2 * Copyright (c) 2008, 2009 open80211s Ltd.
3 * Author: Luis Carlos Cobo <luisca@cozybit.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/kernel.h>
11 #include <linux/random.h>
12 #include "ieee80211_i.h"
16 #define PLINK_GET_LLID(p) (p + 2)
17 #define PLINK_GET_PLID(p) (p + 4)
19 #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
20 jiffies + HZ * t / 1000))
22 /* We only need a valid sta if user configured a minimum rssi_threshold. */
23 #define rssi_threshold_check(sta, sdata) \
24 (sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\
25 (sta && (s8) -ewma_read(&sta->avg_signal) > \
26 sdata->u.mesh.mshcfg.rssi_threshold))
40 static const char * const mplstates[] = {
41 [NL80211_PLINK_LISTEN] = "LISTEN",
42 [NL80211_PLINK_OPN_SNT] = "OPN-SNT",
43 [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
44 [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
45 [NL80211_PLINK_ESTAB] = "ESTAB",
46 [NL80211_PLINK_HOLDING] = "HOLDING",
47 [NL80211_PLINK_BLOCKED] = "BLOCKED"
50 static const char * const mplevents[] = {
51 [PLINK_UNDEFINED] = "NONE",
52 [OPN_ACPT] = "OPN_ACPT",
53 [OPN_RJCT] = "OPN_RJCT",
54 [OPN_IGNR] = "OPN_IGNR",
55 [CNF_ACPT] = "CNF_ACPT",
56 [CNF_RJCT] = "CNF_RJCT",
57 [CNF_IGNR] = "CNF_IGNR",
58 [CLS_ACPT] = "CLS_ACPT",
59 [CLS_IGNR] = "CLS_IGNR"
62 static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
63 enum ieee80211_self_protected_actioncode action,
64 u8 *da, __le16 llid, __le16 plid, __le16 reason);
67 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
69 * @sta: mesh peer link to restart
71 * Locking: this function must be called holding sta->lock
73 static inline void mesh_plink_fsm_restart(struct sta_info *sta)
75 sta->plink_state = NL80211_PLINK_LISTEN;
76 sta->llid = sta->plid = sta->reason = 0;
77 sta->plink_retries = 0;
81 * mesh_set_short_slot_time - enable / disable ERP short slot time.
83 * The standard indirectly mandates mesh STAs to turn off short slot time by
84 * disallowing advertising this (802.11-2012 8.4.1.4), but that doesn't mean we
85 * can't be sneaky about it. Enable short slot time if all mesh STAs in the
86 * MBSS support ERP rates.
88 * Returns BSS_CHANGED_ERP_SLOT or 0 for no change.
90 static u32 mesh_set_short_slot_time(struct ieee80211_sub_if_data *sdata)
92 struct ieee80211_local *local = sdata->local;
93 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
94 struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
96 u32 erp_rates = 0, changed = 0;
98 bool short_slot = false;
100 if (band == IEEE80211_BAND_5GHZ) {
101 /* (IEEE 802.11-2012 19.4.5) */
104 } else if (band != IEEE80211_BAND_2GHZ ||
105 (band == IEEE80211_BAND_2GHZ &&
106 local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
109 for (i = 0; i < sband->n_bitrates; i++)
110 if (sband->bitrates[i].flags & IEEE80211_RATE_ERP_G)
117 list_for_each_entry_rcu(sta, &local->sta_list, list) {
118 if (sdata != sta->sdata ||
119 sta->plink_state != NL80211_PLINK_ESTAB)
123 if (erp_rates & sta->sta.supp_rates[band])
131 if (sdata->vif.bss_conf.use_short_slot != short_slot) {
132 sdata->vif.bss_conf.use_short_slot = short_slot;
133 changed = BSS_CHANGED_ERP_SLOT;
134 mpl_dbg(sdata, "mesh_plink %pM: ERP short slot time %d\n",
135 sdata->vif.addr, short_slot);
141 * mesh_set_ht_prot_mode - set correct HT protection mode
143 * Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
144 * mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
145 * mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
146 * selected if any non-HT peers are present in our MBSS. 20MHz-protection mode
147 * is selected if all peers in our 20/40MHz MBSS support HT and atleast one
148 * HT20 peer is present. Otherwise no-protection mode is selected.
150 static u32 mesh_set_ht_prot_mode(struct ieee80211_sub_if_data *sdata)
152 struct ieee80211_local *local = sdata->local;
153 struct sta_info *sta;
155 bool non_ht_sta = false, ht20_sta = false;
157 if (sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT)
161 list_for_each_entry_rcu(sta, &local->sta_list, list) {
162 if (sdata != sta->sdata ||
163 sta->plink_state != NL80211_PLINK_ESTAB)
166 if (sta->sta.bandwidth > IEEE80211_STA_RX_BW_20)
169 if (!sta->sta.ht_cap.ht_supported) {
170 mpl_dbg(sdata, "nonHT sta (%pM) is present\n",
176 mpl_dbg(sdata, "HT20 sta (%pM) is present\n", sta->sta.addr);
182 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED;
184 sdata->vif.bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
185 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_20MHZ;
187 ht_opmode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
189 if (sdata->vif.bss_conf.ht_operation_mode == ht_opmode)
192 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
193 sdata->u.mesh.mshcfg.ht_opmode = ht_opmode;
194 mpl_dbg(sdata, "selected new HT protection mode %d\n", ht_opmode);
195 return BSS_CHANGED_HT;
199 * __mesh_plink_deactivate - deactivate mesh peer link
201 * @sta: mesh peer link to deactivate
203 * All mesh paths with this peer as next hop will be flushed
204 * Returns beacon changed flag if the beacon content changed.
206 * Locking: the caller must hold sta->lock
208 static u32 __mesh_plink_deactivate(struct sta_info *sta)
210 struct ieee80211_sub_if_data *sdata = sta->sdata;
213 if (sta->plink_state == NL80211_PLINK_ESTAB)
214 changed = mesh_plink_dec_estab_count(sdata);
215 sta->plink_state = NL80211_PLINK_BLOCKED;
216 mesh_path_flush_by_nexthop(sta);
218 ieee80211_mps_sta_status_update(sta);
219 changed |= ieee80211_mps_local_status_update(sdata);
225 * mesh_plink_deactivate - deactivate mesh peer link
227 * @sta: mesh peer link to deactivate
229 * All mesh paths with this peer as next hop will be flushed
231 u32 mesh_plink_deactivate(struct sta_info *sta)
233 struct ieee80211_sub_if_data *sdata = sta->sdata;
236 spin_lock_bh(&sta->lock);
237 changed = __mesh_plink_deactivate(sta);
238 sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED);
239 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
240 sta->sta.addr, sta->llid, sta->plid,
242 spin_unlock_bh(&sta->lock);
247 static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
248 enum ieee80211_self_protected_actioncode action,
249 u8 *da, __le16 llid, __le16 plid, __le16 reason)
251 struct ieee80211_local *local = sdata->local;
253 struct ieee80211_tx_info *info;
254 struct ieee80211_mgmt *mgmt;
255 bool include_plid = false;
256 u16 peering_proto = 0;
258 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) +
259 sizeof(mgmt->u.action.u.self_prot);
262 skb = dev_alloc_skb(local->tx_headroom +
264 2 + /* capability info */
266 2 + 8 + /* supported rates */
267 2 + (IEEE80211_MAX_SUPP_RATES - 8) +
268 2 + sdata->u.mesh.mesh_id_len +
269 2 + sizeof(struct ieee80211_meshconf_ie) +
270 2 + sizeof(struct ieee80211_ht_cap) +
271 2 + sizeof(struct ieee80211_ht_operation) +
272 2 + 8 + /* peering IE */
273 sdata->u.mesh.ie_len);
276 info = IEEE80211_SKB_CB(skb);
277 skb_reserve(skb, local->tx_headroom);
278 mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len);
279 memset(mgmt, 0, hdr_len);
280 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
281 IEEE80211_STYPE_ACTION);
282 memcpy(mgmt->da, da, ETH_ALEN);
283 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
284 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
285 mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED;
286 mgmt->u.action.u.self_prot.action_code = action;
288 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
289 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
291 /* capability info */
292 pos = skb_put(skb, 2);
294 if (action == WLAN_SP_MESH_PEERING_CONFIRM) {
296 pos = skb_put(skb, 2);
297 memcpy(pos + 2, &plid, 2);
299 if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
300 ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
301 mesh_add_rsn_ie(sdata, skb) ||
302 mesh_add_meshid_ie(sdata, skb) ||
303 mesh_add_meshconf_ie(sdata, skb))
305 } else { /* WLAN_SP_MESH_PEERING_CLOSE */
306 info->flags |= IEEE80211_TX_CTL_NO_ACK;
307 if (mesh_add_meshid_ie(sdata, skb))
311 /* Add Mesh Peering Management element */
313 case WLAN_SP_MESH_PEERING_OPEN:
315 case WLAN_SP_MESH_PEERING_CONFIRM:
319 case WLAN_SP_MESH_PEERING_CLOSE:
324 ie_len += 2; /* reason code */
331 if (WARN_ON(skb_tailroom(skb) < 2 + ie_len))
334 pos = skb_put(skb, 2 + ie_len);
335 *pos++ = WLAN_EID_PEER_MGMT;
337 memcpy(pos, &peering_proto, 2);
339 memcpy(pos, &llid, 2);
342 memcpy(pos, &plid, 2);
345 if (action == WLAN_SP_MESH_PEERING_CLOSE) {
346 memcpy(pos, &reason, 2);
350 if (action != WLAN_SP_MESH_PEERING_CLOSE) {
351 if (mesh_add_ht_cap_ie(sdata, skb) ||
352 mesh_add_ht_oper_ie(sdata, skb))
356 if (mesh_add_vendor_ies(sdata, skb))
359 ieee80211_tx_skb(sdata, skb);
366 static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
367 struct sta_info *sta,
368 struct ieee802_11_elems *elems, bool insert)
370 struct ieee80211_local *local = sdata->local;
371 enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
372 struct ieee80211_supported_band *sband;
373 u32 rates, basic_rates = 0, changed = 0;
375 sband = local->hw.wiphy->bands[band];
376 rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates);
378 spin_lock_bh(&sta->lock);
379 sta->last_rx = jiffies;
381 /* rates and capabilities don't change during peering */
382 if (sta->plink_state == NL80211_PLINK_ESTAB)
385 if (sta->sta.supp_rates[band] != rates)
386 changed |= IEEE80211_RC_SUPP_RATES_CHANGED;
387 sta->sta.supp_rates[band] = rates;
389 if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
390 elems->ht_cap_elem, sta))
391 changed |= IEEE80211_RC_BW_CHANGED;
393 /* HT peer is operating 20MHz-only */
394 if (elems->ht_operation &&
395 !(elems->ht_operation->ht_param &
396 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
397 if (sta->sta.bandwidth != IEEE80211_STA_RX_BW_20)
398 changed |= IEEE80211_RC_BW_CHANGED;
399 sta->sta.bandwidth = IEEE80211_STA_RX_BW_20;
403 rate_control_rate_init(sta);
405 rate_control_rate_update(local, sband, sta, changed);
407 spin_unlock_bh(&sta->lock);
410 static struct sta_info *
411 __mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
413 struct sta_info *sta;
415 if (sdata->local->num_sta >= MESH_MAX_PLINKS)
418 sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
422 sta->plink_state = NL80211_PLINK_LISTEN;
424 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
425 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
426 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
428 set_sta_flag(sta, WLAN_STA_WME);
433 static struct sta_info *
434 mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
435 struct ieee802_11_elems *elems)
437 struct sta_info *sta = NULL;
439 /* Userspace handles station allocation */
440 if (sdata->u.mesh.user_mpm ||
441 sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
442 cfg80211_notify_new_peer_candidate(sdata->dev, addr,
447 sta = __mesh_sta_info_alloc(sdata, addr);
453 * mesh_sta_info_get - return mesh sta info entry for @addr.
455 * @sdata: local meshif
456 * @addr: peer's address
457 * @elems: IEs from beacon or mesh peering frame.
459 * Return existing or newly allocated sta_info under RCU read lock.
460 * (re)initialize with given IEs.
462 static struct sta_info *
463 mesh_sta_info_get(struct ieee80211_sub_if_data *sdata,
464 u8 *addr, struct ieee802_11_elems *elems) __acquires(RCU)
466 struct sta_info *sta = NULL;
469 sta = sta_info_get(sdata, addr);
471 mesh_sta_info_init(sdata, sta, elems, false);
474 /* can't run atomic */
475 sta = mesh_sta_info_alloc(sdata, addr, elems);
481 mesh_sta_info_init(sdata, sta, elems, true);
483 if (sta_info_insert_rcu(sta))
491 * mesh_neighbour_update - update or initialize new mesh neighbor.
493 * @sdata: local meshif
494 * @addr: peer's address
495 * @elems: IEs from beacon or mesh peering frame
497 * Initiates peering if appropriate.
499 void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
501 struct ieee802_11_elems *elems)
503 struct sta_info *sta;
506 sta = mesh_sta_info_get(sdata, hw_addr, elems);
510 if (mesh_peer_accepts_plinks(elems) &&
511 sta->plink_state == NL80211_PLINK_LISTEN &&
512 sdata->u.mesh.accepting_plinks &&
513 sdata->u.mesh.mshcfg.auto_open_plinks &&
514 rssi_threshold_check(sta, sdata))
515 changed = mesh_plink_open(sta);
517 ieee80211_mps_frame_release(sta, elems);
520 ieee80211_mbss_info_change_notify(sdata, changed);
523 static void mesh_plink_timer(unsigned long data)
525 struct sta_info *sta;
526 __le16 llid, plid, reason;
527 struct ieee80211_sub_if_data *sdata;
528 struct mesh_config *mshcfg;
531 * This STA is valid because sta_info_destroy() will
532 * del_timer_sync() this timer after having made sure
533 * it cannot be readded (by deleting the plink.)
535 sta = (struct sta_info *) data;
537 if (sta->sdata->local->quiescing)
540 spin_lock_bh(&sta->lock);
541 if (sta->ignore_plink_timer) {
542 sta->ignore_plink_timer = false;
543 spin_unlock_bh(&sta->lock);
547 "Mesh plink timer for %pM fired on state %s\n",
548 sta->sta.addr, mplstates[sta->plink_state]);
553 mshcfg = &sdata->u.mesh.mshcfg;
555 switch (sta->plink_state) {
556 case NL80211_PLINK_OPN_RCVD:
557 case NL80211_PLINK_OPN_SNT:
559 if (sta->plink_retries < mshcfg->dot11MeshMaxRetries) {
562 "Mesh plink for %pM (retry, timeout): %d %d\n",
563 sta->sta.addr, sta->plink_retries,
565 get_random_bytes(&rand, sizeof(u32));
566 sta->plink_timeout = sta->plink_timeout +
567 rand % sta->plink_timeout;
568 ++sta->plink_retries;
569 mod_plink_timer(sta, sta->plink_timeout);
570 spin_unlock_bh(&sta->lock);
571 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
572 sta->sta.addr, llid, 0, 0);
575 reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES);
576 /* fall through on else */
577 case NL80211_PLINK_CNF_RCVD:
580 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT);
581 sta->plink_state = NL80211_PLINK_HOLDING;
582 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
583 spin_unlock_bh(&sta->lock);
584 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
585 sta->sta.addr, llid, plid, reason);
587 case NL80211_PLINK_HOLDING:
589 del_timer(&sta->plink_timer);
590 mesh_plink_fsm_restart(sta);
591 spin_unlock_bh(&sta->lock);
594 spin_unlock_bh(&sta->lock);
599 static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
601 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
602 sta->plink_timer.data = (unsigned long) sta;
603 sta->plink_timer.function = mesh_plink_timer;
604 sta->plink_timeout = timeout;
605 add_timer(&sta->plink_timer);
608 u32 mesh_plink_open(struct sta_info *sta)
611 struct ieee80211_sub_if_data *sdata = sta->sdata;
614 if (!test_sta_flag(sta, WLAN_STA_AUTH))
617 spin_lock_bh(&sta->lock);
618 get_random_bytes(&llid, 2);
620 if (sta->plink_state != NL80211_PLINK_LISTEN &&
621 sta->plink_state != NL80211_PLINK_BLOCKED) {
622 spin_unlock_bh(&sta->lock);
625 sta->plink_state = NL80211_PLINK_OPN_SNT;
626 mesh_plink_timer_set(sta, sdata->u.mesh.mshcfg.dot11MeshRetryTimeout);
627 spin_unlock_bh(&sta->lock);
629 "Mesh plink: starting establishment with %pM\n",
632 /* set the non-peer mode to active during peering */
633 changed = ieee80211_mps_local_status_update(sdata);
635 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
636 sta->sta.addr, llid, 0, 0);
640 u32 mesh_plink_block(struct sta_info *sta)
644 spin_lock_bh(&sta->lock);
645 changed = __mesh_plink_deactivate(sta);
646 sta->plink_state = NL80211_PLINK_BLOCKED;
647 spin_unlock_bh(&sta->lock);
653 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
654 struct ieee80211_mgmt *mgmt, size_t len,
655 struct ieee80211_rx_status *rx_status)
657 struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;
658 struct ieee802_11_elems elems;
659 struct sta_info *sta;
660 enum plink_event event;
661 enum ieee80211_self_protected_actioncode ftype;
663 bool matches_local = true;
667 __le16 plid, llid, reason;
669 /* need action_code, aux */
670 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
673 if (sdata->u.mesh.user_mpm)
674 /* userspace must register for these */
677 if (is_multicast_ether_addr(mgmt->da)) {
679 "Mesh plink: ignore frame from multicast address\n");
683 baseaddr = mgmt->u.action.u.self_prot.variable;
684 baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt;
685 if (mgmt->u.action.u.self_prot.action_code ==
686 WLAN_SP_MESH_PEERING_CONFIRM) {
690 ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems);
692 if (!elems.peering) {
694 "Mesh plink: missing necessary peer link ie\n");
699 sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
701 "Mesh plink: can't establish link with secure peer\n");
705 ftype = mgmt->u.action.u.self_prot.action_code;
706 ie_len = elems.peering_len;
707 if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) ||
708 (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) ||
709 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6
712 "Mesh plink: incorrect plink ie length %d %d\n",
717 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
718 (!elems.mesh_id || !elems.mesh_config)) {
719 mpl_dbg(sdata, "Mesh plink: missing necessary ie\n");
722 /* Note the lines below are correct, the llid in the frame is the plid
723 * from the point of view of this host.
725 memcpy(&plid, PLINK_GET_LLID(elems.peering), 2);
726 if (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||
727 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8))
728 memcpy(&llid, PLINK_GET_PLID(elems.peering), 2);
730 /* WARNING: Only for sta pointer, is dropped & re-acquired */
733 sta = sta_info_get(sdata, mgmt->sa);
734 if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) {
735 mpl_dbg(sdata, "Mesh plink: cls or cnf from unknown peer\n");
740 if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
741 !rssi_threshold_check(sta, sdata)) {
742 mpl_dbg(sdata, "Mesh plink: %pM does not meet rssi threshold\n",
748 if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
749 mpl_dbg(sdata, "Mesh plink: Action frame from non-authed peer\n");
754 if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
759 /* Now we will figure out the appropriate event... */
760 event = PLINK_UNDEFINED;
761 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
762 !mesh_matches_local(sdata, &elems)) {
763 matches_local = false;
765 case WLAN_SP_MESH_PEERING_OPEN:
768 case WLAN_SP_MESH_PEERING_CONFIRM:
776 if (!sta && !matches_local) {
778 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
780 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
781 mgmt->sa, llid, plid, reason);
784 /* ftype == WLAN_SP_MESH_PEERING_OPEN */
785 if (!mesh_plink_free_count(sdata)) {
786 mpl_dbg(sdata, "Mesh plink error: no more free plinks\n");
791 } else if (matches_local) {
793 case WLAN_SP_MESH_PEERING_OPEN:
794 if (!mesh_plink_free_count(sdata) ||
795 (sta->plid && sta->plid != plid))
800 case WLAN_SP_MESH_PEERING_CONFIRM:
801 if (!mesh_plink_free_count(sdata) ||
802 (sta->llid != llid || sta->plid != plid))
807 case WLAN_SP_MESH_PEERING_CLOSE:
808 if (sta->plink_state == NL80211_PLINK_ESTAB)
809 /* Do not check for llid or plid. This does not
810 * follow the standard but since multiple plinks
811 * per sta are not supported, it is necessary in
812 * order to avoid a livelock when MP A sees an
813 * establish peer link to MP B but MP B does not
814 * see it. This can be caused by a timeout in
815 * B's peer link establishment or B beign
819 else if (sta->plid != plid)
821 else if (ie_len == 7 && sta->llid != llid)
827 mpl_dbg(sdata, "Mesh plink: unknown frame subtype\n");
833 if (event == OPN_ACPT) {
835 /* allocate sta entry if necessary and update info */
836 sta = mesh_sta_info_get(sdata, mgmt->sa, &elems);
838 mpl_dbg(sdata, "Mesh plink: failed to init peer!\n");
844 mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,
845 mplstates[sta->plink_state], mplevents[event]);
847 spin_lock_bh(&sta->lock);
848 switch (sta->plink_state) {
849 /* spin_unlock as soon as state is updated at each case */
850 case NL80211_PLINK_LISTEN:
853 mesh_plink_fsm_restart(sta);
854 spin_unlock_bh(&sta->lock);
857 sta->plink_state = NL80211_PLINK_OPN_RCVD;
859 get_random_bytes(&llid, 2);
861 mesh_plink_timer_set(sta,
862 mshcfg->dot11MeshRetryTimeout);
864 /* set the non-peer mode to active during peering */
865 changed |= ieee80211_mps_local_status_update(sdata);
867 spin_unlock_bh(&sta->lock);
868 mesh_plink_frame_tx(sdata,
869 WLAN_SP_MESH_PEERING_OPEN,
870 sta->sta.addr, llid, 0, 0);
871 mesh_plink_frame_tx(sdata,
872 WLAN_SP_MESH_PEERING_CONFIRM,
873 sta->sta.addr, llid, plid, 0);
876 spin_unlock_bh(&sta->lock);
881 case NL80211_PLINK_OPN_SNT:
885 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
888 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
889 sta->reason = reason;
890 sta->plink_state = NL80211_PLINK_HOLDING;
891 if (!mod_plink_timer(sta,
892 mshcfg->dot11MeshHoldingTimeout))
893 sta->ignore_plink_timer = true;
896 spin_unlock_bh(&sta->lock);
897 mesh_plink_frame_tx(sdata,
898 WLAN_SP_MESH_PEERING_CLOSE,
899 sta->sta.addr, llid, plid, reason);
902 /* retry timer is left untouched */
903 sta->plink_state = NL80211_PLINK_OPN_RCVD;
906 spin_unlock_bh(&sta->lock);
907 mesh_plink_frame_tx(sdata,
908 WLAN_SP_MESH_PEERING_CONFIRM,
909 sta->sta.addr, llid, plid, 0);
912 sta->plink_state = NL80211_PLINK_CNF_RCVD;
913 if (!mod_plink_timer(sta,
914 mshcfg->dot11MeshConfirmTimeout))
915 sta->ignore_plink_timer = true;
917 spin_unlock_bh(&sta->lock);
920 spin_unlock_bh(&sta->lock);
925 case NL80211_PLINK_OPN_RCVD:
929 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
932 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
933 sta->reason = reason;
934 sta->plink_state = NL80211_PLINK_HOLDING;
935 if (!mod_plink_timer(sta,
936 mshcfg->dot11MeshHoldingTimeout))
937 sta->ignore_plink_timer = true;
940 spin_unlock_bh(&sta->lock);
941 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
942 sta->sta.addr, llid, plid, reason);
946 spin_unlock_bh(&sta->lock);
947 mesh_plink_frame_tx(sdata,
948 WLAN_SP_MESH_PEERING_CONFIRM,
949 sta->sta.addr, llid, plid, 0);
952 del_timer(&sta->plink_timer);
953 sta->plink_state = NL80211_PLINK_ESTAB;
954 spin_unlock_bh(&sta->lock);
955 changed |= mesh_plink_inc_estab_count(sdata);
956 changed |= mesh_set_ht_prot_mode(sdata);
957 changed |= mesh_set_short_slot_time(sdata);
958 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
960 ieee80211_mps_sta_status_update(sta);
961 changed |= ieee80211_mps_set_sta_local_pm(sta,
965 spin_unlock_bh(&sta->lock);
970 case NL80211_PLINK_CNF_RCVD:
974 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
977 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
978 sta->reason = reason;
979 sta->plink_state = NL80211_PLINK_HOLDING;
980 if (!mod_plink_timer(sta,
981 mshcfg->dot11MeshHoldingTimeout))
982 sta->ignore_plink_timer = true;
985 spin_unlock_bh(&sta->lock);
986 mesh_plink_frame_tx(sdata,
987 WLAN_SP_MESH_PEERING_CLOSE,
988 sta->sta.addr, llid, plid, reason);
991 del_timer(&sta->plink_timer);
992 sta->plink_state = NL80211_PLINK_ESTAB;
993 spin_unlock_bh(&sta->lock);
994 changed |= mesh_plink_inc_estab_count(sdata);
995 changed |= mesh_set_ht_prot_mode(sdata);
996 changed |= mesh_set_short_slot_time(sdata);
997 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
999 mesh_plink_frame_tx(sdata,
1000 WLAN_SP_MESH_PEERING_CONFIRM,
1001 sta->sta.addr, llid, plid, 0);
1002 ieee80211_mps_sta_status_update(sta);
1003 changed |= ieee80211_mps_set_sta_local_pm(sta,
1004 mshcfg->power_mode);
1007 spin_unlock_bh(&sta->lock);
1012 case NL80211_PLINK_ESTAB:
1015 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
1016 sta->reason = reason;
1017 changed |= __mesh_plink_deactivate(sta);
1018 sta->plink_state = NL80211_PLINK_HOLDING;
1020 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
1021 spin_unlock_bh(&sta->lock);
1022 changed |= mesh_set_ht_prot_mode(sdata);
1023 changed |= mesh_set_short_slot_time(sdata);
1024 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1025 sta->sta.addr, llid, plid, reason);
1029 spin_unlock_bh(&sta->lock);
1030 mesh_plink_frame_tx(sdata,
1031 WLAN_SP_MESH_PEERING_CONFIRM,
1032 sta->sta.addr, llid, plid, 0);
1035 spin_unlock_bh(&sta->lock);
1039 case NL80211_PLINK_HOLDING:
1042 if (del_timer(&sta->plink_timer))
1043 sta->ignore_plink_timer = 1;
1044 mesh_plink_fsm_restart(sta);
1045 spin_unlock_bh(&sta->lock);
1052 reason = sta->reason;
1053 spin_unlock_bh(&sta->lock);
1054 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1055 sta->sta.addr, llid, plid, reason);
1058 spin_unlock_bh(&sta->lock);
1062 /* should not get here, PLINK_BLOCKED is dealt with at the
1063 * beginning of the function
1065 spin_unlock_bh(&sta->lock);
1072 ieee80211_mbss_info_change_notify(sdata, changed);