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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; | |
d5522e03 JB |
98 | struct sta_info *sta; |
99 | u32 changed = 0; | |
9ed6bcce | 100 | u16 ht_opmode; |
d5522e03 JB |
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 | ||
d5522e03 JB |
106 | /* HT is not supported */ |
107 | if (!sband->ht_cap.ht_supported) | |
108 | enable_ht = false; | |
109 | ||
110 | /* check that channel matches the right operating channel */ | |
111 | if (local->hw.conf.channel->center_freq != | |
112 | ieee80211_channel_to_frequency(hti->control_chan)) | |
113 | enable_ht = false; | |
114 | ||
115 | if (enable_ht) { | |
116 | channel_type = NL80211_CHAN_HT20; | |
117 | ||
118 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
119 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
120 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
121 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
122 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
123 | channel_type = NL80211_CHAN_HT40PLUS; | |
124 | break; | |
125 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
126 | channel_type = NL80211_CHAN_HT40MINUS; | |
127 | break; | |
128 | } | |
129 | } | |
130 | } | |
131 | ||
132 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
133 | channel_type != local->hw.conf.channel_type; | |
134 | ||
135 | local->oper_channel_type = channel_type; | |
136 | ||
137 | if (ht_changed) { | |
138 | /* channel_type change automatically detected */ | |
139 | ieee80211_hw_config(local, 0); | |
140 | ||
141 | rcu_read_lock(); | |
142 | ||
143 | sta = sta_info_get(local, ifmgd->bssid); | |
144 | if (sta) | |
145 | rate_control_rate_update(local, sband, sta, | |
146 | IEEE80211_RC_HT_CHANGED); | |
147 | ||
148 | rcu_read_unlock(); | |
d5522e03 JB |
149 | } |
150 | ||
151 | /* disable HT */ | |
152 | if (!enable_ht) | |
153 | return 0; | |
154 | ||
9ed6bcce | 155 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
156 | |
157 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
158 | if (!sdata->ht_opmode_valid || |
159 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 160 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 161 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 162 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
163 | } |
164 | ||
165 | return changed; | |
166 | } | |
167 | ||
9c6bd790 JB |
168 | /* frame sending functions */ |
169 | ||
46900298 | 170 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 171 | { |
46900298 | 172 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
173 | struct ieee80211_local *local = sdata->local; |
174 | struct sk_buff *skb; | |
175 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 176 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
177 | int i, len, count, rates_len, supp_rates_len; |
178 | u16 capab; | |
c2b13452 | 179 | struct ieee80211_bss *bss; |
9ac19a90 JB |
180 | int wmm = 0; |
181 | struct ieee80211_supported_band *sband; | |
881d948c | 182 | u32 rates = 0; |
9ac19a90 JB |
183 | |
184 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 185 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 186 | ifmgd->ssid_len); |
9ac19a90 JB |
187 | if (!skb) { |
188 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
189 | "frame\n", sdata->dev->name); | |
190 | return; | |
191 | } | |
192 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
193 | ||
194 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
195 | ||
46900298 | 196 | capab = ifmgd->capab; |
9ac19a90 JB |
197 | |
198 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
199 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
200 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
201 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
202 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
203 | } | |
204 | ||
46900298 | 205 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 206 | local->hw.conf.channel->center_freq, |
46900298 | 207 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 208 | if (bss) { |
00d3f14c | 209 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
210 | capab |= WLAN_CAPABILITY_PRIVACY; |
211 | if (bss->wmm_used) | |
212 | wmm = 1; | |
213 | ||
214 | /* get all rates supported by the device and the AP as | |
215 | * some APs don't like getting a superset of their rates | |
216 | * in the association request (e.g. D-Link DAP 1353 in | |
217 | * b-only mode) */ | |
218 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
219 | ||
00d3f14c | 220 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
221 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
222 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
223 | ||
224 | ieee80211_rx_bss_put(local, bss); | |
225 | } else { | |
226 | rates = ~0; | |
227 | rates_len = sband->n_bitrates; | |
228 | } | |
229 | ||
230 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
231 | memset(mgmt, 0, 24); | |
46900298 | 232 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 233 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 234 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 235 | |
46900298 | 236 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
237 | skb_put(skb, 10); |
238 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
239 | IEEE80211_STYPE_REASSOC_REQ); | |
240 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
241 | mgmt->u.reassoc_req.listen_interval = | |
242 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 243 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
244 | ETH_ALEN); |
245 | } else { | |
246 | skb_put(skb, 4); | |
247 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
248 | IEEE80211_STYPE_ASSOC_REQ); | |
249 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 250 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
251 | cpu_to_le16(local->hw.conf.listen_interval); |
252 | } | |
253 | ||
254 | /* SSID */ | |
46900298 | 255 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 256 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
257 | *pos++ = ifmgd->ssid_len; |
258 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
259 | |
260 | /* add all rates which were marked to be used above */ | |
261 | supp_rates_len = rates_len; | |
262 | if (supp_rates_len > 8) | |
263 | supp_rates_len = 8; | |
264 | ||
265 | len = sband->n_bitrates; | |
266 | pos = skb_put(skb, supp_rates_len + 2); | |
267 | *pos++ = WLAN_EID_SUPP_RATES; | |
268 | *pos++ = supp_rates_len; | |
269 | ||
270 | count = 0; | |
271 | for (i = 0; i < sband->n_bitrates; i++) { | |
272 | if (BIT(i) & rates) { | |
273 | int rate = sband->bitrates[i].bitrate; | |
274 | *pos++ = (u8) (rate / 5); | |
275 | if (++count == 8) | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
280 | if (rates_len > count) { | |
281 | pos = skb_put(skb, rates_len - count + 2); | |
282 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
283 | *pos++ = rates_len - count; | |
284 | ||
285 | for (i++; i < sband->n_bitrates; i++) { | |
286 | if (BIT(i) & rates) { | |
287 | int rate = sband->bitrates[i].bitrate; | |
288 | *pos++ = (u8) (rate / 5); | |
289 | } | |
290 | } | |
291 | } | |
292 | ||
293 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
294 | /* 1. power capabilities */ | |
295 | pos = skb_put(skb, 4); | |
296 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
297 | *pos++ = 2; | |
298 | *pos++ = 0; /* min tx power */ | |
299 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
300 | ||
301 | /* 2. supported channels */ | |
302 | /* TODO: get this in reg domain format */ | |
303 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
304 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
305 | *pos++ = 2 * sband->n_channels; | |
306 | for (i = 0; i < sband->n_channels; i++) { | |
307 | *pos++ = ieee80211_frequency_to_channel( | |
308 | sband->channels[i].center_freq); | |
309 | *pos++ = 1; /* one channel in the subband*/ | |
310 | } | |
311 | } | |
312 | ||
46900298 JB |
313 | if (ifmgd->extra_ie) { |
314 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
315 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
316 | } |
317 | ||
46900298 | 318 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
319 | pos = skb_put(skb, 9); |
320 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
321 | *pos++ = 7; /* len */ | |
322 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
323 | *pos++ = 0x50; | |
324 | *pos++ = 0xf2; | |
325 | *pos++ = 2; /* WME */ | |
326 | *pos++ = 0; /* WME info */ | |
327 | *pos++ = 1; /* WME ver */ | |
328 | *pos++ = 0; | |
329 | } | |
330 | ||
331 | /* wmm support is a must to HT */ | |
eb46936b VT |
332 | /* |
333 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
334 | * ciphers in HT mode. We still associate in non-ht | |
335 | * mode (11a/b/g) if any one of these ciphers is | |
336 | * configured as pairwise. | |
337 | */ | |
46900298 | 338 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
339 | sband->ht_cap.ht_supported && |
340 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 341 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 342 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
343 | struct ieee80211_ht_info *ht_info = |
344 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
345 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
346 | __le16 tmp; |
347 | u32 flags = local->hw.conf.channel->flags; | |
348 | ||
d9fe60de JB |
349 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
350 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 351 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 352 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
353 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
354 | } | |
355 | break; | |
d9fe60de | 356 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 357 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 358 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
359 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
360 | } | |
361 | break; | |
362 | } | |
363 | ||
364 | tmp = cpu_to_le16(cap); | |
365 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
366 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
367 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
368 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
369 | memcpy(pos, &tmp, sizeof(u16)); | |
370 | pos += sizeof(u16); | |
371 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
372 | *pos++ = sband->ht_cap.ampdu_factor | |
373 | (sband->ht_cap.ampdu_density << 2); | |
374 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
375 | } |
376 | ||
46900298 JB |
377 | kfree(ifmgd->assocreq_ies); |
378 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
379 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
380 | if (ifmgd->assocreq_ies) | |
381 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 382 | |
e50db65c | 383 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
384 | } |
385 | ||
386 | ||
ef422bc0 JB |
387 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
388 | u16 stype, u16 reason) | |
9ac19a90 JB |
389 | { |
390 | struct ieee80211_local *local = sdata->local; | |
46900298 | 391 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
392 | struct sk_buff *skb; |
393 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 394 | |
65fc73ac | 395 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 396 | if (!skb) { |
ef422bc0 JB |
397 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
398 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
399 | return; |
400 | } | |
401 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
402 | ||
403 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
404 | memset(mgmt, 0, 24); | |
46900298 | 405 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 406 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 407 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 408 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 409 | skb_put(skb, 2); |
ef422bc0 | 410 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
411 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
412 | ||
53b46b84 JM |
413 | if (stype == IEEE80211_STYPE_DEAUTH) |
414 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
415 | else | |
416 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 417 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
418 | } |
419 | ||
572e0012 KV |
420 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
421 | struct ieee80211_sub_if_data *sdata) | |
422 | { | |
46900298 | 423 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
424 | struct ieee80211_pspoll *pspoll; |
425 | struct sk_buff *skb; | |
426 | u16 fc; | |
427 | ||
428 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
429 | if (!skb) { | |
430 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
431 | "pspoll frame\n", sdata->dev->name); | |
432 | return; | |
433 | } | |
434 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
435 | ||
436 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
437 | memset(pspoll, 0, sizeof(*pspoll)); | |
438 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
439 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 440 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
441 | |
442 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
443 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
444 | ||
46900298 | 445 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
446 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
447 | ||
448 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
449 | } |
450 | ||
965bedad JB |
451 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
452 | struct ieee80211_sub_if_data *sdata, | |
453 | int powersave) | |
454 | { | |
455 | struct sk_buff *skb; | |
456 | struct ieee80211_hdr *nullfunc; | |
457 | __le16 fc; | |
458 | ||
459 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
460 | return; | |
461 | ||
462 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
463 | if (!skb) { | |
464 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
465 | "frame\n", sdata->dev->name); | |
466 | return; | |
467 | } | |
468 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
469 | ||
470 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
471 | memset(nullfunc, 0, 24); | |
472 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
473 | IEEE80211_FCTL_TODS); | |
474 | if (powersave) | |
475 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
476 | nullfunc->frame_control = fc; | |
477 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
478 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
479 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
480 | ||
481 | ieee80211_tx_skb(sdata, skb, 0); | |
482 | } | |
483 | ||
484 | /* powersave */ | |
485 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
486 | struct ieee80211_sub_if_data *sdata) | |
487 | { | |
488 | struct ieee80211_conf *conf = &local->hw.conf; | |
489 | ||
d5edaedc JB |
490 | /* |
491 | * If we are scanning right now then the parameters will | |
492 | * take effect when scan finishes. | |
493 | */ | |
494 | if (local->hw_scanning || local->sw_scanning) | |
495 | return; | |
496 | ||
965bedad JB |
497 | if (conf->dynamic_ps_timeout > 0 && |
498 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
499 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
500 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
501 | } else { | |
502 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
503 | ieee80211_send_nullfunc(local, sdata, 1); | |
504 | conf->flags |= IEEE80211_CONF_PS; | |
505 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
506 | } | |
507 | } | |
508 | ||
509 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
510 | { | |
511 | struct ieee80211_conf *conf = &local->hw.conf; | |
512 | ||
513 | if (local->ps_sdata) { | |
514 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
515 | return; | |
516 | ||
517 | ieee80211_enable_ps(local, local->ps_sdata); | |
518 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
519 | conf->flags &= ~IEEE80211_CONF_PS; | |
520 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
521 | del_timer_sync(&local->dynamic_ps_timer); | |
522 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
523 | } | |
524 | } | |
525 | ||
526 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 527 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
528 | { |
529 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
530 | int count = 0; | |
531 | ||
532 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
533 | local->ps_sdata = NULL; | |
534 | return; | |
535 | } | |
536 | ||
537 | list_for_each_entry(sdata, &local->interfaces, list) { | |
538 | if (!netif_running(sdata->dev)) | |
539 | continue; | |
540 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
541 | continue; | |
542 | found = sdata; | |
543 | count++; | |
544 | } | |
545 | ||
10f644a4 JB |
546 | if (count == 1 && found->u.mgd.powersave) { |
547 | s32 beaconint_us; | |
548 | ||
549 | if (latency < 0) | |
550 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
551 | ||
552 | beaconint_us = ieee80211_tu_to_usec( | |
553 | found->vif.bss_conf.beacon_int); | |
554 | ||
04fe2037 | 555 | if (beaconint_us > latency) { |
10f644a4 | 556 | local->ps_sdata = NULL; |
04fe2037 JB |
557 | } else { |
558 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
559 | int maxslp = 1; | |
560 | ||
561 | if (dtimper > 1) | |
562 | maxslp = min_t(int, dtimper, | |
563 | latency / beaconint_us); | |
564 | ||
9ccebe61 | 565 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 566 | local->ps_sdata = found; |
04fe2037 | 567 | } |
10f644a4 | 568 | } else { |
965bedad | 569 | local->ps_sdata = NULL; |
10f644a4 | 570 | } |
965bedad JB |
571 | |
572 | ieee80211_change_ps(local); | |
573 | } | |
574 | ||
575 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
576 | { | |
577 | struct ieee80211_local *local = | |
578 | container_of(work, struct ieee80211_local, | |
579 | dynamic_ps_disable_work); | |
580 | ||
581 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
582 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
583 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
584 | } | |
585 | ||
586 | ieee80211_wake_queues_by_reason(&local->hw, | |
587 | IEEE80211_QUEUE_STOP_REASON_PS); | |
588 | } | |
589 | ||
590 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
591 | { | |
592 | struct ieee80211_local *local = | |
593 | container_of(work, struct ieee80211_local, | |
594 | dynamic_ps_enable_work); | |
595 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
596 | ||
597 | /* can only happen when PS was just disabled anyway */ | |
598 | if (!sdata) | |
599 | return; | |
600 | ||
601 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
602 | return; | |
603 | ||
604 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
605 | ieee80211_send_nullfunc(local, sdata, 1); | |
606 | ||
607 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
608 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
609 | } | |
610 | ||
611 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
612 | { | |
613 | struct ieee80211_local *local = (void *) data; | |
614 | ||
615 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
616 | } | |
617 | ||
60f8b39c | 618 | /* MLME */ |
f698d856 | 619 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 620 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
621 | u8 *wmm_param, size_t wmm_param_len) |
622 | { | |
f0706e82 JB |
623 | struct ieee80211_tx_queue_params params; |
624 | size_t left; | |
625 | int count; | |
626 | u8 *pos; | |
627 | ||
46900298 | 628 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
629 | return; |
630 | ||
631 | if (!wmm_param) | |
632 | return; | |
633 | ||
f0706e82 JB |
634 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
635 | return; | |
636 | count = wmm_param[6] & 0x0f; | |
46900298 | 637 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 638 | return; |
46900298 | 639 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
640 | |
641 | pos = wmm_param + 8; | |
642 | left = wmm_param_len - 8; | |
643 | ||
644 | memset(¶ms, 0, sizeof(params)); | |
645 | ||
f0706e82 JB |
646 | local->wmm_acm = 0; |
647 | for (; left >= 4; left -= 4, pos += 4) { | |
648 | int aci = (pos[0] >> 5) & 0x03; | |
649 | int acm = (pos[0] >> 4) & 0x01; | |
650 | int queue; | |
651 | ||
652 | switch (aci) { | |
0eeb59fe | 653 | case 1: /* AC_BK */ |
e100bb64 | 654 | queue = 3; |
988c0f72 | 655 | if (acm) |
0eeb59fe | 656 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 657 | break; |
0eeb59fe | 658 | case 2: /* AC_VI */ |
e100bb64 | 659 | queue = 1; |
988c0f72 | 660 | if (acm) |
0eeb59fe | 661 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 662 | break; |
0eeb59fe | 663 | case 3: /* AC_VO */ |
e100bb64 | 664 | queue = 0; |
988c0f72 | 665 | if (acm) |
0eeb59fe | 666 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 667 | break; |
0eeb59fe | 668 | case 0: /* AC_BE */ |
f0706e82 | 669 | default: |
e100bb64 | 670 | queue = 2; |
988c0f72 | 671 | if (acm) |
0eeb59fe | 672 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
673 | break; |
674 | } | |
675 | ||
676 | params.aifs = pos[0] & 0x0f; | |
677 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
678 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 679 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 680 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 681 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 682 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 683 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
684 | params.cw_max, params.txop); |
685 | #endif | |
24487981 | 686 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 687 | printk(KERN_DEBUG "%s: failed to set TX queue " |
24487981 JB |
688 | "parameters for queue %d\n", local->mdev->name, |
689 | queue); | |
f0706e82 JB |
690 | } |
691 | } | |
692 | ||
7a5158ef JB |
693 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
694 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 695 | { |
bda3933a | 696 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 697 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 698 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 699 | #endif |
471b3efd | 700 | u32 changed = 0; |
7a5158ef JB |
701 | bool use_protection; |
702 | bool use_short_preamble; | |
703 | bool use_short_slot; | |
704 | ||
705 | if (erp_valid) { | |
706 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
707 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
708 | } else { | |
709 | use_protection = false; | |
710 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
711 | } | |
712 | ||
713 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 714 | |
471b3efd | 715 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 716 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 717 | if (net_ratelimit()) { |
0c68ae26 | 718 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 719 | sdata->dev->name, |
5628221c | 720 | use_protection ? "enabled" : "disabled", |
46900298 | 721 | ifmgd->bssid); |
5628221c | 722 | } |
f4ea83dd | 723 | #endif |
471b3efd JB |
724 | bss_conf->use_cts_prot = use_protection; |
725 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 726 | } |
7e9ed188 | 727 | |
d43c7b37 | 728 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 729 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
730 | if (net_ratelimit()) { |
731 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 732 | " (BSSID=%pM)\n", |
471b3efd | 733 | sdata->dev->name, |
d43c7b37 | 734 | use_short_preamble ? "short" : "long", |
46900298 | 735 | ifmgd->bssid); |
7e9ed188 | 736 | } |
f4ea83dd | 737 | #endif |
d43c7b37 | 738 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 739 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 740 | } |
d9430a32 | 741 | |
7a5158ef JB |
742 | if (use_short_slot != bss_conf->use_short_slot) { |
743 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
744 | if (net_ratelimit()) { | |
391429c1 CL |
745 | printk(KERN_DEBUG "%s: switched to %s slot time" |
746 | " (BSSID=%pM)\n", | |
7a5158ef JB |
747 | sdata->dev->name, |
748 | use_short_slot ? "short" : "long", | |
46900298 | 749 | ifmgd->bssid); |
7a5158ef JB |
750 | } |
751 | #endif | |
752 | bss_conf->use_short_slot = use_short_slot; | |
753 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
754 | } |
755 | ||
756 | return changed; | |
757 | } | |
758 | ||
46900298 | 759 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
760 | { |
761 | union iwreq_data wrqu; | |
46900298 | 762 | |
f5e5bf25 | 763 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
764 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
765 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
766 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
767 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
768 | } | |
769 | ||
46900298 | 770 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 771 | { |
46900298 | 772 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
773 | char *buf; |
774 | size_t len; | |
775 | int i; | |
f0706e82 JB |
776 | union iwreq_data wrqu; |
777 | ||
46900298 | 778 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
779 | return; |
780 | ||
46900298 JB |
781 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
782 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
783 | if (!buf) |
784 | return; | |
785 | ||
786 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 787 | if (ifmgd->assocreq_ies) { |
74af0250 | 788 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 789 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 790 | len += sprintf(buf + len, "%02x", |
46900298 | 791 | ifmgd->assocreq_ies[i]); |
74af0250 | 792 | } |
f0706e82 | 793 | } |
46900298 JB |
794 | if (ifmgd->assocresp_ies) { |
795 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
796 | len += sprintf(buf + len, " "); |
797 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 798 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 799 | len += sprintf(buf + len, "%02x", |
46900298 | 800 | ifmgd->assocresp_ies[i]); |
74af0250 | 801 | } |
f0706e82 | 802 | } |
74af0250 LT |
803 | len += sprintf(buf + len, ")"); |
804 | ||
805 | if (len > IW_CUSTOM_MAX) { | |
806 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 807 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 808 | len += sprintf(buf + len, "%02x", |
46900298 | 809 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
810 | } |
811 | } | |
812 | ||
ad788b5e JL |
813 | if (len <= IW_CUSTOM_MAX) { |
814 | memset(&wrqu, 0, sizeof(wrqu)); | |
815 | wrqu.data.length = len; | |
816 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
817 | } | |
74af0250 LT |
818 | |
819 | kfree(buf); | |
f0706e82 JB |
820 | } |
821 | ||
822 | ||
f698d856 | 823 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 824 | u32 bss_info_changed) |
f0706e82 | 825 | { |
46900298 | 826 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 827 | struct ieee80211_local *local = sdata->local; |
38668c05 | 828 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 829 | |
c2b13452 | 830 | struct ieee80211_bss *bss; |
d6f2da5b | 831 | |
ae5eb026 | 832 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 833 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 834 | |
46900298 | 835 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 836 | conf->channel->center_freq, |
46900298 | 837 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
838 | if (bss) { |
839 | /* set timing information */ | |
00d3f14c JB |
840 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
841 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 842 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 843 | |
57c4d7b4 | 844 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 845 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 846 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 847 | |
04de8381 KV |
848 | cfg80211_hold_bss(&bss->cbss); |
849 | ||
9ac19a90 | 850 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
851 | } |
852 | ||
46900298 JB |
853 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
854 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
855 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 856 | |
46900298 | 857 | ifmgd->last_probe = jiffies; |
9ac19a90 | 858 | ieee80211_led_assoc(local, 1); |
9306102e | 859 | |
bda3933a | 860 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
861 | /* |
862 | * For now just always ask the driver to update the basic rateset | |
863 | * when we have associated, we aren't checking whether it actually | |
864 | * changed or not. | |
865 | */ | |
ae5eb026 JB |
866 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
867 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 868 | |
965bedad | 869 | /* will be same as sdata */ |
04fe2037 JB |
870 | if (local->ps_sdata) { |
871 | mutex_lock(&local->iflist_mtx); | |
872 | ieee80211_recalc_ps(local, -1); | |
873 | mutex_unlock(&local->iflist_mtx); | |
874 | } | |
e0cb686f | 875 | |
9ac19a90 JB |
876 | netif_tx_start_all_queues(sdata->dev); |
877 | netif_carrier_on(sdata->dev); | |
f0706e82 | 878 | |
46900298 | 879 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
880 | } |
881 | ||
46900298 | 882 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 883 | { |
46900298 | 884 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 885 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
886 | |
887 | ifmgd->direct_probe_tries++; | |
888 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 889 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
890 | sdata->dev->name, ifmgd->bssid); |
891 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 892 | ieee80211_recalc_idle(local); |
e61f2340 | 893 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
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 | |
9ac19a90 JB |
918 | /* Direct probe is sent to broadcast address as some APs |
919 | * will not answer to direct packet in unassociated state. | |
920 | */ | |
921 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 922 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 923 | |
46900298 | 924 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 925 | } |
f0706e82 | 926 | |
9ac19a90 | 927 | |
46900298 | 928 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 929 | { |
46900298 | 930 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 931 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
932 | u8 *ies; |
933 | size_t ies_len; | |
46900298 JB |
934 | |
935 | ifmgd->auth_tries++; | |
936 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 937 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 938 | " timed out\n", |
46900298 JB |
939 | sdata->dev->name, ifmgd->bssid); |
940 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 941 | ieee80211_recalc_idle(local); |
1965c853 | 942 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 943 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 944 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 945 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
946 | |
947 | /* | |
948 | * We might have a pending scan which had no chance to run yet | |
949 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
950 | * Hence, queue the STAs work again | |
951 | */ | |
952 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
953 | return; |
954 | } | |
f0706e82 | 955 | |
46900298 | 956 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 957 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 958 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 959 | |
636a5d36 JM |
960 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
961 | ies = ifmgd->sme_auth_ie; | |
962 | ies_len = ifmgd->sme_auth_ie_len; | |
963 | } else { | |
964 | ies = NULL; | |
965 | ies_len = 0; | |
966 | } | |
967 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
968 | ifmgd->bssid, 0); |
969 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 970 | |
46900298 | 971 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
972 | } |
973 | ||
5925d976 VN |
974 | /* |
975 | * The disassoc 'reason' argument can be either our own reason | |
976 | * if self disconnected or a reason code from the AP. | |
977 | */ | |
aa458d17 | 978 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
979 | bool deauth, bool self_disconnected, |
980 | u16 reason) | |
aa458d17 | 981 | { |
46900298 | 982 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 983 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
984 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
985 | struct ieee80211_bss *bss; | |
aa458d17 | 986 | struct sta_info *sta; |
e0cb686f | 987 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
988 | |
989 | rcu_read_lock(); | |
990 | ||
46900298 | 991 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
992 | if (!sta) { |
993 | rcu_read_unlock(); | |
994 | return; | |
995 | } | |
996 | ||
997 | if (deauth) { | |
46900298 JB |
998 | ifmgd->direct_probe_tries = 0; |
999 | ifmgd->auth_tries = 0; | |
aa458d17 | 1000 | } |
46900298 JB |
1001 | ifmgd->assoc_scan_tries = 0; |
1002 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1003 | |
24e64622 | 1004 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1005 | netif_carrier_off(sdata->dev); |
1006 | ||
2dace10e | 1007 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1008 | |
04de8381 KV |
1009 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1010 | conf->channel->center_freq, | |
1011 | ifmgd->ssid, ifmgd->ssid_len); | |
1012 | ||
1013 | if (bss) { | |
1014 | cfg80211_unhold_bss(&bss->cbss); | |
1015 | ieee80211_rx_bss_put(local, bss); | |
1016 | } | |
1017 | ||
aa458d17 TW |
1018 | if (self_disconnected) { |
1019 | if (deauth) | |
ef422bc0 JB |
1020 | ieee80211_send_deauth_disassoc(sdata, |
1021 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1022 | else |
ef422bc0 JB |
1023 | ieee80211_send_deauth_disassoc(sdata, |
1024 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1025 | } |
1026 | ||
46900298 | 1027 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1028 | changed |= ieee80211_reset_erp_info(sdata); |
1029 | ||
f5e5bf25 | 1030 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1031 | changed |= BSS_CHANGED_ASSOC; |
1032 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1033 | |
46900298 | 1034 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1035 | |
7a947080 | 1036 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1037 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1038 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1039 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1040 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1041 | } |
aa458d17 | 1042 | |
aa458d17 TW |
1043 | rcu_read_unlock(); |
1044 | ||
aa837e1d JB |
1045 | ieee80211_set_wmm_default(sdata); |
1046 | ||
5cff20e6 JB |
1047 | ieee80211_recalc_idle(local); |
1048 | ||
4797938c | 1049 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1050 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1051 | |
413ad50a JB |
1052 | /* on the next assoc, re-program HT parameters */ |
1053 | sdata->ht_opmode_valid = false; | |
1054 | ||
a8302de9 VT |
1055 | local->power_constr_level = 0; |
1056 | ||
520eb820 KV |
1057 | del_timer_sync(&local->dynamic_ps_timer); |
1058 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1059 | ||
e0cb686f KV |
1060 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1061 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1062 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1063 | } | |
ae5eb026 | 1064 | |
e0cb686f | 1065 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1066 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1067 | |
1068 | rcu_read_lock(); | |
1069 | ||
46900298 | 1070 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1071 | if (!sta) { |
1072 | rcu_read_unlock(); | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | sta_info_unlink(&sta); | |
1077 | ||
1078 | rcu_read_unlock(); | |
1079 | ||
1080 | sta_info_destroy(sta); | |
aa458d17 | 1081 | } |
f0706e82 | 1082 | |
9ac19a90 JB |
1083 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1084 | { | |
1085 | if (!sdata || !sdata->default_key || | |
1086 | sdata->default_key->conf.alg != ALG_WEP) | |
1087 | return 0; | |
1088 | return 1; | |
1089 | } | |
1090 | ||
46900298 | 1091 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1092 | { |
46900298 | 1093 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1094 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1095 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1096 | int bss_privacy; |
1097 | int wep_privacy; | |
1098 | int privacy_invoked; | |
f0706e82 | 1099 | |
7986cf95 | 1100 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1101 | return 0; |
1102 | ||
46900298 | 1103 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1104 | local->hw.conf.channel->center_freq, |
46900298 | 1105 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1106 | if (!bss) |
1107 | return 0; | |
1108 | ||
00d3f14c | 1109 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1110 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1111 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1112 | |
3e122be0 | 1113 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1114 | |
5b98b1f7 JB |
1115 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1116 | return 0; | |
1117 | ||
1118 | return 1; | |
f0706e82 JB |
1119 | } |
1120 | ||
46900298 | 1121 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1122 | { |
46900298 | 1123 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1124 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1125 | |
1126 | ifmgd->assoc_tries++; | |
1127 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1128 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1129 | " timed out\n", |
46900298 JB |
1130 | sdata->dev->name, ifmgd->bssid); |
1131 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1132 | ieee80211_recalc_idle(local); |
1965c853 | 1133 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1134 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1135 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1136 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1137 | /* |
1138 | * We might have a pending scan which had no chance to run yet | |
1139 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1140 | * Hence, queue the STAs work again | |
1141 | */ | |
1142 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1143 | return; |
1144 | } | |
1145 | ||
46900298 | 1146 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1147 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1148 | sdata->dev->name, ifmgd->bssid); |
1149 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1150 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1151 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1152 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
5cff20e6 | 1153 | ieee80211_recalc_idle(local); |
f0706e82 JB |
1154 | return; |
1155 | } | |
1156 | ||
46900298 | 1157 | ieee80211_send_assoc(sdata); |
f0706e82 | 1158 | |
46900298 | 1159 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1160 | } |
1161 | ||
3cf335d5 KV |
1162 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1163 | struct ieee80211_hdr *hdr) | |
1164 | { | |
1165 | /* | |
1166 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1167 | * from AP because we know that the connection is working both ways | |
1168 | * at that time. But multicast frames (and hence also beacons) must | |
1169 | * be ignored here, because we need to trigger the timer during | |
1170 | * data idle periods for sending the periodical probe request to | |
1171 | * the AP. | |
1172 | */ | |
1173 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1174 | mod_timer(&sdata->u.mgd.timer, | |
1175 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1176 | } | |
f0706e82 | 1177 | |
04de8381 KV |
1178 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1179 | { | |
1180 | struct ieee80211_sub_if_data *sdata = | |
1181 | container_of(work, struct ieee80211_sub_if_data, | |
1182 | u.mgd.beacon_loss_work); | |
1183 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1184 | ||
a860402d MB |
1185 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1186 | if (net_ratelimit()) { | |
1187 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1188 | "- sending probe request\n", sdata->dev->name, | |
1189 | sdata->u.mgd.bssid); | |
1190 | } | |
1191 | #endif | |
04de8381 KV |
1192 | |
1193 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1194 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1195 | ifmgd->ssid_len, NULL, 0); | |
1196 | ||
1197 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL); | |
1198 | } | |
1199 | ||
1200 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1201 | { | |
1202 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1203 | ||
1204 | queue_work(sdata->local->hw.workqueue, | |
1205 | &sdata->u.mgd.beacon_loss_work); | |
1206 | } | |
1207 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1208 | ||
46900298 | 1209 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1210 | { |
46900298 | 1211 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1212 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1213 | struct sta_info *sta; |
15b7b062 | 1214 | bool disassoc = false; |
f0706e82 JB |
1215 | |
1216 | /* TODO: start monitoring current AP signal quality and number of | |
1217 | * missed beacons. Scan other channels every now and then and search | |
1218 | * for better APs. */ | |
1219 | /* TODO: remove expired BSSes */ | |
1220 | ||
46900298 | 1221 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1222 | |
d0709a65 JB |
1223 | rcu_read_lock(); |
1224 | ||
46900298 | 1225 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1226 | if (!sta) { |
0c68ae26 | 1227 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1228 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1229 | disassoc = true; |
1230 | goto unlock; | |
1231 | } | |
1232 | ||
1233 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
1234 | time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
1235 | printk(KERN_DEBUG "%s: no probe response from AP %pM " | |
1236 | "- disassociating\n", | |
1237 | sdata->dev->name, ifmgd->bssid); | |
1238 | disassoc = true; | |
1239 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1240 | goto unlock; | |
1241 | } | |
1242 | ||
04de8381 KV |
1243 | /* |
1244 | * Beacon filtering is only enabled with power save and then the | |
1245 | * stack should not check for beacon loss. | |
1246 | */ | |
1247 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1248 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1249 | time_after(jiffies, | |
15b7b062 | 1250 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1251 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1252 | if (net_ratelimit()) { | |
1253 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1254 | "- sending probe request\n", | |
1255 | sdata->dev->name, ifmgd->bssid); | |
1256 | } | |
1257 | #endif | |
15b7b062 KV |
1258 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1259 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1260 | ifmgd->ssid_len, NULL, 0); | |
1261 | goto unlock; | |
1262 | ||
1263 | } | |
1264 | ||
1265 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1266 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1267 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1268 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1269 | } |
d0709a65 | 1270 | |
15b7b062 | 1271 | unlock: |
d0709a65 JB |
1272 | rcu_read_unlock(); |
1273 | ||
7a947080 | 1274 | if (disassoc) |
46900298 | 1275 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1276 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1277 | else |
46900298 | 1278 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1279 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1280 | } |
1281 | ||
1282 | ||
46900298 | 1283 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1284 | { |
46900298 JB |
1285 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1286 | ||
f698d856 | 1287 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1288 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1289 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1290 | /* Wait for SME to request association */ | |
1291 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1292 | ieee80211_recalc_idle(sdata->local); |
636a5d36 JM |
1293 | } else |
1294 | ieee80211_associate(sdata); | |
f0706e82 JB |
1295 | } |
1296 | ||
1297 | ||
f698d856 | 1298 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1299 | struct ieee80211_mgmt *mgmt, |
1300 | size_t len) | |
1301 | { | |
1302 | u8 *pos; | |
1303 | struct ieee802_11_elems elems; | |
1304 | ||
f0706e82 | 1305 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1306 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1307 | if (!elems.challenge) |
f0706e82 | 1308 | return; |
46900298 JB |
1309 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1310 | elems.challenge - 2, elems.challenge_len + 2, | |
1311 | sdata->u.mgd.bssid, 1); | |
1312 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1313 | } |
1314 | ||
f698d856 | 1315 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1316 | struct ieee80211_mgmt *mgmt, |
1317 | size_t len) | |
1318 | { | |
46900298 | 1319 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1320 | u16 auth_alg, auth_transaction, status_code; |
1321 | ||
46900298 | 1322 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1323 | return; |
f0706e82 | 1324 | |
f4ea83dd | 1325 | if (len < 24 + 6) |
f0706e82 | 1326 | return; |
f0706e82 | 1327 | |
46900298 | 1328 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1329 | return; |
f0706e82 | 1330 | |
46900298 | 1331 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1332 | return; |
f0706e82 JB |
1333 | |
1334 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1335 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1336 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1337 | ||
46900298 JB |
1338 | if (auth_alg != ifmgd->auth_alg || |
1339 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1340 | return; |
f0706e82 JB |
1341 | |
1342 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1343 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1344 | u8 algs[3]; | |
1345 | const int num_algs = ARRAY_SIZE(algs); | |
1346 | int i, pos; | |
1347 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1348 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1349 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1350 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1351 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1352 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1353 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1354 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1355 | pos = 0; |
46900298 | 1356 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1357 | pos = 1; |
1358 | else | |
1359 | pos = 2; | |
1360 | for (i = 0; i < num_algs; i++) { | |
1361 | pos++; | |
1362 | if (pos >= num_algs) | |
1363 | pos = 0; | |
46900298 | 1364 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1365 | algs[pos] == 0xff) |
1366 | continue; | |
1367 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1368 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1369 | continue; |
46900298 | 1370 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1371 | break; |
1372 | } | |
1373 | } | |
1374 | return; | |
1375 | } | |
1376 | ||
46900298 | 1377 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1378 | case WLAN_AUTH_OPEN: |
1379 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1380 | case WLAN_AUTH_FT: |
46900298 | 1381 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1382 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1383 | break; |
1384 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1385 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1386 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1387 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1388 | } else | |
46900298 | 1389 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1390 | break; |
1391 | } | |
1392 | } | |
1393 | ||
1394 | ||
f698d856 | 1395 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1396 | struct ieee80211_mgmt *mgmt, |
1397 | size_t len) | |
1398 | { | |
46900298 | 1399 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1400 | u16 reason_code; |
1401 | ||
f4ea83dd | 1402 | if (len < 24 + 2) |
f0706e82 | 1403 | return; |
f0706e82 | 1404 | |
46900298 | 1405 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1406 | return; |
f0706e82 JB |
1407 | |
1408 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1409 | ||
46900298 | 1410 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1411 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1412 | sdata->dev->name, reason_code); | |
f0706e82 | 1413 | |
636a5d36 JM |
1414 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1415 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1416 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1417 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1418 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1419 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1420 | IEEE80211_RETRY_AUTH_INTERVAL); |
1421 | } | |
1422 | ||
46900298 JB |
1423 | ieee80211_set_disassoc(sdata, true, false, 0); |
1424 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1425 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1426 | } |
1427 | ||
1428 | ||
f698d856 | 1429 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1430 | struct ieee80211_mgmt *mgmt, |
1431 | size_t len) | |
1432 | { | |
46900298 | 1433 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1434 | u16 reason_code; |
1435 | ||
f4ea83dd | 1436 | if (len < 24 + 2) |
f0706e82 | 1437 | return; |
f0706e82 | 1438 | |
46900298 | 1439 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1440 | return; |
f0706e82 JB |
1441 | |
1442 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1443 | ||
46900298 | 1444 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1445 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1446 | sdata->dev->name, reason_code); | |
f0706e82 | 1447 | |
636a5d36 JM |
1448 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1449 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1450 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1451 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1452 | IEEE80211_RETRY_AUTH_INTERVAL); |
1453 | } | |
1454 | ||
46900298 | 1455 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1456 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1457 | } |
1458 | ||
1459 | ||
471b3efd | 1460 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1461 | struct ieee80211_mgmt *mgmt, |
1462 | size_t len, | |
1463 | int reassoc) | |
1464 | { | |
46900298 | 1465 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1466 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1467 | struct ieee80211_supported_band *sband; |
f0706e82 | 1468 | struct sta_info *sta; |
881d948c | 1469 | u32 rates, basic_rates; |
f0706e82 JB |
1470 | u16 capab_info, status_code, aid; |
1471 | struct ieee802_11_elems elems; | |
bda3933a | 1472 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1473 | u8 *pos; |
ae5eb026 | 1474 | u32 changed = 0; |
f0706e82 | 1475 | int i, j; |
ddf4ac53 | 1476 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1477 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1478 | |
1479 | /* AssocResp and ReassocResp have identical structure, so process both | |
1480 | * of them in this function. */ | |
1481 | ||
46900298 | 1482 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1483 | return; |
f0706e82 | 1484 | |
f4ea83dd | 1485 | if (len < 24 + 6) |
f0706e82 | 1486 | return; |
f0706e82 | 1487 | |
46900298 | 1488 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1489 | return; |
f0706e82 JB |
1490 | |
1491 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1492 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1493 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1494 | |
0c68ae26 | 1495 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1496 | "status=%d aid=%d)\n", |
0c68ae26 | 1497 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1498 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1499 | |
63a5ab82 JM |
1500 | pos = mgmt->u.assoc_resp.variable; |
1501 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1502 | ||
1503 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1504 | elems.timeout_int && elems.timeout_int_len == 5 && |
1505 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1506 | u32 tu, ms; |
f797eb7e | 1507 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1508 | ms = tu * 1024 / 1000; |
1509 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1510 | "comeback duration %u TU (%u ms)\n", | |
1511 | sdata->dev->name, tu, ms); | |
1512 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1513 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1514 | jiffies + msecs_to_jiffies(ms)); |
1515 | return; | |
1516 | } | |
1517 | ||
f0706e82 JB |
1518 | if (status_code != WLAN_STATUS_SUCCESS) { |
1519 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1520 | sdata->dev->name, status_code); |
8a69aa93 DD |
1521 | /* if this was a reassociation, ensure we try a "full" |
1522 | * association next time. This works around some broken APs | |
1523 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1524 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1525 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1526 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1527 | /* Wait for SME to decide what to do next */ | |
1528 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1529 | ieee80211_recalc_idle(local); |
66174bbe | 1530 | } |
f0706e82 JB |
1531 | return; |
1532 | } | |
1533 | ||
1dd84aa2 JB |
1534 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1535 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1536 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1537 | aid &= ~(BIT(15) | BIT(14)); |
1538 | ||
f0706e82 JB |
1539 | if (!elems.supp_rates) { |
1540 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1541 | sdata->dev->name); |
f0706e82 JB |
1542 | return; |
1543 | } | |
1544 | ||
f698d856 | 1545 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1546 | ifmgd->aid = aid; |
1547 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1548 | |
46900298 JB |
1549 | kfree(ifmgd->assocresp_ies); |
1550 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1551 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1552 | if (ifmgd->assocresp_ies) | |
1553 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1554 | |
d0709a65 JB |
1555 | rcu_read_lock(); |
1556 | ||
f0706e82 | 1557 | /* Add STA entry for the AP */ |
46900298 | 1558 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1559 | if (!sta) { |
ddf4ac53 | 1560 | newsta = true; |
d0709a65 | 1561 | |
46900298 | 1562 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1563 | if (!sta) { |
1564 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1565 | " the AP\n", sdata->dev->name); |
d0709a65 | 1566 | rcu_read_unlock(); |
f0706e82 JB |
1567 | return; |
1568 | } | |
f709fc69 | 1569 | |
60f8b39c JB |
1570 | /* update new sta with its last rx activity */ |
1571 | sta->last_rx = jiffies; | |
f709fc69 | 1572 | } |
f709fc69 | 1573 | |
60f8b39c JB |
1574 | /* |
1575 | * FIXME: Do we really need to update the sta_info's information here? | |
1576 | * We already know about the AP (we found it in our list) so it | |
1577 | * should already be filled with the right info, no? | |
1578 | * As is stands, all this is racy because typically we assume | |
1579 | * the information that is filled in here (except flags) doesn't | |
1580 | * change while a STA structure is alive. As such, it should move | |
1581 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1582 | */ | |
f709fc69 | 1583 | |
60f8b39c JB |
1584 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1585 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1586 | |
60f8b39c JB |
1587 | rates = 0; |
1588 | basic_rates = 0; | |
1589 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1590 | |
60f8b39c JB |
1591 | for (i = 0; i < elems.supp_rates_len; i++) { |
1592 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1593 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1594 | |
60f8b39c JB |
1595 | if (rate > 110) |
1596 | have_higher_than_11mbit = true; | |
1597 | ||
1598 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1599 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1600 | rates |= BIT(j); |
d61272cb TW |
1601 | if (is_basic) |
1602 | basic_rates |= BIT(j); | |
1603 | break; | |
1604 | } | |
f709fc69 | 1605 | } |
f709fc69 LCC |
1606 | } |
1607 | ||
60f8b39c JB |
1608 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1609 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1610 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1611 | |
60f8b39c JB |
1612 | if (rate > 110) |
1613 | have_higher_than_11mbit = true; | |
f0706e82 | 1614 | |
60f8b39c | 1615 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1616 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1617 | rates |= BIT(j); |
d61272cb TW |
1618 | if (is_basic) |
1619 | basic_rates |= BIT(j); | |
1620 | break; | |
1621 | } | |
60f8b39c | 1622 | } |
1ebebea8 | 1623 | } |
f0706e82 | 1624 | |
323ce79a | 1625 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1626 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1627 | |
1628 | /* cf. IEEE 802.11 9.2.12 */ | |
1629 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1630 | have_higher_than_11mbit) | |
1631 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1632 | else | |
1633 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1634 | |
e65c2263 S |
1635 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1636 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1637 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1638 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1639 | |
1640 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1641 | |
4b7679a5 | 1642 | rate_control_rate_init(sta); |
f0706e82 | 1643 | |
46900298 | 1644 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1645 | set_sta_flags(sta, WLAN_STA_MFP); |
1646 | ||
ddf4ac53 | 1647 | if (elems.wmm_param) |
60f8b39c | 1648 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1649 | |
1650 | if (newsta) { | |
1651 | int err = sta_info_insert(sta); | |
1652 | if (err) { | |
1653 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1654 | " the AP (error %d)\n", sdata->dev->name, err); | |
1655 | rcu_read_unlock(); | |
1656 | return; | |
1657 | } | |
1658 | } | |
1659 | ||
1660 | rcu_read_unlock(); | |
1661 | ||
1662 | if (elems.wmm_param) | |
46900298 | 1663 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1664 | elems.wmm_param_len); |
aa837e1d JB |
1665 | else |
1666 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1667 | |
ae5eb026 | 1668 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1669 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1670 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1671 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1672 | ap_ht_cap_flags); | |
1673 | ||
60f8b39c JB |
1674 | /* set AID and assoc capability, |
1675 | * ieee80211_set_associated() will tell the driver */ | |
1676 | bss_conf->aid = aid; | |
1677 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1678 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1679 | |
15b7b062 KV |
1680 | /* |
1681 | * initialise the time of last beacon to be the association time, | |
1682 | * otherwise beacon loss check will trigger immediately | |
1683 | */ | |
1684 | ifmgd->last_beacon = jiffies; | |
1685 | ||
46900298 | 1686 | ieee80211_associated(sdata); |
6039f6d2 | 1687 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1688 | } |
1689 | ||
1690 | ||
98c8fccf JB |
1691 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1692 | struct ieee80211_mgmt *mgmt, | |
1693 | size_t len, | |
1694 | struct ieee80211_rx_status *rx_status, | |
1695 | struct ieee802_11_elems *elems, | |
1696 | bool beacon) | |
1697 | { | |
1698 | struct ieee80211_local *local = sdata->local; | |
1699 | int freq; | |
c2b13452 | 1700 | struct ieee80211_bss *bss; |
98c8fccf | 1701 | struct ieee80211_channel *channel; |
98c8fccf JB |
1702 | |
1703 | if (elems->ds_params && elems->ds_params_len == 1) | |
1704 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1705 | else | |
1706 | freq = rx_status->freq; | |
1707 | ||
1708 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1709 | ||
1710 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1711 | return; | |
1712 | ||
98c8fccf | 1713 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1714 | channel, beacon); |
98c8fccf JB |
1715 | if (!bss) |
1716 | return; | |
1717 | ||
c481ec97 | 1718 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1719 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1720 | struct ieee80211_channel_sw_ie *sw_elem = |
1721 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1722 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1723 | } | |
1724 | ||
3e122be0 | 1725 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1726 | } |
1727 | ||
1728 | ||
f698d856 | 1729 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1730 | struct ieee80211_mgmt *mgmt, |
1731 | size_t len, | |
1732 | struct ieee80211_rx_status *rx_status) | |
1733 | { | |
15b7b062 | 1734 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1735 | size_t baselen; |
1736 | struct ieee802_11_elems elems; | |
1737 | ||
15b7b062 KV |
1738 | ifmgd = &sdata->u.mgd; |
1739 | ||
8e7cdbb6 TW |
1740 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1741 | return; /* ignore ProbeResp to foreign address */ | |
1742 | ||
ae6a44e3 EK |
1743 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1744 | if (baselen > len) | |
1745 | return; | |
1746 | ||
1747 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1748 | &elems); | |
1749 | ||
98c8fccf | 1750 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1751 | |
1752 | /* direct probe may be part of the association flow */ | |
16cf438a | 1753 | if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
9859b81e RR |
1754 | printk(KERN_DEBUG "%s direct probe responded\n", |
1755 | sdata->dev->name); | |
46900298 | 1756 | ieee80211_authenticate(sdata); |
9859b81e | 1757 | } |
15b7b062 KV |
1758 | |
1759 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1760 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1761 | } |
1762 | ||
d91f36db JB |
1763 | /* |
1764 | * This is the canonical list of information elements we care about, | |
1765 | * the filter code also gives us all changes to the Microsoft OUI | |
1766 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1767 | * | |
1768 | * We implement beacon filtering in software since that means we can | |
1769 | * avoid processing the frame here and in cfg80211, and userspace | |
1770 | * will not be able to tell whether the hardware supports it or not. | |
1771 | * | |
1772 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1773 | * add items it requires. It also needs to be able to tell us to | |
1774 | * look out for other vendor IEs. | |
1775 | */ | |
1776 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1777 | (1ULL << WLAN_EID_COUNTRY) | |
1778 | (1ULL << WLAN_EID_ERP_INFO) | | |
1779 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1780 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1781 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1782 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1783 | |
f698d856 | 1784 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1785 | struct ieee80211_mgmt *mgmt, |
1786 | size_t len, | |
1787 | struct ieee80211_rx_status *rx_status) | |
1788 | { | |
d91f36db | 1789 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1790 | size_t baselen; |
1791 | struct ieee802_11_elems elems; | |
f698d856 | 1792 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1793 | u32 changed = 0; |
d91f36db | 1794 | bool erp_valid, directed_tim = false; |
7a5158ef | 1795 | u8 erp_value = 0; |
d91f36db | 1796 | u32 ncrc; |
f0706e82 | 1797 | |
ae6a44e3 EK |
1798 | /* Process beacon from the current BSS */ |
1799 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1800 | if (baselen > len) | |
1801 | return; | |
1802 | ||
d91f36db | 1803 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1804 | return; |
f0706e82 | 1805 | |
46900298 JB |
1806 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1807 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1808 | return; |
1809 | ||
d91f36db JB |
1810 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1811 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1812 | len - baselen, &elems, | |
1813 | care_about_ies, ncrc); | |
1814 | ||
1815 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1816 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1817 | ifmgd->aid); | |
d91f36db JB |
1818 | |
1819 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1820 | ||
1821 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1822 | return; |
d91f36db JB |
1823 | ifmgd->beacon_crc = ncrc; |
1824 | ||
1825 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1826 | |
46900298 | 1827 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1828 | elems.wmm_param_len); |
1829 | ||
25c9c875 | 1830 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1831 | if (directed_tim) { |
572e0012 KV |
1832 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1833 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1834 | ieee80211_hw_config(local, | |
1835 | IEEE80211_CONF_CHANGE_PS); | |
1836 | ieee80211_send_nullfunc(local, sdata, 0); | |
1837 | } else { | |
1838 | local->pspolling = true; | |
1839 | ||
1840 | /* | |
1841 | * Here is assumed that the driver will be | |
1842 | * able to send ps-poll frame and receive a | |
1843 | * response even though power save mode is | |
1844 | * enabled, but some drivers might require | |
1845 | * to disable power save here. This needs | |
1846 | * to be investigated. | |
1847 | */ | |
1848 | ieee80211_send_pspoll(local, sdata); | |
1849 | } | |
a97b77b9 VN |
1850 | } |
1851 | } | |
7a5158ef JB |
1852 | |
1853 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1854 | erp_valid = true; | |
1855 | erp_value = elems.erp_info[0]; | |
1856 | } else { | |
1857 | erp_valid = false; | |
50c4afb9 | 1858 | } |
7a5158ef JB |
1859 | changed |= ieee80211_handle_bss_capability(sdata, |
1860 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1861 | erp_valid, erp_value); | |
f0706e82 | 1862 | |
d3c990fb | 1863 | |
53d6f81c | 1864 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1865 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1866 | struct sta_info *sta; |
1867 | struct ieee80211_supported_band *sband; | |
1868 | u16 ap_ht_cap_flags; | |
1869 | ||
1870 | rcu_read_lock(); | |
1871 | ||
46900298 | 1872 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1873 | if (!sta) { |
1874 | rcu_read_unlock(); | |
1875 | return; | |
1876 | } | |
1877 | ||
1878 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1879 | ||
1880 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1881 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1882 | ||
1883 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1884 | ||
1885 | rcu_read_unlock(); | |
1886 | ||
1887 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1888 | ap_ht_cap_flags); | |
d3c990fb RR |
1889 | } |
1890 | ||
3f2355cb LR |
1891 | if (elems.country_elem) { |
1892 | /* Note we are only reviewing this on beacons | |
1893 | * for the BSSID we are associated to */ | |
1894 | regulatory_hint_11d(local->hw.wiphy, | |
1895 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1896 | |
1897 | /* TODO: IBSS also needs this */ | |
1898 | if (elems.pwr_constr_elem) | |
1899 | ieee80211_handle_pwr_constr(sdata, | |
1900 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1901 | elems.pwr_constr_elem, | |
1902 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1903 | } |
1904 | ||
471b3efd | 1905 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1906 | } |
1907 | ||
46900298 JB |
1908 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1909 | struct sk_buff *skb, | |
1910 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1911 | { |
f698d856 | 1912 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1913 | struct ieee80211_mgmt *mgmt; |
1914 | u16 fc; | |
1915 | ||
1916 | if (skb->len < 24) | |
46900298 | 1917 | return RX_DROP_MONITOR; |
f0706e82 JB |
1918 | |
1919 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1920 | fc = le16_to_cpu(mgmt->frame_control); | |
1921 | ||
1922 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1923 | case IEEE80211_STYPE_PROBE_REQ: | |
1924 | case IEEE80211_STYPE_PROBE_RESP: | |
1925 | case IEEE80211_STYPE_BEACON: | |
1926 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1927 | case IEEE80211_STYPE_AUTH: | |
1928 | case IEEE80211_STYPE_ASSOC_RESP: | |
1929 | case IEEE80211_STYPE_REASSOC_RESP: | |
1930 | case IEEE80211_STYPE_DEAUTH: | |
1931 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1932 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1933 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1934 | return RX_QUEUED; | |
f0706e82 JB |
1935 | } |
1936 | ||
46900298 | 1937 | return RX_DROP_MONITOR; |
f0706e82 JB |
1938 | } |
1939 | ||
f698d856 | 1940 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1941 | struct sk_buff *skb) |
1942 | { | |
1943 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1944 | struct ieee80211_mgmt *mgmt; |
1945 | u16 fc; | |
1946 | ||
f0706e82 JB |
1947 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1948 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1949 | fc = le16_to_cpu(mgmt->frame_control); | |
1950 | ||
46900298 JB |
1951 | switch (fc & IEEE80211_FCTL_STYPE) { |
1952 | case IEEE80211_STYPE_PROBE_RESP: | |
1953 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1954 | rx_status); | |
1955 | break; | |
1956 | case IEEE80211_STYPE_BEACON: | |
1957 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1958 | rx_status); | |
1959 | break; | |
1960 | case IEEE80211_STYPE_AUTH: | |
1961 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1962 | break; | |
1963 | case IEEE80211_STYPE_ASSOC_RESP: | |
1964 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1965 | break; | |
1966 | case IEEE80211_STYPE_REASSOC_RESP: | |
1967 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1968 | break; | |
1969 | case IEEE80211_STYPE_DEAUTH: | |
1970 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1971 | break; | |
1972 | case IEEE80211_STYPE_DISASSOC: | |
1973 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1974 | break; | |
f0706e82 JB |
1975 | } |
1976 | ||
1977 | kfree_skb(skb); | |
1978 | } | |
1979 | ||
9c6bd790 | 1980 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1981 | { |
60f8b39c JB |
1982 | struct ieee80211_sub_if_data *sdata = |
1983 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1984 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1985 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1986 | |
46900298 JB |
1987 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1988 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1989 | } |
1990 | ||
46900298 | 1991 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1992 | { |
46900298 | 1993 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1994 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1995 | |
24487981 JB |
1996 | /* Reset own TSF to allow time synchronization work. */ |
1997 | drv_reset_tsf(local); | |
f0706e82 | 1998 | |
46900298 | 1999 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
2000 | |
2001 | ||
46900298 JB |
2002 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
2003 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
2004 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2005 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2006 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2007 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
2008 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
2009 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 2010 | else |
46900298 JB |
2011 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
2012 | ifmgd->auth_transaction = -1; | |
2013 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2014 | ifmgd->assoc_scan_tries = 0; | |
2015 | ifmgd->direct_probe_tries = 0; | |
2016 | ifmgd->auth_tries = 0; | |
2017 | ifmgd->assoc_tries = 0; | |
24e64622 | 2018 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2019 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2020 | } |
2021 | ||
46900298 | 2022 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2023 | { |
46900298 | 2024 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2025 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2026 | struct ieee80211_bss *bss; |
46900298 JB |
2027 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2028 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2029 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2030 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2031 | struct ieee80211_channel *chan = local->oper_channel; | |
2032 | ||
636a5d36 JM |
2033 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2034 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2035 | IEEE80211_STA_AUTO_BSSID_SEL | |
2036 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2037 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2038 | if (sdata->default_key) | |
2039 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2040 | } |
9d139c81 | 2041 | |
46900298 | 2042 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2043 | chan = NULL; |
2044 | ||
46900298 | 2045 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2046 | bssid = NULL; |
2047 | ||
46900298 | 2048 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2049 | ssid = NULL; |
2050 | ssid_len = 0; | |
2051 | } | |
2052 | ||
2053 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2054 | bssid, ssid, ssid_len, | |
2055 | capa_mask, capa_val); | |
2056 | ||
2057 | if (bss) { | |
2058 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2059 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2060 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2061 | bss->ssid_len); | |
2062 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2063 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2064 | bss->supp_rates); | |
46900298 JB |
2065 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2066 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2067 | else |
46900298 | 2068 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2069 | |
9c6bd790 JB |
2070 | /* Send out direct probe if no probe resp was received or |
2071 | * the one we have is outdated | |
2072 | */ | |
00d3f14c JB |
2073 | if (!bss->last_probe_resp || |
2074 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2075 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2076 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2077 | else |
46900298 | 2078 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2079 | |
00d3f14c | 2080 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2081 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2082 | return 0; |
2083 | } else { | |
46900298 | 2084 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 | 2085 | |
46900298 | 2086 | ifmgd->assoc_scan_tries++; |
af88b907 | 2087 | |
f3b85252 JB |
2088 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2089 | ssid_len); | |
af88b907 | 2090 | |
46900298 JB |
2091 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2092 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2093 | } else { |
46900298 JB |
2094 | ifmgd->assoc_scan_tries = 0; |
2095 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 2096 | ieee80211_recalc_idle(local); |
e374055a | 2097 | } |
9c6bd790 JB |
2098 | } |
2099 | return -1; | |
2100 | } | |
2101 | ||
2102 | ||
2103 | static void ieee80211_sta_work(struct work_struct *work) | |
2104 | { | |
2105 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2106 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2107 | struct ieee80211_local *local = sdata->local; |
46900298 | 2108 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2109 | struct sk_buff *skb; |
2110 | ||
2111 | if (!netif_running(sdata->dev)) | |
2112 | return; | |
2113 | ||
c2b13452 | 2114 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2115 | return; |
2116 | ||
46900298 | 2117 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2118 | return; |
46900298 | 2119 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2120 | |
46900298 | 2121 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2122 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2123 | ||
46900298 JB |
2124 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2125 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2126 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2127 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2128 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2129 | round_jiffies_relative(0)); | |
9c6bd790 | 2130 | return; |
f0706e82 JB |
2131 | } |
2132 | ||
46900298 JB |
2133 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2134 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2135 | return; |
46900298 JB |
2136 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2137 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2138 | return; |
d6f2da5b | 2139 | |
5cff20e6 JB |
2140 | ieee80211_recalc_idle(local); |
2141 | ||
46900298 | 2142 | switch (ifmgd->state) { |
9c6bd790 JB |
2143 | case IEEE80211_STA_MLME_DISABLED: |
2144 | break; | |
2145 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2146 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2147 | break; |
2148 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2149 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2150 | break; |
2151 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2152 | ieee80211_associate(sdata); |
9c6bd790 JB |
2153 | break; |
2154 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2155 | ieee80211_associated(sdata); |
9c6bd790 JB |
2156 | break; |
2157 | default: | |
2158 | WARN_ON(1); | |
2159 | break; | |
2160 | } | |
2161 | ||
46900298 | 2162 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2163 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2164 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2165 | ||
46900298 | 2166 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2167 | WLAN_REASON_UNSPECIFIED); |
2168 | } | |
f0706e82 JB |
2169 | } |
2170 | ||
9c6bd790 JB |
2171 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2172 | { | |
ad935687 KV |
2173 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2174 | /* | |
2175 | * Need to update last_beacon to avoid beacon loss | |
2176 | * test to trigger. | |
2177 | */ | |
2178 | sdata->u.mgd.last_beacon = jiffies; | |
2179 | ||
2180 | ||
9c6bd790 | 2181 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2182 | &sdata->u.mgd.work); |
ad935687 | 2183 | } |
9c6bd790 | 2184 | } |
f0706e82 | 2185 | |
9c6bd790 JB |
2186 | /* interface setup */ |
2187 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2188 | { |
46900298 | 2189 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2190 | u32 hw_flags; |
988c0f72 | 2191 | |
46900298 JB |
2192 | ifmgd = &sdata->u.mgd; |
2193 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2194 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2195 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2196 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2197 | (unsigned long) sdata); |
46900298 | 2198 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2199 | (unsigned long) sdata); |
46900298 | 2200 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2201 | |
46900298 JB |
2202 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2203 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2204 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2205 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2206 | IEEE80211_STA_AUTO_BSSID_SEL | |
2207 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2208 | if (sdata->local->hw.queues >= 4) |
46900298 | 2209 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2210 | |
2211 | hw_flags = sdata->local->hw.flags; | |
2212 | ||
2213 | if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { | |
2214 | ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; | |
2215 | sdata->local->hw.conf.dynamic_ps_timeout = 500; | |
2216 | } | |
f0706e82 JB |
2217 | } |
2218 | ||
9c6bd790 | 2219 | /* configuration hooks */ |
46900298 | 2220 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2221 | { |
46900298 | 2222 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2223 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2224 | |
46900298 | 2225 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2226 | return; |
60f8b39c | 2227 | |
46900298 | 2228 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2229 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2230 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2231 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2232 | |
46900298 JB |
2233 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2234 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2235 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2236 | |
636a5d36 JM |
2237 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2238 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2239 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2240 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2241 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2242 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2243 | } |
2244 | } | |
60f8b39c | 2245 | |
79f6440c AF |
2246 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2247 | { | |
2248 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2249 | ||
79f6440c AF |
2250 | if (ifmgd->ssid_len) |
2251 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2252 | else | |
2253 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2254 | ||
2255 | return 0; | |
2256 | } | |
2257 | ||
9c6bd790 JB |
2258 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2259 | { | |
46900298 | 2260 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2261 | |
9c6bd790 JB |
2262 | if (len > IEEE80211_MAX_SSID_LEN) |
2263 | return -EINVAL; | |
2264 | ||
46900298 | 2265 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2266 | |
46900298 | 2267 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2268 | /* |
2269 | * Do not use reassociation if SSID is changed (different ESS). | |
2270 | */ | |
2271 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2272 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2273 | memcpy(ifmgd->ssid, ssid, len); | |
2274 | ifmgd->ssid_len = len; | |
60f8b39c | 2275 | } |
60f8b39c | 2276 | |
79f6440c | 2277 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2278 | } |
2279 | ||
2280 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2281 | { | |
46900298 JB |
2282 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2283 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2284 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2285 | return 0; |
2286 | } | |
2287 | ||
2288 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2289 | { | |
46900298 | 2290 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2291 | |
dfe67012 | 2292 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2293 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2294 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2295 | } else { |
46900298 JB |
2296 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2297 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2298 | } |
2299 | ||
2d0ddec5 JB |
2300 | if (netif_running(sdata->dev)) |
2301 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
60f8b39c | 2302 | |
79f6440c | 2303 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2304 | } |
2305 | ||
636a5d36 JM |
2306 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2307 | const char *ie, size_t len) | |
9c6bd790 | 2308 | { |
46900298 | 2309 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2310 | |
46900298 | 2311 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2312 | if (len == 0) { |
46900298 JB |
2313 | ifmgd->extra_ie = NULL; |
2314 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2315 | return 0; |
60f8b39c | 2316 | } |
46900298 JB |
2317 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2318 | if (!ifmgd->extra_ie) { | |
2319 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2320 | return -ENOMEM; |
2321 | } | |
46900298 JB |
2322 | memcpy(ifmgd->extra_ie, ie, len); |
2323 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2324 | return 0; |
60f8b39c JB |
2325 | } |
2326 | ||
f698d856 | 2327 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2328 | { |
f4ea83dd | 2329 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2330 | sdata->dev->name, reason); |
f0706e82 | 2331 | |
46900298 | 2332 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2333 | return 0; |
2334 | } | |
2335 | ||
f698d856 | 2336 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2337 | { |
46900298 | 2338 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2339 | |
f4ea83dd | 2340 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2341 | sdata->dev->name, reason); |
f0706e82 | 2342 | |
46900298 JB |
2343 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2344 | return -ENOLINK; | |
f0706e82 | 2345 | |
46900298 | 2346 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2347 | return 0; |
2348 | } | |
84363e6e | 2349 | |
9c6bd790 JB |
2350 | /* scan finished notification */ |
2351 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2352 | { | |
2353 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2354 | |
2355 | /* Restart STA timers */ | |
2356 | rcu_read_lock(); | |
2357 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2358 | ieee80211_restart_sta_timer(sdata); | |
2359 | rcu_read_unlock(); | |
2360 | } | |
10f644a4 JB |
2361 | |
2362 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2363 | unsigned long data, void *dummy) | |
2364 | { | |
2365 | s32 latency_usec = (s32) data; | |
2366 | struct ieee80211_local *local = | |
2367 | container_of(nb, struct ieee80211_local, | |
2368 | network_latency_notifier); | |
2369 | ||
2370 | mutex_lock(&local->iflist_mtx); | |
2371 | ieee80211_recalc_ps(local, latency_usec); | |
2372 | mutex_unlock(&local->iflist_mtx); | |
2373 | ||
2374 | return 0; | |
2375 | } |