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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) | |
a971be22 | 36 | #define IEEE80211_PROBE_WAIT (HZ / 5) |
15b7b062 | 37 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 38 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 39 | |
5bb644a0 JB |
40 | #define TMR_RUNNING_TIMER 0 |
41 | #define TMR_RUNNING_CHANSW 1 | |
42 | ||
5484e237 JB |
43 | /* utils */ |
44 | static int ecw2cw(int ecw) | |
60f8b39c | 45 | { |
5484e237 | 46 | return (1 << ecw) - 1; |
60f8b39c JB |
47 | } |
48 | ||
c2b13452 | 49 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
50 | { |
51 | u8 *end, *pos; | |
52 | ||
00d3f14c | 53 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
54 | if (pos == NULL) |
55 | return NULL; | |
00d3f14c | 56 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
57 | |
58 | while (pos + 1 < end) { | |
59 | if (pos + 2 + pos[1] > end) | |
60 | break; | |
61 | if (pos[0] == ie) | |
62 | return pos; | |
63 | pos += 2 + pos[1]; | |
64 | } | |
65 | ||
66 | return NULL; | |
67 | } | |
68 | ||
c2b13452 | 69 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 70 | struct ieee80211_supported_band *sband, |
881d948c | 71 | u32 *rates) |
9ac19a90 JB |
72 | { |
73 | int i, j, count; | |
74 | *rates = 0; | |
75 | count = 0; | |
76 | for (i = 0; i < bss->supp_rates_len; i++) { | |
77 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
78 | ||
79 | for (j = 0; j < sband->n_bitrates; j++) | |
80 | if (sband->bitrates[j].bitrate == rate) { | |
81 | *rates |= BIT(j); | |
82 | count++; | |
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | return count; | |
88 | } | |
89 | ||
d5522e03 JB |
90 | /* |
91 | * ieee80211_enable_ht should be called only after the operating band | |
92 | * has been determined as ht configuration depends on the hw's | |
93 | * HT abilities for a specific band. | |
94 | */ | |
95 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
96 | struct ieee80211_ht_info *hti, | |
97 | u16 ap_ht_cap_flags) | |
98 | { | |
99 | struct ieee80211_local *local = sdata->local; | |
100 | struct ieee80211_supported_band *sband; | |
101 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
d5522e03 JB |
102 | struct sta_info *sta; |
103 | u32 changed = 0; | |
9ed6bcce | 104 | u16 ht_opmode; |
d5522e03 JB |
105 | bool enable_ht = true, ht_changed; |
106 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
107 | ||
108 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
109 | ||
d5522e03 JB |
110 | /* HT is not supported */ |
111 | if (!sband->ht_cap.ht_supported) | |
112 | enable_ht = false; | |
113 | ||
114 | /* check that channel matches the right operating channel */ | |
115 | if (local->hw.conf.channel->center_freq != | |
116 | ieee80211_channel_to_frequency(hti->control_chan)) | |
117 | enable_ht = false; | |
118 | ||
119 | if (enable_ht) { | |
120 | channel_type = NL80211_CHAN_HT20; | |
121 | ||
122 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
123 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
124 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
125 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
126 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
127 | if (!(local->hw.conf.channel->flags & |
128 | IEEE80211_CHAN_NO_HT40PLUS)) | |
129 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
130 | break; |
131 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
132 | if (!(local->hw.conf.channel->flags & |
133 | IEEE80211_CHAN_NO_HT40MINUS)) | |
134 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
135 | break; |
136 | } | |
137 | } | |
138 | } | |
139 | ||
140 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
141 | channel_type != local->hw.conf.channel_type; | |
142 | ||
143 | local->oper_channel_type = channel_type; | |
144 | ||
145 | if (ht_changed) { | |
146 | /* channel_type change automatically detected */ | |
147 | ieee80211_hw_config(local, 0); | |
148 | ||
149 | rcu_read_lock(); | |
150 | ||
151 | sta = sta_info_get(local, ifmgd->bssid); | |
152 | if (sta) | |
153 | rate_control_rate_update(local, sband, sta, | |
154 | IEEE80211_RC_HT_CHANGED); | |
155 | ||
156 | rcu_read_unlock(); | |
d5522e03 JB |
157 | } |
158 | ||
159 | /* disable HT */ | |
160 | if (!enable_ht) | |
161 | return 0; | |
162 | ||
9ed6bcce | 163 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
164 | |
165 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
166 | if (!sdata->ht_opmode_valid || |
167 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 168 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 169 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 170 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
171 | } |
172 | ||
173 | return changed; | |
174 | } | |
175 | ||
9c6bd790 JB |
176 | /* frame sending functions */ |
177 | ||
46900298 | 178 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 179 | { |
46900298 | 180 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
181 | struct ieee80211_local *local = sdata->local; |
182 | struct sk_buff *skb; | |
183 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 184 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
185 | int i, len, count, rates_len, supp_rates_len; |
186 | u16 capab; | |
c2b13452 | 187 | struct ieee80211_bss *bss; |
9ac19a90 JB |
188 | int wmm = 0; |
189 | struct ieee80211_supported_band *sband; | |
881d948c | 190 | u32 rates = 0; |
9ac19a90 JB |
191 | |
192 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 193 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 194 | ifmgd->ssid_len); |
9ac19a90 JB |
195 | if (!skb) { |
196 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
197 | "frame\n", sdata->dev->name); | |
198 | return; | |
199 | } | |
200 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
201 | ||
202 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
203 | ||
46900298 | 204 | capab = ifmgd->capab; |
9ac19a90 JB |
205 | |
206 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
207 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
208 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
209 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
210 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
211 | } | |
212 | ||
46900298 | 213 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 214 | local->hw.conf.channel->center_freq, |
46900298 | 215 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 216 | if (bss) { |
00d3f14c | 217 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
218 | capab |= WLAN_CAPABILITY_PRIVACY; |
219 | if (bss->wmm_used) | |
220 | wmm = 1; | |
221 | ||
222 | /* get all rates supported by the device and the AP as | |
223 | * some APs don't like getting a superset of their rates | |
224 | * in the association request (e.g. D-Link DAP 1353 in | |
225 | * b-only mode) */ | |
226 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
227 | ||
00d3f14c | 228 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
229 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
230 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
231 | ||
232 | ieee80211_rx_bss_put(local, bss); | |
233 | } else { | |
234 | rates = ~0; | |
235 | rates_len = sband->n_bitrates; | |
236 | } | |
237 | ||
238 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
239 | memset(mgmt, 0, 24); | |
46900298 | 240 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 241 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 242 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 243 | |
46900298 | 244 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
245 | skb_put(skb, 10); |
246 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
247 | IEEE80211_STYPE_REASSOC_REQ); | |
248 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
249 | mgmt->u.reassoc_req.listen_interval = | |
250 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 251 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
252 | ETH_ALEN); |
253 | } else { | |
254 | skb_put(skb, 4); | |
255 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
256 | IEEE80211_STYPE_ASSOC_REQ); | |
257 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 258 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
259 | cpu_to_le16(local->hw.conf.listen_interval); |
260 | } | |
261 | ||
262 | /* SSID */ | |
46900298 | 263 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 264 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
265 | *pos++ = ifmgd->ssid_len; |
266 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
267 | |
268 | /* add all rates which were marked to be used above */ | |
269 | supp_rates_len = rates_len; | |
270 | if (supp_rates_len > 8) | |
271 | supp_rates_len = 8; | |
272 | ||
273 | len = sband->n_bitrates; | |
274 | pos = skb_put(skb, supp_rates_len + 2); | |
275 | *pos++ = WLAN_EID_SUPP_RATES; | |
276 | *pos++ = supp_rates_len; | |
277 | ||
278 | count = 0; | |
279 | for (i = 0; i < sband->n_bitrates; i++) { | |
280 | if (BIT(i) & rates) { | |
281 | int rate = sband->bitrates[i].bitrate; | |
282 | *pos++ = (u8) (rate / 5); | |
283 | if (++count == 8) | |
284 | break; | |
285 | } | |
286 | } | |
287 | ||
288 | if (rates_len > count) { | |
289 | pos = skb_put(skb, rates_len - count + 2); | |
290 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
291 | *pos++ = rates_len - count; | |
292 | ||
293 | for (i++; i < sband->n_bitrates; i++) { | |
294 | if (BIT(i) & rates) { | |
295 | int rate = sband->bitrates[i].bitrate; | |
296 | *pos++ = (u8) (rate / 5); | |
297 | } | |
298 | } | |
299 | } | |
300 | ||
301 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
302 | /* 1. power capabilities */ | |
303 | pos = skb_put(skb, 4); | |
304 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
305 | *pos++ = 2; | |
306 | *pos++ = 0; /* min tx power */ | |
307 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
308 | ||
309 | /* 2. supported channels */ | |
310 | /* TODO: get this in reg domain format */ | |
311 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
312 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
313 | *pos++ = 2 * sband->n_channels; | |
314 | for (i = 0; i < sband->n_channels; i++) { | |
315 | *pos++ = ieee80211_frequency_to_channel( | |
316 | sband->channels[i].center_freq); | |
317 | *pos++ = 1; /* one channel in the subband*/ | |
318 | } | |
319 | } | |
320 | ||
46900298 JB |
321 | if (ifmgd->extra_ie) { |
322 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
323 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
324 | } |
325 | ||
46900298 | 326 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
327 | pos = skb_put(skb, 9); |
328 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
329 | *pos++ = 7; /* len */ | |
330 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
331 | *pos++ = 0x50; | |
332 | *pos++ = 0xf2; | |
333 | *pos++ = 2; /* WME */ | |
334 | *pos++ = 0; /* WME info */ | |
335 | *pos++ = 1; /* WME ver */ | |
336 | *pos++ = 0; | |
337 | } | |
338 | ||
339 | /* wmm support is a must to HT */ | |
eb46936b VT |
340 | /* |
341 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
342 | * ciphers in HT mode. We still associate in non-ht | |
343 | * mode (11a/b/g) if any one of these ciphers is | |
344 | * configured as pairwise. | |
345 | */ | |
46900298 | 346 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
347 | sband->ht_cap.ht_supported && |
348 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 349 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
ab1faead | 350 | (!(ifmgd->flags & IEEE80211_STA_DISABLE_11N))) { |
d9fe60de JB |
351 | struct ieee80211_ht_info *ht_info = |
352 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
353 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
354 | __le16 tmp; |
355 | u32 flags = local->hw.conf.channel->flags; | |
356 | ||
d9fe60de JB |
357 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
358 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
689da1b3 | 359 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
d9fe60de | 360 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
361 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
362 | } | |
363 | break; | |
d9fe60de | 364 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
689da1b3 | 365 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
d9fe60de | 366 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
367 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
368 | } | |
369 | break; | |
370 | } | |
371 | ||
372 | tmp = cpu_to_le16(cap); | |
373 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
374 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
375 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
376 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
377 | memcpy(pos, &tmp, sizeof(u16)); | |
378 | pos += sizeof(u16); | |
379 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
380 | *pos++ = sband->ht_cap.ampdu_factor | |
381 | (sband->ht_cap.ampdu_density << 2); | |
382 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
383 | } |
384 | ||
46900298 JB |
385 | kfree(ifmgd->assocreq_ies); |
386 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
387 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
388 | if (ifmgd->assocreq_ies) | |
389 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 390 | |
e50db65c | 391 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
392 | } |
393 | ||
394 | ||
ef422bc0 JB |
395 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
396 | u16 stype, u16 reason) | |
9ac19a90 JB |
397 | { |
398 | struct ieee80211_local *local = sdata->local; | |
46900298 | 399 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
400 | struct sk_buff *skb; |
401 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 402 | |
65fc73ac | 403 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 404 | if (!skb) { |
ef422bc0 JB |
405 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
406 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
407 | return; |
408 | } | |
409 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
410 | ||
411 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
412 | memset(mgmt, 0, 24); | |
46900298 | 413 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 414 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 415 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 416 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 417 | skb_put(skb, 2); |
ef422bc0 | 418 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
419 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
420 | ||
53b46b84 | 421 | if (stype == IEEE80211_STYPE_DEAUTH) |
e6d6e342 JB |
422 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len, |
423 | GFP_KERNEL); | |
53b46b84 | 424 | else |
e6d6e342 JB |
425 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len, |
426 | GFP_KERNEL); | |
46900298 | 427 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
428 | } |
429 | ||
572e0012 KV |
430 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
431 | struct ieee80211_sub_if_data *sdata) | |
432 | { | |
46900298 | 433 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
434 | struct ieee80211_pspoll *pspoll; |
435 | struct sk_buff *skb; | |
436 | u16 fc; | |
437 | ||
438 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
439 | if (!skb) { | |
440 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
441 | "pspoll frame\n", sdata->dev->name); | |
442 | return; | |
443 | } | |
444 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
445 | ||
446 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
447 | memset(pspoll, 0, sizeof(*pspoll)); | |
448 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
449 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 450 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
451 | |
452 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
453 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
454 | ||
46900298 | 455 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
456 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
457 | ||
458 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
459 | } |
460 | ||
965bedad JB |
461 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
462 | struct ieee80211_sub_if_data *sdata, | |
463 | int powersave) | |
464 | { | |
465 | struct sk_buff *skb; | |
466 | struct ieee80211_hdr *nullfunc; | |
467 | __le16 fc; | |
468 | ||
469 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
470 | return; | |
471 | ||
472 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
473 | if (!skb) { | |
474 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
475 | "frame\n", sdata->dev->name); | |
476 | return; | |
477 | } | |
478 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
479 | ||
480 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
481 | memset(nullfunc, 0, 24); | |
482 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
483 | IEEE80211_FCTL_TODS); | |
484 | if (powersave) | |
485 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
486 | nullfunc->frame_control = fc; | |
487 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
488 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
489 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
490 | ||
491 | ieee80211_tx_skb(sdata, skb, 0); | |
492 | } | |
493 | ||
cc32abd4 JB |
494 | /* spectrum management related things */ |
495 | static void ieee80211_chswitch_work(struct work_struct *work) | |
496 | { | |
497 | struct ieee80211_sub_if_data *sdata = | |
498 | container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); | |
499 | struct ieee80211_bss *bss; | |
500 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
501 | ||
502 | if (!netif_running(sdata->dev)) | |
503 | return; | |
504 | ||
505 | bss = ieee80211_rx_bss_get(sdata->local, ifmgd->bssid, | |
506 | sdata->local->hw.conf.channel->center_freq, | |
507 | ifmgd->ssid, ifmgd->ssid_len); | |
508 | if (!bss) | |
509 | goto exit; | |
510 | ||
511 | sdata->local->oper_channel = sdata->local->csa_channel; | |
512 | /* XXX: shouldn't really modify cfg80211-owned data! */ | |
513 | if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL)) | |
514 | bss->cbss.channel = sdata->local->oper_channel; | |
515 | ||
516 | ieee80211_rx_bss_put(sdata->local, bss); | |
517 | exit: | |
518 | ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; | |
519 | ieee80211_wake_queues_by_reason(&sdata->local->hw, | |
520 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
521 | } | |
522 | ||
523 | static void ieee80211_chswitch_timer(unsigned long data) | |
524 | { | |
525 | struct ieee80211_sub_if_data *sdata = | |
526 | (struct ieee80211_sub_if_data *) data; | |
527 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
528 | ||
5bb644a0 JB |
529 | if (sdata->local->quiescing) { |
530 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
531 | return; | |
532 | } | |
533 | ||
cc32abd4 JB |
534 | queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work); |
535 | } | |
536 | ||
537 | void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, | |
538 | struct ieee80211_channel_sw_ie *sw_elem, | |
539 | struct ieee80211_bss *bss) | |
540 | { | |
541 | struct ieee80211_channel *new_ch; | |
542 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
543 | int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num); | |
544 | ||
545 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATED) | |
546 | return; | |
547 | ||
548 | if (sdata->local->sw_scanning || sdata->local->hw_scanning) | |
549 | return; | |
550 | ||
551 | /* Disregard subsequent beacons if we are already running a timer | |
552 | processing a CSA */ | |
553 | ||
554 | if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) | |
555 | return; | |
556 | ||
557 | new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); | |
558 | if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) | |
559 | return; | |
560 | ||
561 | sdata->local->csa_channel = new_ch; | |
562 | ||
563 | if (sw_elem->count <= 1) { | |
564 | queue_work(sdata->local->hw.workqueue, &ifmgd->chswitch_work); | |
565 | } else { | |
566 | ieee80211_stop_queues_by_reason(&sdata->local->hw, | |
567 | IEEE80211_QUEUE_STOP_REASON_CSA); | |
568 | ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; | |
569 | mod_timer(&ifmgd->chswitch_timer, | |
570 | jiffies + | |
571 | msecs_to_jiffies(sw_elem->count * | |
572 | bss->cbss.beacon_interval)); | |
573 | } | |
574 | } | |
575 | ||
576 | static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, | |
577 | u16 capab_info, u8 *pwr_constr_elem, | |
578 | u8 pwr_constr_elem_len) | |
579 | { | |
580 | struct ieee80211_conf *conf = &sdata->local->hw.conf; | |
581 | ||
582 | if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT)) | |
583 | return; | |
584 | ||
585 | /* Power constraint IE length should be 1 octet */ | |
586 | if (pwr_constr_elem_len != 1) | |
587 | return; | |
588 | ||
589 | if ((*pwr_constr_elem <= conf->channel->max_power) && | |
590 | (*pwr_constr_elem != sdata->local->power_constr_level)) { | |
591 | sdata->local->power_constr_level = *pwr_constr_elem; | |
592 | ieee80211_hw_config(sdata->local, 0); | |
593 | } | |
594 | } | |
595 | ||
965bedad JB |
596 | /* powersave */ |
597 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
598 | struct ieee80211_sub_if_data *sdata) | |
599 | { | |
600 | struct ieee80211_conf *conf = &local->hw.conf; | |
601 | ||
d5edaedc JB |
602 | /* |
603 | * If we are scanning right now then the parameters will | |
604 | * take effect when scan finishes. | |
605 | */ | |
606 | if (local->hw_scanning || local->sw_scanning) | |
607 | return; | |
608 | ||
965bedad JB |
609 | if (conf->dynamic_ps_timeout > 0 && |
610 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
611 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
612 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
613 | } else { | |
614 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
615 | ieee80211_send_nullfunc(local, sdata, 1); | |
616 | conf->flags |= IEEE80211_CONF_PS; | |
617 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
618 | } | |
619 | } | |
620 | ||
621 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
622 | { | |
623 | struct ieee80211_conf *conf = &local->hw.conf; | |
624 | ||
625 | if (local->ps_sdata) { | |
965bedad JB |
626 | ieee80211_enable_ps(local, local->ps_sdata); |
627 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
628 | conf->flags &= ~IEEE80211_CONF_PS; | |
629 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
630 | del_timer_sync(&local->dynamic_ps_timer); | |
631 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
632 | } | |
633 | } | |
634 | ||
635 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 636 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
637 | { |
638 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
639 | int count = 0; | |
640 | ||
641 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
642 | local->ps_sdata = NULL; | |
643 | return; | |
644 | } | |
645 | ||
646 | list_for_each_entry(sdata, &local->interfaces, list) { | |
647 | if (!netif_running(sdata->dev)) | |
648 | continue; | |
649 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
650 | continue; | |
651 | found = sdata; | |
652 | count++; | |
653 | } | |
654 | ||
43f78531 | 655 | if (count == 1 && found->u.mgd.powersave && |
4e751843 JB |
656 | (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) && |
657 | !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) { | |
10f644a4 JB |
658 | s32 beaconint_us; |
659 | ||
660 | if (latency < 0) | |
661 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
662 | ||
663 | beaconint_us = ieee80211_tu_to_usec( | |
664 | found->vif.bss_conf.beacon_int); | |
665 | ||
04fe2037 | 666 | if (beaconint_us > latency) { |
10f644a4 | 667 | local->ps_sdata = NULL; |
04fe2037 JB |
668 | } else { |
669 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
670 | int maxslp = 1; | |
671 | ||
672 | if (dtimper > 1) | |
673 | maxslp = min_t(int, dtimper, | |
674 | latency / beaconint_us); | |
675 | ||
9ccebe61 | 676 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 677 | local->ps_sdata = found; |
04fe2037 | 678 | } |
10f644a4 | 679 | } else { |
965bedad | 680 | local->ps_sdata = NULL; |
10f644a4 | 681 | } |
965bedad JB |
682 | |
683 | ieee80211_change_ps(local); | |
684 | } | |
685 | ||
686 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
687 | { | |
688 | struct ieee80211_local *local = | |
689 | container_of(work, struct ieee80211_local, | |
690 | dynamic_ps_disable_work); | |
691 | ||
692 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
693 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
694 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
695 | } | |
696 | ||
697 | ieee80211_wake_queues_by_reason(&local->hw, | |
698 | IEEE80211_QUEUE_STOP_REASON_PS); | |
699 | } | |
700 | ||
701 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
702 | { | |
703 | struct ieee80211_local *local = | |
704 | container_of(work, struct ieee80211_local, | |
705 | dynamic_ps_enable_work); | |
706 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
707 | ||
708 | /* can only happen when PS was just disabled anyway */ | |
709 | if (!sdata) | |
710 | return; | |
711 | ||
712 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
713 | return; | |
714 | ||
715 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
716 | ieee80211_send_nullfunc(local, sdata, 1); | |
717 | ||
718 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
719 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
720 | } | |
721 | ||
722 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
723 | { | |
724 | struct ieee80211_local *local = (void *) data; | |
725 | ||
5bb644a0 JB |
726 | if (local->quiescing) |
727 | return; | |
728 | ||
965bedad JB |
729 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); |
730 | } | |
731 | ||
60f8b39c | 732 | /* MLME */ |
f698d856 | 733 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 734 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
735 | u8 *wmm_param, size_t wmm_param_len) |
736 | { | |
f0706e82 JB |
737 | struct ieee80211_tx_queue_params params; |
738 | size_t left; | |
739 | int count; | |
740 | u8 *pos; | |
741 | ||
46900298 | 742 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
743 | return; |
744 | ||
745 | if (!wmm_param) | |
746 | return; | |
747 | ||
f0706e82 JB |
748 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
749 | return; | |
750 | count = wmm_param[6] & 0x0f; | |
46900298 | 751 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 752 | return; |
46900298 | 753 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
754 | |
755 | pos = wmm_param + 8; | |
756 | left = wmm_param_len - 8; | |
757 | ||
758 | memset(¶ms, 0, sizeof(params)); | |
759 | ||
f0706e82 JB |
760 | local->wmm_acm = 0; |
761 | for (; left >= 4; left -= 4, pos += 4) { | |
762 | int aci = (pos[0] >> 5) & 0x03; | |
763 | int acm = (pos[0] >> 4) & 0x01; | |
764 | int queue; | |
765 | ||
766 | switch (aci) { | |
0eeb59fe | 767 | case 1: /* AC_BK */ |
e100bb64 | 768 | queue = 3; |
988c0f72 | 769 | if (acm) |
0eeb59fe | 770 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 771 | break; |
0eeb59fe | 772 | case 2: /* AC_VI */ |
e100bb64 | 773 | queue = 1; |
988c0f72 | 774 | if (acm) |
0eeb59fe | 775 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 776 | break; |
0eeb59fe | 777 | case 3: /* AC_VO */ |
e100bb64 | 778 | queue = 0; |
988c0f72 | 779 | if (acm) |
0eeb59fe | 780 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 781 | break; |
0eeb59fe | 782 | case 0: /* AC_BE */ |
f0706e82 | 783 | default: |
e100bb64 | 784 | queue = 2; |
988c0f72 | 785 | if (acm) |
0eeb59fe | 786 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
787 | break; |
788 | } | |
789 | ||
790 | params.aifs = pos[0] & 0x0f; | |
791 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
792 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 793 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 794 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 795 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 796 | "cWmin=%d cWmax=%d txop=%d\n", |
0bffe40f JB |
797 | wiphy_name(local->hw.wiphy), queue, aci, acm, |
798 | params.aifs, params.cw_min, params.cw_max, params.txop); | |
3330d7be | 799 | #endif |
24487981 | 800 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 801 | printk(KERN_DEBUG "%s: failed to set TX queue " |
0bffe40f JB |
802 | "parameters for queue %d\n", |
803 | wiphy_name(local->hw.wiphy), queue); | |
f0706e82 JB |
804 | } |
805 | } | |
806 | ||
7a5158ef JB |
807 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
808 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 809 | { |
bda3933a | 810 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 811 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 812 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 813 | #endif |
471b3efd | 814 | u32 changed = 0; |
7a5158ef JB |
815 | bool use_protection; |
816 | bool use_short_preamble; | |
817 | bool use_short_slot; | |
818 | ||
819 | if (erp_valid) { | |
820 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
821 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
822 | } else { | |
823 | use_protection = false; | |
824 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
825 | } | |
826 | ||
827 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 828 | |
471b3efd | 829 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 830 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 831 | if (net_ratelimit()) { |
0c68ae26 | 832 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 833 | sdata->dev->name, |
5628221c | 834 | use_protection ? "enabled" : "disabled", |
46900298 | 835 | ifmgd->bssid); |
5628221c | 836 | } |
f4ea83dd | 837 | #endif |
471b3efd JB |
838 | bss_conf->use_cts_prot = use_protection; |
839 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 840 | } |
7e9ed188 | 841 | |
d43c7b37 | 842 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 843 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
844 | if (net_ratelimit()) { |
845 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 846 | " (BSSID=%pM)\n", |
471b3efd | 847 | sdata->dev->name, |
d43c7b37 | 848 | use_short_preamble ? "short" : "long", |
46900298 | 849 | ifmgd->bssid); |
7e9ed188 | 850 | } |
f4ea83dd | 851 | #endif |
d43c7b37 | 852 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 853 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 854 | } |
d9430a32 | 855 | |
7a5158ef JB |
856 | if (use_short_slot != bss_conf->use_short_slot) { |
857 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
858 | if (net_ratelimit()) { | |
391429c1 CL |
859 | printk(KERN_DEBUG "%s: switched to %s slot time" |
860 | " (BSSID=%pM)\n", | |
7a5158ef JB |
861 | sdata->dev->name, |
862 | use_short_slot ? "short" : "long", | |
46900298 | 863 | ifmgd->bssid); |
7a5158ef JB |
864 | } |
865 | #endif | |
866 | bss_conf->use_short_slot = use_short_slot; | |
867 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
868 | } |
869 | ||
870 | return changed; | |
871 | } | |
872 | ||
f698d856 | 873 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 874 | u32 bss_info_changed) |
f0706e82 | 875 | { |
46900298 | 876 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 877 | struct ieee80211_local *local = sdata->local; |
38668c05 | 878 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 879 | |
c2b13452 | 880 | struct ieee80211_bss *bss; |
d6f2da5b | 881 | |
ae5eb026 | 882 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 883 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 884 | |
46900298 | 885 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 886 | conf->channel->center_freq, |
46900298 | 887 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
888 | if (bss) { |
889 | /* set timing information */ | |
00d3f14c JB |
890 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
891 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 892 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 893 | |
57c4d7b4 | 894 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 895 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 896 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 897 | |
04de8381 KV |
898 | cfg80211_hold_bss(&bss->cbss); |
899 | ||
9ac19a90 | 900 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
901 | } |
902 | ||
46900298 JB |
903 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
904 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
9306102e | 905 | |
46900298 | 906 | ifmgd->last_probe = jiffies; |
9ac19a90 | 907 | ieee80211_led_assoc(local, 1); |
9306102e | 908 | |
bda3933a | 909 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
910 | /* |
911 | * For now just always ask the driver to update the basic rateset | |
912 | * when we have associated, we aren't checking whether it actually | |
913 | * changed or not. | |
914 | */ | |
ae5eb026 | 915 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
9cef8737 JB |
916 | |
917 | /* And the BSSID changed - we're associated now */ | |
918 | bss_info_changed |= BSS_CHANGED_BSSID; | |
919 | ||
ae5eb026 | 920 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); |
f0706e82 | 921 | |
965bedad | 922 | /* will be same as sdata */ |
04fe2037 JB |
923 | if (local->ps_sdata) { |
924 | mutex_lock(&local->iflist_mtx); | |
925 | ieee80211_recalc_ps(local, -1); | |
926 | mutex_unlock(&local->iflist_mtx); | |
927 | } | |
e0cb686f | 928 | |
9ac19a90 JB |
929 | netif_tx_start_all_queues(sdata->dev); |
930 | netif_carrier_on(sdata->dev); | |
f0706e82 JB |
931 | } |
932 | ||
46900298 | 933 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 934 | { |
46900298 | 935 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 936 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
937 | |
938 | ifmgd->direct_probe_tries++; | |
939 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 940 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
941 | sdata->dev->name, ifmgd->bssid); |
942 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 943 | ieee80211_recalc_idle(local); |
e6d6e342 JB |
944 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid, |
945 | GFP_KERNEL); | |
7a947080 VT |
946 | |
947 | /* | |
948 | * Most likely AP is not in the range so remove the | |
949 | * bss information associated to the AP | |
950 | */ | |
46900298 | 951 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 952 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 953 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
954 | |
955 | /* | |
956 | * We might have a pending scan which had no chance to run yet | |
957 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
958 | * Hence, queue the STAs work again | |
959 | */ | |
960 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
961 | return; |
962 | } | |
f0706e82 | 963 | |
0c68ae26 | 964 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
965 | sdata->dev->name, ifmgd->bssid, |
966 | ifmgd->direct_probe_tries); | |
f0706e82 | 967 | |
46900298 | 968 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 969 | |
9ac19a90 JB |
970 | /* Direct probe is sent to broadcast address as some APs |
971 | * will not answer to direct packet in unassociated state. | |
972 | */ | |
973 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 974 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 975 | |
46900298 | 976 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 977 | } |
f0706e82 | 978 | |
9ac19a90 | 979 | |
46900298 | 980 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 981 | { |
46900298 | 982 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 983 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
984 | |
985 | ifmgd->auth_tries++; | |
986 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 987 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 988 | " timed out\n", |
46900298 JB |
989 | sdata->dev->name, ifmgd->bssid); |
990 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 991 | ieee80211_recalc_idle(local); |
e6d6e342 JB |
992 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid, |
993 | GFP_KERNEL); | |
46900298 | 994 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 995 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 996 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
997 | |
998 | /* | |
999 | * We might have a pending scan which had no chance to run yet | |
1000 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
1001 | * Hence, queue the STAs work again | |
1002 | */ | |
1003 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1004 | return; |
1005 | } | |
f0706e82 | 1006 | |
46900298 | 1007 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 1008 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 1009 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 1010 | |
ab1faead JB |
1011 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ifmgd->sme_auth_ie, |
1012 | ifmgd->sme_auth_ie_len, ifmgd->bssid, 0); | |
46900298 | 1013 | ifmgd->auth_transaction = 2; |
9ac19a90 | 1014 | |
46900298 | 1015 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
1016 | } |
1017 | ||
5925d976 VN |
1018 | /* |
1019 | * The disassoc 'reason' argument can be either our own reason | |
1020 | * if self disconnected or a reason code from the AP. | |
1021 | */ | |
aa458d17 | 1022 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
1023 | bool deauth, bool self_disconnected, |
1024 | u16 reason) | |
aa458d17 | 1025 | { |
46900298 | 1026 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 1027 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
1028 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
1029 | struct ieee80211_bss *bss; | |
aa458d17 | 1030 | struct sta_info *sta; |
e0cb686f | 1031 | u32 changed = 0, config_changed = 0; |
aa458d17 | 1032 | |
aa458d17 | 1033 | if (deauth) { |
46900298 JB |
1034 | ifmgd->direct_probe_tries = 0; |
1035 | ifmgd->auth_tries = 0; | |
aa458d17 | 1036 | } |
46900298 JB |
1037 | ifmgd->assoc_scan_tries = 0; |
1038 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1039 | |
24e64622 | 1040 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1041 | netif_carrier_off(sdata->dev); |
1042 | ||
1fa6f4af JB |
1043 | rcu_read_lock(); |
1044 | sta = sta_info_get(local, ifmgd->bssid); | |
1045 | if (sta) | |
1046 | ieee80211_sta_tear_down_BA_sessions(sta); | |
1047 | rcu_read_unlock(); | |
aa458d17 | 1048 | |
04de8381 KV |
1049 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1050 | conf->channel->center_freq, | |
1051 | ifmgd->ssid, ifmgd->ssid_len); | |
1052 | ||
1053 | if (bss) { | |
1054 | cfg80211_unhold_bss(&bss->cbss); | |
1055 | ieee80211_rx_bss_put(local, bss); | |
1056 | } | |
1057 | ||
aa458d17 TW |
1058 | if (self_disconnected) { |
1059 | if (deauth) | |
ef422bc0 JB |
1060 | ieee80211_send_deauth_disassoc(sdata, |
1061 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1062 | else |
ef422bc0 JB |
1063 | ieee80211_send_deauth_disassoc(sdata, |
1064 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1065 | } |
1066 | ||
46900298 | 1067 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1068 | changed |= ieee80211_reset_erp_info(sdata); |
1069 | ||
f5e5bf25 | 1070 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1071 | changed |= BSS_CHANGED_ASSOC; |
1072 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1073 | |
7a947080 | 1074 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1075 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1076 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1077 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1078 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1079 | } |
aa458d17 | 1080 | |
aa837e1d JB |
1081 | ieee80211_set_wmm_default(sdata); |
1082 | ||
5cff20e6 JB |
1083 | ieee80211_recalc_idle(local); |
1084 | ||
4797938c | 1085 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1086 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1087 | |
413ad50a JB |
1088 | /* on the next assoc, re-program HT parameters */ |
1089 | sdata->ht_opmode_valid = false; | |
1090 | ||
a8302de9 VT |
1091 | local->power_constr_level = 0; |
1092 | ||
520eb820 KV |
1093 | del_timer_sync(&local->dynamic_ps_timer); |
1094 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1095 | ||
e0cb686f KV |
1096 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1097 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1098 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1099 | } | |
ae5eb026 | 1100 | |
e0cb686f | 1101 | ieee80211_hw_config(local, config_changed); |
9cef8737 JB |
1102 | |
1103 | /* And the BSSID changed -- not very interesting here */ | |
1104 | changed |= BSS_CHANGED_BSSID; | |
ae5eb026 | 1105 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1106 | |
1107 | rcu_read_lock(); | |
1108 | ||
46900298 | 1109 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1110 | if (!sta) { |
1111 | rcu_read_unlock(); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | sta_info_unlink(&sta); | |
1116 | ||
1117 | rcu_read_unlock(); | |
1118 | ||
1119 | sta_info_destroy(sta); | |
aa458d17 | 1120 | } |
f0706e82 | 1121 | |
46900298 | 1122 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1123 | { |
46900298 | 1124 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1125 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1126 | |
1127 | ifmgd->assoc_tries++; | |
1128 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1129 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1130 | " timed out\n", |
46900298 JB |
1131 | sdata->dev->name, ifmgd->bssid); |
1132 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1133 | ieee80211_recalc_idle(local); |
e6d6e342 JB |
1134 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid, |
1135 | GFP_KERNEL); | |
46900298 | 1136 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1137 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1138 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1139 | /* |
1140 | * We might have a pending scan which had no chance to run yet | |
1141 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1142 | * Hence, queue the STAs work again | |
1143 | */ | |
1144 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1145 | return; |
1146 | } | |
1147 | ||
46900298 | 1148 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1149 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 | 1150 | sdata->dev->name, ifmgd->bssid); |
46900298 | 1151 | ieee80211_send_assoc(sdata); |
f0706e82 | 1152 | |
46900298 | 1153 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1154 | } |
1155 | ||
3cf335d5 KV |
1156 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1157 | struct ieee80211_hdr *hdr) | |
1158 | { | |
1159 | /* | |
1160 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1161 | * from AP because we know that the connection is working both ways | |
1162 | * at that time. But multicast frames (and hence also beacons) must | |
1163 | * be ignored here, because we need to trigger the timer during | |
1164 | * data idle periods for sending the periodical probe request to | |
1165 | * the AP. | |
1166 | */ | |
1167 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1168 | mod_timer(&sdata->u.mgd.timer, | |
1169 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1170 | } | |
f0706e82 | 1171 | |
04de8381 KV |
1172 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1173 | { | |
1174 | struct ieee80211_sub_if_data *sdata = | |
1175 | container_of(work, struct ieee80211_sub_if_data, | |
1176 | u.mgd.beacon_loss_work); | |
1177 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1178 | ||
34bfc411 JB |
1179 | /* |
1180 | * The driver has already reported this event and we have | |
1181 | * already sent a probe request. Maybe the AP died and the | |
1182 | * driver keeps reporting until we disassociate... We have | |
1183 | * to ignore that because otherwise we would continually | |
1184 | * reset the timer and never check whether we received a | |
1185 | * probe response! | |
1186 | */ | |
1187 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1188 | return; | |
1189 | ||
a860402d MB |
1190 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1191 | if (net_ratelimit()) { | |
1192 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1193 | "- sending probe request\n", sdata->dev->name, | |
1194 | sdata->u.mgd.bssid); | |
1195 | } | |
1196 | #endif | |
04de8381 KV |
1197 | |
1198 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
4e751843 JB |
1199 | |
1200 | mutex_lock(&sdata->local->iflist_mtx); | |
1201 | ieee80211_recalc_ps(sdata->local, -1); | |
1202 | mutex_unlock(&sdata->local->iflist_mtx); | |
1203 | ||
04de8381 KV |
1204 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
1205 | ifmgd->ssid_len, NULL, 0); | |
1206 | ||
e0502de6 | 1207 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
04de8381 KV |
1208 | } |
1209 | ||
1210 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1211 | { | |
1212 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1213 | ||
1214 | queue_work(sdata->local->hw.workqueue, | |
1215 | &sdata->u.mgd.beacon_loss_work); | |
1216 | } | |
1217 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1218 | ||
46900298 | 1219 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1220 | { |
46900298 | 1221 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1222 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1223 | struct sta_info *sta; |
4e751843 | 1224 | unsigned long last_rx; |
15b7b062 | 1225 | bool disassoc = false; |
f0706e82 JB |
1226 | |
1227 | /* TODO: start monitoring current AP signal quality and number of | |
1228 | * missed beacons. Scan other channels every now and then and search | |
1229 | * for better APs. */ | |
1230 | /* TODO: remove expired BSSes */ | |
1231 | ||
46900298 | 1232 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1233 | |
d0709a65 JB |
1234 | rcu_read_lock(); |
1235 | ||
46900298 | 1236 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1237 | if (!sta) { |
0c68ae26 | 1238 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1239 | sdata->dev->name, ifmgd->bssid); |
15b7b062 | 1240 | disassoc = true; |
4e751843 JB |
1241 | rcu_read_unlock(); |
1242 | goto out; | |
15b7b062 KV |
1243 | } |
1244 | ||
4e751843 JB |
1245 | last_rx = sta->last_rx; |
1246 | rcu_read_unlock(); | |
1247 | ||
15b7b062 | 1248 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && |
4e751843 | 1249 | time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) { |
15b7b062 KV |
1250 | printk(KERN_DEBUG "%s: no probe response from AP %pM " |
1251 | "- disassociating\n", | |
1252 | sdata->dev->name, ifmgd->bssid); | |
1253 | disassoc = true; | |
1254 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
4e751843 | 1255 | goto out; |
15b7b062 KV |
1256 | } |
1257 | ||
04de8381 KV |
1258 | /* |
1259 | * Beacon filtering is only enabled with power save and then the | |
1260 | * stack should not check for beacon loss. | |
1261 | */ | |
1262 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1263 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1264 | time_after(jiffies, | |
15b7b062 | 1265 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1266 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1267 | if (net_ratelimit()) { | |
1268 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1269 | "- sending probe request\n", | |
1270 | sdata->dev->name, ifmgd->bssid); | |
1271 | } | |
1272 | #endif | |
15b7b062 | 1273 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
4e751843 JB |
1274 | mutex_lock(&local->iflist_mtx); |
1275 | ieee80211_recalc_ps(local, -1); | |
1276 | mutex_unlock(&local->iflist_mtx); | |
15b7b062 KV |
1277 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
1278 | ifmgd->ssid_len, NULL, 0); | |
4ef699fb | 1279 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
4e751843 | 1280 | goto out; |
15b7b062 KV |
1281 | } |
1282 | ||
4e751843 | 1283 | if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) { |
15b7b062 | 1284 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
4e751843 JB |
1285 | mutex_lock(&local->iflist_mtx); |
1286 | ieee80211_recalc_ps(local, -1); | |
1287 | mutex_unlock(&local->iflist_mtx); | |
15b7b062 KV |
1288 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, |
1289 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1290 | } |
d0709a65 | 1291 | |
4e751843 | 1292 | out: |
4ef699fb JB |
1293 | if (!disassoc) |
1294 | mod_timer(&ifmgd->timer, | |
1295 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
4e751843 | 1296 | else |
46900298 | 1297 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1298 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
f0706e82 JB |
1299 | } |
1300 | ||
1301 | ||
46900298 | 1302 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1303 | { |
46900298 JB |
1304 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1305 | ||
f698d856 | 1306 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1307 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
ab1faead JB |
1308 | /* Wait for SME to request association */ |
1309 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1310 | ieee80211_recalc_idle(sdata->local); | |
f0706e82 JB |
1311 | } |
1312 | ||
1313 | ||
f698d856 | 1314 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1315 | struct ieee80211_mgmt *mgmt, |
1316 | size_t len) | |
1317 | { | |
1318 | u8 *pos; | |
1319 | struct ieee802_11_elems elems; | |
1320 | ||
f0706e82 | 1321 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1322 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1323 | if (!elems.challenge) |
f0706e82 | 1324 | return; |
46900298 JB |
1325 | ieee80211_send_auth(sdata, 3, sdata->u.mgd.auth_alg, |
1326 | elems.challenge - 2, elems.challenge_len + 2, | |
1327 | sdata->u.mgd.bssid, 1); | |
1328 | sdata->u.mgd.auth_transaction = 4; | |
fe3d2c3f JB |
1329 | } |
1330 | ||
f698d856 | 1331 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1332 | struct ieee80211_mgmt *mgmt, |
1333 | size_t len) | |
1334 | { | |
46900298 | 1335 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1336 | u16 auth_alg, auth_transaction, status_code; |
1337 | ||
46900298 | 1338 | if (ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE) |
f0706e82 | 1339 | return; |
f0706e82 | 1340 | |
f4ea83dd | 1341 | if (len < 24 + 6) |
f0706e82 | 1342 | return; |
f0706e82 | 1343 | |
46900298 | 1344 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1345 | return; |
f0706e82 | 1346 | |
46900298 | 1347 | if (memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1348 | return; |
f0706e82 JB |
1349 | |
1350 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1351 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1352 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1353 | ||
46900298 JB |
1354 | if (auth_alg != ifmgd->auth_alg || |
1355 | auth_transaction != ifmgd->auth_transaction) | |
f0706e82 | 1356 | return; |
f0706e82 JB |
1357 | |
1358 | if (status_code != WLAN_STATUS_SUCCESS) { | |
0575606b JB |
1359 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len, |
1360 | GFP_KERNEL); | |
1361 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1362 | ieee80211_recalc_idle(sdata->local); | |
f0706e82 JB |
1363 | return; |
1364 | } | |
1365 | ||
46900298 | 1366 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1367 | case WLAN_AUTH_OPEN: |
1368 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1369 | case WLAN_AUTH_FT: |
46900298 | 1370 | ieee80211_auth_completed(sdata); |
e6d6e342 JB |
1371 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len, |
1372 | GFP_KERNEL); | |
f0706e82 JB |
1373 | break; |
1374 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1375 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1376 | ieee80211_auth_completed(sdata); |
e6d6e342 JB |
1377 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len, |
1378 | GFP_KERNEL); | |
6039f6d2 | 1379 | } else |
46900298 | 1380 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1381 | break; |
1382 | } | |
1383 | } | |
1384 | ||
1385 | ||
f698d856 | 1386 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1387 | struct ieee80211_mgmt *mgmt, |
1388 | size_t len) | |
1389 | { | |
46900298 | 1390 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1391 | u16 reason_code; |
1392 | ||
f4ea83dd | 1393 | if (len < 24 + 2) |
f0706e82 | 1394 | return; |
f0706e82 | 1395 | |
46900298 | 1396 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1397 | return; |
f0706e82 JB |
1398 | |
1399 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1400 | ||
46900298 | 1401 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1402 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1403 | sdata->dev->name, reason_code); | |
f0706e82 | 1404 | |
46900298 JB |
1405 | ieee80211_set_disassoc(sdata, true, false, 0); |
1406 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
e6d6e342 | 1407 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL); |
f0706e82 JB |
1408 | } |
1409 | ||
1410 | ||
f698d856 | 1411 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1412 | struct ieee80211_mgmt *mgmt, |
1413 | size_t len) | |
1414 | { | |
46900298 | 1415 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1416 | u16 reason_code; |
1417 | ||
f4ea83dd | 1418 | if (len < 24 + 2) |
f0706e82 | 1419 | return; |
f0706e82 | 1420 | |
46900298 | 1421 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1422 | return; |
f0706e82 JB |
1423 | |
1424 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1425 | ||
46900298 | 1426 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1427 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1428 | sdata->dev->name, reason_code); | |
f0706e82 | 1429 | |
46900298 | 1430 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
e6d6e342 | 1431 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL); |
f0706e82 JB |
1432 | } |
1433 | ||
1434 | ||
471b3efd | 1435 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1436 | struct ieee80211_mgmt *mgmt, |
1437 | size_t len, | |
1438 | int reassoc) | |
1439 | { | |
46900298 | 1440 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1441 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1442 | struct ieee80211_supported_band *sband; |
f0706e82 | 1443 | struct sta_info *sta; |
881d948c | 1444 | u32 rates, basic_rates; |
f0706e82 JB |
1445 | u16 capab_info, status_code, aid; |
1446 | struct ieee802_11_elems elems; | |
bda3933a | 1447 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1448 | u8 *pos; |
ae5eb026 | 1449 | u32 changed = 0; |
f0706e82 | 1450 | int i, j; |
ddf4ac53 | 1451 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1452 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1453 | |
1454 | /* AssocResp and ReassocResp have identical structure, so process both | |
1455 | * of them in this function. */ | |
1456 | ||
46900298 | 1457 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1458 | return; |
f0706e82 | 1459 | |
f4ea83dd | 1460 | if (len < 24 + 6) |
f0706e82 | 1461 | return; |
f0706e82 | 1462 | |
46900298 | 1463 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1464 | return; |
f0706e82 JB |
1465 | |
1466 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1467 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1468 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1469 | |
0c68ae26 | 1470 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1471 | "status=%d aid=%d)\n", |
0c68ae26 | 1472 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1473 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1474 | |
63a5ab82 JM |
1475 | pos = mgmt->u.assoc_resp.variable; |
1476 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1477 | ||
1478 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1479 | elems.timeout_int && elems.timeout_int_len == 5 && |
1480 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1481 | u32 tu, ms; |
f797eb7e | 1482 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1483 | ms = tu * 1024 / 1000; |
1484 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1485 | "comeback duration %u TU (%u ms)\n", | |
1486 | sdata->dev->name, tu, ms); | |
1487 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1488 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1489 | jiffies + msecs_to_jiffies(ms)); |
1490 | return; | |
1491 | } | |
1492 | ||
f0706e82 JB |
1493 | if (status_code != WLAN_STATUS_SUCCESS) { |
1494 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1495 | sdata->dev->name, status_code); |
8a69aa93 DD |
1496 | /* if this was a reassociation, ensure we try a "full" |
1497 | * association next time. This works around some broken APs | |
1498 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1499 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
e6d6e342 JB |
1500 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, |
1501 | GFP_KERNEL); | |
ab1faead JB |
1502 | /* Wait for SME to decide what to do next */ |
1503 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
1504 | ieee80211_recalc_idle(local); | |
f0706e82 JB |
1505 | return; |
1506 | } | |
1507 | ||
1dd84aa2 JB |
1508 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1509 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1510 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1511 | aid &= ~(BIT(15) | BIT(14)); |
1512 | ||
f0706e82 JB |
1513 | if (!elems.supp_rates) { |
1514 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1515 | sdata->dev->name); |
f0706e82 JB |
1516 | return; |
1517 | } | |
1518 | ||
f698d856 | 1519 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1520 | ifmgd->aid = aid; |
1521 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1522 | |
46900298 JB |
1523 | kfree(ifmgd->assocresp_ies); |
1524 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1525 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1526 | if (ifmgd->assocresp_ies) | |
1527 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1528 | |
d0709a65 JB |
1529 | rcu_read_lock(); |
1530 | ||
f0706e82 | 1531 | /* Add STA entry for the AP */ |
46900298 | 1532 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1533 | if (!sta) { |
ddf4ac53 | 1534 | newsta = true; |
d0709a65 | 1535 | |
46900298 | 1536 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1537 | if (!sta) { |
1538 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1539 | " the AP\n", sdata->dev->name); |
d0709a65 | 1540 | rcu_read_unlock(); |
f0706e82 JB |
1541 | return; |
1542 | } | |
f709fc69 | 1543 | |
60f8b39c JB |
1544 | /* update new sta with its last rx activity */ |
1545 | sta->last_rx = jiffies; | |
f709fc69 | 1546 | } |
f709fc69 | 1547 | |
60f8b39c JB |
1548 | /* |
1549 | * FIXME: Do we really need to update the sta_info's information here? | |
1550 | * We already know about the AP (we found it in our list) so it | |
1551 | * should already be filled with the right info, no? | |
1552 | * As is stands, all this is racy because typically we assume | |
1553 | * the information that is filled in here (except flags) doesn't | |
1554 | * change while a STA structure is alive. As such, it should move | |
1555 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1556 | */ | |
f709fc69 | 1557 | |
3f77316c JM |
1558 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP); |
1559 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1560 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
05e5e883 | 1561 | |
60f8b39c JB |
1562 | rates = 0; |
1563 | basic_rates = 0; | |
1564 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1565 | |
60f8b39c JB |
1566 | for (i = 0; i < elems.supp_rates_len; i++) { |
1567 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1568 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1569 | |
60f8b39c JB |
1570 | if (rate > 110) |
1571 | have_higher_than_11mbit = true; | |
1572 | ||
1573 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1574 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1575 | rates |= BIT(j); |
d61272cb TW |
1576 | if (is_basic) |
1577 | basic_rates |= BIT(j); | |
1578 | break; | |
1579 | } | |
f709fc69 | 1580 | } |
f709fc69 LCC |
1581 | } |
1582 | ||
60f8b39c JB |
1583 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1584 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1585 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1586 | |
60f8b39c JB |
1587 | if (rate > 110) |
1588 | have_higher_than_11mbit = true; | |
f0706e82 | 1589 | |
60f8b39c | 1590 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1591 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1592 | rates |= BIT(j); |
d61272cb TW |
1593 | if (is_basic) |
1594 | basic_rates |= BIT(j); | |
1595 | break; | |
1596 | } | |
60f8b39c | 1597 | } |
1ebebea8 | 1598 | } |
f0706e82 | 1599 | |
323ce79a | 1600 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1601 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1602 | |
1603 | /* cf. IEEE 802.11 9.2.12 */ | |
1604 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1605 | have_higher_than_11mbit) | |
1606 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1607 | else | |
1608 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1609 | |
ab1faead | 1610 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 | 1611 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1612 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1613 | |
1614 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1615 | |
4b7679a5 | 1616 | rate_control_rate_init(sta); |
f0706e82 | 1617 | |
46900298 | 1618 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1619 | set_sta_flags(sta, WLAN_STA_MFP); |
1620 | ||
ddf4ac53 | 1621 | if (elems.wmm_param) |
60f8b39c | 1622 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1623 | |
1624 | if (newsta) { | |
1625 | int err = sta_info_insert(sta); | |
1626 | if (err) { | |
1627 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1628 | " the AP (error %d)\n", sdata->dev->name, err); | |
1629 | rcu_read_unlock(); | |
1630 | return; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | rcu_read_unlock(); | |
1635 | ||
1636 | if (elems.wmm_param) | |
46900298 | 1637 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1638 | elems.wmm_param_len); |
aa837e1d JB |
1639 | else |
1640 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1641 | |
ae5eb026 | 1642 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 | 1643 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
ab1faead | 1644 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) |
ae5eb026 JB |
1645 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1646 | ap_ht_cap_flags); | |
1647 | ||
60f8b39c JB |
1648 | /* set AID and assoc capability, |
1649 | * ieee80211_set_associated() will tell the driver */ | |
1650 | bss_conf->aid = aid; | |
1651 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1652 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1653 | |
15b7b062 KV |
1654 | /* |
1655 | * initialise the time of last beacon to be the association time, | |
1656 | * otherwise beacon loss check will trigger immediately | |
1657 | */ | |
1658 | ifmgd->last_beacon = jiffies; | |
1659 | ||
46900298 | 1660 | ieee80211_associated(sdata); |
e6d6e342 | 1661 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len, GFP_KERNEL); |
f0706e82 JB |
1662 | } |
1663 | ||
1664 | ||
98c8fccf JB |
1665 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1666 | struct ieee80211_mgmt *mgmt, | |
1667 | size_t len, | |
1668 | struct ieee80211_rx_status *rx_status, | |
1669 | struct ieee802_11_elems *elems, | |
1670 | bool beacon) | |
1671 | { | |
1672 | struct ieee80211_local *local = sdata->local; | |
1673 | int freq; | |
c2b13452 | 1674 | struct ieee80211_bss *bss; |
98c8fccf | 1675 | struct ieee80211_channel *channel; |
98c8fccf JB |
1676 | |
1677 | if (elems->ds_params && elems->ds_params_len == 1) | |
1678 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1679 | else | |
1680 | freq = rx_status->freq; | |
1681 | ||
1682 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1683 | ||
1684 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1685 | return; | |
1686 | ||
98c8fccf | 1687 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1688 | channel, beacon); |
98c8fccf JB |
1689 | if (!bss) |
1690 | return; | |
1691 | ||
c481ec97 | 1692 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1693 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1694 | struct ieee80211_channel_sw_ie *sw_elem = |
1695 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
cc32abd4 | 1696 | ieee80211_sta_process_chanswitch(sdata, sw_elem, bss); |
c481ec97 S |
1697 | } |
1698 | ||
3e122be0 | 1699 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1700 | } |
1701 | ||
1702 | ||
f698d856 | 1703 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1704 | struct ieee80211_mgmt *mgmt, |
1705 | size_t len, | |
1706 | struct ieee80211_rx_status *rx_status) | |
1707 | { | |
15b7b062 | 1708 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1709 | size_t baselen; |
1710 | struct ieee802_11_elems elems; | |
1711 | ||
15b7b062 KV |
1712 | ifmgd = &sdata->u.mgd; |
1713 | ||
8e7cdbb6 TW |
1714 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1715 | return; /* ignore ProbeResp to foreign address */ | |
1716 | ||
ae6a44e3 EK |
1717 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1718 | if (baselen > len) | |
1719 | return; | |
1720 | ||
1721 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1722 | &elems); | |
1723 | ||
98c8fccf | 1724 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1725 | |
1726 | /* direct probe may be part of the association flow */ | |
16cf438a | 1727 | if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
9859b81e RR |
1728 | printk(KERN_DEBUG "%s direct probe responded\n", |
1729 | sdata->dev->name); | |
46900298 | 1730 | ieee80211_authenticate(sdata); |
9859b81e | 1731 | } |
15b7b062 | 1732 | |
4e751843 | 1733 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
15b7b062 | 1734 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
4e751843 JB |
1735 | mutex_lock(&sdata->local->iflist_mtx); |
1736 | ieee80211_recalc_ps(sdata->local, -1); | |
1737 | mutex_unlock(&sdata->local->iflist_mtx); | |
1738 | } | |
f0706e82 JB |
1739 | } |
1740 | ||
d91f36db JB |
1741 | /* |
1742 | * This is the canonical list of information elements we care about, | |
1743 | * the filter code also gives us all changes to the Microsoft OUI | |
1744 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1745 | * | |
1746 | * We implement beacon filtering in software since that means we can | |
1747 | * avoid processing the frame here and in cfg80211, and userspace | |
1748 | * will not be able to tell whether the hardware supports it or not. | |
1749 | * | |
1750 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1751 | * add items it requires. It also needs to be able to tell us to | |
1752 | * look out for other vendor IEs. | |
1753 | */ | |
1754 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1755 | (1ULL << WLAN_EID_COUNTRY) | |
1756 | (1ULL << WLAN_EID_ERP_INFO) | | |
1757 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1758 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1759 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1760 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1761 | |
f698d856 | 1762 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1763 | struct ieee80211_mgmt *mgmt, |
1764 | size_t len, | |
1765 | struct ieee80211_rx_status *rx_status) | |
1766 | { | |
d91f36db | 1767 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1768 | size_t baselen; |
1769 | struct ieee802_11_elems elems; | |
f698d856 | 1770 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1771 | u32 changed = 0; |
d91f36db | 1772 | bool erp_valid, directed_tim = false; |
7a5158ef | 1773 | u8 erp_value = 0; |
d91f36db | 1774 | u32 ncrc; |
f0706e82 | 1775 | |
ae6a44e3 EK |
1776 | /* Process beacon from the current BSS */ |
1777 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1778 | if (baselen > len) | |
1779 | return; | |
1780 | ||
d91f36db | 1781 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1782 | return; |
f0706e82 | 1783 | |
46900298 JB |
1784 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1785 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1786 | return; |
1787 | ||
92778180 JM |
1788 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) { |
1789 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1790 | if (net_ratelimit()) { | |
1791 | printk(KERN_DEBUG "%s: cancelling probereq poll due " | |
1792 | "to a received beacon\n", sdata->dev->name); | |
1793 | } | |
1794 | #endif | |
1795 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
4e751843 JB |
1796 | mutex_lock(&local->iflist_mtx); |
1797 | ieee80211_recalc_ps(local, -1); | |
1798 | mutex_unlock(&local->iflist_mtx); | |
92778180 JM |
1799 | } |
1800 | ||
d91f36db JB |
1801 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1802 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1803 | len - baselen, &elems, | |
1804 | care_about_ies, ncrc); | |
1805 | ||
1806 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1807 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1808 | ifmgd->aid); | |
d91f36db | 1809 | |
30196673 JM |
1810 | if (ncrc != ifmgd->beacon_crc) { |
1811 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, | |
1812 | true); | |
d91f36db | 1813 | |
30196673 JM |
1814 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
1815 | elems.wmm_param_len); | |
1816 | } | |
fe3fa827 | 1817 | |
25c9c875 | 1818 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1819 | if (directed_tim) { |
572e0012 KV |
1820 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1821 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1822 | ieee80211_hw_config(local, | |
1823 | IEEE80211_CONF_CHANGE_PS); | |
1824 | ieee80211_send_nullfunc(local, sdata, 0); | |
1825 | } else { | |
1826 | local->pspolling = true; | |
1827 | ||
1828 | /* | |
1829 | * Here is assumed that the driver will be | |
1830 | * able to send ps-poll frame and receive a | |
1831 | * response even though power save mode is | |
1832 | * enabled, but some drivers might require | |
1833 | * to disable power save here. This needs | |
1834 | * to be investigated. | |
1835 | */ | |
1836 | ieee80211_send_pspoll(local, sdata); | |
1837 | } | |
a97b77b9 VN |
1838 | } |
1839 | } | |
7a5158ef | 1840 | |
30196673 JM |
1841 | if (ncrc == ifmgd->beacon_crc) |
1842 | return; | |
1843 | ifmgd->beacon_crc = ncrc; | |
1844 | ||
7a5158ef JB |
1845 | if (elems.erp_info && elems.erp_info_len >= 1) { |
1846 | erp_valid = true; | |
1847 | erp_value = elems.erp_info[0]; | |
1848 | } else { | |
1849 | erp_valid = false; | |
50c4afb9 | 1850 | } |
7a5158ef JB |
1851 | changed |= ieee80211_handle_bss_capability(sdata, |
1852 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1853 | erp_valid, erp_value); | |
f0706e82 | 1854 | |
d3c990fb | 1855 | |
53d6f81c | 1856 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
ab1faead | 1857 | !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) { |
ae5eb026 JB |
1858 | struct sta_info *sta; |
1859 | struct ieee80211_supported_band *sband; | |
1860 | u16 ap_ht_cap_flags; | |
1861 | ||
1862 | rcu_read_lock(); | |
1863 | ||
46900298 | 1864 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1865 | if (!sta) { |
1866 | rcu_read_unlock(); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1871 | ||
1872 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1873 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1874 | ||
1875 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1876 | ||
1877 | rcu_read_unlock(); | |
1878 | ||
1879 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1880 | ap_ht_cap_flags); | |
d3c990fb RR |
1881 | } |
1882 | ||
3f2355cb LR |
1883 | if (elems.country_elem) { |
1884 | /* Note we are only reviewing this on beacons | |
1885 | * for the BSSID we are associated to */ | |
1886 | regulatory_hint_11d(local->hw.wiphy, | |
1887 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1888 | |
1889 | /* TODO: IBSS also needs this */ | |
1890 | if (elems.pwr_constr_elem) | |
1891 | ieee80211_handle_pwr_constr(sdata, | |
1892 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1893 | elems.pwr_constr_elem, | |
1894 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1895 | } |
1896 | ||
471b3efd | 1897 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1898 | } |
1899 | ||
46900298 | 1900 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
f1d58c25 | 1901 | struct sk_buff *skb) |
f0706e82 | 1902 | { |
f698d856 | 1903 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1904 | struct ieee80211_mgmt *mgmt; |
1905 | u16 fc; | |
1906 | ||
1907 | if (skb->len < 24) | |
46900298 | 1908 | return RX_DROP_MONITOR; |
f0706e82 JB |
1909 | |
1910 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1911 | fc = le16_to_cpu(mgmt->frame_control); | |
1912 | ||
1913 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1914 | case IEEE80211_STYPE_PROBE_REQ: | |
1915 | case IEEE80211_STYPE_PROBE_RESP: | |
1916 | case IEEE80211_STYPE_BEACON: | |
f0706e82 JB |
1917 | case IEEE80211_STYPE_AUTH: |
1918 | case IEEE80211_STYPE_ASSOC_RESP: | |
1919 | case IEEE80211_STYPE_REASSOC_RESP: | |
1920 | case IEEE80211_STYPE_DEAUTH: | |
1921 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1922 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1923 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1924 | return RX_QUEUED; | |
f0706e82 JB |
1925 | } |
1926 | ||
46900298 | 1927 | return RX_DROP_MONITOR; |
f0706e82 JB |
1928 | } |
1929 | ||
f698d856 | 1930 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1931 | struct sk_buff *skb) |
1932 | { | |
1933 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1934 | struct ieee80211_mgmt *mgmt; |
1935 | u16 fc; | |
1936 | ||
f0706e82 JB |
1937 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1938 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1939 | fc = le16_to_cpu(mgmt->frame_control); | |
1940 | ||
46900298 JB |
1941 | switch (fc & IEEE80211_FCTL_STYPE) { |
1942 | case IEEE80211_STYPE_PROBE_RESP: | |
1943 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1944 | rx_status); | |
1945 | break; | |
1946 | case IEEE80211_STYPE_BEACON: | |
1947 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1948 | rx_status); | |
1949 | break; | |
1950 | case IEEE80211_STYPE_AUTH: | |
1951 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1952 | break; | |
1953 | case IEEE80211_STYPE_ASSOC_RESP: | |
1954 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1955 | break; | |
1956 | case IEEE80211_STYPE_REASSOC_RESP: | |
1957 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1958 | break; | |
1959 | case IEEE80211_STYPE_DEAUTH: | |
1960 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1961 | break; | |
1962 | case IEEE80211_STYPE_DISASSOC: | |
1963 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1964 | break; | |
f0706e82 JB |
1965 | } |
1966 | ||
1967 | kfree_skb(skb); | |
1968 | } | |
1969 | ||
9c6bd790 | 1970 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1971 | { |
60f8b39c JB |
1972 | struct ieee80211_sub_if_data *sdata = |
1973 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 1974 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 1975 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1976 | |
5bb644a0 JB |
1977 | if (local->quiescing) { |
1978 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
1979 | return; | |
1980 | } | |
1981 | ||
46900298 JB |
1982 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
1983 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1984 | } |
1985 | ||
46900298 | 1986 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1987 | { |
46900298 | 1988 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1989 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1990 | |
24487981 JB |
1991 | /* Reset own TSF to allow time synchronization work. */ |
1992 | drv_reset_tsf(local); | |
f0706e82 | 1993 | |
46900298 | 1994 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
46900298 JB |
1995 | ifmgd->auth_transaction = -1; |
1996 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
1997 | ifmgd->assoc_scan_tries = 0; | |
1998 | ifmgd->direct_probe_tries = 0; | |
1999 | ifmgd->auth_tries = 0; | |
2000 | ifmgd->assoc_tries = 0; | |
24e64622 | 2001 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2002 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2003 | } |
2004 | ||
46900298 | 2005 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2006 | { |
46900298 | 2007 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2008 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2009 | struct ieee80211_bss *bss; |
46900298 JB |
2010 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2011 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2012 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2013 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2014 | struct ieee80211_channel *chan = local->oper_channel; | |
2015 | ||
00d3f14c JB |
2016 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, |
2017 | bssid, ssid, ssid_len, | |
2018 | capa_mask, capa_val); | |
2019 | ||
2020 | if (bss) { | |
7e9debe9 JB |
2021 | local->oper_channel = bss->cbss.channel; |
2022 | local->oper_channel_type = NL80211_CHAN_NO_HT; | |
2023 | ieee80211_hw_config(local, 0); | |
2024 | ||
00d3f14c JB |
2025 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, |
2026 | bss->supp_rates); | |
46900298 JB |
2027 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2028 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2029 | else |
46900298 | 2030 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2031 | |
9c6bd790 JB |
2032 | /* Send out direct probe if no probe resp was received or |
2033 | * the one we have is outdated | |
2034 | */ | |
00d3f14c JB |
2035 | if (!bss->last_probe_resp || |
2036 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2037 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2038 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2039 | else |
46900298 | 2040 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2041 | |
00d3f14c | 2042 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2043 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2044 | return 0; |
2045 | } else { | |
46900298 | 2046 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 | 2047 | |
46900298 | 2048 | ifmgd->assoc_scan_tries++; |
af88b907 | 2049 | |
f3b85252 JB |
2050 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2051 | ssid_len); | |
af88b907 | 2052 | |
46900298 JB |
2053 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2054 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2055 | } else { |
46900298 JB |
2056 | ifmgd->assoc_scan_tries = 0; |
2057 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 2058 | ieee80211_recalc_idle(local); |
e374055a | 2059 | } |
9c6bd790 JB |
2060 | } |
2061 | return -1; | |
2062 | } | |
2063 | ||
2064 | ||
2065 | static void ieee80211_sta_work(struct work_struct *work) | |
2066 | { | |
2067 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2068 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2069 | struct ieee80211_local *local = sdata->local; |
46900298 | 2070 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2071 | struct sk_buff *skb; |
2072 | ||
2073 | if (!netif_running(sdata->dev)) | |
2074 | return; | |
2075 | ||
c2b13452 | 2076 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2077 | return; |
2078 | ||
46900298 | 2079 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2080 | return; |
5bb644a0 JB |
2081 | |
2082 | /* | |
2083 | * Nothing should have been stuffed into the workqueue during | |
2084 | * the suspend->resume cycle. If this WARN is seen then there | |
2085 | * is a bug with either the driver suspend or something in | |
2086 | * mac80211 stuffing into the workqueue which we haven't yet | |
2087 | * cleared during mac80211's suspend cycle. | |
2088 | */ | |
2089 | if (WARN_ON(local->suspended)) | |
2090 | return; | |
2091 | ||
46900298 | 2092 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2093 | |
46900298 | 2094 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2095 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2096 | ||
46900298 JB |
2097 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2098 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2099 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2100 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2101 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2102 | round_jiffies_relative(0)); | |
9c6bd790 | 2103 | return; |
f0706e82 JB |
2104 | } |
2105 | ||
46900298 JB |
2106 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2107 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2108 | return; |
46900298 JB |
2109 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2110 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2111 | return; |
d6f2da5b | 2112 | |
5cff20e6 JB |
2113 | ieee80211_recalc_idle(local); |
2114 | ||
46900298 | 2115 | switch (ifmgd->state) { |
9c6bd790 JB |
2116 | case IEEE80211_STA_MLME_DISABLED: |
2117 | break; | |
2118 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2119 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2120 | break; |
2121 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2122 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2123 | break; |
2124 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2125 | ieee80211_associate(sdata); |
9c6bd790 JB |
2126 | break; |
2127 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2128 | ieee80211_associated(sdata); |
9c6bd790 JB |
2129 | break; |
2130 | default: | |
2131 | WARN_ON(1); | |
2132 | break; | |
2133 | } | |
f0706e82 JB |
2134 | } |
2135 | ||
9c6bd790 JB |
2136 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2137 | { | |
ad935687 KV |
2138 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2139 | /* | |
2140 | * Need to update last_beacon to avoid beacon loss | |
2141 | * test to trigger. | |
2142 | */ | |
2143 | sdata->u.mgd.last_beacon = jiffies; | |
2144 | ||
2145 | ||
9c6bd790 | 2146 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2147 | &sdata->u.mgd.work); |
ad935687 | 2148 | } |
9c6bd790 | 2149 | } |
f0706e82 | 2150 | |
5bb644a0 JB |
2151 | #ifdef CONFIG_PM |
2152 | void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata) | |
2153 | { | |
2154 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2155 | ||
2156 | /* | |
2157 | * we need to use atomic bitops for the running bits | |
2158 | * only because both timers might fire at the same | |
2159 | * time -- the code here is properly synchronised. | |
2160 | */ | |
2161 | ||
2162 | cancel_work_sync(&ifmgd->work); | |
2163 | cancel_work_sync(&ifmgd->beacon_loss_work); | |
2164 | if (del_timer_sync(&ifmgd->timer)) | |
2165 | set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running); | |
2166 | ||
2167 | cancel_work_sync(&ifmgd->chswitch_work); | |
2168 | if (del_timer_sync(&ifmgd->chswitch_timer)) | |
2169 | set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running); | |
2170 | } | |
2171 | ||
2172 | void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) | |
2173 | { | |
2174 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2175 | ||
2176 | if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running)) | |
2177 | add_timer(&ifmgd->timer); | |
2178 | if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running)) | |
2179 | add_timer(&ifmgd->chswitch_timer); | |
2180 | } | |
2181 | #endif | |
2182 | ||
9c6bd790 JB |
2183 | /* interface setup */ |
2184 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2185 | { |
46900298 | 2186 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2187 | u32 hw_flags; |
988c0f72 | 2188 | |
46900298 JB |
2189 | ifmgd = &sdata->u.mgd; |
2190 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2191 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2192 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2193 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2194 | (unsigned long) sdata); |
46900298 | 2195 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2196 | (unsigned long) sdata); |
46900298 | 2197 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2198 | |
46900298 | 2199 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
ab1faead | 2200 | ifmgd->flags = 0; |
176be728 | 2201 | if (sdata->local->hw.queues >= 4) |
46900298 | 2202 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2203 | |
2204 | hw_flags = sdata->local->hw.flags; | |
f0706e82 JB |
2205 | } |
2206 | ||
9c6bd790 | 2207 | /* configuration hooks */ |
46900298 | 2208 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2209 | { |
46900298 | 2210 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2211 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2212 | |
46900298 | 2213 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2214 | return; |
60f8b39c | 2215 | |
ab1faead | 2216 | if (WARN_ON(ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) |
1fa6f4af JB |
2217 | ieee80211_set_disassoc(sdata, true, true, |
2218 | WLAN_REASON_DEAUTH_LEAVING); | |
2219 | ||
ab1faead JB |
2220 | if (WARN_ON(ifmgd->ssid_len == 0)) { |
2221 | /* | |
2222 | * Only allow association to be started if a valid SSID | |
2223 | * is configured. | |
2224 | */ | |
2225 | return; | |
dfe67012 AF |
2226 | } |
2227 | ||
ab1faead JB |
2228 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2229 | queue_work(local->hw.workqueue, &ifmgd->work); | |
9c6bd790 JB |
2230 | } |
2231 | ||
636a5d36 JM |
2232 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2233 | const char *ie, size_t len) | |
9c6bd790 | 2234 | { |
46900298 | 2235 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2236 | |
175427ce JB |
2237 | if (len == 0 && ifmgd->extra_ie_len == 0) |
2238 | return -EALREADY; | |
2239 | ||
2240 | if (len == ifmgd->extra_ie_len && ifmgd->extra_ie && | |
2241 | memcmp(ifmgd->extra_ie, ie, len) == 0) | |
2242 | return -EALREADY; | |
2243 | ||
46900298 | 2244 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2245 | if (len == 0) { |
46900298 JB |
2246 | ifmgd->extra_ie = NULL; |
2247 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2248 | return 0; |
60f8b39c | 2249 | } |
46900298 JB |
2250 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2251 | if (!ifmgd->extra_ie) { | |
2252 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2253 | return -ENOMEM; |
2254 | } | |
46900298 JB |
2255 | memcpy(ifmgd->extra_ie, ie, len); |
2256 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2257 | return 0; |
60f8b39c JB |
2258 | } |
2259 | ||
f698d856 | 2260 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2261 | { |
f4ea83dd | 2262 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2263 | sdata->dev->name, reason); |
f0706e82 | 2264 | |
46900298 | 2265 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2266 | return 0; |
2267 | } | |
2268 | ||
f698d856 | 2269 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2270 | { |
46900298 | 2271 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2272 | |
f4ea83dd | 2273 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2274 | sdata->dev->name, reason); |
f0706e82 | 2275 | |
46900298 JB |
2276 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2277 | return -ENOLINK; | |
f0706e82 | 2278 | |
46900298 | 2279 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2280 | return 0; |
2281 | } | |
84363e6e | 2282 | |
9c6bd790 JB |
2283 | /* scan finished notification */ |
2284 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2285 | { | |
2286 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2287 | |
2288 | /* Restart STA timers */ | |
2289 | rcu_read_lock(); | |
2290 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2291 | ieee80211_restart_sta_timer(sdata); | |
2292 | rcu_read_unlock(); | |
2293 | } | |
10f644a4 JB |
2294 | |
2295 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2296 | unsigned long data, void *dummy) | |
2297 | { | |
2298 | s32 latency_usec = (s32) data; | |
2299 | struct ieee80211_local *local = | |
2300 | container_of(nb, struct ieee80211_local, | |
2301 | network_latency_notifier); | |
2302 | ||
2303 | mutex_lock(&local->iflist_mtx); | |
2304 | ieee80211_recalc_ps(local, latency_usec); | |
2305 | mutex_unlock(&local->iflist_mtx); | |
2306 | ||
2307 | return 0; | |
2308 | } |