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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); | |
11a843b7 JB |
28 | |
29 | INIT_LIST_HEAD(&sdata->key_list); | |
f0706e82 JB |
30 | } |
31 | ||
32 | static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) | |
33 | { | |
34 | int i; | |
35 | ||
36 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
37 | __skb_queue_purge(&sdata->fragments[i].skb_list); | |
38 | } | |
39 | } | |
40 | ||
41 | /* Must be called with rtnl lock held. */ | |
42 | int ieee80211_if_add(struct net_device *dev, const char *name, | |
43 | struct net_device **new_dev, int type) | |
44 | { | |
45 | struct net_device *ndev; | |
46 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47 | struct ieee80211_sub_if_data *sdata = NULL; | |
48 | int ret; | |
49 | ||
50 | ASSERT_RTNL(); | |
51 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
52 | name, ieee80211_if_setup); | |
53 | if (!ndev) | |
54 | return -ENOMEM; | |
55 | ||
56 | ret = dev_alloc_name(ndev, ndev->name); | |
57 | if (ret < 0) | |
58 | goto fail; | |
59 | ||
60 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
61 | ndev->base_addr = dev->base_addr; | |
62 | ndev->irq = dev->irq; | |
63 | ndev->mem_start = dev->mem_start; | |
64 | ndev->mem_end = dev->mem_end; | |
65 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
66 | ||
67 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
68 | ndev->ieee80211_ptr = &sdata->wdev; | |
69 | sdata->wdev.wiphy = local->hw.wiphy; | |
70 | sdata->type = IEEE80211_IF_TYPE_AP; | |
71 | sdata->dev = ndev; | |
72 | sdata->local = local; | |
73 | ieee80211_if_sdata_init(sdata); | |
74 | ||
75 | ret = register_netdevice(ndev); | |
76 | if (ret) | |
77 | goto fail; | |
78 | ||
e9f207f0 | 79 | ieee80211_debugfs_add_netdev(sdata); |
f0706e82 JB |
80 | ieee80211_if_set_type(ndev, type); |
81 | ||
79010420 | 82 | /* we're under RTNL so all this is fine */ |
f0706e82 | 83 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { |
f0706e82 JB |
84 | __ieee80211_if_del(local, sdata); |
85 | return -ENODEV; | |
86 | } | |
79010420 JB |
87 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
88 | ||
f0706e82 JB |
89 | if (new_dev) |
90 | *new_dev = ndev; | |
f0706e82 | 91 | |
f0706e82 JB |
92 | return 0; |
93 | ||
94 | fail: | |
95 | free_netdev(ndev); | |
96 | return ret; | |
97 | } | |
98 | ||
99 | int ieee80211_if_add_mgmt(struct ieee80211_local *local) | |
100 | { | |
101 | struct net_device *ndev; | |
102 | struct ieee80211_sub_if_data *nsdata; | |
103 | int ret; | |
104 | ||
105 | ASSERT_RTNL(); | |
106 | ||
107 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d", | |
108 | ieee80211_if_mgmt_setup); | |
109 | if (!ndev) | |
110 | return -ENOMEM; | |
111 | ret = dev_alloc_name(ndev, ndev->name); | |
112 | if (ret < 0) | |
113 | goto fail; | |
114 | ||
115 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
116 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
117 | ||
118 | nsdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
119 | ndev->ieee80211_ptr = &nsdata->wdev; | |
120 | nsdata->wdev.wiphy = local->hw.wiphy; | |
121 | nsdata->type = IEEE80211_IF_TYPE_MGMT; | |
122 | nsdata->dev = ndev; | |
123 | nsdata->local = local; | |
124 | ieee80211_if_sdata_init(nsdata); | |
125 | ||
126 | ret = register_netdevice(ndev); | |
127 | if (ret) | |
128 | goto fail; | |
129 | ||
5b2812e9 JB |
130 | /* |
131 | * Called even when register_netdevice fails, it would | |
132 | * oops if assigned before initialising the rest. | |
133 | */ | |
134 | ndev->uninit = ieee80211_if_reinit; | |
135 | ||
e9f207f0 JB |
136 | ieee80211_debugfs_add_netdev(nsdata); |
137 | ||
f0706e82 JB |
138 | if (local->open_count > 0) |
139 | dev_open(ndev); | |
140 | local->apdev = ndev; | |
141 | return 0; | |
142 | ||
143 | fail: | |
144 | free_netdev(ndev); | |
145 | return ret; | |
146 | } | |
147 | ||
148 | void ieee80211_if_del_mgmt(struct ieee80211_local *local) | |
149 | { | |
150 | struct net_device *apdev; | |
151 | ||
152 | ASSERT_RTNL(); | |
153 | apdev = local->apdev; | |
e9f207f0 | 154 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev)); |
f0706e82 JB |
155 | local->apdev = NULL; |
156 | unregister_netdevice(apdev); | |
157 | } | |
158 | ||
159 | void ieee80211_if_set_type(struct net_device *dev, int type) | |
160 | { | |
161 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
e9f207f0 | 162 | int oldtype = sdata->type; |
f0706e82 | 163 | |
5b2812e9 JB |
164 | /* |
165 | * We need to call this function on the master interface | |
166 | * which already has a hard_start_xmit routine assigned | |
167 | * which must not be changed. | |
168 | */ | |
169 | if (!dev->hard_start_xmit) | |
170 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
171 | ||
172 | /* | |
173 | * Called even when register_netdevice fails, it would | |
174 | * oops if assigned before initialising the rest. | |
175 | */ | |
176 | dev->uninit = ieee80211_if_reinit; | |
177 | ||
178 | /* most have no BSS pointer */ | |
179 | sdata->bss = NULL; | |
f0706e82 | 180 | sdata->type = type; |
5b2812e9 | 181 | |
f0706e82 JB |
182 | switch (type) { |
183 | case IEEE80211_IF_TYPE_WDS: | |
5b2812e9 | 184 | /* nothing special */ |
f0706e82 JB |
185 | break; |
186 | case IEEE80211_IF_TYPE_VLAN: | |
0ec3ca44 | 187 | sdata->u.vlan.ap = NULL; |
f0706e82 JB |
188 | break; |
189 | case IEEE80211_IF_TYPE_AP: | |
190 | sdata->u.ap.dtim_period = 2; | |
191 | sdata->u.ap.force_unicast_rateidx = -1; | |
192 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
193 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
194 | sdata->bss = &sdata->u.ap; | |
0ec3ca44 | 195 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
f0706e82 JB |
196 | break; |
197 | case IEEE80211_IF_TYPE_STA: | |
198 | case IEEE80211_IF_TYPE_IBSS: { | |
199 | struct ieee80211_sub_if_data *msdata; | |
200 | struct ieee80211_if_sta *ifsta; | |
201 | ||
202 | ifsta = &sdata->u.sta; | |
203 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
204 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
205 | (unsigned long) sdata); | |
206 | skb_queue_head_init(&ifsta->skb_queue); | |
207 | ||
208 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
209 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
210 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
d6f2da5b JS |
211 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | |
212 | IEEE80211_STA_WMM_ENABLED | | |
213 | IEEE80211_STA_AUTO_BSSID_SEL | | |
214 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
f0706e82 JB |
215 | |
216 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
217 | sdata->bss = &msdata->u.ap; | |
218 | break; | |
219 | } | |
220 | case IEEE80211_IF_TYPE_MNTR: | |
221 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
40f7cac9 | 222 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
f0706e82 JB |
223 | break; |
224 | default: | |
225 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", | |
226 | dev->name, __FUNCTION__, type); | |
227 | } | |
e9f207f0 | 228 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
f0706e82 JB |
229 | } |
230 | ||
231 | /* Must be called with rtnl lock held. */ | |
232 | void ieee80211_if_reinit(struct net_device *dev) | |
233 | { | |
234 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
235 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
236 | struct sta_info *sta; | |
5b2812e9 | 237 | struct sk_buff *skb; |
f0706e82 JB |
238 | |
239 | ASSERT_RTNL(); | |
11a843b7 JB |
240 | |
241 | ieee80211_free_keys(sdata); | |
242 | ||
f0706e82 | 243 | ieee80211_if_sdata_deinit(sdata); |
f0706e82 JB |
244 | |
245 | switch (sdata->type) { | |
fb1c1cd6 JB |
246 | case IEEE80211_IF_TYPE_MGMT: |
247 | /* nothing to do */ | |
248 | break; | |
f0706e82 JB |
249 | case IEEE80211_IF_TYPE_AP: { |
250 | /* Remove all virtual interfaces that use this BSS | |
251 | * as their sdata->bss */ | |
252 | struct ieee80211_sub_if_data *tsdata, *n; | |
f0706e82 | 253 | |
79010420 | 254 | list_for_each_entry_safe(tsdata, n, &local->interfaces, list) { |
f0706e82 JB |
255 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { |
256 | printk(KERN_DEBUG "%s: removing virtual " | |
257 | "interface %s because its BSS interface" | |
258 | " is being removed\n", | |
259 | sdata->dev->name, tsdata->dev->name); | |
79010420 JB |
260 | list_del_rcu(&tsdata->list); |
261 | /* | |
262 | * We have lots of time and can afford | |
263 | * to sync for each interface | |
264 | */ | |
265 | synchronize_rcu(); | |
266 | __ieee80211_if_del(local, tsdata); | |
f0706e82 JB |
267 | } |
268 | } | |
f0706e82 JB |
269 | |
270 | kfree(sdata->u.ap.beacon_head); | |
271 | kfree(sdata->u.ap.beacon_tail); | |
f0706e82 | 272 | |
5b2812e9 JB |
273 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
274 | local->total_ps_buffered--; | |
275 | dev_kfree_skb(skb); | |
f0706e82 JB |
276 | } |
277 | ||
278 | break; | |
279 | } | |
280 | case IEEE80211_IF_TYPE_WDS: | |
281 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
282 | if (sta) { | |
be8755e1 | 283 | sta_info_free(sta); |
f0706e82 | 284 | sta_info_put(sta); |
f0706e82 JB |
285 | } else { |
286 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
287 | printk(KERN_DEBUG "%s: Someone had deleted my STA " | |
288 | "entry for the WDS link\n", dev->name); | |
289 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
290 | } | |
291 | break; | |
292 | case IEEE80211_IF_TYPE_STA: | |
293 | case IEEE80211_IF_TYPE_IBSS: | |
294 | kfree(sdata->u.sta.extra_ie); | |
295 | sdata->u.sta.extra_ie = NULL; | |
296 | kfree(sdata->u.sta.assocreq_ies); | |
297 | sdata->u.sta.assocreq_ies = NULL; | |
298 | kfree(sdata->u.sta.assocresp_ies); | |
299 | sdata->u.sta.assocresp_ies = NULL; | |
300 | if (sdata->u.sta.probe_resp) { | |
301 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
302 | sdata->u.sta.probe_resp = NULL; | |
303 | } | |
304 | ||
305 | break; | |
306 | case IEEE80211_IF_TYPE_MNTR: | |
307 | dev->type = ARPHRD_ETHER; | |
308 | break; | |
0ec3ca44 JB |
309 | case IEEE80211_IF_TYPE_VLAN: |
310 | sdata->u.vlan.ap = NULL; | |
311 | break; | |
f0706e82 JB |
312 | } |
313 | ||
314 | /* remove all STAs that are bound to this virtual interface */ | |
315 | sta_info_flush(local, dev); | |
316 | ||
317 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
318 | ieee80211_if_sdata_init(sdata); | |
319 | } | |
320 | ||
321 | /* Must be called with rtnl lock held. */ | |
322 | void __ieee80211_if_del(struct ieee80211_local *local, | |
323 | struct ieee80211_sub_if_data *sdata) | |
324 | { | |
325 | struct net_device *dev = sdata->dev; | |
326 | ||
e9f207f0 | 327 | ieee80211_debugfs_remove_netdev(sdata); |
f0706e82 JB |
328 | unregister_netdevice(dev); |
329 | /* Except master interface, the net_device will be freed by | |
330 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
331 | } | |
332 | ||
333 | /* Must be called with rtnl lock held. */ | |
334 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
335 | { | |
336 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
337 | struct ieee80211_sub_if_data *sdata, *n; | |
338 | ||
339 | ASSERT_RTNL(); | |
340 | ||
79010420 | 341 | list_for_each_entry_safe(sdata, n, &local->interfaces, list) { |
f0706e82 JB |
342 | if ((sdata->type == id || id == -1) && |
343 | strcmp(name, sdata->dev->name) == 0 && | |
344 | sdata->dev != local->mdev) { | |
79010420 JB |
345 | list_del_rcu(&sdata->list); |
346 | synchronize_rcu(); | |
f0706e82 | 347 | __ieee80211_if_del(local, sdata); |
f0706e82 JB |
348 | return 0; |
349 | } | |
350 | } | |
f0706e82 JB |
351 | return -ENODEV; |
352 | } | |
353 | ||
354 | void ieee80211_if_free(struct net_device *dev) | |
355 | { | |
356 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
357 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
358 | ||
359 | /* local->apdev must be NULL when freeing management interface */ | |
360 | BUG_ON(dev == local->apdev); | |
361 | ieee80211_if_sdata_deinit(sdata); | |
362 | free_netdev(dev); | |
363 | } |