Commit | Line | Data |
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f0706e82 | 1 | /* |
0d143fe1 JB |
2 | * Interface handling (except master interface) |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Instant802 Networks, Inc. |
5 | * Copyright 2005-2006, Devicescape Software, Inc. | |
6 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> | |
75636525 | 7 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/if_arp.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/rtnetlink.h> | |
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "sta_info.h" | |
e9f207f0 | 20 | #include "debugfs_netdev.h" |
ee385855 | 21 | #include "mesh.h" |
0d143fe1 JB |
22 | #include "led.h" |
23 | ||
24 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) | |
25 | { | |
26 | int meshhdrlen; | |
27 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
28 | ||
29 | meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0; | |
30 | ||
31 | /* FIX: what would be proper limits for MTU? | |
32 | * This interface uses 802.3 frames. */ | |
33 | if (new_mtu < 256 || | |
34 | new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) { | |
35 | return -EINVAL; | |
36 | } | |
37 | ||
38 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
39 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
40 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
41 | dev->mtu = new_mtu; | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static inline int identical_mac_addr_allowed(int type1, int type2) | |
46 | { | |
47 | return type1 == NL80211_IFTYPE_MONITOR || | |
48 | type2 == NL80211_IFTYPE_MONITOR || | |
49 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) || | |
50 | (type1 == NL80211_IFTYPE_WDS && | |
51 | (type2 == NL80211_IFTYPE_WDS || | |
52 | type2 == NL80211_IFTYPE_AP)) || | |
53 | (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) || | |
54 | (type1 == NL80211_IFTYPE_AP_VLAN && | |
55 | (type2 == NL80211_IFTYPE_AP || | |
56 | type2 == NL80211_IFTYPE_AP_VLAN)); | |
57 | } | |
58 | ||
59 | static int ieee80211_open(struct net_device *dev) | |
60 | { | |
b4a4bf5d JB |
61 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
62 | struct ieee80211_sub_if_data *nsdata; | |
63 | struct ieee80211_local *local = sdata->local; | |
0d143fe1 JB |
64 | struct sta_info *sta; |
65 | struct ieee80211_if_init_conf conf; | |
66 | u32 changed = 0; | |
67 | int res; | |
e8975581 | 68 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
69 | u8 null_addr[ETH_ALEN] = {0}; |
70 | ||
0d143fe1 JB |
71 | /* fail early if user set an invalid address */ |
72 | if (compare_ether_addr(dev->dev_addr, null_addr) && | |
73 | !is_valid_ether_addr(dev->dev_addr)) | |
74 | return -EADDRNOTAVAIL; | |
75 | ||
76 | /* we hold the RTNL here so can safely walk the list */ | |
77 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
78 | struct net_device *ndev = nsdata->dev; | |
79 | ||
80 | if (ndev != dev && netif_running(ndev)) { | |
81 | /* | |
82 | * Allow only a single IBSS interface to be up at any | |
83 | * time. This is restricted because beacon distribution | |
84 | * cannot work properly if both are in the same IBSS. | |
85 | * | |
86 | * To remove this restriction we'd have to disallow them | |
87 | * from setting the same SSID on different IBSS interfaces | |
88 | * belonging to the same hardware. Then, however, we're | |
89 | * faced with having to adopt two different TSF timers... | |
90 | */ | |
91 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && | |
92 | nsdata->vif.type == NL80211_IFTYPE_ADHOC) | |
93 | return -EBUSY; | |
94 | ||
95 | /* | |
96 | * The remaining checks are only performed for interfaces | |
97 | * with the same MAC address. | |
98 | */ | |
99 | if (compare_ether_addr(dev->dev_addr, ndev->dev_addr)) | |
100 | continue; | |
101 | ||
102 | /* | |
103 | * check whether it may have the same address | |
104 | */ | |
105 | if (!identical_mac_addr_allowed(sdata->vif.type, | |
106 | nsdata->vif.type)) | |
107 | return -ENOTUNIQ; | |
108 | ||
109 | /* | |
110 | * can only add VLANs to enabled APs | |
111 | */ | |
112 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
113 | nsdata->vif.type == NL80211_IFTYPE_AP) | |
114 | sdata->bss = &nsdata->u.ap; | |
115 | } | |
116 | } | |
117 | ||
118 | switch (sdata->vif.type) { | |
119 | case NL80211_IFTYPE_WDS: | |
120 | if (!is_valid_ether_addr(sdata->u.wds.remote_addr)) | |
121 | return -ENOLINK; | |
122 | break; | |
123 | case NL80211_IFTYPE_AP_VLAN: | |
124 | if (!sdata->bss) | |
125 | return -ENOLINK; | |
126 | list_add(&sdata->u.vlan.list, &sdata->bss->vlans); | |
127 | break; | |
128 | case NL80211_IFTYPE_AP: | |
129 | sdata->bss = &sdata->u.ap; | |
130 | break; | |
131 | case NL80211_IFTYPE_MESH_POINT: | |
132 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
133 | break; | |
134 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
135 | atomic_inc(&local->iff_allmultis); | |
136 | break; | |
137 | case NL80211_IFTYPE_STATION: | |
138 | case NL80211_IFTYPE_MONITOR: | |
139 | case NL80211_IFTYPE_ADHOC: | |
140 | /* no special treatment */ | |
141 | break; | |
142 | case NL80211_IFTYPE_UNSPECIFIED: | |
143 | case __NL80211_IFTYPE_AFTER_LAST: | |
144 | /* cannot happen */ | |
145 | WARN_ON(1); | |
146 | break; | |
147 | } | |
148 | ||
149 | if (local->open_count == 0) { | |
150 | res = 0; | |
151 | if (local->ops->start) | |
152 | res = local->ops->start(local_to_hw(local)); | |
153 | if (res) | |
154 | goto err_del_bss; | |
e8975581 JB |
155 | /* we're brought up, everything changes */ |
156 | hw_reconf_flags = ~0; | |
0d143fe1 JB |
157 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
158 | } | |
159 | ||
160 | /* | |
161 | * Check all interfaces and copy the hopefully now-present | |
162 | * MAC address to those that have the special null one. | |
163 | */ | |
164 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
165 | struct net_device *ndev = nsdata->dev; | |
166 | ||
167 | /* | |
168 | * No need to check netif_running since we do not allow | |
169 | * it to start up with this invalid address. | |
170 | */ | |
171 | if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) | |
172 | memcpy(ndev->dev_addr, | |
173 | local->hw.wiphy->perm_addr, | |
174 | ETH_ALEN); | |
175 | } | |
176 | ||
177 | if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0) | |
178 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, | |
179 | ETH_ALEN); | |
180 | ||
181 | /* | |
182 | * Validate the MAC address for this device. | |
183 | */ | |
184 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
185 | if (!local->open_count && local->ops->stop) | |
186 | local->ops->stop(local_to_hw(local)); | |
187 | return -EADDRNOTAVAIL; | |
188 | } | |
189 | ||
190 | switch (sdata->vif.type) { | |
191 | case NL80211_IFTYPE_AP_VLAN: | |
192 | /* no need to tell driver */ | |
193 | break; | |
194 | case NL80211_IFTYPE_MONITOR: | |
195 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
196 | local->cooked_mntrs++; | |
197 | break; | |
198 | } | |
199 | ||
200 | /* must be before the call to ieee80211_configure_filter */ | |
201 | local->monitors++; | |
e8975581 | 202 | if (local->monitors == 1) { |
0d143fe1 | 203 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
e8975581 JB |
204 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
205 | } | |
0d143fe1 JB |
206 | |
207 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
208 | local->fif_fcsfail++; | |
209 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
210 | local->fif_plcpfail++; | |
211 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
212 | local->fif_control++; | |
213 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
214 | local->fif_other_bss++; | |
215 | ||
216 | netif_addr_lock_bh(local->mdev); | |
217 | ieee80211_configure_filter(local); | |
218 | netif_addr_unlock_bh(local->mdev); | |
219 | break; | |
220 | case NL80211_IFTYPE_STATION: | |
221 | case NL80211_IFTYPE_ADHOC: | |
222 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
223 | /* fall through */ | |
224 | default: | |
225 | conf.vif = &sdata->vif; | |
226 | conf.type = sdata->vif.type; | |
227 | conf.mac_addr = dev->dev_addr; | |
228 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
229 | if (res) | |
230 | goto err_stop; | |
231 | ||
a3c9aa51 AY |
232 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
233 | local->fif_other_bss++; | |
234 | netif_addr_lock_bh(local->mdev); | |
235 | ieee80211_configure_filter(local); | |
236 | netif_addr_unlock_bh(local->mdev); | |
237 | ||
0d143fe1 | 238 | ieee80211_start_mesh(sdata); |
a3c9aa51 | 239 | } |
0d143fe1 JB |
240 | changed |= ieee80211_reset_erp_info(sdata); |
241 | ieee80211_bss_info_change_notify(sdata, changed); | |
242 | ieee80211_enable_keys(sdata); | |
243 | ||
244 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
245 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) | |
246 | netif_carrier_off(dev); | |
247 | else | |
248 | netif_carrier_on(dev); | |
249 | } | |
250 | ||
251 | if (sdata->vif.type == NL80211_IFTYPE_WDS) { | |
252 | /* Create STA entry for the WDS peer */ | |
253 | sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr, | |
254 | GFP_KERNEL); | |
255 | if (!sta) { | |
256 | res = -ENOMEM; | |
257 | goto err_del_interface; | |
258 | } | |
259 | ||
260 | /* no locking required since STA is not live yet */ | |
261 | sta->flags |= WLAN_STA_AUTHORIZED; | |
262 | ||
263 | res = sta_info_insert(sta); | |
264 | if (res) { | |
265 | /* STA has been freed */ | |
266 | goto err_del_interface; | |
267 | } | |
268 | } | |
269 | ||
270 | if (local->open_count == 0) { | |
271 | res = dev_open(local->mdev); | |
272 | WARN_ON(res); | |
273 | if (res) | |
274 | goto err_del_interface; | |
275 | tasklet_enable(&local->tx_pending_tasklet); | |
276 | tasklet_enable(&local->tasklet); | |
277 | } | |
278 | ||
279 | /* | |
280 | * set_multicast_list will be invoked by the networking core | |
281 | * which will check whether any increments here were done in | |
282 | * error and sync them down to the hardware as filter flags. | |
283 | */ | |
284 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
285 | atomic_inc(&local->iff_allmultis); | |
286 | ||
287 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
288 | atomic_inc(&local->iff_promiscs); | |
289 | ||
290 | local->open_count++; | |
e8975581 JB |
291 | if (hw_reconf_flags) { |
292 | ieee80211_hw_config(local, hw_reconf_flags); | |
0d143fe1 JB |
293 | /* |
294 | * set default queue parameters so drivers don't | |
295 | * need to initialise the hardware if the hardware | |
296 | * doesn't start up with sane defaults | |
297 | */ | |
298 | ieee80211_set_wmm_default(sdata); | |
299 | } | |
300 | ||
301 | /* | |
302 | * ieee80211_sta_work is disabled while network interface | |
303 | * is down. Therefore, some configuration changes may not | |
304 | * yet be effective. Trigger execution of ieee80211_sta_work | |
305 | * to fix this. | |
306 | */ | |
307 | if (sdata->vif.type == NL80211_IFTYPE_STATION || | |
308 | sdata->vif.type == NL80211_IFTYPE_ADHOC) { | |
309 | struct ieee80211_if_sta *ifsta = &sdata->u.sta; | |
310 | queue_work(local->hw.workqueue, &ifsta->work); | |
311 | } | |
f0706e82 | 312 | |
0d143fe1 JB |
313 | netif_tx_start_all_queues(dev); |
314 | ||
315 | return 0; | |
316 | err_del_interface: | |
317 | local->ops->remove_interface(local_to_hw(local), &conf); | |
318 | err_stop: | |
319 | if (!local->open_count && local->ops->stop) | |
320 | local->ops->stop(local_to_hw(local)); | |
321 | err_del_bss: | |
322 | sdata->bss = NULL; | |
323 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
324 | list_del(&sdata->u.vlan.list); | |
325 | return res; | |
326 | } | |
327 | ||
328 | static int ieee80211_stop(struct net_device *dev) | |
329 | { | |
330 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
331 | struct ieee80211_local *local = sdata->local; | |
332 | struct ieee80211_if_init_conf conf; | |
333 | struct sta_info *sta; | |
e8975581 | 334 | u32 hw_reconf_flags = 0; |
0d143fe1 JB |
335 | |
336 | /* | |
337 | * Stop TX on this interface first. | |
338 | */ | |
339 | netif_tx_stop_all_queues(dev); | |
340 | ||
341 | /* | |
342 | * Now delete all active aggregation sessions. | |
343 | */ | |
344 | rcu_read_lock(); | |
345 | ||
346 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
347 | if (sta->sdata == sdata) | |
17741cdc JB |
348 | ieee80211_sta_tear_down_BA_sessions(sdata, |
349 | sta->sta.addr); | |
0d143fe1 JB |
350 | } |
351 | ||
352 | rcu_read_unlock(); | |
353 | ||
354 | /* | |
355 | * Remove all stations associated with this interface. | |
356 | * | |
357 | * This must be done before calling ops->remove_interface() | |
358 | * because otherwise we can later invoke ops->sta_notify() | |
359 | * whenever the STAs are removed, and that invalidates driver | |
360 | * assumptions about always getting a vif pointer that is valid | |
361 | * (because if we remove a STA after ops->remove_interface() | |
362 | * the driver will have removed the vif info already!) | |
363 | * | |
364 | * We could relax this and only unlink the stations from the | |
365 | * hash table and list but keep them on a per-sdata list that | |
366 | * will be inserted back again when the interface is brought | |
367 | * up again, but I don't currently see a use case for that, | |
368 | * except with WDS which gets a STA entry created when it is | |
369 | * brought up. | |
370 | */ | |
371 | sta_info_flush(local, sdata); | |
372 | ||
373 | /* | |
374 | * Don't count this interface for promisc/allmulti while it | |
375 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
376 | * on the master interface which will sync these down to the | |
377 | * hardware as filter flags. | |
378 | */ | |
379 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
380 | atomic_dec(&local->iff_allmultis); | |
381 | ||
382 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
383 | atomic_dec(&local->iff_promiscs); | |
384 | ||
385 | dev_mc_unsync(local->mdev, dev); | |
7cbf0ba5 VN |
386 | del_timer_sync(&local->dynamic_ps_timer); |
387 | cancel_work_sync(&local->dynamic_ps_enable_work); | |
0d143fe1 JB |
388 | |
389 | /* APs need special treatment */ | |
390 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
391 | struct ieee80211_sub_if_data *vlan, *tmp; | |
392 | struct beacon_data *old_beacon = sdata->u.ap.beacon; | |
393 | ||
394 | /* remove beacon */ | |
395 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
396 | synchronize_rcu(); | |
397 | kfree(old_beacon); | |
398 | ||
399 | /* down all dependent devices, that is VLANs */ | |
400 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, | |
401 | u.vlan.list) | |
402 | dev_close(vlan->dev); | |
403 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
404 | } | |
405 | ||
406 | local->open_count--; | |
407 | ||
408 | switch (sdata->vif.type) { | |
409 | case NL80211_IFTYPE_AP_VLAN: | |
410 | list_del(&sdata->u.vlan.list); | |
411 | /* no need to tell driver */ | |
412 | break; | |
413 | case NL80211_IFTYPE_MONITOR: | |
414 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) { | |
415 | local->cooked_mntrs--; | |
416 | break; | |
417 | } | |
418 | ||
419 | local->monitors--; | |
e8975581 | 420 | if (local->monitors == 0) { |
0d143fe1 | 421 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
e8975581 JB |
422 | hw_reconf_flags |= IEEE80211_CONF_CHANGE_RADIOTAP; |
423 | } | |
0d143fe1 JB |
424 | |
425 | if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL) | |
426 | local->fif_fcsfail--; | |
427 | if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL) | |
428 | local->fif_plcpfail--; | |
429 | if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) | |
430 | local->fif_control--; | |
431 | if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS) | |
432 | local->fif_other_bss--; | |
433 | ||
434 | netif_addr_lock_bh(local->mdev); | |
435 | ieee80211_configure_filter(local); | |
436 | netif_addr_unlock_bh(local->mdev); | |
437 | break; | |
438 | case NL80211_IFTYPE_STATION: | |
439 | case NL80211_IFTYPE_ADHOC: | |
e327b847 JL |
440 | /* Announce that we are leaving the network. */ |
441 | if (sdata->u.sta.state != IEEE80211_STA_MLME_DISABLED) | |
442 | ieee80211_sta_deauthenticate(sdata, | |
443 | WLAN_REASON_DEAUTH_LEAVING); | |
444 | ||
0d143fe1 | 445 | memset(sdata->u.sta.bssid, 0, ETH_ALEN); |
c481ec97 | 446 | del_timer_sync(&sdata->u.sta.chswitch_timer); |
0d143fe1 JB |
447 | del_timer_sync(&sdata->u.sta.timer); |
448 | /* | |
449 | * If the timer fired while we waited for it, it will have | |
450 | * requeued the work. Now the work will be running again | |
451 | * but will not rearm the timer again because it checks | |
452 | * whether the interface is running, which, at this point, | |
453 | * it no longer is. | |
454 | */ | |
455 | cancel_work_sync(&sdata->u.sta.work); | |
c481ec97 | 456 | cancel_work_sync(&sdata->u.sta.chswitch_work); |
0d143fe1 JB |
457 | /* |
458 | * When we get here, the interface is marked down. | |
459 | * Call synchronize_rcu() to wait for the RX path | |
460 | * should it be using the interface and enqueuing | |
461 | * frames at this very time on another CPU. | |
462 | */ | |
463 | synchronize_rcu(); | |
464 | skb_queue_purge(&sdata->u.sta.skb_queue); | |
465 | ||
eb46936b VT |
466 | sdata->u.sta.flags &= ~(IEEE80211_STA_PRIVACY_INVOKED | |
467 | IEEE80211_STA_TKIP_WEP_USED); | |
0d143fe1 JB |
468 | kfree(sdata->u.sta.extra_ie); |
469 | sdata->u.sta.extra_ie = NULL; | |
470 | sdata->u.sta.extra_ie_len = 0; | |
471 | /* fall through */ | |
472 | case NL80211_IFTYPE_MESH_POINT: | |
473 | if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
a3c9aa51 AY |
474 | /* other_bss and allmulti are always set on mesh |
475 | * ifaces */ | |
476 | local->fif_other_bss--; | |
0d143fe1 | 477 | atomic_dec(&local->iff_allmultis); |
a3c9aa51 AY |
478 | |
479 | netif_addr_lock_bh(local->mdev); | |
480 | ieee80211_configure_filter(local); | |
481 | netif_addr_unlock_bh(local->mdev); | |
482 | ||
0d143fe1 JB |
483 | ieee80211_stop_mesh(sdata); |
484 | } | |
485 | /* fall through */ | |
486 | default: | |
487 | if (local->scan_sdata == sdata) { | |
488 | if (!local->ops->hw_scan) | |
489 | cancel_delayed_work_sync(&local->scan_work); | |
490 | /* | |
491 | * The software scan can no longer run now, so we can | |
492 | * clear out the scan_sdata reference. However, the | |
493 | * hardware scan may still be running. The complete | |
494 | * function must be prepared to handle a NULL value. | |
495 | */ | |
496 | local->scan_sdata = NULL; | |
497 | /* | |
498 | * The memory barrier guarantees that another CPU | |
499 | * that is hardware-scanning will now see the fact | |
500 | * that this interface is gone. | |
501 | */ | |
502 | smp_mb(); | |
503 | /* | |
504 | * If software scanning, complete the scan but since | |
505 | * the scan_sdata is NULL already don't send out a | |
506 | * scan event to userspace -- the scan is incomplete. | |
507 | */ | |
508 | if (local->sw_scanning) | |
509 | ieee80211_scan_completed(&local->hw); | |
510 | } | |
511 | ||
512 | conf.vif = &sdata->vif; | |
513 | conf.type = sdata->vif.type; | |
514 | conf.mac_addr = dev->dev_addr; | |
515 | /* disable all keys for as long as this netdev is down */ | |
516 | ieee80211_disable_keys(sdata); | |
517 | local->ops->remove_interface(local_to_hw(local), &conf); | |
518 | } | |
519 | ||
520 | sdata->bss = NULL; | |
521 | ||
522 | if (local->open_count == 0) { | |
523 | if (netif_running(local->mdev)) | |
524 | dev_close(local->mdev); | |
525 | ||
526 | if (local->ops->stop) | |
527 | local->ops->stop(local_to_hw(local)); | |
528 | ||
529 | ieee80211_led_radio(local, 0); | |
530 | ||
531 | flush_workqueue(local->hw.workqueue); | |
532 | ||
533 | tasklet_disable(&local->tx_pending_tasklet); | |
534 | tasklet_disable(&local->tasklet); | |
e8975581 JB |
535 | |
536 | /* no reconfiguring after stop! */ | |
537 | hw_reconf_flags = 0; | |
0d143fe1 JB |
538 | } |
539 | ||
e8975581 JB |
540 | /* do after stop to avoid reconfiguring when we stop anyway */ |
541 | if (hw_reconf_flags) | |
542 | ieee80211_hw_config(local, hw_reconf_flags); | |
543 | ||
0d143fe1 JB |
544 | return 0; |
545 | } | |
546 | ||
547 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
548 | { | |
0d143fe1 | 549 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b4a4bf5d | 550 | struct ieee80211_local *local = sdata->local; |
0d143fe1 JB |
551 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
552 | ||
553 | allmulti = !!(dev->flags & IFF_ALLMULTI); | |
554 | promisc = !!(dev->flags & IFF_PROMISC); | |
555 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); | |
556 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
557 | ||
558 | if (allmulti != sdata_allmulti) { | |
559 | if (dev->flags & IFF_ALLMULTI) | |
560 | atomic_inc(&local->iff_allmultis); | |
561 | else | |
562 | atomic_dec(&local->iff_allmultis); | |
563 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; | |
564 | } | |
565 | ||
566 | if (promisc != sdata_promisc) { | |
567 | if (dev->flags & IFF_PROMISC) | |
568 | atomic_inc(&local->iff_promiscs); | |
569 | else | |
570 | atomic_dec(&local->iff_promiscs); | |
571 | sdata->flags ^= IEEE80211_SDATA_PROMISC; | |
572 | } | |
573 | ||
574 | dev_mc_sync(local->mdev, dev); | |
575 | } | |
576 | ||
577 | static void ieee80211_if_setup(struct net_device *dev) | |
578 | { | |
579 | ether_setup(dev); | |
580 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
581 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
582 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
583 | dev->change_mtu = ieee80211_change_mtu; | |
584 | dev->open = ieee80211_open; | |
585 | dev->stop = ieee80211_stop; | |
586 | dev->destructor = free_netdev; | |
587 | /* we will validate the address ourselves in ->open */ | |
588 | dev->validate_addr = NULL; | |
589 | } | |
75636525 JB |
590 | /* |
591 | * Called when the netdev is removed or, by the code below, before | |
592 | * the interface type changes. | |
593 | */ | |
594 | static void ieee80211_teardown_sdata(struct net_device *dev) | |
f0706e82 | 595 | { |
75636525 JB |
596 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
597 | struct ieee80211_local *local = sdata->local; | |
598 | struct beacon_data *beacon; | |
599 | struct sk_buff *skb; | |
600 | int flushed; | |
f0706e82 JB |
601 | int i; |
602 | ||
75636525 JB |
603 | /* free extra data */ |
604 | ieee80211_free_keys(sdata); | |
605 | ||
aee14ceb JM |
606 | ieee80211_debugfs_remove_netdev(sdata); |
607 | ||
f0706e82 | 608 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
75636525 JB |
609 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
610 | sdata->fragment_next = 0; | |
11a843b7 | 611 | |
75636525 | 612 | switch (sdata->vif.type) { |
05c914fe | 613 | case NL80211_IFTYPE_AP: |
75636525 JB |
614 | beacon = sdata->u.ap.beacon; |
615 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
616 | synchronize_rcu(); | |
617 | kfree(beacon); | |
3e122be0 | 618 | |
75636525 JB |
619 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
620 | local->total_ps_buffered--; | |
621 | dev_kfree_skb(skb); | |
622 | } | |
623 | ||
624 | break; | |
05c914fe | 625 | case NL80211_IFTYPE_MESH_POINT: |
75636525 | 626 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
f698d856 | 627 | mesh_rmc_free(sdata); |
472dbc45 | 628 | break; |
05c914fe JB |
629 | case NL80211_IFTYPE_STATION: |
630 | case NL80211_IFTYPE_ADHOC: | |
75636525 JB |
631 | kfree(sdata->u.sta.extra_ie); |
632 | kfree(sdata->u.sta.assocreq_ies); | |
633 | kfree(sdata->u.sta.assocresp_ies); | |
634 | kfree_skb(sdata->u.sta.probe_resp); | |
9aed3cc1 JM |
635 | kfree(sdata->u.sta.ie_probereq); |
636 | kfree(sdata->u.sta.ie_proberesp); | |
637 | kfree(sdata->u.sta.ie_auth); | |
638 | kfree(sdata->u.sta.ie_assocreq); | |
639 | kfree(sdata->u.sta.ie_reassocreq); | |
640 | kfree(sdata->u.sta.ie_deauth); | |
641 | kfree(sdata->u.sta.ie_disassoc); | |
75636525 | 642 | break; |
05c914fe JB |
643 | case NL80211_IFTYPE_WDS: |
644 | case NL80211_IFTYPE_AP_VLAN: | |
645 | case NL80211_IFTYPE_MONITOR: | |
75636525 | 646 | break; |
05c914fe JB |
647 | case NL80211_IFTYPE_UNSPECIFIED: |
648 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
649 | BUG(); |
650 | break; | |
651 | } | |
652 | ||
653 | flushed = sta_info_flush(local, sdata); | |
654 | WARN_ON(flushed); | |
f0706e82 JB |
655 | } |
656 | ||
75636525 JB |
657 | /* |
658 | * Helper function to initialise an interface to a specific type. | |
659 | */ | |
660 | static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, | |
05c914fe | 661 | enum nl80211_iftype type) |
f0706e82 | 662 | { |
75636525 JB |
663 | /* clear type-dependent union */ |
664 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
665 | ||
666 | /* and set some type-dependent values */ | |
667 | sdata->vif.type = type; | |
e16ce63c | 668 | sdata->dev->hard_start_xmit = ieee80211_subif_start_xmit; |
60719ffd | 669 | sdata->wdev.iftype = type; |
75636525 JB |
670 | |
671 | /* only monitor differs */ | |
672 | sdata->dev->type = ARPHRD_ETHER; | |
673 | ||
674 | switch (type) { | |
05c914fe | 675 | case NL80211_IFTYPE_AP: |
75636525 JB |
676 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
677 | INIT_LIST_HEAD(&sdata->u.ap.vlans); | |
678 | break; | |
05c914fe JB |
679 | case NL80211_IFTYPE_STATION: |
680 | case NL80211_IFTYPE_ADHOC: | |
9c6bd790 | 681 | ieee80211_sta_setup_sdata(sdata); |
472dbc45 | 682 | break; |
05c914fe | 683 | case NL80211_IFTYPE_MESH_POINT: |
75636525 JB |
684 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
685 | ieee80211_mesh_init_sdata(sdata); | |
686 | break; | |
05c914fe | 687 | case NL80211_IFTYPE_MONITOR: |
75636525 JB |
688 | sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; |
689 | sdata->dev->hard_start_xmit = ieee80211_monitor_start_xmit; | |
690 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | | |
691 | MONITOR_FLAG_OTHER_BSS; | |
692 | break; | |
05c914fe JB |
693 | case NL80211_IFTYPE_WDS: |
694 | case NL80211_IFTYPE_AP_VLAN: | |
75636525 | 695 | break; |
05c914fe JB |
696 | case NL80211_IFTYPE_UNSPECIFIED: |
697 | case __NL80211_IFTYPE_AFTER_LAST: | |
75636525 JB |
698 | BUG(); |
699 | break; | |
700 | } | |
701 | ||
702 | ieee80211_debugfs_add_netdev(sdata); | |
703 | } | |
704 | ||
f3947e2d | 705 | int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata, |
05c914fe | 706 | enum nl80211_iftype type) |
75636525 | 707 | { |
f3947e2d JB |
708 | ASSERT_RTNL(); |
709 | ||
710 | if (type == sdata->vif.type) | |
711 | return 0; | |
712 | ||
e60c7744 | 713 | /* Setting ad-hoc mode on non-IBSS channel is not supported. */ |
dcebf45c PR |
714 | if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS && |
715 | type == NL80211_IFTYPE_ADHOC) | |
e60c7744 JB |
716 | return -EOPNOTSUPP; |
717 | ||
f3947e2d JB |
718 | /* |
719 | * We could, here, on changes between IBSS/STA/MESH modes, | |
720 | * invoke an MLME function instead that disassociates etc. | |
721 | * and goes into the requested mode. | |
722 | */ | |
723 | ||
724 | if (netif_running(sdata->dev)) | |
725 | return -EBUSY; | |
726 | ||
75636525 JB |
727 | /* Purge and reset type-dependent state. */ |
728 | ieee80211_teardown_sdata(sdata->dev); | |
729 | ieee80211_setup_sdata(sdata, type); | |
730 | ||
731 | /* reset some values that shouldn't be kept across type changes */ | |
bda3933a | 732 | sdata->vif.bss_conf.basic_rates = |
96dd22ac JB |
733 | ieee80211_mandatory_rates(sdata->local, |
734 | sdata->local->hw.conf.channel->band); | |
75636525 | 735 | sdata->drop_unencrypted = 0; |
f3947e2d JB |
736 | |
737 | return 0; | |
f0706e82 JB |
738 | } |
739 | ||
3e122be0 | 740 | int ieee80211_if_add(struct ieee80211_local *local, const char *name, |
05c914fe | 741 | struct net_device **new_dev, enum nl80211_iftype type, |
ee385855 | 742 | struct vif_params *params) |
f0706e82 JB |
743 | { |
744 | struct net_device *ndev; | |
f0706e82 | 745 | struct ieee80211_sub_if_data *sdata = NULL; |
75636525 | 746 | int ret, i; |
f0706e82 JB |
747 | |
748 | ASSERT_RTNL(); | |
75636525 | 749 | |
32bfd35d | 750 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
f0706e82 JB |
751 | name, ieee80211_if_setup); |
752 | if (!ndev) | |
753 | return -ENOMEM; | |
754 | ||
f3994ece JB |
755 | ndev->needed_headroom = local->tx_headroom + |
756 | 4*6 /* four MAC addresses */ | |
757 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
758 | + 6 /* mesh */ | |
759 | + 8 /* rfc1042/bridge tunnel */ | |
760 | - ETH_HLEN /* ethernet hard_header_len */ | |
761 | + IEEE80211_ENCRYPT_HEADROOM; | |
762 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
763 | ||
f0706e82 JB |
764 | ret = dev_alloc_name(ndev, ndev->name); |
765 | if (ret < 0) | |
766 | goto fail; | |
767 | ||
768 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
f0706e82 JB |
769 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
770 | ||
3e122be0 JB |
771 | /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */ |
772 | sdata = netdev_priv(ndev); | |
f0706e82 | 773 | ndev->ieee80211_ptr = &sdata->wdev; |
75636525 JB |
774 | |
775 | /* initialise type-independent data */ | |
f0706e82 | 776 | sdata->wdev.wiphy = local->hw.wiphy; |
f0706e82 | 777 | sdata->local = local; |
75636525 JB |
778 | sdata->dev = ndev; |
779 | ||
780 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
781 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
782 | ||
783 | INIT_LIST_HEAD(&sdata->key_list); | |
784 | ||
785 | sdata->force_unicast_rateidx = -1; | |
786 | sdata->max_ratectrl_rateidx = -1; | |
787 | ||
788 | /* setup type-dependent data */ | |
789 | ieee80211_setup_sdata(sdata, type); | |
f0706e82 JB |
790 | |
791 | ret = register_netdevice(ndev); | |
792 | if (ret) | |
793 | goto fail; | |
794 | ||
75636525 | 795 | ndev->uninit = ieee80211_teardown_sdata; |
f0706e82 | 796 | |
902acc78 JB |
797 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
798 | params && params->mesh_id_len) | |
472dbc45 JB |
799 | ieee80211_sdata_set_mesh_id(sdata, |
800 | params->mesh_id_len, | |
801 | params->mesh_id); | |
ee385855 | 802 | |
79010420 JB |
803 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
804 | ||
f0706e82 JB |
805 | if (new_dev) |
806 | *new_dev = ndev; | |
f0706e82 | 807 | |
f0706e82 JB |
808 | return 0; |
809 | ||
75636525 | 810 | fail: |
f0706e82 JB |
811 | free_netdev(ndev); |
812 | return ret; | |
813 | } | |
814 | ||
f698d856 | 815 | void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata) |
f0706e82 | 816 | { |
f0706e82 | 817 | ASSERT_RTNL(); |
11a843b7 | 818 | |
75636525 JB |
819 | list_del_rcu(&sdata->list); |
820 | synchronize_rcu(); | |
f698d856 | 821 | unregister_netdevice(sdata->dev); |
f0706e82 JB |
822 | } |
823 | ||
75636525 JB |
824 | /* |
825 | * Remove all interfaces, may only be called at hardware unregistration | |
826 | * time because it doesn't do RCU-safe list removals. | |
827 | */ | |
828 | void ieee80211_remove_interfaces(struct ieee80211_local *local) | |
f0706e82 | 829 | { |
75636525 | 830 | struct ieee80211_sub_if_data *sdata, *tmp; |
f0706e82 JB |
831 | |
832 | ASSERT_RTNL(); | |
833 | ||
75636525 JB |
834 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
835 | list_del(&sdata->list); | |
836 | unregister_netdevice(sdata->dev); | |
f0706e82 | 837 | } |
f0706e82 | 838 | } |