1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008, 2009 open80211s Ltd. 4 * Copyright (C) 2018 - 2023 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 <asm/unaligned.h> 11 #include "ieee80211_i.h" 12 #include "mesh.h" 13 #include "wme.h" 14 #include "driver-ops.h" 15 16 static int mesh_allocated; 17 static struct kmem_cache *rm_cache; 18 19 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) 20 { 21 return (mgmt->u.action.u.mesh_action.action_code == 22 WLAN_MESH_ACTION_HWMP_PATH_SELECTION); 23 } 24 25 void ieee80211s_init(void) 26 { 27 mesh_allocated = 1; 28 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), 29 0, 0, NULL); 30 } 31 32 void ieee80211s_stop(void) 33 { 34 if (!mesh_allocated) 35 return; 36 kmem_cache_destroy(rm_cache); 37 } 38 39 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) 40 { 41 struct ieee80211_sub_if_data *sdata = 42 from_timer(sdata, t, u.mesh.housekeeping_timer); 43 struct ieee80211_local *local = sdata->local; 44 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 45 46 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 47 48 wiphy_work_queue(local->hw.wiphy, &sdata->work); 49 } 50 51 /** 52 * mesh_matches_local - check if the config of a mesh point matches ours 53 * 54 * @sdata: local mesh subif 55 * @ie: information elements of a management frame from the mesh peer 56 * 57 * This function checks if the mesh configuration of a mesh point matches the 58 * local mesh configuration, i.e. if both nodes belong to the same mesh network. 59 * 60 * Returns: %true if both nodes belong to the same mesh 61 */ 62 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, 63 struct ieee802_11_elems *ie) 64 { 65 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 66 u32 basic_rates = 0; 67 struct cfg80211_chan_def sta_chan_def; 68 struct ieee80211_supported_band *sband; 69 u32 vht_cap_info = 0; 70 71 /* 72 * As support for each feature is added, check for matching 73 * - On mesh config capabilities 74 * - Power Save Support En 75 * - Sync support enabled 76 * - Sync support active 77 * - Sync support required from peer 78 * - MDA enabled 79 * - Power management control on fc 80 */ 81 if (!(ifmsh->mesh_id_len == ie->mesh_id_len && 82 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 83 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && 84 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && 85 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && 86 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && 87 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) 88 return false; 89 90 sband = ieee80211_get_sband(sdata); 91 if (!sband) 92 return false; 93 94 ieee80211_sta_get_rates(sdata, ie, sband->band, 95 &basic_rates); 96 97 if (sdata->vif.bss_conf.basic_rates != basic_rates) 98 return false; 99 100 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, 101 NL80211_CHAN_NO_HT); 102 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); 103 104 if (ie->vht_cap_elem) 105 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); 106 107 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 108 ie->vht_operation, ie->ht_operation, 109 &sta_chan_def); 110 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, ie->eht_operation, 111 &sta_chan_def); 112 113 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, 114 &sta_chan_def)) 115 return false; 116 117 return true; 118 } 119 120 /** 121 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 122 * 123 * @ie: information elements of a management frame from the mesh peer 124 * 125 * Returns: %true if the mesh peer is willing to establish peer links 126 */ 127 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 128 { 129 return (ie->mesh_config->meshconf_cap & 130 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 131 } 132 133 /** 134 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 135 * 136 * @sdata: mesh interface in which mesh beacons are going to be updated 137 * 138 * Returns: beacon changed flag if the beacon content changed. 139 */ 140 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 141 { 142 bool free_plinks; 143 u64 changed = 0; 144 145 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 146 * the mesh interface might be able to establish plinks with peers that 147 * are already on the table but are not on PLINK_ESTAB state. However, 148 * in general the mesh interface is not accepting peer link requests 149 * from new peers, and that must be reflected in the beacon 150 */ 151 free_plinks = mesh_plink_availables(sdata); 152 153 if (free_plinks != sdata->u.mesh.accepting_plinks) { 154 sdata->u.mesh.accepting_plinks = free_plinks; 155 changed = BSS_CHANGED_BEACON; 156 } 157 158 return changed; 159 } 160 161 /* 162 * mesh_sta_cleanup - clean up any mesh sta state 163 * 164 * @sta: mesh sta to clean up. 165 */ 166 void mesh_sta_cleanup(struct sta_info *sta) 167 { 168 struct ieee80211_sub_if_data *sdata = sta->sdata; 169 u64 changed = mesh_plink_deactivate(sta); 170 171 if (changed) 172 ieee80211_mbss_info_change_notify(sdata, changed); 173 } 174 175 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 176 { 177 int i; 178 179 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); 180 if (!sdata->u.mesh.rmc) 181 return -ENOMEM; 182 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 183 for (i = 0; i < RMC_BUCKETS; i++) 184 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 185 return 0; 186 } 187 188 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 189 { 190 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 191 struct rmc_entry *p; 192 struct hlist_node *n; 193 int i; 194 195 if (!sdata->u.mesh.rmc) 196 return; 197 198 for (i = 0; i < RMC_BUCKETS; i++) { 199 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 200 hlist_del(&p->list); 201 kmem_cache_free(rm_cache, p); 202 } 203 } 204 205 kfree(rmc); 206 sdata->u.mesh.rmc = NULL; 207 } 208 209 /** 210 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 211 * 212 * @sdata: interface 213 * @sa: source address 214 * @mesh_hdr: mesh_header 215 * 216 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 217 * 218 * Checks using the source address and the mesh sequence number if we have 219 * received this frame lately. If the frame is not in the cache, it is added to 220 * it. 221 */ 222 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 223 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 224 { 225 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 226 u32 seqnum = 0; 227 int entries = 0; 228 u8 idx; 229 struct rmc_entry *p; 230 struct hlist_node *n; 231 232 if (!rmc) 233 return -1; 234 235 /* Don't care about endianness since only match matters */ 236 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 237 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 238 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 239 ++entries; 240 if (time_after(jiffies, p->exp_time) || 241 entries == RMC_QUEUE_MAX_LEN) { 242 hlist_del(&p->list); 243 kmem_cache_free(rm_cache, p); 244 --entries; 245 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 246 return -1; 247 } 248 249 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 250 if (!p) 251 return 0; 252 253 p->seqnum = seqnum; 254 p->exp_time = jiffies + RMC_TIMEOUT; 255 memcpy(p->sa, sa, ETH_ALEN); 256 hlist_add_head(&p->list, &rmc->bucket[idx]); 257 return 0; 258 } 259 260 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 261 struct sk_buff *skb) 262 { 263 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 264 u8 *pos, neighbors; 265 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 266 bool is_connected_to_gate = ifmsh->num_gates > 0 || 267 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 268 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 269 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 270 271 if (skb_tailroom(skb) < 2 + meshconf_len) 272 return -ENOMEM; 273 274 pos = skb_put(skb, 2 + meshconf_len); 275 *pos++ = WLAN_EID_MESH_CONFIG; 276 *pos++ = meshconf_len; 277 278 /* save a pointer for quick updates in pre-tbtt */ 279 ifmsh->meshconf_offset = pos - skb->data; 280 281 /* Active path selection protocol ID */ 282 *pos++ = ifmsh->mesh_pp_id; 283 /* Active path selection metric ID */ 284 *pos++ = ifmsh->mesh_pm_id; 285 /* Congestion control mode identifier */ 286 *pos++ = ifmsh->mesh_cc_id; 287 /* Synchronization protocol identifier */ 288 *pos++ = ifmsh->mesh_sp_id; 289 /* Authentication Protocol identifier */ 290 *pos++ = ifmsh->mesh_auth_id; 291 /* Mesh Formation Info - number of neighbors */ 292 neighbors = atomic_read(&ifmsh->estab_plinks); 293 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 294 *pos++ = (is_connected_to_as << 7) | 295 (neighbors << 1) | 296 is_connected_to_gate; 297 /* Mesh capability */ 298 *pos = 0x00; 299 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 300 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 301 *pos |= ifmsh->accepting_plinks ? 302 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 303 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 304 *pos |= ifmsh->ps_peers_deep_sleep ? 305 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 306 return 0; 307 } 308 309 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 310 { 311 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 312 u8 *pos; 313 314 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 315 return -ENOMEM; 316 317 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 318 *pos++ = WLAN_EID_MESH_ID; 319 *pos++ = ifmsh->mesh_id_len; 320 if (ifmsh->mesh_id_len) 321 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 322 323 return 0; 324 } 325 326 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 327 struct sk_buff *skb) 328 { 329 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 330 u8 *pos; 331 332 /* see IEEE802.11-2012 13.14.6 */ 333 if (ifmsh->ps_peers_light_sleep == 0 && 334 ifmsh->ps_peers_deep_sleep == 0 && 335 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 336 return 0; 337 338 if (skb_tailroom(skb) < 4) 339 return -ENOMEM; 340 341 pos = skb_put(skb, 2 + 2); 342 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 343 *pos++ = 2; 344 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 345 346 return 0; 347 } 348 349 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 350 struct sk_buff *skb) 351 { 352 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 353 u8 offset, len; 354 const u8 *data; 355 356 if (!ifmsh->ie || !ifmsh->ie_len) 357 return 0; 358 359 /* fast-forward to vendor IEs */ 360 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 361 362 if (offset < ifmsh->ie_len) { 363 len = ifmsh->ie_len - offset; 364 data = ifmsh->ie + offset; 365 if (skb_tailroom(skb) < len) 366 return -ENOMEM; 367 skb_put_data(skb, data, len); 368 } 369 370 return 0; 371 } 372 373 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 374 { 375 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 376 u8 len = 0; 377 const u8 *data; 378 379 if (!ifmsh->ie || !ifmsh->ie_len) 380 return 0; 381 382 /* find RSN IE */ 383 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 384 if (!data) 385 return 0; 386 387 len = data[1] + 2; 388 389 if (skb_tailroom(skb) < len) 390 return -ENOMEM; 391 skb_put_data(skb, data, len); 392 393 return 0; 394 } 395 396 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 397 struct sk_buff *skb) 398 { 399 struct ieee80211_chanctx_conf *chanctx_conf; 400 struct ieee80211_channel *chan; 401 u8 *pos; 402 403 if (skb_tailroom(skb) < 3) 404 return -ENOMEM; 405 406 rcu_read_lock(); 407 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 408 if (WARN_ON(!chanctx_conf)) { 409 rcu_read_unlock(); 410 return -EINVAL; 411 } 412 chan = chanctx_conf->def.chan; 413 rcu_read_unlock(); 414 415 pos = skb_put(skb, 2 + 1); 416 *pos++ = WLAN_EID_DS_PARAMS; 417 *pos++ = 1; 418 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 419 420 return 0; 421 } 422 423 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 424 struct sk_buff *skb) 425 { 426 struct ieee80211_supported_band *sband; 427 u8 *pos; 428 429 sband = ieee80211_get_sband(sdata); 430 if (!sband) 431 return -EINVAL; 432 433 /* HT not allowed in 6 GHz */ 434 if (sband->band == NL80211_BAND_6GHZ) 435 return 0; 436 437 if (!sband->ht_cap.ht_supported || 438 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 439 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 440 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 441 return 0; 442 443 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 444 return -ENOMEM; 445 446 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 447 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 448 449 return 0; 450 } 451 452 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 453 struct sk_buff *skb) 454 { 455 struct ieee80211_local *local = sdata->local; 456 struct ieee80211_chanctx_conf *chanctx_conf; 457 struct ieee80211_channel *channel; 458 struct ieee80211_supported_band *sband; 459 struct ieee80211_sta_ht_cap *ht_cap; 460 u8 *pos; 461 462 rcu_read_lock(); 463 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 464 if (WARN_ON(!chanctx_conf)) { 465 rcu_read_unlock(); 466 return -EINVAL; 467 } 468 channel = chanctx_conf->def.chan; 469 rcu_read_unlock(); 470 471 sband = local->hw.wiphy->bands[channel->band]; 472 ht_cap = &sband->ht_cap; 473 474 /* HT not allowed in 6 GHz */ 475 if (sband->band == NL80211_BAND_6GHZ) 476 return 0; 477 478 if (!ht_cap->ht_supported || 479 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 480 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 481 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 482 return 0; 483 484 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 485 return -ENOMEM; 486 487 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 488 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, 489 sdata->vif.bss_conf.ht_operation_mode, 490 false); 491 492 return 0; 493 } 494 495 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 496 struct sk_buff *skb) 497 { 498 struct ieee80211_supported_band *sband; 499 u8 *pos; 500 501 sband = ieee80211_get_sband(sdata); 502 if (!sband) 503 return -EINVAL; 504 505 /* VHT not allowed in 6 GHz */ 506 if (sband->band == NL80211_BAND_6GHZ) 507 return 0; 508 509 if (!sband->vht_cap.vht_supported || 510 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 511 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 512 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 513 return 0; 514 515 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 516 return -ENOMEM; 517 518 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 519 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 520 521 return 0; 522 } 523 524 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 525 struct sk_buff *skb) 526 { 527 struct ieee80211_local *local = sdata->local; 528 struct ieee80211_chanctx_conf *chanctx_conf; 529 struct ieee80211_channel *channel; 530 struct ieee80211_supported_band *sband; 531 struct ieee80211_sta_vht_cap *vht_cap; 532 u8 *pos; 533 534 rcu_read_lock(); 535 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 536 if (WARN_ON(!chanctx_conf)) { 537 rcu_read_unlock(); 538 return -EINVAL; 539 } 540 channel = chanctx_conf->def.chan; 541 rcu_read_unlock(); 542 543 sband = local->hw.wiphy->bands[channel->band]; 544 vht_cap = &sband->vht_cap; 545 546 /* VHT not allowed in 6 GHz */ 547 if (sband->band == NL80211_BAND_6GHZ) 548 return 0; 549 550 if (!vht_cap->vht_supported || 551 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 552 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 553 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 554 return 0; 555 556 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 557 return -ENOMEM; 558 559 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 560 ieee80211_ie_build_vht_oper(pos, vht_cap, 561 &sdata->vif.bss_conf.chandef); 562 563 return 0; 564 } 565 566 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 567 struct sk_buff *skb, u8 ie_len) 568 { 569 const struct ieee80211_sta_he_cap *he_cap; 570 struct ieee80211_supported_band *sband; 571 u8 *pos; 572 573 sband = ieee80211_get_sband(sdata); 574 if (!sband) 575 return -EINVAL; 576 577 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 578 579 if (!he_cap || 580 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 581 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 582 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 583 return 0; 584 585 if (skb_tailroom(skb) < ie_len) 586 return -ENOMEM; 587 588 pos = skb_put(skb, ie_len); 589 ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len); 590 591 return 0; 592 } 593 594 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 595 struct sk_buff *skb) 596 { 597 const struct ieee80211_sta_he_cap *he_cap; 598 struct ieee80211_supported_band *sband; 599 u32 len; 600 u8 *pos; 601 602 sband = ieee80211_get_sband(sdata); 603 if (!sband) 604 return -EINVAL; 605 606 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 607 if (!he_cap || 608 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 609 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 610 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 611 return 0; 612 613 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 614 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) 615 len += sizeof(struct ieee80211_he_6ghz_oper); 616 617 if (skb_tailroom(skb) < len) 618 return -ENOMEM; 619 620 pos = skb_put(skb, len); 621 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef); 622 623 return 0; 624 } 625 626 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 627 struct sk_buff *skb) 628 { 629 struct ieee80211_supported_band *sband; 630 const struct ieee80211_sband_iftype_data *iftd; 631 632 sband = ieee80211_get_sband(sdata); 633 if (!sband) 634 return -EINVAL; 635 636 iftd = ieee80211_get_sband_iftype_data(sband, 637 NL80211_IFTYPE_MESH_POINT); 638 /* The device doesn't support HE in mesh mode or at all */ 639 if (!iftd) 640 return 0; 641 642 ieee80211_ie_build_he_6ghz_cap(sdata, sdata->deflink.smps_mode, skb); 643 return 0; 644 } 645 646 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 647 struct sk_buff *skb, u8 ie_len) 648 { 649 const struct ieee80211_sta_he_cap *he_cap; 650 const struct ieee80211_sta_eht_cap *eht_cap; 651 struct ieee80211_supported_band *sband; 652 u8 *pos; 653 654 sband = ieee80211_get_sband(sdata); 655 if (!sband) 656 return -EINVAL; 657 658 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 659 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 660 if (!he_cap || !eht_cap || 661 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 662 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 663 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 664 return 0; 665 666 if (skb_tailroom(skb) < ie_len) 667 return -ENOMEM; 668 669 pos = skb_put(skb, ie_len); 670 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + ie_len, false); 671 672 return 0; 673 } 674 675 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 676 { 677 const struct ieee80211_sta_eht_cap *eht_cap; 678 struct ieee80211_supported_band *sband; 679 u32 len; 680 u8 *pos; 681 682 sband = ieee80211_get_sband(sdata); 683 if (!sband) 684 return -EINVAL; 685 686 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 687 if (!eht_cap || 688 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 689 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 690 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 691 return 0; 692 693 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 694 offsetof(struct ieee80211_eht_operation_info, optional); 695 696 if (skb_tailroom(skb) < len) 697 return -ENOMEM; 698 699 pos = skb_put(skb, len); 700 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chandef, eht_cap); 701 702 return 0; 703 } 704 705 static void ieee80211_mesh_path_timer(struct timer_list *t) 706 { 707 struct ieee80211_sub_if_data *sdata = 708 from_timer(sdata, t, u.mesh.mesh_path_timer); 709 710 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 711 } 712 713 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 714 { 715 struct ieee80211_sub_if_data *sdata = 716 from_timer(sdata, t, u.mesh.mesh_path_root_timer); 717 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 718 719 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 720 721 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 722 } 723 724 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 725 { 726 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 727 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 728 else { 729 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 730 /* stop running timer */ 731 del_timer_sync(&ifmsh->mesh_path_root_timer); 732 } 733 } 734 735 static void 736 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 737 u8 *ie, u8 ie_len) 738 { 739 struct ieee80211_supported_band *sband; 740 const struct element *cap; 741 const struct ieee80211_he_operation *he_oper = NULL; 742 743 sband = ieee80211_get_sband(sdata); 744 if (!sband) 745 return; 746 747 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 748 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 749 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 750 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 751 return; 752 753 sdata->vif.bss_conf.he_support = true; 754 755 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 756 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 757 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 758 he_oper = (void *)(cap->data + 1); 759 760 if (he_oper) 761 sdata->vif.bss_conf.he_oper.params = 762 __le32_to_cpu(he_oper->he_oper_params); 763 764 sdata->vif.bss_conf.eht_support = 765 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 766 } 767 768 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 769 struct sk_buff *skb, u32 ctrl_flags) 770 { 771 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 772 struct ieee80211_mesh_fast_tx *entry; 773 struct ieee80211s_hdr *meshhdr; 774 u8 sa[ETH_ALEN] __aligned(2); 775 struct tid_ampdu_tx *tid_tx; 776 struct sta_info *sta; 777 bool copy_sa = false; 778 u16 ethertype; 779 u8 tid; 780 781 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 782 return false; 783 784 if (ifmsh->mshcfg.dot11MeshNolearn) 785 return false; 786 787 /* Add support for these cases later */ 788 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 789 return false; 790 791 if (is_multicast_ether_addr(skb->data)) 792 return false; 793 794 ethertype = (skb->data[12] << 8) | skb->data[13]; 795 if (ethertype < ETH_P_802_3_MIN) 796 return false; 797 798 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) 799 return false; 800 801 if (skb->ip_summed == CHECKSUM_PARTIAL) { 802 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 803 if (skb_checksum_help(skb)) 804 return false; 805 } 806 807 entry = mesh_fast_tx_get(sdata, skb->data); 808 if (!entry) 809 return false; 810 811 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 812 return false; 813 814 sta = rcu_dereference(entry->mpath->next_hop); 815 if (!sta) 816 return false; 817 818 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 819 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 820 if (tid_tx) { 821 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 822 return false; 823 if (tid_tx->timeout) 824 tid_tx->last_tx = jiffies; 825 } 826 827 skb = skb_share_check(skb, GFP_ATOMIC); 828 if (!skb) 829 return true; 830 831 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 832 833 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 834 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 835 /* preserve SA from eth header for 6-addr frames */ 836 ether_addr_copy(sa, skb->data + ETH_ALEN); 837 copy_sa = true; 838 } 839 840 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 841 entry->hdrlen); 842 843 meshhdr = (struct ieee80211s_hdr *)skb->data; 844 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 845 &meshhdr->seqnum); 846 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 847 if (copy_sa) 848 ether_addr_copy(meshhdr->eaddr2, sa); 849 850 skb_push(skb, 2 * ETH_ALEN); 851 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 852 entry->mpath->dst, sdata->vif.addr); 853 854 return true; 855 } 856 857 /** 858 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 859 * @hdr: 802.11 frame header 860 * @fc: frame control field 861 * @meshda: destination address in the mesh 862 * @meshsa: source address in the mesh. Same as TA, as frame is 863 * locally originated. 864 * 865 * Returns: the length of the 802.11 frame header (excludes mesh control header) 866 */ 867 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 868 const u8 *meshda, const u8 *meshsa) 869 { 870 if (is_multicast_ether_addr(meshda)) { 871 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 872 /* DA TA SA */ 873 memcpy(hdr->addr1, meshda, ETH_ALEN); 874 memcpy(hdr->addr2, meshsa, ETH_ALEN); 875 memcpy(hdr->addr3, meshsa, ETH_ALEN); 876 return 24; 877 } else { 878 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 879 /* RA TA DA SA */ 880 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 881 memcpy(hdr->addr2, meshsa, ETH_ALEN); 882 memcpy(hdr->addr3, meshda, ETH_ALEN); 883 memcpy(hdr->addr4, meshsa, ETH_ALEN); 884 return 30; 885 } 886 } 887 888 /** 889 * ieee80211_new_mesh_header - create a new mesh header 890 * @sdata: mesh interface to be used 891 * @meshhdr: uninitialized mesh header 892 * @addr4or5: 1st address in the ae header, which may correspond to address 4 893 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 894 * be NULL. 895 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 896 * mesh frame 897 * 898 * Returns: the header length 899 */ 900 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 901 struct ieee80211s_hdr *meshhdr, 902 const char *addr4or5, const char *addr6) 903 { 904 if (WARN_ON(!addr4or5 && addr6)) 905 return 0; 906 907 memset(meshhdr, 0, sizeof(*meshhdr)); 908 909 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 910 911 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 912 &meshhdr->seqnum); 913 if (addr4or5 && !addr6) { 914 meshhdr->flags |= MESH_FLAGS_AE_A4; 915 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 916 return 2 * ETH_ALEN; 917 } else if (addr4or5 && addr6) { 918 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 919 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 920 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 921 return 3 * ETH_ALEN; 922 } 923 924 return ETH_ALEN; 925 } 926 927 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 928 { 929 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 930 u64 changed; 931 932 if (ifmsh->mshcfg.plink_timeout > 0) 933 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 934 mesh_path_expire(sdata); 935 936 changed = mesh_accept_plinks_update(sdata); 937 ieee80211_mbss_info_change_notify(sdata, changed); 938 939 mesh_fast_tx_gc(sdata); 940 941 mod_timer(&ifmsh->housekeeping_timer, 942 round_jiffies(jiffies + 943 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 944 } 945 946 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 947 { 948 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 949 u32 interval; 950 951 mesh_path_tx_root_frame(sdata); 952 953 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 954 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 955 else 956 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 957 958 mod_timer(&ifmsh->mesh_path_root_timer, 959 round_jiffies(TU_TO_EXP_TIME(interval))); 960 } 961 962 static int 963 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 964 { 965 struct beacon_data *bcn; 966 int head_len, tail_len; 967 struct sk_buff *skb; 968 struct ieee80211_mgmt *mgmt; 969 struct ieee80211_chanctx_conf *chanctx_conf; 970 struct mesh_csa_settings *csa; 971 enum nl80211_band band; 972 u8 ie_len_he_cap, ie_len_eht_cap; 973 u8 *pos; 974 struct ieee80211_sub_if_data *sdata; 975 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 976 977 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 978 rcu_read_lock(); 979 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 980 band = chanctx_conf->def.chan->band; 981 rcu_read_unlock(); 982 983 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata, 984 NL80211_IFTYPE_MESH_POINT); 985 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata, 986 NL80211_IFTYPE_MESH_POINT); 987 head_len = hdr_len + 988 2 + /* NULL SSID */ 989 /* Channel Switch Announcement */ 990 2 + sizeof(struct ieee80211_channel_sw_ie) + 991 /* Mesh Channel Switch Parameters */ 992 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 993 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 994 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 995 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 996 2 + 8 + /* supported rates */ 997 2 + 3; /* DS params */ 998 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 999 2 + sizeof(struct ieee80211_ht_cap) + 1000 2 + sizeof(struct ieee80211_ht_operation) + 1001 2 + ifmsh->mesh_id_len + 1002 2 + sizeof(struct ieee80211_meshconf_ie) + 1003 2 + sizeof(__le16) + /* awake window */ 1004 2 + sizeof(struct ieee80211_vht_cap) + 1005 2 + sizeof(struct ieee80211_vht_operation) + 1006 ie_len_he_cap + 1007 2 + 1 + sizeof(struct ieee80211_he_operation) + 1008 sizeof(struct ieee80211_he_6ghz_oper) + 1009 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 1010 ie_len_eht_cap + 1011 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 1012 offsetof(struct ieee80211_eht_operation_info, optional) + 1013 ifmsh->ie_len; 1014 1015 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 1016 /* need an skb for IE builders to operate on */ 1017 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 1018 1019 if (!bcn || !skb) 1020 goto out_free; 1021 1022 /* 1023 * pointers go into the block we allocated, 1024 * memory is | beacon_data | head | tail | 1025 */ 1026 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1027 1028 /* fill in the head */ 1029 mgmt = skb_put_zero(skb, hdr_len); 1030 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1031 IEEE80211_STYPE_BEACON); 1032 eth_broadcast_addr(mgmt->da); 1033 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1034 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1035 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1036 mgmt->u.beacon.beacon_int = 1037 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1038 mgmt->u.beacon.capab_info |= cpu_to_le16( 1039 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1040 1041 pos = skb_put(skb, 2); 1042 *pos++ = WLAN_EID_SSID; 1043 *pos++ = 0x0; 1044 1045 rcu_read_lock(); 1046 csa = rcu_dereference(ifmsh->csa); 1047 if (csa) { 1048 enum nl80211_channel_type ct; 1049 struct cfg80211_chan_def *chandef; 1050 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1051 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1052 1053 pos = skb_put_zero(skb, ie_len); 1054 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1055 *pos++ = 3; 1056 *pos++ = 0x0; 1057 *pos++ = ieee80211_frequency_to_channel( 1058 csa->settings.chandef.chan->center_freq); 1059 bcn->cntdwn_current_counter = csa->settings.count; 1060 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1061 *pos++ = csa->settings.count; 1062 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1063 *pos++ = 6; 1064 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1065 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1066 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1067 } else { 1068 *pos++ = ifmsh->chsw_ttl; 1069 } 1070 *pos++ |= csa->settings.block_tx ? 1071 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1072 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1073 pos += 2; 1074 put_unaligned_le16(ifmsh->pre_value, pos); 1075 pos += 2; 1076 1077 switch (csa->settings.chandef.width) { 1078 case NL80211_CHAN_WIDTH_40: 1079 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1080 pos = skb_put_zero(skb, ie_len); 1081 1082 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1083 *pos++ = 1; /* len */ 1084 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1085 if (ct == NL80211_CHAN_HT40PLUS) 1086 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1087 else 1088 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1089 break; 1090 case NL80211_CHAN_WIDTH_80: 1091 case NL80211_CHAN_WIDTH_80P80: 1092 case NL80211_CHAN_WIDTH_160: 1093 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1094 ie_len = 2 + 2 + 1095 sizeof(struct ieee80211_wide_bw_chansw_ie); 1096 pos = skb_put_zero(skb, ie_len); 1097 1098 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1099 *pos++ = 5; /* len */ 1100 /* put sub IE */ 1101 chandef = &csa->settings.chandef; 1102 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1103 break; 1104 default: 1105 break; 1106 } 1107 } 1108 rcu_read_unlock(); 1109 1110 if (ieee80211_add_srates_ie(sdata, skb, true, band) || 1111 mesh_add_ds_params_ie(sdata, skb)) 1112 goto out_free; 1113 1114 bcn->head_len = skb->len; 1115 memcpy(bcn->head, skb->data, bcn->head_len); 1116 1117 /* now the tail */ 1118 skb_trim(skb, 0); 1119 bcn->tail = bcn->head + bcn->head_len; 1120 1121 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || 1122 mesh_add_rsn_ie(sdata, skb) || 1123 mesh_add_ht_cap_ie(sdata, skb) || 1124 mesh_add_ht_oper_ie(sdata, skb) || 1125 mesh_add_meshid_ie(sdata, skb) || 1126 mesh_add_meshconf_ie(sdata, skb) || 1127 mesh_add_awake_window_ie(sdata, skb) || 1128 mesh_add_vht_cap_ie(sdata, skb) || 1129 mesh_add_vht_oper_ie(sdata, skb) || 1130 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1131 mesh_add_he_oper_ie(sdata, skb) || 1132 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1133 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1134 mesh_add_eht_oper_ie(sdata, skb) || 1135 mesh_add_vendor_ies(sdata, skb)) 1136 goto out_free; 1137 1138 bcn->tail_len = skb->len; 1139 memcpy(bcn->tail, skb->data, bcn->tail_len); 1140 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1141 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1142 (bcn->tail + ifmsh->meshconf_offset); 1143 1144 dev_kfree_skb(skb); 1145 rcu_assign_pointer(ifmsh->beacon, bcn); 1146 return 0; 1147 out_free: 1148 kfree(bcn); 1149 dev_kfree_skb(skb); 1150 return -ENOMEM; 1151 } 1152 1153 static int 1154 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1155 { 1156 struct beacon_data *old_bcn; 1157 int ret; 1158 1159 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1160 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1161 if (ret) 1162 /* just reuse old beacon */ 1163 return ret; 1164 1165 if (old_bcn) 1166 kfree_rcu(old_bcn, rcu_head); 1167 return 0; 1168 } 1169 1170 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1171 u64 changed) 1172 { 1173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1174 unsigned long bits = changed; 1175 u32 bit; 1176 1177 if (!bits) 1178 return; 1179 1180 /* if we race with running work, worst case this work becomes a noop */ 1181 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) 1182 set_bit(bit, ifmsh->mbss_changed); 1183 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1184 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1185 } 1186 1187 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1188 { 1189 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1190 struct ieee80211_local *local = sdata->local; 1191 u64 changed = BSS_CHANGED_BEACON | 1192 BSS_CHANGED_BEACON_ENABLED | 1193 BSS_CHANGED_HT | 1194 BSS_CHANGED_BASIC_RATES | 1195 BSS_CHANGED_BEACON_INT | 1196 BSS_CHANGED_MCAST_RATE; 1197 1198 local->fif_other_bss++; 1199 /* mesh ifaces must set allmulti to forward mcast traffic */ 1200 atomic_inc(&local->iff_allmultis); 1201 ieee80211_configure_filter(local); 1202 1203 ifmsh->mesh_cc_id = 0; /* Disabled */ 1204 /* register sync ops from extensible synchronization framework */ 1205 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1206 ifmsh->sync_offset_clockdrift_max = 0; 1207 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1208 ieee80211_mesh_root_setup(ifmsh); 1209 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1210 sdata->vif.bss_conf.ht_operation_mode = 1211 ifmsh->mshcfg.ht_opmode; 1212 sdata->vif.bss_conf.enable_beacon = true; 1213 1214 changed |= ieee80211_mps_local_status_update(sdata); 1215 1216 if (ieee80211_mesh_build_beacon(ifmsh)) { 1217 ieee80211_stop_mesh(sdata); 1218 return -ENOMEM; 1219 } 1220 1221 ieee80211_recalc_dtim(local, sdata); 1222 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1223 1224 netif_carrier_on(sdata->dev); 1225 return 0; 1226 } 1227 1228 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1229 { 1230 struct ieee80211_local *local = sdata->local; 1231 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1232 struct beacon_data *bcn; 1233 1234 netif_carrier_off(sdata->dev); 1235 1236 /* flush STAs and mpaths on this iface */ 1237 sta_info_flush(sdata); 1238 ieee80211_free_keys(sdata, true); 1239 mesh_path_flush_by_iface(sdata); 1240 1241 /* stop the beacon */ 1242 ifmsh->mesh_id_len = 0; 1243 sdata->vif.bss_conf.enable_beacon = false; 1244 sdata->beacon_rate_set = false; 1245 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1246 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1247 BSS_CHANGED_BEACON_ENABLED); 1248 1249 /* remove beacon */ 1250 bcn = sdata_dereference(ifmsh->beacon, sdata); 1251 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1252 kfree_rcu(bcn, rcu_head); 1253 1254 /* free all potentially still buffered group-addressed frames */ 1255 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1256 skb_queue_purge(&ifmsh->ps.bc_buf); 1257 1258 del_timer_sync(&sdata->u.mesh.housekeeping_timer); 1259 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); 1260 del_timer_sync(&sdata->u.mesh.mesh_path_timer); 1261 1262 /* clear any mesh work (for next join) we may have accrued */ 1263 ifmsh->wrkq_flags = 0; 1264 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1265 1266 local->fif_other_bss--; 1267 atomic_dec(&local->iff_allmultis); 1268 ieee80211_configure_filter(local); 1269 } 1270 1271 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1272 { 1273 int err; 1274 1275 /* if the current channel is a DFS channel, mark the channel as 1276 * unavailable. 1277 */ 1278 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1279 &sdata->vif.bss_conf.chandef, 1280 NL80211_IFTYPE_MESH_POINT); 1281 if (err > 0) 1282 cfg80211_radar_event(sdata->local->hw.wiphy, 1283 &sdata->vif.bss_conf.chandef, GFP_ATOMIC); 1284 } 1285 1286 static bool 1287 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1288 struct ieee802_11_elems *elems, bool beacon) 1289 { 1290 struct cfg80211_csa_settings params; 1291 struct ieee80211_csa_ie csa_ie; 1292 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1293 struct ieee80211_supported_band *sband; 1294 int err; 1295 ieee80211_conn_flags_t conn_flags = 0; 1296 u32 vht_cap_info = 0; 1297 1298 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1299 1300 sband = ieee80211_get_sband(sdata); 1301 if (!sband) 1302 return false; 1303 1304 switch (sdata->vif.bss_conf.chandef.width) { 1305 case NL80211_CHAN_WIDTH_20_NOHT: 1306 conn_flags |= IEEE80211_CONN_DISABLE_HT; 1307 fallthrough; 1308 case NL80211_CHAN_WIDTH_20: 1309 conn_flags |= IEEE80211_CONN_DISABLE_40MHZ; 1310 fallthrough; 1311 case NL80211_CHAN_WIDTH_40: 1312 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 1313 break; 1314 default: 1315 break; 1316 } 1317 1318 if (elems->vht_cap_elem) 1319 vht_cap_info = 1320 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1321 1322 memset(¶ms, 0, sizeof(params)); 1323 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1324 vht_cap_info, 1325 conn_flags, sdata->vif.addr, 1326 &csa_ie); 1327 if (err < 0) 1328 return false; 1329 if (err) 1330 return false; 1331 1332 /* Mark the channel unavailable if the reason for the switch is 1333 * regulatory. 1334 */ 1335 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1336 ieee80211_mesh_csa_mark_radar(sdata); 1337 1338 params.chandef = csa_ie.chandef; 1339 params.count = csa_ie.count; 1340 1341 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1342 IEEE80211_CHAN_DISABLED) || 1343 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1344 NL80211_IFTYPE_MESH_POINT)) { 1345 sdata_info(sdata, 1346 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1347 sdata->vif.addr, 1348 params.chandef.chan->center_freq, 1349 params.chandef.width, 1350 params.chandef.center_freq1, 1351 params.chandef.center_freq2); 1352 return false; 1353 } 1354 1355 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1356 ¶ms.chandef, 1357 NL80211_IFTYPE_MESH_POINT); 1358 if (err < 0) 1359 return false; 1360 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1361 sdata_info(sdata, 1362 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1363 sdata->vif.addr, 1364 params.chandef.chan->center_freq, 1365 params.chandef.width, 1366 params.chandef.center_freq1, 1367 params.chandef.center_freq2); 1368 return false; 1369 } 1370 1371 params.radar_required = err; 1372 1373 if (cfg80211_chandef_identical(¶ms.chandef, 1374 &sdata->vif.bss_conf.chandef)) { 1375 mcsa_dbg(sdata, 1376 "received csa with an identical chandef, ignoring\n"); 1377 return true; 1378 } 1379 1380 mcsa_dbg(sdata, 1381 "received channel switch announcement to go to channel %d MHz\n", 1382 params.chandef.chan->center_freq); 1383 1384 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1385 if (beacon) { 1386 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1387 if (ifmsh->pre_value >= csa_ie.pre_value) 1388 return false; 1389 ifmsh->pre_value = csa_ie.pre_value; 1390 } 1391 1392 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1393 return false; 1394 1395 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1396 1397 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1398 ¶ms) < 0) 1399 return false; 1400 1401 return true; 1402 } 1403 1404 static void 1405 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1406 struct ieee80211_mgmt *mgmt, size_t len) 1407 { 1408 struct ieee80211_local *local = sdata->local; 1409 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1410 struct sk_buff *presp; 1411 struct beacon_data *bcn; 1412 struct ieee80211_mgmt *hdr; 1413 struct ieee802_11_elems *elems; 1414 size_t baselen; 1415 u8 *pos; 1416 1417 pos = mgmt->u.probe_req.variable; 1418 baselen = (u8 *) pos - (u8 *) mgmt; 1419 if (baselen > len) 1420 return; 1421 1422 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL); 1423 if (!elems) 1424 return; 1425 1426 if (!elems->mesh_id) 1427 goto free; 1428 1429 /* 802.11-2012 10.1.4.3.2 */ 1430 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1431 !is_broadcast_ether_addr(mgmt->da)) || 1432 elems->ssid_len != 0) 1433 goto free; 1434 1435 if (elems->mesh_id_len != 0 && 1436 (elems->mesh_id_len != ifmsh->mesh_id_len || 1437 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1438 goto free; 1439 1440 rcu_read_lock(); 1441 bcn = rcu_dereference(ifmsh->beacon); 1442 1443 if (!bcn) 1444 goto out; 1445 1446 presp = dev_alloc_skb(local->tx_headroom + 1447 bcn->head_len + bcn->tail_len); 1448 if (!presp) 1449 goto out; 1450 1451 skb_reserve(presp, local->tx_headroom); 1452 skb_put_data(presp, bcn->head, bcn->head_len); 1453 skb_put_data(presp, bcn->tail, bcn->tail_len); 1454 hdr = (struct ieee80211_mgmt *) presp->data; 1455 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1456 IEEE80211_STYPE_PROBE_RESP); 1457 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1458 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1459 ieee80211_tx_skb(sdata, presp); 1460 out: 1461 rcu_read_unlock(); 1462 free: 1463 kfree(elems); 1464 } 1465 1466 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1467 u16 stype, 1468 struct ieee80211_mgmt *mgmt, 1469 size_t len, 1470 struct ieee80211_rx_status *rx_status) 1471 { 1472 struct ieee80211_local *local = sdata->local; 1473 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1474 struct ieee802_11_elems *elems; 1475 struct ieee80211_channel *channel; 1476 size_t baselen; 1477 int freq; 1478 enum nl80211_band band = rx_status->band; 1479 1480 /* ignore ProbeResp to foreign address */ 1481 if (stype == IEEE80211_STYPE_PROBE_RESP && 1482 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1483 return; 1484 1485 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1486 if (baselen > len) 1487 return; 1488 1489 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1490 len - baselen, 1491 false, NULL); 1492 if (!elems) 1493 return; 1494 1495 /* ignore non-mesh or secure / unsecure mismatch */ 1496 if ((!elems->mesh_id || !elems->mesh_config) || 1497 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1498 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1499 goto free; 1500 1501 if (elems->ds_params) 1502 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1503 else 1504 freq = rx_status->freq; 1505 1506 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1507 1508 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1509 goto free; 1510 1511 if (mesh_matches_local(sdata, elems)) { 1512 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1513 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1514 if (!sdata->u.mesh.user_mpm || 1515 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1516 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1517 mesh_neighbour_update(sdata, mgmt->sa, elems, 1518 rx_status); 1519 1520 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1521 !sdata->vif.bss_conf.csa_active) 1522 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1523 } 1524 1525 if (ifmsh->sync_ops) 1526 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, 1527 elems->mesh_config, rx_status); 1528 free: 1529 kfree(elems); 1530 } 1531 1532 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1533 { 1534 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1535 struct mesh_csa_settings *tmp_csa_settings; 1536 int ret = 0; 1537 1538 /* Reset the TTL value and Initiator flag */ 1539 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1540 ifmsh->chsw_ttl = 0; 1541 1542 /* Remove the CSA and MCSP elements from the beacon */ 1543 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1544 RCU_INIT_POINTER(ifmsh->csa, NULL); 1545 if (tmp_csa_settings) 1546 kfree_rcu(tmp_csa_settings, rcu_head); 1547 ret = ieee80211_mesh_rebuild_beacon(sdata); 1548 if (ret) 1549 return -EINVAL; 1550 1551 *changed |= BSS_CHANGED_BEACON; 1552 1553 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1554 sdata->vif.bss_conf.chandef.chan->center_freq); 1555 return 0; 1556 } 1557 1558 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1559 struct cfg80211_csa_settings *csa_settings, 1560 u64 *changed) 1561 { 1562 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1563 struct mesh_csa_settings *tmp_csa_settings; 1564 int ret = 0; 1565 1566 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1567 1568 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), 1569 GFP_ATOMIC); 1570 if (!tmp_csa_settings) 1571 return -ENOMEM; 1572 1573 memcpy(&tmp_csa_settings->settings, csa_settings, 1574 sizeof(struct cfg80211_csa_settings)); 1575 1576 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1577 1578 ret = ieee80211_mesh_rebuild_beacon(sdata); 1579 if (ret) { 1580 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1581 RCU_INIT_POINTER(ifmsh->csa, NULL); 1582 kfree_rcu(tmp_csa_settings, rcu_head); 1583 return ret; 1584 } 1585 1586 *changed |= BSS_CHANGED_BEACON; 1587 return 0; 1588 } 1589 1590 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1591 struct ieee80211_mgmt *mgmt, size_t len, 1592 struct ieee802_11_elems *elems) 1593 { 1594 struct ieee80211_mgmt *mgmt_fwd; 1595 struct sk_buff *skb; 1596 struct ieee80211_local *local = sdata->local; 1597 1598 skb = dev_alloc_skb(local->tx_headroom + len); 1599 if (!skb) 1600 return -ENOMEM; 1601 skb_reserve(skb, local->tx_headroom); 1602 mgmt_fwd = skb_put(skb, len); 1603 1604 elems->mesh_chansw_params_ie->mesh_ttl--; 1605 elems->mesh_chansw_params_ie->mesh_flags &= 1606 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1607 1608 memcpy(mgmt_fwd, mgmt, len); 1609 eth_broadcast_addr(mgmt_fwd->da); 1610 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1611 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1612 1613 ieee80211_tx_skb(sdata, skb); 1614 return 0; 1615 } 1616 1617 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1618 struct ieee80211_mgmt *mgmt, size_t len) 1619 { 1620 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1621 struct ieee802_11_elems *elems; 1622 u16 pre_value; 1623 bool fwd_csa = true; 1624 size_t baselen; 1625 u8 *pos; 1626 1627 if (mgmt->u.action.u.measurement.action_code != 1628 WLAN_ACTION_SPCT_CHL_SWITCH) 1629 return; 1630 1631 pos = mgmt->u.action.u.chan_switch.variable; 1632 baselen = offsetof(struct ieee80211_mgmt, 1633 u.action.u.chan_switch.variable); 1634 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL); 1635 if (!elems) 1636 return; 1637 1638 if (!mesh_matches_local(sdata, elems)) 1639 goto free; 1640 1641 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1642 if (!--ifmsh->chsw_ttl) 1643 fwd_csa = false; 1644 1645 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1646 if (ifmsh->pre_value >= pre_value) 1647 goto free; 1648 1649 ifmsh->pre_value = pre_value; 1650 1651 if (!sdata->vif.bss_conf.csa_active && 1652 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1653 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1654 goto free; 1655 } 1656 1657 /* forward or re-broadcast the CSA frame */ 1658 if (fwd_csa) { 1659 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1660 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1661 } 1662 free: 1663 kfree(elems); 1664 } 1665 1666 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1667 struct ieee80211_mgmt *mgmt, 1668 size_t len, 1669 struct ieee80211_rx_status *rx_status) 1670 { 1671 switch (mgmt->u.action.category) { 1672 case WLAN_CATEGORY_SELF_PROTECTED: 1673 switch (mgmt->u.action.u.self_prot.action_code) { 1674 case WLAN_SP_MESH_PEERING_OPEN: 1675 case WLAN_SP_MESH_PEERING_CLOSE: 1676 case WLAN_SP_MESH_PEERING_CONFIRM: 1677 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1678 break; 1679 } 1680 break; 1681 case WLAN_CATEGORY_MESH_ACTION: 1682 if (mesh_action_is_path_sel(mgmt)) 1683 mesh_rx_path_sel_frame(sdata, mgmt, len); 1684 break; 1685 case WLAN_CATEGORY_SPECTRUM_MGMT: 1686 mesh_rx_csa_frame(sdata, mgmt, len); 1687 break; 1688 } 1689 } 1690 1691 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1692 struct sk_buff *skb) 1693 { 1694 struct ieee80211_rx_status *rx_status; 1695 struct ieee80211_mgmt *mgmt; 1696 u16 stype; 1697 1698 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1699 1700 /* mesh already went down */ 1701 if (!sdata->u.mesh.mesh_id_len) 1702 return; 1703 1704 rx_status = IEEE80211_SKB_RXCB(skb); 1705 mgmt = (struct ieee80211_mgmt *) skb->data; 1706 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1707 1708 switch (stype) { 1709 case IEEE80211_STYPE_PROBE_RESP: 1710 case IEEE80211_STYPE_BEACON: 1711 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, 1712 rx_status); 1713 break; 1714 case IEEE80211_STYPE_PROBE_REQ: 1715 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1716 break; 1717 case IEEE80211_STYPE_ACTION: 1718 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1719 break; 1720 } 1721 } 1722 1723 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1724 { 1725 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1726 u32 bit; 1727 u64 changed = 0; 1728 1729 for_each_set_bit(bit, ifmsh->mbss_changed, 1730 sizeof(changed) * BITS_PER_BYTE) { 1731 clear_bit(bit, ifmsh->mbss_changed); 1732 changed |= BIT(bit); 1733 } 1734 1735 if (sdata->vif.bss_conf.enable_beacon && 1736 (changed & (BSS_CHANGED_BEACON | 1737 BSS_CHANGED_HT | 1738 BSS_CHANGED_BASIC_RATES | 1739 BSS_CHANGED_BEACON_INT))) 1740 if (ieee80211_mesh_rebuild_beacon(sdata)) 1741 return; 1742 1743 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1744 } 1745 1746 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1747 { 1748 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1749 1750 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1751 1752 /* mesh already went down */ 1753 if (!sdata->u.mesh.mesh_id_len) 1754 return; 1755 1756 if (ifmsh->preq_queue_len && 1757 time_after(jiffies, 1758 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1759 mesh_path_start_discovery(sdata); 1760 1761 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1762 ieee80211_mesh_housekeeping(sdata); 1763 1764 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1765 ieee80211_mesh_rootpath(sdata); 1766 1767 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1768 mesh_sync_adjust_tsf(sdata); 1769 1770 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1771 mesh_bss_info_changed(sdata); 1772 } 1773 1774 1775 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1776 { 1777 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1778 static u8 zero_addr[ETH_ALEN] = {}; 1779 1780 timer_setup(&ifmsh->housekeeping_timer, 1781 ieee80211_mesh_housekeeping_timer, 0); 1782 1783 ifmsh->accepting_plinks = true; 1784 atomic_set(&ifmsh->mpaths, 0); 1785 mesh_rmc_init(sdata); 1786 ifmsh->last_preq = jiffies; 1787 ifmsh->next_perr = jiffies; 1788 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1789 /* Allocate all mesh structures when creating the first mesh interface. */ 1790 if (!mesh_allocated) 1791 ieee80211s_init(); 1792 1793 mesh_pathtbl_init(sdata); 1794 1795 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1796 timer_setup(&ifmsh->mesh_path_root_timer, 1797 ieee80211_mesh_path_root_timer, 0); 1798 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1799 skb_queue_head_init(&ifmsh->ps.bc_buf); 1800 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1801 spin_lock_init(&ifmsh->sync_offset_lock); 1802 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1803 1804 sdata->vif.bss_conf.bssid = zero_addr; 1805 } 1806 1807 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1808 { 1809 mesh_rmc_free(sdata); 1810 mesh_pathtbl_unregister(sdata); 1811 } 1812