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;
264 if (skb_tailroom(skb) < 2 + meshconf_len)
267 pos = skb_put(skb, 2 + meshconf_len);
268 *pos++ = WLAN_EID_MESH_CONFIG;
269 *pos++ = meshconf_len;
271 /* save a pointer for quick updates in pre-tbtt */
272 ifmsh->meshconf_offset = pos - skb->data;
274 /* Active path selection protocol ID */
275 *pos++ = ifmsh->mesh_pp_id;
276 /* Active path selection metric ID */
277 *pos++ = ifmsh->mesh_pm_id;
278 /* Congestion control mode identifier */
279 *pos++ = ifmsh->mesh_cc_id;
280 /* Synchronization protocol identifier */
281 *pos++ = ifmsh->mesh_sp_id;
282 /* Authentication Protocol identifier */
283 *pos++ = ifmsh->mesh_auth_id;
284 /* Mesh Formation Info - number of neighbors */
285 neighbors = atomic_read(&ifmsh->estab_plinks);
286 neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS);
287 *pos++ = (neighbors << 1) | is_connected_to_gate;
288 /* Mesh capability */
290 *pos |= ifmsh->mshcfg.dot11MeshForwarding ?
291 IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00;
292 *pos |= ifmsh->accepting_plinks ?
293 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00;
294 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
295 *pos |= ifmsh->ps_peers_deep_sleep ?
296 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00;
300 int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
302 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
305 if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len)
308 pos = skb_put(skb, 2 + ifmsh->mesh_id_len);
309 *pos++ = WLAN_EID_MESH_ID;
310 *pos++ = ifmsh->mesh_id_len;
311 if (ifmsh->mesh_id_len)
312 memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len);
317 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata,
320 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
323 /* see IEEE802.11-2012 13.14.6 */
324 if (ifmsh->ps_peers_light_sleep == 0 &&
325 ifmsh->ps_peers_deep_sleep == 0 &&
326 ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE)
329 if (skb_tailroom(skb) < 4)
332 pos = skb_put(skb, 2 + 2);
333 *pos++ = WLAN_EID_MESH_AWAKE_WINDOW;
335 put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos);
340 int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata,
343 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
347 if (!ifmsh->ie || !ifmsh->ie_len)
350 /* fast-forward to vendor IEs */
351 offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0);
353 if (offset < ifmsh->ie_len) {
354 len = ifmsh->ie_len - offset;
355 data = ifmsh->ie + offset;
356 if (skb_tailroom(skb) < len)
358 skb_put_data(skb, data, len);
364 int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
366 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
370 if (!ifmsh->ie || !ifmsh->ie_len)
374 data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len);
380 if (skb_tailroom(skb) < len)
382 skb_put_data(skb, data, len);
387 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata,
390 struct ieee80211_chanctx_conf *chanctx_conf;
391 struct ieee80211_channel *chan;
394 if (skb_tailroom(skb) < 3)
398 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
399 if (WARN_ON(!chanctx_conf)) {
403 chan = chanctx_conf->def.chan;
406 pos = skb_put(skb, 2 + 1);
407 *pos++ = WLAN_EID_DS_PARAMS;
409 *pos++ = ieee80211_frequency_to_channel(chan->center_freq);
414 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
417 struct ieee80211_supported_band *sband;
420 sband = ieee80211_get_sband(sdata);
424 /* HT not allowed in 6 GHz */
425 if (sband->band == NL80211_BAND_6GHZ)
428 if (!sband->ht_cap.ht_supported ||
429 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
430 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
431 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
434 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
437 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
438 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap);
443 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
446 struct ieee80211_local *local = sdata->local;
447 struct ieee80211_chanctx_conf *chanctx_conf;
448 struct ieee80211_channel *channel;
449 struct ieee80211_supported_band *sband;
450 struct ieee80211_sta_ht_cap *ht_cap;
454 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
455 if (WARN_ON(!chanctx_conf)) {
459 channel = chanctx_conf->def.chan;
462 sband = local->hw.wiphy->bands[channel->band];
463 ht_cap = &sband->ht_cap;
465 /* HT not allowed in 6 GHz */
466 if (sband->band == NL80211_BAND_6GHZ)
469 if (!ht_cap->ht_supported ||
470 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
471 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
472 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
475 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation))
478 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
479 ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef,
480 sdata->vif.bss_conf.ht_operation_mode,
486 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
489 struct ieee80211_supported_band *sband;
492 sband = ieee80211_get_sband(sdata);
496 /* VHT not allowed in 6 GHz */
497 if (sband->band == NL80211_BAND_6GHZ)
500 if (!sband->vht_cap.vht_supported ||
501 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
502 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
503 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
506 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
509 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
510 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap);
515 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
518 struct ieee80211_local *local = sdata->local;
519 struct ieee80211_chanctx_conf *chanctx_conf;
520 struct ieee80211_channel *channel;
521 struct ieee80211_supported_band *sband;
522 struct ieee80211_sta_vht_cap *vht_cap;
526 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
527 if (WARN_ON(!chanctx_conf)) {
531 channel = chanctx_conf->def.chan;
534 sband = local->hw.wiphy->bands[channel->band];
535 vht_cap = &sband->vht_cap;
537 /* VHT not allowed in 6 GHz */
538 if (sband->band == NL80211_BAND_6GHZ)
541 if (!vht_cap->vht_supported ||
542 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
543 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
544 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
547 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation))
550 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
551 ieee80211_ie_build_vht_oper(pos, vht_cap,
552 &sdata->vif.bss_conf.chandef);
557 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
558 struct sk_buff *skb, u8 ie_len)
560 const struct ieee80211_sta_he_cap *he_cap;
561 struct ieee80211_supported_band *sband;
564 sband = ieee80211_get_sband(sdata);
568 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
571 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
572 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
573 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
576 if (skb_tailroom(skb) < ie_len)
579 pos = skb_put(skb, ie_len);
580 ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);
585 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
588 const struct ieee80211_sta_he_cap *he_cap;
589 struct ieee80211_supported_band *sband;
593 sband = ieee80211_get_sband(sdata);
597 he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT);
599 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
600 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
601 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10)
604 len = 2 + 1 + sizeof(struct ieee80211_he_operation);
605 if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
606 len += sizeof(struct ieee80211_he_6ghz_oper);
608 if (skb_tailroom(skb) < len)
611 pos = skb_put(skb, len);
612 ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef);
617 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
620 ieee80211_ie_build_he_6ghz_cap(sdata, skb);
624 static void ieee80211_mesh_path_timer(struct timer_list *t)
626 struct ieee80211_sub_if_data *sdata =
627 from_timer(sdata, t, u.mesh.mesh_path_timer);
629 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
632 static void ieee80211_mesh_path_root_timer(struct timer_list *t)
634 struct ieee80211_sub_if_data *sdata =
635 from_timer(sdata, t, u.mesh.mesh_path_root_timer);
636 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
638 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
640 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
643 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh)
645 if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT)
646 set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
648 clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags);
649 /* stop running timer */
650 del_timer_sync(&ifmsh->mesh_path_root_timer);
655 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
656 * @hdr: 802.11 frame header
657 * @fc: frame control field
658 * @meshda: destination address in the mesh
659 * @meshsa: source address address in the mesh. Same as TA, as frame is
660 * locally originated.
662 * Return the length of the 802.11 (does not include a mesh control header)
664 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc,
665 const u8 *meshda, const u8 *meshsa)
667 if (is_multicast_ether_addr(meshda)) {
668 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
670 memcpy(hdr->addr1, meshda, ETH_ALEN);
671 memcpy(hdr->addr2, meshsa, ETH_ALEN);
672 memcpy(hdr->addr3, meshsa, ETH_ALEN);
675 *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
677 eth_zero_addr(hdr->addr1); /* RA is resolved later */
678 memcpy(hdr->addr2, meshsa, ETH_ALEN);
679 memcpy(hdr->addr3, meshda, ETH_ALEN);
680 memcpy(hdr->addr4, meshsa, ETH_ALEN);
686 * ieee80211_new_mesh_header - create a new mesh header
687 * @sdata: mesh interface to be used
688 * @meshhdr: uninitialized mesh header
689 * @addr4or5: 1st address in the ae header, which may correspond to address 4
690 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
692 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
695 * Return the header length.
697 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata,
698 struct ieee80211s_hdr *meshhdr,
699 const char *addr4or5, const char *addr6)
701 if (WARN_ON(!addr4or5 && addr6))
704 memset(meshhdr, 0, sizeof(*meshhdr));
706 meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
708 /* FIXME: racy -- TX on multiple queues can be concurrent */
709 put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum);
710 sdata->u.mesh.mesh_seqnum++;
712 if (addr4or5 && !addr6) {
713 meshhdr->flags |= MESH_FLAGS_AE_A4;
714 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
716 } else if (addr4or5 && addr6) {
717 meshhdr->flags |= MESH_FLAGS_AE_A5_A6;
718 memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN);
719 memcpy(meshhdr->eaddr2, addr6, ETH_ALEN);
726 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata)
728 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
731 if (ifmsh->mshcfg.plink_timeout > 0)
732 ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ);
733 mesh_path_expire(sdata);
735 changed = mesh_accept_plinks_update(sdata);
736 ieee80211_mbss_info_change_notify(sdata, changed);
738 mod_timer(&ifmsh->housekeeping_timer,
739 round_jiffies(jiffies +
740 IEEE80211_MESH_HOUSEKEEPING_INTERVAL));
743 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata)
745 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
748 mesh_path_tx_root_frame(sdata);
750 if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN)
751 interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval;
753 interval = ifmsh->mshcfg.dot11MeshHWMProotInterval;
755 mod_timer(&ifmsh->mesh_path_root_timer,
756 round_jiffies(TU_TO_EXP_TIME(interval)));
760 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
762 struct beacon_data *bcn;
763 int head_len, tail_len;
765 struct ieee80211_mgmt *mgmt;
766 struct ieee80211_chanctx_conf *chanctx_conf;
767 struct mesh_csa_settings *csa;
768 enum nl80211_band band;
771 struct ieee80211_sub_if_data *sdata;
772 int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon);
774 sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh);
776 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
777 band = chanctx_conf->def.chan->band;
780 ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
781 NL80211_IFTYPE_MESH_POINT);
784 /* Channel Switch Announcement */
785 2 + sizeof(struct ieee80211_channel_sw_ie) +
786 /* Mesh Channel Switch Parameters */
787 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) +
788 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
789 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) +
790 2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
791 2 + 8 + /* supported rates */
792 2 + 3; /* DS params */
793 tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
794 2 + sizeof(struct ieee80211_ht_cap) +
795 2 + sizeof(struct ieee80211_ht_operation) +
796 2 + ifmsh->mesh_id_len +
797 2 + sizeof(struct ieee80211_meshconf_ie) +
798 2 + sizeof(__le16) + /* awake window */
799 2 + sizeof(struct ieee80211_vht_cap) +
800 2 + sizeof(struct ieee80211_vht_operation) +
802 2 + 1 + sizeof(struct ieee80211_he_operation) +
803 sizeof(struct ieee80211_he_6ghz_oper) +
804 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
807 bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
808 /* need an skb for IE builders to operate on */
809 skb = dev_alloc_skb(max(head_len, tail_len));
815 * pointers go into the block we allocated,
816 * memory is | beacon_data | head | tail |
818 bcn->head = ((u8 *) bcn) + sizeof(*bcn);
820 /* fill in the head */
821 mgmt = skb_put_zero(skb, hdr_len);
822 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
823 IEEE80211_STYPE_BEACON);
824 eth_broadcast_addr(mgmt->da);
825 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
826 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
827 ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt);
828 mgmt->u.beacon.beacon_int =
829 cpu_to_le16(sdata->vif.bss_conf.beacon_int);
830 mgmt->u.beacon.capab_info |= cpu_to_le16(
831 sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0);
833 pos = skb_put(skb, 2);
834 *pos++ = WLAN_EID_SSID;
838 csa = rcu_dereference(ifmsh->csa);
840 enum nl80211_channel_type ct;
841 struct cfg80211_chan_def *chandef;
842 int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +
843 2 + sizeof(struct ieee80211_mesh_chansw_params_ie);
845 pos = skb_put_zero(skb, ie_len);
846 *pos++ = WLAN_EID_CHANNEL_SWITCH;
849 *pos++ = ieee80211_frequency_to_channel(
850 csa->settings.chandef.chan->center_freq);
851 bcn->csa_current_counter = csa->settings.count;
852 bcn->csa_counter_offsets[0] = hdr_len + 6;
853 *pos++ = csa->settings.count;
854 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
856 if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
857 *pos++ = ifmsh->mshcfg.dot11MeshTTL;
858 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
860 *pos++ = ifmsh->chsw_ttl;
862 *pos++ |= csa->settings.block_tx ?
863 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
864 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos);
866 put_unaligned_le16(ifmsh->pre_value, pos);
869 switch (csa->settings.chandef.width) {
870 case NL80211_CHAN_WIDTH_40:
871 ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
872 pos = skb_put_zero(skb, ie_len);
874 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
875 *pos++ = 1; /* len */
876 ct = cfg80211_get_chandef_type(&csa->settings.chandef);
877 if (ct == NL80211_CHAN_HT40PLUS)
878 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
880 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
882 case NL80211_CHAN_WIDTH_80:
883 case NL80211_CHAN_WIDTH_80P80:
884 case NL80211_CHAN_WIDTH_160:
885 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
887 sizeof(struct ieee80211_wide_bw_chansw_ie);
888 pos = skb_put_zero(skb, ie_len);
890 *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */
891 *pos++ = 5; /* len */
893 chandef = &csa->settings.chandef;
894 ieee80211_ie_build_wide_bw_cs(pos, chandef);
902 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
903 mesh_add_ds_params_ie(sdata, skb))
906 bcn->head_len = skb->len;
907 memcpy(bcn->head, skb->data, bcn->head_len);
911 bcn->tail = bcn->head + bcn->head_len;
913 if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
914 mesh_add_rsn_ie(sdata, skb) ||
915 mesh_add_ht_cap_ie(sdata, skb) ||
916 mesh_add_ht_oper_ie(sdata, skb) ||
917 mesh_add_meshid_ie(sdata, skb) ||
918 mesh_add_meshconf_ie(sdata, skb) ||
919 mesh_add_awake_window_ie(sdata, skb) ||
920 mesh_add_vht_cap_ie(sdata, skb) ||
921 mesh_add_vht_oper_ie(sdata, skb) ||
922 mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
923 mesh_add_he_oper_ie(sdata, skb) ||
924 mesh_add_he_6ghz_cap_ie(sdata, skb) ||
925 mesh_add_vendor_ies(sdata, skb))
928 bcn->tail_len = skb->len;
929 memcpy(bcn->tail, skb->data, bcn->tail_len);
930 bcn->meshconf = (struct ieee80211_meshconf_ie *)
931 (bcn->tail + ifmsh->meshconf_offset);
934 rcu_assign_pointer(ifmsh->beacon, bcn);
943 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata)
945 struct beacon_data *old_bcn;
948 old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon,
949 lockdep_is_held(&sdata->wdev.mtx));
950 ret = ieee80211_mesh_build_beacon(&sdata->u.mesh);
952 /* just reuse old beacon */
956 kfree_rcu(old_bcn, rcu_head);
960 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
963 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
964 unsigned long bits = changed;
970 /* if we race with running work, worst case this work becomes a noop */
971 for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
972 set_bit(bit, &ifmsh->mbss_changed);
973 set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
974 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
977 int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
979 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
980 struct ieee80211_local *local = sdata->local;
981 u32 changed = BSS_CHANGED_BEACON |
982 BSS_CHANGED_BEACON_ENABLED |
984 BSS_CHANGED_BASIC_RATES |
985 BSS_CHANGED_BEACON_INT |
986 BSS_CHANGED_MCAST_RATE;
988 local->fif_other_bss++;
989 /* mesh ifaces must set allmulti to forward mcast traffic */
990 atomic_inc(&local->iff_allmultis);
991 ieee80211_configure_filter(local);
993 ifmsh->mesh_cc_id = 0; /* Disabled */
994 /* register sync ops from extensible synchronization framework */
995 ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id);
996 ifmsh->sync_offset_clockdrift_max = 0;
997 set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags);
998 ieee80211_mesh_root_setup(ifmsh);
999 ieee80211_queue_work(&local->hw, &sdata->work);
1000 sdata->vif.bss_conf.ht_operation_mode =
1001 ifmsh->mshcfg.ht_opmode;
1002 sdata->vif.bss_conf.enable_beacon = true;
1004 changed |= ieee80211_mps_local_status_update(sdata);
1006 if (ieee80211_mesh_build_beacon(ifmsh)) {
1007 ieee80211_stop_mesh(sdata);
1011 ieee80211_recalc_dtim(local, sdata);
1012 ieee80211_bss_info_change_notify(sdata, changed);
1014 netif_carrier_on(sdata->dev);
1018 void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata)
1020 struct ieee80211_local *local = sdata->local;
1021 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1022 struct beacon_data *bcn;
1024 netif_carrier_off(sdata->dev);
1026 /* flush STAs and mpaths on this iface */
1027 sta_info_flush(sdata);
1028 ieee80211_free_keys(sdata, true);
1029 mesh_path_flush_by_iface(sdata);
1031 /* stop the beacon */
1032 ifmsh->mesh_id_len = 0;
1033 sdata->vif.bss_conf.enable_beacon = false;
1034 sdata->beacon_rate_set = false;
1035 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
1036 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
1039 bcn = rcu_dereference_protected(ifmsh->beacon,
1040 lockdep_is_held(&sdata->wdev.mtx));
1041 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1042 kfree_rcu(bcn, rcu_head);
1044 /* free all potentially still buffered group-addressed frames */
1045 local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf);
1046 skb_queue_purge(&ifmsh->ps.bc_buf);
1048 del_timer_sync(&sdata->u.mesh.housekeeping_timer);
1049 del_timer_sync(&sdata->u.mesh.mesh_path_root_timer);
1050 del_timer_sync(&sdata->u.mesh.mesh_path_timer);
1052 /* clear any mesh work (for next join) we may have accrued */
1053 ifmsh->wrkq_flags = 0;
1054 ifmsh->mbss_changed = 0;
1056 local->fif_other_bss--;
1057 atomic_dec(&local->iff_allmultis);
1058 ieee80211_configure_filter(local);
1061 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
1065 /* if the current channel is a DFS channel, mark the channel as
1068 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1069 &sdata->vif.bss_conf.chandef,
1070 NL80211_IFTYPE_MESH_POINT);
1072 cfg80211_radar_event(sdata->local->hw.wiphy,
1073 &sdata->vif.bss_conf.chandef, GFP_ATOMIC);
1077 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
1078 struct ieee802_11_elems *elems, bool beacon)
1080 struct cfg80211_csa_settings params;
1081 struct ieee80211_csa_ie csa_ie;
1082 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1083 struct ieee80211_supported_band *sband;
1085 u32 sta_flags, vht_cap_info = 0;
1087 sdata_assert_lock(sdata);
1089 sband = ieee80211_get_sband(sdata);
1094 switch (sdata->vif.bss_conf.chandef.width) {
1095 case NL80211_CHAN_WIDTH_20_NOHT:
1096 sta_flags |= IEEE80211_STA_DISABLE_HT;
1098 case NL80211_CHAN_WIDTH_20:
1099 sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
1101 case NL80211_CHAN_WIDTH_40:
1102 sta_flags |= IEEE80211_STA_DISABLE_VHT;
1108 if (elems->vht_cap_elem)
1110 le32_to_cpu(elems->vht_cap_elem->vht_cap_info);
1112 memset(¶ms, 0, sizeof(params));
1113 err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band,
1115 sta_flags, sdata->vif.addr,
1122 /* Mark the channel unavailable if the reason for the switch is
1125 if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY)
1126 ieee80211_mesh_csa_mark_radar(sdata);
1128 params.chandef = csa_ie.chandef;
1129 params.count = csa_ie.count;
1131 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef,
1132 IEEE80211_CHAN_DISABLED) ||
1133 !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
1134 NL80211_IFTYPE_MESH_POINT)) {
1136 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1138 params.chandef.chan->center_freq,
1139 params.chandef.width,
1140 params.chandef.center_freq1,
1141 params.chandef.center_freq2);
1145 err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
1147 NL80211_IFTYPE_MESH_POINT);
1150 if (err > 0 && !ifmsh->userspace_handles_dfs) {
1152 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1154 params.chandef.chan->center_freq,
1155 params.chandef.width,
1156 params.chandef.center_freq1,
1157 params.chandef.center_freq2);
1161 params.radar_required = err;
1163 if (cfg80211_chandef_identical(¶ms.chandef,
1164 &sdata->vif.bss_conf.chandef)) {
1166 "received csa with an identical chandef, ignoring\n");
1171 "received channel switch announcement to go to channel %d MHz\n",
1172 params.chandef.chan->center_freq);
1174 params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT;
1176 ifmsh->chsw_ttl = csa_ie.ttl - 1;
1177 if (ifmsh->pre_value >= csa_ie.pre_value)
1179 ifmsh->pre_value = csa_ie.pre_value;
1182 if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
1185 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
1187 if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
1195 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata,
1196 struct ieee80211_mgmt *mgmt, size_t len)
1198 struct ieee80211_local *local = sdata->local;
1199 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1200 struct sk_buff *presp;
1201 struct beacon_data *bcn;
1202 struct ieee80211_mgmt *hdr;
1203 struct ieee802_11_elems elems;
1207 pos = mgmt->u.probe_req.variable;
1208 baselen = (u8 *) pos - (u8 *) mgmt;
1212 ieee802_11_parse_elems(pos, len - baselen, false, &elems, mgmt->bssid,
1218 /* 802.11-2012 10.1.4.3.2 */
1219 if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) &&
1220 !is_broadcast_ether_addr(mgmt->da)) ||
1221 elems.ssid_len != 0)
1224 if (elems.mesh_id_len != 0 &&
1225 (elems.mesh_id_len != ifmsh->mesh_id_len ||
1226 memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len)))
1230 bcn = rcu_dereference(ifmsh->beacon);
1235 presp = dev_alloc_skb(local->tx_headroom +
1236 bcn->head_len + bcn->tail_len);
1240 skb_reserve(presp, local->tx_headroom);
1241 skb_put_data(presp, bcn->head, bcn->head_len);
1242 skb_put_data(presp, bcn->tail, bcn->tail_len);
1243 hdr = (struct ieee80211_mgmt *) presp->data;
1244 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1245 IEEE80211_STYPE_PROBE_RESP);
1246 memcpy(hdr->da, mgmt->sa, ETH_ALEN);
1247 IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1248 ieee80211_tx_skb(sdata, presp);
1253 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
1255 struct ieee80211_mgmt *mgmt,
1257 struct ieee80211_rx_status *rx_status)
1259 struct ieee80211_local *local = sdata->local;
1260 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1261 struct ieee802_11_elems elems;
1262 struct ieee80211_channel *channel;
1265 enum nl80211_band band = rx_status->band;
1267 /* ignore ProbeResp to foreign address */
1268 if (stype == IEEE80211_STYPE_PROBE_RESP &&
1269 !ether_addr_equal(mgmt->da, sdata->vif.addr))
1272 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1276 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1277 false, &elems, mgmt->bssid, NULL);
1279 /* ignore non-mesh or secure / unsecure mismatch */
1280 if ((!elems.mesh_id || !elems.mesh_config) ||
1281 (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) ||
1282 (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE))
1285 if (elems.ds_params)
1286 freq = ieee80211_channel_to_frequency(elems.ds_params[0], band);
1288 freq = rx_status->freq;
1290 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1292 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1295 if (mesh_matches_local(sdata, &elems)) {
1296 mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n",
1297 sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal);
1298 if (!sdata->u.mesh.user_mpm ||
1299 sdata->u.mesh.mshcfg.rssi_threshold == 0 ||
1300 sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal)
1301 mesh_neighbour_update(sdata, mgmt->sa, &elems,
1304 if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
1305 !sdata->vif.csa_active)
1306 ieee80211_mesh_process_chnswitch(sdata, &elems, true);
1309 if (ifmsh->sync_ops)
1310 ifmsh->sync_ops->rx_bcn_presp(sdata,
1311 stype, mgmt, &elems, rx_status);
1314 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
1316 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1317 struct mesh_csa_settings *tmp_csa_settings;
1321 /* Reset the TTL value and Initiator flag */
1322 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1323 ifmsh->chsw_ttl = 0;
1325 /* Remove the CSA and MCSP elements from the beacon */
1326 tmp_csa_settings = rcu_dereference_protected(ifmsh->csa,
1327 lockdep_is_held(&sdata->wdev.mtx));
1328 RCU_INIT_POINTER(ifmsh->csa, NULL);
1329 if (tmp_csa_settings)
1330 kfree_rcu(tmp_csa_settings, rcu_head);
1331 ret = ieee80211_mesh_rebuild_beacon(sdata);
1335 changed |= BSS_CHANGED_BEACON;
1337 mcsa_dbg(sdata, "complete switching to center freq %d MHz",
1338 sdata->vif.bss_conf.chandef.chan->center_freq);
1342 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1343 struct cfg80211_csa_settings *csa_settings)
1345 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1346 struct mesh_csa_settings *tmp_csa_settings;
1349 lockdep_assert_held(&sdata->wdev.mtx);
1351 tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings),
1353 if (!tmp_csa_settings)
1356 memcpy(&tmp_csa_settings->settings, csa_settings,
1357 sizeof(struct cfg80211_csa_settings));
1359 rcu_assign_pointer(ifmsh->csa, tmp_csa_settings);
1361 ret = ieee80211_mesh_rebuild_beacon(sdata);
1363 tmp_csa_settings = rcu_dereference(ifmsh->csa);
1364 RCU_INIT_POINTER(ifmsh->csa, NULL);
1365 kfree_rcu(tmp_csa_settings, rcu_head);
1369 return BSS_CHANGED_BEACON;
1372 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata,
1373 struct ieee80211_mgmt *mgmt, size_t len,
1374 struct ieee802_11_elems *elems)
1376 struct ieee80211_mgmt *mgmt_fwd;
1377 struct sk_buff *skb;
1378 struct ieee80211_local *local = sdata->local;
1380 skb = dev_alloc_skb(local->tx_headroom + len);
1383 skb_reserve(skb, local->tx_headroom);
1384 mgmt_fwd = skb_put(skb, len);
1386 elems->mesh_chansw_params_ie->mesh_ttl--;
1387 elems->mesh_chansw_params_ie->mesh_flags &=
1388 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
1390 memcpy(mgmt_fwd, mgmt, len);
1391 eth_broadcast_addr(mgmt_fwd->da);
1392 memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN);
1393 memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN);
1395 ieee80211_tx_skb(sdata, skb);
1399 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
1400 struct ieee80211_mgmt *mgmt, size_t len)
1402 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1403 struct ieee802_11_elems elems;
1405 bool fwd_csa = true;
1409 if (mgmt->u.action.u.measurement.action_code !=
1410 WLAN_ACTION_SPCT_CHL_SWITCH)
1413 pos = mgmt->u.action.u.chan_switch.variable;
1414 baselen = offsetof(struct ieee80211_mgmt,
1415 u.action.u.chan_switch.variable);
1416 ieee802_11_parse_elems(pos, len - baselen, true, &elems,
1419 if (!mesh_matches_local(sdata, &elems))
1422 ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl;
1423 if (!--ifmsh->chsw_ttl)
1426 pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value);
1427 if (ifmsh->pre_value >= pre_value)
1430 ifmsh->pre_value = pre_value;
1432 if (!sdata->vif.csa_active &&
1433 !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
1434 mcsa_dbg(sdata, "Failed to process CSA action frame");
1438 /* forward or re-broadcast the CSA frame */
1440 if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0)
1441 mcsa_dbg(sdata, "Failed to forward the CSA frame");
1445 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
1446 struct ieee80211_mgmt *mgmt,
1448 struct ieee80211_rx_status *rx_status)
1450 switch (mgmt->u.action.category) {
1451 case WLAN_CATEGORY_SELF_PROTECTED:
1452 switch (mgmt->u.action.u.self_prot.action_code) {
1453 case WLAN_SP_MESH_PEERING_OPEN:
1454 case WLAN_SP_MESH_PEERING_CLOSE:
1455 case WLAN_SP_MESH_PEERING_CONFIRM:
1456 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
1460 case WLAN_CATEGORY_MESH_ACTION:
1461 if (mesh_action_is_path_sel(mgmt))
1462 mesh_rx_path_sel_frame(sdata, mgmt, len);
1464 case WLAN_CATEGORY_SPECTRUM_MGMT:
1465 mesh_rx_csa_frame(sdata, mgmt, len);
1470 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1471 struct sk_buff *skb)
1473 struct ieee80211_rx_status *rx_status;
1474 struct ieee80211_mgmt *mgmt;
1479 /* mesh already went down */
1480 if (!sdata->u.mesh.mesh_id_len)
1483 rx_status = IEEE80211_SKB_RXCB(skb);
1484 mgmt = (struct ieee80211_mgmt *) skb->data;
1485 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
1488 case IEEE80211_STYPE_PROBE_RESP:
1489 case IEEE80211_STYPE_BEACON:
1490 ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len,
1493 case IEEE80211_STYPE_PROBE_REQ:
1494 ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len);
1496 case IEEE80211_STYPE_ACTION:
1497 ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
1501 sdata_unlock(sdata);
1504 static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata)
1506 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1507 u32 bit, changed = 0;
1509 for_each_set_bit(bit, &ifmsh->mbss_changed,
1510 sizeof(changed) * BITS_PER_BYTE) {
1511 clear_bit(bit, &ifmsh->mbss_changed);
1512 changed |= BIT(bit);
1515 if (sdata->vif.bss_conf.enable_beacon &&
1516 (changed & (BSS_CHANGED_BEACON |
1518 BSS_CHANGED_BASIC_RATES |
1519 BSS_CHANGED_BEACON_INT)))
1520 if (ieee80211_mesh_rebuild_beacon(sdata))
1523 ieee80211_bss_info_change_notify(sdata, changed);
1526 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata)
1528 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1532 /* mesh already went down */
1533 if (!sdata->u.mesh.mesh_id_len)
1536 if (ifmsh->preq_queue_len &&
1538 ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval)))
1539 mesh_path_start_discovery(sdata);
1541 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags))
1542 ieee80211_mesh_housekeeping(sdata);
1544 if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags))
1545 ieee80211_mesh_rootpath(sdata);
1547 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags))
1548 mesh_sync_adjust_tsf(sdata);
1550 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags))
1551 mesh_bss_info_changed(sdata);
1553 sdata_unlock(sdata);
1557 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
1559 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
1560 static u8 zero_addr[ETH_ALEN] = {};
1562 timer_setup(&ifmsh->housekeeping_timer,
1563 ieee80211_mesh_housekeeping_timer, 0);
1565 ifmsh->accepting_plinks = true;
1566 atomic_set(&ifmsh->mpaths, 0);
1567 mesh_rmc_init(sdata);
1568 ifmsh->last_preq = jiffies;
1569 ifmsh->next_perr = jiffies;
1570 ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
1571 /* Allocate all mesh structures when creating the first mesh interface. */
1572 if (!mesh_allocated)
1575 mesh_pathtbl_init(sdata);
1577 timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0);
1578 timer_setup(&ifmsh->mesh_path_root_timer,
1579 ieee80211_mesh_path_root_timer, 0);
1580 INIT_LIST_HEAD(&ifmsh->preq_queue.list);
1581 skb_queue_head_init(&ifmsh->ps.bc_buf);
1582 spin_lock_init(&ifmsh->mesh_preq_queue_lock);
1583 spin_lock_init(&ifmsh->sync_offset_lock);
1584 RCU_INIT_POINTER(ifmsh->beacon, NULL);
1586 sdata->vif.bss_conf.bssid = zero_addr;
1589 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1591 mesh_rmc_free(sdata);
1592 mesh_pathtbl_unregister(sdata);