2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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.
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"
17 #include "debugfs_netdev.h"
19 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data
*sdata
)
23 /* Default values for sub-interface parameters */
24 sdata
->drop_unencrypted
= 0;
26 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
27 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
29 INIT_LIST_HEAD(&sdata
->key_list
);
32 static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data
*sdata
)
36 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
37 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
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
)
45 struct net_device
*ndev
;
46 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
47 struct ieee80211_sub_if_data
*sdata
= NULL
;
51 ndev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
52 name
, ieee80211_if_setup
);
56 ret
= dev_alloc_name(ndev
, ndev
->name
);
60 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
61 ndev
->base_addr
= dev
->base_addr
;
63 ndev
->mem_start
= dev
->mem_start
;
64 ndev
->mem_end
= dev
->mem_end
;
65 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
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
;
73 ieee80211_if_sdata_init(sdata
);
75 ret
= register_netdevice(ndev
);
79 ieee80211_debugfs_add_netdev(sdata
);
80 ieee80211_if_set_type(ndev
, type
);
82 /* we're under RTNL so all this is fine */
83 if (unlikely(local
->reg_state
== IEEE80211_DEV_UNREGISTERED
)) {
84 __ieee80211_if_del(local
, sdata
);
87 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
99 int ieee80211_if_add_mgmt(struct ieee80211_local
*local
)
101 struct net_device
*ndev
;
102 struct ieee80211_sub_if_data
*nsdata
;
107 ndev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
), "wmgmt%d",
108 ieee80211_if_mgmt_setup
);
111 ret
= dev_alloc_name(ndev
, ndev
->name
);
115 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
116 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
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
;
123 nsdata
->local
= local
;
124 ieee80211_if_sdata_init(nsdata
);
126 ret
= register_netdevice(ndev
);
130 ieee80211_debugfs_add_netdev(nsdata
);
132 if (local
->open_count
> 0)
142 void ieee80211_if_del_mgmt(struct ieee80211_local
*local
)
144 struct net_device
*apdev
;
147 apdev
= local
->apdev
;
148 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev
));
150 unregister_netdevice(apdev
);
153 void ieee80211_if_set_type(struct net_device
*dev
, int type
)
155 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
156 int oldtype
= sdata
->type
;
158 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
162 case IEEE80211_IF_TYPE_WDS
:
165 case IEEE80211_IF_TYPE_VLAN
:
166 sdata
->u
.vlan
.ap
= NULL
;
168 case IEEE80211_IF_TYPE_AP
:
169 sdata
->u
.ap
.dtim_period
= 2;
170 sdata
->u
.ap
.force_unicast_rateidx
= -1;
171 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
172 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
173 sdata
->bss
= &sdata
->u
.ap
;
174 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
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
;
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
);
187 ifsta
->capab
= WLAN_CAPABILITY_ESS
;
188 ifsta
->auth_algs
= IEEE80211_AUTH_ALG_OPEN
|
189 IEEE80211_AUTH_ALG_SHARED_KEY
;
190 ifsta
->flags
|= IEEE80211_STA_CREATE_IBSS
|
191 IEEE80211_STA_WMM_ENABLED
|
192 IEEE80211_STA_AUTO_BSSID_SEL
|
193 IEEE80211_STA_AUTO_CHANNEL_SEL
;
195 msdata
= IEEE80211_DEV_TO_SUB_IF(sdata
->local
->mdev
);
196 sdata
->bss
= &msdata
->u
.ap
;
199 case IEEE80211_IF_TYPE_MNTR
:
200 dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
201 dev
->hard_start_xmit
= ieee80211_monitor_start_xmit
;
204 printk(KERN_WARNING
"%s: %s: Unknown interface type 0x%x",
205 dev
->name
, __FUNCTION__
, type
);
207 ieee80211_debugfs_change_if_type(sdata
, oldtype
);
210 /* Must be called with rtnl lock held. */
211 void ieee80211_if_reinit(struct net_device
*dev
)
213 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
214 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
215 struct sta_info
*sta
;
219 ieee80211_free_keys(sdata
);
221 ieee80211_if_sdata_deinit(sdata
);
223 switch (sdata
->type
) {
224 case IEEE80211_IF_TYPE_AP
: {
225 /* Remove all virtual interfaces that use this BSS
226 * as their sdata->bss */
227 struct ieee80211_sub_if_data
*tsdata
, *n
;
229 list_for_each_entry_safe(tsdata
, n
, &local
->interfaces
, list
) {
230 if (tsdata
!= sdata
&& tsdata
->bss
== &sdata
->u
.ap
) {
231 printk(KERN_DEBUG
"%s: removing virtual "
232 "interface %s because its BSS interface"
233 " is being removed\n",
234 sdata
->dev
->name
, tsdata
->dev
->name
);
235 list_del_rcu(&tsdata
->list
);
237 * We have lots of time and can afford
238 * to sync for each interface
241 __ieee80211_if_del(local
, tsdata
);
245 kfree(sdata
->u
.ap
.beacon_head
);
246 kfree(sdata
->u
.ap
.beacon_tail
);
247 kfree(sdata
->u
.ap
.generic_elem
);
249 if (dev
!= local
->mdev
) {
251 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
252 local
->total_ps_buffered
--;
259 case IEEE80211_IF_TYPE_WDS
:
260 sta
= sta_info_get(local
, sdata
->u
.wds
.remote_addr
);
265 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
266 printk(KERN_DEBUG
"%s: Someone had deleted my STA "
267 "entry for the WDS link\n", dev
->name
);
268 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
271 case IEEE80211_IF_TYPE_STA
:
272 case IEEE80211_IF_TYPE_IBSS
:
273 kfree(sdata
->u
.sta
.extra_ie
);
274 sdata
->u
.sta
.extra_ie
= NULL
;
275 kfree(sdata
->u
.sta
.assocreq_ies
);
276 sdata
->u
.sta
.assocreq_ies
= NULL
;
277 kfree(sdata
->u
.sta
.assocresp_ies
);
278 sdata
->u
.sta
.assocresp_ies
= NULL
;
279 if (sdata
->u
.sta
.probe_resp
) {
280 dev_kfree_skb(sdata
->u
.sta
.probe_resp
);
281 sdata
->u
.sta
.probe_resp
= NULL
;
285 case IEEE80211_IF_TYPE_MNTR
:
286 dev
->type
= ARPHRD_ETHER
;
288 case IEEE80211_IF_TYPE_VLAN
:
289 sdata
->u
.vlan
.ap
= NULL
;
293 /* remove all STAs that are bound to this virtual interface */
294 sta_info_flush(local
, dev
);
296 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
297 ieee80211_if_sdata_init(sdata
);
300 /* Must be called with rtnl lock held. */
301 void __ieee80211_if_del(struct ieee80211_local
*local
,
302 struct ieee80211_sub_if_data
*sdata
)
304 struct net_device
*dev
= sdata
->dev
;
306 ieee80211_debugfs_remove_netdev(sdata
);
307 unregister_netdevice(dev
);
308 /* Except master interface, the net_device will be freed by
309 * net_device->destructor (i. e. ieee80211_if_free). */
312 /* Must be called with rtnl lock held. */
313 int ieee80211_if_remove(struct net_device
*dev
, const char *name
, int id
)
315 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
316 struct ieee80211_sub_if_data
*sdata
, *n
;
320 list_for_each_entry_safe(sdata
, n
, &local
->interfaces
, list
) {
321 if ((sdata
->type
== id
|| id
== -1) &&
322 strcmp(name
, sdata
->dev
->name
) == 0 &&
323 sdata
->dev
!= local
->mdev
) {
324 list_del_rcu(&sdata
->list
);
326 __ieee80211_if_del(local
, sdata
);
333 void ieee80211_if_free(struct net_device
*dev
)
335 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
336 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
338 /* local->apdev must be NULL when freeing management interface */
339 BUG_ON(dev
== local
->apdev
);
340 ieee80211_if_sdata_deinit(sdata
);