss *bss) | |
46900298 | 386 | { |
0c1ad2ca JB |
387 | struct cfg80211_bss *cbss = |
388 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 389 | struct ieee80211_supported_band *sband; |
75a423f4 | 390 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
391 | u32 basic_rates; |
392 | int i, j; | |
0c1ad2ca | 393 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 394 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 395 | enum nl80211_channel_type chan_type; |
8cef2c9d | 396 | u64 tsf; |
2103dec1 SW |
397 | u32 rate_flags; |
398 | int shift; | |
57c4d7b4 | 399 | |
8d61ffa5 | 400 | sdata_assert_lock(sdata); |
7a17a33c | 401 | |
57c4d7b4 JB |
402 | if (beacon_int < 10) |
403 | beacon_int = 10; | |
404 | ||
75a423f4 SW |
405 | switch (sdata->u.ibss.chandef.width) { |
406 | case NL80211_CHAN_WIDTH_20_NOHT: | |
407 | case NL80211_CHAN_WIDTH_20: | |
408 | case NL80211_CHAN_WIDTH_40: | |
409 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
410 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
411 | break; | |
412 | case NL80211_CHAN_WIDTH_5: | |
413 | case NL80211_CHAN_WIDTH_10: | |
414 | cfg80211_chandef_create(&chandef, cbss->channel, | |
415 | NL80211_CHAN_WIDTH_20_NOHT); | |
416 | chandef.width = sdata->u.ibss.chandef.width; | |
417 | break; | |
418 | default: | |
419 | /* fall back to 20 MHz for unsupported modes */ | |
420 | cfg80211_chandef_create(&chandef, cbss->channel, | |
421 | NL80211_CHAN_WIDTH_20_NOHT); | |
422 | break; | |
423 | } | |
424 | ||
0c1ad2ca | 425 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
426 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
427 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
428 | |
429 | basic_rates = 0; | |
430 | ||
431 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 432 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
433 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
434 | ||
435 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
436 | int brate; |
437 | if ((rate_flags & sband->bitrates[j].flags) | |
438 | != rate_flags) | |
439 | continue; | |
440 | ||
441 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
442 | 5 * (1 << shift)); | |
443 | if (brate == rate) { | |
b59066a2 JB |
444 | if (is_basic) |
445 | basic_rates |= BIT(j); | |
446 | break; | |
447 | } | |
448 | } | |
449 | } | |
450 | ||
8cef2c9d JB |
451 | rcu_read_lock(); |
452 | ies = rcu_dereference(cbss->ies); | |
453 | tsf = ies->tsf; | |
454 | rcu_read_unlock(); | |
455 | ||
0c1ad2ca | 456 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 457 | beacon_int, |
75a423f4 | 458 | &chandef, |
b59066a2 | 459 | basic_rates, |
0c1ad2ca | 460 | cbss->capability, |
8cef2c9d | 461 | tsf, false); |
46900298 JB |
462 | } |
463 | ||
cd7760e6 SW |
464 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
465 | struct cfg80211_csa_settings *csa_settings) | |
466 | { | |
467 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
468 | struct beacon_data *presp, *old_presp; | |
469 | struct cfg80211_bss *cbss; | |
470 | const struct cfg80211_bss_ies *ies; | |
6eb18137 | 471 | u16 capability = 0; |
cd7760e6 SW |
472 | u64 tsf; |
473 | int ret = 0; | |
474 | ||
475 | sdata_assert_lock(sdata); | |
476 | ||
cd7760e6 | 477 | if (ifibss->privacy) |
6eb18137 | 478 | capability = WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
479 | |
480 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
481 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
482 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
483 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
484 | |
485 | if (WARN_ON(!cbss)) { | |
486 | ret = -EINVAL; | |
487 | goto out; | |
488 | } | |
489 | ||
490 | rcu_read_lock(); | |
491 | ies = rcu_dereference(cbss->ies); | |
492 | tsf = ies->tsf; | |
493 | rcu_read_unlock(); | |
494 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
495 | ||
496 | old_presp = rcu_dereference_protected(ifibss->presp, | |
497 | lockdep_is_held(&sdata->wdev.mtx)); | |
498 | ||
499 | presp = ieee80211_ibss_build_presp(sdata, | |
500 | sdata->vif.bss_conf.beacon_int, | |
501 | sdata->vif.bss_conf.basic_rates, | |
502 | capability, tsf, &ifibss->chandef, | |
503 | NULL, csa_settings); | |
504 | if (!presp) { | |
505 | ret = -ENOMEM; | |
506 | goto out; | |
507 | } | |
508 | ||
509 | rcu_assign_pointer(ifibss->presp, presp); | |
510 | if (old_presp) | |
511 | kfree_rcu(old_presp, rcu_head); | |
512 | ||
dddd586b | 513 | return BSS_CHANGED_BEACON; |
cd7760e6 SW |
514 | out: |
515 | return ret; | |
516 | } | |
517 | ||
518 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) | |
519 | { | |
520 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
521 | struct cfg80211_bss *cbss; | |
faf046e7 | 522 | int err, changed = 0; |
cd7760e6 | 523 | |
bafdc614 SW |
524 | sdata_assert_lock(sdata); |
525 | ||
cd7760e6 SW |
526 | /* update cfg80211 bss information with the new channel */ |
527 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
528 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
529 | ifibss->chandef.chan, | |
530 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
531 | ifibss->ssid_len, |
532 | IEEE80211_BSS_TYPE_IBSS, | |
533 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
534 | /* XXX: should not really modify cfg80211 data */ |
535 | if (cbss) { | |
33787fc4 | 536 | cbss->channel = sdata->csa_chandef.chan; |
cd7760e6 SW |
537 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
538 | } | |
539 | } | |
540 | ||
33787fc4 | 541 | ifibss->chandef = sdata->csa_chandef; |
cd7760e6 SW |
542 | |
543 | /* generate the beacon */ | |
544 | err = ieee80211_ibss_csa_beacon(sdata, NULL); | |
cd7760e6 SW |
545 | if (err < 0) |
546 | return err; | |
547 | ||
faf046e7 | 548 | changed |= err; |
dddd586b | 549 | |
faf046e7 | 550 | return changed; |
cd7760e6 SW |
551 | } |
552 | ||
553 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
554 | { | |
555 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
556 | ||
557 | cancel_work_sync(&ifibss->csa_connection_drop_work); | |
558 | } | |
559 | ||
52874a5e | 560 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
561 | __acquires(RCU) |
562 | { | |
563 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
564 | u8 addr[ETH_ALEN]; | |
565 | ||
566 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
567 | ||
bdcbd8e0 | 568 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 569 | |
83d5cc01 JB |
570 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
571 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
572 | /* authorize the station only if the network is not RSN protected. If |
573 | * not wait for the userspace to authorize it */ | |
574 | if (!sta->sdata->u.ibss.control_port) | |
575 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
576 | |
577 | rate_control_rate_init(sta); | |
578 | ||
579 | /* If it fails, maybe we raced another insertion? */ | |
580 | if (sta_info_insert_rcu(sta)) | |
581 | return sta_info_get(sdata, addr); | |
582 | return sta; | |
583 | } | |
584 | ||
585 | static struct sta_info * | |
52874a5e AQ |
586 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
587 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
588 | __acquires(RCU) |
589 | { | |
590 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
591 | struct ieee80211_local *local = sdata->local; | |
592 | struct sta_info *sta; | |
55de908a | 593 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 594 | struct ieee80211_supported_band *sband; |
74608aca | 595 | enum nl80211_bss_scan_width scan_width; |
55de908a | 596 | int band; |
8bf11d8d JB |
597 | |
598 | /* | |
599 | * XXX: Consider removing the least recently used entry and | |
600 | * allow new one to be added. | |
601 | */ | |
602 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 603 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 604 | sdata->name, addr); |
8bf11d8d JB |
605 | rcu_read_lock(); |
606 | return NULL; | |
607 | } | |
608 | ||
609 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
610 | rcu_read_lock(); | |
611 | return NULL; | |
612 | } | |
613 | ||
b203ca39 | 614 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
615 | rcu_read_lock(); |
616 | return NULL; | |
617 | } | |
618 | ||
55de908a JB |
619 | rcu_read_lock(); |
620 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
621 | if (WARN_ON_ONCE(!chanctx_conf)) | |
622 | return NULL; | |
4bf88530 | 623 | band = chanctx_conf->def.chan->band; |
74608aca | 624 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
625 | rcu_read_unlock(); |
626 | ||
8bf11d8d JB |
627 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
628 | if (!sta) { | |
629 | rcu_read_lock(); | |
630 | return NULL; | |
631 | } | |
632 | ||
633 | sta->last_rx = jiffies; | |
634 | ||
635 | /* make sure mandatory rates are always added */ | |
b422c6cd | 636 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 637 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 638 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 639 | |
52874a5e | 640 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
641 | } |
642 | ||
871a4180 SW |
643 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
644 | { | |
645 | struct ieee80211_local *local = sdata->local; | |
646 | int active = 0; | |
647 | struct sta_info *sta; | |
648 | ||
649 | sdata_assert_lock(sdata); | |
650 | ||
651 | rcu_read_lock(); | |
652 | ||
653 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
654 | if (sta->sdata == sdata && | |
655 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
656 | jiffies)) { | |
657 | active++; | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | rcu_read_unlock(); | |
663 | ||
664 | return active; | |
665 | } | |
666 | ||
667 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
668 | { | |
669 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
670 | struct ieee80211_local *local = sdata->local; | |
671 | struct cfg80211_bss *cbss; | |
672 | struct beacon_data *presp; | |
673 | struct sta_info *sta; | |
871a4180 | 674 | |
d4c80d9d | 675 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
676 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
677 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
678 | ifibss->ssid_len, |
679 | IEEE80211_BSS_TYPE_IBSS, | |
680 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
681 | |
682 | if (cbss) { | |
683 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
684 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
685 | } | |
686 | } | |
687 | ||
688 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
689 | ||
690 | sta_info_flush(sdata); | |
691 | ||
692 | spin_lock_bh(&ifibss->incomplete_lock); | |
693 | while (!list_empty(&ifibss->incomplete_stations)) { | |
694 | sta = list_first_entry(&ifibss->incomplete_stations, | |
695 | struct sta_info, list); | |
696 | list_del(&sta->list); | |
697 | spin_unlock_bh(&ifibss->incomplete_lock); | |
698 | ||
699 | sta_info_free(local, sta); | |
700 | spin_lock_bh(&ifibss->incomplete_lock); | |
701 | } | |
702 | spin_unlock_bh(&ifibss->incomplete_lock); | |
703 | ||
704 | netif_carrier_off(sdata->dev); | |
705 | ||
706 | sdata->vif.bss_conf.ibss_joined = false; | |
707 | sdata->vif.bss_conf.ibss_creator = false; | |
708 | sdata->vif.bss_conf.enable_beacon = false; | |
709 | sdata->vif.bss_conf.ssid_len = 0; | |
710 | ||
711 | /* remove beacon */ | |
712 | presp = rcu_dereference_protected(ifibss->presp, | |
713 | lockdep_is_held(&sdata->wdev.mtx)); | |
714 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); | |
715 | if (presp) | |
716 | kfree_rcu(presp, rcu_head); | |
717 | ||
718 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
719 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
720 | BSS_CHANGED_IBSS); | |
55fff501 | 721 | drv_leave_ibss(local, sdata); |
34a3740d | 722 | mutex_lock(&local->mtx); |
871a4180 | 723 | ieee80211_vif_release_channel(sdata); |
34a3740d | 724 | mutex_unlock(&local->mtx); |
871a4180 SW |
725 | } |
726 | ||
cd7760e6 SW |
727 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
728 | { | |
729 | struct ieee80211_sub_if_data *sdata = | |
730 | container_of(work, struct ieee80211_sub_if_data, | |
731 | u.ibss.csa_connection_drop_work); | |
732 | ||
6f07d216 LC |
733 | sdata_lock(sdata); |
734 | ||
cd7760e6 SW |
735 | ieee80211_ibss_disconnect(sdata); |
736 | synchronize_rcu(); | |
737 | skb_queue_purge(&sdata->skb_queue); | |
738 | ||
739 | /* trigger a scan to find another IBSS network to join */ | |
740 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
6f07d216 LC |
741 | |
742 | sdata_unlock(sdata); | |
cd7760e6 SW |
743 | } |
744 | ||
8e8d347d SW |
745 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
746 | { | |
747 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
748 | int err; | |
749 | ||
750 | /* if the current channel is a DFS channel, mark the channel as | |
751 | * unavailable. | |
752 | */ | |
753 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
754 | &ifibss->chandef, |
755 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
756 | if (err > 0) |
757 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
758 | GFP_ATOMIC); | |
759 | } | |
760 | ||
cd7760e6 SW |
761 | static bool |
762 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
763 | struct ieee802_11_elems *elems, | |
764 | bool beacon) | |
765 | { | |
766 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 767 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 768 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 769 | enum nl80211_channel_type ch_type; |
82a8e17d | 770 | int err; |
cd7760e6 | 771 | u32 sta_flags; |
cd7760e6 | 772 | |
dbd72850 MK |
773 | sdata_assert_lock(sdata); |
774 | ||
cd7760e6 SW |
775 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
776 | switch (ifibss->chandef.width) { | |
777 | case NL80211_CHAN_WIDTH_5: | |
778 | case NL80211_CHAN_WIDTH_10: | |
779 | case NL80211_CHAN_WIDTH_20_NOHT: | |
780 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
781 | /* fall through */ | |
782 | case NL80211_CHAN_WIDTH_20: | |
783 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
784 | break; | |
785 | default: | |
786 | break; | |
787 | } | |
788 | ||
789 | memset(¶ms, 0, sizeof(params)); | |
c0f17eb9 | 790 | memset(&csa_ie, 0, sizeof(csa_ie)); |
84469a45 | 791 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 792 | ifibss->chandef.chan->band, |
c0f17eb9 | 793 | sta_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
794 | /* can't switch to destination channel, fail */ |
795 | if (err < 0) | |
796 | goto disconnect; | |
797 | ||
798 | /* did not contain a CSA */ | |
799 | if (err) | |
800 | return false; | |
801 | ||
0834ae3c SW |
802 | /* channel switch is not supported, disconnect */ |
803 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
804 | goto disconnect; | |
805 | ||
c0f17eb9 CYY |
806 | params.count = csa_ie.count; |
807 | params.chandef = csa_ie.chandef; | |
808 | ||
cd7760e6 SW |
809 | switch (ifibss->chandef.width) { |
810 | case NL80211_CHAN_WIDTH_20_NOHT: | |
811 | case NL80211_CHAN_WIDTH_20: | |
812 | case NL80211_CHAN_WIDTH_40: | |
813 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
814 | * another mode has been announced. The mode is not adopted | |
815 | * within the beacon while doing CSA and we should therefore | |
816 | * keep the mode which we announce. | |
817 | */ | |
818 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
819 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
820 | ch_type); | |
821 | break; | |
822 | case NL80211_CHAN_WIDTH_5: | |
823 | case NL80211_CHAN_WIDTH_10: | |
824 | if (params.chandef.width != ifibss->chandef.width) { | |
825 | sdata_info(sdata, | |
826 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
827 | ifibss->bssid, | |
828 | params.chandef.chan->center_freq, | |
829 | params.chandef.width, | |
830 | params.chandef.center_freq1, | |
831 | params.chandef.center_freq2); | |
832 | goto disconnect; | |
833 | } | |
834 | break; | |
835 | default: | |
836 | /* should not happen, sta_flags should prevent VHT modes. */ | |
837 | WARN_ON(1); | |
838 | goto disconnect; | |
839 | } | |
840 | ||
174e0cd2 IP |
841 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
842 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
843 | sdata_info(sdata, |
844 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
845 | ifibss->bssid, | |
846 | params.chandef.chan->center_freq, | |
847 | params.chandef.width, | |
848 | params.chandef.center_freq1, | |
849 | params.chandef.center_freq2); | |
850 | goto disconnect; | |
851 | } | |
852 | ||
853 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
854 | ¶ms.chandef, |
855 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
856 | if (err < 0) |
857 | goto disconnect; | |
2beb6dab | 858 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 859 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 860 | goto disconnect; |
cd7760e6 SW |
861 | } |
862 | ||
2beb6dab LC |
863 | params.radar_required = err; |
864 | ||
82a8e17d LC |
865 | if (cfg80211_chandef_identical(¶ms.chandef, |
866 | &sdata->vif.bss_conf.chandef)) { | |
867 | ibss_dbg(sdata, | |
868 | "received csa with an identical chandef, ignoring\n"); | |
869 | return true; | |
cd7760e6 | 870 | } |
cd7760e6 SW |
871 | |
872 | /* all checks done, now perform the channel switch. */ | |
873 | ibss_dbg(sdata, | |
874 | "received channel switch announcement to go to channel %d MHz\n", | |
875 | params.chandef.chan->center_freq); | |
876 | ||
c0f17eb9 | 877 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 878 | |
82a8e17d LC |
879 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
880 | ¶ms)) | |
881 | goto disconnect; | |
cd7760e6 | 882 | |
8e8d347d SW |
883 | ieee80211_ibss_csa_mark_radar(sdata); |
884 | ||
cd7760e6 SW |
885 | return true; |
886 | disconnect: | |
887 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
888 | ieee80211_queue_work(&sdata->local->hw, | |
889 | &ifibss->csa_connection_drop_work); | |
890 | ||
8e8d347d SW |
891 | ieee80211_ibss_csa_mark_radar(sdata); |
892 | ||
cd7760e6 SW |
893 | return true; |
894 | } | |
895 | ||
896 | static void | |
897 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
898 | struct ieee80211_mgmt *mgmt, size_t len, | |
899 | struct ieee80211_rx_status *rx_status, | |
900 | struct ieee802_11_elems *elems) | |
901 | { | |
902 | int required_len; | |
903 | ||
904 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
905 | return; | |
906 | ||
907 | /* CSA is the only action we handle for now */ | |
908 | if (mgmt->u.action.u.measurement.action_code != | |
909 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
910 | return; | |
911 | ||
912 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
913 | sizeof(mgmt->u.action.u.chan_switch); | |
914 | if (len < required_len) | |
915 | return; | |
916 | ||
82a8e17d LC |
917 | if (!sdata->vif.csa_active) |
918 | ieee80211_ibss_process_chanswitch(sdata, elems, false); | |
cd7760e6 SW |
919 | } |
920 | ||
2cc59e78 AQ |
921 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
922 | struct ieee80211_mgmt *mgmt, | |
923 | size_t len) | |
924 | { | |
925 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
926 | ||
927 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
928 | return; | |
929 | ||
930 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", | |
931 | mgmt->sa, mgmt->da, mgmt->bssid, reason); | |
932 | sta_info_destroy_addr(sdata, mgmt->sa); | |
933 | } | |
934 | ||
6d810f10 AQ |
935 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
936 | struct ieee80211_mgmt *mgmt, | |
937 | size_t len) | |
938 | { | |
939 | u16 auth_alg, auth_transaction; | |
940 | ||
8d61ffa5 | 941 | sdata_assert_lock(sdata); |
6d810f10 AQ |
942 | |
943 | if (len < 24 + 6) | |
944 | return; | |
945 | ||
946 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
947 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
948 | ||
bdcbd8e0 JB |
949 | ibss_dbg(sdata, |
950 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", | |
951 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
952 | |
953 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
954 | return; | |
955 | ||
6d810f10 AQ |
956 | /* |
957 | * IEEE 802.11 standard does not require authentication in IBSS | |
958 | * networks and most implementations do not seem to use it. | |
959 | * However, try to reply to authentication attempts if someone | |
960 | * has actually implemented this. | |
961 | */ | |
700e8ea6 | 962 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 963 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
964 | } |
965 | ||
8a4988d1 JD |
966 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
967 | struct ieee80211_mgmt *mgmt, size_t len, | |
968 | struct ieee80211_rx_status *rx_status, | |
969 | struct ieee802_11_elems *elems, | |
970 | struct ieee80211_channel *channel) | |
46900298 | 971 | { |
46900298 | 972 | struct sta_info *sta; |
46900298 | 973 | enum ieee80211_band band = rx_status->band; |
74608aca | 974 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 975 | struct ieee80211_local *local = sdata->local; |
13c40c54 AS |
976 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
977 | bool rates_updated = false; | |
8a4988d1 | 978 | u32 supp_rates = 0; |
46900298 | 979 | |
8a4988d1 | 980 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
981 | return; |
982 | ||
8a4988d1 JD |
983 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
984 | return; | |
46900298 | 985 | |
8a4988d1 JD |
986 | rcu_read_lock(); |
987 | sta = sta_info_get(sdata, mgmt->sa); | |
988 | ||
989 | if (elems->supp_rates) { | |
990 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
991 | band, NULL); | |
992 | if (sta) { | |
993 | u32 prev_rates; | |
994 | ||
995 | prev_rates = sta->sta.supp_rates[band]; | |
996 | /* make sure mandatory rates are always added */ | |
997 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
998 | if (rx_status->flag & RX_FLAG_5MHZ) | |
999 | scan_width = NL80211_BSS_CHAN_WIDTH_5; | |
1000 | if (rx_status->flag & RX_FLAG_10MHZ) | |
1001 | scan_width = NL80211_BSS_CHAN_WIDTH_10; | |
1002 | ||
1003 | sta->sta.supp_rates[band] = supp_rates | | |
1004 | ieee80211_mandatory_rates(sband, scan_width); | |
1005 | if (sta->sta.supp_rates[band] != prev_rates) { | |
1006 | ibss_dbg(sdata, | |
1007 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1008 | sta->sta.addr, prev_rates, | |
1009 | sta->sta.supp_rates[band]); | |
1010 | rates_updated = true; | |
8bf11d8d | 1011 | } |
8a4988d1 JD |
1012 | } else { |
1013 | rcu_read_unlock(); | |
1014 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1015 | mgmt->sa, supp_rates); | |
34e89507 | 1016 | } |
8a4988d1 | 1017 | } |
9eba6125 | 1018 | |
527871d7 | 1019 | if (sta && elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) |
8a4988d1 | 1020 | sta->sta.wme = true; |
13c40c54 | 1021 | |
8a4988d1 JD |
1022 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1023 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1024 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1025 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1026 | /* we both use HT */ | |
1027 | struct ieee80211_ht_cap htcap_ie; | |
1028 | struct cfg80211_chan_def chandef; | |
d2954457 | 1029 | |
8a4988d1 JD |
1030 | ieee80211_ht_oper_to_chandef(channel, |
1031 | elems->ht_operation, | |
1032 | &chandef); | |
d2954457 | 1033 | |
8a4988d1 JD |
1034 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
1035 | ||
1036 | /* | |
1037 | * fall back to HT20 if we don't use or use | |
1038 | * the other extension channel | |
1039 | */ | |
1040 | if (chandef.center_freq1 != sdata->u.ibss.chandef.center_freq1) | |
1041 | htcap_ie.cap_info &= | |
1042 | cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
1043 | ||
1044 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, | |
1045 | &htcap_ie, | |
1046 | sta); | |
1047 | } | |
1048 | ||
1049 | if (sta && rates_updated) { | |
1050 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
1051 | u8 rx_nss = sta->sta.rx_nss; | |
1052 | ||
1053 | /* Force rx_nss recalculation */ | |
1054 | sta->sta.rx_nss = 0; | |
1055 | rate_control_rate_init(sta); | |
1056 | if (sta->sta.rx_nss != rx_nss) | |
1057 | changed |= IEEE80211_RC_NSS_CHANGED; | |
13c40c54 | 1058 | |
8a4988d1 | 1059 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1060 | } |
1061 | ||
8a4988d1 JD |
1062 | rcu_read_unlock(); |
1063 | } | |
1064 | ||
1065 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1066 | struct ieee80211_mgmt *mgmt, size_t len, | |
1067 | struct ieee80211_rx_status *rx_status, | |
1068 | struct ieee802_11_elems *elems) | |
1069 | { | |
1070 | struct ieee80211_local *local = sdata->local; | |
1071 | struct cfg80211_bss *cbss; | |
1072 | struct ieee80211_bss *bss; | |
1073 | struct ieee80211_channel *channel; | |
1074 | u64 beacon_timestamp, rx_timestamp; | |
1075 | u32 supp_rates = 0; | |
1076 | enum ieee80211_band band = rx_status->band; | |
1077 | ||
1078 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1079 | if (!channel) | |
1080 | return; | |
1081 | ||
1082 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1083 | ||
46900298 | 1084 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 1085 | channel); |
46900298 JB |
1086 | if (!bss) |
1087 | return; | |
1088 | ||
0c1ad2ca JB |
1089 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1090 | ||
8cef2c9d JB |
1091 | /* same for beacon and probe response */ |
1092 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1093 | |
1094 | /* check if we need to merge IBSS */ | |
1095 | ||
46900298 | 1096 | /* not an IBSS */ |
0c1ad2ca | 1097 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1098 | goto put_bss; |
1099 | ||
1100 | /* different channel */ | |
55de908a | 1101 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1102 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1103 | goto put_bss; |
1104 | ||
1105 | /* different SSID */ | |
1106 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1107 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1108 | sdata->u.ibss.ssid_len)) | |
1109 | goto put_bss; | |
1110 | ||
cd7760e6 | 1111 | /* process channel switch */ |
82a8e17d LC |
1112 | if (sdata->vif.csa_active || |
1113 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) | |
cd7760e6 SW |
1114 | goto put_bss; |
1115 | ||
34e8f082 | 1116 | /* same BSSID */ |
b203ca39 | 1117 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1118 | goto put_bss; |
1119 | ||
cd7760e6 SW |
1120 | /* we use a fixed BSSID */ |
1121 | if (sdata->u.ibss.fixed_bssid) | |
1122 | goto put_bss; | |
1123 | ||
f4bda337 TP |
1124 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1125 | /* time when timestamp field was received */ | |
1126 | rx_timestamp = | |
1127 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1128 | len + FCS_LEN, 24); | |
24487981 JB |
1129 | } else { |
1130 | /* | |
1131 | * second best option: get current TSF | |
1132 | * (will return -1 if not supported) | |
1133 | */ | |
37a41b4a | 1134 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1135 | } |
46900298 | 1136 | |
bdcbd8e0 JB |
1137 | ibss_dbg(sdata, |
1138 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1139 | mgmt->sa, mgmt->bssid, | |
1140 | (unsigned long long)rx_timestamp, | |
1141 | (unsigned long long)beacon_timestamp, | |
1142 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1143 | jiffies); | |
46900298 JB |
1144 | |
1145 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1146 | ibss_dbg(sdata, |
1147 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1148 | mgmt->bssid); | |
46900298 | 1149 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1150 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1151 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1152 | supp_rates); |
8bf11d8d | 1153 | rcu_read_unlock(); |
46900298 JB |
1154 | } |
1155 | ||
1156 | put_bss: | |
1157 | ieee80211_rx_bss_put(local, bss); | |
1158 | } | |
1159 | ||
8bf11d8d JB |
1160 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1161 | const u8 *bssid, const u8 *addr, | |
1162 | u32 supp_rates) | |
46900298 | 1163 | { |
2e10d330 | 1164 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1165 | struct ieee80211_local *local = sdata->local; |
1166 | struct sta_info *sta; | |
55de908a | 1167 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1168 | struct ieee80211_supported_band *sband; |
74608aca | 1169 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1170 | int band; |
46900298 | 1171 | |
af8cdcd8 JB |
1172 | /* |
1173 | * XXX: Consider removing the least recently used entry and | |
1174 | * allow new one to be added. | |
1175 | */ | |
46900298 | 1176 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1177 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1178 | sdata->name, addr); |
8bf11d8d | 1179 | return; |
46900298 JB |
1180 | } |
1181 | ||
2e10d330 | 1182 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1183 | return; |
2e10d330 | 1184 | |
b203ca39 | 1185 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1186 | return; |
46900298 | 1187 | |
55de908a JB |
1188 | rcu_read_lock(); |
1189 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1190 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
1191 | rcu_read_unlock(); | |
1192 | return; | |
1193 | } | |
4bf88530 | 1194 | band = chanctx_conf->def.chan->band; |
74608aca | 1195 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1196 | rcu_read_unlock(); |
1197 | ||
8bf11d8d | 1198 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1199 | if (!sta) |
8bf11d8d | 1200 | return; |
46900298 | 1201 | |
c8716d9d | 1202 | sta->last_rx = jiffies; |
d9a7ddb0 | 1203 | |
46900298 | 1204 | /* make sure mandatory rates are always added */ |
b422c6cd | 1205 | sband = local->hw.wiphy->bands[band]; |
46900298 | 1206 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 1207 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1208 | |
8bf11d8d JB |
1209 | spin_lock(&ifibss->incomplete_lock); |
1210 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1211 | spin_unlock(&ifibss->incomplete_lock); | |
1212 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
1213 | } |
1214 | ||
dad9defd AQ |
1215 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1216 | { | |
1217 | struct ieee80211_local *local = sdata->local; | |
1218 | struct sta_info *sta, *tmp; | |
1219 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
1220 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; | |
1221 | ||
1222 | mutex_lock(&local->sta_mtx); | |
1223 | ||
1224 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
1225 | if (sdata != sta->sdata) | |
1226 | continue; | |
1227 | ||
1228 | if (time_after(jiffies, sta->last_rx + exp_time) || | |
1229 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && | |
1230 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { | |
1231 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
1232 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1233 | "not authorized " : "", sta->sta.addr); | |
1234 | ||
1235 | WARN_ON(__sta_info_destroy(sta)); | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | mutex_unlock(&local->sta_mtx); | |
1240 | } | |
1241 | ||
ce9058ae BP |
1242 | /* |
1243 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1244 | */ | |
46900298 JB |
1245 | |
1246 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1247 | { | |
1248 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1249 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1250 | |
8d61ffa5 | 1251 | sdata_assert_lock(sdata); |
7a17a33c | 1252 | |
af8cdcd8 JB |
1253 | mod_timer(&ifibss->timer, |
1254 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1255 | |
dad9defd | 1256 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1257 | |
450aae3d S |
1258 | if (time_before(jiffies, ifibss->last_scan_completed + |
1259 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1260 | return; | |
1261 | ||
46900298 JB |
1262 | if (ieee80211_sta_active_ibss(sdata)) |
1263 | return; | |
1264 | ||
c037b836 | 1265 | if (ifibss->fixed_channel) |
46900298 JB |
1266 | return; |
1267 | ||
bdcbd8e0 JB |
1268 | sdata_info(sdata, |
1269 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1270 | |
7ca15a0a | 1271 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1272 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1273 | NULL, 0, scan_width); |
46900298 JB |
1274 | } |
1275 | ||
af8cdcd8 | 1276 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1277 | { |
1278 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1279 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1280 | u16 capability; |
1281 | int i; | |
1282 | ||
8d61ffa5 | 1283 | sdata_assert_lock(sdata); |
7a17a33c | 1284 | |
af8cdcd8 | 1285 | if (ifibss->fixed_bssid) { |
46900298 JB |
1286 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1287 | } else { | |
1288 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1289 | * own MAC address to make sure that devices that do not have proper | |
1290 | * random number generator get different BSSID. */ | |
1291 | get_random_bytes(bssid, ETH_ALEN); | |
1292 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1293 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1294 | bssid[0] &= ~0x01; |
1295 | bssid[0] |= 0x02; | |
1296 | } | |
1297 | ||
bdcbd8e0 | 1298 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1299 | |
46900298 JB |
1300 | capability = WLAN_CAPABILITY_IBSS; |
1301 | ||
fffd0934 | 1302 | if (ifibss->privacy) |
46900298 | 1303 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1304 | |
57c4d7b4 | 1305 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1306 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1307 | capability, 0, true); |
46900298 JB |
1308 | } |
1309 | ||
76bed0f4 JD |
1310 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
1311 | struct ieee80211_channel **channels, | |
1312 | unsigned int channels_max, | |
1313 | u32 center_freq, u32 width) | |
1314 | { | |
1315 | struct ieee80211_channel *chan = NULL; | |
1316 | unsigned int n_chan = 0; | |
1317 | u32 start_freq, end_freq, freq; | |
1318 | ||
1319 | if (width <= 20) { | |
1320 | start_freq = center_freq; | |
1321 | end_freq = center_freq; | |
1322 | } else { | |
1323 | start_freq = center_freq - width / 2 + 10; | |
1324 | end_freq = center_freq + width / 2 - 10; | |
1325 | } | |
1326 | ||
1327 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1328 | chan = ieee80211_get_channel(wiphy, freq); | |
1329 | if (!chan) | |
1330 | continue; | |
1331 | if (n_chan >= channels_max) | |
1332 | return n_chan; | |
1333 | ||
1334 | channels[n_chan] = chan; | |
1335 | n_chan++; | |
1336 | } | |
1337 | ||
1338 | return n_chan; | |
1339 | } | |
1340 | ||
1341 | static unsigned int | |
1342 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1343 | const struct cfg80211_chan_def *chandef, | |
1344 | struct ieee80211_channel **channels, | |
1345 | unsigned int channels_max) | |
1346 | { | |
1347 | unsigned int n_chan = 0; | |
1348 | u32 width, cf1, cf2 = 0; | |
1349 | ||
1350 | switch (chandef->width) { | |
1351 | case NL80211_CHAN_WIDTH_40: | |
1352 | width = 40; | |
1353 | break; | |
1354 | case NL80211_CHAN_WIDTH_80P80: | |
1355 | cf2 = chandef->center_freq2; | |
1356 | /* fall through */ | |
1357 | case NL80211_CHAN_WIDTH_80: | |
1358 | width = 80; | |
1359 | break; | |
1360 | case NL80211_CHAN_WIDTH_160: | |
1361 | width = 160; | |
1362 | break; | |
1363 | default: | |
1364 | width = 20; | |
1365 | break; | |
1366 | } | |
1367 | ||
1368 | cf1 = chandef->center_freq1; | |
1369 | ||
1370 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1371 | ||
1372 | if (cf2) | |
1373 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1374 | channels_max - n_chan, cf2, | |
1375 | width); | |
1376 | ||
1377 | return n_chan; | |
1378 | } | |
1379 | ||
ce9058ae BP |
1380 | /* |
1381 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1382 | */ | |
1383 | ||
af8cdcd8 | 1384 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1385 | { |
1386 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1387 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1388 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1389 | struct ieee80211_channel *chan = NULL; |
46900298 | 1390 | const u8 *bssid = NULL; |
7ca15a0a | 1391 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1392 | int active_ibss; |
1393 | ||
8d61ffa5 | 1394 | sdata_assert_lock(sdata); |
7a17a33c | 1395 | |
46900298 | 1396 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1397 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1398 | |
1399 | if (active_ibss) | |
af8cdcd8 | 1400 | return; |
46900298 | 1401 | |
af8cdcd8 JB |
1402 | if (ifibss->fixed_bssid) |
1403 | bssid = ifibss->bssid; | |
1404 | if (ifibss->fixed_channel) | |
3aede78a | 1405 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1406 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1407 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1408 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1409 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1410 | IEEE80211_BSS_TYPE_IBSS, |
1411 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1412 | |
1413 | if (cbss) { | |
1414 | struct ieee80211_bss *bss; | |
46900298 | 1415 | |
0c1ad2ca | 1416 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1417 | ibss_dbg(sdata, |
1418 | "sta_find_ibss: selected %pM current %pM\n", | |
1419 | cbss->bssid, ifibss->bssid); | |
1420 | sdata_info(sdata, | |
1421 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1422 | cbss->bssid); | |
46900298 | 1423 | |
af8cdcd8 | 1424 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1425 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1426 | return; |
d419b9f0 | 1427 | } |
46900298 | 1428 | |
d8eb741e AQ |
1429 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1430 | * directly and do not waste time scanning | |
1431 | */ | |
1432 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1433 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1434 | bssid); | |
1435 | ieee80211_sta_create_ibss(sdata); | |
1436 | return; | |
1437 | } | |
1438 | ||
1439 | ||
bdcbd8e0 | 1440 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1441 | |
1442 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1443 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1444 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1445 | struct ieee80211_channel *channels[8]; |
1446 | unsigned int num; | |
1447 | ||
bdcbd8e0 | 1448 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1449 | |
76bed0f4 JD |
1450 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, |
1451 | &ifibss->chandef, | |
1452 | channels, | |
1453 | ARRAY_SIZE(channels)); | |
7ca15a0a | 1454 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1455 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
76bed0f4 | 1456 | ifibss->ssid_len, channels, num, |
7ca15a0a | 1457 | scan_width); |
ce9058ae | 1458 | } else { |
46900298 JB |
1459 | int interval = IEEE80211_SCAN_INTERVAL; |
1460 | ||
1461 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1462 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1463 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1464 | |
af8cdcd8 JB |
1465 | mod_timer(&ifibss->timer, |
1466 | round_jiffies(jiffies + interval)); | |
46900298 | 1467 | } |
46900298 JB |
1468 | } |
1469 | ||
1470 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1471 | struct sk_buff *req) |
46900298 | 1472 | { |
c269a203 | 1473 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1474 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1475 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1476 | int tx_last_beacon, len = req->len; |
46900298 | 1477 | struct sk_buff *skb; |
c3ffeab4 | 1478 | struct beacon_data *presp; |
46900298 JB |
1479 | u8 *pos, *end; |
1480 | ||
8d61ffa5 | 1481 | sdata_assert_lock(sdata); |
7a17a33c | 1482 | |
40b275b6 | 1483 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1484 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1485 | |
46900298 | 1486 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1487 | len < 24 + 2 || !presp) |
46900298 JB |
1488 | return; |
1489 | ||
24487981 | 1490 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1491 | |
bdcbd8e0 JB |
1492 | ibss_dbg(sdata, |
1493 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", | |
1494 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); | |
46900298 | 1495 | |
1ed76487 | 1496 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1497 | return; |
1498 | ||
b203ca39 | 1499 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1500 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1501 | return; |
1502 | ||
1503 | end = ((u8 *) mgmt) + len; | |
1504 | pos = mgmt->u.probe_req.variable; | |
1505 | if (pos[0] != WLAN_EID_SSID || | |
1506 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1507 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1508 | mgmt->sa); | |
46900298 JB |
1509 | return; |
1510 | } | |
1511 | if (pos[1] != 0 && | |
1512 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1513 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1514 | /* Ignore ProbeReq for foreign SSID */ |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1519 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1520 | if (!skb) |
1521 | return; | |
1522 | ||
c3ffeab4 JB |
1523 | skb_reserve(skb, local->tx_headroom); |
1524 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); | |
1525 | ||
1526 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1527 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1528 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1529 | |
1530 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1531 | if (pos[1] == 0) | |
1532 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1533 | ||
62ae67be | 1534 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1535 | } |
1536 | ||
d45c4172 EG |
1537 | static |
1538 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1539 | struct ieee80211_mgmt *mgmt, size_t len, | |
1540 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1541 | { |
1542 | size_t baselen; | |
1543 | struct ieee802_11_elems elems; | |
1544 | ||
d45c4172 EG |
1545 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1546 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1547 | ||
1548 | /* | |
1549 | * either beacon or probe_resp but the variable field is at the | |
1550 | * same offset | |
1551 | */ | |
46900298 JB |
1552 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1553 | if (baselen > len) | |
1554 | return; | |
1555 | ||
1556 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1557 | false, &elems); |
46900298 | 1558 | |
d45c4172 | 1559 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1560 | } |
1561 | ||
1fa57d01 JB |
1562 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1563 | struct sk_buff *skb) | |
46900298 JB |
1564 | { |
1565 | struct ieee80211_rx_status *rx_status; | |
1566 | struct ieee80211_mgmt *mgmt; | |
1567 | u16 fc; | |
cd7760e6 SW |
1568 | struct ieee802_11_elems elems; |
1569 | int ies_len; | |
46900298 | 1570 | |
f1d58c25 | 1571 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1572 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1573 | fc = le16_to_cpu(mgmt->frame_control); | |
1574 | ||
8d61ffa5 | 1575 | sdata_lock(sdata); |
7a17a33c | 1576 | |
c926d006 TH |
1577 | if (!sdata->u.ibss.ssid_len) |
1578 | goto mgmt_out; /* not ready to merge yet */ | |
1579 | ||
46900298 JB |
1580 | switch (fc & IEEE80211_FCTL_STYPE) { |
1581 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1582 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1583 | break; |
1584 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1585 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1586 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1587 | rx_status); | |
46900298 JB |
1588 | break; |
1589 | case IEEE80211_STYPE_AUTH: | |
1590 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1591 | break; | |
2cc59e78 AQ |
1592 | case IEEE80211_STYPE_DEAUTH: |
1593 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1594 | break; | |
cd7760e6 SW |
1595 | case IEEE80211_STYPE_ACTION: |
1596 | switch (mgmt->u.action.category) { | |
1597 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1598 | ies_len = skb->len - | |
1599 | offsetof(struct ieee80211_mgmt, | |
1600 | u.action.u.chan_switch.variable); | |
1601 | ||
1602 | if (ies_len < 0) | |
1603 | break; | |
1604 | ||
1605 | ieee802_11_parse_elems( | |
1606 | mgmt->u.action.u.chan_switch.variable, | |
1607 | ies_len, true, &elems); | |
1608 | ||
1609 | if (elems.parse_error) | |
1610 | break; | |
1611 | ||
1612 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, | |
1613 | rx_status, &elems); | |
1614 | break; | |
1615 | } | |
46900298 | 1616 | } |
7a17a33c | 1617 | |
c926d006 | 1618 | mgmt_out: |
8d61ffa5 | 1619 | sdata_unlock(sdata); |
46900298 JB |
1620 | } |
1621 | ||
1fa57d01 | 1622 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1623 | { |
1fa57d01 | 1624 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1625 | struct sta_info *sta; |
46900298 | 1626 | |
8d61ffa5 | 1627 | sdata_lock(sdata); |
7a17a33c JB |
1628 | |
1629 | /* | |
1630 | * Work could be scheduled after scan or similar | |
1631 | * when we aren't even joined (or trying) with a | |
1632 | * network. | |
1633 | */ | |
1634 | if (!ifibss->ssid_len) | |
1635 | goto out; | |
46900298 | 1636 | |
8bf11d8d JB |
1637 | spin_lock_bh(&ifibss->incomplete_lock); |
1638 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1639 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1640 | struct sta_info, list); | |
1641 | list_del(&sta->list); | |
1642 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1643 | ||
52874a5e | 1644 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1645 | rcu_read_unlock(); |
1646 | spin_lock_bh(&ifibss->incomplete_lock); | |
1647 | } | |
1648 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1649 | ||
46900298 JB |
1650 | switch (ifibss->state) { |
1651 | case IEEE80211_IBSS_MLME_SEARCH: | |
1652 | ieee80211_sta_find_ibss(sdata); | |
1653 | break; | |
1654 | case IEEE80211_IBSS_MLME_JOINED: | |
1655 | ieee80211_sta_merge_ibss(sdata); | |
1656 | break; | |
1657 | default: | |
1658 | WARN_ON(1); | |
1659 | break; | |
1660 | } | |
46900298 | 1661 | |
7a17a33c | 1662 | out: |
8d61ffa5 | 1663 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1664 | } |
1665 | ||
46900298 JB |
1666 | static void ieee80211_ibss_timer(unsigned long data) |
1667 | { | |
1668 | struct ieee80211_sub_if_data *sdata = | |
1669 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 1670 | |
a6182943 | 1671 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1672 | } |
5bb644a0 | 1673 | |
46900298 JB |
1674 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1675 | { | |
1676 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1677 | ||
46900298 JB |
1678 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
1679 | (unsigned long) sdata); | |
8bf11d8d JB |
1680 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1681 | spin_lock_init(&ifibss->incomplete_lock); | |
cd7760e6 SW |
1682 | INIT_WORK(&ifibss->csa_connection_drop_work, |
1683 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1684 | } |
1685 | ||
1686 | /* scan finished notification */ | |
1687 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1688 | { | |
af8cdcd8 | 1689 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1690 | |
29b4a4f7 JB |
1691 | mutex_lock(&local->iflist_mtx); |
1692 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1693 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1694 | continue; |
af8cdcd8 JB |
1695 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1696 | continue; | |
1697 | sdata->u.ibss.last_scan_completed = jiffies; | |
7a17a33c | 1698 | ieee80211_queue_work(&local->hw, &sdata->work); |
46900298 | 1699 | } |
29b4a4f7 | 1700 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1701 | } |
1702 | ||
af8cdcd8 JB |
1703 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1704 | struct cfg80211_ibss_params *params) | |
1705 | { | |
ff3cc5f4 | 1706 | u32 changed = 0; |
2103dec1 SW |
1707 | u32 rate_flags; |
1708 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1709 | enum ieee80211_chanctx_mode chanmode; |
1710 | struct ieee80211_local *local = sdata->local; | |
1711 | int radar_detect_width = 0; | |
2103dec1 | 1712 | int i; |
71965c1d LC |
1713 | int ret; |
1714 | ||
1715 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1716 | ¶ms->chandef, | |
1717 | sdata->wdev.iftype); | |
1718 | if (ret < 0) | |
1719 | return ret; | |
1720 | ||
1721 | if (ret > 0) { | |
1722 | if (!params->userspace_handles_dfs) | |
1723 | return -EINVAL; | |
1724 | radar_detect_width = BIT(params->chandef.width); | |
1725 | } | |
1726 | ||
1727 | chanmode = (params->channel_fixed && !ret) ? | |
1728 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1729 | ||
1730 | mutex_lock(&local->chanctx_mtx); | |
1731 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1732 | radar_detect_width); | |
1733 | mutex_unlock(&local->chanctx_mtx); | |
1734 | if (ret < 0) | |
1735 | return ret; | |
af8cdcd8 | 1736 | |
af8cdcd8 JB |
1737 | if (params->bssid) { |
1738 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1739 | sdata->u.ibss.fixed_bssid = true; | |
1740 | } else | |
1741 | sdata->u.ibss.fixed_bssid = false; | |
1742 | ||
fffd0934 | 1743 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1744 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1745 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1746 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1747 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1748 | |
1749 | /* fix basic_rates if channel does not support these rates */ | |
1750 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1751 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1752 | for (i = 0; i < sband->n_bitrates; i++) { |
1753 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1754 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1755 | } | |
dd5b4cc7 FF |
1756 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1757 | sizeof(params->mcast_rate)); | |
fffd0934 | 1758 | |
57c4d7b4 JB |
1759 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1760 | ||
3aede78a | 1761 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1762 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1763 | ||
1764 | if (params->ie) { | |
1765 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1766 | GFP_KERNEL); | |
1767 | if (sdata->u.ibss.ie) | |
1768 | sdata->u.ibss.ie_len = params->ie_len; | |
1769 | } | |
1770 | ||
af8cdcd8 JB |
1771 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1772 | sdata->u.ibss.ibss_join_req = jiffies; | |
1773 | ||
badecb00 | 1774 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1775 | sdata->u.ibss.ssid_len = params->ssid_len; |
1776 | ||
822854b0 SW |
1777 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1778 | sizeof(sdata->u.ibss.ht_capa)); | |
1779 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1780 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1781 | ||
ff3cc5f4 SW |
1782 | /* |
1783 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1784 | * reserved, but an HT STA shall protect HT transmissions as though | |
1785 | * the HT Protection field were set to non-HT mixed mode. | |
1786 | * | |
1787 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1788 | * also reserved, but an HT STA shall operate as though this field | |
1789 | * were set to 1. | |
1790 | */ | |
1791 | ||
1792 | sdata->vif.bss_conf.ht_operation_mode |= | |
1793 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1794 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1795 | ||
1796 | changed |= BSS_CHANGED_HT; | |
1797 | ieee80211_bss_info_change_notify(sdata, changed); | |
1798 | ||
04ecd257 | 1799 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
71965c1d | 1800 | sdata->needed_rx_chains = local->rx_chains; |
04ecd257 | 1801 | |
71965c1d | 1802 | ieee80211_queue_work(&local->hw, &sdata->work); |
af8cdcd8 JB |
1803 | |
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1808 | { | |
5ea096c0 | 1809 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1810 | |
871a4180 | 1811 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1812 | ifibss->ssid_len = 0; |
871a4180 | 1813 | memset(ifibss->bssid, 0, ETH_ALEN); |
af8cdcd8 JB |
1814 | |
1815 | /* remove beacon */ | |
1816 | kfree(sdata->u.ibss.ie); | |
822854b0 SW |
1817 | |
1818 | /* on the next join, re-program HT parameters */ | |
1819 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1820 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1821 | ||
af8cdcd8 | 1822 | synchronize_rcu(); |
af8cdcd8 | 1823 | |
35f20c14 | 1824 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1825 | |
bc05d19f | 1826 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1827 | |
af8cdcd8 JB |
1828 | return 0; |
1829 | } |