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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" | |
17 | ||
18 | void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) | |
19 | { | |
20 | int i; | |
21 | ||
22 | /* Default values for sub-interface parameters */ | |
23 | sdata->drop_unencrypted = 0; | |
24 | sdata->eapol = 1; | |
25 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) | |
26 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
27 | } | |
28 | ||
29 | static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) | |
30 | { | |
31 | int i; | |
32 | ||
33 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
34 | __skb_queue_purge(&sdata->fragments[i].skb_list); | |
35 | } | |
36 | } | |
37 | ||
38 | /* Must be called with rtnl lock held. */ | |
39 | int ieee80211_if_add(struct net_device *dev, const char *name, | |
40 | struct net_device **new_dev, int type) | |
41 | { | |
42 | struct net_device *ndev; | |
43 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
44 | struct ieee80211_sub_if_data *sdata = NULL; | |
45 | int ret; | |
46 | ||
47 | ASSERT_RTNL(); | |
48 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
49 | name, ieee80211_if_setup); | |
50 | if (!ndev) | |
51 | return -ENOMEM; | |
52 | ||
53 | ret = dev_alloc_name(ndev, ndev->name); | |
54 | if (ret < 0) | |
55 | goto fail; | |
56 | ||
57 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
58 | ndev->base_addr = dev->base_addr; | |
59 | ndev->irq = dev->irq; | |
60 | ndev->mem_start = dev->mem_start; | |
61 | ndev->mem_end = dev->mem_end; | |
62 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
63 | ||
64 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
65 | ndev->ieee80211_ptr = &sdata->wdev; | |
66 | sdata->wdev.wiphy = local->hw.wiphy; | |
67 | sdata->type = IEEE80211_IF_TYPE_AP; | |
68 | sdata->dev = ndev; | |
69 | sdata->local = local; | |
70 | ieee80211_if_sdata_init(sdata); | |
71 | ||
72 | ret = register_netdevice(ndev); | |
73 | if (ret) | |
74 | goto fail; | |
75 | ||
76 | ieee80211_if_set_type(ndev, type); | |
77 | ||
78 | write_lock_bh(&local->sub_if_lock); | |
79 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { | |
80 | write_unlock_bh(&local->sub_if_lock); | |
81 | __ieee80211_if_del(local, sdata); | |
82 | return -ENODEV; | |
83 | } | |
84 | list_add(&sdata->list, &local->sub_if_list); | |
85 | if (new_dev) | |
86 | *new_dev = ndev; | |
87 | write_unlock_bh(&local->sub_if_lock); | |
88 | ||
89 | ieee80211_update_default_wep_only(local); | |
90 | ||
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 | ||
129 | if (local->open_count > 0) | |
130 | dev_open(ndev); | |
131 | local->apdev = ndev; | |
132 | return 0; | |
133 | ||
134 | fail: | |
135 | free_netdev(ndev); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | void ieee80211_if_del_mgmt(struct ieee80211_local *local) | |
140 | { | |
141 | struct net_device *apdev; | |
142 | ||
143 | ASSERT_RTNL(); | |
144 | apdev = local->apdev; | |
145 | local->apdev = NULL; | |
146 | unregister_netdevice(apdev); | |
147 | } | |
148 | ||
149 | void ieee80211_if_set_type(struct net_device *dev, int type) | |
150 | { | |
151 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
152 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
153 | ||
154 | sdata->type = type; | |
155 | switch (type) { | |
156 | case IEEE80211_IF_TYPE_WDS: | |
157 | sdata->bss = NULL; | |
158 | break; | |
159 | case IEEE80211_IF_TYPE_VLAN: | |
160 | break; | |
161 | case IEEE80211_IF_TYPE_AP: | |
162 | sdata->u.ap.dtim_period = 2; | |
163 | sdata->u.ap.force_unicast_rateidx = -1; | |
164 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
165 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
166 | sdata->bss = &sdata->u.ap; | |
167 | break; | |
168 | case IEEE80211_IF_TYPE_STA: | |
169 | case IEEE80211_IF_TYPE_IBSS: { | |
170 | struct ieee80211_sub_if_data *msdata; | |
171 | struct ieee80211_if_sta *ifsta; | |
172 | ||
173 | ifsta = &sdata->u.sta; | |
174 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
175 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
176 | (unsigned long) sdata); | |
177 | skb_queue_head_init(&ifsta->skb_queue); | |
178 | ||
179 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
180 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
181 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
182 | ifsta->create_ibss = 1; | |
183 | ifsta->wmm_enabled = 1; | |
184 | ifsta->auto_channel_sel = 1; | |
185 | ifsta->auto_bssid_sel = 1; | |
186 | ||
187 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
188 | sdata->bss = &msdata->u.ap; | |
189 | break; | |
190 | } | |
191 | case IEEE80211_IF_TYPE_MNTR: | |
192 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
193 | break; | |
194 | default: | |
195 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", | |
196 | dev->name, __FUNCTION__, type); | |
197 | } | |
198 | ieee80211_update_default_wep_only(local); | |
199 | } | |
200 | ||
201 | /* Must be called with rtnl lock held. */ | |
202 | void ieee80211_if_reinit(struct net_device *dev) | |
203 | { | |
204 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
205 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
206 | struct sta_info *sta; | |
207 | int i; | |
208 | ||
209 | ASSERT_RTNL(); | |
210 | ieee80211_if_sdata_deinit(sdata); | |
211 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
212 | if (!sdata->keys[i]) | |
213 | continue; | |
214 | #if 0 | |
215 | /* The interface is down at the moment, so there is not | |
216 | * really much point in disabling the keys at this point. */ | |
217 | memset(addr, 0xff, ETH_ALEN); | |
218 | if (local->ops->set_key) | |
219 | local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr, | |
220 | local->keys[i], 0); | |
221 | #endif | |
222 | ieee80211_key_free(sdata->keys[i]); | |
223 | sdata->keys[i] = NULL; | |
224 | } | |
225 | ||
226 | switch (sdata->type) { | |
227 | case IEEE80211_IF_TYPE_AP: { | |
228 | /* Remove all virtual interfaces that use this BSS | |
229 | * as their sdata->bss */ | |
230 | struct ieee80211_sub_if_data *tsdata, *n; | |
231 | LIST_HEAD(tmp_list); | |
232 | ||
233 | write_lock_bh(&local->sub_if_lock); | |
234 | list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) { | |
235 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { | |
236 | printk(KERN_DEBUG "%s: removing virtual " | |
237 | "interface %s because its BSS interface" | |
238 | " is being removed\n", | |
239 | sdata->dev->name, tsdata->dev->name); | |
240 | list_move_tail(&tsdata->list, &tmp_list); | |
241 | } | |
242 | } | |
243 | write_unlock_bh(&local->sub_if_lock); | |
244 | ||
245 | list_for_each_entry_safe(tsdata, n, &tmp_list, list) | |
246 | __ieee80211_if_del(local, tsdata); | |
247 | ||
248 | kfree(sdata->u.ap.beacon_head); | |
249 | kfree(sdata->u.ap.beacon_tail); | |
250 | kfree(sdata->u.ap.generic_elem); | |
251 | ||
252 | if (dev != local->mdev) { | |
253 | struct sk_buff *skb; | |
254 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { | |
255 | local->total_ps_buffered--; | |
256 | dev_kfree_skb(skb); | |
257 | } | |
258 | } | |
259 | ||
260 | break; | |
261 | } | |
262 | case IEEE80211_IF_TYPE_WDS: | |
263 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
264 | if (sta) { | |
265 | sta_info_put(sta); | |
266 | sta_info_free(sta, 0); | |
267 | } else { | |
268 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
269 | printk(KERN_DEBUG "%s: Someone had deleted my STA " | |
270 | "entry for the WDS link\n", dev->name); | |
271 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
272 | } | |
273 | break; | |
274 | case IEEE80211_IF_TYPE_STA: | |
275 | case IEEE80211_IF_TYPE_IBSS: | |
276 | kfree(sdata->u.sta.extra_ie); | |
277 | sdata->u.sta.extra_ie = NULL; | |
278 | kfree(sdata->u.sta.assocreq_ies); | |
279 | sdata->u.sta.assocreq_ies = NULL; | |
280 | kfree(sdata->u.sta.assocresp_ies); | |
281 | sdata->u.sta.assocresp_ies = NULL; | |
282 | if (sdata->u.sta.probe_resp) { | |
283 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
284 | sdata->u.sta.probe_resp = NULL; | |
285 | } | |
286 | ||
287 | break; | |
288 | case IEEE80211_IF_TYPE_MNTR: | |
289 | dev->type = ARPHRD_ETHER; | |
290 | break; | |
291 | } | |
292 | ||
293 | /* remove all STAs that are bound to this virtual interface */ | |
294 | sta_info_flush(local, dev); | |
295 | ||
296 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
297 | ieee80211_if_sdata_init(sdata); | |
298 | } | |
299 | ||
300 | /* Must be called with rtnl lock held. */ | |
301 | void __ieee80211_if_del(struct ieee80211_local *local, | |
302 | struct ieee80211_sub_if_data *sdata) | |
303 | { | |
304 | struct net_device *dev = sdata->dev; | |
305 | ||
306 | unregister_netdevice(dev); | |
307 | /* Except master interface, the net_device will be freed by | |
308 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
309 | } | |
310 | ||
311 | /* Must be called with rtnl lock held. */ | |
312 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
313 | { | |
314 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
315 | struct ieee80211_sub_if_data *sdata, *n; | |
316 | ||
317 | ASSERT_RTNL(); | |
318 | ||
319 | write_lock_bh(&local->sub_if_lock); | |
320 | list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) { | |
321 | if ((sdata->type == id || id == -1) && | |
322 | strcmp(name, sdata->dev->name) == 0 && | |
323 | sdata->dev != local->mdev) { | |
324 | list_del(&sdata->list); | |
325 | write_unlock_bh(&local->sub_if_lock); | |
326 | __ieee80211_if_del(local, sdata); | |
327 | ieee80211_update_default_wep_only(local); | |
328 | return 0; | |
329 | } | |
330 | } | |
331 | write_unlock_bh(&local->sub_if_lock); | |
332 | return -ENODEV; | |
333 | } | |
334 | ||
335 | void ieee80211_if_free(struct net_device *dev) | |
336 | { | |
337 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
338 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
339 | ||
340 | /* local->apdev must be NULL when freeing management interface */ | |
341 | BUG_ON(dev == local->apdev); | |
342 | ieee80211_if_sdata_deinit(sdata); | |
343 | free_netdev(dev); | |
344 | } |