Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
5394af4d | 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
f0706e82 JB |
4 | * Copyright 2004, Instant802 Networks, Inc. |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
5b323edb | 14 | #include <linux/delay.h> |
f0706e82 JB |
15 | #include <linux/if_ether.h> |
16 | #include <linux/skbuff.h> | |
f0706e82 | 17 | #include <linux/if_arp.h> |
f0706e82 | 18 | #include <linux/etherdevice.h> |
d0709a65 | 19 | #include <linux/rtnetlink.h> |
10f644a4 | 20 | #include <linux/pm_qos_params.h> |
d91f36db | 21 | #include <linux/crc32.h> |
f0706e82 | 22 | #include <net/mac80211.h> |
472dbc45 | 23 | #include <asm/unaligned.h> |
60f8b39c | 24 | |
f0706e82 | 25 | #include "ieee80211_i.h" |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 JB |
27 | #include "rate.h" |
28 | #include "led.h" | |
f0706e82 | 29 | |
6042a3e3 | 30 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
31 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
32 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
33 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
34 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
35 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
e0502de6 | 36 | #define IEEE80211_PROBE_WAIT (HZ / 20) |
15b7b062 | 37 | #define IEEE80211_PROBE_IDLE_TIME (60 * HZ) |
f0706e82 | 38 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) |
f0706e82 | 39 | |
5484e237 JB |
40 | /* utils */ |
41 | static int ecw2cw(int ecw) | |
60f8b39c | 42 | { |
5484e237 | 43 | return (1 << ecw) - 1; |
60f8b39c JB |
44 | } |
45 | ||
c2b13452 | 46 | static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie) |
43ac2ca3 JM |
47 | { |
48 | u8 *end, *pos; | |
49 | ||
00d3f14c | 50 | pos = bss->cbss.information_elements; |
43ac2ca3 JM |
51 | if (pos == NULL) |
52 | return NULL; | |
00d3f14c | 53 | end = pos + bss->cbss.len_information_elements; |
43ac2ca3 JM |
54 | |
55 | while (pos + 1 < end) { | |
56 | if (pos + 2 + pos[1] > end) | |
57 | break; | |
58 | if (pos[0] == ie) | |
59 | return pos; | |
60 | pos += 2 + pos[1]; | |
61 | } | |
62 | ||
63 | return NULL; | |
64 | } | |
65 | ||
c2b13452 | 66 | static int ieee80211_compatible_rates(struct ieee80211_bss *bss, |
9ac19a90 | 67 | struct ieee80211_supported_band *sband, |
881d948c | 68 | u32 *rates) |
9ac19a90 JB |
69 | { |
70 | int i, j, count; | |
71 | *rates = 0; | |
72 | count = 0; | |
73 | for (i = 0; i < bss->supp_rates_len; i++) { | |
74 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
75 | ||
76 | for (j = 0; j < sband->n_bitrates; j++) | |
77 | if (sband->bitrates[j].bitrate == rate) { | |
78 | *rates |= BIT(j); | |
79 | count++; | |
80 | break; | |
81 | } | |
82 | } | |
83 | ||
84 | return count; | |
85 | } | |
86 | ||
d5522e03 JB |
87 | /* |
88 | * ieee80211_enable_ht should be called only after the operating band | |
89 | * has been determined as ht configuration depends on the hw's | |
90 | * HT abilities for a specific band. | |
91 | */ | |
92 | static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, | |
93 | struct ieee80211_ht_info *hti, | |
94 | u16 ap_ht_cap_flags) | |
95 | { | |
96 | struct ieee80211_local *local = sdata->local; | |
97 | struct ieee80211_supported_band *sband; | |
98 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
d5522e03 JB |
99 | struct sta_info *sta; |
100 | u32 changed = 0; | |
9ed6bcce | 101 | u16 ht_opmode; |
d5522e03 JB |
102 | bool enable_ht = true, ht_changed; |
103 | enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; | |
104 | ||
105 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
106 | ||
d5522e03 JB |
107 | /* HT is not supported */ |
108 | if (!sband->ht_cap.ht_supported) | |
109 | enable_ht = false; | |
110 | ||
111 | /* check that channel matches the right operating channel */ | |
112 | if (local->hw.conf.channel->center_freq != | |
113 | ieee80211_channel_to_frequency(hti->control_chan)) | |
114 | enable_ht = false; | |
115 | ||
116 | if (enable_ht) { | |
117 | channel_type = NL80211_CHAN_HT20; | |
118 | ||
119 | if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && | |
120 | (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && | |
121 | (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { | |
122 | switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { | |
123 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
768777ea LR |
124 | if (!(local->hw.conf.channel->flags & |
125 | IEEE80211_CHAN_NO_HT40PLUS)) | |
126 | channel_type = NL80211_CHAN_HT40PLUS; | |
d5522e03 JB |
127 | break; |
128 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
768777ea LR |
129 | if (!(local->hw.conf.channel->flags & |
130 | IEEE80211_CHAN_NO_HT40MINUS)) | |
131 | channel_type = NL80211_CHAN_HT40MINUS; | |
d5522e03 JB |
132 | break; |
133 | } | |
134 | } | |
135 | } | |
136 | ||
137 | ht_changed = conf_is_ht(&local->hw.conf) != enable_ht || | |
138 | channel_type != local->hw.conf.channel_type; | |
139 | ||
140 | local->oper_channel_type = channel_type; | |
141 | ||
142 | if (ht_changed) { | |
143 | /* channel_type change automatically detected */ | |
144 | ieee80211_hw_config(local, 0); | |
145 | ||
146 | rcu_read_lock(); | |
147 | ||
148 | sta = sta_info_get(local, ifmgd->bssid); | |
149 | if (sta) | |
150 | rate_control_rate_update(local, sband, sta, | |
151 | IEEE80211_RC_HT_CHANGED); | |
152 | ||
153 | rcu_read_unlock(); | |
d5522e03 JB |
154 | } |
155 | ||
156 | /* disable HT */ | |
157 | if (!enable_ht) | |
158 | return 0; | |
159 | ||
9ed6bcce | 160 | ht_opmode = le16_to_cpu(hti->operation_mode); |
d5522e03 JB |
161 | |
162 | /* if bss configuration changed store the new one */ | |
413ad50a JB |
163 | if (!sdata->ht_opmode_valid || |
164 | sdata->vif.bss_conf.ht_operation_mode != ht_opmode) { | |
d5522e03 | 165 | changed |= BSS_CHANGED_HT; |
9ed6bcce | 166 | sdata->vif.bss_conf.ht_operation_mode = ht_opmode; |
413ad50a | 167 | sdata->ht_opmode_valid = true; |
d5522e03 JB |
168 | } |
169 | ||
170 | return changed; | |
171 | } | |
172 | ||
9c6bd790 JB |
173 | /* frame sending functions */ |
174 | ||
46900298 | 175 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) |
9ac19a90 | 176 | { |
46900298 | 177 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
178 | struct ieee80211_local *local = sdata->local; |
179 | struct sk_buff *skb; | |
180 | struct ieee80211_mgmt *mgmt; | |
65fc73ac | 181 | u8 *pos, *ies, *ht_ie; |
9ac19a90 JB |
182 | int i, len, count, rates_len, supp_rates_len; |
183 | u16 capab; | |
c2b13452 | 184 | struct ieee80211_bss *bss; |
9ac19a90 JB |
185 | int wmm = 0; |
186 | struct ieee80211_supported_band *sband; | |
881d948c | 187 | u32 rates = 0; |
9ac19a90 JB |
188 | |
189 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
46900298 | 190 | sizeof(*mgmt) + 200 + ifmgd->extra_ie_len + |
65fc73ac | 191 | ifmgd->ssid_len); |
9ac19a90 JB |
192 | if (!skb) { |
193 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
194 | "frame\n", sdata->dev->name); | |
195 | return; | |
196 | } | |
197 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
198 | ||
199 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
200 | ||
46900298 | 201 | capab = ifmgd->capab; |
9ac19a90 JB |
202 | |
203 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
204 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
205 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
206 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
207 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
208 | } | |
209 | ||
46900298 | 210 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
9ac19a90 | 211 | local->hw.conf.channel->center_freq, |
46900298 | 212 | ifmgd->ssid, ifmgd->ssid_len); |
9ac19a90 | 213 | if (bss) { |
00d3f14c | 214 | if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY) |
9ac19a90 JB |
215 | capab |= WLAN_CAPABILITY_PRIVACY; |
216 | if (bss->wmm_used) | |
217 | wmm = 1; | |
218 | ||
219 | /* get all rates supported by the device and the AP as | |
220 | * some APs don't like getting a superset of their rates | |
221 | * in the association request (e.g. D-Link DAP 1353 in | |
222 | * b-only mode) */ | |
223 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
224 | ||
00d3f14c | 225 | if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
9ac19a90 JB |
226 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) |
227 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
228 | ||
229 | ieee80211_rx_bss_put(local, bss); | |
230 | } else { | |
231 | rates = ~0; | |
232 | rates_len = sband->n_bitrates; | |
233 | } | |
234 | ||
235 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
236 | memset(mgmt, 0, 24); | |
46900298 | 237 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 238 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 239 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 240 | |
46900298 | 241 | if (ifmgd->flags & IEEE80211_STA_PREV_BSSID_SET) { |
9ac19a90 JB |
242 | skb_put(skb, 10); |
243 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
244 | IEEE80211_STYPE_REASSOC_REQ); | |
245 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
246 | mgmt->u.reassoc_req.listen_interval = | |
247 | cpu_to_le16(local->hw.conf.listen_interval); | |
46900298 | 248 | memcpy(mgmt->u.reassoc_req.current_ap, ifmgd->prev_bssid, |
9ac19a90 JB |
249 | ETH_ALEN); |
250 | } else { | |
251 | skb_put(skb, 4); | |
252 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
253 | IEEE80211_STYPE_ASSOC_REQ); | |
254 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
13554121 | 255 | mgmt->u.assoc_req.listen_interval = |
9ac19a90 JB |
256 | cpu_to_le16(local->hw.conf.listen_interval); |
257 | } | |
258 | ||
259 | /* SSID */ | |
46900298 | 260 | ies = pos = skb_put(skb, 2 + ifmgd->ssid_len); |
9ac19a90 | 261 | *pos++ = WLAN_EID_SSID; |
46900298 JB |
262 | *pos++ = ifmgd->ssid_len; |
263 | memcpy(pos, ifmgd->ssid, ifmgd->ssid_len); | |
9ac19a90 JB |
264 | |
265 | /* add all rates which were marked to be used above */ | |
266 | supp_rates_len = rates_len; | |
267 | if (supp_rates_len > 8) | |
268 | supp_rates_len = 8; | |
269 | ||
270 | len = sband->n_bitrates; | |
271 | pos = skb_put(skb, supp_rates_len + 2); | |
272 | *pos++ = WLAN_EID_SUPP_RATES; | |
273 | *pos++ = supp_rates_len; | |
274 | ||
275 | count = 0; | |
276 | for (i = 0; i < sband->n_bitrates; i++) { | |
277 | if (BIT(i) & rates) { | |
278 | int rate = sband->bitrates[i].bitrate; | |
279 | *pos++ = (u8) (rate / 5); | |
280 | if (++count == 8) | |
281 | break; | |
282 | } | |
283 | } | |
284 | ||
285 | if (rates_len > count) { | |
286 | pos = skb_put(skb, rates_len - count + 2); | |
287 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
288 | *pos++ = rates_len - count; | |
289 | ||
290 | for (i++; i < sband->n_bitrates; i++) { | |
291 | if (BIT(i) & rates) { | |
292 | int rate = sband->bitrates[i].bitrate; | |
293 | *pos++ = (u8) (rate / 5); | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { | |
299 | /* 1. power capabilities */ | |
300 | pos = skb_put(skb, 4); | |
301 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
302 | *pos++ = 2; | |
303 | *pos++ = 0; /* min tx power */ | |
304 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
305 | ||
306 | /* 2. supported channels */ | |
307 | /* TODO: get this in reg domain format */ | |
308 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
309 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
310 | *pos++ = 2 * sband->n_channels; | |
311 | for (i = 0; i < sband->n_channels; i++) { | |
312 | *pos++ = ieee80211_frequency_to_channel( | |
313 | sband->channels[i].center_freq); | |
314 | *pos++ = 1; /* one channel in the subband*/ | |
315 | } | |
316 | } | |
317 | ||
46900298 JB |
318 | if (ifmgd->extra_ie) { |
319 | pos = skb_put(skb, ifmgd->extra_ie_len); | |
320 | memcpy(pos, ifmgd->extra_ie, ifmgd->extra_ie_len); | |
9ac19a90 JB |
321 | } |
322 | ||
46900298 | 323 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) { |
9ac19a90 JB |
324 | pos = skb_put(skb, 9); |
325 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
326 | *pos++ = 7; /* len */ | |
327 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
328 | *pos++ = 0x50; | |
329 | *pos++ = 0xf2; | |
330 | *pos++ = 2; /* WME */ | |
331 | *pos++ = 0; /* WME info */ | |
332 | *pos++ = 1; /* WME ver */ | |
333 | *pos++ = 0; | |
334 | } | |
335 | ||
336 | /* wmm support is a must to HT */ | |
eb46936b VT |
337 | /* |
338 | * IEEE802.11n does not allow TKIP/WEP as pairwise | |
339 | * ciphers in HT mode. We still associate in non-ht | |
340 | * mode (11a/b/g) if any one of these ciphers is | |
341 | * configured as pairwise. | |
342 | */ | |
46900298 | 343 | if (wmm && (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
d9fe60de JB |
344 | sband->ht_cap.ht_supported && |
345 | (ht_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_INFORMATION)) && | |
eb46936b | 346 | ht_ie[1] >= sizeof(struct ieee80211_ht_info) && |
46900298 | 347 | (!(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED))) { |
d9fe60de JB |
348 | struct ieee80211_ht_info *ht_info = |
349 | (struct ieee80211_ht_info *)(ht_ie + 2); | |
350 | u16 cap = sband->ht_cap.cap; | |
9ac19a90 JB |
351 | __le16 tmp; |
352 | u32 flags = local->hw.conf.channel->flags; | |
353 | ||
d9fe60de JB |
354 | switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { |
355 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
689da1b3 | 356 | if (flags & IEEE80211_CHAN_NO_HT40PLUS) { |
d9fe60de | 357 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
358 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
359 | } | |
360 | break; | |
d9fe60de | 361 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
689da1b3 | 362 | if (flags & IEEE80211_CHAN_NO_HT40MINUS) { |
d9fe60de | 363 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
9ac19a90 JB |
364 | cap &= ~IEEE80211_HT_CAP_SGI_40; |
365 | } | |
366 | break; | |
367 | } | |
368 | ||
369 | tmp = cpu_to_le16(cap); | |
370 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
371 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
372 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
373 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
374 | memcpy(pos, &tmp, sizeof(u16)); | |
375 | pos += sizeof(u16); | |
376 | /* TODO: needs a define here for << 2 */ | |
d9fe60de JB |
377 | *pos++ = sband->ht_cap.ampdu_factor | |
378 | (sband->ht_cap.ampdu_density << 2); | |
379 | memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs)); | |
9ac19a90 JB |
380 | } |
381 | ||
46900298 JB |
382 | kfree(ifmgd->assocreq_ies); |
383 | ifmgd->assocreq_ies_len = (skb->data + skb->len) - ies; | |
384 | ifmgd->assocreq_ies = kmalloc(ifmgd->assocreq_ies_len, GFP_KERNEL); | |
385 | if (ifmgd->assocreq_ies) | |
386 | memcpy(ifmgd->assocreq_ies, ies, ifmgd->assocreq_ies_len); | |
9ac19a90 | 387 | |
e50db65c | 388 | ieee80211_tx_skb(sdata, skb, 0); |
9ac19a90 JB |
389 | } |
390 | ||
391 | ||
ef422bc0 JB |
392 | static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, |
393 | u16 stype, u16 reason) | |
9ac19a90 JB |
394 | { |
395 | struct ieee80211_local *local = sdata->local; | |
46900298 | 396 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9ac19a90 JB |
397 | struct sk_buff *skb; |
398 | struct ieee80211_mgmt *mgmt; | |
9aed3cc1 | 399 | |
65fc73ac | 400 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); |
9ac19a90 | 401 | if (!skb) { |
ef422bc0 JB |
402 | printk(KERN_DEBUG "%s: failed to allocate buffer for " |
403 | "deauth/disassoc frame\n", sdata->dev->name); | |
9ac19a90 JB |
404 | return; |
405 | } | |
406 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
407 | ||
408 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
409 | memset(mgmt, 0, 24); | |
46900298 | 410 | memcpy(mgmt->da, ifmgd->bssid, ETH_ALEN); |
9ac19a90 | 411 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
46900298 | 412 | memcpy(mgmt->bssid, ifmgd->bssid, ETH_ALEN); |
ef422bc0 | 413 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); |
9ac19a90 | 414 | skb_put(skb, 2); |
ef422bc0 | 415 | /* u.deauth.reason_code == u.disassoc.reason_code */ |
9ac19a90 JB |
416 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); |
417 | ||
53b46b84 JM |
418 | if (stype == IEEE80211_STYPE_DEAUTH) |
419 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, skb->len); | |
420 | else | |
421 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, skb->len); | |
46900298 | 422 | ieee80211_tx_skb(sdata, skb, ifmgd->flags & IEEE80211_STA_MFP_ENABLED); |
9ac19a90 JB |
423 | } |
424 | ||
572e0012 KV |
425 | void ieee80211_send_pspoll(struct ieee80211_local *local, |
426 | struct ieee80211_sub_if_data *sdata) | |
427 | { | |
46900298 | 428 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
572e0012 KV |
429 | struct ieee80211_pspoll *pspoll; |
430 | struct sk_buff *skb; | |
431 | u16 fc; | |
432 | ||
433 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
434 | if (!skb) { | |
435 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
436 | "pspoll frame\n", sdata->dev->name); | |
437 | return; | |
438 | } | |
439 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
440 | ||
441 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
442 | memset(pspoll, 0, sizeof(*pspoll)); | |
443 | fc = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM; | |
444 | pspoll->frame_control = cpu_to_le16(fc); | |
46900298 | 445 | pspoll->aid = cpu_to_le16(ifmgd->aid); |
572e0012 KV |
446 | |
447 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
448 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
449 | ||
46900298 | 450 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); |
572e0012 KV |
451 | memcpy(pspoll->ta, sdata->dev->dev_addr, ETH_ALEN); |
452 | ||
453 | ieee80211_tx_skb(sdata, skb, 0); | |
572e0012 KV |
454 | } |
455 | ||
965bedad JB |
456 | void ieee80211_send_nullfunc(struct ieee80211_local *local, |
457 | struct ieee80211_sub_if_data *sdata, | |
458 | int powersave) | |
459 | { | |
460 | struct sk_buff *skb; | |
461 | struct ieee80211_hdr *nullfunc; | |
462 | __le16 fc; | |
463 | ||
464 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) | |
465 | return; | |
466 | ||
467 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
468 | if (!skb) { | |
469 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
470 | "frame\n", sdata->dev->name); | |
471 | return; | |
472 | } | |
473 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
474 | ||
475 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
476 | memset(nullfunc, 0, 24); | |
477 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
478 | IEEE80211_FCTL_TODS); | |
479 | if (powersave) | |
480 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); | |
481 | nullfunc->frame_control = fc; | |
482 | memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
483 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
484 | memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
485 | ||
486 | ieee80211_tx_skb(sdata, skb, 0); | |
487 | } | |
488 | ||
489 | /* powersave */ | |
490 | static void ieee80211_enable_ps(struct ieee80211_local *local, | |
491 | struct ieee80211_sub_if_data *sdata) | |
492 | { | |
493 | struct ieee80211_conf *conf = &local->hw.conf; | |
494 | ||
d5edaedc JB |
495 | /* |
496 | * If we are scanning right now then the parameters will | |
497 | * take effect when scan finishes. | |
498 | */ | |
499 | if (local->hw_scanning || local->sw_scanning) | |
500 | return; | |
501 | ||
965bedad JB |
502 | if (conf->dynamic_ps_timeout > 0 && |
503 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) { | |
504 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
505 | msecs_to_jiffies(conf->dynamic_ps_timeout)); | |
506 | } else { | |
507 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
508 | ieee80211_send_nullfunc(local, sdata, 1); | |
509 | conf->flags |= IEEE80211_CONF_PS; | |
510 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
511 | } | |
512 | } | |
513 | ||
514 | static void ieee80211_change_ps(struct ieee80211_local *local) | |
515 | { | |
516 | struct ieee80211_conf *conf = &local->hw.conf; | |
517 | ||
518 | if (local->ps_sdata) { | |
519 | if (!(local->ps_sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) | |
520 | return; | |
521 | ||
522 | ieee80211_enable_ps(local, local->ps_sdata); | |
523 | } else if (conf->flags & IEEE80211_CONF_PS) { | |
524 | conf->flags &= ~IEEE80211_CONF_PS; | |
525 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
526 | del_timer_sync(&local->dynamic_ps_timer); | |
527 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
528 | } | |
529 | } | |
530 | ||
531 | /* need to hold RTNL or interface lock */ | |
10f644a4 | 532 | void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency) |
965bedad JB |
533 | { |
534 | struct ieee80211_sub_if_data *sdata, *found = NULL; | |
535 | int count = 0; | |
536 | ||
537 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) { | |
538 | local->ps_sdata = NULL; | |
539 | return; | |
540 | } | |
541 | ||
542 | list_for_each_entry(sdata, &local->interfaces, list) { | |
543 | if (!netif_running(sdata->dev)) | |
544 | continue; | |
545 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
546 | continue; | |
547 | found = sdata; | |
548 | count++; | |
549 | } | |
550 | ||
10f644a4 JB |
551 | if (count == 1 && found->u.mgd.powersave) { |
552 | s32 beaconint_us; | |
553 | ||
554 | if (latency < 0) | |
555 | latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY); | |
556 | ||
557 | beaconint_us = ieee80211_tu_to_usec( | |
558 | found->vif.bss_conf.beacon_int); | |
559 | ||
04fe2037 | 560 | if (beaconint_us > latency) { |
10f644a4 | 561 | local->ps_sdata = NULL; |
04fe2037 JB |
562 | } else { |
563 | u8 dtimper = found->vif.bss_conf.dtim_period; | |
564 | int maxslp = 1; | |
565 | ||
566 | if (dtimper > 1) | |
567 | maxslp = min_t(int, dtimper, | |
568 | latency / beaconint_us); | |
569 | ||
9ccebe61 | 570 | local->hw.conf.max_sleep_period = maxslp; |
10f644a4 | 571 | local->ps_sdata = found; |
04fe2037 | 572 | } |
10f644a4 | 573 | } else { |
965bedad | 574 | local->ps_sdata = NULL; |
10f644a4 | 575 | } |
965bedad JB |
576 | |
577 | ieee80211_change_ps(local); | |
578 | } | |
579 | ||
580 | void ieee80211_dynamic_ps_disable_work(struct work_struct *work) | |
581 | { | |
582 | struct ieee80211_local *local = | |
583 | container_of(work, struct ieee80211_local, | |
584 | dynamic_ps_disable_work); | |
585 | ||
586 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
587 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
588 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
589 | } | |
590 | ||
591 | ieee80211_wake_queues_by_reason(&local->hw, | |
592 | IEEE80211_QUEUE_STOP_REASON_PS); | |
593 | } | |
594 | ||
595 | void ieee80211_dynamic_ps_enable_work(struct work_struct *work) | |
596 | { | |
597 | struct ieee80211_local *local = | |
598 | container_of(work, struct ieee80211_local, | |
599 | dynamic_ps_enable_work); | |
600 | struct ieee80211_sub_if_data *sdata = local->ps_sdata; | |
601 | ||
602 | /* can only happen when PS was just disabled anyway */ | |
603 | if (!sdata) | |
604 | return; | |
605 | ||
606 | if (local->hw.conf.flags & IEEE80211_CONF_PS) | |
607 | return; | |
608 | ||
609 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
610 | ieee80211_send_nullfunc(local, sdata, 1); | |
611 | ||
612 | local->hw.conf.flags |= IEEE80211_CONF_PS; | |
613 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
614 | } | |
615 | ||
616 | void ieee80211_dynamic_ps_timer(unsigned long data) | |
617 | { | |
618 | struct ieee80211_local *local = (void *) data; | |
619 | ||
620 | queue_work(local->hw.workqueue, &local->dynamic_ps_enable_work); | |
621 | } | |
622 | ||
60f8b39c | 623 | /* MLME */ |
f698d856 | 624 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
46900298 | 625 | struct ieee80211_if_managed *ifmgd, |
f0706e82 JB |
626 | u8 *wmm_param, size_t wmm_param_len) |
627 | { | |
f0706e82 JB |
628 | struct ieee80211_tx_queue_params params; |
629 | size_t left; | |
630 | int count; | |
631 | u8 *pos; | |
632 | ||
46900298 | 633 | if (!(ifmgd->flags & IEEE80211_STA_WMM_ENABLED)) |
3434fbd3 JB |
634 | return; |
635 | ||
636 | if (!wmm_param) | |
637 | return; | |
638 | ||
f0706e82 JB |
639 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
640 | return; | |
641 | count = wmm_param[6] & 0x0f; | |
46900298 | 642 | if (count == ifmgd->wmm_last_param_set) |
f0706e82 | 643 | return; |
46900298 | 644 | ifmgd->wmm_last_param_set = count; |
f0706e82 JB |
645 | |
646 | pos = wmm_param + 8; | |
647 | left = wmm_param_len - 8; | |
648 | ||
649 | memset(¶ms, 0, sizeof(params)); | |
650 | ||
f0706e82 JB |
651 | local->wmm_acm = 0; |
652 | for (; left >= 4; left -= 4, pos += 4) { | |
653 | int aci = (pos[0] >> 5) & 0x03; | |
654 | int acm = (pos[0] >> 4) & 0x01; | |
655 | int queue; | |
656 | ||
657 | switch (aci) { | |
0eeb59fe | 658 | case 1: /* AC_BK */ |
e100bb64 | 659 | queue = 3; |
988c0f72 | 660 | if (acm) |
0eeb59fe | 661 | local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ |
f0706e82 | 662 | break; |
0eeb59fe | 663 | case 2: /* AC_VI */ |
e100bb64 | 664 | queue = 1; |
988c0f72 | 665 | if (acm) |
0eeb59fe | 666 | local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ |
f0706e82 | 667 | break; |
0eeb59fe | 668 | case 3: /* AC_VO */ |
e100bb64 | 669 | queue = 0; |
988c0f72 | 670 | if (acm) |
0eeb59fe | 671 | local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ |
f0706e82 | 672 | break; |
0eeb59fe | 673 | case 0: /* AC_BE */ |
f0706e82 | 674 | default: |
e100bb64 | 675 | queue = 2; |
988c0f72 | 676 | if (acm) |
0eeb59fe | 677 | local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ |
f0706e82 JB |
678 | break; |
679 | } | |
680 | ||
681 | params.aifs = pos[0] & 0x0f; | |
682 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
683 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 684 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 685 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 686 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 687 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 688 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
689 | params.cw_max, params.txop); |
690 | #endif | |
24487981 | 691 | if (drv_conf_tx(local, queue, ¶ms) && local->ops->conf_tx) |
f0706e82 | 692 | printk(KERN_DEBUG "%s: failed to set TX queue " |
24487981 JB |
693 | "parameters for queue %d\n", local->mdev->name, |
694 | queue); | |
f0706e82 JB |
695 | } |
696 | } | |
697 | ||
7a5158ef JB |
698 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, |
699 | u16 capab, bool erp_valid, u8 erp) | |
5628221c | 700 | { |
bda3933a | 701 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
ebd74487 | 702 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
46900298 | 703 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
ebd74487 | 704 | #endif |
471b3efd | 705 | u32 changed = 0; |
7a5158ef JB |
706 | bool use_protection; |
707 | bool use_short_preamble; | |
708 | bool use_short_slot; | |
709 | ||
710 | if (erp_valid) { | |
711 | use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; | |
712 | use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
713 | } else { | |
714 | use_protection = false; | |
715 | use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); | |
716 | } | |
717 | ||
718 | use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); | |
5628221c | 719 | |
471b3efd | 720 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 721 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 722 | if (net_ratelimit()) { |
0c68ae26 | 723 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=%pM)\n", |
471b3efd | 724 | sdata->dev->name, |
5628221c | 725 | use_protection ? "enabled" : "disabled", |
46900298 | 726 | ifmgd->bssid); |
5628221c | 727 | } |
f4ea83dd | 728 | #endif |
471b3efd JB |
729 | bss_conf->use_cts_prot = use_protection; |
730 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 731 | } |
7e9ed188 | 732 | |
d43c7b37 | 733 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 734 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
735 | if (net_ratelimit()) { |
736 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0c68ae26 | 737 | " (BSSID=%pM)\n", |
471b3efd | 738 | sdata->dev->name, |
d43c7b37 | 739 | use_short_preamble ? "short" : "long", |
46900298 | 740 | ifmgd->bssid); |
7e9ed188 | 741 | } |
f4ea83dd | 742 | #endif |
d43c7b37 | 743 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 744 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 745 | } |
d9430a32 | 746 | |
7a5158ef JB |
747 | if (use_short_slot != bss_conf->use_short_slot) { |
748 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
749 | if (net_ratelimit()) { | |
391429c1 CL |
750 | printk(KERN_DEBUG "%s: switched to %s slot time" |
751 | " (BSSID=%pM)\n", | |
7a5158ef JB |
752 | sdata->dev->name, |
753 | use_short_slot ? "short" : "long", | |
46900298 | 754 | ifmgd->bssid); |
7a5158ef JB |
755 | } |
756 | #endif | |
757 | bss_conf->use_short_slot = use_short_slot; | |
758 | changed |= BSS_CHANGED_ERP_SLOT; | |
50c4afb9 JL |
759 | } |
760 | ||
761 | return changed; | |
762 | } | |
763 | ||
46900298 | 764 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata) |
f5e5bf25 TW |
765 | { |
766 | union iwreq_data wrqu; | |
46900298 | 767 | |
f5e5bf25 | 768 | memset(&wrqu, 0, sizeof(wrqu)); |
46900298 JB |
769 | if (sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED) |
770 | memcpy(wrqu.ap_addr.sa_data, sdata->u.mgd.bssid, ETH_ALEN); | |
f5e5bf25 TW |
771 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
772 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
773 | } | |
774 | ||
46900298 | 775 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 776 | { |
46900298 | 777 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
74af0250 LT |
778 | char *buf; |
779 | size_t len; | |
780 | int i; | |
f0706e82 JB |
781 | union iwreq_data wrqu; |
782 | ||
46900298 | 783 | if (!ifmgd->assocreq_ies && !ifmgd->assocresp_ies) |
74af0250 LT |
784 | return; |
785 | ||
46900298 JB |
786 | buf = kmalloc(50 + 2 * (ifmgd->assocreq_ies_len + |
787 | ifmgd->assocresp_ies_len), GFP_KERNEL); | |
74af0250 LT |
788 | if (!buf) |
789 | return; | |
790 | ||
791 | len = sprintf(buf, "ASSOCINFO("); | |
46900298 | 792 | if (ifmgd->assocreq_ies) { |
74af0250 | 793 | len += sprintf(buf + len, "ReqIEs="); |
46900298 | 794 | for (i = 0; i < ifmgd->assocreq_ies_len; i++) { |
74af0250 | 795 | len += sprintf(buf + len, "%02x", |
46900298 | 796 | ifmgd->assocreq_ies[i]); |
74af0250 | 797 | } |
f0706e82 | 798 | } |
46900298 JB |
799 | if (ifmgd->assocresp_ies) { |
800 | if (ifmgd->assocreq_ies) | |
74af0250 LT |
801 | len += sprintf(buf + len, " "); |
802 | len += sprintf(buf + len, "RespIEs="); | |
46900298 | 803 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 804 | len += sprintf(buf + len, "%02x", |
46900298 | 805 | ifmgd->assocresp_ies[i]); |
74af0250 | 806 | } |
f0706e82 | 807 | } |
74af0250 LT |
808 | len += sprintf(buf + len, ")"); |
809 | ||
810 | if (len > IW_CUSTOM_MAX) { | |
811 | len = sprintf(buf, "ASSOCRESPIE="); | |
46900298 | 812 | for (i = 0; i < ifmgd->assocresp_ies_len; i++) { |
74af0250 | 813 | len += sprintf(buf + len, "%02x", |
46900298 | 814 | ifmgd->assocresp_ies[i]); |
74af0250 LT |
815 | } |
816 | } | |
817 | ||
ad788b5e JL |
818 | if (len <= IW_CUSTOM_MAX) { |
819 | memset(&wrqu, 0, sizeof(wrqu)); | |
820 | wrqu.data.length = len; | |
821 | wireless_send_event(sdata->dev, IWEVCUSTOM, &wrqu, buf); | |
822 | } | |
74af0250 LT |
823 | |
824 | kfree(buf); | |
f0706e82 JB |
825 | } |
826 | ||
827 | ||
f698d856 | 828 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
ae5eb026 | 829 | u32 bss_info_changed) |
f0706e82 | 830 | { |
46900298 | 831 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 832 | struct ieee80211_local *local = sdata->local; |
38668c05 | 833 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 834 | |
c2b13452 | 835 | struct ieee80211_bss *bss; |
d6f2da5b | 836 | |
ae5eb026 | 837 | bss_info_changed |= BSS_CHANGED_ASSOC; |
46900298 | 838 | ifmgd->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 839 | |
46900298 | 840 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
f5e5bf25 | 841 | conf->channel->center_freq, |
46900298 | 842 | ifmgd->ssid, ifmgd->ssid_len); |
f5e5bf25 TW |
843 | if (bss) { |
844 | /* set timing information */ | |
00d3f14c JB |
845 | sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval; |
846 | sdata->vif.bss_conf.timestamp = bss->cbss.tsf; | |
bda3933a | 847 | sdata->vif.bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 848 | |
57c4d7b4 | 849 | bss_info_changed |= BSS_CHANGED_BEACON_INT; |
ae5eb026 | 850 | bss_info_changed |= ieee80211_handle_bss_capability(sdata, |
00d3f14c | 851 | bss->cbss.capability, bss->has_erp_value, bss->erp_value); |
9ac19a90 | 852 | |
04de8381 KV |
853 | cfg80211_hold_bss(&bss->cbss); |
854 | ||
9ac19a90 | 855 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
856 | } |
857 | ||
46900298 JB |
858 | ifmgd->flags |= IEEE80211_STA_PREV_BSSID_SET; |
859 | memcpy(ifmgd->prev_bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
860 | ieee80211_sta_send_associnfo(sdata); | |
9306102e | 861 | |
46900298 | 862 | ifmgd->last_probe = jiffies; |
9ac19a90 | 863 | ieee80211_led_assoc(local, 1); |
9306102e | 864 | |
bda3933a | 865 | sdata->vif.bss_conf.assoc = 1; |
96dd22ac JB |
866 | /* |
867 | * For now just always ask the driver to update the basic rateset | |
868 | * when we have associated, we aren't checking whether it actually | |
869 | * changed or not. | |
870 | */ | |
ae5eb026 JB |
871 | bss_info_changed |= BSS_CHANGED_BASIC_RATES; |
872 | ieee80211_bss_info_change_notify(sdata, bss_info_changed); | |
f0706e82 | 873 | |
965bedad | 874 | /* will be same as sdata */ |
04fe2037 JB |
875 | if (local->ps_sdata) { |
876 | mutex_lock(&local->iflist_mtx); | |
877 | ieee80211_recalc_ps(local, -1); | |
878 | mutex_unlock(&local->iflist_mtx); | |
879 | } | |
e0cb686f | 880 | |
9ac19a90 JB |
881 | netif_tx_start_all_queues(sdata->dev); |
882 | netif_carrier_on(sdata->dev); | |
f0706e82 | 883 | |
46900298 | 884 | ieee80211_sta_send_apinfo(sdata); |
f0706e82 JB |
885 | } |
886 | ||
46900298 | 887 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 888 | { |
46900298 | 889 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 890 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
891 | |
892 | ifmgd->direct_probe_tries++; | |
893 | if (ifmgd->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 894 | printk(KERN_DEBUG "%s: direct probe to AP %pM timed out\n", |
46900298 JB |
895 | sdata->dev->name, ifmgd->bssid); |
896 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 897 | ieee80211_recalc_idle(local); |
e61f2340 | 898 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
7a947080 VT |
899 | |
900 | /* | |
901 | * Most likely AP is not in the range so remove the | |
902 | * bss information associated to the AP | |
903 | */ | |
46900298 | 904 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 905 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 906 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
907 | |
908 | /* | |
909 | * We might have a pending scan which had no chance to run yet | |
910 | * due to state == IEEE80211_STA_MLME_DIRECT_PROBE. | |
911 | * Hence, queue the STAs work again | |
912 | */ | |
913 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
914 | return; |
915 | } | |
f0706e82 | 916 | |
0c68ae26 | 917 | printk(KERN_DEBUG "%s: direct probe to AP %pM try %d\n", |
46900298 JB |
918 | sdata->dev->name, ifmgd->bssid, |
919 | ifmgd->direct_probe_tries); | |
f0706e82 | 920 | |
46900298 | 921 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 | 922 | |
9ac19a90 JB |
923 | /* Direct probe is sent to broadcast address as some APs |
924 | * will not answer to direct packet in unassociated state. | |
925 | */ | |
926 | ieee80211_send_probe_req(sdata, NULL, | |
70692ad2 | 927 | ifmgd->ssid, ifmgd->ssid_len, NULL, 0); |
9ac19a90 | 928 | |
46900298 | 929 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
60f8b39c | 930 | } |
f0706e82 | 931 | |
9ac19a90 | 932 | |
46900298 | 933 | static void ieee80211_authenticate(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; |
636a5d36 JM |
937 | u8 *ies; |
938 | size_t ies_len; | |
46900298 JB |
939 | |
940 | ifmgd->auth_tries++; | |
941 | if (ifmgd->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0c68ae26 | 942 | printk(KERN_DEBUG "%s: authentication with AP %pM" |
9ac19a90 | 943 | " timed out\n", |
46900298 JB |
944 | sdata->dev->name, ifmgd->bssid); |
945 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 946 | ieee80211_recalc_idle(local); |
1965c853 | 947 | cfg80211_send_auth_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 948 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 949 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 950 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
951 | |
952 | /* | |
953 | * We might have a pending scan which had no chance to run yet | |
954 | * due to state == IEEE80211_STA_MLME_AUTHENTICATE. | |
955 | * Hence, queue the STAs work again | |
956 | */ | |
957 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
958 | return; |
959 | } | |
f0706e82 | 960 | |
46900298 | 961 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0c68ae26 | 962 | printk(KERN_DEBUG "%s: authenticate with AP %pM\n", |
46900298 | 963 | sdata->dev->name, ifmgd->bssid); |
f0706e82 | 964 | |
636a5d36 JM |
965 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
966 | ies = ifmgd->sme_auth_ie; | |
967 | ies_len = ifmgd->sme_auth_ie_len; | |
968 | } else { | |
969 | ies = NULL; | |
970 | ies_len = 0; | |
971 | } | |
972 | ieee80211_send_auth(sdata, 1, ifmgd->auth_alg, ies, ies_len, | |
46900298 JB |
973 | ifmgd->bssid, 0); |
974 | ifmgd->auth_transaction = 2; | |
9ac19a90 | 975 | |
46900298 | 976 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_AUTH_TIMEOUT); |
f0706e82 JB |
977 | } |
978 | ||
5925d976 VN |
979 | /* |
980 | * The disassoc 'reason' argument can be either our own reason | |
981 | * if self disconnected or a reason code from the AP. | |
982 | */ | |
aa458d17 | 983 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
46900298 JB |
984 | bool deauth, bool self_disconnected, |
985 | u16 reason) | |
aa458d17 | 986 | { |
46900298 | 987 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
aa458d17 | 988 | struct ieee80211_local *local = sdata->local; |
04de8381 KV |
989 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
990 | struct ieee80211_bss *bss; | |
aa458d17 | 991 | struct sta_info *sta; |
e0cb686f | 992 | u32 changed = 0, config_changed = 0; |
aa458d17 TW |
993 | |
994 | rcu_read_lock(); | |
995 | ||
46900298 | 996 | sta = sta_info_get(local, ifmgd->bssid); |
aa458d17 TW |
997 | if (!sta) { |
998 | rcu_read_unlock(); | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | if (deauth) { | |
46900298 JB |
1003 | ifmgd->direct_probe_tries = 0; |
1004 | ifmgd->auth_tries = 0; | |
aa458d17 | 1005 | } |
46900298 JB |
1006 | ifmgd->assoc_scan_tries = 0; |
1007 | ifmgd->assoc_tries = 0; | |
aa458d17 | 1008 | |
24e64622 | 1009 | netif_tx_stop_all_queues(sdata->dev); |
aa458d17 TW |
1010 | netif_carrier_off(sdata->dev); |
1011 | ||
2dace10e | 1012 | ieee80211_sta_tear_down_BA_sessions(sta); |
aa458d17 | 1013 | |
04de8381 KV |
1014 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
1015 | conf->channel->center_freq, | |
1016 | ifmgd->ssid, ifmgd->ssid_len); | |
1017 | ||
1018 | if (bss) { | |
1019 | cfg80211_unhold_bss(&bss->cbss); | |
1020 | ieee80211_rx_bss_put(local, bss); | |
1021 | } | |
1022 | ||
aa458d17 TW |
1023 | if (self_disconnected) { |
1024 | if (deauth) | |
ef422bc0 JB |
1025 | ieee80211_send_deauth_disassoc(sdata, |
1026 | IEEE80211_STYPE_DEAUTH, reason); | |
aa458d17 | 1027 | else |
ef422bc0 JB |
1028 | ieee80211_send_deauth_disassoc(sdata, |
1029 | IEEE80211_STYPE_DISASSOC, reason); | |
aa458d17 TW |
1030 | } |
1031 | ||
46900298 | 1032 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; |
f5e5bf25 TW |
1033 | changed |= ieee80211_reset_erp_info(sdata); |
1034 | ||
f5e5bf25 | 1035 | ieee80211_led_assoc(local, 0); |
ae5eb026 JB |
1036 | changed |= BSS_CHANGED_ASSOC; |
1037 | sdata->vif.bss_conf.assoc = false; | |
f5e5bf25 | 1038 | |
46900298 | 1039 | ieee80211_sta_send_apinfo(sdata); |
aa458d17 | 1040 | |
7a947080 | 1041 | if (self_disconnected || reason == WLAN_REASON_DISASSOC_STA_HAS_LEFT) { |
46900298 JB |
1042 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
1043 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, | |
7a947080 | 1044 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1045 | ifmgd->ssid, ifmgd->ssid_len); |
7a947080 | 1046 | } |
aa458d17 | 1047 | |
aa458d17 TW |
1048 | rcu_read_unlock(); |
1049 | ||
aa837e1d JB |
1050 | ieee80211_set_wmm_default(sdata); |
1051 | ||
5cff20e6 JB |
1052 | ieee80211_recalc_idle(local); |
1053 | ||
4797938c | 1054 | /* channel(_type) changes are handled by ieee80211_hw_config */ |
094d05dc | 1055 | local->oper_channel_type = NL80211_CHAN_NO_HT; |
e0cb686f | 1056 | |
413ad50a JB |
1057 | /* on the next assoc, re-program HT parameters */ |
1058 | sdata->ht_opmode_valid = false; | |
1059 | ||
a8302de9 VT |
1060 | local->power_constr_level = 0; |
1061 | ||
520eb820 KV |
1062 | del_timer_sync(&local->dynamic_ps_timer); |
1063 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
1064 | ||
e0cb686f KV |
1065 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
1066 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1067 | config_changed |= IEEE80211_CONF_CHANGE_PS; | |
1068 | } | |
ae5eb026 | 1069 | |
e0cb686f | 1070 | ieee80211_hw_config(local, config_changed); |
ae5eb026 | 1071 | ieee80211_bss_info_change_notify(sdata, changed); |
8e268e47 TW |
1072 | |
1073 | rcu_read_lock(); | |
1074 | ||
46900298 | 1075 | sta = sta_info_get(local, ifmgd->bssid); |
8e268e47 TW |
1076 | if (!sta) { |
1077 | rcu_read_unlock(); | |
1078 | return; | |
1079 | } | |
1080 | ||
1081 | sta_info_unlink(&sta); | |
1082 | ||
1083 | rcu_read_unlock(); | |
1084 | ||
1085 | sta_info_destroy(sta); | |
aa458d17 | 1086 | } |
f0706e82 | 1087 | |
9ac19a90 JB |
1088 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
1089 | { | |
1090 | if (!sdata || !sdata->default_key || | |
1091 | sdata->default_key->conf.alg != ALG_WEP) | |
1092 | return 0; | |
1093 | return 1; | |
1094 | } | |
1095 | ||
46900298 | 1096 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1097 | { |
46900298 | 1098 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1099 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 1100 | struct ieee80211_bss *bss; |
5b98b1f7 JB |
1101 | int bss_privacy; |
1102 | int wep_privacy; | |
1103 | int privacy_invoked; | |
f0706e82 | 1104 | |
7986cf95 | 1105 | if (!ifmgd || (ifmgd->flags & IEEE80211_STA_EXT_SME)) |
f0706e82 JB |
1106 | return 0; |
1107 | ||
46900298 | 1108 | bss = ieee80211_rx_bss_get(local, ifmgd->bssid, |
8318d78a | 1109 | local->hw.conf.channel->center_freq, |
46900298 | 1110 | ifmgd->ssid, ifmgd->ssid_len); |
f0706e82 JB |
1111 | if (!bss) |
1112 | return 0; | |
1113 | ||
00d3f14c | 1114 | bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 1115 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
46900298 | 1116 | privacy_invoked = !!(ifmgd->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 1117 | |
3e122be0 | 1118 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1119 | |
5b98b1f7 JB |
1120 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
1121 | return 0; | |
1122 | ||
1123 | return 1; | |
f0706e82 JB |
1124 | } |
1125 | ||
46900298 | 1126 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1127 | { |
46900298 | 1128 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
11432379 | 1129 | struct ieee80211_local *local = sdata->local; |
46900298 JB |
1130 | |
1131 | ifmgd->assoc_tries++; | |
1132 | if (ifmgd->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0c68ae26 | 1133 | printk(KERN_DEBUG "%s: association with AP %pM" |
f0706e82 | 1134 | " timed out\n", |
46900298 JB |
1135 | sdata->dev->name, ifmgd->bssid); |
1136 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1137 | ieee80211_recalc_idle(local); |
1965c853 | 1138 | cfg80211_send_assoc_timeout(sdata->dev, ifmgd->bssid); |
46900298 | 1139 | ieee80211_rx_bss_remove(sdata, ifmgd->bssid, |
7a947080 | 1140 | sdata->local->hw.conf.channel->center_freq, |
46900298 | 1141 | ifmgd->ssid, ifmgd->ssid_len); |
11432379 HS |
1142 | /* |
1143 | * We might have a pending scan which had no chance to run yet | |
1144 | * due to state == IEEE80211_STA_MLME_ASSOCIATE. | |
1145 | * Hence, queue the STAs work again | |
1146 | */ | |
1147 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
1148 | return; |
1149 | } | |
1150 | ||
46900298 | 1151 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
0c68ae26 | 1152 | printk(KERN_DEBUG "%s: associate with AP %pM\n", |
46900298 JB |
1153 | sdata->dev->name, ifmgd->bssid); |
1154 | if (ieee80211_privacy_mismatch(sdata)) { | |
f0706e82 | 1155 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 1156 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
46900298 | 1157 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; |
5cff20e6 | 1158 | ieee80211_recalc_idle(local); |
f0706e82 JB |
1159 | return; |
1160 | } | |
1161 | ||
46900298 | 1162 | ieee80211_send_assoc(sdata); |
f0706e82 | 1163 | |
46900298 | 1164 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); |
f0706e82 JB |
1165 | } |
1166 | ||
3cf335d5 KV |
1167 | void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata, |
1168 | struct ieee80211_hdr *hdr) | |
1169 | { | |
1170 | /* | |
1171 | * We can postpone the mgd.timer whenever receiving unicast frames | |
1172 | * from AP because we know that the connection is working both ways | |
1173 | * at that time. But multicast frames (and hence also beacons) must | |
1174 | * be ignored here, because we need to trigger the timer during | |
1175 | * data idle periods for sending the periodical probe request to | |
1176 | * the AP. | |
1177 | */ | |
1178 | if (!is_multicast_ether_addr(hdr->addr1)) | |
1179 | mod_timer(&sdata->u.mgd.timer, | |
1180 | jiffies + IEEE80211_MONITORING_INTERVAL); | |
1181 | } | |
f0706e82 | 1182 | |
04de8381 KV |
1183 | void ieee80211_beacon_loss_work(struct work_struct *work) |
1184 | { | |
1185 | struct ieee80211_sub_if_data *sdata = | |
1186 | container_of(work, struct ieee80211_sub_if_data, | |
1187 | u.mgd.beacon_loss_work); | |
1188 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1189 | ||
34bfc411 JB |
1190 | /* |
1191 | * The driver has already reported this event and we have | |
1192 | * already sent a probe request. Maybe the AP died and the | |
1193 | * driver keeps reporting until we disassociate... We have | |
1194 | * to ignore that because otherwise we would continually | |
1195 | * reset the timer and never check whether we received a | |
1196 | * probe response! | |
1197 | */ | |
1198 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1199 | return; | |
1200 | ||
a860402d MB |
1201 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1202 | if (net_ratelimit()) { | |
1203 | printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " | |
1204 | "- sending probe request\n", sdata->dev->name, | |
1205 | sdata->u.mgd.bssid); | |
1206 | } | |
1207 | #endif | |
04de8381 KV |
1208 | |
1209 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1210 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1211 | ifmgd->ssid_len, NULL, 0); | |
1212 | ||
e0502de6 | 1213 | mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT); |
04de8381 KV |
1214 | } |
1215 | ||
1216 | void ieee80211_beacon_loss(struct ieee80211_vif *vif) | |
1217 | { | |
1218 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1219 | ||
1220 | queue_work(sdata->local->hw.workqueue, | |
1221 | &sdata->u.mgd.beacon_loss_work); | |
1222 | } | |
1223 | EXPORT_SYMBOL(ieee80211_beacon_loss); | |
1224 | ||
46900298 | 1225 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1226 | { |
46900298 | 1227 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 1228 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 1229 | struct sta_info *sta; |
15b7b062 | 1230 | bool disassoc = false; |
f0706e82 JB |
1231 | |
1232 | /* TODO: start monitoring current AP signal quality and number of | |
1233 | * missed beacons. Scan other channels every now and then and search | |
1234 | * for better APs. */ | |
1235 | /* TODO: remove expired BSSes */ | |
1236 | ||
46900298 | 1237 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 1238 | |
d0709a65 JB |
1239 | rcu_read_lock(); |
1240 | ||
46900298 | 1241 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1242 | if (!sta) { |
0c68ae26 | 1243 | printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n", |
46900298 | 1244 | sdata->dev->name, ifmgd->bssid); |
15b7b062 KV |
1245 | disassoc = true; |
1246 | goto unlock; | |
1247 | } | |
1248 | ||
1249 | if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) && | |
e0502de6 | 1250 | time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) { |
15b7b062 KV |
1251 | printk(KERN_DEBUG "%s: no probe response from AP %pM " |
1252 | "- disassociating\n", | |
1253 | sdata->dev->name, ifmgd->bssid); | |
1254 | disassoc = true; | |
1255 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
1256 | goto unlock; | |
1257 | } | |
1258 | ||
04de8381 KV |
1259 | /* |
1260 | * Beacon filtering is only enabled with power save and then the | |
1261 | * stack should not check for beacon loss. | |
1262 | */ | |
1263 | if (!((local->hw.flags & IEEE80211_HW_BEACON_FILTER) && | |
1264 | (local->hw.conf.flags & IEEE80211_CONF_PS)) && | |
1265 | time_after(jiffies, | |
15b7b062 | 1266 | ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { |
a860402d MB |
1267 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
1268 | if (net_ratelimit()) { | |
1269 | printk(KERN_DEBUG "%s: beacon loss from AP %pM " | |
1270 | "- sending probe request\n", | |
1271 | sdata->dev->name, ifmgd->bssid); | |
1272 | } | |
1273 | #endif | |
15b7b062 KV |
1274 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; |
1275 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1276 | ifmgd->ssid_len, NULL, 0); | |
1277 | goto unlock; | |
1278 | ||
1279 | } | |
1280 | ||
1281 | if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) { | |
1282 | ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; | |
1283 | ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, | |
1284 | ifmgd->ssid_len, NULL, 0); | |
f0706e82 | 1285 | } |
d0709a65 | 1286 | |
15b7b062 | 1287 | unlock: |
d0709a65 JB |
1288 | rcu_read_unlock(); |
1289 | ||
7a947080 | 1290 | if (disassoc) |
46900298 | 1291 | ieee80211_set_disassoc(sdata, true, true, |
60f8b39c | 1292 | WLAN_REASON_PREV_AUTH_NOT_VALID); |
7a947080 | 1293 | else |
46900298 | 1294 | mod_timer(&ifmgd->timer, jiffies + |
60f8b39c | 1295 | IEEE80211_MONITORING_INTERVAL); |
f0706e82 JB |
1296 | } |
1297 | ||
1298 | ||
46900298 | 1299 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1300 | { |
46900298 JB |
1301 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
1302 | ||
f698d856 | 1303 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
46900298 | 1304 | ifmgd->flags |= IEEE80211_STA_AUTHENTICATED; |
636a5d36 JM |
1305 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { |
1306 | /* Wait for SME to request association */ | |
1307 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1308 | ieee80211_recalc_idle(sdata->local); |
636a5d36 JM |
1309 | } else |
1310 | ieee80211_associate(sdata); | |
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) { | |
f0706e82 JB |
1359 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1360 | u8 algs[3]; | |
1361 | const int num_algs = ARRAY_SIZE(algs); | |
1362 | int i, pos; | |
1363 | algs[0] = algs[1] = algs[2] = 0xff; | |
46900298 | 1364 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
f0706e82 | 1365 | algs[0] = WLAN_AUTH_OPEN; |
46900298 | 1366 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) |
f0706e82 | 1367 | algs[1] = WLAN_AUTH_SHARED_KEY; |
46900298 | 1368 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) |
f0706e82 | 1369 | algs[2] = WLAN_AUTH_LEAP; |
46900298 | 1370 | if (ifmgd->auth_alg == WLAN_AUTH_OPEN) |
f0706e82 | 1371 | pos = 0; |
46900298 | 1372 | else if (ifmgd->auth_alg == WLAN_AUTH_SHARED_KEY) |
f0706e82 JB |
1373 | pos = 1; |
1374 | else | |
1375 | pos = 2; | |
1376 | for (i = 0; i < num_algs; i++) { | |
1377 | pos++; | |
1378 | if (pos >= num_algs) | |
1379 | pos = 0; | |
46900298 | 1380 | if (algs[pos] == ifmgd->auth_alg || |
f0706e82 JB |
1381 | algs[pos] == 0xff) |
1382 | continue; | |
1383 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1384 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 | 1385 | continue; |
46900298 | 1386 | ifmgd->auth_alg = algs[pos]; |
f0706e82 JB |
1387 | break; |
1388 | } | |
1389 | } | |
1390 | return; | |
1391 | } | |
1392 | ||
46900298 | 1393 | switch (ifmgd->auth_alg) { |
f0706e82 JB |
1394 | case WLAN_AUTH_OPEN: |
1395 | case WLAN_AUTH_LEAP: | |
636a5d36 | 1396 | case WLAN_AUTH_FT: |
46900298 | 1397 | ieee80211_auth_completed(sdata); |
6039f6d2 | 1398 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1399 | break; |
1400 | case WLAN_AUTH_SHARED_KEY: | |
6039f6d2 | 1401 | if (ifmgd->auth_transaction == 4) { |
46900298 | 1402 | ieee80211_auth_completed(sdata); |
6039f6d2 JM |
1403 | cfg80211_send_rx_auth(sdata->dev, (u8 *) mgmt, len); |
1404 | } else | |
46900298 | 1405 | ieee80211_auth_challenge(sdata, mgmt, len); |
f0706e82 JB |
1406 | break; |
1407 | } | |
1408 | } | |
1409 | ||
1410 | ||
f698d856 | 1411 | static void ieee80211_rx_mgmt_deauth(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.deauth.reason_code); | |
1425 | ||
46900298 | 1426 | if (ifmgd->flags & IEEE80211_STA_AUTHENTICATED) |
97c8b013 ZY |
1427 | printk(KERN_DEBUG "%s: deauthenticated (Reason: %u)\n", |
1428 | sdata->dev->name, reason_code); | |
f0706e82 | 1429 | |
636a5d36 JM |
1430 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1431 | (ifmgd->state == IEEE80211_STA_MLME_AUTHENTICATE || | |
1432 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1433 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED)) { | |
46900298 JB |
1434 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
1435 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1436 | IEEE80211_RETRY_AUTH_INTERVAL); |
1437 | } | |
1438 | ||
46900298 JB |
1439 | ieee80211_set_disassoc(sdata, true, false, 0); |
1440 | ifmgd->flags &= ~IEEE80211_STA_AUTHENTICATED; | |
53b46b84 | 1441 | cfg80211_send_deauth(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1442 | } |
1443 | ||
1444 | ||
f698d856 | 1445 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1446 | struct ieee80211_mgmt *mgmt, |
1447 | size_t len) | |
1448 | { | |
46900298 | 1449 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1450 | u16 reason_code; |
1451 | ||
f4ea83dd | 1452 | if (len < 24 + 2) |
f0706e82 | 1453 | return; |
f0706e82 | 1454 | |
46900298 | 1455 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1456 | return; |
f0706e82 JB |
1457 | |
1458 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1459 | ||
46900298 | 1460 | if (ifmgd->flags & IEEE80211_STA_ASSOCIATED) |
97c8b013 ZY |
1461 | printk(KERN_DEBUG "%s: disassociated (Reason: %u)\n", |
1462 | sdata->dev->name, reason_code); | |
f0706e82 | 1463 | |
636a5d36 JM |
1464 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
1465 | ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
46900298 JB |
1466 | ifmgd->state = IEEE80211_STA_MLME_ASSOCIATE; |
1467 | mod_timer(&ifmgd->timer, jiffies + | |
f0706e82 JB |
1468 | IEEE80211_RETRY_AUTH_INTERVAL); |
1469 | } | |
1470 | ||
46900298 | 1471 | ieee80211_set_disassoc(sdata, false, false, reason_code); |
53b46b84 | 1472 | cfg80211_send_disassoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1473 | } |
1474 | ||
1475 | ||
471b3efd | 1476 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1477 | struct ieee80211_mgmt *mgmt, |
1478 | size_t len, | |
1479 | int reassoc) | |
1480 | { | |
46900298 | 1481 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
471b3efd | 1482 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1483 | struct ieee80211_supported_band *sband; |
f0706e82 | 1484 | struct sta_info *sta; |
881d948c | 1485 | u32 rates, basic_rates; |
f0706e82 JB |
1486 | u16 capab_info, status_code, aid; |
1487 | struct ieee802_11_elems elems; | |
bda3933a | 1488 | struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
f0706e82 | 1489 | u8 *pos; |
ae5eb026 | 1490 | u32 changed = 0; |
f0706e82 | 1491 | int i, j; |
ddf4ac53 | 1492 | bool have_higher_than_11mbit = false, newsta = false; |
ae5eb026 | 1493 | u16 ap_ht_cap_flags; |
f0706e82 JB |
1494 | |
1495 | /* AssocResp and ReassocResp have identical structure, so process both | |
1496 | * of them in this function. */ | |
1497 | ||
46900298 | 1498 | if (ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1499 | return; |
f0706e82 | 1500 | |
f4ea83dd | 1501 | if (len < 24 + 6) |
f0706e82 | 1502 | return; |
f0706e82 | 1503 | |
46900298 | 1504 | if (memcmp(ifmgd->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1505 | return; |
f0706e82 JB |
1506 | |
1507 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1508 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1509 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1510 | |
0c68ae26 | 1511 | printk(KERN_DEBUG "%s: RX %sssocResp from %pM (capab=0x%x " |
f0706e82 | 1512 | "status=%d aid=%d)\n", |
0c68ae26 | 1513 | sdata->dev->name, reassoc ? "Rea" : "A", mgmt->sa, |
ddd68587 | 1514 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 | 1515 | |
63a5ab82 JM |
1516 | pos = mgmt->u.assoc_resp.variable; |
1517 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); | |
1518 | ||
1519 | if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && | |
f797eb7e JM |
1520 | elems.timeout_int && elems.timeout_int_len == 5 && |
1521 | elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) { | |
63a5ab82 | 1522 | u32 tu, ms; |
f797eb7e | 1523 | tu = get_unaligned_le32(elems.timeout_int + 1); |
63a5ab82 JM |
1524 | ms = tu * 1024 / 1000; |
1525 | printk(KERN_DEBUG "%s: AP rejected association temporarily; " | |
1526 | "comeback duration %u TU (%u ms)\n", | |
1527 | sdata->dev->name, tu, ms); | |
1528 | if (ms > IEEE80211_ASSOC_TIMEOUT) | |
46900298 | 1529 | mod_timer(&ifmgd->timer, |
63a5ab82 JM |
1530 | jiffies + msecs_to_jiffies(ms)); |
1531 | return; | |
1532 | } | |
1533 | ||
f0706e82 JB |
1534 | if (status_code != WLAN_STATUS_SUCCESS) { |
1535 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1536 | sdata->dev->name, status_code); |
8a69aa93 DD |
1537 | /* if this was a reassociation, ensure we try a "full" |
1538 | * association next time. This works around some broken APs | |
1539 | * which do not correctly reject reassociation requests. */ | |
46900298 | 1540 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
66174bbe JM |
1541 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
1542 | if (ifmgd->flags & IEEE80211_STA_EXT_SME) { | |
1543 | /* Wait for SME to decide what to do next */ | |
1544 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 1545 | ieee80211_recalc_idle(local); |
66174bbe | 1546 | } |
f0706e82 JB |
1547 | return; |
1548 | } | |
1549 | ||
1dd84aa2 JB |
1550 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1551 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1552 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1553 | aid &= ~(BIT(15) | BIT(14)); |
1554 | ||
f0706e82 JB |
1555 | if (!elems.supp_rates) { |
1556 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1557 | sdata->dev->name); |
f0706e82 JB |
1558 | return; |
1559 | } | |
1560 | ||
f698d856 | 1561 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
46900298 JB |
1562 | ifmgd->aid = aid; |
1563 | ifmgd->ap_capab = capab_info; | |
f0706e82 | 1564 | |
46900298 JB |
1565 | kfree(ifmgd->assocresp_ies); |
1566 | ifmgd->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1567 | ifmgd->assocresp_ies = kmalloc(ifmgd->assocresp_ies_len, GFP_KERNEL); | |
1568 | if (ifmgd->assocresp_ies) | |
1569 | memcpy(ifmgd->assocresp_ies, pos, ifmgd->assocresp_ies_len); | |
f0706e82 | 1570 | |
d0709a65 JB |
1571 | rcu_read_lock(); |
1572 | ||
f0706e82 | 1573 | /* Add STA entry for the AP */ |
46900298 | 1574 | sta = sta_info_get(local, ifmgd->bssid); |
f0706e82 | 1575 | if (!sta) { |
ddf4ac53 | 1576 | newsta = true; |
d0709a65 | 1577 | |
46900298 | 1578 | sta = sta_info_alloc(sdata, ifmgd->bssid, GFP_ATOMIC); |
73651ee6 JB |
1579 | if (!sta) { |
1580 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1581 | " the AP\n", sdata->dev->name); |
d0709a65 | 1582 | rcu_read_unlock(); |
f0706e82 JB |
1583 | return; |
1584 | } | |
f709fc69 | 1585 | |
60f8b39c JB |
1586 | /* update new sta with its last rx activity */ |
1587 | sta->last_rx = jiffies; | |
f709fc69 | 1588 | } |
f709fc69 | 1589 | |
60f8b39c JB |
1590 | /* |
1591 | * FIXME: Do we really need to update the sta_info's information here? | |
1592 | * We already know about the AP (we found it in our list) so it | |
1593 | * should already be filled with the right info, no? | |
1594 | * As is stands, all this is racy because typically we assume | |
1595 | * the information that is filled in here (except flags) doesn't | |
1596 | * change while a STA structure is alive. As such, it should move | |
1597 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1598 | */ | |
f709fc69 | 1599 | |
3f77316c JM |
1600 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP); |
1601 | if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) | |
1602 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); | |
05e5e883 | 1603 | |
60f8b39c JB |
1604 | rates = 0; |
1605 | basic_rates = 0; | |
1606 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
f709fc69 | 1607 | |
60f8b39c JB |
1608 | for (i = 0; i < elems.supp_rates_len; i++) { |
1609 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
d61272cb | 1610 | bool is_basic = !!(elems.supp_rates[i] & 0x80); |
f709fc69 | 1611 | |
60f8b39c JB |
1612 | if (rate > 110) |
1613 | have_higher_than_11mbit = true; | |
1614 | ||
1615 | for (j = 0; j < sband->n_bitrates; j++) { | |
d61272cb | 1616 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1617 | rates |= BIT(j); |
d61272cb TW |
1618 | if (is_basic) |
1619 | basic_rates |= BIT(j); | |
1620 | break; | |
1621 | } | |
f709fc69 | 1622 | } |
f709fc69 LCC |
1623 | } |
1624 | ||
60f8b39c JB |
1625 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
1626 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
7e0986c1 | 1627 | bool is_basic = !!(elems.ext_supp_rates[i] & 0x80); |
f0706e82 | 1628 | |
60f8b39c JB |
1629 | if (rate > 110) |
1630 | have_higher_than_11mbit = true; | |
f0706e82 | 1631 | |
60f8b39c | 1632 | for (j = 0; j < sband->n_bitrates; j++) { |
d61272cb | 1633 | if (sband->bitrates[j].bitrate == rate) { |
60f8b39c | 1634 | rates |= BIT(j); |
d61272cb TW |
1635 | if (is_basic) |
1636 | basic_rates |= BIT(j); | |
1637 | break; | |
1638 | } | |
60f8b39c | 1639 | } |
1ebebea8 | 1640 | } |
f0706e82 | 1641 | |
323ce79a | 1642 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
bda3933a | 1643 | sdata->vif.bss_conf.basic_rates = basic_rates; |
60f8b39c JB |
1644 | |
1645 | /* cf. IEEE 802.11 9.2.12 */ | |
1646 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
1647 | have_higher_than_11mbit) | |
1648 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
1649 | else | |
1650 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 1651 | |
e65c2263 S |
1652 | /* If TKIP/WEP is used, no need to parse AP's HT capabilities */ |
1653 | if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 | 1654 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, |
d9fe60de | 1655 | elems.ht_cap_elem, &sta->sta.ht_cap); |
ae5eb026 JB |
1656 | |
1657 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
f0706e82 | 1658 | |
4b7679a5 | 1659 | rate_control_rate_init(sta); |
f0706e82 | 1660 | |
46900298 | 1661 | if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) |
5394af4d JM |
1662 | set_sta_flags(sta, WLAN_STA_MFP); |
1663 | ||
ddf4ac53 | 1664 | if (elems.wmm_param) |
60f8b39c | 1665 | set_sta_flags(sta, WLAN_STA_WME); |
ddf4ac53 JB |
1666 | |
1667 | if (newsta) { | |
1668 | int err = sta_info_insert(sta); | |
1669 | if (err) { | |
1670 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
1671 | " the AP (error %d)\n", sdata->dev->name, err); | |
1672 | rcu_read_unlock(); | |
1673 | return; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | rcu_read_unlock(); | |
1678 | ||
1679 | if (elems.wmm_param) | |
46900298 | 1680 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
60f8b39c | 1681 | elems.wmm_param_len); |
aa837e1d JB |
1682 | else |
1683 | ieee80211_set_wmm_default(sdata); | |
f0706e82 | 1684 | |
ae5eb026 | 1685 | if (elems.ht_info_elem && elems.wmm_param && |
46900298 JB |
1686 | (ifmgd->flags & IEEE80211_STA_WMM_ENABLED) && |
1687 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) | |
ae5eb026 JB |
1688 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, |
1689 | ap_ht_cap_flags); | |
1690 | ||
60f8b39c JB |
1691 | /* set AID and assoc capability, |
1692 | * ieee80211_set_associated() will tell the driver */ | |
1693 | bss_conf->aid = aid; | |
1694 | bss_conf->assoc_capability = capab_info; | |
46900298 | 1695 | ieee80211_set_associated(sdata, changed); |
f0706e82 | 1696 | |
15b7b062 KV |
1697 | /* |
1698 | * initialise the time of last beacon to be the association time, | |
1699 | * otherwise beacon loss check will trigger immediately | |
1700 | */ | |
1701 | ifmgd->last_beacon = jiffies; | |
1702 | ||
46900298 | 1703 | ieee80211_associated(sdata); |
6039f6d2 | 1704 | cfg80211_send_rx_assoc(sdata->dev, (u8 *) mgmt, len); |
f0706e82 JB |
1705 | } |
1706 | ||
1707 | ||
98c8fccf JB |
1708 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
1709 | struct ieee80211_mgmt *mgmt, | |
1710 | size_t len, | |
1711 | struct ieee80211_rx_status *rx_status, | |
1712 | struct ieee802_11_elems *elems, | |
1713 | bool beacon) | |
1714 | { | |
1715 | struct ieee80211_local *local = sdata->local; | |
1716 | int freq; | |
c2b13452 | 1717 | struct ieee80211_bss *bss; |
98c8fccf | 1718 | struct ieee80211_channel *channel; |
98c8fccf JB |
1719 | |
1720 | if (elems->ds_params && elems->ds_params_len == 1) | |
1721 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
1722 | else | |
1723 | freq = rx_status->freq; | |
1724 | ||
1725 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1726 | ||
1727 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1728 | return; | |
1729 | ||
98c8fccf | 1730 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
2a519311 | 1731 | channel, beacon); |
98c8fccf JB |
1732 | if (!bss) |
1733 | return; | |
1734 | ||
c481ec97 | 1735 | if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) && |
46900298 | 1736 | (memcmp(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN) == 0)) { |
c481ec97 S |
1737 | struct ieee80211_channel_sw_ie *sw_elem = |
1738 | (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem; | |
1739 | ieee80211_process_chanswitch(sdata, sw_elem, bss); | |
1740 | } | |
1741 | ||
3e122be0 | 1742 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
1743 | } |
1744 | ||
1745 | ||
f698d856 | 1746 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1747 | struct ieee80211_mgmt *mgmt, |
1748 | size_t len, | |
1749 | struct ieee80211_rx_status *rx_status) | |
1750 | { | |
15b7b062 | 1751 | struct ieee80211_if_managed *ifmgd; |
ae6a44e3 EK |
1752 | size_t baselen; |
1753 | struct ieee802_11_elems elems; | |
1754 | ||
15b7b062 KV |
1755 | ifmgd = &sdata->u.mgd; |
1756 | ||
8e7cdbb6 TW |
1757 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
1758 | return; /* ignore ProbeResp to foreign address */ | |
1759 | ||
ae6a44e3 EK |
1760 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
1761 | if (baselen > len) | |
1762 | return; | |
1763 | ||
1764 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
1765 | &elems); | |
1766 | ||
98c8fccf | 1767 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
9859b81e RR |
1768 | |
1769 | /* direct probe may be part of the association flow */ | |
16cf438a | 1770 | if (ifmgd->state == IEEE80211_STA_MLME_DIRECT_PROBE) { |
9859b81e RR |
1771 | printk(KERN_DEBUG "%s direct probe responded\n", |
1772 | sdata->dev->name); | |
46900298 | 1773 | ieee80211_authenticate(sdata); |
9859b81e | 1774 | } |
15b7b062 KV |
1775 | |
1776 | if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) | |
1777 | ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL; | |
f0706e82 JB |
1778 | } |
1779 | ||
d91f36db JB |
1780 | /* |
1781 | * This is the canonical list of information elements we care about, | |
1782 | * the filter code also gives us all changes to the Microsoft OUI | |
1783 | * (00:50:F2) vendor IE which is used for WMM which we need to track. | |
1784 | * | |
1785 | * We implement beacon filtering in software since that means we can | |
1786 | * avoid processing the frame here and in cfg80211, and userspace | |
1787 | * will not be able to tell whether the hardware supports it or not. | |
1788 | * | |
1789 | * XXX: This list needs to be dynamic -- userspace needs to be able to | |
1790 | * add items it requires. It also needs to be able to tell us to | |
1791 | * look out for other vendor IEs. | |
1792 | */ | |
1793 | static const u64 care_about_ies = | |
1d4df3a5 JB |
1794 | (1ULL << WLAN_EID_COUNTRY) | |
1795 | (1ULL << WLAN_EID_ERP_INFO) | | |
1796 | (1ULL << WLAN_EID_CHANNEL_SWITCH) | | |
1797 | (1ULL << WLAN_EID_PWR_CONSTRAINT) | | |
1798 | (1ULL << WLAN_EID_HT_CAPABILITY) | | |
1799 | (1ULL << WLAN_EID_HT_INFORMATION); | |
d91f36db | 1800 | |
f698d856 | 1801 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1802 | struct ieee80211_mgmt *mgmt, |
1803 | size_t len, | |
1804 | struct ieee80211_rx_status *rx_status) | |
1805 | { | |
d91f36db | 1806 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 JB |
1807 | size_t baselen; |
1808 | struct ieee802_11_elems elems; | |
f698d856 | 1809 | struct ieee80211_local *local = sdata->local; |
471b3efd | 1810 | u32 changed = 0; |
d91f36db | 1811 | bool erp_valid, directed_tim = false; |
7a5158ef | 1812 | u8 erp_value = 0; |
d91f36db | 1813 | u32 ncrc; |
f0706e82 | 1814 | |
ae6a44e3 EK |
1815 | /* Process beacon from the current BSS */ |
1816 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1817 | if (baselen > len) | |
1818 | return; | |
1819 | ||
d91f36db | 1820 | if (rx_status->freq != local->hw.conf.channel->center_freq) |
f0706e82 | 1821 | return; |
f0706e82 | 1822 | |
46900298 JB |
1823 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED) || |
1824 | memcmp(ifmgd->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
f0706e82 JB |
1825 | return; |
1826 | ||
d91f36db JB |
1827 | ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); |
1828 | ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable, | |
1829 | len - baselen, &elems, | |
1830 | care_about_ies, ncrc); | |
1831 | ||
1832 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) | |
e7ec86f5 JB |
1833 | directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len, |
1834 | ifmgd->aid); | |
d91f36db JB |
1835 | |
1836 | ncrc = crc32_be(ncrc, (void *)&directed_tim, sizeof(directed_tim)); | |
1837 | ||
1838 | if (ncrc == ifmgd->beacon_crc) | |
c481ec97 | 1839 | return; |
d91f36db JB |
1840 | ifmgd->beacon_crc = ncrc; |
1841 | ||
1842 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); | |
c481ec97 | 1843 | |
46900298 | 1844 | ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param, |
fe3fa827 JB |
1845 | elems.wmm_param_len); |
1846 | ||
25c9c875 | 1847 | if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) { |
1fb3606b | 1848 | if (directed_tim) { |
572e0012 KV |
1849 | if (local->hw.conf.dynamic_ps_timeout > 0) { |
1850 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; | |
1851 | ieee80211_hw_config(local, | |
1852 | IEEE80211_CONF_CHANGE_PS); | |
1853 | ieee80211_send_nullfunc(local, sdata, 0); | |
1854 | } else { | |
1855 | local->pspolling = true; | |
1856 | ||
1857 | /* | |
1858 | * Here is assumed that the driver will be | |
1859 | * able to send ps-poll frame and receive a | |
1860 | * response even though power save mode is | |
1861 | * enabled, but some drivers might require | |
1862 | * to disable power save here. This needs | |
1863 | * to be investigated. | |
1864 | */ | |
1865 | ieee80211_send_pspoll(local, sdata); | |
1866 | } | |
a97b77b9 VN |
1867 | } |
1868 | } | |
7a5158ef JB |
1869 | |
1870 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1871 | erp_valid = true; | |
1872 | erp_value = elems.erp_info[0]; | |
1873 | } else { | |
1874 | erp_valid = false; | |
50c4afb9 | 1875 | } |
7a5158ef JB |
1876 | changed |= ieee80211_handle_bss_capability(sdata, |
1877 | le16_to_cpu(mgmt->u.beacon.capab_info), | |
1878 | erp_valid, erp_value); | |
f0706e82 | 1879 | |
d3c990fb | 1880 | |
53d6f81c | 1881 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
46900298 | 1882 | !(ifmgd->flags & IEEE80211_STA_TKIP_WEP_USED)) { |
ae5eb026 JB |
1883 | struct sta_info *sta; |
1884 | struct ieee80211_supported_band *sband; | |
1885 | u16 ap_ht_cap_flags; | |
1886 | ||
1887 | rcu_read_lock(); | |
1888 | ||
46900298 | 1889 | sta = sta_info_get(local, ifmgd->bssid); |
ae5eb026 JB |
1890 | if (!sta) { |
1891 | rcu_read_unlock(); | |
1892 | return; | |
1893 | } | |
1894 | ||
1895 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1896 | ||
1897 | ieee80211_ht_cap_ie_to_sta_ht_cap(sband, | |
1898 | elems.ht_cap_elem, &sta->sta.ht_cap); | |
1899 | ||
1900 | ap_ht_cap_flags = sta->sta.ht_cap.cap; | |
1901 | ||
1902 | rcu_read_unlock(); | |
1903 | ||
1904 | changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem, | |
1905 | ap_ht_cap_flags); | |
d3c990fb RR |
1906 | } |
1907 | ||
3f2355cb LR |
1908 | if (elems.country_elem) { |
1909 | /* Note we are only reviewing this on beacons | |
1910 | * for the BSSID we are associated to */ | |
1911 | regulatory_hint_11d(local->hw.wiphy, | |
1912 | elems.country_elem, elems.country_elem_len); | |
a8302de9 VT |
1913 | |
1914 | /* TODO: IBSS also needs this */ | |
1915 | if (elems.pwr_constr_elem) | |
1916 | ieee80211_handle_pwr_constr(sdata, | |
1917 | le16_to_cpu(mgmt->u.probe_resp.capab_info), | |
1918 | elems.pwr_constr_elem, | |
1919 | elems.pwr_constr_elem_len); | |
3f2355cb LR |
1920 | } |
1921 | ||
471b3efd | 1922 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
1923 | } |
1924 | ||
46900298 JB |
1925 | ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, |
1926 | struct sk_buff *skb, | |
1927 | struct ieee80211_rx_status *rx_status) | |
f0706e82 | 1928 | { |
f698d856 | 1929 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
1930 | struct ieee80211_mgmt *mgmt; |
1931 | u16 fc; | |
1932 | ||
1933 | if (skb->len < 24) | |
46900298 | 1934 | return RX_DROP_MONITOR; |
f0706e82 JB |
1935 | |
1936 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1937 | fc = le16_to_cpu(mgmt->frame_control); | |
1938 | ||
1939 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1940 | case IEEE80211_STYPE_PROBE_REQ: | |
1941 | case IEEE80211_STYPE_PROBE_RESP: | |
1942 | case IEEE80211_STYPE_BEACON: | |
1943 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1944 | case IEEE80211_STYPE_AUTH: | |
1945 | case IEEE80211_STYPE_ASSOC_RESP: | |
1946 | case IEEE80211_STYPE_REASSOC_RESP: | |
1947 | case IEEE80211_STYPE_DEAUTH: | |
1948 | case IEEE80211_STYPE_DISASSOC: | |
46900298 JB |
1949 | skb_queue_tail(&sdata->u.mgd.skb_queue, skb); |
1950 | queue_work(local->hw.workqueue, &sdata->u.mgd.work); | |
1951 | return RX_QUEUED; | |
f0706e82 JB |
1952 | } |
1953 | ||
46900298 | 1954 | return RX_DROP_MONITOR; |
f0706e82 JB |
1955 | } |
1956 | ||
f698d856 | 1957 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1958 | struct sk_buff *skb) |
1959 | { | |
1960 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
1961 | struct ieee80211_mgmt *mgmt; |
1962 | u16 fc; | |
1963 | ||
f0706e82 JB |
1964 | rx_status = (struct ieee80211_rx_status *) skb->cb; |
1965 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1966 | fc = le16_to_cpu(mgmt->frame_control); | |
1967 | ||
46900298 JB |
1968 | switch (fc & IEEE80211_FCTL_STYPE) { |
1969 | case IEEE80211_STYPE_PROBE_RESP: | |
1970 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, | |
1971 | rx_status); | |
1972 | break; | |
1973 | case IEEE80211_STYPE_BEACON: | |
1974 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, | |
1975 | rx_status); | |
1976 | break; | |
1977 | case IEEE80211_STYPE_AUTH: | |
1978 | ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); | |
1979 | break; | |
1980 | case IEEE80211_STYPE_ASSOC_RESP: | |
1981 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 0); | |
1982 | break; | |
1983 | case IEEE80211_STYPE_REASSOC_RESP: | |
1984 | ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, 1); | |
1985 | break; | |
1986 | case IEEE80211_STYPE_DEAUTH: | |
1987 | ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); | |
1988 | break; | |
1989 | case IEEE80211_STYPE_DISASSOC: | |
1990 | ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); | |
1991 | break; | |
f0706e82 JB |
1992 | } |
1993 | ||
1994 | kfree_skb(skb); | |
1995 | } | |
1996 | ||
9c6bd790 | 1997 | static void ieee80211_sta_timer(unsigned long data) |
f0706e82 | 1998 | { |
60f8b39c JB |
1999 | struct ieee80211_sub_if_data *sdata = |
2000 | (struct ieee80211_sub_if_data *) data; | |
46900298 | 2001 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2002 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2003 | |
46900298 JB |
2004 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2005 | queue_work(local->hw.workqueue, &ifmgd->work); | |
f0706e82 JB |
2006 | } |
2007 | ||
46900298 | 2008 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2009 | { |
46900298 | 2010 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2011 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 2012 | |
24487981 JB |
2013 | /* Reset own TSF to allow time synchronization work. */ |
2014 | drv_reset_tsf(local); | |
f0706e82 | 2015 | |
46900298 | 2016 | ifmgd->wmm_last_param_set = -1; /* allow any WMM update */ |
f0706e82 JB |
2017 | |
2018 | ||
46900298 JB |
2019 | if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_OPEN) |
2020 | ifmgd->auth_alg = WLAN_AUTH_OPEN; | |
2021 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2022 | ifmgd->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2023 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2024 | ifmgd->auth_alg = WLAN_AUTH_LEAP; | |
636a5d36 JM |
2025 | else if (ifmgd->auth_algs & IEEE80211_AUTH_ALG_FT) |
2026 | ifmgd->auth_alg = WLAN_AUTH_FT; | |
f0706e82 | 2027 | else |
46900298 JB |
2028 | ifmgd->auth_alg = WLAN_AUTH_OPEN; |
2029 | ifmgd->auth_transaction = -1; | |
2030 | ifmgd->flags &= ~IEEE80211_STA_ASSOCIATED; | |
2031 | ifmgd->assoc_scan_tries = 0; | |
2032 | ifmgd->direct_probe_tries = 0; | |
2033 | ifmgd->auth_tries = 0; | |
2034 | ifmgd->assoc_tries = 0; | |
24e64622 | 2035 | netif_tx_stop_all_queues(sdata->dev); |
f698d856 | 2036 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
2037 | } |
2038 | ||
46900298 | 2039 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 2040 | { |
46900298 | 2041 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f698d856 | 2042 | struct ieee80211_local *local = sdata->local; |
c2b13452 | 2043 | struct ieee80211_bss *bss; |
46900298 JB |
2044 | u8 *bssid = ifmgd->bssid, *ssid = ifmgd->ssid; |
2045 | u8 ssid_len = ifmgd->ssid_len; | |
00d3f14c JB |
2046 | u16 capa_mask = WLAN_CAPABILITY_ESS; |
2047 | u16 capa_val = WLAN_CAPABILITY_ESS; | |
2048 | struct ieee80211_channel *chan = local->oper_channel; | |
2049 | ||
636a5d36 JM |
2050 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) && |
2051 | ifmgd->flags & (IEEE80211_STA_AUTO_SSID_SEL | | |
00d3f14c JB |
2052 | IEEE80211_STA_AUTO_BSSID_SEL | |
2053 | IEEE80211_STA_AUTO_CHANNEL_SEL)) { | |
2054 | capa_mask |= WLAN_CAPABILITY_PRIVACY; | |
2055 | if (sdata->default_key) | |
2056 | capa_val |= WLAN_CAPABILITY_PRIVACY; | |
f0706e82 | 2057 | } |
9d139c81 | 2058 | |
46900298 | 2059 | if (ifmgd->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) |
00d3f14c JB |
2060 | chan = NULL; |
2061 | ||
46900298 | 2062 | if (ifmgd->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
00d3f14c JB |
2063 | bssid = NULL; |
2064 | ||
46900298 | 2065 | if (ifmgd->flags & IEEE80211_STA_AUTO_SSID_SEL) { |
00d3f14c JB |
2066 | ssid = NULL; |
2067 | ssid_len = 0; | |
2068 | } | |
2069 | ||
2070 | bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan, | |
2071 | bssid, ssid, ssid_len, | |
2072 | capa_mask, capa_val); | |
2073 | ||
2074 | if (bss) { | |
2075 | ieee80211_set_freq(sdata, bss->cbss.channel->center_freq); | |
46900298 | 2076 | if (!(ifmgd->flags & IEEE80211_STA_SSID_SET)) |
00d3f14c JB |
2077 | ieee80211_sta_set_ssid(sdata, bss->ssid, |
2078 | bss->ssid_len); | |
2079 | ieee80211_sta_set_bssid(sdata, bss->cbss.bssid); | |
2080 | ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len, | |
2081 | bss->supp_rates); | |
46900298 JB |
2082 | if (sdata->u.mgd.mfp == IEEE80211_MFP_REQUIRED) |
2083 | sdata->u.mgd.flags |= IEEE80211_STA_MFP_ENABLED; | |
fdfacf0a | 2084 | else |
46900298 | 2085 | sdata->u.mgd.flags &= ~IEEE80211_STA_MFP_ENABLED; |
f0706e82 | 2086 | |
9c6bd790 JB |
2087 | /* Send out direct probe if no probe resp was received or |
2088 | * the one we have is outdated | |
2089 | */ | |
00d3f14c JB |
2090 | if (!bss->last_probe_resp || |
2091 | time_after(jiffies, bss->last_probe_resp | |
9c6bd790 | 2092 | + IEEE80211_SCAN_RESULT_EXPIRE)) |
46900298 | 2093 | ifmgd->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
9c6bd790 | 2094 | else |
46900298 | 2095 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 | 2096 | |
00d3f14c | 2097 | ieee80211_rx_bss_put(local, bss); |
46900298 | 2098 | ieee80211_sta_reset_auth(sdata); |
9c6bd790 JB |
2099 | return 0; |
2100 | } else { | |
46900298 | 2101 | if (ifmgd->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
f3b85252 | 2102 | |
46900298 | 2103 | ifmgd->assoc_scan_tries++; |
af88b907 | 2104 | |
f3b85252 JB |
2105 | ieee80211_request_internal_scan(sdata, ifmgd->ssid, |
2106 | ssid_len); | |
af88b907 | 2107 | |
46900298 JB |
2108 | ifmgd->state = IEEE80211_STA_MLME_AUTHENTICATE; |
2109 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
e374055a | 2110 | } else { |
46900298 JB |
2111 | ifmgd->assoc_scan_tries = 0; |
2112 | ifmgd->state = IEEE80211_STA_MLME_DISABLED; | |
5cff20e6 | 2113 | ieee80211_recalc_idle(local); |
e374055a | 2114 | } |
9c6bd790 JB |
2115 | } |
2116 | return -1; | |
2117 | } | |
2118 | ||
2119 | ||
2120 | static void ieee80211_sta_work(struct work_struct *work) | |
2121 | { | |
2122 | struct ieee80211_sub_if_data *sdata = | |
46900298 | 2123 | container_of(work, struct ieee80211_sub_if_data, u.mgd.work); |
9c6bd790 | 2124 | struct ieee80211_local *local = sdata->local; |
46900298 | 2125 | struct ieee80211_if_managed *ifmgd; |
9c6bd790 JB |
2126 | struct sk_buff *skb; |
2127 | ||
2128 | if (!netif_running(sdata->dev)) | |
2129 | return; | |
2130 | ||
c2b13452 | 2131 | if (local->sw_scanning || local->hw_scanning) |
9c6bd790 JB |
2132 | return; |
2133 | ||
46900298 | 2134 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2135 | return; |
46900298 | 2136 | ifmgd = &sdata->u.mgd; |
f0706e82 | 2137 | |
46900298 | 2138 | while ((skb = skb_dequeue(&ifmgd->skb_queue))) |
9c6bd790 JB |
2139 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
2140 | ||
46900298 JB |
2141 | if (ifmgd->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
2142 | ifmgd->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
2143 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE && | |
2144 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifmgd->request)) { | |
f3b85252 JB |
2145 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
2146 | round_jiffies_relative(0)); | |
9c6bd790 | 2147 | return; |
f0706e82 JB |
2148 | } |
2149 | ||
46900298 JB |
2150 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request)) { |
2151 | if (ieee80211_sta_config_auth(sdata)) | |
9c6bd790 | 2152 | return; |
46900298 JB |
2153 | clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); |
2154 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request)) | |
9c6bd790 | 2155 | return; |
d6f2da5b | 2156 | |
5cff20e6 JB |
2157 | ieee80211_recalc_idle(local); |
2158 | ||
46900298 | 2159 | switch (ifmgd->state) { |
9c6bd790 JB |
2160 | case IEEE80211_STA_MLME_DISABLED: |
2161 | break; | |
2162 | case IEEE80211_STA_MLME_DIRECT_PROBE: | |
46900298 | 2163 | ieee80211_direct_probe(sdata); |
9c6bd790 JB |
2164 | break; |
2165 | case IEEE80211_STA_MLME_AUTHENTICATE: | |
46900298 | 2166 | ieee80211_authenticate(sdata); |
9c6bd790 JB |
2167 | break; |
2168 | case IEEE80211_STA_MLME_ASSOCIATE: | |
46900298 | 2169 | ieee80211_associate(sdata); |
9c6bd790 JB |
2170 | break; |
2171 | case IEEE80211_STA_MLME_ASSOCIATED: | |
46900298 | 2172 | ieee80211_associated(sdata); |
9c6bd790 JB |
2173 | break; |
2174 | default: | |
2175 | WARN_ON(1); | |
2176 | break; | |
2177 | } | |
2178 | ||
46900298 | 2179 | if (ieee80211_privacy_mismatch(sdata)) { |
9c6bd790 JB |
2180 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
2181 | "mixed-cell disabled - disassociate\n", sdata->dev->name); | |
2182 | ||
46900298 | 2183 | ieee80211_set_disassoc(sdata, false, true, |
9c6bd790 JB |
2184 | WLAN_REASON_UNSPECIFIED); |
2185 | } | |
f0706e82 JB |
2186 | } |
2187 | ||
9c6bd790 JB |
2188 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
2189 | { | |
ad935687 KV |
2190 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
2191 | /* | |
2192 | * Need to update last_beacon to avoid beacon loss | |
2193 | * test to trigger. | |
2194 | */ | |
2195 | sdata->u.mgd.last_beacon = jiffies; | |
2196 | ||
2197 | ||
9c6bd790 | 2198 | queue_work(sdata->local->hw.workqueue, |
46900298 | 2199 | &sdata->u.mgd.work); |
ad935687 | 2200 | } |
9c6bd790 | 2201 | } |
f0706e82 | 2202 | |
9c6bd790 JB |
2203 | /* interface setup */ |
2204 | void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) | |
f0706e82 | 2205 | { |
46900298 | 2206 | struct ieee80211_if_managed *ifmgd; |
bbbdff9e | 2207 | u32 hw_flags; |
988c0f72 | 2208 | |
46900298 JB |
2209 | ifmgd = &sdata->u.mgd; |
2210 | INIT_WORK(&ifmgd->work, ieee80211_sta_work); | |
2211 | INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work); | |
04de8381 | 2212 | INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work); |
46900298 | 2213 | setup_timer(&ifmgd->timer, ieee80211_sta_timer, |
c481ec97 | 2214 | (unsigned long) sdata); |
46900298 | 2215 | setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer, |
9c6bd790 | 2216 | (unsigned long) sdata); |
46900298 | 2217 | skb_queue_head_init(&ifmgd->skb_queue); |
9c6bd790 | 2218 | |
46900298 JB |
2219 | ifmgd->capab = WLAN_CAPABILITY_ESS; |
2220 | ifmgd->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
9c6bd790 | 2221 | IEEE80211_AUTH_ALG_SHARED_KEY; |
46900298 | 2222 | ifmgd->flags |= IEEE80211_STA_CREATE_IBSS | |
9c6bd790 JB |
2223 | IEEE80211_STA_AUTO_BSSID_SEL | |
2224 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
176be728 | 2225 | if (sdata->local->hw.queues >= 4) |
46900298 | 2226 | ifmgd->flags |= IEEE80211_STA_WMM_ENABLED; |
bbbdff9e JB |
2227 | |
2228 | hw_flags = sdata->local->hw.flags; | |
2229 | ||
2230 | if (hw_flags & IEEE80211_HW_SUPPORTS_PS) { | |
2231 | ifmgd->powersave = CONFIG_MAC80211_DEFAULT_PS_VALUE; | |
2232 | sdata->local->hw.conf.dynamic_ps_timeout = 500; | |
2233 | } | |
f0706e82 JB |
2234 | } |
2235 | ||
9c6bd790 | 2236 | /* configuration hooks */ |
46900298 | 2237 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata) |
60f8b39c | 2238 | { |
46900298 | 2239 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
60f8b39c | 2240 | struct ieee80211_local *local = sdata->local; |
60f8b39c | 2241 | |
46900298 | 2242 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) |
9c6bd790 | 2243 | return; |
60f8b39c | 2244 | |
46900298 | 2245 | if ((ifmgd->flags & (IEEE80211_STA_BSSID_SET | |
9c6bd790 | 2246 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
46900298 | 2247 | (ifmgd->flags & (IEEE80211_STA_SSID_SET | |
9c6bd790 | 2248 | IEEE80211_STA_AUTO_SSID_SEL))) { |
60f8b39c | 2249 | |
46900298 JB |
2250 | if (ifmgd->state == IEEE80211_STA_MLME_ASSOCIATED) |
2251 | ieee80211_set_disassoc(sdata, true, true, | |
9c6bd790 | 2252 | WLAN_REASON_DEAUTH_LEAVING); |
60f8b39c | 2253 | |
636a5d36 JM |
2254 | if (!(ifmgd->flags & IEEE80211_STA_EXT_SME) || |
2255 | ifmgd->state != IEEE80211_STA_MLME_ASSOCIATE) | |
2256 | set_bit(IEEE80211_STA_REQ_AUTH, &ifmgd->request); | |
2257 | else if (ifmgd->flags & IEEE80211_STA_EXT_SME) | |
2258 | set_bit(IEEE80211_STA_REQ_RUN, &ifmgd->request); | |
46900298 | 2259 | queue_work(local->hw.workqueue, &ifmgd->work); |
9c6bd790 JB |
2260 | } |
2261 | } | |
60f8b39c | 2262 | |
79f6440c AF |
2263 | int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata) |
2264 | { | |
2265 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
2266 | ||
79f6440c AF |
2267 | if (ifmgd->ssid_len) |
2268 | ifmgd->flags |= IEEE80211_STA_SSID_SET; | |
2269 | else | |
2270 | ifmgd->flags &= ~IEEE80211_STA_SSID_SET; | |
2271 | ||
2272 | return 0; | |
2273 | } | |
2274 | ||
9c6bd790 JB |
2275 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
2276 | { | |
46900298 | 2277 | struct ieee80211_if_managed *ifmgd; |
60f8b39c | 2278 | |
9c6bd790 JB |
2279 | if (len > IEEE80211_MAX_SSID_LEN) |
2280 | return -EINVAL; | |
2281 | ||
46900298 | 2282 | ifmgd = &sdata->u.mgd; |
9c6bd790 | 2283 | |
46900298 | 2284 | if (ifmgd->ssid_len != len || memcmp(ifmgd->ssid, ssid, len) != 0) { |
a299542e JM |
2285 | /* |
2286 | * Do not use reassociation if SSID is changed (different ESS). | |
2287 | */ | |
2288 | ifmgd->flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
46900298 JB |
2289 | memset(ifmgd->ssid, 0, sizeof(ifmgd->ssid)); |
2290 | memcpy(ifmgd->ssid, ssid, len); | |
2291 | ifmgd->ssid_len = len; | |
60f8b39c | 2292 | } |
60f8b39c | 2293 | |
79f6440c | 2294 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2295 | } |
2296 | ||
2297 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) | |
2298 | { | |
46900298 JB |
2299 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
2300 | memcpy(ssid, ifmgd->ssid, ifmgd->ssid_len); | |
2301 | *len = ifmgd->ssid_len; | |
9c6bd790 JB |
2302 | return 0; |
2303 | } | |
2304 | ||
2305 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) | |
2306 | { | |
46900298 | 2307 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2308 | |
dfe67012 | 2309 | if (is_valid_ether_addr(bssid)) { |
46900298 JB |
2310 | memcpy(ifmgd->bssid, bssid, ETH_ALEN); |
2311 | ifmgd->flags |= IEEE80211_STA_BSSID_SET; | |
dfe67012 | 2312 | } else { |
46900298 JB |
2313 | memset(ifmgd->bssid, 0, ETH_ALEN); |
2314 | ifmgd->flags &= ~IEEE80211_STA_BSSID_SET; | |
dfe67012 AF |
2315 | } |
2316 | ||
2d0ddec5 JB |
2317 | if (netif_running(sdata->dev)) |
2318 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID); | |
60f8b39c | 2319 | |
79f6440c | 2320 | return ieee80211_sta_commit(sdata); |
9c6bd790 JB |
2321 | } |
2322 | ||
636a5d36 JM |
2323 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, |
2324 | const char *ie, size_t len) | |
9c6bd790 | 2325 | { |
46900298 | 2326 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
9c6bd790 | 2327 | |
46900298 | 2328 | kfree(ifmgd->extra_ie); |
9c6bd790 | 2329 | if (len == 0) { |
46900298 JB |
2330 | ifmgd->extra_ie = NULL; |
2331 | ifmgd->extra_ie_len = 0; | |
60f8b39c | 2332 | return 0; |
60f8b39c | 2333 | } |
46900298 JB |
2334 | ifmgd->extra_ie = kmalloc(len, GFP_KERNEL); |
2335 | if (!ifmgd->extra_ie) { | |
2336 | ifmgd->extra_ie_len = 0; | |
9c6bd790 JB |
2337 | return -ENOMEM; |
2338 | } | |
46900298 JB |
2339 | memcpy(ifmgd->extra_ie, ie, len); |
2340 | ifmgd->extra_ie_len = len; | |
9c6bd790 | 2341 | return 0; |
60f8b39c JB |
2342 | } |
2343 | ||
f698d856 | 2344 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2345 | { |
f4ea83dd | 2346 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 2347 | sdata->dev->name, reason); |
f0706e82 | 2348 | |
46900298 | 2349 | ieee80211_set_disassoc(sdata, true, true, reason); |
f0706e82 JB |
2350 | return 0; |
2351 | } | |
2352 | ||
f698d856 | 2353 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 2354 | { |
46900298 | 2355 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
f0706e82 | 2356 | |
f4ea83dd | 2357 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 2358 | sdata->dev->name, reason); |
f0706e82 | 2359 | |
46900298 JB |
2360 | if (!(ifmgd->flags & IEEE80211_STA_ASSOCIATED)) |
2361 | return -ENOLINK; | |
f0706e82 | 2362 | |
46900298 | 2363 | ieee80211_set_disassoc(sdata, false, true, reason); |
f0706e82 JB |
2364 | return 0; |
2365 | } | |
84363e6e | 2366 | |
9c6bd790 JB |
2367 | /* scan finished notification */ |
2368 | void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) | |
2369 | { | |
2370 | struct ieee80211_sub_if_data *sdata = local->scan_sdata; | |
9c6bd790 JB |
2371 | |
2372 | /* Restart STA timers */ | |
2373 | rcu_read_lock(); | |
2374 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2375 | ieee80211_restart_sta_timer(sdata); | |
2376 | rcu_read_unlock(); | |
2377 | } | |
10f644a4 JB |
2378 | |
2379 | int ieee80211_max_network_latency(struct notifier_block *nb, | |
2380 | unsigned long data, void *dummy) | |
2381 | { | |
2382 | s32 latency_usec = (s32) data; | |
2383 | struct ieee80211_local *local = | |
2384 | container_of(nb, struct ieee80211_local, | |
2385 | network_latency_notifier); | |
2386 | ||
2387 | mutex_lock(&local->iflist_mtx); | |
2388 | ieee80211_recalc_ps(local, latency_usec); | |
2389 | mutex_unlock(&local->iflist_mtx); | |
2390 | ||
2391 | return 0; | |
2392 | } |