Commit | Line | Data |
---|---|---|
46900298 JB |
1 | /* |
2 | * IBSS mode implementation | |
3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
46900298 JB |
17 | #include <linux/if_ether.h> |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/if_arp.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/rtnetlink.h> | |
22 | #include <net/mac80211.h> | |
23 | #include <asm/unaligned.h> | |
24 | ||
25 | #include "ieee80211_i.h" | |
24487981 | 26 | #include "driver-ops.h" |
46900298 JB |
27 | #include "rate.h" |
28 | ||
29 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
30 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
31 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) | |
32 | ||
33 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
34 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
35 | ||
36 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
37 | ||
38 | ||
39 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, | |
40 | struct ieee80211_mgmt *mgmt, | |
41 | size_t len) | |
42 | { | |
0915cba3 | 43 | u16 auth_alg, auth_transaction; |
46900298 | 44 | |
7a17a33c JB |
45 | lockdep_assert_held(&sdata->u.ibss.mtx); |
46 | ||
46900298 JB |
47 | if (len < 24 + 6) |
48 | return; | |
49 | ||
50 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
51 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
46900298 JB |
52 | |
53 | /* | |
54 | * IEEE 802.11 standard does not require authentication in IBSS | |
55 | * networks and most implementations do not seem to use it. | |
56 | * However, try to reply to authentication attempts if someone | |
57 | * has actually implemented this. | |
58 | */ | |
59 | if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) | |
60 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, NULL, 0, | |
fffd0934 | 61 | sdata->u.ibss.bssid, NULL, 0, 0); |
46900298 JB |
62 | } |
63 | ||
af8cdcd8 JB |
64 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
65 | const u8 *bssid, const int beacon_int, | |
66 | struct ieee80211_channel *chan, | |
b59066a2 | 67 | const u32 basic_rates, |
af8cdcd8 | 68 | const u16 capability, u64 tsf) |
46900298 JB |
69 | { |
70 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
71 | struct ieee80211_local *local = sdata->local; | |
b59066a2 | 72 | int rates, i; |
46900298 JB |
73 | struct sk_buff *skb; |
74 | struct ieee80211_mgmt *mgmt; | |
75 | u8 *pos; | |
76 | struct ieee80211_supported_band *sband; | |
f446d10f | 77 | struct cfg80211_bss *bss; |
57c4d7b4 | 78 | u32 bss_change; |
b59066a2 | 79 | u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; |
24487981 | 80 | |
7a17a33c JB |
81 | lockdep_assert_held(&ifibss->mtx); |
82 | ||
24487981 | 83 | /* Reset own TSF to allow time synchronization work. */ |
37a41b4a | 84 | drv_reset_tsf(local, sdata); |
46900298 | 85 | |
af8cdcd8 | 86 | skb = ifibss->skb; |
a9b3cd7f | 87 | RCU_INIT_POINTER(ifibss->presp, NULL); |
af8cdcd8 JB |
88 | synchronize_rcu(); |
89 | skb->data = skb->head; | |
90 | skb->len = 0; | |
91 | skb_reset_tail_pointer(skb); | |
92 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
46900298 | 93 | |
af8cdcd8 JB |
94 | if (memcmp(ifibss->bssid, bssid, ETH_ALEN)) |
95 | sta_info_flush(sdata->local, sdata); | |
46900298 | 96 | |
49b5c7f4 JB |
97 | /* if merging, indicate to driver that we leave the old IBSS */ |
98 | if (sdata->vif.bss_conf.ibss_joined) { | |
99 | sdata->vif.bss_conf.ibss_joined = false; | |
86a2ea41 | 100 | netif_carrier_off(sdata->dev); |
49b5c7f4 JB |
101 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); |
102 | } | |
103 | ||
46900298 | 104 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
46900298 | 105 | |
af8cdcd8 | 106 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
46900298 | 107 | |
af8cdcd8 | 108 | local->oper_channel = chan; |
0aaffa9b | 109 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); |
af8cdcd8 | 110 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
57c4d7b4 | 111 | |
af8cdcd8 | 112 | sband = local->hw.wiphy->bands[chan->band]; |
46900298 | 113 | |
b59066a2 JB |
114 | /* build supported rates array */ |
115 | pos = supp_rates; | |
116 | for (i = 0; i < sband->n_bitrates; i++) { | |
117 | int rate = sband->bitrates[i].bitrate; | |
118 | u8 basic = 0; | |
119 | if (basic_rates & BIT(i)) | |
120 | basic = 0x80; | |
121 | *pos++ = basic | (u8) (rate / 5); | |
122 | } | |
123 | ||
46900298 | 124 | /* Build IBSS probe response */ |
af8cdcd8 | 125 | mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); |
46900298 JB |
126 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); |
127 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
128 | IEEE80211_STYPE_PROBE_RESP); | |
129 | memset(mgmt->da, 0xff, ETH_ALEN); | |
47846c9b | 130 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 131 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
57c4d7b4 | 132 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
707c1b4e | 133 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
46900298 JB |
134 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
135 | ||
136 | pos = skb_put(skb, 2 + ifibss->ssid_len); | |
137 | *pos++ = WLAN_EID_SSID; | |
138 | *pos++ = ifibss->ssid_len; | |
139 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); | |
140 | ||
b59066a2 | 141 | rates = sband->n_bitrates; |
46900298 JB |
142 | if (rates > 8) |
143 | rates = 8; | |
144 | pos = skb_put(skb, 2 + rates); | |
145 | *pos++ = WLAN_EID_SUPP_RATES; | |
146 | *pos++ = rates; | |
147 | memcpy(pos, supp_rates, rates); | |
148 | ||
149 | if (sband->band == IEEE80211_BAND_2GHZ) { | |
150 | pos = skb_put(skb, 2 + 1); | |
151 | *pos++ = WLAN_EID_DS_PARAMS; | |
152 | *pos++ = 1; | |
af8cdcd8 | 153 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
46900298 JB |
154 | } |
155 | ||
156 | pos = skb_put(skb, 2 + 2); | |
157 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
158 | *pos++ = 2; | |
159 | /* FIX: set ATIM window based on scan results */ | |
160 | *pos++ = 0; | |
161 | *pos++ = 0; | |
162 | ||
b59066a2 JB |
163 | if (sband->n_bitrates > 8) { |
164 | rates = sband->n_bitrates - 8; | |
46900298 JB |
165 | pos = skb_put(skb, 2 + rates); |
166 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
167 | *pos++ = rates; | |
168 | memcpy(pos, &supp_rates[8], rates); | |
169 | } | |
170 | ||
af8cdcd8 JB |
171 | if (ifibss->ie_len) |
172 | memcpy(skb_put(skb, ifibss->ie_len), | |
173 | ifibss->ie, ifibss->ie_len); | |
174 | ||
9eba6125 BR |
175 | if (local->hw.queues >= 4) { |
176 | pos = skb_put(skb, 9); | |
177 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
178 | *pos++ = 7; /* len */ | |
179 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
180 | *pos++ = 0x50; | |
181 | *pos++ = 0xf2; | |
182 | *pos++ = 2; /* WME */ | |
183 | *pos++ = 0; /* WME info */ | |
184 | *pos++ = 1; /* WME ver */ | |
185 | *pos++ = 0; /* U-APSD no in use */ | |
186 | } | |
187 | ||
a9b3cd7f | 188 | RCU_INIT_POINTER(ifibss->presp, skb); |
46900298 | 189 | |
2d0ddec5 | 190 | sdata->vif.bss_conf.beacon_int = beacon_int; |
fbd2c8dc | 191 | sdata->vif.bss_conf.basic_rates = basic_rates; |
2d0ddec5 JB |
192 | bss_change = BSS_CHANGED_BEACON_INT; |
193 | bss_change |= ieee80211_reset_erp_info(sdata); | |
194 | bss_change |= BSS_CHANGED_BSSID; | |
195 | bss_change |= BSS_CHANGED_BEACON; | |
196 | bss_change |= BSS_CHANGED_BEACON_ENABLED; | |
392cfdb1 | 197 | bss_change |= BSS_CHANGED_BASIC_RATES; |
8fc214ba JB |
198 | bss_change |= BSS_CHANGED_IBSS; |
199 | sdata->vif.bss_conf.ibss_joined = true; | |
2d0ddec5 | 200 | ieee80211_bss_info_change_notify(sdata, bss_change); |
46900298 | 201 | |
b59066a2 | 202 | ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); |
46900298 | 203 | |
46900298 | 204 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
af8cdcd8 JB |
205 | mod_timer(&ifibss->timer, |
206 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 | 207 | |
f446d10f JB |
208 | bss = cfg80211_inform_bss_frame(local->hw.wiphy, local->hw.conf.channel, |
209 | mgmt, skb->len, 0, GFP_KERNEL); | |
210 | cfg80211_put_bss(bss); | |
86a2ea41 | 211 | netif_carrier_on(sdata->dev); |
af8cdcd8 | 212 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
46900298 JB |
213 | } |
214 | ||
af8cdcd8 JB |
215 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
216 | struct ieee80211_bss *bss) | |
46900298 | 217 | { |
0c1ad2ca JB |
218 | struct cfg80211_bss *cbss = |
219 | container_of((void *)bss, struct cfg80211_bss, priv); | |
b59066a2 JB |
220 | struct ieee80211_supported_band *sband; |
221 | u32 basic_rates; | |
222 | int i, j; | |
0c1ad2ca | 223 | u16 beacon_int = cbss->beacon_interval; |
57c4d7b4 | 224 | |
7a17a33c JB |
225 | lockdep_assert_held(&sdata->u.ibss.mtx); |
226 | ||
57c4d7b4 JB |
227 | if (beacon_int < 10) |
228 | beacon_int = 10; | |
229 | ||
0c1ad2ca | 230 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
b59066a2 JB |
231 | |
232 | basic_rates = 0; | |
233 | ||
234 | for (i = 0; i < bss->supp_rates_len; i++) { | |
235 | int rate = (bss->supp_rates[i] & 0x7f) * 5; | |
236 | bool is_basic = !!(bss->supp_rates[i] & 0x80); | |
237 | ||
238 | for (j = 0; j < sband->n_bitrates; j++) { | |
239 | if (sband->bitrates[j].bitrate == rate) { | |
240 | if (is_basic) | |
241 | basic_rates |= BIT(j); | |
242 | break; | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
0c1ad2ca | 247 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
57c4d7b4 | 248 | beacon_int, |
0c1ad2ca | 249 | cbss->channel, |
b59066a2 | 250 | basic_rates, |
0c1ad2ca JB |
251 | cbss->capability, |
252 | cbss->tsf); | |
46900298 JB |
253 | } |
254 | ||
255 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, | |
256 | struct ieee80211_mgmt *mgmt, | |
257 | size_t len, | |
258 | struct ieee80211_rx_status *rx_status, | |
259 | struct ieee802_11_elems *elems, | |
260 | bool beacon) | |
261 | { | |
262 | struct ieee80211_local *local = sdata->local; | |
263 | int freq; | |
0c1ad2ca | 264 | struct cfg80211_bss *cbss; |
46900298 JB |
265 | struct ieee80211_bss *bss; |
266 | struct sta_info *sta; | |
267 | struct ieee80211_channel *channel; | |
268 | u64 beacon_timestamp, rx_timestamp; | |
269 | u32 supp_rates = 0; | |
270 | enum ieee80211_band band = rx_status->band; | |
271 | ||
272 | if (elems->ds_params && elems->ds_params_len == 1) | |
59eb21a6 BR |
273 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
274 | band); | |
46900298 JB |
275 | else |
276 | freq = rx_status->freq; | |
277 | ||
278 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
279 | ||
280 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
281 | return; | |
282 | ||
9eba6125 | 283 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
46900298 | 284 | memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) { |
46900298 JB |
285 | |
286 | rcu_read_lock(); | |
abe60632 | 287 | sta = sta_info_get(sdata, mgmt->sa); |
46900298 | 288 | |
9eba6125 BR |
289 | if (elems->supp_rates) { |
290 | supp_rates = ieee80211_sta_get_rates(local, elems, | |
291 | band); | |
292 | if (sta) { | |
293 | u32 prev_rates; | |
294 | ||
295 | prev_rates = sta->sta.supp_rates[band]; | |
296 | /* make sure mandatory rates are always added */ | |
297 | sta->sta.supp_rates[band] = supp_rates | | |
298 | ieee80211_mandatory_rates(local, band); | |
46900298 | 299 | |
9eba6125 | 300 | if (sta->sta.supp_rates[band] != prev_rates) { |
46900298 | 301 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
9eba6125 BR |
302 | printk(KERN_DEBUG |
303 | "%s: updated supp_rates set " | |
304 | "for %pM based on beacon" | |
305 | "/probe_resp (0x%x -> 0x%x)\n", | |
306 | sdata->name, sta->sta.addr, | |
307 | prev_rates, | |
308 | sta->sta.supp_rates[band]); | |
46900298 | 309 | #endif |
9eba6125 BR |
310 | rate_control_rate_init(sta); |
311 | } | |
312 | } else | |
313 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, | |
314 | mgmt->sa, supp_rates, | |
315 | GFP_ATOMIC); | |
34e89507 | 316 | } |
9eba6125 BR |
317 | |
318 | if (sta && elems->wmm_info) | |
c2c98fde | 319 | set_sta_flag(sta, WLAN_STA_WME); |
9eba6125 BR |
320 | |
321 | rcu_read_unlock(); | |
46900298 JB |
322 | } |
323 | ||
324 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, | |
325 | channel, beacon); | |
326 | if (!bss) | |
327 | return; | |
328 | ||
0c1ad2ca JB |
329 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
330 | ||
46900298 | 331 | /* was just updated in ieee80211_bss_info_update */ |
0c1ad2ca | 332 | beacon_timestamp = cbss->tsf; |
46900298 JB |
333 | |
334 | /* check if we need to merge IBSS */ | |
335 | ||
46900298 | 336 | /* we use a fixed BSSID */ |
a98bfec2 | 337 | if (sdata->u.ibss.fixed_bssid) |
46900298 JB |
338 | goto put_bss; |
339 | ||
340 | /* not an IBSS */ | |
0c1ad2ca | 341 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
46900298 JB |
342 | goto put_bss; |
343 | ||
344 | /* different channel */ | |
0c1ad2ca | 345 | if (cbss->channel != local->oper_channel) |
46900298 JB |
346 | goto put_bss; |
347 | ||
348 | /* different SSID */ | |
349 | if (elems->ssid_len != sdata->u.ibss.ssid_len || | |
350 | memcmp(elems->ssid, sdata->u.ibss.ssid, | |
351 | sdata->u.ibss.ssid_len)) | |
352 | goto put_bss; | |
353 | ||
34e8f082 | 354 | /* same BSSID */ |
0c1ad2ca | 355 | if (memcmp(cbss->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) |
34e8f082 AF |
356 | goto put_bss; |
357 | ||
6ebacbb7 | 358 | if (rx_status->flag & RX_FLAG_MACTIME_MPDU) { |
46900298 JB |
359 | /* |
360 | * For correct IBSS merging we need mactime; since mactime is | |
361 | * defined as the time the first data symbol of the frame hits | |
362 | * the PHY, and the timestamp of the beacon is defined as "the | |
363 | * time that the data symbol containing the first bit of the | |
364 | * timestamp is transmitted to the PHY plus the transmitting | |
365 | * STA's delays through its local PHY from the MAC-PHY | |
366 | * interface to its interface with the WM" (802.11 11.1.2) | |
367 | * - equals the time this bit arrives at the receiver - we have | |
368 | * to take into account the offset between the two. | |
369 | * | |
370 | * E.g. at 1 MBit that means mactime is 192 usec earlier | |
371 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
372 | */ | |
373 | int rate; | |
374 | ||
375 | if (rx_status->flag & RX_FLAG_HT) | |
376 | rate = 65; /* TODO: HT rates */ | |
377 | else | |
378 | rate = local->hw.wiphy->bands[band]-> | |
379 | bitrates[rx_status->rate_idx].bitrate; | |
380 | ||
381 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
24487981 JB |
382 | } else { |
383 | /* | |
384 | * second best option: get current TSF | |
385 | * (will return -1 if not supported) | |
386 | */ | |
37a41b4a | 387 | rx_timestamp = drv_get_tsf(local, sdata); |
24487981 | 388 | } |
46900298 JB |
389 | |
390 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
391 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" | |
392 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
393 | mgmt->sa, mgmt->bssid, | |
394 | (unsigned long long)rx_timestamp, | |
395 | (unsigned long long)beacon_timestamp, | |
396 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
397 | jiffies); | |
398 | #endif | |
399 | ||
400 | if (beacon_timestamp > rx_timestamp) { | |
401 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
402 | printk(KERN_DEBUG "%s: beacon TSF higher than " | |
403 | "local TSF - IBSS merge with BSSID %pM\n", | |
47846c9b | 404 | sdata->name, mgmt->bssid); |
46900298 JB |
405 | #endif |
406 | ieee80211_sta_join_ibss(sdata, bss); | |
09a08cff | 407 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
34e89507 JB |
408 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
409 | supp_rates, GFP_KERNEL); | |
46900298 JB |
410 | } |
411 | ||
412 | put_bss: | |
413 | ieee80211_rx_bss_put(local, bss); | |
414 | } | |
415 | ||
416 | /* | |
417 | * Add a new IBSS station, will also be called by the RX code when, | |
418 | * in IBSS mode, receiving a frame from a yet-unknown station, hence | |
419 | * must be callable in atomic context. | |
420 | */ | |
421 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, | |
a7ce1c94 | 422 | u8 *bssid, u8 *addr, u32 supp_rates, |
34e89507 | 423 | gfp_t gfp) |
46900298 | 424 | { |
2e10d330 | 425 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 JB |
426 | struct ieee80211_local *local = sdata->local; |
427 | struct sta_info *sta; | |
428 | int band = local->hw.conf.channel->band; | |
429 | ||
af8cdcd8 JB |
430 | /* |
431 | * XXX: Consider removing the least recently used entry and | |
432 | * allow new one to be added. | |
433 | */ | |
46900298 | 434 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
af8cdcd8 JB |
435 | if (net_ratelimit()) |
436 | printk(KERN_DEBUG "%s: No room for a new IBSS STA entry %pM\n", | |
47846c9b | 437 | sdata->name, addr); |
46900298 JB |
438 | return NULL; |
439 | } | |
440 | ||
2e10d330 FF |
441 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
442 | return NULL; | |
443 | ||
46900298 JB |
444 | if (compare_ether_addr(bssid, sdata->u.ibss.bssid)) |
445 | return NULL; | |
446 | ||
447 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
0fb9a9ec JP |
448 | wiphy_debug(local->hw.wiphy, "Adding new IBSS station %pM (dev=%s)\n", |
449 | addr, sdata->name); | |
46900298 JB |
450 | #endif |
451 | ||
34e89507 | 452 | sta = sta_info_alloc(sdata, addr, gfp); |
46900298 JB |
453 | if (!sta) |
454 | return NULL; | |
455 | ||
c8716d9d | 456 | sta->last_rx = jiffies; |
c2c98fde | 457 | set_sta_flag(sta, WLAN_STA_AUTHORIZED); |
46900298 JB |
458 | |
459 | /* make sure mandatory rates are always added */ | |
460 | sta->sta.supp_rates[band] = supp_rates | | |
461 | ieee80211_mandatory_rates(local, band); | |
462 | ||
463 | rate_control_rate_init(sta); | |
464 | ||
34e89507 | 465 | /* If it fails, maybe we raced another insertion? */ |
46900298 | 466 | if (sta_info_insert(sta)) |
34e89507 | 467 | return sta_info_get(sdata, addr); |
46900298 JB |
468 | return sta; |
469 | } | |
470 | ||
471 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) | |
472 | { | |
473 | struct ieee80211_local *local = sdata->local; | |
474 | int active = 0; | |
475 | struct sta_info *sta; | |
476 | ||
7a17a33c JB |
477 | lockdep_assert_held(&sdata->u.ibss.mtx); |
478 | ||
46900298 JB |
479 | rcu_read_lock(); |
480 | ||
481 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
482 | if (sta->sdata == sdata && | |
483 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
484 | jiffies)) { | |
485 | active++; | |
486 | break; | |
487 | } | |
488 | } | |
489 | ||
490 | rcu_read_unlock(); | |
491 | ||
492 | return active; | |
493 | } | |
494 | ||
ce9058ae BP |
495 | /* |
496 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED | |
497 | */ | |
46900298 JB |
498 | |
499 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) | |
500 | { | |
501 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
502 | ||
7a17a33c JB |
503 | lockdep_assert_held(&ifibss->mtx); |
504 | ||
af8cdcd8 JB |
505 | mod_timer(&ifibss->timer, |
506 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); | |
46900298 JB |
507 | |
508 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); | |
af8cdcd8 | 509 | |
450aae3d S |
510 | if (time_before(jiffies, ifibss->last_scan_completed + |
511 | IEEE80211_IBSS_MERGE_INTERVAL)) | |
512 | return; | |
513 | ||
46900298 JB |
514 | if (ieee80211_sta_active_ibss(sdata)) |
515 | return; | |
516 | ||
af8cdcd8 | 517 | if (ifibss->fixed_channel) |
46900298 JB |
518 | return; |
519 | ||
520 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
47846c9b | 521 | "IBSS networks with same SSID (merge)\n", sdata->name); |
46900298 | 522 | |
be4a4b6a JB |
523 | ieee80211_request_internal_scan(sdata, |
524 | ifibss->ssid, ifibss->ssid_len, | |
525 | ifibss->fixed_channel ? ifibss->channel : NULL); | |
46900298 JB |
526 | } |
527 | ||
af8cdcd8 | 528 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
529 | { |
530 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
46900298 | 531 | u8 bssid[ETH_ALEN]; |
46900298 JB |
532 | u16 capability; |
533 | int i; | |
534 | ||
7a17a33c JB |
535 | lockdep_assert_held(&ifibss->mtx); |
536 | ||
af8cdcd8 | 537 | if (ifibss->fixed_bssid) { |
46900298 JB |
538 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
539 | } else { | |
540 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
541 | * own MAC address to make sure that devices that do not have proper | |
542 | * random number generator get different BSSID. */ | |
543 | get_random_bytes(bssid, ETH_ALEN); | |
544 | for (i = 0; i < ETH_ALEN; i++) | |
47846c9b | 545 | bssid[i] ^= sdata->vif.addr[i]; |
46900298 JB |
546 | bssid[0] &= ~0x01; |
547 | bssid[0] |= 0x02; | |
548 | } | |
549 | ||
550 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", | |
47846c9b | 551 | sdata->name, bssid); |
46900298 | 552 | |
46900298 JB |
553 | capability = WLAN_CAPABILITY_IBSS; |
554 | ||
fffd0934 | 555 | if (ifibss->privacy) |
46900298 JB |
556 | capability |= WLAN_CAPABILITY_PRIVACY; |
557 | else | |
558 | sdata->drop_unencrypted = 0; | |
559 | ||
57c4d7b4 | 560 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
fbd2c8dc | 561 | ifibss->channel, ifibss->basic_rates, |
b59066a2 | 562 | capability, 0); |
46900298 JB |
563 | } |
564 | ||
ce9058ae BP |
565 | /* |
566 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH | |
567 | */ | |
568 | ||
af8cdcd8 | 569 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
46900298 JB |
570 | { |
571 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
572 | struct ieee80211_local *local = sdata->local; | |
0c1ad2ca | 573 | struct cfg80211_bss *cbss; |
af8cdcd8 | 574 | struct ieee80211_channel *chan = NULL; |
46900298 JB |
575 | const u8 *bssid = NULL; |
576 | int active_ibss; | |
e0d61887 | 577 | u16 capability; |
46900298 | 578 | |
7a17a33c JB |
579 | lockdep_assert_held(&ifibss->mtx); |
580 | ||
46900298 JB |
581 | active_ibss = ieee80211_sta_active_ibss(sdata); |
582 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
583 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
47846c9b | 584 | sdata->name, active_ibss); |
46900298 JB |
585 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
586 | ||
587 | if (active_ibss) | |
af8cdcd8 | 588 | return; |
46900298 | 589 | |
e0d61887 | 590 | capability = WLAN_CAPABILITY_IBSS; |
fffd0934 | 591 | if (ifibss->privacy) |
e0d61887 | 592 | capability |= WLAN_CAPABILITY_PRIVACY; |
af8cdcd8 JB |
593 | if (ifibss->fixed_bssid) |
594 | bssid = ifibss->bssid; | |
595 | if (ifibss->fixed_channel) | |
596 | chan = ifibss->channel; | |
597 | if (!is_zero_ether_addr(ifibss->bssid)) | |
46900298 | 598 | bssid = ifibss->bssid; |
0c1ad2ca JB |
599 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
600 | ifibss->ssid, ifibss->ssid_len, | |
601 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, | |
602 | capability); | |
603 | ||
604 | if (cbss) { | |
605 | struct ieee80211_bss *bss; | |
46900298 | 606 | |
0c1ad2ca | 607 | bss = (void *)cbss->priv; |
46900298 | 608 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
46900298 | 609 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
0c1ad2ca | 610 | "%pM\n", cbss->bssid, ifibss->bssid); |
46900298 JB |
611 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
612 | ||
46900298 JB |
613 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
614 | " based on configured SSID\n", | |
0c1ad2ca | 615 | sdata->name, cbss->bssid); |
46900298 | 616 | |
af8cdcd8 | 617 | ieee80211_sta_join_ibss(sdata, bss); |
46900298 | 618 | ieee80211_rx_bss_put(local, bss); |
af8cdcd8 | 619 | return; |
d419b9f0 | 620 | } |
46900298 JB |
621 | |
622 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
623 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
624 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
625 | ||
626 | /* Selected IBSS not found in current scan results - try to scan */ | |
ce9058ae | 627 | if (time_after(jiffies, ifibss->last_scan_completed + |
46900298 JB |
628 | IEEE80211_SCAN_INTERVAL)) { |
629 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
47846c9b | 630 | "join\n", sdata->name); |
46900298 | 631 | |
be4a4b6a JB |
632 | ieee80211_request_internal_scan(sdata, |
633 | ifibss->ssid, ifibss->ssid_len, | |
634 | ifibss->fixed_channel ? ifibss->channel : NULL); | |
ce9058ae | 635 | } else { |
46900298 JB |
636 | int interval = IEEE80211_SCAN_INTERVAL; |
637 | ||
638 | if (time_after(jiffies, ifibss->ibss_join_req + | |
639 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
af8cdcd8 JB |
640 | if (!(local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) { |
641 | ieee80211_sta_create_ibss(sdata); | |
642 | return; | |
643 | } | |
46900298 | 644 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
47846c9b | 645 | " %d MHz\n", sdata->name, |
46900298 JB |
646 | local->hw.conf.channel->center_freq); |
647 | ||
648 | /* No IBSS found - decrease scan interval and continue | |
649 | * scanning. */ | |
650 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
651 | } | |
652 | ||
af8cdcd8 JB |
653 | mod_timer(&ifibss->timer, |
654 | round_jiffies(jiffies + interval)); | |
46900298 | 655 | } |
46900298 JB |
656 | } |
657 | ||
658 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, | |
c269a203 | 659 | struct sk_buff *req) |
46900298 | 660 | { |
c269a203 | 661 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
46900298 JB |
662 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
663 | struct ieee80211_local *local = sdata->local; | |
c269a203 | 664 | int tx_last_beacon, len = req->len; |
46900298 JB |
665 | struct sk_buff *skb; |
666 | struct ieee80211_mgmt *resp; | |
40b275b6 | 667 | struct sk_buff *presp; |
46900298 JB |
668 | u8 *pos, *end; |
669 | ||
7a17a33c JB |
670 | lockdep_assert_held(&ifibss->mtx); |
671 | ||
40b275b6 JB |
672 | presp = rcu_dereference_protected(ifibss->presp, |
673 | lockdep_is_held(&ifibss->mtx)); | |
674 | ||
46900298 | 675 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
40b275b6 | 676 | len < 24 + 2 || !presp) |
46900298 JB |
677 | return; |
678 | ||
24487981 | 679 | tx_last_beacon = drv_tx_last_beacon(local); |
46900298 JB |
680 | |
681 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
682 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" | |
683 | " (tx_last_beacon=%d)\n", | |
47846c9b | 684 | sdata->name, mgmt->sa, mgmt->da, |
46900298 JB |
685 | mgmt->bssid, tx_last_beacon); |
686 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
687 | ||
1ed76487 | 688 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
46900298 JB |
689 | return; |
690 | ||
691 | if (memcmp(mgmt->bssid, ifibss->bssid, ETH_ALEN) != 0 && | |
692 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
693 | return; | |
694 | ||
695 | end = ((u8 *) mgmt) + len; | |
696 | pos = mgmt->u.probe_req.variable; | |
697 | if (pos[0] != WLAN_EID_SSID || | |
698 | pos + 2 + pos[1] > end) { | |
699 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
700 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
701 | "from %pM\n", | |
47846c9b | 702 | sdata->name, mgmt->sa); |
46900298 JB |
703 | #endif |
704 | return; | |
705 | } | |
706 | if (pos[1] != 0 && | |
707 | (pos[1] != ifibss->ssid_len || | |
0da780c2 | 708 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
46900298 JB |
709 | /* Ignore ProbeReq for foreign SSID */ |
710 | return; | |
711 | } | |
712 | ||
713 | /* Reply with ProbeResp */ | |
40b275b6 | 714 | skb = skb_copy(presp, GFP_KERNEL); |
46900298 JB |
715 | if (!skb) |
716 | return; | |
717 | ||
718 | resp = (struct ieee80211_mgmt *) skb->data; | |
719 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
720 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
721 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", | |
47846c9b | 722 | sdata->name, resp->da); |
46900298 | 723 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
62ae67be JB |
724 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
725 | ieee80211_tx_skb(sdata, skb); | |
46900298 JB |
726 | } |
727 | ||
728 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, | |
729 | struct ieee80211_mgmt *mgmt, | |
730 | size_t len, | |
731 | struct ieee80211_rx_status *rx_status) | |
732 | { | |
733 | size_t baselen; | |
734 | struct ieee802_11_elems elems; | |
735 | ||
47846c9b | 736 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
46900298 JB |
737 | return; /* ignore ProbeResp to foreign address */ |
738 | ||
739 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
740 | if (baselen > len) | |
741 | return; | |
742 | ||
743 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
744 | &elems); | |
745 | ||
746 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); | |
747 | } | |
748 | ||
749 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, | |
750 | struct ieee80211_mgmt *mgmt, | |
751 | size_t len, | |
752 | struct ieee80211_rx_status *rx_status) | |
753 | { | |
754 | size_t baselen; | |
755 | struct ieee802_11_elems elems; | |
756 | ||
757 | /* Process beacon from the current BSS */ | |
758 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
759 | if (baselen > len) | |
760 | return; | |
761 | ||
762 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
763 | ||
764 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
765 | } | |
766 | ||
1fa57d01 JB |
767 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
768 | struct sk_buff *skb) | |
46900298 JB |
769 | { |
770 | struct ieee80211_rx_status *rx_status; | |
771 | struct ieee80211_mgmt *mgmt; | |
772 | u16 fc; | |
773 | ||
f1d58c25 | 774 | rx_status = IEEE80211_SKB_RXCB(skb); |
46900298 JB |
775 | mgmt = (struct ieee80211_mgmt *) skb->data; |
776 | fc = le16_to_cpu(mgmt->frame_control); | |
777 | ||
7a17a33c JB |
778 | mutex_lock(&sdata->u.ibss.mtx); |
779 | ||
c926d006 TH |
780 | if (!sdata->u.ibss.ssid_len) |
781 | goto mgmt_out; /* not ready to merge yet */ | |
782 | ||
46900298 JB |
783 | switch (fc & IEEE80211_FCTL_STYPE) { |
784 | case IEEE80211_STYPE_PROBE_REQ: | |
c269a203 | 785 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
46900298 JB |
786 | break; |
787 | case IEEE80211_STYPE_PROBE_RESP: | |
788 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
789 | rx_status); | |
790 | break; | |
791 | case IEEE80211_STYPE_BEACON: | |
792 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
793 | rx_status); | |
794 | break; | |
795 | case IEEE80211_STYPE_AUTH: | |
796 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); | |
797 | break; | |
798 | } | |
7a17a33c | 799 | |
c926d006 | 800 | mgmt_out: |
7a17a33c | 801 | mutex_unlock(&sdata->u.ibss.mtx); |
46900298 JB |
802 | } |
803 | ||
1fa57d01 | 804 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
46900298 | 805 | { |
1fa57d01 | 806 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
46900298 | 807 | |
7a17a33c JB |
808 | mutex_lock(&ifibss->mtx); |
809 | ||
810 | /* | |
811 | * Work could be scheduled after scan or similar | |
812 | * when we aren't even joined (or trying) with a | |
813 | * network. | |
814 | */ | |
815 | if (!ifibss->ssid_len) | |
816 | goto out; | |
46900298 JB |
817 | |
818 | switch (ifibss->state) { | |
819 | case IEEE80211_IBSS_MLME_SEARCH: | |
820 | ieee80211_sta_find_ibss(sdata); | |
821 | break; | |
822 | case IEEE80211_IBSS_MLME_JOINED: | |
823 | ieee80211_sta_merge_ibss(sdata); | |
824 | break; | |
825 | default: | |
826 | WARN_ON(1); | |
827 | break; | |
828 | } | |
46900298 | 829 | |
7a17a33c JB |
830 | out: |
831 | mutex_unlock(&ifibss->mtx); | |
3a4d4aa2 JB |
832 | } |
833 | ||
46900298 JB |
834 | static void ieee80211_ibss_timer(unsigned long data) |
835 | { | |
836 | struct ieee80211_sub_if_data *sdata = | |
837 | (struct ieee80211_sub_if_data *) data; | |
838 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
839 | struct ieee80211_local *local = sdata->local; | |
840 | ||
5bb644a0 JB |
841 | if (local->quiescing) { |
842 | ifibss->timer_running = true; | |
843 | return; | |
844 | } | |
845 | ||
7a17a33c | 846 | ieee80211_queue_work(&local->hw, &sdata->work); |
46900298 JB |
847 | } |
848 | ||
5bb644a0 JB |
849 | #ifdef CONFIG_PM |
850 | void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) | |
851 | { | |
852 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
853 | ||
5bb644a0 JB |
854 | if (del_timer_sync(&ifibss->timer)) |
855 | ifibss->timer_running = true; | |
856 | } | |
857 | ||
858 | void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) | |
859 | { | |
860 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
861 | ||
862 | if (ifibss->timer_running) { | |
863 | add_timer(&ifibss->timer); | |
864 | ifibss->timer_running = false; | |
865 | } | |
866 | } | |
867 | #endif | |
868 | ||
46900298 JB |
869 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
870 | { | |
871 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
872 | ||
46900298 JB |
873 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
874 | (unsigned long) sdata); | |
7a17a33c | 875 | mutex_init(&ifibss->mtx); |
46900298 JB |
876 | } |
877 | ||
878 | /* scan finished notification */ | |
879 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) | |
880 | { | |
af8cdcd8 | 881 | struct ieee80211_sub_if_data *sdata; |
46900298 | 882 | |
29b4a4f7 JB |
883 | mutex_lock(&local->iflist_mtx); |
884 | list_for_each_entry(sdata, &local->interfaces, list) { | |
9607e6b6 | 885 | if (!ieee80211_sdata_running(sdata)) |
0e41f715 | 886 | continue; |
af8cdcd8 JB |
887 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
888 | continue; | |
889 | sdata->u.ibss.last_scan_completed = jiffies; | |
7a17a33c | 890 | ieee80211_queue_work(&local->hw, &sdata->work); |
46900298 | 891 | } |
29b4a4f7 | 892 | mutex_unlock(&local->iflist_mtx); |
46900298 JB |
893 | } |
894 | ||
af8cdcd8 JB |
895 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
896 | struct cfg80211_ibss_params *params) | |
897 | { | |
898 | struct sk_buff *skb; | |
ff3cc5f4 | 899 | u32 changed = 0; |
af8cdcd8 | 900 | |
7a17a33c JB |
901 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + |
902 | 36 /* bitrates */ + | |
903 | 34 /* SSID */ + | |
904 | 3 /* DS params */ + | |
905 | 4 /* IBSS params */ + | |
906 | params->ie_len); | |
907 | if (!skb) | |
908 | return -ENOMEM; | |
909 | ||
910 | mutex_lock(&sdata->u.ibss.mtx); | |
911 | ||
af8cdcd8 JB |
912 | if (params->bssid) { |
913 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); | |
914 | sdata->u.ibss.fixed_bssid = true; | |
915 | } else | |
916 | sdata->u.ibss.fixed_bssid = false; | |
917 | ||
fffd0934 | 918 | sdata->u.ibss.privacy = params->privacy; |
fbd2c8dc | 919 | sdata->u.ibss.basic_rates = params->basic_rates; |
dd5b4cc7 FF |
920 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
921 | sizeof(params->mcast_rate)); | |
fffd0934 | 922 | |
57c4d7b4 JB |
923 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
924 | ||
af8cdcd8 JB |
925 | sdata->u.ibss.channel = params->channel; |
926 | sdata->u.ibss.fixed_channel = params->channel_fixed; | |
927 | ||
adfba3c7 JB |
928 | /* fix ourselves to that channel now already */ |
929 | if (params->channel_fixed) { | |
930 | sdata->local->oper_channel = params->channel; | |
0aaffa9b JB |
931 | WARN_ON(!ieee80211_set_channel_type(sdata->local, sdata, |
932 | NL80211_CHAN_NO_HT)); | |
adfba3c7 JB |
933 | } |
934 | ||
af8cdcd8 JB |
935 | if (params->ie) { |
936 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, | |
937 | GFP_KERNEL); | |
938 | if (sdata->u.ibss.ie) | |
939 | sdata->u.ibss.ie_len = params->ie_len; | |
940 | } | |
941 | ||
af8cdcd8 JB |
942 | sdata->u.ibss.skb = skb; |
943 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; | |
944 | sdata->u.ibss.ibss_join_req = jiffies; | |
945 | ||
0e41f715 | 946 | memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); |
0e41f715 JB |
947 | sdata->u.ibss.ssid_len = params->ssid_len; |
948 | ||
7da7cc1d JB |
949 | mutex_unlock(&sdata->u.ibss.mtx); |
950 | ||
951 | mutex_lock(&sdata->local->mtx); | |
5cff20e6 | 952 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 953 | mutex_unlock(&sdata->local->mtx); |
5cff20e6 | 954 | |
ff3cc5f4 SW |
955 | /* |
956 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is | |
957 | * reserved, but an HT STA shall protect HT transmissions as though | |
958 | * the HT Protection field were set to non-HT mixed mode. | |
959 | * | |
960 | * In an IBSS, the RIFS Mode field of the HT Operation element is | |
961 | * also reserved, but an HT STA shall operate as though this field | |
962 | * were set to 1. | |
963 | */ | |
964 | ||
965 | sdata->vif.bss_conf.ht_operation_mode |= | |
966 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
967 | | IEEE80211_HT_PARAM_RIFS_MODE; | |
968 | ||
969 | changed |= BSS_CHANGED_HT; | |
970 | ieee80211_bss_info_change_notify(sdata, changed); | |
971 | ||
64592c8f | 972 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
af8cdcd8 JB |
973 | |
974 | return 0; | |
975 | } | |
976 | ||
977 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) | |
978 | { | |
979 | struct sk_buff *skb; | |
5ea096c0 TP |
980 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
981 | struct ieee80211_local *local = sdata->local; | |
982 | struct cfg80211_bss *cbss; | |
983 | u16 capability; | |
7a17a33c JB |
984 | int active_ibss; |
985 | ||
986 | mutex_lock(&sdata->u.ibss.mtx); | |
5ea096c0 | 987 | |
f3209bea JB |
988 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
989 | memset(sdata->u.ibss.bssid, 0, ETH_ALEN); | |
990 | sdata->u.ibss.ssid_len = 0; | |
991 | ||
5ea096c0 TP |
992 | active_ibss = ieee80211_sta_active_ibss(sdata); |
993 | ||
994 | if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { | |
995 | capability = WLAN_CAPABILITY_IBSS; | |
996 | ||
997 | if (ifibss->privacy) | |
998 | capability |= WLAN_CAPABILITY_PRIVACY; | |
999 | ||
1000 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel, | |
1001 | ifibss->bssid, ifibss->ssid, | |
1002 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | | |
1003 | WLAN_CAPABILITY_PRIVACY, | |
1004 | capability); | |
1005 | ||
1006 | if (cbss) { | |
1007 | cfg80211_unlink_bss(local->hw.wiphy, cbss); | |
1008 | cfg80211_put_bss(cbss); | |
1009 | } | |
1010 | } | |
af8cdcd8 | 1011 | |
af8cdcd8 | 1012 | sta_info_flush(sdata->local, sdata); |
86a2ea41 | 1013 | netif_carrier_off(sdata->dev); |
af8cdcd8 JB |
1014 | |
1015 | /* remove beacon */ | |
1016 | kfree(sdata->u.ibss.ie); | |
40b275b6 JB |
1017 | skb = rcu_dereference_protected(sdata->u.ibss.presp, |
1018 | lockdep_is_held(&sdata->u.ibss.mtx)); | |
a9b3cd7f | 1019 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
8fc214ba JB |
1020 | sdata->vif.bss_conf.ibss_joined = false; |
1021 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | | |
1022 | BSS_CHANGED_IBSS); | |
af8cdcd8 JB |
1023 | synchronize_rcu(); |
1024 | kfree_skb(skb); | |
1025 | ||
35f20c14 | 1026 | skb_queue_purge(&sdata->skb_queue); |
5cff20e6 | 1027 | |
bc05d19f | 1028 | del_timer_sync(&sdata->u.ibss.timer); |
7a17a33c JB |
1029 | |
1030 | mutex_unlock(&sdata->u.ibss.mtx); | |
bc05d19f | 1031 | |
7da7cc1d | 1032 | mutex_lock(&local->mtx); |
5cff20e6 | 1033 | ieee80211_recalc_idle(sdata->local); |
7da7cc1d | 1034 | mutex_unlock(&local->mtx); |
af8cdcd8 JB |
1035 | |
1036 | return 0; | |
1037 | } |