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> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
46900298 JB |
17 | #include <linux/if_ether.h> |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/if_arp.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <net/mac80211.h> | |
46900298 JB |
23 | |
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
46900298 JB |
26 | #include "rate.h" |
27 | ||
28 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
46900298 JB |
29 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
30 | ||
31 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
32 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
dad9defd | 33 | #define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ) |
46900298 JB |
34 | |
35 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
36 | ||
d51b70ff SW |
37 | static struct beacon_data * |
38 | ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, | |
39 | const int beacon_int, const u32 basic_rates, | |
40 | const u16 capability, u64 tsf, | |
41 | struct cfg80211_chan_def *chandef, | |
42 | bool *have_higher_than_11mbit) | |
46900298 JB |
43 | { |
44 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
45 | struct ieee80211_local *local = sdata->local; | |
2103dec1 | 46 | int rates_n = 0, i, ri; |
46900298 JB |
47 | struct ieee80211_mgmt *mgmt; |
48 | u8 *pos; | |
49 | struct ieee80211_supported_band *sband; | |
d51b70ff | 50 | u32 rate_flags, rates = 0, rates_added = 0; |
c3ffeab4 JB |
51 | struct beacon_data *presp; |
52 | int frame_len; | |
2103dec1 | 53 | int shift; |
24487981 | 54 | |
46900298 | 55 | /* Build IBSS probe response */ |
c3ffeab4 JB |
56 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
57 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
58 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
59 | 2 + 8 /* max Supported Rates */ + | |
60 | 3 /* max DS params */ + | |
61 | 4 /* IBSS params */ + | |
62 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
63 | 2 + sizeof(struct ieee80211_ht_cap) + | |
64 | 2 + sizeof(struct ieee80211_ht_operation) + | |
65 | ifibss->ie_len; | |
66 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); | |
67 | if (!presp) | |
d51b70ff | 68 | return NULL; |
c3ffeab4 JB |
69 | |
70 | presp->head = (void *)(presp + 1); | |
71 | ||
72 | mgmt = (void *) presp->head; | |
46900298 JB |
73 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
74 | IEEE80211_STYPE_PROBE_RESP); | |
e83e6541 | 75 | eth_broadcast_addr(mgmt->da); |
47846c9b | 76 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 77 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 78 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 79 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
80 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
81 | ||
c3ffeab4 JB |
82 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
83 | ||
46900298 JB |
84 | *pos++ = WLAN_EID_SSID; |
85 | *pos++ = ifibss->ssid_len; | |
86 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
c3ffeab4 | 87 | pos += ifibss->ssid_len; |
46900298 | 88 | |
d51b70ff SW |
89 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
90 | rate_flags = ieee80211_chandef_rate_flags(chandef); | |
91 | shift = ieee80211_chandef_get_shift(chandef); | |
92 | rates_n = 0; | |
93 | if (have_higher_than_11mbit) | |
94 | *have_higher_than_11mbit = false; | |
95 | ||
2103dec1 SW |
96 | for (i = 0; i < sband->n_bitrates; i++) { |
97 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
98 | continue; | |
d51b70ff SW |
99 | if (sband->bitrates[i].bitrate > 110 && |
100 | have_higher_than_11mbit) | |
101 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
102 | |
103 | rates |= BIT(i); | |
104 | rates_n++; | |
105 | } | |
106 | ||
46900298 | 107 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
108 | *pos++ = min_t(int, 8, rates_n); |
109 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
110 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
111 | 5 * (1 << shift)); | |
c3ffeab4 | 112 | u8 basic = 0; |
2103dec1 SW |
113 | if (!(rates & BIT(ri))) |
114 | continue; | |
115 | ||
116 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 117 | basic = 0x80; |
2103dec1 | 118 | *pos++ = basic | (u8) rate; |
93c75786 SW |
119 | if (++rates_added == 8) { |
120 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 121 | break; |
93c75786 | 122 | } |
c3ffeab4 | 123 | } |
46900298 JB |
124 | |
125 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
46900298 JB |
126 | *pos++ = WLAN_EID_DS_PARAMS; |
127 | *pos++ = 1; | |
d51b70ff SW |
128 | *pos++ = ieee80211_frequency_to_channel( |
129 | chandef->chan->center_freq); | |
46900298 JB |
130 | } |
131 | ||
46900298 JB |
132 | *pos++ = WLAN_EID_IBSS_PARAMS; |
133 | *pos++ = 2; | |
134 | /* FIX: set ATIM window based on scan results */ | |
135 | *pos++ = 0; | |
136 | *pos++ = 0; | |
137 | ||
2103dec1 SW |
138 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
139 | if (rates_n > 8) { | |
46900298 | 140 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
141 | *pos++ = rates_n - 8; |
142 | for (; ri < sband->n_bitrates; ri++) { | |
143 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
144 | 5 * (1 << shift)); | |
c3ffeab4 | 145 | u8 basic = 0; |
2103dec1 SW |
146 | if (!(rates & BIT(ri))) |
147 | continue; | |
148 | ||
149 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 150 | basic = 0x80; |
2103dec1 | 151 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 152 | } |
46900298 JB |
153 | } |
154 | ||
c3ffeab4 JB |
155 | if (ifibss->ie_len) { |
156 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
157 | pos += ifibss->ie_len; | |
158 | } | |
af8cdcd8 | 159 | |
13c40c54 | 160 | /* add HT capability and information IEs */ |
d51b70ff SW |
161 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
162 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
163 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 164 | sband->ht_cap.ht_supported) { |
822854b0 SW |
165 | struct ieee80211_sta_ht_cap ht_cap; |
166 | ||
167 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
168 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
169 | ||
170 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
171 | /* |
172 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
173 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
174 | * keep them at 0 | |
175 | */ | |
074d46d1 | 176 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
d51b70ff | 177 | chandef, 0); |
13c40c54 AS |
178 | } |
179 | ||
32c5057b | 180 | if (local->hw.queues >= IEEE80211_NUM_ACS) { |
9eba6125 BR |
181 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
182 | *pos++ = 7; /* len */ | |
183 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
184 | *pos++ = 0x50; | |
185 | *pos++ = 0xf2; | |
186 | *pos++ = 2; /* WME */ | |
187 | *pos++ = 0; /* WME info */ | |
188 | *pos++ = 1; /* WME ver */ | |
189 | *pos++ = 0; /* U-APSD no in use */ | |
190 | } | |
191 | ||
c3ffeab4 JB |
192 | presp->head_len = pos - presp->head; |
193 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
194 | goto error; |
195 | ||
196 | return presp; | |
197 | error: | |
198 | kfree(presp); | |
199 | return NULL; | |
200 | } | |
201 | ||
202 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
203 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 204 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
205 | const u32 basic_rates, |
206 | const u16 capability, u64 tsf, | |
207 | bool creator) | |
208 | { | |
209 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
210 | struct ieee80211_local *local = sdata->local; | |
211 | struct ieee80211_supported_band *sband; | |
212 | struct ieee80211_mgmt *mgmt; | |
213 | struct cfg80211_bss *bss; | |
214 | u32 bss_change; | |
215 | struct cfg80211_chan_def chandef; | |
b35c8097 | 216 | struct ieee80211_channel *chan; |
d51b70ff SW |
217 | struct beacon_data *presp; |
218 | enum nl80211_bss_scan_width scan_width; | |
219 | bool have_higher_than_11mbit; | |
220 | ||
221 | sdata_assert_lock(sdata); | |
222 | ||
223 | /* Reset own TSF to allow time synchronization work. */ | |
224 | drv_reset_tsf(local, sdata); | |
225 | ||
226 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
227 | sta_info_flush(sdata); | |
228 | ||
229 | /* if merging, indicate to driver that we leave the old IBSS */ | |
230 | if (sdata->vif.bss_conf.ibss_joined) { | |
231 | sdata->vif.bss_conf.ibss_joined = false; | |
232 | sdata->vif.bss_conf.ibss_creator = false; | |
233 | sdata->vif.bss_conf.enable_beacon = false; | |
234 | netif_carrier_off(sdata->dev); | |
235 | ieee80211_bss_info_change_notify(sdata, | |
236 | BSS_CHANGED_IBSS | | |
237 | BSS_CHANGED_BEACON_ENABLED); | |
238 | } | |
239 | ||
240 | presp = rcu_dereference_protected(ifibss->presp, | |
241 | lockdep_is_held(&sdata->wdev.mtx)); | |
242 | rcu_assign_pointer(ifibss->presp, NULL); | |
243 | if (presp) | |
244 | kfree_rcu(presp, rcu_head); | |
245 | ||
246 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
247 | ||
b35c8097 JL |
248 | /* make a copy of the chandef, it could be modified below. */ |
249 | chandef = *req_chandef; | |
250 | chan = chandef.chan; | |
d51b70ff SW |
251 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { |
252 | if (chandef.width == NL80211_CHAN_WIDTH_5 || | |
253 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
254 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
255 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
256 | sdata_info(sdata, | |
257 | "Failed to join IBSS, beacons forbidden\n"); | |
258 | return; | |
259 | } | |
260 | chandef.width = NL80211_CHAN_WIDTH_20; | |
261 | chandef.center_freq1 = chan->center_freq; | |
262 | } | |
263 | ||
264 | ieee80211_vif_release_channel(sdata); | |
265 | if (ieee80211_vif_use_channel(sdata, &chandef, | |
266 | ifibss->fixed_channel ? | |
267 | IEEE80211_CHANCTX_SHARED : | |
268 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
269 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
270 | return; | |
271 | } | |
272 | ||
273 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
274 | ||
275 | sband = local->hw.wiphy->bands[chan->band]; | |
276 | ||
277 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, | |
278 | capability, tsf, &chandef, | |
279 | &have_higher_than_11mbit); | |
280 | if (!presp) | |
c3ffeab4 JB |
281 | return; |
282 | ||
283 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 284 | mgmt = (void *)presp->head; |
46900298 | 285 | |
d6a83228 | 286 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 287 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 288 | sdata->vif.bss_conf.basic_rates = basic_rates; |
0ca54f6c MP |
289 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
290 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
291 | bss_change = BSS_CHANGED_BEACON_INT; |
292 | bss_change |= ieee80211_reset_erp_info(sdata); | |
293 | bss_change |= BSS_CHANGED_BSSID; | |
294 | bss_change |= BSS_CHANGED_BEACON; | |
295 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 296 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 297 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 298 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 299 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
300 | |
301 | /* | |
302 | * In 5 GHz/802.11a, we can always use short slot time. | |
303 | * (IEEE 802.11-2012 18.3.8.7) | |
304 | * | |
305 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
306 | * reasons. | |
307 | * (IEEE 802.11-2012 19.4.5) | |
308 | * | |
309 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
310 | */ | |
311 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; | |
312 | bss_change |= BSS_CHANGED_ERP_SLOT; | |
313 | ||
2ec9c1f6 SW |
314 | /* cf. IEEE 802.11 9.2.12 */ |
315 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) | |
316 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
317 | else | |
318 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
319 | ||
8fc214ba | 320 | sdata->vif.bss_conf.ibss_joined = true; |
c13a765b | 321 | sdata->vif.bss_conf.ibss_creator = creator; |
2d0ddec5 | 322 | ieee80211_bss_info_change_notify(sdata, bss_change); |
46900298 | 323 | |
2ec9c1f6 | 324 | ieee80211_set_wmm_default(sdata, true); |
46900298 | 325 | |
46900298 | 326 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
327 | mod_timer(&ifibss->timer, |
328 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 329 | |
7ca15a0a SW |
330 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
331 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, | |
332 | scan_width, mgmt, | |
333 | presp->head_len, 0, GFP_KERNEL); | |
5b112d3d | 334 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 335 | netif_carrier_on(sdata->dev); |
af8cdcd8 | 336 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
46900298 JB |
337 | } |
338 | ||
af8cdcd8 JB |
339 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
340 | struct ieee80211_bss *bss) | |
46900298 | 341 | { |
0c1ad2ca JB |
342 | struct cfg80211_bss *cbss = |
343 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 344 | struct ieee80211_supported_band *sband; |
75a423f4 | 345 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
346 | u32 basic_rates; |
347 | int i, j; | |
0c1ad2ca | 348 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 349 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 350 | enum nl80211_channel_type chan_type; |
8cef2c9d | 351 | u64 tsf; |
2103dec1 SW |
352 | u32 rate_flags; |
353 | int shift; | |
57c4d7b4 | 354 | |
8d61ffa5 | 355 | sdata_assert_lock(sdata); |
7a17a33c | 356 | |
57c4d7b4 JB |
357 | if (beacon_int < 10) |
358 | beacon_int = 10; | |
359 | ||
75a423f4 SW |
360 | switch (sdata->u.ibss.chandef.width) { |
361 | case NL80211_CHAN_WIDTH_20_NOHT: | |
362 | case NL80211_CHAN_WIDTH_20: | |
363 | case NL80211_CHAN_WIDTH_40: | |
364 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
365 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
366 | break; | |
367 | case NL80211_CHAN_WIDTH_5: | |
368 | case NL80211_CHAN_WIDTH_10: | |
369 | cfg80211_chandef_create(&chandef, cbss->channel, | |
370 | NL80211_CHAN_WIDTH_20_NOHT); | |
371 | chandef.width = sdata->u.ibss.chandef.width; | |
372 | break; | |
373 | default: | |
374 | /* fall back to 20 MHz for unsupported modes */ | |
375 | cfg80211_chandef_create(&chandef, cbss->channel, | |
376 | NL80211_CHAN_WIDTH_20_NOHT); | |
377 | break; | |
378 | } | |
379 | ||
0c1ad2ca | 380 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
381 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
382 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
383 | |
384 | basic_rates = 0; | |
385 | ||
386 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 387 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
388 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
389 | ||
390 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
391 | int brate; |
392 | if ((rate_flags & sband->bitrates[j].flags) | |
393 | != rate_flags) | |
394 | continue; | |
395 | ||
396 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
397 | 5 * (1 << shift)); | |
398 | if (brate == rate) { | |
b59066a2 JB |
399 | if (is_basic) |
400 | basic_rates |= BIT(j); | |
401 | break; | |
402 | } | |
403 | } | |
404 | } | |
405 | ||
8cef2c9d JB |
406 | rcu_read_lock(); |
407 | ies = rcu_dereference(cbss->ies); | |
408 | tsf = ies->tsf; | |
409 | rcu_read_unlock(); | |
410 | ||
0c1ad2ca | 411 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 412 | beacon_int, |
75a423f4 | 413 | &chandef, |
b59066a2 | 414 | basic_rates, |
0c1ad2ca | 415 | cbss->capability, |
8cef2c9d | 416 | tsf, false); |
46900298 JB |
417 | } |
418 | ||
52874a5e | 419 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
420 | __acquires(RCU) |
421 | { | |
422 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
423 | u8 addr[ETH_ALEN]; | |
424 | ||
425 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
426 | ||
bdcbd8e0 | 427 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 428 | |
83d5cc01 JB |
429 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
430 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
431 | /* authorize the station only if the network is not RSN protected. If |
432 | * not wait for the userspace to authorize it */ | |
433 | if (!sta->sdata->u.ibss.control_port) | |
434 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
435 | |
436 | rate_control_rate_init(sta); | |
437 | ||
438 | /* If it fails, maybe we raced another insertion? */ | |
439 | if (sta_info_insert_rcu(sta)) | |
440 | return sta_info_get(sdata, addr); | |
441 | return sta; | |
442 | } | |
443 | ||
444 | static struct sta_info * | |
52874a5e AQ |
445 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
446 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
447 | __acquires(RCU) |
448 | { | |
449 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
450 | struct ieee80211_local *local = sdata->local; | |
451 | struct sta_info *sta; | |
55de908a | 452 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 453 | struct ieee80211_supported_band *sband; |
74608aca | 454 | enum nl80211_bss_scan_width scan_width; |
55de908a | 455 | int band; |
8bf11d8d JB |
456 | |
457 | /* | |
458 | * XXX: Consider removing the least recently used entry and | |
459 | * allow new one to be added. | |
460 | */ | |
461 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 462 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 463 | sdata->name, addr); |
8bf11d8d JB |
464 | rcu_read_lock(); |
465 | return NULL; | |
466 | } | |
467 | ||
468 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
469 | rcu_read_lock(); | |
470 | return NULL; | |
471 | } | |
472 | ||
b203ca39 | 473 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
474 | rcu_read_lock(); |
475 | return NULL; | |
476 | } | |
477 | ||
55de908a JB |
478 | rcu_read_lock(); |
479 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
480 | if (WARN_ON_ONCE(!chanctx_conf)) | |
481 | return NULL; | |
4bf88530 | 482 | band = chanctx_conf->def.chan->band; |
74608aca | 483 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
484 | rcu_read_unlock(); |
485 | ||
8bf11d8d JB |
486 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
487 | if (!sta) { | |
488 | rcu_read_lock(); | |
489 | return NULL; | |
490 | } | |
491 | ||
492 | sta->last_rx = jiffies; | |
493 | ||
494 | /* make sure mandatory rates are always added */ | |
b422c6cd | 495 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 496 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 497 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 498 | |
52874a5e | 499 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
500 | } |
501 | ||
2cc59e78 AQ |
502 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
503 | struct ieee80211_mgmt *mgmt, | |
504 | size_t len) | |
505 | { | |
506 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
507 | ||
508 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
509 | return; | |
510 | ||
511 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", | |
512 | mgmt->sa, mgmt->da, mgmt->bssid, reason); | |
513 | sta_info_destroy_addr(sdata, mgmt->sa); | |
514 | } | |
515 | ||
6d810f10 AQ |
516 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
517 | struct ieee80211_mgmt *mgmt, | |
518 | size_t len) | |
519 | { | |
520 | u16 auth_alg, auth_transaction; | |
521 | ||
8d61ffa5 | 522 | sdata_assert_lock(sdata); |
6d810f10 AQ |
523 | |
524 | if (len < 24 + 6) | |
525 | return; | |
526 | ||
527 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
528 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
529 | ||
bdcbd8e0 JB |
530 | ibss_dbg(sdata, |
531 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", | |
532 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
533 | |
534 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
535 | return; | |
536 | ||
6d810f10 AQ |
537 | /* |
538 | * IEEE 802.11 standard does not require authentication in IBSS | |
539 | * networks and most implementations do not seem to use it. | |
540 | * However, try to reply to authentication attempts if someone | |
541 | * has actually implemented this. | |
542 | */ | |
700e8ea6 | 543 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 544 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
545 | } |
546 | ||
46900298 | 547 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
d45c4172 | 548 | struct ieee80211_mgmt *mgmt, size_t len, |
46900298 | 549 | struct ieee80211_rx_status *rx_status, |
d45c4172 | 550 | struct ieee802_11_elems *elems) |
46900298 JB |
551 | { |
552 | struct ieee80211_local *local = sdata->local; | |
553 | int freq; | |
0c1ad2ca | 554 | struct cfg80211_bss *cbss; |
46900298 JB |
555 | struct ieee80211_bss *bss; |
556 | struct sta_info *sta; | |
557 | struct ieee80211_channel *channel; | |
558 | u64 beacon_timestamp, rx_timestamp; | |
559 | u32 supp_rates = 0; | |
560 | enum ieee80211_band band = rx_status->band; | |
74608aca | 561 | enum nl80211_bss_scan_width scan_width; |
13c40c54 AS |
562 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
563 | bool rates_updated = false; | |
46900298 | 564 | |
1cd8e88e | 565 | if (elems->ds_params) |
59eb21a6 BR |
566 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
567 | band); | |
46900298 JB |
568 | else |
569 | freq = rx_status->freq; | |
570 | ||
571 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
572 | ||
573 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
574 | return; | |
575 | ||
9eba6125 | 576 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
b203ca39 | 577 | ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { |
46900298 JB |
578 | |
579 | rcu_read_lock(); | |
abe60632 | 580 | sta = sta_info_get(sdata, mgmt->sa); |
46900298 | 581 | |
9eba6125 | 582 | if (elems->supp_rates) { |
2103dec1 | 583 | supp_rates = ieee80211_sta_get_rates(sdata, elems, |
9ebb61a2 | 584 | band, NULL); |
9eba6125 BR |
585 | if (sta) { |
586 | u32 prev_rates; | |
587 | ||
588 | prev_rates = sta->sta.supp_rates[band]; | |
589 | /* make sure mandatory rates are always added */ | |
74608aca SW |
590 | scan_width = NL80211_BSS_CHAN_WIDTH_20; |
591 | if (rx_status->flag & RX_FLAG_5MHZ) | |
592 | scan_width = NL80211_BSS_CHAN_WIDTH_5; | |
593 | if (rx_status->flag & RX_FLAG_10MHZ) | |
594 | scan_width = NL80211_BSS_CHAN_WIDTH_10; | |
46900298 | 595 | |
74608aca SW |
596 | sta->sta.supp_rates[band] = supp_rates | |
597 | ieee80211_mandatory_rates(sband, | |
598 | scan_width); | |
9eba6125 | 599 | if (sta->sta.supp_rates[band] != prev_rates) { |
bdcbd8e0 JB |
600 | ibss_dbg(sdata, |
601 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
602 | sta->sta.addr, prev_rates, | |
603 | sta->sta.supp_rates[band]); | |
13c40c54 | 604 | rates_updated = true; |
9eba6125 | 605 | } |
8bf11d8d JB |
606 | } else { |
607 | rcu_read_unlock(); | |
9eba6125 | 608 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
52874a5e | 609 | mgmt->sa, supp_rates); |
8bf11d8d | 610 | } |
34e89507 | 611 | } |
9eba6125 BR |
612 | |
613 | if (sta && elems->wmm_info) | |
c2c98fde | 614 | set_sta_flag(sta, WLAN_STA_WME); |
9eba6125 | 615 | |
074d46d1 | 616 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
3aede78a SW |
617 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
618 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
619 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
13c40c54 | 620 | /* we both use HT */ |
e1a0c6b3 | 621 | struct ieee80211_ht_cap htcap_ie; |
4bf88530 JB |
622 | struct cfg80211_chan_def chandef; |
623 | ||
624 | ieee80211_ht_oper_to_chandef(channel, | |
625 | elems->ht_operation, | |
626 | &chandef); | |
13c40c54 | 627 | |
e1a0c6b3 | 628 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
13c40c54 AS |
629 | |
630 | /* | |
631 | * fall back to HT20 if we don't use or use | |
632 | * the other extension channel | |
633 | */ | |
3aede78a SW |
634 | if (chandef.center_freq1 != |
635 | sdata->u.ibss.chandef.center_freq1) | |
e1a0c6b3 JB |
636 | htcap_ie.cap_info &= |
637 | cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
638 | ||
639 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( | |
640 | sdata, sband, &htcap_ie, sta); | |
13c40c54 AS |
641 | } |
642 | ||
e687f61e AQ |
643 | if (sta && rates_updated) { |
644 | drv_sta_rc_update(local, sdata, &sta->sta, | |
645 | IEEE80211_RC_SUPP_RATES_CHANGED); | |
13c40c54 | 646 | rate_control_rate_init(sta); |
e687f61e | 647 | } |
13c40c54 | 648 | |
9eba6125 | 649 | rcu_read_unlock(); |
46900298 JB |
650 | } |
651 | ||
652 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
d45c4172 | 653 | channel); |
46900298 JB |
654 | if (!bss) |
655 | return; | |
656 | ||
0c1ad2ca JB |
657 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
658 | ||
8cef2c9d JB |
659 | /* same for beacon and probe response */ |
660 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
661 | |
662 | /* check if we need to merge IBSS */ | |
663 | ||
46900298 | 664 | /* we use a fixed BSSID */ |
a98bfec2 | 665 | if (sdata->u.ibss.fixed_bssid) |
46900298 JB |
666 | goto put_bss; |
667 | ||
668 | /* not an IBSS */ | |
0c1ad2ca | 669 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
670 | goto put_bss; |
671 | ||
672 | /* different channel */ | |
55de908a | 673 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 674 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
675 | goto put_bss; |
676 | ||
677 | /* different SSID */ | |
678 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
679 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
680 | sdata->u.ibss.ssid_len)) | |
681 | goto put_bss; | |
682 | ||
34e8f082 | 683 | /* same BSSID */ |
b203ca39 | 684 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
685 | goto put_bss; |
686 | ||
f4bda337 TP |
687 | if (ieee80211_have_rx_timestamp(rx_status)) { |
688 | /* time when timestamp field was received */ | |
689 | rx_timestamp = | |
690 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
691 | len + FCS_LEN, 24); | |
24487981 JB |
692 | } else { |
693 | /* | |
694 | * second best option: get current TSF | |
695 | * (will return -1 if not supported) | |
696 | */ | |
37a41b4a | 697 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 698 | } |
46900298 | 699 | |
bdcbd8e0 JB |
700 | ibss_dbg(sdata, |
701 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
702 | mgmt->sa, mgmt->bssid, | |
703 | (unsigned long long)rx_timestamp, | |
704 | (unsigned long long)beacon_timestamp, | |
705 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
706 | jiffies); | |
46900298 JB |
707 | |
708 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
709 | ibss_dbg(sdata, |
710 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
711 | mgmt->bssid); | |
46900298 | 712 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 713 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 714 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 715 | supp_rates); |
8bf11d8d | 716 | rcu_read_unlock(); |
46900298 JB |
717 | } |
718 | ||
719 | put_bss: | |
720 | ieee80211_rx_bss_put(local, bss); | |
721 | } | |
722 | ||
8bf11d8d JB |
723 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
724 | const u8 *bssid, const u8 *addr, | |
725 | u32 supp_rates) | |
46900298 | 726 | { |
2e10d330 | 727 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
728 | struct ieee80211_local *local = sdata->local; |
729 | struct sta_info *sta; | |
55de908a | 730 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 731 | struct ieee80211_supported_band *sband; |
74608aca | 732 | enum nl80211_bss_scan_width scan_width; |
55de908a | 733 | int band; |
46900298 | 734 | |
af8cdcd8 JB |
735 | /* |
736 | * XXX: Consider removing the least recently used entry and | |
737 | * allow new one to be added. | |
738 | */ | |
46900298 | 739 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 740 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 741 | sdata->name, addr); |
8bf11d8d | 742 | return; |
46900298 JB |
743 | } |
744 | ||
2e10d330 | 745 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 746 | return; |
2e10d330 | 747 | |
b203ca39 | 748 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 749 | return; |
46900298 | 750 | |
55de908a JB |
751 | rcu_read_lock(); |
752 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
753 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
754 | rcu_read_unlock(); | |
755 | return; | |
756 | } | |
4bf88530 | 757 | band = chanctx_conf->def.chan->band; |
74608aca | 758 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
759 | rcu_read_unlock(); |
760 | ||
8bf11d8d | 761 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 762 | if (!sta) |
8bf11d8d | 763 | return; |
46900298 | 764 | |
c8716d9d | 765 | sta->last_rx = jiffies; |
d9a7ddb0 | 766 | |
46900298 | 767 | /* make sure mandatory rates are always added */ |
b422c6cd | 768 | sband = local->hw.wiphy->bands[band]; |
46900298 | 769 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 770 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 771 | |
8bf11d8d JB |
772 | spin_lock(&ifibss->incomplete_lock); |
773 | list_add(&sta->list, &ifibss->incomplete_stations); | |
774 | spin_unlock(&ifibss->incomplete_lock); | |
775 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
776 | } |
777 | ||
778 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) | |
779 | { | |
780 | struct ieee80211_local *local = sdata->local; | |
781 | int active = 0; | |
782 | struct sta_info *sta; | |
783 | ||
8d61ffa5 | 784 | sdata_assert_lock(sdata); |
7a17a33c | 785 | |
46900298 JB |
786 | rcu_read_lock(); |
787 | ||
788 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
789 | if (sta->sdata == sdata && | |
790 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
791 | jiffies)) { | |
792 | active++; | |
793 | break; | |
794 | } | |
795 | } | |
796 | ||
797 | rcu_read_unlock(); | |
798 | ||
799 | return active; | |
800 | } | |
801 | ||
dad9defd AQ |
802 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
803 | { | |
804 | struct ieee80211_local *local = sdata->local; | |
805 | struct sta_info *sta, *tmp; | |
806 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
807 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; | |
808 | ||
809 | mutex_lock(&local->sta_mtx); | |
810 | ||
811 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
812 | if (sdata != sta->sdata) | |
813 | continue; | |
814 | ||
815 | if (time_after(jiffies, sta->last_rx + exp_time) || | |
816 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && | |
817 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { | |
818 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
819 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
820 | "not authorized " : "", sta->sta.addr); | |
821 | ||
822 | WARN_ON(__sta_info_destroy(sta)); | |
823 | } | |
824 | } | |
825 | ||
826 | mutex_unlock(&local->sta_mtx); | |
827 | } | |
828 | ||
ce9058ae BP |
829 | /* |
830 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
831 | */ | |
46900298 JB |
832 | |
833 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
834 | { | |
835 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 836 | enum nl80211_bss_scan_width scan_width; |
46900298 | 837 | |
8d61ffa5 | 838 | sdata_assert_lock(sdata); |
7a17a33c | 839 | |
af8cdcd8 JB |
840 | mod_timer(&ifibss->timer, |
841 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 842 | |
dad9defd | 843 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 844 | |
450aae3d S |
845 | if (time_before(jiffies, ifibss->last_scan_completed + |
846 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
847 | return; | |
848 | ||
46900298 JB |
849 | if (ieee80211_sta_active_ibss(sdata)) |
850 | return; | |
851 | ||
c037b836 | 852 | if (ifibss->fixed_channel) |
46900298 JB |
853 | return; |
854 | ||
bdcbd8e0 JB |
855 | sdata_info(sdata, |
856 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 857 | |
7ca15a0a | 858 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 859 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
7ca15a0a | 860 | NULL, scan_width); |
46900298 JB |
861 | } |
862 | ||
af8cdcd8 | 863 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
864 | { |
865 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 866 | u8 bssid[ETH_ALEN]; |
46900298 JB |
867 | u16 capability; |
868 | int i; | |
869 | ||
8d61ffa5 | 870 | sdata_assert_lock(sdata); |
7a17a33c | 871 | |
af8cdcd8 | 872 | if (ifibss->fixed_bssid) { |
46900298 JB |
873 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
874 | } else { | |
875 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
876 | * own MAC address to make sure that devices that do not have proper | |
877 | * random number generator get different BSSID. */ | |
878 | get_random_bytes(bssid, ETH_ALEN); | |
879 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 880 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
881 | bssid[0] &= ~0x01; |
882 | bssid[0] |= 0x02; | |
883 | } | |
884 | ||
bdcbd8e0 | 885 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 886 | |
46900298 JB |
887 | capability = WLAN_CAPABILITY_IBSS; |
888 | ||
fffd0934 | 889 | if (ifibss->privacy) |
46900298 JB |
890 | capability |= WLAN_CAPABILITY_PRIVACY; |
891 | else | |
892 | sdata->drop_unencrypted = 0; | |
893 | ||
57c4d7b4 | 894 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 895 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 896 | capability, 0, true); |
46900298 JB |
897 | } |
898 | ||
ce9058ae BP |
899 | /* |
900 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
901 | */ | |
902 | ||
af8cdcd8 | 903 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
904 | { |
905 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
906 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 907 | struct cfg80211_bss *cbss; |
af8cdcd8 | 908 | struct ieee80211_channel *chan = NULL; |
46900298 | 909 | const u8 *bssid = NULL; |
7ca15a0a | 910 | enum nl80211_bss_scan_width scan_width; |
46900298 | 911 | int active_ibss; |
e0d61887 | 912 | u16 capability; |
46900298 | 913 | |
8d61ffa5 | 914 | sdata_assert_lock(sdata); |
7a17a33c | 915 | |
46900298 | 916 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 917 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
918 | |
919 | if (active_ibss) | |
af8cdcd8 | 920 | return; |
46900298 | 921 | |
e0d61887 | 922 | capability = WLAN_CAPABILITY_IBSS; |
fffd0934 | 923 | if (ifibss->privacy) |
e0d61887 | 924 | capability |= WLAN_CAPABILITY_PRIVACY; |
af8cdcd8 JB |
925 | if (ifibss->fixed_bssid) |
926 | bssid = ifibss->bssid; | |
927 | if (ifibss->fixed_channel) | |
3aede78a | 928 | chan = ifibss->chandef.chan; |
af8cdcd8 | 929 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 930 | bssid = ifibss->bssid; |
0c1ad2ca JB |
931 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
932 | ifibss->ssid, ifibss->ssid_len, | |
933 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, | |
934 | capability); | |
935 | ||
936 | if (cbss) { | |
937 | struct ieee80211_bss *bss; | |
46900298 | 938 | |
0c1ad2ca | 939 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
940 | ibss_dbg(sdata, |
941 | "sta_find_ibss: selected %pM current %pM\n", | |
942 | cbss->bssid, ifibss->bssid); | |
943 | sdata_info(sdata, | |
944 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
945 | cbss->bssid); | |
46900298 | 946 | |
af8cdcd8 | 947 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 948 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 949 | return; |
d419b9f0 | 950 | } |
46900298 | 951 | |
d8eb741e AQ |
952 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
953 | * directly and do not waste time scanning | |
954 | */ | |
955 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
956 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
957 | bssid); | |
958 | ieee80211_sta_create_ibss(sdata); | |
959 | return; | |
960 | } | |
961 | ||
962 | ||
bdcbd8e0 | 963 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
964 | |
965 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 966 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 967 | IEEE80211_SCAN_INTERVAL)) { |
bdcbd8e0 | 968 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 969 | |
7ca15a0a | 970 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 971 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
7ca15a0a SW |
972 | ifibss->ssid_len, chan, |
973 | scan_width); | |
ce9058ae | 974 | } else { |
46900298 JB |
975 | int interval = IEEE80211_SCAN_INTERVAL; |
976 | ||
977 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
978 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
979 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 980 | |
af8cdcd8 JB |
981 | mod_timer(&ifibss->timer, |
982 | round_jiffies(jiffies + interval)); | |
46900298 | 983 | } |
46900298 JB |
984 | } |
985 | ||
986 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 987 | struct sk_buff *req) |
46900298 | 988 | { |
c269a203 | 989 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
990 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
991 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 992 | int tx_last_beacon, len = req->len; |
46900298 | 993 | struct sk_buff *skb; |
c3ffeab4 | 994 | struct beacon_data *presp; |
46900298 JB |
995 | u8 *pos, *end; |
996 | ||
8d61ffa5 | 997 | sdata_assert_lock(sdata); |
7a17a33c | 998 | |
40b275b6 | 999 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1000 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1001 | |
46900298 | 1002 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1003 | len < 24 + 2 || !presp) |
46900298 JB |
1004 | return; |
1005 | ||
24487981 | 1006 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1007 | |
bdcbd8e0 JB |
1008 | ibss_dbg(sdata, |
1009 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", | |
1010 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); | |
46900298 | 1011 | |
1ed76487 | 1012 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1013 | return; |
1014 | ||
b203ca39 | 1015 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1016 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1017 | return; |
1018 | ||
1019 | end = ((u8 *) mgmt) + len; | |
1020 | pos = mgmt->u.probe_req.variable; | |
1021 | if (pos[0] != WLAN_EID_SSID || | |
1022 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1023 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1024 | mgmt->sa); | |
46900298 JB |
1025 | return; |
1026 | } | |
1027 | if (pos[1] != 0 && | |
1028 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1029 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1030 | /* Ignore ProbeReq for foreign SSID */ |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1035 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1036 | if (!skb) |
1037 | return; | |
1038 | ||
c3ffeab4 JB |
1039 | skb_reserve(skb, local->tx_headroom); |
1040 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); | |
1041 | ||
1042 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1043 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be JB |
1044 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1045 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
1046 | } |
1047 | ||
d45c4172 EG |
1048 | static |
1049 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1050 | struct ieee80211_mgmt *mgmt, size_t len, | |
1051 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1052 | { |
1053 | size_t baselen; | |
1054 | struct ieee802_11_elems elems; | |
1055 | ||
d45c4172 EG |
1056 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1057 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1058 | ||
1059 | /* | |
1060 | * either beacon or probe_resp but the variable field is at the | |
1061 | * same offset | |
1062 | */ | |
46900298 JB |
1063 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1064 | if (baselen > len) | |
1065 | return; | |
1066 | ||
1067 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1068 | false, &elems); |
46900298 | 1069 | |
d45c4172 | 1070 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1071 | } |
1072 | ||
1fa57d01 JB |
1073 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1074 | struct sk_buff *skb) | |
46900298 JB |
1075 | { |
1076 | struct ieee80211_rx_status *rx_status; | |
1077 | struct ieee80211_mgmt *mgmt; | |
1078 | u16 fc; | |
1079 | ||
f1d58c25 | 1080 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1081 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1082 | fc = le16_to_cpu(mgmt->frame_control); | |
1083 | ||
8d61ffa5 | 1084 | sdata_lock(sdata); |
7a17a33c | 1085 | |
c926d006 TH |
1086 | if (!sdata->u.ibss.ssid_len) |
1087 | goto mgmt_out; /* not ready to merge yet */ | |
1088 | ||
46900298 JB |
1089 | switch (fc & IEEE80211_FCTL_STYPE) { |
1090 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1091 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1092 | break; |
1093 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1094 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1095 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1096 | rx_status); | |
46900298 JB |
1097 | break; |
1098 | case IEEE80211_STYPE_AUTH: | |
1099 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1100 | break; | |
2cc59e78 AQ |
1101 | case IEEE80211_STYPE_DEAUTH: |
1102 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1103 | break; | |
46900298 | 1104 | } |
7a17a33c | 1105 | |
c926d006 | 1106 | mgmt_out: |
8d61ffa5 | 1107 | sdata_unlock(sdata); |
46900298 JB |
1108 | } |
1109 | ||
1fa57d01 | 1110 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1111 | { |
1fa57d01 | 1112 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1113 | struct sta_info *sta; |
46900298 | 1114 | |
8d61ffa5 | 1115 | sdata_lock(sdata); |
7a17a33c JB |
1116 | |
1117 | /* | |
1118 | * Work could be scheduled after scan or similar | |
1119 | * when we aren't even joined (or trying) with a | |
1120 | * network. | |
1121 | */ | |
1122 | if (!ifibss->ssid_len) | |
1123 | goto out; | |
46900298 | 1124 | |
8bf11d8d JB |
1125 | spin_lock_bh(&ifibss->incomplete_lock); |
1126 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1127 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1128 | struct sta_info, list); | |
1129 | list_del(&sta->list); | |
1130 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1131 | ||
52874a5e | 1132 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1133 | rcu_read_unlock(); |
1134 | spin_lock_bh(&ifibss->incomplete_lock); | |
1135 | } | |
1136 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1137 | ||
46900298 JB |
1138 | switch (ifibss->state) { |
1139 | case IEEE80211_IBSS_MLME_SEARCH: | |
1140 | ieee80211_sta_find_ibss(sdata); | |
1141 | break; | |
1142 | case IEEE80211_IBSS_MLME_JOINED: | |
1143 | ieee80211_sta_merge_ibss(sdata); | |
1144 | break; | |
1145 | default: | |
1146 | WARN_ON(1); | |
1147 | break; | |
1148 | } | |
46900298 | 1149 | |
7a17a33c | 1150 | out: |
8d61ffa5 | 1151 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1152 | } |
1153 | ||
46900298 JB |
1154 | static void ieee80211_ibss_timer(unsigned long data) |
1155 | { | |
1156 | struct ieee80211_sub_if_data *sdata = | |
1157 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 1158 | |
a6182943 | 1159 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1160 | } |
5bb644a0 | 1161 | |
46900298 JB |
1162 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1163 | { | |
1164 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1165 | ||
46900298 JB |
1166 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
1167 | (unsigned long) sdata); | |
8bf11d8d JB |
1168 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1169 | spin_lock_init(&ifibss->incomplete_lock); | |
46900298 JB |
1170 | } |
1171 | ||
1172 | /* scan finished notification */ | |
1173 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1174 | { | |
af8cdcd8 | 1175 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1176 | |
29b4a4f7 JB |
1177 | mutex_lock(&local->iflist_mtx); |
1178 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1179 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1180 | continue; |
af8cdcd8 JB |
1181 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1182 | continue; | |
1183 | sdata->u.ibss.last_scan_completed = jiffies; | |
7a17a33c | 1184 | ieee80211_queue_work(&local->hw, &sdata->work); |
46900298 | 1185 | } |
29b4a4f7 | 1186 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1187 | } |
1188 | ||
af8cdcd8 JB |
1189 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1190 | struct cfg80211_ibss_params *params) | |
1191 | { | |
ff3cc5f4 | 1192 | u32 changed = 0; |
2103dec1 SW |
1193 | u32 rate_flags; |
1194 | struct ieee80211_supported_band *sband; | |
1195 | int i; | |
af8cdcd8 | 1196 | |
af8cdcd8 JB |
1197 | if (params->bssid) { |
1198 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1199 | sdata->u.ibss.fixed_bssid = true; | |
1200 | } else | |
1201 | sdata->u.ibss.fixed_bssid = false; | |
1202 | ||
fffd0934 | 1203 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1204 | sdata->u.ibss.control_port = params->control_port; |
fbd2c8dc | 1205 | sdata->u.ibss.basic_rates = params->basic_rates; |
2103dec1 SW |
1206 | |
1207 | /* fix basic_rates if channel does not support these rates */ | |
1208 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
1209 | sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band]; | |
1210 | for (i = 0; i < sband->n_bitrates; i++) { | |
1211 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1212 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1213 | } | |
dd5b4cc7 FF |
1214 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1215 | sizeof(params->mcast_rate)); | |
fffd0934 | 1216 | |
57c4d7b4 JB |
1217 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1218 | ||
3aede78a | 1219 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1220 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1221 | ||
1222 | if (params->ie) { | |
1223 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1224 | GFP_KERNEL); | |
1225 | if (sdata->u.ibss.ie) | |
1226 | sdata->u.ibss.ie_len = params->ie_len; | |
1227 | } | |
1228 | ||
af8cdcd8 JB |
1229 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1230 | sdata->u.ibss.ibss_join_req = jiffies; | |
1231 | ||
badecb00 | 1232 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1233 | sdata->u.ibss.ssid_len = params->ssid_len; |
1234 | ||
822854b0 SW |
1235 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1236 | sizeof(sdata->u.ibss.ht_capa)); | |
1237 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1238 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1239 | ||
ff3cc5f4 SW |
1240 | /* |
1241 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1242 | * reserved, but an HT STA shall protect HT transmissions as though | |
1243 | * the HT Protection field were set to non-HT mixed mode. | |
1244 | * | |
1245 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1246 | * also reserved, but an HT STA shall operate as though this field | |
1247 | * were set to 1. | |
1248 | */ | |
1249 | ||
1250 | sdata->vif.bss_conf.ht_operation_mode |= | |
1251 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1252 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1253 | ||
1254 | changed |= BSS_CHANGED_HT; | |
1255 | ieee80211_bss_info_change_notify(sdata, changed); | |
1256 | ||
04ecd257 JB |
1257 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
1258 | sdata->needed_rx_chains = sdata->local->rx_chains; | |
1259 | ||
64592c8f | 1260 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
af8cdcd8 JB |
1261 | |
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1266 | { | |
5ea096c0 TP |
1267 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1268 | struct ieee80211_local *local = sdata->local; | |
1269 | struct cfg80211_bss *cbss; | |
1270 | u16 capability; | |
7a17a33c | 1271 | int active_ibss; |
8bf11d8d | 1272 | struct sta_info *sta; |
c3ffeab4 | 1273 | struct beacon_data *presp; |
7a17a33c | 1274 | |
5ea096c0 TP |
1275 | active_ibss = ieee80211_sta_active_ibss(sdata); |
1276 | ||
1277 | if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { | |
1278 | capability = WLAN_CAPABILITY_IBSS; | |
1279 | ||
1280 | if (ifibss->privacy) | |
1281 | capability |= WLAN_CAPABILITY_PRIVACY; | |
1282 | ||
3aede78a | 1283 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
5ea096c0 TP |
1284 | ifibss->bssid, ifibss->ssid, |
1285 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | | |
1286 | WLAN_CAPABILITY_PRIVACY, | |
1287 | capability); | |
1288 | ||
1289 | if (cbss) { | |
1290 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
5b112d3d | 1291 | cfg80211_put_bss(local->hw.wiphy, cbss); |
5ea096c0 TP |
1292 | } |
1293 | } | |
af8cdcd8 | 1294 | |
b78a4932 SW |
1295 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; |
1296 | memset(ifibss->bssid, 0, ETH_ALEN); | |
1297 | ifibss->ssid_len = 0; | |
1298 | ||
b998e8bb | 1299 | sta_info_flush(sdata); |
8bf11d8d JB |
1300 | |
1301 | spin_lock_bh(&ifibss->incomplete_lock); | |
1302 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1303 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1304 | struct sta_info, list); | |
1305 | list_del(&sta->list); | |
1306 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1307 | ||
1308 | sta_info_free(local, sta); | |
1309 | spin_lock_bh(&ifibss->incomplete_lock); | |
1310 | } | |
1311 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1312 | ||
86a2ea41 | 1313 | netif_carrier_off(sdata->dev); |
af8cdcd8 JB |
1314 | |
1315 | /* remove beacon */ | |
1316 | kfree(sdata->u.ibss.ie); | |
c3ffeab4 | 1317 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1318 | lockdep_is_held(&sdata->wdev.mtx)); |
a9b3cd7f | 1319 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
822854b0 SW |
1320 | |
1321 | /* on the next join, re-program HT parameters */ | |
1322 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1323 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1324 | ||
8fc214ba | 1325 | sdata->vif.bss_conf.ibss_joined = false; |
c13a765b | 1326 | sdata->vif.bss_conf.ibss_creator = false; |
d6a83228 | 1327 | sdata->vif.bss_conf.enable_beacon = false; |
0ca54f6c | 1328 | sdata->vif.bss_conf.ssid_len = 0; |
d6a83228 | 1329 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
8fc214ba JB |
1330 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
1331 | BSS_CHANGED_IBSS); | |
2a3ba63c | 1332 | ieee80211_vif_release_channel(sdata); |
af8cdcd8 | 1333 | synchronize_rcu(); |
c3ffeab4 | 1334 | kfree(presp); |
af8cdcd8 | 1335 | |
35f20c14 | 1336 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1337 | |
bc05d19f | 1338 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1339 | |
af8cdcd8 JB |
1340 | return 0; |
1341 | } |