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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; |
46900298 JB |
733 | |
734 | ifmgd->auth_tries++; | |
735 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 736 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 737 | " timed out\n", |
46900298 JB |
738 | sdata->dev->name, ifmgd->bssid); |
739 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
740 | ieee80211_sta_send_apinfo(sdata); | |
741 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 742 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 743 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
744 | |
745 | /* | |
746 | * We might have a pending scan which had no chance to run yet | |
747 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
748 | * Hence, queue the STAs work again | |
749 | */ | |
750 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
751 | return; |
752 | } | |
f0706e82 | 753 | |
46900298 | 754 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 755 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 756 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 757 | |
46900298 JB |
758 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, NULL, 0, |
759 | ifmgd->bssid, 0); | |
760 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 761 | |
46900298 | 762 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
763 | } |
764 | ||
5925d976 VN |
765 | /* |
766 | * The disassoc 'reason' argument can be either our own reason | |
767 | * if self disconnected or a reason code from the AP. | |
768 | */ | |
aa458d17 | 769 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
770 | bool deauth, bool self_disconnected, |
771 | u16 reason) | |
aa458d17 | 772 | { |
46900298 | 773 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 TW |
774 | struct ieee80211_local *local = sdata->local; |
775 | struct sta_info *sta; | |
e0cb686f | 776 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
777 | |
778 | rcu_read_lock(); | |
779 | ||
46900298 | 780 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
781 | if (!sta) { |
782 | rcu_read_unlock(); | |
783 | return; | |
784 | } | |
785 | ||
786 | if (deauth) { | |
46900298 JB |
787 | ifmgd->direct_probe_tries = 0; |
788 | ifmgd->auth_tries = 0; | |
aa458d17 | 789 | } |
46900298 JB |
790 | ifmgd->assoc_scan_tries = 0; |
791 | ifmgd->assoc_tries = 0; | |
aa458d17 | 792 | |
24e64622 | 793 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
794 | netif_carrier_off(sdata->dev); |
795 | ||
2dace10e | 796 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 TW |
797 | |
798 | if (self_disconnected) { | |
799 | if (deauth) | |
ef422bc0 JB |
800 | ieee80211_send_deauth_disassoc(sdata, |
801 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 802 | else |
ef422bc0 JB |
803 | ieee80211_send_deauth_disassoc(sdata, |
804 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
805 | } |
806 | ||
46900298 | 807 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
808 | changed |= ieee80211_reset_erp_info(sdata); |
809 | ||
f5e5bf25 | 810 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
811 | changed |= BSS_CHANGED_ASSOC; |
812 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 813 | |
46900298 | 814 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 815 | |
7a947080 | 816 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
817 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
818 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 819 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 820 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 821 | } |
aa458d17 | 822 | |
aa458d17 TW |
823 | rcu_read_unlock(); |
824 | ||
4797938c | 825 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 826 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 827 | |
a8302de9 VT |
828 | local->power_constr_level = 0; |
829 | ||
520eb820 KV |
830 | del_timer_sync(&local->dynamic_ps_timer); |
831 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
832 | ||
e0cb686f KV |
833 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
834 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
835 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
836 | } | |
ae5eb026 | 837 | |
e0cb686f | 838 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 839 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
840 | |
841 | rcu_read_lock(); | |
842 | ||
46900298 | 843 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
844 | if (!sta) { |
845 | rcu_read_unlock(); | |
846 | return; | |
847 | } | |
848 | ||
849 | sta_info_unlink(&sta); | |
850 | ||
851 | rcu_read_unlock(); | |
852 | ||
853 | sta_info_destroy(sta); | |
aa458d17 | 854 | } |
f0706e82 | 855 | |
9ac19a90 JB |
856 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
857 | { | |
858 | if (!sdata || !sdata->default_key || | |
859 | sdata->default_key->conf.alg != ALG_WEP) | |
860 | return 0; | |
861 | return 1; | |
862 | } | |
863 | ||
46900298 | 864 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 865 | { |
46900298 | 866 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 867 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 868 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
869 | int bss_privacy; |
870 | int wep_privacy; | |
871 | int privacy_invoked; | |
f0706e82 | 872 | |
46900298 | 873 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
874 | return 0; |
875 | ||
46900298 | 876 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 877 | local->hw.conf.channel->center_freq, |
46900298 | 878 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
879 | if (!bss) |
880 | return 0; | |
881 | ||
00d3f14c | 882 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 883 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 884 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 885 | |
3e122be0 | 886 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 887 | |
5b98b1f7 JB |
888 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
889 | return 0; | |
890 | ||
891 | return 1; | |
f0706e82 JB |
892 | } |
893 | ||
46900298 | 894 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 895 | { |
46900298 | 896 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 897 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
898 | |
899 | ifmgd->assoc_tries++; | |
900 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 901 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 902 | " timed out\n", |
46900298 JB |
903 | sdata->dev->name, ifmgd->bssid); |
904 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
905 | ieee80211_sta_send_apinfo(sdata); | |
906 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 907 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 908 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
909 | /* |
910 | * We might have a pending scan which had no chance to run yet | |
911 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
912 | * Hence, queue the STAs work again | |
913 | */ | |
914 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
915 | return; |
916 | } | |
917 | ||
46900298 | 918 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 919 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
920 | sdata->dev->name, ifmgd->bssid); |
921 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 922 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 923 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 924 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
925 | return; |
926 | } | |
927 | ||
46900298 | 928 | ieee80211_send_assoc(sdata); |
f0706e82 | 929 | |
46900298 | 930 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
931 | } |
932 | ||
933 | ||
46900298 | 934 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 935 | { |
46900298 | 936 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 937 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
938 | struct sta_info *sta; |
939 | int disassoc; | |
940 | ||
941 | /* TODO: start monitoring current AP signal quality and number of | |
942 | * missed beacons. Scan other channels every now and then and search | |
943 | * for better APs. */ | |
944 | /* TODO: remove expired BSSes */ | |
945 | ||
46900298 | 946 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 947 | |
d0709a65 JB |
948 | rcu_read_lock(); |
949 | ||
46900298 | 950 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 951 | if (!sta) { |
0c68ae26 | 952 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 953 | sdata->dev->name, ifmgd->bssid); |
f0706e82 JB |
954 | disassoc = 1; |
955 | } else { | |
956 | disassoc = 0; | |
957 | if (time_after(jiffies, | |
958 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
46900298 | 959 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 960 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0c68ae26 | 961 | "current AP %pM - assume out of " |
f0706e82 | 962 | "range\n", |
46900298 | 963 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 964 | disassoc = 1; |
d6f2da5b | 965 | } else |
46900298 JB |
966 | ieee80211_send_probe_req(sdata, ifmgd->bssid, |
967 | ifmgd->ssid, | |
70692ad2 JM |
968 | ifmgd->ssid_len, |
969 | NULL, 0); | |
46900298 | 970 | ifmgd->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 971 | } else { |
46900298 JB |
972 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
973 | if (time_after(jiffies, ifmgd->last_probe + | |
f0706e82 | 974 | IEEE80211_PROBE_INTERVAL)) { |
46900298 JB |
975 | ifmgd->last_probe = jiffies; |
976 | ieee80211_send_probe_req(sdata, ifmgd->bssid, | |
977 | ifmgd->ssid, | |
70692ad2 JM |
978 | ifmgd->ssid_len, |
979 | NULL, 0); | |
f0706e82 JB |
980 | } |
981 | } | |
f0706e82 | 982 | } |
d0709a65 JB |
983 | |
984 | rcu_read_unlock(); | |
985 | ||
7a947080 | 986 | if (disassoc) |
46900298 | 987 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 988 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 989 | else |
46900298 | 990 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 991 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
992 | } |
993 | ||
994 | ||
46900298 | 995 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 996 | { |
46900298 JB |
997 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
998 | ||
f698d856 | 999 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 JB |
1000 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
1001 | ieee80211_associate(sdata); | |
f0706e82 JB |
1002 | } |
1003 | ||
1004 | ||
f698d856 | 1005 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1006 | struct ieee80211_mgmt *mgmt, |
1007 | size_t len) | |
1008 | { | |
1009 | u8 *pos; | |
1010 | struct ieee802_11_elems elems; | |
1011 | ||
f0706e82 | 1012 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1013 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1014 | if (!elems.challenge) |
f0706e82 | 1015 | return; |
46900298 JB |
1016 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1017 | elems.challenge - 2, elems.challenge_len + 2, | |
1018 | sdata->u.mgd.bssid, 1); | |
1019 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1020 | } |
1021 | ||
f698d856 | 1022 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1023 | struct ieee80211_mgmt *mgmt, |
1024 | size_t len) | |
1025 | { | |
46900298 | 1026 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1027 | u16 auth_alg, auth_transaction, status_code; |
1028 | ||
46900298 | 1029 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1030 | return; |
f0706e82 | 1031 | |
f4ea83dd | 1032 | if (len < 24 + 6) |
f0706e82 | 1033 | return; |
f0706e82 | 1034 | |
46900298 | 1035 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1036 | return; |
f0706e82 | 1037 | |
46900298 | 1038 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1039 | return; |
f0706e82 JB |
1040 | |
1041 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1042 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1043 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1044 | ||
46900298 JB |
1045 | if (auth_alg != ifmgd->auth_alg || |
1046 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1047 | return; |
f0706e82 JB |
1048 | |
1049 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1050 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1051 | u8 algs[3]; | |
1052 | const int num_algs = ARRAY_SIZE(algs); | |
1053 | int i, pos; | |
1054 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1055 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1056 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1057 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1058 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1059 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1060 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1061 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1062 | pos = 0; |
46900298 | 1063 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1064 | pos = 1; |
1065 | else | |
1066 | pos = 2; | |
1067 | for (i = 0; i < num_algs; i++) { | |
1068 | pos++; | |
1069 | if (pos >= num_algs) | |
1070 | pos = 0; | |
46900298 | 1071 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1072 | algs[pos] == 0xff) |
1073 | continue; | |
1074 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1075 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1076 | continue; |
46900298 | 1077 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1078 | break; |
1079 | } | |
1080 | } | |
1081 | return; | |
1082 | } | |
1083 | ||
46900298 | 1084 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1085 | case WLAN_AUTH_OPEN: |
1086 | case WLAN_AUTH_LEAP: | |
46900298 | 1087 | ieee80211_auth_completed(sdata); |
f0706e82 JB |
1088 | break; |
1089 | case WLAN_AUTH_SHARED_KEY: | |
46900298 JB |
1090 | if (ifmgd->auth_transaction == 4) |
1091 | ieee80211_auth_completed(sdata); | |
f0706e82 | 1092 | else |
46900298 | 1093 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1094 | break; |
1095 | } | |
1096 | } | |
1097 | ||
1098 | ||
f698d856 | 1099 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1100 | struct ieee80211_mgmt *mgmt, |
1101 | size_t len) | |
1102 | { | |
46900298 | 1103 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1104 | u16 reason_code; |
1105 | ||
f4ea83dd | 1106 | if (len < 24 + 2) |
f0706e82 | 1107 | return; |
f0706e82 | 1108 | |
46900298 | 1109 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1110 | return; |
f0706e82 JB |
1111 | |
1112 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1113 | ||
46900298 | 1114 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1115 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1116 | sdata->dev->name, reason_code); | |
f0706e82 | 1117 | |
46900298 JB |
1118 | if (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1119 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1120 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
1121 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
1122 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1123 | IEEE80211_RETRY_AUTH_INTERVAL); |
1124 | } | |
1125 | ||
46900298 JB |
1126 | ieee80211_set_disassoc(sdata, true, false, 0); |
1127 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
f0706e82 JB |
1128 | } |
1129 | ||
1130 | ||
f698d856 | 1131 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1132 | struct ieee80211_mgmt *mgmt, |
1133 | size_t len) | |
1134 | { | |
46900298 | 1135 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1136 | u16 reason_code; |
1137 | ||
f4ea83dd | 1138 | if (len < 24 + 2) |
f0706e82 | 1139 | return; |
f0706e82 | 1140 | |
46900298 | 1141 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1142 | return; |
f0706e82 JB |
1143 | |
1144 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1145 | ||
46900298 | 1146 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1147 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1148 | sdata->dev->name, reason_code); | |
f0706e82 | 1149 | |
46900298 JB |
1150 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1151 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; | |
1152 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1153 | IEEE80211_RETRY_AUTH_INTERVAL); |
1154 | } | |
1155 | ||
46900298 | 1156 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
f0706e82 JB |
1157 | } |
1158 | ||
1159 | ||
471b3efd | 1160 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1161 | struct ieee80211_mgmt *mgmt, |
1162 | size_t len, | |
1163 | int reassoc) | |
1164 | { | |
46900298 | 1165 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1166 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1167 | struct ieee80211_supported_band *sband; |
f0706e82 | 1168 | struct sta_info *sta; |
881d948c | 1169 | u32 rates, basic_rates; |
f0706e82 JB |
1170 | u16 capab_info, status_code, aid; |
1171 | struct ieee802_11_elems elems; | |
bda3933a | 1172 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1173 | u8 *pos; |
ae5eb026 | 1174 | u32 changed = 0; |
f0706e82 | 1175 | int i, j; |
ddf4ac53 | 1176 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1177 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1178 | |
1179 | /* AssocResp and ReassocResp have identical structure, so process both | |
1180 | * of them in this function. */ | |
1181 | ||
46900298 | 1182 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1183 | return; |
f0706e82 | 1184 | |
f4ea83dd | 1185 | if (len < 24 + 6) |
f0706e82 | 1186 | return; |
f0706e82 | 1187 | |
46900298 | 1188 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1189 | return; |
f0706e82 JB |
1190 | |
1191 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1192 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1193 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1194 | |
0c68ae26 | 1195 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1196 | "status=%d aid=%d)\n", |
0c68ae26 | 1197 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1198 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1199 | |
63a5ab82 JM |
1200 | pos = mgmt->u.assoc_resp.variable; |
1201 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1202 | ||
1203 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1204 | elems.timeout_int && elems.timeout_int_len == 5 && |
1205 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1206 | u32 tu, ms; |
f797eb7e | 1207 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1208 | ms = tu * 1024 / 1000; |
1209 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1210 | "comeback duration %u TU (%u ms)\n", | |
1211 | sdata->dev->name, tu, ms); | |
1212 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1213 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1214 | jiffies + msecs_to_jiffies(ms)); |
1215 | return; | |
1216 | } | |
1217 | ||
f0706e82 JB |
1218 | if (status_code != WLAN_STATUS_SUCCESS) { |
1219 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1220 | sdata->dev->name, status_code); |
8a69aa93 DD |
1221 | /* if this was a reassociation, ensure we try a "full" |
1222 | * association next time. This works around some broken APs | |
1223 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1224 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1225 | return; |
1226 | } | |
1227 | ||
1dd84aa2 JB |
1228 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1229 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1230 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1231 | aid &= ~(BIT(15) | BIT(14)); |
1232 | ||
f0706e82 JB |
1233 | if (!elems.supp_rates) { |
1234 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1235 | sdata->dev->name); |
f0706e82 JB |
1236 | return; |
1237 | } | |
1238 | ||
f698d856 | 1239 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1240 | ifmgd->aid = aid; |
1241 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1242 | |
46900298 JB |
1243 | kfree(ifmgd->assocresp_ies); |
1244 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1245 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1246 | if (ifmgd->assocresp_ies) | |
1247 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1248 | |
d0709a65 JB |
1249 | rcu_read_lock(); |
1250 | ||
f0706e82 | 1251 | /* Add STA entry for the AP */ |
46900298 | 1252 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1253 | if (!sta) { |
ddf4ac53 | 1254 | newsta = true; |
d0709a65 | 1255 | |
46900298 | 1256 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1257 | if (!sta) { |
1258 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1259 | " the AP\n", sdata->dev->name); |
d0709a65 | 1260 | rcu_read_unlock(); |
f0706e82 JB |
1261 | return; |
1262 | } | |
f709fc69 | 1263 | |
60f8b39c JB |
1264 | /* update new sta with its last rx activity */ |
1265 | sta->last_rx = jiffies; | |
f709fc69 | 1266 | } |
f709fc69 | 1267 | |
60f8b39c JB |
1268 | /* |
1269 | * FIXME: Do we really need to update the sta_info's information here? | |
1270 | * We already know about the AP (we found it in our list) so it | |
1271 | * should already be filled with the right info, no? | |
1272 | * As is stands, all this is racy because typically we assume | |
1273 | * the information that is filled in here (except flags) doesn't | |
1274 | * change while a STA structure is alive. As such, it should move | |
1275 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1276 | */ | |
f709fc69 | 1277 | |
60f8b39c JB |
1278 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1279 | WLAN_STA_AUTHORIZED); | |
05e5e883 | 1280 | |
60f8b39c JB |
1281 | rates = 0; |
1282 | basic_rates = 0; | |
1283 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1284 | |
60f8b39c JB |
1285 | for (i = 0; i < elems.supp_rates_len; i++) { |
1286 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1287 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1288 | |
60f8b39c JB |
1289 | if (rate > 110) |
1290 | have_higher_than_11mbit = true; | |
1291 | ||
1292 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1293 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1294 | rates |= BIT(j); |
d61272cb TW |
1295 | if (is_basic) |
1296 | basic_rates |= BIT(j); | |
1297 | break; | |
1298 | } | |
f709fc69 | 1299 | } |
f709fc69 LCC |
1300 | } |
1301 | ||
60f8b39c JB |
1302 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1303 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1304 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f0706e82 | 1305 | |
60f8b39c JB |
1306 | if (rate > 110) |
1307 | have_higher_than_11mbit = true; | |
f0706e82 | 1308 | |
60f8b39c | 1309 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1310 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1311 | rates |= BIT(j); |
d61272cb TW |
1312 | if (is_basic) |
1313 | basic_rates |= BIT(j); | |
1314 | break; | |
1315 | } | |
60f8b39c | 1316 | } |
1ebebea8 | 1317 | } |
f0706e82 | 1318 | |
323ce79a | 1319 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1320 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1321 | |
1322 | /* cf. IEEE 802.11 9.2.12 */ | |
1323 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1324 | have_higher_than_11mbit) | |
1325 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1326 | else | |
1327 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1328 | |
e65c2263 S |
1329 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1330 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1331 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1332 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1333 | |
1334 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1335 | |
4b7679a5 | 1336 | rate_control_rate_init(sta); |
f0706e82 | 1337 | |
46900298 | 1338 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1339 | set_sta_flags(sta, WLAN_STA_MFP); |
1340 | ||
ddf4ac53 | 1341 | if (elems.wmm_param) |
60f8b39c | 1342 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1343 | |
1344 | if (newsta) { | |
1345 | int err = sta_info_insert(sta); | |
1346 | if (err) { | |
1347 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1348 | " the AP (error %d)\n", sdata->dev->name, err); | |
1349 | rcu_read_unlock(); | |
1350 | return; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | rcu_read_unlock(); | |
1355 | ||
1356 | if (elems.wmm_param) | |
46900298 | 1357 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1358 | elems.wmm_param_len); |
f0706e82 | 1359 | |
ae5eb026 | 1360 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1361 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1362 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1363 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1364 | ap_ht_cap_flags); | |
1365 | ||
60f8b39c JB |
1366 | /* set AID and assoc capability, |
1367 | * ieee80211_set_associated() will tell the driver */ | |
1368 | bss_conf->aid = aid; | |
1369 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1370 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1371 | |
46900298 | 1372 | ieee80211_associated(sdata); |
f0706e82 JB |
1373 | } |
1374 | ||
1375 | ||
98c8fccf JB |
1376 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1377 | struct ieee80211_mgmt *mgmt, | |
1378 | size_t len, | |
1379 | struct ieee80211_rx_status *rx_status, | |
1380 | struct ieee802_11_elems *elems, | |
1381 | bool beacon) | |
1382 | { | |
1383 | struct ieee80211_local *local = sdata->local; | |
1384 | int freq; | |
c2b13452 | 1385 | struct ieee80211_bss *bss; |
98c8fccf | 1386 | struct ieee80211_channel *channel; |
98c8fccf JB |
1387 | |
1388 | if (elems->ds_params && elems->ds_params_len == 1) | |
1389 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1390 | else | |
1391 | freq = rx_status->freq; | |
1392 | ||
1393 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1394 | ||
1395 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1396 | return; | |
1397 | ||
98c8fccf | 1398 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1399 | channel, beacon); |
98c8fccf JB |
1400 | if (!bss) |
1401 | return; | |
1402 | ||
c481ec97 | 1403 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1404 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1405 | struct ieee80211_channel_sw_ie *sw_elem = |
1406 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1407 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1408 | } | |
1409 | ||
3e122be0 | 1410 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1411 | } |
1412 | ||
1413 | ||
f698d856 | 1414 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1415 | struct ieee80211_mgmt *mgmt, |
1416 | size_t len, | |
1417 | struct ieee80211_rx_status *rx_status) | |
1418 | { | |
ae6a44e3 EK |
1419 | size_t baselen; |
1420 | struct ieee802_11_elems elems; | |
1421 | ||
8e7cdbb6 TW |
1422 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1423 | return; /* ignore ProbeResp to foreign address */ | |
1424 | ||
ae6a44e3 EK |
1425 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1426 | if (baselen > len) | |
1427 | return; | |
1428 | ||
1429 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1430 | &elems); | |
1431 | ||
98c8fccf | 1432 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1433 | |
1434 | /* direct probe may be part of the association flow */ | |
1435 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
46900298 | 1436 | &sdata->u.mgd.request)) { |
9859b81e RR |
1437 | printk(KERN_DEBUG "%s direct probe responded\n", |
1438 | sdata->dev->name); | |
46900298 | 1439 | ieee80211_authenticate(sdata); |
9859b81e | 1440 | } |
f0706e82 JB |
1441 | } |
1442 | ||
f698d856 | 1443 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1444 | struct ieee80211_mgmt *mgmt, |
1445 | size_t len, | |
1446 | struct ieee80211_rx_status *rx_status) | |
1447 | { | |
46900298 | 1448 | struct ieee80211_if_managed *ifmgd; |
f0706e82 JB |
1449 | size_t baselen; |
1450 | struct ieee802_11_elems elems; | |
f698d856 | 1451 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1452 | u32 changed = 0; |
1fb3606b | 1453 | bool erp_valid, directed_tim; |
7a5158ef | 1454 | u8 erp_value = 0; |
f0706e82 | 1455 | |
ae6a44e3 EK |
1456 | /* Process beacon from the current BSS */ |
1457 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1458 | if (baselen > len) | |
1459 | return; | |
1460 | ||
1461 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
1462 | ||
98c8fccf | 1463 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
f0706e82 | 1464 | |
05c914fe | 1465 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 | 1466 | return; |
f0706e82 | 1467 | |
46900298 JB |
1468 | ifmgd = &sdata->u.mgd; |
1469 | ||
1470 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || | |
1471 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1472 | return; |
1473 | ||
c481ec97 S |
1474 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
1475 | return; | |
1476 | ||
46900298 | 1477 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1478 | elems.wmm_param_len); |
1479 | ||
25c9c875 | 1480 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
46900298 | 1481 | directed_tim = ieee80211_check_tim(&elems, ifmgd->aid); |
a97b77b9 | 1482 | |
1fb3606b | 1483 | if (directed_tim) { |
572e0012 KV |
1484 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1485 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1486 | ieee80211_hw_config(local, | |
1487 | IEEE80211_CONF_CHANGE_PS); | |
1488 | ieee80211_send_nullfunc(local, sdata, 0); | |
1489 | } else { | |
1490 | local->pspolling = true; | |
1491 | ||
1492 | /* | |
1493 | * Here is assumed that the driver will be | |
1494 | * able to send ps-poll frame and receive a | |
1495 | * response even though power save mode is | |
1496 | * enabled, but some drivers might require | |
1497 | * to disable power save here. This needs | |
1498 | * to be investigated. | |
1499 | */ | |
1500 | ieee80211_send_pspoll(local, sdata); | |
1501 | } | |
a97b77b9 VN |
1502 | } |
1503 | } | |
7a5158ef JB |
1504 | |
1505 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1506 | erp_valid = true; | |
1507 | erp_value = elems.erp_info[0]; | |
1508 | } else { | |
1509 | erp_valid = false; | |
50c4afb9 | 1510 | } |
7a5158ef JB |
1511 | changed |= ieee80211_handle_bss_capability(sdata, |
1512 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1513 | erp_valid, erp_value); | |
f0706e82 | 1514 | |
d3c990fb | 1515 | |
53d6f81c | 1516 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1517 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1518 | struct sta_info *sta; |
1519 | struct ieee80211_supported_band *sband; | |
1520 | u16 ap_ht_cap_flags; | |
1521 | ||
1522 | rcu_read_lock(); | |
1523 | ||
46900298 | 1524 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1525 | if (!sta) { |
1526 | rcu_read_unlock(); | |
1527 | return; | |
1528 | } | |
1529 | ||
1530 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1531 | ||
1532 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1533 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1534 | ||
1535 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1536 | ||
1537 | rcu_read_unlock(); | |
1538 | ||
1539 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1540 | ap_ht_cap_flags); | |
d3c990fb RR |
1541 | } |
1542 | ||
3f2355cb LR |
1543 | if (elems.country_elem) { |
1544 | /* Note we are only reviewing this on beacons | |
1545 | * for the BSSID we are associated to */ | |
1546 | regulatory_hint_11d(local->hw.wiphy, | |
1547 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1548 | |
1549 | /* TODO: IBSS also needs this */ | |
1550 | if (elems.pwr_constr_elem) | |
1551 | ieee80211_handle_pwr_constr(sdata, | |
1552 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1553 | elems.pwr_constr_elem, | |
1554 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1555 | } |
1556 | ||
471b3efd | 1557 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1558 | } |
1559 | ||
46900298 JB |
1560 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1561 | struct sk_buff *skb, | |
1562 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1563 | { |
f698d856 | 1564 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1565 | struct ieee80211_mgmt *mgmt; |
1566 | u16 fc; | |
1567 | ||
1568 | if (skb->len < 24) | |
46900298 | 1569 | return RX_DROP_MONITOR; |
f0706e82 JB |
1570 | |
1571 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1572 | fc = le16_to_cpu(mgmt->frame_control); | |
1573 | ||
1574 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1575 | case IEEE80211_STYPE_PROBE_REQ: | |
1576 | case IEEE80211_STYPE_PROBE_RESP: | |
1577 | case IEEE80211_STYPE_BEACON: | |
1578 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1579 | case IEEE80211_STYPE_AUTH: | |
1580 | case IEEE80211_STYPE_ASSOC_RESP: | |
1581 | case IEEE80211_STYPE_REASSOC_RESP: | |
1582 | case IEEE80211_STYPE_DEAUTH: | |
1583 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1584 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1585 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1586 | return RX_QUEUED; | |
f0706e82 JB |
1587 | } |
1588 | ||
46900298 | 1589 | return RX_DROP_MONITOR; |
f0706e82 JB |
1590 | } |
1591 | ||
f698d856 | 1592 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1593 | struct sk_buff *skb) |
1594 | { | |
1595 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1596 | struct ieee80211_mgmt *mgmt; |
1597 | u16 fc; | |
1598 | ||
f0706e82 JB |
1599 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1600 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1601 | fc = le16_to_cpu(mgmt->frame_control); | |
1602 | ||
46900298 JB |
1603 | switch (fc & IEEE80211_FCTL_STYPE) { |
1604 | case IEEE80211_STYPE_PROBE_RESP: | |
1605 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1606 | rx_status); | |
1607 | break; | |
1608 | case IEEE80211_STYPE_BEACON: | |
1609 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1610 | rx_status); | |
1611 | break; | |
1612 | case IEEE80211_STYPE_AUTH: | |
1613 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1614 | break; | |
1615 | case IEEE80211_STYPE_ASSOC_RESP: | |
1616 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1617 | break; | |
1618 | case IEEE80211_STYPE_REASSOC_RESP: | |
1619 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1620 | break; | |
1621 | case IEEE80211_STYPE_DEAUTH: | |
1622 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1623 | break; | |
1624 | case IEEE80211_STYPE_DISASSOC: | |
1625 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1626 | break; | |
f0706e82 JB |
1627 | } |
1628 | ||
1629 | kfree_skb(skb); | |
1630 | } | |
1631 | ||
9c6bd790 | 1632 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1633 | { |
60f8b39c JB |
1634 | struct ieee80211_sub_if_data *sdata = |
1635 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1636 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1637 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1638 | |
46900298 JB |
1639 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1640 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1641 | } |
1642 | ||
46900298 | 1643 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1644 | { |
46900298 | 1645 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1646 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1647 | |
1648 | if (local->ops->reset_tsf) { | |
1649 | /* Reset own TSF to allow time synchronization work. */ | |
1650 | local->ops->reset_tsf(local_to_hw(local)); | |
1651 | } | |
1652 | ||
46900298 | 1653 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
1654 | |
1655 | ||
46900298 JB |
1656 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
1657 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
1658 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1659 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
1660 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1661 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
f0706e82 | 1662 | else |
46900298 JB |
1663 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
1664 | ifmgd->auth_transaction = -1; | |
1665 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1666 | ifmgd->assoc_scan_tries = 0; | |
1667 | ifmgd->direct_probe_tries = 0; | |
1668 | ifmgd->auth_tries = 0; | |
1669 | ifmgd->assoc_tries = 0; | |
24e64622 | 1670 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 1671 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
1672 | } |
1673 | ||
46900298 | 1674 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1675 | { |
46900298 | 1676 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1677 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1678 | struct ieee80211_bss *bss; |
46900298 JB |
1679 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
1680 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
1681 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
1682 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
1683 | struct ieee80211_channel *chan = local->oper_channel; | |
1684 | ||
46900298 | 1685 | if (ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
00d3f14c JB |
1686 | IEEE80211_STA_AUTO_BSSID_SEL | |
1687 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
1688 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
1689 | if (sdata->default_key) | |
1690 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 1691 | } |
9d139c81 | 1692 | |
46900298 | 1693 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
1694 | chan = NULL; |
1695 | ||
46900298 | 1696 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
1697 | bssid = NULL; |
1698 | ||
46900298 | 1699 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
1700 | ssid = NULL; |
1701 | ssid_len = 0; | |
1702 | } | |
1703 | ||
1704 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
1705 | bssid, ssid, ssid_len, | |
1706 | capa_mask, capa_val); | |
1707 | ||
1708 | if (bss) { | |
1709 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 1710 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
1711 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
1712 | bss->ssid_len); | |
1713 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
1714 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
1715 | bss->supp_rates); | |
46900298 JB |
1716 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
1717 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 1718 | else |
46900298 | 1719 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 1720 | |
9c6bd790 JB |
1721 | /* Send out direct probe if no probe resp was received or |
1722 | * the one we have is outdated | |
1723 | */ | |
00d3f14c JB |
1724 | if (!bss->last_probe_resp || |
1725 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 1726 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 1727 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 1728 | else |
46900298 | 1729 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 1730 | |
00d3f14c | 1731 | ieee80211_rx_bss_put(local, bss); |
46900298 | 1732 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
1733 | return 0; |
1734 | } else { | |
46900298 JB |
1735 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
1736 | ifmgd->assoc_scan_tries++; | |
2a519311 JB |
1737 | /* XXX maybe racy? */ |
1738 | if (local->scan_req) | |
1739 | return -1; | |
1740 | memcpy(local->int_scan_req.ssids[0].ssid, | |
46900298 JB |
1741 | ifmgd->ssid, IEEE80211_MAX_SSID_LEN); |
1742 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) | |
2a519311 | 1743 | local->int_scan_req.ssids[0].ssid_len = 0; |
9c6bd790 | 1744 | else |
46900298 | 1745 | local->int_scan_req.ssids[0].ssid_len = ifmgd->ssid_len; |
af88b907 HS |
1746 | |
1747 | if (ieee80211_start_scan(sdata, &local->int_scan_req)) | |
1748 | ieee80211_scan_failed(local); | |
1749 | ||
46900298 JB |
1750 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
1751 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 1752 | } else { |
46900298 JB |
1753 | ifmgd->assoc_scan_tries = 0; |
1754 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
e374055a | 1755 | } |
9c6bd790 JB |
1756 | } |
1757 | return -1; | |
1758 | } | |
1759 | ||
1760 | ||
1761 | static void ieee80211_sta_work(struct work_struct *work) | |
1762 | { | |
1763 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 1764 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 1765 | struct ieee80211_local *local = sdata->local; |
46900298 | 1766 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
1767 | struct sk_buff *skb; |
1768 | ||
1769 | if (!netif_running(sdata->dev)) | |
1770 | return; | |
1771 | ||
c2b13452 | 1772 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
1773 | return; |
1774 | ||
46900298 | 1775 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1776 | return; |
46900298 | 1777 | ifmgd = &sdata->u.mgd; |
f0706e82 | 1778 | |
46900298 | 1779 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
1780 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
1781 | ||
46900298 JB |
1782 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
1783 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
1784 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
1785 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
af88b907 HS |
1786 | /* |
1787 | * The call to ieee80211_start_scan can fail but ieee80211_request_scan | |
1788 | * (which queued ieee80211_sta_work) did not return an error. Thus, call | |
1789 | * ieee80211_scan_failed here if ieee80211_start_scan fails in order to | |
1790 | * notify the scan requester. | |
1791 | */ | |
1792 | if (ieee80211_start_scan(sdata, local->scan_req)) | |
1793 | ieee80211_scan_failed(local); | |
9c6bd790 | 1794 | return; |
f0706e82 JB |
1795 | } |
1796 | ||
46900298 JB |
1797 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
1798 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 1799 | return; |
46900298 JB |
1800 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1801 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 1802 | return; |
d6f2da5b | 1803 | |
46900298 | 1804 | switch (ifmgd->state) { |
9c6bd790 JB |
1805 | case IEEE80211_STA_MLME_DISABLED: |
1806 | break; | |
1807 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 1808 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
1809 | break; |
1810 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 1811 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
1812 | break; |
1813 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 1814 | ieee80211_associate(sdata); |
9c6bd790 JB |
1815 | break; |
1816 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 1817 | ieee80211_associated(sdata); |
9c6bd790 JB |
1818 | break; |
1819 | default: | |
1820 | WARN_ON(1); | |
1821 | break; | |
1822 | } | |
1823 | ||
46900298 | 1824 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
1825 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
1826 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
1827 | ||
46900298 | 1828 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
1829 | WLAN_REASON_UNSPECIFIED); |
1830 | } | |
f0706e82 JB |
1831 | } |
1832 | ||
9c6bd790 JB |
1833 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
1834 | { | |
05c914fe | 1835 | if (sdata->vif.type == NL80211_IFTYPE_STATION) |
9c6bd790 | 1836 | queue_work(sdata->local->hw.workqueue, |
46900298 | 1837 | &sdata->u.mgd.work); |
9c6bd790 | 1838 | } |
f0706e82 | 1839 | |
9c6bd790 JB |
1840 | /* interface setup */ |
1841 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 1842 | { |
46900298 | 1843 | struct ieee80211_if_managed *ifmgd; |
988c0f72 | 1844 | |
46900298 JB |
1845 | ifmgd = &sdata->u.mgd; |
1846 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
1847 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
1848 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, | |
c481ec97 | 1849 | (unsigned long) sdata); |
46900298 | 1850 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 1851 | (unsigned long) sdata); |
46900298 | 1852 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 1853 | |
46900298 JB |
1854 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
1855 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 1856 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 1857 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
1858 | IEEE80211_STA_AUTO_BSSID_SEL | |
1859 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 1860 | if (sdata->local->hw.queues >= 4) |
46900298 | 1861 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
f0706e82 JB |
1862 | } |
1863 | ||
9c6bd790 | 1864 | /* configuration hooks */ |
46900298 | 1865 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 1866 | { |
46900298 | 1867 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1868 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 1869 | |
46900298 | 1870 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 1871 | return; |
60f8b39c | 1872 | |
46900298 | 1873 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 1874 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 1875 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 1876 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 1877 | |
46900298 JB |
1878 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
1879 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 1880 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 1881 | |
46900298 JB |
1882 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); |
1883 | queue_work(local->hw.workqueue, &ifmgd->work); | |
9c6bd790 JB |
1884 | } |
1885 | } | |
60f8b39c | 1886 | |
79f6440c AF |
1887 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
1888 | { | |
1889 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1890 | ||
79f6440c AF |
1891 | if (ifmgd->ssid_len) |
1892 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
1893 | else | |
1894 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
1895 | ||
1896 | return 0; | |
1897 | } | |
1898 | ||
9c6bd790 JB |
1899 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
1900 | { | |
46900298 | 1901 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 1902 | |
9c6bd790 JB |
1903 | if (len > IEEE80211_MAX_SSID_LEN) |
1904 | return -EINVAL; | |
1905 | ||
46900298 | 1906 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 1907 | |
46900298 | 1908 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
1909 | /* |
1910 | * Do not use reassociation if SSID is changed (different ESS). | |
1911 | */ | |
1912 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
1913 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
1914 | memcpy(ifmgd->ssid, ssid, len); | |
1915 | ifmgd->ssid_len = len; | |
60f8b39c | 1916 | } |
60f8b39c | 1917 | |
79f6440c | 1918 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
1919 | } |
1920 | ||
1921 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
1922 | { | |
46900298 JB |
1923 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1924 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
1925 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
1926 | return 0; |
1927 | } | |
1928 | ||
1929 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
1930 | { | |
46900298 | 1931 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 1932 | |
dfe67012 | 1933 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
1934 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
1935 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 1936 | } else { |
46900298 JB |
1937 | memset(ifmgd->bssid, 0, ETH_ALEN); |
1938 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
1939 | } |
1940 | ||
1941 | if (netif_running(sdata->dev)) { | |
1942 | if (ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID)) { | |
9c6bd790 JB |
1943 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " |
1944 | "the low-level driver\n", sdata->dev->name); | |
9c6bd790 JB |
1945 | } |
1946 | } | |
60f8b39c | 1947 | |
79f6440c | 1948 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
1949 | } |
1950 | ||
1951 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) | |
1952 | { | |
46900298 | 1953 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 1954 | |
46900298 | 1955 | kfree(ifmgd->extra_ie); |
9c6bd790 | 1956 | if (len == 0) { |
46900298 JB |
1957 | ifmgd->extra_ie = NULL; |
1958 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 1959 | return 0; |
60f8b39c | 1960 | } |
46900298 JB |
1961 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
1962 | if (!ifmgd->extra_ie) { | |
1963 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
1964 | return -ENOMEM; |
1965 | } | |
46900298 JB |
1966 | memcpy(ifmgd->extra_ie, ie, len); |
1967 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 1968 | return 0; |
60f8b39c JB |
1969 | } |
1970 | ||
f698d856 | 1971 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 1972 | { |
f4ea83dd | 1973 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 1974 | sdata->dev->name, reason); |
f0706e82 | 1975 | |
46900298 | 1976 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1977 | return -EINVAL; |
1978 | ||
46900298 | 1979 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
1980 | return 0; |
1981 | } | |
1982 | ||
f698d856 | 1983 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 1984 | { |
46900298 | 1985 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 1986 | |
f4ea83dd | 1987 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 1988 | sdata->dev->name, reason); |
f0706e82 | 1989 | |
05c914fe | 1990 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
f0706e82 JB |
1991 | return -EINVAL; |
1992 | ||
46900298 JB |
1993 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
1994 | return -ENOLINK; | |
f0706e82 | 1995 | |
46900298 | 1996 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
1997 | return 0; |
1998 | } | |
84363e6e | 1999 | |
9c6bd790 JB |
2000 | /* scan finished notification */ |
2001 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2002 | { | |
2003 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2004 | |
2005 | /* Restart STA timers */ | |
2006 | rcu_read_lock(); | |
2007 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2008 | ieee80211_restart_sta_timer(sdata); | |
2009 | rcu_read_unlock(); | |
2010 | } | |
520eb820 KV |
2011 | |
2012 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
2013 | { | |
2014 | struct ieee80211_local *local = | |
2015 | container_of(work, struct ieee80211_local, | |
2016 | dynamic_ps_disable_work); | |
2017 | ||
2018 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
2019 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
2020 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
2021 | } | |
2022 | ||
2023 | ieee80211_wake_queues_by_reason(&local->hw, | |
2024 | IEEE80211_QUEUE_STOP_REASON_PS); | |
2025 | } | |
2026 | ||
2027 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
2028 | { | |
2029 | struct ieee80211_local *local = | |
2030 | container_of(work, struct ieee80211_local, | |
2031 | dynamic_ps_enable_work); | |
a97b77b9 | 2032 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; |
520eb820 KV |
2033 | |
2034 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
2035 | return; | |
2036 | ||
4be8c387 JB |
2037 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) |
2038 | ieee80211_send_nullfunc(local, sdata, 1); | |
520eb820 | 2039 | |
4be8c387 | 2040 | local->hw.conf.flags |= IEEE80211_CONF_PS; |
520eb820 KV |
2041 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); |
2042 | } | |
2043 | ||
2044 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
2045 | { | |
2046 | struct ieee80211_local *local = (void *) data; | |
2047 | ||
2048 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
2049 | } | |
46900298 JB |
2050 | |
2051 | void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2052 | struct ieee80211_sub_if_data *sdata, | |
2053 | int powersave) | |
2054 | { | |
2055 | struct sk_buff *skb; | |
2056 | struct ieee80211_hdr *nullfunc; | |
2057 | __le16 fc; | |
2058 | ||
2059 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
2060 | return; | |
2061 | ||
2062 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2063 | if (!skb) { | |
2064 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2065 | "frame\n", sdata->dev->name); | |
2066 | return; | |
2067 | } | |
2068 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2069 | ||
2070 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2071 | memset(nullfunc, 0, 24); | |
2072 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2073 | IEEE80211_FCTL_TODS); | |
2074 | if (powersave) | |
2075 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
2076 | nullfunc->frame_control = fc; | |
2077 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2078 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2079 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2080 | ||
2081 | ieee80211_tx_skb(sdata, skb, 0); | |
2082 | } |