Commit | Line | Data |
---|---|---|
f0706e82 JB |
1 | /* |
2 | * BSS client mode implementation | |
3 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
4 | * Copyright 2004, Instant802 Networks, Inc. | |
5 | * Copyright 2005, Devicescape Software, Inc. | |
6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | /* TODO: | |
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 | ||
c095df53 | 111 | enum ParseRes { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 }; |
f0706e82 | 112 | |
c095df53 JB |
113 | static enum ParseRes ieee802_11_parse_elems(u8 *start, size_t len, |
114 | struct ieee802_11_elems *elems) | |
f0706e82 JB |
115 | { |
116 | size_t left = len; | |
117 | u8 *pos = start; | |
118 | int unknown = 0; | |
119 | ||
120 | memset(elems, 0, sizeof(*elems)); | |
121 | ||
122 | while (left >= 2) { | |
123 | u8 id, elen; | |
124 | ||
125 | id = *pos++; | |
126 | elen = *pos++; | |
127 | left -= 2; | |
128 | ||
129 | if (elen > left) { | |
130 | #if 0 | |
131 | if (net_ratelimit()) | |
132 | printk(KERN_DEBUG "IEEE 802.11 element parse " | |
133 | "failed (id=%d elen=%d left=%d)\n", | |
134 | id, elen, left); | |
135 | #endif | |
136 | return ParseFailed; | |
137 | } | |
138 | ||
139 | switch (id) { | |
140 | case WLAN_EID_SSID: | |
141 | elems->ssid = pos; | |
142 | elems->ssid_len = elen; | |
143 | break; | |
144 | case WLAN_EID_SUPP_RATES: | |
145 | elems->supp_rates = pos; | |
146 | elems->supp_rates_len = elen; | |
147 | break; | |
148 | case WLAN_EID_FH_PARAMS: | |
149 | elems->fh_params = pos; | |
150 | elems->fh_params_len = elen; | |
151 | break; | |
152 | case WLAN_EID_DS_PARAMS: | |
153 | elems->ds_params = pos; | |
154 | elems->ds_params_len = elen; | |
155 | break; | |
156 | case WLAN_EID_CF_PARAMS: | |
157 | elems->cf_params = pos; | |
158 | elems->cf_params_len = elen; | |
159 | break; | |
160 | case WLAN_EID_TIM: | |
161 | elems->tim = pos; | |
162 | elems->tim_len = elen; | |
163 | break; | |
164 | case WLAN_EID_IBSS_PARAMS: | |
165 | elems->ibss_params = pos; | |
166 | elems->ibss_params_len = elen; | |
167 | break; | |
168 | case WLAN_EID_CHALLENGE: | |
169 | elems->challenge = pos; | |
170 | elems->challenge_len = elen; | |
171 | break; | |
172 | case WLAN_EID_WPA: | |
173 | if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && | |
174 | pos[2] == 0xf2) { | |
175 | /* Microsoft OUI (00:50:F2) */ | |
176 | if (pos[3] == 1) { | |
177 | /* OUI Type 1 - WPA IE */ | |
178 | elems->wpa = pos; | |
179 | elems->wpa_len = elen; | |
180 | } else if (elen >= 5 && pos[3] == 2) { | |
181 | if (pos[4] == 0) { | |
182 | elems->wmm_info = pos; | |
183 | elems->wmm_info_len = elen; | |
184 | } else if (pos[4] == 1) { | |
185 | elems->wmm_param = pos; | |
186 | elems->wmm_param_len = elen; | |
187 | } | |
188 | } | |
189 | } | |
190 | break; | |
191 | case WLAN_EID_RSN: | |
192 | elems->rsn = pos; | |
193 | elems->rsn_len = elen; | |
194 | break; | |
195 | case WLAN_EID_ERP_INFO: | |
196 | elems->erp_info = pos; | |
197 | elems->erp_info_len = elen; | |
198 | break; | |
199 | case WLAN_EID_EXT_SUPP_RATES: | |
200 | elems->ext_supp_rates = pos; | |
201 | elems->ext_supp_rates_len = elen; | |
202 | break; | |
203 | default: | |
204 | #if 0 | |
205 | printk(KERN_DEBUG "IEEE 802.11 element parse ignored " | |
206 | "unknown element (id=%d elen=%d)\n", | |
207 | id, elen); | |
208 | #endif | |
209 | unknown++; | |
210 | break; | |
211 | } | |
212 | ||
213 | left -= elen; | |
214 | pos += elen; | |
215 | } | |
216 | ||
217 | /* Do not trigger error if left == 1 as Apple Airport base stations | |
218 | * send AssocResps that are one spurious byte too long. */ | |
219 | ||
220 | return unknown ? ParseUnknown : ParseOK; | |
221 | } | |
222 | ||
223 | ||
224 | ||
225 | ||
226 | static int ecw2cw(int ecw) | |
227 | { | |
228 | int cw = 1; | |
229 | while (ecw > 0) { | |
230 | cw <<= 1; | |
231 | ecw--; | |
232 | } | |
233 | return cw - 1; | |
234 | } | |
235 | ||
f0706e82 JB |
236 | static void ieee80211_sta_wmm_params(struct net_device *dev, |
237 | struct ieee80211_if_sta *ifsta, | |
238 | u8 *wmm_param, size_t wmm_param_len) | |
239 | { | |
240 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
241 | struct ieee80211_tx_queue_params params; | |
242 | size_t left; | |
243 | int count; | |
244 | u8 *pos; | |
245 | ||
246 | if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) | |
247 | return; | |
248 | count = wmm_param[6] & 0x0f; | |
249 | if (count == ifsta->wmm_last_param_set) | |
250 | return; | |
251 | ifsta->wmm_last_param_set = count; | |
252 | ||
253 | pos = wmm_param + 8; | |
254 | left = wmm_param_len - 8; | |
255 | ||
256 | memset(¶ms, 0, sizeof(params)); | |
257 | ||
258 | if (!local->ops->conf_tx) | |
259 | return; | |
260 | ||
261 | local->wmm_acm = 0; | |
262 | for (; left >= 4; left -= 4, pos += 4) { | |
263 | int aci = (pos[0] >> 5) & 0x03; | |
264 | int acm = (pos[0] >> 4) & 0x01; | |
265 | int queue; | |
266 | ||
267 | switch (aci) { | |
268 | case 1: | |
269 | queue = IEEE80211_TX_QUEUE_DATA3; | |
270 | if (acm) { | |
271 | local->wmm_acm |= BIT(0) | BIT(3); | |
272 | } | |
273 | break; | |
274 | case 2: | |
275 | queue = IEEE80211_TX_QUEUE_DATA1; | |
276 | if (acm) { | |
277 | local->wmm_acm |= BIT(4) | BIT(5); | |
278 | } | |
279 | break; | |
280 | case 3: | |
281 | queue = IEEE80211_TX_QUEUE_DATA0; | |
282 | if (acm) { | |
283 | local->wmm_acm |= BIT(6) | BIT(7); | |
284 | } | |
285 | break; | |
286 | case 0: | |
287 | default: | |
288 | queue = IEEE80211_TX_QUEUE_DATA2; | |
289 | if (acm) { | |
290 | local->wmm_acm |= BIT(1) | BIT(2); | |
291 | } | |
292 | break; | |
293 | } | |
294 | ||
295 | params.aifs = pos[0] & 0x0f; | |
296 | params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4); | |
297 | params.cw_min = ecw2cw(pos[1] & 0x0f); | |
298 | /* TXOP is in units of 32 usec; burst_time in 0.1 ms */ | |
299 | params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100; | |
300 | printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d " | |
301 | "cWmin=%d cWmax=%d burst=%d\n", | |
302 | dev->name, queue, aci, acm, params.aifs, params.cw_min, | |
303 | params.cw_max, params.burst_time); | |
304 | /* TODO: handle ACM (block TX, fallback to next lowest allowed | |
305 | * AC for now) */ | |
306 | if (local->ops->conf_tx(local_to_hw(local), queue, ¶ms)) { | |
307 | printk(KERN_DEBUG "%s: failed to set TX queue " | |
308 | "parameters for queue %d\n", dev->name, queue); | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | ||
5628221c DD |
314 | static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value) |
315 | { | |
5628221c DD |
316 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
317 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
318 | int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0; | |
7e9ed188 | 319 | int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0; |
d9430a32 | 320 | u8 changes = 0; |
0795af57 | 321 | DECLARE_MAC_BUF(mac); |
5628221c | 322 | |
13262ffd | 323 | if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) { |
5628221c DD |
324 | if (net_ratelimit()) { |
325 | printk(KERN_DEBUG "%s: CTS protection %s (BSSID=" | |
0795af57 | 326 | "%s)\n", |
5628221c DD |
327 | dev->name, |
328 | use_protection ? "enabled" : "disabled", | |
0795af57 | 329 | print_mac(mac, ifsta->bssid)); |
5628221c | 330 | } |
13262ffd JS |
331 | if (use_protection) |
332 | sdata->flags |= IEEE80211_SDATA_USE_PROTECTION; | |
333 | else | |
334 | sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION; | |
d9430a32 | 335 | changes |= IEEE80211_ERP_CHANGE_PROTECTION; |
5628221c | 336 | } |
7e9ed188 | 337 | |
13262ffd | 338 | if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) { |
7e9ed188 DD |
339 | if (net_ratelimit()) { |
340 | printk(KERN_DEBUG "%s: switched to %s barker preamble" | |
0795af57 | 341 | " (BSSID=%s)\n", |
7e9ed188 DD |
342 | dev->name, |
343 | (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ? | |
344 | "short" : "long", | |
0795af57 | 345 | print_mac(mac, ifsta->bssid)); |
7e9ed188 | 346 | } |
13262ffd JS |
347 | if (preamble_mode) |
348 | sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE; | |
349 | else | |
350 | sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE; | |
d9430a32 | 351 | changes |= IEEE80211_ERP_CHANGE_PREAMBLE; |
7e9ed188 | 352 | } |
d9430a32 DD |
353 | |
354 | if (changes) | |
355 | ieee80211_erp_info_change_notify(dev, changes); | |
5628221c DD |
356 | } |
357 | ||
358 | ||
f0706e82 JB |
359 | static void ieee80211_sta_send_associnfo(struct net_device *dev, |
360 | struct ieee80211_if_sta *ifsta) | |
361 | { | |
362 | char *buf; | |
363 | size_t len; | |
364 | int i; | |
365 | union iwreq_data wrqu; | |
366 | ||
367 | if (!ifsta->assocreq_ies && !ifsta->assocresp_ies) | |
368 | return; | |
369 | ||
370 | buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len + | |
0ec0b7ac | 371 | ifsta->assocresp_ies_len), GFP_KERNEL); |
f0706e82 JB |
372 | if (!buf) |
373 | return; | |
374 | ||
375 | len = sprintf(buf, "ASSOCINFO("); | |
376 | if (ifsta->assocreq_ies) { | |
377 | len += sprintf(buf + len, "ReqIEs="); | |
378 | for (i = 0; i < ifsta->assocreq_ies_len; i++) { | |
379 | len += sprintf(buf + len, "%02x", | |
380 | ifsta->assocreq_ies[i]); | |
381 | } | |
382 | } | |
383 | if (ifsta->assocresp_ies) { | |
384 | if (ifsta->assocreq_ies) | |
385 | len += sprintf(buf + len, " "); | |
386 | len += sprintf(buf + len, "RespIEs="); | |
387 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
388 | len += sprintf(buf + len, "%02x", | |
389 | ifsta->assocresp_ies[i]); | |
390 | } | |
391 | } | |
392 | len += sprintf(buf + len, ")"); | |
393 | ||
394 | if (len > IW_CUSTOM_MAX) { | |
395 | len = sprintf(buf, "ASSOCRESPIE="); | |
396 | for (i = 0; i < ifsta->assocresp_ies_len; i++) { | |
397 | len += sprintf(buf + len, "%02x", | |
398 | ifsta->assocresp_ies[i]); | |
399 | } | |
400 | } | |
401 | ||
402 | memset(&wrqu, 0, sizeof(wrqu)); | |
403 | wrqu.data.length = len; | |
404 | wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); | |
405 | ||
406 | kfree(buf); | |
407 | } | |
408 | ||
409 | ||
410 | static void ieee80211_set_associated(struct net_device *dev, | |
d6f2da5b JS |
411 | struct ieee80211_if_sta *ifsta, |
412 | unsigned int assoc) | |
f0706e82 JB |
413 | { |
414 | union iwreq_data wrqu; | |
415 | ||
d6f2da5b | 416 | if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc) |
f0706e82 JB |
417 | return; |
418 | ||
f0706e82 JB |
419 | if (assoc) { |
420 | struct ieee80211_sub_if_data *sdata; | |
5628221c | 421 | struct ieee80211_sta_bss *bss; |
d6f2da5b JS |
422 | |
423 | ifsta->flags |= IEEE80211_STA_ASSOCIATED; | |
424 | ||
f0706e82 JB |
425 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
426 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
427 | return; | |
5628221c DD |
428 | |
429 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
430 | if (bss) { | |
431 | if (bss->has_erp_value) | |
432 | ieee80211_handle_erp_ie(dev, bss->erp_value); | |
433 | ieee80211_rx_bss_put(dev, bss); | |
434 | } | |
435 | ||
f0706e82 | 436 | netif_carrier_on(dev); |
d6f2da5b | 437 | ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
438 | memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN); |
439 | memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN); | |
440 | ieee80211_sta_send_associnfo(dev, ifsta); | |
441 | } else { | |
d6f2da5b JS |
442 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
443 | ||
f0706e82 | 444 | netif_carrier_off(dev); |
d9430a32 | 445 | ieee80211_reset_erp_info(dev); |
f0706e82 JB |
446 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); |
447 | } | |
448 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
449 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
450 | ifsta->last_probe = jiffies; | |
451 | } | |
452 | ||
453 | static void ieee80211_set_disassoc(struct net_device *dev, | |
454 | struct ieee80211_if_sta *ifsta, int deauth) | |
455 | { | |
456 | if (deauth) | |
457 | ifsta->auth_tries = 0; | |
458 | ifsta->assoc_tries = 0; | |
459 | ieee80211_set_associated(dev, ifsta, 0); | |
460 | } | |
461 | ||
462 | static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb, | |
463 | int encrypt) | |
464 | { | |
465 | struct ieee80211_sub_if_data *sdata; | |
466 | struct ieee80211_tx_packet_data *pkt_data; | |
467 | ||
468 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
469 | skb->dev = sdata->local->mdev; | |
470 | skb_set_mac_header(skb, 0); | |
471 | skb_set_network_header(skb, 0); | |
472 | skb_set_transport_header(skb, 0); | |
473 | ||
474 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
475 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
476 | pkt_data->ifindex = sdata->dev->ifindex; | |
e8bf9649 JS |
477 | if (sdata->type == IEEE80211_IF_TYPE_MGMT) |
478 | pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE; | |
479 | if (!encrypt) | |
480 | pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT; | |
f0706e82 JB |
481 | |
482 | dev_queue_xmit(skb); | |
483 | } | |
484 | ||
485 | ||
486 | static void ieee80211_send_auth(struct net_device *dev, | |
487 | struct ieee80211_if_sta *ifsta, | |
488 | int transaction, u8 *extra, size_t extra_len, | |
489 | int encrypt) | |
490 | { | |
491 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
492 | struct sk_buff *skb; | |
493 | struct ieee80211_mgmt *mgmt; | |
494 | ||
495 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
496 | sizeof(*mgmt) + 6 + extra_len); | |
497 | if (!skb) { | |
498 | printk(KERN_DEBUG "%s: failed to allocate buffer for auth " | |
499 | "frame\n", dev->name); | |
500 | return; | |
501 | } | |
502 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
503 | ||
504 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); | |
505 | memset(mgmt, 0, 24 + 6); | |
506 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
507 | IEEE80211_STYPE_AUTH); | |
508 | if (encrypt) | |
509 | mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
510 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
511 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
512 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
513 | mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg); | |
514 | mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); | |
515 | ifsta->auth_transaction = transaction + 1; | |
516 | mgmt->u.auth.status_code = cpu_to_le16(0); | |
517 | if (extra) | |
518 | memcpy(skb_put(skb, extra_len), extra, extra_len); | |
519 | ||
520 | ieee80211_sta_tx(dev, skb, encrypt); | |
521 | } | |
522 | ||
523 | ||
524 | static void ieee80211_authenticate(struct net_device *dev, | |
525 | struct ieee80211_if_sta *ifsta) | |
526 | { | |
0795af57 JP |
527 | DECLARE_MAC_BUF(mac); |
528 | ||
f0706e82 JB |
529 | ifsta->auth_tries++; |
530 | if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) { | |
0795af57 | 531 | printk(KERN_DEBUG "%s: authentication with AP %s" |
f0706e82 | 532 | " timed out\n", |
0795af57 | 533 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
534 | ifsta->state = IEEE80211_DISABLED; |
535 | return; | |
536 | } | |
537 | ||
538 | ifsta->state = IEEE80211_AUTHENTICATE; | |
0795af57 JP |
539 | printk(KERN_DEBUG "%s: authenticate with AP %s\n", |
540 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
541 | |
542 | ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0); | |
543 | ||
544 | mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT); | |
545 | } | |
546 | ||
547 | ||
548 | static void ieee80211_send_assoc(struct net_device *dev, | |
549 | struct ieee80211_if_sta *ifsta) | |
550 | { | |
551 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
552 | struct ieee80211_hw_mode *mode; | |
553 | struct sk_buff *skb; | |
554 | struct ieee80211_mgmt *mgmt; | |
555 | u8 *pos, *ies; | |
556 | int i, len; | |
557 | u16 capab; | |
558 | struct ieee80211_sta_bss *bss; | |
559 | int wmm = 0; | |
560 | ||
561 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
562 | sizeof(*mgmt) + 200 + ifsta->extra_ie_len + | |
563 | ifsta->ssid_len); | |
564 | if (!skb) { | |
565 | printk(KERN_DEBUG "%s: failed to allocate buffer for assoc " | |
566 | "frame\n", dev->name); | |
567 | return; | |
568 | } | |
569 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
570 | ||
571 | mode = local->oper_hw_mode; | |
572 | capab = ifsta->capab; | |
573 | if (mode->mode == MODE_IEEE80211G) { | |
574 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
575 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
576 | } | |
577 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
578 | if (bss) { | |
579 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
580 | capab |= WLAN_CAPABILITY_PRIVACY; | |
581 | if (bss->wmm_ie) { | |
582 | wmm = 1; | |
583 | } | |
584 | ieee80211_rx_bss_put(dev, bss); | |
585 | } | |
586 | ||
587 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
588 | memset(mgmt, 0, 24); | |
589 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
590 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
591 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
592 | ||
d6f2da5b | 593 | if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) { |
f0706e82 JB |
594 | skb_put(skb, 10); |
595 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
596 | IEEE80211_STYPE_REASSOC_REQ); | |
597 | mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); | |
598 | mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1); | |
599 | memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid, | |
600 | ETH_ALEN); | |
601 | } else { | |
602 | skb_put(skb, 4); | |
603 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
604 | IEEE80211_STYPE_ASSOC_REQ); | |
605 | mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); | |
606 | mgmt->u.assoc_req.listen_interval = cpu_to_le16(1); | |
607 | } | |
608 | ||
609 | /* SSID */ | |
610 | ies = pos = skb_put(skb, 2 + ifsta->ssid_len); | |
611 | *pos++ = WLAN_EID_SSID; | |
612 | *pos++ = ifsta->ssid_len; | |
613 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
614 | ||
615 | len = mode->num_rates; | |
616 | if (len > 8) | |
617 | len = 8; | |
618 | pos = skb_put(skb, len + 2); | |
619 | *pos++ = WLAN_EID_SUPP_RATES; | |
620 | *pos++ = len; | |
621 | for (i = 0; i < len; i++) { | |
622 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
623 | *pos++ = (u8) (rate / 5); |
624 | } | |
625 | ||
626 | if (mode->num_rates > len) { | |
627 | pos = skb_put(skb, mode->num_rates - len + 2); | |
628 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
629 | *pos++ = mode->num_rates - len; | |
630 | for (i = len; i < mode->num_rates; i++) { | |
631 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
632 | *pos++ = (u8) (rate / 5); |
633 | } | |
634 | } | |
635 | ||
636 | if (ifsta->extra_ie) { | |
637 | pos = skb_put(skb, ifsta->extra_ie_len); | |
638 | memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len); | |
639 | } | |
640 | ||
d6f2da5b | 641 | if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
642 | pos = skb_put(skb, 9); |
643 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; | |
644 | *pos++ = 7; /* len */ | |
645 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ | |
646 | *pos++ = 0x50; | |
647 | *pos++ = 0xf2; | |
648 | *pos++ = 2; /* WME */ | |
649 | *pos++ = 0; /* WME info */ | |
650 | *pos++ = 1; /* WME ver */ | |
651 | *pos++ = 0; | |
652 | } | |
653 | ||
654 | kfree(ifsta->assocreq_ies); | |
655 | ifsta->assocreq_ies_len = (skb->data + skb->len) - ies; | |
0ec0b7ac | 656 | ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL); |
f0706e82 JB |
657 | if (ifsta->assocreq_ies) |
658 | memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len); | |
659 | ||
660 | ieee80211_sta_tx(dev, skb, 0); | |
661 | } | |
662 | ||
663 | ||
664 | static void ieee80211_send_deauth(struct net_device *dev, | |
665 | struct ieee80211_if_sta *ifsta, u16 reason) | |
666 | { | |
667 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
668 | struct sk_buff *skb; | |
669 | struct ieee80211_mgmt *mgmt; | |
670 | ||
671 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
672 | if (!skb) { | |
673 | printk(KERN_DEBUG "%s: failed to allocate buffer for deauth " | |
674 | "frame\n", dev->name); | |
675 | return; | |
676 | } | |
677 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
678 | ||
679 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
680 | memset(mgmt, 0, 24); | |
681 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
682 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
683 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
684 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
685 | IEEE80211_STYPE_DEAUTH); | |
686 | skb_put(skb, 2); | |
687 | mgmt->u.deauth.reason_code = cpu_to_le16(reason); | |
688 | ||
689 | ieee80211_sta_tx(dev, skb, 0); | |
690 | } | |
691 | ||
692 | ||
693 | static void ieee80211_send_disassoc(struct net_device *dev, | |
694 | struct ieee80211_if_sta *ifsta, u16 reason) | |
695 | { | |
696 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
697 | struct sk_buff *skb; | |
698 | struct ieee80211_mgmt *mgmt; | |
699 | ||
700 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt)); | |
701 | if (!skb) { | |
702 | printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc " | |
703 | "frame\n", dev->name); | |
704 | return; | |
705 | } | |
706 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
707 | ||
708 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
709 | memset(mgmt, 0, 24); | |
710 | memcpy(mgmt->da, ifsta->bssid, ETH_ALEN); | |
711 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
712 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
713 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
714 | IEEE80211_STYPE_DISASSOC); | |
715 | skb_put(skb, 2); | |
716 | mgmt->u.disassoc.reason_code = cpu_to_le16(reason); | |
717 | ||
718 | ieee80211_sta_tx(dev, skb, 0); | |
719 | } | |
720 | ||
721 | ||
722 | static int ieee80211_privacy_mismatch(struct net_device *dev, | |
723 | struct ieee80211_if_sta *ifsta) | |
724 | { | |
725 | struct ieee80211_sta_bss *bss; | |
726 | int res = 0; | |
727 | ||
d6f2da5b JS |
728 | if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL) || |
729 | ifsta->key_management_enabled) | |
f0706e82 JB |
730 | return 0; |
731 | ||
732 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
733 | if (!bss) | |
734 | return 0; | |
735 | ||
736 | if (ieee80211_sta_wep_configured(dev) != | |
737 | !!(bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
738 | res = 1; | |
739 | ||
740 | ieee80211_rx_bss_put(dev, bss); | |
741 | ||
742 | return res; | |
743 | } | |
744 | ||
745 | ||
746 | static void ieee80211_associate(struct net_device *dev, | |
747 | struct ieee80211_if_sta *ifsta) | |
748 | { | |
0795af57 JP |
749 | DECLARE_MAC_BUF(mac); |
750 | ||
f0706e82 JB |
751 | ifsta->assoc_tries++; |
752 | if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) { | |
0795af57 | 753 | printk(KERN_DEBUG "%s: association with AP %s" |
f0706e82 | 754 | " timed out\n", |
0795af57 | 755 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 JB |
756 | ifsta->state = IEEE80211_DISABLED; |
757 | return; | |
758 | } | |
759 | ||
760 | ifsta->state = IEEE80211_ASSOCIATE; | |
0795af57 JP |
761 | printk(KERN_DEBUG "%s: associate with AP %s\n", |
762 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
763 | if (ieee80211_privacy_mismatch(dev, ifsta)) { |
764 | printk(KERN_DEBUG "%s: mismatch in privacy configuration and " | |
765 | "mixed-cell disabled - abort association\n", dev->name); | |
766 | ifsta->state = IEEE80211_DISABLED; | |
767 | return; | |
768 | } | |
769 | ||
770 | ieee80211_send_assoc(dev, ifsta); | |
771 | ||
772 | mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT); | |
773 | } | |
774 | ||
775 | ||
776 | static void ieee80211_associated(struct net_device *dev, | |
777 | struct ieee80211_if_sta *ifsta) | |
778 | { | |
779 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
780 | struct sta_info *sta; | |
781 | int disassoc; | |
0795af57 | 782 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
783 | |
784 | /* TODO: start monitoring current AP signal quality and number of | |
785 | * missed beacons. Scan other channels every now and then and search | |
786 | * for better APs. */ | |
787 | /* TODO: remove expired BSSes */ | |
788 | ||
789 | ifsta->state = IEEE80211_ASSOCIATED; | |
790 | ||
791 | sta = sta_info_get(local, ifsta->bssid); | |
792 | if (!sta) { | |
0795af57 JP |
793 | printk(KERN_DEBUG "%s: No STA entry for own AP %s\n", |
794 | dev->name, print_mac(mac, ifsta->bssid)); | |
f0706e82 JB |
795 | disassoc = 1; |
796 | } else { | |
797 | disassoc = 0; | |
798 | if (time_after(jiffies, | |
799 | sta->last_rx + IEEE80211_MONITORING_INTERVAL)) { | |
d6f2da5b | 800 | if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) { |
f0706e82 | 801 | printk(KERN_DEBUG "%s: No ProbeResp from " |
0795af57 | 802 | "current AP %s - assume out of " |
f0706e82 | 803 | "range\n", |
0795af57 | 804 | dev->name, print_mac(mac, ifsta->bssid)); |
f0706e82 | 805 | disassoc = 1; |
be8755e1 | 806 | sta_info_free(sta); |
d6f2da5b | 807 | } else |
f0706e82 JB |
808 | ieee80211_send_probe_req(dev, ifsta->bssid, |
809 | local->scan_ssid, | |
810 | local->scan_ssid_len); | |
d6f2da5b | 811 | ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 | 812 | } else { |
d6f2da5b | 813 | ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL; |
f0706e82 JB |
814 | if (time_after(jiffies, ifsta->last_probe + |
815 | IEEE80211_PROBE_INTERVAL)) { | |
816 | ifsta->last_probe = jiffies; | |
817 | ieee80211_send_probe_req(dev, ifsta->bssid, | |
818 | ifsta->ssid, | |
819 | ifsta->ssid_len); | |
820 | } | |
821 | } | |
822 | sta_info_put(sta); | |
823 | } | |
824 | if (disassoc) { | |
825 | union iwreq_data wrqu; | |
826 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
827 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
828 | wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); | |
829 | mod_timer(&ifsta->timer, jiffies + | |
830 | IEEE80211_MONITORING_INTERVAL + 30 * HZ); | |
831 | } else { | |
832 | mod_timer(&ifsta->timer, jiffies + | |
833 | IEEE80211_MONITORING_INTERVAL); | |
834 | } | |
835 | } | |
836 | ||
837 | ||
838 | static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst, | |
839 | u8 *ssid, size_t ssid_len) | |
840 | { | |
841 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
842 | struct ieee80211_hw_mode *mode; | |
843 | struct sk_buff *skb; | |
844 | struct ieee80211_mgmt *mgmt; | |
845 | u8 *pos, *supp_rates, *esupp_rates = NULL; | |
846 | int i; | |
847 | ||
848 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200); | |
849 | if (!skb) { | |
850 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
851 | "request\n", dev->name); | |
852 | return; | |
853 | } | |
854 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
855 | ||
856 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
857 | memset(mgmt, 0, 24); | |
858 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
859 | IEEE80211_STYPE_PROBE_REQ); | |
860 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
861 | if (dst) { | |
862 | memcpy(mgmt->da, dst, ETH_ALEN); | |
863 | memcpy(mgmt->bssid, dst, ETH_ALEN); | |
864 | } else { | |
865 | memset(mgmt->da, 0xff, ETH_ALEN); | |
866 | memset(mgmt->bssid, 0xff, ETH_ALEN); | |
867 | } | |
868 | pos = skb_put(skb, 2 + ssid_len); | |
869 | *pos++ = WLAN_EID_SSID; | |
870 | *pos++ = ssid_len; | |
871 | memcpy(pos, ssid, ssid_len); | |
872 | ||
873 | supp_rates = skb_put(skb, 2); | |
874 | supp_rates[0] = WLAN_EID_SUPP_RATES; | |
875 | supp_rates[1] = 0; | |
876 | mode = local->oper_hw_mode; | |
877 | for (i = 0; i < mode->num_rates; i++) { | |
878 | struct ieee80211_rate *rate = &mode->rates[i]; | |
879 | if (!(rate->flags & IEEE80211_RATE_SUPPORTED)) | |
880 | continue; | |
881 | if (esupp_rates) { | |
882 | pos = skb_put(skb, 1); | |
883 | esupp_rates[1]++; | |
884 | } else if (supp_rates[1] == 8) { | |
885 | esupp_rates = skb_put(skb, 3); | |
886 | esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES; | |
887 | esupp_rates[1] = 1; | |
888 | pos = &esupp_rates[2]; | |
889 | } else { | |
890 | pos = skb_put(skb, 1); | |
891 | supp_rates[1]++; | |
892 | } | |
b708e610 | 893 | *pos = rate->rate / 5; |
f0706e82 JB |
894 | } |
895 | ||
896 | ieee80211_sta_tx(dev, skb, 0); | |
897 | } | |
898 | ||
899 | ||
900 | static int ieee80211_sta_wep_configured(struct net_device *dev) | |
901 | { | |
902 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
903 | if (!sdata || !sdata->default_key || | |
8f20fc24 | 904 | sdata->default_key->conf.alg != ALG_WEP) |
f0706e82 JB |
905 | return 0; |
906 | return 1; | |
907 | } | |
908 | ||
909 | ||
910 | static void ieee80211_auth_completed(struct net_device *dev, | |
911 | struct ieee80211_if_sta *ifsta) | |
912 | { | |
913 | printk(KERN_DEBUG "%s: authenticated\n", dev->name); | |
d6f2da5b | 914 | ifsta->flags |= IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
915 | ieee80211_associate(dev, ifsta); |
916 | } | |
917 | ||
918 | ||
919 | static void ieee80211_auth_challenge(struct net_device *dev, | |
920 | struct ieee80211_if_sta *ifsta, | |
921 | struct ieee80211_mgmt *mgmt, | |
922 | size_t len) | |
923 | { | |
924 | u8 *pos; | |
925 | struct ieee802_11_elems elems; | |
926 | ||
927 | printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name); | |
928 | pos = mgmt->u.auth.variable; | |
929 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
930 | == ParseFailed) { | |
931 | printk(KERN_DEBUG "%s: failed to parse Auth(challenge)\n", | |
932 | dev->name); | |
933 | return; | |
934 | } | |
935 | if (!elems.challenge) { | |
936 | printk(KERN_DEBUG "%s: no challenge IE in shared key auth " | |
937 | "frame\n", dev->name); | |
938 | return; | |
939 | } | |
940 | ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2, | |
941 | elems.challenge_len + 2, 1); | |
942 | } | |
943 | ||
944 | ||
945 | static void ieee80211_rx_mgmt_auth(struct net_device *dev, | |
946 | struct ieee80211_if_sta *ifsta, | |
947 | struct ieee80211_mgmt *mgmt, | |
948 | size_t len) | |
949 | { | |
950 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
951 | u16 auth_alg, auth_transaction, status_code; | |
0795af57 | 952 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
953 | |
954 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
955 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
956 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
957 | "%s, but not in authenticate state - ignored\n", |
958 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
959 | return; |
960 | } | |
961 | ||
962 | if (len < 24 + 6) { | |
963 | printk(KERN_DEBUG "%s: too short (%zd) authentication frame " | |
0795af57 JP |
964 | "received from %s - ignored\n", |
965 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
966 | return; |
967 | } | |
968 | ||
969 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
970 | memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
971 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
972 | "unknown AP (SA=%s BSSID=%s) - " |
973 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
974 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
975 | return; |
976 | } | |
977 | ||
978 | if (sdata->type != IEEE80211_IF_TYPE_IBSS && | |
979 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) { | |
980 | printk(KERN_DEBUG "%s: authentication frame received from " | |
0795af57 JP |
981 | "unknown BSSID (SA=%s BSSID=%s) - " |
982 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
983 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
984 | return; |
985 | } | |
986 | ||
987 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); | |
988 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); | |
989 | status_code = le16_to_cpu(mgmt->u.auth.status_code); | |
990 | ||
0795af57 | 991 | printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d " |
f0706e82 | 992 | "transaction=%d status=%d)\n", |
0795af57 | 993 | dev->name, print_mac(mac, mgmt->sa), auth_alg, |
f0706e82 JB |
994 | auth_transaction, status_code); |
995 | ||
996 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
997 | /* IEEE 802.11 standard does not require authentication in IBSS | |
998 | * networks and most implementations do not seem to use it. | |
999 | * However, try to reply to authentication attempts if someone | |
1000 | * has actually implemented this. | |
1001 | * TODO: Could implement shared key authentication. */ | |
1002 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) { | |
1003 | printk(KERN_DEBUG "%s: unexpected IBSS authentication " | |
1004 | "frame (alg=%d transaction=%d)\n", | |
1005 | dev->name, auth_alg, auth_transaction); | |
1006 | return; | |
1007 | } | |
1008 | ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0); | |
1009 | } | |
1010 | ||
1011 | if (auth_alg != ifsta->auth_alg || | |
1012 | auth_transaction != ifsta->auth_transaction) { | |
1013 | printk(KERN_DEBUG "%s: unexpected authentication frame " | |
1014 | "(alg=%d transaction=%d)\n", | |
1015 | dev->name, auth_alg, auth_transaction); | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1020 | printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d " | |
1021 | "code=%d)\n", dev->name, ifsta->auth_alg, status_code); | |
1022 | if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) { | |
1023 | u8 algs[3]; | |
1024 | const int num_algs = ARRAY_SIZE(algs); | |
1025 | int i, pos; | |
1026 | algs[0] = algs[1] = algs[2] = 0xff; | |
1027 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
1028 | algs[0] = WLAN_AUTH_OPEN; | |
1029 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
1030 | algs[1] = WLAN_AUTH_SHARED_KEY; | |
1031 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
1032 | algs[2] = WLAN_AUTH_LEAP; | |
1033 | if (ifsta->auth_alg == WLAN_AUTH_OPEN) | |
1034 | pos = 0; | |
1035 | else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY) | |
1036 | pos = 1; | |
1037 | else | |
1038 | pos = 2; | |
1039 | for (i = 0; i < num_algs; i++) { | |
1040 | pos++; | |
1041 | if (pos >= num_algs) | |
1042 | pos = 0; | |
1043 | if (algs[pos] == ifsta->auth_alg || | |
1044 | algs[pos] == 0xff) | |
1045 | continue; | |
1046 | if (algs[pos] == WLAN_AUTH_SHARED_KEY && | |
1047 | !ieee80211_sta_wep_configured(dev)) | |
1048 | continue; | |
1049 | ifsta->auth_alg = algs[pos]; | |
1050 | printk(KERN_DEBUG "%s: set auth_alg=%d for " | |
1051 | "next try\n", | |
1052 | dev->name, ifsta->auth_alg); | |
1053 | break; | |
1054 | } | |
1055 | } | |
1056 | return; | |
1057 | } | |
1058 | ||
1059 | switch (ifsta->auth_alg) { | |
1060 | case WLAN_AUTH_OPEN: | |
1061 | case WLAN_AUTH_LEAP: | |
1062 | ieee80211_auth_completed(dev, ifsta); | |
1063 | break; | |
1064 | case WLAN_AUTH_SHARED_KEY: | |
1065 | if (ifsta->auth_transaction == 4) | |
1066 | ieee80211_auth_completed(dev, ifsta); | |
1067 | else | |
1068 | ieee80211_auth_challenge(dev, ifsta, mgmt, len); | |
1069 | break; | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | ||
1074 | static void ieee80211_rx_mgmt_deauth(struct net_device *dev, | |
1075 | struct ieee80211_if_sta *ifsta, | |
1076 | struct ieee80211_mgmt *mgmt, | |
1077 | size_t len) | |
1078 | { | |
1079 | u16 reason_code; | |
0795af57 | 1080 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1081 | |
1082 | if (len < 24 + 2) { | |
1083 | printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame " | |
0795af57 JP |
1084 | "received from %s - ignored\n", |
1085 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1086 | return; |
1087 | } | |
1088 | ||
1089 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1090 | printk(KERN_DEBUG "%s: deauthentication frame received from " | |
0795af57 JP |
1091 | "unknown AP (SA=%s BSSID=%s) - " |
1092 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1093 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1094 | return; |
1095 | } | |
1096 | ||
1097 | reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); | |
1098 | ||
0795af57 | 1099 | printk(KERN_DEBUG "%s: RX deauthentication from %s" |
f0706e82 | 1100 | " (reason=%d)\n", |
0795af57 | 1101 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1102 | |
d6f2da5b | 1103 | if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) { |
f0706e82 JB |
1104 | printk(KERN_DEBUG "%s: deauthenticated\n", dev->name); |
1105 | } | |
1106 | ||
1107 | if (ifsta->state == IEEE80211_AUTHENTICATE || | |
1108 | ifsta->state == IEEE80211_ASSOCIATE || | |
1109 | ifsta->state == IEEE80211_ASSOCIATED) { | |
1110 | ifsta->state = IEEE80211_AUTHENTICATE; | |
1111 | mod_timer(&ifsta->timer, jiffies + | |
1112 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1113 | } | |
1114 | ||
1115 | ieee80211_set_disassoc(dev, ifsta, 1); | |
d6f2da5b | 1116 | ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED; |
f0706e82 JB |
1117 | } |
1118 | ||
1119 | ||
1120 | static void ieee80211_rx_mgmt_disassoc(struct net_device *dev, | |
1121 | struct ieee80211_if_sta *ifsta, | |
1122 | struct ieee80211_mgmt *mgmt, | |
1123 | size_t len) | |
1124 | { | |
1125 | u16 reason_code; | |
0795af57 | 1126 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1127 | |
1128 | if (len < 24 + 2) { | |
1129 | printk(KERN_DEBUG "%s: too short (%zd) disassociation frame " | |
0795af57 JP |
1130 | "received from %s - ignored\n", |
1131 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1132 | return; |
1133 | } | |
1134 | ||
1135 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1136 | printk(KERN_DEBUG "%s: disassociation frame received from " | |
0795af57 JP |
1137 | "unknown AP (SA=%s BSSID=%s) - " |
1138 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1139 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1140 | return; |
1141 | } | |
1142 | ||
1143 | reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); | |
1144 | ||
0795af57 | 1145 | printk(KERN_DEBUG "%s: RX disassociation from %s" |
f0706e82 | 1146 | " (reason=%d)\n", |
0795af57 | 1147 | dev->name, print_mac(mac, mgmt->sa), reason_code); |
f0706e82 | 1148 | |
d6f2da5b | 1149 | if (ifsta->flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
1150 | printk(KERN_DEBUG "%s: disassociated\n", dev->name); |
1151 | ||
1152 | if (ifsta->state == IEEE80211_ASSOCIATED) { | |
1153 | ifsta->state = IEEE80211_ASSOCIATE; | |
1154 | mod_timer(&ifsta->timer, jiffies + | |
1155 | IEEE80211_RETRY_AUTH_INTERVAL); | |
1156 | } | |
1157 | ||
1158 | ieee80211_set_disassoc(dev, ifsta, 0); | |
1159 | } | |
1160 | ||
1161 | ||
1162 | static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev, | |
1163 | struct ieee80211_if_sta *ifsta, | |
1164 | struct ieee80211_mgmt *mgmt, | |
1165 | size_t len, | |
1166 | int reassoc) | |
1167 | { | |
1168 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1169 | struct ieee80211_hw_mode *mode; | |
1170 | struct sta_info *sta; | |
1171 | u32 rates; | |
1172 | u16 capab_info, status_code, aid; | |
1173 | struct ieee802_11_elems elems; | |
1174 | u8 *pos; | |
1175 | int i, j; | |
0795af57 | 1176 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
1177 | |
1178 | /* AssocResp and ReassocResp have identical structure, so process both | |
1179 | * of them in this function. */ | |
1180 | ||
1181 | if (ifsta->state != IEEE80211_ASSOCIATE) { | |
1182 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1183 | "%s, but not in associate state - ignored\n", |
1184 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1185 | return; |
1186 | } | |
1187 | ||
1188 | if (len < 24 + 6) { | |
1189 | printk(KERN_DEBUG "%s: too short (%zd) association frame " | |
0795af57 JP |
1190 | "received from %s - ignored\n", |
1191 | dev->name, len, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1192 | return; |
1193 | } | |
1194 | ||
1195 | if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) { | |
1196 | printk(KERN_DEBUG "%s: association frame received from " | |
0795af57 JP |
1197 | "unknown AP (SA=%s BSSID=%s) - " |
1198 | "ignored\n", dev->name, print_mac(mac, mgmt->sa), | |
1199 | print_mac(mac, mgmt->bssid)); | |
f0706e82 JB |
1200 | return; |
1201 | } | |
1202 | ||
1203 | capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); | |
1204 | status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); | |
1205 | aid = le16_to_cpu(mgmt->u.assoc_resp.aid); | |
1206 | if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) | |
1207 | printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not " | |
1208 | "set\n", dev->name, aid); | |
1209 | aid &= ~(BIT(15) | BIT(14)); | |
1210 | ||
0795af57 | 1211 | printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x " |
f0706e82 | 1212 | "status=%d aid=%d)\n", |
0795af57 | 1213 | dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa), |
f0706e82 JB |
1214 | capab_info, status_code, aid); |
1215 | ||
1216 | if (status_code != WLAN_STATUS_SUCCESS) { | |
1217 | printk(KERN_DEBUG "%s: AP denied association (code=%d)\n", | |
1218 | dev->name, status_code); | |
8a69aa93 DD |
1219 | /* if this was a reassociation, ensure we try a "full" |
1220 | * association next time. This works around some broken APs | |
1221 | * which do not correctly reject reassociation requests. */ | |
d6f2da5b | 1222 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
1223 | return; |
1224 | } | |
1225 | ||
1226 | pos = mgmt->u.assoc_resp.variable; | |
1227 | if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems) | |
1228 | == ParseFailed) { | |
1229 | printk(KERN_DEBUG "%s: failed to parse AssocResp\n", | |
1230 | dev->name); | |
1231 | return; | |
1232 | } | |
1233 | ||
1234 | if (!elems.supp_rates) { | |
1235 | printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n", | |
1236 | dev->name); | |
1237 | return; | |
1238 | } | |
1239 | ||
5628221c DD |
1240 | /* it probably doesn't, but if the frame includes an ERP value then |
1241 | * update our stored copy */ | |
1242 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1243 | struct ieee80211_sta_bss *bss | |
1244 | = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1245 | if (bss) { | |
1246 | bss->erp_value = elems.erp_info[0]; | |
1247 | bss->has_erp_value = 1; | |
1248 | ieee80211_rx_bss_put(dev, bss); | |
1249 | } | |
1250 | } | |
1251 | ||
f0706e82 JB |
1252 | printk(KERN_DEBUG "%s: associated\n", dev->name); |
1253 | ifsta->aid = aid; | |
1254 | ifsta->ap_capab = capab_info; | |
1255 | ||
1256 | kfree(ifsta->assocresp_ies); | |
1257 | ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt); | |
0ec0b7ac | 1258 | ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL); |
f0706e82 JB |
1259 | if (ifsta->assocresp_ies) |
1260 | memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len); | |
1261 | ||
1262 | ieee80211_set_associated(dev, ifsta, 1); | |
1263 | ||
1264 | /* Add STA entry for the AP */ | |
1265 | sta = sta_info_get(local, ifsta->bssid); | |
1266 | if (!sta) { | |
1267 | struct ieee80211_sta_bss *bss; | |
0ec0b7ac | 1268 | sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL); |
f0706e82 JB |
1269 | if (!sta) { |
1270 | printk(KERN_DEBUG "%s: failed to add STA entry for the" | |
1271 | " AP\n", dev->name); | |
1272 | return; | |
1273 | } | |
1274 | bss = ieee80211_rx_bss_get(dev, ifsta->bssid); | |
1275 | if (bss) { | |
1276 | sta->last_rssi = bss->rssi; | |
1277 | sta->last_signal = bss->signal; | |
1278 | sta->last_noise = bss->noise; | |
1279 | ieee80211_rx_bss_put(dev, bss); | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | sta->dev = dev; | |
c9ee23df | 1284 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP; |
f0706e82 JB |
1285 | |
1286 | rates = 0; | |
1287 | mode = local->oper_hw_mode; | |
1288 | for (i = 0; i < elems.supp_rates_len; i++) { | |
1289 | int rate = (elems.supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1290 | for (j = 0; j < mode->num_rates; j++) |
1291 | if (mode->rates[j].rate == rate) | |
1292 | rates |= BIT(j); | |
1293 | } | |
1294 | for (i = 0; i < elems.ext_supp_rates_len; i++) { | |
1295 | int rate = (elems.ext_supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
1296 | for (j = 0; j < mode->num_rates; j++) |
1297 | if (mode->rates[j].rate == rate) | |
1298 | rates |= BIT(j); | |
1299 | } | |
1300 | sta->supp_rates = rates; | |
1301 | ||
1302 | rate_control_rate_init(sta, local); | |
1303 | ||
d6f2da5b | 1304 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
1305 | sta->flags |= WLAN_STA_WME; |
1306 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, | |
1307 | elems.wmm_param_len); | |
1308 | } | |
1309 | ||
1310 | ||
1311 | sta_info_put(sta); | |
1312 | ||
1313 | ieee80211_associated(dev, ifsta); | |
1314 | } | |
1315 | ||
1316 | ||
1317 | /* Caller must hold local->sta_bss_lock */ | |
1318 | static void __ieee80211_rx_bss_hash_add(struct net_device *dev, | |
1319 | struct ieee80211_sta_bss *bss) | |
1320 | { | |
1321 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1322 | bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1323 | local->sta_bss_hash[STA_HASH(bss->bssid)] = bss; | |
1324 | } | |
1325 | ||
1326 | ||
1327 | /* Caller must hold local->sta_bss_lock */ | |
1328 | static void __ieee80211_rx_bss_hash_del(struct net_device *dev, | |
1329 | struct ieee80211_sta_bss *bss) | |
1330 | { | |
1331 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1332 | struct ieee80211_sta_bss *b, *prev = NULL; | |
1333 | b = local->sta_bss_hash[STA_HASH(bss->bssid)]; | |
1334 | while (b) { | |
1335 | if (b == bss) { | |
1336 | if (!prev) | |
1337 | local->sta_bss_hash[STA_HASH(bss->bssid)] = | |
1338 | bss->hnext; | |
1339 | else | |
1340 | prev->hnext = bss->hnext; | |
1341 | break; | |
1342 | } | |
1343 | prev = b; | |
1344 | b = b->hnext; | |
1345 | } | |
1346 | } | |
1347 | ||
1348 | ||
1349 | static struct ieee80211_sta_bss * | |
1350 | ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid) | |
1351 | { | |
1352 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1353 | struct ieee80211_sta_bss *bss; | |
1354 | ||
dd00cc48 | 1355 | bss = kzalloc(sizeof(*bss), GFP_ATOMIC); |
f0706e82 JB |
1356 | if (!bss) |
1357 | return NULL; | |
f0706e82 JB |
1358 | atomic_inc(&bss->users); |
1359 | atomic_inc(&bss->users); | |
1360 | memcpy(bss->bssid, bssid, ETH_ALEN); | |
1361 | ||
1362 | spin_lock_bh(&local->sta_bss_lock); | |
1363 | /* TODO: order by RSSI? */ | |
1364 | list_add_tail(&bss->list, &local->sta_bss_list); | |
1365 | __ieee80211_rx_bss_hash_add(dev, bss); | |
1366 | spin_unlock_bh(&local->sta_bss_lock); | |
1367 | return bss; | |
1368 | } | |
1369 | ||
1370 | ||
1371 | static struct ieee80211_sta_bss * | |
1372 | ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid) | |
1373 | { | |
1374 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1375 | struct ieee80211_sta_bss *bss; | |
1376 | ||
1377 | spin_lock_bh(&local->sta_bss_lock); | |
1378 | bss = local->sta_bss_hash[STA_HASH(bssid)]; | |
1379 | while (bss) { | |
1380 | if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0) { | |
1381 | atomic_inc(&bss->users); | |
1382 | break; | |
1383 | } | |
1384 | bss = bss->hnext; | |
1385 | } | |
1386 | spin_unlock_bh(&local->sta_bss_lock); | |
1387 | return bss; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss) | |
1392 | { | |
1393 | kfree(bss->wpa_ie); | |
1394 | kfree(bss->rsn_ie); | |
1395 | kfree(bss->wmm_ie); | |
1396 | kfree(bss); | |
1397 | } | |
1398 | ||
1399 | ||
1400 | static void ieee80211_rx_bss_put(struct net_device *dev, | |
1401 | struct ieee80211_sta_bss *bss) | |
1402 | { | |
1403 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1404 | if (!atomic_dec_and_test(&bss->users)) | |
1405 | return; | |
1406 | ||
1407 | spin_lock_bh(&local->sta_bss_lock); | |
1408 | __ieee80211_rx_bss_hash_del(dev, bss); | |
1409 | list_del(&bss->list); | |
1410 | spin_unlock_bh(&local->sta_bss_lock); | |
1411 | ieee80211_rx_bss_free(bss); | |
1412 | } | |
1413 | ||
1414 | ||
1415 | void ieee80211_rx_bss_list_init(struct net_device *dev) | |
1416 | { | |
1417 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1418 | spin_lock_init(&local->sta_bss_lock); | |
1419 | INIT_LIST_HEAD(&local->sta_bss_list); | |
1420 | } | |
1421 | ||
1422 | ||
1423 | void ieee80211_rx_bss_list_deinit(struct net_device *dev) | |
1424 | { | |
1425 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1426 | struct ieee80211_sta_bss *bss, *tmp; | |
1427 | ||
1428 | list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list) | |
1429 | ieee80211_rx_bss_put(dev, bss); | |
1430 | } | |
1431 | ||
1432 | ||
1433 | static void ieee80211_rx_bss_info(struct net_device *dev, | |
1434 | struct ieee80211_mgmt *mgmt, | |
1435 | size_t len, | |
1436 | struct ieee80211_rx_status *rx_status, | |
1437 | int beacon) | |
1438 | { | |
1439 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1440 | struct ieee802_11_elems elems; | |
1441 | size_t baselen; | |
1442 | int channel, invalid = 0, clen; | |
1443 | struct ieee80211_sta_bss *bss; | |
1444 | struct sta_info *sta; | |
1445 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1446 | u64 timestamp; | |
0795af57 JP |
1447 | DECLARE_MAC_BUF(mac); |
1448 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
1449 | |
1450 | if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN)) | |
1451 | return; /* ignore ProbeResp to foreign address */ | |
1452 | ||
1453 | #if 0 | |
0795af57 | 1454 | printk(KERN_DEBUG "%s: RX %s from %s to %s\n", |
f0706e82 | 1455 | dev->name, beacon ? "Beacon" : "Probe Response", |
0795af57 | 1456 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da)); |
f0706e82 JB |
1457 | #endif |
1458 | ||
1459 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1460 | if (baselen > len) | |
1461 | return; | |
1462 | ||
1463 | timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1464 | ||
1465 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon && | |
1466 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { | |
1467 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1468 | static unsigned long last_tsf_debug = 0; | |
1469 | u64 tsf; | |
1470 | if (local->ops->get_tsf) | |
1471 | tsf = local->ops->get_tsf(local_to_hw(local)); | |
1472 | else | |
1473 | tsf = -1LLU; | |
1474 | if (time_after(jiffies, last_tsf_debug + 5 * HZ)) { | |
0795af57 JP |
1475 | printk(KERN_DEBUG "RX beacon SA=%s BSSID=" |
1476 | "%s TSF=0x%llx BCN=0x%llx diff=%lld " | |
f0706e82 | 1477 | "@%lu\n", |
0795af57 | 1478 | print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid), |
f0706e82 JB |
1479 | (unsigned long long)tsf, |
1480 | (unsigned long long)timestamp, | |
1481 | (unsigned long long)(tsf - timestamp), | |
1482 | jiffies); | |
1483 | last_tsf_debug = jiffies; | |
1484 | } | |
1485 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
1486 | } | |
1487 | ||
1488 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1489 | &elems) == ParseFailed) | |
1490 | invalid = 1; | |
1491 | ||
1492 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates && | |
1493 | memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 && | |
1494 | (sta = sta_info_get(local, mgmt->sa))) { | |
1495 | struct ieee80211_hw_mode *mode; | |
1496 | struct ieee80211_rate *rates; | |
1497 | size_t num_rates; | |
1498 | u32 supp_rates, prev_rates; | |
1499 | int i, j; | |
1500 | ||
1501 | mode = local->sta_scanning ? | |
1502 | local->scan_hw_mode : local->oper_hw_mode; | |
1503 | rates = mode->rates; | |
1504 | num_rates = mode->num_rates; | |
1505 | ||
1506 | supp_rates = 0; | |
1507 | for (i = 0; i < elems.supp_rates_len + | |
1508 | elems.ext_supp_rates_len; i++) { | |
1509 | u8 rate = 0; | |
1510 | int own_rate; | |
1511 | if (i < elems.supp_rates_len) | |
1512 | rate = elems.supp_rates[i]; | |
1513 | else if (elems.ext_supp_rates) | |
1514 | rate = elems.ext_supp_rates | |
1515 | [i - elems.supp_rates_len]; | |
1516 | own_rate = 5 * (rate & 0x7f); | |
f0706e82 JB |
1517 | for (j = 0; j < num_rates; j++) |
1518 | if (rates[j].rate == own_rate) | |
1519 | supp_rates |= BIT(j); | |
1520 | } | |
1521 | ||
1522 | prev_rates = sta->supp_rates; | |
1523 | sta->supp_rates &= supp_rates; | |
1524 | if (sta->supp_rates == 0) { | |
1525 | /* No matching rates - this should not really happen. | |
1526 | * Make sure that at least one rate is marked | |
1527 | * supported to avoid issues with TX rate ctrl. */ | |
1528 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
1529 | } | |
1530 | if (sta->supp_rates != prev_rates) { | |
1531 | printk(KERN_DEBUG "%s: updated supp_rates set for " | |
0795af57 | 1532 | "%s based on beacon info (0x%x & 0x%x -> " |
f0706e82 | 1533 | "0x%x)\n", |
0795af57 | 1534 | dev->name, print_mac(mac, sta->addr), prev_rates, |
f0706e82 JB |
1535 | supp_rates, sta->supp_rates); |
1536 | } | |
1537 | sta_info_put(sta); | |
1538 | } | |
1539 | ||
1540 | if (!elems.ssid) | |
1541 | return; | |
1542 | ||
1543 | if (elems.ds_params && elems.ds_params_len == 1) | |
1544 | channel = elems.ds_params[0]; | |
1545 | else | |
1546 | channel = rx_status->channel; | |
1547 | ||
1548 | bss = ieee80211_rx_bss_get(dev, mgmt->bssid); | |
1549 | if (!bss) { | |
1550 | bss = ieee80211_rx_bss_add(dev, mgmt->bssid); | |
1551 | if (!bss) | |
1552 | return; | |
1553 | } else { | |
1554 | #if 0 | |
1555 | /* TODO: order by RSSI? */ | |
1556 | spin_lock_bh(&local->sta_bss_lock); | |
1557 | list_move_tail(&bss->list, &local->sta_bss_list); | |
1558 | spin_unlock_bh(&local->sta_bss_lock); | |
1559 | #endif | |
1560 | } | |
1561 | ||
1562 | if (bss->probe_resp && beacon) { | |
1563 | /* Do not allow beacon to override data from Probe Response. */ | |
1564 | ieee80211_rx_bss_put(dev, bss); | |
1565 | return; | |
1566 | } | |
1567 | ||
5628221c DD |
1568 | /* save the ERP value so that it is available at association time */ |
1569 | if (elems.erp_info && elems.erp_info_len >= 1) { | |
1570 | bss->erp_value = elems.erp_info[0]; | |
1571 | bss->has_erp_value = 1; | |
1572 | } | |
1573 | ||
f0706e82 JB |
1574 | bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int); |
1575 | bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info); | |
1576 | if (elems.ssid && elems.ssid_len <= IEEE80211_MAX_SSID_LEN) { | |
1577 | memcpy(bss->ssid, elems.ssid, elems.ssid_len); | |
1578 | bss->ssid_len = elems.ssid_len; | |
1579 | } | |
1580 | ||
1581 | bss->supp_rates_len = 0; | |
1582 | if (elems.supp_rates) { | |
1583 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1584 | if (clen > elems.supp_rates_len) | |
1585 | clen = elems.supp_rates_len; | |
1586 | memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates, | |
1587 | clen); | |
1588 | bss->supp_rates_len += clen; | |
1589 | } | |
1590 | if (elems.ext_supp_rates) { | |
1591 | clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len; | |
1592 | if (clen > elems.ext_supp_rates_len) | |
1593 | clen = elems.ext_supp_rates_len; | |
1594 | memcpy(&bss->supp_rates[bss->supp_rates_len], | |
1595 | elems.ext_supp_rates, clen); | |
1596 | bss->supp_rates_len += clen; | |
1597 | } | |
1598 | ||
1599 | if (elems.wpa && | |
1600 | (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len || | |
1601 | memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) { | |
1602 | kfree(bss->wpa_ie); | |
1603 | bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC); | |
1604 | if (bss->wpa_ie) { | |
1605 | memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2); | |
1606 | bss->wpa_ie_len = elems.wpa_len + 2; | |
1607 | } else | |
1608 | bss->wpa_ie_len = 0; | |
1609 | } else if (!elems.wpa && bss->wpa_ie) { | |
1610 | kfree(bss->wpa_ie); | |
1611 | bss->wpa_ie = NULL; | |
1612 | bss->wpa_ie_len = 0; | |
1613 | } | |
1614 | ||
1615 | if (elems.rsn && | |
1616 | (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len || | |
1617 | memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) { | |
1618 | kfree(bss->rsn_ie); | |
1619 | bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC); | |
1620 | if (bss->rsn_ie) { | |
1621 | memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2); | |
1622 | bss->rsn_ie_len = elems.rsn_len + 2; | |
1623 | } else | |
1624 | bss->rsn_ie_len = 0; | |
1625 | } else if (!elems.rsn && bss->rsn_ie) { | |
1626 | kfree(bss->rsn_ie); | |
1627 | bss->rsn_ie = NULL; | |
1628 | bss->rsn_ie_len = 0; | |
1629 | } | |
1630 | ||
1631 | if (elems.wmm_param && | |
1632 | (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len || | |
1633 | memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) { | |
1634 | kfree(bss->wmm_ie); | |
1635 | bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC); | |
1636 | if (bss->wmm_ie) { | |
1637 | memcpy(bss->wmm_ie, elems.wmm_param - 2, | |
1638 | elems.wmm_param_len + 2); | |
1639 | bss->wmm_ie_len = elems.wmm_param_len + 2; | |
1640 | } else | |
1641 | bss->wmm_ie_len = 0; | |
1642 | } else if (!elems.wmm_param && bss->wmm_ie) { | |
1643 | kfree(bss->wmm_ie); | |
1644 | bss->wmm_ie = NULL; | |
1645 | bss->wmm_ie_len = 0; | |
1646 | } | |
1647 | ||
1648 | ||
1649 | bss->hw_mode = rx_status->phymode; | |
1650 | bss->channel = channel; | |
1651 | bss->freq = rx_status->freq; | |
1652 | if (channel != rx_status->channel && | |
1653 | (bss->hw_mode == MODE_IEEE80211G || | |
1654 | bss->hw_mode == MODE_IEEE80211B) && | |
1655 | channel >= 1 && channel <= 14) { | |
1656 | static const int freq_list[] = { | |
1657 | 2412, 2417, 2422, 2427, 2432, 2437, 2442, | |
1658 | 2447, 2452, 2457, 2462, 2467, 2472, 2484 | |
1659 | }; | |
1660 | /* IEEE 802.11g/b mode can receive packets from neighboring | |
1661 | * channels, so map the channel into frequency. */ | |
1662 | bss->freq = freq_list[channel - 1]; | |
1663 | } | |
1664 | bss->timestamp = timestamp; | |
1665 | bss->last_update = jiffies; | |
1666 | bss->rssi = rx_status->ssi; | |
1667 | bss->signal = rx_status->signal; | |
1668 | bss->noise = rx_status->noise; | |
1669 | if (!beacon) | |
1670 | bss->probe_resp++; | |
1671 | ieee80211_rx_bss_put(dev, bss); | |
1672 | } | |
1673 | ||
1674 | ||
1675 | static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev, | |
1676 | struct ieee80211_mgmt *mgmt, | |
1677 | size_t len, | |
1678 | struct ieee80211_rx_status *rx_status) | |
1679 | { | |
1680 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0); | |
1681 | } | |
1682 | ||
1683 | ||
1684 | static void ieee80211_rx_mgmt_beacon(struct net_device *dev, | |
1685 | struct ieee80211_mgmt *mgmt, | |
1686 | size_t len, | |
1687 | struct ieee80211_rx_status *rx_status) | |
1688 | { | |
f0706e82 JB |
1689 | struct ieee80211_sub_if_data *sdata; |
1690 | struct ieee80211_if_sta *ifsta; | |
f0706e82 JB |
1691 | size_t baselen; |
1692 | struct ieee802_11_elems elems; | |
1693 | ||
1694 | ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1); | |
1695 | ||
1696 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1697 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
1698 | return; | |
1699 | ifsta = &sdata->u.sta; | |
1700 | ||
d6f2da5b | 1701 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) || |
f0706e82 JB |
1702 | memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) |
1703 | return; | |
1704 | ||
1705 | /* Process beacon from the current BSS */ | |
1706 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; | |
1707 | if (baselen > len) | |
1708 | return; | |
1709 | ||
1710 | if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, | |
1711 | &elems) == ParseFailed) | |
1712 | return; | |
1713 | ||
5628221c DD |
1714 | if (elems.erp_info && elems.erp_info_len >= 1) |
1715 | ieee80211_handle_erp_ie(dev, elems.erp_info[0]); | |
f0706e82 | 1716 | |
d6f2da5b | 1717 | if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) { |
f0706e82 JB |
1718 | ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param, |
1719 | elems.wmm_param_len); | |
1720 | } | |
1721 | } | |
1722 | ||
1723 | ||
1724 | static void ieee80211_rx_mgmt_probe_req(struct net_device *dev, | |
1725 | struct ieee80211_if_sta *ifsta, | |
1726 | struct ieee80211_mgmt *mgmt, | |
1727 | size_t len, | |
1728 | struct ieee80211_rx_status *rx_status) | |
1729 | { | |
1730 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1731 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1732 | int tx_last_beacon; | |
1733 | struct sk_buff *skb; | |
1734 | struct ieee80211_mgmt *resp; | |
1735 | u8 *pos, *end; | |
0795af57 JP |
1736 | DECLARE_MAC_BUF(mac); |
1737 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
1738 | DECLARE_MAC_BUF(mac2); | |
1739 | DECLARE_MAC_BUF(mac3); | |
1740 | #endif | |
f0706e82 JB |
1741 | |
1742 | if (sdata->type != IEEE80211_IF_TYPE_IBSS || | |
1743 | ifsta->state != IEEE80211_IBSS_JOINED || | |
1744 | len < 24 + 2 || !ifsta->probe_resp) | |
1745 | return; | |
1746 | ||
1747 | if (local->ops->tx_last_beacon) | |
1748 | tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local)); | |
1749 | else | |
1750 | tx_last_beacon = 1; | |
1751 | ||
1752 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
1753 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID=" |
1754 | "%s (tx_last_beacon=%d)\n", | |
1755 | dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da), | |
1756 | print_mac(mac3, mgmt->bssid), tx_last_beacon); | |
f0706e82 JB |
1757 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1758 | ||
1759 | if (!tx_last_beacon) | |
1760 | return; | |
1761 | ||
1762 | if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 && | |
1763 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) | |
1764 | return; | |
1765 | ||
1766 | end = ((u8 *) mgmt) + len; | |
1767 | pos = mgmt->u.probe_req.variable; | |
1768 | if (pos[0] != WLAN_EID_SSID || | |
1769 | pos + 2 + pos[1] > end) { | |
1770 | if (net_ratelimit()) { | |
1771 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " | |
0795af57 JP |
1772 | "from %s\n", |
1773 | dev->name, print_mac(mac, mgmt->sa)); | |
f0706e82 JB |
1774 | } |
1775 | return; | |
1776 | } | |
1777 | if (pos[1] != 0 && | |
1778 | (pos[1] != ifsta->ssid_len || | |
1779 | memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) { | |
1780 | /* Ignore ProbeReq for foreign SSID */ | |
1781 | return; | |
1782 | } | |
1783 | ||
1784 | /* Reply with ProbeResp */ | |
0ec0b7ac | 1785 | skb = skb_copy(ifsta->probe_resp, GFP_KERNEL); |
f0706e82 JB |
1786 | if (!skb) |
1787 | return; | |
1788 | ||
1789 | resp = (struct ieee80211_mgmt *) skb->data; | |
1790 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
1791 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
1792 | printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n", |
1793 | dev->name, print_mac(mac, resp->da)); | |
f0706e82 JB |
1794 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
1795 | ieee80211_sta_tx(dev, skb, 0); | |
1796 | } | |
1797 | ||
1798 | ||
1799 | void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb, | |
1800 | struct ieee80211_rx_status *rx_status) | |
1801 | { | |
1802 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1803 | struct ieee80211_sub_if_data *sdata; | |
1804 | struct ieee80211_if_sta *ifsta; | |
1805 | struct ieee80211_mgmt *mgmt; | |
1806 | u16 fc; | |
1807 | ||
1808 | if (skb->len < 24) | |
1809 | goto fail; | |
1810 | ||
1811 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1812 | ifsta = &sdata->u.sta; | |
1813 | ||
1814 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1815 | fc = le16_to_cpu(mgmt->frame_control); | |
1816 | ||
1817 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1818 | case IEEE80211_STYPE_PROBE_REQ: | |
1819 | case IEEE80211_STYPE_PROBE_RESP: | |
1820 | case IEEE80211_STYPE_BEACON: | |
1821 | memcpy(skb->cb, rx_status, sizeof(*rx_status)); | |
1822 | case IEEE80211_STYPE_AUTH: | |
1823 | case IEEE80211_STYPE_ASSOC_RESP: | |
1824 | case IEEE80211_STYPE_REASSOC_RESP: | |
1825 | case IEEE80211_STYPE_DEAUTH: | |
1826 | case IEEE80211_STYPE_DISASSOC: | |
1827 | skb_queue_tail(&ifsta->skb_queue, skb); | |
1828 | queue_work(local->hw.workqueue, &ifsta->work); | |
1829 | return; | |
1830 | default: | |
1831 | printk(KERN_DEBUG "%s: received unknown management frame - " | |
1832 | "stype=%d\n", dev->name, | |
1833 | (fc & IEEE80211_FCTL_STYPE) >> 4); | |
1834 | break; | |
1835 | } | |
1836 | ||
1837 | fail: | |
1838 | kfree_skb(skb); | |
1839 | } | |
1840 | ||
1841 | ||
1842 | static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev, | |
1843 | struct sk_buff *skb) | |
1844 | { | |
1845 | struct ieee80211_rx_status *rx_status; | |
1846 | struct ieee80211_sub_if_data *sdata; | |
1847 | struct ieee80211_if_sta *ifsta; | |
1848 | struct ieee80211_mgmt *mgmt; | |
1849 | u16 fc; | |
1850 | ||
1851 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1852 | ifsta = &sdata->u.sta; | |
1853 | ||
1854 | rx_status = (struct ieee80211_rx_status *) skb->cb; | |
1855 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1856 | fc = le16_to_cpu(mgmt->frame_control); | |
1857 | ||
1858 | switch (fc & IEEE80211_FCTL_STYPE) { | |
1859 | case IEEE80211_STYPE_PROBE_REQ: | |
1860 | ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len, | |
1861 | rx_status); | |
1862 | break; | |
1863 | case IEEE80211_STYPE_PROBE_RESP: | |
1864 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status); | |
1865 | break; | |
1866 | case IEEE80211_STYPE_BEACON: | |
1867 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status); | |
1868 | break; | |
1869 | case IEEE80211_STYPE_AUTH: | |
1870 | ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len); | |
1871 | break; | |
1872 | case IEEE80211_STYPE_ASSOC_RESP: | |
1873 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0); | |
1874 | break; | |
1875 | case IEEE80211_STYPE_REASSOC_RESP: | |
1876 | ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1); | |
1877 | break; | |
1878 | case IEEE80211_STYPE_DEAUTH: | |
1879 | ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len); | |
1880 | break; | |
1881 | case IEEE80211_STYPE_DISASSOC: | |
1882 | ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len); | |
1883 | break; | |
1884 | } | |
1885 | ||
1886 | kfree_skb(skb); | |
1887 | } | |
1888 | ||
1889 | ||
1890 | void ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb, | |
1891 | struct ieee80211_rx_status *rx_status) | |
1892 | { | |
1893 | struct ieee80211_mgmt *mgmt; | |
1894 | u16 fc; | |
1895 | ||
1896 | if (skb->len < 24) { | |
1897 | dev_kfree_skb(skb); | |
1898 | return; | |
1899 | } | |
1900 | ||
1901 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
1902 | fc = le16_to_cpu(mgmt->frame_control); | |
1903 | ||
1904 | if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) { | |
1905 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) { | |
1906 | ieee80211_rx_mgmt_probe_resp(dev, mgmt, | |
1907 | skb->len, rx_status); | |
1908 | } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) { | |
1909 | ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, | |
1910 | rx_status); | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | dev_kfree_skb(skb); | |
1915 | } | |
1916 | ||
1917 | ||
1918 | static int ieee80211_sta_active_ibss(struct net_device *dev) | |
1919 | { | |
1920 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1921 | int active = 0; | |
1922 | struct sta_info *sta; | |
1923 | ||
be8755e1 | 1924 | read_lock_bh(&local->sta_lock); |
f0706e82 JB |
1925 | list_for_each_entry(sta, &local->sta_list, list) { |
1926 | if (sta->dev == dev && | |
1927 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, | |
1928 | jiffies)) { | |
1929 | active++; | |
1930 | break; | |
1931 | } | |
1932 | } | |
be8755e1 | 1933 | read_unlock_bh(&local->sta_lock); |
f0706e82 JB |
1934 | |
1935 | return active; | |
1936 | } | |
1937 | ||
1938 | ||
1939 | static void ieee80211_sta_expire(struct net_device *dev) | |
1940 | { | |
1941 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1942 | struct sta_info *sta, *tmp; | |
be8755e1 | 1943 | LIST_HEAD(tmp_list); |
0795af57 | 1944 | DECLARE_MAC_BUF(mac); |
f0706e82 | 1945 | |
be8755e1 | 1946 | write_lock_bh(&local->sta_lock); |
f0706e82 JB |
1947 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) |
1948 | if (time_after(jiffies, sta->last_rx + | |
1949 | IEEE80211_IBSS_INACTIVITY_LIMIT)) { | |
0795af57 JP |
1950 | printk(KERN_DEBUG "%s: expiring inactive STA %s\n", |
1951 | dev->name, print_mac(mac, sta->addr)); | |
be8755e1 MW |
1952 | __sta_info_get(sta); |
1953 | sta_info_remove(sta); | |
1954 | list_add(&sta->list, &tmp_list); | |
f0706e82 | 1955 | } |
be8755e1 MW |
1956 | write_unlock_bh(&local->sta_lock); |
1957 | ||
1958 | list_for_each_entry_safe(sta, tmp, &tmp_list, list) { | |
1959 | sta_info_free(sta); | |
1960 | sta_info_put(sta); | |
1961 | } | |
f0706e82 JB |
1962 | } |
1963 | ||
1964 | ||
1965 | static void ieee80211_sta_merge_ibss(struct net_device *dev, | |
1966 | struct ieee80211_if_sta *ifsta) | |
1967 | { | |
1968 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
1969 | ||
1970 | ieee80211_sta_expire(dev); | |
1971 | if (ieee80211_sta_active_ibss(dev)) | |
1972 | return; | |
1973 | ||
1974 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " | |
1975 | "IBSS networks with same SSID (merge)\n", dev->name); | |
1976 | ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len); | |
1977 | } | |
1978 | ||
1979 | ||
1980 | void ieee80211_sta_timer(unsigned long data) | |
1981 | { | |
1982 | struct ieee80211_sub_if_data *sdata = | |
1983 | (struct ieee80211_sub_if_data *) data; | |
1984 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
1985 | struct ieee80211_local *local = wdev_priv(&sdata->wdev); | |
1986 | ||
1987 | set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
1988 | queue_work(local->hw.workqueue, &ifsta->work); | |
1989 | } | |
1990 | ||
1991 | ||
1992 | void ieee80211_sta_work(struct work_struct *work) | |
1993 | { | |
1994 | struct ieee80211_sub_if_data *sdata = | |
1995 | container_of(work, struct ieee80211_sub_if_data, u.sta.work); | |
1996 | struct net_device *dev = sdata->dev; | |
1997 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1998 | struct ieee80211_if_sta *ifsta; | |
1999 | struct sk_buff *skb; | |
2000 | ||
2001 | if (!netif_running(dev)) | |
2002 | return; | |
2003 | ||
2004 | if (local->sta_scanning) | |
2005 | return; | |
2006 | ||
2007 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
2008 | sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
2009 | printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface " | |
2010 | "(type=%d)\n", dev->name, sdata->type); | |
2011 | return; | |
2012 | } | |
2013 | ifsta = &sdata->u.sta; | |
2014 | ||
2015 | while ((skb = skb_dequeue(&ifsta->skb_queue))) | |
2016 | ieee80211_sta_rx_queued_mgmt(dev, skb); | |
2017 | ||
2018 | if (ifsta->state != IEEE80211_AUTHENTICATE && | |
2019 | ifsta->state != IEEE80211_ASSOCIATE && | |
2020 | test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) { | |
2021 | ieee80211_sta_start_scan(dev, NULL, 0); | |
2022 | return; | |
2023 | } | |
2024 | ||
2025 | if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) { | |
2026 | if (ieee80211_sta_config_auth(dev, ifsta)) | |
2027 | return; | |
2028 | clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request); | |
2029 | } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request)) | |
2030 | return; | |
2031 | ||
2032 | switch (ifsta->state) { | |
2033 | case IEEE80211_DISABLED: | |
2034 | break; | |
2035 | case IEEE80211_AUTHENTICATE: | |
2036 | ieee80211_authenticate(dev, ifsta); | |
2037 | break; | |
2038 | case IEEE80211_ASSOCIATE: | |
2039 | ieee80211_associate(dev, ifsta); | |
2040 | break; | |
2041 | case IEEE80211_ASSOCIATED: | |
2042 | ieee80211_associated(dev, ifsta); | |
2043 | break; | |
2044 | case IEEE80211_IBSS_SEARCH: | |
2045 | ieee80211_sta_find_ibss(dev, ifsta); | |
2046 | break; | |
2047 | case IEEE80211_IBSS_JOINED: | |
2048 | ieee80211_sta_merge_ibss(dev, ifsta); | |
2049 | break; | |
2050 | default: | |
2051 | printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n", | |
2052 | ifsta->state); | |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | if (ieee80211_privacy_mismatch(dev, ifsta)) { | |
2057 | printk(KERN_DEBUG "%s: privacy configuration mismatch and " | |
2058 | "mixed-cell disabled - disassociate\n", dev->name); | |
2059 | ||
2060 | ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED); | |
2061 | ieee80211_set_disassoc(dev, ifsta, 0); | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | ||
2066 | static void ieee80211_sta_reset_auth(struct net_device *dev, | |
2067 | struct ieee80211_if_sta *ifsta) | |
2068 | { | |
2069 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2070 | ||
2071 | if (local->ops->reset_tsf) { | |
2072 | /* Reset own TSF to allow time synchronization work. */ | |
2073 | local->ops->reset_tsf(local_to_hw(local)); | |
2074 | } | |
2075 | ||
2076 | ifsta->wmm_last_param_set = -1; /* allow any WMM update */ | |
2077 | ||
2078 | ||
2079 | if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN) | |
2080 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2081 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY) | |
2082 | ifsta->auth_alg = WLAN_AUTH_SHARED_KEY; | |
2083 | else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP) | |
2084 | ifsta->auth_alg = WLAN_AUTH_LEAP; | |
2085 | else | |
2086 | ifsta->auth_alg = WLAN_AUTH_OPEN; | |
2087 | printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name, | |
2088 | ifsta->auth_alg); | |
2089 | ifsta->auth_transaction = -1; | |
d6f2da5b JS |
2090 | ifsta->flags &= ~IEEE80211_STA_ASSOCIATED; |
2091 | ifsta->auth_tries = ifsta->assoc_tries = 0; | |
f0706e82 JB |
2092 | netif_carrier_off(dev); |
2093 | } | |
2094 | ||
2095 | ||
2096 | void ieee80211_sta_req_auth(struct net_device *dev, | |
2097 | struct ieee80211_if_sta *ifsta) | |
2098 | { | |
2099 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2100 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2101 | ||
2102 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2103 | return; | |
2104 | ||
d6f2da5b JS |
2105 | if ((ifsta->flags & (IEEE80211_STA_BSSID_SET | |
2106 | IEEE80211_STA_AUTO_BSSID_SEL)) && | |
2107 | (ifsta->flags & (IEEE80211_STA_SSID_SET | | |
2108 | IEEE80211_STA_AUTO_SSID_SEL))) { | |
f0706e82 JB |
2109 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); |
2110 | queue_work(local->hw.workqueue, &ifsta->work); | |
2111 | } | |
2112 | } | |
2113 | ||
2114 | static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta, | |
2115 | const char *ssid, int ssid_len) | |
2116 | { | |
2117 | int tmp, hidden_ssid; | |
2118 | ||
2119 | if (!memcmp(ifsta->ssid, ssid, ssid_len)) | |
2120 | return 1; | |
2121 | ||
d6f2da5b | 2122 | if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) |
f0706e82 JB |
2123 | return 0; |
2124 | ||
2125 | hidden_ssid = 1; | |
2126 | tmp = ssid_len; | |
2127 | while (tmp--) { | |
2128 | if (ssid[tmp] != '\0') { | |
2129 | hidden_ssid = 0; | |
2130 | break; | |
2131 | } | |
2132 | } | |
2133 | ||
2134 | if (hidden_ssid && ifsta->ssid_len == ssid_len) | |
2135 | return 1; | |
2136 | ||
2137 | if (ssid_len == 1 && ssid[0] == ' ') | |
2138 | return 1; | |
2139 | ||
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | static int ieee80211_sta_config_auth(struct net_device *dev, | |
2144 | struct ieee80211_if_sta *ifsta) | |
2145 | { | |
2146 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2147 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2148 | struct ieee80211_sta_bss *bss, *selected = NULL; | |
2149 | int top_rssi = 0, freq; | |
2150 | ||
d6f2da5b JS |
2151 | if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL | |
2152 | IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) { | |
f0706e82 | 2153 | ifsta->state = IEEE80211_AUTHENTICATE; |
f0706e82 JB |
2154 | ieee80211_sta_reset_auth(dev, ifsta); |
2155 | return 0; | |
2156 | } | |
2157 | ||
2158 | spin_lock_bh(&local->sta_bss_lock); | |
2159 | freq = local->oper_channel->freq; | |
2160 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2161 | if (!(bss->capability & WLAN_CAPABILITY_ESS)) | |
2162 | continue; | |
2163 | ||
2164 | if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^ | |
2165 | !!sdata->default_key) | |
2166 | continue; | |
2167 | ||
d6f2da5b JS |
2168 | if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) && |
2169 | bss->freq != freq) | |
f0706e82 JB |
2170 | continue; |
2171 | ||
d6f2da5b | 2172 | if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) && |
f0706e82 JB |
2173 | memcmp(bss->bssid, ifsta->bssid, ETH_ALEN)) |
2174 | continue; | |
2175 | ||
d6f2da5b | 2176 | if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) && |
f0706e82 JB |
2177 | !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len)) |
2178 | continue; | |
2179 | ||
2180 | if (!selected || top_rssi < bss->rssi) { | |
2181 | selected = bss; | |
2182 | top_rssi = bss->rssi; | |
2183 | } | |
2184 | } | |
2185 | if (selected) | |
2186 | atomic_inc(&selected->users); | |
2187 | spin_unlock_bh(&local->sta_bss_lock); | |
2188 | ||
2189 | if (selected) { | |
2190 | ieee80211_set_channel(local, -1, selected->freq); | |
d6f2da5b | 2191 | if (!(ifsta->flags & IEEE80211_STA_SSID_SET)) |
f0706e82 JB |
2192 | ieee80211_sta_set_ssid(dev, selected->ssid, |
2193 | selected->ssid_len); | |
2194 | ieee80211_sta_set_bssid(dev, selected->bssid); | |
2195 | ieee80211_rx_bss_put(dev, selected); | |
2196 | ifsta->state = IEEE80211_AUTHENTICATE; | |
f0706e82 JB |
2197 | ieee80211_sta_reset_auth(dev, ifsta); |
2198 | return 0; | |
2199 | } else { | |
2200 | if (ifsta->state != IEEE80211_AUTHENTICATE) { | |
d6f2da5b | 2201 | if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) |
b9bf1e60 JL |
2202 | ieee80211_sta_start_scan(dev, NULL, 0); |
2203 | else | |
2204 | ieee80211_sta_start_scan(dev, ifsta->ssid, | |
2205 | ifsta->ssid_len); | |
f0706e82 JB |
2206 | ifsta->state = IEEE80211_AUTHENTICATE; |
2207 | set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request); | |
2208 | } else | |
2209 | ifsta->state = IEEE80211_DISABLED; | |
2210 | } | |
f0706e82 JB |
2211 | return -1; |
2212 | } | |
2213 | ||
2214 | static int ieee80211_sta_join_ibss(struct net_device *dev, | |
2215 | struct ieee80211_if_sta *ifsta, | |
2216 | struct ieee80211_sta_bss *bss) | |
2217 | { | |
2218 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2219 | int res, rates, i, j; | |
2220 | struct sk_buff *skb; | |
2221 | struct ieee80211_mgmt *mgmt; | |
2222 | struct ieee80211_tx_control control; | |
2223 | struct ieee80211_rate *rate; | |
2224 | struct ieee80211_hw_mode *mode; | |
2225 | struct rate_control_extra extra; | |
2226 | u8 *pos; | |
2227 | struct ieee80211_sub_if_data *sdata; | |
2228 | ||
2229 | /* Remove possible STA entries from other IBSS networks. */ | |
2230 | sta_info_flush(local, NULL); | |
2231 | ||
2232 | if (local->ops->reset_tsf) { | |
2233 | /* Reset own TSF to allow time synchronization work. */ | |
2234 | local->ops->reset_tsf(local_to_hw(local)); | |
2235 | } | |
2236 | memcpy(ifsta->bssid, bss->bssid, ETH_ALEN); | |
2237 | res = ieee80211_if_config(dev); | |
2238 | if (res) | |
2239 | return res; | |
2240 | ||
2241 | local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10; | |
2242 | ||
2243 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2244 | sdata->drop_unencrypted = bss->capability & | |
2245 | WLAN_CAPABILITY_PRIVACY ? 1 : 0; | |
2246 | ||
2247 | res = ieee80211_set_channel(local, -1, bss->freq); | |
2248 | ||
2249 | if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) { | |
2250 | printk(KERN_DEBUG "%s: IBSS not allowed on channel %d " | |
2251 | "(%d MHz)\n", dev->name, local->hw.conf.channel, | |
2252 | local->hw.conf.freq); | |
2253 | return -1; | |
2254 | } | |
2255 | ||
2256 | /* Set beacon template based on scan results */ | |
2257 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); | |
2258 | do { | |
2259 | if (!skb) | |
2260 | break; | |
2261 | ||
2262 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2263 | ||
2264 | mgmt = (struct ieee80211_mgmt *) | |
2265 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2266 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
2267 | mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2268 | IEEE80211_STYPE_BEACON); | |
2269 | memset(mgmt->da, 0xff, ETH_ALEN); | |
2270 | memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN); | |
2271 | memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN); | |
2272 | mgmt->u.beacon.beacon_int = | |
2273 | cpu_to_le16(local->hw.conf.beacon_int); | |
2274 | mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability); | |
2275 | ||
2276 | pos = skb_put(skb, 2 + ifsta->ssid_len); | |
2277 | *pos++ = WLAN_EID_SSID; | |
2278 | *pos++ = ifsta->ssid_len; | |
2279 | memcpy(pos, ifsta->ssid, ifsta->ssid_len); | |
2280 | ||
2281 | rates = bss->supp_rates_len; | |
2282 | if (rates > 8) | |
2283 | rates = 8; | |
2284 | pos = skb_put(skb, 2 + rates); | |
2285 | *pos++ = WLAN_EID_SUPP_RATES; | |
2286 | *pos++ = rates; | |
2287 | memcpy(pos, bss->supp_rates, rates); | |
2288 | ||
2289 | pos = skb_put(skb, 2 + 1); | |
2290 | *pos++ = WLAN_EID_DS_PARAMS; | |
2291 | *pos++ = 1; | |
2292 | *pos++ = bss->channel; | |
2293 | ||
2294 | pos = skb_put(skb, 2 + 2); | |
2295 | *pos++ = WLAN_EID_IBSS_PARAMS; | |
2296 | *pos++ = 2; | |
2297 | /* FIX: set ATIM window based on scan results */ | |
2298 | *pos++ = 0; | |
2299 | *pos++ = 0; | |
2300 | ||
2301 | if (bss->supp_rates_len > 8) { | |
2302 | rates = bss->supp_rates_len - 8; | |
2303 | pos = skb_put(skb, 2 + rates); | |
2304 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
2305 | *pos++ = rates; | |
2306 | memcpy(pos, &bss->supp_rates[8], rates); | |
2307 | } | |
2308 | ||
2309 | memset(&control, 0, sizeof(control)); | |
2310 | memset(&extra, 0, sizeof(extra)); | |
2311 | extra.mode = local->oper_hw_mode; | |
2312 | rate = rate_control_get_rate(local, dev, skb, &extra); | |
2313 | if (!rate) { | |
2314 | printk(KERN_DEBUG "%s: Failed to determine TX rate " | |
2315 | "for IBSS beacon\n", dev->name); | |
2316 | break; | |
2317 | } | |
13262ffd JS |
2318 | control.tx_rate = |
2319 | ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) && | |
2320 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
f0706e82 JB |
2321 | rate->val2 : rate->val; |
2322 | control.antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2323 | control.power_level = local->hw.conf.power_level; | |
2324 | control.flags |= IEEE80211_TXCTL_NO_ACK; | |
2325 | control.retry_limit = 1; | |
2326 | ||
2327 | ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC); | |
2328 | if (ifsta->probe_resp) { | |
2329 | mgmt = (struct ieee80211_mgmt *) | |
2330 | ifsta->probe_resp->data; | |
2331 | mgmt->frame_control = | |
2332 | IEEE80211_FC(IEEE80211_FTYPE_MGMT, | |
2333 | IEEE80211_STYPE_PROBE_RESP); | |
2334 | } else { | |
2335 | printk(KERN_DEBUG "%s: Could not allocate ProbeResp " | |
2336 | "template for IBSS\n", dev->name); | |
2337 | } | |
2338 | ||
2339 | if (local->ops->beacon_update && | |
2340 | local->ops->beacon_update(local_to_hw(local), | |
2341 | skb, &control) == 0) { | |
2342 | printk(KERN_DEBUG "%s: Configured IBSS beacon " | |
2343 | "template based on scan results\n", dev->name); | |
2344 | skb = NULL; | |
2345 | } | |
2346 | ||
2347 | rates = 0; | |
2348 | mode = local->oper_hw_mode; | |
2349 | for (i = 0; i < bss->supp_rates_len; i++) { | |
2350 | int bitrate = (bss->supp_rates[i] & 0x7f) * 5; | |
f0706e82 JB |
2351 | for (j = 0; j < mode->num_rates; j++) |
2352 | if (mode->rates[j].rate == bitrate) | |
2353 | rates |= BIT(j); | |
2354 | } | |
2355 | ifsta->supp_rates_bits = rates; | |
2356 | } while (0); | |
2357 | ||
2358 | if (skb) { | |
2359 | printk(KERN_DEBUG "%s: Failed to configure IBSS beacon " | |
2360 | "template\n", dev->name); | |
2361 | dev_kfree_skb(skb); | |
2362 | } | |
2363 | ||
2364 | ifsta->state = IEEE80211_IBSS_JOINED; | |
2365 | mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL); | |
2366 | ||
2367 | ieee80211_rx_bss_put(dev, bss); | |
2368 | ||
2369 | return res; | |
2370 | } | |
2371 | ||
2372 | ||
2373 | static int ieee80211_sta_create_ibss(struct net_device *dev, | |
2374 | struct ieee80211_if_sta *ifsta) | |
2375 | { | |
2376 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2377 | struct ieee80211_sta_bss *bss; | |
2378 | struct ieee80211_sub_if_data *sdata; | |
2379 | struct ieee80211_hw_mode *mode; | |
2380 | u8 bssid[ETH_ALEN], *pos; | |
2381 | int i; | |
0795af57 | 2382 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
2383 | |
2384 | #if 0 | |
2385 | /* Easier testing, use fixed BSSID. */ | |
2386 | memset(bssid, 0xfe, ETH_ALEN); | |
2387 | #else | |
2388 | /* Generate random, not broadcast, locally administered BSSID. Mix in | |
2389 | * own MAC address to make sure that devices that do not have proper | |
2390 | * random number generator get different BSSID. */ | |
2391 | get_random_bytes(bssid, ETH_ALEN); | |
2392 | for (i = 0; i < ETH_ALEN; i++) | |
2393 | bssid[i] ^= dev->dev_addr[i]; | |
2394 | bssid[0] &= ~0x01; | |
2395 | bssid[0] |= 0x02; | |
2396 | #endif | |
2397 | ||
0795af57 JP |
2398 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n", |
2399 | dev->name, print_mac(mac, bssid)); | |
f0706e82 JB |
2400 | |
2401 | bss = ieee80211_rx_bss_add(dev, bssid); | |
2402 | if (!bss) | |
2403 | return -ENOMEM; | |
2404 | ||
2405 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2406 | mode = local->oper_hw_mode; | |
2407 | ||
2408 | if (local->hw.conf.beacon_int == 0) | |
2409 | local->hw.conf.beacon_int = 100; | |
2410 | bss->beacon_int = local->hw.conf.beacon_int; | |
2411 | bss->hw_mode = local->hw.conf.phymode; | |
2412 | bss->channel = local->hw.conf.channel; | |
2413 | bss->freq = local->hw.conf.freq; | |
2414 | bss->last_update = jiffies; | |
2415 | bss->capability = WLAN_CAPABILITY_IBSS; | |
2416 | if (sdata->default_key) { | |
2417 | bss->capability |= WLAN_CAPABILITY_PRIVACY; | |
2418 | } else | |
2419 | sdata->drop_unencrypted = 0; | |
2420 | bss->supp_rates_len = mode->num_rates; | |
2421 | pos = bss->supp_rates; | |
2422 | for (i = 0; i < mode->num_rates; i++) { | |
2423 | int rate = mode->rates[i].rate; | |
f0706e82 JB |
2424 | *pos++ = (u8) (rate / 5); |
2425 | } | |
2426 | ||
2427 | return ieee80211_sta_join_ibss(dev, ifsta, bss); | |
2428 | } | |
2429 | ||
2430 | ||
2431 | static int ieee80211_sta_find_ibss(struct net_device *dev, | |
2432 | struct ieee80211_if_sta *ifsta) | |
2433 | { | |
2434 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2435 | struct ieee80211_sta_bss *bss; | |
2436 | int found = 0; | |
2437 | u8 bssid[ETH_ALEN]; | |
2438 | int active_ibss; | |
0795af57 JP |
2439 | DECLARE_MAC_BUF(mac); |
2440 | DECLARE_MAC_BUF(mac2); | |
f0706e82 JB |
2441 | |
2442 | if (ifsta->ssid_len == 0) | |
2443 | return -EINVAL; | |
2444 | ||
2445 | active_ibss = ieee80211_sta_active_ibss(dev); | |
2446 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2447 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", | |
2448 | dev->name, active_ibss); | |
2449 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2450 | spin_lock_bh(&local->sta_bss_lock); | |
2451 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
2452 | if (ifsta->ssid_len != bss->ssid_len || | |
2453 | memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0 | |
2454 | || !(bss->capability & WLAN_CAPABILITY_IBSS)) | |
2455 | continue; | |
2456 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2457 | printk(KERN_DEBUG " bssid=%s found\n", |
2458 | print_mac(mac, bss->bssid)); | |
f0706e82 JB |
2459 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2460 | memcpy(bssid, bss->bssid, ETH_ALEN); | |
2461 | found = 1; | |
2462 | if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0) | |
2463 | break; | |
2464 | } | |
2465 | spin_unlock_bh(&local->sta_bss_lock); | |
2466 | ||
2467 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
0795af57 JP |
2468 | printk(KERN_DEBUG " sta_find_ibss: selected %s current " |
2469 | "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid)); | |
f0706e82 JB |
2470 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
2471 | if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 && | |
2472 | (bss = ieee80211_rx_bss_get(dev, bssid))) { | |
0795af57 | 2473 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %s" |
f0706e82 | 2474 | " based on configured SSID\n", |
0795af57 | 2475 | dev->name, print_mac(mac, bssid)); |
f0706e82 JB |
2476 | return ieee80211_sta_join_ibss(dev, ifsta, bss); |
2477 | } | |
2478 | #ifdef CONFIG_MAC80211_IBSS_DEBUG | |
2479 | printk(KERN_DEBUG " did not try to join ibss\n"); | |
2480 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ | |
2481 | ||
2482 | /* Selected IBSS not found in current scan results - try to scan */ | |
2483 | if (ifsta->state == IEEE80211_IBSS_JOINED && | |
2484 | !ieee80211_sta_active_ibss(dev)) { | |
2485 | mod_timer(&ifsta->timer, jiffies + | |
2486 | IEEE80211_IBSS_MERGE_INTERVAL); | |
2487 | } else if (time_after(jiffies, local->last_scan_completed + | |
2488 | IEEE80211_SCAN_INTERVAL)) { | |
2489 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " | |
2490 | "join\n", dev->name); | |
2491 | return ieee80211_sta_req_scan(dev, ifsta->ssid, | |
2492 | ifsta->ssid_len); | |
2493 | } else if (ifsta->state != IEEE80211_IBSS_JOINED) { | |
2494 | int interval = IEEE80211_SCAN_INTERVAL; | |
2495 | ||
2496 | if (time_after(jiffies, ifsta->ibss_join_req + | |
2497 | IEEE80211_IBSS_JOIN_TIMEOUT)) { | |
d6f2da5b | 2498 | if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) && |
f0706e82 JB |
2499 | local->oper_channel->flag & IEEE80211_CHAN_W_IBSS) |
2500 | return ieee80211_sta_create_ibss(dev, ifsta); | |
d6f2da5b | 2501 | if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) { |
f0706e82 JB |
2502 | printk(KERN_DEBUG "%s: IBSS not allowed on the" |
2503 | " configured channel %d (%d MHz)\n", | |
2504 | dev->name, local->hw.conf.channel, | |
2505 | local->hw.conf.freq); | |
2506 | } | |
2507 | ||
2508 | /* No IBSS found - decrease scan interval and continue | |
2509 | * scanning. */ | |
2510 | interval = IEEE80211_SCAN_INTERVAL_SLOW; | |
2511 | } | |
2512 | ||
2513 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2514 | mod_timer(&ifsta->timer, jiffies + interval); | |
2515 | return 0; | |
2516 | } | |
2517 | ||
2518 | return 0; | |
2519 | } | |
2520 | ||
2521 | ||
2522 | int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len) | |
2523 | { | |
2524 | struct ieee80211_sub_if_data *sdata; | |
2525 | struct ieee80211_if_sta *ifsta; | |
2526 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2527 | ||
2528 | if (len > IEEE80211_MAX_SSID_LEN) | |
2529 | return -EINVAL; | |
2530 | ||
2531 | /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is | |
2532 | * not defined. */ | |
2533 | if (local->ops->conf_tx) { | |
2534 | struct ieee80211_tx_queue_params qparam; | |
2535 | int i; | |
2536 | ||
2537 | memset(&qparam, 0, sizeof(qparam)); | |
2538 | /* TODO: are these ok defaults for all hw_modes? */ | |
2539 | qparam.aifs = 2; | |
2540 | qparam.cw_min = | |
2541 | local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15; | |
2542 | qparam.cw_max = 1023; | |
2543 | qparam.burst_time = 0; | |
2544 | for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++) | |
2545 | { | |
2546 | local->ops->conf_tx(local_to_hw(local), | |
2547 | i + IEEE80211_TX_QUEUE_DATA0, | |
2548 | &qparam); | |
2549 | } | |
2550 | /* IBSS uses different parameters for Beacon sending */ | |
2551 | qparam.cw_min++; | |
2552 | qparam.cw_min *= 2; | |
2553 | qparam.cw_min--; | |
2554 | local->ops->conf_tx(local_to_hw(local), | |
2555 | IEEE80211_TX_QUEUE_BEACON, &qparam); | |
2556 | } | |
2557 | ||
2558 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2559 | ifsta = &sdata->u.sta; | |
2560 | ||
2561 | if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) | |
d6f2da5b | 2562 | ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET; |
f0706e82 JB |
2563 | memcpy(ifsta->ssid, ssid, len); |
2564 | memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len); | |
2565 | ifsta->ssid_len = len; | |
2566 | ||
d6f2da5b JS |
2567 | if (len) |
2568 | ifsta->flags |= IEEE80211_STA_SSID_SET; | |
2569 | else | |
2570 | ifsta->flags &= ~IEEE80211_STA_SSID_SET; | |
2571 | if (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
2572 | !(ifsta->flags & IEEE80211_STA_BSSID_SET)) { | |
f0706e82 JB |
2573 | ifsta->ibss_join_req = jiffies; |
2574 | ifsta->state = IEEE80211_IBSS_SEARCH; | |
2575 | return ieee80211_sta_find_ibss(dev, ifsta); | |
2576 | } | |
2577 | return 0; | |
2578 | } | |
2579 | ||
2580 | ||
2581 | int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len) | |
2582 | { | |
2583 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2584 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2585 | memcpy(ssid, ifsta->ssid, ifsta->ssid_len); | |
2586 | *len = ifsta->ssid_len; | |
2587 | return 0; | |
2588 | } | |
2589 | ||
2590 | ||
2591 | int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid) | |
2592 | { | |
2593 | struct ieee80211_sub_if_data *sdata; | |
2594 | struct ieee80211_if_sta *ifsta; | |
2595 | int res; | |
2596 | ||
2597 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2598 | ifsta = &sdata->u.sta; | |
2599 | ||
2600 | if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) { | |
2601 | memcpy(ifsta->bssid, bssid, ETH_ALEN); | |
2602 | res = ieee80211_if_config(dev); | |
2603 | if (res) { | |
2604 | printk(KERN_DEBUG "%s: Failed to config new BSSID to " | |
2605 | "the low-level driver\n", dev->name); | |
2606 | return res; | |
2607 | } | |
2608 | } | |
2609 | ||
d6f2da5b JS |
2610 | if (is_valid_ether_addr(bssid)) |
2611 | ifsta->flags |= IEEE80211_STA_BSSID_SET; | |
f0706e82 | 2612 | else |
d6f2da5b JS |
2613 | ifsta->flags &= ~IEEE80211_STA_BSSID_SET; |
2614 | ||
f0706e82 JB |
2615 | return 0; |
2616 | } | |
2617 | ||
2618 | ||
2619 | static void ieee80211_send_nullfunc(struct ieee80211_local *local, | |
2620 | struct ieee80211_sub_if_data *sdata, | |
2621 | int powersave) | |
2622 | { | |
2623 | struct sk_buff *skb; | |
2624 | struct ieee80211_hdr *nullfunc; | |
2625 | u16 fc; | |
2626 | ||
2627 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24); | |
2628 | if (!skb) { | |
2629 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2630 | "frame\n", sdata->dev->name); | |
2631 | return; | |
2632 | } | |
2633 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2634 | ||
2635 | nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24); | |
2636 | memset(nullfunc, 0, 24); | |
2637 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | | |
2638 | IEEE80211_FCTL_TODS; | |
2639 | if (powersave) | |
2640 | fc |= IEEE80211_FCTL_PM; | |
2641 | nullfunc->frame_control = cpu_to_le16(fc); | |
2642 | memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN); | |
2643 | memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN); | |
2644 | memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN); | |
2645 | ||
2646 | ieee80211_sta_tx(sdata->dev, skb, 0); | |
2647 | } | |
2648 | ||
2649 | ||
2650 | void ieee80211_scan_completed(struct ieee80211_hw *hw) | |
2651 | { | |
2652 | struct ieee80211_local *local = hw_to_local(hw); | |
2653 | struct net_device *dev = local->scan_dev; | |
2654 | struct ieee80211_sub_if_data *sdata; | |
2655 | union iwreq_data wrqu; | |
2656 | ||
2657 | local->last_scan_completed = jiffies; | |
2658 | wmb(); | |
2659 | local->sta_scanning = 0; | |
2660 | ||
2661 | if (ieee80211_hw_config(local)) | |
2662 | printk(KERN_DEBUG "%s: failed to restore operational" | |
2663 | "channel after scan\n", dev->name); | |
2664 | ||
4150c572 JB |
2665 | |
2666 | netif_tx_lock_bh(local->mdev); | |
2667 | local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC; | |
2668 | local->ops->configure_filter(local_to_hw(local), | |
2669 | FIF_BCN_PRBRESP_PROMISC, | |
2670 | &local->filter_flags, | |
2671 | local->mdev->mc_count, | |
2672 | local->mdev->mc_list); | |
2673 | ||
2674 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 JB |
2675 | |
2676 | memset(&wrqu, 0, sizeof(wrqu)); | |
2677 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
2678 | ||
2679 | read_lock(&local->sub_if_lock); | |
2680 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2681 | |
2682 | /* No need to wake the master device. */ | |
2683 | if (sdata->dev == local->mdev) | |
2684 | continue; | |
2685 | ||
f0706e82 | 2686 | if (sdata->type == IEEE80211_IF_TYPE_STA) { |
d6f2da5b | 2687 | if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED) |
f0706e82 JB |
2688 | ieee80211_send_nullfunc(local, sdata, 0); |
2689 | ieee80211_sta_timer((unsigned long)sdata); | |
2690 | } | |
14042cbe | 2691 | |
f0706e82 JB |
2692 | netif_wake_queue(sdata->dev); |
2693 | } | |
2694 | read_unlock(&local->sub_if_lock); | |
2695 | ||
2696 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2697 | if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2698 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
d6f2da5b | 2699 | if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) || |
f0706e82 JB |
2700 | (!ifsta->state == IEEE80211_IBSS_JOINED && |
2701 | !ieee80211_sta_active_ibss(dev))) | |
2702 | ieee80211_sta_find_ibss(dev, ifsta); | |
2703 | } | |
2704 | } | |
2705 | EXPORT_SYMBOL(ieee80211_scan_completed); | |
2706 | ||
2707 | void ieee80211_sta_scan_work(struct work_struct *work) | |
2708 | { | |
2709 | struct ieee80211_local *local = | |
2710 | container_of(work, struct ieee80211_local, scan_work.work); | |
2711 | struct net_device *dev = local->scan_dev; | |
2712 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2713 | struct ieee80211_hw_mode *mode; | |
2714 | struct ieee80211_channel *chan; | |
2715 | int skip; | |
2716 | unsigned long next_delay = 0; | |
2717 | ||
2718 | if (!local->sta_scanning) | |
2719 | return; | |
2720 | ||
2721 | switch (local->scan_state) { | |
2722 | case SCAN_SET_CHANNEL: | |
2723 | mode = local->scan_hw_mode; | |
2724 | if (local->scan_hw_mode->list.next == &local->modes_list && | |
2725 | local->scan_channel_idx >= mode->num_channels) { | |
2726 | ieee80211_scan_completed(local_to_hw(local)); | |
2727 | return; | |
2728 | } | |
2729 | skip = !(local->enabled_modes & (1 << mode->mode)); | |
2730 | chan = &mode->channels[local->scan_channel_idx]; | |
2731 | if (!(chan->flag & IEEE80211_CHAN_W_SCAN) || | |
2732 | (sdata->type == IEEE80211_IF_TYPE_IBSS && | |
2733 | !(chan->flag & IEEE80211_CHAN_W_IBSS)) || | |
2734 | (local->hw_modes & local->enabled_modes & | |
2735 | (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B)) | |
2736 | skip = 1; | |
2737 | ||
2738 | if (!skip) { | |
2739 | #if 0 | |
2740 | printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n", | |
2741 | dev->name, chan->chan, chan->freq); | |
2742 | #endif | |
2743 | ||
2744 | local->scan_channel = chan; | |
2745 | if (ieee80211_hw_config(local)) { | |
2746 | printk(KERN_DEBUG "%s: failed to set channel " | |
2747 | "%d (%d MHz) for scan\n", dev->name, | |
2748 | chan->chan, chan->freq); | |
2749 | skip = 1; | |
2750 | } | |
2751 | } | |
2752 | ||
2753 | local->scan_channel_idx++; | |
2754 | if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) { | |
2755 | if (local->scan_hw_mode->list.next != &local->modes_list) { | |
2756 | local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next, | |
2757 | struct ieee80211_hw_mode, | |
2758 | list); | |
2759 | local->scan_channel_idx = 0; | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | if (skip) | |
2764 | break; | |
2765 | ||
2766 | next_delay = IEEE80211_PROBE_DELAY + | |
2767 | usecs_to_jiffies(local->hw.channel_change_time); | |
2768 | local->scan_state = SCAN_SEND_PROBE; | |
2769 | break; | |
2770 | case SCAN_SEND_PROBE: | |
2771 | if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) { | |
2772 | ieee80211_send_probe_req(dev, NULL, local->scan_ssid, | |
2773 | local->scan_ssid_len); | |
2774 | next_delay = IEEE80211_CHANNEL_TIME; | |
2775 | } else | |
2776 | next_delay = IEEE80211_PASSIVE_CHANNEL_TIME; | |
2777 | local->scan_state = SCAN_SET_CHANNEL; | |
2778 | break; | |
2779 | } | |
2780 | ||
2781 | if (local->sta_scanning) | |
2782 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2783 | next_delay); | |
2784 | } | |
2785 | ||
2786 | ||
2787 | static int ieee80211_sta_start_scan(struct net_device *dev, | |
2788 | u8 *ssid, size_t ssid_len) | |
2789 | { | |
2790 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2791 | struct ieee80211_sub_if_data *sdata; | |
2792 | ||
2793 | if (ssid_len > IEEE80211_MAX_SSID_LEN) | |
2794 | return -EINVAL; | |
2795 | ||
2796 | /* MLME-SCAN.request (page 118) page 144 (11.1.3.1) | |
2797 | * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS | |
2798 | * BSSID: MACAddress | |
2799 | * SSID | |
2800 | * ScanType: ACTIVE, PASSIVE | |
2801 | * ProbeDelay: delay (in microseconds) to be used prior to transmitting | |
2802 | * a Probe frame during active scanning | |
2803 | * ChannelList | |
2804 | * MinChannelTime (>= ProbeDelay), in TU | |
2805 | * MaxChannelTime: (>= MinChannelTime), in TU | |
2806 | */ | |
2807 | ||
2808 | /* MLME-SCAN.confirm | |
2809 | * BSSDescriptionSet | |
2810 | * ResultCode: SUCCESS, INVALID_PARAMETERS | |
2811 | */ | |
2812 | ||
2813 | if (local->sta_scanning) { | |
2814 | if (local->scan_dev == dev) | |
2815 | return 0; | |
2816 | return -EBUSY; | |
2817 | } | |
2818 | ||
2819 | if (local->ops->hw_scan) { | |
2820 | int rc = local->ops->hw_scan(local_to_hw(local), | |
2821 | ssid, ssid_len); | |
2822 | if (!rc) { | |
2823 | local->sta_scanning = 1; | |
2824 | local->scan_dev = dev; | |
2825 | } | |
2826 | return rc; | |
2827 | } | |
2828 | ||
2829 | local->sta_scanning = 1; | |
2830 | ||
2831 | read_lock(&local->sub_if_lock); | |
2832 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
14042cbe MN |
2833 | |
2834 | /* Don't stop the master interface, otherwise we can't transmit | |
2835 | * probes! */ | |
2836 | if (sdata->dev == local->mdev) | |
2837 | continue; | |
2838 | ||
f0706e82 JB |
2839 | netif_stop_queue(sdata->dev); |
2840 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
d6f2da5b | 2841 | (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
2842 | ieee80211_send_nullfunc(local, sdata, 1); |
2843 | } | |
2844 | read_unlock(&local->sub_if_lock); | |
2845 | ||
2846 | if (ssid) { | |
2847 | local->scan_ssid_len = ssid_len; | |
2848 | memcpy(local->scan_ssid, ssid, ssid_len); | |
2849 | } else | |
2850 | local->scan_ssid_len = 0; | |
2851 | local->scan_state = SCAN_SET_CHANNEL; | |
2852 | local->scan_hw_mode = list_entry(local->modes_list.next, | |
2853 | struct ieee80211_hw_mode, | |
2854 | list); | |
2855 | local->scan_channel_idx = 0; | |
2856 | local->scan_dev = dev; | |
2857 | ||
4150c572 JB |
2858 | netif_tx_lock_bh(local->mdev); |
2859 | local->filter_flags |= FIF_BCN_PRBRESP_PROMISC; | |
2860 | local->ops->configure_filter(local_to_hw(local), | |
2861 | FIF_BCN_PRBRESP_PROMISC, | |
2862 | &local->filter_flags, | |
2863 | local->mdev->mc_count, | |
2864 | local->mdev->mc_list); | |
2865 | netif_tx_unlock_bh(local->mdev); | |
f0706e82 JB |
2866 | |
2867 | /* TODO: start scan as soon as all nullfunc frames are ACKed */ | |
2868 | queue_delayed_work(local->hw.workqueue, &local->scan_work, | |
2869 | IEEE80211_CHANNEL_TIME); | |
2870 | ||
2871 | return 0; | |
2872 | } | |
2873 | ||
2874 | ||
2875 | int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len) | |
2876 | { | |
2877 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2878 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
2879 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2880 | ||
2881 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2882 | return ieee80211_sta_start_scan(dev, ssid, ssid_len); | |
2883 | ||
2884 | if (local->sta_scanning) { | |
2885 | if (local->scan_dev == dev) | |
2886 | return 0; | |
2887 | return -EBUSY; | |
2888 | } | |
2889 | ||
2890 | set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request); | |
2891 | queue_work(local->hw.workqueue, &ifsta->work); | |
2892 | return 0; | |
2893 | } | |
2894 | ||
2895 | static char * | |
2896 | ieee80211_sta_scan_result(struct net_device *dev, | |
2897 | struct ieee80211_sta_bss *bss, | |
2898 | char *current_ev, char *end_buf) | |
2899 | { | |
2900 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2901 | struct iw_event iwe; | |
2902 | ||
2903 | if (time_after(jiffies, | |
2904 | bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2905 | return current_ev; | |
2906 | ||
2907 | if (!(local->enabled_modes & (1 << bss->hw_mode))) | |
2908 | return current_ev; | |
2909 | ||
2910 | if (local->scan_flags & IEEE80211_SCAN_WPA_ONLY && | |
2911 | !bss->wpa_ie && !bss->rsn_ie) | |
2912 | return current_ev; | |
2913 | ||
2914 | if (local->scan_flags & IEEE80211_SCAN_MATCH_SSID && | |
2915 | (local->scan_ssid_len != bss->ssid_len || | |
2916 | memcmp(local->scan_ssid, bss->ssid, bss->ssid_len) != 0)) | |
2917 | return current_ev; | |
2918 | ||
2919 | memset(&iwe, 0, sizeof(iwe)); | |
2920 | iwe.cmd = SIOCGIWAP; | |
2921 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
2922 | memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN); | |
2923 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2924 | IW_EV_ADDR_LEN); | |
2925 | ||
2926 | memset(&iwe, 0, sizeof(iwe)); | |
2927 | iwe.cmd = SIOCGIWESSID; | |
2928 | iwe.u.data.length = bss->ssid_len; | |
2929 | iwe.u.data.flags = 1; | |
2930 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2931 | bss->ssid); | |
2932 | ||
2933 | if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) { | |
2934 | memset(&iwe, 0, sizeof(iwe)); | |
2935 | iwe.cmd = SIOCGIWMODE; | |
2936 | if (bss->capability & WLAN_CAPABILITY_ESS) | |
2937 | iwe.u.mode = IW_MODE_MASTER; | |
2938 | else | |
2939 | iwe.u.mode = IW_MODE_ADHOC; | |
2940 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2941 | IW_EV_UINT_LEN); | |
2942 | } | |
2943 | ||
2944 | memset(&iwe, 0, sizeof(iwe)); | |
2945 | iwe.cmd = SIOCGIWFREQ; | |
2946 | iwe.u.freq.m = bss->channel; | |
2947 | iwe.u.freq.e = 0; | |
2948 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2949 | IW_EV_FREQ_LEN); | |
2950 | iwe.u.freq.m = bss->freq * 100000; | |
2951 | iwe.u.freq.e = 1; | |
2952 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2953 | IW_EV_FREQ_LEN); | |
2954 | ||
2955 | memset(&iwe, 0, sizeof(iwe)); | |
2956 | iwe.cmd = IWEVQUAL; | |
2957 | iwe.u.qual.qual = bss->signal; | |
2958 | iwe.u.qual.level = bss->rssi; | |
2959 | iwe.u.qual.noise = bss->noise; | |
2960 | iwe.u.qual.updated = local->wstats_flags; | |
2961 | current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, | |
2962 | IW_EV_QUAL_LEN); | |
2963 | ||
2964 | memset(&iwe, 0, sizeof(iwe)); | |
2965 | iwe.cmd = SIOCGIWENCODE; | |
2966 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) | |
2967 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
2968 | else | |
2969 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
2970 | iwe.u.data.length = 0; | |
2971 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, ""); | |
2972 | ||
2973 | if (bss && bss->wpa_ie) { | |
2974 | memset(&iwe, 0, sizeof(iwe)); | |
2975 | iwe.cmd = IWEVGENIE; | |
2976 | iwe.u.data.length = bss->wpa_ie_len; | |
2977 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2978 | bss->wpa_ie); | |
2979 | } | |
2980 | ||
2981 | if (bss && bss->rsn_ie) { | |
2982 | memset(&iwe, 0, sizeof(iwe)); | |
2983 | iwe.cmd = IWEVGENIE; | |
2984 | iwe.u.data.length = bss->rsn_ie_len; | |
2985 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
2986 | bss->rsn_ie); | |
2987 | } | |
2988 | ||
2989 | if (bss && bss->supp_rates_len > 0) { | |
2990 | /* display all supported rates in readable format */ | |
2991 | char *p = current_ev + IW_EV_LCP_LEN; | |
2992 | int i; | |
2993 | ||
2994 | memset(&iwe, 0, sizeof(iwe)); | |
2995 | iwe.cmd = SIOCGIWRATE; | |
2996 | /* Those two flags are ignored... */ | |
2997 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
2998 | ||
2999 | for (i = 0; i < bss->supp_rates_len; i++) { | |
3000 | iwe.u.bitrate.value = ((bss->supp_rates[i] & | |
3001 | 0x7f) * 500000); | |
3002 | p = iwe_stream_add_value(current_ev, p, | |
3003 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
3004 | } | |
3005 | current_ev = p; | |
3006 | } | |
3007 | ||
3008 | if (bss) { | |
3009 | char *buf; | |
3010 | buf = kmalloc(30, GFP_ATOMIC); | |
3011 | if (buf) { | |
3012 | memset(&iwe, 0, sizeof(iwe)); | |
3013 | iwe.cmd = IWEVCUSTOM; | |
3014 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp)); | |
3015 | iwe.u.data.length = strlen(buf); | |
3016 | current_ev = iwe_stream_add_point(current_ev, end_buf, | |
3017 | &iwe, buf); | |
3018 | kfree(buf); | |
3019 | } | |
3020 | } | |
3021 | ||
3022 | do { | |
3023 | char *buf; | |
3024 | ||
3025 | if (!(local->scan_flags & IEEE80211_SCAN_EXTRA_INFO)) | |
3026 | break; | |
3027 | ||
3028 | buf = kmalloc(100, GFP_ATOMIC); | |
3029 | if (!buf) | |
3030 | break; | |
3031 | ||
3032 | memset(&iwe, 0, sizeof(iwe)); | |
3033 | iwe.cmd = IWEVCUSTOM; | |
3034 | sprintf(buf, "bcn_int=%d", bss->beacon_int); | |
3035 | iwe.u.data.length = strlen(buf); | |
3036 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3037 | buf); | |
3038 | ||
3039 | memset(&iwe, 0, sizeof(iwe)); | |
3040 | iwe.cmd = IWEVCUSTOM; | |
3041 | sprintf(buf, "capab=0x%04x", bss->capability); | |
3042 | iwe.u.data.length = strlen(buf); | |
3043 | current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, | |
3044 | buf); | |
3045 | ||
3046 | kfree(buf); | |
3047 | break; | |
3048 | } while (0); | |
3049 | ||
3050 | return current_ev; | |
3051 | } | |
3052 | ||
3053 | ||
3054 | int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len) | |
3055 | { | |
3056 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3057 | char *current_ev = buf; | |
3058 | char *end_buf = buf + len; | |
3059 | struct ieee80211_sta_bss *bss; | |
3060 | ||
3061 | spin_lock_bh(&local->sta_bss_lock); | |
3062 | list_for_each_entry(bss, &local->sta_bss_list, list) { | |
3063 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
3064 | spin_unlock_bh(&local->sta_bss_lock); | |
3065 | return -E2BIG; | |
3066 | } | |
3067 | current_ev = ieee80211_sta_scan_result(dev, bss, current_ev, | |
3068 | end_buf); | |
3069 | } | |
3070 | spin_unlock_bh(&local->sta_bss_lock); | |
3071 | return current_ev - buf; | |
3072 | } | |
3073 | ||
3074 | ||
3075 | int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len) | |
3076 | { | |
3077 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3078 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3079 | kfree(ifsta->extra_ie); | |
3080 | if (len == 0) { | |
3081 | ifsta->extra_ie = NULL; | |
3082 | ifsta->extra_ie_len = 0; | |
3083 | return 0; | |
3084 | } | |
3085 | ifsta->extra_ie = kmalloc(len, GFP_KERNEL); | |
3086 | if (!ifsta->extra_ie) { | |
3087 | ifsta->extra_ie_len = 0; | |
3088 | return -ENOMEM; | |
3089 | } | |
3090 | memcpy(ifsta->extra_ie, ie, len); | |
3091 | ifsta->extra_ie_len = len; | |
3092 | return 0; | |
3093 | } | |
3094 | ||
3095 | ||
3096 | struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev, | |
3097 | struct sk_buff *skb, u8 *bssid, | |
3098 | u8 *addr) | |
3099 | { | |
3100 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3101 | struct sta_info *sta; | |
91fa558b | 3102 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0795af57 | 3103 | DECLARE_MAC_BUF(mac); |
f0706e82 JB |
3104 | |
3105 | /* TODO: Could consider removing the least recently used entry and | |
3106 | * allow new one to be added. */ | |
3107 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { | |
3108 | if (net_ratelimit()) { | |
3109 | printk(KERN_DEBUG "%s: No room for a new IBSS STA " | |
0795af57 | 3110 | "entry %s\n", dev->name, print_mac(mac, addr)); |
f0706e82 JB |
3111 | } |
3112 | return NULL; | |
3113 | } | |
3114 | ||
0795af57 | 3115 | printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n", |
dd1cd4c6 | 3116 | wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name); |
f0706e82 JB |
3117 | |
3118 | sta = sta_info_add(local, dev, addr, GFP_ATOMIC); | |
3119 | if (!sta) | |
3120 | return NULL; | |
3121 | ||
3122 | sta->supp_rates = sdata->u.sta.supp_rates_bits; | |
3123 | ||
3124 | rate_control_rate_init(sta, local); | |
3125 | ||
3126 | return sta; /* caller will call sta_info_put() */ | |
3127 | } | |
3128 | ||
3129 | ||
3130 | int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason) | |
3131 | { | |
3132 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3133 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3134 | ||
3135 | printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n", | |
3136 | dev->name, reason); | |
3137 | ||
3138 | if (sdata->type != IEEE80211_IF_TYPE_STA && | |
3139 | sdata->type != IEEE80211_IF_TYPE_IBSS) | |
3140 | return -EINVAL; | |
3141 | ||
3142 | ieee80211_send_deauth(dev, ifsta, reason); | |
3143 | ieee80211_set_disassoc(dev, ifsta, 1); | |
3144 | return 0; | |
3145 | } | |
3146 | ||
3147 | ||
3148 | int ieee80211_sta_disassociate(struct net_device *dev, u16 reason) | |
3149 | { | |
3150 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3151 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
3152 | ||
3153 | printk(KERN_DEBUG "%s: disassociate(reason=%d)\n", | |
3154 | dev->name, reason); | |
3155 | ||
3156 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
3157 | return -EINVAL; | |
3158 | ||
d6f2da5b | 3159 | if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED)) |
f0706e82 JB |
3160 | return -1; |
3161 | ||
3162 | ieee80211_send_disassoc(dev, ifsta, reason); | |
3163 | ieee80211_set_disassoc(dev, ifsta, 0); | |
3164 | return 0; | |
3165 | } |