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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; | |
f0706e82 JB |
25 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
26 | skb_queue_head_init(&sdata->fragments[i].skb_list); | |
11a843b7 JB |
27 | |
28 | INIT_LIST_HEAD(&sdata->key_list); | |
f0706e82 JB |
29 | } |
30 | ||
31 | static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) | |
32 | { | |
33 | int i; | |
34 | ||
35 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
36 | __skb_queue_purge(&sdata->fragments[i].skb_list); | |
37 | } | |
38 | } | |
39 | ||
40 | /* Must be called with rtnl lock held. */ | |
41 | int ieee80211_if_add(struct net_device *dev, const char *name, | |
42 | struct net_device **new_dev, int type) | |
43 | { | |
44 | struct net_device *ndev; | |
45 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
46 | struct ieee80211_sub_if_data *sdata = NULL; | |
47 | int ret; | |
48 | ||
49 | ASSERT_RTNL(); | |
32bfd35d | 50 | ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, |
f0706e82 JB |
51 | name, ieee80211_if_setup); |
52 | if (!ndev) | |
53 | return -ENOMEM; | |
54 | ||
55 | ret = dev_alloc_name(ndev, ndev->name); | |
56 | if (ret < 0) | |
57 | goto fail; | |
58 | ||
59 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
60 | ndev->base_addr = dev->base_addr; | |
61 | ndev->irq = dev->irq; | |
62 | ndev->mem_start = dev->mem_start; | |
63 | ndev->mem_end = dev->mem_end; | |
64 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); | |
65 | ||
66 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); | |
67 | ndev->ieee80211_ptr = &sdata->wdev; | |
68 | sdata->wdev.wiphy = local->hw.wiphy; | |
69 | sdata->type = IEEE80211_IF_TYPE_AP; | |
70 | sdata->dev = ndev; | |
71 | sdata->local = local; | |
72 | ieee80211_if_sdata_init(sdata); | |
73 | ||
74 | ret = register_netdevice(ndev); | |
75 | if (ret) | |
76 | goto fail; | |
77 | ||
e9f207f0 | 78 | ieee80211_debugfs_add_netdev(sdata); |
f0706e82 JB |
79 | ieee80211_if_set_type(ndev, type); |
80 | ||
79010420 | 81 | /* we're under RTNL so all this is fine */ |
f0706e82 | 82 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { |
f0706e82 JB |
83 | __ieee80211_if_del(local, sdata); |
84 | return -ENODEV; | |
85 | } | |
79010420 JB |
86 | list_add_tail_rcu(&sdata->list, &local->interfaces); |
87 | ||
f0706e82 JB |
88 | if (new_dev) |
89 | *new_dev = ndev; | |
f0706e82 | 90 | |
f0706e82 JB |
91 | return 0; |
92 | ||
93 | fail: | |
94 | free_netdev(ndev); | |
95 | return ret; | |
96 | } | |
97 | ||
f0706e82 JB |
98 | void ieee80211_if_set_type(struct net_device *dev, int type) |
99 | { | |
100 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
e9f207f0 | 101 | int oldtype = sdata->type; |
f0706e82 | 102 | |
5b2812e9 JB |
103 | /* |
104 | * We need to call this function on the master interface | |
105 | * which already has a hard_start_xmit routine assigned | |
106 | * which must not be changed. | |
107 | */ | |
0654ff05 | 108 | if (dev != sdata->local->mdev) |
5b2812e9 JB |
109 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
110 | ||
111 | /* | |
112 | * Called even when register_netdevice fails, it would | |
113 | * oops if assigned before initialising the rest. | |
114 | */ | |
115 | dev->uninit = ieee80211_if_reinit; | |
116 | ||
117 | /* most have no BSS pointer */ | |
118 | sdata->bss = NULL; | |
f0706e82 | 119 | sdata->type = type; |
5b2812e9 | 120 | |
f0706e82 JB |
121 | switch (type) { |
122 | case IEEE80211_IF_TYPE_WDS: | |
5b2812e9 | 123 | /* nothing special */ |
f0706e82 JB |
124 | break; |
125 | case IEEE80211_IF_TYPE_VLAN: | |
0ec3ca44 | 126 | sdata->u.vlan.ap = NULL; |
f0706e82 JB |
127 | break; |
128 | case IEEE80211_IF_TYPE_AP: | |
129 | sdata->u.ap.dtim_period = 2; | |
130 | sdata->u.ap.force_unicast_rateidx = -1; | |
131 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
132 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); | |
133 | sdata->bss = &sdata->u.ap; | |
0ec3ca44 | 134 | INIT_LIST_HEAD(&sdata->u.ap.vlans); |
f0706e82 JB |
135 | break; |
136 | case IEEE80211_IF_TYPE_STA: | |
137 | case IEEE80211_IF_TYPE_IBSS: { | |
138 | struct ieee80211_sub_if_data *msdata; | |
139 | struct ieee80211_if_sta *ifsta; | |
140 | ||
141 | ifsta = &sdata->u.sta; | |
142 | INIT_WORK(&ifsta->work, ieee80211_sta_work); | |
143 | setup_timer(&ifsta->timer, ieee80211_sta_timer, | |
144 | (unsigned long) sdata); | |
145 | skb_queue_head_init(&ifsta->skb_queue); | |
146 | ||
147 | ifsta->capab = WLAN_CAPABILITY_ESS; | |
148 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | | |
149 | IEEE80211_AUTH_ALG_SHARED_KEY; | |
d6f2da5b JS |
150 | ifsta->flags |= IEEE80211_STA_CREATE_IBSS | |
151 | IEEE80211_STA_WMM_ENABLED | | |
152 | IEEE80211_STA_AUTO_BSSID_SEL | | |
153 | IEEE80211_STA_AUTO_CHANNEL_SEL; | |
f0706e82 JB |
154 | |
155 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); | |
156 | sdata->bss = &msdata->u.ap; | |
157 | break; | |
158 | } | |
159 | case IEEE80211_IF_TYPE_MNTR: | |
160 | dev->type = ARPHRD_IEEE80211_RADIOTAP; | |
40f7cac9 | 161 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
f0706e82 JB |
162 | break; |
163 | default: | |
164 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", | |
165 | dev->name, __FUNCTION__, type); | |
166 | } | |
e9f207f0 | 167 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
f0706e82 JB |
168 | } |
169 | ||
170 | /* Must be called with rtnl lock held. */ | |
171 | void ieee80211_if_reinit(struct net_device *dev) | |
172 | { | |
173 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
174 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
175 | struct sta_info *sta; | |
5b2812e9 | 176 | struct sk_buff *skb; |
f0706e82 JB |
177 | |
178 | ASSERT_RTNL(); | |
11a843b7 JB |
179 | |
180 | ieee80211_free_keys(sdata); | |
181 | ||
f0706e82 | 182 | ieee80211_if_sdata_deinit(sdata); |
f0706e82 JB |
183 | |
184 | switch (sdata->type) { | |
a2897552 JB |
185 | case IEEE80211_IF_TYPE_INVALID: |
186 | /* cannot happen */ | |
187 | WARN_ON(1); | |
188 | break; | |
f0706e82 JB |
189 | case IEEE80211_IF_TYPE_AP: { |
190 | /* Remove all virtual interfaces that use this BSS | |
191 | * as their sdata->bss */ | |
192 | struct ieee80211_sub_if_data *tsdata, *n; | |
f0706e82 | 193 | |
79010420 | 194 | list_for_each_entry_safe(tsdata, n, &local->interfaces, list) { |
f0706e82 JB |
195 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { |
196 | printk(KERN_DEBUG "%s: removing virtual " | |
197 | "interface %s because its BSS interface" | |
198 | " is being removed\n", | |
199 | sdata->dev->name, tsdata->dev->name); | |
79010420 JB |
200 | list_del_rcu(&tsdata->list); |
201 | /* | |
202 | * We have lots of time and can afford | |
203 | * to sync for each interface | |
204 | */ | |
205 | synchronize_rcu(); | |
206 | __ieee80211_if_del(local, tsdata); | |
f0706e82 JB |
207 | } |
208 | } | |
f0706e82 JB |
209 | |
210 | kfree(sdata->u.ap.beacon_head); | |
211 | kfree(sdata->u.ap.beacon_tail); | |
f0706e82 | 212 | |
5b2812e9 JB |
213 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
214 | local->total_ps_buffered--; | |
215 | dev_kfree_skb(skb); | |
f0706e82 JB |
216 | } |
217 | ||
218 | break; | |
219 | } | |
220 | case IEEE80211_IF_TYPE_WDS: | |
221 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
222 | if (sta) { | |
be8755e1 | 223 | sta_info_free(sta); |
f0706e82 | 224 | sta_info_put(sta); |
f0706e82 JB |
225 | } else { |
226 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
227 | printk(KERN_DEBUG "%s: Someone had deleted my STA " | |
228 | "entry for the WDS link\n", dev->name); | |
229 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
230 | } | |
231 | break; | |
232 | case IEEE80211_IF_TYPE_STA: | |
233 | case IEEE80211_IF_TYPE_IBSS: | |
234 | kfree(sdata->u.sta.extra_ie); | |
235 | sdata->u.sta.extra_ie = NULL; | |
236 | kfree(sdata->u.sta.assocreq_ies); | |
237 | sdata->u.sta.assocreq_ies = NULL; | |
238 | kfree(sdata->u.sta.assocresp_ies); | |
239 | sdata->u.sta.assocresp_ies = NULL; | |
240 | if (sdata->u.sta.probe_resp) { | |
241 | dev_kfree_skb(sdata->u.sta.probe_resp); | |
242 | sdata->u.sta.probe_resp = NULL; | |
243 | } | |
244 | ||
245 | break; | |
246 | case IEEE80211_IF_TYPE_MNTR: | |
247 | dev->type = ARPHRD_ETHER; | |
248 | break; | |
0ec3ca44 JB |
249 | case IEEE80211_IF_TYPE_VLAN: |
250 | sdata->u.vlan.ap = NULL; | |
251 | break; | |
f0706e82 JB |
252 | } |
253 | ||
254 | /* remove all STAs that are bound to this virtual interface */ | |
255 | sta_info_flush(local, dev); | |
256 | ||
257 | memset(&sdata->u, 0, sizeof(sdata->u)); | |
258 | ieee80211_if_sdata_init(sdata); | |
259 | } | |
260 | ||
261 | /* Must be called with rtnl lock held. */ | |
262 | void __ieee80211_if_del(struct ieee80211_local *local, | |
263 | struct ieee80211_sub_if_data *sdata) | |
264 | { | |
265 | struct net_device *dev = sdata->dev; | |
266 | ||
e9f207f0 | 267 | ieee80211_debugfs_remove_netdev(sdata); |
f0706e82 JB |
268 | unregister_netdevice(dev); |
269 | /* Except master interface, the net_device will be freed by | |
270 | * net_device->destructor (i. e. ieee80211_if_free). */ | |
271 | } | |
272 | ||
273 | /* Must be called with rtnl lock held. */ | |
274 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) | |
275 | { | |
276 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
277 | struct ieee80211_sub_if_data *sdata, *n; | |
278 | ||
279 | ASSERT_RTNL(); | |
280 | ||
79010420 | 281 | list_for_each_entry_safe(sdata, n, &local->interfaces, list) { |
f0706e82 JB |
282 | if ((sdata->type == id || id == -1) && |
283 | strcmp(name, sdata->dev->name) == 0 && | |
284 | sdata->dev != local->mdev) { | |
79010420 JB |
285 | list_del_rcu(&sdata->list); |
286 | synchronize_rcu(); | |
f0706e82 | 287 | __ieee80211_if_del(local, sdata); |
f0706e82 JB |
288 | return 0; |
289 | } | |
290 | } | |
f0706e82 JB |
291 | return -ENODEV; |
292 | } | |
293 | ||
294 | void ieee80211_if_free(struct net_device *dev) | |
295 | { | |
f0706e82 JB |
296 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
297 | ||
f0706e82 JB |
298 | ieee80211_if_sdata_deinit(sdata); |
299 | free_netdev(dev); | |
300 | } |