blob: 8532a5ccdd1ee35003482b7e4a194a5529ee68bd [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
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"
Jiri Bence9f207f2007-05-05 11:46:38 -070017#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070018
19void 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
30static 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. */
40int 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
Jiri Bence9f207f2007-05-05 11:46:38 -070077 ieee80211_debugfs_add_netdev(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -070078 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
91 ieee80211_update_default_wep_only(local);
92
93 return 0;
94
95fail:
96 free_netdev(ndev);
97 return ret;
98}
99
100int ieee80211_if_add_mgmt(struct ieee80211_local *local)
101{
102 struct net_device *ndev;
103 struct ieee80211_sub_if_data *nsdata;
104 int ret;
105
106 ASSERT_RTNL();
107
108 ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d",
109 ieee80211_if_mgmt_setup);
110 if (!ndev)
111 return -ENOMEM;
112 ret = dev_alloc_name(ndev, ndev->name);
113 if (ret < 0)
114 goto fail;
115
116 memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
117 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
118
119 nsdata = IEEE80211_DEV_TO_SUB_IF(ndev);
120 ndev->ieee80211_ptr = &nsdata->wdev;
121 nsdata->wdev.wiphy = local->hw.wiphy;
122 nsdata->type = IEEE80211_IF_TYPE_MGMT;
123 nsdata->dev = ndev;
124 nsdata->local = local;
125 ieee80211_if_sdata_init(nsdata);
126
127 ret = register_netdevice(ndev);
128 if (ret)
129 goto fail;
130
Jiri Bence9f207f2007-05-05 11:46:38 -0700131 ieee80211_debugfs_add_netdev(nsdata);
132
Jiri Bencf0706e82007-05-05 11:45:53 -0700133 if (local->open_count > 0)
134 dev_open(ndev);
135 local->apdev = ndev;
136 return 0;
137
138fail:
139 free_netdev(ndev);
140 return ret;
141}
142
143void ieee80211_if_del_mgmt(struct ieee80211_local *local)
144{
145 struct net_device *apdev;
146
147 ASSERT_RTNL();
148 apdev = local->apdev;
Jiri Bence9f207f2007-05-05 11:46:38 -0700149 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev));
Jiri Bencf0706e82007-05-05 11:45:53 -0700150 local->apdev = NULL;
151 unregister_netdevice(apdev);
152}
153
154void ieee80211_if_set_type(struct net_device *dev, int type)
155{
156 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
157 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Jiri Bence9f207f2007-05-05 11:46:38 -0700158 int oldtype = sdata->type;
Jiri Bencf0706e82007-05-05 11:45:53 -0700159
Johannes Berg40f7cac2007-07-10 19:32:08 +0200160 dev->hard_start_xmit = ieee80211_subif_start_xmit;
161
Jiri Bencf0706e82007-05-05 11:45:53 -0700162 sdata->type = type;
163 switch (type) {
164 case IEEE80211_IF_TYPE_WDS:
165 sdata->bss = NULL;
166 break;
167 case IEEE80211_IF_TYPE_VLAN:
168 break;
169 case IEEE80211_IF_TYPE_AP:
170 sdata->u.ap.dtim_period = 2;
171 sdata->u.ap.force_unicast_rateidx = -1;
172 sdata->u.ap.max_ratectrl_rateidx = -1;
173 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
174 sdata->bss = &sdata->u.ap;
175 break;
176 case IEEE80211_IF_TYPE_STA:
177 case IEEE80211_IF_TYPE_IBSS: {
178 struct ieee80211_sub_if_data *msdata;
179 struct ieee80211_if_sta *ifsta;
180
181 ifsta = &sdata->u.sta;
182 INIT_WORK(&ifsta->work, ieee80211_sta_work);
183 setup_timer(&ifsta->timer, ieee80211_sta_timer,
184 (unsigned long) sdata);
185 skb_queue_head_init(&ifsta->skb_queue);
186
187 ifsta->capab = WLAN_CAPABILITY_ESS;
188 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
189 IEEE80211_AUTH_ALG_SHARED_KEY;
190 ifsta->create_ibss = 1;
191 ifsta->wmm_enabled = 1;
192 ifsta->auto_channel_sel = 1;
193 ifsta->auto_bssid_sel = 1;
194
195 msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
196 sdata->bss = &msdata->u.ap;
197 break;
198 }
199 case IEEE80211_IF_TYPE_MNTR:
200 dev->type = ARPHRD_IEEE80211_RADIOTAP;
Johannes Berg40f7cac2007-07-10 19:32:08 +0200201 dev->hard_start_xmit = ieee80211_monitor_start_xmit;
Jiri Bencf0706e82007-05-05 11:45:53 -0700202 break;
203 default:
204 printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
205 dev->name, __FUNCTION__, type);
206 }
Jiri Bence9f207f2007-05-05 11:46:38 -0700207 ieee80211_debugfs_change_if_type(sdata, oldtype);
Jiri Bencf0706e82007-05-05 11:45:53 -0700208 ieee80211_update_default_wep_only(local);
209}
210
211/* Must be called with rtnl lock held. */
212void ieee80211_if_reinit(struct net_device *dev)
213{
214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
215 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
216 struct sta_info *sta;
217 int i;
218
219 ASSERT_RTNL();
220 ieee80211_if_sdata_deinit(sdata);
221 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
222 if (!sdata->keys[i])
223 continue;
224#if 0
225 /* The interface is down at the moment, so there is not
226 * really much point in disabling the keys at this point. */
227 memset(addr, 0xff, ETH_ALEN);
228 if (local->ops->set_key)
229 local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr,
230 local->keys[i], 0);
231#endif
232 ieee80211_key_free(sdata->keys[i]);
233 sdata->keys[i] = NULL;
234 }
235
236 switch (sdata->type) {
237 case IEEE80211_IF_TYPE_AP: {
238 /* Remove all virtual interfaces that use this BSS
239 * as their sdata->bss */
240 struct ieee80211_sub_if_data *tsdata, *n;
241 LIST_HEAD(tmp_list);
242
243 write_lock_bh(&local->sub_if_lock);
244 list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) {
245 if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
246 printk(KERN_DEBUG "%s: removing virtual "
247 "interface %s because its BSS interface"
248 " is being removed\n",
249 sdata->dev->name, tsdata->dev->name);
250 list_move_tail(&tsdata->list, &tmp_list);
251 }
252 }
253 write_unlock_bh(&local->sub_if_lock);
254
255 list_for_each_entry_safe(tsdata, n, &tmp_list, list)
256 __ieee80211_if_del(local, tsdata);
257
258 kfree(sdata->u.ap.beacon_head);
259 kfree(sdata->u.ap.beacon_tail);
260 kfree(sdata->u.ap.generic_elem);
261
262 if (dev != local->mdev) {
263 struct sk_buff *skb;
264 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
265 local->total_ps_buffered--;
266 dev_kfree_skb(skb);
267 }
268 }
269
270 break;
271 }
272 case IEEE80211_IF_TYPE_WDS:
273 sta = sta_info_get(local, sdata->u.wds.remote_addr);
274 if (sta) {
275 sta_info_put(sta);
276 sta_info_free(sta, 0);
277 } else {
278#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
279 printk(KERN_DEBUG "%s: Someone had deleted my STA "
280 "entry for the WDS link\n", dev->name);
281#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
282 }
283 break;
284 case IEEE80211_IF_TYPE_STA:
285 case IEEE80211_IF_TYPE_IBSS:
286 kfree(sdata->u.sta.extra_ie);
287 sdata->u.sta.extra_ie = NULL;
288 kfree(sdata->u.sta.assocreq_ies);
289 sdata->u.sta.assocreq_ies = NULL;
290 kfree(sdata->u.sta.assocresp_ies);
291 sdata->u.sta.assocresp_ies = NULL;
292 if (sdata->u.sta.probe_resp) {
293 dev_kfree_skb(sdata->u.sta.probe_resp);
294 sdata->u.sta.probe_resp = NULL;
295 }
296
297 break;
298 case IEEE80211_IF_TYPE_MNTR:
299 dev->type = ARPHRD_ETHER;
300 break;
301 }
302
303 /* remove all STAs that are bound to this virtual interface */
304 sta_info_flush(local, dev);
305
306 memset(&sdata->u, 0, sizeof(sdata->u));
307 ieee80211_if_sdata_init(sdata);
308}
309
310/* Must be called with rtnl lock held. */
311void __ieee80211_if_del(struct ieee80211_local *local,
312 struct ieee80211_sub_if_data *sdata)
313{
314 struct net_device *dev = sdata->dev;
315
Jiri Bence9f207f2007-05-05 11:46:38 -0700316 ieee80211_debugfs_remove_netdev(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -0700317 unregister_netdevice(dev);
318 /* Except master interface, the net_device will be freed by
319 * net_device->destructor (i. e. ieee80211_if_free). */
320}
321
322/* Must be called with rtnl lock held. */
323int ieee80211_if_remove(struct net_device *dev, const char *name, int id)
324{
325 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
326 struct ieee80211_sub_if_data *sdata, *n;
327
328 ASSERT_RTNL();
329
330 write_lock_bh(&local->sub_if_lock);
331 list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
332 if ((sdata->type == id || id == -1) &&
333 strcmp(name, sdata->dev->name) == 0 &&
334 sdata->dev != local->mdev) {
335 list_del(&sdata->list);
336 write_unlock_bh(&local->sub_if_lock);
337 __ieee80211_if_del(local, sdata);
338 ieee80211_update_default_wep_only(local);
339 return 0;
340 }
341 }
342 write_unlock_bh(&local->sub_if_lock);
343 return -ENODEV;
344}
345
346void ieee80211_if_free(struct net_device *dev)
347{
348 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
350
351 /* local->apdev must be NULL when freeing management interface */
352 BUG_ON(dev == local->apdev);
353 ieee80211_if_sdata_deinit(sdata);
354 free_netdev(dev);
355}