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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) | |
33 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
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 | ||
9c6bd790 JB |
83 | /* frame sending functions */ |
84 | ||
9aed3cc1 JM |
85 | static void add_extra_ies(struct sk_buff *skb, u8 *ies, size_t ies_len) |
86 | { | |
87 | if (ies) | |
88 | memcpy(skb_put(skb, ies_len), ies, ies_len); | |
89 | } | |
90 | ||
46900298 | 91 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 92 | { |
46900298 | 93 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
94 | struct ieee80211_local *local = sdata->local; |
95 | struct sk_buff *skb; | |
96 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 97 | u8 *pos, *ies, *ht_ie, *e_ies; |
9ac19a90 JB |
98 | int i, len, count, rates_len, supp_rates_len; |
99 | u16 capab; | |
c2b13452 | 100 | struct ieee80211_bss *bss; |
9ac19a90 JB |
101 | int wmm = 0; |
102 | struct ieee80211_supported_band *sband; | |
881d948c | 103 | u32 rates = 0; |
9aed3cc1 JM |
104 | size_t e_ies_len; |
105 | ||
4b4698c4 | 106 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
46900298 JB |
107 | e_ies = sdata->u.mgd.ie_reassocreq; |
108 | e_ies_len = sdata->u.mgd.ie_reassocreq_len; | |
9aed3cc1 | 109 | } else { |
46900298 JB |
110 | e_ies = sdata->u.mgd.ie_assocreq; |
111 | e_ies_len = sdata->u.mgd.ie_assocreq_len; | |
9aed3cc1 | 112 | } |
9ac19a90 JB |
113 | |
114 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 JB |
115 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
116 | ifmgd->ssid_len + e_ies_len); | |
9ac19a90 JB |
117 | if (!skb) { |
118 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
119 | "frame\n", sdata->dev->name); | |
120 | return; | |
121 | } | |
122 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
123 | ||
124 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
125 | ||
46900298 | 126 | capab = ifmgd->capab; |
9ac19a90 JB |
127 | |
128 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
129 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
130 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
131 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
132 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
133 | } | |
134 | ||
46900298 | 135 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 136 | local->hw.conf.channel->center_freq, |
46900298 | 137 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 138 | if (bss) { |
00d3f14c | 139 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
140 | capab |= WLAN_CAPABILITY_PRIVACY; |
141 | if (bss->wmm_used) | |
142 | wmm = 1; | |
143 | ||
144 | /* get all rates supported by the device and the AP as | |
145 | * some APs don't like getting a superset of their rates | |
146 | * in the association request (e.g. D-Link DAP 1353 in | |
147 | * b-only mode) */ | |
148 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
149 | ||
00d3f14c | 150 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
151 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
152 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
153 | ||
154 | ieee80211_rx_bss_put(local, bss); | |
155 | } else { | |
156 | rates = ~0; | |
157 | rates_len = sband->n_bitrates; | |
158 | } | |
159 | ||
160 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
161 | memset(mgmt, 0, 24); | |
46900298 | 162 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 163 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 164 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 165 | |
46900298 | 166 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
167 | skb_put(skb, 10); |
168 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
169 | IEEE80211_STYPE_REASSOC_REQ); | |
170 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
171 | mgmt->u.reassoc_req.listen_interval = | |
172 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 173 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
174 | ETH_ALEN); |
175 | } else { | |
176 | skb_put(skb, 4); | |
177 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
178 | IEEE80211_STYPE_ASSOC_REQ); | |
179 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 180 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
181 | cpu_to_le16(local->hw.conf.listen_interval); |
182 | } | |
183 | ||
184 | /* SSID */ | |
46900298 | 185 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 186 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
187 | *pos++ = ifmgd->ssid_len; |
188 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
189 | |
190 | /* add all rates which were marked to be used above */ | |
191 | supp_rates_len = rates_len; | |
192 | if (supp_rates_len > 8) | |
193 | supp_rates_len = 8; | |
194 | ||
195 | len = sband->n_bitrates; | |
196 | pos = skb_put(skb, supp_rates_len + 2); | |
197 | *pos++ = WLAN_EID_SUPP_RATES; | |
198 | *pos++ = supp_rates_len; | |
199 | ||
200 | count = 0; | |
201 | for (i = 0; i < sband->n_bitrates; i++) { | |
202 | if (BIT(i) & rates) { | |
203 | int rate = sband->bitrates[i].bitrate; | |
204 | *pos++ = (u8) (rate / 5); | |
205 | if (++count == 8) | |
206 | break; | |
207 | } | |
208 | } | |
209 | ||
210 | if (rates_len > count) { | |
211 | pos = skb_put(skb, rates_len - count + 2); | |
212 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
213 | *pos++ = rates_len - count; | |
214 | ||
215 | for (i++; i < sband->n_bitrates; i++) { | |
216 | if (BIT(i) & rates) { | |
217 | int rate = sband->bitrates[i].bitrate; | |
218 | *pos++ = (u8) (rate / 5); | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
224 | /* 1. power capabilities */ | |
225 | pos = skb_put(skb, 4); | |
226 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
227 | *pos++ = 2; | |
228 | *pos++ = 0; /* min tx power */ | |
229 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
230 | ||
231 | /* 2. supported channels */ | |
232 | /* TODO: get this in reg domain format */ | |
233 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
234 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
235 | *pos++ = 2 * sband->n_channels; | |
236 | for (i = 0; i < sband->n_channels; i++) { | |
237 | *pos++ = ieee80211_frequency_to_channel( | |
238 | sband->channels[i].center_freq); | |
239 | *pos++ = 1; /* one channel in the subband*/ | |
240 | } | |
241 | } | |
242 | ||
46900298 JB |
243 | if (ifmgd->extra_ie) { |
244 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
245 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
246 | } |
247 | ||
46900298 | 248 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
249 | pos = skb_put(skb, 9); |
250 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
251 | *pos++ = 7; /* len */ | |
252 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
253 | *pos++ = 0x50; | |
254 | *pos++ = 0xf2; | |
255 | *pos++ = 2; /* WME */ | |
256 | *pos++ = 0; /* WME info */ | |
257 | *pos++ = 1; /* WME ver */ | |
258 | *pos++ = 0; | |
259 | } | |
260 | ||
261 | /* wmm support is a must to HT */ | |
eb46936b VT |
262 | /* |
263 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
264 | * ciphers in HT mode. We still associate in non-ht | |
265 | * mode (11a/b/g) if any one of these ciphers is | |
266 | * configured as pairwise. | |
267 | */ | |
46900298 | 268 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
269 | sband->ht_cap.ht_supported && |
270 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 271 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 272 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
273 | struct ieee80211_ht_info *ht_info = |
274 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
275 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
276 | __le16 tmp; |
277 | u32 flags = local->hw.conf.channel->flags; | |
278 | ||
d9fe60de JB |
279 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
280 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
9ac19a90 | 281 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { |
d9fe60de | 282 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
283 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
284 | } | |
285 | break; | |
d9fe60de | 286 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
9ac19a90 | 287 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { |
d9fe60de | 288 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
289 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
290 | } | |
291 | break; | |
292 | } | |
293 | ||
294 | tmp = cpu_to_le16(cap); | |
295 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
296 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
297 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
298 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
299 | memcpy(pos, &tmp, sizeof(u16)); | |
300 | pos += sizeof(u16); | |
301 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
302 | *pos++ = sband->ht_cap.ampdu_factor | |
303 | (sband->ht_cap.ampdu_density << 2); | |
304 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
305 | } |
306 | ||
9aed3cc1 JM |
307 | add_extra_ies(skb, e_ies, e_ies_len); |
308 | ||
46900298 JB |
309 | kfree(ifmgd->assocreq_ies); |
310 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
311 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
312 | if (ifmgd->assocreq_ies) | |
313 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 314 | |
e50db65c | 315 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
316 | } |
317 | ||
318 | ||
ef422bc0 JB |
319 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
320 | u16 stype, u16 reason) | |
9ac19a90 JB |
321 | { |
322 | struct ieee80211_local *local = sdata->local; | |
46900298 | 323 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
324 | struct sk_buff *skb; |
325 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 JM |
326 | u8 *ies; |
327 | size_t ies_len; | |
9ac19a90 | 328 | |
9aed3cc1 | 329 | if (stype == IEEE80211_STYPE_DEAUTH) { |
46900298 JB |
330 | ies = sdata->u.mgd.ie_deauth; |
331 | ies_len = sdata->u.mgd.ie_deauth_len; | |
9aed3cc1 | 332 | } else { |
46900298 JB |
333 | ies = sdata->u.mgd.ie_disassoc; |
334 | ies_len = sdata->u.mgd.ie_disassoc_len; | |
9aed3cc1 JM |
335 | } |
336 | ||
337 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + | |
338 | ies_len); | |
9ac19a90 | 339 | if (!skb) { |
ef422bc0 JB |
340 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
341 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
342 | return; |
343 | } | |
344 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
345 | ||
346 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
347 | memset(mgmt, 0, 24); | |
46900298 | 348 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 349 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 350 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 351 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 352 | skb_put(skb, 2); |
ef422bc0 | 353 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
354 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
355 | ||
9aed3cc1 JM |
356 | add_extra_ies(skb, ies, ies_len); |
357 | ||
46900298 | 358 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
359 | } |
360 | ||
572e0012 KV |
361 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
362 | struct ieee80211_sub_if_data *sdata) | |
363 | { | |
46900298 | 364 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
365 | struct ieee80211_pspoll *pspoll; |
366 | struct sk_buff *skb; | |
367 | u16 fc; | |
368 | ||
369 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
370 | if (!skb) { | |
371 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
372 | "pspoll frame\n", sdata->dev->name); | |
373 | return; | |
374 | } | |
375 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
376 | ||
377 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
378 | memset(pspoll, 0, sizeof(*pspoll)); | |
379 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
380 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 381 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
382 | |
383 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
384 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
385 | ||
46900298 | 386 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
387 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
388 | ||
389 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
390 | } |
391 | ||
60f8b39c | 392 | /* MLME */ |
f698d856 | 393 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 394 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
395 | u8 *wmm_param, size_t wmm_param_len) |
396 | { | |
f0706e82 JB |
397 | struct ieee80211_tx_queue_params params; |
398 | size_t left; | |
399 | int count; | |
400 | u8 *pos; | |
401 | ||
46900298 | 402 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
403 | return; |
404 | ||
405 | if (!wmm_param) | |
406 | return; | |
407 | ||
f0706e82 JB |
408 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
409 | return; | |
410 | count = wmm_param[6] & 0x0f; | |
46900298 | 411 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 412 | return; |
46900298 | 413 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
414 | |
415 | pos = wmm_param + 8; | |
416 | left = wmm_param_len - 8; | |
417 | ||
418 | memset(¶ms, 0, sizeof(params)); | |
419 | ||
f0706e82 JB |
420 | local->wmm_acm = 0; |
421 | for (; left >= 4; left -= 4, pos += 4) { | |
422 | int aci = (pos[0] >> 5) & 0x03; | |
423 | int acm = (pos[0] >> 4) & 0x01; | |
424 | int queue; | |
425 | ||
426 | switch (aci) { | |
0eeb59fe | 427 | case 1: /* AC_BK */ |
e100bb64 | 428 | queue = 3; |
988c0f72 | 429 | if (acm) |
0eeb59fe | 430 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 431 | break; |
0eeb59fe | 432 | case 2: /* AC_VI */ |
e100bb64 | 433 | queue = 1; |
988c0f72 | 434 | if (acm) |
0eeb59fe | 435 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 436 | break; |
0eeb59fe | 437 | case 3: /* AC_VO */ |
e100bb64 | 438 | queue = 0; |
988c0f72 | 439 | if (acm) |
0eeb59fe | 440 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 441 | break; |
0eeb59fe | 442 | case 0: /* AC_BE */ |
f0706e82 | 443 | default: |
e100bb64 | 444 | queue = 2; |
988c0f72 | 445 | if (acm) |
0eeb59fe | 446 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
447 | break; |
448 | } | |
449 | ||
450 | params.aifs = pos[0] & 0x0f; | |
451 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
452 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 453 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 454 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 455 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 456 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 457 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
458 | params.cw_max, params.txop); |
459 | #endif | |
0eeb59fe JM |
460 | if (local->ops->conf_tx && |
461 | local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
f0706e82 | 462 | printk(KERN_DEBUG "%s: failed to set TX queue " |
f698d856 | 463 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
464 | } |
465 | } | |
466 | } | |
467 | ||
1fb3606b | 468 | static bool ieee80211_check_tim(struct ieee802_11_elems *elems, u16 aid) |
a97b77b9 VN |
469 | { |
470 | u8 mask; | |
471 | u8 index, indexn1, indexn2; | |
472 | struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim; | |
473 | ||
474 | aid &= 0x3fff; | |
475 | index = aid / 8; | |
476 | mask = 1 << (aid & 7); | |
477 | ||
a97b77b9 VN |
478 | indexn1 = tim->bitmap_ctrl & 0xfe; |
479 | indexn2 = elems->tim_len + indexn1 - 4; | |
480 | ||
481 | if (index < indexn1 || index > indexn2) | |
482 | return false; | |
483 | ||
484 | index -= indexn1; | |
485 | ||
486 | return !!(tim->virtual_map[index] & mask); | |
487 | } | |
488 | ||
7a5158ef JB |
489 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
490 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 491 | { |
bda3933a | 492 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 493 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 494 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 495 | #endif |
471b3efd | 496 | u32 changed = 0; |
7a5158ef JB |
497 | bool use_protection; |
498 | bool use_short_preamble; | |
499 | bool use_short_slot; | |
500 | ||
501 | if (erp_valid) { | |
502 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
503 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
504 | } else { | |
505 | use_protection = false; | |
506 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
507 | } | |
508 | ||
509 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 510 | |
471b3efd | 511 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 512 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 513 | if (net_ratelimit()) { |
0c68ae26 | 514 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 515 | sdata->dev->name, |
5628221c | 516 | use_protection ? "enabled" : "disabled", |
46900298 | 517 | ifmgd->bssid); |
5628221c | 518 | } |
f4ea83dd | 519 | #endif |
471b3efd JB |
520 | bss_conf->use_cts_prot = use_protection; |
521 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 522 | } |
7e9ed188 | 523 | |
d43c7b37 | 524 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 525 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
526 | if (net_ratelimit()) { |
527 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 528 | " (BSSID=%pM)\n", |
471b3efd | 529 | sdata->dev->name, |
d43c7b37 | 530 | use_short_preamble ? "short" : "long", |
46900298 | 531 | ifmgd->bssid); |
7e9ed188 | 532 | } |
f4ea83dd | 533 | #endif |
d43c7b37 | 534 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 535 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 536 | } |
d9430a32 | 537 | |
7a5158ef JB |
538 | if (use_short_slot != bss_conf->use_short_slot) { |
539 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
540 | if (net_ratelimit()) { | |
391429c1 CL |
541 | printk(KERN_DEBUG "%s: switched to %s slot time" |
542 | " (BSSID=%pM)\n", | |
7a5158ef JB |
543 | sdata->dev->name, |
544 | use_short_slot ? "short" : "long", | |
46900298 | 545 | ifmgd->bssid); |
7a5158ef JB |
546 | } |
547 | #endif | |
548 | bss_conf->use_short_slot = use_short_slot; | |
549 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
550 | } |
551 | ||
552 | return changed; | |
553 | } | |
554 | ||
46900298 | 555 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
556 | { |
557 | union iwreq_data wrqu; | |
46900298 | 558 | |
f5e5bf25 | 559 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
560 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
561 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
562 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
563 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
564 | } | |
565 | ||
46900298 | 566 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 567 | { |
46900298 | 568 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
569 | char *buf; |
570 | size_t len; | |
571 | int i; | |
f0706e82 JB |
572 | union iwreq_data wrqu; |
573 | ||
46900298 | 574 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
575 | return; |
576 | ||
46900298 JB |
577 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
578 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
579 | if (!buf) |
580 | return; | |
581 | ||
582 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 583 | if (ifmgd->assocreq_ies) { |
74af0250 | 584 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 585 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 586 | len += sprintf(buf + len, "%02x", |
46900298 | 587 | ifmgd->assocreq_ies[i]); |
74af0250 | 588 | } |
f0706e82 | 589 | } |
46900298 JB |
590 | if (ifmgd->assocresp_ies) { |
591 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
592 | len += sprintf(buf + len, " "); |
593 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 594 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 595 | len += sprintf(buf + len, "%02x", |
46900298 | 596 | ifmgd->assocresp_ies[i]); |
74af0250 | 597 | } |
f0706e82 | 598 | } |
74af0250 LT |
599 | len += sprintf(buf + len, ")"); |
600 | ||
601 | if (len > IW_CUSTOM_MAX) { | |
602 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 603 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 604 | len += sprintf(buf + len, "%02x", |
46900298 | 605 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
606 | } |
607 | } | |
608 | ||
ad788b5e JL |
609 | if (len <= IW_CUSTOM_MAX) { |
610 | memset(&wrqu, 0, sizeof(wrqu)); | |
611 | wrqu.data.length = len; | |
612 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
613 | } | |
74af0250 LT |
614 | |
615 | kfree(buf); | |
f0706e82 JB |
616 | } |
617 | ||
618 | ||
f698d856 | 619 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 620 | u32 bss_info_changed) |
f0706e82 | 621 | { |
46900298 | 622 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 623 | struct ieee80211_local *local = sdata->local; |
38668c05 | 624 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 625 | |
c2b13452 | 626 | struct ieee80211_bss *bss; |
d6f2da5b | 627 | |
ae5eb026 | 628 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 629 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 630 | |
46900298 | 631 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 632 | conf->channel->center_freq, |
46900298 | 633 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
634 | if (bss) { |
635 | /* set timing information */ | |
00d3f14c JB |
636 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
637 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 638 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 639 | |
ae5eb026 | 640 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 641 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 JB |
642 | |
643 | ieee80211_rx_bss_put(local, bss); | |
f0706e82 JB |
644 | } |
645 | ||
46900298 JB |
646 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
647 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
648 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 649 | |
46900298 | 650 | ifmgd->last_probe = jiffies; |
9ac19a90 | 651 | ieee80211_led_assoc(local, 1); |
9306102e | 652 | |
bda3933a | 653 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
654 | /* |
655 | * For now just always ask the driver to update the basic rateset | |
656 | * when we have associated, we aren't checking whether it actually | |
657 | * changed or not. | |
658 | */ | |
ae5eb026 JB |
659 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
660 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 661 | |
4be8c387 JB |
662 | if (local->powersave) { |
663 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
664 | local->hw.conf.dynamic_ps_timeout > 0) { | |
520eb820 | 665 | mod_timer(&local->dynamic_ps_timer, jiffies + |
46f2c4bd JB |
666 | msecs_to_jiffies( |
667 | local->hw.conf.dynamic_ps_timeout)); | |
4be8c387 JB |
668 | } else { |
669 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
670 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 671 | conf->flags |= IEEE80211_CONF_PS; |
4be8c387 | 672 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
520eb820 | 673 | } |
e0cb686f KV |
674 | } |
675 | ||
9ac19a90 JB |
676 | netif_tx_start_all_queues(sdata->dev); |
677 | netif_carrier_on(sdata->dev); | |
f0706e82 | 678 | |
46900298 | 679 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
680 | } |
681 | ||
46900298 | 682 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 683 | { |
46900298 | 684 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 685 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
686 | |
687 | ifmgd->direct_probe_tries++; | |
688 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 689 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
690 | sdata->dev->name, ifmgd->bssid); |
691 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
692 | ieee80211_sta_send_apinfo(sdata); | |
7a947080 VT |
693 | |
694 | /* | |
695 | * Most likely AP is not in the range so remove the | |
696 | * bss information associated to the AP | |
697 | */ | |
46900298 | 698 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 699 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 700 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
701 | |
702 | /* | |
703 | * We might have a pending scan which had no chance to run yet | |
704 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
705 | * Hence, queue the STAs work again | |
706 | */ | |
707 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
708 | return; |
709 | } | |
f0706e82 | 710 | |
0c68ae26 | 711 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
712 | sdata->dev->name, ifmgd->bssid, |
713 | ifmgd->direct_probe_tries); | |
f0706e82 | 714 | |
46900298 | 715 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 716 | |
46900298 | 717 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifmgd->request); |
9ac19a90 JB |
718 | |
719 | /* Direct probe is sent to broadcast address as some APs | |
720 | * will not answer to direct packet in unassociated state. | |
721 | */ | |
722 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 723 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 724 | |
46900298 | 725 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 726 | } |
f0706e82 | 727 | |
9ac19a90 | 728 | |
46900298 | 729 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 730 | { |
46900298 | 731 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 732 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
733 | u8 *ies; |
734 | size_t ies_len; | |
46900298 JB |
735 | |
736 | ifmgd->auth_tries++; | |
737 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 738 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 739 | " timed out\n", |
46900298 JB |
740 | sdata->dev->name, ifmgd->bssid); |
741 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
742 | ieee80211_sta_send_apinfo(sdata); | |
743 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 744 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 745 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
746 | |
747 | /* | |
748 | * We might have a pending scan which had no chance to run yet | |
749 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
750 | * Hence, queue the STAs work again | |
751 | */ | |
752 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
753 | return; |
754 | } | |
f0706e82 | 755 | |
46900298 | 756 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 757 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 758 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 759 | |
636a5d36 JM |
760 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
761 | ies = ifmgd->sme_auth_ie; | |
762 | ies_len = ifmgd->sme_auth_ie_len; | |
763 | } else { | |
764 | ies = NULL; | |
765 | ies_len = 0; | |
766 | } | |
767 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
768 | ifmgd->bssid, 0); |
769 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 770 | |
46900298 | 771 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
772 | } |
773 | ||
5925d976 VN |
774 | /* |
775 | * The disassoc 'reason' argument can be either our own reason | |
776 | * if self disconnected or a reason code from the AP. | |
777 | */ | |
aa458d17 | 778 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
779 | bool deauth, bool self_disconnected, |
780 | u16 reason) | |
aa458d17 | 781 | { |
46900298 | 782 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
783 | struct ieee80211_local *local = sdata->local; |
784 | struct sta_info *sta; | |
e0cb686f | 785 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
786 | |
787 | rcu_read_lock(); | |
788 | ||
46900298 | 789 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
790 | if (!sta) { |
791 | rcu_read_unlock(); | |
792 | return; | |
793 | } | |
794 | ||
795 | if (deauth) { | |
46900298 JB |
796 | ifmgd->direct_probe_tries = 0; |
797 | ifmgd->auth_tries = 0; | |
aa458d17 | 798 | } |
46900298 JB |
799 | ifmgd->assoc_scan_tries = 0; |
800 | ifmgd->assoc_tries = 0; | |
aa458d17 | 801 | |
24e64622 | 802 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
803 | netif_carrier_off(sdata->dev); |
804 | ||
2dace10e | 805 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 TW |
806 | |
807 | if (self_disconnected) { | |
808 | if (deauth) | |
ef422bc0 JB |
809 | ieee80211_send_deauth_disassoc(sdata, |
810 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 811 | else |
ef422bc0 JB |
812 | ieee80211_send_deauth_disassoc(sdata, |
813 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
814 | } |
815 | ||
46900298 | 816 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
817 | changed |= ieee80211_reset_erp_info(sdata); |
818 | ||
f5e5bf25 | 819 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
820 | changed |= BSS_CHANGED_ASSOC; |
821 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 822 | |
46900298 | 823 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 824 | |
7a947080 | 825 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
826 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
827 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 828 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 829 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 830 | } |
aa458d17 | 831 | |
aa458d17 TW |
832 | rcu_read_unlock(); |
833 | ||
4797938c | 834 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 835 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 836 | |
a8302de9 VT |
837 | local->power_constr_level = 0; |
838 | ||
520eb820 KV |
839 | del_timer_sync(&local->dynamic_ps_timer); |
840 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
841 | ||
e0cb686f KV |
842 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
843 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
844 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
845 | } | |
ae5eb026 | 846 | |
e0cb686f | 847 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 848 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
849 | |
850 | rcu_read_lock(); | |
851 | ||
46900298 | 852 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
853 | if (!sta) { |
854 | rcu_read_unlock(); | |
855 | return; | |
856 | } | |
857 | ||
858 | sta_info_unlink(&sta); | |
859 | ||
860 | rcu_read_unlock(); | |
861 | ||
862 | sta_info_destroy(sta); | |
aa458d17 | 863 | } |
f0706e82 | 864 | |
9ac19a90 JB |
865 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
866 | { | |
867 | if (!sdata || !sdata->default_key || | |
868 | sdata->default_key->conf.alg != ALG_WEP) | |
869 | return 0; | |
870 | return 1; | |
871 | } | |
872 | ||
46900298 | 873 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 874 | { |
46900298 | 875 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 876 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 877 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
878 | int bss_privacy; |
879 | int wep_privacy; | |
880 | int privacy_invoked; | |
f0706e82 | 881 | |
636a5d36 JM |
882 | if (!ifmgd || (ifmgd->flags & (IEEE80211_STA_MIXED_CELL | |
883 | IEEE80211_STA_EXT_SME))) | |
f0706e82 JB |
884 | return 0; |
885 | ||
46900298 | 886 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 887 | local->hw.conf.channel->center_freq, |
46900298 | 888 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
889 | if (!bss) |
890 | return 0; | |
891 | ||
00d3f14c | 892 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 893 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 894 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 895 | |
3e122be0 | 896 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 897 | |
5b98b1f7 JB |
898 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
899 | return 0; | |
900 | ||
901 | return 1; | |
f0706e82 JB |
902 | } |
903 | ||
46900298 | 904 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 905 | { |
46900298 | 906 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 907 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
908 | |
909 | ifmgd->assoc_tries++; | |
910 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 911 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 912 | " timed out\n", |
46900298 JB |
913 | sdata->dev->name, ifmgd->bssid); |
914 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
915 | ieee80211_sta_send_apinfo(sdata); | |
916 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 917 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 918 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
919 | /* |
920 | * We might have a pending scan which had no chance to run yet | |
921 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
922 | * Hence, queue the STAs work again | |
923 | */ | |
924 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
925 | return; |
926 | } | |
927 | ||
46900298 | 928 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 929 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
930 | sdata->dev->name, ifmgd->bssid); |
931 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 932 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 933 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 934 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
935 | return; |
936 | } | |
937 | ||
46900298 | 938 | ieee80211_send_assoc(sdata); |
f0706e82 | 939 | |
46900298 | 940 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
941 | } |
942 | ||
943 | ||
46900298 | 944 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 945 | { |
46900298 | 946 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 947 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
948 | struct sta_info *sta; |
949 | int disassoc; | |
950 | ||
951 | /* TODO: start monitoring current AP signal quality and number of | |
952 | * missed beacons. Scan other channels every now and then and search | |
953 | * for better APs. */ | |
954 | /* TODO: remove expired BSSes */ | |
955 | ||
46900298 | 956 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 957 | |
d0709a65 JB |
958 | rcu_read_lock(); |
959 | ||
46900298 | 960 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 961 | if (!sta) { |
0c68ae26 | 962 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 963 | sdata->dev->name, ifmgd->bssid); |
f0706e82 JB |
964 | disassoc = 1; |
965 | } else { | |
966 | disassoc = 0; | |
967 | if (time_after(jiffies, | |
968 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
46900298 | 969 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 970 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 971 | "current AP %pM - assume out of " |
f0706e82 | 972 | "range\n", |
46900298 | 973 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 974 | disassoc = 1; |
d6f2da5b | 975 | } else |
46900298 JB |
976 | ieee80211_send_probe_req(sdata, ifmgd->bssid, |
977 | ifmgd->ssid, | |
70692ad2 JM |
978 | ifmgd->ssid_len, |
979 | NULL, 0); | |
46900298 | 980 | ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 981 | } else { |
46900298 JB |
982 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
983 | if (time_after(jiffies, ifmgd->last_probe + | |
f0706e82 | 984 | IEEE80211_PROBE_INTERVAL)) { |
46900298 JB |
985 | ifmgd->last_probe = jiffies; |
986 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
987 | ifmgd->ssid, | |
70692ad2 JM |
988 | ifmgd->ssid_len, |
989 | NULL, 0); | |
f0706e82 JB |
990 | } |
991 | } | |
f0706e82 | 992 | } |
d0709a65 JB |
993 | |
994 | rcu_read_unlock(); | |
995 | ||
7a947080 | 996 | if (disassoc) |
46900298 | 997 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 998 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 999 | else |
46900298 | 1000 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1001 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1002 | } |
1003 | ||
1004 | ||
46900298 | 1005 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1006 | { |
46900298 JB |
1007 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1008 | ||
f698d856 | 1009 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1010 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1011 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1012 | /* Wait for SME to request association */ | |
1013 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1014 | } else | |
1015 | ieee80211_associate(sdata); | |
f0706e82 JB |
1016 | } |
1017 | ||
1018 | ||
f698d856 | 1019 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1020 | struct ieee80211_mgmt *mgmt, |
1021 | size_t len) | |
1022 | { | |
1023 | u8 *pos; | |
1024 | struct ieee802_11_elems elems; | |
1025 | ||
f0706e82 | 1026 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1027 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1028 | if (!elems.challenge) |
f0706e82 | 1029 | return; |
46900298 JB |
1030 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1031 | elems.challenge - 2, elems.challenge_len + 2, | |
1032 | sdata->u.mgd.bssid, 1); | |
1033 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1034 | } |
1035 | ||
f698d856 | 1036 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1037 | struct ieee80211_mgmt *mgmt, |
1038 | size_t len) | |
1039 | { | |
46900298 | 1040 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1041 | u16 auth_alg, auth_transaction, status_code; |
1042 | ||
46900298 | 1043 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1044 | return; |
f0706e82 | 1045 | |
f4ea83dd | 1046 | if (len < 24 + 6) |
f0706e82 | 1047 | return; |
f0706e82 | 1048 | |
46900298 | 1049 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1050 | return; |
f0706e82 | 1051 | |
46900298 | 1052 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1053 | return; |
f0706e82 JB |
1054 | |
1055 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1056 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1057 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1058 | ||
46900298 JB |
1059 | if (auth_alg != ifmgd->auth_alg || |
1060 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1061 | return; |
f0706e82 JB |
1062 | |
1063 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1064 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1065 | u8 algs[3]; | |
1066 | const int num_algs = ARRAY_SIZE(algs); | |
1067 | int i, pos; | |
1068 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1069 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1070 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1071 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1072 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1073 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1074 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1075 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1076 | pos = 0; |
46900298 | 1077 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1078 | pos = 1; |
1079 | else | |
1080 | pos = 2; | |
1081 | for (i = 0; i < num_algs; i++) { | |
1082 | pos++; | |
1083 | if (pos >= num_algs) | |
1084 | pos = 0; | |
46900298 | 1085 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1086 | algs[pos] == 0xff) |
1087 | continue; | |
1088 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1089 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1090 | continue; |
46900298 | 1091 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1092 | break; |
1093 | } | |
1094 | } | |
1095 | return; | |
1096 | } | |
1097 | ||
46900298 | 1098 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1099 | case WLAN_AUTH_OPEN: |
1100 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1101 | case WLAN_AUTH_FT: |
46900298 | 1102 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1103 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1104 | break; |
1105 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1106 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1107 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1108 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1109 | } else | |
46900298 | 1110 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1111 | break; |
1112 | } | |
1113 | } | |
1114 | ||
1115 | ||
f698d856 | 1116 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1117 | struct ieee80211_mgmt *mgmt, |
1118 | size_t len) | |
1119 | { | |
46900298 | 1120 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1121 | u16 reason_code; |
1122 | ||
f4ea83dd | 1123 | if (len < 24 + 2) |
f0706e82 | 1124 | return; |
f0706e82 | 1125 | |
46900298 | 1126 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1127 | return; |
f0706e82 JB |
1128 | |
1129 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1130 | ||
46900298 | 1131 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1132 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1133 | sdata->dev->name, reason_code); | |
f0706e82 | 1134 | |
636a5d36 JM |
1135 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1136 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1137 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1138 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1139 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1140 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1141 | IEEE80211_RETRY_AUTH_INTERVAL); |
1142 | } | |
1143 | ||
46900298 JB |
1144 | ieee80211_set_disassoc(sdata, true, false, 0); |
1145 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
6039f6d2 | 1146 | cfg80211_send_rx_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1147 | } |
1148 | ||
1149 | ||
f698d856 | 1150 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1151 | struct ieee80211_mgmt *mgmt, |
1152 | size_t len) | |
1153 | { | |
46900298 | 1154 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1155 | u16 reason_code; |
1156 | ||
f4ea83dd | 1157 | if (len < 24 + 2) |
f0706e82 | 1158 | return; |
f0706e82 | 1159 | |
46900298 | 1160 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1161 | return; |
f0706e82 JB |
1162 | |
1163 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1164 | ||
46900298 | 1165 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1166 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1167 | sdata->dev->name, reason_code); | |
f0706e82 | 1168 | |
636a5d36 JM |
1169 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1170 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1171 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1172 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1173 | IEEE80211_RETRY_AUTH_INTERVAL); |
1174 | } | |
1175 | ||
46900298 | 1176 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
6039f6d2 | 1177 | cfg80211_send_rx_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1178 | } |
1179 | ||
1180 | ||
471b3efd | 1181 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1182 | struct ieee80211_mgmt *mgmt, |
1183 | size_t len, | |
1184 | int reassoc) | |
1185 | { | |
46900298 | 1186 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1187 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1188 | struct ieee80211_supported_band *sband; |
f0706e82 | 1189 | struct sta_info *sta; |
881d948c | 1190 | u32 rates, basic_rates; |
f0706e82 JB |
1191 | u16 capab_info, status_code, aid; |
1192 | struct ieee802_11_elems elems; | |
bda3933a | 1193 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1194 | u8 *pos; |
ae5eb026 | 1195 | u32 changed = 0; |
f0706e82 | 1196 | int i, j; |
ddf4ac53 | 1197 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1198 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1199 | |
1200 | /* AssocResp and ReassocResp have identical structure, so process both | |
1201 | * of them in this function. */ | |
1202 | ||
46900298 | 1203 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1204 | return; |
f0706e82 | 1205 | |
f4ea83dd | 1206 | if (len < 24 + 6) |
f0706e82 | 1207 | return; |
f0706e82 | 1208 | |
46900298 | 1209 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1210 | return; |
f0706e82 JB |
1211 | |
1212 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1213 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1214 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1215 | |
0c68ae26 | 1216 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1217 | "status=%d aid=%d)\n", |
0c68ae26 | 1218 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1219 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1220 | |
63a5ab82 JM |
1221 | pos = mgmt->u.assoc_resp.variable; |
1222 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1223 | ||
1224 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1225 | elems.timeout_int && elems.timeout_int_len == 5 && |
1226 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1227 | u32 tu, ms; |
f797eb7e | 1228 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1229 | ms = tu * 1024 / 1000; |
1230 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1231 | "comeback duration %u TU (%u ms)\n", | |
1232 | sdata->dev->name, tu, ms); | |
1233 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1234 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1235 | jiffies + msecs_to_jiffies(ms)); |
1236 | return; | |
1237 | } | |
1238 | ||
f0706e82 JB |
1239 | if (status_code != WLAN_STATUS_SUCCESS) { |
1240 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1241 | sdata->dev->name, status_code); |
8a69aa93 DD |
1242 | /* if this was a reassociation, ensure we try a "full" |
1243 | * association next time. This works around some broken APs | |
1244 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1245 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1246 | return; |
1247 | } | |
1248 | ||
1dd84aa2 JB |
1249 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1250 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1251 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1252 | aid &= ~(BIT(15) | BIT(14)); |
1253 | ||
f0706e82 JB |
1254 | if (!elems.supp_rates) { |
1255 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1256 | sdata->dev->name); |
f0706e82 JB |
1257 | return; |
1258 | } | |
1259 | ||
f698d856 | 1260 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1261 | ifmgd->aid = aid; |
1262 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1263 | |
46900298 JB |
1264 | kfree(ifmgd->assocresp_ies); |
1265 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1266 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1267 | if (ifmgd->assocresp_ies) | |
1268 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1269 | |
d0709a65 JB |
1270 | rcu_read_lock(); |
1271 | ||
f0706e82 | 1272 | /* Add STA entry for the AP */ |
46900298 | 1273 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1274 | if (!sta) { |
ddf4ac53 | 1275 | newsta = true; |
d0709a65 | 1276 | |
46900298 | 1277 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1278 | if (!sta) { |
1279 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1280 | " the AP\n", sdata->dev->name); |
d0709a65 | 1281 | rcu_read_unlock(); |
f0706e82 JB |
1282 | return; |
1283 | } | |
f709fc69 | 1284 | |
60f8b39c JB |
1285 | /* update new sta with its last rx activity */ |
1286 | sta->last_rx = jiffies; | |
f709fc69 | 1287 | } |
f709fc69 | 1288 | |
60f8b39c JB |
1289 | /* |
1290 | * FIXME: Do we really need to update the sta_info's information here? | |
1291 | * We already know about the AP (we found it in our list) so it | |
1292 | * should already be filled with the right info, no? | |
1293 | * As is stands, all this is racy because typically we assume | |
1294 | * the information that is filled in here (except flags) doesn't | |
1295 | * change while a STA structure is alive. As such, it should move | |
1296 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1297 | */ | |
f709fc69 | 1298 | |
60f8b39c JB |
1299 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1300 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1301 | |
60f8b39c JB |
1302 | rates = 0; |
1303 | basic_rates = 0; | |
1304 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1305 | |
60f8b39c JB |
1306 | for (i = 0; i < elems.supp_rates_len; i++) { |
1307 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1308 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1309 | |
60f8b39c JB |
1310 | if (rate > 110) |
1311 | have_higher_than_11mbit = true; | |
1312 | ||
1313 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1314 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1315 | rates |= BIT(j); |
d61272cb TW |
1316 | if (is_basic) |
1317 | basic_rates |= BIT(j); | |
1318 | break; | |
1319 | } | |
f709fc69 | 1320 | } |
f709fc69 LCC |
1321 | } |
1322 | ||
60f8b39c JB |
1323 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1324 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1325 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1326 | |
60f8b39c JB |
1327 | if (rate > 110) |
1328 | have_higher_than_11mbit = true; | |
f0706e82 | 1329 | |
60f8b39c | 1330 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1331 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1332 | rates |= BIT(j); |
d61272cb TW |
1333 | if (is_basic) |
1334 | basic_rates |= BIT(j); | |
1335 | break; | |
1336 | } | |
60f8b39c | 1337 | } |
1ebebea8 | 1338 | } |
f0706e82 | 1339 | |
323ce79a | 1340 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1341 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1342 | |
1343 | /* cf. IEEE 802.11 9.2.12 */ | |
1344 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1345 | have_higher_than_11mbit) | |
1346 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1347 | else | |
1348 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1349 | |
e65c2263 S |
1350 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1351 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1352 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1353 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1354 | |
1355 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1356 | |
4b7679a5 | 1357 | rate_control_rate_init(sta); |
f0706e82 | 1358 | |
46900298 | 1359 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1360 | set_sta_flags(sta, WLAN_STA_MFP); |
1361 | ||
ddf4ac53 | 1362 | if (elems.wmm_param) |
60f8b39c | 1363 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1364 | |
1365 | if (newsta) { | |
1366 | int err = sta_info_insert(sta); | |
1367 | if (err) { | |
1368 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1369 | " the AP (error %d)\n", sdata->dev->name, err); | |
1370 | rcu_read_unlock(); | |
1371 | return; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | rcu_read_unlock(); | |
1376 | ||
1377 | if (elems.wmm_param) | |
46900298 | 1378 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1379 | elems.wmm_param_len); |
f0706e82 | 1380 | |
ae5eb026 | 1381 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1382 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1383 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1384 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1385 | ap_ht_cap_flags); | |
1386 | ||
60f8b39c JB |
1387 | /* set AID and assoc capability, |
1388 | * ieee80211_set_associated() will tell the driver */ | |
1389 | bss_conf->aid = aid; | |
1390 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1391 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1392 | |
46900298 | 1393 | ieee80211_associated(sdata); |
6039f6d2 | 1394 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1395 | } |
1396 | ||
1397 | ||
98c8fccf JB |
1398 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1399 | struct ieee80211_mgmt *mgmt, | |
1400 | size_t len, | |
1401 | struct ieee80211_rx_status *rx_status, | |
1402 | struct ieee802_11_elems *elems, | |
1403 | bool beacon) | |
1404 | { | |
1405 | struct ieee80211_local *local = sdata->local; | |
1406 | int freq; | |
c2b13452 | 1407 | struct ieee80211_bss *bss; |
98c8fccf | 1408 | struct ieee80211_channel *channel; |
98c8fccf JB |
1409 | |
1410 | if (elems->ds_params && elems->ds_params_len == 1) | |
1411 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1412 | else | |
1413 | freq = rx_status->freq; | |
1414 | ||
1415 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1416 | ||
1417 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1418 | return; | |
1419 | ||
98c8fccf | 1420 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1421 | channel, beacon); |
98c8fccf JB |
1422 | if (!bss) |
1423 | return; | |
1424 | ||
c481ec97 | 1425 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1426 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1427 | struct ieee80211_channel_sw_ie *sw_elem = |
1428 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1429 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1430 | } | |
1431 | ||
3e122be0 | 1432 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1433 | } |
1434 | ||
1435 | ||
f698d856 | 1436 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1437 | struct ieee80211_mgmt *mgmt, |
1438 | size_t len, | |
1439 | struct ieee80211_rx_status *rx_status) | |
1440 | { | |
ae6a44e3 EK |
1441 | size_t baselen; |
1442 | struct ieee802_11_elems elems; | |
1443 | ||
8e7cdbb6 TW |
1444 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1445 | return; /* ignore ProbeResp to foreign address */ | |
1446 | ||
ae6a44e3 EK |
1447 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1448 | if (baselen > len) | |
1449 | return; | |
1450 | ||
1451 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1452 | &elems); | |
1453 | ||
98c8fccf | 1454 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1455 | |
1456 | /* direct probe may be part of the association flow */ | |
1457 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
46900298 | 1458 | &sdata->u.mgd.request)) { |
9859b81e RR |
1459 | printk(KERN_DEBUG "%s direct probe responded\n", |
1460 | sdata->dev->name); | |
46900298 | 1461 | ieee80211_authenticate(sdata); |
9859b81e | 1462 | } |
f0706e82 JB |
1463 | } |
1464 | ||
f698d856 | 1465 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1466 | struct ieee80211_mgmt *mgmt, |
1467 | size_t len, | |
1468 | struct ieee80211_rx_status *rx_status) | |
1469 | { | |
46900298 | 1470 | struct ieee80211_if_managed *ifmgd; |
f0706e82 JB |
1471 | size_t baselen; |
1472 | struct ieee802_11_elems elems; | |
f698d856 | 1473 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1474 | u32 changed = 0; |
1fb3606b | 1475 | bool erp_valid, directed_tim; |
7a5158ef | 1476 | u8 erp_value = 0; |
f0706e82 | 1477 | |
ae6a44e3 EK |
1478 | /* Process beacon from the current BSS */ |
1479 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1480 | if (baselen > len) | |
1481 | return; | |
1482 | ||
1483 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1484 | ||
98c8fccf | 1485 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1486 | |
05c914fe | 1487 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 | 1488 | return; |
f0706e82 | 1489 | |
46900298 JB |
1490 | ifmgd = &sdata->u.mgd; |
1491 | ||
1492 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || | |
1493 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1494 | return; |
1495 | ||
c481ec97 S |
1496 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1497 | return; | |
1498 | ||
46900298 | 1499 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1500 | elems.wmm_param_len); |
1501 | ||
25c9c875 | 1502 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
46900298 | 1503 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); |
a97b77b9 | 1504 | |
1fb3606b | 1505 | if (directed_tim) { |
572e0012 KV |
1506 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1507 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1508 | ieee80211_hw_config(local, | |
1509 | IEEE80211_CONF_CHANGE_PS); | |
1510 | ieee80211_send_nullfunc(local, sdata, 0); | |
1511 | } else { | |
1512 | local->pspolling = true; | |
1513 | ||
1514 | /* | |
1515 | * Here is assumed that the driver will be | |
1516 | * able to send ps-poll frame and receive a | |
1517 | * response even though power save mode is | |
1518 | * enabled, but some drivers might require | |
1519 | * to disable power save here. This needs | |
1520 | * to be investigated. | |
1521 | */ | |
1522 | ieee80211_send_pspoll(local, sdata); | |
1523 | } | |
a97b77b9 VN |
1524 | } |
1525 | } | |
7a5158ef JB |
1526 | |
1527 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1528 | erp_valid = true; | |
1529 | erp_value = elems.erp_info[0]; | |
1530 | } else { | |
1531 | erp_valid = false; | |
50c4afb9 | 1532 | } |
7a5158ef JB |
1533 | changed |= ieee80211_handle_bss_capability(sdata, |
1534 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1535 | erp_valid, erp_value); | |
f0706e82 | 1536 | |
d3c990fb | 1537 | |
53d6f81c | 1538 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1539 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1540 | struct sta_info *sta; |
1541 | struct ieee80211_supported_band *sband; | |
1542 | u16 ap_ht_cap_flags; | |
1543 | ||
1544 | rcu_read_lock(); | |
1545 | ||
46900298 | 1546 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1547 | if (!sta) { |
1548 | rcu_read_unlock(); | |
1549 | return; | |
1550 | } | |
1551 | ||
1552 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1553 | ||
1554 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1555 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1556 | ||
1557 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1558 | ||
1559 | rcu_read_unlock(); | |
1560 | ||
1561 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1562 | ap_ht_cap_flags); | |
d3c990fb RR |
1563 | } |
1564 | ||
3f2355cb LR |
1565 | if (elems.country_elem) { |
1566 | /* Note we are only reviewing this on beacons | |
1567 | * for the BSSID we are associated to */ | |
1568 | regulatory_hint_11d(local->hw.wiphy, | |
1569 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1570 | |
1571 | /* TODO: IBSS also needs this */ | |
1572 | if (elems.pwr_constr_elem) | |
1573 | ieee80211_handle_pwr_constr(sdata, | |
1574 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1575 | elems.pwr_constr_elem, | |
1576 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1577 | } |
1578 | ||
471b3efd | 1579 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1580 | } |
1581 | ||
46900298 JB |
1582 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1583 | struct sk_buff *skb, | |
1584 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1585 | { |
f698d856 | 1586 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1587 | struct ieee80211_mgmt *mgmt; |
1588 | u16 fc; | |
1589 | ||
1590 | if (skb->len < 24) | |
46900298 | 1591 | return RX_DROP_MONITOR; |
f0706e82 JB |
1592 | |
1593 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1594 | fc = le16_to_cpu(mgmt->frame_control); | |
1595 | ||
1596 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1597 | case IEEE80211_STYPE_PROBE_REQ: | |
1598 | case IEEE80211_STYPE_PROBE_RESP: | |
1599 | case IEEE80211_STYPE_BEACON: | |
1600 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1601 | case IEEE80211_STYPE_AUTH: | |
1602 | case IEEE80211_STYPE_ASSOC_RESP: | |
1603 | case IEEE80211_STYPE_REASSOC_RESP: | |
1604 | case IEEE80211_STYPE_DEAUTH: | |
1605 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1606 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1607 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1608 | return RX_QUEUED; | |
f0706e82 JB |
1609 | } |
1610 | ||
46900298 | 1611 | return RX_DROP_MONITOR; |
f0706e82 JB |
1612 | } |
1613 | ||
f698d856 | 1614 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1615 | struct sk_buff *skb) |
1616 | { | |
1617 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1618 | struct ieee80211_mgmt *mgmt; |
1619 | u16 fc; | |
1620 | ||
f0706e82 JB |
1621 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1622 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1623 | fc = le16_to_cpu(mgmt->frame_control); | |
1624 | ||
46900298 JB |
1625 | switch (fc & IEEE80211_FCTL_STYPE) { |
1626 | case IEEE80211_STYPE_PROBE_RESP: | |
1627 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1628 | rx_status); | |
1629 | break; | |
1630 | case IEEE80211_STYPE_BEACON: | |
1631 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1632 | rx_status); | |
1633 | break; | |
1634 | case IEEE80211_STYPE_AUTH: | |
1635 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1636 | break; | |
1637 | case IEEE80211_STYPE_ASSOC_RESP: | |
1638 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1639 | break; | |
1640 | case IEEE80211_STYPE_REASSOC_RESP: | |
1641 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1642 | break; | |
1643 | case IEEE80211_STYPE_DEAUTH: | |
1644 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1645 | break; | |
1646 | case IEEE80211_STYPE_DISASSOC: | |
1647 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1648 | break; | |
f0706e82 JB |
1649 | } |
1650 | ||
1651 | kfree_skb(skb); | |
1652 | } | |
1653 | ||
9c6bd790 | 1654 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1655 | { |
60f8b39c JB |
1656 | struct ieee80211_sub_if_data *sdata = |
1657 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1658 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1659 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1660 | |
46900298 JB |
1661 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1662 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1663 | } |
1664 | ||
46900298 | 1665 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1666 | { |
46900298 | 1667 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1668 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1669 | |
1670 | if (local->ops->reset_tsf) { | |
1671 | /* Reset own TSF to allow time synchronization work. */ | |
1672 | local->ops->reset_tsf(local_to_hw(local)); | |
1673 | } | |
1674 | ||
46900298 | 1675 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1676 | |
1677 | ||
46900298 JB |
1678 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1679 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1680 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1681 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1682 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1683 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
1684 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
1685 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 1686 | else |
46900298 JB |
1687 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
1688 | ifmgd->auth_transaction = -1; | |
1689 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1690 | ifmgd->assoc_scan_tries = 0; | |
1691 | ifmgd->direct_probe_tries = 0; | |
1692 | ifmgd->auth_tries = 0; | |
1693 | ifmgd->assoc_tries = 0; | |
24e64622 | 1694 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 1695 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
1696 | } |
1697 | ||
46900298 | 1698 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1699 | { |
46900298 | 1700 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1701 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1702 | struct ieee80211_bss *bss; |
46900298 JB |
1703 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
1704 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
1705 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
1706 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
1707 | struct ieee80211_channel *chan = local->oper_channel; | |
1708 | ||
636a5d36 JM |
1709 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1710 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
1711 | IEEE80211_STA_AUTO_BSSID_SEL | |
1712 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
1713 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
1714 | if (sdata->default_key) | |
1715 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 1716 | } |
9d139c81 | 1717 | |
46900298 | 1718 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
1719 | chan = NULL; |
1720 | ||
46900298 | 1721 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
1722 | bssid = NULL; |
1723 | ||
46900298 | 1724 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
1725 | ssid = NULL; |
1726 | ssid_len = 0; | |
1727 | } | |
1728 | ||
1729 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
1730 | bssid, ssid, ssid_len, | |
1731 | capa_mask, capa_val); | |
1732 | ||
1733 | if (bss) { | |
1734 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 1735 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
1736 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
1737 | bss->ssid_len); | |
1738 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
1739 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
1740 | bss->supp_rates); | |
46900298 JB |
1741 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
1742 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 1743 | else |
46900298 | 1744 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 1745 | |
9c6bd790 JB |
1746 | /* Send out direct probe if no probe resp was received or |
1747 | * the one we have is outdated | |
1748 | */ | |
00d3f14c JB |
1749 | if (!bss->last_probe_resp || |
1750 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 1751 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 1752 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 1753 | else |
46900298 | 1754 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 1755 | |
00d3f14c | 1756 | ieee80211_rx_bss_put(local, bss); |
46900298 | 1757 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
1758 | return 0; |
1759 | } else { | |
46900298 JB |
1760 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
1761 | ifmgd->assoc_scan_tries++; | |
2a519311 JB |
1762 | /* XXX maybe racy? */ |
1763 | if (local->scan_req) | |
1764 | return -1; | |
1765 | memcpy(local->int_scan_req.ssids[0].ssid, | |
46900298 JB |
1766 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); |
1767 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
2a519311 | 1768 | local->int_scan_req.ssids[0].ssid_len = 0; |
9c6bd790 | 1769 | else |
46900298 | 1770 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; |
af88b907 HS |
1771 | |
1772 | if (ieee80211_start_scan(sdata, &local->int_scan_req)) | |
1773 | ieee80211_scan_failed(local); | |
1774 | ||
46900298 JB |
1775 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
1776 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 1777 | } else { |
46900298 JB |
1778 | ifmgd->assoc_scan_tries = 0; |
1779 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 1780 | } |
9c6bd790 JB |
1781 | } |
1782 | return -1; | |
1783 | } | |
1784 | ||
1785 | ||
1786 | static void ieee80211_sta_work(struct work_struct *work) | |
1787 | { | |
1788 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1789 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1790 | struct ieee80211_local *local = sdata->local; |
46900298 | 1791 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1792 | struct sk_buff *skb; |
1793 | ||
1794 | if (!netif_running(sdata->dev)) | |
1795 | return; | |
1796 | ||
c2b13452 | 1797 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
1798 | return; |
1799 | ||
46900298 | 1800 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1801 | return; |
46900298 | 1802 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1803 | |
46900298 | 1804 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1805 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1806 | ||
46900298 JB |
1807 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
1808 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
1809 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
1810 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
af88b907 HS |
1811 | /* |
1812 | * The call to ieee80211_start_scan can fail but ieee80211_request_scan | |
1813 | * (which queued ieee80211_sta_work) did not return an error. Thus, call | |
1814 | * ieee80211_scan_failed here if ieee80211_start_scan fails in order to | |
1815 | * notify the scan requester. | |
1816 | */ | |
1817 | if (ieee80211_start_scan(sdata, local->scan_req)) | |
1818 | ieee80211_scan_failed(local); | |
9c6bd790 | 1819 | return; |
f0706e82 JB |
1820 | } |
1821 | ||
46900298 JB |
1822 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
1823 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 1824 | return; |
46900298 JB |
1825 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1826 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 1827 | return; |
d6f2da5b | 1828 | |
46900298 | 1829 | switch (ifmgd->state) { |
9c6bd790 JB |
1830 | case IEEE80211_STA_MLME_DISABLED: |
1831 | break; | |
1832 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 1833 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
1834 | break; |
1835 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 1836 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
1837 | break; |
1838 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 1839 | ieee80211_associate(sdata); |
9c6bd790 JB |
1840 | break; |
1841 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 1842 | ieee80211_associated(sdata); |
9c6bd790 JB |
1843 | break; |
1844 | default: | |
1845 | WARN_ON(1); | |
1846 | break; | |
1847 | } | |
1848 | ||
46900298 | 1849 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
1850 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
1851 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
1852 | ||
46900298 | 1853 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
1854 | WLAN_REASON_UNSPECIFIED); |
1855 | } | |
f0706e82 JB |
1856 | } |
1857 | ||
9c6bd790 JB |
1858 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1859 | { | |
05c914fe | 1860 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 | 1861 | queue_work(sdata->local->hw.workqueue, |
46900298 | 1862 | &sdata->u.mgd.work); |
9c6bd790 | 1863 | } |
f0706e82 | 1864 | |
9c6bd790 JB |
1865 | /* interface setup */ |
1866 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1867 | { |
46900298 | 1868 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1869 | |
46900298 JB |
1870 | ifmgd = &sdata->u.mgd; |
1871 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
1872 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
1873 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, | |
c481ec97 | 1874 | (unsigned long) sdata); |
46900298 | 1875 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1876 | (unsigned long) sdata); |
46900298 | 1877 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1878 | |
46900298 JB |
1879 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
1880 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 1881 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 1882 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
1883 | IEEE80211_STA_AUTO_BSSID_SEL | |
1884 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 1885 | if (sdata->local->hw.queues >= 4) |
46900298 | 1886 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
f0706e82 JB |
1887 | } |
1888 | ||
9c6bd790 | 1889 | /* configuration hooks */ |
46900298 | 1890 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 1891 | { |
46900298 | 1892 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1893 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 1894 | |
46900298 | 1895 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1896 | return; |
60f8b39c | 1897 | |
46900298 | 1898 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 1899 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 1900 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 1901 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 1902 | |
46900298 JB |
1903 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
1904 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 1905 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 1906 | |
636a5d36 JM |
1907 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
1908 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
1909 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
1910 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
1911 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 1912 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
1913 | } |
1914 | } | |
60f8b39c | 1915 | |
79f6440c AF |
1916 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
1917 | { | |
1918 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1919 | ||
79f6440c AF |
1920 | if (ifmgd->ssid_len) |
1921 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
1922 | else | |
1923 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
1924 | ||
1925 | return 0; | |
1926 | } | |
1927 | ||
9c6bd790 JB |
1928 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
1929 | { | |
46900298 | 1930 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 1931 | |
9c6bd790 JB |
1932 | if (len > IEEE80211_MAX_SSID_LEN) |
1933 | return -EINVAL; | |
1934 | ||
46900298 | 1935 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 1936 | |
46900298 | 1937 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
1938 | /* |
1939 | * Do not use reassociation if SSID is changed (different ESS). | |
1940 | */ | |
1941 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
1942 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
1943 | memcpy(ifmgd->ssid, ssid, len); | |
1944 | ifmgd->ssid_len = len; | |
60f8b39c | 1945 | } |
60f8b39c | 1946 | |
79f6440c | 1947 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
1948 | } |
1949 | ||
1950 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
1951 | { | |
46900298 JB |
1952 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1953 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
1954 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
1955 | return 0; |
1956 | } | |
1957 | ||
1958 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
1959 | { | |
46900298 | 1960 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 1961 | |
dfe67012 | 1962 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
1963 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
1964 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 1965 | } else { |
46900298 JB |
1966 | memset(ifmgd->bssid, 0, ETH_ALEN); |
1967 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
1968 | } |
1969 | ||
1970 | if (netif_running(sdata->dev)) { | |
1971 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
9c6bd790 JB |
1972 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
1973 | "the low-level driver\n", sdata->dev->name); | |
9c6bd790 JB |
1974 | } |
1975 | } | |
60f8b39c | 1976 | |
79f6440c | 1977 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
1978 | } |
1979 | ||
636a5d36 JM |
1980 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
1981 | const char *ie, size_t len) | |
9c6bd790 | 1982 | { |
46900298 | 1983 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 1984 | |
46900298 | 1985 | kfree(ifmgd->extra_ie); |
9c6bd790 | 1986 | if (len == 0) { |
46900298 JB |
1987 | ifmgd->extra_ie = NULL; |
1988 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 1989 | return 0; |
60f8b39c | 1990 | } |
46900298 JB |
1991 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
1992 | if (!ifmgd->extra_ie) { | |
1993 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
1994 | return -ENOMEM; |
1995 | } | |
46900298 JB |
1996 | memcpy(ifmgd->extra_ie, ie, len); |
1997 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 1998 | return 0; |
60f8b39c JB |
1999 | } |
2000 | ||
f698d856 | 2001 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2002 | { |
f4ea83dd | 2003 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2004 | sdata->dev->name, reason); |
f0706e82 | 2005 | |
46900298 | 2006 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2007 | return -EINVAL; |
2008 | ||
46900298 | 2009 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2010 | return 0; |
2011 | } | |
2012 | ||
f698d856 | 2013 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2014 | { |
46900298 | 2015 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2016 | |
f4ea83dd | 2017 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2018 | sdata->dev->name, reason); |
f0706e82 | 2019 | |
05c914fe | 2020 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
2021 | return -EINVAL; |
2022 | ||
46900298 JB |
2023 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2024 | return -ENOLINK; | |
f0706e82 | 2025 | |
46900298 | 2026 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2027 | return 0; |
2028 | } | |
84363e6e | 2029 | |
9c6bd790 JB |
2030 | /* scan finished notification */ |
2031 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2032 | { | |
2033 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2034 | |
2035 | /* Restart STA timers */ | |
2036 | rcu_read_lock(); | |
2037 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2038 | ieee80211_restart_sta_timer(sdata); | |
2039 | rcu_read_unlock(); | |
2040 | } | |
520eb820 KV |
2041 | |
2042 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2043 | { | |
2044 | struct ieee80211_local *local = | |
2045 | container_of(work, struct ieee80211_local, | |
2046 | dynamic_ps_disable_work); | |
2047 | ||
2048 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2049 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2050 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2051 | } | |
2052 | ||
2053 | ieee80211_wake_queues_by_reason(&local->hw, | |
2054 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2055 | } | |
2056 | ||
2057 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2058 | { | |
2059 | struct ieee80211_local *local = | |
2060 | container_of(work, struct ieee80211_local, | |
2061 | dynamic_ps_enable_work); | |
a97b77b9 | 2062 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
520eb820 KV |
2063 | |
2064 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2065 | return; | |
2066 | ||
4be8c387 JB |
2067 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
2068 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 2069 | |
4be8c387 | 2070 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
520eb820 KV |
2071 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
2072 | } | |
2073 | ||
2074 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2075 | { | |
2076 | struct ieee80211_local *local = (void *) data; | |
2077 | ||
2078 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2079 | } | |
46900298 JB |
2080 | |
2081 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2082 | struct ieee80211_sub_if_data *sdata, | |
2083 | int powersave) | |
2084 | { | |
2085 | struct sk_buff *skb; | |
2086 | struct ieee80211_hdr *nullfunc; | |
2087 | __le16 fc; | |
2088 | ||
2089 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2090 | return; | |
2091 | ||
2092 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2093 | if (!skb) { | |
2094 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2095 | "frame\n", sdata->dev->name); | |
2096 | return; | |
2097 | } | |
2098 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2099 | ||
2100 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2101 | memset(nullfunc, 0, 24); | |
2102 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2103 | IEEE80211_FCTL_TODS); | |
2104 | if (powersave) | |
2105 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
2106 | nullfunc->frame_control = fc; | |
2107 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2108 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2109 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2110 | ||
2111 | ieee80211_tx_skb(sdata, skb, 0); | |
2112 | } |