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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> |
f0706e82 | 20 | #include <net/mac80211.h> |
472dbc45 | 21 | #include <asm/unaligned.h> |
60f8b39c | 22 | |
f0706e82 | 23 | #include "ieee80211_i.h" |
2c8dccc7 JB |
24 | #include "rate.h" |
25 | #include "led.h" | |
f0706e82 | 26 | |
6042a3e3 | 27 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
28 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
29 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
30 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
31 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
32 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
15b7b062 | 33 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 34 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 35 | |
5484e237 JB |
36 | /* utils */ |
37 | static int ecw2cw(int ecw) | |
60f8b39c | 38 | { |
5484e237 | 39 | return (1 << ecw) - 1; |
60f8b39c JB |
40 | } |
41 | ||
c2b13452 | 42 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
43 | { |
44 | u8 *end, *pos; | |
45 | ||
00d3f14c | 46 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
47 | if (pos == NULL) |
48 | return NULL; | |
00d3f14c | 49 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
50 | |
51 | while (pos + 1 < end) { | |
52 | if (pos + 2 + pos[1] > end) | |
53 | break; | |
54 | if (pos[0] == ie) | |
55 | return pos; | |
56 | pos += 2 + pos[1]; | |
57 | } | |
58 | ||
59 | return NULL; | |
60 | } | |
61 | ||
c2b13452 | 62 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 63 | struct ieee80211_supported_band *sband, |
881d948c | 64 | u32 *rates) |
9ac19a90 JB |
65 | { |
66 | int i, j, count; | |
67 | *rates = 0; | |
68 | count = 0; | |
69 | for (i = 0; i < bss->supp_rates_len; i++) { | |
70 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
71 | ||
72 | for (j = 0; j < sband->n_bitrates; j++) | |
73 | if (sband->bitrates[j].bitrate == rate) { | |
74 | *rates |= BIT(j); | |
75 | count++; | |
76 | break; | |
77 | } | |
78 | } | |
79 | ||
80 | return count; | |
81 | } | |
82 | ||
d5522e03 JB |
83 | /* |
84 | * ieee80211_enable_ht should be called only after the operating band | |
85 | * has been determined as ht configuration depends on the hw's | |
86 | * HT abilities for a specific band. | |
87 | */ | |
88 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
89 | struct ieee80211_ht_info *hti, | |
90 | u16 ap_ht_cap_flags) | |
91 | { | |
92 | struct ieee80211_local *local = sdata->local; | |
93 | struct ieee80211_supported_band *sband; | |
94 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
95 | struct ieee80211_bss_ht_conf ht; | |
96 | struct sta_info *sta; | |
97 | u32 changed = 0; | |
98 | bool enable_ht = true, ht_changed; | |
99 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
100 | ||
101 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
102 | ||
103 | memset(&ht, 0, sizeof(ht)); | |
104 | ||
105 | /* HT is not supported */ | |
106 | if (!sband->ht_cap.ht_supported) | |
107 | enable_ht = false; | |
108 | ||
109 | /* check that channel matches the right operating channel */ | |
110 | if (local->hw.conf.channel->center_freq != | |
111 | ieee80211_channel_to_frequency(hti->control_chan)) | |
112 | enable_ht = false; | |
113 | ||
114 | if (enable_ht) { | |
115 | channel_type = NL80211_CHAN_HT20; | |
116 | ||
117 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
118 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
119 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
120 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
121 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
122 | channel_type = NL80211_CHAN_HT40PLUS; | |
123 | break; | |
124 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
125 | channel_type = NL80211_CHAN_HT40MINUS; | |
126 | break; | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
131 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
132 | channel_type != local->hw.conf.channel_type; | |
133 | ||
134 | local->oper_channel_type = channel_type; | |
135 | ||
136 | if (ht_changed) { | |
137 | /* channel_type change automatically detected */ | |
138 | ieee80211_hw_config(local, 0); | |
139 | ||
140 | rcu_read_lock(); | |
141 | ||
142 | sta = sta_info_get(local, ifmgd->bssid); | |
143 | if (sta) | |
144 | rate_control_rate_update(local, sband, sta, | |
145 | IEEE80211_RC_HT_CHANGED); | |
146 | ||
147 | rcu_read_unlock(); | |
148 | ||
149 | } | |
150 | ||
151 | /* disable HT */ | |
152 | if (!enable_ht) | |
153 | return 0; | |
154 | ||
155 | ht.operation_mode = le16_to_cpu(hti->operation_mode); | |
156 | ||
157 | /* if bss configuration changed store the new one */ | |
158 | if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { | |
159 | changed |= BSS_CHANGED_HT; | |
160 | sdata->vif.bss_conf.ht = ht; | |
161 | } | |
162 | ||
163 | return changed; | |
164 | } | |
165 | ||
9c6bd790 JB |
166 | /* frame sending functions */ |
167 | ||
46900298 | 168 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 169 | { |
46900298 | 170 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
171 | struct ieee80211_local *local = sdata->local; |
172 | struct sk_buff *skb; | |
173 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 174 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
175 | int i, len, count, rates_len, supp_rates_len; |
176 | u16 capab; | |
c2b13452 | 177 | struct ieee80211_bss *bss; |
9ac19a90 JB |
178 | int wmm = 0; |
179 | struct ieee80211_supported_band *sband; | |
881d948c | 180 | u32 rates = 0; |
9ac19a90 JB |
181 | |
182 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 183 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 184 | ifmgd->ssid_len); |
9ac19a90 JB |
185 | if (!skb) { |
186 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
187 | "frame\n", sdata->dev->name); | |
188 | return; | |
189 | } | |
190 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
191 | ||
192 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
193 | ||
46900298 | 194 | capab = ifmgd->capab; |
9ac19a90 JB |
195 | |
196 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
197 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
198 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
199 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
200 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
201 | } | |
202 | ||
46900298 | 203 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 204 | local->hw.conf.channel->center_freq, |
46900298 | 205 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 206 | if (bss) { |
00d3f14c | 207 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
208 | capab |= WLAN_CAPABILITY_PRIVACY; |
209 | if (bss->wmm_used) | |
210 | wmm = 1; | |
211 | ||
212 | /* get all rates supported by the device and the AP as | |
213 | * some APs don't like getting a superset of their rates | |
214 | * in the association request (e.g. D-Link DAP 1353 in | |
215 | * b-only mode) */ | |
216 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
217 | ||
00d3f14c | 218 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
219 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
220 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
221 | ||
222 | ieee80211_rx_bss_put(local, bss); | |
223 | } else { | |
224 | rates = ~0; | |
225 | rates_len = sband->n_bitrates; | |
226 | } | |
227 | ||
228 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
229 | memset(mgmt, 0, 24); | |
46900298 | 230 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 231 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 232 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 233 | |
46900298 | 234 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
235 | skb_put(skb, 10); |
236 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
237 | IEEE80211_STYPE_REASSOC_REQ); | |
238 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
239 | mgmt->u.reassoc_req.listen_interval = | |
240 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 241 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
242 | ETH_ALEN); |
243 | } else { | |
244 | skb_put(skb, 4); | |
245 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
246 | IEEE80211_STYPE_ASSOC_REQ); | |
247 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 248 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
249 | cpu_to_le16(local->hw.conf.listen_interval); |
250 | } | |
251 | ||
252 | /* SSID */ | |
46900298 | 253 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 254 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
255 | *pos++ = ifmgd->ssid_len; |
256 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
257 | |
258 | /* add all rates which were marked to be used above */ | |
259 | supp_rates_len = rates_len; | |
260 | if (supp_rates_len > 8) | |
261 | supp_rates_len = 8; | |
262 | ||
263 | len = sband->n_bitrates; | |
264 | pos = skb_put(skb, supp_rates_len + 2); | |
265 | *pos++ = WLAN_EID_SUPP_RATES; | |
266 | *pos++ = supp_rates_len; | |
267 | ||
268 | count = 0; | |
269 | for (i = 0; i < sband->n_bitrates; i++) { | |
270 | if (BIT(i) & rates) { | |
271 | int rate = sband->bitrates[i].bitrate; | |
272 | *pos++ = (u8) (rate / 5); | |
273 | if (++count == 8) | |
274 | break; | |
275 | } | |
276 | } | |
277 | ||
278 | if (rates_len > count) { | |
279 | pos = skb_put(skb, rates_len - count + 2); | |
280 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
281 | *pos++ = rates_len - count; | |
282 | ||
283 | for (i++; i < sband->n_bitrates; i++) { | |
284 | if (BIT(i) & rates) { | |
285 | int rate = sband->bitrates[i].bitrate; | |
286 | *pos++ = (u8) (rate / 5); | |
287 | } | |
288 | } | |
289 | } | |
290 | ||
291 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
292 | /* 1. power capabilities */ | |
293 | pos = skb_put(skb, 4); | |
294 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
295 | *pos++ = 2; | |
296 | *pos++ = 0; /* min tx power */ | |
297 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
298 | ||
299 | /* 2. supported channels */ | |
300 | /* TODO: get this in reg domain format */ | |
301 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
302 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
303 | *pos++ = 2 * sband->n_channels; | |
304 | for (i = 0; i < sband->n_channels; i++) { | |
305 | *pos++ = ieee80211_frequency_to_channel( | |
306 | sband->channels[i].center_freq); | |
307 | *pos++ = 1; /* one channel in the subband*/ | |
308 | } | |
309 | } | |
310 | ||
46900298 JB |
311 | if (ifmgd->extra_ie) { |
312 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
313 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
314 | } |
315 | ||
46900298 | 316 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
317 | pos = skb_put(skb, 9); |
318 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
319 | *pos++ = 7; /* len */ | |
320 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
321 | *pos++ = 0x50; | |
322 | *pos++ = 0xf2; | |
323 | *pos++ = 2; /* WME */ | |
324 | *pos++ = 0; /* WME info */ | |
325 | *pos++ = 1; /* WME ver */ | |
326 | *pos++ = 0; | |
327 | } | |
328 | ||
329 | /* wmm support is a must to HT */ | |
eb46936b VT |
330 | /* |
331 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
332 | * ciphers in HT mode. We still associate in non-ht | |
333 | * mode (11a/b/g) if any one of these ciphers is | |
334 | * configured as pairwise. | |
335 | */ | |
46900298 | 336 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
337 | sband->ht_cap.ht_supported && |
338 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 339 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 340 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
341 | struct ieee80211_ht_info *ht_info = |
342 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
343 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
344 | __le16 tmp; |
345 | u32 flags = local->hw.conf.channel->flags; | |
346 | ||
d9fe60de JB |
347 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
348 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 349 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 350 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
351 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
352 | } | |
353 | break; | |
d9fe60de | 354 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 355 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 356 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
357 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
358 | } | |
359 | break; | |
360 | } | |
361 | ||
362 | tmp = cpu_to_le16(cap); | |
363 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
364 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
365 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
366 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
367 | memcpy(pos, &tmp, sizeof(u16)); | |
368 | pos += sizeof(u16); | |
369 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
370 | *pos++ = sband->ht_cap.ampdu_factor | |
371 | (sband->ht_cap.ampdu_density << 2); | |
372 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
373 | } |
374 | ||
46900298 JB |
375 | kfree(ifmgd->assocreq_ies); |
376 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
377 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
378 | if (ifmgd->assocreq_ies) | |
379 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 380 | |
e50db65c | 381 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
382 | } |
383 | ||
384 | ||
ef422bc0 JB |
385 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
386 | u16 stype, u16 reason) | |
9ac19a90 JB |
387 | { |
388 | struct ieee80211_local *local = sdata->local; | |
46900298 | 389 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
390 | struct sk_buff *skb; |
391 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 392 | |
65fc73ac | 393 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 394 | if (!skb) { |
ef422bc0 JB |
395 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
396 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
397 | return; |
398 | } | |
399 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
400 | ||
401 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
402 | memset(mgmt, 0, 24); | |
46900298 | 403 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 404 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 405 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 406 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 407 | skb_put(skb, 2); |
ef422bc0 | 408 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
409 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
410 | ||
53b46b84 JM |
411 | if (stype == IEEE80211_STYPE_DEAUTH) |
412 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
413 | else | |
414 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 415 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
416 | } |
417 | ||
572e0012 KV |
418 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
419 | struct ieee80211_sub_if_data *sdata) | |
420 | { | |
46900298 | 421 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
422 | struct ieee80211_pspoll *pspoll; |
423 | struct sk_buff *skb; | |
424 | u16 fc; | |
425 | ||
426 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
427 | if (!skb) { | |
428 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
429 | "pspoll frame\n", sdata->dev->name); | |
430 | return; | |
431 | } | |
432 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
433 | ||
434 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
435 | memset(pspoll, 0, sizeof(*pspoll)); | |
436 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
437 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 438 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
439 | |
440 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
441 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
442 | ||
46900298 | 443 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
444 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
445 | ||
446 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
447 | } |
448 | ||
60f8b39c | 449 | /* MLME */ |
f698d856 | 450 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 451 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
452 | u8 *wmm_param, size_t wmm_param_len) |
453 | { | |
f0706e82 JB |
454 | struct ieee80211_tx_queue_params params; |
455 | size_t left; | |
456 | int count; | |
457 | u8 *pos; | |
458 | ||
46900298 | 459 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
460 | return; |
461 | ||
462 | if (!wmm_param) | |
463 | return; | |
464 | ||
f0706e82 JB |
465 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
466 | return; | |
467 | count = wmm_param[6] & 0x0f; | |
46900298 | 468 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 469 | return; |
46900298 | 470 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
471 | |
472 | pos = wmm_param + 8; | |
473 | left = wmm_param_len - 8; | |
474 | ||
475 | memset(¶ms, 0, sizeof(params)); | |
476 | ||
f0706e82 JB |
477 | local->wmm_acm = 0; |
478 | for (; left >= 4; left -= 4, pos += 4) { | |
479 | int aci = (pos[0] >> 5) & 0x03; | |
480 | int acm = (pos[0] >> 4) & 0x01; | |
481 | int queue; | |
482 | ||
483 | switch (aci) { | |
0eeb59fe | 484 | case 1: /* AC_BK */ |
e100bb64 | 485 | queue = 3; |
988c0f72 | 486 | if (acm) |
0eeb59fe | 487 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 488 | break; |
0eeb59fe | 489 | case 2: /* AC_VI */ |
e100bb64 | 490 | queue = 1; |
988c0f72 | 491 | if (acm) |
0eeb59fe | 492 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 493 | break; |
0eeb59fe | 494 | case 3: /* AC_VO */ |
e100bb64 | 495 | queue = 0; |
988c0f72 | 496 | if (acm) |
0eeb59fe | 497 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 498 | break; |
0eeb59fe | 499 | case 0: /* AC_BE */ |
f0706e82 | 500 | default: |
e100bb64 | 501 | queue = 2; |
988c0f72 | 502 | if (acm) |
0eeb59fe | 503 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
504 | break; |
505 | } | |
506 | ||
507 | params.aifs = pos[0] & 0x0f; | |
508 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
509 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 510 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 511 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 512 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 513 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 514 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
515 | params.cw_max, params.txop); |
516 | #endif | |
0eeb59fe JM |
517 | if (local->ops->conf_tx && |
518 | local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
f0706e82 | 519 | printk(KERN_DEBUG "%s: failed to set TX queue " |
f698d856 | 520 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
521 | } |
522 | } | |
523 | } | |
524 | ||
1fb3606b | 525 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) |
a97b77b9 VN |
526 | { |
527 | u8 mask; | |
528 | u8 index, indexn1, indexn2; | |
529 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
530 | ||
60375541 JB |
531 | if (unlikely(!tim || elems->tim_len < 4)) |
532 | return false; | |
533 | ||
a97b77b9 VN |
534 | aid &= 0x3fff; |
535 | index = aid / 8; | |
536 | mask = 1 << (aid & 7); | |
537 | ||
a97b77b9 VN |
538 | indexn1 = tim->bitmap_ctrl & 0xfe; |
539 | indexn2 = elems->tim_len + indexn1 - 4; | |
540 | ||
541 | if (index < indexn1 || index > indexn2) | |
542 | return false; | |
543 | ||
544 | index -= indexn1; | |
545 | ||
546 | return !!(tim->virtual_map[index] & mask); | |
547 | } | |
548 | ||
7a5158ef JB |
549 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
550 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 551 | { |
bda3933a | 552 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 553 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 554 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 555 | #endif |
471b3efd | 556 | u32 changed = 0; |
7a5158ef JB |
557 | bool use_protection; |
558 | bool use_short_preamble; | |
559 | bool use_short_slot; | |
560 | ||
561 | if (erp_valid) { | |
562 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
563 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
564 | } else { | |
565 | use_protection = false; | |
566 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
567 | } | |
568 | ||
569 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 570 | |
471b3efd | 571 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 572 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 573 | if (net_ratelimit()) { |
0c68ae26 | 574 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 575 | sdata->dev->name, |
5628221c | 576 | use_protection ? "enabled" : "disabled", |
46900298 | 577 | ifmgd->bssid); |
5628221c | 578 | } |
f4ea83dd | 579 | #endif |
471b3efd JB |
580 | bss_conf->use_cts_prot = use_protection; |
581 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 582 | } |
7e9ed188 | 583 | |
d43c7b37 | 584 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 585 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
586 | if (net_ratelimit()) { |
587 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 588 | " (BSSID=%pM)\n", |
471b3efd | 589 | sdata->dev->name, |
d43c7b37 | 590 | use_short_preamble ? "short" : "long", |
46900298 | 591 | ifmgd->bssid); |
7e9ed188 | 592 | } |
f4ea83dd | 593 | #endif |
d43c7b37 | 594 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 595 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 596 | } |
d9430a32 | 597 | |
7a5158ef JB |
598 | if (use_short_slot != bss_conf->use_short_slot) { |
599 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
600 | if (net_ratelimit()) { | |
391429c1 CL |
601 | printk(KERN_DEBUG "%s: switched to %s slot time" |
602 | " (BSSID=%pM)\n", | |
7a5158ef JB |
603 | sdata->dev->name, |
604 | use_short_slot ? "short" : "long", | |
46900298 | 605 | ifmgd->bssid); |
7a5158ef JB |
606 | } |
607 | #endif | |
608 | bss_conf->use_short_slot = use_short_slot; | |
609 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
610 | } |
611 | ||
612 | return changed; | |
613 | } | |
614 | ||
46900298 | 615 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
616 | { |
617 | union iwreq_data wrqu; | |
46900298 | 618 | |
f5e5bf25 | 619 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
620 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
621 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
622 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
623 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
624 | } | |
625 | ||
46900298 | 626 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 627 | { |
46900298 | 628 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
629 | char *buf; |
630 | size_t len; | |
631 | int i; | |
f0706e82 JB |
632 | union iwreq_data wrqu; |
633 | ||
46900298 | 634 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
635 | return; |
636 | ||
46900298 JB |
637 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
638 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
639 | if (!buf) |
640 | return; | |
641 | ||
642 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 643 | if (ifmgd->assocreq_ies) { |
74af0250 | 644 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 645 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 646 | len += sprintf(buf + len, "%02x", |
46900298 | 647 | ifmgd->assocreq_ies[i]); |
74af0250 | 648 | } |
f0706e82 | 649 | } |
46900298 JB |
650 | if (ifmgd->assocresp_ies) { |
651 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
652 | len += sprintf(buf + len, " "); |
653 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 654 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 655 | len += sprintf(buf + len, "%02x", |
46900298 | 656 | ifmgd->assocresp_ies[i]); |
74af0250 | 657 | } |
f0706e82 | 658 | } |
74af0250 LT |
659 | len += sprintf(buf + len, ")"); |
660 | ||
661 | if (len > IW_CUSTOM_MAX) { | |
662 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 663 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 664 | len += sprintf(buf + len, "%02x", |
46900298 | 665 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
666 | } |
667 | } | |
668 | ||
ad788b5e JL |
669 | if (len <= IW_CUSTOM_MAX) { |
670 | memset(&wrqu, 0, sizeof(wrqu)); | |
671 | wrqu.data.length = len; | |
672 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
673 | } | |
74af0250 LT |
674 | |
675 | kfree(buf); | |
f0706e82 JB |
676 | } |
677 | ||
678 | ||
f698d856 | 679 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 680 | u32 bss_info_changed) |
f0706e82 | 681 | { |
46900298 | 682 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 683 | struct ieee80211_local *local = sdata->local; |
38668c05 | 684 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 685 | |
c2b13452 | 686 | struct ieee80211_bss *bss; |
d6f2da5b | 687 | |
ae5eb026 | 688 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 689 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 690 | |
46900298 | 691 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 692 | conf->channel->center_freq, |
46900298 | 693 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
694 | if (bss) { |
695 | /* set timing information */ | |
00d3f14c JB |
696 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
697 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 698 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 699 | |
ae5eb026 | 700 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 701 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 702 | |
04de8381 KV |
703 | cfg80211_hold_bss(&bss->cbss); |
704 | ||
9ac19a90 | 705 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
706 | } |
707 | ||
46900298 JB |
708 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
709 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
710 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 711 | |
46900298 | 712 | ifmgd->last_probe = jiffies; |
9ac19a90 | 713 | ieee80211_led_assoc(local, 1); |
9306102e | 714 | |
bda3933a | 715 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
716 | /* |
717 | * For now just always ask the driver to update the basic rateset | |
718 | * when we have associated, we aren't checking whether it actually | |
719 | * changed or not. | |
720 | */ | |
ae5eb026 JB |
721 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
722 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 723 | |
4be8c387 JB |
724 | if (local->powersave) { |
725 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
726 | local->hw.conf.dynamic_ps_timeout > 0) { | |
520eb820 | 727 | mod_timer(&local->dynamic_ps_timer, jiffies + |
46f2c4bd JB |
728 | msecs_to_jiffies( |
729 | local->hw.conf.dynamic_ps_timeout)); | |
4be8c387 JB |
730 | } else { |
731 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
732 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 733 | conf->flags |= IEEE80211_CONF_PS; |
4be8c387 | 734 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
520eb820 | 735 | } |
e0cb686f KV |
736 | } |
737 | ||
9ac19a90 JB |
738 | netif_tx_start_all_queues(sdata->dev); |
739 | netif_carrier_on(sdata->dev); | |
f0706e82 | 740 | |
46900298 | 741 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
742 | } |
743 | ||
46900298 | 744 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 745 | { |
46900298 | 746 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 747 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
748 | |
749 | ifmgd->direct_probe_tries++; | |
750 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 751 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
752 | sdata->dev->name, ifmgd->bssid); |
753 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
754 | ieee80211_sta_send_apinfo(sdata); | |
7a947080 VT |
755 | |
756 | /* | |
757 | * Most likely AP is not in the range so remove the | |
758 | * bss information associated to the AP | |
759 | */ | |
46900298 | 760 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 761 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 762 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
763 | |
764 | /* | |
765 | * We might have a pending scan which had no chance to run yet | |
766 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
767 | * Hence, queue the STAs work again | |
768 | */ | |
769 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
770 | return; |
771 | } | |
f0706e82 | 772 | |
0c68ae26 | 773 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
774 | sdata->dev->name, ifmgd->bssid, |
775 | ifmgd->direct_probe_tries); | |
f0706e82 | 776 | |
46900298 | 777 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 778 | |
46900298 | 779 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); |
9ac19a90 JB |
780 | |
781 | /* Direct probe is sent to broadcast address as some APs | |
782 | * will not answer to direct packet in unassociated state. | |
783 | */ | |
784 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 785 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 786 | |
46900298 | 787 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 788 | } |
f0706e82 | 789 | |
9ac19a90 | 790 | |
46900298 | 791 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 792 | { |
46900298 | 793 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 794 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
795 | u8 *ies; |
796 | size_t ies_len; | |
46900298 JB |
797 | |
798 | ifmgd->auth_tries++; | |
799 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 800 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 801 | " timed out\n", |
46900298 JB |
802 | sdata->dev->name, ifmgd->bssid); |
803 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
804 | ieee80211_sta_send_apinfo(sdata); | |
805 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 806 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 807 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
808 | |
809 | /* | |
810 | * We might have a pending scan which had no chance to run yet | |
811 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
812 | * Hence, queue the STAs work again | |
813 | */ | |
814 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
815 | return; |
816 | } | |
f0706e82 | 817 | |
46900298 | 818 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 819 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 820 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 821 | |
636a5d36 JM |
822 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
823 | ies = ifmgd->sme_auth_ie; | |
824 | ies_len = ifmgd->sme_auth_ie_len; | |
825 | } else { | |
826 | ies = NULL; | |
827 | ies_len = 0; | |
828 | } | |
829 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
830 | ifmgd->bssid, 0); |
831 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 832 | |
46900298 | 833 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
834 | } |
835 | ||
5925d976 VN |
836 | /* |
837 | * The disassoc 'reason' argument can be either our own reason | |
838 | * if self disconnected or a reason code from the AP. | |
839 | */ | |
aa458d17 | 840 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
841 | bool deauth, bool self_disconnected, |
842 | u16 reason) | |
aa458d17 | 843 | { |
46900298 | 844 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 845 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
846 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
847 | struct ieee80211_bss *bss; | |
aa458d17 | 848 | struct sta_info *sta; |
e0cb686f | 849 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
850 | |
851 | rcu_read_lock(); | |
852 | ||
46900298 | 853 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
854 | if (!sta) { |
855 | rcu_read_unlock(); | |
856 | return; | |
857 | } | |
858 | ||
859 | if (deauth) { | |
46900298 JB |
860 | ifmgd->direct_probe_tries = 0; |
861 | ifmgd->auth_tries = 0; | |
aa458d17 | 862 | } |
46900298 JB |
863 | ifmgd->assoc_scan_tries = 0; |
864 | ifmgd->assoc_tries = 0; | |
aa458d17 | 865 | |
24e64622 | 866 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
867 | netif_carrier_off(sdata->dev); |
868 | ||
2dace10e | 869 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 870 | |
04de8381 KV |
871 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
872 | conf->channel->center_freq, | |
873 | ifmgd->ssid, ifmgd->ssid_len); | |
874 | ||
875 | if (bss) { | |
876 | cfg80211_unhold_bss(&bss->cbss); | |
877 | ieee80211_rx_bss_put(local, bss); | |
878 | } | |
879 | ||
aa458d17 TW |
880 | if (self_disconnected) { |
881 | if (deauth) | |
ef422bc0 JB |
882 | ieee80211_send_deauth_disassoc(sdata, |
883 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 884 | else |
ef422bc0 JB |
885 | ieee80211_send_deauth_disassoc(sdata, |
886 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
887 | } |
888 | ||
46900298 | 889 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
890 | changed |= ieee80211_reset_erp_info(sdata); |
891 | ||
f5e5bf25 | 892 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
893 | changed |= BSS_CHANGED_ASSOC; |
894 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 895 | |
46900298 | 896 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 897 | |
7a947080 | 898 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
899 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
900 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 901 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 902 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 903 | } |
aa458d17 | 904 | |
aa458d17 TW |
905 | rcu_read_unlock(); |
906 | ||
4797938c | 907 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 908 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 909 | |
a8302de9 VT |
910 | local->power_constr_level = 0; |
911 | ||
520eb820 KV |
912 | del_timer_sync(&local->dynamic_ps_timer); |
913 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
914 | ||
e0cb686f KV |
915 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
916 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
917 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
918 | } | |
ae5eb026 | 919 | |
e0cb686f | 920 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 921 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
922 | |
923 | rcu_read_lock(); | |
924 | ||
46900298 | 925 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
926 | if (!sta) { |
927 | rcu_read_unlock(); | |
928 | return; | |
929 | } | |
930 | ||
931 | sta_info_unlink(&sta); | |
932 | ||
933 | rcu_read_unlock(); | |
934 | ||
935 | sta_info_destroy(sta); | |
aa458d17 | 936 | } |
f0706e82 | 937 | |
9ac19a90 JB |
938 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
939 | { | |
940 | if (!sdata || !sdata->default_key || | |
941 | sdata->default_key->conf.alg != ALG_WEP) | |
942 | return 0; | |
943 | return 1; | |
944 | } | |
945 | ||
46900298 | 946 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 947 | { |
46900298 | 948 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 949 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 950 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
951 | int bss_privacy; |
952 | int wep_privacy; | |
953 | int privacy_invoked; | |
f0706e82 | 954 | |
7986cf95 | 955 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
956 | return 0; |
957 | ||
46900298 | 958 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 959 | local->hw.conf.channel->center_freq, |
46900298 | 960 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
961 | if (!bss) |
962 | return 0; | |
963 | ||
00d3f14c | 964 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 965 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 966 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 967 | |
3e122be0 | 968 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 969 | |
5b98b1f7 JB |
970 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
971 | return 0; | |
972 | ||
973 | return 1; | |
f0706e82 JB |
974 | } |
975 | ||
46900298 | 976 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 977 | { |
46900298 | 978 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 979 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
980 | |
981 | ifmgd->assoc_tries++; | |
982 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 983 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 984 | " timed out\n", |
46900298 JB |
985 | sdata->dev->name, ifmgd->bssid); |
986 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
987 | ieee80211_sta_send_apinfo(sdata); | |
988 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 989 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 990 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
991 | /* |
992 | * We might have a pending scan which had no chance to run yet | |
993 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
994 | * Hence, queue the STAs work again | |
995 | */ | |
996 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
997 | return; |
998 | } | |
999 | ||
46900298 | 1000 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1001 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1002 | sdata->dev->name, ifmgd->bssid); |
1003 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1004 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1005 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1006 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
1007 | return; |
1008 | } | |
1009 | ||
46900298 | 1010 | ieee80211_send_assoc(sdata); |
f0706e82 | 1011 | |
46900298 | 1012 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1013 | } |
1014 | ||
3cf335d5 KV |
1015 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1016 | struct ieee80211_hdr *hdr) | |
1017 | { | |
1018 | /* | |
1019 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1020 | * from AP because we know that the connection is working both ways | |
1021 | * at that time. But multicast frames (and hence also beacons) must | |
1022 | * be ignored here, because we need to trigger the timer during | |
1023 | * data idle periods for sending the periodical probe request to | |
1024 | * the AP. | |
1025 | */ | |
1026 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1027 | mod_timer(&sdata->u.mgd.timer, | |
1028 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1029 | } | |
f0706e82 | 1030 | |
04de8381 KV |
1031 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1032 | { | |
1033 | struct ieee80211_sub_if_data *sdata = | |
1034 | container_of(work, struct ieee80211_sub_if_data, | |
1035 | u.mgd.beacon_loss_work); | |
1036 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1037 | ||
a860402d MB |
1038 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1039 | if (net_ratelimit()) { | |
1040 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1041 | "- sending probe request\n", sdata->dev->name, | |
1042 | sdata->u.mgd.bssid); | |
1043 | } | |
1044 | #endif | |
04de8381 KV |
1045 | |
1046 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1047 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1048 | ifmgd->ssid_len, NULL, 0); | |
1049 | ||
1050 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_MONITORING_INTERVAL); | |
1051 | } | |
1052 | ||
1053 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1054 | { | |
1055 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1056 | ||
1057 | queue_work(sdata->local->hw.workqueue, | |
1058 | &sdata->u.mgd.beacon_loss_work); | |
1059 | } | |
1060 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1061 | ||
46900298 | 1062 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1063 | { |
46900298 | 1064 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1065 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1066 | struct sta_info *sta; |
15b7b062 | 1067 | bool disassoc = false; |
f0706e82 JB |
1068 | |
1069 | /* TODO: start monitoring current AP signal quality and number of | |
1070 | * missed beacons. Scan other channels every now and then and search | |
1071 | * for better APs. */ | |
1072 | /* TODO: remove expired BSSes */ | |
1073 | ||
46900298 | 1074 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1075 | |
d0709a65 JB |
1076 | rcu_read_lock(); |
1077 | ||
46900298 | 1078 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1079 | if (!sta) { |
0c68ae26 | 1080 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1081 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1082 | disassoc = true; |
1083 | goto unlock; | |
1084 | } | |
1085 | ||
1086 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
1087 | time_after(jiffies, sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
1088 | printk(KERN_DEBUG "%s: no probe response from AP %pM " | |
1089 | "- disassociating\n", | |
1090 | sdata->dev->name, ifmgd->bssid); | |
1091 | disassoc = true; | |
1092 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1093 | goto unlock; | |
1094 | } | |
1095 | ||
04de8381 KV |
1096 | /* |
1097 | * Beacon filtering is only enabled with power save and then the | |
1098 | * stack should not check for beacon loss. | |
1099 | */ | |
1100 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1101 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1102 | time_after(jiffies, | |
15b7b062 | 1103 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1104 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1105 | if (net_ratelimit()) { | |
1106 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1107 | "- sending probe request\n", | |
1108 | sdata->dev->name, ifmgd->bssid); | |
1109 | } | |
1110 | #endif | |
15b7b062 KV |
1111 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1112 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1113 | ifmgd->ssid_len, NULL, 0); | |
1114 | goto unlock; | |
1115 | ||
1116 | } | |
1117 | ||
1118 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1119 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1120 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1121 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1122 | } |
d0709a65 | 1123 | |
15b7b062 | 1124 | unlock: |
d0709a65 JB |
1125 | rcu_read_unlock(); |
1126 | ||
7a947080 | 1127 | if (disassoc) |
46900298 | 1128 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1129 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1130 | else |
46900298 | 1131 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1132 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1133 | } |
1134 | ||
1135 | ||
46900298 | 1136 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1137 | { |
46900298 JB |
1138 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1139 | ||
f698d856 | 1140 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1141 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1142 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1143 | /* Wait for SME to request association */ | |
1144 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1145 | } else | |
1146 | ieee80211_associate(sdata); | |
f0706e82 JB |
1147 | } |
1148 | ||
1149 | ||
f698d856 | 1150 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1151 | struct ieee80211_mgmt *mgmt, |
1152 | size_t len) | |
1153 | { | |
1154 | u8 *pos; | |
1155 | struct ieee802_11_elems elems; | |
1156 | ||
f0706e82 | 1157 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1158 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1159 | if (!elems.challenge) |
f0706e82 | 1160 | return; |
46900298 JB |
1161 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1162 | elems.challenge - 2, elems.challenge_len + 2, | |
1163 | sdata->u.mgd.bssid, 1); | |
1164 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1165 | } |
1166 | ||
f698d856 | 1167 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1168 | struct ieee80211_mgmt *mgmt, |
1169 | size_t len) | |
1170 | { | |
46900298 | 1171 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1172 | u16 auth_alg, auth_transaction, status_code; |
1173 | ||
46900298 | 1174 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1175 | return; |
f0706e82 | 1176 | |
f4ea83dd | 1177 | if (len < 24 + 6) |
f0706e82 | 1178 | return; |
f0706e82 | 1179 | |
46900298 | 1180 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1181 | return; |
f0706e82 | 1182 | |
46900298 | 1183 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1184 | return; |
f0706e82 JB |
1185 | |
1186 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1187 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1188 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1189 | ||
46900298 JB |
1190 | if (auth_alg != ifmgd->auth_alg || |
1191 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1192 | return; |
f0706e82 JB |
1193 | |
1194 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1195 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1196 | u8 algs[3]; | |
1197 | const int num_algs = ARRAY_SIZE(algs); | |
1198 | int i, pos; | |
1199 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1200 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1201 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1202 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1203 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1204 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1205 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1206 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1207 | pos = 0; |
46900298 | 1208 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1209 | pos = 1; |
1210 | else | |
1211 | pos = 2; | |
1212 | for (i = 0; i < num_algs; i++) { | |
1213 | pos++; | |
1214 | if (pos >= num_algs) | |
1215 | pos = 0; | |
46900298 | 1216 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1217 | algs[pos] == 0xff) |
1218 | continue; | |
1219 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1220 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1221 | continue; |
46900298 | 1222 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1223 | break; |
1224 | } | |
1225 | } | |
1226 | return; | |
1227 | } | |
1228 | ||
46900298 | 1229 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1230 | case WLAN_AUTH_OPEN: |
1231 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1232 | case WLAN_AUTH_FT: |
46900298 | 1233 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1234 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1235 | break; |
1236 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1237 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1238 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1239 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1240 | } else | |
46900298 | 1241 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1242 | break; |
1243 | } | |
1244 | } | |
1245 | ||
1246 | ||
f698d856 | 1247 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1248 | struct ieee80211_mgmt *mgmt, |
1249 | size_t len) | |
1250 | { | |
46900298 | 1251 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1252 | u16 reason_code; |
1253 | ||
f4ea83dd | 1254 | if (len < 24 + 2) |
f0706e82 | 1255 | return; |
f0706e82 | 1256 | |
46900298 | 1257 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1258 | return; |
f0706e82 JB |
1259 | |
1260 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1261 | ||
46900298 | 1262 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1263 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1264 | sdata->dev->name, reason_code); | |
f0706e82 | 1265 | |
636a5d36 JM |
1266 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1267 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1268 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1269 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1270 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1271 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1272 | IEEE80211_RETRY_AUTH_INTERVAL); |
1273 | } | |
1274 | ||
46900298 JB |
1275 | ieee80211_set_disassoc(sdata, true, false, 0); |
1276 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1277 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1278 | } |
1279 | ||
1280 | ||
f698d856 | 1281 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1282 | struct ieee80211_mgmt *mgmt, |
1283 | size_t len) | |
1284 | { | |
46900298 | 1285 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1286 | u16 reason_code; |
1287 | ||
f4ea83dd | 1288 | if (len < 24 + 2) |
f0706e82 | 1289 | return; |
f0706e82 | 1290 | |
46900298 | 1291 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1292 | return; |
f0706e82 JB |
1293 | |
1294 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1295 | ||
46900298 | 1296 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1297 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1298 | sdata->dev->name, reason_code); | |
f0706e82 | 1299 | |
636a5d36 JM |
1300 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1301 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1302 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1303 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1304 | IEEE80211_RETRY_AUTH_INTERVAL); |
1305 | } | |
1306 | ||
46900298 | 1307 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1308 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1309 | } |
1310 | ||
1311 | ||
471b3efd | 1312 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1313 | struct ieee80211_mgmt *mgmt, |
1314 | size_t len, | |
1315 | int reassoc) | |
1316 | { | |
46900298 | 1317 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1318 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1319 | struct ieee80211_supported_band *sband; |
f0706e82 | 1320 | struct sta_info *sta; |
881d948c | 1321 | u32 rates, basic_rates; |
f0706e82 JB |
1322 | u16 capab_info, status_code, aid; |
1323 | struct ieee802_11_elems elems; | |
bda3933a | 1324 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1325 | u8 *pos; |
ae5eb026 | 1326 | u32 changed = 0; |
f0706e82 | 1327 | int i, j; |
ddf4ac53 | 1328 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1329 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1330 | |
1331 | /* AssocResp and ReassocResp have identical structure, so process both | |
1332 | * of them in this function. */ | |
1333 | ||
46900298 | 1334 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1335 | return; |
f0706e82 | 1336 | |
f4ea83dd | 1337 | if (len < 24 + 6) |
f0706e82 | 1338 | return; |
f0706e82 | 1339 | |
46900298 | 1340 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1341 | return; |
f0706e82 JB |
1342 | |
1343 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1344 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1345 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1346 | |
0c68ae26 | 1347 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1348 | "status=%d aid=%d)\n", |
0c68ae26 | 1349 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1350 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1351 | |
63a5ab82 JM |
1352 | pos = mgmt->u.assoc_resp.variable; |
1353 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1354 | ||
1355 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1356 | elems.timeout_int && elems.timeout_int_len == 5 && |
1357 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1358 | u32 tu, ms; |
f797eb7e | 1359 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1360 | ms = tu * 1024 / 1000; |
1361 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1362 | "comeback duration %u TU (%u ms)\n", | |
1363 | sdata->dev->name, tu, ms); | |
1364 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1365 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1366 | jiffies + msecs_to_jiffies(ms)); |
1367 | return; | |
1368 | } | |
1369 | ||
f0706e82 JB |
1370 | if (status_code != WLAN_STATUS_SUCCESS) { |
1371 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1372 | sdata->dev->name, status_code); |
8a69aa93 DD |
1373 | /* if this was a reassociation, ensure we try a "full" |
1374 | * association next time. This works around some broken APs | |
1375 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1376 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1377 | return; |
1378 | } | |
1379 | ||
1dd84aa2 JB |
1380 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1381 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1382 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1383 | aid &= ~(BIT(15) | BIT(14)); |
1384 | ||
f0706e82 JB |
1385 | if (!elems.supp_rates) { |
1386 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1387 | sdata->dev->name); |
f0706e82 JB |
1388 | return; |
1389 | } | |
1390 | ||
f698d856 | 1391 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1392 | ifmgd->aid = aid; |
1393 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1394 | |
46900298 JB |
1395 | kfree(ifmgd->assocresp_ies); |
1396 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1397 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1398 | if (ifmgd->assocresp_ies) | |
1399 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1400 | |
d0709a65 JB |
1401 | rcu_read_lock(); |
1402 | ||
f0706e82 | 1403 | /* Add STA entry for the AP */ |
46900298 | 1404 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1405 | if (!sta) { |
ddf4ac53 | 1406 | newsta = true; |
d0709a65 | 1407 | |
46900298 | 1408 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1409 | if (!sta) { |
1410 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1411 | " the AP\n", sdata->dev->name); |
d0709a65 | 1412 | rcu_read_unlock(); |
f0706e82 JB |
1413 | return; |
1414 | } | |
f709fc69 | 1415 | |
60f8b39c JB |
1416 | /* update new sta with its last rx activity */ |
1417 | sta->last_rx = jiffies; | |
f709fc69 | 1418 | } |
f709fc69 | 1419 | |
60f8b39c JB |
1420 | /* |
1421 | * FIXME: Do we really need to update the sta_info's information here? | |
1422 | * We already know about the AP (we found it in our list) so it | |
1423 | * should already be filled with the right info, no? | |
1424 | * As is stands, all this is racy because typically we assume | |
1425 | * the information that is filled in here (except flags) doesn't | |
1426 | * change while a STA structure is alive. As such, it should move | |
1427 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1428 | */ | |
f709fc69 | 1429 | |
60f8b39c JB |
1430 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1431 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1432 | |
60f8b39c JB |
1433 | rates = 0; |
1434 | basic_rates = 0; | |
1435 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1436 | |
60f8b39c JB |
1437 | for (i = 0; i < elems.supp_rates_len; i++) { |
1438 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1439 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1440 | |
60f8b39c JB |
1441 | if (rate > 110) |
1442 | have_higher_than_11mbit = true; | |
1443 | ||
1444 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1445 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1446 | rates |= BIT(j); |
d61272cb TW |
1447 | if (is_basic) |
1448 | basic_rates |= BIT(j); | |
1449 | break; | |
1450 | } | |
f709fc69 | 1451 | } |
f709fc69 LCC |
1452 | } |
1453 | ||
60f8b39c JB |
1454 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1455 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1456 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1457 | |
60f8b39c JB |
1458 | if (rate > 110) |
1459 | have_higher_than_11mbit = true; | |
f0706e82 | 1460 | |
60f8b39c | 1461 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1462 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1463 | rates |= BIT(j); |
d61272cb TW |
1464 | if (is_basic) |
1465 | basic_rates |= BIT(j); | |
1466 | break; | |
1467 | } | |
60f8b39c | 1468 | } |
1ebebea8 | 1469 | } |
f0706e82 | 1470 | |
323ce79a | 1471 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1472 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1473 | |
1474 | /* cf. IEEE 802.11 9.2.12 */ | |
1475 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1476 | have_higher_than_11mbit) | |
1477 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1478 | else | |
1479 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1480 | |
e65c2263 S |
1481 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1482 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1483 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1484 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1485 | |
1486 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1487 | |
4b7679a5 | 1488 | rate_control_rate_init(sta); |
f0706e82 | 1489 | |
46900298 | 1490 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1491 | set_sta_flags(sta, WLAN_STA_MFP); |
1492 | ||
ddf4ac53 | 1493 | if (elems.wmm_param) |
60f8b39c | 1494 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1495 | |
1496 | if (newsta) { | |
1497 | int err = sta_info_insert(sta); | |
1498 | if (err) { | |
1499 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1500 | " the AP (error %d)\n", sdata->dev->name, err); | |
1501 | rcu_read_unlock(); | |
1502 | return; | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | rcu_read_unlock(); | |
1507 | ||
1508 | if (elems.wmm_param) | |
46900298 | 1509 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1510 | elems.wmm_param_len); |
f0706e82 | 1511 | |
ae5eb026 | 1512 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1513 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1514 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1515 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1516 | ap_ht_cap_flags); | |
1517 | ||
60f8b39c JB |
1518 | /* set AID and assoc capability, |
1519 | * ieee80211_set_associated() will tell the driver */ | |
1520 | bss_conf->aid = aid; | |
1521 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1522 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1523 | |
15b7b062 KV |
1524 | /* |
1525 | * initialise the time of last beacon to be the association time, | |
1526 | * otherwise beacon loss check will trigger immediately | |
1527 | */ | |
1528 | ifmgd->last_beacon = jiffies; | |
1529 | ||
46900298 | 1530 | ieee80211_associated(sdata); |
6039f6d2 | 1531 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1532 | } |
1533 | ||
1534 | ||
98c8fccf JB |
1535 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1536 | struct ieee80211_mgmt *mgmt, | |
1537 | size_t len, | |
1538 | struct ieee80211_rx_status *rx_status, | |
1539 | struct ieee802_11_elems *elems, | |
1540 | bool beacon) | |
1541 | { | |
1542 | struct ieee80211_local *local = sdata->local; | |
1543 | int freq; | |
c2b13452 | 1544 | struct ieee80211_bss *bss; |
98c8fccf | 1545 | struct ieee80211_channel *channel; |
98c8fccf JB |
1546 | |
1547 | if (elems->ds_params && elems->ds_params_len == 1) | |
1548 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1549 | else | |
1550 | freq = rx_status->freq; | |
1551 | ||
1552 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1553 | ||
1554 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1555 | return; | |
1556 | ||
98c8fccf | 1557 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1558 | channel, beacon); |
98c8fccf JB |
1559 | if (!bss) |
1560 | return; | |
1561 | ||
c481ec97 | 1562 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1563 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1564 | struct ieee80211_channel_sw_ie *sw_elem = |
1565 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1566 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1567 | } | |
1568 | ||
3e122be0 | 1569 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1570 | } |
1571 | ||
1572 | ||
f698d856 | 1573 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1574 | struct ieee80211_mgmt *mgmt, |
1575 | size_t len, | |
1576 | struct ieee80211_rx_status *rx_status) | |
1577 | { | |
15b7b062 | 1578 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1579 | size_t baselen; |
1580 | struct ieee802_11_elems elems; | |
1581 | ||
15b7b062 KV |
1582 | ifmgd = &sdata->u.mgd; |
1583 | ||
8e7cdbb6 TW |
1584 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1585 | return; /* ignore ProbeResp to foreign address */ | |
1586 | ||
ae6a44e3 EK |
1587 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1588 | if (baselen > len) | |
1589 | return; | |
1590 | ||
1591 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1592 | &elems); | |
1593 | ||
98c8fccf | 1594 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1595 | |
1596 | /* direct probe may be part of the association flow */ | |
1597 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
15b7b062 | 1598 | &ifmgd->request)) { |
9859b81e RR |
1599 | printk(KERN_DEBUG "%s direct probe responded\n", |
1600 | sdata->dev->name); | |
46900298 | 1601 | ieee80211_authenticate(sdata); |
9859b81e | 1602 | } |
15b7b062 KV |
1603 | |
1604 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1605 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1606 | } |
1607 | ||
f698d856 | 1608 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1609 | struct ieee80211_mgmt *mgmt, |
1610 | size_t len, | |
1611 | struct ieee80211_rx_status *rx_status) | |
1612 | { | |
46900298 | 1613 | struct ieee80211_if_managed *ifmgd; |
f0706e82 JB |
1614 | size_t baselen; |
1615 | struct ieee802_11_elems elems; | |
f698d856 | 1616 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1617 | u32 changed = 0; |
1fb3606b | 1618 | bool erp_valid, directed_tim; |
7a5158ef | 1619 | u8 erp_value = 0; |
f0706e82 | 1620 | |
ae6a44e3 EK |
1621 | /* Process beacon from the current BSS */ |
1622 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1623 | if (baselen > len) | |
1624 | return; | |
1625 | ||
1626 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1627 | ||
98c8fccf | 1628 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1629 | |
05c914fe | 1630 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 | 1631 | return; |
f0706e82 | 1632 | |
46900298 JB |
1633 | ifmgd = &sdata->u.mgd; |
1634 | ||
1635 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || | |
1636 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1637 | return; |
1638 | ||
c481ec97 S |
1639 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1640 | return; | |
1641 | ||
46900298 | 1642 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1643 | elems.wmm_param_len); |
1644 | ||
25c9c875 | 1645 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
46900298 | 1646 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); |
a97b77b9 | 1647 | |
1fb3606b | 1648 | if (directed_tim) { |
572e0012 KV |
1649 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1650 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1651 | ieee80211_hw_config(local, | |
1652 | IEEE80211_CONF_CHANGE_PS); | |
1653 | ieee80211_send_nullfunc(local, sdata, 0); | |
1654 | } else { | |
1655 | local->pspolling = true; | |
1656 | ||
1657 | /* | |
1658 | * Here is assumed that the driver will be | |
1659 | * able to send ps-poll frame and receive a | |
1660 | * response even though power save mode is | |
1661 | * enabled, but some drivers might require | |
1662 | * to disable power save here. This needs | |
1663 | * to be investigated. | |
1664 | */ | |
1665 | ieee80211_send_pspoll(local, sdata); | |
1666 | } | |
a97b77b9 VN |
1667 | } |
1668 | } | |
7a5158ef JB |
1669 | |
1670 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1671 | erp_valid = true; | |
1672 | erp_value = elems.erp_info[0]; | |
1673 | } else { | |
1674 | erp_valid = false; | |
50c4afb9 | 1675 | } |
7a5158ef JB |
1676 | changed |= ieee80211_handle_bss_capability(sdata, |
1677 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1678 | erp_valid, erp_value); | |
f0706e82 | 1679 | |
d3c990fb | 1680 | |
53d6f81c | 1681 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1682 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1683 | struct sta_info *sta; |
1684 | struct ieee80211_supported_band *sband; | |
1685 | u16 ap_ht_cap_flags; | |
1686 | ||
1687 | rcu_read_lock(); | |
1688 | ||
46900298 | 1689 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1690 | if (!sta) { |
1691 | rcu_read_unlock(); | |
1692 | return; | |
1693 | } | |
1694 | ||
1695 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1696 | ||
1697 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1698 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1699 | ||
1700 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1701 | ||
1702 | rcu_read_unlock(); | |
1703 | ||
1704 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1705 | ap_ht_cap_flags); | |
d3c990fb RR |
1706 | } |
1707 | ||
3f2355cb LR |
1708 | if (elems.country_elem) { |
1709 | /* Note we are only reviewing this on beacons | |
1710 | * for the BSSID we are associated to */ | |
1711 | regulatory_hint_11d(local->hw.wiphy, | |
1712 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1713 | |
1714 | /* TODO: IBSS also needs this */ | |
1715 | if (elems.pwr_constr_elem) | |
1716 | ieee80211_handle_pwr_constr(sdata, | |
1717 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1718 | elems.pwr_constr_elem, | |
1719 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1720 | } |
1721 | ||
471b3efd | 1722 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1723 | } |
1724 | ||
46900298 JB |
1725 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1726 | struct sk_buff *skb, | |
1727 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1728 | { |
f698d856 | 1729 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1730 | struct ieee80211_mgmt *mgmt; |
1731 | u16 fc; | |
1732 | ||
1733 | if (skb->len < 24) | |
46900298 | 1734 | return RX_DROP_MONITOR; |
f0706e82 JB |
1735 | |
1736 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1737 | fc = le16_to_cpu(mgmt->frame_control); | |
1738 | ||
1739 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1740 | case IEEE80211_STYPE_PROBE_REQ: | |
1741 | case IEEE80211_STYPE_PROBE_RESP: | |
1742 | case IEEE80211_STYPE_BEACON: | |
1743 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1744 | case IEEE80211_STYPE_AUTH: | |
1745 | case IEEE80211_STYPE_ASSOC_RESP: | |
1746 | case IEEE80211_STYPE_REASSOC_RESP: | |
1747 | case IEEE80211_STYPE_DEAUTH: | |
1748 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1749 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1750 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1751 | return RX_QUEUED; | |
f0706e82 JB |
1752 | } |
1753 | ||
46900298 | 1754 | return RX_DROP_MONITOR; |
f0706e82 JB |
1755 | } |
1756 | ||
f698d856 | 1757 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1758 | struct sk_buff *skb) |
1759 | { | |
1760 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1761 | struct ieee80211_mgmt *mgmt; |
1762 | u16 fc; | |
1763 | ||
f0706e82 JB |
1764 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1765 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1766 | fc = le16_to_cpu(mgmt->frame_control); | |
1767 | ||
46900298 JB |
1768 | switch (fc & IEEE80211_FCTL_STYPE) { |
1769 | case IEEE80211_STYPE_PROBE_RESP: | |
1770 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1771 | rx_status); | |
1772 | break; | |
1773 | case IEEE80211_STYPE_BEACON: | |
1774 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1775 | rx_status); | |
1776 | break; | |
1777 | case IEEE80211_STYPE_AUTH: | |
1778 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1779 | break; | |
1780 | case IEEE80211_STYPE_ASSOC_RESP: | |
1781 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1782 | break; | |
1783 | case IEEE80211_STYPE_REASSOC_RESP: | |
1784 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1785 | break; | |
1786 | case IEEE80211_STYPE_DEAUTH: | |
1787 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1788 | break; | |
1789 | case IEEE80211_STYPE_DISASSOC: | |
1790 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1791 | break; | |
f0706e82 JB |
1792 | } |
1793 | ||
1794 | kfree_skb(skb); | |
1795 | } | |
1796 | ||
9c6bd790 | 1797 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1798 | { |
60f8b39c JB |
1799 | struct ieee80211_sub_if_data *sdata = |
1800 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1801 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1802 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1803 | |
46900298 JB |
1804 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1805 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1806 | } |
1807 | ||
46900298 | 1808 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1809 | { |
46900298 | 1810 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1811 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1812 | |
1813 | if (local->ops->reset_tsf) { | |
1814 | /* Reset own TSF to allow time synchronization work. */ | |
1815 | local->ops->reset_tsf(local_to_hw(local)); | |
1816 | } | |
1817 | ||
46900298 | 1818 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1819 | |
1820 | ||
46900298 JB |
1821 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1822 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1823 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1824 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1825 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1826 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
1827 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
1828 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 1829 | else |
46900298 JB |
1830 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
1831 | ifmgd->auth_transaction = -1; | |
1832 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1833 | ifmgd->assoc_scan_tries = 0; | |
1834 | ifmgd->direct_probe_tries = 0; | |
1835 | ifmgd->auth_tries = 0; | |
1836 | ifmgd->assoc_tries = 0; | |
24e64622 | 1837 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 1838 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
1839 | } |
1840 | ||
46900298 | 1841 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1842 | { |
46900298 | 1843 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1844 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1845 | struct ieee80211_bss *bss; |
46900298 JB |
1846 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
1847 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
1848 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
1849 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
1850 | struct ieee80211_channel *chan = local->oper_channel; | |
1851 | ||
636a5d36 JM |
1852 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1853 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
1854 | IEEE80211_STA_AUTO_BSSID_SEL | |
1855 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
1856 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
1857 | if (sdata->default_key) | |
1858 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 1859 | } |
9d139c81 | 1860 | |
46900298 | 1861 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
1862 | chan = NULL; |
1863 | ||
46900298 | 1864 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
1865 | bssid = NULL; |
1866 | ||
46900298 | 1867 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
1868 | ssid = NULL; |
1869 | ssid_len = 0; | |
1870 | } | |
1871 | ||
1872 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
1873 | bssid, ssid, ssid_len, | |
1874 | capa_mask, capa_val); | |
1875 | ||
1876 | if (bss) { | |
1877 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 1878 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
1879 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
1880 | bss->ssid_len); | |
1881 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
1882 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
1883 | bss->supp_rates); | |
46900298 JB |
1884 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
1885 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 1886 | else |
46900298 | 1887 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 1888 | |
9c6bd790 JB |
1889 | /* Send out direct probe if no probe resp was received or |
1890 | * the one we have is outdated | |
1891 | */ | |
00d3f14c JB |
1892 | if (!bss->last_probe_resp || |
1893 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 1894 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 1895 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 1896 | else |
46900298 | 1897 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 1898 | |
00d3f14c | 1899 | ieee80211_rx_bss_put(local, bss); |
46900298 | 1900 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
1901 | return 0; |
1902 | } else { | |
46900298 JB |
1903 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
1904 | ifmgd->assoc_scan_tries++; | |
2a519311 JB |
1905 | /* XXX maybe racy? */ |
1906 | if (local->scan_req) | |
1907 | return -1; | |
1908 | memcpy(local->int_scan_req.ssids[0].ssid, | |
46900298 JB |
1909 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); |
1910 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
2a519311 | 1911 | local->int_scan_req.ssids[0].ssid_len = 0; |
9c6bd790 | 1912 | else |
46900298 | 1913 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; |
af88b907 HS |
1914 | |
1915 | if (ieee80211_start_scan(sdata, &local->int_scan_req)) | |
1916 | ieee80211_scan_failed(local); | |
1917 | ||
46900298 JB |
1918 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
1919 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 1920 | } else { |
46900298 JB |
1921 | ifmgd->assoc_scan_tries = 0; |
1922 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 1923 | } |
9c6bd790 JB |
1924 | } |
1925 | return -1; | |
1926 | } | |
1927 | ||
1928 | ||
1929 | static void ieee80211_sta_work(struct work_struct *work) | |
1930 | { | |
1931 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1932 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1933 | struct ieee80211_local *local = sdata->local; |
46900298 | 1934 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1935 | struct sk_buff *skb; |
1936 | ||
1937 | if (!netif_running(sdata->dev)) | |
1938 | return; | |
1939 | ||
c2b13452 | 1940 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
1941 | return; |
1942 | ||
46900298 | 1943 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1944 | return; |
46900298 | 1945 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1946 | |
46900298 | 1947 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1948 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1949 | ||
46900298 JB |
1950 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
1951 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
1952 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
1953 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
af88b907 HS |
1954 | /* |
1955 | * The call to ieee80211_start_scan can fail but ieee80211_request_scan | |
1956 | * (which queued ieee80211_sta_work) did not return an error. Thus, call | |
1957 | * ieee80211_scan_failed here if ieee80211_start_scan fails in order to | |
1958 | * notify the scan requester. | |
1959 | */ | |
1960 | if (ieee80211_start_scan(sdata, local->scan_req)) | |
1961 | ieee80211_scan_failed(local); | |
9c6bd790 | 1962 | return; |
f0706e82 JB |
1963 | } |
1964 | ||
46900298 JB |
1965 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
1966 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 1967 | return; |
46900298 JB |
1968 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1969 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 1970 | return; |
d6f2da5b | 1971 | |
46900298 | 1972 | switch (ifmgd->state) { |
9c6bd790 JB |
1973 | case IEEE80211_STA_MLME_DISABLED: |
1974 | break; | |
1975 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 1976 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
1977 | break; |
1978 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 1979 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
1980 | break; |
1981 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 1982 | ieee80211_associate(sdata); |
9c6bd790 JB |
1983 | break; |
1984 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 1985 | ieee80211_associated(sdata); |
9c6bd790 JB |
1986 | break; |
1987 | default: | |
1988 | WARN_ON(1); | |
1989 | break; | |
1990 | } | |
1991 | ||
46900298 | 1992 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
1993 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
1994 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
1995 | ||
46900298 | 1996 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
1997 | WLAN_REASON_UNSPECIFIED); |
1998 | } | |
f0706e82 JB |
1999 | } |
2000 | ||
9c6bd790 JB |
2001 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2002 | { | |
ad935687 KV |
2003 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2004 | /* | |
2005 | * Need to update last_beacon to avoid beacon loss | |
2006 | * test to trigger. | |
2007 | */ | |
2008 | sdata->u.mgd.last_beacon = jiffies; | |
2009 | ||
2010 | ||
9c6bd790 | 2011 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2012 | &sdata->u.mgd.work); |
ad935687 | 2013 | } |
9c6bd790 | 2014 | } |
f0706e82 | 2015 | |
9c6bd790 JB |
2016 | /* interface setup */ |
2017 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2018 | { |
46900298 | 2019 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 2020 | |
46900298 JB |
2021 | ifmgd = &sdata->u.mgd; |
2022 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2023 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2024 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2025 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2026 | (unsigned long) sdata); |
46900298 | 2027 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2028 | (unsigned long) sdata); |
46900298 | 2029 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2030 | |
46900298 JB |
2031 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2032 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2033 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2034 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2035 | IEEE80211_STA_AUTO_BSSID_SEL | |
2036 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2037 | if (sdata->local->hw.queues >= 4) |
46900298 | 2038 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
f0706e82 JB |
2039 | } |
2040 | ||
9c6bd790 | 2041 | /* configuration hooks */ |
46900298 | 2042 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2043 | { |
46900298 | 2044 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2045 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2046 | |
46900298 | 2047 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2048 | return; |
60f8b39c | 2049 | |
46900298 | 2050 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2051 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2052 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2053 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2054 | |
46900298 JB |
2055 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2056 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2057 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2058 | |
636a5d36 JM |
2059 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2060 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2061 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2062 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2063 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2064 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2065 | } |
2066 | } | |
60f8b39c | 2067 | |
79f6440c AF |
2068 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2069 | { | |
2070 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2071 | ||
79f6440c AF |
2072 | if (ifmgd->ssid_len) |
2073 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2074 | else | |
2075 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2076 | ||
2077 | return 0; | |
2078 | } | |
2079 | ||
9c6bd790 JB |
2080 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2081 | { | |
46900298 | 2082 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2083 | |
9c6bd790 JB |
2084 | if (len > IEEE80211_MAX_SSID_LEN) |
2085 | return -EINVAL; | |
2086 | ||
46900298 | 2087 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2088 | |
46900298 | 2089 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2090 | /* |
2091 | * Do not use reassociation if SSID is changed (different ESS). | |
2092 | */ | |
2093 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2094 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2095 | memcpy(ifmgd->ssid, ssid, len); | |
2096 | ifmgd->ssid_len = len; | |
60f8b39c | 2097 | } |
60f8b39c | 2098 | |
79f6440c | 2099 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2100 | } |
2101 | ||
2102 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2103 | { | |
46900298 JB |
2104 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2105 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2106 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2107 | return 0; |
2108 | } | |
2109 | ||
2110 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2111 | { | |
46900298 | 2112 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2113 | |
dfe67012 | 2114 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2115 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2116 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2117 | } else { |
46900298 JB |
2118 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2119 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2120 | } |
2121 | ||
2122 | if (netif_running(sdata->dev)) { | |
2123 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
9c6bd790 JB |
2124 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
2125 | "the low-level driver\n", sdata->dev->name); | |
9c6bd790 JB |
2126 | } |
2127 | } | |
60f8b39c | 2128 | |
79f6440c | 2129 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2130 | } |
2131 | ||
636a5d36 JM |
2132 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2133 | const char *ie, size_t len) | |
9c6bd790 | 2134 | { |
46900298 | 2135 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2136 | |
46900298 | 2137 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2138 | if (len == 0) { |
46900298 JB |
2139 | ifmgd->extra_ie = NULL; |
2140 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2141 | return 0; |
60f8b39c | 2142 | } |
46900298 JB |
2143 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2144 | if (!ifmgd->extra_ie) { | |
2145 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2146 | return -ENOMEM; |
2147 | } | |
46900298 JB |
2148 | memcpy(ifmgd->extra_ie, ie, len); |
2149 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2150 | return 0; |
60f8b39c JB |
2151 | } |
2152 | ||
f698d856 | 2153 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2154 | { |
f4ea83dd | 2155 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2156 | sdata->dev->name, reason); |
f0706e82 | 2157 | |
46900298 | 2158 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2159 | return -EINVAL; |
2160 | ||
46900298 | 2161 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2162 | return 0; |
2163 | } | |
2164 | ||
f698d856 | 2165 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2166 | { |
46900298 | 2167 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2168 | |
f4ea83dd | 2169 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2170 | sdata->dev->name, reason); |
f0706e82 | 2171 | |
05c914fe | 2172 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2173 | return -EINVAL; |
2174 | ||
46900298 JB |
2175 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2176 | return -ENOLINK; | |
f0706e82 | 2177 | |
46900298 | 2178 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2179 | return 0; |
2180 | } | |
84363e6e | 2181 | |
9c6bd790 JB |
2182 | /* scan finished notification */ |
2183 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2184 | { | |
2185 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2186 | |
2187 | /* Restart STA timers */ | |
2188 | rcu_read_lock(); | |
2189 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2190 | ieee80211_restart_sta_timer(sdata); | |
2191 | rcu_read_unlock(); | |
2192 | } | |
520eb820 KV |
2193 | |
2194 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2195 | { | |
2196 | struct ieee80211_local *local = | |
2197 | container_of(work, struct ieee80211_local, | |
2198 | dynamic_ps_disable_work); | |
2199 | ||
2200 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2201 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2202 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2203 | } | |
2204 | ||
2205 | ieee80211_wake_queues_by_reason(&local->hw, | |
2206 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2207 | } | |
2208 | ||
2209 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2210 | { | |
2211 | struct ieee80211_local *local = | |
2212 | container_of(work, struct ieee80211_local, | |
2213 | dynamic_ps_enable_work); | |
7181d467 | 2214 | /* XXX: using scan_sdata is completely broken! */ |
a97b77b9 | 2215 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
520eb820 KV |
2216 | |
2217 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2218 | return; | |
2219 | ||
7181d467 | 2220 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && sdata) |
4be8c387 | 2221 | ieee80211_send_nullfunc(local, sdata, 1); |
520eb820 | 2222 | |
4be8c387 | 2223 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
520eb820 KV |
2224 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
2225 | } | |
2226 | ||
2227 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2228 | { | |
2229 | struct ieee80211_local *local = (void *) data; | |
2230 | ||
2231 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2232 | } | |
46900298 JB |
2233 | |
2234 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2235 | struct ieee80211_sub_if_data *sdata, | |
2236 | int powersave) | |
2237 | { | |
2238 | struct sk_buff *skb; | |
2239 | struct ieee80211_hdr *nullfunc; | |
2240 | __le16 fc; | |
2241 | ||
2242 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2243 | return; | |
2244 | ||
2245 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2246 | if (!skb) { | |
2247 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2248 | "frame\n", sdata->dev->name); | |
2249 | return; | |
2250 | } | |
2251 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2252 | ||
2253 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2254 | memset(nullfunc, 0, 24); | |
2255 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2256 | IEEE80211_FCTL_TODS); | |
2257 | if (powersave) | |
2258 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
2259 | nullfunc->frame_control = fc; | |
2260 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2261 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2262 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2263 | ||
2264 | ieee80211_tx_skb(sdata, skb, 0); | |
2265 | } |