Commit | Line | Data |
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f0706e82 JB |
1 | /* |
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> | |
f0706e82 | 23 | #include <linux/bitmap.h> |
881d966b | 24 | #include <net/net_namespace.h> |
f0706e82 JB |
25 | #include <net/cfg80211.h> |
26 | ||
f0706e82 JB |
27 | #include "ieee80211_i.h" |
28 | #include "ieee80211_rate.h" | |
29 | #include "wep.h" | |
f0706e82 JB |
30 | #include "wme.h" |
31 | #include "aes_ccm.h" | |
32 | #include "ieee80211_led.h" | |
e0eb6859 | 33 | #include "cfg.h" |
e9f207f0 JB |
34 | #include "debugfs.h" |
35 | #include "debugfs_netdev.h" | |
f0706e82 | 36 | |
d3c990fb RR |
37 | #define SUPP_MCS_SET_LEN 16 |
38 | ||
b306f453 JB |
39 | /* |
40 | * For seeing transmitted packets on monitor interfaces | |
41 | * we have a radiotap header too. | |
42 | */ | |
43 | struct ieee80211_tx_status_rtap_hdr { | |
44 | struct ieee80211_radiotap_header hdr; | |
45 | __le16 tx_flags; | |
46 | u8 data_retries; | |
47 | } __attribute__ ((packed)); | |
48 | ||
b2c258fb | 49 | /* common interface routines */ |
b306f453 | 50 | |
b95cce35 | 51 | static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr) |
b2c258fb JB |
52 | { |
53 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
54 | return ETH_ALEN; | |
55 | } | |
f0706e82 | 56 | |
4150c572 JB |
57 | /* must be called under mdev tx lock */ |
58 | static void ieee80211_configure_filter(struct ieee80211_local *local) | |
59 | { | |
60 | unsigned int changed_flags; | |
61 | unsigned int new_flags = 0; | |
62 | ||
53918994 | 63 | if (atomic_read(&local->iff_promiscs)) |
4150c572 JB |
64 | new_flags |= FIF_PROMISC_IN_BSS; |
65 | ||
53918994 | 66 | if (atomic_read(&local->iff_allmultis)) |
4150c572 JB |
67 | new_flags |= FIF_ALLMULTI; |
68 | ||
69 | if (local->monitors) | |
70 | new_flags |= FIF_CONTROL | | |
71 | FIF_OTHER_BSS | | |
72 | FIF_BCN_PRBRESP_PROMISC; | |
73 | ||
74 | changed_flags = local->filter_flags ^ new_flags; | |
75 | ||
76 | /* be a bit nasty */ | |
77 | new_flags |= (1<<31); | |
78 | ||
79 | local->ops->configure_filter(local_to_hw(local), | |
80 | changed_flags, &new_flags, | |
81 | local->mdev->mc_count, | |
82 | local->mdev->mc_list); | |
83 | ||
84 | WARN_ON(new_flags & (1<<31)); | |
85 | ||
86 | local->filter_flags = new_flags & ~(1<<31); | |
87 | } | |
88 | ||
b2c258fb | 89 | /* master interface */ |
f0706e82 | 90 | |
b2c258fb JB |
91 | static int ieee80211_master_open(struct net_device *dev) |
92 | { | |
93 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
94 | struct ieee80211_sub_if_data *sdata; | |
95 | int res = -EOPNOTSUPP; | |
f0706e82 | 96 | |
79010420 JB |
97 | /* we hold the RTNL here so can safely walk the list */ |
98 | list_for_each_entry(sdata, &local->interfaces, list) { | |
b2c258fb JB |
99 | if (sdata->dev != dev && netif_running(sdata->dev)) { |
100 | res = 0; | |
101 | break; | |
102 | } | |
103 | } | |
b2c258fb JB |
104 | return res; |
105 | } | |
f0706e82 | 106 | |
b2c258fb | 107 | static int ieee80211_master_stop(struct net_device *dev) |
f0706e82 | 108 | { |
b2c258fb JB |
109 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
110 | struct ieee80211_sub_if_data *sdata; | |
f0706e82 | 111 | |
79010420 JB |
112 | /* we hold the RTNL here so can safely walk the list */ |
113 | list_for_each_entry(sdata, &local->interfaces, list) | |
b2c258fb JB |
114 | if (sdata->dev != dev && netif_running(sdata->dev)) |
115 | dev_close(sdata->dev); | |
f0706e82 | 116 | |
b2c258fb JB |
117 | return 0; |
118 | } | |
f0706e82 | 119 | |
4150c572 JB |
120 | static void ieee80211_master_set_multicast_list(struct net_device *dev) |
121 | { | |
122 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
123 | ||
124 | ieee80211_configure_filter(local); | |
125 | } | |
126 | ||
b2c258fb | 127 | /* regular interfaces */ |
f0706e82 | 128 | |
b2c258fb | 129 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
f0706e82 | 130 | { |
b2c258fb JB |
131 | /* FIX: what would be proper limits for MTU? |
132 | * This interface uses 802.3 frames. */ | |
133 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { | |
134 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
135 | dev->name, new_mtu); | |
136 | return -EINVAL; | |
137 | } | |
f0706e82 | 138 | |
b2c258fb JB |
139 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
140 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
141 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
142 | dev->mtu = new_mtu; | |
f0706e82 JB |
143 | return 0; |
144 | } | |
145 | ||
b2c258fb JB |
146 | static inline int identical_mac_addr_allowed(int type1, int type2) |
147 | { | |
148 | return (type1 == IEEE80211_IF_TYPE_MNTR || | |
149 | type2 == IEEE80211_IF_TYPE_MNTR || | |
150 | (type1 == IEEE80211_IF_TYPE_AP && | |
151 | type2 == IEEE80211_IF_TYPE_WDS) || | |
152 | (type1 == IEEE80211_IF_TYPE_WDS && | |
153 | (type2 == IEEE80211_IF_TYPE_WDS || | |
154 | type2 == IEEE80211_IF_TYPE_AP)) || | |
155 | (type1 == IEEE80211_IF_TYPE_AP && | |
156 | type2 == IEEE80211_IF_TYPE_VLAN) || | |
157 | (type1 == IEEE80211_IF_TYPE_VLAN && | |
158 | (type2 == IEEE80211_IF_TYPE_AP || | |
159 | type2 == IEEE80211_IF_TYPE_VLAN))); | |
160 | } | |
f0706e82 | 161 | |
b2c258fb | 162 | static int ieee80211_open(struct net_device *dev) |
e2ebc74d | 163 | { |
b2c258fb JB |
164 | struct ieee80211_sub_if_data *sdata, *nsdata; |
165 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
166 | struct ieee80211_if_init_conf conf; | |
167 | int res; | |
ceffefd1 | 168 | bool need_hw_reconfig = 0; |
f0706e82 | 169 | |
b2c258fb | 170 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
0ec3ca44 | 171 | |
79010420 JB |
172 | /* we hold the RTNL here so can safely walk the list */ |
173 | list_for_each_entry(nsdata, &local->interfaces, list) { | |
b2c258fb | 174 | struct net_device *ndev = nsdata->dev; |
e2ebc74d | 175 | |
b2c258fb | 176 | if (ndev != dev && ndev != local->mdev && netif_running(ndev) && |
0ec3ca44 JB |
177 | compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) { |
178 | /* | |
179 | * check whether it may have the same address | |
180 | */ | |
51fb61e7 JB |
181 | if (!identical_mac_addr_allowed(sdata->vif.type, |
182 | nsdata->vif.type)) | |
0ec3ca44 | 183 | return -ENOTUNIQ; |
0ec3ca44 JB |
184 | |
185 | /* | |
186 | * can only add VLANs to enabled APs | |
187 | */ | |
51fb61e7 JB |
188 | if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN && |
189 | nsdata->vif.type == IEEE80211_IF_TYPE_AP && | |
0ec3ca44 JB |
190 | netif_running(nsdata->dev)) |
191 | sdata->u.vlan.ap = nsdata; | |
b2c258fb JB |
192 | } |
193 | } | |
f0706e82 | 194 | |
51fb61e7 | 195 | switch (sdata->vif.type) { |
0ec3ca44 JB |
196 | case IEEE80211_IF_TYPE_WDS: |
197 | if (is_zero_ether_addr(sdata->u.wds.remote_addr)) | |
198 | return -ENOLINK; | |
199 | break; | |
200 | case IEEE80211_IF_TYPE_VLAN: | |
201 | if (!sdata->u.vlan.ap) | |
202 | return -ENOLINK; | |
203 | break; | |
fb1c1cd6 | 204 | case IEEE80211_IF_TYPE_AP: |
fb1c1cd6 JB |
205 | case IEEE80211_IF_TYPE_STA: |
206 | case IEEE80211_IF_TYPE_MNTR: | |
207 | case IEEE80211_IF_TYPE_IBSS: | |
208 | /* no special treatment */ | |
209 | break; | |
a2897552 JB |
210 | case IEEE80211_IF_TYPE_INVALID: |
211 | /* cannot happen */ | |
212 | WARN_ON(1); | |
213 | break; | |
0ec3ca44 | 214 | } |
f0706e82 | 215 | |
b2c258fb JB |
216 | if (local->open_count == 0) { |
217 | res = 0; | |
4150c572 JB |
218 | if (local->ops->start) |
219 | res = local->ops->start(local_to_hw(local)); | |
220 | if (res) | |
b2c258fb | 221 | return res; |
ceffefd1 | 222 | need_hw_reconfig = 1; |
cdcb006f | 223 | ieee80211_led_radio(local, local->hw.conf.radio_enabled); |
b2c258fb | 224 | } |
f0706e82 | 225 | |
51fb61e7 | 226 | switch (sdata->vif.type) { |
0ec3ca44 JB |
227 | case IEEE80211_IF_TYPE_VLAN: |
228 | list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans); | |
229 | /* no need to tell driver */ | |
230 | break; | |
4150c572 JB |
231 | case IEEE80211_IF_TYPE_MNTR: |
232 | /* must be before the call to ieee80211_configure_filter */ | |
b2c258fb | 233 | local->monitors++; |
4150c572 JB |
234 | if (local->monitors == 1) { |
235 | netif_tx_lock_bh(local->mdev); | |
236 | ieee80211_configure_filter(local); | |
237 | netif_tx_unlock_bh(local->mdev); | |
238 | ||
239 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
4150c572 JB |
240 | } |
241 | break; | |
242 | case IEEE80211_IF_TYPE_STA: | |
243 | case IEEE80211_IF_TYPE_IBSS: | |
244 | sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET; | |
245 | /* fall through */ | |
246 | default: | |
32bfd35d | 247 | conf.vif = &sdata->vif; |
51fb61e7 | 248 | conf.type = sdata->vif.type; |
4150c572 JB |
249 | conf.mac_addr = dev->dev_addr; |
250 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
251 | if (res && !local->open_count && local->ops->stop) | |
252 | local->ops->stop(local_to_hw(local)); | |
253 | if (res) | |
254 | return res; | |
255 | ||
b2c258fb | 256 | ieee80211_if_config(dev); |
d9430a32 | 257 | ieee80211_reset_erp_info(dev); |
11a843b7 | 258 | ieee80211_enable_keys(sdata); |
4150c572 | 259 | |
51fb61e7 | 260 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA && |
ddd3d2be | 261 | !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)) |
4150c572 JB |
262 | netif_carrier_off(dev); |
263 | else | |
264 | netif_carrier_on(dev); | |
d9430a32 | 265 | } |
f0706e82 | 266 | |
4150c572 JB |
267 | if (local->open_count == 0) { |
268 | res = dev_open(local->mdev); | |
269 | WARN_ON(res); | |
4150c572 JB |
270 | tasklet_enable(&local->tx_pending_tasklet); |
271 | tasklet_enable(&local->tasklet); | |
272 | } | |
273 | ||
c1428b3f JB |
274 | /* |
275 | * set_multicast_list will be invoked by the networking core | |
276 | * which will check whether any increments here were done in | |
277 | * error and sync them down to the hardware as filter flags. | |
278 | */ | |
279 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
280 | atomic_inc(&local->iff_allmultis); | |
281 | ||
282 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
283 | atomic_inc(&local->iff_promiscs); | |
284 | ||
4150c572 | 285 | local->open_count++; |
ceffefd1 MB |
286 | if (need_hw_reconfig) |
287 | ieee80211_hw_config(local); | |
f0706e82 | 288 | |
b2c258fb | 289 | netif_start_queue(dev); |
4150c572 | 290 | |
b2c258fb | 291 | return 0; |
f0706e82 | 292 | } |
f0706e82 | 293 | |
4150c572 | 294 | static int ieee80211_stop(struct net_device *dev) |
f0706e82 | 295 | { |
4150c572 | 296 | struct ieee80211_sub_if_data *sdata; |
f0706e82 | 297 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
4150c572 | 298 | struct ieee80211_if_init_conf conf; |
07db2183 RR |
299 | struct sta_info *sta; |
300 | int i; | |
4150c572 JB |
301 | |
302 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
303 | ||
07db2183 | 304 | list_for_each_entry(sta, &local->sta_list, list) { |
5b3d71d9 RR |
305 | if (sta->dev == dev) |
306 | for (i = 0; i < STA_TID_NUM; i++) | |
307 | ieee80211_sta_stop_rx_ba_session(sta->dev, | |
308 | sta->addr, i, | |
309 | WLAN_BACK_RECIPIENT, | |
07db2183 RR |
310 | WLAN_REASON_QSTA_LEAVE_QBSS); |
311 | } | |
312 | ||
4150c572 JB |
313 | netif_stop_queue(dev); |
314 | ||
c1428b3f JB |
315 | /* |
316 | * Don't count this interface for promisc/allmulti while it | |
317 | * is down. dev_mc_unsync() will invoke set_multicast_list | |
318 | * on the master interface which will sync these down to the | |
319 | * hardware as filter flags. | |
320 | */ | |
321 | if (sdata->flags & IEEE80211_SDATA_ALLMULTI) | |
322 | atomic_dec(&local->iff_allmultis); | |
323 | ||
324 | if (sdata->flags & IEEE80211_SDATA_PROMISC) | |
325 | atomic_dec(&local->iff_promiscs); | |
326 | ||
4150c572 JB |
327 | dev_mc_unsync(local->mdev, dev); |
328 | ||
5dfdaf58 | 329 | /* APs need special treatment */ |
51fb61e7 | 330 | if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
0ec3ca44 | 331 | struct ieee80211_sub_if_data *vlan, *tmp; |
5dfdaf58 | 332 | struct beacon_data *old_beacon = sdata->u.ap.beacon; |
0ec3ca44 | 333 | |
5dfdaf58 JB |
334 | /* remove beacon */ |
335 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
336 | synchronize_rcu(); | |
337 | kfree(old_beacon); | |
338 | ||
339 | /* down all dependent devices, that is VLANs */ | |
0ec3ca44 JB |
340 | list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans, |
341 | u.vlan.list) | |
342 | dev_close(vlan->dev); | |
343 | WARN_ON(!list_empty(&sdata->u.ap.vlans)); | |
344 | } | |
345 | ||
4150c572 | 346 | local->open_count--; |
f0706e82 | 347 | |
51fb61e7 | 348 | switch (sdata->vif.type) { |
0ec3ca44 JB |
349 | case IEEE80211_IF_TYPE_VLAN: |
350 | list_del(&sdata->u.vlan.list); | |
351 | sdata->u.vlan.ap = NULL; | |
352 | /* no need to tell driver */ | |
353 | break; | |
4150c572 JB |
354 | case IEEE80211_IF_TYPE_MNTR: |
355 | local->monitors--; | |
356 | if (local->monitors == 0) { | |
357 | netif_tx_lock_bh(local->mdev); | |
358 | ieee80211_configure_filter(local); | |
359 | netif_tx_unlock_bh(local->mdev); | |
360 | ||
8b393f1d | 361 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
4150c572 JB |
362 | } |
363 | break; | |
b2c258fb JB |
364 | case IEEE80211_IF_TYPE_STA: |
365 | case IEEE80211_IF_TYPE_IBSS: | |
366 | sdata->u.sta.state = IEEE80211_DISABLED; | |
367 | del_timer_sync(&sdata->u.sta.timer); | |
2a8a9a88 | 368 | /* |
79010420 JB |
369 | * When we get here, the interface is marked down. |
370 | * Call synchronize_rcu() to wait for the RX path | |
371 | * should it be using the interface and enqueuing | |
372 | * frames at this very time on another CPU. | |
2a8a9a88 | 373 | */ |
79010420 | 374 | synchronize_rcu(); |
b2c258fb | 375 | skb_queue_purge(&sdata->u.sta.skb_queue); |
2a8a9a88 | 376 | |
ece8eddd ZY |
377 | if (local->scan_dev == sdata->dev) { |
378 | if (!local->ops->hw_scan) { | |
379 | local->sta_sw_scanning = 0; | |
380 | cancel_delayed_work(&local->scan_work); | |
381 | } else | |
382 | local->sta_hw_scanning = 0; | |
b2c258fb | 383 | } |
ece8eddd | 384 | |
b2c258fb | 385 | flush_workqueue(local->hw.workqueue); |
a10605e5 ZY |
386 | |
387 | sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED; | |
388 | kfree(sdata->u.sta.extra_ie); | |
389 | sdata->u.sta.extra_ie = NULL; | |
390 | sdata->u.sta.extra_ie_len = 0; | |
4150c572 JB |
391 | /* fall through */ |
392 | default: | |
32bfd35d | 393 | conf.vif = &sdata->vif; |
51fb61e7 | 394 | conf.type = sdata->vif.type; |
4150c572 | 395 | conf.mac_addr = dev->dev_addr; |
11a843b7 JB |
396 | /* disable all keys for as long as this netdev is down */ |
397 | ieee80211_disable_keys(sdata); | |
4150c572 | 398 | local->ops->remove_interface(local_to_hw(local), &conf); |
f0706e82 JB |
399 | } |
400 | ||
b2c258fb JB |
401 | if (local->open_count == 0) { |
402 | if (netif_running(local->mdev)) | |
403 | dev_close(local->mdev); | |
4150c572 | 404 | |
b2c258fb JB |
405 | if (local->ops->stop) |
406 | local->ops->stop(local_to_hw(local)); | |
4150c572 | 407 | |
cdcb006f ID |
408 | ieee80211_led_radio(local, 0); |
409 | ||
b2c258fb JB |
410 | tasklet_disable(&local->tx_pending_tasklet); |
411 | tasklet_disable(&local->tasklet); | |
412 | } | |
b2c258fb | 413 | |
f0706e82 JB |
414 | return 0; |
415 | } | |
416 | ||
f0706e82 JB |
417 | static void ieee80211_set_multicast_list(struct net_device *dev) |
418 | { | |
419 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
420 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4150c572 | 421 | int allmulti, promisc, sdata_allmulti, sdata_promisc; |
f0706e82 | 422 | |
4150c572 JB |
423 | allmulti = !!(dev->flags & IFF_ALLMULTI); |
424 | promisc = !!(dev->flags & IFF_PROMISC); | |
b52f2198 JB |
425 | sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI); |
426 | sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC); | |
4150c572 JB |
427 | |
428 | if (allmulti != sdata_allmulti) { | |
429 | if (dev->flags & IFF_ALLMULTI) | |
53918994 | 430 | atomic_inc(&local->iff_allmultis); |
4150c572 | 431 | else |
53918994 | 432 | atomic_dec(&local->iff_allmultis); |
13262ffd | 433 | sdata->flags ^= IEEE80211_SDATA_ALLMULTI; |
f0706e82 | 434 | } |
4150c572 JB |
435 | |
436 | if (promisc != sdata_promisc) { | |
437 | if (dev->flags & IFF_PROMISC) | |
53918994 | 438 | atomic_inc(&local->iff_promiscs); |
4150c572 | 439 | else |
53918994 | 440 | atomic_dec(&local->iff_promiscs); |
13262ffd | 441 | sdata->flags ^= IEEE80211_SDATA_PROMISC; |
f0706e82 | 442 | } |
4150c572 JB |
443 | |
444 | dev_mc_sync(local->mdev, dev); | |
f0706e82 JB |
445 | } |
446 | ||
3b04ddde SH |
447 | static const struct header_ops ieee80211_header_ops = { |
448 | .create = eth_header, | |
449 | .parse = header_parse_80211, | |
450 | .rebuild = eth_rebuild_header, | |
451 | .cache = eth_header_cache, | |
452 | .cache_update = eth_header_cache_update, | |
453 | }; | |
454 | ||
f9d540ee | 455 | /* Must not be called for mdev */ |
b2c258fb | 456 | void ieee80211_if_setup(struct net_device *dev) |
f0706e82 | 457 | { |
b2c258fb JB |
458 | ether_setup(dev); |
459 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
460 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
461 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
462 | dev->change_mtu = ieee80211_change_mtu; | |
b2c258fb JB |
463 | dev->open = ieee80211_open; |
464 | dev->stop = ieee80211_stop; | |
b2c258fb JB |
465 | dev->destructor = ieee80211_if_free; |
466 | } | |
f0706e82 | 467 | |
b2c258fb JB |
468 | /* WDS specialties */ |
469 | ||
470 | int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) | |
471 | { | |
472 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
473 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
474 | struct sta_info *sta; | |
0795af57 | 475 | DECLARE_MAC_BUF(mac); |
b2c258fb JB |
476 | |
477 | if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) | |
478 | return 0; | |
479 | ||
480 | /* Create STA entry for the new peer */ | |
481 | sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); | |
482 | if (!sta) | |
483 | return -ENOMEM; | |
484 | sta_info_put(sta); | |
485 | ||
486 | /* Remove STA entry for the old peer */ | |
487 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
488 | if (sta) { | |
be8755e1 | 489 | sta_info_free(sta); |
b2c258fb | 490 | sta_info_put(sta); |
b2c258fb JB |
491 | } else { |
492 | printk(KERN_DEBUG "%s: could not find STA entry for WDS link " | |
0795af57 JP |
493 | "peer %s\n", |
494 | dev->name, print_mac(mac, sdata->u.wds.remote_addr)); | |
b2c258fb JB |
495 | } |
496 | ||
497 | /* Update WDS link data */ | |
498 | memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); | |
499 | ||
500 | return 0; | |
f0706e82 | 501 | } |
f0706e82 | 502 | |
b2c258fb JB |
503 | /* everything else */ |
504 | ||
b2c258fb JB |
505 | static int __ieee80211_if_config(struct net_device *dev, |
506 | struct sk_buff *beacon, | |
507 | struct ieee80211_tx_control *control) | |
508 | { | |
509 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
510 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
511 | struct ieee80211_if_conf conf; | |
b2c258fb JB |
512 | |
513 | if (!local->ops->config_interface || !netif_running(dev)) | |
f0706e82 | 514 | return 0; |
f0706e82 | 515 | |
b2c258fb | 516 | memset(&conf, 0, sizeof(conf)); |
51fb61e7 JB |
517 | conf.type = sdata->vif.type; |
518 | if (sdata->vif.type == IEEE80211_IF_TYPE_STA || | |
519 | sdata->vif.type == IEEE80211_IF_TYPE_IBSS) { | |
4150c572 | 520 | conf.bssid = sdata->u.sta.bssid; |
b2c258fb JB |
521 | conf.ssid = sdata->u.sta.ssid; |
522 | conf.ssid_len = sdata->u.sta.ssid_len; | |
51fb61e7 | 523 | } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) { |
b2c258fb JB |
524 | conf.ssid = sdata->u.ap.ssid; |
525 | conf.ssid_len = sdata->u.ap.ssid_len; | |
b2c258fb JB |
526 | conf.beacon = beacon; |
527 | conf.beacon_control = control; | |
f0706e82 | 528 | } |
b2c258fb | 529 | return local->ops->config_interface(local_to_hw(local), |
32bfd35d | 530 | &sdata->vif, &conf); |
f0706e82 JB |
531 | } |
532 | ||
b2c258fb JB |
533 | int ieee80211_if_config(struct net_device *dev) |
534 | { | |
535 | return __ieee80211_if_config(dev, NULL, NULL); | |
536 | } | |
f0706e82 | 537 | |
b2c258fb | 538 | int ieee80211_if_config_beacon(struct net_device *dev) |
f0706e82 | 539 | { |
f0706e82 | 540 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
b2c258fb | 541 | struct ieee80211_tx_control control; |
32bfd35d | 542 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
b2c258fb | 543 | struct sk_buff *skb; |
f0706e82 | 544 | |
b2c258fb | 545 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) |
f0706e82 | 546 | return 0; |
32bfd35d JB |
547 | skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif, |
548 | &control); | |
b2c258fb JB |
549 | if (!skb) |
550 | return -ENOMEM; | |
551 | return __ieee80211_if_config(dev, skb, &control); | |
552 | } | |
f0706e82 | 553 | |
b2c258fb JB |
554 | int ieee80211_hw_config(struct ieee80211_local *local) |
555 | { | |
556 | struct ieee80211_hw_mode *mode; | |
557 | struct ieee80211_channel *chan; | |
558 | int ret = 0; | |
f0706e82 | 559 | |
ece8eddd | 560 | if (local->sta_sw_scanning) { |
b2c258fb JB |
561 | chan = local->scan_channel; |
562 | mode = local->scan_hw_mode; | |
563 | } else { | |
564 | chan = local->oper_channel; | |
565 | mode = local->oper_hw_mode; | |
f0706e82 JB |
566 | } |
567 | ||
b2c258fb JB |
568 | local->hw.conf.channel = chan->chan; |
569 | local->hw.conf.channel_val = chan->val; | |
61609bc0 MB |
570 | if (!local->hw.conf.power_level) { |
571 | local->hw.conf.power_level = chan->power_level; | |
572 | } else { | |
573 | local->hw.conf.power_level = min(chan->power_level, | |
574 | local->hw.conf.power_level); | |
575 | } | |
b2c258fb JB |
576 | local->hw.conf.freq = chan->freq; |
577 | local->hw.conf.phymode = mode->mode; | |
578 | local->hw.conf.antenna_max = chan->antenna_max; | |
579 | local->hw.conf.chan = chan; | |
580 | local->hw.conf.mode = mode; | |
f0706e82 | 581 | |
b2c258fb JB |
582 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
583 | printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " | |
584 | "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, | |
585 | local->hw.conf.phymode); | |
586 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
587 | ||
f7c4daed | 588 | if (local->open_count) |
b2c258fb | 589 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
f0706e82 | 590 | |
b2c258fb JB |
591 | return ret; |
592 | } | |
f0706e82 | 593 | |
d3c990fb RR |
594 | /** |
595 | * ieee80211_hw_config_ht should be used only after legacy configuration | |
596 | * has been determined, as ht configuration depends upon the hardware's | |
597 | * HT abilities for a _specific_ band. | |
598 | */ | |
599 | int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht, | |
600 | struct ieee80211_ht_info *req_ht_cap, | |
601 | struct ieee80211_ht_bss_info *req_bss_cap) | |
602 | { | |
603 | struct ieee80211_conf *conf = &local->hw.conf; | |
604 | struct ieee80211_hw_mode *mode = conf->mode; | |
605 | int i; | |
606 | ||
607 | /* HT is not supported */ | |
608 | if (!mode->ht_info.ht_supported) { | |
609 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; | |
610 | return -EOPNOTSUPP; | |
611 | } | |
612 | ||
613 | /* disable HT */ | |
614 | if (!enable_ht) { | |
615 | conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE; | |
616 | } else { | |
617 | conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE; | |
618 | conf->ht_conf.cap = req_ht_cap->cap & mode->ht_info.cap; | |
619 | conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS); | |
620 | conf->ht_conf.cap |= | |
621 | mode->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS; | |
622 | conf->ht_bss_conf.primary_channel = | |
623 | req_bss_cap->primary_channel; | |
624 | conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap; | |
625 | conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode; | |
626 | for (i = 0; i < SUPP_MCS_SET_LEN; i++) | |
627 | conf->ht_conf.supp_mcs_set[i] = | |
628 | mode->ht_info.supp_mcs_set[i] & | |
629 | req_ht_cap->supp_mcs_set[i]; | |
630 | ||
631 | /* In STA mode, this gives us indication | |
632 | * to the AP's mode of operation */ | |
633 | conf->ht_conf.ht_supported = 1; | |
634 | conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor; | |
635 | conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density; | |
636 | } | |
637 | ||
638 | local->ops->conf_ht(local_to_hw(local), &local->hw.conf); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
471b3efd JB |
643 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
644 | u32 changed) | |
d9430a32 | 645 | { |
471b3efd JB |
646 | struct ieee80211_local *local = sdata->local; |
647 | ||
648 | if (!changed) | |
649 | return; | |
650 | ||
651 | if (local->ops->bss_info_changed) | |
652 | local->ops->bss_info_changed(local_to_hw(local), | |
653 | &sdata->vif, | |
654 | &sdata->bss_conf, | |
655 | changed); | |
d9430a32 DD |
656 | } |
657 | ||
658 | void ieee80211_reset_erp_info(struct net_device *dev) | |
659 | { | |
660 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
661 | ||
471b3efd JB |
662 | sdata->bss_conf.use_cts_prot = 0; |
663 | sdata->bss_conf.use_short_preamble = 0; | |
664 | ieee80211_bss_info_change_notify(sdata, | |
665 | BSS_CHANGED_ERP_CTS_PROT | | |
666 | BSS_CHANGED_ERP_PREAMBLE); | |
d9430a32 DD |
667 | } |
668 | ||
f0706e82 JB |
669 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
670 | struct sk_buff *skb, | |
671 | struct ieee80211_tx_status *status) | |
672 | { | |
673 | struct ieee80211_local *local = hw_to_local(hw); | |
674 | struct ieee80211_tx_status *saved; | |
675 | int tmp; | |
676 | ||
677 | skb->dev = local->mdev; | |
678 | saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); | |
679 | if (unlikely(!saved)) { | |
680 | if (net_ratelimit()) | |
681 | printk(KERN_WARNING "%s: Not enough memory, " | |
682 | "dropping tx status", skb->dev->name); | |
683 | /* should be dev_kfree_skb_irq, but due to this function being | |
684 | * named _irqsafe instead of just _irq we can't be sure that | |
685 | * people won't call it from non-irq contexts */ | |
686 | dev_kfree_skb_any(skb); | |
687 | return; | |
688 | } | |
689 | memcpy(saved, status, sizeof(struct ieee80211_tx_status)); | |
690 | /* copy pointer to saved status into skb->cb for use by tasklet */ | |
691 | memcpy(skb->cb, &saved, sizeof(saved)); | |
692 | ||
693 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
694 | skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? | |
695 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
696 | tmp = skb_queue_len(&local->skb_queue) + | |
697 | skb_queue_len(&local->skb_queue_unreliable); | |
698 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
699 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
700 | memcpy(&saved, skb->cb, sizeof(saved)); | |
701 | kfree(saved); | |
702 | dev_kfree_skb_irq(skb); | |
703 | tmp--; | |
704 | I802_DEBUG_INC(local->tx_status_drop); | |
705 | } | |
706 | tasklet_schedule(&local->tasklet); | |
707 | } | |
708 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
709 | ||
710 | static void ieee80211_tasklet_handler(unsigned long data) | |
711 | { | |
712 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
713 | struct sk_buff *skb; | |
714 | struct ieee80211_rx_status rx_status; | |
715 | struct ieee80211_tx_status *tx_status; | |
716 | ||
717 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
718 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
719 | switch (skb->pkt_type) { | |
720 | case IEEE80211_RX_MSG: | |
721 | /* status is in skb->cb */ | |
722 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
51fb61e7 | 723 | /* Clear skb->pkt_type in order to not confuse kernel |
f0706e82 JB |
724 | * netstack. */ |
725 | skb->pkt_type = 0; | |
726 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
727 | break; | |
728 | case IEEE80211_TX_STATUS_MSG: | |
729 | /* get pointer to saved status out of skb->cb */ | |
730 | memcpy(&tx_status, skb->cb, sizeof(tx_status)); | |
731 | skb->pkt_type = 0; | |
732 | ieee80211_tx_status(local_to_hw(local), | |
733 | skb, tx_status); | |
734 | kfree(tx_status); | |
735 | break; | |
736 | default: /* should never get here! */ | |
737 | printk(KERN_ERR "%s: Unknown message type (%d)\n", | |
dd1cd4c6 | 738 | wiphy_name(local->hw.wiphy), skb->pkt_type); |
f0706e82 JB |
739 | dev_kfree_skb(skb); |
740 | break; | |
741 | } | |
742 | } | |
743 | } | |
744 | ||
f0706e82 JB |
745 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
746 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
747 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
748 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
749 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
750 | struct ieee80211_key *key, | |
751 | struct sk_buff *skb, | |
752 | struct ieee80211_tx_control *control) | |
753 | { | |
754 | int hdrlen, iv_len, mic_len; | |
755 | struct ieee80211_tx_packet_data *pkt_data; | |
756 | ||
757 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
32bfd35d | 758 | pkt_data->ifindex = vif_to_sdata(control->vif)->dev->ifindex; |
e8bf9649 JS |
759 | pkt_data->flags = 0; |
760 | if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS) | |
761 | pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS; | |
762 | if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT) | |
763 | pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT; | |
764 | if (control->flags & IEEE80211_TXCTL_REQUEUE) | |
765 | pkt_data->flags |= IEEE80211_TXPD_REQUEUE; | |
678f5f71 JB |
766 | if (control->flags & IEEE80211_TXCTL_EAPOL_FRAME) |
767 | pkt_data->flags |= IEEE80211_TXPD_EAPOL_FRAME; | |
f0706e82 JB |
768 | pkt_data->queue = control->queue; |
769 | ||
770 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
771 | ||
772 | if (!key) | |
773 | goto no_key; | |
774 | ||
8f20fc24 | 775 | switch (key->conf.alg) { |
f0706e82 JB |
776 | case ALG_WEP: |
777 | iv_len = WEP_IV_LEN; | |
778 | mic_len = WEP_ICV_LEN; | |
779 | break; | |
780 | case ALG_TKIP: | |
781 | iv_len = TKIP_IV_LEN; | |
782 | mic_len = TKIP_ICV_LEN; | |
783 | break; | |
784 | case ALG_CCMP: | |
785 | iv_len = CCMP_HDR_LEN; | |
786 | mic_len = CCMP_MIC_LEN; | |
787 | break; | |
788 | default: | |
789 | goto no_key; | |
790 | } | |
791 | ||
8f20fc24 | 792 | if (skb->len >= mic_len && |
11a843b7 | 793 | !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
f0706e82 JB |
794 | skb_trim(skb, skb->len - mic_len); |
795 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
796 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
797 | skb_pull(skb, iv_len); | |
798 | } | |
799 | ||
800 | no_key: | |
801 | { | |
802 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
803 | u16 fc = le16_to_cpu(hdr->frame_control); | |
804 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
805 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
806 | hdr->frame_control = cpu_to_le16(fc); | |
807 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
808 | skb_pull(skb, 2); | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
f0706e82 JB |
813 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
814 | struct ieee80211_tx_status *status) | |
815 | { | |
816 | struct sk_buff *skb2; | |
817 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
818 | struct ieee80211_local *local = hw_to_local(hw); | |
819 | u16 frag, type; | |
b306f453 JB |
820 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
821 | struct ieee80211_sub_if_data *sdata; | |
822 | int monitors; | |
f0706e82 JB |
823 | |
824 | if (!status) { | |
825 | printk(KERN_ERR | |
826 | "%s: ieee80211_tx_status called with NULL status\n", | |
dd1cd4c6 | 827 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
828 | dev_kfree_skb(skb); |
829 | return; | |
830 | } | |
831 | ||
832 | if (status->excessive_retries) { | |
833 | struct sta_info *sta; | |
834 | sta = sta_info_get(local, hdr->addr1); | |
835 | if (sta) { | |
836 | if (sta->flags & WLAN_STA_PS) { | |
837 | /* The STA is in power save mode, so assume | |
838 | * that this TX packet failed because of that. | |
839 | */ | |
840 | status->excessive_retries = 0; | |
841 | status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; | |
842 | } | |
843 | sta_info_put(sta); | |
844 | } | |
845 | } | |
846 | ||
847 | if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { | |
848 | struct sta_info *sta; | |
849 | sta = sta_info_get(local, hdr->addr1); | |
850 | if (sta) { | |
851 | sta->tx_filtered_count++; | |
852 | ||
853 | /* Clear the TX filter mask for this STA when sending | |
854 | * the next packet. If the STA went to power save mode, | |
855 | * this will happen when it is waking up for the next | |
856 | * time. */ | |
857 | sta->clear_dst_mask = 1; | |
858 | ||
859 | /* TODO: Is the WLAN_STA_PS flag always set here or is | |
860 | * the race between RX and TX status causing some | |
861 | * packets to be filtered out before 80211.o gets an | |
862 | * update for PS status? This seems to be the case, so | |
863 | * no changes are likely to be needed. */ | |
864 | if (sta->flags & WLAN_STA_PS && | |
865 | skb_queue_len(&sta->tx_filtered) < | |
866 | STA_MAX_TX_BUFFER) { | |
867 | ieee80211_remove_tx_extra(local, sta->key, | |
868 | skb, | |
869 | &status->control); | |
870 | skb_queue_tail(&sta->tx_filtered, skb); | |
871 | } else if (!(sta->flags & WLAN_STA_PS) && | |
872 | !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { | |
873 | /* Software retry the packet once */ | |
874 | status->control.flags |= IEEE80211_TXCTL_REQUEUE; | |
875 | ieee80211_remove_tx_extra(local, sta->key, | |
876 | skb, | |
877 | &status->control); | |
878 | dev_queue_xmit(skb); | |
879 | } else { | |
880 | if (net_ratelimit()) { | |
881 | printk(KERN_DEBUG "%s: dropped TX " | |
882 | "filtered frame queue_len=%d " | |
883 | "PS=%d @%lu\n", | |
dd1cd4c6 | 884 | wiphy_name(local->hw.wiphy), |
f0706e82 JB |
885 | skb_queue_len( |
886 | &sta->tx_filtered), | |
887 | !!(sta->flags & WLAN_STA_PS), | |
888 | jiffies); | |
889 | } | |
890 | dev_kfree_skb(skb); | |
891 | } | |
892 | sta_info_put(sta); | |
893 | return; | |
894 | } | |
1abbe498 MN |
895 | } else |
896 | rate_control_tx_status(local->mdev, skb, status); | |
f0706e82 JB |
897 | |
898 | ieee80211_led_tx(local, 0); | |
899 | ||
900 | /* SNMP counters | |
901 | * Fragments are passed to low-level drivers as separate skbs, so these | |
902 | * are actually fragments, not frames. Update frame counters only for | |
903 | * the first fragment of the frame. */ | |
904 | ||
905 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
906 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
907 | ||
908 | if (status->flags & IEEE80211_TX_STATUS_ACK) { | |
909 | if (frag == 0) { | |
910 | local->dot11TransmittedFrameCount++; | |
911 | if (is_multicast_ether_addr(hdr->addr1)) | |
912 | local->dot11MulticastTransmittedFrameCount++; | |
913 | if (status->retry_count > 0) | |
914 | local->dot11RetryCount++; | |
915 | if (status->retry_count > 1) | |
916 | local->dot11MultipleRetryCount++; | |
917 | } | |
918 | ||
919 | /* This counter shall be incremented for an acknowledged MPDU | |
920 | * with an individual address in the address 1 field or an MPDU | |
921 | * with a multicast address in the address 1 field of type Data | |
922 | * or Management. */ | |
923 | if (!is_multicast_ether_addr(hdr->addr1) || | |
924 | type == IEEE80211_FTYPE_DATA || | |
925 | type == IEEE80211_FTYPE_MGMT) | |
926 | local->dot11TransmittedFragmentCount++; | |
927 | } else { | |
928 | if (frag == 0) | |
929 | local->dot11FailedCount++; | |
930 | } | |
931 | ||
b306f453 JB |
932 | /* this was a transmitted frame, but now we want to reuse it */ |
933 | skb_orphan(skb); | |
934 | ||
b306f453 | 935 | if (!local->monitors) { |
f0706e82 JB |
936 | dev_kfree_skb(skb); |
937 | return; | |
938 | } | |
939 | ||
b306f453 | 940 | /* send frame to monitor interfaces now */ |
f0706e82 | 941 | |
b306f453 JB |
942 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
943 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
944 | dev_kfree_skb(skb); |
945 | return; | |
946 | } | |
f0706e82 | 947 | |
b306f453 JB |
948 | rthdr = (struct ieee80211_tx_status_rtap_hdr*) |
949 | skb_push(skb, sizeof(*rthdr)); | |
950 | ||
951 | memset(rthdr, 0, sizeof(*rthdr)); | |
952 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
953 | rthdr->hdr.it_present = | |
954 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
955 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
956 | ||
957 | if (!(status->flags & IEEE80211_TX_STATUS_ACK) && | |
958 | !is_multicast_ether_addr(hdr->addr1)) | |
959 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
960 | ||
961 | if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) && | |
962 | (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) | |
963 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); | |
964 | else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
965 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); | |
966 | ||
967 | rthdr->data_retries = status->retry_count; | |
968 | ||
79010420 | 969 | rcu_read_lock(); |
b306f453 | 970 | monitors = local->monitors; |
79010420 | 971 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
b306f453 JB |
972 | /* |
973 | * Using the monitors counter is possibly racy, but | |
974 | * if the value is wrong we simply either clone the skb | |
975 | * once too much or forget sending it to one monitor iface | |
976 | * The latter case isn't nice but fixing the race is much | |
977 | * more complicated. | |
978 | */ | |
979 | if (!monitors || !skb) | |
980 | goto out; | |
981 | ||
51fb61e7 | 982 | if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) { |
b306f453 JB |
983 | if (!netif_running(sdata->dev)) |
984 | continue; | |
985 | monitors--; | |
986 | if (monitors) | |
79010420 | 987 | skb2 = skb_clone(skb, GFP_ATOMIC); |
b306f453 JB |
988 | else |
989 | skb2 = NULL; | |
990 | skb->dev = sdata->dev; | |
991 | /* XXX: is this sufficient for BPF? */ | |
992 | skb_set_mac_header(skb, 0); | |
993 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
994 | skb->pkt_type = PACKET_OTHERHOST; | |
995 | skb->protocol = htons(ETH_P_802_2); | |
996 | memset(skb->cb, 0, sizeof(skb->cb)); | |
997 | netif_rx(skb); | |
998 | skb = skb2; | |
b306f453 JB |
999 | } |
1000 | } | |
1001 | out: | |
79010420 | 1002 | rcu_read_unlock(); |
b306f453 JB |
1003 | if (skb) |
1004 | dev_kfree_skb(skb); | |
f0706e82 JB |
1005 | } |
1006 | EXPORT_SYMBOL(ieee80211_tx_status); | |
1007 | ||
f0706e82 JB |
1008 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
1009 | const struct ieee80211_ops *ops) | |
1010 | { | |
1011 | struct net_device *mdev; | |
1012 | struct ieee80211_local *local; | |
1013 | struct ieee80211_sub_if_data *sdata; | |
1014 | int priv_size; | |
1015 | struct wiphy *wiphy; | |
1016 | ||
1017 | /* Ensure 32-byte alignment of our private data and hw private data. | |
1018 | * We use the wiphy priv data for both our ieee80211_local and for | |
1019 | * the driver's private data | |
1020 | * | |
1021 | * In memory it'll be like this: | |
1022 | * | |
1023 | * +-------------------------+ | |
1024 | * | struct wiphy | | |
1025 | * +-------------------------+ | |
1026 | * | struct ieee80211_local | | |
1027 | * +-------------------------+ | |
1028 | * | driver's private data | | |
1029 | * +-------------------------+ | |
1030 | * | |
1031 | */ | |
1032 | priv_size = ((sizeof(struct ieee80211_local) + | |
1033 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
1034 | priv_data_len; | |
1035 | ||
1036 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
1037 | ||
1038 | if (!wiphy) | |
1039 | return NULL; | |
1040 | ||
1041 | wiphy->privid = mac80211_wiphy_privid; | |
1042 | ||
1043 | local = wiphy_priv(wiphy); | |
1044 | local->hw.wiphy = wiphy; | |
1045 | ||
1046 | local->hw.priv = (char *)local + | |
1047 | ((sizeof(struct ieee80211_local) + | |
1048 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
1049 | ||
4480f15c | 1050 | BUG_ON(!ops->tx); |
4150c572 JB |
1051 | BUG_ON(!ops->start); |
1052 | BUG_ON(!ops->stop); | |
4480f15c JB |
1053 | BUG_ON(!ops->config); |
1054 | BUG_ON(!ops->add_interface); | |
4150c572 JB |
1055 | BUG_ON(!ops->remove_interface); |
1056 | BUG_ON(!ops->configure_filter); | |
f0706e82 JB |
1057 | local->ops = ops; |
1058 | ||
1059 | /* for now, mdev needs sub_if_data :/ */ | |
1060 | mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
1061 | "wmaster%d", ether_setup); | |
1062 | if (!mdev) { | |
1063 | wiphy_free(wiphy); | |
1064 | return NULL; | |
1065 | } | |
1066 | ||
1067 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); | |
1068 | mdev->ieee80211_ptr = &sdata->wdev; | |
1069 | sdata->wdev.wiphy = wiphy; | |
1070 | ||
1071 | local->hw.queues = 1; /* default */ | |
1072 | ||
1073 | local->mdev = mdev; | |
1074 | local->rx_pre_handlers = ieee80211_rx_pre_handlers; | |
1075 | local->rx_handlers = ieee80211_rx_handlers; | |
1076 | local->tx_handlers = ieee80211_tx_handlers; | |
1077 | ||
1078 | local->bridge_packets = 1; | |
1079 | ||
1080 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
1081 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
1082 | local->short_retry_limit = 7; | |
1083 | local->long_retry_limit = 4; | |
1084 | local->hw.conf.radio_enabled = 1; | |
f0706e82 | 1085 | |
b708e610 | 1086 | local->enabled_modes = ~0; |
f0706e82 JB |
1087 | |
1088 | INIT_LIST_HEAD(&local->modes_list); | |
1089 | ||
79010420 | 1090 | INIT_LIST_HEAD(&local->interfaces); |
f0706e82 JB |
1091 | |
1092 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); | |
f0706e82 JB |
1093 | ieee80211_rx_bss_list_init(mdev); |
1094 | ||
1095 | sta_info_init(local); | |
1096 | ||
1097 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
1098 | mdev->open = ieee80211_master_open; | |
1099 | mdev->stop = ieee80211_master_stop; | |
1100 | mdev->type = ARPHRD_IEEE80211; | |
3b04ddde | 1101 | mdev->header_ops = &ieee80211_header_ops; |
4150c572 | 1102 | mdev->set_multicast_list = ieee80211_master_set_multicast_list; |
f0706e82 | 1103 | |
51fb61e7 | 1104 | sdata->vif.type = IEEE80211_IF_TYPE_AP; |
f0706e82 JB |
1105 | sdata->dev = mdev; |
1106 | sdata->local = local; | |
1107 | sdata->u.ap.force_unicast_rateidx = -1; | |
1108 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
1109 | ieee80211_if_sdata_init(sdata); | |
79010420 JB |
1110 | /* no RCU needed since we're still during init phase */ |
1111 | list_add_tail(&sdata->list, &local->interfaces); | |
f0706e82 JB |
1112 | |
1113 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, | |
1114 | (unsigned long)local); | |
1115 | tasklet_disable(&local->tx_pending_tasklet); | |
1116 | ||
1117 | tasklet_init(&local->tasklet, | |
1118 | ieee80211_tasklet_handler, | |
1119 | (unsigned long) local); | |
1120 | tasklet_disable(&local->tasklet); | |
1121 | ||
1122 | skb_queue_head_init(&local->skb_queue); | |
1123 | skb_queue_head_init(&local->skb_queue_unreliable); | |
1124 | ||
1125 | return local_to_hw(local); | |
1126 | } | |
1127 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
1128 | ||
1129 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
1130 | { | |
1131 | struct ieee80211_local *local = hw_to_local(hw); | |
1132 | const char *name; | |
1133 | int result; | |
1134 | ||
1135 | result = wiphy_register(local->hw.wiphy); | |
1136 | if (result < 0) | |
1137 | return result; | |
1138 | ||
1139 | name = wiphy_dev(local->hw.wiphy)->driver->name; | |
1140 | local->hw.workqueue = create_singlethread_workqueue(name); | |
1141 | if (!local->hw.workqueue) { | |
1142 | result = -ENOMEM; | |
1143 | goto fail_workqueue; | |
1144 | } | |
1145 | ||
b306f453 JB |
1146 | /* |
1147 | * The hardware needs headroom for sending the frame, | |
1148 | * and we need some headroom for passing the frame to monitor | |
1149 | * interfaces, but never both at the same time. | |
1150 | */ | |
33ccad35 JB |
1151 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
1152 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 1153 | |
e9f207f0 JB |
1154 | debugfs_hw_add(local); |
1155 | ||
f0706e82 JB |
1156 | local->hw.conf.beacon_int = 1000; |
1157 | ||
1158 | local->wstats_flags |= local->hw.max_rssi ? | |
1159 | IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; | |
1160 | local->wstats_flags |= local->hw.max_signal ? | |
1161 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; | |
1162 | local->wstats_flags |= local->hw.max_noise ? | |
1163 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; | |
1164 | if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) | |
1165 | local->wstats_flags |= IW_QUAL_DBM; | |
1166 | ||
1167 | result = sta_info_start(local); | |
1168 | if (result < 0) | |
1169 | goto fail_sta_info; | |
1170 | ||
1171 | rtnl_lock(); | |
1172 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
1173 | if (result < 0) | |
1174 | goto fail_dev; | |
1175 | ||
1176 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
1177 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
1178 | ||
1179 | result = register_netdevice(local->mdev); | |
1180 | if (result < 0) | |
1181 | goto fail_dev; | |
1182 | ||
e9f207f0 | 1183 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
5b2812e9 | 1184 | ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP); |
e9f207f0 | 1185 | |
830f9038 JB |
1186 | result = ieee80211_init_rate_ctrl_alg(local, |
1187 | hw->rate_control_algorithm); | |
f0706e82 JB |
1188 | if (result < 0) { |
1189 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
dd1cd4c6 | 1190 | "algorithm\n", wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1191 | goto fail_rate; |
1192 | } | |
1193 | ||
1194 | result = ieee80211_wep_init(local); | |
1195 | ||
1196 | if (result < 0) { | |
1197 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
dd1cd4c6 | 1198 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1199 | goto fail_wep; |
1200 | } | |
1201 | ||
1202 | ieee80211_install_qdisc(local->mdev); | |
1203 | ||
1204 | /* add one default STA interface */ | |
1205 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
1206 | IEEE80211_IF_TYPE_STA); | |
1207 | if (result) | |
1208 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
dd1cd4c6 | 1209 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1210 | |
1211 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
1212 | rtnl_unlock(); | |
1213 | ||
1214 | ieee80211_led_init(local); | |
1215 | ||
1216 | return 0; | |
1217 | ||
1218 | fail_wep: | |
1219 | rate_control_deinitialize(local); | |
1220 | fail_rate: | |
e9f207f0 | 1221 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 JB |
1222 | unregister_netdevice(local->mdev); |
1223 | fail_dev: | |
1224 | rtnl_unlock(); | |
1225 | sta_info_stop(local); | |
1226 | fail_sta_info: | |
e9f207f0 | 1227 | debugfs_hw_del(local); |
f0706e82 JB |
1228 | destroy_workqueue(local->hw.workqueue); |
1229 | fail_workqueue: | |
1230 | wiphy_unregister(local->hw.wiphy); | |
1231 | return result; | |
1232 | } | |
1233 | EXPORT_SYMBOL(ieee80211_register_hw); | |
1234 | ||
1235 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
1236 | struct ieee80211_hw_mode *mode) | |
1237 | { | |
1238 | struct ieee80211_local *local = hw_to_local(hw); | |
1239 | struct ieee80211_rate *rate; | |
1240 | int i; | |
1241 | ||
1242 | INIT_LIST_HEAD(&mode->list); | |
1243 | list_add_tail(&mode->list, &local->modes_list); | |
1244 | ||
1245 | local->hw_modes |= (1 << mode->mode); | |
1246 | for (i = 0; i < mode->num_rates; i++) { | |
1247 | rate = &(mode->rates[i]); | |
1248 | rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; | |
1249 | } | |
1250 | ieee80211_prepare_rates(local, mode); | |
1251 | ||
1252 | if (!local->oper_hw_mode) { | |
1253 | /* Default to this mode */ | |
1254 | local->hw.conf.phymode = mode->mode; | |
1255 | local->oper_hw_mode = local->scan_hw_mode = mode; | |
1256 | local->oper_channel = local->scan_channel = &mode->channels[0]; | |
1257 | local->hw.conf.mode = local->oper_hw_mode; | |
1258 | local->hw.conf.chan = local->oper_channel; | |
1259 | } | |
1260 | ||
1261 | if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) | |
fd8bacc9 | 1262 | ieee80211_set_default_regdomain(mode); |
f0706e82 JB |
1263 | |
1264 | return 0; | |
1265 | } | |
1266 | EXPORT_SYMBOL(ieee80211_register_hwmode); | |
1267 | ||
1268 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) | |
1269 | { | |
1270 | struct ieee80211_local *local = hw_to_local(hw); | |
1271 | struct ieee80211_sub_if_data *sdata, *tmp; | |
f0706e82 JB |
1272 | int i; |
1273 | ||
1274 | tasklet_kill(&local->tx_pending_tasklet); | |
1275 | tasklet_kill(&local->tasklet); | |
1276 | ||
1277 | rtnl_lock(); | |
1278 | ||
1279 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
1280 | ||
1281 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
f0706e82 | 1282 | |
79010420 JB |
1283 | /* |
1284 | * At this point, interface list manipulations are fine | |
1285 | * because the driver cannot be handing us frames any | |
1286 | * more and the tasklet is killed. | |
1287 | */ | |
5b2812e9 JB |
1288 | |
1289 | /* | |
1290 | * First, we remove all non-master interfaces. Do this because they | |
1291 | * may have bss pointer dependency on the master, and when we free | |
1292 | * the master these would be freed as well, breaking our list | |
1293 | * iteration completely. | |
1294 | */ | |
1295 | list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { | |
1296 | if (sdata->dev == local->mdev) | |
1297 | continue; | |
1298 | list_del(&sdata->list); | |
f0706e82 | 1299 | __ieee80211_if_del(local, sdata); |
5b2812e9 JB |
1300 | } |
1301 | ||
1302 | /* then, finally, remove the master interface */ | |
1303 | __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev)); | |
f0706e82 JB |
1304 | |
1305 | rtnl_unlock(); | |
1306 | ||
f0706e82 JB |
1307 | ieee80211_rx_bss_list_deinit(local->mdev); |
1308 | ieee80211_clear_tx_pending(local); | |
1309 | sta_info_stop(local); | |
1310 | rate_control_deinitialize(local); | |
e9f207f0 | 1311 | debugfs_hw_del(local); |
f0706e82 JB |
1312 | |
1313 | for (i = 0; i < NUM_IEEE80211_MODES; i++) { | |
1314 | kfree(local->supp_rates[i]); | |
1315 | kfree(local->basic_rates[i]); | |
1316 | } | |
1317 | ||
1318 | if (skb_queue_len(&local->skb_queue) | |
1319 | || skb_queue_len(&local->skb_queue_unreliable)) | |
1320 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
dd1cd4c6 | 1321 | wiphy_name(local->hw.wiphy)); |
f0706e82 JB |
1322 | skb_queue_purge(&local->skb_queue); |
1323 | skb_queue_purge(&local->skb_queue_unreliable); | |
1324 | ||
1325 | destroy_workqueue(local->hw.workqueue); | |
1326 | wiphy_unregister(local->hw.wiphy); | |
1327 | ieee80211_wep_free(local); | |
1328 | ieee80211_led_exit(local); | |
1329 | } | |
1330 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
1331 | ||
1332 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
1333 | { | |
1334 | struct ieee80211_local *local = hw_to_local(hw); | |
1335 | ||
1336 | ieee80211_if_free(local->mdev); | |
1337 | wiphy_free(local->hw.wiphy); | |
1338 | } | |
1339 | EXPORT_SYMBOL(ieee80211_free_hw); | |
1340 | ||
f0706e82 JB |
1341 | static int __init ieee80211_init(void) |
1342 | { | |
1343 | struct sk_buff *skb; | |
1344 | int ret; | |
1345 | ||
1346 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); | |
1347 | ||
4b475898 | 1348 | ret = rc80211_simple_init(); |
ac71c691 | 1349 | if (ret) |
3eadf5f4 | 1350 | goto out; |
ad018375 | 1351 | |
4b475898 | 1352 | ret = rc80211_pid_init(); |
ad018375 | 1353 | if (ret) |
3eadf5f4 | 1354 | goto out_cleanup_simple; |
ac71c691 | 1355 | |
f0706e82 JB |
1356 | ret = ieee80211_wme_register(); |
1357 | if (ret) { | |
1358 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
1359 | "initialize WME (err=%d)\n", ret); | |
3eadf5f4 | 1360 | goto out_cleanup_pid; |
f0706e82 JB |
1361 | } |
1362 | ||
e9f207f0 | 1363 | ieee80211_debugfs_netdev_init(); |
fd8bacc9 | 1364 | ieee80211_regdomain_init(); |
e9f207f0 | 1365 | |
f0706e82 | 1366 | return 0; |
ad018375 | 1367 | |
3eadf5f4 | 1368 | out_cleanup_pid: |
4b475898 | 1369 | rc80211_pid_exit(); |
3eadf5f4 JB |
1370 | out_cleanup_simple: |
1371 | rc80211_simple_exit(); | |
1372 | out: | |
ad018375 | 1373 | return ret; |
f0706e82 JB |
1374 | } |
1375 | ||
f0706e82 JB |
1376 | static void __exit ieee80211_exit(void) |
1377 | { | |
4b475898 JB |
1378 | rc80211_simple_exit(); |
1379 | rc80211_pid_exit(); | |
ac71c691 | 1380 | |
f0706e82 | 1381 | ieee80211_wme_unregister(); |
e9f207f0 | 1382 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
1383 | } |
1384 | ||
1385 | ||
ca9938fe | 1386 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
1387 | module_exit(ieee80211_exit); |
1388 | ||
1389 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
1390 | MODULE_LICENSE("GPL"); |