1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008, 2009 open80211s Ltd. 4 * Copyright (C) 2018 - 2024 Intel Corporation 5 * Authors: Luis Carlos Cobo <luisca@cozybit.com> 6 * Javier Cardona <javier@cozybit.com> 7 */ 8 9 #include <linux/slab.h> 10 #include <linux/unaligned.h> 11 #include <net/sock.h> 12 #include "ieee80211_i.h" 13 #include "mesh.h" 14 #include "wme.h" 15 #include "driver-ops.h" 16 17 static int mesh_allocated; 18 static struct kmem_cache *rm_cache; 19 20 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) 21 { 22 return (mgmt->u.action.u.mesh_action.action_code == 23 WLAN_MESH_ACTION_HWMP_PATH_SELECTION); 24 } 25 26 void ieee80211s_init(void) 27 { 28 mesh_allocated = 1; 29 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), 30 0, 0, NULL); 31 } 32 33 void ieee80211s_stop(void) 34 { 35 if (!mesh_allocated) 36 return; 37 kmem_cache_destroy(rm_cache); 38 } 39 40 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) 41 { 42 struct ieee80211_sub_if_data *sdata = 43 timer_container_of(sdata, t, u.mesh.housekeeping_timer); 44 struct ieee80211_local *local = sdata->local; 45 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 46 47 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 48 49 wiphy_work_queue(local->hw.wiphy, &sdata->work); 50 } 51 52 /** 53 * mesh_matches_local - check if the config of a mesh point matches ours 54 * 55 * @sdata: local mesh subif 56 * @ie: information elements of a management frame from the mesh peer 57 * 58 * This function checks if the mesh configuration of a mesh point matches the 59 * local mesh configuration, i.e. if both nodes belong to the same mesh network. 60 * 61 * Returns: %true if both nodes belong to the same mesh 62 */ 63 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, 64 struct ieee802_11_elems *ie) 65 { 66 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 67 u32 basic_rates = 0; 68 struct cfg80211_chan_def sta_chan_def; 69 struct ieee80211_supported_band *sband; 70 u32 vht_cap_info = 0; 71 72 /* 73 * As support for each feature is added, check for matching 74 * - On mesh config capabilities 75 * - Power Save Support En 76 * - Sync support enabled 77 * - Sync support active 78 * - Sync support required from peer 79 * - MDA enabled 80 * - Power management control on fc 81 */ 82 if (!(ifmsh->mesh_id_len == ie->mesh_id_len && 83 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 84 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && 85 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && 86 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && 87 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && 88 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) 89 return false; 90 91 sband = ieee80211_get_sband(sdata); 92 if (!sband) 93 return false; 94 95 ieee80211_sta_get_rates(sdata, ie, sband->band, 96 &basic_rates); 97 98 if (sdata->vif.bss_conf.basic_rates != basic_rates) 99 return false; 100 101 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chanreq.oper.chan, 102 NL80211_CHAN_NO_HT); 103 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); 104 105 if (ie->vht_cap_elem) 106 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); 107 108 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 109 ie->vht_operation, ie->ht_operation, 110 &sta_chan_def); 111 ieee80211_chandef_he_6ghz_oper(sdata->local, ie->he_operation, 112 ie->eht_operation, 113 &sta_chan_def); 114 115 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chanreq.oper, 116 &sta_chan_def)) 117 return false; 118 119 return true; 120 } 121 122 /** 123 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 124 * 125 * @ie: information elements of a management frame from the mesh peer 126 * 127 * Returns: %true if the mesh peer is willing to establish peer links 128 */ 129 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 130 { 131 return (ie->mesh_config->meshconf_cap & 132 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 133 } 134 135 /** 136 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 137 * 138 * @sdata: mesh interface in which mesh beacons are going to be updated 139 * 140 * Returns: beacon changed flag if the beacon content changed. 141 */ 142 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 143 { 144 bool free_plinks; 145 u64 changed = 0; 146 147 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 148 * the mesh interface might be able to establish plinks with peers that 149 * are already on the table but are not on PLINK_ESTAB state. However, 150 * in general the mesh interface is not accepting peer link requests 151 * from new peers, and that must be reflected in the beacon 152 */ 153 free_plinks = mesh_plink_availables(sdata); 154 155 if (free_plinks != sdata->u.mesh.accepting_plinks) { 156 sdata->u.mesh.accepting_plinks = free_plinks; 157 changed = BSS_CHANGED_BEACON; 158 } 159 160 return changed; 161 } 162 163 /* 164 * mesh_sta_cleanup - clean up any mesh sta state 165 * 166 * @sta: mesh sta to clean up. 167 */ 168 void mesh_sta_cleanup(struct sta_info *sta) 169 { 170 struct ieee80211_sub_if_data *sdata = sta->sdata; 171 u64 changed = mesh_plink_deactivate(sta); 172 173 if (changed) 174 ieee80211_mbss_info_change_notify(sdata, changed); 175 } 176 177 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 178 { 179 int i; 180 181 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); 182 if (!sdata->u.mesh.rmc) 183 return -ENOMEM; 184 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 185 for (i = 0; i < RMC_BUCKETS; i++) 186 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 187 return 0; 188 } 189 190 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 191 { 192 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 193 struct rmc_entry *p; 194 struct hlist_node *n; 195 int i; 196 197 if (!sdata->u.mesh.rmc) 198 return; 199 200 for (i = 0; i < RMC_BUCKETS; i++) { 201 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 202 hlist_del(&p->list); 203 kmem_cache_free(rm_cache, p); 204 } 205 } 206 207 kfree(rmc); 208 sdata->u.mesh.rmc = NULL; 209 } 210 211 /** 212 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 213 * 214 * @sdata: interface 215 * @sa: source address 216 * @mesh_hdr: mesh_header 217 * 218 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 219 * 220 * Checks using the source address and the mesh sequence number if we have 221 * received this frame lately. If the frame is not in the cache, it is added to 222 * it. 223 */ 224 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 225 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 226 { 227 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 228 u32 seqnum = 0; 229 int entries = 0; 230 u8 idx; 231 struct rmc_entry *p; 232 struct hlist_node *n; 233 234 if (!rmc) 235 return -1; 236 237 /* Don't care about endianness since only match matters */ 238 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 239 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 240 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 241 ++entries; 242 if (time_after(jiffies, p->exp_time) || 243 entries == RMC_QUEUE_MAX_LEN) { 244 hlist_del(&p->list); 245 kmem_cache_free(rm_cache, p); 246 --entries; 247 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 248 return -1; 249 } 250 251 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 252 if (!p) 253 return 0; 254 255 p->seqnum = seqnum; 256 p->exp_time = jiffies + RMC_TIMEOUT; 257 memcpy(p->sa, sa, ETH_ALEN); 258 hlist_add_head(&p->list, &rmc->bucket[idx]); 259 return 0; 260 } 261 262 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 263 struct sk_buff *skb) 264 { 265 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 266 u8 *pos, neighbors; 267 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 268 bool is_connected_to_gate = ifmsh->num_gates > 0 || 269 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 270 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 271 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 272 273 if (skb_tailroom(skb) < 2 + meshconf_len) 274 return -ENOMEM; 275 276 pos = skb_put(skb, 2 + meshconf_len); 277 *pos++ = WLAN_EID_MESH_CONFIG; 278 *pos++ = meshconf_len; 279 280 /* save a pointer for quick updates in pre-tbtt */ 281 ifmsh->meshconf_offset = pos - skb->data; 282 283 /* Active path selection protocol ID */ 284 *pos++ = ifmsh->mesh_pp_id; 285 /* Active path selection metric ID */ 286 *pos++ = ifmsh->mesh_pm_id; 287 /* Congestion control mode identifier */ 288 *pos++ = ifmsh->mesh_cc_id; 289 /* Synchronization protocol identifier */ 290 *pos++ = ifmsh->mesh_sp_id; 291 /* Authentication Protocol identifier */ 292 *pos++ = ifmsh->mesh_auth_id; 293 /* Mesh Formation Info - number of neighbors */ 294 neighbors = atomic_read(&ifmsh->estab_plinks); 295 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 296 *pos++ = (is_connected_to_as << 7) | 297 (neighbors << 1) | 298 is_connected_to_gate; 299 /* Mesh capability */ 300 *pos = 0x00; 301 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 302 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 303 *pos |= ifmsh->accepting_plinks ? 304 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 305 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 306 *pos |= ifmsh->ps_peers_deep_sleep ? 307 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 308 return 0; 309 } 310 311 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 312 { 313 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 314 u8 *pos; 315 316 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 317 return -ENOMEM; 318 319 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 320 *pos++ = WLAN_EID_MESH_ID; 321 *pos++ = ifmsh->mesh_id_len; 322 if (ifmsh->mesh_id_len) 323 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 324 325 return 0; 326 } 327 328 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 329 struct sk_buff *skb) 330 { 331 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 332 u8 *pos; 333 334 /* see IEEE802.11-2012 13.14.6 */ 335 if (ifmsh->ps_peers_light_sleep == 0 && 336 ifmsh->ps_peers_deep_sleep == 0 && 337 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 338 return 0; 339 340 if (skb_tailroom(skb) < 4) 341 return -ENOMEM; 342 343 pos = skb_put(skb, 2 + 2); 344 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 345 *pos++ = 2; 346 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 347 348 return 0; 349 } 350 351 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 352 struct sk_buff *skb) 353 { 354 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 355 u8 offset, len; 356 const u8 *data; 357 358 if (!ifmsh->ie || !ifmsh->ie_len) 359 return 0; 360 361 /* fast-forward to vendor IEs */ 362 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 363 364 if (offset < ifmsh->ie_len) { 365 len = ifmsh->ie_len - offset; 366 data = ifmsh->ie + offset; 367 if (skb_tailroom(skb) < len) 368 return -ENOMEM; 369 skb_put_data(skb, data, len); 370 } 371 372 return 0; 373 } 374 375 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 376 { 377 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 378 u8 len = 0; 379 const u8 *data; 380 381 if (!ifmsh->ie || !ifmsh->ie_len) 382 return 0; 383 384 /* find RSN IE */ 385 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 386 if (!data) 387 return 0; 388 389 len = data[1] + 2; 390 391 if (skb_tailroom(skb) < len) 392 return -ENOMEM; 393 skb_put_data(skb, data, len); 394 395 return 0; 396 } 397 398 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 399 struct sk_buff *skb) 400 { 401 struct ieee80211_chanctx_conf *chanctx_conf; 402 struct ieee80211_channel *chan; 403 u8 *pos; 404 405 if (skb_tailroom(skb) < 3) 406 return -ENOMEM; 407 408 rcu_read_lock(); 409 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 410 if (WARN_ON(!chanctx_conf)) { 411 rcu_read_unlock(); 412 return -EINVAL; 413 } 414 chan = chanctx_conf->def.chan; 415 rcu_read_unlock(); 416 417 pos = skb_put(skb, 2 + 1); 418 *pos++ = WLAN_EID_DS_PARAMS; 419 *pos++ = 1; 420 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 421 422 return 0; 423 } 424 425 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 426 struct sk_buff *skb) 427 { 428 struct ieee80211_supported_band *sband; 429 u8 *pos; 430 431 sband = ieee80211_get_sband(sdata); 432 if (!sband) 433 return -EINVAL; 434 435 /* HT not allowed in 6 GHz */ 436 if (sband->band == NL80211_BAND_6GHZ) 437 return 0; 438 439 if (!sband->ht_cap.ht_supported || 440 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 441 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 442 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 443 return 0; 444 445 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 446 return -ENOMEM; 447 448 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 449 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 450 451 return 0; 452 } 453 454 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 455 struct sk_buff *skb) 456 { 457 struct ieee80211_local *local = sdata->local; 458 struct ieee80211_chanctx_conf *chanctx_conf; 459 struct ieee80211_channel *channel; 460 struct ieee80211_supported_band *sband; 461 struct ieee80211_sta_ht_cap *ht_cap; 462 u8 *pos; 463 464 rcu_read_lock(); 465 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 466 if (WARN_ON(!chanctx_conf)) { 467 rcu_read_unlock(); 468 return -EINVAL; 469 } 470 channel = chanctx_conf->def.chan; 471 rcu_read_unlock(); 472 473 sband = local->hw.wiphy->bands[channel->band]; 474 ht_cap = &sband->ht_cap; 475 476 /* HT not allowed in 6 GHz */ 477 if (sband->band == NL80211_BAND_6GHZ) 478 return 0; 479 480 if (!ht_cap->ht_supported || 481 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 482 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 483 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 484 return 0; 485 486 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 487 return -ENOMEM; 488 489 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 490 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chanreq.oper, 491 sdata->vif.bss_conf.ht_operation_mode, 492 false); 493 494 return 0; 495 } 496 497 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 498 struct sk_buff *skb) 499 { 500 struct ieee80211_supported_band *sband; 501 u8 *pos; 502 503 sband = ieee80211_get_sband(sdata); 504 if (!sband) 505 return -EINVAL; 506 507 /* VHT not allowed in 6 GHz */ 508 if (sband->band == NL80211_BAND_6GHZ) 509 return 0; 510 511 if (!sband->vht_cap.vht_supported || 512 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 513 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 514 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 515 return 0; 516 517 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 518 return -ENOMEM; 519 520 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 521 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 522 523 return 0; 524 } 525 526 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 527 struct sk_buff *skb) 528 { 529 struct ieee80211_local *local = sdata->local; 530 struct ieee80211_chanctx_conf *chanctx_conf; 531 struct ieee80211_channel *channel; 532 struct ieee80211_supported_band *sband; 533 struct ieee80211_sta_vht_cap *vht_cap; 534 u8 *pos; 535 536 rcu_read_lock(); 537 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 538 if (WARN_ON(!chanctx_conf)) { 539 rcu_read_unlock(); 540 return -EINVAL; 541 } 542 channel = chanctx_conf->def.chan; 543 rcu_read_unlock(); 544 545 sband = local->hw.wiphy->bands[channel->band]; 546 vht_cap = &sband->vht_cap; 547 548 /* VHT not allowed in 6 GHz */ 549 if (sband->band == NL80211_BAND_6GHZ) 550 return 0; 551 552 if (!vht_cap->vht_supported || 553 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 554 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 555 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 556 return 0; 557 558 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 559 return -ENOMEM; 560 561 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 562 ieee80211_ie_build_vht_oper(pos, vht_cap, 563 &sdata->vif.bss_conf.chanreq.oper); 564 565 return 0; 566 } 567 568 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 569 struct sk_buff *skb, u8 ie_len) 570 { 571 struct ieee80211_supported_band *sband; 572 573 sband = ieee80211_get_sband(sdata); 574 if (!sband) 575 return -EINVAL; 576 577 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 578 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 579 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 580 return 0; 581 582 return ieee80211_put_he_cap(skb, sdata, sband, NULL); 583 } 584 585 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 586 struct sk_buff *skb) 587 { 588 const struct ieee80211_sta_he_cap *he_cap; 589 struct ieee80211_supported_band *sband; 590 u32 len; 591 u8 *pos; 592 593 sband = ieee80211_get_sband(sdata); 594 if (!sband) 595 return -EINVAL; 596 597 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 598 if (!he_cap || 599 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 600 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 601 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 602 return 0; 603 604 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 605 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ) 606 len += sizeof(struct ieee80211_he_6ghz_oper); 607 608 if (skb_tailroom(skb) < len) 609 return -ENOMEM; 610 611 pos = skb_put(skb, len); 612 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper); 613 614 return 0; 615 } 616 617 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 618 struct sk_buff *skb) 619 { 620 struct ieee80211_supported_band *sband; 621 const struct ieee80211_sband_iftype_data *iftd; 622 623 sband = ieee80211_get_sband(sdata); 624 if (!sband) 625 return -EINVAL; 626 627 iftd = ieee80211_get_sband_iftype_data(sband, 628 NL80211_IFTYPE_MESH_POINT); 629 /* The device doesn't support HE in mesh mode or at all */ 630 if (!iftd) 631 return 0; 632 633 ieee80211_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode); 634 return 0; 635 } 636 637 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 638 struct sk_buff *skb, u8 ie_len) 639 { 640 struct ieee80211_supported_band *sband; 641 642 sband = ieee80211_get_sband(sdata); 643 if (!sband) 644 return -EINVAL; 645 646 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 647 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 648 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 649 return 0; 650 651 return ieee80211_put_eht_cap(skb, sdata, sband, NULL); 652 } 653 654 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 655 { 656 const struct ieee80211_sta_eht_cap *eht_cap; 657 struct ieee80211_supported_band *sband; 658 u32 len; 659 u8 *pos; 660 661 sband = ieee80211_get_sband(sdata); 662 if (!sband) 663 return -EINVAL; 664 665 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 666 if (!eht_cap || 667 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 668 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 669 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 670 return 0; 671 672 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 673 offsetof(struct ieee80211_eht_operation_info, optional); 674 675 if (skb_tailroom(skb) < len) 676 return -ENOMEM; 677 678 pos = skb_put(skb, len); 679 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap); 680 681 return 0; 682 } 683 684 static void ieee80211_mesh_path_timer(struct timer_list *t) 685 { 686 struct ieee80211_sub_if_data *sdata = 687 timer_container_of(sdata, t, u.mesh.mesh_path_timer); 688 689 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 690 } 691 692 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 693 { 694 struct ieee80211_sub_if_data *sdata = 695 timer_container_of(sdata, t, u.mesh.mesh_path_root_timer); 696 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 697 698 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 699 700 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 701 } 702 703 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 704 { 705 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 706 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 707 else { 708 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 709 /* stop running timer */ 710 timer_delete_sync(&ifmsh->mesh_path_root_timer); 711 } 712 } 713 714 static void 715 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 716 u8 *ie, u8 ie_len) 717 { 718 struct ieee80211_supported_band *sband; 719 const struct element *cap; 720 const struct ieee80211_he_operation *he_oper = NULL; 721 722 sband = ieee80211_get_sband(sdata); 723 if (!sband) 724 return; 725 726 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 727 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 728 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 729 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 730 return; 731 732 sdata->vif.bss_conf.he_support = true; 733 734 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 735 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 736 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 737 he_oper = (void *)(cap->data + 1); 738 739 if (he_oper) 740 sdata->vif.bss_conf.he_oper.params = 741 __le32_to_cpu(he_oper->he_oper_params); 742 743 sdata->vif.bss_conf.eht_support = 744 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 745 } 746 747 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 748 struct sk_buff *skb, u32 ctrl_flags) 749 { 750 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 751 struct ieee80211_mesh_fast_tx_key key = { 752 .type = MESH_FAST_TX_TYPE_LOCAL 753 }; 754 struct ieee80211_mesh_fast_tx *entry; 755 struct ieee80211s_hdr *meshhdr; 756 u8 sa[ETH_ALEN] __aligned(2); 757 struct tid_ampdu_tx *tid_tx; 758 struct sta_info *sta; 759 bool copy_sa = false; 760 u16 ethertype; 761 u8 tid; 762 763 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 764 return false; 765 766 if (ifmsh->mshcfg.dot11MeshNolearn) 767 return false; 768 769 /* Add support for these cases later */ 770 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 771 return false; 772 773 if (is_multicast_ether_addr(skb->data)) 774 return false; 775 776 ethertype = (skb->data[12] << 8) | skb->data[13]; 777 if (ethertype < ETH_P_802_3_MIN) 778 return false; 779 780 if (sk_requests_wifi_status(skb->sk)) 781 return false; 782 783 if (skb->ip_summed == CHECKSUM_PARTIAL) { 784 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 785 if (skb_checksum_help(skb)) 786 return false; 787 } 788 789 ether_addr_copy(key.addr, skb->data); 790 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr)) 791 key.type = MESH_FAST_TX_TYPE_PROXIED; 792 entry = mesh_fast_tx_get(sdata, &key); 793 if (!entry) 794 return false; 795 796 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 797 return false; 798 799 sta = rcu_dereference(entry->mpath->next_hop); 800 if (!sta) 801 return false; 802 803 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 804 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 805 if (tid_tx) { 806 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 807 return false; 808 if (tid_tx->timeout) 809 tid_tx->last_tx = jiffies; 810 } 811 812 skb = skb_share_check(skb, GFP_ATOMIC); 813 if (!skb) 814 return true; 815 816 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 817 818 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 819 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 820 /* preserve SA from eth header for 6-addr frames */ 821 ether_addr_copy(sa, skb->data + ETH_ALEN); 822 copy_sa = true; 823 } 824 825 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 826 entry->hdrlen); 827 828 meshhdr = (struct ieee80211s_hdr *)skb->data; 829 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 830 &meshhdr->seqnum); 831 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 832 if (copy_sa) 833 ether_addr_copy(meshhdr->eaddr2, sa); 834 835 skb_push(skb, 2 * ETH_ALEN); 836 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 837 entry->mpath->dst, sdata->vif.addr); 838 839 return true; 840 } 841 842 /** 843 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 844 * @hdr: 802.11 frame header 845 * @fc: frame control field 846 * @meshda: destination address in the mesh 847 * @meshsa: source address in the mesh. Same as TA, as frame is 848 * locally originated. 849 * 850 * Returns: the length of the 802.11 frame header (excludes mesh control header) 851 */ 852 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 853 const u8 *meshda, const u8 *meshsa) 854 { 855 if (is_multicast_ether_addr(meshda)) { 856 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 857 /* DA TA SA */ 858 memcpy(hdr->addr1, meshda, ETH_ALEN); 859 memcpy(hdr->addr2, meshsa, ETH_ALEN); 860 memcpy(hdr->addr3, meshsa, ETH_ALEN); 861 return 24; 862 } else { 863 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 864 /* RA TA DA SA */ 865 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 866 memcpy(hdr->addr2, meshsa, ETH_ALEN); 867 memcpy(hdr->addr3, meshda, ETH_ALEN); 868 memcpy(hdr->addr4, meshsa, ETH_ALEN); 869 return 30; 870 } 871 } 872 873 /** 874 * ieee80211_new_mesh_header - create a new mesh header 875 * @sdata: mesh interface to be used 876 * @meshhdr: uninitialized mesh header 877 * @addr4or5: 1st address in the ae header, which may correspond to address 4 878 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 879 * be NULL. 880 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 881 * mesh frame 882 * 883 * Returns: the header length 884 */ 885 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 886 struct ieee80211s_hdr *meshhdr, 887 const char *addr4or5, const char *addr6) 888 { 889 if (WARN_ON(!addr4or5 && addr6)) 890 return 0; 891 892 memset(meshhdr, 0, sizeof(*meshhdr)); 893 894 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 895 896 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 897 &meshhdr->seqnum); 898 if (addr4or5 && !addr6) { 899 meshhdr->flags |= MESH_FLAGS_AE_A4; 900 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 901 return 2 * ETH_ALEN; 902 } else if (addr4or5 && addr6) { 903 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 904 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 905 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 906 return 3 * ETH_ALEN; 907 } 908 909 return ETH_ALEN; 910 } 911 912 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 913 { 914 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 915 u64 changed; 916 917 if (ifmsh->mshcfg.plink_timeout > 0) 918 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 919 mesh_path_expire(sdata); 920 921 changed = mesh_accept_plinks_update(sdata); 922 ieee80211_mbss_info_change_notify(sdata, changed); 923 924 mesh_fast_tx_gc(sdata); 925 926 mod_timer(&ifmsh->housekeeping_timer, 927 round_jiffies(jiffies + 928 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 929 } 930 931 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 932 { 933 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 934 u32 interval; 935 936 mesh_path_tx_root_frame(sdata); 937 938 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 939 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 940 else 941 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 942 943 mod_timer(&ifmsh->mesh_path_root_timer, 944 round_jiffies(TU_TO_EXP_TIME(interval))); 945 } 946 947 static int 948 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 949 { 950 struct beacon_data *bcn; 951 int head_len, tail_len; 952 struct sk_buff *skb; 953 struct ieee80211_mgmt *mgmt; 954 struct mesh_csa_settings *csa; 955 const struct ieee80211_supported_band *sband; 956 u8 ie_len_he_cap, ie_len_eht_cap; 957 u8 *pos; 958 struct ieee80211_sub_if_data *sdata; 959 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 960 961 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 962 963 sband = ieee80211_get_sband(sdata); 964 965 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata); 966 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata); 967 head_len = hdr_len + 968 2 + /* NULL SSID */ 969 /* Channel Switch Announcement */ 970 2 + sizeof(struct ieee80211_channel_sw_ie) + 971 /* Mesh Channel Switch Parameters */ 972 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 973 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 974 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 975 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 976 2 + 8 + /* supported rates */ 977 2 + 3; /* DS params */ 978 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 979 2 + sizeof(struct ieee80211_ht_cap) + 980 2 + sizeof(struct ieee80211_ht_operation) + 981 2 + ifmsh->mesh_id_len + 982 2 + sizeof(struct ieee80211_meshconf_ie) + 983 2 + sizeof(__le16) + /* awake window */ 984 2 + sizeof(struct ieee80211_vht_cap) + 985 2 + sizeof(struct ieee80211_vht_operation) + 986 ie_len_he_cap + 987 2 + 1 + sizeof(struct ieee80211_he_operation) + 988 sizeof(struct ieee80211_he_6ghz_oper) + 989 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 990 ie_len_eht_cap + 991 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 992 offsetof(struct ieee80211_eht_operation_info, optional) + 993 ifmsh->ie_len; 994 995 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 996 /* need an skb for IE builders to operate on */ 997 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 998 999 if (!bcn || !skb) 1000 goto out_free; 1001 1002 /* 1003 * pointers go into the block we allocated, 1004 * memory is | beacon_data | head | tail | 1005 */ 1006 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1007 1008 /* fill in the head */ 1009 mgmt = skb_put_zero(skb, hdr_len); 1010 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1011 IEEE80211_STYPE_BEACON); 1012 eth_broadcast_addr(mgmt->da); 1013 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1014 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1015 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1016 mgmt->u.beacon.beacon_int = 1017 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1018 mgmt->u.beacon.capab_info |= cpu_to_le16( 1019 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1020 1021 pos = skb_put(skb, 2); 1022 *pos++ = WLAN_EID_SSID; 1023 *pos++ = 0x0; 1024 1025 rcu_read_lock(); 1026 csa = rcu_dereference(ifmsh->csa); 1027 if (csa) { 1028 enum nl80211_channel_type ct; 1029 struct cfg80211_chan_def *chandef; 1030 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1031 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1032 1033 pos = skb_put_zero(skb, ie_len); 1034 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1035 *pos++ = 3; 1036 *pos++ = 0x0; 1037 *pos++ = ieee80211_frequency_to_channel( 1038 csa->settings.chandef.chan->center_freq); 1039 bcn->cntdwn_current_counter = csa->settings.count; 1040 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1041 *pos++ = csa->settings.count; 1042 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1043 *pos++ = 6; 1044 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1045 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1046 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1047 } else { 1048 *pos++ = ifmsh->chsw_ttl; 1049 } 1050 *pos++ |= csa->settings.block_tx ? 1051 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1052 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1053 pos += 2; 1054 put_unaligned_le16(ifmsh->pre_value, pos); 1055 pos += 2; 1056 1057 switch (csa->settings.chandef.width) { 1058 case NL80211_CHAN_WIDTH_40: 1059 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1060 pos = skb_put_zero(skb, ie_len); 1061 1062 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1063 *pos++ = 1; /* len */ 1064 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1065 if (ct == NL80211_CHAN_HT40PLUS) 1066 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1067 else 1068 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1069 break; 1070 case NL80211_CHAN_WIDTH_80: 1071 case NL80211_CHAN_WIDTH_80P80: 1072 case NL80211_CHAN_WIDTH_160: 1073 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1074 ie_len = 2 + 2 + 1075 sizeof(struct ieee80211_wide_bw_chansw_ie); 1076 pos = skb_put_zero(skb, ie_len); 1077 1078 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1079 *pos++ = 5; /* len */ 1080 /* put sub IE */ 1081 chandef = &csa->settings.chandef; 1082 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1083 break; 1084 default: 1085 break; 1086 } 1087 } 1088 rcu_read_unlock(); 1089 1090 if (ieee80211_put_srates_elem(skb, sband, 1091 sdata->vif.bss_conf.basic_rates, 1092 0, WLAN_EID_SUPP_RATES) || 1093 mesh_add_ds_params_ie(sdata, skb)) 1094 goto out_free; 1095 1096 bcn->head_len = skb->len; 1097 memcpy(bcn->head, skb->data, bcn->head_len); 1098 1099 /* now the tail */ 1100 skb_trim(skb, 0); 1101 bcn->tail = bcn->head + bcn->head_len; 1102 1103 if (ieee80211_put_srates_elem(skb, sband, 1104 sdata->vif.bss_conf.basic_rates, 1105 0, WLAN_EID_EXT_SUPP_RATES) || 1106 mesh_add_rsn_ie(sdata, skb) || 1107 mesh_add_ht_cap_ie(sdata, skb) || 1108 mesh_add_ht_oper_ie(sdata, skb) || 1109 mesh_add_meshid_ie(sdata, skb) || 1110 mesh_add_meshconf_ie(sdata, skb) || 1111 mesh_add_awake_window_ie(sdata, skb) || 1112 mesh_add_vht_cap_ie(sdata, skb) || 1113 mesh_add_vht_oper_ie(sdata, skb) || 1114 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1115 mesh_add_he_oper_ie(sdata, skb) || 1116 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1117 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1118 mesh_add_eht_oper_ie(sdata, skb) || 1119 mesh_add_vendor_ies(sdata, skb)) 1120 goto out_free; 1121 1122 bcn->tail_len = skb->len; 1123 memcpy(bcn->tail, skb->data, bcn->tail_len); 1124 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1125 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1126 (bcn->tail + ifmsh->meshconf_offset); 1127 1128 dev_kfree_skb(skb); 1129 rcu_assign_pointer(ifmsh->beacon, bcn); 1130 return 0; 1131 out_free: 1132 kfree(bcn); 1133 dev_kfree_skb(skb); 1134 return -ENOMEM; 1135 } 1136 1137 static int 1138 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1139 { 1140 struct beacon_data *old_bcn; 1141 int ret; 1142 1143 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1144 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1145 if (ret) 1146 /* just reuse old beacon */ 1147 return ret; 1148 1149 if (old_bcn) 1150 kfree_rcu(old_bcn, rcu_head); 1151 return 0; 1152 } 1153 1154 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1155 u64 changed) 1156 { 1157 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1158 unsigned long bits[] = { BITMAP_FROM_U64(changed) }; 1159 u32 bit; 1160 1161 if (!changed) 1162 return; 1163 1164 /* if we race with running work, worst case this work becomes a noop */ 1165 for_each_set_bit(bit, bits, sizeof(changed) * BITS_PER_BYTE) 1166 set_bit(bit, ifmsh->mbss_changed); 1167 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1168 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1169 } 1170 1171 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1172 { 1173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1174 struct ieee80211_local *local = sdata->local; 1175 u64 changed = BSS_CHANGED_BEACON | 1176 BSS_CHANGED_BEACON_ENABLED | 1177 BSS_CHANGED_HT | 1178 BSS_CHANGED_BASIC_RATES | 1179 BSS_CHANGED_BEACON_INT | 1180 BSS_CHANGED_MCAST_RATE; 1181 1182 local->fif_other_bss++; 1183 /* mesh ifaces must set allmulti to forward mcast traffic */ 1184 atomic_inc(&local->iff_allmultis); 1185 ieee80211_configure_filter(local); 1186 1187 ifmsh->mesh_cc_id = 0; /* Disabled */ 1188 /* register sync ops from extensible synchronization framework */ 1189 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1190 ifmsh->sync_offset_clockdrift_max = 0; 1191 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1192 ieee80211_mesh_root_setup(ifmsh); 1193 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1194 sdata->vif.bss_conf.ht_operation_mode = 1195 ifmsh->mshcfg.ht_opmode; 1196 sdata->vif.bss_conf.enable_beacon = true; 1197 1198 changed |= ieee80211_mps_local_status_update(sdata); 1199 1200 if (ieee80211_mesh_build_beacon(ifmsh)) { 1201 ieee80211_stop_mesh(sdata); 1202 return -ENOMEM; 1203 } 1204 1205 ieee80211_recalc_dtim(sdata, drv_get_tsf(local, sdata)); 1206 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1207 1208 netif_carrier_on(sdata->dev); 1209 return 0; 1210 } 1211 1212 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1213 { 1214 struct ieee80211_local *local = sdata->local; 1215 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1216 struct beacon_data *bcn; 1217 1218 netif_carrier_off(sdata->dev); 1219 1220 /* flush STAs and mpaths on this iface */ 1221 sta_info_flush(sdata, -1); 1222 ieee80211_free_keys(sdata, true); 1223 mesh_path_flush_by_iface(sdata); 1224 1225 /* stop the beacon */ 1226 ifmsh->mesh_id_len = 0; 1227 sdata->vif.bss_conf.enable_beacon = false; 1228 sdata->beacon_rate_set = false; 1229 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1230 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1231 BSS_CHANGED_BEACON_ENABLED); 1232 1233 /* remove beacon */ 1234 bcn = sdata_dereference(ifmsh->beacon, sdata); 1235 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1236 kfree_rcu(bcn, rcu_head); 1237 1238 /* free all potentially still buffered group-addressed frames */ 1239 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1240 skb_queue_purge(&ifmsh->ps.bc_buf); 1241 1242 timer_delete_sync(&sdata->u.mesh.housekeeping_timer); 1243 timer_delete_sync(&sdata->u.mesh.mesh_path_root_timer); 1244 timer_delete_sync(&sdata->u.mesh.mesh_path_timer); 1245 1246 /* clear any mesh work (for next join) we may have accrued */ 1247 ifmsh->wrkq_flags = 0; 1248 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1249 1250 local->fif_other_bss--; 1251 atomic_dec(&local->iff_allmultis); 1252 ieee80211_configure_filter(local); 1253 } 1254 1255 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1256 { 1257 int err; 1258 1259 /* if the current channel is a DFS channel, mark the channel as 1260 * unavailable. 1261 */ 1262 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1263 &sdata->vif.bss_conf.chanreq.oper, 1264 NL80211_IFTYPE_MESH_POINT); 1265 if (err > 0) 1266 cfg80211_radar_event(sdata->local->hw.wiphy, 1267 &sdata->vif.bss_conf.chanreq.oper, 1268 GFP_ATOMIC); 1269 } 1270 1271 static bool 1272 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1273 struct ieee802_11_elems *elems, bool beacon) 1274 { 1275 struct cfg80211_csa_settings params; 1276 struct ieee80211_csa_ie csa_ie; 1277 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1278 struct ieee80211_supported_band *sband; 1279 int err; 1280 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited; 1281 u32 vht_cap_info = 0; 1282 1283 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1284 1285 sband = ieee80211_get_sband(sdata); 1286 if (!sband) 1287 return false; 1288 1289 switch (sdata->vif.bss_conf.chanreq.oper.width) { 1290 case NL80211_CHAN_WIDTH_20_NOHT: 1291 conn.mode = IEEE80211_CONN_MODE_LEGACY; 1292 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1293 break; 1294 case NL80211_CHAN_WIDTH_20: 1295 conn.mode = IEEE80211_CONN_MODE_HT; 1296 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1297 break; 1298 case NL80211_CHAN_WIDTH_40: 1299 conn.mode = IEEE80211_CONN_MODE_HT; 1300 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40; 1301 break; 1302 default: 1303 break; 1304 } 1305 1306 if (elems->vht_cap_elem) 1307 vht_cap_info = 1308 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1309 1310 memset(¶ms, 0, sizeof(params)); 1311 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1312 vht_cap_info, &conn, 1313 sdata->vif.addr, false, 1314 &csa_ie); 1315 if (err < 0) 1316 return false; 1317 if (err) 1318 return false; 1319 1320 /* Mark the channel unavailable if the reason for the switch is 1321 * regulatory. 1322 */ 1323 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1324 ieee80211_mesh_csa_mark_radar(sdata); 1325 1326 params.chandef = csa_ie.chanreq.oper; 1327 params.count = csa_ie.count; 1328 1329 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1330 IEEE80211_CHAN_DISABLED) || 1331 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1332 NL80211_IFTYPE_MESH_POINT)) { 1333 sdata_info(sdata, 1334 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1335 sdata->vif.addr, 1336 params.chandef.chan->center_freq, 1337 params.chandef.width, 1338 params.chandef.center_freq1, 1339 params.chandef.center_freq2); 1340 return false; 1341 } 1342 1343 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1344 ¶ms.chandef, 1345 NL80211_IFTYPE_MESH_POINT); 1346 if (err < 0) 1347 return false; 1348 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1349 sdata_info(sdata, 1350 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1351 sdata->vif.addr, 1352 params.chandef.chan->center_freq, 1353 params.chandef.width, 1354 params.chandef.center_freq1, 1355 params.chandef.center_freq2); 1356 return false; 1357 } 1358 1359 params.radar_required = err; 1360 1361 if (cfg80211_chandef_identical(¶ms.chandef, 1362 &sdata->vif.bss_conf.chanreq.oper)) { 1363 mcsa_dbg(sdata, 1364 "received csa with an identical chandef, ignoring\n"); 1365 return true; 1366 } 1367 1368 mcsa_dbg(sdata, 1369 "received channel switch announcement to go to channel %d MHz\n", 1370 params.chandef.chan->center_freq); 1371 1372 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1373 if (beacon) { 1374 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1375 if (ifmsh->pre_value >= csa_ie.pre_value) 1376 return false; 1377 ifmsh->pre_value = csa_ie.pre_value; 1378 } 1379 1380 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1381 return false; 1382 1383 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1384 1385 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1386 ¶ms) < 0) 1387 return false; 1388 1389 return true; 1390 } 1391 1392 static void 1393 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1394 struct ieee80211_mgmt *mgmt, size_t len) 1395 { 1396 struct ieee80211_local *local = sdata->local; 1397 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1398 struct sk_buff *presp; 1399 struct beacon_data *bcn; 1400 struct ieee80211_mgmt *hdr; 1401 struct ieee802_11_elems *elems; 1402 size_t baselen; 1403 u8 *pos; 1404 1405 pos = mgmt->u.probe_req.variable; 1406 baselen = (u8 *) pos - (u8 *) mgmt; 1407 if (baselen > len) 1408 return; 1409 1410 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL); 1411 if (!elems) 1412 return; 1413 1414 if (!elems->mesh_id) 1415 goto free; 1416 1417 /* 802.11-2012 10.1.4.3.2 */ 1418 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1419 !is_broadcast_ether_addr(mgmt->da)) || 1420 elems->ssid_len != 0) 1421 goto free; 1422 1423 if (elems->mesh_id_len != 0 && 1424 (elems->mesh_id_len != ifmsh->mesh_id_len || 1425 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1426 goto free; 1427 1428 rcu_read_lock(); 1429 bcn = rcu_dereference(ifmsh->beacon); 1430 1431 if (!bcn) 1432 goto out; 1433 1434 presp = dev_alloc_skb(local->tx_headroom + 1435 bcn->head_len + bcn->tail_len); 1436 if (!presp) 1437 goto out; 1438 1439 skb_reserve(presp, local->tx_headroom); 1440 skb_put_data(presp, bcn->head, bcn->head_len); 1441 skb_put_data(presp, bcn->tail, bcn->tail_len); 1442 hdr = (struct ieee80211_mgmt *) presp->data; 1443 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1444 IEEE80211_STYPE_PROBE_RESP); 1445 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1446 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1447 ieee80211_tx_skb(sdata, presp); 1448 out: 1449 rcu_read_unlock(); 1450 free: 1451 kfree(elems); 1452 } 1453 1454 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1455 u16 stype, 1456 struct ieee80211_mgmt *mgmt, 1457 size_t len, 1458 struct ieee80211_rx_status *rx_status) 1459 { 1460 struct ieee80211_local *local = sdata->local; 1461 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1462 struct ieee802_11_elems *elems; 1463 struct ieee80211_channel *channel; 1464 size_t baselen; 1465 int freq; 1466 enum nl80211_band band = rx_status->band; 1467 1468 /* ignore ProbeResp to foreign address */ 1469 if (stype == IEEE80211_STYPE_PROBE_RESP && 1470 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1471 return; 1472 1473 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1474 if (baselen > len) 1475 return; 1476 1477 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1478 len - baselen, 1479 false, NULL); 1480 if (!elems) 1481 return; 1482 1483 /* ignore non-mesh or secure / insecure mismatch */ 1484 if ((!elems->mesh_id || !elems->mesh_config) || 1485 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1486 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1487 goto free; 1488 1489 if (elems->ds_params) 1490 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1491 else 1492 freq = rx_status->freq; 1493 1494 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1495 1496 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1497 goto free; 1498 1499 if (mesh_matches_local(sdata, elems)) { 1500 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1501 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1502 if (!sdata->u.mesh.user_mpm || 1503 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1504 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1505 mesh_neighbour_update(sdata, mgmt->sa, elems, 1506 rx_status); 1507 1508 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1509 !sdata->vif.bss_conf.csa_active) 1510 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1511 } 1512 1513 if (ifmsh->sync_ops) 1514 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, 1515 elems->mesh_config, rx_status); 1516 free: 1517 kfree(elems); 1518 } 1519 1520 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1521 { 1522 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1523 struct mesh_csa_settings *tmp_csa_settings; 1524 int ret = 0; 1525 1526 /* Reset the TTL value and Initiator flag */ 1527 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1528 ifmsh->chsw_ttl = 0; 1529 1530 /* Remove the CSA and MCSP elements from the beacon */ 1531 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1532 RCU_INIT_POINTER(ifmsh->csa, NULL); 1533 if (tmp_csa_settings) 1534 kfree_rcu(tmp_csa_settings, rcu_head); 1535 ret = ieee80211_mesh_rebuild_beacon(sdata); 1536 if (ret) 1537 return -EINVAL; 1538 1539 *changed |= BSS_CHANGED_BEACON; 1540 1541 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1542 sdata->vif.bss_conf.chanreq.oper.chan->center_freq); 1543 return 0; 1544 } 1545 1546 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1547 struct cfg80211_csa_settings *csa_settings, 1548 u64 *changed) 1549 { 1550 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1551 struct mesh_csa_settings *tmp_csa_settings; 1552 int ret = 0; 1553 1554 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1555 1556 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), 1557 GFP_ATOMIC); 1558 if (!tmp_csa_settings) 1559 return -ENOMEM; 1560 1561 memcpy(&tmp_csa_settings->settings, csa_settings, 1562 sizeof(struct cfg80211_csa_settings)); 1563 1564 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1565 1566 ret = ieee80211_mesh_rebuild_beacon(sdata); 1567 if (ret) { 1568 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1569 RCU_INIT_POINTER(ifmsh->csa, NULL); 1570 kfree_rcu(tmp_csa_settings, rcu_head); 1571 return ret; 1572 } 1573 1574 *changed |= BSS_CHANGED_BEACON; 1575 return 0; 1576 } 1577 1578 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1579 struct ieee80211_mgmt *mgmt, size_t len, 1580 struct ieee802_11_elems *elems) 1581 { 1582 struct ieee80211_mgmt *mgmt_fwd; 1583 struct sk_buff *skb; 1584 struct ieee80211_local *local = sdata->local; 1585 1586 skb = dev_alloc_skb(local->tx_headroom + len); 1587 if (!skb) 1588 return -ENOMEM; 1589 skb_reserve(skb, local->tx_headroom); 1590 mgmt_fwd = skb_put(skb, len); 1591 1592 elems->mesh_chansw_params_ie->mesh_ttl--; 1593 elems->mesh_chansw_params_ie->mesh_flags &= 1594 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1595 1596 memcpy(mgmt_fwd, mgmt, len); 1597 eth_broadcast_addr(mgmt_fwd->da); 1598 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1599 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1600 1601 ieee80211_tx_skb(sdata, skb); 1602 return 0; 1603 } 1604 1605 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1606 struct ieee80211_mgmt *mgmt, size_t len) 1607 { 1608 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1609 struct ieee802_11_elems *elems; 1610 u16 pre_value; 1611 bool fwd_csa = true; 1612 size_t baselen; 1613 u8 *pos; 1614 1615 if (mgmt->u.action.u.measurement.action_code != 1616 WLAN_ACTION_SPCT_CHL_SWITCH) 1617 return; 1618 1619 pos = mgmt->u.action.u.chan_switch.variable; 1620 baselen = offsetof(struct ieee80211_mgmt, 1621 u.action.u.chan_switch.variable); 1622 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL); 1623 if (!elems) 1624 return; 1625 1626 if (!mesh_matches_local(sdata, elems)) 1627 goto free; 1628 1629 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1630 if (!--ifmsh->chsw_ttl) 1631 fwd_csa = false; 1632 1633 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1634 if (ifmsh->pre_value >= pre_value) 1635 goto free; 1636 1637 ifmsh->pre_value = pre_value; 1638 1639 if (!sdata->vif.bss_conf.csa_active && 1640 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1641 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1642 goto free; 1643 } 1644 1645 /* forward or re-broadcast the CSA frame */ 1646 if (fwd_csa) { 1647 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1648 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1649 } 1650 free: 1651 kfree(elems); 1652 } 1653 1654 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1655 struct ieee80211_mgmt *mgmt, 1656 size_t len, 1657 struct ieee80211_rx_status *rx_status) 1658 { 1659 switch (mgmt->u.action.category) { 1660 case WLAN_CATEGORY_SELF_PROTECTED: 1661 switch (mgmt->u.action.u.self_prot.action_code) { 1662 case WLAN_SP_MESH_PEERING_OPEN: 1663 case WLAN_SP_MESH_PEERING_CLOSE: 1664 case WLAN_SP_MESH_PEERING_CONFIRM: 1665 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1666 break; 1667 } 1668 break; 1669 case WLAN_CATEGORY_MESH_ACTION: 1670 if (mesh_action_is_path_sel(mgmt)) 1671 mesh_rx_path_sel_frame(sdata, mgmt, len); 1672 break; 1673 case WLAN_CATEGORY_SPECTRUM_MGMT: 1674 mesh_rx_csa_frame(sdata, mgmt, len); 1675 break; 1676 } 1677 } 1678 1679 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1680 struct sk_buff *skb) 1681 { 1682 struct ieee80211_rx_status *rx_status; 1683 struct ieee80211_mgmt *mgmt; 1684 u16 stype; 1685 1686 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1687 1688 /* mesh already went down */ 1689 if (!sdata->u.mesh.mesh_id_len) 1690 return; 1691 1692 rx_status = IEEE80211_SKB_RXCB(skb); 1693 mgmt = (struct ieee80211_mgmt *) skb->data; 1694 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1695 1696 switch (stype) { 1697 case IEEE80211_STYPE_PROBE_RESP: 1698 case IEEE80211_STYPE_BEACON: 1699 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, 1700 rx_status); 1701 break; 1702 case IEEE80211_STYPE_PROBE_REQ: 1703 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1704 break; 1705 case IEEE80211_STYPE_ACTION: 1706 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1707 break; 1708 } 1709 } 1710 1711 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1712 { 1713 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1714 u32 bit; 1715 u64 changed = 0; 1716 1717 for_each_set_bit(bit, ifmsh->mbss_changed, 1718 sizeof(changed) * BITS_PER_BYTE) { 1719 clear_bit(bit, ifmsh->mbss_changed); 1720 changed |= BIT(bit); 1721 } 1722 1723 if (sdata->vif.bss_conf.enable_beacon && 1724 (changed & (BSS_CHANGED_BEACON | 1725 BSS_CHANGED_HT | 1726 BSS_CHANGED_BASIC_RATES | 1727 BSS_CHANGED_BEACON_INT))) 1728 if (ieee80211_mesh_rebuild_beacon(sdata)) 1729 return; 1730 1731 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1732 } 1733 1734 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1735 { 1736 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1737 1738 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1739 1740 /* mesh already went down */ 1741 if (!sdata->u.mesh.mesh_id_len) 1742 return; 1743 1744 if (ifmsh->preq_queue_len && 1745 time_after(jiffies, 1746 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1747 mesh_path_start_discovery(sdata); 1748 1749 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1750 ieee80211_mesh_housekeeping(sdata); 1751 1752 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1753 ieee80211_mesh_rootpath(sdata); 1754 1755 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1756 mesh_sync_adjust_tsf(sdata); 1757 1758 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1759 mesh_bss_info_changed(sdata); 1760 } 1761 1762 1763 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1764 { 1765 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1766 static u8 zero_addr[ETH_ALEN] = {}; 1767 1768 timer_setup(&ifmsh->housekeeping_timer, 1769 ieee80211_mesh_housekeeping_timer, 0); 1770 1771 ifmsh->accepting_plinks = true; 1772 atomic_set(&ifmsh->mpaths, 0); 1773 mesh_rmc_init(sdata); 1774 ifmsh->last_preq = jiffies; 1775 ifmsh->next_perr = jiffies; 1776 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1777 ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 1778 /* Allocate all mesh structures when creating the first mesh interface. */ 1779 if (!mesh_allocated) 1780 ieee80211s_init(); 1781 1782 mesh_pathtbl_init(sdata); 1783 1784 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1785 timer_setup(&ifmsh->mesh_path_root_timer, 1786 ieee80211_mesh_path_root_timer, 0); 1787 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1788 skb_queue_head_init(&ifmsh->ps.bc_buf); 1789 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1790 spin_lock_init(&ifmsh->sync_offset_lock); 1791 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1792 1793 sdata->vif.bss_conf.bssid = zero_addr; 1794 } 1795 1796 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1797 { 1798 mesh_rmc_free(sdata); 1799 mesh_pathtbl_unregister(sdata); 1800 } 1801