1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2008, 2009 open80211s Ltd. 4 * Copyright (C) 2018 - 2025 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.u.mesh_action.action_code == 23 WLAN_MESH_ACTION_HWMP_PATH_SELECTION); 24 } 25 26 void ieee80211s_init(void) 27 { 28 mesh_allocated = 1; 29 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), 30 0, 0, NULL); 31 } 32 33 void ieee80211s_stop(void) 34 { 35 if (!mesh_allocated) 36 return; 37 kmem_cache_destroy(rm_cache); 38 } 39 40 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) 41 { 42 struct ieee80211_sub_if_data *sdata = 43 timer_container_of(sdata, t, u.mesh.housekeeping_timer); 44 struct ieee80211_local *local = sdata->local; 45 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 46 47 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 48 49 wiphy_work_queue(local->hw.wiphy, &sdata->work); 50 } 51 52 /** 53 * mesh_matches_local - check if the config of a mesh point matches ours 54 * 55 * @sdata: local mesh subif 56 * @ie: information elements of a management frame from the mesh peer 57 * 58 * This function checks if the mesh configuration of a mesh point matches the 59 * local mesh configuration, i.e. if both nodes belong to the same mesh network. 60 * 61 * Returns: %true if both nodes belong to the same mesh 62 */ 63 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, 64 struct ieee802_11_elems *ie) 65 { 66 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 67 u32 basic_rates = 0; 68 struct cfg80211_chan_def sta_chan_def; 69 struct ieee80211_supported_band *sband; 70 u32 vht_cap_info = 0; 71 72 /* 73 * As support for each feature is added, check for matching 74 * - On mesh config capabilities 75 * - Power Save Support En 76 * - Sync support enabled 77 * - Sync support active 78 * - Sync support required from peer 79 * - MDA enabled 80 * - Power management control on fc 81 */ 82 if (!ie->mesh_config) 83 return false; 84 85 if (!(ifmsh->mesh_id_len == ie->mesh_id_len && 86 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 87 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && 88 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && 89 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && 90 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && 91 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) 92 return false; 93 94 sband = ieee80211_get_sband(sdata); 95 if (!sband) 96 return false; 97 98 ieee80211_sta_get_rates(sdata, ie, sband->band, 99 &basic_rates); 100 101 if (sdata->vif.bss_conf.basic_rates != basic_rates) 102 return false; 103 104 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chanreq.oper.chan, 105 NL80211_CHAN_NO_HT); 106 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); 107 108 if (ie->vht_cap_elem) 109 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); 110 111 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 112 ie->vht_operation, ie->ht_operation, 113 &sta_chan_def); 114 ieee80211_chandef_he_6ghz_oper(sdata->local, ie->he_operation, 115 ie->eht_operation, 116 &sta_chan_def); 117 118 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chanreq.oper, 119 &sta_chan_def)) 120 return false; 121 122 return true; 123 } 124 125 /** 126 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 127 * 128 * @ie: information elements of a management frame from the mesh peer 129 * 130 * Returns: %true if the mesh peer is willing to establish peer links 131 */ 132 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 133 { 134 return (ie->mesh_config->meshconf_cap & 135 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; 136 } 137 138 /** 139 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons 140 * 141 * @sdata: mesh interface in which mesh beacons are going to be updated 142 * 143 * Returns: beacon changed flag if the beacon content changed. 144 */ 145 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 146 { 147 bool free_plinks; 148 u64 changed = 0; 149 150 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 151 * the mesh interface might be able to establish plinks with peers that 152 * are already on the table but are not on PLINK_ESTAB state. However, 153 * in general the mesh interface is not accepting peer link requests 154 * from new peers, and that must be reflected in the beacon 155 */ 156 free_plinks = mesh_plink_availables(sdata); 157 158 if (free_plinks != sdata->u.mesh.accepting_plinks) { 159 sdata->u.mesh.accepting_plinks = free_plinks; 160 changed = BSS_CHANGED_BEACON; 161 } 162 163 return changed; 164 } 165 166 /* 167 * mesh_sta_cleanup - clean up any mesh sta state 168 * 169 * @sta: mesh sta to clean up. 170 */ 171 void mesh_sta_cleanup(struct sta_info *sta) 172 { 173 struct ieee80211_sub_if_data *sdata = sta->sdata; 174 u64 changed = mesh_plink_deactivate(sta); 175 176 if (changed) 177 ieee80211_mbss_info_change_notify(sdata, changed); 178 } 179 180 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 181 { 182 int i; 183 184 sdata->u.mesh.rmc = kmalloc_obj(struct mesh_rmc); 185 if (!sdata->u.mesh.rmc) 186 return -ENOMEM; 187 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 188 for (i = 0; i < RMC_BUCKETS; i++) 189 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); 190 return 0; 191 } 192 193 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 194 { 195 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 196 struct rmc_entry *p; 197 struct hlist_node *n; 198 int i; 199 200 if (!sdata->u.mesh.rmc) 201 return; 202 203 for (i = 0; i < RMC_BUCKETS; i++) { 204 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { 205 hlist_del(&p->list); 206 kmem_cache_free(rm_cache, p); 207 } 208 } 209 210 kfree(rmc); 211 sdata->u.mesh.rmc = NULL; 212 } 213 214 /** 215 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 216 * 217 * @sdata: interface 218 * @sa: source address 219 * @mesh_hdr: mesh_header 220 * 221 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 222 * 223 * Checks using the source address and the mesh sequence number if we have 224 * received this frame lately. If the frame is not in the cache, it is added to 225 * it. 226 */ 227 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 228 const u8 *sa, struct ieee80211s_hdr *mesh_hdr) 229 { 230 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 231 u32 seqnum = 0; 232 int entries = 0; 233 u8 idx; 234 struct rmc_entry *p; 235 struct hlist_node *n; 236 237 if (!rmc) 238 return -1; 239 240 /* Don't care about endianness since only match matters */ 241 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 242 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 243 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { 244 ++entries; 245 if (time_after(jiffies, p->exp_time) || 246 entries == RMC_QUEUE_MAX_LEN) { 247 hlist_del(&p->list); 248 kmem_cache_free(rm_cache, p); 249 --entries; 250 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) 251 return -1; 252 } 253 254 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 255 if (!p) 256 return 0; 257 258 p->seqnum = seqnum; 259 p->exp_time = jiffies + RMC_TIMEOUT; 260 memcpy(p->sa, sa, ETH_ALEN); 261 hlist_add_head(&p->list, &rmc->bucket[idx]); 262 return 0; 263 } 264 265 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, 266 struct sk_buff *skb) 267 { 268 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 269 u8 *pos, neighbors; 270 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); 271 bool is_connected_to_gate = ifmsh->num_gates > 0 || 272 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || 273 ifmsh->mshcfg.dot11MeshConnectedToMeshGate; 274 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; 275 276 if (skb_tailroom(skb) < 2 + meshconf_len) 277 return -ENOMEM; 278 279 pos = skb_put(skb, 2 + meshconf_len); 280 *pos++ = WLAN_EID_MESH_CONFIG; 281 *pos++ = meshconf_len; 282 283 /* save a pointer for quick updates in pre-tbtt */ 284 ifmsh->meshconf_offset = pos - skb->data; 285 286 /* Active path selection protocol ID */ 287 *pos++ = ifmsh->mesh_pp_id; 288 /* Active path selection metric ID */ 289 *pos++ = ifmsh->mesh_pm_id; 290 /* Congestion control mode identifier */ 291 *pos++ = ifmsh->mesh_cc_id; 292 /* Synchronization protocol identifier */ 293 *pos++ = ifmsh->mesh_sp_id; 294 /* Authentication Protocol identifier */ 295 *pos++ = ifmsh->mesh_auth_id; 296 /* Mesh Formation Info - number of neighbors */ 297 neighbors = atomic_read(&ifmsh->estab_plinks); 298 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); 299 *pos++ = (is_connected_to_as << 7) | 300 (neighbors << 1) | 301 is_connected_to_gate; 302 /* Mesh capability */ 303 *pos = 0x00; 304 *pos |= ifmsh->mshcfg.dot11MeshForwarding ? 305 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; 306 *pos |= ifmsh->accepting_plinks ? 307 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; 308 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ 309 *pos |= ifmsh->ps_peers_deep_sleep ? 310 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; 311 return 0; 312 } 313 314 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 315 { 316 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 317 u8 *pos; 318 319 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) 320 return -ENOMEM; 321 322 pos = skb_put(skb, 2 + ifmsh->mesh_id_len); 323 *pos++ = WLAN_EID_MESH_ID; 324 *pos++ = ifmsh->mesh_id_len; 325 if (ifmsh->mesh_id_len) 326 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); 327 328 return 0; 329 } 330 331 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, 332 struct sk_buff *skb) 333 { 334 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 335 u8 *pos; 336 337 /* see IEEE802.11-2012 13.14.6 */ 338 if (ifmsh->ps_peers_light_sleep == 0 && 339 ifmsh->ps_peers_deep_sleep == 0 && 340 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) 341 return 0; 342 343 if (skb_tailroom(skb) < 4) 344 return -ENOMEM; 345 346 pos = skb_put(skb, 2 + 2); 347 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; 348 *pos++ = 2; 349 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); 350 351 return 0; 352 } 353 354 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, 355 struct sk_buff *skb) 356 { 357 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 358 u8 offset, len; 359 const u8 *data; 360 361 if (!ifmsh->ie || !ifmsh->ie_len) 362 return 0; 363 364 /* fast-forward to vendor IEs */ 365 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); 366 367 if (offset < ifmsh->ie_len) { 368 len = ifmsh->ie_len - offset; 369 data = ifmsh->ie + offset; 370 if (skb_tailroom(skb) < len) 371 return -ENOMEM; 372 skb_put_data(skb, data, len); 373 } 374 375 return 0; 376 } 377 378 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 379 { 380 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 381 u8 len = 0; 382 const u8 *data; 383 384 if (!ifmsh->ie || !ifmsh->ie_len) 385 return 0; 386 387 /* find RSN IE */ 388 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); 389 if (!data) 390 return 0; 391 392 len = data[1] + 2; 393 394 if (skb_tailroom(skb) < len) 395 return -ENOMEM; 396 skb_put_data(skb, data, len); 397 398 return 0; 399 } 400 401 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, 402 struct sk_buff *skb) 403 { 404 struct ieee80211_chanctx_conf *chanctx_conf; 405 struct ieee80211_channel *chan; 406 u8 *pos; 407 408 if (skb_tailroom(skb) < 3) 409 return -ENOMEM; 410 411 rcu_read_lock(); 412 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 413 if (WARN_ON(!chanctx_conf)) { 414 rcu_read_unlock(); 415 return -EINVAL; 416 } 417 chan = chanctx_conf->def.chan; 418 rcu_read_unlock(); 419 420 pos = skb_put(skb, 2 + 1); 421 *pos++ = WLAN_EID_DS_PARAMS; 422 *pos++ = 1; 423 *pos++ = ieee80211_frequency_to_channel(chan->center_freq); 424 425 return 0; 426 } 427 428 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, 429 struct sk_buff *skb) 430 { 431 struct ieee80211_supported_band *sband; 432 u8 *pos; 433 434 sband = ieee80211_get_sband(sdata); 435 if (!sband) 436 return -EINVAL; 437 438 /* HT not allowed in 6 GHz */ 439 if (sband->band == NL80211_BAND_6GHZ) 440 return 0; 441 442 if (!sband->ht_cap.ht_supported || 443 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 444 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 445 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 446 return 0; 447 448 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 449 return -ENOMEM; 450 451 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 452 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); 453 454 return 0; 455 } 456 457 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, 458 struct sk_buff *skb) 459 { 460 struct ieee80211_local *local = sdata->local; 461 struct ieee80211_chanctx_conf *chanctx_conf; 462 struct ieee80211_channel *channel; 463 struct ieee80211_supported_band *sband; 464 struct ieee80211_sta_ht_cap *ht_cap; 465 u8 *pos; 466 467 rcu_read_lock(); 468 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 469 if (WARN_ON(!chanctx_conf)) { 470 rcu_read_unlock(); 471 return -EINVAL; 472 } 473 channel = chanctx_conf->def.chan; 474 rcu_read_unlock(); 475 476 sband = local->hw.wiphy->bands[channel->band]; 477 ht_cap = &sband->ht_cap; 478 479 /* HT not allowed in 6 GHz */ 480 if (sband->band == NL80211_BAND_6GHZ) 481 return 0; 482 483 if (!ht_cap->ht_supported || 484 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 485 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 486 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 487 return 0; 488 489 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) 490 return -ENOMEM; 491 492 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); 493 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chanreq.oper, 494 sdata->vif.bss_conf.ht_operation_mode, 495 false); 496 497 return 0; 498 } 499 500 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, 501 struct sk_buff *skb) 502 { 503 struct ieee80211_supported_band *sband; 504 u8 *pos; 505 506 sband = ieee80211_get_sband(sdata); 507 if (!sband) 508 return -EINVAL; 509 510 /* VHT not allowed in 6 GHz */ 511 if (sband->band == NL80211_BAND_6GHZ) 512 return 0; 513 514 if (!sband->vht_cap.vht_supported || 515 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 516 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 517 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 518 return 0; 519 520 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 521 return -ENOMEM; 522 523 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 524 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); 525 526 return 0; 527 } 528 529 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, 530 struct sk_buff *skb) 531 { 532 struct ieee80211_local *local = sdata->local; 533 struct ieee80211_chanctx_conf *chanctx_conf; 534 struct ieee80211_channel *channel; 535 struct ieee80211_supported_band *sband; 536 struct ieee80211_sta_vht_cap *vht_cap; 537 u8 *pos; 538 539 rcu_read_lock(); 540 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 541 if (WARN_ON(!chanctx_conf)) { 542 rcu_read_unlock(); 543 return -EINVAL; 544 } 545 channel = chanctx_conf->def.chan; 546 rcu_read_unlock(); 547 548 sband = local->hw.wiphy->bands[channel->band]; 549 vht_cap = &sband->vht_cap; 550 551 /* VHT not allowed in 6 GHz */ 552 if (sband->band == NL80211_BAND_6GHZ) 553 return 0; 554 555 if (!vht_cap->vht_supported || 556 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 557 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 558 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 559 return 0; 560 561 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) 562 return -ENOMEM; 563 564 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); 565 ieee80211_ie_build_vht_oper(pos, vht_cap, 566 &sdata->vif.bss_conf.chanreq.oper); 567 568 return 0; 569 } 570 571 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, 572 struct sk_buff *skb, u8 ie_len) 573 { 574 struct ieee80211_supported_band *sband; 575 576 sband = ieee80211_get_sband(sdata); 577 if (!sband) 578 return -EINVAL; 579 580 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 581 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 582 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 583 return 0; 584 585 return ieee80211_put_he_cap(skb, sdata, sband, NULL); 586 } 587 588 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, 589 struct sk_buff *skb) 590 { 591 const struct ieee80211_sta_he_cap *he_cap; 592 struct ieee80211_supported_band *sband; 593 u32 len; 594 u8 *pos; 595 596 sband = ieee80211_get_sband(sdata); 597 if (!sband) 598 return -EINVAL; 599 600 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 601 if (!he_cap || 602 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 603 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 604 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 605 return 0; 606 607 len = 2 + 1 + sizeof(struct ieee80211_he_operation); 608 if (sdata->vif.bss_conf.chanreq.oper.chan->band == NL80211_BAND_6GHZ) 609 len += sizeof(struct ieee80211_he_6ghz_oper); 610 611 if (skb_tailroom(skb) < len) 612 return -ENOMEM; 613 614 pos = skb_put(skb, len); 615 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chanreq.oper); 616 617 return 0; 618 } 619 620 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, 621 struct sk_buff *skb) 622 { 623 struct ieee80211_supported_band *sband; 624 const struct ieee80211_sband_iftype_data *iftd; 625 626 sband = ieee80211_get_sband(sdata); 627 if (!sband) 628 return -EINVAL; 629 630 if (sband->band != NL80211_BAND_6GHZ) 631 return 0; 632 633 iftd = ieee80211_get_sband_iftype_data(sband, 634 NL80211_IFTYPE_MESH_POINT); 635 /* The device doesn't support HE in mesh mode or at all */ 636 if (!iftd) 637 return 0; 638 639 ieee80211_put_he_6ghz_cap(skb, sdata, sdata->deflink.smps_mode); 640 return 0; 641 } 642 643 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata, 644 struct sk_buff *skb, u8 ie_len) 645 { 646 struct ieee80211_supported_band *sband; 647 648 sband = ieee80211_get_sband(sdata); 649 if (!sband) 650 return -EINVAL; 651 652 if (sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 653 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 654 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 655 return 0; 656 657 return ieee80211_put_eht_cap(skb, sdata, sband, NULL); 658 } 659 660 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 661 { 662 const struct ieee80211_sta_eht_cap *eht_cap; 663 struct ieee80211_supported_band *sband; 664 u32 len; 665 u8 *pos; 666 667 sband = ieee80211_get_sband(sdata); 668 if (!sband) 669 return -EINVAL; 670 671 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 672 if (!eht_cap || 673 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 674 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 675 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 676 return 0; 677 678 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 679 offsetof(struct ieee80211_eht_operation_info, optional); 680 681 if (skb_tailroom(skb) < len) 682 return -ENOMEM; 683 684 pos = skb_put(skb, len); 685 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chanreq.oper, eht_cap); 686 687 return 0; 688 } 689 690 static void ieee80211_mesh_path_timer(struct timer_list *t) 691 { 692 struct ieee80211_sub_if_data *sdata = 693 timer_container_of(sdata, t, u.mesh.mesh_path_timer); 694 695 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 696 } 697 698 static void ieee80211_mesh_path_root_timer(struct timer_list *t) 699 { 700 struct ieee80211_sub_if_data *sdata = 701 timer_container_of(sdata, t, u.mesh.mesh_path_root_timer); 702 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 703 704 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 705 706 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 707 } 708 709 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) 710 { 711 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) 712 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 713 else { 714 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); 715 /* stop running timer */ 716 timer_delete_sync(&ifmsh->mesh_path_root_timer); 717 } 718 } 719 720 static void 721 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, 722 u8 *ie, u8 ie_len) 723 { 724 struct ieee80211_supported_band *sband; 725 const struct element *cap; 726 const struct ieee80211_he_operation *he_oper = NULL; 727 728 sband = ieee80211_get_sband(sdata); 729 if (!sband) 730 return; 731 732 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || 733 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_20_NOHT || 734 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 735 sdata->vif.bss_conf.chanreq.oper.width == NL80211_CHAN_WIDTH_10) 736 return; 737 738 sdata->vif.bss_conf.he_support = true; 739 740 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); 741 if (cap && cap->datalen >= 1 + sizeof(*he_oper) && 742 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) 743 he_oper = (void *)(cap->data + 1); 744 745 if (he_oper) 746 sdata->vif.bss_conf.he_oper.params = 747 __le32_to_cpu(he_oper->he_oper_params); 748 749 sdata->vif.bss_conf.eht_support = 750 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); 751 } 752 753 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata, 754 struct sk_buff *skb, u32 ctrl_flags) 755 { 756 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 757 struct ieee80211_mesh_fast_tx_key key = { 758 .type = MESH_FAST_TX_TYPE_LOCAL 759 }; 760 struct ieee80211_mesh_fast_tx *entry; 761 struct ieee80211s_hdr *meshhdr; 762 u8 sa[ETH_ALEN] __aligned(2); 763 struct tid_ampdu_tx *tid_tx; 764 struct sta_info *sta; 765 bool copy_sa = false; 766 u16 ethertype; 767 u8 tid; 768 769 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) 770 return false; 771 772 if (ifmsh->mshcfg.dot11MeshNolearn) 773 return false; 774 775 /* Add support for these cases later */ 776 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep) 777 return false; 778 779 if (is_multicast_ether_addr(skb->data)) 780 return false; 781 782 ethertype = (skb->data[12] << 8) | skb->data[13]; 783 if (ethertype < ETH_P_802_3_MIN) 784 return false; 785 786 if (sk_requests_wifi_status(skb->sk)) 787 return false; 788 789 if (skb->ip_summed == CHECKSUM_PARTIAL) { 790 skb_set_transport_header(skb, skb_checksum_start_offset(skb)); 791 if (skb_checksum_help(skb)) 792 return false; 793 } 794 795 ether_addr_copy(key.addr, skb->data); 796 if (!ether_addr_equal(skb->data + ETH_ALEN, sdata->vif.addr)) 797 key.type = MESH_FAST_TX_TYPE_PROXIED; 798 entry = mesh_fast_tx_get(sdata, &key); 799 if (!entry) 800 return false; 801 802 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len) 803 return false; 804 805 sta = rcu_dereference(entry->mpath->next_hop); 806 if (!sta) 807 return false; 808 809 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; 810 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); 811 if (tid_tx) { 812 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) 813 return false; 814 if (tid_tx->timeout) 815 tid_tx->last_tx = jiffies; 816 } 817 818 skb = skb_share_check(skb, GFP_ATOMIC); 819 if (!skb) 820 return true; 821 822 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb)); 823 824 meshhdr = (struct ieee80211s_hdr *)entry->hdr; 825 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) { 826 /* preserve SA from eth header for 6-addr frames */ 827 ether_addr_copy(sa, skb->data + ETH_ALEN); 828 copy_sa = true; 829 } 830 831 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr, 832 entry->hdrlen); 833 834 meshhdr = (struct ieee80211s_hdr *)skb->data; 835 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 836 &meshhdr->seqnum); 837 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 838 if (copy_sa) 839 ether_addr_copy(meshhdr->eaddr2, sa); 840 841 skb_push(skb, 2 * ETH_ALEN); 842 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx, 843 entry->mpath->dst, sdata->vif.addr); 844 845 return true; 846 } 847 848 /** 849 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 850 * @hdr: 802.11 frame header 851 * @fc: frame control field 852 * @meshda: destination address in the mesh 853 * @meshsa: source address in the mesh. Same as TA, as frame is 854 * locally originated. 855 * 856 * Returns: the length of the 802.11 frame header (excludes mesh control header) 857 */ 858 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, 859 const u8 *meshda, const u8 *meshsa) 860 { 861 if (is_multicast_ether_addr(meshda)) { 862 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 863 /* DA TA SA */ 864 memcpy(hdr->addr1, meshda, ETH_ALEN); 865 memcpy(hdr->addr2, meshsa, ETH_ALEN); 866 memcpy(hdr->addr3, meshsa, ETH_ALEN); 867 return 24; 868 } else { 869 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 870 /* RA TA DA SA */ 871 eth_zero_addr(hdr->addr1); /* RA is resolved later */ 872 memcpy(hdr->addr2, meshsa, ETH_ALEN); 873 memcpy(hdr->addr3, meshda, ETH_ALEN); 874 memcpy(hdr->addr4, meshsa, ETH_ALEN); 875 return 30; 876 } 877 } 878 879 /** 880 * ieee80211_new_mesh_header - create a new mesh header 881 * @sdata: mesh interface to be used 882 * @meshhdr: uninitialized mesh header 883 * @addr4or5: 1st address in the ae header, which may correspond to address 4 884 * (if addr6 is NULL) or address 5 (if addr6 is present). It may 885 * be NULL. 886 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the 887 * mesh frame 888 * 889 * Returns: the header length 890 */ 891 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, 892 struct ieee80211s_hdr *meshhdr, 893 const char *addr4or5, const char *addr6) 894 { 895 if (WARN_ON(!addr4or5 && addr6)) 896 return 0; 897 898 memset(meshhdr, 0, sizeof(*meshhdr)); 899 900 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 901 902 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum), 903 &meshhdr->seqnum); 904 if (addr4or5 && !addr6) { 905 meshhdr->flags |= MESH_FLAGS_AE_A4; 906 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 907 return 2 * ETH_ALEN; 908 } else if (addr4or5 && addr6) { 909 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 910 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); 911 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 912 return 3 * ETH_ALEN; 913 } 914 915 return ETH_ALEN; 916 } 917 918 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) 919 { 920 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 921 u64 changed; 922 923 if (ifmsh->mshcfg.plink_timeout > 0) 924 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); 925 mesh_path_expire(sdata); 926 927 changed = mesh_accept_plinks_update(sdata); 928 ieee80211_mbss_info_change_notify(sdata, changed); 929 930 mesh_fast_tx_gc(sdata); 931 932 mod_timer(&ifmsh->housekeeping_timer, 933 round_jiffies(jiffies + 934 IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 935 } 936 937 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) 938 { 939 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 940 u32 interval; 941 942 mesh_path_tx_root_frame(sdata); 943 944 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) 945 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; 946 else 947 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; 948 949 mod_timer(&ifmsh->mesh_path_root_timer, 950 round_jiffies(TU_TO_EXP_TIME(interval))); 951 } 952 953 static int 954 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 955 { 956 struct beacon_data *bcn; 957 int head_len, tail_len; 958 struct sk_buff *skb; 959 struct ieee80211_mgmt *mgmt; 960 struct mesh_csa_settings *csa; 961 const struct ieee80211_supported_band *sband; 962 u8 ie_len_he_cap, ie_len_eht_cap; 963 u8 *pos; 964 struct ieee80211_sub_if_data *sdata; 965 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); 966 967 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); 968 969 sband = ieee80211_get_sband(sdata); 970 971 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata); 972 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata); 973 head_len = hdr_len + 974 2 + /* NULL SSID */ 975 /* Channel Switch Announcement */ 976 2 + sizeof(struct ieee80211_channel_sw_ie) + 977 /* Mesh Channel Switch Parameters */ 978 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + 979 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 980 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + 981 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + 982 2 + 8 + /* supported rates */ 983 2 + 3; /* DS params */ 984 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 985 2 + sizeof(struct ieee80211_ht_cap) + 986 2 + sizeof(struct ieee80211_ht_operation) + 987 2 + ifmsh->mesh_id_len + 988 2 + sizeof(struct ieee80211_meshconf_ie) + 989 2 + sizeof(__le16) + /* awake window */ 990 2 + sizeof(struct ieee80211_vht_cap) + 991 2 + sizeof(struct ieee80211_vht_operation) + 992 ie_len_he_cap + 993 2 + 1 + sizeof(struct ieee80211_he_operation) + 994 sizeof(struct ieee80211_he_6ghz_oper) + 995 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + 996 ie_len_eht_cap + 997 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) + 998 offsetof(struct ieee80211_eht_operation_info, optional) + 999 ifmsh->ie_len; 1000 1001 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); 1002 /* need an skb for IE builders to operate on */ 1003 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); 1004 1005 if (!bcn || !skb) 1006 goto out_free; 1007 1008 /* 1009 * pointers go into the block we allocated, 1010 * memory is | beacon_data | head | tail | 1011 */ 1012 bcn->head = ((u8 *) bcn) + sizeof(*bcn); 1013 1014 /* fill in the head */ 1015 mgmt = skb_put_zero(skb, hdr_len); 1016 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1017 IEEE80211_STYPE_BEACON); 1018 eth_broadcast_addr(mgmt->da); 1019 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1020 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 1021 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); 1022 mgmt->u.beacon.beacon_int = 1023 cpu_to_le16(sdata->vif.bss_conf.beacon_int); 1024 mgmt->u.beacon.capab_info |= cpu_to_le16( 1025 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); 1026 1027 pos = skb_put(skb, 2); 1028 *pos++ = WLAN_EID_SSID; 1029 *pos++ = 0x0; 1030 1031 rcu_read_lock(); 1032 csa = rcu_dereference(ifmsh->csa); 1033 if (csa) { 1034 enum nl80211_channel_type ct; 1035 struct cfg80211_chan_def *chandef; 1036 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + 1037 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); 1038 1039 pos = skb_put_zero(skb, ie_len); 1040 *pos++ = WLAN_EID_CHANNEL_SWITCH; 1041 *pos++ = 3; 1042 *pos++ = 0x0; 1043 *pos++ = ieee80211_frequency_to_channel( 1044 csa->settings.chandef.chan->center_freq); 1045 bcn->cntdwn_current_counter = csa->settings.count; 1046 bcn->cntdwn_counter_offsets[0] = hdr_len + 6; 1047 *pos++ = csa->settings.count; 1048 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; 1049 *pos++ = 6; 1050 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { 1051 *pos++ = ifmsh->mshcfg.dot11MeshTTL; 1052 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1053 } else { 1054 *pos++ = ifmsh->chsw_ttl; 1055 } 1056 *pos++ |= csa->settings.block_tx ? 1057 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 1058 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); 1059 pos += 2; 1060 put_unaligned_le16(ifmsh->pre_value, pos); 1061 pos += 2; 1062 1063 switch (csa->settings.chandef.width) { 1064 case NL80211_CHAN_WIDTH_40: 1065 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); 1066 pos = skb_put_zero(skb, ie_len); 1067 1068 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 1069 *pos++ = 1; /* len */ 1070 ct = cfg80211_get_chandef_type(&csa->settings.chandef); 1071 if (ct == NL80211_CHAN_HT40PLUS) 1072 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1073 else 1074 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1075 break; 1076 case NL80211_CHAN_WIDTH_80: 1077 case NL80211_CHAN_WIDTH_80P80: 1078 case NL80211_CHAN_WIDTH_160: 1079 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ 1080 ie_len = 2 + 2 + 1081 sizeof(struct ieee80211_wide_bw_chansw_ie); 1082 pos = skb_put_zero(skb, ie_len); 1083 1084 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ 1085 *pos++ = 5; /* len */ 1086 /* put sub IE */ 1087 chandef = &csa->settings.chandef; 1088 ieee80211_ie_build_wide_bw_cs(pos, chandef); 1089 break; 1090 default: 1091 break; 1092 } 1093 } 1094 rcu_read_unlock(); 1095 1096 if (ieee80211_put_srates_elem(skb, sband, 1097 sdata->vif.bss_conf.basic_rates, 1098 0, WLAN_EID_SUPP_RATES) || 1099 mesh_add_ds_params_ie(sdata, skb)) 1100 goto out_free; 1101 1102 bcn->head_len = skb->len; 1103 memcpy(bcn->head, skb->data, bcn->head_len); 1104 1105 /* now the tail */ 1106 skb_trim(skb, 0); 1107 bcn->tail = bcn->head + bcn->head_len; 1108 1109 if (ieee80211_put_srates_elem(skb, sband, 1110 sdata->vif.bss_conf.basic_rates, 1111 0, WLAN_EID_EXT_SUPP_RATES) || 1112 mesh_add_rsn_ie(sdata, skb) || 1113 mesh_add_ht_cap_ie(sdata, skb) || 1114 mesh_add_ht_oper_ie(sdata, skb) || 1115 mesh_add_meshid_ie(sdata, skb) || 1116 mesh_add_meshconf_ie(sdata, skb) || 1117 mesh_add_awake_window_ie(sdata, skb) || 1118 mesh_add_vht_cap_ie(sdata, skb) || 1119 mesh_add_vht_oper_ie(sdata, skb) || 1120 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || 1121 mesh_add_he_oper_ie(sdata, skb) || 1122 mesh_add_he_6ghz_cap_ie(sdata, skb) || 1123 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) || 1124 mesh_add_eht_oper_ie(sdata, skb) || 1125 mesh_add_vendor_ies(sdata, skb)) 1126 goto out_free; 1127 1128 bcn->tail_len = skb->len; 1129 memcpy(bcn->tail, skb->data, bcn->tail_len); 1130 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); 1131 bcn->meshconf = (struct ieee80211_meshconf_ie *) 1132 (bcn->tail + ifmsh->meshconf_offset); 1133 1134 dev_kfree_skb(skb); 1135 rcu_assign_pointer(ifmsh->beacon, bcn); 1136 return 0; 1137 out_free: 1138 kfree(bcn); 1139 dev_kfree_skb(skb); 1140 return -ENOMEM; 1141 } 1142 1143 static int 1144 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) 1145 { 1146 struct beacon_data *old_bcn; 1147 int ret; 1148 1149 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); 1150 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); 1151 if (ret) 1152 /* just reuse old beacon */ 1153 return ret; 1154 1155 if (old_bcn) 1156 kfree_rcu(old_bcn, rcu_head); 1157 return 0; 1158 } 1159 1160 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, 1161 u64 changed) 1162 { 1163 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1164 unsigned long bits[] = { BITMAP_FROM_U64(changed) }; 1165 u32 bit; 1166 1167 if (!changed) 1168 return; 1169 1170 /* if we race with running work, worst case this work becomes a noop */ 1171 for_each_set_bit(bit, bits, sizeof(changed) * BITS_PER_BYTE) 1172 set_bit(bit, ifmsh->mbss_changed); 1173 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); 1174 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 1175 } 1176 1177 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 1178 { 1179 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1180 struct ieee80211_local *local = sdata->local; 1181 u64 changed = BSS_CHANGED_BEACON | 1182 BSS_CHANGED_BEACON_ENABLED | 1183 BSS_CHANGED_HT | 1184 BSS_CHANGED_BASIC_RATES | 1185 BSS_CHANGED_BEACON_INT | 1186 BSS_CHANGED_MCAST_RATE; 1187 1188 local->fif_other_bss++; 1189 /* mesh ifaces must set allmulti to forward mcast traffic */ 1190 atomic_inc(&local->iff_allmultis); 1191 ieee80211_configure_filter(local); 1192 1193 ifmsh->mesh_cc_id = 0; /* Disabled */ 1194 /* register sync ops from extensible synchronization framework */ 1195 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); 1196 ifmsh->sync_offset_clockdrift_max = 0; 1197 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); 1198 ieee80211_mesh_root_setup(ifmsh); 1199 wiphy_work_queue(local->hw.wiphy, &sdata->work); 1200 sdata->vif.bss_conf.ht_operation_mode = 1201 ifmsh->mshcfg.ht_opmode; 1202 sdata->vif.bss_conf.enable_beacon = true; 1203 1204 changed |= ieee80211_mps_local_status_update(sdata); 1205 1206 if (ieee80211_mesh_build_beacon(ifmsh)) { 1207 ieee80211_stop_mesh(sdata); 1208 return -ENOMEM; 1209 } 1210 1211 ieee80211_recalc_dtim(sdata, drv_get_tsf(local, sdata)); 1212 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1213 1214 netif_carrier_on(sdata->dev); 1215 return 0; 1216 } 1217 1218 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 1219 { 1220 struct ieee80211_local *local = sdata->local; 1221 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1222 struct beacon_data *bcn; 1223 1224 netif_carrier_off(sdata->dev); 1225 1226 /* flush STAs and mpaths on this iface */ 1227 sta_info_flush(sdata, -1); 1228 ieee80211_free_keys(sdata, true); 1229 mesh_path_flush_by_iface(sdata); 1230 1231 /* stop the beacon */ 1232 ifmsh->mesh_id_len = 0; 1233 sdata->vif.bss_conf.enable_beacon = false; 1234 sdata->beacon_rate_set = false; 1235 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); 1236 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 1237 BSS_CHANGED_BEACON_ENABLED); 1238 1239 /* remove beacon */ 1240 bcn = sdata_dereference(ifmsh->beacon, sdata); 1241 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1242 kfree_rcu(bcn, rcu_head); 1243 1244 /* free all potentially still buffered group-addressed frames */ 1245 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); 1246 skb_queue_purge(&ifmsh->ps.bc_buf); 1247 1248 timer_delete_sync(&sdata->u.mesh.housekeeping_timer); 1249 timer_delete_sync(&sdata->u.mesh.mesh_path_root_timer); 1250 timer_delete_sync(&sdata->u.mesh.mesh_path_timer); 1251 1252 /* clear any mesh work (for next join) we may have accrued */ 1253 ifmsh->wrkq_flags = 0; 1254 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed)); 1255 1256 local->fif_other_bss--; 1257 atomic_dec(&local->iff_allmultis); 1258 ieee80211_configure_filter(local); 1259 } 1260 1261 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) 1262 { 1263 int err; 1264 1265 /* if the current channel is a DFS channel, mark the channel as 1266 * unavailable. 1267 */ 1268 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1269 &sdata->vif.bss_conf.chanreq.oper, 1270 NL80211_IFTYPE_MESH_POINT); 1271 if (err > 0) 1272 cfg80211_radar_event(sdata->local->hw.wiphy, 1273 &sdata->vif.bss_conf.chanreq.oper, 1274 GFP_ATOMIC); 1275 } 1276 1277 static bool 1278 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, 1279 struct ieee802_11_elems *elems, bool beacon) 1280 { 1281 struct cfg80211_csa_settings params; 1282 struct ieee80211_csa_ie csa_ie; 1283 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1284 struct ieee80211_supported_band *sband; 1285 int err; 1286 struct ieee80211_conn_settings conn = ieee80211_conn_settings_unlimited; 1287 u32 vht_cap_info = 0; 1288 1289 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1290 1291 sband = ieee80211_get_sband(sdata); 1292 if (!sband) 1293 return false; 1294 1295 switch (sdata->vif.bss_conf.chanreq.oper.width) { 1296 case NL80211_CHAN_WIDTH_20_NOHT: 1297 conn.mode = IEEE80211_CONN_MODE_LEGACY; 1298 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1299 break; 1300 case NL80211_CHAN_WIDTH_20: 1301 conn.mode = IEEE80211_CONN_MODE_HT; 1302 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1303 break; 1304 case NL80211_CHAN_WIDTH_40: 1305 conn.mode = IEEE80211_CONN_MODE_HT; 1306 conn.bw_limit = IEEE80211_CONN_BW_LIMIT_40; 1307 break; 1308 default: 1309 break; 1310 } 1311 1312 if (elems->vht_cap_elem) 1313 vht_cap_info = 1314 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1315 1316 memset(¶ms, 0, sizeof(params)); 1317 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, 1318 vht_cap_info, &conn, 1319 sdata->vif.addr, false, 1320 &csa_ie); 1321 if (err < 0) 1322 return false; 1323 if (err) 1324 return false; 1325 1326 /* Mark the channel unavailable if the reason for the switch is 1327 * regulatory. 1328 */ 1329 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) 1330 ieee80211_mesh_csa_mark_radar(sdata); 1331 1332 params.chandef = csa_ie.chanreq.oper; 1333 params.count = csa_ie.count; 1334 1335 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, 1336 IEEE80211_CHAN_DISABLED) || 1337 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, 1338 NL80211_IFTYPE_MESH_POINT)) { 1339 sdata_info(sdata, 1340 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1341 sdata->vif.addr, 1342 params.chandef.chan->center_freq, 1343 params.chandef.width, 1344 params.chandef.center_freq1, 1345 params.chandef.center_freq2); 1346 return false; 1347 } 1348 1349 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, 1350 ¶ms.chandef, 1351 NL80211_IFTYPE_MESH_POINT); 1352 if (err < 0) 1353 return false; 1354 if (err > 0 && !ifmsh->userspace_handles_dfs) { 1355 sdata_info(sdata, 1356 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", 1357 sdata->vif.addr, 1358 params.chandef.chan->center_freq, 1359 params.chandef.width, 1360 params.chandef.center_freq1, 1361 params.chandef.center_freq2); 1362 return false; 1363 } 1364 1365 params.radar_required = err; 1366 1367 if (cfg80211_chandef_identical(¶ms.chandef, 1368 &sdata->vif.bss_conf.chanreq.oper)) { 1369 mcsa_dbg(sdata, 1370 "received csa with an identical chandef, ignoring\n"); 1371 return true; 1372 } 1373 1374 mcsa_dbg(sdata, 1375 "received channel switch announcement to go to channel %d MHz\n", 1376 params.chandef.chan->center_freq); 1377 1378 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; 1379 if (beacon) { 1380 ifmsh->chsw_ttl = csa_ie.ttl - 1; 1381 if (ifmsh->pre_value >= csa_ie.pre_value) 1382 return false; 1383 ifmsh->pre_value = csa_ie.pre_value; 1384 } 1385 1386 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) 1387 return false; 1388 1389 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; 1390 1391 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, 1392 ¶ms) < 0) 1393 return false; 1394 1395 return true; 1396 } 1397 1398 static void 1399 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, 1400 struct ieee80211_mgmt *mgmt, size_t len) 1401 { 1402 struct ieee80211_local *local = sdata->local; 1403 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1404 struct sk_buff *presp; 1405 struct beacon_data *bcn; 1406 struct ieee80211_mgmt *hdr; 1407 struct ieee802_11_elems *elems; 1408 size_t baselen; 1409 u8 *pos; 1410 1411 pos = mgmt->u.probe_req.variable; 1412 baselen = (u8 *) pos - (u8 *) mgmt; 1413 if (baselen > len) 1414 return; 1415 1416 elems = ieee802_11_parse_elems(pos, len - baselen, 1417 IEEE80211_FTYPE_MGMT | 1418 IEEE80211_STYPE_PROBE_REQ, 1419 NULL); 1420 if (!elems) 1421 return; 1422 1423 if (!elems->mesh_id) 1424 goto free; 1425 1426 /* 802.11-2012 10.1.4.3.2 */ 1427 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && 1428 !is_broadcast_ether_addr(mgmt->da)) || 1429 elems->ssid_len != 0) 1430 goto free; 1431 1432 if (elems->mesh_id_len != 0 && 1433 (elems->mesh_id_len != ifmsh->mesh_id_len || 1434 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) 1435 goto free; 1436 1437 rcu_read_lock(); 1438 bcn = rcu_dereference(ifmsh->beacon); 1439 1440 if (!bcn) 1441 goto out; 1442 1443 presp = dev_alloc_skb(local->tx_headroom + 1444 bcn->head_len + bcn->tail_len); 1445 if (!presp) 1446 goto out; 1447 1448 skb_reserve(presp, local->tx_headroom); 1449 skb_put_data(presp, bcn->head, bcn->head_len); 1450 skb_put_data(presp, bcn->tail, bcn->tail_len); 1451 hdr = (struct ieee80211_mgmt *) presp->data; 1452 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1453 IEEE80211_STYPE_PROBE_RESP); 1454 memcpy(hdr->da, mgmt->sa, ETH_ALEN); 1455 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1456 ieee80211_tx_skb(sdata, presp); 1457 out: 1458 rcu_read_unlock(); 1459 free: 1460 kfree(elems); 1461 } 1462 1463 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 1464 struct ieee80211_mgmt *mgmt, 1465 size_t len, 1466 struct ieee80211_rx_status *rx_status) 1467 { 1468 u16 type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE; 1469 struct ieee80211_local *local = sdata->local; 1470 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1471 struct ieee802_11_elems *elems; 1472 struct ieee80211_channel *channel; 1473 size_t baselen; 1474 int freq; 1475 enum nl80211_band band = rx_status->band; 1476 1477 /* ignore ProbeResp to foreign address */ 1478 if (type == (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP) && 1479 !ether_addr_equal(mgmt->da, sdata->vif.addr)) 1480 return; 1481 1482 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 1483 if (baselen > len) 1484 return; 1485 1486 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, 1487 len - baselen, type, NULL); 1488 if (!elems) 1489 return; 1490 1491 /* ignore non-mesh or secure / insecure mismatch */ 1492 if ((!elems->mesh_id || !elems->mesh_config) || 1493 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || 1494 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) 1495 goto free; 1496 1497 if (elems->ds_params) 1498 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); 1499 else 1500 freq = rx_status->freq; 1501 1502 channel = ieee80211_get_channel(local->hw.wiphy, freq); 1503 1504 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 1505 goto free; 1506 1507 if (mesh_matches_local(sdata, elems)) { 1508 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", 1509 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); 1510 if (!sdata->u.mesh.user_mpm || 1511 sdata->u.mesh.mshcfg.rssi_threshold == 0 || 1512 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) 1513 mesh_neighbour_update(sdata, mgmt->sa, elems, 1514 rx_status); 1515 1516 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && 1517 !sdata->vif.bss_conf.csa_active) 1518 ieee80211_mesh_process_chnswitch(sdata, elems, true); 1519 } 1520 1521 if (ifmsh->sync_ops) 1522 ifmsh->sync_ops->rx_bcn_presp(sdata, 1523 type & IEEE80211_FCTL_STYPE, 1524 mgmt, len, 1525 elems->mesh_config, rx_status); 1526 free: 1527 kfree(elems); 1528 } 1529 1530 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed) 1531 { 1532 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1533 struct mesh_csa_settings *tmp_csa_settings; 1534 int ret = 0; 1535 1536 /* Reset the TTL value and Initiator flag */ 1537 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1538 ifmsh->chsw_ttl = 0; 1539 1540 /* Remove the CSA and MCSP elements from the beacon */ 1541 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); 1542 RCU_INIT_POINTER(ifmsh->csa, NULL); 1543 if (tmp_csa_settings) 1544 kfree_rcu(tmp_csa_settings, rcu_head); 1545 ret = ieee80211_mesh_rebuild_beacon(sdata); 1546 if (ret) 1547 return -EINVAL; 1548 1549 *changed |= BSS_CHANGED_BEACON; 1550 1551 mcsa_dbg(sdata, "complete switching to center freq %d MHz", 1552 sdata->vif.bss_conf.chanreq.oper.chan->center_freq); 1553 return 0; 1554 } 1555 1556 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, 1557 struct cfg80211_csa_settings *csa_settings, 1558 u64 *changed) 1559 { 1560 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1561 struct mesh_csa_settings *tmp_csa_settings; 1562 int ret = 0; 1563 1564 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1565 1566 tmp_csa_settings = kmalloc_obj(*tmp_csa_settings, GFP_ATOMIC); 1567 if (!tmp_csa_settings) 1568 return -ENOMEM; 1569 1570 memcpy(&tmp_csa_settings->settings, csa_settings, 1571 sizeof(struct cfg80211_csa_settings)); 1572 1573 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); 1574 1575 ret = ieee80211_mesh_rebuild_beacon(sdata); 1576 if (ret) { 1577 tmp_csa_settings = rcu_dereference(ifmsh->csa); 1578 RCU_INIT_POINTER(ifmsh->csa, NULL); 1579 kfree_rcu(tmp_csa_settings, rcu_head); 1580 return ret; 1581 } 1582 1583 *changed |= BSS_CHANGED_BEACON; 1584 return 0; 1585 } 1586 1587 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, 1588 struct ieee80211_mgmt *mgmt, size_t len, 1589 struct ieee802_11_elems *elems) 1590 { 1591 struct ieee80211_mgmt *mgmt_fwd; 1592 struct sk_buff *skb; 1593 struct ieee80211_local *local = sdata->local; 1594 1595 skb = dev_alloc_skb(local->tx_headroom + len); 1596 if (!skb) 1597 return -ENOMEM; 1598 skb_reserve(skb, local->tx_headroom); 1599 mgmt_fwd = skb_put(skb, len); 1600 1601 elems->mesh_chansw_params_ie->mesh_ttl--; 1602 elems->mesh_chansw_params_ie->mesh_flags &= 1603 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 1604 1605 memcpy(mgmt_fwd, mgmt, len); 1606 eth_broadcast_addr(mgmt_fwd->da); 1607 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); 1608 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); 1609 1610 ieee80211_tx_skb(sdata, skb); 1611 return 0; 1612 } 1613 1614 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, 1615 struct ieee80211_mgmt *mgmt, size_t len) 1616 { 1617 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1618 struct ieee802_11_elems *elems; 1619 u16 pre_value; 1620 bool fwd_csa = true; 1621 size_t baselen; 1622 u8 *pos; 1623 1624 if (mgmt->u.action.u.measurement.action_code != 1625 WLAN_ACTION_SPCT_CHL_SWITCH) 1626 return; 1627 1628 pos = mgmt->u.action.u.chan_switch.variable; 1629 baselen = offsetof(struct ieee80211_mgmt, 1630 u.action.u.chan_switch.variable); 1631 elems = ieee802_11_parse_elems(pos, len - baselen, 1632 IEEE80211_FTYPE_MGMT | 1633 IEEE80211_STYPE_ACTION, 1634 NULL); 1635 if (!elems) 1636 return; 1637 1638 if (!mesh_matches_local(sdata, elems)) 1639 goto free; 1640 1641 if (!elems->mesh_chansw_params_ie) 1642 goto free; 1643 1644 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; 1645 if (!--ifmsh->chsw_ttl) 1646 fwd_csa = false; 1647 1648 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); 1649 if (ifmsh->pre_value >= pre_value) 1650 goto free; 1651 1652 ifmsh->pre_value = pre_value; 1653 1654 if (!sdata->vif.bss_conf.csa_active && 1655 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { 1656 mcsa_dbg(sdata, "Failed to process CSA action frame"); 1657 goto free; 1658 } 1659 1660 /* forward or re-broadcast the CSA frame */ 1661 if (fwd_csa) { 1662 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) 1663 mcsa_dbg(sdata, "Failed to forward the CSA frame"); 1664 } 1665 free: 1666 kfree(elems); 1667 } 1668 1669 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 1670 struct ieee80211_mgmt *mgmt, 1671 size_t len, 1672 struct ieee80211_rx_status *rx_status) 1673 { 1674 switch (mgmt->u.action.category) { 1675 case WLAN_CATEGORY_SELF_PROTECTED: 1676 switch (mgmt->u.action.u.self_prot.action_code) { 1677 case WLAN_SP_MESH_PEERING_OPEN: 1678 case WLAN_SP_MESH_PEERING_CLOSE: 1679 case WLAN_SP_MESH_PEERING_CONFIRM: 1680 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1681 break; 1682 } 1683 break; 1684 case WLAN_CATEGORY_MESH_ACTION: 1685 if (mesh_action_is_path_sel(mgmt)) 1686 mesh_rx_path_sel_frame(sdata, mgmt, len); 1687 break; 1688 case WLAN_CATEGORY_SPECTRUM_MGMT: 1689 mesh_rx_csa_frame(sdata, mgmt, len); 1690 break; 1691 } 1692 } 1693 1694 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 1695 struct sk_buff *skb) 1696 { 1697 struct ieee80211_rx_status *rx_status; 1698 struct ieee80211_mgmt *mgmt; 1699 u16 stype; 1700 1701 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1702 1703 /* mesh already went down */ 1704 if (!sdata->u.mesh.mesh_id_len) 1705 return; 1706 1707 rx_status = IEEE80211_SKB_RXCB(skb); 1708 mgmt = (struct ieee80211_mgmt *) skb->data; 1709 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 1710 1711 switch (stype) { 1712 case IEEE80211_STYPE_PROBE_RESP: 1713 case IEEE80211_STYPE_BEACON: 1714 ieee80211_mesh_rx_bcn_presp(sdata, mgmt, skb->len, 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 } 1724 1725 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) 1726 { 1727 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1728 u32 bit; 1729 u64 changed = 0; 1730 1731 for_each_set_bit(bit, ifmsh->mbss_changed, 1732 sizeof(changed) * BITS_PER_BYTE) { 1733 clear_bit(bit, ifmsh->mbss_changed); 1734 changed |= BIT(bit); 1735 } 1736 1737 if (sdata->vif.bss_conf.enable_beacon && 1738 (changed & (BSS_CHANGED_BEACON | 1739 BSS_CHANGED_HT | 1740 BSS_CHANGED_BASIC_RATES | 1741 BSS_CHANGED_BEACON_INT))) 1742 if (ieee80211_mesh_rebuild_beacon(sdata)) 1743 return; 1744 1745 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); 1746 } 1747 1748 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) 1749 { 1750 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1751 1752 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1753 1754 /* mesh already went down */ 1755 if (!sdata->u.mesh.mesh_id_len) 1756 return; 1757 1758 if (ifmsh->preq_queue_len && 1759 time_after(jiffies, 1760 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 1761 mesh_path_start_discovery(sdata); 1762 1763 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 1764 ieee80211_mesh_housekeeping(sdata); 1765 1766 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) 1767 ieee80211_mesh_rootpath(sdata); 1768 1769 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) 1770 mesh_sync_adjust_tsf(sdata); 1771 1772 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) 1773 mesh_bss_info_changed(sdata); 1774 } 1775 1776 1777 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 1778 { 1779 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 1780 static u8 zero_addr[ETH_ALEN] = {}; 1781 1782 timer_setup(&ifmsh->housekeeping_timer, 1783 ieee80211_mesh_housekeeping_timer, 0); 1784 1785 ifmsh->accepting_plinks = true; 1786 atomic_set(&ifmsh->mpaths, 0); 1787 mesh_rmc_init(sdata); 1788 ifmsh->last_preq = jiffies; 1789 ifmsh->next_perr = jiffies; 1790 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; 1791 ifmsh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE; 1792 /* Allocate all mesh structures when creating the first mesh interface. */ 1793 if (!mesh_allocated) 1794 ieee80211s_init(); 1795 1796 mesh_pathtbl_init(sdata); 1797 1798 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); 1799 timer_setup(&ifmsh->mesh_path_root_timer, 1800 ieee80211_mesh_path_root_timer, 0); 1801 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 1802 skb_queue_head_init(&ifmsh->ps.bc_buf); 1803 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 1804 spin_lock_init(&ifmsh->sync_offset_lock); 1805 RCU_INIT_POINTER(ifmsh->beacon, NULL); 1806 1807 sdata->vif.bss_conf.bssid = zero_addr; 1808 } 1809 1810 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) 1811 { 1812 mesh_rmc_free(sdata); 1813 mesh_pathtbl_unregister(sdata); 1814 } 1815