LXR linux/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
  22struct 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        /*
  40         * the driver requests the regulatory core to set this regulatory
  41         * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
  42         * devices using the regulatory_set_wiphy_regd() API
  43         */
  44        const struct ieee80211_regdomain *requested_regd;
  45
  46        /* If a Country IE has been received this tells us the environment
  47         * which its telling us its in. This defaults to ENVIRON_ANY */
  48        enum environment_cap env;
  49
  50        /* wiphy index, internal only */
  51        int wiphy_idx;
  52
  53        /* associated wireless interfaces, protected by rtnl or RCU */
  54        struct list_head wdev_list;
  55        int devlist_generation, wdev_id;
  56        int opencount; /* also protected by devlist_mtx */
  57        wait_queue_head_t dev_wait;
  58
  59        struct list_head beacon_registrations;
  60        spinlock_t beacon_registrations_lock;
  61
  62        struct list_head mlme_unreg;
  63        spinlock_t mlme_unreg_lock;
  64        struct work_struct mlme_unreg_wk;
  65
  66        /* protected by RTNL only */
  67        int num_running_ifaces;
  68        int num_running_monitor_ifaces;
  69
  70        /* BSSes/scanning */
  71        spinlock_t bss_lock;
  72        struct list_head bss_list;
  73        struct rb_root bss_tree;
  74        u32 bss_generation;
  75        struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  76        struct sk_buff *scan_msg;
  77        struct cfg80211_sched_scan_request __rcu *sched_scan_req;
  78        unsigned long suspend_at;
  79        struct work_struct scan_done_wk;
  80        struct work_struct sched_scan_results_wk;
  81
  82        struct genl_info *cur_cmd_info;
  83
  84        struct work_struct conn_work;
  85        struct work_struct event_work;
  86
  87        struct delayed_work dfs_update_channels_wk;
  88
  89        /* netlink port which started critical protocol (0 means not started) */
  90        u32 crit_proto_nlportid;
  91
  92        struct cfg80211_coalesce *coalesce;
  93
  94        spinlock_t destroy_list_lock;
  95        struct list_head destroy_list;
  96        struct work_struct destroy_work;
  97
  98        struct work_struct sched_scan_stop_wk;
  99
 100        /* must be last because of the way we do wiphy_priv(),
 101         * and it should at least be aligned to NETDEV_ALIGN */
 102        struct wiphy wiphy __aligned(NETDEV_ALIGN);
 103};
 104
 105static inline
 106struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 107{
 108        BUG_ON(!wiphy);
 109        return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 110}
 111
 112static inline void
 113cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 114{
 115#ifdef CONFIG_PM
 116        int i;
 117
 118        if (!rdev->wiphy.wowlan_config)
 119                return;
 120        for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 121                kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 122        kfree(rdev->wiphy.wowlan_config->patterns);
 123        if (rdev->wiphy.wowlan_config->tcp &&
 124            rdev->wiphy.wowlan_config->tcp->sock)
 125                sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 126        kfree(rdev->wiphy.wowlan_config->tcp);
 127        kfree(rdev->wiphy.wowlan_config->nd_config);
 128        kfree(rdev->wiphy.wowlan_config);
 129#endif
 130}
 131
 132extern struct workqueue_struct *cfg80211_wq;
 133extern struct list_head cfg80211_rdev_list;
 134extern int cfg80211_rdev_list_generation;
 135
 136struct cfg80211_internal_bss {
 137        struct list_head list;
 138        struct list_head hidden_list;
 139        struct rb_node rbn;
 140        unsigned long ts;
 141        unsigned long refcount;
 142        atomic_t hold;
 143
 144        /* must be last because of priv member */
 145        struct cfg80211_bss pub;
 146};
 147
 148static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 149{
 150        return container_of(pub, struct cfg80211_internal_bss, pub);
 151}
 152
 153static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 154{
 155        atomic_inc(&bss->hold);
 156}
 157
 158static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 159{
 160        int r = atomic_dec_return(&bss->hold);
 161        WARN_ON(r < 0);
 162}
 163
 164
 165struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 166int get_wiphy_idx(struct wiphy *wiphy);
 167
 168struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 169
 170int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 171                          struct net *net);
 172
 173static inline void wdev_lock(struct wireless_dev *wdev)
 174        __acquires(wdev)
 175{
 176        mutex_lock(&wdev->mtx);
 177        __acquire(wdev->mtx);
 178}
 179
 180static inline void wdev_unlock(struct wireless_dev *wdev)
 181        __releases(wdev)
 182{
 183        __release(wdev->mtx);
 184        mutex_unlock(&wdev->mtx);
 185}
 186
 187#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 188
 189static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 190{
 191        ASSERT_RTNL();
 192
 193        return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 194               rdev->num_running_ifaces > 0;
 195}
 196
 197enum cfg80211_event_type {
 198        EVENT_CONNECT_RESULT,
 199        EVENT_ROAMED,
 200        EVENT_DISCONNECTED,
 201        EVENT_IBSS_JOINED,
 202        EVENT_STOPPED,
 203};
 204
 205struct cfg80211_event {
 206        struct list_head list;
 207        enum cfg80211_event_type type;
 208
 209        union {
 210                struct {
 211                        u8 bssid[ETH_ALEN];
 212                        const u8 *req_ie;
 213                        const u8 *resp_ie;
 214                        size_t req_ie_len;
 215                        size_t resp_ie_len;
 216                        u16 status;
 217                } cr;
 218                struct {
 219                        const u8 *req_ie;
 220                        const u8 *resp_ie;
 221                        size_t req_ie_len;
 222                        size_t resp_ie_len;
 223                        struct cfg80211_bss *bss;
 224                } rm;
 225                struct {
 226                        const u8 *ie;
 227                        size_t ie_len;
 228                        u16 reason;
 229                        bool locally_generated;
 230                } dc;
 231                struct {
 232                        u8 bssid[ETH_ALEN];
 233                        struct ieee80211_channel *channel;
 234                } ij;
 235        };
 236};
 237
 238struct cfg80211_cached_keys {
 239        struct key_params params[6];
 240        u8 data[6][WLAN_MAX_KEY_LEN];
 241        int def, defmgmt;
 242};
 243
 244enum cfg80211_chan_mode {
 245        CHAN_MODE_UNDEFINED,
 246        CHAN_MODE_SHARED,
 247        CHAN_MODE_EXCLUSIVE,
 248};
 249
 250struct cfg80211_beacon_registration {
 251        struct list_head list;
 252        u32 nlportid;
 253};
 254
 255struct cfg80211_iface_destroy {
 256        struct list_head list;
 257        u32 nlportid;
 258};
 259
 260void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 261
 262/* free object */
 263void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 264
 265int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 266                        char *newname);
 267
 268void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 269
 270void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 271void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 272                      unsigned long age_secs);
 273
 274/* IBSS */
 275int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 276                       struct net_device *dev,
 277                       struct cfg80211_ibss_params *params,
 278                       struct cfg80211_cached_keys *connkeys);
 279void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 280int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 281                          struct net_device *dev, bool nowext);
 282int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 283                        struct net_device *dev, bool nowext);
 284void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 285                            struct ieee80211_channel *channel);
 286int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 287                            struct wireless_dev *wdev);
 288
 289/* mesh */
 290extern const struct mesh_config default_mesh_config;
 291extern const struct mesh_setup default_mesh_setup;
 292int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 293                         struct net_device *dev,
 294                         struct mesh_setup *setup,
 295                         const struct mesh_config *conf);
 296int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 297                       struct net_device *dev,
 298                       struct mesh_setup *setup,
 299                       const struct mesh_config *conf);
 300int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 301                          struct net_device *dev);
 302int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 303                        struct net_device *dev);
 304int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 305                              struct wireless_dev *wdev,
 306                              struct cfg80211_chan_def *chandef);
 307
 308/* OCB */
 309int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 310                        struct net_device *dev,
 311                        struct ocb_setup *setup);
 312int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 313                      struct net_device *dev,
 314                      struct ocb_setup *setup);
 315int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 316                         struct net_device *dev);
 317int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 318                       struct net_device *dev);
 319
 320/* AP */
 321int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 322                       struct net_device *dev, bool notify);
 323int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 324                     struct net_device *dev, bool notify);
 325
 326/* MLME */
 327int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 328                       struct net_device *dev,
 329                       struct ieee80211_channel *chan,
 330                       enum nl80211_auth_type auth_type,
 331                       const u8 *bssid,
 332                       const u8 *ssid, int ssid_len,
 333                       const u8 *ie, int ie_len,
 334                       const u8 *key, int key_len, int key_idx,
 335                       const u8 *sae_data, int sae_data_len);
 336int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 337                        struct net_device *dev,
 338                        struct ieee80211_channel *chan,
 339                        const u8 *bssid,
 340                        const u8 *ssid, int ssid_len,
 341                        struct cfg80211_assoc_request *req);
 342int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 343                         struct net_device *dev, const u8 *bssid,
 344                         const u8 *ie, int ie_len, u16 reason,
 345                         bool local_state_change);
 346int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 347                           struct net_device *dev, const u8 *bssid,
 348                           const u8 *ie, int ie_len, u16 reason,
 349                           bool local_state_change);
 350void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 351                        struct net_device *dev);
 352int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 353                                u16 frame_type, const u8 *match_data,
 354                                int match_len);
 355void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 356void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 357void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 358int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 359                          struct wireless_dev *wdev,
 360                          struct cfg80211_mgmt_tx_params *params,
 361                          u64 *cookie);
 362void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 363                               const struct ieee80211_ht_cap *ht_capa_mask);
 364void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 365                                const struct ieee80211_vht_cap *vht_capa_mask);
 366
 367/* SME events */
 368int cfg80211_connect(struct cfg80211_registered_device *rdev,
 369                     struct net_device *dev,
 370                     struct cfg80211_connect_params *connect,
 371                     struct cfg80211_cached_keys *connkeys,
 372                     const u8 *prev_bssid);
 373void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 374                               const u8 *req_ie, size_t req_ie_len,
 375                               const u8 *resp_ie, size_t resp_ie_len,
 376                               u16 status, bool wextev,
 377                               struct cfg80211_bss *bss);
 378void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 379                             size_t ie_len, u16 reason, bool from_ap);
 380int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 381                        struct net_device *dev, u16 reason,
 382                        bool wextev);
 383void __cfg80211_roamed(struct wireless_dev *wdev,
 384                       struct cfg80211_bss *bss,
 385                       const u8 *req_ie, size_t req_ie_len,
 386                       const u8 *resp_ie, size_t resp_ie_len);
 387int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 388                              struct wireless_dev *wdev);
 389
 390/* SME implementation */
 391void cfg80211_conn_work(struct work_struct *work);
 392void cfg80211_sme_scan_done(struct net_device *dev);
 393bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 394void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 395void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 396void cfg80211_sme_deauth(struct wireless_dev *wdev);
 397void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 398void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 399
 400/* internal helpers */
 401bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 402int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 403                                   struct key_params *params, int key_idx,
 404                                   bool pairwise, const u8 *mac_addr);
 405void __cfg80211_scan_done(struct work_struct *wk);
 406void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 407                           bool send_message);
 408void __cfg80211_sched_scan_results(struct work_struct *wk);
 409int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 410                               bool driver_initiated);
 411void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 412int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 413                          struct net_device *dev, enum nl80211_iftype ntype,
 414                          u32 *flags, struct vif_params *params);
 415void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 416void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 417
 418int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 419                                 struct wireless_dev *wdev,
 420                                 enum nl80211_iftype iftype,
 421                                 struct ieee80211_channel *chan,
 422                                 enum cfg80211_chan_mode chanmode,
 423                                 u8 radar_detect);
 424
 425/**
 426 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 427 * @wiphy: the wiphy to validate against
 428 * @chandef: the channel definition to check
 429 *
 430 * Checks if chandef is usable and we can/need start CAC on such channel.
 431 *
 432 * Return: Return true if all channels available and at least
 433 *         one channel require CAC (NL80211_DFS_USABLE)
 434 */
 435bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 436                                 const struct cfg80211_chan_def *chandef);
 437
 438void cfg80211_set_dfs_state(struct wiphy *wiphy,
 439                            const struct cfg80211_chan_def *chandef,
 440                            enum nl80211_dfs_state dfs_state);
 441
 442void cfg80211_dfs_channels_update_work(struct work_struct *work);
 443
 444unsigned int
 445cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 446                              const struct cfg80211_chan_def *chandef);
 447
 448static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 449{
 450        unsigned long end = jiffies;
 451
 452        if (end >= start)
 453                return jiffies_to_msecs(end - start);
 454
 455        return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 456}
 457
 458void
 459cfg80211_get_chan_state(struct wireless_dev *wdev,
 460                        struct ieee80211_channel **chan,
 461                        enum cfg80211_chan_mode *chanmode,
 462                        u8 *radar_detect);
 463
 464int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 465                                 struct cfg80211_chan_def *chandef);
 466
 467int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 468                           const u8 *rates, unsigned int n_rates,
 469                           u32 *mask);
 470
 471int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 472                                 u32 beacon_int);
 473
 474void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 475                               enum nl80211_iftype iftype, int num);
 476
 477void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 478                      struct wireless_dev *wdev);
 479void cfg80211_leave(struct cfg80211_registered_device *rdev,
 480                    struct wireless_dev *wdev);
 481
 482void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 483                              struct wireless_dev *wdev);
 484
 485#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10
 486
 487#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 488#define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 489#else
 490/*
 491 * Trick to enable using it as a condition,
 492 * and also not give a warning when it's
 493 * not used that way.
 494 */
 495#define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 496#endif
 497
 498#endif /* __NET_WIRELESS_CORE_H */
 499