net/wireless/core.h

   1 /*
   2  * Wireless configuration interface internals.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6 #ifndef __NET_WIRELESS_CORE_H
   7 #define __NET_WIRELESS_CORE_H
   8 #include <linux/list.h>
   9 #include <linux/netdevice.h>
  10 #include <linux/rbtree.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/rfkill.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/rtnetlink.h>
  15 #include <net/genetlink.h>
  16 #include <net/cfg80211.h>
  17 #include "reg.h"
  18
  19
  20 #define WIPHY_IDX_INVALID       -1
  21
  22 struct cfg80211_registered_device {
  23         const struct cfg80211_ops *ops;
  24         struct list_head list;
  25
  26         /* rfkill support */
  27         struct rfkill_ops rfkill_ops;
  28         struct rfkill *rfkill;
  29         struct work_struct rfkill_sync;
  30
  31         /* ISO / IEC 3166 alpha2 for which this device is receiving
  32          * country IEs on, this can help disregard country IEs from APs
  33          * on the same alpha2 quickly. The alpha2 may differ from
  34          * cfg80211_regdomain's alpha2 when an intersection has occurred.
  35          * If the AP is reconfigured this can also be used to tell us if
  36          * the country on the country IE changed. */
  37         char country_ie_alpha2[2];
  38
  39         /* If a Country IE has been received this tells us the environment
  40          * which its telling us its in. This defaults to ENVIRON_ANY */
  41         enum environment_cap env;
  42
  43         /* wiphy index, internal only */
  44         int wiphy_idx;
  45
  46         /* associated wireless interfaces, protected by rtnl or RCU */
  47         struct list_head wdev_list;
  48         int devlist_generation, wdev_id;
  49         int opencount; /* also protected by devlist_mtx */
  50         wait_queue_head_t dev_wait;
  51
  52         struct list_head beacon_registrations;
  53         spinlock_t beacon_registrations_lock;
  54
  55         /* protected by RTNL only */
  56         int num_running_ifaces;
  57         int num_running_monitor_ifaces;
  58
  59         /* BSSes/scanning */
  60         spinlock_t bss_lock;
  61         struct list_head bss_list;
  62         struct rb_root bss_tree;
  63         u32 bss_generation;
  64         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  65         struct sk_buff *scan_msg;
  66         struct cfg80211_sched_scan_request *sched_scan_req;
  67         unsigned long suspend_at;
  68         struct work_struct scan_done_wk;
  69         struct work_struct sched_scan_results_wk;
  70
  71         struct genl_info *cur_cmd_info;
  72
  73         struct work_struct conn_work;
  74         struct work_struct event_work;
  75
  76         struct delayed_work dfs_update_channels_wk;
  77
  78         /* netlink port which started critical protocol (0 means not started) */
  79         u32 crit_proto_nlportid;
  80
  81         struct cfg80211_coalesce *coalesce;
  82
  83         spinlock_t destroy_list_lock;
  84         struct list_head destroy_list;
  85         struct work_struct destroy_work;
  86
  87         /* must be last because of the way we do wiphy_priv(),
  88          * and it should at least be aligned to NETDEV_ALIGN */
  89         struct wiphy wiphy __aligned(NETDEV_ALIGN);
  90 };
  91
  92 static inline
  93 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
  94 {
  95         BUG_ON(!wiphy);
  96         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
  97 }
  98
  99 static inline void
 100 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 101 {
 102 #ifdef CONFIG_PM
 103         int i;
 104
 105         if (!rdev->wiphy.wowlan_config)
 106                 return;
 107         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 108                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 109         kfree(rdev->wiphy.wowlan_config->patterns);
 110         if (rdev->wiphy.wowlan_config->tcp &&
 111             rdev->wiphy.wowlan_config->tcp->sock)
 112                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 113         kfree(rdev->wiphy.wowlan_config->tcp);
 114         kfree(rdev->wiphy.wowlan_config->nd_config);
 115         kfree(rdev->wiphy.wowlan_config);
 116 #endif
 117 }
 118
 119 extern struct workqueue_struct *cfg80211_wq;
 120 extern struct list_head cfg80211_rdev_list;
 121 extern int cfg80211_rdev_list_generation;
 122
 123 struct cfg80211_internal_bss {
 124         struct list_head list;
 125         struct list_head hidden_list;
 126         struct rb_node rbn;
 127         unsigned long ts;
 128         unsigned long refcount;
 129         atomic_t hold;
 130
 131         /* must be last because of priv member */
 132         struct cfg80211_bss pub;
 133 };
 134
 135 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 136 {
 137         return container_of(pub, struct cfg80211_internal_bss, pub);
 138 }
 139
 140 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 141 {
 142         atomic_inc(&bss->hold);
 143 }
 144
 145 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 146 {
 147         int r = atomic_dec_return(&bss->hold);
 148         WARN_ON(r < 0);
 149 }
 150
 151
 152 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 153 int get_wiphy_idx(struct wiphy *wiphy);
 154
 155 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 156
 157 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 158                           struct net *net);
 159
 160 static inline void wdev_lock(struct wireless_dev *wdev)
 161         __acquires(wdev)
 162 {
 163         mutex_lock(&wdev->mtx);
 164         __acquire(wdev->mtx);
 165 }
 166
 167 static inline void wdev_unlock(struct wireless_dev *wdev)
 168         __releases(wdev)
 169 {
 170         __release(wdev->mtx);
 171         mutex_unlock(&wdev->mtx);
 172 }
 173
 174 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 175
 176 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 177 {
 178         ASSERT_RTNL();
 179
 180         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 181                rdev->num_running_ifaces > 0;
 182 }
 183
 184 enum cfg80211_event_type {
 185         EVENT_CONNECT_RESULT,
 186         EVENT_ROAMED,
 187         EVENT_DISCONNECTED,
 188         EVENT_IBSS_JOINED,
 189         EVENT_STOPPED,
 190 };
 191
 192 struct cfg80211_event {
 193         struct list_head list;
 194         enum cfg80211_event_type type;
 195
 196         union {
 197                 struct {
 198                         u8 bssid[ETH_ALEN];
 199                         const u8 *req_ie;
 200                         const u8 *resp_ie;
 201                         size_t req_ie_len;
 202                         size_t resp_ie_len;
 203                         u16 status;
 204                 } cr;
 205                 struct {
 206                         const u8 *req_ie;
 207                         const u8 *resp_ie;
 208                         size_t req_ie_len;
 209                         size_t resp_ie_len;
 210                         struct cfg80211_bss *bss;
 211                 } rm;
 212                 struct {
 213                         const u8 *ie;
 214                         size_t ie_len;
 215                         u16 reason;
 216                 } dc;
 217                 struct {
 218                         u8 bssid[ETH_ALEN];
 219                         struct ieee80211_channel *channel;
 220                 } ij;
 221         };
 222 };
 223
 224 struct cfg80211_cached_keys {
 225         struct key_params params[6];
 226         u8 data[6][WLAN_MAX_KEY_LEN];
 227         int def, defmgmt;
 228 };
 229
 230 enum cfg80211_chan_mode {
 231         CHAN_MODE_UNDEFINED,
 232         CHAN_MODE_SHARED,
 233         CHAN_MODE_EXCLUSIVE,
 234 };
 235
 236 struct cfg80211_beacon_registration {
 237         struct list_head list;
 238         u32 nlportid;
 239 };
 240
 241 struct cfg80211_iface_destroy {
 242         struct list_head list;
 243         u32 nlportid;
 244 };
 245
 246 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 247
 248 /* free object */
 249 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 250
 251 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 252                         char *newname);
 253
 254 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 255
 256 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 257 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 258                       unsigned long age_secs);
 259
 260 /* IBSS */
 261 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 262                        struct net_device *dev,
 263                        struct cfg80211_ibss_params *params,
 264                        struct cfg80211_cached_keys *connkeys);
 265 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 266 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 267                           struct net_device *dev, bool nowext);
 268 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 269                         struct net_device *dev, bool nowext);
 270 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 271                             struct ieee80211_channel *channel);
 272 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 273                             struct wireless_dev *wdev);
 274
 275 /* mesh */
 276 extern const struct mesh_config default_mesh_config;
 277 extern const struct mesh_setup default_mesh_setup;
 278 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 279                          struct net_device *dev,
 280                          struct mesh_setup *setup,
 281                          const struct mesh_config *conf);
 282 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 283                        struct net_device *dev,
 284                        struct mesh_setup *setup,
 285                        const struct mesh_config *conf);
 286 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 287                           struct net_device *dev);
 288 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 289                         struct net_device *dev);
 290 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 291                               struct wireless_dev *wdev,
 292                               struct cfg80211_chan_def *chandef);
 293
 294 /* OCB */
 295 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 296                         struct net_device *dev,
 297                         struct ocb_setup *setup);
 298 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 299                       struct net_device *dev,
 300                       struct ocb_setup *setup);
 301 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 302                          struct net_device *dev);
 303 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 304                        struct net_device *dev);
 305
 306 /* AP */
 307 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 308                        struct net_device *dev, bool notify);
 309 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 310                      struct net_device *dev, bool notify);
 311
 312 /* MLME */
 313 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 314                        struct net_device *dev,
 315                        struct ieee80211_channel *chan,
 316                        enum nl80211_auth_type auth_type,
 317                        const u8 *bssid,
 318                        const u8 *ssid, int ssid_len,
 319                        const u8 *ie, int ie_len,
 320                        const u8 *key, int key_len, int key_idx,
 321                        const u8 *sae_data, int sae_data_len);
 322 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 323                         struct net_device *dev,
 324                         struct ieee80211_channel *chan,
 325                         const u8 *bssid,
 326                         const u8 *ssid, int ssid_len,
 327                         struct cfg80211_assoc_request *req);
 328 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 329                          struct net_device *dev, const u8 *bssid,
 330                          const u8 *ie, int ie_len, u16 reason,
 331                          bool local_state_change);
 332 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 333                            struct net_device *dev, const u8 *bssid,
 334                            const u8 *ie, int ie_len, u16 reason,
 335                            bool local_state_change);
 336 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 337                         struct net_device *dev);
 338 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 339                                 u16 frame_type, const u8 *match_data,
 340                                 int match_len);
 341 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 342 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 343 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 344                           struct wireless_dev *wdev,
 345                           struct cfg80211_mgmt_tx_params *params,
 346                           u64 *cookie);
 347 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 348                                const struct ieee80211_ht_cap *ht_capa_mask);
 349 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 350                                 const struct ieee80211_vht_cap *vht_capa_mask);
 351
 352 /* SME events */
 353 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 354                      struct net_device *dev,
 355                      struct cfg80211_connect_params *connect,
 356                      struct cfg80211_cached_keys *connkeys,
 357                      const u8 *prev_bssid);
 358 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 359                                const u8 *req_ie, size_t req_ie_len,
 360                                const u8 *resp_ie, size_t resp_ie_len,
 361                                u16 status, bool wextev,
 362                                struct cfg80211_bss *bss);
 363 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 364                              size_t ie_len, u16 reason, bool from_ap);
 365 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 366                         struct net_device *dev, u16 reason,
 367                         bool wextev);
 368 void __cfg80211_roamed(struct wireless_dev *wdev,
 369                        struct cfg80211_bss *bss,
 370                        const u8 *req_ie, size_t req_ie_len,
 371                        const u8 *resp_ie, size_t resp_ie_len);
 372 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 373                               struct wireless_dev *wdev);
 374
 375 /* SME implementation */
 376 void cfg80211_conn_work(struct work_struct *work);
 377 void cfg80211_sme_scan_done(struct net_device *dev);
 378 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 379 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 380 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 381 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 382 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 383 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 384
 385 /* internal helpers */
 386 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 387 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 388                                    struct key_params *params, int key_idx,
 389                                    bool pairwise, const u8 *mac_addr);
 390 void __cfg80211_scan_done(struct work_struct *wk);
 391 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 392                            bool send_message);
 393 void __cfg80211_sched_scan_results(struct work_struct *wk);
 394 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 395                                bool driver_initiated);
 396 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 397 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 398                           struct net_device *dev, enum nl80211_iftype ntype,
 399                           u32 *flags, struct vif_params *params);
 400 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 401 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 402
 403 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 404                                  struct wireless_dev *wdev,
 405                                  enum nl80211_iftype iftype,
 406                                  struct ieee80211_channel *chan,
 407                                  enum cfg80211_chan_mode chanmode,
 408                                  u8 radar_detect);
 409
 410 /**
 411  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 412  * @wiphy: the wiphy to validate against
 413  * @chandef: the channel definition to check
 414  *
 415  * Checks if chandef is usable and we can/need start CAC on such channel.
 416  *
 417  * Return: Return true if all channels available and at least
 418  *         one channel require CAC (NL80211_DFS_USABLE)
 419  */
 420 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 421                                  const struct cfg80211_chan_def *chandef);
 422
 423 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 424                             const struct cfg80211_chan_def *chandef,
 425                             enum nl80211_dfs_state dfs_state);
 426
 427 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 428
 429 unsigned int
 430 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 431                               const struct cfg80211_chan_def *chandef);
 432
 433 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 434 {
 435         unsigned long end = jiffies;
 436
 437         if (end >= start)
 438                 return jiffies_to_msecs(end - start);
 439
 440         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 441 }
 442
 443 void
 444 cfg80211_get_chan_state(struct wireless_dev *wdev,
 445                         struct ieee80211_channel **chan,
 446                         enum cfg80211_chan_mode *chanmode,
 447                         u8 *radar_detect);
 448
 449 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 450                                  struct cfg80211_chan_def *chandef);
 451
 452 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 453                            const u8 *rates, unsigned int n_rates,
 454                            u32 *mask);
 455
 456 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 457                                  u32 beacon_int);
 458
 459 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 460                                enum nl80211_iftype iftype, int num);
 461
 462 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 463                       struct wireless_dev *wdev);
 464 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 465                     struct wireless_dev *wdev);
 466
 467 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 468                               struct wireless_dev *wdev);
 469
 470 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 471
 472 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 473 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 474 #else
 475 /*
 476  * Trick to enable using it as a condition,
 477  * and also not give a warning when it's
 478  * not used that way.
 479  */
 480 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 481 #endif
 482
 483 #endif /* __NET_WIRELESS_CORE_H */