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 <asm/unaligned.h> 11#include "ieee80211_i.h" 12#include "mesh.h" 13#include "wme.h" 14#include "driver-ops.h" 15 16static int mesh_allocated; 17static struct kmem_cache *rm_cache; 18 19bool 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 25void 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 32void ieee80211s_stop(void) 33{ 34 if (!mesh_allocated) 35 return; 36 kmem_cache_destroy(rm_cache); 37} 38 39static 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 */ 62bool 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.chanreq.oper.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->local, ie->he_operation, 111 ie->eht_operation, 112 &sta_chan_def); 113 114 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chanreq.oper, 115 &sta_chan_def)) 116 return false; 117 118 return true; 119} 120 121/** 122 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 123 * 124 * @ie: information elements of a management frame from the mesh peer 125 * 126 * Returns: %true if the mesh peer is willing to establish peer links 127 */ 128bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 129{ 130 return (ie->mesh_config->meshconf_cap & 131 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 132} 133 134/** 135 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 136 * 137 * @sdata: mesh interface in which mesh beacons are going to be updated 138 * 139 * Returns: beacon changed flag if the beacon content changed. 140 */ 141u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 142{ 143 bool free_plinks; 144 u64 changed = 0; 145 146 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 147 * the mesh interface might be able to establish plinks with peers that 148 * are already on the table but are not on PLINK_ESTAB state. However, 149 * in general the mesh interface is not accepting peer link requests 150 * from new peers, and that must be reflected in the beacon 151 */ 152 free_plinks = mesh_plink_availables(sdata); 153 154 if (free_plinks != sdata->u.mesh.accepting_plinks) { 155 sdata->u.mesh.accepting_plinks = free_plinks; 156 changed = BSS_CHANGED_BEACON; 157 } 158 159 return changed; 160} 161 162/* 163 * mesh_sta_cleanup - clean up any mesh sta state 164 * 165 * @sta: mesh sta to clean up. 166 */ 167void mesh_sta_cleanup(struct sta_info *sta) 168{ 169 struct ieee80211_sub_if_data *sdata = sta->sdata; 170 u64 changed = mesh_plink_deactivate(sta); 171 172 if (changed) 173 ieee80211_mbss_info_change_notify(sdata, changed); 174} 175 176int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 177{ 178 int i; 179 180 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); 181 if (!sdata->u.mesh.rmc) 182 return -ENOMEM; 183 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 184 for (i = 0; i < RMC_BUCKETS; i++) 185 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 186 return 0; 187} 188 189void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 190{ 191 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 192 struct rmc_entry *p; 193 struct hlist_node *n; 194 int i; 195 196 if (!sdata->u.mesh.rmc) 197 return; 198 199 for (i = 0; i < RMC_BUCKETS; i++) { 200 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 201 hlist_del(&p->list); 202 kmem_cache_free(rm_cache, p); 203 } 204 } 205 206 kfree(rmc); 207 sdata->u.mesh.rmc = NULL; 208} 209 210/** 211 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 212 * 213 * @sdata: interface 214 * @sa: source address 215 * @mesh_hdr: mesh_header 216 * 217 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 218 * 219 * Checks using the source address and the mesh sequence number if we have 220 * received this frame lately. If the frame is not in the cache, it is added to 221 * it. 222 */ 223int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 224 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 225{ 226 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 227 u32 seqnum = 0; 228 int entries = 0; 229 u8 idx; 230 struct rmc_entry *p; 231 struct hlist_node *n; 232 233 if (!rmc) 234 return -1; 235 236 /* Don't care about endianness since only match matters */ 237 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 238 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 239 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 240 ++entries; 241 if (time_after(jiffies, p->exp_time) || 242 entries == RMC_QUEUE_MAX_LEN) { 243 hlist_del(&p->list); 244 kmem_cache_free(rm_cache, p); 245 --entries; 246 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 247 return -1; 248 } 249 250 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 251 if (!p) 252 return 0; 253 254 p->seqnum = seqnum; 255 p->exp_time = jiffies + RMC_TIMEOUT; 256 memcpy(p->sa, sa, ETH_ALEN); 257 hlist_add_head(&p->list, &rmc->bucket[idx]); 258 return 0; 259} 260 261int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 262 struct sk_buff *skb) 263{ 264 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 265 u8 *pos, neighbors; 266 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 267 bool is_connected_to_gate = ifmsh->num_gates > 0 || 268 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 269 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 270 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 271 272 if (skb_tailroom(skb) < 2 + meshconf_len) 273 return -ENOMEM; 274 275 pos = skb_put(skb, 2 + meshconf_len); 276 *pos++ = WLAN_EID_MESH_CONFIG; 277 *pos++ = meshconf_len; 278 279 /* save a pointer for quick updates in pre-tbtt */ 280 ifmsh->meshconf_offset = pos - skb->data; 281 282 /* Active path selection protocol ID */ 283 *pos++ = ifmsh->mesh_pp_id; 284 /* Active path selection metric ID */ 285 *pos++ = ifmsh->mesh_pm_id; 286 /* Congestion control mode identifier */ 287 *pos++ = ifmsh->mesh_cc_id; 288 /* Synchronization protocol identifier */ 289 *pos++ = ifmsh->mesh_sp_id; 290 /* Authentication Protocol identifier */ 291 *pos++ = ifmsh->mesh_auth_id; 292 /* Mesh Formation Info - number of neighbors */ 293 neighbors = atomic_read(&ifmsh->estab_plinks); 294 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 295 *pos++ = (is_connected_to_as << 7) | 296 (neighbors << 1) | 297 is_connected_to_gate; 298 /* Mesh capability */ 299 *pos = 0x00; 300 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 301 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 302 *pos |= ifmsh->accepting_plinks ? 303 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 304 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 305 *pos |= ifmsh->ps_peers_deep_sleep ? 306 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 307 return 0; 308} 309 310int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 311{ 312 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 313 u8 *pos; 314 315 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 316 return -ENOMEM; 317 318 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 319 *pos++ = WLAN_EID_MESH_ID; 320 *pos++ = ifmsh->mesh_id_len; 321 if (ifmsh->mesh_id_len) 322 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 323 324 return 0; 325} 326 327static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 328 struct sk_buff *skb) 329{ 330 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 331 u8 *pos; 332 333 /* see IEEE802.11-2012 13.14.6 */ 334 if (ifmsh->ps_peers_light_sleep == 0 && 335 ifmsh->ps_peers_deep_sleep == 0 && 336 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 337 return 0; 338 339 if (skb_tailroom(skb) < 4) 340 return -ENOMEM; 341 342 pos = skb_put(skb, 2 + 2); 343 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 344 *pos++ = 2; 345 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 346 347 return 0; 348} 349 350int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 351 struct sk_buff *skb) 352{ 353 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 354 u8 offset, len; 355 const u8 *data; 356 357 if (!ifmsh->ie || !ifmsh->ie_len) 358 return 0; 359 360 /* fast-forward to vendor IEs */ 361 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 362 363 if (offset < ifmsh->ie_len) { 364 len = ifmsh->ie_len - offset; 365 data = ifmsh->ie + offset; 366 if (skb_tailroom(skb) < len) 367 return -ENOMEM; 368 skb_put_data(skb, data, len); 369 } 370 371 return 0; 372} 373 374int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 375{ 376 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 377 u8 len = 0; 378 const u8 *data; 379 380 if (!ifmsh->ie || !ifmsh->ie_len) 381 return 0; 382 383 /* find RSN IE */ 384 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 385 if (!data) 386 return 0; 387 388 len = data[1] + 2; 389 390 if (skb_tailroom(skb) < len) 391 return -ENOMEM; 392 skb_put_data(skb, data, len); 393 394 return 0; 395} 396 397static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 398 struct sk_buff *skb) 399{ 400 struct ieee80211_chanctx_conf *chanctx_conf; 401 struct ieee80211_channel *chan; 402 u8 *pos; 403 404 if (skb_tailroom(skb) < 3) 405 return -ENOMEM; 406 407 rcu_read_lock(); 408 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 409 if (WARN_ON(!chanctx_conf)) { 410 rcu_read_unlock(); 411 return -EINVAL; 412 } 413 chan = chanctx_conf->def.chan; 414 rcu_read_unlock(); 415 416 pos = skb_put(skb, 2 + 1); 417 *pos++ = WLAN_EID_DS_PARAMS; 418 *pos++ = 1; 419 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 420 421 return 0; 422} 423 424int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 425 struct sk_buff *skb) 426{ 427 struct ieee80211_supported_band *sband; 428 u8 *pos; 429 430 sband = ieee80211_get_sband(sdata); 431 if (!sband) 432 return -EINVAL; 433 434 /* HT not allowed in 6 GHz */ 435 if (sband->band == NL80211_BAND_6GHZ) 436 return 0; 437 438 if (!sband->ht_cap.ht_supported || 439 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 440 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 441 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 442 return 0; 443 444 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 445 return -ENOMEM; 446 447 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 448 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 449 450 return 0; 451} 452 453int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 454 struct sk_buff *skb) 455{ 456 struct ieee80211_local *local = sdata->local; 457 struct ieee80211_chanctx_conf *chanctx_conf; 458 struct ieee80211_channel *channel; 459 struct ieee80211_supported_band *sband; 460 struct ieee80211_sta_ht_cap *ht_cap; 461 u8 *pos; 462 463 rcu_read_lock(); 464 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 465 if (WARN_ON(!chanctx_conf)) { 466 rcu_read_unlock(); 467 return -EINVAL; 468 } 469 channel = chanctx_conf->def.chan; 470 rcu_read_unlock(); 471 472 sband = local->hw.wiphy->bands[channel->band]; 473 ht_cap = &sband->ht_cap; 474 475 /* HT not allowed in 6 GHz */ 476 if (sband->band == NL80211_BAND_6GHZ) 477 return 0; 478 479 if (!ht_cap->ht_supported || 480 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 481 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 482 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 483 return 0; 484 485 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 486 return -ENOMEM; 487 488 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 489 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chanreq.oper, 490 sdata->vif.bss_conf.ht_operation_mode, 491 false); 492 493 return 0; 494} 495 496int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 497 struct sk_buff *skb) 498{ 499 struct ieee80211_supported_band *sband; 500 u8 *pos; 501 502 sband = ieee80211_get_sband(sdata); 503 if (!sband) 504 return -EINVAL; 505 506 /* VHT not allowed in 6 GHz */ 507 if (sband->band == NL80211_BAND_6GHZ) 508 return 0; 509 510 if (!sband->vht_cap.vht_supported || 511 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 512 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 513 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 514 return 0; 515 516 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 517 return -ENOMEM; 518 519 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 520 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 521 522 return 0; 523} 524 525int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 526 struct sk_buff *skb) 527{ 528 struct ieee80211_local *local = sdata->local; 529 struct ieee80211_chanctx_conf *chanctx_conf; 530 struct ieee80211_channel *channel; 531 struct ieee80211_supported_band *sband; 532 struct ieee80211_sta_vht_cap *vht_cap; 533 u8 *pos; 534 535 rcu_read_lock(); 536 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 537 if (WARN_ON(!chanctx_conf)) { 538 rcu_read_unlock(); 539 return -EINVAL; 540 } 541 channel = chanctx_conf->def.chan; 542 rcu_read_unlock(); 543 544 sband = local->hw.wiphy->bands[channel->band]; 545 vht_cap = &sband->vht_cap; 546 547 /* VHT not allowed in 6 GHz */ 548 if (sband->band == NL80211_BAND_6GHZ) 549 return 0; 550 551 if (!vht_cap->vht_supported || 552 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 553 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 554 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 555 return 0; 556 557 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 558 return -ENOMEM; 559 560 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 561 ieee80211_ie_build_vht_oper(pos, vht_cap, 562 &sdata->vif.bss_conf.chanreq.oper); 563 564 return 0; 565} 566 567int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 568 struct sk_buff *skb, u8 ie_len) 569{ 570 struct ieee80211_supported_band *sband; 571 572 sband = ieee80211_get_sband(sdata); 573 if (!sband) 574 return -EINVAL; 575 576 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 577 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 578 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 579 return 0; 580 581 return ieee80211_put_he_cap(skb, sdata, sband, NULL); 582} 583 584int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 585 struct sk_buff *skb) 586{ 587 const struct ieee80211_sta_he_cap *he_cap; 588 struct ieee80211_supported_band *sband; 589 u32 len; 590 u8 *pos; 591 592 sband = ieee80211_get_sband(sdata); 593 if (!sband) 594 return -EINVAL; 595 596 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 597 if (!he_cap || 598 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 599 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 600 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 601 return 0; 602 603 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 604 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ) 605 len += sizeof(struct ieee80211_he_6ghz_oper); 606 607 if (skb_tailroom(skb) < len) 608 return -ENOMEM; 609 610 pos = skb_put(skb, len); 611 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper); 612 613 return 0; 614} 615 616int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 617 struct sk_buff *skb) 618{ 619 struct ieee80211_supported_band *sband; 620 const struct ieee80211_sband_iftype_data *iftd; 621 622 sband = ieee80211_get_sband(sdata); 623 if (!sband) 624 return -EINVAL; 625 626 iftd = ieee80211_get_sband_iftype_data(sband, 627 NL80211_IFTYPE_MESH_POINT); 628 /* The device doesn't support HE in mesh mode or at all */ 629 if (!iftd) 630 return 0; 631 632 ieee80211_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode); 633 return 0; 634} 635 636int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 637 struct sk_buff *skb, u8 ie_len) 638{ 639 struct ieee80211_supported_band *sband; 640 641 sband = ieee80211_get_sband(sdata); 642 if (!sband) 643 return -EINVAL; 644 645 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 646 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 647 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 648 return 0; 649 650 return ieee80211_put_eht_cap(skb, sdata, sband, NULL); 651} 652 653int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 654{ 655 const struct ieee80211_sta_eht_cap *eht_cap; 656 struct ieee80211_supported_band *sband; 657 u32 len; 658 u8 *pos; 659 660 sband = ieee80211_get_sband(sdata); 661 if (!sband) 662 return -EINVAL; 663 664 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 665 if (!eht_cap || 666 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 667 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 668 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 669 return 0; 670 671 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 672 offsetof(struct ieee80211_eht_operation_info, optional); 673 674 if (skb_tailroom(skb) < len) 675 return -ENOMEM; 676 677 pos = skb_put(skb, len); 678 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap); 679 680 return 0; 681} 682 683static void ieee80211_mesh_path_timer(struct timer_list *t) 684{ 685 struct ieee80211_sub_if_data *sdata = 686 from_timer(sdata, t, u.mesh.mesh_path_timer); 687 688 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 689} 690 691static void ieee80211_mesh_path_root_timer(struct timer_list *t) 692{ 693 struct ieee80211_sub_if_data *sdata = 694 from_timer(sdata, t, u.mesh.mesh_path_root_timer); 695 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 696 697 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 698 699 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 700} 701 702void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 703{ 704 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 705 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 706 else { 707 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 708 /* stop running timer */ 709 del_timer_sync(&ifmsh->mesh_path_root_timer); 710 } 711} 712 713static void 714ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 715 u8 *ie, u8 ie_len) 716{ 717 struct ieee80211_supported_band *sband; 718 const struct element *cap; 719 const struct ieee80211_he_operation *he_oper = NULL; 720 721 sband = ieee80211_get_sband(sdata); 722 if (!sband) 723 return; 724 725 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 726 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 727 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 728 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 729 return; 730 731 sdata->vif.bss_conf.he_support = true; 732 733 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 734 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 735 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 736 he_oper = (void *)(cap->data + 1); 737 738 if (he_oper) 739 sdata->vif.bss_conf.he_oper.params = 740 __le32_to_cpu(he_oper->he_oper_params); 741 742 sdata->vif.bss_conf.eht_support = 743 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 744} 745 746bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 747 struct sk_buff *skb, u32 ctrl_flags) 748{ 749 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 750 struct ieee80211_mesh_fast_tx *entry; 751 struct ieee80211s_hdr *meshhdr; 752 u8 sa[ETH_ALEN] __aligned(2); 753 struct tid_ampdu_tx *tid_tx; 754 struct sta_info *sta; 755 bool copy_sa = false; 756 u16 ethertype; 757 u8 tid; 758 759 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 760 return false; 761 762 if (ifmsh->mshcfg.dot11MeshNolearn) 763 return false; 764 765 /* Add support for these cases later */ 766 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 767 return false; 768 769 if (is_multicast_ether_addr(skb->data)) 770 return false; 771 772 ethertype = (skb->data[12] << 8) | skb->data[13]; 773 if (ethertype < ETH_P_802_3_MIN) 774 return false; 775 776 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) 777 return false; 778 779 if (skb->ip_summed == CHECKSUM_PARTIAL) { 780 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 781 if (skb_checksum_help(skb)) 782 return false; 783 } 784 785 entry = mesh_fast_tx_get(sdata, skb->data); 786 if (!entry) 787 return false; 788 789 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 790 return false; 791 792 sta = rcu_dereference(entry->mpath->next_hop); 793 if (!sta) 794 return false; 795 796 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 797 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 798 if (tid_tx) { 799 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 800 return false; 801 if (tid_tx->timeout) 802 tid_tx->last_tx = jiffies; 803 } 804 805 skb = skb_share_check(skb, GFP_ATOMIC); 806 if (!skb) 807 return true; 808 809 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 810 811 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 812 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 813 /* preserve SA from eth header for 6-addr frames */ 814 ether_addr_copy(sa, skb->data + ETH_ALEN); 815 copy_sa = true; 816 } 817 818 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 819 entry->hdrlen); 820 821 meshhdr = (struct ieee80211s_hdr *)skb->data; 822 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 823 &meshhdr->seqnum); 824 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 825 if (copy_sa) 826 ether_addr_copy(meshhdr->eaddr2, sa); 827 828 skb_push(skb, 2 * ETH_ALEN); 829 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 830 entry->mpath->dst, sdata->vif.addr); 831 832 return true; 833} 834 835/** 836 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 837 * @hdr: 802.11 frame header 838 * @fc: frame control field 839 * @meshda: destination address in the mesh 840 * @meshsa: source address in the mesh. Same as TA, as frame is 841 * locally originated. 842 * 843 * Returns: the length of the 802.11 frame header (excludes mesh control header) 844 */ 845int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 846 const u8 *meshda, const u8 *meshsa) 847{ 848 if (is_multicast_ether_addr(meshda)) { 849 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 850 /* DA TA SA */ 851 memcpy(hdr->addr1, meshda, ETH_ALEN); 852 memcpy(hdr->addr2, meshsa, ETH_ALEN); 853 memcpy(hdr->addr3, meshsa, ETH_ALEN); 854 return 24; 855 } else { 856 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 857 /* RA TA DA SA */ 858 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 859 memcpy(hdr->addr2, meshsa, ETH_ALEN); 860 memcpy(hdr->addr3, meshda, ETH_ALEN); 861 memcpy(hdr->addr4, meshsa, ETH_ALEN); 862 return 30; 863 } 864} 865 866/** 867 * ieee80211_new_mesh_header - create a new mesh header 868 * @sdata: mesh interface to be used 869 * @meshhdr: uninitialized mesh header 870 * @addr4or5: 1st address in the ae header, which may correspond to address 4 871 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 872 * be NULL. 873 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 874 * mesh frame 875 * 876 * Returns: the header length 877 */ 878unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 879 struct ieee80211s_hdr *meshhdr, 880 const char *addr4or5, const char *addr6) 881{ 882 if (WARN_ON(!addr4or5 && addr6)) 883 return 0; 884 885 memset(meshhdr, 0, sizeof(*meshhdr)); 886 887 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 888 889 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 890 &meshhdr->seqnum); 891 if (addr4or5 && !addr6) { 892 meshhdr->flags |= MESH_FLAGS_AE_A4; 893 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 894 return 2 * ETH_ALEN; 895 } else if (addr4or5 && addr6) { 896 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 897 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 898 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 899 return 3 * ETH_ALEN; 900 } 901 902 return ETH_ALEN; 903} 904 905static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 906{ 907 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 908 u64 changed; 909 910 if (ifmsh->mshcfg.plink_timeout > 0) 911 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 912 mesh_path_expire(sdata); 913 914 changed = mesh_accept_plinks_update(sdata); 915 ieee80211_mbss_info_change_notify(sdata, changed); 916 917 mesh_fast_tx_gc(sdata); 918 919 mod_timer(&ifmsh->housekeeping_timer, 920 round_jiffies(jiffies + 921 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 922} 923 924static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 925{ 926 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 927 u32 interval; 928 929 mesh_path_tx_root_frame(sdata); 930 931 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 932 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 933 else 934 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 935 936 mod_timer(&ifmsh->mesh_path_root_timer, 937 round_jiffies(TU_TO_EXP_TIME(interval))); 938} 939 940static int 941ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 942{ 943 struct beacon_data *bcn; 944 int head_len, tail_len; 945 struct sk_buff *skb; 946 struct ieee80211_mgmt *mgmt; 947 struct mesh_csa_settings *csa; 948 const struct ieee80211_supported_band *sband; 949 u8 ie_len_he_cap, ie_len_eht_cap; 950 u8 *pos; 951 struct ieee80211_sub_if_data *sdata; 952 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 953 u32 rate_flags; 954 955 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 956 957 sband = ieee80211_get_sband(sdata); 958 rate_flags = 959 ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper); 960 961 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata); 962 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata); 963 head_len = hdr_len + 964 2 + /* NULL SSID */ 965 /* Channel Switch Announcement */ 966 2 + sizeof(struct ieee80211_channel_sw_ie) + 967 /* Mesh Channel Switch Parameters */ 968 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 969 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 970 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 971 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 972 2 + 8 + /* supported rates */ 973 2 + 3; /* DS params */ 974 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 975 2 + sizeof(struct ieee80211_ht_cap) + 976 2 + sizeof(struct ieee80211_ht_operation) + 977 2 + ifmsh->mesh_id_len + 978 2 + sizeof(struct ieee80211_meshconf_ie) + 979 2 + sizeof(__le16) + /* awake window */ 980 2 + sizeof(struct ieee80211_vht_cap) + 981 2 + sizeof(struct ieee80211_vht_operation) + 982 ie_len_he_cap + 983 2 + 1 + sizeof(struct ieee80211_he_operation) + 984 sizeof(struct ieee80211_he_6ghz_oper) + 985 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 986 ie_len_eht_cap + 987 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 988 offsetof(struct ieee80211_eht_operation_info, optional) + 989 ifmsh->ie_len; 990 991 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 992 /* need an skb for IE builders to operate on */ 993 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 994 995 if (!bcn || !skb) 996 goto out_free; 997 998 /* 999 * pointers go into the block we allocated, 1000 * memory is | beacon_data | head | tail | 1001 */ 1002 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1003 1004 /* fill in the head */ 1005 mgmt = skb_put_zero(skb, hdr_len); 1006 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1007 IEEE80211_STYPE_BEACON); 1008 eth_broadcast_addr(mgmt->da); 1009 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1010 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1011 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1012 mgmt->u.beacon.beacon_int = 1013 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1014 mgmt->u.beacon.capab_info |= cpu_to_le16( 1015 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1016 1017 pos = skb_put(skb, 2); 1018 *pos++ = WLAN_EID_SSID; 1019 *pos++ = 0x0; 1020 1021 rcu_read_lock(); 1022 csa = rcu_dereference(ifmsh->csa); 1023 if (csa) { 1024 enum nl80211_channel_type ct; 1025 struct cfg80211_chan_def *chandef; 1026 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1027 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1028 1029 pos = skb_put_zero(skb, ie_len); 1030 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1031 *pos++ = 3; 1032 *pos++ = 0x0; 1033 *pos++ = ieee80211_frequency_to_channel( 1034 csa->settings.chandef.chan->center_freq); 1035 bcn->cntdwn_current_counter = csa->settings.count; 1036 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1037 *pos++ = csa->settings.count; 1038 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1039 *pos++ = 6; 1040 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1041 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1042 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1043 } else { 1044 *pos++ = ifmsh->chsw_ttl; 1045 } 1046 *pos++ |= csa->settings.block_tx ? 1047 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1048 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1049 pos += 2; 1050 put_unaligned_le16(ifmsh->pre_value, pos); 1051 pos += 2; 1052 1053 switch (csa->settings.chandef.width) { 1054 case NL80211_CHAN_WIDTH_40: 1055 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1056 pos = skb_put_zero(skb, ie_len); 1057 1058 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1059 *pos++ = 1; /* len */ 1060 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1061 if (ct == NL80211_CHAN_HT40PLUS) 1062 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1063 else 1064 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1065 break; 1066 case NL80211_CHAN_WIDTH_80: 1067 case NL80211_CHAN_WIDTH_80P80: 1068 case NL80211_CHAN_WIDTH_160: 1069 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1070 ie_len = 2 + 2 + 1071 sizeof(struct ieee80211_wide_bw_chansw_ie); 1072 pos = skb_put_zero(skb, ie_len); 1073 1074 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1075 *pos++ = 5; /* len */ 1076 /* put sub IE */ 1077 chandef = &csa->settings.chandef; 1078 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1079 break; 1080 default: 1081 break; 1082 } 1083 } 1084 rcu_read_unlock(); 1085 1086 if (ieee80211_put_srates_elem(skb, sband, 1087 sdata->vif.bss_conf.basic_rates, 1088 rate_flags, 0, WLAN_EID_SUPP_RATES) || 1089 mesh_add_ds_params_ie(sdata, skb)) 1090 goto out_free; 1091 1092 bcn->head_len = skb->len; 1093 memcpy(bcn->head, skb->data, bcn->head_len); 1094 1095 /* now the tail */ 1096 skb_trim(skb, 0); 1097 bcn->tail = bcn->head + bcn->head_len; 1098 1099 if (ieee80211_put_srates_elem(skb, sband, 1100 sdata->vif.bss_conf.basic_rates, 1101 rate_flags, 0, WLAN_EID_EXT_SUPP_RATES) || 1102 mesh_add_rsn_ie(sdata, skb) || 1103 mesh_add_ht_cap_ie(sdata, skb) || 1104 mesh_add_ht_oper_ie(sdata, skb) || 1105 mesh_add_meshid_ie(sdata, skb) || 1106 mesh_add_meshconf_ie(sdata, skb) || 1107 mesh_add_awake_window_ie(sdata, skb) || 1108 mesh_add_vht_cap_ie(sdata, skb) || 1109 mesh_add_vht_oper_ie(sdata, skb) || 1110 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1111 mesh_add_he_oper_ie(sdata, skb) || 1112 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1113 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1114 mesh_add_eht_oper_ie(sdata, skb) || 1115 mesh_add_vendor_ies(sdata, skb)) 1116 goto out_free; 1117 1118 bcn->tail_len = skb->len; 1119 memcpy(bcn->tail, skb->data, bcn->tail_len); 1120 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1121 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1122 (bcn->tail + ifmsh->meshconf_offset); 1123 1124 dev_kfree_skb(skb); 1125 rcu_assign_pointer(ifmsh->beacon, bcn); 1126 return 0; 1127out_free: 1128 kfree(bcn); 1129 dev_kfree_skb(skb); 1130 return -ENOMEM; 1131} 1132 1133static int 1134ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1135{ 1136 struct beacon_data *old_bcn; 1137 int ret; 1138 1139 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1140 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1141 if (ret) 1142 /* just reuse old beacon */ 1143 return ret; 1144 1145 if (old_bcn) 1146 kfree_rcu(old_bcn, rcu_head); 1147 return 0; 1148} 1149 1150void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1151 u64 changed) 1152{ 1153 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1154 unsigned long bits = changed; 1155 u32 bit; 1156 1157 if (!bits) 1158 return; 1159 1160 /* if we race with running work, worst case this work becomes a noop */ 1161 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) 1162 set_bit(bit, ifmsh->mbss_changed); 1163 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1164 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1165} 1166 1167int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1168{ 1169 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1170 struct ieee80211_local *local = sdata->local; 1171 u64 changed = BSS_CHANGED_BEACON | 1172 BSS_CHANGED_BEACON_ENABLED | 1173 BSS_CHANGED_HT | 1174 BSS_CHANGED_BASIC_RATES | 1175 BSS_CHANGED_BEACON_INT | 1176 BSS_CHANGED_MCAST_RATE; 1177 1178 local->fif_other_bss++; 1179 /* mesh ifaces must set allmulti to forward mcast traffic */ 1180 atomic_inc(&local->iff_allmultis); 1181 ieee80211_configure_filter(local); 1182 1183 ifmsh->mesh_cc_id = 0; /* Disabled */ 1184 /* register sync ops from extensible synchronization framework */ 1185 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1186 ifmsh->sync_offset_clockdrift_max = 0; 1187 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1188 ieee80211_mesh_root_setup(ifmsh); 1189 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1190 sdata->vif.bss_conf.ht_operation_mode = 1191 ifmsh->mshcfg.ht_opmode; 1192 sdata->vif.bss_conf.enable_beacon = true; 1193 1194 changed |= ieee80211_mps_local_status_update(sdata); 1195 1196 if (ieee80211_mesh_build_beacon(ifmsh)) { 1197 ieee80211_stop_mesh(sdata); 1198 return -ENOMEM; 1199 } 1200 1201 ieee80211_recalc_dtim(local, sdata); 1202 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1203 1204 netif_carrier_on(sdata->dev); 1205 return 0; 1206} 1207 1208void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1209{ 1210 struct ieee80211_local *local = sdata->local; 1211 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1212 struct beacon_data *bcn; 1213 1214 netif_carrier_off(sdata->dev); 1215 1216 /* flush STAs and mpaths on this iface */ 1217 sta_info_flush(sdata, -1); 1218 ieee80211_free_keys(sdata, true); 1219 mesh_path_flush_by_iface(sdata); 1220 1221 /* stop the beacon */ 1222 ifmsh->mesh_id_len = 0; 1223 sdata->vif.bss_conf.enable_beacon = false; 1224 sdata->beacon_rate_set = false; 1225 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1226 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1227 BSS_CHANGED_BEACON_ENABLED); 1228 1229 /* remove beacon */ 1230 bcn = sdata_dereference(ifmsh->beacon, sdata); 1231 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1232 kfree_rcu(bcn, rcu_head); 1233 1234 /* free all potentially still buffered group-addressed frames */ 1235 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1236 skb_queue_purge(&ifmsh->ps.bc_buf); 1237 1238 del_timer_sync(&sdata->u.mesh.housekeeping_timer); 1239 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); 1240 del_timer_sync(&sdata->u.mesh.mesh_path_timer); 1241 1242 /* clear any mesh work (for next join) we may have accrued */ 1243 ifmsh->wrkq_flags = 0; 1244 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1245 1246 local->fif_other_bss--; 1247 atomic_dec(&local->iff_allmultis); 1248 ieee80211_configure_filter(local); 1249} 1250 1251static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1252{ 1253 int err; 1254 1255 /* if the current channel is a DFS channel, mark the channel as 1256 * unavailable. 1257 */ 1258 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1259 &sdata->vif.bss_conf.chanreq.oper, 1260 NL80211_IFTYPE_MESH_POINT); 1261 if (err > 0) 1262 cfg80211_radar_event(sdata->local->hw.wiphy, 1263 &sdata->vif.bss_conf.chanreq.oper, 1264 GFP_ATOMIC); 1265} 1266 1267static bool 1268ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1269 struct ieee802_11_elems *elems, bool beacon) 1270{ 1271 struct cfg80211_csa_settings params; 1272 struct ieee80211_csa_ie csa_ie; 1273 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1274 struct ieee80211_supported_band *sband; 1275 int err; 1276 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited; 1277 u32 vht_cap_info = 0; 1278 1279 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1280 1281 sband = ieee80211_get_sband(sdata); 1282 if (!sband) 1283 return false; 1284 1285 switch (sdata->vif.bss_conf.chanreq.oper.width) { 1286 case NL80211_CHAN_WIDTH_20_NOHT: 1287 conn.mode = IEEE80211_CONN_MODE_LEGACY; 1288 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1289 break; 1290 case NL80211_CHAN_WIDTH_20: 1291 conn.mode = IEEE80211_CONN_MODE_HT; 1292 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1293 break; 1294 case NL80211_CHAN_WIDTH_40: 1295 conn.mode = IEEE80211_CONN_MODE_HT; 1296 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40; 1297 break; 1298 default: 1299 break; 1300 } 1301 1302 if (elems->vht_cap_elem) 1303 vht_cap_info = 1304 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1305 1306 memset(¶ms, 0, sizeof(params)); 1307 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1308 vht_cap_info, &conn, 1309 sdata->vif.addr, 1310 &csa_ie); 1311 if (err < 0) 1312 return false; 1313 if (err) 1314 return false; 1315 1316 /* Mark the channel unavailable if the reason for the switch is 1317 * regulatory. 1318 */ 1319 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1320 ieee80211_mesh_csa_mark_radar(sdata); 1321 1322 params.chandef = csa_ie.chanreq.oper; 1323 params.count = csa_ie.count; 1324 1325 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1326 IEEE80211_CHAN_DISABLED) || 1327 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1328 NL80211_IFTYPE_MESH_POINT)) { 1329 sdata_info(sdata, 1330 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1331 sdata->vif.addr, 1332 params.chandef.chan->center_freq, 1333 params.chandef.width, 1334 params.chandef.center_freq1, 1335 params.chandef.center_freq2); 1336 return false; 1337 } 1338 1339 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1340 ¶ms.chandef, 1341 NL80211_IFTYPE_MESH_POINT); 1342 if (err < 0) 1343 return false; 1344 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1345 sdata_info(sdata, 1346 "mesh STA %pM switches to channel requiring DFS (%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 params.radar_required = err; 1356 1357 if (cfg80211_chandef_identical(¶ms.chandef, 1358 &sdata->vif.bss_conf.chanreq.oper)) { 1359 mcsa_dbg(sdata, 1360 "received csa with an identical chandef, ignoring\n"); 1361 return true; 1362 } 1363 1364 mcsa_dbg(sdata, 1365 "received channel switch announcement to go to channel %d MHz\n", 1366 params.chandef.chan->center_freq); 1367 1368 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1369 if (beacon) { 1370 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1371 if (ifmsh->pre_value >= csa_ie.pre_value) 1372 return false; 1373 ifmsh->pre_value = csa_ie.pre_value; 1374 } 1375 1376 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1377 return false; 1378 1379 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1380 1381 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1382 ¶ms) < 0) 1383 return false; 1384 1385 return true; 1386} 1387 1388static void 1389ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1390 struct ieee80211_mgmt *mgmt, size_t len) 1391{ 1392 struct ieee80211_local *local = sdata->local; 1393 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1394 struct sk_buff *presp; 1395 struct beacon_data *bcn; 1396 struct ieee80211_mgmt *hdr; 1397 struct ieee802_11_elems *elems; 1398 size_t baselen; 1399 u8 *pos; 1400 1401 pos = mgmt->u.probe_req.variable; 1402 baselen = (u8 *) pos - (u8 *) mgmt; 1403 if (baselen > len) 1404 return; 1405 1406 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL); 1407 if (!elems) 1408 return; 1409 1410 if (!elems->mesh_id) 1411 goto free; 1412 1413 /* 802.11-2012 10.1.4.3.2 */ 1414 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1415 !is_broadcast_ether_addr(mgmt->da)) || 1416 elems->ssid_len != 0) 1417 goto free; 1418 1419 if (elems->mesh_id_len != 0 && 1420 (elems->mesh_id_len != ifmsh->mesh_id_len || 1421 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1422 goto free; 1423 1424 rcu_read_lock(); 1425 bcn = rcu_dereference(ifmsh->beacon); 1426 1427 if (!bcn) 1428 goto out; 1429 1430 presp = dev_alloc_skb(local->tx_headroom + 1431 bcn->head_len + bcn->tail_len); 1432 if (!presp) 1433 goto out; 1434 1435 skb_reserve(presp, local->tx_headroom); 1436 skb_put_data(presp, bcn->head, bcn->head_len); 1437 skb_put_data(presp, bcn->tail, bcn->tail_len); 1438 hdr = (struct ieee80211_mgmt *) presp->data; 1439 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1440 IEEE80211_STYPE_PROBE_RESP); 1441 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1442 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1443 ieee80211_tx_skb(sdata, presp); 1444out: 1445 rcu_read_unlock(); 1446free: 1447 kfree(elems); 1448} 1449 1450static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1451 u16 stype, 1452 struct ieee80211_mgmt *mgmt, 1453 size_t len, 1454 struct ieee80211_rx_status *rx_status) 1455{ 1456 struct ieee80211_local *local = sdata->local; 1457 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1458 struct ieee802_11_elems *elems; 1459 struct ieee80211_channel *channel; 1460 size_t baselen; 1461 int freq; 1462 enum nl80211_band band = rx_status->band; 1463 1464 /* ignore ProbeResp to foreign address */ 1465 if (stype == IEEE80211_STYPE_PROBE_RESP && 1466 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1467 return; 1468 1469 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1470 if (baselen > len) 1471 return; 1472 1473 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1474 len - baselen, 1475 false, NULL); 1476 if (!elems) 1477 return; 1478 1479 /* ignore non-mesh or secure / unsecure mismatch */ 1480 if ((!elems->mesh_id || !elems->mesh_config) || 1481 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1482 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1483 goto free; 1484 1485 if (elems->ds_params) 1486 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1487 else 1488 freq = rx_status->freq; 1489 1490 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1491 1492 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1493 goto free; 1494 1495 if (mesh_matches_local(sdata, elems)) { 1496 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1497 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1498 if (!sdata->u.mesh.user_mpm || 1499 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1500 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1501 mesh_neighbour_update(sdata, mgmt->sa, elems, 1502 rx_status); 1503 1504 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1505 !sdata->vif.bss_conf.csa_active) 1506 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1507 } 1508 1509 if (ifmsh->sync_ops) 1510 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, 1511 elems->mesh_config, rx_status); 1512free: 1513 kfree(elems); 1514} 1515 1516int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1517{ 1518 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1519 struct mesh_csa_settings *tmp_csa_settings; 1520 int ret = 0; 1521 1522 /* Reset the TTL value and Initiator flag */ 1523 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1524 ifmsh->chsw_ttl = 0; 1525 1526 /* Remove the CSA and MCSP elements from the beacon */ 1527 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1528 RCU_INIT_POINTER(ifmsh->csa, NULL); 1529 if (tmp_csa_settings) 1530 kfree_rcu(tmp_csa_settings, rcu_head); 1531 ret = ieee80211_mesh_rebuild_beacon(sdata); 1532 if (ret) 1533 return -EINVAL; 1534 1535 *changed |= BSS_CHANGED_BEACON; 1536 1537 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1538 sdata->vif.bss_conf.chanreq.oper.chan->center_freq); 1539 return 0; 1540} 1541 1542int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1543 struct cfg80211_csa_settings *csa_settings, 1544 u64 *changed) 1545{ 1546 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1547 struct mesh_csa_settings *tmp_csa_settings; 1548 int ret = 0; 1549 1550 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1551 1552 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), 1553 GFP_ATOMIC); 1554 if (!tmp_csa_settings) 1555 return -ENOMEM; 1556 1557 memcpy(&tmp_csa_settings->settings, csa_settings, 1558 sizeof(struct cfg80211_csa_settings)); 1559 1560 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1561 1562 ret = ieee80211_mesh_rebuild_beacon(sdata); 1563 if (ret) { 1564 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1565 RCU_INIT_POINTER(ifmsh->csa, NULL); 1566 kfree_rcu(tmp_csa_settings, rcu_head); 1567 return ret; 1568 } 1569 1570 *changed |= BSS_CHANGED_BEACON; 1571 return 0; 1572} 1573 1574static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1575 struct ieee80211_mgmt *mgmt, size_t len, 1576 struct ieee802_11_elems *elems) 1577{ 1578 struct ieee80211_mgmt *mgmt_fwd; 1579 struct sk_buff *skb; 1580 struct ieee80211_local *local = sdata->local; 1581 1582 skb = dev_alloc_skb(local->tx_headroom + len); 1583 if (!skb) 1584 return -ENOMEM; 1585 skb_reserve(skb, local->tx_headroom); 1586 mgmt_fwd = skb_put(skb, len); 1587 1588 elems->mesh_chansw_params_ie->mesh_ttl--; 1589 elems->mesh_chansw_params_ie->mesh_flags &= 1590 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1591 1592 memcpy(mgmt_fwd, mgmt, len); 1593 eth_broadcast_addr(mgmt_fwd->da); 1594 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1595 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1596 1597 ieee80211_tx_skb(sdata, skb); 1598 return 0; 1599} 1600 1601static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1602 struct ieee80211_mgmt *mgmt, size_t len) 1603{ 1604 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1605 struct ieee802_11_elems *elems; 1606 u16 pre_value; 1607 bool fwd_csa = true; 1608 size_t baselen; 1609 u8 *pos; 1610 1611 if (mgmt->u.action.u.measurement.action_code != 1612 WLAN_ACTION_SPCT_CHL_SWITCH) 1613 return; 1614 1615 pos = mgmt->u.action.u.chan_switch.variable; 1616 baselen = offsetof(struct ieee80211_mgmt, 1617 u.action.u.chan_switch.variable); 1618 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL); 1619 if (!elems) 1620 return; 1621 1622 if (!mesh_matches_local(sdata, elems)) 1623 goto free; 1624 1625 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1626 if (!--ifmsh->chsw_ttl) 1627 fwd_csa = false; 1628 1629 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1630 if (ifmsh->pre_value >= pre_value) 1631 goto free; 1632 1633 ifmsh->pre_value = pre_value; 1634 1635 if (!sdata->vif.bss_conf.csa_active && 1636 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1637 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1638 goto free; 1639 } 1640 1641 /* forward or re-broadcast the CSA frame */ 1642 if (fwd_csa) { 1643 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1644 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1645 } 1646free: 1647 kfree(elems); 1648} 1649 1650static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1651 struct ieee80211_mgmt *mgmt, 1652 size_t len, 1653 struct ieee80211_rx_status *rx_status) 1654{ 1655 switch (mgmt->u.action.category) { 1656 case WLAN_CATEGORY_SELF_PROTECTED: 1657 switch (mgmt->u.action.u.self_prot.action_code) { 1658 case WLAN_SP_MESH_PEERING_OPEN: 1659 case WLAN_SP_MESH_PEERING_CLOSE: 1660 case WLAN_SP_MESH_PEERING_CONFIRM: 1661 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1662 break; 1663 } 1664 break; 1665 case WLAN_CATEGORY_MESH_ACTION: 1666 if (mesh_action_is_path_sel(mgmt)) 1667 mesh_rx_path_sel_frame(sdata, mgmt, len); 1668 break; 1669 case WLAN_CATEGORY_SPECTRUM_MGMT: 1670 mesh_rx_csa_frame(sdata, mgmt, len); 1671 break; 1672 } 1673} 1674 1675void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1676 struct sk_buff *skb) 1677{ 1678 struct ieee80211_rx_status *rx_status; 1679 struct ieee80211_mgmt *mgmt; 1680 u16 stype; 1681 1682 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1683 1684 /* mesh already went down */ 1685 if (!sdata->u.mesh.mesh_id_len) 1686 return; 1687 1688 rx_status = IEEE80211_SKB_RXCB(skb); 1689 mgmt = (struct ieee80211_mgmt *) skb->data; 1690 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1691 1692 switch (stype) { 1693 case IEEE80211_STYPE_PROBE_RESP: 1694 case IEEE80211_STYPE_BEACON: 1695 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, 1696 rx_status); 1697 break; 1698 case IEEE80211_STYPE_PROBE_REQ: 1699 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1700 break; 1701 case IEEE80211_STYPE_ACTION: 1702 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1703 break; 1704 } 1705} 1706 1707static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1708{ 1709 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1710 u32 bit; 1711 u64 changed = 0; 1712 1713 for_each_set_bit(bit, ifmsh->mbss_changed, 1714 sizeof(changed) * BITS_PER_BYTE) { 1715 clear_bit(bit, ifmsh->mbss_changed); 1716 changed |= BIT(bit); 1717 } 1718 1719 if (sdata->vif.bss_conf.enable_beacon && 1720 (changed & (BSS_CHANGED_BEACON | 1721 BSS_CHANGED_HT | 1722 BSS_CHANGED_BASIC_RATES | 1723 BSS_CHANGED_BEACON_INT))) 1724 if (ieee80211_mesh_rebuild_beacon(sdata)) 1725 return; 1726 1727 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1728} 1729 1730void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1731{ 1732 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1733 1734 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1735 1736 /* mesh already went down */ 1737 if (!sdata->u.mesh.mesh_id_len) 1738 return; 1739 1740 if (ifmsh->preq_queue_len && 1741 time_after(jiffies, 1742 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1743 mesh_path_start_discovery(sdata); 1744 1745 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1746 ieee80211_mesh_housekeeping(sdata); 1747 1748 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1749 ieee80211_mesh_rootpath(sdata); 1750 1751 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1752 mesh_sync_adjust_tsf(sdata); 1753 1754 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1755 mesh_bss_info_changed(sdata); 1756} 1757 1758 1759void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1760{ 1761 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1762 static u8 zero_addr[ETH_ALEN] = {}; 1763 1764 timer_setup(&ifmsh->housekeeping_timer, 1765 ieee80211_mesh_housekeeping_timer, 0); 1766 1767 ifmsh->accepting_plinks = true; 1768 atomic_set(&ifmsh->mpaths, 0); 1769 mesh_rmc_init(sdata); 1770 ifmsh->last_preq = jiffies; 1771 ifmsh->next_perr = jiffies; 1772 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1773 /* Allocate all mesh structures when creating the first mesh interface. */ 1774 if (!mesh_allocated) 1775 ieee80211s_init(); 1776 1777 mesh_pathtbl_init(sdata); 1778 1779 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1780 timer_setup(&ifmsh->mesh_path_root_timer, 1781 ieee80211_mesh_path_root_timer, 0); 1782 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1783 skb_queue_head_init(&ifmsh->ps.bc_buf); 1784 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1785 spin_lock_init(&ifmsh->sync_offset_lock); 1786 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1787 1788 sdata->vif.bss_conf.bssid = zero_addr; 1789} 1790 1791void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1792{ 1793 mesh_rmc_free(sdata); 1794 mesh_pathtbl_unregister(sdata); 1795} 1796