1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008, 2009 open80211s Ltd. 4 * Copyright (C) 2018-2026 Intel Corporation 5 * Authors: Luis Carlos Cobo <luisca@cozybit.com> 6 * Javier Cardona <javier@cozybit.com> 7 */ 8 9 #include <linux/slab.h> 10 #include <linux/unaligned.h> 11 #include <net/sock.h> 12 #include "ieee80211_i.h" 13 #include "mesh.h" 14 #include "wme.h" 15 #include "driver-ops.h" 16 17 static int mesh_allocated; 18 static struct kmem_cache *rm_cache; 19 20 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) 21 { 22 return mgmt->u.action.action_code == 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 timer_container_of(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 (!ie->mesh_config) 82 return false; 83 84 if (!(ifmsh->mesh_id_len == ie->mesh_id_len && 85 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 86 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && 87 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && 88 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && 89 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && 90 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) 91 return false; 92 93 sband = ieee80211_get_sband(sdata); 94 if (!sband) 95 return false; 96 97 ieee80211_sta_get_rates(sdata, ie, sband->band, 98 &basic_rates); 99 100 if (sdata->vif.bss_conf.basic_rates != basic_rates) 101 return false; 102 103 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chanreq.oper.chan, 104 NL80211_CHAN_NO_HT); 105 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); 106 107 if (ie->vht_cap_elem) 108 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); 109 110 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 111 ie->vht_operation, ie->ht_operation, 112 &sta_chan_def); 113 ieee80211_chandef_he_6ghz_oper(sdata->local, ie->he_operation, 114 ie->eht_operation, 115 &sta_chan_def); 116 117 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chanreq.oper, 118 &sta_chan_def)) 119 return false; 120 121 return true; 122 } 123 124 /** 125 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 126 * 127 * @ie: information elements of a management frame from the mesh peer 128 * 129 * Returns: %true if the mesh peer is willing to establish peer links 130 */ 131 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 132 { 133 return (ie->mesh_config->meshconf_cap & 134 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 135 } 136 137 /** 138 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 139 * 140 * @sdata: mesh interface in which mesh beacons are going to be updated 141 * 142 * Returns: beacon changed flag if the beacon content changed. 143 */ 144 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 145 { 146 bool free_plinks; 147 u64 changed = 0; 148 149 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 150 * the mesh interface might be able to establish plinks with peers that 151 * are already on the table but are not on PLINK_ESTAB state. However, 152 * in general the mesh interface is not accepting peer link requests 153 * from new peers, and that must be reflected in the beacon 154 */ 155 free_plinks = mesh_plink_availables(sdata); 156 157 if (free_plinks != sdata->u.mesh.accepting_plinks) { 158 sdata->u.mesh.accepting_plinks = free_plinks; 159 changed = BSS_CHANGED_BEACON; 160 } 161 162 return changed; 163 } 164 165 /* 166 * mesh_sta_cleanup - clean up any mesh sta state 167 * 168 * @sta: mesh sta to clean up. 169 */ 170 void mesh_sta_cleanup(struct sta_info *sta) 171 { 172 struct ieee80211_sub_if_data *sdata = sta->sdata; 173 u64 changed = mesh_plink_deactivate(sta); 174 175 if (changed) 176 ieee80211_mbss_info_change_notify(sdata, changed); 177 } 178 179 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 180 { 181 int i; 182 183 sdata->u.mesh.rmc = kmalloc_obj(struct mesh_rmc); 184 if (!sdata->u.mesh.rmc) 185 return -ENOMEM; 186 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 187 for (i = 0; i < RMC_BUCKETS; i++) 188 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 189 return 0; 190 } 191 192 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 193 { 194 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 195 struct rmc_entry *p; 196 struct hlist_node *n; 197 int i; 198 199 if (!sdata->u.mesh.rmc) 200 return; 201 202 for (i = 0; i < RMC_BUCKETS; i++) { 203 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 204 hlist_del(&p->list); 205 kmem_cache_free(rm_cache, p); 206 } 207 } 208 209 kfree(rmc); 210 sdata->u.mesh.rmc = NULL; 211 } 212 213 /** 214 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 215 * 216 * @sdata: interface 217 * @sa: source address 218 * @mesh_hdr: mesh_header 219 * 220 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 221 * 222 * Checks using the source address and the mesh sequence number if we have 223 * received this frame lately. If the frame is not in the cache, it is added to 224 * it. 225 */ 226 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 227 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 228 { 229 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 230 u32 seqnum = 0; 231 int entries = 0; 232 u8 idx; 233 struct rmc_entry *p; 234 struct hlist_node *n; 235 236 if (!rmc) 237 return -1; 238 239 /* Don't care about endianness since only match matters */ 240 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 241 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 242 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 243 ++entries; 244 if (time_after(jiffies, p->exp_time) || 245 entries == RMC_QUEUE_MAX_LEN) { 246 hlist_del(&p->list); 247 kmem_cache_free(rm_cache, p); 248 --entries; 249 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 250 return -1; 251 } 252 253 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 254 if (!p) 255 return 0; 256 257 p->seqnum = seqnum; 258 p->exp_time = jiffies + RMC_TIMEOUT; 259 memcpy(p->sa, sa, ETH_ALEN); 260 hlist_add_head(&p->list, &rmc->bucket[idx]); 261 return 0; 262 } 263 264 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 265 struct sk_buff *skb) 266 { 267 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 268 u8 *pos, neighbors; 269 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 270 bool is_connected_to_gate = ifmsh->num_gates > 0 || 271 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 272 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 273 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 274 275 if (skb_tailroom(skb) < 2 + meshconf_len) 276 return -ENOMEM; 277 278 pos = skb_put(skb, 2 + meshconf_len); 279 *pos++ = WLAN_EID_MESH_CONFIG; 280 *pos++ = meshconf_len; 281 282 /* save a pointer for quick updates in pre-tbtt */ 283 ifmsh->meshconf_offset = pos - skb->data; 284 285 /* Active path selection protocol ID */ 286 *pos++ = ifmsh->mesh_pp_id; 287 /* Active path selection metric ID */ 288 *pos++ = ifmsh->mesh_pm_id; 289 /* Congestion control mode identifier */ 290 *pos++ = ifmsh->mesh_cc_id; 291 /* Synchronization protocol identifier */ 292 *pos++ = ifmsh->mesh_sp_id; 293 /* Authentication Protocol identifier */ 294 *pos++ = ifmsh->mesh_auth_id; 295 /* Mesh Formation Info - number of neighbors */ 296 neighbors = atomic_read(&ifmsh->estab_plinks); 297 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 298 *pos++ = (is_connected_to_as << 7) | 299 (neighbors << 1) | 300 is_connected_to_gate; 301 /* Mesh capability */ 302 *pos = 0x00; 303 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 304 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 305 *pos |= ifmsh->accepting_plinks ? 306 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 307 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 308 *pos |= ifmsh->ps_peers_deep_sleep ? 309 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 310 return 0; 311 } 312 313 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 314 { 315 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 316 u8 *pos; 317 318 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 319 return -ENOMEM; 320 321 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 322 *pos++ = WLAN_EID_MESH_ID; 323 *pos++ = ifmsh->mesh_id_len; 324 if (ifmsh->mesh_id_len) 325 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 326 327 return 0; 328 } 329 330 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 331 struct sk_buff *skb) 332 { 333 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 334 u8 *pos; 335 336 /* see IEEE802.11-2012 13.14.6 */ 337 if (ifmsh->ps_peers_light_sleep == 0 && 338 ifmsh->ps_peers_deep_sleep == 0 && 339 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 340 return 0; 341 342 if (skb_tailroom(skb) < 4) 343 return -ENOMEM; 344 345 pos = skb_put(skb, 2 + 2); 346 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 347 *pos++ = 2; 348 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 349 350 return 0; 351 } 352 353 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 354 struct sk_buff *skb) 355 { 356 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 357 u8 offset, len; 358 const u8 *data; 359 360 if (!ifmsh->ie || !ifmsh->ie_len) 361 return 0; 362 363 /* fast-forward to vendor IEs */ 364 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 365 366 if (offset < ifmsh->ie_len) { 367 len = ifmsh->ie_len - offset; 368 data = ifmsh->ie + offset; 369 if (skb_tailroom(skb) < len) 370 return -ENOMEM; 371 skb_put_data(skb, data, len); 372 } 373 374 return 0; 375 } 376 377 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 378 { 379 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 380 u8 len = 0; 381 const u8 *data; 382 383 if (!ifmsh->ie || !ifmsh->ie_len) 384 return 0; 385 386 /* find RSN IE */ 387 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 388 if (!data) 389 return 0; 390 391 len = data[1] + 2; 392 393 if (skb_tailroom(skb) < len) 394 return -ENOMEM; 395 skb_put_data(skb, data, len); 396 397 return 0; 398 } 399 400 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 401 struct sk_buff *skb) 402 { 403 struct ieee80211_chanctx_conf *chanctx_conf; 404 struct ieee80211_channel *chan; 405 u8 *pos; 406 407 if (skb_tailroom(skb) < 3) 408 return -ENOMEM; 409 410 rcu_read_lock(); 411 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 412 if (WARN_ON(!chanctx_conf)) { 413 rcu_read_unlock(); 414 return -EINVAL; 415 } 416 chan = chanctx_conf->def.chan; 417 rcu_read_unlock(); 418 419 pos = skb_put(skb, 2 + 1); 420 *pos++ = WLAN_EID_DS_PARAMS; 421 *pos++ = 1; 422 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 423 424 return 0; 425 } 426 427 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 428 struct sk_buff *skb) 429 { 430 struct ieee80211_supported_band *sband; 431 u8 *pos; 432 433 sband = ieee80211_get_sband(sdata); 434 if (!sband) 435 return -EINVAL; 436 437 /* HT not allowed in 6 GHz */ 438 if (sband->band == NL80211_BAND_6GHZ) 439 return 0; 440 441 if (!sband->ht_cap.ht_supported || 442 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 443 return 0; 444 445 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 446 return -ENOMEM; 447 448 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 449 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 450 451 return 0; 452 } 453 454 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 455 struct sk_buff *skb) 456 { 457 struct ieee80211_local *local = sdata->local; 458 struct ieee80211_chanctx_conf *chanctx_conf; 459 struct ieee80211_channel *channel; 460 struct ieee80211_supported_band *sband; 461 struct ieee80211_sta_ht_cap *ht_cap; 462 u8 *pos; 463 464 rcu_read_lock(); 465 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 466 if (WARN_ON(!chanctx_conf)) { 467 rcu_read_unlock(); 468 return -EINVAL; 469 } 470 channel = chanctx_conf->def.chan; 471 rcu_read_unlock(); 472 473 sband = local->hw.wiphy->bands[channel->band]; 474 ht_cap = &sband->ht_cap; 475 476 /* HT not allowed in 6 GHz */ 477 if (sband->band == NL80211_BAND_6GHZ) 478 return 0; 479 480 if (!ht_cap->ht_supported || 481 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 482 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.chanreq.oper, 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.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 511 return 0; 512 513 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 514 return -ENOMEM; 515 516 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 517 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 518 519 return 0; 520 } 521 522 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 523 struct sk_buff *skb) 524 { 525 struct ieee80211_local *local = sdata->local; 526 struct ieee80211_chanctx_conf *chanctx_conf; 527 struct ieee80211_channel *channel; 528 struct ieee80211_supported_band *sband; 529 struct ieee80211_sta_vht_cap *vht_cap; 530 u8 *pos; 531 532 rcu_read_lock(); 533 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 534 if (WARN_ON(!chanctx_conf)) { 535 rcu_read_unlock(); 536 return -EINVAL; 537 } 538 channel = chanctx_conf->def.chan; 539 rcu_read_unlock(); 540 541 sband = local->hw.wiphy->bands[channel->band]; 542 vht_cap = &sband->vht_cap; 543 544 /* VHT not allowed in 6 GHz */ 545 if (sband->band == NL80211_BAND_6GHZ) 546 return 0; 547 548 if (!vht_cap->vht_supported || 549 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 550 return 0; 551 552 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 553 return -ENOMEM; 554 555 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 556 ieee80211_ie_build_vht_oper(pos, vht_cap, 557 &sdata->vif.bss_conf.chanreq.oper); 558 559 return 0; 560 } 561 562 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 563 struct sk_buff *skb, u8 ie_len) 564 { 565 struct ieee80211_supported_band *sband; 566 567 sband = ieee80211_get_sband(sdata); 568 if (!sband) 569 return -EINVAL; 570 571 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 572 return 0; 573 574 return ieee80211_put_he_cap(skb, sdata, sband, NULL); 575 } 576 577 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 578 struct sk_buff *skb) 579 { 580 const struct ieee80211_sta_he_cap *he_cap; 581 struct ieee80211_supported_band *sband; 582 u32 len; 583 u8 *pos; 584 585 sband = ieee80211_get_sband(sdata); 586 if (!sband) 587 return -EINVAL; 588 589 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 590 if (!he_cap || 591 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 592 return 0; 593 594 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 595 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ) 596 len += sizeof(struct ieee80211_he_6ghz_oper); 597 598 if (skb_tailroom(skb) < len) 599 return -ENOMEM; 600 601 pos = skb_put(skb, len); 602 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper); 603 604 return 0; 605 } 606 607 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 608 struct sk_buff *skb) 609 { 610 struct ieee80211_supported_band *sband; 611 const struct ieee80211_sband_iftype_data *iftd; 612 613 sband = ieee80211_get_sband(sdata); 614 if (!sband) 615 return -EINVAL; 616 617 if (sband->band != NL80211_BAND_6GHZ) 618 return 0; 619 620 iftd = ieee80211_get_sband_iftype_data(sband, 621 NL80211_IFTYPE_MESH_POINT); 622 /* The device doesn't support HE in mesh mode or at all */ 623 if (!iftd) 624 return 0; 625 626 ieee80211_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode); 627 return 0; 628 } 629 630 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 631 struct sk_buff *skb, u8 ie_len) 632 { 633 struct ieee80211_supported_band *sband; 634 635 sband = ieee80211_get_sband(sdata); 636 if (!sband) 637 return -EINVAL; 638 639 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 640 return 0; 641 642 return ieee80211_put_eht_cap(skb, sdata, sband, NULL); 643 } 644 645 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 646 { 647 const struct ieee80211_sta_eht_cap *eht_cap; 648 struct ieee80211_supported_band *sband; 649 u32 len; 650 u8 *pos; 651 652 sband = ieee80211_get_sband(sdata); 653 if (!sband) 654 return -EINVAL; 655 656 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 657 if (!eht_cap || 658 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 659 return 0; 660 661 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 662 offsetof(struct ieee80211_eht_operation_info, optional); 663 664 if (skb_tailroom(skb) < len) 665 return -ENOMEM; 666 667 pos = skb_put(skb, len); 668 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap); 669 670 return 0; 671 } 672 673 static void ieee80211_mesh_path_timer(struct timer_list *t) 674 { 675 struct ieee80211_sub_if_data *sdata = 676 timer_container_of(sdata, t, u.mesh.mesh_path_timer); 677 678 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 679 } 680 681 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 682 { 683 struct ieee80211_sub_if_data *sdata = 684 timer_container_of(sdata, t, u.mesh.mesh_path_root_timer); 685 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 686 687 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 688 689 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 690 } 691 692 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 693 { 694 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 695 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 696 else { 697 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 698 /* stop running timer */ 699 timer_delete_sync(&ifmsh->mesh_path_root_timer); 700 } 701 } 702 703 static void 704 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 705 u8 *ie, u8 ie_len) 706 { 707 struct ieee80211_supported_band *sband; 708 const struct element *cap; 709 const struct ieee80211_he_operation *he_oper = NULL; 710 711 sband = ieee80211_get_sband(sdata); 712 if (!sband) 713 return; 714 715 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 716 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT) 717 return; 718 719 sdata->vif.bss_conf.he_support = true; 720 721 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 722 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 723 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 724 he_oper = (void *)(cap->data + 1); 725 726 if (he_oper) 727 sdata->vif.bss_conf.he_oper.params = 728 __le32_to_cpu(he_oper->he_oper_params); 729 730 sdata->vif.bss_conf.eht_support = 731 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 732 } 733 734 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 735 struct sk_buff *skb, u32 ctrl_flags) 736 { 737 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 738 struct ieee80211_mesh_fast_tx_key key = { 739 .type = MESH_FAST_TX_TYPE_LOCAL 740 }; 741 struct ieee80211_mesh_fast_tx *entry; 742 struct ieee80211s_hdr *meshhdr; 743 u8 sa[ETH_ALEN] __aligned(2); 744 struct tid_ampdu_tx *tid_tx; 745 struct sta_info *sta; 746 bool copy_sa = false; 747 u16 ethertype; 748 u8 tid; 749 750 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 751 return false; 752 753 if (ifmsh->mshcfg.dot11MeshNolearn) 754 return false; 755 756 /* Add support for these cases later */ 757 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 758 return false; 759 760 if (is_multicast_ether_addr(skb->data)) 761 return false; 762 763 ethertype = (skb->data[12] << 8) | skb->data[13]; 764 if (ethertype < ETH_P_802_3_MIN) 765 return false; 766 767 if (sk_requests_wifi_status(skb->sk)) 768 return false; 769 770 if (skb->ip_summed == CHECKSUM_PARTIAL) { 771 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 772 if (skb_checksum_help(skb)) 773 return false; 774 } 775 776 ether_addr_copy(key.addr, skb->data); 777 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr)) 778 key.type = MESH_FAST_TX_TYPE_PROXIED; 779 entry = mesh_fast_tx_get(sdata, &key); 780 if (!entry) 781 return false; 782 783 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 784 return false; 785 786 sta = rcu_dereference(entry->mpath->next_hop); 787 if (!sta) 788 return false; 789 790 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 791 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 792 if (tid_tx) { 793 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 794 return false; 795 if (tid_tx->timeout) 796 tid_tx->last_tx = jiffies; 797 } 798 799 skb = skb_share_check(skb, GFP_ATOMIC); 800 if (!skb) 801 return true; 802 803 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 804 805 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 806 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 807 /* preserve SA from eth header for 6-addr frames */ 808 ether_addr_copy(sa, skb->data + ETH_ALEN); 809 copy_sa = true; 810 } 811 812 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 813 entry->hdrlen); 814 815 meshhdr = (struct ieee80211s_hdr *)skb->data; 816 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 817 &meshhdr->seqnum); 818 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 819 if (copy_sa) 820 ether_addr_copy(meshhdr->eaddr2, sa); 821 822 skb_push(skb, 2 * ETH_ALEN); 823 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 824 entry->mpath->dst, sdata->vif.addr); 825 826 return true; 827 } 828 829 /** 830 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 831 * @hdr: 802.11 frame header 832 * @fc: frame control field 833 * @meshda: destination address in the mesh 834 * @meshsa: source address in the mesh. Same as TA, as frame is 835 * locally originated. 836 * 837 * Returns: the length of the 802.11 frame header (excludes mesh control header) 838 */ 839 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 840 const u8 *meshda, const u8 *meshsa) 841 { 842 if (is_multicast_ether_addr(meshda)) { 843 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 844 /* DA TA SA */ 845 memcpy(hdr->addr1, meshda, ETH_ALEN); 846 memcpy(hdr->addr2, meshsa, ETH_ALEN); 847 memcpy(hdr->addr3, meshsa, ETH_ALEN); 848 return 24; 849 } else { 850 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 851 /* RA TA DA SA */ 852 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 853 memcpy(hdr->addr2, meshsa, ETH_ALEN); 854 memcpy(hdr->addr3, meshda, ETH_ALEN); 855 memcpy(hdr->addr4, meshsa, ETH_ALEN); 856 return 30; 857 } 858 } 859 860 /** 861 * ieee80211_new_mesh_header - create a new mesh header 862 * @sdata: mesh interface to be used 863 * @meshhdr: uninitialized mesh header 864 * @addr4or5: 1st address in the ae header, which may correspond to address 4 865 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 866 * be NULL. 867 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 868 * mesh frame 869 * 870 * Returns: the header length 871 */ 872 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 873 struct ieee80211s_hdr *meshhdr, 874 const char *addr4or5, const char *addr6) 875 { 876 if (WARN_ON(!addr4or5 && addr6)) 877 return 0; 878 879 memset(meshhdr, 0, sizeof(*meshhdr)); 880 881 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 882 883 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 884 &meshhdr->seqnum); 885 if (addr4or5 && !addr6) { 886 meshhdr->flags |= MESH_FLAGS_AE_A4; 887 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 888 return 2 * ETH_ALEN; 889 } else if (addr4or5 && addr6) { 890 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 891 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 892 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 893 return 3 * ETH_ALEN; 894 } 895 896 return ETH_ALEN; 897 } 898 899 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 900 { 901 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 902 u64 changed; 903 904 if (ifmsh->mshcfg.plink_timeout > 0) 905 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 906 mesh_path_expire(sdata); 907 908 changed = mesh_accept_plinks_update(sdata); 909 ieee80211_mbss_info_change_notify(sdata, changed); 910 911 mesh_fast_tx_gc(sdata); 912 913 mod_timer(&ifmsh->housekeeping_timer, 914 round_jiffies(jiffies + 915 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 916 } 917 918 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 919 { 920 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 921 u32 interval; 922 923 mesh_path_tx_root_frame(sdata); 924 925 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 926 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 927 else 928 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 929 930 mod_timer(&ifmsh->mesh_path_root_timer, 931 round_jiffies(TU_TO_EXP_TIME(interval))); 932 } 933 934 static int 935 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 936 { 937 struct beacon_data *bcn; 938 int head_len, tail_len; 939 struct sk_buff *skb; 940 struct ieee80211_mgmt *mgmt; 941 struct mesh_csa_settings *csa; 942 const struct ieee80211_supported_band *sband; 943 u8 ie_len_he_cap, ie_len_eht_cap; 944 u8 *pos; 945 struct ieee80211_sub_if_data *sdata; 946 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 947 948 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 949 950 sband = ieee80211_get_sband(sdata); 951 952 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata); 953 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata); 954 head_len = hdr_len + 955 2 + /* NULL SSID */ 956 /* Channel Switch Announcement */ 957 2 + sizeof(struct ieee80211_channel_sw_ie) + 958 /* Mesh Channel Switch Parameters */ 959 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 960 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 961 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 962 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 963 2 + 8 + /* supported rates */ 964 2 + 3; /* DS params */ 965 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 966 2 + sizeof(struct ieee80211_ht_cap) + 967 2 + sizeof(struct ieee80211_ht_operation) + 968 2 + ifmsh->mesh_id_len + 969 2 + sizeof(struct ieee80211_meshconf_ie) + 970 2 + sizeof(__le16) + /* awake window */ 971 2 + sizeof(struct ieee80211_vht_cap) + 972 2 + sizeof(struct ieee80211_vht_operation) + 973 ie_len_he_cap + 974 2 + 1 + sizeof(struct ieee80211_he_operation) + 975 sizeof(struct ieee80211_he_6ghz_oper) + 976 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 977 ie_len_eht_cap + 978 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 979 offsetof(struct ieee80211_eht_operation_info, optional) + 980 ifmsh->ie_len; 981 982 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 983 /* need an skb for IE builders to operate on */ 984 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 985 986 if (!bcn || !skb) 987 goto out_free; 988 989 /* 990 * pointers go into the block we allocated, 991 * memory is | beacon_data | head | tail | 992 */ 993 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 994 995 /* fill in the head */ 996 mgmt = skb_put_zero(skb, hdr_len); 997 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 998 IEEE80211_STYPE_BEACON); 999 eth_broadcast_addr(mgmt->da); 1000 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1001 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1002 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1003 mgmt->u.beacon.beacon_int = 1004 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1005 mgmt->u.beacon.capab_info |= cpu_to_le16( 1006 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1007 1008 pos = skb_put(skb, 2); 1009 *pos++ = WLAN_EID_SSID; 1010 *pos++ = 0x0; 1011 1012 rcu_read_lock(); 1013 csa = rcu_dereference(ifmsh->csa); 1014 if (csa) { 1015 enum nl80211_channel_type ct; 1016 struct cfg80211_chan_def *chandef; 1017 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1018 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1019 1020 pos = skb_put_zero(skb, ie_len); 1021 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1022 *pos++ = 3; 1023 *pos++ = 0x0; 1024 *pos++ = ieee80211_frequency_to_channel( 1025 csa->settings.chandef.chan->center_freq); 1026 bcn->cntdwn_current_counter = csa->settings.count; 1027 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1028 *pos++ = csa->settings.count; 1029 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1030 *pos++ = 6; 1031 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1032 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1033 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1034 } else { 1035 *pos++ = ifmsh->chsw_ttl; 1036 } 1037 *pos++ |= csa->settings.block_tx ? 1038 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1039 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1040 pos += 2; 1041 put_unaligned_le16(ifmsh->pre_value, pos); 1042 pos += 2; 1043 1044 switch (csa->settings.chandef.width) { 1045 case NL80211_CHAN_WIDTH_40: 1046 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1047 pos = skb_put_zero(skb, ie_len); 1048 1049 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1050 *pos++ = 1; /* len */ 1051 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1052 if (ct == NL80211_CHAN_HT40PLUS) 1053 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1054 else 1055 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1056 break; 1057 case NL80211_CHAN_WIDTH_80: 1058 case NL80211_CHAN_WIDTH_80P80: 1059 case NL80211_CHAN_WIDTH_160: 1060 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1061 ie_len = 2 + 2 + 1062 sizeof(struct ieee80211_wide_bw_chansw_ie); 1063 pos = skb_put_zero(skb, ie_len); 1064 1065 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1066 *pos++ = 5; /* len */ 1067 /* put sub IE */ 1068 chandef = &csa->settings.chandef; 1069 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1070 break; 1071 default: 1072 break; 1073 } 1074 } 1075 rcu_read_unlock(); 1076 1077 if (ieee80211_put_srates_elem(skb, sband, 1078 sdata->vif.bss_conf.basic_rates, 1079 0, WLAN_EID_SUPP_RATES) || 1080 mesh_add_ds_params_ie(sdata, skb)) 1081 goto out_free; 1082 1083 bcn->head_len = skb->len; 1084 memcpy(bcn->head, skb->data, bcn->head_len); 1085 1086 /* now the tail */ 1087 skb_trim(skb, 0); 1088 bcn->tail = bcn->head + bcn->head_len; 1089 1090 if (ieee80211_put_srates_elem(skb, sband, 1091 sdata->vif.bss_conf.basic_rates, 1092 0, WLAN_EID_EXT_SUPP_RATES) || 1093 mesh_add_rsn_ie(sdata, skb) || 1094 mesh_add_ht_cap_ie(sdata, skb) || 1095 mesh_add_ht_oper_ie(sdata, skb) || 1096 mesh_add_meshid_ie(sdata, skb) || 1097 mesh_add_meshconf_ie(sdata, skb) || 1098 mesh_add_awake_window_ie(sdata, skb) || 1099 mesh_add_vht_cap_ie(sdata, skb) || 1100 mesh_add_vht_oper_ie(sdata, skb) || 1101 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1102 mesh_add_he_oper_ie(sdata, skb) || 1103 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1104 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1105 mesh_add_eht_oper_ie(sdata, skb) || 1106 mesh_add_vendor_ies(sdata, skb)) 1107 goto out_free; 1108 1109 bcn->tail_len = skb->len; 1110 memcpy(bcn->tail, skb->data, bcn->tail_len); 1111 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1112 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1113 (bcn->tail + ifmsh->meshconf_offset); 1114 1115 dev_kfree_skb(skb); 1116 rcu_assign_pointer(ifmsh->beacon, bcn); 1117 return 0; 1118 out_free: 1119 kfree(bcn); 1120 dev_kfree_skb(skb); 1121 return -ENOMEM; 1122 } 1123 1124 static int 1125 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1126 { 1127 struct beacon_data *old_bcn; 1128 int ret; 1129 1130 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1131 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1132 if (ret) 1133 /* just reuse old beacon */ 1134 return ret; 1135 1136 if (old_bcn) 1137 kfree_rcu(old_bcn, rcu_head); 1138 return 0; 1139 } 1140 1141 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1142 u64 changed) 1143 { 1144 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1145 unsigned long bits[] = { BITMAP_FROM_U64(changed) }; 1146 u32 bit; 1147 1148 if (!changed) 1149 return; 1150 1151 /* if we race with running work, worst case this work becomes a noop */ 1152 for_each_set_bit(bit, bits, sizeof(changed) * BITS_PER_BYTE) 1153 set_bit(bit, ifmsh->mbss_changed); 1154 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1155 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1156 } 1157 1158 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1159 { 1160 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1161 struct ieee80211_local *local = sdata->local; 1162 u64 changed = BSS_CHANGED_BEACON | 1163 BSS_CHANGED_BEACON_ENABLED | 1164 BSS_CHANGED_HT | 1165 BSS_CHANGED_BASIC_RATES | 1166 BSS_CHANGED_BEACON_INT | 1167 BSS_CHANGED_MCAST_RATE; 1168 1169 local->fif_other_bss++; 1170 /* mesh ifaces must set allmulti to forward mcast traffic */ 1171 atomic_inc(&local->iff_allmultis); 1172 ieee80211_configure_filter(local); 1173 1174 ifmsh->mesh_cc_id = 0; /* Disabled */ 1175 /* register sync ops from extensible synchronization framework */ 1176 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1177 ifmsh->sync_offset_clockdrift_max = 0; 1178 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1179 ieee80211_mesh_root_setup(ifmsh); 1180 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1181 sdata->vif.bss_conf.ht_operation_mode = 1182 ifmsh->mshcfg.ht_opmode; 1183 sdata->vif.bss_conf.enable_beacon = true; 1184 1185 changed |= ieee80211_mps_local_status_update(sdata); 1186 1187 if (ieee80211_mesh_build_beacon(ifmsh)) { 1188 ieee80211_stop_mesh(sdata); 1189 return -ENOMEM; 1190 } 1191 1192 ieee80211_recalc_dtim(sdata, drv_get_tsf(local, sdata)); 1193 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1194 1195 netif_carrier_on(sdata->dev); 1196 return 0; 1197 } 1198 1199 static void ieee80211_mesh_reset_csa(struct ieee80211_sub_if_data *sdata) 1200 { 1201 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1202 struct mesh_csa_settings *csa; 1203 1204 /* Reset the TTL value and Initiator flag */ 1205 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1206 ifmsh->chsw_ttl = 0; 1207 1208 /* Remove the CSA and MCSP elements from the beacon */ 1209 csa = sdata_dereference(ifmsh->csa, sdata); 1210 RCU_INIT_POINTER(ifmsh->csa, NULL); 1211 kfree_rcu(csa, rcu_head); 1212 } 1213 1214 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1215 { 1216 struct ieee80211_local *local = sdata->local; 1217 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1218 struct beacon_data *bcn; 1219 1220 netif_carrier_off(sdata->dev); 1221 1222 /* abort any running channel switch */ 1223 sdata->vif.bss_conf.csa_active = false; 1224 ieee80211_mesh_reset_csa(sdata); 1225 ieee80211_vif_unblock_queues_csa(sdata); 1226 1227 /* flush STAs and mpaths on this iface */ 1228 sta_info_flush(sdata, -1); 1229 ieee80211_free_keys(sdata, true); 1230 mesh_path_flush_by_iface(sdata); 1231 1232 /* stop the beacon */ 1233 ifmsh->mesh_id_len = 0; 1234 sdata->vif.bss_conf.enable_beacon = false; 1235 sdata->beacon_rate_set = false; 1236 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1237 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1238 BSS_CHANGED_BEACON_ENABLED); 1239 1240 /* remove beacon */ 1241 bcn = sdata_dereference(ifmsh->beacon, sdata); 1242 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1243 kfree_rcu(bcn, rcu_head); 1244 1245 /* free all potentially still buffered group-addressed frames */ 1246 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1247 skb_queue_purge(&ifmsh->ps.bc_buf); 1248 1249 timer_delete_sync(&sdata->u.mesh.housekeeping_timer); 1250 timer_delete_sync(&sdata->u.mesh.mesh_path_root_timer); 1251 timer_delete_sync(&sdata->u.mesh.mesh_path_timer); 1252 1253 /* clear any mesh work (for next join) we may have accrued */ 1254 ifmsh->wrkq_flags = 0; 1255 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1256 1257 local->fif_other_bss--; 1258 atomic_dec(&local->iff_allmultis); 1259 ieee80211_configure_filter(local); 1260 } 1261 1262 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1263 { 1264 int err; 1265 1266 /* if the current channel is a DFS channel, mark the channel as 1267 * unavailable. 1268 */ 1269 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1270 &sdata->vif.bss_conf.chanreq.oper, 1271 NL80211_IFTYPE_MESH_POINT); 1272 if (err > 0) 1273 cfg80211_radar_event(sdata->local->hw.wiphy, 1274 &sdata->vif.bss_conf.chanreq.oper, 1275 GFP_ATOMIC); 1276 } 1277 1278 static bool 1279 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1280 struct ieee802_11_elems *elems, bool beacon) 1281 { 1282 struct cfg80211_csa_settings params; 1283 struct ieee80211_csa_ie csa_ie; 1284 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1285 struct ieee80211_supported_band *sband; 1286 int err; 1287 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited; 1288 u32 vht_cap_info = 0; 1289 1290 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1291 1292 sband = ieee80211_get_sband(sdata); 1293 if (!sband) 1294 return false; 1295 1296 switch (sdata->vif.bss_conf.chanreq.oper.width) { 1297 case NL80211_CHAN_WIDTH_20_NOHT: 1298 conn.mode = IEEE80211_CONN_MODE_LEGACY; 1299 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1300 break; 1301 case NL80211_CHAN_WIDTH_20: 1302 conn.mode = IEEE80211_CONN_MODE_HT; 1303 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1304 break; 1305 case NL80211_CHAN_WIDTH_40: 1306 conn.mode = IEEE80211_CONN_MODE_HT; 1307 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40; 1308 break; 1309 default: 1310 break; 1311 } 1312 1313 if (elems->vht_cap_elem) 1314 vht_cap_info = 1315 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1316 1317 memset(¶ms, 0, sizeof(params)); 1318 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1319 vht_cap_info, &conn, 1320 sdata->vif.addr, false, 1321 &csa_ie); 1322 if (err < 0) 1323 return false; 1324 if (err) 1325 return false; 1326 1327 /* Mark the channel unavailable if the reason for the switch is 1328 * regulatory. 1329 */ 1330 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1331 ieee80211_mesh_csa_mark_radar(sdata); 1332 1333 params.chandef = csa_ie.chanreq.oper; 1334 params.count = csa_ie.count; 1335 1336 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1337 IEEE80211_CHAN_DISABLED) || 1338 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1339 NL80211_IFTYPE_MESH_POINT)) { 1340 sdata_info(sdata, 1341 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1342 sdata->vif.addr, 1343 params.chandef.chan->center_freq, 1344 params.chandef.width, 1345 params.chandef.center_freq1, 1346 params.chandef.center_freq2); 1347 return false; 1348 } 1349 1350 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1351 ¶ms.chandef, 1352 NL80211_IFTYPE_MESH_POINT); 1353 if (err < 0) 1354 return false; 1355 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1356 sdata_info(sdata, 1357 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1358 sdata->vif.addr, 1359 params.chandef.chan->center_freq, 1360 params.chandef.width, 1361 params.chandef.center_freq1, 1362 params.chandef.center_freq2); 1363 return false; 1364 } 1365 1366 params.radar_required = err; 1367 1368 if (cfg80211_chandef_identical(¶ms.chandef, 1369 &sdata->vif.bss_conf.chanreq.oper)) { 1370 mcsa_dbg(sdata, 1371 "received csa with an identical chandef, ignoring\n"); 1372 return true; 1373 } 1374 1375 mcsa_dbg(sdata, 1376 "received channel switch announcement to go to channel %d MHz\n", 1377 params.chandef.chan->center_freq); 1378 1379 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1380 if (beacon) { 1381 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1382 if (ifmsh->pre_value >= csa_ie.pre_value) 1383 return false; 1384 ifmsh->pre_value = csa_ie.pre_value; 1385 } 1386 1387 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1388 return false; 1389 1390 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1391 1392 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1393 ¶ms) < 0) 1394 return false; 1395 1396 return true; 1397 } 1398 1399 static void 1400 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1401 struct ieee80211_mgmt *mgmt, size_t len) 1402 { 1403 struct ieee80211_local *local = sdata->local; 1404 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1405 struct sk_buff *presp; 1406 struct beacon_data *bcn; 1407 struct ieee80211_mgmt *hdr; 1408 struct ieee802_11_elems *elems; 1409 size_t baselen; 1410 u8 *pos; 1411 1412 pos = mgmt->u.probe_req.variable; 1413 baselen = (u8 *) pos - (u8 *) mgmt; 1414 if (baselen > len) 1415 return; 1416 1417 elems = ieee802_11_parse_elems(pos, len - baselen, 1418 IEEE80211_FTYPE_MGMT | 1419 IEEE80211_STYPE_PROBE_REQ, 1420 NULL); 1421 if (!elems) 1422 return; 1423 1424 if (!elems->mesh_id) 1425 goto free; 1426 1427 /* 802.11-2012 10.1.4.3.2 */ 1428 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1429 !is_broadcast_ether_addr(mgmt->da)) || 1430 elems->ssid_len != 0) 1431 goto free; 1432 1433 if (elems->mesh_id_len != 0 && 1434 (elems->mesh_id_len != ifmsh->mesh_id_len || 1435 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1436 goto free; 1437 1438 rcu_read_lock(); 1439 bcn = rcu_dereference(ifmsh->beacon); 1440 1441 if (!bcn) 1442 goto out; 1443 1444 presp = dev_alloc_skb(local->tx_headroom + 1445 bcn->head_len + bcn->tail_len); 1446 if (!presp) 1447 goto out; 1448 1449 skb_reserve(presp, local->tx_headroom); 1450 skb_put_data(presp, bcn->head, bcn->head_len); 1451 skb_put_data(presp, bcn->tail, bcn->tail_len); 1452 hdr = (struct ieee80211_mgmt *) presp->data; 1453 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1454 IEEE80211_STYPE_PROBE_RESP); 1455 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1456 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1457 ieee80211_tx_skb(sdata, presp); 1458 out: 1459 rcu_read_unlock(); 1460 free: 1461 kfree(elems); 1462 } 1463 1464 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1465 struct ieee80211_mgmt *mgmt, 1466 size_t len, 1467 struct ieee80211_rx_status *rx_status) 1468 { 1469 u16 type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE; 1470 struct ieee80211_local *local = sdata->local; 1471 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1472 struct ieee802_11_elems *elems; 1473 struct ieee80211_channel *channel; 1474 size_t baselen; 1475 int freq; 1476 enum nl80211_band band = rx_status->band; 1477 1478 /* ignore ProbeResp to foreign address */ 1479 if (type == (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP) && 1480 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1481 return; 1482 1483 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1484 if (baselen > len) 1485 return; 1486 1487 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1488 len - baselen, type, NULL); 1489 if (!elems) 1490 return; 1491 1492 /* ignore non-mesh or secure / insecure mismatch */ 1493 if ((!elems->mesh_id || !elems->mesh_config) || 1494 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1495 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1496 goto free; 1497 1498 if (elems->ds_params) 1499 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1500 else 1501 freq = rx_status->freq; 1502 1503 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1504 1505 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1506 goto free; 1507 1508 if (mesh_matches_local(sdata, elems)) { 1509 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1510 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1511 if (!sdata->u.mesh.user_mpm || 1512 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1513 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1514 mesh_neighbour_update(sdata, mgmt->sa, elems, 1515 rx_status); 1516 1517 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1518 !sdata->vif.bss_conf.csa_active) 1519 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1520 } 1521 1522 if (ifmsh->sync_ops) 1523 ifmsh->sync_ops->rx_bcn_presp(sdata, 1524 type & IEEE80211_FCTL_STYPE, 1525 mgmt, len, 1526 elems->mesh_config, rx_status); 1527 free: 1528 kfree(elems); 1529 } 1530 1531 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1532 { 1533 int ret; 1534 1535 ieee80211_mesh_reset_csa(sdata); 1536 1537 ret = ieee80211_mesh_rebuild_beacon(sdata); 1538 if (ret) 1539 return -EINVAL; 1540 1541 *changed |= BSS_CHANGED_BEACON; 1542 1543 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1544 sdata->vif.bss_conf.chanreq.oper.chan->center_freq); 1545 return 0; 1546 } 1547 1548 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1549 struct cfg80211_csa_settings *csa_settings, 1550 u64 *changed) 1551 { 1552 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1553 struct mesh_csa_settings *tmp_csa_settings; 1554 int ret = 0; 1555 1556 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1557 1558 tmp_csa_settings = kmalloc_obj(*tmp_csa_settings, GFP_ATOMIC); 1559 if (!tmp_csa_settings) 1560 return -ENOMEM; 1561 1562 memcpy(&tmp_csa_settings->settings, csa_settings, 1563 sizeof(struct cfg80211_csa_settings)); 1564 1565 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1566 1567 ret = ieee80211_mesh_rebuild_beacon(sdata); 1568 if (ret) { 1569 RCU_INIT_POINTER(ifmsh->csa, NULL); 1570 kfree_rcu(tmp_csa_settings, rcu_head); 1571 return ret; 1572 } 1573 1574 *changed |= BSS_CHANGED_BEACON; 1575 return 0; 1576 } 1577 1578 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1579 struct ieee80211_mgmt *mgmt, size_t len, 1580 struct ieee802_11_elems *elems) 1581 { 1582 struct ieee80211_mgmt *mgmt_fwd; 1583 struct sk_buff *skb; 1584 struct ieee80211_local *local = sdata->local; 1585 1586 skb = dev_alloc_skb(local->tx_headroom + len); 1587 if (!skb) 1588 return -ENOMEM; 1589 skb_reserve(skb, local->tx_headroom); 1590 mgmt_fwd = skb_put(skb, len); 1591 1592 elems->mesh_chansw_params_ie->mesh_ttl--; 1593 elems->mesh_chansw_params_ie->mesh_flags &= 1594 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1595 1596 memcpy(mgmt_fwd, mgmt, len); 1597 eth_broadcast_addr(mgmt_fwd->da); 1598 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1599 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1600 1601 ieee80211_tx_skb(sdata, skb); 1602 return 0; 1603 } 1604 1605 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1606 struct ieee80211_mgmt *mgmt, size_t len) 1607 { 1608 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1609 struct ieee802_11_elems *elems; 1610 u16 pre_value; 1611 bool fwd_csa = true; 1612 size_t baselen; 1613 u8 *pos; 1614 1615 if (mgmt->u.action.action_code != WLAN_ACTION_SPCT_CHL_SWITCH) 1616 return; 1617 1618 pos = mgmt->u.action.chan_switch.variable; 1619 baselen = offsetof(struct ieee80211_mgmt, 1620 u.action.chan_switch.variable); 1621 elems = ieee802_11_parse_elems(pos, len - baselen, 1622 IEEE80211_FTYPE_MGMT | 1623 IEEE80211_STYPE_ACTION, 1624 NULL); 1625 if (!elems) 1626 return; 1627 1628 if (!mesh_matches_local(sdata, elems)) 1629 goto free; 1630 1631 if (!elems->mesh_chansw_params_ie) 1632 goto free; 1633 1634 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1635 if (!--ifmsh->chsw_ttl) 1636 fwd_csa = false; 1637 1638 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1639 if (ifmsh->pre_value >= pre_value) 1640 goto free; 1641 1642 ifmsh->pre_value = pre_value; 1643 1644 if (!sdata->vif.bss_conf.csa_active && 1645 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1646 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1647 goto free; 1648 } 1649 1650 /* forward or re-broadcast the CSA frame */ 1651 if (fwd_csa) { 1652 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1653 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1654 } 1655 free: 1656 kfree(elems); 1657 } 1658 1659 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1660 struct ieee80211_mgmt *mgmt, 1661 size_t len, 1662 struct ieee80211_rx_status *rx_status) 1663 { 1664 switch (mgmt->u.action.category) { 1665 case WLAN_CATEGORY_SELF_PROTECTED: 1666 switch (mgmt->u.action.action_code) { 1667 case WLAN_SP_MESH_PEERING_OPEN: 1668 case WLAN_SP_MESH_PEERING_CLOSE: 1669 case WLAN_SP_MESH_PEERING_CONFIRM: 1670 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1671 break; 1672 } 1673 break; 1674 case WLAN_CATEGORY_MESH_ACTION: 1675 if (mesh_action_is_path_sel(mgmt)) 1676 mesh_rx_path_sel_frame(sdata, mgmt, len); 1677 break; 1678 case WLAN_CATEGORY_SPECTRUM_MGMT: 1679 mesh_rx_csa_frame(sdata, mgmt, len); 1680 break; 1681 } 1682 } 1683 1684 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1685 struct sk_buff *skb) 1686 { 1687 struct ieee80211_rx_status *rx_status; 1688 struct ieee80211_mgmt *mgmt; 1689 u16 stype; 1690 1691 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1692 1693 /* mesh already went down */ 1694 if (!sdata->u.mesh.mesh_id_len) 1695 return; 1696 1697 rx_status = IEEE80211_SKB_RXCB(skb); 1698 mgmt = (struct ieee80211_mgmt *) skb->data; 1699 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1700 1701 switch (stype) { 1702 case IEEE80211_STYPE_PROBE_RESP: 1703 case IEEE80211_STYPE_BEACON: 1704 ieee80211_mesh_rx_bcn_presp(sdata, mgmt, skb->len, rx_status); 1705 break; 1706 case IEEE80211_STYPE_PROBE_REQ: 1707 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1708 break; 1709 case IEEE80211_STYPE_ACTION: 1710 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1711 break; 1712 } 1713 } 1714 1715 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1716 { 1717 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1718 u32 bit; 1719 u64 changed = 0; 1720 1721 for_each_set_bit(bit, ifmsh->mbss_changed, 1722 sizeof(changed) * BITS_PER_BYTE) { 1723 clear_bit(bit, ifmsh->mbss_changed); 1724 changed |= BIT(bit); 1725 } 1726 1727 if (sdata->vif.bss_conf.enable_beacon && 1728 (changed & (BSS_CHANGED_BEACON | 1729 BSS_CHANGED_HT | 1730 BSS_CHANGED_BASIC_RATES | 1731 BSS_CHANGED_BEACON_INT))) 1732 if (ieee80211_mesh_rebuild_beacon(sdata)) 1733 return; 1734 1735 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1736 } 1737 1738 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1739 { 1740 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1741 1742 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1743 1744 /* mesh already went down */ 1745 if (!sdata->u.mesh.mesh_id_len) 1746 return; 1747 1748 if (ifmsh->preq_queue_len && 1749 time_after(jiffies, 1750 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1751 mesh_path_start_discovery(sdata); 1752 1753 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1754 ieee80211_mesh_housekeeping(sdata); 1755 1756 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1757 ieee80211_mesh_rootpath(sdata); 1758 1759 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1760 mesh_sync_adjust_tsf(sdata); 1761 1762 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1763 mesh_bss_info_changed(sdata); 1764 } 1765 1766 1767 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1768 { 1769 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1770 static u8 zero_addr[ETH_ALEN] = {}; 1771 1772 timer_setup(&ifmsh->housekeeping_timer, 1773 ieee80211_mesh_housekeeping_timer, 0); 1774 1775 ifmsh->accepting_plinks = true; 1776 atomic_set(&ifmsh->mpaths, 0); 1777 mesh_rmc_init(sdata); 1778 ifmsh->last_preq = jiffies; 1779 ifmsh->next_perr = jiffies; 1780 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1781 ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 1782 /* Allocate all mesh structures when creating the first mesh interface. */ 1783 if (!mesh_allocated) 1784 ieee80211s_init(); 1785 1786 mesh_pathtbl_init(sdata); 1787 1788 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1789 timer_setup(&ifmsh->mesh_path_root_timer, 1790 ieee80211_mesh_path_root_timer, 0); 1791 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1792 skb_queue_head_init(&ifmsh->ps.bc_buf); 1793 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1794 spin_lock_init(&ifmsh->sync_offset_lock); 1795 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1796 1797 sdata->vif.bss_conf.bssid = zero_addr; 1798 } 1799 1800 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1801 { 1802 mesh_rmc_free(sdata); 1803 mesh_pathtbl_unregister(sdata); 1804 } 1805