mac80211: Add capability to enable/disable beaconing
[safe/jmp/linux-2.6] / 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         case WLAN_CIPHER_SUITE_AES_CMAC:
137                 alg = ALG_AES_CMAC;
138                 break;
139         default:
140                 return -EINVAL;
141         }
142
143         key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key);
144         if (!key)
145                 return -ENOMEM;
146
147         rcu_read_lock();
148
149         if (mac_addr) {
150                 sta = sta_info_get(sdata->local, mac_addr);
151                 if (!sta) {
152                         ieee80211_key_free(key);
153                         err = -ENOENT;
154                         goto out_unlock;
155                 }
156         }
157
158         ieee80211_key_link(key, sdata, sta);
159
160         err = 0;
161  out_unlock:
162         rcu_read_unlock();
163
164         return err;
165 }
166
167 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
168                              u8 key_idx, u8 *mac_addr)
169 {
170         struct ieee80211_sub_if_data *sdata;
171         struct sta_info *sta;
172         int ret;
173
174         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
175
176         rcu_read_lock();
177
178         if (mac_addr) {
179                 ret = -ENOENT;
180
181                 sta = sta_info_get(sdata->local, mac_addr);
182                 if (!sta)
183                         goto out_unlock;
184
185                 if (sta->key) {
186                         ieee80211_key_free(sta->key);
187                         WARN_ON(sta->key);
188                         ret = 0;
189                 }
190
191                 goto out_unlock;
192         }
193
194         if (!sdata->keys[key_idx]) {
195                 ret = -ENOENT;
196                 goto out_unlock;
197         }
198
199         ieee80211_key_free(sdata->keys[key_idx]);
200         WARN_ON(sdata->keys[key_idx]);
201
202         ret = 0;
203  out_unlock:
204         rcu_read_unlock();
205
206         return ret;
207 }
208
209 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
210                              u8 key_idx, u8 *mac_addr, void *cookie,
211                              void (*callback)(void *cookie,
212                                               struct key_params *params))
213 {
214         struct ieee80211_sub_if_data *sdata;
215         struct sta_info *sta = NULL;
216         u8 seq[6] = {0};
217         struct key_params params;
218         struct ieee80211_key *key;
219         u32 iv32;
220         u16 iv16;
221         int err = -ENOENT;
222
223         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
224
225         rcu_read_lock();
226
227         if (mac_addr) {
228                 sta = sta_info_get(sdata->local, mac_addr);
229                 if (!sta)
230                         goto out;
231
232                 key = sta->key;
233         } else
234                 key = sdata->keys[key_idx];
235
236         if (!key)
237                 goto out;
238
239         memset(&params, 0, sizeof(params));
240
241         switch (key->conf.alg) {
242         case ALG_TKIP:
243                 params.cipher = WLAN_CIPHER_SUITE_TKIP;
244
245                 iv32 = key->u.tkip.tx.iv32;
246                 iv16 = key->u.tkip.tx.iv16;
247
248                 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
249                     sdata->local->ops->get_tkip_seq)
250                         sdata->local->ops->get_tkip_seq(
251                                 local_to_hw(sdata->local),
252                                 key->conf.hw_key_idx,
253                                 &iv32, &iv16);
254
255                 seq[0] = iv16 & 0xff;
256                 seq[1] = (iv16 >> 8) & 0xff;
257                 seq[2] = iv32 & 0xff;
258                 seq[3] = (iv32 >> 8) & 0xff;
259                 seq[4] = (iv32 >> 16) & 0xff;
260                 seq[5] = (iv32 >> 24) & 0xff;
261                 params.seq = seq;
262                 params.seq_len = 6;
263                 break;
264         case ALG_CCMP:
265                 params.cipher = WLAN_CIPHER_SUITE_CCMP;
266                 seq[0] = key->u.ccmp.tx_pn[5];
267                 seq[1] = key->u.ccmp.tx_pn[4];
268                 seq[2] = key->u.ccmp.tx_pn[3];
269                 seq[3] = key->u.ccmp.tx_pn[2];
270                 seq[4] = key->u.ccmp.tx_pn[1];
271                 seq[5] = key->u.ccmp.tx_pn[0];
272                 params.seq = seq;
273                 params.seq_len = 6;
274                 break;
275         case ALG_WEP:
276                 if (key->conf.keylen == 5)
277                         params.cipher = WLAN_CIPHER_SUITE_WEP40;
278                 else
279                         params.cipher = WLAN_CIPHER_SUITE_WEP104;
280                 break;
281         case ALG_AES_CMAC:
282                 params.cipher = WLAN_CIPHER_SUITE_AES_CMAC;
283                 seq[0] = key->u.aes_cmac.tx_pn[5];
284                 seq[1] = key->u.aes_cmac.tx_pn[4];
285                 seq[2] = key->u.aes_cmac.tx_pn[3];
286                 seq[3] = key->u.aes_cmac.tx_pn[2];
287                 seq[4] = key->u.aes_cmac.tx_pn[1];
288                 seq[5] = key->u.aes_cmac.tx_pn[0];
289                 params.seq = seq;
290                 params.seq_len = 6;
291                 break;
292         }
293
294         params.key = key->conf.key;
295         params.key_len = key->conf.keylen;
296
297         callback(cookie, &params);
298         err = 0;
299
300  out:
301         rcu_read_unlock();
302         return err;
303 }
304
305 static int ieee80211_config_default_key(struct wiphy *wiphy,
306                                         struct net_device *dev,
307                                         u8 key_idx)
308 {
309         struct ieee80211_sub_if_data *sdata;
310
311         rcu_read_lock();
312
313         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
314         ieee80211_set_default_key(sdata, key_idx);
315
316         rcu_read_unlock();
317
318         return 0;
319 }
320
321 static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
322                                              struct net_device *dev,
323                                              u8 key_idx)
324 {
325         struct ieee80211_sub_if_data *sdata;
326
327         rcu_read_lock();
328
329         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
330         ieee80211_set_default_mgmt_key(sdata, key_idx);
331
332         rcu_read_unlock();
333
334         return 0;
335 }
336
337 static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
338 {
339         struct ieee80211_sub_if_data *sdata = sta->sdata;
340
341         sinfo->filled = STATION_INFO_INACTIVE_TIME |
342                         STATION_INFO_RX_BYTES |
343                         STATION_INFO_TX_BYTES |
344                         STATION_INFO_TX_BITRATE;
345
346         sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
347         sinfo->rx_bytes = sta->rx_bytes;
348         sinfo->tx_bytes = sta->tx_bytes;
349
350         if (sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
351                 sinfo->filled |= STATION_INFO_SIGNAL;
352                 sinfo->signal = (s8)sta->last_signal;
353         }
354
355         sinfo->txrate.flags = 0;
356         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
357                 sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
358         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
359                 sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
360         if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
361                 sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
362
363         if (!(sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)) {
364                 struct ieee80211_supported_band *sband;
365                 sband = sta->local->hw.wiphy->bands[
366                                 sta->local->hw.conf.channel->band];
367                 sinfo->txrate.legacy =
368                         sband->bitrates[sta->last_tx_rate.idx].bitrate;
369         } else
370                 sinfo->txrate.mcs = sta->last_tx_rate.idx;
371
372         if (ieee80211_vif_is_mesh(&sdata->vif)) {
373 #ifdef CONFIG_MAC80211_MESH
374                 sinfo->filled |= STATION_INFO_LLID |
375                                  STATION_INFO_PLID |
376                                  STATION_INFO_PLINK_STATE;
377
378                 sinfo->llid = le16_to_cpu(sta->llid);
379                 sinfo->plid = le16_to_cpu(sta->plid);
380                 sinfo->plink_state = sta->plink_state;
381 #endif
382         }
383 }
384
385
386 static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
387                                  int idx, u8 *mac, struct station_info *sinfo)
388 {
389         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
390         struct sta_info *sta;
391         int ret = -ENOENT;
392
393         rcu_read_lock();
394
395         sta = sta_info_get_by_idx(local, idx, dev);
396         if (sta) {
397                 ret = 0;
398                 memcpy(mac, sta->sta.addr, ETH_ALEN);
399                 sta_set_sinfo(sta, sinfo);
400         }
401
402         rcu_read_unlock();
403
404         return ret;
405 }
406
407 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
408                                  u8 *mac, struct station_info *sinfo)
409 {
410         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
411         struct sta_info *sta;
412         int ret = -ENOENT;
413
414         rcu_read_lock();
415
416         /* XXX: verify sta->dev == dev */
417
418         sta = sta_info_get(local, mac);
419         if (sta) {
420                 ret = 0;
421                 sta_set_sinfo(sta, sinfo);
422         }
423
424         rcu_read_unlock();
425
426         return ret;
427 }
428
429 /*
430  * This handles both adding a beacon and setting new beacon info
431  */
432 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
433                                    struct beacon_parameters *params)
434 {
435         struct beacon_data *new, *old;
436         int new_head_len, new_tail_len;
437         int size;
438         int err = -EINVAL;
439
440         old = sdata->u.ap.beacon;
441
442         /* head must not be zero-length */
443         if (params->head && !params->head_len)
444                 return -EINVAL;
445
446         /*
447          * This is a kludge. beacon interval should really be part
448          * of the beacon information.
449          */
450         if (params->interval) {
451                 sdata->local->hw.conf.beacon_int = params->interval;
452                 err = ieee80211_hw_config(sdata->local,
453                                         IEEE80211_CONF_CHANGE_BEACON_INTERVAL);
454                 if (err < 0)
455                         return err;
456                 /*
457                  * We updated some parameter so if below bails out
458                  * it's not an error.
459                  */
460                 err = 0;
461         }
462
463         /* Need to have a beacon head if we don't have one yet */
464         if (!params->head && !old)
465                 return err;
466
467         /* sorry, no way to start beaconing without dtim period */
468         if (!params->dtim_period && !old)
469                 return err;
470
471         /* new or old head? */
472         if (params->head)
473                 new_head_len = params->head_len;
474         else
475                 new_head_len = old->head_len;
476
477         /* new or old tail? */
478         if (params->tail || !old)
479                 /* params->tail_len will be zero for !params->tail */
480                 new_tail_len = params->tail_len;
481         else
482                 new_tail_len = old->tail_len;
483
484         size = sizeof(*new) + new_head_len + new_tail_len;
485
486         new = kzalloc(size, GFP_KERNEL);
487         if (!new)
488                 return -ENOMEM;
489
490         /* start filling the new info now */
491
492         /* new or old dtim period? */
493         if (params->dtim_period)
494                 new->dtim_period = params->dtim_period;
495         else
496                 new->dtim_period = old->dtim_period;
497
498         /*
499          * pointers go into the block we allocated,
500          * memory is | beacon_data | head | tail |
501          */
502         new->head = ((u8 *) new) + sizeof(*new);
503         new->tail = new->head + new_head_len;
504         new->head_len = new_head_len;
505         new->tail_len = new_tail_len;
506
507         /* copy in head */
508         if (params->head)
509                 memcpy(new->head, params->head, new_head_len);
510         else
511                 memcpy(new->head, old->head, new_head_len);
512
513         /* copy in optional tail */
514         if (params->tail)
515                 memcpy(new->tail, params->tail, new_tail_len);
516         else
517                 if (old)
518                         memcpy(new->tail, old->tail, new_tail_len);
519
520         rcu_assign_pointer(sdata->u.ap.beacon, new);
521
522         synchronize_rcu();
523
524         kfree(old);
525
526         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON |
527                                           IEEE80211_IFCC_BEACON_ENABLED);
528 }
529
530 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
531                                 struct beacon_parameters *params)
532 {
533         struct ieee80211_sub_if_data *sdata;
534         struct beacon_data *old;
535
536         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
537
538         if (sdata->vif.type != NL80211_IFTYPE_AP)
539                 return -EINVAL;
540
541         old = sdata->u.ap.beacon;
542
543         if (old)
544                 return -EALREADY;
545
546         return ieee80211_config_beacon(sdata, params);
547 }
548
549 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
550                                 struct beacon_parameters *params)
551 {
552         struct ieee80211_sub_if_data *sdata;
553         struct beacon_data *old;
554
555         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
556
557         if (sdata->vif.type != NL80211_IFTYPE_AP)
558                 return -EINVAL;
559
560         old = sdata->u.ap.beacon;
561
562         if (!old)
563                 return -ENOENT;
564
565         return ieee80211_config_beacon(sdata, params);
566 }
567
568 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
569 {
570         struct ieee80211_sub_if_data *sdata;
571         struct beacon_data *old;
572
573         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
574
575         if (sdata->vif.type != NL80211_IFTYPE_AP)
576                 return -EINVAL;
577
578         old = sdata->u.ap.beacon;
579
580         if (!old)
581                 return -ENOENT;
582
583         rcu_assign_pointer(sdata->u.ap.beacon, NULL);
584         synchronize_rcu();
585         kfree(old);
586
587         return ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON_ENABLED);
588 }
589
590 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
591 struct iapp_layer2_update {
592         u8 da[ETH_ALEN];        /* broadcast */
593         u8 sa[ETH_ALEN];        /* STA addr */
594         __be16 len;             /* 6 */
595         u8 dsap;                /* 0 */
596         u8 ssap;                /* 0 */
597         u8 control;
598         u8 xid_info[3];
599 } __attribute__ ((packed));
600
601 static void ieee80211_send_layer2_update(struct sta_info *sta)
602 {
603         struct iapp_layer2_update *msg;
604         struct sk_buff *skb;
605
606         /* Send Level 2 Update Frame to update forwarding tables in layer 2
607          * bridge devices */
608
609         skb = dev_alloc_skb(sizeof(*msg));
610         if (!skb)
611                 return;
612         msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
613
614         /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
615          * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
616
617         memset(msg->da, 0xff, ETH_ALEN);
618         memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
619         msg->len = htons(6);
620         msg->dsap = 0;
621         msg->ssap = 0x01;       /* NULL LSAP, CR Bit: Response */
622         msg->control = 0xaf;    /* XID response lsb.1111F101.
623                                  * F=0 (no poll command; unsolicited frame) */
624         msg->xid_info[0] = 0x81;        /* XID format identifier */
625         msg->xid_info[1] = 1;   /* LLC types/classes: Type 1 LLC */
626         msg->xid_info[2] = 0;   /* XID sender's receive window size (RW) */
627
628         skb->dev = sta->sdata->dev;
629         skb->protocol = eth_type_trans(skb, sta->sdata->dev);
630         memset(skb->cb, 0, sizeof(skb->cb));
631         netif_rx(skb);
632 }
633
634 static void sta_apply_parameters(struct ieee80211_local *local,
635                                  struct sta_info *sta,
636                                  struct station_parameters *params)
637 {
638         u32 rates;
639         int i, j;
640         struct ieee80211_supported_band *sband;
641         struct ieee80211_sub_if_data *sdata = sta->sdata;
642
643         sband = local->hw.wiphy->bands[local->oper_channel->band];
644
645         /*
646          * FIXME: updating the flags is racy when this function is
647          *        called from ieee80211_change_station(), this will
648          *        be resolved in a future patch.
649          */
650
651         if (params->station_flags & STATION_FLAG_CHANGED) {
652                 spin_lock_bh(&sta->lock);
653                 sta->flags &= ~WLAN_STA_AUTHORIZED;
654                 if (params->station_flags & STATION_FLAG_AUTHORIZED)
655                         sta->flags |= WLAN_STA_AUTHORIZED;
656
657                 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
658                 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
659                         sta->flags |= WLAN_STA_SHORT_PREAMBLE;
660
661                 sta->flags &= ~WLAN_STA_WME;
662                 if (params->station_flags & STATION_FLAG_WME)
663                         sta->flags |= WLAN_STA_WME;
664
665                 sta->flags &= ~WLAN_STA_MFP;
666                 if (params->station_flags & STATION_FLAG_MFP)
667                         sta->flags |= WLAN_STA_MFP;
668                 spin_unlock_bh(&sta->lock);
669         }
670
671         /*
672          * FIXME: updating the following information is racy when this
673          *        function is called from ieee80211_change_station().
674          *        However, all this information should be static so
675          *        maybe we should just reject attemps to change it.
676          */
677
678         if (params->aid) {
679                 sta->sta.aid = params->aid;
680                 if (sta->sta.aid > IEEE80211_MAX_AID)
681                         sta->sta.aid = 0; /* XXX: should this be an error? */
682         }
683
684         if (params->listen_interval >= 0)
685                 sta->listen_interval = params->listen_interval;
686
687         if (params->supported_rates) {
688                 rates = 0;
689
690                 for (i = 0; i < params->supported_rates_len; i++) {
691                         int rate = (params->supported_rates[i] & 0x7f) * 5;
692                         for (j = 0; j < sband->n_bitrates; j++) {
693                                 if (sband->bitrates[j].bitrate == rate)
694                                         rates |= BIT(j);
695                         }
696                 }
697                 sta->sta.supp_rates[local->oper_channel->band] = rates;
698         }
699
700         if (params->ht_capa)
701                 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
702                                                   params->ht_capa,
703                                                   &sta->sta.ht_cap);
704
705         if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
706                 switch (params->plink_action) {
707                 case PLINK_ACTION_OPEN:
708                         mesh_plink_open(sta);
709                         break;
710                 case PLINK_ACTION_BLOCK:
711                         mesh_plink_block(sta);
712                         break;
713                 }
714         }
715 }
716
717 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
718                                  u8 *mac, struct station_parameters *params)
719 {
720         struct ieee80211_local *local = wiphy_priv(wiphy);
721         struct sta_info *sta;
722         struct ieee80211_sub_if_data *sdata;
723         int err;
724         int layer2_update;
725
726         /* Prevent a race with changing the rate control algorithm */
727         if (!netif_running(dev))
728                 return -ENETDOWN;
729
730         if (params->vlan) {
731                 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
732
733                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
734                     sdata->vif.type != NL80211_IFTYPE_AP)
735                         return -EINVAL;
736         } else
737                 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
738
739         if (compare_ether_addr(mac, dev->dev_addr) == 0)
740                 return -EINVAL;
741
742         if (is_multicast_ether_addr(mac))
743                 return -EINVAL;
744
745         sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
746         if (!sta)
747                 return -ENOMEM;
748
749         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
750
751         sta_apply_parameters(local, sta, params);
752
753         rate_control_rate_init(sta);
754
755         layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
756                 sdata->vif.type == NL80211_IFTYPE_AP;
757
758         rcu_read_lock();
759
760         err = sta_info_insert(sta);
761         if (err) {
762                 /* STA has been freed */
763                 if (err == -EEXIST && layer2_update) {
764                         /* Need to update layer 2 devices on reassociation */
765                         sta = sta_info_get(local, mac);
766                         if (sta)
767                                 ieee80211_send_layer2_update(sta);
768                 }
769                 rcu_read_unlock();
770                 return err;
771         }
772
773         if (layer2_update)
774                 ieee80211_send_layer2_update(sta);
775
776         rcu_read_unlock();
777
778         return 0;
779 }
780
781 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
782                                  u8 *mac)
783 {
784         struct ieee80211_local *local = wiphy_priv(wiphy);
785         struct ieee80211_sub_if_data *sdata;
786         struct sta_info *sta;
787
788         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
789
790         if (mac) {
791                 rcu_read_lock();
792
793                 /* XXX: get sta belonging to dev */
794                 sta = sta_info_get(local, mac);
795                 if (!sta) {
796                         rcu_read_unlock();
797                         return -ENOENT;
798                 }
799
800                 sta_info_unlink(&sta);
801                 rcu_read_unlock();
802
803                 sta_info_destroy(sta);
804         } else
805                 sta_info_flush(local, sdata);
806
807         return 0;
808 }
809
810 static int ieee80211_change_station(struct wiphy *wiphy,
811                                     struct net_device *dev,
812                                     u8 *mac,
813                                     struct station_parameters *params)
814 {
815         struct ieee80211_local *local = wiphy_priv(wiphy);
816         struct sta_info *sta;
817         struct ieee80211_sub_if_data *vlansdata;
818
819         rcu_read_lock();
820
821         /* XXX: get sta belonging to dev */
822         sta = sta_info_get(local, mac);
823         if (!sta) {
824                 rcu_read_unlock();
825                 return -ENOENT;
826         }
827
828         if (params->vlan && params->vlan != sta->sdata->dev) {
829                 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
830
831                 if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
832                     vlansdata->vif.type != NL80211_IFTYPE_AP) {
833                         rcu_read_unlock();
834                         return -EINVAL;
835                 }
836
837                 sta->sdata = vlansdata;
838                 ieee80211_send_layer2_update(sta);
839         }
840
841         sta_apply_parameters(local, sta, params);
842
843         rcu_read_unlock();
844
845         return 0;
846 }
847
848 #ifdef CONFIG_MAC80211_MESH
849 static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
850                                  u8 *dst, u8 *next_hop)
851 {
852         struct ieee80211_local *local = wiphy_priv(wiphy);
853         struct ieee80211_sub_if_data *sdata;
854         struct mesh_path *mpath;
855         struct sta_info *sta;
856         int err;
857
858         if (!netif_running(dev))
859                 return -ENETDOWN;
860
861         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
862
863         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
864                 return -ENOTSUPP;
865
866         rcu_read_lock();
867         sta = sta_info_get(local, next_hop);
868         if (!sta) {
869                 rcu_read_unlock();
870                 return -ENOENT;
871         }
872
873         err = mesh_path_add(dst, sdata);
874         if (err) {
875                 rcu_read_unlock();
876                 return err;
877         }
878
879         mpath = mesh_path_lookup(dst, sdata);
880         if (!mpath) {
881                 rcu_read_unlock();
882                 return -ENXIO;
883         }
884         mesh_path_fix_nexthop(mpath, sta);
885
886         rcu_read_unlock();
887         return 0;
888 }
889
890 static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
891                                  u8 *dst)
892 {
893         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
894
895         if (dst)
896                 return mesh_path_del(dst, sdata);
897
898         mesh_path_flush(sdata);
899         return 0;
900 }
901
902 static int ieee80211_change_mpath(struct wiphy *wiphy,
903                                     struct net_device *dev,
904                                     u8 *dst, u8 *next_hop)
905 {
906         struct ieee80211_local *local = wiphy_priv(wiphy);
907         struct ieee80211_sub_if_data *sdata;
908         struct mesh_path *mpath;
909         struct sta_info *sta;
910
911         if (!netif_running(dev))
912                 return -ENETDOWN;
913
914         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
915
916         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
917                 return -ENOTSUPP;
918
919         rcu_read_lock();
920
921         sta = sta_info_get(local, next_hop);
922         if (!sta) {
923                 rcu_read_unlock();
924                 return -ENOENT;
925         }
926
927         mpath = mesh_path_lookup(dst, sdata);
928         if (!mpath) {
929                 rcu_read_unlock();
930                 return -ENOENT;
931         }
932
933         mesh_path_fix_nexthop(mpath, sta);
934
935         rcu_read_unlock();
936         return 0;
937 }
938
939 static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
940                             struct mpath_info *pinfo)
941 {
942         if (mpath->next_hop)
943                 memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
944         else
945                 memset(next_hop, 0, ETH_ALEN);
946
947         pinfo->filled = MPATH_INFO_FRAME_QLEN |
948                         MPATH_INFO_DSN |
949                         MPATH_INFO_METRIC |
950                         MPATH_INFO_EXPTIME |
951                         MPATH_INFO_DISCOVERY_TIMEOUT |
952                         MPATH_INFO_DISCOVERY_RETRIES |
953                         MPATH_INFO_FLAGS;
954
955         pinfo->frame_qlen = mpath->frame_queue.qlen;
956         pinfo->dsn = mpath->dsn;
957         pinfo->metric = mpath->metric;
958         if (time_before(jiffies, mpath->exp_time))
959                 pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
960         pinfo->discovery_timeout =
961                         jiffies_to_msecs(mpath->discovery_timeout);
962         pinfo->discovery_retries = mpath->discovery_retries;
963         pinfo->flags = 0;
964         if (mpath->flags & MESH_PATH_ACTIVE)
965                 pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
966         if (mpath->flags & MESH_PATH_RESOLVING)
967                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
968         if (mpath->flags & MESH_PATH_DSN_VALID)
969                 pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
970         if (mpath->flags & MESH_PATH_FIXED)
971                 pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
972         if (mpath->flags & MESH_PATH_RESOLVING)
973                 pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
974
975         pinfo->flags = mpath->flags;
976 }
977
978 static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
979                                u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
980
981 {
982         struct ieee80211_sub_if_data *sdata;
983         struct mesh_path *mpath;
984
985         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
986
987         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
988                 return -ENOTSUPP;
989
990         rcu_read_lock();
991         mpath = mesh_path_lookup(dst, sdata);
992         if (!mpath) {
993                 rcu_read_unlock();
994                 return -ENOENT;
995         }
996         memcpy(dst, mpath->dst, ETH_ALEN);
997         mpath_set_pinfo(mpath, next_hop, pinfo);
998         rcu_read_unlock();
999         return 0;
1000 }
1001
1002 static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
1003                                  int idx, u8 *dst, u8 *next_hop,
1004                                  struct mpath_info *pinfo)
1005 {
1006         struct ieee80211_sub_if_data *sdata;
1007         struct mesh_path *mpath;
1008
1009         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1010
1011         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1012                 return -ENOTSUPP;
1013
1014         rcu_read_lock();
1015         mpath = mesh_path_lookup_by_idx(idx, sdata);
1016         if (!mpath) {
1017                 rcu_read_unlock();
1018                 return -ENOENT;
1019         }
1020         memcpy(dst, mpath->dst, ETH_ALEN);
1021         mpath_set_pinfo(mpath, next_hop, pinfo);
1022         rcu_read_unlock();
1023         return 0;
1024 }
1025
1026 static int ieee80211_get_mesh_params(struct wiphy *wiphy,
1027                                 struct net_device *dev,
1028                                 struct mesh_config *conf)
1029 {
1030         struct ieee80211_sub_if_data *sdata;
1031         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032
1033         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1034                 return -ENOTSUPP;
1035         memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
1036         return 0;
1037 }
1038
1039 static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
1040 {
1041         return (mask >> (parm-1)) & 0x1;
1042 }
1043
1044 static int ieee80211_set_mesh_params(struct wiphy *wiphy,
1045                                 struct net_device *dev,
1046                                 const struct mesh_config *nconf, u32 mask)
1047 {
1048         struct mesh_config *conf;
1049         struct ieee80211_sub_if_data *sdata;
1050         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1051
1052         if (sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
1053                 return -ENOTSUPP;
1054
1055         /* Set the config options which we are interested in setting */
1056         conf = &(sdata->u.mesh.mshcfg);
1057         if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
1058                 conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
1059         if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
1060                 conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
1061         if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
1062                 conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
1063         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
1064                 conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
1065         if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
1066                 conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
1067         if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
1068                 conf->dot11MeshTTL = nconf->dot11MeshTTL;
1069         if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
1070                 conf->auto_open_plinks = nconf->auto_open_plinks;
1071         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
1072                 conf->dot11MeshHWMPmaxPREQretries =
1073                         nconf->dot11MeshHWMPmaxPREQretries;
1074         if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
1075                 conf->path_refresh_time = nconf->path_refresh_time;
1076         if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
1077                 conf->min_discovery_timeout = nconf->min_discovery_timeout;
1078         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
1079                 conf->dot11MeshHWMPactivePathTimeout =
1080                         nconf->dot11MeshHWMPactivePathTimeout;
1081         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
1082                 conf->dot11MeshHWMPpreqMinInterval =
1083                         nconf->dot11MeshHWMPpreqMinInterval;
1084         if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
1085                            mask))
1086                 conf->dot11MeshHWMPnetDiameterTraversalTime =
1087                         nconf->dot11MeshHWMPnetDiameterTraversalTime;
1088         return 0;
1089 }
1090
1091 #endif
1092
1093 static int ieee80211_change_bss(struct wiphy *wiphy,
1094                                 struct net_device *dev,
1095                                 struct bss_parameters *params)
1096 {
1097         struct ieee80211_sub_if_data *sdata;
1098         u32 changed = 0;
1099
1100         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1101
1102         if (sdata->vif.type != NL80211_IFTYPE_AP)
1103                 return -EINVAL;
1104
1105         if (params->use_cts_prot >= 0) {
1106                 sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
1107                 changed |= BSS_CHANGED_ERP_CTS_PROT;
1108         }
1109         if (params->use_short_preamble >= 0) {
1110                 sdata->vif.bss_conf.use_short_preamble =
1111                         params->use_short_preamble;
1112                 changed |= BSS_CHANGED_ERP_PREAMBLE;
1113         }
1114         if (params->use_short_slot_time >= 0) {
1115                 sdata->vif.bss_conf.use_short_slot =
1116                         params->use_short_slot_time;
1117                 changed |= BSS_CHANGED_ERP_SLOT;
1118         }
1119
1120         if (params->basic_rates) {
1121                 int i, j;
1122                 u32 rates = 0;
1123                 struct ieee80211_local *local = wiphy_priv(wiphy);
1124                 struct ieee80211_supported_band *sband =
1125                         wiphy->bands[local->oper_channel->band];
1126
1127                 for (i = 0; i < params->basic_rates_len; i++) {
1128                         int rate = (params->basic_rates[i] & 0x7f) * 5;
1129                         for (j = 0; j < sband->n_bitrates; j++) {
1130                                 if (sband->bitrates[j].bitrate == rate)
1131                                         rates |= BIT(j);
1132                         }
1133                 }
1134                 sdata->vif.bss_conf.basic_rates = rates;
1135                 changed |= BSS_CHANGED_BASIC_RATES;
1136         }
1137
1138         ieee80211_bss_info_change_notify(sdata, changed);
1139
1140         return 0;
1141 }
1142
1143 static int ieee80211_set_txq_params(struct wiphy *wiphy,
1144                                     struct ieee80211_txq_params *params)
1145 {
1146         struct ieee80211_local *local = wiphy_priv(wiphy);
1147         struct ieee80211_tx_queue_params p;
1148
1149         if (!local->ops->conf_tx)
1150                 return -EOPNOTSUPP;
1151
1152         memset(&p, 0, sizeof(p));
1153         p.aifs = params->aifs;
1154         p.cw_max = params->cwmax;
1155         p.cw_min = params->cwmin;
1156         p.txop = params->txop;
1157         if (local->ops->conf_tx(local_to_hw(local), params->queue, &p)) {
1158                 printk(KERN_DEBUG "%s: failed to set TX queue "
1159                        "parameters for queue %d\n", local->mdev->name,
1160                        params->queue);
1161                 return -EINVAL;
1162         }
1163
1164         return 0;
1165 }
1166
1167 static int ieee80211_set_channel(struct wiphy *wiphy,
1168                                  struct ieee80211_channel *chan,
1169                                  enum nl80211_channel_type channel_type)
1170 {
1171         struct ieee80211_local *local = wiphy_priv(wiphy);
1172
1173         local->oper_channel = chan;
1174         local->oper_channel_type = channel_type;
1175
1176         return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
1177 }
1178
1179 static int set_mgmt_extra_ie_sta(struct ieee80211_if_sta *ifsta, u8 subtype,
1180                                  u8 *ies, size_t ies_len)
1181 {
1182         switch (subtype) {
1183         case IEEE80211_STYPE_PROBE_REQ >> 4:
1184                 kfree(ifsta->ie_probereq);
1185                 ifsta->ie_probereq = ies;
1186                 ifsta->ie_probereq_len = ies_len;
1187                 return 0;
1188         case IEEE80211_STYPE_PROBE_RESP >> 4:
1189                 kfree(ifsta->ie_proberesp);
1190                 ifsta->ie_proberesp = ies;
1191                 ifsta->ie_proberesp_len = ies_len;
1192                 return 0;
1193         case IEEE80211_STYPE_AUTH >> 4:
1194                 kfree(ifsta->ie_auth);
1195                 ifsta->ie_auth = ies;
1196                 ifsta->ie_auth_len = ies_len;
1197                 return 0;
1198         case IEEE80211_STYPE_ASSOC_REQ >> 4:
1199                 kfree(ifsta->ie_assocreq);
1200                 ifsta->ie_assocreq = ies;
1201                 ifsta->ie_assocreq_len = ies_len;
1202                 return 0;
1203         case IEEE80211_STYPE_REASSOC_REQ >> 4:
1204                 kfree(ifsta->ie_reassocreq);
1205                 ifsta->ie_reassocreq = ies;
1206                 ifsta->ie_reassocreq_len = ies_len;
1207                 return 0;
1208         case IEEE80211_STYPE_DEAUTH >> 4:
1209                 kfree(ifsta->ie_deauth);
1210                 ifsta->ie_deauth = ies;
1211                 ifsta->ie_deauth_len = ies_len;
1212                 return 0;
1213         case IEEE80211_STYPE_DISASSOC >> 4:
1214                 kfree(ifsta->ie_disassoc);
1215                 ifsta->ie_disassoc = ies;
1216                 ifsta->ie_disassoc_len = ies_len;
1217                 return 0;
1218         }
1219
1220         return -EOPNOTSUPP;
1221 }
1222
1223 static int ieee80211_set_mgmt_extra_ie(struct wiphy *wiphy,
1224                                        struct net_device *dev,
1225                                        struct mgmt_extra_ie_params *params)
1226 {
1227         struct ieee80211_sub_if_data *sdata;
1228         u8 *ies;
1229         size_t ies_len;
1230         int ret = -EOPNOTSUPP;
1231
1232         if (params->ies) {
1233                 ies = kmemdup(params->ies, params->ies_len, GFP_KERNEL);
1234                 if (ies == NULL)
1235                         return -ENOMEM;
1236                 ies_len = params->ies_len;
1237         } else {
1238                 ies = NULL;
1239                 ies_len = 0;
1240         }
1241
1242         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1243
1244         switch (sdata->vif.type) {
1245         case NL80211_IFTYPE_STATION:
1246         case NL80211_IFTYPE_ADHOC:
1247                 ret = set_mgmt_extra_ie_sta(&sdata->u.sta, params->subtype,
1248                                             ies, ies_len);
1249                 break;
1250         default:
1251                 ret = -EOPNOTSUPP;
1252                 break;
1253         }
1254
1255         if (ret)
1256                 kfree(ies);
1257         return ret;
1258 }
1259
1260 #ifdef CONFIG_PM
1261 static int ieee80211_suspend(struct wiphy *wiphy)
1262 {
1263         return __ieee80211_suspend(wiphy_priv(wiphy));
1264 }
1265
1266 static int ieee80211_resume(struct wiphy *wiphy)
1267 {
1268         return __ieee80211_resume(wiphy_priv(wiphy));
1269 }
1270 #else
1271 #define ieee80211_suspend NULL
1272 #define ieee80211_resume NULL
1273 #endif
1274
1275 struct cfg80211_ops mac80211_config_ops = {
1276         .add_virtual_intf = ieee80211_add_iface,
1277         .del_virtual_intf = ieee80211_del_iface,
1278         .change_virtual_intf = ieee80211_change_iface,
1279         .add_key = ieee80211_add_key,
1280         .del_key = ieee80211_del_key,
1281         .get_key = ieee80211_get_key,
1282         .set_default_key = ieee80211_config_default_key,
1283         .set_default_mgmt_key = ieee80211_config_default_mgmt_key,
1284         .add_beacon = ieee80211_add_beacon,
1285         .set_beacon = ieee80211_set_beacon,
1286         .del_beacon = ieee80211_del_beacon,
1287         .add_station = ieee80211_add_station,
1288         .del_station = ieee80211_del_station,
1289         .change_station = ieee80211_change_station,
1290         .get_station = ieee80211_get_station,
1291         .dump_station = ieee80211_dump_station,
1292 #ifdef CONFIG_MAC80211_MESH
1293         .add_mpath = ieee80211_add_mpath,
1294         .del_mpath = ieee80211_del_mpath,
1295         .change_mpath = ieee80211_change_mpath,
1296         .get_mpath = ieee80211_get_mpath,
1297         .dump_mpath = ieee80211_dump_mpath,
1298         .set_mesh_params = ieee80211_set_mesh_params,
1299         .get_mesh_params = ieee80211_get_mesh_params,
1300 #endif
1301         .change_bss = ieee80211_change_bss,
1302         .set_txq_params = ieee80211_set_txq_params,
1303         .set_channel = ieee80211_set_channel,
1304         .set_mgmt_extra_ie = ieee80211_set_mgmt_extra_ie,
1305         .suspend = ieee80211_suspend,
1306         .resume = ieee80211_resume,
1307 };