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;
423 init_timer(&sta->plink_timer);
425 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
426 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
427 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
429 set_sta_flag(sta, WLAN_STA_WME);
434 static struct sta_info *
435 mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *addr,
436 struct ieee802_11_elems *elems)
438 struct sta_info *sta = NULL;
440 /* Userspace handles peer allocation when security is enabled */
441 if (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) {
538 sta->plink_timer_was_running = true;
542 spin_lock_bh(&sta->lock);
543 if (sta->ignore_plink_timer) {
544 sta->ignore_plink_timer = false;
545 spin_unlock_bh(&sta->lock);
549 "Mesh plink timer for %pM fired on state %d\n",
550 sta->sta.addr, sta->plink_state);
555 mshcfg = &sdata->u.mesh.mshcfg;
557 switch (sta->plink_state) {
558 case NL80211_PLINK_OPN_RCVD:
559 case NL80211_PLINK_OPN_SNT:
561 if (sta->plink_retries < mshcfg->dot11MeshMaxRetries) {
564 "Mesh plink for %pM (retry, timeout): %d %d\n",
565 sta->sta.addr, sta->plink_retries,
567 get_random_bytes(&rand, sizeof(u32));
568 sta->plink_timeout = sta->plink_timeout +
569 rand % sta->plink_timeout;
570 ++sta->plink_retries;
571 mod_plink_timer(sta, sta->plink_timeout);
572 spin_unlock_bh(&sta->lock);
573 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
574 sta->sta.addr, llid, 0, 0);
577 reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES);
578 /* fall through on else */
579 case NL80211_PLINK_CNF_RCVD:
582 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT);
583 sta->plink_state = NL80211_PLINK_HOLDING;
584 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
585 spin_unlock_bh(&sta->lock);
586 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
587 sta->sta.addr, llid, plid, reason);
589 case NL80211_PLINK_HOLDING:
591 del_timer(&sta->plink_timer);
592 mesh_plink_fsm_restart(sta);
593 spin_unlock_bh(&sta->lock);
596 spin_unlock_bh(&sta->lock);
602 void mesh_plink_quiesce(struct sta_info *sta)
604 if (!ieee80211_vif_is_mesh(&sta->sdata->vif))
607 /* no kernel mesh sta timers have been initialized */
608 if (sta->sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)
611 if (del_timer_sync(&sta->plink_timer))
612 sta->plink_timer_was_running = true;
615 void mesh_plink_restart(struct sta_info *sta)
617 if (sta->plink_timer_was_running) {
618 add_timer(&sta->plink_timer);
619 sta->plink_timer_was_running = false;
624 static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
626 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
627 sta->plink_timer.data = (unsigned long) sta;
628 sta->plink_timer.function = mesh_plink_timer;
629 sta->plink_timeout = timeout;
630 add_timer(&sta->plink_timer);
633 u32 mesh_plink_open(struct sta_info *sta)
636 struct ieee80211_sub_if_data *sdata = sta->sdata;
639 if (!test_sta_flag(sta, WLAN_STA_AUTH))
642 spin_lock_bh(&sta->lock);
643 get_random_bytes(&llid, 2);
645 if (sta->plink_state != NL80211_PLINK_LISTEN &&
646 sta->plink_state != NL80211_PLINK_BLOCKED) {
647 spin_unlock_bh(&sta->lock);
650 sta->plink_state = NL80211_PLINK_OPN_SNT;
651 mesh_plink_timer_set(sta, sdata->u.mesh.mshcfg.dot11MeshRetryTimeout);
652 spin_unlock_bh(&sta->lock);
654 "Mesh plink: starting establishment with %pM\n",
657 /* set the non-peer mode to active during peering */
658 changed = ieee80211_mps_local_status_update(sdata);
660 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN,
661 sta->sta.addr, llid, 0, 0);
665 u32 mesh_plink_block(struct sta_info *sta)
669 spin_lock_bh(&sta->lock);
670 changed = __mesh_plink_deactivate(sta);
671 sta->plink_state = NL80211_PLINK_BLOCKED;
672 spin_unlock_bh(&sta->lock);
678 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
679 struct ieee80211_mgmt *mgmt, size_t len,
680 struct ieee80211_rx_status *rx_status)
682 struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;
683 struct ieee802_11_elems elems;
684 struct sta_info *sta;
685 enum plink_event event;
686 enum ieee80211_self_protected_actioncode ftype;
688 bool matches_local = true;
692 __le16 plid, llid, reason;
694 /* need action_code, aux */
695 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
698 if (is_multicast_ether_addr(mgmt->da)) {
700 "Mesh plink: ignore frame from multicast address\n");
704 baseaddr = mgmt->u.action.u.self_prot.variable;
705 baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt;
706 if (mgmt->u.action.u.self_prot.action_code ==
707 WLAN_SP_MESH_PEERING_CONFIRM) {
711 ieee802_11_parse_elems(baseaddr, len - baselen, &elems);
713 if (!elems.peering) {
715 "Mesh plink: missing necessary peer link ie\n");
720 sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
722 "Mesh plink: can't establish link with secure peer\n");
726 ftype = mgmt->u.action.u.self_prot.action_code;
727 ie_len = elems.peering_len;
728 if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) ||
729 (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) ||
730 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6
733 "Mesh plink: incorrect plink ie length %d %d\n",
738 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
739 (!elems.mesh_id || !elems.mesh_config)) {
740 mpl_dbg(sdata, "Mesh plink: missing necessary ie\n");
743 /* Note the lines below are correct, the llid in the frame is the plid
744 * from the point of view of this host.
746 memcpy(&plid, PLINK_GET_LLID(elems.peering), 2);
747 if (ftype == WLAN_SP_MESH_PEERING_CONFIRM ||
748 (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8))
749 memcpy(&llid, PLINK_GET_PLID(elems.peering), 2);
751 /* WARNING: Only for sta pointer, is dropped & re-acquired */
754 sta = sta_info_get(sdata, mgmt->sa);
755 if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) {
756 mpl_dbg(sdata, "Mesh plink: cls or cnf from unknown peer\n");
761 if (ftype == WLAN_SP_MESH_PEERING_OPEN &&
762 !rssi_threshold_check(sta, sdata)) {
763 mpl_dbg(sdata, "Mesh plink: %pM does not meet rssi threshold\n",
769 if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) {
770 mpl_dbg(sdata, "Mesh plink: Action frame from non-authed peer\n");
775 if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
780 /* Now we will figure out the appropriate event... */
781 event = PLINK_UNDEFINED;
782 if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
783 !mesh_matches_local(sdata, &elems)) {
784 matches_local = false;
786 case WLAN_SP_MESH_PEERING_OPEN:
789 case WLAN_SP_MESH_PEERING_CONFIRM:
797 if (!sta && !matches_local) {
799 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
801 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
802 mgmt->sa, llid, plid, reason);
805 /* ftype == WLAN_SP_MESH_PEERING_OPEN */
806 if (!mesh_plink_free_count(sdata)) {
807 mpl_dbg(sdata, "Mesh plink error: no more free plinks\n");
812 } else if (matches_local) {
814 case WLAN_SP_MESH_PEERING_OPEN:
815 if (!mesh_plink_free_count(sdata) ||
816 (sta->plid && sta->plid != plid))
821 case WLAN_SP_MESH_PEERING_CONFIRM:
822 if (!mesh_plink_free_count(sdata) ||
823 (sta->llid != llid || sta->plid != plid))
828 case WLAN_SP_MESH_PEERING_CLOSE:
829 if (sta->plink_state == NL80211_PLINK_ESTAB)
830 /* Do not check for llid or plid. This does not
831 * follow the standard but since multiple plinks
832 * per sta are not supported, it is necessary in
833 * order to avoid a livelock when MP A sees an
834 * establish peer link to MP B but MP B does not
835 * see it. This can be caused by a timeout in
836 * B's peer link establishment or B beign
840 else if (sta->plid != plid)
842 else if (ie_len == 7 && sta->llid != llid)
848 mpl_dbg(sdata, "Mesh plink: unknown frame subtype\n");
854 if (event == OPN_ACPT) {
856 /* allocate sta entry if necessary and update info */
857 sta = mesh_sta_info_get(sdata, mgmt->sa, &elems);
859 mpl_dbg(sdata, "Mesh plink: failed to init peer!\n");
865 mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,
866 mplstates[sta->plink_state], mplevents[event]);
868 spin_lock_bh(&sta->lock);
869 switch (sta->plink_state) {
870 /* spin_unlock as soon as state is updated at each case */
871 case NL80211_PLINK_LISTEN:
874 mesh_plink_fsm_restart(sta);
875 spin_unlock_bh(&sta->lock);
878 sta->plink_state = NL80211_PLINK_OPN_RCVD;
880 get_random_bytes(&llid, 2);
882 mesh_plink_timer_set(sta,
883 mshcfg->dot11MeshRetryTimeout);
885 /* set the non-peer mode to active during peering */
886 changed |= ieee80211_mps_local_status_update(sdata);
888 spin_unlock_bh(&sta->lock);
889 mesh_plink_frame_tx(sdata,
890 WLAN_SP_MESH_PEERING_OPEN,
891 sta->sta.addr, llid, 0, 0);
892 mesh_plink_frame_tx(sdata,
893 WLAN_SP_MESH_PEERING_CONFIRM,
894 sta->sta.addr, llid, plid, 0);
897 spin_unlock_bh(&sta->lock);
902 case NL80211_PLINK_OPN_SNT:
906 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
909 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
910 sta->reason = reason;
911 sta->plink_state = NL80211_PLINK_HOLDING;
912 if (!mod_plink_timer(sta,
913 mshcfg->dot11MeshHoldingTimeout))
914 sta->ignore_plink_timer = true;
917 spin_unlock_bh(&sta->lock);
918 mesh_plink_frame_tx(sdata,
919 WLAN_SP_MESH_PEERING_CLOSE,
920 sta->sta.addr, llid, plid, reason);
923 /* retry timer is left untouched */
924 sta->plink_state = NL80211_PLINK_OPN_RCVD;
927 spin_unlock_bh(&sta->lock);
928 mesh_plink_frame_tx(sdata,
929 WLAN_SP_MESH_PEERING_CONFIRM,
930 sta->sta.addr, llid, plid, 0);
933 sta->plink_state = NL80211_PLINK_CNF_RCVD;
934 if (!mod_plink_timer(sta,
935 mshcfg->dot11MeshConfirmTimeout))
936 sta->ignore_plink_timer = true;
938 spin_unlock_bh(&sta->lock);
941 spin_unlock_bh(&sta->lock);
946 case NL80211_PLINK_OPN_RCVD:
950 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
953 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
954 sta->reason = reason;
955 sta->plink_state = NL80211_PLINK_HOLDING;
956 if (!mod_plink_timer(sta,
957 mshcfg->dot11MeshHoldingTimeout))
958 sta->ignore_plink_timer = true;
961 spin_unlock_bh(&sta->lock);
962 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
963 sta->sta.addr, llid, plid, reason);
967 spin_unlock_bh(&sta->lock);
968 mesh_plink_frame_tx(sdata,
969 WLAN_SP_MESH_PEERING_CONFIRM,
970 sta->sta.addr, llid, plid, 0);
973 del_timer(&sta->plink_timer);
974 sta->plink_state = NL80211_PLINK_ESTAB;
975 spin_unlock_bh(&sta->lock);
976 changed |= mesh_plink_inc_estab_count(sdata);
977 changed |= mesh_set_ht_prot_mode(sdata);
978 changed |= mesh_set_short_slot_time(sdata);
979 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
981 ieee80211_mps_sta_status_update(sta);
982 changed |= ieee80211_mps_set_sta_local_pm(sta,
986 spin_unlock_bh(&sta->lock);
991 case NL80211_PLINK_CNF_RCVD:
995 reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG);
998 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
999 sta->reason = reason;
1000 sta->plink_state = NL80211_PLINK_HOLDING;
1001 if (!mod_plink_timer(sta,
1002 mshcfg->dot11MeshHoldingTimeout))
1003 sta->ignore_plink_timer = true;
1006 spin_unlock_bh(&sta->lock);
1007 mesh_plink_frame_tx(sdata,
1008 WLAN_SP_MESH_PEERING_CLOSE,
1009 sta->sta.addr, llid, plid, reason);
1012 del_timer(&sta->plink_timer);
1013 sta->plink_state = NL80211_PLINK_ESTAB;
1014 spin_unlock_bh(&sta->lock);
1015 changed |= mesh_plink_inc_estab_count(sdata);
1016 changed |= mesh_set_ht_prot_mode(sdata);
1017 changed |= mesh_set_short_slot_time(sdata);
1018 mpl_dbg(sdata, "Mesh plink with %pM ESTABLISHED\n",
1020 mesh_plink_frame_tx(sdata,
1021 WLAN_SP_MESH_PEERING_CONFIRM,
1022 sta->sta.addr, llid, plid, 0);
1023 ieee80211_mps_sta_status_update(sta);
1024 changed |= ieee80211_mps_set_sta_local_pm(sta,
1025 mshcfg->power_mode);
1028 spin_unlock_bh(&sta->lock);
1033 case NL80211_PLINK_ESTAB:
1036 reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE);
1037 sta->reason = reason;
1038 changed |= __mesh_plink_deactivate(sta);
1039 sta->plink_state = NL80211_PLINK_HOLDING;
1041 mod_plink_timer(sta, mshcfg->dot11MeshHoldingTimeout);
1042 spin_unlock_bh(&sta->lock);
1043 changed |= mesh_set_ht_prot_mode(sdata);
1044 changed |= mesh_set_short_slot_time(sdata);
1045 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1046 sta->sta.addr, llid, plid, reason);
1050 spin_unlock_bh(&sta->lock);
1051 mesh_plink_frame_tx(sdata,
1052 WLAN_SP_MESH_PEERING_CONFIRM,
1053 sta->sta.addr, llid, plid, 0);
1056 spin_unlock_bh(&sta->lock);
1060 case NL80211_PLINK_HOLDING:
1063 if (del_timer(&sta->plink_timer))
1064 sta->ignore_plink_timer = 1;
1065 mesh_plink_fsm_restart(sta);
1066 spin_unlock_bh(&sta->lock);
1073 reason = sta->reason;
1074 spin_unlock_bh(&sta->lock);
1075 mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE,
1076 sta->sta.addr, llid, plid, reason);
1079 spin_unlock_bh(&sta->lock);
1083 /* should not get here, PLINK_BLOCKED is dealt with at the
1084 * beginning of the function
1086 spin_unlock_bh(&sta->lock);
1093 ieee80211_mbss_info_change_notify(sdata, changed);