blob: 5d30dd463f2279381eb3214ffafff5e9f71f80e1 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <net/mac80211.h>
12#include <net/ieee80211_radiotap.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
21#include <linux/wireless.h>
22#include <linux/rtnetlink.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <linux/bitmap.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include <net/cfg80211.h>
26
Jiri Bencf0706e82007-05-05 11:45:53 -070027#include "ieee80211_i.h"
28#include "ieee80211_rate.h"
Luis Carlos Cobof7a92142008-02-23 15:17:18 +010029#include "mesh.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070030#include "wep.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070031#include "wme.h"
32#include "aes_ccm.h"
33#include "ieee80211_led.h"
Michael Wue0eb6852007-09-18 17:29:21 -040034#include "cfg.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070035#include "debugfs.h"
36#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070037
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +020038#define SUPP_MCS_SET_LEN 16
39
Johannes Bergb306f452007-07-10 19:32:08 +020040/*
41 * For seeing transmitted packets on monitor interfaces
42 * we have a radiotap header too.
43 */
44struct ieee80211_tx_status_rtap_hdr {
45 struct ieee80211_radiotap_header hdr;
46 __le16 tx_flags;
47 u8 data_retries;
48} __attribute__ ((packed));
49
Johannes Bergb2c258f2007-07-27 15:43:23 +020050/* common interface routines */
Jiri Bencf0706e82007-05-05 11:45:53 -070051
Stephen Hemmingerb95cce32007-09-26 22:13:38 -070052static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
Jiri Bencf0706e82007-05-05 11:45:53 -070053{
Johannes Bergb2c258f2007-07-27 15:43:23 +020054 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
55 return ETH_ALEN;
Jiri Bencf0706e82007-05-05 11:45:53 -070056}
57
Johannes Berg4150c572007-09-17 01:29:23 -040058/* must be called under mdev tx lock */
59static void ieee80211_configure_filter(struct ieee80211_local *local)
60{
61 unsigned int changed_flags;
62 unsigned int new_flags = 0;
63
Johannes Berg53918992007-09-26 15:19:47 +020064 if (atomic_read(&local->iff_promiscs))
Johannes Berg4150c572007-09-17 01:29:23 -040065 new_flags |= FIF_PROMISC_IN_BSS;
66
Johannes Berg53918992007-09-26 15:19:47 +020067 if (atomic_read(&local->iff_allmultis))
Johannes Berg4150c572007-09-17 01:29:23 -040068 new_flags |= FIF_ALLMULTI;
69
70 if (local->monitors)
Michael Wu8cc9a732008-01-31 19:48:23 +010071 new_flags |= FIF_BCN_PRBRESP_PROMISC;
72
73 if (local->fif_fcsfail)
74 new_flags |= FIF_FCSFAIL;
75
76 if (local->fif_plcpfail)
77 new_flags |= FIF_PLCPFAIL;
78
79 if (local->fif_control)
80 new_flags |= FIF_CONTROL;
81
82 if (local->fif_other_bss)
83 new_flags |= FIF_OTHER_BSS;
Johannes Berg4150c572007-09-17 01:29:23 -040084
85 changed_flags = local->filter_flags ^ new_flags;
86
87 /* be a bit nasty */
88 new_flags |= (1<<31);
89
90 local->ops->configure_filter(local_to_hw(local),
91 changed_flags, &new_flags,
92 local->mdev->mc_count,
93 local->mdev->mc_list);
94
95 WARN_ON(new_flags & (1<<31));
96
97 local->filter_flags = new_flags & ~(1<<31);
98}
99
Johannes Bergb2c258f2007-07-27 15:43:23 +0200100/* master interface */
Jiri Bencf0706e82007-05-05 11:45:53 -0700101
102static int ieee80211_master_open(struct net_device *dev)
103{
104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
105 struct ieee80211_sub_if_data *sdata;
106 int res = -EOPNOTSUPP;
107
Johannes Berg79010422007-09-18 17:29:21 -0400108 /* we hold the RTNL here so can safely walk the list */
109 list_for_each_entry(sdata, &local->interfaces, list) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700110 if (sdata->dev != dev && netif_running(sdata->dev)) {
111 res = 0;
112 break;
113 }
114 }
Jiri Bencf0706e82007-05-05 11:45:53 -0700115 return res;
116}
117
118static int ieee80211_master_stop(struct net_device *dev)
119{
120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
121 struct ieee80211_sub_if_data *sdata;
122
Johannes Berg79010422007-09-18 17:29:21 -0400123 /* we hold the RTNL here so can safely walk the list */
124 list_for_each_entry(sdata, &local->interfaces, list)
Jiri Bencf0706e82007-05-05 11:45:53 -0700125 if (sdata->dev != dev && netif_running(sdata->dev))
126 dev_close(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700127
128 return 0;
129}
130
Johannes Berg4150c572007-09-17 01:29:23 -0400131static void ieee80211_master_set_multicast_list(struct net_device *dev)
132{
133 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
134
135 ieee80211_configure_filter(local);
136}
137
Johannes Bergb2c258f2007-07-27 15:43:23 +0200138/* regular interfaces */
139
140static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
141{
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100142 int meshhdrlen;
143 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
144
145 meshhdrlen = (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT) ? 5 : 0;
146
Johannes Bergb2c258f2007-07-27 15:43:23 +0200147 /* FIX: what would be proper limits for MTU?
148 * This interface uses 802.3 frames. */
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100149 if (new_mtu < 256 ||
150 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200151 printk(KERN_WARNING "%s: invalid MTU %d\n",
152 dev->name, new_mtu);
153 return -EINVAL;
154 }
155
156#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
157 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
158#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
159 dev->mtu = new_mtu;
160 return 0;
161}
162
163static inline int identical_mac_addr_allowed(int type1, int type2)
164{
165 return (type1 == IEEE80211_IF_TYPE_MNTR ||
166 type2 == IEEE80211_IF_TYPE_MNTR ||
167 (type1 == IEEE80211_IF_TYPE_AP &&
168 type2 == IEEE80211_IF_TYPE_WDS) ||
169 (type1 == IEEE80211_IF_TYPE_WDS &&
170 (type2 == IEEE80211_IF_TYPE_WDS ||
171 type2 == IEEE80211_IF_TYPE_AP)) ||
172 (type1 == IEEE80211_IF_TYPE_AP &&
173 type2 == IEEE80211_IF_TYPE_VLAN) ||
174 (type1 == IEEE80211_IF_TYPE_VLAN &&
175 (type2 == IEEE80211_IF_TYPE_AP ||
176 type2 == IEEE80211_IF_TYPE_VLAN)));
177}
178
Johannes Bergb2c258f2007-07-27 15:43:23 +0200179static int ieee80211_open(struct net_device *dev)
180{
181 struct ieee80211_sub_if_data *sdata, *nsdata;
182 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
183 struct ieee80211_if_init_conf conf;
184 int res;
Michael Bueschceffefd2008-02-10 14:16:52 +0100185 bool need_hw_reconfig = 0;
Johannes Berg44213b52008-02-25 16:27:49 +0100186 struct sta_info *sta;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200187
188 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400189
Johannes Berg79010422007-09-18 17:29:21 -0400190 /* we hold the RTNL here so can safely walk the list */
191 list_for_each_entry(nsdata, &local->interfaces, list) {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200192 struct net_device *ndev = nsdata->dev;
193
Johannes Berg665e8aa2008-02-21 01:10:07 +0100194 if (ndev != dev && ndev != local->mdev && netif_running(ndev)) {
195 /*
196 * Allow only a single IBSS interface to be up at any
197 * time. This is restricted because beacon distribution
198 * cannot work properly if both are in the same IBSS.
199 *
200 * To remove this restriction we'd have to disallow them
201 * from setting the same SSID on different IBSS interfaces
202 * belonging to the same hardware. Then, however, we're
203 * faced with having to adopt two different TSF timers...
204 */
205 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
206 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS)
207 return -EBUSY;
208
209 /*
210 * Disallow multiple IBSS/STA mode interfaces.
211 *
212 * This is a technical restriction, it is possible although
213 * most likely not IEEE 802.11 compliant to have multiple
214 * STAs with just a single hardware (the TSF timer will not
215 * be adjusted properly.)
216 *
217 * However, because mac80211 uses the master device's BSS
218 * information for each STA/IBSS interface, doing this will
219 * currently corrupt that BSS information completely, unless,
220 * a not very useful case, both STAs are associated to the
221 * same BSS.
222 *
223 * To remove this restriction, the BSS information needs to
224 * be embedded in the STA/IBSS mode sdata instead of using
225 * the master device's BSS structure.
226 */
227 if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
228 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) &&
229 (nsdata->vif.type == IEEE80211_IF_TYPE_STA ||
230 nsdata->vif.type == IEEE80211_IF_TYPE_IBSS))
231 return -EBUSY;
232
233 /*
234 * The remaining checks are only performed for interfaces
235 * with the same MAC address.
236 */
237 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
238 continue;
239
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400240 /*
241 * check whether it may have the same address
242 */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100243 if (!identical_mac_addr_allowed(sdata->vif.type,
244 nsdata->vif.type))
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400245 return -ENOTUNIQ;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400246
247 /*
248 * can only add VLANs to enabled APs
249 */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100250 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN &&
Johannes Berg665e8aa2008-02-21 01:10:07 +0100251 nsdata->vif.type == IEEE80211_IF_TYPE_AP)
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400252 sdata->u.vlan.ap = nsdata;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200253 }
254 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200255
Johannes Berg51fb61e2007-12-19 01:31:27 +0100256 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400257 case IEEE80211_IF_TYPE_WDS:
258 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
259 return -ENOLINK;
Johannes Berg44213b52008-02-25 16:27:49 +0100260
261 /* Create STA entry for the WDS peer */
262 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
263 GFP_KERNEL);
264 if (!sta)
265 return -ENOMEM;
266
267 sta->flags |= WLAN_STA_AUTHORIZED;
268
269 res = sta_info_insert(sta);
270 if (res) {
Johannes Berg93e5deb2008-04-01 15:21:00 +0200271 /* STA has been freed */
Johannes Berg44213b52008-02-25 16:27:49 +0100272 return res;
273 }
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400274 break;
275 case IEEE80211_IF_TYPE_VLAN:
276 if (!sdata->u.vlan.ap)
277 return -ENOLINK;
278 break;
Johannes Bergfb1c1cd2007-09-26 15:19:43 +0200279 case IEEE80211_IF_TYPE_AP:
Johannes Bergfb1c1cd2007-09-26 15:19:43 +0200280 case IEEE80211_IF_TYPE_STA:
281 case IEEE80211_IF_TYPE_MNTR:
282 case IEEE80211_IF_TYPE_IBSS:
Johannes Berg6032f932008-02-23 15:17:07 +0100283 case IEEE80211_IF_TYPE_MESH_POINT:
Johannes Bergfb1c1cd2007-09-26 15:19:43 +0200284 /* no special treatment */
285 break;
Johannes Berga2897552007-09-28 14:01:25 +0200286 case IEEE80211_IF_TYPE_INVALID:
287 /* cannot happen */
288 WARN_ON(1);
289 break;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400290 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200291
Johannes Bergb2c258f2007-07-27 15:43:23 +0200292 if (local->open_count == 0) {
293 res = 0;
Johannes Berg4150c572007-09-17 01:29:23 -0400294 if (local->ops->start)
295 res = local->ops->start(local_to_hw(local));
296 if (res)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200297 return res;
Michael Bueschceffefd2008-02-10 14:16:52 +0100298 need_hw_reconfig = 1;
Ivo van Doorncdcb0062008-01-07 19:45:24 +0100299 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200300 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200301
Johannes Berg51fb61e2007-12-19 01:31:27 +0100302 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400303 case IEEE80211_IF_TYPE_VLAN:
304 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
305 /* no need to tell driver */
306 break;
Johannes Berg4150c572007-09-17 01:29:23 -0400307 case IEEE80211_IF_TYPE_MNTR:
Michael Wu3d30d942008-01-31 19:48:27 +0100308 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
309 local->cooked_mntrs++;
310 break;
311 }
312
Johannes Berg4150c572007-09-17 01:29:23 -0400313 /* must be before the call to ieee80211_configure_filter */
Johannes Bergb2c258f2007-07-27 15:43:23 +0200314 local->monitors++;
Michael Wu8cc9a732008-01-31 19:48:23 +0100315 if (local->monitors == 1)
Johannes Berg4150c572007-09-17 01:29:23 -0400316 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
Michael Wu8cc9a732008-01-31 19:48:23 +0100317
318 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
319 local->fif_fcsfail++;
320 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
321 local->fif_plcpfail++;
322 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
323 local->fif_control++;
324 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
325 local->fif_other_bss++;
326
327 netif_tx_lock_bh(local->mdev);
328 ieee80211_configure_filter(local);
329 netif_tx_unlock_bh(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -0400330 break;
331 case IEEE80211_IF_TYPE_STA:
332 case IEEE80211_IF_TYPE_IBSS:
333 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
334 /* fall through */
335 default:
Johannes Berg32bfd352007-12-19 01:31:26 +0100336 conf.vif = &sdata->vif;
Johannes Berg51fb61e2007-12-19 01:31:27 +0100337 conf.type = sdata->vif.type;
Johannes Berg4150c572007-09-17 01:29:23 -0400338 conf.mac_addr = dev->dev_addr;
339 res = local->ops->add_interface(local_to_hw(local), &conf);
340 if (res && !local->open_count && local->ops->stop)
341 local->ops->stop(local_to_hw(local));
342 if (res)
343 return res;
344
Johannes Bergb2c258f2007-07-27 15:43:23 +0200345 ieee80211_if_config(dev);
Daniel Draked9430a32007-07-27 15:43:24 +0200346 ieee80211_reset_erp_info(dev);
Johannes Berg11a843b2007-08-28 17:01:55 -0400347 ieee80211_enable_keys(sdata);
Johannes Berg4150c572007-09-17 01:29:23 -0400348
Johannes Berg51fb61e2007-12-19 01:31:27 +0100349 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
Johannes Bergddd3d2b2007-09-26 17:53:20 +0200350 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
Johannes Berg4150c572007-09-17 01:29:23 -0400351 netif_carrier_off(dev);
352 else
353 netif_carrier_on(dev);
Daniel Draked9430a32007-07-27 15:43:24 +0200354 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200355
Johannes Berg4150c572007-09-17 01:29:23 -0400356 if (local->open_count == 0) {
357 res = dev_open(local->mdev);
358 WARN_ON(res);
Johannes Berg4150c572007-09-17 01:29:23 -0400359 tasklet_enable(&local->tx_pending_tasklet);
360 tasklet_enable(&local->tasklet);
361 }
362
Johannes Bergc1428b32007-11-16 02:54:53 +0100363 /*
364 * set_multicast_list will be invoked by the networking core
365 * which will check whether any increments here were done in
366 * error and sync them down to the hardware as filter flags.
367 */
368 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
369 atomic_inc(&local->iff_allmultis);
370
371 if (sdata->flags & IEEE80211_SDATA_PROMISC)
372 atomic_inc(&local->iff_promiscs);
373
Johannes Berg4150c572007-09-17 01:29:23 -0400374 local->open_count++;
Michael Bueschceffefd2008-02-10 14:16:52 +0100375 if (need_hw_reconfig)
376 ieee80211_hw_config(local);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200377
Jan Niehusmann64f851e2008-03-23 20:23:56 +0100378 /*
379 * ieee80211_sta_work is disabled while network interface
380 * is down. Therefore, some configuration changes may not
381 * yet be effective. Trigger execution of ieee80211_sta_work
382 * to fix this.
383 */
384 if(sdata->vif.type == IEEE80211_IF_TYPE_STA ||
385 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
386 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
387 queue_work(local->hw.workqueue, &ifsta->work);
388 }
389
Johannes Bergb2c258f2007-07-27 15:43:23 +0200390 netif_start_queue(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400391
Johannes Bergb2c258f2007-07-27 15:43:23 +0200392 return 0;
393}
394
Johannes Berg4150c572007-09-17 01:29:23 -0400395static int ieee80211_stop(struct net_device *dev)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200396{
Johannes Berg44213b52008-02-25 16:27:49 +0100397 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
398 struct ieee80211_local *local = sdata->local;
Johannes Berg4150c572007-09-17 01:29:23 -0400399 struct ieee80211_if_init_conf conf;
Ron Rindjunsky07db2182007-12-25 17:00:33 +0200400 struct sta_info *sta;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200401
Johannes Berg44213b52008-02-25 16:27:49 +0100402 /*
403 * Stop TX on this interface first.
404 */
405 netif_stop_queue(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400406
Johannes Berg44213b52008-02-25 16:27:49 +0100407 /*
408 * Now delete all active aggregation sessions.
409 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100410 rcu_read_lock();
411
412 list_for_each_entry_rcu(sta, &local->sta_list, list) {
413 if (sta->sdata == sdata)
Ron Rindjunsky85249e52008-03-18 15:00:32 -0700414 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
Ron Rindjunsky07db2182007-12-25 17:00:33 +0200415 }
416
Johannes Bergd0709a62008-02-25 16:27:46 +0100417 rcu_read_unlock();
418
Johannes Berg44213b52008-02-25 16:27:49 +0100419 /*
420 * Remove all stations associated with this interface.
421 *
422 * This must be done before calling ops->remove_interface()
423 * because otherwise we can later invoke ops->sta_notify()
424 * whenever the STAs are removed, and that invalidates driver
425 * assumptions about always getting a vif pointer that is valid
426 * (because if we remove a STA after ops->remove_interface()
427 * the driver will have removed the vif info already!)
428 *
429 * We could relax this and only unlink the stations from the
430 * hash table and list but keep them on a per-sdata list that
431 * will be inserted back again when the interface is brought
432 * up again, but I don't currently see a use case for that,
433 * except with WDS which gets a STA entry created when it is
434 * brought up.
435 */
436 sta_info_flush(local, sdata);
Johannes Berg4150c572007-09-17 01:29:23 -0400437
Johannes Bergc1428b32007-11-16 02:54:53 +0100438 /*
439 * Don't count this interface for promisc/allmulti while it
440 * is down. dev_mc_unsync() will invoke set_multicast_list
441 * on the master interface which will sync these down to the
442 * hardware as filter flags.
443 */
444 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
445 atomic_dec(&local->iff_allmultis);
446
447 if (sdata->flags & IEEE80211_SDATA_PROMISC)
448 atomic_dec(&local->iff_promiscs);
449
Johannes Berg4150c572007-09-17 01:29:23 -0400450 dev_mc_unsync(local->mdev, dev);
451
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100452 /* APs need special treatment */
Johannes Berg51fb61e2007-12-19 01:31:27 +0100453 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400454 struct ieee80211_sub_if_data *vlan, *tmp;
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100455 struct beacon_data *old_beacon = sdata->u.ap.beacon;
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400456
Johannes Berg5dfdaf52007-12-19 02:03:33 +0100457 /* remove beacon */
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
459 synchronize_rcu();
460 kfree(old_beacon);
461
462 /* down all dependent devices, that is VLANs */
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400463 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
464 u.vlan.list)
465 dev_close(vlan->dev);
466 WARN_ON(!list_empty(&sdata->u.ap.vlans));
467 }
468
Johannes Berg4150c572007-09-17 01:29:23 -0400469 local->open_count--;
470
Johannes Berg51fb61e2007-12-19 01:31:27 +0100471 switch (sdata->vif.type) {
Johannes Berg0ec3ca42007-09-17 01:29:24 -0400472 case IEEE80211_IF_TYPE_VLAN:
473 list_del(&sdata->u.vlan.list);
474 sdata->u.vlan.ap = NULL;
475 /* no need to tell driver */
476 break;
Johannes Berg4150c572007-09-17 01:29:23 -0400477 case IEEE80211_IF_TYPE_MNTR:
Michael Wu3d30d942008-01-31 19:48:27 +0100478 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
479 local->cooked_mntrs--;
480 break;
481 }
482
Johannes Berg4150c572007-09-17 01:29:23 -0400483 local->monitors--;
Michael Wu8cc9a732008-01-31 19:48:23 +0100484 if (local->monitors == 0)
Michael Wu8b393f12007-11-28 01:57:08 -0500485 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
Michael Wu8cc9a732008-01-31 19:48:23 +0100486
487 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
488 local->fif_fcsfail--;
489 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
490 local->fif_plcpfail--;
491 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
492 local->fif_control--;
493 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
494 local->fif_other_bss--;
495
496 netif_tx_lock_bh(local->mdev);
497 ieee80211_configure_filter(local);
498 netif_tx_unlock_bh(local->mdev);
Johannes Berg4150c572007-09-17 01:29:23 -0400499 break;
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100500 case IEEE80211_IF_TYPE_MESH_POINT:
Johannes Bergb2c258f2007-07-27 15:43:23 +0200501 case IEEE80211_IF_TYPE_STA:
502 case IEEE80211_IF_TYPE_IBSS:
503 sdata->u.sta.state = IEEE80211_DISABLED;
504 del_timer_sync(&sdata->u.sta.timer);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400505 /*
Johannes Berg79010422007-09-18 17:29:21 -0400506 * When we get here, the interface is marked down.
507 * Call synchronize_rcu() to wait for the RX path
508 * should it be using the interface and enqueuing
509 * frames at this very time on another CPU.
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400510 */
Johannes Berg79010422007-09-18 17:29:21 -0400511 synchronize_rcu();
Johannes Bergb2c258f2007-07-27 15:43:23 +0200512 skb_queue_purge(&sdata->u.sta.skb_queue);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400513
Zhu Yiece8edd2007-11-22 10:53:21 +0800514 if (local->scan_dev == sdata->dev) {
515 if (!local->ops->hw_scan) {
516 local->sta_sw_scanning = 0;
517 cancel_delayed_work(&local->scan_work);
518 } else
519 local->sta_hw_scanning = 0;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200520 }
Zhu Yiece8edd2007-11-22 10:53:21 +0800521
Johannes Bergb2c258f2007-07-27 15:43:23 +0200522 flush_workqueue(local->hw.workqueue);
Zhu Yia10605e2007-11-22 11:10:22 +0800523
524 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
525 kfree(sdata->u.sta.extra_ie);
526 sdata->u.sta.extra_ie = NULL;
527 sdata->u.sta.extra_ie_len = 0;
Johannes Berg4150c572007-09-17 01:29:23 -0400528 /* fall through */
529 default:
Johannes Berg32bfd352007-12-19 01:31:26 +0100530 conf.vif = &sdata->vif;
Johannes Berg51fb61e2007-12-19 01:31:27 +0100531 conf.type = sdata->vif.type;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200532 conf.mac_addr = dev->dev_addr;
Johannes Berg4150c572007-09-17 01:29:23 -0400533 /* disable all keys for as long as this netdev is down */
534 ieee80211_disable_keys(sdata);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200535 local->ops->remove_interface(local_to_hw(local), &conf);
536 }
537
Johannes Berg4150c572007-09-17 01:29:23 -0400538 if (local->open_count == 0) {
539 if (netif_running(local->mdev))
540 dev_close(local->mdev);
541
Johannes Berg4150c572007-09-17 01:29:23 -0400542 if (local->ops->stop)
543 local->ops->stop(local_to_hw(local));
544
Ivo van Doorncdcb0062008-01-07 19:45:24 +0100545 ieee80211_led_radio(local, 0);
546
Johannes Berg4150c572007-09-17 01:29:23 -0400547 tasklet_disable(&local->tx_pending_tasklet);
548 tasklet_disable(&local->tasklet);
549 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200550
551 return 0;
552}
553
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200554int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
555{
556 struct ieee80211_local *local = hw_to_local(hw);
557 struct sta_info *sta;
558 struct ieee80211_sub_if_data *sdata;
559 u16 start_seq_num = 0;
560 u8 *state;
561 int ret;
562 DECLARE_MAC_BUF(mac);
563
564 if (tid >= STA_TID_NUM)
565 return -EINVAL;
566
567#ifdef CONFIG_MAC80211_HT_DEBUG
568 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
569 print_mac(mac, ra), tid);
570#endif /* CONFIG_MAC80211_HT_DEBUG */
571
Johannes Bergd0709a62008-02-25 16:27:46 +0100572 rcu_read_lock();
573
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200574 sta = sta_info_get(local, ra);
575 if (!sta) {
576 printk(KERN_DEBUG "Could not find the station\n");
Johannes Bergd0709a62008-02-25 16:27:46 +0100577 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200578 return -ENOENT;
579 }
580
581 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
582
583 /* we have tried too many times, receiver does not want A-MPDU */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200584 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200585 ret = -EBUSY;
586 goto start_ba_exit;
587 }
588
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200589 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200590 /* check if the TID is not in aggregation flow already */
591 if (*state != HT_AGG_STATE_IDLE) {
592#ifdef CONFIG_MAC80211_HT_DEBUG
593 printk(KERN_DEBUG "BA request denied - session is not "
594 "idle on tid %u\n", tid);
595#endif /* CONFIG_MAC80211_HT_DEBUG */
596 ret = -EAGAIN;
597 goto start_ba_exit;
598 }
599
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200600 /* prepare A-MPDU MLME for Tx aggregation */
601 sta->ampdu_mlme.tid_tx[tid] =
602 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
603 if (!sta->ampdu_mlme.tid_tx[tid]) {
604 if (net_ratelimit())
605 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
606 tid);
607 ret = -ENOMEM;
608 goto start_ba_exit;
609 }
610 /* Tx timer */
611 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
612 sta_addba_resp_timer_expired;
613 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
614 (unsigned long)&sta->timer_to_tid[tid];
615 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
616
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200617 /* ensure that TX flow won't interrupt us
618 * until the end of the call to requeue function */
619 spin_lock_bh(&local->mdev->queue_lock);
620
621 /* create a new queue for this aggregation */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200622 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200623
624 /* case no queue is available to aggregation
625 * don't switch to aggregation */
626 if (ret) {
627#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200628 printk(KERN_DEBUG "BA request denied - queue unavailable for"
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200629 " tid %d\n", tid);
630#endif /* CONFIG_MAC80211_HT_DEBUG */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200631 goto start_ba_err;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200632 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100633 sdata = sta->sdata;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200634
635 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
636 * call back right away, it must see that the flow has begun */
637 *state |= HT_ADDBA_REQUESTED_MSK;
638
639 if (local->ops->ampdu_action)
640 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
641 ra, tid, &start_seq_num);
642
643 if (ret) {
644 /* No need to requeue the packets in the agg queue, since we
645 * held the tx lock: no packet could be enqueued to the newly
646 * allocated queue */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200647 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200648#ifdef CONFIG_MAC80211_HT_DEBUG
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200649 printk(KERN_DEBUG "BA request denied - HW unavailable for"
650 " tid %d\n", tid);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200651#endif /* CONFIG_MAC80211_HT_DEBUG */
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200652 *state = HT_AGG_STATE_IDLE;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200653 goto start_ba_err;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200654 }
655
656 /* Will put all the packets in the new SW queue */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200657 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200658 spin_unlock_bh(&local->mdev->queue_lock);
659
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200660 /* send an addBA request */
661 sta->ampdu_mlme.dialog_token_allocator++;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200662 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200663 sta->ampdu_mlme.dialog_token_allocator;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200664 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200665
Johannes Bergd0709a62008-02-25 16:27:46 +0100666 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200667 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
668 sta->ampdu_mlme.tid_tx[tid]->ssn,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200669 0x40, 5000);
670
671 /* activate the timer for the recipient's addBA response */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200672 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200673 jiffies + ADDBA_RESP_INTERVAL;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200674 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200675 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200676 goto start_ba_exit;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200677
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200678start_ba_err:
679 kfree(sta->ampdu_mlme.tid_tx[tid]);
680 sta->ampdu_mlme.tid_tx[tid] = NULL;
681 spin_unlock_bh(&local->mdev->queue_lock);
682 ret = -EBUSY;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200683start_ba_exit:
684 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100685 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200686 return ret;
687}
688EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
689
690int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
691 u8 *ra, u16 tid,
692 enum ieee80211_back_parties initiator)
693{
694 struct ieee80211_local *local = hw_to_local(hw);
695 struct sta_info *sta;
696 u8 *state;
697 int ret = 0;
698 DECLARE_MAC_BUF(mac);
699
700 if (tid >= STA_TID_NUM)
701 return -EINVAL;
702
703#ifdef CONFIG_MAC80211_HT_DEBUG
704 printk(KERN_DEBUG "Stop a BA session requested for %s tid %u\n",
705 print_mac(mac, ra), tid);
706#endif /* CONFIG_MAC80211_HT_DEBUG */
707
Johannes Bergd0709a62008-02-25 16:27:46 +0100708 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200709 sta = sta_info_get(local, ra);
Johannes Bergd0709a62008-02-25 16:27:46 +0100710 if (!sta) {
711 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200712 return -ENOENT;
Johannes Bergd0709a62008-02-25 16:27:46 +0100713 }
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200714
715 /* check if the TID is in aggregation */
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200716 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200717 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
718
719 if (*state != HT_AGG_STATE_OPERATIONAL) {
720#ifdef CONFIG_MAC80211_HT_DEBUG
721 printk(KERN_DEBUG "Try to stop Tx aggregation on"
722 " non active TID\n");
723#endif /* CONFIG_MAC80211_HT_DEBUG */
724 ret = -ENOENT;
725 goto stop_BA_exit;
726 }
727
728 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
729
730 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
731 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
732
733 if (local->ops->ampdu_action)
734 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
735 ra, tid, NULL);
736
737 /* case HW denied going back to legacy */
738 if (ret) {
739 WARN_ON(ret != -EBUSY);
740 *state = HT_AGG_STATE_OPERATIONAL;
741 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
742 goto stop_BA_exit;
743 }
744
745stop_BA_exit:
746 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100747 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200748 return ret;
749}
750EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
751
752void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
753{
754 struct ieee80211_local *local = hw_to_local(hw);
755 struct sta_info *sta;
756 u8 *state;
757 DECLARE_MAC_BUF(mac);
758
759 if (tid >= STA_TID_NUM) {
760 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
761 tid, STA_TID_NUM);
762 return;
763 }
764
Johannes Bergd0709a62008-02-25 16:27:46 +0100765 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200766 sta = sta_info_get(local, ra);
767 if (!sta) {
Johannes Bergd0709a62008-02-25 16:27:46 +0100768 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200769 printk(KERN_DEBUG "Could not find station: %s\n",
770 print_mac(mac, ra));
771 return;
772 }
773
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200774 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200775 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
776
777 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
778 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
779 *state);
780 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100781 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200782 return;
783 }
784
785 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
786
787 *state |= HT_ADDBA_DRV_READY_MSK;
788
789 if (*state == HT_AGG_STATE_OPERATIONAL) {
790 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
791 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
792 }
793 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100794 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200795}
796EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
797
798void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
799{
800 struct ieee80211_local *local = hw_to_local(hw);
801 struct sta_info *sta;
802 u8 *state;
803 int agg_queue;
804 DECLARE_MAC_BUF(mac);
805
806 if (tid >= STA_TID_NUM) {
807 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
808 tid, STA_TID_NUM);
809 return;
810 }
811
812 printk(KERN_DEBUG "Stop a BA session requested on DA %s tid %d\n",
813 print_mac(mac, ra), tid);
814
Johannes Bergd0709a62008-02-25 16:27:46 +0100815 rcu_read_lock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200816 sta = sta_info_get(local, ra);
817 if (!sta) {
818 printk(KERN_DEBUG "Could not find station: %s\n",
819 print_mac(mac, ra));
Johannes Bergd0709a62008-02-25 16:27:46 +0100820 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200821 return;
822 }
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200823 state = &sta->ampdu_mlme.tid_state_tx[tid];
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200824
825 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
826 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
827 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200828 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100829 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200830 return;
831 }
832
833 if (*state & HT_AGG_STATE_INITIATOR_MSK)
Johannes Bergd0709a62008-02-25 16:27:46 +0100834 ieee80211_send_delba(sta->sdata->dev, ra, tid,
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200835 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
836
837 agg_queue = sta->tid_to_tx_q[tid];
838
839 /* avoid ordering issues: we are the only one that can modify
840 * the content of the qdiscs */
841 spin_lock_bh(&local->mdev->queue_lock);
842 /* remove the queue for this aggregation */
Ron Rindjunsky9e723492008-01-28 14:07:18 +0200843 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200844 spin_unlock_bh(&local->mdev->queue_lock);
845
846 /* we just requeued the all the frames that were in the removed
847 * queue, and since we might miss a softirq we do netif_schedule.
848 * ieee80211_wake_queue is not used here as this queue is not
849 * necessarily stopped */
850 netif_schedule(local->mdev);
851 *state = HT_AGG_STATE_IDLE;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200852 sta->ampdu_mlme.addba_req_num[tid] = 0;
853 kfree(sta->ampdu_mlme.tid_tx[tid]);
854 sta->ampdu_mlme.tid_tx[tid] = NULL;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200855 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
856
Johannes Bergd0709a62008-02-25 16:27:46 +0100857 rcu_read_unlock();
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +0200858}
859EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
860
861void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
862 const u8 *ra, u16 tid)
863{
864 struct ieee80211_local *local = hw_to_local(hw);
865 struct ieee80211_ra_tid *ra_tid;
866 struct sk_buff *skb = dev_alloc_skb(0);
867
868 if (unlikely(!skb)) {
869 if (net_ratelimit())
870 printk(KERN_WARNING "%s: Not enough memory, "
871 "dropping start BA session", skb->dev->name);
872 return;
873 }
874 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
875 memcpy(&ra_tid->ra, ra, ETH_ALEN);
876 ra_tid->tid = tid;
877
878 skb->pkt_type = IEEE80211_ADDBA_MSG;
879 skb_queue_tail(&local->skb_queue, skb);
880 tasklet_schedule(&local->tasklet);
881}
882EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
883
884void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
885 const u8 *ra, u16 tid)
886{
887 struct ieee80211_local *local = hw_to_local(hw);
888 struct ieee80211_ra_tid *ra_tid;
889 struct sk_buff *skb = dev_alloc_skb(0);
890
891 if (unlikely(!skb)) {
892 if (net_ratelimit())
893 printk(KERN_WARNING "%s: Not enough memory, "
894 "dropping stop BA session", skb->dev->name);
895 return;
896 }
897 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
898 memcpy(&ra_tid->ra, ra, ETH_ALEN);
899 ra_tid->tid = tid;
900
901 skb->pkt_type = IEEE80211_DELBA_MSG;
902 skb_queue_tail(&local->skb_queue, skb);
903 tasklet_schedule(&local->tasklet);
904}
905EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
906
Johannes Bergb2c258f2007-07-27 15:43:23 +0200907static void ieee80211_set_multicast_list(struct net_device *dev)
908{
909 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
910 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg4150c572007-09-17 01:29:23 -0400911 int allmulti, promisc, sdata_allmulti, sdata_promisc;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200912
Johannes Berg4150c572007-09-17 01:29:23 -0400913 allmulti = !!(dev->flags & IFF_ALLMULTI);
914 promisc = !!(dev->flags & IFF_PROMISC);
Johannes Bergb52f2192007-11-16 01:49:11 +0100915 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
916 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
Johannes Berg4150c572007-09-17 01:29:23 -0400917
918 if (allmulti != sdata_allmulti) {
919 if (dev->flags & IFF_ALLMULTI)
Johannes Berg53918992007-09-26 15:19:47 +0200920 atomic_inc(&local->iff_allmultis);
Johannes Berg4150c572007-09-17 01:29:23 -0400921 else
Johannes Berg53918992007-09-26 15:19:47 +0200922 atomic_dec(&local->iff_allmultis);
Jiri Slaby13262ff2007-08-28 17:01:54 -0400923 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200924 }
Johannes Berg4150c572007-09-17 01:29:23 -0400925
926 if (promisc != sdata_promisc) {
927 if (dev->flags & IFF_PROMISC)
Johannes Berg53918992007-09-26 15:19:47 +0200928 atomic_inc(&local->iff_promiscs);
Johannes Berg4150c572007-09-17 01:29:23 -0400929 else
Johannes Berg53918992007-09-26 15:19:47 +0200930 atomic_dec(&local->iff_promiscs);
Jiri Slaby13262ff2007-08-28 17:01:54 -0400931 sdata->flags ^= IEEE80211_SDATA_PROMISC;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200932 }
Johannes Berg4150c572007-09-17 01:29:23 -0400933
934 dev_mc_sync(local->mdev, dev);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200935}
936
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700937static const struct header_ops ieee80211_header_ops = {
938 .create = eth_header,
939 .parse = header_parse_80211,
940 .rebuild = eth_rebuild_header,
941 .cache = eth_header_cache,
942 .cache_update = eth_header_cache_update,
943};
944
Johannes Bergf9d540e2007-09-28 14:02:09 +0200945/* Must not be called for mdev */
Johannes Bergb2c258f2007-07-27 15:43:23 +0200946void ieee80211_if_setup(struct net_device *dev)
947{
948 ether_setup(dev);
949 dev->hard_start_xmit = ieee80211_subif_start_xmit;
950 dev->wireless_handlers = &ieee80211_iw_handler_def;
951 dev->set_multicast_list = ieee80211_set_multicast_list;
952 dev->change_mtu = ieee80211_change_mtu;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200953 dev->open = ieee80211_open;
954 dev->stop = ieee80211_stop;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200955 dev->destructor = ieee80211_if_free;
956}
957
Johannes Bergb2c258f2007-07-27 15:43:23 +0200958/* everything else */
959
Johannes Bergb2c258f2007-07-27 15:43:23 +0200960static int __ieee80211_if_config(struct net_device *dev,
961 struct sk_buff *beacon,
962 struct ieee80211_tx_control *control)
963{
964 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
965 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
966 struct ieee80211_if_conf conf;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200967
968 if (!local->ops->config_interface || !netif_running(dev))
969 return 0;
970
971 memset(&conf, 0, sizeof(conf));
Johannes Berg51fb61e2007-12-19 01:31:27 +0100972 conf.type = sdata->vif.type;
973 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
974 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
Johannes Berg4150c572007-09-17 01:29:23 -0400975 conf.bssid = sdata->u.sta.bssid;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200976 conf.ssid = sdata->u.sta.ssid;
977 conf.ssid_len = sdata->u.sta.ssid_len;
Johannes Berg902acc72008-02-23 15:17:19 +0100978 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100979 conf.beacon = beacon;
980 ieee80211_start_mesh(dev);
Johannes Berg51fb61e2007-12-19 01:31:27 +0100981 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200982 conf.ssid = sdata->u.ap.ssid;
983 conf.ssid_len = sdata->u.ap.ssid_len;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200984 conf.beacon = beacon;
985 conf.beacon_control = control;
986 }
987 return local->ops->config_interface(local_to_hw(local),
Johannes Berg32bfd352007-12-19 01:31:26 +0100988 &sdata->vif, &conf);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200989}
990
991int ieee80211_if_config(struct net_device *dev)
992{
Luis Carlos Cobof7a92142008-02-23 15:17:18 +0100993 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
994 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
995 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
996 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
997 return ieee80211_if_config_beacon(dev);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200998 return __ieee80211_if_config(dev, NULL, NULL);
999}
1000
1001int ieee80211_if_config_beacon(struct net_device *dev)
1002{
1003 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1004 struct ieee80211_tx_control control;
Johannes Berg32bfd352007-12-19 01:31:26 +01001005 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Bergb2c258f2007-07-27 15:43:23 +02001006 struct sk_buff *skb;
1007
1008 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1009 return 0;
Johannes Berg32bfd352007-12-19 01:31:26 +01001010 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif,
1011 &control);
Johannes Bergb2c258f2007-07-27 15:43:23 +02001012 if (!skb)
1013 return -ENOMEM;
1014 return __ieee80211_if_config(dev, skb, &control);
1015}
1016
1017int ieee80211_hw_config(struct ieee80211_local *local)
1018{
Johannes Bergb2c258f2007-07-27 15:43:23 +02001019 struct ieee80211_channel *chan;
1020 int ret = 0;
1021
Johannes Berg8318d782008-01-24 19:38:38 +01001022 if (local->sta_sw_scanning)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001023 chan = local->scan_channel;
Johannes Berg8318d782008-01-24 19:38:38 +01001024 else
Johannes Bergb2c258f2007-07-27 15:43:23 +02001025 chan = local->oper_channel;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001026
Johannes Berg8318d782008-01-24 19:38:38 +01001027 local->hw.conf.channel = chan;
1028
1029 if (!local->hw.conf.power_level)
1030 local->hw.conf.power_level = chan->max_power;
1031 else
1032 local->hw.conf.power_level = min(chan->max_power,
1033 local->hw.conf.power_level);
1034
1035 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
Johannes Bergb2c258f2007-07-27 15:43:23 +02001036
1037#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Berg8318d782008-01-24 19:38:38 +01001038 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1039 wiphy_name(local->hw.wiphy), chan->center_freq);
1040#endif
Johannes Bergb2c258f2007-07-27 15:43:23 +02001041
Michael Bueschf7c4dae2007-09-24 18:41:49 +02001042 if (local->open_count)
Johannes Bergb2c258f2007-07-27 15:43:23 +02001043 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1044
1045 return ret;
1046}
1047
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001048/**
Tomas Winkler38668c02008-03-28 16:33:32 -07001049 * ieee80211_handle_ht should be used only after legacy configuration
1050 * has been determined namely band, as ht configuration depends upon
1051 * the hardware's HT abilities for a _specific_ band.
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001052 */
Tomas Winkler38668c02008-03-28 16:33:32 -07001053u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001054 struct ieee80211_ht_info *req_ht_cap,
1055 struct ieee80211_ht_bss_info *req_bss_cap)
1056{
1057 struct ieee80211_conf *conf = &local->hw.conf;
Johannes Berg8318d782008-01-24 19:38:38 +01001058 struct ieee80211_supported_band *sband;
Tomas Winkler38668c02008-03-28 16:33:32 -07001059 struct ieee80211_ht_info ht_conf;
1060 struct ieee80211_ht_bss_info ht_bss_conf;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001061 int i;
Tomas Winkler38668c02008-03-28 16:33:32 -07001062 u32 changed = 0;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001063
Johannes Berg8318d782008-01-24 19:38:38 +01001064 sband = local->hw.wiphy->bands[conf->channel->band];
1065
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001066 /* HT is not supported */
Johannes Berg8318d782008-01-24 19:38:38 +01001067 if (!sband->ht_info.ht_supported) {
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001068 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
Tomas Winkler38668c02008-03-28 16:33:32 -07001069 return 0;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001070 }
1071
Tomas Winkler38668c02008-03-28 16:33:32 -07001072 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1073 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1074
1075 if (enable_ht) {
1076 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1077 changed |= BSS_CHANGED_HT;
1078
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001079 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
Tomas Winkler38668c02008-03-28 16:33:32 -07001080 ht_conf.ht_supported = 1;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001081
Tomas Winkler38668c02008-03-28 16:33:32 -07001082 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1083 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1084 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1085
1086 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
1087 ht_conf.supp_mcs_set[i] =
1088 sband->ht_info.supp_mcs_set[i] &
1089 req_ht_cap->supp_mcs_set[i];
1090
1091 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1092 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1093 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1094
1095 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1096 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1097
1098 /* if bss configuration changed store the new one */
1099 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1100 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1101 changed |= BSS_CHANGED_HT;
1102 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1103 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1104 }
1105 } else {
1106 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1107 changed |= BSS_CHANGED_HT;
1108 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001109 }
1110
Tomas Winkler38668c02008-03-28 16:33:32 -07001111 return changed;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001112}
1113
Johannes Berg471b3ef2007-12-28 14:32:58 +01001114void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1115 u32 changed)
Daniel Draked9430a32007-07-27 15:43:24 +02001116{
Johannes Berg471b3ef2007-12-28 14:32:58 +01001117 struct ieee80211_local *local = sdata->local;
1118
1119 if (!changed)
1120 return;
1121
1122 if (local->ops->bss_info_changed)
1123 local->ops->bss_info_changed(local_to_hw(local),
1124 &sdata->vif,
1125 &sdata->bss_conf,
1126 changed);
Daniel Draked9430a32007-07-27 15:43:24 +02001127}
1128
1129void ieee80211_reset_erp_info(struct net_device *dev)
1130{
1131 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1132
Johannes Berg471b3ef2007-12-28 14:32:58 +01001133 sdata->bss_conf.use_cts_prot = 0;
1134 sdata->bss_conf.use_short_preamble = 0;
1135 ieee80211_bss_info_change_notify(sdata,
1136 BSS_CHANGED_ERP_CTS_PROT |
1137 BSS_CHANGED_ERP_PREAMBLE);
Daniel Draked9430a32007-07-27 15:43:24 +02001138}
1139
Jiri Bencf0706e82007-05-05 11:45:53 -07001140void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1141 struct sk_buff *skb,
1142 struct ieee80211_tx_status *status)
1143{
1144 struct ieee80211_local *local = hw_to_local(hw);
1145 struct ieee80211_tx_status *saved;
1146 int tmp;
1147
1148 skb->dev = local->mdev;
1149 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1150 if (unlikely(!saved)) {
1151 if (net_ratelimit())
1152 printk(KERN_WARNING "%s: Not enough memory, "
1153 "dropping tx status", skb->dev->name);
1154 /* should be dev_kfree_skb_irq, but due to this function being
1155 * named _irqsafe instead of just _irq we can't be sure that
1156 * people won't call it from non-irq contexts */
1157 dev_kfree_skb_any(skb);
1158 return;
1159 }
1160 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1161 /* copy pointer to saved status into skb->cb for use by tasklet */
1162 memcpy(skb->cb, &saved, sizeof(saved));
1163
1164 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1165 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1166 &local->skb_queue : &local->skb_queue_unreliable, skb);
1167 tmp = skb_queue_len(&local->skb_queue) +
1168 skb_queue_len(&local->skb_queue_unreliable);
1169 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1170 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1171 memcpy(&saved, skb->cb, sizeof(saved));
1172 kfree(saved);
1173 dev_kfree_skb_irq(skb);
1174 tmp--;
1175 I802_DEBUG_INC(local->tx_status_drop);
1176 }
1177 tasklet_schedule(&local->tasklet);
1178}
1179EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1180
1181static void ieee80211_tasklet_handler(unsigned long data)
1182{
1183 struct ieee80211_local *local = (struct ieee80211_local *) data;
1184 struct sk_buff *skb;
1185 struct ieee80211_rx_status rx_status;
1186 struct ieee80211_tx_status *tx_status;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001187 struct ieee80211_ra_tid *ra_tid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001188
1189 while ((skb = skb_dequeue(&local->skb_queue)) ||
1190 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1191 switch (skb->pkt_type) {
1192 case IEEE80211_RX_MSG:
1193 /* status is in skb->cb */
1194 memcpy(&rx_status, skb->cb, sizeof(rx_status));
Johannes Berg51fb61e2007-12-19 01:31:27 +01001195 /* Clear skb->pkt_type in order to not confuse kernel
Jiri Bencf0706e82007-05-05 11:45:53 -07001196 * netstack. */
1197 skb->pkt_type = 0;
1198 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1199 break;
1200 case IEEE80211_TX_STATUS_MSG:
1201 /* get pointer to saved status out of skb->cb */
1202 memcpy(&tx_status, skb->cb, sizeof(tx_status));
1203 skb->pkt_type = 0;
1204 ieee80211_tx_status(local_to_hw(local),
1205 skb, tx_status);
1206 kfree(tx_status);
1207 break;
Ron Rindjunskyeadc8d92008-01-28 14:07:17 +02001208 case IEEE80211_DELBA_MSG:
1209 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1210 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1211 ra_tid->ra, ra_tid->tid);
1212 dev_kfree_skb(skb);
1213 break;
1214 case IEEE80211_ADDBA_MSG:
1215 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1216 ieee80211_start_tx_ba_cb(local_to_hw(local),
1217 ra_tid->ra, ra_tid->tid);
1218 dev_kfree_skb(skb);
1219 break ;
Jiri Bencf0706e82007-05-05 11:45:53 -07001220 default: /* should never get here! */
1221 printk(KERN_ERR "%s: Unknown message type (%d)\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001222 wiphy_name(local->hw.wiphy), skb->pkt_type);
Jiri Bencf0706e82007-05-05 11:45:53 -07001223 dev_kfree_skb(skb);
1224 break;
1225 }
1226 }
1227}
1228
Jiri Bencf0706e82007-05-05 11:45:53 -07001229/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1230 * make a prepared TX frame (one that has been given to hw) to look like brand
1231 * new IEEE 802.11 frame that is ready to go through TX processing again.
1232 * Also, tx_packet_data in cb is restored from tx_control. */
1233static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1234 struct ieee80211_key *key,
1235 struct sk_buff *skb,
1236 struct ieee80211_tx_control *control)
1237{
1238 int hdrlen, iv_len, mic_len;
1239 struct ieee80211_tx_packet_data *pkt_data;
1240
1241 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
Johannes Berg32bfd352007-12-19 01:31:26 +01001242 pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex;
Jiri Slabye8bf9642007-08-28 17:01:54 -04001243 pkt_data->flags = 0;
1244 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
1245 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
1246 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
1247 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
1248 if (control->flags & IEEE80211_TXCTL_REQUEUE)
1249 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
Johannes Berg678f5f712007-12-19 01:31:23 +01001250 if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME)
1251 pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME;
Jiri Bencf0706e82007-05-05 11:45:53 -07001252 pkt_data->queue = control->queue;
1253
1254 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1255
1256 if (!key)
1257 goto no_key;
1258
Johannes Berg8f20fc22007-08-28 17:01:54 -04001259 switch (key->conf.alg) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001260 case ALG_WEP:
1261 iv_len = WEP_IV_LEN;
1262 mic_len = WEP_ICV_LEN;
1263 break;
1264 case ALG_TKIP:
1265 iv_len = TKIP_IV_LEN;
1266 mic_len = TKIP_ICV_LEN;
1267 break;
1268 case ALG_CCMP:
1269 iv_len = CCMP_HDR_LEN;
1270 mic_len = CCMP_MIC_LEN;
1271 break;
1272 default:
1273 goto no_key;
1274 }
1275
Johannes Berg8f20fc22007-08-28 17:01:54 -04001276 if (skb->len >= mic_len &&
Johannes Berg11a843b2007-08-28 17:01:55 -04001277 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
Jiri Bencf0706e82007-05-05 11:45:53 -07001278 skb_trim(skb, skb->len - mic_len);
1279 if (skb->len >= iv_len && skb->len > hdrlen) {
1280 memmove(skb->data + iv_len, skb->data, hdrlen);
1281 skb_pull(skb, iv_len);
1282 }
1283
1284no_key:
1285 {
1286 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1287 u16 fc = le16_to_cpu(hdr->frame_control);
1288 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1289 fc &= ~IEEE80211_STYPE_QOS_DATA;
1290 hdr->frame_control = cpu_to_le16(fc);
1291 memmove(skb->data + 2, skb->data, hdrlen - 2);
1292 skb_pull(skb, 2);
1293 }
1294 }
1295}
1296
Johannes Bergd46e1442008-02-20 23:59:33 +01001297static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1298 struct sta_info *sta,
1299 struct sk_buff *skb,
1300 struct ieee80211_tx_status *status)
1301{
1302 sta->tx_filtered_count++;
1303
1304 /*
1305 * Clear the TX filter mask for this STA when sending the next
1306 * packet. If the STA went to power save mode, this will happen
1307 * happen when it wakes up for the next time.
1308 */
1309 sta->flags |= WLAN_STA_CLEAR_PS_FILT;
1310
1311 /*
1312 * This code races in the following way:
1313 *
1314 * (1) STA sends frame indicating it will go to sleep and does so
1315 * (2) hardware/firmware adds STA to filter list, passes frame up
1316 * (3) hardware/firmware processes TX fifo and suppresses a frame
1317 * (4) we get TX status before having processed the frame and
1318 * knowing that the STA has gone to sleep.
1319 *
1320 * This is actually quite unlikely even when both those events are
1321 * processed from interrupts coming in quickly after one another or
1322 * even at the same time because we queue both TX status events and
1323 * RX frames to be processed by a tasklet and process them in the
1324 * same order that they were received or TX status last. Hence, there
1325 * is no race as long as the frame RX is processed before the next TX
1326 * status, which drivers can ensure, see below.
1327 *
1328 * Note that this can only happen if the hardware or firmware can
1329 * actually add STAs to the filter list, if this is done by the
1330 * driver in response to set_tim() (which will only reduce the race
1331 * this whole filtering tries to solve, not completely solve it)
1332 * this situation cannot happen.
1333 *
1334 * To completely solve this race drivers need to make sure that they
1335 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1336 * functions and
1337 * (b) always process RX events before TX status events if ordering
1338 * can be unknown, for example with different interrupt status
1339 * bits.
1340 */
1341 if (sta->flags & WLAN_STA_PS &&
1342 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1343 ieee80211_remove_tx_extra(local, sta->key, skb,
1344 &status->control);
1345 skb_queue_tail(&sta->tx_filtered, skb);
1346 return;
1347 }
1348
1349 if (!(sta->flags & WLAN_STA_PS) &&
1350 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1351 /* Software retry the packet once */
1352 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1353 ieee80211_remove_tx_extra(local, sta->key, skb,
1354 &status->control);
1355 dev_queue_xmit(skb);
1356 return;
1357 }
1358
1359 if (net_ratelimit())
1360 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1361 "queue_len=%d PS=%d @%lu\n",
1362 wiphy_name(local->hw.wiphy),
1363 skb_queue_len(&sta->tx_filtered),
1364 !!(sta->flags & WLAN_STA_PS), jiffies);
1365 dev_kfree_skb(skb);
1366}
1367
Jiri Bencf0706e82007-05-05 11:45:53 -07001368void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1369 struct ieee80211_tx_status *status)
1370{
1371 struct sk_buff *skb2;
1372 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1373 struct ieee80211_local *local = hw_to_local(hw);
1374 u16 frag, type;
Johannes Bergb306f452007-07-10 19:32:08 +02001375 struct ieee80211_tx_status_rtap_hdr *rthdr;
1376 struct ieee80211_sub_if_data *sdata;
Michael Wu3d30d942008-01-31 19:48:27 +01001377 struct net_device *prev_dev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001378
1379 if (!status) {
1380 printk(KERN_ERR
1381 "%s: ieee80211_tx_status called with NULL status\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001382 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001383 dev_kfree_skb(skb);
1384 return;
1385 }
1386
Johannes Bergd0709a62008-02-25 16:27:46 +01001387 rcu_read_lock();
1388
Jiri Bencf0706e82007-05-05 11:45:53 -07001389 if (status->excessive_retries) {
1390 struct sta_info *sta;
1391 sta = sta_info_get(local, hdr->addr1);
1392 if (sta) {
1393 if (sta->flags & WLAN_STA_PS) {
Johannes Bergd46e1442008-02-20 23:59:33 +01001394 /*
1395 * The STA is in power save mode, so assume
Jiri Bencf0706e82007-05-05 11:45:53 -07001396 * that this TX packet failed because of that.
1397 */
1398 status->excessive_retries = 0;
1399 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
Johannes Bergd46e1442008-02-20 23:59:33 +01001400 ieee80211_handle_filtered_frame(local, sta,
1401 skb, status);
Johannes Bergd0709a62008-02-25 16:27:46 +01001402 rcu_read_unlock();
Johannes Bergd46e1442008-02-20 23:59:33 +01001403 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001404 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001405 }
1406 }
1407
1408 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1409 struct sta_info *sta;
1410 sta = sta_info_get(local, hdr->addr1);
1411 if (sta) {
Johannes Bergd46e1442008-02-20 23:59:33 +01001412 ieee80211_handle_filtered_frame(local, sta, skb,
1413 status);
Johannes Bergd0709a62008-02-25 16:27:46 +01001414 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07001415 return;
1416 }
Mattias Nissler1abbe492007-12-20 13:50:07 +01001417 } else
1418 rate_control_tx_status(local->mdev, skb, status);
Jiri Bencf0706e82007-05-05 11:45:53 -07001419
Johannes Bergd0709a62008-02-25 16:27:46 +01001420 rcu_read_unlock();
1421
Jiri Bencf0706e82007-05-05 11:45:53 -07001422 ieee80211_led_tx(local, 0);
1423
1424 /* SNMP counters
1425 * Fragments are passed to low-level drivers as separate skbs, so these
1426 * are actually fragments, not frames. Update frame counters only for
1427 * the first fragment of the frame. */
1428
1429 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1430 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1431
1432 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1433 if (frag == 0) {
1434 local->dot11TransmittedFrameCount++;
1435 if (is_multicast_ether_addr(hdr->addr1))
1436 local->dot11MulticastTransmittedFrameCount++;
1437 if (status->retry_count > 0)
1438 local->dot11RetryCount++;
1439 if (status->retry_count > 1)
1440 local->dot11MultipleRetryCount++;
1441 }
1442
1443 /* This counter shall be incremented for an acknowledged MPDU
1444 * with an individual address in the address 1 field or an MPDU
1445 * with a multicast address in the address 1 field of type Data
1446 * or Management. */
1447 if (!is_multicast_ether_addr(hdr->addr1) ||
1448 type == IEEE80211_FTYPE_DATA ||
1449 type == IEEE80211_FTYPE_MGMT)
1450 local->dot11TransmittedFragmentCount++;
1451 } else {
1452 if (frag == 0)
1453 local->dot11FailedCount++;
1454 }
1455
Johannes Bergb306f452007-07-10 19:32:08 +02001456 /* this was a transmitted frame, but now we want to reuse it */
1457 skb_orphan(skb);
1458
Michael Wu3d30d942008-01-31 19:48:27 +01001459 /*
1460 * This is a bit racy but we can avoid a lot of work
1461 * with this test...
1462 */
1463 if (!local->monitors && !local->cooked_mntrs) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001464 dev_kfree_skb(skb);
1465 return;
1466 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001467
Johannes Bergb306f452007-07-10 19:32:08 +02001468 /* send frame to monitor interfaces now */
1469
1470 if (skb_headroom(skb) < sizeof(*rthdr)) {
1471 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1472 dev_kfree_skb(skb);
1473 return;
1474 }
1475
1476 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1477 skb_push(skb, sizeof(*rthdr));
1478
1479 memset(rthdr, 0, sizeof(*rthdr));
1480 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1481 rthdr->hdr.it_present =
1482 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1483 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1484
1485 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1486 !is_multicast_ether_addr(hdr->addr1))
1487 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1488
1489 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1490 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1491 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1492 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1493 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1494
1495 rthdr->data_retries = status->retry_count;
1496
Michael Wu3d30d942008-01-31 19:48:27 +01001497 /* XXX: is this sufficient for BPF? */
1498 skb_set_mac_header(skb, 0);
1499 skb->ip_summed = CHECKSUM_UNNECESSARY;
1500 skb->pkt_type = PACKET_OTHERHOST;
1501 skb->protocol = htons(ETH_P_802_2);
1502 memset(skb->cb, 0, sizeof(skb->cb));
Johannes Bergb306f452007-07-10 19:32:08 +02001503
Michael Wu3d30d942008-01-31 19:48:27 +01001504 rcu_read_lock();
1505 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +01001506 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
Johannes Bergb306f452007-07-10 19:32:08 +02001507 if (!netif_running(sdata->dev))
1508 continue;
Michael Wu3d30d942008-01-31 19:48:27 +01001509
1510 if (prev_dev) {
Johannes Berg79010422007-09-18 17:29:21 -04001511 skb2 = skb_clone(skb, GFP_ATOMIC);
Michael Wu3d30d942008-01-31 19:48:27 +01001512 if (skb2) {
1513 skb2->dev = prev_dev;
1514 netif_rx(skb2);
1515 }
1516 }
1517
1518 prev_dev = sdata->dev;
Johannes Bergb306f452007-07-10 19:32:08 +02001519 }
1520 }
Michael Wu3d30d942008-01-31 19:48:27 +01001521 if (prev_dev) {
1522 skb->dev = prev_dev;
1523 netif_rx(skb);
1524 skb = NULL;
1525 }
Johannes Berg79010422007-09-18 17:29:21 -04001526 rcu_read_unlock();
Michael Wu3d30d942008-01-31 19:48:27 +01001527 dev_kfree_skb(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001528}
1529EXPORT_SYMBOL(ieee80211_tx_status);
1530
Jiri Bencf0706e82007-05-05 11:45:53 -07001531struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1532 const struct ieee80211_ops *ops)
1533{
Jiri Bencf0706e82007-05-05 11:45:53 -07001534 struct ieee80211_local *local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001535 int priv_size;
1536 struct wiphy *wiphy;
1537
1538 /* Ensure 32-byte alignment of our private data and hw private data.
1539 * We use the wiphy priv data for both our ieee80211_local and for
1540 * the driver's private data
1541 *
1542 * In memory it'll be like this:
1543 *
1544 * +-------------------------+
1545 * | struct wiphy |
1546 * +-------------------------+
1547 * | struct ieee80211_local |
1548 * +-------------------------+
1549 * | driver's private data |
1550 * +-------------------------+
1551 *
1552 */
1553 priv_size = ((sizeof(struct ieee80211_local) +
1554 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1555 priv_data_len;
1556
1557 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1558
1559 if (!wiphy)
1560 return NULL;
1561
1562 wiphy->privid = mac80211_wiphy_privid;
1563
1564 local = wiphy_priv(wiphy);
1565 local->hw.wiphy = wiphy;
1566
1567 local->hw.priv = (char *)local +
1568 ((sizeof(struct ieee80211_local) +
1569 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1570
Johannes Berg4480f15c2007-07-10 19:32:10 +02001571 BUG_ON(!ops->tx);
Johannes Berg4150c572007-09-17 01:29:23 -04001572 BUG_ON(!ops->start);
1573 BUG_ON(!ops->stop);
Johannes Berg4480f15c2007-07-10 19:32:10 +02001574 BUG_ON(!ops->config);
1575 BUG_ON(!ops->add_interface);
Johannes Berg4150c572007-09-17 01:29:23 -04001576 BUG_ON(!ops->remove_interface);
1577 BUG_ON(!ops->configure_filter);
Jiri Bencf0706e82007-05-05 11:45:53 -07001578 local->ops = ops;
1579
Jiri Bencf0706e82007-05-05 11:45:53 -07001580 local->hw.queues = 1; /* default */
1581
Jiri Bencf0706e82007-05-05 11:45:53 -07001582 local->bridge_packets = 1;
1583
1584 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1585 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1586 local->short_retry_limit = 7;
1587 local->long_retry_limit = 4;
1588 local->hw.conf.radio_enabled = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001589
Johannes Berg79010422007-09-18 17:29:21 -04001590 INIT_LIST_HEAD(&local->interfaces);
Jiri Bencf0706e82007-05-05 11:45:53 -07001591
1592 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
Jiri Bencf0706e82007-05-05 11:45:53 -07001593
1594 sta_info_init(local);
1595
Jiri Bencf0706e82007-05-05 11:45:53 -07001596 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1597 (unsigned long)local);
1598 tasklet_disable(&local->tx_pending_tasklet);
1599
1600 tasklet_init(&local->tasklet,
1601 ieee80211_tasklet_handler,
1602 (unsigned long) local);
1603 tasklet_disable(&local->tasklet);
1604
1605 skb_queue_head_init(&local->skb_queue);
1606 skb_queue_head_init(&local->skb_queue_unreliable);
1607
1608 return local_to_hw(local);
1609}
1610EXPORT_SYMBOL(ieee80211_alloc_hw);
1611
1612int ieee80211_register_hw(struct ieee80211_hw *hw)
1613{
1614 struct ieee80211_local *local = hw_to_local(hw);
1615 const char *name;
1616 int result;
Johannes Berg8318d782008-01-24 19:38:38 +01001617 enum ieee80211_band band;
Johannes Berg96d51052008-02-08 09:48:13 +01001618 struct net_device *mdev;
1619 struct ieee80211_sub_if_data *sdata;
Johannes Berg8318d782008-01-24 19:38:38 +01001620
1621 /*
1622 * generic code guarantees at least one band,
1623 * set this very early because much code assumes
1624 * that hw.conf.channel is assigned
1625 */
1626 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1627 struct ieee80211_supported_band *sband;
1628
1629 sband = local->hw.wiphy->bands[band];
1630 if (sband) {
1631 /* init channel we're on */
1632 local->hw.conf.channel =
1633 local->oper_channel =
1634 local->scan_channel = &sband->channels[0];
1635 break;
1636 }
1637 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001638
1639 result = wiphy_register(local->hw.wiphy);
1640 if (result < 0)
1641 return result;
1642
Johannes Berg96d51052008-02-08 09:48:13 +01001643 /* for now, mdev needs sub_if_data :/ */
1644 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1645 "wmaster%d", ether_setup);
1646 if (!mdev)
1647 goto fail_mdev_alloc;
1648
1649 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1650 mdev->ieee80211_ptr = &sdata->wdev;
1651 sdata->wdev.wiphy = local->hw.wiphy;
1652
1653 local->mdev = mdev;
1654
1655 ieee80211_rx_bss_list_init(mdev);
1656
1657 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1658 mdev->open = ieee80211_master_open;
1659 mdev->stop = ieee80211_master_stop;
1660 mdev->type = ARPHRD_IEEE80211;
1661 mdev->header_ops = &ieee80211_header_ops;
1662 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1663
1664 sdata->vif.type = IEEE80211_IF_TYPE_AP;
1665 sdata->dev = mdev;
1666 sdata->local = local;
1667 sdata->u.ap.force_unicast_rateidx = -1;
1668 sdata->u.ap.max_ratectrl_rateidx = -1;
1669 ieee80211_if_sdata_init(sdata);
1670
1671 /* no RCU needed since we're still during init phase */
1672 list_add_tail(&sdata->list, &local->interfaces);
1673
Jiri Bencf0706e82007-05-05 11:45:53 -07001674 name = wiphy_dev(local->hw.wiphy)->driver->name;
1675 local->hw.workqueue = create_singlethread_workqueue(name);
1676 if (!local->hw.workqueue) {
1677 result = -ENOMEM;
1678 goto fail_workqueue;
1679 }
1680
Johannes Bergb306f452007-07-10 19:32:08 +02001681 /*
1682 * The hardware needs headroom for sending the frame,
1683 * and we need some headroom for passing the frame to monitor
1684 * interfaces, but never both at the same time.
1685 */
Jiri Benc33ccad32007-07-18 17:10:44 +02001686 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1687 sizeof(struct ieee80211_tx_status_rtap_hdr));
Johannes Bergb306f452007-07-10 19:32:08 +02001688
Jiri Bence9f207f2007-05-05 11:46:38 -07001689 debugfs_hw_add(local);
1690
Jiri Bencf0706e82007-05-05 11:45:53 -07001691 local->hw.conf.beacon_int = 1000;
1692
1693 local->wstats_flags |= local->hw.max_rssi ?
1694 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1695 local->wstats_flags |= local->hw.max_signal ?
1696 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1697 local->wstats_flags |= local->hw.max_noise ?
1698 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1699 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1700 local->wstats_flags |= IW_QUAL_DBM;
1701
1702 result = sta_info_start(local);
1703 if (result < 0)
1704 goto fail_sta_info;
1705
1706 rtnl_lock();
1707 result = dev_alloc_name(local->mdev, local->mdev->name);
1708 if (result < 0)
1709 goto fail_dev;
1710
1711 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1712 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1713
1714 result = register_netdevice(local->mdev);
1715 if (result < 0)
1716 goto fail_dev;
1717
Jiri Bence9f207f2007-05-05 11:46:38 -07001718 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
Johannes Berg5b2812e2007-09-26 14:27:23 +02001719 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
Jiri Bence9f207f2007-05-05 11:46:38 -07001720
Johannes Berg830f9032007-10-28 14:51:05 +01001721 result = ieee80211_init_rate_ctrl_alg(local,
1722 hw->rate_control_algorithm);
Jiri Bencf0706e82007-05-05 11:45:53 -07001723 if (result < 0) {
1724 printk(KERN_DEBUG "%s: Failed to initialize rate control "
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001725 "algorithm\n", wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001726 goto fail_rate;
1727 }
1728
1729 result = ieee80211_wep_init(local);
1730
1731 if (result < 0) {
1732 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001733 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001734 goto fail_wep;
1735 }
1736
1737 ieee80211_install_qdisc(local->mdev);
1738
1739 /* add one default STA interface */
1740 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
Luis Carlos Coboee385852008-02-23 15:17:11 +01001741 IEEE80211_IF_TYPE_STA, NULL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001742 if (result)
1743 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001744 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001745
1746 local->reg_state = IEEE80211_DEV_REGISTERED;
1747 rtnl_unlock();
1748
1749 ieee80211_led_init(local);
1750
1751 return 0;
1752
1753fail_wep:
1754 rate_control_deinitialize(local);
1755fail_rate:
Jiri Bence9f207f2007-05-05 11:46:38 -07001756 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
Jiri Bencf0706e82007-05-05 11:45:53 -07001757 unregister_netdevice(local->mdev);
1758fail_dev:
1759 rtnl_unlock();
1760 sta_info_stop(local);
1761fail_sta_info:
Jiri Bence9f207f2007-05-05 11:46:38 -07001762 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001763 destroy_workqueue(local->hw.workqueue);
1764fail_workqueue:
Johannes Berg96d51052008-02-08 09:48:13 +01001765 ieee80211_if_free(local->mdev);
1766 local->mdev = NULL;
1767fail_mdev_alloc:
Jiri Bencf0706e82007-05-05 11:45:53 -07001768 wiphy_unregister(local->hw.wiphy);
1769 return result;
1770}
1771EXPORT_SYMBOL(ieee80211_register_hw);
1772
Jiri Bencf0706e82007-05-05 11:45:53 -07001773void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1774{
1775 struct ieee80211_local *local = hw_to_local(hw);
1776 struct ieee80211_sub_if_data *sdata, *tmp;
Jiri Bencf0706e82007-05-05 11:45:53 -07001777
1778 tasklet_kill(&local->tx_pending_tasklet);
1779 tasklet_kill(&local->tasklet);
1780
1781 rtnl_lock();
1782
1783 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1784
1785 local->reg_state = IEEE80211_DEV_UNREGISTERED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001786
Johannes Berg79010422007-09-18 17:29:21 -04001787 /*
1788 * At this point, interface list manipulations are fine
1789 * because the driver cannot be handing us frames any
1790 * more and the tasklet is killed.
1791 */
Johannes Berg5b2812e2007-09-26 14:27:23 +02001792
1793 /*
1794 * First, we remove all non-master interfaces. Do this because they
1795 * may have bss pointer dependency on the master, and when we free
1796 * the master these would be freed as well, breaking our list
1797 * iteration completely.
1798 */
1799 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1800 if (sdata->dev == local->mdev)
1801 continue;
1802 list_del(&sdata->list);
Jiri Bencf0706e82007-05-05 11:45:53 -07001803 __ieee80211_if_del(local, sdata);
Johannes Berg5b2812e2007-09-26 14:27:23 +02001804 }
1805
1806 /* then, finally, remove the master interface */
1807 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
Jiri Bencf0706e82007-05-05 11:45:53 -07001808
1809 rtnl_unlock();
1810
Jiri Bencf0706e82007-05-05 11:45:53 -07001811 ieee80211_rx_bss_list_deinit(local->mdev);
1812 ieee80211_clear_tx_pending(local);
1813 sta_info_stop(local);
1814 rate_control_deinitialize(local);
Jiri Bence9f207f2007-05-05 11:46:38 -07001815 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001816
Jiri Bencf0706e82007-05-05 11:45:53 -07001817 if (skb_queue_len(&local->skb_queue)
1818 || skb_queue_len(&local->skb_queue_unreliable))
1819 printk(KERN_WARNING "%s: skb_queue not empty\n",
Johannes Bergdd1cd4c2007-09-18 17:29:20 -04001820 wiphy_name(local->hw.wiphy));
Jiri Bencf0706e82007-05-05 11:45:53 -07001821 skb_queue_purge(&local->skb_queue);
1822 skb_queue_purge(&local->skb_queue_unreliable);
1823
1824 destroy_workqueue(local->hw.workqueue);
1825 wiphy_unregister(local->hw.wiphy);
1826 ieee80211_wep_free(local);
1827 ieee80211_led_exit(local);
Johannes Berg96d51052008-02-08 09:48:13 +01001828 ieee80211_if_free(local->mdev);
1829 local->mdev = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001830}
1831EXPORT_SYMBOL(ieee80211_unregister_hw);
1832
1833void ieee80211_free_hw(struct ieee80211_hw *hw)
1834{
1835 struct ieee80211_local *local = hw_to_local(hw);
1836
Jiri Bencf0706e82007-05-05 11:45:53 -07001837 wiphy_free(local->hw.wiphy);
1838}
1839EXPORT_SYMBOL(ieee80211_free_hw);
1840
Jiri Bencf0706e82007-05-05 11:45:53 -07001841static int __init ieee80211_init(void)
1842{
1843 struct sk_buff *skb;
1844 int ret;
1845
1846 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1847
Johannes Berg4b475892008-01-02 15:17:03 +01001848 ret = rc80211_pid_init();
Mattias Nisslerad018372007-12-19 01:25:57 +01001849 if (ret)
Adrian Bunkd9357132008-03-04 15:26:15 -08001850 goto out;
Johannes Bergac71c692007-10-28 14:17:44 +01001851
Jiri Bencf0706e82007-05-05 11:45:53 -07001852 ret = ieee80211_wme_register();
1853 if (ret) {
1854 printk(KERN_DEBUG "ieee80211_init: failed to "
1855 "initialize WME (err=%d)\n", ret);
Johannes Berg3eadf5f2008-01-31 19:33:53 +01001856 goto out_cleanup_pid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001857 }
1858
Jiri Bence9f207f2007-05-05 11:46:38 -07001859 ieee80211_debugfs_netdev_init();
1860
Jiri Bencf0706e82007-05-05 11:45:53 -07001861 return 0;
Mattias Nisslerad018372007-12-19 01:25:57 +01001862
Johannes Berg3eadf5f2008-01-31 19:33:53 +01001863 out_cleanup_pid:
Johannes Berg4b475892008-01-02 15:17:03 +01001864 rc80211_pid_exit();
Johannes Berg3eadf5f2008-01-31 19:33:53 +01001865 out:
Mattias Nisslerad018372007-12-19 01:25:57 +01001866 return ret;
Jiri Bencf0706e82007-05-05 11:45:53 -07001867}
1868
Jiri Bencf0706e82007-05-05 11:45:53 -07001869static void __exit ieee80211_exit(void)
1870{
Johannes Berg4b475892008-01-02 15:17:03 +01001871 rc80211_pid_exit();
Johannes Bergac71c692007-10-28 14:17:44 +01001872
Luis Carlos Cobof7a92142008-02-23 15:17:18 +01001873 if (mesh_allocated)
1874 ieee80211s_stop();
Johannes Berg902acc72008-02-23 15:17:19 +01001875
Jiri Bencf0706e82007-05-05 11:45:53 -07001876 ieee80211_wme_unregister();
Jiri Bence9f207f2007-05-05 11:46:38 -07001877 ieee80211_debugfs_netdev_exit();
Jiri Bencf0706e82007-05-05 11:45:53 -07001878}
1879
1880
Johannes Bergca9938f2007-09-11 12:50:32 +02001881subsys_initcall(ieee80211_init);
Jiri Bencf0706e82007-05-05 11:45:53 -07001882module_exit(ieee80211_exit);
1883
1884MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1885MODULE_LICENSE("GPL");