Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | /* TODO: | |
15 | * BSS table: use <BSSID,SSID> as the key to support multi-SSID APs | |
16 | * order BSS list by RSSI(?) ("quality of AP") | |
17 | * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE, | |
18 | * SSID) | |
19 | */ | |
5b323edb | 20 | #include <linux/delay.h> |
f0706e82 JB |
21 | #include <linux/if_ether.h> |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/netdevice.h> | |
24 | #include <linux/if_arp.h> | |
25 | #include <linux/wireless.h> | |
26 | #include <linux/random.h> | |
27 | #include <linux/etherdevice.h> | |
f0706e82 JB |
28 | #include <net/iw_handler.h> |
29 | #include <asm/types.h> | |
f0706e82 JB |
30 | |
31 | #include <net/mac80211.h> | |
32 | #include "ieee80211_i.h" | |
33 | #include "ieee80211_rate.h" | |
34 | #include "hostapd_ioctl.h" | |
35 | ||
36 | #define IEEE80211_AUTH_TIMEOUT (HZ / 5) | |
37 | #define IEEE80211_AUTH_MAX_TRIES 3 | |
38 | #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) | |
39 | #define IEEE80211_ASSOC_MAX_TRIES 3 | |
40 | #define IEEE80211_MONITORING_INTERVAL (2 * HZ) | |
41 | #define IEEE80211_PROBE_INTERVAL (60 * HZ) | |
42 | #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ) | |
43 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) | |
44 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) | |
45 | #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ) | |
46 | ||
47 | #define IEEE80211_PROBE_DELAY (HZ / 33) | |
48 | #define IEEE80211_CHANNEL_TIME (HZ / 33) | |
49 | #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) | |
50 | #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ) | |
51 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) | |
52 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) | |
53 | ||
54 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 | |
55 | ||
56 | ||
57 | #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype) | |
58 | ||
59 | #define ERP_INFO_USE_PROTECTION BIT(1) | |
60 | ||
61 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
62 | u8 *ssid, size_t ssid_len); | |
63 | static struct ieee80211_sta_bss * | |
64 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid); | |
65 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
66 | struct ieee80211_sta_bss *bss); | |
67 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
68 | struct ieee80211_if_sta *ifsta); | |
69 | static int ieee80211_sta_wep_configured(struct net_device *dev); | |
70 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
71 | u8 *ssid, size_t ssid_len); | |
72 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
73 | struct ieee80211_if_sta *ifsta); | |
74 | ||
75 | ||
76 | /* Parsed Information Elements */ | |
77 | struct ieee802_11_elems { | |
5558235c | 78 | /* pointers to IEs */ |
f0706e82 | 79 | u8 *ssid; |
f0706e82 | 80 | u8 *supp_rates; |
f0706e82 | 81 | u8 *fh_params; |
f0706e82 | 82 | u8 *ds_params; |
f0706e82 | 83 | u8 *cf_params; |
f0706e82 | 84 | u8 *tim; |
f0706e82 | 85 | u8 *ibss_params; |
f0706e82 | 86 | u8 *challenge; |
f0706e82 | 87 | u8 *wpa; |
f0706e82 | 88 | u8 *rsn; |
f0706e82 | 89 | u8 *erp_info; |
f0706e82 | 90 | u8 *ext_supp_rates; |
f0706e82 | 91 | u8 *wmm_info; |
f0706e82 | 92 | u8 *wmm_param; |
5558235c JB |
93 | |
94 | /* length of them, respectively */ | |
95 | u8 ssid_len; | |
96 | u8 supp_rates_len; | |
97 | u8 fh_params_len; | |
98 | u8 ds_params_len; | |
99 | u8 cf_params_len; | |
100 | u8 tim_len; | |
101 | u8 ibss_params_len; | |
102 | u8 challenge_len; | |
103 | u8 wpa_len; | |
104 | u8 rsn_len; | |
105 | u8 erp_info_len; | |
106 | u8 ext_supp_rates_len; | |
107 | u8 wmm_info_len; | |
f0706e82 JB |
108 | u8 wmm_param_len; |
109 | }; | |
110 | ||
111 | typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes; | |
112 | ||
113 | ||
114 | static ParseRes ieee802_11_parse_elems(u8 *start, size_t len, | |
115 | struct ieee802_11_elems *elems) | |
116 | { | |
117 | size_t left = len; | |
118 | u8 *pos = start; | |
119 | int unknown = 0; | |
120 | ||
121 | memset(elems, 0, sizeof(*elems)); | |
122 | ||
123 | while (left >= 2) { | |
124 | u8 id, elen; | |
125 | ||
126 | id = *pos++; | |
127 | elen = *pos++; | |
128 | left -= 2; | |
129 | ||
130 | if (elen > left) { | |
131 | #if 0 | |
132 | if (net_ratelimit()) | |
133 | printk(KERN_DEBUG "IEEE 802.11 element parse " | |
134 | "failed (id=%d elen=%d left=%d)\n", | |
135 | id, elen, left); | |
136 | #endif | |
137 | return ParseFailed; | |
138 | } | |
139 | ||
140 | switch (id) { | |
141 | case WLAN_EID_SSID: | |
142 | elems->ssid = pos; | |
143 | elems->ssid_len = elen; | |
144 | break; | |
145 | case WLAN_EID_SUPP_RATES: | |
146 | elems->supp_rates = pos; | |
147 | elems->supp_rates_len = elen; | |
148 | break; | |
149 | case WLAN_EID_FH_PARAMS: | |
150 | elems->fh_params = pos; | |
151 | elems->fh_params_len = elen; | |
152 | break; | |
153 | case WLAN_EID_DS_PARAMS: | |
154 | elems->ds_params = pos; | |
155 | elems->ds_params_len = elen; | |
156 | break; | |
157 | case WLAN_EID_CF_PARAMS: | |
158 | elems->cf_params = pos; | |
159 | elems->cf_params_len = elen; | |
160 | break; | |
161 | case WLAN_EID_TIM: | |
162 | elems->tim = pos; | |
163 | elems->tim_len = elen; | |
164 | break; | |
165 | case WLAN_EID_IBSS_PARAMS: | |
166 | elems->ibss_params = pos; | |
167 | elems->ibss_params_len = elen; | |
168 | break; | |
169 | case WLAN_EID_CHALLENGE: | |
170 | elems->challenge = pos; | |
171 | elems->challenge_len = elen; | |
172 | break; | |
173 | case WLAN_EID_WPA: | |
174 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
175 | pos[2] == 0xf2) { | |
176 | /* Microsoft OUI (00:50:F2) */ | |
177 | if (pos[3] == 1) { | |
178 | /* OUI Type 1 - WPA IE */ | |
179 | elems->wpa = pos; | |
180 | elems->wpa_len = elen; | |
181 | } else if (elen >= 5 && pos[3] == 2) { | |
182 | if (pos[4] == 0) { | |
183 | elems->wmm_info = pos; | |
184 | elems->wmm_info_len = elen; | |
185 | } else if (pos[4] == 1) { | |
186 | elems->wmm_param = pos; | |
187 | elems->wmm_param_len = elen; | |
188 | } | |
189 | } | |
190 | } | |
191 | break; | |
192 | case WLAN_EID_RSN: | |
193 | elems->rsn = pos; | |
194 | elems->rsn_len = elen; | |
195 | break; | |
196 | case WLAN_EID_ERP_INFO: | |
197 | elems->erp_info = pos; | |
198 | elems->erp_info_len = elen; | |
199 | break; | |
200 | case WLAN_EID_EXT_SUPP_RATES: | |
201 | elems->ext_supp_rates = pos; | |
202 | elems->ext_supp_rates_len = elen; | |
203 | break; | |
204 | default: | |
205 | #if 0 | |
206 | printk(KERN_DEBUG "IEEE 802.11 element parse ignored " | |
207 | "unknown element (id=%d elen=%d)\n", | |
208 | id, elen); | |
209 | #endif | |
210 | unknown++; | |
211 | break; | |
212 | } | |
213 | ||
214 | left -= elen; | |
215 | pos += elen; | |
216 | } | |
217 | ||
218 | /* Do not trigger error if left == 1 as Apple Airport base stations | |
219 | * send AssocResps that are one spurious byte too long. */ | |
220 | ||
221 | return unknown ? ParseUnknown : ParseOK; | |
222 | } | |
223 | ||
224 | ||
225 | ||
226 | ||
227 | static int ecw2cw(int ecw) | |
228 | { | |
229 | int cw = 1; | |
230 | while (ecw > 0) { | |
231 | cw <<= 1; | |
232 | ecw--; | |
233 | } | |
234 | return cw - 1; | |
235 | } | |
236 | ||
237 | ||
238 | static void ieee80211_sta_wmm_params(struct net_device *dev, | |
239 | struct ieee80211_if_sta *ifsta, | |
240 | u8 *wmm_param, size_t wmm_param_len) | |
241 | { | |
242 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
243 | struct ieee80211_tx_queue_params params; | |
244 | size_t left; | |
245 | int count; | |
246 | u8 *pos; | |
247 | ||
248 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
249 | return; | |
250 | count = wmm_param[6] & 0x0f; | |
251 | if (count == ifsta->wmm_last_param_set) | |
252 | return; | |
253 | ifsta->wmm_last_param_set = count; | |
254 | ||
255 | pos = wmm_param + 8; | |
256 | left = wmm_param_len - 8; | |
257 | ||
258 | memset(¶ms, 0, sizeof(params)); | |
259 | ||
260 | if (!local->ops->conf_tx) | |
261 | return; | |
262 | ||
263 | local->wmm_acm = 0; | |
264 | for (; left >= 4; left -= 4, pos += 4) { | |
265 | int aci = (pos[0] >> 5) & 0x03; | |
266 | int acm = (pos[0] >> 4) & 0x01; | |
267 | int queue; | |
268 | ||
269 | switch (aci) { | |
270 | case 1: | |
271 | queue = IEEE80211_TX_QUEUE_DATA3; | |
272 | if (acm) { | |
273 | local->wmm_acm |= BIT(0) | BIT(3); | |
274 | } | |
275 | break; | |
276 | case 2: | |
277 | queue = IEEE80211_TX_QUEUE_DATA1; | |
278 | if (acm) { | |
279 | local->wmm_acm |= BIT(4) | BIT(5); | |
280 | } | |
281 | break; | |
282 | case 3: | |
283 | queue = IEEE80211_TX_QUEUE_DATA0; | |
284 | if (acm) { | |
285 | local->wmm_acm |= BIT(6) | BIT(7); | |
286 | } | |
287 | break; | |
288 | case 0: | |
289 | default: | |
290 | queue = IEEE80211_TX_QUEUE_DATA2; | |
291 | if (acm) { | |
292 | local->wmm_acm |= BIT(1) | BIT(2); | |
293 | } | |
294 | break; | |
295 | } | |
296 | ||
297 | params.aifs = pos[0] & 0x0f; | |
298 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
299 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
300 | /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ | |
301 | params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; | |
302 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
303 | "cWmin=%d cWmax=%d burst=%d\n", | |
304 | dev->name, queue, aci, acm, params.aifs, params.cw_min, | |
305 | params.cw_max, params.burst_time); | |
306 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
307 | * AC for now) */ | |
308 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
309 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
310 | "parameters for queue %d\n", dev->name, queue); | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | ||
5628221c DD |
316 | static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) |
317 | { | |
5628221c DD |
318 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
319 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
320 | int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
7e9ed188 | 321 | int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0; |
d9430a32 | 322 | u8 changes = 0; |
5628221c | 323 | |
63fc33ce | 324 | if (use_protection != sdata->use_protection) { |
5628221c DD |
325 | if (net_ratelimit()) { |
326 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
327 | MAC_FMT ")\n", | |
328 | dev->name, | |
329 | use_protection ? "enabled" : "disabled", | |
330 | MAC_ARG(ifsta->bssid)); | |
331 | } | |
63fc33ce | 332 | sdata->use_protection = use_protection; |
d9430a32 | 333 | changes |= IEEE80211_ERP_CHANGE_PROTECTION; |
5628221c | 334 | } |
7e9ed188 DD |
335 | |
336 | if (!preamble_mode != sdata->short_preamble) { | |
337 | if (net_ratelimit()) { | |
338 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
339 | " (BSSID=" MAC_FMT ")\n", | |
340 | dev->name, | |
341 | (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ? | |
342 | "short" : "long", | |
343 | MAC_ARG(ifsta->bssid)); | |
344 | } | |
345 | sdata->short_preamble = !preamble_mode; | |
d9430a32 | 346 | changes |= IEEE80211_ERP_CHANGE_PREAMBLE; |
7e9ed188 | 347 | } |
d9430a32 DD |
348 | |
349 | if (changes) | |
350 | ieee80211_erp_info_change_notify(dev, changes); | |
5628221c DD |
351 | } |
352 | ||
353 | ||
f0706e82 JB |
354 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
355 | struct ieee80211_if_sta *ifsta) | |
356 | { | |
357 | char *buf; | |
358 | size_t len; | |
359 | int i; | |
360 | union iwreq_data wrqu; | |
361 | ||
362 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
363 | return; | |
364 | ||
365 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 366 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
367 | if (!buf) |
368 | return; | |
369 | ||
370 | len = sprintf(buf, "ASSOCINFO("); | |
371 | if (ifsta->assocreq_ies) { | |
372 | len += sprintf(buf + len, "ReqIEs="); | |
373 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
374 | len += sprintf(buf + len, "%02x", | |
375 | ifsta->assocreq_ies[i]); | |
376 | } | |
377 | } | |
378 | if (ifsta->assocresp_ies) { | |
379 | if (ifsta->assocreq_ies) | |
380 | len += sprintf(buf + len, " "); | |
381 | len += sprintf(buf + len, "RespIEs="); | |
382 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
383 | len += sprintf(buf + len, "%02x", | |
384 | ifsta->assocresp_ies[i]); | |
385 | } | |
386 | } | |
387 | len += sprintf(buf + len, ")"); | |
388 | ||
389 | if (len > IW_CUSTOM_MAX) { | |
390 | len = sprintf(buf, "ASSOCRESPIE="); | |
391 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
392 | len += sprintf(buf + len, "%02x", | |
393 | ifsta->assocresp_ies[i]); | |
394 | } | |
395 | } | |
396 | ||
397 | memset(&wrqu, 0, sizeof(wrqu)); | |
398 | wrqu.data.length = len; | |
399 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
400 | ||
401 | kfree(buf); | |
402 | } | |
403 | ||
404 | ||
405 | static void ieee80211_set_associated(struct net_device *dev, | |
406 | struct ieee80211_if_sta *ifsta, int assoc) | |
407 | { | |
408 | union iwreq_data wrqu; | |
409 | ||
410 | if (ifsta->associated == assoc) | |
411 | return; | |
412 | ||
413 | ifsta->associated = assoc; | |
414 | ||
415 | if (assoc) { | |
416 | struct ieee80211_sub_if_data *sdata; | |
5628221c | 417 | struct ieee80211_sta_bss *bss; |
f0706e82 JB |
418 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
419 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
420 | return; | |
5628221c DD |
421 | |
422 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
423 | if (bss) { | |
424 | if (bss->has_erp_value) | |
425 | ieee80211_handle_erp_ie(dev, bss->erp_value); | |
426 | ieee80211_rx_bss_put(dev, bss); | |
427 | } | |
428 | ||
f0706e82 JB |
429 | netif_carrier_on(dev); |
430 | ifsta->prev_bssid_set = 1; | |
431 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); | |
432 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
433 | ieee80211_sta_send_associnfo(dev, ifsta); | |
434 | } else { | |
435 | netif_carrier_off(dev); | |
d9430a32 | 436 | ieee80211_reset_erp_info(dev); |
f0706e82 JB |
437 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
438 | } | |
439 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
440 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
441 | ifsta->last_probe = jiffies; | |
442 | } | |
443 | ||
444 | static void ieee80211_set_disassoc(struct net_device *dev, | |
445 | struct ieee80211_if_sta *ifsta, int deauth) | |
446 | { | |
447 | if (deauth) | |
448 | ifsta->auth_tries = 0; | |
449 | ifsta->assoc_tries = 0; | |
450 | ieee80211_set_associated(dev, ifsta, 0); | |
451 | } | |
452 | ||
453 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
454 | int encrypt) | |
455 | { | |
456 | struct ieee80211_sub_if_data *sdata; | |
457 | struct ieee80211_tx_packet_data *pkt_data; | |
458 | ||
459 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
460 | skb->dev = sdata->local->mdev; | |
461 | skb_set_mac_header(skb, 0); | |
462 | skb_set_network_header(skb, 0); | |
463 | skb_set_transport_header(skb, 0); | |
464 | ||
465 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
466 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
467 | pkt_data->ifindex = sdata->dev->ifindex; | |
468 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
469 | pkt_data->do_not_encrypt = !encrypt; | |
470 | ||
471 | dev_queue_xmit(skb); | |
472 | } | |
473 | ||
474 | ||
475 | static void ieee80211_send_auth(struct net_device *dev, | |
476 | struct ieee80211_if_sta *ifsta, | |
477 | int transaction, u8 *extra, size_t extra_len, | |
478 | int encrypt) | |
479 | { | |
480 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
481 | struct sk_buff *skb; | |
482 | struct ieee80211_mgmt *mgmt; | |
483 | ||
484 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
485 | sizeof(*mgmt) + 6 + extra_len); | |
486 | if (!skb) { | |
487 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
488 | "frame\n", dev->name); | |
489 | return; | |
490 | } | |
491 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
492 | ||
493 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
494 | memset(mgmt, 0, 24 + 6); | |
495 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
496 | IEEE80211_STYPE_AUTH); | |
497 | if (encrypt) | |
498 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
499 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
500 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
501 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
502 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
503 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
504 | ifsta->auth_transaction = transaction + 1; | |
505 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
506 | if (extra) | |
507 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
508 | ||
509 | ieee80211_sta_tx(dev, skb, encrypt); | |
510 | } | |
511 | ||
512 | ||
513 | static void ieee80211_authenticate(struct net_device *dev, | |
514 | struct ieee80211_if_sta *ifsta) | |
515 | { | |
516 | ifsta->auth_tries++; | |
517 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
518 | printk(KERN_DEBUG "%s: authentication with AP " MAC_FMT | |
519 | " timed out\n", | |
520 | dev->name, MAC_ARG(ifsta->bssid)); | |
521 | ifsta->state = IEEE80211_DISABLED; | |
522 | return; | |
523 | } | |
524 | ||
525 | ifsta->state = IEEE80211_AUTHENTICATE; | |
526 | printk(KERN_DEBUG "%s: authenticate with AP " MAC_FMT "\n", | |
527 | dev->name, MAC_ARG(ifsta->bssid)); | |
528 | ||
529 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
530 | ||
531 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
532 | } | |
533 | ||
534 | ||
535 | static void ieee80211_send_assoc(struct net_device *dev, | |
536 | struct ieee80211_if_sta *ifsta) | |
537 | { | |
538 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
539 | struct ieee80211_hw_mode *mode; | |
540 | struct sk_buff *skb; | |
541 | struct ieee80211_mgmt *mgmt; | |
542 | u8 *pos, *ies; | |
543 | int i, len; | |
544 | u16 capab; | |
545 | struct ieee80211_sta_bss *bss; | |
546 | int wmm = 0; | |
547 | ||
548 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
549 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
550 | ifsta->ssid_len); | |
551 | if (!skb) { | |
552 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
553 | "frame\n", dev->name); | |
554 | return; | |
555 | } | |
556 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
557 | ||
558 | mode = local->oper_hw_mode; | |
559 | capab = ifsta->capab; | |
560 | if (mode->mode == MODE_IEEE80211G) { | |
561 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
562 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
563 | } | |
564 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
565 | if (bss) { | |
566 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
567 | capab |= WLAN_CAPABILITY_PRIVACY; | |
568 | if (bss->wmm_ie) { | |
569 | wmm = 1; | |
570 | } | |
571 | ieee80211_rx_bss_put(dev, bss); | |
572 | } | |
573 | ||
574 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
575 | memset(mgmt, 0, 24); | |
576 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
577 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
578 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
579 | ||
580 | if (ifsta->prev_bssid_set) { | |
581 | skb_put(skb, 10); | |
582 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
583 | IEEE80211_STYPE_REASSOC_REQ); | |
584 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
585 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
586 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
587 | ETH_ALEN); | |
588 | } else { | |
589 | skb_put(skb, 4); | |
590 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
591 | IEEE80211_STYPE_ASSOC_REQ); | |
592 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
593 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
594 | } | |
595 | ||
596 | /* SSID */ | |
597 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
598 | *pos++ = WLAN_EID_SSID; | |
599 | *pos++ = ifsta->ssid_len; | |
600 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
601 | ||
602 | len = mode->num_rates; | |
603 | if (len > 8) | |
604 | len = 8; | |
605 | pos = skb_put(skb, len + 2); | |
606 | *pos++ = WLAN_EID_SUPP_RATES; | |
607 | *pos++ = len; | |
608 | for (i = 0; i < len; i++) { | |
609 | int rate = mode->rates[i].rate; | |
610 | if (mode->mode == MODE_ATHEROS_TURBO) | |
611 | rate /= 2; | |
612 | *pos++ = (u8) (rate / 5); | |
613 | } | |
614 | ||
615 | if (mode->num_rates > len) { | |
616 | pos = skb_put(skb, mode->num_rates - len + 2); | |
617 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
618 | *pos++ = mode->num_rates - len; | |
619 | for (i = len; i < mode->num_rates; i++) { | |
620 | int rate = mode->rates[i].rate; | |
621 | if (mode->mode == MODE_ATHEROS_TURBO) | |
622 | rate /= 2; | |
623 | *pos++ = (u8) (rate / 5); | |
624 | } | |
625 | } | |
626 | ||
627 | if (ifsta->extra_ie) { | |
628 | pos = skb_put(skb, ifsta->extra_ie_len); | |
629 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
630 | } | |
631 | ||
632 | if (wmm && ifsta->wmm_enabled) { | |
633 | pos = skb_put(skb, 9); | |
634 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
635 | *pos++ = 7; /* len */ | |
636 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
637 | *pos++ = 0x50; | |
638 | *pos++ = 0xf2; | |
639 | *pos++ = 2; /* WME */ | |
640 | *pos++ = 0; /* WME info */ | |
641 | *pos++ = 1; /* WME ver */ | |
642 | *pos++ = 0; | |
643 | } | |
644 | ||
645 | kfree(ifsta->assocreq_ies); | |
646 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 647 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
648 | if (ifsta->assocreq_ies) |
649 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
650 | ||
651 | ieee80211_sta_tx(dev, skb, 0); | |
652 | } | |
653 | ||
654 | ||
655 | static void ieee80211_send_deauth(struct net_device *dev, | |
656 | struct ieee80211_if_sta *ifsta, u16 reason) | |
657 | { | |
658 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
659 | struct sk_buff *skb; | |
660 | struct ieee80211_mgmt *mgmt; | |
661 | ||
662 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
663 | if (!skb) { | |
664 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
665 | "frame\n", dev->name); | |
666 | return; | |
667 | } | |
668 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
669 | ||
670 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
671 | memset(mgmt, 0, 24); | |
672 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
673 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
674 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
675 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
676 | IEEE80211_STYPE_DEAUTH); | |
677 | skb_put(skb, 2); | |
678 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
679 | ||
680 | ieee80211_sta_tx(dev, skb, 0); | |
681 | } | |
682 | ||
683 | ||
684 | static void ieee80211_send_disassoc(struct net_device *dev, | |
685 | struct ieee80211_if_sta *ifsta, u16 reason) | |
686 | { | |
687 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
688 | struct sk_buff *skb; | |
689 | struct ieee80211_mgmt *mgmt; | |
690 | ||
691 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
692 | if (!skb) { | |
693 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
694 | "frame\n", dev->name); | |
695 | return; | |
696 | } | |
697 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
698 | ||
699 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
700 | memset(mgmt, 0, 24); | |
701 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
702 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
703 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
704 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
705 | IEEE80211_STYPE_DISASSOC); | |
706 | skb_put(skb, 2); | |
707 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
708 | ||
709 | ieee80211_sta_tx(dev, skb, 0); | |
710 | } | |
711 | ||
712 | ||
713 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
714 | struct ieee80211_if_sta *ifsta) | |
715 | { | |
716 | struct ieee80211_sta_bss *bss; | |
717 | int res = 0; | |
718 | ||
719 | if (!ifsta || ifsta->mixed_cell || | |
720 | ifsta->key_mgmt != IEEE80211_KEY_MGMT_NONE) | |
721 | return 0; | |
722 | ||
723 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
724 | if (!bss) | |
725 | return 0; | |
726 | ||
727 | if (ieee80211_sta_wep_configured(dev) != | |
728 | !!(bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
729 | res = 1; | |
730 | ||
731 | ieee80211_rx_bss_put(dev, bss); | |
732 | ||
733 | return res; | |
734 | } | |
735 | ||
736 | ||
737 | static void ieee80211_associate(struct net_device *dev, | |
738 | struct ieee80211_if_sta *ifsta) | |
739 | { | |
740 | ifsta->assoc_tries++; | |
741 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
742 | printk(KERN_DEBUG "%s: association with AP " MAC_FMT | |
743 | " timed out\n", | |
744 | dev->name, MAC_ARG(ifsta->bssid)); | |
745 | ifsta->state = IEEE80211_DISABLED; | |
746 | return; | |
747 | } | |
748 | ||
749 | ifsta->state = IEEE80211_ASSOCIATE; | |
750 | printk(KERN_DEBUG "%s: associate with AP " MAC_FMT "\n", | |
751 | dev->name, MAC_ARG(ifsta->bssid)); | |
752 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
753 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
754 | "mixed-cell disabled - abort association\n", dev->name); | |
755 | ifsta->state = IEEE80211_DISABLED; | |
756 | return; | |
757 | } | |
758 | ||
759 | ieee80211_send_assoc(dev, ifsta); | |
760 | ||
761 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
762 | } | |
763 | ||
764 | ||
765 | static void ieee80211_associated(struct net_device *dev, | |
766 | struct ieee80211_if_sta *ifsta) | |
767 | { | |
768 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
769 | struct sta_info *sta; | |
770 | int disassoc; | |
771 | ||
772 | /* TODO: start monitoring current AP signal quality and number of | |
773 | * missed beacons. Scan other channels every now and then and search | |
774 | * for better APs. */ | |
775 | /* TODO: remove expired BSSes */ | |
776 | ||
777 | ifsta->state = IEEE80211_ASSOCIATED; | |
778 | ||
779 | sta = sta_info_get(local, ifsta->bssid); | |
780 | if (!sta) { | |
781 | printk(KERN_DEBUG "%s: No STA entry for own AP " MAC_FMT "\n", | |
782 | dev->name, MAC_ARG(ifsta->bssid)); | |
783 | disassoc = 1; | |
784 | } else { | |
785 | disassoc = 0; | |
786 | if (time_after(jiffies, | |
787 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
788 | if (ifsta->probereq_poll) { | |
789 | printk(KERN_DEBUG "%s: No ProbeResp from " | |
790 | "current AP " MAC_FMT " - assume out of " | |
791 | "range\n", | |
792 | dev->name, MAC_ARG(ifsta->bssid)); | |
793 | disassoc = 1; | |
be8755e1 | 794 | sta_info_free(sta); |
f0706e82 JB |
795 | ifsta->probereq_poll = 0; |
796 | } else { | |
797 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
798 | local->scan_ssid, | |
799 | local->scan_ssid_len); | |
800 | ifsta->probereq_poll = 1; | |
801 | } | |
802 | } else { | |
803 | ifsta->probereq_poll = 0; | |
804 | if (time_after(jiffies, ifsta->last_probe + | |
805 | IEEE80211_PROBE_INTERVAL)) { | |
806 | ifsta->last_probe = jiffies; | |
807 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
808 | ifsta->ssid, | |
809 | ifsta->ssid_len); | |
810 | } | |
811 | } | |
812 | sta_info_put(sta); | |
813 | } | |
814 | if (disassoc) { | |
815 | union iwreq_data wrqu; | |
816 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
817 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
818 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
819 | mod_timer(&ifsta->timer, jiffies + | |
820 | IEEE80211_MONITORING_INTERVAL + 30 * HZ); | |
821 | } else { | |
822 | mod_timer(&ifsta->timer, jiffies + | |
823 | IEEE80211_MONITORING_INTERVAL); | |
824 | } | |
825 | } | |
826 | ||
827 | ||
828 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
829 | u8 *ssid, size_t ssid_len) | |
830 | { | |
831 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
832 | struct ieee80211_hw_mode *mode; | |
833 | struct sk_buff *skb; | |
834 | struct ieee80211_mgmt *mgmt; | |
835 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
836 | int i; | |
837 | ||
838 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
839 | if (!skb) { | |
840 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
841 | "request\n", dev->name); | |
842 | return; | |
843 | } | |
844 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
845 | ||
846 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
847 | memset(mgmt, 0, 24); | |
848 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
849 | IEEE80211_STYPE_PROBE_REQ); | |
850 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
851 | if (dst) { | |
852 | memcpy(mgmt->da, dst, ETH_ALEN); | |
853 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
854 | } else { | |
855 | memset(mgmt->da, 0xff, ETH_ALEN); | |
856 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
857 | } | |
858 | pos = skb_put(skb, 2 + ssid_len); | |
859 | *pos++ = WLAN_EID_SSID; | |
860 | *pos++ = ssid_len; | |
861 | memcpy(pos, ssid, ssid_len); | |
862 | ||
863 | supp_rates = skb_put(skb, 2); | |
864 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
865 | supp_rates[1] = 0; | |
866 | mode = local->oper_hw_mode; | |
867 | for (i = 0; i < mode->num_rates; i++) { | |
868 | struct ieee80211_rate *rate = &mode->rates[i]; | |
869 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
870 | continue; | |
871 | if (esupp_rates) { | |
872 | pos = skb_put(skb, 1); | |
873 | esupp_rates[1]++; | |
874 | } else if (supp_rates[1] == 8) { | |
875 | esupp_rates = skb_put(skb, 3); | |
876 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
877 | esupp_rates[1] = 1; | |
878 | pos = &esupp_rates[2]; | |
879 | } else { | |
880 | pos = skb_put(skb, 1); | |
881 | supp_rates[1]++; | |
882 | } | |
883 | if (mode->mode == MODE_ATHEROS_TURBO) | |
884 | *pos = rate->rate / 10; | |
885 | else | |
886 | *pos = rate->rate / 5; | |
887 | } | |
888 | ||
889 | ieee80211_sta_tx(dev, skb, 0); | |
890 | } | |
891 | ||
892 | ||
893 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
894 | { | |
895 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
896 | if (!sdata || !sdata->default_key || | |
897 | sdata->default_key->alg != ALG_WEP) | |
898 | return 0; | |
899 | return 1; | |
900 | } | |
901 | ||
902 | ||
903 | static void ieee80211_auth_completed(struct net_device *dev, | |
904 | struct ieee80211_if_sta *ifsta) | |
905 | { | |
906 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
907 | ifsta->authenticated = 1; | |
908 | ieee80211_associate(dev, ifsta); | |
909 | } | |
910 | ||
911 | ||
912 | static void ieee80211_auth_challenge(struct net_device *dev, | |
913 | struct ieee80211_if_sta *ifsta, | |
914 | struct ieee80211_mgmt *mgmt, | |
915 | size_t len) | |
916 | { | |
917 | u8 *pos; | |
918 | struct ieee802_11_elems elems; | |
919 | ||
920 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
921 | pos = mgmt->u.auth.variable; | |
922 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
923 | == ParseFailed) { | |
924 | printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n", | |
925 | dev->name); | |
926 | return; | |
927 | } | |
928 | if (!elems.challenge) { | |
929 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
930 | "frame\n", dev->name); | |
931 | return; | |
932 | } | |
933 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
934 | elems.challenge_len + 2, 1); | |
935 | } | |
936 | ||
937 | ||
938 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, | |
939 | struct ieee80211_if_sta *ifsta, | |
940 | struct ieee80211_mgmt *mgmt, | |
941 | size_t len) | |
942 | { | |
943 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
944 | u16 auth_alg, auth_transaction, status_code; | |
945 | ||
946 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
947 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
948 | printk(KERN_DEBUG "%s: authentication frame received from " | |
949 | MAC_FMT ", but not in authenticate state - ignored\n", | |
950 | dev->name, MAC_ARG(mgmt->sa)); | |
951 | return; | |
952 | } | |
953 | ||
954 | if (len < 24 + 6) { | |
955 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
956 | "received from " MAC_FMT " - ignored\n", | |
957 | dev->name, len, MAC_ARG(mgmt->sa)); | |
958 | return; | |
959 | } | |
960 | ||
961 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
962 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
963 | printk(KERN_DEBUG "%s: authentication frame received from " | |
964 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
965 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
966 | MAC_ARG(mgmt->bssid)); | |
967 | return; | |
968 | } | |
969 | ||
970 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
971 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { | |
972 | printk(KERN_DEBUG "%s: authentication frame received from " | |
973 | "unknown BSSID (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
974 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
975 | MAC_ARG(mgmt->bssid)); | |
976 | return; | |
977 | } | |
978 | ||
979 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
980 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
981 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
982 | ||
983 | printk(KERN_DEBUG "%s: RX authentication from " MAC_FMT " (alg=%d " | |
984 | "transaction=%d status=%d)\n", | |
985 | dev->name, MAC_ARG(mgmt->sa), auth_alg, | |
986 | auth_transaction, status_code); | |
987 | ||
988 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
989 | /* IEEE 802.11 standard does not require authentication in IBSS | |
990 | * networks and most implementations do not seem to use it. | |
991 | * However, try to reply to authentication attempts if someone | |
992 | * has actually implemented this. | |
993 | * TODO: Could implement shared key authentication. */ | |
994 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
995 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
996 | "frame (alg=%d transaction=%d)\n", | |
997 | dev->name, auth_alg, auth_transaction); | |
998 | return; | |
999 | } | |
1000 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
1001 | } | |
1002 | ||
1003 | if (auth_alg != ifsta->auth_alg || | |
1004 | auth_transaction != ifsta->auth_transaction) { | |
1005 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
1006 | "(alg=%d transaction=%d)\n", | |
1007 | dev->name, auth_alg, auth_transaction); | |
1008 | return; | |
1009 | } | |
1010 | ||
1011 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1012 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
1013 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
1014 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1015 | u8 algs[3]; | |
1016 | const int num_algs = ARRAY_SIZE(algs); | |
1017 | int i, pos; | |
1018 | algs[0] = algs[1] = algs[2] = 0xff; | |
1019 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1020 | algs[0] = WLAN_AUTH_OPEN; | |
1021 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1022 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1023 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1024 | algs[2] = WLAN_AUTH_LEAP; | |
1025 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1026 | pos = 0; | |
1027 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1028 | pos = 1; | |
1029 | else | |
1030 | pos = 2; | |
1031 | for (i = 0; i < num_algs; i++) { | |
1032 | pos++; | |
1033 | if (pos >= num_algs) | |
1034 | pos = 0; | |
1035 | if (algs[pos] == ifsta->auth_alg || | |
1036 | algs[pos] == 0xff) | |
1037 | continue; | |
1038 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1039 | !ieee80211_sta_wep_configured(dev)) | |
1040 | continue; | |
1041 | ifsta->auth_alg = algs[pos]; | |
1042 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1043 | "next try\n", | |
1044 | dev->name, ifsta->auth_alg); | |
1045 | break; | |
1046 | } | |
1047 | } | |
1048 | return; | |
1049 | } | |
1050 | ||
1051 | switch (ifsta->auth_alg) { | |
1052 | case WLAN_AUTH_OPEN: | |
1053 | case WLAN_AUTH_LEAP: | |
1054 | ieee80211_auth_completed(dev, ifsta); | |
1055 | break; | |
1056 | case WLAN_AUTH_SHARED_KEY: | |
1057 | if (ifsta->auth_transaction == 4) | |
1058 | ieee80211_auth_completed(dev, ifsta); | |
1059 | else | |
1060 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1061 | break; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | ||
1066 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1067 | struct ieee80211_if_sta *ifsta, | |
1068 | struct ieee80211_mgmt *mgmt, | |
1069 | size_t len) | |
1070 | { | |
1071 | u16 reason_code; | |
1072 | ||
1073 | if (len < 24 + 2) { | |
1074 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
1075 | "received from " MAC_FMT " - ignored\n", | |
1076 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1077 | return; | |
1078 | } | |
1079 | ||
1080 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1081 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
1082 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1083 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1084 | MAC_ARG(mgmt->bssid)); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1089 | ||
1090 | printk(KERN_DEBUG "%s: RX deauthentication from " MAC_FMT | |
1091 | " (reason=%d)\n", | |
1092 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1093 | ||
1094 | if (ifsta->authenticated) { | |
1095 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); | |
1096 | } | |
1097 | ||
1098 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1099 | ifsta->state == IEEE80211_ASSOCIATE || | |
1100 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1101 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1102 | mod_timer(&ifsta->timer, jiffies + | |
1103 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1104 | } | |
1105 | ||
1106 | ieee80211_set_disassoc(dev, ifsta, 1); | |
1107 | ifsta->authenticated = 0; | |
1108 | } | |
1109 | ||
1110 | ||
1111 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1112 | struct ieee80211_if_sta *ifsta, | |
1113 | struct ieee80211_mgmt *mgmt, | |
1114 | size_t len) | |
1115 | { | |
1116 | u16 reason_code; | |
1117 | ||
1118 | if (len < 24 + 2) { | |
1119 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
1120 | "received from " MAC_FMT " - ignored\n", | |
1121 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1122 | return; | |
1123 | } | |
1124 | ||
1125 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1126 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
1127 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1128 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1129 | MAC_ARG(mgmt->bssid)); | |
1130 | return; | |
1131 | } | |
1132 | ||
1133 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1134 | ||
1135 | printk(KERN_DEBUG "%s: RX disassociation from " MAC_FMT | |
1136 | " (reason=%d)\n", | |
1137 | dev->name, MAC_ARG(mgmt->sa), reason_code); | |
1138 | ||
1139 | if (ifsta->associated) | |
1140 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); | |
1141 | ||
1142 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1143 | ifsta->state = IEEE80211_ASSOCIATE; | |
1144 | mod_timer(&ifsta->timer, jiffies + | |
1145 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1146 | } | |
1147 | ||
1148 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1149 | } | |
1150 | ||
1151 | ||
1152 | static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, | |
1153 | struct ieee80211_if_sta *ifsta, | |
1154 | struct ieee80211_mgmt *mgmt, | |
1155 | size_t len, | |
1156 | int reassoc) | |
1157 | { | |
1158 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1159 | struct ieee80211_hw_mode *mode; | |
1160 | struct sta_info *sta; | |
1161 | u32 rates; | |
1162 | u16 capab_info, status_code, aid; | |
1163 | struct ieee802_11_elems elems; | |
1164 | u8 *pos; | |
1165 | int i, j; | |
1166 | ||
1167 | /* AssocResp and ReassocResp have identical structure, so process both | |
1168 | * of them in this function. */ | |
1169 | ||
1170 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1171 | printk(KERN_DEBUG "%s: association frame received from " | |
1172 | MAC_FMT ", but not in associate state - ignored\n", | |
1173 | dev->name, MAC_ARG(mgmt->sa)); | |
1174 | return; | |
1175 | } | |
1176 | ||
1177 | if (len < 24 + 6) { | |
1178 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
1179 | "received from " MAC_FMT " - ignored\n", | |
1180 | dev->name, len, MAC_ARG(mgmt->sa)); | |
1181 | return; | |
1182 | } | |
1183 | ||
1184 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1185 | printk(KERN_DEBUG "%s: association frame received from " | |
1186 | "unknown AP (SA=" MAC_FMT " BSSID=" MAC_FMT ") - " | |
1187 | "ignored\n", dev->name, MAC_ARG(mgmt->sa), | |
1188 | MAC_ARG(mgmt->bssid)); | |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1193 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1194 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1195 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1196 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1197 | "set\n", dev->name, aid); | |
1198 | aid &= ~(BIT(15) | BIT(14)); | |
1199 | ||
1200 | printk(KERN_DEBUG "%s: RX %sssocResp from " MAC_FMT " (capab=0x%x " | |
1201 | "status=%d aid=%d)\n", | |
1202 | dev->name, reassoc ? "Rea" : "A", MAC_ARG(mgmt->sa), | |
1203 | capab_info, status_code, aid); | |
1204 | ||
1205 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1206 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1207 | dev->name, status_code); | |
8a69aa93 DD |
1208 | /* if this was a reassociation, ensure we try a "full" |
1209 | * association next time. This works around some broken APs | |
1210 | * which do not correctly reject reassociation requests. */ | |
1211 | ifsta->prev_bssid_set = 0; | |
f0706e82 JB |
1212 | return; |
1213 | } | |
1214 | ||
1215 | pos = mgmt->u.assoc_resp.variable; | |
1216 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
1217 | == ParseFailed) { | |
1218 | printk(KERN_DEBUG "%s: failed to parse AssocResp\n", | |
1219 | dev->name); | |
1220 | return; | |
1221 | } | |
1222 | ||
1223 | if (!elems.supp_rates) { | |
1224 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1225 | dev->name); | |
1226 | return; | |
1227 | } | |
1228 | ||
5628221c DD |
1229 | /* it probably doesn't, but if the frame includes an ERP value then |
1230 | * update our stored copy */ | |
1231 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1232 | struct ieee80211_sta_bss *bss | |
1233 | = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1234 | if (bss) { | |
1235 | bss->erp_value = elems.erp_info[0]; | |
1236 | bss->has_erp_value = 1; | |
1237 | ieee80211_rx_bss_put(dev, bss); | |
1238 | } | |
1239 | } | |
1240 | ||
f0706e82 JB |
1241 | printk(KERN_DEBUG "%s: associated\n", dev->name); |
1242 | ifsta->aid = aid; | |
1243 | ifsta->ap_capab = capab_info; | |
1244 | ||
1245 | kfree(ifsta->assocresp_ies); | |
1246 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1247 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1248 | if (ifsta->assocresp_ies) |
1249 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1250 | ||
1251 | ieee80211_set_associated(dev, ifsta, 1); | |
1252 | ||
1253 | /* Add STA entry for the AP */ | |
1254 | sta = sta_info_get(local, ifsta->bssid); | |
1255 | if (!sta) { | |
1256 | struct ieee80211_sta_bss *bss; | |
0ec0b7ac | 1257 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL); |
f0706e82 JB |
1258 | if (!sta) { |
1259 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1260 | " AP\n", dev->name); | |
1261 | return; | |
1262 | } | |
1263 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1264 | if (bss) { | |
1265 | sta->last_rssi = bss->rssi; | |
1266 | sta->last_signal = bss->signal; | |
1267 | sta->last_noise = bss->noise; | |
1268 | ieee80211_rx_bss_put(dev, bss); | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | sta->dev = dev; | |
1273 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; | |
1274 | sta->assoc_ap = 1; | |
1275 | ||
1276 | rates = 0; | |
1277 | mode = local->oper_hw_mode; | |
1278 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1279 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
1280 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1281 | rate *= 2; | |
1282 | for (j = 0; j < mode->num_rates; j++) | |
1283 | if (mode->rates[j].rate == rate) | |
1284 | rates |= BIT(j); | |
1285 | } | |
1286 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1287 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
1288 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1289 | rate *= 2; | |
1290 | for (j = 0; j < mode->num_rates; j++) | |
1291 | if (mode->rates[j].rate == rate) | |
1292 | rates |= BIT(j); | |
1293 | } | |
1294 | sta->supp_rates = rates; | |
1295 | ||
1296 | rate_control_rate_init(sta, local); | |
1297 | ||
1298 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1299 | sta->flags |= WLAN_STA_WME; | |
1300 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1301 | elems.wmm_param_len); | |
1302 | } | |
1303 | ||
1304 | ||
1305 | sta_info_put(sta); | |
1306 | ||
1307 | ieee80211_associated(dev, ifsta); | |
1308 | } | |
1309 | ||
1310 | ||
1311 | /* Caller must hold local->sta_bss_lock */ | |
1312 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1313 | struct ieee80211_sta_bss *bss) | |
1314 | { | |
1315 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1316 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1317 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1318 | } | |
1319 | ||
1320 | ||
1321 | /* Caller must hold local->sta_bss_lock */ | |
1322 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1323 | struct ieee80211_sta_bss *bss) | |
1324 | { | |
1325 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1326 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1327 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1328 | while (b) { | |
1329 | if (b == bss) { | |
1330 | if (!prev) | |
1331 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1332 | bss->hnext; | |
1333 | else | |
1334 | prev->hnext = bss->hnext; | |
1335 | break; | |
1336 | } | |
1337 | prev = b; | |
1338 | b = b->hnext; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | ||
1343 | static struct ieee80211_sta_bss * | |
1344 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid) | |
1345 | { | |
1346 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1347 | struct ieee80211_sta_bss *bss; | |
1348 | ||
dd00cc48 | 1349 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
1350 | if (!bss) |
1351 | return NULL; | |
f0706e82 JB |
1352 | atomic_inc(&bss->users); |
1353 | atomic_inc(&bss->users); | |
1354 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
1355 | ||
1356 | spin_lock_bh(&local->sta_bss_lock); | |
1357 | /* TODO: order by RSSI? */ | |
1358 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1359 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1360 | spin_unlock_bh(&local->sta_bss_lock); | |
1361 | return bss; | |
1362 | } | |
1363 | ||
1364 | ||
1365 | static struct ieee80211_sta_bss * | |
1366 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid) | |
1367 | { | |
1368 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1369 | struct ieee80211_sta_bss *bss; | |
1370 | ||
1371 | spin_lock_bh(&local->sta_bss_lock); | |
1372 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1373 | while (bss) { | |
1374 | if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) { | |
1375 | atomic_inc(&bss->users); | |
1376 | break; | |
1377 | } | |
1378 | bss = bss->hnext; | |
1379 | } | |
1380 | spin_unlock_bh(&local->sta_bss_lock); | |
1381 | return bss; | |
1382 | } | |
1383 | ||
1384 | ||
1385 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1386 | { | |
1387 | kfree(bss->wpa_ie); | |
1388 | kfree(bss->rsn_ie); | |
1389 | kfree(bss->wmm_ie); | |
1390 | kfree(bss); | |
1391 | } | |
1392 | ||
1393 | ||
1394 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1395 | struct ieee80211_sta_bss *bss) | |
1396 | { | |
1397 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1398 | if (!atomic_dec_and_test(&bss->users)) | |
1399 | return; | |
1400 | ||
1401 | spin_lock_bh(&local->sta_bss_lock); | |
1402 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1403 | list_del(&bss->list); | |
1404 | spin_unlock_bh(&local->sta_bss_lock); | |
1405 | ieee80211_rx_bss_free(bss); | |
1406 | } | |
1407 | ||
1408 | ||
1409 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1410 | { | |
1411 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1412 | spin_lock_init(&local->sta_bss_lock); | |
1413 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1414 | } | |
1415 | ||
1416 | ||
1417 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1418 | { | |
1419 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1420 | struct ieee80211_sta_bss *bss, *tmp; | |
1421 | ||
1422 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1423 | ieee80211_rx_bss_put(dev, bss); | |
1424 | } | |
1425 | ||
1426 | ||
1427 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1428 | struct ieee80211_mgmt *mgmt, | |
1429 | size_t len, | |
1430 | struct ieee80211_rx_status *rx_status, | |
1431 | int beacon) | |
1432 | { | |
1433 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1434 | struct ieee802_11_elems elems; | |
1435 | size_t baselen; | |
1436 | int channel, invalid = 0, clen; | |
1437 | struct ieee80211_sta_bss *bss; | |
1438 | struct sta_info *sta; | |
1439 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1440 | u64 timestamp; | |
1441 | ||
1442 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1443 | return; /* ignore ProbeResp to foreign address */ | |
1444 | ||
1445 | #if 0 | |
1446 | printk(KERN_DEBUG "%s: RX %s from " MAC_FMT " to " MAC_FMT "\n", | |
1447 | dev->name, beacon ? "Beacon" : "Probe Response", | |
1448 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da)); | |
1449 | #endif | |
1450 | ||
1451 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1452 | if (baselen > len) | |
1453 | return; | |
1454 | ||
1455 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1456 | ||
1457 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && | |
1458 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1459 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1460 | static unsigned long last_tsf_debug = 0; | |
1461 | u64 tsf; | |
1462 | if (local->ops->get_tsf) | |
1463 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1464 | else | |
1465 | tsf = -1LLU; | |
1466 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
1467 | printk(KERN_DEBUG "RX beacon SA=" MAC_FMT " BSSID=" | |
1468 | MAC_FMT " TSF=0x%llx BCN=0x%llx diff=%lld " | |
1469 | "@%lu\n", | |
1470 | MAC_ARG(mgmt->sa), MAC_ARG(mgmt->bssid), | |
1471 | (unsigned long long)tsf, | |
1472 | (unsigned long long)timestamp, | |
1473 | (unsigned long long)(tsf - timestamp), | |
1474 | jiffies); | |
1475 | last_tsf_debug = jiffies; | |
1476 | } | |
1477 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1478 | } | |
1479 | ||
1480 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1481 | &elems) == ParseFailed) | |
1482 | invalid = 1; | |
1483 | ||
1484 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && | |
1485 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && | |
1486 | (sta = sta_info_get(local, mgmt->sa))) { | |
1487 | struct ieee80211_hw_mode *mode; | |
1488 | struct ieee80211_rate *rates; | |
1489 | size_t num_rates; | |
1490 | u32 supp_rates, prev_rates; | |
1491 | int i, j; | |
1492 | ||
1493 | mode = local->sta_scanning ? | |
1494 | local->scan_hw_mode : local->oper_hw_mode; | |
1495 | rates = mode->rates; | |
1496 | num_rates = mode->num_rates; | |
1497 | ||
1498 | supp_rates = 0; | |
1499 | for (i = 0; i < elems.supp_rates_len + | |
1500 | elems.ext_supp_rates_len; i++) { | |
1501 | u8 rate = 0; | |
1502 | int own_rate; | |
1503 | if (i < elems.supp_rates_len) | |
1504 | rate = elems.supp_rates[i]; | |
1505 | else if (elems.ext_supp_rates) | |
1506 | rate = elems.ext_supp_rates | |
1507 | [i - elems.supp_rates_len]; | |
1508 | own_rate = 5 * (rate & 0x7f); | |
1509 | if (mode->mode == MODE_ATHEROS_TURBO) | |
1510 | own_rate *= 2; | |
1511 | for (j = 0; j < num_rates; j++) | |
1512 | if (rates[j].rate == own_rate) | |
1513 | supp_rates |= BIT(j); | |
1514 | } | |
1515 | ||
1516 | prev_rates = sta->supp_rates; | |
1517 | sta->supp_rates &= supp_rates; | |
1518 | if (sta->supp_rates == 0) { | |
1519 | /* No matching rates - this should not really happen. | |
1520 | * Make sure that at least one rate is marked | |
1521 | * supported to avoid issues with TX rate ctrl. */ | |
1522 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1523 | } | |
1524 | if (sta->supp_rates != prev_rates) { | |
1525 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
1526 | MAC_FMT " based on beacon info (0x%x & 0x%x -> " | |
1527 | "0x%x)\n", | |
1528 | dev->name, MAC_ARG(sta->addr), prev_rates, | |
1529 | supp_rates, sta->supp_rates); | |
1530 | } | |
1531 | sta_info_put(sta); | |
1532 | } | |
1533 | ||
1534 | if (!elems.ssid) | |
1535 | return; | |
1536 | ||
1537 | if (elems.ds_params && elems.ds_params_len == 1) | |
1538 | channel = elems.ds_params[0]; | |
1539 | else | |
1540 | channel = rx_status->channel; | |
1541 | ||
1542 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid); | |
1543 | if (!bss) { | |
1544 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid); | |
1545 | if (!bss) | |
1546 | return; | |
1547 | } else { | |
1548 | #if 0 | |
1549 | /* TODO: order by RSSI? */ | |
1550 | spin_lock_bh(&local->sta_bss_lock); | |
1551 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1552 | spin_unlock_bh(&local->sta_bss_lock); | |
1553 | #endif | |
1554 | } | |
1555 | ||
1556 | if (bss->probe_resp && beacon) { | |
1557 | /* Do not allow beacon to override data from Probe Response. */ | |
1558 | ieee80211_rx_bss_put(dev, bss); | |
1559 | return; | |
1560 | } | |
1561 | ||
5628221c DD |
1562 | /* save the ERP value so that it is available at association time */ |
1563 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1564 | bss->erp_value = elems.erp_info[0]; | |
1565 | bss->has_erp_value = 1; | |
1566 | } | |
1567 | ||
f0706e82 JB |
1568 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1569 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
1570 | if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { | |
1571 | memcpy(bss->ssid, elems.ssid, elems.ssid_len); | |
1572 | bss->ssid_len = elems.ssid_len; | |
1573 | } | |
1574 | ||
1575 | bss->supp_rates_len = 0; | |
1576 | if (elems.supp_rates) { | |
1577 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1578 | if (clen > elems.supp_rates_len) | |
1579 | clen = elems.supp_rates_len; | |
1580 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1581 | clen); | |
1582 | bss->supp_rates_len += clen; | |
1583 | } | |
1584 | if (elems.ext_supp_rates) { | |
1585 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1586 | if (clen > elems.ext_supp_rates_len) | |
1587 | clen = elems.ext_supp_rates_len; | |
1588 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1589 | elems.ext_supp_rates, clen); | |
1590 | bss->supp_rates_len += clen; | |
1591 | } | |
1592 | ||
1593 | if (elems.wpa && | |
1594 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1595 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1596 | kfree(bss->wpa_ie); | |
1597 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1598 | if (bss->wpa_ie) { | |
1599 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1600 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1601 | } else | |
1602 | bss->wpa_ie_len = 0; | |
1603 | } else if (!elems.wpa && bss->wpa_ie) { | |
1604 | kfree(bss->wpa_ie); | |
1605 | bss->wpa_ie = NULL; | |
1606 | bss->wpa_ie_len = 0; | |
1607 | } | |
1608 | ||
1609 | if (elems.rsn && | |
1610 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
1611 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
1612 | kfree(bss->rsn_ie); | |
1613 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
1614 | if (bss->rsn_ie) { | |
1615 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
1616 | bss->rsn_ie_len = elems.rsn_len + 2; | |
1617 | } else | |
1618 | bss->rsn_ie_len = 0; | |
1619 | } else if (!elems.rsn && bss->rsn_ie) { | |
1620 | kfree(bss->rsn_ie); | |
1621 | bss->rsn_ie = NULL; | |
1622 | bss->rsn_ie_len = 0; | |
1623 | } | |
1624 | ||
1625 | if (elems.wmm_param && | |
1626 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
1627 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
1628 | kfree(bss->wmm_ie); | |
1629 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
1630 | if (bss->wmm_ie) { | |
1631 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
1632 | elems.wmm_param_len + 2); | |
1633 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
1634 | } else | |
1635 | bss->wmm_ie_len = 0; | |
1636 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
1637 | kfree(bss->wmm_ie); | |
1638 | bss->wmm_ie = NULL; | |
1639 | bss->wmm_ie_len = 0; | |
1640 | } | |
1641 | ||
1642 | ||
1643 | bss->hw_mode = rx_status->phymode; | |
1644 | bss->channel = channel; | |
1645 | bss->freq = rx_status->freq; | |
1646 | if (channel != rx_status->channel && | |
1647 | (bss->hw_mode == MODE_IEEE80211G || | |
1648 | bss->hw_mode == MODE_IEEE80211B) && | |
1649 | channel >= 1 && channel <= 14) { | |
1650 | static const int freq_list[] = { | |
1651 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
1652 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
1653 | }; | |
1654 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
1655 | * channels, so map the channel into frequency. */ | |
1656 | bss->freq = freq_list[channel - 1]; | |
1657 | } | |
1658 | bss->timestamp = timestamp; | |
1659 | bss->last_update = jiffies; | |
1660 | bss->rssi = rx_status->ssi; | |
1661 | bss->signal = rx_status->signal; | |
1662 | bss->noise = rx_status->noise; | |
1663 | if (!beacon) | |
1664 | bss->probe_resp++; | |
1665 | ieee80211_rx_bss_put(dev, bss); | |
1666 | } | |
1667 | ||
1668 | ||
1669 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
1670 | struct ieee80211_mgmt *mgmt, | |
1671 | size_t len, | |
1672 | struct ieee80211_rx_status *rx_status) | |
1673 | { | |
1674 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
1675 | } | |
1676 | ||
1677 | ||
1678 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
1679 | struct ieee80211_mgmt *mgmt, | |
1680 | size_t len, | |
1681 | struct ieee80211_rx_status *rx_status) | |
1682 | { | |
f0706e82 JB |
1683 | struct ieee80211_sub_if_data *sdata; |
1684 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
1685 | size_t baselen; |
1686 | struct ieee802_11_elems elems; | |
1687 | ||
1688 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
1689 | ||
1690 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1691 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
1692 | return; | |
1693 | ifsta = &sdata->u.sta; | |
1694 | ||
1695 | if (!ifsta->associated || | |
1696 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) | |
1697 | return; | |
1698 | ||
1699 | /* Process beacon from the current BSS */ | |
1700 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1701 | if (baselen > len) | |
1702 | return; | |
1703 | ||
1704 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1705 | &elems) == ParseFailed) | |
1706 | return; | |
1707 | ||
5628221c DD |
1708 | if (elems.erp_info && elems.erp_info_len >= 1) |
1709 | ieee80211_handle_erp_ie(dev, elems.erp_info[0]); | |
f0706e82 JB |
1710 | |
1711 | if (elems.wmm_param && ifsta->wmm_enabled) { | |
1712 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1713 | elems.wmm_param_len); | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | ||
1718 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
1719 | struct ieee80211_if_sta *ifsta, | |
1720 | struct ieee80211_mgmt *mgmt, | |
1721 | size_t len, | |
1722 | struct ieee80211_rx_status *rx_status) | |
1723 | { | |
1724 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1725 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1726 | int tx_last_beacon; | |
1727 | struct sk_buff *skb; | |
1728 | struct ieee80211_mgmt *resp; | |
1729 | u8 *pos, *end; | |
1730 | ||
1731 | if (sdata->type != IEEE80211_IF_TYPE_IBSS || | |
1732 | ifsta->state != IEEE80211_IBSS_JOINED || | |
1733 | len < 24 + 2 || !ifsta->probe_resp) | |
1734 | return; | |
1735 | ||
1736 | if (local->ops->tx_last_beacon) | |
1737 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1738 | else | |
1739 | tx_last_beacon = 1; | |
1740 | ||
1741 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1742 | printk(KERN_DEBUG "%s: RX ProbeReq SA=" MAC_FMT " DA=" MAC_FMT " BSSID=" | |
1743 | MAC_FMT " (tx_last_beacon=%d)\n", | |
1744 | dev->name, MAC_ARG(mgmt->sa), MAC_ARG(mgmt->da), | |
1745 | MAC_ARG(mgmt->bssid), tx_last_beacon); | |
1746 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1747 | ||
1748 | if (!tx_last_beacon) | |
1749 | return; | |
1750 | ||
1751 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1752 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1753 | return; | |
1754 | ||
1755 | end = ((u8 *) mgmt) + len; | |
1756 | pos = mgmt->u.probe_req.variable; | |
1757 | if (pos[0] != WLAN_EID_SSID || | |
1758 | pos + 2 + pos[1] > end) { | |
1759 | if (net_ratelimit()) { | |
1760 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
1761 | "from " MAC_FMT "\n", | |
1762 | dev->name, MAC_ARG(mgmt->sa)); | |
1763 | } | |
1764 | return; | |
1765 | } | |
1766 | if (pos[1] != 0 && | |
1767 | (pos[1] != ifsta->ssid_len || | |
1768 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1769 | /* Ignore ProbeReq for foreign SSID */ | |
1770 | return; | |
1771 | } | |
1772 | ||
1773 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1774 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1775 | if (!skb) |
1776 | return; | |
1777 | ||
1778 | resp = (struct ieee80211_mgmt *) skb->data; | |
1779 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1780 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1781 | printk(KERN_DEBUG "%s: Sending ProbeResp to " MAC_FMT "\n", | |
1782 | dev->name, MAC_ARG(resp->da)); | |
1783 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1784 | ieee80211_sta_tx(dev, skb, 0); | |
1785 | } | |
1786 | ||
1787 | ||
1788 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
1789 | struct ieee80211_rx_status *rx_status) | |
1790 | { | |
1791 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1792 | struct ieee80211_sub_if_data *sdata; | |
1793 | struct ieee80211_if_sta *ifsta; | |
1794 | struct ieee80211_mgmt *mgmt; | |
1795 | u16 fc; | |
1796 | ||
1797 | if (skb->len < 24) | |
1798 | goto fail; | |
1799 | ||
1800 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1801 | ifsta = &sdata->u.sta; | |
1802 | ||
1803 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1804 | fc = le16_to_cpu(mgmt->frame_control); | |
1805 | ||
1806 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1807 | case IEEE80211_STYPE_PROBE_REQ: | |
1808 | case IEEE80211_STYPE_PROBE_RESP: | |
1809 | case IEEE80211_STYPE_BEACON: | |
1810 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1811 | case IEEE80211_STYPE_AUTH: | |
1812 | case IEEE80211_STYPE_ASSOC_RESP: | |
1813 | case IEEE80211_STYPE_REASSOC_RESP: | |
1814 | case IEEE80211_STYPE_DEAUTH: | |
1815 | case IEEE80211_STYPE_DISASSOC: | |
1816 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1817 | queue_work(local->hw.workqueue, &ifsta->work); | |
1818 | return; | |
1819 | default: | |
1820 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
1821 | "stype=%d\n", dev->name, | |
1822 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
1823 | break; | |
1824 | } | |
1825 | ||
1826 | fail: | |
1827 | kfree_skb(skb); | |
1828 | } | |
1829 | ||
1830 | ||
1831 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
1832 | struct sk_buff *skb) | |
1833 | { | |
1834 | struct ieee80211_rx_status *rx_status; | |
1835 | struct ieee80211_sub_if_data *sdata; | |
1836 | struct ieee80211_if_sta *ifsta; | |
1837 | struct ieee80211_mgmt *mgmt; | |
1838 | u16 fc; | |
1839 | ||
1840 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1841 | ifsta = &sdata->u.sta; | |
1842 | ||
1843 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1844 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1845 | fc = le16_to_cpu(mgmt->frame_control); | |
1846 | ||
1847 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1848 | case IEEE80211_STYPE_PROBE_REQ: | |
1849 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
1850 | rx_status); | |
1851 | break; | |
1852 | case IEEE80211_STYPE_PROBE_RESP: | |
1853 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
1854 | break; | |
1855 | case IEEE80211_STYPE_BEACON: | |
1856 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
1857 | break; | |
1858 | case IEEE80211_STYPE_AUTH: | |
1859 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
1860 | break; | |
1861 | case IEEE80211_STYPE_ASSOC_RESP: | |
1862 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); | |
1863 | break; | |
1864 | case IEEE80211_STYPE_REASSOC_RESP: | |
1865 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); | |
1866 | break; | |
1867 | case IEEE80211_STYPE_DEAUTH: | |
1868 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
1869 | break; | |
1870 | case IEEE80211_STYPE_DISASSOC: | |
1871 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
1872 | break; | |
1873 | } | |
1874 | ||
1875 | kfree_skb(skb); | |
1876 | } | |
1877 | ||
1878 | ||
1879 | void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
1880 | struct ieee80211_rx_status *rx_status) | |
1881 | { | |
1882 | struct ieee80211_mgmt *mgmt; | |
1883 | u16 fc; | |
1884 | ||
1885 | if (skb->len < 24) { | |
1886 | dev_kfree_skb(skb); | |
1887 | return; | |
1888 | } | |
1889 | ||
1890 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1891 | fc = le16_to_cpu(mgmt->frame_control); | |
1892 | ||
1893 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { | |
1894 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
1895 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
1896 | skb->len, rx_status); | |
1897 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { | |
1898 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
1899 | rx_status); | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | dev_kfree_skb(skb); | |
1904 | } | |
1905 | ||
1906 | ||
1907 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
1908 | { | |
1909 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1910 | int active = 0; | |
1911 | struct sta_info *sta; | |
1912 | ||
be8755e1 | 1913 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
1914 | list_for_each_entry(sta, &local->sta_list, list) { |
1915 | if (sta->dev == dev && | |
1916 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
1917 | jiffies)) { | |
1918 | active++; | |
1919 | break; | |
1920 | } | |
1921 | } | |
be8755e1 | 1922 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
1923 | |
1924 | return active; | |
1925 | } | |
1926 | ||
1927 | ||
1928 | static void ieee80211_sta_expire(struct net_device *dev) | |
1929 | { | |
1930 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1931 | struct sta_info *sta, *tmp; | |
be8755e1 | 1932 | LIST_HEAD(tmp_list); |
f0706e82 | 1933 | |
be8755e1 | 1934 | write_lock_bh(&local->sta_lock); |
f0706e82 JB |
1935 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
1936 | if (time_after(jiffies, sta->last_rx + | |
1937 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
1938 | printk(KERN_DEBUG "%s: expiring inactive STA " MAC_FMT | |
1939 | "\n", dev->name, MAC_ARG(sta->addr)); | |
be8755e1 MW |
1940 | __sta_info_get(sta); |
1941 | sta_info_remove(sta); | |
1942 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 1943 | } |
be8755e1 MW |
1944 | write_unlock_bh(&local->sta_lock); |
1945 | ||
1946 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
1947 | sta_info_free(sta); | |
1948 | sta_info_put(sta); | |
1949 | } | |
f0706e82 JB |
1950 | } |
1951 | ||
1952 | ||
1953 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
1954 | struct ieee80211_if_sta *ifsta) | |
1955 | { | |
1956 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1957 | ||
1958 | ieee80211_sta_expire(dev); | |
1959 | if (ieee80211_sta_active_ibss(dev)) | |
1960 | return; | |
1961 | ||
1962 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
1963 | "IBSS networks with same SSID (merge)\n", dev->name); | |
1964 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
1965 | } | |
1966 | ||
1967 | ||
1968 | void ieee80211_sta_timer(unsigned long data) | |
1969 | { | |
1970 | struct ieee80211_sub_if_data *sdata = | |
1971 | (struct ieee80211_sub_if_data *) data; | |
1972 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1973 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
1974 | ||
1975 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1976 | queue_work(local->hw.workqueue, &ifsta->work); | |
1977 | } | |
1978 | ||
1979 | ||
1980 | void ieee80211_sta_work(struct work_struct *work) | |
1981 | { | |
1982 | struct ieee80211_sub_if_data *sdata = | |
1983 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
1984 | struct net_device *dev = sdata->dev; | |
1985 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1986 | struct ieee80211_if_sta *ifsta; | |
1987 | struct sk_buff *skb; | |
1988 | ||
1989 | if (!netif_running(dev)) | |
1990 | return; | |
1991 | ||
1992 | if (local->sta_scanning) | |
1993 | return; | |
1994 | ||
1995 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
1996 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
1997 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " | |
1998 | "(type=%d)\n", dev->name, sdata->type); | |
1999 | return; | |
2000 | } | |
2001 | ifsta = &sdata->u.sta; | |
2002 | ||
2003 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
2004 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
2005 | ||
2006 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
2007 | ifsta->state != IEEE80211_ASSOCIATE && | |
2008 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
2009 | ieee80211_sta_start_scan(dev, NULL, 0); | |
2010 | return; | |
2011 | } | |
2012 | ||
2013 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
2014 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
2015 | return; | |
2016 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2017 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2018 | return; | |
2019 | ||
2020 | switch (ifsta->state) { | |
2021 | case IEEE80211_DISABLED: | |
2022 | break; | |
2023 | case IEEE80211_AUTHENTICATE: | |
2024 | ieee80211_authenticate(dev, ifsta); | |
2025 | break; | |
2026 | case IEEE80211_ASSOCIATE: | |
2027 | ieee80211_associate(dev, ifsta); | |
2028 | break; | |
2029 | case IEEE80211_ASSOCIATED: | |
2030 | ieee80211_associated(dev, ifsta); | |
2031 | break; | |
2032 | case IEEE80211_IBSS_SEARCH: | |
2033 | ieee80211_sta_find_ibss(dev, ifsta); | |
2034 | break; | |
2035 | case IEEE80211_IBSS_JOINED: | |
2036 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2037 | break; | |
2038 | default: | |
2039 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2040 | ifsta->state); | |
2041 | break; | |
2042 | } | |
2043 | ||
2044 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2045 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2046 | "mixed-cell disabled - disassociate\n", dev->name); | |
2047 | ||
2048 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2049 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | ||
2054 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2055 | struct ieee80211_if_sta *ifsta) | |
2056 | { | |
2057 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2058 | ||
2059 | if (local->ops->reset_tsf) { | |
2060 | /* Reset own TSF to allow time synchronization work. */ | |
2061 | local->ops->reset_tsf(local_to_hw(local)); | |
2062 | } | |
2063 | ||
2064 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2065 | ||
2066 | ||
2067 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2068 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2069 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2070 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2071 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2072 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2073 | else | |
2074 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2075 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2076 | ifsta->auth_alg); | |
2077 | ifsta->auth_transaction = -1; | |
2078 | ifsta->associated = ifsta->auth_tries = ifsta->assoc_tries = 0; | |
2079 | netif_carrier_off(dev); | |
2080 | } | |
2081 | ||
2082 | ||
2083 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2084 | struct ieee80211_if_sta *ifsta) | |
2085 | { | |
2086 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2087 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2088 | ||
2089 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2090 | return; | |
2091 | ||
2092 | if ((ifsta->bssid_set || ifsta->auto_bssid_sel) && | |
2093 | (ifsta->ssid_set || ifsta->auto_ssid_sel)) { | |
2094 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2095 | queue_work(local->hw.workqueue, &ifsta->work); | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2100 | const char *ssid, int ssid_len) | |
2101 | { | |
2102 | int tmp, hidden_ssid; | |
2103 | ||
2104 | if (!memcmp(ifsta->ssid, ssid, ssid_len)) | |
2105 | return 1; | |
2106 | ||
2107 | if (ifsta->auto_bssid_sel) | |
2108 | return 0; | |
2109 | ||
2110 | hidden_ssid = 1; | |
2111 | tmp = ssid_len; | |
2112 | while (tmp--) { | |
2113 | if (ssid[tmp] != '\0') { | |
2114 | hidden_ssid = 0; | |
2115 | break; | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2120 | return 1; | |
2121 | ||
2122 | if (ssid_len == 1 && ssid[0] == ' ') | |
2123 | return 1; | |
2124 | ||
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2129 | struct ieee80211_if_sta *ifsta) | |
2130 | { | |
2131 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2132 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2133 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2134 | int top_rssi = 0, freq; | |
2135 | ||
f0706e82 JB |
2136 | if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel && |
2137 | !ifsta->auto_ssid_sel) { | |
2138 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2139 | ieee80211_sta_reset_auth(dev, ifsta); |
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | spin_lock_bh(&local->sta_bss_lock); | |
2144 | freq = local->oper_channel->freq; | |
2145 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2146 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2147 | continue; | |
2148 | ||
2149 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2150 | !!sdata->default_key) | |
2151 | continue; | |
2152 | ||
2153 | if (!ifsta->auto_channel_sel && bss->freq != freq) | |
2154 | continue; | |
2155 | ||
2156 | if (!ifsta->auto_bssid_sel && | |
2157 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) | |
2158 | continue; | |
2159 | ||
2160 | if (!ifsta->auto_ssid_sel && | |
2161 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) | |
2162 | continue; | |
2163 | ||
2164 | if (!selected || top_rssi < bss->rssi) { | |
2165 | selected = bss; | |
2166 | top_rssi = bss->rssi; | |
2167 | } | |
2168 | } | |
2169 | if (selected) | |
2170 | atomic_inc(&selected->users); | |
2171 | spin_unlock_bh(&local->sta_bss_lock); | |
2172 | ||
2173 | if (selected) { | |
2174 | ieee80211_set_channel(local, -1, selected->freq); | |
2175 | if (!ifsta->ssid_set) | |
2176 | ieee80211_sta_set_ssid(dev, selected->ssid, | |
2177 | selected->ssid_len); | |
2178 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2179 | ieee80211_rx_bss_put(dev, selected); | |
2180 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2181 | ieee80211_sta_reset_auth(dev, ifsta); |
2182 | return 0; | |
2183 | } else { | |
2184 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
b9bf1e60 JL |
2185 | if (ifsta->auto_ssid_sel) |
2186 | ieee80211_sta_start_scan(dev, NULL, 0); | |
2187 | else | |
2188 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
2189 | ifsta->ssid_len); | |
f0706e82 JB |
2190 | ifsta->state = IEEE80211_AUTHENTICATE; |
2191 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2192 | } else | |
2193 | ifsta->state = IEEE80211_DISABLED; | |
2194 | } | |
f0706e82 JB |
2195 | return -1; |
2196 | } | |
2197 | ||
2198 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2199 | struct ieee80211_if_sta *ifsta, | |
2200 | struct ieee80211_sta_bss *bss) | |
2201 | { | |
2202 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2203 | int res, rates, i, j; | |
2204 | struct sk_buff *skb; | |
2205 | struct ieee80211_mgmt *mgmt; | |
2206 | struct ieee80211_tx_control control; | |
2207 | struct ieee80211_rate *rate; | |
2208 | struct ieee80211_hw_mode *mode; | |
2209 | struct rate_control_extra extra; | |
2210 | u8 *pos; | |
2211 | struct ieee80211_sub_if_data *sdata; | |
2212 | ||
2213 | /* Remove possible STA entries from other IBSS networks. */ | |
2214 | sta_info_flush(local, NULL); | |
2215 | ||
2216 | if (local->ops->reset_tsf) { | |
2217 | /* Reset own TSF to allow time synchronization work. */ | |
2218 | local->ops->reset_tsf(local_to_hw(local)); | |
2219 | } | |
2220 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2221 | res = ieee80211_if_config(dev); | |
2222 | if (res) | |
2223 | return res; | |
2224 | ||
2225 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2226 | ||
2227 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2228 | sdata->drop_unencrypted = bss->capability & | |
2229 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2230 | ||
2231 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2232 | ||
2233 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2234 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2235 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2236 | local->hw.conf.freq); | |
2237 | return -1; | |
2238 | } | |
2239 | ||
2240 | /* Set beacon template based on scan results */ | |
2241 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2242 | do { | |
2243 | if (!skb) | |
2244 | break; | |
2245 | ||
2246 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2247 | ||
2248 | mgmt = (struct ieee80211_mgmt *) | |
2249 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2250 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2251 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2252 | IEEE80211_STYPE_BEACON); | |
2253 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2254 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2255 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2256 | mgmt->u.beacon.beacon_int = | |
2257 | cpu_to_le16(local->hw.conf.beacon_int); | |
2258 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2259 | ||
2260 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2261 | *pos++ = WLAN_EID_SSID; | |
2262 | *pos++ = ifsta->ssid_len; | |
2263 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2264 | ||
2265 | rates = bss->supp_rates_len; | |
2266 | if (rates > 8) | |
2267 | rates = 8; | |
2268 | pos = skb_put(skb, 2 + rates); | |
2269 | *pos++ = WLAN_EID_SUPP_RATES; | |
2270 | *pos++ = rates; | |
2271 | memcpy(pos, bss->supp_rates, rates); | |
2272 | ||
2273 | pos = skb_put(skb, 2 + 1); | |
2274 | *pos++ = WLAN_EID_DS_PARAMS; | |
2275 | *pos++ = 1; | |
2276 | *pos++ = bss->channel; | |
2277 | ||
2278 | pos = skb_put(skb, 2 + 2); | |
2279 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2280 | *pos++ = 2; | |
2281 | /* FIX: set ATIM window based on scan results */ | |
2282 | *pos++ = 0; | |
2283 | *pos++ = 0; | |
2284 | ||
2285 | if (bss->supp_rates_len > 8) { | |
2286 | rates = bss->supp_rates_len - 8; | |
2287 | pos = skb_put(skb, 2 + rates); | |
2288 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2289 | *pos++ = rates; | |
2290 | memcpy(pos, &bss->supp_rates[8], rates); | |
2291 | } | |
2292 | ||
2293 | memset(&control, 0, sizeof(control)); | |
2294 | memset(&extra, 0, sizeof(extra)); | |
2295 | extra.mode = local->oper_hw_mode; | |
2296 | rate = rate_control_get_rate(local, dev, skb, &extra); | |
2297 | if (!rate) { | |
2298 | printk(KERN_DEBUG "%s: Failed to determine TX rate " | |
2299 | "for IBSS beacon\n", dev->name); | |
2300 | break; | |
2301 | } | |
7e9ed188 | 2302 | control.tx_rate = (sdata->short_preamble && |
f0706e82 JB |
2303 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? |
2304 | rate->val2 : rate->val; | |
2305 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2306 | control.power_level = local->hw.conf.power_level; | |
2307 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2308 | control.retry_limit = 1; | |
2309 | ||
2310 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2311 | if (ifsta->probe_resp) { | |
2312 | mgmt = (struct ieee80211_mgmt *) | |
2313 | ifsta->probe_resp->data; | |
2314 | mgmt->frame_control = | |
2315 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2316 | IEEE80211_STYPE_PROBE_RESP); | |
2317 | } else { | |
2318 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2319 | "template for IBSS\n", dev->name); | |
2320 | } | |
2321 | ||
2322 | if (local->ops->beacon_update && | |
2323 | local->ops->beacon_update(local_to_hw(local), | |
2324 | skb, &control) == 0) { | |
2325 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2326 | "template based on scan results\n", dev->name); | |
2327 | skb = NULL; | |
2328 | } | |
2329 | ||
2330 | rates = 0; | |
2331 | mode = local->oper_hw_mode; | |
2332 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2333 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
2334 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2335 | bitrate *= 2; | |
2336 | for (j = 0; j < mode->num_rates; j++) | |
2337 | if (mode->rates[j].rate == bitrate) | |
2338 | rates |= BIT(j); | |
2339 | } | |
2340 | ifsta->supp_rates_bits = rates; | |
2341 | } while (0); | |
2342 | ||
2343 | if (skb) { | |
2344 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2345 | "template\n", dev->name); | |
2346 | dev_kfree_skb(skb); | |
2347 | } | |
2348 | ||
2349 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2350 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2351 | ||
2352 | ieee80211_rx_bss_put(dev, bss); | |
2353 | ||
2354 | return res; | |
2355 | } | |
2356 | ||
2357 | ||
2358 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2359 | struct ieee80211_if_sta *ifsta) | |
2360 | { | |
2361 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2362 | struct ieee80211_sta_bss *bss; | |
2363 | struct ieee80211_sub_if_data *sdata; | |
2364 | struct ieee80211_hw_mode *mode; | |
2365 | u8 bssid[ETH_ALEN], *pos; | |
2366 | int i; | |
2367 | ||
2368 | #if 0 | |
2369 | /* Easier testing, use fixed BSSID. */ | |
2370 | memset(bssid, 0xfe, ETH_ALEN); | |
2371 | #else | |
2372 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2373 | * own MAC address to make sure that devices that do not have proper | |
2374 | * random number generator get different BSSID. */ | |
2375 | get_random_bytes(bssid, ETH_ALEN); | |
2376 | for (i = 0; i < ETH_ALEN; i++) | |
2377 | bssid[i] ^= dev->dev_addr[i]; | |
2378 | bssid[0] &= ~0x01; | |
2379 | bssid[0] |= 0x02; | |
2380 | #endif | |
2381 | ||
2382 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID " MAC_FMT "\n", | |
2383 | dev->name, MAC_ARG(bssid)); | |
2384 | ||
2385 | bss = ieee80211_rx_bss_add(dev, bssid); | |
2386 | if (!bss) | |
2387 | return -ENOMEM; | |
2388 | ||
2389 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2390 | mode = local->oper_hw_mode; | |
2391 | ||
2392 | if (local->hw.conf.beacon_int == 0) | |
2393 | local->hw.conf.beacon_int = 100; | |
2394 | bss->beacon_int = local->hw.conf.beacon_int; | |
2395 | bss->hw_mode = local->hw.conf.phymode; | |
2396 | bss->channel = local->hw.conf.channel; | |
2397 | bss->freq = local->hw.conf.freq; | |
2398 | bss->last_update = jiffies; | |
2399 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2400 | if (sdata->default_key) { | |
2401 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2402 | } else | |
2403 | sdata->drop_unencrypted = 0; | |
2404 | bss->supp_rates_len = mode->num_rates; | |
2405 | pos = bss->supp_rates; | |
2406 | for (i = 0; i < mode->num_rates; i++) { | |
2407 | int rate = mode->rates[i].rate; | |
2408 | if (mode->mode == MODE_ATHEROS_TURBO) | |
2409 | rate /= 2; | |
2410 | *pos++ = (u8) (rate / 5); | |
2411 | } | |
2412 | ||
2413 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2414 | } | |
2415 | ||
2416 | ||
2417 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2418 | struct ieee80211_if_sta *ifsta) | |
2419 | { | |
2420 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2421 | struct ieee80211_sta_bss *bss; | |
2422 | int found = 0; | |
2423 | u8 bssid[ETH_ALEN]; | |
2424 | int active_ibss; | |
2425 | ||
2426 | if (ifsta->ssid_len == 0) | |
2427 | return -EINVAL; | |
2428 | ||
2429 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2430 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2431 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2432 | dev->name, active_ibss); | |
2433 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2434 | spin_lock_bh(&local->sta_bss_lock); | |
2435 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2436 | if (ifsta->ssid_len != bss->ssid_len || | |
2437 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2438 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2439 | continue; | |
2440 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2441 | printk(KERN_DEBUG " bssid=" MAC_FMT " found\n", | |
2442 | MAC_ARG(bss->bssid)); | |
2443 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2444 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2445 | found = 1; | |
2446 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2447 | break; | |
2448 | } | |
2449 | spin_unlock_bh(&local->sta_bss_lock); | |
2450 | ||
2451 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2452 | printk(KERN_DEBUG " sta_find_ibss: selected " MAC_FMT " current " | |
2453 | MAC_FMT "\n", MAC_ARG(bssid), MAC_ARG(ifsta->bssid)); | |
2454 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2455 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
2456 | (bss = ieee80211_rx_bss_get(dev, bssid))) { | |
2457 | printk(KERN_DEBUG "%s: Selected IBSS BSSID " MAC_FMT | |
2458 | " based on configured SSID\n", | |
2459 | dev->name, MAC_ARG(bssid)); | |
2460 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2461 | } | |
2462 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2463 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2464 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2465 | ||
2466 | /* Selected IBSS not found in current scan results - try to scan */ | |
2467 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2468 | !ieee80211_sta_active_ibss(dev)) { | |
2469 | mod_timer(&ifsta->timer, jiffies + | |
2470 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2471 | } else if (time_after(jiffies, local->last_scan_completed + | |
2472 | IEEE80211_SCAN_INTERVAL)) { | |
2473 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2474 | "join\n", dev->name); | |
2475 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2476 | ifsta->ssid_len); | |
2477 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2478 | int interval = IEEE80211_SCAN_INTERVAL; | |
2479 | ||
2480 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2481 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
2482 | if (ifsta->create_ibss && | |
2483 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) | |
2484 | return ieee80211_sta_create_ibss(dev, ifsta); | |
2485 | if (ifsta->create_ibss) { | |
2486 | printk(KERN_DEBUG "%s: IBSS not allowed on the" | |
2487 | " configured channel %d (%d MHz)\n", | |
2488 | dev->name, local->hw.conf.channel, | |
2489 | local->hw.conf.freq); | |
2490 | } | |
2491 | ||
2492 | /* No IBSS found - decrease scan interval and continue | |
2493 | * scanning. */ | |
2494 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2495 | } | |
2496 | ||
2497 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2498 | mod_timer(&ifsta->timer, jiffies + interval); | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | return 0; | |
2503 | } | |
2504 | ||
2505 | ||
2506 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2507 | { | |
2508 | struct ieee80211_sub_if_data *sdata; | |
2509 | struct ieee80211_if_sta *ifsta; | |
2510 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2511 | ||
2512 | if (len > IEEE80211_MAX_SSID_LEN) | |
2513 | return -EINVAL; | |
2514 | ||
2515 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
2516 | * not defined. */ | |
2517 | if (local->ops->conf_tx) { | |
2518 | struct ieee80211_tx_queue_params qparam; | |
2519 | int i; | |
2520 | ||
2521 | memset(&qparam, 0, sizeof(qparam)); | |
2522 | /* TODO: are these ok defaults for all hw_modes? */ | |
2523 | qparam.aifs = 2; | |
2524 | qparam.cw_min = | |
2525 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
2526 | qparam.cw_max = 1023; | |
2527 | qparam.burst_time = 0; | |
2528 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
2529 | { | |
2530 | local->ops->conf_tx(local_to_hw(local), | |
2531 | i + IEEE80211_TX_QUEUE_DATA0, | |
2532 | &qparam); | |
2533 | } | |
2534 | /* IBSS uses different parameters for Beacon sending */ | |
2535 | qparam.cw_min++; | |
2536 | qparam.cw_min *= 2; | |
2537 | qparam.cw_min--; | |
2538 | local->ops->conf_tx(local_to_hw(local), | |
2539 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
2540 | } | |
2541 | ||
2542 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2543 | ifsta = &sdata->u.sta; | |
2544 | ||
2545 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
2546 | ifsta->prev_bssid_set = 0; | |
2547 | memcpy(ifsta->ssid, ssid, len); | |
2548 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
2549 | ifsta->ssid_len = len; | |
2550 | ||
2551 | ifsta->ssid_set = len ? 1 : 0; | |
2552 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && !ifsta->bssid_set) { | |
2553 | ifsta->ibss_join_req = jiffies; | |
2554 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2555 | return ieee80211_sta_find_ibss(dev, ifsta); | |
2556 | } | |
2557 | return 0; | |
2558 | } | |
2559 | ||
2560 | ||
2561 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
2562 | { | |
2563 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2564 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2565 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2566 | *len = ifsta->ssid_len; | |
2567 | return 0; | |
2568 | } | |
2569 | ||
2570 | ||
2571 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
2572 | { | |
2573 | struct ieee80211_sub_if_data *sdata; | |
2574 | struct ieee80211_if_sta *ifsta; | |
2575 | int res; | |
2576 | ||
2577 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2578 | ifsta = &sdata->u.sta; | |
2579 | ||
2580 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2581 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2582 | res = ieee80211_if_config(dev); | |
2583 | if (res) { | |
2584 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2585 | "the low-level driver\n", dev->name); | |
2586 | return res; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | if (!is_valid_ether_addr(bssid)) | |
2591 | ifsta->bssid_set = 0; | |
2592 | else | |
2593 | ifsta->bssid_set = 1; | |
2594 | return 0; | |
2595 | } | |
2596 | ||
2597 | ||
2598 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2599 | struct ieee80211_sub_if_data *sdata, | |
2600 | int powersave) | |
2601 | { | |
2602 | struct sk_buff *skb; | |
2603 | struct ieee80211_hdr *nullfunc; | |
2604 | u16 fc; | |
2605 | ||
2606 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2607 | if (!skb) { | |
2608 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2609 | "frame\n", sdata->dev->name); | |
2610 | return; | |
2611 | } | |
2612 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2613 | ||
2614 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2615 | memset(nullfunc, 0, 24); | |
2616 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2617 | IEEE80211_FCTL_TODS; | |
2618 | if (powersave) | |
2619 | fc |= IEEE80211_FCTL_PM; | |
2620 | nullfunc->frame_control = cpu_to_le16(fc); | |
2621 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
2622 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2623 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
2624 | ||
2625 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
2626 | } | |
2627 | ||
2628 | ||
2629 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
2630 | { | |
2631 | struct ieee80211_local *local = hw_to_local(hw); | |
2632 | struct net_device *dev = local->scan_dev; | |
2633 | struct ieee80211_sub_if_data *sdata; | |
2634 | union iwreq_data wrqu; | |
2635 | ||
2636 | local->last_scan_completed = jiffies; | |
2637 | wmb(); | |
2638 | local->sta_scanning = 0; | |
2639 | ||
2640 | if (ieee80211_hw_config(local)) | |
2641 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2642 | "channel after scan\n", dev->name); | |
2643 | ||
2644 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2645 | ieee80211_if_config(dev)) | |
2646 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2647 | "BSSID after scan\n", dev->name); | |
2648 | ||
2649 | memset(&wrqu, 0, sizeof(wrqu)); | |
2650 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
2651 | ||
2652 | read_lock(&local->sub_if_lock); | |
2653 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2654 | |
2655 | /* No need to wake the master device. */ | |
2656 | if (sdata->dev == local->mdev) | |
2657 | continue; | |
2658 | ||
f0706e82 JB |
2659 | if (sdata->type == IEEE80211_IF_TYPE_STA) { |
2660 | if (sdata->u.sta.associated) | |
2661 | ieee80211_send_nullfunc(local, sdata, 0); | |
2662 | ieee80211_sta_timer((unsigned long)sdata); | |
2663 | } | |
14042cbe | 2664 | |
f0706e82 JB |
2665 | netif_wake_queue(sdata->dev); |
2666 | } | |
2667 | read_unlock(&local->sub_if_lock); | |
2668 | ||
2669 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2670 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2671 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2672 | if (!ifsta->bssid_set || | |
2673 | (!ifsta->state == IEEE80211_IBSS_JOINED && | |
2674 | !ieee80211_sta_active_ibss(dev))) | |
2675 | ieee80211_sta_find_ibss(dev, ifsta); | |
2676 | } | |
2677 | } | |
2678 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
2679 | ||
2680 | void ieee80211_sta_scan_work(struct work_struct *work) | |
2681 | { | |
2682 | struct ieee80211_local *local = | |
2683 | container_of(work, struct ieee80211_local, scan_work.work); | |
2684 | struct net_device *dev = local->scan_dev; | |
2685 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2686 | struct ieee80211_hw_mode *mode; | |
2687 | struct ieee80211_channel *chan; | |
2688 | int skip; | |
2689 | unsigned long next_delay = 0; | |
2690 | ||
2691 | if (!local->sta_scanning) | |
2692 | return; | |
2693 | ||
2694 | switch (local->scan_state) { | |
2695 | case SCAN_SET_CHANNEL: | |
2696 | mode = local->scan_hw_mode; | |
2697 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
2698 | local->scan_channel_idx >= mode->num_channels) { | |
2699 | ieee80211_scan_completed(local_to_hw(local)); | |
2700 | return; | |
2701 | } | |
2702 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
2703 | chan = &mode->channels[local->scan_channel_idx]; | |
2704 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
2705 | (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
2706 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || | |
2707 | (local->hw_modes & local->enabled_modes & | |
2708 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
2709 | skip = 1; | |
2710 | ||
2711 | if (!skip) { | |
2712 | #if 0 | |
2713 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
2714 | dev->name, chan->chan, chan->freq); | |
2715 | #endif | |
2716 | ||
2717 | local->scan_channel = chan; | |
2718 | if (ieee80211_hw_config(local)) { | |
2719 | printk(KERN_DEBUG "%s: failed to set channel " | |
2720 | "%d (%d MHz) for scan\n", dev->name, | |
2721 | chan->chan, chan->freq); | |
2722 | skip = 1; | |
2723 | } | |
2724 | } | |
2725 | ||
2726 | local->scan_channel_idx++; | |
2727 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
2728 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
2729 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
2730 | struct ieee80211_hw_mode, | |
2731 | list); | |
2732 | local->scan_channel_idx = 0; | |
2733 | } | |
2734 | } | |
2735 | ||
2736 | if (skip) | |
2737 | break; | |
2738 | ||
2739 | next_delay = IEEE80211_PROBE_DELAY + | |
2740 | usecs_to_jiffies(local->hw.channel_change_time); | |
2741 | local->scan_state = SCAN_SEND_PROBE; | |
2742 | break; | |
2743 | case SCAN_SEND_PROBE: | |
2744 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
2745 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
2746 | local->scan_ssid_len); | |
2747 | next_delay = IEEE80211_CHANNEL_TIME; | |
2748 | } else | |
2749 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
2750 | local->scan_state = SCAN_SET_CHANNEL; | |
2751 | break; | |
2752 | } | |
2753 | ||
2754 | if (local->sta_scanning) | |
2755 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2756 | next_delay); | |
2757 | } | |
2758 | ||
2759 | ||
2760 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
2761 | u8 *ssid, size_t ssid_len) | |
2762 | { | |
2763 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2764 | struct ieee80211_sub_if_data *sdata; | |
2765 | ||
2766 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
2767 | return -EINVAL; | |
2768 | ||
2769 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
2770 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
2771 | * BSSID: MACAddress | |
2772 | * SSID | |
2773 | * ScanType: ACTIVE, PASSIVE | |
2774 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
2775 | * a Probe frame during active scanning | |
2776 | * ChannelList | |
2777 | * MinChannelTime (>= ProbeDelay), in TU | |
2778 | * MaxChannelTime: (>= MinChannelTime), in TU | |
2779 | */ | |
2780 | ||
2781 | /* MLME-SCAN.confirm | |
2782 | * BSSDescriptionSet | |
2783 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
2784 | */ | |
2785 | ||
2786 | if (local->sta_scanning) { | |
2787 | if (local->scan_dev == dev) | |
2788 | return 0; | |
2789 | return -EBUSY; | |
2790 | } | |
2791 | ||
2792 | if (local->ops->hw_scan) { | |
2793 | int rc = local->ops->hw_scan(local_to_hw(local), | |
2794 | ssid, ssid_len); | |
2795 | if (!rc) { | |
2796 | local->sta_scanning = 1; | |
2797 | local->scan_dev = dev; | |
2798 | } | |
2799 | return rc; | |
2800 | } | |
2801 | ||
2802 | local->sta_scanning = 1; | |
2803 | ||
2804 | read_lock(&local->sub_if_lock); | |
2805 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2806 | |
2807 | /* Don't stop the master interface, otherwise we can't transmit | |
2808 | * probes! */ | |
2809 | if (sdata->dev == local->mdev) | |
2810 | continue; | |
2811 | ||
f0706e82 JB |
2812 | netif_stop_queue(sdata->dev); |
2813 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2814 | sdata->u.sta.associated) | |
2815 | ieee80211_send_nullfunc(local, sdata, 1); | |
2816 | } | |
2817 | read_unlock(&local->sub_if_lock); | |
2818 | ||
2819 | if (ssid) { | |
2820 | local->scan_ssid_len = ssid_len; | |
2821 | memcpy(local->scan_ssid, ssid, ssid_len); | |
2822 | } else | |
2823 | local->scan_ssid_len = 0; | |
2824 | local->scan_state = SCAN_SET_CHANNEL; | |
2825 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
2826 | struct ieee80211_hw_mode, | |
2827 | list); | |
2828 | local->scan_channel_idx = 0; | |
2829 | local->scan_dev = dev; | |
2830 | ||
2831 | if (!(local->hw.flags & IEEE80211_HW_NO_PROBE_FILTERING) && | |
2832 | ieee80211_if_config(dev)) | |
2833 | printk(KERN_DEBUG "%s: failed to set BSSID for scan\n", | |
2834 | dev->name); | |
2835 | ||
2836 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
2837 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2838 | IEEE80211_CHANNEL_TIME); | |
2839 | ||
2840 | return 0; | |
2841 | } | |
2842 | ||
2843 | ||
2844 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
2845 | { | |
2846 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2847 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2848 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2849 | ||
2850 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2851 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); | |
2852 | ||
2853 | if (local->sta_scanning) { | |
2854 | if (local->scan_dev == dev) | |
2855 | return 0; | |
2856 | return -EBUSY; | |
2857 | } | |
2858 | ||
2859 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); | |
2860 | queue_work(local->hw.workqueue, &ifsta->work); | |
2861 | return 0; | |
2862 | } | |
2863 | ||
2864 | static char * | |
2865 | ieee80211_sta_scan_result(struct net_device *dev, | |
2866 | struct ieee80211_sta_bss *bss, | |
2867 | char *current_ev, char *end_buf) | |
2868 | { | |
2869 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2870 | struct iw_event iwe; | |
2871 | ||
2872 | if (time_after(jiffies, | |
2873 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2874 | return current_ev; | |
2875 | ||
2876 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
2877 | return current_ev; | |
2878 | ||
2879 | if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY && | |
2880 | !bss->wpa_ie && !bss->rsn_ie) | |
2881 | return current_ev; | |
2882 | ||
2883 | if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID && | |
2884 | (local->scan_ssid_len != bss->ssid_len || | |
2885 | memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0)) | |
2886 | return current_ev; | |
2887 | ||
2888 | memset(&iwe, 0, sizeof(iwe)); | |
2889 | iwe.cmd = SIOCGIWAP; | |
2890 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
2891 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
2892 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2893 | IW_EV_ADDR_LEN); | |
2894 | ||
2895 | memset(&iwe, 0, sizeof(iwe)); | |
2896 | iwe.cmd = SIOCGIWESSID; | |
2897 | iwe.u.data.length = bss->ssid_len; | |
2898 | iwe.u.data.flags = 1; | |
2899 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2900 | bss->ssid); | |
2901 | ||
2902 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
2903 | memset(&iwe, 0, sizeof(iwe)); | |
2904 | iwe.cmd = SIOCGIWMODE; | |
2905 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
2906 | iwe.u.mode = IW_MODE_MASTER; | |
2907 | else | |
2908 | iwe.u.mode = IW_MODE_ADHOC; | |
2909 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2910 | IW_EV_UINT_LEN); | |
2911 | } | |
2912 | ||
2913 | memset(&iwe, 0, sizeof(iwe)); | |
2914 | iwe.cmd = SIOCGIWFREQ; | |
2915 | iwe.u.freq.m = bss->channel; | |
2916 | iwe.u.freq.e = 0; | |
2917 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2918 | IW_EV_FREQ_LEN); | |
2919 | iwe.u.freq.m = bss->freq * 100000; | |
2920 | iwe.u.freq.e = 1; | |
2921 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2922 | IW_EV_FREQ_LEN); | |
2923 | ||
2924 | memset(&iwe, 0, sizeof(iwe)); | |
2925 | iwe.cmd = IWEVQUAL; | |
2926 | iwe.u.qual.qual = bss->signal; | |
2927 | iwe.u.qual.level = bss->rssi; | |
2928 | iwe.u.qual.noise = bss->noise; | |
2929 | iwe.u.qual.updated = local->wstats_flags; | |
2930 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2931 | IW_EV_QUAL_LEN); | |
2932 | ||
2933 | memset(&iwe, 0, sizeof(iwe)); | |
2934 | iwe.cmd = SIOCGIWENCODE; | |
2935 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
2936 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
2937 | else | |
2938 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
2939 | iwe.u.data.length = 0; | |
2940 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
2941 | ||
2942 | if (bss && bss->wpa_ie) { | |
2943 | memset(&iwe, 0, sizeof(iwe)); | |
2944 | iwe.cmd = IWEVGENIE; | |
2945 | iwe.u.data.length = bss->wpa_ie_len; | |
2946 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2947 | bss->wpa_ie); | |
2948 | } | |
2949 | ||
2950 | if (bss && bss->rsn_ie) { | |
2951 | memset(&iwe, 0, sizeof(iwe)); | |
2952 | iwe.cmd = IWEVGENIE; | |
2953 | iwe.u.data.length = bss->rsn_ie_len; | |
2954 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2955 | bss->rsn_ie); | |
2956 | } | |
2957 | ||
2958 | if (bss && bss->supp_rates_len > 0) { | |
2959 | /* display all supported rates in readable format */ | |
2960 | char *p = current_ev + IW_EV_LCP_LEN; | |
2961 | int i; | |
2962 | ||
2963 | memset(&iwe, 0, sizeof(iwe)); | |
2964 | iwe.cmd = SIOCGIWRATE; | |
2965 | /* Those two flags are ignored... */ | |
2966 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
2967 | ||
2968 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2969 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
2970 | 0x7f) * 500000); | |
2971 | p = iwe_stream_add_value(current_ev, p, | |
2972 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
2973 | } | |
2974 | current_ev = p; | |
2975 | } | |
2976 | ||
2977 | if (bss) { | |
2978 | char *buf; | |
2979 | buf = kmalloc(30, GFP_ATOMIC); | |
2980 | if (buf) { | |
2981 | memset(&iwe, 0, sizeof(iwe)); | |
2982 | iwe.cmd = IWEVCUSTOM; | |
2983 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
2984 | iwe.u.data.length = strlen(buf); | |
2985 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
2986 | &iwe, buf); | |
2987 | kfree(buf); | |
2988 | } | |
2989 | } | |
2990 | ||
2991 | do { | |
2992 | char *buf; | |
2993 | ||
2994 | if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO)) | |
2995 | break; | |
2996 | ||
2997 | buf = kmalloc(100, GFP_ATOMIC); | |
2998 | if (!buf) | |
2999 | break; | |
3000 | ||
3001 | memset(&iwe, 0, sizeof(iwe)); | |
3002 | iwe.cmd = IWEVCUSTOM; | |
3003 | sprintf(buf, "bcn_int=%d", bss->beacon_int); | |
3004 | iwe.u.data.length = strlen(buf); | |
3005 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3006 | buf); | |
3007 | ||
3008 | memset(&iwe, 0, sizeof(iwe)); | |
3009 | iwe.cmd = IWEVCUSTOM; | |
3010 | sprintf(buf, "capab=0x%04x", bss->capability); | |
3011 | iwe.u.data.length = strlen(buf); | |
3012 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3013 | buf); | |
3014 | ||
3015 | kfree(buf); | |
3016 | break; | |
3017 | } while (0); | |
3018 | ||
3019 | return current_ev; | |
3020 | } | |
3021 | ||
3022 | ||
3023 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
3024 | { | |
3025 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3026 | char *current_ev = buf; | |
3027 | char *end_buf = buf + len; | |
3028 | struct ieee80211_sta_bss *bss; | |
3029 | ||
3030 | spin_lock_bh(&local->sta_bss_lock); | |
3031 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3032 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3033 | spin_unlock_bh(&local->sta_bss_lock); | |
3034 | return -E2BIG; | |
3035 | } | |
3036 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3037 | end_buf); | |
3038 | } | |
3039 | spin_unlock_bh(&local->sta_bss_lock); | |
3040 | return current_ev - buf; | |
3041 | } | |
3042 | ||
3043 | ||
3044 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3045 | { | |
3046 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3047 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3048 | kfree(ifsta->extra_ie); | |
3049 | if (len == 0) { | |
3050 | ifsta->extra_ie = NULL; | |
3051 | ifsta->extra_ie_len = 0; | |
3052 | return 0; | |
3053 | } | |
3054 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3055 | if (!ifsta->extra_ie) { | |
3056 | ifsta->extra_ie_len = 0; | |
3057 | return -ENOMEM; | |
3058 | } | |
3059 | memcpy(ifsta->extra_ie, ie, len); | |
3060 | ifsta->extra_ie_len = len; | |
3061 | return 0; | |
3062 | } | |
3063 | ||
3064 | ||
3065 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3066 | struct sk_buff *skb, u8 *bssid, | |
3067 | u8 *addr) | |
3068 | { | |
3069 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3070 | struct sta_info *sta; | |
91fa558b | 3071 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
f0706e82 JB |
3072 | |
3073 | /* TODO: Could consider removing the least recently used entry and | |
3074 | * allow new one to be added. */ | |
3075 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3076 | if (net_ratelimit()) { | |
3077 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
3078 | "entry " MAC_FMT "\n", dev->name, MAC_ARG(addr)); | |
3079 | } | |
3080 | return NULL; | |
3081 | } | |
3082 | ||
3083 | printk(KERN_DEBUG "%s: Adding new IBSS station " MAC_FMT " (dev=%s)\n", | |
3084 | local->mdev->name, MAC_ARG(addr), dev->name); | |
3085 | ||
3086 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3087 | if (!sta) | |
3088 | return NULL; | |
3089 | ||
3090 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3091 | ||
3092 | rate_control_rate_init(sta, local); | |
3093 | ||
3094 | return sta; /* caller will call sta_info_put() */ | |
3095 | } | |
3096 | ||
3097 | ||
3098 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3099 | { | |
3100 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3101 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3102 | ||
3103 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3104 | dev->name, reason); | |
3105 | ||
3106 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
3107 | sdata->type != IEEE80211_IF_TYPE_IBSS) | |
3108 | return -EINVAL; | |
3109 | ||
3110 | ieee80211_send_deauth(dev, ifsta, reason); | |
3111 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3112 | return 0; | |
3113 | } | |
3114 | ||
3115 | ||
3116 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3117 | { | |
3118 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3119 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3120 | ||
3121 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3122 | dev->name, reason); | |
3123 | ||
3124 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3125 | return -EINVAL; | |
3126 | ||
3127 | if (!ifsta->associated) | |
3128 | return -1; | |
3129 | ||
3130 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3131 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3132 | return 0; | |
3133 | } |