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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
e0502de6 | 36 | #define IEEE80211_PROBE_WAIT (HZ / 20) |
15b7b062 | 37 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 38 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 39 | |
5484e237 JB |
40 | /* utils */ |
41 | static int ecw2cw(int ecw) | |
60f8b39c | 42 | { |
5484e237 | 43 | return (1 << ecw) - 1; |
60f8b39c JB |
44 | } |
45 | ||
c2b13452 | 46 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
47 | { |
48 | u8 *end, *pos; | |
49 | ||
00d3f14c | 50 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
51 | if (pos == NULL) |
52 | return NULL; | |
00d3f14c | 53 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
54 | |
55 | while (pos + 1 < end) { | |
56 | if (pos + 2 + pos[1] > end) | |
57 | break; | |
58 | if (pos[0] == ie) | |
59 | return pos; | |
60 | pos += 2 + pos[1]; | |
61 | } | |
62 | ||
63 | return NULL; | |
64 | } | |
65 | ||
c2b13452 | 66 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 67 | struct ieee80211_supported_band *sband, |
881d948c | 68 | u32 *rates) |
9ac19a90 JB |
69 | { |
70 | int i, j, count; | |
71 | *rates = 0; | |
72 | count = 0; | |
73 | for (i = 0; i < bss->supp_rates_len; i++) { | |
74 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
75 | ||
76 | for (j = 0; j < sband->n_bitrates; j++) | |
77 | if (sband->bitrates[j].bitrate == rate) { | |
78 | *rates |= BIT(j); | |
79 | count++; | |
80 | break; | |
81 | } | |
82 | } | |
83 | ||
84 | return count; | |
85 | } | |
86 | ||
d5522e03 JB |
87 | /* |
88 | * ieee80211_enable_ht should be called only after the operating band | |
89 | * has been determined as ht configuration depends on the hw's | |
90 | * HT abilities for a specific band. | |
91 | */ | |
92 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
93 | struct ieee80211_ht_info *hti, | |
94 | u16 ap_ht_cap_flags) | |
95 | { | |
96 | struct ieee80211_local *local = sdata->local; | |
97 | struct ieee80211_supported_band *sband; | |
98 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
d5522e03 JB |
99 | struct sta_info *sta; |
100 | u32 changed = 0; | |
9ed6bcce | 101 | u16 ht_opmode; |
d5522e03 JB |
102 | bool enable_ht = true, ht_changed; |
103 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
104 | ||
105 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
106 | ||
d5522e03 JB |
107 | /* HT is not supported */ |
108 | if (!sband->ht_cap.ht_supported) | |
109 | enable_ht = false; | |
110 | ||
111 | /* check that channel matches the right operating channel */ | |
112 | if (local->hw.conf.channel->center_freq != | |
113 | ieee80211_channel_to_frequency(hti->control_chan)) | |
114 | enable_ht = false; | |
115 | ||
116 | if (enable_ht) { | |
117 | channel_type = NL80211_CHAN_HT20; | |
118 | ||
119 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
120 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
121 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
122 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
123 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
124 | if (!(local->hw.conf.channel->flags & |
125 | IEEE80211_CHAN_NO_HT40PLUS)) | |
126 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
127 | break; |
128 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
129 | if (!(local->hw.conf.channel->flags & |
130 | IEEE80211_CHAN_NO_HT40MINUS)) | |
131 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
132 | break; |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
138 | channel_type != local->hw.conf.channel_type; | |
139 | ||
140 | local->oper_channel_type = channel_type; | |
141 | ||
142 | if (ht_changed) { | |
143 | /* channel_type change automatically detected */ | |
144 | ieee80211_hw_config(local, 0); | |
145 | ||
146 | rcu_read_lock(); | |
147 | ||
148 | sta = sta_info_get(local, ifmgd->bssid); | |
149 | if (sta) | |
150 | rate_control_rate_update(local, sband, sta, | |
151 | IEEE80211_RC_HT_CHANGED); | |
152 | ||
153 | rcu_read_unlock(); | |
d5522e03 JB |
154 | } |
155 | ||
156 | /* disable HT */ | |
157 | if (!enable_ht) | |
158 | return 0; | |
159 | ||
9ed6bcce | 160 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
161 | |
162 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
163 | if (!sdata->ht_opmode_valid || |
164 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 165 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 166 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 167 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
168 | } |
169 | ||
170 | return changed; | |
171 | } | |
172 | ||
9c6bd790 JB |
173 | /* frame sending functions */ |
174 | ||
46900298 | 175 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 176 | { |
46900298 | 177 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
178 | struct ieee80211_local *local = sdata->local; |
179 | struct sk_buff *skb; | |
180 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 181 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
182 | int i, len, count, rates_len, supp_rates_len; |
183 | u16 capab; | |
c2b13452 | 184 | struct ieee80211_bss *bss; |
9ac19a90 JB |
185 | int wmm = 0; |
186 | struct ieee80211_supported_band *sband; | |
881d948c | 187 | u32 rates = 0; |
9ac19a90 JB |
188 | |
189 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 190 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 191 | ifmgd->ssid_len); |
9ac19a90 JB |
192 | if (!skb) { |
193 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
194 | "frame\n", sdata->dev->name); | |
195 | return; | |
196 | } | |
197 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
198 | ||
199 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
200 | ||
46900298 | 201 | capab = ifmgd->capab; |
9ac19a90 JB |
202 | |
203 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
204 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
205 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
206 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
207 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
208 | } | |
209 | ||
46900298 | 210 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 211 | local->hw.conf.channel->center_freq, |
46900298 | 212 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 213 | if (bss) { |
00d3f14c | 214 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
215 | capab |= WLAN_CAPABILITY_PRIVACY; |
216 | if (bss->wmm_used) | |
217 | wmm = 1; | |
218 | ||
219 | /* get all rates supported by the device and the AP as | |
220 | * some APs don't like getting a superset of their rates | |
221 | * in the association request (e.g. D-Link DAP 1353 in | |
222 | * b-only mode) */ | |
223 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
224 | ||
00d3f14c | 225 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
226 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
227 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
228 | ||
229 | ieee80211_rx_bss_put(local, bss); | |
230 | } else { | |
231 | rates = ~0; | |
232 | rates_len = sband->n_bitrates; | |
233 | } | |
234 | ||
235 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
236 | memset(mgmt, 0, 24); | |
46900298 | 237 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 238 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 239 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 240 | |
46900298 | 241 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
242 | skb_put(skb, 10); |
243 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
244 | IEEE80211_STYPE_REASSOC_REQ); | |
245 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
246 | mgmt->u.reassoc_req.listen_interval = | |
247 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 248 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
249 | ETH_ALEN); |
250 | } else { | |
251 | skb_put(skb, 4); | |
252 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
253 | IEEE80211_STYPE_ASSOC_REQ); | |
254 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 255 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
256 | cpu_to_le16(local->hw.conf.listen_interval); |
257 | } | |
258 | ||
259 | /* SSID */ | |
46900298 | 260 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 261 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
262 | *pos++ = ifmgd->ssid_len; |
263 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
264 | |
265 | /* add all rates which were marked to be used above */ | |
266 | supp_rates_len = rates_len; | |
267 | if (supp_rates_len > 8) | |
268 | supp_rates_len = 8; | |
269 | ||
270 | len = sband->n_bitrates; | |
271 | pos = skb_put(skb, supp_rates_len + 2); | |
272 | *pos++ = WLAN_EID_SUPP_RATES; | |
273 | *pos++ = supp_rates_len; | |
274 | ||
275 | count = 0; | |
276 | for (i = 0; i < sband->n_bitrates; i++) { | |
277 | if (BIT(i) & rates) { | |
278 | int rate = sband->bitrates[i].bitrate; | |
279 | *pos++ = (u8) (rate / 5); | |
280 | if (++count == 8) | |
281 | break; | |
282 | } | |
283 | } | |
284 | ||
285 | if (rates_len > count) { | |
286 | pos = skb_put(skb, rates_len - count + 2); | |
287 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
288 | *pos++ = rates_len - count; | |
289 | ||
290 | for (i++; i < sband->n_bitrates; i++) { | |
291 | if (BIT(i) & rates) { | |
292 | int rate = sband->bitrates[i].bitrate; | |
293 | *pos++ = (u8) (rate / 5); | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
299 | /* 1. power capabilities */ | |
300 | pos = skb_put(skb, 4); | |
301 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
302 | *pos++ = 2; | |
303 | *pos++ = 0; /* min tx power */ | |
304 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
305 | ||
306 | /* 2. supported channels */ | |
307 | /* TODO: get this in reg domain format */ | |
308 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
309 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
310 | *pos++ = 2 * sband->n_channels; | |
311 | for (i = 0; i < sband->n_channels; i++) { | |
312 | *pos++ = ieee80211_frequency_to_channel( | |
313 | sband->channels[i].center_freq); | |
314 | *pos++ = 1; /* one channel in the subband*/ | |
315 | } | |
316 | } | |
317 | ||
46900298 JB |
318 | if (ifmgd->extra_ie) { |
319 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
320 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
321 | } |
322 | ||
46900298 | 323 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
324 | pos = skb_put(skb, 9); |
325 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
326 | *pos++ = 7; /* len */ | |
327 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
328 | *pos++ = 0x50; | |
329 | *pos++ = 0xf2; | |
330 | *pos++ = 2; /* WME */ | |
331 | *pos++ = 0; /* WME info */ | |
332 | *pos++ = 1; /* WME ver */ | |
333 | *pos++ = 0; | |
334 | } | |
335 | ||
336 | /* wmm support is a must to HT */ | |
eb46936b VT |
337 | /* |
338 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
339 | * ciphers in HT mode. We still associate in non-ht | |
340 | * mode (11a/b/g) if any one of these ciphers is | |
341 | * configured as pairwise. | |
342 | */ | |
46900298 | 343 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
344 | sband->ht_cap.ht_supported && |
345 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 346 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 347 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
348 | struct ieee80211_ht_info *ht_info = |
349 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
350 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
351 | __le16 tmp; |
352 | u32 flags = local->hw.conf.channel->flags; | |
353 | ||
d9fe60de JB |
354 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
355 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
689da1b3 | 356 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
d9fe60de | 357 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
358 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
359 | } | |
360 | break; | |
d9fe60de | 361 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
689da1b3 | 362 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
d9fe60de | 363 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
364 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
365 | } | |
366 | break; | |
367 | } | |
368 | ||
369 | tmp = cpu_to_le16(cap); | |
370 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
371 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
372 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
373 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
374 | memcpy(pos, &tmp, sizeof(u16)); | |
375 | pos += sizeof(u16); | |
376 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
377 | *pos++ = sband->ht_cap.ampdu_factor | |
378 | (sband->ht_cap.ampdu_density << 2); | |
379 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
380 | } |
381 | ||
46900298 JB |
382 | kfree(ifmgd->assocreq_ies); |
383 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
384 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
385 | if (ifmgd->assocreq_ies) | |
386 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 387 | |
e50db65c | 388 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
389 | } |
390 | ||
391 | ||
ef422bc0 JB |
392 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
393 | u16 stype, u16 reason) | |
9ac19a90 JB |
394 | { |
395 | struct ieee80211_local *local = sdata->local; | |
46900298 | 396 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
397 | struct sk_buff *skb; |
398 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 399 | |
65fc73ac | 400 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 401 | if (!skb) { |
ef422bc0 JB |
402 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
403 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
404 | return; |
405 | } | |
406 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
407 | ||
408 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
409 | memset(mgmt, 0, 24); | |
46900298 | 410 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 411 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 412 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 413 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 414 | skb_put(skb, 2); |
ef422bc0 | 415 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
416 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
417 | ||
53b46b84 JM |
418 | if (stype == IEEE80211_STYPE_DEAUTH) |
419 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
420 | else | |
421 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 422 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
423 | } |
424 | ||
572e0012 KV |
425 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
426 | struct ieee80211_sub_if_data *sdata) | |
427 | { | |
46900298 | 428 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
429 | struct ieee80211_pspoll *pspoll; |
430 | struct sk_buff *skb; | |
431 | u16 fc; | |
432 | ||
433 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
434 | if (!skb) { | |
435 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
436 | "pspoll frame\n", sdata->dev->name); | |
437 | return; | |
438 | } | |
439 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
440 | ||
441 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
442 | memset(pspoll, 0, sizeof(*pspoll)); | |
443 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
444 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 445 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
446 | |
447 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
448 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
449 | ||
46900298 | 450 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
451 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
452 | ||
453 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
454 | } |
455 | ||
965bedad JB |
456 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
457 | struct ieee80211_sub_if_data *sdata, | |
458 | int powersave) | |
459 | { | |
460 | struct sk_buff *skb; | |
461 | struct ieee80211_hdr *nullfunc; | |
462 | __le16 fc; | |
463 | ||
464 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
465 | return; | |
466 | ||
467 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
468 | if (!skb) { | |
469 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
470 | "frame\n", sdata->dev->name); | |
471 | return; | |
472 | } | |
473 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
474 | ||
475 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
476 | memset(nullfunc, 0, 24); | |
477 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
478 | IEEE80211_FCTL_TODS); | |
479 | if (powersave) | |
480 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
481 | nullfunc->frame_control = fc; | |
482 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
483 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
484 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
485 | ||
486 | ieee80211_tx_skb(sdata, skb, 0); | |
487 | } | |
488 | ||
cc32abd4 JB |
489 | /* spectrum management related things */ |
490 | static void ieee80211_chswitch_work(struct work_struct *work) | |
491 | { | |
492 | struct ieee80211_sub_if_data *sdata = | |
493 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
494 | struct ieee80211_bss *bss; | |
495 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
496 | ||
497 | if (!netif_running(sdata->dev)) | |
498 | return; | |
499 | ||
500 | bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid, | |
501 | sdata->local->hw.conf.channel->center_freq, | |
502 | ifmgd->ssid, ifmgd->ssid_len); | |
503 | if (!bss) | |
504 | goto exit; | |
505 | ||
506 | sdata->local->oper_channel = sdata->local->csa_channel; | |
507 | /* XXX: shouldn't really modify cfg80211-owned data! */ | |
508 | if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL)) | |
509 | bss->cbss.channel = sdata->local->oper_channel; | |
510 | ||
511 | ieee80211_rx_bss_put(sdata->local, bss); | |
512 | exit: | |
513 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
514 | ieee80211_wake_queues_by_reason(&sdata->local->hw, | |
515 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
516 | } | |
517 | ||
518 | static void ieee80211_chswitch_timer(unsigned long data) | |
519 | { | |
520 | struct ieee80211_sub_if_data *sdata = | |
521 | (struct ieee80211_sub_if_data *) data; | |
522 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
523 | ||
524 | queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work); | |
525 | } | |
526 | ||
527 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
528 | struct ieee80211_channel_sw_ie *sw_elem, | |
529 | struct ieee80211_bss *bss) | |
530 | { | |
531 | struct ieee80211_channel *new_ch; | |
532 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
533 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); | |
534 | ||
535 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED) | |
536 | return; | |
537 | ||
538 | if (sdata->local->sw_scanning || sdata->local->hw_scanning) | |
539 | return; | |
540 | ||
541 | /* Disregard subsequent beacons if we are already running a timer | |
542 | processing a CSA */ | |
543 | ||
544 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
545 | return; | |
546 | ||
547 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
548 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
549 | return; | |
550 | ||
551 | sdata->local->csa_channel = new_ch; | |
552 | ||
553 | if (sw_elem->count <= 1) { | |
554 | queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work); | |
555 | } else { | |
556 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
557 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
558 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
559 | mod_timer(&ifmgd->chswitch_timer, | |
560 | jiffies + | |
561 | msecs_to_jiffies(sw_elem->count * | |
562 | bss->cbss.beacon_interval)); | |
563 | } | |
564 | } | |
565 | ||
566 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
567 | u16 capab_info, u8 *pwr_constr_elem, | |
568 | u8 pwr_constr_elem_len) | |
569 | { | |
570 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
571 | ||
572 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
573 | return; | |
574 | ||
575 | /* Power constraint IE length should be 1 octet */ | |
576 | if (pwr_constr_elem_len != 1) | |
577 | return; | |
578 | ||
579 | if ((*pwr_constr_elem <= conf->channel->max_power) && | |
580 | (*pwr_constr_elem != sdata->local->power_constr_level)) { | |
581 | sdata->local->power_constr_level = *pwr_constr_elem; | |
582 | ieee80211_hw_config(sdata->local, 0); | |
583 | } | |
584 | } | |
585 | ||
965bedad JB |
586 | /* powersave */ |
587 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
588 | struct ieee80211_sub_if_data *sdata) | |
589 | { | |
590 | struct ieee80211_conf *conf = &local->hw.conf; | |
591 | ||
d5edaedc JB |
592 | /* |
593 | * If we are scanning right now then the parameters will | |
594 | * take effect when scan finishes. | |
595 | */ | |
596 | if (local->hw_scanning || local->sw_scanning) | |
597 | return; | |
598 | ||
965bedad JB |
599 | if (conf->dynamic_ps_timeout > 0 && |
600 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
601 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
602 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
603 | } else { | |
604 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
605 | ieee80211_send_nullfunc(local, sdata, 1); | |
606 | conf->flags |= IEEE80211_CONF_PS; | |
607 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
608 | } | |
609 | } | |
610 | ||
611 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
612 | { | |
613 | struct ieee80211_conf *conf = &local->hw.conf; | |
614 | ||
615 | if (local->ps_sdata) { | |
616 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
617 | return; | |
618 | ||
619 | ieee80211_enable_ps(local, local->ps_sdata); | |
620 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
621 | conf->flags &= ~IEEE80211_CONF_PS; | |
622 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
623 | del_timer_sync(&local->dynamic_ps_timer); | |
624 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
625 | } | |
626 | } | |
627 | ||
628 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 629 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
630 | { |
631 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
632 | int count = 0; | |
633 | ||
634 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
635 | local->ps_sdata = NULL; | |
636 | return; | |
637 | } | |
638 | ||
639 | list_for_each_entry(sdata, &local->interfaces, list) { | |
640 | if (!netif_running(sdata->dev)) | |
641 | continue; | |
642 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
643 | continue; | |
644 | found = sdata; | |
645 | count++; | |
646 | } | |
647 | ||
10f644a4 JB |
648 | if (count == 1 && found->u.mgd.powersave) { |
649 | s32 beaconint_us; | |
650 | ||
651 | if (latency < 0) | |
652 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
653 | ||
654 | beaconint_us = ieee80211_tu_to_usec( | |
655 | found->vif.bss_conf.beacon_int); | |
656 | ||
04fe2037 | 657 | if (beaconint_us > latency) { |
10f644a4 | 658 | local->ps_sdata = NULL; |
04fe2037 JB |
659 | } else { |
660 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
661 | int maxslp = 1; | |
662 | ||
663 | if (dtimper > 1) | |
664 | maxslp = min_t(int, dtimper, | |
665 | latency / beaconint_us); | |
666 | ||
9ccebe61 | 667 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 668 | local->ps_sdata = found; |
04fe2037 | 669 | } |
10f644a4 | 670 | } else { |
965bedad | 671 | local->ps_sdata = NULL; |
10f644a4 | 672 | } |
965bedad JB |
673 | |
674 | ieee80211_change_ps(local); | |
675 | } | |
676 | ||
677 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
678 | { | |
679 | struct ieee80211_local *local = | |
680 | container_of(work, struct ieee80211_local, | |
681 | dynamic_ps_disable_work); | |
682 | ||
683 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
684 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
685 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
686 | } | |
687 | ||
688 | ieee80211_wake_queues_by_reason(&local->hw, | |
689 | IEEE80211_QUEUE_STOP_REASON_PS); | |
690 | } | |
691 | ||
692 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
693 | { | |
694 | struct ieee80211_local *local = | |
695 | container_of(work, struct ieee80211_local, | |
696 | dynamic_ps_enable_work); | |
697 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
698 | ||
699 | /* can only happen when PS was just disabled anyway */ | |
700 | if (!sdata) | |
701 | return; | |
702 | ||
703 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
704 | return; | |
705 | ||
706 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
707 | ieee80211_send_nullfunc(local, sdata, 1); | |
708 | ||
709 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
710 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
711 | } | |
712 | ||
713 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
714 | { | |
715 | struct ieee80211_local *local = (void *) data; | |
716 | ||
717 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
718 | } | |
719 | ||
60f8b39c | 720 | /* MLME */ |
f698d856 | 721 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 722 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
723 | u8 *wmm_param, size_t wmm_param_len) |
724 | { | |
f0706e82 JB |
725 | struct ieee80211_tx_queue_params params; |
726 | size_t left; | |
727 | int count; | |
728 | u8 *pos; | |
729 | ||
46900298 | 730 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
731 | return; |
732 | ||
733 | if (!wmm_param) | |
734 | return; | |
735 | ||
f0706e82 JB |
736 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
737 | return; | |
738 | count = wmm_param[6] & 0x0f; | |
46900298 | 739 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 740 | return; |
46900298 | 741 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
742 | |
743 | pos = wmm_param + 8; | |
744 | left = wmm_param_len - 8; | |
745 | ||
746 | memset(¶ms, 0, sizeof(params)); | |
747 | ||
f0706e82 JB |
748 | local->wmm_acm = 0; |
749 | for (; left >= 4; left -= 4, pos += 4) { | |
750 | int aci = (pos[0] >> 5) & 0x03; | |
751 | int acm = (pos[0] >> 4) & 0x01; | |
752 | int queue; | |
753 | ||
754 | switch (aci) { | |
0eeb59fe | 755 | case 1: /* AC_BK */ |
e100bb64 | 756 | queue = 3; |
988c0f72 | 757 | if (acm) |
0eeb59fe | 758 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 759 | break; |
0eeb59fe | 760 | case 2: /* AC_VI */ |
e100bb64 | 761 | queue = 1; |
988c0f72 | 762 | if (acm) |
0eeb59fe | 763 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 764 | break; |
0eeb59fe | 765 | case 3: /* AC_VO */ |
e100bb64 | 766 | queue = 0; |
988c0f72 | 767 | if (acm) |
0eeb59fe | 768 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 769 | break; |
0eeb59fe | 770 | case 0: /* AC_BE */ |
f0706e82 | 771 | default: |
e100bb64 | 772 | queue = 2; |
988c0f72 | 773 | if (acm) |
0eeb59fe | 774 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
775 | break; |
776 | } | |
777 | ||
778 | params.aifs = pos[0] & 0x0f; | |
779 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
780 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 781 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 782 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 783 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 784 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 785 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
786 | params.cw_max, params.txop); |
787 | #endif | |
24487981 | 788 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 789 | printk(KERN_DEBUG "%s: failed to set TX queue " |
24487981 JB |
790 | "parameters for queue %d\n", local->mdev->name, |
791 | queue); | |
f0706e82 JB |
792 | } |
793 | } | |
794 | ||
7a5158ef JB |
795 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
796 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 797 | { |
bda3933a | 798 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 799 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 800 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 801 | #endif |
471b3efd | 802 | u32 changed = 0; |
7a5158ef JB |
803 | bool use_protection; |
804 | bool use_short_preamble; | |
805 | bool use_short_slot; | |
806 | ||
807 | if (erp_valid) { | |
808 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
809 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
810 | } else { | |
811 | use_protection = false; | |
812 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
813 | } | |
814 | ||
815 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 816 | |
471b3efd | 817 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 818 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 819 | if (net_ratelimit()) { |
0c68ae26 | 820 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 821 | sdata->dev->name, |
5628221c | 822 | use_protection ? "enabled" : "disabled", |
46900298 | 823 | ifmgd->bssid); |
5628221c | 824 | } |
f4ea83dd | 825 | #endif |
471b3efd JB |
826 | bss_conf->use_cts_prot = use_protection; |
827 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 828 | } |
7e9ed188 | 829 | |
d43c7b37 | 830 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 831 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
832 | if (net_ratelimit()) { |
833 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 834 | " (BSSID=%pM)\n", |
471b3efd | 835 | sdata->dev->name, |
d43c7b37 | 836 | use_short_preamble ? "short" : "long", |
46900298 | 837 | ifmgd->bssid); |
7e9ed188 | 838 | } |
f4ea83dd | 839 | #endif |
d43c7b37 | 840 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 841 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 842 | } |
d9430a32 | 843 | |
7a5158ef JB |
844 | if (use_short_slot != bss_conf->use_short_slot) { |
845 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
846 | if (net_ratelimit()) { | |
391429c1 CL |
847 | printk(KERN_DEBUG "%s: switched to %s slot time" |
848 | " (BSSID=%pM)\n", | |
7a5158ef JB |
849 | sdata->dev->name, |
850 | use_short_slot ? "short" : "long", | |
46900298 | 851 | ifmgd->bssid); |
7a5158ef JB |
852 | } |
853 | #endif | |
854 | bss_conf->use_short_slot = use_short_slot; | |
855 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
856 | } |
857 | ||
858 | return changed; | |
859 | } | |
860 | ||
46900298 | 861 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
862 | { |
863 | union iwreq_data wrqu; | |
46900298 | 864 | |
f5e5bf25 | 865 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
866 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
867 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
868 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
869 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
870 | } | |
871 | ||
46900298 | 872 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 873 | { |
46900298 | 874 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
875 | char *buf; |
876 | size_t len; | |
877 | int i; | |
f0706e82 JB |
878 | union iwreq_data wrqu; |
879 | ||
46900298 | 880 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
881 | return; |
882 | ||
46900298 JB |
883 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
884 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
885 | if (!buf) |
886 | return; | |
887 | ||
888 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 889 | if (ifmgd->assocreq_ies) { |
74af0250 | 890 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 891 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 892 | len += sprintf(buf + len, "%02x", |
46900298 | 893 | ifmgd->assocreq_ies[i]); |
74af0250 | 894 | } |
f0706e82 | 895 | } |
46900298 JB |
896 | if (ifmgd->assocresp_ies) { |
897 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
898 | len += sprintf(buf + len, " "); |
899 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 900 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 901 | len += sprintf(buf + len, "%02x", |
46900298 | 902 | ifmgd->assocresp_ies[i]); |
74af0250 | 903 | } |
f0706e82 | 904 | } |
74af0250 LT |
905 | len += sprintf(buf + len, ")"); |
906 | ||
907 | if (len > IW_CUSTOM_MAX) { | |
908 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 909 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 910 | len += sprintf(buf + len, "%02x", |
46900298 | 911 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
912 | } |
913 | } | |
914 | ||
ad788b5e JL |
915 | if (len <= IW_CUSTOM_MAX) { |
916 | memset(&wrqu, 0, sizeof(wrqu)); | |
917 | wrqu.data.length = len; | |
918 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
919 | } | |
74af0250 LT |
920 | |
921 | kfree(buf); | |
f0706e82 JB |
922 | } |
923 | ||
924 | ||
f698d856 | 925 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 926 | u32 bss_info_changed) |
f0706e82 | 927 | { |
46900298 | 928 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 929 | struct ieee80211_local *local = sdata->local; |
38668c05 | 930 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 931 | |
c2b13452 | 932 | struct ieee80211_bss *bss; |
d6f2da5b | 933 | |
ae5eb026 | 934 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 935 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 936 | |
46900298 | 937 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 938 | conf->channel->center_freq, |
46900298 | 939 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
940 | if (bss) { |
941 | /* set timing information */ | |
00d3f14c JB |
942 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
943 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 944 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 945 | |
57c4d7b4 | 946 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 947 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 948 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 949 | |
04de8381 KV |
950 | cfg80211_hold_bss(&bss->cbss); |
951 | ||
9ac19a90 | 952 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
953 | } |
954 | ||
46900298 JB |
955 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
956 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
957 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 958 | |
46900298 | 959 | ifmgd->last_probe = jiffies; |
9ac19a90 | 960 | ieee80211_led_assoc(local, 1); |
9306102e | 961 | |
bda3933a | 962 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
963 | /* |
964 | * For now just always ask the driver to update the basic rateset | |
965 | * when we have associated, we aren't checking whether it actually | |
966 | * changed or not. | |
967 | */ | |
ae5eb026 JB |
968 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
969 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 970 | |
965bedad | 971 | /* will be same as sdata */ |
04fe2037 JB |
972 | if (local->ps_sdata) { |
973 | mutex_lock(&local->iflist_mtx); | |
974 | ieee80211_recalc_ps(local, -1); | |
975 | mutex_unlock(&local->iflist_mtx); | |
976 | } | |
e0cb686f | 977 | |
9ac19a90 JB |
978 | netif_tx_start_all_queues(sdata->dev); |
979 | netif_carrier_on(sdata->dev); | |
f0706e82 | 980 | |
46900298 | 981 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
982 | } |
983 | ||
46900298 | 984 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 985 | { |
46900298 | 986 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 987 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
988 | |
989 | ifmgd->direct_probe_tries++; | |
990 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 991 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
992 | sdata->dev->name, ifmgd->bssid); |
993 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 994 | ieee80211_recalc_idle(local); |
e61f2340 | 995 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
7a947080 VT |
996 | |
997 | /* | |
998 | * Most likely AP is not in the range so remove the | |
999 | * bss information associated to the AP | |
1000 | */ | |
46900298 | 1001 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1002 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1003 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1004 | |
1005 | /* | |
1006 | * We might have a pending scan which had no chance to run yet | |
1007 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
1008 | * Hence, queue the STAs work again | |
1009 | */ | |
1010 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1011 | return; |
1012 | } | |
f0706e82 | 1013 | |
0c68ae26 | 1014 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
1015 | sdata->dev->name, ifmgd->bssid, |
1016 | ifmgd->direct_probe_tries); | |
f0706e82 | 1017 | |
46900298 | 1018 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 1019 | |
9ac19a90 JB |
1020 | /* Direct probe is sent to broadcast address as some APs |
1021 | * will not answer to direct packet in unassociated state. | |
1022 | */ | |
1023 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 1024 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 1025 | |
46900298 | 1026 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 1027 | } |
f0706e82 | 1028 | |
9ac19a90 | 1029 | |
46900298 | 1030 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1031 | { |
46900298 | 1032 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1033 | struct ieee80211_local *local = sdata->local; |
636a5d36 JM |
1034 | u8 *ies; |
1035 | size_t ies_len; | |
46900298 JB |
1036 | |
1037 | ifmgd->auth_tries++; | |
1038 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 1039 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 1040 | " timed out\n", |
46900298 JB |
1041 | sdata->dev->name, ifmgd->bssid); |
1042 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1043 | ieee80211_recalc_idle(local); |
1965c853 | 1044 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1045 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1046 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1047 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1048 | |
1049 | /* | |
1050 | * We might have a pending scan which had no chance to run yet | |
1051 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
1052 | * Hence, queue the STAs work again | |
1053 | */ | |
1054 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1055 | return; |
1056 | } | |
f0706e82 | 1057 | |
46900298 | 1058 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 1059 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 1060 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 1061 | |
636a5d36 JM |
1062 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1063 | ies = ifmgd->sme_auth_ie; | |
1064 | ies_len = ifmgd->sme_auth_ie_len; | |
1065 | } else { | |
1066 | ies = NULL; | |
1067 | ies_len = 0; | |
1068 | } | |
1069 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
1070 | ifmgd->bssid, 0); |
1071 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 1072 | |
46900298 | 1073 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
1074 | } |
1075 | ||
5925d976 VN |
1076 | /* |
1077 | * The disassoc 'reason' argument can be either our own reason | |
1078 | * if self disconnected or a reason code from the AP. | |
1079 | */ | |
aa458d17 | 1080 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
1081 | bool deauth, bool self_disconnected, |
1082 | u16 reason) | |
aa458d17 | 1083 | { |
46900298 | 1084 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 1085 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
1086 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
1087 | struct ieee80211_bss *bss; | |
aa458d17 | 1088 | struct sta_info *sta; |
e0cb686f | 1089 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
1090 | |
1091 | rcu_read_lock(); | |
1092 | ||
46900298 | 1093 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
1094 | if (!sta) { |
1095 | rcu_read_unlock(); | |
1096 | return; | |
1097 | } | |
1098 | ||
1099 | if (deauth) { | |
46900298 JB |
1100 | ifmgd->direct_probe_tries = 0; |
1101 | ifmgd->auth_tries = 0; | |
aa458d17 | 1102 | } |
46900298 JB |
1103 | ifmgd->assoc_scan_tries = 0; |
1104 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1105 | |
24e64622 | 1106 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1107 | netif_carrier_off(sdata->dev); |
1108 | ||
2dace10e | 1109 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1110 | |
04de8381 KV |
1111 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1112 | conf->channel->center_freq, | |
1113 | ifmgd->ssid, ifmgd->ssid_len); | |
1114 | ||
1115 | if (bss) { | |
1116 | cfg80211_unhold_bss(&bss->cbss); | |
1117 | ieee80211_rx_bss_put(local, bss); | |
1118 | } | |
1119 | ||
aa458d17 TW |
1120 | if (self_disconnected) { |
1121 | if (deauth) | |
ef422bc0 JB |
1122 | ieee80211_send_deauth_disassoc(sdata, |
1123 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1124 | else |
ef422bc0 JB |
1125 | ieee80211_send_deauth_disassoc(sdata, |
1126 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1127 | } |
1128 | ||
46900298 | 1129 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1130 | changed |= ieee80211_reset_erp_info(sdata); |
1131 | ||
f5e5bf25 | 1132 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1133 | changed |= BSS_CHANGED_ASSOC; |
1134 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1135 | |
46900298 | 1136 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1137 | |
7a947080 | 1138 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1139 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1140 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1141 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1142 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1143 | } |
aa458d17 | 1144 | |
aa458d17 TW |
1145 | rcu_read_unlock(); |
1146 | ||
aa837e1d JB |
1147 | ieee80211_set_wmm_default(sdata); |
1148 | ||
5cff20e6 JB |
1149 | ieee80211_recalc_idle(local); |
1150 | ||
4797938c | 1151 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1152 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1153 | |
413ad50a JB |
1154 | /* on the next assoc, re-program HT parameters */ |
1155 | sdata->ht_opmode_valid = false; | |
1156 | ||
a8302de9 VT |
1157 | local->power_constr_level = 0; |
1158 | ||
520eb820 KV |
1159 | del_timer_sync(&local->dynamic_ps_timer); |
1160 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1161 | ||
e0cb686f KV |
1162 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1163 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1164 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1165 | } | |
ae5eb026 | 1166 | |
e0cb686f | 1167 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1168 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1169 | |
1170 | rcu_read_lock(); | |
1171 | ||
46900298 | 1172 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1173 | if (!sta) { |
1174 | rcu_read_unlock(); | |
1175 | return; | |
1176 | } | |
1177 | ||
1178 | sta_info_unlink(&sta); | |
1179 | ||
1180 | rcu_read_unlock(); | |
1181 | ||
1182 | sta_info_destroy(sta); | |
aa458d17 | 1183 | } |
f0706e82 | 1184 | |
9ac19a90 JB |
1185 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1186 | { | |
1187 | if (!sdata || !sdata->default_key || | |
1188 | sdata->default_key->conf.alg != ALG_WEP) | |
1189 | return 0; | |
1190 | return 1; | |
1191 | } | |
1192 | ||
46900298 | 1193 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1194 | { |
46900298 | 1195 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1196 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1197 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1198 | int bss_privacy; |
1199 | int wep_privacy; | |
1200 | int privacy_invoked; | |
f0706e82 | 1201 | |
7986cf95 | 1202 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1203 | return 0; |
1204 | ||
46900298 | 1205 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1206 | local->hw.conf.channel->center_freq, |
46900298 | 1207 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1208 | if (!bss) |
1209 | return 0; | |
1210 | ||
00d3f14c | 1211 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1212 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1213 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1214 | |
3e122be0 | 1215 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1216 | |
5b98b1f7 JB |
1217 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1218 | return 0; | |
1219 | ||
1220 | return 1; | |
f0706e82 JB |
1221 | } |
1222 | ||
46900298 | 1223 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1224 | { |
46900298 | 1225 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1226 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1227 | |
1228 | ifmgd->assoc_tries++; | |
1229 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1230 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1231 | " timed out\n", |
46900298 JB |
1232 | sdata->dev->name, ifmgd->bssid); |
1233 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1234 | ieee80211_recalc_idle(local); |
1965c853 | 1235 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1236 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1237 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1238 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1239 | /* |
1240 | * We might have a pending scan which had no chance to run yet | |
1241 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1242 | * Hence, queue the STAs work again | |
1243 | */ | |
1244 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1245 | return; |
1246 | } | |
1247 | ||
46900298 | 1248 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1249 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1250 | sdata->dev->name, ifmgd->bssid); |
1251 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1252 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1253 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1254 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
5cff20e6 | 1255 | ieee80211_recalc_idle(local); |
f0706e82 JB |
1256 | return; |
1257 | } | |
1258 | ||
46900298 | 1259 | ieee80211_send_assoc(sdata); |
f0706e82 | 1260 | |
46900298 | 1261 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1262 | } |
1263 | ||
3cf335d5 KV |
1264 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1265 | struct ieee80211_hdr *hdr) | |
1266 | { | |
1267 | /* | |
1268 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1269 | * from AP because we know that the connection is working both ways | |
1270 | * at that time. But multicast frames (and hence also beacons) must | |
1271 | * be ignored here, because we need to trigger the timer during | |
1272 | * data idle periods for sending the periodical probe request to | |
1273 | * the AP. | |
1274 | */ | |
1275 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1276 | mod_timer(&sdata->u.mgd.timer, | |
1277 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1278 | } | |
f0706e82 | 1279 | |
04de8381 KV |
1280 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1281 | { | |
1282 | struct ieee80211_sub_if_data *sdata = | |
1283 | container_of(work, struct ieee80211_sub_if_data, | |
1284 | u.mgd.beacon_loss_work); | |
1285 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1286 | ||
34bfc411 JB |
1287 | /* |
1288 | * The driver has already reported this event and we have | |
1289 | * already sent a probe request. Maybe the AP died and the | |
1290 | * driver keeps reporting until we disassociate... We have | |
1291 | * to ignore that because otherwise we would continually | |
1292 | * reset the timer and never check whether we received a | |
1293 | * probe response! | |
1294 | */ | |
1295 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1296 | return; | |
1297 | ||
a860402d MB |
1298 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1299 | if (net_ratelimit()) { | |
1300 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1301 | "- sending probe request\n", sdata->dev->name, | |
1302 | sdata->u.mgd.bssid); | |
1303 | } | |
1304 | #endif | |
04de8381 KV |
1305 | |
1306 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1307 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1308 | ifmgd->ssid_len, NULL, 0); | |
1309 | ||
e0502de6 | 1310 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
04de8381 KV |
1311 | } |
1312 | ||
1313 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1314 | { | |
1315 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1316 | ||
1317 | queue_work(sdata->local->hw.workqueue, | |
1318 | &sdata->u.mgd.beacon_loss_work); | |
1319 | } | |
1320 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1321 | ||
46900298 | 1322 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1323 | { |
46900298 | 1324 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1325 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1326 | struct sta_info *sta; |
15b7b062 | 1327 | bool disassoc = false; |
f0706e82 JB |
1328 | |
1329 | /* TODO: start monitoring current AP signal quality and number of | |
1330 | * missed beacons. Scan other channels every now and then and search | |
1331 | * for better APs. */ | |
1332 | /* TODO: remove expired BSSes */ | |
1333 | ||
46900298 | 1334 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1335 | |
d0709a65 JB |
1336 | rcu_read_lock(); |
1337 | ||
46900298 | 1338 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1339 | if (!sta) { |
0c68ae26 | 1340 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1341 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1342 | disassoc = true; |
1343 | goto unlock; | |
1344 | } | |
1345 | ||
1346 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
e0502de6 | 1347 | time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) { |
15b7b062 KV |
1348 | printk(KERN_DEBUG "%s: no probe response from AP %pM " |
1349 | "- disassociating\n", | |
1350 | sdata->dev->name, ifmgd->bssid); | |
1351 | disassoc = true; | |
1352 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1353 | goto unlock; | |
1354 | } | |
1355 | ||
04de8381 KV |
1356 | /* |
1357 | * Beacon filtering is only enabled with power save and then the | |
1358 | * stack should not check for beacon loss. | |
1359 | */ | |
1360 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1361 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1362 | time_after(jiffies, | |
15b7b062 | 1363 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1364 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1365 | if (net_ratelimit()) { | |
1366 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1367 | "- sending probe request\n", | |
1368 | sdata->dev->name, ifmgd->bssid); | |
1369 | } | |
1370 | #endif | |
15b7b062 KV |
1371 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1372 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1373 | ifmgd->ssid_len, NULL, 0); | |
1374 | goto unlock; | |
1375 | ||
1376 | } | |
1377 | ||
1378 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1379 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1380 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1381 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1382 | } |
d0709a65 | 1383 | |
15b7b062 | 1384 | unlock: |
d0709a65 JB |
1385 | rcu_read_unlock(); |
1386 | ||
7a947080 | 1387 | if (disassoc) |
46900298 | 1388 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1389 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1390 | else |
46900298 | 1391 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1392 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1393 | } |
1394 | ||
1395 | ||
46900298 | 1396 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1397 | { |
46900298 JB |
1398 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1399 | ||
f698d856 | 1400 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1401 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1402 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1403 | /* Wait for SME to request association */ | |
1404 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1405 | ieee80211_recalc_idle(sdata->local); |
636a5d36 JM |
1406 | } else |
1407 | ieee80211_associate(sdata); | |
f0706e82 JB |
1408 | } |
1409 | ||
1410 | ||
f698d856 | 1411 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1412 | struct ieee80211_mgmt *mgmt, |
1413 | size_t len) | |
1414 | { | |
1415 | u8 *pos; | |
1416 | struct ieee802_11_elems elems; | |
1417 | ||
f0706e82 | 1418 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1419 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1420 | if (!elems.challenge) |
f0706e82 | 1421 | return; |
46900298 JB |
1422 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1423 | elems.challenge - 2, elems.challenge_len + 2, | |
1424 | sdata->u.mgd.bssid, 1); | |
1425 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1426 | } |
1427 | ||
f698d856 | 1428 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1429 | struct ieee80211_mgmt *mgmt, |
1430 | size_t len) | |
1431 | { | |
46900298 | 1432 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1433 | u16 auth_alg, auth_transaction, status_code; |
1434 | ||
46900298 | 1435 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1436 | return; |
f0706e82 | 1437 | |
f4ea83dd | 1438 | if (len < 24 + 6) |
f0706e82 | 1439 | return; |
f0706e82 | 1440 | |
46900298 | 1441 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1442 | return; |
f0706e82 | 1443 | |
46900298 | 1444 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1445 | return; |
f0706e82 JB |
1446 | |
1447 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1448 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1449 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1450 | ||
46900298 JB |
1451 | if (auth_alg != ifmgd->auth_alg || |
1452 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1453 | return; |
f0706e82 JB |
1454 | |
1455 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1456 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1457 | u8 algs[3]; | |
1458 | const int num_algs = ARRAY_SIZE(algs); | |
1459 | int i, pos; | |
1460 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1461 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1462 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1463 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1464 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1465 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1466 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1467 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1468 | pos = 0; |
46900298 | 1469 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1470 | pos = 1; |
1471 | else | |
1472 | pos = 2; | |
1473 | for (i = 0; i < num_algs; i++) { | |
1474 | pos++; | |
1475 | if (pos >= num_algs) | |
1476 | pos = 0; | |
46900298 | 1477 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1478 | algs[pos] == 0xff) |
1479 | continue; | |
1480 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1481 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1482 | continue; |
46900298 | 1483 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1484 | break; |
1485 | } | |
1486 | } | |
1487 | return; | |
1488 | } | |
1489 | ||
46900298 | 1490 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1491 | case WLAN_AUTH_OPEN: |
1492 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1493 | case WLAN_AUTH_FT: |
46900298 | 1494 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1495 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1496 | break; |
1497 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1498 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1499 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1500 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1501 | } else | |
46900298 | 1502 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1503 | break; |
1504 | } | |
1505 | } | |
1506 | ||
1507 | ||
f698d856 | 1508 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1509 | struct ieee80211_mgmt *mgmt, |
1510 | size_t len) | |
1511 | { | |
46900298 | 1512 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1513 | u16 reason_code; |
1514 | ||
f4ea83dd | 1515 | if (len < 24 + 2) |
f0706e82 | 1516 | return; |
f0706e82 | 1517 | |
46900298 | 1518 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1519 | return; |
f0706e82 JB |
1520 | |
1521 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1522 | ||
46900298 | 1523 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1524 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1525 | sdata->dev->name, reason_code); | |
f0706e82 | 1526 | |
636a5d36 JM |
1527 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1528 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1529 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1530 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1531 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1532 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1533 | IEEE80211_RETRY_AUTH_INTERVAL); |
1534 | } | |
1535 | ||
46900298 JB |
1536 | ieee80211_set_disassoc(sdata, true, false, 0); |
1537 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1538 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1539 | } |
1540 | ||
1541 | ||
f698d856 | 1542 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1543 | struct ieee80211_mgmt *mgmt, |
1544 | size_t len) | |
1545 | { | |
46900298 | 1546 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1547 | u16 reason_code; |
1548 | ||
f4ea83dd | 1549 | if (len < 24 + 2) |
f0706e82 | 1550 | return; |
f0706e82 | 1551 | |
46900298 | 1552 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1553 | return; |
f0706e82 JB |
1554 | |
1555 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1556 | ||
46900298 | 1557 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1558 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1559 | sdata->dev->name, reason_code); | |
f0706e82 | 1560 | |
636a5d36 JM |
1561 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1562 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1563 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1564 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1565 | IEEE80211_RETRY_AUTH_INTERVAL); |
1566 | } | |
1567 | ||
46900298 | 1568 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1569 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1570 | } |
1571 | ||
1572 | ||
471b3efd | 1573 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1574 | struct ieee80211_mgmt *mgmt, |
1575 | size_t len, | |
1576 | int reassoc) | |
1577 | { | |
46900298 | 1578 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1579 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1580 | struct ieee80211_supported_band *sband; |
f0706e82 | 1581 | struct sta_info *sta; |
881d948c | 1582 | u32 rates, basic_rates; |
f0706e82 JB |
1583 | u16 capab_info, status_code, aid; |
1584 | struct ieee802_11_elems elems; | |
bda3933a | 1585 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1586 | u8 *pos; |
ae5eb026 | 1587 | u32 changed = 0; |
f0706e82 | 1588 | int i, j; |
ddf4ac53 | 1589 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1590 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1591 | |
1592 | /* AssocResp and ReassocResp have identical structure, so process both | |
1593 | * of them in this function. */ | |
1594 | ||
46900298 | 1595 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1596 | return; |
f0706e82 | 1597 | |
f4ea83dd | 1598 | if (len < 24 + 6) |
f0706e82 | 1599 | return; |
f0706e82 | 1600 | |
46900298 | 1601 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1602 | return; |
f0706e82 JB |
1603 | |
1604 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1605 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1606 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1607 | |
0c68ae26 | 1608 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1609 | "status=%d aid=%d)\n", |
0c68ae26 | 1610 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1611 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1612 | |
63a5ab82 JM |
1613 | pos = mgmt->u.assoc_resp.variable; |
1614 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1615 | ||
1616 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1617 | elems.timeout_int && elems.timeout_int_len == 5 && |
1618 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1619 | u32 tu, ms; |
f797eb7e | 1620 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1621 | ms = tu * 1024 / 1000; |
1622 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1623 | "comeback duration %u TU (%u ms)\n", | |
1624 | sdata->dev->name, tu, ms); | |
1625 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1626 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1627 | jiffies + msecs_to_jiffies(ms)); |
1628 | return; | |
1629 | } | |
1630 | ||
f0706e82 JB |
1631 | if (status_code != WLAN_STATUS_SUCCESS) { |
1632 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1633 | sdata->dev->name, status_code); |
8a69aa93 DD |
1634 | /* if this was a reassociation, ensure we try a "full" |
1635 | * association next time. This works around some broken APs | |
1636 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1637 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1638 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1639 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1640 | /* Wait for SME to decide what to do next */ | |
1641 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1642 | ieee80211_recalc_idle(local); |
66174bbe | 1643 | } |
f0706e82 JB |
1644 | return; |
1645 | } | |
1646 | ||
1dd84aa2 JB |
1647 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1648 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1649 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1650 | aid &= ~(BIT(15) | BIT(14)); |
1651 | ||
f0706e82 JB |
1652 | if (!elems.supp_rates) { |
1653 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1654 | sdata->dev->name); |
f0706e82 JB |
1655 | return; |
1656 | } | |
1657 | ||
f698d856 | 1658 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1659 | ifmgd->aid = aid; |
1660 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1661 | |
46900298 JB |
1662 | kfree(ifmgd->assocresp_ies); |
1663 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1664 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1665 | if (ifmgd->assocresp_ies) | |
1666 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1667 | |
d0709a65 JB |
1668 | rcu_read_lock(); |
1669 | ||
f0706e82 | 1670 | /* Add STA entry for the AP */ |
46900298 | 1671 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1672 | if (!sta) { |
ddf4ac53 | 1673 | newsta = true; |
d0709a65 | 1674 | |
46900298 | 1675 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1676 | if (!sta) { |
1677 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1678 | " the AP\n", sdata->dev->name); |
d0709a65 | 1679 | rcu_read_unlock(); |
f0706e82 JB |
1680 | return; |
1681 | } | |
f709fc69 | 1682 | |
60f8b39c JB |
1683 | /* update new sta with its last rx activity */ |
1684 | sta->last_rx = jiffies; | |
f709fc69 | 1685 | } |
f709fc69 | 1686 | |
60f8b39c JB |
1687 | /* |
1688 | * FIXME: Do we really need to update the sta_info's information here? | |
1689 | * We already know about the AP (we found it in our list) so it | |
1690 | * should already be filled with the right info, no? | |
1691 | * As is stands, all this is racy because typically we assume | |
1692 | * the information that is filled in here (except flags) doesn't | |
1693 | * change while a STA structure is alive. As such, it should move | |
1694 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1695 | */ | |
f709fc69 | 1696 | |
3f77316c JM |
1697 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP); |
1698 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1699 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
05e5e883 | 1700 | |
60f8b39c JB |
1701 | rates = 0; |
1702 | basic_rates = 0; | |
1703 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1704 | |
60f8b39c JB |
1705 | for (i = 0; i < elems.supp_rates_len; i++) { |
1706 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1707 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1708 | |
60f8b39c JB |
1709 | if (rate > 110) |
1710 | have_higher_than_11mbit = true; | |
1711 | ||
1712 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1713 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1714 | rates |= BIT(j); |
d61272cb TW |
1715 | if (is_basic) |
1716 | basic_rates |= BIT(j); | |
1717 | break; | |
1718 | } | |
f709fc69 | 1719 | } |
f709fc69 LCC |
1720 | } |
1721 | ||
60f8b39c JB |
1722 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1723 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1724 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1725 | |
60f8b39c JB |
1726 | if (rate > 110) |
1727 | have_higher_than_11mbit = true; | |
f0706e82 | 1728 | |
60f8b39c | 1729 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1730 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1731 | rates |= BIT(j); |
d61272cb TW |
1732 | if (is_basic) |
1733 | basic_rates |= BIT(j); | |
1734 | break; | |
1735 | } | |
60f8b39c | 1736 | } |
1ebebea8 | 1737 | } |
f0706e82 | 1738 | |
323ce79a | 1739 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1740 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1741 | |
1742 | /* cf. IEEE 802.11 9.2.12 */ | |
1743 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1744 | have_higher_than_11mbit) | |
1745 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1746 | else | |
1747 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1748 | |
e65c2263 S |
1749 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1750 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1751 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1752 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1753 | |
1754 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1755 | |
4b7679a5 | 1756 | rate_control_rate_init(sta); |
f0706e82 | 1757 | |
46900298 | 1758 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1759 | set_sta_flags(sta, WLAN_STA_MFP); |
1760 | ||
ddf4ac53 | 1761 | if (elems.wmm_param) |
60f8b39c | 1762 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1763 | |
1764 | if (newsta) { | |
1765 | int err = sta_info_insert(sta); | |
1766 | if (err) { | |
1767 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1768 | " the AP (error %d)\n", sdata->dev->name, err); | |
1769 | rcu_read_unlock(); | |
1770 | return; | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | rcu_read_unlock(); | |
1775 | ||
1776 | if (elems.wmm_param) | |
46900298 | 1777 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1778 | elems.wmm_param_len); |
aa837e1d JB |
1779 | else |
1780 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1781 | |
ae5eb026 | 1782 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1783 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1784 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1785 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1786 | ap_ht_cap_flags); | |
1787 | ||
60f8b39c JB |
1788 | /* set AID and assoc capability, |
1789 | * ieee80211_set_associated() will tell the driver */ | |
1790 | bss_conf->aid = aid; | |
1791 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1792 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1793 | |
15b7b062 KV |
1794 | /* |
1795 | * initialise the time of last beacon to be the association time, | |
1796 | * otherwise beacon loss check will trigger immediately | |
1797 | */ | |
1798 | ifmgd->last_beacon = jiffies; | |
1799 | ||
46900298 | 1800 | ieee80211_associated(sdata); |
6039f6d2 | 1801 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1802 | } |
1803 | ||
1804 | ||
98c8fccf JB |
1805 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1806 | struct ieee80211_mgmt *mgmt, | |
1807 | size_t len, | |
1808 | struct ieee80211_rx_status *rx_status, | |
1809 | struct ieee802_11_elems *elems, | |
1810 | bool beacon) | |
1811 | { | |
1812 | struct ieee80211_local *local = sdata->local; | |
1813 | int freq; | |
c2b13452 | 1814 | struct ieee80211_bss *bss; |
98c8fccf | 1815 | struct ieee80211_channel *channel; |
98c8fccf JB |
1816 | |
1817 | if (elems->ds_params && elems->ds_params_len == 1) | |
1818 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1819 | else | |
1820 | freq = rx_status->freq; | |
1821 | ||
1822 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1823 | ||
1824 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1825 | return; | |
1826 | ||
98c8fccf | 1827 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1828 | channel, beacon); |
98c8fccf JB |
1829 | if (!bss) |
1830 | return; | |
1831 | ||
c481ec97 | 1832 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1833 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1834 | struct ieee80211_channel_sw_ie *sw_elem = |
1835 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
cc32abd4 | 1836 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
c481ec97 S |
1837 | } |
1838 | ||
3e122be0 | 1839 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1840 | } |
1841 | ||
1842 | ||
f698d856 | 1843 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1844 | struct ieee80211_mgmt *mgmt, |
1845 | size_t len, | |
1846 | struct ieee80211_rx_status *rx_status) | |
1847 | { | |
15b7b062 | 1848 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1849 | size_t baselen; |
1850 | struct ieee802_11_elems elems; | |
1851 | ||
15b7b062 KV |
1852 | ifmgd = &sdata->u.mgd; |
1853 | ||
8e7cdbb6 TW |
1854 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1855 | return; /* ignore ProbeResp to foreign address */ | |
1856 | ||
ae6a44e3 EK |
1857 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1858 | if (baselen > len) | |
1859 | return; | |
1860 | ||
1861 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1862 | &elems); | |
1863 | ||
98c8fccf | 1864 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1865 | |
1866 | /* direct probe may be part of the association flow */ | |
16cf438a | 1867 | if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
9859b81e RR |
1868 | printk(KERN_DEBUG "%s direct probe responded\n", |
1869 | sdata->dev->name); | |
46900298 | 1870 | ieee80211_authenticate(sdata); |
9859b81e | 1871 | } |
15b7b062 KV |
1872 | |
1873 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1874 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1875 | } |
1876 | ||
d91f36db JB |
1877 | /* |
1878 | * This is the canonical list of information elements we care about, | |
1879 | * the filter code also gives us all changes to the Microsoft OUI | |
1880 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1881 | * | |
1882 | * We implement beacon filtering in software since that means we can | |
1883 | * avoid processing the frame here and in cfg80211, and userspace | |
1884 | * will not be able to tell whether the hardware supports it or not. | |
1885 | * | |
1886 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1887 | * add items it requires. It also needs to be able to tell us to | |
1888 | * look out for other vendor IEs. | |
1889 | */ | |
1890 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1891 | (1ULL << WLAN_EID_COUNTRY) | |
1892 | (1ULL << WLAN_EID_ERP_INFO) | | |
1893 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1894 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1895 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1896 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1897 | |
f698d856 | 1898 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1899 | struct ieee80211_mgmt *mgmt, |
1900 | size_t len, | |
1901 | struct ieee80211_rx_status *rx_status) | |
1902 | { | |
d91f36db | 1903 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1904 | size_t baselen; |
1905 | struct ieee802_11_elems elems; | |
f698d856 | 1906 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1907 | u32 changed = 0; |
d91f36db | 1908 | bool erp_valid, directed_tim = false; |
7a5158ef | 1909 | u8 erp_value = 0; |
d91f36db | 1910 | u32 ncrc; |
f0706e82 | 1911 | |
ae6a44e3 EK |
1912 | /* Process beacon from the current BSS */ |
1913 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1914 | if (baselen > len) | |
1915 | return; | |
1916 | ||
d91f36db | 1917 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1918 | return; |
f0706e82 | 1919 | |
46900298 JB |
1920 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1921 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1922 | return; |
1923 | ||
92778180 JM |
1924 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
1925 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1926 | if (net_ratelimit()) { | |
1927 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
1928 | "to a received beacon\n", sdata->dev->name); | |
1929 | } | |
1930 | #endif | |
1931 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1932 | } | |
1933 | ||
d91f36db JB |
1934 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1935 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1936 | len - baselen, &elems, | |
1937 | care_about_ies, ncrc); | |
1938 | ||
1939 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1940 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1941 | ifmgd->aid); | |
d91f36db JB |
1942 | |
1943 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1944 | ||
1945 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1946 | return; |
d91f36db JB |
1947 | ifmgd->beacon_crc = ncrc; |
1948 | ||
1949 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1950 | |
46900298 | 1951 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1952 | elems.wmm_param_len); |
1953 | ||
25c9c875 | 1954 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1955 | if (directed_tim) { |
572e0012 KV |
1956 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1957 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1958 | ieee80211_hw_config(local, | |
1959 | IEEE80211_CONF_CHANGE_PS); | |
1960 | ieee80211_send_nullfunc(local, sdata, 0); | |
1961 | } else { | |
1962 | local->pspolling = true; | |
1963 | ||
1964 | /* | |
1965 | * Here is assumed that the driver will be | |
1966 | * able to send ps-poll frame and receive a | |
1967 | * response even though power save mode is | |
1968 | * enabled, but some drivers might require | |
1969 | * to disable power save here. This needs | |
1970 | * to be investigated. | |
1971 | */ | |
1972 | ieee80211_send_pspoll(local, sdata); | |
1973 | } | |
a97b77b9 VN |
1974 | } |
1975 | } | |
7a5158ef JB |
1976 | |
1977 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1978 | erp_valid = true; | |
1979 | erp_value = elems.erp_info[0]; | |
1980 | } else { | |
1981 | erp_valid = false; | |
50c4afb9 | 1982 | } |
7a5158ef JB |
1983 | changed |= ieee80211_handle_bss_capability(sdata, |
1984 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1985 | erp_valid, erp_value); | |
f0706e82 | 1986 | |
d3c990fb | 1987 | |
53d6f81c | 1988 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1989 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1990 | struct sta_info *sta; |
1991 | struct ieee80211_supported_band *sband; | |
1992 | u16 ap_ht_cap_flags; | |
1993 | ||
1994 | rcu_read_lock(); | |
1995 | ||
46900298 | 1996 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1997 | if (!sta) { |
1998 | rcu_read_unlock(); | |
1999 | return; | |
2000 | } | |
2001 | ||
2002 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2003 | ||
2004 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
2005 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
2006 | ||
2007 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
2008 | ||
2009 | rcu_read_unlock(); | |
2010 | ||
2011 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
2012 | ap_ht_cap_flags); | |
d3c990fb RR |
2013 | } |
2014 | ||
3f2355cb LR |
2015 | if (elems.country_elem) { |
2016 | /* Note we are only reviewing this on beacons | |
2017 | * for the BSSID we are associated to */ | |
2018 | regulatory_hint_11d(local->hw.wiphy, | |
2019 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
2020 | |
2021 | /* TODO: IBSS also needs this */ | |
2022 | if (elems.pwr_constr_elem) | |
2023 | ieee80211_handle_pwr_constr(sdata, | |
2024 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
2025 | elems.pwr_constr_elem, | |
2026 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
2027 | } |
2028 | ||
471b3efd | 2029 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2030 | } |
2031 | ||
46900298 JB |
2032 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
2033 | struct sk_buff *skb, | |
2034 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 2035 | { |
f698d856 | 2036 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2037 | struct ieee80211_mgmt *mgmt; |
2038 | u16 fc; | |
2039 | ||
2040 | if (skb->len < 24) | |
46900298 | 2041 | return RX_DROP_MONITOR; |
f0706e82 JB |
2042 | |
2043 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2044 | fc = le16_to_cpu(mgmt->frame_control); | |
2045 | ||
2046 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2047 | case IEEE80211_STYPE_PROBE_REQ: | |
2048 | case IEEE80211_STYPE_PROBE_RESP: | |
2049 | case IEEE80211_STYPE_BEACON: | |
2050 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
2051 | case IEEE80211_STYPE_AUTH: | |
2052 | case IEEE80211_STYPE_ASSOC_RESP: | |
2053 | case IEEE80211_STYPE_REASSOC_RESP: | |
2054 | case IEEE80211_STYPE_DEAUTH: | |
2055 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
2056 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
2057 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
2058 | return RX_QUEUED; | |
f0706e82 JB |
2059 | } |
2060 | ||
46900298 | 2061 | return RX_DROP_MONITOR; |
f0706e82 JB |
2062 | } |
2063 | ||
f698d856 | 2064 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2065 | struct sk_buff *skb) |
2066 | { | |
2067 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
2068 | struct ieee80211_mgmt *mgmt; |
2069 | u16 fc; | |
2070 | ||
f0706e82 JB |
2071 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
2072 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2073 | fc = le16_to_cpu(mgmt->frame_control); | |
2074 | ||
46900298 JB |
2075 | switch (fc & IEEE80211_FCTL_STYPE) { |
2076 | case IEEE80211_STYPE_PROBE_RESP: | |
2077 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
2078 | rx_status); | |
2079 | break; | |
2080 | case IEEE80211_STYPE_BEACON: | |
2081 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
2082 | rx_status); | |
2083 | break; | |
2084 | case IEEE80211_STYPE_AUTH: | |
2085 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
2086 | break; | |
2087 | case IEEE80211_STYPE_ASSOC_RESP: | |
2088 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
2089 | break; | |
2090 | case IEEE80211_STYPE_REASSOC_RESP: | |
2091 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
2092 | break; | |
2093 | case IEEE80211_STYPE_DEAUTH: | |
2094 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
2095 | break; | |
2096 | case IEEE80211_STYPE_DISASSOC: | |
2097 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
2098 | break; | |
f0706e82 JB |
2099 | } |
2100 | ||
2101 | kfree_skb(skb); | |
2102 | } | |
2103 | ||
9c6bd790 | 2104 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 2105 | { |
60f8b39c JB |
2106 | struct ieee80211_sub_if_data *sdata = |
2107 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2108 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2109 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2110 | |
46900298 JB |
2111 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2112 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
2113 | } |
2114 | ||
46900298 | 2115 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2116 | { |
46900298 | 2117 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2118 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2119 | |
24487981 JB |
2120 | /* Reset own TSF to allow time synchronization work. */ |
2121 | drv_reset_tsf(local); | |
f0706e82 | 2122 | |
46900298 | 2123 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
2124 | |
2125 | ||
46900298 JB |
2126 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
2127 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
2128 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2129 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2130 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2131 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
2132 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
2133 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 2134 | else |
46900298 JB |
2135 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
2136 | ifmgd->auth_transaction = -1; | |
2137 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2138 | ifmgd->assoc_scan_tries = 0; | |
2139 | ifmgd->direct_probe_tries = 0; | |
2140 | ifmgd->auth_tries = 0; | |
2141 | ifmgd->assoc_tries = 0; | |
24e64622 | 2142 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2143 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2144 | } |
2145 | ||
46900298 | 2146 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2147 | { |
46900298 | 2148 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2149 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2150 | struct ieee80211_bss *bss; |
46900298 JB |
2151 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2152 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2153 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2154 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2155 | struct ieee80211_channel *chan = local->oper_channel; | |
2156 | ||
636a5d36 JM |
2157 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2158 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2159 | IEEE80211_STA_AUTO_BSSID_SEL | |
2160 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2161 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2162 | if (sdata->default_key) | |
2163 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2164 | } |
9d139c81 | 2165 | |
46900298 | 2166 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2167 | chan = NULL; |
2168 | ||
46900298 | 2169 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2170 | bssid = NULL; |
2171 | ||
46900298 | 2172 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2173 | ssid = NULL; |
2174 | ssid_len = 0; | |
2175 | } | |
2176 | ||
2177 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2178 | bssid, ssid, ssid_len, | |
2179 | capa_mask, capa_val); | |
2180 | ||
2181 | if (bss) { | |
2182 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2183 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2184 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2185 | bss->ssid_len); | |
2186 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2187 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2188 | bss->supp_rates); | |
46900298 JB |
2189 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2190 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2191 | else |
46900298 | 2192 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2193 | |
9c6bd790 JB |
2194 | /* Send out direct probe if no probe resp was received or |
2195 | * the one we have is outdated | |
2196 | */ | |
00d3f14c JB |
2197 | if (!bss->last_probe_resp || |
2198 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2199 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2200 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2201 | else |
46900298 | 2202 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2203 | |
00d3f14c | 2204 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2205 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2206 | return 0; |
2207 | } else { | |
46900298 | 2208 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 | 2209 | |
46900298 | 2210 | ifmgd->assoc_scan_tries++; |
af88b907 | 2211 | |
f3b85252 JB |
2212 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2213 | ssid_len); | |
af88b907 | 2214 | |
46900298 JB |
2215 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2216 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2217 | } else { |
46900298 JB |
2218 | ifmgd->assoc_scan_tries = 0; |
2219 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 2220 | ieee80211_recalc_idle(local); |
e374055a | 2221 | } |
9c6bd790 JB |
2222 | } |
2223 | return -1; | |
2224 | } | |
2225 | ||
2226 | ||
2227 | static void ieee80211_sta_work(struct work_struct *work) | |
2228 | { | |
2229 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2230 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2231 | struct ieee80211_local *local = sdata->local; |
46900298 | 2232 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2233 | struct sk_buff *skb; |
2234 | ||
2235 | if (!netif_running(sdata->dev)) | |
2236 | return; | |
2237 | ||
c2b13452 | 2238 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2239 | return; |
2240 | ||
46900298 | 2241 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2242 | return; |
46900298 | 2243 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2244 | |
46900298 | 2245 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2246 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2247 | ||
46900298 JB |
2248 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2249 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2250 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2251 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2252 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2253 | round_jiffies_relative(0)); | |
9c6bd790 | 2254 | return; |
f0706e82 JB |
2255 | } |
2256 | ||
46900298 JB |
2257 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2258 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2259 | return; |
46900298 JB |
2260 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2261 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2262 | return; |
d6f2da5b | 2263 | |
5cff20e6 JB |
2264 | ieee80211_recalc_idle(local); |
2265 | ||
46900298 | 2266 | switch (ifmgd->state) { |
9c6bd790 JB |
2267 | case IEEE80211_STA_MLME_DISABLED: |
2268 | break; | |
2269 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2270 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2271 | break; |
2272 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2273 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2274 | break; |
2275 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2276 | ieee80211_associate(sdata); |
9c6bd790 JB |
2277 | break; |
2278 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2279 | ieee80211_associated(sdata); |
9c6bd790 JB |
2280 | break; |
2281 | default: | |
2282 | WARN_ON(1); | |
2283 | break; | |
2284 | } | |
2285 | ||
46900298 | 2286 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2287 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2288 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2289 | ||
46900298 | 2290 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2291 | WLAN_REASON_UNSPECIFIED); |
2292 | } | |
f0706e82 JB |
2293 | } |
2294 | ||
9c6bd790 JB |
2295 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2296 | { | |
ad935687 KV |
2297 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2298 | /* | |
2299 | * Need to update last_beacon to avoid beacon loss | |
2300 | * test to trigger. | |
2301 | */ | |
2302 | sdata->u.mgd.last_beacon = jiffies; | |
2303 | ||
2304 | ||
9c6bd790 | 2305 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2306 | &sdata->u.mgd.work); |
ad935687 | 2307 | } |
9c6bd790 | 2308 | } |
f0706e82 | 2309 | |
9c6bd790 JB |
2310 | /* interface setup */ |
2311 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2312 | { |
46900298 | 2313 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2314 | u32 hw_flags; |
988c0f72 | 2315 | |
46900298 JB |
2316 | ifmgd = &sdata->u.mgd; |
2317 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2318 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2319 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2320 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2321 | (unsigned long) sdata); |
46900298 | 2322 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2323 | (unsigned long) sdata); |
46900298 | 2324 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2325 | |
46900298 JB |
2326 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2327 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2328 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2329 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2330 | IEEE80211_STA_AUTO_BSSID_SEL | |
2331 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2332 | if (sdata->local->hw.queues >= 4) |
46900298 | 2333 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2334 | |
2335 | hw_flags = sdata->local->hw.flags; | |
2336 | ||
2337 | if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { | |
2338 | ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; | |
2339 | sdata->local->hw.conf.dynamic_ps_timeout = 500; | |
2340 | } | |
f0706e82 JB |
2341 | } |
2342 | ||
9c6bd790 | 2343 | /* configuration hooks */ |
46900298 | 2344 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2345 | { |
46900298 | 2346 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2347 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2348 | |
46900298 | 2349 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2350 | return; |
60f8b39c | 2351 | |
46900298 | 2352 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2353 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2354 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2355 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2356 | |
46900298 JB |
2357 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2358 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2359 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2360 | |
636a5d36 JM |
2361 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2362 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2363 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2364 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2365 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2366 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2367 | } |
2368 | } | |
60f8b39c | 2369 | |
79f6440c AF |
2370 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2371 | { | |
2372 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2373 | ||
79f6440c AF |
2374 | if (ifmgd->ssid_len) |
2375 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2376 | else | |
2377 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2378 | ||
2379 | return 0; | |
2380 | } | |
2381 | ||
9c6bd790 JB |
2382 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2383 | { | |
46900298 | 2384 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2385 | |
9c6bd790 JB |
2386 | if (len > IEEE80211_MAX_SSID_LEN) |
2387 | return -EINVAL; | |
2388 | ||
46900298 | 2389 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2390 | |
46900298 | 2391 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2392 | /* |
2393 | * Do not use reassociation if SSID is changed (different ESS). | |
2394 | */ | |
2395 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2396 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2397 | memcpy(ifmgd->ssid, ssid, len); | |
2398 | ifmgd->ssid_len = len; | |
60f8b39c | 2399 | } |
60f8b39c | 2400 | |
79f6440c | 2401 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2402 | } |
2403 | ||
2404 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2405 | { | |
46900298 JB |
2406 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2407 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2408 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2409 | return 0; |
2410 | } | |
2411 | ||
2412 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2413 | { | |
46900298 | 2414 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2415 | |
dfe67012 | 2416 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2417 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2418 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2419 | } else { |
46900298 JB |
2420 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2421 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2422 | } |
2423 | ||
2d0ddec5 JB |
2424 | if (netif_running(sdata->dev)) |
2425 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
60f8b39c | 2426 | |
79f6440c | 2427 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2428 | } |
2429 | ||
636a5d36 JM |
2430 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2431 | const char *ie, size_t len) | |
9c6bd790 | 2432 | { |
46900298 | 2433 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2434 | |
46900298 | 2435 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2436 | if (len == 0) { |
46900298 JB |
2437 | ifmgd->extra_ie = NULL; |
2438 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2439 | return 0; |
60f8b39c | 2440 | } |
46900298 JB |
2441 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2442 | if (!ifmgd->extra_ie) { | |
2443 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2444 | return -ENOMEM; |
2445 | } | |
46900298 JB |
2446 | memcpy(ifmgd->extra_ie, ie, len); |
2447 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2448 | return 0; |
60f8b39c JB |
2449 | } |
2450 | ||
f698d856 | 2451 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2452 | { |
f4ea83dd | 2453 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2454 | sdata->dev->name, reason); |
f0706e82 | 2455 | |
46900298 | 2456 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2457 | return 0; |
2458 | } | |
2459 | ||
f698d856 | 2460 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2461 | { |
46900298 | 2462 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2463 | |
f4ea83dd | 2464 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2465 | sdata->dev->name, reason); |
f0706e82 | 2466 | |
46900298 JB |
2467 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2468 | return -ENOLINK; | |
f0706e82 | 2469 | |
46900298 | 2470 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2471 | return 0; |
2472 | } | |
84363e6e | 2473 | |
9c6bd790 JB |
2474 | /* scan finished notification */ |
2475 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2476 | { | |
2477 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2478 | |
2479 | /* Restart STA timers */ | |
2480 | rcu_read_lock(); | |
2481 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2482 | ieee80211_restart_sta_timer(sdata); | |
2483 | rcu_read_unlock(); | |
2484 | } | |
10f644a4 JB |
2485 | |
2486 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2487 | unsigned long data, void *dummy) | |
2488 | { | |
2489 | s32 latency_usec = (s32) data; | |
2490 | struct ieee80211_local *local = | |
2491 | container_of(nb, struct ieee80211_local, | |
2492 | network_latency_notifier); | |
2493 | ||
2494 | mutex_lock(&local->iflist_mtx); | |
2495 | ieee80211_recalc_ps(local, latency_usec); | |
2496 | mutex_unlock(&local->iflist_mtx); | |
2497 | ||
2498 | return 0; | |
2499 | } |