linux/net/wireless/core.h
<<
>>
Prefs
   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/mutex.h>
   9#include <linux/list.h>
  10#include <linux/netdevice.h>
  11#include <linux/kref.h>
  12#include <linux/rbtree.h>
  13#include <linux/debugfs.h>
  14#include <linux/rfkill.h>
  15#include <linux/workqueue.h>
  16#include <linux/rtnetlink.h>
  17#include <net/genetlink.h>
  18#include <net/cfg80211.h>
  19#include "reg.h"
  20
  21struct cfg80211_registered_device {
  22        const struct cfg80211_ops *ops;
  23        struct list_head list;
  24        /* we hold this mutex during any call so that
  25         * we cannot do multiple calls at once, and also
  26         * to avoid the deregister call to proceed while
  27         * any call is in progress */
  28        struct mutex mtx;
  29
  30        /* rfkill support */
  31        struct rfkill_ops rfkill_ops;
  32        struct rfkill *rfkill;
  33        struct work_struct rfkill_sync;
  34
  35        /* ISO / IEC 3166 alpha2 for which this device is receiving
  36         * country IEs on, this can help disregard country IEs from APs
  37         * on the same alpha2 quickly. The alpha2 may differ from
  38         * cfg80211_regdomain's alpha2 when an intersection has occurred.
  39         * If the AP is reconfigured this can also be used to tell us if
  40         * the country on the country IE changed. */
  41        char country_ie_alpha2[2];
  42
  43        /* If a Country IE has been received this tells us the environment
  44         * which its telling us its in. This defaults to ENVIRON_ANY */
  45        enum environment_cap env;
  46
  47        /* wiphy index, internal only */
  48        int wiphy_idx;
  49
  50        /* associated wireless interfaces */
  51        struct mutex devlist_mtx;
  52        /* protected by devlist_mtx or RCU */
  53        struct list_head wdev_list;
  54        int devlist_generation, wdev_id;
  55        int opencount; /* also protected by devlist_mtx */
  56        wait_queue_head_t dev_wait;
  57
  58        u32 ap_beacons_nlpid;
  59
  60        /* protected by RTNL only */
  61        int num_running_ifaces;
  62        int num_running_monitor_ifaces;
  63
  64        /* BSSes/scanning */
  65        spinlock_t bss_lock;
  66        struct list_head bss_list;
  67        struct rb_root bss_tree;
  68        u32 bss_generation;
  69        struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  70        struct cfg80211_sched_scan_request *sched_scan_req;
  71        unsigned long suspend_at;
  72        struct work_struct scan_done_wk;
  73        struct work_struct sched_scan_results_wk;
  74
  75        struct mutex sched_scan_mtx;
  76
  77#ifdef CONFIG_NL80211_TESTMODE
  78        struct genl_info *testmode_info;
  79#endif
  80
  81        struct work_struct conn_work;
  82        struct work_struct event_work;
  83
  84        struct cfg80211_wowlan *wowlan;
  85
  86        /* must be last because of the way we do wiphy_priv(),
  87         * and it should at least be aligned to NETDEV_ALIGN */
  88        struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
  89};
  90
  91static inline
  92struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
  93{
  94        BUG_ON(!wiphy);
  95        return container_of(wiphy, struct cfg80211_registered_device, wiphy);
  96}
  97
  98/* Note 0 is valid, hence phy0 */
  99static inline
 100bool wiphy_idx_valid(int wiphy_idx)
 101{
 102        return wiphy_idx >= 0;
 103}
 104
 105static inline void
 106cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 107{
 108        int i;
 109
 110        if (!rdev->wowlan)
 111                return;
 112        for (i = 0; i < rdev->wowlan->n_patterns; i++)
 113                kfree(rdev->wowlan->patterns[i].mask);
 114        kfree(rdev->wowlan->patterns);
 115        kfree(rdev->wowlan);
 116}
 117
 118extern struct workqueue_struct *cfg80211_wq;
 119extern struct mutex cfg80211_mutex;
 120extern struct list_head cfg80211_rdev_list;
 121extern int cfg80211_rdev_list_generation;
 122
 123static inline void assert_cfg80211_lock(void)
 124{
 125        lockdep_assert_held(&cfg80211_mutex);
 126}
 127
 128/*
 129 * You can use this to mark a wiphy_idx as not having an associated wiphy.
 130 * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
 131 */
 132#define WIPHY_IDX_STALE -1
 133
 134struct cfg80211_internal_bss {
 135        struct list_head list;
 136        struct rb_node rbn;
 137        unsigned long ts;
 138        struct kref ref;
 139        atomic_t hold;
 140        bool beacon_ies_allocated;
 141        bool proberesp_ies_allocated;
 142
 143        /* must be last because of priv member */
 144        struct cfg80211_bss pub;
 145};
 146
 147static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 148{
 149        return container_of(pub, struct cfg80211_internal_bss, pub);
 150}
 151
 152static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 153{
 154        atomic_inc(&bss->hold);
 155}
 156
 157static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 158{
 159        int r = atomic_dec_return(&bss->hold);
 160        WARN_ON(r < 0);
 161}
 162
 163
 164struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 165int get_wiphy_idx(struct wiphy *wiphy);
 166
 167/* requires cfg80211_rdev_mutex to be held! */
 168struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 169
 170/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
 171extern struct cfg80211_registered_device *
 172cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);
 173
 174int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 175                          struct net *net);
 176
 177static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
 178{
 179        mutex_lock(&rdev->mtx);
 180}
 181
 182static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
 183{
 184        BUG_ON(IS_ERR(rdev) || !rdev);
 185        mutex_unlock(&rdev->mtx);
 186}
 187
 188static inline void wdev_lock(struct wireless_dev *wdev)
 189        __acquires(wdev)
 190{
 191        mutex_lock(&wdev->mtx);
 192        __acquire(wdev->mtx);
 193}
 194
 195static inline void wdev_unlock(struct wireless_dev *wdev)
 196        __releases(wdev)
 197{
 198        __release(wdev->mtx);
 199        mutex_unlock(&wdev->mtx);
 200}
 201
 202#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
 203#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 204
 205static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 206{
 207        ASSERT_RTNL();
 208
 209        return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 210               rdev->num_running_ifaces > 0;
 211}
 212
 213enum cfg80211_event_type {
 214        EVENT_CONNECT_RESULT,
 215        EVENT_ROAMED,
 216        EVENT_DISCONNECTED,
 217        EVENT_IBSS_JOINED,
 218};
 219
 220struct cfg80211_event {
 221        struct list_head list;
 222        enum cfg80211_event_type type;
 223
 224        union {
 225                struct {
 226                        u8 bssid[ETH_ALEN];
 227                        const u8 *req_ie;
 228                        const u8 *resp_ie;
 229                        size_t req_ie_len;
 230                        size_t resp_ie_len;
 231                        u16 status;
 232                } cr;
 233                struct {
 234                        const u8 *req_ie;
 235                        const u8 *resp_ie;
 236                        size_t req_ie_len;
 237                        size_t resp_ie_len;
 238                        struct cfg80211_bss *bss;
 239                } rm;
 240                struct {
 241                        const u8 *ie;
 242                        size_t ie_len;
 243                        u16 reason;
 244                } dc;
 245                struct {
 246                        u8 bssid[ETH_ALEN];
 247                } ij;
 248        };
 249};
 250
 251struct cfg80211_cached_keys {
 252        struct key_params params[6];
 253        u8 data[6][WLAN_MAX_KEY_LEN];
 254        int def, defmgmt;
 255};
 256
 257enum cfg80211_chan_mode {
 258        CHAN_MODE_UNDEFINED,
 259        CHAN_MODE_SHARED,
 260        CHAN_MODE_EXCLUSIVE,
 261};
 262
 263
 264/* free object */
 265extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 266
 267extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 268                               char *newname);
 269
 270void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 271
 272void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
 273void cfg80211_bss_age(struct cfg80211_registered_device *dev,
 274                      unsigned long age_secs);
 275
 276/* IBSS */
 277int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 278                         struct net_device *dev,
 279                         struct cfg80211_ibss_params *params,
 280                         struct cfg80211_cached_keys *connkeys);
 281int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 282                       struct net_device *dev,
 283                       struct cfg80211_ibss_params *params,
 284                       struct cfg80211_cached_keys *connkeys);
 285void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 286int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 287                          struct net_device *dev, bool nowext);
 288int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 289                        struct net_device *dev, bool nowext);
 290void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
 291int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 292                            struct wireless_dev *wdev);
 293
 294/* mesh */
 295extern const struct mesh_config default_mesh_config;
 296extern const struct mesh_setup default_mesh_setup;
 297int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 298                         struct net_device *dev,
 299                         struct mesh_setup *setup,
 300                         const struct mesh_config *conf);
 301int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 302                       struct net_device *dev,
 303                       struct mesh_setup *setup,
 304                       const struct mesh_config *conf);
 305int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 306                        struct net_device *dev);
 307int cfg80211_set_mesh_freq(struct cfg80211_registered_device *rdev,
 308                           struct wireless_dev *wdev, int freq,
 309                           enum nl80211_channel_type channel_type);
 310
 311/* AP */
 312int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 313                     struct net_device *dev);
 314
 315/* MLME */
 316int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 317                         struct net_device *dev,
 318                         struct ieee80211_channel *chan,
 319                         enum nl80211_auth_type auth_type,
 320                         const u8 *bssid,
 321                         const u8 *ssid, int ssid_len,
 322                         const u8 *ie, int ie_len,
 323                         const u8 *key, int key_len, int key_idx);
 324int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 325                       struct net_device *dev, struct ieee80211_channel *chan,
 326                       enum nl80211_auth_type auth_type, const u8 *bssid,
 327                       const u8 *ssid, int ssid_len,
 328                       const u8 *ie, int ie_len,
 329                       const u8 *key, int key_len, int key_idx);
 330int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 331                          struct net_device *dev,
 332                          struct ieee80211_channel *chan,
 333                          const u8 *bssid, const u8 *prev_bssid,
 334                          const u8 *ssid, int ssid_len,
 335                          const u8 *ie, int ie_len, bool use_mfp,
 336                          struct cfg80211_crypto_settings *crypt,
 337                          u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 338                          struct ieee80211_ht_cap *ht_capa_mask);
 339int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 340                        struct net_device *dev, struct ieee80211_channel *chan,
 341                        const u8 *bssid, const u8 *prev_bssid,
 342                        const u8 *ssid, int ssid_len,
 343                        const u8 *ie, int ie_len, bool use_mfp,
 344                        struct cfg80211_crypto_settings *crypt,
 345                        u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 346                        struct ieee80211_ht_cap *ht_capa_mask);
 347int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 348                           struct net_device *dev, const u8 *bssid,
 349                           const u8 *ie, int ie_len, u16 reason,
 350                           bool local_state_change);
 351int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 352                         struct net_device *dev, const u8 *bssid,
 353                         const u8 *ie, int ie_len, u16 reason,
 354                         bool local_state_change);
 355int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 356                           struct net_device *dev, const u8 *bssid,
 357                           const u8 *ie, int ie_len, u16 reason,
 358                           bool local_state_change);
 359void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 360                        struct net_device *dev);
 361void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 362                               const u8 *req_ie, size_t req_ie_len,
 363                               const u8 *resp_ie, size_t resp_ie_len,
 364                               u16 status, bool wextev,
 365                               struct cfg80211_bss *bss);
 366int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 367                                u16 frame_type, const u8 *match_data,
 368                                int match_len);
 369void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 370void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 371int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 372                          struct wireless_dev *wdev,
 373                          struct ieee80211_channel *chan, bool offchan,
 374                          enum nl80211_channel_type channel_type,
 375                          bool channel_type_valid, unsigned int wait,
 376                          const u8 *buf, size_t len, bool no_cck,
 377                          bool dont_wait_for_ack, u64 *cookie);
 378void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 379                               const struct ieee80211_ht_cap *ht_capa_mask);
 380
 381/* SME */
 382int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 383                       struct net_device *dev,
 384                       struct cfg80211_connect_params *connect,
 385                       struct cfg80211_cached_keys *connkeys,
 386                       const u8 *prev_bssid);
 387int cfg80211_connect(struct cfg80211_registered_device *rdev,
 388                     struct net_device *dev,
 389                     struct cfg80211_connect_params *connect,
 390                     struct cfg80211_cached_keys *connkeys);
 391int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 392                          struct net_device *dev, u16 reason,
 393                          bool wextev);
 394int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 395                        struct net_device *dev, u16 reason,
 396                        bool wextev);
 397void __cfg80211_roamed(struct wireless_dev *wdev,
 398                       struct cfg80211_bss *bss,
 399                       const u8 *req_ie, size_t req_ie_len,
 400                       const u8 *resp_ie, size_t resp_ie_len);
 401int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 402                              struct wireless_dev *wdev);
 403
 404void cfg80211_conn_work(struct work_struct *work);
 405void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
 406bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);
 407
 408/* internal helpers */
 409bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 410int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 411                                   struct key_params *params, int key_idx,
 412                                   bool pairwise, const u8 *mac_addr);
 413void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 414                             size_t ie_len, u16 reason, bool from_ap);
 415void cfg80211_sme_scan_done(struct net_device *dev);
 416void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
 417void cfg80211_sme_disassoc(struct net_device *dev,
 418                           struct cfg80211_internal_bss *bss);
 419void __cfg80211_scan_done(struct work_struct *wk);
 420void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
 421void __cfg80211_sched_scan_results(struct work_struct *wk);
 422int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 423                               bool driver_initiated);
 424void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 425int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 426                          struct net_device *dev, enum nl80211_iftype ntype,
 427                          u32 *flags, struct vif_params *params);
 428void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 429void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 430
 431int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 432                                 struct wireless_dev *wdev,
 433                                 enum nl80211_iftype iftype,
 434                                 struct ieee80211_channel *chan,
 435                                 enum cfg80211_chan_mode chanmode);
 436
 437static inline int
 438cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
 439                              struct wireless_dev *wdev,
 440                              enum nl80211_iftype iftype)
 441{
 442        return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
 443                                            CHAN_MODE_UNDEFINED);
 444}
 445
 446static inline int
 447cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
 448                           enum nl80211_iftype iftype)
 449{
 450        return cfg80211_can_change_interface(rdev, NULL, iftype);
 451}
 452
 453static inline int
 454cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
 455                      struct wireless_dev *wdev,
 456                      struct ieee80211_channel *chan,
 457                      enum cfg80211_chan_mode chanmode)
 458{
 459        return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
 460                                            chan, chanmode);
 461}
 462
 463void
 464cfg80211_get_chan_state(struct wireless_dev *wdev,
 465                        struct ieee80211_channel **chan,
 466                        enum cfg80211_chan_mode *chanmode);
 467
 468struct ieee80211_channel *
 469rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
 470                  int freq, enum nl80211_channel_type channel_type);
 471int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 472                                 int freq, enum nl80211_channel_type chantype);
 473
 474int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 475                           const u8 *rates, unsigned int n_rates,
 476                           u32 *mask);
 477
 478int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 479                                 u32 beacon_int);
 480
 481void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 482                               enum nl80211_iftype iftype, int num);
 483
 484#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 485
 486#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 487#define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 488#else
 489/*
 490 * Trick to enable using it as a condition,
 491 * and also not give a warning when it's
 492 * not used that way.
 493 */
 494#define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 495#endif
 496
 497#endif /* __NET_WIRELESS_CORE_H */
 498
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.