net/wireless/core.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Wireless configuration interface internals.
   4  *
   5  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright (C) 2018-2019 Intel Corporation
   7  */
   8 #ifndef __NET_WIRELESS_CORE_H
   9 #define __NET_WIRELESS_CORE_H
  10 #include <linux/list.h>
  11 #include <linux/netdevice.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
  21
  22 #define WIPHY_IDX_INVALID       -1
  23
  24 struct cfg80211_registered_device {
  25         const struct cfg80211_ops *ops;
  26         struct list_head list;
  27
  28         /* rfkill support */
  29         struct rfkill_ops rfkill_ops;
  30         struct rfkill *rfkill;
  31         struct work_struct rfkill_block;
  32
  33         /* ISO / IEC 3166 alpha2 for which this device is receiving
  34          * country IEs on, this can help disregard country IEs from APs
  35          * on the same alpha2 quickly. The alpha2 may differ from
  36          * cfg80211_regdomain's alpha2 when an intersection has occurred.
  37          * If the AP is reconfigured this can also be used to tell us if
  38          * the country on the country IE changed. */
  39         char country_ie_alpha2[2];
  40
  41         /*
  42          * the driver requests the regulatory core to set this regulatory
  43          * domain as the wiphy's. Only used for %REGULATORY_WIPHY_SELF_MANAGED
  44          * devices using the regulatory_set_wiphy_regd() API
  45          */
  46         const struct ieee80211_regdomain *requested_regd;
  47
  48         /* If a Country IE has been received this tells us the environment
  49          * which its telling us its in. This defaults to ENVIRON_ANY */
  50         enum environment_cap env;
  51
  52         /* wiphy index, internal only */
  53         int wiphy_idx;
  54
  55         /* protected by RTNL */
  56         int devlist_generation, wdev_id;
  57         int opencount;
  58         wait_queue_head_t dev_wait;
  59
  60         struct list_head beacon_registrations;
  61         spinlock_t beacon_registrations_lock;
  62
  63         struct list_head mlme_unreg;
  64         spinlock_t mlme_unreg_lock;
  65         struct work_struct mlme_unreg_wk;
  66
  67         /* protected by RTNL only */
  68         int num_running_ifaces;
  69         int num_running_monitor_ifaces;
  70         u64 cookie_counter;
  71
  72         /* BSSes/scanning */
  73         spinlock_t bss_lock;
  74         struct list_head bss_list;
  75         struct rb_root bss_tree;
  76         u32 bss_generation;
  77         u32 bss_entries;
  78         struct cfg80211_scan_request *scan_req; /* protected by RTNL */
  79         struct sk_buff *scan_msg;
  80         struct list_head sched_scan_req_list;
  81         time64_t suspend_at;
  82         struct work_struct scan_done_wk;
  83
  84         struct genl_info *cur_cmd_info;
  85
  86         struct work_struct conn_work;
  87         struct work_struct event_work;
  88
  89         struct delayed_work dfs_update_channels_wk;
  90
  91         /* netlink port which started critical protocol (0 means not started) */
  92         u32 crit_proto_nlportid;
  93
  94         struct cfg80211_coalesce *coalesce;
  95
  96         struct work_struct destroy_work;
  97         struct work_struct sched_scan_stop_wk;
  98         struct work_struct sched_scan_res_wk;
  99
 100         struct cfg80211_chan_def radar_chandef;
 101         struct work_struct propagate_radar_detect_wk;
 102
 103         struct cfg80211_chan_def cac_done_chandef;
 104         struct work_struct propagate_cac_done_wk;
 105
 106         /* must be last because of the way we do wiphy_priv(),
 107          * and it should at least be aligned to NETDEV_ALIGN */
 108         struct wiphy wiphy __aligned(NETDEV_ALIGN);
 109 };
 110
 111 static inline
 112 struct cfg80211_registered_device *wiphy_to_rdev(struct wiphy *wiphy)
 113 {
 114         BUG_ON(!wiphy);
 115         return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 116 }
 117
 118 static inline void
 119 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 120 {
 121 #ifdef CONFIG_PM
 122         int i;
 123
 124         if (!rdev->wiphy.wowlan_config)
 125                 return;
 126         for (i = 0; i < rdev->wiphy.wowlan_config->n_patterns; i++)
 127                 kfree(rdev->wiphy.wowlan_config->patterns[i].mask);
 128         kfree(rdev->wiphy.wowlan_config->patterns);
 129         if (rdev->wiphy.wowlan_config->tcp &&
 130             rdev->wiphy.wowlan_config->tcp->sock)
 131                 sock_release(rdev->wiphy.wowlan_config->tcp->sock);
 132         kfree(rdev->wiphy.wowlan_config->tcp);
 133         kfree(rdev->wiphy.wowlan_config->nd_config);
 134         kfree(rdev->wiphy.wowlan_config);
 135 #endif
 136 }
 137
 138 static inline u64 cfg80211_assign_cookie(struct cfg80211_registered_device *rdev)
 139 {
 140         u64 r = ++rdev->cookie_counter;
 141
 142         if (WARN_ON(r == 0))
 143                 r = ++rdev->cookie_counter;
 144
 145         return r;
 146 }
 147
 148 extern struct workqueue_struct *cfg80211_wq;
 149 extern struct list_head cfg80211_rdev_list;
 150 extern int cfg80211_rdev_list_generation;
 151
 152 struct cfg80211_internal_bss {
 153         struct list_head list;
 154         struct list_head hidden_list;
 155         struct rb_node rbn;
 156         u64 ts_boottime;
 157         unsigned long ts;
 158         unsigned long refcount;
 159         atomic_t hold;
 160
 161         /* time at the start of the reception of the first octet of the
 162          * timestamp field of the last beacon/probe received for this BSS.
 163          * The time is the TSF of the BSS specified by %parent_bssid.
 164          */
 165         u64 parent_tsf;
 166
 167         /* the BSS according to which %parent_tsf is set. This is set to
 168          * the BSS that the interface that requested the scan was connected to
 169          * when the beacon/probe was received.
 170          */
 171         u8 parent_bssid[ETH_ALEN] __aligned(2);
 172
 173         /* must be last because of priv member */
 174         struct cfg80211_bss pub;
 175 };
 176
 177 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 178 {
 179         return container_of(pub, struct cfg80211_internal_bss, pub);
 180 }
 181
 182 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 183 {
 184         atomic_inc(&bss->hold);
 185         if (bss->pub.transmitted_bss) {
 186                 bss = container_of(bss->pub.transmitted_bss,
 187                                    struct cfg80211_internal_bss, pub);
 188                 atomic_inc(&bss->hold);
 189         }
 190 }
 191
 192 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 193 {
 194         int r = atomic_dec_return(&bss->hold);
 195         WARN_ON(r < 0);
 196         if (bss->pub.transmitted_bss) {
 197                 bss = container_of(bss->pub.transmitted_bss,
 198                                    struct cfg80211_internal_bss, pub);
 199                 r = atomic_dec_return(&bss->hold);
 200                 WARN_ON(r < 0);
 201         }
 202 }
 203
 204
 205 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 206 int get_wiphy_idx(struct wiphy *wiphy);
 207
 208 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
 209
 210 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 211                           struct net *net);
 212
 213 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
 214                         struct wireless_dev *wdev);
 215
 216 static inline void wdev_lock(struct wireless_dev *wdev)
 217         __acquires(wdev)
 218 {
 219         mutex_lock(&wdev->mtx);
 220         __acquire(wdev->mtx);
 221 }
 222
 223 static inline void wdev_unlock(struct wireless_dev *wdev)
 224         __releases(wdev)
 225 {
 226         __release(wdev->mtx);
 227         mutex_unlock(&wdev->mtx);
 228 }
 229
 230 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 231
 232 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 233 {
 234         ASSERT_RTNL();
 235
 236         return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 237                rdev->num_running_ifaces > 0;
 238 }
 239
 240 enum cfg80211_event_type {
 241         EVENT_CONNECT_RESULT,
 242         EVENT_ROAMED,
 243         EVENT_DISCONNECTED,
 244         EVENT_IBSS_JOINED,
 245         EVENT_STOPPED,
 246         EVENT_PORT_AUTHORIZED,
 247 };
 248
 249 struct cfg80211_event {
 250         struct list_head list;
 251         enum cfg80211_event_type type;
 252
 253         union {
 254                 struct cfg80211_connect_resp_params cr;
 255                 struct cfg80211_roam_info rm;
 256                 struct {
 257                         const u8 *ie;
 258                         size_t ie_len;
 259                         u16 reason;
 260                         bool locally_generated;
 261                 } dc;
 262                 struct {
 263                         u8 bssid[ETH_ALEN];
 264                         struct ieee80211_channel *channel;
 265                 } ij;
 266                 struct {
 267                         u8 bssid[ETH_ALEN];
 268                 } pa;
 269         };
 270 };
 271
 272 struct cfg80211_cached_keys {
 273         struct key_params params[CFG80211_MAX_WEP_KEYS];
 274         u8 data[CFG80211_MAX_WEP_KEYS][WLAN_KEY_LEN_WEP104];
 275         int def;
 276 };
 277
 278 enum cfg80211_chan_mode {
 279         CHAN_MODE_UNDEFINED,
 280         CHAN_MODE_SHARED,
 281         CHAN_MODE_EXCLUSIVE,
 282 };
 283
 284 struct cfg80211_beacon_registration {
 285         struct list_head list;
 286         u32 nlportid;
 287 };
 288
 289 struct cfg80211_cqm_config {
 290         u32 rssi_hyst;
 291         s32 last_rssi_event_value;
 292         int n_rssi_thresholds;
 293         s32 rssi_thresholds[0];
 294 };
 295
 296 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
 297
 298 /* free object */
 299 void cfg80211_dev_free(struct cfg80211_registered_device *rdev);
 300
 301 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 302                         char *newname);
 303
 304 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
 305
 306 void cfg80211_bss_expire(struct cfg80211_registered_device *rdev);
 307 void cfg80211_bss_age(struct cfg80211_registered_device *rdev,
 308                       unsigned long age_secs);
 309 void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev,
 310                                      struct ieee80211_channel *channel);
 311
 312 /* IBSS */
 313 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 314                          struct net_device *dev,
 315                          struct cfg80211_ibss_params *params,
 316                          struct cfg80211_cached_keys *connkeys);
 317 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 318 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 319                           struct net_device *dev, bool nowext);
 320 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 321                         struct net_device *dev, bool nowext);
 322 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
 323                             struct ieee80211_channel *channel);
 324 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 325                             struct wireless_dev *wdev);
 326
 327 /* mesh */
 328 extern const struct mesh_config default_mesh_config;
 329 extern const struct mesh_setup default_mesh_setup;
 330 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 331                          struct net_device *dev,
 332                          struct mesh_setup *setup,
 333                          const struct mesh_config *conf);
 334 int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 335                           struct net_device *dev);
 336 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 337                         struct net_device *dev);
 338 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 339                               struct wireless_dev *wdev,
 340                               struct cfg80211_chan_def *chandef);
 341
 342 /* OCB */
 343 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 344                         struct net_device *dev,
 345                         struct ocb_setup *setup);
 346 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
 347                       struct net_device *dev,
 348                       struct ocb_setup *setup);
 349 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 350                          struct net_device *dev);
 351 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
 352                        struct net_device *dev);
 353
 354 /* AP */
 355 int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 356                        struct net_device *dev, bool notify);
 357 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 358                      struct net_device *dev, bool notify);
 359
 360 /* MLME */
 361 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 362                        struct net_device *dev,
 363                        struct ieee80211_channel *chan,
 364                        enum nl80211_auth_type auth_type,
 365                        const u8 *bssid,
 366                        const u8 *ssid, int ssid_len,
 367                        const u8 *ie, int ie_len,
 368                        const u8 *key, int key_len, int key_idx,
 369                        const u8 *auth_data, int auth_data_len);
 370 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 371                         struct net_device *dev,
 372                         struct ieee80211_channel *chan,
 373                         const u8 *bssid,
 374                         const u8 *ssid, int ssid_len,
 375                         struct cfg80211_assoc_request *req);
 376 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 377                          struct net_device *dev, const u8 *bssid,
 378                          const u8 *ie, int ie_len, u16 reason,
 379                          bool local_state_change);
 380 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 381                            struct net_device *dev, const u8 *bssid,
 382                            const u8 *ie, int ie_len, u16 reason,
 383                            bool local_state_change);
 384 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 385                         struct net_device *dev);
 386 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 387                                 u16 frame_type, const u8 *match_data,
 388                                 int match_len, struct netlink_ext_ack *extack);
 389 void cfg80211_mlme_unreg_wk(struct work_struct *wk);
 390 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 391 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 392 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 393                           struct wireless_dev *wdev,
 394                           struct cfg80211_mgmt_tx_params *params,
 395                           u64 *cookie);
 396 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 397                                const struct ieee80211_ht_cap *ht_capa_mask);
 398 void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
 399                                 const struct ieee80211_vht_cap *vht_capa_mask);
 400
 401 /* SME events */
 402 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 403                      struct net_device *dev,
 404                      struct cfg80211_connect_params *connect,
 405                      struct cfg80211_cached_keys *connkeys,
 406                      const u8 *prev_bssid);
 407 void __cfg80211_connect_result(struct net_device *dev,
 408                                struct cfg80211_connect_resp_params *params,
 409                                bool wextev);
 410 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 411                              size_t ie_len, u16 reason, bool from_ap);
 412 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 413                         struct net_device *dev, u16 reason,
 414                         bool wextev);
 415 void __cfg80211_roamed(struct wireless_dev *wdev,
 416                        struct cfg80211_roam_info *info);
 417 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid);
 418 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 419                               struct wireless_dev *wdev);
 420 void cfg80211_autodisconnect_wk(struct work_struct *work);
 421
 422 /* SME implementation */
 423 void cfg80211_conn_work(struct work_struct *work);
 424 void cfg80211_sme_scan_done(struct net_device *dev);
 425 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status);
 426 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len);
 427 void cfg80211_sme_disassoc(struct wireless_dev *wdev);
 428 void cfg80211_sme_deauth(struct wireless_dev *wdev);
 429 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev);
 430 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev);
 431 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev);
 432
 433 /* internal helpers */
 434 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 435 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 436                                    struct key_params *params, int key_idx,
 437                                    bool pairwise, const u8 *mac_addr);
 438 void __cfg80211_scan_done(struct work_struct *wk);
 439 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 440                            bool send_message);
 441 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
 442                                  struct cfg80211_sched_scan_request *req);
 443 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 444                                      bool want_multi);
 445 void cfg80211_sched_scan_results_wk(struct work_struct *work);
 446 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
 447                                  struct cfg80211_sched_scan_request *req,
 448                                  bool driver_initiated);
 449 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 450                                u64 reqid, bool driver_initiated);
 451 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 452 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 453                           struct net_device *dev, enum nl80211_iftype ntype,
 454                           struct vif_params *params);
 455 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 456 void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 457
 458 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
 459                                 u32 center_freq_khz, u32 bw_khz);
 460
 461 extern struct work_struct cfg80211_disconnect_work;
 462
 463 /**
 464  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
 465  * @wiphy: the wiphy to validate against
 466  * @chandef: the channel definition to check
 467  *
 468  * Checks if chandef is usable and we can/need start CAC on such channel.
 469  *
 470  * Return: Return true if all channels available and at least
 471  *         one channel require CAC (NL80211_DFS_USABLE)
 472  */
 473 bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
 474                                  const struct cfg80211_chan_def *chandef);
 475
 476 void cfg80211_set_dfs_state(struct wiphy *wiphy,
 477                             const struct cfg80211_chan_def *chandef,
 478                             enum nl80211_dfs_state dfs_state);
 479
 480 void cfg80211_dfs_channels_update_work(struct work_struct *work);
 481
 482 unsigned int
 483 cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
 484                               const struct cfg80211_chan_def *chandef);
 485
 486 void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev);
 487
 488 bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy,
 489                                   struct ieee80211_channel *chan);
 490
 491 bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev);
 492
 493 bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef,
 494                           struct ieee80211_channel *chan);
 495
 496 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
 497 {
 498         unsigned long end = jiffies;
 499
 500         if (end >= start)
 501                 return jiffies_to_msecs(end - start);
 502
 503         return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
 504 }
 505
 506 void
 507 cfg80211_get_chan_state(struct wireless_dev *wdev,
 508                         struct ieee80211_channel **chan,
 509                         enum cfg80211_chan_mode *chanmode,
 510                         u8 *radar_detect);
 511
 512 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 513                                  struct cfg80211_chan_def *chandef);
 514
 515 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 516                            const u8 *rates, unsigned int n_rates,
 517                            u32 *mask);
 518
 519 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 520                                  enum nl80211_iftype iftype, u32 beacon_int);
 521
 522 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 523                                enum nl80211_iftype iftype, int num);
 524
 525 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
 526                       struct wireless_dev *wdev);
 527 void cfg80211_leave(struct cfg80211_registered_device *rdev,
 528                     struct wireless_dev *wdev);
 529
 530 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
 531                               struct wireless_dev *wdev);
 532
 533 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
 534                        struct wireless_dev *wdev);
 535
 536 struct cfg80211_internal_bss *
 537 cfg80211_bss_update(struct cfg80211_registered_device *rdev,
 538                     struct cfg80211_internal_bss *tmp,
 539                     bool signal_valid, unsigned long ts);
 540 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 541 #define CFG80211_DEV_WARN_ON(cond)      WARN_ON(cond)
 542 #else
 543 /*
 544  * Trick to enable using it as a condition,
 545  * and also not give a warning when it's
 546  * not used that way.
 547  */
 548 #define CFG80211_DEV_WARN_ON(cond)      ({bool __r = (cond); __r; })
 549 #endif
 550
 551 void cfg80211_cqm_config_free(struct wireless_dev *wdev);
 552
 553 void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid);
 554 void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev);
 555 void cfg80211_pmsr_free_wk(struct work_struct *work);
 556
 557 #endif /* __NET_WIRELESS_CORE_H */