2 * Copyright (c) 2008, 2009 open80211s Ltd.
3 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
4 * Javier Cardona <javier@cozybit.com>
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.
11 #include <linux/slab.h>
12 #include <asm/unaligned.h>
13 #include "ieee80211_i.h"
15 #include "driver-ops.h"
17 static int mesh_allocated;
18 static struct kmem_cache *rm_cache;
20 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
22 return (mgmt->u.action.u.mesh_action.action_code ==
23 WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
26 void ieee80211s_init(void)
29 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
33 void ieee80211s_stop(void)
37 kmem_cache_destroy(rm_cache);
40 static void ieee80211_mesh_housekeeping_timer(unsigned long data)
42 struct ieee80211_sub_if_data *sdata = (void *) data;
43 struct ieee80211_local *local = sdata->local;
44 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
46 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
48 ieee80211_queue_work(&local->hw, &sdata->work);
52 * mesh_matches_local - check if the config of a mesh point matches ours
54 * @sdata: local mesh subif
55 * @ie: information elements of a management frame from the mesh peer
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.
60 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
61 struct ieee802_11_elems *ie)
63 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
65 struct cfg80211_chan_def sta_chan_def;
68 * As support for each feature is added, check for matching
69 * - On mesh config capabilities
70 * - Power Save Support En
71 * - Sync support enabled
72 * - Sync support active
73 * - Sync support required from peer
75 * - Power management control on fc
77 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
78 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
79 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
80 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
81 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
82 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
83 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
86 ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata),
89 if (sdata->vif.bss_conf.basic_rates != basic_rates)
92 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
94 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
95 ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def);
97 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
105 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
107 * @ie: information elements of a management frame from the mesh peer
109 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
111 return (ie->mesh_config->meshconf_cap &
112 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
116 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
118 * @sdata: mesh interface in which mesh beacons are going to be updated
120 * Returns: beacon changed flag if the beacon content changed.
122 u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
127 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
128 * the mesh interface might be able to establish plinks with peers that
129 * are already on the table but are not on PLINK_ESTAB state. However,
130 * in general the mesh interface is not accepting peer link requests
131 * from new peers, and that must be reflected in the beacon
133 free_plinks = mesh_plink_availables(sdata);
135 if (free_plinks != sdata->u.mesh.accepting_plinks) {
136 sdata->u.mesh.accepting_plinks = free_plinks;
137 changed = BSS_CHANGED_BEACON;
144 * mesh_sta_cleanup - clean up any mesh sta state
146 * @sta: mesh sta to clean up.
148 void mesh_sta_cleanup(struct sta_info *sta)
150 struct ieee80211_sub_if_data *sdata = sta->sdata;
154 * maybe userspace handles peer allocation and peering, but in either
155 * case the beacon is still generated by the kernel and we might need
158 if (sdata->u.mesh.user_mpm &&
159 sta->mesh->plink_state == NL80211_PLINK_ESTAB)
160 changed |= mesh_plink_dec_estab_count(sdata);
161 changed |= mesh_accept_plinks_update(sdata);
162 if (!sdata->u.mesh.user_mpm) {
163 changed |= mesh_plink_deactivate(sta);
164 del_timer_sync(&sta->mesh->plink_timer);
167 /* make sure no readers can access nexthop sta from here on */
168 mesh_path_flush_by_nexthop(sta);
172 ieee80211_mbss_info_change_notify(sdata, changed);
175 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
179 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
180 if (!sdata->u.mesh.rmc)
182 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
183 for (i = 0; i < RMC_BUCKETS; i++)
184 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
188 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
190 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
192 struct hlist_node *n;
195 if (!sdata->u.mesh.rmc)
198 for (i = 0; i < RMC_BUCKETS; i++) {
199 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
201 kmem_cache_free(rm_cache, p);
206 sdata->u.mesh.rmc = NULL;
210 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
213 * @sa: source address
214 * @mesh_hdr: mesh_header
216 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
218 * Checks using the source address and the mesh sequence number if we have
219 * received this frame lately. If the frame is not in the cache, it is added to
222 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
223 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
225 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
230 struct hlist_node *n;
235 /* Don't care about endianness since only match matters */
236 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
237 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
238 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
240 if (time_after(jiffies, p->exp_time) ||
241 entries == RMC_QUEUE_MAX_LEN) {
243 kmem_cache_free(rm_cache, p);
245 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
249 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
254 p->exp_time = jiffies + RMC_TIMEOUT;
255 memcpy(p->sa, sa, ETH_ALEN);
256 hlist_add_head(&p->list, &rmc->bucket[idx]);
260 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
263 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
265 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
267 if (skb_tailroom(skb) < 2 + meshconf_len)
270 pos = skb_put(skb, 2 + meshconf_len);
271 *pos++ = WLAN_EID_MESH_CONFIG;
272 *pos++ = meshconf_len;
274 /* save a pointer for quick updates in pre-tbtt */
275 ifmsh->meshconf_offset = pos - skb->data;
277 /* Active path selection protocol ID */
278 *pos++ = ifmsh->mesh_pp_id;
279 /* Active path selection metric ID */
280 *pos++ = ifmsh->mesh_pm_id;
281 /* Congestion control mode identifier */
282 *pos++ = ifmsh->mesh_cc_id;
283 /* Synchronization protocol identifier */
284 *pos++ = ifmsh->mesh_sp_id;
285 /* Authentication Protocol identifier */
286 *pos++ = ifmsh->mesh_auth_id;
287 /* Mesh Formation Info - number of neighbors */
288 neighbors = atomic_read(&ifmsh->estab_plinks);
289 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
290 *pos++ = neighbors << 1;
291 /* Mesh capability */
293 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
294 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
295 *pos |= ifmsh->accepting_plinks ?
296 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
297 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
298 *pos |= ifmsh->ps_peers_deep_sleep ?
299 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
300 *pos++ |= ifmsh->adjusting_tbtt ?
301 IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
307 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
309 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
312 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
315 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
316 *pos++ = WLAN_EID_MESH_ID;
317 *pos++ = ifmsh->mesh_id_len;
318 if (ifmsh->mesh_id_len)
319 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
324 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
327 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
330 /* see IEEE802.11-2012 13.14.6 */
331 if (ifmsh->ps_peers_light_sleep == 0 &&
332 ifmsh->ps_peers_deep_sleep == 0 &&
333 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
336 if (skb_tailroom(skb) < 4)
339 pos = skb_put(skb, 2 + 2);
340 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
342 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
347 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
350 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
354 if (!ifmsh->ie || !ifmsh->ie_len)
357 /* fast-forward to vendor IEs */
358 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
361 len = ifmsh->ie_len - offset;
362 data = ifmsh->ie + offset;
363 if (skb_tailroom(skb) < len)
365 memcpy(skb_put(skb, len), data, len);
371 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
373 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
377 if (!ifmsh->ie || !ifmsh->ie_len)
381 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
387 if (skb_tailroom(skb) < len)
389 memcpy(skb_put(skb, len), data, len);
394 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
397 struct ieee80211_chanctx_conf *chanctx_conf;
398 struct ieee80211_channel *chan;
401 if (skb_tailroom(skb) < 3)
405 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
406 if (WARN_ON(!chanctx_conf)) {
410 chan = chanctx_conf->def.chan;
413 pos = skb_put(skb, 2 + 1);
414 *pos++ = WLAN_EID_DS_PARAMS;
416 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
421 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
424 struct ieee80211_local *local = sdata->local;
425 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
426 struct ieee80211_supported_band *sband;
429 sband = local->hw.wiphy->bands[band];
430 if (!sband->ht_cap.ht_supported ||
431 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
432 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
433 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
436 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
439 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
440 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
445 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
448 struct ieee80211_local *local = sdata->local;
449 struct ieee80211_chanctx_conf *chanctx_conf;
450 struct ieee80211_channel *channel;
451 struct ieee80211_supported_band *sband;
452 struct ieee80211_sta_ht_cap *ht_cap;
456 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
457 if (WARN_ON(!chanctx_conf)) {
461 channel = chanctx_conf->def.chan;
464 sband = local->hw.wiphy->bands[channel->band];
465 ht_cap = &sband->ht_cap;
467 if (!ht_cap->ht_supported ||
468 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
469 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
470 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
473 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
476 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
477 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
478 sdata->vif.bss_conf.ht_operation_mode,
484 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
487 struct ieee80211_local *local = sdata->local;
488 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
489 struct ieee80211_supported_band *sband;
492 sband = local->hw.wiphy->bands[band];
493 if (!sband->vht_cap.vht_supported ||
494 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
495 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
496 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
499 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
502 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
503 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
508 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
511 struct ieee80211_local *local = sdata->local;
512 struct ieee80211_chanctx_conf *chanctx_conf;
513 struct ieee80211_channel *channel;
514 struct ieee80211_supported_band *sband;
515 struct ieee80211_sta_vht_cap *vht_cap;
519 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
520 if (WARN_ON(!chanctx_conf)) {
524 channel = chanctx_conf->def.chan;
527 sband = local->hw.wiphy->bands[channel->band];
528 vht_cap = &sband->vht_cap;
530 if (!vht_cap->vht_supported ||
531 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
532 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
533 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
536 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
539 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
540 ieee80211_ie_build_vht_oper(pos, vht_cap,
541 &sdata->vif.bss_conf.chandef);
546 static void ieee80211_mesh_path_timer(unsigned long data)
548 struct ieee80211_sub_if_data *sdata =
549 (struct ieee80211_sub_if_data *) data;
551 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
554 static void ieee80211_mesh_path_root_timer(unsigned long data)
556 struct ieee80211_sub_if_data *sdata =
557 (struct ieee80211_sub_if_data *) data;
558 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
560 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
562 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
565 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
567 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
568 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
570 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
571 /* stop running timer */
572 del_timer_sync(&ifmsh->mesh_path_root_timer);
577 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
578 * @hdr: 802.11 frame header
579 * @fc: frame control field
580 * @meshda: destination address in the mesh
581 * @meshsa: source address address in the mesh. Same as TA, as frame is
582 * locally originated.
584 * Return the length of the 802.11 (does not include a mesh control header)
586 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
587 const u8 *meshda, const u8 *meshsa)
589 if (is_multicast_ether_addr(meshda)) {
590 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
592 memcpy(hdr->addr1, meshda, ETH_ALEN);
593 memcpy(hdr->addr2, meshsa, ETH_ALEN);
594 memcpy(hdr->addr3, meshsa, ETH_ALEN);
597 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
599 eth_zero_addr(hdr->addr1); /* RA is resolved later */
600 memcpy(hdr->addr2, meshsa, ETH_ALEN);
601 memcpy(hdr->addr3, meshda, ETH_ALEN);
602 memcpy(hdr->addr4, meshsa, ETH_ALEN);
608 * ieee80211_new_mesh_header - create a new mesh header
609 * @sdata: mesh interface to be used
610 * @meshhdr: uninitialized mesh header
611 * @addr4or5: 1st address in the ae header, which may correspond to address 4
612 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
614 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
617 * Return the header length.
619 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
620 struct ieee80211s_hdr *meshhdr,
621 const char *addr4or5, const char *addr6)
623 if (WARN_ON(!addr4or5 && addr6))
626 memset(meshhdr, 0, sizeof(*meshhdr));
628 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
630 /* FIXME: racy -- TX on multiple queues can be concurrent */
631 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
632 sdata->u.mesh.mesh_seqnum++;
634 if (addr4or5 && !addr6) {
635 meshhdr->flags |= MESH_FLAGS_AE_A4;
636 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
638 } else if (addr4or5 && addr6) {
639 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
640 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
641 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
648 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
650 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
653 if (ifmsh->mshcfg.plink_timeout > 0)
654 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
655 mesh_path_expire(sdata);
657 changed = mesh_accept_plinks_update(sdata);
658 ieee80211_mbss_info_change_notify(sdata, changed);
660 mod_timer(&ifmsh->housekeeping_timer,
661 round_jiffies(jiffies +
662 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
665 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
667 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
670 mesh_path_tx_root_frame(sdata);
672 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
673 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
675 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
677 mod_timer(&ifmsh->mesh_path_root_timer,
678 round_jiffies(TU_TO_EXP_TIME(interval)));
682 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
684 struct beacon_data *bcn;
685 int head_len, tail_len;
687 struct ieee80211_mgmt *mgmt;
688 struct ieee80211_chanctx_conf *chanctx_conf;
689 struct mesh_csa_settings *csa;
690 enum nl80211_band band;
692 struct ieee80211_sub_if_data *sdata;
693 int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
694 sizeof(mgmt->u.beacon);
696 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
698 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
699 band = chanctx_conf->def.chan->band;
704 /* Channel Switch Announcement */
705 2 + sizeof(struct ieee80211_channel_sw_ie) +
706 /* Mesh Channel Swith Parameters */
707 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
708 2 + 8 + /* supported rates */
709 2 + 3; /* DS params */
710 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
711 2 + sizeof(struct ieee80211_ht_cap) +
712 2 + sizeof(struct ieee80211_ht_operation) +
713 2 + ifmsh->mesh_id_len +
714 2 + sizeof(struct ieee80211_meshconf_ie) +
715 2 + sizeof(__le16) + /* awake window */
716 2 + sizeof(struct ieee80211_vht_cap) +
717 2 + sizeof(struct ieee80211_vht_operation) +
720 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
721 /* need an skb for IE builders to operate on */
722 skb = dev_alloc_skb(max(head_len, tail_len));
728 * pointers go into the block we allocated,
729 * memory is | beacon_data | head | tail |
731 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
733 /* fill in the head */
734 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
735 memset(mgmt, 0, hdr_len);
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_BEACON);
738 eth_broadcast_addr(mgmt->da);
739 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
740 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
741 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
742 mgmt->u.beacon.beacon_int =
743 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
744 mgmt->u.beacon.capab_info |= cpu_to_le16(
745 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
747 pos = skb_put(skb, 2);
748 *pos++ = WLAN_EID_SSID;
752 csa = rcu_dereference(ifmsh->csa);
754 pos = skb_put(skb, 13);
756 *pos++ = WLAN_EID_CHANNEL_SWITCH;
759 *pos++ = ieee80211_frequency_to_channel(
760 csa->settings.chandef.chan->center_freq);
761 bcn->csa_current_counter = csa->settings.count;
762 bcn->csa_counter_offsets[0] = hdr_len + 6;
763 *pos++ = csa->settings.count;
764 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
766 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
767 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
768 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
770 *pos++ = ifmsh->chsw_ttl;
772 *pos++ |= csa->settings.block_tx ?
773 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
774 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
776 put_unaligned_le16(ifmsh->pre_value, pos);
781 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
782 mesh_add_ds_params_ie(sdata, skb))
785 bcn->head_len = skb->len;
786 memcpy(bcn->head, skb->data, bcn->head_len);
790 bcn->tail = bcn->head + bcn->head_len;
792 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
793 mesh_add_rsn_ie(sdata, skb) ||
794 mesh_add_ht_cap_ie(sdata, skb) ||
795 mesh_add_ht_oper_ie(sdata, skb) ||
796 mesh_add_meshid_ie(sdata, skb) ||
797 mesh_add_meshconf_ie(sdata, skb) ||
798 mesh_add_awake_window_ie(sdata, skb) ||
799 mesh_add_vht_cap_ie(sdata, skb) ||
800 mesh_add_vht_oper_ie(sdata, skb) ||
801 mesh_add_vendor_ies(sdata, skb))
804 bcn->tail_len = skb->len;
805 memcpy(bcn->tail, skb->data, bcn->tail_len);
806 bcn->meshconf = (struct ieee80211_meshconf_ie *)
807 (bcn->tail + ifmsh->meshconf_offset);
810 rcu_assign_pointer(ifmsh->beacon, bcn);
819 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
821 struct beacon_data *old_bcn;
824 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
825 lockdep_is_held(&sdata->wdev.mtx));
826 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
828 /* just reuse old beacon */
832 kfree_rcu(old_bcn, rcu_head);
836 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
839 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
840 unsigned long bits = changed;
846 /* if we race with running work, worst case this work becomes a noop */
847 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
848 set_bit(bit, &ifmsh->mbss_changed);
849 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
850 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
853 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
855 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
856 struct ieee80211_local *local = sdata->local;
857 u32 changed = BSS_CHANGED_BEACON |
858 BSS_CHANGED_BEACON_ENABLED |
860 BSS_CHANGED_BASIC_RATES |
861 BSS_CHANGED_BEACON_INT;
863 local->fif_other_bss++;
864 /* mesh ifaces must set allmulti to forward mcast traffic */
865 atomic_inc(&local->iff_allmultis);
866 ieee80211_configure_filter(local);
868 ifmsh->mesh_cc_id = 0; /* Disabled */
869 /* register sync ops from extensible synchronization framework */
870 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
871 ifmsh->adjusting_tbtt = false;
872 ifmsh->sync_offset_clockdrift_max = 0;
873 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
874 ieee80211_mesh_root_setup(ifmsh);
875 ieee80211_queue_work(&local->hw, &sdata->work);
876 sdata->vif.bss_conf.ht_operation_mode =
877 ifmsh->mshcfg.ht_opmode;
878 sdata->vif.bss_conf.enable_beacon = true;
880 changed |= ieee80211_mps_local_status_update(sdata);
882 if (ieee80211_mesh_build_beacon(ifmsh)) {
883 ieee80211_stop_mesh(sdata);
887 ieee80211_recalc_dtim(local, sdata);
888 ieee80211_bss_info_change_notify(sdata, changed);
890 netif_carrier_on(sdata->dev);
894 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
896 struct ieee80211_local *local = sdata->local;
897 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
898 struct beacon_data *bcn;
900 netif_carrier_off(sdata->dev);
902 /* stop the beacon */
903 ifmsh->mesh_id_len = 0;
904 sdata->vif.bss_conf.enable_beacon = false;
905 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
906 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
907 bcn = rcu_dereference_protected(ifmsh->beacon,
908 lockdep_is_held(&sdata->wdev.mtx));
909 RCU_INIT_POINTER(ifmsh->beacon, NULL);
910 kfree_rcu(bcn, rcu_head);
912 /* flush STAs and mpaths on this iface */
913 sta_info_flush(sdata);
914 mesh_path_flush_by_iface(sdata);
916 /* free all potentially still buffered group-addressed frames */
917 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
918 skb_queue_purge(&ifmsh->ps.bc_buf);
920 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
921 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
922 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
924 /* clear any mesh work (for next join) we may have accrued */
925 ifmsh->wrkq_flags = 0;
926 ifmsh->mbss_changed = 0;
928 local->fif_other_bss--;
929 atomic_dec(&local->iff_allmultis);
930 ieee80211_configure_filter(local);
934 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
935 struct ieee802_11_elems *elems, bool beacon)
937 struct cfg80211_csa_settings params;
938 struct ieee80211_csa_ie csa_ie;
939 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
940 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
944 sdata_assert_lock(sdata);
946 sta_flags = IEEE80211_STA_DISABLE_VHT;
947 switch (sdata->vif.bss_conf.chandef.width) {
948 case NL80211_CHAN_WIDTH_20_NOHT:
949 sta_flags |= IEEE80211_STA_DISABLE_HT;
950 case NL80211_CHAN_WIDTH_20:
951 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
957 memset(¶ms, 0, sizeof(params));
958 memset(&csa_ie, 0, sizeof(csa_ie));
959 err = ieee80211_parse_ch_switch_ie(sdata, elems, band,
960 sta_flags, sdata->vif.addr,
967 params.chandef = csa_ie.chandef;
968 params.count = csa_ie.count;
970 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
971 IEEE80211_CHAN_DISABLED)) {
973 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
975 params.chandef.chan->center_freq,
976 params.chandef.width,
977 params.chandef.center_freq1,
978 params.chandef.center_freq2);
982 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
984 NL80211_IFTYPE_MESH_POINT);
988 /* TODO: DFS not (yet) supported */
991 params.radar_required = err;
993 if (cfg80211_chandef_identical(¶ms.chandef,
994 &sdata->vif.bss_conf.chandef)) {
996 "received csa with an identical chandef, ignoring\n");
1001 "received channel switch announcement to go to channel %d MHz\n",
1002 params.chandef.chan->center_freq);
1004 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1006 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1007 if (ifmsh->pre_value >= csa_ie.pre_value)
1009 ifmsh->pre_value = csa_ie.pre_value;
1012 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1015 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1017 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1025 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1026 struct ieee80211_mgmt *mgmt, size_t len)
1028 struct ieee80211_local *local = sdata->local;
1029 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1030 struct sk_buff *presp;
1031 struct beacon_data *bcn;
1032 struct ieee80211_mgmt *hdr;
1033 struct ieee802_11_elems elems;
1037 pos = mgmt->u.probe_req.variable;
1038 baselen = (u8 *) pos - (u8 *) mgmt;
1042 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1047 /* 802.11-2012 10.1.4.3.2 */
1048 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1049 !is_broadcast_ether_addr(mgmt->da)) ||
1050 elems.ssid_len != 0)
1053 if (elems.mesh_id_len != 0 &&
1054 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1055 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1059 bcn = rcu_dereference(ifmsh->beacon);
1064 presp = dev_alloc_skb(local->tx_headroom +
1065 bcn->head_len + bcn->tail_len);
1069 skb_reserve(presp, local->tx_headroom);
1070 memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
1071 memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
1072 hdr = (struct ieee80211_mgmt *) presp->data;
1073 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1074 IEEE80211_STYPE_PROBE_RESP);
1075 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1076 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1077 ieee80211_tx_skb(sdata, presp);
1082 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1084 struct ieee80211_mgmt *mgmt,
1086 struct ieee80211_rx_status *rx_status)
1088 struct ieee80211_local *local = sdata->local;
1089 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1090 struct ieee802_11_elems elems;
1091 struct ieee80211_channel *channel;
1094 enum nl80211_band band = rx_status->band;
1096 /* ignore ProbeResp to foreign address */
1097 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1098 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1101 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1105 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1108 /* ignore non-mesh or secure / unsecure mismatch */
1109 if ((!elems.mesh_id || !elems.mesh_config) ||
1110 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1111 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1114 if (elems.ds_params)
1115 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1117 freq = rx_status->freq;
1119 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1121 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1124 if (mesh_matches_local(sdata, &elems))
1125 mesh_neighbour_update(sdata, mgmt->sa, &elems);
1127 if (ifmsh->sync_ops)
1128 ifmsh->sync_ops->rx_bcn_presp(sdata,
1129 stype, mgmt, &elems, rx_status);
1131 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1132 !sdata->vif.csa_active)
1133 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1136 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1138 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1139 struct mesh_csa_settings *tmp_csa_settings;
1143 /* Reset the TTL value and Initiator flag */
1144 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1145 ifmsh->chsw_ttl = 0;
1147 /* Remove the CSA and MCSP elements from the beacon */
1148 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1149 RCU_INIT_POINTER(ifmsh->csa, NULL);
1150 if (tmp_csa_settings)
1151 kfree_rcu(tmp_csa_settings, rcu_head);
1152 ret = ieee80211_mesh_rebuild_beacon(sdata);
1156 changed |= BSS_CHANGED_BEACON;
1158 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1159 sdata->vif.bss_conf.chandef.chan->center_freq);
1163 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1164 struct cfg80211_csa_settings *csa_settings)
1166 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1167 struct mesh_csa_settings *tmp_csa_settings;
1170 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1172 if (!tmp_csa_settings)
1175 memcpy(&tmp_csa_settings->settings, csa_settings,
1176 sizeof(struct cfg80211_csa_settings));
1178 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1180 ret = ieee80211_mesh_rebuild_beacon(sdata);
1182 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1183 RCU_INIT_POINTER(ifmsh->csa, NULL);
1184 kfree_rcu(tmp_csa_settings, rcu_head);
1188 return BSS_CHANGED_BEACON;
1191 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1192 struct ieee80211_mgmt *mgmt, size_t len)
1194 struct ieee80211_mgmt *mgmt_fwd;
1195 struct sk_buff *skb;
1196 struct ieee80211_local *local = sdata->local;
1197 u8 *pos = mgmt->u.action.u.chan_switch.variable;
1200 skb = dev_alloc_skb(local->tx_headroom + len);
1203 skb_reserve(skb, local->tx_headroom);
1204 mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
1206 /* offset_ttl is based on whether the secondary channel
1207 * offset is available or not. Subtract 1 from the mesh TTL
1208 * and disable the initiator flag before forwarding.
1210 offset_ttl = (len < 42) ? 7 : 10;
1211 *(pos + offset_ttl) -= 1;
1212 *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1214 memcpy(mgmt_fwd, mgmt, len);
1215 eth_broadcast_addr(mgmt_fwd->da);
1216 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1217 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1219 ieee80211_tx_skb(sdata, skb);
1223 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1224 struct ieee80211_mgmt *mgmt, size_t len)
1226 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1227 struct ieee802_11_elems elems;
1229 bool fwd_csa = true;
1233 if (mgmt->u.action.u.measurement.action_code !=
1234 WLAN_ACTION_SPCT_CHL_SWITCH)
1237 pos = mgmt->u.action.u.chan_switch.variable;
1238 baselen = offsetof(struct ieee80211_mgmt,
1239 u.action.u.chan_switch.variable);
1240 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1242 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1243 if (!--ifmsh->chsw_ttl)
1246 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1247 if (ifmsh->pre_value >= pre_value)
1250 ifmsh->pre_value = pre_value;
1252 if (!sdata->vif.csa_active &&
1253 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1254 mcsa_dbg(sdata, "Failed to process CSA action frame");
1258 /* forward or re-broadcast the CSA frame */
1260 if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0)
1261 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1265 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1266 struct ieee80211_mgmt *mgmt,
1268 struct ieee80211_rx_status *rx_status)
1270 switch (mgmt->u.action.category) {
1271 case WLAN_CATEGORY_SELF_PROTECTED:
1272 switch (mgmt->u.action.u.self_prot.action_code) {
1273 case WLAN_SP_MESH_PEERING_OPEN:
1274 case WLAN_SP_MESH_PEERING_CLOSE:
1275 case WLAN_SP_MESH_PEERING_CONFIRM:
1276 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1280 case WLAN_CATEGORY_MESH_ACTION:
1281 if (mesh_action_is_path_sel(mgmt))
1282 mesh_rx_path_sel_frame(sdata, mgmt, len);
1284 case WLAN_CATEGORY_SPECTRUM_MGMT:
1285 mesh_rx_csa_frame(sdata, mgmt, len);
1290 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1291 struct sk_buff *skb)
1293 struct ieee80211_rx_status *rx_status;
1294 struct ieee80211_mgmt *mgmt;
1299 /* mesh already went down */
1300 if (!sdata->u.mesh.mesh_id_len)
1303 rx_status = IEEE80211_SKB_RXCB(skb);
1304 mgmt = (struct ieee80211_mgmt *) skb->data;
1305 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1308 case IEEE80211_STYPE_PROBE_RESP:
1309 case IEEE80211_STYPE_BEACON:
1310 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1313 case IEEE80211_STYPE_PROBE_REQ:
1314 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1316 case IEEE80211_STYPE_ACTION:
1317 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1321 sdata_unlock(sdata);
1324 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1326 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1327 u32 bit, changed = 0;
1329 for_each_set_bit(bit, &ifmsh->mbss_changed,
1330 sizeof(changed) * BITS_PER_BYTE) {
1331 clear_bit(bit, &ifmsh->mbss_changed);
1332 changed |= BIT(bit);
1335 if (sdata->vif.bss_conf.enable_beacon &&
1336 (changed & (BSS_CHANGED_BEACON |
1338 BSS_CHANGED_BASIC_RATES |
1339 BSS_CHANGED_BEACON_INT)))
1340 if (ieee80211_mesh_rebuild_beacon(sdata))
1343 ieee80211_bss_info_change_notify(sdata, changed);
1346 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1348 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1352 /* mesh already went down */
1353 if (!sdata->u.mesh.mesh_id_len)
1356 if (ifmsh->preq_queue_len &&
1358 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1359 mesh_path_start_discovery(sdata);
1361 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1362 ieee80211_mesh_housekeeping(sdata);
1364 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1365 ieee80211_mesh_rootpath(sdata);
1367 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1368 mesh_sync_adjust_tbtt(sdata);
1370 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1371 mesh_bss_info_changed(sdata);
1373 sdata_unlock(sdata);
1377 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1379 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1380 static u8 zero_addr[ETH_ALEN] = {};
1382 setup_timer(&ifmsh->housekeeping_timer,
1383 ieee80211_mesh_housekeeping_timer,
1384 (unsigned long) sdata);
1386 ifmsh->accepting_plinks = true;
1387 atomic_set(&ifmsh->mpaths, 0);
1388 mesh_rmc_init(sdata);
1389 ifmsh->last_preq = jiffies;
1390 ifmsh->next_perr = jiffies;
1391 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1392 /* Allocate all mesh structures when creating the first mesh interface. */
1393 if (!mesh_allocated)
1396 mesh_pathtbl_init(sdata);
1398 setup_timer(&ifmsh->mesh_path_timer,
1399 ieee80211_mesh_path_timer,
1400 (unsigned long) sdata);
1401 setup_timer(&ifmsh->mesh_path_root_timer,
1402 ieee80211_mesh_path_root_timer,
1403 (unsigned long) sdata);
1404 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1405 skb_queue_head_init(&ifmsh->ps.bc_buf);
1406 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1407 spin_lock_init(&ifmsh->sync_offset_lock);
1408 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1410 sdata->vif.bss_conf.bssid = zero_addr;
1413 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1415 mesh_rmc_free(sdata);
1416 mesh_pathtbl_unregister(sdata);