1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Copyright (C) 2018 - 2020 Intel Corporation
5 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
6 * Javier Cardona <javier@cozybit.com>
9 #include <linux/slab.h>
10 #include <asm/unaligned.h>
11 #include "ieee80211_i.h"
13 #include "driver-ops.h"
15 static int mesh_allocated;
16 static struct kmem_cache *rm_cache;
18 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
20 return (mgmt->u.action.u.mesh_action.action_code ==
21 WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
24 void ieee80211s_init(void)
27 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
31 void ieee80211s_stop(void)
35 kmem_cache_destroy(rm_cache);
38 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
40 struct ieee80211_sub_if_data *sdata =
41 from_timer(sdata, t, u.mesh.housekeeping_timer);
42 struct ieee80211_local *local = sdata->local;
43 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
45 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
47 ieee80211_queue_work(&local->hw, &sdata->work);
51 * mesh_matches_local - check if the config of a mesh point matches ours
53 * @sdata: local mesh subif
54 * @ie: information elements of a management frame from the mesh peer
56 * This function checks if the mesh configuration of a mesh point matches the
57 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
59 bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
60 struct ieee802_11_elems *ie)
62 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
64 struct cfg80211_chan_def sta_chan_def;
65 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);
101 if (ie->vht_cap_elem)
102 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info);
104 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
105 ie->vht_operation, ie->ht_operation,
107 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, &sta_chan_def);
109 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
117 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
119 * @ie: information elements of a management frame from the mesh peer
121 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
123 return (ie->mesh_config->meshconf_cap &
124 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
128 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
130 * @sdata: mesh interface in which mesh beacons are going to be updated
132 * Returns: beacon changed flag if the beacon content changed.
134 u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
139 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
140 * the mesh interface might be able to establish plinks with peers that
141 * are already on the table but are not on PLINK_ESTAB state. However,
142 * in general the mesh interface is not accepting peer link requests
143 * from new peers, and that must be reflected in the beacon
145 free_plinks = mesh_plink_availables(sdata);
147 if (free_plinks != sdata->u.mesh.accepting_plinks) {
148 sdata->u.mesh.accepting_plinks = free_plinks;
149 changed = BSS_CHANGED_BEACON;
156 * mesh_sta_cleanup - clean up any mesh sta state
158 * @sta: mesh sta to clean up.
160 void mesh_sta_cleanup(struct sta_info *sta)
162 struct ieee80211_sub_if_data *sdata = sta->sdata;
163 u32 changed = mesh_plink_deactivate(sta);
166 ieee80211_mbss_info_change_notify(sdata, changed);
169 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
173 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
174 if (!sdata->u.mesh.rmc)
176 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
177 for (i = 0; i < RMC_BUCKETS; i++)
178 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
182 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
184 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
186 struct hlist_node *n;
189 if (!sdata->u.mesh.rmc)
192 for (i = 0; i < RMC_BUCKETS; i++) {
193 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
195 kmem_cache_free(rm_cache, p);
200 sdata->u.mesh.rmc = NULL;
204 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
207 * @sa: source address
208 * @mesh_hdr: mesh_header
210 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
212 * Checks using the source address and the mesh sequence number if we have
213 * received this frame lately. If the frame is not in the cache, it is added to
216 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
217 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
219 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
224 struct hlist_node *n;
229 /* Don't care about endianness since only match matters */
230 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
231 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
232 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
234 if (time_after(jiffies, p->exp_time) ||
235 entries == RMC_QUEUE_MAX_LEN) {
237 kmem_cache_free(rm_cache, p);
239 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
243 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
248 p->exp_time = jiffies + RMC_TIMEOUT;
249 memcpy(p->sa, sa, ETH_ALEN);
250 hlist_add_head(&p->list, &rmc->bucket[idx]);
254 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
257 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
259 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
260 bool is_connected_to_gate = ifmsh->num_gates > 0 ||
261 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol ||
262 ifmsh->mshcfg.dot11MeshConnectedToMeshGate;
263 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer;
265 if (skb_tailroom(skb) < 2 + meshconf_len)
268 pos = skb_put(skb, 2 + meshconf_len);
269 *pos++ = WLAN_EID_MESH_CONFIG;
270 *pos++ = meshconf_len;
272 /* save a pointer for quick updates in pre-tbtt */
273 ifmsh->meshconf_offset = pos - skb->data;
275 /* Active path selection protocol ID */
276 *pos++ = ifmsh->mesh_pp_id;
277 /* Active path selection metric ID */
278 *pos++ = ifmsh->mesh_pm_id;
279 /* Congestion control mode identifier */
280 *pos++ = ifmsh->mesh_cc_id;
281 /* Synchronization protocol identifier */
282 *pos++ = ifmsh->mesh_sp_id;
283 /* Authentication Protocol identifier */
284 *pos++ = ifmsh->mesh_auth_id;
285 /* Mesh Formation Info - number of neighbors */
286 neighbors = atomic_read(&ifmsh->estab_plinks);
287 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
288 *pos++ = (is_connected_to_as << 7) |
290 is_connected_to_gate;
291 /* Mesh capability */
293 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
294 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
295 *pos |= ifmsh->accepting_plinks ?
296 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
297 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
298 *pos |= ifmsh->ps_peers_deep_sleep ?
299 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
303 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
305 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
308 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
311 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
312 *pos++ = WLAN_EID_MESH_ID;
313 *pos++ = ifmsh->mesh_id_len;
314 if (ifmsh->mesh_id_len)
315 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
320 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
323 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
326 /* see IEEE802.11-2012 13.14.6 */
327 if (ifmsh->ps_peers_light_sleep == 0 &&
328 ifmsh->ps_peers_deep_sleep == 0 &&
329 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
332 if (skb_tailroom(skb) < 4)
335 pos = skb_put(skb, 2 + 2);
336 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
338 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
343 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
346 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
350 if (!ifmsh->ie || !ifmsh->ie_len)
353 /* fast-forward to vendor IEs */
354 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
356 if (offset < ifmsh->ie_len) {
357 len = ifmsh->ie_len - offset;
358 data = ifmsh->ie + offset;
359 if (skb_tailroom(skb) < len)
361 skb_put_data(skb, data, len);
367 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
369 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
373 if (!ifmsh->ie || !ifmsh->ie_len)
377 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
383 if (skb_tailroom(skb) < len)
385 skb_put_data(skb, data, len);
390 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
393 struct ieee80211_chanctx_conf *chanctx_conf;
394 struct ieee80211_channel *chan;
397 if (skb_tailroom(skb) < 3)
401 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
402 if (WARN_ON(!chanctx_conf)) {
406 chan = chanctx_conf->def.chan;
409 pos = skb_put(skb, 2 + 1);
410 *pos++ = WLAN_EID_DS_PARAMS;
412 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
417 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
420 struct ieee80211_supported_band *sband;
423 sband = ieee80211_get_sband(sdata);
427 /* HT not allowed in 6 GHz */
428 if (sband->band == NL80211_BAND_6GHZ)
431 if (!sband->ht_cap.ht_supported ||
432 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
433 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
434 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
437 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
440 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
441 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
446 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
449 struct ieee80211_local *local = sdata->local;
450 struct ieee80211_chanctx_conf *chanctx_conf;
451 struct ieee80211_channel *channel;
452 struct ieee80211_supported_band *sband;
453 struct ieee80211_sta_ht_cap *ht_cap;
457 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
458 if (WARN_ON(!chanctx_conf)) {
462 channel = chanctx_conf->def.chan;
465 sband = local->hw.wiphy->bands[channel->band];
466 ht_cap = &sband->ht_cap;
468 /* HT not allowed in 6 GHz */
469 if (sband->band == NL80211_BAND_6GHZ)
472 if (!ht_cap->ht_supported ||
473 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
474 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
475 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
478 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
481 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
482 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
483 sdata->vif.bss_conf.ht_operation_mode,
489 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
492 struct ieee80211_supported_band *sband;
495 sband = ieee80211_get_sband(sdata);
499 /* VHT not allowed in 6 GHz */
500 if (sband->band == NL80211_BAND_6GHZ)
503 if (!sband->vht_cap.vht_supported ||
504 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
505 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
506 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
509 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
512 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
513 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
518 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
521 struct ieee80211_local *local = sdata->local;
522 struct ieee80211_chanctx_conf *chanctx_conf;
523 struct ieee80211_channel *channel;
524 struct ieee80211_supported_band *sband;
525 struct ieee80211_sta_vht_cap *vht_cap;
529 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
530 if (WARN_ON(!chanctx_conf)) {
534 channel = chanctx_conf->def.chan;
537 sband = local->hw.wiphy->bands[channel->band];
538 vht_cap = &sband->vht_cap;
540 /* VHT not allowed in 6 GHz */
541 if (sband->band == NL80211_BAND_6GHZ)
544 if (!vht_cap->vht_supported ||
545 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
546 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
547 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
550 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
553 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
554 ieee80211_ie_build_vht_oper(pos, vht_cap,
555 &sdata->vif.bss_conf.chandef);
560 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
561 struct sk_buff *skb, u8 ie_len)
563 const struct ieee80211_sta_he_cap *he_cap;
564 struct ieee80211_supported_band *sband;
567 sband = ieee80211_get_sband(sdata);
571 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
574 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
575 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
576 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
579 if (skb_tailroom(skb) < ie_len)
582 pos = skb_put(skb, ie_len);
583 ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);
588 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
591 const struct ieee80211_sta_he_cap *he_cap;
592 struct ieee80211_supported_band *sband;
596 sband = ieee80211_get_sband(sdata);
600 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
602 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
603 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
604 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
607 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
608 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
609 len += sizeof(struct ieee80211_he_6ghz_oper);
611 if (skb_tailroom(skb) < len)
614 pos = skb_put(skb, len);
615 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef);
620 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
623 ieee80211_ie_build_he_6ghz_cap(sdata, skb);
627 static void ieee80211_mesh_path_timer(struct timer_list *t)
629 struct ieee80211_sub_if_data *sdata =
630 from_timer(sdata, t, u.mesh.mesh_path_timer);
632 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
635 static void ieee80211_mesh_path_root_timer(struct timer_list *t)
637 struct ieee80211_sub_if_data *sdata =
638 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
639 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
641 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
643 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
646 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
648 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
649 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
651 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
652 /* stop running timer */
653 del_timer_sync(&ifmsh->mesh_path_root_timer);
658 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
659 * @hdr: 802.11 frame header
660 * @fc: frame control field
661 * @meshda: destination address in the mesh
662 * @meshsa: source address address in the mesh. Same as TA, as frame is
663 * locally originated.
665 * Return the length of the 802.11 (does not include a mesh control header)
667 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
668 const u8 *meshda, const u8 *meshsa)
670 if (is_multicast_ether_addr(meshda)) {
671 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
673 memcpy(hdr->addr1, meshda, ETH_ALEN);
674 memcpy(hdr->addr2, meshsa, ETH_ALEN);
675 memcpy(hdr->addr3, meshsa, ETH_ALEN);
678 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
680 eth_zero_addr(hdr->addr1); /* RA is resolved later */
681 memcpy(hdr->addr2, meshsa, ETH_ALEN);
682 memcpy(hdr->addr3, meshda, ETH_ALEN);
683 memcpy(hdr->addr4, meshsa, ETH_ALEN);
689 * ieee80211_new_mesh_header - create a new mesh header
690 * @sdata: mesh interface to be used
691 * @meshhdr: uninitialized mesh header
692 * @addr4or5: 1st address in the ae header, which may correspond to address 4
693 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
695 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
698 * Return the header length.
700 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
701 struct ieee80211s_hdr *meshhdr,
702 const char *addr4or5, const char *addr6)
704 if (WARN_ON(!addr4or5 && addr6))
707 memset(meshhdr, 0, sizeof(*meshhdr));
709 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
711 /* FIXME: racy -- TX on multiple queues can be concurrent */
712 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
713 sdata->u.mesh.mesh_seqnum++;
715 if (addr4or5 && !addr6) {
716 meshhdr->flags |= MESH_FLAGS_AE_A4;
717 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
719 } else if (addr4or5 && addr6) {
720 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
721 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
722 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
729 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
731 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
734 if (ifmsh->mshcfg.plink_timeout > 0)
735 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
736 mesh_path_expire(sdata);
738 changed = mesh_accept_plinks_update(sdata);
739 ieee80211_mbss_info_change_notify(sdata, changed);
741 mod_timer(&ifmsh->housekeeping_timer,
742 round_jiffies(jiffies +
743 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
746 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
748 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
751 mesh_path_tx_root_frame(sdata);
753 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
754 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
756 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
758 mod_timer(&ifmsh->mesh_path_root_timer,
759 round_jiffies(TU_TO_EXP_TIME(interval)));
763 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
765 struct beacon_data *bcn;
766 int head_len, tail_len;
768 struct ieee80211_mgmt *mgmt;
769 struct ieee80211_chanctx_conf *chanctx_conf;
770 struct mesh_csa_settings *csa;
771 enum nl80211_band band;
774 struct ieee80211_sub_if_data *sdata;
775 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
777 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
779 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
780 band = chanctx_conf->def.chan->band;
783 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
784 NL80211_IFTYPE_MESH_POINT);
787 /* Channel Switch Announcement */
788 2 + sizeof(struct ieee80211_channel_sw_ie) +
789 /* Mesh Channel Switch Parameters */
790 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
791 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
792 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
793 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
794 2 + 8 + /* supported rates */
795 2 + 3; /* DS params */
796 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
797 2 + sizeof(struct ieee80211_ht_cap) +
798 2 + sizeof(struct ieee80211_ht_operation) +
799 2 + ifmsh->mesh_id_len +
800 2 + sizeof(struct ieee80211_meshconf_ie) +
801 2 + sizeof(__le16) + /* awake window */
802 2 + sizeof(struct ieee80211_vht_cap) +
803 2 + sizeof(struct ieee80211_vht_operation) +
805 2 + 1 + sizeof(struct ieee80211_he_operation) +
806 sizeof(struct ieee80211_he_6ghz_oper) +
807 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
810 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
811 /* need an skb for IE builders to operate on */
812 skb = dev_alloc_skb(max(head_len, tail_len));
818 * pointers go into the block we allocated,
819 * memory is | beacon_data | head | tail |
821 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
823 /* fill in the head */
824 mgmt = skb_put_zero(skb, hdr_len);
825 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
826 IEEE80211_STYPE_BEACON);
827 eth_broadcast_addr(mgmt->da);
828 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
829 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
830 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
831 mgmt->u.beacon.beacon_int =
832 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
833 mgmt->u.beacon.capab_info |= cpu_to_le16(
834 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
836 pos = skb_put(skb, 2);
837 *pos++ = WLAN_EID_SSID;
841 csa = rcu_dereference(ifmsh->csa);
843 enum nl80211_channel_type ct;
844 struct cfg80211_chan_def *chandef;
845 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
846 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
848 pos = skb_put_zero(skb, ie_len);
849 *pos++ = WLAN_EID_CHANNEL_SWITCH;
852 *pos++ = ieee80211_frequency_to_channel(
853 csa->settings.chandef.chan->center_freq);
854 bcn->csa_current_counter = csa->settings.count;
855 bcn->csa_counter_offsets[0] = hdr_len + 6;
856 *pos++ = csa->settings.count;
857 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
859 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
860 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
861 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
863 *pos++ = ifmsh->chsw_ttl;
865 *pos++ |= csa->settings.block_tx ?
866 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
867 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
869 put_unaligned_le16(ifmsh->pre_value, pos);
872 switch (csa->settings.chandef.width) {
873 case NL80211_CHAN_WIDTH_40:
874 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
875 pos = skb_put_zero(skb, ie_len);
877 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
878 *pos++ = 1; /* len */
879 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
880 if (ct == NL80211_CHAN_HT40PLUS)
881 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
883 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
885 case NL80211_CHAN_WIDTH_80:
886 case NL80211_CHAN_WIDTH_80P80:
887 case NL80211_CHAN_WIDTH_160:
888 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
890 sizeof(struct ieee80211_wide_bw_chansw_ie);
891 pos = skb_put_zero(skb, ie_len);
893 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
894 *pos++ = 5; /* len */
896 chandef = &csa->settings.chandef;
897 ieee80211_ie_build_wide_bw_cs(pos, chandef);
905 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
906 mesh_add_ds_params_ie(sdata, skb))
909 bcn->head_len = skb->len;
910 memcpy(bcn->head, skb->data, bcn->head_len);
914 bcn->tail = bcn->head + bcn->head_len;
916 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
917 mesh_add_rsn_ie(sdata, skb) ||
918 mesh_add_ht_cap_ie(sdata, skb) ||
919 mesh_add_ht_oper_ie(sdata, skb) ||
920 mesh_add_meshid_ie(sdata, skb) ||
921 mesh_add_meshconf_ie(sdata, skb) ||
922 mesh_add_awake_window_ie(sdata, skb) ||
923 mesh_add_vht_cap_ie(sdata, skb) ||
924 mesh_add_vht_oper_ie(sdata, skb) ||
925 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
926 mesh_add_he_oper_ie(sdata, skb) ||
927 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
928 mesh_add_vendor_ies(sdata, skb))
931 bcn->tail_len = skb->len;
932 memcpy(bcn->tail, skb->data, bcn->tail_len);
933 bcn->meshconf = (struct ieee80211_meshconf_ie *)
934 (bcn->tail + ifmsh->meshconf_offset);
937 rcu_assign_pointer(ifmsh->beacon, bcn);
946 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
948 struct beacon_data *old_bcn;
951 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
952 lockdep_is_held(&sdata->wdev.mtx));
953 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
955 /* just reuse old beacon */
959 kfree_rcu(old_bcn, rcu_head);
963 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
966 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
967 unsigned long bits = changed;
973 /* if we race with running work, worst case this work becomes a noop */
974 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
975 set_bit(bit, &ifmsh->mbss_changed);
976 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
977 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
980 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
982 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
983 struct ieee80211_local *local = sdata->local;
984 u32 changed = BSS_CHANGED_BEACON |
985 BSS_CHANGED_BEACON_ENABLED |
987 BSS_CHANGED_BASIC_RATES |
988 BSS_CHANGED_BEACON_INT |
989 BSS_CHANGED_MCAST_RATE;
991 local->fif_other_bss++;
992 /* mesh ifaces must set allmulti to forward mcast traffic */
993 atomic_inc(&local->iff_allmultis);
994 ieee80211_configure_filter(local);
996 ifmsh->mesh_cc_id = 0; /* Disabled */
997 /* register sync ops from extensible synchronization framework */
998 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
999 ifmsh->sync_offset_clockdrift_max = 0;
1000 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
1001 ieee80211_mesh_root_setup(ifmsh);
1002 ieee80211_queue_work(&local->hw, &sdata->work);
1003 sdata->vif.bss_conf.ht_operation_mode =
1004 ifmsh->mshcfg.ht_opmode;
1005 sdata->vif.bss_conf.enable_beacon = true;
1007 changed |= ieee80211_mps_local_status_update(sdata);
1009 if (ieee80211_mesh_build_beacon(ifmsh)) {
1010 ieee80211_stop_mesh(sdata);
1014 ieee80211_recalc_dtim(local, sdata);
1015 ieee80211_bss_info_change_notify(sdata, changed);
1017 netif_carrier_on(sdata->dev);
1021 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1023 struct ieee80211_local *local = sdata->local;
1024 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1025 struct beacon_data *bcn;
1027 netif_carrier_off(sdata->dev);
1029 /* flush STAs and mpaths on this iface */
1030 sta_info_flush(sdata);
1031 ieee80211_free_keys(sdata, true);
1032 mesh_path_flush_by_iface(sdata);
1034 /* stop the beacon */
1035 ifmsh->mesh_id_len = 0;
1036 sdata->vif.bss_conf.enable_beacon = false;
1037 sdata->beacon_rate_set = false;
1038 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
1039 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
1042 bcn = rcu_dereference_protected(ifmsh->beacon,
1043 lockdep_is_held(&sdata->wdev.mtx));
1044 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1045 kfree_rcu(bcn, rcu_head);
1047 /* free all potentially still buffered group-addressed frames */
1048 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1049 skb_queue_purge(&ifmsh->ps.bc_buf);
1051 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
1052 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
1053 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
1055 /* clear any mesh work (for next join) we may have accrued */
1056 ifmsh->wrkq_flags = 0;
1057 ifmsh->mbss_changed = 0;
1059 local->fif_other_bss--;
1060 atomic_dec(&local->iff_allmultis);
1061 ieee80211_configure_filter(local);
1064 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1068 /* if the current channel is a DFS channel, mark the channel as
1071 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1072 &sdata->vif.bss_conf.chandef,
1073 NL80211_IFTYPE_MESH_POINT);
1075 cfg80211_radar_event(sdata->local->hw.wiphy,
1076 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
1080 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1081 struct ieee802_11_elems *elems, bool beacon)
1083 struct cfg80211_csa_settings params;
1084 struct ieee80211_csa_ie csa_ie;
1085 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1086 struct ieee80211_supported_band *sband;
1088 u32 sta_flags, vht_cap_info = 0;
1090 sdata_assert_lock(sdata);
1092 sband = ieee80211_get_sband(sdata);
1097 switch (sdata->vif.bss_conf.chandef.width) {
1098 case NL80211_CHAN_WIDTH_20_NOHT:
1099 sta_flags |= IEEE80211_STA_DISABLE_HT;
1101 case NL80211_CHAN_WIDTH_20:
1102 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
1104 case NL80211_CHAN_WIDTH_40:
1105 sta_flags |= IEEE80211_STA_DISABLE_VHT;
1111 if (elems->vht_cap_elem)
1113 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1115 memset(¶ms, 0, sizeof(params));
1116 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1118 sta_flags, sdata->vif.addr,
1125 /* Mark the channel unavailable if the reason for the switch is
1128 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1129 ieee80211_mesh_csa_mark_radar(sdata);
1131 params.chandef = csa_ie.chandef;
1132 params.count = csa_ie.count;
1134 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1135 IEEE80211_CHAN_DISABLED) ||
1136 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1137 NL80211_IFTYPE_MESH_POINT)) {
1139 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1141 params.chandef.chan->center_freq,
1142 params.chandef.width,
1143 params.chandef.center_freq1,
1144 params.chandef.center_freq2);
1148 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1150 NL80211_IFTYPE_MESH_POINT);
1153 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1155 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1157 params.chandef.chan->center_freq,
1158 params.chandef.width,
1159 params.chandef.center_freq1,
1160 params.chandef.center_freq2);
1164 params.radar_required = err;
1166 if (cfg80211_chandef_identical(¶ms.chandef,
1167 &sdata->vif.bss_conf.chandef)) {
1169 "received csa with an identical chandef, ignoring\n");
1174 "received channel switch announcement to go to channel %d MHz\n",
1175 params.chandef.chan->center_freq);
1177 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1179 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1180 if (ifmsh->pre_value >= csa_ie.pre_value)
1182 ifmsh->pre_value = csa_ie.pre_value;
1185 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1188 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1190 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1198 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1199 struct ieee80211_mgmt *mgmt, size_t len)
1201 struct ieee80211_local *local = sdata->local;
1202 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1203 struct sk_buff *presp;
1204 struct beacon_data *bcn;
1205 struct ieee80211_mgmt *hdr;
1206 struct ieee802_11_elems elems;
1210 pos = mgmt->u.probe_req.variable;
1211 baselen = (u8 *) pos - (u8 *) mgmt;
1215 ieee802_11_parse_elems(pos, len - baselen, false, &elems, mgmt->bssid,
1221 /* 802.11-2012 10.1.4.3.2 */
1222 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1223 !is_broadcast_ether_addr(mgmt->da)) ||
1224 elems.ssid_len != 0)
1227 if (elems.mesh_id_len != 0 &&
1228 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1229 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1233 bcn = rcu_dereference(ifmsh->beacon);
1238 presp = dev_alloc_skb(local->tx_headroom +
1239 bcn->head_len + bcn->tail_len);
1243 skb_reserve(presp, local->tx_headroom);
1244 skb_put_data(presp, bcn->head, bcn->head_len);
1245 skb_put_data(presp, bcn->tail, bcn->tail_len);
1246 hdr = (struct ieee80211_mgmt *) presp->data;
1247 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1248 IEEE80211_STYPE_PROBE_RESP);
1249 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1250 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1251 ieee80211_tx_skb(sdata, presp);
1256 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1258 struct ieee80211_mgmt *mgmt,
1260 struct ieee80211_rx_status *rx_status)
1262 struct ieee80211_local *local = sdata->local;
1263 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1264 struct ieee802_11_elems elems;
1265 struct ieee80211_channel *channel;
1268 enum nl80211_band band = rx_status->band;
1270 /* ignore ProbeResp to foreign address */
1271 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1272 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1275 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1279 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1280 false, &elems, mgmt->bssid, NULL);
1282 /* ignore non-mesh or secure / unsecure mismatch */
1283 if ((!elems.mesh_id || !elems.mesh_config) ||
1284 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1285 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1288 if (elems.ds_params)
1289 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1291 freq = rx_status->freq;
1293 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1295 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1298 if (mesh_matches_local(sdata, &elems)) {
1299 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1300 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1301 if (!sdata->u.mesh.user_mpm ||
1302 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1303 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1304 mesh_neighbour_update(sdata, mgmt->sa, &elems,
1307 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1308 !sdata->vif.csa_active)
1309 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1312 if (ifmsh->sync_ops)
1313 ifmsh->sync_ops->rx_bcn_presp(sdata,
1314 stype, mgmt, &elems, rx_status);
1317 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1319 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1320 struct mesh_csa_settings *tmp_csa_settings;
1324 /* Reset the TTL value and Initiator flag */
1325 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1326 ifmsh->chsw_ttl = 0;
1328 /* Remove the CSA and MCSP elements from the beacon */
1329 tmp_csa_settings = rcu_dereference_protected(ifmsh->csa,
1330 lockdep_is_held(&sdata->wdev.mtx));
1331 RCU_INIT_POINTER(ifmsh->csa, NULL);
1332 if (tmp_csa_settings)
1333 kfree_rcu(tmp_csa_settings, rcu_head);
1334 ret = ieee80211_mesh_rebuild_beacon(sdata);
1338 changed |= BSS_CHANGED_BEACON;
1340 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1341 sdata->vif.bss_conf.chandef.chan->center_freq);
1345 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1346 struct cfg80211_csa_settings *csa_settings)
1348 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1349 struct mesh_csa_settings *tmp_csa_settings;
1352 lockdep_assert_held(&sdata->wdev.mtx);
1354 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1356 if (!tmp_csa_settings)
1359 memcpy(&tmp_csa_settings->settings, csa_settings,
1360 sizeof(struct cfg80211_csa_settings));
1362 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1364 ret = ieee80211_mesh_rebuild_beacon(sdata);
1366 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1367 RCU_INIT_POINTER(ifmsh->csa, NULL);
1368 kfree_rcu(tmp_csa_settings, rcu_head);
1372 return BSS_CHANGED_BEACON;
1375 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1376 struct ieee80211_mgmt *mgmt, size_t len,
1377 struct ieee802_11_elems *elems)
1379 struct ieee80211_mgmt *mgmt_fwd;
1380 struct sk_buff *skb;
1381 struct ieee80211_local *local = sdata->local;
1383 skb = dev_alloc_skb(local->tx_headroom + len);
1386 skb_reserve(skb, local->tx_headroom);
1387 mgmt_fwd = skb_put(skb, len);
1389 elems->mesh_chansw_params_ie->mesh_ttl--;
1390 elems->mesh_chansw_params_ie->mesh_flags &=
1391 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1393 memcpy(mgmt_fwd, mgmt, len);
1394 eth_broadcast_addr(mgmt_fwd->da);
1395 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1396 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1398 ieee80211_tx_skb(sdata, skb);
1402 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1403 struct ieee80211_mgmt *mgmt, size_t len)
1405 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1406 struct ieee802_11_elems elems;
1408 bool fwd_csa = true;
1412 if (mgmt->u.action.u.measurement.action_code !=
1413 WLAN_ACTION_SPCT_CHL_SWITCH)
1416 pos = mgmt->u.action.u.chan_switch.variable;
1417 baselen = offsetof(struct ieee80211_mgmt,
1418 u.action.u.chan_switch.variable);
1419 ieee802_11_parse_elems(pos, len - baselen, true, &elems,
1422 if (!mesh_matches_local(sdata, &elems))
1425 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1426 if (!--ifmsh->chsw_ttl)
1429 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1430 if (ifmsh->pre_value >= pre_value)
1433 ifmsh->pre_value = pre_value;
1435 if (!sdata->vif.csa_active &&
1436 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1437 mcsa_dbg(sdata, "Failed to process CSA action frame");
1441 /* forward or re-broadcast the CSA frame */
1443 if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0)
1444 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1448 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1449 struct ieee80211_mgmt *mgmt,
1451 struct ieee80211_rx_status *rx_status)
1453 switch (mgmt->u.action.category) {
1454 case WLAN_CATEGORY_SELF_PROTECTED:
1455 switch (mgmt->u.action.u.self_prot.action_code) {
1456 case WLAN_SP_MESH_PEERING_OPEN:
1457 case WLAN_SP_MESH_PEERING_CLOSE:
1458 case WLAN_SP_MESH_PEERING_CONFIRM:
1459 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1463 case WLAN_CATEGORY_MESH_ACTION:
1464 if (mesh_action_is_path_sel(mgmt))
1465 mesh_rx_path_sel_frame(sdata, mgmt, len);
1467 case WLAN_CATEGORY_SPECTRUM_MGMT:
1468 mesh_rx_csa_frame(sdata, mgmt, len);
1473 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1474 struct sk_buff *skb)
1476 struct ieee80211_rx_status *rx_status;
1477 struct ieee80211_mgmt *mgmt;
1482 /* mesh already went down */
1483 if (!sdata->u.mesh.mesh_id_len)
1486 rx_status = IEEE80211_SKB_RXCB(skb);
1487 mgmt = (struct ieee80211_mgmt *) skb->data;
1488 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1491 case IEEE80211_STYPE_PROBE_RESP:
1492 case IEEE80211_STYPE_BEACON:
1493 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1496 case IEEE80211_STYPE_PROBE_REQ:
1497 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1499 case IEEE80211_STYPE_ACTION:
1500 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1504 sdata_unlock(sdata);
1507 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1509 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1510 u32 bit, changed = 0;
1512 for_each_set_bit(bit, &ifmsh->mbss_changed,
1513 sizeof(changed) * BITS_PER_BYTE) {
1514 clear_bit(bit, &ifmsh->mbss_changed);
1515 changed |= BIT(bit);
1518 if (sdata->vif.bss_conf.enable_beacon &&
1519 (changed & (BSS_CHANGED_BEACON |
1521 BSS_CHANGED_BASIC_RATES |
1522 BSS_CHANGED_BEACON_INT)))
1523 if (ieee80211_mesh_rebuild_beacon(sdata))
1526 ieee80211_bss_info_change_notify(sdata, changed);
1529 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1531 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1535 /* mesh already went down */
1536 if (!sdata->u.mesh.mesh_id_len)
1539 if (ifmsh->preq_queue_len &&
1541 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1542 mesh_path_start_discovery(sdata);
1544 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1545 ieee80211_mesh_housekeeping(sdata);
1547 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1548 ieee80211_mesh_rootpath(sdata);
1550 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1551 mesh_sync_adjust_tsf(sdata);
1553 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1554 mesh_bss_info_changed(sdata);
1556 sdata_unlock(sdata);
1560 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1562 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1563 static u8 zero_addr[ETH_ALEN] = {};
1565 timer_setup(&ifmsh->housekeeping_timer,
1566 ieee80211_mesh_housekeeping_timer, 0);
1568 ifmsh->accepting_plinks = true;
1569 atomic_set(&ifmsh->mpaths, 0);
1570 mesh_rmc_init(sdata);
1571 ifmsh->last_preq = jiffies;
1572 ifmsh->next_perr = jiffies;
1573 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1574 /* Allocate all mesh structures when creating the first mesh interface. */
1575 if (!mesh_allocated)
1578 mesh_pathtbl_init(sdata);
1580 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1581 timer_setup(&ifmsh->mesh_path_root_timer,
1582 ieee80211_mesh_path_root_timer, 0);
1583 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1584 skb_queue_head_init(&ifmsh->ps.bc_buf);
1585 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1586 spin_lock_init(&ifmsh->sync_offset_lock);
1587 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1589 sdata->vif.bss_conf.bssid = zero_addr;
1592 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1594 mesh_rmc_free(sdata);
1595 mesh_pathtbl_unregister(sdata);