Commit | Line | Data |
---|---|---|
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> | |
f0706e82 JB |
27 | #include <net/iw_handler.h> |
28 | #include <asm/types.h> | |
f0706e82 JB |
29 | |
30 | #include <net/mac80211.h> | |
31 | #include "ieee80211_i.h" | |
32 | #include "ieee80211_rate.h" | |
47f0c502 | 33 | #include "ieee80211_led.h" |
f0706e82 JB |
34 | |
35 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
36 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
37 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
38 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
39 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
40 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
41 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
42 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
43 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
44 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
45 | ||
46 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
47 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
48 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
49 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
50 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
51 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
52 | ||
53 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
54 | ||
55 | ||
56 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
57 | ||
58 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
59 | ||
9f985b0e RR |
60 | /* mgmt header + 1 byte action code */ |
61 | #define IEEE80211_MIN_ACTION_SIZE (24 + 1) | |
62 | ||
63 | #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002 | |
64 | #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C | |
65 | #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0 | |
688b88a4 RR |
66 | #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000 |
67 | #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800 | |
9f985b0e | 68 | |
07db2183 RR |
69 | /* next values represent the buffer size for A-MPDU frame. |
70 | * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */ | |
71 | #define IEEE80211_MIN_AMPDU_BUF 0x8 | |
72 | #define IEEE80211_MAX_AMPDU_BUF 0x40 | |
73 | ||
f0706e82 JB |
74 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, |
75 | u8 *ssid, size_t ssid_len); | |
76 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
77 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel, |
78 | u8 *ssid, u8 ssid_len); | |
f0706e82 JB |
79 | static void ieee80211_rx_bss_put(struct net_device *dev, |
80 | struct ieee80211_sta_bss *bss); | |
81 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
82 | struct ieee80211_if_sta *ifsta); | |
83 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
84 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
85 | u8 *ssid, size_t ssid_len); | |
86 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
87 | struct ieee80211_if_sta *ifsta); | |
88 | ||
89 | ||
90 | /* Parsed Information Elements */ | |
91 | struct ieee802_11_elems { | |
5558235c | 92 | /* pointers to IEs */ |
f0706e82 | 93 | u8 *ssid; |
f0706e82 | 94 | u8 *supp_rates; |
f0706e82 | 95 | u8 *fh_params; |
f0706e82 | 96 | u8 *ds_params; |
f0706e82 | 97 | u8 *cf_params; |
f0706e82 | 98 | u8 *tim; |
f0706e82 | 99 | u8 *ibss_params; |
f0706e82 | 100 | u8 *challenge; |
f0706e82 | 101 | u8 *wpa; |
f0706e82 | 102 | u8 *rsn; |
f0706e82 | 103 | u8 *erp_info; |
f0706e82 | 104 | u8 *ext_supp_rates; |
f0706e82 | 105 | u8 *wmm_info; |
f0706e82 | 106 | u8 *wmm_param; |
c7153508 RR |
107 | u8 *ht_cap_elem; |
108 | u8 *ht_info_elem; | |
5558235c JB |
109 | /* length of them, respectively */ |
110 | u8 ssid_len; | |
111 | u8 supp_rates_len; | |
112 | u8 fh_params_len; | |
113 | u8 ds_params_len; | |
114 | u8 cf_params_len; | |
115 | u8 tim_len; | |
116 | u8 ibss_params_len; | |
117 | u8 challenge_len; | |
118 | u8 wpa_len; | |
119 | u8 rsn_len; | |
120 | u8 erp_info_len; | |
121 | u8 ext_supp_rates_len; | |
122 | u8 wmm_info_len; | |
f0706e82 | 123 | u8 wmm_param_len; |
c7153508 RR |
124 | u8 ht_cap_elem_len; |
125 | u8 ht_info_elem_len; | |
f0706e82 JB |
126 | }; |
127 | ||
67a4cce4 JL |
128 | static void ieee802_11_parse_elems(u8 *start, size_t len, |
129 | struct ieee802_11_elems *elems) | |
f0706e82 JB |
130 | { |
131 | size_t left = len; | |
132 | u8 *pos = start; | |
f0706e82 JB |
133 | |
134 | memset(elems, 0, sizeof(*elems)); | |
135 | ||
136 | while (left >= 2) { | |
137 | u8 id, elen; | |
138 | ||
139 | id = *pos++; | |
140 | elen = *pos++; | |
141 | left -= 2; | |
142 | ||
67a4cce4 JL |
143 | if (elen > left) |
144 | return; | |
f0706e82 JB |
145 | |
146 | switch (id) { | |
147 | case WLAN_EID_SSID: | |
148 | elems->ssid = pos; | |
149 | elems->ssid_len = elen; | |
150 | break; | |
151 | case WLAN_EID_SUPP_RATES: | |
152 | elems->supp_rates = pos; | |
153 | elems->supp_rates_len = elen; | |
154 | break; | |
155 | case WLAN_EID_FH_PARAMS: | |
156 | elems->fh_params = pos; | |
157 | elems->fh_params_len = elen; | |
158 | break; | |
159 | case WLAN_EID_DS_PARAMS: | |
160 | elems->ds_params = pos; | |
161 | elems->ds_params_len = elen; | |
162 | break; | |
163 | case WLAN_EID_CF_PARAMS: | |
164 | elems->cf_params = pos; | |
165 | elems->cf_params_len = elen; | |
166 | break; | |
167 | case WLAN_EID_TIM: | |
168 | elems->tim = pos; | |
169 | elems->tim_len = elen; | |
170 | break; | |
171 | case WLAN_EID_IBSS_PARAMS: | |
172 | elems->ibss_params = pos; | |
173 | elems->ibss_params_len = elen; | |
174 | break; | |
175 | case WLAN_EID_CHALLENGE: | |
176 | elems->challenge = pos; | |
177 | elems->challenge_len = elen; | |
178 | break; | |
179 | case WLAN_EID_WPA: | |
180 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
181 | pos[2] == 0xf2) { | |
182 | /* Microsoft OUI (00:50:F2) */ | |
183 | if (pos[3] == 1) { | |
184 | /* OUI Type 1 - WPA IE */ | |
185 | elems->wpa = pos; | |
186 | elems->wpa_len = elen; | |
187 | } else if (elen >= 5 && pos[3] == 2) { | |
188 | if (pos[4] == 0) { | |
189 | elems->wmm_info = pos; | |
190 | elems->wmm_info_len = elen; | |
191 | } else if (pos[4] == 1) { | |
192 | elems->wmm_param = pos; | |
193 | elems->wmm_param_len = elen; | |
194 | } | |
195 | } | |
196 | } | |
197 | break; | |
198 | case WLAN_EID_RSN: | |
199 | elems->rsn = pos; | |
200 | elems->rsn_len = elen; | |
201 | break; | |
202 | case WLAN_EID_ERP_INFO: | |
203 | elems->erp_info = pos; | |
204 | elems->erp_info_len = elen; | |
205 | break; | |
206 | case WLAN_EID_EXT_SUPP_RATES: | |
207 | elems->ext_supp_rates = pos; | |
208 | elems->ext_supp_rates_len = elen; | |
209 | break; | |
c7153508 RR |
210 | case WLAN_EID_HT_CAPABILITY: |
211 | elems->ht_cap_elem = pos; | |
212 | elems->ht_cap_elem_len = elen; | |
213 | break; | |
214 | case WLAN_EID_HT_EXTRA_INFO: | |
215 | elems->ht_info_elem = pos; | |
216 | elems->ht_info_elem_len = elen; | |
217 | break; | |
f0706e82 | 218 | default: |
f0706e82 JB |
219 | break; |
220 | } | |
221 | ||
222 | left -= elen; | |
223 | pos += elen; | |
224 | } | |
f0706e82 JB |
225 | } |
226 | ||
227 | ||
f0706e82 JB |
228 | static int ecw2cw(int ecw) |
229 | { | |
230 | int cw = 1; | |
231 | while (ecw > 0) { | |
232 | cw <<= 1; | |
233 | ecw--; | |
234 | } | |
235 | return cw - 1; | |
236 | } | |
237 | ||
f0706e82 JB |
238 | static void ieee80211_sta_wmm_params(struct net_device *dev, |
239 | struct ieee80211_if_sta *ifsta, | |
240 | u8 *wmm_param, size_t wmm_param_len) | |
241 | { | |
242 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
243 | struct ieee80211_tx_queue_params params; | |
244 | size_t left; | |
245 | int count; | |
246 | u8 *pos; | |
247 | ||
248 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
249 | return; | |
250 | count = wmm_param[6] & 0x0f; | |
251 | if (count == ifsta->wmm_last_param_set) | |
252 | return; | |
253 | ifsta->wmm_last_param_set = count; | |
254 | ||
255 | pos = wmm_param + 8; | |
256 | left = wmm_param_len - 8; | |
257 | ||
258 | memset(¶ms, 0, sizeof(params)); | |
259 | ||
260 | if (!local->ops->conf_tx) | |
261 | return; | |
262 | ||
263 | local->wmm_acm = 0; | |
264 | for (; left >= 4; left -= 4, pos += 4) { | |
265 | int aci = (pos[0] >> 5) & 0x03; | |
266 | int acm = (pos[0] >> 4) & 0x01; | |
267 | int queue; | |
268 | ||
269 | switch (aci) { | |
270 | case 1: | |
271 | queue = IEEE80211_TX_QUEUE_DATA3; | |
272 | if (acm) { | |
273 | local->wmm_acm |= BIT(0) | BIT(3); | |
274 | } | |
275 | break; | |
276 | case 2: | |
277 | queue = IEEE80211_TX_QUEUE_DATA1; | |
278 | if (acm) { | |
279 | local->wmm_acm |= BIT(4) | BIT(5); | |
280 | } | |
281 | break; | |
282 | case 3: | |
283 | queue = IEEE80211_TX_QUEUE_DATA0; | |
284 | if (acm) { | |
285 | local->wmm_acm |= BIT(6) | BIT(7); | |
286 | } | |
287 | break; | |
288 | case 0: | |
289 | default: | |
290 | queue = IEEE80211_TX_QUEUE_DATA2; | |
291 | if (acm) { | |
292 | local->wmm_acm |= BIT(1) | BIT(2); | |
293 | } | |
294 | break; | |
295 | } | |
296 | ||
297 | params.aifs = pos[0] & 0x0f; | |
298 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
299 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
300 | /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ | |
301 | params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; | |
302 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
303 | "cWmin=%d cWmax=%d burst=%d\n", | |
304 | dev->name, queue, aci, acm, params.aifs, params.cw_min, | |
305 | params.cw_max, params.burst_time); | |
306 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
307 | * AC for now) */ | |
308 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
309 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
310 | "parameters for queue %d\n", dev->name, queue); | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | ||
471b3efd JB |
316 | static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata, |
317 | u8 erp_value) | |
5628221c | 318 | { |
471b3efd | 319 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
5628221c | 320 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
471b3efd JB |
321 | bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; |
322 | bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0; | |
0795af57 | 323 | DECLARE_MAC_BUF(mac); |
471b3efd | 324 | u32 changed = 0; |
5628221c | 325 | |
471b3efd | 326 | if (use_protection != bss_conf->use_cts_prot) { |
5628221c DD |
327 | if (net_ratelimit()) { |
328 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 329 | "%s)\n", |
471b3efd | 330 | sdata->dev->name, |
5628221c | 331 | use_protection ? "enabled" : "disabled", |
0795af57 | 332 | print_mac(mac, ifsta->bssid)); |
5628221c | 333 | } |
471b3efd JB |
334 | bss_conf->use_cts_prot = use_protection; |
335 | changed |= BSS_CHANGED_ERP_CTS_PROT; | |
5628221c | 336 | } |
7e9ed188 | 337 | |
471b3efd | 338 | if (preamble_mode != bss_conf->use_short_preamble) { |
7e9ed188 DD |
339 | if (net_ratelimit()) { |
340 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 341 | " (BSSID=%s)\n", |
471b3efd | 342 | sdata->dev->name, |
7e9ed188 DD |
343 | (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ? |
344 | "short" : "long", | |
0795af57 | 345 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 346 | } |
471b3efd JB |
347 | bss_conf->use_short_preamble = preamble_mode; |
348 | changed |= BSS_CHANGED_ERP_PREAMBLE; | |
7e9ed188 | 349 | } |
d9430a32 | 350 | |
471b3efd | 351 | return changed; |
5628221c DD |
352 | } |
353 | ||
c7153508 RR |
354 | int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie, |
355 | struct ieee80211_ht_info *ht_info) | |
356 | { | |
357 | ||
358 | if (ht_info == NULL) | |
359 | return -EINVAL; | |
360 | ||
361 | memset(ht_info, 0, sizeof(*ht_info)); | |
362 | ||
363 | if (ht_cap_ie) { | |
364 | u8 ampdu_info = ht_cap_ie->ampdu_params_info; | |
365 | ||
366 | ht_info->ht_supported = 1; | |
367 | ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info); | |
368 | ht_info->ampdu_factor = | |
369 | ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR; | |
370 | ht_info->ampdu_density = | |
371 | (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2; | |
372 | memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16); | |
373 | } else | |
374 | ht_info->ht_supported = 0; | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | int ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
380 | struct ieee80211_ht_addt_info *ht_add_info_ie, | |
381 | struct ieee80211_ht_bss_info *bss_info) | |
382 | { | |
383 | if (bss_info == NULL) | |
384 | return -EINVAL; | |
385 | ||
386 | memset(bss_info, 0, sizeof(*bss_info)); | |
387 | ||
388 | if (ht_add_info_ie) { | |
389 | u16 op_mode; | |
390 | op_mode = le16_to_cpu(ht_add_info_ie->operation_mode); | |
391 | ||
392 | bss_info->primary_channel = ht_add_info_ie->control_chan; | |
393 | bss_info->bss_cap = ht_add_info_ie->ht_param; | |
394 | bss_info->bss_op_mode = (u8)(op_mode & 0xff); | |
395 | } | |
396 | ||
397 | return 0; | |
398 | } | |
5628221c | 399 | |
f0706e82 JB |
400 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
401 | struct ieee80211_if_sta *ifsta) | |
402 | { | |
403 | char *buf; | |
404 | size_t len; | |
405 | int i; | |
406 | union iwreq_data wrqu; | |
407 | ||
408 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
409 | return; | |
410 | ||
411 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 412 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
413 | if (!buf) |
414 | return; | |
415 | ||
416 | len = sprintf(buf, "ASSOCINFO("); | |
417 | if (ifsta->assocreq_ies) { | |
418 | len += sprintf(buf + len, "ReqIEs="); | |
419 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
420 | len += sprintf(buf + len, "%02x", | |
421 | ifsta->assocreq_ies[i]); | |
422 | } | |
423 | } | |
424 | if (ifsta->assocresp_ies) { | |
425 | if (ifsta->assocreq_ies) | |
426 | len += sprintf(buf + len, " "); | |
427 | len += sprintf(buf + len, "RespIEs="); | |
428 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
429 | len += sprintf(buf + len, "%02x", | |
430 | ifsta->assocresp_ies[i]); | |
431 | } | |
432 | } | |
433 | len += sprintf(buf + len, ")"); | |
434 | ||
435 | if (len > IW_CUSTOM_MAX) { | |
436 | len = sprintf(buf, "ASSOCRESPIE="); | |
437 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
438 | len += sprintf(buf + len, "%02x", | |
439 | ifsta->assocresp_ies[i]); | |
440 | } | |
441 | } | |
442 | ||
443 | memset(&wrqu, 0, sizeof(wrqu)); | |
444 | wrqu.data.length = len; | |
445 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
446 | ||
447 | kfree(buf); | |
448 | } | |
449 | ||
450 | ||
451 | static void ieee80211_set_associated(struct net_device *dev, | |
d6f2da5b | 452 | struct ieee80211_if_sta *ifsta, |
47f0c502 | 453 | bool assoc) |
f0706e82 | 454 | { |
471b3efd JB |
455 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
456 | struct ieee80211_local *local = sdata->local; | |
f0706e82 | 457 | union iwreq_data wrqu; |
471b3efd | 458 | u32 changed = BSS_CHANGED_ASSOC; |
f0706e82 | 459 | |
f0706e82 | 460 | if (assoc) { |
5628221c | 461 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
462 | |
463 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
464 | ||
51fb61e7 | 465 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 | 466 | return; |
5628221c | 467 | |
65c107ab | 468 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
cffdd30d JL |
469 | local->hw.conf.channel, |
470 | ifsta->ssid, ifsta->ssid_len); | |
5628221c DD |
471 | if (bss) { |
472 | if (bss->has_erp_value) | |
471b3efd JB |
473 | changed |= ieee80211_handle_erp_ie( |
474 | sdata, bss->erp_value); | |
5628221c DD |
475 | ieee80211_rx_bss_put(dev, bss); |
476 | } | |
477 | ||
f0706e82 | 478 | netif_carrier_on(dev); |
d6f2da5b | 479 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
480 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
481 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
482 | ieee80211_sta_send_associnfo(dev, ifsta); | |
483 | } else { | |
d6f2da5b JS |
484 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
485 | ||
f0706e82 | 486 | netif_carrier_off(dev); |
d9430a32 | 487 | ieee80211_reset_erp_info(dev); |
f0706e82 JB |
488 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
489 | } | |
490 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
491 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
492 | ifsta->last_probe = jiffies; | |
47f0c502 | 493 | ieee80211_led_assoc(local, assoc); |
471b3efd JB |
494 | |
495 | ieee80211_bss_info_change_notify(sdata, changed); | |
f0706e82 JB |
496 | } |
497 | ||
498 | static void ieee80211_set_disassoc(struct net_device *dev, | |
499 | struct ieee80211_if_sta *ifsta, int deauth) | |
500 | { | |
501 | if (deauth) | |
502 | ifsta->auth_tries = 0; | |
503 | ifsta->assoc_tries = 0; | |
504 | ieee80211_set_associated(dev, ifsta, 0); | |
505 | } | |
506 | ||
507 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
508 | int encrypt) | |
509 | { | |
510 | struct ieee80211_sub_if_data *sdata; | |
511 | struct ieee80211_tx_packet_data *pkt_data; | |
512 | ||
513 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
514 | skb->dev = sdata->local->mdev; | |
515 | skb_set_mac_header(skb, 0); | |
516 | skb_set_network_header(skb, 0); | |
517 | skb_set_transport_header(skb, 0); | |
518 | ||
519 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
520 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
521 | pkt_data->ifindex = sdata->dev->ifindex; | |
e8bf9649 JS |
522 | if (!encrypt) |
523 | pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT; | |
f0706e82 JB |
524 | |
525 | dev_queue_xmit(skb); | |
526 | } | |
527 | ||
528 | ||
529 | static void ieee80211_send_auth(struct net_device *dev, | |
530 | struct ieee80211_if_sta *ifsta, | |
531 | int transaction, u8 *extra, size_t extra_len, | |
532 | int encrypt) | |
533 | { | |
534 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
535 | struct sk_buff *skb; | |
536 | struct ieee80211_mgmt *mgmt; | |
537 | ||
538 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
539 | sizeof(*mgmt) + 6 + extra_len); | |
540 | if (!skb) { | |
541 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
542 | "frame\n", dev->name); | |
543 | return; | |
544 | } | |
545 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
546 | ||
547 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
548 | memset(mgmt, 0, 24 + 6); | |
549 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
550 | IEEE80211_STYPE_AUTH); | |
551 | if (encrypt) | |
552 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
553 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
554 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
555 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
556 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
557 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
558 | ifsta->auth_transaction = transaction + 1; | |
559 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
560 | if (extra) | |
561 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
562 | ||
563 | ieee80211_sta_tx(dev, skb, encrypt); | |
564 | } | |
565 | ||
566 | ||
567 | static void ieee80211_authenticate(struct net_device *dev, | |
568 | struct ieee80211_if_sta *ifsta) | |
569 | { | |
0795af57 JP |
570 | DECLARE_MAC_BUF(mac); |
571 | ||
f0706e82 JB |
572 | ifsta->auth_tries++; |
573 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 574 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 575 | " timed out\n", |
0795af57 | 576 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
577 | ifsta->state = IEEE80211_DISABLED; |
578 | return; | |
579 | } | |
580 | ||
581 | ifsta->state = IEEE80211_AUTHENTICATE; | |
0795af57 JP |
582 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
583 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
584 | |
585 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
586 | ||
587 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
588 | } | |
589 | ||
590 | ||
591 | static void ieee80211_send_assoc(struct net_device *dev, | |
592 | struct ieee80211_if_sta *ifsta) | |
593 | { | |
594 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
595 | struct ieee80211_hw_mode *mode; | |
596 | struct sk_buff *skb; | |
597 | struct ieee80211_mgmt *mgmt; | |
598 | u8 *pos, *ies; | |
599 | int i, len; | |
600 | u16 capab; | |
601 | struct ieee80211_sta_bss *bss; | |
602 | int wmm = 0; | |
603 | ||
604 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
605 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
606 | ifsta->ssid_len); | |
607 | if (!skb) { | |
608 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
609 | "frame\n", dev->name); | |
610 | return; | |
611 | } | |
612 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
613 | ||
614 | mode = local->oper_hw_mode; | |
615 | capab = ifsta->capab; | |
616 | if (mode->mode == MODE_IEEE80211G) { | |
617 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
618 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
619 | } | |
cffdd30d JL |
620 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel, |
621 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
622 | if (bss) { |
623 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
624 | capab |= WLAN_CAPABILITY_PRIVACY; | |
625 | if (bss->wmm_ie) { | |
626 | wmm = 1; | |
627 | } | |
628 | ieee80211_rx_bss_put(dev, bss); | |
629 | } | |
630 | ||
631 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
632 | memset(mgmt, 0, 24); | |
633 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
634 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
635 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
636 | ||
d6f2da5b | 637 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 JB |
638 | skb_put(skb, 10); |
639 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
640 | IEEE80211_STYPE_REASSOC_REQ); | |
641 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
642 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
643 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
644 | ETH_ALEN); | |
645 | } else { | |
646 | skb_put(skb, 4); | |
647 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
648 | IEEE80211_STYPE_ASSOC_REQ); | |
649 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
650 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
651 | } | |
652 | ||
653 | /* SSID */ | |
654 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
655 | *pos++ = WLAN_EID_SSID; | |
656 | *pos++ = ifsta->ssid_len; | |
657 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
658 | ||
659 | len = mode->num_rates; | |
660 | if (len > 8) | |
661 | len = 8; | |
662 | pos = skb_put(skb, len + 2); | |
663 | *pos++ = WLAN_EID_SUPP_RATES; | |
664 | *pos++ = len; | |
665 | for (i = 0; i < len; i++) { | |
666 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
667 | *pos++ = (u8) (rate / 5); |
668 | } | |
669 | ||
670 | if (mode->num_rates > len) { | |
671 | pos = skb_put(skb, mode->num_rates - len + 2); | |
672 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
673 | *pos++ = mode->num_rates - len; | |
674 | for (i = len; i < mode->num_rates; i++) { | |
675 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
676 | *pos++ = (u8) (rate / 5); |
677 | } | |
678 | } | |
679 | ||
680 | if (ifsta->extra_ie) { | |
681 | pos = skb_put(skb, ifsta->extra_ie_len); | |
682 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
683 | } | |
684 | ||
d6f2da5b | 685 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
686 | pos = skb_put(skb, 9); |
687 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
688 | *pos++ = 7; /* len */ | |
689 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
690 | *pos++ = 0x50; | |
691 | *pos++ = 0xf2; | |
692 | *pos++ = 2; /* WME */ | |
693 | *pos++ = 0; /* WME info */ | |
694 | *pos++ = 1; /* WME ver */ | |
695 | *pos++ = 0; | |
696 | } | |
c7153508 RR |
697 | /* wmm support is a must to HT */ |
698 | if (wmm && mode->ht_info.ht_supported) { | |
699 | __le16 tmp = cpu_to_le16(mode->ht_info.cap); | |
700 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2); | |
701 | *pos++ = WLAN_EID_HT_CAPABILITY; | |
702 | *pos++ = sizeof(struct ieee80211_ht_cap); | |
703 | memset(pos, 0, sizeof(struct ieee80211_ht_cap)); | |
704 | memcpy(pos, &tmp, sizeof(u16)); | |
705 | pos += sizeof(u16); | |
706 | *pos++ = (mode->ht_info.ampdu_factor | | |
707 | (mode->ht_info.ampdu_density << 2)); | |
708 | memcpy(pos, mode->ht_info.supp_mcs_set, 16); | |
709 | } | |
f0706e82 JB |
710 | |
711 | kfree(ifsta->assocreq_ies); | |
712 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 713 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
714 | if (ifsta->assocreq_ies) |
715 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
716 | ||
717 | ieee80211_sta_tx(dev, skb, 0); | |
718 | } | |
719 | ||
720 | ||
721 | static void ieee80211_send_deauth(struct net_device *dev, | |
722 | struct ieee80211_if_sta *ifsta, u16 reason) | |
723 | { | |
724 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
725 | struct sk_buff *skb; | |
726 | struct ieee80211_mgmt *mgmt; | |
727 | ||
728 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
729 | if (!skb) { | |
730 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
731 | "frame\n", dev->name); | |
732 | return; | |
733 | } | |
734 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
735 | ||
736 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
737 | memset(mgmt, 0, 24); | |
738 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
739 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
740 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
741 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
742 | IEEE80211_STYPE_DEAUTH); | |
743 | skb_put(skb, 2); | |
744 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
745 | ||
746 | ieee80211_sta_tx(dev, skb, 0); | |
747 | } | |
748 | ||
749 | ||
750 | static void ieee80211_send_disassoc(struct net_device *dev, | |
751 | struct ieee80211_if_sta *ifsta, u16 reason) | |
752 | { | |
753 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
754 | struct sk_buff *skb; | |
755 | struct ieee80211_mgmt *mgmt; | |
756 | ||
757 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
758 | if (!skb) { | |
759 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
760 | "frame\n", dev->name); | |
761 | return; | |
762 | } | |
763 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
764 | ||
765 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
766 | memset(mgmt, 0, 24); | |
767 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
768 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
769 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
770 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
771 | IEEE80211_STYPE_DISASSOC); | |
772 | skb_put(skb, 2); | |
773 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
774 | ||
775 | ieee80211_sta_tx(dev, skb, 0); | |
776 | } | |
777 | ||
778 | ||
779 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
780 | struct ieee80211_if_sta *ifsta) | |
781 | { | |
65c107ab | 782 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
f0706e82 | 783 | struct ieee80211_sta_bss *bss; |
5b98b1f7 JB |
784 | int bss_privacy; |
785 | int wep_privacy; | |
786 | int privacy_invoked; | |
f0706e82 | 787 | |
5b98b1f7 | 788 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL)) |
f0706e82 JB |
789 | return 0; |
790 | ||
cffdd30d JL |
791 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel, |
792 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
793 | if (!bss) |
794 | return 0; | |
795 | ||
5b98b1f7 JB |
796 | bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY); |
797 | wep_privacy = !!ieee80211_sta_wep_configured(dev); | |
798 | privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED); | |
f0706e82 JB |
799 | |
800 | ieee80211_rx_bss_put(dev, bss); | |
801 | ||
5b98b1f7 JB |
802 | if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked)) |
803 | return 0; | |
804 | ||
805 | return 1; | |
f0706e82 JB |
806 | } |
807 | ||
808 | ||
809 | static void ieee80211_associate(struct net_device *dev, | |
810 | struct ieee80211_if_sta *ifsta) | |
811 | { | |
0795af57 JP |
812 | DECLARE_MAC_BUF(mac); |
813 | ||
f0706e82 JB |
814 | ifsta->assoc_tries++; |
815 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 816 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 817 | " timed out\n", |
0795af57 | 818 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
819 | ifsta->state = IEEE80211_DISABLED; |
820 | return; | |
821 | } | |
822 | ||
823 | ifsta->state = IEEE80211_ASSOCIATE; | |
0795af57 JP |
824 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
825 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
826 | if (ieee80211_privacy_mismatch(dev, ifsta)) { |
827 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
828 | "mixed-cell disabled - abort association\n", dev->name); | |
829 | ifsta->state = IEEE80211_DISABLED; | |
830 | return; | |
831 | } | |
832 | ||
833 | ieee80211_send_assoc(dev, ifsta); | |
834 | ||
835 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
836 | } | |
837 | ||
838 | ||
839 | static void ieee80211_associated(struct net_device *dev, | |
840 | struct ieee80211_if_sta *ifsta) | |
841 | { | |
842 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
843 | struct sta_info *sta; | |
844 | int disassoc; | |
0795af57 | 845 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
846 | |
847 | /* TODO: start monitoring current AP signal quality and number of | |
848 | * missed beacons. Scan other channels every now and then and search | |
849 | * for better APs. */ | |
850 | /* TODO: remove expired BSSes */ | |
851 | ||
852 | ifsta->state = IEEE80211_ASSOCIATED; | |
853 | ||
854 | sta = sta_info_get(local, ifsta->bssid); | |
855 | if (!sta) { | |
0795af57 JP |
856 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
857 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
858 | disassoc = 1; |
859 | } else { | |
860 | disassoc = 0; | |
861 | if (time_after(jiffies, | |
862 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 863 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 864 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 865 | "current AP %s - assume out of " |
f0706e82 | 866 | "range\n", |
0795af57 | 867 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 868 | disassoc = 1; |
be8755e1 | 869 | sta_info_free(sta); |
d6f2da5b | 870 | } else |
f0706e82 JB |
871 | ieee80211_send_probe_req(dev, ifsta->bssid, |
872 | local->scan_ssid, | |
873 | local->scan_ssid_len); | |
d6f2da5b | 874 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 875 | } else { |
d6f2da5b | 876 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
877 | if (time_after(jiffies, ifsta->last_probe + |
878 | IEEE80211_PROBE_INTERVAL)) { | |
879 | ifsta->last_probe = jiffies; | |
880 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
881 | ifsta->ssid, | |
882 | ifsta->ssid_len); | |
883 | } | |
884 | } | |
885 | sta_info_put(sta); | |
886 | } | |
887 | if (disassoc) { | |
2d192d95 MW |
888 | ifsta->state = IEEE80211_DISABLED; |
889 | ieee80211_set_associated(dev, ifsta, 0); | |
f0706e82 JB |
890 | } else { |
891 | mod_timer(&ifsta->timer, jiffies + | |
892 | IEEE80211_MONITORING_INTERVAL); | |
893 | } | |
894 | } | |
895 | ||
896 | ||
897 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
898 | u8 *ssid, size_t ssid_len) | |
899 | { | |
900 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
901 | struct ieee80211_hw_mode *mode; | |
902 | struct sk_buff *skb; | |
903 | struct ieee80211_mgmt *mgmt; | |
904 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
905 | int i; | |
906 | ||
907 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
908 | if (!skb) { | |
909 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
910 | "request\n", dev->name); | |
911 | return; | |
912 | } | |
913 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
914 | ||
915 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
916 | memset(mgmt, 0, 24); | |
917 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
918 | IEEE80211_STYPE_PROBE_REQ); | |
919 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
920 | if (dst) { | |
921 | memcpy(mgmt->da, dst, ETH_ALEN); | |
922 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
923 | } else { | |
924 | memset(mgmt->da, 0xff, ETH_ALEN); | |
925 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
926 | } | |
927 | pos = skb_put(skb, 2 + ssid_len); | |
928 | *pos++ = WLAN_EID_SSID; | |
929 | *pos++ = ssid_len; | |
930 | memcpy(pos, ssid, ssid_len); | |
931 | ||
932 | supp_rates = skb_put(skb, 2); | |
933 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
934 | supp_rates[1] = 0; | |
935 | mode = local->oper_hw_mode; | |
936 | for (i = 0; i < mode->num_rates; i++) { | |
937 | struct ieee80211_rate *rate = &mode->rates[i]; | |
938 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
939 | continue; | |
940 | if (esupp_rates) { | |
941 | pos = skb_put(skb, 1); | |
942 | esupp_rates[1]++; | |
943 | } else if (supp_rates[1] == 8) { | |
944 | esupp_rates = skb_put(skb, 3); | |
945 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
946 | esupp_rates[1] = 1; | |
947 | pos = &esupp_rates[2]; | |
948 | } else { | |
949 | pos = skb_put(skb, 1); | |
950 | supp_rates[1]++; | |
951 | } | |
b708e610 | 952 | *pos = rate->rate / 5; |
f0706e82 JB |
953 | } |
954 | ||
955 | ieee80211_sta_tx(dev, skb, 0); | |
956 | } | |
957 | ||
958 | ||
959 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
960 | { | |
961 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
962 | if (!sdata || !sdata->default_key || | |
8f20fc24 | 963 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
964 | return 0; |
965 | return 1; | |
966 | } | |
967 | ||
968 | ||
969 | static void ieee80211_auth_completed(struct net_device *dev, | |
970 | struct ieee80211_if_sta *ifsta) | |
971 | { | |
972 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
d6f2da5b | 973 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
974 | ieee80211_associate(dev, ifsta); |
975 | } | |
976 | ||
977 | ||
978 | static void ieee80211_auth_challenge(struct net_device *dev, | |
979 | struct ieee80211_if_sta *ifsta, | |
980 | struct ieee80211_mgmt *mgmt, | |
981 | size_t len) | |
982 | { | |
983 | u8 *pos; | |
984 | struct ieee802_11_elems elems; | |
985 | ||
986 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
987 | pos = mgmt->u.auth.variable; | |
67a4cce4 | 988 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
989 | if (!elems.challenge) { |
990 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
991 | "frame\n", dev->name); | |
992 | return; | |
993 | } | |
994 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
995 | elems.challenge_len + 2, 1); | |
996 | } | |
997 | ||
9f985b0e RR |
998 | static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid, |
999 | u8 dialog_token, u16 status, u16 policy, | |
1000 | u16 buf_size, u16 timeout) | |
1001 | { | |
1002 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1003 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1004 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1005 | struct sk_buff *skb; | |
1006 | struct ieee80211_mgmt *mgmt; | |
1007 | u16 capab; | |
1008 | ||
07db2183 RR |
1009 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + |
1010 | sizeof(mgmt->u.action.u.addba_resp)); | |
9f985b0e RR |
1011 | if (!skb) { |
1012 | printk(KERN_DEBUG "%s: failed to allocate buffer " | |
1013 | "for addba resp frame\n", dev->name); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1018 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1019 | memset(mgmt, 0, 24); | |
1020 | memcpy(mgmt->da, da, ETH_ALEN); | |
1021 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
51fb61e7 | 1022 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
9f985b0e RR |
1023 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); |
1024 | else | |
1025 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1026 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1027 | IEEE80211_STYPE_ACTION); | |
1028 | ||
1029 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp)); | |
1030 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1031 | mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP; | |
1032 | mgmt->u.action.u.addba_resp.dialog_token = dialog_token; | |
1033 | ||
1034 | capab = (u16)(policy << 1); /* bit 1 aggregation policy */ | |
1035 | capab |= (u16)(tid << 2); /* bit 5:2 TID number */ | |
1036 | capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */ | |
1037 | ||
1038 | mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab); | |
1039 | mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); | |
1040 | mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); | |
1041 | ||
1042 | ieee80211_sta_tx(dev, skb, 0); | |
1043 | ||
1044 | return; | |
1045 | } | |
1046 | ||
1047 | static void ieee80211_sta_process_addba_request(struct net_device *dev, | |
1048 | struct ieee80211_mgmt *mgmt, | |
1049 | size_t len) | |
1050 | { | |
1051 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
07db2183 RR |
1052 | struct ieee80211_hw *hw = &local->hw; |
1053 | struct ieee80211_conf *conf = &hw->conf; | |
9f985b0e | 1054 | struct sta_info *sta; |
07db2183 RR |
1055 | struct tid_ampdu_rx *tid_agg_rx; |
1056 | u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status; | |
9f985b0e | 1057 | u8 dialog_token; |
07db2183 RR |
1058 | int ret = -EOPNOTSUPP; |
1059 | DECLARE_MAC_BUF(mac); | |
9f985b0e RR |
1060 | |
1061 | sta = sta_info_get(local, mgmt->sa); | |
1062 | if (!sta) | |
1063 | return; | |
1064 | ||
1065 | /* extract session parameters from addba request frame */ | |
1066 | dialog_token = mgmt->u.action.u.addba_req.dialog_token; | |
1067 | timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout); | |
07db2183 RR |
1068 | start_seq_num = |
1069 | le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4; | |
9f985b0e RR |
1070 | |
1071 | capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab); | |
1072 | ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1; | |
1073 | tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; | |
1074 | buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; | |
1075 | ||
9f985b0e RR |
1076 | status = WLAN_STATUS_REQUEST_DECLINED; |
1077 | ||
07db2183 RR |
1078 | /* sanity check for incoming parameters: |
1079 | * check if configuration can support the BA policy | |
1080 | * and if buffer size does not exceeds max value */ | |
1081 | if (((ba_policy != 1) | |
1082 | && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA))) | |
1083 | || (buf_size > IEEE80211_MAX_AMPDU_BUF)) { | |
1084 | status = WLAN_STATUS_INVALID_QOS_PARAM; | |
1085 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1086 | if (net_ratelimit()) | |
1087 | printk(KERN_DEBUG "Block Ack Req with bad params from " | |
1088 | "%s on tid %u. policy %d, buffer size %d\n", | |
1089 | print_mac(mac, mgmt->sa), tid, ba_policy, | |
1090 | buf_size); | |
1091 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1092 | goto end_no_lock; | |
1093 | } | |
1094 | /* determine default buffer size */ | |
1095 | if (buf_size == 0) { | |
1096 | struct ieee80211_hw_mode *mode = conf->mode; | |
1097 | buf_size = IEEE80211_MIN_AMPDU_BUF; | |
1098 | buf_size = buf_size << mode->ht_info.ampdu_factor; | |
1099 | } | |
1100 | ||
1101 | tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid]; | |
1102 | ||
1103 | /* examine state machine */ | |
1104 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1105 | ||
1106 | if (tid_agg_rx->state != HT_AGG_STATE_IDLE) { | |
1107 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1108 | if (net_ratelimit()) | |
1109 | printk(KERN_DEBUG "unexpected Block Ack Req from " | |
1110 | "%s on tid %u\n", | |
1111 | print_mac(mac, mgmt->sa), tid); | |
1112 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1113 | goto end; | |
1114 | } | |
1115 | ||
1116 | /* prepare reordering buffer */ | |
1117 | tid_agg_rx->reorder_buf = | |
1118 | kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC); | |
1119 | if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) { | |
1120 | printk(KERN_ERR "can not allocate reordering buffer " | |
1121 | "to tid %d\n", tid); | |
1122 | goto end; | |
1123 | } | |
1124 | memset(tid_agg_rx->reorder_buf, 0, | |
1125 | buf_size * sizeof(struct sk_buf *)); | |
1126 | ||
1127 | if (local->ops->ampdu_action) | |
1128 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START, | |
1129 | sta->addr, tid, start_seq_num); | |
1130 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1131 | printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret); | |
1132 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1133 | ||
1134 | if (ret) { | |
1135 | kfree(tid_agg_rx->reorder_buf); | |
1136 | goto end; | |
1137 | } | |
1138 | ||
1139 | /* change state and send addba resp */ | |
1140 | tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL; | |
1141 | tid_agg_rx->dialog_token = dialog_token; | |
1142 | tid_agg_rx->ssn = start_seq_num; | |
1143 | tid_agg_rx->head_seq_num = start_seq_num; | |
1144 | tid_agg_rx->buf_size = buf_size; | |
1145 | tid_agg_rx->timeout = timeout; | |
1146 | tid_agg_rx->stored_mpdu_num = 0; | |
1147 | status = WLAN_STATUS_SUCCESS; | |
1148 | end: | |
1149 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1150 | ||
1151 | end_no_lock: | |
9f985b0e RR |
1152 | ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token, |
1153 | status, 1, buf_size, timeout); | |
1154 | sta_info_put(sta); | |
1155 | } | |
f0706e82 | 1156 | |
71ebb4aa RR |
1157 | static void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid, |
1158 | u16 initiator, u16 reason_code) | |
07db2183 RR |
1159 | { |
1160 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1161 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1162 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1163 | struct sk_buff *skb; | |
1164 | struct ieee80211_mgmt *mgmt; | |
1165 | u16 params; | |
1166 | ||
1167 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 + | |
1168 | sizeof(mgmt->u.action.u.delba)); | |
1169 | ||
1170 | if (!skb) { | |
1171 | printk(KERN_ERR "%s: failed to allocate buffer " | |
1172 | "for delba frame\n", dev->name); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1177 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
1178 | memset(mgmt, 0, 24); | |
1179 | memcpy(mgmt->da, da, ETH_ALEN); | |
1180 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
51fb61e7 | 1181 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) |
07db2183 RR |
1182 | memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN); |
1183 | else | |
1184 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
1185 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
1186 | IEEE80211_STYPE_ACTION); | |
1187 | ||
1188 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
1189 | ||
1190 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
1191 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
1192 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
1193 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
1194 | ||
1195 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
1196 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
1197 | ||
1198 | ieee80211_sta_tx(dev, skb, 0); | |
1199 | } | |
1200 | ||
1201 | void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid, | |
1202 | u16 initiator, u16 reason) | |
1203 | { | |
1204 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1205 | struct ieee80211_hw *hw = &local->hw; | |
1206 | struct sta_info *sta; | |
b580781e | 1207 | int ret, i; |
07db2183 RR |
1208 | |
1209 | sta = sta_info_get(local, ra); | |
1210 | if (!sta) | |
1211 | return; | |
1212 | ||
1213 | /* check if TID is in operational state */ | |
1214 | spin_lock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1215 | if (sta->ampdu_mlme.tid_rx[tid].state | |
1216 | != HT_AGG_STATE_OPERATIONAL) { | |
1217 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
07db2183 RR |
1218 | sta_info_put(sta); |
1219 | return; | |
1220 | } | |
1221 | sta->ampdu_mlme.tid_rx[tid].state = | |
1222 | HT_AGG_STATE_REQ_STOP_BA_MSK | | |
1223 | (initiator << HT_AGG_STATE_INITIATOR_SHIFT); | |
1224 | spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx); | |
1225 | ||
1226 | /* stop HW Rx aggregation. ampdu_action existence | |
1227 | * already verified in session init so we add the BUG_ON */ | |
1228 | BUG_ON(!local->ops->ampdu_action); | |
1229 | ||
1230 | ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP, | |
1231 | ra, tid, EINVAL); | |
1232 | if (ret) | |
1233 | printk(KERN_DEBUG "HW problem - can not stop rx " | |
1234 | "aggergation for tid %d\n", tid); | |
1235 | ||
1236 | /* shutdown timer has not expired */ | |
1237 | if (initiator != WLAN_BACK_TIMER) | |
1238 | del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]. | |
1239 | session_timer); | |
1240 | ||
1241 | /* check if this is a self generated aggregation halt */ | |
1242 | if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER) | |
1243 | ieee80211_send_delba(dev, ra, tid, 0, reason); | |
1244 | ||
1245 | /* free the reordering buffer */ | |
b580781e RR |
1246 | for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) { |
1247 | if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) { | |
1248 | /* release the reordered frames */ | |
1249 | dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]); | |
1250 | sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--; | |
1251 | sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL; | |
1252 | } | |
1253 | } | |
07db2183 RR |
1254 | kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf); |
1255 | ||
1256 | sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE; | |
1257 | sta_info_put(sta); | |
1258 | } | |
1259 | ||
688b88a4 RR |
1260 | static void ieee80211_sta_process_delba(struct net_device *dev, |
1261 | struct ieee80211_mgmt *mgmt, size_t len) | |
1262 | { | |
1263 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1264 | struct sta_info *sta; | |
1265 | u16 tid, params; | |
1266 | u16 initiator; | |
1267 | DECLARE_MAC_BUF(mac); | |
1268 | ||
1269 | sta = sta_info_get(local, mgmt->sa); | |
1270 | if (!sta) | |
1271 | return; | |
1272 | ||
1273 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
1274 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
1275 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
1276 | ||
1277 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
1278 | if (net_ratelimit()) | |
1279 | printk(KERN_DEBUG "delba from %s on tid %d reason code %d\n", | |
1280 | print_mac(mac, mgmt->sa), tid, | |
1281 | mgmt->u.action.u.delba.reason_code); | |
1282 | #endif /* CONFIG_MAC80211_HT_DEBUG */ | |
1283 | ||
1284 | if (initiator == WLAN_BACK_INITIATOR) | |
1285 | ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid, | |
1286 | WLAN_BACK_INITIATOR, 0); | |
1287 | sta_info_put(sta); | |
1288 | } | |
1289 | ||
07db2183 RR |
1290 | /* |
1291 | * After receiving Block Ack Request (BAR) we activated a | |
1292 | * timer after each frame arrives from the originator. | |
1293 | * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed. | |
1294 | */ | |
1295 | void sta_rx_agg_session_timer_expired(unsigned long data) | |
1296 | { | |
1297 | /* not an elegant detour, but there is no choice as the timer passes | |
1298 | * only one argument, and verious sta_info are needed here, so init | |
1299 | * flow in sta_info_add gives the TID as data, while the timer_to_id | |
1300 | * array gives the sta through container_of */ | |
1301 | u8 *ptid = (u8 *)data; | |
1302 | u8 *timer_to_id = ptid - *ptid; | |
1303 | struct sta_info *sta = container_of(timer_to_id, struct sta_info, | |
1304 | timer_to_tid[0]); | |
1305 | ||
1306 | printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid); | |
1307 | ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid, | |
1308 | WLAN_BACK_TIMER, | |
1309 | WLAN_REASON_QSTA_TIMEOUT); | |
1310 | } | |
1311 | ||
1312 | ||
f0706e82 JB |
1313 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, |
1314 | struct ieee80211_if_sta *ifsta, | |
1315 | struct ieee80211_mgmt *mgmt, | |
1316 | size_t len) | |
1317 | { | |
1318 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1319 | u16 auth_alg, auth_transaction, status_code; | |
0795af57 | 1320 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1321 | |
1322 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
51fb61e7 | 1323 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 1324 | printk(KERN_DEBUG "%s: authentication frame received from " |
0795af57 JP |
1325 | "%s, but not in authenticate state - ignored\n", |
1326 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1327 | return; |
1328 | } | |
1329 | ||
1330 | if (len < 24 + 6) { | |
1331 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
0795af57 JP |
1332 | "received from %s - ignored\n", |
1333 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1334 | return; |
1335 | } | |
1336 | ||
51fb61e7 | 1337 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f0706e82 JB |
1338 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { |
1339 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1340 | "unknown AP (SA=%s BSSID=%s) - " |
1341 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1342 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1343 | return; |
1344 | } | |
1345 | ||
51fb61e7 | 1346 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS && |
f0706e82 JB |
1347 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { |
1348 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
1349 | "unknown BSSID (SA=%s BSSID=%s) - " |
1350 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1351 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1352 | return; |
1353 | } | |
1354 | ||
1355 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
1356 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
1357 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
1358 | ||
0795af57 | 1359 | printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d " |
f0706e82 | 1360 | "transaction=%d status=%d)\n", |
0795af57 | 1361 | dev->name, print_mac(mac, mgmt->sa), auth_alg, |
f0706e82 JB |
1362 | auth_transaction, status_code); |
1363 | ||
51fb61e7 | 1364 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 JB |
1365 | /* IEEE 802.11 standard does not require authentication in IBSS |
1366 | * networks and most implementations do not seem to use it. | |
1367 | * However, try to reply to authentication attempts if someone | |
1368 | * has actually implemented this. | |
1369 | * TODO: Could implement shared key authentication. */ | |
1370 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
1371 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
1372 | "frame (alg=%d transaction=%d)\n", | |
1373 | dev->name, auth_alg, auth_transaction); | |
1374 | return; | |
1375 | } | |
1376 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
1377 | } | |
1378 | ||
1379 | if (auth_alg != ifsta->auth_alg || | |
1380 | auth_transaction != ifsta->auth_transaction) { | |
1381 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
1382 | "(alg=%d transaction=%d)\n", | |
1383 | dev->name, auth_alg, auth_transaction); | |
1384 | return; | |
1385 | } | |
1386 | ||
1387 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1388 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
1389 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
1390 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1391 | u8 algs[3]; | |
1392 | const int num_algs = ARRAY_SIZE(algs); | |
1393 | int i, pos; | |
1394 | algs[0] = algs[1] = algs[2] = 0xff; | |
1395 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1396 | algs[0] = WLAN_AUTH_OPEN; | |
1397 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1398 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1399 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1400 | algs[2] = WLAN_AUTH_LEAP; | |
1401 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1402 | pos = 0; | |
1403 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1404 | pos = 1; | |
1405 | else | |
1406 | pos = 2; | |
1407 | for (i = 0; i < num_algs; i++) { | |
1408 | pos++; | |
1409 | if (pos >= num_algs) | |
1410 | pos = 0; | |
1411 | if (algs[pos] == ifsta->auth_alg || | |
1412 | algs[pos] == 0xff) | |
1413 | continue; | |
1414 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1415 | !ieee80211_sta_wep_configured(dev)) | |
1416 | continue; | |
1417 | ifsta->auth_alg = algs[pos]; | |
1418 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1419 | "next try\n", | |
1420 | dev->name, ifsta->auth_alg); | |
1421 | break; | |
1422 | } | |
1423 | } | |
1424 | return; | |
1425 | } | |
1426 | ||
1427 | switch (ifsta->auth_alg) { | |
1428 | case WLAN_AUTH_OPEN: | |
1429 | case WLAN_AUTH_LEAP: | |
1430 | ieee80211_auth_completed(dev, ifsta); | |
1431 | break; | |
1432 | case WLAN_AUTH_SHARED_KEY: | |
1433 | if (ifsta->auth_transaction == 4) | |
1434 | ieee80211_auth_completed(dev, ifsta); | |
1435 | else | |
1436 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1437 | break; | |
1438 | } | |
1439 | } | |
1440 | ||
1441 | ||
1442 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1443 | struct ieee80211_if_sta *ifsta, | |
1444 | struct ieee80211_mgmt *mgmt, | |
1445 | size_t len) | |
1446 | { | |
1447 | u16 reason_code; | |
0795af57 | 1448 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1449 | |
1450 | if (len < 24 + 2) { | |
1451 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
0795af57 JP |
1452 | "received from %s - ignored\n", |
1453 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1454 | return; |
1455 | } | |
1456 | ||
1457 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1458 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
0795af57 JP |
1459 | "unknown AP (SA=%s BSSID=%s) - " |
1460 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1461 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1462 | return; |
1463 | } | |
1464 | ||
1465 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1466 | ||
0795af57 | 1467 | printk(KERN_DEBUG "%s: RX deauthentication from %s" |
f0706e82 | 1468 | " (reason=%d)\n", |
0795af57 | 1469 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1470 | |
d6f2da5b | 1471 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) { |
f0706e82 JB |
1472 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); |
1473 | } | |
1474 | ||
1475 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1476 | ifsta->state == IEEE80211_ASSOCIATE || | |
1477 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1478 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1479 | mod_timer(&ifsta->timer, jiffies + | |
1480 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1481 | } | |
1482 | ||
1483 | ieee80211_set_disassoc(dev, ifsta, 1); | |
d6f2da5b | 1484 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1485 | } |
1486 | ||
1487 | ||
1488 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1489 | struct ieee80211_if_sta *ifsta, | |
1490 | struct ieee80211_mgmt *mgmt, | |
1491 | size_t len) | |
1492 | { | |
1493 | u16 reason_code; | |
0795af57 | 1494 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1495 | |
1496 | if (len < 24 + 2) { | |
1497 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
0795af57 JP |
1498 | "received from %s - ignored\n", |
1499 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1500 | return; |
1501 | } | |
1502 | ||
1503 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1504 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
0795af57 JP |
1505 | "unknown AP (SA=%s BSSID=%s) - " |
1506 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1507 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1508 | return; |
1509 | } | |
1510 | ||
1511 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1512 | ||
0795af57 | 1513 | printk(KERN_DEBUG "%s: RX disassociation from %s" |
f0706e82 | 1514 | " (reason=%d)\n", |
0795af57 | 1515 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1516 | |
d6f2da5b | 1517 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
1518 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); |
1519 | ||
1520 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1521 | ifsta->state = IEEE80211_ASSOCIATE; | |
1522 | mod_timer(&ifsta->timer, jiffies + | |
1523 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1524 | } | |
1525 | ||
1526 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1527 | } | |
1528 | ||
1529 | ||
471b3efd | 1530 | static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, |
f0706e82 JB |
1531 | struct ieee80211_if_sta *ifsta, |
1532 | struct ieee80211_mgmt *mgmt, | |
1533 | size_t len, | |
1534 | int reassoc) | |
1535 | { | |
471b3efd JB |
1536 | struct ieee80211_local *local = sdata->local; |
1537 | struct net_device *dev = sdata->dev; | |
f0706e82 JB |
1538 | struct ieee80211_hw_mode *mode; |
1539 | struct sta_info *sta; | |
1540 | u32 rates; | |
1541 | u16 capab_info, status_code, aid; | |
1542 | struct ieee802_11_elems elems; | |
471b3efd | 1543 | struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf; |
f0706e82 JB |
1544 | u8 *pos; |
1545 | int i, j; | |
0795af57 | 1546 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1547 | |
1548 | /* AssocResp and ReassocResp have identical structure, so process both | |
1549 | * of them in this function. */ | |
1550 | ||
1551 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1552 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1553 | "%s, but not in associate state - ignored\n", |
1554 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1555 | return; |
1556 | } | |
1557 | ||
1558 | if (len < 24 + 6) { | |
1559 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
0795af57 JP |
1560 | "received from %s - ignored\n", |
1561 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1562 | return; |
1563 | } | |
1564 | ||
1565 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1566 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1567 | "unknown AP (SA=%s BSSID=%s) - " |
1568 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1569 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1570 | return; |
1571 | } | |
1572 | ||
1573 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1574 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1575 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
f0706e82 | 1576 | |
0795af57 | 1577 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1578 | "status=%d aid=%d)\n", |
0795af57 | 1579 | dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
ddd68587 | 1580 | capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); |
f0706e82 JB |
1581 | |
1582 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1583 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1584 | dev->name, status_code); | |
8a69aa93 DD |
1585 | /* if this was a reassociation, ensure we try a "full" |
1586 | * association next time. This works around some broken APs | |
1587 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1588 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1589 | return; |
1590 | } | |
1591 | ||
1dd84aa2 JB |
1592 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) |
1593 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1594 | "set\n", dev->name, aid); | |
1595 | aid &= ~(BIT(15) | BIT(14)); | |
1596 | ||
f0706e82 | 1597 | pos = mgmt->u.assoc_resp.variable; |
67a4cce4 | 1598 | ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems); |
f0706e82 JB |
1599 | |
1600 | if (!elems.supp_rates) { | |
1601 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1602 | dev->name); | |
1603 | return; | |
1604 | } | |
1605 | ||
1606 | printk(KERN_DEBUG "%s: associated\n", dev->name); | |
1607 | ifsta->aid = aid; | |
1608 | ifsta->ap_capab = capab_info; | |
1609 | ||
1610 | kfree(ifsta->assocresp_ies); | |
1611 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1612 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1613 | if (ifsta->assocresp_ies) |
1614 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1615 | ||
471b3efd JB |
1616 | /* set AID, ieee80211_set_associated() will tell the driver */ |
1617 | bss_conf->aid = aid; | |
f0706e82 JB |
1618 | ieee80211_set_associated(dev, ifsta, 1); |
1619 | ||
1620 | /* Add STA entry for the AP */ | |
1621 | sta = sta_info_get(local, ifsta->bssid); | |
1622 | if (!sta) { | |
1623 | struct ieee80211_sta_bss *bss; | |
0ec0b7ac | 1624 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL); |
f0706e82 JB |
1625 | if (!sta) { |
1626 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1627 | " AP\n", dev->name); | |
1628 | return; | |
1629 | } | |
65c107ab | 1630 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid, |
cffdd30d JL |
1631 | local->hw.conf.channel, |
1632 | ifsta->ssid, ifsta->ssid_len); | |
f0706e82 JB |
1633 | if (bss) { |
1634 | sta->last_rssi = bss->rssi; | |
1635 | sta->last_signal = bss->signal; | |
1636 | sta->last_noise = bss->noise; | |
1637 | ieee80211_rx_bss_put(dev, bss); | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | sta->dev = dev; | |
c9ee23df | 1642 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP; |
f0706e82 JB |
1643 | |
1644 | rates = 0; | |
1645 | mode = local->oper_hw_mode; | |
1646 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1647 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1648 | for (j = 0; j < mode->num_rates; j++) |
1649 | if (mode->rates[j].rate == rate) | |
1650 | rates |= BIT(j); | |
1651 | } | |
1652 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1653 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1654 | for (j = 0; j < mode->num_rates; j++) |
1655 | if (mode->rates[j].rate == rate) | |
1656 | rates |= BIT(j); | |
1657 | } | |
1658 | sta->supp_rates = rates; | |
1659 | ||
d3c990fb RR |
1660 | if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param && |
1661 | local->ops->conf_ht) { | |
1662 | struct ieee80211_ht_bss_info bss_info; | |
1663 | ||
1664 | ieee80211_ht_cap_ie_to_ht_info( | |
1665 | (struct ieee80211_ht_cap *) | |
1666 | elems.ht_cap_elem, &sta->ht_info); | |
1667 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
1668 | (struct ieee80211_ht_addt_info *) | |
1669 | elems.ht_info_elem, &bss_info); | |
1670 | ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info); | |
1671 | } | |
1672 | ||
f0706e82 JB |
1673 | rate_control_rate_init(sta, local); |
1674 | ||
d6f2da5b | 1675 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
1676 | sta->flags |= WLAN_STA_WME; |
1677 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1678 | elems.wmm_param_len); | |
1679 | } | |
1680 | ||
1681 | ||
1682 | sta_info_put(sta); | |
1683 | ||
1684 | ieee80211_associated(dev, ifsta); | |
1685 | } | |
1686 | ||
1687 | ||
1688 | /* Caller must hold local->sta_bss_lock */ | |
1689 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1690 | struct ieee80211_sta_bss *bss) | |
1691 | { | |
1692 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1693 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1694 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1695 | } | |
1696 | ||
1697 | ||
1698 | /* Caller must hold local->sta_bss_lock */ | |
1699 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1700 | struct ieee80211_sta_bss *bss) | |
1701 | { | |
1702 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1703 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1704 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1705 | while (b) { | |
1706 | if (b == bss) { | |
1707 | if (!prev) | |
1708 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1709 | bss->hnext; | |
1710 | else | |
1711 | prev->hnext = bss->hnext; | |
1712 | break; | |
1713 | } | |
1714 | prev = b; | |
1715 | b = b->hnext; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | ||
1720 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
1721 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel, |
1722 | u8 *ssid, u8 ssid_len) | |
f0706e82 JB |
1723 | { |
1724 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1725 | struct ieee80211_sta_bss *bss; | |
1726 | ||
dd00cc48 | 1727 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
1728 | if (!bss) |
1729 | return NULL; | |
f0706e82 JB |
1730 | atomic_inc(&bss->users); |
1731 | atomic_inc(&bss->users); | |
1732 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
65c107ab | 1733 | bss->channel = channel; |
cffdd30d JL |
1734 | if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) { |
1735 | memcpy(bss->ssid, ssid, ssid_len); | |
1736 | bss->ssid_len = ssid_len; | |
1737 | } | |
f0706e82 JB |
1738 | |
1739 | spin_lock_bh(&local->sta_bss_lock); | |
1740 | /* TODO: order by RSSI? */ | |
1741 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1742 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1743 | spin_unlock_bh(&local->sta_bss_lock); | |
1744 | return bss; | |
1745 | } | |
1746 | ||
1747 | ||
1748 | static struct ieee80211_sta_bss * | |
cffdd30d JL |
1749 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel, |
1750 | u8 *ssid, u8 ssid_len) | |
f0706e82 JB |
1751 | { |
1752 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1753 | struct ieee80211_sta_bss *bss; | |
1754 | ||
1755 | spin_lock_bh(&local->sta_bss_lock); | |
1756 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1757 | while (bss) { | |
cffdd30d JL |
1758 | if (!memcmp(bss->bssid, bssid, ETH_ALEN) && |
1759 | bss->channel == channel && | |
1760 | bss->ssid_len == ssid_len && | |
1761 | (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) { | |
f0706e82 JB |
1762 | atomic_inc(&bss->users); |
1763 | break; | |
1764 | } | |
1765 | bss = bss->hnext; | |
1766 | } | |
1767 | spin_unlock_bh(&local->sta_bss_lock); | |
1768 | return bss; | |
1769 | } | |
1770 | ||
1771 | ||
1772 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1773 | { | |
1774 | kfree(bss->wpa_ie); | |
1775 | kfree(bss->rsn_ie); | |
1776 | kfree(bss->wmm_ie); | |
c7153508 | 1777 | kfree(bss->ht_ie); |
f0706e82 JB |
1778 | kfree(bss); |
1779 | } | |
1780 | ||
1781 | ||
1782 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1783 | struct ieee80211_sta_bss *bss) | |
1784 | { | |
1785 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1786 | if (!atomic_dec_and_test(&bss->users)) | |
1787 | return; | |
1788 | ||
1789 | spin_lock_bh(&local->sta_bss_lock); | |
1790 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1791 | list_del(&bss->list); | |
1792 | spin_unlock_bh(&local->sta_bss_lock); | |
1793 | ieee80211_rx_bss_free(bss); | |
1794 | } | |
1795 | ||
1796 | ||
1797 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1798 | { | |
1799 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1800 | spin_lock_init(&local->sta_bss_lock); | |
1801 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1802 | } | |
1803 | ||
1804 | ||
1805 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1806 | { | |
1807 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1808 | struct ieee80211_sta_bss *bss, *tmp; | |
1809 | ||
1810 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1811 | ieee80211_rx_bss_put(dev, bss); | |
1812 | } | |
1813 | ||
1814 | ||
1815 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1816 | struct ieee80211_mgmt *mgmt, | |
1817 | size_t len, | |
1818 | struct ieee80211_rx_status *rx_status, | |
1819 | int beacon) | |
1820 | { | |
1821 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1822 | struct ieee802_11_elems elems; | |
1823 | size_t baselen; | |
67a4cce4 | 1824 | int channel, clen; |
f0706e82 JB |
1825 | struct ieee80211_sta_bss *bss; |
1826 | struct sta_info *sta; | |
1827 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1828 | u64 timestamp; | |
0795af57 JP |
1829 | DECLARE_MAC_BUF(mac); |
1830 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
1831 | |
1832 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1833 | return; /* ignore ProbeResp to foreign address */ | |
1834 | ||
1835 | #if 0 | |
0795af57 | 1836 | printk(KERN_DEBUG "%s: RX %s from %s to %s\n", |
f0706e82 | 1837 | dev->name, beacon ? "Beacon" : "Probe Response", |
0795af57 | 1838 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da)); |
f0706e82 JB |
1839 | #endif |
1840 | ||
1841 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1842 | if (baselen > len) | |
1843 | return; | |
1844 | ||
1845 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1846 | ||
51fb61e7 | 1847 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon && |
f0706e82 JB |
1848 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { |
1849 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1850 | static unsigned long last_tsf_debug = 0; | |
1851 | u64 tsf; | |
1852 | if (local->ops->get_tsf) | |
1853 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1854 | else | |
1855 | tsf = -1LLU; | |
1856 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
0795af57 JP |
1857 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" |
1858 | "%s TSF=0x%llx BCN=0x%llx diff=%lld " | |
f0706e82 | 1859 | "@%lu\n", |
0795af57 | 1860 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid), |
f0706e82 JB |
1861 | (unsigned long long)tsf, |
1862 | (unsigned long long)timestamp, | |
1863 | (unsigned long long)(tsf - timestamp), | |
1864 | jiffies); | |
1865 | last_tsf_debug = jiffies; | |
1866 | } | |
1867 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1868 | } | |
1869 | ||
67a4cce4 | 1870 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 | 1871 | |
51fb61e7 | 1872 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && |
f0706e82 JB |
1873 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && |
1874 | (sta = sta_info_get(local, mgmt->sa))) { | |
1875 | struct ieee80211_hw_mode *mode; | |
1876 | struct ieee80211_rate *rates; | |
1877 | size_t num_rates; | |
1878 | u32 supp_rates, prev_rates; | |
1879 | int i, j; | |
1880 | ||
ece8eddd | 1881 | mode = local->sta_sw_scanning ? |
f0706e82 | 1882 | local->scan_hw_mode : local->oper_hw_mode; |
ece8eddd ZY |
1883 | |
1884 | if (local->sta_hw_scanning) { | |
1885 | /* search for the correct mode matches the beacon */ | |
1886 | list_for_each_entry(mode, &local->modes_list, list) | |
1887 | if (mode->mode == rx_status->phymode) | |
1888 | break; | |
1889 | ||
1890 | if (mode == NULL) | |
1891 | mode = local->oper_hw_mode; | |
1892 | } | |
f0706e82 JB |
1893 | rates = mode->rates; |
1894 | num_rates = mode->num_rates; | |
1895 | ||
1896 | supp_rates = 0; | |
1897 | for (i = 0; i < elems.supp_rates_len + | |
1898 | elems.ext_supp_rates_len; i++) { | |
1899 | u8 rate = 0; | |
1900 | int own_rate; | |
1901 | if (i < elems.supp_rates_len) | |
1902 | rate = elems.supp_rates[i]; | |
1903 | else if (elems.ext_supp_rates) | |
1904 | rate = elems.ext_supp_rates | |
1905 | [i - elems.supp_rates_len]; | |
1906 | own_rate = 5 * (rate & 0x7f); | |
f0706e82 JB |
1907 | for (j = 0; j < num_rates; j++) |
1908 | if (rates[j].rate == own_rate) | |
1909 | supp_rates |= BIT(j); | |
1910 | } | |
1911 | ||
1912 | prev_rates = sta->supp_rates; | |
1913 | sta->supp_rates &= supp_rates; | |
1914 | if (sta->supp_rates == 0) { | |
1915 | /* No matching rates - this should not really happen. | |
1916 | * Make sure that at least one rate is marked | |
1917 | * supported to avoid issues with TX rate ctrl. */ | |
1918 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1919 | } | |
1920 | if (sta->supp_rates != prev_rates) { | |
1921 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
0795af57 | 1922 | "%s based on beacon info (0x%x & 0x%x -> " |
f0706e82 | 1923 | "0x%x)\n", |
0795af57 | 1924 | dev->name, print_mac(mac, sta->addr), prev_rates, |
f0706e82 JB |
1925 | supp_rates, sta->supp_rates); |
1926 | } | |
1927 | sta_info_put(sta); | |
1928 | } | |
1929 | ||
1930 | if (!elems.ssid) | |
1931 | return; | |
1932 | ||
1933 | if (elems.ds_params && elems.ds_params_len == 1) | |
1934 | channel = elems.ds_params[0]; | |
1935 | else | |
1936 | channel = rx_status->channel; | |
1937 | ||
cffdd30d JL |
1938 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel, |
1939 | elems.ssid, elems.ssid_len); | |
f0706e82 | 1940 | if (!bss) { |
cffdd30d JL |
1941 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel, |
1942 | elems.ssid, elems.ssid_len); | |
f0706e82 JB |
1943 | if (!bss) |
1944 | return; | |
1945 | } else { | |
1946 | #if 0 | |
1947 | /* TODO: order by RSSI? */ | |
1948 | spin_lock_bh(&local->sta_bss_lock); | |
1949 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1950 | spin_unlock_bh(&local->sta_bss_lock); | |
1951 | #endif | |
1952 | } | |
1953 | ||
1954 | if (bss->probe_resp && beacon) { | |
1955 | /* Do not allow beacon to override data from Probe Response. */ | |
1956 | ieee80211_rx_bss_put(dev, bss); | |
1957 | return; | |
1958 | } | |
1959 | ||
5628221c DD |
1960 | /* save the ERP value so that it is available at association time */ |
1961 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1962 | bss->erp_value = elems.erp_info[0]; | |
1963 | bss->has_erp_value = 1; | |
1964 | } | |
1965 | ||
f0706e82 JB |
1966 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1967 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
f0706e82 JB |
1968 | |
1969 | bss->supp_rates_len = 0; | |
1970 | if (elems.supp_rates) { | |
1971 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1972 | if (clen > elems.supp_rates_len) | |
1973 | clen = elems.supp_rates_len; | |
1974 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1975 | clen); | |
1976 | bss->supp_rates_len += clen; | |
1977 | } | |
1978 | if (elems.ext_supp_rates) { | |
1979 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1980 | if (clen > elems.ext_supp_rates_len) | |
1981 | clen = elems.ext_supp_rates_len; | |
1982 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1983 | elems.ext_supp_rates, clen); | |
1984 | bss->supp_rates_len += clen; | |
1985 | } | |
1986 | ||
1987 | if (elems.wpa && | |
1988 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1989 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1990 | kfree(bss->wpa_ie); | |
1991 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1992 | if (bss->wpa_ie) { | |
1993 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1994 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1995 | } else | |
1996 | bss->wpa_ie_len = 0; | |
1997 | } else if (!elems.wpa && bss->wpa_ie) { | |
1998 | kfree(bss->wpa_ie); | |
1999 | bss->wpa_ie = NULL; | |
2000 | bss->wpa_ie_len = 0; | |
2001 | } | |
2002 | ||
2003 | if (elems.rsn && | |
2004 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
2005 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
2006 | kfree(bss->rsn_ie); | |
2007 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
2008 | if (bss->rsn_ie) { | |
2009 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
2010 | bss->rsn_ie_len = elems.rsn_len + 2; | |
2011 | } else | |
2012 | bss->rsn_ie_len = 0; | |
2013 | } else if (!elems.rsn && bss->rsn_ie) { | |
2014 | kfree(bss->rsn_ie); | |
2015 | bss->rsn_ie = NULL; | |
2016 | bss->rsn_ie_len = 0; | |
2017 | } | |
2018 | ||
2019 | if (elems.wmm_param && | |
2020 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
2021 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
2022 | kfree(bss->wmm_ie); | |
2023 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
2024 | if (bss->wmm_ie) { | |
2025 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
2026 | elems.wmm_param_len + 2); | |
2027 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
2028 | } else | |
2029 | bss->wmm_ie_len = 0; | |
2030 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
2031 | kfree(bss->wmm_ie); | |
2032 | bss->wmm_ie = NULL; | |
2033 | bss->wmm_ie_len = 0; | |
2034 | } | |
c7153508 RR |
2035 | if (elems.ht_cap_elem && |
2036 | (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len || | |
2037 | memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) { | |
2038 | kfree(bss->ht_ie); | |
2039 | bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC); | |
2040 | if (bss->ht_ie) { | |
2041 | memcpy(bss->ht_ie, elems.ht_cap_elem - 2, | |
2042 | elems.ht_cap_elem_len + 2); | |
2043 | bss->ht_ie_len = elems.ht_cap_elem_len + 2; | |
2044 | } else | |
2045 | bss->ht_ie_len = 0; | |
2046 | } else if (!elems.ht_cap_elem && bss->ht_ie) { | |
2047 | kfree(bss->ht_ie); | |
2048 | bss->ht_ie = NULL; | |
2049 | bss->ht_ie_len = 0; | |
2050 | } | |
f0706e82 JB |
2051 | |
2052 | bss->hw_mode = rx_status->phymode; | |
f0706e82 JB |
2053 | bss->freq = rx_status->freq; |
2054 | if (channel != rx_status->channel && | |
2055 | (bss->hw_mode == MODE_IEEE80211G || | |
2056 | bss->hw_mode == MODE_IEEE80211B) && | |
2057 | channel >= 1 && channel <= 14) { | |
2058 | static const int freq_list[] = { | |
2059 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
2060 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
2061 | }; | |
2062 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
2063 | * channels, so map the channel into frequency. */ | |
2064 | bss->freq = freq_list[channel - 1]; | |
2065 | } | |
2066 | bss->timestamp = timestamp; | |
2067 | bss->last_update = jiffies; | |
2068 | bss->rssi = rx_status->ssi; | |
2069 | bss->signal = rx_status->signal; | |
2070 | bss->noise = rx_status->noise; | |
2071 | if (!beacon) | |
2072 | bss->probe_resp++; | |
2073 | ieee80211_rx_bss_put(dev, bss); | |
2074 | } | |
2075 | ||
2076 | ||
2077 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
2078 | struct ieee80211_mgmt *mgmt, | |
2079 | size_t len, | |
2080 | struct ieee80211_rx_status *rx_status) | |
2081 | { | |
2082 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
2083 | } | |
2084 | ||
2085 | ||
2086 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
2087 | struct ieee80211_mgmt *mgmt, | |
2088 | size_t len, | |
2089 | struct ieee80211_rx_status *rx_status) | |
2090 | { | |
f0706e82 JB |
2091 | struct ieee80211_sub_if_data *sdata; |
2092 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
2093 | size_t baselen; |
2094 | struct ieee802_11_elems elems; | |
d3c990fb RR |
2095 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
2096 | struct ieee80211_conf *conf = &local->hw.conf; | |
471b3efd | 2097 | u32 changed = 0; |
f0706e82 JB |
2098 | |
2099 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
2100 | ||
2101 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
51fb61e7 | 2102 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2103 | return; |
2104 | ifsta = &sdata->u.sta; | |
2105 | ||
d6f2da5b | 2106 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
2107 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
2108 | return; | |
2109 | ||
2110 | /* Process beacon from the current BSS */ | |
2111 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
2112 | if (baselen > len) | |
2113 | return; | |
2114 | ||
67a4cce4 | 2115 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
f0706e82 | 2116 | |
5628221c | 2117 | if (elems.erp_info && elems.erp_info_len >= 1) |
471b3efd | 2118 | changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]); |
f0706e82 | 2119 | |
d3c990fb RR |
2120 | if (elems.ht_cap_elem && elems.ht_info_elem && |
2121 | elems.wmm_param && local->ops->conf_ht && | |
2122 | conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { | |
2123 | struct ieee80211_ht_bss_info bss_info; | |
2124 | ||
2125 | ieee80211_ht_addt_info_ie_to_ht_bss_info( | |
2126 | (struct ieee80211_ht_addt_info *) | |
2127 | elems.ht_info_elem, &bss_info); | |
2128 | /* check if AP changed bss inforamation */ | |
2129 | if ((conf->ht_bss_conf.primary_channel != | |
2130 | bss_info.primary_channel) || | |
2131 | (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) || | |
2132 | (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode)) | |
2133 | ieee80211_hw_config_ht(local, 1, &conf->ht_conf, | |
2134 | &bss_info); | |
2135 | } | |
2136 | ||
d6f2da5b | 2137 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
2138 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |
2139 | elems.wmm_param_len); | |
2140 | } | |
471b3efd JB |
2141 | |
2142 | ieee80211_bss_info_change_notify(sdata, changed); | |
f0706e82 JB |
2143 | } |
2144 | ||
2145 | ||
2146 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
2147 | struct ieee80211_if_sta *ifsta, | |
2148 | struct ieee80211_mgmt *mgmt, | |
2149 | size_t len, | |
2150 | struct ieee80211_rx_status *rx_status) | |
2151 | { | |
2152 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2153 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2154 | int tx_last_beacon; | |
2155 | struct sk_buff *skb; | |
2156 | struct ieee80211_mgmt *resp; | |
2157 | u8 *pos, *end; | |
0795af57 JP |
2158 | DECLARE_MAC_BUF(mac); |
2159 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2160 | DECLARE_MAC_BUF(mac2); | |
2161 | DECLARE_MAC_BUF(mac3); | |
2162 | #endif | |
f0706e82 | 2163 | |
51fb61e7 | 2164 | if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS || |
f0706e82 JB |
2165 | ifsta->state != IEEE80211_IBSS_JOINED || |
2166 | len < 24 + 2 || !ifsta->probe_resp) | |
2167 | return; | |
2168 | ||
2169 | if (local->ops->tx_last_beacon) | |
2170 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
2171 | else | |
2172 | tx_last_beacon = 1; | |
2173 | ||
2174 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2175 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
2176 | "%s (tx_last_beacon=%d)\n", | |
2177 | dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), | |
2178 | print_mac(mac3, mgmt->bssid), tx_last_beacon); | |
f0706e82 JB |
2179 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2180 | ||
2181 | if (!tx_last_beacon) | |
2182 | return; | |
2183 | ||
2184 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
2185 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
2186 | return; | |
2187 | ||
2188 | end = ((u8 *) mgmt) + len; | |
2189 | pos = mgmt->u.probe_req.variable; | |
2190 | if (pos[0] != WLAN_EID_SSID || | |
2191 | pos + 2 + pos[1] > end) { | |
2192 | if (net_ratelimit()) { | |
2193 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0795af57 JP |
2194 | "from %s\n", |
2195 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
2196 | } |
2197 | return; | |
2198 | } | |
2199 | if (pos[1] != 0 && | |
2200 | (pos[1] != ifsta->ssid_len || | |
2201 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
2202 | /* Ignore ProbeReq for foreign SSID */ | |
2203 | return; | |
2204 | } | |
2205 | ||
2206 | /* Reply with ProbeResp */ | |
0ec0b7ac | 2207 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
2208 | if (!skb) |
2209 | return; | |
2210 | ||
2211 | resp = (struct ieee80211_mgmt *) skb->data; | |
2212 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
2213 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2214 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
2215 | dev->name, print_mac(mac, resp->da)); | |
f0706e82 JB |
2216 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2217 | ieee80211_sta_tx(dev, skb, 0); | |
2218 | } | |
2219 | ||
4e20cb29 JB |
2220 | static void ieee80211_rx_mgmt_action(struct net_device *dev, |
2221 | struct ieee80211_if_sta *ifsta, | |
2222 | struct ieee80211_mgmt *mgmt, | |
2223 | size_t len) | |
9f985b0e RR |
2224 | { |
2225 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
2226 | return; | |
2227 | ||
2228 | switch (mgmt->u.action.category) { | |
2229 | case WLAN_CATEGORY_BACK: | |
2230 | switch (mgmt->u.action.u.addba_req.action_code) { | |
2231 | case WLAN_ACTION_ADDBA_REQ: | |
2232 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2233 | sizeof(mgmt->u.action.u.addba_req))) | |
2234 | break; | |
2235 | ieee80211_sta_process_addba_request(dev, mgmt, len); | |
2236 | break; | |
688b88a4 RR |
2237 | case WLAN_ACTION_DELBA: |
2238 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2239 | sizeof(mgmt->u.action.u.delba))) | |
2240 | break; | |
2241 | ieee80211_sta_process_delba(dev, mgmt, len); | |
2242 | break; | |
9f985b0e RR |
2243 | default: |
2244 | if (net_ratelimit()) | |
688b88a4 | 2245 | printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n", |
9f985b0e RR |
2246 | dev->name); |
2247 | break; | |
2248 | } | |
2249 | break; | |
2250 | default: | |
2251 | break; | |
2252 | } | |
2253 | } | |
f0706e82 JB |
2254 | |
2255 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
2256 | struct ieee80211_rx_status *rx_status) | |
2257 | { | |
2258 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2259 | struct ieee80211_sub_if_data *sdata; | |
2260 | struct ieee80211_if_sta *ifsta; | |
2261 | struct ieee80211_mgmt *mgmt; | |
2262 | u16 fc; | |
2263 | ||
2264 | if (skb->len < 24) | |
2265 | goto fail; | |
2266 | ||
2267 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2268 | ifsta = &sdata->u.sta; | |
2269 | ||
2270 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2271 | fc = le16_to_cpu(mgmt->frame_control); | |
2272 | ||
2273 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2274 | case IEEE80211_STYPE_PROBE_REQ: | |
2275 | case IEEE80211_STYPE_PROBE_RESP: | |
2276 | case IEEE80211_STYPE_BEACON: | |
2277 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
2278 | case IEEE80211_STYPE_AUTH: | |
2279 | case IEEE80211_STYPE_ASSOC_RESP: | |
2280 | case IEEE80211_STYPE_REASSOC_RESP: | |
2281 | case IEEE80211_STYPE_DEAUTH: | |
2282 | case IEEE80211_STYPE_DISASSOC: | |
9f985b0e | 2283 | case IEEE80211_STYPE_ACTION: |
f0706e82 JB |
2284 | skb_queue_tail(&ifsta->skb_queue, skb); |
2285 | queue_work(local->hw.workqueue, &ifsta->work); | |
2286 | return; | |
2287 | default: | |
2288 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
2289 | "stype=%d\n", dev->name, | |
2290 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
2291 | break; | |
2292 | } | |
2293 | ||
2294 | fail: | |
2295 | kfree_skb(skb); | |
2296 | } | |
2297 | ||
2298 | ||
2299 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
2300 | struct sk_buff *skb) | |
2301 | { | |
2302 | struct ieee80211_rx_status *rx_status; | |
2303 | struct ieee80211_sub_if_data *sdata; | |
2304 | struct ieee80211_if_sta *ifsta; | |
2305 | struct ieee80211_mgmt *mgmt; | |
2306 | u16 fc; | |
2307 | ||
2308 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2309 | ifsta = &sdata->u.sta; | |
2310 | ||
2311 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
2312 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2313 | fc = le16_to_cpu(mgmt->frame_control); | |
2314 | ||
2315 | switch (fc & IEEE80211_FCTL_STYPE) { | |
2316 | case IEEE80211_STYPE_PROBE_REQ: | |
2317 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
2318 | rx_status); | |
2319 | break; | |
2320 | case IEEE80211_STYPE_PROBE_RESP: | |
2321 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
2322 | break; | |
2323 | case IEEE80211_STYPE_BEACON: | |
2324 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
2325 | break; | |
2326 | case IEEE80211_STYPE_AUTH: | |
2327 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
2328 | break; | |
2329 | case IEEE80211_STYPE_ASSOC_RESP: | |
471b3efd | 2330 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0); |
f0706e82 JB |
2331 | break; |
2332 | case IEEE80211_STYPE_REASSOC_RESP: | |
471b3efd | 2333 | ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1); |
f0706e82 JB |
2334 | break; |
2335 | case IEEE80211_STYPE_DEAUTH: | |
2336 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
2337 | break; | |
2338 | case IEEE80211_STYPE_DISASSOC: | |
2339 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
2340 | break; | |
9f985b0e RR |
2341 | case IEEE80211_STYPE_ACTION: |
2342 | ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len); | |
2343 | break; | |
f0706e82 JB |
2344 | } |
2345 | ||
2346 | kfree_skb(skb); | |
2347 | } | |
2348 | ||
2349 | ||
ece8eddd ZY |
2350 | ieee80211_txrx_result |
2351 | ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
2352 | struct ieee80211_rx_status *rx_status) | |
f0706e82 JB |
2353 | { |
2354 | struct ieee80211_mgmt *mgmt; | |
2355 | u16 fc; | |
2356 | ||
ece8eddd ZY |
2357 | if (skb->len < 2) |
2358 | return TXRX_DROP; | |
f0706e82 JB |
2359 | |
2360 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
2361 | fc = le16_to_cpu(mgmt->frame_control); | |
2362 | ||
ece8eddd ZY |
2363 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) |
2364 | return TXRX_CONTINUE; | |
2365 | ||
2366 | if (skb->len < 24) | |
2367 | return TXRX_DROP; | |
2368 | ||
f0706e82 JB |
2369 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { |
2370 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
2371 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
2372 | skb->len, rx_status); | |
ece8eddd ZY |
2373 | dev_kfree_skb(skb); |
2374 | return TXRX_QUEUED; | |
f0706e82 JB |
2375 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { |
2376 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
2377 | rx_status); | |
ece8eddd ZY |
2378 | dev_kfree_skb(skb); |
2379 | return TXRX_QUEUED; | |
f0706e82 JB |
2380 | } |
2381 | } | |
ece8eddd | 2382 | return TXRX_CONTINUE; |
f0706e82 JB |
2383 | } |
2384 | ||
2385 | ||
2386 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
2387 | { | |
2388 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2389 | int active = 0; | |
2390 | struct sta_info *sta; | |
2391 | ||
be8755e1 | 2392 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
2393 | list_for_each_entry(sta, &local->sta_list, list) { |
2394 | if (sta->dev == dev && | |
2395 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
2396 | jiffies)) { | |
2397 | active++; | |
2398 | break; | |
2399 | } | |
2400 | } | |
be8755e1 | 2401 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
2402 | |
2403 | return active; | |
2404 | } | |
2405 | ||
2406 | ||
2407 | static void ieee80211_sta_expire(struct net_device *dev) | |
2408 | { | |
2409 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2410 | struct sta_info *sta, *tmp; | |
be8755e1 | 2411 | LIST_HEAD(tmp_list); |
0795af57 | 2412 | DECLARE_MAC_BUF(mac); |
f0706e82 | 2413 | |
be8755e1 | 2414 | write_lock_bh(&local->sta_lock); |
f0706e82 JB |
2415 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
2416 | if (time_after(jiffies, sta->last_rx + | |
2417 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
0795af57 JP |
2418 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
2419 | dev->name, print_mac(mac, sta->addr)); | |
be8755e1 MW |
2420 | __sta_info_get(sta); |
2421 | sta_info_remove(sta); | |
2422 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 2423 | } |
be8755e1 MW |
2424 | write_unlock_bh(&local->sta_lock); |
2425 | ||
2426 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
2427 | sta_info_free(sta); | |
2428 | sta_info_put(sta); | |
2429 | } | |
f0706e82 JB |
2430 | } |
2431 | ||
2432 | ||
2433 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
2434 | struct ieee80211_if_sta *ifsta) | |
2435 | { | |
2436 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2437 | ||
2438 | ieee80211_sta_expire(dev); | |
2439 | if (ieee80211_sta_active_ibss(dev)) | |
2440 | return; | |
2441 | ||
2442 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
2443 | "IBSS networks with same SSID (merge)\n", dev->name); | |
2444 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
2445 | } | |
2446 | ||
2447 | ||
2448 | void ieee80211_sta_timer(unsigned long data) | |
2449 | { | |
2450 | struct ieee80211_sub_if_data *sdata = | |
2451 | (struct ieee80211_sub_if_data *) data; | |
2452 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2453 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
2454 | ||
2455 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2456 | queue_work(local->hw.workqueue, &ifsta->work); | |
2457 | } | |
2458 | ||
2459 | ||
2460 | void ieee80211_sta_work(struct work_struct *work) | |
2461 | { | |
2462 | struct ieee80211_sub_if_data *sdata = | |
2463 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
2464 | struct net_device *dev = sdata->dev; | |
2465 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2466 | struct ieee80211_if_sta *ifsta; | |
2467 | struct sk_buff *skb; | |
2468 | ||
2469 | if (!netif_running(dev)) | |
2470 | return; | |
2471 | ||
ece8eddd | 2472 | if (local->sta_sw_scanning || local->sta_hw_scanning) |
f0706e82 JB |
2473 | return; |
2474 | ||
51fb61e7 JB |
2475 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
2476 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) { | |
f0706e82 | 2477 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " |
51fb61e7 | 2478 | "(type=%d)\n", dev->name, sdata->vif.type); |
f0706e82 JB |
2479 | return; |
2480 | } | |
2481 | ifsta = &sdata->u.sta; | |
2482 | ||
2483 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
2484 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
2485 | ||
2486 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
2487 | ifsta->state != IEEE80211_ASSOCIATE && | |
2488 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
a0af5f14 HS |
2489 | if (ifsta->scan_ssid_len) |
2490 | ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len); | |
2491 | else | |
2492 | ieee80211_sta_start_scan(dev, NULL, 0); | |
f0706e82 JB |
2493 | return; |
2494 | } | |
2495 | ||
2496 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
2497 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
2498 | return; | |
2499 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2500 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2501 | return; | |
2502 | ||
2503 | switch (ifsta->state) { | |
2504 | case IEEE80211_DISABLED: | |
2505 | break; | |
2506 | case IEEE80211_AUTHENTICATE: | |
2507 | ieee80211_authenticate(dev, ifsta); | |
2508 | break; | |
2509 | case IEEE80211_ASSOCIATE: | |
2510 | ieee80211_associate(dev, ifsta); | |
2511 | break; | |
2512 | case IEEE80211_ASSOCIATED: | |
2513 | ieee80211_associated(dev, ifsta); | |
2514 | break; | |
2515 | case IEEE80211_IBSS_SEARCH: | |
2516 | ieee80211_sta_find_ibss(dev, ifsta); | |
2517 | break; | |
2518 | case IEEE80211_IBSS_JOINED: | |
2519 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2520 | break; | |
2521 | default: | |
2522 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2523 | ifsta->state); | |
2524 | break; | |
2525 | } | |
2526 | ||
2527 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2528 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2529 | "mixed-cell disabled - disassociate\n", dev->name); | |
2530 | ||
2531 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2532 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | ||
2537 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2538 | struct ieee80211_if_sta *ifsta) | |
2539 | { | |
2540 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2541 | ||
2542 | if (local->ops->reset_tsf) { | |
2543 | /* Reset own TSF to allow time synchronization work. */ | |
2544 | local->ops->reset_tsf(local_to_hw(local)); | |
2545 | } | |
2546 | ||
2547 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2548 | ||
2549 | ||
2550 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2551 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2552 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2553 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2554 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2555 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2556 | else | |
2557 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2558 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2559 | ifsta->auth_alg); | |
2560 | ifsta->auth_transaction = -1; | |
d6f2da5b JS |
2561 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
2562 | ifsta->auth_tries = ifsta->assoc_tries = 0; | |
f0706e82 JB |
2563 | netif_carrier_off(dev); |
2564 | } | |
2565 | ||
2566 | ||
2567 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2568 | struct ieee80211_if_sta *ifsta) | |
2569 | { | |
2570 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2571 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2572 | ||
51fb61e7 | 2573 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
2574 | return; |
2575 | ||
d6f2da5b JS |
2576 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2577 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2578 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2579 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
2580 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2581 | queue_work(local->hw.workqueue, &ifsta->work); | |
2582 | } | |
2583 | } | |
2584 | ||
2585 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2586 | const char *ssid, int ssid_len) | |
2587 | { | |
2588 | int tmp, hidden_ssid; | |
2589 | ||
48225709 MW |
2590 | if (ssid_len == ifsta->ssid_len && |
2591 | !memcmp(ifsta->ssid, ssid, ssid_len)) | |
f0706e82 JB |
2592 | return 1; |
2593 | ||
d6f2da5b | 2594 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2595 | return 0; |
2596 | ||
2597 | hidden_ssid = 1; | |
2598 | tmp = ssid_len; | |
2599 | while (tmp--) { | |
2600 | if (ssid[tmp] != '\0') { | |
2601 | hidden_ssid = 0; | |
2602 | break; | |
2603 | } | |
2604 | } | |
2605 | ||
2606 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2607 | return 1; | |
2608 | ||
2609 | if (ssid_len == 1 && ssid[0] == ' ') | |
2610 | return 1; | |
2611 | ||
2612 | return 0; | |
2613 | } | |
2614 | ||
2615 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2616 | struct ieee80211_if_sta *ifsta) | |
2617 | { | |
2618 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2619 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2620 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2621 | int top_rssi = 0, freq; | |
2622 | ||
d6f2da5b JS |
2623 | if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2624 | IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) { | |
f0706e82 | 2625 | ifsta->state = IEEE80211_AUTHENTICATE; |
f0706e82 JB |
2626 | ieee80211_sta_reset_auth(dev, ifsta); |
2627 | return 0; | |
2628 | } | |
2629 | ||
2630 | spin_lock_bh(&local->sta_bss_lock); | |
2631 | freq = local->oper_channel->freq; | |
2632 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2633 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2634 | continue; | |
2635 | ||
2636 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2637 | !!sdata->default_key) | |
2638 | continue; | |
2639 | ||
d6f2da5b JS |
2640 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2641 | bss->freq != freq) | |
f0706e82 JB |
2642 | continue; |
2643 | ||
d6f2da5b | 2644 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
2645 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
2646 | continue; | |
2647 | ||
d6f2da5b | 2648 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
2649 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
2650 | continue; | |
2651 | ||
2652 | if (!selected || top_rssi < bss->rssi) { | |
2653 | selected = bss; | |
2654 | top_rssi = bss->rssi; | |
2655 | } | |
2656 | } | |
2657 | if (selected) | |
2658 | atomic_inc(&selected->users); | |
2659 | spin_unlock_bh(&local->sta_bss_lock); | |
2660 | ||
2661 | if (selected) { | |
2662 | ieee80211_set_channel(local, -1, selected->freq); | |
d6f2da5b | 2663 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f0706e82 JB |
2664 | ieee80211_sta_set_ssid(dev, selected->ssid, |
2665 | selected->ssid_len); | |
2666 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2667 | ieee80211_rx_bss_put(dev, selected); | |
2668 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2669 | ieee80211_sta_reset_auth(dev, ifsta); |
2670 | return 0; | |
2671 | } else { | |
2672 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
d6f2da5b | 2673 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
b9bf1e60 JL |
2674 | ieee80211_sta_start_scan(dev, NULL, 0); |
2675 | else | |
2676 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
2677 | ifsta->ssid_len); | |
f0706e82 JB |
2678 | ifsta->state = IEEE80211_AUTHENTICATE; |
2679 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2680 | } else | |
2681 | ifsta->state = IEEE80211_DISABLED; | |
2682 | } | |
f0706e82 JB |
2683 | return -1; |
2684 | } | |
2685 | ||
2686 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2687 | struct ieee80211_if_sta *ifsta, | |
2688 | struct ieee80211_sta_bss *bss) | |
2689 | { | |
2690 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2691 | int res, rates, i, j; | |
2692 | struct sk_buff *skb; | |
2693 | struct ieee80211_mgmt *mgmt; | |
2694 | struct ieee80211_tx_control control; | |
f0706e82 | 2695 | struct ieee80211_hw_mode *mode; |
1abbe498 | 2696 | struct rate_selection ratesel; |
f0706e82 JB |
2697 | u8 *pos; |
2698 | struct ieee80211_sub_if_data *sdata; | |
2699 | ||
2700 | /* Remove possible STA entries from other IBSS networks. */ | |
2701 | sta_info_flush(local, NULL); | |
2702 | ||
2703 | if (local->ops->reset_tsf) { | |
2704 | /* Reset own TSF to allow time synchronization work. */ | |
2705 | local->ops->reset_tsf(local_to_hw(local)); | |
2706 | } | |
2707 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2708 | res = ieee80211_if_config(dev); | |
2709 | if (res) | |
2710 | return res; | |
2711 | ||
2712 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2713 | ||
2714 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2715 | sdata->drop_unencrypted = bss->capability & | |
2716 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2717 | ||
2718 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2719 | ||
2720 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2721 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2722 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2723 | local->hw.conf.freq); | |
2724 | return -1; | |
2725 | } | |
2726 | ||
2727 | /* Set beacon template based on scan results */ | |
2728 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2729 | do { | |
2730 | if (!skb) | |
2731 | break; | |
2732 | ||
2733 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2734 | ||
2735 | mgmt = (struct ieee80211_mgmt *) | |
2736 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2737 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2738 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2739 | IEEE80211_STYPE_BEACON); | |
2740 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2741 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2742 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2743 | mgmt->u.beacon.beacon_int = | |
2744 | cpu_to_le16(local->hw.conf.beacon_int); | |
2745 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2746 | ||
2747 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2748 | *pos++ = WLAN_EID_SSID; | |
2749 | *pos++ = ifsta->ssid_len; | |
2750 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2751 | ||
2752 | rates = bss->supp_rates_len; | |
2753 | if (rates > 8) | |
2754 | rates = 8; | |
2755 | pos = skb_put(skb, 2 + rates); | |
2756 | *pos++ = WLAN_EID_SUPP_RATES; | |
2757 | *pos++ = rates; | |
2758 | memcpy(pos, bss->supp_rates, rates); | |
2759 | ||
2760 | pos = skb_put(skb, 2 + 1); | |
2761 | *pos++ = WLAN_EID_DS_PARAMS; | |
2762 | *pos++ = 1; | |
2763 | *pos++ = bss->channel; | |
2764 | ||
2765 | pos = skb_put(skb, 2 + 2); | |
2766 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2767 | *pos++ = 2; | |
2768 | /* FIX: set ATIM window based on scan results */ | |
2769 | *pos++ = 0; | |
2770 | *pos++ = 0; | |
2771 | ||
2772 | if (bss->supp_rates_len > 8) { | |
2773 | rates = bss->supp_rates_len - 8; | |
2774 | pos = skb_put(skb, 2 + rates); | |
2775 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2776 | *pos++ = rates; | |
2777 | memcpy(pos, &bss->supp_rates[8], rates); | |
2778 | } | |
2779 | ||
2780 | memset(&control, 0, sizeof(control)); | |
1abbe498 MN |
2781 | rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel); |
2782 | if (!ratesel.rate) { | |
f0706e82 JB |
2783 | printk(KERN_DEBUG "%s: Failed to determine TX rate " |
2784 | "for IBSS beacon\n", dev->name); | |
2785 | break; | |
2786 | } | |
0f7054e3 | 2787 | control.vif = &sdata->vif; |
13262ffd | 2788 | control.tx_rate = |
471b3efd | 2789 | (sdata->bss_conf.use_short_preamble && |
1abbe498 MN |
2790 | (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ? |
2791 | ratesel.rate->val2 : ratesel.rate->val; | |
f0706e82 JB |
2792 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
2793 | control.power_level = local->hw.conf.power_level; | |
2794 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2795 | control.retry_limit = 1; | |
2796 | ||
2797 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2798 | if (ifsta->probe_resp) { | |
2799 | mgmt = (struct ieee80211_mgmt *) | |
2800 | ifsta->probe_resp->data; | |
2801 | mgmt->frame_control = | |
2802 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2803 | IEEE80211_STYPE_PROBE_RESP); | |
2804 | } else { | |
2805 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2806 | "template for IBSS\n", dev->name); | |
2807 | } | |
2808 | ||
2809 | if (local->ops->beacon_update && | |
2810 | local->ops->beacon_update(local_to_hw(local), | |
2811 | skb, &control) == 0) { | |
2812 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2813 | "template based on scan results\n", dev->name); | |
2814 | skb = NULL; | |
2815 | } | |
2816 | ||
2817 | rates = 0; | |
2818 | mode = local->oper_hw_mode; | |
2819 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2820 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
2821 | for (j = 0; j < mode->num_rates; j++) |
2822 | if (mode->rates[j].rate == bitrate) | |
2823 | rates |= BIT(j); | |
2824 | } | |
2825 | ifsta->supp_rates_bits = rates; | |
2826 | } while (0); | |
2827 | ||
2828 | if (skb) { | |
2829 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2830 | "template\n", dev->name); | |
2831 | dev_kfree_skb(skb); | |
2832 | } | |
2833 | ||
2834 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2835 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2836 | ||
2837 | ieee80211_rx_bss_put(dev, bss); | |
2838 | ||
2839 | return res; | |
2840 | } | |
2841 | ||
2842 | ||
2843 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2844 | struct ieee80211_if_sta *ifsta) | |
2845 | { | |
2846 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2847 | struct ieee80211_sta_bss *bss; | |
cffdd30d | 2848 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
2849 | struct ieee80211_hw_mode *mode; |
2850 | u8 bssid[ETH_ALEN], *pos; | |
2851 | int i; | |
0795af57 | 2852 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
2853 | |
2854 | #if 0 | |
2855 | /* Easier testing, use fixed BSSID. */ | |
2856 | memset(bssid, 0xfe, ETH_ALEN); | |
2857 | #else | |
2858 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2859 | * own MAC address to make sure that devices that do not have proper | |
2860 | * random number generator get different BSSID. */ | |
2861 | get_random_bytes(bssid, ETH_ALEN); | |
2862 | for (i = 0; i < ETH_ALEN; i++) | |
2863 | bssid[i] ^= dev->dev_addr[i]; | |
2864 | bssid[0] &= ~0x01; | |
2865 | bssid[0] |= 0x02; | |
2866 | #endif | |
2867 | ||
0795af57 JP |
2868 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
2869 | dev->name, print_mac(mac, bssid)); | |
f0706e82 | 2870 | |
cffdd30d JL |
2871 | bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel, |
2872 | sdata->u.sta.ssid, sdata->u.sta.ssid_len); | |
f0706e82 JB |
2873 | if (!bss) |
2874 | return -ENOMEM; | |
2875 | ||
f0706e82 JB |
2876 | mode = local->oper_hw_mode; |
2877 | ||
2878 | if (local->hw.conf.beacon_int == 0) | |
2879 | local->hw.conf.beacon_int = 100; | |
2880 | bss->beacon_int = local->hw.conf.beacon_int; | |
2881 | bss->hw_mode = local->hw.conf.phymode; | |
f0706e82 JB |
2882 | bss->freq = local->hw.conf.freq; |
2883 | bss->last_update = jiffies; | |
2884 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2885 | if (sdata->default_key) { | |
2886 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2887 | } else | |
2888 | sdata->drop_unencrypted = 0; | |
2889 | bss->supp_rates_len = mode->num_rates; | |
2890 | pos = bss->supp_rates; | |
2891 | for (i = 0; i < mode->num_rates; i++) { | |
2892 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
2893 | *pos++ = (u8) (rate / 5); |
2894 | } | |
2895 | ||
2896 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2897 | } | |
2898 | ||
2899 | ||
2900 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2901 | struct ieee80211_if_sta *ifsta) | |
2902 | { | |
2903 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2904 | struct ieee80211_sta_bss *bss; | |
2905 | int found = 0; | |
2906 | u8 bssid[ETH_ALEN]; | |
2907 | int active_ibss; | |
0795af57 JP |
2908 | DECLARE_MAC_BUF(mac); |
2909 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
2910 | |
2911 | if (ifsta->ssid_len == 0) | |
2912 | return -EINVAL; | |
2913 | ||
2914 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2915 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2916 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2917 | dev->name, active_ibss); | |
2918 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2919 | spin_lock_bh(&local->sta_bss_lock); | |
2920 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2921 | if (ifsta->ssid_len != bss->ssid_len || | |
2922 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2923 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2924 | continue; | |
2925 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2926 | printk(KERN_DEBUG " bssid=%s found\n", |
2927 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
2928 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2929 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2930 | found = 1; | |
2931 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2932 | break; | |
2933 | } | |
2934 | spin_unlock_bh(&local->sta_bss_lock); | |
2935 | ||
2936 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2937 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " |
2938 | "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid)); | |
f0706e82 JB |
2939 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2940 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
cffdd30d JL |
2941 | (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel, |
2942 | ifsta->ssid, ifsta->ssid_len))) { | |
0795af57 | 2943 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 2944 | " based on configured SSID\n", |
0795af57 | 2945 | dev->name, print_mac(mac, bssid)); |
f0706e82 JB |
2946 | return ieee80211_sta_join_ibss(dev, ifsta, bss); |
2947 | } | |
2948 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2949 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2950 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2951 | ||
2952 | /* Selected IBSS not found in current scan results - try to scan */ | |
2953 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2954 | !ieee80211_sta_active_ibss(dev)) { | |
2955 | mod_timer(&ifsta->timer, jiffies + | |
2956 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2957 | } else if (time_after(jiffies, local->last_scan_completed + | |
2958 | IEEE80211_SCAN_INTERVAL)) { | |
2959 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2960 | "join\n", dev->name); | |
2961 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2962 | ifsta->ssid_len); | |
2963 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2964 | int interval = IEEE80211_SCAN_INTERVAL; | |
2965 | ||
2966 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2967 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2968 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
f0706e82 JB |
2969 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) |
2970 | return ieee80211_sta_create_ibss(dev, ifsta); | |
d6f2da5b | 2971 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
f0706e82 JB |
2972 | printk(KERN_DEBUG "%s: IBSS not allowed on the" |
2973 | " configured channel %d (%d MHz)\n", | |
2974 | dev->name, local->hw.conf.channel, | |
2975 | local->hw.conf.freq); | |
2976 | } | |
2977 | ||
2978 | /* No IBSS found - decrease scan interval and continue | |
2979 | * scanning. */ | |
2980 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2981 | } | |
2982 | ||
2983 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2984 | mod_timer(&ifsta->timer, jiffies + interval); | |
2985 | return 0; | |
2986 | } | |
2987 | ||
2988 | return 0; | |
2989 | } | |
2990 | ||
2991 | ||
2992 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2993 | { | |
2994 | struct ieee80211_sub_if_data *sdata; | |
2995 | struct ieee80211_if_sta *ifsta; | |
2996 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2997 | ||
2998 | if (len > IEEE80211_MAX_SSID_LEN) | |
2999 | return -EINVAL; | |
3000 | ||
3001 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
3002 | * not defined. */ | |
3003 | if (local->ops->conf_tx) { | |
3004 | struct ieee80211_tx_queue_params qparam; | |
3005 | int i; | |
3006 | ||
3007 | memset(&qparam, 0, sizeof(qparam)); | |
3008 | /* TODO: are these ok defaults for all hw_modes? */ | |
3009 | qparam.aifs = 2; | |
3010 | qparam.cw_min = | |
3011 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
3012 | qparam.cw_max = 1023; | |
3013 | qparam.burst_time = 0; | |
3014 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
3015 | { | |
3016 | local->ops->conf_tx(local_to_hw(local), | |
3017 | i + IEEE80211_TX_QUEUE_DATA0, | |
3018 | &qparam); | |
3019 | } | |
3020 | /* IBSS uses different parameters for Beacon sending */ | |
3021 | qparam.cw_min++; | |
3022 | qparam.cw_min *= 2; | |
3023 | qparam.cw_min--; | |
3024 | local->ops->conf_tx(local_to_hw(local), | |
3025 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
3026 | } | |
3027 | ||
3028 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3029 | ifsta = &sdata->u.sta; | |
3030 | ||
3031 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
d6f2da5b | 3032 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
3033 | memcpy(ifsta->ssid, ssid, len); |
3034 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
3035 | ifsta->ssid_len = len; | |
3036 | ||
d6f2da5b JS |
3037 | if (len) |
3038 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
3039 | else | |
3040 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
51fb61e7 | 3041 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
d6f2da5b | 3042 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { |
f0706e82 JB |
3043 | ifsta->ibss_join_req = jiffies; |
3044 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
3045 | return ieee80211_sta_find_ibss(dev, ifsta); | |
3046 | } | |
3047 | return 0; | |
3048 | } | |
3049 | ||
3050 | ||
3051 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
3052 | { | |
3053 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3054 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3055 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
3056 | *len = ifsta->ssid_len; | |
3057 | return 0; | |
3058 | } | |
3059 | ||
3060 | ||
3061 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
3062 | { | |
3063 | struct ieee80211_sub_if_data *sdata; | |
3064 | struct ieee80211_if_sta *ifsta; | |
3065 | int res; | |
3066 | ||
3067 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3068 | ifsta = &sdata->u.sta; | |
3069 | ||
3070 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
3071 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
3072 | res = ieee80211_if_config(dev); | |
3073 | if (res) { | |
3074 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
3075 | "the low-level driver\n", dev->name); | |
3076 | return res; | |
3077 | } | |
3078 | } | |
3079 | ||
d6f2da5b JS |
3080 | if (is_valid_ether_addr(bssid)) |
3081 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 3082 | else |
d6f2da5b JS |
3083 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
3084 | ||
f0706e82 JB |
3085 | return 0; |
3086 | } | |
3087 | ||
3088 | ||
3089 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
3090 | struct ieee80211_sub_if_data *sdata, | |
3091 | int powersave) | |
3092 | { | |
3093 | struct sk_buff *skb; | |
3094 | struct ieee80211_hdr *nullfunc; | |
3095 | u16 fc; | |
3096 | ||
3097 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
3098 | if (!skb) { | |
3099 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
3100 | "frame\n", sdata->dev->name); | |
3101 | return; | |
3102 | } | |
3103 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3104 | ||
3105 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
3106 | memset(nullfunc, 0, 24); | |
3107 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
3108 | IEEE80211_FCTL_TODS; | |
3109 | if (powersave) | |
3110 | fc |= IEEE80211_FCTL_PM; | |
3111 | nullfunc->frame_control = cpu_to_le16(fc); | |
3112 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
3113 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
3114 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
3115 | ||
3116 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
3117 | } | |
3118 | ||
3119 | ||
3120 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
3121 | { | |
3122 | struct ieee80211_local *local = hw_to_local(hw); | |
3123 | struct net_device *dev = local->scan_dev; | |
3124 | struct ieee80211_sub_if_data *sdata; | |
3125 | union iwreq_data wrqu; | |
3126 | ||
3127 | local->last_scan_completed = jiffies; | |
ece8eddd ZY |
3128 | memset(&wrqu, 0, sizeof(wrqu)); |
3129 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
f0706e82 | 3130 | |
ece8eddd ZY |
3131 | if (local->sta_hw_scanning) { |
3132 | local->sta_hw_scanning = 0; | |
3133 | goto done; | |
3134 | } | |
3135 | ||
3136 | local->sta_sw_scanning = 0; | |
f0706e82 | 3137 | if (ieee80211_hw_config(local)) |
4b50e388 | 3138 | printk(KERN_DEBUG "%s: failed to restore operational " |
f0706e82 JB |
3139 | "channel after scan\n", dev->name); |
3140 | ||
4150c572 JB |
3141 | |
3142 | netif_tx_lock_bh(local->mdev); | |
3143 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; | |
3144 | local->ops->configure_filter(local_to_hw(local), | |
3145 | FIF_BCN_PRBRESP_PROMISC, | |
3146 | &local->filter_flags, | |
3147 | local->mdev->mc_count, | |
3148 | local->mdev->mc_list); | |
3149 | ||
3150 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 | 3151 | |
79010420 JB |
3152 | rcu_read_lock(); |
3153 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3154 | |
3155 | /* No need to wake the master device. */ | |
3156 | if (sdata->dev == local->mdev) | |
3157 | continue; | |
3158 | ||
51fb61e7 | 3159 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA) { |
d6f2da5b | 3160 | if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
3161 | ieee80211_send_nullfunc(local, sdata, 0); |
3162 | ieee80211_sta_timer((unsigned long)sdata); | |
3163 | } | |
14042cbe | 3164 | |
f0706e82 JB |
3165 | netif_wake_queue(sdata->dev); |
3166 | } | |
79010420 | 3167 | rcu_read_unlock(); |
f0706e82 | 3168 | |
ece8eddd | 3169 | done: |
f0706e82 | 3170 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
51fb61e7 | 3171 | if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { |
f0706e82 | 3172 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; |
d6f2da5b | 3173 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
f0706e82 JB |
3174 | (!ifsta->state == IEEE80211_IBSS_JOINED && |
3175 | !ieee80211_sta_active_ibss(dev))) | |
3176 | ieee80211_sta_find_ibss(dev, ifsta); | |
3177 | } | |
3178 | } | |
3179 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
3180 | ||
3181 | void ieee80211_sta_scan_work(struct work_struct *work) | |
3182 | { | |
3183 | struct ieee80211_local *local = | |
3184 | container_of(work, struct ieee80211_local, scan_work.work); | |
3185 | struct net_device *dev = local->scan_dev; | |
3186 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3187 | struct ieee80211_hw_mode *mode; | |
3188 | struct ieee80211_channel *chan; | |
3189 | int skip; | |
3190 | unsigned long next_delay = 0; | |
3191 | ||
ece8eddd | 3192 | if (!local->sta_sw_scanning) |
f0706e82 JB |
3193 | return; |
3194 | ||
3195 | switch (local->scan_state) { | |
3196 | case SCAN_SET_CHANNEL: | |
3197 | mode = local->scan_hw_mode; | |
3198 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
3199 | local->scan_channel_idx >= mode->num_channels) { | |
3200 | ieee80211_scan_completed(local_to_hw(local)); | |
3201 | return; | |
3202 | } | |
3203 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
3204 | chan = &mode->channels[local->scan_channel_idx]; | |
3205 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
51fb61e7 | 3206 | (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && |
f0706e82 JB |
3207 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || |
3208 | (local->hw_modes & local->enabled_modes & | |
3209 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
3210 | skip = 1; | |
3211 | ||
3212 | if (!skip) { | |
3213 | #if 0 | |
3214 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
3215 | dev->name, chan->chan, chan->freq); | |
3216 | #endif | |
3217 | ||
3218 | local->scan_channel = chan; | |
3219 | if (ieee80211_hw_config(local)) { | |
3220 | printk(KERN_DEBUG "%s: failed to set channel " | |
3221 | "%d (%d MHz) for scan\n", dev->name, | |
3222 | chan->chan, chan->freq); | |
3223 | skip = 1; | |
3224 | } | |
3225 | } | |
3226 | ||
3227 | local->scan_channel_idx++; | |
3228 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
3229 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
3230 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
3231 | struct ieee80211_hw_mode, | |
3232 | list); | |
3233 | local->scan_channel_idx = 0; | |
3234 | } | |
3235 | } | |
3236 | ||
3237 | if (skip) | |
3238 | break; | |
3239 | ||
3240 | next_delay = IEEE80211_PROBE_DELAY + | |
3241 | usecs_to_jiffies(local->hw.channel_change_time); | |
3242 | local->scan_state = SCAN_SEND_PROBE; | |
3243 | break; | |
3244 | case SCAN_SEND_PROBE: | |
3245 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
3246 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
3247 | local->scan_ssid_len); | |
3248 | next_delay = IEEE80211_CHANNEL_TIME; | |
3249 | } else | |
3250 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
3251 | local->scan_state = SCAN_SET_CHANNEL; | |
3252 | break; | |
3253 | } | |
3254 | ||
ece8eddd | 3255 | if (local->sta_sw_scanning) |
f0706e82 JB |
3256 | queue_delayed_work(local->hw.workqueue, &local->scan_work, |
3257 | next_delay); | |
3258 | } | |
3259 | ||
3260 | ||
3261 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
3262 | u8 *ssid, size_t ssid_len) | |
3263 | { | |
3264 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3265 | struct ieee80211_sub_if_data *sdata; | |
3266 | ||
3267 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
3268 | return -EINVAL; | |
3269 | ||
3270 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
3271 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
3272 | * BSSID: MACAddress | |
3273 | * SSID | |
3274 | * ScanType: ACTIVE, PASSIVE | |
3275 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
3276 | * a Probe frame during active scanning | |
3277 | * ChannelList | |
3278 | * MinChannelTime (>= ProbeDelay), in TU | |
3279 | * MaxChannelTime: (>= MinChannelTime), in TU | |
3280 | */ | |
3281 | ||
3282 | /* MLME-SCAN.confirm | |
3283 | * BSSDescriptionSet | |
3284 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
3285 | */ | |
3286 | ||
ece8eddd | 3287 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3288 | if (local->scan_dev == dev) |
3289 | return 0; | |
3290 | return -EBUSY; | |
3291 | } | |
3292 | ||
3293 | if (local->ops->hw_scan) { | |
3294 | int rc = local->ops->hw_scan(local_to_hw(local), | |
ece8eddd | 3295 | ssid, ssid_len); |
f0706e82 | 3296 | if (!rc) { |
ece8eddd | 3297 | local->sta_hw_scanning = 1; |
f0706e82 JB |
3298 | local->scan_dev = dev; |
3299 | } | |
3300 | return rc; | |
3301 | } | |
3302 | ||
ece8eddd | 3303 | local->sta_sw_scanning = 1; |
f0706e82 | 3304 | |
79010420 JB |
3305 | rcu_read_lock(); |
3306 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
14042cbe MN |
3307 | |
3308 | /* Don't stop the master interface, otherwise we can't transmit | |
3309 | * probes! */ | |
3310 | if (sdata->dev == local->mdev) | |
3311 | continue; | |
3312 | ||
f0706e82 | 3313 | netif_stop_queue(sdata->dev); |
51fb61e7 | 3314 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
d6f2da5b | 3315 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3316 | ieee80211_send_nullfunc(local, sdata, 1); |
3317 | } | |
79010420 | 3318 | rcu_read_unlock(); |
f0706e82 JB |
3319 | |
3320 | if (ssid) { | |
3321 | local->scan_ssid_len = ssid_len; | |
3322 | memcpy(local->scan_ssid, ssid, ssid_len); | |
3323 | } else | |
3324 | local->scan_ssid_len = 0; | |
3325 | local->scan_state = SCAN_SET_CHANNEL; | |
3326 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
3327 | struct ieee80211_hw_mode, | |
3328 | list); | |
3329 | local->scan_channel_idx = 0; | |
3330 | local->scan_dev = dev; | |
3331 | ||
4150c572 JB |
3332 | netif_tx_lock_bh(local->mdev); |
3333 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; | |
3334 | local->ops->configure_filter(local_to_hw(local), | |
3335 | FIF_BCN_PRBRESP_PROMISC, | |
3336 | &local->filter_flags, | |
3337 | local->mdev->mc_count, | |
3338 | local->mdev->mc_list); | |
3339 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 JB |
3340 | |
3341 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
3342 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
3343 | IEEE80211_CHANNEL_TIME); | |
3344 | ||
3345 | return 0; | |
3346 | } | |
3347 | ||
3348 | ||
3349 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
3350 | { | |
3351 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3352 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3353 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3354 | ||
51fb61e7 | 3355 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3356 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); |
3357 | ||
ece8eddd | 3358 | if (local->sta_sw_scanning || local->sta_hw_scanning) { |
f0706e82 JB |
3359 | if (local->scan_dev == dev) |
3360 | return 0; | |
3361 | return -EBUSY; | |
3362 | } | |
3363 | ||
a0af5f14 HS |
3364 | ifsta->scan_ssid_len = ssid_len; |
3365 | if (ssid_len) | |
3366 | memcpy(ifsta->scan_ssid, ssid, ssid_len); | |
f0706e82 JB |
3367 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); |
3368 | queue_work(local->hw.workqueue, &ifsta->work); | |
3369 | return 0; | |
3370 | } | |
3371 | ||
3372 | static char * | |
3373 | ieee80211_sta_scan_result(struct net_device *dev, | |
3374 | struct ieee80211_sta_bss *bss, | |
3375 | char *current_ev, char *end_buf) | |
3376 | { | |
3377 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3378 | struct iw_event iwe; | |
3379 | ||
3380 | if (time_after(jiffies, | |
3381 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
3382 | return current_ev; | |
3383 | ||
3384 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
3385 | return current_ev; | |
3386 | ||
f0706e82 JB |
3387 | memset(&iwe, 0, sizeof(iwe)); |
3388 | iwe.cmd = SIOCGIWAP; | |
3389 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
3390 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
3391 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3392 | IW_EV_ADDR_LEN); | |
3393 | ||
3394 | memset(&iwe, 0, sizeof(iwe)); | |
3395 | iwe.cmd = SIOCGIWESSID; | |
3396 | iwe.u.data.length = bss->ssid_len; | |
3397 | iwe.u.data.flags = 1; | |
3398 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3399 | bss->ssid); | |
3400 | ||
3401 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
3402 | memset(&iwe, 0, sizeof(iwe)); | |
3403 | iwe.cmd = SIOCGIWMODE; | |
3404 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
3405 | iwe.u.mode = IW_MODE_MASTER; | |
3406 | else | |
3407 | iwe.u.mode = IW_MODE_ADHOC; | |
3408 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3409 | IW_EV_UINT_LEN); | |
3410 | } | |
3411 | ||
3412 | memset(&iwe, 0, sizeof(iwe)); | |
3413 | iwe.cmd = SIOCGIWFREQ; | |
3414 | iwe.u.freq.m = bss->channel; | |
3415 | iwe.u.freq.e = 0; | |
3416 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3417 | IW_EV_FREQ_LEN); | |
3418 | iwe.u.freq.m = bss->freq * 100000; | |
3419 | iwe.u.freq.e = 1; | |
3420 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3421 | IW_EV_FREQ_LEN); | |
3422 | ||
3423 | memset(&iwe, 0, sizeof(iwe)); | |
3424 | iwe.cmd = IWEVQUAL; | |
3425 | iwe.u.qual.qual = bss->signal; | |
3426 | iwe.u.qual.level = bss->rssi; | |
3427 | iwe.u.qual.noise = bss->noise; | |
3428 | iwe.u.qual.updated = local->wstats_flags; | |
3429 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
3430 | IW_EV_QUAL_LEN); | |
3431 | ||
3432 | memset(&iwe, 0, sizeof(iwe)); | |
3433 | iwe.cmd = SIOCGIWENCODE; | |
3434 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
3435 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
3436 | else | |
3437 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
3438 | iwe.u.data.length = 0; | |
3439 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
3440 | ||
3441 | if (bss && bss->wpa_ie) { | |
3442 | memset(&iwe, 0, sizeof(iwe)); | |
3443 | iwe.cmd = IWEVGENIE; | |
3444 | iwe.u.data.length = bss->wpa_ie_len; | |
3445 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3446 | bss->wpa_ie); | |
3447 | } | |
3448 | ||
3449 | if (bss && bss->rsn_ie) { | |
3450 | memset(&iwe, 0, sizeof(iwe)); | |
3451 | iwe.cmd = IWEVGENIE; | |
3452 | iwe.u.data.length = bss->rsn_ie_len; | |
3453 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3454 | bss->rsn_ie); | |
3455 | } | |
3456 | ||
3457 | if (bss && bss->supp_rates_len > 0) { | |
3458 | /* display all supported rates in readable format */ | |
3459 | char *p = current_ev + IW_EV_LCP_LEN; | |
3460 | int i; | |
3461 | ||
3462 | memset(&iwe, 0, sizeof(iwe)); | |
3463 | iwe.cmd = SIOCGIWRATE; | |
3464 | /* Those two flags are ignored... */ | |
3465 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
3466 | ||
3467 | for (i = 0; i < bss->supp_rates_len; i++) { | |
3468 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
3469 | 0x7f) * 500000); | |
3470 | p = iwe_stream_add_value(current_ev, p, | |
3471 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
3472 | } | |
3473 | current_ev = p; | |
3474 | } | |
3475 | ||
3476 | if (bss) { | |
3477 | char *buf; | |
3478 | buf = kmalloc(30, GFP_ATOMIC); | |
3479 | if (buf) { | |
3480 | memset(&iwe, 0, sizeof(iwe)); | |
3481 | iwe.cmd = IWEVCUSTOM; | |
3482 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
3483 | iwe.u.data.length = strlen(buf); | |
3484 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
3485 | &iwe, buf); | |
3486 | kfree(buf); | |
3487 | } | |
3488 | } | |
3489 | ||
f0706e82 JB |
3490 | return current_ev; |
3491 | } | |
3492 | ||
3493 | ||
3494 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
3495 | { | |
3496 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3497 | char *current_ev = buf; | |
3498 | char *end_buf = buf + len; | |
3499 | struct ieee80211_sta_bss *bss; | |
3500 | ||
3501 | spin_lock_bh(&local->sta_bss_lock); | |
3502 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3503 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3504 | spin_unlock_bh(&local->sta_bss_lock); | |
3505 | return -E2BIG; | |
3506 | } | |
3507 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3508 | end_buf); | |
3509 | } | |
3510 | spin_unlock_bh(&local->sta_bss_lock); | |
3511 | return current_ev - buf; | |
3512 | } | |
3513 | ||
3514 | ||
3515 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3516 | { | |
3517 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3518 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3519 | kfree(ifsta->extra_ie); | |
3520 | if (len == 0) { | |
3521 | ifsta->extra_ie = NULL; | |
3522 | ifsta->extra_ie_len = 0; | |
3523 | return 0; | |
3524 | } | |
3525 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3526 | if (!ifsta->extra_ie) { | |
3527 | ifsta->extra_ie_len = 0; | |
3528 | return -ENOMEM; | |
3529 | } | |
3530 | memcpy(ifsta->extra_ie, ie, len); | |
3531 | ifsta->extra_ie_len = len; | |
3532 | return 0; | |
3533 | } | |
3534 | ||
3535 | ||
3536 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3537 | struct sk_buff *skb, u8 *bssid, | |
3538 | u8 *addr) | |
3539 | { | |
3540 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3541 | struct sta_info *sta; | |
91fa558b | 3542 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 | 3543 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3544 | |
3545 | /* TODO: Could consider removing the least recently used entry and | |
3546 | * allow new one to be added. */ | |
3547 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3548 | if (net_ratelimit()) { | |
3549 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0795af57 | 3550 | "entry %s\n", dev->name, print_mac(mac, addr)); |
f0706e82 JB |
3551 | } |
3552 | return NULL; | |
3553 | } | |
3554 | ||
0795af57 | 3555 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
dd1cd4c6 | 3556 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name); |
f0706e82 JB |
3557 | |
3558 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3559 | if (!sta) | |
3560 | return NULL; | |
3561 | ||
3562 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3563 | ||
3564 | rate_control_rate_init(sta, local); | |
3565 | ||
3566 | return sta; /* caller will call sta_info_put() */ | |
3567 | } | |
3568 | ||
3569 | ||
3570 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3571 | { | |
3572 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3573 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3574 | ||
3575 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3576 | dev->name, reason); | |
3577 | ||
51fb61e7 JB |
3578 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA && |
3579 | sdata->vif.type != IEEE80211_IF_TYPE_IBSS) | |
f0706e82 JB |
3580 | return -EINVAL; |
3581 | ||
3582 | ieee80211_send_deauth(dev, ifsta, reason); | |
3583 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3584 | return 0; | |
3585 | } | |
3586 | ||
3587 | ||
3588 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3589 | { | |
3590 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3591 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3592 | ||
3593 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3594 | dev->name, reason); | |
3595 | ||
51fb61e7 | 3596 | if (sdata->vif.type != IEEE80211_IF_TYPE_STA) |
f0706e82 JB |
3597 | return -EINVAL; |
3598 | ||
d6f2da5b | 3599 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3600 | return -1; |
3601 | ||
3602 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3603 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3604 | return 0; | |
3605 | } |