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;
66 struct ieee80211_supported_band *sband;
69 * As support for each feature is added, check for matching
70 * - On mesh config capabilities
71 * - Power Save Support En
72 * - Sync support enabled
73 * - Sync support active
74 * - Sync support required from peer
76 * - Power management control on fc
78 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
79 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
80 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
81 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
82 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
83 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
84 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
87 sband = ieee80211_get_sband(sdata);
91 ieee80211_sta_get_rates(sdata, ie, sband->band,
94 if (sdata->vif.bss_conf.basic_rates != basic_rates)
97 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
99 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
100 ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def);
102 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
110 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
112 * @ie: information elements of a management frame from the mesh peer
114 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
116 return (ie->mesh_config->meshconf_cap &
117 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
121 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
123 * @sdata: mesh interface in which mesh beacons are going to be updated
125 * Returns: beacon changed flag if the beacon content changed.
127 u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
132 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
133 * the mesh interface might be able to establish plinks with peers that
134 * are already on the table but are not on PLINK_ESTAB state. However,
135 * in general the mesh interface is not accepting peer link requests
136 * from new peers, and that must be reflected in the beacon
138 free_plinks = mesh_plink_availables(sdata);
140 if (free_plinks != sdata->u.mesh.accepting_plinks) {
141 sdata->u.mesh.accepting_plinks = free_plinks;
142 changed = BSS_CHANGED_BEACON;
149 * mesh_sta_cleanup - clean up any mesh sta state
151 * @sta: mesh sta to clean up.
153 void mesh_sta_cleanup(struct sta_info *sta)
155 struct ieee80211_sub_if_data *sdata = sta->sdata;
156 u32 changed = mesh_plink_deactivate(sta);
159 ieee80211_mbss_info_change_notify(sdata, changed);
162 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
166 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
167 if (!sdata->u.mesh.rmc)
169 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
170 for (i = 0; i < RMC_BUCKETS; i++)
171 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
175 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
177 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
179 struct hlist_node *n;
182 if (!sdata->u.mesh.rmc)
185 for (i = 0; i < RMC_BUCKETS; i++) {
186 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
188 kmem_cache_free(rm_cache, p);
193 sdata->u.mesh.rmc = NULL;
197 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
200 * @sa: source address
201 * @mesh_hdr: mesh_header
203 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
205 * Checks using the source address and the mesh sequence number if we have
206 * received this frame lately. If the frame is not in the cache, it is added to
209 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
210 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
212 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
217 struct hlist_node *n;
222 /* Don't care about endianness since only match matters */
223 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
224 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
225 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
227 if (time_after(jiffies, p->exp_time) ||
228 entries == RMC_QUEUE_MAX_LEN) {
230 kmem_cache_free(rm_cache, p);
232 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
236 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
241 p->exp_time = jiffies + RMC_TIMEOUT;
242 memcpy(p->sa, sa, ETH_ALEN);
243 hlist_add_head(&p->list, &rmc->bucket[idx]);
247 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
250 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
252 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
254 if (skb_tailroom(skb) < 2 + meshconf_len)
257 pos = skb_put(skb, 2 + meshconf_len);
258 *pos++ = WLAN_EID_MESH_CONFIG;
259 *pos++ = meshconf_len;
261 /* save a pointer for quick updates in pre-tbtt */
262 ifmsh->meshconf_offset = pos - skb->data;
264 /* Active path selection protocol ID */
265 *pos++ = ifmsh->mesh_pp_id;
266 /* Active path selection metric ID */
267 *pos++ = ifmsh->mesh_pm_id;
268 /* Congestion control mode identifier */
269 *pos++ = ifmsh->mesh_cc_id;
270 /* Synchronization protocol identifier */
271 *pos++ = ifmsh->mesh_sp_id;
272 /* Authentication Protocol identifier */
273 *pos++ = ifmsh->mesh_auth_id;
274 /* Mesh Formation Info - number of neighbors */
275 neighbors = atomic_read(&ifmsh->estab_plinks);
276 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
277 *pos++ = neighbors << 1;
278 /* Mesh capability */
280 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
281 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
282 *pos |= ifmsh->accepting_plinks ?
283 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
284 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
285 *pos |= ifmsh->ps_peers_deep_sleep ?
286 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
290 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
292 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
295 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
298 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
299 *pos++ = WLAN_EID_MESH_ID;
300 *pos++ = ifmsh->mesh_id_len;
301 if (ifmsh->mesh_id_len)
302 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
307 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
310 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
313 /* see IEEE802.11-2012 13.14.6 */
314 if (ifmsh->ps_peers_light_sleep == 0 &&
315 ifmsh->ps_peers_deep_sleep == 0 &&
316 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
319 if (skb_tailroom(skb) < 4)
322 pos = skb_put(skb, 2 + 2);
323 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
325 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
330 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
333 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
337 if (!ifmsh->ie || !ifmsh->ie_len)
340 /* fast-forward to vendor IEs */
341 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
343 if (offset < ifmsh->ie_len) {
344 len = ifmsh->ie_len - offset;
345 data = ifmsh->ie + offset;
346 if (skb_tailroom(skb) < len)
348 memcpy(skb_put(skb, len), data, len);
354 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
356 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
360 if (!ifmsh->ie || !ifmsh->ie_len)
364 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
370 if (skb_tailroom(skb) < len)
372 memcpy(skb_put(skb, len), data, len);
377 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
380 struct ieee80211_chanctx_conf *chanctx_conf;
381 struct ieee80211_channel *chan;
384 if (skb_tailroom(skb) < 3)
388 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
389 if (WARN_ON(!chanctx_conf)) {
393 chan = chanctx_conf->def.chan;
396 pos = skb_put(skb, 2 + 1);
397 *pos++ = WLAN_EID_DS_PARAMS;
399 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
404 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
407 struct ieee80211_supported_band *sband;
410 sband = ieee80211_get_sband(sdata);
414 if (!sband->ht_cap.ht_supported ||
415 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
416 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
417 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
420 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
423 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
424 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
429 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
432 struct ieee80211_local *local = sdata->local;
433 struct ieee80211_chanctx_conf *chanctx_conf;
434 struct ieee80211_channel *channel;
435 struct ieee80211_supported_band *sband;
436 struct ieee80211_sta_ht_cap *ht_cap;
440 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
441 if (WARN_ON(!chanctx_conf)) {
445 channel = chanctx_conf->def.chan;
448 sband = local->hw.wiphy->bands[channel->band];
449 ht_cap = &sband->ht_cap;
451 if (!ht_cap->ht_supported ||
452 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
453 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
454 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
457 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
460 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
461 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
462 sdata->vif.bss_conf.ht_operation_mode,
468 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
471 struct ieee80211_supported_band *sband;
474 sband = ieee80211_get_sband(sdata);
478 if (!sband->vht_cap.vht_supported ||
479 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
480 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
481 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
484 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
487 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
488 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
493 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
496 struct ieee80211_local *local = sdata->local;
497 struct ieee80211_chanctx_conf *chanctx_conf;
498 struct ieee80211_channel *channel;
499 struct ieee80211_supported_band *sband;
500 struct ieee80211_sta_vht_cap *vht_cap;
504 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
505 if (WARN_ON(!chanctx_conf)) {
509 channel = chanctx_conf->def.chan;
512 sband = local->hw.wiphy->bands[channel->band];
513 vht_cap = &sband->vht_cap;
515 if (!vht_cap->vht_supported ||
516 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
517 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
518 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
521 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
524 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
525 ieee80211_ie_build_vht_oper(pos, vht_cap,
526 &sdata->vif.bss_conf.chandef);
531 static void ieee80211_mesh_path_timer(unsigned long data)
533 struct ieee80211_sub_if_data *sdata =
534 (struct ieee80211_sub_if_data *) data;
536 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
539 static void ieee80211_mesh_path_root_timer(unsigned long data)
541 struct ieee80211_sub_if_data *sdata =
542 (struct ieee80211_sub_if_data *) data;
543 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
545 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
547 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
550 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
552 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
553 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
555 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
556 /* stop running timer */
557 del_timer_sync(&ifmsh->mesh_path_root_timer);
562 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
563 * @hdr: 802.11 frame header
564 * @fc: frame control field
565 * @meshda: destination address in the mesh
566 * @meshsa: source address address in the mesh. Same as TA, as frame is
567 * locally originated.
569 * Return the length of the 802.11 (does not include a mesh control header)
571 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
572 const u8 *meshda, const u8 *meshsa)
574 if (is_multicast_ether_addr(meshda)) {
575 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
577 memcpy(hdr->addr1, meshda, ETH_ALEN);
578 memcpy(hdr->addr2, meshsa, ETH_ALEN);
579 memcpy(hdr->addr3, meshsa, ETH_ALEN);
582 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
584 eth_zero_addr(hdr->addr1); /* RA is resolved later */
585 memcpy(hdr->addr2, meshsa, ETH_ALEN);
586 memcpy(hdr->addr3, meshda, ETH_ALEN);
587 memcpy(hdr->addr4, meshsa, ETH_ALEN);
593 * ieee80211_new_mesh_header - create a new mesh header
594 * @sdata: mesh interface to be used
595 * @meshhdr: uninitialized mesh header
596 * @addr4or5: 1st address in the ae header, which may correspond to address 4
597 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
599 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
602 * Return the header length.
604 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
605 struct ieee80211s_hdr *meshhdr,
606 const char *addr4or5, const char *addr6)
608 if (WARN_ON(!addr4or5 && addr6))
611 memset(meshhdr, 0, sizeof(*meshhdr));
613 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
615 /* FIXME: racy -- TX on multiple queues can be concurrent */
616 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
617 sdata->u.mesh.mesh_seqnum++;
619 if (addr4or5 && !addr6) {
620 meshhdr->flags |= MESH_FLAGS_AE_A4;
621 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
623 } else if (addr4or5 && addr6) {
624 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
625 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
626 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
633 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
635 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
638 if (ifmsh->mshcfg.plink_timeout > 0)
639 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
640 mesh_path_expire(sdata);
642 changed = mesh_accept_plinks_update(sdata);
643 ieee80211_mbss_info_change_notify(sdata, changed);
645 mod_timer(&ifmsh->housekeeping_timer,
646 round_jiffies(jiffies +
647 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
650 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
652 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
655 mesh_path_tx_root_frame(sdata);
657 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
658 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
660 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
662 mod_timer(&ifmsh->mesh_path_root_timer,
663 round_jiffies(TU_TO_EXP_TIME(interval)));
667 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
669 struct beacon_data *bcn;
670 int head_len, tail_len;
672 struct ieee80211_mgmt *mgmt;
673 struct ieee80211_chanctx_conf *chanctx_conf;
674 struct mesh_csa_settings *csa;
675 enum nl80211_band band;
677 struct ieee80211_sub_if_data *sdata;
678 int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) +
679 sizeof(mgmt->u.beacon);
681 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
683 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
684 band = chanctx_conf->def.chan->band;
689 /* Channel Switch Announcement */
690 2 + sizeof(struct ieee80211_channel_sw_ie) +
691 /* Mesh Channel Switch Parameters */
692 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
693 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
694 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
695 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
696 2 + 8 + /* supported rates */
697 2 + 3; /* DS params */
698 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
699 2 + sizeof(struct ieee80211_ht_cap) +
700 2 + sizeof(struct ieee80211_ht_operation) +
701 2 + ifmsh->mesh_id_len +
702 2 + sizeof(struct ieee80211_meshconf_ie) +
703 2 + sizeof(__le16) + /* awake window */
704 2 + sizeof(struct ieee80211_vht_cap) +
705 2 + sizeof(struct ieee80211_vht_operation) +
708 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
709 /* need an skb for IE builders to operate on */
710 skb = dev_alloc_skb(max(head_len, tail_len));
716 * pointers go into the block we allocated,
717 * memory is | beacon_data | head | tail |
719 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
721 /* fill in the head */
722 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
723 memset(mgmt, 0, hdr_len);
724 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
725 IEEE80211_STYPE_BEACON);
726 eth_broadcast_addr(mgmt->da);
727 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
728 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
729 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
730 mgmt->u.beacon.beacon_int =
731 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
732 mgmt->u.beacon.capab_info |= cpu_to_le16(
733 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
735 pos = skb_put(skb, 2);
736 *pos++ = WLAN_EID_SSID;
740 csa = rcu_dereference(ifmsh->csa);
742 enum nl80211_channel_type ct;
743 struct cfg80211_chan_def *chandef;
744 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
745 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
747 pos = skb_put_zero(skb, ie_len);
748 *pos++ = WLAN_EID_CHANNEL_SWITCH;
751 *pos++ = ieee80211_frequency_to_channel(
752 csa->settings.chandef.chan->center_freq);
753 bcn->csa_current_counter = csa->settings.count;
754 bcn->csa_counter_offsets[0] = hdr_len + 6;
755 *pos++ = csa->settings.count;
756 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
758 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
759 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
760 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
762 *pos++ = ifmsh->chsw_ttl;
764 *pos++ |= csa->settings.block_tx ?
765 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
766 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
768 put_unaligned_le16(ifmsh->pre_value, pos);
771 switch (csa->settings.chandef.width) {
772 case NL80211_CHAN_WIDTH_40:
773 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
774 pos = skb_put_zero(skb, ie_len);
776 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
777 *pos++ = 1; /* len */
778 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
779 if (ct == NL80211_CHAN_HT40PLUS)
780 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
782 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
784 case NL80211_CHAN_WIDTH_80:
785 case NL80211_CHAN_WIDTH_80P80:
786 case NL80211_CHAN_WIDTH_160:
787 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
789 sizeof(struct ieee80211_wide_bw_chansw_ie);
790 pos = skb_put_zero(skb, ie_len);
792 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
793 *pos++ = 5; /* len */
795 chandef = &csa->settings.chandef;
796 ieee80211_ie_build_wide_bw_cs(pos, chandef);
804 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
805 mesh_add_ds_params_ie(sdata, skb))
808 bcn->head_len = skb->len;
809 memcpy(bcn->head, skb->data, bcn->head_len);
813 bcn->tail = bcn->head + bcn->head_len;
815 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
816 mesh_add_rsn_ie(sdata, skb) ||
817 mesh_add_ht_cap_ie(sdata, skb) ||
818 mesh_add_ht_oper_ie(sdata, skb) ||
819 mesh_add_meshid_ie(sdata, skb) ||
820 mesh_add_meshconf_ie(sdata, skb) ||
821 mesh_add_awake_window_ie(sdata, skb) ||
822 mesh_add_vht_cap_ie(sdata, skb) ||
823 mesh_add_vht_oper_ie(sdata, skb) ||
824 mesh_add_vendor_ies(sdata, skb))
827 bcn->tail_len = skb->len;
828 memcpy(bcn->tail, skb->data, bcn->tail_len);
829 bcn->meshconf = (struct ieee80211_meshconf_ie *)
830 (bcn->tail + ifmsh->meshconf_offset);
833 rcu_assign_pointer(ifmsh->beacon, bcn);
842 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
844 struct beacon_data *old_bcn;
847 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
848 lockdep_is_held(&sdata->wdev.mtx));
849 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
851 /* just reuse old beacon */
855 kfree_rcu(old_bcn, rcu_head);
859 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
862 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
863 unsigned long bits = changed;
869 /* if we race with running work, worst case this work becomes a noop */
870 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
871 set_bit(bit, &ifmsh->mbss_changed);
872 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
873 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
876 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
878 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
879 struct ieee80211_local *local = sdata->local;
880 u32 changed = BSS_CHANGED_BEACON |
881 BSS_CHANGED_BEACON_ENABLED |
883 BSS_CHANGED_BASIC_RATES |
884 BSS_CHANGED_BEACON_INT;
886 local->fif_other_bss++;
887 /* mesh ifaces must set allmulti to forward mcast traffic */
888 atomic_inc(&local->iff_allmultis);
889 ieee80211_configure_filter(local);
891 ifmsh->mesh_cc_id = 0; /* Disabled */
892 /* register sync ops from extensible synchronization framework */
893 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
894 ifmsh->sync_offset_clockdrift_max = 0;
895 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
896 ieee80211_mesh_root_setup(ifmsh);
897 ieee80211_queue_work(&local->hw, &sdata->work);
898 sdata->vif.bss_conf.ht_operation_mode =
899 ifmsh->mshcfg.ht_opmode;
900 sdata->vif.bss_conf.enable_beacon = true;
902 changed |= ieee80211_mps_local_status_update(sdata);
904 if (ieee80211_mesh_build_beacon(ifmsh)) {
905 ieee80211_stop_mesh(sdata);
909 ieee80211_recalc_dtim(local, sdata);
910 ieee80211_bss_info_change_notify(sdata, changed);
912 netif_carrier_on(sdata->dev);
916 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
918 struct ieee80211_local *local = sdata->local;
919 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
920 struct beacon_data *bcn;
922 netif_carrier_off(sdata->dev);
924 /* flush STAs and mpaths on this iface */
925 sta_info_flush(sdata);
926 mesh_path_flush_by_iface(sdata);
928 /* stop the beacon */
929 ifmsh->mesh_id_len = 0;
930 sdata->vif.bss_conf.enable_beacon = false;
931 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
932 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
935 bcn = rcu_dereference_protected(ifmsh->beacon,
936 lockdep_is_held(&sdata->wdev.mtx));
937 RCU_INIT_POINTER(ifmsh->beacon, NULL);
938 kfree_rcu(bcn, rcu_head);
940 /* free all potentially still buffered group-addressed frames */
941 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
942 skb_queue_purge(&ifmsh->ps.bc_buf);
944 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
945 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
946 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
948 /* clear any mesh work (for next join) we may have accrued */
949 ifmsh->wrkq_flags = 0;
950 ifmsh->mbss_changed = 0;
952 local->fif_other_bss--;
953 atomic_dec(&local->iff_allmultis);
954 ieee80211_configure_filter(local);
957 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
961 /* if the current channel is a DFS channel, mark the channel as
964 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
965 &sdata->vif.bss_conf.chandef,
966 NL80211_IFTYPE_MESH_POINT);
968 cfg80211_radar_event(sdata->local->hw.wiphy,
969 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
973 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
974 struct ieee802_11_elems *elems, bool beacon)
976 struct cfg80211_csa_settings params;
977 struct ieee80211_csa_ie csa_ie;
978 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
979 struct ieee80211_supported_band *sband;
983 sdata_assert_lock(sdata);
985 sband = ieee80211_get_sband(sdata);
990 switch (sdata->vif.bss_conf.chandef.width) {
991 case NL80211_CHAN_WIDTH_20_NOHT:
992 sta_flags |= IEEE80211_STA_DISABLE_HT;
993 case NL80211_CHAN_WIDTH_20:
994 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
995 case NL80211_CHAN_WIDTH_40:
996 sta_flags |= IEEE80211_STA_DISABLE_VHT;
1002 memset(¶ms, 0, sizeof(params));
1003 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1004 sta_flags, sdata->vif.addr,
1011 /* Mark the channel unavailable if the reason for the switch is
1014 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1015 ieee80211_mesh_csa_mark_radar(sdata);
1017 params.chandef = csa_ie.chandef;
1018 params.count = csa_ie.count;
1020 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1021 IEEE80211_CHAN_DISABLED) ||
1022 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1023 NL80211_IFTYPE_MESH_POINT)) {
1025 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1027 params.chandef.chan->center_freq,
1028 params.chandef.width,
1029 params.chandef.center_freq1,
1030 params.chandef.center_freq2);
1034 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1036 NL80211_IFTYPE_MESH_POINT);
1039 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1041 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1043 params.chandef.chan->center_freq,
1044 params.chandef.width,
1045 params.chandef.center_freq1,
1046 params.chandef.center_freq2);
1050 params.radar_required = err;
1052 if (cfg80211_chandef_identical(¶ms.chandef,
1053 &sdata->vif.bss_conf.chandef)) {
1055 "received csa with an identical chandef, ignoring\n");
1060 "received channel switch announcement to go to channel %d MHz\n",
1061 params.chandef.chan->center_freq);
1063 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1065 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1066 if (ifmsh->pre_value >= csa_ie.pre_value)
1068 ifmsh->pre_value = csa_ie.pre_value;
1071 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1074 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1076 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1084 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1085 struct ieee80211_mgmt *mgmt, size_t len)
1087 struct ieee80211_local *local = sdata->local;
1088 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1089 struct sk_buff *presp;
1090 struct beacon_data *bcn;
1091 struct ieee80211_mgmt *hdr;
1092 struct ieee802_11_elems elems;
1096 pos = mgmt->u.probe_req.variable;
1097 baselen = (u8 *) pos - (u8 *) mgmt;
1101 ieee802_11_parse_elems(pos, len - baselen, false, &elems);
1106 /* 802.11-2012 10.1.4.3.2 */
1107 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1108 !is_broadcast_ether_addr(mgmt->da)) ||
1109 elems.ssid_len != 0)
1112 if (elems.mesh_id_len != 0 &&
1113 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1114 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1118 bcn = rcu_dereference(ifmsh->beacon);
1123 presp = dev_alloc_skb(local->tx_headroom +
1124 bcn->head_len + bcn->tail_len);
1128 skb_reserve(presp, local->tx_headroom);
1129 memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len);
1130 memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len);
1131 hdr = (struct ieee80211_mgmt *) presp->data;
1132 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1133 IEEE80211_STYPE_PROBE_RESP);
1134 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1135 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1136 ieee80211_tx_skb(sdata, presp);
1141 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1143 struct ieee80211_mgmt *mgmt,
1145 struct ieee80211_rx_status *rx_status)
1147 struct ieee80211_local *local = sdata->local;
1148 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1149 struct ieee802_11_elems elems;
1150 struct ieee80211_channel *channel;
1153 enum nl80211_band band = rx_status->band;
1155 /* ignore ProbeResp to foreign address */
1156 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1157 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1160 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1164 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1167 /* ignore non-mesh or secure / unsecure mismatch */
1168 if ((!elems.mesh_id || !elems.mesh_config) ||
1169 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1170 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1173 if (elems.ds_params)
1174 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1176 freq = rx_status->freq;
1178 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1180 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1183 if (mesh_matches_local(sdata, &elems)) {
1184 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1185 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1186 if (!sdata->u.mesh.user_mpm ||
1187 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1188 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1189 mesh_neighbour_update(sdata, mgmt->sa, &elems);
1192 if (ifmsh->sync_ops)
1193 ifmsh->sync_ops->rx_bcn_presp(sdata,
1194 stype, mgmt, &elems, rx_status);
1196 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1197 !sdata->vif.csa_active)
1198 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1201 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1203 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1204 struct mesh_csa_settings *tmp_csa_settings;
1208 /* Reset the TTL value and Initiator flag */
1209 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1210 ifmsh->chsw_ttl = 0;
1212 /* Remove the CSA and MCSP elements from the beacon */
1213 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1214 RCU_INIT_POINTER(ifmsh->csa, NULL);
1215 if (tmp_csa_settings)
1216 kfree_rcu(tmp_csa_settings, rcu_head);
1217 ret = ieee80211_mesh_rebuild_beacon(sdata);
1221 changed |= BSS_CHANGED_BEACON;
1223 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1224 sdata->vif.bss_conf.chandef.chan->center_freq);
1228 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1229 struct cfg80211_csa_settings *csa_settings)
1231 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1232 struct mesh_csa_settings *tmp_csa_settings;
1235 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1237 if (!tmp_csa_settings)
1240 memcpy(&tmp_csa_settings->settings, csa_settings,
1241 sizeof(struct cfg80211_csa_settings));
1243 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1245 ret = ieee80211_mesh_rebuild_beacon(sdata);
1247 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1248 RCU_INIT_POINTER(ifmsh->csa, NULL);
1249 kfree_rcu(tmp_csa_settings, rcu_head);
1253 return BSS_CHANGED_BEACON;
1256 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1257 struct ieee80211_mgmt *mgmt, size_t len)
1259 struct ieee80211_mgmt *mgmt_fwd;
1260 struct sk_buff *skb;
1261 struct ieee80211_local *local = sdata->local;
1262 u8 *pos = mgmt->u.action.u.chan_switch.variable;
1265 skb = dev_alloc_skb(local->tx_headroom + len);
1268 skb_reserve(skb, local->tx_headroom);
1269 mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len);
1271 /* offset_ttl is based on whether the secondary channel
1272 * offset is available or not. Subtract 1 from the mesh TTL
1273 * and disable the initiator flag before forwarding.
1275 offset_ttl = (len < 42) ? 7 : 10;
1276 *(pos + offset_ttl) -= 1;
1277 *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1279 memcpy(mgmt_fwd, mgmt, len);
1280 eth_broadcast_addr(mgmt_fwd->da);
1281 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1282 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1284 ieee80211_tx_skb(sdata, skb);
1288 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1289 struct ieee80211_mgmt *mgmt, size_t len)
1291 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1292 struct ieee802_11_elems elems;
1294 bool fwd_csa = true;
1298 if (mgmt->u.action.u.measurement.action_code !=
1299 WLAN_ACTION_SPCT_CHL_SWITCH)
1302 pos = mgmt->u.action.u.chan_switch.variable;
1303 baselen = offsetof(struct ieee80211_mgmt,
1304 u.action.u.chan_switch.variable);
1305 ieee802_11_parse_elems(pos, len - baselen, true, &elems);
1307 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1308 if (!--ifmsh->chsw_ttl)
1311 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1312 if (ifmsh->pre_value >= pre_value)
1315 ifmsh->pre_value = pre_value;
1317 if (!sdata->vif.csa_active &&
1318 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1319 mcsa_dbg(sdata, "Failed to process CSA action frame");
1323 /* forward or re-broadcast the CSA frame */
1325 if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0)
1326 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1330 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1331 struct ieee80211_mgmt *mgmt,
1333 struct ieee80211_rx_status *rx_status)
1335 switch (mgmt->u.action.category) {
1336 case WLAN_CATEGORY_SELF_PROTECTED:
1337 switch (mgmt->u.action.u.self_prot.action_code) {
1338 case WLAN_SP_MESH_PEERING_OPEN:
1339 case WLAN_SP_MESH_PEERING_CLOSE:
1340 case WLAN_SP_MESH_PEERING_CONFIRM:
1341 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1345 case WLAN_CATEGORY_MESH_ACTION:
1346 if (mesh_action_is_path_sel(mgmt))
1347 mesh_rx_path_sel_frame(sdata, mgmt, len);
1349 case WLAN_CATEGORY_SPECTRUM_MGMT:
1350 mesh_rx_csa_frame(sdata, mgmt, len);
1355 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1356 struct sk_buff *skb)
1358 struct ieee80211_rx_status *rx_status;
1359 struct ieee80211_mgmt *mgmt;
1364 /* mesh already went down */
1365 if (!sdata->u.mesh.mesh_id_len)
1368 rx_status = IEEE80211_SKB_RXCB(skb);
1369 mgmt = (struct ieee80211_mgmt *) skb->data;
1370 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1373 case IEEE80211_STYPE_PROBE_RESP:
1374 case IEEE80211_STYPE_BEACON:
1375 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1378 case IEEE80211_STYPE_PROBE_REQ:
1379 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1381 case IEEE80211_STYPE_ACTION:
1382 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1386 sdata_unlock(sdata);
1389 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1391 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1392 u32 bit, changed = 0;
1394 for_each_set_bit(bit, &ifmsh->mbss_changed,
1395 sizeof(changed) * BITS_PER_BYTE) {
1396 clear_bit(bit, &ifmsh->mbss_changed);
1397 changed |= BIT(bit);
1400 if (sdata->vif.bss_conf.enable_beacon &&
1401 (changed & (BSS_CHANGED_BEACON |
1403 BSS_CHANGED_BASIC_RATES |
1404 BSS_CHANGED_BEACON_INT)))
1405 if (ieee80211_mesh_rebuild_beacon(sdata))
1408 ieee80211_bss_info_change_notify(sdata, changed);
1411 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1413 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1417 /* mesh already went down */
1418 if (!sdata->u.mesh.mesh_id_len)
1421 if (ifmsh->preq_queue_len &&
1423 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1424 mesh_path_start_discovery(sdata);
1426 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1427 ieee80211_mesh_housekeeping(sdata);
1429 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1430 ieee80211_mesh_rootpath(sdata);
1432 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1433 mesh_sync_adjust_tsf(sdata);
1435 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1436 mesh_bss_info_changed(sdata);
1438 sdata_unlock(sdata);
1442 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1444 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1445 static u8 zero_addr[ETH_ALEN] = {};
1447 setup_timer(&ifmsh->housekeeping_timer,
1448 ieee80211_mesh_housekeeping_timer,
1449 (unsigned long) sdata);
1451 ifmsh->accepting_plinks = true;
1452 atomic_set(&ifmsh->mpaths, 0);
1453 mesh_rmc_init(sdata);
1454 ifmsh->last_preq = jiffies;
1455 ifmsh->next_perr = jiffies;
1456 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1457 /* Allocate all mesh structures when creating the first mesh interface. */
1458 if (!mesh_allocated)
1461 mesh_pathtbl_init(sdata);
1463 setup_timer(&ifmsh->mesh_path_timer,
1464 ieee80211_mesh_path_timer,
1465 (unsigned long) sdata);
1466 setup_timer(&ifmsh->mesh_path_root_timer,
1467 ieee80211_mesh_path_root_timer,
1468 (unsigned long) sdata);
1469 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1470 skb_queue_head_init(&ifmsh->ps.bc_buf);
1471 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1472 spin_lock_init(&ifmsh->sync_offset_lock);
1473 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1475 sdata->vif.bss_conf.bssid = zero_addr;
1478 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1480 mesh_rmc_free(sdata);
1481 mesh_pathtbl_unregister(sdata);