mac80211: 802.11w - STA flag for MFP
[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                         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
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
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  */
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
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
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
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
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
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
634                 sta->flags &= ~WLAN_STA_MFP;
635                 if (params->station_flags & STATION_FLAG_MFP)
636                         sta->flags |= WLAN_STA_MFP;
637                 spin_unlock_bh(&sta->lock);
638         }
639
640         /*
641          * FIXME: updating the following information is racy when this
642          *        function is called from ieee80211_change_station().
643          *        However, all this information should be static so
644          *        maybe we should just reject attemps to change it.
645          */
646
647         if (params->aid) {
648                 sta->sta.aid = params->aid;
649                 if (sta->sta.aid > IEEE80211_MAX_AID)
650                         sta->sta.aid = 0; /* XXX: should this be an error? */
651         }
652
653         if (params->listen_interval >= 0)
654                 sta->listen_interval = params->listen_interval;
655
656         if (params->supported_rates) {
657                 rates = 0;
658
659                 for (i = 0; i < params->supported_rates_len; i++) {
660                         int rate = (params->supported_rates[i] & 0x7f) * 5;
661                         for (j = 0; j < sband->n_bitrates; j++) {
662                                 if (sband->bitrates[j].bitrate == rate)
663                                         rates |= BIT(j);
664                         }
665                 }
666                 sta->sta.supp_rates[local->oper_channel->band] = rates;
667         }
668
669         if (params->ht_capa)
670                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
671                                                   params->ht_capa,
672                                                   &sta->sta.ht_cap);
673
674         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
675                 switch (params->plink_action) {
676                 case PLINK_ACTION_OPEN:
677                         mesh_plink_open(sta);
678                         break;
679                 case PLINK_ACTION_BLOCK:
680                         mesh_plink_block(sta);
681                         break;
682                 }
683         }
684 }
685
686 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
687                                  u8 *mac, struct station_parameters *params)
688 {
689         struct ieee80211_local *local = wiphy_priv(wiphy);
690         struct sta_info *sta;
691         struct ieee80211_sub_if_data *sdata;
692         int err;
693         int layer2_update;
694
695         /* Prevent a race with changing the rate control algorithm */
696         if (!netif_running(dev))
697                 return -ENETDOWN;
698
699         if (params->vlan) {
700                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
701
702                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
703                     sdata->vif.type != NL80211_IFTYPE_AP)
704                         return -EINVAL;
705         } else
706                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
707
708         if (compare_ether_addr(mac, dev->dev_addr) == 0)
709                 return -EINVAL;
710
711         if (is_multicast_ether_addr(mac))
712                 return -EINVAL;
713
714         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
715         if (!sta)
716                 return -ENOMEM;
717
718         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
719
720         sta_apply_parameters(local, sta, params);
721
722         rate_control_rate_init(sta);
723
724         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
725                 sdata->vif.type == NL80211_IFTYPE_AP;
726
727         rcu_read_lock();
728
729         err = sta_info_insert(sta);
730         if (err) {
731                 /* STA has been freed */
732                 if (err == -EEXIST && layer2_update) {
733                         /* Need to update layer 2 devices on reassociation */
734                         sta = sta_info_get(local, mac);
735                         if (sta)
736                                 ieee80211_send_layer2_update(sta);
737                 }
738                 rcu_read_unlock();
739                 return err;
740         }
741
742         if (layer2_update)
743                 ieee80211_send_layer2_update(sta);
744
745         rcu_read_unlock();
746
747         return 0;
748 }
749
750 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
751                                  u8 *mac)
752 {
753         struct ieee80211_local *local = wiphy_priv(wiphy);
754         struct ieee80211_sub_if_data *sdata;
755         struct sta_info *sta;
756
757         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
758
759         if (mac) {
760                 rcu_read_lock();
761
762                 /* XXX: get sta belonging to dev */
763                 sta = sta_info_get(local, mac);
764                 if (!sta) {
765                         rcu_read_unlock();
766                         return -ENOENT;
767                 }
768
769                 sta_info_unlink(&sta);
770                 rcu_read_unlock();
771
772                 sta_info_destroy(sta);
773         } else
774                 sta_info_flush(local, sdata);
775
776         return 0;
777 }
778
779 static int ieee80211_change_station(struct wiphy *wiphy,
780                                     struct net_device *dev,
781                                     u8 *mac,
782                                     struct station_parameters *params)
783 {
784         struct ieee80211_local *local = wiphy_priv(wiphy);
785         struct sta_info *sta;
786         struct ieee80211_sub_if_data *vlansdata;
787
788         rcu_read_lock();
789
790         /* XXX: get sta belonging to dev */
791         sta = sta_info_get(local, mac);
792         if (!sta) {
793                 rcu_read_unlock();
794                 return -ENOENT;
795         }
796
797         if (params->vlan && params->vlan != sta->sdata->dev) {
798                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
799
800                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
801                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
802                         rcu_read_unlock();
803                         return -EINVAL;
804                 }
805
806                 sta->sdata = vlansdata;
807                 ieee80211_send_layer2_update(sta);
808         }
809
810         sta_apply_parameters(local, sta, params);
811
812         rcu_read_unlock();
813
814         return 0;
815 }
816
817 #ifdef CONFIG_MAC80211_MESH
818 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
819                                  u8 *dst, u8 *next_hop)
820 {
821         struct ieee80211_local *local = wiphy_priv(wiphy);
822         struct ieee80211_sub_if_data *sdata;
823         struct mesh_path *mpath;
824         struct sta_info *sta;
825         int err;
826
827         if (!netif_running(dev))
828                 return -ENETDOWN;
829
830         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
831
832         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
833                 return -ENOTSUPP;
834
835         rcu_read_lock();
836         sta = sta_info_get(local, next_hop);
837         if (!sta) {
838                 rcu_read_unlock();
839                 return -ENOENT;
840         }
841
842         err = mesh_path_add(dst, sdata);
843         if (err) {
844                 rcu_read_unlock();
845                 return err;
846         }
847
848         mpath = mesh_path_lookup(dst, sdata);
849         if (!mpath) {
850                 rcu_read_unlock();
851                 return -ENXIO;
852         }
853         mesh_path_fix_nexthop(mpath, sta);
854
855         rcu_read_unlock();
856         return 0;
857 }
858
859 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
860                                  u8 *dst)
861 {
862         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
863
864         if (dst)
865                 return mesh_path_del(dst, sdata);
866
867         mesh_path_flush(sdata);
868         return 0;
869 }
870
871 static int ieee80211_change_mpath(struct wiphy *wiphy,
872                                     struct net_device *dev,
873                                     u8 *dst, u8 *next_hop)
874 {
875         struct ieee80211_local *local = wiphy_priv(wiphy);
876         struct ieee80211_sub_if_data *sdata;
877         struct mesh_path *mpath;
878         struct sta_info *sta;
879
880         if (!netif_running(dev))
881                 return -ENETDOWN;
882
883         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
884
885         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
886                 return -ENOTSUPP;
887
888         rcu_read_lock();
889
890         sta = sta_info_get(local, next_hop);
891         if (!sta) {
892                 rcu_read_unlock();
893                 return -ENOENT;
894         }
895
896         mpath = mesh_path_lookup(dst, sdata);
897         if (!mpath) {
898                 rcu_read_unlock();
899                 return -ENOENT;
900         }
901
902         mesh_path_fix_nexthop(mpath, sta);
903
904         rcu_read_unlock();
905         return 0;
906 }
907
908 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
909                             struct mpath_info *pinfo)
910 {
911         if (mpath->next_hop)
912                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
913         else
914                 memset(next_hop, 0, ETH_ALEN);
915
916         pinfo->filled = MPATH_INFO_FRAME_QLEN |
917                         MPATH_INFO_DSN |
918                         MPATH_INFO_METRIC |
919                         MPATH_INFO_EXPTIME |
920                         MPATH_INFO_DISCOVERY_TIMEOUT |
921                         MPATH_INFO_DISCOVERY_RETRIES |
922                         MPATH_INFO_FLAGS;
923
924         pinfo->frame_qlen = mpath->frame_queue.qlen;
925         pinfo->dsn = mpath->dsn;
926         pinfo->metric = mpath->metric;
927         if (time_before(jiffies, mpath->exp_time))
928                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
929         pinfo->discovery_timeout =
930                         jiffies_to_msecs(mpath->discovery_timeout);
931         pinfo->discovery_retries = mpath->discovery_retries;
932         pinfo->flags = 0;
933         if (mpath->flags & MESH_PATH_ACTIVE)
934                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
935         if (mpath->flags & MESH_PATH_RESOLVING)
936                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
937         if (mpath->flags & MESH_PATH_DSN_VALID)
938                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
939         if (mpath->flags & MESH_PATH_FIXED)
940                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
941         if (mpath->flags & MESH_PATH_RESOLVING)
942                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
943
944         pinfo->flags = mpath->flags;
945 }
946
947 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
948                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
949
950 {
951         struct ieee80211_sub_if_data *sdata;
952         struct mesh_path *mpath;
953
954         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
955
956         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
957                 return -ENOTSUPP;
958
959         rcu_read_lock();
960         mpath = mesh_path_lookup(dst, sdata);
961         if (!mpath) {
962                 rcu_read_unlock();
963                 return -ENOENT;
964         }
965         memcpy(dst, mpath->dst, ETH_ALEN);
966         mpath_set_pinfo(mpath, next_hop, pinfo);
967         rcu_read_unlock();
968         return 0;
969 }
970
971 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
972                                  int idx, u8 *dst, u8 *next_hop,
973                                  struct mpath_info *pinfo)
974 {
975         struct ieee80211_sub_if_data *sdata;
976         struct mesh_path *mpath;
977
978         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
979
980         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
981                 return -ENOTSUPP;
982
983         rcu_read_lock();
984         mpath = mesh_path_lookup_by_idx(idx, sdata);
985         if (!mpath) {
986                 rcu_read_unlock();
987                 return -ENOENT;
988         }
989         memcpy(dst, mpath->dst, ETH_ALEN);
990         mpath_set_pinfo(mpath, next_hop, pinfo);
991         rcu_read_unlock();
992         return 0;
993 }
994
995 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
996                                 struct net_device *dev,
997                                 struct mesh_config *conf)
998 {
999         struct ieee80211_sub_if_data *sdata;
1000         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1001
1002         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1003                 return -ENOTSUPP;
1004         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1005         return 0;
1006 }
1007
1008 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1009 {
1010         return (mask >> (parm-1)) & 0x1;
1011 }
1012
1013 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
1014                                 struct net_device *dev,
1015                                 const struct mesh_config *nconf, u32 mask)
1016 {
1017         struct mesh_config *conf;
1018         struct ieee80211_sub_if_data *sdata;
1019         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1020
1021         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1022                 return -ENOTSUPP;
1023
1024         /* Set the config options which we are interested in setting */
1025         conf = &(sdata->u.mesh.mshcfg);
1026         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1027                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1028         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1029                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1030         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1031                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1032         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1033                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1034         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1035                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1036         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1037                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1038         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1039                 conf->auto_open_plinks = nconf->auto_open_plinks;
1040         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1041                 conf->dot11MeshHWMPmaxPREQretries =
1042                         nconf->dot11MeshHWMPmaxPREQretries;
1043         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1044                 conf->path_refresh_time = nconf->path_refresh_time;
1045         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1046                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1047         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1048                 conf->dot11MeshHWMPactivePathTimeout =
1049                         nconf->dot11MeshHWMPactivePathTimeout;
1050         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1051                 conf->dot11MeshHWMPpreqMinInterval =
1052                         nconf->dot11MeshHWMPpreqMinInterval;
1053         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1054                            mask))
1055                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1056                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1057         return 0;
1058 }
1059
1060 #endif
1061
1062 static int ieee80211_change_bss(struct wiphy *wiphy,
1063                                 struct net_device *dev,
1064                                 struct bss_parameters *params)
1065 {
1066         struct ieee80211_sub_if_data *sdata;
1067         u32 changed = 0;
1068
1069         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1070
1071         if (sdata->vif.type != NL80211_IFTYPE_AP)
1072                 return -EINVAL;
1073
1074         if (params->use_cts_prot >= 0) {
1075                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1076                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1077         }
1078         if (params->use_short_preamble >= 0) {
1079                 sdata->vif.bss_conf.use_short_preamble =
1080                         params->use_short_preamble;
1081                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1082         }
1083         if (params->use_short_slot_time >= 0) {
1084                 sdata->vif.bss_conf.use_short_slot =
1085                         params->use_short_slot_time;
1086                 changed |= BSS_CHANGED_ERP_SLOT;
1087         }
1088
1089         if (params->basic_rates) {
1090                 int i, j;
1091                 u32 rates = 0;
1092                 struct ieee80211_local *local = wiphy_priv(wiphy);
1093                 struct ieee80211_supported_band *sband =
1094                         wiphy->bands[local->oper_channel->band];
1095
1096                 for (i = 0; i < params->basic_rates_len; i++) {
1097                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1098                         for (j = 0; j < sband->n_bitrates; j++) {
1099                                 if (sband->bitrates[j].bitrate == rate)
1100                                         rates |= BIT(j);
1101                         }
1102                 }
1103                 sdata->vif.bss_conf.basic_rates = rates;
1104                 changed |= BSS_CHANGED_BASIC_RATES;
1105         }
1106
1107         ieee80211_bss_info_change_notify(sdata, changed);
1108
1109         return 0;
1110 }
1111
1112 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1113                                     struct ieee80211_txq_params *params)
1114 {
1115         struct ieee80211_local *local = wiphy_priv(wiphy);
1116         struct ieee80211_tx_queue_params p;
1117
1118         if (!local->ops->conf_tx)
1119                 return -EOPNOTSUPP;
1120
1121         memset(&p, 0, sizeof(p));
1122         p.aifs = params->aifs;
1123         p.cw_max = params->cwmax;
1124         p.cw_min = params->cwmin;
1125         p.txop = params->txop;
1126         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1127                 printk(KERN_DEBUG "%s: failed to set TX queue "
1128                        "parameters for queue %d\n", local->mdev->name,
1129                        params->queue);
1130                 return -EINVAL;
1131         }
1132
1133         return 0;
1134 }
1135
1136 static int ieee80211_set_channel(struct wiphy *wiphy,
1137                                  struct ieee80211_channel *chan,
1138                                  enum nl80211_channel_type channel_type)
1139 {
1140         struct ieee80211_local *local = wiphy_priv(wiphy);
1141
1142         local->oper_channel = chan;
1143         local->oper_channel_type = channel_type;
1144
1145         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1146 }
1147
1148 struct cfg80211_ops mac80211_config_ops = {
1149         .add_virtual_intf = ieee80211_add_iface,
1150         .del_virtual_intf = ieee80211_del_iface,
1151         .change_virtual_intf = ieee80211_change_iface,
1152         .add_key = ieee80211_add_key,
1153         .del_key = ieee80211_del_key,
1154         .get_key = ieee80211_get_key,
1155         .set_default_key = ieee80211_config_default_key,
1156         .add_beacon = ieee80211_add_beacon,
1157         .set_beacon = ieee80211_set_beacon,
1158         .del_beacon = ieee80211_del_beacon,
1159         .add_station = ieee80211_add_station,
1160         .del_station = ieee80211_del_station,
1161         .change_station = ieee80211_change_station,
1162         .get_station = ieee80211_get_station,
1163         .dump_station = ieee80211_dump_station,
1164 #ifdef CONFIG_MAC80211_MESH
1165         .add_mpath = ieee80211_add_mpath,
1166         .del_mpath = ieee80211_del_mpath,
1167         .change_mpath = ieee80211_change_mpath,
1168         .get_mpath = ieee80211_get_mpath,
1169         .dump_mpath = ieee80211_dump_mpath,
1170         .set_mesh_params = ieee80211_set_mesh_params,
1171         .get_mesh_params = ieee80211_get_mesh_params,
1172 #endif
1173         .change_bss = ieee80211_change_bss,
1174         .set_txq_params = ieee80211_set_txq_params,
1175         .set_channel = ieee80211_set_channel,
1176 };