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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 | ||
f3994ece JB |
56 | ndev->needed_headroom = local->tx_headroom + |
57 | 4*6 /* four MAC addresses */ | |
58 | + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */ | |
59 | + 6 /* mesh */ | |
60 | + 8 /* rfc1042/bridge tunnel */ | |
61 | - ETH_HLEN /* ethernet hard_header_len */ | |
62 | + IEEE80211_ENCRYPT_HEADROOM; | |
63 | ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM; | |
64 | ||
f0706e82 JB |
65 | ret = dev_alloc_name(ndev, ndev->name); |
66 | if (ret < 0) | |
67 | goto fail; | |
68 | ||
69 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
70 | ndev->base_addr = dev->base_addr; | |
71 | ndev->irq = dev->irq; | |
72 | ndev->mem_start = dev->mem_start; | |
73 | ndev->mem_end = dev->mem_end; | |
74 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
75 | ||
76 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
77 | ndev->ieee80211_ptr = &sdata->wdev; | |
78 | sdata->wdev.wiphy = local->hw.wiphy; | |
51fb61e7 | 79 | sdata->vif.type = IEEE80211_IF_TYPE_AP; |
f0706e82 JB |
80 | sdata->dev = ndev; |
81 | sdata->local = local; | |
82 | ieee80211_if_sdata_init(sdata); | |
83 | ||
84 | ret = register_netdevice(ndev); | |
85 | if (ret) | |
86 | goto fail; | |
87 | ||
e9f207f0 | 88 | ieee80211_debugfs_add_netdev(sdata); |
f0706e82 JB |
89 | ieee80211_if_set_type(ndev, type); |
90 | ||
902acc78 JB |
91 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
92 | params && params->mesh_id_len) | |
93 | ieee80211_if_sta_set_mesh_id(&sdata->u.sta, | |
94 | params->mesh_id_len, | |
95 | params->mesh_id); | |
ee385855 | 96 | |
79010420 | 97 | /* we're under RTNL so all this is fine */ |
f0706e82 | 98 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { |
f0706e82 JB |
99 | __ieee80211_if_del(local, sdata); |
100 | return -ENODEV; | |
101 | } | |
79010420 JB |
102 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
103 | ||
f0706e82 JB |
104 | if (new_dev) |
105 | *new_dev = ndev; | |
f0706e82 | 106 | |
f0706e82 JB |
107 | return 0; |
108 | ||
109 | fail: | |
110 | free_netdev(ndev); | |
111 | return ret; | |
112 | } | |
113 | ||
f0706e82 JB |
114 | void ieee80211_if_set_type(struct net_device *dev, int type) |
115 | { | |
116 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
51fb61e7 | 117 | int oldtype = sdata->vif.type; |
f0706e82 | 118 | |
5b2812e9 JB |
119 | /* |
120 | * We need to call this function on the master interface | |
121 | * which already has a hard_start_xmit routine assigned | |
122 | * which must not be changed. | |
123 | */ | |
0654ff05 | 124 | if (dev != sdata->local->mdev) |
5b2812e9 JB |
125 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
126 | ||
127 | /* | |
128 | * Called even when register_netdevice fails, it would | |
129 | * oops if assigned before initialising the rest. | |
130 | */ | |
131 | dev->uninit = ieee80211_if_reinit; | |
132 | ||
133 | /* most have no BSS pointer */ | |
134 | sdata->bss = NULL; | |
51fb61e7 | 135 | sdata->vif.type = type; |
5b2812e9 | 136 | |
8318d78a JB |
137 | sdata->basic_rates = 0; |
138 | ||
f0706e82 JB |
139 | switch (type) { |
140 | case IEEE80211_IF_TYPE_WDS: | |
5b2812e9 | 141 | /* nothing special */ |
f0706e82 JB |
142 | break; |
143 | case IEEE80211_IF_TYPE_VLAN: | |
0ec3ca44 | 144 | sdata->u.vlan.ap = NULL; |
f0706e82 JB |
145 | break; |
146 | case IEEE80211_IF_TYPE_AP: | |
f0706e82 JB |
147 | sdata->u.ap.force_unicast_rateidx = -1; |
148 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
149 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
150 | sdata->bss = &sdata->u.ap; | |
0ec3ca44 | 151 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
f0706e82 | 152 | break; |
ee385855 | 153 | case IEEE80211_IF_TYPE_MESH_POINT: |
f0706e82 JB |
154 | case IEEE80211_IF_TYPE_STA: |
155 | case IEEE80211_IF_TYPE_IBSS: { | |
156 | struct ieee80211_sub_if_data *msdata; | |
157 | struct ieee80211_if_sta *ifsta; | |
158 | ||
159 | ifsta = &sdata->u.sta; | |
160 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
161 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
162 | (unsigned long) sdata); | |
163 | skb_queue_head_init(&ifsta->skb_queue); | |
164 | ||
165 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
166 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
167 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
d6f2da5b | 168 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | |
d6f2da5b JS |
169 | IEEE80211_STA_AUTO_BSSID_SEL | |
170 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
e2530083 | 171 | if (ieee80211_num_regular_queues(&sdata->local->hw) >= 4) |
3434fbd3 | 172 | ifsta->flags |= IEEE80211_STA_WMM_ENABLED; |
f0706e82 JB |
173 | |
174 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
175 | sdata->bss = &msdata->u.ap; | |
ee385855 | 176 | |
902acc78 JB |
177 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
178 | ieee80211_mesh_init_sdata(sdata); | |
f0706e82 JB |
179 | break; |
180 | } | |
181 | case IEEE80211_IF_TYPE_MNTR: | |
182 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
40f7cac9 | 183 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
8cc9a739 MW |
184 | sdata->u.mntr_flags = MONITOR_FLAG_CONTROL | |
185 | MONITOR_FLAG_OTHER_BSS; | |
f0706e82 | 186 | break; |
f4ea83dd JB |
187 | case IEEE80211_IF_TYPE_INVALID: |
188 | BUG(); | |
189 | break; | |
f0706e82 | 190 | } |
e9f207f0 | 191 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
f0706e82 JB |
192 | } |
193 | ||
194 | /* Must be called with rtnl lock held. */ | |
195 | void ieee80211_if_reinit(struct net_device *dev) | |
196 | { | |
197 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
198 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5b2812e9 | 199 | struct sk_buff *skb; |
44213b5e | 200 | int flushed; |
f0706e82 JB |
201 | |
202 | ASSERT_RTNL(); | |
11a843b7 JB |
203 | |
204 | ieee80211_free_keys(sdata); | |
205 | ||
f0706e82 | 206 | ieee80211_if_sdata_deinit(sdata); |
f0706e82 | 207 | |
902acc78 JB |
208 | /* Need to handle mesh specially to allow eliding the function call */ |
209 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
210 | mesh_rmc_free(dev); | |
211 | ||
51fb61e7 | 212 | switch (sdata->vif.type) { |
a2897552 JB |
213 | case IEEE80211_IF_TYPE_INVALID: |
214 | /* cannot happen */ | |
215 | WARN_ON(1); | |
216 | break; | |
f0706e82 JB |
217 | case IEEE80211_IF_TYPE_AP: { |
218 | /* Remove all virtual interfaces that use this BSS | |
219 | * as their sdata->bss */ | |
220 | struct ieee80211_sub_if_data *tsdata, *n; | |
e6a5ddf2 | 221 | struct beacon_data *beacon; |
f0706e82 | 222 | |
79010420 | 223 | list_for_each_entry_safe(tsdata, n, &local->interfaces, list) { |
f0706e82 JB |
224 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { |
225 | printk(KERN_DEBUG "%s: removing virtual " | |
226 | "interface %s because its BSS interface" | |
227 | " is being removed\n", | |
228 | sdata->dev->name, tsdata->dev->name); | |
79010420 JB |
229 | list_del_rcu(&tsdata->list); |
230 | /* | |
231 | * We have lots of time and can afford | |
232 | * to sync for each interface | |
233 | */ | |
234 | synchronize_rcu(); | |
235 | __ieee80211_if_del(local, tsdata); | |
f0706e82 JB |
236 | } |
237 | } | |
f0706e82 | 238 | |
e6a5ddf2 JB |
239 | beacon = sdata->u.ap.beacon; |
240 | rcu_assign_pointer(sdata->u.ap.beacon, NULL); | |
241 | synchronize_rcu(); | |
242 | kfree(beacon); | |
f0706e82 | 243 | |
5b2812e9 JB |
244 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
245 | local->total_ps_buffered--; | |
246 | dev_kfree_skb(skb); | |
f0706e82 JB |
247 | } |
248 | ||
249 | break; | |
250 | } | |
251 | case IEEE80211_IF_TYPE_WDS: | |
44213b5e | 252 | /* nothing to do */ |
f0706e82 | 253 | break; |
6032f934 | 254 | case IEEE80211_IF_TYPE_MESH_POINT: |
f0706e82 JB |
255 | case IEEE80211_IF_TYPE_STA: |
256 | case IEEE80211_IF_TYPE_IBSS: | |
257 | kfree(sdata->u.sta.extra_ie); | |
258 | sdata->u.sta.extra_ie = NULL; | |
259 | kfree(sdata->u.sta.assocreq_ies); | |
260 | sdata->u.sta.assocreq_ies = NULL; | |
261 | kfree(sdata->u.sta.assocresp_ies); | |
262 | sdata->u.sta.assocresp_ies = NULL; | |
263 | if (sdata->u.sta.probe_resp) { | |
264 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
265 | sdata->u.sta.probe_resp = NULL; | |
266 | } | |
267 | ||
268 | break; | |
269 | case IEEE80211_IF_TYPE_MNTR: | |
270 | dev->type = ARPHRD_ETHER; | |
271 | break; | |
0ec3ca44 JB |
272 | case IEEE80211_IF_TYPE_VLAN: |
273 | sdata->u.vlan.ap = NULL; | |
274 | break; | |
f0706e82 JB |
275 | } |
276 | ||
44213b5e JB |
277 | flushed = sta_info_flush(local, sdata); |
278 | WARN_ON(flushed); | |
f0706e82 JB |
279 | |
280 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
281 | ieee80211_if_sdata_init(sdata); | |
282 | } | |
283 | ||
284 | /* Must be called with rtnl lock held. */ | |
285 | void __ieee80211_if_del(struct ieee80211_local *local, | |
286 | struct ieee80211_sub_if_data *sdata) | |
287 | { | |
288 | struct net_device *dev = sdata->dev; | |
289 | ||
e9f207f0 | 290 | ieee80211_debugfs_remove_netdev(sdata); |
f0706e82 JB |
291 | unregister_netdevice(dev); |
292 | /* Except master interface, the net_device will be freed by | |
293 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
294 | } | |
295 | ||
296 | /* Must be called with rtnl lock held. */ | |
297 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
298 | { | |
299 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
300 | struct ieee80211_sub_if_data *sdata, *n; | |
301 | ||
302 | ASSERT_RTNL(); | |
303 | ||
79010420 | 304 | list_for_each_entry_safe(sdata, n, &local->interfaces, list) { |
51fb61e7 | 305 | if ((sdata->vif.type == id || id == -1) && |
f0706e82 JB |
306 | strcmp(name, sdata->dev->name) == 0 && |
307 | sdata->dev != local->mdev) { | |
79010420 JB |
308 | list_del_rcu(&sdata->list); |
309 | synchronize_rcu(); | |
f0706e82 | 310 | __ieee80211_if_del(local, sdata); |
f0706e82 JB |
311 | return 0; |
312 | } | |
313 | } | |
f0706e82 JB |
314 | return -ENODEV; |
315 | } | |
316 | ||
317 | void ieee80211_if_free(struct net_device *dev) | |
318 | { | |
f0706e82 JB |
319 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
320 | ||
f0706e82 JB |
321 | ieee80211_if_sdata_deinit(sdata); |
322 | free_netdev(dev); | |
323 | } |