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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> | |
28 | #include <linux/rtnetlink.h> | |
29 | #include <net/iw_handler.h> | |
30 | #include <asm/types.h> | |
f0706e82 JB |
31 | |
32 | #include <net/mac80211.h> | |
33 | #include "ieee80211_i.h" | |
34 | #include "ieee80211_rate.h" | |
35 | #include "hostapd_ioctl.h" | |
36 | ||
37 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
38 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
39 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
40 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
41 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
42 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
43 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
44 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
45 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
46 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
47 | ||
48 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
49 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
50 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
51 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
52 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
53 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
54 | ||
55 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
56 | ||
57 | ||
58 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
59 | ||
60 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
61 | ||
62 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
63 | u8 *ssid, size_t ssid_len); | |
64 | static struct ieee80211_sta_bss * | |
65 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid); | |
66 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
67 | struct ieee80211_sta_bss *bss); | |
68 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
69 | struct ieee80211_if_sta *ifsta); | |
70 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
71 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
72 | u8 *ssid, size_t ssid_len); | |
73 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
74 | struct ieee80211_if_sta *ifsta); | |
75 | ||
76 | ||
77 | /* Parsed Information Elements */ | |
78 | struct ieee802_11_elems { | |
5558235c | 79 | /* pointers to IEs */ |
f0706e82 | 80 | u8 *ssid; |
f0706e82 | 81 | u8 *supp_rates; |
f0706e82 | 82 | u8 *fh_params; |
f0706e82 | 83 | u8 *ds_params; |
f0706e82 | 84 | u8 *cf_params; |
f0706e82 | 85 | u8 *tim; |
f0706e82 | 86 | u8 *ibss_params; |
f0706e82 | 87 | u8 *challenge; |
f0706e82 | 88 | u8 *wpa; |
f0706e82 | 89 | u8 *rsn; |
f0706e82 | 90 | u8 *erp_info; |
f0706e82 | 91 | u8 *ext_supp_rates; |
f0706e82 | 92 | u8 *wmm_info; |
f0706e82 | 93 | u8 *wmm_param; |
5558235c JB |
94 | |
95 | /* length of them, respectively */ | |
96 | u8 ssid_len; | |
97 | u8 supp_rates_len; | |
98 | u8 fh_params_len; | |
99 | u8 ds_params_len; | |
100 | u8 cf_params_len; | |
101 | u8 tim_len; | |
102 | u8 ibss_params_len; | |
103 | u8 challenge_len; | |
104 | u8 wpa_len; | |
105 | u8 rsn_len; | |
106 | u8 erp_info_len; | |
107 | u8 ext_supp_rates_len; | |
108 | u8 wmm_info_len; | |
f0706e82 JB |
109 | u8 wmm_param_len; |
110 | }; | |
111 | ||
112 | typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes; | |
113 | ||
114 | ||
115 | static ParseRes ieee802_11_parse_elems(u8 *start, size_t len, | |
116 | struct ieee802_11_elems *elems) | |
117 | { | |
118 | size_t left = len; | |
119 | u8 *pos = start; | |
120 | int unknown = 0; | |
121 | ||
122 | memset(elems, 0, sizeof(*elems)); | |
123 | ||
124 | while (left >= 2) { | |
125 | u8 id, elen; | |
126 | ||
127 | id = *pos++; | |
128 | elen = *pos++; | |
129 | left -= 2; | |
130 | ||
131 | if (elen > left) { | |
132 | #if 0 | |
133 | if (net_ratelimit()) | |
134 | printk(KERN_DEBUG "IEEE 802.11 element parse " | |
135 | "failed (id=%d elen=%d left=%d)\n", | |
136 | id, elen, left); | |
137 | #endif | |
138 | return ParseFailed; | |
139 | } | |
140 | ||
141 | switch (id) { | |
142 | case WLAN_EID_SSID: | |
143 | elems->ssid = pos; | |
144 | elems->ssid_len = elen; | |
145 | break; | |
146 | case WLAN_EID_SUPP_RATES: | |
147 | elems->supp_rates = pos; | |
148 | elems->supp_rates_len = elen; | |
149 | break; | |
150 | case WLAN_EID_FH_PARAMS: | |
151 | elems->fh_params = pos; | |
152 | elems->fh_params_len = elen; | |
153 | break; | |
154 | case WLAN_EID_DS_PARAMS: | |
155 | elems->ds_params = pos; | |
156 | elems->ds_params_len = elen; | |
157 | break; | |
158 | case WLAN_EID_CF_PARAMS: | |
159 | elems->cf_params = pos; | |
160 | elems->cf_params_len = elen; | |
161 | break; | |
162 | case WLAN_EID_TIM: | |
163 | elems->tim = pos; | |
164 | elems->tim_len = elen; | |
165 | break; | |
166 | case WLAN_EID_IBSS_PARAMS: | |
167 | elems->ibss_params = pos; | |
168 | elems->ibss_params_len = elen; | |
169 | break; | |
170 | case WLAN_EID_CHALLENGE: | |
171 | elems->challenge = pos; | |
172 | elems->challenge_len = elen; | |
173 | break; | |
174 | case WLAN_EID_WPA: | |
175 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
176 | pos[2] == 0xf2) { | |
177 | /* Microsoft OUI (00:50:F2) */ | |
178 | if (pos[3] == 1) { | |
179 | /* OUI Type 1 - WPA IE */ | |
180 | elems->wpa = pos; | |
181 | elems->wpa_len = elen; | |
182 | } else if (elen >= 5 && pos[3] == 2) { | |
183 | if (pos[4] == 0) { | |
184 | elems->wmm_info = pos; | |
185 | elems->wmm_info_len = elen; | |
186 | } else if (pos[4] == 1) { | |
187 | elems->wmm_param = pos; | |
188 | elems->wmm_param_len = elen; | |
189 | } | |
190 | } | |
191 | } | |
192 | break; | |
193 | case WLAN_EID_RSN: | |
194 | elems->rsn = pos; | |
195 | elems->rsn_len = elen; | |
196 | break; | |
197 | case WLAN_EID_ERP_INFO: | |
198 | elems->erp_info = pos; | |
199 | elems->erp_info_len = elen; | |
200 | break; | |
201 | case WLAN_EID_EXT_SUPP_RATES: | |
202 | elems->ext_supp_rates = pos; | |
203 | elems->ext_supp_rates_len = elen; | |
204 | break; | |
205 | default: | |
206 | #if 0 | |
207 | printk(KERN_DEBUG "IEEE 802.11 element parse ignored " | |
208 | "unknown element (id=%d elen=%d)\n", | |
209 | id, elen); | |
210 | #endif | |
211 | unknown++; | |
212 | break; | |
213 | } | |
214 | ||
215 | left -= elen; | |
216 | pos += elen; | |
217 | } | |
218 | ||
219 | /* Do not trigger error if left == 1 as Apple Airport base stations | |
220 | * send AssocResps that are one spurious byte too long. */ | |
221 | ||
222 | return unknown ? ParseUnknown : ParseOK; | |
223 | } | |
224 | ||
225 | ||
226 | ||
227 | ||
228 | static int ecw2cw(int ecw) | |
229 | { | |
230 | int cw = 1; | |
231 | while (ecw > 0) { | |
232 | cw <<= 1; | |
233 | ecw--; | |
234 | } | |
235 | return cw - 1; | |
236 | } | |
237 | ||
238 | ||
239 | static void ieee80211_sta_wmm_params(struct net_device *dev, | |
240 | struct ieee80211_if_sta *ifsta, | |
241 | u8 *wmm_param, size_t wmm_param_len) | |
242 | { | |
243 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
244 | struct ieee80211_tx_queue_params params; | |
245 | size_t left; | |
246 | int count; | |
247 | u8 *pos; | |
248 | ||
249 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
250 | return; | |
251 | count = wmm_param[6] & 0x0f; | |
252 | if (count == ifsta->wmm_last_param_set) | |
253 | return; | |
254 | ifsta->wmm_last_param_set = count; | |
255 | ||
256 | pos = wmm_param + 8; | |
257 | left = wmm_param_len - 8; | |
258 | ||
259 | memset(¶ms, 0, sizeof(params)); | |
260 | ||
261 | if (!local->ops->conf_tx) | |
262 | return; | |
263 | ||
264 | local->wmm_acm = 0; | |
265 | for (; left >= 4; left -= 4, pos += 4) { | |
266 | int aci = (pos[0] >> 5) & 0x03; | |
267 | int acm = (pos[0] >> 4) & 0x01; | |
268 | int queue; | |
269 | ||
270 | switch (aci) { | |
271 | case 1: | |
272 | queue = IEEE80211_TX_QUEUE_DATA3; | |
273 | if (acm) { | |
274 | local->wmm_acm |= BIT(0) | BIT(3); | |
275 | } | |
276 | break; | |
277 | case 2: | |
278 | queue = IEEE80211_TX_QUEUE_DATA1; | |
279 | if (acm) { | |
280 | local->wmm_acm |= BIT(4) | BIT(5); | |
281 | } | |
282 | break; | |
283 | case 3: | |
284 | queue = IEEE80211_TX_QUEUE_DATA0; | |
285 | if (acm) { | |
286 | local->wmm_acm |= BIT(6) | BIT(7); | |
287 | } | |
288 | break; | |
289 | case 0: | |
290 | default: | |
291 | queue = IEEE80211_TX_QUEUE_DATA2; | |
292 | if (acm) { | |
293 | local->wmm_acm |= BIT(1) | BIT(2); | |
294 | } | |
295 | break; | |
296 | } | |
297 | ||
298 | params.aifs = pos[0] & 0x0f; | |
299 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
300 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
301 | /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ | |
302 | params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; | |
303 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
304 | "cWmin=%d cWmax=%d burst=%d\n", | |
305 | dev->name, queue, aci, acm, params.aifs, params.cw_min, | |
306 | params.cw_max, params.burst_time); | |
307 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
308 | * AC for now) */ | |
309 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
310 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
311 | "parameters for queue %d\n", dev->name, queue); | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | ||
5628221c DD |
317 | static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) |
318 | { | |
5628221c DD |
319 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
320 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
321 | int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
322 | ||
63fc33ce | 323 | if (use_protection != sdata->use_protection) { |
5628221c DD |
324 | if (net_ratelimit()) { |
325 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
326 | MAC_FMT ")\n", | |
327 | dev->name, | |
328 | use_protection ? "enabled" : "disabled", | |
329 | MAC_ARG(ifsta->bssid)); | |
330 | } | |
63fc33ce | 331 | sdata->use_protection = use_protection; |
5628221c DD |
332 | } |
333 | } | |
334 | ||
335 | ||
f0706e82 JB |
336 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
337 | struct ieee80211_if_sta *ifsta) | |
338 | { | |
339 | char *buf; | |
340 | size_t len; | |
341 | int i; | |
342 | union iwreq_data wrqu; | |
343 | ||
344 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
345 | return; | |
346 | ||
347 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
348 | ifsta->assocresp_ies_len), GFP_ATOMIC); | |
349 | if (!buf) | |
350 | return; | |
351 | ||
352 | len = sprintf(buf, "ASSOCINFO("); | |
353 | if (ifsta->assocreq_ies) { | |
354 | len += sprintf(buf + len, "ReqIEs="); | |
355 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
356 | len += sprintf(buf + len, "%02x", | |
357 | ifsta->assocreq_ies[i]); | |
358 | } | |
359 | } | |
360 | if (ifsta->assocresp_ies) { | |
361 | if (ifsta->assocreq_ies) | |
362 | len += sprintf(buf + len, " "); | |
363 | len += sprintf(buf + len, "RespIEs="); | |
364 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
365 | len += sprintf(buf + len, "%02x", | |
366 | ifsta->assocresp_ies[i]); | |
367 | } | |
368 | } | |
369 | len += sprintf(buf + len, ")"); | |
370 | ||
371 | if (len > IW_CUSTOM_MAX) { | |
372 | len = sprintf(buf, "ASSOCRESPIE="); | |
373 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
374 | len += sprintf(buf + len, "%02x", | |
375 | ifsta->assocresp_ies[i]); | |
376 | } | |
377 | } | |
378 | ||
379 | memset(&wrqu, 0, sizeof(wrqu)); | |
380 | wrqu.data.length = len; | |
381 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
382 | ||
383 | kfree(buf); | |
384 | } | |
385 | ||
386 | ||
387 | static void ieee80211_set_associated(struct net_device *dev, | |
388 | struct ieee80211_if_sta *ifsta, int assoc) | |
389 | { | |
390 | union iwreq_data wrqu; | |
63fc33ce | 391 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
392 | |
393 | if (ifsta->associated == assoc) | |
394 | return; | |
395 | ||
396 | ifsta->associated = assoc; | |
397 | ||
398 | if (assoc) { | |
399 | struct ieee80211_sub_if_data *sdata; | |
5628221c | 400 | struct ieee80211_sta_bss *bss; |
f0706e82 JB |
401 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
402 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
403 | return; | |
5628221c DD |
404 | |
405 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
406 | if (bss) { | |
407 | if (bss->has_erp_value) | |
408 | ieee80211_handle_erp_ie(dev, bss->erp_value); | |
409 | ieee80211_rx_bss_put(dev, bss); | |
410 | } | |
411 | ||
f0706e82 JB |
412 | netif_carrier_on(dev); |
413 | ifsta->prev_bssid_set = 1; | |
414 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
415 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
416 | ieee80211_sta_send_associnfo(dev, ifsta); | |
417 | } else { | |
418 | netif_carrier_off(dev); | |
63fc33ce | 419 | sdata->use_protection = 0; |
f0706e82 JB |
420 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
421 | } | |
422 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
423 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
424 | ifsta->last_probe = jiffies; | |
425 | } | |
426 | ||
427 | static void ieee80211_set_disassoc(struct net_device *dev, | |
428 | struct ieee80211_if_sta *ifsta, int deauth) | |
429 | { | |
430 | if (deauth) | |
431 | ifsta->auth_tries = 0; | |
432 | ifsta->assoc_tries = 0; | |
433 | ieee80211_set_associated(dev, ifsta, 0); | |
434 | } | |
435 | ||
436 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
437 | int encrypt) | |
438 | { | |
439 | struct ieee80211_sub_if_data *sdata; | |
440 | struct ieee80211_tx_packet_data *pkt_data; | |
441 | ||
442 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
443 | skb->dev = sdata->local->mdev; | |
444 | skb_set_mac_header(skb, 0); | |
445 | skb_set_network_header(skb, 0); | |
446 | skb_set_transport_header(skb, 0); | |
447 | ||
448 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
449 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
450 | pkt_data->ifindex = sdata->dev->ifindex; | |
451 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
452 | pkt_data->do_not_encrypt = !encrypt; | |
453 | ||
454 | dev_queue_xmit(skb); | |
455 | } | |
456 | ||
457 | ||
458 | static void ieee80211_send_auth(struct net_device *dev, | |
459 | struct ieee80211_if_sta *ifsta, | |
460 | int transaction, u8 *extra, size_t extra_len, | |
461 | int encrypt) | |
462 | { | |
463 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
464 | struct sk_buff *skb; | |
465 | struct ieee80211_mgmt *mgmt; | |
466 | ||
467 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
468 | sizeof(*mgmt) + 6 + extra_len); | |
469 | if (!skb) { | |
470 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
471 | "frame\n", dev->name); | |
472 | return; | |
473 | } | |
474 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
475 | ||
476 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
477 | memset(mgmt, 0, 24 + 6); | |
478 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
479 | IEEE80211_STYPE_AUTH); | |
480 | if (encrypt) | |
481 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
482 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
483 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
484 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
485 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
486 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
487 | ifsta->auth_transaction = transaction + 1; | |
488 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
489 | if (extra) | |
490 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
491 | ||
492 | ieee80211_sta_tx(dev, skb, encrypt); | |
493 | } | |
494 | ||
495 | ||
496 | static void ieee80211_authenticate(struct net_device *dev, | |
497 | struct ieee80211_if_sta *ifsta) | |
498 | { | |
499 | ifsta->auth_tries++; | |
500 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
501 | printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT | |
502 | " timed out\n", | |
503 | dev->name, MAC_ARG(ifsta->bssid)); | |
504 | ifsta->state = IEEE80211_DISABLED; | |
505 | return; | |
506 | } | |
507 | ||
508 | ifsta->state = IEEE80211_AUTHENTICATE; | |
509 | printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n", | |
510 | dev->name, MAC_ARG(ifsta->bssid)); | |
511 | ||
512 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
513 | ||
514 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
515 | } | |
516 | ||
517 | ||
518 | static void ieee80211_send_assoc(struct net_device *dev, | |
519 | struct ieee80211_if_sta *ifsta) | |
520 | { | |
521 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
522 | struct ieee80211_hw_mode *mode; | |
523 | struct sk_buff *skb; | |
524 | struct ieee80211_mgmt *mgmt; | |
525 | u8 *pos, *ies; | |
526 | int i, len; | |
527 | u16 capab; | |
528 | struct ieee80211_sta_bss *bss; | |
529 | int wmm = 0; | |
530 | ||
531 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
532 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
533 | ifsta->ssid_len); | |
534 | if (!skb) { | |
535 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
536 | "frame\n", dev->name); | |
537 | return; | |
538 | } | |
539 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
540 | ||
541 | mode = local->oper_hw_mode; | |
542 | capab = ifsta->capab; | |
543 | if (mode->mode == MODE_IEEE80211G) { | |
544 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
545 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
546 | } | |
547 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
548 | if (bss) { | |
549 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
550 | capab |= WLAN_CAPABILITY_PRIVACY; | |
551 | if (bss->wmm_ie) { | |
552 | wmm = 1; | |
553 | } | |
554 | ieee80211_rx_bss_put(dev, bss); | |
555 | } | |
556 | ||
557 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
558 | memset(mgmt, 0, 24); | |
559 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
560 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
561 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
562 | ||
563 | if (ifsta->prev_bssid_set) { | |
564 | skb_put(skb, 10); | |
565 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
566 | IEEE80211_STYPE_REASSOC_REQ); | |
567 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
568 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
569 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
570 | ETH_ALEN); | |
571 | } else { | |
572 | skb_put(skb, 4); | |
573 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
574 | IEEE80211_STYPE_ASSOC_REQ); | |
575 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
576 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
577 | } | |
578 | ||
579 | /* SSID */ | |
580 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
581 | *pos++ = WLAN_EID_SSID; | |
582 | *pos++ = ifsta->ssid_len; | |
583 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
584 | ||
585 | len = mode->num_rates; | |
586 | if (len > 8) | |
587 | len = 8; | |
588 | pos = skb_put(skb, len + 2); | |
589 | *pos++ = WLAN_EID_SUPP_RATES; | |
590 | *pos++ = len; | |
591 | for (i = 0; i < len; i++) { | |
592 | int rate = mode->rates[i].rate; | |
593 | if (mode->mode == MODE_ATHEROS_TURBO) | |
594 | rate /= 2; | |
595 | *pos++ = (u8) (rate / 5); | |
596 | } | |
597 | ||
598 | if (mode->num_rates > len) { | |
599 | pos = skb_put(skb, mode->num_rates - len + 2); | |
600 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
601 | *pos++ = mode->num_rates - len; | |
602 | for (i = len; i < mode->num_rates; i++) { | |
603 | int rate = mode->rates[i].rate; | |
604 | if (mode->mode == MODE_ATHEROS_TURBO) | |
605 | rate /= 2; | |
606 | *pos++ = (u8) (rate / 5); | |
607 | } | |
608 | } | |
609 | ||
610 | if (ifsta->extra_ie) { | |
611 | pos = skb_put(skb, ifsta->extra_ie_len); | |
612 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
613 | } | |
614 | ||
615 | if (wmm && ifsta->wmm_enabled) { | |
616 | pos = skb_put(skb, 9); | |
617 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
618 | *pos++ = 7; /* len */ | |
619 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
620 | *pos++ = 0x50; | |
621 | *pos++ = 0xf2; | |
622 | *pos++ = 2; /* WME */ | |
623 | *pos++ = 0; /* WME info */ | |
624 | *pos++ = 1; /* WME ver */ | |
625 | *pos++ = 0; | |
626 | } | |
627 | ||
628 | kfree(ifsta->assocreq_ies); | |
629 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
630 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_ATOMIC); | |
631 | if (ifsta->assocreq_ies) | |
632 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
633 | ||
634 | ieee80211_sta_tx(dev, skb, 0); | |
635 | } | |
636 | ||
637 | ||
638 | static void ieee80211_send_deauth(struct net_device *dev, | |
639 | struct ieee80211_if_sta *ifsta, u16 reason) | |
640 | { | |
641 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
642 | struct sk_buff *skb; | |
643 | struct ieee80211_mgmt *mgmt; | |
644 | ||
645 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
646 | if (!skb) { | |
647 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
648 | "frame\n", dev->name); | |
649 | return; | |
650 | } | |
651 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
652 | ||
653 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
654 | memset(mgmt, 0, 24); | |
655 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
656 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
657 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
658 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
659 | IEEE80211_STYPE_DEAUTH); | |
660 | skb_put(skb, 2); | |
661 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
662 | ||
663 | ieee80211_sta_tx(dev, skb, 0); | |
664 | } | |
665 | ||
666 | ||
667 | static void ieee80211_send_disassoc(struct net_device *dev, | |
668 | struct ieee80211_if_sta *ifsta, u16 reason) | |
669 | { | |
670 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
671 | struct sk_buff *skb; | |
672 | struct ieee80211_mgmt *mgmt; | |
673 | ||
674 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
675 | if (!skb) { | |
676 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
677 | "frame\n", dev->name); | |
678 | return; | |
679 | } | |
680 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
681 | ||
682 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
683 | memset(mgmt, 0, 24); | |
684 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
685 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
686 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
687 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
688 | IEEE80211_STYPE_DISASSOC); | |
689 | skb_put(skb, 2); | |
690 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
691 | ||
692 | ieee80211_sta_tx(dev, skb, 0); | |
693 | } | |
694 | ||
695 | ||
696 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
697 | struct ieee80211_if_sta *ifsta) | |
698 | { | |
699 | struct ieee80211_sta_bss *bss; | |
700 | int res = 0; | |
701 | ||
702 | if (!ifsta || ifsta->mixed_cell || | |
703 | ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE) | |
704 | return 0; | |
705 | ||
706 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
707 | if (!bss) | |
708 | return 0; | |
709 | ||
710 | if (ieee80211_sta_wep_configured(dev) != | |
711 | !!(bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
712 | res = 1; | |
713 | ||
714 | ieee80211_rx_bss_put(dev, bss); | |
715 | ||
716 | return res; | |
717 | } | |
718 | ||
719 | ||
720 | static void ieee80211_associate(struct net_device *dev, | |
721 | struct ieee80211_if_sta *ifsta) | |
722 | { | |
723 | ifsta->assoc_tries++; | |
724 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
725 | printk(KERN_DEBUG "%s: association with AP " MAC_FMT | |
726 | " timed out\n", | |
727 | dev->name, MAC_ARG(ifsta->bssid)); | |
728 | ifsta->state = IEEE80211_DISABLED; | |
729 | return; | |
730 | } | |
731 | ||
732 | ifsta->state = IEEE80211_ASSOCIATE; | |
733 | printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n", | |
734 | dev->name, MAC_ARG(ifsta->bssid)); | |
735 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
736 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
737 | "mixed-cell disabled - abort association\n", dev->name); | |
738 | ifsta->state = IEEE80211_DISABLED; | |
739 | return; | |
740 | } | |
741 | ||
742 | ieee80211_send_assoc(dev, ifsta); | |
743 | ||
744 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
745 | } | |
746 | ||
747 | ||
748 | static void ieee80211_associated(struct net_device *dev, | |
749 | struct ieee80211_if_sta *ifsta) | |
750 | { | |
751 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
752 | struct sta_info *sta; | |
753 | int disassoc; | |
754 | ||
755 | /* TODO: start monitoring current AP signal quality and number of | |
756 | * missed beacons. Scan other channels every now and then and search | |
757 | * for better APs. */ | |
758 | /* TODO: remove expired BSSes */ | |
759 | ||
760 | ifsta->state = IEEE80211_ASSOCIATED; | |
761 | ||
762 | sta = sta_info_get(local, ifsta->bssid); | |
763 | if (!sta) { | |
764 | printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n", | |
765 | dev->name, MAC_ARG(ifsta->bssid)); | |
766 | disassoc = 1; | |
767 | } else { | |
768 | disassoc = 0; | |
769 | if (time_after(jiffies, | |
770 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
771 | if (ifsta->probereq_poll) { | |
772 | printk(KERN_DEBUG "%s: No ProbeResp from " | |
773 | "current AP " MAC_FMT " - assume out of " | |
774 | "range\n", | |
775 | dev->name, MAC_ARG(ifsta->bssid)); | |
776 | disassoc = 1; | |
777 | sta_info_free(sta, 0); | |
778 | ifsta->probereq_poll = 0; | |
779 | } else { | |
780 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
781 | local->scan_ssid, | |
782 | local->scan_ssid_len); | |
783 | ifsta->probereq_poll = 1; | |
784 | } | |
785 | } else { | |
786 | ifsta->probereq_poll = 0; | |
787 | if (time_after(jiffies, ifsta->last_probe + | |
788 | IEEE80211_PROBE_INTERVAL)) { | |
789 | ifsta->last_probe = jiffies; | |
790 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
791 | ifsta->ssid, | |
792 | ifsta->ssid_len); | |
793 | } | |
794 | } | |
795 | sta_info_put(sta); | |
796 | } | |
797 | if (disassoc) { | |
798 | union iwreq_data wrqu; | |
799 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
800 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
801 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
802 | mod_timer(&ifsta->timer, jiffies + | |
803 | IEEE80211_MONITORING_INTERVAL + 30 * HZ); | |
804 | } else { | |
805 | mod_timer(&ifsta->timer, jiffies + | |
806 | IEEE80211_MONITORING_INTERVAL); | |
807 | } | |
808 | } | |
809 | ||
810 | ||
811 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
812 | u8 *ssid, size_t ssid_len) | |
813 | { | |
814 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
815 | struct ieee80211_hw_mode *mode; | |
816 | struct sk_buff *skb; | |
817 | struct ieee80211_mgmt *mgmt; | |
818 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
819 | int i; | |
820 | ||
821 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
822 | if (!skb) { | |
823 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
824 | "request\n", dev->name); | |
825 | return; | |
826 | } | |
827 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
828 | ||
829 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
830 | memset(mgmt, 0, 24); | |
831 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
832 | IEEE80211_STYPE_PROBE_REQ); | |
833 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
834 | if (dst) { | |
835 | memcpy(mgmt->da, dst, ETH_ALEN); | |
836 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
837 | } else { | |
838 | memset(mgmt->da, 0xff, ETH_ALEN); | |
839 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
840 | } | |
841 | pos = skb_put(skb, 2 + ssid_len); | |
842 | *pos++ = WLAN_EID_SSID; | |
843 | *pos++ = ssid_len; | |
844 | memcpy(pos, ssid, ssid_len); | |
845 | ||
846 | supp_rates = skb_put(skb, 2); | |
847 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
848 | supp_rates[1] = 0; | |
849 | mode = local->oper_hw_mode; | |
850 | for (i = 0; i < mode->num_rates; i++) { | |
851 | struct ieee80211_rate *rate = &mode->rates[i]; | |
852 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
853 | continue; | |
854 | if (esupp_rates) { | |
855 | pos = skb_put(skb, 1); | |
856 | esupp_rates[1]++; | |
857 | } else if (supp_rates[1] == 8) { | |
858 | esupp_rates = skb_put(skb, 3); | |
859 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
860 | esupp_rates[1] = 1; | |
861 | pos = &esupp_rates[2]; | |
862 | } else { | |
863 | pos = skb_put(skb, 1); | |
864 | supp_rates[1]++; | |
865 | } | |
866 | if (mode->mode == MODE_ATHEROS_TURBO) | |
867 | *pos = rate->rate / 10; | |
868 | else | |
869 | *pos = rate->rate / 5; | |
870 | } | |
871 | ||
872 | ieee80211_sta_tx(dev, skb, 0); | |
873 | } | |
874 | ||
875 | ||
876 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
877 | { | |
878 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
879 | if (!sdata || !sdata->default_key || | |
880 | sdata->default_key->alg != ALG_WEP) | |
881 | return 0; | |
882 | return 1; | |
883 | } | |
884 | ||
885 | ||
886 | static void ieee80211_auth_completed(struct net_device *dev, | |
887 | struct ieee80211_if_sta *ifsta) | |
888 | { | |
889 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
890 | ifsta->authenticated = 1; | |
891 | ieee80211_associate(dev, ifsta); | |
892 | } | |
893 | ||
894 | ||
895 | static void ieee80211_auth_challenge(struct net_device *dev, | |
896 | struct ieee80211_if_sta *ifsta, | |
897 | struct ieee80211_mgmt *mgmt, | |
898 | size_t len) | |
899 | { | |
900 | u8 *pos; | |
901 | struct ieee802_11_elems elems; | |
902 | ||
903 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
904 | pos = mgmt->u.auth.variable; | |
905 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
906 | == ParseFailed) { | |
907 | printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n", | |
908 | dev->name); | |
909 | return; | |
910 | } | |
911 | if (!elems.challenge) { | |
912 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
913 | "frame\n", dev->name); | |
914 | return; | |
915 | } | |
916 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
917 | elems.challenge_len + 2, 1); | |
918 | } | |
919 | ||
920 | ||
921 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, | |
922 | struct ieee80211_if_sta *ifsta, | |
923 | struct ieee80211_mgmt *mgmt, | |
924 | size_t len) | |
925 | { | |
926 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
927 | u16 auth_alg, auth_transaction, status_code; | |
928 | ||
929 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
930 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
931 | printk(KERN_DEBUG "%s: authentication frame received from " | |
932 | MAC_FMT ", but not in authenticate state - ignored\n", | |
933 | dev->name, MAC_ARG(mgmt->sa)); | |
934 | return; | |
935 | } | |
936 | ||
937 | if (len < 24 + 6) { | |
938 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
939 | "received from " MAC_FMT " - ignored\n", | |
940 | dev->name, len, MAC_ARG(mgmt->sa)); | |
941 | return; | |
942 | } | |
943 | ||
944 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
945 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
946 | printk(KERN_DEBUG "%s: authentication frame received from " | |
947 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
948 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
949 | MAC_ARG(mgmt->bssid)); | |
950 | return; | |
951 | } | |
952 | ||
953 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
954 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { | |
955 | printk(KERN_DEBUG "%s: authentication frame received from " | |
956 | "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
957 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
958 | MAC_ARG(mgmt->bssid)); | |
959 | return; | |
960 | } | |
961 | ||
962 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
963 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
964 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
965 | ||
966 | printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d " | |
967 | "transaction=%d status=%d)\n", | |
968 | dev->name, MAC_ARG(mgmt->sa), auth_alg, | |
969 | auth_transaction, status_code); | |
970 | ||
971 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
972 | /* IEEE 802.11 standard does not require authentication in IBSS | |
973 | * networks and most implementations do not seem to use it. | |
974 | * However, try to reply to authentication attempts if someone | |
975 | * has actually implemented this. | |
976 | * TODO: Could implement shared key authentication. */ | |
977 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
978 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
979 | "frame (alg=%d transaction=%d)\n", | |
980 | dev->name, auth_alg, auth_transaction); | |
981 | return; | |
982 | } | |
983 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
984 | } | |
985 | ||
986 | if (auth_alg != ifsta->auth_alg || | |
987 | auth_transaction != ifsta->auth_transaction) { | |
988 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
989 | "(alg=%d transaction=%d)\n", | |
990 | dev->name, auth_alg, auth_transaction); | |
991 | return; | |
992 | } | |
993 | ||
994 | if (status_code != WLAN_STATUS_SUCCESS) { | |
995 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
996 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
997 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
998 | u8 algs[3]; | |
999 | const int num_algs = ARRAY_SIZE(algs); | |
1000 | int i, pos; | |
1001 | algs[0] = algs[1] = algs[2] = 0xff; | |
1002 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1003 | algs[0] = WLAN_AUTH_OPEN; | |
1004 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1005 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1006 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1007 | algs[2] = WLAN_AUTH_LEAP; | |
1008 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1009 | pos = 0; | |
1010 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1011 | pos = 1; | |
1012 | else | |
1013 | pos = 2; | |
1014 | for (i = 0; i < num_algs; i++) { | |
1015 | pos++; | |
1016 | if (pos >= num_algs) | |
1017 | pos = 0; | |
1018 | if (algs[pos] == ifsta->auth_alg || | |
1019 | algs[pos] == 0xff) | |
1020 | continue; | |
1021 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1022 | !ieee80211_sta_wep_configured(dev)) | |
1023 | continue; | |
1024 | ifsta->auth_alg = algs[pos]; | |
1025 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1026 | "next try\n", | |
1027 | dev->name, ifsta->auth_alg); | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | switch (ifsta->auth_alg) { | |
1035 | case WLAN_AUTH_OPEN: | |
1036 | case WLAN_AUTH_LEAP: | |
1037 | ieee80211_auth_completed(dev, ifsta); | |
1038 | break; | |
1039 | case WLAN_AUTH_SHARED_KEY: | |
1040 | if (ifsta->auth_transaction == 4) | |
1041 | ieee80211_auth_completed(dev, ifsta); | |
1042 | else | |
1043 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1044 | break; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | ||
1049 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1050 | struct ieee80211_if_sta *ifsta, | |
1051 | struct ieee80211_mgmt *mgmt, | |
1052 | size_t len) | |
1053 | { | |
1054 | u16 reason_code; | |
1055 | ||
1056 | if (len < 24 + 2) { | |
1057 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
1058 | "received from " MAC_FMT " - ignored\n", | |
1059 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1060 | return; | |
1061 | } | |
1062 | ||
1063 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1064 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
1065 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1066 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1067 | MAC_ARG(mgmt->bssid)); | |
1068 | return; | |
1069 | } | |
1070 | ||
1071 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1072 | ||
1073 | printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT | |
1074 | " (reason=%d)\n", | |
1075 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1076 | ||
1077 | if (ifsta->authenticated) { | |
1078 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); | |
1079 | } | |
1080 | ||
1081 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1082 | ifsta->state == IEEE80211_ASSOCIATE || | |
1083 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1084 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1085 | mod_timer(&ifsta->timer, jiffies + | |
1086 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1087 | } | |
1088 | ||
1089 | ieee80211_set_disassoc(dev, ifsta, 1); | |
1090 | ifsta->authenticated = 0; | |
1091 | } | |
1092 | ||
1093 | ||
1094 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1095 | struct ieee80211_if_sta *ifsta, | |
1096 | struct ieee80211_mgmt *mgmt, | |
1097 | size_t len) | |
1098 | { | |
1099 | u16 reason_code; | |
1100 | ||
1101 | if (len < 24 + 2) { | |
1102 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
1103 | "received from " MAC_FMT " - ignored\n", | |
1104 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1109 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
1110 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1111 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1112 | MAC_ARG(mgmt->bssid)); | |
1113 | return; | |
1114 | } | |
1115 | ||
1116 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1117 | ||
1118 | printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT | |
1119 | " (reason=%d)\n", | |
1120 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1121 | ||
1122 | if (ifsta->associated) | |
1123 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); | |
1124 | ||
1125 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1126 | ifsta->state = IEEE80211_ASSOCIATE; | |
1127 | mod_timer(&ifsta->timer, jiffies + | |
1128 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1129 | } | |
1130 | ||
1131 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1132 | } | |
1133 | ||
1134 | ||
1135 | static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, | |
1136 | struct ieee80211_if_sta *ifsta, | |
1137 | struct ieee80211_mgmt *mgmt, | |
1138 | size_t len, | |
1139 | int reassoc) | |
1140 | { | |
1141 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1142 | struct ieee80211_hw_mode *mode; | |
1143 | struct sta_info *sta; | |
1144 | u32 rates; | |
1145 | u16 capab_info, status_code, aid; | |
1146 | struct ieee802_11_elems elems; | |
1147 | u8 *pos; | |
1148 | int i, j; | |
1149 | ||
1150 | /* AssocResp and ReassocResp have identical structure, so process both | |
1151 | * of them in this function. */ | |
1152 | ||
1153 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1154 | printk(KERN_DEBUG "%s: association frame received from " | |
1155 | MAC_FMT ", but not in associate state - ignored\n", | |
1156 | dev->name, MAC_ARG(mgmt->sa)); | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | if (len < 24 + 6) { | |
1161 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
1162 | "received from " MAC_FMT " - ignored\n", | |
1163 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1164 | return; | |
1165 | } | |
1166 | ||
1167 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1168 | printk(KERN_DEBUG "%s: association frame received from " | |
1169 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1170 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1171 | MAC_ARG(mgmt->bssid)); | |
1172 | return; | |
1173 | } | |
1174 | ||
1175 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1176 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1177 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1178 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1179 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1180 | "set\n", dev->name, aid); | |
1181 | aid &= ~(BIT(15) | BIT(14)); | |
1182 | ||
1183 | printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x " | |
1184 | "status=%d aid=%d)\n", | |
1185 | dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa), | |
1186 | capab_info, status_code, aid); | |
1187 | ||
1188 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1189 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1190 | dev->name, status_code); | |
f11b0f0e ZY |
1191 | if (status_code == WLAN_STATUS_REASSOC_NO_ASSOC) |
1192 | ifsta->prev_bssid_set = 0; | |
f0706e82 JB |
1193 | return; |
1194 | } | |
1195 | ||
1196 | pos = mgmt->u.assoc_resp.variable; | |
1197 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
1198 | == ParseFailed) { | |
1199 | printk(KERN_DEBUG "%s: failed to parse AssocResp\n", | |
1200 | dev->name); | |
1201 | return; | |
1202 | } | |
1203 | ||
1204 | if (!elems.supp_rates) { | |
1205 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1206 | dev->name); | |
1207 | return; | |
1208 | } | |
1209 | ||
5628221c DD |
1210 | /* it probably doesn't, but if the frame includes an ERP value then |
1211 | * update our stored copy */ | |
1212 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1213 | struct ieee80211_sta_bss *bss | |
1214 | = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1215 | if (bss) { | |
1216 | bss->erp_value = elems.erp_info[0]; | |
1217 | bss->has_erp_value = 1; | |
1218 | ieee80211_rx_bss_put(dev, bss); | |
1219 | } | |
1220 | } | |
1221 | ||
f0706e82 JB |
1222 | printk(KERN_DEBUG "%s: associated\n", dev->name); |
1223 | ifsta->aid = aid; | |
1224 | ifsta->ap_capab = capab_info; | |
1225 | ||
1226 | kfree(ifsta->assocresp_ies); | |
1227 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
1228 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_ATOMIC); | |
1229 | if (ifsta->assocresp_ies) | |
1230 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1231 | ||
1232 | ieee80211_set_associated(dev, ifsta, 1); | |
1233 | ||
1234 | /* Add STA entry for the AP */ | |
1235 | sta = sta_info_get(local, ifsta->bssid); | |
1236 | if (!sta) { | |
1237 | struct ieee80211_sta_bss *bss; | |
1238 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_ATOMIC); | |
1239 | if (!sta) { | |
1240 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1241 | " AP\n", dev->name); | |
1242 | return; | |
1243 | } | |
1244 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1245 | if (bss) { | |
1246 | sta->last_rssi = bss->rssi; | |
1247 | sta->last_signal = bss->signal; | |
1248 | sta->last_noise = bss->noise; | |
1249 | ieee80211_rx_bss_put(dev, bss); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | sta->dev = dev; | |
1254 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; | |
1255 | sta->assoc_ap = 1; | |
1256 | ||
1257 | rates = 0; | |
1258 | mode = local->oper_hw_mode; | |
1259 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1260 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
1261 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1262 | rate *= 2; | |
1263 | for (j = 0; j < mode->num_rates; j++) | |
1264 | if (mode->rates[j].rate == rate) | |
1265 | rates |= BIT(j); | |
1266 | } | |
1267 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1268 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
1269 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1270 | rate *= 2; | |
1271 | for (j = 0; j < mode->num_rates; j++) | |
1272 | if (mode->rates[j].rate == rate) | |
1273 | rates |= BIT(j); | |
1274 | } | |
1275 | sta->supp_rates = rates; | |
1276 | ||
1277 | rate_control_rate_init(sta, local); | |
1278 | ||
1279 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1280 | sta->flags |= WLAN_STA_WME; | |
1281 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1282 | elems.wmm_param_len); | |
1283 | } | |
1284 | ||
1285 | ||
1286 | sta_info_put(sta); | |
1287 | ||
1288 | ieee80211_associated(dev, ifsta); | |
1289 | } | |
1290 | ||
1291 | ||
1292 | /* Caller must hold local->sta_bss_lock */ | |
1293 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1294 | struct ieee80211_sta_bss *bss) | |
1295 | { | |
1296 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1297 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1298 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1299 | } | |
1300 | ||
1301 | ||
1302 | /* Caller must hold local->sta_bss_lock */ | |
1303 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1304 | struct ieee80211_sta_bss *bss) | |
1305 | { | |
1306 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1307 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1308 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1309 | while (b) { | |
1310 | if (b == bss) { | |
1311 | if (!prev) | |
1312 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1313 | bss->hnext; | |
1314 | else | |
1315 | prev->hnext = bss->hnext; | |
1316 | break; | |
1317 | } | |
1318 | prev = b; | |
1319 | b = b->hnext; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | ||
1324 | static struct ieee80211_sta_bss * | |
1325 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid) | |
1326 | { | |
1327 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1328 | struct ieee80211_sta_bss *bss; | |
1329 | ||
1330 | bss = kmalloc(sizeof(*bss), GFP_ATOMIC); | |
1331 | if (!bss) | |
1332 | return NULL; | |
1333 | memset(bss, 0, sizeof(*bss)); | |
1334 | atomic_inc(&bss->users); | |
1335 | atomic_inc(&bss->users); | |
1336 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
1337 | ||
1338 | spin_lock_bh(&local->sta_bss_lock); | |
1339 | /* TODO: order by RSSI? */ | |
1340 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1341 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1342 | spin_unlock_bh(&local->sta_bss_lock); | |
1343 | return bss; | |
1344 | } | |
1345 | ||
1346 | ||
1347 | static struct ieee80211_sta_bss * | |
1348 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid) | |
1349 | { | |
1350 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1351 | struct ieee80211_sta_bss *bss; | |
1352 | ||
1353 | spin_lock_bh(&local->sta_bss_lock); | |
1354 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1355 | while (bss) { | |
1356 | if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) { | |
1357 | atomic_inc(&bss->users); | |
1358 | break; | |
1359 | } | |
1360 | bss = bss->hnext; | |
1361 | } | |
1362 | spin_unlock_bh(&local->sta_bss_lock); | |
1363 | return bss; | |
1364 | } | |
1365 | ||
1366 | ||
1367 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1368 | { | |
1369 | kfree(bss->wpa_ie); | |
1370 | kfree(bss->rsn_ie); | |
1371 | kfree(bss->wmm_ie); | |
1372 | kfree(bss); | |
1373 | } | |
1374 | ||
1375 | ||
1376 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1377 | struct ieee80211_sta_bss *bss) | |
1378 | { | |
1379 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1380 | if (!atomic_dec_and_test(&bss->users)) | |
1381 | return; | |
1382 | ||
1383 | spin_lock_bh(&local->sta_bss_lock); | |
1384 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1385 | list_del(&bss->list); | |
1386 | spin_unlock_bh(&local->sta_bss_lock); | |
1387 | ieee80211_rx_bss_free(bss); | |
1388 | } | |
1389 | ||
1390 | ||
1391 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1392 | { | |
1393 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1394 | spin_lock_init(&local->sta_bss_lock); | |
1395 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1396 | } | |
1397 | ||
1398 | ||
1399 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1400 | { | |
1401 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1402 | struct ieee80211_sta_bss *bss, *tmp; | |
1403 | ||
1404 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1405 | ieee80211_rx_bss_put(dev, bss); | |
1406 | } | |
1407 | ||
1408 | ||
1409 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1410 | struct ieee80211_mgmt *mgmt, | |
1411 | size_t len, | |
1412 | struct ieee80211_rx_status *rx_status, | |
1413 | int beacon) | |
1414 | { | |
1415 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1416 | struct ieee802_11_elems elems; | |
1417 | size_t baselen; | |
1418 | int channel, invalid = 0, clen; | |
1419 | struct ieee80211_sta_bss *bss; | |
1420 | struct sta_info *sta; | |
1421 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1422 | u64 timestamp; | |
1423 | ||
1424 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1425 | return; /* ignore ProbeResp to foreign address */ | |
1426 | ||
1427 | #if 0 | |
1428 | printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n", | |
1429 | dev->name, beacon ? "Beacon" : "Probe Response", | |
1430 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da)); | |
1431 | #endif | |
1432 | ||
1433 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1434 | if (baselen > len) | |
1435 | return; | |
1436 | ||
1437 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1438 | ||
1439 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && | |
1440 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1441 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1442 | static unsigned long last_tsf_debug = 0; | |
1443 | u64 tsf; | |
1444 | if (local->ops->get_tsf) | |
1445 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1446 | else | |
1447 | tsf = -1LLU; | |
1448 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
1449 | printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID=" | |
1450 | MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld " | |
1451 | "@%lu\n", | |
1452 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid), | |
1453 | (unsigned long long)tsf, | |
1454 | (unsigned long long)timestamp, | |
1455 | (unsigned long long)(tsf - timestamp), | |
1456 | jiffies); | |
1457 | last_tsf_debug = jiffies; | |
1458 | } | |
1459 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1460 | } | |
1461 | ||
1462 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1463 | &elems) == ParseFailed) | |
1464 | invalid = 1; | |
1465 | ||
1466 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && | |
1467 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && | |
1468 | (sta = sta_info_get(local, mgmt->sa))) { | |
1469 | struct ieee80211_hw_mode *mode; | |
1470 | struct ieee80211_rate *rates; | |
1471 | size_t num_rates; | |
1472 | u32 supp_rates, prev_rates; | |
1473 | int i, j; | |
1474 | ||
1475 | mode = local->sta_scanning ? | |
1476 | local->scan_hw_mode : local->oper_hw_mode; | |
1477 | rates = mode->rates; | |
1478 | num_rates = mode->num_rates; | |
1479 | ||
1480 | supp_rates = 0; | |
1481 | for (i = 0; i < elems.supp_rates_len + | |
1482 | elems.ext_supp_rates_len; i++) { | |
1483 | u8 rate = 0; | |
1484 | int own_rate; | |
1485 | if (i < elems.supp_rates_len) | |
1486 | rate = elems.supp_rates[i]; | |
1487 | else if (elems.ext_supp_rates) | |
1488 | rate = elems.ext_supp_rates | |
1489 | [i - elems.supp_rates_len]; | |
1490 | own_rate = 5 * (rate & 0x7f); | |
1491 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1492 | own_rate *= 2; | |
1493 | for (j = 0; j < num_rates; j++) | |
1494 | if (rates[j].rate == own_rate) | |
1495 | supp_rates |= BIT(j); | |
1496 | } | |
1497 | ||
1498 | prev_rates = sta->supp_rates; | |
1499 | sta->supp_rates &= supp_rates; | |
1500 | if (sta->supp_rates == 0) { | |
1501 | /* No matching rates - this should not really happen. | |
1502 | * Make sure that at least one rate is marked | |
1503 | * supported to avoid issues with TX rate ctrl. */ | |
1504 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1505 | } | |
1506 | if (sta->supp_rates != prev_rates) { | |
1507 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
1508 | MAC_FMT " based on beacon info (0x%x & 0x%x -> " | |
1509 | "0x%x)\n", | |
1510 | dev->name, MAC_ARG(sta->addr), prev_rates, | |
1511 | supp_rates, sta->supp_rates); | |
1512 | } | |
1513 | sta_info_put(sta); | |
1514 | } | |
1515 | ||
1516 | if (!elems.ssid) | |
1517 | return; | |
1518 | ||
1519 | if (elems.ds_params && elems.ds_params_len == 1) | |
1520 | channel = elems.ds_params[0]; | |
1521 | else | |
1522 | channel = rx_status->channel; | |
1523 | ||
1524 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid); | |
1525 | if (!bss) { | |
1526 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid); | |
1527 | if (!bss) | |
1528 | return; | |
1529 | } else { | |
1530 | #if 0 | |
1531 | /* TODO: order by RSSI? */ | |
1532 | spin_lock_bh(&local->sta_bss_lock); | |
1533 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1534 | spin_unlock_bh(&local->sta_bss_lock); | |
1535 | #endif | |
1536 | } | |
1537 | ||
1538 | if (bss->probe_resp && beacon) { | |
1539 | /* Do not allow beacon to override data from Probe Response. */ | |
1540 | ieee80211_rx_bss_put(dev, bss); | |
1541 | return; | |
1542 | } | |
1543 | ||
5628221c DD |
1544 | /* save the ERP value so that it is available at association time */ |
1545 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1546 | bss->erp_value = elems.erp_info[0]; | |
1547 | bss->has_erp_value = 1; | |
1548 | } | |
1549 | ||
f0706e82 JB |
1550 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1551 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
1552 | if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { | |
1553 | memcpy(bss->ssid, elems.ssid, elems.ssid_len); | |
1554 | bss->ssid_len = elems.ssid_len; | |
1555 | } | |
1556 | ||
1557 | bss->supp_rates_len = 0; | |
1558 | if (elems.supp_rates) { | |
1559 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1560 | if (clen > elems.supp_rates_len) | |
1561 | clen = elems.supp_rates_len; | |
1562 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1563 | clen); | |
1564 | bss->supp_rates_len += clen; | |
1565 | } | |
1566 | if (elems.ext_supp_rates) { | |
1567 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1568 | if (clen > elems.ext_supp_rates_len) | |
1569 | clen = elems.ext_supp_rates_len; | |
1570 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1571 | elems.ext_supp_rates, clen); | |
1572 | bss->supp_rates_len += clen; | |
1573 | } | |
1574 | ||
1575 | if (elems.wpa && | |
1576 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1577 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1578 | kfree(bss->wpa_ie); | |
1579 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1580 | if (bss->wpa_ie) { | |
1581 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1582 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1583 | } else | |
1584 | bss->wpa_ie_len = 0; | |
1585 | } else if (!elems.wpa && bss->wpa_ie) { | |
1586 | kfree(bss->wpa_ie); | |
1587 | bss->wpa_ie = NULL; | |
1588 | bss->wpa_ie_len = 0; | |
1589 | } | |
1590 | ||
1591 | if (elems.rsn && | |
1592 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
1593 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
1594 | kfree(bss->rsn_ie); | |
1595 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
1596 | if (bss->rsn_ie) { | |
1597 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
1598 | bss->rsn_ie_len = elems.rsn_len + 2; | |
1599 | } else | |
1600 | bss->rsn_ie_len = 0; | |
1601 | } else if (!elems.rsn && bss->rsn_ie) { | |
1602 | kfree(bss->rsn_ie); | |
1603 | bss->rsn_ie = NULL; | |
1604 | bss->rsn_ie_len = 0; | |
1605 | } | |
1606 | ||
1607 | if (elems.wmm_param && | |
1608 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
1609 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
1610 | kfree(bss->wmm_ie); | |
1611 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
1612 | if (bss->wmm_ie) { | |
1613 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
1614 | elems.wmm_param_len + 2); | |
1615 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
1616 | } else | |
1617 | bss->wmm_ie_len = 0; | |
1618 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
1619 | kfree(bss->wmm_ie); | |
1620 | bss->wmm_ie = NULL; | |
1621 | bss->wmm_ie_len = 0; | |
1622 | } | |
1623 | ||
1624 | ||
1625 | bss->hw_mode = rx_status->phymode; | |
1626 | bss->channel = channel; | |
1627 | bss->freq = rx_status->freq; | |
1628 | if (channel != rx_status->channel && | |
1629 | (bss->hw_mode == MODE_IEEE80211G || | |
1630 | bss->hw_mode == MODE_IEEE80211B) && | |
1631 | channel >= 1 && channel <= 14) { | |
1632 | static const int freq_list[] = { | |
1633 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
1634 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
1635 | }; | |
1636 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
1637 | * channels, so map the channel into frequency. */ | |
1638 | bss->freq = freq_list[channel - 1]; | |
1639 | } | |
1640 | bss->timestamp = timestamp; | |
1641 | bss->last_update = jiffies; | |
1642 | bss->rssi = rx_status->ssi; | |
1643 | bss->signal = rx_status->signal; | |
1644 | bss->noise = rx_status->noise; | |
1645 | if (!beacon) | |
1646 | bss->probe_resp++; | |
1647 | ieee80211_rx_bss_put(dev, bss); | |
1648 | } | |
1649 | ||
1650 | ||
1651 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
1652 | struct ieee80211_mgmt *mgmt, | |
1653 | size_t len, | |
1654 | struct ieee80211_rx_status *rx_status) | |
1655 | { | |
1656 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
1657 | } | |
1658 | ||
1659 | ||
1660 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
1661 | struct ieee80211_mgmt *mgmt, | |
1662 | size_t len, | |
1663 | struct ieee80211_rx_status *rx_status) | |
1664 | { | |
f0706e82 JB |
1665 | struct ieee80211_sub_if_data *sdata; |
1666 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
1667 | size_t baselen; |
1668 | struct ieee802_11_elems elems; | |
1669 | ||
1670 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
1671 | ||
1672 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1673 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
1674 | return; | |
1675 | ifsta = &sdata->u.sta; | |
1676 | ||
1677 | if (!ifsta->associated || | |
1678 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1679 | return; | |
1680 | ||
1681 | /* Process beacon from the current BSS */ | |
1682 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1683 | if (baselen > len) | |
1684 | return; | |
1685 | ||
1686 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1687 | &elems) == ParseFailed) | |
1688 | return; | |
1689 | ||
5628221c DD |
1690 | if (elems.erp_info && elems.erp_info_len >= 1) |
1691 | ieee80211_handle_erp_ie(dev, elems.erp_info[0]); | |
f0706e82 JB |
1692 | |
1693 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1694 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1695 | elems.wmm_param_len); | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | ||
1700 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
1701 | struct ieee80211_if_sta *ifsta, | |
1702 | struct ieee80211_mgmt *mgmt, | |
1703 | size_t len, | |
1704 | struct ieee80211_rx_status *rx_status) | |
1705 | { | |
1706 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1707 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1708 | int tx_last_beacon; | |
1709 | struct sk_buff *skb; | |
1710 | struct ieee80211_mgmt *resp; | |
1711 | u8 *pos, *end; | |
1712 | ||
1713 | if (sdata->type != IEEE80211_IF_TYPE_IBSS || | |
1714 | ifsta->state != IEEE80211_IBSS_JOINED || | |
1715 | len < 24 + 2 || !ifsta->probe_resp) | |
1716 | return; | |
1717 | ||
1718 | if (local->ops->tx_last_beacon) | |
1719 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1720 | else | |
1721 | tx_last_beacon = 1; | |
1722 | ||
1723 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1724 | printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID=" | |
1725 | MAC_FMT " (tx_last_beacon=%d)\n", | |
1726 | dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da), | |
1727 | MAC_ARG(mgmt->bssid), tx_last_beacon); | |
1728 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1729 | ||
1730 | if (!tx_last_beacon) | |
1731 | return; | |
1732 | ||
1733 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1734 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1735 | return; | |
1736 | ||
1737 | end = ((u8 *) mgmt) + len; | |
1738 | pos = mgmt->u.probe_req.variable; | |
1739 | if (pos[0] != WLAN_EID_SSID || | |
1740 | pos + 2 + pos[1] > end) { | |
1741 | if (net_ratelimit()) { | |
1742 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
1743 | "from " MAC_FMT "\n", | |
1744 | dev->name, MAC_ARG(mgmt->sa)); | |
1745 | } | |
1746 | return; | |
1747 | } | |
1748 | if (pos[1] != 0 && | |
1749 | (pos[1] != ifsta->ssid_len || | |
1750 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1751 | /* Ignore ProbeReq for foreign SSID */ | |
1752 | return; | |
1753 | } | |
1754 | ||
1755 | /* Reply with ProbeResp */ | |
1756 | skb = skb_copy(ifsta->probe_resp, GFP_ATOMIC); | |
1757 | if (!skb) | |
1758 | return; | |
1759 | ||
1760 | resp = (struct ieee80211_mgmt *) skb->data; | |
1761 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1762 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1763 | printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n", | |
1764 | dev->name, MAC_ARG(resp->da)); | |
1765 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1766 | ieee80211_sta_tx(dev, skb, 0); | |
1767 | } | |
1768 | ||
1769 | ||
1770 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
1771 | struct ieee80211_rx_status *rx_status) | |
1772 | { | |
1773 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1774 | struct ieee80211_sub_if_data *sdata; | |
1775 | struct ieee80211_if_sta *ifsta; | |
1776 | struct ieee80211_mgmt *mgmt; | |
1777 | u16 fc; | |
1778 | ||
1779 | if (skb->len < 24) | |
1780 | goto fail; | |
1781 | ||
1782 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1783 | ifsta = &sdata->u.sta; | |
1784 | ||
1785 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1786 | fc = le16_to_cpu(mgmt->frame_control); | |
1787 | ||
1788 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1789 | case IEEE80211_STYPE_PROBE_REQ: | |
1790 | case IEEE80211_STYPE_PROBE_RESP: | |
1791 | case IEEE80211_STYPE_BEACON: | |
1792 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1793 | case IEEE80211_STYPE_AUTH: | |
1794 | case IEEE80211_STYPE_ASSOC_RESP: | |
1795 | case IEEE80211_STYPE_REASSOC_RESP: | |
1796 | case IEEE80211_STYPE_DEAUTH: | |
1797 | case IEEE80211_STYPE_DISASSOC: | |
1798 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1799 | queue_work(local->hw.workqueue, &ifsta->work); | |
1800 | return; | |
1801 | default: | |
1802 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
1803 | "stype=%d\n", dev->name, | |
1804 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
1805 | break; | |
1806 | } | |
1807 | ||
1808 | fail: | |
1809 | kfree_skb(skb); | |
1810 | } | |
1811 | ||
1812 | ||
1813 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
1814 | struct sk_buff *skb) | |
1815 | { | |
1816 | struct ieee80211_rx_status *rx_status; | |
1817 | struct ieee80211_sub_if_data *sdata; | |
1818 | struct ieee80211_if_sta *ifsta; | |
1819 | struct ieee80211_mgmt *mgmt; | |
1820 | u16 fc; | |
1821 | ||
1822 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1823 | ifsta = &sdata->u.sta; | |
1824 | ||
1825 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1826 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1827 | fc = le16_to_cpu(mgmt->frame_control); | |
1828 | ||
1829 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1830 | case IEEE80211_STYPE_PROBE_REQ: | |
1831 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
1832 | rx_status); | |
1833 | break; | |
1834 | case IEEE80211_STYPE_PROBE_RESP: | |
1835 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
1836 | break; | |
1837 | case IEEE80211_STYPE_BEACON: | |
1838 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
1839 | break; | |
1840 | case IEEE80211_STYPE_AUTH: | |
1841 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
1842 | break; | |
1843 | case IEEE80211_STYPE_ASSOC_RESP: | |
1844 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); | |
1845 | break; | |
1846 | case IEEE80211_STYPE_REASSOC_RESP: | |
1847 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); | |
1848 | break; | |
1849 | case IEEE80211_STYPE_DEAUTH: | |
1850 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
1851 | break; | |
1852 | case IEEE80211_STYPE_DISASSOC: | |
1853 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
1854 | break; | |
1855 | } | |
1856 | ||
1857 | kfree_skb(skb); | |
1858 | } | |
1859 | ||
1860 | ||
1861 | void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
1862 | struct ieee80211_rx_status *rx_status) | |
1863 | { | |
1864 | struct ieee80211_mgmt *mgmt; | |
1865 | u16 fc; | |
1866 | ||
1867 | if (skb->len < 24) { | |
1868 | dev_kfree_skb(skb); | |
1869 | return; | |
1870 | } | |
1871 | ||
1872 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1873 | fc = le16_to_cpu(mgmt->frame_control); | |
1874 | ||
1875 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { | |
1876 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
1877 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
1878 | skb->len, rx_status); | |
1879 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { | |
1880 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
1881 | rx_status); | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | dev_kfree_skb(skb); | |
1886 | } | |
1887 | ||
1888 | ||
1889 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
1890 | { | |
1891 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1892 | int active = 0; | |
1893 | struct sta_info *sta; | |
1894 | ||
1895 | spin_lock_bh(&local->sta_lock); | |
1896 | list_for_each_entry(sta, &local->sta_list, list) { | |
1897 | if (sta->dev == dev && | |
1898 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
1899 | jiffies)) { | |
1900 | active++; | |
1901 | break; | |
1902 | } | |
1903 | } | |
1904 | spin_unlock_bh(&local->sta_lock); | |
1905 | ||
1906 | return active; | |
1907 | } | |
1908 | ||
1909 | ||
1910 | static void ieee80211_sta_expire(struct net_device *dev) | |
1911 | { | |
1912 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1913 | struct sta_info *sta, *tmp; | |
1914 | ||
1915 | spin_lock_bh(&local->sta_lock); | |
1916 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) | |
1917 | if (time_after(jiffies, sta->last_rx + | |
1918 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
1919 | printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT | |
1920 | "\n", dev->name, MAC_ARG(sta->addr)); | |
1921 | sta_info_free(sta, 1); | |
1922 | } | |
1923 | spin_unlock_bh(&local->sta_lock); | |
1924 | } | |
1925 | ||
1926 | ||
1927 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
1928 | struct ieee80211_if_sta *ifsta) | |
1929 | { | |
1930 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1931 | ||
1932 | ieee80211_sta_expire(dev); | |
1933 | if (ieee80211_sta_active_ibss(dev)) | |
1934 | return; | |
1935 | ||
1936 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
1937 | "IBSS networks with same SSID (merge)\n", dev->name); | |
1938 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
1939 | } | |
1940 | ||
1941 | ||
1942 | void ieee80211_sta_timer(unsigned long data) | |
1943 | { | |
1944 | struct ieee80211_sub_if_data *sdata = | |
1945 | (struct ieee80211_sub_if_data *) data; | |
1946 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1947 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
1948 | ||
1949 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1950 | queue_work(local->hw.workqueue, &ifsta->work); | |
1951 | } | |
1952 | ||
1953 | ||
1954 | void ieee80211_sta_work(struct work_struct *work) | |
1955 | { | |
1956 | struct ieee80211_sub_if_data *sdata = | |
1957 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
1958 | struct net_device *dev = sdata->dev; | |
1959 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1960 | struct ieee80211_if_sta *ifsta; | |
1961 | struct sk_buff *skb; | |
1962 | ||
1963 | if (!netif_running(dev)) | |
1964 | return; | |
1965 | ||
1966 | if (local->sta_scanning) | |
1967 | return; | |
1968 | ||
1969 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
1970 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
1971 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " | |
1972 | "(type=%d)\n", dev->name, sdata->type); | |
1973 | return; | |
1974 | } | |
1975 | ifsta = &sdata->u.sta; | |
1976 | ||
1977 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
1978 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
1979 | ||
1980 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
1981 | ifsta->state != IEEE80211_ASSOCIATE && | |
1982 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
1983 | ieee80211_sta_start_scan(dev, NULL, 0); | |
1984 | return; | |
1985 | } | |
1986 | ||
1987 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
1988 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
1989 | return; | |
1990 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1991 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
1992 | return; | |
1993 | ||
1994 | switch (ifsta->state) { | |
1995 | case IEEE80211_DISABLED: | |
1996 | break; | |
1997 | case IEEE80211_AUTHENTICATE: | |
1998 | ieee80211_authenticate(dev, ifsta); | |
1999 | break; | |
2000 | case IEEE80211_ASSOCIATE: | |
2001 | ieee80211_associate(dev, ifsta); | |
2002 | break; | |
2003 | case IEEE80211_ASSOCIATED: | |
2004 | ieee80211_associated(dev, ifsta); | |
2005 | break; | |
2006 | case IEEE80211_IBSS_SEARCH: | |
2007 | ieee80211_sta_find_ibss(dev, ifsta); | |
2008 | break; | |
2009 | case IEEE80211_IBSS_JOINED: | |
2010 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2011 | break; | |
2012 | default: | |
2013 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2014 | ifsta->state); | |
2015 | break; | |
2016 | } | |
2017 | ||
2018 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2019 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2020 | "mixed-cell disabled - disassociate\n", dev->name); | |
2021 | ||
2022 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2023 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | ||
2028 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2029 | struct ieee80211_if_sta *ifsta) | |
2030 | { | |
2031 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2032 | ||
2033 | if (local->ops->reset_tsf) { | |
2034 | /* Reset own TSF to allow time synchronization work. */ | |
2035 | local->ops->reset_tsf(local_to_hw(local)); | |
2036 | } | |
2037 | ||
2038 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2039 | ||
2040 | ||
2041 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2042 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2043 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2044 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2045 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2046 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2047 | else | |
2048 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2049 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2050 | ifsta->auth_alg); | |
2051 | ifsta->auth_transaction = -1; | |
2052 | ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0; | |
2053 | netif_carrier_off(dev); | |
2054 | } | |
2055 | ||
2056 | ||
2057 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2058 | struct ieee80211_if_sta *ifsta) | |
2059 | { | |
2060 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2061 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2062 | ||
2063 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2064 | return; | |
2065 | ||
2066 | if ((ifsta->bssid_set || ifsta->auto_bssid_sel) && | |
2067 | (ifsta->ssid_set || ifsta->auto_ssid_sel)) { | |
2068 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2069 | queue_work(local->hw.workqueue, &ifsta->work); | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2074 | const char *ssid, int ssid_len) | |
2075 | { | |
2076 | int tmp, hidden_ssid; | |
2077 | ||
2078 | if (!memcmp(ifsta->ssid, ssid, ssid_len)) | |
2079 | return 1; | |
2080 | ||
2081 | if (ifsta->auto_bssid_sel) | |
2082 | return 0; | |
2083 | ||
2084 | hidden_ssid = 1; | |
2085 | tmp = ssid_len; | |
2086 | while (tmp--) { | |
2087 | if (ssid[tmp] != '\0') { | |
2088 | hidden_ssid = 0; | |
2089 | break; | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2094 | return 1; | |
2095 | ||
2096 | if (ssid_len == 1 && ssid[0] == ' ') | |
2097 | return 1; | |
2098 | ||
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2103 | struct ieee80211_if_sta *ifsta) | |
2104 | { | |
2105 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2106 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2107 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2108 | int top_rssi = 0, freq; | |
2109 | ||
2110 | rtnl_lock(); | |
2111 | ||
2112 | if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel && | |
2113 | !ifsta->auto_ssid_sel) { | |
2114 | ifsta->state = IEEE80211_AUTHENTICATE; | |
2115 | rtnl_unlock(); | |
2116 | ieee80211_sta_reset_auth(dev, ifsta); | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | spin_lock_bh(&local->sta_bss_lock); | |
2121 | freq = local->oper_channel->freq; | |
2122 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2123 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2124 | continue; | |
2125 | ||
2126 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2127 | !!sdata->default_key) | |
2128 | continue; | |
2129 | ||
2130 | if (!ifsta->auto_channel_sel && bss->freq != freq) | |
2131 | continue; | |
2132 | ||
2133 | if (!ifsta->auto_bssid_sel && | |
2134 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2135 | continue; | |
2136 | ||
2137 | if (!ifsta->auto_ssid_sel && | |
2138 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2139 | continue; | |
2140 | ||
2141 | if (!selected || top_rssi < bss->rssi) { | |
2142 | selected = bss; | |
2143 | top_rssi = bss->rssi; | |
2144 | } | |
2145 | } | |
2146 | if (selected) | |
2147 | atomic_inc(&selected->users); | |
2148 | spin_unlock_bh(&local->sta_bss_lock); | |
2149 | ||
2150 | if (selected) { | |
2151 | ieee80211_set_channel(local, -1, selected->freq); | |
2152 | if (!ifsta->ssid_set) | |
2153 | ieee80211_sta_set_ssid(dev, selected->ssid, | |
2154 | selected->ssid_len); | |
2155 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2156 | ieee80211_rx_bss_put(dev, selected); | |
2157 | ifsta->state = IEEE80211_AUTHENTICATE; | |
2158 | rtnl_unlock(); | |
2159 | ieee80211_sta_reset_auth(dev, ifsta); | |
2160 | return 0; | |
2161 | } else { | |
2162 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
2163 | ieee80211_sta_start_scan(dev, NULL, 0); | |
2164 | ifsta->state = IEEE80211_AUTHENTICATE; | |
2165 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2166 | } else | |
2167 | ifsta->state = IEEE80211_DISABLED; | |
2168 | } | |
2169 | rtnl_unlock(); | |
2170 | return -1; | |
2171 | } | |
2172 | ||
2173 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2174 | struct ieee80211_if_sta *ifsta, | |
2175 | struct ieee80211_sta_bss *bss) | |
2176 | { | |
2177 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2178 | int res, rates, i, j; | |
2179 | struct sk_buff *skb; | |
2180 | struct ieee80211_mgmt *mgmt; | |
2181 | struct ieee80211_tx_control control; | |
2182 | struct ieee80211_rate *rate; | |
2183 | struct ieee80211_hw_mode *mode; | |
2184 | struct rate_control_extra extra; | |
2185 | u8 *pos; | |
2186 | struct ieee80211_sub_if_data *sdata; | |
2187 | ||
2188 | /* Remove possible STA entries from other IBSS networks. */ | |
2189 | sta_info_flush(local, NULL); | |
2190 | ||
2191 | if (local->ops->reset_tsf) { | |
2192 | /* Reset own TSF to allow time synchronization work. */ | |
2193 | local->ops->reset_tsf(local_to_hw(local)); | |
2194 | } | |
2195 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2196 | res = ieee80211_if_config(dev); | |
2197 | if (res) | |
2198 | return res; | |
2199 | ||
2200 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2201 | ||
2202 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2203 | sdata->drop_unencrypted = bss->capability & | |
2204 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2205 | ||
2206 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2207 | ||
2208 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2209 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2210 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2211 | local->hw.conf.freq); | |
2212 | return -1; | |
2213 | } | |
2214 | ||
2215 | /* Set beacon template based on scan results */ | |
2216 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2217 | do { | |
2218 | if (!skb) | |
2219 | break; | |
2220 | ||
2221 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2222 | ||
2223 | mgmt = (struct ieee80211_mgmt *) | |
2224 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2225 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2226 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2227 | IEEE80211_STYPE_BEACON); | |
2228 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2229 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2230 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2231 | mgmt->u.beacon.beacon_int = | |
2232 | cpu_to_le16(local->hw.conf.beacon_int); | |
2233 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2234 | ||
2235 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2236 | *pos++ = WLAN_EID_SSID; | |
2237 | *pos++ = ifsta->ssid_len; | |
2238 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2239 | ||
2240 | rates = bss->supp_rates_len; | |
2241 | if (rates > 8) | |
2242 | rates = 8; | |
2243 | pos = skb_put(skb, 2 + rates); | |
2244 | *pos++ = WLAN_EID_SUPP_RATES; | |
2245 | *pos++ = rates; | |
2246 | memcpy(pos, bss->supp_rates, rates); | |
2247 | ||
2248 | pos = skb_put(skb, 2 + 1); | |
2249 | *pos++ = WLAN_EID_DS_PARAMS; | |
2250 | *pos++ = 1; | |
2251 | *pos++ = bss->channel; | |
2252 | ||
2253 | pos = skb_put(skb, 2 + 2); | |
2254 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2255 | *pos++ = 2; | |
2256 | /* FIX: set ATIM window based on scan results */ | |
2257 | *pos++ = 0; | |
2258 | *pos++ = 0; | |
2259 | ||
2260 | if (bss->supp_rates_len > 8) { | |
2261 | rates = bss->supp_rates_len - 8; | |
2262 | pos = skb_put(skb, 2 + rates); | |
2263 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2264 | *pos++ = rates; | |
2265 | memcpy(pos, &bss->supp_rates[8], rates); | |
2266 | } | |
2267 | ||
2268 | memset(&control, 0, sizeof(control)); | |
2269 | memset(&extra, 0, sizeof(extra)); | |
2270 | extra.mode = local->oper_hw_mode; | |
2271 | rate = rate_control_get_rate(local, dev, skb, &extra); | |
2272 | if (!rate) { | |
2273 | printk(KERN_DEBUG "%s: Failed to determine TX rate " | |
2274 | "for IBSS beacon\n", dev->name); | |
2275 | break; | |
2276 | } | |
2277 | control.tx_rate = (local->short_preamble && | |
2278 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
2279 | rate->val2 : rate->val; | |
2280 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2281 | control.power_level = local->hw.conf.power_level; | |
2282 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2283 | control.retry_limit = 1; | |
2284 | ||
2285 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2286 | if (ifsta->probe_resp) { | |
2287 | mgmt = (struct ieee80211_mgmt *) | |
2288 | ifsta->probe_resp->data; | |
2289 | mgmt->frame_control = | |
2290 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2291 | IEEE80211_STYPE_PROBE_RESP); | |
2292 | } else { | |
2293 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2294 | "template for IBSS\n", dev->name); | |
2295 | } | |
2296 | ||
2297 | if (local->ops->beacon_update && | |
2298 | local->ops->beacon_update(local_to_hw(local), | |
2299 | skb, &control) == 0) { | |
2300 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2301 | "template based on scan results\n", dev->name); | |
2302 | skb = NULL; | |
2303 | } | |
2304 | ||
2305 | rates = 0; | |
2306 | mode = local->oper_hw_mode; | |
2307 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2308 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2309 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2310 | bitrate *= 2; | |
2311 | for (j = 0; j < mode->num_rates; j++) | |
2312 | if (mode->rates[j].rate == bitrate) | |
2313 | rates |= BIT(j); | |
2314 | } | |
2315 | ifsta->supp_rates_bits = rates; | |
2316 | } while (0); | |
2317 | ||
2318 | if (skb) { | |
2319 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2320 | "template\n", dev->name); | |
2321 | dev_kfree_skb(skb); | |
2322 | } | |
2323 | ||
2324 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2325 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2326 | ||
2327 | ieee80211_rx_bss_put(dev, bss); | |
2328 | ||
2329 | return res; | |
2330 | } | |
2331 | ||
2332 | ||
2333 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2334 | struct ieee80211_if_sta *ifsta) | |
2335 | { | |
2336 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2337 | struct ieee80211_sta_bss *bss; | |
2338 | struct ieee80211_sub_if_data *sdata; | |
2339 | struct ieee80211_hw_mode *mode; | |
2340 | u8 bssid[ETH_ALEN], *pos; | |
2341 | int i; | |
2342 | ||
2343 | #if 0 | |
2344 | /* Easier testing, use fixed BSSID. */ | |
2345 | memset(bssid, 0xfe, ETH_ALEN); | |
2346 | #else | |
2347 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2348 | * own MAC address to make sure that devices that do not have proper | |
2349 | * random number generator get different BSSID. */ | |
2350 | get_random_bytes(bssid, ETH_ALEN); | |
2351 | for (i = 0; i < ETH_ALEN; i++) | |
2352 | bssid[i] ^= dev->dev_addr[i]; | |
2353 | bssid[0] &= ~0x01; | |
2354 | bssid[0] |= 0x02; | |
2355 | #endif | |
2356 | ||
2357 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n", | |
2358 | dev->name, MAC_ARG(bssid)); | |
2359 | ||
2360 | bss = ieee80211_rx_bss_add(dev, bssid); | |
2361 | if (!bss) | |
2362 | return -ENOMEM; | |
2363 | ||
2364 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2365 | mode = local->oper_hw_mode; | |
2366 | ||
2367 | if (local->hw.conf.beacon_int == 0) | |
2368 | local->hw.conf.beacon_int = 100; | |
2369 | bss->beacon_int = local->hw.conf.beacon_int; | |
2370 | bss->hw_mode = local->hw.conf.phymode; | |
2371 | bss->channel = local->hw.conf.channel; | |
2372 | bss->freq = local->hw.conf.freq; | |
2373 | bss->last_update = jiffies; | |
2374 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2375 | if (sdata->default_key) { | |
2376 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2377 | } else | |
2378 | sdata->drop_unencrypted = 0; | |
2379 | bss->supp_rates_len = mode->num_rates; | |
2380 | pos = bss->supp_rates; | |
2381 | for (i = 0; i < mode->num_rates; i++) { | |
2382 | int rate = mode->rates[i].rate; | |
2383 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2384 | rate /= 2; | |
2385 | *pos++ = (u8) (rate / 5); | |
2386 | } | |
2387 | ||
2388 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2389 | } | |
2390 | ||
2391 | ||
2392 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2393 | struct ieee80211_if_sta *ifsta) | |
2394 | { | |
2395 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2396 | struct ieee80211_sta_bss *bss; | |
2397 | int found = 0; | |
2398 | u8 bssid[ETH_ALEN]; | |
2399 | int active_ibss; | |
2400 | ||
2401 | if (ifsta->ssid_len == 0) | |
2402 | return -EINVAL; | |
2403 | ||
2404 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2405 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2406 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2407 | dev->name, active_ibss); | |
2408 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2409 | spin_lock_bh(&local->sta_bss_lock); | |
2410 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2411 | if (ifsta->ssid_len != bss->ssid_len || | |
2412 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2413 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2414 | continue; | |
2415 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2416 | printk(KERN_DEBUG " bssid=" MAC_FMT " found\n", | |
2417 | MAC_ARG(bss->bssid)); | |
2418 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2419 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2420 | found = 1; | |
2421 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2422 | break; | |
2423 | } | |
2424 | spin_unlock_bh(&local->sta_bss_lock); | |
2425 | ||
2426 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2427 | printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current " | |
2428 | MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid)); | |
2429 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2430 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
2431 | (bss = ieee80211_rx_bss_get(dev, bssid))) { | |
2432 | printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT | |
2433 | " based on configured SSID\n", | |
2434 | dev->name, MAC_ARG(bssid)); | |
2435 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2436 | } | |
2437 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2438 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2439 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2440 | ||
2441 | /* Selected IBSS not found in current scan results - try to scan */ | |
2442 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2443 | !ieee80211_sta_active_ibss(dev)) { | |
2444 | mod_timer(&ifsta->timer, jiffies + | |
2445 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2446 | } else if (time_after(jiffies, local->last_scan_completed + | |
2447 | IEEE80211_SCAN_INTERVAL)) { | |
2448 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2449 | "join\n", dev->name); | |
2450 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2451 | ifsta->ssid_len); | |
2452 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2453 | int interval = IEEE80211_SCAN_INTERVAL; | |
2454 | ||
2455 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2456 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
2457 | if (ifsta->create_ibss && | |
2458 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) | |
2459 | return ieee80211_sta_create_ibss(dev, ifsta); | |
2460 | if (ifsta->create_ibss) { | |
2461 | printk(KERN_DEBUG "%s: IBSS not allowed on the" | |
2462 | " configured channel %d (%d MHz)\n", | |
2463 | dev->name, local->hw.conf.channel, | |
2464 | local->hw.conf.freq); | |
2465 | } | |
2466 | ||
2467 | /* No IBSS found - decrease scan interval and continue | |
2468 | * scanning. */ | |
2469 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2470 | } | |
2471 | ||
2472 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2473 | mod_timer(&ifsta->timer, jiffies + interval); | |
2474 | return 0; | |
2475 | } | |
2476 | ||
2477 | return 0; | |
2478 | } | |
2479 | ||
2480 | ||
2481 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2482 | { | |
2483 | struct ieee80211_sub_if_data *sdata; | |
2484 | struct ieee80211_if_sta *ifsta; | |
2485 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2486 | ||
2487 | if (len > IEEE80211_MAX_SSID_LEN) | |
2488 | return -EINVAL; | |
2489 | ||
2490 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
2491 | * not defined. */ | |
2492 | if (local->ops->conf_tx) { | |
2493 | struct ieee80211_tx_queue_params qparam; | |
2494 | int i; | |
2495 | ||
2496 | memset(&qparam, 0, sizeof(qparam)); | |
2497 | /* TODO: are these ok defaults for all hw_modes? */ | |
2498 | qparam.aifs = 2; | |
2499 | qparam.cw_min = | |
2500 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
2501 | qparam.cw_max = 1023; | |
2502 | qparam.burst_time = 0; | |
2503 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
2504 | { | |
2505 | local->ops->conf_tx(local_to_hw(local), | |
2506 | i + IEEE80211_TX_QUEUE_DATA0, | |
2507 | &qparam); | |
2508 | } | |
2509 | /* IBSS uses different parameters for Beacon sending */ | |
2510 | qparam.cw_min++; | |
2511 | qparam.cw_min *= 2; | |
2512 | qparam.cw_min--; | |
2513 | local->ops->conf_tx(local_to_hw(local), | |
2514 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
2515 | } | |
2516 | ||
2517 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2518 | ifsta = &sdata->u.sta; | |
2519 | ||
2520 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
2521 | ifsta->prev_bssid_set = 0; | |
2522 | memcpy(ifsta->ssid, ssid, len); | |
2523 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
2524 | ifsta->ssid_len = len; | |
2525 | ||
2526 | ifsta->ssid_set = len ? 1 : 0; | |
2527 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) { | |
2528 | ifsta->ibss_join_req = jiffies; | |
2529 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2530 | return ieee80211_sta_find_ibss(dev, ifsta); | |
2531 | } | |
2532 | return 0; | |
2533 | } | |
2534 | ||
2535 | ||
2536 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
2537 | { | |
2538 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2539 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2540 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2541 | *len = ifsta->ssid_len; | |
2542 | return 0; | |
2543 | } | |
2544 | ||
2545 | ||
2546 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
2547 | { | |
2548 | struct ieee80211_sub_if_data *sdata; | |
2549 | struct ieee80211_if_sta *ifsta; | |
2550 | int res; | |
2551 | ||
2552 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2553 | ifsta = &sdata->u.sta; | |
2554 | ||
2555 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2556 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2557 | res = ieee80211_if_config(dev); | |
2558 | if (res) { | |
2559 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2560 | "the low-level driver\n", dev->name); | |
2561 | return res; | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | if (!is_valid_ether_addr(bssid)) | |
2566 | ifsta->bssid_set = 0; | |
2567 | else | |
2568 | ifsta->bssid_set = 1; | |
2569 | return 0; | |
2570 | } | |
2571 | ||
2572 | ||
2573 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2574 | struct ieee80211_sub_if_data *sdata, | |
2575 | int powersave) | |
2576 | { | |
2577 | struct sk_buff *skb; | |
2578 | struct ieee80211_hdr *nullfunc; | |
2579 | u16 fc; | |
2580 | ||
2581 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2582 | if (!skb) { | |
2583 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2584 | "frame\n", sdata->dev->name); | |
2585 | return; | |
2586 | } | |
2587 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2588 | ||
2589 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2590 | memset(nullfunc, 0, 24); | |
2591 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2592 | IEEE80211_FCTL_TODS; | |
2593 | if (powersave) | |
2594 | fc |= IEEE80211_FCTL_PM; | |
2595 | nullfunc->frame_control = cpu_to_le16(fc); | |
2596 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
2597 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2598 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
2599 | ||
2600 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
2601 | } | |
2602 | ||
2603 | ||
2604 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
2605 | { | |
2606 | struct ieee80211_local *local = hw_to_local(hw); | |
2607 | struct net_device *dev = local->scan_dev; | |
2608 | struct ieee80211_sub_if_data *sdata; | |
2609 | union iwreq_data wrqu; | |
2610 | ||
2611 | local->last_scan_completed = jiffies; | |
2612 | wmb(); | |
2613 | local->sta_scanning = 0; | |
2614 | ||
2615 | if (ieee80211_hw_config(local)) | |
2616 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2617 | "channel after scan\n", dev->name); | |
2618 | ||
2619 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2620 | ieee80211_if_config(dev)) | |
2621 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2622 | "BSSID after scan\n", dev->name); | |
2623 | ||
2624 | memset(&wrqu, 0, sizeof(wrqu)); | |
2625 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
2626 | ||
2627 | read_lock(&local->sub_if_lock); | |
2628 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2629 | |
2630 | /* No need to wake the master device. */ | |
2631 | if (sdata->dev == local->mdev) | |
2632 | continue; | |
2633 | ||
f0706e82 JB |
2634 | if (sdata->type == IEEE80211_IF_TYPE_STA) { |
2635 | if (sdata->u.sta.associated) | |
2636 | ieee80211_send_nullfunc(local, sdata, 0); | |
2637 | ieee80211_sta_timer((unsigned long)sdata); | |
2638 | } | |
14042cbe | 2639 | |
f0706e82 JB |
2640 | netif_wake_queue(sdata->dev); |
2641 | } | |
2642 | read_unlock(&local->sub_if_lock); | |
2643 | ||
2644 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2645 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2646 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2647 | if (!ifsta->bssid_set || | |
2648 | (!ifsta->state == IEEE80211_IBSS_JOINED && | |
2649 | !ieee80211_sta_active_ibss(dev))) | |
2650 | ieee80211_sta_find_ibss(dev, ifsta); | |
2651 | } | |
2652 | } | |
2653 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
2654 | ||
2655 | void ieee80211_sta_scan_work(struct work_struct *work) | |
2656 | { | |
2657 | struct ieee80211_local *local = | |
2658 | container_of(work, struct ieee80211_local, scan_work.work); | |
2659 | struct net_device *dev = local->scan_dev; | |
2660 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2661 | struct ieee80211_hw_mode *mode; | |
2662 | struct ieee80211_channel *chan; | |
2663 | int skip; | |
2664 | unsigned long next_delay = 0; | |
2665 | ||
2666 | if (!local->sta_scanning) | |
2667 | return; | |
2668 | ||
2669 | switch (local->scan_state) { | |
2670 | case SCAN_SET_CHANNEL: | |
2671 | mode = local->scan_hw_mode; | |
2672 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
2673 | local->scan_channel_idx >= mode->num_channels) { | |
2674 | ieee80211_scan_completed(local_to_hw(local)); | |
2675 | return; | |
2676 | } | |
2677 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
2678 | chan = &mode->channels[local->scan_channel_idx]; | |
2679 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
2680 | (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
2681 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || | |
2682 | (local->hw_modes & local->enabled_modes & | |
2683 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
2684 | skip = 1; | |
2685 | ||
2686 | if (!skip) { | |
2687 | #if 0 | |
2688 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
2689 | dev->name, chan->chan, chan->freq); | |
2690 | #endif | |
2691 | ||
2692 | local->scan_channel = chan; | |
2693 | if (ieee80211_hw_config(local)) { | |
2694 | printk(KERN_DEBUG "%s: failed to set channel " | |
2695 | "%d (%d MHz) for scan\n", dev->name, | |
2696 | chan->chan, chan->freq); | |
2697 | skip = 1; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | local->scan_channel_idx++; | |
2702 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
2703 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
2704 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
2705 | struct ieee80211_hw_mode, | |
2706 | list); | |
2707 | local->scan_channel_idx = 0; | |
2708 | } | |
2709 | } | |
2710 | ||
2711 | if (skip) | |
2712 | break; | |
2713 | ||
2714 | next_delay = IEEE80211_PROBE_DELAY + | |
2715 | usecs_to_jiffies(local->hw.channel_change_time); | |
2716 | local->scan_state = SCAN_SEND_PROBE; | |
2717 | break; | |
2718 | case SCAN_SEND_PROBE: | |
2719 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
2720 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
2721 | local->scan_ssid_len); | |
2722 | next_delay = IEEE80211_CHANNEL_TIME; | |
2723 | } else | |
2724 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
2725 | local->scan_state = SCAN_SET_CHANNEL; | |
2726 | break; | |
2727 | } | |
2728 | ||
2729 | if (local->sta_scanning) | |
2730 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2731 | next_delay); | |
2732 | } | |
2733 | ||
2734 | ||
2735 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
2736 | u8 *ssid, size_t ssid_len) | |
2737 | { | |
2738 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2739 | struct ieee80211_sub_if_data *sdata; | |
2740 | ||
2741 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
2742 | return -EINVAL; | |
2743 | ||
2744 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
2745 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
2746 | * BSSID: MACAddress | |
2747 | * SSID | |
2748 | * ScanType: ACTIVE, PASSIVE | |
2749 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
2750 | * a Probe frame during active scanning | |
2751 | * ChannelList | |
2752 | * MinChannelTime (>= ProbeDelay), in TU | |
2753 | * MaxChannelTime: (>= MinChannelTime), in TU | |
2754 | */ | |
2755 | ||
2756 | /* MLME-SCAN.confirm | |
2757 | * BSSDescriptionSet | |
2758 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
2759 | */ | |
2760 | ||
2761 | if (local->sta_scanning) { | |
2762 | if (local->scan_dev == dev) | |
2763 | return 0; | |
2764 | return -EBUSY; | |
2765 | } | |
2766 | ||
2767 | if (local->ops->hw_scan) { | |
2768 | int rc = local->ops->hw_scan(local_to_hw(local), | |
2769 | ssid, ssid_len); | |
2770 | if (!rc) { | |
2771 | local->sta_scanning = 1; | |
2772 | local->scan_dev = dev; | |
2773 | } | |
2774 | return rc; | |
2775 | } | |
2776 | ||
2777 | local->sta_scanning = 1; | |
2778 | ||
2779 | read_lock(&local->sub_if_lock); | |
2780 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2781 | |
2782 | /* Don't stop the master interface, otherwise we can't transmit | |
2783 | * probes! */ | |
2784 | if (sdata->dev == local->mdev) | |
2785 | continue; | |
2786 | ||
f0706e82 JB |
2787 | netif_stop_queue(sdata->dev); |
2788 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2789 | sdata->u.sta.associated) | |
2790 | ieee80211_send_nullfunc(local, sdata, 1); | |
2791 | } | |
2792 | read_unlock(&local->sub_if_lock); | |
2793 | ||
2794 | if (ssid) { | |
2795 | local->scan_ssid_len = ssid_len; | |
2796 | memcpy(local->scan_ssid, ssid, ssid_len); | |
2797 | } else | |
2798 | local->scan_ssid_len = 0; | |
2799 | local->scan_state = SCAN_SET_CHANNEL; | |
2800 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
2801 | struct ieee80211_hw_mode, | |
2802 | list); | |
2803 | local->scan_channel_idx = 0; | |
2804 | local->scan_dev = dev; | |
2805 | ||
2806 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2807 | ieee80211_if_config(dev)) | |
2808 | printk(KERN_DEBUG "%s: failed to set BSSID for scan\n", | |
2809 | dev->name); | |
2810 | ||
2811 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
2812 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2813 | IEEE80211_CHANNEL_TIME); | |
2814 | ||
2815 | return 0; | |
2816 | } | |
2817 | ||
2818 | ||
2819 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
2820 | { | |
2821 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2822 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2823 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2824 | ||
2825 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2826 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); | |
2827 | ||
2828 | if (local->sta_scanning) { | |
2829 | if (local->scan_dev == dev) | |
2830 | return 0; | |
2831 | return -EBUSY; | |
2832 | } | |
2833 | ||
2834 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); | |
2835 | queue_work(local->hw.workqueue, &ifsta->work); | |
2836 | return 0; | |
2837 | } | |
2838 | ||
2839 | static char * | |
2840 | ieee80211_sta_scan_result(struct net_device *dev, | |
2841 | struct ieee80211_sta_bss *bss, | |
2842 | char *current_ev, char *end_buf) | |
2843 | { | |
2844 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2845 | struct iw_event iwe; | |
2846 | ||
2847 | if (time_after(jiffies, | |
2848 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2849 | return current_ev; | |
2850 | ||
2851 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
2852 | return current_ev; | |
2853 | ||
2854 | if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY && | |
2855 | !bss->wpa_ie && !bss->rsn_ie) | |
2856 | return current_ev; | |
2857 | ||
2858 | if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID && | |
2859 | (local->scan_ssid_len != bss->ssid_len || | |
2860 | memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0)) | |
2861 | return current_ev; | |
2862 | ||
2863 | memset(&iwe, 0, sizeof(iwe)); | |
2864 | iwe.cmd = SIOCGIWAP; | |
2865 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
2866 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
2867 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2868 | IW_EV_ADDR_LEN); | |
2869 | ||
2870 | memset(&iwe, 0, sizeof(iwe)); | |
2871 | iwe.cmd = SIOCGIWESSID; | |
2872 | iwe.u.data.length = bss->ssid_len; | |
2873 | iwe.u.data.flags = 1; | |
2874 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2875 | bss->ssid); | |
2876 | ||
2877 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
2878 | memset(&iwe, 0, sizeof(iwe)); | |
2879 | iwe.cmd = SIOCGIWMODE; | |
2880 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
2881 | iwe.u.mode = IW_MODE_MASTER; | |
2882 | else | |
2883 | iwe.u.mode = IW_MODE_ADHOC; | |
2884 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2885 | IW_EV_UINT_LEN); | |
2886 | } | |
2887 | ||
2888 | memset(&iwe, 0, sizeof(iwe)); | |
2889 | iwe.cmd = SIOCGIWFREQ; | |
2890 | iwe.u.freq.m = bss->channel; | |
2891 | iwe.u.freq.e = 0; | |
2892 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2893 | IW_EV_FREQ_LEN); | |
2894 | iwe.u.freq.m = bss->freq * 100000; | |
2895 | iwe.u.freq.e = 1; | |
2896 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2897 | IW_EV_FREQ_LEN); | |
2898 | ||
2899 | memset(&iwe, 0, sizeof(iwe)); | |
2900 | iwe.cmd = IWEVQUAL; | |
2901 | iwe.u.qual.qual = bss->signal; | |
2902 | iwe.u.qual.level = bss->rssi; | |
2903 | iwe.u.qual.noise = bss->noise; | |
2904 | iwe.u.qual.updated = local->wstats_flags; | |
2905 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2906 | IW_EV_QUAL_LEN); | |
2907 | ||
2908 | memset(&iwe, 0, sizeof(iwe)); | |
2909 | iwe.cmd = SIOCGIWENCODE; | |
2910 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
2911 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
2912 | else | |
2913 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
2914 | iwe.u.data.length = 0; | |
2915 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
2916 | ||
2917 | if (bss && bss->wpa_ie) { | |
2918 | memset(&iwe, 0, sizeof(iwe)); | |
2919 | iwe.cmd = IWEVGENIE; | |
2920 | iwe.u.data.length = bss->wpa_ie_len; | |
2921 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2922 | bss->wpa_ie); | |
2923 | } | |
2924 | ||
2925 | if (bss && bss->rsn_ie) { | |
2926 | memset(&iwe, 0, sizeof(iwe)); | |
2927 | iwe.cmd = IWEVGENIE; | |
2928 | iwe.u.data.length = bss->rsn_ie_len; | |
2929 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2930 | bss->rsn_ie); | |
2931 | } | |
2932 | ||
2933 | if (bss && bss->supp_rates_len > 0) { | |
2934 | /* display all supported rates in readable format */ | |
2935 | char *p = current_ev + IW_EV_LCP_LEN; | |
2936 | int i; | |
2937 | ||
2938 | memset(&iwe, 0, sizeof(iwe)); | |
2939 | iwe.cmd = SIOCGIWRATE; | |
2940 | /* Those two flags are ignored... */ | |
2941 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
2942 | ||
2943 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2944 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
2945 | 0x7f) * 500000); | |
2946 | p = iwe_stream_add_value(current_ev, p, | |
2947 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
2948 | } | |
2949 | current_ev = p; | |
2950 | } | |
2951 | ||
2952 | if (bss) { | |
2953 | char *buf; | |
2954 | buf = kmalloc(30, GFP_ATOMIC); | |
2955 | if (buf) { | |
2956 | memset(&iwe, 0, sizeof(iwe)); | |
2957 | iwe.cmd = IWEVCUSTOM; | |
2958 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
2959 | iwe.u.data.length = strlen(buf); | |
2960 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
2961 | &iwe, buf); | |
2962 | kfree(buf); | |
2963 | } | |
2964 | } | |
2965 | ||
2966 | do { | |
2967 | char *buf; | |
2968 | ||
2969 | if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO)) | |
2970 | break; | |
2971 | ||
2972 | buf = kmalloc(100, GFP_ATOMIC); | |
2973 | if (!buf) | |
2974 | break; | |
2975 | ||
2976 | memset(&iwe, 0, sizeof(iwe)); | |
2977 | iwe.cmd = IWEVCUSTOM; | |
2978 | sprintf(buf, "bcn_int=%d", bss->beacon_int); | |
2979 | iwe.u.data.length = strlen(buf); | |
2980 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2981 | buf); | |
2982 | ||
2983 | memset(&iwe, 0, sizeof(iwe)); | |
2984 | iwe.cmd = IWEVCUSTOM; | |
2985 | sprintf(buf, "capab=0x%04x", bss->capability); | |
2986 | iwe.u.data.length = strlen(buf); | |
2987 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2988 | buf); | |
2989 | ||
2990 | kfree(buf); | |
2991 | break; | |
2992 | } while (0); | |
2993 | ||
2994 | return current_ev; | |
2995 | } | |
2996 | ||
2997 | ||
2998 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
2999 | { | |
3000 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3001 | char *current_ev = buf; | |
3002 | char *end_buf = buf + len; | |
3003 | struct ieee80211_sta_bss *bss; | |
3004 | ||
3005 | spin_lock_bh(&local->sta_bss_lock); | |
3006 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3007 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3008 | spin_unlock_bh(&local->sta_bss_lock); | |
3009 | return -E2BIG; | |
3010 | } | |
3011 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3012 | end_buf); | |
3013 | } | |
3014 | spin_unlock_bh(&local->sta_bss_lock); | |
3015 | return current_ev - buf; | |
3016 | } | |
3017 | ||
3018 | ||
3019 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3020 | { | |
3021 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3022 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3023 | kfree(ifsta->extra_ie); | |
3024 | if (len == 0) { | |
3025 | ifsta->extra_ie = NULL; | |
3026 | ifsta->extra_ie_len = 0; | |
3027 | return 0; | |
3028 | } | |
3029 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3030 | if (!ifsta->extra_ie) { | |
3031 | ifsta->extra_ie_len = 0; | |
3032 | return -ENOMEM; | |
3033 | } | |
3034 | memcpy(ifsta->extra_ie, ie, len); | |
3035 | ifsta->extra_ie_len = len; | |
3036 | return 0; | |
3037 | } | |
3038 | ||
3039 | ||
3040 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3041 | struct sk_buff *skb, u8 *bssid, | |
3042 | u8 *addr) | |
3043 | { | |
3044 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3045 | struct sta_info *sta; | |
91fa558b | 3046 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
3047 | |
3048 | /* TODO: Could consider removing the least recently used entry and | |
3049 | * allow new one to be added. */ | |
3050 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3051 | if (net_ratelimit()) { | |
3052 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
3053 | "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr)); | |
3054 | } | |
3055 | return NULL; | |
3056 | } | |
3057 | ||
3058 | printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n", | |
3059 | local->mdev->name, MAC_ARG(addr), dev->name); | |
3060 | ||
3061 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3062 | if (!sta) | |
3063 | return NULL; | |
3064 | ||
3065 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3066 | ||
3067 | rate_control_rate_init(sta, local); | |
3068 | ||
3069 | return sta; /* caller will call sta_info_put() */ | |
3070 | } | |
3071 | ||
3072 | ||
3073 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3074 | { | |
3075 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3076 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3077 | ||
3078 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3079 | dev->name, reason); | |
3080 | ||
3081 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
3082 | sdata->type != IEEE80211_IF_TYPE_IBSS) | |
3083 | return -EINVAL; | |
3084 | ||
3085 | ieee80211_send_deauth(dev, ifsta, reason); | |
3086 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3087 | return 0; | |
3088 | } | |
3089 | ||
3090 | ||
3091 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3092 | { | |
3093 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3094 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3095 | ||
3096 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3097 | dev->name, reason); | |
3098 | ||
3099 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3100 | return -EINVAL; | |
3101 | ||
3102 | if (!ifsta->associated) | |
3103 | return -1; | |
3104 | ||
3105 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3106 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3107 | return 0; | |
3108 | } |