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; | |
24487981 | 54 | |
46900298 | 55 | /* Build IBSS probe response */ |
c3ffeab4 JB |
56 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
57 | 12 /* struct ieee80211_mgmt.u.beacon */ + | |
58 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + | |
59 | 2 + 8 /* max Supported Rates */ + | |
60 | 3 /* max DS params */ + | |
61 | 4 /* IBSS params */ + | |
cd7760e6 | 62 | 5 /* Channel Switch Announcement */ + |
c3ffeab4 JB |
63 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
64 | 2 + sizeof(struct ieee80211_ht_cap) + | |
65 | 2 + sizeof(struct ieee80211_ht_operation) + | |
f1f3e9e2 JB |
66 | 2 + sizeof(struct ieee80211_vht_cap) + |
67 | 2 + sizeof(struct ieee80211_vht_operation) + | |
c3ffeab4 JB |
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); | |
d51b70ff SW |
94 | rates_n = 0; |
95 | if (have_higher_than_11mbit) | |
96 | *have_higher_than_11mbit = false; | |
97 | ||
2103dec1 SW |
98 | for (i = 0; i < sband->n_bitrates; i++) { |
99 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
100 | continue; | |
d51b70ff SW |
101 | if (sband->bitrates[i].bitrate > 110 && |
102 | have_higher_than_11mbit) | |
103 | *have_higher_than_11mbit = true; | |
2103dec1 SW |
104 | |
105 | rates |= BIT(i); | |
106 | rates_n++; | |
107 | } | |
108 | ||
46900298 | 109 | *pos++ = WLAN_EID_SUPP_RATES; |
2103dec1 SW |
110 | *pos++ = min_t(int, 8, rates_n); |
111 | for (ri = 0; ri < sband->n_bitrates; ri++) { | |
2400dfe2 | 112 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, 5); |
c3ffeab4 | 113 | u8 basic = 0; |
2103dec1 SW |
114 | if (!(rates & BIT(ri))) |
115 | continue; | |
116 | ||
117 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 118 | basic = 0x80; |
2103dec1 | 119 | *pos++ = basic | (u8) rate; |
93c75786 SW |
120 | if (++rates_added == 8) { |
121 | ri++; /* continue at next rate for EXT_SUPP_RATES */ | |
2103dec1 | 122 | break; |
93c75786 | 123 | } |
c3ffeab4 | 124 | } |
46900298 | 125 | |
57fbcce3 | 126 | if (sband->band == NL80211_BAND_2GHZ) { |
46900298 JB |
127 | *pos++ = WLAN_EID_DS_PARAMS; |
128 | *pos++ = 1; | |
d51b70ff SW |
129 | *pos++ = ieee80211_frequency_to_channel( |
130 | chandef->chan->center_freq); | |
46900298 JB |
131 | } |
132 | ||
46900298 JB |
133 | *pos++ = WLAN_EID_IBSS_PARAMS; |
134 | *pos++ = 2; | |
135 | /* FIX: set ATIM window based on scan results */ | |
136 | *pos++ = 0; | |
137 | *pos++ = 0; | |
138 | ||
cd7760e6 SW |
139 | if (csa_settings) { |
140 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
141 | *pos++ = 3; | |
142 | *pos++ = csa_settings->block_tx ? 1 : 0; | |
143 | *pos++ = ieee80211_frequency_to_channel( | |
144 | csa_settings->chandef.chan->center_freq); | |
8552a434 | 145 | presp->cntdwn_counter_offsets[0] = (pos - presp->head); |
cd7760e6 | 146 | *pos++ = csa_settings->count; |
8552a434 | 147 | presp->cntdwn_current_counter = csa_settings->count; |
cd7760e6 SW |
148 | } |
149 | ||
2103dec1 SW |
150 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
151 | if (rates_n > 8) { | |
46900298 | 152 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
2103dec1 SW |
153 | *pos++ = rates_n - 8; |
154 | for (; ri < sband->n_bitrates; ri++) { | |
2400dfe2 | 155 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, 5); |
c3ffeab4 | 156 | u8 basic = 0; |
2103dec1 SW |
157 | if (!(rates & BIT(ri))) |
158 | continue; | |
159 | ||
160 | if (basic_rates & BIT(ri)) | |
c3ffeab4 | 161 | basic = 0x80; |
2103dec1 | 162 | *pos++ = basic | (u8) rate; |
c3ffeab4 | 163 | } |
46900298 JB |
164 | } |
165 | ||
c3ffeab4 JB |
166 | if (ifibss->ie_len) { |
167 | memcpy(pos, ifibss->ie, ifibss->ie_len); | |
168 | pos += ifibss->ie_len; | |
169 | } | |
af8cdcd8 | 170 | |
13c40c54 | 171 | /* add HT capability and information IEs */ |
d51b70ff SW |
172 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
173 | chandef->width != NL80211_CHAN_WIDTH_5 && | |
174 | chandef->width != NL80211_CHAN_WIDTH_10 && | |
683b6d3b | 175 | sband->ht_cap.ht_supported) { |
822854b0 SW |
176 | struct ieee80211_sta_ht_cap ht_cap; |
177 | ||
178 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
179 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
180 | ||
181 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
0d894ec5 AN |
182 | /* |
183 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection | |
184 | * field and RIFS Mode are reserved in IBSS mode, therefore | |
185 | * keep them at 0 | |
186 | */ | |
074d46d1 | 187 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
57f255f5 | 188 | chandef, 0, false); |
abcff6ef JD |
189 | |
190 | /* add VHT capability and information IEs */ | |
191 | if (chandef->width != NL80211_CHAN_WIDTH_20 && | |
192 | chandef->width != NL80211_CHAN_WIDTH_40 && | |
193 | sband->vht_cap.vht_supported) { | |
194 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, | |
195 | sband->vht_cap.cap); | |
196 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, | |
197 | chandef); | |
198 | } | |
13c40c54 AS |
199 | } |
200 | ||
40b861a0 AN |
201 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
202 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ | |
9eba6125 | 203 | |
c3ffeab4 JB |
204 | presp->head_len = pos - presp->head; |
205 | if (WARN_ON(presp->head_len > frame_len)) | |
d51b70ff SW |
206 | goto error; |
207 | ||
208 | return presp; | |
209 | error: | |
210 | kfree(presp); | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, | |
215 | const u8 *bssid, const int beacon_int, | |
b35c8097 | 216 | struct cfg80211_chan_def *req_chandef, |
d51b70ff SW |
217 | const u32 basic_rates, |
218 | const u16 capability, u64 tsf, | |
219 | bool creator) | |
220 | { | |
221 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
222 | struct ieee80211_local *local = sdata->local; | |
d51b70ff SW |
223 | struct ieee80211_mgmt *mgmt; |
224 | struct cfg80211_bss *bss; | |
15ddba5f | 225 | u64 bss_change; |
6092077a | 226 | struct ieee80211_chan_req chanreq = {}; |
b35c8097 | 227 | struct ieee80211_channel *chan; |
d51b70ff | 228 | struct beacon_data *presp; |
61f6bba0 | 229 | struct cfg80211_inform_bss bss_meta = {}; |
d51b70ff | 230 | bool have_higher_than_11mbit; |
2beb6dab | 231 | bool radar_required; |
55fff501 | 232 | int err; |
d51b70ff | 233 | |
0cd8080e | 234 | lockdep_assert_wiphy(local->hw.wiphy); |
d51b70ff SW |
235 | |
236 | /* Reset own TSF to allow time synchronization work. */ | |
237 | drv_reset_tsf(local, sdata); | |
238 | ||
239 | if (!ether_addr_equal(ifibss->bssid, bssid)) | |
ec67d6e0 | 240 | sta_info_flush(sdata, -1); |
d51b70ff SW |
241 | |
242 | /* if merging, indicate to driver that we leave the old IBSS */ | |
f276e20b JB |
243 | if (sdata->vif.cfg.ibss_joined) { |
244 | sdata->vif.cfg.ibss_joined = false; | |
245 | sdata->vif.cfg.ibss_creator = false; | |
d51b70ff SW |
246 | sdata->vif.bss_conf.enable_beacon = false; |
247 | netif_carrier_off(sdata->dev); | |
248 | ieee80211_bss_info_change_notify(sdata, | |
249 | BSS_CHANGED_IBSS | | |
250 | BSS_CHANGED_BEACON_ENABLED); | |
55fff501 | 251 | drv_leave_ibss(local, sdata); |
d51b70ff SW |
252 | } |
253 | ||
6858ad75 | 254 | presp = sdata_dereference(ifibss->presp, sdata); |
0c2bef46 | 255 | RCU_INIT_POINTER(ifibss->presp, NULL); |
d51b70ff SW |
256 | if (presp) |
257 | kfree_rcu(presp, rcu_head); | |
258 | ||
b35c8097 | 259 | /* make a copy of the chandef, it could be modified below. */ |
6092077a JB |
260 | chanreq.oper = *req_chandef; |
261 | chan = chanreq.oper.chan; | |
262 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chanreq.oper, | |
174e0cd2 | 263 | NL80211_IFTYPE_ADHOC)) { |
6092077a JB |
264 | if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || |
265 | chanreq.oper.width == NL80211_CHAN_WIDTH_10 || | |
266 | chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || | |
267 | chanreq.oper.width == NL80211_CHAN_WIDTH_20) { | |
d51b70ff SW |
268 | sdata_info(sdata, |
269 | "Failed to join IBSS, beacons forbidden\n"); | |
270 | return; | |
271 | } | |
6092077a JB |
272 | chanreq.oper.width = NL80211_CHAN_WIDTH_20; |
273 | chanreq.oper.center_freq1 = chan->center_freq; | |
8e8d347d | 274 | /* check again for downgraded chandef */ |
6092077a | 275 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chanreq.oper, |
174e0cd2 | 276 | NL80211_IFTYPE_ADHOC)) { |
8e8d347d SW |
277 | sdata_info(sdata, |
278 | "Failed to join IBSS, beacons forbidden\n"); | |
279 | return; | |
280 | } | |
281 | } | |
282 | ||
283 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
6092077a | 284 | &chanreq.oper, NL80211_IFTYPE_ADHOC); |
6658ab80 LC |
285 | if (err < 0) { |
286 | sdata_info(sdata, | |
287 | "Failed to join IBSS, invalid chandef\n"); | |
288 | return; | |
289 | } | |
2beb6dab LC |
290 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
291 | sdata_info(sdata, | |
292 | "Failed to join IBSS, DFS channel without control program\n"); | |
293 | return; | |
d51b70ff SW |
294 | } |
295 | ||
2beb6dab LC |
296 | radar_required = err; |
297 | ||
6092077a | 298 | if (ieee80211_link_use_channel(&sdata->deflink, &chanreq, |
b4f85443 | 299 | ifibss->fixed_channel ? |
d51b70ff SW |
300 | IEEE80211_CHANCTX_SHARED : |
301 | IEEE80211_CHANCTX_EXCLUSIVE)) { | |
302 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); | |
303 | return; | |
304 | } | |
bfd8403a | 305 | sdata->deflink.radar_required = radar_required; |
d51b70ff SW |
306 | |
307 | memcpy(ifibss->bssid, bssid, ETH_ALEN); | |
308 | ||
d51b70ff | 309 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
6092077a | 310 | capability, tsf, &chanreq.oper, |
cd7760e6 | 311 | &have_higher_than_11mbit, NULL); |
d51b70ff | 312 | if (!presp) |
c3ffeab4 JB |
313 | return; |
314 | ||
315 | rcu_assign_pointer(ifibss->presp, presp); | |
d51b70ff | 316 | mgmt = (void *)presp->head; |
46900298 | 317 | |
d6a83228 | 318 | sdata->vif.bss_conf.enable_beacon = true; |
2d0ddec5 | 319 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 320 | sdata->vif.bss_conf.basic_rates = basic_rates; |
f276e20b JB |
321 | sdata->vif.cfg.ssid_len = ifibss->ssid_len; |
322 | memcpy(sdata->vif.cfg.ssid, ifibss->ssid, ifibss->ssid_len); | |
2d0ddec5 JB |
323 | bss_change = BSS_CHANGED_BEACON_INT; |
324 | bss_change |= ieee80211_reset_erp_info(sdata); | |
325 | bss_change |= BSS_CHANGED_BSSID; | |
326 | bss_change |= BSS_CHANGED_BEACON; | |
327 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 328 | bss_change |= BSS_CHANGED_BASIC_RATES; |
13c40c54 | 329 | bss_change |= BSS_CHANGED_HT; |
8fc214ba | 330 | bss_change |= BSS_CHANGED_IBSS; |
0ca54f6c | 331 | bss_change |= BSS_CHANGED_SSID; |
2f91a967 SW |
332 | |
333 | /* | |
334 | * In 5 GHz/802.11a, we can always use short slot time. | |
335 | * (IEEE 802.11-2012 18.3.8.7) | |
336 | * | |
337 | * In 2.4GHz, we must always use long slots in IBSS for compatibility | |
338 | * reasons. | |
339 | * (IEEE 802.11-2012 19.4.5) | |
340 | * | |
341 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) | |
342 | */ | |
57fbcce3 | 343 | sdata->vif.bss_conf.use_short_slot = chan->band == NL80211_BAND_5GHZ; |
2f91a967 SW |
344 | bss_change |= BSS_CHANGED_ERP_SLOT; |
345 | ||
2ec9c1f6 | 346 | /* cf. IEEE 802.11 9.2.12 */ |
39eac2de JB |
347 | sdata->deflink.operating_11g_mode = |
348 | chan->band == NL80211_BAND_2GHZ && have_higher_than_11mbit; | |
2ec9c1f6 | 349 | |
b3e2130b | 350 | ieee80211_set_wmm_default(&sdata->deflink, true, false); |
55fff501 | 351 | |
f276e20b JB |
352 | sdata->vif.cfg.ibss_joined = true; |
353 | sdata->vif.cfg.ibss_creator = creator; | |
46900298 | 354 | |
55fff501 JB |
355 | err = drv_join_ibss(local, sdata); |
356 | if (err) { | |
f276e20b JB |
357 | sdata->vif.cfg.ibss_joined = false; |
358 | sdata->vif.cfg.ibss_creator = false; | |
55fff501 | 359 | sdata->vif.bss_conf.enable_beacon = false; |
f276e20b | 360 | sdata->vif.cfg.ssid_len = 0; |
55fff501 JB |
361 | RCU_INIT_POINTER(ifibss->presp, NULL); |
362 | kfree_rcu(presp, rcu_head); | |
d8675a63 | 363 | ieee80211_link_release_channel(&sdata->deflink); |
55fff501 JB |
364 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
365 | err); | |
366 | return; | |
367 | } | |
368 | ||
369 | ieee80211_bss_info_change_notify(sdata, bss_change); | |
46900298 | 370 | |
46900298 | 371 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
372 | mod_timer(&ifibss->timer, |
373 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 374 | |
61f6bba0 | 375 | bss_meta.chan = chan; |
61f6bba0 JB |
376 | bss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, |
377 | presp->head_len, GFP_KERNEL); | |
378 | ||
5b112d3d | 379 | cfg80211_put_bss(local->hw.wiphy, bss); |
86a2ea41 | 380 | netif_carrier_on(sdata->dev); |
fe94f3a4 | 381 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
46900298 JB |
382 | } |
383 | ||
af8cdcd8 JB |
384 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
385 | struct ieee80211_bss *bss) | |
46900298 | 386 | { |
0c1ad2ca JB |
387 | struct cfg80211_bss *cbss = |
388 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 | 389 | struct ieee80211_supported_band *sband; |
75a423f4 | 390 | struct cfg80211_chan_def chandef; |
b59066a2 JB |
391 | u32 basic_rates; |
392 | int i, j; | |
0c1ad2ca | 393 | u16 beacon_int = cbss->beacon_interval; |
8cef2c9d | 394 | const struct cfg80211_bss_ies *ies; |
75a423f4 | 395 | enum nl80211_channel_type chan_type; |
8cef2c9d | 396 | u64 tsf; |
2103dec1 | 397 | u32 rate_flags; |
57c4d7b4 | 398 | |
076fc877 | 399 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
7a17a33c | 400 | |
57c4d7b4 JB |
401 | if (beacon_int < 10) |
402 | beacon_int = 10; | |
403 | ||
75a423f4 SW |
404 | switch (sdata->u.ibss.chandef.width) { |
405 | case NL80211_CHAN_WIDTH_20_NOHT: | |
406 | case NL80211_CHAN_WIDTH_20: | |
407 | case NL80211_CHAN_WIDTH_40: | |
408 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); | |
409 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); | |
410 | break; | |
411 | case NL80211_CHAN_WIDTH_5: | |
412 | case NL80211_CHAN_WIDTH_10: | |
413 | cfg80211_chandef_create(&chandef, cbss->channel, | |
a4ac6f2e | 414 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
415 | chandef.width = sdata->u.ibss.chandef.width; |
416 | break; | |
abcff6ef | 417 | case NL80211_CHAN_WIDTH_80: |
c39b336d | 418 | case NL80211_CHAN_WIDTH_80P80: |
abcff6ef JD |
419 | case NL80211_CHAN_WIDTH_160: |
420 | chandef = sdata->u.ibss.chandef; | |
421 | chandef.chan = cbss->channel; | |
422 | break; | |
75a423f4 SW |
423 | default: |
424 | /* fall back to 20 MHz for unsupported modes */ | |
425 | cfg80211_chandef_create(&chandef, cbss->channel, | |
a4ac6f2e | 426 | NL80211_CHAN_NO_HT); |
75a423f4 SW |
427 | break; |
428 | } | |
429 | ||
0c1ad2ca | 430 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
2103dec1 | 431 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
b59066a2 JB |
432 | |
433 | basic_rates = 0; | |
434 | ||
435 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2103dec1 | 436 | int rate = bss->supp_rates[i] & 0x7f; |
b59066a2 JB |
437 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
438 | ||
439 | for (j = 0; j < sband->n_bitrates; j++) { | |
2103dec1 SW |
440 | int brate; |
441 | if ((rate_flags & sband->bitrates[j].flags) | |
442 | != rate_flags) | |
443 | continue; | |
444 | ||
2400dfe2 | 445 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 5); |
2103dec1 | 446 | if (brate == rate) { |
b59066a2 JB |
447 | if (is_basic) |
448 | basic_rates |= BIT(j); | |
449 | break; | |
450 | } | |
451 | } | |
452 | } | |
453 | ||
8cef2c9d JB |
454 | rcu_read_lock(); |
455 | ies = rcu_dereference(cbss->ies); | |
456 | tsf = ies->tsf; | |
457 | rcu_read_unlock(); | |
458 | ||
0c1ad2ca | 459 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 460 | beacon_int, |
75a423f4 | 461 | &chandef, |
b59066a2 | 462 | basic_rates, |
0c1ad2ca | 463 | cbss->capability, |
8cef2c9d | 464 | tsf, false); |
46900298 JB |
465 | } |
466 | ||
cd7760e6 | 467 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
15ddba5f A |
468 | struct cfg80211_csa_settings *csa_settings, |
469 | u64 *changed) | |
cd7760e6 SW |
470 | { |
471 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
472 | struct beacon_data *presp, *old_presp; | |
473 | struct cfg80211_bss *cbss; | |
474 | const struct cfg80211_bss_ies *ies; | |
f181d6a3 | 475 | u16 capability = WLAN_CAPABILITY_IBSS; |
cd7760e6 | 476 | u64 tsf; |
cd7760e6 | 477 | |
076fc877 | 478 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
cd7760e6 | 479 | |
cd7760e6 | 480 | if (ifibss->privacy) |
f181d6a3 | 481 | capability |= WLAN_CAPABILITY_PRIVACY; |
cd7760e6 SW |
482 | |
483 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, | |
484 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
485 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
486 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 | 487 | |
68d83f0a | 488 | if (unlikely(!cbss)) |
0323689d | 489 | return -EINVAL; |
cd7760e6 SW |
490 | |
491 | rcu_read_lock(); | |
492 | ies = rcu_dereference(cbss->ies); | |
493 | tsf = ies->tsf; | |
494 | rcu_read_unlock(); | |
495 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
496 | ||
6858ad75 | 497 | old_presp = sdata_dereference(ifibss->presp, sdata); |
cd7760e6 SW |
498 | |
499 | presp = ieee80211_ibss_build_presp(sdata, | |
500 | sdata->vif.bss_conf.beacon_int, | |
501 | sdata->vif.bss_conf.basic_rates, | |
502 | capability, tsf, &ifibss->chandef, | |
503 | NULL, csa_settings); | |
0323689d | 504 | if (!presp) |
505 | return -ENOMEM; | |
cd7760e6 SW |
506 | |
507 | rcu_assign_pointer(ifibss->presp, presp); | |
508 | if (old_presp) | |
509 | kfree_rcu(old_presp, rcu_head); | |
510 | ||
15ddba5f A |
511 | *changed |= BSS_CHANGED_BEACON; |
512 | return 0; | |
cd7760e6 SW |
513 | } |
514 | ||
15ddba5f | 515 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) |
cd7760e6 SW |
516 | { |
517 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
518 | struct cfg80211_bss *cbss; | |
cd7760e6 | 519 | |
076fc877 | 520 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
bafdc614 | 521 | |
15bc8966 SRP |
522 | /* When not connected/joined, sending CSA doesn't make sense. */ |
523 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED) | |
524 | return -ENOLINK; | |
525 | ||
cd7760e6 SW |
526 | /* update cfg80211 bss information with the new channel */ |
527 | if (!is_zero_ether_addr(ifibss->bssid)) { | |
cd7760e6 SW |
528 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
529 | ifibss->chandef.chan, | |
530 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
531 | ifibss->ssid_len, |
532 | IEEE80211_BSS_TYPE_IBSS, | |
533 | IEEE80211_PRIVACY(ifibss->privacy)); | |
cd7760e6 SW |
534 | /* XXX: should not really modify cfg80211 data */ |
535 | if (cbss) { | |
6092077a | 536 | cbss->channel = sdata->deflink.csa_chanreq.oper.chan; |
cd7760e6 SW |
537 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
538 | } | |
539 | } | |
540 | ||
6092077a | 541 | ifibss->chandef = sdata->deflink.csa_chanreq.oper; |
cd7760e6 SW |
542 | |
543 | /* generate the beacon */ | |
15ddba5f | 544 | return ieee80211_ibss_csa_beacon(sdata, NULL, changed); |
cd7760e6 SW |
545 | } |
546 | ||
547 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) | |
548 | { | |
549 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
550 | ||
87351d09 JB |
551 | wiphy_work_cancel(sdata->local->hw.wiphy, |
552 | &ifibss->csa_connection_drop_work); | |
cd7760e6 SW |
553 | } |
554 | ||
52874a5e | 555 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
8bf11d8d JB |
556 | __acquires(RCU) |
557 | { | |
558 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
559 | u8 addr[ETH_ALEN]; | |
560 | ||
561 | memcpy(addr, sta->sta.addr, ETH_ALEN); | |
562 | ||
bdcbd8e0 | 563 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
8bf11d8d | 564 | |
83d5cc01 JB |
565 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
566 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
267335d6 AQ |
567 | /* authorize the station only if the network is not RSN protected. If |
568 | * not wait for the userspace to authorize it */ | |
569 | if (!sta->sdata->u.ibss.control_port) | |
570 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
8bf11d8d JB |
571 | |
572 | rate_control_rate_init(sta); | |
573 | ||
574 | /* If it fails, maybe we raced another insertion? */ | |
575 | if (sta_info_insert_rcu(sta)) | |
576 | return sta_info_get(sdata, addr); | |
577 | return sta; | |
578 | } | |
579 | ||
580 | static struct sta_info * | |
52874a5e AQ |
581 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
582 | const u8 *addr, u32 supp_rates) | |
8bf11d8d JB |
583 | __acquires(RCU) |
584 | { | |
585 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
586 | struct ieee80211_local *local = sdata->local; | |
587 | struct sta_info *sta; | |
55de908a | 588 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 589 | struct ieee80211_supported_band *sband; |
55de908a | 590 | int band; |
8bf11d8d JB |
591 | |
592 | /* | |
593 | * XXX: Consider removing the least recently used entry and | |
594 | * allow new one to be added. | |
595 | */ | |
596 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
bdcbd8e0 | 597 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 598 | sdata->name, addr); |
8bf11d8d JB |
599 | rcu_read_lock(); |
600 | return NULL; | |
601 | } | |
602 | ||
603 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { | |
604 | rcu_read_lock(); | |
605 | return NULL; | |
606 | } | |
607 | ||
b203ca39 | 608 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
8bf11d8d JB |
609 | rcu_read_lock(); |
610 | return NULL; | |
611 | } | |
612 | ||
55de908a | 613 | rcu_read_lock(); |
d0a9123e | 614 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
615 | if (WARN_ON_ONCE(!chanctx_conf)) |
616 | return NULL; | |
4bf88530 | 617 | band = chanctx_conf->def.chan->band; |
55de908a JB |
618 | rcu_read_unlock(); |
619 | ||
f36fe0a2 | 620 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
8bf11d8d JB |
621 | if (!sta) { |
622 | rcu_read_lock(); | |
623 | return NULL; | |
624 | } | |
625 | ||
8bf11d8d | 626 | /* make sure mandatory rates are always added */ |
b422c6cd | 627 | sband = local->hw.wiphy->bands[band]; |
046d2e7c | 628 | sta->sta.deflink.supp_rates[band] = supp_rates | |
5add321c | 629 | ieee80211_mandatory_rates(sband); |
8bf11d8d | 630 | |
52874a5e | 631 | return ieee80211_ibss_finish_sta(sta); |
6d810f10 AQ |
632 | } |
633 | ||
871a4180 SW |
634 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
635 | { | |
636 | struct ieee80211_local *local = sdata->local; | |
637 | int active = 0; | |
638 | struct sta_info *sta; | |
639 | ||
076fc877 | 640 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
871a4180 SW |
641 | |
642 | rcu_read_lock(); | |
643 | ||
644 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
b8da6b6a JB |
645 | unsigned long last_active = ieee80211_sta_last_active(sta); |
646 | ||
871a4180 | 647 | if (sta->sdata == sdata && |
b8da6b6a JB |
648 | time_is_after_jiffies(last_active + |
649 | IEEE80211_IBSS_MERGE_INTERVAL)) { | |
871a4180 SW |
650 | active++; |
651 | break; | |
652 | } | |
653 | } | |
654 | ||
655 | rcu_read_unlock(); | |
656 | ||
657 | return active; | |
658 | } | |
659 | ||
660 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) | |
661 | { | |
662 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
663 | struct ieee80211_local *local = sdata->local; | |
664 | struct cfg80211_bss *cbss; | |
665 | struct beacon_data *presp; | |
666 | struct sta_info *sta; | |
871a4180 | 667 | |
0cd8080e JB |
668 | lockdep_assert_wiphy(local->hw.wiphy); |
669 | ||
d4c80d9d | 670 | if (!is_zero_ether_addr(ifibss->bssid)) { |
871a4180 SW |
671 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
672 | ifibss->bssid, ifibss->ssid, | |
6eb18137 DL |
673 | ifibss->ssid_len, |
674 | IEEE80211_BSS_TYPE_IBSS, | |
675 | IEEE80211_PRIVACY(ifibss->privacy)); | |
871a4180 SW |
676 | |
677 | if (cbss) { | |
678 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
679 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); | |
680 | } | |
681 | } | |
682 | ||
683 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; | |
684 | ||
ec67d6e0 | 685 | sta_info_flush(sdata, -1); |
871a4180 SW |
686 | |
687 | spin_lock_bh(&ifibss->incomplete_lock); | |
688 | while (!list_empty(&ifibss->incomplete_stations)) { | |
689 | sta = list_first_entry(&ifibss->incomplete_stations, | |
690 | struct sta_info, list); | |
691 | list_del(&sta->list); | |
692 | spin_unlock_bh(&ifibss->incomplete_lock); | |
693 | ||
694 | sta_info_free(local, sta); | |
695 | spin_lock_bh(&ifibss->incomplete_lock); | |
696 | } | |
697 | spin_unlock_bh(&ifibss->incomplete_lock); | |
698 | ||
699 | netif_carrier_off(sdata->dev); | |
700 | ||
f276e20b JB |
701 | sdata->vif.cfg.ibss_joined = false; |
702 | sdata->vif.cfg.ibss_creator = false; | |
871a4180 | 703 | sdata->vif.bss_conf.enable_beacon = false; |
f276e20b | 704 | sdata->vif.cfg.ssid_len = 0; |
871a4180 SW |
705 | |
706 | /* remove beacon */ | |
6858ad75 | 707 | presp = sdata_dereference(ifibss->presp, sdata); |
871a4180 SW |
708 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
709 | if (presp) | |
710 | kfree_rcu(presp, rcu_head); | |
711 | ||
712 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
713 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
714 | BSS_CHANGED_IBSS); | |
55fff501 | 715 | drv_leave_ibss(local, sdata); |
d8675a63 | 716 | ieee80211_link_release_channel(&sdata->deflink); |
871a4180 SW |
717 | } |
718 | ||
87351d09 JB |
719 | static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, |
720 | struct wiphy_work *work) | |
cd7760e6 SW |
721 | { |
722 | struct ieee80211_sub_if_data *sdata = | |
723 | container_of(work, struct ieee80211_sub_if_data, | |
724 | u.ibss.csa_connection_drop_work); | |
725 | ||
726 | ieee80211_ibss_disconnect(sdata); | |
727 | synchronize_rcu(); | |
728 | skb_queue_purge(&sdata->skb_queue); | |
729 | ||
730 | /* trigger a scan to find another IBSS network to join */ | |
16114496 | 731 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
cd7760e6 SW |
732 | } |
733 | ||
8e8d347d SW |
734 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
735 | { | |
736 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
737 | int err; | |
738 | ||
739 | /* if the current channel is a DFS channel, mark the channel as | |
740 | * unavailable. | |
741 | */ | |
742 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
743 | &ifibss->chandef, |
744 | NL80211_IFTYPE_ADHOC); | |
8e8d347d SW |
745 | if (err > 0) |
746 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, | |
747 | GFP_ATOMIC); | |
748 | } | |
749 | ||
cd7760e6 SW |
750 | static bool |
751 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
752 | struct ieee802_11_elems *elems, | |
753 | bool beacon) | |
754 | { | |
755 | struct cfg80211_csa_settings params; | |
c0f17eb9 | 756 | struct ieee80211_csa_ie csa_ie; |
cd7760e6 | 757 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
cd7760e6 | 758 | enum nl80211_channel_type ch_type; |
82a8e17d | 759 | int err; |
310c8387 JB |
760 | struct ieee80211_conn_settings conn = { |
761 | .mode = IEEE80211_CONN_MODE_HT, | |
762 | .bw_limit = IEEE80211_CONN_BW_LIMIT_40, | |
763 | }; | |
2a333a0d | 764 | u32 vht_cap_info = 0; |
cd7760e6 | 765 | |
076fc877 | 766 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
dbd72850 | 767 | |
cd7760e6 SW |
768 | switch (ifibss->chandef.width) { |
769 | case NL80211_CHAN_WIDTH_5: | |
770 | case NL80211_CHAN_WIDTH_10: | |
771 | case NL80211_CHAN_WIDTH_20_NOHT: | |
310c8387 | 772 | conn.mode = IEEE80211_CONN_MODE_LEGACY; |
fc0561dc | 773 | fallthrough; |
cd7760e6 | 774 | case NL80211_CHAN_WIDTH_20: |
310c8387 | 775 | conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; |
cd7760e6 SW |
776 | break; |
777 | default: | |
778 | break; | |
779 | } | |
780 | ||
2a333a0d JB |
781 | if (elems->vht_cap_elem) |
782 | vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); | |
783 | ||
cd7760e6 | 784 | memset(¶ms, 0, sizeof(params)); |
84469a45 | 785 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
cd7760e6 | 786 | ifibss->chandef.chan->band, |
310c8387 JB |
787 | vht_cap_info, &conn, |
788 | ifibss->bssid, &csa_ie); | |
cd7760e6 SW |
789 | /* can't switch to destination channel, fail */ |
790 | if (err < 0) | |
791 | goto disconnect; | |
792 | ||
793 | /* did not contain a CSA */ | |
794 | if (err) | |
795 | return false; | |
796 | ||
0834ae3c SW |
797 | /* channel switch is not supported, disconnect */ |
798 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) | |
799 | goto disconnect; | |
800 | ||
c0f17eb9 | 801 | params.count = csa_ie.count; |
6092077a | 802 | params.chandef = csa_ie.chanreq.oper; |
c0f17eb9 | 803 | |
cd7760e6 SW |
804 | switch (ifibss->chandef.width) { |
805 | case NL80211_CHAN_WIDTH_20_NOHT: | |
806 | case NL80211_CHAN_WIDTH_20: | |
807 | case NL80211_CHAN_WIDTH_40: | |
808 | /* keep our current HT mode (HT20/HT40+/HT40-), even if | |
809 | * another mode has been announced. The mode is not adopted | |
810 | * within the beacon while doing CSA and we should therefore | |
811 | * keep the mode which we announce. | |
812 | */ | |
813 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); | |
814 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, | |
815 | ch_type); | |
816 | break; | |
817 | case NL80211_CHAN_WIDTH_5: | |
818 | case NL80211_CHAN_WIDTH_10: | |
819 | if (params.chandef.width != ifibss->chandef.width) { | |
820 | sdata_info(sdata, | |
821 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", | |
822 | ifibss->bssid, | |
823 | params.chandef.chan->center_freq, | |
824 | params.chandef.width, | |
825 | params.chandef.center_freq1, | |
826 | params.chandef.center_freq2); | |
827 | goto disconnect; | |
828 | } | |
829 | break; | |
830 | default: | |
ba323e29 | 831 | /* should not happen, conn_flags should prevent VHT modes. */ |
cd7760e6 SW |
832 | WARN_ON(1); |
833 | goto disconnect; | |
834 | } | |
835 | ||
174e0cd2 IP |
836 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
837 | NL80211_IFTYPE_ADHOC)) { | |
cd7760e6 SW |
838 | sdata_info(sdata, |
839 | "IBSS %pM switches to unsupported channel (%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 | ||
848 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
849 | ¶ms.chandef, |
850 | NL80211_IFTYPE_ADHOC); | |
cd7760e6 SW |
851 | if (err < 0) |
852 | goto disconnect; | |
2beb6dab | 853 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
8e8d347d | 854 | /* IBSS-DFS only allowed with a control program */ |
2beb6dab | 855 | goto disconnect; |
cd7760e6 SW |
856 | } |
857 | ||
2beb6dab LC |
858 | params.radar_required = err; |
859 | ||
82a8e17d | 860 | if (cfg80211_chandef_identical(¶ms.chandef, |
6092077a | 861 | &sdata->vif.bss_conf.chanreq.oper)) { |
82a8e17d LC |
862 | ibss_dbg(sdata, |
863 | "received csa with an identical chandef, ignoring\n"); | |
864 | return true; | |
cd7760e6 | 865 | } |
cd7760e6 SW |
866 | |
867 | /* all checks done, now perform the channel switch. */ | |
868 | ibss_dbg(sdata, | |
869 | "received channel switch announcement to go to channel %d MHz\n", | |
870 | params.chandef.chan->center_freq); | |
871 | ||
c0f17eb9 | 872 | params.block_tx = !!csa_ie.mode; |
cd7760e6 | 873 | |
82a8e17d LC |
874 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
875 | ¶ms)) | |
876 | goto disconnect; | |
cd7760e6 | 877 | |
8e8d347d SW |
878 | ieee80211_ibss_csa_mark_radar(sdata); |
879 | ||
cd7760e6 SW |
880 | return true; |
881 | disconnect: | |
882 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); | |
87351d09 JB |
883 | wiphy_work_queue(sdata->local->hw.wiphy, |
884 | &ifibss->csa_connection_drop_work); | |
cd7760e6 | 885 | |
8e8d347d SW |
886 | ieee80211_ibss_csa_mark_radar(sdata); |
887 | ||
cd7760e6 SW |
888 | return true; |
889 | } | |
890 | ||
891 | static void | |
892 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, | |
893 | struct ieee80211_mgmt *mgmt, size_t len, | |
894 | struct ieee80211_rx_status *rx_status, | |
895 | struct ieee802_11_elems *elems) | |
896 | { | |
897 | int required_len; | |
898 | ||
899 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
900 | return; | |
901 | ||
902 | /* CSA is the only action we handle for now */ | |
903 | if (mgmt->u.action.u.measurement.action_code != | |
904 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
905 | return; | |
906 | ||
907 | required_len = IEEE80211_MIN_ACTION_SIZE + | |
908 | sizeof(mgmt->u.action.u.chan_switch); | |
909 | if (len < required_len) | |
910 | return; | |
911 | ||
d0a9123e | 912 | if (!sdata->vif.bss_conf.csa_active) |
82a8e17d | 913 | ieee80211_ibss_process_chanswitch(sdata, elems, false); |
cd7760e6 SW |
914 | } |
915 | ||
2cc59e78 AQ |
916 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
917 | struct ieee80211_mgmt *mgmt, | |
918 | size_t len) | |
919 | { | |
920 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); | |
921 | ||
922 | if (len < IEEE80211_DEAUTH_FRAME_LEN) | |
923 | return; | |
924 | ||
c6e57b38 EG |
925 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
926 | ibss_dbg(sdata, "\tBSSID=%pM (reason: %d)\n", mgmt->bssid, reason); | |
2cc59e78 AQ |
927 | sta_info_destroy_addr(sdata, mgmt->sa); |
928 | } | |
929 | ||
6d810f10 AQ |
930 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
931 | struct ieee80211_mgmt *mgmt, | |
932 | size_t len) | |
933 | { | |
934 | u16 auth_alg, auth_transaction; | |
935 | ||
076fc877 | 936 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
6d810f10 AQ |
937 | |
938 | if (len < 24 + 6) | |
939 | return; | |
940 | ||
941 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
942 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
943 | ||
c6e57b38 EG |
944 | ibss_dbg(sdata, "RX Auth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
945 | ibss_dbg(sdata, "\tBSSID=%pM (auth_transaction=%d)\n", | |
946 | mgmt->bssid, auth_transaction); | |
7bed2050 AQ |
947 | |
948 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) | |
949 | return; | |
950 | ||
6d810f10 AQ |
951 | /* |
952 | * IEEE 802.11 standard does not require authentication in IBSS | |
953 | * networks and most implementations do not seem to use it. | |
954 | * However, try to reply to authentication attempts if someone | |
955 | * has actually implemented this. | |
956 | */ | |
700e8ea6 | 957 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
1672c0e3 | 958 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
8bf11d8d JB |
959 | } |
960 | ||
8a4988d1 JD |
961 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
962 | struct ieee80211_mgmt *mgmt, size_t len, | |
963 | struct ieee80211_rx_status *rx_status, | |
964 | struct ieee802_11_elems *elems, | |
965 | struct ieee80211_channel *channel) | |
46900298 | 966 | { |
46900298 | 967 | struct sta_info *sta; |
57fbcce3 | 968 | enum nl80211_band band = rx_status->band; |
8a4988d1 | 969 | struct ieee80211_local *local = sdata->local; |
21a8e9dd | 970 | struct ieee80211_supported_band *sband; |
13c40c54 | 971 | bool rates_updated = false; |
8a4988d1 | 972 | u32 supp_rates = 0; |
46900298 | 973 | |
8a4988d1 | 974 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
46900298 JB |
975 | return; |
976 | ||
8a4988d1 JD |
977 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
978 | return; | |
46900298 | 979 | |
21a8e9dd MSS |
980 | sband = local->hw.wiphy->bands[band]; |
981 | if (WARN_ON(!sband)) | |
982 | return; | |
983 | ||
8a4988d1 JD |
984 | rcu_read_lock(); |
985 | sta = sta_info_get(sdata, mgmt->sa); | |
986 | ||
987 | if (elems->supp_rates) { | |
988 | supp_rates = ieee80211_sta_get_rates(sdata, elems, | |
989 | band, NULL); | |
990 | if (sta) { | |
991 | u32 prev_rates; | |
992 | ||
046d2e7c | 993 | prev_rates = sta->sta.deflink.supp_rates[band]; |
8a4988d1 | 994 | |
046d2e7c | 995 | sta->sta.deflink.supp_rates[band] = supp_rates | |
5add321c | 996 | ieee80211_mandatory_rates(sband); |
046d2e7c | 997 | if (sta->sta.deflink.supp_rates[band] != prev_rates) { |
8a4988d1 JD |
998 | ibss_dbg(sdata, |
999 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", | |
1000 | sta->sta.addr, prev_rates, | |
046d2e7c | 1001 | sta->sta.deflink.supp_rates[band]); |
8a4988d1 | 1002 | rates_updated = true; |
8bf11d8d | 1003 | } |
8a4988d1 JD |
1004 | } else { |
1005 | rcu_read_unlock(); | |
1006 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
1007 | mgmt->sa, supp_rates); | |
34e89507 | 1008 | } |
8a4988d1 | 1009 | } |
9eba6125 | 1010 | |
96a4688e | 1011 | if (sta && !sta->sta.wme && |
1d00ce80 TP |
1012 | (elems->wmm_info || elems->s1g_capab) && |
1013 | local->hw.queues >= IEEE80211_NUM_ACS) { | |
8a4988d1 | 1014 | sta->sta.wme = true; |
96a4688e JB |
1015 | ieee80211_check_fast_xmit(sta); |
1016 | } | |
13c40c54 | 1017 | |
8a4988d1 JD |
1018 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
1019 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && | |
1020 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && | |
1021 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { | |
1022 | /* we both use HT */ | |
1023 | struct ieee80211_ht_cap htcap_ie; | |
1024 | struct cfg80211_chan_def chandef; | |
046d2e7c | 1025 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.deflink.bandwidth; |
d2954457 | 1026 | |
8ac3c704 JB |
1027 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
1028 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); | |
d2954457 | 1029 | |
8a4988d1 | 1030 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
8a4988d1 JD |
1031 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
1032 | &htcap_ie, | |
c71420db | 1033 | &sta->deflink); |
abcff6ef JD |
1034 | |
1035 | if (elems->vht_operation && elems->vht_cap_elem && | |
1036 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && | |
1037 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { | |
1038 | /* we both use VHT */ | |
1039 | struct ieee80211_vht_cap cap_ie; | |
046d2e7c | 1040 | struct ieee80211_sta_vht_cap cap = sta->sta.deflink.vht_cap; |
2a333a0d JB |
1041 | u32 vht_cap_info = |
1042 | le32_to_cpu(elems->vht_cap_elem->vht_cap_info); | |
abcff6ef | 1043 | |
2a333a0d | 1044 | ieee80211_chandef_vht_oper(&local->hw, vht_cap_info, |
7eb26df2 JB |
1045 | elems->vht_operation, |
1046 | elems->ht_operation, | |
8ac3c704 | 1047 | &chandef); |
abcff6ef JD |
1048 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
1049 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, | |
084cf2ae | 1050 | &cap_ie, NULL, |
c71420db | 1051 | &sta->deflink); |
046d2e7c | 1052 | if (memcmp(&cap, &sta->sta.deflink.vht_cap, sizeof(cap))) |
abcff6ef | 1053 | rates_updated |= true; |
13c40c54 AS |
1054 | } |
1055 | ||
046d2e7c | 1056 | if (bw != sta->sta.deflink.bandwidth) |
abcff6ef | 1057 | rates_updated |= true; |
d2954457 | 1058 | |
abcff6ef JD |
1059 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
1060 | &chandef)) | |
1061 | WARN_ON_ONCE(1); | |
8a4988d1 | 1062 | } |
d2954457 | 1063 | |
8a4988d1 JD |
1064 | if (sta && rates_updated) { |
1065 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; | |
046d2e7c | 1066 | u8 rx_nss = sta->sta.deflink.rx_nss; |
13c40c54 | 1067 | |
8a4988d1 | 1068 | /* Force rx_nss recalculation */ |
046d2e7c | 1069 | sta->sta.deflink.rx_nss = 0; |
8a4988d1 | 1070 | rate_control_rate_init(sta); |
046d2e7c | 1071 | if (sta->sta.deflink.rx_nss != rx_nss) |
8a4988d1 | 1072 | changed |= IEEE80211_RC_NSS_CHANGED; |
13c40c54 | 1073 | |
8a4988d1 | 1074 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
46900298 JB |
1075 | } |
1076 | ||
8a4988d1 JD |
1077 | rcu_read_unlock(); |
1078 | } | |
1079 | ||
1080 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
1081 | struct ieee80211_mgmt *mgmt, size_t len, | |
1082 | struct ieee80211_rx_status *rx_status, | |
1083 | struct ieee802_11_elems *elems) | |
1084 | { | |
1085 | struct ieee80211_local *local = sdata->local; | |
1086 | struct cfg80211_bss *cbss; | |
1087 | struct ieee80211_bss *bss; | |
1088 | struct ieee80211_channel *channel; | |
1089 | u64 beacon_timestamp, rx_timestamp; | |
1090 | u32 supp_rates = 0; | |
57fbcce3 | 1091 | enum nl80211_band band = rx_status->band; |
8a4988d1 JD |
1092 | |
1093 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); | |
1094 | if (!channel) | |
1095 | return; | |
1096 | ||
1097 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); | |
1098 | ||
4abb52a4 | 1099 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); |
46900298 JB |
1100 | if (!bss) |
1101 | return; | |
1102 | ||
0c1ad2ca JB |
1103 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
1104 | ||
8cef2c9d JB |
1105 | /* same for beacon and probe response */ |
1106 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
46900298 JB |
1107 | |
1108 | /* check if we need to merge IBSS */ | |
1109 | ||
46900298 | 1110 | /* not an IBSS */ |
0c1ad2ca | 1111 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
1112 | goto put_bss; |
1113 | ||
1114 | /* different channel */ | |
55de908a | 1115 | if (sdata->u.ibss.fixed_channel && |
3aede78a | 1116 | sdata->u.ibss.chandef.chan != cbss->channel) |
46900298 JB |
1117 | goto put_bss; |
1118 | ||
1119 | /* different SSID */ | |
1120 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
1121 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
1122 | sdata->u.ibss.ssid_len)) | |
1123 | goto put_bss; | |
1124 | ||
cd7760e6 | 1125 | /* process channel switch */ |
d0a9123e | 1126 | if (sdata->vif.bss_conf.csa_active || |
82a8e17d | 1127 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) |
cd7760e6 SW |
1128 | goto put_bss; |
1129 | ||
34e8f082 | 1130 | /* same BSSID */ |
b203ca39 | 1131 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
34e8f082 AF |
1132 | goto put_bss; |
1133 | ||
cd7760e6 SW |
1134 | /* we use a fixed BSSID */ |
1135 | if (sdata->u.ibss.fixed_bssid) | |
1136 | goto put_bss; | |
1137 | ||
f4bda337 TP |
1138 | if (ieee80211_have_rx_timestamp(rx_status)) { |
1139 | /* time when timestamp field was received */ | |
1140 | rx_timestamp = | |
1141 | ieee80211_calculate_rx_timestamp(local, rx_status, | |
1142 | len + FCS_LEN, 24); | |
24487981 JB |
1143 | } else { |
1144 | /* | |
1145 | * second best option: get current TSF | |
1146 | * (will return -1 if not supported) | |
1147 | */ | |
37a41b4a | 1148 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 1149 | } |
46900298 | 1150 | |
c6e57b38 | 1151 | ibss_dbg(sdata, "RX beacon SA=%pM BSSID=%pM TSF=0x%llx\n", |
bdcbd8e0 | 1152 | mgmt->sa, mgmt->bssid, |
c6e57b38 EG |
1153 | (unsigned long long)rx_timestamp); |
1154 | ibss_dbg(sdata, "\tBCN=0x%llx diff=%lld @%lu\n", | |
bdcbd8e0 JB |
1155 | (unsigned long long)beacon_timestamp, |
1156 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
1157 | jiffies); | |
46900298 JB |
1158 | |
1159 | if (beacon_timestamp > rx_timestamp) { | |
bdcbd8e0 JB |
1160 | ibss_dbg(sdata, |
1161 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", | |
1162 | mgmt->bssid); | |
46900298 | 1163 | ieee80211_sta_join_ibss(sdata, bss); |
2103dec1 | 1164 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
34e89507 | 1165 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
52874a5e | 1166 | supp_rates); |
8bf11d8d | 1167 | rcu_read_unlock(); |
46900298 JB |
1168 | } |
1169 | ||
1170 | put_bss: | |
1171 | ieee80211_rx_bss_put(local, bss); | |
1172 | } | |
1173 | ||
8bf11d8d JB |
1174 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
1175 | const u8 *bssid, const u8 *addr, | |
1176 | u32 supp_rates) | |
46900298 | 1177 | { |
2e10d330 | 1178 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
1179 | struct ieee80211_local *local = sdata->local; |
1180 | struct sta_info *sta; | |
55de908a | 1181 | struct ieee80211_chanctx_conf *chanctx_conf; |
b422c6cd | 1182 | struct ieee80211_supported_band *sband; |
55de908a | 1183 | int band; |
46900298 | 1184 | |
af8cdcd8 JB |
1185 | /* |
1186 | * XXX: Consider removing the least recently used entry and | |
1187 | * allow new one to be added. | |
1188 | */ | |
46900298 | 1189 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
bdcbd8e0 | 1190 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
e87cc472 | 1191 | sdata->name, addr); |
8bf11d8d | 1192 | return; |
46900298 JB |
1193 | } |
1194 | ||
2e10d330 | 1195 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
8bf11d8d | 1196 | return; |
2e10d330 | 1197 | |
b203ca39 | 1198 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
8bf11d8d | 1199 | return; |
46900298 | 1200 | |
55de908a | 1201 | rcu_read_lock(); |
d0a9123e | 1202 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
1203 | if (WARN_ON_ONCE(!chanctx_conf)) { |
1204 | rcu_read_unlock(); | |
1205 | return; | |
1206 | } | |
4bf88530 | 1207 | band = chanctx_conf->def.chan->band; |
55de908a JB |
1208 | rcu_read_unlock(); |
1209 | ||
f36fe0a2 | 1210 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
46900298 | 1211 | if (!sta) |
8bf11d8d | 1212 | return; |
46900298 | 1213 | |
46900298 | 1214 | /* make sure mandatory rates are always added */ |
b422c6cd | 1215 | sband = local->hw.wiphy->bands[band]; |
046d2e7c | 1216 | sta->sta.deflink.supp_rates[band] = supp_rates | |
5add321c | 1217 | ieee80211_mandatory_rates(sband); |
46900298 | 1218 | |
8bf11d8d JB |
1219 | spin_lock(&ifibss->incomplete_lock); |
1220 | list_add(&sta->list, &ifibss->incomplete_stations); | |
1221 | spin_unlock(&ifibss->incomplete_lock); | |
16114496 | 1222 | wiphy_work_queue(local->hw.wiphy, &sdata->work); |
46900298 JB |
1223 | } |
1224 | ||
dad9defd AQ |
1225 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
1226 | { | |
4b08d1b6 | 1227 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
dad9defd AQ |
1228 | struct ieee80211_local *local = sdata->local; |
1229 | struct sta_info *sta, *tmp; | |
1230 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; | |
e5a9f8d0 | 1231 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
dad9defd | 1232 | |
4d3acf43 | 1233 | lockdep_assert_wiphy(local->hw.wiphy); |
dad9defd AQ |
1234 | |
1235 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { | |
b8da6b6a JB |
1236 | unsigned long last_active = ieee80211_sta_last_active(sta); |
1237 | ||
dad9defd AQ |
1238 | if (sdata != sta->sdata) |
1239 | continue; | |
1240 | ||
b8da6b6a JB |
1241 | if (time_is_before_jiffies(last_active + exp_time) || |
1242 | (time_is_before_jiffies(last_active + exp_rsn) && | |
dad9defd | 1243 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
4b08d1b6 JB |
1244 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
1245 | ||
dad9defd AQ |
1246 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
1247 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? | |
1248 | "not authorized " : "", sta->sta.addr); | |
1249 | ||
4b08d1b6 JB |
1250 | ieee80211_send_deauth_disassoc(sdata, sta->sta.addr, |
1251 | ifibss->bssid, | |
1252 | IEEE80211_STYPE_DEAUTH, | |
1253 | WLAN_REASON_DEAUTH_LEAVING, | |
1254 | true, frame_buf); | |
dad9defd AQ |
1255 | WARN_ON(__sta_info_destroy(sta)); |
1256 | } | |
1257 | } | |
dad9defd AQ |
1258 | } |
1259 | ||
ce9058ae BP |
1260 | /* |
1261 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
1262 | */ | |
46900298 JB |
1263 | |
1264 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
1265 | { | |
1266 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1267 | ||
076fc877 | 1268 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
7a17a33c | 1269 | |
af8cdcd8 JB |
1270 | mod_timer(&ifibss->timer, |
1271 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 1272 | |
dad9defd | 1273 | ieee80211_ibss_sta_expire(sdata); |
af8cdcd8 | 1274 | |
450aae3d S |
1275 | if (time_before(jiffies, ifibss->last_scan_completed + |
1276 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
1277 | return; | |
1278 | ||
46900298 JB |
1279 | if (ieee80211_sta_active_ibss(sdata)) |
1280 | return; | |
1281 | ||
c037b836 | 1282 | if (ifibss->fixed_channel) |
46900298 JB |
1283 | return; |
1284 | ||
bdcbd8e0 JB |
1285 | sdata_info(sdata, |
1286 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); | |
46900298 | 1287 | |
34bcf715 | 1288 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
5add321c | 1289 | NULL, 0); |
46900298 JB |
1290 | } |
1291 | ||
af8cdcd8 | 1292 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1293 | { |
1294 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 1295 | u8 bssid[ETH_ALEN]; |
46900298 JB |
1296 | u16 capability; |
1297 | int i; | |
1298 | ||
076fc877 | 1299 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
7a17a33c | 1300 | |
af8cdcd8 | 1301 | if (ifibss->fixed_bssid) { |
46900298 JB |
1302 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
1303 | } else { | |
1304 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
1305 | * own MAC address to make sure that devices that do not have proper | |
1306 | * random number generator get different BSSID. */ | |
1307 | get_random_bytes(bssid, ETH_ALEN); | |
1308 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 1309 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
1310 | bssid[0] &= ~0x01; |
1311 | bssid[0] |= 0x02; | |
1312 | } | |
1313 | ||
bdcbd8e0 | 1314 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
46900298 | 1315 | |
46900298 JB |
1316 | capability = WLAN_CAPABILITY_IBSS; |
1317 | ||
fffd0934 | 1318 | if (ifibss->privacy) |
46900298 | 1319 | capability |= WLAN_CAPABILITY_PRIVACY; |
46900298 | 1320 | |
57c4d7b4 | 1321 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
75a423f4 | 1322 | &ifibss->chandef, ifibss->basic_rates, |
c13a765b | 1323 | capability, 0, true); |
46900298 JB |
1324 | } |
1325 | ||
be50baa4 XG |
1326 | static unsigned int ibss_setup_channels(struct wiphy *wiphy, |
1327 | struct ieee80211_channel **channels, | |
1328 | unsigned int channels_max, | |
1329 | u32 center_freq, u32 width) | |
76bed0f4 JD |
1330 | { |
1331 | struct ieee80211_channel *chan = NULL; | |
1332 | unsigned int n_chan = 0; | |
1333 | u32 start_freq, end_freq, freq; | |
1334 | ||
1335 | if (width <= 20) { | |
1336 | start_freq = center_freq; | |
1337 | end_freq = center_freq; | |
1338 | } else { | |
1339 | start_freq = center_freq - width / 2 + 10; | |
1340 | end_freq = center_freq + width / 2 - 10; | |
1341 | } | |
1342 | ||
1343 | for (freq = start_freq; freq <= end_freq; freq += 20) { | |
1344 | chan = ieee80211_get_channel(wiphy, freq); | |
1345 | if (!chan) | |
1346 | continue; | |
1347 | if (n_chan >= channels_max) | |
1348 | return n_chan; | |
1349 | ||
1350 | channels[n_chan] = chan; | |
1351 | n_chan++; | |
1352 | } | |
1353 | ||
1354 | return n_chan; | |
1355 | } | |
1356 | ||
1357 | static unsigned int | |
1358 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, | |
1359 | const struct cfg80211_chan_def *chandef, | |
1360 | struct ieee80211_channel **channels, | |
1361 | unsigned int channels_max) | |
1362 | { | |
1363 | unsigned int n_chan = 0; | |
1364 | u32 width, cf1, cf2 = 0; | |
1365 | ||
1366 | switch (chandef->width) { | |
1367 | case NL80211_CHAN_WIDTH_40: | |
1368 | width = 40; | |
1369 | break; | |
1370 | case NL80211_CHAN_WIDTH_80P80: | |
1371 | cf2 = chandef->center_freq2; | |
fc0561dc | 1372 | fallthrough; |
76bed0f4 JD |
1373 | case NL80211_CHAN_WIDTH_80: |
1374 | width = 80; | |
1375 | break; | |
1376 | case NL80211_CHAN_WIDTH_160: | |
1377 | width = 160; | |
1378 | break; | |
1379 | default: | |
1380 | width = 20; | |
1381 | break; | |
1382 | } | |
1383 | ||
1384 | cf1 = chandef->center_freq1; | |
1385 | ||
1386 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); | |
1387 | ||
1388 | if (cf2) | |
1389 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], | |
1390 | channels_max - n_chan, cf2, | |
1391 | width); | |
1392 | ||
1393 | return n_chan; | |
1394 | } | |
1395 | ||
ce9058ae BP |
1396 | /* |
1397 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
1398 | */ | |
1399 | ||
af8cdcd8 | 1400 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
1401 | { |
1402 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1403 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 1404 | struct cfg80211_bss *cbss; |
af8cdcd8 | 1405 | struct ieee80211_channel *chan = NULL; |
46900298 JB |
1406 | const u8 *bssid = NULL; |
1407 | int active_ibss; | |
1408 | ||
076fc877 | 1409 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
7a17a33c | 1410 | |
46900298 | 1411 | active_ibss = ieee80211_sta_active_ibss(sdata); |
bdcbd8e0 | 1412 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
46900298 JB |
1413 | |
1414 | if (active_ibss) | |
af8cdcd8 | 1415 | return; |
46900298 | 1416 | |
af8cdcd8 JB |
1417 | if (ifibss->fixed_bssid) |
1418 | bssid = ifibss->bssid; | |
1419 | if (ifibss->fixed_channel) | |
3aede78a | 1420 | chan = ifibss->chandef.chan; |
af8cdcd8 | 1421 | if (!is_zero_ether_addr(ifibss->bssid)) |
46900298 | 1422 | bssid = ifibss->bssid; |
0c1ad2ca JB |
1423 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
1424 | ifibss->ssid, ifibss->ssid_len, | |
6eb18137 DL |
1425 | IEEE80211_BSS_TYPE_IBSS, |
1426 | IEEE80211_PRIVACY(ifibss->privacy)); | |
0c1ad2ca JB |
1427 | |
1428 | if (cbss) { | |
1429 | struct ieee80211_bss *bss; | |
46900298 | 1430 | |
0c1ad2ca | 1431 | bss = (void *)cbss->priv; |
bdcbd8e0 JB |
1432 | ibss_dbg(sdata, |
1433 | "sta_find_ibss: selected %pM current %pM\n", | |
1434 | cbss->bssid, ifibss->bssid); | |
1435 | sdata_info(sdata, | |
1436 | "Selected IBSS BSSID %pM based on configured SSID\n", | |
1437 | cbss->bssid); | |
46900298 | 1438 | |
af8cdcd8 | 1439 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 1440 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 1441 | return; |
d419b9f0 | 1442 | } |
46900298 | 1443 | |
d8eb741e AQ |
1444 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
1445 | * directly and do not waste time scanning | |
1446 | */ | |
1447 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { | |
1448 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", | |
1449 | bssid); | |
1450 | ieee80211_sta_create_ibss(sdata); | |
1451 | return; | |
1452 | } | |
1453 | ||
1454 | ||
bdcbd8e0 | 1455 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
46900298 JB |
1456 | |
1457 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 1458 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 | 1459 | IEEE80211_SCAN_INTERVAL)) { |
76bed0f4 JD |
1460 | struct ieee80211_channel *channels[8]; |
1461 | unsigned int num; | |
1462 | ||
bdcbd8e0 | 1463 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
46900298 | 1464 | |
d321cd01 SS |
1465 | if (ifibss->fixed_channel) { |
1466 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, | |
1467 | &ifibss->chandef, | |
1468 | channels, | |
1469 | ARRAY_SIZE(channels)); | |
1470 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
1471 | ifibss->ssid_len, channels, | |
5add321c | 1472 | num); |
d321cd01 SS |
1473 | } else { |
1474 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, | |
5add321c | 1475 | ifibss->ssid_len, NULL, 0); |
d321cd01 | 1476 | } |
ce9058ae | 1477 | } else { |
46900298 JB |
1478 | int interval = IEEE80211_SCAN_INTERVAL; |
1479 | ||
1480 | if (time_after(jiffies, ifibss->ibss_join_req + | |
55de908a JB |
1481 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
1482 | ieee80211_sta_create_ibss(sdata); | |
46900298 | 1483 | |
af8cdcd8 JB |
1484 | mod_timer(&ifibss->timer, |
1485 | round_jiffies(jiffies + interval)); | |
46900298 | 1486 | } |
46900298 JB |
1487 | } |
1488 | ||
1489 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 1490 | struct sk_buff *req) |
46900298 | 1491 | { |
c269a203 | 1492 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
1493 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
1494 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 1495 | int tx_last_beacon, len = req->len; |
46900298 | 1496 | struct sk_buff *skb; |
c3ffeab4 | 1497 | struct beacon_data *presp; |
46900298 JB |
1498 | u8 *pos, *end; |
1499 | ||
076fc877 | 1500 | lockdep_assert_wiphy(sdata->local->hw.wiphy); |
7a17a33c | 1501 | |
6858ad75 | 1502 | presp = sdata_dereference(ifibss->presp, sdata); |
40b275b6 | 1503 | |
46900298 | 1504 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 1505 | len < 24 + 2 || !presp) |
46900298 JB |
1506 | return; |
1507 | ||
24487981 | 1508 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 | 1509 | |
c6e57b38 EG |
1510 | ibss_dbg(sdata, "RX ProbeReq SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
1511 | ibss_dbg(sdata, "\tBSSID=%pM (tx_last_beacon=%d)\n", | |
1512 | mgmt->bssid, tx_last_beacon); | |
46900298 | 1513 | |
1ed76487 | 1514 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
1515 | return; |
1516 | ||
b203ca39 | 1517 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
888d04df | 1518 | !is_broadcast_ether_addr(mgmt->bssid)) |
46900298 JB |
1519 | return; |
1520 | ||
1521 | end = ((u8 *) mgmt) + len; | |
1522 | pos = mgmt->u.probe_req.variable; | |
1523 | if (pos[0] != WLAN_EID_SSID || | |
1524 | pos + 2 + pos[1] > end) { | |
bdcbd8e0 JB |
1525 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
1526 | mgmt->sa); | |
46900298 JB |
1527 | return; |
1528 | } | |
1529 | if (pos[1] != 0 && | |
1530 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 1531 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
1532 | /* Ignore ProbeReq for foreign SSID */ |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | /* Reply with ProbeResp */ | |
c3ffeab4 | 1537 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
46900298 JB |
1538 | if (!skb) |
1539 | return; | |
1540 | ||
c3ffeab4 | 1541 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 1542 | skb_put_data(skb, presp->head, presp->head_len); |
c3ffeab4 JB |
1543 | |
1544 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); | |
1545 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); | |
62ae67be | 1546 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
691eb61b SW |
1547 | |
1548 | /* avoid excessive retries for probe request to wildcard SSIDs */ | |
1549 | if (pos[1] == 0) | |
1550 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1551 | ||
62ae67be | 1552 | ieee80211_tx_skb(sdata, skb); |
46900298 JB |
1553 | } |
1554 | ||
d45c4172 EG |
1555 | static |
1556 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, | |
1557 | struct ieee80211_mgmt *mgmt, size_t len, | |
1558 | struct ieee80211_rx_status *rx_status) | |
46900298 JB |
1559 | { |
1560 | size_t baselen; | |
5d24828d | 1561 | struct ieee802_11_elems *elems; |
46900298 | 1562 | |
d45c4172 EG |
1563 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
1564 | offsetof(typeof(mgmt->u.beacon), variable)); | |
1565 | ||
1566 | /* | |
1567 | * either beacon or probe_resp but the variable field is at the | |
1568 | * same offset | |
1569 | */ | |
46900298 JB |
1570 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1571 | if (baselen > len) | |
1572 | return; | |
1573 | ||
5d24828d | 1574 | elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, |
38c6aa29 | 1575 | len - baselen, false, NULL); |
46900298 | 1576 | |
5d24828d JB |
1577 | if (elems) { |
1578 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, elems); | |
1579 | kfree(elems); | |
1580 | } | |
46900298 JB |
1581 | } |
1582 | ||
1fa57d01 JB |
1583 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1584 | struct sk_buff *skb) | |
46900298 JB |
1585 | { |
1586 | struct ieee80211_rx_status *rx_status; | |
1587 | struct ieee80211_mgmt *mgmt; | |
1588 | u16 fc; | |
5d24828d | 1589 | struct ieee802_11_elems *elems; |
cd7760e6 | 1590 | int ies_len; |
46900298 | 1591 | |
f1d58c25 | 1592 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
1593 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1594 | fc = le16_to_cpu(mgmt->frame_control); | |
1595 | ||
c926d006 | 1596 | if (!sdata->u.ibss.ssid_len) |
076fc877 | 1597 | return; /* not ready to merge yet */ |
c926d006 | 1598 | |
46900298 JB |
1599 | switch (fc & IEEE80211_FCTL_STYPE) { |
1600 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 1601 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
1602 | break; |
1603 | case IEEE80211_STYPE_PROBE_RESP: | |
46900298 | 1604 | case IEEE80211_STYPE_BEACON: |
d45c4172 EG |
1605 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
1606 | rx_status); | |
46900298 JB |
1607 | break; |
1608 | case IEEE80211_STYPE_AUTH: | |
1609 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
1610 | break; | |
2cc59e78 AQ |
1611 | case IEEE80211_STYPE_DEAUTH: |
1612 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); | |
1613 | break; | |
cd7760e6 SW |
1614 | case IEEE80211_STYPE_ACTION: |
1615 | switch (mgmt->u.action.category) { | |
1616 | case WLAN_CATEGORY_SPECTRUM_MGMT: | |
1617 | ies_len = skb->len - | |
1618 | offsetof(struct ieee80211_mgmt, | |
1619 | u.action.u.chan_switch.variable); | |
1620 | ||
1621 | if (ies_len < 0) | |
1622 | break; | |
1623 | ||
5d24828d | 1624 | elems = ieee802_11_parse_elems( |
cd7760e6 | 1625 | mgmt->u.action.u.chan_switch.variable, |
38c6aa29 | 1626 | ies_len, true, NULL); |
cd7760e6 | 1627 | |
8223ac19 JB |
1628 | if (elems && !elems->parse_error) |
1629 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, | |
1630 | skb->len, | |
1631 | rx_status, | |
1632 | elems); | |
5d24828d | 1633 | kfree(elems); |
cd7760e6 SW |
1634 | break; |
1635 | } | |
46900298 | 1636 | } |
46900298 JB |
1637 | } |
1638 | ||
1fa57d01 | 1639 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 1640 | { |
1fa57d01 | 1641 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
8bf11d8d | 1642 | struct sta_info *sta; |
46900298 | 1643 | |
7a17a33c JB |
1644 | /* |
1645 | * Work could be scheduled after scan or similar | |
1646 | * when we aren't even joined (or trying) with a | |
1647 | * network. | |
1648 | */ | |
1649 | if (!ifibss->ssid_len) | |
076fc877 | 1650 | return; |
46900298 | 1651 | |
8bf11d8d JB |
1652 | spin_lock_bh(&ifibss->incomplete_lock); |
1653 | while (!list_empty(&ifibss->incomplete_stations)) { | |
1654 | sta = list_first_entry(&ifibss->incomplete_stations, | |
1655 | struct sta_info, list); | |
1656 | list_del(&sta->list); | |
1657 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1658 | ||
52874a5e | 1659 | ieee80211_ibss_finish_sta(sta); |
8bf11d8d JB |
1660 | rcu_read_unlock(); |
1661 | spin_lock_bh(&ifibss->incomplete_lock); | |
1662 | } | |
1663 | spin_unlock_bh(&ifibss->incomplete_lock); | |
1664 | ||
46900298 JB |
1665 | switch (ifibss->state) { |
1666 | case IEEE80211_IBSS_MLME_SEARCH: | |
1667 | ieee80211_sta_find_ibss(sdata); | |
1668 | break; | |
1669 | case IEEE80211_IBSS_MLME_JOINED: | |
1670 | ieee80211_sta_merge_ibss(sdata); | |
1671 | break; | |
1672 | default: | |
1673 | WARN_ON(1); | |
1674 | break; | |
1675 | } | |
3a4d4aa2 JB |
1676 | } |
1677 | ||
34f11cd3 | 1678 | static void ieee80211_ibss_timer(struct timer_list *t) |
46900298 JB |
1679 | { |
1680 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 1681 | from_timer(sdata, t, u.ibss.timer); |
5bb644a0 | 1682 | |
16114496 | 1683 | wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); |
5bb644a0 | 1684 | } |
5bb644a0 | 1685 | |
46900298 JB |
1686 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
1687 | { | |
1688 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
1689 | ||
34f11cd3 | 1690 | timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0); |
8bf11d8d JB |
1691 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
1692 | spin_lock_init(&ifibss->incomplete_lock); | |
87351d09 JB |
1693 | wiphy_work_init(&ifibss->csa_connection_drop_work, |
1694 | ieee80211_csa_connection_drop_work); | |
46900298 JB |
1695 | } |
1696 | ||
1697 | /* scan finished notification */ | |
1698 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
1699 | { | |
af8cdcd8 | 1700 | struct ieee80211_sub_if_data *sdata; |
46900298 | 1701 | |
be0df01d JB |
1702 | lockdep_assert_wiphy(local->hw.wiphy); |
1703 | ||
29b4a4f7 | 1704 | list_for_each_entry(sdata, &local->interfaces, list) { |
9607e6b6 | 1705 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 1706 | continue; |
af8cdcd8 JB |
1707 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
1708 | continue; | |
1709 | sdata->u.ibss.last_scan_completed = jiffies; | |
46900298 JB |
1710 | } |
1711 | } | |
1712 | ||
af8cdcd8 JB |
1713 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
1714 | struct cfg80211_ibss_params *params) | |
1715 | { | |
15ddba5f | 1716 | u64 changed = 0; |
2103dec1 SW |
1717 | u32 rate_flags; |
1718 | struct ieee80211_supported_band *sband; | |
71965c1d LC |
1719 | enum ieee80211_chanctx_mode chanmode; |
1720 | struct ieee80211_local *local = sdata->local; | |
1721 | int radar_detect_width = 0; | |
2103dec1 | 1722 | int i; |
71965c1d LC |
1723 | int ret; |
1724 | ||
5435af6e JB |
1725 | lockdep_assert_wiphy(local->hw.wiphy); |
1726 | ||
b6011960 TP |
1727 | if (params->chandef.chan->freq_offset) { |
1728 | /* this may work, but is untested */ | |
1729 | return -EOPNOTSUPP; | |
1730 | } | |
1731 | ||
71965c1d LC |
1732 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, |
1733 | ¶ms->chandef, | |
1734 | sdata->wdev.iftype); | |
1735 | if (ret < 0) | |
1736 | return ret; | |
1737 | ||
1738 | if (ret > 0) { | |
1739 | if (!params->userspace_handles_dfs) | |
1740 | return -EINVAL; | |
1741 | radar_detect_width = BIT(params->chandef.width); | |
1742 | } | |
1743 | ||
1744 | chanmode = (params->channel_fixed && !ret) ? | |
1745 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; | |
1746 | ||
71965c1d LC |
1747 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, |
1748 | radar_detect_width); | |
71965c1d LC |
1749 | if (ret < 0) |
1750 | return ret; | |
af8cdcd8 | 1751 | |
af8cdcd8 JB |
1752 | if (params->bssid) { |
1753 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
1754 | sdata->u.ibss.fixed_bssid = true; | |
1755 | } else | |
1756 | sdata->u.ibss.fixed_bssid = false; | |
1757 | ||
fffd0934 | 1758 | sdata->u.ibss.privacy = params->privacy; |
267335d6 | 1759 | sdata->u.ibss.control_port = params->control_port; |
8e8d347d | 1760 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
fbd2c8dc | 1761 | sdata->u.ibss.basic_rates = params->basic_rates; |
c7d37a66 | 1762 | sdata->u.ibss.last_scan_completed = jiffies; |
2103dec1 SW |
1763 | |
1764 | /* fix basic_rates if channel does not support these rates */ | |
1765 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); | |
71965c1d | 1766 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
2103dec1 SW |
1767 | for (i = 0; i < sband->n_bitrates; i++) { |
1768 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) | |
1769 | sdata->u.ibss.basic_rates &= ~BIT(i); | |
1770 | } | |
dd5b4cc7 FF |
1771 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
1772 | sizeof(params->mcast_rate)); | |
fffd0934 | 1773 | |
57c4d7b4 JB |
1774 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
1775 | ||
3aede78a | 1776 | sdata->u.ibss.chandef = params->chandef; |
af8cdcd8 JB |
1777 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
1778 | ||
1779 | if (params->ie) { | |
1780 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
1781 | GFP_KERNEL); | |
1782 | if (sdata->u.ibss.ie) | |
1783 | sdata->u.ibss.ie_len = params->ie_len; | |
1784 | } | |
1785 | ||
af8cdcd8 JB |
1786 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
1787 | sdata->u.ibss.ibss_join_req = jiffies; | |
1788 | ||
badecb00 | 1789 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
0e41f715 JB |
1790 | sdata->u.ibss.ssid_len = params->ssid_len; |
1791 | ||
822854b0 SW |
1792 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
1793 | sizeof(sdata->u.ibss.ht_capa)); | |
1794 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, | |
1795 | sizeof(sdata->u.ibss.ht_capa_mask)); | |
1796 | ||
ff3cc5f4 SW |
1797 | /* |
1798 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
1799 | * reserved, but an HT STA shall protect HT transmissions as though | |
1800 | * the HT Protection field were set to non-HT mixed mode. | |
1801 | * | |
1802 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
1803 | * also reserved, but an HT STA shall operate as though this field | |
1804 | * were set to 1. | |
1805 | */ | |
1806 | ||
1807 | sdata->vif.bss_conf.ht_operation_mode |= | |
1808 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
1809 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
1810 | ||
dcbe73ca | 1811 | changed |= BSS_CHANGED_HT | BSS_CHANGED_MCAST_RATE; |
d8675a63 | 1812 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); |
ff3cc5f4 | 1813 | |
bfd8403a JB |
1814 | sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; |
1815 | sdata->deflink.needed_rx_chains = local->rx_chains; | |
018f6fbf | 1816 | sdata->control_port_over_nl80211 = params->control_port_over_nl80211; |
04ecd257 | 1817 | |
16114496 | 1818 | wiphy_work_queue(local->hw.wiphy, &sdata->work); |
af8cdcd8 JB |
1819 | |
1820 | return 0; | |
1821 | } | |
1822 | ||
1823 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
1824 | { | |
5ea096c0 | 1825 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
5ea096c0 | 1826 | |
871a4180 | 1827 | ieee80211_ibss_disconnect(sdata); |
b78a4932 | 1828 | ifibss->ssid_len = 0; |
c84a67a2 | 1829 | eth_zero_addr(ifibss->bssid); |
af8cdcd8 JB |
1830 | |
1831 | /* remove beacon */ | |
1832 | kfree(sdata->u.ibss.ie); | |
3bd801b1 MT |
1833 | sdata->u.ibss.ie = NULL; |
1834 | sdata->u.ibss.ie_len = 0; | |
822854b0 SW |
1835 | |
1836 | /* on the next join, re-program HT parameters */ | |
1837 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); | |
1838 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); | |
1839 | ||
af8cdcd8 | 1840 | synchronize_rcu(); |
af8cdcd8 | 1841 | |
35f20c14 | 1842 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1843 | |
bc05d19f | 1844 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c | 1845 | |
af8cdcd8 JB |
1846 | return 0; |
1847 | } |