2 * mac80211 configuration hooks for cfg80211
4 * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
6 * This file is GPLv2 as found in COPYING.
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"
17 #include "ieee80211_rate.h"
19 static enum ieee80211_if_types
20 nl80211_type_to_mac80211_type(enum nl80211_iftype type)
23 case NL80211_IFTYPE_UNSPECIFIED:
24 return IEEE80211_IF_TYPE_STA;
25 case NL80211_IFTYPE_ADHOC:
26 return IEEE80211_IF_TYPE_IBSS;
27 case NL80211_IFTYPE_STATION:
28 return IEEE80211_IF_TYPE_STA;
29 case NL80211_IFTYPE_MONITOR:
30 return IEEE80211_IF_TYPE_MNTR;
32 return IEEE80211_IF_TYPE_INVALID;
36 static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
37 enum nl80211_iftype type, u32 *flags)
39 struct ieee80211_local *local = wiphy_priv(wiphy);
40 enum ieee80211_if_types itype;
41 struct net_device *dev;
42 struct ieee80211_sub_if_data *sdata;
45 if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
48 itype = nl80211_type_to_mac80211_type(type);
49 if (itype == IEEE80211_IF_TYPE_INVALID)
52 err = ieee80211_if_add(local->mdev, name, &dev, itype);
53 if (err || itype != IEEE80211_IF_TYPE_MNTR || !flags)
56 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
57 sdata->u.mntr_flags = *flags;
61 static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
63 struct ieee80211_local *local = wiphy_priv(wiphy);
64 struct net_device *dev;
67 if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
70 /* we're under RTNL */
71 dev = __dev_get_by_index(&init_net, ifindex);
77 return ieee80211_if_remove(local->mdev, name, -1);
80 static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex,
81 enum nl80211_iftype type, u32 *flags)
83 struct ieee80211_local *local = wiphy_priv(wiphy);
84 struct net_device *dev;
85 enum ieee80211_if_types itype;
86 struct ieee80211_sub_if_data *sdata;
88 if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED))
91 /* we're under RTNL */
92 dev = __dev_get_by_index(&init_net, ifindex);
96 if (netif_running(dev))
99 itype = nl80211_type_to_mac80211_type(type);
100 if (itype == IEEE80211_IF_TYPE_INVALID)
103 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
105 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
108 ieee80211_if_reinit(dev);
109 ieee80211_if_set_type(dev, itype);
111 if (sdata->vif.type != IEEE80211_IF_TYPE_MNTR || !flags)
114 sdata->u.mntr_flags = *flags;
118 static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
119 u8 key_idx, u8 *mac_addr,
120 struct key_params *params)
122 struct ieee80211_sub_if_data *sdata;
123 struct sta_info *sta = NULL;
124 enum ieee80211_key_alg alg;
127 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
129 switch (params->cipher) {
130 case WLAN_CIPHER_SUITE_WEP40:
131 case WLAN_CIPHER_SUITE_WEP104:
134 case WLAN_CIPHER_SUITE_TKIP:
137 case WLAN_CIPHER_SUITE_CCMP:
145 sta = sta_info_get(sdata->local, mac_addr);
151 if (!ieee80211_key_alloc(sdata, sta, alg, key_idx,
152 params->key_len, params->key))
161 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
162 u8 key_idx, u8 *mac_addr)
164 struct ieee80211_sub_if_data *sdata;
165 struct sta_info *sta;
168 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
171 sta = sta_info_get(sdata->local, mac_addr);
177 ieee80211_key_free(sta->key);
185 if (!sdata->keys[key_idx])
188 ieee80211_key_free(sdata->keys[key_idx]);
193 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
194 u8 key_idx, u8 *mac_addr, void *cookie,
195 void (*callback)(void *cookie,
196 struct key_params *params))
198 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
199 struct sta_info *sta = NULL;
201 struct key_params params;
202 struct ieee80211_key *key;
208 sta = sta_info_get(sdata->local, mac_addr);
214 key = sdata->keys[key_idx];
219 memset(¶ms, 0, sizeof(params));
221 switch (key->conf.alg) {
223 params.cipher = WLAN_CIPHER_SUITE_TKIP;
225 iv32 = key->u.tkip.iv32;
226 iv16 = key->u.tkip.iv16;
228 if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
229 sdata->local->ops->get_tkip_seq)
230 sdata->local->ops->get_tkip_seq(
231 local_to_hw(sdata->local),
232 key->conf.hw_key_idx,
235 seq[0] = iv16 & 0xff;
236 seq[1] = (iv16 >> 8) & 0xff;
237 seq[2] = iv32 & 0xff;
238 seq[3] = (iv32 >> 8) & 0xff;
239 seq[4] = (iv32 >> 16) & 0xff;
240 seq[5] = (iv32 >> 24) & 0xff;
245 params.cipher = WLAN_CIPHER_SUITE_CCMP;
246 seq[0] = key->u.ccmp.tx_pn[5];
247 seq[1] = key->u.ccmp.tx_pn[4];
248 seq[2] = key->u.ccmp.tx_pn[3];
249 seq[3] = key->u.ccmp.tx_pn[2];
250 seq[4] = key->u.ccmp.tx_pn[1];
251 seq[5] = key->u.ccmp.tx_pn[0];
256 if (key->conf.keylen == 5)
257 params.cipher = WLAN_CIPHER_SUITE_WEP40;
259 params.cipher = WLAN_CIPHER_SUITE_WEP104;
263 params.key = key->conf.key;
264 params.key_len = key->conf.keylen;
266 callback(cookie, ¶ms);
275 static int ieee80211_config_default_key(struct wiphy *wiphy,
276 struct net_device *dev,
279 struct ieee80211_sub_if_data *sdata;
281 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
282 ieee80211_set_default_key(sdata, key_idx);
287 static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
288 u8 *mac, struct station_stats *stats)
290 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
291 struct sta_info *sta;
293 sta = sta_info_get(local, mac);
297 /* XXX: verify sta->dev == dev */
299 stats->filled = STATION_STAT_INACTIVE_TIME |
300 STATION_STAT_RX_BYTES |
301 STATION_STAT_TX_BYTES;
303 stats->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
304 stats->rx_bytes = sta->rx_bytes;
305 stats->tx_bytes = sta->tx_bytes;
313 * This handles both adding a beacon and setting new beacon info
315 static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
316 struct beacon_parameters *params)
318 struct beacon_data *new, *old;
319 int new_head_len, new_tail_len;
323 old = sdata->u.ap.beacon;
325 /* head must not be zero-length */
326 if (params->head && !params->head_len)
330 * This is a kludge. beacon interval should really be part
331 * of the beacon information.
333 if (params->interval) {
334 sdata->local->hw.conf.beacon_int = params->interval;
335 if (ieee80211_hw_config(sdata->local))
338 * We updated some parameter so if below bails out
344 /* Need to have a beacon head if we don't have one yet */
345 if (!params->head && !old)
348 /* sorry, no way to start beaconing without dtim period */
349 if (!params->dtim_period && !old)
352 /* new or old head? */
354 new_head_len = params->head_len;
356 new_head_len = old->head_len;
358 /* new or old tail? */
359 if (params->tail || !old)
360 /* params->tail_len will be zero for !params->tail */
361 new_tail_len = params->tail_len;
363 new_tail_len = old->tail_len;
365 size = sizeof(*new) + new_head_len + new_tail_len;
367 new = kzalloc(size, GFP_KERNEL);
371 /* start filling the new info now */
373 /* new or old dtim period? */
374 if (params->dtim_period)
375 new->dtim_period = params->dtim_period;
377 new->dtim_period = old->dtim_period;
380 * pointers go into the block we allocated,
381 * memory is | beacon_data | head | tail |
383 new->head = ((u8 *) new) + sizeof(*new);
384 new->tail = new->head + new_head_len;
385 new->head_len = new_head_len;
386 new->tail_len = new_tail_len;
390 memcpy(new->head, params->head, new_head_len);
392 memcpy(new->head, old->head, new_head_len);
394 /* copy in optional tail */
396 memcpy(new->tail, params->tail, new_tail_len);
399 memcpy(new->tail, old->tail, new_tail_len);
401 rcu_assign_pointer(sdata->u.ap.beacon, new);
407 return ieee80211_if_config_beacon(sdata->dev);
410 static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
411 struct beacon_parameters *params)
413 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
414 struct beacon_data *old;
416 if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
419 old = sdata->u.ap.beacon;
424 return ieee80211_config_beacon(sdata, params);
427 static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
428 struct beacon_parameters *params)
430 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
431 struct beacon_data *old;
433 if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
436 old = sdata->u.ap.beacon;
441 return ieee80211_config_beacon(sdata, params);
444 static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
446 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
447 struct beacon_data *old;
449 if (sdata->vif.type != IEEE80211_IF_TYPE_AP)
452 old = sdata->u.ap.beacon;
457 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
461 return ieee80211_if_config_beacon(dev);
464 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
465 struct iapp_layer2_update {
466 u8 da[ETH_ALEN]; /* broadcast */
467 u8 sa[ETH_ALEN]; /* STA addr */
473 } __attribute__ ((packed));
475 static void ieee80211_send_layer2_update(struct sta_info *sta)
477 struct iapp_layer2_update *msg;
480 /* Send Level 2 Update Frame to update forwarding tables in layer 2
483 skb = dev_alloc_skb(sizeof(*msg));
486 msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
488 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
489 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
491 memset(msg->da, 0xff, ETH_ALEN);
492 memcpy(msg->sa, sta->addr, ETH_ALEN);
495 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
496 msg->control = 0xaf; /* XID response lsb.1111F101.
497 * F=0 (no poll command; unsolicited frame) */
498 msg->xid_info[0] = 0x81; /* XID format identifier */
499 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
500 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
503 skb->protocol = eth_type_trans(skb, sta->dev);
504 memset(skb->cb, 0, sizeof(skb->cb));
508 static void sta_apply_parameters(struct ieee80211_local *local,
509 struct sta_info *sta,
510 struct station_parameters *params)
514 struct ieee80211_supported_band *sband;
516 if (params->station_flags & STATION_FLAG_CHANGED) {
517 sta->flags &= ~WLAN_STA_AUTHORIZED;
518 if (params->station_flags & STATION_FLAG_AUTHORIZED)
519 sta->flags |= WLAN_STA_AUTHORIZED;
521 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
522 if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE)
523 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
525 sta->flags &= ~WLAN_STA_WME;
526 if (params->station_flags & STATION_FLAG_WME)
527 sta->flags |= WLAN_STA_WME;
531 sta->aid = params->aid;
532 if (sta->aid > IEEE80211_MAX_AID)
533 sta->aid = 0; /* XXX: should this be an error? */
536 if (params->listen_interval >= 0)
537 sta->listen_interval = params->listen_interval;
539 if (params->supported_rates) {
541 sband = local->hw.wiphy->bands[local->oper_channel->band];
543 for (i = 0; i < params->supported_rates_len; i++) {
544 int rate = (params->supported_rates[i] & 0x7f) * 5;
545 for (j = 0; j < sband->n_bitrates; j++) {
546 if (sband->bitrates[j].bitrate == rate)
550 sta->supp_rates[local->oper_channel->band] = rates;
554 static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
555 u8 *mac, struct station_parameters *params)
557 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
558 struct sta_info *sta;
559 struct ieee80211_sub_if_data *sdata;
561 /* Prevent a race with changing the rate control algorithm */
562 if (!netif_running(dev))
565 /* XXX: get sta belonging to dev */
566 sta = sta_info_get(local, mac);
573 sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
575 if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
576 sdata->vif.type != IEEE80211_IF_TYPE_AP)
579 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
581 sta = sta_info_add(local, dev, mac, GFP_KERNEL);
585 sta->dev = sdata->dev;
586 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN ||
587 sdata->vif.type == IEEE80211_IF_TYPE_AP)
588 ieee80211_send_layer2_update(sta);
590 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
592 sta_apply_parameters(local, sta, params);
594 rate_control_rate_init(sta, local);
601 static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
604 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
605 struct sta_info *sta;
608 /* XXX: get sta belonging to dev */
609 sta = sta_info_get(local, mac);
616 sta_info_flush(local, dev);
621 static int ieee80211_change_station(struct wiphy *wiphy,
622 struct net_device *dev,
624 struct station_parameters *params)
626 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
627 struct sta_info *sta;
628 struct ieee80211_sub_if_data *vlansdata;
630 /* XXX: get sta belonging to dev */
631 sta = sta_info_get(local, mac);
635 if (params->vlan && params->vlan != sta->dev) {
636 vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
638 if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
639 vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
642 sta->dev = params->vlan;
643 ieee80211_send_layer2_update(sta);
646 sta_apply_parameters(local, sta, params);
653 struct cfg80211_ops mac80211_config_ops = {
654 .add_virtual_intf = ieee80211_add_iface,
655 .del_virtual_intf = ieee80211_del_iface,
656 .change_virtual_intf = ieee80211_change_iface,
657 .add_key = ieee80211_add_key,
658 .del_key = ieee80211_del_key,
659 .get_key = ieee80211_get_key,
660 .set_default_key = ieee80211_config_default_key,
661 .add_beacon = ieee80211_add_beacon,
662 .set_beacon = ieee80211_set_beacon,
663 .del_beacon = ieee80211_del_beacon,
664 .add_station = ieee80211_add_station,
665 .del_station = ieee80211_del_station,
666 .change_station = ieee80211_change_station,
667 .get_station = ieee80211_get_station,