1 /* 2 * Copyright (c) 2008 open80211s Ltd. 3 * Authors: Luis Carlos Cobo <luisca@cozybit.com> 4 * Javier Cardona <javier@cozybit.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <asm/unaligned.h> 12 #include "ieee80211_i.h" 13 #include "mesh.h" 14 15 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) 16 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) 17 18 #define PP_OFFSET 1 /* Path Selection Protocol */ 19 #define PM_OFFSET 5 /* Path Selection Metric */ 20 #define CC_OFFSET 9 /* Congestion Control Mode */ 21 #define SP_OFFSET 13 /* Synchronization Protocol */ 22 #define AUTH_OFFSET 17 /* Authentication Protocol */ 23 #define CAPAB_OFFSET 22 24 #define CAPAB_ACCEPT_PLINKS 0x80 25 #define CAPAB_FORWARDING 0x10 26 27 #define TMR_RUNNING_HK 0 28 #define TMR_RUNNING_MP 1 29 30 int mesh_allocated; 31 static struct kmem_cache *rm_cache; 32 33 void ieee80211s_init(void) 34 { 35 mesh_pathtbl_init(); 36 mesh_allocated = 1; 37 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), 38 0, 0, NULL); 39 } 40 41 void ieee80211s_stop(void) 42 { 43 mesh_pathtbl_unregister(); 44 kmem_cache_destroy(rm_cache); 45 } 46 47 static void ieee80211_mesh_housekeeping_timer(unsigned long data) 48 { 49 struct ieee80211_sub_if_data *sdata = (void *) data; 50 struct ieee80211_local *local = sdata->local; 51 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 52 53 ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING; 54 55 if (local->quiescing) { 56 set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); 57 return; 58 } 59 60 ieee80211_queue_work(&local->hw, &ifmsh->work); 61 } 62 63 /** 64 * mesh_matches_local - check if the config of a mesh point matches ours 65 * 66 * @ie: information elements of a management frame from the mesh peer 67 * @sdata: local mesh subif 68 * 69 * This function checks if the mesh configuration of a mesh point matches the 70 * local mesh configuration, i.e. if both nodes belong to the same mesh network. 71 */ 72 bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) 73 { 74 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 75 76 /* 77 * As support for each feature is added, check for matching 78 * - On mesh config capabilities 79 * - Power Save Support En 80 * - Sync support enabled 81 * - Sync support active 82 * - Sync support required from peer 83 * - MDA enabled 84 * - Power management control on fc 85 */ 86 if (ifmsh->mesh_id_len == ie->mesh_id_len && 87 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && 88 memcmp(ifmsh->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 && 89 memcmp(ifmsh->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 && 90 memcmp(ifmsh->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0 && 91 memcmp(ifmsh->mesh_sp_id, ie->mesh_config + SP_OFFSET, 4) == 0 && 92 memcmp(ifmsh->mesh_auth_id, ie->mesh_config + AUTH_OFFSET, 4) == 0) 93 return true; 94 95 return false; 96 } 97 98 /** 99 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links 100 * 101 * @ie: information elements of a management frame from the mesh peer 102 */ 103 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) 104 { 105 return (*(ie->mesh_config + CAPAB_OFFSET) & CAPAB_ACCEPT_PLINKS) != 0; 106 } 107 108 /** 109 * mesh_accept_plinks_update: update accepting_plink in local mesh beacons 110 * 111 * @sdata: mesh interface in which mesh beacons are going to be updated 112 */ 113 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) 114 { 115 bool free_plinks; 116 117 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, 118 * the mesh interface might be able to establish plinks with peers that 119 * are already on the table but are not on PLINK_ESTAB state. However, 120 * in general the mesh interface is not accepting peer link requests 121 * from new peers, and that must be reflected in the beacon 122 */ 123 free_plinks = mesh_plink_availables(sdata); 124 125 if (free_plinks != sdata->u.mesh.accepting_plinks) 126 ieee80211_mesh_housekeeping_timer((unsigned long) sdata); 127 } 128 129 void mesh_ids_set_default(struct ieee80211_if_mesh *sta) 130 { 131 u8 oui[3] = {0x00, 0x0F, 0xAC}; 132 133 memcpy(sta->mesh_pp_id, oui, sizeof(oui)); 134 memcpy(sta->mesh_pm_id, oui, sizeof(oui)); 135 memcpy(sta->mesh_cc_id, oui, sizeof(oui)); 136 memcpy(sta->mesh_sp_id, oui, sizeof(oui)); 137 memcpy(sta->mesh_auth_id, oui, sizeof(oui)); 138 sta->mesh_pp_id[sizeof(oui)] = 0; 139 sta->mesh_pm_id[sizeof(oui)] = 0; 140 sta->mesh_cc_id[sizeof(oui)] = 0xff; 141 sta->mesh_sp_id[sizeof(oui)] = 0xff; 142 sta->mesh_auth_id[sizeof(oui)] = 0x0; 143 } 144 145 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) 146 { 147 int i; 148 149 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); 150 if (!sdata->u.mesh.rmc) 151 return -ENOMEM; 152 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; 153 for (i = 0; i < RMC_BUCKETS; i++) 154 INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); 155 return 0; 156 } 157 158 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) 159 { 160 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 161 struct rmc_entry *p, *n; 162 int i; 163 164 if (!sdata->u.mesh.rmc) 165 return; 166 167 for (i = 0; i < RMC_BUCKETS; i++) 168 list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { 169 list_del(&p->list); 170 kmem_cache_free(rm_cache, p); 171 } 172 173 kfree(rmc); 174 sdata->u.mesh.rmc = NULL; 175 } 176 177 /** 178 * mesh_rmc_check - Check frame in recent multicast cache and add if absent. 179 * 180 * @sa: source address 181 * @mesh_hdr: mesh_header 182 * 183 * Returns: 0 if the frame is not in the cache, nonzero otherwise. 184 * 185 * Checks using the source address and the mesh sequence number if we have 186 * received this frame lately. If the frame is not in the cache, it is added to 187 * it. 188 */ 189 int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, 190 struct ieee80211_sub_if_data *sdata) 191 { 192 struct mesh_rmc *rmc = sdata->u.mesh.rmc; 193 u32 seqnum = 0; 194 int entries = 0; 195 u8 idx; 196 struct rmc_entry *p, *n; 197 198 /* Don't care about endianness since only match matters */ 199 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); 200 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; 201 list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { 202 ++entries; 203 if (time_after(jiffies, p->exp_time) || 204 (entries == RMC_QUEUE_MAX_LEN)) { 205 list_del(&p->list); 206 kmem_cache_free(rm_cache, p); 207 --entries; 208 } else if ((seqnum == p->seqnum) 209 && (memcmp(sa, p->sa, ETH_ALEN) == 0)) 210 return -1; 211 } 212 213 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); 214 if (!p) { 215 printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); 216 return 0; 217 } 218 p->seqnum = seqnum; 219 p->exp_time = jiffies + RMC_TIMEOUT; 220 memcpy(p->sa, sa, ETH_ALEN); 221 list_add(&p->list, &rmc->bucket[idx].list); 222 return 0; 223 } 224 225 void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) 226 { 227 struct ieee80211_local *local = sdata->local; 228 struct ieee80211_supported_band *sband; 229 u8 *pos; 230 int len, i, rate; 231 232 sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; 233 len = sband->n_bitrates; 234 if (len > 8) 235 len = 8; 236 pos = skb_put(skb, len + 2); 237 *pos++ = WLAN_EID_SUPP_RATES; 238 *pos++ = len; 239 for (i = 0; i < len; i++) { 240 rate = sband->bitrates[i].bitrate; 241 *pos++ = (u8) (rate / 5); 242 } 243 244 if (sband->n_bitrates > len) { 245 pos = skb_put(skb, sband->n_bitrates - len + 2); 246 *pos++ = WLAN_EID_EXT_SUPP_RATES; 247 *pos++ = sband->n_bitrates - len; 248 for (i = len; i < sband->n_bitrates; i++) { 249 rate = sband->bitrates[i].bitrate; 250 *pos++ = (u8) (rate / 5); 251 } 252 } 253 254 pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); 255 *pos++ = WLAN_EID_MESH_ID; 256 *pos++ = sdata->u.mesh.mesh_id_len; 257 if (sdata->u.mesh.mesh_id_len) 258 memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); 259 260 pos = skb_put(skb, 2 + IEEE80211_MESH_CONFIG_LEN); 261 *pos++ = WLAN_EID_MESH_CONFIG; 262 *pos++ = IEEE80211_MESH_CONFIG_LEN; 263 /* Version */ 264 *pos++ = 1; 265 266 /* Active path selection protocol ID */ 267 memcpy(pos, sdata->u.mesh.mesh_pp_id, 4); 268 pos += 4; 269 270 /* Active path selection metric ID */ 271 memcpy(pos, sdata->u.mesh.mesh_pm_id, 4); 272 pos += 4; 273 274 /* Congestion control mode identifier */ 275 memcpy(pos, sdata->u.mesh.mesh_cc_id, 4); 276 pos += 4; 277 278 /* Synchronization protocol identifier */ 279 memcpy(pos, sdata->u.mesh.mesh_sp_id, 4); 280 pos += 4; 281 282 /* Authentication Protocol identifier */ 283 memcpy(pos, sdata->u.mesh.mesh_auth_id, 4); 284 pos += 4; 285 286 /* Mesh Formation Info */ 287 memset(pos, 0x00, 1); 288 pos += 1; 289 290 /* Mesh capability */ 291 sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); 292 *pos = CAPAB_FORWARDING; 293 *pos++ |= sdata->u.mesh.accepting_plinks ? CAPAB_ACCEPT_PLINKS : 0x00; 294 *pos++ = 0x00; 295 296 return; 297 } 298 299 u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) 300 { 301 /* Use last four bytes of hw addr and interface index as hash index */ 302 return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) 303 & tbl->hash_mask; 304 } 305 306 struct mesh_table *mesh_table_alloc(int size_order) 307 { 308 int i; 309 struct mesh_table *newtbl; 310 311 newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); 312 if (!newtbl) 313 return NULL; 314 315 newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * 316 (1 << size_order), GFP_KERNEL); 317 318 if (!newtbl->hash_buckets) { 319 kfree(newtbl); 320 return NULL; 321 } 322 323 newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * 324 (1 << size_order), GFP_KERNEL); 325 if (!newtbl->hashwlock) { 326 kfree(newtbl->hash_buckets); 327 kfree(newtbl); 328 return NULL; 329 } 330 331 newtbl->size_order = size_order; 332 newtbl->hash_mask = (1 << size_order) - 1; 333 atomic_set(&newtbl->entries, 0); 334 get_random_bytes(&newtbl->hash_rnd, 335 sizeof(newtbl->hash_rnd)); 336 for (i = 0; i <= newtbl->hash_mask; i++) 337 spin_lock_init(&newtbl->hashwlock[i]); 338 339 return newtbl; 340 } 341 342 343 static void ieee80211_mesh_path_timer(unsigned long data) 344 { 345 struct ieee80211_sub_if_data *sdata = 346 (struct ieee80211_sub_if_data *) data; 347 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 348 struct ieee80211_local *local = sdata->local; 349 350 if (local->quiescing) { 351 set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); 352 return; 353 } 354 355 ieee80211_queue_work(&local->hw, &ifmsh->work); 356 } 357 358 /** 359 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame 360 * @hdr: 802.11 frame header 361 * @fc: frame control field 362 * @meshda: destination address in the mesh 363 * @meshsa: source address address in the mesh. Same as TA, as frame is 364 * locally originated. 365 * 366 * Return the length of the 802.11 (does not include a mesh control header) 367 */ 368 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, char 369 *meshda, char *meshsa) { 370 if (is_multicast_ether_addr(meshda)) { 371 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 372 /* DA TA SA */ 373 memcpy(hdr->addr1, meshda, ETH_ALEN); 374 memcpy(hdr->addr2, meshsa, ETH_ALEN); 375 memcpy(hdr->addr3, meshsa, ETH_ALEN); 376 return 24; 377 } else { 378 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | 379 IEEE80211_FCTL_TODS); 380 /* RA TA DA SA */ 381 memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ 382 memcpy(hdr->addr2, meshsa, ETH_ALEN); 383 memcpy(hdr->addr3, meshda, ETH_ALEN); 384 memcpy(hdr->addr4, meshsa, ETH_ALEN); 385 return 30; 386 } 387 } 388 389 /** 390 * ieee80211_new_mesh_header - create a new mesh header 391 * @meshhdr: uninitialized mesh header 392 * @sdata: mesh interface to be used 393 * @addr4: addr4 of the mesh frame (1st in ae header) 394 * may be NULL 395 * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) 396 * may be NULL unless addr6 is present 397 * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) 398 * may be NULL unless addr5 is present 399 * 400 * Return the header length. 401 */ 402 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, 403 struct ieee80211_sub_if_data *sdata, char *addr4, 404 char *addr5, char *addr6) 405 { 406 int aelen = 0; 407 memset(meshhdr, 0, sizeof(meshhdr)); 408 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; 409 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); 410 sdata->u.mesh.mesh_seqnum++; 411 if (addr4) { 412 meshhdr->flags |= MESH_FLAGS_AE_A4; 413 aelen += ETH_ALEN; 414 memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); 415 } 416 if (addr5 && addr6) { 417 meshhdr->flags |= MESH_FLAGS_AE_A5_A6; 418 aelen += 2 * ETH_ALEN; 419 if (!addr4) { 420 memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); 421 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); 422 } else { 423 memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); 424 memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); 425 } 426 } 427 return 6 + aelen; 428 } 429 430 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, 431 struct ieee80211_if_mesh *ifmsh) 432 { 433 bool free_plinks; 434 435 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG 436 printk(KERN_DEBUG "%s: running mesh housekeeping\n", 437 sdata->dev->name); 438 #endif 439 440 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); 441 mesh_path_expire(sdata); 442 443 free_plinks = mesh_plink_availables(sdata); 444 if (free_plinks != sdata->u.mesh.accepting_plinks) 445 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); 446 447 mod_timer(&ifmsh->housekeeping_timer, 448 round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); 449 } 450 451 #ifdef CONFIG_PM 452 void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) 453 { 454 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 455 456 /* might restart the timer but that doesn't matter */ 457 cancel_work_sync(&ifmsh->work); 458 459 /* use atomic bitops in case both timers fire at the same time */ 460 461 if (del_timer_sync(&ifmsh->housekeeping_timer)) 462 set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); 463 if (del_timer_sync(&ifmsh->mesh_path_timer)) 464 set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); 465 } 466 467 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) 468 { 469 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 470 471 if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) 472 add_timer(&ifmsh->housekeeping_timer); 473 if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) 474 add_timer(&ifmsh->mesh_path_timer); 475 } 476 #endif 477 478 void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) 479 { 480 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 481 struct ieee80211_local *local = sdata->local; 482 483 ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING; 484 ieee80211_queue_work(&local->hw, &ifmsh->work); 485 sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; 486 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | 487 BSS_CHANGED_BEACON_ENABLED | 488 BSS_CHANGED_BEACON_INT); 489 } 490 491 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) 492 { 493 del_timer_sync(&sdata->u.mesh.housekeeping_timer); 494 /* 495 * If the timer fired while we waited for it, it will have 496 * requeued the work. Now the work will be running again 497 * but will not rearm the timer again because it checks 498 * whether the interface is running, which, at this point, 499 * it no longer is. 500 */ 501 cancel_work_sync(&sdata->u.mesh.work); 502 503 /* 504 * When we get here, the interface is marked down. 505 * Call synchronize_rcu() to wait for the RX path 506 * should it be using the interface and enqueuing 507 * frames at this very time on another CPU. 508 */ 509 rcu_barrier(); /* Wait for RX path and call_rcu()'s */ 510 skb_queue_purge(&sdata->u.mesh.skb_queue); 511 } 512 513 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, 514 u16 stype, 515 struct ieee80211_mgmt *mgmt, 516 size_t len, 517 struct ieee80211_rx_status *rx_status) 518 { 519 struct ieee80211_local *local = sdata->local; 520 struct ieee802_11_elems elems; 521 struct ieee80211_channel *channel; 522 u32 supp_rates = 0; 523 size_t baselen; 524 int freq; 525 enum ieee80211_band band = rx_status->band; 526 527 /* ignore ProbeResp to foreign address */ 528 if (stype == IEEE80211_STYPE_PROBE_RESP && 529 compare_ether_addr(mgmt->da, sdata->dev->dev_addr)) 530 return; 531 532 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 533 if (baselen > len) 534 return; 535 536 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, 537 &elems); 538 539 if (elems.ds_params && elems.ds_params_len == 1) 540 freq = ieee80211_channel_to_frequency(elems.ds_params[0]); 541 else 542 freq = rx_status->freq; 543 544 channel = ieee80211_get_channel(local->hw.wiphy, freq); 545 546 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) 547 return; 548 549 if (elems.mesh_id && elems.mesh_config && 550 mesh_matches_local(&elems, sdata)) { 551 supp_rates = ieee80211_sta_get_rates(local, &elems, band); 552 553 mesh_neighbour_update(mgmt->sa, supp_rates, sdata, 554 mesh_peer_accepts_plinks(&elems)); 555 } 556 } 557 558 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, 559 struct ieee80211_mgmt *mgmt, 560 size_t len, 561 struct ieee80211_rx_status *rx_status) 562 { 563 switch (mgmt->u.action.category) { 564 case PLINK_CATEGORY: 565 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 566 break; 567 case MESH_PATH_SEL_CATEGORY: 568 mesh_rx_path_sel_frame(sdata, mgmt, len); 569 break; 570 } 571 } 572 573 static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 574 struct sk_buff *skb) 575 { 576 struct ieee80211_rx_status *rx_status; 577 struct ieee80211_if_mesh *ifmsh; 578 struct ieee80211_mgmt *mgmt; 579 u16 stype; 580 581 ifmsh = &sdata->u.mesh; 582 583 rx_status = IEEE80211_SKB_RXCB(skb); 584 mgmt = (struct ieee80211_mgmt *) skb->data; 585 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; 586 587 switch (stype) { 588 case IEEE80211_STYPE_PROBE_RESP: 589 case IEEE80211_STYPE_BEACON: 590 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, 591 rx_status); 592 break; 593 case IEEE80211_STYPE_ACTION: 594 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); 595 break; 596 } 597 598 kfree_skb(skb); 599 } 600 601 static void ieee80211_mesh_work(struct work_struct *work) 602 { 603 struct ieee80211_sub_if_data *sdata = 604 container_of(work, struct ieee80211_sub_if_data, u.mesh.work); 605 struct ieee80211_local *local = sdata->local; 606 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 607 struct sk_buff *skb; 608 609 if (!netif_running(sdata->dev)) 610 return; 611 612 if (local->scanning) 613 return; 614 615 while ((skb = skb_dequeue(&ifmsh->skb_queue))) 616 ieee80211_mesh_rx_queued_mgmt(sdata, skb); 617 618 if (ifmsh->preq_queue_len && 619 time_after(jiffies, 620 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) 621 mesh_path_start_discovery(sdata); 622 623 if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) 624 mesh_mpath_table_grow(); 625 626 if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) 627 mesh_mpp_table_grow(); 628 629 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) 630 ieee80211_mesh_housekeeping(sdata, ifmsh); 631 } 632 633 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) 634 { 635 struct ieee80211_sub_if_data *sdata; 636 637 rcu_read_lock(); 638 list_for_each_entry_rcu(sdata, &local->interfaces, list) 639 if (ieee80211_vif_is_mesh(&sdata->vif)) 640 ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); 641 rcu_read_unlock(); 642 } 643 644 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) 645 { 646 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 647 648 INIT_WORK(&ifmsh->work, ieee80211_mesh_work); 649 setup_timer(&ifmsh->housekeeping_timer, 650 ieee80211_mesh_housekeeping_timer, 651 (unsigned long) sdata); 652 skb_queue_head_init(&sdata->u.mesh.skb_queue); 653 654 ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; 655 ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; 656 ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; 657 ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; 658 ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; 659 ifmsh->mshcfg.auto_open_plinks = true; 660 ifmsh->mshcfg.dot11MeshMaxPeerLinks = 661 MESH_MAX_ESTAB_PLINKS; 662 ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = 663 MESH_PATH_TIMEOUT; 664 ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = 665 MESH_PREQ_MIN_INT; 666 ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = 667 MESH_DIAM_TRAVERSAL_TIME; 668 ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = 669 MESH_MAX_PREQ_RETRIES; 670 ifmsh->mshcfg.path_refresh_time = 671 MESH_PATH_REFRESH_TIME; 672 ifmsh->mshcfg.min_discovery_timeout = 673 MESH_MIN_DISCOVERY_TIMEOUT; 674 ifmsh->accepting_plinks = true; 675 ifmsh->preq_id = 0; 676 ifmsh->dsn = 0; 677 atomic_set(&ifmsh->mpaths, 0); 678 mesh_rmc_init(sdata); 679 ifmsh->last_preq = jiffies; 680 /* Allocate all mesh structures when creating the first mesh interface. */ 681 if (!mesh_allocated) 682 ieee80211s_init(); 683 mesh_ids_set_default(ifmsh); 684 setup_timer(&ifmsh->mesh_path_timer, 685 ieee80211_mesh_path_timer, 686 (unsigned long) sdata); 687 INIT_LIST_HEAD(&ifmsh->preq_queue.list); 688 spin_lock_init(&ifmsh->mesh_preq_queue_lock); 689 } 690 691 ieee80211_rx_result 692 ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) 693 { 694 struct ieee80211_local *local = sdata->local; 695 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 696 struct ieee80211_mgmt *mgmt; 697 u16 fc; 698 699 if (skb->len < 24) 700 return RX_DROP_MONITOR; 701 702 mgmt = (struct ieee80211_mgmt *) skb->data; 703 fc = le16_to_cpu(mgmt->frame_control); 704 705 switch (fc & IEEE80211_FCTL_STYPE) { 706 case IEEE80211_STYPE_ACTION: 707 if (skb->len < IEEE80211_MIN_ACTION_SIZE) 708 return RX_DROP_MONITOR; 709 /* fall through */ 710 case IEEE80211_STYPE_PROBE_RESP: 711 case IEEE80211_STYPE_BEACON: 712 skb_queue_tail(&ifmsh->skb_queue, skb); 713 ieee80211_queue_work(&local->hw, &ifmsh->work); 714 return RX_QUEUED; 715 } 716 717 return RX_CONTINUE; 718 } 719