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 changed = mesh_accept_plinks_update(sdata);
159 if (!sdata->u.mesh.user_mpm) {
160 changed |= mesh_plink_deactivate(sta);
161 del_timer_sync(&sta->mesh->plink_timer);
164 /* make sure no readers can access nexthop sta from here on */
165 mesh_path_flush_by_nexthop(sta);
169 ieee80211_mbss_info_change_notify(sdata, changed);
172 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
176 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
177 if (!sdata->u.mesh.rmc)
179 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
180 for (i = 0; i < RMC_BUCKETS; i++)
181 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
185 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
187 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
189 struct hlist_node *n;
192 if (!sdata->u.mesh.rmc)
195 for (i = 0; i < RMC_BUCKETS; i++) {
196 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
198 kmem_cache_free(rm_cache, p);
203 sdata->u.mesh.rmc = NULL;
207 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
210 * @sa: source address
211 * @mesh_hdr: mesh_header
213 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
215 * Checks using the source address and the mesh sequence number if we have
216 * received this frame lately. If the frame is not in the cache, it is added to
219 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
220 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
222 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
227 struct hlist_node *n;
232 /* Don't care about endianness since only match matters */
233 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
234 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
235 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
237 if (time_after(jiffies, p->exp_time) ||
238 entries == RMC_QUEUE_MAX_LEN) {
240 kmem_cache_free(rm_cache, p);
242 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
246 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
251 p->exp_time = jiffies + RMC_TIMEOUT;
252 memcpy(p->sa, sa, ETH_ALEN);
253 hlist_add_head(&p->list, &rmc->bucket[idx]);
257 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
260 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
262 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
264 if (skb_tailroom(skb) < 2 + meshconf_len)
267 pos = skb_put(skb, 2 + meshconf_len);
268 *pos++ = WLAN_EID_MESH_CONFIG;
269 *pos++ = meshconf_len;
271 /* save a pointer for quick updates in pre-tbtt */
272 ifmsh->meshconf_offset = pos - skb->data;
274 /* Active path selection protocol ID */
275 *pos++ = ifmsh->mesh_pp_id;
276 /* Active path selection metric ID */
277 *pos++ = ifmsh->mesh_pm_id;
278 /* Congestion control mode identifier */
279 *pos++ = ifmsh->mesh_cc_id;
280 /* Synchronization protocol identifier */
281 *pos++ = ifmsh->mesh_sp_id;
282 /* Authentication Protocol identifier */
283 *pos++ = ifmsh->mesh_auth_id;
284 /* Mesh Formation Info - number of neighbors */
285 neighbors = atomic_read(&ifmsh->estab_plinks);
286 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
287 *pos++ = neighbors << 1;
288 /* Mesh capability */
290 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
291 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
292 *pos |= ifmsh->accepting_plinks ?
293 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
294 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
295 *pos |= ifmsh->ps_peers_deep_sleep ?
296 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
297 *pos++ |= ifmsh->adjusting_tbtt ?
298 IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
304 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
306 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
309 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
312 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
313 *pos++ = WLAN_EID_MESH_ID;
314 *pos++ = ifmsh->mesh_id_len;
315 if (ifmsh->mesh_id_len)
316 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
321 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
324 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
327 /* see IEEE802.11-2012 13.14.6 */
328 if (ifmsh->ps_peers_light_sleep == 0 &&
329 ifmsh->ps_peers_deep_sleep == 0 &&
330 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
333 if (skb_tailroom(skb) < 4)
336 pos = skb_put(skb, 2 + 2);
337 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
339 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
344 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
347 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
351 if (!ifmsh->ie || !ifmsh->ie_len)
354 /* fast-forward to vendor IEs */
355 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
358 len = ifmsh->ie_len - offset;
359 data = ifmsh->ie + offset;
360 if (skb_tailroom(skb) < len)
362 memcpy(skb_put(skb, len), data, len);
368 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
370 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
374 if (!ifmsh->ie || !ifmsh->ie_len)
378 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
384 if (skb_tailroom(skb) < len)
386 memcpy(skb_put(skb, len), data, len);
391 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
394 struct ieee80211_chanctx_conf *chanctx_conf;
395 struct ieee80211_channel *chan;
398 if (skb_tailroom(skb) < 3)
402 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
403 if (WARN_ON(!chanctx_conf)) {
407 chan = chanctx_conf->def.chan;
410 pos = skb_put(skb, 2 + 1);
411 *pos++ = WLAN_EID_DS_PARAMS;
413 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
418 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
421 struct ieee80211_local *local = sdata->local;
422 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
423 struct ieee80211_supported_band *sband;
426 sband = local->hw.wiphy->bands[band];
427 if (!sband->ht_cap.ht_supported ||
428 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
429 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
430 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
433 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
436 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
437 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
442 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
445 struct ieee80211_local *local = sdata->local;
446 struct ieee80211_chanctx_conf *chanctx_conf;
447 struct ieee80211_channel *channel;
448 struct ieee80211_supported_band *sband;
449 struct ieee80211_sta_ht_cap *ht_cap;
453 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
454 if (WARN_ON(!chanctx_conf)) {
458 channel = chanctx_conf->def.chan;
461 sband = local->hw.wiphy->bands[channel->band];
462 ht_cap = &sband->ht_cap;
464 if (!ht_cap->ht_supported ||
465 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
466 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
467 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
470 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
473 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
474 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
475 sdata->vif.bss_conf.ht_operation_mode,
481 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
484 struct ieee80211_local *local = sdata->local;
485 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
486 struct ieee80211_supported_band *sband;
489 sband = local->hw.wiphy->bands[band];
490 if (!sband->vht_cap.vht_supported ||
491 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
492 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
493 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
496 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
499 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
500 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
505 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
508 struct ieee80211_local *local = sdata->local;
509 struct ieee80211_chanctx_conf *chanctx_conf;
510 struct ieee80211_channel *channel;
511 struct ieee80211_supported_band *sband;
512 struct ieee80211_sta_vht_cap *vht_cap;
516 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
517 if (WARN_ON(!chanctx_conf)) {
521 channel = chanctx_conf->def.chan;
524 sband = local->hw.wiphy->bands[channel->band];
525 vht_cap = &sband->vht_cap;
527 if (!vht_cap->vht_supported ||
528 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
529 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
530 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
533 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
536 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
537 ieee80211_ie_build_vht_oper(pos, vht_cap,
538 &sdata->vif.bss_conf.chandef);
543 static void ieee80211_mesh_path_timer(unsigned long data)
545 struct ieee80211_sub_if_data *sdata =
546 (struct ieee80211_sub_if_data *) data;
548 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
551 static void ieee80211_mesh_path_root_timer(unsigned long data)
553 struct ieee80211_sub_if_data *sdata =
554 (struct ieee80211_sub_if_data *) data;
555 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
557 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
559 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
562 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
564 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
565 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
567 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
568 /* stop running timer */
569 del_timer_sync(&ifmsh->mesh_path_root_timer);
574 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
575 * @hdr: 802.11 frame header
576 * @fc: frame control field
577 * @meshda: destination address in the mesh
578 * @meshsa: source address address in the mesh. Same as TA, as frame is
579 * locally originated.
581 * Return the length of the 802.11 (does not include a mesh control header)
583 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
584 const u8 *meshda, const u8 *meshsa)
586 if (is_multicast_ether_addr(meshda)) {
587 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
589 memcpy(hdr->addr1, meshda, ETH_ALEN);
590 memcpy(hdr->addr2, meshsa, ETH_ALEN);
591 memcpy(hdr->addr3, meshsa, ETH_ALEN);
594 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
596 eth_zero_addr(hdr->addr1); /* RA is resolved later */
597 memcpy(hdr->addr2, meshsa, ETH_ALEN);
598 memcpy(hdr->addr3, meshda, ETH_ALEN);
599 memcpy(hdr->addr4, meshsa, ETH_ALEN);
605 * ieee80211_new_mesh_header - create a new mesh header
606 * @sdata: mesh interface to be used
607 * @meshhdr: uninitialized mesh header
608 * @addr4or5: 1st address in the ae header, which may correspond to address 4
609 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
611 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
614 * Return the header length.
616 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
617 struct ieee80211s_hdr *meshhdr,
618 const char *addr4or5, const char *addr6)
620 if (WARN_ON(!addr4or5 && addr6))
623 memset(meshhdr, 0, sizeof(*meshhdr));
625 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
627 /* FIXME: racy -- TX on multiple queues can be concurrent */
628 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
629 sdata->u.mesh.mesh_seqnum++;
631 if (addr4or5 && !addr6) {
632 meshhdr->flags |= MESH_FLAGS_AE_A4;
633 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
635 } else if (addr4or5 && addr6) {
636 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
637 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
638 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
645 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
647 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
650 if (ifmsh->mshcfg.plink_timeout > 0)
651 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
652 mesh_path_expire(sdata);
654 changed = mesh_accept_plinks_update(sdata);
655 ieee80211_mbss_info_change_notify(sdata, changed);
657 mod_timer(&ifmsh->housekeeping_timer,
658 round_jiffies(jiffies +
659 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
662 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
664 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
667 mesh_path_tx_root_frame(sdata);
669 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
670 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
672 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
674 mod_timer(&ifmsh->mesh_path_root_timer,
675 round_jiffies(TU_TO_EXP_TIME(interval)));
679 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
681 struct beacon_data *bcn;
682 int head_len, tail_len;
684 struct ieee80211_mgmt *mgmt;
685 struct ieee80211_chanctx_conf *chanctx_conf;
686 struct mesh_csa_settings *csa;
687 enum nl80211_band band;
689 struct ieee80211_sub_if_data *sdata;
690 int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
691 sizeof(mgmt->u.beacon);
693 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
695 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
696 band = chanctx_conf->def.chan->band;
701 /* Channel Switch Announcement */
702 2 + sizeof(struct ieee80211_channel_sw_ie) +
703 /* Mesh Channel Swith Parameters */
704 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
705 2 + 8 + /* supported rates */
706 2 + 3; /* DS params */
707 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
708 2 + sizeof(struct ieee80211_ht_cap) +
709 2 + sizeof(struct ieee80211_ht_operation) +
710 2 + ifmsh->mesh_id_len +
711 2 + sizeof(struct ieee80211_meshconf_ie) +
712 2 + sizeof(__le16) + /* awake window */
713 2 + sizeof(struct ieee80211_vht_cap) +
714 2 + sizeof(struct ieee80211_vht_operation) +
717 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
718 /* need an skb for IE builders to operate on */
719 skb = dev_alloc_skb(max(head_len, tail_len));
725 * pointers go into the block we allocated,
726 * memory is | beacon_data | head | tail |
728 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
730 /* fill in the head */
731 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
732 memset(mgmt, 0, hdr_len);
733 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
734 IEEE80211_STYPE_BEACON);
735 eth_broadcast_addr(mgmt->da);
736 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
737 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
738 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
739 mgmt->u.beacon.beacon_int =
740 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
741 mgmt->u.beacon.capab_info |= cpu_to_le16(
742 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
744 pos = skb_put(skb, 2);
745 *pos++ = WLAN_EID_SSID;
749 csa = rcu_dereference(ifmsh->csa);
751 pos = skb_put(skb, 13);
753 *pos++ = WLAN_EID_CHANNEL_SWITCH;
756 *pos++ = ieee80211_frequency_to_channel(
757 csa->settings.chandef.chan->center_freq);
758 bcn->csa_current_counter = csa->settings.count;
759 bcn->csa_counter_offsets[0] = hdr_len + 6;
760 *pos++ = csa->settings.count;
761 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
763 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
764 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
765 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
767 *pos++ = ifmsh->chsw_ttl;
769 *pos++ |= csa->settings.block_tx ?
770 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
771 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
773 put_unaligned_le16(ifmsh->pre_value, pos);
778 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
779 mesh_add_ds_params_ie(sdata, skb))
782 bcn->head_len = skb->len;
783 memcpy(bcn->head, skb->data, bcn->head_len);
787 bcn->tail = bcn->head + bcn->head_len;
789 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
790 mesh_add_rsn_ie(sdata, skb) ||
791 mesh_add_ht_cap_ie(sdata, skb) ||
792 mesh_add_ht_oper_ie(sdata, skb) ||
793 mesh_add_meshid_ie(sdata, skb) ||
794 mesh_add_meshconf_ie(sdata, skb) ||
795 mesh_add_awake_window_ie(sdata, skb) ||
796 mesh_add_vht_cap_ie(sdata, skb) ||
797 mesh_add_vht_oper_ie(sdata, skb) ||
798 mesh_add_vendor_ies(sdata, skb))
801 bcn->tail_len = skb->len;
802 memcpy(bcn->tail, skb->data, bcn->tail_len);
803 bcn->meshconf = (struct ieee80211_meshconf_ie *)
804 (bcn->tail + ifmsh->meshconf_offset);
807 rcu_assign_pointer(ifmsh->beacon, bcn);
816 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
818 struct beacon_data *old_bcn;
821 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
822 lockdep_is_held(&sdata->wdev.mtx));
823 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
825 /* just reuse old beacon */
829 kfree_rcu(old_bcn, rcu_head);
833 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
836 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
837 unsigned long bits = changed;
843 /* if we race with running work, worst case this work becomes a noop */
844 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
845 set_bit(bit, &ifmsh->mbss_changed);
846 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
847 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
850 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
852 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
853 struct ieee80211_local *local = sdata->local;
854 u32 changed = BSS_CHANGED_BEACON |
855 BSS_CHANGED_BEACON_ENABLED |
857 BSS_CHANGED_BASIC_RATES |
858 BSS_CHANGED_BEACON_INT;
860 local->fif_other_bss++;
861 /* mesh ifaces must set allmulti to forward mcast traffic */
862 atomic_inc(&local->iff_allmultis);
863 ieee80211_configure_filter(local);
865 ifmsh->mesh_cc_id = 0; /* Disabled */
866 /* register sync ops from extensible synchronization framework */
867 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
868 ifmsh->adjusting_tbtt = false;
869 ifmsh->sync_offset_clockdrift_max = 0;
870 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
871 ieee80211_mesh_root_setup(ifmsh);
872 ieee80211_queue_work(&local->hw, &sdata->work);
873 sdata->vif.bss_conf.ht_operation_mode =
874 ifmsh->mshcfg.ht_opmode;
875 sdata->vif.bss_conf.enable_beacon = true;
877 changed |= ieee80211_mps_local_status_update(sdata);
879 if (ieee80211_mesh_build_beacon(ifmsh)) {
880 ieee80211_stop_mesh(sdata);
884 ieee80211_recalc_dtim(local, sdata);
885 ieee80211_bss_info_change_notify(sdata, changed);
887 netif_carrier_on(sdata->dev);
891 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
893 struct ieee80211_local *local = sdata->local;
894 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
895 struct beacon_data *bcn;
897 netif_carrier_off(sdata->dev);
899 /* stop the beacon */
900 ifmsh->mesh_id_len = 0;
901 sdata->vif.bss_conf.enable_beacon = false;
902 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
903 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
904 bcn = rcu_dereference_protected(ifmsh->beacon,
905 lockdep_is_held(&sdata->wdev.mtx));
906 RCU_INIT_POINTER(ifmsh->beacon, NULL);
907 kfree_rcu(bcn, rcu_head);
909 /* flush STAs and mpaths on this iface */
910 sta_info_flush(sdata);
911 mesh_path_flush_by_iface(sdata);
913 /* free all potentially still buffered group-addressed frames */
914 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
915 skb_queue_purge(&ifmsh->ps.bc_buf);
917 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
918 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
919 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
921 /* clear any mesh work (for next join) we may have accrued */
922 ifmsh->wrkq_flags = 0;
923 ifmsh->mbss_changed = 0;
925 local->fif_other_bss--;
926 atomic_dec(&local->iff_allmultis);
927 ieee80211_configure_filter(local);
931 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
932 struct ieee802_11_elems *elems, bool beacon)
934 struct cfg80211_csa_settings params;
935 struct ieee80211_csa_ie csa_ie;
936 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
937 enum nl80211_band band = ieee80211_get_sdata_band(sdata);
941 sdata_assert_lock(sdata);
943 sta_flags = IEEE80211_STA_DISABLE_VHT;
944 switch (sdata->vif.bss_conf.chandef.width) {
945 case NL80211_CHAN_WIDTH_20_NOHT:
946 sta_flags |= IEEE80211_STA_DISABLE_HT;
947 case NL80211_CHAN_WIDTH_20:
948 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
954 memset(¶ms, 0, sizeof(params));
955 memset(&csa_ie, 0, sizeof(csa_ie));
956 err = ieee80211_parse_ch_switch_ie(sdata, elems, band,
957 sta_flags, sdata->vif.addr,
964 params.chandef = csa_ie.chandef;
965 params.count = csa_ie.count;
967 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
968 IEEE80211_CHAN_DISABLED)) {
970 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
972 params.chandef.chan->center_freq,
973 params.chandef.width,
974 params.chandef.center_freq1,
975 params.chandef.center_freq2);
979 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
981 NL80211_IFTYPE_MESH_POINT);
985 /* TODO: DFS not (yet) supported */
988 params.radar_required = err;
990 if (cfg80211_chandef_identical(¶ms.chandef,
991 &sdata->vif.bss_conf.chandef)) {
993 "received csa with an identical chandef, ignoring\n");
998 "received channel switch announcement to go to channel %d MHz\n",
999 params.chandef.chan->center_freq);
1001 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1003 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1004 if (ifmsh->pre_value >= csa_ie.pre_value)
1006 ifmsh->pre_value = csa_ie.pre_value;
1009 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1012 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1014 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1022 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1023 struct ieee80211_mgmt *mgmt, size_t len)
1025 struct ieee80211_local *local = sdata->local;
1026 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1027 struct sk_buff *presp;
1028 struct beacon_data *bcn;
1029 struct ieee80211_mgmt *hdr;
1030 struct ieee802_11_elems elems;
1034 pos = mgmt->u.probe_req.variable;
1035 baselen = (u8 *) pos - (u8 *) mgmt;
1039 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1044 /* 802.11-2012 10.1.4.3.2 */
1045 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1046 !is_broadcast_ether_addr(mgmt->da)) ||
1047 elems.ssid_len != 0)
1050 if (elems.mesh_id_len != 0 &&
1051 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1052 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1056 bcn = rcu_dereference(ifmsh->beacon);
1061 presp = dev_alloc_skb(local->tx_headroom +
1062 bcn->head_len + bcn->tail_len);
1066 skb_reserve(presp, local->tx_headroom);
1067 memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
1068 memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
1069 hdr = (struct ieee80211_mgmt *) presp->data;
1070 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1071 IEEE80211_STYPE_PROBE_RESP);
1072 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1073 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1074 ieee80211_tx_skb(sdata, presp);
1079 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1081 struct ieee80211_mgmt *mgmt,
1083 struct ieee80211_rx_status *rx_status)
1085 struct ieee80211_local *local = sdata->local;
1086 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1087 struct ieee802_11_elems elems;
1088 struct ieee80211_channel *channel;
1091 enum nl80211_band band = rx_status->band;
1093 /* ignore ProbeResp to foreign address */
1094 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1095 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1098 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1102 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1105 /* ignore non-mesh or secure / unsecure mismatch */
1106 if ((!elems.mesh_id || !elems.mesh_config) ||
1107 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1108 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1111 if (elems.ds_params)
1112 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1114 freq = rx_status->freq;
1116 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1118 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1121 if (mesh_matches_local(sdata, &elems))
1122 mesh_neighbour_update(sdata, mgmt->sa, &elems);
1124 if (ifmsh->sync_ops)
1125 ifmsh->sync_ops->rx_bcn_presp(sdata,
1126 stype, mgmt, &elems, rx_status);
1128 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1129 !sdata->vif.csa_active)
1130 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1133 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1135 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1136 struct mesh_csa_settings *tmp_csa_settings;
1140 /* Reset the TTL value and Initiator flag */
1141 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1142 ifmsh->chsw_ttl = 0;
1144 /* Remove the CSA and MCSP elements from the beacon */
1145 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1146 RCU_INIT_POINTER(ifmsh->csa, NULL);
1147 if (tmp_csa_settings)
1148 kfree_rcu(tmp_csa_settings, rcu_head);
1149 ret = ieee80211_mesh_rebuild_beacon(sdata);
1153 changed |= BSS_CHANGED_BEACON;
1155 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1156 sdata->vif.bss_conf.chandef.chan->center_freq);
1160 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1161 struct cfg80211_csa_settings *csa_settings)
1163 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1164 struct mesh_csa_settings *tmp_csa_settings;
1167 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1169 if (!tmp_csa_settings)
1172 memcpy(&tmp_csa_settings->settings, csa_settings,
1173 sizeof(struct cfg80211_csa_settings));
1175 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1177 ret = ieee80211_mesh_rebuild_beacon(sdata);
1179 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1180 RCU_INIT_POINTER(ifmsh->csa, NULL);
1181 kfree_rcu(tmp_csa_settings, rcu_head);
1185 return BSS_CHANGED_BEACON;
1188 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1189 struct ieee80211_mgmt *mgmt, size_t len)
1191 struct ieee80211_mgmt *mgmt_fwd;
1192 struct sk_buff *skb;
1193 struct ieee80211_local *local = sdata->local;
1194 u8 *pos = mgmt->u.action.u.chan_switch.variable;
1197 skb = dev_alloc_skb(local->tx_headroom + len);
1200 skb_reserve(skb, local->tx_headroom);
1201 mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
1203 /* offset_ttl is based on whether the secondary channel
1204 * offset is available or not. Subtract 1 from the mesh TTL
1205 * and disable the initiator flag before forwarding.
1207 offset_ttl = (len < 42) ? 7 : 10;
1208 *(pos + offset_ttl) -= 1;
1209 *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1211 memcpy(mgmt_fwd, mgmt, len);
1212 eth_broadcast_addr(mgmt_fwd->da);
1213 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1214 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1216 ieee80211_tx_skb(sdata, skb);
1220 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1221 struct ieee80211_mgmt *mgmt, size_t len)
1223 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1224 struct ieee802_11_elems elems;
1226 bool fwd_csa = true;
1230 if (mgmt->u.action.u.measurement.action_code !=
1231 WLAN_ACTION_SPCT_CHL_SWITCH)
1234 pos = mgmt->u.action.u.chan_switch.variable;
1235 baselen = offsetof(struct ieee80211_mgmt,
1236 u.action.u.chan_switch.variable);
1237 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1239 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1240 if (!--ifmsh->chsw_ttl)
1243 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1244 if (ifmsh->pre_value >= pre_value)
1247 ifmsh->pre_value = pre_value;
1249 if (!sdata->vif.csa_active &&
1250 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1251 mcsa_dbg(sdata, "Failed to process CSA action frame");
1255 /* forward or re-broadcast the CSA frame */
1257 if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0)
1258 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1262 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1263 struct ieee80211_mgmt *mgmt,
1265 struct ieee80211_rx_status *rx_status)
1267 switch (mgmt->u.action.category) {
1268 case WLAN_CATEGORY_SELF_PROTECTED:
1269 switch (mgmt->u.action.u.self_prot.action_code) {
1270 case WLAN_SP_MESH_PEERING_OPEN:
1271 case WLAN_SP_MESH_PEERING_CLOSE:
1272 case WLAN_SP_MESH_PEERING_CONFIRM:
1273 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1277 case WLAN_CATEGORY_MESH_ACTION:
1278 if (mesh_action_is_path_sel(mgmt))
1279 mesh_rx_path_sel_frame(sdata, mgmt, len);
1281 case WLAN_CATEGORY_SPECTRUM_MGMT:
1282 mesh_rx_csa_frame(sdata, mgmt, len);
1287 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1288 struct sk_buff *skb)
1290 struct ieee80211_rx_status *rx_status;
1291 struct ieee80211_mgmt *mgmt;
1296 /* mesh already went down */
1297 if (!sdata->u.mesh.mesh_id_len)
1300 rx_status = IEEE80211_SKB_RXCB(skb);
1301 mgmt = (struct ieee80211_mgmt *) skb->data;
1302 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1305 case IEEE80211_STYPE_PROBE_RESP:
1306 case IEEE80211_STYPE_BEACON:
1307 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1310 case IEEE80211_STYPE_PROBE_REQ:
1311 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1313 case IEEE80211_STYPE_ACTION:
1314 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1318 sdata_unlock(sdata);
1321 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1323 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1324 u32 bit, changed = 0;
1326 for_each_set_bit(bit, &ifmsh->mbss_changed,
1327 sizeof(changed) * BITS_PER_BYTE) {
1328 clear_bit(bit, &ifmsh->mbss_changed);
1329 changed |= BIT(bit);
1332 if (sdata->vif.bss_conf.enable_beacon &&
1333 (changed & (BSS_CHANGED_BEACON |
1335 BSS_CHANGED_BASIC_RATES |
1336 BSS_CHANGED_BEACON_INT)))
1337 if (ieee80211_mesh_rebuild_beacon(sdata))
1340 ieee80211_bss_info_change_notify(sdata, changed);
1343 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1345 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1349 /* mesh already went down */
1350 if (!sdata->u.mesh.mesh_id_len)
1353 if (ifmsh->preq_queue_len &&
1355 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1356 mesh_path_start_discovery(sdata);
1358 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1359 ieee80211_mesh_housekeeping(sdata);
1361 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1362 ieee80211_mesh_rootpath(sdata);
1364 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1365 mesh_sync_adjust_tbtt(sdata);
1367 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1368 mesh_bss_info_changed(sdata);
1370 sdata_unlock(sdata);
1374 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1376 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1377 static u8 zero_addr[ETH_ALEN] = {};
1379 setup_timer(&ifmsh->housekeeping_timer,
1380 ieee80211_mesh_housekeeping_timer,
1381 (unsigned long) sdata);
1383 ifmsh->accepting_plinks = true;
1384 atomic_set(&ifmsh->mpaths, 0);
1385 mesh_rmc_init(sdata);
1386 ifmsh->last_preq = jiffies;
1387 ifmsh->next_perr = jiffies;
1388 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1389 /* Allocate all mesh structures when creating the first mesh interface. */
1390 if (!mesh_allocated)
1393 mesh_pathtbl_init(sdata);
1395 setup_timer(&ifmsh->mesh_path_timer,
1396 ieee80211_mesh_path_timer,
1397 (unsigned long) sdata);
1398 setup_timer(&ifmsh->mesh_path_root_timer,
1399 ieee80211_mesh_path_root_timer,
1400 (unsigned long) sdata);
1401 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1402 skb_queue_head_init(&ifmsh->ps.bc_buf);
1403 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1404 spin_lock_init(&ifmsh->sync_offset_lock);
1405 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1407 sdata->vif.bss_conf.bssid = zero_addr;
1410 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1412 mesh_rmc_free(sdata);
1413 mesh_pathtbl_unregister(sdata);