1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Copyright (C) 2018 - 2023 Intel Corporation
9 #include <linux/slab.h>
10 #include <asm/unaligned.h>
11 #include "ieee80211_i.h"
14 #include "driver-ops.h"
16 static int mesh_allocated;
17 static struct kmem_cache *rm_cache;
19 bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt)
21 return (mgmt->u.action.u.mesh_action.action_code ==
22 WLAN_MESH_ACTION_HWMP_PATH_SELECTION);
25 void ieee80211s_init(void)
28 rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry),
32 void ieee80211s_stop(void)
36 kmem_cache_destroy(rm_cache);
39 static void ieee80211_mesh_housekeeping_timer(struct timer_list *t)
41 struct ieee80211_sub_if_data *sdata =
42 from_timer(sdata, t, u.mesh.housekeeping_timer);
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 wiphy_work_queue(local->hw.wiphy, &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 * Returns: %true if both nodes belong to the same mesh
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;
68 struct ieee80211_supported_band *sband;
72 * As support for each feature is added, check for matching
73 * - On mesh config capabilities
74 * - Power Save Support En
75 * - Sync support enabled
76 * - Sync support active
77 * - Sync support required from peer
79 * - Power management control on fc
81 if (!(ifmsh->mesh_id_len == ie->mesh_id_len &&
82 memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 &&
83 (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) &&
84 (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) &&
85 (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) &&
86 (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) &&
87 (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
90 sband = ieee80211_get_sband(sdata);
94 ieee80211_sta_get_rates(sdata, ie, sband->band,
97 if (sdata->vif.bss_conf.basic_rates != basic_rates)
100 cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
102 ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
104 if (ie->vht_cap_elem)
105 vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info);
107 ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
108 ie->vht_operation, ie->ht_operation,
110 ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, ie->eht_operation,
113 if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
121 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
123 * @ie: information elements of a management frame from the mesh peer
125 * Returns: %true if the mesh peer is willing to establish peer links
127 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie)
129 return (ie->mesh_config->meshconf_cap &
130 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0;
134 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
136 * @sdata: mesh interface in which mesh beacons are going to be updated
138 * Returns: beacon changed flag if the beacon content changed.
140 u64 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata)
145 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
146 * the mesh interface might be able to establish plinks with peers that
147 * are already on the table but are not on PLINK_ESTAB state. However,
148 * in general the mesh interface is not accepting peer link requests
149 * from new peers, and that must be reflected in the beacon
151 free_plinks = mesh_plink_availables(sdata);
153 if (free_plinks != sdata->u.mesh.accepting_plinks) {
154 sdata->u.mesh.accepting_plinks = free_plinks;
155 changed = BSS_CHANGED_BEACON;
162 * mesh_sta_cleanup - clean up any mesh sta state
164 * @sta: mesh sta to clean up.
166 void mesh_sta_cleanup(struct sta_info *sta)
168 struct ieee80211_sub_if_data *sdata = sta->sdata;
169 u64 changed = mesh_plink_deactivate(sta);
172 ieee80211_mbss_info_change_notify(sdata, changed);
175 int mesh_rmc_init(struct ieee80211_sub_if_data *sdata)
179 sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL);
180 if (!sdata->u.mesh.rmc)
182 sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1;
183 for (i = 0; i < RMC_BUCKETS; i++)
184 INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]);
188 void mesh_rmc_free(struct ieee80211_sub_if_data *sdata)
190 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
192 struct hlist_node *n;
195 if (!sdata->u.mesh.rmc)
198 for (i = 0; i < RMC_BUCKETS; i++) {
199 hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) {
201 kmem_cache_free(rm_cache, p);
206 sdata->u.mesh.rmc = NULL;
210 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
213 * @sa: source address
214 * @mesh_hdr: mesh_header
216 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
218 * Checks using the source address and the mesh sequence number if we have
219 * received this frame lately. If the frame is not in the cache, it is added to
222 int mesh_rmc_check(struct ieee80211_sub_if_data *sdata,
223 const u8 *sa, struct ieee80211s_hdr *mesh_hdr)
225 struct mesh_rmc *rmc = sdata->u.mesh.rmc;
230 struct hlist_node *n;
235 /* Don't care about endianness since only match matters */
236 memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));
237 idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;
238 hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) {
240 if (time_after(jiffies, p->exp_time) ||
241 entries == RMC_QUEUE_MAX_LEN) {
243 kmem_cache_free(rm_cache, p);
245 } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa))
249 p = kmem_cache_alloc(rm_cache, GFP_ATOMIC);
254 p->exp_time = jiffies + RMC_TIMEOUT;
255 memcpy(p->sa, sa, ETH_ALEN);
256 hlist_add_head(&p->list, &rmc->bucket[idx]);
260 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata,
263 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
265 u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie);
266 bool is_connected_to_gate = ifmsh->num_gates > 0 ||
267 ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol ||
268 ifmsh->mshcfg.dot11MeshConnectedToMeshGate;
269 bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer;
271 if (skb_tailroom(skb) < 2 + meshconf_len)
274 pos = skb_put(skb, 2 + meshconf_len);
275 *pos++ = WLAN_EID_MESH_CONFIG;
276 *pos++ = meshconf_len;
278 /* save a pointer for quick updates in pre-tbtt */
279 ifmsh->meshconf_offset = pos - skb->data;
281 /* Active path selection protocol ID */
282 *pos++ = ifmsh->mesh_pp_id;
283 /* Active path selection metric ID */
284 *pos++ = ifmsh->mesh_pm_id;
285 /* Congestion control mode identifier */
286 *pos++ = ifmsh->mesh_cc_id;
287 /* Synchronization protocol identifier */
288 *pos++ = ifmsh->mesh_sp_id;
289 /* Authentication Protocol identifier */
290 *pos++ = ifmsh->mesh_auth_id;
291 /* Mesh Formation Info - number of neighbors */
292 neighbors = atomic_read(&ifmsh->estab_plinks);
293 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
294 *pos++ = (is_connected_to_as << 7) |
296 is_connected_to_gate;
297 /* Mesh capability */
299 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
300 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
301 *pos |= ifmsh->accepting_plinks ?
302 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
303 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
304 *pos |= ifmsh->ps_peers_deep_sleep ?
305 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
309 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
311 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
314 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
317 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
318 *pos++ = WLAN_EID_MESH_ID;
319 *pos++ = ifmsh->mesh_id_len;
320 if (ifmsh->mesh_id_len)
321 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
326 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
329 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
332 /* see IEEE802.11-2012 13.14.6 */
333 if (ifmsh->ps_peers_light_sleep == 0 &&
334 ifmsh->ps_peers_deep_sleep == 0 &&
335 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
338 if (skb_tailroom(skb) < 4)
341 pos = skb_put(skb, 2 + 2);
342 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
344 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
349 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
352 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
356 if (!ifmsh->ie || !ifmsh->ie_len)
359 /* fast-forward to vendor IEs */
360 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
362 if (offset < ifmsh->ie_len) {
363 len = ifmsh->ie_len - offset;
364 data = ifmsh->ie + offset;
365 if (skb_tailroom(skb) < len)
367 skb_put_data(skb, data, len);
373 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
375 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
379 if (!ifmsh->ie || !ifmsh->ie_len)
383 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
389 if (skb_tailroom(skb) < len)
391 skb_put_data(skb, data, len);
396 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
399 struct ieee80211_chanctx_conf *chanctx_conf;
400 struct ieee80211_channel *chan;
403 if (skb_tailroom(skb) < 3)
407 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
408 if (WARN_ON(!chanctx_conf)) {
412 chan = chanctx_conf->def.chan;
415 pos = skb_put(skb, 2 + 1);
416 *pos++ = WLAN_EID_DS_PARAMS;
418 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
423 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
426 struct ieee80211_supported_band *sband;
429 sband = ieee80211_get_sband(sdata);
433 /* HT not allowed in 6 GHz */
434 if (sband->band == NL80211_BAND_6GHZ)
437 if (!sband->ht_cap.ht_supported ||
438 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
439 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
440 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
443 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
446 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
447 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
452 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
455 struct ieee80211_local *local = sdata->local;
456 struct ieee80211_chanctx_conf *chanctx_conf;
457 struct ieee80211_channel *channel;
458 struct ieee80211_supported_band *sband;
459 struct ieee80211_sta_ht_cap *ht_cap;
463 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
464 if (WARN_ON(!chanctx_conf)) {
468 channel = chanctx_conf->def.chan;
471 sband = local->hw.wiphy->bands[channel->band];
472 ht_cap = &sband->ht_cap;
474 /* HT not allowed in 6 GHz */
475 if (sband->band == NL80211_BAND_6GHZ)
478 if (!ht_cap->ht_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_ht_operation))
487 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
488 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
489 sdata->vif.bss_conf.ht_operation_mode,
495 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
498 struct ieee80211_supported_band *sband;
501 sband = ieee80211_get_sband(sdata);
505 /* VHT not allowed in 6 GHz */
506 if (sband->band == NL80211_BAND_6GHZ)
509 if (!sband->vht_cap.vht_supported ||
510 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
511 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
512 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
515 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
518 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
519 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
524 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
527 struct ieee80211_local *local = sdata->local;
528 struct ieee80211_chanctx_conf *chanctx_conf;
529 struct ieee80211_channel *channel;
530 struct ieee80211_supported_band *sband;
531 struct ieee80211_sta_vht_cap *vht_cap;
535 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
536 if (WARN_ON(!chanctx_conf)) {
540 channel = chanctx_conf->def.chan;
543 sband = local->hw.wiphy->bands[channel->band];
544 vht_cap = &sband->vht_cap;
546 /* VHT not allowed in 6 GHz */
547 if (sband->band == NL80211_BAND_6GHZ)
550 if (!vht_cap->vht_supported ||
551 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
552 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
553 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
556 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
559 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
560 ieee80211_ie_build_vht_oper(pos, vht_cap,
561 &sdata->vif.bss_conf.chandef);
566 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
567 struct sk_buff *skb, u8 ie_len)
569 const struct ieee80211_sta_he_cap *he_cap;
570 struct ieee80211_supported_band *sband;
573 sband = ieee80211_get_sband(sdata);
577 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
580 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
581 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
582 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
585 if (skb_tailroom(skb) < ie_len)
588 pos = skb_put(skb, ie_len);
589 ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len);
594 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
597 const struct ieee80211_sta_he_cap *he_cap;
598 struct ieee80211_supported_band *sband;
602 sband = ieee80211_get_sband(sdata);
606 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
608 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
609 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
610 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
613 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
614 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
615 len += sizeof(struct ieee80211_he_6ghz_oper);
617 if (skb_tailroom(skb) < len)
620 pos = skb_put(skb, len);
621 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef);
626 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
629 struct ieee80211_supported_band *sband;
630 const struct ieee80211_sband_iftype_data *iftd;
632 sband = ieee80211_get_sband(sdata);
636 iftd = ieee80211_get_sband_iftype_data(sband,
637 NL80211_IFTYPE_MESH_POINT);
638 /* The device doesn't support HE in mesh mode or at all */
642 ieee80211_ie_build_he_6ghz_cap(sdata, sdata->deflink.smps_mode, skb);
646 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data *sdata,
647 struct sk_buff *skb, u8 ie_len)
649 const struct ieee80211_sta_he_cap *he_cap;
650 const struct ieee80211_sta_eht_cap *eht_cap;
651 struct ieee80211_supported_band *sband;
654 sband = ieee80211_get_sband(sdata);
658 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
659 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
660 if (!he_cap || !eht_cap ||
661 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
662 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
663 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
666 if (skb_tailroom(skb) < ie_len)
669 pos = skb_put(skb, ie_len);
670 ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + ie_len, false);
675 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
677 const struct ieee80211_sta_eht_cap *eht_cap;
678 struct ieee80211_supported_band *sband;
682 sband = ieee80211_get_sband(sdata);
686 eht_cap = ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
688 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
689 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
690 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
693 len = 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
694 offsetof(struct ieee80211_eht_operation_info, optional);
696 if (skb_tailroom(skb) < len)
699 pos = skb_put(skb, len);
700 ieee80211_ie_build_eht_oper(pos, &sdata->vif.bss_conf.chandef, eht_cap);
705 static void ieee80211_mesh_path_timer(struct timer_list *t)
707 struct ieee80211_sub_if_data *sdata =
708 from_timer(sdata, t, u.mesh.mesh_path_timer);
710 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
713 static void ieee80211_mesh_path_root_timer(struct timer_list *t)
715 struct ieee80211_sub_if_data *sdata =
716 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
717 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
719 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
721 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
724 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
726 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
727 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
729 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
730 /* stop running timer */
731 del_timer_sync(&ifmsh->mesh_path_root_timer);
736 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata,
739 struct ieee80211_supported_band *sband;
740 const struct element *cap;
741 const struct ieee80211_he_operation *he_oper = NULL;
743 sband = ieee80211_get_sband(sdata);
747 if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) ||
748 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
749 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
750 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
753 sdata->vif.bss_conf.he_support = true;
755 cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len);
756 if (cap && cap->datalen >= 1 + sizeof(*he_oper) &&
757 cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1))
758 he_oper = (void *)(cap->data + 1);
761 sdata->vif.bss_conf.he_oper.params =
762 __le32_to_cpu(he_oper->he_oper_params);
764 sdata->vif.bss_conf.eht_support =
765 !!ieee80211_get_eht_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
768 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data *sdata,
769 struct sk_buff *skb, u32 ctrl_flags)
771 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
772 struct ieee80211_mesh_fast_tx *entry;
773 struct ieee80211s_hdr *meshhdr;
774 u8 sa[ETH_ALEN] __aligned(2);
775 struct tid_ampdu_tx *tid_tx;
776 struct sta_info *sta;
777 bool copy_sa = false;
781 if (ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP)
784 if (ifmsh->mshcfg.dot11MeshNolearn)
787 /* Add support for these cases later */
788 if (ifmsh->ps_peers_light_sleep || ifmsh->ps_peers_deep_sleep)
791 if (is_multicast_ether_addr(skb->data))
794 ethertype = (skb->data[12] << 8) | skb->data[13];
795 if (ethertype < ETH_P_802_3_MIN)
798 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
801 if (skb->ip_summed == CHECKSUM_PARTIAL) {
802 skb_set_transport_header(skb, skb_checksum_start_offset(skb));
803 if (skb_checksum_help(skb))
807 entry = mesh_fast_tx_get(sdata, skb->data);
811 if (skb_headroom(skb) < entry->hdrlen + entry->fast_tx.hdr_len)
814 sta = rcu_dereference(entry->mpath->next_hop);
818 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
819 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
821 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
824 tid_tx->last_tx = jiffies;
827 skb = skb_share_check(skb, GFP_ATOMIC);
831 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb));
833 meshhdr = (struct ieee80211s_hdr *)entry->hdr;
834 if ((meshhdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6) {
835 /* preserve SA from eth header for 6-addr frames */
836 ether_addr_copy(sa, skb->data + ETH_ALEN);
840 memcpy(skb_push(skb, entry->hdrlen - 2 * ETH_ALEN), entry->hdr,
843 meshhdr = (struct ieee80211s_hdr *)skb->data;
844 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
846 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
848 ether_addr_copy(meshhdr->eaddr2, sa);
850 skb_push(skb, 2 * ETH_ALEN);
851 __ieee80211_xmit_fast(sdata, sta, &entry->fast_tx, skb, tid_tx,
852 entry->mpath->dst, sdata->vif.addr);
858 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
859 * @hdr: 802.11 frame header
860 * @fc: frame control field
861 * @meshda: destination address in the mesh
862 * @meshsa: source address in the mesh. Same as TA, as frame is
863 * locally originated.
865 * Returns: the length of the 802.11 frame header (excludes mesh control header)
867 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
868 const u8 *meshda, const u8 *meshsa)
870 if (is_multicast_ether_addr(meshda)) {
871 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
873 memcpy(hdr->addr1, meshda, ETH_ALEN);
874 memcpy(hdr->addr2, meshsa, ETH_ALEN);
875 memcpy(hdr->addr3, meshsa, ETH_ALEN);
878 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
880 eth_zero_addr(hdr->addr1); /* RA is resolved later */
881 memcpy(hdr->addr2, meshsa, ETH_ALEN);
882 memcpy(hdr->addr3, meshda, ETH_ALEN);
883 memcpy(hdr->addr4, meshsa, ETH_ALEN);
889 * ieee80211_new_mesh_header - create a new mesh header
890 * @sdata: mesh interface to be used
891 * @meshhdr: uninitialized mesh header
892 * @addr4or5: 1st address in the ae header, which may correspond to address 4
893 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
895 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
898 * Returns: the header length
900 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
901 struct ieee80211s_hdr *meshhdr,
902 const char *addr4or5, const char *addr6)
904 if (WARN_ON(!addr4or5 && addr6))
907 memset(meshhdr, 0, sizeof(*meshhdr));
909 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
911 put_unaligned_le32(atomic_inc_return(&sdata->u.mesh.mesh_seqnum),
913 if (addr4or5 && !addr6) {
914 meshhdr->flags |= MESH_FLAGS_AE_A4;
915 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
917 } else if (addr4or5 && addr6) {
918 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
919 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
920 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
927 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
929 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
932 if (ifmsh->mshcfg.plink_timeout > 0)
933 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
934 mesh_path_expire(sdata);
936 changed = mesh_accept_plinks_update(sdata);
937 ieee80211_mbss_info_change_notify(sdata, changed);
939 mesh_fast_tx_gc(sdata);
941 mod_timer(&ifmsh->housekeeping_timer,
942 round_jiffies(jiffies +
943 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
946 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
948 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
951 mesh_path_tx_root_frame(sdata);
953 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
954 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
956 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
958 mod_timer(&ifmsh->mesh_path_root_timer,
959 round_jiffies(TU_TO_EXP_TIME(interval)));
963 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
965 struct beacon_data *bcn;
966 int head_len, tail_len;
968 struct ieee80211_mgmt *mgmt;
969 struct ieee80211_chanctx_conf *chanctx_conf;
970 struct mesh_csa_settings *csa;
971 enum nl80211_band band;
972 u8 ie_len_he_cap, ie_len_eht_cap;
974 struct ieee80211_sub_if_data *sdata;
975 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
977 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
979 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
980 band = chanctx_conf->def.chan->band;
983 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
984 NL80211_IFTYPE_MESH_POINT);
985 ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata,
986 NL80211_IFTYPE_MESH_POINT);
989 /* Channel Switch Announcement */
990 2 + sizeof(struct ieee80211_channel_sw_ie) +
991 /* Mesh Channel Switch Parameters */
992 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
993 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
994 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
995 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
996 2 + 8 + /* supported rates */
997 2 + 3; /* DS params */
998 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
999 2 + sizeof(struct ieee80211_ht_cap) +
1000 2 + sizeof(struct ieee80211_ht_operation) +
1001 2 + ifmsh->mesh_id_len +
1002 2 + sizeof(struct ieee80211_meshconf_ie) +
1003 2 + sizeof(__le16) + /* awake window */
1004 2 + sizeof(struct ieee80211_vht_cap) +
1005 2 + sizeof(struct ieee80211_vht_operation) +
1007 2 + 1 + sizeof(struct ieee80211_he_operation) +
1008 sizeof(struct ieee80211_he_6ghz_oper) +
1009 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
1011 2 + 1 + offsetof(struct ieee80211_eht_operation, optional) +
1012 offsetof(struct ieee80211_eht_operation_info, optional) +
1015 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
1016 /* need an skb for IE builders to operate on */
1017 skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL);
1023 * pointers go into the block we allocated,
1024 * memory is | beacon_data | head | tail |
1026 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
1028 /* fill in the head */
1029 mgmt = skb_put_zero(skb, hdr_len);
1030 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1031 IEEE80211_STYPE_BEACON);
1032 eth_broadcast_addr(mgmt->da);
1033 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1034 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
1035 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
1036 mgmt->u.beacon.beacon_int =
1037 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
1038 mgmt->u.beacon.capab_info |= cpu_to_le16(
1039 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
1041 pos = skb_put(skb, 2);
1042 *pos++ = WLAN_EID_SSID;
1046 csa = rcu_dereference(ifmsh->csa);
1048 enum nl80211_channel_type ct;
1049 struct cfg80211_chan_def *chandef;
1050 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
1051 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
1053 pos = skb_put_zero(skb, ie_len);
1054 *pos++ = WLAN_EID_CHANNEL_SWITCH;
1057 *pos++ = ieee80211_frequency_to_channel(
1058 csa->settings.chandef.chan->center_freq);
1059 bcn->cntdwn_current_counter = csa->settings.count;
1060 bcn->cntdwn_counter_offsets[0] = hdr_len + 6;
1061 *pos++ = csa->settings.count;
1062 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
1064 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
1065 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
1066 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1068 *pos++ = ifmsh->chsw_ttl;
1070 *pos++ |= csa->settings.block_tx ?
1071 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
1072 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
1074 put_unaligned_le16(ifmsh->pre_value, pos);
1077 switch (csa->settings.chandef.width) {
1078 case NL80211_CHAN_WIDTH_40:
1079 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
1080 pos = skb_put_zero(skb, ie_len);
1082 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
1083 *pos++ = 1; /* len */
1084 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
1085 if (ct == NL80211_CHAN_HT40PLUS)
1086 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1088 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1090 case NL80211_CHAN_WIDTH_80:
1091 case NL80211_CHAN_WIDTH_80P80:
1092 case NL80211_CHAN_WIDTH_160:
1093 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
1095 sizeof(struct ieee80211_wide_bw_chansw_ie);
1096 pos = skb_put_zero(skb, ie_len);
1098 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
1099 *pos++ = 5; /* len */
1101 chandef = &csa->settings.chandef;
1102 ieee80211_ie_build_wide_bw_cs(pos, chandef);
1110 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
1111 mesh_add_ds_params_ie(sdata, skb))
1114 bcn->head_len = skb->len;
1115 memcpy(bcn->head, skb->data, bcn->head_len);
1119 bcn->tail = bcn->head + bcn->head_len;
1121 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
1122 mesh_add_rsn_ie(sdata, skb) ||
1123 mesh_add_ht_cap_ie(sdata, skb) ||
1124 mesh_add_ht_oper_ie(sdata, skb) ||
1125 mesh_add_meshid_ie(sdata, skb) ||
1126 mesh_add_meshconf_ie(sdata, skb) ||
1127 mesh_add_awake_window_ie(sdata, skb) ||
1128 mesh_add_vht_cap_ie(sdata, skb) ||
1129 mesh_add_vht_oper_ie(sdata, skb) ||
1130 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
1131 mesh_add_he_oper_ie(sdata, skb) ||
1132 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
1133 mesh_add_eht_cap_ie(sdata, skb, ie_len_eht_cap) ||
1134 mesh_add_eht_oper_ie(sdata, skb) ||
1135 mesh_add_vendor_ies(sdata, skb))
1138 bcn->tail_len = skb->len;
1139 memcpy(bcn->tail, skb->data, bcn->tail_len);
1140 ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len);
1141 bcn->meshconf = (struct ieee80211_meshconf_ie *)
1142 (bcn->tail + ifmsh->meshconf_offset);
1145 rcu_assign_pointer(ifmsh->beacon, bcn);
1154 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
1156 struct beacon_data *old_bcn;
1159 old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata);
1160 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
1162 /* just reuse old beacon */
1166 kfree_rcu(old_bcn, rcu_head);
1170 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1174 unsigned long bits = changed;
1180 /* if we race with running work, worst case this work becomes a noop */
1181 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
1182 set_bit(bit, ifmsh->mbss_changed);
1183 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
1184 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
1187 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
1189 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1190 struct ieee80211_local *local = sdata->local;
1191 u64 changed = BSS_CHANGED_BEACON |
1192 BSS_CHANGED_BEACON_ENABLED |
1194 BSS_CHANGED_BASIC_RATES |
1195 BSS_CHANGED_BEACON_INT |
1196 BSS_CHANGED_MCAST_RATE;
1198 local->fif_other_bss++;
1199 /* mesh ifaces must set allmulti to forward mcast traffic */
1200 atomic_inc(&local->iff_allmultis);
1201 ieee80211_configure_filter(local);
1203 ifmsh->mesh_cc_id = 0; /* Disabled */
1204 /* register sync ops from extensible synchronization framework */
1205 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
1206 ifmsh->sync_offset_clockdrift_max = 0;
1207 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
1208 ieee80211_mesh_root_setup(ifmsh);
1209 wiphy_work_queue(local->hw.wiphy, &sdata->work);
1210 sdata->vif.bss_conf.ht_operation_mode =
1211 ifmsh->mshcfg.ht_opmode;
1212 sdata->vif.bss_conf.enable_beacon = true;
1214 changed |= ieee80211_mps_local_status_update(sdata);
1216 if (ieee80211_mesh_build_beacon(ifmsh)) {
1217 ieee80211_stop_mesh(sdata);
1221 ieee80211_recalc_dtim(local, sdata);
1222 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
1224 netif_carrier_on(sdata->dev);
1228 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1230 struct ieee80211_local *local = sdata->local;
1231 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1232 struct beacon_data *bcn;
1234 netif_carrier_off(sdata->dev);
1236 /* flush STAs and mpaths on this iface */
1237 sta_info_flush(sdata);
1238 ieee80211_free_keys(sdata, true);
1239 mesh_path_flush_by_iface(sdata);
1241 /* stop the beacon */
1242 ifmsh->mesh_id_len = 0;
1243 sdata->vif.bss_conf.enable_beacon = false;
1244 sdata->beacon_rate_set = false;
1245 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
1246 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1247 BSS_CHANGED_BEACON_ENABLED);
1250 bcn = sdata_dereference(ifmsh->beacon, sdata);
1251 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1252 kfree_rcu(bcn, rcu_head);
1254 /* free all potentially still buffered group-addressed frames */
1255 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1256 skb_queue_purge(&ifmsh->ps.bc_buf);
1258 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
1259 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
1260 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
1262 /* clear any mesh work (for next join) we may have accrued */
1263 ifmsh->wrkq_flags = 0;
1264 memset(ifmsh->mbss_changed, 0, sizeof(ifmsh->mbss_changed));
1266 local->fif_other_bss--;
1267 atomic_dec(&local->iff_allmultis);
1268 ieee80211_configure_filter(local);
1271 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1275 /* if the current channel is a DFS channel, mark the channel as
1278 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1279 &sdata->vif.bss_conf.chandef,
1280 NL80211_IFTYPE_MESH_POINT);
1282 cfg80211_radar_event(sdata->local->hw.wiphy,
1283 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
1287 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1288 struct ieee802_11_elems *elems, bool beacon)
1290 struct cfg80211_csa_settings params;
1291 struct ieee80211_csa_ie csa_ie;
1292 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1293 struct ieee80211_supported_band *sband;
1295 ieee80211_conn_flags_t conn_flags = 0;
1296 u32 vht_cap_info = 0;
1298 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1300 sband = ieee80211_get_sband(sdata);
1304 switch (sdata->vif.bss_conf.chandef.width) {
1305 case NL80211_CHAN_WIDTH_20_NOHT:
1306 conn_flags |= IEEE80211_CONN_DISABLE_HT;
1308 case NL80211_CHAN_WIDTH_20:
1309 conn_flags |= IEEE80211_CONN_DISABLE_40MHZ;
1311 case NL80211_CHAN_WIDTH_40:
1312 conn_flags |= IEEE80211_CONN_DISABLE_VHT;
1318 if (elems->vht_cap_elem)
1320 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1322 memset(¶ms, 0, sizeof(params));
1323 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1325 conn_flags, sdata->vif.addr,
1332 /* Mark the channel unavailable if the reason for the switch is
1335 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1336 ieee80211_mesh_csa_mark_radar(sdata);
1338 params.chandef = csa_ie.chandef;
1339 params.count = csa_ie.count;
1341 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1342 IEEE80211_CHAN_DISABLED) ||
1343 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1344 NL80211_IFTYPE_MESH_POINT)) {
1346 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1348 params.chandef.chan->center_freq,
1349 params.chandef.width,
1350 params.chandef.center_freq1,
1351 params.chandef.center_freq2);
1355 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1357 NL80211_IFTYPE_MESH_POINT);
1360 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1362 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1364 params.chandef.chan->center_freq,
1365 params.chandef.width,
1366 params.chandef.center_freq1,
1367 params.chandef.center_freq2);
1371 params.radar_required = err;
1373 if (cfg80211_chandef_identical(¶ms.chandef,
1374 &sdata->vif.bss_conf.chandef)) {
1376 "received csa with an identical chandef, ignoring\n");
1381 "received channel switch announcement to go to channel %d MHz\n",
1382 params.chandef.chan->center_freq);
1384 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1386 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1387 if (ifmsh->pre_value >= csa_ie.pre_value)
1389 ifmsh->pre_value = csa_ie.pre_value;
1392 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1395 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1397 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1405 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1406 struct ieee80211_mgmt *mgmt, size_t len)
1408 struct ieee80211_local *local = sdata->local;
1409 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1410 struct sk_buff *presp;
1411 struct beacon_data *bcn;
1412 struct ieee80211_mgmt *hdr;
1413 struct ieee802_11_elems *elems;
1417 pos = mgmt->u.probe_req.variable;
1418 baselen = (u8 *) pos - (u8 *) mgmt;
1422 elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL);
1426 if (!elems->mesh_id)
1429 /* 802.11-2012 10.1.4.3.2 */
1430 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1431 !is_broadcast_ether_addr(mgmt->da)) ||
1432 elems->ssid_len != 0)
1435 if (elems->mesh_id_len != 0 &&
1436 (elems->mesh_id_len != ifmsh->mesh_id_len ||
1437 memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1441 bcn = rcu_dereference(ifmsh->beacon);
1446 presp = dev_alloc_skb(local->tx_headroom +
1447 bcn->head_len + bcn->tail_len);
1451 skb_reserve(presp, local->tx_headroom);
1452 skb_put_data(presp, bcn->head, bcn->head_len);
1453 skb_put_data(presp, bcn->tail, bcn->tail_len);
1454 hdr = (struct ieee80211_mgmt *) presp->data;
1455 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1456 IEEE80211_STYPE_PROBE_RESP);
1457 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1458 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1459 ieee80211_tx_skb(sdata, presp);
1466 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1468 struct ieee80211_mgmt *mgmt,
1470 struct ieee80211_rx_status *rx_status)
1472 struct ieee80211_local *local = sdata->local;
1473 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1474 struct ieee802_11_elems *elems;
1475 struct ieee80211_channel *channel;
1478 enum nl80211_band band = rx_status->band;
1480 /* ignore ProbeResp to foreign address */
1481 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1482 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1485 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1489 elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable,
1495 /* ignore non-mesh or secure / unsecure mismatch */
1496 if ((!elems->mesh_id || !elems->mesh_config) ||
1497 (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1498 (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1501 if (elems->ds_params)
1502 freq = ieee80211_channel_to_frequency(elems->ds_params[0], band);
1504 freq = rx_status->freq;
1506 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1508 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1511 if (mesh_matches_local(sdata, elems)) {
1512 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1513 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1514 if (!sdata->u.mesh.user_mpm ||
1515 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1516 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1517 mesh_neighbour_update(sdata, mgmt->sa, elems,
1520 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1521 !sdata->vif.bss_conf.csa_active)
1522 ieee80211_mesh_process_chnswitch(sdata, elems, true);
1525 if (ifmsh->sync_ops)
1526 ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len,
1527 elems->mesh_config, rx_status);
1532 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata, u64 *changed)
1534 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1535 struct mesh_csa_settings *tmp_csa_settings;
1538 /* Reset the TTL value and Initiator flag */
1539 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1540 ifmsh->chsw_ttl = 0;
1542 /* Remove the CSA and MCSP elements from the beacon */
1543 tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata);
1544 RCU_INIT_POINTER(ifmsh->csa, NULL);
1545 if (tmp_csa_settings)
1546 kfree_rcu(tmp_csa_settings, rcu_head);
1547 ret = ieee80211_mesh_rebuild_beacon(sdata);
1551 *changed |= BSS_CHANGED_BEACON;
1553 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1554 sdata->vif.bss_conf.chandef.chan->center_freq);
1558 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1559 struct cfg80211_csa_settings *csa_settings,
1562 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1563 struct mesh_csa_settings *tmp_csa_settings;
1566 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1568 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1570 if (!tmp_csa_settings)
1573 memcpy(&tmp_csa_settings->settings, csa_settings,
1574 sizeof(struct cfg80211_csa_settings));
1576 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1578 ret = ieee80211_mesh_rebuild_beacon(sdata);
1580 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1581 RCU_INIT_POINTER(ifmsh->csa, NULL);
1582 kfree_rcu(tmp_csa_settings, rcu_head);
1586 *changed |= BSS_CHANGED_BEACON;
1590 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1591 struct ieee80211_mgmt *mgmt, size_t len,
1592 struct ieee802_11_elems *elems)
1594 struct ieee80211_mgmt *mgmt_fwd;
1595 struct sk_buff *skb;
1596 struct ieee80211_local *local = sdata->local;
1598 skb = dev_alloc_skb(local->tx_headroom + len);
1601 skb_reserve(skb, local->tx_headroom);
1602 mgmt_fwd = skb_put(skb, len);
1604 elems->mesh_chansw_params_ie->mesh_ttl--;
1605 elems->mesh_chansw_params_ie->mesh_flags &=
1606 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1608 memcpy(mgmt_fwd, mgmt, len);
1609 eth_broadcast_addr(mgmt_fwd->da);
1610 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1611 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1613 ieee80211_tx_skb(sdata, skb);
1617 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1618 struct ieee80211_mgmt *mgmt, size_t len)
1620 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1621 struct ieee802_11_elems *elems;
1623 bool fwd_csa = true;
1627 if (mgmt->u.action.u.measurement.action_code !=
1628 WLAN_ACTION_SPCT_CHL_SWITCH)
1631 pos = mgmt->u.action.u.chan_switch.variable;
1632 baselen = offsetof(struct ieee80211_mgmt,
1633 u.action.u.chan_switch.variable);
1634 elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL);
1638 if (!mesh_matches_local(sdata, elems))
1641 ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
1642 if (!--ifmsh->chsw_ttl)
1645 pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
1646 if (ifmsh->pre_value >= pre_value)
1649 ifmsh->pre_value = pre_value;
1651 if (!sdata->vif.bss_conf.csa_active &&
1652 !ieee80211_mesh_process_chnswitch(sdata, elems, false)) {
1653 mcsa_dbg(sdata, "Failed to process CSA action frame");
1657 /* forward or re-broadcast the CSA frame */
1659 if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0)
1660 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1666 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1667 struct ieee80211_mgmt *mgmt,
1669 struct ieee80211_rx_status *rx_status)
1671 switch (mgmt->u.action.category) {
1672 case WLAN_CATEGORY_SELF_PROTECTED:
1673 switch (mgmt->u.action.u.self_prot.action_code) {
1674 case WLAN_SP_MESH_PEERING_OPEN:
1675 case WLAN_SP_MESH_PEERING_CLOSE:
1676 case WLAN_SP_MESH_PEERING_CONFIRM:
1677 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1681 case WLAN_CATEGORY_MESH_ACTION:
1682 if (mesh_action_is_path_sel(mgmt))
1683 mesh_rx_path_sel_frame(sdata, mgmt, len);
1685 case WLAN_CATEGORY_SPECTRUM_MGMT:
1686 mesh_rx_csa_frame(sdata, mgmt, len);
1691 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1692 struct sk_buff *skb)
1694 struct ieee80211_rx_status *rx_status;
1695 struct ieee80211_mgmt *mgmt;
1698 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1700 /* mesh already went down */
1701 if (!sdata->u.mesh.mesh_id_len)
1704 rx_status = IEEE80211_SKB_RXCB(skb);
1705 mgmt = (struct ieee80211_mgmt *) skb->data;
1706 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1709 case IEEE80211_STYPE_PROBE_RESP:
1710 case IEEE80211_STYPE_BEACON:
1711 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1714 case IEEE80211_STYPE_PROBE_REQ:
1715 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1717 case IEEE80211_STYPE_ACTION:
1718 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1723 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1725 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1729 for_each_set_bit(bit, ifmsh->mbss_changed,
1730 sizeof(changed) * BITS_PER_BYTE) {
1731 clear_bit(bit, ifmsh->mbss_changed);
1732 changed |= BIT(bit);
1735 if (sdata->vif.bss_conf.enable_beacon &&
1736 (changed & (BSS_CHANGED_BEACON |
1738 BSS_CHANGED_BASIC_RATES |
1739 BSS_CHANGED_BEACON_INT)))
1740 if (ieee80211_mesh_rebuild_beacon(sdata))
1743 ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed);
1746 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1748 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1750 lockdep_assert_wiphy(sdata->local->hw.wiphy);
1752 /* mesh already went down */
1753 if (!sdata->u.mesh.mesh_id_len)
1756 if (ifmsh->preq_queue_len &&
1758 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1759 mesh_path_start_discovery(sdata);
1761 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1762 ieee80211_mesh_housekeeping(sdata);
1764 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1765 ieee80211_mesh_rootpath(sdata);
1767 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1768 mesh_sync_adjust_tsf(sdata);
1770 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1771 mesh_bss_info_changed(sdata);
1775 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1777 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1778 static u8 zero_addr[ETH_ALEN] = {};
1780 timer_setup(&ifmsh->housekeeping_timer,
1781 ieee80211_mesh_housekeeping_timer, 0);
1783 ifmsh->accepting_plinks = true;
1784 atomic_set(&ifmsh->mpaths, 0);
1785 mesh_rmc_init(sdata);
1786 ifmsh->last_preq = jiffies;
1787 ifmsh->next_perr = jiffies;
1788 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1789 /* Allocate all mesh structures when creating the first mesh interface. */
1790 if (!mesh_allocated)
1793 mesh_pathtbl_init(sdata);
1795 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1796 timer_setup(&ifmsh->mesh_path_root_timer,
1797 ieee80211_mesh_path_root_timer, 0);
1798 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1799 skb_queue_head_init(&ifmsh->ps.bc_buf);
1800 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1801 spin_lock_init(&ifmsh->sync_offset_lock);
1802 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1804 sdata->vif.bss_conf.bssid = zero_addr;
1807 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1809 mesh_rmc_free(sdata);
1810 mesh_pathtbl_unregister(sdata);