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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
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 | ||
14 | /* TODO: | |
f0706e82 JB |
15 | * order BSS list by RSSI(?) ("quality of AP") |
16 | * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, | |
17 | * SSID) | |
18 | */ | |
5b323edb | 19 | #include <linux/delay.h> |
f0706e82 JB |
20 | #include <linux/if_ether.h> |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/if_arp.h> | |
24 | #include <linux/wireless.h> | |
25 | #include <linux/random.h> | |
26 | #include <linux/etherdevice.h> | |
d0709a65 | 27 | #include <linux/rtnetlink.h> |
f0706e82 JB |
28 | #include <net/iw_handler.h> |
29 | #include <asm/types.h> | |
f0706e82 JB |
30 | |
31 | #include <net/mac80211.h> | |
32 | #include "ieee80211_i.h" | |
2c8dccc7 JB |
33 | #include "rate.h" |
34 | #include "led.h" | |
f709fc69 | 35 | #include "mesh.h" |
f0706e82 | 36 | |
6042a3e3 | 37 | #define IEEE80211_ASSOC_SCANS_MAX_TRIES 2 |
f0706e82 JB |
38 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) |
39 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
40 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
41 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
42 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
f709fc69 | 43 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
f0706e82 JB |
44 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) |
45 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
46 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
47 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
872ba533 | 48 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
f0706e82 JB |
49 | |
50 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
51 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
52 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
53 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
54 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
55 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
f709fc69 | 56 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
f0706e82 JB |
57 | |
58 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
59 | ||
60 | ||
f0706e82 JB |
61 | #define ERP_INFO_USE_PROTECTION BIT(1) |
62 | ||
9c80d3dc | 63 | /* mgmt header + 1 byte category code */ |
9f985b0e RR |
64 | #define IEEE80211_MIN_ACTION_SIZE (24 + 1) |
65 | ||
66 | #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 | |
67 | #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C | |
68 | #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 | |
688b88a4 RR |
69 | #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 |
70 | #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 | |
9f985b0e | 71 | |
07db2183 RR |
72 | /* next values represent the buffer size for A-MPDU frame. |
73 | * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ | |
74 | #define IEEE80211_MIN_AMPDU_BUF 0x8 | |
75 | #define IEEE80211_MAX_AMPDU_BUF 0x40 | |
76 | ||
f698d856 | 77 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
78 | u8 *ssid, size_t ssid_len); |
79 | static struct ieee80211_sta_bss * | |
f698d856 | 80 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 81 | u8 *ssid, u8 ssid_len); |
3e122be0 | 82 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 | 83 | struct ieee80211_sta_bss *bss); |
f698d856 | 84 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 | 85 | struct ieee80211_if_sta *ifsta); |
f698d856 JBG |
86 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata); |
87 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *sdata, | |
f0706e82 | 88 | u8 *ssid, size_t ssid_len); |
f698d856 | 89 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 | 90 | struct ieee80211_if_sta *ifsta); |
712590de | 91 | static void sta_rx_agg_session_timer_expired(unsigned long data); |
f0706e82 JB |
92 | |
93 | ||
43ac2ca3 JM |
94 | static u8 * ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie) |
95 | { | |
96 | u8 *end, *pos; | |
97 | ||
98 | pos = bss->ies; | |
99 | if (pos == NULL) | |
100 | return NULL; | |
101 | end = pos + bss->ies_len; | |
102 | ||
103 | while (pos + 1 < end) { | |
104 | if (pos + 2 + pos[1] > end) | |
105 | break; | |
106 | if (pos[0] == ie) | |
107 | return pos; | |
108 | pos += 2 + pos[1]; | |
109 | } | |
110 | ||
111 | return NULL; | |
112 | } | |
113 | ||
114 | ||
f0706e82 JB |
115 | static int ecw2cw(int ecw) |
116 | { | |
ac2bf324 | 117 | return (1 << ecw) - 1; |
f0706e82 JB |
118 | } |
119 | ||
e2839d8f | 120 | |
f698d856 | 121 | static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata, |
e2839d8f VK |
122 | struct ieee80211_sta_bss *bss, |
123 | int ibss) | |
124 | { | |
e2839d8f VK |
125 | struct ieee80211_local *local = sdata->local; |
126 | int i, have_higher_than_11mbit = 0; | |
127 | ||
128 | ||
129 | /* cf. IEEE 802.11 9.2.12 */ | |
130 | for (i = 0; i < bss->supp_rates_len; i++) | |
131 | if ((bss->supp_rates[i] & 0x7f) * 5 > 110) | |
132 | have_higher_than_11mbit = 1; | |
133 | ||
134 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
135 | have_higher_than_11mbit) | |
136 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
137 | else | |
138 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
139 | ||
140 | ||
141 | if (local->ops->conf_tx) { | |
142 | struct ieee80211_tx_queue_params qparam; | |
e2839d8f VK |
143 | |
144 | memset(&qparam, 0, sizeof(qparam)); | |
145 | ||
146 | qparam.aifs = 2; | |
147 | ||
148 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
149 | !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)) | |
150 | qparam.cw_min = 31; | |
151 | else | |
152 | qparam.cw_min = 15; | |
153 | ||
154 | qparam.cw_max = 1023; | |
155 | qparam.txop = 0; | |
156 | ||
e100bb64 JB |
157 | for (i = 0; i < local_to_hw(local)->queues; i++) |
158 | local->ops->conf_tx(local_to_hw(local), i, &qparam); | |
e2839d8f VK |
159 | } |
160 | } | |
161 | ||
f698d856 | 162 | static void ieee80211_sta_wmm_params(struct ieee80211_local *local, |
f0706e82 JB |
163 | struct ieee80211_if_sta *ifsta, |
164 | u8 *wmm_param, size_t wmm_param_len) | |
165 | { | |
f0706e82 JB |
166 | struct ieee80211_tx_queue_params params; |
167 | size_t left; | |
168 | int count; | |
169 | u8 *pos; | |
170 | ||
3434fbd3 JB |
171 | if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED)) |
172 | return; | |
173 | ||
174 | if (!wmm_param) | |
175 | return; | |
176 | ||
f0706e82 JB |
177 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) |
178 | return; | |
179 | count = wmm_param[6] & 0x0f; | |
180 | if (count == ifsta->wmm_last_param_set) | |
181 | return; | |
182 | ifsta->wmm_last_param_set = count; | |
183 | ||
184 | pos = wmm_param + 8; | |
185 | left = wmm_param_len - 8; | |
186 | ||
187 | memset(¶ms, 0, sizeof(params)); | |
188 | ||
189 | if (!local->ops->conf_tx) | |
190 | return; | |
191 | ||
192 | local->wmm_acm = 0; | |
193 | for (; left >= 4; left -= 4, pos += 4) { | |
194 | int aci = (pos[0] >> 5) & 0x03; | |
195 | int acm = (pos[0] >> 4) & 0x01; | |
196 | int queue; | |
197 | ||
198 | switch (aci) { | |
199 | case 1: | |
e100bb64 | 200 | queue = 3; |
988c0f72 | 201 | if (acm) |
f0706e82 | 202 | local->wmm_acm |= BIT(0) | BIT(3); |
f0706e82 JB |
203 | break; |
204 | case 2: | |
e100bb64 | 205 | queue = 1; |
988c0f72 | 206 | if (acm) |
f0706e82 | 207 | local->wmm_acm |= BIT(4) | BIT(5); |
f0706e82 JB |
208 | break; |
209 | case 3: | |
e100bb64 | 210 | queue = 0; |
988c0f72 | 211 | if (acm) |
f0706e82 | 212 | local->wmm_acm |= BIT(6) | BIT(7); |
f0706e82 JB |
213 | break; |
214 | case 0: | |
215 | default: | |
e100bb64 | 216 | queue = 2; |
988c0f72 | 217 | if (acm) |
f0706e82 | 218 | local->wmm_acm |= BIT(1) | BIT(2); |
f0706e82 JB |
219 | break; |
220 | } | |
221 | ||
222 | params.aifs = pos[0] & 0x0f; | |
223 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
224 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
f434b2d1 | 225 | params.txop = get_unaligned_le16(pos + 2); |
f4ea83dd | 226 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
f0706e82 | 227 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " |
3330d7be | 228 | "cWmin=%d cWmax=%d txop=%d\n", |
f698d856 | 229 | local->mdev->name, queue, aci, acm, params.aifs, params.cw_min, |
3330d7be JB |
230 | params.cw_max, params.txop); |
231 | #endif | |
f0706e82 JB |
232 | /* TODO: handle ACM (block TX, fallback to next lowest allowed |
233 | * AC for now) */ | |
234 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
235 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
f698d856 | 236 | "parameters for queue %d\n", local->mdev->name, queue); |
f0706e82 JB |
237 | } |
238 | } | |
239 | } | |
240 | ||
50c4afb9 JL |
241 | static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata, |
242 | bool use_protection, | |
243 | bool use_short_preamble) | |
5628221c | 244 | { |
471b3efd | 245 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
ebd74487 | 246 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c | 247 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
0795af57 | 248 | DECLARE_MAC_BUF(mac); |
ebd74487 | 249 | #endif |
471b3efd | 250 | u32 changed = 0; |
5628221c | 251 | |
471b3efd | 252 | if (use_protection != bss_conf->use_cts_prot) { |
f4ea83dd | 253 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
5628221c DD |
254 | if (net_ratelimit()) { |
255 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 256 | "%s)\n", |
471b3efd | 257 | sdata->dev->name, |
5628221c | 258 | use_protection ? "enabled" : "disabled", |
0795af57 | 259 | print_mac(mac, ifsta->bssid)); |
5628221c | 260 | } |
f4ea83dd | 261 | #endif |
471b3efd JB |
262 | bss_conf->use_cts_prot = use_protection; |
263 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 264 | } |
7e9ed188 | 265 | |
d43c7b37 | 266 | if (use_short_preamble != bss_conf->use_short_preamble) { |
f4ea83dd | 267 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
7e9ed188 DD |
268 | if (net_ratelimit()) { |
269 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 270 | " (BSSID=%s)\n", |
471b3efd | 271 | sdata->dev->name, |
d43c7b37 | 272 | use_short_preamble ? "short" : "long", |
0795af57 | 273 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 274 | } |
f4ea83dd | 275 | #endif |
d43c7b37 | 276 | bss_conf->use_short_preamble = use_short_preamble; |
471b3efd | 277 | changed |= BSS_CHANGED_ERP_PREAMBLE; |
7e9ed188 | 278 | } |
d9430a32 | 279 | |
471b3efd | 280 | return changed; |
5628221c DD |
281 | } |
282 | ||
50c4afb9 JL |
283 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
284 | u8 erp_value) | |
285 | { | |
286 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
287 | bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0; | |
288 | ||
289 | return ieee80211_handle_protect_preamb(sdata, | |
290 | use_protection, use_short_preamble); | |
291 | } | |
292 | ||
293 | static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata, | |
294 | struct ieee80211_sta_bss *bss) | |
295 | { | |
296 | u32 changed = 0; | |
297 | ||
298 | if (bss->has_erp_value) | |
299 | changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value); | |
300 | else { | |
301 | u16 capab = bss->capability; | |
302 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
303 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
304 | } | |
305 | ||
306 | return changed; | |
307 | } | |
308 | ||
c7153508 RR |
309 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
310 | struct ieee80211_ht_info *ht_info) | |
311 | { | |
312 | ||
313 | if (ht_info == NULL) | |
314 | return -EINVAL; | |
315 | ||
316 | memset(ht_info, 0, sizeof(*ht_info)); | |
317 | ||
318 | if (ht_cap_ie) { | |
319 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
320 | ||
321 | ht_info->ht_supported = 1; | |
322 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
323 | ht_info->ampdu_factor = | |
324 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
325 | ht_info->ampdu_density = | |
326 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
327 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
328 | } else | |
329 | ht_info->ht_supported = 0; | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
335 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
336 | struct ieee80211_ht_bss_info *bss_info) | |
337 | { | |
338 | if (bss_info == NULL) | |
339 | return -EINVAL; | |
340 | ||
341 | memset(bss_info, 0, sizeof(*bss_info)); | |
342 | ||
343 | if (ht_add_info_ie) { | |
344 | u16 op_mode; | |
345 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
346 | ||
347 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
348 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
349 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
350 | } | |
351 | ||
352 | return 0; | |
353 | } | |
5628221c | 354 | |
f5e5bf25 TW |
355 | static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata, |
356 | struct ieee80211_if_sta *ifsta) | |
357 | { | |
358 | union iwreq_data wrqu; | |
359 | memset(&wrqu, 0, sizeof(wrqu)); | |
360 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) | |
361 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
362 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
363 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); | |
364 | } | |
365 | ||
f698d856 | 366 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
367 | struct ieee80211_if_sta *ifsta) |
368 | { | |
f0706e82 JB |
369 | union iwreq_data wrqu; |
370 | ||
f0706e82 | 371 | if (ifsta->assocreq_ies) { |
087d833e JM |
372 | memset(&wrqu, 0, sizeof(wrqu)); |
373 | wrqu.data.length = ifsta->assocreq_ies_len; | |
b171e19e | 374 | wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu, |
087d833e | 375 | ifsta->assocreq_ies); |
f0706e82 | 376 | } |
087d833e JM |
377 | if (ifsta->assocresp_ies) { |
378 | memset(&wrqu, 0, sizeof(wrqu)); | |
379 | wrqu.data.length = ifsta->assocresp_ies_len; | |
b171e19e | 380 | wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu, |
087d833e | 381 | ifsta->assocresp_ies); |
f0706e82 | 382 | } |
f0706e82 JB |
383 | } |
384 | ||
385 | ||
f698d856 | 386 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
f5e5bf25 | 387 | struct ieee80211_if_sta *ifsta) |
f0706e82 | 388 | { |
471b3efd | 389 | struct ieee80211_local *local = sdata->local; |
38668c05 | 390 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
471b3efd | 391 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 392 | |
f5e5bf25 | 393 | struct ieee80211_sta_bss *bss; |
d6f2da5b | 394 | |
f5e5bf25 | 395 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; |
5628221c | 396 | |
f5e5bf25 TW |
397 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
398 | return; | |
21c0cbe7 | 399 | |
f5e5bf25 TW |
400 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
401 | conf->channel->center_freq, | |
402 | ifsta->ssid, ifsta->ssid_len); | |
403 | if (bss) { | |
404 | /* set timing information */ | |
405 | sdata->bss_conf.beacon_int = bss->beacon_int; | |
406 | sdata->bss_conf.timestamp = bss->timestamp; | |
407 | sdata->bss_conf.dtim_period = bss->dtim_period; | |
21c0cbe7 | 408 | |
f5e5bf25 | 409 | changed |= ieee80211_handle_bss_capability(sdata, bss); |
5628221c | 410 | |
f5e5bf25 TW |
411 | ieee80211_rx_bss_put(local, bss); |
412 | } | |
38668c05 | 413 | |
f5e5bf25 TW |
414 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
415 | changed |= BSS_CHANGED_HT; | |
416 | sdata->bss_conf.assoc_ht = 1; | |
417 | sdata->bss_conf.ht_conf = &conf->ht_conf; | |
418 | sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; | |
419 | } | |
38668c05 | 420 | |
f5e5bf25 TW |
421 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
422 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
423 | ieee80211_sta_send_associnfo(sdata, ifsta); | |
38668c05 | 424 | |
f0706e82 | 425 | ifsta->last_probe = jiffies; |
f5e5bf25 | 426 | ieee80211_led_assoc(local, 1); |
471b3efd | 427 | |
f5e5bf25 | 428 | sdata->bss_conf.assoc = 1; |
471b3efd | 429 | ieee80211_bss_info_change_notify(sdata, changed); |
8db9369f | 430 | |
f5e5bf25 | 431 | netif_carrier_on(sdata->dev); |
8db9369f | 432 | |
f5e5bf25 | 433 | ieee80211_sta_send_apinfo(sdata, ifsta); |
f0706e82 JB |
434 | } |
435 | ||
f698d856 | 436 | void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ee385855 | 437 | int encrypt) |
f0706e82 | 438 | { |
f0706e82 JB |
439 | skb->dev = sdata->local->mdev; |
440 | skb_set_mac_header(skb, 0); | |
441 | skb_set_network_header(skb, 0); | |
442 | skb_set_transport_header(skb, 0); | |
443 | ||
d0f09804 JB |
444 | skb->iif = sdata->dev->ifindex; |
445 | skb->do_not_encrypt = !encrypt; | |
f0706e82 JB |
446 | |
447 | dev_queue_xmit(skb); | |
448 | } | |
449 | ||
450 | ||
f698d856 | 451 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
452 | struct ieee80211_if_sta *ifsta, |
453 | int transaction, u8 *extra, size_t extra_len, | |
454 | int encrypt) | |
455 | { | |
f698d856 | 456 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
457 | struct sk_buff *skb; |
458 | struct ieee80211_mgmt *mgmt; | |
459 | ||
460 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
461 | sizeof(*mgmt) + 6 + extra_len); | |
462 | if (!skb) { | |
463 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
f698d856 | 464 | "frame\n", sdata->dev->name); |
f0706e82 JB |
465 | return; |
466 | } | |
467 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
468 | ||
469 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
470 | memset(mgmt, 0, 24 + 6); | |
e7827a70 HH |
471 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
472 | IEEE80211_STYPE_AUTH); | |
f0706e82 JB |
473 | if (encrypt) |
474 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
475 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 476 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
477 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
478 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
479 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
480 | ifsta->auth_transaction = transaction + 1; | |
481 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
482 | if (extra) | |
483 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
484 | ||
f698d856 | 485 | ieee80211_sta_tx(sdata, skb, encrypt); |
f0706e82 JB |
486 | } |
487 | ||
9859b81e RR |
488 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
489 | struct ieee80211_if_sta *ifsta) | |
490 | { | |
491 | DECLARE_MAC_BUF(mac); | |
492 | ||
493 | ifsta->direct_probe_tries++; | |
494 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
495 | printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n", | |
496 | sdata->dev->name, print_mac(mac, ifsta->bssid)); | |
497 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
498 | return; | |
499 | } | |
500 | ||
501 | printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n", | |
502 | sdata->dev->name, print_mac(mac, ifsta->bssid), | |
503 | ifsta->direct_probe_tries); | |
504 | ||
505 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
506 | ||
507 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); | |
508 | ||
509 | /* Direct probe is sent to broadcast address as some APs | |
510 | * will not answer to direct packet in unassociated state. | |
511 | */ | |
512 | ieee80211_send_probe_req(sdata, NULL, | |
513 | ifsta->ssid, ifsta->ssid_len); | |
514 | ||
515 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
516 | } | |
517 | ||
f0706e82 | 518 | |
f698d856 | 519 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
520 | struct ieee80211_if_sta *ifsta) |
521 | { | |
0795af57 JP |
522 | DECLARE_MAC_BUF(mac); |
523 | ||
f0706e82 JB |
524 | ifsta->auth_tries++; |
525 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 526 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 527 | " timed out\n", |
f698d856 | 528 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 529 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
530 | return; |
531 | } | |
532 | ||
48c2fc59 | 533 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0795af57 | 534 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
f698d856 | 535 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 536 | |
f698d856 | 537 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
f0706e82 JB |
538 | |
539 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
540 | } | |
541 | ||
36d16ae7 HS |
542 | static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
543 | struct ieee80211_supported_band *sband, | |
544 | u64 *rates) | |
545 | { | |
546 | int i, j, count; | |
547 | *rates = 0; | |
548 | count = 0; | |
549 | for (i = 0; i < bss->supp_rates_len; i++) { | |
550 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
551 | ||
552 | for (j = 0; j < sband->n_bitrates; j++) | |
553 | if (sband->bitrates[j].bitrate == rate) { | |
554 | *rates |= BIT(j); | |
555 | count++; | |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | return count; | |
561 | } | |
f0706e82 | 562 | |
f698d856 | 563 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
564 | struct ieee80211_if_sta *ifsta) |
565 | { | |
f698d856 | 566 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
567 | struct sk_buff *skb; |
568 | struct ieee80211_mgmt *mgmt; | |
43ac2ca3 | 569 | u8 *pos, *ies, *ht_add_ie; |
36d16ae7 | 570 | int i, len, count, rates_len, supp_rates_len; |
f0706e82 JB |
571 | u16 capab; |
572 | struct ieee80211_sta_bss *bss; | |
573 | int wmm = 0; | |
8318d78a | 574 | struct ieee80211_supported_band *sband; |
36d16ae7 | 575 | u64 rates = 0; |
f0706e82 JB |
576 | |
577 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
578 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
579 | ifsta->ssid_len); | |
580 | if (!skb) { | |
581 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
f698d856 | 582 | "frame\n", sdata->dev->name); |
f0706e82 JB |
583 | return; |
584 | } | |
585 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
586 | ||
8318d78a JB |
587 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
588 | ||
f0706e82 | 589 | capab = ifsta->capab; |
8318d78a JB |
590 | |
591 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
592 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
593 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
594 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
595 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 596 | } |
8318d78a | 597 | |
f698d856 | 598 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 599 | local->hw.conf.channel->center_freq, |
cffdd30d | 600 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
601 | if (bss) { |
602 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
603 | capab |= WLAN_CAPABILITY_PRIVACY; | |
43ac2ca3 | 604 | if (bss->wmm_used) |
f0706e82 | 605 | wmm = 1; |
0d580a77 HS |
606 | |
607 | /* get all rates supported by the device and the AP as | |
608 | * some APs don't like getting a superset of their rates | |
609 | * in the association request (e.g. D-Link DAP 1353 in | |
610 | * b-only mode) */ | |
611 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
612 | ||
06ff47bc TW |
613 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
614 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
615 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
616 | ||
3e122be0 | 617 | ieee80211_rx_bss_put(local, bss); |
0d580a77 HS |
618 | } else { |
619 | rates = ~0; | |
620 | rates_len = sband->n_bitrates; | |
f0706e82 JB |
621 | } |
622 | ||
623 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
624 | memset(mgmt, 0, 24); | |
625 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 626 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
627 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
628 | ||
d6f2da5b | 629 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 | 630 | skb_put(skb, 10); |
e7827a70 HH |
631 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
632 | IEEE80211_STYPE_REASSOC_REQ); | |
f0706e82 | 633 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
634 | mgmt->u.reassoc_req.listen_interval = |
635 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
636 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
637 | ETH_ALEN); | |
638 | } else { | |
639 | skb_put(skb, 4); | |
e7827a70 HH |
640 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
641 | IEEE80211_STYPE_ASSOC_REQ); | |
f0706e82 | 642 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
643 | mgmt->u.reassoc_req.listen_interval = |
644 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
645 | } |
646 | ||
647 | /* SSID */ | |
648 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
649 | *pos++ = WLAN_EID_SSID; | |
650 | *pos++ = ifsta->ssid_len; | |
651 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
652 | ||
0d580a77 | 653 | /* add all rates which were marked to be used above */ |
36d16ae7 HS |
654 | supp_rates_len = rates_len; |
655 | if (supp_rates_len > 8) | |
656 | supp_rates_len = 8; | |
657 | ||
8318d78a | 658 | len = sband->n_bitrates; |
36d16ae7 | 659 | pos = skb_put(skb, supp_rates_len + 2); |
f0706e82 | 660 | *pos++ = WLAN_EID_SUPP_RATES; |
36d16ae7 | 661 | *pos++ = supp_rates_len; |
f0706e82 | 662 | |
36d16ae7 HS |
663 | count = 0; |
664 | for (i = 0; i < sband->n_bitrates; i++) { | |
665 | if (BIT(i) & rates) { | |
8318d78a | 666 | int rate = sband->bitrates[i].bitrate; |
f0706e82 | 667 | *pos++ = (u8) (rate / 5); |
36d16ae7 HS |
668 | if (++count == 8) |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
8ab65b03 | 673 | if (rates_len > count) { |
36d16ae7 HS |
674 | pos = skb_put(skb, rates_len - count + 2); |
675 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
676 | *pos++ = rates_len - count; | |
677 | ||
678 | for (i++; i < sband->n_bitrates; i++) { | |
679 | if (BIT(i) & rates) { | |
680 | int rate = sband->bitrates[i].bitrate; | |
681 | *pos++ = (u8) (rate / 5); | |
682 | } | |
f0706e82 JB |
683 | } |
684 | } | |
685 | ||
06ff47bc TW |
686 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
687 | /* 1. power capabilities */ | |
688 | pos = skb_put(skb, 4); | |
689 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
690 | *pos++ = 2; | |
691 | *pos++ = 0; /* min tx power */ | |
692 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
693 | ||
694 | /* 2. supported channels */ | |
695 | /* TODO: get this in reg domain format */ | |
696 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
697 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
698 | *pos++ = 2 * sband->n_channels; | |
699 | for (i = 0; i < sband->n_channels; i++) { | |
700 | *pos++ = ieee80211_frequency_to_channel( | |
701 | sband->channels[i].center_freq); | |
702 | *pos++ = 1; /* one channel in the subband*/ | |
703 | } | |
704 | } | |
705 | ||
f0706e82 JB |
706 | if (ifsta->extra_ie) { |
707 | pos = skb_put(skb, ifsta->extra_ie_len); | |
708 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
709 | } | |
710 | ||
d6f2da5b | 711 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
712 | pos = skb_put(skb, 9); |
713 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
714 | *pos++ = 7; /* len */ | |
715 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
716 | *pos++ = 0x50; | |
717 | *pos++ = 0xf2; | |
718 | *pos++ = 2; /* WME */ | |
719 | *pos++ = 0; /* WME info */ | |
720 | *pos++ = 1; /* WME ver */ | |
721 | *pos++ = 0; | |
722 | } | |
3434fbd3 | 723 | |
c7153508 | 724 | /* wmm support is a must to HT */ |
3434fbd3 | 725 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
43ac2ca3 JM |
726 | sband->ht_info.ht_supported && |
727 | (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { | |
9306102e | 728 | struct ieee80211_ht_addt_info *ht_add_info = |
43ac2ca3 | 729 | (struct ieee80211_ht_addt_info *)ht_add_ie; |
9306102e EG |
730 | u16 cap = sband->ht_info.cap; |
731 | __le16 tmp; | |
732 | u32 flags = local->hw.conf.channel->flags; | |
733 | ||
734 | switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { | |
735 | case IEEE80211_HT_IE_CHA_SEC_ABOVE: | |
736 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
737 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
738 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
739 | } | |
740 | break; | |
741 | case IEEE80211_HT_IE_CHA_SEC_BELOW: | |
742 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
743 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
744 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
745 | } | |
746 | break; | |
747 | } | |
748 | ||
749 | tmp = cpu_to_le16(cap); | |
c7153508 RR |
750 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
751 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
752 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
753 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
754 | memcpy(pos, &tmp, sizeof(u16)); | |
755 | pos += sizeof(u16); | |
8318d78a JB |
756 | /* TODO: needs a define here for << 2 */ |
757 | *pos++ = sband->ht_info.ampdu_factor | | |
758 | (sband->ht_info.ampdu_density << 2); | |
759 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 760 | } |
f0706e82 JB |
761 | |
762 | kfree(ifsta->assocreq_ies); | |
763 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 764 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
765 | if (ifsta->assocreq_ies) |
766 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
767 | ||
f698d856 | 768 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
769 | } |
770 | ||
771 | ||
f698d856 | 772 | static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
773 | struct ieee80211_if_sta *ifsta, u16 reason) |
774 | { | |
f698d856 | 775 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
776 | struct sk_buff *skb; |
777 | struct ieee80211_mgmt *mgmt; | |
778 | ||
779 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
780 | if (!skb) { | |
781 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
f698d856 | 782 | "frame\n", sdata->dev->name); |
f0706e82 JB |
783 | return; |
784 | } | |
785 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
786 | ||
787 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
788 | memset(mgmt, 0, 24); | |
789 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 790 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 791 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
792 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
793 | IEEE80211_STYPE_DEAUTH); | |
f0706e82 JB |
794 | skb_put(skb, 2); |
795 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
796 | ||
f698d856 | 797 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
798 | } |
799 | ||
800 | ||
f698d856 | 801 | static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
802 | struct ieee80211_if_sta *ifsta, u16 reason) |
803 | { | |
f698d856 | 804 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
805 | struct sk_buff *skb; |
806 | struct ieee80211_mgmt *mgmt; | |
807 | ||
808 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
809 | if (!skb) { | |
810 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
f698d856 | 811 | "frame\n", sdata->dev->name); |
f0706e82 JB |
812 | return; |
813 | } | |
814 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
815 | ||
816 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
817 | memset(mgmt, 0, 24); | |
818 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 819 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 820 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
821 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
822 | IEEE80211_STYPE_DISASSOC); | |
f0706e82 JB |
823 | skb_put(skb, 2); |
824 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
825 | ||
f698d856 | 826 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
827 | } |
828 | ||
aa458d17 TW |
829 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
830 | struct ieee80211_if_sta *ifsta, bool deauth, | |
831 | bool self_disconnected, u16 reason) | |
832 | { | |
833 | struct ieee80211_local *local = sdata->local; | |
834 | struct sta_info *sta; | |
f5e5bf25 | 835 | u32 changed = BSS_CHANGED_ASSOC; |
aa458d17 TW |
836 | |
837 | rcu_read_lock(); | |
838 | ||
839 | sta = sta_info_get(local, ifsta->bssid); | |
840 | if (!sta) { | |
841 | rcu_read_unlock(); | |
842 | return; | |
843 | } | |
844 | ||
845 | if (deauth) { | |
846 | ifsta->direct_probe_tries = 0; | |
847 | ifsta->auth_tries = 0; | |
848 | } | |
849 | ifsta->assoc_scan_tries = 0; | |
850 | ifsta->assoc_tries = 0; | |
851 | ||
852 | netif_carrier_off(sdata->dev); | |
853 | ||
854 | ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr); | |
855 | ||
856 | if (self_disconnected) { | |
857 | if (deauth) | |
858 | ieee80211_send_deauth(sdata, ifsta, reason); | |
859 | else | |
860 | ieee80211_send_disassoc(sdata, ifsta, reason); | |
861 | } | |
862 | ||
f5e5bf25 TW |
863 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
864 | changed |= ieee80211_reset_erp_info(sdata); | |
865 | ||
866 | if (sdata->bss_conf.assoc_ht) | |
867 | changed |= BSS_CHANGED_HT; | |
868 | ||
869 | sdata->bss_conf.assoc_ht = 0; | |
870 | sdata->bss_conf.ht_conf = NULL; | |
871 | sdata->bss_conf.ht_bss_conf = NULL; | |
872 | ||
873 | ieee80211_led_assoc(local, 0); | |
874 | sdata->bss_conf.assoc = 0; | |
875 | ||
876 | ieee80211_sta_send_apinfo(sdata, ifsta); | |
aa458d17 TW |
877 | |
878 | if (self_disconnected) | |
879 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
880 | ||
881 | sta_info_unlink(&sta); | |
882 | ||
883 | rcu_read_unlock(); | |
884 | ||
885 | sta_info_destroy(sta); | |
886 | } | |
f0706e82 | 887 | |
f698d856 | 888 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
889 | struct ieee80211_if_sta *ifsta) |
890 | { | |
f698d856 | 891 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 892 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
893 | int bss_privacy; |
894 | int wep_privacy; | |
895 | int privacy_invoked; | |
f0706e82 | 896 | |
5b98b1f7 | 897 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
898 | return 0; |
899 | ||
f698d856 | 900 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 901 | local->hw.conf.channel->center_freq, |
cffdd30d | 902 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
903 | if (!bss) |
904 | return 0; | |
905 | ||
5b98b1f7 | 906 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 907 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 908 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 909 | |
3e122be0 | 910 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 911 | |
5b98b1f7 JB |
912 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
913 | return 0; | |
914 | ||
915 | return 1; | |
f0706e82 JB |
916 | } |
917 | ||
918 | ||
f698d856 | 919 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
920 | struct ieee80211_if_sta *ifsta) |
921 | { | |
0795af57 JP |
922 | DECLARE_MAC_BUF(mac); |
923 | ||
f0706e82 JB |
924 | ifsta->assoc_tries++; |
925 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 926 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 927 | " timed out\n", |
f698d856 | 928 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 929 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
930 | return; |
931 | } | |
932 | ||
48c2fc59 | 933 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0795af57 | 934 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
f698d856 JBG |
935 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
936 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
f0706e82 | 937 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 938 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 939 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
940 | return; |
941 | } | |
942 | ||
f698d856 | 943 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
944 | |
945 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
946 | } | |
947 | ||
948 | ||
f698d856 | 949 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
950 | struct ieee80211_if_sta *ifsta) |
951 | { | |
f698d856 | 952 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
953 | struct sta_info *sta; |
954 | int disassoc; | |
0795af57 | 955 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
956 | |
957 | /* TODO: start monitoring current AP signal quality and number of | |
958 | * missed beacons. Scan other channels every now and then and search | |
959 | * for better APs. */ | |
960 | /* TODO: remove expired BSSes */ | |
961 | ||
48c2fc59 | 962 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 963 | |
d0709a65 JB |
964 | rcu_read_lock(); |
965 | ||
f0706e82 JB |
966 | sta = sta_info_get(local, ifsta->bssid); |
967 | if (!sta) { | |
0795af57 | 968 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
f698d856 | 969 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
970 | disassoc = 1; |
971 | } else { | |
972 | disassoc = 0; | |
973 | if (time_after(jiffies, | |
974 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 975 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 976 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 977 | "current AP %s - assume out of " |
f0706e82 | 978 | "range\n", |
f698d856 | 979 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 980 | disassoc = 1; |
d6f2da5b | 981 | } else |
f698d856 | 982 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
983 | local->scan_ssid, |
984 | local->scan_ssid_len); | |
d6f2da5b | 985 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 986 | } else { |
d6f2da5b | 987 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
988 | if (time_after(jiffies, ifsta->last_probe + |
989 | IEEE80211_PROBE_INTERVAL)) { | |
990 | ifsta->last_probe = jiffies; | |
f698d856 | 991 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
992 | ifsta->ssid, |
993 | ifsta->ssid_len); | |
994 | } | |
995 | } | |
f0706e82 | 996 | } |
d0709a65 JB |
997 | |
998 | rcu_read_unlock(); | |
999 | ||
aa458d17 TW |
1000 | if (disassoc) |
1001 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
1002 | WLAN_REASON_PREV_AUTH_NOT_VALID); | |
1003 | else | |
f0706e82 JB |
1004 | mod_timer(&ifsta->timer, jiffies + |
1005 | IEEE80211_MONITORING_INTERVAL); | |
f0706e82 JB |
1006 | } |
1007 | ||
1008 | ||
f698d856 | 1009 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
1010 | u8 *ssid, size_t ssid_len) |
1011 | { | |
f698d856 | 1012 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1013 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
1014 | struct sk_buff *skb; |
1015 | struct ieee80211_mgmt *mgmt; | |
1016 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
1017 | int i; | |
1018 | ||
1019 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
1020 | if (!skb) { | |
1021 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
f698d856 | 1022 | "request\n", sdata->dev->name); |
f0706e82 JB |
1023 | return; |
1024 | } | |
1025 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1026 | ||
1027 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1028 | memset(mgmt, 0, 24); | |
e7827a70 HH |
1029 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1030 | IEEE80211_STYPE_PROBE_REQ); | |
f698d856 | 1031 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
1032 | if (dst) { |
1033 | memcpy(mgmt->da, dst, ETH_ALEN); | |
1034 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
1035 | } else { | |
1036 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1037 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
1038 | } | |
1039 | pos = skb_put(skb, 2 + ssid_len); | |
1040 | *pos++ = WLAN_EID_SSID; | |
1041 | *pos++ = ssid_len; | |
1042 | memcpy(pos, ssid, ssid_len); | |
1043 | ||
1044 | supp_rates = skb_put(skb, 2); | |
1045 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
1046 | supp_rates[1] = 0; | |
8318d78a JB |
1047 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1048 | ||
1049 | for (i = 0; i < sband->n_bitrates; i++) { | |
1050 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
f0706e82 JB |
1051 | if (esupp_rates) { |
1052 | pos = skb_put(skb, 1); | |
1053 | esupp_rates[1]++; | |
1054 | } else if (supp_rates[1] == 8) { | |
1055 | esupp_rates = skb_put(skb, 3); | |
1056 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
1057 | esupp_rates[1] = 1; | |
1058 | pos = &esupp_rates[2]; | |
1059 | } else { | |
1060 | pos = skb_put(skb, 1); | |
1061 | supp_rates[1]++; | |
1062 | } | |
8318d78a | 1063 | *pos = rate->bitrate / 5; |
f0706e82 JB |
1064 | } |
1065 | ||
f698d856 | 1066 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
1067 | } |
1068 | ||
1069 | ||
f698d856 | 1070 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1071 | { |
f0706e82 | 1072 | if (!sdata || !sdata->default_key || |
8f20fc24 | 1073 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
1074 | return 0; |
1075 | return 1; | |
1076 | } | |
1077 | ||
1078 | ||
f698d856 | 1079 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1080 | struct ieee80211_if_sta *ifsta) |
1081 | { | |
f698d856 | 1082 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1083 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1084 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1085 | } |
1086 | ||
1087 | ||
f698d856 | 1088 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1089 | struct ieee80211_if_sta *ifsta, |
1090 | struct ieee80211_mgmt *mgmt, | |
1091 | size_t len) | |
1092 | { | |
1093 | u8 *pos; | |
1094 | struct ieee802_11_elems elems; | |
1095 | ||
f0706e82 | 1096 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1097 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1098 | if (!elems.challenge) |
f0706e82 | 1099 | return; |
f698d856 | 1100 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1101 | elems.challenge_len + 2, 1); |
1102 | } | |
1103 | ||
f698d856 | 1104 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
9f985b0e RR |
1105 | u8 dialog_token, u16 status, u16 policy, |
1106 | u16 buf_size, u16 timeout) | |
1107 | { | |
9f985b0e | 1108 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 1109 | struct ieee80211_local *local = sdata->local; |
9f985b0e RR |
1110 | struct sk_buff *skb; |
1111 | struct ieee80211_mgmt *mgmt; | |
1112 | u16 capab; | |
1113 | ||
3acea5b6 EK |
1114 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
1115 | ||
9f985b0e RR |
1116 | if (!skb) { |
1117 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
f698d856 | 1118 | "for addba resp frame\n", sdata->dev->name); |
9f985b0e RR |
1119 | return; |
1120 | } | |
1121 | ||
1122 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1123 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1124 | memset(mgmt, 0, 24); | |
1125 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1126 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1127 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1128 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
9f985b0e RR |
1129 | else |
1130 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1131 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1132 | IEEE80211_STYPE_ACTION); | |
9f985b0e RR |
1133 | |
1134 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1135 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1136 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1137 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1138 | ||
1139 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1140 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1141 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1142 | ||
1143 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1144 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1145 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1146 | ||
f698d856 | 1147 | ieee80211_sta_tx(sdata, skb, 0); |
9f985b0e RR |
1148 | |
1149 | return; | |
1150 | } | |
1151 | ||
f698d856 | 1152 | void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, |
eadc8d9e RR |
1153 | u16 tid, u8 dialog_token, u16 start_seq_num, |
1154 | u16 agg_size, u16 timeout) | |
1155 | { | |
f698d856 | 1156 | struct ieee80211_local *local = sdata->local; |
eadc8d9e RR |
1157 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1158 | struct sk_buff *skb; | |
1159 | struct ieee80211_mgmt *mgmt; | |
1160 | u16 capab; | |
1161 | ||
3acea5b6 | 1162 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
eadc8d9e RR |
1163 | |
1164 | if (!skb) { | |
1165 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1166 | "for addba request frame\n", sdata->dev->name); |
eadc8d9e RR |
1167 | return; |
1168 | } | |
1169 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1170 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1171 | memset(mgmt, 0, 24); | |
1172 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1173 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e | 1174 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1175 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e RR |
1176 | else |
1177 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1178 | ||
e7827a70 HH |
1179 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1180 | IEEE80211_STYPE_ACTION); | |
eadc8d9e RR |
1181 | |
1182 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); | |
1183 | ||
1184 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1185 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; | |
1186 | ||
1187 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; | |
1188 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ | |
1189 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1190 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ | |
1191 | ||
1192 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); | |
1193 | ||
1194 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); | |
1195 | mgmt->u.action.u.addba_req.start_seq_num = | |
1196 | cpu_to_le16(start_seq_num << 4); | |
1197 | ||
f698d856 | 1198 | ieee80211_sta_tx(sdata, skb, 0); |
eadc8d9e RR |
1199 | } |
1200 | ||
f698d856 | 1201 | static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
9f985b0e RR |
1202 | struct ieee80211_mgmt *mgmt, |
1203 | size_t len) | |
1204 | { | |
07db2183 RR |
1205 | struct ieee80211_hw *hw = &local->hw; |
1206 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1207 | struct sta_info *sta; |
07db2183 RR |
1208 | struct tid_ampdu_rx *tid_agg_rx; |
1209 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1210 | u8 dialog_token; |
07db2183 RR |
1211 | int ret = -EOPNOTSUPP; |
1212 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1213 | |
d0709a65 JB |
1214 | rcu_read_lock(); |
1215 | ||
9f985b0e | 1216 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1217 | if (!sta) { |
1218 | rcu_read_unlock(); | |
9f985b0e | 1219 | return; |
d0709a65 | 1220 | } |
9f985b0e RR |
1221 | |
1222 | /* extract session parameters from addba request frame */ | |
1223 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1224 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1225 | start_seq_num = |
1226 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1227 | |
1228 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1229 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1230 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1231 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1232 | ||
9f985b0e RR |
1233 | status = WLAN_STATUS_REQUEST_DECLINED; |
1234 | ||
07db2183 RR |
1235 | /* sanity check for incoming parameters: |
1236 | * check if configuration can support the BA policy | |
1237 | * and if buffer size does not exceeds max value */ | |
1238 | if (((ba_policy != 1) | |
1239 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1240 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1241 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1242 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1243 | if (net_ratelimit()) | |
7b9d44cd | 1244 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1245 | "%s on tid %u. policy %d, buffer size %d\n", |
1246 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1247 | buf_size); | |
1248 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1249 | goto end_no_lock; | |
1250 | } | |
1251 | /* determine default buffer size */ | |
1252 | if (buf_size == 0) { | |
8318d78a JB |
1253 | struct ieee80211_supported_band *sband; |
1254 | ||
1255 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1256 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1257 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1258 | } |
1259 | ||
07db2183 RR |
1260 | |
1261 | /* examine state machine */ | |
07346f81 | 1262 | spin_lock_bh(&sta->lock); |
07db2183 | 1263 | |
cee24a3e | 1264 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1265 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1266 | if (net_ratelimit()) | |
7b9d44cd | 1267 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1268 | "%s on tid %u\n", |
1269 | print_mac(mac, mgmt->sa), tid); | |
1270 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1271 | goto end; | |
1272 | } | |
1273 | ||
cee24a3e RR |
1274 | /* prepare A-MPDU MLME for Rx aggregation */ |
1275 | sta->ampdu_mlme.tid_rx[tid] = | |
1276 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1277 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
f4ea83dd | 1278 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
1279 | if (net_ratelimit()) |
1280 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1281 | tid); | |
f4ea83dd | 1282 | #endif |
cee24a3e RR |
1283 | goto end; |
1284 | } | |
1285 | /* rx timer */ | |
1286 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1287 | sta_rx_agg_session_timer_expired; | |
1288 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1289 | (unsigned long)&sta->timer_to_tid[tid]; | |
1290 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1291 | ||
1292 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1293 | ||
07db2183 RR |
1294 | /* prepare reordering buffer */ |
1295 | tid_agg_rx->reorder_buf = | |
c97c23e3 | 1296 | kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
03147dfc | 1297 | if (!tid_agg_rx->reorder_buf) { |
f4ea83dd | 1298 | #ifdef CONFIG_MAC80211_HT_DEBUG |
03147dfc JB |
1299 | if (net_ratelimit()) |
1300 | printk(KERN_ERR "can not allocate reordering buffer " | |
1301 | "to tid %d\n", tid); | |
f4ea83dd | 1302 | #endif |
cee24a3e | 1303 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1304 | goto end; |
1305 | } | |
1306 | memset(tid_agg_rx->reorder_buf, 0, | |
c97c23e3 | 1307 | buf_size * sizeof(struct sk_buff *)); |
07db2183 RR |
1308 | |
1309 | if (local->ops->ampdu_action) | |
1310 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1311 | sta->addr, tid, &start_seq_num); |
07db2183 | 1312 | #ifdef CONFIG_MAC80211_HT_DEBUG |
513a1025 | 1313 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
07db2183 RR |
1314 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
1315 | ||
1316 | if (ret) { | |
1317 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1318 | kfree(tid_agg_rx); |
1319 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1320 | goto end; |
1321 | } | |
1322 | ||
1323 | /* change state and send addba resp */ | |
cee24a3e | 1324 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1325 | tid_agg_rx->dialog_token = dialog_token; |
1326 | tid_agg_rx->ssn = start_seq_num; | |
1327 | tid_agg_rx->head_seq_num = start_seq_num; | |
1328 | tid_agg_rx->buf_size = buf_size; | |
1329 | tid_agg_rx->timeout = timeout; | |
1330 | tid_agg_rx->stored_mpdu_num = 0; | |
1331 | status = WLAN_STATUS_SUCCESS; | |
1332 | end: | |
07346f81 | 1333 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1334 | |
1335 | end_no_lock: | |
f698d856 | 1336 | ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
d0709a65 JB |
1337 | dialog_token, status, 1, buf_size, timeout); |
1338 | rcu_read_unlock(); | |
9f985b0e | 1339 | } |
f0706e82 | 1340 | |
f698d856 | 1341 | static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
eadc8d9e RR |
1342 | struct ieee80211_mgmt *mgmt, |
1343 | size_t len) | |
1344 | { | |
eadc8d9e RR |
1345 | struct ieee80211_hw *hw = &local->hw; |
1346 | struct sta_info *sta; | |
1347 | u16 capab; | |
1348 | u16 tid; | |
1349 | u8 *state; | |
1350 | ||
d0709a65 JB |
1351 | rcu_read_lock(); |
1352 | ||
eadc8d9e | 1353 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1354 | if (!sta) { |
1355 | rcu_read_unlock(); | |
eadc8d9e | 1356 | return; |
d0709a65 | 1357 | } |
eadc8d9e RR |
1358 | |
1359 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1360 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1361 | ||
cee24a3e | 1362 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1363 | |
07346f81 | 1364 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1365 | |
cee24a3e | 1366 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1367 | spin_unlock_bh(&sta->lock); |
cee24a3e RR |
1368 | goto addba_resp_exit; |
1369 | } | |
1370 | ||
eadc8d9e | 1371 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1372 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
07346f81 | 1373 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1374 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1375 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1376 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1377 | goto addba_resp_exit; |
eadc8d9e RR |
1378 | } |
1379 | ||
cee24a3e | 1380 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1381 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1382 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1383 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1384 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1385 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e | 1386 | *state |= HT_ADDBA_RECEIVED_MSK; |
cee24a3e | 1387 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e | 1388 | |
f4ea83dd | 1389 | if (*state == HT_AGG_STATE_OPERATIONAL) |
eadc8d9e | 1390 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
eadc8d9e | 1391 | |
07346f81 | 1392 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1393 | } else { |
cee24a3e | 1394 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1395 | /* this will allow the state check in stop_BA_session */ |
1396 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1397 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1398 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
1399 | WLAN_BACK_INITIATOR); | |
1400 | } | |
cee24a3e RR |
1401 | |
1402 | addba_resp_exit: | |
d0709a65 | 1403 | rcu_read_unlock(); |
eadc8d9e RR |
1404 | } |
1405 | ||
f698d856 | 1406 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, |
eadc8d9e | 1407 | u16 initiator, u16 reason_code) |
07db2183 | 1408 | { |
f698d856 | 1409 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1410 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1411 | struct sk_buff *skb; | |
1412 | struct ieee80211_mgmt *mgmt; | |
1413 | u16 params; | |
1414 | ||
3acea5b6 | 1415 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
07db2183 RR |
1416 | |
1417 | if (!skb) { | |
1418 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1419 | "for delba frame\n", sdata->dev->name); |
07db2183 RR |
1420 | return; |
1421 | } | |
1422 | ||
1423 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1424 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1425 | memset(mgmt, 0, 24); | |
1426 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1427 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1428 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1429 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
07db2183 RR |
1430 | else |
1431 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1432 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1433 | IEEE80211_STYPE_ACTION); | |
07db2183 RR |
1434 | |
1435 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1436 | ||
1437 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1438 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1439 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1440 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1441 | ||
1442 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1443 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1444 | ||
f698d856 | 1445 | ieee80211_sta_tx(sdata, skb, 0); |
07db2183 RR |
1446 | } |
1447 | ||
f698d856 | 1448 | void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
429a3805 | 1449 | { |
f698d856 | 1450 | struct ieee80211_local *local = sdata->local; |
429a3805 RR |
1451 | struct sk_buff *skb; |
1452 | struct ieee80211_bar *bar; | |
1453 | u16 bar_control = 0; | |
1454 | ||
1455 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); | |
1456 | if (!skb) { | |
1457 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1458 | "bar frame\n", sdata->dev->name); |
429a3805 RR |
1459 | return; |
1460 | } | |
1461 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1462 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); | |
1463 | memset(bar, 0, sizeof(*bar)); | |
e7827a70 HH |
1464 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
1465 | IEEE80211_STYPE_BACK_REQ); | |
429a3805 | 1466 | memcpy(bar->ra, ra, ETH_ALEN); |
f698d856 | 1467 | memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN); |
429a3805 RR |
1468 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
1469 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; | |
1470 | bar_control |= (u16)(tid << 12); | |
1471 | bar->control = cpu_to_le16(bar_control); | |
1472 | bar->start_seq_num = cpu_to_le16(ssn); | |
1473 | ||
f698d856 | 1474 | ieee80211_sta_tx(sdata, skb, 0); |
429a3805 RR |
1475 | } |
1476 | ||
f698d856 | 1477 | void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, |
07db2183 RR |
1478 | u16 initiator, u16 reason) |
1479 | { | |
f698d856 | 1480 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1481 | struct ieee80211_hw *hw = &local->hw; |
1482 | struct sta_info *sta; | |
b580781e | 1483 | int ret, i; |
513a1025 | 1484 | DECLARE_MAC_BUF(mac); |
07db2183 | 1485 | |
d0709a65 JB |
1486 | rcu_read_lock(); |
1487 | ||
07db2183 | 1488 | sta = sta_info_get(local, ra); |
d0709a65 JB |
1489 | if (!sta) { |
1490 | rcu_read_unlock(); | |
07db2183 | 1491 | return; |
d0709a65 | 1492 | } |
07db2183 RR |
1493 | |
1494 | /* check if TID is in operational state */ | |
07346f81 | 1495 | spin_lock_bh(&sta->lock); |
cee24a3e | 1496 | if (sta->ampdu_mlme.tid_state_rx[tid] |
07db2183 | 1497 | != HT_AGG_STATE_OPERATIONAL) { |
07346f81 | 1498 | spin_unlock_bh(&sta->lock); |
d0709a65 | 1499 | rcu_read_unlock(); |
07db2183 RR |
1500 | return; |
1501 | } | |
cee24a3e | 1502 | sta->ampdu_mlme.tid_state_rx[tid] = |
07db2183 RR |
1503 | HT_AGG_STATE_REQ_STOP_BA_MSK | |
1504 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
07346f81 | 1505 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1506 | |
1507 | /* stop HW Rx aggregation. ampdu_action existence | |
1508 | * already verified in session init so we add the BUG_ON */ | |
1509 | BUG_ON(!local->ops->ampdu_action); | |
1510 | ||
513a1025 RR |
1511 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1512 | printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n", | |
1513 | print_mac(mac, ra), tid); | |
1514 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1515 | ||
07db2183 | 1516 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, |
0df3ef45 | 1517 | ra, tid, NULL); |
07db2183 RR |
1518 | if (ret) |
1519 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
f4ea83dd | 1520 | "aggregation for tid %d\n", tid); |
07db2183 RR |
1521 | |
1522 | /* shutdown timer has not expired */ | |
1523 | if (initiator != WLAN_BACK_TIMER) | |
cee24a3e | 1524 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
07db2183 RR |
1525 | |
1526 | /* check if this is a self generated aggregation halt */ | |
1527 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
f698d856 | 1528 | ieee80211_send_delba(sdata, ra, tid, 0, reason); |
07db2183 RR |
1529 | |
1530 | /* free the reordering buffer */ | |
cee24a3e RR |
1531 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
1532 | if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { | |
b580781e | 1533 | /* release the reordered frames */ |
cee24a3e RR |
1534 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
1535 | sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; | |
1536 | sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; | |
b580781e RR |
1537 | } |
1538 | } | |
cee24a3e RR |
1539 | /* free resources */ |
1540 | kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); | |
1541 | kfree(sta->ampdu_mlme.tid_rx[tid]); | |
1542 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
1543 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; | |
07db2183 | 1544 | |
d0709a65 | 1545 | rcu_read_unlock(); |
07db2183 RR |
1546 | } |
1547 | ||
eadc8d9e | 1548 | |
f698d856 | 1549 | static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
688b88a4 RR |
1550 | struct ieee80211_mgmt *mgmt, size_t len) |
1551 | { | |
f698d856 | 1552 | struct ieee80211_local *local = sdata->local; |
688b88a4 RR |
1553 | struct sta_info *sta; |
1554 | u16 tid, params; | |
1555 | u16 initiator; | |
1556 | DECLARE_MAC_BUF(mac); | |
1557 | ||
d0709a65 JB |
1558 | rcu_read_lock(); |
1559 | ||
688b88a4 | 1560 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1561 | if (!sta) { |
1562 | rcu_read_unlock(); | |
688b88a4 | 1563 | return; |
d0709a65 | 1564 | } |
688b88a4 RR |
1565 | |
1566 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1567 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1568 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1569 | ||
1570 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1571 | if (net_ratelimit()) | |
d92684e6 RR |
1572 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1573 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1574 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1575 | mgmt->u.action.u.delba.reason_code); |
1576 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1577 | ||
1578 | if (initiator == WLAN_BACK_INITIATOR) | |
f698d856 | 1579 | ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
688b88a4 | 1580 | WLAN_BACK_INITIATOR, 0); |
d92684e6 | 1581 | else { /* WLAN_BACK_RECIPIENT */ |
07346f81 | 1582 | spin_lock_bh(&sta->lock); |
cee24a3e | 1583 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 | 1584 | HT_AGG_STATE_OPERATIONAL; |
07346f81 | 1585 | spin_unlock_bh(&sta->lock); |
d92684e6 RR |
1586 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
1587 | WLAN_BACK_RECIPIENT); | |
1588 | } | |
d0709a65 | 1589 | rcu_read_unlock(); |
688b88a4 RR |
1590 | } |
1591 | ||
eadc8d9e RR |
1592 | /* |
1593 | * After sending add Block Ack request we activated a timer until | |
1594 | * add Block Ack response will arrive from the recipient. | |
1595 | * If this timer expires sta_addba_resp_timer_expired will be executed. | |
1596 | */ | |
1597 | void sta_addba_resp_timer_expired(unsigned long data) | |
1598 | { | |
1599 | /* not an elegant detour, but there is no choice as the timer passes | |
1600 | * only one argument, and both sta_info and TID are needed, so init | |
73651ee6 | 1601 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
eadc8d9e | 1602 | * array gives the sta through container_of */ |
70d251b2 | 1603 | u16 tid = *(u8 *)data; |
eadc8d9e RR |
1604 | struct sta_info *temp_sta = container_of((void *)data, |
1605 | struct sta_info, timer_to_tid[tid]); | |
1606 | ||
1607 | struct ieee80211_local *local = temp_sta->local; | |
1608 | struct ieee80211_hw *hw = &local->hw; | |
1609 | struct sta_info *sta; | |
1610 | u8 *state; | |
1611 | ||
d0709a65 JB |
1612 | rcu_read_lock(); |
1613 | ||
eadc8d9e | 1614 | sta = sta_info_get(local, temp_sta->addr); |
d0709a65 JB |
1615 | if (!sta) { |
1616 | rcu_read_unlock(); | |
eadc8d9e | 1617 | return; |
d0709a65 | 1618 | } |
eadc8d9e | 1619 | |
cee24a3e | 1620 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1621 | /* check if the TID waits for addBA response */ |
07346f81 | 1622 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1623 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1624 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1625 | *state = HT_AGG_STATE_IDLE; |
f4ea83dd | 1626 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
1627 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
1628 | "expecting addBA response there", tid); | |
f4ea83dd | 1629 | #endif |
eadc8d9e RR |
1630 | goto timer_expired_exit; |
1631 | } | |
1632 | ||
f4ea83dd | 1633 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 1634 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
f4ea83dd | 1635 | #endif |
eadc8d9e RR |
1636 | |
1637 | /* go through the state check in stop_BA_session */ | |
1638 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1639 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1640 | ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, |
1641 | WLAN_BACK_INITIATOR); | |
1642 | ||
1643 | timer_expired_exit: | |
d0709a65 | 1644 | rcu_read_unlock(); |
eadc8d9e RR |
1645 | } |
1646 | ||
07db2183 | 1647 | /* |
7b9d44cd RR |
1648 | * After accepting the AddBA Request we activated a timer, |
1649 | * resetting it after each frame that arrives from the originator. | |
07db2183 RR |
1650 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
1651 | */ | |
712590de | 1652 | static void sta_rx_agg_session_timer_expired(unsigned long data) |
07db2183 RR |
1653 | { |
1654 | /* not an elegant detour, but there is no choice as the timer passes | |
70d251b2 | 1655 | * only one argument, and various sta_info are needed here, so init |
73651ee6 | 1656 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
07db2183 RR |
1657 | * array gives the sta through container_of */ |
1658 | u8 *ptid = (u8 *)data; | |
1659 | u8 *timer_to_id = ptid - *ptid; | |
1660 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1661 | timer_to_tid[0]); | |
1662 | ||
f4ea83dd | 1663 | #ifdef CONFIG_MAC80211_HT_DEBUG |
07db2183 | 1664 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
f4ea83dd | 1665 | #endif |
f698d856 | 1666 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
d0709a65 | 1667 | (u16)*ptid, WLAN_BACK_TIMER, |
07db2183 RR |
1668 | WLAN_REASON_QSTA_TIMEOUT); |
1669 | } | |
1670 | ||
f698d856 | 1671 | void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr) |
85249e5f | 1672 | { |
f698d856 | 1673 | struct ieee80211_local *local = sdata->local; |
85249e5f RR |
1674 | int i; |
1675 | ||
1676 | for (i = 0; i < STA_TID_NUM; i++) { | |
1677 | ieee80211_stop_tx_ba_session(&local->hw, addr, i, | |
1678 | WLAN_BACK_INITIATOR); | |
f698d856 | 1679 | ieee80211_sta_stop_rx_ba_session(sdata, addr, i, |
85249e5f RR |
1680 | WLAN_BACK_RECIPIENT, |
1681 | WLAN_REASON_QSTA_LEAVE_QBSS); | |
1682 | } | |
1683 | } | |
07db2183 | 1684 | |
f698d856 | 1685 | static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1686 | struct ieee80211_msrment_ie *request_ie, |
1687 | const u8 *da, const u8 *bssid, | |
1688 | u8 dialog_token) | |
1689 | { | |
f698d856 | 1690 | struct ieee80211_local *local = sdata->local; |
b6623486 AK |
1691 | struct sk_buff *skb; |
1692 | struct ieee80211_mgmt *msr_report; | |
1693 | ||
1694 | skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + | |
1695 | sizeof(struct ieee80211_msrment_ie)); | |
1696 | ||
1697 | if (!skb) { | |
1698 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1699 | "measurement report frame\n", sdata->dev->name); |
b6623486 AK |
1700 | return; |
1701 | } | |
1702 | ||
1703 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1704 | msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); | |
1705 | memset(msr_report, 0, 24); | |
1706 | memcpy(msr_report->da, da, ETH_ALEN); | |
f698d856 | 1707 | memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
b6623486 | 1708 | memcpy(msr_report->bssid, bssid, ETH_ALEN); |
e7827a70 | 1709 | msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
b6623486 AK |
1710 | IEEE80211_STYPE_ACTION); |
1711 | ||
1712 | skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); | |
1713 | msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; | |
1714 | msr_report->u.action.u.measurement.action_code = | |
1715 | WLAN_ACTION_SPCT_MSR_RPRT; | |
1716 | msr_report->u.action.u.measurement.dialog_token = dialog_token; | |
1717 | ||
1718 | msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; | |
1719 | msr_report->u.action.u.measurement.length = | |
1720 | sizeof(struct ieee80211_msrment_ie); | |
1721 | ||
1722 | memset(&msr_report->u.action.u.measurement.msr_elem, 0, | |
1723 | sizeof(struct ieee80211_msrment_ie)); | |
1724 | msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; | |
1725 | msr_report->u.action.u.measurement.msr_elem.mode |= | |
1726 | IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; | |
1727 | msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; | |
1728 | ||
f698d856 | 1729 | ieee80211_sta_tx(sdata, skb, 0); |
b6623486 AK |
1730 | } |
1731 | ||
f698d856 | 1732 | static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1733 | struct ieee80211_mgmt *mgmt, |
1734 | size_t len) | |
1735 | { | |
1736 | /* | |
1737 | * Ignoring measurement request is spec violation. | |
1738 | * Mandatory measurements must be reported optional | |
1739 | * measurements might be refused or reported incapable | |
1740 | * For now just refuse | |
1741 | * TODO: Answer basic measurement as unmeasured | |
1742 | */ | |
f698d856 | 1743 | ieee80211_send_refuse_measurement_request(sdata, |
b6623486 AK |
1744 | &mgmt->u.action.u.measurement.msr_elem, |
1745 | mgmt->sa, mgmt->bssid, | |
1746 | mgmt->u.action.u.measurement.dialog_token); | |
1747 | } | |
1748 | ||
1749 | ||
f698d856 | 1750 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1751 | struct ieee80211_if_sta *ifsta, |
1752 | struct ieee80211_mgmt *mgmt, | |
1753 | size_t len) | |
1754 | { | |
f0706e82 | 1755 | u16 auth_alg, auth_transaction, status_code; |
0795af57 | 1756 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1757 | |
48c2fc59 | 1758 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
f4ea83dd | 1759 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
f0706e82 | 1760 | return; |
f0706e82 | 1761 | |
f4ea83dd | 1762 | if (len < 24 + 6) |
f0706e82 | 1763 | return; |
f0706e82 | 1764 | |
51fb61e7 | 1765 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1766 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1767 | return; |
f0706e82 | 1768 | |
51fb61e7 | 1769 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1770 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1771 | return; |
f0706e82 JB |
1772 | |
1773 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1774 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1775 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1776 | ||
51fb61e7 | 1777 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
135a2110 JB |
1778 | /* |
1779 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1780 | * networks and most implementations do not seem to use it. |
1781 | * However, try to reply to authentication attempts if someone | |
1782 | * has actually implemented this. | |
135a2110 | 1783 | */ |
f4ea83dd | 1784 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1785 | return; |
f698d856 | 1786 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1787 | } |
1788 | ||
1789 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1790 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1791 | return; |
f0706e82 JB |
1792 | |
1793 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1794 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1795 | u8 algs[3]; | |
1796 | const int num_algs = ARRAY_SIZE(algs); | |
1797 | int i, pos; | |
1798 | algs[0] = algs[1] = algs[2] = 0xff; | |
1799 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1800 | algs[0] = WLAN_AUTH_OPEN; | |
1801 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1802 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1803 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1804 | algs[2] = WLAN_AUTH_LEAP; | |
1805 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1806 | pos = 0; | |
1807 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1808 | pos = 1; | |
1809 | else | |
1810 | pos = 2; | |
1811 | for (i = 0; i < num_algs; i++) { | |
1812 | pos++; | |
1813 | if (pos >= num_algs) | |
1814 | pos = 0; | |
1815 | if (algs[pos] == ifsta->auth_alg || | |
1816 | algs[pos] == 0xff) | |
1817 | continue; | |
1818 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1819 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1820 | continue; |
1821 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1822 | break; |
1823 | } | |
1824 | } | |
1825 | return; | |
1826 | } | |
1827 | ||
1828 | switch (ifsta->auth_alg) { | |
1829 | case WLAN_AUTH_OPEN: | |
1830 | case WLAN_AUTH_LEAP: | |
f698d856 | 1831 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1832 | break; |
1833 | case WLAN_AUTH_SHARED_KEY: | |
1834 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1835 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1836 | else |
f698d856 | 1837 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1838 | break; |
1839 | } | |
1840 | } | |
1841 | ||
1842 | ||
f698d856 | 1843 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1844 | struct ieee80211_if_sta *ifsta, |
1845 | struct ieee80211_mgmt *mgmt, | |
1846 | size_t len) | |
1847 | { | |
1848 | u16 reason_code; | |
0795af57 | 1849 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1850 | |
f4ea83dd | 1851 | if (len < 24 + 2) |
f0706e82 | 1852 | return; |
f0706e82 | 1853 | |
f4ea83dd | 1854 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1855 | return; |
f0706e82 JB |
1856 | |
1857 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1858 | ||
988c0f72 | 1859 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1860 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1861 | |
48c2fc59 TW |
1862 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1863 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1864 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1865 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1866 | mod_timer(&ifsta->timer, jiffies + |
1867 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1868 | } | |
1869 | ||
aa458d17 | 1870 | ieee80211_set_disassoc(sdata, ifsta, true, false, 0); |
d6f2da5b | 1871 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1872 | } |
1873 | ||
1874 | ||
f698d856 | 1875 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1876 | struct ieee80211_if_sta *ifsta, |
1877 | struct ieee80211_mgmt *mgmt, | |
1878 | size_t len) | |
1879 | { | |
1880 | u16 reason_code; | |
0795af57 | 1881 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1882 | |
f4ea83dd | 1883 | if (len < 24 + 2) |
f0706e82 | 1884 | return; |
f0706e82 | 1885 | |
f4ea83dd | 1886 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1887 | return; |
f0706e82 JB |
1888 | |
1889 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1890 | ||
d6f2da5b | 1891 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 1892 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 1893 | |
48c2fc59 TW |
1894 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1895 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1896 | mod_timer(&ifsta->timer, jiffies + |
1897 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1898 | } | |
1899 | ||
aa458d17 | 1900 | ieee80211_set_disassoc(sdata, ifsta, false, false, 0); |
f0706e82 JB |
1901 | } |
1902 | ||
1903 | ||
471b3efd | 1904 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1905 | struct ieee80211_if_sta *ifsta, |
1906 | struct ieee80211_mgmt *mgmt, | |
1907 | size_t len, | |
1908 | int reassoc) | |
1909 | { | |
471b3efd | 1910 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1911 | struct ieee80211_supported_band *sband; |
f0706e82 | 1912 | struct sta_info *sta; |
8318d78a | 1913 | u64 rates, basic_rates; |
f0706e82 JB |
1914 | u16 capab_info, status_code, aid; |
1915 | struct ieee802_11_elems elems; | |
471b3efd | 1916 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
1917 | u8 *pos; |
1918 | int i, j; | |
0795af57 | 1919 | DECLARE_MAC_BUF(mac); |
8318d78a | 1920 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
1921 | |
1922 | /* AssocResp and ReassocResp have identical structure, so process both | |
1923 | * of them in this function. */ | |
1924 | ||
48c2fc59 | 1925 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1926 | return; |
f0706e82 | 1927 | |
f4ea83dd | 1928 | if (len < 24 + 6) |
f0706e82 | 1929 | return; |
f0706e82 | 1930 | |
f4ea83dd | 1931 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1932 | return; |
f0706e82 JB |
1933 | |
1934 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1935 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1936 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1937 | |
0795af57 | 1938 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1939 | "status=%d aid=%d)\n", |
f698d856 | 1940 | sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1941 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1942 | |
1943 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1944 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1945 | sdata->dev->name, status_code); |
8a69aa93 DD |
1946 | /* if this was a reassociation, ensure we try a "full" |
1947 | * association next time. This works around some broken APs | |
1948 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1949 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1950 | return; |
1951 | } | |
1952 | ||
1dd84aa2 JB |
1953 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1954 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1955 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1956 | aid &= ~(BIT(15) | BIT(14)); |
1957 | ||
f0706e82 | 1958 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1959 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1960 | |
1961 | if (!elems.supp_rates) { | |
1962 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1963 | sdata->dev->name); |
f0706e82 JB |
1964 | return; |
1965 | } | |
1966 | ||
f698d856 | 1967 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1968 | ifsta->aid = aid; |
1969 | ifsta->ap_capab = capab_info; | |
1970 | ||
1971 | kfree(ifsta->assocresp_ies); | |
1972 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1973 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1974 | if (ifsta->assocresp_ies) |
1975 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1976 | ||
d0709a65 JB |
1977 | rcu_read_lock(); |
1978 | ||
f0706e82 JB |
1979 | /* Add STA entry for the AP */ |
1980 | sta = sta_info_get(local, ifsta->bssid); | |
1981 | if (!sta) { | |
1982 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 1983 | int err; |
d0709a65 | 1984 | |
73651ee6 JB |
1985 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1986 | if (!sta) { | |
1987 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1988 | " the AP\n", sdata->dev->name); |
d0709a65 | 1989 | rcu_read_unlock(); |
f0706e82 JB |
1990 | return; |
1991 | } | |
f698d856 | 1992 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 1993 | local->hw.conf.channel->center_freq, |
cffdd30d | 1994 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 | 1995 | if (bss) { |
f0706e82 | 1996 | sta->last_signal = bss->signal; |
566bfe5a | 1997 | sta->last_qual = bss->qual; |
f0706e82 | 1998 | sta->last_noise = bss->noise; |
3e122be0 | 1999 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 2000 | } |
73651ee6 JB |
2001 | |
2002 | err = sta_info_insert(sta); | |
2003 | if (err) { | |
2004 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
f698d856 | 2005 | " the AP (error %d)\n", sdata->dev->name, err); |
73651ee6 JB |
2006 | rcu_read_unlock(); |
2007 | return; | |
2008 | } | |
a61dae1f RR |
2009 | /* update new sta with its last rx activity */ |
2010 | sta->last_rx = jiffies; | |
f0706e82 JB |
2011 | } |
2012 | ||
73651ee6 JB |
2013 | /* |
2014 | * FIXME: Do we really need to update the sta_info's information here? | |
2015 | * We already know about the AP (we found it in our list) so it | |
2016 | * should already be filled with the right info, no? | |
2017 | * As is stands, all this is racy because typically we assume | |
2018 | * the information that is filled in here (except flags) doesn't | |
2019 | * change while a STA structure is alive. As such, it should move | |
2020 | * to between the sta_info_alloc() and sta_info_insert() above. | |
2021 | */ | |
2022 | ||
07346f81 JB |
2023 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
2024 | WLAN_STA_AUTHORIZED); | |
f0706e82 JB |
2025 | |
2026 | rates = 0; | |
8318d78a JB |
2027 | basic_rates = 0; |
2028 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2029 | ||
f0706e82 JB |
2030 | for (i = 0; i < elems.supp_rates_len; i++) { |
2031 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2032 | |
2033 | if (rate > 110) | |
2034 | have_higher_than_11mbit = true; | |
2035 | ||
2036 | for (j = 0; j < sband->n_bitrates; j++) { | |
2037 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2038 | rates |= BIT(j); |
8318d78a JB |
2039 | if (elems.supp_rates[i] & 0x80) |
2040 | basic_rates |= BIT(j); | |
2041 | } | |
f0706e82 | 2042 | } |
8318d78a | 2043 | |
f0706e82 JB |
2044 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
2045 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2046 | |
2047 | if (rate > 110) | |
2048 | have_higher_than_11mbit = true; | |
2049 | ||
2050 | for (j = 0; j < sband->n_bitrates; j++) { | |
2051 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2052 | rates |= BIT(j); |
8318d78a JB |
2053 | if (elems.ext_supp_rates[i] & 0x80) |
2054 | basic_rates |= BIT(j); | |
2055 | } | |
f0706e82 | 2056 | } |
8318d78a JB |
2057 | |
2058 | sta->supp_rates[local->hw.conf.channel->band] = rates; | |
2059 | sdata->basic_rates = basic_rates; | |
2060 | ||
2061 | /* cf. IEEE 802.11 9.2.12 */ | |
2062 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
2063 | have_higher_than_11mbit) | |
2064 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
2065 | else | |
2066 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2067 | |
3434fbd3 JB |
2068 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
2069 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
d3c990fb | 2070 | struct ieee80211_ht_bss_info bss_info; |
d3c990fb RR |
2071 | ieee80211_ht_cap_ie_to_ht_info( |
2072 | (struct ieee80211_ht_cap *) | |
2073 | elems.ht_cap_elem, &sta->ht_info); | |
2074 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2075 | (struct ieee80211_ht_addt_info *) | |
2076 | elems.ht_info_elem, &bss_info); | |
38668c05 | 2077 | ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); |
d3c990fb RR |
2078 | } |
2079 | ||
f0706e82 JB |
2080 | rate_control_rate_init(sta, local); |
2081 | ||
3434fbd3 | 2082 | if (elems.wmm_param) { |
07346f81 | 2083 | set_sta_flags(sta, WLAN_STA_WME); |
e5f98f2d | 2084 | rcu_read_unlock(); |
f698d856 | 2085 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
f0706e82 | 2086 | elems.wmm_param_len); |
e5f98f2d JB |
2087 | } else |
2088 | rcu_read_unlock(); | |
f0706e82 | 2089 | |
21c0cbe7 TW |
2090 | /* set AID and assoc capability, |
2091 | * ieee80211_set_associated() will tell the driver */ | |
8318d78a | 2092 | bss_conf->aid = aid; |
21c0cbe7 | 2093 | bss_conf->assoc_capability = capab_info; |
f5e5bf25 | 2094 | ieee80211_set_associated(sdata, ifsta); |
f0706e82 | 2095 | |
f698d856 | 2096 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
2097 | } |
2098 | ||
2099 | ||
2100 | /* Caller must hold local->sta_bss_lock */ | |
f698d856 | 2101 | static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local, |
f0706e82 JB |
2102 | struct ieee80211_sta_bss *bss) |
2103 | { | |
f709fc69 | 2104 | u8 hash_idx; |
902acc78 JB |
2105 | |
2106 | if (bss_mesh_cfg(bss)) | |
2107 | hash_idx = mesh_id_hash(bss_mesh_id(bss), | |
2108 | bss_mesh_id_len(bss)); | |
f709fc69 | 2109 | else |
f709fc69 | 2110 | hash_idx = STA_HASH(bss->bssid); |
902acc78 | 2111 | |
f709fc69 LCC |
2112 | bss->hnext = local->sta_bss_hash[hash_idx]; |
2113 | local->sta_bss_hash[hash_idx] = bss; | |
f0706e82 JB |
2114 | } |
2115 | ||
2116 | ||
2117 | /* Caller must hold local->sta_bss_lock */ | |
3e122be0 | 2118 | static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, |
f0706e82 JB |
2119 | struct ieee80211_sta_bss *bss) |
2120 | { | |
f0706e82 JB |
2121 | struct ieee80211_sta_bss *b, *prev = NULL; |
2122 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
2123 | while (b) { | |
2124 | if (b == bss) { | |
2125 | if (!prev) | |
2126 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
2127 | bss->hnext; | |
2128 | else | |
2129 | prev->hnext = bss->hnext; | |
2130 | break; | |
2131 | } | |
2132 | prev = b; | |
2133 | b = b->hnext; | |
2134 | } | |
2135 | } | |
2136 | ||
2137 | ||
2138 | static struct ieee80211_sta_bss * | |
f698d856 | 2139 | ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq, |
cffdd30d | 2140 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2141 | { |
f698d856 | 2142 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2143 | struct ieee80211_sta_bss *bss; |
2144 | ||
dd00cc48 | 2145 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
2146 | if (!bss) |
2147 | return NULL; | |
f0706e82 JB |
2148 | atomic_inc(&bss->users); |
2149 | atomic_inc(&bss->users); | |
2150 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
8318d78a | 2151 | bss->freq = freq; |
cffdd30d JL |
2152 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
2153 | memcpy(bss->ssid, ssid, ssid_len); | |
2154 | bss->ssid_len = ssid_len; | |
2155 | } | |
f0706e82 JB |
2156 | |
2157 | spin_lock_bh(&local->sta_bss_lock); | |
2158 | /* TODO: order by RSSI? */ | |
2159 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2160 | __ieee80211_rx_bss_hash_add(local, bss); |
f0706e82 JB |
2161 | spin_unlock_bh(&local->sta_bss_lock); |
2162 | return bss; | |
2163 | } | |
2164 | ||
f0706e82 | 2165 | static struct ieee80211_sta_bss * |
f698d856 | 2166 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 2167 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2168 | { |
f0706e82 JB |
2169 | struct ieee80211_sta_bss *bss; |
2170 | ||
2171 | spin_lock_bh(&local->sta_bss_lock); | |
2172 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
2173 | while (bss) { | |
902acc78 JB |
2174 | if (!bss_mesh_cfg(bss) && |
2175 | !memcmp(bss->bssid, bssid, ETH_ALEN) && | |
8318d78a | 2176 | bss->freq == freq && |
cffdd30d JL |
2177 | bss->ssid_len == ssid_len && |
2178 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
2179 | atomic_inc(&bss->users); |
2180 | break; | |
2181 | } | |
2182 | bss = bss->hnext; | |
2183 | } | |
2184 | spin_unlock_bh(&local->sta_bss_lock); | |
2185 | return bss; | |
2186 | } | |
2187 | ||
f709fc69 LCC |
2188 | #ifdef CONFIG_MAC80211_MESH |
2189 | static struct ieee80211_sta_bss * | |
f698d856 | 2190 | ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
f709fc69 LCC |
2191 | u8 *mesh_cfg, int freq) |
2192 | { | |
f709fc69 LCC |
2193 | struct ieee80211_sta_bss *bss; |
2194 | ||
2195 | spin_lock_bh(&local->sta_bss_lock); | |
2196 | bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; | |
2197 | while (bss) { | |
902acc78 JB |
2198 | if (bss_mesh_cfg(bss) && |
2199 | !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && | |
f709fc69 LCC |
2200 | bss->freq == freq && |
2201 | mesh_id_len == bss->mesh_id_len && | |
2202 | (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, | |
2203 | mesh_id_len))) { | |
2204 | atomic_inc(&bss->users); | |
2205 | break; | |
2206 | } | |
2207 | bss = bss->hnext; | |
2208 | } | |
2209 | spin_unlock_bh(&local->sta_bss_lock); | |
2210 | return bss; | |
2211 | } | |
2212 | ||
2213 | static struct ieee80211_sta_bss * | |
f698d856 | 2214 | ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
05e5e883 | 2215 | u8 *mesh_cfg, int mesh_config_len, int freq) |
f709fc69 | 2216 | { |
f709fc69 LCC |
2217 | struct ieee80211_sta_bss *bss; |
2218 | ||
05e5e883 LCC |
2219 | if (mesh_config_len != MESH_CFG_LEN) |
2220 | return NULL; | |
2221 | ||
f709fc69 LCC |
2222 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
2223 | if (!bss) | |
2224 | return NULL; | |
2225 | ||
24736701 | 2226 | bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
f709fc69 LCC |
2227 | if (!bss->mesh_cfg) { |
2228 | kfree(bss); | |
2229 | return NULL; | |
2230 | } | |
2231 | ||
2232 | if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { | |
2233 | bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); | |
2234 | if (!bss->mesh_id) { | |
2235 | kfree(bss->mesh_cfg); | |
2236 | kfree(bss); | |
2237 | return NULL; | |
2238 | } | |
2239 | memcpy(bss->mesh_id, mesh_id, mesh_id_len); | |
2240 | } | |
2241 | ||
2242 | atomic_inc(&bss->users); | |
2243 | atomic_inc(&bss->users); | |
24736701 | 2244 | memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
f709fc69 LCC |
2245 | bss->mesh_id_len = mesh_id_len; |
2246 | bss->freq = freq; | |
2247 | spin_lock_bh(&local->sta_bss_lock); | |
2248 | /* TODO: order by RSSI? */ | |
2249 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2250 | __ieee80211_rx_bss_hash_add(local, bss); |
f709fc69 LCC |
2251 | spin_unlock_bh(&local->sta_bss_lock); |
2252 | return bss; | |
2253 | } | |
2254 | #endif | |
f0706e82 JB |
2255 | |
2256 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
2257 | { | |
43ac2ca3 | 2258 | kfree(bss->ies); |
902acc78 JB |
2259 | kfree(bss_mesh_id(bss)); |
2260 | kfree(bss_mesh_cfg(bss)); | |
f0706e82 JB |
2261 | kfree(bss); |
2262 | } | |
2263 | ||
2264 | ||
3e122be0 | 2265 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 JB |
2266 | struct ieee80211_sta_bss *bss) |
2267 | { | |
1ebebea8 PE |
2268 | local_bh_disable(); |
2269 | if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) { | |
2270 | local_bh_enable(); | |
f0706e82 | 2271 | return; |
1ebebea8 | 2272 | } |
f0706e82 | 2273 | |
3e122be0 | 2274 | __ieee80211_rx_bss_hash_del(local, bss); |
f0706e82 JB |
2275 | list_del(&bss->list); |
2276 | spin_unlock_bh(&local->sta_bss_lock); | |
2277 | ieee80211_rx_bss_free(bss); | |
2278 | } | |
2279 | ||
2280 | ||
3e122be0 | 2281 | void ieee80211_rx_bss_list_init(struct ieee80211_local *local) |
f0706e82 | 2282 | { |
f0706e82 JB |
2283 | spin_lock_init(&local->sta_bss_lock); |
2284 | INIT_LIST_HEAD(&local->sta_bss_list); | |
2285 | } | |
2286 | ||
2287 | ||
3e122be0 | 2288 | void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local) |
f0706e82 | 2289 | { |
f0706e82 JB |
2290 | struct ieee80211_sta_bss *bss, *tmp; |
2291 | ||
2292 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
3e122be0 | 2293 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2294 | } |
2295 | ||
2296 | ||
f698d856 | 2297 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a BR |
2298 | struct ieee80211_if_sta *ifsta, |
2299 | struct ieee80211_sta_bss *bss) | |
2300 | { | |
f698d856 | 2301 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
2302 | int res, rates, i, j; |
2303 | struct sk_buff *skb; | |
2304 | struct ieee80211_mgmt *mgmt; | |
a607268a | 2305 | u8 *pos; |
a607268a | 2306 | struct ieee80211_supported_band *sband; |
507b06d0 | 2307 | union iwreq_data wrqu; |
a607268a BR |
2308 | |
2309 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2310 | ||
2311 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 2312 | sta_info_flush_delayed(sdata); |
a607268a BR |
2313 | |
2314 | if (local->ops->reset_tsf) { | |
2315 | /* Reset own TSF to allow time synchronization work. */ | |
2316 | local->ops->reset_tsf(local_to_hw(local)); | |
2317 | } | |
2318 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 2319 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
2320 | if (res) |
2321 | return res; | |
2322 | ||
2323 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2324 | ||
a607268a BR |
2325 | sdata->drop_unencrypted = bss->capability & |
2326 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2327 | ||
f698d856 | 2328 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 2329 | |
be038b37 AK |
2330 | if (res) |
2331 | return res; | |
a607268a | 2332 | |
9d139c81 | 2333 | /* Build IBSS probe response */ |
a607268a | 2334 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
9d139c81 | 2335 | if (skb) { |
a607268a BR |
2336 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2337 | ||
2338 | mgmt = (struct ieee80211_mgmt *) | |
2339 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2340 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
e7827a70 HH |
2341 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2342 | IEEE80211_STYPE_PROBE_RESP); | |
a607268a | 2343 | memset(mgmt->da, 0xff, ETH_ALEN); |
f698d856 | 2344 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
a607268a BR |
2345 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
2346 | mgmt->u.beacon.beacon_int = | |
2347 | cpu_to_le16(local->hw.conf.beacon_int); | |
4faeb860 | 2348 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); |
a607268a BR |
2349 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); |
2350 | ||
2351 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2352 | *pos++ = WLAN_EID_SSID; | |
2353 | *pos++ = ifsta->ssid_len; | |
2354 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2355 | ||
2356 | rates = bss->supp_rates_len; | |
2357 | if (rates > 8) | |
2358 | rates = 8; | |
2359 | pos = skb_put(skb, 2 + rates); | |
2360 | *pos++ = WLAN_EID_SUPP_RATES; | |
2361 | *pos++ = rates; | |
2362 | memcpy(pos, bss->supp_rates, rates); | |
2363 | ||
2364 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
2365 | pos = skb_put(skb, 2 + 1); | |
2366 | *pos++ = WLAN_EID_DS_PARAMS; | |
2367 | *pos++ = 1; | |
2368 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
2369 | } | |
2370 | ||
2371 | pos = skb_put(skb, 2 + 2); | |
2372 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2373 | *pos++ = 2; | |
2374 | /* FIX: set ATIM window based on scan results */ | |
2375 | *pos++ = 0; | |
2376 | *pos++ = 0; | |
2377 | ||
2378 | if (bss->supp_rates_len > 8) { | |
2379 | rates = bss->supp_rates_len - 8; | |
2380 | pos = skb_put(skb, 2 + rates); | |
2381 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2382 | *pos++ = rates; | |
2383 | memcpy(pos, &bss->supp_rates[8], rates); | |
2384 | } | |
2385 | ||
9d139c81 | 2386 | ifsta->probe_resp = skb; |
e039fa4a | 2387 | |
9d139c81 JB |
2388 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
2389 | } | |
a607268a | 2390 | |
9d139c81 JB |
2391 | rates = 0; |
2392 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2393 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2394 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2395 | for (j = 0; j < sband->n_bitrates; j++) | |
2396 | if (sband->bitrates[j].bitrate == bitrate) | |
2397 | rates |= BIT(j); | |
a607268a | 2398 | } |
9d139c81 JB |
2399 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
2400 | ||
f698d856 | 2401 | ieee80211_sta_def_wmm_params(sdata, bss, 1); |
a607268a | 2402 | |
48c2fc59 | 2403 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
2404 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
2405 | ||
507b06d0 DW |
2406 | memset(&wrqu, 0, sizeof(wrqu)); |
2407 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 2408 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
2409 | |
2410 | return res; | |
2411 | } | |
2412 | ||
f709fc69 LCC |
2413 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
2414 | struct ieee802_11_elems *elems, | |
2415 | enum ieee80211_band band) | |
2416 | { | |
2417 | struct ieee80211_supported_band *sband; | |
2418 | struct ieee80211_rate *bitrates; | |
2419 | size_t num_rates; | |
2420 | u64 supp_rates; | |
2421 | int i, j; | |
2422 | sband = local->hw.wiphy->bands[band]; | |
2423 | ||
2424 | if (!sband) { | |
2425 | WARN_ON(1); | |
2426 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2427 | } | |
2428 | ||
2429 | bitrates = sband->bitrates; | |
2430 | num_rates = sband->n_bitrates; | |
2431 | supp_rates = 0; | |
2432 | for (i = 0; i < elems->supp_rates_len + | |
2433 | elems->ext_supp_rates_len; i++) { | |
2434 | u8 rate = 0; | |
2435 | int own_rate; | |
2436 | if (i < elems->supp_rates_len) | |
2437 | rate = elems->supp_rates[i]; | |
2438 | else if (elems->ext_supp_rates) | |
2439 | rate = elems->ext_supp_rates | |
2440 | [i - elems->supp_rates_len]; | |
2441 | own_rate = 5 * (rate & 0x7f); | |
2442 | for (j = 0; j < num_rates; j++) | |
2443 | if (bitrates[j].bitrate == own_rate) | |
2444 | supp_rates |= BIT(j); | |
2445 | } | |
2446 | return supp_rates; | |
2447 | } | |
2448 | ||
8e1535d5 EG |
2449 | static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local, |
2450 | enum ieee80211_band band) | |
2451 | { | |
2452 | struct ieee80211_supported_band *sband; | |
2453 | struct ieee80211_rate *bitrates; | |
2454 | u64 mandatory_rates; | |
2455 | enum ieee80211_rate_flags mandatory_flag; | |
2456 | int i; | |
2457 | ||
2458 | sband = local->hw.wiphy->bands[band]; | |
2459 | if (!sband) { | |
2460 | WARN_ON(1); | |
2461 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2462 | } | |
2463 | ||
2464 | if (band == IEEE80211_BAND_2GHZ) | |
2465 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
2466 | else | |
2467 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
2468 | ||
2469 | bitrates = sband->bitrates; | |
2470 | mandatory_rates = 0; | |
2471 | for (i = 0; i < sband->n_bitrates; i++) | |
2472 | if (bitrates[i].flags & mandatory_flag) | |
2473 | mandatory_rates |= BIT(i); | |
2474 | return mandatory_rates; | |
2475 | } | |
a607268a | 2476 | |
f698d856 | 2477 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2478 | struct ieee80211_mgmt *mgmt, |
2479 | size_t len, | |
2480 | struct ieee80211_rx_status *rx_status, | |
9859b81e | 2481 | struct ieee802_11_elems *elems) |
f0706e82 | 2482 | { |
f698d856 | 2483 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2484 | int freq, clen; |
f0706e82 JB |
2485 | struct ieee80211_sta_bss *bss; |
2486 | struct sta_info *sta; | |
fab7d4a2 | 2487 | struct ieee80211_channel *channel; |
8e1535d5 EG |
2488 | u64 beacon_timestamp, rx_timestamp; |
2489 | u64 supp_rates = 0; | |
9859b81e | 2490 | bool beacon = ieee80211_is_beacon(mgmt->frame_control); |
8e1535d5 | 2491 | enum ieee80211_band band = rx_status->band; |
0795af57 JP |
2492 | DECLARE_MAC_BUF(mac); |
2493 | DECLARE_MAC_BUF(mac2); | |
f0706e82 | 2494 | |
5bda6175 JB |
2495 | if (elems->ds_params && elems->ds_params_len == 1) |
2496 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
2497 | else | |
2498 | freq = rx_status->freq; | |
2499 | ||
2500 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2501 | ||
2502 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2503 | return; | |
f0706e82 | 2504 | |
ae6a44e3 | 2505 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && |
f698d856 | 2506 | elems->mesh_config && mesh_matches_local(elems, sdata)) { |
8e1535d5 | 2507 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
902acc78 | 2508 | |
8e1535d5 | 2509 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
f698d856 | 2510 | mesh_peer_accepts_plinks(elems)); |
902acc78 | 2511 | } |
f709fc69 | 2512 | |
ae6a44e3 | 2513 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && |
8e1535d5 | 2514 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
8e1535d5 EG |
2515 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
2516 | ||
69e6c010 JB |
2517 | rcu_read_lock(); |
2518 | ||
8e1535d5 EG |
2519 | sta = sta_info_get(local, mgmt->sa); |
2520 | if (sta) { | |
2521 | u64 prev_rates; | |
2522 | ||
2523 | prev_rates = sta->supp_rates[band]; | |
2524 | /* make sure mandatory rates are always added */ | |
2525 | sta->supp_rates[band] = supp_rates | | |
2526 | ieee80211_sta_get_mandatory_rates(local, band); | |
2527 | ||
2528 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2529 | if (sta->supp_rates[band] != prev_rates) | |
2530 | printk(KERN_DEBUG "%s: updated supp_rates set " | |
2531 | "for %s based on beacon info (0x%llx | " | |
2532 | "0x%llx -> 0x%llx)\n", | |
2533 | sdata->dev->name, print_mac(mac, sta->addr), | |
2534 | (unsigned long long) prev_rates, | |
2535 | (unsigned long long) supp_rates, | |
2536 | (unsigned long long) sta->supp_rates[band]); | |
2537 | #endif | |
2538 | } else { | |
2539 | ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, | |
2540 | mgmt->sa, supp_rates); | |
f0706e82 | 2541 | } |
f0706e82 | 2542 | |
69e6c010 JB |
2543 | rcu_read_unlock(); |
2544 | } | |
d0709a65 | 2545 | |
f709fc69 | 2546 | #ifdef CONFIG_MAC80211_MESH |
ae6a44e3 | 2547 | if (elems->mesh_config) |
f698d856 | 2548 | bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id, |
ae6a44e3 | 2549 | elems->mesh_id_len, elems->mesh_config, freq); |
f709fc69 LCC |
2550 | else |
2551 | #endif | |
f698d856 | 2552 | bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq, |
ae6a44e3 | 2553 | elems->ssid, elems->ssid_len); |
f709fc69 LCC |
2554 | if (!bss) { |
2555 | #ifdef CONFIG_MAC80211_MESH | |
ae6a44e3 | 2556 | if (elems->mesh_config) |
f698d856 | 2557 | bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id, |
ae6a44e3 EK |
2558 | elems->mesh_id_len, elems->mesh_config, |
2559 | elems->mesh_config_len, freq); | |
f709fc69 LCC |
2560 | else |
2561 | #endif | |
f698d856 | 2562 | bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq, |
ae6a44e3 | 2563 | elems->ssid, elems->ssid_len); |
f0706e82 JB |
2564 | if (!bss) |
2565 | return; | |
2566 | } else { | |
2567 | #if 0 | |
2568 | /* TODO: order by RSSI? */ | |
2569 | spin_lock_bh(&local->sta_bss_lock); | |
2570 | list_move_tail(&bss->list, &local->sta_bss_list); | |
2571 | spin_unlock_bh(&local->sta_bss_lock); | |
2572 | #endif | |
2573 | } | |
2574 | ||
5628221c | 2575 | /* save the ERP value so that it is available at association time */ |
ae6a44e3 EK |
2576 | if (elems->erp_info && elems->erp_info_len >= 1) { |
2577 | bss->erp_value = elems->erp_info[0]; | |
5628221c DD |
2578 | bss->has_erp_value = 1; |
2579 | } | |
2580 | ||
f0706e82 JB |
2581 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
2582 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 | 2583 | |
98f7dfd8 EG |
2584 | if (elems->tim) { |
2585 | struct ieee80211_tim_ie *tim_ie = | |
2586 | (struct ieee80211_tim_ie *)elems->tim; | |
2587 | bss->dtim_period = tim_ie->dtim_period; | |
2588 | } | |
2589 | ||
2590 | /* set default value for buggy APs */ | |
2591 | if (!elems->tim || bss->dtim_period == 0) | |
2592 | bss->dtim_period = 1; | |
2593 | ||
f0706e82 | 2594 | bss->supp_rates_len = 0; |
ae6a44e3 | 2595 | if (elems->supp_rates) { |
f0706e82 | 2596 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2597 | if (clen > elems->supp_rates_len) |
2598 | clen = elems->supp_rates_len; | |
2599 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates, | |
f0706e82 JB |
2600 | clen); |
2601 | bss->supp_rates_len += clen; | |
2602 | } | |
ae6a44e3 | 2603 | if (elems->ext_supp_rates) { |
f0706e82 | 2604 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2605 | if (clen > elems->ext_supp_rates_len) |
2606 | clen = elems->ext_supp_rates_len; | |
f0706e82 | 2607 | memcpy(&bss->supp_rates[bss->supp_rates_len], |
ae6a44e3 | 2608 | elems->ext_supp_rates, clen); |
f0706e82 JB |
2609 | bss->supp_rates_len += clen; |
2610 | } | |
2611 | ||
8e1535d5 | 2612 | bss->band = band; |
30b89b0f | 2613 | |
5bda6175 JB |
2614 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
2615 | ||
30b89b0f JB |
2616 | bss->timestamp = beacon_timestamp; |
2617 | bss->last_update = jiffies; | |
30b89b0f JB |
2618 | bss->signal = rx_status->signal; |
2619 | bss->noise = rx_status->noise; | |
566bfe5a | 2620 | bss->qual = rx_status->qual; |
9859b81e RR |
2621 | if (!beacon) |
2622 | bss->last_probe_resp = jiffies; | |
30b89b0f JB |
2623 | /* |
2624 | * In STA mode, the remaining parameters should not be overridden | |
2625 | * by beacons because they're not necessarily accurate there. | |
2626 | */ | |
2627 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
9859b81e | 2628 | bss->last_probe_resp && beacon) { |
3e122be0 | 2629 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
2630 | return; |
2631 | } | |
2632 | ||
43ac2ca3 JM |
2633 | if (bss->ies == NULL || bss->ies_len < elems->total_len) { |
2634 | kfree(bss->ies); | |
2635 | bss->ies = kmalloc(elems->total_len, GFP_ATOMIC); | |
f0706e82 | 2636 | } |
43ac2ca3 JM |
2637 | if (bss->ies) { |
2638 | memcpy(bss->ies, elems->ie_start, elems->total_len); | |
2639 | bss->ies_len = elems->total_len; | |
2640 | } else | |
2641 | bss->ies_len = 0; | |
f0706e82 | 2642 | |
43ac2ca3 | 2643 | bss->wmm_used = elems->wmm_param || elems->wmm_info; |
9d9bf77d BR |
2644 | |
2645 | /* check if we need to merge IBSS */ | |
2646 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
2647 | !local->sta_sw_scanning && !local->sta_hw_scanning && | |
fba4a1e6 | 2648 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 2649 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
2650 | elems->ssid_len == sdata->u.sta.ssid_len && |
2651 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
2652 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
2653 | if (rx_status->flag & RX_FLAG_TSFT) { |
2654 | /* in order for correct IBSS merging we need mactime | |
2655 | * | |
2656 | * since mactime is defined as the time the first data | |
2657 | * symbol of the frame hits the PHY, and the timestamp | |
2658 | * of the beacon is defined as "the time that the data | |
2659 | * symbol containing the first bit of the timestamp is | |
2660 | * transmitted to the PHY plus the transmitting STA’s | |
2661 | * delays through its local PHY from the MAC-PHY | |
2662 | * interface to its interface with the WM" | |
2663 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2664 | * the receiver - we have to take into account the | |
2665 | * offset between the two. | |
2666 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2667 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2668 | */ | |
8e1535d5 | 2669 | int rate = local->hw.wiphy->bands[band]-> |
9d9bf77d BR |
2670 | bitrates[rx_status->rate_idx].bitrate; |
2671 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2672 | } else if (local && local->ops && local->ops->get_tsf) | |
2673 | /* second best option: get current TSF */ | |
2674 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2675 | else | |
2676 | /* can't merge without knowing the TSF */ | |
2677 | rx_timestamp = -1LLU; | |
2678 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2679 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2680 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2681 | print_mac(mac, mgmt->sa), | |
2682 | print_mac(mac2, mgmt->bssid), | |
2683 | (unsigned long long)rx_timestamp, | |
2684 | (unsigned long long)beacon_timestamp, | |
2685 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2686 | jiffies); | |
2687 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2688 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 2689 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd JB |
2690 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2691 | "local TSF - IBSS merge with BSSID %s\n", | |
f698d856 | 2692 | sdata->dev->name, print_mac(mac, mgmt->bssid)); |
fba4a1e6 | 2693 | #endif |
f698d856 JBG |
2694 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
2695 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 | 2696 | mgmt->bssid, mgmt->sa, |
8e1535d5 | 2697 | supp_rates); |
9d9bf77d BR |
2698 | } |
2699 | } | |
2700 | ||
3e122be0 | 2701 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2702 | } |
2703 | ||
2704 | ||
f698d856 | 2705 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2706 | struct ieee80211_mgmt *mgmt, |
2707 | size_t len, | |
2708 | struct ieee80211_rx_status *rx_status) | |
2709 | { | |
ae6a44e3 EK |
2710 | size_t baselen; |
2711 | struct ieee802_11_elems elems; | |
9859b81e | 2712 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 2713 | |
8e7cdbb6 TW |
2714 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
2715 | return; /* ignore ProbeResp to foreign address */ | |
2716 | ||
ae6a44e3 EK |
2717 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2718 | if (baselen > len) | |
2719 | return; | |
2720 | ||
2721 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2722 | &elems); | |
2723 | ||
9859b81e RR |
2724 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2725 | ||
2726 | /* direct probe may be part of the association flow */ | |
2727 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
2728 | &ifsta->request)) { | |
2729 | printk(KERN_DEBUG "%s direct probe responded\n", | |
2730 | sdata->dev->name); | |
2731 | ieee80211_authenticate(sdata, ifsta); | |
2732 | } | |
f0706e82 JB |
2733 | } |
2734 | ||
2735 | ||
f698d856 | 2736 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2737 | struct ieee80211_mgmt *mgmt, |
2738 | size_t len, | |
2739 | struct ieee80211_rx_status *rx_status) | |
2740 | { | |
f0706e82 | 2741 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
2742 | size_t baselen; |
2743 | struct ieee802_11_elems elems; | |
f698d856 | 2744 | struct ieee80211_local *local = sdata->local; |
d3c990fb | 2745 | struct ieee80211_conf *conf = &local->hw.conf; |
471b3efd | 2746 | u32 changed = 0; |
f0706e82 | 2747 | |
ae6a44e3 EK |
2748 | /* Process beacon from the current BSS */ |
2749 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2750 | if (baselen > len) | |
2751 | return; | |
2752 | ||
2753 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
2754 | ||
9859b81e | 2755 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
f0706e82 | 2756 | |
51fb61e7 | 2757 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2758 | return; |
2759 | ifsta = &sdata->u.sta; | |
2760 | ||
d6f2da5b | 2761 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2762 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2763 | return; | |
2764 | ||
d18ef29f | 2765 | /* Do not send changes to driver if we are scanning. This removes |
fe3fa827 JB |
2766 | * requirement that a driver's bss_info_changed/conf_tx functions |
2767 | * need to be atomic. | |
2768 | * This is really ugly code, we should rewrite scanning and make | |
2769 | * all this more understandable for humans. | |
2770 | */ | |
d18ef29f RC |
2771 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
2772 | return; | |
2773 | ||
fe3fa827 JB |
2774 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
2775 | elems.wmm_param_len); | |
2776 | ||
5628221c | 2777 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2778 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
50c4afb9 JL |
2779 | else { |
2780 | u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); | |
2781 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
2782 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
2783 | } | |
f0706e82 | 2784 | |
d3c990fb | 2785 | if (elems.ht_cap_elem && elems.ht_info_elem && |
38668c05 | 2786 | elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
d3c990fb RR |
2787 | struct ieee80211_ht_bss_info bss_info; |
2788 | ||
2789 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2790 | (struct ieee80211_ht_addt_info *) | |
2791 | elems.ht_info_elem, &bss_info); | |
38668c05 TW |
2792 | changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
2793 | &bss_info); | |
d3c990fb RR |
2794 | } |
2795 | ||
471b3efd | 2796 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2797 | } |
2798 | ||
2799 | ||
f698d856 | 2800 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2801 | struct ieee80211_if_sta *ifsta, |
2802 | struct ieee80211_mgmt *mgmt, | |
2803 | size_t len, | |
2804 | struct ieee80211_rx_status *rx_status) | |
2805 | { | |
f698d856 | 2806 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2807 | int tx_last_beacon; |
2808 | struct sk_buff *skb; | |
2809 | struct ieee80211_mgmt *resp; | |
2810 | u8 *pos, *end; | |
0795af57 JP |
2811 | DECLARE_MAC_BUF(mac); |
2812 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2813 | DECLARE_MAC_BUF(mac2); | |
2814 | DECLARE_MAC_BUF(mac3); | |
2815 | #endif | |
f0706e82 | 2816 | |
51fb61e7 | 2817 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
48c2fc59 | 2818 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
2819 | len < 24 + 2 || !ifsta->probe_resp) |
2820 | return; | |
2821 | ||
2822 | if (local->ops->tx_last_beacon) | |
2823 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2824 | else | |
2825 | tx_last_beacon = 1; | |
2826 | ||
2827 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2828 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2829 | "%s (tx_last_beacon=%d)\n", | |
f698d856 | 2830 | sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
0795af57 | 2831 | print_mac(mac3, mgmt->bssid), tx_last_beacon); |
f0706e82 JB |
2832 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2833 | ||
2834 | if (!tx_last_beacon) | |
2835 | return; | |
2836 | ||
2837 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2838 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2839 | return; | |
2840 | ||
2841 | end = ((u8 *) mgmt) + len; | |
2842 | pos = mgmt->u.probe_req.variable; | |
2843 | if (pos[0] != WLAN_EID_SSID || | |
2844 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2845 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2846 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
2847 | "from %s\n", | |
f698d856 | 2848 | sdata->dev->name, print_mac(mac, mgmt->sa)); |
f4ea83dd | 2849 | #endif |
f0706e82 JB |
2850 | return; |
2851 | } | |
2852 | if (pos[1] != 0 && | |
2853 | (pos[1] != ifsta->ssid_len || | |
2854 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2855 | /* Ignore ProbeReq for foreign SSID */ | |
2856 | return; | |
2857 | } | |
2858 | ||
2859 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2860 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2861 | if (!skb) |
2862 | return; | |
2863 | ||
2864 | resp = (struct ieee80211_mgmt *) skb->data; | |
2865 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2866 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 | 2867 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
f698d856 | 2868 | sdata->dev->name, print_mac(mac, resp->da)); |
f0706e82 | 2869 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
f698d856 | 2870 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
2871 | } |
2872 | ||
f698d856 | 2873 | static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
4e20cb29 JB |
2874 | struct ieee80211_if_sta *ifsta, |
2875 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
2876 | size_t len, |
2877 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 2878 | { |
f698d856 | 2879 | struct ieee80211_local *local = sdata->local; |
f709fc69 | 2880 | |
9c80d3dc JB |
2881 | /* all categories we currently handle have action_code */ |
2882 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
9f985b0e RR |
2883 | return; |
2884 | ||
2885 | switch (mgmt->u.action.category) { | |
b6623486 AK |
2886 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
2887 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
2888 | break; | |
5fd12d4d | 2889 | switch (mgmt->u.action.u.measurement.action_code) { |
b6623486 AK |
2890 | case WLAN_ACTION_SPCT_MSR_REQ: |
2891 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2892 | sizeof(mgmt->u.action.u.measurement))) | |
2893 | break; | |
f698d856 | 2894 | ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
b6623486 AK |
2895 | break; |
2896 | } | |
2897 | break; | |
9f985b0e RR |
2898 | case WLAN_CATEGORY_BACK: |
2899 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2900 | case WLAN_ACTION_ADDBA_REQ: | |
2901 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2902 | sizeof(mgmt->u.action.u.addba_req))) | |
2903 | break; | |
f698d856 | 2904 | ieee80211_sta_process_addba_request(local, mgmt, len); |
9f985b0e | 2905 | break; |
eadc8d9e RR |
2906 | case WLAN_ACTION_ADDBA_RESP: |
2907 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2908 | sizeof(mgmt->u.action.u.addba_resp))) | |
2909 | break; | |
f698d856 | 2910 | ieee80211_sta_process_addba_resp(local, mgmt, len); |
eadc8d9e | 2911 | break; |
688b88a4 RR |
2912 | case WLAN_ACTION_DELBA: |
2913 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2914 | sizeof(mgmt->u.action.u.delba))) | |
2915 | break; | |
f698d856 | 2916 | ieee80211_sta_process_delba(sdata, mgmt, len); |
688b88a4 | 2917 | break; |
9f985b0e RR |
2918 | } |
2919 | break; | |
f709fc69 | 2920 | case PLINK_CATEGORY: |
902acc78 | 2921 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2922 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
f709fc69 | 2923 | break; |
f709fc69 | 2924 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 2925 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2926 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
f709fc69 | 2927 | break; |
9f985b0e RR |
2928 | } |
2929 | } | |
f0706e82 | 2930 | |
f698d856 | 2931 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
2932 | struct ieee80211_rx_status *rx_status) |
2933 | { | |
f698d856 | 2934 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2935 | struct ieee80211_if_sta *ifsta; |
2936 | struct ieee80211_mgmt *mgmt; | |
2937 | u16 fc; | |
2938 | ||
2939 | if (skb->len < 24) | |
2940 | goto fail; | |
2941 | ||
f0706e82 JB |
2942 | ifsta = &sdata->u.sta; |
2943 | ||
2944 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2945 | fc = le16_to_cpu(mgmt->frame_control); | |
2946 | ||
2947 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2948 | case IEEE80211_STYPE_PROBE_REQ: | |
2949 | case IEEE80211_STYPE_PROBE_RESP: | |
2950 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 2951 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2952 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
2953 | case IEEE80211_STYPE_AUTH: | |
2954 | case IEEE80211_STYPE_ASSOC_RESP: | |
2955 | case IEEE80211_STYPE_REASSOC_RESP: | |
2956 | case IEEE80211_STYPE_DEAUTH: | |
2957 | case IEEE80211_STYPE_DISASSOC: | |
2958 | skb_queue_tail(&ifsta->skb_queue, skb); | |
2959 | queue_work(local->hw.workqueue, &ifsta->work); | |
2960 | return; | |
f0706e82 JB |
2961 | } |
2962 | ||
2963 | fail: | |
2964 | kfree_skb(skb); | |
2965 | } | |
2966 | ||
f698d856 | 2967 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2968 | struct sk_buff *skb) |
2969 | { | |
2970 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
2971 | struct ieee80211_if_sta *ifsta; |
2972 | struct ieee80211_mgmt *mgmt; | |
2973 | u16 fc; | |
2974 | ||
f0706e82 JB |
2975 | ifsta = &sdata->u.sta; |
2976 | ||
2977 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2978 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2979 | fc = le16_to_cpu(mgmt->frame_control); | |
2980 | ||
2981 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2982 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 2983 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
2984 | rx_status); |
2985 | break; | |
2986 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 2987 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2988 | break; |
2989 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 2990 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2991 | break; |
2992 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 2993 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2994 | break; |
2995 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2996 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2997 | break; |
2998 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2999 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
3000 | break; |
3001 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 3002 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
3003 | break; |
3004 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 3005 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 | 3006 | break; |
9f985b0e | 3007 | case IEEE80211_STYPE_ACTION: |
f698d856 | 3008 | ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 3009 | break; |
f0706e82 JB |
3010 | } |
3011 | ||
3012 | kfree_skb(skb); | |
3013 | } | |
3014 | ||
3015 | ||
9ae54c84 | 3016 | ieee80211_rx_result |
f698d856 | 3017 | ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ece8eddd | 3018 | struct ieee80211_rx_status *rx_status) |
f0706e82 JB |
3019 | { |
3020 | struct ieee80211_mgmt *mgmt; | |
4e3996fe | 3021 | __le16 fc; |
f0706e82 | 3022 | |
ece8eddd | 3023 | if (skb->len < 2) |
e4c26add | 3024 | return RX_DROP_UNUSABLE; |
f0706e82 JB |
3025 | |
3026 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
4e3996fe | 3027 | fc = mgmt->frame_control; |
f0706e82 | 3028 | |
4e3996fe | 3029 | if (ieee80211_is_ctl(fc)) |
9ae54c84 | 3030 | return RX_CONTINUE; |
ece8eddd ZY |
3031 | |
3032 | if (skb->len < 24) | |
e4c26add | 3033 | return RX_DROP_MONITOR; |
ece8eddd | 3034 | |
4e3996fe | 3035 | if (ieee80211_is_probe_resp(fc)) { |
f698d856 | 3036 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3037 | dev_kfree_skb(skb); |
3038 | return RX_QUEUED; | |
f0706e82 | 3039 | } |
4e3996fe HH |
3040 | |
3041 | if (ieee80211_is_beacon(fc)) { | |
f698d856 | 3042 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3043 | dev_kfree_skb(skb); |
3044 | return RX_QUEUED; | |
3045 | } | |
3046 | ||
9ae54c84 | 3047 | return RX_CONTINUE; |
f0706e82 JB |
3048 | } |
3049 | ||
3050 | ||
f698d856 | 3051 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 3052 | { |
f698d856 | 3053 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3054 | int active = 0; |
3055 | struct sta_info *sta; | |
3056 | ||
d0709a65 JB |
3057 | rcu_read_lock(); |
3058 | ||
3059 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3060 | if (sta->sdata == sdata && | |
f0706e82 JB |
3061 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
3062 | jiffies)) { | |
3063 | active++; | |
3064 | break; | |
3065 | } | |
3066 | } | |
d0709a65 JB |
3067 | |
3068 | rcu_read_unlock(); | |
f0706e82 JB |
3069 | |
3070 | return active; | |
3071 | } | |
3072 | ||
3073 | ||
f698d856 | 3074 | static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
f0706e82 | 3075 | { |
f698d856 | 3076 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3077 | struct sta_info *sta, *tmp; |
be8755e1 | 3078 | LIST_HEAD(tmp_list); |
0795af57 | 3079 | DECLARE_MAC_BUF(mac); |
d0709a65 | 3080 | unsigned long flags; |
f0706e82 | 3081 | |
d0709a65 | 3082 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 3083 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 3084 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
f4ea83dd | 3085 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
0795af57 | 3086 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
f698d856 | 3087 | sdata->dev->name, print_mac(mac, sta->addr)); |
f4ea83dd | 3088 | #endif |
cb585bcc | 3089 | __sta_info_unlink(&sta); |
d0709a65 JB |
3090 | if (sta) |
3091 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 3092 | } |
d0709a65 | 3093 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 3094 | |
d0709a65 JB |
3095 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
3096 | sta_info_destroy(sta); | |
f0706e82 JB |
3097 | } |
3098 | ||
3099 | ||
f698d856 | 3100 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3101 | struct ieee80211_if_sta *ifsta) |
3102 | { | |
3103 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
3104 | ||
f698d856 JBG |
3105 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
3106 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
3107 | return; |
3108 | ||
3109 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 JBG |
3110 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
3111 | ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
3112 | } |
3113 | ||
3114 | ||
f709fc69 | 3115 | #ifdef CONFIG_MAC80211_MESH |
f698d856 | 3116 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
f709fc69 LCC |
3117 | struct ieee80211_if_sta *ifsta) |
3118 | { | |
f709fc69 LCC |
3119 | bool free_plinks; |
3120 | ||
f698d856 JBG |
3121 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
3122 | mesh_path_expire(sdata); | |
f709fc69 LCC |
3123 | |
3124 | free_plinks = mesh_plink_availables(sdata); | |
3125 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
9d139c81 | 3126 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3127 | |
3128 | mod_timer(&ifsta->timer, jiffies + | |
3129 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
3130 | } | |
3131 | ||
3132 | ||
f698d856 | 3133 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
f709fc69 LCC |
3134 | { |
3135 | struct ieee80211_if_sta *ifsta; | |
f709fc69 | 3136 | ifsta = &sdata->u.sta; |
48c2fc59 | 3137 | ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
f709fc69 | 3138 | ieee80211_sta_timer((unsigned long)sdata); |
56a6d13d | 3139 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3140 | } |
3141 | #endif | |
3142 | ||
3143 | ||
f0706e82 JB |
3144 | void ieee80211_sta_timer(unsigned long data) |
3145 | { | |
3146 | struct ieee80211_sub_if_data *sdata = | |
3147 | (struct ieee80211_sub_if_data *) data; | |
3148 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
f698d856 | 3149 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3150 | |
3151 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3152 | queue_work(local->hw.workqueue, &ifsta->work); | |
3153 | } | |
3154 | ||
f0706e82 JB |
3155 | void ieee80211_sta_work(struct work_struct *work) |
3156 | { | |
3157 | struct ieee80211_sub_if_data *sdata = | |
3158 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
f698d856 | 3159 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3160 | struct ieee80211_if_sta *ifsta; |
3161 | struct sk_buff *skb; | |
3162 | ||
f698d856 | 3163 | if (!netif_running(sdata->dev)) |
f0706e82 JB |
3164 | return; |
3165 | ||
ece8eddd | 3166 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
3167 | return; |
3168 | ||
f4ea83dd JB |
3169 | if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && |
3170 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
3171 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) | |
f0706e82 | 3172 | return; |
f0706e82 JB |
3173 | ifsta = &sdata->u.sta; |
3174 | ||
3175 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
f698d856 | 3176 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
f0706e82 | 3177 | |
f709fc69 | 3178 | #ifdef CONFIG_MAC80211_MESH |
902acc78 JB |
3179 | if (ifsta->preq_queue_len && |
3180 | time_after(jiffies, | |
3181 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
f698d856 | 3182 | mesh_path_start_discovery(sdata); |
f709fc69 LCC |
3183 | #endif |
3184 | ||
9859b81e RR |
3185 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
3186 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
48c2fc59 | 3187 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && |
f0706e82 | 3188 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { |
a0af5f14 | 3189 | if (ifsta->scan_ssid_len) |
f698d856 | 3190 | ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
a0af5f14 | 3191 | else |
f698d856 | 3192 | ieee80211_sta_start_scan(sdata, NULL, 0); |
f0706e82 JB |
3193 | return; |
3194 | } | |
3195 | ||
3196 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
f698d856 | 3197 | if (ieee80211_sta_config_auth(sdata, ifsta)) |
f0706e82 JB |
3198 | return; |
3199 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3200 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3201 | return; | |
3202 | ||
3203 | switch (ifsta->state) { | |
48c2fc59 | 3204 | case IEEE80211_STA_MLME_DISABLED: |
f0706e82 | 3205 | break; |
9859b81e RR |
3206 | case IEEE80211_STA_MLME_DIRECT_PROBE: |
3207 | ieee80211_direct_probe(sdata, ifsta); | |
3208 | break; | |
48c2fc59 | 3209 | case IEEE80211_STA_MLME_AUTHENTICATE: |
f698d856 | 3210 | ieee80211_authenticate(sdata, ifsta); |
f0706e82 | 3211 | break; |
48c2fc59 | 3212 | case IEEE80211_STA_MLME_ASSOCIATE: |
f698d856 | 3213 | ieee80211_associate(sdata, ifsta); |
f0706e82 | 3214 | break; |
48c2fc59 | 3215 | case IEEE80211_STA_MLME_ASSOCIATED: |
f698d856 | 3216 | ieee80211_associated(sdata, ifsta); |
f0706e82 | 3217 | break; |
48c2fc59 | 3218 | case IEEE80211_STA_MLME_IBSS_SEARCH: |
f698d856 | 3219 | ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3220 | break; |
48c2fc59 | 3221 | case IEEE80211_STA_MLME_IBSS_JOINED: |
f698d856 | 3222 | ieee80211_sta_merge_ibss(sdata, ifsta); |
f0706e82 | 3223 | break; |
f709fc69 | 3224 | #ifdef CONFIG_MAC80211_MESH |
48c2fc59 | 3225 | case IEEE80211_STA_MLME_MESH_UP: |
f698d856 | 3226 | ieee80211_mesh_housekeeping(sdata, ifsta); |
f709fc69 LCC |
3227 | break; |
3228 | #endif | |
f0706e82 | 3229 | default: |
f4ea83dd | 3230 | WARN_ON(1); |
f0706e82 JB |
3231 | break; |
3232 | } | |
3233 | ||
f698d856 | 3234 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 3235 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
f698d856 | 3236 | "mixed-cell disabled - disassociate\n", sdata->dev->name); |
f0706e82 | 3237 | |
aa458d17 TW |
3238 | ieee80211_set_disassoc(sdata, ifsta, false, true, |
3239 | WLAN_REASON_UNSPECIFIED); | |
f0706e82 JB |
3240 | } |
3241 | } | |
3242 | ||
3243 | ||
f698d856 | 3244 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3245 | struct ieee80211_if_sta *ifsta) |
3246 | { | |
f698d856 | 3247 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3248 | |
3249 | if (local->ops->reset_tsf) { | |
3250 | /* Reset own TSF to allow time synchronization work. */ | |
3251 | local->ops->reset_tsf(local_to_hw(local)); | |
3252 | } | |
3253 | ||
3254 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
3255 | ||
3256 | ||
3257 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
3258 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3259 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
3260 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
3261 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
3262 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
3263 | else | |
3264 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 3265 | ifsta->auth_transaction = -1; |
d6f2da5b | 3266 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 3267 | ifsta->assoc_scan_tries = 0; |
9859b81e | 3268 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
3269 | ifsta->auth_tries = 0; |
3270 | ifsta->assoc_tries = 0; | |
f698d856 | 3271 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
3272 | } |
3273 | ||
3274 | ||
f698d856 | 3275 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3276 | struct ieee80211_if_sta *ifsta) |
3277 | { | |
f698d856 | 3278 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3279 | |
51fb61e7 | 3280 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3281 | return; |
3282 | ||
d6f2da5b | 3283 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3b7ee69d | 3284 | IEEE80211_STA_AUTO_BSSID_SEL)) && |
d6f2da5b | 3285 | (ifsta->flags & (IEEE80211_STA_SSID_SET | |
3b7ee69d TW |
3286 | IEEE80211_STA_AUTO_SSID_SEL))) { |
3287 | ||
3288 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) | |
3289 | ieee80211_set_disassoc(sdata, ifsta, true, true, | |
3290 | WLAN_REASON_DEAUTH_LEAVING); | |
3291 | ||
f0706e82 JB |
3292 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3293 | queue_work(local->hw.workqueue, &ifsta->work); | |
3294 | } | |
3295 | } | |
3296 | ||
3297 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
3298 | const char *ssid, int ssid_len) | |
3299 | { | |
3300 | int tmp, hidden_ssid; | |
3301 | ||
48225709 MW |
3302 | if (ssid_len == ifsta->ssid_len && |
3303 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
3304 | return 1; |
3305 | ||
d6f2da5b | 3306 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
3307 | return 0; |
3308 | ||
3309 | hidden_ssid = 1; | |
3310 | tmp = ssid_len; | |
3311 | while (tmp--) { | |
3312 | if (ssid[tmp] != '\0') { | |
3313 | hidden_ssid = 0; | |
3314 | break; | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
3319 | return 1; | |
3320 | ||
3321 | if (ssid_len == 1 && ssid[0] == ' ') | |
3322 | return 1; | |
3323 | ||
3324 | return 0; | |
3325 | } | |
3326 | ||
f698d856 | 3327 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3328 | struct ieee80211_if_sta *ifsta) |
3329 | { | |
f698d856 | 3330 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3331 | struct ieee80211_sta_bss *bss, *selected = NULL; |
3332 | int top_rssi = 0, freq; | |
3333 | ||
f0706e82 | 3334 | spin_lock_bh(&local->sta_bss_lock); |
8318d78a | 3335 | freq = local->oper_channel->center_freq; |
f0706e82 JB |
3336 | list_for_each_entry(bss, &local->sta_bss_list, list) { |
3337 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
3338 | continue; | |
3339 | ||
34a961f7 AK |
3340 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
3341 | IEEE80211_STA_AUTO_BSSID_SEL | | |
3342 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
3343 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
3344 | !!sdata->default_key)) | |
f0706e82 JB |
3345 | continue; |
3346 | ||
d6f2da5b JS |
3347 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
3348 | bss->freq != freq) | |
f0706e82 JB |
3349 | continue; |
3350 | ||
d6f2da5b | 3351 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
3352 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
3353 | continue; | |
3354 | ||
d6f2da5b | 3355 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
3356 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
3357 | continue; | |
3358 | ||
566bfe5a | 3359 | if (!selected || top_rssi < bss->signal) { |
f0706e82 | 3360 | selected = bss; |
566bfe5a | 3361 | top_rssi = bss->signal; |
f0706e82 JB |
3362 | } |
3363 | } | |
3364 | if (selected) | |
3365 | atomic_inc(&selected->users); | |
3366 | spin_unlock_bh(&local->sta_bss_lock); | |
3367 | ||
3368 | if (selected) { | |
f698d856 | 3369 | ieee80211_set_freq(sdata, selected->freq); |
d6f2da5b | 3370 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f698d856 | 3371 | ieee80211_sta_set_ssid(sdata, selected->ssid, |
f0706e82 | 3372 | selected->ssid_len); |
f698d856 JBG |
3373 | ieee80211_sta_set_bssid(sdata, selected->bssid); |
3374 | ieee80211_sta_def_wmm_params(sdata, selected, 0); | |
9859b81e RR |
3375 | |
3376 | /* Send out direct probe if no probe resp was received or | |
3377 | * the one we have is outdated | |
3378 | */ | |
3379 | if (!selected->last_probe_resp || | |
3380 | time_after(jiffies, selected->last_probe_resp | |
3381 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3382 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
3383 | else | |
3384 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
3385 | ||
3e122be0 | 3386 | ieee80211_rx_bss_put(local, selected); |
f698d856 | 3387 | ieee80211_sta_reset_auth(sdata, ifsta); |
f0706e82 JB |
3388 | return 0; |
3389 | } else { | |
6042a3e3 RR |
3390 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
3391 | ifsta->assoc_scan_tries++; | |
d6f2da5b | 3392 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
f698d856 | 3393 | ieee80211_sta_start_scan(sdata, NULL, 0); |
b9bf1e60 | 3394 | else |
f698d856 | 3395 | ieee80211_sta_start_scan(sdata, ifsta->ssid, |
b9bf1e60 | 3396 | ifsta->ssid_len); |
48c2fc59 | 3397 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 JB |
3398 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3399 | } else | |
48c2fc59 | 3400 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 | 3401 | } |
f0706e82 JB |
3402 | return -1; |
3403 | } | |
3404 | ||
f0706e82 | 3405 | |
f698d856 | 3406 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3407 | struct ieee80211_if_sta *ifsta) |
3408 | { | |
f698d856 | 3409 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3410 | struct ieee80211_sta_bss *bss; |
8318d78a | 3411 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3412 | u8 bssid[ETH_ALEN], *pos; |
3413 | int i; | |
167ad6f7 | 3414 | int ret; |
0795af57 | 3415 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3416 | |
3417 | #if 0 | |
3418 | /* Easier testing, use fixed BSSID. */ | |
3419 | memset(bssid, 0xfe, ETH_ALEN); | |
3420 | #else | |
3421 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
3422 | * own MAC address to make sure that devices that do not have proper | |
3423 | * random number generator get different BSSID. */ | |
3424 | get_random_bytes(bssid, ETH_ALEN); | |
3425 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 3426 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
3427 | bssid[0] &= ~0x01; |
3428 | bssid[0] |= 0x02; | |
3429 | #endif | |
3430 | ||
0795af57 | 3431 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
f698d856 | 3432 | sdata->dev->name, print_mac(mac, bssid)); |
f0706e82 | 3433 | |
f698d856 | 3434 | bss = ieee80211_rx_bss_add(sdata, bssid, |
8318d78a | 3435 | local->hw.conf.channel->center_freq, |
cffdd30d | 3436 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
3437 | if (!bss) |
3438 | return -ENOMEM; | |
3439 | ||
8318d78a JB |
3440 | bss->band = local->hw.conf.channel->band; |
3441 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
3442 | |
3443 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 3444 | local->hw.conf.beacon_int = 100; |
f0706e82 | 3445 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
3446 | bss->last_update = jiffies; |
3447 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
3448 | |
3449 | if (sdata->default_key) | |
f0706e82 | 3450 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 3451 | else |
f0706e82 | 3452 | sdata->drop_unencrypted = 0; |
988c0f72 | 3453 | |
8318d78a | 3454 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 3455 | pos = bss->supp_rates; |
8318d78a JB |
3456 | for (i = 0; i < sband->n_bitrates; i++) { |
3457 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
3458 | *pos++ = (u8) (rate / 5); |
3459 | } | |
3460 | ||
f698d856 | 3461 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 3462 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3463 | return ret; |
f0706e82 JB |
3464 | } |
3465 | ||
3466 | ||
f698d856 | 3467 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3468 | struct ieee80211_if_sta *ifsta) |
3469 | { | |
f698d856 | 3470 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3471 | struct ieee80211_sta_bss *bss; |
3472 | int found = 0; | |
3473 | u8 bssid[ETH_ALEN]; | |
3474 | int active_ibss; | |
0795af57 JP |
3475 | DECLARE_MAC_BUF(mac); |
3476 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
3477 | |
3478 | if (ifsta->ssid_len == 0) | |
3479 | return -EINVAL; | |
3480 | ||
f698d856 | 3481 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
3482 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3483 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 3484 | sdata->dev->name, active_ibss); |
f0706e82 JB |
3485 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3486 | spin_lock_bh(&local->sta_bss_lock); | |
3487 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3488 | if (ifsta->ssid_len != bss->ssid_len || | |
3489 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
3490 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
3491 | continue; | |
3492 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3493 | printk(KERN_DEBUG " bssid=%s found\n", |
3494 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
3495 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3496 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
3497 | found = 1; | |
3498 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
3499 | break; | |
3500 | } | |
3501 | spin_unlock_bh(&local->sta_bss_lock); | |
3502 | ||
3503 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b VK |
3504 | if (found) |
3505 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " | |
3506 | "%s\n", print_mac(mac, bssid), | |
3507 | print_mac(mac2, ifsta->bssid)); | |
f0706e82 | 3508 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
3509 | |
3510 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 3511 | int ret; |
80693ceb DD |
3512 | int search_freq; |
3513 | ||
3514 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
3515 | search_freq = bss->freq; | |
3516 | else | |
3517 | search_freq = local->hw.conf.channel->center_freq; | |
3518 | ||
f698d856 | 3519 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
3520 | ifsta->ssid, ifsta->ssid_len); |
3521 | if (!bss) | |
3522 | goto dont_join; | |
3523 | ||
0795af57 | 3524 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 3525 | " based on configured SSID\n", |
f698d856 JBG |
3526 | sdata->dev->name, print_mac(mac, bssid)); |
3527 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); | |
3e122be0 | 3528 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3529 | return ret; |
f0706e82 | 3530 | } |
80693ceb DD |
3531 | |
3532 | dont_join: | |
f0706e82 JB |
3533 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3534 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
3535 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3536 | ||
3537 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 3538 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 3539 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
3540 | mod_timer(&ifsta->timer, jiffies + |
3541 | IEEE80211_IBSS_MERGE_INTERVAL); | |
3542 | } else if (time_after(jiffies, local->last_scan_completed + | |
3543 | IEEE80211_SCAN_INTERVAL)) { | |
3544 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 JBG |
3545 | "join\n", sdata->dev->name); |
3546 | return ieee80211_sta_req_scan(sdata, ifsta->ssid, | |
f0706e82 | 3547 | ifsta->ssid_len); |
48c2fc59 | 3548 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
3549 | int interval = IEEE80211_SCAN_INTERVAL; |
3550 | ||
3551 | if (time_after(jiffies, ifsta->ibss_join_req + | |
3552 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 3553 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
3554 | (!(local->oper_channel->flags & |
3555 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 3556 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 3557 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 3558 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 3559 | " %d MHz\n", sdata->dev->name, |
8318d78a | 3560 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
3561 | } |
3562 | ||
3563 | /* No IBSS found - decrease scan interval and continue | |
3564 | * scanning. */ | |
3565 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
3566 | } | |
3567 | ||
48c2fc59 | 3568 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
3569 | mod_timer(&ifsta->timer, jiffies + interval); |
3570 | return 0; | |
3571 | } | |
3572 | ||
3573 | return 0; | |
3574 | } | |
3575 | ||
3576 | ||
f698d856 | 3577 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
f0706e82 | 3578 | { |
f0706e82 | 3579 | struct ieee80211_if_sta *ifsta; |
9d139c81 | 3580 | int res; |
f0706e82 JB |
3581 | |
3582 | if (len > IEEE80211_MAX_SSID_LEN) | |
3583 | return -EINVAL; | |
3584 | ||
f0706e82 JB |
3585 | ifsta = &sdata->u.sta; |
3586 | ||
9d139c81 JB |
3587 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
3588 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
3589 | memcpy(ifsta->ssid, ssid, len); | |
3590 | ifsta->ssid_len = len; | |
d6f2da5b | 3591 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
9d139c81 JB |
3592 | |
3593 | res = 0; | |
3594 | /* | |
3595 | * Hack! MLME code needs to be cleaned up to have different | |
3596 | * entry points for configuration and internal selection change | |
3597 | */ | |
3598 | if (netif_running(sdata->dev)) | |
3599 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
3600 | if (res) { | |
3601 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
f698d856 | 3602 | "the low-level driver\n", sdata->dev->name); |
9d139c81 JB |
3603 | return res; |
3604 | } | |
3605 | } | |
f0706e82 | 3606 | |
d6f2da5b JS |
3607 | if (len) |
3608 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3609 | else | |
3610 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
9d139c81 | 3611 | |
51fb61e7 | 3612 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3613 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 | 3614 | ifsta->ibss_join_req = jiffies; |
48c2fc59 | 3615 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f698d856 | 3616 | return ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3617 | } |
9d139c81 | 3618 | |
f0706e82 JB |
3619 | return 0; |
3620 | } | |
3621 | ||
3622 | ||
f698d856 | 3623 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
f0706e82 | 3624 | { |
f0706e82 JB |
3625 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
3626 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3627 | *len = ifsta->ssid_len; | |
3628 | return 0; | |
3629 | } | |
3630 | ||
3631 | ||
f698d856 | 3632 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
f0706e82 | 3633 | { |
f0706e82 JB |
3634 | struct ieee80211_if_sta *ifsta; |
3635 | int res; | |
3636 | ||
f0706e82 JB |
3637 | ifsta = &sdata->u.sta; |
3638 | ||
3639 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3640 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
9d139c81 JB |
3641 | res = 0; |
3642 | /* | |
3643 | * Hack! See also ieee80211_sta_set_ssid. | |
3644 | */ | |
3645 | if (netif_running(sdata->dev)) | |
3646 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
f0706e82 JB |
3647 | if (res) { |
3648 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
f698d856 | 3649 | "the low-level driver\n", sdata->dev->name); |
f0706e82 JB |
3650 | return res; |
3651 | } | |
3652 | } | |
3653 | ||
d6f2da5b JS |
3654 | if (is_valid_ether_addr(bssid)) |
3655 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3656 | else |
d6f2da5b JS |
3657 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3658 | ||
f0706e82 JB |
3659 | return 0; |
3660 | } | |
3661 | ||
3662 | ||
3663 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3664 | struct ieee80211_sub_if_data *sdata, | |
3665 | int powersave) | |
3666 | { | |
3667 | struct sk_buff *skb; | |
3668 | struct ieee80211_hdr *nullfunc; | |
4e3996fe | 3669 | __le16 fc; |
f0706e82 JB |
3670 | |
3671 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3672 | if (!skb) { | |
3673 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3674 | "frame\n", sdata->dev->name); | |
3675 | return; | |
3676 | } | |
3677 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3678 | ||
3679 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3680 | memset(nullfunc, 0, 24); | |
4e3996fe HH |
3681 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
3682 | IEEE80211_FCTL_TODS); | |
f0706e82 | 3683 | if (powersave) |
4e3996fe HH |
3684 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
3685 | nullfunc->frame_control = fc; | |
f0706e82 JB |
3686 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); |
3687 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3688 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3689 | ||
f698d856 | 3690 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
3691 | } |
3692 | ||
3693 | ||
69d3b6f4 JB |
3694 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3695 | { | |
3696 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
3697 | ieee80211_vif_is_mesh(&sdata->vif)) | |
3698 | ieee80211_sta_timer((unsigned long)sdata); | |
3699 | } | |
3700 | ||
f0706e82 JB |
3701 | void ieee80211_scan_completed(struct ieee80211_hw *hw) |
3702 | { | |
3703 | struct ieee80211_local *local = hw_to_local(hw); | |
3704 | struct net_device *dev = local->scan_dev; | |
3705 | struct ieee80211_sub_if_data *sdata; | |
3706 | union iwreq_data wrqu; | |
3707 | ||
3708 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3709 | memset(&wrqu, 0, sizeof(wrqu)); |
3710 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3711 | |
ece8eddd ZY |
3712 | if (local->sta_hw_scanning) { |
3713 | local->sta_hw_scanning = 0; | |
675ef586 MA |
3714 | if (ieee80211_hw_config(local)) |
3715 | printk(KERN_DEBUG "%s: failed to restore operational " | |
3716 | "channel after scan\n", dev->name); | |
69d3b6f4 JB |
3717 | /* Restart STA timer for HW scan case */ |
3718 | rcu_read_lock(); | |
3719 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3720 | ieee80211_restart_sta_timer(sdata); | |
3721 | rcu_read_unlock(); | |
3722 | ||
ece8eddd ZY |
3723 | goto done; |
3724 | } | |
3725 | ||
3726 | local->sta_sw_scanning = 0; | |
f0706e82 | 3727 | if (ieee80211_hw_config(local)) |
4b50e388 | 3728 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3729 | "channel after scan\n", dev->name); |
3730 | ||
4150c572 JB |
3731 | |
3732 | netif_tx_lock_bh(local->mdev); | |
e308a5d8 | 3733 | netif_addr_lock(local->mdev); |
4150c572 JB |
3734 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; |
3735 | local->ops->configure_filter(local_to_hw(local), | |
3736 | FIF_BCN_PRBRESP_PROMISC, | |
3737 | &local->filter_flags, | |
3738 | local->mdev->mc_count, | |
3739 | local->mdev->mc_list); | |
3740 | ||
e308a5d8 | 3741 | netif_addr_unlock(local->mdev); |
4150c572 | 3742 | netif_tx_unlock_bh(local->mdev); |
f0706e82 | 3743 | |
79010420 JB |
3744 | rcu_read_lock(); |
3745 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
69d3b6f4 JB |
3746 | /* Tell AP we're back */ |
3747 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && | |
3748 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) | |
3749 | ieee80211_send_nullfunc(local, sdata, 0); | |
14042cbe | 3750 | |
69d3b6f4 | 3751 | ieee80211_restart_sta_timer(sdata); |
f709fc69 | 3752 | |
f0706e82 JB |
3753 | netif_wake_queue(sdata->dev); |
3754 | } | |
79010420 | 3755 | rcu_read_unlock(); |
f0706e82 | 3756 | |
ece8eddd | 3757 | done: |
f0706e82 | 3758 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3759 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3760 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3761 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
48c2fc59 | 3762 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && |
f698d856 JBG |
3763 | !ieee80211_sta_active_ibss(sdata))) |
3764 | ieee80211_sta_find_ibss(sdata, ifsta); | |
f0706e82 JB |
3765 | } |
3766 | } | |
3767 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3768 | ||
3769 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3770 | { | |
3771 | struct ieee80211_local *local = | |
3772 | container_of(work, struct ieee80211_local, scan_work.work); | |
3773 | struct net_device *dev = local->scan_dev; | |
3774 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
8318d78a | 3775 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3776 | struct ieee80211_channel *chan; |
3777 | int skip; | |
3778 | unsigned long next_delay = 0; | |
3779 | ||
ece8eddd | 3780 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3781 | return; |
3782 | ||
3783 | switch (local->scan_state) { | |
3784 | case SCAN_SET_CHANNEL: | |
69d464d5 JB |
3785 | /* |
3786 | * Get current scan band. scan_band may be IEEE80211_NUM_BANDS | |
3787 | * after we successfully scanned the last channel of the last | |
3788 | * band (and the last band is supported by the hw) | |
3789 | */ | |
8318d78a JB |
3790 | if (local->scan_band < IEEE80211_NUM_BANDS) |
3791 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3792 | else | |
3793 | sband = NULL; | |
3794 | ||
69d464d5 JB |
3795 | /* |
3796 | * If we are at an unsupported band and have more bands | |
3797 | * left to scan, advance to the next supported one. | |
3798 | */ | |
3799 | while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { | |
8318d78a JB |
3800 | local->scan_band++; |
3801 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3802 | local->scan_channel_idx = 0; | |
3803 | } | |
3804 | ||
69d464d5 JB |
3805 | /* if no more bands/channels left, complete scan */ |
3806 | if (!sband || local->scan_channel_idx >= sband->n_channels) { | |
f0706e82 JB |
3807 | ieee80211_scan_completed(local_to_hw(local)); |
3808 | return; | |
3809 | } | |
8318d78a JB |
3810 | skip = 0; |
3811 | chan = &sband->channels[local->scan_channel_idx]; | |
3812 | ||
3813 | if (chan->flags & IEEE80211_CHAN_DISABLED || | |
51fb61e7 | 3814 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
8318d78a | 3815 | chan->flags & IEEE80211_CHAN_NO_IBSS)) |
f0706e82 JB |
3816 | skip = 1; |
3817 | ||
3818 | if (!skip) { | |
f0706e82 JB |
3819 | local->scan_channel = chan; |
3820 | if (ieee80211_hw_config(local)) { | |
8318d78a JB |
3821 | printk(KERN_DEBUG "%s: failed to set freq to " |
3822 | "%d MHz for scan\n", dev->name, | |
3823 | chan->center_freq); | |
f0706e82 JB |
3824 | skip = 1; |
3825 | } | |
3826 | } | |
3827 | ||
69d464d5 | 3828 | /* advance state machine to next channel/band */ |
f0706e82 | 3829 | local->scan_channel_idx++; |
8318d78a | 3830 | if (local->scan_channel_idx >= sband->n_channels) { |
69d464d5 JB |
3831 | /* |
3832 | * scan_band may end up == IEEE80211_NUM_BANDS, but | |
3833 | * we'll catch that case above and complete the scan | |
3834 | * if that is the case. | |
3835 | */ | |
8318d78a JB |
3836 | local->scan_band++; |
3837 | local->scan_channel_idx = 0; | |
f0706e82 JB |
3838 | } |
3839 | ||
3840 | if (skip) | |
3841 | break; | |
3842 | ||
3843 | next_delay = IEEE80211_PROBE_DELAY + | |
3844 | usecs_to_jiffies(local->hw.channel_change_time); | |
3845 | local->scan_state = SCAN_SEND_PROBE; | |
3846 | break; | |
3847 | case SCAN_SEND_PROBE: | |
8318d78a | 3848 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
f0706e82 | 3849 | local->scan_state = SCAN_SET_CHANNEL; |
8318d78a JB |
3850 | |
3851 | if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
3852 | break; | |
f698d856 | 3853 | ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, |
8318d78a JB |
3854 | local->scan_ssid_len); |
3855 | next_delay = IEEE80211_CHANNEL_TIME; | |
f0706e82 JB |
3856 | break; |
3857 | } | |
3858 | ||
ece8eddd | 3859 | if (local->sta_sw_scanning) |
f0706e82 JB |
3860 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3861 | next_delay); | |
3862 | } | |
3863 | ||
3864 | ||
f698d856 | 3865 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata, |
f0706e82 JB |
3866 | u8 *ssid, size_t ssid_len) |
3867 | { | |
f698d856 | 3868 | struct ieee80211_local *local = scan_sdata->local; |
f0706e82 JB |
3869 | struct ieee80211_sub_if_data *sdata; |
3870 | ||
3871 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3872 | return -EINVAL; | |
3873 | ||
3874 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3875 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3876 | * BSSID: MACAddress | |
3877 | * SSID | |
3878 | * ScanType: ACTIVE, PASSIVE | |
3879 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3880 | * a Probe frame during active scanning | |
3881 | * ChannelList | |
3882 | * MinChannelTime (>= ProbeDelay), in TU | |
3883 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3884 | */ | |
3885 | ||
3886 | /* MLME-SCAN.confirm | |
3887 | * BSSDescriptionSet | |
3888 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3889 | */ | |
3890 | ||
ece8eddd | 3891 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 3892 | if (local->scan_dev == scan_sdata->dev) |
f0706e82 JB |
3893 | return 0; |
3894 | return -EBUSY; | |
3895 | } | |
3896 | ||
3897 | if (local->ops->hw_scan) { | |
3898 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3899 | ssid, ssid_len); |
f0706e82 | 3900 | if (!rc) { |
ece8eddd | 3901 | local->sta_hw_scanning = 1; |
f698d856 | 3902 | local->scan_dev = scan_sdata->dev; |
f0706e82 JB |
3903 | } |
3904 | return rc; | |
3905 | } | |
3906 | ||
ece8eddd | 3907 | local->sta_sw_scanning = 1; |
f0706e82 | 3908 | |
79010420 JB |
3909 | rcu_read_lock(); |
3910 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
f0706e82 | 3911 | netif_stop_queue(sdata->dev); |
51fb61e7 | 3912 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 3913 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3914 | ieee80211_send_nullfunc(local, sdata, 1); |
3915 | } | |
79010420 | 3916 | rcu_read_unlock(); |
f0706e82 JB |
3917 | |
3918 | if (ssid) { | |
3919 | local->scan_ssid_len = ssid_len; | |
3920 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3921 | } else | |
3922 | local->scan_ssid_len = 0; | |
3923 | local->scan_state = SCAN_SET_CHANNEL; | |
f0706e82 | 3924 | local->scan_channel_idx = 0; |
8318d78a | 3925 | local->scan_band = IEEE80211_BAND_2GHZ; |
f698d856 | 3926 | local->scan_dev = scan_sdata->dev; |
f0706e82 | 3927 | |
b9e40857 | 3928 | netif_addr_lock_bh(local->mdev); |
4150c572 JB |
3929 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; |
3930 | local->ops->configure_filter(local_to_hw(local), | |
3931 | FIF_BCN_PRBRESP_PROMISC, | |
3932 | &local->filter_flags, | |
3933 | local->mdev->mc_count, | |
3934 | local->mdev->mc_list); | |
b9e40857 | 3935 | netif_addr_unlock_bh(local->mdev); |
f0706e82 JB |
3936 | |
3937 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
3938 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
3939 | IEEE80211_CHANNEL_TIME); | |
3940 | ||
3941 | return 0; | |
3942 | } | |
3943 | ||
3944 | ||
f698d856 | 3945 | int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len) |
f0706e82 | 3946 | { |
f0706e82 | 3947 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 3948 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3949 | |
51fb61e7 | 3950 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f698d856 | 3951 | return ieee80211_sta_start_scan(sdata, ssid, ssid_len); |
f0706e82 | 3952 | |
ece8eddd | 3953 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 3954 | if (local->scan_dev == sdata->dev) |
f0706e82 JB |
3955 | return 0; |
3956 | return -EBUSY; | |
3957 | } | |
3958 | ||
a0af5f14 HS |
3959 | ifsta->scan_ssid_len = ssid_len; |
3960 | if (ssid_len) | |
3961 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
3962 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
3963 | queue_work(local->hw.workqueue, &ifsta->work); | |
3964 | return 0; | |
3965 | } | |
3966 | ||
43ac2ca3 JM |
3967 | |
3968 | static void ieee80211_sta_add_scan_ies(struct iw_request_info *info, | |
3969 | struct ieee80211_sta_bss *bss, | |
3970 | char **current_ev, char *end_buf) | |
3971 | { | |
3972 | u8 *pos, *end, *next; | |
3973 | struct iw_event iwe; | |
3974 | ||
3975 | if (bss == NULL || bss->ies == NULL) | |
3976 | return; | |
3977 | ||
3978 | /* | |
3979 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
3980 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
3981 | */ | |
3982 | pos = bss->ies; | |
3983 | end = pos + bss->ies_len; | |
3984 | ||
3985 | while (end - pos > IW_GENERIC_IE_MAX) { | |
3986 | next = pos + 2 + pos[1]; | |
3987 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
3988 | next = next + 2 + next[1]; | |
3989 | ||
3990 | memset(&iwe, 0, sizeof(iwe)); | |
3991 | iwe.cmd = IWEVGENIE; | |
3992 | iwe.u.data.length = next - pos; | |
3993 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
3994 | end_buf, &iwe, pos); | |
3995 | ||
3996 | pos = next; | |
3997 | } | |
3998 | ||
3999 | if (end > pos) { | |
4000 | memset(&iwe, 0, sizeof(iwe)); | |
4001 | iwe.cmd = IWEVGENIE; | |
4002 | iwe.u.data.length = end - pos; | |
4003 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
4004 | end_buf, &iwe, pos); | |
4005 | } | |
4006 | } | |
4007 | ||
4008 | ||
f0706e82 | 4009 | static char * |
f698d856 | 4010 | ieee80211_sta_scan_result(struct ieee80211_local *local, |
ccc58057 | 4011 | struct iw_request_info *info, |
f0706e82 JB |
4012 | struct ieee80211_sta_bss *bss, |
4013 | char *current_ev, char *end_buf) | |
4014 | { | |
f0706e82 JB |
4015 | struct iw_event iwe; |
4016 | ||
4017 | if (time_after(jiffies, | |
4018 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
4019 | return current_ev; | |
4020 | ||
f0706e82 JB |
4021 | memset(&iwe, 0, sizeof(iwe)); |
4022 | iwe.cmd = SIOCGIWAP; | |
4023 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
4024 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
ccc58057 | 4025 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4026 | IW_EV_ADDR_LEN); |
4027 | ||
4028 | memset(&iwe, 0, sizeof(iwe)); | |
4029 | iwe.cmd = SIOCGIWESSID; | |
902acc78 JB |
4030 | if (bss_mesh_cfg(bss)) { |
4031 | iwe.u.data.length = bss_mesh_id_len(bss); | |
f709fc69 | 4032 | iwe.u.data.flags = 1; |
ccc58057 DM |
4033 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4034 | &iwe, bss_mesh_id(bss)); | |
f709fc69 LCC |
4035 | } else { |
4036 | iwe.u.data.length = bss->ssid_len; | |
4037 | iwe.u.data.flags = 1; | |
ccc58057 DM |
4038 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4039 | &iwe, bss->ssid); | |
f709fc69 | 4040 | } |
f0706e82 | 4041 | |
1d1b5359 LCC |
4042 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
4043 | || bss_mesh_cfg(bss)) { | |
f0706e82 JB |
4044 | memset(&iwe, 0, sizeof(iwe)); |
4045 | iwe.cmd = SIOCGIWMODE; | |
902acc78 | 4046 | if (bss_mesh_cfg(bss)) |
f709fc69 LCC |
4047 | iwe.u.mode = IW_MODE_MESH; |
4048 | else if (bss->capability & WLAN_CAPABILITY_ESS) | |
f0706e82 JB |
4049 | iwe.u.mode = IW_MODE_MASTER; |
4050 | else | |
4051 | iwe.u.mode = IW_MODE_ADHOC; | |
ccc58057 DM |
4052 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
4053 | &iwe, IW_EV_UINT_LEN); | |
f0706e82 JB |
4054 | } |
4055 | ||
4056 | memset(&iwe, 0, sizeof(iwe)); | |
4057 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4058 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); |
4059 | iwe.u.freq.e = 0; | |
ccc58057 | 4060 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4061 | IW_EV_FREQ_LEN); |
8318d78a JB |
4062 | |
4063 | memset(&iwe, 0, sizeof(iwe)); | |
4064 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4065 | iwe.u.freq.m = bss->freq; |
4066 | iwe.u.freq.e = 6; | |
ccc58057 | 4067 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4068 | IW_EV_FREQ_LEN); |
f0706e82 JB |
4069 | memset(&iwe, 0, sizeof(iwe)); |
4070 | iwe.cmd = IWEVQUAL; | |
566bfe5a BR |
4071 | iwe.u.qual.qual = bss->qual; |
4072 | iwe.u.qual.level = bss->signal; | |
f0706e82 JB |
4073 | iwe.u.qual.noise = bss->noise; |
4074 | iwe.u.qual.updated = local->wstats_flags; | |
ccc58057 | 4075 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4076 | IW_EV_QUAL_LEN); |
4077 | ||
4078 | memset(&iwe, 0, sizeof(iwe)); | |
4079 | iwe.cmd = SIOCGIWENCODE; | |
4080 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
4081 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
4082 | else | |
4083 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
4084 | iwe.u.data.length = 0; | |
ccc58057 DM |
4085 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4086 | &iwe, ""); | |
f0706e82 | 4087 | |
43ac2ca3 | 4088 | ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf); |
e623157b | 4089 | |
f0706e82 JB |
4090 | if (bss && bss->supp_rates_len > 0) { |
4091 | /* display all supported rates in readable format */ | |
ccc58057 | 4092 | char *p = current_ev + iwe_stream_lcp_len(info); |
f0706e82 JB |
4093 | int i; |
4094 | ||
4095 | memset(&iwe, 0, sizeof(iwe)); | |
4096 | iwe.cmd = SIOCGIWRATE; | |
4097 | /* Those two flags are ignored... */ | |
4098 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
4099 | ||
4100 | for (i = 0; i < bss->supp_rates_len; i++) { | |
4101 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
4102 | 0x7f) * 500000); | |
ccc58057 | 4103 | p = iwe_stream_add_value(info, current_ev, p, |
f0706e82 JB |
4104 | end_buf, &iwe, IW_EV_PARAM_LEN); |
4105 | } | |
4106 | current_ev = p; | |
4107 | } | |
4108 | ||
4109 | if (bss) { | |
4110 | char *buf; | |
4111 | buf = kmalloc(30, GFP_ATOMIC); | |
4112 | if (buf) { | |
4113 | memset(&iwe, 0, sizeof(iwe)); | |
4114 | iwe.cmd = IWEVCUSTOM; | |
4115 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
4116 | iwe.u.data.length = strlen(buf); | |
ccc58057 DM |
4117 | current_ev = iwe_stream_add_point(info, current_ev, |
4118 | end_buf, | |
f0706e82 | 4119 | &iwe, buf); |
bf998f68 EG |
4120 | memset(&iwe, 0, sizeof(iwe)); |
4121 | iwe.cmd = IWEVCUSTOM; | |
4122 | sprintf(buf, " Last beacon: %dms ago", | |
4123 | jiffies_to_msecs(jiffies - bss->last_update)); | |
4124 | iwe.u.data.length = strlen(buf); | |
4125 | current_ev = iwe_stream_add_point(info, current_ev, | |
4126 | end_buf, &iwe, buf); | |
f0706e82 JB |
4127 | kfree(buf); |
4128 | } | |
4129 | } | |
4130 | ||
902acc78 | 4131 | if (bss_mesh_cfg(bss)) { |
f709fc69 | 4132 | char *buf; |
24736701 | 4133 | u8 *cfg = bss_mesh_cfg(bss); |
4f5d4c4d | 4134 | buf = kmalloc(50, GFP_ATOMIC); |
f709fc69 LCC |
4135 | if (buf) { |
4136 | memset(&iwe, 0, sizeof(iwe)); | |
4137 | iwe.cmd = IWEVCUSTOM; | |
24736701 | 4138 | sprintf(buf, "Mesh network (version %d)", cfg[0]); |
4f5d4c4d | 4139 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4140 | current_ev = iwe_stream_add_point(info, current_ev, |
4141 | end_buf, | |
4f5d4c4d LCC |
4142 | &iwe, buf); |
4143 | sprintf(buf, "Path Selection Protocol ID: " | |
24736701 JL |
4144 | "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
4145 | cfg[4]); | |
4f5d4c4d | 4146 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4147 | current_ev = iwe_stream_add_point(info, current_ev, |
4148 | end_buf, | |
4f5d4c4d LCC |
4149 | &iwe, buf); |
4150 | sprintf(buf, "Path Selection Metric ID: " | |
24736701 JL |
4151 | "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
4152 | cfg[8]); | |
4f5d4c4d | 4153 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4154 | current_ev = iwe_stream_add_point(info, current_ev, |
4155 | end_buf, | |
4f5d4c4d LCC |
4156 | &iwe, buf); |
4157 | sprintf(buf, "Congestion Control Mode ID: " | |
24736701 JL |
4158 | "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
4159 | cfg[11], cfg[12]); | |
4f5d4c4d | 4160 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4161 | current_ev = iwe_stream_add_point(info, current_ev, |
4162 | end_buf, | |
4f5d4c4d LCC |
4163 | &iwe, buf); |
4164 | sprintf(buf, "Channel Precedence: " | |
24736701 JL |
4165 | "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
4166 | cfg[15], cfg[16]); | |
f709fc69 | 4167 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4168 | current_ev = iwe_stream_add_point(info, current_ev, |
4169 | end_buf, | |
f709fc69 LCC |
4170 | &iwe, buf); |
4171 | kfree(buf); | |
4172 | } | |
4173 | } | |
4174 | ||
f0706e82 JB |
4175 | return current_ev; |
4176 | } | |
4177 | ||
4178 | ||
f698d856 | 4179 | int ieee80211_sta_scan_results(struct ieee80211_local *local, |
ccc58057 DM |
4180 | struct iw_request_info *info, |
4181 | char *buf, size_t len) | |
f0706e82 | 4182 | { |
f0706e82 JB |
4183 | char *current_ev = buf; |
4184 | char *end_buf = buf + len; | |
4185 | struct ieee80211_sta_bss *bss; | |
4186 | ||
4187 | spin_lock_bh(&local->sta_bss_lock); | |
4188 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
4189 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
4190 | spin_unlock_bh(&local->sta_bss_lock); | |
4191 | return -E2BIG; | |
4192 | } | |
f698d856 | 4193 | current_ev = ieee80211_sta_scan_result(local, info, bss, |
ccc58057 | 4194 | current_ev, end_buf); |
f0706e82 JB |
4195 | } |
4196 | spin_unlock_bh(&local->sta_bss_lock); | |
4197 | return current_ev - buf; | |
4198 | } | |
4199 | ||
4200 | ||
f698d856 | 4201 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
f0706e82 | 4202 | { |
f0706e82 | 4203 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
988c0f72 | 4204 | |
f0706e82 JB |
4205 | kfree(ifsta->extra_ie); |
4206 | if (len == 0) { | |
4207 | ifsta->extra_ie = NULL; | |
4208 | ifsta->extra_ie_len = 0; | |
4209 | return 0; | |
4210 | } | |
4211 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
4212 | if (!ifsta->extra_ie) { | |
4213 | ifsta->extra_ie_len = 0; | |
4214 | return -ENOMEM; | |
4215 | } | |
4216 | memcpy(ifsta->extra_ie, ie, len); | |
4217 | ifsta->extra_ie_len = len; | |
4218 | return 0; | |
4219 | } | |
4220 | ||
4221 | ||
f698d856 | 4222 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 4223 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 4224 | u8 *addr, u64 supp_rates) |
f0706e82 | 4225 | { |
f698d856 | 4226 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4227 | struct sta_info *sta; |
0795af57 | 4228 | DECLARE_MAC_BUF(mac); |
87291c02 | 4229 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
4230 | |
4231 | /* TODO: Could consider removing the least recently used entry and | |
4232 | * allow new one to be added. */ | |
4233 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
4234 | if (net_ratelimit()) { | |
4235 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
f698d856 | 4236 | "entry %s\n", sdata->dev->name, print_mac(mac, addr)); |
f0706e82 JB |
4237 | } |
4238 | return NULL; | |
4239 | } | |
4240 | ||
1e188637 | 4241 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
4242 | return NULL; |
4243 | ||
f4ea83dd | 4244 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 4245 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
f698d856 | 4246 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
f4ea83dd | 4247 | #endif |
f0706e82 | 4248 | |
73651ee6 JB |
4249 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
4250 | if (!sta) | |
f0706e82 JB |
4251 | return NULL; |
4252 | ||
07346f81 | 4253 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 4254 | |
8e1535d5 EG |
4255 | /* make sure mandatory rates are always added */ |
4256 | sta->supp_rates[band] = supp_rates | | |
4257 | ieee80211_sta_get_mandatory_rates(local, band); | |
f0706e82 JB |
4258 | |
4259 | rate_control_rate_init(sta, local); | |
4260 | ||
93e5deb1 | 4261 | if (sta_info_insert(sta)) |
73651ee6 | 4262 | return NULL; |
73651ee6 | 4263 | |
d0709a65 | 4264 | return sta; |
f0706e82 JB |
4265 | } |
4266 | ||
4267 | ||
f698d856 | 4268 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4269 | { |
f0706e82 JB |
4270 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4271 | ||
f4ea83dd | 4272 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 4273 | sdata->dev->name, reason); |
f0706e82 | 4274 | |
51fb61e7 JB |
4275 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
4276 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
4277 | return -EINVAL; |
4278 | ||
aa458d17 | 4279 | ieee80211_set_disassoc(sdata, ifsta, true, true, reason); |
f0706e82 JB |
4280 | return 0; |
4281 | } | |
4282 | ||
4283 | ||
f698d856 | 4284 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4285 | { |
f0706e82 JB |
4286 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4287 | ||
f4ea83dd | 4288 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 4289 | sdata->dev->name, reason); |
f0706e82 | 4290 | |
51fb61e7 | 4291 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
4292 | return -EINVAL; |
4293 | ||
d6f2da5b | 4294 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4295 | return -1; |
4296 | ||
aa458d17 | 4297 | ieee80211_set_disassoc(sdata, ifsta, false, true, reason); |
f0706e82 JB |
4298 | return 0; |
4299 | } | |
84363e6e MA |
4300 | |
4301 | void ieee80211_notify_mac(struct ieee80211_hw *hw, | |
4302 | enum ieee80211_notification_types notif_type) | |
4303 | { | |
4304 | struct ieee80211_local *local = hw_to_local(hw); | |
4305 | struct ieee80211_sub_if_data *sdata; | |
4306 | ||
4307 | switch (notif_type) { | |
4308 | case IEEE80211_NOTIFY_RE_ASSOC: | |
4309 | rcu_read_lock(); | |
4310 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
3e122be0 JB |
4311 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
4312 | continue; | |
84363e6e | 4313 | |
f698d856 | 4314 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
4315 | } |
4316 | rcu_read_unlock(); | |
4317 | break; | |
4318 | } | |
4319 | } | |
4320 | EXPORT_SYMBOL(ieee80211_notify_mac); |