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f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright (c) 2006 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 | #include <linux/kernel.h> | |
11 | #include <linux/if_arp.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/rtnetlink.h> | |
14 | #include <net/mac80211.h> | |
15 | #include "ieee80211_i.h" | |
16 | #include "sta_info.h" | |
e9f207f0 | 17 | #include "debugfs_netdev.h" |
f0706e82 JB |
18 | |
19 | void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) | |
20 | { | |
21 | int i; | |
22 | ||
23 | /* Default values for sub-interface parameters */ | |
24 | sdata->drop_unencrypted = 0; | |
25 | sdata->eapol = 1; | |
26 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
27 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
28 | } | |
29 | ||
30 | static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) | |
31 | { | |
32 | int i; | |
33 | ||
34 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
35 | __skb_queue_purge(&sdata->fragments[i].skb_list); | |
36 | } | |
37 | } | |
38 | ||
39 | /* Must be called with rtnl lock held. */ | |
40 | int ieee80211_if_add(struct net_device *dev, const char *name, | |
41 | struct net_device **new_dev, int type) | |
42 | { | |
43 | struct net_device *ndev; | |
44 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
45 | struct ieee80211_sub_if_data *sdata = NULL; | |
46 | int ret; | |
47 | ||
48 | ASSERT_RTNL(); | |
49 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
50 | name, ieee80211_if_setup); | |
51 | if (!ndev) | |
52 | return -ENOMEM; | |
53 | ||
54 | ret = dev_alloc_name(ndev, ndev->name); | |
55 | if (ret < 0) | |
56 | goto fail; | |
57 | ||
58 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
59 | ndev->base_addr = dev->base_addr; | |
60 | ndev->irq = dev->irq; | |
61 | ndev->mem_start = dev->mem_start; | |
62 | ndev->mem_end = dev->mem_end; | |
63 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
64 | ||
65 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
66 | ndev->ieee80211_ptr = &sdata->wdev; | |
67 | sdata->wdev.wiphy = local->hw.wiphy; | |
68 | sdata->type = IEEE80211_IF_TYPE_AP; | |
69 | sdata->dev = ndev; | |
70 | sdata->local = local; | |
71 | ieee80211_if_sdata_init(sdata); | |
72 | ||
73 | ret = register_netdevice(ndev); | |
74 | if (ret) | |
75 | goto fail; | |
76 | ||
e9f207f0 | 77 | ieee80211_debugfs_add_netdev(sdata); |
f0706e82 JB |
78 | ieee80211_if_set_type(ndev, type); |
79 | ||
80 | write_lock_bh(&local->sub_if_lock); | |
81 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { | |
82 | write_unlock_bh(&local->sub_if_lock); | |
83 | __ieee80211_if_del(local, sdata); | |
84 | return -ENODEV; | |
85 | } | |
86 | list_add(&sdata->list, &local->sub_if_list); | |
87 | if (new_dev) | |
88 | *new_dev = ndev; | |
89 | write_unlock_bh(&local->sub_if_lock); | |
90 | ||
f0706e82 JB |
91 | return 0; |
92 | ||
93 | fail: | |
94 | free_netdev(ndev); | |
95 | return ret; | |
96 | } | |
97 | ||
98 | int ieee80211_if_add_mgmt(struct ieee80211_local *local) | |
99 | { | |
100 | struct net_device *ndev; | |
101 | struct ieee80211_sub_if_data *nsdata; | |
102 | int ret; | |
103 | ||
104 | ASSERT_RTNL(); | |
105 | ||
106 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d", | |
107 | ieee80211_if_mgmt_setup); | |
108 | if (!ndev) | |
109 | return -ENOMEM; | |
110 | ret = dev_alloc_name(ndev, ndev->name); | |
111 | if (ret < 0) | |
112 | goto fail; | |
113 | ||
114 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
115 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
116 | ||
117 | nsdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
118 | ndev->ieee80211_ptr = &nsdata->wdev; | |
119 | nsdata->wdev.wiphy = local->hw.wiphy; | |
120 | nsdata->type = IEEE80211_IF_TYPE_MGMT; | |
121 | nsdata->dev = ndev; | |
122 | nsdata->local = local; | |
123 | ieee80211_if_sdata_init(nsdata); | |
124 | ||
125 | ret = register_netdevice(ndev); | |
126 | if (ret) | |
127 | goto fail; | |
128 | ||
e9f207f0 JB |
129 | ieee80211_debugfs_add_netdev(nsdata); |
130 | ||
f0706e82 JB |
131 | if (local->open_count > 0) |
132 | dev_open(ndev); | |
133 | local->apdev = ndev; | |
134 | return 0; | |
135 | ||
136 | fail: | |
137 | free_netdev(ndev); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | void ieee80211_if_del_mgmt(struct ieee80211_local *local) | |
142 | { | |
143 | struct net_device *apdev; | |
144 | ||
145 | ASSERT_RTNL(); | |
146 | apdev = local->apdev; | |
e9f207f0 | 147 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev)); |
f0706e82 JB |
148 | local->apdev = NULL; |
149 | unregister_netdevice(apdev); | |
150 | } | |
151 | ||
152 | void ieee80211_if_set_type(struct net_device *dev, int type) | |
153 | { | |
154 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
e9f207f0 | 155 | int oldtype = sdata->type; |
f0706e82 | 156 | |
40f7cac9 JB |
157 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
158 | ||
f0706e82 JB |
159 | sdata->type = type; |
160 | switch (type) { | |
161 | case IEEE80211_IF_TYPE_WDS: | |
162 | sdata->bss = NULL; | |
163 | break; | |
164 | case IEEE80211_IF_TYPE_VLAN: | |
165 | break; | |
166 | case IEEE80211_IF_TYPE_AP: | |
167 | sdata->u.ap.dtim_period = 2; | |
168 | sdata->u.ap.force_unicast_rateidx = -1; | |
169 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
170 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
171 | sdata->bss = &sdata->u.ap; | |
172 | break; | |
173 | case IEEE80211_IF_TYPE_STA: | |
174 | case IEEE80211_IF_TYPE_IBSS: { | |
175 | struct ieee80211_sub_if_data *msdata; | |
176 | struct ieee80211_if_sta *ifsta; | |
177 | ||
178 | ifsta = &sdata->u.sta; | |
179 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
180 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
181 | (unsigned long) sdata); | |
182 | skb_queue_head_init(&ifsta->skb_queue); | |
183 | ||
184 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
185 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
186 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
d6f2da5b JS |
187 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | |
188 | IEEE80211_STA_WMM_ENABLED | | |
189 | IEEE80211_STA_AUTO_BSSID_SEL | | |
190 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
f0706e82 JB |
191 | |
192 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
193 | sdata->bss = &msdata->u.ap; | |
194 | break; | |
195 | } | |
196 | case IEEE80211_IF_TYPE_MNTR: | |
197 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
40f7cac9 | 198 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
f0706e82 JB |
199 | break; |
200 | default: | |
201 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", | |
202 | dev->name, __FUNCTION__, type); | |
203 | } | |
e9f207f0 | 204 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
f0706e82 JB |
205 | } |
206 | ||
207 | /* Must be called with rtnl lock held. */ | |
208 | void ieee80211_if_reinit(struct net_device *dev) | |
209 | { | |
210 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
211 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
212 | struct sta_info *sta; | |
213 | int i; | |
214 | ||
215 | ASSERT_RTNL(); | |
216 | ieee80211_if_sdata_deinit(sdata); | |
217 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
218 | if (!sdata->keys[i]) | |
219 | continue; | |
220 | #if 0 | |
221 | /* The interface is down at the moment, so there is not | |
222 | * really much point in disabling the keys at this point. */ | |
223 | memset(addr, 0xff, ETH_ALEN); | |
224 | if (local->ops->set_key) | |
225 | local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr, | |
8f20fc24 JB |
226 | local->keys[i], |
227 | local->default_wep_only); | |
f0706e82 JB |
228 | #endif |
229 | ieee80211_key_free(sdata->keys[i]); | |
230 | sdata->keys[i] = NULL; | |
231 | } | |
232 | ||
233 | switch (sdata->type) { | |
234 | case IEEE80211_IF_TYPE_AP: { | |
235 | /* Remove all virtual interfaces that use this BSS | |
236 | * as their sdata->bss */ | |
237 | struct ieee80211_sub_if_data *tsdata, *n; | |
238 | LIST_HEAD(tmp_list); | |
239 | ||
240 | write_lock_bh(&local->sub_if_lock); | |
241 | list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) { | |
242 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { | |
243 | printk(KERN_DEBUG "%s: removing virtual " | |
244 | "interface %s because its BSS interface" | |
245 | " is being removed\n", | |
246 | sdata->dev->name, tsdata->dev->name); | |
247 | list_move_tail(&tsdata->list, &tmp_list); | |
248 | } | |
249 | } | |
250 | write_unlock_bh(&local->sub_if_lock); | |
251 | ||
252 | list_for_each_entry_safe(tsdata, n, &tmp_list, list) | |
253 | __ieee80211_if_del(local, tsdata); | |
254 | ||
255 | kfree(sdata->u.ap.beacon_head); | |
256 | kfree(sdata->u.ap.beacon_tail); | |
257 | kfree(sdata->u.ap.generic_elem); | |
258 | ||
259 | if (dev != local->mdev) { | |
260 | struct sk_buff *skb; | |
261 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { | |
262 | local->total_ps_buffered--; | |
263 | dev_kfree_skb(skb); | |
264 | } | |
265 | } | |
266 | ||
267 | break; | |
268 | } | |
269 | case IEEE80211_IF_TYPE_WDS: | |
270 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
271 | if (sta) { | |
be8755e1 | 272 | sta_info_free(sta); |
f0706e82 | 273 | sta_info_put(sta); |
f0706e82 JB |
274 | } else { |
275 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
276 | printk(KERN_DEBUG "%s: Someone had deleted my STA " | |
277 | "entry for the WDS link\n", dev->name); | |
278 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
279 | } | |
280 | break; | |
281 | case IEEE80211_IF_TYPE_STA: | |
282 | case IEEE80211_IF_TYPE_IBSS: | |
283 | kfree(sdata->u.sta.extra_ie); | |
284 | sdata->u.sta.extra_ie = NULL; | |
285 | kfree(sdata->u.sta.assocreq_ies); | |
286 | sdata->u.sta.assocreq_ies = NULL; | |
287 | kfree(sdata->u.sta.assocresp_ies); | |
288 | sdata->u.sta.assocresp_ies = NULL; | |
289 | if (sdata->u.sta.probe_resp) { | |
290 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
291 | sdata->u.sta.probe_resp = NULL; | |
292 | } | |
293 | ||
294 | break; | |
295 | case IEEE80211_IF_TYPE_MNTR: | |
296 | dev->type = ARPHRD_ETHER; | |
297 | break; | |
298 | } | |
299 | ||
300 | /* remove all STAs that are bound to this virtual interface */ | |
301 | sta_info_flush(local, dev); | |
302 | ||
303 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
304 | ieee80211_if_sdata_init(sdata); | |
305 | } | |
306 | ||
307 | /* Must be called with rtnl lock held. */ | |
308 | void __ieee80211_if_del(struct ieee80211_local *local, | |
309 | struct ieee80211_sub_if_data *sdata) | |
310 | { | |
311 | struct net_device *dev = sdata->dev; | |
312 | ||
e9f207f0 | 313 | ieee80211_debugfs_remove_netdev(sdata); |
f0706e82 JB |
314 | unregister_netdevice(dev); |
315 | /* Except master interface, the net_device will be freed by | |
316 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
317 | } | |
318 | ||
319 | /* Must be called with rtnl lock held. */ | |
320 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
321 | { | |
322 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
323 | struct ieee80211_sub_if_data *sdata, *n; | |
324 | ||
325 | ASSERT_RTNL(); | |
326 | ||
327 | write_lock_bh(&local->sub_if_lock); | |
328 | list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) { | |
329 | if ((sdata->type == id || id == -1) && | |
330 | strcmp(name, sdata->dev->name) == 0 && | |
331 | sdata->dev != local->mdev) { | |
332 | list_del(&sdata->list); | |
333 | write_unlock_bh(&local->sub_if_lock); | |
334 | __ieee80211_if_del(local, sdata); | |
f0706e82 JB |
335 | return 0; |
336 | } | |
337 | } | |
338 | write_unlock_bh(&local->sub_if_lock); | |
339 | return -ENODEV; | |
340 | } | |
341 | ||
342 | void ieee80211_if_free(struct net_device *dev) | |
343 | { | |
344 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
345 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
346 | ||
347 | /* local->apdev must be NULL when freeing management interface */ | |
348 | BUG_ON(dev == local->apdev); | |
349 | ieee80211_if_sdata_deinit(sdata); | |
350 | free_netdev(dev); | |
351 | } |