nl80211: Add frequency configuration (including HT40)
[linux-2.6.git] / net / mac80211 / cfg.c
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
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
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
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
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
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
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
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(&params, 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, &params);
284         err = 0;
285
286  out:
287         rcu_read_unlock();
288         return err;
289 }
290
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
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
315         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
316         sinfo->rx_bytes = sta->rx_bytes;
317         sinfo->tx_bytes = sta->tx_bytes;
318
319         if (ieee80211_vif_is_mesh(&sdata->vif)) {
320 #ifdef CONFIG_MAC80211_MESH
321                 sinfo->filled |= STATION_INFO_LLID |
322                                  STATION_INFO_PLID |
323                                  STATION_INFO_PLINK_STATE;
324
325                 sinfo->llid = le16_to_cpu(sta->llid);
326                 sinfo->plid = le16_to_cpu(sta->plid);
327                 sinfo->plink_state = sta->plink_state;
328 #endif
329         }
330 }
331
332
333 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
334                                  int idx, u8 *mac, struct station_info *sinfo)
335 {
336         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
337         struct sta_info *sta;
338         int ret = -ENOENT;
339
340         rcu_read_lock();
341
342         sta = sta_info_get_by_idx(local, idx, dev);
343         if (sta) {
344                 ret = 0;
345                 memcpy(mac, sta->sta.addr, ETH_ALEN);
346                 sta_set_sinfo(sta, sinfo);
347         }
348
349         rcu_read_unlock();
350
351         return ret;
352 }
353
354 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
355                                  u8 *mac, struct station_info *sinfo)
356 {
357         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
358         struct sta_info *sta;
359         int ret = -ENOENT;
360
361         rcu_read_lock();
362
363         /* XXX: verify sta->dev == dev */
364
365         sta = sta_info_get(local, mac);
366         if (sta) {
367                 ret = 0;
368                 sta_set_sinfo(sta, sinfo);
369         }
370
371         rcu_read_unlock();
372
373         return ret;
374 }
375
376 /*
377  * This handles both adding a beacon and setting new beacon info
378  */
379 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
380                                    struct beacon_parameters *params)
381 {
382         struct beacon_data *new, *old;
383         int new_head_len, new_tail_len;
384         int size;
385         int err = -EINVAL;
386
387         old = sdata->u.ap.beacon;
388
389         /* head must not be zero-length */
390         if (params->head && !params->head_len)
391                 return -EINVAL;
392
393         /*
394          * This is a kludge. beacon interval should really be part
395          * of the beacon information.
396          */
397         if (params->interval) {
398                 sdata->local->hw.conf.beacon_int = params->interval;
399                 ieee80211_hw_config(sdata->local,
400                                     IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
401                 /*
402                  * We updated some parameter so if below bails out
403                  * it's not an error.
404                  */
405                 err = 0;
406         }
407
408         /* Need to have a beacon head if we don't have one yet */
409         if (!params->head && !old)
410                 return err;
411
412         /* sorry, no way to start beaconing without dtim period */
413         if (!params->dtim_period && !old)
414                 return err;
415
416         /* new or old head? */
417         if (params->head)
418                 new_head_len = params->head_len;
419         else
420                 new_head_len = old->head_len;
421
422         /* new or old tail? */
423         if (params->tail || !old)
424                 /* params->tail_len will be zero for !params->tail */
425                 new_tail_len = params->tail_len;
426         else
427                 new_tail_len = old->tail_len;
428
429         size = sizeof(*new) + new_head_len + new_tail_len;
430
431         new = kzalloc(size, GFP_KERNEL);
432         if (!new)
433                 return -ENOMEM;
434
435         /* start filling the new info now */
436
437         /* new or old dtim period? */
438         if (params->dtim_period)
439                 new->dtim_period = params->dtim_period;
440         else
441                 new->dtim_period = old->dtim_period;
442
443         /*
444          * pointers go into the block we allocated,
445          * memory is | beacon_data | head | tail |
446          */
447         new->head = ((u8 *) new) + sizeof(*new);
448         new->tail = new->head + new_head_len;
449         new->head_len = new_head_len;
450         new->tail_len = new_tail_len;
451
452         /* copy in head */
453         if (params->head)
454                 memcpy(new->head, params->head, new_head_len);
455         else
456                 memcpy(new->head, old->head, new_head_len);
457
458         /* copy in optional tail */
459         if (params->tail)
460                 memcpy(new->tail, params->tail, new_tail_len);
461         else
462                 if (old)
463                         memcpy(new->tail, old->tail, new_tail_len);
464
465         rcu_assign_pointer(sdata->u.ap.beacon, new);
466
467         synchronize_rcu();
468
469         kfree(old);
470
471         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
472 }
473
474 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
475                                 struct beacon_parameters *params)
476 {
477         struct ieee80211_sub_if_data *sdata;
478         struct beacon_data *old;
479
480         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
481
482         if (sdata->vif.type != NL80211_IFTYPE_AP)
483                 return -EINVAL;
484
485         old = sdata->u.ap.beacon;
486
487         if (old)
488                 return -EALREADY;
489
490         return ieee80211_config_beacon(sdata, params);
491 }
492
493 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
494                                 struct beacon_parameters *params)
495 {
496         struct ieee80211_sub_if_data *sdata;
497         struct beacon_data *old;
498
499         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
500
501         if (sdata->vif.type != NL80211_IFTYPE_AP)
502                 return -EINVAL;
503
504         old = sdata->u.ap.beacon;
505
506         if (!old)
507                 return -ENOENT;
508
509         return ieee80211_config_beacon(sdata, params);
510 }
511
512 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
513 {
514         struct ieee80211_sub_if_data *sdata;
515         struct beacon_data *old;
516
517         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
518
519         if (sdata->vif.type != NL80211_IFTYPE_AP)
520                 return -EINVAL;
521
522         old = sdata->u.ap.beacon;
523
524         if (!old)
525                 return -ENOENT;
526
527         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
528         synchronize_rcu();
529         kfree(old);
530
531         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
532 }
533
534 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
535 struct iapp_layer2_update {
536         u8 da[ETH_ALEN];        /* broadcast */
537         u8 sa[ETH_ALEN];        /* STA addr */
538         __be16 len;             /* 6 */
539         u8 dsap;                /* 0 */
540         u8 ssap;                /* 0 */
541         u8 control;
542         u8 xid_info[3];
543 } __attribute__ ((packed));
544
545 static void ieee80211_send_layer2_update(struct sta_info *sta)
546 {
547         struct iapp_layer2_update *msg;
548         struct sk_buff *skb;
549
550         /* Send Level 2 Update Frame to update forwarding tables in layer 2
551          * bridge devices */
552
553         skb = dev_alloc_skb(sizeof(*msg));
554         if (!skb)
555                 return;
556         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
557
558         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
559          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
560
561         memset(msg->da, 0xff, ETH_ALEN);
562         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
563         msg->len = htons(6);
564         msg->dsap = 0;
565         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
566         msg->control = 0xaf;    /* XID response lsb.1111F101.
567                                  * F=0 (no poll command; unsolicited frame) */
568         msg->xid_info[0] = 0x81;        /* XID format identifier */
569         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
570         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
571
572         skb->dev = sta->sdata->dev;
573         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
574         memset(skb->cb, 0, sizeof(skb->cb));
575         netif_rx(skb);
576 }
577
578 static void sta_apply_parameters(struct ieee80211_local *local,
579                                  struct sta_info *sta,
580                                  struct station_parameters *params)
581 {
582         u32 rates;
583         int i, j;
584         struct ieee80211_supported_band *sband;
585         struct ieee80211_sub_if_data *sdata = sta->sdata;
586
587         sband = local->hw.wiphy->bands[local->oper_channel->band];
588
589         /*
590          * FIXME: updating the flags is racy when this function is
591          *        called from ieee80211_change_station(), this will
592          *        be resolved in a future patch.
593          */
594
595         if (params->station_flags & STATION_FLAG_CHANGED) {
596                 spin_lock_bh(&sta->lock);
597                 sta->flags &= ~WLAN_STA_AUTHORIZED;
598                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
599                         sta->flags |= WLAN_STA_AUTHORIZED;
600
601                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
602                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
603                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
604
605                 sta->flags &= ~WLAN_STA_WME;
606                 if (params->station_flags & STATION_FLAG_WME)
607                         sta->flags |= WLAN_STA_WME;
608                 spin_unlock_bh(&sta->lock);
609         }
610
611         /*
612          * FIXME: updating the following information is racy when this
613          *        function is called from ieee80211_change_station().
614          *        However, all this information should be static so
615          *        maybe we should just reject attemps to change it.
616          */
617
618         if (params->aid) {
619                 sta->sta.aid = params->aid;
620                 if (sta->sta.aid > IEEE80211_MAX_AID)
621                         sta->sta.aid = 0; /* XXX: should this be an error? */
622         }
623
624         if (params->listen_interval >= 0)
625                 sta->listen_interval = params->listen_interval;
626
627         if (params->supported_rates) {
628                 rates = 0;
629
630                 for (i = 0; i < params->supported_rates_len; i++) {
631                         int rate = (params->supported_rates[i] & 0x7f) * 5;
632                         for (j = 0; j < sband->n_bitrates; j++) {
633                                 if (sband->bitrates[j].bitrate == rate)
634                                         rates |= BIT(j);
635                         }
636                 }
637                 sta->sta.supp_rates[local->oper_channel->band] = rates;
638         }
639
640         if (params->ht_capa)
641                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
642                                                   params->ht_capa,
643                                                   &sta->sta.ht_cap);
644
645         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
646                 switch (params->plink_action) {
647                 case PLINK_ACTION_OPEN:
648                         mesh_plink_open(sta);
649                         break;
650                 case PLINK_ACTION_BLOCK:
651                         mesh_plink_block(sta);
652                         break;
653                 }
654         }
655 }
656
657 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
658                                  u8 *mac, struct station_parameters *params)
659 {
660         struct ieee80211_local *local = wiphy_priv(wiphy);
661         struct sta_info *sta;
662         struct ieee80211_sub_if_data *sdata;
663         int err;
664
665         /* Prevent a race with changing the rate control algorithm */
666         if (!netif_running(dev))
667                 return -ENETDOWN;
668
669         if (params->vlan) {
670                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
671
672                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
673                     sdata->vif.type != NL80211_IFTYPE_AP)
674                         return -EINVAL;
675         } else
676                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
677
678         if (compare_ether_addr(mac, dev->dev_addr) == 0)
679                 return -EINVAL;
680
681         if (is_multicast_ether_addr(mac))
682                 return -EINVAL;
683
684         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
685         if (!sta)
686                 return -ENOMEM;
687
688         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
689
690         sta_apply_parameters(local, sta, params);
691
692         rate_control_rate_init(sta);
693
694         rcu_read_lock();
695
696         err = sta_info_insert(sta);
697         if (err) {
698                 /* STA has been freed */
699                 rcu_read_unlock();
700                 return err;
701         }
702
703         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
704             sdata->vif.type == NL80211_IFTYPE_AP)
705                 ieee80211_send_layer2_update(sta);
706
707         rcu_read_unlock();
708
709         return 0;
710 }
711
712 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
713                                  u8 *mac)
714 {
715         struct ieee80211_local *local = wiphy_priv(wiphy);
716         struct ieee80211_sub_if_data *sdata;
717         struct sta_info *sta;
718
719         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
720
721         if (mac) {
722                 rcu_read_lock();
723
724                 /* XXX: get sta belonging to dev */
725                 sta = sta_info_get(local, mac);
726                 if (!sta) {
727                         rcu_read_unlock();
728                         return -ENOENT;
729                 }
730
731                 sta_info_unlink(&sta);
732                 rcu_read_unlock();
733
734                 sta_info_destroy(sta);
735         } else
736                 sta_info_flush(local, sdata);
737
738         return 0;
739 }
740
741 static int ieee80211_change_station(struct wiphy *wiphy,
742                                     struct net_device *dev,
743                                     u8 *mac,
744                                     struct station_parameters *params)
745 {
746         struct ieee80211_local *local = wiphy_priv(wiphy);
747         struct sta_info *sta;
748         struct ieee80211_sub_if_data *vlansdata;
749
750         rcu_read_lock();
751
752         /* XXX: get sta belonging to dev */
753         sta = sta_info_get(local, mac);
754         if (!sta) {
755                 rcu_read_unlock();
756                 return -ENOENT;
757         }
758
759         if (params->vlan && params->vlan != sta->sdata->dev) {
760                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
761
762                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
763                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
764                         rcu_read_unlock();
765                         return -EINVAL;
766                 }
767
768                 sta->sdata = vlansdata;
769                 ieee80211_send_layer2_update(sta);
770         }
771
772         sta_apply_parameters(local, sta, params);
773
774         rcu_read_unlock();
775
776         return 0;
777 }
778
779 #ifdef CONFIG_MAC80211_MESH
780 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
781                                  u8 *dst, u8 *next_hop)
782 {
783         struct ieee80211_local *local = wiphy_priv(wiphy);
784         struct ieee80211_sub_if_data *sdata;
785         struct mesh_path *mpath;
786         struct sta_info *sta;
787         int err;
788
789         if (!netif_running(dev))
790                 return -ENETDOWN;
791
792         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
793
794         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
795                 return -ENOTSUPP;
796
797         rcu_read_lock();
798         sta = sta_info_get(local, next_hop);
799         if (!sta) {
800                 rcu_read_unlock();
801                 return -ENOENT;
802         }
803
804         err = mesh_path_add(dst, sdata);
805         if (err) {
806                 rcu_read_unlock();
807                 return err;
808         }
809
810         mpath = mesh_path_lookup(dst, sdata);
811         if (!mpath) {
812                 rcu_read_unlock();
813                 return -ENXIO;
814         }
815         mesh_path_fix_nexthop(mpath, sta);
816
817         rcu_read_unlock();
818         return 0;
819 }
820
821 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
822                                  u8 *dst)
823 {
824         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
825
826         if (dst)
827                 return mesh_path_del(dst, sdata);
828
829         mesh_path_flush(sdata);
830         return 0;
831 }
832
833 static int ieee80211_change_mpath(struct wiphy *wiphy,
834                                     struct net_device *dev,
835                                     u8 *dst, u8 *next_hop)
836 {
837         struct ieee80211_local *local = wiphy_priv(wiphy);
838         struct ieee80211_sub_if_data *sdata;
839         struct mesh_path *mpath;
840         struct sta_info *sta;
841
842         if (!netif_running(dev))
843                 return -ENETDOWN;
844
845         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
846
847         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
848                 return -ENOTSUPP;
849
850         rcu_read_lock();
851
852         sta = sta_info_get(local, next_hop);
853         if (!sta) {
854                 rcu_read_unlock();
855                 return -ENOENT;
856         }
857
858         mpath = mesh_path_lookup(dst, sdata);
859         if (!mpath) {
860                 rcu_read_unlock();
861                 return -ENOENT;
862         }
863
864         mesh_path_fix_nexthop(mpath, sta);
865
866         rcu_read_unlock();
867         return 0;
868 }
869
870 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
871                             struct mpath_info *pinfo)
872 {
873         if (mpath->next_hop)
874                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
875         else
876                 memset(next_hop, 0, ETH_ALEN);
877
878         pinfo->filled = MPATH_INFO_FRAME_QLEN |
879                         MPATH_INFO_DSN |
880                         MPATH_INFO_METRIC |
881                         MPATH_INFO_EXPTIME |
882                         MPATH_INFO_DISCOVERY_TIMEOUT |
883                         MPATH_INFO_DISCOVERY_RETRIES |
884                         MPATH_INFO_FLAGS;
885
886         pinfo->frame_qlen = mpath->frame_queue.qlen;
887         pinfo->dsn = mpath->dsn;
888         pinfo->metric = mpath->metric;
889         if (time_before(jiffies, mpath->exp_time))
890                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
891         pinfo->discovery_timeout =
892                         jiffies_to_msecs(mpath->discovery_timeout);
893         pinfo->discovery_retries = mpath->discovery_retries;
894         pinfo->flags = 0;
895         if (mpath->flags & MESH_PATH_ACTIVE)
896                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
897         if (mpath->flags & MESH_PATH_RESOLVING)
898                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
899         if (mpath->flags & MESH_PATH_DSN_VALID)
900                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
901         if (mpath->flags & MESH_PATH_FIXED)
902                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
903         if (mpath->flags & MESH_PATH_RESOLVING)
904                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
905
906         pinfo->flags = mpath->flags;
907 }
908
909 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
910                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
911
912 {
913         struct ieee80211_sub_if_data *sdata;
914         struct mesh_path *mpath;
915
916         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
917
918         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
919                 return -ENOTSUPP;
920
921         rcu_read_lock();
922         mpath = mesh_path_lookup(dst, sdata);
923         if (!mpath) {
924                 rcu_read_unlock();
925                 return -ENOENT;
926         }
927         memcpy(dst, mpath->dst, ETH_ALEN);
928         mpath_set_pinfo(mpath, next_hop, pinfo);
929         rcu_read_unlock();
930         return 0;
931 }
932
933 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
934                                  int idx, u8 *dst, u8 *next_hop,
935                                  struct mpath_info *pinfo)
936 {
937         struct ieee80211_sub_if_data *sdata;
938         struct mesh_path *mpath;
939
940         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
941
942         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
943                 return -ENOTSUPP;
944
945         rcu_read_lock();
946         mpath = mesh_path_lookup_by_idx(idx, sdata);
947         if (!mpath) {
948                 rcu_read_unlock();
949                 return -ENOENT;
950         }
951         memcpy(dst, mpath->dst, ETH_ALEN);
952         mpath_set_pinfo(mpath, next_hop, pinfo);
953         rcu_read_unlock();
954         return 0;
955 }
956
957 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
958                                 struct net_device *dev,
959                                 struct mesh_config *conf)
960 {
961         struct ieee80211_sub_if_data *sdata;
962         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
963
964         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
965                 return -ENOTSUPP;
966         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
967         return 0;
968 }
969
970 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
971 {
972         return (mask >> (parm-1)) & 0x1;
973 }
974
975 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
976                                 struct net_device *dev,
977                                 const struct mesh_config *nconf, u32 mask)
978 {
979         struct mesh_config *conf;
980         struct ieee80211_sub_if_data *sdata;
981         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
982
983         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
984                 return -ENOTSUPP;
985
986         /* Set the config options which we are interested in setting */
987         conf = &(sdata->u.mesh.mshcfg);
988         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
989                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
990         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
991                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
992         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
993                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
994         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
995                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
996         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
997                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
998         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
999                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1000         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1001                 conf->auto_open_plinks = nconf->auto_open_plinks;
1002         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1003                 conf->dot11MeshHWMPmaxPREQretries =
1004                         nconf->dot11MeshHWMPmaxPREQretries;
1005         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1006                 conf->path_refresh_time = nconf->path_refresh_time;
1007         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1008                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1009         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1010                 conf->dot11MeshHWMPactivePathTimeout =
1011                         nconf->dot11MeshHWMPactivePathTimeout;
1012         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1013                 conf->dot11MeshHWMPpreqMinInterval =
1014                         nconf->dot11MeshHWMPpreqMinInterval;
1015         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1016                            mask))
1017                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1018                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1019         return 0;
1020 }
1021
1022 #endif
1023
1024 static int ieee80211_change_bss(struct wiphy *wiphy,
1025                                 struct net_device *dev,
1026                                 struct bss_parameters *params)
1027 {
1028         struct ieee80211_sub_if_data *sdata;
1029         u32 changed = 0;
1030
1031         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032
1033         if (sdata->vif.type != NL80211_IFTYPE_AP)
1034                 return -EINVAL;
1035
1036         if (params->use_cts_prot >= 0) {
1037                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1038                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1039         }
1040         if (params->use_short_preamble >= 0) {
1041                 sdata->vif.bss_conf.use_short_preamble =
1042                         params->use_short_preamble;
1043                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1044         }
1045         if (params->use_short_slot_time >= 0) {
1046                 sdata->vif.bss_conf.use_short_slot =
1047                         params->use_short_slot_time;
1048                 changed |= BSS_CHANGED_ERP_SLOT;
1049         }
1050
1051         if (params->basic_rates) {
1052                 int i, j;
1053                 u32 rates = 0;
1054                 struct ieee80211_local *local = wiphy_priv(wiphy);
1055                 struct ieee80211_supported_band *sband =
1056                         wiphy->bands[local->oper_channel->band];
1057
1058                 for (i = 0; i < params->basic_rates_len; i++) {
1059                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1060                         for (j = 0; j < sband->n_bitrates; j++) {
1061                                 if (sband->bitrates[j].bitrate == rate)
1062                                         rates |= BIT(j);
1063                         }
1064                 }
1065                 sdata->vif.bss_conf.basic_rates = rates;
1066                 changed |= BSS_CHANGED_BASIC_RATES;
1067         }
1068
1069         ieee80211_bss_info_change_notify(sdata, changed);
1070
1071         return 0;
1072 }
1073
1074 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1075                                     struct ieee80211_txq_params *params)
1076 {
1077         struct ieee80211_local *local = wiphy_priv(wiphy);
1078         struct ieee80211_tx_queue_params p;
1079
1080         if (!local->ops->conf_tx)
1081                 return -EOPNOTSUPP;
1082
1083         memset(&p, 0, sizeof(p));
1084         p.aifs = params->aifs;
1085         p.cw_max = params->cwmax;
1086         p.cw_min = params->cwmin;
1087         p.txop = params->txop;
1088         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1089                 printk(KERN_DEBUG "%s: failed to set TX queue "
1090                        "parameters for queue %d\n", local->mdev->name,
1091                        params->queue);
1092                 return -EINVAL;
1093         }
1094
1095         return 0;
1096 }
1097
1098 static int ieee80211_set_channel(struct wiphy *wiphy,
1099                                  struct ieee80211_channel *chan,
1100                                  enum nl80211_sec_chan_offset sec_chan_offset)
1101 {
1102         struct ieee80211_local *local = wiphy_priv(wiphy);
1103
1104         local->oper_channel = chan;
1105         local->oper_sec_chan_offset = sec_chan_offset;
1106
1107         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1108 }
1109
1110 struct cfg80211_ops mac80211_config_ops = {
1111         .add_virtual_intf = ieee80211_add_iface,
1112         .del_virtual_intf = ieee80211_del_iface,
1113         .change_virtual_intf = ieee80211_change_iface,
1114         .add_key = ieee80211_add_key,
1115         .del_key = ieee80211_del_key,
1116         .get_key = ieee80211_get_key,
1117         .set_default_key = ieee80211_config_default_key,
1118         .add_beacon = ieee80211_add_beacon,
1119         .set_beacon = ieee80211_set_beacon,
1120         .del_beacon = ieee80211_del_beacon,
1121         .add_station = ieee80211_add_station,
1122         .del_station = ieee80211_del_station,
1123         .change_station = ieee80211_change_station,
1124         .get_station = ieee80211_get_station,
1125         .dump_station = ieee80211_dump_station,
1126 #ifdef CONFIG_MAC80211_MESH
1127         .add_mpath = ieee80211_add_mpath,
1128         .del_mpath = ieee80211_del_mpath,
1129         .change_mpath = ieee80211_change_mpath,
1130         .get_mpath = ieee80211_get_mpath,
1131         .dump_mpath = ieee80211_dump_mpath,
1132         .set_mesh_params = ieee80211_set_mesh_params,
1133         .get_mesh_params = ieee80211_get_mesh_params,
1134 #endif
1135         .change_bss = ieee80211_change_bss,
1136         .set_txq_params = ieee80211_set_txq_params,
1137         .set_channel = ieee80211_set_channel,
1138 };