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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | /* TODO: | |
15 | * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs | |
16 | * order BSS list by RSSI(?) ("quality of AP") | |
17 | * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, | |
18 | * SSID) | |
19 | */ | |
5b323edb | 20 | #include <linux/delay.h> |
f0706e82 JB |
21 | #include <linux/if_ether.h> |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/if_arp.h> | |
25 | #include <linux/wireless.h> | |
26 | #include <linux/random.h> | |
27 | #include <linux/etherdevice.h> | |
f0706e82 JB |
28 | #include <net/iw_handler.h> |
29 | #include <asm/types.h> | |
f0706e82 JB |
30 | |
31 | #include <net/mac80211.h> | |
32 | #include "ieee80211_i.h" | |
33 | #include "ieee80211_rate.h" | |
34 | #include "hostapd_ioctl.h" | |
35 | ||
36 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
37 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
38 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
39 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
40 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
41 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
42 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
43 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
44 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
45 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
46 | ||
47 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
48 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
49 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
50 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
51 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
52 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
53 | ||
54 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
55 | ||
56 | ||
57 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
58 | ||
59 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
60 | ||
61 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
62 | u8 *ssid, size_t ssid_len); | |
63 | static struct ieee80211_sta_bss * | |
64 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid); | |
65 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
66 | struct ieee80211_sta_bss *bss); | |
67 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
68 | struct ieee80211_if_sta *ifsta); | |
69 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
70 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
71 | u8 *ssid, size_t ssid_len); | |
72 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
73 | struct ieee80211_if_sta *ifsta); | |
74 | ||
75 | ||
76 | /* Parsed Information Elements */ | |
77 | struct ieee802_11_elems { | |
5558235c | 78 | /* pointers to IEs */ |
f0706e82 | 79 | u8 *ssid; |
f0706e82 | 80 | u8 *supp_rates; |
f0706e82 | 81 | u8 *fh_params; |
f0706e82 | 82 | u8 *ds_params; |
f0706e82 | 83 | u8 *cf_params; |
f0706e82 | 84 | u8 *tim; |
f0706e82 | 85 | u8 *ibss_params; |
f0706e82 | 86 | u8 *challenge; |
f0706e82 | 87 | u8 *wpa; |
f0706e82 | 88 | u8 *rsn; |
f0706e82 | 89 | u8 *erp_info; |
f0706e82 | 90 | u8 *ext_supp_rates; |
f0706e82 | 91 | u8 *wmm_info; |
f0706e82 | 92 | u8 *wmm_param; |
5558235c JB |
93 | |
94 | /* length of them, respectively */ | |
95 | u8 ssid_len; | |
96 | u8 supp_rates_len; | |
97 | u8 fh_params_len; | |
98 | u8 ds_params_len; | |
99 | u8 cf_params_len; | |
100 | u8 tim_len; | |
101 | u8 ibss_params_len; | |
102 | u8 challenge_len; | |
103 | u8 wpa_len; | |
104 | u8 rsn_len; | |
105 | u8 erp_info_len; | |
106 | u8 ext_supp_rates_len; | |
107 | u8 wmm_info_len; | |
f0706e82 JB |
108 | u8 wmm_param_len; |
109 | }; | |
110 | ||
111 | typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes; | |
112 | ||
113 | ||
114 | static ParseRes ieee802_11_parse_elems(u8 *start, size_t len, | |
115 | struct ieee802_11_elems *elems) | |
116 | { | |
117 | size_t left = len; | |
118 | u8 *pos = start; | |
119 | int unknown = 0; | |
120 | ||
121 | memset(elems, 0, sizeof(*elems)); | |
122 | ||
123 | while (left >= 2) { | |
124 | u8 id, elen; | |
125 | ||
126 | id = *pos++; | |
127 | elen = *pos++; | |
128 | left -= 2; | |
129 | ||
130 | if (elen > left) { | |
131 | #if 0 | |
132 | if (net_ratelimit()) | |
133 | printk(KERN_DEBUG "IEEE 802.11 element parse " | |
134 | "failed (id=%d elen=%d left=%d)\n", | |
135 | id, elen, left); | |
136 | #endif | |
137 | return ParseFailed; | |
138 | } | |
139 | ||
140 | switch (id) { | |
141 | case WLAN_EID_SSID: | |
142 | elems->ssid = pos; | |
143 | elems->ssid_len = elen; | |
144 | break; | |
145 | case WLAN_EID_SUPP_RATES: | |
146 | elems->supp_rates = pos; | |
147 | elems->supp_rates_len = elen; | |
148 | break; | |
149 | case WLAN_EID_FH_PARAMS: | |
150 | elems->fh_params = pos; | |
151 | elems->fh_params_len = elen; | |
152 | break; | |
153 | case WLAN_EID_DS_PARAMS: | |
154 | elems->ds_params = pos; | |
155 | elems->ds_params_len = elen; | |
156 | break; | |
157 | case WLAN_EID_CF_PARAMS: | |
158 | elems->cf_params = pos; | |
159 | elems->cf_params_len = elen; | |
160 | break; | |
161 | case WLAN_EID_TIM: | |
162 | elems->tim = pos; | |
163 | elems->tim_len = elen; | |
164 | break; | |
165 | case WLAN_EID_IBSS_PARAMS: | |
166 | elems->ibss_params = pos; | |
167 | elems->ibss_params_len = elen; | |
168 | break; | |
169 | case WLAN_EID_CHALLENGE: | |
170 | elems->challenge = pos; | |
171 | elems->challenge_len = elen; | |
172 | break; | |
173 | case WLAN_EID_WPA: | |
174 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
175 | pos[2] == 0xf2) { | |
176 | /* Microsoft OUI (00:50:F2) */ | |
177 | if (pos[3] == 1) { | |
178 | /* OUI Type 1 - WPA IE */ | |
179 | elems->wpa = pos; | |
180 | elems->wpa_len = elen; | |
181 | } else if (elen >= 5 && pos[3] == 2) { | |
182 | if (pos[4] == 0) { | |
183 | elems->wmm_info = pos; | |
184 | elems->wmm_info_len = elen; | |
185 | } else if (pos[4] == 1) { | |
186 | elems->wmm_param = pos; | |
187 | elems->wmm_param_len = elen; | |
188 | } | |
189 | } | |
190 | } | |
191 | break; | |
192 | case WLAN_EID_RSN: | |
193 | elems->rsn = pos; | |
194 | elems->rsn_len = elen; | |
195 | break; | |
196 | case WLAN_EID_ERP_INFO: | |
197 | elems->erp_info = pos; | |
198 | elems->erp_info_len = elen; | |
199 | break; | |
200 | case WLAN_EID_EXT_SUPP_RATES: | |
201 | elems->ext_supp_rates = pos; | |
202 | elems->ext_supp_rates_len = elen; | |
203 | break; | |
204 | default: | |
205 | #if 0 | |
206 | printk(KERN_DEBUG "IEEE 802.11 element parse ignored " | |
207 | "unknown element (id=%d elen=%d)\n", | |
208 | id, elen); | |
209 | #endif | |
210 | unknown++; | |
211 | break; | |
212 | } | |
213 | ||
214 | left -= elen; | |
215 | pos += elen; | |
216 | } | |
217 | ||
218 | /* Do not trigger error if left == 1 as Apple Airport base stations | |
219 | * send AssocResps that are one spurious byte too long. */ | |
220 | ||
221 | return unknown ? ParseUnknown : ParseOK; | |
222 | } | |
223 | ||
224 | ||
225 | ||
226 | ||
227 | static int ecw2cw(int ecw) | |
228 | { | |
229 | int cw = 1; | |
230 | while (ecw > 0) { | |
231 | cw <<= 1; | |
232 | ecw--; | |
233 | } | |
234 | return cw - 1; | |
235 | } | |
236 | ||
237 | ||
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 | ||
5628221c DD |
316 | static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) |
317 | { | |
5628221c DD |
318 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
319 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
320 | int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
321 | ||
63fc33ce | 322 | if (use_protection != sdata->use_protection) { |
5628221c DD |
323 | if (net_ratelimit()) { |
324 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
325 | MAC_FMT ")\n", | |
326 | dev->name, | |
327 | use_protection ? "enabled" : "disabled", | |
328 | MAC_ARG(ifsta->bssid)); | |
329 | } | |
63fc33ce | 330 | sdata->use_protection = use_protection; |
5628221c DD |
331 | } |
332 | } | |
333 | ||
334 | ||
f0706e82 JB |
335 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
336 | struct ieee80211_if_sta *ifsta) | |
337 | { | |
338 | char *buf; | |
339 | size_t len; | |
340 | int i; | |
341 | union iwreq_data wrqu; | |
342 | ||
343 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
344 | return; | |
345 | ||
346 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
347 | ifsta->assocresp_ies_len), GFP_ATOMIC); | |
348 | if (!buf) | |
349 | return; | |
350 | ||
351 | len = sprintf(buf, "ASSOCINFO("); | |
352 | if (ifsta->assocreq_ies) { | |
353 | len += sprintf(buf + len, "ReqIEs="); | |
354 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
355 | len += sprintf(buf + len, "%02x", | |
356 | ifsta->assocreq_ies[i]); | |
357 | } | |
358 | } | |
359 | if (ifsta->assocresp_ies) { | |
360 | if (ifsta->assocreq_ies) | |
361 | len += sprintf(buf + len, " "); | |
362 | len += sprintf(buf + len, "RespIEs="); | |
363 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
364 | len += sprintf(buf + len, "%02x", | |
365 | ifsta->assocresp_ies[i]); | |
366 | } | |
367 | } | |
368 | len += sprintf(buf + len, ")"); | |
369 | ||
370 | if (len > IW_CUSTOM_MAX) { | |
371 | len = sprintf(buf, "ASSOCRESPIE="); | |
372 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
373 | len += sprintf(buf + len, "%02x", | |
374 | ifsta->assocresp_ies[i]); | |
375 | } | |
376 | } | |
377 | ||
378 | memset(&wrqu, 0, sizeof(wrqu)); | |
379 | wrqu.data.length = len; | |
380 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
381 | ||
382 | kfree(buf); | |
383 | } | |
384 | ||
385 | ||
386 | static void ieee80211_set_associated(struct net_device *dev, | |
387 | struct ieee80211_if_sta *ifsta, int assoc) | |
388 | { | |
389 | union iwreq_data wrqu; | |
63fc33ce | 390 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
391 | |
392 | if (ifsta->associated == assoc) | |
393 | return; | |
394 | ||
395 | ifsta->associated = assoc; | |
396 | ||
397 | if (assoc) { | |
398 | struct ieee80211_sub_if_data *sdata; | |
5628221c | 399 | struct ieee80211_sta_bss *bss; |
f0706e82 JB |
400 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
401 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
402 | return; | |
5628221c DD |
403 | |
404 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
405 | if (bss) { | |
406 | if (bss->has_erp_value) | |
407 | ieee80211_handle_erp_ie(dev, bss->erp_value); | |
408 | ieee80211_rx_bss_put(dev, bss); | |
409 | } | |
410 | ||
f0706e82 JB |
411 | netif_carrier_on(dev); |
412 | ifsta->prev_bssid_set = 1; | |
413 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
414 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
415 | ieee80211_sta_send_associnfo(dev, ifsta); | |
416 | } else { | |
417 | netif_carrier_off(dev); | |
63fc33ce | 418 | sdata->use_protection = 0; |
f0706e82 JB |
419 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
420 | } | |
421 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
422 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
423 | ifsta->last_probe = jiffies; | |
424 | } | |
425 | ||
426 | static void ieee80211_set_disassoc(struct net_device *dev, | |
427 | struct ieee80211_if_sta *ifsta, int deauth) | |
428 | { | |
429 | if (deauth) | |
430 | ifsta->auth_tries = 0; | |
431 | ifsta->assoc_tries = 0; | |
432 | ieee80211_set_associated(dev, ifsta, 0); | |
433 | } | |
434 | ||
435 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
436 | int encrypt) | |
437 | { | |
438 | struct ieee80211_sub_if_data *sdata; | |
439 | struct ieee80211_tx_packet_data *pkt_data; | |
440 | ||
441 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
442 | skb->dev = sdata->local->mdev; | |
443 | skb_set_mac_header(skb, 0); | |
444 | skb_set_network_header(skb, 0); | |
445 | skb_set_transport_header(skb, 0); | |
446 | ||
447 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
448 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
449 | pkt_data->ifindex = sdata->dev->ifindex; | |
450 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
451 | pkt_data->do_not_encrypt = !encrypt; | |
452 | ||
453 | dev_queue_xmit(skb); | |
454 | } | |
455 | ||
456 | ||
457 | static void ieee80211_send_auth(struct net_device *dev, | |
458 | struct ieee80211_if_sta *ifsta, | |
459 | int transaction, u8 *extra, size_t extra_len, | |
460 | int encrypt) | |
461 | { | |
462 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
463 | struct sk_buff *skb; | |
464 | struct ieee80211_mgmt *mgmt; | |
465 | ||
466 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
467 | sizeof(*mgmt) + 6 + extra_len); | |
468 | if (!skb) { | |
469 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
470 | "frame\n", dev->name); | |
471 | return; | |
472 | } | |
473 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
474 | ||
475 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
476 | memset(mgmt, 0, 24 + 6); | |
477 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
478 | IEEE80211_STYPE_AUTH); | |
479 | if (encrypt) | |
480 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
481 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
482 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
483 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
484 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
485 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
486 | ifsta->auth_transaction = transaction + 1; | |
487 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
488 | if (extra) | |
489 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
490 | ||
491 | ieee80211_sta_tx(dev, skb, encrypt); | |
492 | } | |
493 | ||
494 | ||
495 | static void ieee80211_authenticate(struct net_device *dev, | |
496 | struct ieee80211_if_sta *ifsta) | |
497 | { | |
498 | ifsta->auth_tries++; | |
499 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
500 | printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT | |
501 | " timed out\n", | |
502 | dev->name, MAC_ARG(ifsta->bssid)); | |
503 | ifsta->state = IEEE80211_DISABLED; | |
504 | return; | |
505 | } | |
506 | ||
507 | ifsta->state = IEEE80211_AUTHENTICATE; | |
508 | printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n", | |
509 | dev->name, MAC_ARG(ifsta->bssid)); | |
510 | ||
511 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
512 | ||
513 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
514 | } | |
515 | ||
516 | ||
517 | static void ieee80211_send_assoc(struct net_device *dev, | |
518 | struct ieee80211_if_sta *ifsta) | |
519 | { | |
520 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
521 | struct ieee80211_hw_mode *mode; | |
522 | struct sk_buff *skb; | |
523 | struct ieee80211_mgmt *mgmt; | |
524 | u8 *pos, *ies; | |
525 | int i, len; | |
526 | u16 capab; | |
527 | struct ieee80211_sta_bss *bss; | |
528 | int wmm = 0; | |
529 | ||
530 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
531 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
532 | ifsta->ssid_len); | |
533 | if (!skb) { | |
534 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
535 | "frame\n", dev->name); | |
536 | return; | |
537 | } | |
538 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
539 | ||
540 | mode = local->oper_hw_mode; | |
541 | capab = ifsta->capab; | |
542 | if (mode->mode == MODE_IEEE80211G) { | |
543 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
544 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
545 | } | |
546 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
547 | if (bss) { | |
548 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
549 | capab |= WLAN_CAPABILITY_PRIVACY; | |
550 | if (bss->wmm_ie) { | |
551 | wmm = 1; | |
552 | } | |
553 | ieee80211_rx_bss_put(dev, bss); | |
554 | } | |
555 | ||
556 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
557 | memset(mgmt, 0, 24); | |
558 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
559 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
560 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
561 | ||
562 | if (ifsta->prev_bssid_set) { | |
563 | skb_put(skb, 10); | |
564 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
565 | IEEE80211_STYPE_REASSOC_REQ); | |
566 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
567 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
568 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
569 | ETH_ALEN); | |
570 | } else { | |
571 | skb_put(skb, 4); | |
572 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
573 | IEEE80211_STYPE_ASSOC_REQ); | |
574 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
575 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
576 | } | |
577 | ||
578 | /* SSID */ | |
579 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
580 | *pos++ = WLAN_EID_SSID; | |
581 | *pos++ = ifsta->ssid_len; | |
582 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
583 | ||
584 | len = mode->num_rates; | |
585 | if (len > 8) | |
586 | len = 8; | |
587 | pos = skb_put(skb, len + 2); | |
588 | *pos++ = WLAN_EID_SUPP_RATES; | |
589 | *pos++ = len; | |
590 | for (i = 0; i < len; i++) { | |
591 | int rate = mode->rates[i].rate; | |
592 | if (mode->mode == MODE_ATHEROS_TURBO) | |
593 | rate /= 2; | |
594 | *pos++ = (u8) (rate / 5); | |
595 | } | |
596 | ||
597 | if (mode->num_rates > len) { | |
598 | pos = skb_put(skb, mode->num_rates - len + 2); | |
599 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
600 | *pos++ = mode->num_rates - len; | |
601 | for (i = len; i < mode->num_rates; i++) { | |
602 | int rate = mode->rates[i].rate; | |
603 | if (mode->mode == MODE_ATHEROS_TURBO) | |
604 | rate /= 2; | |
605 | *pos++ = (u8) (rate / 5); | |
606 | } | |
607 | } | |
608 | ||
609 | if (ifsta->extra_ie) { | |
610 | pos = skb_put(skb, ifsta->extra_ie_len); | |
611 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
612 | } | |
613 | ||
614 | if (wmm && ifsta->wmm_enabled) { | |
615 | pos = skb_put(skb, 9); | |
616 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
617 | *pos++ = 7; /* len */ | |
618 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
619 | *pos++ = 0x50; | |
620 | *pos++ = 0xf2; | |
621 | *pos++ = 2; /* WME */ | |
622 | *pos++ = 0; /* WME info */ | |
623 | *pos++ = 1; /* WME ver */ | |
624 | *pos++ = 0; | |
625 | } | |
626 | ||
627 | kfree(ifsta->assocreq_ies); | |
628 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
629 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC); | |
630 | if (ifsta->assocreq_ies) | |
631 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
632 | ||
633 | ieee80211_sta_tx(dev, skb, 0); | |
634 | } | |
635 | ||
636 | ||
637 | static void ieee80211_send_deauth(struct net_device *dev, | |
638 | struct ieee80211_if_sta *ifsta, u16 reason) | |
639 | { | |
640 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
641 | struct sk_buff *skb; | |
642 | struct ieee80211_mgmt *mgmt; | |
643 | ||
644 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
645 | if (!skb) { | |
646 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
647 | "frame\n", dev->name); | |
648 | return; | |
649 | } | |
650 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
651 | ||
652 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
653 | memset(mgmt, 0, 24); | |
654 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
655 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
656 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
657 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
658 | IEEE80211_STYPE_DEAUTH); | |
659 | skb_put(skb, 2); | |
660 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
661 | ||
662 | ieee80211_sta_tx(dev, skb, 0); | |
663 | } | |
664 | ||
665 | ||
666 | static void ieee80211_send_disassoc(struct net_device *dev, | |
667 | struct ieee80211_if_sta *ifsta, u16 reason) | |
668 | { | |
669 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
670 | struct sk_buff *skb; | |
671 | struct ieee80211_mgmt *mgmt; | |
672 | ||
673 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
674 | if (!skb) { | |
675 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
676 | "frame\n", dev->name); | |
677 | return; | |
678 | } | |
679 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
680 | ||
681 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
682 | memset(mgmt, 0, 24); | |
683 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
684 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
685 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
686 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
687 | IEEE80211_STYPE_DISASSOC); | |
688 | skb_put(skb, 2); | |
689 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
690 | ||
691 | ieee80211_sta_tx(dev, skb, 0); | |
692 | } | |
693 | ||
694 | ||
695 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
696 | struct ieee80211_if_sta *ifsta) | |
697 | { | |
698 | struct ieee80211_sta_bss *bss; | |
699 | int res = 0; | |
700 | ||
701 | if (!ifsta || ifsta->mixed_cell || | |
702 | ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE) | |
703 | return 0; | |
704 | ||
705 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
706 | if (!bss) | |
707 | return 0; | |
708 | ||
709 | if (ieee80211_sta_wep_configured(dev) != | |
710 | !!(bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
711 | res = 1; | |
712 | ||
713 | ieee80211_rx_bss_put(dev, bss); | |
714 | ||
715 | return res; | |
716 | } | |
717 | ||
718 | ||
719 | static void ieee80211_associate(struct net_device *dev, | |
720 | struct ieee80211_if_sta *ifsta) | |
721 | { | |
722 | ifsta->assoc_tries++; | |
723 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
724 | printk(KERN_DEBUG "%s: association with AP " MAC_FMT | |
725 | " timed out\n", | |
726 | dev->name, MAC_ARG(ifsta->bssid)); | |
727 | ifsta->state = IEEE80211_DISABLED; | |
728 | return; | |
729 | } | |
730 | ||
731 | ifsta->state = IEEE80211_ASSOCIATE; | |
732 | printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n", | |
733 | dev->name, MAC_ARG(ifsta->bssid)); | |
734 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
735 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
736 | "mixed-cell disabled - abort association\n", dev->name); | |
737 | ifsta->state = IEEE80211_DISABLED; | |
738 | return; | |
739 | } | |
740 | ||
741 | ieee80211_send_assoc(dev, ifsta); | |
742 | ||
743 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
744 | } | |
745 | ||
746 | ||
747 | static void ieee80211_associated(struct net_device *dev, | |
748 | struct ieee80211_if_sta *ifsta) | |
749 | { | |
750 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
751 | struct sta_info *sta; | |
752 | int disassoc; | |
753 | ||
754 | /* TODO: start monitoring current AP signal quality and number of | |
755 | * missed beacons. Scan other channels every now and then and search | |
756 | * for better APs. */ | |
757 | /* TODO: remove expired BSSes */ | |
758 | ||
759 | ifsta->state = IEEE80211_ASSOCIATED; | |
760 | ||
761 | sta = sta_info_get(local, ifsta->bssid); | |
762 | if (!sta) { | |
763 | printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n", | |
764 | dev->name, MAC_ARG(ifsta->bssid)); | |
765 | disassoc = 1; | |
766 | } else { | |
767 | disassoc = 0; | |
768 | if (time_after(jiffies, | |
769 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
770 | if (ifsta->probereq_poll) { | |
771 | printk(KERN_DEBUG "%s: No ProbeResp from " | |
772 | "current AP " MAC_FMT " - assume out of " | |
773 | "range\n", | |
774 | dev->name, MAC_ARG(ifsta->bssid)); | |
775 | disassoc = 1; | |
be8755e1 | 776 | sta_info_free(sta); |
f0706e82 JB |
777 | ifsta->probereq_poll = 0; |
778 | } else { | |
779 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
780 | local->scan_ssid, | |
781 | local->scan_ssid_len); | |
782 | ifsta->probereq_poll = 1; | |
783 | } | |
784 | } else { | |
785 | ifsta->probereq_poll = 0; | |
786 | if (time_after(jiffies, ifsta->last_probe + | |
787 | IEEE80211_PROBE_INTERVAL)) { | |
788 | ifsta->last_probe = jiffies; | |
789 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
790 | ifsta->ssid, | |
791 | ifsta->ssid_len); | |
792 | } | |
793 | } | |
794 | sta_info_put(sta); | |
795 | } | |
796 | if (disassoc) { | |
797 | union iwreq_data wrqu; | |
798 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
799 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
800 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
801 | mod_timer(&ifsta->timer, jiffies + | |
802 | IEEE80211_MONITORING_INTERVAL + 30 * HZ); | |
803 | } else { | |
804 | mod_timer(&ifsta->timer, jiffies + | |
805 | IEEE80211_MONITORING_INTERVAL); | |
806 | } | |
807 | } | |
808 | ||
809 | ||
810 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
811 | u8 *ssid, size_t ssid_len) | |
812 | { | |
813 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
814 | struct ieee80211_hw_mode *mode; | |
815 | struct sk_buff *skb; | |
816 | struct ieee80211_mgmt *mgmt; | |
817 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
818 | int i; | |
819 | ||
820 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
821 | if (!skb) { | |
822 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
823 | "request\n", dev->name); | |
824 | return; | |
825 | } | |
826 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
827 | ||
828 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
829 | memset(mgmt, 0, 24); | |
830 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
831 | IEEE80211_STYPE_PROBE_REQ); | |
832 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
833 | if (dst) { | |
834 | memcpy(mgmt->da, dst, ETH_ALEN); | |
835 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
836 | } else { | |
837 | memset(mgmt->da, 0xff, ETH_ALEN); | |
838 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
839 | } | |
840 | pos = skb_put(skb, 2 + ssid_len); | |
841 | *pos++ = WLAN_EID_SSID; | |
842 | *pos++ = ssid_len; | |
843 | memcpy(pos, ssid, ssid_len); | |
844 | ||
845 | supp_rates = skb_put(skb, 2); | |
846 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
847 | supp_rates[1] = 0; | |
848 | mode = local->oper_hw_mode; | |
849 | for (i = 0; i < mode->num_rates; i++) { | |
850 | struct ieee80211_rate *rate = &mode->rates[i]; | |
851 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
852 | continue; | |
853 | if (esupp_rates) { | |
854 | pos = skb_put(skb, 1); | |
855 | esupp_rates[1]++; | |
856 | } else if (supp_rates[1] == 8) { | |
857 | esupp_rates = skb_put(skb, 3); | |
858 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
859 | esupp_rates[1] = 1; | |
860 | pos = &esupp_rates[2]; | |
861 | } else { | |
862 | pos = skb_put(skb, 1); | |
863 | supp_rates[1]++; | |
864 | } | |
865 | if (mode->mode == MODE_ATHEROS_TURBO) | |
866 | *pos = rate->rate / 10; | |
867 | else | |
868 | *pos = rate->rate / 5; | |
869 | } | |
870 | ||
871 | ieee80211_sta_tx(dev, skb, 0); | |
872 | } | |
873 | ||
874 | ||
875 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
876 | { | |
877 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
878 | if (!sdata || !sdata->default_key || | |
879 | sdata->default_key->alg != ALG_WEP) | |
880 | return 0; | |
881 | return 1; | |
882 | } | |
883 | ||
884 | ||
885 | static void ieee80211_auth_completed(struct net_device *dev, | |
886 | struct ieee80211_if_sta *ifsta) | |
887 | { | |
888 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
889 | ifsta->authenticated = 1; | |
890 | ieee80211_associate(dev, ifsta); | |
891 | } | |
892 | ||
893 | ||
894 | static void ieee80211_auth_challenge(struct net_device *dev, | |
895 | struct ieee80211_if_sta *ifsta, | |
896 | struct ieee80211_mgmt *mgmt, | |
897 | size_t len) | |
898 | { | |
899 | u8 *pos; | |
900 | struct ieee802_11_elems elems; | |
901 | ||
902 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
903 | pos = mgmt->u.auth.variable; | |
904 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
905 | == ParseFailed) { | |
906 | printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n", | |
907 | dev->name); | |
908 | return; | |
909 | } | |
910 | if (!elems.challenge) { | |
911 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
912 | "frame\n", dev->name); | |
913 | return; | |
914 | } | |
915 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
916 | elems.challenge_len + 2, 1); | |
917 | } | |
918 | ||
919 | ||
920 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, | |
921 | struct ieee80211_if_sta *ifsta, | |
922 | struct ieee80211_mgmt *mgmt, | |
923 | size_t len) | |
924 | { | |
925 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
926 | u16 auth_alg, auth_transaction, status_code; | |
927 | ||
928 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
929 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
930 | printk(KERN_DEBUG "%s: authentication frame received from " | |
931 | MAC_FMT ", but not in authenticate state - ignored\n", | |
932 | dev->name, MAC_ARG(mgmt->sa)); | |
933 | return; | |
934 | } | |
935 | ||
936 | if (len < 24 + 6) { | |
937 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
938 | "received from " MAC_FMT " - ignored\n", | |
939 | dev->name, len, MAC_ARG(mgmt->sa)); | |
940 | return; | |
941 | } | |
942 | ||
943 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
944 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
945 | printk(KERN_DEBUG "%s: authentication frame received from " | |
946 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
947 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
948 | MAC_ARG(mgmt->bssid)); | |
949 | return; | |
950 | } | |
951 | ||
952 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
953 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { | |
954 | printk(KERN_DEBUG "%s: authentication frame received from " | |
955 | "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
956 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
957 | MAC_ARG(mgmt->bssid)); | |
958 | return; | |
959 | } | |
960 | ||
961 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
962 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
963 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
964 | ||
965 | printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d " | |
966 | "transaction=%d status=%d)\n", | |
967 | dev->name, MAC_ARG(mgmt->sa), auth_alg, | |
968 | auth_transaction, status_code); | |
969 | ||
970 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
971 | /* IEEE 802.11 standard does not require authentication in IBSS | |
972 | * networks and most implementations do not seem to use it. | |
973 | * However, try to reply to authentication attempts if someone | |
974 | * has actually implemented this. | |
975 | * TODO: Could implement shared key authentication. */ | |
976 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
977 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
978 | "frame (alg=%d transaction=%d)\n", | |
979 | dev->name, auth_alg, auth_transaction); | |
980 | return; | |
981 | } | |
982 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
983 | } | |
984 | ||
985 | if (auth_alg != ifsta->auth_alg || | |
986 | auth_transaction != ifsta->auth_transaction) { | |
987 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
988 | "(alg=%d transaction=%d)\n", | |
989 | dev->name, auth_alg, auth_transaction); | |
990 | return; | |
991 | } | |
992 | ||
993 | if (status_code != WLAN_STATUS_SUCCESS) { | |
994 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
995 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
996 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
997 | u8 algs[3]; | |
998 | const int num_algs = ARRAY_SIZE(algs); | |
999 | int i, pos; | |
1000 | algs[0] = algs[1] = algs[2] = 0xff; | |
1001 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1002 | algs[0] = WLAN_AUTH_OPEN; | |
1003 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1004 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1005 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1006 | algs[2] = WLAN_AUTH_LEAP; | |
1007 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1008 | pos = 0; | |
1009 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1010 | pos = 1; | |
1011 | else | |
1012 | pos = 2; | |
1013 | for (i = 0; i < num_algs; i++) { | |
1014 | pos++; | |
1015 | if (pos >= num_algs) | |
1016 | pos = 0; | |
1017 | if (algs[pos] == ifsta->auth_alg || | |
1018 | algs[pos] == 0xff) | |
1019 | continue; | |
1020 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1021 | !ieee80211_sta_wep_configured(dev)) | |
1022 | continue; | |
1023 | ifsta->auth_alg = algs[pos]; | |
1024 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1025 | "next try\n", | |
1026 | dev->name, ifsta->auth_alg); | |
1027 | break; | |
1028 | } | |
1029 | } | |
1030 | return; | |
1031 | } | |
1032 | ||
1033 | switch (ifsta->auth_alg) { | |
1034 | case WLAN_AUTH_OPEN: | |
1035 | case WLAN_AUTH_LEAP: | |
1036 | ieee80211_auth_completed(dev, ifsta); | |
1037 | break; | |
1038 | case WLAN_AUTH_SHARED_KEY: | |
1039 | if (ifsta->auth_transaction == 4) | |
1040 | ieee80211_auth_completed(dev, ifsta); | |
1041 | else | |
1042 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1043 | break; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | ||
1048 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1049 | struct ieee80211_if_sta *ifsta, | |
1050 | struct ieee80211_mgmt *mgmt, | |
1051 | size_t len) | |
1052 | { | |
1053 | u16 reason_code; | |
1054 | ||
1055 | if (len < 24 + 2) { | |
1056 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
1057 | "received from " MAC_FMT " - ignored\n", | |
1058 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1063 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
1064 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1065 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1066 | MAC_ARG(mgmt->bssid)); | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1071 | ||
1072 | printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT | |
1073 | " (reason=%d)\n", | |
1074 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1075 | ||
1076 | if (ifsta->authenticated) { | |
1077 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); | |
1078 | } | |
1079 | ||
1080 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1081 | ifsta->state == IEEE80211_ASSOCIATE || | |
1082 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1083 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1084 | mod_timer(&ifsta->timer, jiffies + | |
1085 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1086 | } | |
1087 | ||
1088 | ieee80211_set_disassoc(dev, ifsta, 1); | |
1089 | ifsta->authenticated = 0; | |
1090 | } | |
1091 | ||
1092 | ||
1093 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1094 | struct ieee80211_if_sta *ifsta, | |
1095 | struct ieee80211_mgmt *mgmt, | |
1096 | size_t len) | |
1097 | { | |
1098 | u16 reason_code; | |
1099 | ||
1100 | if (len < 24 + 2) { | |
1101 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
1102 | "received from " MAC_FMT " - ignored\n", | |
1103 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1108 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
1109 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1110 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1111 | MAC_ARG(mgmt->bssid)); | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1116 | ||
1117 | printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT | |
1118 | " (reason=%d)\n", | |
1119 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1120 | ||
1121 | if (ifsta->associated) | |
1122 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); | |
1123 | ||
1124 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1125 | ifsta->state = IEEE80211_ASSOCIATE; | |
1126 | mod_timer(&ifsta->timer, jiffies + | |
1127 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1128 | } | |
1129 | ||
1130 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1131 | } | |
1132 | ||
1133 | ||
1134 | static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, | |
1135 | struct ieee80211_if_sta *ifsta, | |
1136 | struct ieee80211_mgmt *mgmt, | |
1137 | size_t len, | |
1138 | int reassoc) | |
1139 | { | |
1140 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1141 | struct ieee80211_hw_mode *mode; | |
1142 | struct sta_info *sta; | |
1143 | u32 rates; | |
1144 | u16 capab_info, status_code, aid; | |
1145 | struct ieee802_11_elems elems; | |
1146 | u8 *pos; | |
1147 | int i, j; | |
1148 | ||
1149 | /* AssocResp and ReassocResp have identical structure, so process both | |
1150 | * of them in this function. */ | |
1151 | ||
1152 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1153 | printk(KERN_DEBUG "%s: association frame received from " | |
1154 | MAC_FMT ", but not in associate state - ignored\n", | |
1155 | dev->name, MAC_ARG(mgmt->sa)); | |
1156 | return; | |
1157 | } | |
1158 | ||
1159 | if (len < 24 + 6) { | |
1160 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
1161 | "received from " MAC_FMT " - ignored\n", | |
1162 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1163 | return; | |
1164 | } | |
1165 | ||
1166 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1167 | printk(KERN_DEBUG "%s: association frame received from " | |
1168 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1169 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1170 | MAC_ARG(mgmt->bssid)); | |
1171 | return; | |
1172 | } | |
1173 | ||
1174 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1175 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1176 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1177 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1178 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1179 | "set\n", dev->name, aid); | |
1180 | aid &= ~(BIT(15) | BIT(14)); | |
1181 | ||
1182 | printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x " | |
1183 | "status=%d aid=%d)\n", | |
1184 | dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa), | |
1185 | capab_info, status_code, aid); | |
1186 | ||
1187 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1188 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1189 | dev->name, status_code); | |
f11b0f0e ZY |
1190 | if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC) |
1191 | ifsta->prev_bssid_set = 0; | |
f0706e82 JB |
1192 | return; |
1193 | } | |
1194 | ||
1195 | pos = mgmt->u.assoc_resp.variable; | |
1196 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
1197 | == ParseFailed) { | |
1198 | printk(KERN_DEBUG "%s: failed to parse AssocResp\n", | |
1199 | dev->name); | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | if (!elems.supp_rates) { | |
1204 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1205 | dev->name); | |
1206 | return; | |
1207 | } | |
1208 | ||
5628221c DD |
1209 | /* it probably doesn't, but if the frame includes an ERP value then |
1210 | * update our stored copy */ | |
1211 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1212 | struct ieee80211_sta_bss *bss | |
1213 | = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1214 | if (bss) { | |
1215 | bss->erp_value = elems.erp_info[0]; | |
1216 | bss->has_erp_value = 1; | |
1217 | ieee80211_rx_bss_put(dev, bss); | |
1218 | } | |
1219 | } | |
1220 | ||
f0706e82 JB |
1221 | printk(KERN_DEBUG "%s: associated\n", dev->name); |
1222 | ifsta->aid = aid; | |
1223 | ifsta->ap_capab = capab_info; | |
1224 | ||
1225 | kfree(ifsta->assocresp_ies); | |
1226 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1227 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC); | |
1228 | if (ifsta->assocresp_ies) | |
1229 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1230 | ||
1231 | ieee80211_set_associated(dev, ifsta, 1); | |
1232 | ||
1233 | /* Add STA entry for the AP */ | |
1234 | sta = sta_info_get(local, ifsta->bssid); | |
1235 | if (!sta) { | |
1236 | struct ieee80211_sta_bss *bss; | |
1237 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC); | |
1238 | if (!sta) { | |
1239 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1240 | " AP\n", dev->name); | |
1241 | return; | |
1242 | } | |
1243 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1244 | if (bss) { | |
1245 | sta->last_rssi = bss->rssi; | |
1246 | sta->last_signal = bss->signal; | |
1247 | sta->last_noise = bss->noise; | |
1248 | ieee80211_rx_bss_put(dev, bss); | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | sta->dev = dev; | |
1253 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; | |
1254 | sta->assoc_ap = 1; | |
1255 | ||
1256 | rates = 0; | |
1257 | mode = local->oper_hw_mode; | |
1258 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1259 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
1260 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1261 | rate *= 2; | |
1262 | for (j = 0; j < mode->num_rates; j++) | |
1263 | if (mode->rates[j].rate == rate) | |
1264 | rates |= BIT(j); | |
1265 | } | |
1266 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1267 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
1268 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1269 | rate *= 2; | |
1270 | for (j = 0; j < mode->num_rates; j++) | |
1271 | if (mode->rates[j].rate == rate) | |
1272 | rates |= BIT(j); | |
1273 | } | |
1274 | sta->supp_rates = rates; | |
1275 | ||
1276 | rate_control_rate_init(sta, local); | |
1277 | ||
1278 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1279 | sta->flags |= WLAN_STA_WME; | |
1280 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1281 | elems.wmm_param_len); | |
1282 | } | |
1283 | ||
1284 | ||
1285 | sta_info_put(sta); | |
1286 | ||
1287 | ieee80211_associated(dev, ifsta); | |
1288 | } | |
1289 | ||
1290 | ||
1291 | /* Caller must hold local->sta_bss_lock */ | |
1292 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1293 | struct ieee80211_sta_bss *bss) | |
1294 | { | |
1295 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1296 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1297 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1298 | } | |
1299 | ||
1300 | ||
1301 | /* Caller must hold local->sta_bss_lock */ | |
1302 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1303 | struct ieee80211_sta_bss *bss) | |
1304 | { | |
1305 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1306 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1307 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1308 | while (b) { | |
1309 | if (b == bss) { | |
1310 | if (!prev) | |
1311 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1312 | bss->hnext; | |
1313 | else | |
1314 | prev->hnext = bss->hnext; | |
1315 | break; | |
1316 | } | |
1317 | prev = b; | |
1318 | b = b->hnext; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | ||
1323 | static struct ieee80211_sta_bss * | |
1324 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid) | |
1325 | { | |
1326 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1327 | struct ieee80211_sta_bss *bss; | |
1328 | ||
dd00cc48 | 1329 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
1330 | if (!bss) |
1331 | return NULL; | |
f0706e82 JB |
1332 | atomic_inc(&bss->users); |
1333 | atomic_inc(&bss->users); | |
1334 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
1335 | ||
1336 | spin_lock_bh(&local->sta_bss_lock); | |
1337 | /* TODO: order by RSSI? */ | |
1338 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1339 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1340 | spin_unlock_bh(&local->sta_bss_lock); | |
1341 | return bss; | |
1342 | } | |
1343 | ||
1344 | ||
1345 | static struct ieee80211_sta_bss * | |
1346 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid) | |
1347 | { | |
1348 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1349 | struct ieee80211_sta_bss *bss; | |
1350 | ||
1351 | spin_lock_bh(&local->sta_bss_lock); | |
1352 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1353 | while (bss) { | |
1354 | if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) { | |
1355 | atomic_inc(&bss->users); | |
1356 | break; | |
1357 | } | |
1358 | bss = bss->hnext; | |
1359 | } | |
1360 | spin_unlock_bh(&local->sta_bss_lock); | |
1361 | return bss; | |
1362 | } | |
1363 | ||
1364 | ||
1365 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1366 | { | |
1367 | kfree(bss->wpa_ie); | |
1368 | kfree(bss->rsn_ie); | |
1369 | kfree(bss->wmm_ie); | |
1370 | kfree(bss); | |
1371 | } | |
1372 | ||
1373 | ||
1374 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1375 | struct ieee80211_sta_bss *bss) | |
1376 | { | |
1377 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1378 | if (!atomic_dec_and_test(&bss->users)) | |
1379 | return; | |
1380 | ||
1381 | spin_lock_bh(&local->sta_bss_lock); | |
1382 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1383 | list_del(&bss->list); | |
1384 | spin_unlock_bh(&local->sta_bss_lock); | |
1385 | ieee80211_rx_bss_free(bss); | |
1386 | } | |
1387 | ||
1388 | ||
1389 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1390 | { | |
1391 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1392 | spin_lock_init(&local->sta_bss_lock); | |
1393 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1394 | } | |
1395 | ||
1396 | ||
1397 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1398 | { | |
1399 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1400 | struct ieee80211_sta_bss *bss, *tmp; | |
1401 | ||
1402 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1403 | ieee80211_rx_bss_put(dev, bss); | |
1404 | } | |
1405 | ||
1406 | ||
1407 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1408 | struct ieee80211_mgmt *mgmt, | |
1409 | size_t len, | |
1410 | struct ieee80211_rx_status *rx_status, | |
1411 | int beacon) | |
1412 | { | |
1413 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1414 | struct ieee802_11_elems elems; | |
1415 | size_t baselen; | |
1416 | int channel, invalid = 0, clen; | |
1417 | struct ieee80211_sta_bss *bss; | |
1418 | struct sta_info *sta; | |
1419 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1420 | u64 timestamp; | |
1421 | ||
1422 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1423 | return; /* ignore ProbeResp to foreign address */ | |
1424 | ||
1425 | #if 0 | |
1426 | printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n", | |
1427 | dev->name, beacon ? "Beacon" : "Probe Response", | |
1428 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da)); | |
1429 | #endif | |
1430 | ||
1431 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1432 | if (baselen > len) | |
1433 | return; | |
1434 | ||
1435 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1436 | ||
1437 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && | |
1438 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1439 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1440 | static unsigned long last_tsf_debug = 0; | |
1441 | u64 tsf; | |
1442 | if (local->ops->get_tsf) | |
1443 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1444 | else | |
1445 | tsf = -1LLU; | |
1446 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
1447 | printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID=" | |
1448 | MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld " | |
1449 | "@%lu\n", | |
1450 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid), | |
1451 | (unsigned long long)tsf, | |
1452 | (unsigned long long)timestamp, | |
1453 | (unsigned long long)(tsf - timestamp), | |
1454 | jiffies); | |
1455 | last_tsf_debug = jiffies; | |
1456 | } | |
1457 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1458 | } | |
1459 | ||
1460 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1461 | &elems) == ParseFailed) | |
1462 | invalid = 1; | |
1463 | ||
1464 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && | |
1465 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && | |
1466 | (sta = sta_info_get(local, mgmt->sa))) { | |
1467 | struct ieee80211_hw_mode *mode; | |
1468 | struct ieee80211_rate *rates; | |
1469 | size_t num_rates; | |
1470 | u32 supp_rates, prev_rates; | |
1471 | int i, j; | |
1472 | ||
1473 | mode = local->sta_scanning ? | |
1474 | local->scan_hw_mode : local->oper_hw_mode; | |
1475 | rates = mode->rates; | |
1476 | num_rates = mode->num_rates; | |
1477 | ||
1478 | supp_rates = 0; | |
1479 | for (i = 0; i < elems.supp_rates_len + | |
1480 | elems.ext_supp_rates_len; i++) { | |
1481 | u8 rate = 0; | |
1482 | int own_rate; | |
1483 | if (i < elems.supp_rates_len) | |
1484 | rate = elems.supp_rates[i]; | |
1485 | else if (elems.ext_supp_rates) | |
1486 | rate = elems.ext_supp_rates | |
1487 | [i - elems.supp_rates_len]; | |
1488 | own_rate = 5 * (rate & 0x7f); | |
1489 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1490 | own_rate *= 2; | |
1491 | for (j = 0; j < num_rates; j++) | |
1492 | if (rates[j].rate == own_rate) | |
1493 | supp_rates |= BIT(j); | |
1494 | } | |
1495 | ||
1496 | prev_rates = sta->supp_rates; | |
1497 | sta->supp_rates &= supp_rates; | |
1498 | if (sta->supp_rates == 0) { | |
1499 | /* No matching rates - this should not really happen. | |
1500 | * Make sure that at least one rate is marked | |
1501 | * supported to avoid issues with TX rate ctrl. */ | |
1502 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1503 | } | |
1504 | if (sta->supp_rates != prev_rates) { | |
1505 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
1506 | MAC_FMT " based on beacon info (0x%x & 0x%x -> " | |
1507 | "0x%x)\n", | |
1508 | dev->name, MAC_ARG(sta->addr), prev_rates, | |
1509 | supp_rates, sta->supp_rates); | |
1510 | } | |
1511 | sta_info_put(sta); | |
1512 | } | |
1513 | ||
1514 | if (!elems.ssid) | |
1515 | return; | |
1516 | ||
1517 | if (elems.ds_params && elems.ds_params_len == 1) | |
1518 | channel = elems.ds_params[0]; | |
1519 | else | |
1520 | channel = rx_status->channel; | |
1521 | ||
1522 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid); | |
1523 | if (!bss) { | |
1524 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid); | |
1525 | if (!bss) | |
1526 | return; | |
1527 | } else { | |
1528 | #if 0 | |
1529 | /* TODO: order by RSSI? */ | |
1530 | spin_lock_bh(&local->sta_bss_lock); | |
1531 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1532 | spin_unlock_bh(&local->sta_bss_lock); | |
1533 | #endif | |
1534 | } | |
1535 | ||
1536 | if (bss->probe_resp && beacon) { | |
1537 | /* Do not allow beacon to override data from Probe Response. */ | |
1538 | ieee80211_rx_bss_put(dev, bss); | |
1539 | return; | |
1540 | } | |
1541 | ||
5628221c DD |
1542 | /* save the ERP value so that it is available at association time */ |
1543 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1544 | bss->erp_value = elems.erp_info[0]; | |
1545 | bss->has_erp_value = 1; | |
1546 | } | |
1547 | ||
f0706e82 JB |
1548 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1549 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
1550 | if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { | |
1551 | memcpy(bss->ssid, elems.ssid, elems.ssid_len); | |
1552 | bss->ssid_len = elems.ssid_len; | |
1553 | } | |
1554 | ||
1555 | bss->supp_rates_len = 0; | |
1556 | if (elems.supp_rates) { | |
1557 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1558 | if (clen > elems.supp_rates_len) | |
1559 | clen = elems.supp_rates_len; | |
1560 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1561 | clen); | |
1562 | bss->supp_rates_len += clen; | |
1563 | } | |
1564 | if (elems.ext_supp_rates) { | |
1565 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1566 | if (clen > elems.ext_supp_rates_len) | |
1567 | clen = elems.ext_supp_rates_len; | |
1568 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1569 | elems.ext_supp_rates, clen); | |
1570 | bss->supp_rates_len += clen; | |
1571 | } | |
1572 | ||
1573 | if (elems.wpa && | |
1574 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1575 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1576 | kfree(bss->wpa_ie); | |
1577 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1578 | if (bss->wpa_ie) { | |
1579 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1580 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1581 | } else | |
1582 | bss->wpa_ie_len = 0; | |
1583 | } else if (!elems.wpa && bss->wpa_ie) { | |
1584 | kfree(bss->wpa_ie); | |
1585 | bss->wpa_ie = NULL; | |
1586 | bss->wpa_ie_len = 0; | |
1587 | } | |
1588 | ||
1589 | if (elems.rsn && | |
1590 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
1591 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
1592 | kfree(bss->rsn_ie); | |
1593 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
1594 | if (bss->rsn_ie) { | |
1595 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
1596 | bss->rsn_ie_len = elems.rsn_len + 2; | |
1597 | } else | |
1598 | bss->rsn_ie_len = 0; | |
1599 | } else if (!elems.rsn && bss->rsn_ie) { | |
1600 | kfree(bss->rsn_ie); | |
1601 | bss->rsn_ie = NULL; | |
1602 | bss->rsn_ie_len = 0; | |
1603 | } | |
1604 | ||
1605 | if (elems.wmm_param && | |
1606 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
1607 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
1608 | kfree(bss->wmm_ie); | |
1609 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
1610 | if (bss->wmm_ie) { | |
1611 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
1612 | elems.wmm_param_len + 2); | |
1613 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
1614 | } else | |
1615 | bss->wmm_ie_len = 0; | |
1616 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
1617 | kfree(bss->wmm_ie); | |
1618 | bss->wmm_ie = NULL; | |
1619 | bss->wmm_ie_len = 0; | |
1620 | } | |
1621 | ||
1622 | ||
1623 | bss->hw_mode = rx_status->phymode; | |
1624 | bss->channel = channel; | |
1625 | bss->freq = rx_status->freq; | |
1626 | if (channel != rx_status->channel && | |
1627 | (bss->hw_mode == MODE_IEEE80211G || | |
1628 | bss->hw_mode == MODE_IEEE80211B) && | |
1629 | channel >= 1 && channel <= 14) { | |
1630 | static const int freq_list[] = { | |
1631 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
1632 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
1633 | }; | |
1634 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
1635 | * channels, so map the channel into frequency. */ | |
1636 | bss->freq = freq_list[channel - 1]; | |
1637 | } | |
1638 | bss->timestamp = timestamp; | |
1639 | bss->last_update = jiffies; | |
1640 | bss->rssi = rx_status->ssi; | |
1641 | bss->signal = rx_status->signal; | |
1642 | bss->noise = rx_status->noise; | |
1643 | if (!beacon) | |
1644 | bss->probe_resp++; | |
1645 | ieee80211_rx_bss_put(dev, bss); | |
1646 | } | |
1647 | ||
1648 | ||
1649 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
1650 | struct ieee80211_mgmt *mgmt, | |
1651 | size_t len, | |
1652 | struct ieee80211_rx_status *rx_status) | |
1653 | { | |
1654 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
1655 | } | |
1656 | ||
1657 | ||
1658 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
1659 | struct ieee80211_mgmt *mgmt, | |
1660 | size_t len, | |
1661 | struct ieee80211_rx_status *rx_status) | |
1662 | { | |
f0706e82 JB |
1663 | struct ieee80211_sub_if_data *sdata; |
1664 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
1665 | size_t baselen; |
1666 | struct ieee802_11_elems elems; | |
1667 | ||
1668 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
1669 | ||
1670 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1671 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
1672 | return; | |
1673 | ifsta = &sdata->u.sta; | |
1674 | ||
1675 | if (!ifsta->associated || | |
1676 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1677 | return; | |
1678 | ||
1679 | /* Process beacon from the current BSS */ | |
1680 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1681 | if (baselen > len) | |
1682 | return; | |
1683 | ||
1684 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1685 | &elems) == ParseFailed) | |
1686 | return; | |
1687 | ||
5628221c DD |
1688 | if (elems.erp_info && elems.erp_info_len >= 1) |
1689 | ieee80211_handle_erp_ie(dev, elems.erp_info[0]); | |
f0706e82 JB |
1690 | |
1691 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1692 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1693 | elems.wmm_param_len); | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | ||
1698 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
1699 | struct ieee80211_if_sta *ifsta, | |
1700 | struct ieee80211_mgmt *mgmt, | |
1701 | size_t len, | |
1702 | struct ieee80211_rx_status *rx_status) | |
1703 | { | |
1704 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1705 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1706 | int tx_last_beacon; | |
1707 | struct sk_buff *skb; | |
1708 | struct ieee80211_mgmt *resp; | |
1709 | u8 *pos, *end; | |
1710 | ||
1711 | if (sdata->type != IEEE80211_IF_TYPE_IBSS || | |
1712 | ifsta->state != IEEE80211_IBSS_JOINED || | |
1713 | len < 24 + 2 || !ifsta->probe_resp) | |
1714 | return; | |
1715 | ||
1716 | if (local->ops->tx_last_beacon) | |
1717 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1718 | else | |
1719 | tx_last_beacon = 1; | |
1720 | ||
1721 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1722 | printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID=" | |
1723 | MAC_FMT " (tx_last_beacon=%d)\n", | |
1724 | dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da), | |
1725 | MAC_ARG(mgmt->bssid), tx_last_beacon); | |
1726 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1727 | ||
1728 | if (!tx_last_beacon) | |
1729 | return; | |
1730 | ||
1731 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1732 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1733 | return; | |
1734 | ||
1735 | end = ((u8 *) mgmt) + len; | |
1736 | pos = mgmt->u.probe_req.variable; | |
1737 | if (pos[0] != WLAN_EID_SSID || | |
1738 | pos + 2 + pos[1] > end) { | |
1739 | if (net_ratelimit()) { | |
1740 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
1741 | "from " MAC_FMT "\n", | |
1742 | dev->name, MAC_ARG(mgmt->sa)); | |
1743 | } | |
1744 | return; | |
1745 | } | |
1746 | if (pos[1] != 0 && | |
1747 | (pos[1] != ifsta->ssid_len || | |
1748 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1749 | /* Ignore ProbeReq for foreign SSID */ | |
1750 | return; | |
1751 | } | |
1752 | ||
1753 | /* Reply with ProbeResp */ | |
1754 | skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC); | |
1755 | if (!skb) | |
1756 | return; | |
1757 | ||
1758 | resp = (struct ieee80211_mgmt *) skb->data; | |
1759 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1760 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1761 | printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n", | |
1762 | dev->name, MAC_ARG(resp->da)); | |
1763 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1764 | ieee80211_sta_tx(dev, skb, 0); | |
1765 | } | |
1766 | ||
1767 | ||
1768 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
1769 | struct ieee80211_rx_status *rx_status) | |
1770 | { | |
1771 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1772 | struct ieee80211_sub_if_data *sdata; | |
1773 | struct ieee80211_if_sta *ifsta; | |
1774 | struct ieee80211_mgmt *mgmt; | |
1775 | u16 fc; | |
1776 | ||
1777 | if (skb->len < 24) | |
1778 | goto fail; | |
1779 | ||
1780 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1781 | ifsta = &sdata->u.sta; | |
1782 | ||
1783 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1784 | fc = le16_to_cpu(mgmt->frame_control); | |
1785 | ||
1786 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1787 | case IEEE80211_STYPE_PROBE_REQ: | |
1788 | case IEEE80211_STYPE_PROBE_RESP: | |
1789 | case IEEE80211_STYPE_BEACON: | |
1790 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1791 | case IEEE80211_STYPE_AUTH: | |
1792 | case IEEE80211_STYPE_ASSOC_RESP: | |
1793 | case IEEE80211_STYPE_REASSOC_RESP: | |
1794 | case IEEE80211_STYPE_DEAUTH: | |
1795 | case IEEE80211_STYPE_DISASSOC: | |
1796 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1797 | queue_work(local->hw.workqueue, &ifsta->work); | |
1798 | return; | |
1799 | default: | |
1800 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
1801 | "stype=%d\n", dev->name, | |
1802 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
1803 | break; | |
1804 | } | |
1805 | ||
1806 | fail: | |
1807 | kfree_skb(skb); | |
1808 | } | |
1809 | ||
1810 | ||
1811 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
1812 | struct sk_buff *skb) | |
1813 | { | |
1814 | struct ieee80211_rx_status *rx_status; | |
1815 | struct ieee80211_sub_if_data *sdata; | |
1816 | struct ieee80211_if_sta *ifsta; | |
1817 | struct ieee80211_mgmt *mgmt; | |
1818 | u16 fc; | |
1819 | ||
1820 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1821 | ifsta = &sdata->u.sta; | |
1822 | ||
1823 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1824 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1825 | fc = le16_to_cpu(mgmt->frame_control); | |
1826 | ||
1827 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1828 | case IEEE80211_STYPE_PROBE_REQ: | |
1829 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
1830 | rx_status); | |
1831 | break; | |
1832 | case IEEE80211_STYPE_PROBE_RESP: | |
1833 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
1834 | break; | |
1835 | case IEEE80211_STYPE_BEACON: | |
1836 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
1837 | break; | |
1838 | case IEEE80211_STYPE_AUTH: | |
1839 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
1840 | break; | |
1841 | case IEEE80211_STYPE_ASSOC_RESP: | |
1842 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); | |
1843 | break; | |
1844 | case IEEE80211_STYPE_REASSOC_RESP: | |
1845 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); | |
1846 | break; | |
1847 | case IEEE80211_STYPE_DEAUTH: | |
1848 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
1849 | break; | |
1850 | case IEEE80211_STYPE_DISASSOC: | |
1851 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
1852 | break; | |
1853 | } | |
1854 | ||
1855 | kfree_skb(skb); | |
1856 | } | |
1857 | ||
1858 | ||
1859 | void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
1860 | struct ieee80211_rx_status *rx_status) | |
1861 | { | |
1862 | struct ieee80211_mgmt *mgmt; | |
1863 | u16 fc; | |
1864 | ||
1865 | if (skb->len < 24) { | |
1866 | dev_kfree_skb(skb); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1871 | fc = le16_to_cpu(mgmt->frame_control); | |
1872 | ||
1873 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { | |
1874 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
1875 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
1876 | skb->len, rx_status); | |
1877 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { | |
1878 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
1879 | rx_status); | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | dev_kfree_skb(skb); | |
1884 | } | |
1885 | ||
1886 | ||
1887 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
1888 | { | |
1889 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1890 | int active = 0; | |
1891 | struct sta_info *sta; | |
1892 | ||
be8755e1 | 1893 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
1894 | list_for_each_entry(sta, &local->sta_list, list) { |
1895 | if (sta->dev == dev && | |
1896 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
1897 | jiffies)) { | |
1898 | active++; | |
1899 | break; | |
1900 | } | |
1901 | } | |
be8755e1 | 1902 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
1903 | |
1904 | return active; | |
1905 | } | |
1906 | ||
1907 | ||
1908 | static void ieee80211_sta_expire(struct net_device *dev) | |
1909 | { | |
1910 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1911 | struct sta_info *sta, *tmp; | |
be8755e1 | 1912 | LIST_HEAD(tmp_list); |
f0706e82 | 1913 | |
be8755e1 | 1914 | write_lock_bh(&local->sta_lock); |
f0706e82 JB |
1915 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
1916 | if (time_after(jiffies, sta->last_rx + | |
1917 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
1918 | printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT | |
1919 | "\n", dev->name, MAC_ARG(sta->addr)); | |
be8755e1 MW |
1920 | __sta_info_get(sta); |
1921 | sta_info_remove(sta); | |
1922 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 1923 | } |
be8755e1 MW |
1924 | write_unlock_bh(&local->sta_lock); |
1925 | ||
1926 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
1927 | sta_info_free(sta); | |
1928 | sta_info_put(sta); | |
1929 | } | |
f0706e82 JB |
1930 | } |
1931 | ||
1932 | ||
1933 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
1934 | struct ieee80211_if_sta *ifsta) | |
1935 | { | |
1936 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1937 | ||
1938 | ieee80211_sta_expire(dev); | |
1939 | if (ieee80211_sta_active_ibss(dev)) | |
1940 | return; | |
1941 | ||
1942 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
1943 | "IBSS networks with same SSID (merge)\n", dev->name); | |
1944 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
1945 | } | |
1946 | ||
1947 | ||
1948 | void ieee80211_sta_timer(unsigned long data) | |
1949 | { | |
1950 | struct ieee80211_sub_if_data *sdata = | |
1951 | (struct ieee80211_sub_if_data *) data; | |
1952 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1953 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
1954 | ||
1955 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1956 | queue_work(local->hw.workqueue, &ifsta->work); | |
1957 | } | |
1958 | ||
1959 | ||
1960 | void ieee80211_sta_work(struct work_struct *work) | |
1961 | { | |
1962 | struct ieee80211_sub_if_data *sdata = | |
1963 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
1964 | struct net_device *dev = sdata->dev; | |
1965 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1966 | struct ieee80211_if_sta *ifsta; | |
1967 | struct sk_buff *skb; | |
1968 | ||
1969 | if (!netif_running(dev)) | |
1970 | return; | |
1971 | ||
1972 | if (local->sta_scanning) | |
1973 | return; | |
1974 | ||
1975 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
1976 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
1977 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " | |
1978 | "(type=%d)\n", dev->name, sdata->type); | |
1979 | return; | |
1980 | } | |
1981 | ifsta = &sdata->u.sta; | |
1982 | ||
1983 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
1984 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
1985 | ||
1986 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
1987 | ifsta->state != IEEE80211_ASSOCIATE && | |
1988 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
1989 | ieee80211_sta_start_scan(dev, NULL, 0); | |
1990 | return; | |
1991 | } | |
1992 | ||
1993 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
1994 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
1995 | return; | |
1996 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1997 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
1998 | return; | |
1999 | ||
2000 | switch (ifsta->state) { | |
2001 | case IEEE80211_DISABLED: | |
2002 | break; | |
2003 | case IEEE80211_AUTHENTICATE: | |
2004 | ieee80211_authenticate(dev, ifsta); | |
2005 | break; | |
2006 | case IEEE80211_ASSOCIATE: | |
2007 | ieee80211_associate(dev, ifsta); | |
2008 | break; | |
2009 | case IEEE80211_ASSOCIATED: | |
2010 | ieee80211_associated(dev, ifsta); | |
2011 | break; | |
2012 | case IEEE80211_IBSS_SEARCH: | |
2013 | ieee80211_sta_find_ibss(dev, ifsta); | |
2014 | break; | |
2015 | case IEEE80211_IBSS_JOINED: | |
2016 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2017 | break; | |
2018 | default: | |
2019 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2020 | ifsta->state); | |
2021 | break; | |
2022 | } | |
2023 | ||
2024 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2025 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2026 | "mixed-cell disabled - disassociate\n", dev->name); | |
2027 | ||
2028 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2029 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | ||
2034 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2035 | struct ieee80211_if_sta *ifsta) | |
2036 | { | |
2037 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2038 | ||
2039 | if (local->ops->reset_tsf) { | |
2040 | /* Reset own TSF to allow time synchronization work. */ | |
2041 | local->ops->reset_tsf(local_to_hw(local)); | |
2042 | } | |
2043 | ||
2044 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2045 | ||
2046 | ||
2047 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2048 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2049 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2050 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2051 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2052 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2053 | else | |
2054 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2055 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2056 | ifsta->auth_alg); | |
2057 | ifsta->auth_transaction = -1; | |
2058 | ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0; | |
2059 | netif_carrier_off(dev); | |
2060 | } | |
2061 | ||
2062 | ||
2063 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2064 | struct ieee80211_if_sta *ifsta) | |
2065 | { | |
2066 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2067 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2068 | ||
2069 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2070 | return; | |
2071 | ||
2072 | if ((ifsta->bssid_set || ifsta->auto_bssid_sel) && | |
2073 | (ifsta->ssid_set || ifsta->auto_ssid_sel)) { | |
2074 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2075 | queue_work(local->hw.workqueue, &ifsta->work); | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2080 | const char *ssid, int ssid_len) | |
2081 | { | |
2082 | int tmp, hidden_ssid; | |
2083 | ||
2084 | if (!memcmp(ifsta->ssid, ssid, ssid_len)) | |
2085 | return 1; | |
2086 | ||
2087 | if (ifsta->auto_bssid_sel) | |
2088 | return 0; | |
2089 | ||
2090 | hidden_ssid = 1; | |
2091 | tmp = ssid_len; | |
2092 | while (tmp--) { | |
2093 | if (ssid[tmp] != '\0') { | |
2094 | hidden_ssid = 0; | |
2095 | break; | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2100 | return 1; | |
2101 | ||
2102 | if (ssid_len == 1 && ssid[0] == ' ') | |
2103 | return 1; | |
2104 | ||
2105 | return 0; | |
2106 | } | |
2107 | ||
2108 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2109 | struct ieee80211_if_sta *ifsta) | |
2110 | { | |
2111 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2112 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2113 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2114 | int top_rssi = 0, freq; | |
2115 | ||
f0706e82 JB |
2116 | if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel && |
2117 | !ifsta->auto_ssid_sel) { | |
2118 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2119 | ieee80211_sta_reset_auth(dev, ifsta); |
2120 | return 0; | |
2121 | } | |
2122 | ||
2123 | spin_lock_bh(&local->sta_bss_lock); | |
2124 | freq = local->oper_channel->freq; | |
2125 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2126 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2127 | continue; | |
2128 | ||
2129 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2130 | !!sdata->default_key) | |
2131 | continue; | |
2132 | ||
2133 | if (!ifsta->auto_channel_sel && bss->freq != freq) | |
2134 | continue; | |
2135 | ||
2136 | if (!ifsta->auto_bssid_sel && | |
2137 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2138 | continue; | |
2139 | ||
2140 | if (!ifsta->auto_ssid_sel && | |
2141 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2142 | continue; | |
2143 | ||
2144 | if (!selected || top_rssi < bss->rssi) { | |
2145 | selected = bss; | |
2146 | top_rssi = bss->rssi; | |
2147 | } | |
2148 | } | |
2149 | if (selected) | |
2150 | atomic_inc(&selected->users); | |
2151 | spin_unlock_bh(&local->sta_bss_lock); | |
2152 | ||
2153 | if (selected) { | |
2154 | ieee80211_set_channel(local, -1, selected->freq); | |
2155 | if (!ifsta->ssid_set) | |
2156 | ieee80211_sta_set_ssid(dev, selected->ssid, | |
2157 | selected->ssid_len); | |
2158 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2159 | ieee80211_rx_bss_put(dev, selected); | |
2160 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2161 | ieee80211_sta_reset_auth(dev, ifsta); |
2162 | return 0; | |
2163 | } else { | |
2164 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
b9bf1e60 JL |
2165 | if (ifsta->auto_ssid_sel) |
2166 | ieee80211_sta_start_scan(dev, NULL, 0); | |
2167 | else | |
2168 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
2169 | ifsta->ssid_len); | |
f0706e82 JB |
2170 | ifsta->state = IEEE80211_AUTHENTICATE; |
2171 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2172 | } else | |
2173 | ifsta->state = IEEE80211_DISABLED; | |
2174 | } | |
f0706e82 JB |
2175 | return -1; |
2176 | } | |
2177 | ||
2178 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2179 | struct ieee80211_if_sta *ifsta, | |
2180 | struct ieee80211_sta_bss *bss) | |
2181 | { | |
2182 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2183 | int res, rates, i, j; | |
2184 | struct sk_buff *skb; | |
2185 | struct ieee80211_mgmt *mgmt; | |
2186 | struct ieee80211_tx_control control; | |
2187 | struct ieee80211_rate *rate; | |
2188 | struct ieee80211_hw_mode *mode; | |
2189 | struct rate_control_extra extra; | |
2190 | u8 *pos; | |
2191 | struct ieee80211_sub_if_data *sdata; | |
2192 | ||
2193 | /* Remove possible STA entries from other IBSS networks. */ | |
2194 | sta_info_flush(local, NULL); | |
2195 | ||
2196 | if (local->ops->reset_tsf) { | |
2197 | /* Reset own TSF to allow time synchronization work. */ | |
2198 | local->ops->reset_tsf(local_to_hw(local)); | |
2199 | } | |
2200 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2201 | res = ieee80211_if_config(dev); | |
2202 | if (res) | |
2203 | return res; | |
2204 | ||
2205 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2206 | ||
2207 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2208 | sdata->drop_unencrypted = bss->capability & | |
2209 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2210 | ||
2211 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2212 | ||
2213 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2214 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2215 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2216 | local->hw.conf.freq); | |
2217 | return -1; | |
2218 | } | |
2219 | ||
2220 | /* Set beacon template based on scan results */ | |
2221 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2222 | do { | |
2223 | if (!skb) | |
2224 | break; | |
2225 | ||
2226 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2227 | ||
2228 | mgmt = (struct ieee80211_mgmt *) | |
2229 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2230 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2231 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2232 | IEEE80211_STYPE_BEACON); | |
2233 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2234 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2235 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2236 | mgmt->u.beacon.beacon_int = | |
2237 | cpu_to_le16(local->hw.conf.beacon_int); | |
2238 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2239 | ||
2240 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2241 | *pos++ = WLAN_EID_SSID; | |
2242 | *pos++ = ifsta->ssid_len; | |
2243 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2244 | ||
2245 | rates = bss->supp_rates_len; | |
2246 | if (rates > 8) | |
2247 | rates = 8; | |
2248 | pos = skb_put(skb, 2 + rates); | |
2249 | *pos++ = WLAN_EID_SUPP_RATES; | |
2250 | *pos++ = rates; | |
2251 | memcpy(pos, bss->supp_rates, rates); | |
2252 | ||
2253 | pos = skb_put(skb, 2 + 1); | |
2254 | *pos++ = WLAN_EID_DS_PARAMS; | |
2255 | *pos++ = 1; | |
2256 | *pos++ = bss->channel; | |
2257 | ||
2258 | pos = skb_put(skb, 2 + 2); | |
2259 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2260 | *pos++ = 2; | |
2261 | /* FIX: set ATIM window based on scan results */ | |
2262 | *pos++ = 0; | |
2263 | *pos++ = 0; | |
2264 | ||
2265 | if (bss->supp_rates_len > 8) { | |
2266 | rates = bss->supp_rates_len - 8; | |
2267 | pos = skb_put(skb, 2 + rates); | |
2268 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2269 | *pos++ = rates; | |
2270 | memcpy(pos, &bss->supp_rates[8], rates); | |
2271 | } | |
2272 | ||
2273 | memset(&control, 0, sizeof(control)); | |
2274 | memset(&extra, 0, sizeof(extra)); | |
2275 | extra.mode = local->oper_hw_mode; | |
2276 | rate = rate_control_get_rate(local, dev, skb, &extra); | |
2277 | if (!rate) { | |
2278 | printk(KERN_DEBUG "%s: Failed to determine TX rate " | |
2279 | "for IBSS beacon\n", dev->name); | |
2280 | break; | |
2281 | } | |
2282 | control.tx_rate = (local->short_preamble && | |
2283 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
2284 | rate->val2 : rate->val; | |
2285 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2286 | control.power_level = local->hw.conf.power_level; | |
2287 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2288 | control.retry_limit = 1; | |
2289 | ||
2290 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2291 | if (ifsta->probe_resp) { | |
2292 | mgmt = (struct ieee80211_mgmt *) | |
2293 | ifsta->probe_resp->data; | |
2294 | mgmt->frame_control = | |
2295 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2296 | IEEE80211_STYPE_PROBE_RESP); | |
2297 | } else { | |
2298 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2299 | "template for IBSS\n", dev->name); | |
2300 | } | |
2301 | ||
2302 | if (local->ops->beacon_update && | |
2303 | local->ops->beacon_update(local_to_hw(local), | |
2304 | skb, &control) == 0) { | |
2305 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2306 | "template based on scan results\n", dev->name); | |
2307 | skb = NULL; | |
2308 | } | |
2309 | ||
2310 | rates = 0; | |
2311 | mode = local->oper_hw_mode; | |
2312 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2313 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2314 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2315 | bitrate *= 2; | |
2316 | for (j = 0; j < mode->num_rates; j++) | |
2317 | if (mode->rates[j].rate == bitrate) | |
2318 | rates |= BIT(j); | |
2319 | } | |
2320 | ifsta->supp_rates_bits = rates; | |
2321 | } while (0); | |
2322 | ||
2323 | if (skb) { | |
2324 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2325 | "template\n", dev->name); | |
2326 | dev_kfree_skb(skb); | |
2327 | } | |
2328 | ||
2329 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2330 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2331 | ||
2332 | ieee80211_rx_bss_put(dev, bss); | |
2333 | ||
2334 | return res; | |
2335 | } | |
2336 | ||
2337 | ||
2338 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2339 | struct ieee80211_if_sta *ifsta) | |
2340 | { | |
2341 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2342 | struct ieee80211_sta_bss *bss; | |
2343 | struct ieee80211_sub_if_data *sdata; | |
2344 | struct ieee80211_hw_mode *mode; | |
2345 | u8 bssid[ETH_ALEN], *pos; | |
2346 | int i; | |
2347 | ||
2348 | #if 0 | |
2349 | /* Easier testing, use fixed BSSID. */ | |
2350 | memset(bssid, 0xfe, ETH_ALEN); | |
2351 | #else | |
2352 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2353 | * own MAC address to make sure that devices that do not have proper | |
2354 | * random number generator get different BSSID. */ | |
2355 | get_random_bytes(bssid, ETH_ALEN); | |
2356 | for (i = 0; i < ETH_ALEN; i++) | |
2357 | bssid[i] ^= dev->dev_addr[i]; | |
2358 | bssid[0] &= ~0x01; | |
2359 | bssid[0] |= 0x02; | |
2360 | #endif | |
2361 | ||
2362 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n", | |
2363 | dev->name, MAC_ARG(bssid)); | |
2364 | ||
2365 | bss = ieee80211_rx_bss_add(dev, bssid); | |
2366 | if (!bss) | |
2367 | return -ENOMEM; | |
2368 | ||
2369 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2370 | mode = local->oper_hw_mode; | |
2371 | ||
2372 | if (local->hw.conf.beacon_int == 0) | |
2373 | local->hw.conf.beacon_int = 100; | |
2374 | bss->beacon_int = local->hw.conf.beacon_int; | |
2375 | bss->hw_mode = local->hw.conf.phymode; | |
2376 | bss->channel = local->hw.conf.channel; | |
2377 | bss->freq = local->hw.conf.freq; | |
2378 | bss->last_update = jiffies; | |
2379 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2380 | if (sdata->default_key) { | |
2381 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2382 | } else | |
2383 | sdata->drop_unencrypted = 0; | |
2384 | bss->supp_rates_len = mode->num_rates; | |
2385 | pos = bss->supp_rates; | |
2386 | for (i = 0; i < mode->num_rates; i++) { | |
2387 | int rate = mode->rates[i].rate; | |
2388 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2389 | rate /= 2; | |
2390 | *pos++ = (u8) (rate / 5); | |
2391 | } | |
2392 | ||
2393 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2394 | } | |
2395 | ||
2396 | ||
2397 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2398 | struct ieee80211_if_sta *ifsta) | |
2399 | { | |
2400 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2401 | struct ieee80211_sta_bss *bss; | |
2402 | int found = 0; | |
2403 | u8 bssid[ETH_ALEN]; | |
2404 | int active_ibss; | |
2405 | ||
2406 | if (ifsta->ssid_len == 0) | |
2407 | return -EINVAL; | |
2408 | ||
2409 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2410 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2411 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2412 | dev->name, active_ibss); | |
2413 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2414 | spin_lock_bh(&local->sta_bss_lock); | |
2415 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2416 | if (ifsta->ssid_len != bss->ssid_len || | |
2417 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2418 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2419 | continue; | |
2420 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2421 | printk(KERN_DEBUG " bssid=" MAC_FMT " found\n", | |
2422 | MAC_ARG(bss->bssid)); | |
2423 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2424 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2425 | found = 1; | |
2426 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2427 | break; | |
2428 | } | |
2429 | spin_unlock_bh(&local->sta_bss_lock); | |
2430 | ||
2431 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2432 | printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current " | |
2433 | MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid)); | |
2434 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2435 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
2436 | (bss = ieee80211_rx_bss_get(dev, bssid))) { | |
2437 | printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT | |
2438 | " based on configured SSID\n", | |
2439 | dev->name, MAC_ARG(bssid)); | |
2440 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2441 | } | |
2442 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2443 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2444 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2445 | ||
2446 | /* Selected IBSS not found in current scan results - try to scan */ | |
2447 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2448 | !ieee80211_sta_active_ibss(dev)) { | |
2449 | mod_timer(&ifsta->timer, jiffies + | |
2450 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2451 | } else if (time_after(jiffies, local->last_scan_completed + | |
2452 | IEEE80211_SCAN_INTERVAL)) { | |
2453 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2454 | "join\n", dev->name); | |
2455 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2456 | ifsta->ssid_len); | |
2457 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2458 | int interval = IEEE80211_SCAN_INTERVAL; | |
2459 | ||
2460 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2461 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
2462 | if (ifsta->create_ibss && | |
2463 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) | |
2464 | return ieee80211_sta_create_ibss(dev, ifsta); | |
2465 | if (ifsta->create_ibss) { | |
2466 | printk(KERN_DEBUG "%s: IBSS not allowed on the" | |
2467 | " configured channel %d (%d MHz)\n", | |
2468 | dev->name, local->hw.conf.channel, | |
2469 | local->hw.conf.freq); | |
2470 | } | |
2471 | ||
2472 | /* No IBSS found - decrease scan interval and continue | |
2473 | * scanning. */ | |
2474 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2475 | } | |
2476 | ||
2477 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2478 | mod_timer(&ifsta->timer, jiffies + interval); | |
2479 | return 0; | |
2480 | } | |
2481 | ||
2482 | return 0; | |
2483 | } | |
2484 | ||
2485 | ||
2486 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2487 | { | |
2488 | struct ieee80211_sub_if_data *sdata; | |
2489 | struct ieee80211_if_sta *ifsta; | |
2490 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2491 | ||
2492 | if (len > IEEE80211_MAX_SSID_LEN) | |
2493 | return -EINVAL; | |
2494 | ||
2495 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
2496 | * not defined. */ | |
2497 | if (local->ops->conf_tx) { | |
2498 | struct ieee80211_tx_queue_params qparam; | |
2499 | int i; | |
2500 | ||
2501 | memset(&qparam, 0, sizeof(qparam)); | |
2502 | /* TODO: are these ok defaults for all hw_modes? */ | |
2503 | qparam.aifs = 2; | |
2504 | qparam.cw_min = | |
2505 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
2506 | qparam.cw_max = 1023; | |
2507 | qparam.burst_time = 0; | |
2508 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
2509 | { | |
2510 | local->ops->conf_tx(local_to_hw(local), | |
2511 | i + IEEE80211_TX_QUEUE_DATA0, | |
2512 | &qparam); | |
2513 | } | |
2514 | /* IBSS uses different parameters for Beacon sending */ | |
2515 | qparam.cw_min++; | |
2516 | qparam.cw_min *= 2; | |
2517 | qparam.cw_min--; | |
2518 | local->ops->conf_tx(local_to_hw(local), | |
2519 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
2520 | } | |
2521 | ||
2522 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2523 | ifsta = &sdata->u.sta; | |
2524 | ||
2525 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
2526 | ifsta->prev_bssid_set = 0; | |
2527 | memcpy(ifsta->ssid, ssid, len); | |
2528 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
2529 | ifsta->ssid_len = len; | |
2530 | ||
2531 | ifsta->ssid_set = len ? 1 : 0; | |
2532 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) { | |
2533 | ifsta->ibss_join_req = jiffies; | |
2534 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2535 | return ieee80211_sta_find_ibss(dev, ifsta); | |
2536 | } | |
2537 | return 0; | |
2538 | } | |
2539 | ||
2540 | ||
2541 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
2542 | { | |
2543 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2544 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2545 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2546 | *len = ifsta->ssid_len; | |
2547 | return 0; | |
2548 | } | |
2549 | ||
2550 | ||
2551 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
2552 | { | |
2553 | struct ieee80211_sub_if_data *sdata; | |
2554 | struct ieee80211_if_sta *ifsta; | |
2555 | int res; | |
2556 | ||
2557 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2558 | ifsta = &sdata->u.sta; | |
2559 | ||
2560 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2561 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2562 | res = ieee80211_if_config(dev); | |
2563 | if (res) { | |
2564 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2565 | "the low-level driver\n", dev->name); | |
2566 | return res; | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | if (!is_valid_ether_addr(bssid)) | |
2571 | ifsta->bssid_set = 0; | |
2572 | else | |
2573 | ifsta->bssid_set = 1; | |
2574 | return 0; | |
2575 | } | |
2576 | ||
2577 | ||
2578 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2579 | struct ieee80211_sub_if_data *sdata, | |
2580 | int powersave) | |
2581 | { | |
2582 | struct sk_buff *skb; | |
2583 | struct ieee80211_hdr *nullfunc; | |
2584 | u16 fc; | |
2585 | ||
2586 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2587 | if (!skb) { | |
2588 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2589 | "frame\n", sdata->dev->name); | |
2590 | return; | |
2591 | } | |
2592 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2593 | ||
2594 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2595 | memset(nullfunc, 0, 24); | |
2596 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2597 | IEEE80211_FCTL_TODS; | |
2598 | if (powersave) | |
2599 | fc |= IEEE80211_FCTL_PM; | |
2600 | nullfunc->frame_control = cpu_to_le16(fc); | |
2601 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
2602 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2603 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
2604 | ||
2605 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
2606 | } | |
2607 | ||
2608 | ||
2609 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
2610 | { | |
2611 | struct ieee80211_local *local = hw_to_local(hw); | |
2612 | struct net_device *dev = local->scan_dev; | |
2613 | struct ieee80211_sub_if_data *sdata; | |
2614 | union iwreq_data wrqu; | |
2615 | ||
2616 | local->last_scan_completed = jiffies; | |
2617 | wmb(); | |
2618 | local->sta_scanning = 0; | |
2619 | ||
2620 | if (ieee80211_hw_config(local)) | |
2621 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2622 | "channel after scan\n", dev->name); | |
2623 | ||
2624 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2625 | ieee80211_if_config(dev)) | |
2626 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2627 | "BSSID after scan\n", dev->name); | |
2628 | ||
2629 | memset(&wrqu, 0, sizeof(wrqu)); | |
2630 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
2631 | ||
2632 | read_lock(&local->sub_if_lock); | |
2633 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2634 | |
2635 | /* No need to wake the master device. */ | |
2636 | if (sdata->dev == local->mdev) | |
2637 | continue; | |
2638 | ||
f0706e82 JB |
2639 | if (sdata->type == IEEE80211_IF_TYPE_STA) { |
2640 | if (sdata->u.sta.associated) | |
2641 | ieee80211_send_nullfunc(local, sdata, 0); | |
2642 | ieee80211_sta_timer((unsigned long)sdata); | |
2643 | } | |
14042cbe | 2644 | |
f0706e82 JB |
2645 | netif_wake_queue(sdata->dev); |
2646 | } | |
2647 | read_unlock(&local->sub_if_lock); | |
2648 | ||
2649 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2650 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2651 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2652 | if (!ifsta->bssid_set || | |
2653 | (!ifsta->state == IEEE80211_IBSS_JOINED && | |
2654 | !ieee80211_sta_active_ibss(dev))) | |
2655 | ieee80211_sta_find_ibss(dev, ifsta); | |
2656 | } | |
2657 | } | |
2658 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
2659 | ||
2660 | void ieee80211_sta_scan_work(struct work_struct *work) | |
2661 | { | |
2662 | struct ieee80211_local *local = | |
2663 | container_of(work, struct ieee80211_local, scan_work.work); | |
2664 | struct net_device *dev = local->scan_dev; | |
2665 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2666 | struct ieee80211_hw_mode *mode; | |
2667 | struct ieee80211_channel *chan; | |
2668 | int skip; | |
2669 | unsigned long next_delay = 0; | |
2670 | ||
2671 | if (!local->sta_scanning) | |
2672 | return; | |
2673 | ||
2674 | switch (local->scan_state) { | |
2675 | case SCAN_SET_CHANNEL: | |
2676 | mode = local->scan_hw_mode; | |
2677 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
2678 | local->scan_channel_idx >= mode->num_channels) { | |
2679 | ieee80211_scan_completed(local_to_hw(local)); | |
2680 | return; | |
2681 | } | |
2682 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
2683 | chan = &mode->channels[local->scan_channel_idx]; | |
2684 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
2685 | (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
2686 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || | |
2687 | (local->hw_modes & local->enabled_modes & | |
2688 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
2689 | skip = 1; | |
2690 | ||
2691 | if (!skip) { | |
2692 | #if 0 | |
2693 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
2694 | dev->name, chan->chan, chan->freq); | |
2695 | #endif | |
2696 | ||
2697 | local->scan_channel = chan; | |
2698 | if (ieee80211_hw_config(local)) { | |
2699 | printk(KERN_DEBUG "%s: failed to set channel " | |
2700 | "%d (%d MHz) for scan\n", dev->name, | |
2701 | chan->chan, chan->freq); | |
2702 | skip = 1; | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | local->scan_channel_idx++; | |
2707 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
2708 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
2709 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
2710 | struct ieee80211_hw_mode, | |
2711 | list); | |
2712 | local->scan_channel_idx = 0; | |
2713 | } | |
2714 | } | |
2715 | ||
2716 | if (skip) | |
2717 | break; | |
2718 | ||
2719 | next_delay = IEEE80211_PROBE_DELAY + | |
2720 | usecs_to_jiffies(local->hw.channel_change_time); | |
2721 | local->scan_state = SCAN_SEND_PROBE; | |
2722 | break; | |
2723 | case SCAN_SEND_PROBE: | |
2724 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
2725 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
2726 | local->scan_ssid_len); | |
2727 | next_delay = IEEE80211_CHANNEL_TIME; | |
2728 | } else | |
2729 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
2730 | local->scan_state = SCAN_SET_CHANNEL; | |
2731 | break; | |
2732 | } | |
2733 | ||
2734 | if (local->sta_scanning) | |
2735 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2736 | next_delay); | |
2737 | } | |
2738 | ||
2739 | ||
2740 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
2741 | u8 *ssid, size_t ssid_len) | |
2742 | { | |
2743 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2744 | struct ieee80211_sub_if_data *sdata; | |
2745 | ||
2746 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
2747 | return -EINVAL; | |
2748 | ||
2749 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
2750 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
2751 | * BSSID: MACAddress | |
2752 | * SSID | |
2753 | * ScanType: ACTIVE, PASSIVE | |
2754 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
2755 | * a Probe frame during active scanning | |
2756 | * ChannelList | |
2757 | * MinChannelTime (>= ProbeDelay), in TU | |
2758 | * MaxChannelTime: (>= MinChannelTime), in TU | |
2759 | */ | |
2760 | ||
2761 | /* MLME-SCAN.confirm | |
2762 | * BSSDescriptionSet | |
2763 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
2764 | */ | |
2765 | ||
2766 | if (local->sta_scanning) { | |
2767 | if (local->scan_dev == dev) | |
2768 | return 0; | |
2769 | return -EBUSY; | |
2770 | } | |
2771 | ||
2772 | if (local->ops->hw_scan) { | |
2773 | int rc = local->ops->hw_scan(local_to_hw(local), | |
2774 | ssid, ssid_len); | |
2775 | if (!rc) { | |
2776 | local->sta_scanning = 1; | |
2777 | local->scan_dev = dev; | |
2778 | } | |
2779 | return rc; | |
2780 | } | |
2781 | ||
2782 | local->sta_scanning = 1; | |
2783 | ||
2784 | read_lock(&local->sub_if_lock); | |
2785 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2786 | |
2787 | /* Don't stop the master interface, otherwise we can't transmit | |
2788 | * probes! */ | |
2789 | if (sdata->dev == local->mdev) | |
2790 | continue; | |
2791 | ||
f0706e82 JB |
2792 | netif_stop_queue(sdata->dev); |
2793 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2794 | sdata->u.sta.associated) | |
2795 | ieee80211_send_nullfunc(local, sdata, 1); | |
2796 | } | |
2797 | read_unlock(&local->sub_if_lock); | |
2798 | ||
2799 | if (ssid) { | |
2800 | local->scan_ssid_len = ssid_len; | |
2801 | memcpy(local->scan_ssid, ssid, ssid_len); | |
2802 | } else | |
2803 | local->scan_ssid_len = 0; | |
2804 | local->scan_state = SCAN_SET_CHANNEL; | |
2805 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
2806 | struct ieee80211_hw_mode, | |
2807 | list); | |
2808 | local->scan_channel_idx = 0; | |
2809 | local->scan_dev = dev; | |
2810 | ||
2811 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2812 | ieee80211_if_config(dev)) | |
2813 | printk(KERN_DEBUG "%s: failed to set BSSID for scan\n", | |
2814 | dev->name); | |
2815 | ||
2816 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
2817 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2818 | IEEE80211_CHANNEL_TIME); | |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | ||
2824 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
2825 | { | |
2826 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2827 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2828 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2829 | ||
2830 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2831 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); | |
2832 | ||
2833 | if (local->sta_scanning) { | |
2834 | if (local->scan_dev == dev) | |
2835 | return 0; | |
2836 | return -EBUSY; | |
2837 | } | |
2838 | ||
2839 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); | |
2840 | queue_work(local->hw.workqueue, &ifsta->work); | |
2841 | return 0; | |
2842 | } | |
2843 | ||
2844 | static char * | |
2845 | ieee80211_sta_scan_result(struct net_device *dev, | |
2846 | struct ieee80211_sta_bss *bss, | |
2847 | char *current_ev, char *end_buf) | |
2848 | { | |
2849 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2850 | struct iw_event iwe; | |
2851 | ||
2852 | if (time_after(jiffies, | |
2853 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2854 | return current_ev; | |
2855 | ||
2856 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
2857 | return current_ev; | |
2858 | ||
2859 | if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY && | |
2860 | !bss->wpa_ie && !bss->rsn_ie) | |
2861 | return current_ev; | |
2862 | ||
2863 | if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID && | |
2864 | (local->scan_ssid_len != bss->ssid_len || | |
2865 | memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0)) | |
2866 | return current_ev; | |
2867 | ||
2868 | memset(&iwe, 0, sizeof(iwe)); | |
2869 | iwe.cmd = SIOCGIWAP; | |
2870 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
2871 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
2872 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2873 | IW_EV_ADDR_LEN); | |
2874 | ||
2875 | memset(&iwe, 0, sizeof(iwe)); | |
2876 | iwe.cmd = SIOCGIWESSID; | |
2877 | iwe.u.data.length = bss->ssid_len; | |
2878 | iwe.u.data.flags = 1; | |
2879 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2880 | bss->ssid); | |
2881 | ||
2882 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
2883 | memset(&iwe, 0, sizeof(iwe)); | |
2884 | iwe.cmd = SIOCGIWMODE; | |
2885 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
2886 | iwe.u.mode = IW_MODE_MASTER; | |
2887 | else | |
2888 | iwe.u.mode = IW_MODE_ADHOC; | |
2889 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2890 | IW_EV_UINT_LEN); | |
2891 | } | |
2892 | ||
2893 | memset(&iwe, 0, sizeof(iwe)); | |
2894 | iwe.cmd = SIOCGIWFREQ; | |
2895 | iwe.u.freq.m = bss->channel; | |
2896 | iwe.u.freq.e = 0; | |
2897 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2898 | IW_EV_FREQ_LEN); | |
2899 | iwe.u.freq.m = bss->freq * 100000; | |
2900 | iwe.u.freq.e = 1; | |
2901 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2902 | IW_EV_FREQ_LEN); | |
2903 | ||
2904 | memset(&iwe, 0, sizeof(iwe)); | |
2905 | iwe.cmd = IWEVQUAL; | |
2906 | iwe.u.qual.qual = bss->signal; | |
2907 | iwe.u.qual.level = bss->rssi; | |
2908 | iwe.u.qual.noise = bss->noise; | |
2909 | iwe.u.qual.updated = local->wstats_flags; | |
2910 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2911 | IW_EV_QUAL_LEN); | |
2912 | ||
2913 | memset(&iwe, 0, sizeof(iwe)); | |
2914 | iwe.cmd = SIOCGIWENCODE; | |
2915 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
2916 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
2917 | else | |
2918 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
2919 | iwe.u.data.length = 0; | |
2920 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
2921 | ||
2922 | if (bss && bss->wpa_ie) { | |
2923 | memset(&iwe, 0, sizeof(iwe)); | |
2924 | iwe.cmd = IWEVGENIE; | |
2925 | iwe.u.data.length = bss->wpa_ie_len; | |
2926 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2927 | bss->wpa_ie); | |
2928 | } | |
2929 | ||
2930 | if (bss && bss->rsn_ie) { | |
2931 | memset(&iwe, 0, sizeof(iwe)); | |
2932 | iwe.cmd = IWEVGENIE; | |
2933 | iwe.u.data.length = bss->rsn_ie_len; | |
2934 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2935 | bss->rsn_ie); | |
2936 | } | |
2937 | ||
2938 | if (bss && bss->supp_rates_len > 0) { | |
2939 | /* display all supported rates in readable format */ | |
2940 | char *p = current_ev + IW_EV_LCP_LEN; | |
2941 | int i; | |
2942 | ||
2943 | memset(&iwe, 0, sizeof(iwe)); | |
2944 | iwe.cmd = SIOCGIWRATE; | |
2945 | /* Those two flags are ignored... */ | |
2946 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
2947 | ||
2948 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2949 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
2950 | 0x7f) * 500000); | |
2951 | p = iwe_stream_add_value(current_ev, p, | |
2952 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
2953 | } | |
2954 | current_ev = p; | |
2955 | } | |
2956 | ||
2957 | if (bss) { | |
2958 | char *buf; | |
2959 | buf = kmalloc(30, GFP_ATOMIC); | |
2960 | if (buf) { | |
2961 | memset(&iwe, 0, sizeof(iwe)); | |
2962 | iwe.cmd = IWEVCUSTOM; | |
2963 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
2964 | iwe.u.data.length = strlen(buf); | |
2965 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
2966 | &iwe, buf); | |
2967 | kfree(buf); | |
2968 | } | |
2969 | } | |
2970 | ||
2971 | do { | |
2972 | char *buf; | |
2973 | ||
2974 | if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO)) | |
2975 | break; | |
2976 | ||
2977 | buf = kmalloc(100, GFP_ATOMIC); | |
2978 | if (!buf) | |
2979 | break; | |
2980 | ||
2981 | memset(&iwe, 0, sizeof(iwe)); | |
2982 | iwe.cmd = IWEVCUSTOM; | |
2983 | sprintf(buf, "bcn_int=%d", bss->beacon_int); | |
2984 | iwe.u.data.length = strlen(buf); | |
2985 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2986 | buf); | |
2987 | ||
2988 | memset(&iwe, 0, sizeof(iwe)); | |
2989 | iwe.cmd = IWEVCUSTOM; | |
2990 | sprintf(buf, "capab=0x%04x", bss->capability); | |
2991 | iwe.u.data.length = strlen(buf); | |
2992 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2993 | buf); | |
2994 | ||
2995 | kfree(buf); | |
2996 | break; | |
2997 | } while (0); | |
2998 | ||
2999 | return current_ev; | |
3000 | } | |
3001 | ||
3002 | ||
3003 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
3004 | { | |
3005 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3006 | char *current_ev = buf; | |
3007 | char *end_buf = buf + len; | |
3008 | struct ieee80211_sta_bss *bss; | |
3009 | ||
3010 | spin_lock_bh(&local->sta_bss_lock); | |
3011 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3012 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3013 | spin_unlock_bh(&local->sta_bss_lock); | |
3014 | return -E2BIG; | |
3015 | } | |
3016 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3017 | end_buf); | |
3018 | } | |
3019 | spin_unlock_bh(&local->sta_bss_lock); | |
3020 | return current_ev - buf; | |
3021 | } | |
3022 | ||
3023 | ||
3024 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3025 | { | |
3026 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3027 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3028 | kfree(ifsta->extra_ie); | |
3029 | if (len == 0) { | |
3030 | ifsta->extra_ie = NULL; | |
3031 | ifsta->extra_ie_len = 0; | |
3032 | return 0; | |
3033 | } | |
3034 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3035 | if (!ifsta->extra_ie) { | |
3036 | ifsta->extra_ie_len = 0; | |
3037 | return -ENOMEM; | |
3038 | } | |
3039 | memcpy(ifsta->extra_ie, ie, len); | |
3040 | ifsta->extra_ie_len = len; | |
3041 | return 0; | |
3042 | } | |
3043 | ||
3044 | ||
3045 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3046 | struct sk_buff *skb, u8 *bssid, | |
3047 | u8 *addr) | |
3048 | { | |
3049 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3050 | struct sta_info *sta; | |
91fa558b | 3051 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
3052 | |
3053 | /* TODO: Could consider removing the least recently used entry and | |
3054 | * allow new one to be added. */ | |
3055 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3056 | if (net_ratelimit()) { | |
3057 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
3058 | "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr)); | |
3059 | } | |
3060 | return NULL; | |
3061 | } | |
3062 | ||
3063 | printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n", | |
3064 | local->mdev->name, MAC_ARG(addr), dev->name); | |
3065 | ||
3066 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3067 | if (!sta) | |
3068 | return NULL; | |
3069 | ||
3070 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3071 | ||
3072 | rate_control_rate_init(sta, local); | |
3073 | ||
3074 | return sta; /* caller will call sta_info_put() */ | |
3075 | } | |
3076 | ||
3077 | ||
3078 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3079 | { | |
3080 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3081 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3082 | ||
3083 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3084 | dev->name, reason); | |
3085 | ||
3086 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
3087 | sdata->type != IEEE80211_IF_TYPE_IBSS) | |
3088 | return -EINVAL; | |
3089 | ||
3090 | ieee80211_send_deauth(dev, ifsta, reason); | |
3091 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3092 | return 0; | |
3093 | } | |
3094 | ||
3095 | ||
3096 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3097 | { | |
3098 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3099 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3100 | ||
3101 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3102 | dev->name, reason); | |
3103 | ||
3104 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3105 | return -EINVAL; | |
3106 | ||
3107 | if (!ifsta->associated) | |
3108 | return -1; | |
3109 | ||
3110 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3111 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3112 | return 0; | |
3113 | } |