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 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 444 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 445 return 0; 446 447 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 448 return -ENOMEM; 449 450 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 451 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 452 453 return 0; 454 } 455 456 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 457 struct sk_buff *skb) 458 { 459 struct ieee80211_local *local = sdata->local; 460 struct ieee80211_chanctx_conf *chanctx_conf; 461 struct ieee80211_channel *channel; 462 struct ieee80211_supported_band *sband; 463 struct ieee80211_sta_ht_cap *ht_cap; 464 u8 *pos; 465 466 rcu_read_lock(); 467 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 468 if (WARN_ON(!chanctx_conf)) { 469 rcu_read_unlock(); 470 return -EINVAL; 471 } 472 channel = chanctx_conf->def.chan; 473 rcu_read_unlock(); 474 475 sband = local->hw.wiphy->bands[channel->band]; 476 ht_cap = &sband->ht_cap; 477 478 /* HT not allowed in 6 GHz */ 479 if (sband->band == NL80211_BAND_6GHZ) 480 return 0; 481 482 if (!ht_cap->ht_supported || 483 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 484 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 485 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 486 return 0; 487 488 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 489 return -ENOMEM; 490 491 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 492 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chanreq.oper, 493 sdata->vif.bss_conf.ht_operation_mode, 494 false); 495 496 return 0; 497 } 498 499 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 500 struct sk_buff *skb) 501 { 502 struct ieee80211_supported_band *sband; 503 u8 *pos; 504 505 sband = ieee80211_get_sband(sdata); 506 if (!sband) 507 return -EINVAL; 508 509 /* VHT not allowed in 6 GHz */ 510 if (sband->band == NL80211_BAND_6GHZ) 511 return 0; 512 513 if (!sband->vht_cap.vht_supported || 514 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 515 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 516 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 517 return 0; 518 519 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 520 return -ENOMEM; 521 522 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 523 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 524 525 return 0; 526 } 527 528 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 529 struct sk_buff *skb) 530 { 531 struct ieee80211_local *local = sdata->local; 532 struct ieee80211_chanctx_conf *chanctx_conf; 533 struct ieee80211_channel *channel; 534 struct ieee80211_supported_band *sband; 535 struct ieee80211_sta_vht_cap *vht_cap; 536 u8 *pos; 537 538 rcu_read_lock(); 539 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 540 if (WARN_ON(!chanctx_conf)) { 541 rcu_read_unlock(); 542 return -EINVAL; 543 } 544 channel = chanctx_conf->def.chan; 545 rcu_read_unlock(); 546 547 sband = local->hw.wiphy->bands[channel->band]; 548 vht_cap = &sband->vht_cap; 549 550 /* VHT not allowed in 6 GHz */ 551 if (sband->band == NL80211_BAND_6GHZ) 552 return 0; 553 554 if (!vht_cap->vht_supported || 555 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 556 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 557 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 558 return 0; 559 560 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 561 return -ENOMEM; 562 563 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 564 ieee80211_ie_build_vht_oper(pos, vht_cap, 565 &sdata->vif.bss_conf.chanreq.oper); 566 567 return 0; 568 } 569 570 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 571 struct sk_buff *skb, u8 ie_len) 572 { 573 struct ieee80211_supported_band *sband; 574 575 sband = ieee80211_get_sband(sdata); 576 if (!sband) 577 return -EINVAL; 578 579 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 580 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 581 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 582 return 0; 583 584 return ieee80211_put_he_cap(skb, sdata, sband, NULL); 585 } 586 587 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 588 struct sk_buff *skb) 589 { 590 const struct ieee80211_sta_he_cap *he_cap; 591 struct ieee80211_supported_band *sband; 592 u32 len; 593 u8 *pos; 594 595 sband = ieee80211_get_sband(sdata); 596 if (!sband) 597 return -EINVAL; 598 599 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 600 if (!he_cap || 601 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 602 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 603 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 604 return 0; 605 606 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 607 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ) 608 len += sizeof(struct ieee80211_he_6ghz_oper); 609 610 if (skb_tailroom(skb) < len) 611 return -ENOMEM; 612 613 pos = skb_put(skb, len); 614 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper); 615 616 return 0; 617 } 618 619 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 620 struct sk_buff *skb) 621 { 622 struct ieee80211_supported_band *sband; 623 const struct ieee80211_sband_iftype_data *iftd; 624 625 sband = ieee80211_get_sband(sdata); 626 if (!sband) 627 return -EINVAL; 628 629 if (sband->band != NL80211_BAND_6GHZ) 630 return 0; 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_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode); 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 struct ieee80211_supported_band *sband; 646 647 sband = ieee80211_get_sband(sdata); 648 if (!sband) 649 return -EINVAL; 650 651 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 652 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 653 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 654 return 0; 655 656 return ieee80211_put_eht_cap(skb, sdata, sband, NULL); 657 } 658 659 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 660 { 661 const struct ieee80211_sta_eht_cap *eht_cap; 662 struct ieee80211_supported_band *sband; 663 u32 len; 664 u8 *pos; 665 666 sband = ieee80211_get_sband(sdata); 667 if (!sband) 668 return -EINVAL; 669 670 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 671 if (!eht_cap || 672 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 673 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 674 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 675 return 0; 676 677 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 678 offsetof(struct ieee80211_eht_operation_info, optional); 679 680 if (skb_tailroom(skb) < len) 681 return -ENOMEM; 682 683 pos = skb_put(skb, len); 684 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap); 685 686 return 0; 687 } 688 689 static void ieee80211_mesh_path_timer(struct timer_list *t) 690 { 691 struct ieee80211_sub_if_data *sdata = 692 timer_container_of(sdata, t, u.mesh.mesh_path_timer); 693 694 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 695 } 696 697 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 698 { 699 struct ieee80211_sub_if_data *sdata = 700 timer_container_of(sdata, t, u.mesh.mesh_path_root_timer); 701 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 702 703 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 704 705 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 706 } 707 708 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 709 { 710 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 711 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 712 else { 713 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 714 /* stop running timer */ 715 timer_delete_sync(&ifmsh->mesh_path_root_timer); 716 } 717 } 718 719 static void 720 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 721 u8 *ie, u8 ie_len) 722 { 723 struct ieee80211_supported_band *sband; 724 const struct element *cap; 725 const struct ieee80211_he_operation *he_oper = NULL; 726 727 sband = ieee80211_get_sband(sdata); 728 if (!sband) 729 return; 730 731 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 732 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 733 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 734 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 735 return; 736 737 sdata->vif.bss_conf.he_support = true; 738 739 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 740 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 741 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 742 he_oper = (void *)(cap->data + 1); 743 744 if (he_oper) 745 sdata->vif.bss_conf.he_oper.params = 746 __le32_to_cpu(he_oper->he_oper_params); 747 748 sdata->vif.bss_conf.eht_support = 749 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 750 } 751 752 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 753 struct sk_buff *skb, u32 ctrl_flags) 754 { 755 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 756 struct ieee80211_mesh_fast_tx_key key = { 757 .type = MESH_FAST_TX_TYPE_LOCAL 758 }; 759 struct ieee80211_mesh_fast_tx *entry; 760 struct ieee80211s_hdr *meshhdr; 761 u8 sa[ETH_ALEN] __aligned(2); 762 struct tid_ampdu_tx *tid_tx; 763 struct sta_info *sta; 764 bool copy_sa = false; 765 u16 ethertype; 766 u8 tid; 767 768 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 769 return false; 770 771 if (ifmsh->mshcfg.dot11MeshNolearn) 772 return false; 773 774 /* Add support for these cases later */ 775 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 776 return false; 777 778 if (is_multicast_ether_addr(skb->data)) 779 return false; 780 781 ethertype = (skb->data[12] << 8) | skb->data[13]; 782 if (ethertype < ETH_P_802_3_MIN) 783 return false; 784 785 if (sk_requests_wifi_status(skb->sk)) 786 return false; 787 788 if (skb->ip_summed == CHECKSUM_PARTIAL) { 789 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 790 if (skb_checksum_help(skb)) 791 return false; 792 } 793 794 ether_addr_copy(key.addr, skb->data); 795 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr)) 796 key.type = MESH_FAST_TX_TYPE_PROXIED; 797 entry = mesh_fast_tx_get(sdata, &key); 798 if (!entry) 799 return false; 800 801 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 802 return false; 803 804 sta = rcu_dereference(entry->mpath->next_hop); 805 if (!sta) 806 return false; 807 808 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 809 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 810 if (tid_tx) { 811 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 812 return false; 813 if (tid_tx->timeout) 814 tid_tx->last_tx = jiffies; 815 } 816 817 skb = skb_share_check(skb, GFP_ATOMIC); 818 if (!skb) 819 return true; 820 821 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 822 823 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 824 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 825 /* preserve SA from eth header for 6-addr frames */ 826 ether_addr_copy(sa, skb->data + ETH_ALEN); 827 copy_sa = true; 828 } 829 830 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 831 entry->hdrlen); 832 833 meshhdr = (struct ieee80211s_hdr *)skb->data; 834 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 835 &meshhdr->seqnum); 836 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 837 if (copy_sa) 838 ether_addr_copy(meshhdr->eaddr2, sa); 839 840 skb_push(skb, 2 * ETH_ALEN); 841 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 842 entry->mpath->dst, sdata->vif.addr); 843 844 return true; 845 } 846 847 /** 848 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 849 * @hdr: 802.11 frame header 850 * @fc: frame control field 851 * @meshda: destination address in the mesh 852 * @meshsa: source address in the mesh. Same as TA, as frame is 853 * locally originated. 854 * 855 * Returns: the length of the 802.11 frame header (excludes mesh control header) 856 */ 857 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 858 const u8 *meshda, const u8 *meshsa) 859 { 860 if (is_multicast_ether_addr(meshda)) { 861 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 862 /* DA TA SA */ 863 memcpy(hdr->addr1, meshda, ETH_ALEN); 864 memcpy(hdr->addr2, meshsa, ETH_ALEN); 865 memcpy(hdr->addr3, meshsa, ETH_ALEN); 866 return 24; 867 } else { 868 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 869 /* RA TA DA SA */ 870 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 871 memcpy(hdr->addr2, meshsa, ETH_ALEN); 872 memcpy(hdr->addr3, meshda, ETH_ALEN); 873 memcpy(hdr->addr4, meshsa, ETH_ALEN); 874 return 30; 875 } 876 } 877 878 /** 879 * ieee80211_new_mesh_header - create a new mesh header 880 * @sdata: mesh interface to be used 881 * @meshhdr: uninitialized mesh header 882 * @addr4or5: 1st address in the ae header, which may correspond to address 4 883 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 884 * be NULL. 885 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 886 * mesh frame 887 * 888 * Returns: the header length 889 */ 890 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 891 struct ieee80211s_hdr *meshhdr, 892 const char *addr4or5, const char *addr6) 893 { 894 if (WARN_ON(!addr4or5 && addr6)) 895 return 0; 896 897 memset(meshhdr, 0, sizeof(*meshhdr)); 898 899 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 900 901 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 902 &meshhdr->seqnum); 903 if (addr4or5 && !addr6) { 904 meshhdr->flags |= MESH_FLAGS_AE_A4; 905 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 906 return 2 * ETH_ALEN; 907 } else if (addr4or5 && addr6) { 908 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 909 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 910 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 911 return 3 * ETH_ALEN; 912 } 913 914 return ETH_ALEN; 915 } 916 917 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 918 { 919 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 920 u64 changed; 921 922 if (ifmsh->mshcfg.plink_timeout > 0) 923 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 924 mesh_path_expire(sdata); 925 926 changed = mesh_accept_plinks_update(sdata); 927 ieee80211_mbss_info_change_notify(sdata, changed); 928 929 mesh_fast_tx_gc(sdata); 930 931 mod_timer(&ifmsh->housekeeping_timer, 932 round_jiffies(jiffies + 933 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 934 } 935 936 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 937 { 938 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 939 u32 interval; 940 941 mesh_path_tx_root_frame(sdata); 942 943 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 944 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 945 else 946 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 947 948 mod_timer(&ifmsh->mesh_path_root_timer, 949 round_jiffies(TU_TO_EXP_TIME(interval))); 950 } 951 952 static int 953 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 954 { 955 struct beacon_data *bcn; 956 int head_len, tail_len; 957 struct sk_buff *skb; 958 struct ieee80211_mgmt *mgmt; 959 struct mesh_csa_settings *csa; 960 const struct ieee80211_supported_band *sband; 961 u8 ie_len_he_cap, ie_len_eht_cap; 962 u8 *pos; 963 struct ieee80211_sub_if_data *sdata; 964 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 965 966 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 967 968 sband = ieee80211_get_sband(sdata); 969 970 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata); 971 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata); 972 head_len = hdr_len + 973 2 + /* NULL SSID */ 974 /* Channel Switch Announcement */ 975 2 + sizeof(struct ieee80211_channel_sw_ie) + 976 /* Mesh Channel Switch Parameters */ 977 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 978 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 979 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 980 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 981 2 + 8 + /* supported rates */ 982 2 + 3; /* DS params */ 983 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 984 2 + sizeof(struct ieee80211_ht_cap) + 985 2 + sizeof(struct ieee80211_ht_operation) + 986 2 + ifmsh->mesh_id_len + 987 2 + sizeof(struct ieee80211_meshconf_ie) + 988 2 + sizeof(__le16) + /* awake window */ 989 2 + sizeof(struct ieee80211_vht_cap) + 990 2 + sizeof(struct ieee80211_vht_operation) + 991 ie_len_he_cap + 992 2 + 1 + sizeof(struct ieee80211_he_operation) + 993 sizeof(struct ieee80211_he_6ghz_oper) + 994 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 995 ie_len_eht_cap + 996 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 997 offsetof(struct ieee80211_eht_operation_info, optional) + 998 ifmsh->ie_len; 999 1000 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 1001 /* need an skb for IE builders to operate on */ 1002 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 1003 1004 if (!bcn || !skb) 1005 goto out_free; 1006 1007 /* 1008 * pointers go into the block we allocated, 1009 * memory is | beacon_data | head | tail | 1010 */ 1011 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1012 1013 /* fill in the head */ 1014 mgmt = skb_put_zero(skb, hdr_len); 1015 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1016 IEEE80211_STYPE_BEACON); 1017 eth_broadcast_addr(mgmt->da); 1018 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1019 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1020 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1021 mgmt->u.beacon.beacon_int = 1022 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1023 mgmt->u.beacon.capab_info |= cpu_to_le16( 1024 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1025 1026 pos = skb_put(skb, 2); 1027 *pos++ = WLAN_EID_SSID; 1028 *pos++ = 0x0; 1029 1030 rcu_read_lock(); 1031 csa = rcu_dereference(ifmsh->csa); 1032 if (csa) { 1033 enum nl80211_channel_type ct; 1034 struct cfg80211_chan_def *chandef; 1035 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1036 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1037 1038 pos = skb_put_zero(skb, ie_len); 1039 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1040 *pos++ = 3; 1041 *pos++ = 0x0; 1042 *pos++ = ieee80211_frequency_to_channel( 1043 csa->settings.chandef.chan->center_freq); 1044 bcn->cntdwn_current_counter = csa->settings.count; 1045 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1046 *pos++ = csa->settings.count; 1047 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1048 *pos++ = 6; 1049 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1050 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1051 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1052 } else { 1053 *pos++ = ifmsh->chsw_ttl; 1054 } 1055 *pos++ |= csa->settings.block_tx ? 1056 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1057 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1058 pos += 2; 1059 put_unaligned_le16(ifmsh->pre_value, pos); 1060 pos += 2; 1061 1062 switch (csa->settings.chandef.width) { 1063 case NL80211_CHAN_WIDTH_40: 1064 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1065 pos = skb_put_zero(skb, ie_len); 1066 1067 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1068 *pos++ = 1; /* len */ 1069 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1070 if (ct == NL80211_CHAN_HT40PLUS) 1071 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1072 else 1073 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1074 break; 1075 case NL80211_CHAN_WIDTH_80: 1076 case NL80211_CHAN_WIDTH_80P80: 1077 case NL80211_CHAN_WIDTH_160: 1078 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1079 ie_len = 2 + 2 + 1080 sizeof(struct ieee80211_wide_bw_chansw_ie); 1081 pos = skb_put_zero(skb, ie_len); 1082 1083 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1084 *pos++ = 5; /* len */ 1085 /* put sub IE */ 1086 chandef = &csa->settings.chandef; 1087 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1088 break; 1089 default: 1090 break; 1091 } 1092 } 1093 rcu_read_unlock(); 1094 1095 if (ieee80211_put_srates_elem(skb, sband, 1096 sdata->vif.bss_conf.basic_rates, 1097 0, WLAN_EID_SUPP_RATES) || 1098 mesh_add_ds_params_ie(sdata, skb)) 1099 goto out_free; 1100 1101 bcn->head_len = skb->len; 1102 memcpy(bcn->head, skb->data, bcn->head_len); 1103 1104 /* now the tail */ 1105 skb_trim(skb, 0); 1106 bcn->tail = bcn->head + bcn->head_len; 1107 1108 if (ieee80211_put_srates_elem(skb, sband, 1109 sdata->vif.bss_conf.basic_rates, 1110 0, WLAN_EID_EXT_SUPP_RATES) || 1111 mesh_add_rsn_ie(sdata, skb) || 1112 mesh_add_ht_cap_ie(sdata, skb) || 1113 mesh_add_ht_oper_ie(sdata, skb) || 1114 mesh_add_meshid_ie(sdata, skb) || 1115 mesh_add_meshconf_ie(sdata, skb) || 1116 mesh_add_awake_window_ie(sdata, skb) || 1117 mesh_add_vht_cap_ie(sdata, skb) || 1118 mesh_add_vht_oper_ie(sdata, skb) || 1119 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1120 mesh_add_he_oper_ie(sdata, skb) || 1121 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1122 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1123 mesh_add_eht_oper_ie(sdata, skb) || 1124 mesh_add_vendor_ies(sdata, skb)) 1125 goto out_free; 1126 1127 bcn->tail_len = skb->len; 1128 memcpy(bcn->tail, skb->data, bcn->tail_len); 1129 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1130 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1131 (bcn->tail + ifmsh->meshconf_offset); 1132 1133 dev_kfree_skb(skb); 1134 rcu_assign_pointer(ifmsh->beacon, bcn); 1135 return 0; 1136 out_free: 1137 kfree(bcn); 1138 dev_kfree_skb(skb); 1139 return -ENOMEM; 1140 } 1141 1142 static int 1143 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1144 { 1145 struct beacon_data *old_bcn; 1146 int ret; 1147 1148 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1149 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1150 if (ret) 1151 /* just reuse old beacon */ 1152 return ret; 1153 1154 if (old_bcn) 1155 kfree_rcu(old_bcn, rcu_head); 1156 return 0; 1157 } 1158 1159 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1160 u64 changed) 1161 { 1162 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1163 unsigned long bits[] = { BITMAP_FROM_U64(changed) }; 1164 u32 bit; 1165 1166 if (!changed) 1167 return; 1168 1169 /* if we race with running work, worst case this work becomes a noop */ 1170 for_each_set_bit(bit, bits, sizeof(changed) * BITS_PER_BYTE) 1171 set_bit(bit, ifmsh->mbss_changed); 1172 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1173 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1174 } 1175 1176 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1177 { 1178 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1179 struct ieee80211_local *local = sdata->local; 1180 u64 changed = BSS_CHANGED_BEACON | 1181 BSS_CHANGED_BEACON_ENABLED | 1182 BSS_CHANGED_HT | 1183 BSS_CHANGED_BASIC_RATES | 1184 BSS_CHANGED_BEACON_INT | 1185 BSS_CHANGED_MCAST_RATE; 1186 1187 local->fif_other_bss++; 1188 /* mesh ifaces must set allmulti to forward mcast traffic */ 1189 atomic_inc(&local->iff_allmultis); 1190 ieee80211_configure_filter(local); 1191 1192 ifmsh->mesh_cc_id = 0; /* Disabled */ 1193 /* register sync ops from extensible synchronization framework */ 1194 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1195 ifmsh->sync_offset_clockdrift_max = 0; 1196 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1197 ieee80211_mesh_root_setup(ifmsh); 1198 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1199 sdata->vif.bss_conf.ht_operation_mode = 1200 ifmsh->mshcfg.ht_opmode; 1201 sdata->vif.bss_conf.enable_beacon = true; 1202 1203 changed |= ieee80211_mps_local_status_update(sdata); 1204 1205 if (ieee80211_mesh_build_beacon(ifmsh)) { 1206 ieee80211_stop_mesh(sdata); 1207 return -ENOMEM; 1208 } 1209 1210 ieee80211_recalc_dtim(sdata, drv_get_tsf(local, sdata)); 1211 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1212 1213 netif_carrier_on(sdata->dev); 1214 return 0; 1215 } 1216 1217 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1218 { 1219 struct ieee80211_local *local = sdata->local; 1220 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1221 struct beacon_data *bcn; 1222 1223 netif_carrier_off(sdata->dev); 1224 1225 /* flush STAs and mpaths on this iface */ 1226 sta_info_flush(sdata, -1); 1227 ieee80211_free_keys(sdata, true); 1228 mesh_path_flush_by_iface(sdata); 1229 1230 /* stop the beacon */ 1231 ifmsh->mesh_id_len = 0; 1232 sdata->vif.bss_conf.enable_beacon = false; 1233 sdata->beacon_rate_set = false; 1234 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1235 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1236 BSS_CHANGED_BEACON_ENABLED); 1237 1238 /* remove beacon */ 1239 bcn = sdata_dereference(ifmsh->beacon, sdata); 1240 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1241 kfree_rcu(bcn, rcu_head); 1242 1243 /* free all potentially still buffered group-addressed frames */ 1244 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1245 skb_queue_purge(&ifmsh->ps.bc_buf); 1246 1247 timer_delete_sync(&sdata->u.mesh.housekeeping_timer); 1248 timer_delete_sync(&sdata->u.mesh.mesh_path_root_timer); 1249 timer_delete_sync(&sdata->u.mesh.mesh_path_timer); 1250 1251 /* clear any mesh work (for next join) we may have accrued */ 1252 ifmsh->wrkq_flags = 0; 1253 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1254 1255 local->fif_other_bss--; 1256 atomic_dec(&local->iff_allmultis); 1257 ieee80211_configure_filter(local); 1258 } 1259 1260 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1261 { 1262 int err; 1263 1264 /* if the current channel is a DFS channel, mark the channel as 1265 * unavailable. 1266 */ 1267 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1268 &sdata->vif.bss_conf.chanreq.oper, 1269 NL80211_IFTYPE_MESH_POINT); 1270 if (err > 0) 1271 cfg80211_radar_event(sdata->local->hw.wiphy, 1272 &sdata->vif.bss_conf.chanreq.oper, 1273 GFP_ATOMIC); 1274 } 1275 1276 static bool 1277 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1278 struct ieee802_11_elems *elems, bool beacon) 1279 { 1280 struct cfg80211_csa_settings params; 1281 struct ieee80211_csa_ie csa_ie; 1282 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1283 struct ieee80211_supported_band *sband; 1284 int err; 1285 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited; 1286 u32 vht_cap_info = 0; 1287 1288 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1289 1290 sband = ieee80211_get_sband(sdata); 1291 if (!sband) 1292 return false; 1293 1294 switch (sdata->vif.bss_conf.chanreq.oper.width) { 1295 case NL80211_CHAN_WIDTH_20_NOHT: 1296 conn.mode = IEEE80211_CONN_MODE_LEGACY; 1297 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1298 break; 1299 case NL80211_CHAN_WIDTH_20: 1300 conn.mode = IEEE80211_CONN_MODE_HT; 1301 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1302 break; 1303 case NL80211_CHAN_WIDTH_40: 1304 conn.mode = IEEE80211_CONN_MODE_HT; 1305 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40; 1306 break; 1307 default: 1308 break; 1309 } 1310 1311 if (elems->vht_cap_elem) 1312 vht_cap_info = 1313 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1314 1315 memset(¶ms, 0, sizeof(params)); 1316 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1317 vht_cap_info, &conn, 1318 sdata->vif.addr, false, 1319 &csa_ie); 1320 if (err < 0) 1321 return false; 1322 if (err) 1323 return false; 1324 1325 /* Mark the channel unavailable if the reason for the switch is 1326 * regulatory. 1327 */ 1328 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1329 ieee80211_mesh_csa_mark_radar(sdata); 1330 1331 params.chandef = csa_ie.chanreq.oper; 1332 params.count = csa_ie.count; 1333 1334 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1335 IEEE80211_CHAN_DISABLED) || 1336 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1337 NL80211_IFTYPE_MESH_POINT)) { 1338 sdata_info(sdata, 1339 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1340 sdata->vif.addr, 1341 params.chandef.chan->center_freq, 1342 params.chandef.width, 1343 params.chandef.center_freq1, 1344 params.chandef.center_freq2); 1345 return false; 1346 } 1347 1348 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1349 ¶ms.chandef, 1350 NL80211_IFTYPE_MESH_POINT); 1351 if (err < 0) 1352 return false; 1353 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1354 sdata_info(sdata, 1355 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1356 sdata->vif.addr, 1357 params.chandef.chan->center_freq, 1358 params.chandef.width, 1359 params.chandef.center_freq1, 1360 params.chandef.center_freq2); 1361 return false; 1362 } 1363 1364 params.radar_required = err; 1365 1366 if (cfg80211_chandef_identical(¶ms.chandef, 1367 &sdata->vif.bss_conf.chanreq.oper)) { 1368 mcsa_dbg(sdata, 1369 "received csa with an identical chandef, ignoring\n"); 1370 return true; 1371 } 1372 1373 mcsa_dbg(sdata, 1374 "received channel switch announcement to go to channel %d MHz\n", 1375 params.chandef.chan->center_freq); 1376 1377 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1378 if (beacon) { 1379 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1380 if (ifmsh->pre_value >= csa_ie.pre_value) 1381 return false; 1382 ifmsh->pre_value = csa_ie.pre_value; 1383 } 1384 1385 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1386 return false; 1387 1388 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1389 1390 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1391 ¶ms) < 0) 1392 return false; 1393 1394 return true; 1395 } 1396 1397 static void 1398 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1399 struct ieee80211_mgmt *mgmt, size_t len) 1400 { 1401 struct ieee80211_local *local = sdata->local; 1402 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1403 struct sk_buff *presp; 1404 struct beacon_data *bcn; 1405 struct ieee80211_mgmt *hdr; 1406 struct ieee802_11_elems *elems; 1407 size_t baselen; 1408 u8 *pos; 1409 1410 pos = mgmt->u.probe_req.variable; 1411 baselen = (u8 *) pos - (u8 *) mgmt; 1412 if (baselen > len) 1413 return; 1414 1415 elems = ieee802_11_parse_elems(pos, len - baselen, 1416 IEEE80211_FTYPE_MGMT | 1417 IEEE80211_STYPE_PROBE_REQ, 1418 NULL); 1419 if (!elems) 1420 return; 1421 1422 if (!elems->mesh_id) 1423 goto free; 1424 1425 /* 802.11-2012 10.1.4.3.2 */ 1426 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1427 !is_broadcast_ether_addr(mgmt->da)) || 1428 elems->ssid_len != 0) 1429 goto free; 1430 1431 if (elems->mesh_id_len != 0 && 1432 (elems->mesh_id_len != ifmsh->mesh_id_len || 1433 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1434 goto free; 1435 1436 rcu_read_lock(); 1437 bcn = rcu_dereference(ifmsh->beacon); 1438 1439 if (!bcn) 1440 goto out; 1441 1442 presp = dev_alloc_skb(local->tx_headroom + 1443 bcn->head_len + bcn->tail_len); 1444 if (!presp) 1445 goto out; 1446 1447 skb_reserve(presp, local->tx_headroom); 1448 skb_put_data(presp, bcn->head, bcn->head_len); 1449 skb_put_data(presp, bcn->tail, bcn->tail_len); 1450 hdr = (struct ieee80211_mgmt *) presp->data; 1451 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1452 IEEE80211_STYPE_PROBE_RESP); 1453 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1454 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1455 ieee80211_tx_skb(sdata, presp); 1456 out: 1457 rcu_read_unlock(); 1458 free: 1459 kfree(elems); 1460 } 1461 1462 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1463 struct ieee80211_mgmt *mgmt, 1464 size_t len, 1465 struct ieee80211_rx_status *rx_status) 1466 { 1467 u16 type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE; 1468 struct ieee80211_local *local = sdata->local; 1469 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1470 struct ieee802_11_elems *elems; 1471 struct ieee80211_channel *channel; 1472 size_t baselen; 1473 int freq; 1474 enum nl80211_band band = rx_status->band; 1475 1476 /* ignore ProbeResp to foreign address */ 1477 if (type == (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP) && 1478 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1479 return; 1480 1481 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1482 if (baselen > len) 1483 return; 1484 1485 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1486 len - baselen, type, NULL); 1487 if (!elems) 1488 return; 1489 1490 /* ignore non-mesh or secure / insecure mismatch */ 1491 if ((!elems->mesh_id || !elems->mesh_config) || 1492 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1493 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1494 goto free; 1495 1496 if (elems->ds_params) 1497 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1498 else 1499 freq = rx_status->freq; 1500 1501 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1502 1503 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1504 goto free; 1505 1506 if (mesh_matches_local(sdata, elems)) { 1507 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1508 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1509 if (!sdata->u.mesh.user_mpm || 1510 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1511 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1512 mesh_neighbour_update(sdata, mgmt->sa, elems, 1513 rx_status); 1514 1515 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1516 !sdata->vif.bss_conf.csa_active) 1517 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1518 } 1519 1520 if (ifmsh->sync_ops) 1521 ifmsh->sync_ops->rx_bcn_presp(sdata, 1522 type & IEEE80211_FCTL_STYPE, 1523 mgmt, len, 1524 elems->mesh_config, rx_status); 1525 free: 1526 kfree(elems); 1527 } 1528 1529 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1530 { 1531 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1532 struct mesh_csa_settings *tmp_csa_settings; 1533 int ret = 0; 1534 1535 /* Reset the TTL value and Initiator flag */ 1536 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1537 ifmsh->chsw_ttl = 0; 1538 1539 /* Remove the CSA and MCSP elements from the beacon */ 1540 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1541 RCU_INIT_POINTER(ifmsh->csa, NULL); 1542 if (tmp_csa_settings) 1543 kfree_rcu(tmp_csa_settings, rcu_head); 1544 ret = ieee80211_mesh_rebuild_beacon(sdata); 1545 if (ret) 1546 return -EINVAL; 1547 1548 *changed |= BSS_CHANGED_BEACON; 1549 1550 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1551 sdata->vif.bss_conf.chanreq.oper.chan->center_freq); 1552 return 0; 1553 } 1554 1555 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1556 struct cfg80211_csa_settings *csa_settings, 1557 u64 *changed) 1558 { 1559 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1560 struct mesh_csa_settings *tmp_csa_settings; 1561 int ret = 0; 1562 1563 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1564 1565 tmp_csa_settings = kmalloc_obj(*tmp_csa_settings, GFP_ATOMIC); 1566 if (!tmp_csa_settings) 1567 return -ENOMEM; 1568 1569 memcpy(&tmp_csa_settings->settings, csa_settings, 1570 sizeof(struct cfg80211_csa_settings)); 1571 1572 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1573 1574 ret = ieee80211_mesh_rebuild_beacon(sdata); 1575 if (ret) { 1576 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1577 RCU_INIT_POINTER(ifmsh->csa, NULL); 1578 kfree_rcu(tmp_csa_settings, rcu_head); 1579 return ret; 1580 } 1581 1582 *changed |= BSS_CHANGED_BEACON; 1583 return 0; 1584 } 1585 1586 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1587 struct ieee80211_mgmt *mgmt, size_t len, 1588 struct ieee802_11_elems *elems) 1589 { 1590 struct ieee80211_mgmt *mgmt_fwd; 1591 struct sk_buff *skb; 1592 struct ieee80211_local *local = sdata->local; 1593 1594 skb = dev_alloc_skb(local->tx_headroom + len); 1595 if (!skb) 1596 return -ENOMEM; 1597 skb_reserve(skb, local->tx_headroom); 1598 mgmt_fwd = skb_put(skb, len); 1599 1600 elems->mesh_chansw_params_ie->mesh_ttl--; 1601 elems->mesh_chansw_params_ie->mesh_flags &= 1602 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1603 1604 memcpy(mgmt_fwd, mgmt, len); 1605 eth_broadcast_addr(mgmt_fwd->da); 1606 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1607 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1608 1609 ieee80211_tx_skb(sdata, skb); 1610 return 0; 1611 } 1612 1613 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1614 struct ieee80211_mgmt *mgmt, size_t len) 1615 { 1616 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1617 struct ieee802_11_elems *elems; 1618 u16 pre_value; 1619 bool fwd_csa = true; 1620 size_t baselen; 1621 u8 *pos; 1622 1623 if (mgmt->u.action.action_code != WLAN_ACTION_SPCT_CHL_SWITCH) 1624 return; 1625 1626 pos = mgmt->u.action.chan_switch.variable; 1627 baselen = offsetof(struct ieee80211_mgmt, 1628 u.action.chan_switch.variable); 1629 elems = ieee802_11_parse_elems(pos, len - baselen, 1630 IEEE80211_FTYPE_MGMT | 1631 IEEE80211_STYPE_ACTION, 1632 NULL); 1633 if (!elems) 1634 return; 1635 1636 if (!mesh_matches_local(sdata, elems)) 1637 goto free; 1638 1639 if (!elems->mesh_chansw_params_ie) 1640 goto free; 1641 1642 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1643 if (!--ifmsh->chsw_ttl) 1644 fwd_csa = false; 1645 1646 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1647 if (ifmsh->pre_value >= pre_value) 1648 goto free; 1649 1650 ifmsh->pre_value = pre_value; 1651 1652 if (!sdata->vif.bss_conf.csa_active && 1653 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1654 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1655 goto free; 1656 } 1657 1658 /* forward or re-broadcast the CSA frame */ 1659 if (fwd_csa) { 1660 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1661 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1662 } 1663 free: 1664 kfree(elems); 1665 } 1666 1667 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1668 struct ieee80211_mgmt *mgmt, 1669 size_t len, 1670 struct ieee80211_rx_status *rx_status) 1671 { 1672 switch (mgmt->u.action.category) { 1673 case WLAN_CATEGORY_SELF_PROTECTED: 1674 switch (mgmt->u.action.action_code) { 1675 case WLAN_SP_MESH_PEERING_OPEN: 1676 case WLAN_SP_MESH_PEERING_CLOSE: 1677 case WLAN_SP_MESH_PEERING_CONFIRM: 1678 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1679 break; 1680 } 1681 break; 1682 case WLAN_CATEGORY_MESH_ACTION: 1683 if (mesh_action_is_path_sel(mgmt)) 1684 mesh_rx_path_sel_frame(sdata, mgmt, len); 1685 break; 1686 case WLAN_CATEGORY_SPECTRUM_MGMT: 1687 mesh_rx_csa_frame(sdata, mgmt, len); 1688 break; 1689 } 1690 } 1691 1692 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1693 struct sk_buff *skb) 1694 { 1695 struct ieee80211_rx_status *rx_status; 1696 struct ieee80211_mgmt *mgmt; 1697 u16 stype; 1698 1699 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1700 1701 /* mesh already went down */ 1702 if (!sdata->u.mesh.mesh_id_len) 1703 return; 1704 1705 rx_status = IEEE80211_SKB_RXCB(skb); 1706 mgmt = (struct ieee80211_mgmt *) skb->data; 1707 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1708 1709 switch (stype) { 1710 case IEEE80211_STYPE_PROBE_RESP: 1711 case IEEE80211_STYPE_BEACON: 1712 ieee80211_mesh_rx_bcn_presp(sdata, mgmt, skb->len, rx_status); 1713 break; 1714 case IEEE80211_STYPE_PROBE_REQ: 1715 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); 1716 break; 1717 case IEEE80211_STYPE_ACTION: 1718 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 1719 break; 1720 } 1721 } 1722 1723 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1724 { 1725 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1726 u32 bit; 1727 u64 changed = 0; 1728 1729 for_each_set_bit(bit, ifmsh->mbss_changed, 1730 sizeof(changed) * BITS_PER_BYTE) { 1731 clear_bit(bit, ifmsh->mbss_changed); 1732 changed |= BIT(bit); 1733 } 1734 1735 if (sdata->vif.bss_conf.enable_beacon && 1736 (changed & (BSS_CHANGED_BEACON | 1737 BSS_CHANGED_HT | 1738 BSS_CHANGED_BASIC_RATES | 1739 BSS_CHANGED_BEACON_INT))) 1740 if (ieee80211_mesh_rebuild_beacon(sdata)) 1741 return; 1742 1743 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1744 } 1745 1746 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1747 { 1748 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1749 1750 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1751 1752 /* mesh already went down */ 1753 if (!sdata->u.mesh.mesh_id_len) 1754 return; 1755 1756 if (ifmsh->preq_queue_len && 1757 time_after(jiffies, 1758 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1759 mesh_path_start_discovery(sdata); 1760 1761 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1762 ieee80211_mesh_housekeeping(sdata); 1763 1764 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1765 ieee80211_mesh_rootpath(sdata); 1766 1767 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1768 mesh_sync_adjust_tsf(sdata); 1769 1770 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1771 mesh_bss_info_changed(sdata); 1772 } 1773 1774 1775 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1776 { 1777 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1778 static u8 zero_addr[ETH_ALEN] = {}; 1779 1780 timer_setup(&ifmsh->housekeeping_timer, 1781 ieee80211_mesh_housekeeping_timer, 0); 1782 1783 ifmsh->accepting_plinks = true; 1784 atomic_set(&ifmsh->mpaths, 0); 1785 mesh_rmc_init(sdata); 1786 ifmsh->last_preq = jiffies; 1787 ifmsh->next_perr = jiffies; 1788 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1789 ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 1790 /* Allocate all mesh structures when creating the first mesh interface. */ 1791 if (!mesh_allocated) 1792 ieee80211s_init(); 1793 1794 mesh_pathtbl_init(sdata); 1795 1796 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1797 timer_setup(&ifmsh->mesh_path_root_timer, 1798 ieee80211_mesh_path_root_timer, 0); 1799 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1800 skb_queue_head_init(&ifmsh->ps.bc_buf); 1801 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1802 spin_lock_init(&ifmsh->sync_offset_lock); 1803 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1804 1805 sdata->vif.bss_conf.bssid = zero_addr; 1806 } 1807 1808 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1809 { 1810 mesh_rmc_free(sdata); 1811 mesh_pathtbl_unregister(sdata); 1812 } 1813