Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
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 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
2c8dccc7 JB |
26 | #include "rate.h" |
27 | #include "led.h" | |
f0706e82 | 28 | |
6042a3e3 | 29 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
30 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
31 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
32 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
33 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
34 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
15b7b062 | 35 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 36 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 37 | |
5484e237 JB |
38 | /* utils */ |
39 | static int ecw2cw(int ecw) | |
60f8b39c | 40 | { |
5484e237 | 41 | return (1 << ecw) - 1; |
60f8b39c JB |
42 | } |
43 | ||
c2b13452 | 44 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
45 | { |
46 | u8 *end, *pos; | |
47 | ||
00d3f14c | 48 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
49 | if (pos == NULL) |
50 | return NULL; | |
00d3f14c | 51 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
52 | |
53 | while (pos + 1 < end) { | |
54 | if (pos + 2 + pos[1] > end) | |
55 | break; | |
56 | if (pos[0] == ie) | |
57 | return pos; | |
58 | pos += 2 + pos[1]; | |
59 | } | |
60 | ||
61 | return NULL; | |
62 | } | |
63 | ||
c2b13452 | 64 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 65 | struct ieee80211_supported_band *sband, |
881d948c | 66 | u32 *rates) |
9ac19a90 JB |
67 | { |
68 | int i, j, count; | |
69 | *rates = 0; | |
70 | count = 0; | |
71 | for (i = 0; i < bss->supp_rates_len; i++) { | |
72 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
73 | ||
74 | for (j = 0; j < sband->n_bitrates; j++) | |
75 | if (sband->bitrates[j].bitrate == rate) { | |
76 | *rates |= BIT(j); | |
77 | count++; | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | return count; | |
83 | } | |
84 | ||
d5522e03 JB |
85 | /* |
86 | * ieee80211_enable_ht should be called only after the operating band | |
87 | * has been determined as ht configuration depends on the hw's | |
88 | * HT abilities for a specific band. | |
89 | */ | |
90 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
91 | struct ieee80211_ht_info *hti, | |
92 | u16 ap_ht_cap_flags) | |
93 | { | |
94 | struct ieee80211_local *local = sdata->local; | |
95 | struct ieee80211_supported_band *sband; | |
96 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
97 | struct ieee80211_bss_ht_conf ht; | |
98 | struct sta_info *sta; | |
99 | u32 changed = 0; | |
100 | bool enable_ht = true, ht_changed; | |
101 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
102 | ||
103 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
104 | ||
105 | memset(&ht, 0, sizeof(ht)); | |
106 | ||
107 | /* HT is not supported */ | |
108 | if (!sband->ht_cap.ht_supported) | |
109 | enable_ht = false; | |
110 | ||
111 | /* check that channel matches the right operating channel */ | |
112 | if (local->hw.conf.channel->center_freq != | |
113 | ieee80211_channel_to_frequency(hti->control_chan)) | |
114 | enable_ht = false; | |
115 | ||
116 | if (enable_ht) { | |
117 | channel_type = NL80211_CHAN_HT20; | |
118 | ||
119 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
120 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
121 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
122 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
123 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
124 | channel_type = NL80211_CHAN_HT40PLUS; | |
125 | break; | |
126 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
127 | channel_type = NL80211_CHAN_HT40MINUS; | |
128 | break; | |
129 | } | |
130 | } | |
131 | } | |
132 | ||
133 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
134 | channel_type != local->hw.conf.channel_type; | |
135 | ||
136 | local->oper_channel_type = channel_type; | |
137 | ||
138 | if (ht_changed) { | |
139 | /* channel_type change automatically detected */ | |
140 | ieee80211_hw_config(local, 0); | |
141 | ||
142 | rcu_read_lock(); | |
143 | ||
144 | sta = sta_info_get(local, ifmgd->bssid); | |
145 | if (sta) | |
146 | rate_control_rate_update(local, sband, sta, | |
147 | IEEE80211_RC_HT_CHANGED); | |
148 | ||
149 | rcu_read_unlock(); | |
150 | ||
151 | } | |
152 | ||
153 | /* disable HT */ | |
154 | if (!enable_ht) | |
155 | return 0; | |
156 | ||
157 | ht.operation_mode = le16_to_cpu(hti->operation_mode); | |
158 | ||
159 | /* if bss configuration changed store the new one */ | |
160 | if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { | |
161 | changed |= BSS_CHANGED_HT; | |
162 | sdata->vif.bss_conf.ht = ht; | |
163 | } | |
164 | ||
165 | return changed; | |
166 | } | |
167 | ||
9c6bd790 JB |
168 | /* frame sending functions */ |
169 | ||
46900298 | 170 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 171 | { |
46900298 | 172 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
173 | struct ieee80211_local *local = sdata->local; |
174 | struct sk_buff *skb; | |
175 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 176 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
177 | int i, len, count, rates_len, supp_rates_len; |
178 | u16 capab; | |
c2b13452 | 179 | struct ieee80211_bss *bss; |
9ac19a90 JB |
180 | int wmm = 0; |
181 | struct ieee80211_supported_band *sband; | |
881d948c | 182 | u32 rates = 0; |
9ac19a90 JB |
183 | |
184 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 185 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 186 | ifmgd->ssid_len); |
9ac19a90 JB |
187 | if (!skb) { |
188 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
189 | "frame\n", sdata->dev->name); | |
190 | return; | |
191 | } | |
192 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
193 | ||
194 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
195 | ||
46900298 | 196 | capab = ifmgd->capab; |
9ac19a90 JB |
197 | |
198 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
199 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
200 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
201 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
202 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
203 | } | |
204 | ||
46900298 | 205 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 206 | local->hw.conf.channel->center_freq, |
46900298 | 207 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 208 | if (bss) { |
00d3f14c | 209 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
210 | capab |= WLAN_CAPABILITY_PRIVACY; |
211 | if (bss->wmm_used) | |
212 | wmm = 1; | |
213 | ||
214 | /* get all rates supported by the device and the AP as | |
215 | * some APs don't like getting a superset of their rates | |
216 | * in the association request (e.g. D-Link DAP 1353 in | |
217 | * b-only mode) */ | |
218 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
219 | ||
00d3f14c | 220 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
221 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
222 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
223 | ||
224 | ieee80211_rx_bss_put(local, bss); | |
225 | } else { | |
226 | rates = ~0; | |
227 | rates_len = sband->n_bitrates; | |
228 | } | |
229 | ||
230 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
231 | memset(mgmt, 0, 24); | |
46900298 | 232 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 233 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 234 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 235 | |
46900298 | 236 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
237 | skb_put(skb, 10); |
238 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
239 | IEEE80211_STYPE_REASSOC_REQ); | |
240 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
241 | mgmt->u.reassoc_req.listen_interval = | |
242 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 243 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
244 | ETH_ALEN); |
245 | } else { | |
246 | skb_put(skb, 4); | |
247 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
248 | IEEE80211_STYPE_ASSOC_REQ); | |
249 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 250 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
251 | cpu_to_le16(local->hw.conf.listen_interval); |
252 | } | |
253 | ||
254 | /* SSID */ | |
46900298 | 255 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 256 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
257 | *pos++ = ifmgd->ssid_len; |
258 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
259 | |
260 | /* add all rates which were marked to be used above */ | |
261 | supp_rates_len = rates_len; | |
262 | if (supp_rates_len > 8) | |
263 | supp_rates_len = 8; | |
264 | ||
265 | len = sband->n_bitrates; | |
266 | pos = skb_put(skb, supp_rates_len + 2); | |
267 | *pos++ = WLAN_EID_SUPP_RATES; | |
268 | *pos++ = supp_rates_len; | |
269 | ||
270 | count = 0; | |
271 | for (i = 0; i < sband->n_bitrates; i++) { | |
272 | if (BIT(i) & rates) { | |
273 | int rate = sband->bitrates[i].bitrate; | |
274 | *pos++ = (u8) (rate / 5); | |
275 | if (++count == 8) | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
280 | if (rates_len > count) { | |
281 | pos = skb_put(skb, rates_len - count + 2); | |
282 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
283 | *pos++ = rates_len - count; | |
284 | ||
285 | for (i++; i < sband->n_bitrates; i++) { | |
286 | if (BIT(i) & rates) { | |
287 | int rate = sband->bitrates[i].bitrate; | |
288 | *pos++ = (u8) (rate / 5); | |
289 | } | |
290 | } | |
291 | } | |
292 | ||
293 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
294 | /* 1. power capabilities */ | |
295 | pos = skb_put(skb, 4); | |
296 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
297 | *pos++ = 2; | |
298 | *pos++ = 0; /* min tx power */ | |
299 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
300 | ||
301 | /* 2. supported channels */ | |
302 | /* TODO: get this in reg domain format */ | |
303 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
304 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
305 | *pos++ = 2 * sband->n_channels; | |
306 | for (i = 0; i < sband->n_channels; i++) { | |
307 | *pos++ = ieee80211_frequency_to_channel( | |
308 | sband->channels[i].center_freq); | |
309 | *pos++ = 1; /* one channel in the subband*/ | |
310 | } | |
311 | } | |
312 | ||
46900298 JB |
313 | if (ifmgd->extra_ie) { |
314 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
315 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
316 | } |
317 | ||
46900298 | 318 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
319 | pos = skb_put(skb, 9); |
320 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
321 | *pos++ = 7; /* len */ | |
322 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
323 | *pos++ = 0x50; | |
324 | *pos++ = 0xf2; | |
325 | *pos++ = 2; /* WME */ | |
326 | *pos++ = 0; /* WME info */ | |
327 | *pos++ = 1; /* WME ver */ | |
328 | *pos++ = 0; | |
329 | } | |
330 | ||
331 | /* wmm support is a must to HT */ | |
eb46936b VT |
332 | /* |
333 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
334 | * ciphers in HT mode. We still associate in non-ht | |
335 | * mode (11a/b/g) if any one of these ciphers is | |
336 | * configured as pairwise. | |
337 | */ | |
46900298 | 338 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
339 | sband->ht_cap.ht_supported && |
340 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 341 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 342 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
343 | struct ieee80211_ht_info *ht_info = |
344 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
345 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
346 | __le16 tmp; |
347 | u32 flags = local->hw.conf.channel->flags; | |
348 | ||
d9fe60de JB |
349 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
350 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 351 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 352 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
353 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
354 | } | |
355 | break; | |
d9fe60de | 356 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 357 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 358 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
359 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
360 | } | |
361 | break; | |
362 | } | |
363 | ||
364 | tmp = cpu_to_le16(cap); | |
365 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
366 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
367 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
368 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
369 | memcpy(pos, &tmp, sizeof(u16)); | |
370 | pos += sizeof(u16); | |
371 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
372 | *pos++ = sband->ht_cap.ampdu_factor | |
373 | (sband->ht_cap.ampdu_density << 2); | |
374 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
375 | } |
376 | ||
46900298 JB |
377 | kfree(ifmgd->assocreq_ies); |
378 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
379 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
380 | if (ifmgd->assocreq_ies) | |
381 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 382 | |
e50db65c | 383 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
384 | } |
385 | ||
386 | ||
ef422bc0 JB |
387 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
388 | u16 stype, u16 reason) | |
9ac19a90 JB |
389 | { |
390 | struct ieee80211_local *local = sdata->local; | |
46900298 | 391 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
392 | struct sk_buff *skb; |
393 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 394 | |
65fc73ac | 395 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 396 | if (!skb) { |
ef422bc0 JB |
397 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
398 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
399 | return; |
400 | } | |
401 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
402 | ||
403 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
404 | memset(mgmt, 0, 24); | |
46900298 | 405 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 406 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 407 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 408 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 409 | skb_put(skb, 2); |
ef422bc0 | 410 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
411 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
412 | ||
53b46b84 JM |
413 | if (stype == IEEE80211_STYPE_DEAUTH) |
414 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
415 | else | |
416 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 417 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
418 | } |
419 | ||
572e0012 KV |
420 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
421 | struct ieee80211_sub_if_data *sdata) | |
422 | { | |
46900298 | 423 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
424 | struct ieee80211_pspoll *pspoll; |
425 | struct sk_buff *skb; | |
426 | u16 fc; | |
427 | ||
428 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
429 | if (!skb) { | |
430 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
431 | "pspoll frame\n", sdata->dev->name); | |
432 | return; | |
433 | } | |
434 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
435 | ||
436 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
437 | memset(pspoll, 0, sizeof(*pspoll)); | |
438 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
439 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 440 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
441 | |
442 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
443 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
444 | ||
46900298 | 445 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
446 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
447 | ||
448 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
449 | } |
450 | ||
965bedad JB |
451 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
452 | struct ieee80211_sub_if_data *sdata, | |
453 | int powersave) | |
454 | { | |
455 | struct sk_buff *skb; | |
456 | struct ieee80211_hdr *nullfunc; | |
457 | __le16 fc; | |
458 | ||
459 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
460 | return; | |
461 | ||
462 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
463 | if (!skb) { | |
464 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
465 | "frame\n", sdata->dev->name); | |
466 | return; | |
467 | } | |
468 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
469 | ||
470 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
471 | memset(nullfunc, 0, 24); | |
472 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
473 | IEEE80211_FCTL_TODS); | |
474 | if (powersave) | |
475 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
476 | nullfunc->frame_control = fc; | |
477 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
478 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
479 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
480 | ||
481 | ieee80211_tx_skb(sdata, skb, 0); | |
482 | } | |
483 | ||
484 | /* powersave */ | |
485 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
486 | struct ieee80211_sub_if_data *sdata) | |
487 | { | |
488 | struct ieee80211_conf *conf = &local->hw.conf; | |
489 | ||
490 | if (conf->dynamic_ps_timeout > 0 && | |
491 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
492 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
493 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
494 | } else { | |
495 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
496 | ieee80211_send_nullfunc(local, sdata, 1); | |
497 | conf->flags |= IEEE80211_CONF_PS; | |
498 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
499 | } | |
500 | } | |
501 | ||
502 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
503 | { | |
504 | struct ieee80211_conf *conf = &local->hw.conf; | |
505 | ||
506 | if (local->ps_sdata) { | |
507 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
508 | return; | |
509 | ||
510 | ieee80211_enable_ps(local, local->ps_sdata); | |
511 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
512 | conf->flags &= ~IEEE80211_CONF_PS; | |
513 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
514 | del_timer_sync(&local->dynamic_ps_timer); | |
515 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
516 | } | |
517 | } | |
518 | ||
519 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 520 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
521 | { |
522 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
523 | int count = 0; | |
524 | ||
525 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
526 | local->ps_sdata = NULL; | |
527 | return; | |
528 | } | |
529 | ||
530 | list_for_each_entry(sdata, &local->interfaces, list) { | |
531 | if (!netif_running(sdata->dev)) | |
532 | continue; | |
533 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
534 | continue; | |
535 | found = sdata; | |
536 | count++; | |
537 | } | |
538 | ||
10f644a4 JB |
539 | if (count == 1 && found->u.mgd.powersave) { |
540 | s32 beaconint_us; | |
541 | ||
542 | if (latency < 0) | |
543 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
544 | ||
545 | beaconint_us = ieee80211_tu_to_usec( | |
546 | found->vif.bss_conf.beacon_int); | |
547 | ||
548 | if (beaconint_us > latency) | |
549 | local->ps_sdata = NULL; | |
550 | else | |
551 | local->ps_sdata = found; | |
552 | } else { | |
965bedad | 553 | local->ps_sdata = NULL; |
10f644a4 | 554 | } |
965bedad JB |
555 | |
556 | ieee80211_change_ps(local); | |
557 | } | |
558 | ||
559 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
560 | { | |
561 | struct ieee80211_local *local = | |
562 | container_of(work, struct ieee80211_local, | |
563 | dynamic_ps_disable_work); | |
564 | ||
565 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
566 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
567 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
568 | } | |
569 | ||
570 | ieee80211_wake_queues_by_reason(&local->hw, | |
571 | IEEE80211_QUEUE_STOP_REASON_PS); | |
572 | } | |
573 | ||
574 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
575 | { | |
576 | struct ieee80211_local *local = | |
577 | container_of(work, struct ieee80211_local, | |
578 | dynamic_ps_enable_work); | |
579 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
580 | ||
581 | /* can only happen when PS was just disabled anyway */ | |
582 | if (!sdata) | |
583 | return; | |
584 | ||
585 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
586 | return; | |
587 | ||
588 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
589 | ieee80211_send_nullfunc(local, sdata, 1); | |
590 | ||
591 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
592 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
593 | } | |
594 | ||
595 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
596 | { | |
597 | struct ieee80211_local *local = (void *) data; | |
598 | ||
599 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
600 | } | |
601 | ||
60f8b39c | 602 | /* MLME */ |
f698d856 | 603 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 604 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
605 | u8 *wmm_param, size_t wmm_param_len) |
606 | { | |
f0706e82 JB |
607 | struct ieee80211_tx_queue_params params; |
608 | size_t left; | |
609 | int count; | |
610 | u8 *pos; | |
611 | ||
46900298 | 612 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
613 | return; |
614 | ||
615 | if (!wmm_param) | |
616 | return; | |
617 | ||
f0706e82 JB |
618 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
619 | return; | |
620 | count = wmm_param[6] & 0x0f; | |
46900298 | 621 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 622 | return; |
46900298 | 623 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
624 | |
625 | pos = wmm_param + 8; | |
626 | left = wmm_param_len - 8; | |
627 | ||
628 | memset(¶ms, 0, sizeof(params)); | |
629 | ||
f0706e82 JB |
630 | local->wmm_acm = 0; |
631 | for (; left >= 4; left -= 4, pos += 4) { | |
632 | int aci = (pos[0] >> 5) & 0x03; | |
633 | int acm = (pos[0] >> 4) & 0x01; | |
634 | int queue; | |
635 | ||
636 | switch (aci) { | |
0eeb59fe | 637 | case 1: /* AC_BK */ |
e100bb64 | 638 | queue = 3; |
988c0f72 | 639 | if (acm) |
0eeb59fe | 640 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 641 | break; |
0eeb59fe | 642 | case 2: /* AC_VI */ |
e100bb64 | 643 | queue = 1; |
988c0f72 | 644 | if (acm) |
0eeb59fe | 645 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 646 | break; |
0eeb59fe | 647 | case 3: /* AC_VO */ |
e100bb64 | 648 | queue = 0; |
988c0f72 | 649 | if (acm) |
0eeb59fe | 650 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 651 | break; |
0eeb59fe | 652 | case 0: /* AC_BE */ |
f0706e82 | 653 | default: |
e100bb64 | 654 | queue = 2; |
988c0f72 | 655 | if (acm) |
0eeb59fe | 656 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
657 | break; |
658 | } | |
659 | ||
660 | params.aifs = pos[0] & 0x0f; | |
661 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
662 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 663 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 664 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 665 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 666 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 667 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
668 | params.cw_max, params.txop); |
669 | #endif | |
0eeb59fe JM |
670 | if (local->ops->conf_tx && |
671 | local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
f0706e82 | 672 | printk(KERN_DEBUG "%s: failed to set TX queue " |
f698d856 | 673 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
674 | } |
675 | } | |
676 | } | |
677 | ||
1fb3606b | 678 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) |
a97b77b9 VN |
679 | { |
680 | u8 mask; | |
681 | u8 index, indexn1, indexn2; | |
682 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
683 | ||
60375541 JB |
684 | if (unlikely(!tim || elems->tim_len < 4)) |
685 | return false; | |
686 | ||
a97b77b9 VN |
687 | aid &= 0x3fff; |
688 | index = aid / 8; | |
689 | mask = 1 << (aid & 7); | |
690 | ||
a97b77b9 VN |
691 | indexn1 = tim->bitmap_ctrl & 0xfe; |
692 | indexn2 = elems->tim_len + indexn1 - 4; | |
693 | ||
694 | if (index < indexn1 || index > indexn2) | |
695 | return false; | |
696 | ||
697 | index -= indexn1; | |
698 | ||
699 | return !!(tim->virtual_map[index] & mask); | |
700 | } | |
701 | ||
7a5158ef JB |
702 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
703 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 704 | { |
bda3933a | 705 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 706 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 707 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 708 | #endif |
471b3efd | 709 | u32 changed = 0; |
7a5158ef JB |
710 | bool use_protection; |
711 | bool use_short_preamble; | |
712 | bool use_short_slot; | |
713 | ||
714 | if (erp_valid) { | |
715 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
716 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
717 | } else { | |
718 | use_protection = false; | |
719 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
720 | } | |
721 | ||
722 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 723 | |
471b3efd | 724 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 725 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 726 | if (net_ratelimit()) { |
0c68ae26 | 727 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 728 | sdata->dev->name, |
5628221c | 729 | use_protection ? "enabled" : "disabled", |
46900298 | 730 | ifmgd->bssid); |
5628221c | 731 | } |
f4ea83dd | 732 | #endif |
471b3efd JB |
733 | bss_conf->use_cts_prot = use_protection; |
734 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 735 | } |
7e9ed188 | 736 | |
d43c7b37 | 737 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 738 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
739 | if (net_ratelimit()) { |
740 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 741 | " (BSSID=%pM)\n", |
471b3efd | 742 | sdata->dev->name, |
d43c7b37 | 743 | use_short_preamble ? "short" : "long", |
46900298 | 744 | ifmgd->bssid); |
7e9ed188 | 745 | } |
f4ea83dd | 746 | #endif |
d43c7b37 | 747 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 748 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 749 | } |
d9430a32 | 750 | |
7a5158ef JB |
751 | if (use_short_slot != bss_conf->use_short_slot) { |
752 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
753 | if (net_ratelimit()) { | |
391429c1 CL |
754 | printk(KERN_DEBUG "%s: switched to %s slot time" |
755 | " (BSSID=%pM)\n", | |
7a5158ef JB |
756 | sdata->dev->name, |
757 | use_short_slot ? "short" : "long", | |
46900298 | 758 | ifmgd->bssid); |
7a5158ef JB |
759 | } |
760 | #endif | |
761 | bss_conf->use_short_slot = use_short_slot; | |
762 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
763 | } |
764 | ||
765 | return changed; | |
766 | } | |
767 | ||
46900298 | 768 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
769 | { |
770 | union iwreq_data wrqu; | |
46900298 | 771 | |
f5e5bf25 | 772 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
773 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
774 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
775 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
776 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
777 | } | |
778 | ||
46900298 | 779 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 780 | { |
46900298 | 781 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
782 | char *buf; |
783 | size_t len; | |
784 | int i; | |
f0706e82 JB |
785 | union iwreq_data wrqu; |
786 | ||
46900298 | 787 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
788 | return; |
789 | ||
46900298 JB |
790 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
791 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
792 | if (!buf) |
793 | return; | |
794 | ||
795 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 796 | if (ifmgd->assocreq_ies) { |
74af0250 | 797 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 798 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 799 | len += sprintf(buf + len, "%02x", |
46900298 | 800 | ifmgd->assocreq_ies[i]); |
74af0250 | 801 | } |
f0706e82 | 802 | } |
46900298 JB |
803 | if (ifmgd->assocresp_ies) { |
804 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
805 | len += sprintf(buf + len, " "); |
806 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 807 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 808 | len += sprintf(buf + len, "%02x", |
46900298 | 809 | ifmgd->assocresp_ies[i]); |
74af0250 | 810 | } |
f0706e82 | 811 | } |
74af0250 LT |
812 | len += sprintf(buf + len, ")"); |
813 | ||
814 | if (len > IW_CUSTOM_MAX) { | |
815 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 816 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 817 | len += sprintf(buf + len, "%02x", |
46900298 | 818 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
819 | } |
820 | } | |
821 | ||
ad788b5e JL |
822 | if (len <= IW_CUSTOM_MAX) { |
823 | memset(&wrqu, 0, sizeof(wrqu)); | |
824 | wrqu.data.length = len; | |
825 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
826 | } | |
74af0250 LT |
827 | |
828 | kfree(buf); | |
f0706e82 JB |
829 | } |
830 | ||
831 | ||
f698d856 | 832 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 833 | u32 bss_info_changed) |
f0706e82 | 834 | { |
46900298 | 835 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 836 | struct ieee80211_local *local = sdata->local; |
38668c05 | 837 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 838 | |
c2b13452 | 839 | struct ieee80211_bss *bss; |
d6f2da5b | 840 | |
ae5eb026 | 841 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 842 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 843 | |
46900298 | 844 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 845 | conf->channel->center_freq, |
46900298 | 846 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
847 | if (bss) { |
848 | /* set timing information */ | |
00d3f14c JB |
849 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
850 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 851 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 852 | |
ae5eb026 | 853 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 854 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 855 | |
04de8381 KV |
856 | cfg80211_hold_bss(&bss->cbss); |
857 | ||
9ac19a90 | 858 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
859 | } |
860 | ||
46900298 JB |
861 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
862 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
863 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 864 | |
46900298 | 865 | ifmgd->last_probe = jiffies; |
9ac19a90 | 866 | ieee80211_led_assoc(local, 1); |
9306102e | 867 | |
bda3933a | 868 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
869 | /* |
870 | * For now just always ask the driver to update the basic rateset | |
871 | * when we have associated, we aren't checking whether it actually | |
872 | * changed or not. | |
873 | */ | |
ae5eb026 JB |
874 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
875 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 876 | |
965bedad JB |
877 | /* will be same as sdata */ |
878 | if (local->ps_sdata) | |
879 | ieee80211_enable_ps(local, sdata); | |
e0cb686f | 880 | |
9ac19a90 JB |
881 | netif_tx_start_all_queues(sdata->dev); |
882 | netif_carrier_on(sdata->dev); | |
f0706e82 | 883 | |
46900298 | 884 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
885 | } |
886 | ||
46900298 | 887 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 888 | { |
46900298 | 889 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 890 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
891 | |
892 | ifmgd->direct_probe_tries++; | |
893 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 894 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
895 | sdata->dev->name, ifmgd->bssid); |
896 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
897 | ieee80211_sta_send_apinfo(sdata); | |
7a947080 VT |
898 | |
899 | /* | |
900 | * Most likely AP is not in the range so remove the | |
901 | * bss information associated to the AP | |
902 | */ | |
46900298 | 903 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 904 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 905 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
906 | |
907 | /* | |
908 | * We might have a pending scan which had no chance to run yet | |
909 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
910 | * Hence, queue the STAs work again | |
911 | */ | |
912 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
913 | return; |
914 | } | |
f0706e82 | 915 | |
0c68ae26 | 916 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
917 | sdata->dev->name, ifmgd->bssid, |
918 | ifmgd->direct_probe_tries); | |
f0706e82 | 919 | |
46900298 | 920 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 921 | |
46900298 | 922 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); |
9ac19a90 JB |
923 | |
924 | /* Direct probe is sent to broadcast address as some APs | |
925 | * will not answer to direct packet in unassociated state. | |
926 | */ | |
927 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 928 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 929 | |
46900298 | 930 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 931 | } |
f0706e82 | 932 | |
9ac19a90 | 933 | |
46900298 | 934 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 935 | { |
46900298 | 936 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 937 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
938 | u8 *ies; |
939 | size_t ies_len; | |
46900298 JB |
940 | |
941 | ifmgd->auth_tries++; | |
942 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 943 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 944 | " timed out\n", |
46900298 JB |
945 | sdata->dev->name, ifmgd->bssid); |
946 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
947 | ieee80211_sta_send_apinfo(sdata); | |
948 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 949 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 950 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
951 | |
952 | /* | |
953 | * We might have a pending scan which had no chance to run yet | |
954 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
955 | * Hence, queue the STAs work again | |
956 | */ | |
957 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
958 | return; |
959 | } | |
f0706e82 | 960 | |
46900298 | 961 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 962 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 963 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 964 | |
636a5d36 JM |
965 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
966 | ies = ifmgd->sme_auth_ie; | |
967 | ies_len = ifmgd->sme_auth_ie_len; | |
968 | } else { | |
969 | ies = NULL; | |
970 | ies_len = 0; | |
971 | } | |
972 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
973 | ifmgd->bssid, 0); |
974 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 975 | |
46900298 | 976 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
977 | } |
978 | ||
5925d976 VN |
979 | /* |
980 | * The disassoc 'reason' argument can be either our own reason | |
981 | * if self disconnected or a reason code from the AP. | |
982 | */ | |
aa458d17 | 983 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
984 | bool deauth, bool self_disconnected, |
985 | u16 reason) | |
aa458d17 | 986 | { |
46900298 | 987 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 988 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
989 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
990 | struct ieee80211_bss *bss; | |
aa458d17 | 991 | struct sta_info *sta; |
e0cb686f | 992 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
993 | |
994 | rcu_read_lock(); | |
995 | ||
46900298 | 996 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
997 | if (!sta) { |
998 | rcu_read_unlock(); | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | if (deauth) { | |
46900298 JB |
1003 | ifmgd->direct_probe_tries = 0; |
1004 | ifmgd->auth_tries = 0; | |
aa458d17 | 1005 | } |
46900298 JB |
1006 | ifmgd->assoc_scan_tries = 0; |
1007 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1008 | |
24e64622 | 1009 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1010 | netif_carrier_off(sdata->dev); |
1011 | ||
2dace10e | 1012 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1013 | |
04de8381 KV |
1014 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1015 | conf->channel->center_freq, | |
1016 | ifmgd->ssid, ifmgd->ssid_len); | |
1017 | ||
1018 | if (bss) { | |
1019 | cfg80211_unhold_bss(&bss->cbss); | |
1020 | ieee80211_rx_bss_put(local, bss); | |
1021 | } | |
1022 | ||
aa458d17 TW |
1023 | if (self_disconnected) { |
1024 | if (deauth) | |
ef422bc0 JB |
1025 | ieee80211_send_deauth_disassoc(sdata, |
1026 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1027 | else |
ef422bc0 JB |
1028 | ieee80211_send_deauth_disassoc(sdata, |
1029 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1030 | } |
1031 | ||
46900298 | 1032 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1033 | changed |= ieee80211_reset_erp_info(sdata); |
1034 | ||
f5e5bf25 | 1035 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1036 | changed |= BSS_CHANGED_ASSOC; |
1037 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1038 | |
46900298 | 1039 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1040 | |
7a947080 | 1041 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1042 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1043 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1044 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1045 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1046 | } |
aa458d17 | 1047 | |
aa458d17 TW |
1048 | rcu_read_unlock(); |
1049 | ||
4797938c | 1050 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1051 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1052 | |
a8302de9 VT |
1053 | local->power_constr_level = 0; |
1054 | ||
520eb820 KV |
1055 | del_timer_sync(&local->dynamic_ps_timer); |
1056 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1057 | ||
e0cb686f KV |
1058 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1059 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1060 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1061 | } | |
ae5eb026 | 1062 | |
e0cb686f | 1063 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1064 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1065 | |
1066 | rcu_read_lock(); | |
1067 | ||
46900298 | 1068 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1069 | if (!sta) { |
1070 | rcu_read_unlock(); | |
1071 | return; | |
1072 | } | |
1073 | ||
1074 | sta_info_unlink(&sta); | |
1075 | ||
1076 | rcu_read_unlock(); | |
1077 | ||
1078 | sta_info_destroy(sta); | |
aa458d17 | 1079 | } |
f0706e82 | 1080 | |
9ac19a90 JB |
1081 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1082 | { | |
1083 | if (!sdata || !sdata->default_key || | |
1084 | sdata->default_key->conf.alg != ALG_WEP) | |
1085 | return 0; | |
1086 | return 1; | |
1087 | } | |
1088 | ||
46900298 | 1089 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1090 | { |
46900298 | 1091 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1092 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1093 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1094 | int bss_privacy; |
1095 | int wep_privacy; | |
1096 | int privacy_invoked; | |
f0706e82 | 1097 | |
7986cf95 | 1098 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1099 | return 0; |
1100 | ||
46900298 | 1101 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1102 | local->hw.conf.channel->center_freq, |
46900298 | 1103 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1104 | if (!bss) |
1105 | return 0; | |
1106 | ||
00d3f14c | 1107 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1108 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1109 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1110 | |
3e122be0 | 1111 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1112 | |
5b98b1f7 JB |
1113 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1114 | return 0; | |
1115 | ||
1116 | return 1; | |
f0706e82 JB |
1117 | } |
1118 | ||
46900298 | 1119 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1120 | { |
46900298 | 1121 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1122 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1123 | |
1124 | ifmgd->assoc_tries++; | |
1125 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1126 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1127 | " timed out\n", |
46900298 JB |
1128 | sdata->dev->name, ifmgd->bssid); |
1129 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1130 | ieee80211_sta_send_apinfo(sdata); | |
1131 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1132 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1133 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1134 | /* |
1135 | * We might have a pending scan which had no chance to run yet | |
1136 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1137 | * Hence, queue the STAs work again | |
1138 | */ | |
1139 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1140 | return; |
1141 | } | |
1142 | ||
46900298 | 1143 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1144 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1145 | sdata->dev->name, ifmgd->bssid); |
1146 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1147 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1148 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1149 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1150 | return; |
1151 | } | |
1152 | ||
46900298 | 1153 | ieee80211_send_assoc(sdata); |
f0706e82 | 1154 | |
46900298 | 1155 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1156 | } |
1157 | ||
3cf335d5 KV |
1158 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1159 | struct ieee80211_hdr *hdr) | |
1160 | { | |
1161 | /* | |
1162 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1163 | * from AP because we know that the connection is working both ways | |
1164 | * at that time. But multicast frames (and hence also beacons) must | |
1165 | * be ignored here, because we need to trigger the timer during | |
1166 | * data idle periods for sending the periodical probe request to | |
1167 | * the AP. | |
1168 | */ | |
1169 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1170 | mod_timer(&sdata->u.mgd.timer, | |
1171 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1172 | } | |
f0706e82 | 1173 | |
04de8381 KV |
1174 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1175 | { | |
1176 | struct ieee80211_sub_if_data *sdata = | |
1177 | container_of(work, struct ieee80211_sub_if_data, | |
1178 | u.mgd.beacon_loss_work); | |
1179 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1180 | ||
a860402d MB |
1181 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1182 | if (net_ratelimit()) { | |
1183 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1184 | "- sending probe request\n", sdata->dev->name, | |
1185 | sdata->u.mgd.bssid); | |
1186 | } | |
1187 | #endif | |
04de8381 KV |
1188 | |
1189 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1190 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1191 | ifmgd->ssid_len, NULL, 0); | |
1192 | ||
1193 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL); | |
1194 | } | |
1195 | ||
1196 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1197 | { | |
1198 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1199 | ||
1200 | queue_work(sdata->local->hw.workqueue, | |
1201 | &sdata->u.mgd.beacon_loss_work); | |
1202 | } | |
1203 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1204 | ||
46900298 | 1205 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1206 | { |
46900298 | 1207 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1208 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1209 | struct sta_info *sta; |
15b7b062 | 1210 | bool disassoc = false; |
f0706e82 JB |
1211 | |
1212 | /* TODO: start monitoring current AP signal quality and number of | |
1213 | * missed beacons. Scan other channels every now and then and search | |
1214 | * for better APs. */ | |
1215 | /* TODO: remove expired BSSes */ | |
1216 | ||
46900298 | 1217 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1218 | |
d0709a65 JB |
1219 | rcu_read_lock(); |
1220 | ||
46900298 | 1221 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1222 | if (!sta) { |
0c68ae26 | 1223 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1224 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1225 | disassoc = true; |
1226 | goto unlock; | |
1227 | } | |
1228 | ||
1229 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
1230 | time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
1231 | printk(KERN_DEBUG "%s: no probe response from AP %pM " | |
1232 | "- disassociating\n", | |
1233 | sdata->dev->name, ifmgd->bssid); | |
1234 | disassoc = true; | |
1235 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1236 | goto unlock; | |
1237 | } | |
1238 | ||
04de8381 KV |
1239 | /* |
1240 | * Beacon filtering is only enabled with power save and then the | |
1241 | * stack should not check for beacon loss. | |
1242 | */ | |
1243 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1244 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1245 | time_after(jiffies, | |
15b7b062 | 1246 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1247 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1248 | if (net_ratelimit()) { | |
1249 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1250 | "- sending probe request\n", | |
1251 | sdata->dev->name, ifmgd->bssid); | |
1252 | } | |
1253 | #endif | |
15b7b062 KV |
1254 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1255 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1256 | ifmgd->ssid_len, NULL, 0); | |
1257 | goto unlock; | |
1258 | ||
1259 | } | |
1260 | ||
1261 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1262 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1263 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1264 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1265 | } |
d0709a65 | 1266 | |
15b7b062 | 1267 | unlock: |
d0709a65 JB |
1268 | rcu_read_unlock(); |
1269 | ||
7a947080 | 1270 | if (disassoc) |
46900298 | 1271 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1272 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1273 | else |
46900298 | 1274 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1275 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1276 | } |
1277 | ||
1278 | ||
46900298 | 1279 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1280 | { |
46900298 JB |
1281 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1282 | ||
f698d856 | 1283 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1284 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1285 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1286 | /* Wait for SME to request association */ | |
1287 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1288 | } else | |
1289 | ieee80211_associate(sdata); | |
f0706e82 JB |
1290 | } |
1291 | ||
1292 | ||
f698d856 | 1293 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1294 | struct ieee80211_mgmt *mgmt, |
1295 | size_t len) | |
1296 | { | |
1297 | u8 *pos; | |
1298 | struct ieee802_11_elems elems; | |
1299 | ||
f0706e82 | 1300 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1301 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1302 | if (!elems.challenge) |
f0706e82 | 1303 | return; |
46900298 JB |
1304 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1305 | elems.challenge - 2, elems.challenge_len + 2, | |
1306 | sdata->u.mgd.bssid, 1); | |
1307 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1308 | } |
1309 | ||
f698d856 | 1310 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1311 | struct ieee80211_mgmt *mgmt, |
1312 | size_t len) | |
1313 | { | |
46900298 | 1314 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1315 | u16 auth_alg, auth_transaction, status_code; |
1316 | ||
46900298 | 1317 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1318 | return; |
f0706e82 | 1319 | |
f4ea83dd | 1320 | if (len < 24 + 6) |
f0706e82 | 1321 | return; |
f0706e82 | 1322 | |
46900298 | 1323 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1324 | return; |
f0706e82 | 1325 | |
46900298 | 1326 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1327 | return; |
f0706e82 JB |
1328 | |
1329 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1330 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1331 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1332 | ||
46900298 JB |
1333 | if (auth_alg != ifmgd->auth_alg || |
1334 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1335 | return; |
f0706e82 JB |
1336 | |
1337 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1338 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1339 | u8 algs[3]; | |
1340 | const int num_algs = ARRAY_SIZE(algs); | |
1341 | int i, pos; | |
1342 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1343 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1344 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1345 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1346 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1347 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1348 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1349 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1350 | pos = 0; |
46900298 | 1351 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1352 | pos = 1; |
1353 | else | |
1354 | pos = 2; | |
1355 | for (i = 0; i < num_algs; i++) { | |
1356 | pos++; | |
1357 | if (pos >= num_algs) | |
1358 | pos = 0; | |
46900298 | 1359 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1360 | algs[pos] == 0xff) |
1361 | continue; | |
1362 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1363 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1364 | continue; |
46900298 | 1365 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1366 | break; |
1367 | } | |
1368 | } | |
1369 | return; | |
1370 | } | |
1371 | ||
46900298 | 1372 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1373 | case WLAN_AUTH_OPEN: |
1374 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1375 | case WLAN_AUTH_FT: |
46900298 | 1376 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1377 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1378 | break; |
1379 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1380 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1381 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1382 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1383 | } else | |
46900298 | 1384 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1385 | break; |
1386 | } | |
1387 | } | |
1388 | ||
1389 | ||
f698d856 | 1390 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1391 | struct ieee80211_mgmt *mgmt, |
1392 | size_t len) | |
1393 | { | |
46900298 | 1394 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1395 | u16 reason_code; |
1396 | ||
f4ea83dd | 1397 | if (len < 24 + 2) |
f0706e82 | 1398 | return; |
f0706e82 | 1399 | |
46900298 | 1400 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1401 | return; |
f0706e82 JB |
1402 | |
1403 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1404 | ||
46900298 | 1405 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1406 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1407 | sdata->dev->name, reason_code); | |
f0706e82 | 1408 | |
636a5d36 JM |
1409 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1410 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1411 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1412 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1413 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1414 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1415 | IEEE80211_RETRY_AUTH_INTERVAL); |
1416 | } | |
1417 | ||
46900298 JB |
1418 | ieee80211_set_disassoc(sdata, true, false, 0); |
1419 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1420 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1421 | } |
1422 | ||
1423 | ||
f698d856 | 1424 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1425 | struct ieee80211_mgmt *mgmt, |
1426 | size_t len) | |
1427 | { | |
46900298 | 1428 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1429 | u16 reason_code; |
1430 | ||
f4ea83dd | 1431 | if (len < 24 + 2) |
f0706e82 | 1432 | return; |
f0706e82 | 1433 | |
46900298 | 1434 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1435 | return; |
f0706e82 JB |
1436 | |
1437 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1438 | ||
46900298 | 1439 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1440 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1441 | sdata->dev->name, reason_code); | |
f0706e82 | 1442 | |
636a5d36 JM |
1443 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1444 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1445 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1446 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1447 | IEEE80211_RETRY_AUTH_INTERVAL); |
1448 | } | |
1449 | ||
46900298 | 1450 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1451 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1452 | } |
1453 | ||
1454 | ||
471b3efd | 1455 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1456 | struct ieee80211_mgmt *mgmt, |
1457 | size_t len, | |
1458 | int reassoc) | |
1459 | { | |
46900298 | 1460 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1461 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1462 | struct ieee80211_supported_band *sband; |
f0706e82 | 1463 | struct sta_info *sta; |
881d948c | 1464 | u32 rates, basic_rates; |
f0706e82 JB |
1465 | u16 capab_info, status_code, aid; |
1466 | struct ieee802_11_elems elems; | |
bda3933a | 1467 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1468 | u8 *pos; |
ae5eb026 | 1469 | u32 changed = 0; |
f0706e82 | 1470 | int i, j; |
ddf4ac53 | 1471 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1472 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1473 | |
1474 | /* AssocResp and ReassocResp have identical structure, so process both | |
1475 | * of them in this function. */ | |
1476 | ||
46900298 | 1477 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1478 | return; |
f0706e82 | 1479 | |
f4ea83dd | 1480 | if (len < 24 + 6) |
f0706e82 | 1481 | return; |
f0706e82 | 1482 | |
46900298 | 1483 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1484 | return; |
f0706e82 JB |
1485 | |
1486 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1487 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1488 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1489 | |
0c68ae26 | 1490 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1491 | "status=%d aid=%d)\n", |
0c68ae26 | 1492 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1493 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1494 | |
63a5ab82 JM |
1495 | pos = mgmt->u.assoc_resp.variable; |
1496 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1497 | ||
1498 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1499 | elems.timeout_int && elems.timeout_int_len == 5 && |
1500 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1501 | u32 tu, ms; |
f797eb7e | 1502 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1503 | ms = tu * 1024 / 1000; |
1504 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1505 | "comeback duration %u TU (%u ms)\n", | |
1506 | sdata->dev->name, tu, ms); | |
1507 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1508 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1509 | jiffies + msecs_to_jiffies(ms)); |
1510 | return; | |
1511 | } | |
1512 | ||
f0706e82 JB |
1513 | if (status_code != WLAN_STATUS_SUCCESS) { |
1514 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1515 | sdata->dev->name, status_code); |
8a69aa93 DD |
1516 | /* if this was a reassociation, ensure we try a "full" |
1517 | * association next time. This works around some broken APs | |
1518 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1519 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1520 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1521 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1522 | /* Wait for SME to decide what to do next */ | |
1523 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1524 | } | |
f0706e82 JB |
1525 | return; |
1526 | } | |
1527 | ||
1dd84aa2 JB |
1528 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1529 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1530 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1531 | aid &= ~(BIT(15) | BIT(14)); |
1532 | ||
f0706e82 JB |
1533 | if (!elems.supp_rates) { |
1534 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1535 | sdata->dev->name); |
f0706e82 JB |
1536 | return; |
1537 | } | |
1538 | ||
f698d856 | 1539 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1540 | ifmgd->aid = aid; |
1541 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1542 | |
46900298 JB |
1543 | kfree(ifmgd->assocresp_ies); |
1544 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1545 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1546 | if (ifmgd->assocresp_ies) | |
1547 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1548 | |
d0709a65 JB |
1549 | rcu_read_lock(); |
1550 | ||
f0706e82 | 1551 | /* Add STA entry for the AP */ |
46900298 | 1552 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1553 | if (!sta) { |
ddf4ac53 | 1554 | newsta = true; |
d0709a65 | 1555 | |
46900298 | 1556 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1557 | if (!sta) { |
1558 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1559 | " the AP\n", sdata->dev->name); |
d0709a65 | 1560 | rcu_read_unlock(); |
f0706e82 JB |
1561 | return; |
1562 | } | |
f709fc69 | 1563 | |
60f8b39c JB |
1564 | /* update new sta with its last rx activity */ |
1565 | sta->last_rx = jiffies; | |
f709fc69 | 1566 | } |
f709fc69 | 1567 | |
60f8b39c JB |
1568 | /* |
1569 | * FIXME: Do we really need to update the sta_info's information here? | |
1570 | * We already know about the AP (we found it in our list) so it | |
1571 | * should already be filled with the right info, no? | |
1572 | * As is stands, all this is racy because typically we assume | |
1573 | * the information that is filled in here (except flags) doesn't | |
1574 | * change while a STA structure is alive. As such, it should move | |
1575 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1576 | */ | |
f709fc69 | 1577 | |
60f8b39c JB |
1578 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1579 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1580 | |
60f8b39c JB |
1581 | rates = 0; |
1582 | basic_rates = 0; | |
1583 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1584 | |
60f8b39c JB |
1585 | for (i = 0; i < elems.supp_rates_len; i++) { |
1586 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1587 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1588 | |
60f8b39c JB |
1589 | if (rate > 110) |
1590 | have_higher_than_11mbit = true; | |
1591 | ||
1592 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1593 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1594 | rates |= BIT(j); |
d61272cb TW |
1595 | if (is_basic) |
1596 | basic_rates |= BIT(j); | |
1597 | break; | |
1598 | } | |
f709fc69 | 1599 | } |
f709fc69 LCC |
1600 | } |
1601 | ||
60f8b39c JB |
1602 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1603 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1604 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1605 | |
60f8b39c JB |
1606 | if (rate > 110) |
1607 | have_higher_than_11mbit = true; | |
f0706e82 | 1608 | |
60f8b39c | 1609 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1610 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1611 | rates |= BIT(j); |
d61272cb TW |
1612 | if (is_basic) |
1613 | basic_rates |= BIT(j); | |
1614 | break; | |
1615 | } | |
60f8b39c | 1616 | } |
1ebebea8 | 1617 | } |
f0706e82 | 1618 | |
323ce79a | 1619 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1620 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1621 | |
1622 | /* cf. IEEE 802.11 9.2.12 */ | |
1623 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1624 | have_higher_than_11mbit) | |
1625 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1626 | else | |
1627 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1628 | |
e65c2263 S |
1629 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1630 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1631 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1632 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1633 | |
1634 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1635 | |
4b7679a5 | 1636 | rate_control_rate_init(sta); |
f0706e82 | 1637 | |
46900298 | 1638 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1639 | set_sta_flags(sta, WLAN_STA_MFP); |
1640 | ||
ddf4ac53 | 1641 | if (elems.wmm_param) |
60f8b39c | 1642 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1643 | |
1644 | if (newsta) { | |
1645 | int err = sta_info_insert(sta); | |
1646 | if (err) { | |
1647 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1648 | " the AP (error %d)\n", sdata->dev->name, err); | |
1649 | rcu_read_unlock(); | |
1650 | return; | |
1651 | } | |
1652 | } | |
1653 | ||
1654 | rcu_read_unlock(); | |
1655 | ||
1656 | if (elems.wmm_param) | |
46900298 | 1657 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1658 | elems.wmm_param_len); |
f0706e82 | 1659 | |
ae5eb026 | 1660 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1661 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1662 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1663 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1664 | ap_ht_cap_flags); | |
1665 | ||
60f8b39c JB |
1666 | /* set AID and assoc capability, |
1667 | * ieee80211_set_associated() will tell the driver */ | |
1668 | bss_conf->aid = aid; | |
1669 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1670 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1671 | |
15b7b062 KV |
1672 | /* |
1673 | * initialise the time of last beacon to be the association time, | |
1674 | * otherwise beacon loss check will trigger immediately | |
1675 | */ | |
1676 | ifmgd->last_beacon = jiffies; | |
1677 | ||
46900298 | 1678 | ieee80211_associated(sdata); |
6039f6d2 | 1679 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1680 | } |
1681 | ||
1682 | ||
98c8fccf JB |
1683 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1684 | struct ieee80211_mgmt *mgmt, | |
1685 | size_t len, | |
1686 | struct ieee80211_rx_status *rx_status, | |
1687 | struct ieee802_11_elems *elems, | |
1688 | bool beacon) | |
1689 | { | |
1690 | struct ieee80211_local *local = sdata->local; | |
1691 | int freq; | |
c2b13452 | 1692 | struct ieee80211_bss *bss; |
98c8fccf | 1693 | struct ieee80211_channel *channel; |
98c8fccf JB |
1694 | |
1695 | if (elems->ds_params && elems->ds_params_len == 1) | |
1696 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1697 | else | |
1698 | freq = rx_status->freq; | |
1699 | ||
1700 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1701 | ||
1702 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1703 | return; | |
1704 | ||
98c8fccf | 1705 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1706 | channel, beacon); |
98c8fccf JB |
1707 | if (!bss) |
1708 | return; | |
1709 | ||
c481ec97 | 1710 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1711 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1712 | struct ieee80211_channel_sw_ie *sw_elem = |
1713 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1714 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1715 | } | |
1716 | ||
3e122be0 | 1717 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1718 | } |
1719 | ||
1720 | ||
f698d856 | 1721 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1722 | struct ieee80211_mgmt *mgmt, |
1723 | size_t len, | |
1724 | struct ieee80211_rx_status *rx_status) | |
1725 | { | |
15b7b062 | 1726 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1727 | size_t baselen; |
1728 | struct ieee802_11_elems elems; | |
1729 | ||
15b7b062 KV |
1730 | ifmgd = &sdata->u.mgd; |
1731 | ||
8e7cdbb6 TW |
1732 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1733 | return; /* ignore ProbeResp to foreign address */ | |
1734 | ||
ae6a44e3 EK |
1735 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1736 | if (baselen > len) | |
1737 | return; | |
1738 | ||
1739 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1740 | &elems); | |
1741 | ||
98c8fccf | 1742 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1743 | |
1744 | /* direct probe may be part of the association flow */ | |
1745 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
15b7b062 | 1746 | &ifmgd->request)) { |
9859b81e RR |
1747 | printk(KERN_DEBUG "%s direct probe responded\n", |
1748 | sdata->dev->name); | |
46900298 | 1749 | ieee80211_authenticate(sdata); |
9859b81e | 1750 | } |
15b7b062 KV |
1751 | |
1752 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1753 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1754 | } |
1755 | ||
d91f36db JB |
1756 | /* |
1757 | * This is the canonical list of information elements we care about, | |
1758 | * the filter code also gives us all changes to the Microsoft OUI | |
1759 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1760 | * | |
1761 | * We implement beacon filtering in software since that means we can | |
1762 | * avoid processing the frame here and in cfg80211, and userspace | |
1763 | * will not be able to tell whether the hardware supports it or not. | |
1764 | * | |
1765 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1766 | * add items it requires. It also needs to be able to tell us to | |
1767 | * look out for other vendor IEs. | |
1768 | */ | |
1769 | static const u64 care_about_ies = | |
1770 | BIT(WLAN_EID_COUNTRY) | | |
1771 | BIT(WLAN_EID_ERP_INFO) | | |
1772 | BIT(WLAN_EID_CHANNEL_SWITCH) | | |
1773 | BIT(WLAN_EID_PWR_CONSTRAINT) | | |
1774 | BIT(WLAN_EID_HT_CAPABILITY) | | |
1775 | BIT(WLAN_EID_HT_INFORMATION); | |
1776 | ||
f698d856 | 1777 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1778 | struct ieee80211_mgmt *mgmt, |
1779 | size_t len, | |
1780 | struct ieee80211_rx_status *rx_status) | |
1781 | { | |
d91f36db | 1782 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1783 | size_t baselen; |
1784 | struct ieee802_11_elems elems; | |
f698d856 | 1785 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1786 | u32 changed = 0; |
d91f36db | 1787 | bool erp_valid, directed_tim = false; |
7a5158ef | 1788 | u8 erp_value = 0; |
d91f36db | 1789 | u32 ncrc; |
f0706e82 | 1790 | |
ae6a44e3 EK |
1791 | /* Process beacon from the current BSS */ |
1792 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1793 | if (baselen > len) | |
1794 | return; | |
1795 | ||
d91f36db | 1796 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1797 | return; |
f0706e82 | 1798 | |
46900298 JB |
1799 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1800 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1801 | return; |
1802 | ||
d91f36db JB |
1803 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1804 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1805 | len - baselen, &elems, | |
1806 | care_about_ies, ncrc); | |
1807 | ||
1808 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
1809 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); | |
1810 | ||
1811 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1812 | ||
1813 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1814 | return; |
d91f36db JB |
1815 | ifmgd->beacon_crc = ncrc; |
1816 | ||
1817 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1818 | |
46900298 | 1819 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1820 | elems.wmm_param_len); |
1821 | ||
25c9c875 | 1822 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1823 | if (directed_tim) { |
572e0012 KV |
1824 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1825 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1826 | ieee80211_hw_config(local, | |
1827 | IEEE80211_CONF_CHANGE_PS); | |
1828 | ieee80211_send_nullfunc(local, sdata, 0); | |
1829 | } else { | |
1830 | local->pspolling = true; | |
1831 | ||
1832 | /* | |
1833 | * Here is assumed that the driver will be | |
1834 | * able to send ps-poll frame and receive a | |
1835 | * response even though power save mode is | |
1836 | * enabled, but some drivers might require | |
1837 | * to disable power save here. This needs | |
1838 | * to be investigated. | |
1839 | */ | |
1840 | ieee80211_send_pspoll(local, sdata); | |
1841 | } | |
a97b77b9 VN |
1842 | } |
1843 | } | |
7a5158ef JB |
1844 | |
1845 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1846 | erp_valid = true; | |
1847 | erp_value = elems.erp_info[0]; | |
1848 | } else { | |
1849 | erp_valid = false; | |
50c4afb9 | 1850 | } |
7a5158ef JB |
1851 | changed |= ieee80211_handle_bss_capability(sdata, |
1852 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1853 | erp_valid, erp_value); | |
f0706e82 | 1854 | |
d3c990fb | 1855 | |
53d6f81c | 1856 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1857 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1858 | struct sta_info *sta; |
1859 | struct ieee80211_supported_band *sband; | |
1860 | u16 ap_ht_cap_flags; | |
1861 | ||
1862 | rcu_read_lock(); | |
1863 | ||
46900298 | 1864 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1865 | if (!sta) { |
1866 | rcu_read_unlock(); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1871 | ||
1872 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1873 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1874 | ||
1875 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1876 | ||
1877 | rcu_read_unlock(); | |
1878 | ||
1879 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1880 | ap_ht_cap_flags); | |
d3c990fb RR |
1881 | } |
1882 | ||
3f2355cb LR |
1883 | if (elems.country_elem) { |
1884 | /* Note we are only reviewing this on beacons | |
1885 | * for the BSSID we are associated to */ | |
1886 | regulatory_hint_11d(local->hw.wiphy, | |
1887 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1888 | |
1889 | /* TODO: IBSS also needs this */ | |
1890 | if (elems.pwr_constr_elem) | |
1891 | ieee80211_handle_pwr_constr(sdata, | |
1892 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1893 | elems.pwr_constr_elem, | |
1894 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1895 | } |
1896 | ||
471b3efd | 1897 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1898 | } |
1899 | ||
46900298 JB |
1900 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1901 | struct sk_buff *skb, | |
1902 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1903 | { |
f698d856 | 1904 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1905 | struct ieee80211_mgmt *mgmt; |
1906 | u16 fc; | |
1907 | ||
1908 | if (skb->len < 24) | |
46900298 | 1909 | return RX_DROP_MONITOR; |
f0706e82 JB |
1910 | |
1911 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1912 | fc = le16_to_cpu(mgmt->frame_control); | |
1913 | ||
1914 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1915 | case IEEE80211_STYPE_PROBE_REQ: | |
1916 | case IEEE80211_STYPE_PROBE_RESP: | |
1917 | case IEEE80211_STYPE_BEACON: | |
1918 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1919 | case IEEE80211_STYPE_AUTH: | |
1920 | case IEEE80211_STYPE_ASSOC_RESP: | |
1921 | case IEEE80211_STYPE_REASSOC_RESP: | |
1922 | case IEEE80211_STYPE_DEAUTH: | |
1923 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1924 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1925 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1926 | return RX_QUEUED; | |
f0706e82 JB |
1927 | } |
1928 | ||
46900298 | 1929 | return RX_DROP_MONITOR; |
f0706e82 JB |
1930 | } |
1931 | ||
f698d856 | 1932 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1933 | struct sk_buff *skb) |
1934 | { | |
1935 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1936 | struct ieee80211_mgmt *mgmt; |
1937 | u16 fc; | |
1938 | ||
f0706e82 JB |
1939 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1940 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1941 | fc = le16_to_cpu(mgmt->frame_control); | |
1942 | ||
46900298 JB |
1943 | switch (fc & IEEE80211_FCTL_STYPE) { |
1944 | case IEEE80211_STYPE_PROBE_RESP: | |
1945 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1946 | rx_status); | |
1947 | break; | |
1948 | case IEEE80211_STYPE_BEACON: | |
1949 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1950 | rx_status); | |
1951 | break; | |
1952 | case IEEE80211_STYPE_AUTH: | |
1953 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1954 | break; | |
1955 | case IEEE80211_STYPE_ASSOC_RESP: | |
1956 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1957 | break; | |
1958 | case IEEE80211_STYPE_REASSOC_RESP: | |
1959 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1960 | break; | |
1961 | case IEEE80211_STYPE_DEAUTH: | |
1962 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1963 | break; | |
1964 | case IEEE80211_STYPE_DISASSOC: | |
1965 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1966 | break; | |
f0706e82 JB |
1967 | } |
1968 | ||
1969 | kfree_skb(skb); | |
1970 | } | |
1971 | ||
9c6bd790 | 1972 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1973 | { |
60f8b39c JB |
1974 | struct ieee80211_sub_if_data *sdata = |
1975 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1976 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1977 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1978 | |
46900298 JB |
1979 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1980 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1981 | } |
1982 | ||
46900298 | 1983 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1984 | { |
46900298 | 1985 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1986 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1987 | |
1988 | if (local->ops->reset_tsf) { | |
1989 | /* Reset own TSF to allow time synchronization work. */ | |
1990 | local->ops->reset_tsf(local_to_hw(local)); | |
1991 | } | |
1992 | ||
46900298 | 1993 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1994 | |
1995 | ||
46900298 JB |
1996 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1997 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1998 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1999 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2000 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2001 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
2002 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
2003 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 2004 | else |
46900298 JB |
2005 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
2006 | ifmgd->auth_transaction = -1; | |
2007 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2008 | ifmgd->assoc_scan_tries = 0; | |
2009 | ifmgd->direct_probe_tries = 0; | |
2010 | ifmgd->auth_tries = 0; | |
2011 | ifmgd->assoc_tries = 0; | |
24e64622 | 2012 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2013 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2014 | } |
2015 | ||
46900298 | 2016 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2017 | { |
46900298 | 2018 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2019 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2020 | struct ieee80211_bss *bss; |
46900298 JB |
2021 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2022 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2023 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2024 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2025 | struct ieee80211_channel *chan = local->oper_channel; | |
2026 | ||
636a5d36 JM |
2027 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2028 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2029 | IEEE80211_STA_AUTO_BSSID_SEL | |
2030 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2031 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2032 | if (sdata->default_key) | |
2033 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2034 | } |
9d139c81 | 2035 | |
46900298 | 2036 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2037 | chan = NULL; |
2038 | ||
46900298 | 2039 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2040 | bssid = NULL; |
2041 | ||
46900298 | 2042 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2043 | ssid = NULL; |
2044 | ssid_len = 0; | |
2045 | } | |
2046 | ||
2047 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2048 | bssid, ssid, ssid_len, | |
2049 | capa_mask, capa_val); | |
2050 | ||
2051 | if (bss) { | |
2052 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2053 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2054 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2055 | bss->ssid_len); | |
2056 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2057 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2058 | bss->supp_rates); | |
46900298 JB |
2059 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2060 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2061 | else |
46900298 | 2062 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2063 | |
9c6bd790 JB |
2064 | /* Send out direct probe if no probe resp was received or |
2065 | * the one we have is outdated | |
2066 | */ | |
00d3f14c JB |
2067 | if (!bss->last_probe_resp || |
2068 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2069 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2070 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2071 | else |
46900298 | 2072 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2073 | |
00d3f14c | 2074 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2075 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2076 | return 0; |
2077 | } else { | |
46900298 JB |
2078 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
2079 | ifmgd->assoc_scan_tries++; | |
2a519311 JB |
2080 | /* XXX maybe racy? */ |
2081 | if (local->scan_req) | |
2082 | return -1; | |
2083 | memcpy(local->int_scan_req.ssids[0].ssid, | |
46900298 JB |
2084 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); |
2085 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
2a519311 | 2086 | local->int_scan_req.ssids[0].ssid_len = 0; |
9c6bd790 | 2087 | else |
46900298 | 2088 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; |
af88b907 HS |
2089 | |
2090 | if (ieee80211_start_scan(sdata, &local->int_scan_req)) | |
2091 | ieee80211_scan_failed(local); | |
2092 | ||
46900298 JB |
2093 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2094 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2095 | } else { |
46900298 JB |
2096 | ifmgd->assoc_scan_tries = 0; |
2097 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 2098 | } |
9c6bd790 JB |
2099 | } |
2100 | return -1; | |
2101 | } | |
2102 | ||
2103 | ||
2104 | static void ieee80211_sta_work(struct work_struct *work) | |
2105 | { | |
2106 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2107 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2108 | struct ieee80211_local *local = sdata->local; |
46900298 | 2109 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2110 | struct sk_buff *skb; |
2111 | ||
2112 | if (!netif_running(sdata->dev)) | |
2113 | return; | |
2114 | ||
c2b13452 | 2115 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2116 | return; |
2117 | ||
46900298 | 2118 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2119 | return; |
46900298 | 2120 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2121 | |
46900298 | 2122 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2123 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2124 | ||
46900298 JB |
2125 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2126 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2127 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2128 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
af88b907 HS |
2129 | /* |
2130 | * The call to ieee80211_start_scan can fail but ieee80211_request_scan | |
2131 | * (which queued ieee80211_sta_work) did not return an error. Thus, call | |
2132 | * ieee80211_scan_failed here if ieee80211_start_scan fails in order to | |
2133 | * notify the scan requester. | |
2134 | */ | |
2135 | if (ieee80211_start_scan(sdata, local->scan_req)) | |
2136 | ieee80211_scan_failed(local); | |
9c6bd790 | 2137 | return; |
f0706e82 JB |
2138 | } |
2139 | ||
46900298 JB |
2140 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2141 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2142 | return; |
46900298 JB |
2143 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2144 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2145 | return; |
d6f2da5b | 2146 | |
46900298 | 2147 | switch (ifmgd->state) { |
9c6bd790 JB |
2148 | case IEEE80211_STA_MLME_DISABLED: |
2149 | break; | |
2150 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2151 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2152 | break; |
2153 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2154 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2155 | break; |
2156 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2157 | ieee80211_associate(sdata); |
9c6bd790 JB |
2158 | break; |
2159 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2160 | ieee80211_associated(sdata); |
9c6bd790 JB |
2161 | break; |
2162 | default: | |
2163 | WARN_ON(1); | |
2164 | break; | |
2165 | } | |
2166 | ||
46900298 | 2167 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2168 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2169 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2170 | ||
46900298 | 2171 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2172 | WLAN_REASON_UNSPECIFIED); |
2173 | } | |
f0706e82 JB |
2174 | } |
2175 | ||
9c6bd790 JB |
2176 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2177 | { | |
ad935687 KV |
2178 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2179 | /* | |
2180 | * Need to update last_beacon to avoid beacon loss | |
2181 | * test to trigger. | |
2182 | */ | |
2183 | sdata->u.mgd.last_beacon = jiffies; | |
2184 | ||
2185 | ||
9c6bd790 | 2186 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2187 | &sdata->u.mgd.work); |
ad935687 | 2188 | } |
9c6bd790 | 2189 | } |
f0706e82 | 2190 | |
9c6bd790 JB |
2191 | /* interface setup */ |
2192 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2193 | { |
46900298 | 2194 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 2195 | |
46900298 JB |
2196 | ifmgd = &sdata->u.mgd; |
2197 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2198 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2199 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2200 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2201 | (unsigned long) sdata); |
46900298 | 2202 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2203 | (unsigned long) sdata); |
46900298 | 2204 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2205 | |
46900298 JB |
2206 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2207 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2208 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2209 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2210 | IEEE80211_STA_AUTO_BSSID_SEL | |
2211 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2212 | if (sdata->local->hw.queues >= 4) |
46900298 | 2213 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
f0706e82 JB |
2214 | } |
2215 | ||
9c6bd790 | 2216 | /* configuration hooks */ |
46900298 | 2217 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2218 | { |
46900298 | 2219 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2220 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2221 | |
46900298 | 2222 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2223 | return; |
60f8b39c | 2224 | |
46900298 | 2225 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2226 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2227 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2228 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2229 | |
46900298 JB |
2230 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2231 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2232 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2233 | |
636a5d36 JM |
2234 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2235 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2236 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2237 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2238 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2239 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2240 | } |
2241 | } | |
60f8b39c | 2242 | |
79f6440c AF |
2243 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2244 | { | |
2245 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2246 | ||
79f6440c AF |
2247 | if (ifmgd->ssid_len) |
2248 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2249 | else | |
2250 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2251 | ||
2252 | return 0; | |
2253 | } | |
2254 | ||
9c6bd790 JB |
2255 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2256 | { | |
46900298 | 2257 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2258 | |
9c6bd790 JB |
2259 | if (len > IEEE80211_MAX_SSID_LEN) |
2260 | return -EINVAL; | |
2261 | ||
46900298 | 2262 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2263 | |
46900298 | 2264 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2265 | /* |
2266 | * Do not use reassociation if SSID is changed (different ESS). | |
2267 | */ | |
2268 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2269 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2270 | memcpy(ifmgd->ssid, ssid, len); | |
2271 | ifmgd->ssid_len = len; | |
60f8b39c | 2272 | } |
60f8b39c | 2273 | |
79f6440c | 2274 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2275 | } |
2276 | ||
2277 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2278 | { | |
46900298 JB |
2279 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2280 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2281 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2282 | return 0; |
2283 | } | |
2284 | ||
2285 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2286 | { | |
46900298 | 2287 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2288 | |
dfe67012 | 2289 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2290 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2291 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2292 | } else { |
46900298 JB |
2293 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2294 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2295 | } |
2296 | ||
2297 | if (netif_running(sdata->dev)) { | |
2298 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
9c6bd790 JB |
2299 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
2300 | "the low-level driver\n", sdata->dev->name); | |
9c6bd790 JB |
2301 | } |
2302 | } | |
60f8b39c | 2303 | |
79f6440c | 2304 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2305 | } |
2306 | ||
636a5d36 JM |
2307 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2308 | const char *ie, size_t len) | |
9c6bd790 | 2309 | { |
46900298 | 2310 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2311 | |
46900298 | 2312 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2313 | if (len == 0) { |
46900298 JB |
2314 | ifmgd->extra_ie = NULL; |
2315 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2316 | return 0; |
60f8b39c | 2317 | } |
46900298 JB |
2318 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2319 | if (!ifmgd->extra_ie) { | |
2320 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2321 | return -ENOMEM; |
2322 | } | |
46900298 JB |
2323 | memcpy(ifmgd->extra_ie, ie, len); |
2324 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2325 | return 0; |
60f8b39c JB |
2326 | } |
2327 | ||
f698d856 | 2328 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2329 | { |
f4ea83dd | 2330 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2331 | sdata->dev->name, reason); |
f0706e82 | 2332 | |
46900298 | 2333 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2334 | return -EINVAL; |
2335 | ||
46900298 | 2336 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2337 | return 0; |
2338 | } | |
2339 | ||
f698d856 | 2340 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2341 | { |
46900298 | 2342 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2343 | |
f4ea83dd | 2344 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2345 | sdata->dev->name, reason); |
f0706e82 | 2346 | |
05c914fe | 2347 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2348 | return -EINVAL; |
2349 | ||
46900298 JB |
2350 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2351 | return -ENOLINK; | |
f0706e82 | 2352 | |
46900298 | 2353 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2354 | return 0; |
2355 | } | |
84363e6e | 2356 | |
9c6bd790 JB |
2357 | /* scan finished notification */ |
2358 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2359 | { | |
2360 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2361 | |
2362 | /* Restart STA timers */ | |
2363 | rcu_read_lock(); | |
2364 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2365 | ieee80211_restart_sta_timer(sdata); | |
2366 | rcu_read_unlock(); | |
2367 | } | |
10f644a4 JB |
2368 | |
2369 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2370 | unsigned long data, void *dummy) | |
2371 | { | |
2372 | s32 latency_usec = (s32) data; | |
2373 | struct ieee80211_local *local = | |
2374 | container_of(nb, struct ieee80211_local, | |
2375 | network_latency_notifier); | |
2376 | ||
2377 | mutex_lock(&local->iflist_mtx); | |
2378 | ieee80211_recalc_ps(local, latency_usec); | |
2379 | mutex_unlock(&local->iflist_mtx); | |
2380 | ||
2381 | return 0; | |
2382 | } |