Commit | Line | Data |
---|---|---|
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); |
abcff6ef JD |
191 | |
192 | /* add VHT capability and information IEs */ | |
193 | if (chandef->width != NL80211_CHAN_WIDTH_20 && | |
194 | chandef->width != NL80211_CHAN_WIDTH_40 && | |
195 | sband->vht_cap.vht_supported) { | |
196 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
197 | sband->vht_cap.cap); | |
198 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, | |
199 | chandef); | |
200 | } | |
13c40c54 AS |
201 | } |
202 | ||
40b861a0 AN |
203 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
204 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 205 | |
c3ffeab4 JB |
206 | presp->head_len = pos - presp->head; |
207 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
208 | goto error; |
209 | ||
210 | return presp; | |
211 | error: | |
212 | kfree(presp); | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
217 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 218 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
219 | const u32 basic_rates, |
220 | const u16 capability, u64 tsf, | |
221 | bool creator) | |
222 | { | |
223 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
224 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
225 | struct ieee80211_mgmt *mgmt; |
226 | struct cfg80211_bss *bss; | |
227 | u32 bss_change; | |
228 | struct cfg80211_chan_def chandef; | |
b35c8097 | 229 | struct ieee80211_channel *chan; |
d51b70ff SW |
230 | struct beacon_data *presp; |
231 | enum nl80211_bss_scan_width scan_width; | |
232 | bool have_higher_than_11mbit; | |
2beb6dab | 233 | bool radar_required; |
55fff501 | 234 | int err; |
d51b70ff SW |
235 | |
236 | sdata_assert_lock(sdata); | |
237 | ||
238 | /* Reset own TSF to allow time synchronization work. */ | |
239 | drv_reset_tsf(local, sdata); | |
240 | ||
241 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
242 | sta_info_flush(sdata); | |
243 | ||
244 | /* if merging, indicate to driver that we leave the old IBSS */ | |
245 | if (sdata->vif.bss_conf.ibss_joined) { | |
246 | sdata->vif.bss_conf.ibss_joined = false; | |
247 | sdata->vif.bss_conf.ibss_creator = false; | |
248 | sdata->vif.bss_conf.enable_beacon = false; | |
249 | netif_carrier_off(sdata->dev); | |
250 | ieee80211_bss_info_change_notify(sdata, | |
251 | BSS_CHANGED_IBSS | | |
252 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 253 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
254 | } |
255 | ||
256 | presp = rcu_dereference_protected(ifibss->presp, | |
257 | lockdep_is_held(&sdata->wdev.mtx)); | |
0c2bef46 | 258 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
259 | if (presp) |
260 | kfree_rcu(presp, rcu_head); | |
261 | ||
b35c8097 JL |
262 | /* make a copy of the chandef, it could be modified below. */ |
263 | chandef = *req_chandef; | |
264 | chan = chandef.chan; | |
174e0cd2 IP |
265 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
266 | NL80211_IFTYPE_ADHOC)) { | |
d51b70ff SW |
267 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
268 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
269 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
270 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
271 | sdata_info(sdata, | |
272 | "Failed to join IBSS, beacons forbidden\n"); | |
273 | return; | |
274 | } | |
275 | chandef.width = NL80211_CHAN_WIDTH_20; | |
276 | chandef.center_freq1 = chan->center_freq; | |
8e8d347d | 277 | /* check again for downgraded chandef */ |
174e0cd2 IP |
278 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
279 | NL80211_IFTYPE_ADHOC)) { | |
8e8d347d SW |
280 | sdata_info(sdata, |
281 | "Failed to join IBSS, beacons forbidden\n"); | |
282 | return; | |
283 | } | |
284 | } | |
285 | ||
286 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab | 287 | &chandef, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
288 | if (err < 0) { |
289 | sdata_info(sdata, | |
290 | "Failed to join IBSS, invalid chandef\n"); | |
291 | return; | |
292 | } | |
2beb6dab LC |
293 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
294 | sdata_info(sdata, | |
295 | "Failed to join IBSS, DFS channel without control program\n"); | |
296 | return; | |
d51b70ff SW |
297 | } |
298 | ||
2beb6dab LC |
299 | radar_required = err; |
300 | ||
34a3740d | 301 | mutex_lock(&local->mtx); |
d51b70ff SW |
302 | if (ieee80211_vif_use_channel(sdata, &chandef, |
303 | ifibss->fixed_channel ? | |
304 | IEEE80211_CHANCTX_SHARED : | |
305 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
306 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
34a3740d | 307 | mutex_unlock(&local->mtx); |
d51b70ff SW |
308 | return; |
309 | } | |
cc901de1 | 310 | sdata->radar_required = radar_required; |
34a3740d | 311 | mutex_unlock(&local->mtx); |
d51b70ff SW |
312 | |
313 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
314 | ||
d51b70ff SW |
315 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
316 | capability, tsf, &chandef, | |
cd7760e6 | 317 | &have_higher_than_11mbit, NULL); |
d51b70ff | 318 | if (!presp) |
c3ffeab4 JB |
319 | return; |
320 | ||
321 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 322 | mgmt = (void *)presp->head; |
46900298 | 323 | |
d6a83228 | 324 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 325 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 326 | sdata->vif.bss_conf.basic_rates = basic_rates; |
0ca54f6c MP |
327 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
328 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
329 | bss_change = BSS_CHANGED_BEACON_INT; |
330 | bss_change |= ieee80211_reset_erp_info(sdata); | |
331 | bss_change |= BSS_CHANGED_BSSID; | |
332 | bss_change |= BSS_CHANGED_BEACON; | |
333 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 334 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 335 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 336 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 337 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
338 | |
339 | /* | |
340 | * In 5 GHz/802.11a, we can always use short slot time. | |
341 | * (IEEE 802.11-2012 18.3.8.7) | |
342 | * | |
343 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
344 | * reasons. | |
345 | * (IEEE 802.11-2012 19.4.5) | |
346 | * | |
347 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
348 | */ | |
349 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; | |
350 | bss_change |= BSS_CHANGED_ERP_SLOT; | |
351 | ||
2ec9c1f6 SW |
352 | /* cf. IEEE 802.11 9.2.12 */ |
353 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) | |
354 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
355 | else | |
356 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
357 | ||
55fff501 JB |
358 | ieee80211_set_wmm_default(sdata, true); |
359 | ||
8fc214ba | 360 | sdata->vif.bss_conf.ibss_joined = true; |
c13a765b | 361 | sdata->vif.bss_conf.ibss_creator = creator; |
46900298 | 362 | |
55fff501 JB |
363 | err = drv_join_ibss(local, sdata); |
364 | if (err) { | |
365 | sdata->vif.bss_conf.ibss_joined = false; | |
366 | sdata->vif.bss_conf.ibss_creator = false; | |
367 | sdata->vif.bss_conf.enable_beacon = false; | |
368 | sdata->vif.bss_conf.ssid_len = 0; | |
369 | RCU_INIT_POINTER(ifibss->presp, NULL); | |
370 | kfree_rcu(presp, rcu_head); | |
34a3740d | 371 | mutex_lock(&local->mtx); |
55fff501 | 372 | ieee80211_vif_release_channel(sdata); |
34a3740d | 373 | mutex_unlock(&local->mtx); |
55fff501 JB |
374 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
375 | err); | |
376 | return; | |
377 | } | |
378 | ||
379 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 380 | |
46900298 | 381 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
382 | mod_timer(&ifibss->timer, |
383 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 384 | |
7ca15a0a SW |
385 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
386 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, | |
387 | scan_width, mgmt, | |
388 | presp->head_len, 0, GFP_KERNEL); | |
5b112d3d | 389 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 390 | netif_carrier_on(sdata->dev); |
fe94f3a4 | 391 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
46900298 JB |
392 | } |
393 | ||
af8cdcd8 JB |
394 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
395 | struct ieee80211_bss *bss) | |
46900298 | 396 | { |
0c1ad2ca JB |
397 | struct cfg80211_bss *cbss = |
398 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 399 | struct ieee80211_supported_band *sband; |
75a423f4 | 400 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
401 | u32 basic_rates; |
402 | int i, j; | |
0c1ad2ca | 403 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 404 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 405 | enum nl80211_channel_type chan_type; |
8cef2c9d | 406 | u64 tsf; |
2103dec1 SW |
407 | u32 rate_flags; |
408 | int shift; | |
57c4d7b4 | 409 | |
8d61ffa5 | 410 | sdata_assert_lock(sdata); |
7a17a33c | 411 | |
57c4d7b4 JB |
412 | if (beacon_int < 10) |
413 | beacon_int = 10; | |
414 | ||
75a423f4 SW |
415 | switch (sdata->u.ibss.chandef.width) { |
416 | case NL80211_CHAN_WIDTH_20_NOHT: | |
417 | case NL80211_CHAN_WIDTH_20: | |
418 | case NL80211_CHAN_WIDTH_40: | |
419 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
420 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
421 | break; | |
422 | case NL80211_CHAN_WIDTH_5: | |
423 | case NL80211_CHAN_WIDTH_10: | |
424 | cfg80211_chandef_create(&chandef, cbss->channel, | |
425 | NL80211_CHAN_WIDTH_20_NOHT); | |
426 | chandef.width = sdata->u.ibss.chandef.width; | |
427 | break; | |
abcff6ef JD |
428 | case NL80211_CHAN_WIDTH_80: |
429 | case NL80211_CHAN_WIDTH_160: | |
430 | chandef = sdata->u.ibss.chandef; | |
431 | chandef.chan = cbss->channel; | |
432 | break; | |
75a423f4 SW |
433 | default: |
434 | /* fall back to 20 MHz for unsupported modes */ | |
435 | cfg80211_chandef_create(&chandef, cbss->channel, | |
436 | NL80211_CHAN_WIDTH_20_NOHT); | |
437 | break; | |
438 | } | |
439 | ||
0c1ad2ca | 440 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
441 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
442 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
443 | |
444 | basic_rates = 0; | |
445 | ||
446 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 447 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
448 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
449 | ||
450 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
451 | int brate; |
452 | if ((rate_flags & sband->bitrates[j].flags) | |
453 | != rate_flags) | |
454 | continue; | |
455 | ||
456 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
457 | 5 * (1 << shift)); | |
458 | if (brate == rate) { | |
b59066a2 JB |
459 | if (is_basic) |
460 | basic_rates |= BIT(j); | |
461 | break; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
8cef2c9d JB |
466 | rcu_read_lock(); |
467 | ies = rcu_dereference(cbss->ies); | |
468 | tsf = ies->tsf; | |
469 | rcu_read_unlock(); | |
470 | ||
0c1ad2ca | 471 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 472 | beacon_int, |
75a423f4 | 473 | &chandef, |
b59066a2 | 474 | basic_rates, |
0c1ad2ca | 475 | cbss->capability, |
8cef2c9d | 476 | tsf, false); |
46900298 JB |
477 | } |
478 | ||
cd7760e6 SW |
479 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
480 | struct cfg80211_csa_settings *csa_settings) | |
481 | { | |
482 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
483 | struct beacon_data *presp, *old_presp; | |
484 | struct cfg80211_bss *cbss; | |
485 | const struct cfg80211_bss_ies *ies; | |
6eb18137 | 486 | u16 capability = 0; |
cd7760e6 SW |
487 | u64 tsf; |
488 | int ret = 0; | |
489 | ||
490 | sdata_assert_lock(sdata); | |
491 | ||
cd7760e6 | 492 | if (ifibss->privacy) |
6eb18137 | 493 | capability = WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
494 | |
495 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
496 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
497 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
498 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
499 | |
500 | if (WARN_ON(!cbss)) { | |
501 | ret = -EINVAL; | |
502 | goto out; | |
503 | } | |
504 | ||
505 | rcu_read_lock(); | |
506 | ies = rcu_dereference(cbss->ies); | |
507 | tsf = ies->tsf; | |
508 | rcu_read_unlock(); | |
509 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
510 | ||
511 | old_presp = rcu_dereference_protected(ifibss->presp, | |
512 | lockdep_is_held(&sdata->wdev.mtx)); | |
513 | ||
514 | presp = ieee80211_ibss_build_presp(sdata, | |
515 | sdata->vif.bss_conf.beacon_int, | |
516 | sdata->vif.bss_conf.basic_rates, | |
517 | capability, tsf, &ifibss->chandef, | |
518 | NULL, csa_settings); | |
519 | if (!presp) { | |
520 | ret = -ENOMEM; | |
521 | goto out; | |
522 | } | |
523 | ||
524 | rcu_assign_pointer(ifibss->presp, presp); | |
525 | if (old_presp) | |
526 | kfree_rcu(old_presp, rcu_head); | |
527 | ||
dddd586b | 528 | return BSS_CHANGED_BEACON; |
cd7760e6 SW |
529 | out: |
530 | return ret; | |
531 | } | |
532 | ||
533 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) | |
534 | { | |
535 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
536 | struct cfg80211_bss *cbss; | |
faf046e7 | 537 | int err, changed = 0; |
cd7760e6 | 538 | |
bafdc614 SW |
539 | sdata_assert_lock(sdata); |
540 | ||
cd7760e6 SW |
541 | /* update cfg80211 bss information with the new channel */ |
542 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
543 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
544 | ifibss->chandef.chan, | |
545 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
546 | ifibss->ssid_len, |
547 | IEEE80211_BSS_TYPE_IBSS, | |
548 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
549 | /* XXX: should not really modify cfg80211 data */ |
550 | if (cbss) { | |
33787fc4 | 551 | cbss->channel = sdata->csa_chandef.chan; |
cd7760e6 SW |
552 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
553 | } | |
554 | } | |
555 | ||
33787fc4 | 556 | ifibss->chandef = sdata->csa_chandef; |
cd7760e6 SW |
557 | |
558 | /* generate the beacon */ | |
559 | err = ieee80211_ibss_csa_beacon(sdata, NULL); | |
cd7760e6 SW |
560 | if (err < 0) |
561 | return err; | |
562 | ||
faf046e7 | 563 | changed |= err; |
dddd586b | 564 | |
faf046e7 | 565 | return changed; |
cd7760e6 SW |
566 | } |
567 | ||
568 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
569 | { | |
570 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
571 | ||
572 | cancel_work_sync(&ifibss->csa_connection_drop_work); | |
573 | } | |
574 | ||
52874a5e | 575 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
576 | __acquires(RCU) |
577 | { | |
578 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
579 | u8 addr[ETH_ALEN]; | |
580 | ||
581 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
582 | ||
bdcbd8e0 | 583 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 584 | |
83d5cc01 JB |
585 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
586 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
587 | /* authorize the station only if the network is not RSN protected. If |
588 | * not wait for the userspace to authorize it */ | |
589 | if (!sta->sdata->u.ibss.control_port) | |
590 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
591 | |
592 | rate_control_rate_init(sta); | |
593 | ||
594 | /* If it fails, maybe we raced another insertion? */ | |
595 | if (sta_info_insert_rcu(sta)) | |
596 | return sta_info_get(sdata, addr); | |
597 | return sta; | |
598 | } | |
599 | ||
600 | static struct sta_info * | |
52874a5e AQ |
601 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
602 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
603 | __acquires(RCU) |
604 | { | |
605 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
606 | struct ieee80211_local *local = sdata->local; | |
607 | struct sta_info *sta; | |
55de908a | 608 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 609 | struct ieee80211_supported_band *sband; |
74608aca | 610 | enum nl80211_bss_scan_width scan_width; |
55de908a | 611 | int band; |
8bf11d8d JB |
612 | |
613 | /* | |
614 | * XXX: Consider removing the least recently used entry and | |
615 | * allow new one to be added. | |
616 | */ | |
617 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 618 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 619 | sdata->name, addr); |
8bf11d8d JB |
620 | rcu_read_lock(); |
621 | return NULL; | |
622 | } | |
623 | ||
624 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
625 | rcu_read_lock(); | |
626 | return NULL; | |
627 | } | |
628 | ||
b203ca39 | 629 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
630 | rcu_read_lock(); |
631 | return NULL; | |
632 | } | |
633 | ||
55de908a JB |
634 | rcu_read_lock(); |
635 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
636 | if (WARN_ON_ONCE(!chanctx_conf)) | |
637 | return NULL; | |
4bf88530 | 638 | band = chanctx_conf->def.chan->band; |
74608aca | 639 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
640 | rcu_read_unlock(); |
641 | ||
8bf11d8d JB |
642 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
643 | if (!sta) { | |
644 | rcu_read_lock(); | |
645 | return NULL; | |
646 | } | |
647 | ||
648 | sta->last_rx = jiffies; | |
649 | ||
650 | /* make sure mandatory rates are always added */ | |
b422c6cd | 651 | sband = local->hw.wiphy->bands[band]; |
8bf11d8d | 652 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 653 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 654 | |
52874a5e | 655 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
656 | } |
657 | ||
871a4180 SW |
658 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
659 | { | |
660 | struct ieee80211_local *local = sdata->local; | |
661 | int active = 0; | |
662 | struct sta_info *sta; | |
663 | ||
664 | sdata_assert_lock(sdata); | |
665 | ||
666 | rcu_read_lock(); | |
667 | ||
668 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
669 | if (sta->sdata == sdata && | |
670 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
671 | jiffies)) { | |
672 | active++; | |
673 | break; | |
674 | } | |
675 | } | |
676 | ||
677 | rcu_read_unlock(); | |
678 | ||
679 | return active; | |
680 | } | |
681 | ||
682 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
683 | { | |
684 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
685 | struct ieee80211_local *local = sdata->local; | |
686 | struct cfg80211_bss *cbss; | |
687 | struct beacon_data *presp; | |
688 | struct sta_info *sta; | |
871a4180 | 689 | |
d4c80d9d | 690 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
691 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
692 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
693 | ifibss->ssid_len, |
694 | IEEE80211_BSS_TYPE_IBSS, | |
695 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
696 | |
697 | if (cbss) { | |
698 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
699 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
700 | } | |
701 | } | |
702 | ||
703 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
704 | ||
705 | sta_info_flush(sdata); | |
706 | ||
707 | spin_lock_bh(&ifibss->incomplete_lock); | |
708 | while (!list_empty(&ifibss->incomplete_stations)) { | |
709 | sta = list_first_entry(&ifibss->incomplete_stations, | |
710 | struct sta_info, list); | |
711 | list_del(&sta->list); | |
712 | spin_unlock_bh(&ifibss->incomplete_lock); | |
713 | ||
714 | sta_info_free(local, sta); | |
715 | spin_lock_bh(&ifibss->incomplete_lock); | |
716 | } | |
717 | spin_unlock_bh(&ifibss->incomplete_lock); | |
718 | ||
719 | netif_carrier_off(sdata->dev); | |
720 | ||
721 | sdata->vif.bss_conf.ibss_joined = false; | |
722 | sdata->vif.bss_conf.ibss_creator = false; | |
723 | sdata->vif.bss_conf.enable_beacon = false; | |
724 | sdata->vif.bss_conf.ssid_len = 0; | |
725 | ||
726 | /* remove beacon */ | |
727 | presp = rcu_dereference_protected(ifibss->presp, | |
728 | lockdep_is_held(&sdata->wdev.mtx)); | |
729 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); | |
730 | if (presp) | |
731 | kfree_rcu(presp, rcu_head); | |
732 | ||
733 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
734 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
735 | BSS_CHANGED_IBSS); | |
55fff501 | 736 | drv_leave_ibss(local, sdata); |
34a3740d | 737 | mutex_lock(&local->mtx); |
871a4180 | 738 | ieee80211_vif_release_channel(sdata); |
34a3740d | 739 | mutex_unlock(&local->mtx); |
871a4180 SW |
740 | } |
741 | ||
cd7760e6 SW |
742 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
743 | { | |
744 | struct ieee80211_sub_if_data *sdata = | |
745 | container_of(work, struct ieee80211_sub_if_data, | |
746 | u.ibss.csa_connection_drop_work); | |
747 | ||
6f07d216 LC |
748 | sdata_lock(sdata); |
749 | ||
cd7760e6 SW |
750 | ieee80211_ibss_disconnect(sdata); |
751 | synchronize_rcu(); | |
752 | skb_queue_purge(&sdata->skb_queue); | |
753 | ||
754 | /* trigger a scan to find another IBSS network to join */ | |
755 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
6f07d216 LC |
756 | |
757 | sdata_unlock(sdata); | |
cd7760e6 SW |
758 | } |
759 | ||
8e8d347d SW |
760 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
761 | { | |
762 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
763 | int err; | |
764 | ||
765 | /* if the current channel is a DFS channel, mark the channel as | |
766 | * unavailable. | |
767 | */ | |
768 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
769 | &ifibss->chandef, |
770 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
771 | if (err > 0) |
772 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
773 | GFP_ATOMIC); | |
774 | } | |
775 | ||
cd7760e6 SW |
776 | static bool |
777 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
778 | struct ieee802_11_elems *elems, | |
779 | bool beacon) | |
780 | { | |
781 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 782 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 783 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 784 | enum nl80211_channel_type ch_type; |
82a8e17d | 785 | int err; |
cd7760e6 | 786 | u32 sta_flags; |
cd7760e6 | 787 | |
dbd72850 MK |
788 | sdata_assert_lock(sdata); |
789 | ||
cd7760e6 SW |
790 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
791 | switch (ifibss->chandef.width) { | |
792 | case NL80211_CHAN_WIDTH_5: | |
793 | case NL80211_CHAN_WIDTH_10: | |
794 | case NL80211_CHAN_WIDTH_20_NOHT: | |
795 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
796 | /* fall through */ | |
797 | case NL80211_CHAN_WIDTH_20: | |
798 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
799 | break; | |
800 | default: | |
801 | break; | |
802 | } | |
803 | ||
804 | memset(¶ms, 0, sizeof(params)); | |
c0f17eb9 | 805 | memset(&csa_ie, 0, sizeof(csa_ie)); |
84469a45 | 806 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 807 | ifibss->chandef.chan->band, |
c0f17eb9 | 808 | sta_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
809 | /* can't switch to destination channel, fail */ |
810 | if (err < 0) | |
811 | goto disconnect; | |
812 | ||
813 | /* did not contain a CSA */ | |
814 | if (err) | |
815 | return false; | |
816 | ||
0834ae3c SW |
817 | /* channel switch is not supported, disconnect */ |
818 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
819 | goto disconnect; | |
820 | ||
c0f17eb9 CYY |
821 | params.count = csa_ie.count; |
822 | params.chandef = csa_ie.chandef; | |
823 | ||
cd7760e6 SW |
824 | switch (ifibss->chandef.width) { |
825 | case NL80211_CHAN_WIDTH_20_NOHT: | |
826 | case NL80211_CHAN_WIDTH_20: | |
827 | case NL80211_CHAN_WIDTH_40: | |
828 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
829 | * another mode has been announced. The mode is not adopted | |
830 | * within the beacon while doing CSA and we should therefore | |
831 | * keep the mode which we announce. | |
832 | */ | |
833 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
834 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
835 | ch_type); | |
836 | break; | |
837 | case NL80211_CHAN_WIDTH_5: | |
838 | case NL80211_CHAN_WIDTH_10: | |
839 | if (params.chandef.width != ifibss->chandef.width) { | |
840 | sdata_info(sdata, | |
841 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
842 | ifibss->bssid, | |
843 | params.chandef.chan->center_freq, | |
844 | params.chandef.width, | |
845 | params.chandef.center_freq1, | |
846 | params.chandef.center_freq2); | |
847 | goto disconnect; | |
848 | } | |
849 | break; | |
850 | default: | |
851 | /* should not happen, sta_flags should prevent VHT modes. */ | |
852 | WARN_ON(1); | |
853 | goto disconnect; | |
854 | } | |
855 | ||
174e0cd2 IP |
856 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
857 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
858 | sdata_info(sdata, |
859 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
860 | ifibss->bssid, | |
861 | params.chandef.chan->center_freq, | |
862 | params.chandef.width, | |
863 | params.chandef.center_freq1, | |
864 | params.chandef.center_freq2); | |
865 | goto disconnect; | |
866 | } | |
867 | ||
868 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
869 | ¶ms.chandef, |
870 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
871 | if (err < 0) |
872 | goto disconnect; | |
2beb6dab | 873 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 874 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 875 | goto disconnect; |
cd7760e6 SW |
876 | } |
877 | ||
2beb6dab LC |
878 | params.radar_required = err; |
879 | ||
82a8e17d LC |
880 | if (cfg80211_chandef_identical(¶ms.chandef, |
881 | &sdata->vif.bss_conf.chandef)) { | |
882 | ibss_dbg(sdata, | |
883 | "received csa with an identical chandef, ignoring\n"); | |
884 | return true; | |
cd7760e6 | 885 | } |
cd7760e6 SW |
886 | |
887 | /* all checks done, now perform the channel switch. */ | |
888 | ibss_dbg(sdata, | |
889 | "received channel switch announcement to go to channel %d MHz\n", | |
890 | params.chandef.chan->center_freq); | |
891 | ||
c0f17eb9 | 892 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 893 | |
82a8e17d LC |
894 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
895 | ¶ms)) | |
896 | goto disconnect; | |
cd7760e6 | 897 | |
8e8d347d SW |
898 | ieee80211_ibss_csa_mark_radar(sdata); |
899 | ||
cd7760e6 SW |
900 | return true; |
901 | disconnect: | |
902 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
903 | ieee80211_queue_work(&sdata->local->hw, | |
904 | &ifibss->csa_connection_drop_work); | |
905 | ||
8e8d347d SW |
906 | ieee80211_ibss_csa_mark_radar(sdata); |
907 | ||
cd7760e6 SW |
908 | return true; |
909 | } | |
910 | ||
911 | static void | |
912 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
913 | struct ieee80211_mgmt *mgmt, size_t len, | |
914 | struct ieee80211_rx_status *rx_status, | |
915 | struct ieee802_11_elems *elems) | |
916 | { | |
917 | int required_len; | |
918 | ||
919 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
920 | return; | |
921 | ||
922 | /* CSA is the only action we handle for now */ | |
923 | if (mgmt->u.action.u.measurement.action_code != | |
924 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
925 | return; | |
926 | ||
927 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
928 | sizeof(mgmt->u.action.u.chan_switch); | |
929 | if (len < required_len) | |
930 | return; | |
931 | ||
82a8e17d LC |
932 | if (!sdata->vif.csa_active) |
933 | ieee80211_ibss_process_chanswitch(sdata, elems, false); | |
cd7760e6 SW |
934 | } |
935 | ||
2cc59e78 AQ |
936 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
937 | struct ieee80211_mgmt *mgmt, | |
938 | size_t len) | |
939 | { | |
940 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
941 | ||
942 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
943 | return; | |
944 | ||
945 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", | |
946 | mgmt->sa, mgmt->da, mgmt->bssid, reason); | |
947 | sta_info_destroy_addr(sdata, mgmt->sa); | |
948 | } | |
949 | ||
6d810f10 AQ |
950 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
951 | struct ieee80211_mgmt *mgmt, | |
952 | size_t len) | |
953 | { | |
954 | u16 auth_alg, auth_transaction; | |
955 | ||
8d61ffa5 | 956 | sdata_assert_lock(sdata); |
6d810f10 AQ |
957 | |
958 | if (len < 24 + 6) | |
959 | return; | |
960 | ||
961 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
962 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
963 | ||
bdcbd8e0 JB |
964 | ibss_dbg(sdata, |
965 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", | |
966 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
967 | |
968 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
969 | return; | |
970 | ||
6d810f10 AQ |
971 | /* |
972 | * IEEE 802.11 standard does not require authentication in IBSS | |
973 | * networks and most implementations do not seem to use it. | |
974 | * However, try to reply to authentication attempts if someone | |
975 | * has actually implemented this. | |
976 | */ | |
700e8ea6 | 977 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 978 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
979 | } |
980 | ||
8a4988d1 JD |
981 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
982 | struct ieee80211_mgmt *mgmt, size_t len, | |
983 | struct ieee80211_rx_status *rx_status, | |
984 | struct ieee802_11_elems *elems, | |
985 | struct ieee80211_channel *channel) | |
46900298 | 986 | { |
46900298 | 987 | struct sta_info *sta; |
46900298 | 988 | enum ieee80211_band band = rx_status->band; |
74608aca | 989 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 990 | struct ieee80211_local *local = sdata->local; |
13c40c54 AS |
991 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
992 | bool rates_updated = false; | |
8a4988d1 | 993 | u32 supp_rates = 0; |
46900298 | 994 | |
8a4988d1 | 995 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
996 | return; |
997 | ||
8a4988d1 JD |
998 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
999 | return; | |
46900298 | 1000 | |
8a4988d1 JD |
1001 | rcu_read_lock(); |
1002 | sta = sta_info_get(sdata, mgmt->sa); | |
1003 | ||
1004 | if (elems->supp_rates) { | |
1005 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
1006 | band, NULL); | |
1007 | if (sta) { | |
1008 | u32 prev_rates; | |
1009 | ||
1010 | prev_rates = sta->sta.supp_rates[band]; | |
1011 | /* make sure mandatory rates are always added */ | |
1012 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
1013 | if (rx_status->flag & RX_FLAG_5MHZ) | |
1014 | scan_width = NL80211_BSS_CHAN_WIDTH_5; | |
1015 | if (rx_status->flag & RX_FLAG_10MHZ) | |
1016 | scan_width = NL80211_BSS_CHAN_WIDTH_10; | |
1017 | ||
1018 | sta->sta.supp_rates[band] = supp_rates | | |
1019 | ieee80211_mandatory_rates(sband, scan_width); | |
1020 | if (sta->sta.supp_rates[band] != prev_rates) { | |
1021 | ibss_dbg(sdata, | |
1022 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1023 | sta->sta.addr, prev_rates, | |
1024 | sta->sta.supp_rates[band]); | |
1025 | rates_updated = true; | |
8bf11d8d | 1026 | } |
8a4988d1 JD |
1027 | } else { |
1028 | rcu_read_unlock(); | |
1029 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1030 | mgmt->sa, supp_rates); | |
34e89507 | 1031 | } |
8a4988d1 | 1032 | } |
9eba6125 | 1033 | |
96a4688e JB |
1034 | if (sta && !sta->sta.wme && |
1035 | elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1036 | sta->sta.wme = true; |
96a4688e JB |
1037 | ieee80211_check_fast_xmit(sta); |
1038 | } | |
13c40c54 | 1039 | |
8a4988d1 JD |
1040 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1041 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1042 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1043 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1044 | /* we both use HT */ | |
1045 | struct ieee80211_ht_cap htcap_ie; | |
1046 | struct cfg80211_chan_def chandef; | |
abcff6ef | 1047 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth; |
d2954457 | 1048 | |
8a4988d1 JD |
1049 | ieee80211_ht_oper_to_chandef(channel, |
1050 | elems->ht_operation, | |
1051 | &chandef); | |
d2954457 | 1052 | |
8a4988d1 | 1053 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1054 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1055 | &htcap_ie, | |
1056 | sta); | |
abcff6ef JD |
1057 | |
1058 | if (elems->vht_operation && elems->vht_cap_elem && | |
1059 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1060 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1061 | /* we both use VHT */ | |
1062 | struct ieee80211_vht_cap cap_ie; | |
1063 | struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap; | |
1064 | ||
1065 | ieee80211_vht_oper_to_chandef(channel, | |
1066 | elems->vht_operation, | |
1067 | &chandef); | |
1068 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); | |
1069 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
1070 | &cap_ie, sta); | |
1071 | if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap))) | |
1072 | rates_updated |= true; | |
13c40c54 AS |
1073 | } |
1074 | ||
abcff6ef JD |
1075 | if (bw != sta->sta.bandwidth) |
1076 | rates_updated |= true; | |
d2954457 | 1077 | |
abcff6ef JD |
1078 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1079 | &chandef)) | |
1080 | WARN_ON_ONCE(1); | |
8a4988d1 | 1081 | } |
d2954457 | 1082 | |
8a4988d1 JD |
1083 | if (sta && rates_updated) { |
1084 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
1085 | u8 rx_nss = sta->sta.rx_nss; | |
13c40c54 | 1086 | |
8a4988d1 JD |
1087 | /* Force rx_nss recalculation */ |
1088 | sta->sta.rx_nss = 0; | |
1089 | rate_control_rate_init(sta); | |
1090 | if (sta->sta.rx_nss != rx_nss) | |
1091 | changed |= IEEE80211_RC_NSS_CHANGED; | |
13c40c54 | 1092 | |
8a4988d1 | 1093 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1094 | } |
1095 | ||
8a4988d1 JD |
1096 | rcu_read_unlock(); |
1097 | } | |
1098 | ||
1099 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1100 | struct ieee80211_mgmt *mgmt, size_t len, | |
1101 | struct ieee80211_rx_status *rx_status, | |
1102 | struct ieee802_11_elems *elems) | |
1103 | { | |
1104 | struct ieee80211_local *local = sdata->local; | |
1105 | struct cfg80211_bss *cbss; | |
1106 | struct ieee80211_bss *bss; | |
1107 | struct ieee80211_channel *channel; | |
1108 | u64 beacon_timestamp, rx_timestamp; | |
1109 | u32 supp_rates = 0; | |
1110 | enum ieee80211_band band = rx_status->band; | |
1111 | ||
1112 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1113 | if (!channel) | |
1114 | return; | |
1115 | ||
1116 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1117 | ||
46900298 | 1118 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
d45c4172 | 1119 | channel); |
46900298 JB |
1120 | if (!bss) |
1121 | return; | |
1122 | ||
0c1ad2ca JB |
1123 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1124 | ||
8cef2c9d JB |
1125 | /* same for beacon and probe response */ |
1126 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1127 | |
1128 | /* check if we need to merge IBSS */ | |
1129 | ||
46900298 | 1130 | /* not an IBSS */ |
0c1ad2ca | 1131 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1132 | goto put_bss; |
1133 | ||
1134 | /* different channel */ | |
55de908a | 1135 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1136 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1137 | goto put_bss; |
1138 | ||
1139 | /* different SSID */ | |
1140 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1141 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1142 | sdata->u.ibss.ssid_len)) | |
1143 | goto put_bss; | |
1144 | ||
cd7760e6 | 1145 | /* process channel switch */ |
82a8e17d LC |
1146 | if (sdata->vif.csa_active || |
1147 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) | |
cd7760e6 SW |
1148 | goto put_bss; |
1149 | ||
34e8f082 | 1150 | /* same BSSID */ |
b203ca39 | 1151 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1152 | goto put_bss; |
1153 | ||
cd7760e6 SW |
1154 | /* we use a fixed BSSID */ |
1155 | if (sdata->u.ibss.fixed_bssid) | |
1156 | goto put_bss; | |
1157 | ||
f4bda337 TP |
1158 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1159 | /* time when timestamp field was received */ | |
1160 | rx_timestamp = | |
1161 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1162 | len + FCS_LEN, 24); | |
24487981 JB |
1163 | } else { |
1164 | /* | |
1165 | * second best option: get current TSF | |
1166 | * (will return -1 if not supported) | |
1167 | */ | |
37a41b4a | 1168 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1169 | } |
46900298 | 1170 | |
bdcbd8e0 JB |
1171 | ibss_dbg(sdata, |
1172 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
1173 | mgmt->sa, mgmt->bssid, | |
1174 | (unsigned long long)rx_timestamp, | |
1175 | (unsigned long long)beacon_timestamp, | |
1176 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1177 | jiffies); | |
46900298 JB |
1178 | |
1179 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1180 | ibss_dbg(sdata, |
1181 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1182 | mgmt->bssid); | |
46900298 | 1183 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1184 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1185 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1186 | supp_rates); |
8bf11d8d | 1187 | rcu_read_unlock(); |
46900298 JB |
1188 | } |
1189 | ||
1190 | put_bss: | |
1191 | ieee80211_rx_bss_put(local, bss); | |
1192 | } | |
1193 | ||
8bf11d8d JB |
1194 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1195 | const u8 *bssid, const u8 *addr, | |
1196 | u32 supp_rates) | |
46900298 | 1197 | { |
2e10d330 | 1198 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1199 | struct ieee80211_local *local = sdata->local; |
1200 | struct sta_info *sta; | |
55de908a | 1201 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1202 | struct ieee80211_supported_band *sband; |
74608aca | 1203 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1204 | int band; |
46900298 | 1205 | |
af8cdcd8 JB |
1206 | /* |
1207 | * XXX: Consider removing the least recently used entry and | |
1208 | * allow new one to be added. | |
1209 | */ | |
46900298 | 1210 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1211 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1212 | sdata->name, addr); |
8bf11d8d | 1213 | return; |
46900298 JB |
1214 | } |
1215 | ||
2e10d330 | 1216 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1217 | return; |
2e10d330 | 1218 | |
b203ca39 | 1219 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1220 | return; |
46900298 | 1221 | |
55de908a JB |
1222 | rcu_read_lock(); |
1223 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1224 | if (WARN_ON_ONCE(!chanctx_conf)) { | |
1225 | rcu_read_unlock(); | |
1226 | return; | |
1227 | } | |
4bf88530 | 1228 | band = chanctx_conf->def.chan->band; |
74608aca | 1229 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1230 | rcu_read_unlock(); |
1231 | ||
8bf11d8d | 1232 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1233 | if (!sta) |
8bf11d8d | 1234 | return; |
46900298 | 1235 | |
c8716d9d | 1236 | sta->last_rx = jiffies; |
d9a7ddb0 | 1237 | |
46900298 | 1238 | /* make sure mandatory rates are always added */ |
b422c6cd | 1239 | sband = local->hw.wiphy->bands[band]; |
46900298 | 1240 | sta->sta.supp_rates[band] = supp_rates | |
74608aca | 1241 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1242 | |
8bf11d8d JB |
1243 | spin_lock(&ifibss->incomplete_lock); |
1244 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1245 | spin_unlock(&ifibss->incomplete_lock); | |
1246 | ieee80211_queue_work(&local->hw, &sdata->work); | |
46900298 JB |
1247 | } |
1248 | ||
dad9defd AQ |
1249 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1250 | { | |
1251 | struct ieee80211_local *local = sdata->local; | |
1252 | struct sta_info *sta, *tmp; | |
1253 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
1254 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; | |
1255 | ||
1256 | mutex_lock(&local->sta_mtx); | |
1257 | ||
1258 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
1259 | if (sdata != sta->sdata) | |
1260 | continue; | |
1261 | ||
1262 | if (time_after(jiffies, sta->last_rx + exp_time) || | |
1263 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && | |
1264 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { | |
1265 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", | |
1266 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1267 | "not authorized " : "", sta->sta.addr); | |
1268 | ||
1269 | WARN_ON(__sta_info_destroy(sta)); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | mutex_unlock(&local->sta_mtx); | |
1274 | } | |
1275 | ||
ce9058ae BP |
1276 | /* |
1277 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1278 | */ | |
46900298 JB |
1279 | |
1280 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1281 | { | |
1282 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1283 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1284 | |
8d61ffa5 | 1285 | sdata_assert_lock(sdata); |
7a17a33c | 1286 | |
af8cdcd8 JB |
1287 | mod_timer(&ifibss->timer, |
1288 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1289 | |
dad9defd | 1290 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1291 | |
450aae3d S |
1292 | if (time_before(jiffies, ifibss->last_scan_completed + |
1293 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1294 | return; | |
1295 | ||
46900298 JB |
1296 | if (ieee80211_sta_active_ibss(sdata)) |
1297 | return; | |
1298 | ||
c037b836 | 1299 | if (ifibss->fixed_channel) |
46900298 JB |
1300 | return; |
1301 | ||
bdcbd8e0 JB |
1302 | sdata_info(sdata, |
1303 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1304 | |
7ca15a0a | 1305 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1306 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1307 | NULL, 0, scan_width); |
46900298 JB |
1308 | } |
1309 | ||
af8cdcd8 | 1310 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1311 | { |
1312 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1313 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1314 | u16 capability; |
1315 | int i; | |
1316 | ||
8d61ffa5 | 1317 | sdata_assert_lock(sdata); |
7a17a33c | 1318 | |
af8cdcd8 | 1319 | if (ifibss->fixed_bssid) { |
46900298 JB |
1320 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1321 | } else { | |
1322 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1323 | * own MAC address to make sure that devices that do not have proper | |
1324 | * random number generator get different BSSID. */ | |
1325 | get_random_bytes(bssid, ETH_ALEN); | |
1326 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1327 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1328 | bssid[0] &= ~0x01; |
1329 | bssid[0] |= 0x02; | |
1330 | } | |
1331 | ||
bdcbd8e0 | 1332 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1333 | |
46900298 JB |
1334 | capability = WLAN_CAPABILITY_IBSS; |
1335 | ||
fffd0934 | 1336 | if (ifibss->privacy) |
46900298 | 1337 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1338 | |
57c4d7b4 | 1339 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1340 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1341 | capability, 0, true); |
46900298 JB |
1342 | } |
1343 | ||
76bed0f4 JD |
1344 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
1345 | struct ieee80211_channel **channels, | |
1346 | unsigned int channels_max, | |
1347 | u32 center_freq, u32 width) | |
1348 | { | |
1349 | struct ieee80211_channel *chan = NULL; | |
1350 | unsigned int n_chan = 0; | |
1351 | u32 start_freq, end_freq, freq; | |
1352 | ||
1353 | if (width <= 20) { | |
1354 | start_freq = center_freq; | |
1355 | end_freq = center_freq; | |
1356 | } else { | |
1357 | start_freq = center_freq - width / 2 + 10; | |
1358 | end_freq = center_freq + width / 2 - 10; | |
1359 | } | |
1360 | ||
1361 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1362 | chan = ieee80211_get_channel(wiphy, freq); | |
1363 | if (!chan) | |
1364 | continue; | |
1365 | if (n_chan >= channels_max) | |
1366 | return n_chan; | |
1367 | ||
1368 | channels[n_chan] = chan; | |
1369 | n_chan++; | |
1370 | } | |
1371 | ||
1372 | return n_chan; | |
1373 | } | |
1374 | ||
1375 | static unsigned int | |
1376 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1377 | const struct cfg80211_chan_def *chandef, | |
1378 | struct ieee80211_channel **channels, | |
1379 | unsigned int channels_max) | |
1380 | { | |
1381 | unsigned int n_chan = 0; | |
1382 | u32 width, cf1, cf2 = 0; | |
1383 | ||
1384 | switch (chandef->width) { | |
1385 | case NL80211_CHAN_WIDTH_40: | |
1386 | width = 40; | |
1387 | break; | |
1388 | case NL80211_CHAN_WIDTH_80P80: | |
1389 | cf2 = chandef->center_freq2; | |
1390 | /* fall through */ | |
1391 | case NL80211_CHAN_WIDTH_80: | |
1392 | width = 80; | |
1393 | break; | |
1394 | case NL80211_CHAN_WIDTH_160: | |
1395 | width = 160; | |
1396 | break; | |
1397 | default: | |
1398 | width = 20; | |
1399 | break; | |
1400 | } | |
1401 | ||
1402 | cf1 = chandef->center_freq1; | |
1403 | ||
1404 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1405 | ||
1406 | if (cf2) | |
1407 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1408 | channels_max - n_chan, cf2, | |
1409 | width); | |
1410 | ||
1411 | return n_chan; | |
1412 | } | |
1413 | ||
ce9058ae BP |
1414 | /* |
1415 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1416 | */ | |
1417 | ||
af8cdcd8 | 1418 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1419 | { |
1420 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1421 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1422 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1423 | struct ieee80211_channel *chan = NULL; |
46900298 | 1424 | const u8 *bssid = NULL; |
7ca15a0a | 1425 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1426 | int active_ibss; |
1427 | ||
8d61ffa5 | 1428 | sdata_assert_lock(sdata); |
7a17a33c | 1429 | |
46900298 | 1430 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1431 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1432 | |
1433 | if (active_ibss) | |
af8cdcd8 | 1434 | return; |
46900298 | 1435 | |
af8cdcd8 JB |
1436 | if (ifibss->fixed_bssid) |
1437 | bssid = ifibss->bssid; | |
1438 | if (ifibss->fixed_channel) | |
3aede78a | 1439 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1440 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1441 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1442 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1443 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1444 | IEEE80211_BSS_TYPE_IBSS, |
1445 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1446 | |
1447 | if (cbss) { | |
1448 | struct ieee80211_bss *bss; | |
46900298 | 1449 | |
0c1ad2ca | 1450 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1451 | ibss_dbg(sdata, |
1452 | "sta_find_ibss: selected %pM current %pM\n", | |
1453 | cbss->bssid, ifibss->bssid); | |
1454 | sdata_info(sdata, | |
1455 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1456 | cbss->bssid); | |
46900298 | 1457 | |
af8cdcd8 | 1458 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1459 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1460 | return; |
d419b9f0 | 1461 | } |
46900298 | 1462 | |
d8eb741e AQ |
1463 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1464 | * directly and do not waste time scanning | |
1465 | */ | |
1466 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1467 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1468 | bssid); | |
1469 | ieee80211_sta_create_ibss(sdata); | |
1470 | return; | |
1471 | } | |
1472 | ||
1473 | ||
bdcbd8e0 | 1474 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1475 | |
1476 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1477 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1478 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1479 | struct ieee80211_channel *channels[8]; |
1480 | unsigned int num; | |
1481 | ||
bdcbd8e0 | 1482 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1483 | |
76bed0f4 JD |
1484 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, |
1485 | &ifibss->chandef, | |
1486 | channels, | |
1487 | ARRAY_SIZE(channels)); | |
7ca15a0a | 1488 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1489 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
76bed0f4 | 1490 | ifibss->ssid_len, channels, num, |
7ca15a0a | 1491 | scan_width); |
ce9058ae | 1492 | } else { |
46900298 JB |
1493 | int interval = IEEE80211_SCAN_INTERVAL; |
1494 | ||
1495 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1496 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1497 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1498 | |
af8cdcd8 JB |
1499 | mod_timer(&ifibss->timer, |
1500 | round_jiffies(jiffies + interval)); | |
46900298 | 1501 | } |
46900298 JB |
1502 | } |
1503 | ||
1504 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1505 | struct sk_buff *req) |
46900298 | 1506 | { |
c269a203 | 1507 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1508 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1509 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1510 | int tx_last_beacon, len = req->len; |
46900298 | 1511 | struct sk_buff *skb; |
c3ffeab4 | 1512 | struct beacon_data *presp; |
46900298 JB |
1513 | u8 *pos, *end; |
1514 | ||
8d61ffa5 | 1515 | sdata_assert_lock(sdata); |
7a17a33c | 1516 | |
40b275b6 | 1517 | presp = rcu_dereference_protected(ifibss->presp, |
8d61ffa5 | 1518 | lockdep_is_held(&sdata->wdev.mtx)); |
40b275b6 | 1519 | |
46900298 | 1520 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1521 | len < 24 + 2 || !presp) |
46900298 JB |
1522 | return; |
1523 | ||
24487981 | 1524 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1525 | |
bdcbd8e0 JB |
1526 | ibss_dbg(sdata, |
1527 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", | |
1528 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); | |
46900298 | 1529 | |
1ed76487 | 1530 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1531 | return; |
1532 | ||
b203ca39 | 1533 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1534 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1535 | return; |
1536 | ||
1537 | end = ((u8 *) mgmt) + len; | |
1538 | pos = mgmt->u.probe_req.variable; | |
1539 | if (pos[0] != WLAN_EID_SSID || | |
1540 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1541 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1542 | mgmt->sa); | |
46900298 JB |
1543 | return; |
1544 | } | |
1545 | if (pos[1] != 0 && | |
1546 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1547 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1548 | /* Ignore ProbeReq for foreign SSID */ |
1549 | return; | |
1550 | } | |
1551 | ||
1552 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1553 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1554 | if (!skb) |
1555 | return; | |
1556 | ||
c3ffeab4 JB |
1557 | skb_reserve(skb, local->tx_headroom); |
1558 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); | |
1559 | ||
1560 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1561 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1562 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1563 | |
1564 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1565 | if (pos[1] == 0) | |
1566 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1567 | ||
62ae67be | 1568 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1569 | } |
1570 | ||
d45c4172 EG |
1571 | static |
1572 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1573 | struct ieee80211_mgmt *mgmt, size_t len, | |
1574 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1575 | { |
1576 | size_t baselen; | |
1577 | struct ieee802_11_elems elems; | |
1578 | ||
d45c4172 EG |
1579 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1580 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1581 | ||
1582 | /* | |
1583 | * either beacon or probe_resp but the variable field is at the | |
1584 | * same offset | |
1585 | */ | |
46900298 JB |
1586 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1587 | if (baselen > len) | |
1588 | return; | |
1589 | ||
1590 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1591 | false, &elems); |
46900298 | 1592 | |
d45c4172 | 1593 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
46900298 JB |
1594 | } |
1595 | ||
1fa57d01 JB |
1596 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1597 | struct sk_buff *skb) | |
46900298 JB |
1598 | { |
1599 | struct ieee80211_rx_status *rx_status; | |
1600 | struct ieee80211_mgmt *mgmt; | |
1601 | u16 fc; | |
cd7760e6 SW |
1602 | struct ieee802_11_elems elems; |
1603 | int ies_len; | |
46900298 | 1604 | |
f1d58c25 | 1605 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1606 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1607 | fc = le16_to_cpu(mgmt->frame_control); | |
1608 | ||
8d61ffa5 | 1609 | sdata_lock(sdata); |
7a17a33c | 1610 | |
c926d006 TH |
1611 | if (!sdata->u.ibss.ssid_len) |
1612 | goto mgmt_out; /* not ready to merge yet */ | |
1613 | ||
46900298 JB |
1614 | switch (fc & IEEE80211_FCTL_STYPE) { |
1615 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1616 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1617 | break; |
1618 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1619 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1620 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1621 | rx_status); | |
46900298 JB |
1622 | break; |
1623 | case IEEE80211_STYPE_AUTH: | |
1624 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1625 | break; | |
2cc59e78 AQ |
1626 | case IEEE80211_STYPE_DEAUTH: |
1627 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1628 | break; | |
cd7760e6 SW |
1629 | case IEEE80211_STYPE_ACTION: |
1630 | switch (mgmt->u.action.category) { | |
1631 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1632 | ies_len = skb->len - | |
1633 | offsetof(struct ieee80211_mgmt, | |
1634 | u.action.u.chan_switch.variable); | |
1635 | ||
1636 | if (ies_len < 0) | |
1637 | break; | |
1638 | ||
1639 | ieee802_11_parse_elems( | |
1640 | mgmt->u.action.u.chan_switch.variable, | |
1641 | ies_len, true, &elems); | |
1642 | ||
1643 | if (elems.parse_error) | |
1644 | break; | |
1645 | ||
1646 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, | |
1647 | rx_status, &elems); | |
1648 | break; | |
1649 | } | |
46900298 | 1650 | } |
7a17a33c | 1651 | |
c926d006 | 1652 | mgmt_out: |
8d61ffa5 | 1653 | sdata_unlock(sdata); |
46900298 JB |
1654 | } |
1655 | ||
1fa57d01 | 1656 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1657 | { |
1fa57d01 | 1658 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1659 | struct sta_info *sta; |
46900298 | 1660 | |
8d61ffa5 | 1661 | sdata_lock(sdata); |
7a17a33c JB |
1662 | |
1663 | /* | |
1664 | * Work could be scheduled after scan or similar | |
1665 | * when we aren't even joined (or trying) with a | |
1666 | * network. | |
1667 | */ | |
1668 | if (!ifibss->ssid_len) | |
1669 | goto out; | |
46900298 | 1670 | |
8bf11d8d JB |
1671 | spin_lock_bh(&ifibss->incomplete_lock); |
1672 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1673 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1674 | struct sta_info, list); | |
1675 | list_del(&sta->list); | |
1676 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1677 | ||
52874a5e | 1678 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1679 | rcu_read_unlock(); |
1680 | spin_lock_bh(&ifibss->incomplete_lock); | |
1681 | } | |
1682 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1683 | ||
46900298 JB |
1684 | switch (ifibss->state) { |
1685 | case IEEE80211_IBSS_MLME_SEARCH: | |
1686 | ieee80211_sta_find_ibss(sdata); | |
1687 | break; | |
1688 | case IEEE80211_IBSS_MLME_JOINED: | |
1689 | ieee80211_sta_merge_ibss(sdata); | |
1690 | break; | |
1691 | default: | |
1692 | WARN_ON(1); | |
1693 | break; | |
1694 | } | |
46900298 | 1695 | |
7a17a33c | 1696 | out: |
8d61ffa5 | 1697 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1698 | } |
1699 | ||
46900298 JB |
1700 | static void ieee80211_ibss_timer(unsigned long data) |
1701 | { | |
1702 | struct ieee80211_sub_if_data *sdata = | |
1703 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 1704 | |
a6182943 | 1705 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
5bb644a0 | 1706 | } |
5bb644a0 | 1707 | |
46900298 JB |
1708 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1709 | { | |
1710 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1711 | ||
46900298 JB |
1712 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
1713 | (unsigned long) sdata); | |
8bf11d8d JB |
1714 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1715 | spin_lock_init(&ifibss->incomplete_lock); | |
cd7760e6 SW |
1716 | INIT_WORK(&ifibss->csa_connection_drop_work, |
1717 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1718 | } |
1719 | ||
1720 | /* scan finished notification */ | |
1721 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1722 | { | |
af8cdcd8 | 1723 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1724 | |
29b4a4f7 JB |
1725 | mutex_lock(&local->iflist_mtx); |
1726 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1727 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1728 | continue; |
af8cdcd8 JB |
1729 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1730 | continue; | |
1731 | sdata->u.ibss.last_scan_completed = jiffies; | |
7a17a33c | 1732 | ieee80211_queue_work(&local->hw, &sdata->work); |
46900298 | 1733 | } |
29b4a4f7 | 1734 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1735 | } |
1736 | ||
af8cdcd8 JB |
1737 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1738 | struct cfg80211_ibss_params *params) | |
1739 | { | |
ff3cc5f4 | 1740 | u32 changed = 0; |
2103dec1 SW |
1741 | u32 rate_flags; |
1742 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1743 | enum ieee80211_chanctx_mode chanmode; |
1744 | struct ieee80211_local *local = sdata->local; | |
1745 | int radar_detect_width = 0; | |
2103dec1 | 1746 | int i; |
71965c1d LC |
1747 | int ret; |
1748 | ||
1749 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1750 | ¶ms->chandef, | |
1751 | sdata->wdev.iftype); | |
1752 | if (ret < 0) | |
1753 | return ret; | |
1754 | ||
1755 | if (ret > 0) { | |
1756 | if (!params->userspace_handles_dfs) | |
1757 | return -EINVAL; | |
1758 | radar_detect_width = BIT(params->chandef.width); | |
1759 | } | |
1760 | ||
1761 | chanmode = (params->channel_fixed && !ret) ? | |
1762 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1763 | ||
1764 | mutex_lock(&local->chanctx_mtx); | |
1765 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1766 | radar_detect_width); | |
1767 | mutex_unlock(&local->chanctx_mtx); | |
1768 | if (ret < 0) | |
1769 | return ret; | |
af8cdcd8 | 1770 | |
af8cdcd8 JB |
1771 | if (params->bssid) { |
1772 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1773 | sdata->u.ibss.fixed_bssid = true; | |
1774 | } else | |
1775 | sdata->u.ibss.fixed_bssid = false; | |
1776 | ||
fffd0934 | 1777 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1778 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1779 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1780 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1781 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1782 | |
1783 | /* fix basic_rates if channel does not support these rates */ | |
1784 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1785 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1786 | for (i = 0; i < sband->n_bitrates; i++) { |
1787 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1788 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1789 | } | |
dd5b4cc7 FF |
1790 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1791 | sizeof(params->mcast_rate)); | |
fffd0934 | 1792 | |
57c4d7b4 JB |
1793 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1794 | ||
3aede78a | 1795 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1796 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1797 | ||
1798 | if (params->ie) { | |
1799 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1800 | GFP_KERNEL); | |
1801 | if (sdata->u.ibss.ie) | |
1802 | sdata->u.ibss.ie_len = params->ie_len; | |
1803 | } | |
1804 | ||
af8cdcd8 JB |
1805 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1806 | sdata->u.ibss.ibss_join_req = jiffies; | |
1807 | ||
badecb00 | 1808 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1809 | sdata->u.ibss.ssid_len = params->ssid_len; |
1810 | ||
822854b0 SW |
1811 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1812 | sizeof(sdata->u.ibss.ht_capa)); | |
1813 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1814 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1815 | ||
ff3cc5f4 SW |
1816 | /* |
1817 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1818 | * reserved, but an HT STA shall protect HT transmissions as though | |
1819 | * the HT Protection field were set to non-HT mixed mode. | |
1820 | * | |
1821 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1822 | * also reserved, but an HT STA shall operate as though this field | |
1823 | * were set to 1. | |
1824 | */ | |
1825 | ||
1826 | sdata->vif.bss_conf.ht_operation_mode |= | |
1827 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1828 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1829 | ||
1830 | changed |= BSS_CHANGED_HT; | |
1831 | ieee80211_bss_info_change_notify(sdata, changed); | |
1832 | ||
04ecd257 | 1833 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
71965c1d | 1834 | sdata->needed_rx_chains = local->rx_chains; |
04ecd257 | 1835 | |
71965c1d | 1836 | ieee80211_queue_work(&local->hw, &sdata->work); |
af8cdcd8 JB |
1837 | |
1838 | return 0; | |
1839 | } | |
1840 | ||
1841 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1842 | { | |
5ea096c0 | 1843 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1844 | |
871a4180 | 1845 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1846 | ifibss->ssid_len = 0; |
c84a67a2 | 1847 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1848 | |
1849 | /* remove beacon */ | |
1850 | kfree(sdata->u.ibss.ie); | |
822854b0 SW |
1851 | |
1852 | /* on the next join, re-program HT parameters */ | |
1853 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1854 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1855 | ||
af8cdcd8 | 1856 | synchronize_rcu(); |
af8cdcd8 | 1857 | |
35f20c14 | 1858 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1859 | |
bc05d19f | 1860 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1861 | |
af8cdcd8 JB |
1862 | return 0; |
1863 | } |