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
);