Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
46900298 JB |
2 | /* |
3 | * IBSS mode implementation | |
4 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
5 | * Copyright 2004, Instant802 Networks, Inc. | |
6 | * Copyright 2005, Devicescape Software, Inc. | |
7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
9 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 10 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
d321cd01 | 11 | * Copyright(c) 2016 Intel Deutschland GmbH |
15ddba5f | 12 | * Copyright(c) 2018-2023 Intel Corporation |
46900298 JB |
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, | |
cd7760e6 SW |
42 | bool *have_higher_than_11mbit, |
43 | struct cfg80211_csa_settings *csa_settings) | |
46900298 JB |
44 | { |
45 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46 | struct ieee80211_local *local = sdata->local; | |
2103dec1 | 47 | int rates_n = 0, i, ri; |
46900298 JB |
48 | struct ieee80211_mgmt *mgmt; |
49 | u8 *pos; | |
50 | struct ieee80211_supported_band *sband; | |
d51b70ff | 51 | u32 rate_flags, rates = 0, rates_added = 0; |
c3ffeab4 JB |
52 | struct beacon_data *presp; |
53 | int frame_len; | |
2103dec1 | 54 | int shift; |
24487981 | 55 | |
46900298 | 56 | /* Build IBSS probe response */ |
c3ffeab4 JB |
57 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
58 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
59 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
60 | 2 + 8 /* max Supported Rates */ + | |
61 | 3 /* max DS params */ + | |
62 | 4 /* IBSS params */ + | |
cd7760e6 | 63 | 5 /* Channel Switch Announcement */ + |
c3ffeab4 JB |
64 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
65 | 2 + sizeof(struct ieee80211_ht_cap) + | |
66 | 2 + sizeof(struct ieee80211_ht_operation) + | |
f1f3e9e2 JB |
67 | 2 + sizeof(struct ieee80211_vht_cap) + |
68 | 2 + sizeof(struct ieee80211_vht_operation) + | |
c3ffeab4 JB |
69 | ifibss->ie_len; |
70 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); | |
71 | if (!presp) | |
d51b70ff | 72 | return NULL; |
c3ffeab4 JB |
73 | |
74 | presp->head = (void *)(presp + 1); | |
75 | ||
76 | mgmt = (void *) presp->head; | |
46900298 JB |
77 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
78 | IEEE80211_STYPE_PROBE_RESP); | |
e83e6541 | 79 | eth_broadcast_addr(mgmt->da); |
47846c9b | 80 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 81 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 82 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 83 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
84 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
85 | ||
c3ffeab4 JB |
86 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
87 | ||
46900298 JB |
88 | *pos++ = WLAN_EID_SSID; |
89 | *pos++ = ifibss->ssid_len; | |
90 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
c3ffeab4 | 91 | pos += ifibss->ssid_len; |
46900298 | 92 | |
d51b70ff SW |
93 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
94 | rate_flags = ieee80211_chandef_rate_flags(chandef); | |
95 | shift = ieee80211_chandef_get_shift(chandef); | |
96 | rates_n = 0; | |
97 | if (have_higher_than_11mbit) | |
98 | *have_higher_than_11mbit = false; | |
99 | ||
2103dec1 SW |
100 | for (i = 0; i < sband->n_bitrates; i++) { |
101 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
102 | continue; | |
d51b70ff SW |
103 | if (sband->bitrates[i].bitrate > 110 && |
104 | have_higher_than_11mbit) | |
105 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
106 | |
107 | rates |= BIT(i); | |
108 | rates_n++; | |
109 | } | |
110 | ||
46900298 | 111 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
112 | *pos++ = min_t(int, 8, rates_n); |
113 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
114 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
115 | 5 * (1 << shift)); | |
c3ffeab4 | 116 | u8 basic = 0; |
2103dec1 SW |
117 | if (!(rates & BIT(ri))) |
118 | continue; | |
119 | ||
120 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 121 | basic = 0x80; |
2103dec1 | 122 | *pos++ = basic | (u8) rate; |
93c75786 SW |
123 | if (++rates_added == 8) { |
124 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 125 | break; |
93c75786 | 126 | } |
c3ffeab4 | 127 | } |
46900298 | 128 | |
57fbcce3 | 129 | if (sband->band == NL80211_BAND_2GHZ) { |
46900298 JB |
130 | *pos++ = WLAN_EID_DS_PARAMS; |
131 | *pos++ = 1; | |
d51b70ff SW |
132 | *pos++ = ieee80211_frequency_to_channel( |
133 | chandef->chan->center_freq); | |
46900298 JB |
134 | } |
135 | ||
46900298 JB |
136 | *pos++ = WLAN_EID_IBSS_PARAMS; |
137 | *pos++ = 2; | |
138 | /* FIX: set ATIM window based on scan results */ | |
139 | *pos++ = 0; | |
140 | *pos++ = 0; | |
141 | ||
cd7760e6 SW |
142 | if (csa_settings) { |
143 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
144 | *pos++ = 3; | |
145 | *pos++ = csa_settings->block_tx ? 1 : 0; | |
146 | *pos++ = ieee80211_frequency_to_channel( | |
147 | csa_settings->chandef.chan->center_freq); | |
8552a434 | 148 | presp->cntdwn_counter_offsets[0] = (pos - presp->head); |
cd7760e6 | 149 | *pos++ = csa_settings->count; |
8552a434 | 150 | presp->cntdwn_current_counter = csa_settings->count; |
cd7760e6 SW |
151 | } |
152 | ||
2103dec1 SW |
153 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
154 | if (rates_n > 8) { | |
46900298 | 155 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
156 | *pos++ = rates_n - 8; |
157 | for (; ri < sband->n_bitrates; ri++) { | |
158 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, | |
159 | 5 * (1 << shift)); | |
c3ffeab4 | 160 | u8 basic = 0; |
2103dec1 SW |
161 | if (!(rates & BIT(ri))) |
162 | continue; | |
163 | ||
164 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 165 | basic = 0x80; |
2103dec1 | 166 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 167 | } |
46900298 JB |
168 | } |
169 | ||
c3ffeab4 JB |
170 | if (ifibss->ie_len) { |
171 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
172 | pos += ifibss->ie_len; | |
173 | } | |
af8cdcd8 | 174 | |
13c40c54 | 175 | /* add HT capability and information IEs */ |
d51b70ff SW |
176 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
177 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
178 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 179 | sband->ht_cap.ht_supported) { |
822854b0 SW |
180 | struct ieee80211_sta_ht_cap ht_cap; |
181 | ||
182 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
183 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
184 | ||
185 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
186 | /* |
187 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
188 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
189 | * keep them at 0 | |
190 | */ | |
074d46d1 | 191 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
57f255f5 | 192 | chandef, 0, false); |
abcff6ef JD |
193 | |
194 | /* add VHT capability and information IEs */ | |
195 | if (chandef->width != NL80211_CHAN_WIDTH_20 && | |
196 | chandef->width != NL80211_CHAN_WIDTH_40 && | |
197 | sband->vht_cap.vht_supported) { | |
198 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
199 | sband->vht_cap.cap); | |
200 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, | |
201 | chandef); | |
202 | } | |
13c40c54 AS |
203 | } |
204 | ||
40b861a0 AN |
205 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
206 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 207 | |
c3ffeab4 JB |
208 | presp->head_len = pos - presp->head; |
209 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
210 | goto error; |
211 | ||
212 | return presp; | |
213 | error: | |
214 | kfree(presp); | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
219 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 220 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
221 | const u32 basic_rates, |
222 | const u16 capability, u64 tsf, | |
223 | bool creator) | |
224 | { | |
225 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
226 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
227 | struct ieee80211_mgmt *mgmt; |
228 | struct cfg80211_bss *bss; | |
15ddba5f | 229 | u64 bss_change; |
d51b70ff | 230 | struct cfg80211_chan_def chandef; |
b35c8097 | 231 | struct ieee80211_channel *chan; |
d51b70ff | 232 | struct beacon_data *presp; |
61f6bba0 | 233 | struct cfg80211_inform_bss bss_meta = {}; |
d51b70ff | 234 | bool have_higher_than_11mbit; |
2beb6dab | 235 | bool radar_required; |
55fff501 | 236 | int err; |
d51b70ff SW |
237 | |
238 | sdata_assert_lock(sdata); | |
239 | ||
240 | /* Reset own TSF to allow time synchronization work. */ | |
241 | drv_reset_tsf(local, sdata); | |
242 | ||
243 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
244 | sta_info_flush(sdata); | |
245 | ||
246 | /* if merging, indicate to driver that we leave the old IBSS */ | |
f276e20b JB |
247 | if (sdata->vif.cfg.ibss_joined) { |
248 | sdata->vif.cfg.ibss_joined = false; | |
249 | sdata->vif.cfg.ibss_creator = false; | |
d51b70ff SW |
250 | sdata->vif.bss_conf.enable_beacon = false; |
251 | netif_carrier_off(sdata->dev); | |
252 | ieee80211_bss_info_change_notify(sdata, | |
253 | BSS_CHANGED_IBSS | | |
254 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 255 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
256 | } |
257 | ||
6858ad75 | 258 | presp = sdata_dereference(ifibss->presp, sdata); |
0c2bef46 | 259 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
260 | if (presp) |
261 | kfree_rcu(presp, rcu_head); | |
262 | ||
b35c8097 JL |
263 | /* make a copy of the chandef, it could be modified below. */ |
264 | chandef = *req_chandef; | |
265 | chan = chandef.chan; | |
174e0cd2 IP |
266 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
267 | NL80211_IFTYPE_ADHOC)) { | |
d51b70ff SW |
268 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
269 | chandef.width == NL80211_CHAN_WIDTH_10 || | |
270 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
271 | chandef.width == NL80211_CHAN_WIDTH_20) { | |
272 | sdata_info(sdata, | |
273 | "Failed to join IBSS, beacons forbidden\n"); | |
274 | return; | |
275 | } | |
276 | chandef.width = NL80211_CHAN_WIDTH_20; | |
277 | chandef.center_freq1 = chan->center_freq; | |
8e8d347d | 278 | /* check again for downgraded chandef */ |
174e0cd2 IP |
279 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
280 | NL80211_IFTYPE_ADHOC)) { | |
8e8d347d SW |
281 | sdata_info(sdata, |
282 | "Failed to join IBSS, beacons forbidden\n"); | |
283 | return; | |
284 | } | |
285 | } | |
286 | ||
287 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab | 288 | &chandef, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
289 | if (err < 0) { |
290 | sdata_info(sdata, | |
291 | "Failed to join IBSS, invalid chandef\n"); | |
292 | return; | |
293 | } | |
2beb6dab LC |
294 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
295 | sdata_info(sdata, | |
296 | "Failed to join IBSS, DFS channel without control program\n"); | |
297 | return; | |
d51b70ff SW |
298 | } |
299 | ||
2beb6dab LC |
300 | radar_required = err; |
301 | ||
34a3740d | 302 | mutex_lock(&local->mtx); |
d8675a63 | 303 | if (ieee80211_link_use_channel(&sdata->deflink, &chandef, |
b4f85443 | 304 | ifibss->fixed_channel ? |
d51b70ff SW |
305 | IEEE80211_CHANCTX_SHARED : |
306 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
307 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
34a3740d | 308 | mutex_unlock(&local->mtx); |
d51b70ff SW |
309 | return; |
310 | } | |
bfd8403a | 311 | sdata->deflink.radar_required = radar_required; |
34a3740d | 312 | mutex_unlock(&local->mtx); |
d51b70ff SW |
313 | |
314 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
315 | ||
d51b70ff SW |
316 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
317 | capability, tsf, &chandef, | |
cd7760e6 | 318 | &have_higher_than_11mbit, NULL); |
d51b70ff | 319 | if (!presp) |
c3ffeab4 JB |
320 | return; |
321 | ||
322 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 323 | mgmt = (void *)presp->head; |
46900298 | 324 | |
d6a83228 | 325 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 326 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 327 | sdata->vif.bss_conf.basic_rates = basic_rates; |
f276e20b JB |
328 | sdata->vif.cfg.ssid_len = ifibss->ssid_len; |
329 | memcpy(sdata->vif.cfg.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
330 | bss_change = BSS_CHANGED_BEACON_INT; |
331 | bss_change |= ieee80211_reset_erp_info(sdata); | |
332 | bss_change |= BSS_CHANGED_BSSID; | |
333 | bss_change |= BSS_CHANGED_BEACON; | |
334 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 335 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 336 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 337 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 338 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
339 | |
340 | /* | |
341 | * In 5 GHz/802.11a, we can always use short slot time. | |
342 | * (IEEE 802.11-2012 18.3.8.7) | |
343 | * | |
344 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
345 | * reasons. | |
346 | * (IEEE 802.11-2012 19.4.5) | |
347 | * | |
348 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
349 | */ | |
57fbcce3 | 350 | sdata->vif.bss_conf.use_short_slot = chan->band == NL80211_BAND_5GHZ; |
2f91a967 SW |
351 | bss_change |= BSS_CHANGED_ERP_SLOT; |
352 | ||
2ec9c1f6 | 353 | /* cf. IEEE 802.11 9.2.12 */ |
39eac2de JB |
354 | sdata->deflink.operating_11g_mode = |
355 | chan->band == NL80211_BAND_2GHZ && have_higher_than_11mbit; | |
2ec9c1f6 | 356 | |
b3e2130b | 357 | ieee80211_set_wmm_default(&sdata->deflink, true, false); |
55fff501 | 358 | |
f276e20b JB |
359 | sdata->vif.cfg.ibss_joined = true; |
360 | sdata->vif.cfg.ibss_creator = creator; | |
46900298 | 361 | |
55fff501 JB |
362 | err = drv_join_ibss(local, sdata); |
363 | if (err) { | |
f276e20b JB |
364 | sdata->vif.cfg.ibss_joined = false; |
365 | sdata->vif.cfg.ibss_creator = false; | |
55fff501 | 366 | sdata->vif.bss_conf.enable_beacon = false; |
f276e20b | 367 | sdata->vif.cfg.ssid_len = 0; |
55fff501 JB |
368 | RCU_INIT_POINTER(ifibss->presp, NULL); |
369 | kfree_rcu(presp, rcu_head); | |
34a3740d | 370 | mutex_lock(&local->mtx); |
d8675a63 | 371 | ieee80211_link_release_channel(&sdata->deflink); |
34a3740d | 372 | mutex_unlock(&local->mtx); |
55fff501 JB |
373 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
374 | err); | |
375 | return; | |
376 | } | |
377 | ||
378 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 379 | |
46900298 | 380 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
381 | mod_timer(&ifibss->timer, |
382 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 383 | |
61f6bba0 JB |
384 | bss_meta.chan = chan; |
385 | bss_meta.scan_width = cfg80211_chandef_to_scan_width(&chandef); | |
386 | bss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, | |
387 | presp->head_len, GFP_KERNEL); | |
388 | ||
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, | |
a4ac6f2e | 425 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
426 | chandef.width = sdata->u.ibss.chandef.width; |
427 | break; | |
abcff6ef | 428 | case NL80211_CHAN_WIDTH_80: |
c39b336d | 429 | case NL80211_CHAN_WIDTH_80P80: |
abcff6ef JD |
430 | case NL80211_CHAN_WIDTH_160: |
431 | chandef = sdata->u.ibss.chandef; | |
432 | chandef.chan = cbss->channel; | |
433 | break; | |
75a423f4 SW |
434 | default: |
435 | /* fall back to 20 MHz for unsupported modes */ | |
436 | cfg80211_chandef_create(&chandef, cbss->channel, | |
a4ac6f2e | 437 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
438 | break; |
439 | } | |
440 | ||
0c1ad2ca | 441 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 SW |
442 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
443 | shift = ieee80211_vif_get_shift(&sdata->vif); | |
b59066a2 JB |
444 | |
445 | basic_rates = 0; | |
446 | ||
447 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 448 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
449 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
450 | ||
451 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
452 | int brate; |
453 | if ((rate_flags & sband->bitrates[j].flags) | |
454 | != rate_flags) | |
455 | continue; | |
456 | ||
457 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, | |
458 | 5 * (1 << shift)); | |
459 | if (brate == rate) { | |
b59066a2 JB |
460 | if (is_basic) |
461 | basic_rates |= BIT(j); | |
462 | break; | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
8cef2c9d JB |
467 | rcu_read_lock(); |
468 | ies = rcu_dereference(cbss->ies); | |
469 | tsf = ies->tsf; | |
470 | rcu_read_unlock(); | |
471 | ||
0c1ad2ca | 472 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 473 | beacon_int, |
75a423f4 | 474 | &chandef, |
b59066a2 | 475 | basic_rates, |
0c1ad2ca | 476 | cbss->capability, |
8cef2c9d | 477 | tsf, false); |
46900298 JB |
478 | } |
479 | ||
cd7760e6 | 480 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
15ddba5f A |
481 | struct cfg80211_csa_settings *csa_settings, |
482 | u64 *changed) | |
cd7760e6 SW |
483 | { |
484 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
485 | struct beacon_data *presp, *old_presp; | |
486 | struct cfg80211_bss *cbss; | |
487 | const struct cfg80211_bss_ies *ies; | |
f181d6a3 | 488 | u16 capability = WLAN_CAPABILITY_IBSS; |
cd7760e6 | 489 | u64 tsf; |
cd7760e6 SW |
490 | |
491 | sdata_assert_lock(sdata); | |
492 | ||
cd7760e6 | 493 | if (ifibss->privacy) |
f181d6a3 | 494 | capability |= WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
495 | |
496 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
497 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
498 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
499 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 | 500 | |
0323689d | 501 | if (WARN_ON(!cbss)) |
502 | return -EINVAL; | |
cd7760e6 SW |
503 | |
504 | rcu_read_lock(); | |
505 | ies = rcu_dereference(cbss->ies); | |
506 | tsf = ies->tsf; | |
507 | rcu_read_unlock(); | |
508 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
509 | ||
6858ad75 | 510 | old_presp = sdata_dereference(ifibss->presp, sdata); |
cd7760e6 SW |
511 | |
512 | presp = ieee80211_ibss_build_presp(sdata, | |
513 | sdata->vif.bss_conf.beacon_int, | |
514 | sdata->vif.bss_conf.basic_rates, | |
515 | capability, tsf, &ifibss->chandef, | |
516 | NULL, csa_settings); | |
0323689d | 517 | if (!presp) |
518 | return -ENOMEM; | |
cd7760e6 SW |
519 | |
520 | rcu_assign_pointer(ifibss->presp, presp); | |
521 | if (old_presp) | |
522 | kfree_rcu(old_presp, rcu_head); | |
523 | ||
15ddba5f A |
524 | *changed |= BSS_CHANGED_BEACON; |
525 | return 0; | |
cd7760e6 SW |
526 | } |
527 | ||
15ddba5f | 528 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) |
cd7760e6 SW |
529 | { |
530 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
531 | struct cfg80211_bss *cbss; | |
cd7760e6 | 532 | |
bafdc614 SW |
533 | sdata_assert_lock(sdata); |
534 | ||
15bc8966 SRP |
535 | /* When not connected/joined, sending CSA doesn't make sense. */ |
536 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED) | |
537 | return -ENOLINK; | |
538 | ||
cd7760e6 SW |
539 | /* update cfg80211 bss information with the new channel */ |
540 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
541 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
542 | ifibss->chandef.chan, | |
543 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
544 | ifibss->ssid_len, |
545 | IEEE80211_BSS_TYPE_IBSS, | |
546 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
547 | /* XXX: should not really modify cfg80211 data */ |
548 | if (cbss) { | |
bfd8403a | 549 | cbss->channel = sdata->deflink.csa_chandef.chan; |
cd7760e6 SW |
550 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
551 | } | |
552 | } | |
553 | ||
bfd8403a | 554 | ifibss->chandef = sdata->deflink.csa_chandef; |
cd7760e6 SW |
555 | |
556 | /* generate the beacon */ | |
15ddba5f | 557 | return ieee80211_ibss_csa_beacon(sdata, NULL, changed); |
cd7760e6 SW |
558 | } |
559 | ||
560 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
561 | { | |
562 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
563 | ||
87351d09 JB |
564 | wiphy_work_cancel(sdata->local->hw.wiphy, |
565 | &ifibss->csa_connection_drop_work); | |
cd7760e6 SW |
566 | } |
567 | ||
52874a5e | 568 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
569 | __acquires(RCU) |
570 | { | |
571 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
572 | u8 addr[ETH_ALEN]; | |
573 | ||
574 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
575 | ||
bdcbd8e0 | 576 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 577 | |
83d5cc01 JB |
578 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
579 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
580 | /* authorize the station only if the network is not RSN protected. If |
581 | * not wait for the userspace to authorize it */ | |
582 | if (!sta->sdata->u.ibss.control_port) | |
583 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
584 | |
585 | rate_control_rate_init(sta); | |
586 | ||
587 | /* If it fails, maybe we raced another insertion? */ | |
588 | if (sta_info_insert_rcu(sta)) | |
589 | return sta_info_get(sdata, addr); | |
590 | return sta; | |
591 | } | |
592 | ||
593 | static struct sta_info * | |
52874a5e AQ |
594 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
595 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
596 | __acquires(RCU) |
597 | { | |
598 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
599 | struct ieee80211_local *local = sdata->local; | |
600 | struct sta_info *sta; | |
55de908a | 601 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 602 | struct ieee80211_supported_band *sband; |
74608aca | 603 | enum nl80211_bss_scan_width scan_width; |
55de908a | 604 | int band; |
8bf11d8d JB |
605 | |
606 | /* | |
607 | * XXX: Consider removing the least recently used entry and | |
608 | * allow new one to be added. | |
609 | */ | |
610 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 611 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 612 | sdata->name, addr); |
8bf11d8d JB |
613 | rcu_read_lock(); |
614 | return NULL; | |
615 | } | |
616 | ||
617 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
618 | rcu_read_lock(); | |
619 | return NULL; | |
620 | } | |
621 | ||
b203ca39 | 622 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
623 | rcu_read_lock(); |
624 | return NULL; | |
625 | } | |
626 | ||
55de908a | 627 | rcu_read_lock(); |
d0a9123e | 628 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
629 | if (WARN_ON_ONCE(!chanctx_conf)) |
630 | return NULL; | |
4bf88530 | 631 | band = chanctx_conf->def.chan->band; |
74608aca | 632 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
633 | rcu_read_unlock(); |
634 | ||
f36fe0a2 | 635 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
8bf11d8d JB |
636 | if (!sta) { |
637 | rcu_read_lock(); | |
638 | return NULL; | |
639 | } | |
640 | ||
8bf11d8d | 641 | /* make sure mandatory rates are always added */ |
b422c6cd | 642 | sband = local->hw.wiphy->bands[band]; |
046d2e7c | 643 | sta->sta.deflink.supp_rates[band] = supp_rates | |
74608aca | 644 | ieee80211_mandatory_rates(sband, scan_width); |
8bf11d8d | 645 | |
52874a5e | 646 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
647 | } |
648 | ||
871a4180 SW |
649 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
650 | { | |
651 | struct ieee80211_local *local = sdata->local; | |
652 | int active = 0; | |
653 | struct sta_info *sta; | |
654 | ||
655 | sdata_assert_lock(sdata); | |
656 | ||
657 | rcu_read_lock(); | |
658 | ||
659 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
b8da6b6a JB |
660 | unsigned long last_active = ieee80211_sta_last_active(sta); |
661 | ||
871a4180 | 662 | if (sta->sdata == sdata && |
b8da6b6a JB |
663 | time_is_after_jiffies(last_active + |
664 | IEEE80211_IBSS_MERGE_INTERVAL)) { | |
871a4180 SW |
665 | active++; |
666 | break; | |
667 | } | |
668 | } | |
669 | ||
670 | rcu_read_unlock(); | |
671 | ||
672 | return active; | |
673 | } | |
674 | ||
675 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
676 | { | |
677 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
678 | struct ieee80211_local *local = sdata->local; | |
679 | struct cfg80211_bss *cbss; | |
680 | struct beacon_data *presp; | |
681 | struct sta_info *sta; | |
871a4180 | 682 | |
d4c80d9d | 683 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
684 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
685 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
686 | ifibss->ssid_len, |
687 | IEEE80211_BSS_TYPE_IBSS, | |
688 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
689 | |
690 | if (cbss) { | |
691 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
692 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
693 | } | |
694 | } | |
695 | ||
696 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
697 | ||
698 | sta_info_flush(sdata); | |
699 | ||
700 | spin_lock_bh(&ifibss->incomplete_lock); | |
701 | while (!list_empty(&ifibss->incomplete_stations)) { | |
702 | sta = list_first_entry(&ifibss->incomplete_stations, | |
703 | struct sta_info, list); | |
704 | list_del(&sta->list); | |
705 | spin_unlock_bh(&ifibss->incomplete_lock); | |
706 | ||
707 | sta_info_free(local, sta); | |
708 | spin_lock_bh(&ifibss->incomplete_lock); | |
709 | } | |
710 | spin_unlock_bh(&ifibss->incomplete_lock); | |
711 | ||
712 | netif_carrier_off(sdata->dev); | |
713 | ||
f276e20b JB |
714 | sdata->vif.cfg.ibss_joined = false; |
715 | sdata->vif.cfg.ibss_creator = false; | |
871a4180 | 716 | sdata->vif.bss_conf.enable_beacon = false; |
f276e20b | 717 | sdata->vif.cfg.ssid_len = 0; |
871a4180 SW |
718 | |
719 | /* remove beacon */ | |
6858ad75 | 720 | presp = sdata_dereference(ifibss->presp, sdata); |
871a4180 SW |
721 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
722 | if (presp) | |
723 | kfree_rcu(presp, rcu_head); | |
724 | ||
725 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
726 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
727 | BSS_CHANGED_IBSS); | |
55fff501 | 728 | drv_leave_ibss(local, sdata); |
34a3740d | 729 | mutex_lock(&local->mtx); |
d8675a63 | 730 | ieee80211_link_release_channel(&sdata->deflink); |
34a3740d | 731 | mutex_unlock(&local->mtx); |
871a4180 SW |
732 | } |
733 | ||
87351d09 JB |
734 | static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, |
735 | struct wiphy_work *work) | |
cd7760e6 SW |
736 | { |
737 | struct ieee80211_sub_if_data *sdata = | |
738 | container_of(work, struct ieee80211_sub_if_data, | |
739 | u.ibss.csa_connection_drop_work); | |
740 | ||
6f07d216 LC |
741 | sdata_lock(sdata); |
742 | ||
cd7760e6 SW |
743 | ieee80211_ibss_disconnect(sdata); |
744 | synchronize_rcu(); | |
745 | skb_queue_purge(&sdata->skb_queue); | |
746 | ||
747 | /* trigger a scan to find another IBSS network to join */ | |
16114496 | 748 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
6f07d216 LC |
749 | |
750 | sdata_unlock(sdata); | |
cd7760e6 SW |
751 | } |
752 | ||
8e8d347d SW |
753 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
754 | { | |
755 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
756 | int err; | |
757 | ||
758 | /* if the current channel is a DFS channel, mark the channel as | |
759 | * unavailable. | |
760 | */ | |
761 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
762 | &ifibss->chandef, |
763 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
764 | if (err > 0) |
765 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
766 | GFP_ATOMIC); | |
767 | } | |
768 | ||
cd7760e6 SW |
769 | static bool |
770 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
771 | struct ieee802_11_elems *elems, | |
772 | bool beacon) | |
773 | { | |
774 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 775 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 776 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 777 | enum nl80211_channel_type ch_type; |
82a8e17d | 778 | int err; |
ba323e29 | 779 | ieee80211_conn_flags_t conn_flags; |
2a333a0d | 780 | u32 vht_cap_info = 0; |
cd7760e6 | 781 | |
dbd72850 MK |
782 | sdata_assert_lock(sdata); |
783 | ||
ba323e29 JB |
784 | conn_flags = IEEE80211_CONN_DISABLE_VHT; |
785 | ||
cd7760e6 SW |
786 | switch (ifibss->chandef.width) { |
787 | case NL80211_CHAN_WIDTH_5: | |
788 | case NL80211_CHAN_WIDTH_10: | |
789 | case NL80211_CHAN_WIDTH_20_NOHT: | |
ba323e29 | 790 | conn_flags |= IEEE80211_CONN_DISABLE_HT; |
fc0561dc | 791 | fallthrough; |
cd7760e6 | 792 | case NL80211_CHAN_WIDTH_20: |
ba323e29 | 793 | conn_flags |= IEEE80211_CONN_DISABLE_40MHZ; |
cd7760e6 SW |
794 | break; |
795 | default: | |
796 | break; | |
797 | } | |
798 | ||
2a333a0d JB |
799 | if (elems->vht_cap_elem) |
800 | vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); | |
801 | ||
cd7760e6 | 802 | memset(¶ms, 0, sizeof(params)); |
84469a45 | 803 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 804 | ifibss->chandef.chan->band, |
2a333a0d | 805 | vht_cap_info, |
ba323e29 | 806 | conn_flags, ifibss->bssid, &csa_ie); |
cd7760e6 SW |
807 | /* can't switch to destination channel, fail */ |
808 | if (err < 0) | |
809 | goto disconnect; | |
810 | ||
811 | /* did not contain a CSA */ | |
812 | if (err) | |
813 | return false; | |
814 | ||
0834ae3c SW |
815 | /* channel switch is not supported, disconnect */ |
816 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
817 | goto disconnect; | |
818 | ||
c0f17eb9 CYY |
819 | params.count = csa_ie.count; |
820 | params.chandef = csa_ie.chandef; | |
821 | ||
cd7760e6 SW |
822 | switch (ifibss->chandef.width) { |
823 | case NL80211_CHAN_WIDTH_20_NOHT: | |
824 | case NL80211_CHAN_WIDTH_20: | |
825 | case NL80211_CHAN_WIDTH_40: | |
826 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
827 | * another mode has been announced. The mode is not adopted | |
828 | * within the beacon while doing CSA and we should therefore | |
829 | * keep the mode which we announce. | |
830 | */ | |
831 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
832 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
833 | ch_type); | |
834 | break; | |
835 | case NL80211_CHAN_WIDTH_5: | |
836 | case NL80211_CHAN_WIDTH_10: | |
837 | if (params.chandef.width != ifibss->chandef.width) { | |
838 | sdata_info(sdata, | |
839 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
840 | ifibss->bssid, | |
841 | params.chandef.chan->center_freq, | |
842 | params.chandef.width, | |
843 | params.chandef.center_freq1, | |
844 | params.chandef.center_freq2); | |
845 | goto disconnect; | |
846 | } | |
847 | break; | |
848 | default: | |
ba323e29 | 849 | /* should not happen, conn_flags should prevent VHT modes. */ |
cd7760e6 SW |
850 | WARN_ON(1); |
851 | goto disconnect; | |
852 | } | |
853 | ||
174e0cd2 IP |
854 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
855 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
856 | sdata_info(sdata, |
857 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
858 | ifibss->bssid, | |
859 | params.chandef.chan->center_freq, | |
860 | params.chandef.width, | |
861 | params.chandef.center_freq1, | |
862 | params.chandef.center_freq2); | |
863 | goto disconnect; | |
864 | } | |
865 | ||
866 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
867 | ¶ms.chandef, |
868 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
869 | if (err < 0) |
870 | goto disconnect; | |
2beb6dab | 871 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 872 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 873 | goto disconnect; |
cd7760e6 SW |
874 | } |
875 | ||
2beb6dab LC |
876 | params.radar_required = err; |
877 | ||
82a8e17d LC |
878 | if (cfg80211_chandef_identical(¶ms.chandef, |
879 | &sdata->vif.bss_conf.chandef)) { | |
880 | ibss_dbg(sdata, | |
881 | "received csa with an identical chandef, ignoring\n"); | |
882 | return true; | |
cd7760e6 | 883 | } |
cd7760e6 SW |
884 | |
885 | /* all checks done, now perform the channel switch. */ | |
886 | ibss_dbg(sdata, | |
887 | "received channel switch announcement to go to channel %d MHz\n", | |
888 | params.chandef.chan->center_freq); | |
889 | ||
c0f17eb9 | 890 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 891 | |
82a8e17d LC |
892 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
893 | ¶ms)) | |
894 | goto disconnect; | |
cd7760e6 | 895 | |
8e8d347d SW |
896 | ieee80211_ibss_csa_mark_radar(sdata); |
897 | ||
cd7760e6 SW |
898 | return true; |
899 | disconnect: | |
900 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
87351d09 JB |
901 | wiphy_work_queue(sdata->local->hw.wiphy, |
902 | &ifibss->csa_connection_drop_work); | |
cd7760e6 | 903 | |
8e8d347d SW |
904 | ieee80211_ibss_csa_mark_radar(sdata); |
905 | ||
cd7760e6 SW |
906 | return true; |
907 | } | |
908 | ||
909 | static void | |
910 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
911 | struct ieee80211_mgmt *mgmt, size_t len, | |
912 | struct ieee80211_rx_status *rx_status, | |
913 | struct ieee802_11_elems *elems) | |
914 | { | |
915 | int required_len; | |
916 | ||
917 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
918 | return; | |
919 | ||
920 | /* CSA is the only action we handle for now */ | |
921 | if (mgmt->u.action.u.measurement.action_code != | |
922 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
923 | return; | |
924 | ||
925 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
926 | sizeof(mgmt->u.action.u.chan_switch); | |
927 | if (len < required_len) | |
928 | return; | |
929 | ||
d0a9123e | 930 | if (!sdata->vif.bss_conf.csa_active) |
82a8e17d | 931 | ieee80211_ibss_process_chanswitch(sdata, elems, false); |
cd7760e6 SW |
932 | } |
933 | ||
2cc59e78 AQ |
934 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
935 | struct ieee80211_mgmt *mgmt, | |
936 | size_t len) | |
937 | { | |
938 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
939 | ||
940 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
941 | return; | |
942 | ||
c6e57b38 EG |
943 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
944 | ibss_dbg(sdata, "\tBSSID=%pM (reason: %d)\n", mgmt->bssid, reason); | |
2cc59e78 AQ |
945 | sta_info_destroy_addr(sdata, mgmt->sa); |
946 | } | |
947 | ||
6d810f10 AQ |
948 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
949 | struct ieee80211_mgmt *mgmt, | |
950 | size_t len) | |
951 | { | |
952 | u16 auth_alg, auth_transaction; | |
953 | ||
8d61ffa5 | 954 | sdata_assert_lock(sdata); |
6d810f10 AQ |
955 | |
956 | if (len < 24 + 6) | |
957 | return; | |
958 | ||
959 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
960 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
961 | ||
c6e57b38 EG |
962 | ibss_dbg(sdata, "RX Auth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
963 | ibss_dbg(sdata, "\tBSSID=%pM (auth_transaction=%d)\n", | |
964 | mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
965 | |
966 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
967 | return; | |
968 | ||
6d810f10 AQ |
969 | /* |
970 | * IEEE 802.11 standard does not require authentication in IBSS | |
971 | * networks and most implementations do not seem to use it. | |
972 | * However, try to reply to authentication attempts if someone | |
973 | * has actually implemented this. | |
974 | */ | |
700e8ea6 | 975 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 976 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
977 | } |
978 | ||
8a4988d1 JD |
979 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
980 | struct ieee80211_mgmt *mgmt, size_t len, | |
981 | struct ieee80211_rx_status *rx_status, | |
982 | struct ieee802_11_elems *elems, | |
983 | struct ieee80211_channel *channel) | |
46900298 | 984 | { |
46900298 | 985 | struct sta_info *sta; |
57fbcce3 | 986 | enum nl80211_band band = rx_status->band; |
74608aca | 987 | enum nl80211_bss_scan_width scan_width; |
8a4988d1 | 988 | struct ieee80211_local *local = sdata->local; |
21a8e9dd | 989 | struct ieee80211_supported_band *sband; |
13c40c54 | 990 | bool rates_updated = false; |
8a4988d1 | 991 | u32 supp_rates = 0; |
46900298 | 992 | |
8a4988d1 | 993 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
994 | return; |
995 | ||
8a4988d1 JD |
996 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
997 | return; | |
46900298 | 998 | |
21a8e9dd MSS |
999 | sband = local->hw.wiphy->bands[band]; |
1000 | if (WARN_ON(!sband)) | |
1001 | return; | |
1002 | ||
8a4988d1 JD |
1003 | rcu_read_lock(); |
1004 | sta = sta_info_get(sdata, mgmt->sa); | |
1005 | ||
1006 | if (elems->supp_rates) { | |
1007 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
1008 | band, NULL); | |
1009 | if (sta) { | |
1010 | u32 prev_rates; | |
1011 | ||
046d2e7c | 1012 | prev_rates = sta->sta.deflink.supp_rates[band]; |
8a4988d1 JD |
1013 | /* make sure mandatory rates are always added */ |
1014 | scan_width = NL80211_BSS_CHAN_WIDTH_20; | |
da6a4352 | 1015 | if (rx_status->bw == RATE_INFO_BW_5) |
8a4988d1 | 1016 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
da6a4352 | 1017 | else if (rx_status->bw == RATE_INFO_BW_10) |
8a4988d1 JD |
1018 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
1019 | ||
046d2e7c | 1020 | sta->sta.deflink.supp_rates[band] = supp_rates | |
8a4988d1 | 1021 | ieee80211_mandatory_rates(sband, scan_width); |
046d2e7c | 1022 | if (sta->sta.deflink.supp_rates[band] != prev_rates) { |
8a4988d1 JD |
1023 | ibss_dbg(sdata, |
1024 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1025 | sta->sta.addr, prev_rates, | |
046d2e7c | 1026 | sta->sta.deflink.supp_rates[band]); |
8a4988d1 | 1027 | rates_updated = true; |
8bf11d8d | 1028 | } |
8a4988d1 JD |
1029 | } else { |
1030 | rcu_read_unlock(); | |
1031 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1032 | mgmt->sa, supp_rates); | |
34e89507 | 1033 | } |
8a4988d1 | 1034 | } |
9eba6125 | 1035 | |
96a4688e | 1036 | if (sta && !sta->sta.wme && |
1d00ce80 TP |
1037 | (elems->wmm_info || elems->s1g_capab) && |
1038 | local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1039 | sta->sta.wme = true; |
96a4688e JB |
1040 | ieee80211_check_fast_xmit(sta); |
1041 | } | |
13c40c54 | 1042 | |
8a4988d1 JD |
1043 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1044 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1045 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1046 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1047 | /* we both use HT */ | |
1048 | struct ieee80211_ht_cap htcap_ie; | |
1049 | struct cfg80211_chan_def chandef; | |
046d2e7c | 1050 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.deflink.bandwidth; |
d2954457 | 1051 | |
8ac3c704 JB |
1052 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
1053 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); | |
d2954457 | 1054 | |
8a4988d1 | 1055 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1056 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1057 | &htcap_ie, | |
c71420db | 1058 | &sta->deflink); |
abcff6ef JD |
1059 | |
1060 | if (elems->vht_operation && elems->vht_cap_elem && | |
1061 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1062 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1063 | /* we both use VHT */ | |
1064 | struct ieee80211_vht_cap cap_ie; | |
046d2e7c | 1065 | struct ieee80211_sta_vht_cap cap = sta->sta.deflink.vht_cap; |
2a333a0d JB |
1066 | u32 vht_cap_info = |
1067 | le32_to_cpu(elems->vht_cap_elem->vht_cap_info); | |
abcff6ef | 1068 | |
2a333a0d | 1069 | ieee80211_chandef_vht_oper(&local->hw, vht_cap_info, |
7eb26df2 JB |
1070 | elems->vht_operation, |
1071 | elems->ht_operation, | |
8ac3c704 | 1072 | &chandef); |
abcff6ef JD |
1073 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
1074 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
c71420db JB |
1075 | &cap_ie, |
1076 | &sta->deflink); | |
046d2e7c | 1077 | if (memcmp(&cap, &sta->sta.deflink.vht_cap, sizeof(cap))) |
abcff6ef | 1078 | rates_updated |= true; |
13c40c54 AS |
1079 | } |
1080 | ||
046d2e7c | 1081 | if (bw != sta->sta.deflink.bandwidth) |
abcff6ef | 1082 | rates_updated |= true; |
d2954457 | 1083 | |
abcff6ef JD |
1084 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1085 | &chandef)) | |
1086 | WARN_ON_ONCE(1); | |
8a4988d1 | 1087 | } |
d2954457 | 1088 | |
8a4988d1 JD |
1089 | if (sta && rates_updated) { |
1090 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
046d2e7c | 1091 | u8 rx_nss = sta->sta.deflink.rx_nss; |
13c40c54 | 1092 | |
8a4988d1 | 1093 | /* Force rx_nss recalculation */ |
046d2e7c | 1094 | sta->sta.deflink.rx_nss = 0; |
8a4988d1 | 1095 | rate_control_rate_init(sta); |
046d2e7c | 1096 | if (sta->sta.deflink.rx_nss != rx_nss) |
8a4988d1 | 1097 | changed |= IEEE80211_RC_NSS_CHANGED; |
13c40c54 | 1098 | |
8a4988d1 | 1099 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1100 | } |
1101 | ||
8a4988d1 JD |
1102 | rcu_read_unlock(); |
1103 | } | |
1104 | ||
1105 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1106 | struct ieee80211_mgmt *mgmt, size_t len, | |
1107 | struct ieee80211_rx_status *rx_status, | |
1108 | struct ieee802_11_elems *elems) | |
1109 | { | |
1110 | struct ieee80211_local *local = sdata->local; | |
1111 | struct cfg80211_bss *cbss; | |
1112 | struct ieee80211_bss *bss; | |
1113 | struct ieee80211_channel *channel; | |
1114 | u64 beacon_timestamp, rx_timestamp; | |
1115 | u32 supp_rates = 0; | |
57fbcce3 | 1116 | enum nl80211_band band = rx_status->band; |
8a4988d1 JD |
1117 | |
1118 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1119 | if (!channel) | |
1120 | return; | |
1121 | ||
1122 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1123 | ||
4abb52a4 | 1124 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); |
46900298 JB |
1125 | if (!bss) |
1126 | return; | |
1127 | ||
0c1ad2ca JB |
1128 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1129 | ||
8cef2c9d JB |
1130 | /* same for beacon and probe response */ |
1131 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1132 | |
1133 | /* check if we need to merge IBSS */ | |
1134 | ||
46900298 | 1135 | /* not an IBSS */ |
0c1ad2ca | 1136 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1137 | goto put_bss; |
1138 | ||
1139 | /* different channel */ | |
55de908a | 1140 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1141 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1142 | goto put_bss; |
1143 | ||
1144 | /* different SSID */ | |
1145 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1146 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1147 | sdata->u.ibss.ssid_len)) | |
1148 | goto put_bss; | |
1149 | ||
cd7760e6 | 1150 | /* process channel switch */ |
d0a9123e | 1151 | if (sdata->vif.bss_conf.csa_active || |
82a8e17d | 1152 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) |
cd7760e6 SW |
1153 | goto put_bss; |
1154 | ||
34e8f082 | 1155 | /* same BSSID */ |
b203ca39 | 1156 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1157 | goto put_bss; |
1158 | ||
cd7760e6 SW |
1159 | /* we use a fixed BSSID */ |
1160 | if (sdata->u.ibss.fixed_bssid) | |
1161 | goto put_bss; | |
1162 | ||
f4bda337 TP |
1163 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1164 | /* time when timestamp field was received */ | |
1165 | rx_timestamp = | |
1166 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1167 | len + FCS_LEN, 24); | |
24487981 JB |
1168 | } else { |
1169 | /* | |
1170 | * second best option: get current TSF | |
1171 | * (will return -1 if not supported) | |
1172 | */ | |
37a41b4a | 1173 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1174 | } |
46900298 | 1175 | |
c6e57b38 | 1176 | ibss_dbg(sdata, "RX beacon SA=%pM BSSID=%pM TSF=0x%llx\n", |
bdcbd8e0 | 1177 | mgmt->sa, mgmt->bssid, |
c6e57b38 EG |
1178 | (unsigned long long)rx_timestamp); |
1179 | ibss_dbg(sdata, "\tBCN=0x%llx diff=%lld @%lu\n", | |
bdcbd8e0 JB |
1180 | (unsigned long long)beacon_timestamp, |
1181 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1182 | jiffies); | |
46900298 JB |
1183 | |
1184 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1185 | ibss_dbg(sdata, |
1186 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1187 | mgmt->bssid); | |
46900298 | 1188 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1189 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1190 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1191 | supp_rates); |
8bf11d8d | 1192 | rcu_read_unlock(); |
46900298 JB |
1193 | } |
1194 | ||
1195 | put_bss: | |
1196 | ieee80211_rx_bss_put(local, bss); | |
1197 | } | |
1198 | ||
8bf11d8d JB |
1199 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1200 | const u8 *bssid, const u8 *addr, | |
1201 | u32 supp_rates) | |
46900298 | 1202 | { |
2e10d330 | 1203 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1204 | struct ieee80211_local *local = sdata->local; |
1205 | struct sta_info *sta; | |
55de908a | 1206 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1207 | struct ieee80211_supported_band *sband; |
74608aca | 1208 | enum nl80211_bss_scan_width scan_width; |
55de908a | 1209 | int band; |
46900298 | 1210 | |
af8cdcd8 JB |
1211 | /* |
1212 | * XXX: Consider removing the least recently used entry and | |
1213 | * allow new one to be added. | |
1214 | */ | |
46900298 | 1215 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1216 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1217 | sdata->name, addr); |
8bf11d8d | 1218 | return; |
46900298 JB |
1219 | } |
1220 | ||
2e10d330 | 1221 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1222 | return; |
2e10d330 | 1223 | |
b203ca39 | 1224 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1225 | return; |
46900298 | 1226 | |
55de908a | 1227 | rcu_read_lock(); |
d0a9123e | 1228 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
1229 | if (WARN_ON_ONCE(!chanctx_conf)) { |
1230 | rcu_read_unlock(); | |
1231 | return; | |
1232 | } | |
4bf88530 | 1233 | band = chanctx_conf->def.chan->band; |
74608aca | 1234 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
55de908a JB |
1235 | rcu_read_unlock(); |
1236 | ||
f36fe0a2 | 1237 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1238 | if (!sta) |
8bf11d8d | 1239 | return; |
46900298 | 1240 | |
46900298 | 1241 | /* make sure mandatory rates are always added */ |
b422c6cd | 1242 | sband = local->hw.wiphy->bands[band]; |
046d2e7c | 1243 | sta->sta.deflink.supp_rates[band] = supp_rates | |
74608aca | 1244 | ieee80211_mandatory_rates(sband, scan_width); |
46900298 | 1245 | |
8bf11d8d JB |
1246 | spin_lock(&ifibss->incomplete_lock); |
1247 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1248 | spin_unlock(&ifibss->incomplete_lock); | |
16114496 | 1249 | wiphy_work_queue(local->hw.wiphy, &sdata->work); |
46900298 JB |
1250 | } |
1251 | ||
dad9defd AQ |
1252 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1253 | { | |
4b08d1b6 | 1254 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
dad9defd AQ |
1255 | struct ieee80211_local *local = sdata->local; |
1256 | struct sta_info *sta, *tmp; | |
1257 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
e5a9f8d0 | 1258 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
dad9defd AQ |
1259 | |
1260 | mutex_lock(&local->sta_mtx); | |
1261 | ||
1262 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
b8da6b6a JB |
1263 | unsigned long last_active = ieee80211_sta_last_active(sta); |
1264 | ||
dad9defd AQ |
1265 | if (sdata != sta->sdata) |
1266 | continue; | |
1267 | ||
b8da6b6a JB |
1268 | if (time_is_before_jiffies(last_active + exp_time) || |
1269 | (time_is_before_jiffies(last_active + exp_rsn) && | |
dad9defd | 1270 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
4b08d1b6 JB |
1271 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
1272 | ||
dad9defd AQ |
1273 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
1274 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1275 | "not authorized " : "", sta->sta.addr); | |
1276 | ||
4b08d1b6 JB |
1277 | ieee80211_send_deauth_disassoc(sdata, sta->sta.addr, |
1278 | ifibss->bssid, | |
1279 | IEEE80211_STYPE_DEAUTH, | |
1280 | WLAN_REASON_DEAUTH_LEAVING, | |
1281 | true, frame_buf); | |
dad9defd AQ |
1282 | WARN_ON(__sta_info_destroy(sta)); |
1283 | } | |
1284 | } | |
1285 | ||
1286 | mutex_unlock(&local->sta_mtx); | |
1287 | } | |
1288 | ||
ce9058ae BP |
1289 | /* |
1290 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1291 | */ | |
46900298 JB |
1292 | |
1293 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1294 | { | |
1295 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
7ca15a0a | 1296 | enum nl80211_bss_scan_width scan_width; |
46900298 | 1297 | |
8d61ffa5 | 1298 | sdata_assert_lock(sdata); |
7a17a33c | 1299 | |
af8cdcd8 JB |
1300 | mod_timer(&ifibss->timer, |
1301 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1302 | |
dad9defd | 1303 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1304 | |
450aae3d S |
1305 | if (time_before(jiffies, ifibss->last_scan_completed + |
1306 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1307 | return; | |
1308 | ||
46900298 JB |
1309 | if (ieee80211_sta_active_ibss(sdata)) |
1310 | return; | |
1311 | ||
c037b836 | 1312 | if (ifibss->fixed_channel) |
46900298 JB |
1313 | return; |
1314 | ||
bdcbd8e0 JB |
1315 | sdata_info(sdata, |
1316 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1317 | |
7ca15a0a | 1318 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
34bcf715 | 1319 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
76bed0f4 | 1320 | NULL, 0, scan_width); |
46900298 JB |
1321 | } |
1322 | ||
af8cdcd8 | 1323 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1324 | { |
1325 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1326 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1327 | u16 capability; |
1328 | int i; | |
1329 | ||
8d61ffa5 | 1330 | sdata_assert_lock(sdata); |
7a17a33c | 1331 | |
af8cdcd8 | 1332 | if (ifibss->fixed_bssid) { |
46900298 JB |
1333 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1334 | } else { | |
1335 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1336 | * own MAC address to make sure that devices that do not have proper | |
1337 | * random number generator get different BSSID. */ | |
1338 | get_random_bytes(bssid, ETH_ALEN); | |
1339 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1340 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1341 | bssid[0] &= ~0x01; |
1342 | bssid[0] |= 0x02; | |
1343 | } | |
1344 | ||
bdcbd8e0 | 1345 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1346 | |
46900298 JB |
1347 | capability = WLAN_CAPABILITY_IBSS; |
1348 | ||
fffd0934 | 1349 | if (ifibss->privacy) |
46900298 | 1350 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1351 | |
57c4d7b4 | 1352 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1353 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1354 | capability, 0, true); |
46900298 JB |
1355 | } |
1356 | ||
be50baa4 XG |
1357 | static unsigned int ibss_setup_channels(struct wiphy *wiphy, |
1358 | struct ieee80211_channel **channels, | |
1359 | unsigned int channels_max, | |
1360 | u32 center_freq, u32 width) | |
76bed0f4 JD |
1361 | { |
1362 | struct ieee80211_channel *chan = NULL; | |
1363 | unsigned int n_chan = 0; | |
1364 | u32 start_freq, end_freq, freq; | |
1365 | ||
1366 | if (width <= 20) { | |
1367 | start_freq = center_freq; | |
1368 | end_freq = center_freq; | |
1369 | } else { | |
1370 | start_freq = center_freq - width / 2 + 10; | |
1371 | end_freq = center_freq + width / 2 - 10; | |
1372 | } | |
1373 | ||
1374 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1375 | chan = ieee80211_get_channel(wiphy, freq); | |
1376 | if (!chan) | |
1377 | continue; | |
1378 | if (n_chan >= channels_max) | |
1379 | return n_chan; | |
1380 | ||
1381 | channels[n_chan] = chan; | |
1382 | n_chan++; | |
1383 | } | |
1384 | ||
1385 | return n_chan; | |
1386 | } | |
1387 | ||
1388 | static unsigned int | |
1389 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1390 | const struct cfg80211_chan_def *chandef, | |
1391 | struct ieee80211_channel **channels, | |
1392 | unsigned int channels_max) | |
1393 | { | |
1394 | unsigned int n_chan = 0; | |
1395 | u32 width, cf1, cf2 = 0; | |
1396 | ||
1397 | switch (chandef->width) { | |
1398 | case NL80211_CHAN_WIDTH_40: | |
1399 | width = 40; | |
1400 | break; | |
1401 | case NL80211_CHAN_WIDTH_80P80: | |
1402 | cf2 = chandef->center_freq2; | |
fc0561dc | 1403 | fallthrough; |
76bed0f4 JD |
1404 | case NL80211_CHAN_WIDTH_80: |
1405 | width = 80; | |
1406 | break; | |
1407 | case NL80211_CHAN_WIDTH_160: | |
1408 | width = 160; | |
1409 | break; | |
1410 | default: | |
1411 | width = 20; | |
1412 | break; | |
1413 | } | |
1414 | ||
1415 | cf1 = chandef->center_freq1; | |
1416 | ||
1417 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1418 | ||
1419 | if (cf2) | |
1420 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1421 | channels_max - n_chan, cf2, | |
1422 | width); | |
1423 | ||
1424 | return n_chan; | |
1425 | } | |
1426 | ||
ce9058ae BP |
1427 | /* |
1428 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1429 | */ | |
1430 | ||
af8cdcd8 | 1431 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1432 | { |
1433 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1434 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1435 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1436 | struct ieee80211_channel *chan = NULL; |
46900298 | 1437 | const u8 *bssid = NULL; |
7ca15a0a | 1438 | enum nl80211_bss_scan_width scan_width; |
46900298 JB |
1439 | int active_ibss; |
1440 | ||
8d61ffa5 | 1441 | sdata_assert_lock(sdata); |
7a17a33c | 1442 | |
46900298 | 1443 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1444 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1445 | |
1446 | if (active_ibss) | |
af8cdcd8 | 1447 | return; |
46900298 | 1448 | |
af8cdcd8 JB |
1449 | if (ifibss->fixed_bssid) |
1450 | bssid = ifibss->bssid; | |
1451 | if (ifibss->fixed_channel) | |
3aede78a | 1452 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1453 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1454 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1455 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1456 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1457 | IEEE80211_BSS_TYPE_IBSS, |
1458 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1459 | |
1460 | if (cbss) { | |
1461 | struct ieee80211_bss *bss; | |
46900298 | 1462 | |
0c1ad2ca | 1463 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1464 | ibss_dbg(sdata, |
1465 | "sta_find_ibss: selected %pM current %pM\n", | |
1466 | cbss->bssid, ifibss->bssid); | |
1467 | sdata_info(sdata, | |
1468 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1469 | cbss->bssid); | |
46900298 | 1470 | |
af8cdcd8 | 1471 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1472 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1473 | return; |
d419b9f0 | 1474 | } |
46900298 | 1475 | |
d8eb741e AQ |
1476 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1477 | * directly and do not waste time scanning | |
1478 | */ | |
1479 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1480 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1481 | bssid); | |
1482 | ieee80211_sta_create_ibss(sdata); | |
1483 | return; | |
1484 | } | |
1485 | ||
1486 | ||
bdcbd8e0 | 1487 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1488 | |
1489 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1490 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1491 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1492 | struct ieee80211_channel *channels[8]; |
1493 | unsigned int num; | |
1494 | ||
bdcbd8e0 | 1495 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1496 | |
7ca15a0a | 1497 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
d321cd01 SS |
1498 | |
1499 | if (ifibss->fixed_channel) { | |
1500 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, | |
1501 | &ifibss->chandef, | |
1502 | channels, | |
1503 | ARRAY_SIZE(channels)); | |
1504 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1505 | ifibss->ssid_len, channels, | |
1506 | num, scan_width); | |
1507 | } else { | |
1508 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1509 | ifibss->ssid_len, NULL, | |
1510 | 0, scan_width); | |
1511 | } | |
ce9058ae | 1512 | } else { |
46900298 JB |
1513 | int interval = IEEE80211_SCAN_INTERVAL; |
1514 | ||
1515 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1516 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1517 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1518 | |
af8cdcd8 JB |
1519 | mod_timer(&ifibss->timer, |
1520 | round_jiffies(jiffies + interval)); | |
46900298 | 1521 | } |
46900298 JB |
1522 | } |
1523 | ||
1524 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1525 | struct sk_buff *req) |
46900298 | 1526 | { |
c269a203 | 1527 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1528 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1529 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1530 | int tx_last_beacon, len = req->len; |
46900298 | 1531 | struct sk_buff *skb; |
c3ffeab4 | 1532 | struct beacon_data *presp; |
46900298 JB |
1533 | u8 *pos, *end; |
1534 | ||
8d61ffa5 | 1535 | sdata_assert_lock(sdata); |
7a17a33c | 1536 | |
6858ad75 | 1537 | presp = sdata_dereference(ifibss->presp, sdata); |
40b275b6 | 1538 | |
46900298 | 1539 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1540 | len < 24 + 2 || !presp) |
46900298 JB |
1541 | return; |
1542 | ||
24487981 | 1543 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1544 | |
c6e57b38 EG |
1545 | ibss_dbg(sdata, "RX ProbeReq SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
1546 | ibss_dbg(sdata, "\tBSSID=%pM (tx_last_beacon=%d)\n", | |
1547 | mgmt->bssid, tx_last_beacon); | |
46900298 | 1548 | |
1ed76487 | 1549 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1550 | return; |
1551 | ||
b203ca39 | 1552 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1553 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1554 | return; |
1555 | ||
1556 | end = ((u8 *) mgmt) + len; | |
1557 | pos = mgmt->u.probe_req.variable; | |
1558 | if (pos[0] != WLAN_EID_SSID || | |
1559 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1560 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1561 | mgmt->sa); | |
46900298 JB |
1562 | return; |
1563 | } | |
1564 | if (pos[1] != 0 && | |
1565 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1566 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1567 | /* Ignore ProbeReq for foreign SSID */ |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1572 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1573 | if (!skb) |
1574 | return; | |
1575 | ||
c3ffeab4 | 1576 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 1577 | skb_put_data(skb, presp->head, presp->head_len); |
c3ffeab4 JB |
1578 | |
1579 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1580 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1581 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1582 | |
1583 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1584 | if (pos[1] == 0) | |
1585 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1586 | ||
62ae67be | 1587 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1588 | } |
1589 | ||
d45c4172 EG |
1590 | static |
1591 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1592 | struct ieee80211_mgmt *mgmt, size_t len, | |
1593 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1594 | { |
1595 | size_t baselen; | |
5d24828d | 1596 | struct ieee802_11_elems *elems; |
46900298 | 1597 | |
d45c4172 EG |
1598 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1599 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1600 | ||
1601 | /* | |
1602 | * either beacon or probe_resp but the variable field is at the | |
1603 | * same offset | |
1604 | */ | |
46900298 JB |
1605 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1606 | if (baselen > len) | |
1607 | return; | |
1608 | ||
5d24828d | 1609 | elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, |
38c6aa29 | 1610 | len - baselen, false, NULL); |
46900298 | 1611 | |
5d24828d JB |
1612 | if (elems) { |
1613 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, elems); | |
1614 | kfree(elems); | |
1615 | } | |
46900298 JB |
1616 | } |
1617 | ||
1fa57d01 JB |
1618 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1619 | struct sk_buff *skb) | |
46900298 JB |
1620 | { |
1621 | struct ieee80211_rx_status *rx_status; | |
1622 | struct ieee80211_mgmt *mgmt; | |
1623 | u16 fc; | |
5d24828d | 1624 | struct ieee802_11_elems *elems; |
cd7760e6 | 1625 | int ies_len; |
46900298 | 1626 | |
f1d58c25 | 1627 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1628 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1629 | fc = le16_to_cpu(mgmt->frame_control); | |
1630 | ||
8d61ffa5 | 1631 | sdata_lock(sdata); |
7a17a33c | 1632 | |
c926d006 TH |
1633 | if (!sdata->u.ibss.ssid_len) |
1634 | goto mgmt_out; /* not ready to merge yet */ | |
1635 | ||
46900298 JB |
1636 | switch (fc & IEEE80211_FCTL_STYPE) { |
1637 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1638 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1639 | break; |
1640 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1641 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1642 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1643 | rx_status); | |
46900298 JB |
1644 | break; |
1645 | case IEEE80211_STYPE_AUTH: | |
1646 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1647 | break; | |
2cc59e78 AQ |
1648 | case IEEE80211_STYPE_DEAUTH: |
1649 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1650 | break; | |
cd7760e6 SW |
1651 | case IEEE80211_STYPE_ACTION: |
1652 | switch (mgmt->u.action.category) { | |
1653 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1654 | ies_len = skb->len - | |
1655 | offsetof(struct ieee80211_mgmt, | |
1656 | u.action.u.chan_switch.variable); | |
1657 | ||
1658 | if (ies_len < 0) | |
1659 | break; | |
1660 | ||
5d24828d | 1661 | elems = ieee802_11_parse_elems( |
cd7760e6 | 1662 | mgmt->u.action.u.chan_switch.variable, |
38c6aa29 | 1663 | ies_len, true, NULL); |
cd7760e6 | 1664 | |
8223ac19 JB |
1665 | if (elems && !elems->parse_error) |
1666 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, | |
1667 | skb->len, | |
1668 | rx_status, | |
1669 | elems); | |
5d24828d | 1670 | kfree(elems); |
cd7760e6 SW |
1671 | break; |
1672 | } | |
46900298 | 1673 | } |
7a17a33c | 1674 | |
c926d006 | 1675 | mgmt_out: |
8d61ffa5 | 1676 | sdata_unlock(sdata); |
46900298 JB |
1677 | } |
1678 | ||
1fa57d01 | 1679 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1680 | { |
1fa57d01 | 1681 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1682 | struct sta_info *sta; |
46900298 | 1683 | |
8d61ffa5 | 1684 | sdata_lock(sdata); |
7a17a33c JB |
1685 | |
1686 | /* | |
1687 | * Work could be scheduled after scan or similar | |
1688 | * when we aren't even joined (or trying) with a | |
1689 | * network. | |
1690 | */ | |
1691 | if (!ifibss->ssid_len) | |
1692 | goto out; | |
46900298 | 1693 | |
8bf11d8d JB |
1694 | spin_lock_bh(&ifibss->incomplete_lock); |
1695 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1696 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1697 | struct sta_info, list); | |
1698 | list_del(&sta->list); | |
1699 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1700 | ||
52874a5e | 1701 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1702 | rcu_read_unlock(); |
1703 | spin_lock_bh(&ifibss->incomplete_lock); | |
1704 | } | |
1705 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1706 | ||
46900298 JB |
1707 | switch (ifibss->state) { |
1708 | case IEEE80211_IBSS_MLME_SEARCH: | |
1709 | ieee80211_sta_find_ibss(sdata); | |
1710 | break; | |
1711 | case IEEE80211_IBSS_MLME_JOINED: | |
1712 | ieee80211_sta_merge_ibss(sdata); | |
1713 | break; | |
1714 | default: | |
1715 | WARN_ON(1); | |
1716 | break; | |
1717 | } | |
46900298 | 1718 | |
7a17a33c | 1719 | out: |
8d61ffa5 | 1720 | sdata_unlock(sdata); |
3a4d4aa2 JB |
1721 | } |
1722 | ||
34f11cd3 | 1723 | static void ieee80211_ibss_timer(struct timer_list *t) |
46900298 JB |
1724 | { |
1725 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 1726 | from_timer(sdata, t, u.ibss.timer); |
5bb644a0 | 1727 | |
16114496 | 1728 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
5bb644a0 | 1729 | } |
5bb644a0 | 1730 | |
46900298 JB |
1731 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1732 | { | |
1733 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1734 | ||
34f11cd3 | 1735 | timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0); |
8bf11d8d JB |
1736 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1737 | spin_lock_init(&ifibss->incomplete_lock); | |
87351d09 JB |
1738 | wiphy_work_init(&ifibss->csa_connection_drop_work, |
1739 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1740 | } |
1741 | ||
1742 | /* scan finished notification */ | |
1743 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1744 | { | |
af8cdcd8 | 1745 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1746 | |
29b4a4f7 JB |
1747 | mutex_lock(&local->iflist_mtx); |
1748 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 1749 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1750 | continue; |
af8cdcd8 JB |
1751 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1752 | continue; | |
1753 | sdata->u.ibss.last_scan_completed = jiffies; | |
46900298 | 1754 | } |
29b4a4f7 | 1755 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
1756 | } |
1757 | ||
af8cdcd8 JB |
1758 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1759 | struct cfg80211_ibss_params *params) | |
1760 | { | |
15ddba5f | 1761 | u64 changed = 0; |
2103dec1 SW |
1762 | u32 rate_flags; |
1763 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1764 | enum ieee80211_chanctx_mode chanmode; |
1765 | struct ieee80211_local *local = sdata->local; | |
1766 | int radar_detect_width = 0; | |
2103dec1 | 1767 | int i; |
71965c1d LC |
1768 | int ret; |
1769 | ||
b6011960 TP |
1770 | if (params->chandef.chan->freq_offset) { |
1771 | /* this may work, but is untested */ | |
1772 | return -EOPNOTSUPP; | |
1773 | } | |
1774 | ||
71965c1d LC |
1775 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, |
1776 | ¶ms->chandef, | |
1777 | sdata->wdev.iftype); | |
1778 | if (ret < 0) | |
1779 | return ret; | |
1780 | ||
1781 | if (ret > 0) { | |
1782 | if (!params->userspace_handles_dfs) | |
1783 | return -EINVAL; | |
1784 | radar_detect_width = BIT(params->chandef.width); | |
1785 | } | |
1786 | ||
1787 | chanmode = (params->channel_fixed && !ret) ? | |
1788 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1789 | ||
1790 | mutex_lock(&local->chanctx_mtx); | |
1791 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, | |
1792 | radar_detect_width); | |
1793 | mutex_unlock(&local->chanctx_mtx); | |
1794 | if (ret < 0) | |
1795 | return ret; | |
af8cdcd8 | 1796 | |
af8cdcd8 JB |
1797 | if (params->bssid) { |
1798 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1799 | sdata->u.ibss.fixed_bssid = true; | |
1800 | } else | |
1801 | sdata->u.ibss.fixed_bssid = false; | |
1802 | ||
fffd0934 | 1803 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1804 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1805 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1806 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1807 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1808 | |
1809 | /* fix basic_rates if channel does not support these rates */ | |
1810 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1811 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1812 | for (i = 0; i < sband->n_bitrates; i++) { |
1813 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1814 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1815 | } | |
dd5b4cc7 FF |
1816 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1817 | sizeof(params->mcast_rate)); | |
fffd0934 | 1818 | |
57c4d7b4 JB |
1819 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1820 | ||
3aede78a | 1821 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1822 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1823 | ||
1824 | if (params->ie) { | |
1825 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1826 | GFP_KERNEL); | |
1827 | if (sdata->u.ibss.ie) | |
1828 | sdata->u.ibss.ie_len = params->ie_len; | |
1829 | } | |
1830 | ||
af8cdcd8 JB |
1831 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1832 | sdata->u.ibss.ibss_join_req = jiffies; | |
1833 | ||
badecb00 | 1834 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1835 | sdata->u.ibss.ssid_len = params->ssid_len; |
1836 | ||
822854b0 SW |
1837 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1838 | sizeof(sdata->u.ibss.ht_capa)); | |
1839 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1840 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1841 | ||
ff3cc5f4 SW |
1842 | /* |
1843 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1844 | * reserved, but an HT STA shall protect HT transmissions as though | |
1845 | * the HT Protection field were set to non-HT mixed mode. | |
1846 | * | |
1847 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1848 | * also reserved, but an HT STA shall operate as though this field | |
1849 | * were set to 1. | |
1850 | */ | |
1851 | ||
1852 | sdata->vif.bss_conf.ht_operation_mode |= | |
1853 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1854 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1855 | ||
dcbe73ca | 1856 | changed |= BSS_CHANGED_HT | BSS_CHANGED_MCAST_RATE; |
d8675a63 | 1857 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); |
ff3cc5f4 | 1858 | |
bfd8403a JB |
1859 | sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; |
1860 | sdata->deflink.needed_rx_chains = local->rx_chains; | |
018f6fbf | 1861 | sdata->control_port_over_nl80211 = params->control_port_over_nl80211; |
04ecd257 | 1862 | |
16114496 | 1863 | wiphy_work_queue(local->hw.wiphy, &sdata->work); |
af8cdcd8 JB |
1864 | |
1865 | return 0; | |
1866 | } | |
1867 | ||
1868 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1869 | { | |
5ea096c0 | 1870 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1871 | |
871a4180 | 1872 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1873 | ifibss->ssid_len = 0; |
c84a67a2 | 1874 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1875 | |
1876 | /* remove beacon */ | |
1877 | kfree(sdata->u.ibss.ie); | |
3bd801b1 MT |
1878 | sdata->u.ibss.ie = NULL; |
1879 | sdata->u.ibss.ie_len = 0; | |
822854b0 SW |
1880 | |
1881 | /* on the next join, re-program HT parameters */ | |
1882 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1883 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1884 | ||
af8cdcd8 | 1885 | synchronize_rcu(); |
af8cdcd8 | 1886 | |
35f20c14 | 1887 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1888 | |
bc05d19f | 1889 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1890 | |
af8cdcd8 JB |
1891 | return 0; |
1892 | } |