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/d80211.h>
15 #include "ieee80211_i.h"
18 void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata)
22 /* Default values for sub-interface parameters */
23 sdata->drop_unencrypted = 0;
25 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
26 skb_queue_head_init(&sdata->fragments[i].skb_list);
29 static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata)
33 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) {
34 __skb_queue_purge(&sdata->fragments[i].skb_list);
38 /* Must be called with rtnl lock held. */
39 int ieee80211_if_add(struct net_device *dev, const char *name,
40 int format, struct net_device **new_dev)
42 struct net_device *ndev, *tmp_dev;
43 struct ieee80211_local *local = dev->ieee80211_ptr;
44 struct ieee80211_sub_if_data *sdata = NULL;
49 ndev = *new_dev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
50 "", ieee80211_if_setup);
54 ndev->ieee80211_ptr = local;
55 if (strlen(name) == 0) {
58 snprintf(ndev->name, sizeof(ndev->name), "%s.%d",
60 tmp_dev = dev_get_by_name(ndev->name);
66 ret = dev_alloc_name(ndev, name);
70 snprintf(ndev->name, IFNAMSIZ, "%s", name);
73 memcpy(ndev->dev_addr, local->hw.perm_addr, ETH_ALEN);
74 ndev->base_addr = dev->base_addr;
76 ndev->mem_start = dev->mem_start;
77 ndev->mem_end = dev->mem_end;
78 ndev->flags = dev->flags & IFF_MULTICAST;
79 SET_NETDEV_DEV(ndev, local->hw.dev);
81 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
82 sdata->type = IEEE80211_IF_TYPE_AP;
85 ieee80211_if_sdata_init(sdata);
87 ret = register_netdevice(ndev);
90 ret = ieee80211_sysfs_add_netdevice(ndev);
92 /* ndev will be freed by ndev->destructor */
93 unregister_netdevice(ndev);
98 list_add(&sdata->list, &local->sub_if_list);
99 ieee80211_update_default_wep_only(local);
109 int ieee80211_if_add_mgmt(struct ieee80211_local *local)
111 struct net_device *ndev;
112 struct ieee80211_sub_if_data *nsdata;
117 ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "",
118 ieee80211_if_mgmt_setup);
121 ret = dev_alloc_name(ndev, "wmgmt%d");
125 ndev->ieee80211_ptr = local;
126 memcpy(ndev->dev_addr, local->hw.perm_addr, ETH_ALEN);
127 SET_NETDEV_DEV(ndev, local->hw.dev);
129 nsdata = IEEE80211_DEV_TO_SUB_IF(ndev);
130 nsdata->type = IEEE80211_IF_TYPE_MGMT;
132 nsdata->local = local;
133 ieee80211_if_sdata_init(nsdata);
135 ret = register_netdevice(ndev);
138 ret = ieee80211_sysfs_add_netdevice(ndev);
141 if (local->open_count > 0)
147 unregister_netdevice(ndev);
153 void ieee80211_if_del_mgmt(struct ieee80211_local *local)
155 struct net_device *apdev;
158 apdev = local->apdev;
159 ieee80211_sysfs_remove_netdevice(apdev);
161 unregister_netdevice(apdev);
164 void ieee80211_if_set_type(struct net_device *dev, int type)
166 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
167 struct ieee80211_local *local = dev->ieee80211_ptr;
171 case IEEE80211_IF_TYPE_WDS:
174 case IEEE80211_IF_TYPE_VLAN:
176 case IEEE80211_IF_TYPE_AP:
177 sdata->u.ap.dtim_period = 2;
178 sdata->u.ap.force_unicast_rateidx = -1;
179 sdata->u.ap.max_ratectrl_rateidx = -1;
180 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
181 sdata->bss = &sdata->u.ap;
183 case IEEE80211_IF_TYPE_STA:
184 case IEEE80211_IF_TYPE_IBSS: {
185 struct ieee80211_sub_if_data *msdata;
186 struct ieee80211_if_sta *ifsta;
188 ifsta = &sdata->u.sta;
189 INIT_DELAYED_WORK(&ifsta->work, ieee80211_sta_work);
191 ifsta->capab = WLAN_CAPABILITY_ESS;
192 ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN |
193 IEEE80211_AUTH_ALG_SHARED_KEY;
194 ifsta->create_ibss = 1;
195 ifsta->wmm_enabled = 1;
197 msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev);
198 sdata->bss = &msdata->u.ap;
201 case IEEE80211_IF_TYPE_MNTR:
202 dev->type = ARPHRD_IEEE80211_PRISM;
205 printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x",
206 dev->name, __FUNCTION__, type);
208 ieee80211_sysfs_change_if_type(dev);
209 ieee80211_update_default_wep_only(local);
212 /* Must be called with rtnl lock held. */
213 void ieee80211_if_reinit(struct net_device *dev)
215 struct ieee80211_local *local = dev->ieee80211_ptr;
216 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
217 struct sta_info *sta;
221 ieee80211_if_sdata_deinit(sdata);
222 for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
226 /* The interface is down at the moment, so there is not
227 * really much point in disabling the keys at this point. */
228 memset(addr, 0xff, ETH_ALEN);
229 if (local->ops->set_key)
230 local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr,
233 ieee80211_key_free(sdata->keys[i]);
234 sdata->keys[i] = NULL;
237 switch (sdata->type) {
238 case IEEE80211_IF_TYPE_AP: {
239 /* Remove all virtual interfaces that use this BSS
240 * as their sdata->bss */
241 struct ieee80211_sub_if_data *tsdata, *n;
243 list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) {
244 if (tsdata != sdata && tsdata->bss == &sdata->u.ap) {
245 printk(KERN_DEBUG "%s: removing virtual "
246 "interface %s because its BSS interface"
247 " is being removed\n",
248 sdata->dev->name, tsdata->dev->name);
249 __ieee80211_if_del(local, tsdata);
253 kfree(sdata->u.ap.beacon_head);
254 kfree(sdata->u.ap.beacon_tail);
255 kfree(sdata->u.ap.generic_elem);
257 if (dev != local->mdev) {
259 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
260 local->total_ps_buffered--;
267 case IEEE80211_IF_TYPE_WDS:
268 sta = sta_info_get(local, sdata->u.wds.remote_addr);
271 sta_info_free(sta, 0);
273 #ifdef CONFIG_D80211_VERBOSE_DEBUG
274 printk(KERN_DEBUG "%s: Someone had deleted my STA "
275 "entry for the WDS link\n", dev->name);
276 #endif /* CONFIG_D80211_VERBOSE_DEBUG */
279 case IEEE80211_IF_TYPE_STA:
280 case IEEE80211_IF_TYPE_IBSS:
281 kfree(sdata->u.sta.extra_ie);
282 sdata->u.sta.extra_ie = NULL;
283 kfree(sdata->u.sta.assocreq_ies);
284 sdata->u.sta.assocreq_ies = NULL;
285 kfree(sdata->u.sta.assocresp_ies);
286 sdata->u.sta.assocresp_ies = NULL;
287 if (sdata->u.sta.probe_resp) {
288 dev_kfree_skb(sdata->u.sta.probe_resp);
289 sdata->u.sta.probe_resp = NULL;
293 case IEEE80211_IF_TYPE_MNTR:
294 dev->type = ARPHRD_ETHER;
298 /* remove all STAs that are bound to this virtual interface */
299 sta_info_flush(local, dev);
301 memset(&sdata->u, 0, sizeof(sdata->u));
302 ieee80211_if_sdata_init(sdata);
305 /* Must be called with rtnl lock held. */
306 void __ieee80211_if_del(struct ieee80211_local *local,
307 struct ieee80211_sub_if_data *sdata)
309 struct net_device *dev = sdata->dev;
311 list_del(&sdata->list);
312 ieee80211_sysfs_remove_netdevice(dev);
313 unregister_netdevice(dev);
314 /* Except master interface, the net_device will be freed by
315 * net_device->destructor (i. e. ieee80211_if_free). */
318 /* Must be called with rtnl lock held. */
319 int ieee80211_if_remove(struct net_device *dev, const char *name, int id)
321 struct ieee80211_local *local = dev->ieee80211_ptr;
322 struct ieee80211_sub_if_data *sdata, *n;
326 list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
327 if ((sdata->type == id || id == -1) &&
328 strcmp(name, sdata->dev->name) == 0 &&
329 sdata->dev != local->mdev) {
330 __ieee80211_if_del(local, sdata);
331 ieee80211_update_default_wep_only(local);
338 void ieee80211_if_free(struct net_device *dev)
340 struct ieee80211_local *local = dev->ieee80211_ptr;
341 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
343 /* local->apdev must be NULL when freeing management interface */
344 BUG_ON(dev == local->apdev);
345 ieee80211_if_sdata_deinit(sdata);
349 /* Must be called with rtnl lock held. */
350 void ieee80211_if_flush(struct net_device *dev)
352 struct ieee80211_local *local = dev->ieee80211_ptr;
353 struct ieee80211_sub_if_data *sdata, *n;
356 list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) {
357 __ieee80211_if_del(local, sdata);
361 void ieee80211_if_del(struct net_device *dev)
363 struct ieee80211_local *local = dev->ieee80211_ptr;
364 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
367 if (sdata->type == IEEE80211_IF_TYPE_MGMT)
368 ieee80211_if_del_mgmt(local);
370 __ieee80211_if_del(local, sdata);