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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" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
15b7b062 | 36 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 37 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 38 | |
5484e237 JB |
39 | /* utils */ |
40 | static int ecw2cw(int ecw) | |
60f8b39c | 41 | { |
5484e237 | 42 | return (1 << ecw) - 1; |
60f8b39c JB |
43 | } |
44 | ||
c2b13452 | 45 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
46 | { |
47 | u8 *end, *pos; | |
48 | ||
00d3f14c | 49 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
50 | if (pos == NULL) |
51 | return NULL; | |
00d3f14c | 52 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
53 | |
54 | while (pos + 1 < end) { | |
55 | if (pos + 2 + pos[1] > end) | |
56 | break; | |
57 | if (pos[0] == ie) | |
58 | return pos; | |
59 | pos += 2 + pos[1]; | |
60 | } | |
61 | ||
62 | return NULL; | |
63 | } | |
64 | ||
c2b13452 | 65 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 66 | struct ieee80211_supported_band *sband, |
881d948c | 67 | u32 *rates) |
9ac19a90 JB |
68 | { |
69 | int i, j, count; | |
70 | *rates = 0; | |
71 | count = 0; | |
72 | for (i = 0; i < bss->supp_rates_len; i++) { | |
73 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
74 | ||
75 | for (j = 0; j < sband->n_bitrates; j++) | |
76 | if (sband->bitrates[j].bitrate == rate) { | |
77 | *rates |= BIT(j); | |
78 | count++; | |
79 | break; | |
80 | } | |
81 | } | |
82 | ||
83 | return count; | |
84 | } | |
85 | ||
d5522e03 JB |
86 | /* |
87 | * ieee80211_enable_ht should be called only after the operating band | |
88 | * has been determined as ht configuration depends on the hw's | |
89 | * HT abilities for a specific band. | |
90 | */ | |
91 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
92 | struct ieee80211_ht_info *hti, | |
93 | u16 ap_ht_cap_flags) | |
94 | { | |
95 | struct ieee80211_local *local = sdata->local; | |
96 | struct ieee80211_supported_band *sband; | |
97 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
98 | struct ieee80211_bss_ht_conf ht; | |
99 | struct sta_info *sta; | |
100 | u32 changed = 0; | |
101 | bool enable_ht = true, ht_changed; | |
102 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
103 | ||
104 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
105 | ||
106 | memset(&ht, 0, sizeof(ht)); | |
107 | ||
108 | /* HT is not supported */ | |
109 | if (!sband->ht_cap.ht_supported) | |
110 | enable_ht = false; | |
111 | ||
112 | /* check that channel matches the right operating channel */ | |
113 | if (local->hw.conf.channel->center_freq != | |
114 | ieee80211_channel_to_frequency(hti->control_chan)) | |
115 | enable_ht = false; | |
116 | ||
117 | if (enable_ht) { | |
118 | channel_type = NL80211_CHAN_HT20; | |
119 | ||
120 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
121 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
122 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
123 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
124 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
125 | channel_type = NL80211_CHAN_HT40PLUS; | |
126 | break; | |
127 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
128 | channel_type = NL80211_CHAN_HT40MINUS; | |
129 | break; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
135 | channel_type != local->hw.conf.channel_type; | |
136 | ||
137 | local->oper_channel_type = channel_type; | |
138 | ||
139 | if (ht_changed) { | |
140 | /* channel_type change automatically detected */ | |
141 | ieee80211_hw_config(local, 0); | |
142 | ||
143 | rcu_read_lock(); | |
144 | ||
145 | sta = sta_info_get(local, ifmgd->bssid); | |
146 | if (sta) | |
147 | rate_control_rate_update(local, sband, sta, | |
148 | IEEE80211_RC_HT_CHANGED); | |
149 | ||
150 | rcu_read_unlock(); | |
151 | ||
152 | } | |
153 | ||
154 | /* disable HT */ | |
155 | if (!enable_ht) | |
156 | return 0; | |
157 | ||
158 | ht.operation_mode = le16_to_cpu(hti->operation_mode); | |
159 | ||
160 | /* if bss configuration changed store the new one */ | |
161 | if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { | |
162 | changed |= BSS_CHANGED_HT; | |
163 | sdata->vif.bss_conf.ht = ht; | |
164 | } | |
165 | ||
166 | return changed; | |
167 | } | |
168 | ||
9c6bd790 JB |
169 | /* frame sending functions */ |
170 | ||
46900298 | 171 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 172 | { |
46900298 | 173 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
174 | struct ieee80211_local *local = sdata->local; |
175 | struct sk_buff *skb; | |
176 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 177 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
178 | int i, len, count, rates_len, supp_rates_len; |
179 | u16 capab; | |
c2b13452 | 180 | struct ieee80211_bss *bss; |
9ac19a90 JB |
181 | int wmm = 0; |
182 | struct ieee80211_supported_band *sband; | |
881d948c | 183 | u32 rates = 0; |
9ac19a90 JB |
184 | |
185 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 186 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 187 | ifmgd->ssid_len); |
9ac19a90 JB |
188 | if (!skb) { |
189 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
190 | "frame\n", sdata->dev->name); | |
191 | return; | |
192 | } | |
193 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
194 | ||
195 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
196 | ||
46900298 | 197 | capab = ifmgd->capab; |
9ac19a90 JB |
198 | |
199 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
200 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
201 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
202 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
203 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
204 | } | |
205 | ||
46900298 | 206 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 207 | local->hw.conf.channel->center_freq, |
46900298 | 208 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 209 | if (bss) { |
00d3f14c | 210 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
211 | capab |= WLAN_CAPABILITY_PRIVACY; |
212 | if (bss->wmm_used) | |
213 | wmm = 1; | |
214 | ||
215 | /* get all rates supported by the device and the AP as | |
216 | * some APs don't like getting a superset of their rates | |
217 | * in the association request (e.g. D-Link DAP 1353 in | |
218 | * b-only mode) */ | |
219 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
220 | ||
00d3f14c | 221 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
222 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
223 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
224 | ||
225 | ieee80211_rx_bss_put(local, bss); | |
226 | } else { | |
227 | rates = ~0; | |
228 | rates_len = sband->n_bitrates; | |
229 | } | |
230 | ||
231 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
232 | memset(mgmt, 0, 24); | |
46900298 | 233 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 234 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 235 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 236 | |
46900298 | 237 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
238 | skb_put(skb, 10); |
239 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
240 | IEEE80211_STYPE_REASSOC_REQ); | |
241 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
242 | mgmt->u.reassoc_req.listen_interval = | |
243 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 244 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
245 | ETH_ALEN); |
246 | } else { | |
247 | skb_put(skb, 4); | |
248 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
249 | IEEE80211_STYPE_ASSOC_REQ); | |
250 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 251 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
252 | cpu_to_le16(local->hw.conf.listen_interval); |
253 | } | |
254 | ||
255 | /* SSID */ | |
46900298 | 256 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 257 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
258 | *pos++ = ifmgd->ssid_len; |
259 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
260 | |
261 | /* add all rates which were marked to be used above */ | |
262 | supp_rates_len = rates_len; | |
263 | if (supp_rates_len > 8) | |
264 | supp_rates_len = 8; | |
265 | ||
266 | len = sband->n_bitrates; | |
267 | pos = skb_put(skb, supp_rates_len + 2); | |
268 | *pos++ = WLAN_EID_SUPP_RATES; | |
269 | *pos++ = supp_rates_len; | |
270 | ||
271 | count = 0; | |
272 | for (i = 0; i < sband->n_bitrates; i++) { | |
273 | if (BIT(i) & rates) { | |
274 | int rate = sband->bitrates[i].bitrate; | |
275 | *pos++ = (u8) (rate / 5); | |
276 | if (++count == 8) | |
277 | break; | |
278 | } | |
279 | } | |
280 | ||
281 | if (rates_len > count) { | |
282 | pos = skb_put(skb, rates_len - count + 2); | |
283 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
284 | *pos++ = rates_len - count; | |
285 | ||
286 | for (i++; i < sband->n_bitrates; i++) { | |
287 | if (BIT(i) & rates) { | |
288 | int rate = sband->bitrates[i].bitrate; | |
289 | *pos++ = (u8) (rate / 5); | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
295 | /* 1. power capabilities */ | |
296 | pos = skb_put(skb, 4); | |
297 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
298 | *pos++ = 2; | |
299 | *pos++ = 0; /* min tx power */ | |
300 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
301 | ||
302 | /* 2. supported channels */ | |
303 | /* TODO: get this in reg domain format */ | |
304 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
305 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
306 | *pos++ = 2 * sband->n_channels; | |
307 | for (i = 0; i < sband->n_channels; i++) { | |
308 | *pos++ = ieee80211_frequency_to_channel( | |
309 | sband->channels[i].center_freq); | |
310 | *pos++ = 1; /* one channel in the subband*/ | |
311 | } | |
312 | } | |
313 | ||
46900298 JB |
314 | if (ifmgd->extra_ie) { |
315 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
316 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
317 | } |
318 | ||
46900298 | 319 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
320 | pos = skb_put(skb, 9); |
321 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
322 | *pos++ = 7; /* len */ | |
323 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
324 | *pos++ = 0x50; | |
325 | *pos++ = 0xf2; | |
326 | *pos++ = 2; /* WME */ | |
327 | *pos++ = 0; /* WME info */ | |
328 | *pos++ = 1; /* WME ver */ | |
329 | *pos++ = 0; | |
330 | } | |
331 | ||
332 | /* wmm support is a must to HT */ | |
eb46936b VT |
333 | /* |
334 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
335 | * ciphers in HT mode. We still associate in non-ht | |
336 | * mode (11a/b/g) if any one of these ciphers is | |
337 | * configured as pairwise. | |
338 | */ | |
46900298 | 339 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
340 | sband->ht_cap.ht_supported && |
341 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 342 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 343 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
344 | struct ieee80211_ht_info *ht_info = |
345 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
346 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
347 | __le16 tmp; |
348 | u32 flags = local->hw.conf.channel->flags; | |
349 | ||
d9fe60de JB |
350 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
351 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 352 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 353 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
354 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
355 | } | |
356 | break; | |
d9fe60de | 357 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 358 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 359 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
360 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
361 | } | |
362 | break; | |
363 | } | |
364 | ||
365 | tmp = cpu_to_le16(cap); | |
366 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
367 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
368 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
369 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
370 | memcpy(pos, &tmp, sizeof(u16)); | |
371 | pos += sizeof(u16); | |
372 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
373 | *pos++ = sband->ht_cap.ampdu_factor | |
374 | (sband->ht_cap.ampdu_density << 2); | |
375 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
376 | } |
377 | ||
46900298 JB |
378 | kfree(ifmgd->assocreq_ies); |
379 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
380 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
381 | if (ifmgd->assocreq_ies) | |
382 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 383 | |
e50db65c | 384 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
385 | } |
386 | ||
387 | ||
ef422bc0 JB |
388 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
389 | u16 stype, u16 reason) | |
9ac19a90 JB |
390 | { |
391 | struct ieee80211_local *local = sdata->local; | |
46900298 | 392 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
393 | struct sk_buff *skb; |
394 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 395 | |
65fc73ac | 396 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 397 | if (!skb) { |
ef422bc0 JB |
398 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
399 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
400 | return; |
401 | } | |
402 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
403 | ||
404 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
405 | memset(mgmt, 0, 24); | |
46900298 | 406 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 407 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 408 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 409 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 410 | skb_put(skb, 2); |
ef422bc0 | 411 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
412 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
413 | ||
53b46b84 JM |
414 | if (stype == IEEE80211_STYPE_DEAUTH) |
415 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
416 | else | |
417 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 418 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
419 | } |
420 | ||
572e0012 KV |
421 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
422 | struct ieee80211_sub_if_data *sdata) | |
423 | { | |
46900298 | 424 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
425 | struct ieee80211_pspoll *pspoll; |
426 | struct sk_buff *skb; | |
427 | u16 fc; | |
428 | ||
429 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
430 | if (!skb) { | |
431 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
432 | "pspoll frame\n", sdata->dev->name); | |
433 | return; | |
434 | } | |
435 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
436 | ||
437 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
438 | memset(pspoll, 0, sizeof(*pspoll)); | |
439 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
440 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 441 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
442 | |
443 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
444 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
445 | ||
46900298 | 446 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
447 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
448 | ||
449 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
450 | } |
451 | ||
965bedad JB |
452 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
453 | struct ieee80211_sub_if_data *sdata, | |
454 | int powersave) | |
455 | { | |
456 | struct sk_buff *skb; | |
457 | struct ieee80211_hdr *nullfunc; | |
458 | __le16 fc; | |
459 | ||
460 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
461 | return; | |
462 | ||
463 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
464 | if (!skb) { | |
465 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
466 | "frame\n", sdata->dev->name); | |
467 | return; | |
468 | } | |
469 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
470 | ||
471 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
472 | memset(nullfunc, 0, 24); | |
473 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
474 | IEEE80211_FCTL_TODS); | |
475 | if (powersave) | |
476 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
477 | nullfunc->frame_control = fc; | |
478 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
479 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
480 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
481 | ||
482 | ieee80211_tx_skb(sdata, skb, 0); | |
483 | } | |
484 | ||
485 | /* powersave */ | |
486 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
487 | struct ieee80211_sub_if_data *sdata) | |
488 | { | |
489 | struct ieee80211_conf *conf = &local->hw.conf; | |
490 | ||
d5edaedc JB |
491 | /* |
492 | * If we are scanning right now then the parameters will | |
493 | * take effect when scan finishes. | |
494 | */ | |
495 | if (local->hw_scanning || local->sw_scanning) | |
496 | return; | |
497 | ||
965bedad JB |
498 | if (conf->dynamic_ps_timeout > 0 && |
499 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
500 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
501 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
502 | } else { | |
503 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
504 | ieee80211_send_nullfunc(local, sdata, 1); | |
505 | conf->flags |= IEEE80211_CONF_PS; | |
506 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
507 | } | |
508 | } | |
509 | ||
510 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
511 | { | |
512 | struct ieee80211_conf *conf = &local->hw.conf; | |
513 | ||
514 | if (local->ps_sdata) { | |
515 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
516 | return; | |
517 | ||
518 | ieee80211_enable_ps(local, local->ps_sdata); | |
519 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
520 | conf->flags &= ~IEEE80211_CONF_PS; | |
521 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
522 | del_timer_sync(&local->dynamic_ps_timer); | |
523 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
524 | } | |
525 | } | |
526 | ||
527 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 528 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
529 | { |
530 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
531 | int count = 0; | |
532 | ||
533 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
534 | local->ps_sdata = NULL; | |
535 | return; | |
536 | } | |
537 | ||
538 | list_for_each_entry(sdata, &local->interfaces, list) { | |
539 | if (!netif_running(sdata->dev)) | |
540 | continue; | |
541 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
542 | continue; | |
543 | found = sdata; | |
544 | count++; | |
545 | } | |
546 | ||
10f644a4 JB |
547 | if (count == 1 && found->u.mgd.powersave) { |
548 | s32 beaconint_us; | |
549 | ||
550 | if (latency < 0) | |
551 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
552 | ||
553 | beaconint_us = ieee80211_tu_to_usec( | |
554 | found->vif.bss_conf.beacon_int); | |
555 | ||
04fe2037 | 556 | if (beaconint_us > latency) { |
10f644a4 | 557 | local->ps_sdata = NULL; |
04fe2037 JB |
558 | } else { |
559 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
560 | int maxslp = 1; | |
561 | ||
562 | if (dtimper > 1) | |
563 | maxslp = min_t(int, dtimper, | |
564 | latency / beaconint_us); | |
565 | ||
9ccebe61 | 566 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 567 | local->ps_sdata = found; |
04fe2037 | 568 | } |
10f644a4 | 569 | } else { |
965bedad | 570 | local->ps_sdata = NULL; |
10f644a4 | 571 | } |
965bedad JB |
572 | |
573 | ieee80211_change_ps(local); | |
574 | } | |
575 | ||
576 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
577 | { | |
578 | struct ieee80211_local *local = | |
579 | container_of(work, struct ieee80211_local, | |
580 | dynamic_ps_disable_work); | |
581 | ||
582 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
583 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
584 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
585 | } | |
586 | ||
587 | ieee80211_wake_queues_by_reason(&local->hw, | |
588 | IEEE80211_QUEUE_STOP_REASON_PS); | |
589 | } | |
590 | ||
591 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
592 | { | |
593 | struct ieee80211_local *local = | |
594 | container_of(work, struct ieee80211_local, | |
595 | dynamic_ps_enable_work); | |
596 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
597 | ||
598 | /* can only happen when PS was just disabled anyway */ | |
599 | if (!sdata) | |
600 | return; | |
601 | ||
602 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
603 | return; | |
604 | ||
605 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
606 | ieee80211_send_nullfunc(local, sdata, 1); | |
607 | ||
608 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
609 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
610 | } | |
611 | ||
612 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
613 | { | |
614 | struct ieee80211_local *local = (void *) data; | |
615 | ||
616 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
617 | } | |
618 | ||
60f8b39c | 619 | /* MLME */ |
f698d856 | 620 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 621 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
622 | u8 *wmm_param, size_t wmm_param_len) |
623 | { | |
f0706e82 JB |
624 | struct ieee80211_tx_queue_params params; |
625 | size_t left; | |
626 | int count; | |
627 | u8 *pos; | |
628 | ||
46900298 | 629 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
630 | return; |
631 | ||
632 | if (!wmm_param) | |
633 | return; | |
634 | ||
f0706e82 JB |
635 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
636 | return; | |
637 | count = wmm_param[6] & 0x0f; | |
46900298 | 638 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 639 | return; |
46900298 | 640 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
641 | |
642 | pos = wmm_param + 8; | |
643 | left = wmm_param_len - 8; | |
644 | ||
645 | memset(¶ms, 0, sizeof(params)); | |
646 | ||
f0706e82 JB |
647 | local->wmm_acm = 0; |
648 | for (; left >= 4; left -= 4, pos += 4) { | |
649 | int aci = (pos[0] >> 5) & 0x03; | |
650 | int acm = (pos[0] >> 4) & 0x01; | |
651 | int queue; | |
652 | ||
653 | switch (aci) { | |
0eeb59fe | 654 | case 1: /* AC_BK */ |
e100bb64 | 655 | queue = 3; |
988c0f72 | 656 | if (acm) |
0eeb59fe | 657 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 658 | break; |
0eeb59fe | 659 | case 2: /* AC_VI */ |
e100bb64 | 660 | queue = 1; |
988c0f72 | 661 | if (acm) |
0eeb59fe | 662 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 663 | break; |
0eeb59fe | 664 | case 3: /* AC_VO */ |
e100bb64 | 665 | queue = 0; |
988c0f72 | 666 | if (acm) |
0eeb59fe | 667 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 668 | break; |
0eeb59fe | 669 | case 0: /* AC_BE */ |
f0706e82 | 670 | default: |
e100bb64 | 671 | queue = 2; |
988c0f72 | 672 | if (acm) |
0eeb59fe | 673 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
674 | break; |
675 | } | |
676 | ||
677 | params.aifs = pos[0] & 0x0f; | |
678 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
679 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 680 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 681 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 682 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 683 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 684 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
685 | params.cw_max, params.txop); |
686 | #endif | |
24487981 | 687 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 688 | printk(KERN_DEBUG "%s: failed to set TX queue " |
24487981 JB |
689 | "parameters for queue %d\n", local->mdev->name, |
690 | queue); | |
f0706e82 JB |
691 | } |
692 | } | |
693 | ||
7a5158ef JB |
694 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
695 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 696 | { |
bda3933a | 697 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 698 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 699 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 700 | #endif |
471b3efd | 701 | u32 changed = 0; |
7a5158ef JB |
702 | bool use_protection; |
703 | bool use_short_preamble; | |
704 | bool use_short_slot; | |
705 | ||
706 | if (erp_valid) { | |
707 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
708 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
709 | } else { | |
710 | use_protection = false; | |
711 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
712 | } | |
713 | ||
714 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 715 | |
471b3efd | 716 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 717 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 718 | if (net_ratelimit()) { |
0c68ae26 | 719 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 720 | sdata->dev->name, |
5628221c | 721 | use_protection ? "enabled" : "disabled", |
46900298 | 722 | ifmgd->bssid); |
5628221c | 723 | } |
f4ea83dd | 724 | #endif |
471b3efd JB |
725 | bss_conf->use_cts_prot = use_protection; |
726 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 727 | } |
7e9ed188 | 728 | |
d43c7b37 | 729 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 730 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
731 | if (net_ratelimit()) { |
732 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 733 | " (BSSID=%pM)\n", |
471b3efd | 734 | sdata->dev->name, |
d43c7b37 | 735 | use_short_preamble ? "short" : "long", |
46900298 | 736 | ifmgd->bssid); |
7e9ed188 | 737 | } |
f4ea83dd | 738 | #endif |
d43c7b37 | 739 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 740 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 741 | } |
d9430a32 | 742 | |
7a5158ef JB |
743 | if (use_short_slot != bss_conf->use_short_slot) { |
744 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
745 | if (net_ratelimit()) { | |
391429c1 CL |
746 | printk(KERN_DEBUG "%s: switched to %s slot time" |
747 | " (BSSID=%pM)\n", | |
7a5158ef JB |
748 | sdata->dev->name, |
749 | use_short_slot ? "short" : "long", | |
46900298 | 750 | ifmgd->bssid); |
7a5158ef JB |
751 | } |
752 | #endif | |
753 | bss_conf->use_short_slot = use_short_slot; | |
754 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
755 | } |
756 | ||
757 | return changed; | |
758 | } | |
759 | ||
46900298 | 760 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
761 | { |
762 | union iwreq_data wrqu; | |
46900298 | 763 | |
f5e5bf25 | 764 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
765 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
766 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
767 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
768 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
769 | } | |
770 | ||
46900298 | 771 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 772 | { |
46900298 | 773 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
774 | char *buf; |
775 | size_t len; | |
776 | int i; | |
f0706e82 JB |
777 | union iwreq_data wrqu; |
778 | ||
46900298 | 779 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
780 | return; |
781 | ||
46900298 JB |
782 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
783 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
784 | if (!buf) |
785 | return; | |
786 | ||
787 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 788 | if (ifmgd->assocreq_ies) { |
74af0250 | 789 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 790 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 791 | len += sprintf(buf + len, "%02x", |
46900298 | 792 | ifmgd->assocreq_ies[i]); |
74af0250 | 793 | } |
f0706e82 | 794 | } |
46900298 JB |
795 | if (ifmgd->assocresp_ies) { |
796 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
797 | len += sprintf(buf + len, " "); |
798 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 799 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 800 | len += sprintf(buf + len, "%02x", |
46900298 | 801 | ifmgd->assocresp_ies[i]); |
74af0250 | 802 | } |
f0706e82 | 803 | } |
74af0250 LT |
804 | len += sprintf(buf + len, ")"); |
805 | ||
806 | if (len > IW_CUSTOM_MAX) { | |
807 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 808 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 809 | len += sprintf(buf + len, "%02x", |
46900298 | 810 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
811 | } |
812 | } | |
813 | ||
ad788b5e JL |
814 | if (len <= IW_CUSTOM_MAX) { |
815 | memset(&wrqu, 0, sizeof(wrqu)); | |
816 | wrqu.data.length = len; | |
817 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
818 | } | |
74af0250 LT |
819 | |
820 | kfree(buf); | |
f0706e82 JB |
821 | } |
822 | ||
823 | ||
f698d856 | 824 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 825 | u32 bss_info_changed) |
f0706e82 | 826 | { |
46900298 | 827 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 828 | struct ieee80211_local *local = sdata->local; |
38668c05 | 829 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 830 | |
c2b13452 | 831 | struct ieee80211_bss *bss; |
d6f2da5b | 832 | |
ae5eb026 | 833 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 834 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 835 | |
46900298 | 836 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 837 | conf->channel->center_freq, |
46900298 | 838 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
839 | if (bss) { |
840 | /* set timing information */ | |
00d3f14c JB |
841 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
842 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 843 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 844 | |
57c4d7b4 | 845 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 846 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 847 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 848 | |
04de8381 KV |
849 | cfg80211_hold_bss(&bss->cbss); |
850 | ||
9ac19a90 | 851 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
852 | } |
853 | ||
46900298 JB |
854 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
855 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
856 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 857 | |
46900298 | 858 | ifmgd->last_probe = jiffies; |
9ac19a90 | 859 | ieee80211_led_assoc(local, 1); |
9306102e | 860 | |
bda3933a | 861 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
862 | /* |
863 | * For now just always ask the driver to update the basic rateset | |
864 | * when we have associated, we aren't checking whether it actually | |
865 | * changed or not. | |
866 | */ | |
ae5eb026 JB |
867 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
868 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 869 | |
965bedad | 870 | /* will be same as sdata */ |
04fe2037 JB |
871 | if (local->ps_sdata) { |
872 | mutex_lock(&local->iflist_mtx); | |
873 | ieee80211_recalc_ps(local, -1); | |
874 | mutex_unlock(&local->iflist_mtx); | |
875 | } | |
e0cb686f | 876 | |
9ac19a90 JB |
877 | netif_tx_start_all_queues(sdata->dev); |
878 | netif_carrier_on(sdata->dev); | |
f0706e82 | 879 | |
46900298 | 880 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
881 | } |
882 | ||
46900298 | 883 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 884 | { |
46900298 | 885 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 886 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
887 | |
888 | ifmgd->direct_probe_tries++; | |
889 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 890 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
891 | sdata->dev->name, ifmgd->bssid); |
892 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
893 | ieee80211_sta_send_apinfo(sdata); | |
7a947080 VT |
894 | |
895 | /* | |
896 | * Most likely AP is not in the range so remove the | |
897 | * bss information associated to the AP | |
898 | */ | |
46900298 | 899 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 900 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 901 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
902 | |
903 | /* | |
904 | * We might have a pending scan which had no chance to run yet | |
905 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
906 | * Hence, queue the STAs work again | |
907 | */ | |
908 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
909 | return; |
910 | } | |
f0706e82 | 911 | |
0c68ae26 | 912 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
913 | sdata->dev->name, ifmgd->bssid, |
914 | ifmgd->direct_probe_tries); | |
f0706e82 | 915 | |
46900298 | 916 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 917 | |
46900298 | 918 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); |
9ac19a90 JB |
919 | |
920 | /* Direct probe is sent to broadcast address as some APs | |
921 | * will not answer to direct packet in unassociated state. | |
922 | */ | |
923 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 924 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 925 | |
46900298 | 926 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 927 | } |
f0706e82 | 928 | |
9ac19a90 | 929 | |
46900298 | 930 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 931 | { |
46900298 | 932 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 933 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
934 | u8 *ies; |
935 | size_t ies_len; | |
46900298 JB |
936 | |
937 | ifmgd->auth_tries++; | |
938 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 939 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 940 | " timed out\n", |
46900298 JB |
941 | sdata->dev->name, ifmgd->bssid); |
942 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1965c853 | 943 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 944 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 945 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 946 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
947 | |
948 | /* | |
949 | * We might have a pending scan which had no chance to run yet | |
950 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
951 | * Hence, queue the STAs work again | |
952 | */ | |
953 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
954 | return; |
955 | } | |
f0706e82 | 956 | |
46900298 | 957 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 958 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 959 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 960 | |
636a5d36 JM |
961 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
962 | ies = ifmgd->sme_auth_ie; | |
963 | ies_len = ifmgd->sme_auth_ie_len; | |
964 | } else { | |
965 | ies = NULL; | |
966 | ies_len = 0; | |
967 | } | |
968 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
969 | ifmgd->bssid, 0); |
970 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 971 | |
46900298 | 972 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
973 | } |
974 | ||
5925d976 VN |
975 | /* |
976 | * The disassoc 'reason' argument can be either our own reason | |
977 | * if self disconnected or a reason code from the AP. | |
978 | */ | |
aa458d17 | 979 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
980 | bool deauth, bool self_disconnected, |
981 | u16 reason) | |
aa458d17 | 982 | { |
46900298 | 983 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 984 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
985 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
986 | struct ieee80211_bss *bss; | |
aa458d17 | 987 | struct sta_info *sta; |
e0cb686f | 988 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
989 | |
990 | rcu_read_lock(); | |
991 | ||
46900298 | 992 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
993 | if (!sta) { |
994 | rcu_read_unlock(); | |
995 | return; | |
996 | } | |
997 | ||
998 | if (deauth) { | |
46900298 JB |
999 | ifmgd->direct_probe_tries = 0; |
1000 | ifmgd->auth_tries = 0; | |
aa458d17 | 1001 | } |
46900298 JB |
1002 | ifmgd->assoc_scan_tries = 0; |
1003 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1004 | |
24e64622 | 1005 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1006 | netif_carrier_off(sdata->dev); |
1007 | ||
2dace10e | 1008 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1009 | |
04de8381 KV |
1010 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1011 | conf->channel->center_freq, | |
1012 | ifmgd->ssid, ifmgd->ssid_len); | |
1013 | ||
1014 | if (bss) { | |
1015 | cfg80211_unhold_bss(&bss->cbss); | |
1016 | ieee80211_rx_bss_put(local, bss); | |
1017 | } | |
1018 | ||
aa458d17 TW |
1019 | if (self_disconnected) { |
1020 | if (deauth) | |
ef422bc0 JB |
1021 | ieee80211_send_deauth_disassoc(sdata, |
1022 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1023 | else |
ef422bc0 JB |
1024 | ieee80211_send_deauth_disassoc(sdata, |
1025 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1026 | } |
1027 | ||
46900298 | 1028 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1029 | changed |= ieee80211_reset_erp_info(sdata); |
1030 | ||
f5e5bf25 | 1031 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1032 | changed |= BSS_CHANGED_ASSOC; |
1033 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1034 | |
46900298 | 1035 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1036 | |
7a947080 | 1037 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1038 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1039 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1040 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1041 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1042 | } |
aa458d17 | 1043 | |
aa458d17 TW |
1044 | rcu_read_unlock(); |
1045 | ||
4797938c | 1046 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1047 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1048 | |
a8302de9 VT |
1049 | local->power_constr_level = 0; |
1050 | ||
520eb820 KV |
1051 | del_timer_sync(&local->dynamic_ps_timer); |
1052 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1053 | ||
e0cb686f KV |
1054 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1055 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1056 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1057 | } | |
ae5eb026 | 1058 | |
e0cb686f | 1059 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1060 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1061 | |
1062 | rcu_read_lock(); | |
1063 | ||
46900298 | 1064 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1065 | if (!sta) { |
1066 | rcu_read_unlock(); | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | sta_info_unlink(&sta); | |
1071 | ||
1072 | rcu_read_unlock(); | |
1073 | ||
1074 | sta_info_destroy(sta); | |
aa458d17 | 1075 | } |
f0706e82 | 1076 | |
9ac19a90 JB |
1077 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1078 | { | |
1079 | if (!sdata || !sdata->default_key || | |
1080 | sdata->default_key->conf.alg != ALG_WEP) | |
1081 | return 0; | |
1082 | return 1; | |
1083 | } | |
1084 | ||
46900298 | 1085 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1086 | { |
46900298 | 1087 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1088 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1089 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1090 | int bss_privacy; |
1091 | int wep_privacy; | |
1092 | int privacy_invoked; | |
f0706e82 | 1093 | |
7986cf95 | 1094 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1095 | return 0; |
1096 | ||
46900298 | 1097 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1098 | local->hw.conf.channel->center_freq, |
46900298 | 1099 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1100 | if (!bss) |
1101 | return 0; | |
1102 | ||
00d3f14c | 1103 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1104 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1105 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1106 | |
3e122be0 | 1107 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1108 | |
5b98b1f7 JB |
1109 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1110 | return 0; | |
1111 | ||
1112 | return 1; | |
f0706e82 JB |
1113 | } |
1114 | ||
46900298 | 1115 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1116 | { |
46900298 | 1117 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1118 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1119 | |
1120 | ifmgd->assoc_tries++; | |
1121 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1122 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1123 | " timed out\n", |
46900298 JB |
1124 | sdata->dev->name, ifmgd->bssid); |
1125 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1965c853 | 1126 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1127 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1128 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1129 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1130 | /* |
1131 | * We might have a pending scan which had no chance to run yet | |
1132 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1133 | * Hence, queue the STAs work again | |
1134 | */ | |
1135 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1136 | return; |
1137 | } | |
1138 | ||
46900298 | 1139 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1140 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1141 | sdata->dev->name, ifmgd->bssid); |
1142 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1143 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1144 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1145 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1146 | return; |
1147 | } | |
1148 | ||
46900298 | 1149 | ieee80211_send_assoc(sdata); |
f0706e82 | 1150 | |
46900298 | 1151 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1152 | } |
1153 | ||
3cf335d5 KV |
1154 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1155 | struct ieee80211_hdr *hdr) | |
1156 | { | |
1157 | /* | |
1158 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1159 | * from AP because we know that the connection is working both ways | |
1160 | * at that time. But multicast frames (and hence also beacons) must | |
1161 | * be ignored here, because we need to trigger the timer during | |
1162 | * data idle periods for sending the periodical probe request to | |
1163 | * the AP. | |
1164 | */ | |
1165 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1166 | mod_timer(&sdata->u.mgd.timer, | |
1167 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1168 | } | |
f0706e82 | 1169 | |
04de8381 KV |
1170 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1171 | { | |
1172 | struct ieee80211_sub_if_data *sdata = | |
1173 | container_of(work, struct ieee80211_sub_if_data, | |
1174 | u.mgd.beacon_loss_work); | |
1175 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1176 | ||
a860402d MB |
1177 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1178 | if (net_ratelimit()) { | |
1179 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1180 | "- sending probe request\n", sdata->dev->name, | |
1181 | sdata->u.mgd.bssid); | |
1182 | } | |
1183 | #endif | |
04de8381 KV |
1184 | |
1185 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1186 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1187 | ifmgd->ssid_len, NULL, 0); | |
1188 | ||
1189 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL); | |
1190 | } | |
1191 | ||
1192 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1193 | { | |
1194 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1195 | ||
1196 | queue_work(sdata->local->hw.workqueue, | |
1197 | &sdata->u.mgd.beacon_loss_work); | |
1198 | } | |
1199 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1200 | ||
46900298 | 1201 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1202 | { |
46900298 | 1203 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1204 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1205 | struct sta_info *sta; |
15b7b062 | 1206 | bool disassoc = false; |
f0706e82 JB |
1207 | |
1208 | /* TODO: start monitoring current AP signal quality and number of | |
1209 | * missed beacons. Scan other channels every now and then and search | |
1210 | * for better APs. */ | |
1211 | /* TODO: remove expired BSSes */ | |
1212 | ||
46900298 | 1213 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1214 | |
d0709a65 JB |
1215 | rcu_read_lock(); |
1216 | ||
46900298 | 1217 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1218 | if (!sta) { |
0c68ae26 | 1219 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1220 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1221 | disassoc = true; |
1222 | goto unlock; | |
1223 | } | |
1224 | ||
1225 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
1226 | time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
1227 | printk(KERN_DEBUG "%s: no probe response from AP %pM " | |
1228 | "- disassociating\n", | |
1229 | sdata->dev->name, ifmgd->bssid); | |
1230 | disassoc = true; | |
1231 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1232 | goto unlock; | |
1233 | } | |
1234 | ||
04de8381 KV |
1235 | /* |
1236 | * Beacon filtering is only enabled with power save and then the | |
1237 | * stack should not check for beacon loss. | |
1238 | */ | |
1239 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1240 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1241 | time_after(jiffies, | |
15b7b062 | 1242 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1243 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1244 | if (net_ratelimit()) { | |
1245 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1246 | "- sending probe request\n", | |
1247 | sdata->dev->name, ifmgd->bssid); | |
1248 | } | |
1249 | #endif | |
15b7b062 KV |
1250 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1251 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1252 | ifmgd->ssid_len, NULL, 0); | |
1253 | goto unlock; | |
1254 | ||
1255 | } | |
1256 | ||
1257 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1258 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1259 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1260 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1261 | } |
d0709a65 | 1262 | |
15b7b062 | 1263 | unlock: |
d0709a65 JB |
1264 | rcu_read_unlock(); |
1265 | ||
7a947080 | 1266 | if (disassoc) |
46900298 | 1267 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1268 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1269 | else |
46900298 | 1270 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1271 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1272 | } |
1273 | ||
1274 | ||
46900298 | 1275 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1276 | { |
46900298 JB |
1277 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1278 | ||
f698d856 | 1279 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1280 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1281 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1282 | /* Wait for SME to request association */ | |
1283 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1284 | } else | |
1285 | ieee80211_associate(sdata); | |
f0706e82 JB |
1286 | } |
1287 | ||
1288 | ||
f698d856 | 1289 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1290 | struct ieee80211_mgmt *mgmt, |
1291 | size_t len) | |
1292 | { | |
1293 | u8 *pos; | |
1294 | struct ieee802_11_elems elems; | |
1295 | ||
f0706e82 | 1296 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1297 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1298 | if (!elems.challenge) |
f0706e82 | 1299 | return; |
46900298 JB |
1300 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1301 | elems.challenge - 2, elems.challenge_len + 2, | |
1302 | sdata->u.mgd.bssid, 1); | |
1303 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1304 | } |
1305 | ||
f698d856 | 1306 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1307 | struct ieee80211_mgmt *mgmt, |
1308 | size_t len) | |
1309 | { | |
46900298 | 1310 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1311 | u16 auth_alg, auth_transaction, status_code; |
1312 | ||
46900298 | 1313 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1314 | return; |
f0706e82 | 1315 | |
f4ea83dd | 1316 | if (len < 24 + 6) |
f0706e82 | 1317 | return; |
f0706e82 | 1318 | |
46900298 | 1319 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1320 | return; |
f0706e82 | 1321 | |
46900298 | 1322 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1323 | return; |
f0706e82 JB |
1324 | |
1325 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1326 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1327 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1328 | ||
46900298 JB |
1329 | if (auth_alg != ifmgd->auth_alg || |
1330 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1331 | return; |
f0706e82 JB |
1332 | |
1333 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1334 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1335 | u8 algs[3]; | |
1336 | const int num_algs = ARRAY_SIZE(algs); | |
1337 | int i, pos; | |
1338 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1339 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1340 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1341 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1342 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1343 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1344 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1345 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1346 | pos = 0; |
46900298 | 1347 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1348 | pos = 1; |
1349 | else | |
1350 | pos = 2; | |
1351 | for (i = 0; i < num_algs; i++) { | |
1352 | pos++; | |
1353 | if (pos >= num_algs) | |
1354 | pos = 0; | |
46900298 | 1355 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1356 | algs[pos] == 0xff) |
1357 | continue; | |
1358 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1359 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1360 | continue; |
46900298 | 1361 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1362 | break; |
1363 | } | |
1364 | } | |
1365 | return; | |
1366 | } | |
1367 | ||
46900298 | 1368 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1369 | case WLAN_AUTH_OPEN: |
1370 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1371 | case WLAN_AUTH_FT: |
46900298 | 1372 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1373 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1374 | break; |
1375 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1376 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1377 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1378 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1379 | } else | |
46900298 | 1380 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1381 | break; |
1382 | } | |
1383 | } | |
1384 | ||
1385 | ||
f698d856 | 1386 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1387 | struct ieee80211_mgmt *mgmt, |
1388 | size_t len) | |
1389 | { | |
46900298 | 1390 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1391 | u16 reason_code; |
1392 | ||
f4ea83dd | 1393 | if (len < 24 + 2) |
f0706e82 | 1394 | return; |
f0706e82 | 1395 | |
46900298 | 1396 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1397 | return; |
f0706e82 JB |
1398 | |
1399 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1400 | ||
46900298 | 1401 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1402 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1403 | sdata->dev->name, reason_code); | |
f0706e82 | 1404 | |
636a5d36 JM |
1405 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1406 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1407 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1408 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1409 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1410 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1411 | IEEE80211_RETRY_AUTH_INTERVAL); |
1412 | } | |
1413 | ||
46900298 JB |
1414 | ieee80211_set_disassoc(sdata, true, false, 0); |
1415 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1416 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1417 | } |
1418 | ||
1419 | ||
f698d856 | 1420 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1421 | struct ieee80211_mgmt *mgmt, |
1422 | size_t len) | |
1423 | { | |
46900298 | 1424 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1425 | u16 reason_code; |
1426 | ||
f4ea83dd | 1427 | if (len < 24 + 2) |
f0706e82 | 1428 | return; |
f0706e82 | 1429 | |
46900298 | 1430 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1431 | return; |
f0706e82 JB |
1432 | |
1433 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1434 | ||
46900298 | 1435 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1436 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1437 | sdata->dev->name, reason_code); | |
f0706e82 | 1438 | |
636a5d36 JM |
1439 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1440 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1441 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1442 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1443 | IEEE80211_RETRY_AUTH_INTERVAL); |
1444 | } | |
1445 | ||
46900298 | 1446 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1447 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1448 | } |
1449 | ||
1450 | ||
471b3efd | 1451 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1452 | struct ieee80211_mgmt *mgmt, |
1453 | size_t len, | |
1454 | int reassoc) | |
1455 | { | |
46900298 | 1456 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1457 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1458 | struct ieee80211_supported_band *sband; |
f0706e82 | 1459 | struct sta_info *sta; |
881d948c | 1460 | u32 rates, basic_rates; |
f0706e82 JB |
1461 | u16 capab_info, status_code, aid; |
1462 | struct ieee802_11_elems elems; | |
bda3933a | 1463 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1464 | u8 *pos; |
ae5eb026 | 1465 | u32 changed = 0; |
f0706e82 | 1466 | int i, j; |
ddf4ac53 | 1467 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1468 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1469 | |
1470 | /* AssocResp and ReassocResp have identical structure, so process both | |
1471 | * of them in this function. */ | |
1472 | ||
46900298 | 1473 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1474 | return; |
f0706e82 | 1475 | |
f4ea83dd | 1476 | if (len < 24 + 6) |
f0706e82 | 1477 | return; |
f0706e82 | 1478 | |
46900298 | 1479 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1480 | return; |
f0706e82 JB |
1481 | |
1482 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1483 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1484 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1485 | |
0c68ae26 | 1486 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1487 | "status=%d aid=%d)\n", |
0c68ae26 | 1488 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1489 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1490 | |
63a5ab82 JM |
1491 | pos = mgmt->u.assoc_resp.variable; |
1492 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1493 | ||
1494 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1495 | elems.timeout_int && elems.timeout_int_len == 5 && |
1496 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1497 | u32 tu, ms; |
f797eb7e | 1498 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1499 | ms = tu * 1024 / 1000; |
1500 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1501 | "comeback duration %u TU (%u ms)\n", | |
1502 | sdata->dev->name, tu, ms); | |
1503 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1504 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1505 | jiffies + msecs_to_jiffies(ms)); |
1506 | return; | |
1507 | } | |
1508 | ||
f0706e82 JB |
1509 | if (status_code != WLAN_STATUS_SUCCESS) { |
1510 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1511 | sdata->dev->name, status_code); |
8a69aa93 DD |
1512 | /* if this was a reassociation, ensure we try a "full" |
1513 | * association next time. This works around some broken APs | |
1514 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1515 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1516 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1517 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1518 | /* Wait for SME to decide what to do next */ | |
1519 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1520 | } | |
f0706e82 JB |
1521 | return; |
1522 | } | |
1523 | ||
1dd84aa2 JB |
1524 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1525 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1526 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1527 | aid &= ~(BIT(15) | BIT(14)); |
1528 | ||
f0706e82 JB |
1529 | if (!elems.supp_rates) { |
1530 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1531 | sdata->dev->name); |
f0706e82 JB |
1532 | return; |
1533 | } | |
1534 | ||
f698d856 | 1535 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1536 | ifmgd->aid = aid; |
1537 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1538 | |
46900298 JB |
1539 | kfree(ifmgd->assocresp_ies); |
1540 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1541 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1542 | if (ifmgd->assocresp_ies) | |
1543 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1544 | |
d0709a65 JB |
1545 | rcu_read_lock(); |
1546 | ||
f0706e82 | 1547 | /* Add STA entry for the AP */ |
46900298 | 1548 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1549 | if (!sta) { |
ddf4ac53 | 1550 | newsta = true; |
d0709a65 | 1551 | |
46900298 | 1552 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1553 | if (!sta) { |
1554 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1555 | " the AP\n", sdata->dev->name); |
d0709a65 | 1556 | rcu_read_unlock(); |
f0706e82 JB |
1557 | return; |
1558 | } | |
f709fc69 | 1559 | |
60f8b39c JB |
1560 | /* update new sta with its last rx activity */ |
1561 | sta->last_rx = jiffies; | |
f709fc69 | 1562 | } |
f709fc69 | 1563 | |
60f8b39c JB |
1564 | /* |
1565 | * FIXME: Do we really need to update the sta_info's information here? | |
1566 | * We already know about the AP (we found it in our list) so it | |
1567 | * should already be filled with the right info, no? | |
1568 | * As is stands, all this is racy because typically we assume | |
1569 | * the information that is filled in here (except flags) doesn't | |
1570 | * change while a STA structure is alive. As such, it should move | |
1571 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1572 | */ | |
f709fc69 | 1573 | |
60f8b39c JB |
1574 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1575 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1576 | |
60f8b39c JB |
1577 | rates = 0; |
1578 | basic_rates = 0; | |
1579 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1580 | |
60f8b39c JB |
1581 | for (i = 0; i < elems.supp_rates_len; i++) { |
1582 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1583 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1584 | |
60f8b39c JB |
1585 | if (rate > 110) |
1586 | have_higher_than_11mbit = true; | |
1587 | ||
1588 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1589 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1590 | rates |= BIT(j); |
d61272cb TW |
1591 | if (is_basic) |
1592 | basic_rates |= BIT(j); | |
1593 | break; | |
1594 | } | |
f709fc69 | 1595 | } |
f709fc69 LCC |
1596 | } |
1597 | ||
60f8b39c JB |
1598 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1599 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1600 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1601 | |
60f8b39c JB |
1602 | if (rate > 110) |
1603 | have_higher_than_11mbit = true; | |
f0706e82 | 1604 | |
60f8b39c | 1605 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1606 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1607 | rates |= BIT(j); |
d61272cb TW |
1608 | if (is_basic) |
1609 | basic_rates |= BIT(j); | |
1610 | break; | |
1611 | } | |
60f8b39c | 1612 | } |
1ebebea8 | 1613 | } |
f0706e82 | 1614 | |
323ce79a | 1615 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1616 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1617 | |
1618 | /* cf. IEEE 802.11 9.2.12 */ | |
1619 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1620 | have_higher_than_11mbit) | |
1621 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1622 | else | |
1623 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1624 | |
e65c2263 S |
1625 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1626 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1627 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1628 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1629 | |
1630 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1631 | |
4b7679a5 | 1632 | rate_control_rate_init(sta); |
f0706e82 | 1633 | |
46900298 | 1634 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1635 | set_sta_flags(sta, WLAN_STA_MFP); |
1636 | ||
ddf4ac53 | 1637 | if (elems.wmm_param) |
60f8b39c | 1638 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1639 | |
1640 | if (newsta) { | |
1641 | int err = sta_info_insert(sta); | |
1642 | if (err) { | |
1643 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1644 | " the AP (error %d)\n", sdata->dev->name, err); | |
1645 | rcu_read_unlock(); | |
1646 | return; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | rcu_read_unlock(); | |
1651 | ||
1652 | if (elems.wmm_param) | |
46900298 | 1653 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1654 | elems.wmm_param_len); |
f0706e82 | 1655 | |
ae5eb026 | 1656 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1657 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1658 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1659 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1660 | ap_ht_cap_flags); | |
1661 | ||
60f8b39c JB |
1662 | /* set AID and assoc capability, |
1663 | * ieee80211_set_associated() will tell the driver */ | |
1664 | bss_conf->aid = aid; | |
1665 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1666 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1667 | |
15b7b062 KV |
1668 | /* |
1669 | * initialise the time of last beacon to be the association time, | |
1670 | * otherwise beacon loss check will trigger immediately | |
1671 | */ | |
1672 | ifmgd->last_beacon = jiffies; | |
1673 | ||
46900298 | 1674 | ieee80211_associated(sdata); |
6039f6d2 | 1675 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1676 | } |
1677 | ||
1678 | ||
98c8fccf JB |
1679 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1680 | struct ieee80211_mgmt *mgmt, | |
1681 | size_t len, | |
1682 | struct ieee80211_rx_status *rx_status, | |
1683 | struct ieee802_11_elems *elems, | |
1684 | bool beacon) | |
1685 | { | |
1686 | struct ieee80211_local *local = sdata->local; | |
1687 | int freq; | |
c2b13452 | 1688 | struct ieee80211_bss *bss; |
98c8fccf | 1689 | struct ieee80211_channel *channel; |
98c8fccf JB |
1690 | |
1691 | if (elems->ds_params && elems->ds_params_len == 1) | |
1692 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1693 | else | |
1694 | freq = rx_status->freq; | |
1695 | ||
1696 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1697 | ||
1698 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1699 | return; | |
1700 | ||
98c8fccf | 1701 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1702 | channel, beacon); |
98c8fccf JB |
1703 | if (!bss) |
1704 | return; | |
1705 | ||
c481ec97 | 1706 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1707 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1708 | struct ieee80211_channel_sw_ie *sw_elem = |
1709 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1710 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1711 | } | |
1712 | ||
3e122be0 | 1713 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1714 | } |
1715 | ||
1716 | ||
f698d856 | 1717 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1718 | struct ieee80211_mgmt *mgmt, |
1719 | size_t len, | |
1720 | struct ieee80211_rx_status *rx_status) | |
1721 | { | |
15b7b062 | 1722 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1723 | size_t baselen; |
1724 | struct ieee802_11_elems elems; | |
1725 | ||
15b7b062 KV |
1726 | ifmgd = &sdata->u.mgd; |
1727 | ||
8e7cdbb6 TW |
1728 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1729 | return; /* ignore ProbeResp to foreign address */ | |
1730 | ||
ae6a44e3 EK |
1731 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1732 | if (baselen > len) | |
1733 | return; | |
1734 | ||
1735 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1736 | &elems); | |
1737 | ||
98c8fccf | 1738 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1739 | |
1740 | /* direct probe may be part of the association flow */ | |
1741 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
15b7b062 | 1742 | &ifmgd->request)) { |
9859b81e RR |
1743 | printk(KERN_DEBUG "%s direct probe responded\n", |
1744 | sdata->dev->name); | |
46900298 | 1745 | ieee80211_authenticate(sdata); |
9859b81e | 1746 | } |
15b7b062 KV |
1747 | |
1748 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1749 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1750 | } |
1751 | ||
d91f36db JB |
1752 | /* |
1753 | * This is the canonical list of information elements we care about, | |
1754 | * the filter code also gives us all changes to the Microsoft OUI | |
1755 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1756 | * | |
1757 | * We implement beacon filtering in software since that means we can | |
1758 | * avoid processing the frame here and in cfg80211, and userspace | |
1759 | * will not be able to tell whether the hardware supports it or not. | |
1760 | * | |
1761 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1762 | * add items it requires. It also needs to be able to tell us to | |
1763 | * look out for other vendor IEs. | |
1764 | */ | |
1765 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1766 | (1ULL << WLAN_EID_COUNTRY) | |
1767 | (1ULL << WLAN_EID_ERP_INFO) | | |
1768 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1769 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1770 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1771 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1772 | |
f698d856 | 1773 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1774 | struct ieee80211_mgmt *mgmt, |
1775 | size_t len, | |
1776 | struct ieee80211_rx_status *rx_status) | |
1777 | { | |
d91f36db | 1778 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1779 | size_t baselen; |
1780 | struct ieee802_11_elems elems; | |
f698d856 | 1781 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1782 | u32 changed = 0; |
d91f36db | 1783 | bool erp_valid, directed_tim = false; |
7a5158ef | 1784 | u8 erp_value = 0; |
d91f36db | 1785 | u32 ncrc; |
f0706e82 | 1786 | |
ae6a44e3 EK |
1787 | /* Process beacon from the current BSS */ |
1788 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1789 | if (baselen > len) | |
1790 | return; | |
1791 | ||
d91f36db | 1792 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1793 | return; |
f0706e82 | 1794 | |
46900298 JB |
1795 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1796 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1797 | return; |
1798 | ||
d91f36db JB |
1799 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1800 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1801 | len - baselen, &elems, | |
1802 | care_about_ies, ncrc); | |
1803 | ||
1804 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1805 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1806 | ifmgd->aid); | |
d91f36db JB |
1807 | |
1808 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1809 | ||
1810 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1811 | return; |
d91f36db JB |
1812 | ifmgd->beacon_crc = ncrc; |
1813 | ||
1814 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1815 | |
46900298 | 1816 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1817 | elems.wmm_param_len); |
1818 | ||
25c9c875 | 1819 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1820 | if (directed_tim) { |
572e0012 KV |
1821 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1822 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1823 | ieee80211_hw_config(local, | |
1824 | IEEE80211_CONF_CHANGE_PS); | |
1825 | ieee80211_send_nullfunc(local, sdata, 0); | |
1826 | } else { | |
1827 | local->pspolling = true; | |
1828 | ||
1829 | /* | |
1830 | * Here is assumed that the driver will be | |
1831 | * able to send ps-poll frame and receive a | |
1832 | * response even though power save mode is | |
1833 | * enabled, but some drivers might require | |
1834 | * to disable power save here. This needs | |
1835 | * to be investigated. | |
1836 | */ | |
1837 | ieee80211_send_pspoll(local, sdata); | |
1838 | } | |
a97b77b9 VN |
1839 | } |
1840 | } | |
7a5158ef JB |
1841 | |
1842 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1843 | erp_valid = true; | |
1844 | erp_value = elems.erp_info[0]; | |
1845 | } else { | |
1846 | erp_valid = false; | |
50c4afb9 | 1847 | } |
7a5158ef JB |
1848 | changed |= ieee80211_handle_bss_capability(sdata, |
1849 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1850 | erp_valid, erp_value); | |
f0706e82 | 1851 | |
d3c990fb | 1852 | |
53d6f81c | 1853 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1854 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1855 | struct sta_info *sta; |
1856 | struct ieee80211_supported_band *sband; | |
1857 | u16 ap_ht_cap_flags; | |
1858 | ||
1859 | rcu_read_lock(); | |
1860 | ||
46900298 | 1861 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1862 | if (!sta) { |
1863 | rcu_read_unlock(); | |
1864 | return; | |
1865 | } | |
1866 | ||
1867 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1868 | ||
1869 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1870 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1871 | ||
1872 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1873 | ||
1874 | rcu_read_unlock(); | |
1875 | ||
1876 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1877 | ap_ht_cap_flags); | |
d3c990fb RR |
1878 | } |
1879 | ||
3f2355cb LR |
1880 | if (elems.country_elem) { |
1881 | /* Note we are only reviewing this on beacons | |
1882 | * for the BSSID we are associated to */ | |
1883 | regulatory_hint_11d(local->hw.wiphy, | |
1884 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1885 | |
1886 | /* TODO: IBSS also needs this */ | |
1887 | if (elems.pwr_constr_elem) | |
1888 | ieee80211_handle_pwr_constr(sdata, | |
1889 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1890 | elems.pwr_constr_elem, | |
1891 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1892 | } |
1893 | ||
471b3efd | 1894 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1895 | } |
1896 | ||
46900298 JB |
1897 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1898 | struct sk_buff *skb, | |
1899 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1900 | { |
f698d856 | 1901 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1902 | struct ieee80211_mgmt *mgmt; |
1903 | u16 fc; | |
1904 | ||
1905 | if (skb->len < 24) | |
46900298 | 1906 | return RX_DROP_MONITOR; |
f0706e82 JB |
1907 | |
1908 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1909 | fc = le16_to_cpu(mgmt->frame_control); | |
1910 | ||
1911 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1912 | case IEEE80211_STYPE_PROBE_REQ: | |
1913 | case IEEE80211_STYPE_PROBE_RESP: | |
1914 | case IEEE80211_STYPE_BEACON: | |
1915 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1916 | case IEEE80211_STYPE_AUTH: | |
1917 | case IEEE80211_STYPE_ASSOC_RESP: | |
1918 | case IEEE80211_STYPE_REASSOC_RESP: | |
1919 | case IEEE80211_STYPE_DEAUTH: | |
1920 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1921 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1922 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1923 | return RX_QUEUED; | |
f0706e82 JB |
1924 | } |
1925 | ||
46900298 | 1926 | return RX_DROP_MONITOR; |
f0706e82 JB |
1927 | } |
1928 | ||
f698d856 | 1929 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1930 | struct sk_buff *skb) |
1931 | { | |
1932 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1933 | struct ieee80211_mgmt *mgmt; |
1934 | u16 fc; | |
1935 | ||
f0706e82 JB |
1936 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1937 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1938 | fc = le16_to_cpu(mgmt->frame_control); | |
1939 | ||
46900298 JB |
1940 | switch (fc & IEEE80211_FCTL_STYPE) { |
1941 | case IEEE80211_STYPE_PROBE_RESP: | |
1942 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1943 | rx_status); | |
1944 | break; | |
1945 | case IEEE80211_STYPE_BEACON: | |
1946 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1947 | rx_status); | |
1948 | break; | |
1949 | case IEEE80211_STYPE_AUTH: | |
1950 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1951 | break; | |
1952 | case IEEE80211_STYPE_ASSOC_RESP: | |
1953 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1954 | break; | |
1955 | case IEEE80211_STYPE_REASSOC_RESP: | |
1956 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1957 | break; | |
1958 | case IEEE80211_STYPE_DEAUTH: | |
1959 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1960 | break; | |
1961 | case IEEE80211_STYPE_DISASSOC: | |
1962 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1963 | break; | |
f0706e82 JB |
1964 | } |
1965 | ||
1966 | kfree_skb(skb); | |
1967 | } | |
1968 | ||
9c6bd790 | 1969 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1970 | { |
60f8b39c JB |
1971 | struct ieee80211_sub_if_data *sdata = |
1972 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1973 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1974 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1975 | |
46900298 JB |
1976 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1977 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1978 | } |
1979 | ||
46900298 | 1980 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1981 | { |
46900298 | 1982 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1983 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1984 | |
24487981 JB |
1985 | /* Reset own TSF to allow time synchronization work. */ |
1986 | drv_reset_tsf(local); | |
f0706e82 | 1987 | |
46900298 | 1988 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1989 | |
1990 | ||
46900298 JB |
1991 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1992 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1993 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1994 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1995 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1996 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
1997 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
1998 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 1999 | else |
46900298 JB |
2000 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
2001 | ifmgd->auth_transaction = -1; | |
2002 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2003 | ifmgd->assoc_scan_tries = 0; | |
2004 | ifmgd->direct_probe_tries = 0; | |
2005 | ifmgd->auth_tries = 0; | |
2006 | ifmgd->assoc_tries = 0; | |
24e64622 | 2007 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2008 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2009 | } |
2010 | ||
46900298 | 2011 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2012 | { |
46900298 | 2013 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2014 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2015 | struct ieee80211_bss *bss; |
46900298 JB |
2016 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2017 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2018 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2019 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2020 | struct ieee80211_channel *chan = local->oper_channel; | |
2021 | ||
636a5d36 JM |
2022 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2023 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2024 | IEEE80211_STA_AUTO_BSSID_SEL | |
2025 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2026 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2027 | if (sdata->default_key) | |
2028 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2029 | } |
9d139c81 | 2030 | |
46900298 | 2031 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2032 | chan = NULL; |
2033 | ||
46900298 | 2034 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2035 | bssid = NULL; |
2036 | ||
46900298 | 2037 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2038 | ssid = NULL; |
2039 | ssid_len = 0; | |
2040 | } | |
2041 | ||
2042 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2043 | bssid, ssid, ssid_len, | |
2044 | capa_mask, capa_val); | |
2045 | ||
2046 | if (bss) { | |
2047 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2048 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2049 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2050 | bss->ssid_len); | |
2051 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2052 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2053 | bss->supp_rates); | |
46900298 JB |
2054 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2055 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2056 | else |
46900298 | 2057 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2058 | |
9c6bd790 JB |
2059 | /* Send out direct probe if no probe resp was received or |
2060 | * the one we have is outdated | |
2061 | */ | |
00d3f14c JB |
2062 | if (!bss->last_probe_resp || |
2063 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2064 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2065 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2066 | else |
46900298 | 2067 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2068 | |
00d3f14c | 2069 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2070 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2071 | return 0; |
2072 | } else { | |
46900298 | 2073 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 JB |
2074 | u8 ssid_len = 0; |
2075 | ||
2076 | if (!(ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL)) | |
2077 | ssid_len = ifmgd->ssid_len; | |
2078 | ||
46900298 | 2079 | ifmgd->assoc_scan_tries++; |
af88b907 | 2080 | |
f3b85252 JB |
2081 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2082 | ssid_len); | |
af88b907 | 2083 | |
46900298 JB |
2084 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2085 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2086 | } else { |
46900298 JB |
2087 | ifmgd->assoc_scan_tries = 0; |
2088 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 2089 | } |
9c6bd790 JB |
2090 | } |
2091 | return -1; | |
2092 | } | |
2093 | ||
2094 | ||
2095 | static void ieee80211_sta_work(struct work_struct *work) | |
2096 | { | |
2097 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2098 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2099 | struct ieee80211_local *local = sdata->local; |
46900298 | 2100 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2101 | struct sk_buff *skb; |
2102 | ||
2103 | if (!netif_running(sdata->dev)) | |
2104 | return; | |
2105 | ||
c2b13452 | 2106 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2107 | return; |
2108 | ||
46900298 | 2109 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2110 | return; |
46900298 | 2111 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2112 | |
46900298 | 2113 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2114 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2115 | ||
46900298 JB |
2116 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2117 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2118 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2119 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2120 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2121 | round_jiffies_relative(0)); | |
9c6bd790 | 2122 | return; |
f0706e82 JB |
2123 | } |
2124 | ||
46900298 JB |
2125 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2126 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2127 | return; |
46900298 JB |
2128 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2129 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2130 | return; |
d6f2da5b | 2131 | |
46900298 | 2132 | switch (ifmgd->state) { |
9c6bd790 JB |
2133 | case IEEE80211_STA_MLME_DISABLED: |
2134 | break; | |
2135 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2136 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2137 | break; |
2138 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2139 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2140 | break; |
2141 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2142 | ieee80211_associate(sdata); |
9c6bd790 JB |
2143 | break; |
2144 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2145 | ieee80211_associated(sdata); |
9c6bd790 JB |
2146 | break; |
2147 | default: | |
2148 | WARN_ON(1); | |
2149 | break; | |
2150 | } | |
2151 | ||
46900298 | 2152 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2153 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2154 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2155 | ||
46900298 | 2156 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2157 | WLAN_REASON_UNSPECIFIED); |
2158 | } | |
f0706e82 JB |
2159 | } |
2160 | ||
9c6bd790 JB |
2161 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2162 | { | |
ad935687 KV |
2163 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2164 | /* | |
2165 | * Need to update last_beacon to avoid beacon loss | |
2166 | * test to trigger. | |
2167 | */ | |
2168 | sdata->u.mgd.last_beacon = jiffies; | |
2169 | ||
2170 | ||
9c6bd790 | 2171 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2172 | &sdata->u.mgd.work); |
ad935687 | 2173 | } |
9c6bd790 | 2174 | } |
f0706e82 | 2175 | |
9c6bd790 JB |
2176 | /* interface setup */ |
2177 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2178 | { |
46900298 | 2179 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2180 | u32 hw_flags; |
988c0f72 | 2181 | |
46900298 JB |
2182 | ifmgd = &sdata->u.mgd; |
2183 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2184 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2185 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2186 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2187 | (unsigned long) sdata); |
46900298 | 2188 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2189 | (unsigned long) sdata); |
46900298 | 2190 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2191 | |
46900298 JB |
2192 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2193 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2194 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2195 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2196 | IEEE80211_STA_AUTO_BSSID_SEL | |
2197 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2198 | if (sdata->local->hw.queues >= 4) |
46900298 | 2199 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2200 | |
2201 | hw_flags = sdata->local->hw.flags; | |
2202 | ||
2203 | if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { | |
2204 | ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; | |
2205 | sdata->local->hw.conf.dynamic_ps_timeout = 500; | |
2206 | } | |
f0706e82 JB |
2207 | } |
2208 | ||
9c6bd790 | 2209 | /* configuration hooks */ |
46900298 | 2210 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2211 | { |
46900298 | 2212 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2213 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2214 | |
46900298 | 2215 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2216 | return; |
60f8b39c | 2217 | |
46900298 | 2218 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2219 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2220 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2221 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2222 | |
46900298 JB |
2223 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2224 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2225 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2226 | |
636a5d36 JM |
2227 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2228 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2229 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2230 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2231 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2232 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2233 | } |
2234 | } | |
60f8b39c | 2235 | |
79f6440c AF |
2236 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2237 | { | |
2238 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2239 | ||
79f6440c AF |
2240 | if (ifmgd->ssid_len) |
2241 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2242 | else | |
2243 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2244 | ||
2245 | return 0; | |
2246 | } | |
2247 | ||
9c6bd790 JB |
2248 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2249 | { | |
46900298 | 2250 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2251 | |
9c6bd790 JB |
2252 | if (len > IEEE80211_MAX_SSID_LEN) |
2253 | return -EINVAL; | |
2254 | ||
46900298 | 2255 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2256 | |
46900298 | 2257 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2258 | /* |
2259 | * Do not use reassociation if SSID is changed (different ESS). | |
2260 | */ | |
2261 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2262 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2263 | memcpy(ifmgd->ssid, ssid, len); | |
2264 | ifmgd->ssid_len = len; | |
60f8b39c | 2265 | } |
60f8b39c | 2266 | |
79f6440c | 2267 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2268 | } |
2269 | ||
2270 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2271 | { | |
46900298 JB |
2272 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2273 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2274 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2275 | return 0; |
2276 | } | |
2277 | ||
2278 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2279 | { | |
46900298 | 2280 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2281 | |
dfe67012 | 2282 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2283 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2284 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2285 | } else { |
46900298 JB |
2286 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2287 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2288 | } |
2289 | ||
2d0ddec5 JB |
2290 | if (netif_running(sdata->dev)) |
2291 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
60f8b39c | 2292 | |
79f6440c | 2293 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2294 | } |
2295 | ||
636a5d36 JM |
2296 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2297 | const char *ie, size_t len) | |
9c6bd790 | 2298 | { |
46900298 | 2299 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2300 | |
46900298 | 2301 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2302 | if (len == 0) { |
46900298 JB |
2303 | ifmgd->extra_ie = NULL; |
2304 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2305 | return 0; |
60f8b39c | 2306 | } |
46900298 JB |
2307 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2308 | if (!ifmgd->extra_ie) { | |
2309 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2310 | return -ENOMEM; |
2311 | } | |
46900298 JB |
2312 | memcpy(ifmgd->extra_ie, ie, len); |
2313 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2314 | return 0; |
60f8b39c JB |
2315 | } |
2316 | ||
f698d856 | 2317 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2318 | { |
f4ea83dd | 2319 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2320 | sdata->dev->name, reason); |
f0706e82 | 2321 | |
46900298 | 2322 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2323 | return 0; |
2324 | } | |
2325 | ||
f698d856 | 2326 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2327 | { |
46900298 | 2328 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2329 | |
f4ea83dd | 2330 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2331 | sdata->dev->name, reason); |
f0706e82 | 2332 | |
46900298 JB |
2333 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2334 | return -ENOLINK; | |
f0706e82 | 2335 | |
46900298 | 2336 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2337 | return 0; |
2338 | } | |
84363e6e | 2339 | |
9c6bd790 JB |
2340 | /* scan finished notification */ |
2341 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2342 | { | |
2343 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2344 | |
2345 | /* Restart STA timers */ | |
2346 | rcu_read_lock(); | |
2347 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2348 | ieee80211_restart_sta_timer(sdata); | |
2349 | rcu_read_unlock(); | |
2350 | } | |
10f644a4 JB |
2351 | |
2352 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2353 | unsigned long data, void *dummy) | |
2354 | { | |
2355 | s32 latency_usec = (s32) data; | |
2356 | struct ieee80211_local *local = | |
2357 | container_of(nb, struct ieee80211_local, | |
2358 | network_latency_notifier); | |
2359 | ||
2360 | mutex_lock(&local->iflist_mtx); | |
2361 | ieee80211_recalc_ps(local, latency_usec); | |
2362 | mutex_unlock(&local->iflist_mtx); | |
2363 | ||
2364 | return 0; | |
2365 | } |