1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008, 2009 open80211s Ltd. 4 * Copyright (C) 2018 - 2023 Intel Corporation 5 * Authors: Luis Carlos Cobo <luisca@cozybit.com> 6 * Javier Cardona <javier@cozybit.com> 7 */ 8 9 #include <linux/slab.h> 10 #include <asm/unaligned.h> 11 #include "ieee80211_i.h" 12 #include "mesh.h" 13 #include "wme.h" 14 #include "driver-ops.h" 15 16 static int mesh_allocated; 17 static struct kmem_cache *rm_cache; 18 19 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) 20 { 21 return (mgmt->u.action.u.mesh_action.action_code == 22 WLAN_MESH_ACTION_HWMP_PATH_SELECTION); 23 } 24 25 void ieee80211s_init(void) 26 { 27 mesh_allocated = 1; 28 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), 29 0, 0, NULL); 30 } 31 32 void ieee80211s_stop(void) 33 { 34 if (!mesh_allocated) 35 return; 36 kmem_cache_destroy(rm_cache); 37 } 38 39 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) 40 { 41 struct ieee80211_sub_if_data *sdata = 42 from_timer(sdata, t, u.mesh.housekeeping_timer); 43 struct ieee80211_local *local = sdata->local; 44 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 45 46 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 47 48 wiphy_work_queue(local->hw.wiphy, &sdata->work); 49 } 50 51 /** 52 * mesh_matches_local - check if the config of a mesh point matches ours 53 * 54 * @sdata: local mesh subif 55 * @ie: information elements of a management frame from the mesh peer 56 * 57 * This function checks if the mesh configuration of a mesh point matches the 58 * local mesh configuration, i.e. if both nodes belong to the same mesh network. 59 */ 60 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, 61 struct ieee802_11_elems *ie) 62 { 63 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 64 u32 basic_rates = 0; 65 struct cfg80211_chan_def sta_chan_def; 66 struct ieee80211_supported_band *sband; 67 u32 vht_cap_info = 0; 68 69 /* 70 * As support for each feature is added, check for matching 71 * - On mesh config capabilities 72 * - Power Save Support En 73 * - Sync support enabled 74 * - Sync support active 75 * - Sync support required from peer 76 * - MDA enabled 77 * - Power management control on fc 78 */ 79 if (!(ifmsh->mesh_id_len == ie->mesh_id_len && 80 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 81 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && 82 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && 83 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && 84 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && 85 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) 86 return false; 87 88 sband = ieee80211_get_sband(sdata); 89 if (!sband) 90 return false; 91 92 ieee80211_sta_get_rates(sdata, ie, sband->band, 93 &basic_rates); 94 95 if (sdata->vif.bss_conf.basic_rates != basic_rates) 96 return false; 97 98 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, 99 NL80211_CHAN_NO_HT); 100 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); 101 102 if (ie->vht_cap_elem) 103 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); 104 105 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 106 ie->vht_operation, ie->ht_operation, 107 &sta_chan_def); 108 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, ie->eht_operation, 109 &sta_chan_def); 110 111 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, 112 &sta_chan_def)) 113 return false; 114 115 return true; 116 } 117 118 /** 119 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 120 * 121 * @ie: information elements of a management frame from the mesh peer 122 */ 123 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 124 { 125 return (ie->mesh_config->meshconf_cap & 126 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 127 } 128 129 /** 130 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 131 * 132 * @sdata: mesh interface in which mesh beacons are going to be updated 133 * 134 * Returns: beacon changed flag if the beacon content changed. 135 */ 136 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 137 { 138 bool free_plinks; 139 u64 changed = 0; 140 141 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 142 * the mesh interface might be able to establish plinks with peers that 143 * are already on the table but are not on PLINK_ESTAB state. However, 144 * in general the mesh interface is not accepting peer link requests 145 * from new peers, and that must be reflected in the beacon 146 */ 147 free_plinks = mesh_plink_availables(sdata); 148 149 if (free_plinks != sdata->u.mesh.accepting_plinks) { 150 sdata->u.mesh.accepting_plinks = free_plinks; 151 changed = BSS_CHANGED_BEACON; 152 } 153 154 return changed; 155 } 156 157 /* 158 * mesh_sta_cleanup - clean up any mesh sta state 159 * 160 * @sta: mesh sta to clean up. 161 */ 162 void mesh_sta_cleanup(struct sta_info *sta) 163 { 164 struct ieee80211_sub_if_data *sdata = sta->sdata; 165 u64 changed = mesh_plink_deactivate(sta); 166 167 if (changed) 168 ieee80211_mbss_info_change_notify(sdata, changed); 169 } 170 171 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 172 { 173 int i; 174 175 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); 176 if (!sdata->u.mesh.rmc) 177 return -ENOMEM; 178 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 179 for (i = 0; i < RMC_BUCKETS; i++) 180 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 181 return 0; 182 } 183 184 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 185 { 186 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 187 struct rmc_entry *p; 188 struct hlist_node *n; 189 int i; 190 191 if (!sdata->u.mesh.rmc) 192 return; 193 194 for (i = 0; i < RMC_BUCKETS; i++) { 195 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 196 hlist_del(&p->list); 197 kmem_cache_free(rm_cache, p); 198 } 199 } 200 201 kfree(rmc); 202 sdata->u.mesh.rmc = NULL; 203 } 204 205 /** 206 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 207 * 208 * @sdata: interface 209 * @sa: source address 210 * @mesh_hdr: mesh_header 211 * 212 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 213 * 214 * Checks using the source address and the mesh sequence number if we have 215 * received this frame lately. If the frame is not in the cache, it is added to 216 * it. 217 */ 218 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 219 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 220 { 221 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 222 u32 seqnum = 0; 223 int entries = 0; 224 u8 idx; 225 struct rmc_entry *p; 226 struct hlist_node *n; 227 228 if (!rmc) 229 return -1; 230 231 /* Don't care about endianness since only match matters */ 232 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 233 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 234 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 235 ++entries; 236 if (time_after(jiffies, p->exp_time) || 237 entries == RMC_QUEUE_MAX_LEN) { 238 hlist_del(&p->list); 239 kmem_cache_free(rm_cache, p); 240 --entries; 241 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 242 return -1; 243 } 244 245 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 246 if (!p) 247 return 0; 248 249 p->seqnum = seqnum; 250 p->exp_time = jiffies + RMC_TIMEOUT; 251 memcpy(p->sa, sa, ETH_ALEN); 252 hlist_add_head(&p->list, &rmc->bucket[idx]); 253 return 0; 254 } 255 256 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 257 struct sk_buff *skb) 258 { 259 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 260 u8 *pos, neighbors; 261 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 262 bool is_connected_to_gate = ifmsh->num_gates > 0 || 263 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 264 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 265 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 266 267 if (skb_tailroom(skb) < 2 + meshconf_len) 268 return -ENOMEM; 269 270 pos = skb_put(skb, 2 + meshconf_len); 271 *pos++ = WLAN_EID_MESH_CONFIG; 272 *pos++ = meshconf_len; 273 274 /* save a pointer for quick updates in pre-tbtt */ 275 ifmsh->meshconf_offset = pos - skb->data; 276 277 /* Active path selection protocol ID */ 278 *pos++ = ifmsh->mesh_pp_id; 279 /* Active path selection metric ID */ 280 *pos++ = ifmsh->mesh_pm_id; 281 /* Congestion control mode identifier */ 282 *pos++ = ifmsh->mesh_cc_id; 283 /* Synchronization protocol identifier */ 284 *pos++ = ifmsh->mesh_sp_id; 285 /* Authentication Protocol identifier */ 286 *pos++ = ifmsh->mesh_auth_id; 287 /* Mesh Formation Info - number of neighbors */ 288 neighbors = atomic_read(&ifmsh->estab_plinks); 289 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 290 *pos++ = (is_connected_to_as << 7) | 291 (neighbors << 1) | 292 is_connected_to_gate; 293 /* Mesh capability */ 294 *pos = 0x00; 295 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 296 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 297 *pos |= ifmsh->accepting_plinks ? 298 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 299 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 300 *pos |= ifmsh->ps_peers_deep_sleep ? 301 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 302 return 0; 303 } 304 305 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 306 { 307 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 308 u8 *pos; 309 310 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 311 return -ENOMEM; 312 313 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 314 *pos++ = WLAN_EID_MESH_ID; 315 *pos++ = ifmsh->mesh_id_len; 316 if (ifmsh->mesh_id_len) 317 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 318 319 return 0; 320 } 321 322 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 323 struct sk_buff *skb) 324 { 325 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 326 u8 *pos; 327 328 /* see IEEE802.11-2012 13.14.6 */ 329 if (ifmsh->ps_peers_light_sleep == 0 && 330 ifmsh->ps_peers_deep_sleep == 0 && 331 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 332 return 0; 333 334 if (skb_tailroom(skb) < 4) 335 return -ENOMEM; 336 337 pos = skb_put(skb, 2 + 2); 338 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 339 *pos++ = 2; 340 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 341 342 return 0; 343 } 344 345 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 346 struct sk_buff *skb) 347 { 348 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 349 u8 offset, len; 350 const u8 *data; 351 352 if (!ifmsh->ie || !ifmsh->ie_len) 353 return 0; 354 355 /* fast-forward to vendor IEs */ 356 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 357 358 if (offset < ifmsh->ie_len) { 359 len = ifmsh->ie_len - offset; 360 data = ifmsh->ie + offset; 361 if (skb_tailroom(skb) < len) 362 return -ENOMEM; 363 skb_put_data(skb, data, len); 364 } 365 366 return 0; 367 } 368 369 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 370 { 371 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 372 u8 len = 0; 373 const u8 *data; 374 375 if (!ifmsh->ie || !ifmsh->ie_len) 376 return 0; 377 378 /* find RSN IE */ 379 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 380 if (!data) 381 return 0; 382 383 len = data[1] + 2; 384 385 if (skb_tailroom(skb) < len) 386 return -ENOMEM; 387 skb_put_data(skb, data, len); 388 389 return 0; 390 } 391 392 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 393 struct sk_buff *skb) 394 { 395 struct ieee80211_chanctx_conf *chanctx_conf; 396 struct ieee80211_channel *chan; 397 u8 *pos; 398 399 if (skb_tailroom(skb) < 3) 400 return -ENOMEM; 401 402 rcu_read_lock(); 403 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 404 if (WARN_ON(!chanctx_conf)) { 405 rcu_read_unlock(); 406 return -EINVAL; 407 } 408 chan = chanctx_conf->def.chan; 409 rcu_read_unlock(); 410 411 pos = skb_put(skb, 2 + 1); 412 *pos++ = WLAN_EID_DS_PARAMS; 413 *pos++ = 1; 414 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 415 416 return 0; 417 } 418 419 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 420 struct sk_buff *skb) 421 { 422 struct ieee80211_supported_band *sband; 423 u8 *pos; 424 425 sband = ieee80211_get_sband(sdata); 426 if (!sband) 427 return -EINVAL; 428 429 /* HT not allowed in 6 GHz */ 430 if (sband->band == NL80211_BAND_6GHZ) 431 return 0; 432 433 if (!sband->ht_cap.ht_supported || 434 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 435 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 436 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 437 return 0; 438 439 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 440 return -ENOMEM; 441 442 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 443 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 444 445 return 0; 446 } 447 448 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 449 struct sk_buff *skb) 450 { 451 struct ieee80211_local *local = sdata->local; 452 struct ieee80211_chanctx_conf *chanctx_conf; 453 struct ieee80211_channel *channel; 454 struct ieee80211_supported_band *sband; 455 struct ieee80211_sta_ht_cap *ht_cap; 456 u8 *pos; 457 458 rcu_read_lock(); 459 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 460 if (WARN_ON(!chanctx_conf)) { 461 rcu_read_unlock(); 462 return -EINVAL; 463 } 464 channel = chanctx_conf->def.chan; 465 rcu_read_unlock(); 466 467 sband = local->hw.wiphy->bands[channel->band]; 468 ht_cap = &sband->ht_cap; 469 470 /* HT not allowed in 6 GHz */ 471 if (sband->band == NL80211_BAND_6GHZ) 472 return 0; 473 474 if (!ht_cap->ht_supported || 475 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 476 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 477 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 478 return 0; 479 480 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 481 return -ENOMEM; 482 483 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 484 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, 485 sdata->vif.bss_conf.ht_operation_mode, 486 false); 487 488 return 0; 489 } 490 491 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 492 struct sk_buff *skb) 493 { 494 struct ieee80211_supported_band *sband; 495 u8 *pos; 496 497 sband = ieee80211_get_sband(sdata); 498 if (!sband) 499 return -EINVAL; 500 501 /* VHT not allowed in 6 GHz */ 502 if (sband->band == NL80211_BAND_6GHZ) 503 return 0; 504 505 if (!sband->vht_cap.vht_supported || 506 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 507 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 508 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 509 return 0; 510 511 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 512 return -ENOMEM; 513 514 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 515 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 516 517 return 0; 518 } 519 520 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 521 struct sk_buff *skb) 522 { 523 struct ieee80211_local *local = sdata->local; 524 struct ieee80211_chanctx_conf *chanctx_conf; 525 struct ieee80211_channel *channel; 526 struct ieee80211_supported_band *sband; 527 struct ieee80211_sta_vht_cap *vht_cap; 528 u8 *pos; 529 530 rcu_read_lock(); 531 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 532 if (WARN_ON(!chanctx_conf)) { 533 rcu_read_unlock(); 534 return -EINVAL; 535 } 536 channel = chanctx_conf->def.chan; 537 rcu_read_unlock(); 538 539 sband = local->hw.wiphy->bands[channel->band]; 540 vht_cap = &sband->vht_cap; 541 542 /* VHT not allowed in 6 GHz */ 543 if (sband->band == NL80211_BAND_6GHZ) 544 return 0; 545 546 if (!vht_cap->vht_supported || 547 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 548 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 549 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 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.chandef); 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 const struct ieee80211_sta_he_cap *he_cap; 566 struct ieee80211_supported_band *sband; 567 u8 *pos; 568 569 sband = ieee80211_get_sband(sdata); 570 if (!sband) 571 return -EINVAL; 572 573 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 574 575 if (!he_cap || 576 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 577 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 578 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 579 return 0; 580 581 if (skb_tailroom(skb) < ie_len) 582 return -ENOMEM; 583 584 pos = skb_put(skb, ie_len); 585 ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len); 586 587 return 0; 588 } 589 590 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 591 struct sk_buff *skb) 592 { 593 const struct ieee80211_sta_he_cap *he_cap; 594 struct ieee80211_supported_band *sband; 595 u32 len; 596 u8 *pos; 597 598 sband = ieee80211_get_sband(sdata); 599 if (!sband) 600 return -EINVAL; 601 602 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 603 if (!he_cap || 604 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 605 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 606 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 607 return 0; 608 609 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 610 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) 611 len += sizeof(struct ieee80211_he_6ghz_oper); 612 613 if (skb_tailroom(skb) < len) 614 return -ENOMEM; 615 616 pos = skb_put(skb, len); 617 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef); 618 619 return 0; 620 } 621 622 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 623 struct sk_buff *skb) 624 { 625 struct ieee80211_supported_band *sband; 626 const struct ieee80211_sband_iftype_data *iftd; 627 628 sband = ieee80211_get_sband(sdata); 629 if (!sband) 630 return -EINVAL; 631 632 iftd = ieee80211_get_sband_iftype_data(sband, 633 NL80211_IFTYPE_MESH_POINT); 634 /* The device doesn't support HE in mesh mode or at all */ 635 if (!iftd) 636 return 0; 637 638 ieee80211_ie_build_he_6ghz_cap(sdata, sdata->deflink.smps_mode, skb); 639 return 0; 640 } 641 642 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 643 struct sk_buff *skb, u8 ie_len) 644 { 645 const struct ieee80211_sta_he_cap *he_cap; 646 const struct ieee80211_sta_eht_cap *eht_cap; 647 struct ieee80211_supported_band *sband; 648 u8 *pos; 649 650 sband = ieee80211_get_sband(sdata); 651 if (!sband) 652 return -EINVAL; 653 654 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 655 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 656 if (!he_cap || !eht_cap || 657 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 658 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 659 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 660 return 0; 661 662 if (skb_tailroom(skb) < ie_len) 663 return -ENOMEM; 664 665 pos = skb_put(skb, ie_len); 666 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + ie_len, false); 667 668 return 0; 669 } 670 671 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 672 { 673 const struct ieee80211_sta_eht_cap *eht_cap; 674 struct ieee80211_supported_band *sband; 675 u32 len; 676 u8 *pos; 677 678 sband = ieee80211_get_sband(sdata); 679 if (!sband) 680 return -EINVAL; 681 682 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 683 if (!eht_cap || 684 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 685 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 686 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 687 return 0; 688 689 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 690 offsetof(struct ieee80211_eht_operation_info, optional); 691 692 if (skb_tailroom(skb) < len) 693 return -ENOMEM; 694 695 pos = skb_put(skb, len); 696 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chandef, eht_cap); 697 698 return 0; 699 } 700 701 static void ieee80211_mesh_path_timer(struct timer_list *t) 702 { 703 struct ieee80211_sub_if_data *sdata = 704 from_timer(sdata, t, u.mesh.mesh_path_timer); 705 706 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 707 } 708 709 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 710 { 711 struct ieee80211_sub_if_data *sdata = 712 from_timer(sdata, t, u.mesh.mesh_path_root_timer); 713 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 714 715 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 716 717 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 718 } 719 720 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 721 { 722 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 723 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 724 else { 725 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 726 /* stop running timer */ 727 del_timer_sync(&ifmsh->mesh_path_root_timer); 728 } 729 } 730 731 static void 732 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 733 u8 *ie, u8 ie_len) 734 { 735 struct ieee80211_supported_band *sband; 736 const struct element *cap; 737 const struct ieee80211_he_operation *he_oper = NULL; 738 739 sband = ieee80211_get_sband(sdata); 740 if (!sband) 741 return; 742 743 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 744 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || 745 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || 746 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) 747 return; 748 749 sdata->vif.bss_conf.he_support = true; 750 751 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 752 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 753 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 754 he_oper = (void *)(cap->data + 1); 755 756 if (he_oper) 757 sdata->vif.bss_conf.he_oper.params = 758 __le32_to_cpu(he_oper->he_oper_params); 759 760 sdata->vif.bss_conf.eht_support = 761 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 762 } 763 764 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 765 struct sk_buff *skb, u32 ctrl_flags) 766 { 767 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 768 struct ieee80211_mesh_fast_tx_key key = { 769 .type = MESH_FAST_TX_TYPE_LOCAL 770 }; 771 struct ieee80211_mesh_fast_tx *entry; 772 struct ieee80211s_hdr *meshhdr; 773 u8 sa[ETH_ALEN] __aligned(2); 774 struct tid_ampdu_tx *tid_tx; 775 struct sta_info *sta; 776 bool copy_sa = false; 777 u16 ethertype; 778 u8 tid; 779 780 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 781 return false; 782 783 if (ifmsh->mshcfg.dot11MeshNolearn) 784 return false; 785 786 /* Add support for these cases later */ 787 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 788 return false; 789 790 if (is_multicast_ether_addr(skb->data)) 791 return false; 792 793 ethertype = (skb->data[12] << 8) | skb->data[13]; 794 if (ethertype < ETH_P_802_3_MIN) 795 return false; 796 797 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) 798 return false; 799 800 if (skb->ip_summed == CHECKSUM_PARTIAL) { 801 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 802 if (skb_checksum_help(skb)) 803 return false; 804 } 805 806 ether_addr_copy(key.addr, skb->data); 807 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr)) 808 key.type = MESH_FAST_TX_TYPE_PROXIED; 809 entry = mesh_fast_tx_get(sdata, &key); 810 if (!entry) 811 return false; 812 813 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 814 return false; 815 816 sta = rcu_dereference(entry->mpath->next_hop); 817 if (!sta) 818 return false; 819 820 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 821 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 822 if (tid_tx) { 823 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 824 return false; 825 if (tid_tx->timeout) 826 tid_tx->last_tx = jiffies; 827 } 828 829 skb = skb_share_check(skb, GFP_ATOMIC); 830 if (!skb) 831 return true; 832 833 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 834 835 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 836 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 837 /* preserve SA from eth header for 6-addr frames */ 838 ether_addr_copy(sa, skb->data + ETH_ALEN); 839 copy_sa = true; 840 } 841 842 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 843 entry->hdrlen); 844 845 meshhdr = (struct ieee80211s_hdr *)skb->data; 846 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 847 &meshhdr->seqnum); 848 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 849 if (copy_sa) 850 ether_addr_copy(meshhdr->eaddr2, sa); 851 852 skb_push(skb, 2 * ETH_ALEN); 853 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 854 entry->mpath->dst, sdata->vif.addr); 855 856 return true; 857 } 858 859 /** 860 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 861 * @hdr: 802.11 frame header 862 * @fc: frame control field 863 * @meshda: destination address in the mesh 864 * @meshsa: source address in the mesh. Same as TA, as frame is 865 * locally originated. 866 * 867 * Return the length of the 802.11 (does not include a mesh control header) 868 */ 869 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 870 const u8 *meshda, const u8 *meshsa) 871 { 872 if (is_multicast_ether_addr(meshda)) { 873 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 874 /* DA TA SA */ 875 memcpy(hdr->addr1, meshda, ETH_ALEN); 876 memcpy(hdr->addr2, meshsa, ETH_ALEN); 877 memcpy(hdr->addr3, meshsa, ETH_ALEN); 878 return 24; 879 } else { 880 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 881 /* RA TA DA SA */ 882 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 883 memcpy(hdr->addr2, meshsa, ETH_ALEN); 884 memcpy(hdr->addr3, meshda, ETH_ALEN); 885 memcpy(hdr->addr4, meshsa, ETH_ALEN); 886 return 30; 887 } 888 } 889 890 /** 891 * ieee80211_new_mesh_header - create a new mesh header 892 * @sdata: mesh interface to be used 893 * @meshhdr: uninitialized mesh header 894 * @addr4or5: 1st address in the ae header, which may correspond to address 4 895 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 896 * be NULL. 897 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 898 * mesh frame 899 * 900 * Return the header length. 901 */ 902 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 903 struct ieee80211s_hdr *meshhdr, 904 const char *addr4or5, const char *addr6) 905 { 906 if (WARN_ON(!addr4or5 && addr6)) 907 return 0; 908 909 memset(meshhdr, 0, sizeof(*meshhdr)); 910 911 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 912 913 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 914 &meshhdr->seqnum); 915 if (addr4or5 && !addr6) { 916 meshhdr->flags |= MESH_FLAGS_AE_A4; 917 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 918 return 2 * ETH_ALEN; 919 } else if (addr4or5 && addr6) { 920 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 921 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 922 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 923 return 3 * ETH_ALEN; 924 } 925 926 return ETH_ALEN; 927 } 928 929 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 930 { 931 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 932 u64 changed; 933 934 if (ifmsh->mshcfg.plink_timeout > 0) 935 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 936 mesh_path_expire(sdata); 937 938 changed = mesh_accept_plinks_update(sdata); 939 ieee80211_mbss_info_change_notify(sdata, changed); 940 941 mesh_fast_tx_gc(sdata); 942 943 mod_timer(&ifmsh->housekeeping_timer, 944 round_jiffies(jiffies + 945 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 946 } 947 948 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 949 { 950 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 951 u32 interval; 952 953 mesh_path_tx_root_frame(sdata); 954 955 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 956 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 957 else 958 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 959 960 mod_timer(&ifmsh->mesh_path_root_timer, 961 round_jiffies(TU_TO_EXP_TIME(interval))); 962 } 963 964 static int 965 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 966 { 967 struct beacon_data *bcn; 968 int head_len, tail_len; 969 struct sk_buff *skb; 970 struct ieee80211_mgmt *mgmt; 971 struct ieee80211_chanctx_conf *chanctx_conf; 972 struct mesh_csa_settings *csa; 973 enum nl80211_band band; 974 u8 ie_len_he_cap, ie_len_eht_cap; 975 u8 *pos; 976 struct ieee80211_sub_if_data *sdata; 977 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 978 979 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 980 rcu_read_lock(); 981 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 982 band = chanctx_conf->def.chan->band; 983 rcu_read_unlock(); 984 985 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata, 986 NL80211_IFTYPE_MESH_POINT); 987 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata, 988 NL80211_IFTYPE_MESH_POINT); 989 head_len = hdr_len + 990 2 + /* NULL SSID */ 991 /* Channel Switch Announcement */ 992 2 + sizeof(struct ieee80211_channel_sw_ie) + 993 /* Mesh Channel Switch Parameters */ 994 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 995 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 996 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 997 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 998 2 + 8 + /* supported rates */ 999 2 + 3; /* DS params */ 1000 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 1001 2 + sizeof(struct ieee80211_ht_cap) + 1002 2 + sizeof(struct ieee80211_ht_operation) + 1003 2 + ifmsh->mesh_id_len + 1004 2 + sizeof(struct ieee80211_meshconf_ie) + 1005 2 + sizeof(__le16) + /* awake window */ 1006 2 + sizeof(struct ieee80211_vht_cap) + 1007 2 + sizeof(struct ieee80211_vht_operation) + 1008 ie_len_he_cap + 1009 2 + 1 + sizeof(struct ieee80211_he_operation) + 1010 sizeof(struct ieee80211_he_6ghz_oper) + 1011 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 1012 ie_len_eht_cap + 1013 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 1014 offsetof(struct ieee80211_eht_operation_info, optional) + 1015 ifmsh->ie_len; 1016 1017 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 1018 /* need an skb for IE builders to operate on */ 1019 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 1020 1021 if (!bcn || !skb) 1022 goto out_free; 1023 1024 /* 1025 * pointers go into the block we allocated, 1026 * memory is | beacon_data | head | tail | 1027 */ 1028 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1029 1030 /* fill in the head */ 1031 mgmt = skb_put_zero(skb, hdr_len); 1032 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1033 IEEE80211_STYPE_BEACON); 1034 eth_broadcast_addr(mgmt->da); 1035 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1036 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1037 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1038 mgmt->u.beacon.beacon_int = 1039 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1040 mgmt->u.beacon.capab_info |= cpu_to_le16( 1041 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1042 1043 pos = skb_put(skb, 2); 1044 *pos++ = WLAN_EID_SSID; 1045 *pos++ = 0x0; 1046 1047 rcu_read_lock(); 1048 csa = rcu_dereference(ifmsh->csa); 1049 if (csa) { 1050 enum nl80211_channel_type ct; 1051 struct cfg80211_chan_def *chandef; 1052 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1053 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1054 1055 pos = skb_put_zero(skb, ie_len); 1056 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1057 *pos++ = 3; 1058 *pos++ = 0x0; 1059 *pos++ = ieee80211_frequency_to_channel( 1060 csa->settings.chandef.chan->center_freq); 1061 bcn->cntdwn_current_counter = csa->settings.count; 1062 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1063 *pos++ = csa->settings.count; 1064 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1065 *pos++ = 6; 1066 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1067 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1068 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1069 } else { 1070 *pos++ = ifmsh->chsw_ttl; 1071 } 1072 *pos++ |= csa->settings.block_tx ? 1073 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1074 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1075 pos += 2; 1076 put_unaligned_le16(ifmsh->pre_value, pos); 1077 pos += 2; 1078 1079 switch (csa->settings.chandef.width) { 1080 case NL80211_CHAN_WIDTH_40: 1081 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1082 pos = skb_put_zero(skb, ie_len); 1083 1084 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1085 *pos++ = 1; /* len */ 1086 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1087 if (ct == NL80211_CHAN_HT40PLUS) 1088 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1089 else 1090 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1091 break; 1092 case NL80211_CHAN_WIDTH_80: 1093 case NL80211_CHAN_WIDTH_80P80: 1094 case NL80211_CHAN_WIDTH_160: 1095 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1096 ie_len = 2 + 2 + 1097 sizeof(struct ieee80211_wide_bw_chansw_ie); 1098 pos = skb_put_zero(skb, ie_len); 1099 1100 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1101 *pos++ = 5; /* len */ 1102 /* put sub IE */ 1103 chandef = &csa->settings.chandef; 1104 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1105 break; 1106 default: 1107 break; 1108 } 1109 } 1110 rcu_read_unlock(); 1111 1112 if (ieee80211_add_srates_ie(sdata, skb, true, band) || 1113 mesh_add_ds_params_ie(sdata, skb)) 1114 goto out_free; 1115 1116 bcn->head_len = skb->len; 1117 memcpy(bcn->head, skb->data, bcn->head_len); 1118 1119 /* now the tail */ 1120 skb_trim(skb, 0); 1121 bcn->tail = bcn->head + bcn->head_len; 1122 1123 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || 1124 mesh_add_rsn_ie(sdata, skb) || 1125 mesh_add_ht_cap_ie(sdata, skb) || 1126 mesh_add_ht_oper_ie(sdata, skb) || 1127 mesh_add_meshid_ie(sdata, skb) || 1128 mesh_add_meshconf_ie(sdata, skb) || 1129 mesh_add_awake_window_ie(sdata, skb) || 1130 mesh_add_vht_cap_ie(sdata, skb) || 1131 mesh_add_vht_oper_ie(sdata, skb) || 1132 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1133 mesh_add_he_oper_ie(sdata, skb) || 1134 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1135 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1136 mesh_add_eht_oper_ie(sdata, skb) || 1137 mesh_add_vendor_ies(sdata, skb)) 1138 goto out_free; 1139 1140 bcn->tail_len = skb->len; 1141 memcpy(bcn->tail, skb->data, bcn->tail_len); 1142 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1143 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1144 (bcn->tail + ifmsh->meshconf_offset); 1145 1146 dev_kfree_skb(skb); 1147 rcu_assign_pointer(ifmsh->beacon, bcn); 1148 return 0; 1149 out_free: 1150 kfree(bcn); 1151 dev_kfree_skb(skb); 1152 return -ENOMEM; 1153 } 1154 1155 static int 1156 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1157 { 1158 struct beacon_data *old_bcn; 1159 int ret; 1160 1161 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1162 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1163 if (ret) 1164 /* just reuse old beacon */ 1165 return ret; 1166 1167 if (old_bcn) 1168 kfree_rcu(old_bcn, rcu_head); 1169 return 0; 1170 } 1171 1172 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1173 u64 changed) 1174 { 1175 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1176 unsigned long bits = changed; 1177 u32 bit; 1178 1179 if (!bits) 1180 return; 1181 1182 /* if we race with running work, worst case this work becomes a noop */ 1183 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) 1184 set_bit(bit, ifmsh->mbss_changed); 1185 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1186 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1187 } 1188 1189 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1190 { 1191 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1192 struct ieee80211_local *local = sdata->local; 1193 u64 changed = BSS_CHANGED_BEACON | 1194 BSS_CHANGED_BEACON_ENABLED | 1195 BSS_CHANGED_HT | 1196 BSS_CHANGED_BASIC_RATES | 1197 BSS_CHANGED_BEACON_INT | 1198 BSS_CHANGED_MCAST_RATE; 1199 1200 local->fif_other_bss++; 1201 /* mesh ifaces must set allmulti to forward mcast traffic */ 1202 atomic_inc(&local->iff_allmultis); 1203 ieee80211_configure_filter(local); 1204 1205 ifmsh->mesh_cc_id = 0; /* Disabled */ 1206 /* register sync ops from extensible synchronization framework */ 1207 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1208 ifmsh->sync_offset_clockdrift_max = 0; 1209 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1210 ieee80211_mesh_root_setup(ifmsh); 1211 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1212 sdata->vif.bss_conf.ht_operation_mode = 1213 ifmsh->mshcfg.ht_opmode; 1214 sdata->vif.bss_conf.enable_beacon = true; 1215 1216 changed |= ieee80211_mps_local_status_update(sdata); 1217 1218 if (ieee80211_mesh_build_beacon(ifmsh)) { 1219 ieee80211_stop_mesh(sdata); 1220 return -ENOMEM; 1221 } 1222 1223 ieee80211_recalc_dtim(local, sdata); 1224 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1225 1226 netif_carrier_on(sdata->dev); 1227 return 0; 1228 } 1229 1230 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1231 { 1232 struct ieee80211_local *local = sdata->local; 1233 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1234 struct beacon_data *bcn; 1235 1236 netif_carrier_off(sdata->dev); 1237 1238 /* flush STAs and mpaths on this iface */ 1239 sta_info_flush(sdata); 1240 ieee80211_free_keys(sdata, true); 1241 mesh_path_flush_by_iface(sdata); 1242 1243 /* stop the beacon */ 1244 ifmsh->mesh_id_len = 0; 1245 sdata->vif.bss_conf.enable_beacon = false; 1246 sdata->beacon_rate_set = false; 1247 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1248 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1249 BSS_CHANGED_BEACON_ENABLED); 1250 1251 /* remove beacon */ 1252 bcn = sdata_dereference(ifmsh->beacon, sdata); 1253 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1254 kfree_rcu(bcn, rcu_head); 1255 1256 /* free all potentially still buffered group-addressed frames */ 1257 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1258 skb_queue_purge(&ifmsh->ps.bc_buf); 1259 1260 del_timer_sync(&sdata->u.mesh.housekeeping_timer); 1261 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); 1262 del_timer_sync(&sdata->u.mesh.mesh_path_timer); 1263 1264 /* clear any mesh work (for next join) we may have accrued */ 1265 ifmsh->wrkq_flags = 0; 1266 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1267 1268 local->fif_other_bss--; 1269 atomic_dec(&local->iff_allmultis); 1270 ieee80211_configure_filter(local); 1271 } 1272 1273 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1274 { 1275 int err; 1276 1277 /* if the current channel is a DFS channel, mark the channel as 1278 * unavailable. 1279 */ 1280 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1281 &sdata->vif.bss_conf.chandef, 1282 NL80211_IFTYPE_MESH_POINT); 1283 if (err > 0) 1284 cfg80211_radar_event(sdata->local->hw.wiphy, 1285 &sdata->vif.bss_conf.chandef, GFP_ATOMIC); 1286 } 1287 1288 static bool 1289 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1290 struct ieee802_11_elems *elems, bool beacon) 1291 { 1292 struct cfg80211_csa_settings params; 1293 struct ieee80211_csa_ie csa_ie; 1294 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1295 struct ieee80211_supported_band *sband; 1296 int err; 1297 ieee80211_conn_flags_t conn_flags = 0; 1298 u32 vht_cap_info = 0; 1299 1300 sdata_assert_lock(sdata); 1301 1302 sband = ieee80211_get_sband(sdata); 1303 if (!sband) 1304 return false; 1305 1306 switch (sdata->vif.bss_conf.chandef.width) { 1307 case NL80211_CHAN_WIDTH_20_NOHT: 1308 conn_flags |= IEEE80211_CONN_DISABLE_HT; 1309 fallthrough; 1310 case NL80211_CHAN_WIDTH_20: 1311 conn_flags |= IEEE80211_CONN_DISABLE_40MHZ; 1312 fallthrough; 1313 case NL80211_CHAN_WIDTH_40: 1314 conn_flags |= IEEE80211_CONN_DISABLE_VHT; 1315 break; 1316 default: 1317 break; 1318 } 1319 1320 if (elems->vht_cap_elem) 1321 vht_cap_info = 1322 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1323 1324 memset(¶ms, 0, sizeof(params)); 1325 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1326 vht_cap_info, 1327 conn_flags, sdata->vif.addr, 1328 &csa_ie); 1329 if (err < 0) 1330 return false; 1331 if (err) 1332 return false; 1333 1334 /* Mark the channel unavailable if the reason for the switch is 1335 * regulatory. 1336 */ 1337 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1338 ieee80211_mesh_csa_mark_radar(sdata); 1339 1340 params.chandef = csa_ie.chandef; 1341 params.count = csa_ie.count; 1342 1343 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1344 IEEE80211_CHAN_DISABLED) || 1345 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1346 NL80211_IFTYPE_MESH_POINT)) { 1347 sdata_info(sdata, 1348 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1349 sdata->vif.addr, 1350 params.chandef.chan->center_freq, 1351 params.chandef.width, 1352 params.chandef.center_freq1, 1353 params.chandef.center_freq2); 1354 return false; 1355 } 1356 1357 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1358 ¶ms.chandef, 1359 NL80211_IFTYPE_MESH_POINT); 1360 if (err < 0) 1361 return false; 1362 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1363 sdata_info(sdata, 1364 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1365 sdata->vif.addr, 1366 params.chandef.chan->center_freq, 1367 params.chandef.width, 1368 params.chandef.center_freq1, 1369 params.chandef.center_freq2); 1370 return false; 1371 } 1372 1373 params.radar_required = err; 1374 1375 if (cfg80211_chandef_identical(¶ms.chandef, 1376 &sdata->vif.bss_conf.chandef)) { 1377 mcsa_dbg(sdata, 1378 "received csa with an identical chandef, ignoring\n"); 1379 return true; 1380 } 1381 1382 mcsa_dbg(sdata, 1383 "received channel switch announcement to go to channel %d MHz\n", 1384 params.chandef.chan->center_freq); 1385 1386 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1387 if (beacon) { 1388 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1389 if (ifmsh->pre_value >= csa_ie.pre_value) 1390 return false; 1391 ifmsh->pre_value = csa_ie.pre_value; 1392 } 1393 1394 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1395 return false; 1396 1397 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1398 1399 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1400 ¶ms) < 0) 1401 return false; 1402 1403 return true; 1404 } 1405 1406 static void 1407 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1408 struct ieee80211_mgmt *mgmt, size_t len) 1409 { 1410 struct ieee80211_local *local = sdata->local; 1411 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1412 struct sk_buff *presp; 1413 struct beacon_data *bcn; 1414 struct ieee80211_mgmt *hdr; 1415 struct ieee802_11_elems *elems; 1416 size_t baselen; 1417 u8 *pos; 1418 1419 pos = mgmt->u.probe_req.variable; 1420 baselen = (u8 *) pos - (u8 *) mgmt; 1421 if (baselen > len) 1422 return; 1423 1424 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL); 1425 if (!elems) 1426 return; 1427 1428 if (!elems->mesh_id) 1429 goto free; 1430 1431 /* 802.11-2012 10.1.4.3.2 */ 1432 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1433 !is_broadcast_ether_addr(mgmt->da)) || 1434 elems->ssid_len != 0) 1435 goto free; 1436 1437 if (elems->mesh_id_len != 0 && 1438 (elems->mesh_id_len != ifmsh->mesh_id_len || 1439 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1440 goto free; 1441 1442 rcu_read_lock(); 1443 bcn = rcu_dereference(ifmsh->beacon); 1444 1445 if (!bcn) 1446 goto out; 1447 1448 presp = dev_alloc_skb(local->tx_headroom + 1449 bcn->head_len + bcn->tail_len); 1450 if (!presp) 1451 goto out; 1452 1453 skb_reserve(presp, local->tx_headroom); 1454 skb_put_data(presp, bcn->head, bcn->head_len); 1455 skb_put_data(presp, bcn->tail, bcn->tail_len); 1456 hdr = (struct ieee80211_mgmt *) presp->data; 1457 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1458 IEEE80211_STYPE_PROBE_RESP); 1459 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1460 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1461 ieee80211_tx_skb(sdata, presp); 1462 out: 1463 rcu_read_unlock(); 1464 free: 1465 kfree(elems); 1466 } 1467 1468 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1469 u16 stype, 1470 struct ieee80211_mgmt *mgmt, 1471 size_t len, 1472 struct ieee80211_rx_status *rx_status) 1473 { 1474 struct ieee80211_local *local = sdata->local; 1475 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1476 struct ieee802_11_elems *elems; 1477 struct ieee80211_channel *channel; 1478 size_t baselen; 1479 int freq; 1480 enum nl80211_band band = rx_status->band; 1481 1482 /* ignore ProbeResp to foreign address */ 1483 if (stype == IEEE80211_STYPE_PROBE_RESP && 1484 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1485 return; 1486 1487 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1488 if (baselen > len) 1489 return; 1490 1491 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1492 len - baselen, 1493 false, NULL); 1494 if (!elems) 1495 return; 1496 1497 /* ignore non-mesh or secure / unsecure mismatch */ 1498 if ((!elems->mesh_id || !elems->mesh_config) || 1499 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1500 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1501 goto free; 1502 1503 if (elems->ds_params) 1504 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1505 else 1506 freq = rx_status->freq; 1507 1508 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1509 1510 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1511 goto free; 1512 1513 if (mesh_matches_local(sdata, elems)) { 1514 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1515 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1516 if (!sdata->u.mesh.user_mpm || 1517 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1518 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1519 mesh_neighbour_update(sdata, mgmt->sa, elems, 1520 rx_status); 1521 1522 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1523 !sdata->vif.bss_conf.csa_active) 1524 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1525 } 1526 1527 if (ifmsh->sync_ops) 1528 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, 1529 elems->mesh_config, rx_status); 1530 free: 1531 kfree(elems); 1532 } 1533 1534 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1535 { 1536 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1537 struct mesh_csa_settings *tmp_csa_settings; 1538 int ret = 0; 1539 1540 /* Reset the TTL value and Initiator flag */ 1541 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1542 ifmsh->chsw_ttl = 0; 1543 1544 /* Remove the CSA and MCSP elements from the beacon */ 1545 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1546 RCU_INIT_POINTER(ifmsh->csa, NULL); 1547 if (tmp_csa_settings) 1548 kfree_rcu(tmp_csa_settings, rcu_head); 1549 ret = ieee80211_mesh_rebuild_beacon(sdata); 1550 if (ret) 1551 return -EINVAL; 1552 1553 *changed |= BSS_CHANGED_BEACON; 1554 1555 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1556 sdata->vif.bss_conf.chandef.chan->center_freq); 1557 return 0; 1558 } 1559 1560 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1561 struct cfg80211_csa_settings *csa_settings, 1562 u64 *changed) 1563 { 1564 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1565 struct mesh_csa_settings *tmp_csa_settings; 1566 int ret = 0; 1567 1568 lockdep_assert_held(&sdata->wdev.mtx); 1569 1570 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), 1571 GFP_ATOMIC); 1572 if (!tmp_csa_settings) 1573 return -ENOMEM; 1574 1575 memcpy(&tmp_csa_settings->settings, csa_settings, 1576 sizeof(struct cfg80211_csa_settings)); 1577 1578 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1579 1580 ret = ieee80211_mesh_rebuild_beacon(sdata); 1581 if (ret) { 1582 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1583 RCU_INIT_POINTER(ifmsh->csa, NULL); 1584 kfree_rcu(tmp_csa_settings, rcu_head); 1585 return ret; 1586 } 1587 1588 *changed |= BSS_CHANGED_BEACON; 1589 return 0; 1590 } 1591 1592 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1593 struct ieee80211_mgmt *mgmt, size_t len, 1594 struct ieee802_11_elems *elems) 1595 { 1596 struct ieee80211_mgmt *mgmt_fwd; 1597 struct sk_buff *skb; 1598 struct ieee80211_local *local = sdata->local; 1599 1600 skb = dev_alloc_skb(local->tx_headroom + len); 1601 if (!skb) 1602 return -ENOMEM; 1603 skb_reserve(skb, local->tx_headroom); 1604 mgmt_fwd = skb_put(skb, len); 1605 1606 elems->mesh_chansw_params_ie->mesh_ttl--; 1607 elems->mesh_chansw_params_ie->mesh_flags &= 1608 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1609 1610 memcpy(mgmt_fwd, mgmt, len); 1611 eth_broadcast_addr(mgmt_fwd->da); 1612 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1613 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1614 1615 ieee80211_tx_skb(sdata, skb); 1616 return 0; 1617 } 1618 1619 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1620 struct ieee80211_mgmt *mgmt, size_t len) 1621 { 1622 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1623 struct ieee802_11_elems *elems; 1624 u16 pre_value; 1625 bool fwd_csa = true; 1626 size_t baselen; 1627 u8 *pos; 1628 1629 if (mgmt->u.action.u.measurement.action_code != 1630 WLAN_ACTION_SPCT_CHL_SWITCH) 1631 return; 1632 1633 pos = mgmt->u.action.u.chan_switch.variable; 1634 baselen = offsetof(struct ieee80211_mgmt, 1635 u.action.u.chan_switch.variable); 1636 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL); 1637 if (!elems) 1638 return; 1639 1640 if (!mesh_matches_local(sdata, elems)) 1641 goto free; 1642 1643 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1644 if (!--ifmsh->chsw_ttl) 1645 fwd_csa = false; 1646 1647 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1648 if (ifmsh->pre_value >= pre_value) 1649 goto free; 1650 1651 ifmsh->pre_value = pre_value; 1652 1653 if (!sdata->vif.bss_conf.csa_active && 1654 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1655 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1656 goto free; 1657 } 1658 1659 /* forward or re-broadcast the CSA frame */ 1660 if (fwd_csa) { 1661 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1662 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1663 } 1664 free: 1665 kfree(elems); 1666 } 1667 1668 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1669 struct ieee80211_mgmt *mgmt, 1670 size_t len, 1671 struct ieee80211_rx_status *rx_status) 1672 { 1673 switch (mgmt->u.action.category) { 1674 case WLAN_CATEGORY_SELF_PROTECTED: 1675 switch (mgmt->u.action.u.self_prot.action_code) { 1676 case WLAN_SP_MESH_PEERING_OPEN: 1677 case WLAN_SP_MESH_PEERING_CLOSE: 1678 case WLAN_SP_MESH_PEERING_CONFIRM: 1679 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1680 break; 1681 } 1682 break; 1683 case WLAN_CATEGORY_MESH_ACTION: 1684 if (mesh_action_is_path_sel(mgmt)) 1685 mesh_rx_path_sel_frame(sdata, mgmt, len); 1686 break; 1687 case WLAN_CATEGORY_SPECTRUM_MGMT: 1688 mesh_rx_csa_frame(sdata, mgmt, len); 1689 break; 1690 } 1691 } 1692 1693 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1694 struct sk_buff *skb) 1695 { 1696 struct ieee80211_rx_status *rx_status; 1697 struct ieee80211_mgmt *mgmt; 1698 u16 stype; 1699 1700 sdata_lock(sdata); 1701 1702 /* mesh already went down */ 1703 if (!sdata->u.mesh.mesh_id_len) 1704 goto out; 1705 1706 rx_status = IEEE80211_SKB_RXCB(skb); 1707 mgmt = (struct ieee80211_mgmt *) skb->data; 1708 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1709 1710 switch (stype) { 1711 case IEEE80211_STYPE_PROBE_RESP: 1712 case IEEE80211_STYPE_BEACON: 1713 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, 1714 rx_status); 1715 break; 1716 case IEEE80211_STYPE_PROBE_REQ: 1717 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1718 break; 1719 case IEEE80211_STYPE_ACTION: 1720 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1721 break; 1722 } 1723 out: 1724 sdata_unlock(sdata); 1725 } 1726 1727 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1728 { 1729 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1730 u32 bit; 1731 u64 changed = 0; 1732 1733 for_each_set_bit(bit, ifmsh->mbss_changed, 1734 sizeof(changed) * BITS_PER_BYTE) { 1735 clear_bit(bit, ifmsh->mbss_changed); 1736 changed |= BIT(bit); 1737 } 1738 1739 if (sdata->vif.bss_conf.enable_beacon && 1740 (changed & (BSS_CHANGED_BEACON | 1741 BSS_CHANGED_HT | 1742 BSS_CHANGED_BASIC_RATES | 1743 BSS_CHANGED_BEACON_INT))) 1744 if (ieee80211_mesh_rebuild_beacon(sdata)) 1745 return; 1746 1747 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1748 } 1749 1750 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1751 { 1752 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1753 1754 sdata_lock(sdata); 1755 1756 /* mesh already went down */ 1757 if (!sdata->u.mesh.mesh_id_len) 1758 goto out; 1759 1760 if (ifmsh->preq_queue_len && 1761 time_after(jiffies, 1762 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1763 mesh_path_start_discovery(sdata); 1764 1765 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1766 ieee80211_mesh_housekeeping(sdata); 1767 1768 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1769 ieee80211_mesh_rootpath(sdata); 1770 1771 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1772 mesh_sync_adjust_tsf(sdata); 1773 1774 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1775 mesh_bss_info_changed(sdata); 1776 out: 1777 sdata_unlock(sdata); 1778 } 1779 1780 1781 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1782 { 1783 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1784 static u8 zero_addr[ETH_ALEN] = {}; 1785 1786 timer_setup(&ifmsh->housekeeping_timer, 1787 ieee80211_mesh_housekeeping_timer, 0); 1788 1789 ifmsh->accepting_plinks = true; 1790 atomic_set(&ifmsh->mpaths, 0); 1791 mesh_rmc_init(sdata); 1792 ifmsh->last_preq = jiffies; 1793 ifmsh->next_perr = jiffies; 1794 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1795 /* Allocate all mesh structures when creating the first mesh interface. */ 1796 if (!mesh_allocated) 1797 ieee80211s_init(); 1798 1799 mesh_pathtbl_init(sdata); 1800 1801 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1802 timer_setup(&ifmsh->mesh_path_root_timer, 1803 ieee80211_mesh_path_root_timer, 0); 1804 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1805 skb_queue_head_init(&ifmsh->ps.bc_buf); 1806 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1807 spin_lock_init(&ifmsh->sync_offset_lock); 1808 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1809 1810 sdata->vif.bss_conf.bssid = zero_addr; 1811 } 1812 1813 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1814 { 1815 mesh_rmc_free(sdata); 1816 mesh_pathtbl_unregister(sdata); 1817 } 1818