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)
30 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
34 void ieee80211s_stop(void)
38 mesh_pathtbl_unregister();
39 kmem_cache_destroy(rm_cache);
42 static void ieee80211_mesh_housekeeping_timer(unsigned long data)
44 struct ieee80211_sub_if_data *sdata = (void *) data;
45 struct ieee80211_local *local = sdata->local;
46 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
48 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
50 ieee80211_queue_work(&local->hw, &sdata->work);
54 * mesh_matches_local - check if the config of a mesh point matches ours
56 * @sdata: local mesh subif
57 * @ie: information elements of a management frame from the mesh peer
59 * This function checks if the mesh configuration of a mesh point matches the
60 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
62 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
63 struct ieee802_11_elems *ie)
65 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
67 struct cfg80211_chan_def sta_chan_def;
70 * As support for each feature is added, check for matching
71 * - On mesh config capabilities
72 * - Power Save Support En
73 * - Sync support enabled
74 * - Sync support active
75 * - Sync support required from peer
77 * - Power management control on fc
79 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
80 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
81 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
82 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
83 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
84 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
85 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
88 ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata),
91 if (sdata->vif.bss_conf.basic_rates != basic_rates)
94 ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
95 ie->ht_operation, &sta_chan_def);
97 ieee80211_vht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
98 ie->vht_operation, &sta_chan_def);
100 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
108 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
110 * @ie: information elements of a management frame from the mesh peer
112 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
114 return (ie->mesh_config->meshconf_cap &
115 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
119 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
121 * @sdata: mesh interface in which mesh beacons are going to be updated
123 * Returns: beacon changed flag if the beacon content changed.
125 u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
130 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
131 * the mesh interface might be able to establish plinks with peers that
132 * are already on the table but are not on PLINK_ESTAB state. However,
133 * in general the mesh interface is not accepting peer link requests
134 * from new peers, and that must be reflected in the beacon
136 free_plinks = mesh_plink_availables(sdata);
138 if (free_plinks != sdata->u.mesh.accepting_plinks) {
139 sdata->u.mesh.accepting_plinks = free_plinks;
140 changed = BSS_CHANGED_BEACON;
147 * mesh_sta_cleanup - clean up any mesh sta state
149 * @sta: mesh sta to clean up.
151 void mesh_sta_cleanup(struct sta_info *sta)
153 struct ieee80211_sub_if_data *sdata = sta->sdata;
157 * maybe userspace handles peer allocation and peering, but in either
158 * case the beacon is still generated by the kernel and we might need
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);
168 ieee80211_mbss_info_change_notify(sdata, changed);
171 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
175 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
176 if (!sdata->u.mesh.rmc)
178 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
179 for (i = 0; i < RMC_BUCKETS; i++)
180 INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
184 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
186 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
187 struct rmc_entry *p, *n;
190 if (!sdata->u.mesh.rmc)
193 for (i = 0; i < RMC_BUCKETS; i++) {
194 list_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
196 kmem_cache_free(rm_cache, p);
201 sdata->u.mesh.rmc = NULL;
205 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
208 * @sa: source address
209 * @mesh_hdr: mesh_header
211 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
213 * Checks using the source address and the mesh sequence number if we have
214 * received this frame lately. If the frame is not in the cache, it is added to
217 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
218 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
220 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
224 struct rmc_entry *p, *n;
226 /* Don't care about endianness since only match matters */
227 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
228 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
229 list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
231 if (time_after(jiffies, p->exp_time) ||
232 entries == RMC_QUEUE_MAX_LEN) {
234 kmem_cache_free(rm_cache, p);
236 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
240 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
245 p->exp_time = jiffies + RMC_TIMEOUT;
246 memcpy(p->sa, sa, ETH_ALEN);
247 list_add(&p->list, &rmc->bucket[idx]);
251 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
254 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
256 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
258 if (skb_tailroom(skb) < 2 + meshconf_len)
261 pos = skb_put(skb, 2 + meshconf_len);
262 *pos++ = WLAN_EID_MESH_CONFIG;
263 *pos++ = meshconf_len;
265 /* save a pointer for quick updates in pre-tbtt */
266 ifmsh->meshconf_offset = pos - skb->data;
268 /* Active path selection protocol ID */
269 *pos++ = ifmsh->mesh_pp_id;
270 /* Active path selection metric ID */
271 *pos++ = ifmsh->mesh_pm_id;
272 /* Congestion control mode identifier */
273 *pos++ = ifmsh->mesh_cc_id;
274 /* Synchronization protocol identifier */
275 *pos++ = ifmsh->mesh_sp_id;
276 /* Authentication Protocol identifier */
277 *pos++ = ifmsh->mesh_auth_id;
278 /* Mesh Formation Info - number of neighbors */
279 neighbors = atomic_read(&ifmsh->estab_plinks);
280 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
281 *pos++ = neighbors << 1;
282 /* Mesh capability */
284 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
285 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
286 *pos |= ifmsh->accepting_plinks ?
287 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
288 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
289 *pos |= ifmsh->ps_peers_deep_sleep ?
290 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
291 *pos++ |= ifmsh->adjusting_tbtt ?
292 IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00;
298 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
300 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
303 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
306 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
307 *pos++ = WLAN_EID_MESH_ID;
308 *pos++ = ifmsh->mesh_id_len;
309 if (ifmsh->mesh_id_len)
310 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
315 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
318 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
321 /* see IEEE802.11-2012 13.14.6 */
322 if (ifmsh->ps_peers_light_sleep == 0 &&
323 ifmsh->ps_peers_deep_sleep == 0 &&
324 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
327 if (skb_tailroom(skb) < 4)
330 pos = skb_put(skb, 2 + 2);
331 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
333 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
338 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
341 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
345 if (!ifmsh->ie || !ifmsh->ie_len)
348 /* fast-forward to vendor IEs */
349 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
352 len = ifmsh->ie_len - offset;
353 data = ifmsh->ie + offset;
354 if (skb_tailroom(skb) < len)
356 memcpy(skb_put(skb, len), data, len);
362 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
364 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
368 if (!ifmsh->ie || !ifmsh->ie_len)
372 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
378 if (skb_tailroom(skb) < len)
380 memcpy(skb_put(skb, len), data, len);
385 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
388 struct ieee80211_chanctx_conf *chanctx_conf;
389 struct ieee80211_channel *chan;
392 if (skb_tailroom(skb) < 3)
396 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
397 if (WARN_ON(!chanctx_conf)) {
401 chan = chanctx_conf->def.chan;
404 pos = skb_put(skb, 2 + 1);
405 *pos++ = WLAN_EID_DS_PARAMS;
407 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
412 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
415 struct ieee80211_local *local = sdata->local;
416 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
417 struct ieee80211_supported_band *sband;
420 sband = local->hw.wiphy->bands[band];
421 if (!sband->ht_cap.ht_supported ||
422 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
423 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
424 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
427 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
430 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
431 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
436 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
439 struct ieee80211_local *local = sdata->local;
440 struct ieee80211_chanctx_conf *chanctx_conf;
441 struct ieee80211_channel *channel;
442 struct ieee80211_supported_band *sband;
443 struct ieee80211_sta_ht_cap *ht_cap;
447 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
448 if (WARN_ON(!chanctx_conf)) {
452 channel = chanctx_conf->def.chan;
455 sband = local->hw.wiphy->bands[channel->band];
456 ht_cap = &sband->ht_cap;
458 if (!ht_cap->ht_supported ||
459 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
460 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
461 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
464 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
467 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
468 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
469 sdata->vif.bss_conf.ht_operation_mode,
475 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
478 struct ieee80211_local *local = sdata->local;
479 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
480 struct ieee80211_supported_band *sband;
483 sband = local->hw.wiphy->bands[band];
484 if (!sband->vht_cap.vht_supported ||
485 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
486 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
487 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
490 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
493 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
494 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
499 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
502 struct ieee80211_local *local = sdata->local;
503 struct ieee80211_chanctx_conf *chanctx_conf;
504 struct ieee80211_channel *channel;
505 struct ieee80211_supported_band *sband;
506 struct ieee80211_sta_vht_cap *vht_cap;
510 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
511 if (WARN_ON(!chanctx_conf)) {
515 channel = chanctx_conf->def.chan;
518 sband = local->hw.wiphy->bands[channel->band];
519 vht_cap = &sband->vht_cap;
521 if (!vht_cap->vht_supported ||
522 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
523 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
524 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
527 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
530 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
531 ieee80211_ie_build_vht_oper(pos, vht_cap,
532 &sdata->vif.bss_conf.chandef);
537 static void ieee80211_mesh_path_timer(unsigned long data)
539 struct ieee80211_sub_if_data *sdata =
540 (struct ieee80211_sub_if_data *) data;
542 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
545 static void ieee80211_mesh_path_root_timer(unsigned long data)
547 struct ieee80211_sub_if_data *sdata =
548 (struct ieee80211_sub_if_data *) data;
549 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
551 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
553 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
556 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
558 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
559 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
561 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
562 /* stop running timer */
563 del_timer_sync(&ifmsh->mesh_path_root_timer);
568 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
569 * @hdr: 802.11 frame header
570 * @fc: frame control field
571 * @meshda: destination address in the mesh
572 * @meshsa: source address address in the mesh. Same as TA, as frame is
573 * locally originated.
575 * Return the length of the 802.11 (does not include a mesh control header)
577 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
578 const u8 *meshda, const u8 *meshsa)
580 if (is_multicast_ether_addr(meshda)) {
581 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
583 memcpy(hdr->addr1, meshda, ETH_ALEN);
584 memcpy(hdr->addr2, meshsa, ETH_ALEN);
585 memcpy(hdr->addr3, meshsa, ETH_ALEN);
588 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
590 eth_zero_addr(hdr->addr1); /* RA is resolved later */
591 memcpy(hdr->addr2, meshsa, ETH_ALEN);
592 memcpy(hdr->addr3, meshda, ETH_ALEN);
593 memcpy(hdr->addr4, meshsa, ETH_ALEN);
599 * ieee80211_new_mesh_header - create a new mesh header
600 * @sdata: mesh interface to be used
601 * @meshhdr: uninitialized mesh header
602 * @addr4or5: 1st address in the ae header, which may correspond to address 4
603 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
605 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
608 * Return the header length.
610 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
611 struct ieee80211s_hdr *meshhdr,
612 const char *addr4or5, const char *addr6)
614 if (WARN_ON(!addr4or5 && addr6))
617 memset(meshhdr, 0, sizeof(*meshhdr));
619 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
621 /* FIXME: racy -- TX on multiple queues can be concurrent */
622 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
623 sdata->u.mesh.mesh_seqnum++;
625 if (addr4or5 && !addr6) {
626 meshhdr->flags |= MESH_FLAGS_AE_A4;
627 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
629 } else if (addr4or5 && addr6) {
630 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
631 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
632 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
639 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
641 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
644 if (ifmsh->mshcfg.plink_timeout > 0)
645 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
646 mesh_path_expire(sdata);
648 changed = mesh_accept_plinks_update(sdata);
649 ieee80211_mbss_info_change_notify(sdata, changed);
651 mod_timer(&ifmsh->housekeeping_timer,
652 round_jiffies(jiffies +
653 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
656 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
658 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
661 mesh_path_tx_root_frame(sdata);
663 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
664 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
666 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
668 mod_timer(&ifmsh->mesh_path_root_timer,
669 round_jiffies(TU_TO_EXP_TIME(interval)));
673 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
675 struct beacon_data *bcn;
676 int head_len, tail_len;
678 struct ieee80211_mgmt *mgmt;
679 struct ieee80211_chanctx_conf *chanctx_conf;
680 struct mesh_csa_settings *csa;
681 enum ieee80211_band band;
683 struct ieee80211_sub_if_data *sdata;
684 int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
685 sizeof(mgmt->u.beacon);
687 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
689 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
690 band = chanctx_conf->def.chan->band;
695 /* Channel Switch Announcement */
696 2 + sizeof(struct ieee80211_channel_sw_ie) +
697 /* Mesh Channel Swith Parameters */
698 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
699 2 + 8 + /* supported rates */
700 2 + 3; /* DS params */
701 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
702 2 + sizeof(struct ieee80211_ht_cap) +
703 2 + sizeof(struct ieee80211_ht_operation) +
704 2 + ifmsh->mesh_id_len +
705 2 + sizeof(struct ieee80211_meshconf_ie) +
706 2 + sizeof(__le16) + /* awake window */
707 2 + sizeof(struct ieee80211_vht_cap) +
708 2 + sizeof(struct ieee80211_vht_operation) +
711 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
712 /* need an skb for IE builders to operate on */
713 skb = dev_alloc_skb(max(head_len, tail_len));
719 * pointers go into the block we allocated,
720 * memory is | beacon_data | head | tail |
722 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
724 /* fill in the head */
725 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
726 memset(mgmt, 0, hdr_len);
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_BEACON);
729 eth_broadcast_addr(mgmt->da);
730 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
731 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
732 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
733 mgmt->u.beacon.beacon_int =
734 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
735 mgmt->u.beacon.capab_info |= cpu_to_le16(
736 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
738 pos = skb_put(skb, 2);
739 *pos++ = WLAN_EID_SSID;
743 csa = rcu_dereference(ifmsh->csa);
745 pos = skb_put(skb, 13);
747 *pos++ = WLAN_EID_CHANNEL_SWITCH;
750 *pos++ = ieee80211_frequency_to_channel(
751 csa->settings.chandef.chan->center_freq);
752 bcn->csa_current_counter = csa->settings.count;
753 bcn->csa_counter_offsets[0] = hdr_len + 6;
754 *pos++ = csa->settings.count;
755 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
757 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
758 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
759 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
761 *pos++ = ifmsh->chsw_ttl;
763 *pos++ |= csa->settings.block_tx ?
764 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
765 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
767 put_unaligned_le16(ifmsh->pre_value, pos);
772 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
773 mesh_add_ds_params_ie(sdata, skb))
776 bcn->head_len = skb->len;
777 memcpy(bcn->head, skb->data, bcn->head_len);
781 bcn->tail = bcn->head + bcn->head_len;
783 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
784 mesh_add_rsn_ie(sdata, skb) ||
785 mesh_add_ht_cap_ie(sdata, skb) ||
786 mesh_add_ht_oper_ie(sdata, skb) ||
787 mesh_add_meshid_ie(sdata, skb) ||
788 mesh_add_meshconf_ie(sdata, skb) ||
789 mesh_add_awake_window_ie(sdata, skb) ||
790 mesh_add_vht_cap_ie(sdata, skb) ||
791 mesh_add_vht_oper_ie(sdata, skb) ||
792 mesh_add_vendor_ies(sdata, skb))
795 bcn->tail_len = skb->len;
796 memcpy(bcn->tail, skb->data, bcn->tail_len);
797 bcn->meshconf = (struct ieee80211_meshconf_ie *)
798 (bcn->tail + ifmsh->meshconf_offset);
801 rcu_assign_pointer(ifmsh->beacon, bcn);
810 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
812 struct beacon_data *old_bcn;
815 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
816 lockdep_is_held(&sdata->wdev.mtx));
817 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
819 /* just reuse old beacon */
823 kfree_rcu(old_bcn, rcu_head);
827 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
830 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
831 unsigned long bits = changed;
837 /* if we race with running work, worst case this work becomes a noop */
838 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
839 set_bit(bit, &ifmsh->mbss_changed);
840 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
841 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
844 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
846 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
847 struct ieee80211_local *local = sdata->local;
848 u32 changed = BSS_CHANGED_BEACON |
849 BSS_CHANGED_BEACON_ENABLED |
851 BSS_CHANGED_BASIC_RATES |
852 BSS_CHANGED_BEACON_INT;
854 local->fif_other_bss++;
855 /* mesh ifaces must set allmulti to forward mcast traffic */
856 atomic_inc(&local->iff_allmultis);
857 ieee80211_configure_filter(local);
859 ifmsh->mesh_cc_id = 0; /* Disabled */
860 /* register sync ops from extensible synchronization framework */
861 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
862 ifmsh->adjusting_tbtt = false;
863 ifmsh->sync_offset_clockdrift_max = 0;
864 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
865 ieee80211_mesh_root_setup(ifmsh);
866 ieee80211_queue_work(&local->hw, &sdata->work);
867 sdata->vif.bss_conf.ht_operation_mode =
868 ifmsh->mshcfg.ht_opmode;
869 sdata->vif.bss_conf.enable_beacon = true;
871 changed |= ieee80211_mps_local_status_update(sdata);
873 if (ieee80211_mesh_build_beacon(ifmsh)) {
874 ieee80211_stop_mesh(sdata);
878 ieee80211_recalc_dtim(local, sdata);
879 ieee80211_bss_info_change_notify(sdata, changed);
881 netif_carrier_on(sdata->dev);
885 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
887 struct ieee80211_local *local = sdata->local;
888 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
889 struct beacon_data *bcn;
891 netif_carrier_off(sdata->dev);
893 /* stop the beacon */
894 ifmsh->mesh_id_len = 0;
895 sdata->vif.bss_conf.enable_beacon = false;
896 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
897 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
898 bcn = rcu_dereference_protected(ifmsh->beacon,
899 lockdep_is_held(&sdata->wdev.mtx));
900 RCU_INIT_POINTER(ifmsh->beacon, NULL);
901 kfree_rcu(bcn, rcu_head);
903 /* flush STAs and mpaths on this iface */
904 sta_info_flush(sdata);
905 mesh_path_flush_by_iface(sdata);
907 /* free all potentially still buffered group-addressed frames */
908 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
909 skb_queue_purge(&ifmsh->ps.bc_buf);
911 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
912 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
913 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
915 /* clear any mesh work (for next join) we may have accrued */
916 ifmsh->wrkq_flags = 0;
917 ifmsh->mbss_changed = 0;
919 local->fif_other_bss--;
920 atomic_dec(&local->iff_allmultis);
921 ieee80211_configure_filter(local);
925 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
926 struct ieee802_11_elems *elems, bool beacon)
928 struct cfg80211_csa_settings params;
929 struct ieee80211_csa_ie csa_ie;
930 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
931 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
935 sdata_assert_lock(sdata);
937 sta_flags = IEEE80211_STA_DISABLE_VHT;
938 switch (sdata->vif.bss_conf.chandef.width) {
939 case NL80211_CHAN_WIDTH_20_NOHT:
940 sta_flags |= IEEE80211_STA_DISABLE_HT;
941 case NL80211_CHAN_WIDTH_20:
942 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
948 memset(¶ms, 0, sizeof(params));
949 memset(&csa_ie, 0, sizeof(csa_ie));
950 err = ieee80211_parse_ch_switch_ie(sdata, elems, band,
951 sta_flags, sdata->vif.addr,
958 params.chandef = csa_ie.chandef;
959 params.count = csa_ie.count;
961 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
962 IEEE80211_CHAN_DISABLED)) {
964 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
966 params.chandef.chan->center_freq,
967 params.chandef.width,
968 params.chandef.center_freq1,
969 params.chandef.center_freq2);
973 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
975 NL80211_IFTYPE_MESH_POINT);
979 /* TODO: DFS not (yet) supported */
982 params.radar_required = err;
984 if (cfg80211_chandef_identical(¶ms.chandef,
985 &sdata->vif.bss_conf.chandef)) {
987 "received csa with an identical chandef, ignoring\n");
992 "received channel switch announcement to go to channel %d MHz\n",
993 params.chandef.chan->center_freq);
995 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
997 ifmsh->chsw_ttl = csa_ie.ttl - 1;
998 if (ifmsh->pre_value >= csa_ie.pre_value)
1000 ifmsh->pre_value = csa_ie.pre_value;
1003 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1006 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1008 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1016 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1017 struct ieee80211_mgmt *mgmt, size_t len)
1019 struct ieee80211_local *local = sdata->local;
1020 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1021 struct sk_buff *presp;
1022 struct beacon_data *bcn;
1023 struct ieee80211_mgmt *hdr;
1024 struct ieee802_11_elems elems;
1028 pos = mgmt->u.probe_req.variable;
1029 baselen = (u8 *) pos - (u8 *) mgmt;
1033 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1038 /* 802.11-2012 10.1.4.3.2 */
1039 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1040 !is_broadcast_ether_addr(mgmt->da)) ||
1041 elems.ssid_len != 0)
1044 if (elems.mesh_id_len != 0 &&
1045 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1046 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1050 bcn = rcu_dereference(ifmsh->beacon);
1055 presp = dev_alloc_skb(local->tx_headroom +
1056 bcn->head_len + bcn->tail_len);
1060 skb_reserve(presp, local->tx_headroom);
1061 memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
1062 memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
1063 hdr = (struct ieee80211_mgmt *) presp->data;
1064 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1065 IEEE80211_STYPE_PROBE_RESP);
1066 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1067 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1068 ieee80211_tx_skb(sdata, presp);
1073 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1075 struct ieee80211_mgmt *mgmt,
1077 struct ieee80211_rx_status *rx_status)
1079 struct ieee80211_local *local = sdata->local;
1080 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1081 struct ieee802_11_elems elems;
1082 struct ieee80211_channel *channel;
1085 enum ieee80211_band band = rx_status->band;
1087 /* ignore ProbeResp to foreign address */
1088 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1089 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1092 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1096 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1099 /* ignore non-mesh or secure / unsecure mismatch */
1100 if ((!elems.mesh_id || !elems.mesh_config) ||
1101 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1102 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1105 if (elems.ds_params)
1106 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1108 freq = rx_status->freq;
1110 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1112 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1115 if (mesh_matches_local(sdata, &elems))
1116 mesh_neighbour_update(sdata, mgmt->sa, &elems);
1118 if (ifmsh->sync_ops)
1119 ifmsh->sync_ops->rx_bcn_presp(sdata,
1120 stype, mgmt, &elems, rx_status);
1122 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1123 !sdata->vif.csa_active)
1124 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1127 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1129 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1130 struct mesh_csa_settings *tmp_csa_settings;
1134 /* Reset the TTL value and Initiator flag */
1135 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1136 ifmsh->chsw_ttl = 0;
1138 /* Remove the CSA and MCSP elements from the beacon */
1139 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1140 RCU_INIT_POINTER(ifmsh->csa, NULL);
1141 if (tmp_csa_settings)
1142 kfree_rcu(tmp_csa_settings, rcu_head);
1143 ret = ieee80211_mesh_rebuild_beacon(sdata);
1147 changed |= BSS_CHANGED_BEACON;
1149 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1150 sdata->vif.bss_conf.chandef.chan->center_freq);
1154 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1155 struct cfg80211_csa_settings *csa_settings)
1157 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1158 struct mesh_csa_settings *tmp_csa_settings;
1161 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1163 if (!tmp_csa_settings)
1166 memcpy(&tmp_csa_settings->settings, csa_settings,
1167 sizeof(struct cfg80211_csa_settings));
1169 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1171 ret = ieee80211_mesh_rebuild_beacon(sdata);
1173 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1174 RCU_INIT_POINTER(ifmsh->csa, NULL);
1175 kfree_rcu(tmp_csa_settings, rcu_head);
1179 return BSS_CHANGED_BEACON;
1182 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1183 struct ieee80211_mgmt *mgmt, size_t len)
1185 struct ieee80211_mgmt *mgmt_fwd;
1186 struct sk_buff *skb;
1187 struct ieee80211_local *local = sdata->local;
1188 u8 *pos = mgmt->u.action.u.chan_switch.variable;
1191 skb = dev_alloc_skb(local->tx_headroom + len);
1194 skb_reserve(skb, local->tx_headroom);
1195 mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
1197 /* offset_ttl is based on whether the secondary channel
1198 * offset is available or not. Subtract 1 from the mesh TTL
1199 * and disable the initiator flag before forwarding.
1201 offset_ttl = (len < 42) ? 7 : 10;
1202 *(pos + offset_ttl) -= 1;
1203 *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1205 memcpy(mgmt_fwd, mgmt, len);
1206 eth_broadcast_addr(mgmt_fwd->da);
1207 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1208 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1210 ieee80211_tx_skb(sdata, skb);
1214 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1215 struct ieee80211_mgmt *mgmt, size_t len)
1217 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1218 struct ieee802_11_elems elems;
1220 bool fwd_csa = true;
1224 if (mgmt->u.action.u.measurement.action_code !=
1225 WLAN_ACTION_SPCT_CHL_SWITCH)
1228 pos = mgmt->u.action.u.chan_switch.variable;
1229 baselen = offsetof(struct ieee80211_mgmt,
1230 u.action.u.chan_switch.variable);
1231 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1233 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1234 if (!--ifmsh->chsw_ttl)
1237 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1238 if (ifmsh->pre_value >= pre_value)
1241 ifmsh->pre_value = pre_value;
1243 if (!sdata->vif.csa_active &&
1244 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1245 mcsa_dbg(sdata, "Failed to process CSA action frame");
1249 /* forward or re-broadcast the CSA frame */
1251 if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0)
1252 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1256 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1257 struct ieee80211_mgmt *mgmt,
1259 struct ieee80211_rx_status *rx_status)
1261 switch (mgmt->u.action.category) {
1262 case WLAN_CATEGORY_SELF_PROTECTED:
1263 switch (mgmt->u.action.u.self_prot.action_code) {
1264 case WLAN_SP_MESH_PEERING_OPEN:
1265 case WLAN_SP_MESH_PEERING_CLOSE:
1266 case WLAN_SP_MESH_PEERING_CONFIRM:
1267 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1271 case WLAN_CATEGORY_MESH_ACTION:
1272 if (mesh_action_is_path_sel(mgmt))
1273 mesh_rx_path_sel_frame(sdata, mgmt, len);
1275 case WLAN_CATEGORY_SPECTRUM_MGMT:
1276 mesh_rx_csa_frame(sdata, mgmt, len);
1281 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1282 struct sk_buff *skb)
1284 struct ieee80211_rx_status *rx_status;
1285 struct ieee80211_mgmt *mgmt;
1290 /* mesh already went down */
1291 if (!sdata->u.mesh.mesh_id_len)
1294 rx_status = IEEE80211_SKB_RXCB(skb);
1295 mgmt = (struct ieee80211_mgmt *) skb->data;
1296 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1299 case IEEE80211_STYPE_PROBE_RESP:
1300 case IEEE80211_STYPE_BEACON:
1301 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1304 case IEEE80211_STYPE_PROBE_REQ:
1305 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1307 case IEEE80211_STYPE_ACTION:
1308 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1312 sdata_unlock(sdata);
1315 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1317 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1318 u32 bit, changed = 0;
1320 for_each_set_bit(bit, &ifmsh->mbss_changed,
1321 sizeof(changed) * BITS_PER_BYTE) {
1322 clear_bit(bit, &ifmsh->mbss_changed);
1323 changed |= BIT(bit);
1326 if (sdata->vif.bss_conf.enable_beacon &&
1327 (changed & (BSS_CHANGED_BEACON |
1329 BSS_CHANGED_BASIC_RATES |
1330 BSS_CHANGED_BEACON_INT)))
1331 if (ieee80211_mesh_rebuild_beacon(sdata))
1334 ieee80211_bss_info_change_notify(sdata, changed);
1337 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1339 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1343 /* mesh already went down */
1344 if (!sdata->u.mesh.mesh_id_len)
1347 if (ifmsh->preq_queue_len &&
1349 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1350 mesh_path_start_discovery(sdata);
1352 if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags))
1353 mesh_mpath_table_grow();
1355 if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags))
1356 mesh_mpp_table_grow();
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);
1373 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
1375 struct ieee80211_sub_if_data *sdata;
1378 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1379 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1380 ieee80211_sdata_running(sdata))
1381 ieee80211_queue_work(&local->hw, &sdata->work);
1385 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1387 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1388 static u8 zero_addr[ETH_ALEN] = {};
1390 setup_timer(&ifmsh->housekeeping_timer,
1391 ieee80211_mesh_housekeeping_timer,
1392 (unsigned long) sdata);
1394 ifmsh->accepting_plinks = true;
1395 atomic_set(&ifmsh->mpaths, 0);
1396 mesh_rmc_init(sdata);
1397 ifmsh->last_preq = jiffies;
1398 ifmsh->next_perr = jiffies;
1399 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1400 /* Allocate all mesh structures when creating the first mesh interface. */
1401 if (!mesh_allocated)
1403 setup_timer(&ifmsh->mesh_path_timer,
1404 ieee80211_mesh_path_timer,
1405 (unsigned long) sdata);
1406 setup_timer(&ifmsh->mesh_path_root_timer,
1407 ieee80211_mesh_path_root_timer,
1408 (unsigned long) sdata);
1409 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1410 skb_queue_head_init(&ifmsh->ps.bc_buf);
1411 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1412 spin_lock_init(&ifmsh->sync_offset_lock);
1413 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1415 sdata->vif.bss_conf.bssid = zero_addr;