1 /*
2 * mac80211 configuration hooks for cfg80211
3 *
4 * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * This file is GPLv2 as found in COPYING.
7 */
8
9 #include <linux/ieee80211.h>
10 #include <linux/nl80211.h>
11 #include <linux/rtnetlink.h>
12 #include <net/net_namespace.h>
13 #include <linux/rcupdate.h>
14 #include <net/cfg80211.h>
15 #include "ieee80211_i.h"
16 #include "cfg.h"
17 #include "rate.h"
18 #include "mesh.h"
19
nl80211_type_check(enum nl80211_iftype type)20 static bool nl80211_type_check(enum nl80211_iftype type)
21 {
22 switch (type) {
23 case NL80211_IFTYPE_ADHOC:
24 case NL80211_IFTYPE_STATION:
25 case NL80211_IFTYPE_MONITOR:
26 #ifdef CONFIG_MAC80211_MESH
27 case NL80211_IFTYPE_MESH_POINT:
28 #endif
29 case NL80211_IFTYPE_AP:
30 case NL80211_IFTYPE_AP_VLAN:
31 case NL80211_IFTYPE_WDS:
32 return true;
33 default:
34 return false;
35 }
36 }
37
ieee80211_add_iface(struct wiphy * wiphy,char * name,enum nl80211_iftype type,u32 * flags,struct vif_params * params)38 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
39 enum nl80211_iftype type, u32 *flags,
40 struct vif_params *params)
41 {
42 struct ieee80211_local *local = wiphy_priv(wiphy);
43 struct net_device *dev;
44 struct ieee80211_sub_if_data *sdata;
45 int err;
46
47 if (!nl80211_type_check(type))
48 return -EINVAL;
49
50 err = ieee80211_if_add(local, name, &dev, type, params);
51 if (err || type != NL80211_IFTYPE_MONITOR || !flags)
52 return err;
53
54 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
55 sdata->u.mntr_flags = *flags;
56 return 0;
57 }
58
ieee80211_del_iface(struct wiphy * wiphy,int ifindex)59 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
60 {
61 struct net_device *dev;
62 struct ieee80211_sub_if_data *sdata;
63
64 /* we're under RTNL */
65 dev = __dev_get_by_index(&init_net, ifindex);
66 if (!dev)
67 return -ENODEV;
68
69 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
70
71 ieee80211_if_remove(sdata);
72
73 return 0;
74 }
75
ieee80211_change_iface(struct wiphy * wiphy,int ifindex,enum nl80211_iftype type,u32 * flags,struct vif_params * params)76 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
77 enum nl80211_iftype type, u32 *flags,
78 struct vif_params *params)
79 {
80 struct net_device *dev;
81 struct ieee80211_sub_if_data *sdata;
82 int ret;
83
84 /* we're under RTNL */
85 dev = __dev_get_by_index(&init_net, ifindex);
86 if (!dev)
87 return -ENODEV;
88
89 if (!nl80211_type_check(type))
90 return -EINVAL;
91
92 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
93
94 ret = ieee80211_if_change_type(sdata, type);
95 if (ret)
96 return ret;
97
98 if (netif_running(sdata->dev))
99 return -EBUSY;
100
101 if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
102 ieee80211_sdata_set_mesh_id(sdata,
103 params->mesh_id_len,
104 params->mesh_id);
105
106 if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags)
107 return 0;
108
109 sdata->u.mntr_flags = *flags;
110 return 0;
111 }
112
ieee80211_add_key(struct wiphy * wiphy,struct net_device * dev,u8 key_idx,u8 * mac_addr,struct key_params * params)113 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
114 u8 key_idx, u8 *mac_addr,
115 struct key_params *params)
116 {
117 struct ieee80211_sub_if_data *sdata;
118 struct sta_info *sta = NULL;
119 enum ieee80211_key_alg alg;
120 struct ieee80211_key *key;
121 int err;
122
123 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
124
125 switch (params->cipher) {
126 case WLAN_CIPHER_SUITE_WEP40:
127 case WLAN_CIPHER_SUITE_WEP104:
128 alg = ALG_WEP;
129 break;
130 case WLAN_CIPHER_SUITE_TKIP:
131 alg = ALG_TKIP;
132 break;
133 case WLAN_CIPHER_SUITE_CCMP:
134 alg = ALG_CCMP;
135 break;
136 default:
137 return -EINVAL;
138 }
139
140 key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
141 if (!key)
142 return -ENOMEM;
143
144 rcu_read_lock();
145
146 if (mac_addr) {
147 sta = sta_info_get(sdata->local, mac_addr);
148 if (!sta) {
149 ieee80211_key_free(key);
150 err = -ENOENT;
151 goto out_unlock;
152 }
153 }
154
155 ieee80211_key_link(key, sdata, sta);
156
157 err = 0;
158 out_unlock:
159 rcu_read_unlock();
160
161 return err;
162 }
163
ieee80211_del_key(struct wiphy * wiphy,struct net_device * dev,u8 key_idx,u8 * mac_addr)164 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
165 u8 key_idx, u8 *mac_addr)
166 {
167 struct ieee80211_sub_if_data *sdata;
168 struct sta_info *sta;
169 int ret;
170
171 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
172
173 rcu_read_lock();
174
175 if (mac_addr) {
176 ret = -ENOENT;
177
178 sta = sta_info_get(sdata->local, mac_addr);
179 if (!sta)
180 goto out_unlock;
181
182 if (sta->key) {
183 ieee80211_key_free(sta->key);
184 WARN_ON(sta->key);
185 ret = 0;
186 }
187
188 goto out_unlock;
189 }
190
191 if (!sdata->keys[key_idx]) {
192 ret = -ENOENT;
193 goto out_unlock;
194 }
195
196 ieee80211_key_free(sdata->keys[key_idx]);
197 WARN_ON(sdata->keys[key_idx]);
198
199 ret = 0;
200 out_unlock:
201 rcu_read_unlock();
202
203 return ret;
204 }
205
ieee80211_get_key(struct wiphy * wiphy,struct net_device * dev,u8 key_idx,u8 * mac_addr,void * cookie,void (* callback)(void * cookie,struct key_params * params))206 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
207 u8 key_idx, u8 *mac_addr, void *cookie,
208 void (*callback)(void *cookie,
209 struct key_params *params))
210 {
211 struct ieee80211_sub_if_data *sdata;
212 struct sta_info *sta = NULL;
213 u8 seq[6] = {0};
214 struct key_params params;
215 struct ieee80211_key *key;
216 u32 iv32;
217 u16 iv16;
218 int err = -ENOENT;
219
220 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
221
222 rcu_read_lock();
223
224 if (mac_addr) {
225 sta = sta_info_get(sdata->local, mac_addr);
226 if (!sta)
227 goto out;
228
229 key = sta->key;
230 } else
231 key = sdata->keys[key_idx];
232
233 if (!key)
234 goto out;
235
236 memset(¶ms, 0, sizeof(params));
237
238 switch (key->conf.alg) {
239 case ALG_TKIP:
240 params.cipher = WLAN_CIPHER_SUITE_TKIP;
241
242 iv32 = key->u.tkip.tx.iv32;
243 iv16 = key->u.tkip.tx.iv16;
244
245 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
246 sdata->local->ops->get_tkip_seq)
247 sdata->local->ops->get_tkip_seq(
248 local_to_hw(sdata->local),
249 key->conf.hw_key_idx,
250 &iv32, &iv16);
251
252 seq[0] = iv16 & 0xff;
253 seq[1] = (iv16 >> 8) & 0xff;
254 seq[2] = iv32 & 0xff;
255 seq[3] = (iv32 >> 8) & 0xff;
256 seq[4] = (iv32 >> 16) & 0xff;
257 seq[5] = (iv32 >> 24) & 0xff;
258 params.seq = seq;
259 params.seq_len = 6;
260 break;
261 case ALG_CCMP:
262 params.cipher = WLAN_CIPHER_SUITE_CCMP;
263 seq[0] = key->u.ccmp.tx_pn[5];
264 seq[1] = key->u.ccmp.tx_pn[4];
265 seq[2] = key->u.ccmp.tx_pn[3];
266 seq[3] = key->u.ccmp.tx_pn[2];
267 seq[4] = key->u.ccmp.tx_pn[1];
268 seq[5] = key->u.ccmp.tx_pn[0];
269 params.seq = seq;
270 params.seq_len = 6;
271 break;
272 case ALG_WEP:
273 if (key->conf.keylen == 5)
274 params.cipher = WLAN_CIPHER_SUITE_WEP40;
275 else
276 params.cipher = WLAN_CIPHER_SUITE_WEP104;
277 break;
278 }
279
280 params.key = key->conf.key;
281 params.key_len = key->conf.keylen;
282
283 callback(cookie, ¶ms);
284 err = 0;
285
286 out:
287 rcu_read_unlock();
288 return err;
289 }
290
ieee80211_config_default_key(struct wiphy * wiphy,struct net_device * dev,u8 key_idx)291 static int ieee80211_config_default_key(struct wiphy *wiphy,
292 struct net_device *dev,
293 u8 key_idx)
294 {
295 struct ieee80211_sub_if_data *sdata;
296
297 rcu_read_lock();
298
299 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
300 ieee80211_set_default_key(sdata, key_idx);
301
302 rcu_read_unlock();
303
304 return 0;
305 }
306
sta_set_sinfo(struct sta_info * sta,struct station_info * sinfo)307 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
308 {
309 struct ieee80211_sub_if_data *sdata = sta->sdata;
310
311 sinfo->filled = STATION_INFO_INACTIVE_TIME |
312 STATION_INFO_RX_BYTES |
313 STATION_INFO_TX_BYTES |
314 STATION_INFO_TX_BITRATE;
315
316 sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
317 sinfo->rx_bytes = sta->rx_bytes;
318 sinfo->tx_bytes = sta->tx_bytes;
319
320 if (sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
321 sinfo->filled |= STATION_INFO_SIGNAL;
322 sinfo->signal = (s8)sta->last_signal;
323 }
324
325 sinfo->txrate.flags = 0;
326 if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
327 sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
328 if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
329 sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
330 if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
331 sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
332
333 if (!(sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)) {
334 struct ieee80211_supported_band *sband;
335 sband = sta->local->hw.wiphy->bands[
336 sta->local->hw.conf.channel->band];
337 sinfo->txrate.legacy =
338 sband->bitrates[sta->last_tx_rate.idx].bitrate;
339 } else
340 sinfo->txrate.mcs = sta->last_tx_rate.idx;
341
342 if (ieee80211_vif_is_mesh(&sdata->vif)) {
343 #ifdef CONFIG_MAC80211_MESH
344 sinfo->filled |= STATION_INFO_LLID |
345 STATION_INFO_PLID |
346 STATION_INFO_PLINK_STATE;
347
348 sinfo->llid = le16_to_cpu(sta->llid);
349 sinfo->plid = le16_to_cpu(sta->plid);
350 sinfo->plink_state = sta->plink_state;
351 #endif
352 }
353 }
354
355
ieee80211_dump_station(struct wiphy * wiphy,struct net_device * dev,int idx,u8 * mac,struct station_info * sinfo)356 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
357 int idx, u8 *mac, struct station_info *sinfo)
358 {
359 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
360 struct sta_info *sta;
361 int ret = -ENOENT;
362
363 rcu_read_lock();
364
365 sta = sta_info_get_by_idx(local, idx, dev);
366 if (sta) {
367 ret = 0;
368 memcpy(mac, sta->sta.addr, ETH_ALEN);
369 sta_set_sinfo(sta, sinfo);
370 }
371
372 rcu_read_unlock();
373
374 return ret;
375 }
376
ieee80211_get_station(struct wiphy * wiphy,struct net_device * dev,u8 * mac,struct station_info * sinfo)377 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
378 u8 *mac, struct station_info *sinfo)
379 {
380 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
381 struct sta_info *sta;
382 int ret = -ENOENT;
383
384 rcu_read_lock();
385
386 /* XXX: verify sta->dev == dev */
387
388 sta = sta_info_get(local, mac);
389 if (sta) {
390 ret = 0;
391 sta_set_sinfo(sta, sinfo);
392 }
393
394 rcu_read_unlock();
395
396 return ret;
397 }
398
399 /*
400 * This handles both adding a beacon and setting new beacon info
401 */
ieee80211_config_beacon(struct ieee80211_sub_if_data * sdata,struct beacon_parameters * params)402 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
403 struct beacon_parameters *params)
404 {
405 struct beacon_data *new, *old;
406 int new_head_len, new_tail_len;
407 int size;
408 int err = -EINVAL;
409
410 old = sdata->u.ap.beacon;
411
412 /* head must not be zero-length */
413 if (params->head && !params->head_len)
414 return -EINVAL;
415
416 /*
417 * This is a kludge. beacon interval should really be part
418 * of the beacon information.
419 */
420 if (params->interval) {
421 sdata->local->hw.conf.beacon_int = params->interval;
422 err = ieee80211_hw_config(sdata->local,
423 IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
424 if (err < 0)
425 return err;
426 /*
427 * We updated some parameter so if below bails out
428 * it's not an error.
429 */
430 err = 0;
431 }
432
433 /* Need to have a beacon head if we don't have one yet */
434 if (!params->head && !old)
435 return err;
436
437 /* sorry, no way to start beaconing without dtim period */
438 if (!params->dtim_period && !old)
439 return err;
440
441 /* new or old head? */
442 if (params->head)
443 new_head_len = params->head_len;
444 else
445 new_head_len = old->head_len;
446
447 /* new or old tail? */
448 if (params->tail || !old)
449 /* params->tail_len will be zero for !params->tail */
450 new_tail_len = params->tail_len;
451 else
452 new_tail_len = old->tail_len;
453
454 size = sizeof(*new) + new_head_len + new_tail_len;
455
456 new = kzalloc(size, GFP_KERNEL);
457 if (!new)
458 return -ENOMEM;
459
460 /* start filling the new info now */
461
462 /* new or old dtim period? */
463 if (params->dtim_period)
464 new->dtim_period = params->dtim_period;
465 else
466 new->dtim_period = old->dtim_period;
467
468 /*
469 * pointers go into the block we allocated,
470 * memory is | beacon_data | head | tail |
471 */
472 new->head = ((u8 *) new) + sizeof(*new);
473 new->tail = new->head + new_head_len;
474 new->head_len = new_head_len;
475 new->tail_len = new_tail_len;
476
477 /* copy in head */
478 if (params->head)
479 memcpy(new->head, params->head, new_head_len);
480 else
481 memcpy(new->head, old->head, new_head_len);
482
483 /* copy in optional tail */
484 if (params->tail)
485 memcpy(new->tail, params->tail, new_tail_len);
486 else
487 if (old)
488 memcpy(new->tail, old->tail, new_tail_len);
489
490 rcu_assign_pointer(sdata->u.ap.beacon, new);
491
492 synchronize_rcu();
493
494 kfree(old);
495
496 return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
497 }
498
ieee80211_add_beacon(struct wiphy * wiphy,struct net_device * dev,struct beacon_parameters * params)499 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
500 struct beacon_parameters *params)
501 {
502 struct ieee80211_sub_if_data *sdata;
503 struct beacon_data *old;
504
505 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
506
507 if (sdata->vif.type != NL80211_IFTYPE_AP)
508 return -EINVAL;
509
510 old = sdata->u.ap.beacon;
511
512 if (old)
513 return -EALREADY;
514
515 return ieee80211_config_beacon(sdata, params);
516 }
517
ieee80211_set_beacon(struct wiphy * wiphy,struct net_device * dev,struct beacon_parameters * params)518 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
519 struct beacon_parameters *params)
520 {
521 struct ieee80211_sub_if_data *sdata;
522 struct beacon_data *old;
523
524 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
525
526 if (sdata->vif.type != NL80211_IFTYPE_AP)
527 return -EINVAL;
528
529 old = sdata->u.ap.beacon;
530
531 if (!old)
532 return -ENOENT;
533
534 return ieee80211_config_beacon(sdata, params);
535 }
536
ieee80211_del_beacon(struct wiphy * wiphy,struct net_device * dev)537 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
538 {
539 struct ieee80211_sub_if_data *sdata;
540 struct beacon_data *old;
541
542 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
543
544 if (sdata->vif.type != NL80211_IFTYPE_AP)
545 return -EINVAL;
546
547 old = sdata->u.ap.beacon;
548
549 if (!old)
550 return -ENOENT;
551
552 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
553 synchronize_rcu();
554 kfree(old);
555
556 return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
557 }
558
559 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
560 struct iapp_layer2_update {
561 u8 da[ETH_ALEN]; /* broadcast */
562 u8 sa[ETH_ALEN]; /* STA addr */
563 __be16 len; /* 6 */
564 u8 dsap; /* 0 */
565 u8 ssap; /* 0 */
566 u8 control;
567 u8 xid_info[3];
568 } __attribute__ ((packed));
569
ieee80211_send_layer2_update(struct sta_info * sta)570 static void ieee80211_send_layer2_update(struct sta_info *sta)
571 {
572 struct iapp_layer2_update *msg;
573 struct sk_buff *skb;
574
575 /* Send Level 2 Update Frame to update forwarding tables in layer 2
576 * bridge devices */
577
578 skb = dev_alloc_skb(sizeof(*msg));
579 if (!skb)
580 return;
581 msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
582
583 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
584 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
585
586 memset(msg->da, 0xff, ETH_ALEN);
587 memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
588 msg->len = htons(6);
589 msg->dsap = 0;
590 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
591 msg->control = 0xaf; /* XID response lsb.1111F101.
592 * F=0 (no poll command; unsolicited frame) */
593 msg->xid_info[0] = 0x81; /* XID format identifier */
594 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
595 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
596
597 skb->dev = sta->sdata->dev;
598 skb->protocol = eth_type_trans(skb, sta->sdata->dev);
599 memset(skb->cb, 0, sizeof(skb->cb));
600 netif_rx(skb);
601 }
602
sta_apply_parameters(struct ieee80211_local * local,struct sta_info * sta,struct station_parameters * params)603 static void sta_apply_parameters(struct ieee80211_local *local,
604 struct sta_info *sta,
605 struct station_parameters *params)
606 {
607 u32 rates;
608 int i, j;
609 struct ieee80211_supported_band *sband;
610 struct ieee80211_sub_if_data *sdata = sta->sdata;
611
612 sband = local->hw.wiphy->bands[local->oper_channel->band];
613
614 /*
615 * FIXME: updating the flags is racy when this function is
616 * called from ieee80211_change_station(), this will
617 * be resolved in a future patch.
618 */
619
620 if (params->station_flags & STATION_FLAG_CHANGED) {
621 spin_lock_bh(&sta->lock);
622 sta->flags &= ~WLAN_STA_AUTHORIZED;
623 if (params->station_flags & STATION_FLAG_AUTHORIZED)
624 sta->flags |= WLAN_STA_AUTHORIZED;
625
626 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
627 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
628 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
629
630 sta->flags &= ~WLAN_STA_WME;
631 if (params->station_flags & STATION_FLAG_WME)
632 sta->flags |= WLAN_STA_WME;
633 spin_unlock_bh(&sta->lock);
634 }
635
636 /*
637 * FIXME: updating the following information is racy when this
638 * function is called from ieee80211_change_station().
639 * However, all this information should be static so
640 * maybe we should just reject attemps to change it.
641 */
642
643 if (params->aid) {
644 sta->sta.aid = params->aid;
645 if (sta->sta.aid > IEEE80211_MAX_AID)
646 sta->sta.aid = 0; /* XXX: should this be an error? */
647 }
648
649 if (params->listen_interval >= 0)
650 sta->listen_interval = params->listen_interval;
651
652 if (params->supported_rates) {
653 rates = 0;
654
655 for (i = 0; i < params->supported_rates_len; i++) {
656 int rate = (params->supported_rates[i] & 0x7f) * 5;
657 for (j = 0; j < sband->n_bitrates; j++) {
658 if (sband->bitrates[j].bitrate == rate)
659 rates |= BIT(j);
660 }
661 }
662 sta->sta.supp_rates[local->oper_channel->band] = rates;
663 }
664
665 if (params->ht_capa)
666 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
667 params->ht_capa,
668 &sta->sta.ht_cap);
669
670 if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
671 switch (params->plink_action) {
672 case PLINK_ACTION_OPEN:
673 mesh_plink_open(sta);
674 break;
675 case PLINK_ACTION_BLOCK:
676 mesh_plink_block(sta);
677 break;
678 }
679 }
680 }
681
ieee80211_add_station(struct wiphy * wiphy,struct net_device * dev,u8 * mac,struct station_parameters * params)682 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
683 u8 *mac, struct station_parameters *params)
684 {
685 struct ieee80211_local *local = wiphy_priv(wiphy);
686 struct sta_info *sta;
687 struct ieee80211_sub_if_data *sdata;
688 int err;
689 int layer2_update;
690
691 /* Prevent a race with changing the rate control algorithm */
692 if (!netif_running(dev))
693 return -ENETDOWN;
694
695 if (params->vlan) {
696 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
697
698 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
699 sdata->vif.type != NL80211_IFTYPE_AP)
700 return -EINVAL;
701 } else
702 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
703
704 if (compare_ether_addr(mac, dev->dev_addr) == 0)
705 return -EINVAL;
706
707 if (is_multicast_ether_addr(mac))
708 return -EINVAL;
709
710 sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
711 if (!sta)
712 return -ENOMEM;
713
714 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
715
716 sta_apply_parameters(local, sta, params);
717
718 rate_control_rate_init(sta);
719
720 layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
721 sdata->vif.type == NL80211_IFTYPE_AP;
722
723 rcu_read_lock();
724
725 err = sta_info_insert(sta);
726 if (err) {
727 /* STA has been freed */
728 if (err == -EEXIST && layer2_update) {
729 /* Need to update layer 2 devices on reassociation */
730 sta = sta_info_get(local, mac);
731 if (sta)
732 ieee80211_send_layer2_update(sta);
733 }
734 rcu_read_unlock();
735 return err;
736 }
737
738 if (layer2_update)
739 ieee80211_send_layer2_update(sta);
740
741 rcu_read_unlock();
742
743 return 0;
744 }
745
ieee80211_del_station(struct wiphy * wiphy,struct net_device * dev,u8 * mac)746 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
747 u8 *mac)
748 {
749 struct ieee80211_local *local = wiphy_priv(wiphy);
750 struct ieee80211_sub_if_data *sdata;
751 struct sta_info *sta;
752
753 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
754
755 if (mac) {
756 rcu_read_lock();
757
758 /* XXX: get sta belonging to dev */
759 sta = sta_info_get(local, mac);
760 if (!sta) {
761 rcu_read_unlock();
762 return -ENOENT;
763 }
764
765 sta_info_unlink(&sta);
766 rcu_read_unlock();
767
768 sta_info_destroy(sta);
769 } else
770 sta_info_flush(local, sdata);
771
772 return 0;
773 }
774
ieee80211_change_station(struct wiphy * wiphy,struct net_device * dev,u8 * mac,struct station_parameters * params)775 static int ieee80211_change_station(struct wiphy *wiphy,
776 struct net_device *dev,
777 u8 *mac,
778 struct station_parameters *params)
779 {
780 struct ieee80211_local *local = wiphy_priv(wiphy);
781 struct sta_info *sta;
782 struct ieee80211_sub_if_data *vlansdata;
783
784 rcu_read_lock();
785
786 /* XXX: get sta belonging to dev */
787 sta = sta_info_get(local, mac);
788 if (!sta) {
789 rcu_read_unlock();
790 return -ENOENT;
791 }
792
793 if (params->vlan && params->vlan != sta->sdata->dev) {
794 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
795
796 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
797 vlansdata->vif.type != NL80211_IFTYPE_AP) {
798 rcu_read_unlock();
799 return -EINVAL;
800 }
801
802 sta->sdata = vlansdata;
803 ieee80211_send_layer2_update(sta);
804 }
805
806 sta_apply_parameters(local, sta, params);
807
808 rcu_read_unlock();
809
810 return 0;
811 }
812
813 #ifdef CONFIG_MAC80211_MESH
ieee80211_add_mpath(struct wiphy * wiphy,struct net_device * dev,u8 * dst,u8 * next_hop)814 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
815 u8 *dst, u8 *next_hop)
816 {
817 struct ieee80211_local *local = wiphy_priv(wiphy);
818 struct ieee80211_sub_if_data *sdata;
819 struct mesh_path *mpath;
820 struct sta_info *sta;
821 int err;
822
823 if (!netif_running(dev))
824 return -ENETDOWN;
825
826 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
827
828 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
829 return -ENOTSUPP;
830
831 rcu_read_lock();
832 sta = sta_info_get(local, next_hop);
833 if (!sta) {
834 rcu_read_unlock();
835 return -ENOENT;
836 }
837
838 err = mesh_path_add(dst, sdata);
839 if (err) {
840 rcu_read_unlock();
841 return err;
842 }
843
844 mpath = mesh_path_lookup(dst, sdata);
845 if (!mpath) {
846 rcu_read_unlock();
847 return -ENXIO;
848 }
849 mesh_path_fix_nexthop(mpath, sta);
850
851 rcu_read_unlock();
852 return 0;
853 }
854
ieee80211_del_mpath(struct wiphy * wiphy,struct net_device * dev,u8 * dst)855 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
856 u8 *dst)
857 {
858 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
859
860 if (dst)
861 return mesh_path_del(dst, sdata);
862
863 mesh_path_flush(sdata);
864 return 0;
865 }
866
ieee80211_change_mpath(struct wiphy * wiphy,struct net_device * dev,u8 * dst,u8 * next_hop)867 static int ieee80211_change_mpath(struct wiphy *wiphy,
868 struct net_device *dev,
869 u8 *dst, u8 *next_hop)
870 {
871 struct ieee80211_local *local = wiphy_priv(wiphy);
872 struct ieee80211_sub_if_data *sdata;
873 struct mesh_path *mpath;
874 struct sta_info *sta;
875
876 if (!netif_running(dev))
877 return -ENETDOWN;
878
879 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
880
881 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
882 return -ENOTSUPP;
883
884 rcu_read_lock();
885
886 sta = sta_info_get(local, next_hop);
887 if (!sta) {
888 rcu_read_unlock();
889 return -ENOENT;
890 }
891
892 mpath = mesh_path_lookup(dst, sdata);
893 if (!mpath) {
894 rcu_read_unlock();
895 return -ENOENT;
896 }
897
898 mesh_path_fix_nexthop(mpath, sta);
899
900 rcu_read_unlock();
901 return 0;
902 }
903
mpath_set_pinfo(struct mesh_path * mpath,u8 * next_hop,struct mpath_info * pinfo)904 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
905 struct mpath_info *pinfo)
906 {
907 if (mpath->next_hop)
908 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
909 else
910 memset(next_hop, 0, ETH_ALEN);
911
912 pinfo->filled = MPATH_INFO_FRAME_QLEN |
913 MPATH_INFO_DSN |
914 MPATH_INFO_METRIC |
915 MPATH_INFO_EXPTIME |
916 MPATH_INFO_DISCOVERY_TIMEOUT |
917 MPATH_INFO_DISCOVERY_RETRIES |
918 MPATH_INFO_FLAGS;
919
920 pinfo->frame_qlen = mpath->frame_queue.qlen;
921 pinfo->dsn = mpath->dsn;
922 pinfo->metric = mpath->metric;
923 if (time_before(jiffies, mpath->exp_time))
924 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
925 pinfo->discovery_timeout =
926 jiffies_to_msecs(mpath->discovery_timeout);
927 pinfo->discovery_retries = mpath->discovery_retries;
928 pinfo->flags = 0;
929 if (mpath->flags & MESH_PATH_ACTIVE)
930 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
931 if (mpath->flags & MESH_PATH_RESOLVING)
932 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
933 if (mpath->flags & MESH_PATH_DSN_VALID)
934 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
935 if (mpath->flags & MESH_PATH_FIXED)
936 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
937 if (mpath->flags & MESH_PATH_RESOLVING)
938 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
939
940 pinfo->flags = mpath->flags;
941 }
942
ieee80211_get_mpath(struct wiphy * wiphy,struct net_device * dev,u8 * dst,u8 * next_hop,struct mpath_info * pinfo)943 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
944 u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
945
946 {
947 struct ieee80211_sub_if_data *sdata;
948 struct mesh_path *mpath;
949
950 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
951
952 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
953 return -ENOTSUPP;
954
955 rcu_read_lock();
956 mpath = mesh_path_lookup(dst, sdata);
957 if (!mpath) {
958 rcu_read_unlock();
959 return -ENOENT;
960 }
961 memcpy(dst, mpath->dst, ETH_ALEN);
962 mpath_set_pinfo(mpath, next_hop, pinfo);
963 rcu_read_unlock();
964 return 0;
965 }
966
ieee80211_dump_mpath(struct wiphy * wiphy,struct net_device * dev,int idx,u8 * dst,u8 * next_hop,struct mpath_info * pinfo)967 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
968 int idx, u8 *dst, u8 *next_hop,
969 struct mpath_info *pinfo)
970 {
971 struct ieee80211_sub_if_data *sdata;
972 struct mesh_path *mpath;
973
974 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
975
976 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
977 return -ENOTSUPP;
978
979 rcu_read_lock();
980 mpath = mesh_path_lookup_by_idx(idx, sdata);
981 if (!mpath) {
982 rcu_read_unlock();
983 return -ENOENT;
984 }
985 memcpy(dst, mpath->dst, ETH_ALEN);
986 mpath_set_pinfo(mpath, next_hop, pinfo);
987 rcu_read_unlock();
988 return 0;
989 }
990
ieee80211_get_mesh_params(struct wiphy * wiphy,struct net_device * dev,struct mesh_config * conf)991 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
992 struct net_device *dev,
993 struct mesh_config *conf)
994 {
995 struct ieee80211_sub_if_data *sdata;
996 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
997
998 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
999 return -ENOTSUPP;
1000 memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1001 return 0;
1002 }
1003
_chg_mesh_attr(enum nl80211_meshconf_params parm,u32 mask)1004 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1005 {
1006 return (mask >> (parm-1)) & 0x1;
1007 }
1008
ieee80211_set_mesh_params(struct wiphy * wiphy,struct net_device * dev,const struct mesh_config * nconf,u32 mask)1009 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
1010 struct net_device *dev,
1011 const struct mesh_config *nconf, u32 mask)
1012 {
1013 struct mesh_config *conf;
1014 struct ieee80211_sub_if_data *sdata;
1015 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1016
1017 if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1018 return -ENOTSUPP;
1019
1020 /* Set the config options which we are interested in setting */
1021 conf = &(sdata->u.mesh.mshcfg);
1022 if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1023 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1024 if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1025 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1026 if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1027 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1028 if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1029 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1030 if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1031 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1032 if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1033 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1034 if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1035 conf->auto_open_plinks = nconf->auto_open_plinks;
1036 if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1037 conf->dot11MeshHWMPmaxPREQretries =
1038 nconf->dot11MeshHWMPmaxPREQretries;
1039 if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1040 conf->path_refresh_time = nconf->path_refresh_time;
1041 if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1042 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1043 if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1044 conf->dot11MeshHWMPactivePathTimeout =
1045 nconf->dot11MeshHWMPactivePathTimeout;
1046 if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1047 conf->dot11MeshHWMPpreqMinInterval =
1048 nconf->dot11MeshHWMPpreqMinInterval;
1049 if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1050 mask))
1051 conf->dot11MeshHWMPnetDiameterTraversalTime =
1052 nconf->dot11MeshHWMPnetDiameterTraversalTime;
1053 return 0;
1054 }
1055
1056 #endif
1057
ieee80211_change_bss(struct wiphy * wiphy,struct net_device * dev,struct bss_parameters * params)1058 static int ieee80211_change_bss(struct wiphy *wiphy,
1059 struct net_device *dev,
1060 struct bss_parameters *params)
1061 {
1062 struct ieee80211_sub_if_data *sdata;
1063 u32 changed = 0;
1064
1065 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1066
1067 if (sdata->vif.type != NL80211_IFTYPE_AP)
1068 return -EINVAL;
1069
1070 if (params->use_cts_prot >= 0) {
1071 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1072 changed |= BSS_CHANGED_ERP_CTS_PROT;
1073 }
1074 if (params->use_short_preamble >= 0) {
1075 sdata->vif.bss_conf.use_short_preamble =
1076 params->use_short_preamble;
1077 changed |= BSS_CHANGED_ERP_PREAMBLE;
1078 }
1079 if (params->use_short_slot_time >= 0) {
1080 sdata->vif.bss_conf.use_short_slot =
1081 params->use_short_slot_time;
1082 changed |= BSS_CHANGED_ERP_SLOT;
1083 }
1084
1085 if (params->basic_rates) {
1086 int i, j;
1087 u32 rates = 0;
1088 struct ieee80211_local *local = wiphy_priv(wiphy);
1089 struct ieee80211_supported_band *sband =
1090 wiphy->bands[local->oper_channel->band];
1091
1092 for (i = 0; i < params->basic_rates_len; i++) {
1093 int rate = (params->basic_rates[i] & 0x7f) * 5;
1094 for (j = 0; j < sband->n_bitrates; j++) {
1095 if (sband->bitrates[j].bitrate == rate)
1096 rates |= BIT(j);
1097 }
1098 }
1099 sdata->vif.bss_conf.basic_rates = rates;
1100 changed |= BSS_CHANGED_BASIC_RATES;
1101 }
1102
1103 ieee80211_bss_info_change_notify(sdata, changed);
1104
1105 return 0;
1106 }
1107
ieee80211_set_txq_params(struct wiphy * wiphy,struct ieee80211_txq_params * params)1108 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1109 struct ieee80211_txq_params *params)
1110 {
1111 struct ieee80211_local *local = wiphy_priv(wiphy);
1112 struct ieee80211_tx_queue_params p;
1113
1114 if (!local->ops->conf_tx)
1115 return -EOPNOTSUPP;
1116
1117 memset(&p, 0, sizeof(p));
1118 p.aifs = params->aifs;
1119 p.cw_max = params->cwmax;
1120 p.cw_min = params->cwmin;
1121 p.txop = params->txop;
1122 if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1123 printk(KERN_DEBUG "%s: failed to set TX queue "
1124 "parameters for queue %d\n", local->mdev->name,
1125 params->queue);
1126 return -EINVAL;
1127 }
1128
1129 return 0;
1130 }
1131
ieee80211_set_channel(struct wiphy * wiphy,struct ieee80211_channel * chan,enum nl80211_channel_type channel_type)1132 static int ieee80211_set_channel(struct wiphy *wiphy,
1133 struct ieee80211_channel *chan,
1134 enum nl80211_channel_type channel_type)
1135 {
1136 struct ieee80211_local *local = wiphy_priv(wiphy);
1137
1138 local->oper_channel = chan;
1139 local->oper_channel_type = channel_type;
1140
1141 return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1142 }
1143
1144 struct cfg80211_ops mac80211_config_ops = {
1145 .add_virtual_intf = ieee80211_add_iface,
1146 .del_virtual_intf = ieee80211_del_iface,
1147 .change_virtual_intf = ieee80211_change_iface,
1148 .add_key = ieee80211_add_key,
1149 .del_key = ieee80211_del_key,
1150 .get_key = ieee80211_get_key,
1151 .set_default_key = ieee80211_config_default_key,
1152 .add_beacon = ieee80211_add_beacon,
1153 .set_beacon = ieee80211_set_beacon,
1154 .del_beacon = ieee80211_del_beacon,
1155 .add_station = ieee80211_add_station,
1156 .del_station = ieee80211_del_station,
1157 .change_station = ieee80211_change_station,
1158 .get_station = ieee80211_get_station,
1159 .dump_station = ieee80211_dump_station,
1160 #ifdef CONFIG_MAC80211_MESH
1161 .add_mpath = ieee80211_add_mpath,
1162 .del_mpath = ieee80211_del_mpath,
1163 .change_mpath = ieee80211_change_mpath,
1164 .get_mpath = ieee80211_get_mpath,
1165 .dump_mpath = ieee80211_dump_mpath,
1166 .set_mesh_params = ieee80211_set_mesh_params,
1167 .get_mesh_params = ieee80211_get_mesh_params,
1168 #endif
1169 .change_bss = ieee80211_change_bss,
1170 .set_txq_params = ieee80211_set_txq_params,
1171 .set_channel = ieee80211_set_channel,
1172 };
1173