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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 | |
f698d856 | 355 | static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
356 | struct ieee80211_if_sta *ifsta) |
357 | { | |
f0706e82 JB |
358 | union iwreq_data wrqu; |
359 | ||
f0706e82 | 360 | if (ifsta->assocreq_ies) { |
087d833e JM |
361 | memset(&wrqu, 0, sizeof(wrqu)); |
362 | wrqu.data.length = ifsta->assocreq_ies_len; | |
b171e19e | 363 | wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu, |
087d833e | 364 | ifsta->assocreq_ies); |
f0706e82 | 365 | } |
087d833e JM |
366 | if (ifsta->assocresp_ies) { |
367 | memset(&wrqu, 0, sizeof(wrqu)); | |
368 | wrqu.data.length = ifsta->assocresp_ies_len; | |
b171e19e | 369 | wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu, |
087d833e | 370 | ifsta->assocresp_ies); |
f0706e82 | 371 | } |
f0706e82 JB |
372 | } |
373 | ||
374 | ||
f698d856 | 375 | static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, |
d6f2da5b | 376 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 377 | bool assoc) |
f0706e82 | 378 | { |
471b3efd | 379 | struct ieee80211_local *local = sdata->local; |
38668c05 | 380 | struct ieee80211_conf *conf = &local_to_hw(local)->conf; |
f0706e82 | 381 | union iwreq_data wrqu; |
471b3efd | 382 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 383 | |
f0706e82 | 384 | if (assoc) { |
5628221c | 385 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
386 | |
387 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
388 | ||
51fb61e7 | 389 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 | 390 | return; |
5628221c | 391 | |
f698d856 | 392 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
38668c05 | 393 | conf->channel->center_freq, |
cffdd30d | 394 | ifsta->ssid, ifsta->ssid_len); |
5628221c | 395 | if (bss) { |
21c0cbe7 TW |
396 | /* set timing information */ |
397 | sdata->bss_conf.beacon_int = bss->beacon_int; | |
398 | sdata->bss_conf.timestamp = bss->timestamp; | |
98f7dfd8 | 399 | sdata->bss_conf.dtim_period = bss->dtim_period; |
21c0cbe7 | 400 | |
50c4afb9 | 401 | changed |= ieee80211_handle_bss_capability(sdata, bss); |
21c0cbe7 | 402 | |
3e122be0 | 403 | ieee80211_rx_bss_put(local, bss); |
5628221c DD |
404 | } |
405 | ||
38668c05 TW |
406 | if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
407 | changed |= BSS_CHANGED_HT; | |
408 | sdata->bss_conf.assoc_ht = 1; | |
409 | sdata->bss_conf.ht_conf = &conf->ht_conf; | |
410 | sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf; | |
411 | } | |
412 | ||
d6f2da5b | 413 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
414 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
415 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
f698d856 | 416 | ieee80211_sta_send_associnfo(sdata, ifsta); |
f0706e82 | 417 | } else { |
f698d856 JBG |
418 | netif_carrier_off(sdata->dev); |
419 | ieee80211_sta_tear_down_BA_sessions(sdata, ifsta->bssid); | |
d6f2da5b | 420 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
f698d856 | 421 | changed |= ieee80211_reset_erp_info(sdata); |
38668c05 TW |
422 | |
423 | sdata->bss_conf.assoc_ht = 0; | |
424 | sdata->bss_conf.ht_conf = NULL; | |
425 | sdata->bss_conf.ht_bss_conf = NULL; | |
426 | ||
f0706e82 JB |
427 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
428 | } | |
f0706e82 | 429 | ifsta->last_probe = jiffies; |
47f0c502 | 430 | ieee80211_led_assoc(local, assoc); |
471b3efd | 431 | |
b2205256 | 432 | sdata->bss_conf.assoc = assoc; |
471b3efd | 433 | ieee80211_bss_info_change_notify(sdata, changed); |
8db9369f GC |
434 | |
435 | if (assoc) | |
f698d856 | 436 | netif_carrier_on(sdata->dev); |
8db9369f | 437 | |
41a7be48 | 438 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
f698d856 | 439 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
f0706e82 JB |
440 | } |
441 | ||
f698d856 | 442 | static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
443 | struct ieee80211_if_sta *ifsta, int deauth) |
444 | { | |
9859b81e RR |
445 | if (deauth) { |
446 | ifsta->direct_probe_tries = 0; | |
f0706e82 | 447 | ifsta->auth_tries = 0; |
9859b81e | 448 | } |
6042a3e3 | 449 | ifsta->assoc_scan_tries = 0; |
f0706e82 | 450 | ifsta->assoc_tries = 0; |
f698d856 | 451 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
452 | } |
453 | ||
f698d856 | 454 | void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ee385855 | 455 | int encrypt) |
f0706e82 | 456 | { |
f0706e82 JB |
457 | skb->dev = sdata->local->mdev; |
458 | skb_set_mac_header(skb, 0); | |
459 | skb_set_network_header(skb, 0); | |
460 | skb_set_transport_header(skb, 0); | |
461 | ||
d0f09804 JB |
462 | skb->iif = sdata->dev->ifindex; |
463 | skb->do_not_encrypt = !encrypt; | |
f0706e82 JB |
464 | |
465 | dev_queue_xmit(skb); | |
466 | } | |
467 | ||
468 | ||
f698d856 | 469 | static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
470 | struct ieee80211_if_sta *ifsta, |
471 | int transaction, u8 *extra, size_t extra_len, | |
472 | int encrypt) | |
473 | { | |
f698d856 | 474 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
475 | struct sk_buff *skb; |
476 | struct ieee80211_mgmt *mgmt; | |
477 | ||
478 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
479 | sizeof(*mgmt) + 6 + extra_len); | |
480 | if (!skb) { | |
481 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
f698d856 | 482 | "frame\n", sdata->dev->name); |
f0706e82 JB |
483 | return; |
484 | } | |
485 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
486 | ||
487 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
488 | memset(mgmt, 0, 24 + 6); | |
e7827a70 HH |
489 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
490 | IEEE80211_STYPE_AUTH); | |
f0706e82 JB |
491 | if (encrypt) |
492 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
493 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 494 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
495 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
496 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
497 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
498 | ifsta->auth_transaction = transaction + 1; | |
499 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
500 | if (extra) | |
501 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
502 | ||
f698d856 | 503 | ieee80211_sta_tx(sdata, skb, encrypt); |
f0706e82 JB |
504 | } |
505 | ||
9859b81e RR |
506 | static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata, |
507 | struct ieee80211_if_sta *ifsta) | |
508 | { | |
509 | DECLARE_MAC_BUF(mac); | |
510 | ||
511 | ifsta->direct_probe_tries++; | |
512 | if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) { | |
513 | printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n", | |
514 | sdata->dev->name, print_mac(mac, ifsta->bssid)); | |
515 | ifsta->state = IEEE80211_STA_MLME_DISABLED; | |
516 | return; | |
517 | } | |
518 | ||
519 | printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n", | |
520 | sdata->dev->name, print_mac(mac, ifsta->bssid), | |
521 | ifsta->direct_probe_tries); | |
522 | ||
523 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
524 | ||
525 | set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request); | |
526 | ||
527 | /* Direct probe is sent to broadcast address as some APs | |
528 | * will not answer to direct packet in unassociated state. | |
529 | */ | |
530 | ieee80211_send_probe_req(sdata, NULL, | |
531 | ifsta->ssid, ifsta->ssid_len); | |
532 | ||
533 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
534 | } | |
535 | ||
f0706e82 | 536 | |
f698d856 | 537 | static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
538 | struct ieee80211_if_sta *ifsta) |
539 | { | |
0795af57 JP |
540 | DECLARE_MAC_BUF(mac); |
541 | ||
f0706e82 JB |
542 | ifsta->auth_tries++; |
543 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 544 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 545 | " timed out\n", |
f698d856 | 546 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 547 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
548 | return; |
549 | } | |
550 | ||
48c2fc59 | 551 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
0795af57 | 552 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
f698d856 | 553 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 554 | |
f698d856 | 555 | ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0); |
f0706e82 JB |
556 | |
557 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
558 | } | |
559 | ||
36d16ae7 HS |
560 | static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss, |
561 | struct ieee80211_supported_band *sband, | |
562 | u64 *rates) | |
563 | { | |
564 | int i, j, count; | |
565 | *rates = 0; | |
566 | count = 0; | |
567 | for (i = 0; i < bss->supp_rates_len; i++) { | |
568 | int rate = (bss->supp_rates[i] & 0x7F) * 5; | |
569 | ||
570 | for (j = 0; j < sband->n_bitrates; j++) | |
571 | if (sband->bitrates[j].bitrate == rate) { | |
572 | *rates |= BIT(j); | |
573 | count++; | |
574 | break; | |
575 | } | |
576 | } | |
577 | ||
578 | return count; | |
579 | } | |
f0706e82 | 580 | |
f698d856 | 581 | static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
582 | struct ieee80211_if_sta *ifsta) |
583 | { | |
f698d856 | 584 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
585 | struct sk_buff *skb; |
586 | struct ieee80211_mgmt *mgmt; | |
43ac2ca3 | 587 | u8 *pos, *ies, *ht_add_ie; |
36d16ae7 | 588 | int i, len, count, rates_len, supp_rates_len; |
f0706e82 JB |
589 | u16 capab; |
590 | struct ieee80211_sta_bss *bss; | |
591 | int wmm = 0; | |
8318d78a | 592 | struct ieee80211_supported_band *sband; |
36d16ae7 | 593 | u64 rates = 0; |
f0706e82 JB |
594 | |
595 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
596 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
597 | ifsta->ssid_len); | |
598 | if (!skb) { | |
599 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
f698d856 | 600 | "frame\n", sdata->dev->name); |
f0706e82 JB |
601 | return; |
602 | } | |
603 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
604 | ||
8318d78a JB |
605 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
606 | ||
f0706e82 | 607 | capab = ifsta->capab; |
8318d78a JB |
608 | |
609 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) { | |
610 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
611 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
612 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
613 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
f0706e82 | 614 | } |
8318d78a | 615 | |
f698d856 | 616 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 617 | local->hw.conf.channel->center_freq, |
cffdd30d | 618 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
619 | if (bss) { |
620 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
621 | capab |= WLAN_CAPABILITY_PRIVACY; | |
43ac2ca3 | 622 | if (bss->wmm_used) |
f0706e82 | 623 | wmm = 1; |
0d580a77 HS |
624 | |
625 | /* get all rates supported by the device and the AP as | |
626 | * some APs don't like getting a superset of their rates | |
627 | * in the association request (e.g. D-Link DAP 1353 in | |
628 | * b-only mode) */ | |
629 | rates_len = ieee80211_compatible_rates(bss, sband, &rates); | |
630 | ||
06ff47bc TW |
631 | if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && |
632 | (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)) | |
633 | capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; | |
634 | ||
3e122be0 | 635 | ieee80211_rx_bss_put(local, bss); |
0d580a77 HS |
636 | } else { |
637 | rates = ~0; | |
638 | rates_len = sband->n_bitrates; | |
f0706e82 JB |
639 | } |
640 | ||
641 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
642 | memset(mgmt, 0, 24); | |
643 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 644 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
645 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
646 | ||
d6f2da5b | 647 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 | 648 | skb_put(skb, 10); |
e7827a70 HH |
649 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
650 | IEEE80211_STYPE_REASSOC_REQ); | |
f0706e82 | 651 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
652 | mgmt->u.reassoc_req.listen_interval = |
653 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
654 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, |
655 | ETH_ALEN); | |
656 | } else { | |
657 | skb_put(skb, 4); | |
e7827a70 HH |
658 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
659 | IEEE80211_STYPE_ASSOC_REQ); | |
f0706e82 | 660 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); |
ea95bba4 TW |
661 | mgmt->u.reassoc_req.listen_interval = |
662 | cpu_to_le16(local->hw.conf.listen_interval); | |
f0706e82 JB |
663 | } |
664 | ||
665 | /* SSID */ | |
666 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
667 | *pos++ = WLAN_EID_SSID; | |
668 | *pos++ = ifsta->ssid_len; | |
669 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
670 | ||
0d580a77 | 671 | /* add all rates which were marked to be used above */ |
36d16ae7 HS |
672 | supp_rates_len = rates_len; |
673 | if (supp_rates_len > 8) | |
674 | supp_rates_len = 8; | |
675 | ||
8318d78a | 676 | len = sband->n_bitrates; |
36d16ae7 | 677 | pos = skb_put(skb, supp_rates_len + 2); |
f0706e82 | 678 | *pos++ = WLAN_EID_SUPP_RATES; |
36d16ae7 | 679 | *pos++ = supp_rates_len; |
f0706e82 | 680 | |
36d16ae7 HS |
681 | count = 0; |
682 | for (i = 0; i < sband->n_bitrates; i++) { | |
683 | if (BIT(i) & rates) { | |
8318d78a | 684 | int rate = sband->bitrates[i].bitrate; |
f0706e82 | 685 | *pos++ = (u8) (rate / 5); |
36d16ae7 HS |
686 | if (++count == 8) |
687 | break; | |
688 | } | |
689 | } | |
690 | ||
8ab65b03 | 691 | if (rates_len > count) { |
36d16ae7 HS |
692 | pos = skb_put(skb, rates_len - count + 2); |
693 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
694 | *pos++ = rates_len - count; | |
695 | ||
696 | for (i++; i < sband->n_bitrates; i++) { | |
697 | if (BIT(i) & rates) { | |
698 | int rate = sband->bitrates[i].bitrate; | |
699 | *pos++ = (u8) (rate / 5); | |
700 | } | |
f0706e82 JB |
701 | } |
702 | } | |
703 | ||
06ff47bc TW |
704 | if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) { |
705 | /* 1. power capabilities */ | |
706 | pos = skb_put(skb, 4); | |
707 | *pos++ = WLAN_EID_PWR_CAPABILITY; | |
708 | *pos++ = 2; | |
709 | *pos++ = 0; /* min tx power */ | |
710 | *pos++ = local->hw.conf.channel->max_power; /* max tx power */ | |
711 | ||
712 | /* 2. supported channels */ | |
713 | /* TODO: get this in reg domain format */ | |
714 | pos = skb_put(skb, 2 * sband->n_channels + 2); | |
715 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
716 | *pos++ = 2 * sband->n_channels; | |
717 | for (i = 0; i < sband->n_channels; i++) { | |
718 | *pos++ = ieee80211_frequency_to_channel( | |
719 | sband->channels[i].center_freq); | |
720 | *pos++ = 1; /* one channel in the subband*/ | |
721 | } | |
722 | } | |
723 | ||
f0706e82 JB |
724 | if (ifsta->extra_ie) { |
725 | pos = skb_put(skb, ifsta->extra_ie_len); | |
726 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
727 | } | |
728 | ||
d6f2da5b | 729 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
730 | pos = skb_put(skb, 9); |
731 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
732 | *pos++ = 7; /* len */ | |
733 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
734 | *pos++ = 0x50; | |
735 | *pos++ = 0xf2; | |
736 | *pos++ = 2; /* WME */ | |
737 | *pos++ = 0; /* WME info */ | |
738 | *pos++ = 1; /* WME ver */ | |
739 | *pos++ = 0; | |
740 | } | |
3434fbd3 | 741 | |
c7153508 | 742 | /* wmm support is a must to HT */ |
3434fbd3 | 743 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) && |
43ac2ca3 JM |
744 | sband->ht_info.ht_supported && |
745 | (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) { | |
9306102e | 746 | struct ieee80211_ht_addt_info *ht_add_info = |
43ac2ca3 | 747 | (struct ieee80211_ht_addt_info *)ht_add_ie; |
9306102e EG |
748 | u16 cap = sband->ht_info.cap; |
749 | __le16 tmp; | |
750 | u32 flags = local->hw.conf.channel->flags; | |
751 | ||
752 | switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) { | |
753 | case IEEE80211_HT_IE_CHA_SEC_ABOVE: | |
754 | if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) { | |
755 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
756 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
757 | } | |
758 | break; | |
759 | case IEEE80211_HT_IE_CHA_SEC_BELOW: | |
760 | if (flags & IEEE80211_CHAN_NO_FAT_BELOW) { | |
761 | cap &= ~IEEE80211_HT_CAP_SUP_WIDTH; | |
762 | cap &= ~IEEE80211_HT_CAP_SGI_40; | |
763 | } | |
764 | break; | |
765 | } | |
766 | ||
767 | tmp = cpu_to_le16(cap); | |
c7153508 RR |
768 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); |
769 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
770 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
771 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
772 | memcpy(pos, &tmp, sizeof(u16)); | |
773 | pos += sizeof(u16); | |
8318d78a JB |
774 | /* TODO: needs a define here for << 2 */ |
775 | *pos++ = sband->ht_info.ampdu_factor | | |
776 | (sband->ht_info.ampdu_density << 2); | |
777 | memcpy(pos, sband->ht_info.supp_mcs_set, 16); | |
c7153508 | 778 | } |
f0706e82 JB |
779 | |
780 | kfree(ifsta->assocreq_ies); | |
781 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 782 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
783 | if (ifsta->assocreq_ies) |
784 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
785 | ||
f698d856 | 786 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
787 | } |
788 | ||
789 | ||
f698d856 | 790 | static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
791 | struct ieee80211_if_sta *ifsta, u16 reason) |
792 | { | |
f698d856 | 793 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
794 | struct sk_buff *skb; |
795 | struct ieee80211_mgmt *mgmt; | |
796 | ||
797 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
798 | if (!skb) { | |
799 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
f698d856 | 800 | "frame\n", sdata->dev->name); |
f0706e82 JB |
801 | return; |
802 | } | |
803 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
804 | ||
805 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
806 | memset(mgmt, 0, 24); | |
807 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 808 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 809 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
810 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
811 | IEEE80211_STYPE_DEAUTH); | |
f0706e82 JB |
812 | skb_put(skb, 2); |
813 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
814 | ||
f698d856 | 815 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
816 | } |
817 | ||
818 | ||
f698d856 | 819 | static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
820 | struct ieee80211_if_sta *ifsta, u16 reason) |
821 | { | |
f698d856 | 822 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
823 | struct sk_buff *skb; |
824 | struct ieee80211_mgmt *mgmt; | |
825 | ||
826 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
827 | if (!skb) { | |
828 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
f698d856 | 829 | "frame\n", sdata->dev->name); |
f0706e82 JB |
830 | return; |
831 | } | |
832 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
833 | ||
834 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
835 | memset(mgmt, 0, 24); | |
836 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
f698d856 | 837 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 | 838 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
e7827a70 HH |
839 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
840 | IEEE80211_STYPE_DISASSOC); | |
f0706e82 JB |
841 | skb_put(skb, 2); |
842 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
843 | ||
f698d856 | 844 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
845 | } |
846 | ||
847 | ||
f698d856 | 848 | static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
849 | struct ieee80211_if_sta *ifsta) |
850 | { | |
f698d856 | 851 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 852 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
853 | int bss_privacy; |
854 | int wep_privacy; | |
855 | int privacy_invoked; | |
f0706e82 | 856 | |
5b98b1f7 | 857 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
858 | return 0; |
859 | ||
f698d856 | 860 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 861 | local->hw.conf.channel->center_freq, |
cffdd30d | 862 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 JB |
863 | if (!bss) |
864 | return 0; | |
865 | ||
5b98b1f7 | 866 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
f698d856 | 867 | wep_privacy = !!ieee80211_sta_wep_configured(sdata); |
5b98b1f7 | 868 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); |
f0706e82 | 869 | |
3e122be0 | 870 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 871 | |
5b98b1f7 JB |
872 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
873 | return 0; | |
874 | ||
875 | return 1; | |
f0706e82 JB |
876 | } |
877 | ||
878 | ||
f698d856 | 879 | static void ieee80211_associate(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
880 | struct ieee80211_if_sta *ifsta) |
881 | { | |
0795af57 JP |
882 | DECLARE_MAC_BUF(mac); |
883 | ||
f0706e82 JB |
884 | ifsta->assoc_tries++; |
885 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 886 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 887 | " timed out\n", |
f698d856 | 888 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
48c2fc59 | 889 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
890 | return; |
891 | } | |
892 | ||
48c2fc59 | 893 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; |
0795af57 | 894 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
f698d856 JBG |
895 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
896 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { | |
f0706e82 | 897 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " |
f698d856 | 898 | "mixed-cell disabled - abort association\n", sdata->dev->name); |
48c2fc59 | 899 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 JB |
900 | return; |
901 | } | |
902 | ||
f698d856 | 903 | ieee80211_send_assoc(sdata, ifsta); |
f0706e82 JB |
904 | |
905 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
906 | } | |
907 | ||
908 | ||
f698d856 | 909 | static void ieee80211_associated(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
910 | struct ieee80211_if_sta *ifsta) |
911 | { | |
f698d856 | 912 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
913 | struct sta_info *sta; |
914 | int disassoc; | |
0795af57 | 915 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
916 | |
917 | /* TODO: start monitoring current AP signal quality and number of | |
918 | * missed beacons. Scan other channels every now and then and search | |
919 | * for better APs. */ | |
920 | /* TODO: remove expired BSSes */ | |
921 | ||
48c2fc59 | 922 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATED; |
f0706e82 | 923 | |
d0709a65 JB |
924 | rcu_read_lock(); |
925 | ||
f0706e82 JB |
926 | sta = sta_info_get(local, ifsta->bssid); |
927 | if (!sta) { | |
0795af57 | 928 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
f698d856 | 929 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
930 | disassoc = 1; |
931 | } else { | |
932 | disassoc = 0; | |
933 | if (time_after(jiffies, | |
934 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 935 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 936 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 937 | "current AP %s - assume out of " |
f0706e82 | 938 | "range\n", |
f698d856 | 939 | sdata->dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 940 | disassoc = 1; |
d0709a65 | 941 | sta_info_unlink(&sta); |
d6f2da5b | 942 | } else |
f698d856 | 943 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
944 | local->scan_ssid, |
945 | local->scan_ssid_len); | |
d6f2da5b | 946 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 947 | } else { |
d6f2da5b | 948 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
949 | if (time_after(jiffies, ifsta->last_probe + |
950 | IEEE80211_PROBE_INTERVAL)) { | |
951 | ifsta->last_probe = jiffies; | |
f698d856 | 952 | ieee80211_send_probe_req(sdata, ifsta->bssid, |
f0706e82 JB |
953 | ifsta->ssid, |
954 | ifsta->ssid_len); | |
955 | } | |
956 | } | |
f0706e82 | 957 | } |
d0709a65 JB |
958 | |
959 | rcu_read_unlock(); | |
960 | ||
3b96766f | 961 | if (disassoc && sta) |
d0709a65 | 962 | sta_info_destroy(sta); |
d0709a65 | 963 | |
f0706e82 | 964 | if (disassoc) { |
48c2fc59 | 965 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f698d856 | 966 | ieee80211_set_associated(sdata, ifsta, 0); |
f0706e82 JB |
967 | } else { |
968 | mod_timer(&ifsta->timer, jiffies + | |
969 | IEEE80211_MONITORING_INTERVAL); | |
970 | } | |
971 | } | |
972 | ||
973 | ||
f698d856 | 974 | static void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst, |
f0706e82 JB |
975 | u8 *ssid, size_t ssid_len) |
976 | { | |
f698d856 | 977 | struct ieee80211_local *local = sdata->local; |
8318d78a | 978 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
979 | struct sk_buff *skb; |
980 | struct ieee80211_mgmt *mgmt; | |
981 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
982 | int i; | |
983 | ||
984 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
985 | if (!skb) { | |
986 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
f698d856 | 987 | "request\n", sdata->dev->name); |
f0706e82 JB |
988 | return; |
989 | } | |
990 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
991 | ||
992 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
993 | memset(mgmt, 0, 24); | |
e7827a70 HH |
994 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
995 | IEEE80211_STYPE_PROBE_REQ); | |
f698d856 | 996 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
f0706e82 JB |
997 | if (dst) { |
998 | memcpy(mgmt->da, dst, ETH_ALEN); | |
999 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
1000 | } else { | |
1001 | memset(mgmt->da, 0xff, ETH_ALEN); | |
1002 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
1003 | } | |
1004 | pos = skb_put(skb, 2 + ssid_len); | |
1005 | *pos++ = WLAN_EID_SSID; | |
1006 | *pos++ = ssid_len; | |
1007 | memcpy(pos, ssid, ssid_len); | |
1008 | ||
1009 | supp_rates = skb_put(skb, 2); | |
1010 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
1011 | supp_rates[1] = 0; | |
8318d78a JB |
1012 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
1013 | ||
1014 | for (i = 0; i < sband->n_bitrates; i++) { | |
1015 | struct ieee80211_rate *rate = &sband->bitrates[i]; | |
f0706e82 JB |
1016 | if (esupp_rates) { |
1017 | pos = skb_put(skb, 1); | |
1018 | esupp_rates[1]++; | |
1019 | } else if (supp_rates[1] == 8) { | |
1020 | esupp_rates = skb_put(skb, 3); | |
1021 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
1022 | esupp_rates[1] = 1; | |
1023 | pos = &esupp_rates[2]; | |
1024 | } else { | |
1025 | pos = skb_put(skb, 1); | |
1026 | supp_rates[1]++; | |
1027 | } | |
8318d78a | 1028 | *pos = rate->bitrate / 5; |
f0706e82 JB |
1029 | } |
1030 | ||
f698d856 | 1031 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
1032 | } |
1033 | ||
1034 | ||
f698d856 | 1035 | static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 1036 | { |
f0706e82 | 1037 | if (!sdata || !sdata->default_key || |
8f20fc24 | 1038 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
1039 | return 0; |
1040 | return 1; | |
1041 | } | |
1042 | ||
1043 | ||
f698d856 | 1044 | static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1045 | struct ieee80211_if_sta *ifsta) |
1046 | { | |
f698d856 | 1047 | printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name); |
d6f2da5b | 1048 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f698d856 | 1049 | ieee80211_associate(sdata, ifsta); |
f0706e82 JB |
1050 | } |
1051 | ||
1052 | ||
f698d856 | 1053 | static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1054 | struct ieee80211_if_sta *ifsta, |
1055 | struct ieee80211_mgmt *mgmt, | |
1056 | size_t len) | |
1057 | { | |
1058 | u8 *pos; | |
1059 | struct ieee802_11_elems elems; | |
1060 | ||
f0706e82 | 1061 | pos = mgmt->u.auth.variable; |
67a4cce4 | 1062 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f4ea83dd | 1063 | if (!elems.challenge) |
f0706e82 | 1064 | return; |
f698d856 | 1065 | ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2, |
f0706e82 JB |
1066 | elems.challenge_len + 2, 1); |
1067 | } | |
1068 | ||
f698d856 | 1069 | static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid, |
9f985b0e RR |
1070 | u8 dialog_token, u16 status, u16 policy, |
1071 | u16 buf_size, u16 timeout) | |
1072 | { | |
9f985b0e | 1073 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 1074 | struct ieee80211_local *local = sdata->local; |
9f985b0e RR |
1075 | struct sk_buff *skb; |
1076 | struct ieee80211_mgmt *mgmt; | |
1077 | u16 capab; | |
1078 | ||
3acea5b6 EK |
1079 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
1080 | ||
9f985b0e RR |
1081 | if (!skb) { |
1082 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
f698d856 | 1083 | "for addba resp frame\n", sdata->dev->name); |
9f985b0e RR |
1084 | return; |
1085 | } | |
1086 | ||
1087 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1088 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1089 | memset(mgmt, 0, 24); | |
1090 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1091 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1092 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1093 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
9f985b0e RR |
1094 | else |
1095 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1096 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1097 | IEEE80211_STYPE_ACTION); | |
9f985b0e RR |
1098 | |
1099 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1100 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1101 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1102 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1103 | ||
1104 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1105 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1106 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1107 | ||
1108 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1109 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1110 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1111 | ||
f698d856 | 1112 | ieee80211_sta_tx(sdata, skb, 0); |
9f985b0e RR |
1113 | |
1114 | return; | |
1115 | } | |
1116 | ||
f698d856 | 1117 | void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, |
eadc8d9e RR |
1118 | u16 tid, u8 dialog_token, u16 start_seq_num, |
1119 | u16 agg_size, u16 timeout) | |
1120 | { | |
f698d856 | 1121 | struct ieee80211_local *local = sdata->local; |
eadc8d9e RR |
1122 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1123 | struct sk_buff *skb; | |
1124 | struct ieee80211_mgmt *mgmt; | |
1125 | u16 capab; | |
1126 | ||
3acea5b6 | 1127 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
eadc8d9e RR |
1128 | |
1129 | if (!skb) { | |
1130 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1131 | "for addba request frame\n", sdata->dev->name); |
eadc8d9e RR |
1132 | return; |
1133 | } | |
1134 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1135 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1136 | memset(mgmt, 0, 24); | |
1137 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1138 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e | 1139 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1140 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
eadc8d9e RR |
1141 | else |
1142 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1143 | ||
e7827a70 HH |
1144 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1145 | IEEE80211_STYPE_ACTION); | |
eadc8d9e RR |
1146 | |
1147 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req)); | |
1148 | ||
1149 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1150 | mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ; | |
1151 | ||
1152 | mgmt->u.action.u.addba_req.dialog_token = dialog_token; | |
1153 | capab = (u16)(1 << 1); /* bit 1 aggregation policy */ | |
1154 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1155 | capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */ | |
1156 | ||
1157 | mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab); | |
1158 | ||
1159 | mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout); | |
1160 | mgmt->u.action.u.addba_req.start_seq_num = | |
1161 | cpu_to_le16(start_seq_num << 4); | |
1162 | ||
f698d856 | 1163 | ieee80211_sta_tx(sdata, skb, 0); |
eadc8d9e RR |
1164 | } |
1165 | ||
f698d856 | 1166 | static void ieee80211_sta_process_addba_request(struct ieee80211_local *local, |
9f985b0e RR |
1167 | struct ieee80211_mgmt *mgmt, |
1168 | size_t len) | |
1169 | { | |
07db2183 RR |
1170 | struct ieee80211_hw *hw = &local->hw; |
1171 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1172 | struct sta_info *sta; |
07db2183 RR |
1173 | struct tid_ampdu_rx *tid_agg_rx; |
1174 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1175 | u8 dialog_token; |
07db2183 RR |
1176 | int ret = -EOPNOTSUPP; |
1177 | DECLARE_MAC_BUF(mac); | |
9f985b0e | 1178 | |
d0709a65 JB |
1179 | rcu_read_lock(); |
1180 | ||
9f985b0e | 1181 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1182 | if (!sta) { |
1183 | rcu_read_unlock(); | |
9f985b0e | 1184 | return; |
d0709a65 | 1185 | } |
9f985b0e RR |
1186 | |
1187 | /* extract session parameters from addba request frame */ | |
1188 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1189 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1190 | start_seq_num = |
1191 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1192 | |
1193 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1194 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1195 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1196 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1197 | ||
9f985b0e RR |
1198 | status = WLAN_STATUS_REQUEST_DECLINED; |
1199 | ||
07db2183 RR |
1200 | /* sanity check for incoming parameters: |
1201 | * check if configuration can support the BA policy | |
1202 | * and if buffer size does not exceeds max value */ | |
1203 | if (((ba_policy != 1) | |
1204 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1205 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1206 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1207 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1208 | if (net_ratelimit()) | |
7b9d44cd | 1209 | printk(KERN_DEBUG "AddBA Req with bad params from " |
07db2183 RR |
1210 | "%s on tid %u. policy %d, buffer size %d\n", |
1211 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1212 | buf_size); | |
1213 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1214 | goto end_no_lock; | |
1215 | } | |
1216 | /* determine default buffer size */ | |
1217 | if (buf_size == 0) { | |
8318d78a JB |
1218 | struct ieee80211_supported_band *sband; |
1219 | ||
1220 | sband = local->hw.wiphy->bands[conf->channel->band]; | |
07db2183 | 1221 | buf_size = IEEE80211_MIN_AMPDU_BUF; |
8318d78a | 1222 | buf_size = buf_size << sband->ht_info.ampdu_factor; |
07db2183 RR |
1223 | } |
1224 | ||
07db2183 RR |
1225 | |
1226 | /* examine state machine */ | |
07346f81 | 1227 | spin_lock_bh(&sta->lock); |
07db2183 | 1228 | |
cee24a3e | 1229 | if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) { |
07db2183 RR |
1230 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1231 | if (net_ratelimit()) | |
7b9d44cd | 1232 | printk(KERN_DEBUG "unexpected AddBA Req from " |
07db2183 RR |
1233 | "%s on tid %u\n", |
1234 | print_mac(mac, mgmt->sa), tid); | |
1235 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1236 | goto end; | |
1237 | } | |
1238 | ||
cee24a3e RR |
1239 | /* prepare A-MPDU MLME for Rx aggregation */ |
1240 | sta->ampdu_mlme.tid_rx[tid] = | |
1241 | kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC); | |
1242 | if (!sta->ampdu_mlme.tid_rx[tid]) { | |
f4ea83dd | 1243 | #ifdef CONFIG_MAC80211_HT_DEBUG |
cee24a3e RR |
1244 | if (net_ratelimit()) |
1245 | printk(KERN_ERR "allocate rx mlme to tid %d failed\n", | |
1246 | tid); | |
f4ea83dd | 1247 | #endif |
cee24a3e RR |
1248 | goto end; |
1249 | } | |
1250 | /* rx timer */ | |
1251 | sta->ampdu_mlme.tid_rx[tid]->session_timer.function = | |
1252 | sta_rx_agg_session_timer_expired; | |
1253 | sta->ampdu_mlme.tid_rx[tid]->session_timer.data = | |
1254 | (unsigned long)&sta->timer_to_tid[tid]; | |
1255 | init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer); | |
1256 | ||
1257 | tid_agg_rx = sta->ampdu_mlme.tid_rx[tid]; | |
1258 | ||
07db2183 RR |
1259 | /* prepare reordering buffer */ |
1260 | tid_agg_rx->reorder_buf = | |
c97c23e3 | 1261 | kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC); |
03147dfc | 1262 | if (!tid_agg_rx->reorder_buf) { |
f4ea83dd | 1263 | #ifdef CONFIG_MAC80211_HT_DEBUG |
03147dfc JB |
1264 | if (net_ratelimit()) |
1265 | printk(KERN_ERR "can not allocate reordering buffer " | |
1266 | "to tid %d\n", tid); | |
f4ea83dd | 1267 | #endif |
cee24a3e | 1268 | kfree(sta->ampdu_mlme.tid_rx[tid]); |
07db2183 RR |
1269 | goto end; |
1270 | } | |
1271 | memset(tid_agg_rx->reorder_buf, 0, | |
c97c23e3 | 1272 | buf_size * sizeof(struct sk_buff *)); |
07db2183 RR |
1273 | |
1274 | if (local->ops->ampdu_action) | |
1275 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
0df3ef45 | 1276 | sta->addr, tid, &start_seq_num); |
07db2183 | 1277 | #ifdef CONFIG_MAC80211_HT_DEBUG |
513a1025 | 1278 | printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret); |
07db2183 RR |
1279 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
1280 | ||
1281 | if (ret) { | |
1282 | kfree(tid_agg_rx->reorder_buf); | |
cee24a3e RR |
1283 | kfree(tid_agg_rx); |
1284 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
07db2183 RR |
1285 | goto end; |
1286 | } | |
1287 | ||
1288 | /* change state and send addba resp */ | |
cee24a3e | 1289 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL; |
07db2183 RR |
1290 | tid_agg_rx->dialog_token = dialog_token; |
1291 | tid_agg_rx->ssn = start_seq_num; | |
1292 | tid_agg_rx->head_seq_num = start_seq_num; | |
1293 | tid_agg_rx->buf_size = buf_size; | |
1294 | tid_agg_rx->timeout = timeout; | |
1295 | tid_agg_rx->stored_mpdu_num = 0; | |
1296 | status = WLAN_STATUS_SUCCESS; | |
1297 | end: | |
07346f81 | 1298 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1299 | |
1300 | end_no_lock: | |
f698d856 | 1301 | ieee80211_send_addba_resp(sta->sdata, sta->addr, tid, |
d0709a65 JB |
1302 | dialog_token, status, 1, buf_size, timeout); |
1303 | rcu_read_unlock(); | |
9f985b0e | 1304 | } |
f0706e82 | 1305 | |
f698d856 | 1306 | static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local, |
eadc8d9e RR |
1307 | struct ieee80211_mgmt *mgmt, |
1308 | size_t len) | |
1309 | { | |
eadc8d9e RR |
1310 | struct ieee80211_hw *hw = &local->hw; |
1311 | struct sta_info *sta; | |
1312 | u16 capab; | |
1313 | u16 tid; | |
1314 | u8 *state; | |
1315 | ||
d0709a65 JB |
1316 | rcu_read_lock(); |
1317 | ||
eadc8d9e | 1318 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1319 | if (!sta) { |
1320 | rcu_read_unlock(); | |
eadc8d9e | 1321 | return; |
d0709a65 | 1322 | } |
eadc8d9e RR |
1323 | |
1324 | capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); | |
1325 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1326 | ||
cee24a3e | 1327 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1328 | |
07346f81 | 1329 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1330 | |
cee24a3e | 1331 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1332 | spin_unlock_bh(&sta->lock); |
cee24a3e RR |
1333 | goto addba_resp_exit; |
1334 | } | |
1335 | ||
eadc8d9e | 1336 | if (mgmt->u.action.u.addba_resp.dialog_token != |
cee24a3e | 1337 | sta->ampdu_mlme.tid_tx[tid]->dialog_token) { |
07346f81 | 1338 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1339 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1340 | printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid); | |
1341 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
cee24a3e | 1342 | goto addba_resp_exit; |
eadc8d9e RR |
1343 | } |
1344 | ||
cee24a3e | 1345 | del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer); |
eadc8d9e RR |
1346 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1347 | printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid); | |
1348 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1349 | if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) | |
1350 | == WLAN_STATUS_SUCCESS) { | |
eadc8d9e | 1351 | *state |= HT_ADDBA_RECEIVED_MSK; |
cee24a3e | 1352 | sta->ampdu_mlme.addba_req_num[tid] = 0; |
eadc8d9e | 1353 | |
f4ea83dd | 1354 | if (*state == HT_AGG_STATE_OPERATIONAL) |
eadc8d9e | 1355 | ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]); |
eadc8d9e | 1356 | |
07346f81 | 1357 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1358 | } else { |
cee24a3e | 1359 | sta->ampdu_mlme.addba_req_num[tid]++; |
eadc8d9e RR |
1360 | /* this will allow the state check in stop_BA_session */ |
1361 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1362 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1363 | ieee80211_stop_tx_ba_session(hw, sta->addr, tid, |
1364 | WLAN_BACK_INITIATOR); | |
1365 | } | |
cee24a3e RR |
1366 | |
1367 | addba_resp_exit: | |
d0709a65 | 1368 | rcu_read_unlock(); |
eadc8d9e RR |
1369 | } |
1370 | ||
f698d856 | 1371 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, |
eadc8d9e | 1372 | u16 initiator, u16 reason_code) |
07db2183 | 1373 | { |
f698d856 | 1374 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1375 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
1376 | struct sk_buff *skb; | |
1377 | struct ieee80211_mgmt *mgmt; | |
1378 | u16 params; | |
1379 | ||
3acea5b6 | 1380 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
07db2183 RR |
1381 | |
1382 | if (!skb) { | |
1383 | printk(KERN_ERR "%s: failed to allocate buffer " | |
f698d856 | 1384 | "for delba frame\n", sdata->dev->name); |
07db2183 RR |
1385 | return; |
1386 | } | |
1387 | ||
1388 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1389 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1390 | memset(mgmt, 0, 24); | |
1391 | memcpy(mgmt->da, da, ETH_ALEN); | |
f698d856 | 1392 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
51fb61e7 | 1393 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
f698d856 | 1394 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
07db2183 RR |
1395 | else |
1396 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
e7827a70 HH |
1397 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
1398 | IEEE80211_STYPE_ACTION); | |
07db2183 RR |
1399 | |
1400 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1401 | ||
1402 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1403 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1404 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1405 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1406 | ||
1407 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1408 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1409 | ||
f698d856 | 1410 | ieee80211_sta_tx(sdata, skb, 0); |
07db2183 RR |
1411 | } |
1412 | ||
f698d856 | 1413 | void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn) |
429a3805 | 1414 | { |
f698d856 | 1415 | struct ieee80211_local *local = sdata->local; |
429a3805 RR |
1416 | struct sk_buff *skb; |
1417 | struct ieee80211_bar *bar; | |
1418 | u16 bar_control = 0; | |
1419 | ||
1420 | skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom); | |
1421 | if (!skb) { | |
1422 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1423 | "bar frame\n", sdata->dev->name); |
429a3805 RR |
1424 | return; |
1425 | } | |
1426 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1427 | bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar)); | |
1428 | memset(bar, 0, sizeof(*bar)); | |
e7827a70 HH |
1429 | bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
1430 | IEEE80211_STYPE_BACK_REQ); | |
429a3805 | 1431 | memcpy(bar->ra, ra, ETH_ALEN); |
f698d856 | 1432 | memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN); |
429a3805 RR |
1433 | bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL; |
1434 | bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA; | |
1435 | bar_control |= (u16)(tid << 12); | |
1436 | bar->control = cpu_to_le16(bar_control); | |
1437 | bar->start_seq_num = cpu_to_le16(ssn); | |
1438 | ||
f698d856 | 1439 | ieee80211_sta_tx(sdata, skb, 0); |
429a3805 RR |
1440 | } |
1441 | ||
f698d856 | 1442 | void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, |
07db2183 RR |
1443 | u16 initiator, u16 reason) |
1444 | { | |
f698d856 | 1445 | struct ieee80211_local *local = sdata->local; |
07db2183 RR |
1446 | struct ieee80211_hw *hw = &local->hw; |
1447 | struct sta_info *sta; | |
b580781e | 1448 | int ret, i; |
513a1025 | 1449 | DECLARE_MAC_BUF(mac); |
07db2183 | 1450 | |
d0709a65 JB |
1451 | rcu_read_lock(); |
1452 | ||
07db2183 | 1453 | sta = sta_info_get(local, ra); |
d0709a65 JB |
1454 | if (!sta) { |
1455 | rcu_read_unlock(); | |
07db2183 | 1456 | return; |
d0709a65 | 1457 | } |
07db2183 RR |
1458 | |
1459 | /* check if TID is in operational state */ | |
07346f81 | 1460 | spin_lock_bh(&sta->lock); |
cee24a3e | 1461 | if (sta->ampdu_mlme.tid_state_rx[tid] |
07db2183 | 1462 | != HT_AGG_STATE_OPERATIONAL) { |
07346f81 | 1463 | spin_unlock_bh(&sta->lock); |
d0709a65 | 1464 | rcu_read_unlock(); |
07db2183 RR |
1465 | return; |
1466 | } | |
cee24a3e | 1467 | sta->ampdu_mlme.tid_state_rx[tid] = |
07db2183 RR |
1468 | HT_AGG_STATE_REQ_STOP_BA_MSK | |
1469 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
07346f81 | 1470 | spin_unlock_bh(&sta->lock); |
07db2183 RR |
1471 | |
1472 | /* stop HW Rx aggregation. ampdu_action existence | |
1473 | * already verified in session init so we add the BUG_ON */ | |
1474 | BUG_ON(!local->ops->ampdu_action); | |
1475 | ||
513a1025 RR |
1476 | #ifdef CONFIG_MAC80211_HT_DEBUG |
1477 | printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n", | |
1478 | print_mac(mac, ra), tid); | |
1479 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1480 | ||
07db2183 | 1481 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, |
0df3ef45 | 1482 | ra, tid, NULL); |
07db2183 RR |
1483 | if (ret) |
1484 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
f4ea83dd | 1485 | "aggregation for tid %d\n", tid); |
07db2183 RR |
1486 | |
1487 | /* shutdown timer has not expired */ | |
1488 | if (initiator != WLAN_BACK_TIMER) | |
cee24a3e | 1489 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer); |
07db2183 RR |
1490 | |
1491 | /* check if this is a self generated aggregation halt */ | |
1492 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
f698d856 | 1493 | ieee80211_send_delba(sdata, ra, tid, 0, reason); |
07db2183 RR |
1494 | |
1495 | /* free the reordering buffer */ | |
cee24a3e RR |
1496 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) { |
1497 | if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) { | |
b580781e | 1498 | /* release the reordered frames */ |
cee24a3e RR |
1499 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]); |
1500 | sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--; | |
1501 | sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL; | |
b580781e RR |
1502 | } |
1503 | } | |
cee24a3e RR |
1504 | /* free resources */ |
1505 | kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf); | |
1506 | kfree(sta->ampdu_mlme.tid_rx[tid]); | |
1507 | sta->ampdu_mlme.tid_rx[tid] = NULL; | |
1508 | sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE; | |
07db2183 | 1509 | |
d0709a65 | 1510 | rcu_read_unlock(); |
07db2183 RR |
1511 | } |
1512 | ||
eadc8d9e | 1513 | |
f698d856 | 1514 | static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata, |
688b88a4 RR |
1515 | struct ieee80211_mgmt *mgmt, size_t len) |
1516 | { | |
f698d856 | 1517 | struct ieee80211_local *local = sdata->local; |
688b88a4 RR |
1518 | struct sta_info *sta; |
1519 | u16 tid, params; | |
1520 | u16 initiator; | |
1521 | DECLARE_MAC_BUF(mac); | |
1522 | ||
d0709a65 JB |
1523 | rcu_read_lock(); |
1524 | ||
688b88a4 | 1525 | sta = sta_info_get(local, mgmt->sa); |
d0709a65 JB |
1526 | if (!sta) { |
1527 | rcu_read_unlock(); | |
688b88a4 | 1528 | return; |
d0709a65 | 1529 | } |
688b88a4 RR |
1530 | |
1531 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1532 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1533 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1534 | ||
1535 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1536 | if (net_ratelimit()) | |
d92684e6 RR |
1537 | printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n", |
1538 | print_mac(mac, mgmt->sa), | |
2e354ed7 | 1539 | initiator ? "initiator" : "recipient", tid, |
688b88a4 RR |
1540 | mgmt->u.action.u.delba.reason_code); |
1541 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1542 | ||
1543 | if (initiator == WLAN_BACK_INITIATOR) | |
f698d856 | 1544 | ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid, |
688b88a4 | 1545 | WLAN_BACK_INITIATOR, 0); |
d92684e6 | 1546 | else { /* WLAN_BACK_RECIPIENT */ |
07346f81 | 1547 | spin_lock_bh(&sta->lock); |
cee24a3e | 1548 | sta->ampdu_mlme.tid_state_tx[tid] = |
d92684e6 | 1549 | HT_AGG_STATE_OPERATIONAL; |
07346f81 | 1550 | spin_unlock_bh(&sta->lock); |
d92684e6 RR |
1551 | ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid, |
1552 | WLAN_BACK_RECIPIENT); | |
1553 | } | |
d0709a65 | 1554 | rcu_read_unlock(); |
688b88a4 RR |
1555 | } |
1556 | ||
eadc8d9e RR |
1557 | /* |
1558 | * After sending add Block Ack request we activated a timer until | |
1559 | * add Block Ack response will arrive from the recipient. | |
1560 | * If this timer expires sta_addba_resp_timer_expired will be executed. | |
1561 | */ | |
1562 | void sta_addba_resp_timer_expired(unsigned long data) | |
1563 | { | |
1564 | /* not an elegant detour, but there is no choice as the timer passes | |
1565 | * only one argument, and both sta_info and TID are needed, so init | |
73651ee6 | 1566 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
eadc8d9e | 1567 | * array gives the sta through container_of */ |
70d251b2 | 1568 | u16 tid = *(u8 *)data; |
eadc8d9e RR |
1569 | struct sta_info *temp_sta = container_of((void *)data, |
1570 | struct sta_info, timer_to_tid[tid]); | |
1571 | ||
1572 | struct ieee80211_local *local = temp_sta->local; | |
1573 | struct ieee80211_hw *hw = &local->hw; | |
1574 | struct sta_info *sta; | |
1575 | u8 *state; | |
1576 | ||
d0709a65 JB |
1577 | rcu_read_lock(); |
1578 | ||
eadc8d9e | 1579 | sta = sta_info_get(local, temp_sta->addr); |
d0709a65 JB |
1580 | if (!sta) { |
1581 | rcu_read_unlock(); | |
eadc8d9e | 1582 | return; |
d0709a65 | 1583 | } |
eadc8d9e | 1584 | |
cee24a3e | 1585 | state = &sta->ampdu_mlme.tid_state_tx[tid]; |
eadc8d9e | 1586 | /* check if the TID waits for addBA response */ |
07346f81 | 1587 | spin_lock_bh(&sta->lock); |
eadc8d9e | 1588 | if (!(*state & HT_ADDBA_REQUESTED_MSK)) { |
07346f81 | 1589 | spin_unlock_bh(&sta->lock); |
eadc8d9e | 1590 | *state = HT_AGG_STATE_IDLE; |
f4ea83dd | 1591 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e RR |
1592 | printk(KERN_DEBUG "timer expired on tid %d but we are not " |
1593 | "expecting addBA response there", tid); | |
f4ea83dd | 1594 | #endif |
eadc8d9e RR |
1595 | goto timer_expired_exit; |
1596 | } | |
1597 | ||
f4ea83dd | 1598 | #ifdef CONFIG_MAC80211_HT_DEBUG |
eadc8d9e | 1599 | printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid); |
f4ea83dd | 1600 | #endif |
eadc8d9e RR |
1601 | |
1602 | /* go through the state check in stop_BA_session */ | |
1603 | *state = HT_AGG_STATE_OPERATIONAL; | |
07346f81 | 1604 | spin_unlock_bh(&sta->lock); |
eadc8d9e RR |
1605 | ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid, |
1606 | WLAN_BACK_INITIATOR); | |
1607 | ||
1608 | timer_expired_exit: | |
d0709a65 | 1609 | rcu_read_unlock(); |
eadc8d9e RR |
1610 | } |
1611 | ||
07db2183 | 1612 | /* |
7b9d44cd RR |
1613 | * After accepting the AddBA Request we activated a timer, |
1614 | * resetting it after each frame that arrives from the originator. | |
07db2183 RR |
1615 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. |
1616 | */ | |
712590de | 1617 | static void sta_rx_agg_session_timer_expired(unsigned long data) |
07db2183 RR |
1618 | { |
1619 | /* not an elegant detour, but there is no choice as the timer passes | |
70d251b2 | 1620 | * only one argument, and various sta_info are needed here, so init |
73651ee6 | 1621 | * flow in sta_info_create gives the TID as data, while the timer_to_id |
07db2183 RR |
1622 | * array gives the sta through container_of */ |
1623 | u8 *ptid = (u8 *)data; | |
1624 | u8 *timer_to_id = ptid - *ptid; | |
1625 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1626 | timer_to_tid[0]); | |
1627 | ||
f4ea83dd | 1628 | #ifdef CONFIG_MAC80211_HT_DEBUG |
07db2183 | 1629 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); |
f4ea83dd | 1630 | #endif |
f698d856 | 1631 | ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr, |
d0709a65 | 1632 | (u16)*ptid, WLAN_BACK_TIMER, |
07db2183 RR |
1633 | WLAN_REASON_QSTA_TIMEOUT); |
1634 | } | |
1635 | ||
f698d856 | 1636 | void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr) |
85249e5f | 1637 | { |
f698d856 | 1638 | struct ieee80211_local *local = sdata->local; |
85249e5f RR |
1639 | int i; |
1640 | ||
1641 | for (i = 0; i < STA_TID_NUM; i++) { | |
1642 | ieee80211_stop_tx_ba_session(&local->hw, addr, i, | |
1643 | WLAN_BACK_INITIATOR); | |
f698d856 | 1644 | ieee80211_sta_stop_rx_ba_session(sdata, addr, i, |
85249e5f RR |
1645 | WLAN_BACK_RECIPIENT, |
1646 | WLAN_REASON_QSTA_LEAVE_QBSS); | |
1647 | } | |
1648 | } | |
07db2183 | 1649 | |
f698d856 | 1650 | static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1651 | struct ieee80211_msrment_ie *request_ie, |
1652 | const u8 *da, const u8 *bssid, | |
1653 | u8 dialog_token) | |
1654 | { | |
f698d856 | 1655 | struct ieee80211_local *local = sdata->local; |
b6623486 AK |
1656 | struct sk_buff *skb; |
1657 | struct ieee80211_mgmt *msr_report; | |
1658 | ||
1659 | skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom + | |
1660 | sizeof(struct ieee80211_msrment_ie)); | |
1661 | ||
1662 | if (!skb) { | |
1663 | printk(KERN_ERR "%s: failed to allocate buffer for " | |
f698d856 | 1664 | "measurement report frame\n", sdata->dev->name); |
b6623486 AK |
1665 | return; |
1666 | } | |
1667 | ||
1668 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1669 | msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24); | |
1670 | memset(msr_report, 0, 24); | |
1671 | memcpy(msr_report->da, da, ETH_ALEN); | |
f698d856 | 1672 | memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN); |
b6623486 | 1673 | memcpy(msr_report->bssid, bssid, ETH_ALEN); |
e7827a70 | 1674 | msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
b6623486 AK |
1675 | IEEE80211_STYPE_ACTION); |
1676 | ||
1677 | skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement)); | |
1678 | msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; | |
1679 | msr_report->u.action.u.measurement.action_code = | |
1680 | WLAN_ACTION_SPCT_MSR_RPRT; | |
1681 | msr_report->u.action.u.measurement.dialog_token = dialog_token; | |
1682 | ||
1683 | msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT; | |
1684 | msr_report->u.action.u.measurement.length = | |
1685 | sizeof(struct ieee80211_msrment_ie); | |
1686 | ||
1687 | memset(&msr_report->u.action.u.measurement.msr_elem, 0, | |
1688 | sizeof(struct ieee80211_msrment_ie)); | |
1689 | msr_report->u.action.u.measurement.msr_elem.token = request_ie->token; | |
1690 | msr_report->u.action.u.measurement.msr_elem.mode |= | |
1691 | IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED; | |
1692 | msr_report->u.action.u.measurement.msr_elem.type = request_ie->type; | |
1693 | ||
f698d856 | 1694 | ieee80211_sta_tx(sdata, skb, 0); |
b6623486 AK |
1695 | } |
1696 | ||
f698d856 | 1697 | static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, |
b6623486 AK |
1698 | struct ieee80211_mgmt *mgmt, |
1699 | size_t len) | |
1700 | { | |
1701 | /* | |
1702 | * Ignoring measurement request is spec violation. | |
1703 | * Mandatory measurements must be reported optional | |
1704 | * measurements might be refused or reported incapable | |
1705 | * For now just refuse | |
1706 | * TODO: Answer basic measurement as unmeasured | |
1707 | */ | |
f698d856 | 1708 | ieee80211_send_refuse_measurement_request(sdata, |
b6623486 AK |
1709 | &mgmt->u.action.u.measurement.msr_elem, |
1710 | mgmt->sa, mgmt->bssid, | |
1711 | mgmt->u.action.u.measurement.dialog_token); | |
1712 | } | |
1713 | ||
1714 | ||
f698d856 | 1715 | static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1716 | struct ieee80211_if_sta *ifsta, |
1717 | struct ieee80211_mgmt *mgmt, | |
1718 | size_t len) | |
1719 | { | |
f0706e82 | 1720 | u16 auth_alg, auth_transaction, status_code; |
0795af57 | 1721 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1722 | |
48c2fc59 | 1723 | if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && |
f4ea83dd | 1724 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) |
f0706e82 | 1725 | return; |
f0706e82 | 1726 | |
f4ea83dd | 1727 | if (len < 24 + 6) |
f0706e82 | 1728 | return; |
f0706e82 | 1729 | |
51fb61e7 | 1730 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1731 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1732 | return; |
f0706e82 | 1733 | |
51fb61e7 | 1734 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f4ea83dd | 1735 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
f0706e82 | 1736 | return; |
f0706e82 JB |
1737 | |
1738 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1739 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1740 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1741 | ||
51fb61e7 | 1742 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
135a2110 JB |
1743 | /* |
1744 | * IEEE 802.11 standard does not require authentication in IBSS | |
f0706e82 JB |
1745 | * networks and most implementations do not seem to use it. |
1746 | * However, try to reply to authentication attempts if someone | |
1747 | * has actually implemented this. | |
135a2110 | 1748 | */ |
f4ea83dd | 1749 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
f0706e82 | 1750 | return; |
f698d856 | 1751 | ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0); |
f0706e82 JB |
1752 | } |
1753 | ||
1754 | if (auth_alg != ifsta->auth_alg || | |
f4ea83dd | 1755 | auth_transaction != ifsta->auth_transaction) |
f0706e82 | 1756 | return; |
f0706e82 JB |
1757 | |
1758 | if (status_code != WLAN_STATUS_SUCCESS) { | |
f0706e82 JB |
1759 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { |
1760 | u8 algs[3]; | |
1761 | const int num_algs = ARRAY_SIZE(algs); | |
1762 | int i, pos; | |
1763 | algs[0] = algs[1] = algs[2] = 0xff; | |
1764 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1765 | algs[0] = WLAN_AUTH_OPEN; | |
1766 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1767 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1768 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1769 | algs[2] = WLAN_AUTH_LEAP; | |
1770 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1771 | pos = 0; | |
1772 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1773 | pos = 1; | |
1774 | else | |
1775 | pos = 2; | |
1776 | for (i = 0; i < num_algs; i++) { | |
1777 | pos++; | |
1778 | if (pos >= num_algs) | |
1779 | pos = 0; | |
1780 | if (algs[pos] == ifsta->auth_alg || | |
1781 | algs[pos] == 0xff) | |
1782 | continue; | |
1783 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
f698d856 | 1784 | !ieee80211_sta_wep_configured(sdata)) |
f0706e82 JB |
1785 | continue; |
1786 | ifsta->auth_alg = algs[pos]; | |
f0706e82 JB |
1787 | break; |
1788 | } | |
1789 | } | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | switch (ifsta->auth_alg) { | |
1794 | case WLAN_AUTH_OPEN: | |
1795 | case WLAN_AUTH_LEAP: | |
f698d856 | 1796 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 JB |
1797 | break; |
1798 | case WLAN_AUTH_SHARED_KEY: | |
1799 | if (ifsta->auth_transaction == 4) | |
f698d856 | 1800 | ieee80211_auth_completed(sdata, ifsta); |
f0706e82 | 1801 | else |
f698d856 | 1802 | ieee80211_auth_challenge(sdata, ifsta, mgmt, len); |
f0706e82 JB |
1803 | break; |
1804 | } | |
1805 | } | |
1806 | ||
1807 | ||
f698d856 | 1808 | static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1809 | struct ieee80211_if_sta *ifsta, |
1810 | struct ieee80211_mgmt *mgmt, | |
1811 | size_t len) | |
1812 | { | |
1813 | u16 reason_code; | |
0795af57 | 1814 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1815 | |
f4ea83dd | 1816 | if (len < 24 + 2) |
f0706e82 | 1817 | return; |
f0706e82 | 1818 | |
f4ea83dd | 1819 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1820 | return; |
f0706e82 JB |
1821 | |
1822 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1823 | ||
988c0f72 | 1824 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) |
f698d856 | 1825 | printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name); |
f0706e82 | 1826 | |
48c2fc59 TW |
1827 | if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE || |
1828 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATE || | |
1829 | ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { | |
9859b81e | 1830 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; |
f0706e82 JB |
1831 | mod_timer(&ifsta->timer, jiffies + |
1832 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1833 | } | |
1834 | ||
f698d856 | 1835 | ieee80211_set_disassoc(sdata, ifsta, 1); |
d6f2da5b | 1836 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1837 | } |
1838 | ||
1839 | ||
f698d856 | 1840 | static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1841 | struct ieee80211_if_sta *ifsta, |
1842 | struct ieee80211_mgmt *mgmt, | |
1843 | size_t len) | |
1844 | { | |
1845 | u16 reason_code; | |
0795af57 | 1846 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1847 | |
f4ea83dd | 1848 | if (len < 24 + 2) |
f0706e82 | 1849 | return; |
f0706e82 | 1850 | |
f4ea83dd | 1851 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN)) |
f0706e82 | 1852 | return; |
f0706e82 JB |
1853 | |
1854 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1855 | ||
d6f2da5b | 1856 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f698d856 | 1857 | printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name); |
f0706e82 | 1858 | |
48c2fc59 TW |
1859 | if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) { |
1860 | ifsta->state = IEEE80211_STA_MLME_ASSOCIATE; | |
f0706e82 JB |
1861 | mod_timer(&ifsta->timer, jiffies + |
1862 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1863 | } | |
1864 | ||
f698d856 | 1865 | ieee80211_set_disassoc(sdata, ifsta, 0); |
f0706e82 JB |
1866 | } |
1867 | ||
1868 | ||
471b3efd | 1869 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1870 | struct ieee80211_if_sta *ifsta, |
1871 | struct ieee80211_mgmt *mgmt, | |
1872 | size_t len, | |
1873 | int reassoc) | |
1874 | { | |
471b3efd | 1875 | struct ieee80211_local *local = sdata->local; |
8318d78a | 1876 | struct ieee80211_supported_band *sband; |
f0706e82 | 1877 | struct sta_info *sta; |
8318d78a | 1878 | u64 rates, basic_rates; |
f0706e82 JB |
1879 | u16 capab_info, status_code, aid; |
1880 | struct ieee802_11_elems elems; | |
471b3efd | 1881 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
1882 | u8 *pos; |
1883 | int i, j; | |
0795af57 | 1884 | DECLARE_MAC_BUF(mac); |
8318d78a | 1885 | bool have_higher_than_11mbit = false; |
f0706e82 JB |
1886 | |
1887 | /* AssocResp and ReassocResp have identical structure, so process both | |
1888 | * of them in this function. */ | |
1889 | ||
48c2fc59 | 1890 | if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE) |
f0706e82 | 1891 | return; |
f0706e82 | 1892 | |
f4ea83dd | 1893 | if (len < 24 + 6) |
f0706e82 | 1894 | return; |
f0706e82 | 1895 | |
f4ea83dd | 1896 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) |
f0706e82 | 1897 | return; |
f0706e82 JB |
1898 | |
1899 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1900 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1901 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1902 | |
0795af57 | 1903 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1904 | "status=%d aid=%d)\n", |
f698d856 | 1905 | sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1906 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1907 | |
1908 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1909 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
f698d856 | 1910 | sdata->dev->name, status_code); |
8a69aa93 DD |
1911 | /* if this was a reassociation, ensure we try a "full" |
1912 | * association next time. This works around some broken APs | |
1913 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1914 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1915 | return; |
1916 | } | |
1917 | ||
1dd84aa2 JB |
1918 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1919 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
f698d856 | 1920 | "set\n", sdata->dev->name, aid); |
1dd84aa2 JB |
1921 | aid &= ~(BIT(15) | BIT(14)); |
1922 | ||
f0706e82 | 1923 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1924 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1925 | |
1926 | if (!elems.supp_rates) { | |
1927 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
f698d856 | 1928 | sdata->dev->name); |
f0706e82 JB |
1929 | return; |
1930 | } | |
1931 | ||
f698d856 | 1932 | printk(KERN_DEBUG "%s: associated\n", sdata->dev->name); |
f0706e82 JB |
1933 | ifsta->aid = aid; |
1934 | ifsta->ap_capab = capab_info; | |
1935 | ||
1936 | kfree(ifsta->assocresp_ies); | |
1937 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1938 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1939 | if (ifsta->assocresp_ies) |
1940 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1941 | ||
d0709a65 JB |
1942 | rcu_read_lock(); |
1943 | ||
f0706e82 JB |
1944 | /* Add STA entry for the AP */ |
1945 | sta = sta_info_get(local, ifsta->bssid); | |
1946 | if (!sta) { | |
1947 | struct ieee80211_sta_bss *bss; | |
73651ee6 | 1948 | int err; |
d0709a65 | 1949 | |
73651ee6 JB |
1950 | sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC); |
1951 | if (!sta) { | |
1952 | printk(KERN_DEBUG "%s: failed to alloc STA entry for" | |
f698d856 | 1953 | " the AP\n", sdata->dev->name); |
d0709a65 | 1954 | rcu_read_unlock(); |
f0706e82 JB |
1955 | return; |
1956 | } | |
f698d856 | 1957 | bss = ieee80211_rx_bss_get(local, ifsta->bssid, |
8318d78a | 1958 | local->hw.conf.channel->center_freq, |
cffdd30d | 1959 | ifsta->ssid, ifsta->ssid_len); |
f0706e82 | 1960 | if (bss) { |
f0706e82 | 1961 | sta->last_signal = bss->signal; |
566bfe5a | 1962 | sta->last_qual = bss->qual; |
f0706e82 | 1963 | sta->last_noise = bss->noise; |
3e122be0 | 1964 | ieee80211_rx_bss_put(local, bss); |
f0706e82 | 1965 | } |
73651ee6 JB |
1966 | |
1967 | err = sta_info_insert(sta); | |
1968 | if (err) { | |
1969 | printk(KERN_DEBUG "%s: failed to insert STA entry for" | |
f698d856 | 1970 | " the AP (error %d)\n", sdata->dev->name, err); |
73651ee6 JB |
1971 | rcu_read_unlock(); |
1972 | return; | |
1973 | } | |
a61dae1f RR |
1974 | /* update new sta with its last rx activity */ |
1975 | sta->last_rx = jiffies; | |
f0706e82 JB |
1976 | } |
1977 | ||
73651ee6 JB |
1978 | /* |
1979 | * FIXME: Do we really need to update the sta_info's information here? | |
1980 | * We already know about the AP (we found it in our list) so it | |
1981 | * should already be filled with the right info, no? | |
1982 | * As is stands, all this is racy because typically we assume | |
1983 | * the information that is filled in here (except flags) doesn't | |
1984 | * change while a STA structure is alive. As such, it should move | |
1985 | * to between the sta_info_alloc() and sta_info_insert() above. | |
1986 | */ | |
1987 | ||
07346f81 JB |
1988 | set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP | |
1989 | WLAN_STA_AUTHORIZED); | |
f0706e82 JB |
1990 | |
1991 | rates = 0; | |
8318d78a JB |
1992 | basic_rates = 0; |
1993 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
1994 | ||
f0706e82 JB |
1995 | for (i = 0; i < elems.supp_rates_len; i++) { |
1996 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
1997 | |
1998 | if (rate > 110) | |
1999 | have_higher_than_11mbit = true; | |
2000 | ||
2001 | for (j = 0; j < sband->n_bitrates; j++) { | |
2002 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2003 | rates |= BIT(j); |
8318d78a JB |
2004 | if (elems.supp_rates[i] & 0x80) |
2005 | basic_rates |= BIT(j); | |
2006 | } | |
f0706e82 | 2007 | } |
8318d78a | 2008 | |
f0706e82 JB |
2009 | for (i = 0; i < elems.ext_supp_rates_len; i++) { |
2010 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
8318d78a JB |
2011 | |
2012 | if (rate > 110) | |
2013 | have_higher_than_11mbit = true; | |
2014 | ||
2015 | for (j = 0; j < sband->n_bitrates; j++) { | |
2016 | if (sband->bitrates[j].bitrate == rate) | |
f0706e82 | 2017 | rates |= BIT(j); |
8318d78a JB |
2018 | if (elems.ext_supp_rates[i] & 0x80) |
2019 | basic_rates |= BIT(j); | |
2020 | } | |
f0706e82 | 2021 | } |
8318d78a JB |
2022 | |
2023 | sta->supp_rates[local->hw.conf.channel->band] = rates; | |
2024 | sdata->basic_rates = basic_rates; | |
2025 | ||
2026 | /* cf. IEEE 802.11 9.2.12 */ | |
2027 | if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ && | |
2028 | have_higher_than_11mbit) | |
2029 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; | |
2030 | else | |
2031 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; | |
f0706e82 | 2032 | |
3434fbd3 JB |
2033 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
2034 | (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { | |
d3c990fb | 2035 | struct ieee80211_ht_bss_info bss_info; |
d3c990fb RR |
2036 | ieee80211_ht_cap_ie_to_ht_info( |
2037 | (struct ieee80211_ht_cap *) | |
2038 | elems.ht_cap_elem, &sta->ht_info); | |
2039 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2040 | (struct ieee80211_ht_addt_info *) | |
2041 | elems.ht_info_elem, &bss_info); | |
38668c05 | 2042 | ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info); |
d3c990fb RR |
2043 | } |
2044 | ||
f0706e82 JB |
2045 | rate_control_rate_init(sta, local); |
2046 | ||
3434fbd3 | 2047 | if (elems.wmm_param) { |
07346f81 | 2048 | set_sta_flags(sta, WLAN_STA_WME); |
e5f98f2d | 2049 | rcu_read_unlock(); |
f698d856 | 2050 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
f0706e82 | 2051 | elems.wmm_param_len); |
e5f98f2d JB |
2052 | } else |
2053 | rcu_read_unlock(); | |
f0706e82 | 2054 | |
21c0cbe7 TW |
2055 | /* set AID and assoc capability, |
2056 | * ieee80211_set_associated() will tell the driver */ | |
8318d78a | 2057 | bss_conf->aid = aid; |
21c0cbe7 | 2058 | bss_conf->assoc_capability = capab_info; |
f698d856 | 2059 | ieee80211_set_associated(sdata, ifsta, 1); |
f0706e82 | 2060 | |
f698d856 | 2061 | ieee80211_associated(sdata, ifsta); |
f0706e82 JB |
2062 | } |
2063 | ||
2064 | ||
2065 | /* Caller must hold local->sta_bss_lock */ | |
f698d856 | 2066 | static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local, |
f0706e82 JB |
2067 | struct ieee80211_sta_bss *bss) |
2068 | { | |
f709fc69 | 2069 | u8 hash_idx; |
902acc78 JB |
2070 | |
2071 | if (bss_mesh_cfg(bss)) | |
2072 | hash_idx = mesh_id_hash(bss_mesh_id(bss), | |
2073 | bss_mesh_id_len(bss)); | |
f709fc69 | 2074 | else |
f709fc69 | 2075 | hash_idx = STA_HASH(bss->bssid); |
902acc78 | 2076 | |
f709fc69 LCC |
2077 | bss->hnext = local->sta_bss_hash[hash_idx]; |
2078 | local->sta_bss_hash[hash_idx] = bss; | |
f0706e82 JB |
2079 | } |
2080 | ||
2081 | ||
2082 | /* Caller must hold local->sta_bss_lock */ | |
3e122be0 | 2083 | static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, |
f0706e82 JB |
2084 | struct ieee80211_sta_bss *bss) |
2085 | { | |
f0706e82 JB |
2086 | struct ieee80211_sta_bss *b, *prev = NULL; |
2087 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
2088 | while (b) { | |
2089 | if (b == bss) { | |
2090 | if (!prev) | |
2091 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
2092 | bss->hnext; | |
2093 | else | |
2094 | prev->hnext = bss->hnext; | |
2095 | break; | |
2096 | } | |
2097 | prev = b; | |
2098 | b = b->hnext; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | ||
2103 | static struct ieee80211_sta_bss * | |
f698d856 | 2104 | ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq, |
cffdd30d | 2105 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2106 | { |
f698d856 | 2107 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2108 | struct ieee80211_sta_bss *bss; |
2109 | ||
dd00cc48 | 2110 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
2111 | if (!bss) |
2112 | return NULL; | |
f0706e82 JB |
2113 | atomic_inc(&bss->users); |
2114 | atomic_inc(&bss->users); | |
2115 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
8318d78a | 2116 | bss->freq = freq; |
cffdd30d JL |
2117 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
2118 | memcpy(bss->ssid, ssid, ssid_len); | |
2119 | bss->ssid_len = ssid_len; | |
2120 | } | |
f0706e82 JB |
2121 | |
2122 | spin_lock_bh(&local->sta_bss_lock); | |
2123 | /* TODO: order by RSSI? */ | |
2124 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2125 | __ieee80211_rx_bss_hash_add(local, bss); |
f0706e82 JB |
2126 | spin_unlock_bh(&local->sta_bss_lock); |
2127 | return bss; | |
2128 | } | |
2129 | ||
f0706e82 | 2130 | static struct ieee80211_sta_bss * |
f698d856 | 2131 | ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, |
cffdd30d | 2132 | u8 *ssid, u8 ssid_len) |
f0706e82 | 2133 | { |
f0706e82 JB |
2134 | struct ieee80211_sta_bss *bss; |
2135 | ||
2136 | spin_lock_bh(&local->sta_bss_lock); | |
2137 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
2138 | while (bss) { | |
902acc78 JB |
2139 | if (!bss_mesh_cfg(bss) && |
2140 | !memcmp(bss->bssid, bssid, ETH_ALEN) && | |
8318d78a | 2141 | bss->freq == freq && |
cffdd30d JL |
2142 | bss->ssid_len == ssid_len && |
2143 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
2144 | atomic_inc(&bss->users); |
2145 | break; | |
2146 | } | |
2147 | bss = bss->hnext; | |
2148 | } | |
2149 | spin_unlock_bh(&local->sta_bss_lock); | |
2150 | return bss; | |
2151 | } | |
2152 | ||
f709fc69 LCC |
2153 | #ifdef CONFIG_MAC80211_MESH |
2154 | static struct ieee80211_sta_bss * | |
f698d856 | 2155 | ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
f709fc69 LCC |
2156 | u8 *mesh_cfg, int freq) |
2157 | { | |
f709fc69 LCC |
2158 | struct ieee80211_sta_bss *bss; |
2159 | ||
2160 | spin_lock_bh(&local->sta_bss_lock); | |
2161 | bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)]; | |
2162 | while (bss) { | |
902acc78 JB |
2163 | if (bss_mesh_cfg(bss) && |
2164 | !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) && | |
f709fc69 LCC |
2165 | bss->freq == freq && |
2166 | mesh_id_len == bss->mesh_id_len && | |
2167 | (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id, | |
2168 | mesh_id_len))) { | |
2169 | atomic_inc(&bss->users); | |
2170 | break; | |
2171 | } | |
2172 | bss = bss->hnext; | |
2173 | } | |
2174 | spin_unlock_bh(&local->sta_bss_lock); | |
2175 | return bss; | |
2176 | } | |
2177 | ||
2178 | static struct ieee80211_sta_bss * | |
f698d856 | 2179 | ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len, |
05e5e883 | 2180 | u8 *mesh_cfg, int mesh_config_len, int freq) |
f709fc69 | 2181 | { |
f709fc69 LCC |
2182 | struct ieee80211_sta_bss *bss; |
2183 | ||
05e5e883 LCC |
2184 | if (mesh_config_len != MESH_CFG_LEN) |
2185 | return NULL; | |
2186 | ||
f709fc69 LCC |
2187 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
2188 | if (!bss) | |
2189 | return NULL; | |
2190 | ||
24736701 | 2191 | bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC); |
f709fc69 LCC |
2192 | if (!bss->mesh_cfg) { |
2193 | kfree(bss); | |
2194 | return NULL; | |
2195 | } | |
2196 | ||
2197 | if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) { | |
2198 | bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC); | |
2199 | if (!bss->mesh_id) { | |
2200 | kfree(bss->mesh_cfg); | |
2201 | kfree(bss); | |
2202 | return NULL; | |
2203 | } | |
2204 | memcpy(bss->mesh_id, mesh_id, mesh_id_len); | |
2205 | } | |
2206 | ||
2207 | atomic_inc(&bss->users); | |
2208 | atomic_inc(&bss->users); | |
24736701 | 2209 | memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN); |
f709fc69 LCC |
2210 | bss->mesh_id_len = mesh_id_len; |
2211 | bss->freq = freq; | |
2212 | spin_lock_bh(&local->sta_bss_lock); | |
2213 | /* TODO: order by RSSI? */ | |
2214 | list_add_tail(&bss->list, &local->sta_bss_list); | |
f698d856 | 2215 | __ieee80211_rx_bss_hash_add(local, bss); |
f709fc69 LCC |
2216 | spin_unlock_bh(&local->sta_bss_lock); |
2217 | return bss; | |
2218 | } | |
2219 | #endif | |
f0706e82 JB |
2220 | |
2221 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
2222 | { | |
43ac2ca3 | 2223 | kfree(bss->ies); |
902acc78 JB |
2224 | kfree(bss_mesh_id(bss)); |
2225 | kfree(bss_mesh_cfg(bss)); | |
f0706e82 JB |
2226 | kfree(bss); |
2227 | } | |
2228 | ||
2229 | ||
3e122be0 | 2230 | static void ieee80211_rx_bss_put(struct ieee80211_local *local, |
f0706e82 JB |
2231 | struct ieee80211_sta_bss *bss) |
2232 | { | |
1ebebea8 PE |
2233 | local_bh_disable(); |
2234 | if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) { | |
2235 | local_bh_enable(); | |
f0706e82 | 2236 | return; |
1ebebea8 | 2237 | } |
f0706e82 | 2238 | |
3e122be0 | 2239 | __ieee80211_rx_bss_hash_del(local, bss); |
f0706e82 JB |
2240 | list_del(&bss->list); |
2241 | spin_unlock_bh(&local->sta_bss_lock); | |
2242 | ieee80211_rx_bss_free(bss); | |
2243 | } | |
2244 | ||
2245 | ||
3e122be0 | 2246 | void ieee80211_rx_bss_list_init(struct ieee80211_local *local) |
f0706e82 | 2247 | { |
f0706e82 JB |
2248 | spin_lock_init(&local->sta_bss_lock); |
2249 | INIT_LIST_HEAD(&local->sta_bss_list); | |
2250 | } | |
2251 | ||
2252 | ||
3e122be0 | 2253 | void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local) |
f0706e82 | 2254 | { |
f0706e82 JB |
2255 | struct ieee80211_sta_bss *bss, *tmp; |
2256 | ||
2257 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
3e122be0 | 2258 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2259 | } |
2260 | ||
2261 | ||
f698d856 | 2262 | static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
a607268a BR |
2263 | struct ieee80211_if_sta *ifsta, |
2264 | struct ieee80211_sta_bss *bss) | |
2265 | { | |
f698d856 | 2266 | struct ieee80211_local *local = sdata->local; |
a607268a BR |
2267 | int res, rates, i, j; |
2268 | struct sk_buff *skb; | |
2269 | struct ieee80211_mgmt *mgmt; | |
a607268a | 2270 | u8 *pos; |
a607268a | 2271 | struct ieee80211_supported_band *sband; |
507b06d0 | 2272 | union iwreq_data wrqu; |
a607268a BR |
2273 | |
2274 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2275 | ||
2276 | /* Remove possible STA entries from other IBSS networks. */ | |
dc6676b7 | 2277 | sta_info_flush_delayed(sdata); |
a607268a BR |
2278 | |
2279 | if (local->ops->reset_tsf) { | |
2280 | /* Reset own TSF to allow time synchronization work. */ | |
2281 | local->ops->reset_tsf(local_to_hw(local)); | |
2282 | } | |
2283 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
9d139c81 | 2284 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); |
a607268a BR |
2285 | if (res) |
2286 | return res; | |
2287 | ||
2288 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2289 | ||
a607268a BR |
2290 | sdata->drop_unencrypted = bss->capability & |
2291 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2292 | ||
f698d856 | 2293 | res = ieee80211_set_freq(sdata, bss->freq); |
a607268a | 2294 | |
be038b37 AK |
2295 | if (res) |
2296 | return res; | |
a607268a | 2297 | |
9d139c81 | 2298 | /* Build IBSS probe response */ |
a607268a | 2299 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
9d139c81 | 2300 | if (skb) { |
a607268a BR |
2301 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2302 | ||
2303 | mgmt = (struct ieee80211_mgmt *) | |
2304 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2305 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
e7827a70 HH |
2306 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2307 | IEEE80211_STYPE_PROBE_RESP); | |
a607268a | 2308 | memset(mgmt->da, 0xff, ETH_ALEN); |
f698d856 | 2309 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
a607268a BR |
2310 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); |
2311 | mgmt->u.beacon.beacon_int = | |
2312 | cpu_to_le16(local->hw.conf.beacon_int); | |
4faeb860 | 2313 | mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp); |
a607268a BR |
2314 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); |
2315 | ||
2316 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2317 | *pos++ = WLAN_EID_SSID; | |
2318 | *pos++ = ifsta->ssid_len; | |
2319 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2320 | ||
2321 | rates = bss->supp_rates_len; | |
2322 | if (rates > 8) | |
2323 | rates = 8; | |
2324 | pos = skb_put(skb, 2 + rates); | |
2325 | *pos++ = WLAN_EID_SUPP_RATES; | |
2326 | *pos++ = rates; | |
2327 | memcpy(pos, bss->supp_rates, rates); | |
2328 | ||
2329 | if (bss->band == IEEE80211_BAND_2GHZ) { | |
2330 | pos = skb_put(skb, 2 + 1); | |
2331 | *pos++ = WLAN_EID_DS_PARAMS; | |
2332 | *pos++ = 1; | |
2333 | *pos++ = ieee80211_frequency_to_channel(bss->freq); | |
2334 | } | |
2335 | ||
2336 | pos = skb_put(skb, 2 + 2); | |
2337 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2338 | *pos++ = 2; | |
2339 | /* FIX: set ATIM window based on scan results */ | |
2340 | *pos++ = 0; | |
2341 | *pos++ = 0; | |
2342 | ||
2343 | if (bss->supp_rates_len > 8) { | |
2344 | rates = bss->supp_rates_len - 8; | |
2345 | pos = skb_put(skb, 2 + rates); | |
2346 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2347 | *pos++ = rates; | |
2348 | memcpy(pos, &bss->supp_rates[8], rates); | |
2349 | } | |
2350 | ||
9d139c81 | 2351 | ifsta->probe_resp = skb; |
e039fa4a | 2352 | |
9d139c81 JB |
2353 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
2354 | } | |
a607268a | 2355 | |
9d139c81 JB |
2356 | rates = 0; |
2357 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2358 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2359 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2360 | for (j = 0; j < sband->n_bitrates; j++) | |
2361 | if (sband->bitrates[j].bitrate == bitrate) | |
2362 | rates |= BIT(j); | |
a607268a | 2363 | } |
9d139c81 JB |
2364 | ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates; |
2365 | ||
f698d856 | 2366 | ieee80211_sta_def_wmm_params(sdata, bss, 1); |
a607268a | 2367 | |
48c2fc59 | 2368 | ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED; |
a607268a BR |
2369 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); |
2370 | ||
507b06d0 DW |
2371 | memset(&wrqu, 0, sizeof(wrqu)); |
2372 | memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
f698d856 | 2373 | wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL); |
a607268a BR |
2374 | |
2375 | return res; | |
2376 | } | |
2377 | ||
f709fc69 LCC |
2378 | u64 ieee80211_sta_get_rates(struct ieee80211_local *local, |
2379 | struct ieee802_11_elems *elems, | |
2380 | enum ieee80211_band band) | |
2381 | { | |
2382 | struct ieee80211_supported_band *sband; | |
2383 | struct ieee80211_rate *bitrates; | |
2384 | size_t num_rates; | |
2385 | u64 supp_rates; | |
2386 | int i, j; | |
2387 | sband = local->hw.wiphy->bands[band]; | |
2388 | ||
2389 | if (!sband) { | |
2390 | WARN_ON(1); | |
2391 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2392 | } | |
2393 | ||
2394 | bitrates = sband->bitrates; | |
2395 | num_rates = sband->n_bitrates; | |
2396 | supp_rates = 0; | |
2397 | for (i = 0; i < elems->supp_rates_len + | |
2398 | elems->ext_supp_rates_len; i++) { | |
2399 | u8 rate = 0; | |
2400 | int own_rate; | |
2401 | if (i < elems->supp_rates_len) | |
2402 | rate = elems->supp_rates[i]; | |
2403 | else if (elems->ext_supp_rates) | |
2404 | rate = elems->ext_supp_rates | |
2405 | [i - elems->supp_rates_len]; | |
2406 | own_rate = 5 * (rate & 0x7f); | |
2407 | for (j = 0; j < num_rates; j++) | |
2408 | if (bitrates[j].bitrate == own_rate) | |
2409 | supp_rates |= BIT(j); | |
2410 | } | |
2411 | return supp_rates; | |
2412 | } | |
2413 | ||
8e1535d5 EG |
2414 | static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local, |
2415 | enum ieee80211_band band) | |
2416 | { | |
2417 | struct ieee80211_supported_band *sband; | |
2418 | struct ieee80211_rate *bitrates; | |
2419 | u64 mandatory_rates; | |
2420 | enum ieee80211_rate_flags mandatory_flag; | |
2421 | int i; | |
2422 | ||
2423 | sband = local->hw.wiphy->bands[band]; | |
2424 | if (!sband) { | |
2425 | WARN_ON(1); | |
2426 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
2427 | } | |
2428 | ||
2429 | if (band == IEEE80211_BAND_2GHZ) | |
2430 | mandatory_flag = IEEE80211_RATE_MANDATORY_B; | |
2431 | else | |
2432 | mandatory_flag = IEEE80211_RATE_MANDATORY_A; | |
2433 | ||
2434 | bitrates = sband->bitrates; | |
2435 | mandatory_rates = 0; | |
2436 | for (i = 0; i < sband->n_bitrates; i++) | |
2437 | if (bitrates[i].flags & mandatory_flag) | |
2438 | mandatory_rates |= BIT(i); | |
2439 | return mandatory_rates; | |
2440 | } | |
a607268a | 2441 | |
f698d856 | 2442 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2443 | struct ieee80211_mgmt *mgmt, |
2444 | size_t len, | |
2445 | struct ieee80211_rx_status *rx_status, | |
9859b81e | 2446 | struct ieee802_11_elems *elems) |
f0706e82 | 2447 | { |
f698d856 | 2448 | struct ieee80211_local *local = sdata->local; |
8318d78a | 2449 | int freq, clen; |
f0706e82 JB |
2450 | struct ieee80211_sta_bss *bss; |
2451 | struct sta_info *sta; | |
fab7d4a2 | 2452 | struct ieee80211_channel *channel; |
8e1535d5 EG |
2453 | u64 beacon_timestamp, rx_timestamp; |
2454 | u64 supp_rates = 0; | |
9859b81e | 2455 | bool beacon = ieee80211_is_beacon(mgmt->frame_control); |
8e1535d5 | 2456 | enum ieee80211_band band = rx_status->band; |
0795af57 JP |
2457 | DECLARE_MAC_BUF(mac); |
2458 | DECLARE_MAC_BUF(mac2); | |
f0706e82 | 2459 | |
5bda6175 JB |
2460 | if (elems->ds_params && elems->ds_params_len == 1) |
2461 | freq = ieee80211_channel_to_frequency(elems->ds_params[0]); | |
2462 | else | |
2463 | freq = rx_status->freq; | |
2464 | ||
2465 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
2466 | ||
2467 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
2468 | return; | |
f0706e82 | 2469 | |
ae6a44e3 | 2470 | if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id && |
f698d856 | 2471 | elems->mesh_config && mesh_matches_local(elems, sdata)) { |
8e1535d5 | 2472 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
902acc78 | 2473 | |
8e1535d5 | 2474 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
f698d856 | 2475 | mesh_peer_accepts_plinks(elems)); |
902acc78 | 2476 | } |
f709fc69 | 2477 | |
ae6a44e3 | 2478 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && |
8e1535d5 | 2479 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
8e1535d5 EG |
2480 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
2481 | ||
69e6c010 JB |
2482 | rcu_read_lock(); |
2483 | ||
8e1535d5 EG |
2484 | sta = sta_info_get(local, mgmt->sa); |
2485 | if (sta) { | |
2486 | u64 prev_rates; | |
2487 | ||
2488 | prev_rates = sta->supp_rates[band]; | |
2489 | /* make sure mandatory rates are always added */ | |
2490 | sta->supp_rates[band] = supp_rates | | |
2491 | ieee80211_sta_get_mandatory_rates(local, band); | |
2492 | ||
2493 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2494 | if (sta->supp_rates[band] != prev_rates) | |
2495 | printk(KERN_DEBUG "%s: updated supp_rates set " | |
2496 | "for %s based on beacon info (0x%llx | " | |
2497 | "0x%llx -> 0x%llx)\n", | |
2498 | sdata->dev->name, print_mac(mac, sta->addr), | |
2499 | (unsigned long long) prev_rates, | |
2500 | (unsigned long long) supp_rates, | |
2501 | (unsigned long long) sta->supp_rates[band]); | |
2502 | #endif | |
2503 | } else { | |
2504 | ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, | |
2505 | mgmt->sa, supp_rates); | |
f0706e82 | 2506 | } |
f0706e82 | 2507 | |
69e6c010 JB |
2508 | rcu_read_unlock(); |
2509 | } | |
d0709a65 | 2510 | |
f709fc69 | 2511 | #ifdef CONFIG_MAC80211_MESH |
ae6a44e3 | 2512 | if (elems->mesh_config) |
f698d856 | 2513 | bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id, |
ae6a44e3 | 2514 | elems->mesh_id_len, elems->mesh_config, freq); |
f709fc69 LCC |
2515 | else |
2516 | #endif | |
f698d856 | 2517 | bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq, |
ae6a44e3 | 2518 | elems->ssid, elems->ssid_len); |
f709fc69 LCC |
2519 | if (!bss) { |
2520 | #ifdef CONFIG_MAC80211_MESH | |
ae6a44e3 | 2521 | if (elems->mesh_config) |
f698d856 | 2522 | bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id, |
ae6a44e3 EK |
2523 | elems->mesh_id_len, elems->mesh_config, |
2524 | elems->mesh_config_len, freq); | |
f709fc69 LCC |
2525 | else |
2526 | #endif | |
f698d856 | 2527 | bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq, |
ae6a44e3 | 2528 | elems->ssid, elems->ssid_len); |
f0706e82 JB |
2529 | if (!bss) |
2530 | return; | |
2531 | } else { | |
2532 | #if 0 | |
2533 | /* TODO: order by RSSI? */ | |
2534 | spin_lock_bh(&local->sta_bss_lock); | |
2535 | list_move_tail(&bss->list, &local->sta_bss_list); | |
2536 | spin_unlock_bh(&local->sta_bss_lock); | |
2537 | #endif | |
2538 | } | |
2539 | ||
5628221c | 2540 | /* save the ERP value so that it is available at association time */ |
ae6a44e3 EK |
2541 | if (elems->erp_info && elems->erp_info_len >= 1) { |
2542 | bss->erp_value = elems->erp_info[0]; | |
5628221c DD |
2543 | bss->has_erp_value = 1; |
2544 | } | |
2545 | ||
f0706e82 JB |
2546 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
2547 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 | 2548 | |
98f7dfd8 EG |
2549 | if (elems->tim) { |
2550 | struct ieee80211_tim_ie *tim_ie = | |
2551 | (struct ieee80211_tim_ie *)elems->tim; | |
2552 | bss->dtim_period = tim_ie->dtim_period; | |
2553 | } | |
2554 | ||
2555 | /* set default value for buggy APs */ | |
2556 | if (!elems->tim || bss->dtim_period == 0) | |
2557 | bss->dtim_period = 1; | |
2558 | ||
f0706e82 | 2559 | bss->supp_rates_len = 0; |
ae6a44e3 | 2560 | if (elems->supp_rates) { |
f0706e82 | 2561 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2562 | if (clen > elems->supp_rates_len) |
2563 | clen = elems->supp_rates_len; | |
2564 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates, | |
f0706e82 JB |
2565 | clen); |
2566 | bss->supp_rates_len += clen; | |
2567 | } | |
ae6a44e3 | 2568 | if (elems->ext_supp_rates) { |
f0706e82 | 2569 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; |
ae6a44e3 EK |
2570 | if (clen > elems->ext_supp_rates_len) |
2571 | clen = elems->ext_supp_rates_len; | |
f0706e82 | 2572 | memcpy(&bss->supp_rates[bss->supp_rates_len], |
ae6a44e3 | 2573 | elems->ext_supp_rates, clen); |
f0706e82 JB |
2574 | bss->supp_rates_len += clen; |
2575 | } | |
2576 | ||
8e1535d5 | 2577 | bss->band = band; |
30b89b0f | 2578 | |
5bda6175 JB |
2579 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
2580 | ||
30b89b0f JB |
2581 | bss->timestamp = beacon_timestamp; |
2582 | bss->last_update = jiffies; | |
30b89b0f JB |
2583 | bss->signal = rx_status->signal; |
2584 | bss->noise = rx_status->noise; | |
566bfe5a | 2585 | bss->qual = rx_status->qual; |
9859b81e RR |
2586 | if (!beacon) |
2587 | bss->last_probe_resp = jiffies; | |
30b89b0f JB |
2588 | /* |
2589 | * In STA mode, the remaining parameters should not be overridden | |
2590 | * by beacons because they're not necessarily accurate there. | |
2591 | */ | |
2592 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
9859b81e | 2593 | bss->last_probe_resp && beacon) { |
3e122be0 | 2594 | ieee80211_rx_bss_put(local, bss); |
30b89b0f JB |
2595 | return; |
2596 | } | |
2597 | ||
43ac2ca3 JM |
2598 | if (bss->ies == NULL || bss->ies_len < elems->total_len) { |
2599 | kfree(bss->ies); | |
2600 | bss->ies = kmalloc(elems->total_len, GFP_ATOMIC); | |
f0706e82 | 2601 | } |
43ac2ca3 JM |
2602 | if (bss->ies) { |
2603 | memcpy(bss->ies, elems->ie_start, elems->total_len); | |
2604 | bss->ies_len = elems->total_len; | |
2605 | } else | |
2606 | bss->ies_len = 0; | |
f0706e82 | 2607 | |
43ac2ca3 | 2608 | bss->wmm_used = elems->wmm_param || elems->wmm_info; |
9d9bf77d BR |
2609 | |
2610 | /* check if we need to merge IBSS */ | |
2611 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && | |
2612 | !local->sta_sw_scanning && !local->sta_hw_scanning && | |
fba4a1e6 | 2613 | bss->capability & WLAN_CAPABILITY_IBSS && |
9d9bf77d | 2614 | bss->freq == local->oper_channel->center_freq && |
ae6a44e3 EK |
2615 | elems->ssid_len == sdata->u.sta.ssid_len && |
2616 | memcmp(elems->ssid, sdata->u.sta.ssid, | |
2617 | sdata->u.sta.ssid_len) == 0) { | |
9d9bf77d BR |
2618 | if (rx_status->flag & RX_FLAG_TSFT) { |
2619 | /* in order for correct IBSS merging we need mactime | |
2620 | * | |
2621 | * since mactime is defined as the time the first data | |
2622 | * symbol of the frame hits the PHY, and the timestamp | |
2623 | * of the beacon is defined as "the time that the data | |
2624 | * symbol containing the first bit of the timestamp is | |
2625 | * transmitted to the PHY plus the transmitting STA’s | |
2626 | * delays through its local PHY from the MAC-PHY | |
2627 | * interface to its interface with the WM" | |
2628 | * (802.11 11.1.2) - equals the time this bit arrives at | |
2629 | * the receiver - we have to take into account the | |
2630 | * offset between the two. | |
2631 | * e.g: at 1 MBit that means mactime is 192 usec earlier | |
2632 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. | |
2633 | */ | |
8e1535d5 | 2634 | int rate = local->hw.wiphy->bands[band]-> |
9d9bf77d BR |
2635 | bitrates[rx_status->rate_idx].bitrate; |
2636 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); | |
2637 | } else if (local && local->ops && local->ops->get_tsf) | |
2638 | /* second best option: get current TSF */ | |
2639 | rx_timestamp = local->ops->get_tsf(local_to_hw(local)); | |
2640 | else | |
2641 | /* can't merge without knowing the TSF */ | |
2642 | rx_timestamp = -1LLU; | |
2643 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2644 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" | |
2645 | "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", | |
2646 | print_mac(mac, mgmt->sa), | |
2647 | print_mac(mac2, mgmt->bssid), | |
2648 | (unsigned long long)rx_timestamp, | |
2649 | (unsigned long long)beacon_timestamp, | |
2650 | (unsigned long long)(rx_timestamp - beacon_timestamp), | |
2651 | jiffies); | |
2652 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2653 | if (beacon_timestamp > rx_timestamp) { | |
576fdeae | 2654 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
f4ea83dd JB |
2655 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
2656 | "local TSF - IBSS merge with BSSID %s\n", | |
f698d856 | 2657 | sdata->dev->name, print_mac(mac, mgmt->bssid)); |
fba4a1e6 | 2658 | #endif |
f698d856 JBG |
2659 | ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss); |
2660 | ieee80211_ibss_add_sta(sdata, NULL, | |
87291c02 | 2661 | mgmt->bssid, mgmt->sa, |
8e1535d5 | 2662 | supp_rates); |
9d9bf77d BR |
2663 | } |
2664 | } | |
2665 | ||
3e122be0 | 2666 | ieee80211_rx_bss_put(local, bss); |
f0706e82 JB |
2667 | } |
2668 | ||
2669 | ||
f698d856 | 2670 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2671 | struct ieee80211_mgmt *mgmt, |
2672 | size_t len, | |
2673 | struct ieee80211_rx_status *rx_status) | |
2674 | { | |
ae6a44e3 EK |
2675 | size_t baselen; |
2676 | struct ieee802_11_elems elems; | |
9859b81e | 2677 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
ae6a44e3 | 2678 | |
8e7cdbb6 TW |
2679 | if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN)) |
2680 | return; /* ignore ProbeResp to foreign address */ | |
2681 | ||
ae6a44e3 EK |
2682 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
2683 | if (baselen > len) | |
2684 | return; | |
2685 | ||
2686 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
2687 | &elems); | |
2688 | ||
9859b81e RR |
2689 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
2690 | ||
2691 | /* direct probe may be part of the association flow */ | |
2692 | if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE, | |
2693 | &ifsta->request)) { | |
2694 | printk(KERN_DEBUG "%s direct probe responded\n", | |
2695 | sdata->dev->name); | |
2696 | ieee80211_authenticate(sdata, ifsta); | |
2697 | } | |
f0706e82 JB |
2698 | } |
2699 | ||
2700 | ||
f698d856 | 2701 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2702 | struct ieee80211_mgmt *mgmt, |
2703 | size_t len, | |
2704 | struct ieee80211_rx_status *rx_status) | |
2705 | { | |
f0706e82 | 2706 | struct ieee80211_if_sta *ifsta; |
f0706e82 JB |
2707 | size_t baselen; |
2708 | struct ieee802_11_elems elems; | |
f698d856 | 2709 | struct ieee80211_local *local = sdata->local; |
d3c990fb | 2710 | struct ieee80211_conf *conf = &local->hw.conf; |
471b3efd | 2711 | u32 changed = 0; |
f0706e82 | 2712 | |
ae6a44e3 EK |
2713 | /* Process beacon from the current BSS */ |
2714 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2715 | if (baselen > len) | |
2716 | return; | |
2717 | ||
2718 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); | |
2719 | ||
9859b81e | 2720 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
f0706e82 | 2721 | |
51fb61e7 | 2722 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2723 | return; |
2724 | ifsta = &sdata->u.sta; | |
2725 | ||
d6f2da5b | 2726 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2727 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2728 | return; | |
2729 | ||
d18ef29f | 2730 | /* Do not send changes to driver if we are scanning. This removes |
fe3fa827 JB |
2731 | * requirement that a driver's bss_info_changed/conf_tx functions |
2732 | * need to be atomic. | |
2733 | * This is really ugly code, we should rewrite scanning and make | |
2734 | * all this more understandable for humans. | |
2735 | */ | |
d18ef29f RC |
2736 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
2737 | return; | |
2738 | ||
fe3fa827 JB |
2739 | ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param, |
2740 | elems.wmm_param_len); | |
2741 | ||
5628221c | 2742 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2743 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
50c4afb9 JL |
2744 | else { |
2745 | u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info); | |
2746 | changed |= ieee80211_handle_protect_preamb(sdata, false, | |
2747 | (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0); | |
2748 | } | |
f0706e82 | 2749 | |
d3c990fb | 2750 | if (elems.ht_cap_elem && elems.ht_info_elem && |
38668c05 | 2751 | elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { |
d3c990fb RR |
2752 | struct ieee80211_ht_bss_info bss_info; |
2753 | ||
2754 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2755 | (struct ieee80211_ht_addt_info *) | |
2756 | elems.ht_info_elem, &bss_info); | |
38668c05 TW |
2757 | changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf, |
2758 | &bss_info); | |
d3c990fb RR |
2759 | } |
2760 | ||
471b3efd | 2761 | ieee80211_bss_info_change_notify(sdata, changed); |
f0706e82 JB |
2762 | } |
2763 | ||
2764 | ||
f698d856 | 2765 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2766 | struct ieee80211_if_sta *ifsta, |
2767 | struct ieee80211_mgmt *mgmt, | |
2768 | size_t len, | |
2769 | struct ieee80211_rx_status *rx_status) | |
2770 | { | |
f698d856 | 2771 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2772 | int tx_last_beacon; |
2773 | struct sk_buff *skb; | |
2774 | struct ieee80211_mgmt *resp; | |
2775 | u8 *pos, *end; | |
0795af57 JP |
2776 | DECLARE_MAC_BUF(mac); |
2777 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2778 | DECLARE_MAC_BUF(mac2); | |
2779 | DECLARE_MAC_BUF(mac3); | |
2780 | #endif | |
f0706e82 | 2781 | |
51fb61e7 | 2782 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
48c2fc59 | 2783 | ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED || |
f0706e82 JB |
2784 | len < 24 + 2 || !ifsta->probe_resp) |
2785 | return; | |
2786 | ||
2787 | if (local->ops->tx_last_beacon) | |
2788 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2789 | else | |
2790 | tx_last_beacon = 1; | |
2791 | ||
2792 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2793 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2794 | "%s (tx_last_beacon=%d)\n", | |
f698d856 | 2795 | sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), |
0795af57 | 2796 | print_mac(mac3, mgmt->bssid), tx_last_beacon); |
f0706e82 JB |
2797 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2798 | ||
2799 | if (!tx_last_beacon) | |
2800 | return; | |
2801 | ||
2802 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2803 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2804 | return; | |
2805 | ||
2806 | end = ((u8 *) mgmt) + len; | |
2807 | pos = mgmt->u.probe_req.variable; | |
2808 | if (pos[0] != WLAN_EID_SSID || | |
2809 | pos + 2 + pos[1] > end) { | |
f4ea83dd JB |
2810 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
2811 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
2812 | "from %s\n", | |
f698d856 | 2813 | sdata->dev->name, print_mac(mac, mgmt->sa)); |
f4ea83dd | 2814 | #endif |
f0706e82 JB |
2815 | return; |
2816 | } | |
2817 | if (pos[1] != 0 && | |
2818 | (pos[1] != ifsta->ssid_len || | |
2819 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2820 | /* Ignore ProbeReq for foreign SSID */ | |
2821 | return; | |
2822 | } | |
2823 | ||
2824 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2825 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2826 | if (!skb) |
2827 | return; | |
2828 | ||
2829 | resp = (struct ieee80211_mgmt *) skb->data; | |
2830 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2831 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 | 2832 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
f698d856 | 2833 | sdata->dev->name, print_mac(mac, resp->da)); |
f0706e82 | 2834 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
f698d856 | 2835 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
2836 | } |
2837 | ||
f698d856 | 2838 | static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
4e20cb29 JB |
2839 | struct ieee80211_if_sta *ifsta, |
2840 | struct ieee80211_mgmt *mgmt, | |
f709fc69 LCC |
2841 | size_t len, |
2842 | struct ieee80211_rx_status *rx_status) | |
9f985b0e | 2843 | { |
f698d856 | 2844 | struct ieee80211_local *local = sdata->local; |
f709fc69 | 2845 | |
9c80d3dc JB |
2846 | /* all categories we currently handle have action_code */ |
2847 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
9f985b0e RR |
2848 | return; |
2849 | ||
2850 | switch (mgmt->u.action.category) { | |
b6623486 AK |
2851 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
2852 | if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ) | |
2853 | break; | |
5fd12d4d | 2854 | switch (mgmt->u.action.u.measurement.action_code) { |
b6623486 AK |
2855 | case WLAN_ACTION_SPCT_MSR_REQ: |
2856 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2857 | sizeof(mgmt->u.action.u.measurement))) | |
2858 | break; | |
f698d856 | 2859 | ieee80211_sta_process_measurement_req(sdata, mgmt, len); |
b6623486 AK |
2860 | break; |
2861 | } | |
2862 | break; | |
9f985b0e RR |
2863 | case WLAN_CATEGORY_BACK: |
2864 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2865 | case WLAN_ACTION_ADDBA_REQ: | |
2866 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2867 | sizeof(mgmt->u.action.u.addba_req))) | |
2868 | break; | |
f698d856 | 2869 | ieee80211_sta_process_addba_request(local, mgmt, len); |
9f985b0e | 2870 | break; |
eadc8d9e RR |
2871 | case WLAN_ACTION_ADDBA_RESP: |
2872 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2873 | sizeof(mgmt->u.action.u.addba_resp))) | |
2874 | break; | |
f698d856 | 2875 | ieee80211_sta_process_addba_resp(local, mgmt, len); |
eadc8d9e | 2876 | break; |
688b88a4 RR |
2877 | case WLAN_ACTION_DELBA: |
2878 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2879 | sizeof(mgmt->u.action.u.delba))) | |
2880 | break; | |
f698d856 | 2881 | ieee80211_sta_process_delba(sdata, mgmt, len); |
688b88a4 | 2882 | break; |
9f985b0e RR |
2883 | } |
2884 | break; | |
f709fc69 | 2885 | case PLINK_CATEGORY: |
902acc78 | 2886 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2887 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
f709fc69 | 2888 | break; |
f709fc69 | 2889 | case MESH_PATH_SEL_CATEGORY: |
902acc78 | 2890 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 2891 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
f709fc69 | 2892 | break; |
9f985b0e RR |
2893 | } |
2894 | } | |
f0706e82 | 2895 | |
f698d856 | 2896 | void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
f0706e82 JB |
2897 | struct ieee80211_rx_status *rx_status) |
2898 | { | |
f698d856 | 2899 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
2900 | struct ieee80211_if_sta *ifsta; |
2901 | struct ieee80211_mgmt *mgmt; | |
2902 | u16 fc; | |
2903 | ||
2904 | if (skb->len < 24) | |
2905 | goto fail; | |
2906 | ||
f0706e82 JB |
2907 | ifsta = &sdata->u.sta; |
2908 | ||
2909 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2910 | fc = le16_to_cpu(mgmt->frame_control); | |
2911 | ||
2912 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2913 | case IEEE80211_STYPE_PROBE_REQ: | |
2914 | case IEEE80211_STYPE_PROBE_RESP: | |
2915 | case IEEE80211_STYPE_BEACON: | |
f709fc69 | 2916 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2917 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); |
2918 | case IEEE80211_STYPE_AUTH: | |
2919 | case IEEE80211_STYPE_ASSOC_RESP: | |
2920 | case IEEE80211_STYPE_REASSOC_RESP: | |
2921 | case IEEE80211_STYPE_DEAUTH: | |
2922 | case IEEE80211_STYPE_DISASSOC: | |
2923 | skb_queue_tail(&ifsta->skb_queue, skb); | |
2924 | queue_work(local->hw.workqueue, &ifsta->work); | |
2925 | return; | |
f0706e82 JB |
2926 | } |
2927 | ||
2928 | fail: | |
2929 | kfree_skb(skb); | |
2930 | } | |
2931 | ||
f698d856 | 2932 | static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
2933 | struct sk_buff *skb) |
2934 | { | |
2935 | struct ieee80211_rx_status *rx_status; | |
f0706e82 JB |
2936 | struct ieee80211_if_sta *ifsta; |
2937 | struct ieee80211_mgmt *mgmt; | |
2938 | u16 fc; | |
2939 | ||
f0706e82 JB |
2940 | ifsta = &sdata->u.sta; |
2941 | ||
2942 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2943 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2944 | fc = le16_to_cpu(mgmt->frame_control); | |
2945 | ||
2946 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2947 | case IEEE80211_STYPE_PROBE_REQ: | |
f698d856 | 2948 | ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len, |
f0706e82 JB |
2949 | rx_status); |
2950 | break; | |
2951 | case IEEE80211_STYPE_PROBE_RESP: | |
f698d856 | 2952 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2953 | break; |
2954 | case IEEE80211_STYPE_BEACON: | |
f698d856 | 2955 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
f0706e82 JB |
2956 | break; |
2957 | case IEEE80211_STYPE_AUTH: | |
f698d856 | 2958 | ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2959 | break; |
2960 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2961 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2962 | break; |
2963 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2964 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2965 | break; |
2966 | case IEEE80211_STYPE_DEAUTH: | |
f698d856 | 2967 | ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len); |
f0706e82 JB |
2968 | break; |
2969 | case IEEE80211_STYPE_DISASSOC: | |
f698d856 | 2970 | ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len); |
f0706e82 | 2971 | break; |
9f985b0e | 2972 | case IEEE80211_STYPE_ACTION: |
f698d856 | 2973 | ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status); |
9f985b0e | 2974 | break; |
f0706e82 JB |
2975 | } |
2976 | ||
2977 | kfree_skb(skb); | |
2978 | } | |
2979 | ||
2980 | ||
9ae54c84 | 2981 | ieee80211_rx_result |
f698d856 | 2982 | ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
ece8eddd | 2983 | struct ieee80211_rx_status *rx_status) |
f0706e82 JB |
2984 | { |
2985 | struct ieee80211_mgmt *mgmt; | |
4e3996fe | 2986 | __le16 fc; |
f0706e82 | 2987 | |
ece8eddd | 2988 | if (skb->len < 2) |
e4c26add | 2989 | return RX_DROP_UNUSABLE; |
f0706e82 JB |
2990 | |
2991 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
4e3996fe | 2992 | fc = mgmt->frame_control; |
f0706e82 | 2993 | |
4e3996fe | 2994 | if (ieee80211_is_ctl(fc)) |
9ae54c84 | 2995 | return RX_CONTINUE; |
ece8eddd ZY |
2996 | |
2997 | if (skb->len < 24) | |
e4c26add | 2998 | return RX_DROP_MONITOR; |
ece8eddd | 2999 | |
4e3996fe | 3000 | if (ieee80211_is_probe_resp(fc)) { |
f698d856 | 3001 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3002 | dev_kfree_skb(skb); |
3003 | return RX_QUEUED; | |
f0706e82 | 3004 | } |
4e3996fe HH |
3005 | |
3006 | if (ieee80211_is_beacon(fc)) { | |
f698d856 | 3007 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status); |
4e3996fe HH |
3008 | dev_kfree_skb(skb); |
3009 | return RX_QUEUED; | |
3010 | } | |
3011 | ||
9ae54c84 | 3012 | return RX_CONTINUE; |
f0706e82 JB |
3013 | } |
3014 | ||
3015 | ||
f698d856 | 3016 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 3017 | { |
f698d856 | 3018 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3019 | int active = 0; |
3020 | struct sta_info *sta; | |
3021 | ||
d0709a65 JB |
3022 | rcu_read_lock(); |
3023 | ||
3024 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3025 | if (sta->sdata == sdata && | |
f0706e82 JB |
3026 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
3027 | jiffies)) { | |
3028 | active++; | |
3029 | break; | |
3030 | } | |
3031 | } | |
d0709a65 JB |
3032 | |
3033 | rcu_read_unlock(); | |
f0706e82 JB |
3034 | |
3035 | return active; | |
3036 | } | |
3037 | ||
3038 | ||
f698d856 | 3039 | static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) |
f0706e82 | 3040 | { |
f698d856 | 3041 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3042 | struct sta_info *sta, *tmp; |
be8755e1 | 3043 | LIST_HEAD(tmp_list); |
0795af57 | 3044 | DECLARE_MAC_BUF(mac); |
d0709a65 | 3045 | unsigned long flags; |
f0706e82 | 3046 | |
d0709a65 | 3047 | spin_lock_irqsave(&local->sta_lock, flags); |
f0706e82 | 3048 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
f709fc69 | 3049 | if (time_after(jiffies, sta->last_rx + exp_time)) { |
f4ea83dd | 3050 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
0795af57 | 3051 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
f698d856 | 3052 | sdata->dev->name, print_mac(mac, sta->addr)); |
f4ea83dd | 3053 | #endif |
cb585bcc | 3054 | __sta_info_unlink(&sta); |
d0709a65 JB |
3055 | if (sta) |
3056 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 3057 | } |
d0709a65 | 3058 | spin_unlock_irqrestore(&local->sta_lock, flags); |
be8755e1 | 3059 | |
d0709a65 JB |
3060 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) |
3061 | sta_info_destroy(sta); | |
f0706e82 JB |
3062 | } |
3063 | ||
3064 | ||
f698d856 | 3065 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3066 | struct ieee80211_if_sta *ifsta) |
3067 | { | |
3068 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
3069 | ||
f698d856 JBG |
3070 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
3071 | if (ieee80211_sta_active_ibss(sdata)) | |
f0706e82 JB |
3072 | return; |
3073 | ||
3074 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
f698d856 JBG |
3075 | "IBSS networks with same SSID (merge)\n", sdata->dev->name); |
3076 | ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
3077 | } |
3078 | ||
3079 | ||
f709fc69 | 3080 | #ifdef CONFIG_MAC80211_MESH |
f698d856 | 3081 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
f709fc69 LCC |
3082 | struct ieee80211_if_sta *ifsta) |
3083 | { | |
f709fc69 LCC |
3084 | bool free_plinks; |
3085 | ||
f698d856 JBG |
3086 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
3087 | mesh_path_expire(sdata); | |
f709fc69 LCC |
3088 | |
3089 | free_plinks = mesh_plink_availables(sdata); | |
3090 | if (free_plinks != sdata->u.sta.accepting_plinks) | |
9d139c81 | 3091 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3092 | |
3093 | mod_timer(&ifsta->timer, jiffies + | |
3094 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL); | |
3095 | } | |
3096 | ||
3097 | ||
f698d856 | 3098 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
f709fc69 LCC |
3099 | { |
3100 | struct ieee80211_if_sta *ifsta; | |
f709fc69 | 3101 | ifsta = &sdata->u.sta; |
48c2fc59 | 3102 | ifsta->state = IEEE80211_STA_MLME_MESH_UP; |
f709fc69 | 3103 | ieee80211_sta_timer((unsigned long)sdata); |
56a6d13d | 3104 | ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON); |
f709fc69 LCC |
3105 | } |
3106 | #endif | |
3107 | ||
3108 | ||
f0706e82 JB |
3109 | void ieee80211_sta_timer(unsigned long data) |
3110 | { | |
3111 | struct ieee80211_sub_if_data *sdata = | |
3112 | (struct ieee80211_sub_if_data *) data; | |
3113 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
f698d856 | 3114 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3115 | |
3116 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3117 | queue_work(local->hw.workqueue, &ifsta->work); | |
3118 | } | |
3119 | ||
f0706e82 JB |
3120 | void ieee80211_sta_work(struct work_struct *work) |
3121 | { | |
3122 | struct ieee80211_sub_if_data *sdata = | |
3123 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
f698d856 | 3124 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3125 | struct ieee80211_if_sta *ifsta; |
3126 | struct sk_buff *skb; | |
3127 | ||
f698d856 | 3128 | if (!netif_running(sdata->dev)) |
f0706e82 JB |
3129 | return; |
3130 | ||
ece8eddd | 3131 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
3132 | return; |
3133 | ||
f4ea83dd JB |
3134 | if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA && |
3135 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS && | |
3136 | sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT)) | |
f0706e82 | 3137 | return; |
f0706e82 JB |
3138 | ifsta = &sdata->u.sta; |
3139 | ||
3140 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
f698d856 | 3141 | ieee80211_sta_rx_queued_mgmt(sdata, skb); |
f0706e82 | 3142 | |
f709fc69 | 3143 | #ifdef CONFIG_MAC80211_MESH |
902acc78 JB |
3144 | if (ifsta->preq_queue_len && |
3145 | time_after(jiffies, | |
3146 | ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
f698d856 | 3147 | mesh_path_start_discovery(sdata); |
f709fc69 LCC |
3148 | #endif |
3149 | ||
9859b81e RR |
3150 | if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE && |
3151 | ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE && | |
48c2fc59 | 3152 | ifsta->state != IEEE80211_STA_MLME_ASSOCIATE && |
f0706e82 | 3153 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { |
a0af5f14 | 3154 | if (ifsta->scan_ssid_len) |
f698d856 | 3155 | ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len); |
a0af5f14 | 3156 | else |
f698d856 | 3157 | ieee80211_sta_start_scan(sdata, NULL, 0); |
f0706e82 JB |
3158 | return; |
3159 | } | |
3160 | ||
3161 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
f698d856 | 3162 | if (ieee80211_sta_config_auth(sdata, ifsta)) |
f0706e82 JB |
3163 | return; |
3164 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
3165 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
3166 | return; | |
3167 | ||
3168 | switch (ifsta->state) { | |
48c2fc59 | 3169 | case IEEE80211_STA_MLME_DISABLED: |
f0706e82 | 3170 | break; |
9859b81e RR |
3171 | case IEEE80211_STA_MLME_DIRECT_PROBE: |
3172 | ieee80211_direct_probe(sdata, ifsta); | |
3173 | break; | |
48c2fc59 | 3174 | case IEEE80211_STA_MLME_AUTHENTICATE: |
f698d856 | 3175 | ieee80211_authenticate(sdata, ifsta); |
f0706e82 | 3176 | break; |
48c2fc59 | 3177 | case IEEE80211_STA_MLME_ASSOCIATE: |
f698d856 | 3178 | ieee80211_associate(sdata, ifsta); |
f0706e82 | 3179 | break; |
48c2fc59 | 3180 | case IEEE80211_STA_MLME_ASSOCIATED: |
f698d856 | 3181 | ieee80211_associated(sdata, ifsta); |
f0706e82 | 3182 | break; |
48c2fc59 | 3183 | case IEEE80211_STA_MLME_IBSS_SEARCH: |
f698d856 | 3184 | ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3185 | break; |
48c2fc59 | 3186 | case IEEE80211_STA_MLME_IBSS_JOINED: |
f698d856 | 3187 | ieee80211_sta_merge_ibss(sdata, ifsta); |
f0706e82 | 3188 | break; |
f709fc69 | 3189 | #ifdef CONFIG_MAC80211_MESH |
48c2fc59 | 3190 | case IEEE80211_STA_MLME_MESH_UP: |
f698d856 | 3191 | ieee80211_mesh_housekeeping(sdata, ifsta); |
f709fc69 LCC |
3192 | break; |
3193 | #endif | |
f0706e82 | 3194 | default: |
f4ea83dd | 3195 | WARN_ON(1); |
f0706e82 JB |
3196 | break; |
3197 | } | |
3198 | ||
f698d856 | 3199 | if (ieee80211_privacy_mismatch(sdata, ifsta)) { |
f0706e82 | 3200 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " |
f698d856 | 3201 | "mixed-cell disabled - disassociate\n", sdata->dev->name); |
f0706e82 | 3202 | |
f698d856 JBG |
3203 | ieee80211_send_disassoc(sdata, ifsta, WLAN_REASON_UNSPECIFIED); |
3204 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
3205 | } |
3206 | } | |
3207 | ||
3208 | ||
f698d856 | 3209 | static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3210 | struct ieee80211_if_sta *ifsta) |
3211 | { | |
f698d856 | 3212 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3213 | |
3214 | if (local->ops->reset_tsf) { | |
3215 | /* Reset own TSF to allow time synchronization work. */ | |
3216 | local->ops->reset_tsf(local_to_hw(local)); | |
3217 | } | |
3218 | ||
3219 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
3220 | ||
3221 | ||
3222 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
3223 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
3224 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
3225 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
3226 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
3227 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
3228 | else | |
3229 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
f0706e82 | 3230 | ifsta->auth_transaction = -1; |
d6f2da5b | 3231 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
6042a3e3 | 3232 | ifsta->assoc_scan_tries = 0; |
9859b81e | 3233 | ifsta->direct_probe_tries = 0; |
6042a3e3 RR |
3234 | ifsta->auth_tries = 0; |
3235 | ifsta->assoc_tries = 0; | |
f698d856 | 3236 | netif_carrier_off(sdata->dev); |
f0706e82 JB |
3237 | } |
3238 | ||
3239 | ||
f698d856 | 3240 | void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3241 | struct ieee80211_if_sta *ifsta) |
3242 | { | |
f698d856 | 3243 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3244 | |
51fb61e7 | 3245 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3246 | return; |
3247 | ||
d6f2da5b JS |
3248 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
3249 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
3250 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
3251 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
3252 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3253 | queue_work(local->hw.workqueue, &ifsta->work); | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
3258 | const char *ssid, int ssid_len) | |
3259 | { | |
3260 | int tmp, hidden_ssid; | |
3261 | ||
48225709 MW |
3262 | if (ssid_len == ifsta->ssid_len && |
3263 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
3264 | return 1; |
3265 | ||
d6f2da5b | 3266 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
3267 | return 0; |
3268 | ||
3269 | hidden_ssid = 1; | |
3270 | tmp = ssid_len; | |
3271 | while (tmp--) { | |
3272 | if (ssid[tmp] != '\0') { | |
3273 | hidden_ssid = 0; | |
3274 | break; | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
3279 | return 1; | |
3280 | ||
3281 | if (ssid_len == 1 && ssid[0] == ' ') | |
3282 | return 1; | |
3283 | ||
3284 | return 0; | |
3285 | } | |
3286 | ||
f698d856 | 3287 | static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3288 | struct ieee80211_if_sta *ifsta) |
3289 | { | |
f698d856 | 3290 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3291 | struct ieee80211_sta_bss *bss, *selected = NULL; |
3292 | int top_rssi = 0, freq; | |
3293 | ||
f0706e82 | 3294 | spin_lock_bh(&local->sta_bss_lock); |
8318d78a | 3295 | freq = local->oper_channel->center_freq; |
f0706e82 JB |
3296 | list_for_each_entry(bss, &local->sta_bss_list, list) { |
3297 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
3298 | continue; | |
3299 | ||
34a961f7 AK |
3300 | if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
3301 | IEEE80211_STA_AUTO_BSSID_SEL | | |
3302 | IEEE80211_STA_AUTO_CHANNEL_SEL)) && | |
3303 | (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
3304 | !!sdata->default_key)) | |
f0706e82 JB |
3305 | continue; |
3306 | ||
d6f2da5b JS |
3307 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
3308 | bss->freq != freq) | |
f0706e82 JB |
3309 | continue; |
3310 | ||
d6f2da5b | 3311 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
3312 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
3313 | continue; | |
3314 | ||
d6f2da5b | 3315 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
3316 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
3317 | continue; | |
3318 | ||
566bfe5a | 3319 | if (!selected || top_rssi < bss->signal) { |
f0706e82 | 3320 | selected = bss; |
566bfe5a | 3321 | top_rssi = bss->signal; |
f0706e82 JB |
3322 | } |
3323 | } | |
3324 | if (selected) | |
3325 | atomic_inc(&selected->users); | |
3326 | spin_unlock_bh(&local->sta_bss_lock); | |
3327 | ||
3328 | if (selected) { | |
f698d856 | 3329 | ieee80211_set_freq(sdata, selected->freq); |
d6f2da5b | 3330 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f698d856 | 3331 | ieee80211_sta_set_ssid(sdata, selected->ssid, |
f0706e82 | 3332 | selected->ssid_len); |
f698d856 JBG |
3333 | ieee80211_sta_set_bssid(sdata, selected->bssid); |
3334 | ieee80211_sta_def_wmm_params(sdata, selected, 0); | |
9859b81e RR |
3335 | |
3336 | /* Send out direct probe if no probe resp was received or | |
3337 | * the one we have is outdated | |
3338 | */ | |
3339 | if (!selected->last_probe_resp || | |
3340 | time_after(jiffies, selected->last_probe_resp | |
3341 | + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3342 | ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE; | |
3343 | else | |
3344 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; | |
3345 | ||
3e122be0 | 3346 | ieee80211_rx_bss_put(local, selected); |
f698d856 | 3347 | ieee80211_sta_reset_auth(sdata, ifsta); |
f0706e82 JB |
3348 | return 0; |
3349 | } else { | |
6042a3e3 RR |
3350 | if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) { |
3351 | ifsta->assoc_scan_tries++; | |
d6f2da5b | 3352 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
f698d856 | 3353 | ieee80211_sta_start_scan(sdata, NULL, 0); |
b9bf1e60 | 3354 | else |
f698d856 | 3355 | ieee80211_sta_start_scan(sdata, ifsta->ssid, |
b9bf1e60 | 3356 | ifsta->ssid_len); |
48c2fc59 | 3357 | ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE; |
f0706e82 JB |
3358 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
3359 | } else | |
48c2fc59 | 3360 | ifsta->state = IEEE80211_STA_MLME_DISABLED; |
f0706e82 | 3361 | } |
f0706e82 JB |
3362 | return -1; |
3363 | } | |
3364 | ||
f0706e82 | 3365 | |
f698d856 | 3366 | static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3367 | struct ieee80211_if_sta *ifsta) |
3368 | { | |
f698d856 | 3369 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3370 | struct ieee80211_sta_bss *bss; |
8318d78a | 3371 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3372 | u8 bssid[ETH_ALEN], *pos; |
3373 | int i; | |
167ad6f7 | 3374 | int ret; |
0795af57 | 3375 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3376 | |
3377 | #if 0 | |
3378 | /* Easier testing, use fixed BSSID. */ | |
3379 | memset(bssid, 0xfe, ETH_ALEN); | |
3380 | #else | |
3381 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
3382 | * own MAC address to make sure that devices that do not have proper | |
3383 | * random number generator get different BSSID. */ | |
3384 | get_random_bytes(bssid, ETH_ALEN); | |
3385 | for (i = 0; i < ETH_ALEN; i++) | |
f698d856 | 3386 | bssid[i] ^= sdata->dev->dev_addr[i]; |
f0706e82 JB |
3387 | bssid[0] &= ~0x01; |
3388 | bssid[0] |= 0x02; | |
3389 | #endif | |
3390 | ||
0795af57 | 3391 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
f698d856 | 3392 | sdata->dev->name, print_mac(mac, bssid)); |
f0706e82 | 3393 | |
f698d856 | 3394 | bss = ieee80211_rx_bss_add(sdata, bssid, |
8318d78a | 3395 | local->hw.conf.channel->center_freq, |
cffdd30d | 3396 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); |
f0706e82 JB |
3397 | if (!bss) |
3398 | return -ENOMEM; | |
3399 | ||
8318d78a JB |
3400 | bss->band = local->hw.conf.channel->band; |
3401 | sband = local->hw.wiphy->bands[bss->band]; | |
f0706e82 JB |
3402 | |
3403 | if (local->hw.conf.beacon_int == 0) | |
dc0ae30c | 3404 | local->hw.conf.beacon_int = 100; |
f0706e82 | 3405 | bss->beacon_int = local->hw.conf.beacon_int; |
f0706e82 JB |
3406 | bss->last_update = jiffies; |
3407 | bss->capability = WLAN_CAPABILITY_IBSS; | |
988c0f72 JB |
3408 | |
3409 | if (sdata->default_key) | |
f0706e82 | 3410 | bss->capability |= WLAN_CAPABILITY_PRIVACY; |
988c0f72 | 3411 | else |
f0706e82 | 3412 | sdata->drop_unencrypted = 0; |
988c0f72 | 3413 | |
8318d78a | 3414 | bss->supp_rates_len = sband->n_bitrates; |
f0706e82 | 3415 | pos = bss->supp_rates; |
8318d78a JB |
3416 | for (i = 0; i < sband->n_bitrates; i++) { |
3417 | int rate = sband->bitrates[i].bitrate; | |
f0706e82 JB |
3418 | *pos++ = (u8) (rate / 5); |
3419 | } | |
3420 | ||
f698d856 | 3421 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); |
3e122be0 | 3422 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3423 | return ret; |
f0706e82 JB |
3424 | } |
3425 | ||
3426 | ||
f698d856 | 3427 | static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
3428 | struct ieee80211_if_sta *ifsta) |
3429 | { | |
f698d856 | 3430 | struct ieee80211_local *local = sdata->local; |
f0706e82 JB |
3431 | struct ieee80211_sta_bss *bss; |
3432 | int found = 0; | |
3433 | u8 bssid[ETH_ALEN]; | |
3434 | int active_ibss; | |
0795af57 JP |
3435 | DECLARE_MAC_BUF(mac); |
3436 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
3437 | |
3438 | if (ifsta->ssid_len == 0) | |
3439 | return -EINVAL; | |
3440 | ||
f698d856 | 3441 | active_ibss = ieee80211_sta_active_ibss(sdata); |
f0706e82 JB |
3442 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3443 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
f698d856 | 3444 | sdata->dev->name, active_ibss); |
f0706e82 JB |
3445 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3446 | spin_lock_bh(&local->sta_bss_lock); | |
3447 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3448 | if (ifsta->ssid_len != bss->ssid_len || | |
3449 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
3450 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
3451 | continue; | |
3452 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
3453 | printk(KERN_DEBUG " bssid=%s found\n", |
3454 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
3455 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
3456 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
3457 | found = 1; | |
3458 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
3459 | break; | |
3460 | } | |
3461 | spin_unlock_bh(&local->sta_bss_lock); | |
3462 | ||
3463 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
6e43829b VK |
3464 | if (found) |
3465 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " | |
3466 | "%s\n", print_mac(mac, bssid), | |
3467 | print_mac(mac2, ifsta->bssid)); | |
f0706e82 | 3468 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
80693ceb DD |
3469 | |
3470 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
167ad6f7 | 3471 | int ret; |
80693ceb DD |
3472 | int search_freq; |
3473 | ||
3474 | if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) | |
3475 | search_freq = bss->freq; | |
3476 | else | |
3477 | search_freq = local->hw.conf.channel->center_freq; | |
3478 | ||
f698d856 | 3479 | bss = ieee80211_rx_bss_get(local, bssid, search_freq, |
80693ceb DD |
3480 | ifsta->ssid, ifsta->ssid_len); |
3481 | if (!bss) | |
3482 | goto dont_join; | |
3483 | ||
0795af57 | 3484 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 3485 | " based on configured SSID\n", |
f698d856 JBG |
3486 | sdata->dev->name, print_mac(mac, bssid)); |
3487 | ret = ieee80211_sta_join_ibss(sdata, ifsta, bss); | |
3e122be0 | 3488 | ieee80211_rx_bss_put(local, bss); |
167ad6f7 | 3489 | return ret; |
f0706e82 | 3490 | } |
80693ceb DD |
3491 | |
3492 | dont_join: | |
f0706e82 JB |
3493 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
3494 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
3495 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
3496 | ||
3497 | /* Selected IBSS not found in current scan results - try to scan */ | |
48c2fc59 | 3498 | if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED && |
f698d856 | 3499 | !ieee80211_sta_active_ibss(sdata)) { |
f0706e82 JB |
3500 | mod_timer(&ifsta->timer, jiffies + |
3501 | IEEE80211_IBSS_MERGE_INTERVAL); | |
3502 | } else if (time_after(jiffies, local->last_scan_completed + | |
3503 | IEEE80211_SCAN_INTERVAL)) { | |
3504 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
f698d856 JBG |
3505 | "join\n", sdata->dev->name); |
3506 | return ieee80211_sta_req_scan(sdata, ifsta->ssid, | |
f0706e82 | 3507 | ifsta->ssid_len); |
48c2fc59 | 3508 | } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) { |
f0706e82 JB |
3509 | int interval = IEEE80211_SCAN_INTERVAL; |
3510 | ||
3511 | if (time_after(jiffies, ifsta->ibss_join_req + | |
3512 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 3513 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
8318d78a JB |
3514 | (!(local->oper_channel->flags & |
3515 | IEEE80211_CHAN_NO_IBSS))) | |
f698d856 | 3516 | return ieee80211_sta_create_ibss(sdata, ifsta); |
d6f2da5b | 3517 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
8318d78a | 3518 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
f698d856 | 3519 | " %d MHz\n", sdata->dev->name, |
8318d78a | 3520 | local->hw.conf.channel->center_freq); |
f0706e82 JB |
3521 | } |
3522 | ||
3523 | /* No IBSS found - decrease scan interval and continue | |
3524 | * scanning. */ | |
3525 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
3526 | } | |
3527 | ||
48c2fc59 | 3528 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f0706e82 JB |
3529 | mod_timer(&ifsta->timer, jiffies + interval); |
3530 | return 0; | |
3531 | } | |
3532 | ||
3533 | return 0; | |
3534 | } | |
3535 | ||
3536 | ||
f698d856 | 3537 | int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len) |
f0706e82 | 3538 | { |
f0706e82 | 3539 | struct ieee80211_if_sta *ifsta; |
9d139c81 | 3540 | int res; |
f0706e82 JB |
3541 | |
3542 | if (len > IEEE80211_MAX_SSID_LEN) | |
3543 | return -EINVAL; | |
3544 | ||
f0706e82 JB |
3545 | ifsta = &sdata->u.sta; |
3546 | ||
9d139c81 JB |
3547 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) { |
3548 | memset(ifsta->ssid, 0, sizeof(ifsta->ssid)); | |
3549 | memcpy(ifsta->ssid, ssid, len); | |
3550 | ifsta->ssid_len = len; | |
d6f2da5b | 3551 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
9d139c81 JB |
3552 | |
3553 | res = 0; | |
3554 | /* | |
3555 | * Hack! MLME code needs to be cleaned up to have different | |
3556 | * entry points for configuration and internal selection change | |
3557 | */ | |
3558 | if (netif_running(sdata->dev)) | |
3559 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID); | |
3560 | if (res) { | |
3561 | printk(KERN_DEBUG "%s: Failed to config new SSID to " | |
f698d856 | 3562 | "the low-level driver\n", sdata->dev->name); |
9d139c81 JB |
3563 | return res; |
3564 | } | |
3565 | } | |
f0706e82 | 3566 | |
d6f2da5b JS |
3567 | if (len) |
3568 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3569 | else | |
3570 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
9d139c81 | 3571 | |
51fb61e7 | 3572 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3573 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 | 3574 | ifsta->ibss_join_req = jiffies; |
48c2fc59 | 3575 | ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH; |
f698d856 | 3576 | return ieee80211_sta_find_ibss(sdata, ifsta); |
f0706e82 | 3577 | } |
9d139c81 | 3578 | |
f0706e82 JB |
3579 | return 0; |
3580 | } | |
3581 | ||
3582 | ||
f698d856 | 3583 | int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len) |
f0706e82 | 3584 | { |
f0706e82 JB |
3585 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
3586 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3587 | *len = ifsta->ssid_len; | |
3588 | return 0; | |
3589 | } | |
3590 | ||
3591 | ||
f698d856 | 3592 | int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid) |
f0706e82 | 3593 | { |
f0706e82 JB |
3594 | struct ieee80211_if_sta *ifsta; |
3595 | int res; | |
3596 | ||
f0706e82 JB |
3597 | ifsta = &sdata->u.sta; |
3598 | ||
3599 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3600 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
9d139c81 JB |
3601 | res = 0; |
3602 | /* | |
3603 | * Hack! See also ieee80211_sta_set_ssid. | |
3604 | */ | |
3605 | if (netif_running(sdata->dev)) | |
3606 | res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID); | |
f0706e82 JB |
3607 | if (res) { |
3608 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
f698d856 | 3609 | "the low-level driver\n", sdata->dev->name); |
f0706e82 JB |
3610 | return res; |
3611 | } | |
3612 | } | |
3613 | ||
d6f2da5b JS |
3614 | if (is_valid_ether_addr(bssid)) |
3615 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3616 | else |
d6f2da5b JS |
3617 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3618 | ||
f0706e82 JB |
3619 | return 0; |
3620 | } | |
3621 | ||
3622 | ||
3623 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3624 | struct ieee80211_sub_if_data *sdata, | |
3625 | int powersave) | |
3626 | { | |
3627 | struct sk_buff *skb; | |
3628 | struct ieee80211_hdr *nullfunc; | |
4e3996fe | 3629 | __le16 fc; |
f0706e82 JB |
3630 | |
3631 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3632 | if (!skb) { | |
3633 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3634 | "frame\n", sdata->dev->name); | |
3635 | return; | |
3636 | } | |
3637 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3638 | ||
3639 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3640 | memset(nullfunc, 0, 24); | |
4e3996fe HH |
3641 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | |
3642 | IEEE80211_FCTL_TODS); | |
f0706e82 | 3643 | if (powersave) |
4e3996fe HH |
3644 | fc |= cpu_to_le16(IEEE80211_FCTL_PM); |
3645 | nullfunc->frame_control = fc; | |
f0706e82 JB |
3646 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); |
3647 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3648 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3649 | ||
f698d856 | 3650 | ieee80211_sta_tx(sdata, skb, 0); |
f0706e82 JB |
3651 | } |
3652 | ||
3653 | ||
69d3b6f4 JB |
3654 | static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) |
3655 | { | |
3656 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
3657 | ieee80211_vif_is_mesh(&sdata->vif)) | |
3658 | ieee80211_sta_timer((unsigned long)sdata); | |
3659 | } | |
3660 | ||
f0706e82 JB |
3661 | void ieee80211_scan_completed(struct ieee80211_hw *hw) |
3662 | { | |
3663 | struct ieee80211_local *local = hw_to_local(hw); | |
3664 | struct net_device *dev = local->scan_dev; | |
3665 | struct ieee80211_sub_if_data *sdata; | |
3666 | union iwreq_data wrqu; | |
3667 | ||
3668 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3669 | memset(&wrqu, 0, sizeof(wrqu)); |
3670 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3671 | |
ece8eddd ZY |
3672 | if (local->sta_hw_scanning) { |
3673 | local->sta_hw_scanning = 0; | |
675ef586 MA |
3674 | if (ieee80211_hw_config(local)) |
3675 | printk(KERN_DEBUG "%s: failed to restore operational " | |
3676 | "channel after scan\n", dev->name); | |
69d3b6f4 JB |
3677 | /* Restart STA timer for HW scan case */ |
3678 | rcu_read_lock(); | |
3679 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
3680 | ieee80211_restart_sta_timer(sdata); | |
3681 | rcu_read_unlock(); | |
3682 | ||
ece8eddd ZY |
3683 | goto done; |
3684 | } | |
3685 | ||
3686 | local->sta_sw_scanning = 0; | |
f0706e82 | 3687 | if (ieee80211_hw_config(local)) |
4b50e388 | 3688 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3689 | "channel after scan\n", dev->name); |
3690 | ||
4150c572 JB |
3691 | |
3692 | netif_tx_lock_bh(local->mdev); | |
e308a5d8 | 3693 | netif_addr_lock(local->mdev); |
4150c572 JB |
3694 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; |
3695 | local->ops->configure_filter(local_to_hw(local), | |
3696 | FIF_BCN_PRBRESP_PROMISC, | |
3697 | &local->filter_flags, | |
3698 | local->mdev->mc_count, | |
3699 | local->mdev->mc_list); | |
3700 | ||
e308a5d8 | 3701 | netif_addr_unlock(local->mdev); |
4150c572 | 3702 | netif_tx_unlock_bh(local->mdev); |
f0706e82 | 3703 | |
79010420 JB |
3704 | rcu_read_lock(); |
3705 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
69d3b6f4 JB |
3706 | /* Tell AP we're back */ |
3707 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && | |
3708 | sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) | |
3709 | ieee80211_send_nullfunc(local, sdata, 0); | |
14042cbe | 3710 | |
69d3b6f4 | 3711 | ieee80211_restart_sta_timer(sdata); |
f709fc69 | 3712 | |
f0706e82 JB |
3713 | netif_wake_queue(sdata->dev); |
3714 | } | |
79010420 | 3715 | rcu_read_unlock(); |
f0706e82 | 3716 | |
ece8eddd | 3717 | done: |
f0706e82 | 3718 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3719 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3720 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3721 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
48c2fc59 | 3722 | (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) && |
f698d856 JBG |
3723 | !ieee80211_sta_active_ibss(sdata))) |
3724 | ieee80211_sta_find_ibss(sdata, ifsta); | |
f0706e82 JB |
3725 | } |
3726 | } | |
3727 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3728 | ||
3729 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3730 | { | |
3731 | struct ieee80211_local *local = | |
3732 | container_of(work, struct ieee80211_local, scan_work.work); | |
3733 | struct net_device *dev = local->scan_dev; | |
3734 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
8318d78a | 3735 | struct ieee80211_supported_band *sband; |
f0706e82 JB |
3736 | struct ieee80211_channel *chan; |
3737 | int skip; | |
3738 | unsigned long next_delay = 0; | |
3739 | ||
ece8eddd | 3740 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3741 | return; |
3742 | ||
3743 | switch (local->scan_state) { | |
3744 | case SCAN_SET_CHANNEL: | |
69d464d5 JB |
3745 | /* |
3746 | * Get current scan band. scan_band may be IEEE80211_NUM_BANDS | |
3747 | * after we successfully scanned the last channel of the last | |
3748 | * band (and the last band is supported by the hw) | |
3749 | */ | |
8318d78a JB |
3750 | if (local->scan_band < IEEE80211_NUM_BANDS) |
3751 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3752 | else | |
3753 | sband = NULL; | |
3754 | ||
69d464d5 JB |
3755 | /* |
3756 | * If we are at an unsupported band and have more bands | |
3757 | * left to scan, advance to the next supported one. | |
3758 | */ | |
3759 | while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) { | |
8318d78a JB |
3760 | local->scan_band++; |
3761 | sband = local->hw.wiphy->bands[local->scan_band]; | |
3762 | local->scan_channel_idx = 0; | |
3763 | } | |
3764 | ||
69d464d5 JB |
3765 | /* if no more bands/channels left, complete scan */ |
3766 | if (!sband || local->scan_channel_idx >= sband->n_channels) { | |
f0706e82 JB |
3767 | ieee80211_scan_completed(local_to_hw(local)); |
3768 | return; | |
3769 | } | |
8318d78a JB |
3770 | skip = 0; |
3771 | chan = &sband->channels[local->scan_channel_idx]; | |
3772 | ||
3773 | if (chan->flags & IEEE80211_CHAN_DISABLED || | |
51fb61e7 | 3774 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
8318d78a | 3775 | chan->flags & IEEE80211_CHAN_NO_IBSS)) |
f0706e82 JB |
3776 | skip = 1; |
3777 | ||
3778 | if (!skip) { | |
f0706e82 JB |
3779 | local->scan_channel = chan; |
3780 | if (ieee80211_hw_config(local)) { | |
8318d78a JB |
3781 | printk(KERN_DEBUG "%s: failed to set freq to " |
3782 | "%d MHz for scan\n", dev->name, | |
3783 | chan->center_freq); | |
f0706e82 JB |
3784 | skip = 1; |
3785 | } | |
3786 | } | |
3787 | ||
69d464d5 | 3788 | /* advance state machine to next channel/band */ |
f0706e82 | 3789 | local->scan_channel_idx++; |
8318d78a | 3790 | if (local->scan_channel_idx >= sband->n_channels) { |
69d464d5 JB |
3791 | /* |
3792 | * scan_band may end up == IEEE80211_NUM_BANDS, but | |
3793 | * we'll catch that case above and complete the scan | |
3794 | * if that is the case. | |
3795 | */ | |
8318d78a JB |
3796 | local->scan_band++; |
3797 | local->scan_channel_idx = 0; | |
f0706e82 JB |
3798 | } |
3799 | ||
3800 | if (skip) | |
3801 | break; | |
3802 | ||
3803 | next_delay = IEEE80211_PROBE_DELAY + | |
3804 | usecs_to_jiffies(local->hw.channel_change_time); | |
3805 | local->scan_state = SCAN_SEND_PROBE; | |
3806 | break; | |
3807 | case SCAN_SEND_PROBE: | |
8318d78a | 3808 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; |
f0706e82 | 3809 | local->scan_state = SCAN_SET_CHANNEL; |
8318d78a JB |
3810 | |
3811 | if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN) | |
3812 | break; | |
f698d856 | 3813 | ieee80211_send_probe_req(sdata, NULL, local->scan_ssid, |
8318d78a JB |
3814 | local->scan_ssid_len); |
3815 | next_delay = IEEE80211_CHANNEL_TIME; | |
f0706e82 JB |
3816 | break; |
3817 | } | |
3818 | ||
ece8eddd | 3819 | if (local->sta_sw_scanning) |
f0706e82 JB |
3820 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3821 | next_delay); | |
3822 | } | |
3823 | ||
3824 | ||
f698d856 | 3825 | static int ieee80211_sta_start_scan(struct ieee80211_sub_if_data *scan_sdata, |
f0706e82 JB |
3826 | u8 *ssid, size_t ssid_len) |
3827 | { | |
f698d856 | 3828 | struct ieee80211_local *local = scan_sdata->local; |
f0706e82 JB |
3829 | struct ieee80211_sub_if_data *sdata; |
3830 | ||
3831 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3832 | return -EINVAL; | |
3833 | ||
3834 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3835 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3836 | * BSSID: MACAddress | |
3837 | * SSID | |
3838 | * ScanType: ACTIVE, PASSIVE | |
3839 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3840 | * a Probe frame during active scanning | |
3841 | * ChannelList | |
3842 | * MinChannelTime (>= ProbeDelay), in TU | |
3843 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3844 | */ | |
3845 | ||
3846 | /* MLME-SCAN.confirm | |
3847 | * BSSDescriptionSet | |
3848 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3849 | */ | |
3850 | ||
ece8eddd | 3851 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 3852 | if (local->scan_dev == scan_sdata->dev) |
f0706e82 JB |
3853 | return 0; |
3854 | return -EBUSY; | |
3855 | } | |
3856 | ||
3857 | if (local->ops->hw_scan) { | |
3858 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3859 | ssid, ssid_len); |
f0706e82 | 3860 | if (!rc) { |
ece8eddd | 3861 | local->sta_hw_scanning = 1; |
f698d856 | 3862 | local->scan_dev = scan_sdata->dev; |
f0706e82 JB |
3863 | } |
3864 | return rc; | |
3865 | } | |
3866 | ||
ece8eddd | 3867 | local->sta_sw_scanning = 1; |
f0706e82 | 3868 | |
79010420 JB |
3869 | rcu_read_lock(); |
3870 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
f0706e82 | 3871 | netif_stop_queue(sdata->dev); |
51fb61e7 | 3872 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 3873 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3874 | ieee80211_send_nullfunc(local, sdata, 1); |
3875 | } | |
79010420 | 3876 | rcu_read_unlock(); |
f0706e82 JB |
3877 | |
3878 | if (ssid) { | |
3879 | local->scan_ssid_len = ssid_len; | |
3880 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3881 | } else | |
3882 | local->scan_ssid_len = 0; | |
3883 | local->scan_state = SCAN_SET_CHANNEL; | |
f0706e82 | 3884 | local->scan_channel_idx = 0; |
8318d78a | 3885 | local->scan_band = IEEE80211_BAND_2GHZ; |
f698d856 | 3886 | local->scan_dev = scan_sdata->dev; |
f0706e82 | 3887 | |
b9e40857 | 3888 | netif_addr_lock_bh(local->mdev); |
4150c572 JB |
3889 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; |
3890 | local->ops->configure_filter(local_to_hw(local), | |
3891 | FIF_BCN_PRBRESP_PROMISC, | |
3892 | &local->filter_flags, | |
3893 | local->mdev->mc_count, | |
3894 | local->mdev->mc_list); | |
b9e40857 | 3895 | netif_addr_unlock_bh(local->mdev); |
f0706e82 JB |
3896 | |
3897 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
3898 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
3899 | IEEE80211_CHANNEL_TIME); | |
3900 | ||
3901 | return 0; | |
3902 | } | |
3903 | ||
3904 | ||
f698d856 | 3905 | int ieee80211_sta_req_scan(struct ieee80211_sub_if_data *sdata, u8 *ssid, size_t ssid_len) |
f0706e82 | 3906 | { |
f0706e82 | 3907 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
f698d856 | 3908 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 3909 | |
51fb61e7 | 3910 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f698d856 | 3911 | return ieee80211_sta_start_scan(sdata, ssid, ssid_len); |
f0706e82 | 3912 | |
ece8eddd | 3913 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f698d856 | 3914 | if (local->scan_dev == sdata->dev) |
f0706e82 JB |
3915 | return 0; |
3916 | return -EBUSY; | |
3917 | } | |
3918 | ||
a0af5f14 HS |
3919 | ifsta->scan_ssid_len = ssid_len; |
3920 | if (ssid_len) | |
3921 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
3922 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
3923 | queue_work(local->hw.workqueue, &ifsta->work); | |
3924 | return 0; | |
3925 | } | |
3926 | ||
43ac2ca3 JM |
3927 | |
3928 | static void ieee80211_sta_add_scan_ies(struct iw_request_info *info, | |
3929 | struct ieee80211_sta_bss *bss, | |
3930 | char **current_ev, char *end_buf) | |
3931 | { | |
3932 | u8 *pos, *end, *next; | |
3933 | struct iw_event iwe; | |
3934 | ||
3935 | if (bss == NULL || bss->ies == NULL) | |
3936 | return; | |
3937 | ||
3938 | /* | |
3939 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
3940 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
3941 | */ | |
3942 | pos = bss->ies; | |
3943 | end = pos + bss->ies_len; | |
3944 | ||
3945 | while (end - pos > IW_GENERIC_IE_MAX) { | |
3946 | next = pos + 2 + pos[1]; | |
3947 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
3948 | next = next + 2 + next[1]; | |
3949 | ||
3950 | memset(&iwe, 0, sizeof(iwe)); | |
3951 | iwe.cmd = IWEVGENIE; | |
3952 | iwe.u.data.length = next - pos; | |
3953 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
3954 | end_buf, &iwe, pos); | |
3955 | ||
3956 | pos = next; | |
3957 | } | |
3958 | ||
3959 | if (end > pos) { | |
3960 | memset(&iwe, 0, sizeof(iwe)); | |
3961 | iwe.cmd = IWEVGENIE; | |
3962 | iwe.u.data.length = end - pos; | |
3963 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
3964 | end_buf, &iwe, pos); | |
3965 | } | |
3966 | } | |
3967 | ||
3968 | ||
f0706e82 | 3969 | static char * |
f698d856 | 3970 | ieee80211_sta_scan_result(struct ieee80211_local *local, |
ccc58057 | 3971 | struct iw_request_info *info, |
f0706e82 JB |
3972 | struct ieee80211_sta_bss *bss, |
3973 | char *current_ev, char *end_buf) | |
3974 | { | |
f0706e82 JB |
3975 | struct iw_event iwe; |
3976 | ||
3977 | if (time_after(jiffies, | |
3978 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3979 | return current_ev; | |
3980 | ||
f0706e82 JB |
3981 | memset(&iwe, 0, sizeof(iwe)); |
3982 | iwe.cmd = SIOCGIWAP; | |
3983 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
3984 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
ccc58057 | 3985 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
3986 | IW_EV_ADDR_LEN); |
3987 | ||
3988 | memset(&iwe, 0, sizeof(iwe)); | |
3989 | iwe.cmd = SIOCGIWESSID; | |
902acc78 JB |
3990 | if (bss_mesh_cfg(bss)) { |
3991 | iwe.u.data.length = bss_mesh_id_len(bss); | |
f709fc69 | 3992 | iwe.u.data.flags = 1; |
ccc58057 DM |
3993 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
3994 | &iwe, bss_mesh_id(bss)); | |
f709fc69 LCC |
3995 | } else { |
3996 | iwe.u.data.length = bss->ssid_len; | |
3997 | iwe.u.data.flags = 1; | |
ccc58057 DM |
3998 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
3999 | &iwe, bss->ssid); | |
f709fc69 | 4000 | } |
f0706e82 | 4001 | |
1d1b5359 LCC |
4002 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) |
4003 | || bss_mesh_cfg(bss)) { | |
f0706e82 JB |
4004 | memset(&iwe, 0, sizeof(iwe)); |
4005 | iwe.cmd = SIOCGIWMODE; | |
902acc78 | 4006 | if (bss_mesh_cfg(bss)) |
f709fc69 LCC |
4007 | iwe.u.mode = IW_MODE_MESH; |
4008 | else if (bss->capability & WLAN_CAPABILITY_ESS) | |
f0706e82 JB |
4009 | iwe.u.mode = IW_MODE_MASTER; |
4010 | else | |
4011 | iwe.u.mode = IW_MODE_ADHOC; | |
ccc58057 DM |
4012 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
4013 | &iwe, IW_EV_UINT_LEN); | |
f0706e82 JB |
4014 | } |
4015 | ||
4016 | memset(&iwe, 0, sizeof(iwe)); | |
4017 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4018 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq); |
4019 | iwe.u.freq.e = 0; | |
ccc58057 | 4020 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4021 | IW_EV_FREQ_LEN); |
8318d78a JB |
4022 | |
4023 | memset(&iwe, 0, sizeof(iwe)); | |
4024 | iwe.cmd = SIOCGIWFREQ; | |
9381be05 TW |
4025 | iwe.u.freq.m = bss->freq; |
4026 | iwe.u.freq.e = 6; | |
ccc58057 | 4027 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 | 4028 | IW_EV_FREQ_LEN); |
f0706e82 JB |
4029 | memset(&iwe, 0, sizeof(iwe)); |
4030 | iwe.cmd = IWEVQUAL; | |
566bfe5a BR |
4031 | iwe.u.qual.qual = bss->qual; |
4032 | iwe.u.qual.level = bss->signal; | |
f0706e82 JB |
4033 | iwe.u.qual.noise = bss->noise; |
4034 | iwe.u.qual.updated = local->wstats_flags; | |
ccc58057 | 4035 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
f0706e82 JB |
4036 | IW_EV_QUAL_LEN); |
4037 | ||
4038 | memset(&iwe, 0, sizeof(iwe)); | |
4039 | iwe.cmd = SIOCGIWENCODE; | |
4040 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
4041 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
4042 | else | |
4043 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
4044 | iwe.u.data.length = 0; | |
ccc58057 DM |
4045 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
4046 | &iwe, ""); | |
f0706e82 | 4047 | |
43ac2ca3 | 4048 | ieee80211_sta_add_scan_ies(info, bss, ¤t_ev, end_buf); |
e623157b | 4049 | |
f0706e82 JB |
4050 | if (bss && bss->supp_rates_len > 0) { |
4051 | /* display all supported rates in readable format */ | |
ccc58057 | 4052 | char *p = current_ev + iwe_stream_lcp_len(info); |
f0706e82 JB |
4053 | int i; |
4054 | ||
4055 | memset(&iwe, 0, sizeof(iwe)); | |
4056 | iwe.cmd = SIOCGIWRATE; | |
4057 | /* Those two flags are ignored... */ | |
4058 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
4059 | ||
4060 | for (i = 0; i < bss->supp_rates_len; i++) { | |
4061 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
4062 | 0x7f) * 500000); | |
ccc58057 | 4063 | p = iwe_stream_add_value(info, current_ev, p, |
f0706e82 JB |
4064 | end_buf, &iwe, IW_EV_PARAM_LEN); |
4065 | } | |
4066 | current_ev = p; | |
4067 | } | |
4068 | ||
4069 | if (bss) { | |
4070 | char *buf; | |
4071 | buf = kmalloc(30, GFP_ATOMIC); | |
4072 | if (buf) { | |
4073 | memset(&iwe, 0, sizeof(iwe)); | |
4074 | iwe.cmd = IWEVCUSTOM; | |
4075 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
4076 | iwe.u.data.length = strlen(buf); | |
ccc58057 DM |
4077 | current_ev = iwe_stream_add_point(info, current_ev, |
4078 | end_buf, | |
f0706e82 | 4079 | &iwe, buf); |
bf998f68 EG |
4080 | memset(&iwe, 0, sizeof(iwe)); |
4081 | iwe.cmd = IWEVCUSTOM; | |
4082 | sprintf(buf, " Last beacon: %dms ago", | |
4083 | jiffies_to_msecs(jiffies - bss->last_update)); | |
4084 | iwe.u.data.length = strlen(buf); | |
4085 | current_ev = iwe_stream_add_point(info, current_ev, | |
4086 | end_buf, &iwe, buf); | |
f0706e82 JB |
4087 | kfree(buf); |
4088 | } | |
4089 | } | |
4090 | ||
902acc78 | 4091 | if (bss_mesh_cfg(bss)) { |
f709fc69 | 4092 | char *buf; |
24736701 | 4093 | u8 *cfg = bss_mesh_cfg(bss); |
4f5d4c4d | 4094 | buf = kmalloc(50, GFP_ATOMIC); |
f709fc69 LCC |
4095 | if (buf) { |
4096 | memset(&iwe, 0, sizeof(iwe)); | |
4097 | iwe.cmd = IWEVCUSTOM; | |
24736701 | 4098 | sprintf(buf, "Mesh network (version %d)", cfg[0]); |
4f5d4c4d | 4099 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4100 | current_ev = iwe_stream_add_point(info, current_ev, |
4101 | end_buf, | |
4f5d4c4d LCC |
4102 | &iwe, buf); |
4103 | sprintf(buf, "Path Selection Protocol ID: " | |
24736701 JL |
4104 | "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3], |
4105 | cfg[4]); | |
4f5d4c4d | 4106 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4107 | current_ev = iwe_stream_add_point(info, current_ev, |
4108 | end_buf, | |
4f5d4c4d LCC |
4109 | &iwe, buf); |
4110 | sprintf(buf, "Path Selection Metric ID: " | |
24736701 JL |
4111 | "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7], |
4112 | cfg[8]); | |
4f5d4c4d | 4113 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4114 | current_ev = iwe_stream_add_point(info, current_ev, |
4115 | end_buf, | |
4f5d4c4d LCC |
4116 | &iwe, buf); |
4117 | sprintf(buf, "Congestion Control Mode ID: " | |
24736701 JL |
4118 | "0x%02X%02X%02X%02X", cfg[9], cfg[10], |
4119 | cfg[11], cfg[12]); | |
4f5d4c4d | 4120 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4121 | current_ev = iwe_stream_add_point(info, current_ev, |
4122 | end_buf, | |
4f5d4c4d LCC |
4123 | &iwe, buf); |
4124 | sprintf(buf, "Channel Precedence: " | |
24736701 JL |
4125 | "0x%02X%02X%02X%02X", cfg[13], cfg[14], |
4126 | cfg[15], cfg[16]); | |
f709fc69 | 4127 | iwe.u.data.length = strlen(buf); |
ccc58057 DM |
4128 | current_ev = iwe_stream_add_point(info, current_ev, |
4129 | end_buf, | |
f709fc69 LCC |
4130 | &iwe, buf); |
4131 | kfree(buf); | |
4132 | } | |
4133 | } | |
4134 | ||
f0706e82 JB |
4135 | return current_ev; |
4136 | } | |
4137 | ||
4138 | ||
f698d856 | 4139 | int ieee80211_sta_scan_results(struct ieee80211_local *local, |
ccc58057 DM |
4140 | struct iw_request_info *info, |
4141 | char *buf, size_t len) | |
f0706e82 | 4142 | { |
f0706e82 JB |
4143 | char *current_ev = buf; |
4144 | char *end_buf = buf + len; | |
4145 | struct ieee80211_sta_bss *bss; | |
4146 | ||
4147 | spin_lock_bh(&local->sta_bss_lock); | |
4148 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
4149 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
4150 | spin_unlock_bh(&local->sta_bss_lock); | |
4151 | return -E2BIG; | |
4152 | } | |
f698d856 | 4153 | current_ev = ieee80211_sta_scan_result(local, info, bss, |
ccc58057 | 4154 | current_ev, end_buf); |
f0706e82 JB |
4155 | } |
4156 | spin_unlock_bh(&local->sta_bss_lock); | |
4157 | return current_ev - buf; | |
4158 | } | |
4159 | ||
4160 | ||
f698d856 | 4161 | int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len) |
f0706e82 | 4162 | { |
f0706e82 | 4163 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
988c0f72 | 4164 | |
f0706e82 JB |
4165 | kfree(ifsta->extra_ie); |
4166 | if (len == 0) { | |
4167 | ifsta->extra_ie = NULL; | |
4168 | ifsta->extra_ie_len = 0; | |
4169 | return 0; | |
4170 | } | |
4171 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
4172 | if (!ifsta->extra_ie) { | |
4173 | ifsta->extra_ie_len = 0; | |
4174 | return -ENOMEM; | |
4175 | } | |
4176 | memcpy(ifsta->extra_ie, ie, len); | |
4177 | ifsta->extra_ie_len = len; | |
4178 | return 0; | |
4179 | } | |
4180 | ||
4181 | ||
f698d856 | 4182 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
988c0f72 | 4183 | struct sk_buff *skb, u8 *bssid, |
87291c02 | 4184 | u8 *addr, u64 supp_rates) |
f0706e82 | 4185 | { |
f698d856 | 4186 | struct ieee80211_local *local = sdata->local; |
f0706e82 | 4187 | struct sta_info *sta; |
0795af57 | 4188 | DECLARE_MAC_BUF(mac); |
87291c02 | 4189 | int band = local->hw.conf.channel->band; |
f0706e82 JB |
4190 | |
4191 | /* TODO: Could consider removing the least recently used entry and | |
4192 | * allow new one to be added. */ | |
4193 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
4194 | if (net_ratelimit()) { | |
4195 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
f698d856 | 4196 | "entry %s\n", sdata->dev->name, print_mac(mac, addr)); |
f0706e82 JB |
4197 | } |
4198 | return NULL; | |
4199 | } | |
4200 | ||
1e188637 | 4201 | if (compare_ether_addr(bssid, sdata->u.sta.bssid)) |
87291c02 VK |
4202 | return NULL; |
4203 | ||
f4ea83dd | 4204 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
0795af57 | 4205 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
f698d856 | 4206 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name); |
f4ea83dd | 4207 | #endif |
f0706e82 | 4208 | |
73651ee6 JB |
4209 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
4210 | if (!sta) | |
f0706e82 JB |
4211 | return NULL; |
4212 | ||
07346f81 | 4213 | set_sta_flags(sta, WLAN_STA_AUTHORIZED); |
238814fd | 4214 | |
8e1535d5 EG |
4215 | /* make sure mandatory rates are always added */ |
4216 | sta->supp_rates[band] = supp_rates | | |
4217 | ieee80211_sta_get_mandatory_rates(local, band); | |
f0706e82 JB |
4218 | |
4219 | rate_control_rate_init(sta, local); | |
4220 | ||
93e5deb1 | 4221 | if (sta_info_insert(sta)) |
73651ee6 | 4222 | return NULL; |
73651ee6 | 4223 | |
d0709a65 | 4224 | return sta; |
f0706e82 JB |
4225 | } |
4226 | ||
4227 | ||
f698d856 | 4228 | int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4229 | { |
f0706e82 JB |
4230 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4231 | ||
f4ea83dd | 4232 | printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n", |
f698d856 | 4233 | sdata->dev->name, reason); |
f0706e82 | 4234 | |
51fb61e7 JB |
4235 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
4236 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
4237 | return -EINVAL; |
4238 | ||
f698d856 JBG |
4239 | ieee80211_send_deauth(sdata, ifsta, reason); |
4240 | ieee80211_set_disassoc(sdata, ifsta, 1); | |
f0706e82 JB |
4241 | return 0; |
4242 | } | |
4243 | ||
4244 | ||
f698d856 | 4245 | int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason) |
f0706e82 | 4246 | { |
f0706e82 JB |
4247 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
4248 | ||
f4ea83dd | 4249 | printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n", |
f698d856 | 4250 | sdata->dev->name, reason); |
f0706e82 | 4251 | |
51fb61e7 | 4252 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
4253 | return -EINVAL; |
4254 | ||
d6f2da5b | 4255 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
4256 | return -1; |
4257 | ||
f698d856 JBG |
4258 | ieee80211_send_disassoc(sdata, ifsta, reason); |
4259 | ieee80211_set_disassoc(sdata, ifsta, 0); | |
f0706e82 JB |
4260 | return 0; |
4261 | } | |
84363e6e MA |
4262 | |
4263 | void ieee80211_notify_mac(struct ieee80211_hw *hw, | |
4264 | enum ieee80211_notification_types notif_type) | |
4265 | { | |
4266 | struct ieee80211_local *local = hw_to_local(hw); | |
4267 | struct ieee80211_sub_if_data *sdata; | |
4268 | ||
4269 | switch (notif_type) { | |
4270 | case IEEE80211_NOTIFY_RE_ASSOC: | |
4271 | rcu_read_lock(); | |
4272 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
3e122be0 JB |
4273 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
4274 | continue; | |
84363e6e | 4275 | |
f698d856 | 4276 | ieee80211_sta_req_auth(sdata, &sdata->u.sta); |
84363e6e MA |
4277 | } |
4278 | rcu_read_unlock(); | |
4279 | break; | |
4280 | } | |
4281 | } | |
4282 | EXPORT_SYMBOL(ieee80211_notify_mac); |