Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 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" |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 17 | #include "debugfs_netdev.h" |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 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; |
| 25 | sdata->eapol = 1; |
| 26 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) |
| 27 | skb_queue_head_init(&sdata->fragments[i].skb_list); |
| 28 | } |
| 29 | |
| 30 | static void ieee80211_if_sdata_deinit(struct ieee80211_sub_if_data *sdata) |
| 31 | { |
| 32 | int i; |
| 33 | |
| 34 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { |
| 35 | __skb_queue_purge(&sdata->fragments[i].skb_list); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | /* Must be called with rtnl lock held. */ |
| 40 | int ieee80211_if_add(struct net_device *dev, const char *name, |
| 41 | struct net_device **new_dev, int type) |
| 42 | { |
| 43 | struct net_device *ndev; |
| 44 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 45 | struct ieee80211_sub_if_data *sdata = NULL; |
| 46 | int ret; |
| 47 | |
| 48 | ASSERT_RTNL(); |
| 49 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), |
| 50 | name, ieee80211_if_setup); |
| 51 | if (!ndev) |
| 52 | return -ENOMEM; |
| 53 | |
| 54 | ret = dev_alloc_name(ndev, ndev->name); |
| 55 | if (ret < 0) |
| 56 | goto fail; |
| 57 | |
| 58 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 59 | ndev->base_addr = dev->base_addr; |
| 60 | ndev->irq = dev->irq; |
| 61 | ndev->mem_start = dev->mem_start; |
| 62 | ndev->mem_end = dev->mem_end; |
| 63 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| 64 | |
| 65 | sdata = IEEE80211_DEV_TO_SUB_IF(ndev); |
| 66 | ndev->ieee80211_ptr = &sdata->wdev; |
| 67 | sdata->wdev.wiphy = local->hw.wiphy; |
| 68 | sdata->type = IEEE80211_IF_TYPE_AP; |
| 69 | sdata->dev = ndev; |
| 70 | sdata->local = local; |
| 71 | ieee80211_if_sdata_init(sdata); |
| 72 | |
| 73 | ret = register_netdevice(ndev); |
| 74 | if (ret) |
| 75 | goto fail; |
| 76 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 77 | ieee80211_debugfs_add_netdev(sdata); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 78 | ieee80211_if_set_type(ndev, type); |
| 79 | |
| 80 | write_lock_bh(&local->sub_if_lock); |
| 81 | if (unlikely(local->reg_state == IEEE80211_DEV_UNREGISTERED)) { |
| 82 | write_unlock_bh(&local->sub_if_lock); |
| 83 | __ieee80211_if_del(local, sdata); |
| 84 | return -ENODEV; |
| 85 | } |
| 86 | list_add(&sdata->list, &local->sub_if_list); |
| 87 | if (new_dev) |
| 88 | *new_dev = ndev; |
| 89 | write_unlock_bh(&local->sub_if_lock); |
| 90 | |
| 91 | ieee80211_update_default_wep_only(local); |
| 92 | |
| 93 | return 0; |
| 94 | |
| 95 | fail: |
| 96 | free_netdev(ndev); |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | int ieee80211_if_add_mgmt(struct ieee80211_local *local) |
| 101 | { |
| 102 | struct net_device *ndev; |
| 103 | struct ieee80211_sub_if_data *nsdata; |
| 104 | int ret; |
| 105 | |
| 106 | ASSERT_RTNL(); |
| 107 | |
| 108 | ndev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), "wmgmt%d", |
| 109 | ieee80211_if_mgmt_setup); |
| 110 | if (!ndev) |
| 111 | return -ENOMEM; |
| 112 | ret = dev_alloc_name(ndev, ndev->name); |
| 113 | if (ret < 0) |
| 114 | goto fail; |
| 115 | |
| 116 | memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 117 | SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy)); |
| 118 | |
| 119 | nsdata = IEEE80211_DEV_TO_SUB_IF(ndev); |
| 120 | ndev->ieee80211_ptr = &nsdata->wdev; |
| 121 | nsdata->wdev.wiphy = local->hw.wiphy; |
| 122 | nsdata->type = IEEE80211_IF_TYPE_MGMT; |
| 123 | nsdata->dev = ndev; |
| 124 | nsdata->local = local; |
| 125 | ieee80211_if_sdata_init(nsdata); |
| 126 | |
| 127 | ret = register_netdevice(ndev); |
| 128 | if (ret) |
| 129 | goto fail; |
| 130 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 131 | ieee80211_debugfs_add_netdev(nsdata); |
| 132 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 133 | if (local->open_count > 0) |
| 134 | dev_open(ndev); |
| 135 | local->apdev = ndev; |
| 136 | return 0; |
| 137 | |
| 138 | fail: |
| 139 | free_netdev(ndev); |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | void ieee80211_if_del_mgmt(struct ieee80211_local *local) |
| 144 | { |
| 145 | struct net_device *apdev; |
| 146 | |
| 147 | ASSERT_RTNL(); |
| 148 | apdev = local->apdev; |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 149 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(apdev)); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 150 | local->apdev = NULL; |
| 151 | unregister_netdevice(apdev); |
| 152 | } |
| 153 | |
| 154 | void ieee80211_if_set_type(struct net_device *dev, int type) |
| 155 | { |
| 156 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 157 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 158 | int oldtype = sdata->type; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 159 | |
Johannes Berg | 40f7cac | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 160 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
| 161 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 162 | sdata->type = type; |
| 163 | switch (type) { |
| 164 | case IEEE80211_IF_TYPE_WDS: |
| 165 | sdata->bss = NULL; |
| 166 | break; |
| 167 | case IEEE80211_IF_TYPE_VLAN: |
| 168 | break; |
| 169 | case IEEE80211_IF_TYPE_AP: |
| 170 | sdata->u.ap.dtim_period = 2; |
| 171 | sdata->u.ap.force_unicast_rateidx = -1; |
| 172 | sdata->u.ap.max_ratectrl_rateidx = -1; |
| 173 | skb_queue_head_init(&sdata->u.ap.ps_bc_buf); |
| 174 | sdata->bss = &sdata->u.ap; |
| 175 | break; |
| 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; |
| 180 | |
| 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); |
| 186 | |
| 187 | ifsta->capab = WLAN_CAPABILITY_ESS; |
| 188 | ifsta->auth_algs = IEEE80211_AUTH_ALG_OPEN | |
| 189 | IEEE80211_AUTH_ALG_SHARED_KEY; |
| 190 | ifsta->create_ibss = 1; |
| 191 | ifsta->wmm_enabled = 1; |
| 192 | ifsta->auto_channel_sel = 1; |
| 193 | ifsta->auto_bssid_sel = 1; |
| 194 | |
| 195 | msdata = IEEE80211_DEV_TO_SUB_IF(sdata->local->mdev); |
| 196 | sdata->bss = &msdata->u.ap; |
| 197 | break; |
| 198 | } |
| 199 | case IEEE80211_IF_TYPE_MNTR: |
| 200 | dev->type = ARPHRD_IEEE80211_RADIOTAP; |
Johannes Berg | 40f7cac | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 201 | dev->hard_start_xmit = ieee80211_monitor_start_xmit; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 202 | break; |
| 203 | default: |
| 204 | printk(KERN_WARNING "%s: %s: Unknown interface type 0x%x", |
| 205 | dev->name, __FUNCTION__, type); |
| 206 | } |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 207 | ieee80211_debugfs_change_if_type(sdata, oldtype); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 208 | ieee80211_update_default_wep_only(local); |
| 209 | } |
| 210 | |
| 211 | /* Must be called with rtnl lock held. */ |
| 212 | void ieee80211_if_reinit(struct net_device *dev) |
| 213 | { |
| 214 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 215 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 216 | struct sta_info *sta; |
| 217 | int i; |
| 218 | |
| 219 | ASSERT_RTNL(); |
| 220 | ieee80211_if_sdata_deinit(sdata); |
| 221 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { |
| 222 | if (!sdata->keys[i]) |
| 223 | continue; |
| 224 | #if 0 |
| 225 | /* The interface is down at the moment, so there is not |
| 226 | * really much point in disabling the keys at this point. */ |
| 227 | memset(addr, 0xff, ETH_ALEN); |
| 228 | if (local->ops->set_key) |
| 229 | local->ops->set_key(local_to_hw(local), DISABLE_KEY, addr, |
| 230 | local->keys[i], 0); |
| 231 | #endif |
| 232 | ieee80211_key_free(sdata->keys[i]); |
| 233 | sdata->keys[i] = NULL; |
| 234 | } |
| 235 | |
| 236 | switch (sdata->type) { |
| 237 | case IEEE80211_IF_TYPE_AP: { |
| 238 | /* Remove all virtual interfaces that use this BSS |
| 239 | * as their sdata->bss */ |
| 240 | struct ieee80211_sub_if_data *tsdata, *n; |
| 241 | LIST_HEAD(tmp_list); |
| 242 | |
| 243 | write_lock_bh(&local->sub_if_lock); |
| 244 | list_for_each_entry_safe(tsdata, n, &local->sub_if_list, list) { |
| 245 | if (tsdata != sdata && tsdata->bss == &sdata->u.ap) { |
| 246 | printk(KERN_DEBUG "%s: removing virtual " |
| 247 | "interface %s because its BSS interface" |
| 248 | " is being removed\n", |
| 249 | sdata->dev->name, tsdata->dev->name); |
| 250 | list_move_tail(&tsdata->list, &tmp_list); |
| 251 | } |
| 252 | } |
| 253 | write_unlock_bh(&local->sub_if_lock); |
| 254 | |
| 255 | list_for_each_entry_safe(tsdata, n, &tmp_list, list) |
| 256 | __ieee80211_if_del(local, tsdata); |
| 257 | |
| 258 | kfree(sdata->u.ap.beacon_head); |
| 259 | kfree(sdata->u.ap.beacon_tail); |
| 260 | kfree(sdata->u.ap.generic_elem); |
| 261 | |
| 262 | if (dev != local->mdev) { |
| 263 | struct sk_buff *skb; |
| 264 | while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) { |
| 265 | local->total_ps_buffered--; |
| 266 | dev_kfree_skb(skb); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | break; |
| 271 | } |
| 272 | case IEEE80211_IF_TYPE_WDS: |
| 273 | sta = sta_info_get(local, sdata->u.wds.remote_addr); |
| 274 | if (sta) { |
| 275 | sta_info_put(sta); |
| 276 | sta_info_free(sta, 0); |
| 277 | } else { |
| 278 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 279 | printk(KERN_DEBUG "%s: Someone had deleted my STA " |
| 280 | "entry for the WDS link\n", dev->name); |
| 281 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 282 | } |
| 283 | break; |
| 284 | case IEEE80211_IF_TYPE_STA: |
| 285 | case IEEE80211_IF_TYPE_IBSS: |
| 286 | kfree(sdata->u.sta.extra_ie); |
| 287 | sdata->u.sta.extra_ie = NULL; |
| 288 | kfree(sdata->u.sta.assocreq_ies); |
| 289 | sdata->u.sta.assocreq_ies = NULL; |
| 290 | kfree(sdata->u.sta.assocresp_ies); |
| 291 | sdata->u.sta.assocresp_ies = NULL; |
| 292 | if (sdata->u.sta.probe_resp) { |
| 293 | dev_kfree_skb(sdata->u.sta.probe_resp); |
| 294 | sdata->u.sta.probe_resp = NULL; |
| 295 | } |
| 296 | |
| 297 | break; |
| 298 | case IEEE80211_IF_TYPE_MNTR: |
| 299 | dev->type = ARPHRD_ETHER; |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | /* remove all STAs that are bound to this virtual interface */ |
| 304 | sta_info_flush(local, dev); |
| 305 | |
| 306 | memset(&sdata->u, 0, sizeof(sdata->u)); |
| 307 | ieee80211_if_sdata_init(sdata); |
| 308 | } |
| 309 | |
| 310 | /* Must be called with rtnl lock held. */ |
| 311 | void __ieee80211_if_del(struct ieee80211_local *local, |
| 312 | struct ieee80211_sub_if_data *sdata) |
| 313 | { |
| 314 | struct net_device *dev = sdata->dev; |
| 315 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 316 | ieee80211_debugfs_remove_netdev(sdata); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 317 | unregister_netdevice(dev); |
| 318 | /* Except master interface, the net_device will be freed by |
| 319 | * net_device->destructor (i. e. ieee80211_if_free). */ |
| 320 | } |
| 321 | |
| 322 | /* Must be called with rtnl lock held. */ |
| 323 | int ieee80211_if_remove(struct net_device *dev, const char *name, int id) |
| 324 | { |
| 325 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 326 | struct ieee80211_sub_if_data *sdata, *n; |
| 327 | |
| 328 | ASSERT_RTNL(); |
| 329 | |
| 330 | write_lock_bh(&local->sub_if_lock); |
| 331 | list_for_each_entry_safe(sdata, n, &local->sub_if_list, list) { |
| 332 | if ((sdata->type == id || id == -1) && |
| 333 | strcmp(name, sdata->dev->name) == 0 && |
| 334 | sdata->dev != local->mdev) { |
| 335 | list_del(&sdata->list); |
| 336 | write_unlock_bh(&local->sub_if_lock); |
| 337 | __ieee80211_if_del(local, sdata); |
| 338 | ieee80211_update_default_wep_only(local); |
| 339 | return 0; |
| 340 | } |
| 341 | } |
| 342 | write_unlock_bh(&local->sub_if_lock); |
| 343 | return -ENODEV; |
| 344 | } |
| 345 | |
| 346 | void ieee80211_if_free(struct net_device *dev) |
| 347 | { |
| 348 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 349 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 350 | |
| 351 | /* local->apdev must be NULL when freeing management interface */ |
| 352 | BUG_ON(dev == local->apdev); |
| 353 | ieee80211_if_sdata_deinit(sdata); |
| 354 | free_netdev(dev); |
| 355 | } |