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 int mesh_plink_frame_tx(struct ieee80211_sub_if_data
*sdata
,
41 enum ieee80211_self_protected_actioncode action
,
42 u8
*da
, __le16 llid
, __le16 plid
, __le16 reason
);
45 u32
mesh_plink_inc_estab_count(struct ieee80211_sub_if_data
*sdata
)
47 atomic_inc(&sdata
->u
.mesh
.estab_plinks
);
48 return mesh_accept_plinks_update(sdata
);
52 u32
mesh_plink_dec_estab_count(struct ieee80211_sub_if_data
*sdata
)
54 atomic_dec(&sdata
->u
.mesh
.estab_plinks
);
55 return mesh_accept_plinks_update(sdata
);
59 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
61 * @sta: mesh peer link to restart
63 * Locking: this function must be called holding sta->lock
65 static inline void mesh_plink_fsm_restart(struct sta_info
*sta
)
67 sta
->plink_state
= NL80211_PLINK_LISTEN
;
68 sta
->llid
= sta
->plid
= sta
->reason
= 0;
69 sta
->plink_retries
= 0;
73 * Allocate mesh sta entry and insert into station table
75 static struct sta_info
*mesh_plink_alloc(struct ieee80211_sub_if_data
*sdata
,
80 if (sdata
->local
->num_sta
>= MESH_MAX_PLINKS
)
83 sta
= sta_info_alloc(sdata
, hw_addr
, GFP_KERNEL
);
87 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
88 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
89 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
91 set_sta_flag(sta
, WLAN_STA_WME
);
97 * mesh_set_ht_prot_mode - set correct HT protection mode
99 * Section 9.23.3.5 of IEEE 80211-2012 describes the protection rules for HT
100 * mesh STA in a MBSS. Three HT protection modes are supported for now, non-HT
101 * mixed mode, 20MHz-protection and no-protection mode. non-HT mixed mode is
102 * selected if any non-HT peers are present in our MBSS. 20MHz-protection mode
103 * is selected if all peers in our 20/40MHz MBSS support HT and atleast one
104 * HT20 peer is present. Otherwise no-protection mode is selected.
106 static u32
mesh_set_ht_prot_mode(struct ieee80211_sub_if_data
*sdata
)
108 struct ieee80211_local
*local
= sdata
->local
;
109 struct sta_info
*sta
;
112 bool non_ht_sta
= false, ht20_sta
= false;
114 if (sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
)
118 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
119 if (sdata
!= sta
->sdata
||
120 sta
->plink_state
!= NL80211_PLINK_ESTAB
)
123 switch (sta
->ch_width
) {
124 case NL80211_CHAN_WIDTH_20_NOHT
:
126 "mesh_plink %pM: nonHT sta (%pM) is present\n",
127 sdata
->vif
.addr
, sta
->sta
.addr
);
130 case NL80211_CHAN_WIDTH_20
:
132 "mesh_plink %pM: HT20 sta (%pM) is present\n",
133 sdata
->vif
.addr
, sta
->sta
.addr
);
143 ht_opmode
= IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED
;
145 sdata
->vif
.bss_conf
.chandef
.width
> NL80211_CHAN_WIDTH_20
)
146 ht_opmode
= IEEE80211_HT_OP_MODE_PROTECTION_20MHZ
;
148 ht_opmode
= IEEE80211_HT_OP_MODE_PROTECTION_NONE
;
150 if (sdata
->vif
.bss_conf
.ht_operation_mode
!= ht_opmode
) {
151 sdata
->vif
.bss_conf
.ht_operation_mode
= ht_opmode
;
152 sdata
->u
.mesh
.mshcfg
.ht_opmode
= ht_opmode
;
153 changed
= BSS_CHANGED_HT
;
155 "mesh_plink %pM: protection mode changed to %d\n",
156 sdata
->vif
.addr
, ht_opmode
);
163 * __mesh_plink_deactivate - deactivate mesh peer link
165 * @sta: mesh peer link to deactivate
167 * All mesh paths with this peer as next hop will be flushed
168 * Returns beacon changed flag if the beacon content changed.
170 * Locking: the caller must hold sta->lock
172 static u32
__mesh_plink_deactivate(struct sta_info
*sta
)
174 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
177 if (sta
->plink_state
== NL80211_PLINK_ESTAB
)
178 changed
= mesh_plink_dec_estab_count(sdata
);
179 sta
->plink_state
= NL80211_PLINK_BLOCKED
;
180 mesh_path_flush_by_nexthop(sta
);
186 * mesh_plink_deactivate - deactivate mesh peer link
188 * @sta: mesh peer link to deactivate
190 * All mesh paths with this peer as next hop will be flushed
192 void mesh_plink_deactivate(struct sta_info
*sta
)
194 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
197 spin_lock_bh(&sta
->lock
);
198 changed
= __mesh_plink_deactivate(sta
);
199 sta
->reason
= cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED
);
200 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
201 sta
->sta
.addr
, sta
->llid
, sta
->plid
,
203 spin_unlock_bh(&sta
->lock
);
205 ieee80211_bss_info_change_notify(sdata
, changed
);
208 static int mesh_plink_frame_tx(struct ieee80211_sub_if_data
*sdata
,
209 enum ieee80211_self_protected_actioncode action
,
210 u8
*da
, __le16 llid
, __le16 plid
, __le16 reason
) {
211 struct ieee80211_local
*local
= sdata
->local
;
213 struct ieee80211_tx_info
*info
;
214 struct ieee80211_mgmt
*mgmt
;
215 bool include_plid
= false;
216 u16 peering_proto
= 0;
218 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.action
.u
.self_prot
) +
219 sizeof(mgmt
->u
.action
.u
.self_prot
);
222 skb
= dev_alloc_skb(local
->tx_headroom
+
224 2 + /* capability info */
226 2 + 8 + /* supported rates */
227 2 + (IEEE80211_MAX_SUPP_RATES
- 8) +
228 2 + sdata
->u
.mesh
.mesh_id_len
+
229 2 + sizeof(struct ieee80211_meshconf_ie
) +
230 2 + sizeof(struct ieee80211_ht_cap
) +
231 2 + sizeof(struct ieee80211_ht_operation
) +
232 2 + 8 + /* peering IE */
233 sdata
->u
.mesh
.ie_len
);
236 info
= IEEE80211_SKB_CB(skb
);
237 skb_reserve(skb
, local
->tx_headroom
);
238 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, hdr_len
);
239 memset(mgmt
, 0, hdr_len
);
240 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
241 IEEE80211_STYPE_ACTION
);
242 memcpy(mgmt
->da
, da
, ETH_ALEN
);
243 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
244 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
245 mgmt
->u
.action
.category
= WLAN_CATEGORY_SELF_PROTECTED
;
246 mgmt
->u
.action
.u
.self_prot
.action_code
= action
;
248 if (action
!= WLAN_SP_MESH_PEERING_CLOSE
) {
249 enum ieee80211_band band
= ieee80211_get_sdata_band(sdata
);
251 /* capability info */
252 pos
= skb_put(skb
, 2);
254 if (action
== WLAN_SP_MESH_PEERING_CONFIRM
) {
256 pos
= skb_put(skb
, 2);
257 memcpy(pos
+ 2, &plid
, 2);
259 if (ieee80211_add_srates_ie(sdata
, skb
, true, band
) ||
260 ieee80211_add_ext_srates_ie(sdata
, skb
, true, band
) ||
261 mesh_add_rsn_ie(skb
, sdata
) ||
262 mesh_add_meshid_ie(skb
, sdata
) ||
263 mesh_add_meshconf_ie(skb
, sdata
))
265 } else { /* WLAN_SP_MESH_PEERING_CLOSE */
266 info
->flags
|= IEEE80211_TX_CTL_NO_ACK
;
267 if (mesh_add_meshid_ie(skb
, sdata
))
271 /* Add Mesh Peering Management element */
273 case WLAN_SP_MESH_PEERING_OPEN
:
275 case WLAN_SP_MESH_PEERING_CONFIRM
:
279 case WLAN_SP_MESH_PEERING_CLOSE
:
284 ie_len
+= 2; /* reason code */
291 if (WARN_ON(skb_tailroom(skb
) < 2 + ie_len
))
294 pos
= skb_put(skb
, 2 + ie_len
);
295 *pos
++ = WLAN_EID_PEER_MGMT
;
297 memcpy(pos
, &peering_proto
, 2);
299 memcpy(pos
, &llid
, 2);
302 memcpy(pos
, &plid
, 2);
305 if (action
== WLAN_SP_MESH_PEERING_CLOSE
) {
306 memcpy(pos
, &reason
, 2);
310 if (action
!= WLAN_SP_MESH_PEERING_CLOSE
) {
311 if (mesh_add_ht_cap_ie(skb
, sdata
) ||
312 mesh_add_ht_oper_ie(skb
, sdata
))
316 if (mesh_add_vendor_ies(skb
, sdata
))
319 ieee80211_tx_skb(sdata
, skb
);
327 * mesh_peer_init - initialize new mesh peer and return resulting sta_info
329 * @sdata: local meshif
330 * @addr: peer's address
331 * @elems: IEs from beacon or mesh peering frame
335 static struct sta_info
*mesh_peer_init(struct ieee80211_sub_if_data
*sdata
,
337 struct ieee802_11_elems
*elems
)
339 struct ieee80211_local
*local
= sdata
->local
;
340 enum ieee80211_band band
= ieee80211_get_sdata_band(sdata
);
341 struct ieee80211_supported_band
*sband
;
342 u32 rates
, basic_rates
= 0;
343 struct sta_info
*sta
;
346 sband
= local
->hw
.wiphy
->bands
[band
];
347 rates
= ieee80211_sta_get_rates(local
, elems
, band
, &basic_rates
);
349 sta
= sta_info_get(sdata
, addr
);
351 /* Userspace handles peer allocation when security is enabled */
352 if (sdata
->u
.mesh
.security
& IEEE80211_MESH_SEC_AUTHED
) {
353 cfg80211_notify_new_peer_candidate(sdata
->dev
, addr
,
360 sta
= mesh_plink_alloc(sdata
, addr
);
366 spin_lock_bh(&sta
->lock
);
367 sta
->last_rx
= jiffies
;
368 if (sta
->plink_state
== NL80211_PLINK_ESTAB
) {
369 spin_unlock_bh(&sta
->lock
);
373 sta
->sta
.supp_rates
[band
] = rates
;
374 if (elems
->ht_cap_elem
&&
375 sdata
->vif
.bss_conf
.chandef
.width
!= NL80211_CHAN_WIDTH_20_NOHT
)
376 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata
, sband
,
380 memset(&sta
->sta
.ht_cap
, 0, sizeof(sta
->sta
.ht_cap
));
382 if (elems
->ht_operation
) {
383 struct cfg80211_chan_def chandef
;
385 if (!(elems
->ht_operation
->ht_param
&
386 IEEE80211_HT_PARAM_CHAN_WIDTH_ANY
))
387 sta
->sta
.ht_cap
.cap
&=
388 ~IEEE80211_HT_CAP_SUP_WIDTH_20_40
;
389 ieee80211_ht_oper_to_chandef(sdata
->vif
.bss_conf
.chandef
.chan
,
390 elems
->ht_operation
, &chandef
);
391 sta
->ch_width
= chandef
.width
;
395 rate_control_rate_init(sta
);
396 spin_unlock_bh(&sta
->lock
);
398 if (insert
&& sta_info_insert(sta
))
404 void mesh_neighbour_update(struct ieee80211_sub_if_data
*sdata
,
406 struct ieee802_11_elems
*elems
)
408 struct sta_info
*sta
;
411 sta
= mesh_peer_init(sdata
, hw_addr
, elems
);
415 if (mesh_peer_accepts_plinks(elems
) &&
416 sta
->plink_state
== NL80211_PLINK_LISTEN
&&
417 sdata
->u
.mesh
.accepting_plinks
&&
418 sdata
->u
.mesh
.mshcfg
.auto_open_plinks
&&
419 rssi_threshold_check(sta
, sdata
))
420 mesh_plink_open(sta
);
426 static void mesh_plink_timer(unsigned long data
)
428 struct sta_info
*sta
;
429 __le16 llid
, plid
, reason
;
430 struct ieee80211_sub_if_data
*sdata
;
431 struct mesh_config
*mshcfg
;
434 * This STA is valid because sta_info_destroy() will
435 * del_timer_sync() this timer after having made sure
436 * it cannot be readded (by deleting the plink.)
438 sta
= (struct sta_info
*) data
;
440 if (sta
->sdata
->local
->quiescing
) {
441 sta
->plink_timer_was_running
= true;
445 spin_lock_bh(&sta
->lock
);
446 if (sta
->ignore_plink_timer
) {
447 sta
->ignore_plink_timer
= false;
448 spin_unlock_bh(&sta
->lock
);
452 "Mesh plink timer for %pM fired on state %d\n",
453 sta
->sta
.addr
, sta
->plink_state
);
458 mshcfg
= &sdata
->u
.mesh
.mshcfg
;
460 switch (sta
->plink_state
) {
461 case NL80211_PLINK_OPN_RCVD
:
462 case NL80211_PLINK_OPN_SNT
:
464 if (sta
->plink_retries
< mshcfg
->dot11MeshMaxRetries
) {
467 "Mesh plink for %pM (retry, timeout): %d %d\n",
468 sta
->sta
.addr
, sta
->plink_retries
,
470 get_random_bytes(&rand
, sizeof(u32
));
471 sta
->plink_timeout
= sta
->plink_timeout
+
472 rand
% sta
->plink_timeout
;
473 ++sta
->plink_retries
;
474 mod_plink_timer(sta
, sta
->plink_timeout
);
475 spin_unlock_bh(&sta
->lock
);
476 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_OPEN
,
477 sta
->sta
.addr
, llid
, 0, 0);
480 reason
= cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES
);
481 /* fall through on else */
482 case NL80211_PLINK_CNF_RCVD
:
485 reason
= cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT
);
486 sta
->plink_state
= NL80211_PLINK_HOLDING
;
487 mod_plink_timer(sta
, mshcfg
->dot11MeshHoldingTimeout
);
488 spin_unlock_bh(&sta
->lock
);
489 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
490 sta
->sta
.addr
, llid
, plid
, reason
);
492 case NL80211_PLINK_HOLDING
:
494 del_timer(&sta
->plink_timer
);
495 mesh_plink_fsm_restart(sta
);
496 spin_unlock_bh(&sta
->lock
);
499 spin_unlock_bh(&sta
->lock
);
505 void mesh_plink_quiesce(struct sta_info
*sta
)
507 if (del_timer_sync(&sta
->plink_timer
))
508 sta
->plink_timer_was_running
= true;
511 void mesh_plink_restart(struct sta_info
*sta
)
513 if (sta
->plink_timer_was_running
) {
514 add_timer(&sta
->plink_timer
);
515 sta
->plink_timer_was_running
= false;
520 static inline void mesh_plink_timer_set(struct sta_info
*sta
, int timeout
)
522 sta
->plink_timer
.expires
= jiffies
+ (HZ
* timeout
/ 1000);
523 sta
->plink_timer
.data
= (unsigned long) sta
;
524 sta
->plink_timer
.function
= mesh_plink_timer
;
525 sta
->plink_timeout
= timeout
;
526 add_timer(&sta
->plink_timer
);
529 int mesh_plink_open(struct sta_info
*sta
)
532 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
534 if (!test_sta_flag(sta
, WLAN_STA_AUTH
))
537 spin_lock_bh(&sta
->lock
);
538 get_random_bytes(&llid
, 2);
540 if (sta
->plink_state
!= NL80211_PLINK_LISTEN
&&
541 sta
->plink_state
!= NL80211_PLINK_BLOCKED
) {
542 spin_unlock_bh(&sta
->lock
);
545 sta
->plink_state
= NL80211_PLINK_OPN_SNT
;
546 mesh_plink_timer_set(sta
, sdata
->u
.mesh
.mshcfg
.dot11MeshRetryTimeout
);
547 spin_unlock_bh(&sta
->lock
);
549 "Mesh plink: starting establishment with %pM\n",
552 return mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_OPEN
,
553 sta
->sta
.addr
, llid
, 0, 0);
556 void mesh_plink_block(struct sta_info
*sta
)
558 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
561 spin_lock_bh(&sta
->lock
);
562 changed
= __mesh_plink_deactivate(sta
);
563 sta
->plink_state
= NL80211_PLINK_BLOCKED
;
564 spin_unlock_bh(&sta
->lock
);
566 ieee80211_bss_info_change_notify(sdata
, changed
);
570 void mesh_rx_plink_frame(struct ieee80211_sub_if_data
*sdata
, struct ieee80211_mgmt
*mgmt
,
571 size_t len
, struct ieee80211_rx_status
*rx_status
)
573 struct mesh_config
*mshcfg
= &sdata
->u
.mesh
.mshcfg
;
574 struct ieee802_11_elems elems
;
575 struct sta_info
*sta
;
576 enum plink_event event
;
577 enum ieee80211_self_protected_actioncode ftype
;
579 bool matches_local
= true;
583 __le16 plid
, llid
, reason
;
584 static const char *mplstates
[] = {
585 [NL80211_PLINK_LISTEN
] = "LISTEN",
586 [NL80211_PLINK_OPN_SNT
] = "OPN-SNT",
587 [NL80211_PLINK_OPN_RCVD
] = "OPN-RCVD",
588 [NL80211_PLINK_CNF_RCVD
] = "CNF_RCVD",
589 [NL80211_PLINK_ESTAB
] = "ESTAB",
590 [NL80211_PLINK_HOLDING
] = "HOLDING",
591 [NL80211_PLINK_BLOCKED
] = "BLOCKED"
594 /* need action_code, aux */
595 if (len
< IEEE80211_MIN_ACTION_SIZE
+ 3)
598 if (is_multicast_ether_addr(mgmt
->da
)) {
600 "Mesh plink: ignore frame from multicast address\n");
604 baseaddr
= mgmt
->u
.action
.u
.self_prot
.variable
;
605 baselen
= (u8
*) mgmt
->u
.action
.u
.self_prot
.variable
- (u8
*) mgmt
;
606 if (mgmt
->u
.action
.u
.self_prot
.action_code
==
607 WLAN_SP_MESH_PEERING_CONFIRM
) {
611 ieee802_11_parse_elems(baseaddr
, len
- baselen
, &elems
);
612 if (!elems
.peering
) {
614 "Mesh plink: missing necessary peer link ie\n");
618 sdata
->u
.mesh
.security
== IEEE80211_MESH_SEC_NONE
) {
620 "Mesh plink: can't establish link with secure peer\n");
624 ftype
= mgmt
->u
.action
.u
.self_prot
.action_code
;
625 ie_len
= elems
.peering_len
;
626 if ((ftype
== WLAN_SP_MESH_PEERING_OPEN
&& ie_len
!= 4) ||
627 (ftype
== WLAN_SP_MESH_PEERING_CONFIRM
&& ie_len
!= 6) ||
628 (ftype
== WLAN_SP_MESH_PEERING_CLOSE
&& ie_len
!= 6
631 "Mesh plink: incorrect plink ie length %d %d\n",
636 if (ftype
!= WLAN_SP_MESH_PEERING_CLOSE
&&
637 (!elems
.mesh_id
|| !elems
.mesh_config
)) {
638 mpl_dbg(sdata
, "Mesh plink: missing necessary ie\n");
641 /* Note the lines below are correct, the llid in the frame is the plid
642 * from the point of view of this host.
644 memcpy(&plid
, PLINK_GET_LLID(elems
.peering
), 2);
645 if (ftype
== WLAN_SP_MESH_PEERING_CONFIRM
||
646 (ftype
== WLAN_SP_MESH_PEERING_CLOSE
&& ie_len
== 8))
647 memcpy(&llid
, PLINK_GET_PLID(elems
.peering
), 2);
651 sta
= sta_info_get(sdata
, mgmt
->sa
);
652 if (!sta
&& ftype
!= WLAN_SP_MESH_PEERING_OPEN
) {
653 mpl_dbg(sdata
, "Mesh plink: cls or cnf from unknown peer\n");
658 if (ftype
== WLAN_SP_MESH_PEERING_OPEN
&&
659 !rssi_threshold_check(sta
, sdata
)) {
660 mpl_dbg(sdata
, "Mesh plink: %pM does not meet rssi threshold\n",
666 if (sta
&& !test_sta_flag(sta
, WLAN_STA_AUTH
)) {
667 mpl_dbg(sdata
, "Mesh plink: Action frame from non-authed peer\n");
672 if (sta
&& sta
->plink_state
== NL80211_PLINK_BLOCKED
) {
677 /* Now we will figure out the appropriate event... */
678 event
= PLINK_UNDEFINED
;
679 if (ftype
!= WLAN_SP_MESH_PEERING_CLOSE
&&
680 !mesh_matches_local(sdata
, &elems
)) {
681 matches_local
= false;
683 case WLAN_SP_MESH_PEERING_OPEN
:
686 case WLAN_SP_MESH_PEERING_CONFIRM
:
694 if (!sta
&& !matches_local
) {
696 reason
= cpu_to_le16(WLAN_REASON_MESH_CONFIG
);
698 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
699 mgmt
->sa
, llid
, plid
, reason
);
702 /* ftype == WLAN_SP_MESH_PEERING_OPEN */
703 if (!mesh_plink_free_count(sdata
)) {
704 mpl_dbg(sdata
, "Mesh plink error: no more free plinks\n");
709 } else if (matches_local
) {
711 case WLAN_SP_MESH_PEERING_OPEN
:
712 if (!mesh_plink_free_count(sdata
) ||
713 (sta
->plid
&& sta
->plid
!= plid
))
718 case WLAN_SP_MESH_PEERING_CONFIRM
:
719 if (!mesh_plink_free_count(sdata
) ||
720 (sta
->llid
!= llid
|| sta
->plid
!= plid
))
725 case WLAN_SP_MESH_PEERING_CLOSE
:
726 if (sta
->plink_state
== NL80211_PLINK_ESTAB
)
727 /* Do not check for llid or plid. This does not
728 * follow the standard but since multiple plinks
729 * per sta are not supported, it is necessary in
730 * order to avoid a livelock when MP A sees an
731 * establish peer link to MP B but MP B does not
732 * see it. This can be caused by a timeout in
733 * B's peer link establishment or B beign
737 else if (sta
->plid
!= plid
)
739 else if (ie_len
== 7 && sta
->llid
!= llid
)
745 mpl_dbg(sdata
, "Mesh plink: unknown frame subtype\n");
751 if (event
== OPN_ACPT
) {
752 /* allocate sta entry if necessary and update info */
753 sta
= mesh_peer_init(sdata
, mgmt
->sa
, &elems
);
755 mpl_dbg(sdata
, "Mesh plink: failed to init peer!\n");
762 "Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
763 mgmt
->sa
, mplstates
[sta
->plink_state
],
764 le16_to_cpu(sta
->llid
), le16_to_cpu(sta
->plid
),
767 spin_lock_bh(&sta
->lock
);
768 switch (sta
->plink_state
) {
769 /* spin_unlock as soon as state is updated at each case */
770 case NL80211_PLINK_LISTEN
:
773 mesh_plink_fsm_restart(sta
);
774 spin_unlock_bh(&sta
->lock
);
777 sta
->plink_state
= NL80211_PLINK_OPN_RCVD
;
779 get_random_bytes(&llid
, 2);
781 mesh_plink_timer_set(sta
,
782 mshcfg
->dot11MeshRetryTimeout
);
783 spin_unlock_bh(&sta
->lock
);
784 mesh_plink_frame_tx(sdata
,
785 WLAN_SP_MESH_PEERING_OPEN
,
786 sta
->sta
.addr
, llid
, 0, 0);
787 mesh_plink_frame_tx(sdata
,
788 WLAN_SP_MESH_PEERING_CONFIRM
,
789 sta
->sta
.addr
, llid
, plid
, 0);
792 spin_unlock_bh(&sta
->lock
);
797 case NL80211_PLINK_OPN_SNT
:
801 reason
= cpu_to_le16(WLAN_REASON_MESH_CONFIG
);
804 reason
= cpu_to_le16(WLAN_REASON_MESH_CLOSE
);
805 sta
->reason
= reason
;
806 sta
->plink_state
= NL80211_PLINK_HOLDING
;
807 if (!mod_plink_timer(sta
,
808 mshcfg
->dot11MeshHoldingTimeout
))
809 sta
->ignore_plink_timer
= true;
812 spin_unlock_bh(&sta
->lock
);
813 mesh_plink_frame_tx(sdata
,
814 WLAN_SP_MESH_PEERING_CLOSE
,
815 sta
->sta
.addr
, llid
, plid
, reason
);
818 /* retry timer is left untouched */
819 sta
->plink_state
= NL80211_PLINK_OPN_RCVD
;
822 spin_unlock_bh(&sta
->lock
);
823 mesh_plink_frame_tx(sdata
,
824 WLAN_SP_MESH_PEERING_CONFIRM
,
825 sta
->sta
.addr
, llid
, plid
, 0);
828 sta
->plink_state
= NL80211_PLINK_CNF_RCVD
;
829 if (!mod_plink_timer(sta
,
830 mshcfg
->dot11MeshConfirmTimeout
))
831 sta
->ignore_plink_timer
= true;
833 spin_unlock_bh(&sta
->lock
);
836 spin_unlock_bh(&sta
->lock
);
841 case NL80211_PLINK_OPN_RCVD
:
845 reason
= cpu_to_le16(WLAN_REASON_MESH_CONFIG
);
848 reason
= cpu_to_le16(WLAN_REASON_MESH_CLOSE
);
849 sta
->reason
= reason
;
850 sta
->plink_state
= NL80211_PLINK_HOLDING
;
851 if (!mod_plink_timer(sta
,
852 mshcfg
->dot11MeshHoldingTimeout
))
853 sta
->ignore_plink_timer
= true;
856 spin_unlock_bh(&sta
->lock
);
857 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
858 sta
->sta
.addr
, llid
, plid
, reason
);
862 spin_unlock_bh(&sta
->lock
);
863 mesh_plink_frame_tx(sdata
,
864 WLAN_SP_MESH_PEERING_CONFIRM
,
865 sta
->sta
.addr
, llid
, plid
, 0);
868 del_timer(&sta
->plink_timer
);
869 sta
->plink_state
= NL80211_PLINK_ESTAB
;
870 spin_unlock_bh(&sta
->lock
);
871 changed
|= mesh_plink_inc_estab_count(sdata
);
872 changed
|= mesh_set_ht_prot_mode(sdata
);
873 mpl_dbg(sdata
, "Mesh plink with %pM ESTABLISHED\n",
877 spin_unlock_bh(&sta
->lock
);
882 case NL80211_PLINK_CNF_RCVD
:
886 reason
= cpu_to_le16(WLAN_REASON_MESH_CONFIG
);
889 reason
= cpu_to_le16(WLAN_REASON_MESH_CLOSE
);
890 sta
->reason
= reason
;
891 sta
->plink_state
= NL80211_PLINK_HOLDING
;
892 if (!mod_plink_timer(sta
,
893 mshcfg
->dot11MeshHoldingTimeout
))
894 sta
->ignore_plink_timer
= true;
897 spin_unlock_bh(&sta
->lock
);
898 mesh_plink_frame_tx(sdata
,
899 WLAN_SP_MESH_PEERING_CLOSE
,
900 sta
->sta
.addr
, llid
, plid
, reason
);
903 del_timer(&sta
->plink_timer
);
904 sta
->plink_state
= NL80211_PLINK_ESTAB
;
905 spin_unlock_bh(&sta
->lock
);
906 changed
|= mesh_plink_inc_estab_count(sdata
);
907 changed
|= mesh_set_ht_prot_mode(sdata
);
908 mpl_dbg(sdata
, "Mesh plink with %pM ESTABLISHED\n",
910 mesh_plink_frame_tx(sdata
,
911 WLAN_SP_MESH_PEERING_CONFIRM
,
912 sta
->sta
.addr
, llid
, plid
, 0);
915 spin_unlock_bh(&sta
->lock
);
920 case NL80211_PLINK_ESTAB
:
923 reason
= cpu_to_le16(WLAN_REASON_MESH_CLOSE
);
924 sta
->reason
= reason
;
925 changed
|= __mesh_plink_deactivate(sta
);
926 sta
->plink_state
= NL80211_PLINK_HOLDING
;
928 mod_plink_timer(sta
, mshcfg
->dot11MeshHoldingTimeout
);
929 spin_unlock_bh(&sta
->lock
);
930 changed
|= mesh_set_ht_prot_mode(sdata
);
931 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
932 sta
->sta
.addr
, llid
, plid
, reason
);
936 spin_unlock_bh(&sta
->lock
);
937 mesh_plink_frame_tx(sdata
,
938 WLAN_SP_MESH_PEERING_CONFIRM
,
939 sta
->sta
.addr
, llid
, plid
, 0);
942 spin_unlock_bh(&sta
->lock
);
946 case NL80211_PLINK_HOLDING
:
949 if (del_timer(&sta
->plink_timer
))
950 sta
->ignore_plink_timer
= 1;
951 mesh_plink_fsm_restart(sta
);
952 spin_unlock_bh(&sta
->lock
);
959 reason
= sta
->reason
;
960 spin_unlock_bh(&sta
->lock
);
961 mesh_plink_frame_tx(sdata
, WLAN_SP_MESH_PEERING_CLOSE
,
962 sta
->sta
.addr
, llid
, plid
, reason
);
965 spin_unlock_bh(&sta
->lock
);
969 /* should not get here, PLINK_BLOCKED is dealt with at the
970 * beginning of the function
972 spin_unlock_bh(&sta
->lock
);
979 ieee80211_bss_info_change_notify(sdata
, changed
);