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-rw-r--r--net/mac80211/ieee80211_i.h2
-rw-r--r--net/mac80211/iface.c534
-rw-r--r--net/mac80211/main.c565
3 files changed, 550 insertions, 551 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 80d88f5ff90c..6bd6a6306da3 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -891,6 +891,7 @@ u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
891 struct ieee80211_ht_bss_info *req_bss_cap); 891 struct ieee80211_ht_bss_info *req_bss_cap);
892void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 892void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
893 u32 changed); 893 u32 changed);
894void ieee80211_configure_filter(struct ieee80211_local *local);
894 895
895/* wireless extensions */ 896/* wireless extensions */
896extern const struct iw_handler_def ieee80211_iw_handler_def; 897extern const struct iw_handler_def ieee80211_iw_handler_def;
@@ -952,7 +953,6 @@ void ieee80211_rx_bss_put(struct ieee80211_local *local,
952 struct ieee80211_bss *bss); 953 struct ieee80211_bss *bss);
953 954
954/* interface handling */ 955/* interface handling */
955void ieee80211_if_setup(struct net_device *dev);
956int ieee80211_if_add(struct ieee80211_local *local, const char *name, 956int ieee80211_if_add(struct ieee80211_local *local, const char *name,
957 struct net_device **new_dev, enum nl80211_iftype type, 957 struct net_device **new_dev, enum nl80211_iftype type,
958 struct vif_params *params); 958 struct vif_params *params);
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 004fb23241da..f528962b13e3 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1,4 +1,6 @@
1/* 1/*
2 * Interface handling (except master interface)
3 *
2 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> 6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
@@ -17,7 +19,539 @@
17#include "sta_info.h" 19#include "sta_info.h"
18#include "debugfs_netdev.h" 20#include "debugfs_netdev.h"
19#include "mesh.h" 21#include "mesh.h"
22#include "led.h"
23
24static 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
45static 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
59static int ieee80211_open(struct net_device *dev)
60{
61 struct ieee80211_sub_if_data *sdata, *nsdata;
62 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
63 struct sta_info *sta;
64 struct ieee80211_if_init_conf conf;
65 u32 changed = 0;
66 int res;
67 bool need_hw_reconfig = 0;
68 u8 null_addr[ETH_ALEN] = {0};
69
70 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
71
72 /* fail early if user set an invalid address */
73 if (compare_ether_addr(dev->dev_addr, null_addr) &&
74 !is_valid_ether_addr(dev->dev_addr))
75 return -EADDRNOTAVAIL;
76
77 /* we hold the RTNL here so can safely walk the list */
78 list_for_each_entry(nsdata, &local->interfaces, list) {
79 struct net_device *ndev = nsdata->dev;
80
81 if (ndev != dev && netif_running(ndev)) {
82 /*
83 * Allow only a single IBSS interface to be up at any
84 * time. This is restricted because beacon distribution
85 * cannot work properly if both are in the same IBSS.
86 *
87 * To remove this restriction we'd have to disallow them
88 * from setting the same SSID on different IBSS interfaces
89 * belonging to the same hardware. Then, however, we're
90 * faced with having to adopt two different TSF timers...
91 */
92 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
93 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
94 return -EBUSY;
95
96 /*
97 * The remaining checks are only performed for interfaces
98 * with the same MAC address.
99 */
100 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
101 continue;
102
103 /*
104 * check whether it may have the same address
105 */
106 if (!identical_mac_addr_allowed(sdata->vif.type,
107 nsdata->vif.type))
108 return -ENOTUNIQ;
109
110 /*
111 * can only add VLANs to enabled APs
112 */
113 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
114 nsdata->vif.type == NL80211_IFTYPE_AP)
115 sdata->bss = &nsdata->u.ap;
116 }
117 }
118
119 switch (sdata->vif.type) {
120 case NL80211_IFTYPE_WDS:
121 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
122 return -ENOLINK;
123 break;
124 case NL80211_IFTYPE_AP_VLAN:
125 if (!sdata->bss)
126 return -ENOLINK;
127 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
128 break;
129 case NL80211_IFTYPE_AP:
130 sdata->bss = &sdata->u.ap;
131 break;
132 case NL80211_IFTYPE_MESH_POINT:
133 if (!ieee80211_vif_is_mesh(&sdata->vif))
134 break;
135 /* mesh ifaces must set allmulti to forward mcast traffic */
136 atomic_inc(&local->iff_allmultis);
137 break;
138 case NL80211_IFTYPE_STATION:
139 case NL80211_IFTYPE_MONITOR:
140 case NL80211_IFTYPE_ADHOC:
141 /* no special treatment */
142 break;
143 case NL80211_IFTYPE_UNSPECIFIED:
144 case __NL80211_IFTYPE_AFTER_LAST:
145 /* cannot happen */
146 WARN_ON(1);
147 break;
148 }
149
150 if (local->open_count == 0) {
151 res = 0;
152 if (local->ops->start)
153 res = local->ops->start(local_to_hw(local));
154 if (res)
155 goto err_del_bss;
156 need_hw_reconfig = 1;
157 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
158 }
20 159
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++;
202 if (local->monitors == 1)
203 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
204
205 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
206 local->fif_fcsfail++;
207 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
208 local->fif_plcpfail++;
209 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
210 local->fif_control++;
211 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
212 local->fif_other_bss++;
213
214 netif_addr_lock_bh(local->mdev);
215 ieee80211_configure_filter(local);
216 netif_addr_unlock_bh(local->mdev);
217 break;
218 case NL80211_IFTYPE_STATION:
219 case NL80211_IFTYPE_ADHOC:
220 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
221 /* fall through */
222 default:
223 conf.vif = &sdata->vif;
224 conf.type = sdata->vif.type;
225 conf.mac_addr = dev->dev_addr;
226 res = local->ops->add_interface(local_to_hw(local), &conf);
227 if (res)
228 goto err_stop;
229
230 if (ieee80211_vif_is_mesh(&sdata->vif))
231 ieee80211_start_mesh(sdata);
232 changed |= ieee80211_reset_erp_info(sdata);
233 ieee80211_bss_info_change_notify(sdata, changed);
234 ieee80211_enable_keys(sdata);
235
236 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
237 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
238 netif_carrier_off(dev);
239 else
240 netif_carrier_on(dev);
241 }
242
243 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
244 /* Create STA entry for the WDS peer */
245 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
246 GFP_KERNEL);
247 if (!sta) {
248 res = -ENOMEM;
249 goto err_del_interface;
250 }
251
252 /* no locking required since STA is not live yet */
253 sta->flags |= WLAN_STA_AUTHORIZED;
254
255 res = sta_info_insert(sta);
256 if (res) {
257 /* STA has been freed */
258 goto err_del_interface;
259 }
260 }
261
262 if (local->open_count == 0) {
263 res = dev_open(local->mdev);
264 WARN_ON(res);
265 if (res)
266 goto err_del_interface;
267 tasklet_enable(&local->tx_pending_tasklet);
268 tasklet_enable(&local->tasklet);
269 }
270
271 /*
272 * set_multicast_list will be invoked by the networking core
273 * which will check whether any increments here were done in
274 * error and sync them down to the hardware as filter flags.
275 */
276 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
277 atomic_inc(&local->iff_allmultis);
278
279 if (sdata->flags & IEEE80211_SDATA_PROMISC)
280 atomic_inc(&local->iff_promiscs);
281
282 local->open_count++;
283 if (need_hw_reconfig) {
284 ieee80211_hw_config(local);
285 /*
286 * set default queue parameters so drivers don't
287 * need to initialise the hardware if the hardware
288 * doesn't start up with sane defaults
289 */
290 ieee80211_set_wmm_default(sdata);
291 }
292
293 /*
294 * ieee80211_sta_work is disabled while network interface
295 * is down. Therefore, some configuration changes may not
296 * yet be effective. Trigger execution of ieee80211_sta_work
297 * to fix this.
298 */
299 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
300 sdata->vif.type == NL80211_IFTYPE_ADHOC) {
301 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
302 queue_work(local->hw.workqueue, &ifsta->work);
303 }
304
305 netif_tx_start_all_queues(dev);
306
307 return 0;
308 err_del_interface:
309 local->ops->remove_interface(local_to_hw(local), &conf);
310 err_stop:
311 if (!local->open_count && local->ops->stop)
312 local->ops->stop(local_to_hw(local));
313 err_del_bss:
314 sdata->bss = NULL;
315 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
316 list_del(&sdata->u.vlan.list);
317 return res;
318}
319
320static int ieee80211_stop(struct net_device *dev)
321{
322 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
323 struct ieee80211_local *local = sdata->local;
324 struct ieee80211_if_init_conf conf;
325 struct sta_info *sta;
326
327 /*
328 * Stop TX on this interface first.
329 */
330 netif_tx_stop_all_queues(dev);
331
332 /*
333 * Now delete all active aggregation sessions.
334 */
335 rcu_read_lock();
336
337 list_for_each_entry_rcu(sta, &local->sta_list, list) {
338 if (sta->sdata == sdata)
339 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
340 }
341
342 rcu_read_unlock();
343
344 /*
345 * Remove all stations associated with this interface.
346 *
347 * This must be done before calling ops->remove_interface()
348 * because otherwise we can later invoke ops->sta_notify()
349 * whenever the STAs are removed, and that invalidates driver
350 * assumptions about always getting a vif pointer that is valid
351 * (because if we remove a STA after ops->remove_interface()
352 * the driver will have removed the vif info already!)
353 *
354 * We could relax this and only unlink the stations from the
355 * hash table and list but keep them on a per-sdata list that
356 * will be inserted back again when the interface is brought
357 * up again, but I don't currently see a use case for that,
358 * except with WDS which gets a STA entry created when it is
359 * brought up.
360 */
361 sta_info_flush(local, sdata);
362
363 /*
364 * Don't count this interface for promisc/allmulti while it
365 * is down. dev_mc_unsync() will invoke set_multicast_list
366 * on the master interface which will sync these down to the
367 * hardware as filter flags.
368 */
369 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
370 atomic_dec(&local->iff_allmultis);
371
372 if (sdata->flags & IEEE80211_SDATA_PROMISC)
373 atomic_dec(&local->iff_promiscs);
374
375 dev_mc_unsync(local->mdev, dev);
376
377 /* APs need special treatment */
378 if (sdata->vif.type == NL80211_IFTYPE_AP) {
379 struct ieee80211_sub_if_data *vlan, *tmp;
380 struct beacon_data *old_beacon = sdata->u.ap.beacon;
381
382 /* remove beacon */
383 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
384 synchronize_rcu();
385 kfree(old_beacon);
386
387 /* down all dependent devices, that is VLANs */
388 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
389 u.vlan.list)
390 dev_close(vlan->dev);
391 WARN_ON(!list_empty(&sdata->u.ap.vlans));
392 }
393
394 local->open_count--;
395
396 switch (sdata->vif.type) {
397 case NL80211_IFTYPE_AP_VLAN:
398 list_del(&sdata->u.vlan.list);
399 /* no need to tell driver */
400 break;
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
403 local->cooked_mntrs--;
404 break;
405 }
406
407 local->monitors--;
408 if (local->monitors == 0)
409 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
410
411 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
412 local->fif_fcsfail--;
413 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
414 local->fif_plcpfail--;
415 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
416 local->fif_control--;
417 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
418 local->fif_other_bss--;
419
420 netif_addr_lock_bh(local->mdev);
421 ieee80211_configure_filter(local);
422 netif_addr_unlock_bh(local->mdev);
423 break;
424 case NL80211_IFTYPE_STATION:
425 case NL80211_IFTYPE_ADHOC:
426 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
427 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
428 del_timer_sync(&sdata->u.sta.timer);
429 /*
430 * If the timer fired while we waited for it, it will have
431 * requeued the work. Now the work will be running again
432 * but will not rearm the timer again because it checks
433 * whether the interface is running, which, at this point,
434 * it no longer is.
435 */
436 cancel_work_sync(&sdata->u.sta.work);
437 /*
438 * When we get here, the interface is marked down.
439 * Call synchronize_rcu() to wait for the RX path
440 * should it be using the interface and enqueuing
441 * frames at this very time on another CPU.
442 */
443 synchronize_rcu();
444 skb_queue_purge(&sdata->u.sta.skb_queue);
445
446 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
447 kfree(sdata->u.sta.extra_ie);
448 sdata->u.sta.extra_ie = NULL;
449 sdata->u.sta.extra_ie_len = 0;
450 /* fall through */
451 case NL80211_IFTYPE_MESH_POINT:
452 if (ieee80211_vif_is_mesh(&sdata->vif)) {
453 /* allmulti is always set on mesh ifaces */
454 atomic_dec(&local->iff_allmultis);
455 ieee80211_stop_mesh(sdata);
456 }
457 /* fall through */
458 default:
459 if (local->scan_sdata == sdata) {
460 if (!local->ops->hw_scan)
461 cancel_delayed_work_sync(&local->scan_work);
462 /*
463 * The software scan can no longer run now, so we can
464 * clear out the scan_sdata reference. However, the
465 * hardware scan may still be running. The complete
466 * function must be prepared to handle a NULL value.
467 */
468 local->scan_sdata = NULL;
469 /*
470 * The memory barrier guarantees that another CPU
471 * that is hardware-scanning will now see the fact
472 * that this interface is gone.
473 */
474 smp_mb();
475 /*
476 * If software scanning, complete the scan but since
477 * the scan_sdata is NULL already don't send out a
478 * scan event to userspace -- the scan is incomplete.
479 */
480 if (local->sw_scanning)
481 ieee80211_scan_completed(&local->hw);
482 }
483
484 conf.vif = &sdata->vif;
485 conf.type = sdata->vif.type;
486 conf.mac_addr = dev->dev_addr;
487 /* disable all keys for as long as this netdev is down */
488 ieee80211_disable_keys(sdata);
489 local->ops->remove_interface(local_to_hw(local), &conf);
490 }
491
492 sdata->bss = NULL;
493
494 if (local->open_count == 0) {
495 if (netif_running(local->mdev))
496 dev_close(local->mdev);
497
498 if (local->ops->stop)
499 local->ops->stop(local_to_hw(local));
500
501 ieee80211_led_radio(local, 0);
502
503 flush_workqueue(local->hw.workqueue);
504
505 tasklet_disable(&local->tx_pending_tasklet);
506 tasklet_disable(&local->tasklet);
507 }
508
509 return 0;
510}
511
512static void ieee80211_set_multicast_list(struct net_device *dev)
513{
514 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
515 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
516 int allmulti, promisc, sdata_allmulti, sdata_promisc;
517
518 allmulti = !!(dev->flags & IFF_ALLMULTI);
519 promisc = !!(dev->flags & IFF_PROMISC);
520 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
521 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
522
523 if (allmulti != sdata_allmulti) {
524 if (dev->flags & IFF_ALLMULTI)
525 atomic_inc(&local->iff_allmultis);
526 else
527 atomic_dec(&local->iff_allmultis);
528 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
529 }
530
531 if (promisc != sdata_promisc) {
532 if (dev->flags & IFF_PROMISC)
533 atomic_inc(&local->iff_promiscs);
534 else
535 atomic_dec(&local->iff_promiscs);
536 sdata->flags ^= IEEE80211_SDATA_PROMISC;
537 }
538
539 dev_mc_sync(local->mdev, dev);
540}
541
542static void ieee80211_if_setup(struct net_device *dev)
543{
544 ether_setup(dev);
545 dev->hard_start_xmit = ieee80211_subif_start_xmit;
546 dev->wireless_handlers = &ieee80211_iw_handler_def;
547 dev->set_multicast_list = ieee80211_set_multicast_list;
548 dev->change_mtu = ieee80211_change_mtu;
549 dev->open = ieee80211_open;
550 dev->stop = ieee80211_stop;
551 dev->destructor = free_netdev;
552 /* we will validate the address ourselves in ->open */
553 dev->validate_addr = NULL;
554}
21/* 555/*
22 * Called when the netdev is removed or, by the code below, before 556 * Called when the netdev is removed or, by the code below, before
23 * the interface type changes. 557 * the interface type changes.
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 584a75bd6cfe..c532043c1a1c 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -45,16 +45,9 @@ struct ieee80211_tx_status_rtap_hdr {
45 u8 data_retries; 45 u8 data_retries;
46} __attribute__ ((packed)); 46} __attribute__ ((packed));
47 47
48/* common interface routines */
49
50static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51{
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54}
55 48
56/* must be called under mdev tx lock */ 49/* must be called under mdev tx lock */
57static void ieee80211_configure_filter(struct ieee80211_local *local) 50void ieee80211_configure_filter(struct ieee80211_local *local)
58{ 51{
59 unsigned int changed_flags; 52 unsigned int changed_flags;
60 unsigned int new_flags = 0; 53 unsigned int new_flags = 0;
@@ -97,6 +90,20 @@ static void ieee80211_configure_filter(struct ieee80211_local *local)
97 90
98/* master interface */ 91/* master interface */
99 92
93static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
94{
95 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
96 return ETH_ALEN;
97}
98
99static const struct header_ops ieee80211_header_ops = {
100 .create = eth_header,
101 .parse = header_parse_80211,
102 .rebuild = eth_rebuild_header,
103 .cache = eth_header_cache,
104 .cache_update = eth_header_cache_update,
105};
106
100static int ieee80211_master_open(struct net_device *dev) 107static int ieee80211_master_open(struct net_device *dev)
101{ 108{
102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); 109 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
@@ -139,548 +146,6 @@ static void ieee80211_master_set_multicast_list(struct net_device *dev)
139 ieee80211_configure_filter(local); 146 ieee80211_configure_filter(local);
140} 147}
141 148
142/* regular interfaces */
143
144static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
145{
146 int meshhdrlen;
147 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
148
149 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
150
151 /* FIX: what would be proper limits for MTU?
152 * This interface uses 802.3 frames. */
153 if (new_mtu < 256 ||
154 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
155 return -EINVAL;
156 }
157
158#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
159 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
160#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
161 dev->mtu = new_mtu;
162 return 0;
163}
164
165static inline int identical_mac_addr_allowed(int type1, int type2)
166{
167 return type1 == NL80211_IFTYPE_MONITOR ||
168 type2 == NL80211_IFTYPE_MONITOR ||
169 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
170 (type1 == NL80211_IFTYPE_WDS &&
171 (type2 == NL80211_IFTYPE_WDS ||
172 type2 == NL80211_IFTYPE_AP)) ||
173 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
174 (type1 == NL80211_IFTYPE_AP_VLAN &&
175 (type2 == NL80211_IFTYPE_AP ||
176 type2 == NL80211_IFTYPE_AP_VLAN));
177}
178
179static 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 sta_info *sta;
184 struct ieee80211_if_init_conf conf;
185 u32 changed = 0;
186 int res;
187 bool need_hw_reconfig = 0;
188 u8 null_addr[ETH_ALEN] = {0};
189
190 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
191
192 /* fail early if user set an invalid address */
193 if (compare_ether_addr(dev->dev_addr, null_addr) &&
194 !is_valid_ether_addr(dev->dev_addr))
195 return -EADDRNOTAVAIL;
196
197 /* we hold the RTNL here so can safely walk the list */
198 list_for_each_entry(nsdata, &local->interfaces, list) {
199 struct net_device *ndev = nsdata->dev;
200
201 if (ndev != dev && netif_running(ndev)) {
202 /*
203 * Allow only a single IBSS interface to be up at any
204 * time. This is restricted because beacon distribution
205 * cannot work properly if both are in the same IBSS.
206 *
207 * To remove this restriction we'd have to disallow them
208 * from setting the same SSID on different IBSS interfaces
209 * belonging to the same hardware. Then, however, we're
210 * faced with having to adopt two different TSF timers...
211 */
212 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
213 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
214 return -EBUSY;
215
216 /*
217 * The remaining checks are only performed for interfaces
218 * with the same MAC address.
219 */
220 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
221 continue;
222
223 /*
224 * check whether it may have the same address
225 */
226 if (!identical_mac_addr_allowed(sdata->vif.type,
227 nsdata->vif.type))
228 return -ENOTUNIQ;
229
230 /*
231 * can only add VLANs to enabled APs
232 */
233 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
234 nsdata->vif.type == NL80211_IFTYPE_AP)
235 sdata->bss = &nsdata->u.ap;
236 }
237 }
238
239 switch (sdata->vif.type) {
240 case NL80211_IFTYPE_WDS:
241 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
242 return -ENOLINK;
243 break;
244 case NL80211_IFTYPE_AP_VLAN:
245 if (!sdata->bss)
246 return -ENOLINK;
247 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
248 break;
249 case NL80211_IFTYPE_AP:
250 sdata->bss = &sdata->u.ap;
251 break;
252 case NL80211_IFTYPE_MESH_POINT:
253 if (!ieee80211_vif_is_mesh(&sdata->vif))
254 break;
255 /* mesh ifaces must set allmulti to forward mcast traffic */
256 atomic_inc(&local->iff_allmultis);
257 break;
258 case NL80211_IFTYPE_STATION:
259 case NL80211_IFTYPE_MONITOR:
260 case NL80211_IFTYPE_ADHOC:
261 /* no special treatment */
262 break;
263 case NL80211_IFTYPE_UNSPECIFIED:
264 case __NL80211_IFTYPE_AFTER_LAST:
265 /* cannot happen */
266 WARN_ON(1);
267 break;
268 }
269
270 if (local->open_count == 0) {
271 res = 0;
272 if (local->ops->start)
273 res = local->ops->start(local_to_hw(local));
274 if (res)
275 goto err_del_bss;
276 need_hw_reconfig = 1;
277 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
278 }
279
280 /*
281 * Check all interfaces and copy the hopefully now-present
282 * MAC address to those that have the special null one.
283 */
284 list_for_each_entry(nsdata, &local->interfaces, list) {
285 struct net_device *ndev = nsdata->dev;
286
287 /*
288 * No need to check netif_running since we do not allow
289 * it to start up with this invalid address.
290 */
291 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
292 memcpy(ndev->dev_addr,
293 local->hw.wiphy->perm_addr,
294 ETH_ALEN);
295 }
296
297 if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
298 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
299 ETH_ALEN);
300
301 /*
302 * Validate the MAC address for this device.
303 */
304 if (!is_valid_ether_addr(dev->dev_addr)) {
305 if (!local->open_count && local->ops->stop)
306 local->ops->stop(local_to_hw(local));
307 return -EADDRNOTAVAIL;
308 }
309
310 switch (sdata->vif.type) {
311 case NL80211_IFTYPE_AP_VLAN:
312 /* no need to tell driver */
313 break;
314 case NL80211_IFTYPE_MONITOR:
315 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
316 local->cooked_mntrs++;
317 break;
318 }
319
320 /* must be before the call to ieee80211_configure_filter */
321 local->monitors++;
322 if (local->monitors == 1)
323 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
324
325 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
326 local->fif_fcsfail++;
327 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
328 local->fif_plcpfail++;
329 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
330 local->fif_control++;
331 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
332 local->fif_other_bss++;
333
334 netif_addr_lock_bh(local->mdev);
335 ieee80211_configure_filter(local);
336 netif_addr_unlock_bh(local->mdev);
337 break;
338 case NL80211_IFTYPE_STATION:
339 case NL80211_IFTYPE_ADHOC:
340 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
341 /* fall through */
342 default:
343 conf.vif = &sdata->vif;
344 conf.type = sdata->vif.type;
345 conf.mac_addr = dev->dev_addr;
346 res = local->ops->add_interface(local_to_hw(local), &conf);
347 if (res)
348 goto err_stop;
349
350 if (ieee80211_vif_is_mesh(&sdata->vif))
351 ieee80211_start_mesh(sdata);
352 changed |= ieee80211_reset_erp_info(sdata);
353 ieee80211_bss_info_change_notify(sdata, changed);
354 ieee80211_enable_keys(sdata);
355
356 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
357 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
358 netif_carrier_off(dev);
359 else
360 netif_carrier_on(dev);
361 }
362
363 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
364 /* Create STA entry for the WDS peer */
365 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
366 GFP_KERNEL);
367 if (!sta) {
368 res = -ENOMEM;
369 goto err_del_interface;
370 }
371
372 /* no locking required since STA is not live yet */
373 sta->flags |= WLAN_STA_AUTHORIZED;
374
375 res = sta_info_insert(sta);
376 if (res) {
377 /* STA has been freed */
378 goto err_del_interface;
379 }
380 }
381
382 if (local->open_count == 0) {
383 res = dev_open(local->mdev);
384 WARN_ON(res);
385 if (res)
386 goto err_del_interface;
387 tasklet_enable(&local->tx_pending_tasklet);
388 tasklet_enable(&local->tasklet);
389 }
390
391 /*
392 * set_multicast_list will be invoked by the networking core
393 * which will check whether any increments here were done in
394 * error and sync them down to the hardware as filter flags.
395 */
396 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
397 atomic_inc(&local->iff_allmultis);
398
399 if (sdata->flags & IEEE80211_SDATA_PROMISC)
400 atomic_inc(&local->iff_promiscs);
401
402 local->open_count++;
403 if (need_hw_reconfig) {
404 ieee80211_hw_config(local);
405 /*
406 * set default queue parameters so drivers don't
407 * need to initialise the hardware if the hardware
408 * doesn't start up with sane defaults
409 */
410 ieee80211_set_wmm_default(sdata);
411 }
412
413 /*
414 * ieee80211_sta_work is disabled while network interface
415 * is down. Therefore, some configuration changes may not
416 * yet be effective. Trigger execution of ieee80211_sta_work
417 * to fix this.
418 */
419 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
420 sdata->vif.type == NL80211_IFTYPE_ADHOC) {
421 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
422 queue_work(local->hw.workqueue, &ifsta->work);
423 }
424
425 netif_tx_start_all_queues(dev);
426
427 return 0;
428 err_del_interface:
429 local->ops->remove_interface(local_to_hw(local), &conf);
430 err_stop:
431 if (!local->open_count && local->ops->stop)
432 local->ops->stop(local_to_hw(local));
433 err_del_bss:
434 sdata->bss = NULL;
435 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
436 list_del(&sdata->u.vlan.list);
437 return res;
438}
439
440static int ieee80211_stop(struct net_device *dev)
441{
442 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
443 struct ieee80211_local *local = sdata->local;
444 struct ieee80211_if_init_conf conf;
445 struct sta_info *sta;
446
447 /*
448 * Stop TX on this interface first.
449 */
450 netif_tx_stop_all_queues(dev);
451
452 /*
453 * Now delete all active aggregation sessions.
454 */
455 rcu_read_lock();
456
457 list_for_each_entry_rcu(sta, &local->sta_list, list) {
458 if (sta->sdata == sdata)
459 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
460 }
461
462 rcu_read_unlock();
463
464 /*
465 * Remove all stations associated with this interface.
466 *
467 * This must be done before calling ops->remove_interface()
468 * because otherwise we can later invoke ops->sta_notify()
469 * whenever the STAs are removed, and that invalidates driver
470 * assumptions about always getting a vif pointer that is valid
471 * (because if we remove a STA after ops->remove_interface()
472 * the driver will have removed the vif info already!)
473 *
474 * We could relax this and only unlink the stations from the
475 * hash table and list but keep them on a per-sdata list that
476 * will be inserted back again when the interface is brought
477 * up again, but I don't currently see a use case for that,
478 * except with WDS which gets a STA entry created when it is
479 * brought up.
480 */
481 sta_info_flush(local, sdata);
482
483 /*
484 * Don't count this interface for promisc/allmulti while it
485 * is down. dev_mc_unsync() will invoke set_multicast_list
486 * on the master interface which will sync these down to the
487 * hardware as filter flags.
488 */
489 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
490 atomic_dec(&local->iff_allmultis);
491
492 if (sdata->flags & IEEE80211_SDATA_PROMISC)
493 atomic_dec(&local->iff_promiscs);
494
495 dev_mc_unsync(local->mdev, dev);
496
497 /* APs need special treatment */
498 if (sdata->vif.type == NL80211_IFTYPE_AP) {
499 struct ieee80211_sub_if_data *vlan, *tmp;
500 struct beacon_data *old_beacon = sdata->u.ap.beacon;
501
502 /* remove beacon */
503 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
504 synchronize_rcu();
505 kfree(old_beacon);
506
507 /* down all dependent devices, that is VLANs */
508 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
509 u.vlan.list)
510 dev_close(vlan->dev);
511 WARN_ON(!list_empty(&sdata->u.ap.vlans));
512 }
513
514 local->open_count--;
515
516 switch (sdata->vif.type) {
517 case NL80211_IFTYPE_AP_VLAN:
518 list_del(&sdata->u.vlan.list);
519 /* no need to tell driver */
520 break;
521 case NL80211_IFTYPE_MONITOR:
522 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
523 local->cooked_mntrs--;
524 break;
525 }
526
527 local->monitors--;
528 if (local->monitors == 0)
529 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
530
531 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
532 local->fif_fcsfail--;
533 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
534 local->fif_plcpfail--;
535 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
536 local->fif_control--;
537 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
538 local->fif_other_bss--;
539
540 netif_addr_lock_bh(local->mdev);
541 ieee80211_configure_filter(local);
542 netif_addr_unlock_bh(local->mdev);
543 break;
544 case NL80211_IFTYPE_STATION:
545 case NL80211_IFTYPE_ADHOC:
546 sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
547 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
548 del_timer_sync(&sdata->u.sta.timer);
549 /*
550 * If the timer fired while we waited for it, it will have
551 * requeued the work. Now the work will be running again
552 * but will not rearm the timer again because it checks
553 * whether the interface is running, which, at this point,
554 * it no longer is.
555 */
556 cancel_work_sync(&sdata->u.sta.work);
557 /*
558 * When we get here, the interface is marked down.
559 * Call synchronize_rcu() to wait for the RX path
560 * should it be using the interface and enqueuing
561 * frames at this very time on another CPU.
562 */
563 synchronize_rcu();
564 skb_queue_purge(&sdata->u.sta.skb_queue);
565
566 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
567 kfree(sdata->u.sta.extra_ie);
568 sdata->u.sta.extra_ie = NULL;
569 sdata->u.sta.extra_ie_len = 0;
570 /* fall through */
571 case NL80211_IFTYPE_MESH_POINT:
572 if (ieee80211_vif_is_mesh(&sdata->vif)) {
573 /* allmulti is always set on mesh ifaces */
574 atomic_dec(&local->iff_allmultis);
575 ieee80211_stop_mesh(sdata);
576 }
577 /* fall through */
578 default:
579 if (local->scan_sdata == sdata) {
580 if (!local->ops->hw_scan)
581 cancel_delayed_work_sync(&local->scan_work);
582 /*
583 * The software scan can no longer run now, so we can
584 * clear out the scan_sdata reference. However, the
585 * hardware scan may still be running. The complete
586 * function must be prepared to handle a NULL value.
587 */
588 local->scan_sdata = NULL;
589 /*
590 * The memory barrier guarantees that another CPU
591 * that is hardware-scanning will now see the fact
592 * that this interface is gone.
593 */
594 smp_mb();
595 /*
596 * If software scanning, complete the scan but since
597 * the scan_sdata is NULL already don't send out a
598 * scan event to userspace -- the scan is incomplete.
599 */
600 if (local->sw_scanning)
601 ieee80211_scan_completed(&local->hw);
602 }
603
604 conf.vif = &sdata->vif;
605 conf.type = sdata->vif.type;
606 conf.mac_addr = dev->dev_addr;
607 /* disable all keys for as long as this netdev is down */
608 ieee80211_disable_keys(sdata);
609 local->ops->remove_interface(local_to_hw(local), &conf);
610 }
611
612 sdata->bss = NULL;
613
614 if (local->open_count == 0) {
615 if (netif_running(local->mdev))
616 dev_close(local->mdev);
617
618 if (local->ops->stop)
619 local->ops->stop(local_to_hw(local));
620
621 ieee80211_led_radio(local, 0);
622
623 flush_workqueue(local->hw.workqueue);
624
625 tasklet_disable(&local->tx_pending_tasklet);
626 tasklet_disable(&local->tasklet);
627 }
628
629 return 0;
630}
631
632static void ieee80211_set_multicast_list(struct net_device *dev)
633{
634 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
635 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
636 int allmulti, promisc, sdata_allmulti, sdata_promisc;
637
638 allmulti = !!(dev->flags & IFF_ALLMULTI);
639 promisc = !!(dev->flags & IFF_PROMISC);
640 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
641 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
642
643 if (allmulti != sdata_allmulti) {
644 if (dev->flags & IFF_ALLMULTI)
645 atomic_inc(&local->iff_allmultis);
646 else
647 atomic_dec(&local->iff_allmultis);
648 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
649 }
650
651 if (promisc != sdata_promisc) {
652 if (dev->flags & IFF_PROMISC)
653 atomic_inc(&local->iff_promiscs);
654 else
655 atomic_dec(&local->iff_promiscs);
656 sdata->flags ^= IEEE80211_SDATA_PROMISC;
657 }
658
659 dev_mc_sync(local->mdev, dev);
660}
661
662static const struct header_ops ieee80211_header_ops = {
663 .create = eth_header,
664 .parse = header_parse_80211,
665 .rebuild = eth_rebuild_header,
666 .cache = eth_header_cache,
667 .cache_update = eth_header_cache_update,
668};
669
670void ieee80211_if_setup(struct net_device *dev)
671{
672 ether_setup(dev);
673 dev->hard_start_xmit = ieee80211_subif_start_xmit;
674 dev->wireless_handlers = &ieee80211_iw_handler_def;
675 dev->set_multicast_list = ieee80211_set_multicast_list;
676 dev->change_mtu = ieee80211_change_mtu;
677 dev->open = ieee80211_open;
678 dev->stop = ieee80211_stop;
679 dev->destructor = free_netdev;
680 /* we will validate the address ourselves in ->open */
681 dev->validate_addr = NULL;
682}
683
684/* everything else */ 149/* everything else */
685 150
686int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) 151int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-04 06:53:14 -0500