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 (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" |
ee385855 | 18 | #include "mesh.h" |
f0706e82 JB |
19 | |
20 | void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata) | |
21 | { | |
22 | int i; | |
23 | ||
24 | /* Default values for sub-interface parameters */ | |
25 | sdata->drop_unencrypted = 0; | |
f0706e82 JB |
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 | ||
988c0f72 | 36 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
f0706e82 | 37 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
f0706e82 JB |
38 | } |
39 | ||
40 | /* Must be called with rtnl lock held. */ | |
41 | int ieee80211_if_add(struct net_device *dev, const char *name, | |
ee385855 LCC |
42 | struct net_device **new_dev, int type, |
43 | struct vif_params *params) | |
f0706e82 JB |
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(); | |
32bfd35d | 51 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
f0706e82 JB |
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; | |
51fb61e7 | 70 | sdata->vif.type = IEEE80211_IF_TYPE_AP; |
f0706e82 JB |
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 | ||
902acc78 JB |
82 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
83 | params && params->mesh_id_len) | |
84 | ieee80211_if_sta_set_mesh_id(&sdata->u.sta, | |
85 | params->mesh_id_len, | |
86 | params->mesh_id); | |
ee385855 | 87 | |
79010420 | 88 | /* we're under RTNL so all this is fine */ |
f0706e82 | 89 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { |
f0706e82 JB |
90 | __ieee80211_if_del(local, sdata); |
91 | return -ENODEV; | |
92 | } | |
79010420 JB |
93 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
94 | ||
f0706e82 JB |
95 | if (new_dev) |
96 | *new_dev = ndev; | |
f0706e82 | 97 | |
f0706e82 JB |
98 | return 0; |
99 | ||
100 | fail: | |
101 | free_netdev(ndev); | |
102 | return ret; | |
103 | } | |
104 | ||
f0706e82 JB |
105 | void ieee80211_if_set_type(struct net_device *dev, int type) |
106 | { | |
107 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
51fb61e7 | 108 | int oldtype = sdata->vif.type; |
f0706e82 | 109 | |
5b2812e9 JB |
110 | /* |
111 | * We need to call this function on the master interface | |
112 | * which already has a hard_start_xmit routine assigned | |
113 | * which must not be changed. | |
114 | */ | |
0654ff05 | 115 | if (dev != sdata->local->mdev) |
5b2812e9 JB |
116 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
117 | ||
118 | /* | |
119 | * Called even when register_netdevice fails, it would | |
120 | * oops if assigned before initialising the rest. | |
121 | */ | |
122 | dev->uninit = ieee80211_if_reinit; | |
123 | ||
124 | /* most have no BSS pointer */ | |
125 | sdata->bss = NULL; | |
51fb61e7 | 126 | sdata->vif.type = type; |
5b2812e9 | 127 | |
8318d78a JB |
128 | sdata->basic_rates = 0; |
129 | ||
f0706e82 JB |
130 | switch (type) { |
131 | case IEEE80211_IF_TYPE_WDS: | |
5b2812e9 | 132 | /* nothing special */ |
f0706e82 JB |
133 | break; |
134 | case IEEE80211_IF_TYPE_VLAN: | |
0ec3ca44 | 135 | sdata->u.vlan.ap = NULL; |
f0706e82 JB |
136 | break; |
137 | case IEEE80211_IF_TYPE_AP: | |
f0706e82 JB |
138 | sdata->u.ap.force_unicast_rateidx = -1; |
139 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
140 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
141 | sdata->bss = &sdata->u.ap; | |
0ec3ca44 | 142 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
f0706e82 | 143 | break; |
ee385855 | 144 | case IEEE80211_IF_TYPE_MESH_POINT: |
f0706e82 JB |
145 | case IEEE80211_IF_TYPE_STA: |
146 | case IEEE80211_IF_TYPE_IBSS: { | |
147 | struct ieee80211_sub_if_data *msdata; | |
148 | struct ieee80211_if_sta *ifsta; | |
149 | ||
150 | ifsta = &sdata->u.sta; | |
151 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
152 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
153 | (unsigned long) sdata); | |
154 | skb_queue_head_init(&ifsta->skb_queue); | |
155 | ||
156 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
157 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
158 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
d6f2da5b JS |
159 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | |
160 | IEEE80211_STA_WMM_ENABLED | | |
161 | IEEE80211_STA_AUTO_BSSID_SEL | | |
162 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
f0706e82 JB |
163 | |
164 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
165 | sdata->bss = &msdata->u.ap; | |
ee385855 | 166 | |
902acc78 JB |
167 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
168 | ieee80211_mesh_init_sdata(sdata); | |
f0706e82 JB |
169 | break; |
170 | } | |
171 | case IEEE80211_IF_TYPE_MNTR: | |
172 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
40f7cac9 | 173 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
8cc9a739 MW |
174 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
175 | MONITOR_FLAG_OTHER_BSS; | |
f0706e82 JB |
176 | break; |
177 | default: | |
178 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", | |
0dc47877 | 179 | dev->name, __func__, type); |
f0706e82 | 180 | } |
e9f207f0 | 181 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
f0706e82 JB |
182 | } |
183 | ||
184 | /* Must be called with rtnl lock held. */ | |
185 | void ieee80211_if_reinit(struct net_device *dev) | |
186 | { | |
187 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
188 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5b2812e9 | 189 | struct sk_buff *skb; |
44213b5e | 190 | int flushed; |
f0706e82 JB |
191 | |
192 | ASSERT_RTNL(); | |
11a843b7 JB |
193 | |
194 | ieee80211_free_keys(sdata); | |
195 | ||
f0706e82 | 196 | ieee80211_if_sdata_deinit(sdata); |
f0706e82 | 197 | |
902acc78 JB |
198 | /* Need to handle mesh specially to allow eliding the function call */ |
199 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
200 | mesh_rmc_free(dev); | |
201 | ||
51fb61e7 | 202 | switch (sdata->vif.type) { |
a2897552 JB |
203 | case IEEE80211_IF_TYPE_INVALID: |
204 | /* cannot happen */ | |
205 | WARN_ON(1); | |
206 | break; | |
f0706e82 JB |
207 | case IEEE80211_IF_TYPE_AP: { |
208 | /* Remove all virtual interfaces that use this BSS | |
209 | * as their sdata->bss */ | |
210 | struct ieee80211_sub_if_data *tsdata, *n; | |
e6a5ddf2 | 211 | struct beacon_data *beacon; |
f0706e82 | 212 | |
79010420 | 213 | list_for_each_entry_safe(tsdata, n, &local->interfaces, list) { |
f0706e82 JB |
214 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { |
215 | printk(KERN_DEBUG "%s: removing virtual " | |
216 | "interface %s because its BSS interface" | |
217 | " is being removed\n", | |
218 | sdata->dev->name, tsdata->dev->name); | |
79010420 JB |
219 | list_del_rcu(&tsdata->list); |
220 | /* | |
221 | * We have lots of time and can afford | |
222 | * to sync for each interface | |
223 | */ | |
224 | synchronize_rcu(); | |
225 | __ieee80211_if_del(local, tsdata); | |
f0706e82 JB |
226 | } |
227 | } | |
f0706e82 | 228 | |
e6a5ddf2 JB |
229 | beacon = sdata->u.ap.beacon; |
230 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
231 | synchronize_rcu(); | |
232 | kfree(beacon); | |
f0706e82 | 233 | |
5b2812e9 JB |
234 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
235 | local->total_ps_buffered--; | |
236 | dev_kfree_skb(skb); | |
f0706e82 JB |
237 | } |
238 | ||
239 | break; | |
240 | } | |
241 | case IEEE80211_IF_TYPE_WDS: | |
44213b5e | 242 | /* nothing to do */ |
f0706e82 | 243 | break; |
6032f934 | 244 | case IEEE80211_IF_TYPE_MESH_POINT: |
f0706e82 JB |
245 | case IEEE80211_IF_TYPE_STA: |
246 | case IEEE80211_IF_TYPE_IBSS: | |
247 | kfree(sdata->u.sta.extra_ie); | |
248 | sdata->u.sta.extra_ie = NULL; | |
249 | kfree(sdata->u.sta.assocreq_ies); | |
250 | sdata->u.sta.assocreq_ies = NULL; | |
251 | kfree(sdata->u.sta.assocresp_ies); | |
252 | sdata->u.sta.assocresp_ies = NULL; | |
253 | if (sdata->u.sta.probe_resp) { | |
254 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
255 | sdata->u.sta.probe_resp = NULL; | |
256 | } | |
257 | ||
258 | break; | |
259 | case IEEE80211_IF_TYPE_MNTR: | |
260 | dev->type = ARPHRD_ETHER; | |
261 | break; | |
0ec3ca44 JB |
262 | case IEEE80211_IF_TYPE_VLAN: |
263 | sdata->u.vlan.ap = NULL; | |
264 | break; | |
f0706e82 JB |
265 | } |
266 | ||
44213b5e JB |
267 | flushed = sta_info_flush(local, sdata); |
268 | WARN_ON(flushed); | |
f0706e82 JB |
269 | |
270 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
271 | ieee80211_if_sdata_init(sdata); | |
272 | } | |
273 | ||
274 | /* Must be called with rtnl lock held. */ | |
275 | void __ieee80211_if_del(struct ieee80211_local *local, | |
276 | struct ieee80211_sub_if_data *sdata) | |
277 | { | |
278 | struct net_device *dev = sdata->dev; | |
279 | ||
e9f207f0 | 280 | ieee80211_debugfs_remove_netdev(sdata); |
f0706e82 JB |
281 | unregister_netdevice(dev); |
282 | /* Except master interface, the net_device will be freed by | |
283 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
284 | } | |
285 | ||
286 | /* Must be called with rtnl lock held. */ | |
287 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
288 | { | |
289 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
290 | struct ieee80211_sub_if_data *sdata, *n; | |
291 | ||
292 | ASSERT_RTNL(); | |
293 | ||
79010420 | 294 | list_for_each_entry_safe(sdata, n, &local->interfaces, list) { |
51fb61e7 | 295 | if ((sdata->vif.type == id || id == -1) && |
f0706e82 JB |
296 | strcmp(name, sdata->dev->name) == 0 && |
297 | sdata->dev != local->mdev) { | |
79010420 JB |
298 | list_del_rcu(&sdata->list); |
299 | synchronize_rcu(); | |
f0706e82 | 300 | __ieee80211_if_del(local, sdata); |
f0706e82 JB |
301 | return 0; |
302 | } | |
303 | } | |
f0706e82 JB |
304 | return -ENODEV; |
305 | } | |
306 | ||
307 | void ieee80211_if_free(struct net_device *dev) | |
308 | { | |
f0706e82 JB |
309 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
310 | ||
f0706e82 JB |
311 | ieee80211_if_sdata_deinit(sdata); |
312 | free_netdev(dev); | |
313 | } |