1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2008, 2009 open80211s Ltd.
4 * Copyright (C) 2018 - 2023 Intel Corporation
5 * Authors: Luis Carlos Cobo <luisca@cozybit.com>
6 * Javier Cardona <javier@cozybit.com>
9 #include <linux/slab.h>
10 #include <asm/unaligned.h>
11 #include "ieee80211_i.h"
14 #include "driver-ops.h"
16 static int mesh_allocated
;
17 static struct kmem_cache
*rm_cache
;
19 bool mesh_action_is_path_sel(struct ieee80211_mgmt
*mgmt
)
21 return (mgmt
->u
.action
.u
.mesh_action
.action_code
==
22 WLAN_MESH_ACTION_HWMP_PATH_SELECTION
);
25 void ieee80211s_init(void)
28 rm_cache
= kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry
),
32 void ieee80211s_stop(void)
36 kmem_cache_destroy(rm_cache
);
39 static void ieee80211_mesh_housekeeping_timer(struct timer_list
*t
)
41 struct ieee80211_sub_if_data
*sdata
=
42 from_timer(sdata
, t
, u
.mesh
.housekeeping_timer
);
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 wiphy_work_queue(local
->hw
.wiphy
, &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 * Returns: %true if both nodes belong to the same mesh
62 bool mesh_matches_local(struct ieee80211_sub_if_data
*sdata
,
63 struct ieee802_11_elems
*ie
)
65 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
67 struct cfg80211_chan_def sta_chan_def
;
68 struct ieee80211_supported_band
*sband
;
72 * As support for each feature is added, check for matching
73 * - On mesh config capabilities
74 * - Power Save Support En
75 * - Sync support enabled
76 * - Sync support active
77 * - Sync support required from peer
79 * - Power management control on fc
81 if (!(ifmsh
->mesh_id_len
== ie
->mesh_id_len
&&
82 memcmp(ifmsh
->mesh_id
, ie
->mesh_id
, ie
->mesh_id_len
) == 0 &&
83 (ifmsh
->mesh_pp_id
== ie
->mesh_config
->meshconf_psel
) &&
84 (ifmsh
->mesh_pm_id
== ie
->mesh_config
->meshconf_pmetric
) &&
85 (ifmsh
->mesh_cc_id
== ie
->mesh_config
->meshconf_congest
) &&
86 (ifmsh
->mesh_sp_id
== ie
->mesh_config
->meshconf_synch
) &&
87 (ifmsh
->mesh_auth_id
== ie
->mesh_config
->meshconf_auth
)))
90 sband
= ieee80211_get_sband(sdata
);
94 ieee80211_sta_get_rates(sdata
, ie
, sband
->band
,
97 if (sdata
->vif
.bss_conf
.basic_rates
!= basic_rates
)
100 cfg80211_chandef_create(&sta_chan_def
, sdata
->vif
.bss_conf
.chandef
.chan
,
102 ieee80211_chandef_ht_oper(ie
->ht_operation
, &sta_chan_def
);
104 if (ie
->vht_cap_elem
)
105 vht_cap_info
= le32_to_cpu(ie
->vht_cap_elem
->vht_cap_info
);
107 ieee80211_chandef_vht_oper(&sdata
->local
->hw
, vht_cap_info
,
108 ie
->vht_operation
, ie
->ht_operation
,
110 ieee80211_chandef_he_6ghz_oper(sdata
, ie
->he_operation
, ie
->eht_operation
,
113 if (!cfg80211_chandef_compatible(&sdata
->vif
.bss_conf
.chandef
,
121 * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links
123 * @ie: information elements of a management frame from the mesh peer
125 * Returns: %true if the mesh peer is willing to establish peer links
127 bool mesh_peer_accepts_plinks(struct ieee802_11_elems
*ie
)
129 return (ie
->mesh_config
->meshconf_cap
&
130 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS
) != 0;
134 * mesh_accept_plinks_update - update accepting_plink in local mesh beacons
136 * @sdata: mesh interface in which mesh beacons are going to be updated
138 * Returns: beacon changed flag if the beacon content changed.
140 u64
mesh_accept_plinks_update(struct ieee80211_sub_if_data
*sdata
)
145 /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0,
146 * the mesh interface might be able to establish plinks with peers that
147 * are already on the table but are not on PLINK_ESTAB state. However,
148 * in general the mesh interface is not accepting peer link requests
149 * from new peers, and that must be reflected in the beacon
151 free_plinks
= mesh_plink_availables(sdata
);
153 if (free_plinks
!= sdata
->u
.mesh
.accepting_plinks
) {
154 sdata
->u
.mesh
.accepting_plinks
= free_plinks
;
155 changed
= BSS_CHANGED_BEACON
;
162 * mesh_sta_cleanup - clean up any mesh sta state
164 * @sta: mesh sta to clean up.
166 void mesh_sta_cleanup(struct sta_info
*sta
)
168 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
169 u64 changed
= mesh_plink_deactivate(sta
);
172 ieee80211_mbss_info_change_notify(sdata
, changed
);
175 int mesh_rmc_init(struct ieee80211_sub_if_data
*sdata
)
179 sdata
->u
.mesh
.rmc
= kmalloc(sizeof(struct mesh_rmc
), GFP_KERNEL
);
180 if (!sdata
->u
.mesh
.rmc
)
182 sdata
->u
.mesh
.rmc
->idx_mask
= RMC_BUCKETS
- 1;
183 for (i
= 0; i
< RMC_BUCKETS
; i
++)
184 INIT_HLIST_HEAD(&sdata
->u
.mesh
.rmc
->bucket
[i
]);
188 void mesh_rmc_free(struct ieee80211_sub_if_data
*sdata
)
190 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
192 struct hlist_node
*n
;
195 if (!sdata
->u
.mesh
.rmc
)
198 for (i
= 0; i
< RMC_BUCKETS
; i
++) {
199 hlist_for_each_entry_safe(p
, n
, &rmc
->bucket
[i
], list
) {
201 kmem_cache_free(rm_cache
, p
);
206 sdata
->u
.mesh
.rmc
= NULL
;
210 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
213 * @sa: source address
214 * @mesh_hdr: mesh_header
216 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
218 * Checks using the source address and the mesh sequence number if we have
219 * received this frame lately. If the frame is not in the cache, it is added to
222 int mesh_rmc_check(struct ieee80211_sub_if_data
*sdata
,
223 const u8
*sa
, struct ieee80211s_hdr
*mesh_hdr
)
225 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
230 struct hlist_node
*n
;
235 /* Don't care about endianness since only match matters */
236 memcpy(&seqnum
, &mesh_hdr
->seqnum
, sizeof(mesh_hdr
->seqnum
));
237 idx
= le32_to_cpu(mesh_hdr
->seqnum
) & rmc
->idx_mask
;
238 hlist_for_each_entry_safe(p
, n
, &rmc
->bucket
[idx
], list
) {
240 if (time_after(jiffies
, p
->exp_time
) ||
241 entries
== RMC_QUEUE_MAX_LEN
) {
243 kmem_cache_free(rm_cache
, p
);
245 } else if ((seqnum
== p
->seqnum
) && ether_addr_equal(sa
, p
->sa
))
249 p
= kmem_cache_alloc(rm_cache
, GFP_ATOMIC
);
254 p
->exp_time
= jiffies
+ RMC_TIMEOUT
;
255 memcpy(p
->sa
, sa
, ETH_ALEN
);
256 hlist_add_head(&p
->list
, &rmc
->bucket
[idx
]);
260 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data
*sdata
,
263 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
265 u8 meshconf_len
= sizeof(struct ieee80211_meshconf_ie
);
266 bool is_connected_to_gate
= ifmsh
->num_gates
> 0 ||
267 ifmsh
->mshcfg
.dot11MeshGateAnnouncementProtocol
||
268 ifmsh
->mshcfg
.dot11MeshConnectedToMeshGate
;
269 bool is_connected_to_as
= ifmsh
->mshcfg
.dot11MeshConnectedToAuthServer
;
271 if (skb_tailroom(skb
) < 2 + meshconf_len
)
274 pos
= skb_put(skb
, 2 + meshconf_len
);
275 *pos
++ = WLAN_EID_MESH_CONFIG
;
276 *pos
++ = meshconf_len
;
278 /* save a pointer for quick updates in pre-tbtt */
279 ifmsh
->meshconf_offset
= pos
- skb
->data
;
281 /* Active path selection protocol ID */
282 *pos
++ = ifmsh
->mesh_pp_id
;
283 /* Active path selection metric ID */
284 *pos
++ = ifmsh
->mesh_pm_id
;
285 /* Congestion control mode identifier */
286 *pos
++ = ifmsh
->mesh_cc_id
;
287 /* Synchronization protocol identifier */
288 *pos
++ = ifmsh
->mesh_sp_id
;
289 /* Authentication Protocol identifier */
290 *pos
++ = ifmsh
->mesh_auth_id
;
291 /* Mesh Formation Info - number of neighbors */
292 neighbors
= atomic_read(&ifmsh
->estab_plinks
);
293 neighbors
= min_t(int, neighbors
, IEEE80211_MAX_MESH_PEERINGS
);
294 *pos
++ = (is_connected_to_as
<< 7) |
296 is_connected_to_gate
;
297 /* Mesh capability */
299 *pos
|= ifmsh
->mshcfg
.dot11MeshForwarding
?
300 IEEE80211_MESHCONF_CAPAB_FORWARDING
: 0x00;
301 *pos
|= ifmsh
->accepting_plinks
?
302 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS
: 0x00;
303 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
304 *pos
|= ifmsh
->ps_peers_deep_sleep
?
305 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL
: 0x00;
309 int mesh_add_meshid_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
311 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
314 if (skb_tailroom(skb
) < 2 + ifmsh
->mesh_id_len
)
317 pos
= skb_put(skb
, 2 + ifmsh
->mesh_id_len
);
318 *pos
++ = WLAN_EID_MESH_ID
;
319 *pos
++ = ifmsh
->mesh_id_len
;
320 if (ifmsh
->mesh_id_len
)
321 memcpy(pos
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
);
326 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data
*sdata
,
329 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
332 /* see IEEE802.11-2012 13.14.6 */
333 if (ifmsh
->ps_peers_light_sleep
== 0 &&
334 ifmsh
->ps_peers_deep_sleep
== 0 &&
335 ifmsh
->nonpeer_pm
== NL80211_MESH_POWER_ACTIVE
)
338 if (skb_tailroom(skb
) < 4)
341 pos
= skb_put(skb
, 2 + 2);
342 *pos
++ = WLAN_EID_MESH_AWAKE_WINDOW
;
344 put_unaligned_le16(ifmsh
->mshcfg
.dot11MeshAwakeWindowDuration
, pos
);
349 int mesh_add_vendor_ies(struct ieee80211_sub_if_data
*sdata
,
352 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
356 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
359 /* fast-forward to vendor IEs */
360 offset
= ieee80211_ie_split_vendor(ifmsh
->ie
, ifmsh
->ie_len
, 0);
362 if (offset
< ifmsh
->ie_len
) {
363 len
= ifmsh
->ie_len
- offset
;
364 data
= ifmsh
->ie
+ offset
;
365 if (skb_tailroom(skb
) < len
)
367 skb_put_data(skb
, data
, len
);
373 int mesh_add_rsn_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
375 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
379 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
383 data
= cfg80211_find_ie(WLAN_EID_RSN
, ifmsh
->ie
, ifmsh
->ie_len
);
389 if (skb_tailroom(skb
) < len
)
391 skb_put_data(skb
, data
, len
);
396 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data
*sdata
,
399 struct ieee80211_chanctx_conf
*chanctx_conf
;
400 struct ieee80211_channel
*chan
;
403 if (skb_tailroom(skb
) < 3)
407 chanctx_conf
= rcu_dereference(sdata
->vif
.bss_conf
.chanctx_conf
);
408 if (WARN_ON(!chanctx_conf
)) {
412 chan
= chanctx_conf
->def
.chan
;
415 pos
= skb_put(skb
, 2 + 1);
416 *pos
++ = WLAN_EID_DS_PARAMS
;
418 *pos
++ = ieee80211_frequency_to_channel(chan
->center_freq
);
423 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
426 struct ieee80211_supported_band
*sband
;
429 sband
= ieee80211_get_sband(sdata
);
433 /* HT not allowed in 6 GHz */
434 if (sband
->band
== NL80211_BAND_6GHZ
)
437 if (!sband
->ht_cap
.ht_supported
||
438 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
439 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
440 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
443 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_cap
))
446 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_cap
));
447 ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
, sband
->ht_cap
.cap
);
452 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data
*sdata
,
455 struct ieee80211_local
*local
= sdata
->local
;
456 struct ieee80211_chanctx_conf
*chanctx_conf
;
457 struct ieee80211_channel
*channel
;
458 struct ieee80211_supported_band
*sband
;
459 struct ieee80211_sta_ht_cap
*ht_cap
;
463 chanctx_conf
= rcu_dereference(sdata
->vif
.bss_conf
.chanctx_conf
);
464 if (WARN_ON(!chanctx_conf
)) {
468 channel
= chanctx_conf
->def
.chan
;
471 sband
= local
->hw
.wiphy
->bands
[channel
->band
];
472 ht_cap
= &sband
->ht_cap
;
474 /* HT not allowed in 6 GHz */
475 if (sband
->band
== NL80211_BAND_6GHZ
)
478 if (!ht_cap
->ht_supported
||
479 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
480 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
481 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
484 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_operation
))
487 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_operation
));
488 ieee80211_ie_build_ht_oper(pos
, ht_cap
, &sdata
->vif
.bss_conf
.chandef
,
489 sdata
->vif
.bss_conf
.ht_operation_mode
,
495 int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
498 struct ieee80211_supported_band
*sband
;
501 sband
= ieee80211_get_sband(sdata
);
505 /* VHT not allowed in 6 GHz */
506 if (sband
->band
== NL80211_BAND_6GHZ
)
509 if (!sband
->vht_cap
.vht_supported
||
510 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
511 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
512 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
515 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_vht_cap
))
518 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_vht_cap
));
519 ieee80211_ie_build_vht_cap(pos
, &sband
->vht_cap
, sband
->vht_cap
.cap
);
524 int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data
*sdata
,
527 struct ieee80211_local
*local
= sdata
->local
;
528 struct ieee80211_chanctx_conf
*chanctx_conf
;
529 struct ieee80211_channel
*channel
;
530 struct ieee80211_supported_band
*sband
;
531 struct ieee80211_sta_vht_cap
*vht_cap
;
535 chanctx_conf
= rcu_dereference(sdata
->vif
.bss_conf
.chanctx_conf
);
536 if (WARN_ON(!chanctx_conf
)) {
540 channel
= chanctx_conf
->def
.chan
;
543 sband
= local
->hw
.wiphy
->bands
[channel
->band
];
544 vht_cap
= &sband
->vht_cap
;
546 /* VHT not allowed in 6 GHz */
547 if (sband
->band
== NL80211_BAND_6GHZ
)
550 if (!vht_cap
->vht_supported
||
551 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
552 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
553 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
556 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_vht_operation
))
559 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_vht_operation
));
560 ieee80211_ie_build_vht_oper(pos
, vht_cap
,
561 &sdata
->vif
.bss_conf
.chandef
);
566 int mesh_add_he_cap_ie(struct ieee80211_sub_if_data
*sdata
,
567 struct sk_buff
*skb
, u8 ie_len
)
569 const struct ieee80211_sta_he_cap
*he_cap
;
570 struct ieee80211_supported_band
*sband
;
573 sband
= ieee80211_get_sband(sdata
);
577 he_cap
= ieee80211_get_he_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
580 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
581 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
582 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
585 if (skb_tailroom(skb
) < ie_len
)
588 pos
= skb_put(skb
, ie_len
);
589 ieee80211_ie_build_he_cap(0, pos
, he_cap
, pos
+ ie_len
);
594 int mesh_add_he_oper_ie(struct ieee80211_sub_if_data
*sdata
,
597 const struct ieee80211_sta_he_cap
*he_cap
;
598 struct ieee80211_supported_band
*sband
;
602 sband
= ieee80211_get_sband(sdata
);
606 he_cap
= ieee80211_get_he_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
608 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
609 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
610 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
613 len
= 2 + 1 + sizeof(struct ieee80211_he_operation
);
614 if (sdata
->vif
.bss_conf
.chandef
.chan
->band
== NL80211_BAND_6GHZ
)
615 len
+= sizeof(struct ieee80211_he_6ghz_oper
);
617 if (skb_tailroom(skb
) < len
)
620 pos
= skb_put(skb
, len
);
621 ieee80211_ie_build_he_oper(pos
, &sdata
->vif
.bss_conf
.chandef
);
626 int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data
*sdata
,
629 struct ieee80211_supported_band
*sband
;
630 const struct ieee80211_sband_iftype_data
*iftd
;
632 sband
= ieee80211_get_sband(sdata
);
636 iftd
= ieee80211_get_sband_iftype_data(sband
,
637 NL80211_IFTYPE_MESH_POINT
);
638 /* The device doesn't support HE in mesh mode or at all */
642 ieee80211_ie_build_he_6ghz_cap(sdata
, sdata
->deflink
.smps_mode
, skb
);
646 int mesh_add_eht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
647 struct sk_buff
*skb
, u8 ie_len
)
649 const struct ieee80211_sta_he_cap
*he_cap
;
650 const struct ieee80211_sta_eht_cap
*eht_cap
;
651 struct ieee80211_supported_band
*sband
;
654 sband
= ieee80211_get_sband(sdata
);
658 he_cap
= ieee80211_get_he_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
659 eht_cap
= ieee80211_get_eht_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
660 if (!he_cap
|| !eht_cap
||
661 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
662 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
663 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
666 if (skb_tailroom(skb
) < ie_len
)
669 pos
= skb_put(skb
, ie_len
);
670 ieee80211_ie_build_eht_cap(pos
, he_cap
, eht_cap
, pos
+ ie_len
, false);
675 int mesh_add_eht_oper_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
677 const struct ieee80211_sta_eht_cap
*eht_cap
;
678 struct ieee80211_supported_band
*sband
;
682 sband
= ieee80211_get_sband(sdata
);
686 eht_cap
= ieee80211_get_eht_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
688 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
689 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
690 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
693 len
= 2 + 1 + offsetof(struct ieee80211_eht_operation
, optional
) +
694 offsetof(struct ieee80211_eht_operation_info
, optional
);
696 if (skb_tailroom(skb
) < len
)
699 pos
= skb_put(skb
, len
);
700 ieee80211_ie_build_eht_oper(pos
, &sdata
->vif
.bss_conf
.chandef
, eht_cap
);
705 static void ieee80211_mesh_path_timer(struct timer_list
*t
)
707 struct ieee80211_sub_if_data
*sdata
=
708 from_timer(sdata
, t
, u
.mesh
.mesh_path_timer
);
710 wiphy_work_queue(sdata
->local
->hw
.wiphy
, &sdata
->work
);
713 static void ieee80211_mesh_path_root_timer(struct timer_list
*t
)
715 struct ieee80211_sub_if_data
*sdata
=
716 from_timer(sdata
, t
, u
.mesh
.mesh_path_root_timer
);
717 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
719 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
721 wiphy_work_queue(sdata
->local
->hw
.wiphy
, &sdata
->work
);
724 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh
*ifmsh
)
726 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
> IEEE80211_ROOTMODE_ROOT
)
727 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
729 clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
730 /* stop running timer */
731 del_timer_sync(&ifmsh
->mesh_path_root_timer
);
736 ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data
*sdata
,
739 struct ieee80211_supported_band
*sband
;
740 const struct element
*cap
;
741 const struct ieee80211_he_operation
*he_oper
= NULL
;
743 sband
= ieee80211_get_sband(sdata
);
747 if (!ieee80211_get_he_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
) ||
748 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
||
749 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_5
||
750 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_10
)
753 sdata
->vif
.bss_conf
.he_support
= true;
755 cap
= cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION
, ie
, ie_len
);
756 if (cap
&& cap
->datalen
>= 1 + sizeof(*he_oper
) &&
757 cap
->datalen
>= 1 + ieee80211_he_oper_size(cap
->data
+ 1))
758 he_oper
= (void *)(cap
->data
+ 1);
761 sdata
->vif
.bss_conf
.he_oper
.params
=
762 __le32_to_cpu(he_oper
->he_oper_params
);
764 sdata
->vif
.bss_conf
.eht_support
=
765 !!ieee80211_get_eht_iftype_cap(sband
, NL80211_IFTYPE_MESH_POINT
);
768 bool ieee80211_mesh_xmit_fast(struct ieee80211_sub_if_data
*sdata
,
769 struct sk_buff
*skb
, u32 ctrl_flags
)
771 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
772 struct ieee80211_mesh_fast_tx
*entry
;
773 struct ieee80211s_hdr
*meshhdr
;
774 u8 sa
[ETH_ALEN
] __aligned(2);
775 struct tid_ampdu_tx
*tid_tx
;
776 struct sta_info
*sta
;
777 bool copy_sa
= false;
781 if (ctrl_flags
& IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP
)
784 if (ifmsh
->mshcfg
.dot11MeshNolearn
)
787 /* Add support for these cases later */
788 if (ifmsh
->ps_peers_light_sleep
|| ifmsh
->ps_peers_deep_sleep
)
791 if (is_multicast_ether_addr(skb
->data
))
794 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
795 if (ethertype
< ETH_P_802_3_MIN
)
798 if (skb
->sk
&& skb_shinfo(skb
)->tx_flags
& SKBTX_WIFI_STATUS
)
801 if (skb
->ip_summed
== CHECKSUM_PARTIAL
) {
802 skb_set_transport_header(skb
, skb_checksum_start_offset(skb
));
803 if (skb_checksum_help(skb
))
807 entry
= mesh_fast_tx_get(sdata
, skb
->data
);
811 if (skb_headroom(skb
) < entry
->hdrlen
+ entry
->fast_tx
.hdr_len
)
814 sta
= rcu_dereference(entry
->mpath
->next_hop
);
818 tid
= skb
->priority
& IEEE80211_QOS_CTL_TAG1D_MASK
;
819 tid_tx
= rcu_dereference(sta
->ampdu_mlme
.tid_tx
[tid
]);
821 if (!test_bit(HT_AGG_STATE_OPERATIONAL
, &tid_tx
->state
))
824 tid_tx
->last_tx
= jiffies
;
827 skb
= skb_share_check(skb
, GFP_ATOMIC
);
831 skb_set_queue_mapping(skb
, ieee80211_select_queue(sdata
, sta
, skb
));
833 meshhdr
= (struct ieee80211s_hdr
*)entry
->hdr
;
834 if ((meshhdr
->flags
& MESH_FLAGS_AE
) == MESH_FLAGS_AE_A5_A6
) {
835 /* preserve SA from eth header for 6-addr frames */
836 ether_addr_copy(sa
, skb
->data
+ ETH_ALEN
);
840 memcpy(skb_push(skb
, entry
->hdrlen
- 2 * ETH_ALEN
), entry
->hdr
,
843 meshhdr
= (struct ieee80211s_hdr
*)skb
->data
;
844 put_unaligned_le32(atomic_inc_return(&sdata
->u
.mesh
.mesh_seqnum
),
846 meshhdr
->ttl
= sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
;
848 ether_addr_copy(meshhdr
->eaddr2
, sa
);
850 skb_push(skb
, 2 * ETH_ALEN
);
851 __ieee80211_xmit_fast(sdata
, sta
, &entry
->fast_tx
, skb
, tid_tx
,
852 entry
->mpath
->dst
, sdata
->vif
.addr
);
858 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
859 * @hdr: 802.11 frame header
860 * @fc: frame control field
861 * @meshda: destination address in the mesh
862 * @meshsa: source address in the mesh. Same as TA, as frame is
863 * locally originated.
865 * Returns: the length of the 802.11 frame header (excludes mesh control header)
867 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr
*hdr
, __le16
*fc
,
868 const u8
*meshda
, const u8
*meshsa
)
870 if (is_multicast_ether_addr(meshda
)) {
871 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
873 memcpy(hdr
->addr1
, meshda
, ETH_ALEN
);
874 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
875 memcpy(hdr
->addr3
, meshsa
, ETH_ALEN
);
878 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
880 eth_zero_addr(hdr
->addr1
); /* RA is resolved later */
881 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
882 memcpy(hdr
->addr3
, meshda
, ETH_ALEN
);
883 memcpy(hdr
->addr4
, meshsa
, ETH_ALEN
);
889 * ieee80211_new_mesh_header - create a new mesh header
890 * @sdata: mesh interface to be used
891 * @meshhdr: uninitialized mesh header
892 * @addr4or5: 1st address in the ae header, which may correspond to address 4
893 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
895 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
898 * Returns: the header length
900 unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data
*sdata
,
901 struct ieee80211s_hdr
*meshhdr
,
902 const char *addr4or5
, const char *addr6
)
904 if (WARN_ON(!addr4or5
&& addr6
))
907 memset(meshhdr
, 0, sizeof(*meshhdr
));
909 meshhdr
->ttl
= sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
;
911 put_unaligned_le32(atomic_inc_return(&sdata
->u
.mesh
.mesh_seqnum
),
913 if (addr4or5
&& !addr6
) {
914 meshhdr
->flags
|= MESH_FLAGS_AE_A4
;
915 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
917 } else if (addr4or5
&& addr6
) {
918 meshhdr
->flags
|= MESH_FLAGS_AE_A5_A6
;
919 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
920 memcpy(meshhdr
->eaddr2
, addr6
, ETH_ALEN
);
927 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data
*sdata
)
929 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
932 if (ifmsh
->mshcfg
.plink_timeout
> 0)
933 ieee80211_sta_expire(sdata
, ifmsh
->mshcfg
.plink_timeout
* HZ
);
934 mesh_path_expire(sdata
);
936 changed
= mesh_accept_plinks_update(sdata
);
937 ieee80211_mbss_info_change_notify(sdata
, changed
);
939 mesh_fast_tx_gc(sdata
);
941 mod_timer(&ifmsh
->housekeeping_timer
,
942 round_jiffies(jiffies
+
943 IEEE80211_MESH_HOUSEKEEPING_INTERVAL
));
946 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data
*sdata
)
948 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
951 mesh_path_tx_root_frame(sdata
);
953 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
== IEEE80211_PROACTIVE_RANN
)
954 interval
= ifmsh
->mshcfg
.dot11MeshHWMPRannInterval
;
956 interval
= ifmsh
->mshcfg
.dot11MeshHWMProotInterval
;
958 mod_timer(&ifmsh
->mesh_path_root_timer
,
959 round_jiffies(TU_TO_EXP_TIME(interval
)));
963 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh
*ifmsh
)
965 struct beacon_data
*bcn
;
966 int head_len
, tail_len
;
968 struct ieee80211_mgmt
*mgmt
;
969 struct ieee80211_chanctx_conf
*chanctx_conf
;
970 struct mesh_csa_settings
*csa
;
971 enum nl80211_band band
;
972 u8 ie_len_he_cap
, ie_len_eht_cap
;
974 struct ieee80211_sub_if_data
*sdata
;
975 int hdr_len
= offsetofend(struct ieee80211_mgmt
, u
.beacon
);
977 sdata
= container_of(ifmsh
, struct ieee80211_sub_if_data
, u
.mesh
);
979 chanctx_conf
= rcu_dereference(sdata
->vif
.bss_conf
.chanctx_conf
);
980 band
= chanctx_conf
->def
.chan
->band
;
983 ie_len_he_cap
= ieee80211_ie_len_he_cap(sdata
,
984 NL80211_IFTYPE_MESH_POINT
);
985 ie_len_eht_cap
= ieee80211_ie_len_eht_cap(sdata
,
986 NL80211_IFTYPE_MESH_POINT
);
989 /* Channel Switch Announcement */
990 2 + sizeof(struct ieee80211_channel_sw_ie
) +
991 /* Mesh Channel Switch Parameters */
992 2 + sizeof(struct ieee80211_mesh_chansw_params_ie
) +
993 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
994 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie
) +
995 2 + sizeof(struct ieee80211_sec_chan_offs_ie
) +
996 2 + 8 + /* supported rates */
997 2 + 3; /* DS params */
998 tail_len
= 2 + (IEEE80211_MAX_SUPP_RATES
- 8) +
999 2 + sizeof(struct ieee80211_ht_cap
) +
1000 2 + sizeof(struct ieee80211_ht_operation
) +
1001 2 + ifmsh
->mesh_id_len
+
1002 2 + sizeof(struct ieee80211_meshconf_ie
) +
1003 2 + sizeof(__le16
) + /* awake window */
1004 2 + sizeof(struct ieee80211_vht_cap
) +
1005 2 + sizeof(struct ieee80211_vht_operation
) +
1007 2 + 1 + sizeof(struct ieee80211_he_operation
) +
1008 sizeof(struct ieee80211_he_6ghz_oper
) +
1009 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa
) +
1011 2 + 1 + offsetof(struct ieee80211_eht_operation
, optional
) +
1012 offsetof(struct ieee80211_eht_operation_info
, optional
) +
1015 bcn
= kzalloc(sizeof(*bcn
) + head_len
+ tail_len
, GFP_KERNEL
);
1016 /* need an skb for IE builders to operate on */
1017 skb
= __dev_alloc_skb(max(head_len
, tail_len
), GFP_KERNEL
);
1023 * pointers go into the block we allocated,
1024 * memory is | beacon_data | head | tail |
1026 bcn
->head
= ((u8
*) bcn
) + sizeof(*bcn
);
1028 /* fill in the head */
1029 mgmt
= skb_put_zero(skb
, hdr_len
);
1030 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1031 IEEE80211_STYPE_BEACON
);
1032 eth_broadcast_addr(mgmt
->da
);
1033 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1034 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
1035 ieee80211_mps_set_frame_flags(sdata
, NULL
, (void *) mgmt
);
1036 mgmt
->u
.beacon
.beacon_int
=
1037 cpu_to_le16(sdata
->vif
.bss_conf
.beacon_int
);
1038 mgmt
->u
.beacon
.capab_info
|= cpu_to_le16(
1039 sdata
->u
.mesh
.security
? WLAN_CAPABILITY_PRIVACY
: 0);
1041 pos
= skb_put(skb
, 2);
1042 *pos
++ = WLAN_EID_SSID
;
1046 csa
= rcu_dereference(ifmsh
->csa
);
1048 enum nl80211_channel_type ct
;
1049 struct cfg80211_chan_def
*chandef
;
1050 int ie_len
= 2 + sizeof(struct ieee80211_channel_sw_ie
) +
1051 2 + sizeof(struct ieee80211_mesh_chansw_params_ie
);
1053 pos
= skb_put_zero(skb
, ie_len
);
1054 *pos
++ = WLAN_EID_CHANNEL_SWITCH
;
1057 *pos
++ = ieee80211_frequency_to_channel(
1058 csa
->settings
.chandef
.chan
->center_freq
);
1059 bcn
->cntdwn_current_counter
= csa
->settings
.count
;
1060 bcn
->cntdwn_counter_offsets
[0] = hdr_len
+ 6;
1061 *pos
++ = csa
->settings
.count
;
1062 *pos
++ = WLAN_EID_CHAN_SWITCH_PARAM
;
1064 if (ifmsh
->csa_role
== IEEE80211_MESH_CSA_ROLE_INIT
) {
1065 *pos
++ = ifmsh
->mshcfg
.dot11MeshTTL
;
1066 *pos
|= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
1068 *pos
++ = ifmsh
->chsw_ttl
;
1070 *pos
++ |= csa
->settings
.block_tx
?
1071 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
: 0x00;
1072 put_unaligned_le16(WLAN_REASON_MESH_CHAN
, pos
);
1074 put_unaligned_le16(ifmsh
->pre_value
, pos
);
1077 switch (csa
->settings
.chandef
.width
) {
1078 case NL80211_CHAN_WIDTH_40
:
1079 ie_len
= 2 + sizeof(struct ieee80211_sec_chan_offs_ie
);
1080 pos
= skb_put_zero(skb
, ie_len
);
1082 *pos
++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET
; /* EID */
1083 *pos
++ = 1; /* len */
1084 ct
= cfg80211_get_chandef_type(&csa
->settings
.chandef
);
1085 if (ct
== NL80211_CHAN_HT40PLUS
)
1086 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE
;
1088 *pos
++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW
;
1090 case NL80211_CHAN_WIDTH_80
:
1091 case NL80211_CHAN_WIDTH_80P80
:
1092 case NL80211_CHAN_WIDTH_160
:
1093 /* Channel Switch Wrapper + Wide Bandwidth CSA IE */
1095 sizeof(struct ieee80211_wide_bw_chansw_ie
);
1096 pos
= skb_put_zero(skb
, ie_len
);
1098 *pos
++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER
; /* EID */
1099 *pos
++ = 5; /* len */
1101 chandef
= &csa
->settings
.chandef
;
1102 ieee80211_ie_build_wide_bw_cs(pos
, chandef
);
1110 if (ieee80211_add_srates_ie(sdata
, skb
, true, band
) ||
1111 mesh_add_ds_params_ie(sdata
, skb
))
1114 bcn
->head_len
= skb
->len
;
1115 memcpy(bcn
->head
, skb
->data
, bcn
->head_len
);
1119 bcn
->tail
= bcn
->head
+ bcn
->head_len
;
1121 if (ieee80211_add_ext_srates_ie(sdata
, skb
, true, band
) ||
1122 mesh_add_rsn_ie(sdata
, skb
) ||
1123 mesh_add_ht_cap_ie(sdata
, skb
) ||
1124 mesh_add_ht_oper_ie(sdata
, skb
) ||
1125 mesh_add_meshid_ie(sdata
, skb
) ||
1126 mesh_add_meshconf_ie(sdata
, skb
) ||
1127 mesh_add_awake_window_ie(sdata
, skb
) ||
1128 mesh_add_vht_cap_ie(sdata
, skb
) ||
1129 mesh_add_vht_oper_ie(sdata
, skb
) ||
1130 mesh_add_he_cap_ie(sdata
, skb
, ie_len_he_cap
) ||
1131 mesh_add_he_oper_ie(sdata
, skb
) ||
1132 mesh_add_he_6ghz_cap_ie(sdata
, skb
) ||
1133 mesh_add_eht_cap_ie(sdata
, skb
, ie_len_eht_cap
) ||
1134 mesh_add_eht_oper_ie(sdata
, skb
) ||
1135 mesh_add_vendor_ies(sdata
, skb
))
1138 bcn
->tail_len
= skb
->len
;
1139 memcpy(bcn
->tail
, skb
->data
, bcn
->tail_len
);
1140 ieee80211_mesh_update_bss_params(sdata
, bcn
->tail
, bcn
->tail_len
);
1141 bcn
->meshconf
= (struct ieee80211_meshconf_ie
*)
1142 (bcn
->tail
+ ifmsh
->meshconf_offset
);
1145 rcu_assign_pointer(ifmsh
->beacon
, bcn
);
1154 ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data
*sdata
)
1156 struct beacon_data
*old_bcn
;
1159 old_bcn
= sdata_dereference(sdata
->u
.mesh
.beacon
, sdata
);
1160 ret
= ieee80211_mesh_build_beacon(&sdata
->u
.mesh
);
1162 /* just reuse old beacon */
1166 kfree_rcu(old_bcn
, rcu_head
);
1170 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
1173 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1174 unsigned long bits
= changed
;
1180 /* if we race with running work, worst case this work becomes a noop */
1181 for_each_set_bit(bit
, &bits
, sizeof(changed
) * BITS_PER_BYTE
)
1182 set_bit(bit
, ifmsh
->mbss_changed
);
1183 set_bit(MESH_WORK_MBSS_CHANGED
, &ifmsh
->wrkq_flags
);
1184 wiphy_work_queue(sdata
->local
->hw
.wiphy
, &sdata
->work
);
1187 int ieee80211_start_mesh(struct ieee80211_sub_if_data
*sdata
)
1189 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1190 struct ieee80211_local
*local
= sdata
->local
;
1191 u64 changed
= BSS_CHANGED_BEACON
|
1192 BSS_CHANGED_BEACON_ENABLED
|
1194 BSS_CHANGED_BASIC_RATES
|
1195 BSS_CHANGED_BEACON_INT
|
1196 BSS_CHANGED_MCAST_RATE
;
1198 local
->fif_other_bss
++;
1199 /* mesh ifaces must set allmulti to forward mcast traffic */
1200 atomic_inc(&local
->iff_allmultis
);
1201 ieee80211_configure_filter(local
);
1203 ifmsh
->mesh_cc_id
= 0; /* Disabled */
1204 /* register sync ops from extensible synchronization framework */
1205 ifmsh
->sync_ops
= ieee80211_mesh_sync_ops_get(ifmsh
->mesh_sp_id
);
1206 ifmsh
->sync_offset_clockdrift_max
= 0;
1207 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
1208 ieee80211_mesh_root_setup(ifmsh
);
1209 wiphy_work_queue(local
->hw
.wiphy
, &sdata
->work
);
1210 sdata
->vif
.bss_conf
.ht_operation_mode
=
1211 ifmsh
->mshcfg
.ht_opmode
;
1212 sdata
->vif
.bss_conf
.enable_beacon
= true;
1214 changed
|= ieee80211_mps_local_status_update(sdata
);
1216 if (ieee80211_mesh_build_beacon(ifmsh
)) {
1217 ieee80211_stop_mesh(sdata
);
1221 ieee80211_recalc_dtim(local
, sdata
);
1222 ieee80211_link_info_change_notify(sdata
, &sdata
->deflink
, changed
);
1224 netif_carrier_on(sdata
->dev
);
1228 void ieee80211_stop_mesh(struct ieee80211_sub_if_data
*sdata
)
1230 struct ieee80211_local
*local
= sdata
->local
;
1231 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1232 struct beacon_data
*bcn
;
1234 netif_carrier_off(sdata
->dev
);
1236 /* flush STAs and mpaths on this iface */
1237 sta_info_flush(sdata
);
1238 ieee80211_free_keys(sdata
, true);
1239 mesh_path_flush_by_iface(sdata
);
1241 /* stop the beacon */
1242 ifmsh
->mesh_id_len
= 0;
1243 sdata
->vif
.bss_conf
.enable_beacon
= false;
1244 sdata
->beacon_rate_set
= false;
1245 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED
, &sdata
->state
);
1246 ieee80211_link_info_change_notify(sdata
, &sdata
->deflink
,
1247 BSS_CHANGED_BEACON_ENABLED
);
1250 bcn
= sdata_dereference(ifmsh
->beacon
, sdata
);
1251 RCU_INIT_POINTER(ifmsh
->beacon
, NULL
);
1252 kfree_rcu(bcn
, rcu_head
);
1254 /* free all potentially still buffered group-addressed frames */
1255 local
->total_ps_buffered
-= skb_queue_len(&ifmsh
->ps
.bc_buf
);
1256 skb_queue_purge(&ifmsh
->ps
.bc_buf
);
1258 del_timer_sync(&sdata
->u
.mesh
.housekeeping_timer
);
1259 del_timer_sync(&sdata
->u
.mesh
.mesh_path_root_timer
);
1260 del_timer_sync(&sdata
->u
.mesh
.mesh_path_timer
);
1262 /* clear any mesh work (for next join) we may have accrued */
1263 ifmsh
->wrkq_flags
= 0;
1264 memset(ifmsh
->mbss_changed
, 0, sizeof(ifmsh
->mbss_changed
));
1266 local
->fif_other_bss
--;
1267 atomic_dec(&local
->iff_allmultis
);
1268 ieee80211_configure_filter(local
);
1271 static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data
*sdata
)
1275 /* if the current channel is a DFS channel, mark the channel as
1278 err
= cfg80211_chandef_dfs_required(sdata
->local
->hw
.wiphy
,
1279 &sdata
->vif
.bss_conf
.chandef
,
1280 NL80211_IFTYPE_MESH_POINT
);
1282 cfg80211_radar_event(sdata
->local
->hw
.wiphy
,
1283 &sdata
->vif
.bss_conf
.chandef
, GFP_ATOMIC
);
1287 ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data
*sdata
,
1288 struct ieee802_11_elems
*elems
, bool beacon
)
1290 struct cfg80211_csa_settings params
;
1291 struct ieee80211_csa_ie csa_ie
;
1292 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1293 struct ieee80211_supported_band
*sband
;
1295 ieee80211_conn_flags_t conn_flags
= 0;
1296 u32 vht_cap_info
= 0;
1298 lockdep_assert_wiphy(sdata
->local
->hw
.wiphy
);
1300 sband
= ieee80211_get_sband(sdata
);
1304 switch (sdata
->vif
.bss_conf
.chandef
.width
) {
1305 case NL80211_CHAN_WIDTH_20_NOHT
:
1306 conn_flags
|= IEEE80211_CONN_DISABLE_HT
;
1308 case NL80211_CHAN_WIDTH_20
:
1309 conn_flags
|= IEEE80211_CONN_DISABLE_40MHZ
;
1311 case NL80211_CHAN_WIDTH_40
:
1312 conn_flags
|= IEEE80211_CONN_DISABLE_VHT
;
1318 if (elems
->vht_cap_elem
)
1320 le32_to_cpu(elems
->vht_cap_elem
->vht_cap_info
);
1322 memset(¶ms
, 0, sizeof(params
));
1323 err
= ieee80211_parse_ch_switch_ie(sdata
, elems
, sband
->band
,
1325 conn_flags
, sdata
->vif
.addr
,
1332 /* Mark the channel unavailable if the reason for the switch is
1335 if (csa_ie
.reason_code
== WLAN_REASON_MESH_CHAN_REGULATORY
)
1336 ieee80211_mesh_csa_mark_radar(sdata
);
1338 params
.chandef
= csa_ie
.chandef
;
1339 params
.count
= csa_ie
.count
;
1341 if (!cfg80211_chandef_usable(sdata
->local
->hw
.wiphy
, ¶ms
.chandef
,
1342 IEEE80211_CHAN_DISABLED
) ||
1343 !cfg80211_reg_can_beacon(sdata
->local
->hw
.wiphy
, ¶ms
.chandef
,
1344 NL80211_IFTYPE_MESH_POINT
)) {
1346 "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1348 params
.chandef
.chan
->center_freq
,
1349 params
.chandef
.width
,
1350 params
.chandef
.center_freq1
,
1351 params
.chandef
.center_freq2
);
1355 err
= cfg80211_chandef_dfs_required(sdata
->local
->hw
.wiphy
,
1357 NL80211_IFTYPE_MESH_POINT
);
1360 if (err
> 0 && !ifmsh
->userspace_handles_dfs
) {
1362 "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n",
1364 params
.chandef
.chan
->center_freq
,
1365 params
.chandef
.width
,
1366 params
.chandef
.center_freq1
,
1367 params
.chandef
.center_freq2
);
1371 params
.radar_required
= err
;
1373 if (cfg80211_chandef_identical(¶ms
.chandef
,
1374 &sdata
->vif
.bss_conf
.chandef
)) {
1376 "received csa with an identical chandef, ignoring\n");
1381 "received channel switch announcement to go to channel %d MHz\n",
1382 params
.chandef
.chan
->center_freq
);
1384 params
.block_tx
= csa_ie
.mode
& WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT
;
1386 ifmsh
->chsw_ttl
= csa_ie
.ttl
- 1;
1387 if (ifmsh
->pre_value
>= csa_ie
.pre_value
)
1389 ifmsh
->pre_value
= csa_ie
.pre_value
;
1392 if (ifmsh
->chsw_ttl
>= ifmsh
->mshcfg
.dot11MeshTTL
)
1395 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_REPEATER
;
1397 if (ieee80211_channel_switch(sdata
->local
->hw
.wiphy
, sdata
->dev
,
1405 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data
*sdata
,
1406 struct ieee80211_mgmt
*mgmt
, size_t len
)
1408 struct ieee80211_local
*local
= sdata
->local
;
1409 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1410 struct sk_buff
*presp
;
1411 struct beacon_data
*bcn
;
1412 struct ieee80211_mgmt
*hdr
;
1413 struct ieee802_11_elems
*elems
;
1417 pos
= mgmt
->u
.probe_req
.variable
;
1418 baselen
= (u8
*) pos
- (u8
*) mgmt
;
1422 elems
= ieee802_11_parse_elems(pos
, len
- baselen
, false, NULL
);
1426 if (!elems
->mesh_id
)
1429 /* 802.11-2012 10.1.4.3.2 */
1430 if ((!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
) &&
1431 !is_broadcast_ether_addr(mgmt
->da
)) ||
1432 elems
->ssid_len
!= 0)
1435 if (elems
->mesh_id_len
!= 0 &&
1436 (elems
->mesh_id_len
!= ifmsh
->mesh_id_len
||
1437 memcmp(elems
->mesh_id
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
)))
1441 bcn
= rcu_dereference(ifmsh
->beacon
);
1446 presp
= dev_alloc_skb(local
->tx_headroom
+
1447 bcn
->head_len
+ bcn
->tail_len
);
1451 skb_reserve(presp
, local
->tx_headroom
);
1452 skb_put_data(presp
, bcn
->head
, bcn
->head_len
);
1453 skb_put_data(presp
, bcn
->tail
, bcn
->tail_len
);
1454 hdr
= (struct ieee80211_mgmt
*) presp
->data
;
1455 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
1456 IEEE80211_STYPE_PROBE_RESP
);
1457 memcpy(hdr
->da
, mgmt
->sa
, ETH_ALEN
);
1458 IEEE80211_SKB_CB(presp
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
1459 ieee80211_tx_skb(sdata
, presp
);
1466 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data
*sdata
,
1468 struct ieee80211_mgmt
*mgmt
,
1470 struct ieee80211_rx_status
*rx_status
)
1472 struct ieee80211_local
*local
= sdata
->local
;
1473 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1474 struct ieee802_11_elems
*elems
;
1475 struct ieee80211_channel
*channel
;
1478 enum nl80211_band band
= rx_status
->band
;
1480 /* ignore ProbeResp to foreign address */
1481 if (stype
== IEEE80211_STYPE_PROBE_RESP
&&
1482 !ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
1485 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
1489 elems
= ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
,
1495 /* ignore non-mesh or secure / unsecure mismatch */
1496 if ((!elems
->mesh_id
|| !elems
->mesh_config
) ||
1497 (elems
->rsn
&& sdata
->u
.mesh
.security
== IEEE80211_MESH_SEC_NONE
) ||
1498 (!elems
->rsn
&& sdata
->u
.mesh
.security
!= IEEE80211_MESH_SEC_NONE
))
1501 if (elems
->ds_params
)
1502 freq
= ieee80211_channel_to_frequency(elems
->ds_params
[0], band
);
1504 freq
= rx_status
->freq
;
1506 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
1508 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
1511 if (mesh_matches_local(sdata
, elems
)) {
1512 mpl_dbg(sdata
, "rssi_threshold=%d,rx_status->signal=%d\n",
1513 sdata
->u
.mesh
.mshcfg
.rssi_threshold
, rx_status
->signal
);
1514 if (!sdata
->u
.mesh
.user_mpm
||
1515 sdata
->u
.mesh
.mshcfg
.rssi_threshold
== 0 ||
1516 sdata
->u
.mesh
.mshcfg
.rssi_threshold
< rx_status
->signal
)
1517 mesh_neighbour_update(sdata
, mgmt
->sa
, elems
,
1520 if (ifmsh
->csa_role
!= IEEE80211_MESH_CSA_ROLE_INIT
&&
1521 !sdata
->vif
.bss_conf
.csa_active
)
1522 ieee80211_mesh_process_chnswitch(sdata
, elems
, true);
1525 if (ifmsh
->sync_ops
)
1526 ifmsh
->sync_ops
->rx_bcn_presp(sdata
, stype
, mgmt
, len
,
1527 elems
->mesh_config
, rx_status
);
1532 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data
*sdata
, u64
*changed
)
1534 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1535 struct mesh_csa_settings
*tmp_csa_settings
;
1538 /* Reset the TTL value and Initiator flag */
1539 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_NONE
;
1540 ifmsh
->chsw_ttl
= 0;
1542 /* Remove the CSA and MCSP elements from the beacon */
1543 tmp_csa_settings
= sdata_dereference(ifmsh
->csa
, sdata
);
1544 RCU_INIT_POINTER(ifmsh
->csa
, NULL
);
1545 if (tmp_csa_settings
)
1546 kfree_rcu(tmp_csa_settings
, rcu_head
);
1547 ret
= ieee80211_mesh_rebuild_beacon(sdata
);
1551 *changed
|= BSS_CHANGED_BEACON
;
1553 mcsa_dbg(sdata
, "complete switching to center freq %d MHz",
1554 sdata
->vif
.bss_conf
.chandef
.chan
->center_freq
);
1558 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data
*sdata
,
1559 struct cfg80211_csa_settings
*csa_settings
,
1562 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1563 struct mesh_csa_settings
*tmp_csa_settings
;
1566 lockdep_assert_wiphy(sdata
->local
->hw
.wiphy
);
1568 tmp_csa_settings
= kmalloc(sizeof(*tmp_csa_settings
),
1570 if (!tmp_csa_settings
)
1573 memcpy(&tmp_csa_settings
->settings
, csa_settings
,
1574 sizeof(struct cfg80211_csa_settings
));
1576 rcu_assign_pointer(ifmsh
->csa
, tmp_csa_settings
);
1578 ret
= ieee80211_mesh_rebuild_beacon(sdata
);
1580 tmp_csa_settings
= rcu_dereference(ifmsh
->csa
);
1581 RCU_INIT_POINTER(ifmsh
->csa
, NULL
);
1582 kfree_rcu(tmp_csa_settings
, rcu_head
);
1586 *changed
|= BSS_CHANGED_BEACON
;
1590 static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data
*sdata
,
1591 struct ieee80211_mgmt
*mgmt
, size_t len
,
1592 struct ieee802_11_elems
*elems
)
1594 struct ieee80211_mgmt
*mgmt_fwd
;
1595 struct sk_buff
*skb
;
1596 struct ieee80211_local
*local
= sdata
->local
;
1598 skb
= dev_alloc_skb(local
->tx_headroom
+ len
);
1601 skb_reserve(skb
, local
->tx_headroom
);
1602 mgmt_fwd
= skb_put(skb
, len
);
1604 elems
->mesh_chansw_params_ie
->mesh_ttl
--;
1605 elems
->mesh_chansw_params_ie
->mesh_flags
&=
1606 ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR
;
1608 memcpy(mgmt_fwd
, mgmt
, len
);
1609 eth_broadcast_addr(mgmt_fwd
->da
);
1610 memcpy(mgmt_fwd
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
1611 memcpy(mgmt_fwd
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
1613 ieee80211_tx_skb(sdata
, skb
);
1617 static void mesh_rx_csa_frame(struct ieee80211_sub_if_data
*sdata
,
1618 struct ieee80211_mgmt
*mgmt
, size_t len
)
1620 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1621 struct ieee802_11_elems
*elems
;
1623 bool fwd_csa
= true;
1627 if (mgmt
->u
.action
.u
.measurement
.action_code
!=
1628 WLAN_ACTION_SPCT_CHL_SWITCH
)
1631 pos
= mgmt
->u
.action
.u
.chan_switch
.variable
;
1632 baselen
= offsetof(struct ieee80211_mgmt
,
1633 u
.action
.u
.chan_switch
.variable
);
1634 elems
= ieee802_11_parse_elems(pos
, len
- baselen
, true, NULL
);
1638 if (!mesh_matches_local(sdata
, elems
))
1641 ifmsh
->chsw_ttl
= elems
->mesh_chansw_params_ie
->mesh_ttl
;
1642 if (!--ifmsh
->chsw_ttl
)
1645 pre_value
= le16_to_cpu(elems
->mesh_chansw_params_ie
->mesh_pre_value
);
1646 if (ifmsh
->pre_value
>= pre_value
)
1649 ifmsh
->pre_value
= pre_value
;
1651 if (!sdata
->vif
.bss_conf
.csa_active
&&
1652 !ieee80211_mesh_process_chnswitch(sdata
, elems
, false)) {
1653 mcsa_dbg(sdata
, "Failed to process CSA action frame");
1657 /* forward or re-broadcast the CSA frame */
1659 if (mesh_fwd_csa_frame(sdata
, mgmt
, len
, elems
) < 0)
1660 mcsa_dbg(sdata
, "Failed to forward the CSA frame");
1666 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data
*sdata
,
1667 struct ieee80211_mgmt
*mgmt
,
1669 struct ieee80211_rx_status
*rx_status
)
1671 switch (mgmt
->u
.action
.category
) {
1672 case WLAN_CATEGORY_SELF_PROTECTED
:
1673 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
1674 case WLAN_SP_MESH_PEERING_OPEN
:
1675 case WLAN_SP_MESH_PEERING_CLOSE
:
1676 case WLAN_SP_MESH_PEERING_CONFIRM
:
1677 mesh_rx_plink_frame(sdata
, mgmt
, len
, rx_status
);
1681 case WLAN_CATEGORY_MESH_ACTION
:
1682 if (mesh_action_is_path_sel(mgmt
))
1683 mesh_rx_path_sel_frame(sdata
, mgmt
, len
);
1685 case WLAN_CATEGORY_SPECTRUM_MGMT
:
1686 mesh_rx_csa_frame(sdata
, mgmt
, len
);
1691 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
1692 struct sk_buff
*skb
)
1694 struct ieee80211_rx_status
*rx_status
;
1695 struct ieee80211_mgmt
*mgmt
;
1698 lockdep_assert_wiphy(sdata
->local
->hw
.wiphy
);
1700 /* mesh already went down */
1701 if (!sdata
->u
.mesh
.mesh_id_len
)
1704 rx_status
= IEEE80211_SKB_RXCB(skb
);
1705 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
1706 stype
= le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_STYPE
;
1709 case IEEE80211_STYPE_PROBE_RESP
:
1710 case IEEE80211_STYPE_BEACON
:
1711 ieee80211_mesh_rx_bcn_presp(sdata
, stype
, mgmt
, skb
->len
,
1714 case IEEE80211_STYPE_PROBE_REQ
:
1715 ieee80211_mesh_rx_probe_req(sdata
, mgmt
, skb
->len
);
1717 case IEEE80211_STYPE_ACTION
:
1718 ieee80211_mesh_rx_mgmt_action(sdata
, mgmt
, skb
->len
, rx_status
);
1723 static void mesh_bss_info_changed(struct ieee80211_sub_if_data
*sdata
)
1725 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1729 for_each_set_bit(bit
, ifmsh
->mbss_changed
,
1730 sizeof(changed
) * BITS_PER_BYTE
) {
1731 clear_bit(bit
, ifmsh
->mbss_changed
);
1732 changed
|= BIT(bit
);
1735 if (sdata
->vif
.bss_conf
.enable_beacon
&&
1736 (changed
& (BSS_CHANGED_BEACON
|
1738 BSS_CHANGED_BASIC_RATES
|
1739 BSS_CHANGED_BEACON_INT
)))
1740 if (ieee80211_mesh_rebuild_beacon(sdata
))
1743 ieee80211_link_info_change_notify(sdata
, &sdata
->deflink
, changed
);
1746 void ieee80211_mesh_work(struct ieee80211_sub_if_data
*sdata
)
1748 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1750 lockdep_assert_wiphy(sdata
->local
->hw
.wiphy
);
1752 /* mesh already went down */
1753 if (!sdata
->u
.mesh
.mesh_id_len
)
1756 if (ifmsh
->preq_queue_len
&&
1758 ifmsh
->last_preq
+ msecs_to_jiffies(ifmsh
->mshcfg
.dot11MeshHWMPpreqMinInterval
)))
1759 mesh_path_start_discovery(sdata
);
1761 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
))
1762 ieee80211_mesh_housekeeping(sdata
);
1764 if (test_and_clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
))
1765 ieee80211_mesh_rootpath(sdata
);
1767 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST
, &ifmsh
->wrkq_flags
))
1768 mesh_sync_adjust_tsf(sdata
);
1770 if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED
, &ifmsh
->wrkq_flags
))
1771 mesh_bss_info_changed(sdata
);
1775 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data
*sdata
)
1777 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1778 static u8 zero_addr
[ETH_ALEN
] = {};
1780 timer_setup(&ifmsh
->housekeeping_timer
,
1781 ieee80211_mesh_housekeeping_timer
, 0);
1783 ifmsh
->accepting_plinks
= true;
1784 atomic_set(&ifmsh
->mpaths
, 0);
1785 mesh_rmc_init(sdata
);
1786 ifmsh
->last_preq
= jiffies
;
1787 ifmsh
->next_perr
= jiffies
;
1788 ifmsh
->csa_role
= IEEE80211_MESH_CSA_ROLE_NONE
;
1789 /* Allocate all mesh structures when creating the first mesh interface. */
1790 if (!mesh_allocated
)
1793 mesh_pathtbl_init(sdata
);
1795 timer_setup(&ifmsh
->mesh_path_timer
, ieee80211_mesh_path_timer
, 0);
1796 timer_setup(&ifmsh
->mesh_path_root_timer
,
1797 ieee80211_mesh_path_root_timer
, 0);
1798 INIT_LIST_HEAD(&ifmsh
->preq_queue
.list
);
1799 skb_queue_head_init(&ifmsh
->ps
.bc_buf
);
1800 spin_lock_init(&ifmsh
->mesh_preq_queue_lock
);
1801 spin_lock_init(&ifmsh
->sync_offset_lock
);
1802 RCU_INIT_POINTER(ifmsh
->beacon
, NULL
);
1804 sdata
->vif
.bss_conf
.bssid
= zero_addr
;
1807 void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1809 mesh_rmc_free(sdata
);
1810 mesh_pathtbl_unregister(sdata
);