2 * Copyright (c) 2008, 2009 open80211s Ltd.
3 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
4 * Javier Cardona <javier@cozybit.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/slab.h>
12 #include <asm/unaligned.h>
13 #include "ieee80211_i.h"
16 #define TMR_RUNNING_HK 0
17 #define TMR_RUNNING_MP 1
18 #define TMR_RUNNING_MPR 2
21 static struct kmem_cache
*rm_cache
;
23 #ifdef CONFIG_MAC80211_MESH
24 bool mesh_action_is_path_sel(struct ieee80211_mgmt
*mgmt
)
26 return (mgmt
->u
.action
.u
.mesh_action
.action_code
==
27 WLAN_MESH_ACTION_HWMP_PATH_SELECTION
);
30 bool mesh_action_is_path_sel(struct ieee80211_mgmt
*mgmt
)
34 void ieee80211s_init(void)
38 rm_cache
= kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry
),
42 void ieee80211s_stop(void)
44 mesh_pathtbl_unregister();
45 kmem_cache_destroy(rm_cache
);
48 static void ieee80211_mesh_housekeeping_timer(unsigned long data
)
50 struct ieee80211_sub_if_data
*sdata
= (void *) data
;
51 struct ieee80211_local
*local
= sdata
->local
;
52 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
54 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
56 if (local
->quiescing
) {
57 set_bit(TMR_RUNNING_HK
, &ifmsh
->timers_running
);
61 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
65 * mesh_matches_local - check if the config of a mesh point matches ours
67 * @sdata: local mesh subif
68 * @ie: information elements of a management frame from the mesh peer
70 * This function checks if the mesh configuration of a mesh point matches the
71 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
73 bool mesh_matches_local(struct ieee80211_sub_if_data
*sdata
,
74 struct ieee802_11_elems
*ie
)
76 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
77 struct ieee80211_local
*local
= sdata
->local
;
79 enum nl80211_channel_type sta_channel_type
= NL80211_CHAN_NO_HT
;
82 * As support for each feature is added, check for matching
83 * - On mesh config capabilities
84 * - Power Save Support En
85 * - Sync support enabled
86 * - Sync support active
87 * - Sync support required from peer
89 * - Power management control on fc
91 if (!(ifmsh
->mesh_id_len
== ie
->mesh_id_len
&&
92 memcmp(ifmsh
->mesh_id
, ie
->mesh_id
, ie
->mesh_id_len
) == 0 &&
93 (ifmsh
->mesh_pp_id
== ie
->mesh_config
->meshconf_psel
) &&
94 (ifmsh
->mesh_pm_id
== ie
->mesh_config
->meshconf_pmetric
) &&
95 (ifmsh
->mesh_cc_id
== ie
->mesh_config
->meshconf_congest
) &&
96 (ifmsh
->mesh_sp_id
== ie
->mesh_config
->meshconf_synch
) &&
97 (ifmsh
->mesh_auth_id
== ie
->mesh_config
->meshconf_auth
)))
100 ieee80211_sta_get_rates(local
, ie
, local
->oper_channel
->band
,
103 if (sdata
->vif
.bss_conf
.basic_rates
!= basic_rates
)
106 if (ie
->ht_operation
)
108 ieee80211_ht_oper_to_channel_type(ie
->ht_operation
);
110 /* Disallow HT40+/- mismatch */
111 if (ie
->ht_operation
&&
112 (sdata
->vif
.bss_conf
.channel_type
== NL80211_CHAN_HT40MINUS
||
113 sdata
->vif
.bss_conf
.channel_type
== NL80211_CHAN_HT40PLUS
) &&
114 (sta_channel_type
== NL80211_CHAN_HT40MINUS
||
115 sta_channel_type
== NL80211_CHAN_HT40PLUS
) &&
116 sdata
->vif
.bss_conf
.channel_type
!= sta_channel_type
)
125 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
127 * @ie: information elements of a management frame from the mesh peer
129 bool mesh_peer_accepts_plinks(struct ieee802_11_elems
*ie
)
131 return (ie
->mesh_config
->meshconf_cap
&
132 MESHCONF_CAPAB_ACCEPT_PLINKS
) != 0;
136 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
138 * @sdata: mesh interface in which mesh beacons are going to be updated
140 * Returns: beacon changed flag if the beacon content changed.
142 u32
mesh_accept_plinks_update(struct ieee80211_sub_if_data
*sdata
)
147 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
148 * the mesh interface might be able to establish plinks with peers that
149 * are already on the table but are not on PLINK_ESTAB state. However,
150 * in general the mesh interface is not accepting peer link requests
151 * from new peers, and that must be reflected in the beacon
153 free_plinks
= mesh_plink_availables(sdata
);
155 if (free_plinks
!= sdata
->u
.mesh
.accepting_plinks
) {
156 sdata
->u
.mesh
.accepting_plinks
= free_plinks
;
157 changed
= BSS_CHANGED_BEACON
;
163 int mesh_rmc_init(struct ieee80211_sub_if_data
*sdata
)
167 sdata
->u
.mesh
.rmc
= kmalloc(sizeof(struct mesh_rmc
), GFP_KERNEL
);
168 if (!sdata
->u
.mesh
.rmc
)
170 sdata
->u
.mesh
.rmc
->idx_mask
= RMC_BUCKETS
- 1;
171 for (i
= 0; i
< RMC_BUCKETS
; i
++)
172 INIT_LIST_HEAD(&sdata
->u
.mesh
.rmc
->bucket
[i
].list
);
176 void mesh_rmc_free(struct ieee80211_sub_if_data
*sdata
)
178 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
179 struct rmc_entry
*p
, *n
;
182 if (!sdata
->u
.mesh
.rmc
)
185 for (i
= 0; i
< RMC_BUCKETS
; i
++)
186 list_for_each_entry_safe(p
, n
, &rmc
->bucket
[i
].list
, list
) {
188 kmem_cache_free(rm_cache
, p
);
192 sdata
->u
.mesh
.rmc
= NULL
;
196 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
198 * @sa: source address
199 * @mesh_hdr: mesh_header
201 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
203 * Checks using the source address and the mesh sequence number if we have
204 * received this frame lately. If the frame is not in the cache, it is added to
207 int mesh_rmc_check(u8
*sa
, struct ieee80211s_hdr
*mesh_hdr
,
208 struct ieee80211_sub_if_data
*sdata
)
210 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
214 struct rmc_entry
*p
, *n
;
216 /* Don't care about endianness since only match matters */
217 memcpy(&seqnum
, &mesh_hdr
->seqnum
, sizeof(mesh_hdr
->seqnum
));
218 idx
= le32_to_cpu(mesh_hdr
->seqnum
) & rmc
->idx_mask
;
219 list_for_each_entry_safe(p
, n
, &rmc
->bucket
[idx
].list
, list
) {
221 if (time_after(jiffies
, p
->exp_time
) ||
222 (entries
== RMC_QUEUE_MAX_LEN
)) {
224 kmem_cache_free(rm_cache
, p
);
226 } else if ((seqnum
== p
->seqnum
) &&
227 (ether_addr_equal(sa
, p
->sa
)))
231 p
= kmem_cache_alloc(rm_cache
, GFP_ATOMIC
);
236 p
->exp_time
= jiffies
+ RMC_TIMEOUT
;
237 memcpy(p
->sa
, sa
, ETH_ALEN
);
238 list_add(&p
->list
, &rmc
->bucket
[idx
].list
);
243 mesh_add_meshconf_ie(struct sk_buff
*skb
, struct ieee80211_sub_if_data
*sdata
)
245 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
247 u8 meshconf_len
= sizeof(struct ieee80211_meshconf_ie
);
249 if (skb_tailroom(skb
) < 2 + meshconf_len
)
252 pos
= skb_put(skb
, 2 + meshconf_len
);
253 *pos
++ = WLAN_EID_MESH_CONFIG
;
254 *pos
++ = meshconf_len
;
256 /* Active path selection protocol ID */
257 *pos
++ = ifmsh
->mesh_pp_id
;
258 /* Active path selection metric ID */
259 *pos
++ = ifmsh
->mesh_pm_id
;
260 /* Congestion control mode identifier */
261 *pos
++ = ifmsh
->mesh_cc_id
;
262 /* Synchronization protocol identifier */
263 *pos
++ = ifmsh
->mesh_sp_id
;
264 /* Authentication Protocol identifier */
265 *pos
++ = ifmsh
->mesh_auth_id
;
266 /* Mesh Formation Info - number of neighbors */
267 neighbors
= atomic_read(&ifmsh
->mshstats
.estab_plinks
);
268 /* Number of neighbor mesh STAs or 15 whichever is smaller */
269 neighbors
= (neighbors
> 15) ? 15 : neighbors
;
270 *pos
++ = neighbors
<< 1;
271 /* Mesh capability */
272 *pos
= MESHCONF_CAPAB_FORWARDING
;
273 *pos
|= ifmsh
->accepting_plinks
?
274 MESHCONF_CAPAB_ACCEPT_PLINKS
: 0x00;
275 *pos
++ |= ifmsh
->adjusting_tbtt
?
276 MESHCONF_CAPAB_TBTT_ADJUSTING
: 0x00;
283 mesh_add_meshid_ie(struct sk_buff
*skb
, struct ieee80211_sub_if_data
*sdata
)
285 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
288 if (skb_tailroom(skb
) < 2 + ifmsh
->mesh_id_len
)
291 pos
= skb_put(skb
, 2 + ifmsh
->mesh_id_len
);
292 *pos
++ = WLAN_EID_MESH_ID
;
293 *pos
++ = ifmsh
->mesh_id_len
;
294 if (ifmsh
->mesh_id_len
)
295 memcpy(pos
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
);
301 mesh_add_vendor_ies(struct sk_buff
*skb
, struct ieee80211_sub_if_data
*sdata
)
303 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
307 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
310 /* fast-forward to vendor IEs */
311 offset
= ieee80211_ie_split_vendor(ifmsh
->ie
, ifmsh
->ie_len
, 0);
314 len
= ifmsh
->ie_len
- offset
;
315 data
= ifmsh
->ie
+ offset
;
316 if (skb_tailroom(skb
) < len
)
318 memcpy(skb_put(skb
, len
), data
, len
);
325 mesh_add_rsn_ie(struct sk_buff
*skb
, struct ieee80211_sub_if_data
*sdata
)
327 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
331 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
336 while (data
< ifmsh
->ie
+ ifmsh
->ie_len
) {
337 if (*data
== WLAN_EID_RSN
) {
345 if (skb_tailroom(skb
) < len
)
347 memcpy(skb_put(skb
, len
), data
, len
);
353 int mesh_add_ds_params_ie(struct sk_buff
*skb
,
354 struct ieee80211_sub_if_data
*sdata
)
356 struct ieee80211_local
*local
= sdata
->local
;
357 struct ieee80211_supported_band
*sband
;
358 struct ieee80211_channel
*chan
= local
->oper_channel
;
361 if (skb_tailroom(skb
) < 3)
364 sband
= local
->hw
.wiphy
->bands
[chan
->band
];
365 if (sband
->band
== IEEE80211_BAND_2GHZ
) {
366 pos
= skb_put(skb
, 2 + 1);
367 *pos
++ = WLAN_EID_DS_PARAMS
;
369 *pos
++ = ieee80211_frequency_to_channel(chan
->center_freq
);
375 int mesh_add_ht_cap_ie(struct sk_buff
*skb
,
376 struct ieee80211_sub_if_data
*sdata
)
378 struct ieee80211_local
*local
= sdata
->local
;
379 struct ieee80211_supported_band
*sband
;
382 sband
= local
->hw
.wiphy
->bands
[local
->oper_channel
->band
];
383 if (!sband
->ht_cap
.ht_supported
||
384 sdata
->vif
.bss_conf
.channel_type
== NL80211_CHAN_NO_HT
)
387 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_cap
))
390 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_cap
));
391 ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
, sband
->ht_cap
.cap
);
396 int mesh_add_ht_oper_ie(struct sk_buff
*skb
,
397 struct ieee80211_sub_if_data
*sdata
)
399 struct ieee80211_local
*local
= sdata
->local
;
400 struct ieee80211_channel
*channel
= local
->oper_channel
;
401 enum nl80211_channel_type channel_type
=
402 sdata
->vif
.bss_conf
.channel_type
;
403 struct ieee80211_supported_band
*sband
=
404 local
->hw
.wiphy
->bands
[channel
->band
];
405 struct ieee80211_sta_ht_cap
*ht_cap
= &sband
->ht_cap
;
408 if (!ht_cap
->ht_supported
|| channel_type
== NL80211_CHAN_NO_HT
)
411 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_operation
))
414 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_operation
));
415 ieee80211_ie_build_ht_oper(pos
, ht_cap
, channel
, channel_type
,
416 sdata
->vif
.bss_conf
.ht_operation_mode
);
420 static void ieee80211_mesh_path_timer(unsigned long data
)
422 struct ieee80211_sub_if_data
*sdata
=
423 (struct ieee80211_sub_if_data
*) data
;
424 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
425 struct ieee80211_local
*local
= sdata
->local
;
427 if (local
->quiescing
) {
428 set_bit(TMR_RUNNING_MP
, &ifmsh
->timers_running
);
432 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
435 static void ieee80211_mesh_path_root_timer(unsigned long data
)
437 struct ieee80211_sub_if_data
*sdata
=
438 (struct ieee80211_sub_if_data
*) data
;
439 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
440 struct ieee80211_local
*local
= sdata
->local
;
442 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
444 if (local
->quiescing
) {
445 set_bit(TMR_RUNNING_MPR
, &ifmsh
->timers_running
);
449 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
452 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh
*ifmsh
)
454 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
> IEEE80211_ROOTMODE_ROOT
)
455 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
457 clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
458 /* stop running timer */
459 del_timer_sync(&ifmsh
->mesh_path_root_timer
);
464 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
465 * @hdr: 802.11 frame header
466 * @fc: frame control field
467 * @meshda: destination address in the mesh
468 * @meshsa: source address address in the mesh. Same as TA, as frame is
469 * locally originated.
471 * Return the length of the 802.11 (does not include a mesh control header)
473 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr
*hdr
, __le16
*fc
,
474 const u8
*meshda
, const u8
*meshsa
)
476 if (is_multicast_ether_addr(meshda
)) {
477 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
479 memcpy(hdr
->addr1
, meshda
, ETH_ALEN
);
480 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
481 memcpy(hdr
->addr3
, meshsa
, ETH_ALEN
);
484 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
486 memset(hdr
->addr1
, 0, ETH_ALEN
); /* RA is resolved later */
487 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
488 memcpy(hdr
->addr3
, meshda
, ETH_ALEN
);
489 memcpy(hdr
->addr4
, meshsa
, ETH_ALEN
);
495 * ieee80211_new_mesh_header - create a new mesh header
496 * @meshhdr: uninitialized mesh header
497 * @sdata: mesh interface to be used
498 * @addr4or5: 1st address in the ae header, which may correspond to address 4
499 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
501 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
504 * Return the header length.
506 int ieee80211_new_mesh_header(struct ieee80211s_hdr
*meshhdr
,
507 struct ieee80211_sub_if_data
*sdata
, char *addr4or5
,
511 BUG_ON(!addr4or5
&& addr6
);
512 memset(meshhdr
, 0, sizeof(*meshhdr
));
513 meshhdr
->ttl
= sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
;
514 put_unaligned(cpu_to_le32(sdata
->u
.mesh
.mesh_seqnum
), &meshhdr
->seqnum
);
515 sdata
->u
.mesh
.mesh_seqnum
++;
516 if (addr4or5
&& !addr6
) {
517 meshhdr
->flags
|= MESH_FLAGS_AE_A4
;
519 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
520 } else if (addr4or5
&& addr6
) {
521 meshhdr
->flags
|= MESH_FLAGS_AE_A5_A6
;
522 aelen
+= 2 * ETH_ALEN
;
523 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
524 memcpy(meshhdr
->eaddr2
, addr6
, ETH_ALEN
);
529 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data
*sdata
,
530 struct ieee80211_if_mesh
*ifmsh
)
534 ieee80211_sta_expire(sdata
, IEEE80211_MESH_PEER_INACTIVITY_LIMIT
);
535 mesh_path_expire(sdata
);
537 changed
= mesh_accept_plinks_update(sdata
);
538 ieee80211_bss_info_change_notify(sdata
, changed
);
540 mod_timer(&ifmsh
->housekeeping_timer
,
541 round_jiffies(jiffies
+ IEEE80211_MESH_HOUSEKEEPING_INTERVAL
));
544 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data
*sdata
)
546 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
549 mesh_path_tx_root_frame(sdata
);
551 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
== IEEE80211_PROACTIVE_RANN
)
552 interval
= ifmsh
->mshcfg
.dot11MeshHWMPRannInterval
;
554 interval
= ifmsh
->mshcfg
.dot11MeshHWMProotInterval
;
556 mod_timer(&ifmsh
->mesh_path_root_timer
,
557 round_jiffies(TU_TO_EXP_TIME(interval
)));
561 void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data
*sdata
)
563 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
565 /* use atomic bitops in case all timers fire at the same time */
567 if (del_timer_sync(&ifmsh
->housekeeping_timer
))
568 set_bit(TMR_RUNNING_HK
, &ifmsh
->timers_running
);
569 if (del_timer_sync(&ifmsh
->mesh_path_timer
))
570 set_bit(TMR_RUNNING_MP
, &ifmsh
->timers_running
);
571 if (del_timer_sync(&ifmsh
->mesh_path_root_timer
))
572 set_bit(TMR_RUNNING_MPR
, &ifmsh
->timers_running
);
575 void ieee80211_mesh_restart(struct ieee80211_sub_if_data
*sdata
)
577 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
579 if (test_and_clear_bit(TMR_RUNNING_HK
, &ifmsh
->timers_running
))
580 add_timer(&ifmsh
->housekeeping_timer
);
581 if (test_and_clear_bit(TMR_RUNNING_MP
, &ifmsh
->timers_running
))
582 add_timer(&ifmsh
->mesh_path_timer
);
583 if (test_and_clear_bit(TMR_RUNNING_MPR
, &ifmsh
->timers_running
))
584 add_timer(&ifmsh
->mesh_path_root_timer
);
585 ieee80211_mesh_root_setup(ifmsh
);
589 void ieee80211_start_mesh(struct ieee80211_sub_if_data
*sdata
)
591 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
592 struct ieee80211_local
*local
= sdata
->local
;
594 local
->fif_other_bss
++;
595 /* mesh ifaces must set allmulti to forward mcast traffic */
596 atomic_inc(&local
->iff_allmultis
);
597 ieee80211_configure_filter(local
);
599 ifmsh
->mesh_cc_id
= 0; /* Disabled */
600 ifmsh
->mesh_auth_id
= 0; /* Disabled */
601 /* register sync ops from extensible synchronization framework */
602 ifmsh
->sync_ops
= ieee80211_mesh_sync_ops_get(ifmsh
->mesh_sp_id
);
603 ifmsh
->adjusting_tbtt
= false;
604 ifmsh
->sync_offset_clockdrift_max
= 0;
605 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
606 ieee80211_mesh_root_setup(ifmsh
);
607 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
608 sdata
->vif
.bss_conf
.ht_operation_mode
=
609 ifmsh
->mshcfg
.ht_opmode
;
610 sdata
->vif
.bss_conf
.beacon_int
= MESH_DEFAULT_BEACON_INTERVAL
;
611 sdata
->vif
.bss_conf
.basic_rates
=
612 ieee80211_mandatory_rates(sdata
->local
,
613 sdata
->local
->oper_channel
->band
);
614 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BEACON
|
615 BSS_CHANGED_BEACON_ENABLED
|
617 BSS_CHANGED_BASIC_RATES
|
618 BSS_CHANGED_BEACON_INT
);
620 netif_carrier_on(sdata
->dev
);
623 void ieee80211_stop_mesh(struct ieee80211_sub_if_data
*sdata
)
625 struct ieee80211_local
*local
= sdata
->local
;
626 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
628 netif_carrier_off(sdata
->dev
);
630 /* stop the beacon */
631 ifmsh
->mesh_id_len
= 0;
632 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BEACON_ENABLED
);
634 /* flush STAs and mpaths on this iface */
635 sta_info_flush(sdata
->local
, sdata
);
636 mesh_path_flush_by_iface(sdata
);
638 del_timer_sync(&sdata
->u
.mesh
.housekeeping_timer
);
639 del_timer_sync(&sdata
->u
.mesh
.mesh_path_root_timer
);
640 del_timer_sync(&sdata
->u
.mesh
.mesh_path_timer
);
642 * If the timer fired while we waited for it, it will have
643 * requeued the work. Now the work will be running again
644 * but will not rearm the timer again because it checks
645 * whether the interface is running, which, at this point,
648 cancel_work_sync(&sdata
->work
);
650 local
->fif_other_bss
--;
651 atomic_dec(&local
->iff_allmultis
);
652 ieee80211_configure_filter(local
);
654 sdata
->u
.mesh
.timers_running
= 0;
657 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data
*sdata
,
659 struct ieee80211_mgmt
*mgmt
,
661 struct ieee80211_rx_status
*rx_status
)
663 struct ieee80211_local
*local
= sdata
->local
;
664 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
665 struct ieee802_11_elems elems
;
666 struct ieee80211_channel
*channel
;
669 enum ieee80211_band band
= rx_status
->band
;
671 /* ignore ProbeResp to foreign address */
672 if (stype
== IEEE80211_STYPE_PROBE_RESP
&&
673 !ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
676 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
680 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
683 /* ignore beacons from secure mesh peers if our security is off */
684 if (elems
.rsn_len
&& sdata
->u
.mesh
.security
== IEEE80211_MESH_SEC_NONE
)
687 if (elems
.ds_params
&& elems
.ds_params_len
== 1)
688 freq
= ieee80211_channel_to_frequency(elems
.ds_params
[0], band
);
690 freq
= rx_status
->freq
;
692 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
694 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
697 if (elems
.mesh_id
&& elems
.mesh_config
&&
698 mesh_matches_local(sdata
, &elems
))
699 mesh_neighbour_update(sdata
, mgmt
->sa
, &elems
);
702 ifmsh
->sync_ops
->rx_bcn_presp(sdata
,
703 stype
, mgmt
, &elems
, rx_status
);
706 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data
*sdata
,
707 struct ieee80211_mgmt
*mgmt
,
709 struct ieee80211_rx_status
*rx_status
)
711 switch (mgmt
->u
.action
.category
) {
712 case WLAN_CATEGORY_SELF_PROTECTED
:
713 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
714 case WLAN_SP_MESH_PEERING_OPEN
:
715 case WLAN_SP_MESH_PEERING_CLOSE
:
716 case WLAN_SP_MESH_PEERING_CONFIRM
:
717 mesh_rx_plink_frame(sdata
, mgmt
, len
, rx_status
);
721 case WLAN_CATEGORY_MESH_ACTION
:
722 if (mesh_action_is_path_sel(mgmt
))
723 mesh_rx_path_sel_frame(sdata
, mgmt
, len
);
728 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
731 struct ieee80211_rx_status
*rx_status
;
732 struct ieee80211_mgmt
*mgmt
;
735 rx_status
= IEEE80211_SKB_RXCB(skb
);
736 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
737 stype
= le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_STYPE
;
740 case IEEE80211_STYPE_PROBE_RESP
:
741 case IEEE80211_STYPE_BEACON
:
742 ieee80211_mesh_rx_bcn_presp(sdata
, stype
, mgmt
, skb
->len
,
745 case IEEE80211_STYPE_ACTION
:
746 ieee80211_mesh_rx_mgmt_action(sdata
, mgmt
, skb
->len
, rx_status
);
751 void ieee80211_mesh_work(struct ieee80211_sub_if_data
*sdata
)
753 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
755 if (ifmsh
->preq_queue_len
&&
757 ifmsh
->last_preq
+ msecs_to_jiffies(ifmsh
->mshcfg
.dot11MeshHWMPpreqMinInterval
)))
758 mesh_path_start_discovery(sdata
);
760 if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE
, &ifmsh
->wrkq_flags
))
761 mesh_mpath_table_grow();
763 if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE
, &ifmsh
->wrkq_flags
))
764 mesh_mpp_table_grow();
766 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
))
767 ieee80211_mesh_housekeeping(sdata
, ifmsh
);
769 if (test_and_clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
))
770 ieee80211_mesh_rootpath(sdata
);
772 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST
, &ifmsh
->wrkq_flags
))
773 mesh_sync_adjust_tbtt(sdata
);
776 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local
*local
)
778 struct ieee80211_sub_if_data
*sdata
;
781 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
782 if (ieee80211_vif_is_mesh(&sdata
->vif
))
783 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
787 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data
*sdata
)
789 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
791 setup_timer(&ifmsh
->housekeeping_timer
,
792 ieee80211_mesh_housekeeping_timer
,
793 (unsigned long) sdata
);
795 ifmsh
->accepting_plinks
= true;
798 ifmsh
->num_gates
= 0;
799 atomic_set(&ifmsh
->mpaths
, 0);
800 mesh_rmc_init(sdata
);
801 ifmsh
->last_preq
= jiffies
;
802 ifmsh
->next_perr
= jiffies
;
803 /* Allocate all mesh structures when creating the first mesh interface. */
806 setup_timer(&ifmsh
->mesh_path_timer
,
807 ieee80211_mesh_path_timer
,
808 (unsigned long) sdata
);
809 setup_timer(&ifmsh
->mesh_path_root_timer
,
810 ieee80211_mesh_path_root_timer
,
811 (unsigned long) sdata
);
812 INIT_LIST_HEAD(&ifmsh
->preq_queue
.list
);
813 spin_lock_init(&ifmsh
->mesh_preq_queue_lock
);
814 spin_lock_init(&ifmsh
->sync_offset_lock
);