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);
131 * Called even when register_netdevice fails, it would
132 * oops if assigned before initialising the rest.
134 ndev->uninit = ieee80211_if_reinit;
136 ieee80211_debugfs_add_netdev(nsdata);
138 if (local->open_count > 0)
148 void ieee80211_if_del_mgmt(struct ieee80211_local *local)
150 struct net_device *apdev;
153 apdev = local->apdev;
154 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev));
156 unregister_netdevice(apdev);
159 void ieee80211_if_set_type(struct net_device *dev, int type)
161 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
162 int oldtype = sdata->type;
165 * We need to call this function on the master interface
166 * which already has a hard_start_xmit routine assigned
167 * which must not be changed.
169 if (!dev->hard_start_xmit)
170 dev->hard_start_xmit = ieee80211_subif_start_xmit;
173 * Called even when register_netdevice fails, it would
174 * oops if assigned before initialising the rest.
176 dev->uninit = ieee80211_if_reinit;
178 /* most have no BSS pointer */
183 case IEEE80211_IF_TYPE_WDS:
184 /* nothing special */
186 case IEEE80211_IF_TYPE_VLAN:
187 sdata->u.vlan.ap = NULL;
189 case IEEE80211_IF_TYPE_AP:
190 sdata->u.ap.dtim_period = 2;
191 sdata->u.ap.force_unicast_rateidx = -1;
192 sdata->u.ap.max_ratectrl_rateidx = -1;
193 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
194 sdata->bss = &sdata->u.ap;
195 INIT_LIST_HEAD(&sdata->u.ap.vlans);
197 case IEEE80211_IF_TYPE_STA:
198 case IEEE80211_IF_TYPE_IBSS: {
199 struct ieee80211_sub_if_data *msdata;
200 struct ieee80211_if_sta *ifsta;
202 ifsta = &sdata->u.sta;
203 INIT_WORK(&ifsta->work, ieee80211_sta_work);
204 setup_timer(&ifsta->timer, ieee80211_sta_timer,
205 (unsigned long) sdata);
206 skb_queue_head_init(&ifsta->skb_queue);
208 ifsta->capab = WLAN_CAPABILITY_ESS;
209 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
210 IEEE80211_AUTH_ALG_SHARED_KEY;
211 ifsta->flags |= IEEE80211_STA_CREATE_IBSS |
212 IEEE80211_STA_WMM_ENABLED |
213 IEEE80211_STA_AUTO_BSSID_SEL |
214 IEEE80211_STA_AUTO_CHANNEL_SEL;
216 msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
217 sdata->bss = &msdata->u.ap;
220 case IEEE80211_IF_TYPE_MNTR:
221 dev->type = ARPHRD_IEEE80211_RADIOTAP;
222 dev->hard_start_xmit = ieee80211_monitor_start_xmit;
225 printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
226 dev->name, __FUNCTION__, type);
228 ieee80211_debugfs_change_if_type(sdata, oldtype);
231 /* Must be called with rtnl lock held. */
232 void ieee80211_if_reinit(struct net_device *dev)
234 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
235 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
236 struct sta_info *sta;
241 ieee80211_free_keys(sdata);
243 ieee80211_if_sdata_deinit(sdata);
245 switch (sdata->type) {
246 case IEEE80211_IF_TYPE_MGMT:
249 case IEEE80211_IF_TYPE_AP: {
250 /* Remove all virtual interfaces that use this BSS
251 * as their sdata->bss */
252 struct ieee80211_sub_if_data *tsdata, *n;
254 list_for_each_entry_safe(tsdata, n, &local->interfaces, list) {
255 if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
256 printk(KERN_DEBUG "%s: removing virtual "
257 "interface %s because its BSS interface"
258 " is being removed\n",
259 sdata->dev->name, tsdata->dev->name);
260 list_del_rcu(&tsdata->list);
262 * We have lots of time and can afford
263 * to sync for each interface
266 __ieee80211_if_del(local, tsdata);
270 kfree(sdata->u.ap.beacon_head);
271 kfree(sdata->u.ap.beacon_tail);
273 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
274 local->total_ps_buffered--;
280 case IEEE80211_IF_TYPE_WDS:
281 sta = sta_info_get(local, sdata->u.wds.remote_addr);
286 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
287 printk(KERN_DEBUG "%s: Someone had deleted my STA "
288 "entry for the WDS link\n", dev->name);
289 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
292 case IEEE80211_IF_TYPE_STA:
293 case IEEE80211_IF_TYPE_IBSS:
294 kfree(sdata->u.sta.extra_ie);
295 sdata->u.sta.extra_ie = NULL;
296 kfree(sdata->u.sta.assocreq_ies);
297 sdata->u.sta.assocreq_ies = NULL;
298 kfree(sdata->u.sta.assocresp_ies);
299 sdata->u.sta.assocresp_ies = NULL;
300 if (sdata->u.sta.probe_resp) {
301 dev_kfree_skb(sdata->u.sta.probe_resp);
302 sdata->u.sta.probe_resp = NULL;
306 case IEEE80211_IF_TYPE_MNTR:
307 dev->type = ARPHRD_ETHER;
309 case IEEE80211_IF_TYPE_VLAN:
310 sdata->u.vlan.ap = NULL;
314 /* remove all STAs that are bound to this virtual interface */
315 sta_info_flush(local, dev);
317 memset(&sdata->u, 0, sizeof(sdata->u));
318 ieee80211_if_sdata_init(sdata);
321 /* Must be called with rtnl lock held. */
322 void __ieee80211_if_del(struct ieee80211_local *local,
323 struct ieee80211_sub_if_data *sdata)
325 struct net_device *dev = sdata->dev;
327 ieee80211_debugfs_remove_netdev(sdata);
328 unregister_netdevice(dev);
329 /* Except master interface, the net_device will be freed by
330 * net_device->destructor (i. e. ieee80211_if_free). */
333 /* Must be called with rtnl lock held. */
334 int ieee80211_if_remove(struct net_device *dev, const char *name, int id)
336 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
337 struct ieee80211_sub_if_data *sdata, *n;
341 list_for_each_entry_safe(sdata, n, &local->interfaces, list) {
342 if ((sdata->type == id || id == -1) &&
343 strcmp(name, sdata->dev->name) == 0 &&
344 sdata->dev != local->mdev) {
345 list_del_rcu(&sdata->list);
347 __ieee80211_if_del(local, sdata);
354 void ieee80211_if_free(struct net_device *dev)
356 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
357 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
359 /* local->apdev must be NULL when freeing management interface */
360 BUG_ON(dev == local->apdev);
361 ieee80211_if_sdata_deinit(sdata);