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"
15 #include "driver-ops.h"
17 static int mesh_allocated
;
18 static struct kmem_cache
*rm_cache
;
20 bool mesh_action_is_path_sel(struct ieee80211_mgmt
*mgmt
)
22 return (mgmt
->u
.action
.u
.mesh_action
.action_code
==
23 WLAN_MESH_ACTION_HWMP_PATH_SELECTION
);
26 void ieee80211s_init(void)
29 rm_cache
= kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry
),
33 void ieee80211s_stop(void)
37 kmem_cache_destroy(rm_cache
);
40 static void ieee80211_mesh_housekeeping_timer(unsigned long data
)
42 struct ieee80211_sub_if_data
*sdata
= (void *) data
;
43 struct ieee80211_local
*local
= sdata
->local
;
44 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
46 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
48 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
52 * mesh_matches_local - check if the config of a mesh point matches ours
54 * @sdata: local mesh subif
55 * @ie: information elements of a management frame from the mesh peer
57 * This function checks if the mesh configuration of a mesh point matches the
58 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
60 bool mesh_matches_local(struct ieee80211_sub_if_data
*sdata
,
61 struct ieee802_11_elems
*ie
)
63 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
65 struct cfg80211_chan_def sta_chan_def
;
68 * As support for each feature is added, check for matching
69 * - On mesh config capabilities
70 * - Power Save Support En
71 * - Sync support enabled
72 * - Sync support active
73 * - Sync support required from peer
75 * - Power management control on fc
77 if (!(ifmsh
->mesh_id_len
== ie
->mesh_id_len
&&
78 memcmp(ifmsh
->mesh_id
, ie
->mesh_id
, ie
->mesh_id_len
) == 0 &&
79 (ifmsh
->mesh_pp_id
== ie
->mesh_config
->meshconf_psel
) &&
80 (ifmsh
->mesh_pm_id
== ie
->mesh_config
->meshconf_pmetric
) &&
81 (ifmsh
->mesh_cc_id
== ie
->mesh_config
->meshconf_congest
) &&
82 (ifmsh
->mesh_sp_id
== ie
->mesh_config
->meshconf_synch
) &&
83 (ifmsh
->mesh_auth_id
== ie
->mesh_config
->meshconf_auth
)))
86 ieee80211_sta_get_rates(sdata
, ie
, ieee80211_get_sdata_band(sdata
),
89 if (sdata
->vif
.bss_conf
.basic_rates
!= basic_rates
)
92 cfg80211_chandef_create(&sta_chan_def
, sdata
->vif
.bss_conf
.chandef
.chan
,
94 ieee80211_chandef_ht_oper(ie
->ht_operation
, &sta_chan_def
);
95 ieee80211_chandef_vht_oper(ie
->vht_operation
, &sta_chan_def
);
97 if (!cfg80211_chandef_compatible(&sdata
->vif
.bss_conf
.chandef
,
105 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
107 * @ie: information elements of a management frame from the mesh peer
109 bool mesh_peer_accepts_plinks(struct ieee802_11_elems
*ie
)
111 return (ie
->mesh_config
->meshconf_cap
&
112 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS
) != 0;
116 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
118 * @sdata: mesh interface in which mesh beacons are going to be updated
120 * Returns: beacon changed flag if the beacon content changed.
122 u32
mesh_accept_plinks_update(struct ieee80211_sub_if_data
*sdata
)
127 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
128 * the mesh interface might be able to establish plinks with peers that
129 * are already on the table but are not on PLINK_ESTAB state. However,
130 * in general the mesh interface is not accepting peer link requests
131 * from new peers, and that must be reflected in the beacon
133 free_plinks
= mesh_plink_availables(sdata
);
135 if (free_plinks
!= sdata
->u
.mesh
.accepting_plinks
) {
136 sdata
->u
.mesh
.accepting_plinks
= free_plinks
;
137 changed
= BSS_CHANGED_BEACON
;
144 * mesh_sta_cleanup - clean up any mesh sta state
146 * @sta: mesh sta to clean up.
148 void mesh_sta_cleanup(struct sta_info
*sta
)
150 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
154 * maybe userspace handles peer allocation and peering, but in either
155 * case the beacon is still generated by the kernel and we might need
158 changed
= mesh_accept_plinks_update(sdata
);
159 if (!sdata
->u
.mesh
.user_mpm
) {
160 changed
|= mesh_plink_deactivate(sta
);
161 del_timer_sync(&sta
->mesh
->plink_timer
);
164 /* make sure no readers can access nexthop sta from here on */
165 mesh_path_flush_by_nexthop(sta
);
169 ieee80211_mbss_info_change_notify(sdata
, changed
);
172 int mesh_rmc_init(struct ieee80211_sub_if_data
*sdata
)
176 sdata
->u
.mesh
.rmc
= kmalloc(sizeof(struct mesh_rmc
), GFP_KERNEL
);
177 if (!sdata
->u
.mesh
.rmc
)
179 sdata
->u
.mesh
.rmc
->idx_mask
= RMC_BUCKETS
- 1;
180 for (i
= 0; i
< RMC_BUCKETS
; i
++)
181 INIT_HLIST_HEAD(&sdata
->u
.mesh
.rmc
->bucket
[i
]);
185 void mesh_rmc_free(struct ieee80211_sub_if_data
*sdata
)
187 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
189 struct hlist_node
*n
;
192 if (!sdata
->u
.mesh
.rmc
)
195 for (i
= 0; i
< RMC_BUCKETS
; i
++) {
196 hlist_for_each_entry_safe(p
, n
, &rmc
->bucket
[i
], list
) {
198 kmem_cache_free(rm_cache
, p
);
203 sdata
->u
.mesh
.rmc
= NULL
;
207 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
210 * @sa: source address
211 * @mesh_hdr: mesh_header
213 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
215 * Checks using the source address and the mesh sequence number if we have
216 * received this frame lately. If the frame is not in the cache, it is added to
219 int mesh_rmc_check(struct ieee80211_sub_if_data
*sdata
,
220 const u8
*sa
, struct ieee80211s_hdr
*mesh_hdr
)
222 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
227 struct hlist_node
*n
;
232 /* Don't care about endianness since only match matters */
233 memcpy(&seqnum
, &mesh_hdr
->seqnum
, sizeof(mesh_hdr
->seqnum
));
234 idx
= le32_to_cpu(mesh_hdr
->seqnum
) & rmc
->idx_mask
;
235 hlist_for_each_entry_safe(p
, n
, &rmc
->bucket
[idx
], list
) {
237 if (time_after(jiffies
, p
->exp_time
) ||
238 entries
== RMC_QUEUE_MAX_LEN
) {
240 kmem_cache_free(rm_cache
, p
);
242 } else if ((seqnum
== p
->seqnum
) && ether_addr_equal(sa
, p
->sa
))
246 p
= kmem_cache_alloc(rm_cache
, GFP_ATOMIC
);
251 p
->exp_time
= jiffies
+ RMC_TIMEOUT
;
252 memcpy(p
->sa
, sa
, ETH_ALEN
);
253 hlist_add_head(&p
->list
, &rmc
->bucket
[idx
]);
257 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data
*sdata
,
260 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
262 u8 meshconf_len
= sizeof(struct ieee80211_meshconf_ie
);
264 if (skb_tailroom(skb
) < 2 + meshconf_len
)
267 pos
= skb_put(skb
, 2 + meshconf_len
);
268 *pos
++ = WLAN_EID_MESH_CONFIG
;
269 *pos
++ = meshconf_len
;
271 /* save a pointer for quick updates in pre-tbtt */
272 ifmsh
->meshconf_offset
= pos
- skb
->data
;
274 /* Active path selection protocol ID */
275 *pos
++ = ifmsh
->mesh_pp_id
;
276 /* Active path selection metric ID */
277 *pos
++ = ifmsh
->mesh_pm_id
;
278 /* Congestion control mode identifier */
279 *pos
++ = ifmsh
->mesh_cc_id
;
280 /* Synchronization protocol identifier */
281 *pos
++ = ifmsh
->mesh_sp_id
;
282 /* Authentication Protocol identifier */
283 *pos
++ = ifmsh
->mesh_auth_id
;
284 /* Mesh Formation Info - number of neighbors */
285 neighbors
= atomic_read(&ifmsh
->estab_plinks
);
286 neighbors
= min_t(int, neighbors
, IEEE80211_MAX_MESH_PEERINGS
);
287 *pos
++ = neighbors
<< 1;
288 /* Mesh capability */
290 *pos
|= ifmsh
->mshcfg
.dot11MeshForwarding
?
291 IEEE80211_MESHCONF_CAPAB_FORWARDING
: 0x00;
292 *pos
|= ifmsh
->accepting_plinks
?
293 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS
: 0x00;
294 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
295 *pos
|= ifmsh
->ps_peers_deep_sleep
?
296 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL
: 0x00;
297 *pos
++ |= ifmsh
->adjusting_tbtt
?
298 IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING
: 0x00;
304 int mesh_add_meshid_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
306 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
309 if (skb_tailroom(skb
) < 2 + ifmsh
->mesh_id_len
)
312 pos
= skb_put(skb
, 2 + ifmsh
->mesh_id_len
);
313 *pos
++ = WLAN_EID_MESH_ID
;
314 *pos
++ = ifmsh
->mesh_id_len
;
315 if (ifmsh
->mesh_id_len
)
316 memcpy(pos
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
);
321 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data
*sdata
,
324 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
327 /* see IEEE802.11-2012 13.14.6 */
328 if (ifmsh
->ps_peers_light_sleep
== 0 &&
329 ifmsh
->ps_peers_deep_sleep
== 0 &&
330 ifmsh
->nonpeer_pm
== NL80211_MESH_POWER_ACTIVE
)
333 if (skb_tailroom(skb
) < 4)
336 pos
= skb_put(skb
, 2 + 2);
337 *pos
++ = WLAN_EID_MESH_AWAKE_WINDOW
;
339 put_unaligned_le16(ifmsh
->mshcfg
.dot11MeshAwakeWindowDuration
, pos
);
344 int mesh_add_vendor_ies(struct ieee80211_sub_if_data
*sdata
,
347 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
351 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
354 /* fast-forward to vendor IEs */
355 offset
= ieee80211_ie_split_vendor(ifmsh
->ie
, ifmsh
->ie_len
, 0);
358 len
= ifmsh
->ie_len
- offset
;
359 data
= ifmsh
->ie
+ offset
;
360 if (skb_tailroom(skb
) < len
)
362 memcpy(skb_put(skb
, len
), data
, len
);
368 int mesh_add_rsn_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
370 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
374 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
378 data
= cfg80211_find_ie(WLAN_EID_RSN
, ifmsh
->ie
, ifmsh
->ie_len
);
384 if (skb_tailroom(skb
) < len
)
386 memcpy(skb_put(skb
, len
), data
, len
);
391 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data
*sdata
,
394 struct ieee80211_chanctx_conf
*chanctx_conf
;
395 struct ieee80211_channel
*chan
;
398 if (skb_tailroom(skb
) < 3)
402 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
403 if (WARN_ON(!chanctx_conf
)) {
407 chan
= chanctx_conf
->def
.chan
;
410 pos
= skb_put(skb
, 2 + 1);
411 *pos
++ = WLAN_EID_DS_PARAMS
;
413 *pos
++ = ieee80211_frequency_to_channel(chan
->center_freq
);
418 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
421 struct ieee80211_local
*local
= sdata
->local
;
422 enum nl80211_band band
= ieee80211_get_sdata_band(sdata
);
423 struct ieee80211_supported_band
*sband
;
426 sband
= local
->hw
.wiphy
->bands
[band
];
427 if (!sband
->ht_cap
.ht_supported
||
428 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
429 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
430 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
433 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_cap
))
436 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_cap
));
437 ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
, sband
->ht_cap
.cap
);
442 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data
*sdata
,
445 struct ieee80211_local
*local
= sdata
->local
;
446 struct ieee80211_chanctx_conf
*chanctx_conf
;
447 struct ieee80211_channel
*channel
;
448 struct ieee80211_supported_band
*sband
;
449 struct ieee80211_sta_ht_cap
*ht_cap
;
453 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
454 if (WARN_ON(!chanctx_conf
)) {
458 channel
= chanctx_conf
->def
.chan
;
461 sband
= local
->hw
.wiphy
->bands
[channel
->band
];
462 ht_cap
= &sband
->ht_cap
;
464 if (!ht_cap
->ht_supported
||
465 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
466 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
467 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
470 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_operation
))
473 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_operation
));
474 ieee80211_ie_build_ht_oper(pos
, ht_cap
, &sdata
->vif
.bss_conf
.chandef
,
475 sdata
->vif
.bss_conf
.ht_operation_mode
,
481 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
484 struct ieee80211_local
*local
= sdata
->local
;
485 enum nl80211_band band
= ieee80211_get_sdata_band(sdata
);
486 struct ieee80211_supported_band
*sband
;
489 sband
= local
->hw
.wiphy
->bands
[band
];
490 if (!sband
->vht_cap
.vht_supported
||
491 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
492 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
493 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
496 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_vht_cap
))
499 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_vht_cap
));
500 ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
, sband
->vht_cap
.cap
);
505 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data
*sdata
,
508 struct ieee80211_local
*local
= sdata
->local
;
509 struct ieee80211_chanctx_conf
*chanctx_conf
;
510 struct ieee80211_channel
*channel
;
511 struct ieee80211_supported_band
*sband
;
512 struct ieee80211_sta_vht_cap
*vht_cap
;
516 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
517 if (WARN_ON(!chanctx_conf
)) {
521 channel
= chanctx_conf
->def
.chan
;
524 sband
= local
->hw
.wiphy
->bands
[channel
->band
];
525 vht_cap
= &sband
->vht_cap
;
527 if (!vht_cap
->vht_supported
||
528 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
529 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
530 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
533 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_vht_operation
))
536 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_vht_operation
));
537 ieee80211_ie_build_vht_oper(pos
, vht_cap
,
538 &sdata
->vif
.bss_conf
.chandef
);
543 static void ieee80211_mesh_path_timer(unsigned long data
)
545 struct ieee80211_sub_if_data
*sdata
=
546 (struct ieee80211_sub_if_data
*) data
;
548 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
551 static void ieee80211_mesh_path_root_timer(unsigned long data
)
553 struct ieee80211_sub_if_data
*sdata
=
554 (struct ieee80211_sub_if_data
*) data
;
555 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
557 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
559 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
562 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh
*ifmsh
)
564 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
> IEEE80211_ROOTMODE_ROOT
)
565 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
567 clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
568 /* stop running timer */
569 del_timer_sync(&ifmsh
->mesh_path_root_timer
);
574 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
575 * @hdr: 802.11 frame header
576 * @fc: frame control field
577 * @meshda: destination address in the mesh
578 * @meshsa: source address address in the mesh. Same as TA, as frame is
579 * locally originated.
581 * Return the length of the 802.11 (does not include a mesh control header)
583 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr
*hdr
, __le16
*fc
,
584 const u8
*meshda
, const u8
*meshsa
)
586 if (is_multicast_ether_addr(meshda
)) {
587 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
589 memcpy(hdr
->addr1
, meshda
, ETH_ALEN
);
590 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
591 memcpy(hdr
->addr3
, meshsa
, ETH_ALEN
);
594 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
596 eth_zero_addr(hdr
->addr1
); /* RA is resolved later */
597 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
598 memcpy(hdr
->addr3
, meshda
, ETH_ALEN
);
599 memcpy(hdr
->addr4
, meshsa
, ETH_ALEN
);
605 * ieee80211_new_mesh_header - create a new mesh header
606 * @sdata: mesh interface to be used
607 * @meshhdr: uninitialized mesh header
608 * @addr4or5: 1st address in the ae header, which may correspond to address 4
609 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
611 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
614 * Return the header length.
616 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data
*sdata
,
617 struct ieee80211s_hdr
*meshhdr
,
618 const char *addr4or5
, const char *addr6
)
620 if (WARN_ON(!addr4or5
&& addr6
))
623 memset(meshhdr
, 0, sizeof(*meshhdr
));
625 meshhdr
->ttl
= sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
;
627 /* FIXME: racy -- TX on multiple queues can be concurrent */
628 put_unaligned(cpu_to_le32(sdata
->u
.mesh
.mesh_seqnum
), &meshhdr
->seqnum
);
629 sdata
->u
.mesh
.mesh_seqnum
++;
631 if (addr4or5
&& !addr6
) {
632 meshhdr
->flags
|= MESH_FLAGS_AE_A4
;
633 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
635 } else if (addr4or5
&& addr6
) {
636 meshhdr
->flags
|= MESH_FLAGS_AE_A5_A6
;
637 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
638 memcpy(meshhdr
->eaddr2
, addr6
, ETH_ALEN
);
645 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data
*sdata
)
647 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
650 if (ifmsh
->mshcfg
.plink_timeout
> 0)
651 ieee80211_sta_expire(sdata
, ifmsh
->mshcfg
.plink_timeout
* HZ
);
652 mesh_path_expire(sdata
);
654 changed
= mesh_accept_plinks_update(sdata
);
655 ieee80211_mbss_info_change_notify(sdata
, changed
);
657 mod_timer(&ifmsh
->housekeeping_timer
,
658 round_jiffies(jiffies
+
659 IEEE80211_MESH_HOUSEKEEPING_INTERVAL
));
662 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data
*sdata
)
664 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
667 mesh_path_tx_root_frame(sdata
);
669 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
== IEEE80211_PROACTIVE_RANN
)
670 interval
= ifmsh
->mshcfg
.dot11MeshHWMPRannInterval
;
672 interval
= ifmsh
->mshcfg
.dot11MeshHWMProotInterval
;
674 mod_timer(&ifmsh
->mesh_path_root_timer
,
675 round_jiffies(TU_TO_EXP_TIME(interval
)));
679 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh
*ifmsh
)
681 struct beacon_data
*bcn
;
682 int head_len
, tail_len
;
684 struct ieee80211_mgmt
*mgmt
;
685 struct ieee80211_chanctx_conf
*chanctx_conf
;
686 struct mesh_csa_settings
*csa
;
687 enum nl80211_band band
;
689 struct ieee80211_sub_if_data
*sdata
;
690 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.beacon
) +
691 sizeof(mgmt
->u
.beacon
);
693 sdata
= container_of(ifmsh
, struct ieee80211_sub_if_data
, u
.mesh
);
695 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
696 band
= chanctx_conf
->def
.chan
->band
;
701 /* Channel Switch Announcement */
702 2 + sizeof(struct ieee80211_channel_sw_ie
) +
703 /* Mesh Channel Swith Parameters */
704 2 + sizeof(struct ieee80211_mesh_chansw_params_ie
) +
705 2 + 8 + /* supported rates */
706 2 + 3; /* DS params */
707 tail_len
= 2 + (IEEE80211_MAX_SUPP_RATES
- 8) +
708 2 + sizeof(struct ieee80211_ht_cap
) +
709 2 + sizeof(struct ieee80211_ht_operation
) +
710 2 + ifmsh
->mesh_id_len
+
711 2 + sizeof(struct ieee80211_meshconf_ie
) +
712 2 + sizeof(__le16
) + /* awake window */
713 2 + sizeof(struct ieee80211_vht_cap
) +
714 2 + sizeof(struct ieee80211_vht_operation
) +
717 bcn
= kzalloc(sizeof(*bcn
) + head_len
+ tail_len
, GFP_KERNEL
);
718 /* need an skb for IE builders to operate on */
719 skb
= dev_alloc_skb(max(head_len
, tail_len
));
725 * pointers go into the block we allocated,
726 * memory is | beacon_data | head | tail |
728 bcn
->head
= ((u8
*) bcn
) + sizeof(*bcn
);
730 /* fill in the head */
731 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, hdr_len
);
732 memset(mgmt
, 0, hdr_len
);
733 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
734 IEEE80211_STYPE_BEACON
);
735 eth_broadcast_addr(mgmt
->da
);
736 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
737 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
738 ieee80211_mps_set_frame_flags(sdata
, NULL
, (void *) mgmt
);
739 mgmt
->u
.beacon
.beacon_int
=
740 cpu_to_le16(sdata
->vif
.bss_conf
.beacon_int
);
741 mgmt
->u
.beacon
.capab_info
|= cpu_to_le16(
742 sdata
->u
.mesh
.security
? WLAN_CAPABILITY_PRIVACY
: 0);
744 pos
= skb_put(skb
, 2);
745 *pos
++ = WLAN_EID_SSID
;
749 csa
= rcu_dereference(ifmsh
->csa
);
751 pos
= skb_put(skb
, 13);
753 *pos
++ = WLAN_EID_CHANNEL_SWITCH
;
756 *pos
++ = ieee80211_frequency_to_channel(
757 csa
->settings
.chandef
.chan
->center_freq
);
758 bcn
->csa_current_counter
= csa
->settings
.count
;
759 bcn
->csa_counter_offsets
[0] = hdr_len
+ 6;
760 *pos
++ = csa
->settings
.count
;
761 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
;
763 if (ifmsh
->csa_role
== IEEE80211_MESH_CSA_ROLE_INIT
) {
764 *pos
++ = ifmsh
->mshcfg
.dot11MeshTTL
;
765 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
767 *pos
++ = ifmsh
->chsw_ttl
;
769 *pos
++ |= csa
->settings
.block_tx
?
770 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
771 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
);
773 put_unaligned_le16(ifmsh
->pre_value
, pos
);
778 if (ieee80211_add_srates_ie(sdata
, skb
, true, band
) ||
779 mesh_add_ds_params_ie(sdata
, skb
))
782 bcn
->head_len
= skb
->len
;
783 memcpy(bcn
->head
, skb
->data
, bcn
->head_len
);
787 bcn
->tail
= bcn
->head
+ bcn
->head_len
;
789 if (ieee80211_add_ext_srates_ie(sdata
, skb
, true, band
) ||
790 mesh_add_rsn_ie(sdata
, skb
) ||
791 mesh_add_ht_cap_ie(sdata
, skb
) ||
792 mesh_add_ht_oper_ie(sdata
, skb
) ||
793 mesh_add_meshid_ie(sdata
, skb
) ||
794 mesh_add_meshconf_ie(sdata
, skb
) ||
795 mesh_add_awake_window_ie(sdata
, skb
) ||
796 mesh_add_vht_cap_ie(sdata
, skb
) ||
797 mesh_add_vht_oper_ie(sdata
, skb
) ||
798 mesh_add_vendor_ies(sdata
, skb
))
801 bcn
->tail_len
= skb
->len
;
802 memcpy(bcn
->tail
, skb
->data
, bcn
->tail_len
);
803 bcn
->meshconf
= (struct ieee80211_meshconf_ie
*)
804 (bcn
->tail
+ ifmsh
->meshconf_offset
);
807 rcu_assign_pointer(ifmsh
->beacon
, bcn
);
816 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data
*sdata
)
818 struct beacon_data
*old_bcn
;
821 old_bcn
= rcu_dereference_protected(sdata
->u
.mesh
.beacon
,
822 lockdep_is_held(&sdata
->wdev
.mtx
));
823 ret
= ieee80211_mesh_build_beacon(&sdata
->u
.mesh
);
825 /* just reuse old beacon */
829 kfree_rcu(old_bcn
, rcu_head
);
833 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
836 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
837 unsigned long bits
= changed
;
843 /* if we race with running work, worst case this work becomes a noop */
844 for_each_set_bit(bit
, &bits
, sizeof(changed
) * BITS_PER_BYTE
)
845 set_bit(bit
, &ifmsh
->mbss_changed
);
846 set_bit(MESH_WORK_MBSS_CHANGED
, &ifmsh
->wrkq_flags
);
847 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
850 int ieee80211_start_mesh(struct ieee80211_sub_if_data
*sdata
)
852 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
853 struct ieee80211_local
*local
= sdata
->local
;
854 u32 changed
= BSS_CHANGED_BEACON
|
855 BSS_CHANGED_BEACON_ENABLED
|
857 BSS_CHANGED_BASIC_RATES
|
858 BSS_CHANGED_BEACON_INT
;
860 local
->fif_other_bss
++;
861 /* mesh ifaces must set allmulti to forward mcast traffic */
862 atomic_inc(&local
->iff_allmultis
);
863 ieee80211_configure_filter(local
);
865 ifmsh
->mesh_cc_id
= 0; /* Disabled */
866 /* register sync ops from extensible synchronization framework */
867 ifmsh
->sync_ops
= ieee80211_mesh_sync_ops_get(ifmsh
->mesh_sp_id
);
868 ifmsh
->adjusting_tbtt
= false;
869 ifmsh
->sync_offset_clockdrift_max
= 0;
870 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
871 ieee80211_mesh_root_setup(ifmsh
);
872 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
873 sdata
->vif
.bss_conf
.ht_operation_mode
=
874 ifmsh
->mshcfg
.ht_opmode
;
875 sdata
->vif
.bss_conf
.enable_beacon
= true;
877 changed
|= ieee80211_mps_local_status_update(sdata
);
879 if (ieee80211_mesh_build_beacon(ifmsh
)) {
880 ieee80211_stop_mesh(sdata
);
884 ieee80211_recalc_dtim(local
, sdata
);
885 ieee80211_bss_info_change_notify(sdata
, changed
);
887 netif_carrier_on(sdata
->dev
);
891 void ieee80211_stop_mesh(struct ieee80211_sub_if_data
*sdata
)
893 struct ieee80211_local
*local
= sdata
->local
;
894 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
895 struct beacon_data
*bcn
;
897 netif_carrier_off(sdata
->dev
);
899 /* stop the beacon */
900 ifmsh
->mesh_id_len
= 0;
901 sdata
->vif
.bss_conf
.enable_beacon
= false;
902 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED
, &sdata
->state
);
903 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BEACON_ENABLED
);
904 bcn
= rcu_dereference_protected(ifmsh
->beacon
,
905 lockdep_is_held(&sdata
->wdev
.mtx
));
906 RCU_INIT_POINTER(ifmsh
->beacon
, NULL
);
907 kfree_rcu(bcn
, rcu_head
);
909 /* flush STAs and mpaths on this iface */
910 sta_info_flush(sdata
);
911 mesh_path_flush_by_iface(sdata
);
913 /* free all potentially still buffered group-addressed frames */
914 local
->total_ps_buffered
-= skb_queue_len(&ifmsh
->ps
.bc_buf
);
915 skb_queue_purge(&ifmsh
->ps
.bc_buf
);
917 del_timer_sync(&sdata
->u
.mesh
.housekeeping_timer
);
918 del_timer_sync(&sdata
->u
.mesh
.mesh_path_root_timer
);
919 del_timer_sync(&sdata
->u
.mesh
.mesh_path_timer
);
921 /* clear any mesh work (for next join) we may have accrued */
922 ifmsh
->wrkq_flags
= 0;
923 ifmsh
->mbss_changed
= 0;
925 local
->fif_other_bss
--;
926 atomic_dec(&local
->iff_allmultis
);
927 ieee80211_configure_filter(local
);
931 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data
*sdata
,
932 struct ieee802_11_elems
*elems
, bool beacon
)
934 struct cfg80211_csa_settings params
;
935 struct ieee80211_csa_ie csa_ie
;
936 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
937 enum nl80211_band band
= ieee80211_get_sdata_band(sdata
);
941 sdata_assert_lock(sdata
);
943 sta_flags
= IEEE80211_STA_DISABLE_VHT
;
944 switch (sdata
->vif
.bss_conf
.chandef
.width
) {
945 case NL80211_CHAN_WIDTH_20_NOHT
:
946 sta_flags
|= IEEE80211_STA_DISABLE_HT
;
947 case NL80211_CHAN_WIDTH_20
:
948 sta_flags
|= IEEE80211_STA_DISABLE_40MHZ
;
954 memset(¶ms
, 0, sizeof(params
));
955 memset(&csa_ie
, 0, sizeof(csa_ie
));
956 err
= ieee80211_parse_ch_switch_ie(sdata
, elems
, band
,
957 sta_flags
, sdata
->vif
.addr
,
964 params
.chandef
= csa_ie
.chandef
;
965 params
.count
= csa_ie
.count
;
967 if (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, ¶ms
.chandef
,
968 IEEE80211_CHAN_DISABLED
)) {
970 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
972 params
.chandef
.chan
->center_freq
,
973 params
.chandef
.width
,
974 params
.chandef
.center_freq1
,
975 params
.chandef
.center_freq2
);
979 err
= cfg80211_chandef_dfs_required(sdata
->local
->hw
.wiphy
,
981 NL80211_IFTYPE_MESH_POINT
);
985 /* TODO: DFS not (yet) supported */
988 params
.radar_required
= err
;
990 if (cfg80211_chandef_identical(¶ms
.chandef
,
991 &sdata
->vif
.bss_conf
.chandef
)) {
993 "received csa with an identical chandef, ignoring\n");
998 "received channel switch announcement to go to channel %d MHz\n",
999 params
.chandef
.chan
->center_freq
);
1001 params
.block_tx
= csa_ie
.mode
& WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
;
1003 ifmsh
->chsw_ttl
= csa_ie
.ttl
- 1;
1004 if (ifmsh
->pre_value
>= csa_ie
.pre_value
)
1006 ifmsh
->pre_value
= csa_ie
.pre_value
;
1009 if (ifmsh
->chsw_ttl
>= ifmsh
->mshcfg
.dot11MeshTTL
)
1012 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_REPEATER
;
1014 if (ieee80211_channel_switch(sdata
->local
->hw
.wiphy
, sdata
->dev
,
1022 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data
*sdata
,
1023 struct ieee80211_mgmt
*mgmt
, size_t len
)
1025 struct ieee80211_local
*local
= sdata
->local
;
1026 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1027 struct sk_buff
*presp
;
1028 struct beacon_data
*bcn
;
1029 struct ieee80211_mgmt
*hdr
;
1030 struct ieee802_11_elems elems
;
1034 pos
= mgmt
->u
.probe_req
.variable
;
1035 baselen
= (u8
*) pos
- (u8
*) mgmt
;
1039 ieee802_11_parse_elems(pos
, len
- baselen
, false, &elems
);
1044 /* 802.11-2012 10.1.4.3.2 */
1045 if ((!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
) &&
1046 !is_broadcast_ether_addr(mgmt
->da
)) ||
1047 elems
.ssid_len
!= 0)
1050 if (elems
.mesh_id_len
!= 0 &&
1051 (elems
.mesh_id_len
!= ifmsh
->mesh_id_len
||
1052 memcmp(elems
.mesh_id
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
)))
1056 bcn
= rcu_dereference(ifmsh
->beacon
);
1061 presp
= dev_alloc_skb(local
->tx_headroom
+
1062 bcn
->head_len
+ bcn
->tail_len
);
1066 skb_reserve(presp
, local
->tx_headroom
);
1067 memcpy(skb_put(presp
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
1068 memcpy(skb_put(presp
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
1069 hdr
= (struct ieee80211_mgmt
*) presp
->data
;
1070 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1071 IEEE80211_STYPE_PROBE_RESP
);
1072 memcpy(hdr
->da
, mgmt
->sa
, ETH_ALEN
);
1073 IEEE80211_SKB_CB(presp
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1074 ieee80211_tx_skb(sdata
, presp
);
1079 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data
*sdata
,
1081 struct ieee80211_mgmt
*mgmt
,
1083 struct ieee80211_rx_status
*rx_status
)
1085 struct ieee80211_local
*local
= sdata
->local
;
1086 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1087 struct ieee802_11_elems elems
;
1088 struct ieee80211_channel
*channel
;
1091 enum nl80211_band band
= rx_status
->band
;
1093 /* ignore ProbeResp to foreign address */
1094 if (stype
== IEEE80211_STYPE_PROBE_RESP
&&
1095 !ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
1098 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1102 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
1105 /* ignore non-mesh or secure / unsecure mismatch */
1106 if ((!elems
.mesh_id
|| !elems
.mesh_config
) ||
1107 (elems
.rsn
&& sdata
->u
.mesh
.security
== IEEE80211_MESH_SEC_NONE
) ||
1108 (!elems
.rsn
&& sdata
->u
.mesh
.security
!= IEEE80211_MESH_SEC_NONE
))
1111 if (elems
.ds_params
)
1112 freq
= ieee80211_channel_to_frequency(elems
.ds_params
[0], band
);
1114 freq
= rx_status
->freq
;
1116 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1118 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1121 if (mesh_matches_local(sdata
, &elems
))
1122 mesh_neighbour_update(sdata
, mgmt
->sa
, &elems
);
1124 if (ifmsh
->sync_ops
)
1125 ifmsh
->sync_ops
->rx_bcn_presp(sdata
,
1126 stype
, mgmt
, &elems
, rx_status
);
1128 if (ifmsh
->csa_role
!= IEEE80211_MESH_CSA_ROLE_INIT
&&
1129 !sdata
->vif
.csa_active
)
1130 ieee80211_mesh_process_chnswitch(sdata
, &elems
, true);
1133 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data
*sdata
)
1135 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1136 struct mesh_csa_settings
*tmp_csa_settings
;
1140 /* Reset the TTL value and Initiator flag */
1141 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_NONE
;
1142 ifmsh
->chsw_ttl
= 0;
1144 /* Remove the CSA and MCSP elements from the beacon */
1145 tmp_csa_settings
= rcu_dereference(ifmsh
->csa
);
1146 RCU_INIT_POINTER(ifmsh
->csa
, NULL
);
1147 if (tmp_csa_settings
)
1148 kfree_rcu(tmp_csa_settings
, rcu_head
);
1149 ret
= ieee80211_mesh_rebuild_beacon(sdata
);
1153 changed
|= BSS_CHANGED_BEACON
;
1155 mcsa_dbg(sdata
, "complete switching to center freq %d MHz",
1156 sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
);
1160 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data
*sdata
,
1161 struct cfg80211_csa_settings
*csa_settings
)
1163 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1164 struct mesh_csa_settings
*tmp_csa_settings
;
1167 tmp_csa_settings
= kmalloc(sizeof(*tmp_csa_settings
),
1169 if (!tmp_csa_settings
)
1172 memcpy(&tmp_csa_settings
->settings
, csa_settings
,
1173 sizeof(struct cfg80211_csa_settings
));
1175 rcu_assign_pointer(ifmsh
->csa
, tmp_csa_settings
);
1177 ret
= ieee80211_mesh_rebuild_beacon(sdata
);
1179 tmp_csa_settings
= rcu_dereference(ifmsh
->csa
);
1180 RCU_INIT_POINTER(ifmsh
->csa
, NULL
);
1181 kfree_rcu(tmp_csa_settings
, rcu_head
);
1185 return BSS_CHANGED_BEACON
;
1188 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data
*sdata
,
1189 struct ieee80211_mgmt
*mgmt
, size_t len
)
1191 struct ieee80211_mgmt
*mgmt_fwd
;
1192 struct sk_buff
*skb
;
1193 struct ieee80211_local
*local
= sdata
->local
;
1194 u8
*pos
= mgmt
->u
.action
.u
.chan_switch
.variable
;
1197 skb
= dev_alloc_skb(local
->tx_headroom
+ len
);
1200 skb_reserve(skb
, local
->tx_headroom
);
1201 mgmt_fwd
= (struct ieee80211_mgmt
*) skb_put(skb
, len
);
1203 /* offset_ttl is based on whether the secondary channel
1204 * offset is available or not. Subtract 1 from the mesh TTL
1205 * and disable the initiator flag before forwarding.
1207 offset_ttl
= (len
< 42) ? 7 : 10;
1208 *(pos
+ offset_ttl
) -= 1;
1209 *(pos
+ offset_ttl
+ 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
1211 memcpy(mgmt_fwd
, mgmt
, len
);
1212 eth_broadcast_addr(mgmt_fwd
->da
);
1213 memcpy(mgmt_fwd
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1214 memcpy(mgmt_fwd
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
1216 ieee80211_tx_skb(sdata
, skb
);
1220 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data
*sdata
,
1221 struct ieee80211_mgmt
*mgmt
, size_t len
)
1223 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1224 struct ieee802_11_elems elems
;
1226 bool fwd_csa
= true;
1230 if (mgmt
->u
.action
.u
.measurement
.action_code
!=
1231 WLAN_ACTION_SPCT_CHL_SWITCH
)
1234 pos
= mgmt
->u
.action
.u
.chan_switch
.variable
;
1235 baselen
= offsetof(struct ieee80211_mgmt
,
1236 u
.action
.u
.chan_switch
.variable
);
1237 ieee802_11_parse_elems(pos
, len
- baselen
, false, &elems
);
1239 ifmsh
->chsw_ttl
= elems
.mesh_chansw_params_ie
->mesh_ttl
;
1240 if (!--ifmsh
->chsw_ttl
)
1243 pre_value
= le16_to_cpu(elems
.mesh_chansw_params_ie
->mesh_pre_value
);
1244 if (ifmsh
->pre_value
>= pre_value
)
1247 ifmsh
->pre_value
= pre_value
;
1249 if (!sdata
->vif
.csa_active
&&
1250 !ieee80211_mesh_process_chnswitch(sdata
, &elems
, false)) {
1251 mcsa_dbg(sdata
, "Failed to process CSA action frame");
1255 /* forward or re-broadcast the CSA frame */
1257 if (mesh_fwd_csa_frame(sdata
, mgmt
, len
) < 0)
1258 mcsa_dbg(sdata
, "Failed to forward the CSA frame");
1262 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data
*sdata
,
1263 struct ieee80211_mgmt
*mgmt
,
1265 struct ieee80211_rx_status
*rx_status
)
1267 switch (mgmt
->u
.action
.category
) {
1268 case WLAN_CATEGORY_SELF_PROTECTED
:
1269 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
1270 case WLAN_SP_MESH_PEERING_OPEN
:
1271 case WLAN_SP_MESH_PEERING_CLOSE
:
1272 case WLAN_SP_MESH_PEERING_CONFIRM
:
1273 mesh_rx_plink_frame(sdata
, mgmt
, len
, rx_status
);
1277 case WLAN_CATEGORY_MESH_ACTION
:
1278 if (mesh_action_is_path_sel(mgmt
))
1279 mesh_rx_path_sel_frame(sdata
, mgmt
, len
);
1281 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1282 mesh_rx_csa_frame(sdata
, mgmt
, len
);
1287 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1288 struct sk_buff
*skb
)
1290 struct ieee80211_rx_status
*rx_status
;
1291 struct ieee80211_mgmt
*mgmt
;
1296 /* mesh already went down */
1297 if (!sdata
->u
.mesh
.mesh_id_len
)
1300 rx_status
= IEEE80211_SKB_RXCB(skb
);
1301 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1302 stype
= le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_STYPE
;
1305 case IEEE80211_STYPE_PROBE_RESP
:
1306 case IEEE80211_STYPE_BEACON
:
1307 ieee80211_mesh_rx_bcn_presp(sdata
, stype
, mgmt
, skb
->len
,
1310 case IEEE80211_STYPE_PROBE_REQ
:
1311 ieee80211_mesh_rx_probe_req(sdata
, mgmt
, skb
->len
);
1313 case IEEE80211_STYPE_ACTION
:
1314 ieee80211_mesh_rx_mgmt_action(sdata
, mgmt
, skb
->len
, rx_status
);
1318 sdata_unlock(sdata
);
1321 static void mesh_bss_info_changed(struct ieee80211_sub_if_data
*sdata
)
1323 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1324 u32 bit
, changed
= 0;
1326 for_each_set_bit(bit
, &ifmsh
->mbss_changed
,
1327 sizeof(changed
) * BITS_PER_BYTE
) {
1328 clear_bit(bit
, &ifmsh
->mbss_changed
);
1329 changed
|= BIT(bit
);
1332 if (sdata
->vif
.bss_conf
.enable_beacon
&&
1333 (changed
& (BSS_CHANGED_BEACON
|
1335 BSS_CHANGED_BASIC_RATES
|
1336 BSS_CHANGED_BEACON_INT
)))
1337 if (ieee80211_mesh_rebuild_beacon(sdata
))
1340 ieee80211_bss_info_change_notify(sdata
, changed
);
1343 void ieee80211_mesh_work(struct ieee80211_sub_if_data
*sdata
)
1345 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1349 /* mesh already went down */
1350 if (!sdata
->u
.mesh
.mesh_id_len
)
1353 if (ifmsh
->preq_queue_len
&&
1355 ifmsh
->last_preq
+ msecs_to_jiffies(ifmsh
->mshcfg
.dot11MeshHWMPpreqMinInterval
)))
1356 mesh_path_start_discovery(sdata
);
1358 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
))
1359 ieee80211_mesh_housekeeping(sdata
);
1361 if (test_and_clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
))
1362 ieee80211_mesh_rootpath(sdata
);
1364 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST
, &ifmsh
->wrkq_flags
))
1365 mesh_sync_adjust_tbtt(sdata
);
1367 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED
, &ifmsh
->wrkq_flags
))
1368 mesh_bss_info_changed(sdata
);
1370 sdata_unlock(sdata
);
1374 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data
*sdata
)
1376 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1377 static u8 zero_addr
[ETH_ALEN
] = {};
1379 setup_timer(&ifmsh
->housekeeping_timer
,
1380 ieee80211_mesh_housekeeping_timer
,
1381 (unsigned long) sdata
);
1383 ifmsh
->accepting_plinks
= true;
1384 atomic_set(&ifmsh
->mpaths
, 0);
1385 mesh_rmc_init(sdata
);
1386 ifmsh
->last_preq
= jiffies
;
1387 ifmsh
->next_perr
= jiffies
;
1388 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_NONE
;
1389 /* Allocate all mesh structures when creating the first mesh interface. */
1390 if (!mesh_allocated
)
1393 mesh_pathtbl_init(sdata
);
1395 setup_timer(&ifmsh
->mesh_path_timer
,
1396 ieee80211_mesh_path_timer
,
1397 (unsigned long) sdata
);
1398 setup_timer(&ifmsh
->mesh_path_root_timer
,
1399 ieee80211_mesh_path_root_timer
,
1400 (unsigned long) sdata
);
1401 INIT_LIST_HEAD(&ifmsh
->preq_queue
.list
);
1402 skb_queue_head_init(&ifmsh
->ps
.bc_buf
);
1403 spin_lock_init(&ifmsh
->mesh_preq_queue_lock
);
1404 spin_lock_init(&ifmsh
->sync_offset_lock
);
1405 RCU_INIT_POINTER(ifmsh
->beacon
, NULL
);
1407 sdata
->vif
.bss_conf
.bssid
= zero_addr
;
1410 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1412 mesh_rmc_free(sdata
);
1413 mesh_pathtbl_unregister(sdata
);