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 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)
29 rm_cache
= kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry
),
33 void ieee80211s_stop(void)
37 mesh_pathtbl_unregister();
38 kmem_cache_destroy(rm_cache
);
41 static void ieee80211_mesh_housekeeping_timer(unsigned long data
)
43 struct ieee80211_sub_if_data
*sdata
= (void *) data
;
44 struct ieee80211_local
*local
= sdata
->local
;
45 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
47 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
49 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
53 * mesh_matches_local - check if the config of a mesh point matches ours
55 * @sdata: local mesh subif
56 * @ie: information elements of a management frame from the mesh peer
58 * This function checks if the mesh configuration of a mesh point matches the
59 * local mesh configuration, i.e. if both nodes belong to the same mesh network.
61 bool mesh_matches_local(struct ieee80211_sub_if_data
*sdata
,
62 struct ieee802_11_elems
*ie
)
64 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
65 struct ieee80211_local
*local
= sdata
->local
;
67 struct cfg80211_chan_def sta_chan_def
;
70 * As support for each feature is added, check for matching
71 * - On mesh config capabilities
72 * - Power Save Support En
73 * - Sync support enabled
74 * - Sync support active
75 * - Sync support required from peer
77 * - Power management control on fc
79 if (!(ifmsh
->mesh_id_len
== ie
->mesh_id_len
&&
80 memcmp(ifmsh
->mesh_id
, ie
->mesh_id
, ie
->mesh_id_len
) == 0 &&
81 (ifmsh
->mesh_pp_id
== ie
->mesh_config
->meshconf_psel
) &&
82 (ifmsh
->mesh_pm_id
== ie
->mesh_config
->meshconf_pmetric
) &&
83 (ifmsh
->mesh_cc_id
== ie
->mesh_config
->meshconf_congest
) &&
84 (ifmsh
->mesh_sp_id
== ie
->mesh_config
->meshconf_synch
) &&
85 (ifmsh
->mesh_auth_id
== ie
->mesh_config
->meshconf_auth
)))
88 ieee80211_sta_get_rates(local
, ie
, ieee80211_get_sdata_band(sdata
),
91 if (sdata
->vif
.bss_conf
.basic_rates
!= basic_rates
)
94 ieee80211_ht_oper_to_chandef(sdata
->vif
.bss_conf
.chandef
.chan
,
95 ie
->ht_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
->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_LIST_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
;
188 struct rmc_entry
*p
, *n
;
191 if (!sdata
->u
.mesh
.rmc
)
194 for (i
= 0; i
< RMC_BUCKETS
; i
++) {
195 list_for_each_entry_safe(p
, n
, &rmc
->bucket
[i
], list
) {
197 kmem_cache_free(rm_cache
, p
);
202 sdata
->u
.mesh
.rmc
= NULL
;
206 * mesh_rmc_check - Check frame in recent multicast cache and add if absent.
209 * @sa: source address
210 * @mesh_hdr: mesh_header
212 * Returns: 0 if the frame is not in the cache, nonzero otherwise.
214 * Checks using the source address and the mesh sequence number if we have
215 * received this frame lately. If the frame is not in the cache, it is added to
218 int mesh_rmc_check(struct ieee80211_sub_if_data
*sdata
,
219 const u8
*sa
, struct ieee80211s_hdr
*mesh_hdr
)
221 struct mesh_rmc
*rmc
= sdata
->u
.mesh
.rmc
;
225 struct rmc_entry
*p
, *n
;
227 /* Don't care about endianness since only match matters */
228 memcpy(&seqnum
, &mesh_hdr
->seqnum
, sizeof(mesh_hdr
->seqnum
));
229 idx
= le32_to_cpu(mesh_hdr
->seqnum
) & rmc
->idx_mask
;
230 list_for_each_entry_safe(p
, n
, &rmc
->bucket
[idx
], list
) {
232 if (time_after(jiffies
, p
->exp_time
) ||
233 entries
== RMC_QUEUE_MAX_LEN
) {
235 kmem_cache_free(rm_cache
, p
);
237 } else if ((seqnum
== p
->seqnum
) && ether_addr_equal(sa
, p
->sa
))
241 p
= kmem_cache_alloc(rm_cache
, GFP_ATOMIC
);
246 p
->exp_time
= jiffies
+ RMC_TIMEOUT
;
247 memcpy(p
->sa
, sa
, ETH_ALEN
);
248 list_add(&p
->list
, &rmc
->bucket
[idx
]);
252 int mesh_add_meshconf_ie(struct ieee80211_sub_if_data
*sdata
,
255 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
257 u8 meshconf_len
= sizeof(struct ieee80211_meshconf_ie
);
259 if (skb_tailroom(skb
) < 2 + meshconf_len
)
262 pos
= skb_put(skb
, 2 + meshconf_len
);
263 *pos
++ = WLAN_EID_MESH_CONFIG
;
264 *pos
++ = meshconf_len
;
266 /* Active path selection protocol ID */
267 *pos
++ = ifmsh
->mesh_pp_id
;
268 /* Active path selection metric ID */
269 *pos
++ = ifmsh
->mesh_pm_id
;
270 /* Congestion control mode identifier */
271 *pos
++ = ifmsh
->mesh_cc_id
;
272 /* Synchronization protocol identifier */
273 *pos
++ = ifmsh
->mesh_sp_id
;
274 /* Authentication Protocol identifier */
275 *pos
++ = ifmsh
->mesh_auth_id
;
276 /* Mesh Formation Info - number of neighbors */
277 neighbors
= atomic_read(&ifmsh
->estab_plinks
);
278 /* Number of neighbor mesh STAs or 15 whichever is smaller */
279 neighbors
= (neighbors
> 15) ? 15 : neighbors
;
280 *pos
++ = neighbors
<< 1;
281 /* Mesh capability */
282 *pos
= IEEE80211_MESHCONF_CAPAB_FORWARDING
;
283 *pos
|= ifmsh
->accepting_plinks
?
284 IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS
: 0x00;
285 /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */
286 *pos
|= ifmsh
->ps_peers_deep_sleep
?
287 IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL
: 0x00;
288 *pos
++ |= ifmsh
->adjusting_tbtt
?
289 IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING
: 0x00;
295 int mesh_add_meshid_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
297 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
300 if (skb_tailroom(skb
) < 2 + ifmsh
->mesh_id_len
)
303 pos
= skb_put(skb
, 2 + ifmsh
->mesh_id_len
);
304 *pos
++ = WLAN_EID_MESH_ID
;
305 *pos
++ = ifmsh
->mesh_id_len
;
306 if (ifmsh
->mesh_id_len
)
307 memcpy(pos
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
);
312 static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data
*sdata
,
315 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
318 /* see IEEE802.11-2012 13.14.6 */
319 if (ifmsh
->ps_peers_light_sleep
== 0 &&
320 ifmsh
->ps_peers_deep_sleep
== 0 &&
321 ifmsh
->nonpeer_pm
== NL80211_MESH_POWER_ACTIVE
)
324 if (skb_tailroom(skb
) < 4)
327 pos
= skb_put(skb
, 2 + 2);
328 *pos
++ = WLAN_EID_MESH_AWAKE_WINDOW
;
330 put_unaligned_le16(ifmsh
->mshcfg
.dot11MeshAwakeWindowDuration
, pos
);
335 int mesh_add_vendor_ies(struct ieee80211_sub_if_data
*sdata
,
338 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
342 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
345 /* fast-forward to vendor IEs */
346 offset
= ieee80211_ie_split_vendor(ifmsh
->ie
, ifmsh
->ie_len
, 0);
348 if (offset
< ifmsh
->ie_len
) {
349 len
= ifmsh
->ie_len
- offset
;
350 data
= ifmsh
->ie
+ offset
;
351 if (skb_tailroom(skb
) < len
)
353 memcpy(skb_put(skb
, len
), data
, len
);
359 int mesh_add_rsn_ie(struct ieee80211_sub_if_data
*sdata
, struct sk_buff
*skb
)
361 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
365 if (!ifmsh
->ie
|| !ifmsh
->ie_len
)
370 while (data
< ifmsh
->ie
+ ifmsh
->ie_len
) {
371 if (*data
== WLAN_EID_RSN
) {
379 if (skb_tailroom(skb
) < len
)
381 memcpy(skb_put(skb
, len
), data
, len
);
387 static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data
*sdata
,
390 struct ieee80211_chanctx_conf
*chanctx_conf
;
391 struct ieee80211_channel
*chan
;
394 if (skb_tailroom(skb
) < 3)
398 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
399 if (WARN_ON(!chanctx_conf
)) {
403 chan
= chanctx_conf
->def
.chan
;
406 pos
= skb_put(skb
, 2 + 1);
407 *pos
++ = WLAN_EID_DS_PARAMS
;
409 *pos
++ = ieee80211_frequency_to_channel(chan
->center_freq
);
414 int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data
*sdata
,
417 struct ieee80211_local
*local
= sdata
->local
;
418 enum ieee80211_band band
= ieee80211_get_sdata_band(sdata
);
419 struct ieee80211_supported_band
*sband
;
422 sband
= local
->hw
.wiphy
->bands
[band
];
423 if (!sband
->ht_cap
.ht_supported
||
424 sdata
->vif
.bss_conf
.chandef
.width
== NL80211_CHAN_WIDTH_20_NOHT
)
427 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_cap
))
430 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_cap
));
431 ieee80211_ie_build_ht_cap(pos
, &sband
->ht_cap
, sband
->ht_cap
.cap
);
436 int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data
*sdata
,
439 struct ieee80211_local
*local
= sdata
->local
;
440 struct ieee80211_chanctx_conf
*chanctx_conf
;
441 struct ieee80211_channel
*channel
;
442 enum nl80211_channel_type channel_type
=
443 cfg80211_get_chandef_type(&sdata
->vif
.bss_conf
.chandef
);
444 struct ieee80211_supported_band
*sband
;
445 struct ieee80211_sta_ht_cap
*ht_cap
;
449 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
450 if (WARN_ON(!chanctx_conf
)) {
454 channel
= chanctx_conf
->def
.chan
;
457 sband
= local
->hw
.wiphy
->bands
[channel
->band
];
458 ht_cap
= &sband
->ht_cap
;
460 if (!ht_cap
->ht_supported
|| channel_type
== NL80211_CHAN_NO_HT
)
463 if (skb_tailroom(skb
) < 2 + sizeof(struct ieee80211_ht_operation
))
466 pos
= skb_put(skb
, 2 + sizeof(struct ieee80211_ht_operation
));
467 ieee80211_ie_build_ht_oper(pos
, ht_cap
, &sdata
->vif
.bss_conf
.chandef
,
468 sdata
->vif
.bss_conf
.ht_operation_mode
);
473 static void ieee80211_mesh_path_timer(unsigned long data
)
475 struct ieee80211_sub_if_data
*sdata
=
476 (struct ieee80211_sub_if_data
*) data
;
478 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
481 static void ieee80211_mesh_path_root_timer(unsigned long data
)
483 struct ieee80211_sub_if_data
*sdata
=
484 (struct ieee80211_sub_if_data
*) data
;
485 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
487 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
489 ieee80211_queue_work(&sdata
->local
->hw
, &sdata
->work
);
492 void ieee80211_mesh_root_setup(struct ieee80211_if_mesh
*ifmsh
)
494 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
> IEEE80211_ROOTMODE_ROOT
)
495 set_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
497 clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
);
498 /* stop running timer */
499 del_timer_sync(&ifmsh
->mesh_path_root_timer
);
504 * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame
505 * @hdr: 802.11 frame header
506 * @fc: frame control field
507 * @meshda: destination address in the mesh
508 * @meshsa: source address address in the mesh. Same as TA, as frame is
509 * locally originated.
511 * Return the length of the 802.11 (does not include a mesh control header)
513 int ieee80211_fill_mesh_addresses(struct ieee80211_hdr
*hdr
, __le16
*fc
,
514 const u8
*meshda
, const u8
*meshsa
)
516 if (is_multicast_ether_addr(meshda
)) {
517 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
);
519 memcpy(hdr
->addr1
, meshda
, ETH_ALEN
);
520 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
521 memcpy(hdr
->addr3
, meshsa
, ETH_ALEN
);
524 *fc
|= cpu_to_le16(IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
);
526 memset(hdr
->addr1
, 0, ETH_ALEN
); /* RA is resolved later */
527 memcpy(hdr
->addr2
, meshsa
, ETH_ALEN
);
528 memcpy(hdr
->addr3
, meshda
, ETH_ALEN
);
529 memcpy(hdr
->addr4
, meshsa
, ETH_ALEN
);
535 * ieee80211_new_mesh_header - create a new mesh header
536 * @sdata: mesh interface to be used
537 * @meshhdr: uninitialized mesh header
538 * @addr4or5: 1st address in the ae header, which may correspond to address 4
539 * (if addr6 is NULL) or address 5 (if addr6 is present). It may
541 * @addr6: 2nd address in the ae header, which corresponds to addr6 of the
544 * Return the header length.
546 int ieee80211_new_mesh_header(struct ieee80211_sub_if_data
*sdata
,
547 struct ieee80211s_hdr
*meshhdr
,
548 const char *addr4or5
, const char *addr6
)
550 if (WARN_ON(!addr4or5
&& addr6
))
553 memset(meshhdr
, 0, sizeof(*meshhdr
));
555 meshhdr
->ttl
= sdata
->u
.mesh
.mshcfg
.dot11MeshTTL
;
557 /* FIXME: racy -- TX on multiple queues can be concurrent */
558 put_unaligned(cpu_to_le32(sdata
->u
.mesh
.mesh_seqnum
), &meshhdr
->seqnum
);
559 sdata
->u
.mesh
.mesh_seqnum
++;
561 if (addr4or5
&& !addr6
) {
562 meshhdr
->flags
|= MESH_FLAGS_AE_A4
;
563 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
565 } else if (addr4or5
&& addr6
) {
566 meshhdr
->flags
|= MESH_FLAGS_AE_A5_A6
;
567 memcpy(meshhdr
->eaddr1
, addr4or5
, ETH_ALEN
);
568 memcpy(meshhdr
->eaddr2
, addr6
, ETH_ALEN
);
575 static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data
*sdata
)
577 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
580 ieee80211_sta_expire(sdata
, IEEE80211_MESH_PEER_INACTIVITY_LIMIT
);
581 mesh_path_expire(sdata
);
583 changed
= mesh_accept_plinks_update(sdata
);
584 ieee80211_mbss_info_change_notify(sdata
, changed
);
586 mod_timer(&ifmsh
->housekeeping_timer
,
587 round_jiffies(jiffies
+
588 IEEE80211_MESH_HOUSEKEEPING_INTERVAL
));
591 static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data
*sdata
)
593 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
596 mesh_path_tx_root_frame(sdata
);
598 if (ifmsh
->mshcfg
.dot11MeshHWMPRootMode
== IEEE80211_PROACTIVE_RANN
)
599 interval
= ifmsh
->mshcfg
.dot11MeshHWMPRannInterval
;
601 interval
= ifmsh
->mshcfg
.dot11MeshHWMProotInterval
;
603 mod_timer(&ifmsh
->mesh_path_root_timer
,
604 round_jiffies(TU_TO_EXP_TIME(interval
)));
608 ieee80211_mesh_build_beacon(struct ieee80211_if_mesh
*ifmsh
)
610 struct beacon_data
*bcn
;
611 int head_len
, tail_len
;
613 struct ieee80211_mgmt
*mgmt
;
614 struct ieee80211_chanctx_conf
*chanctx_conf
;
615 enum ieee80211_band band
;
617 struct ieee80211_sub_if_data
*sdata
;
618 int hdr_len
= offsetof(struct ieee80211_mgmt
, u
.beacon
) +
619 sizeof(mgmt
->u
.beacon
);
621 sdata
= container_of(ifmsh
, struct ieee80211_sub_if_data
, u
.mesh
);
623 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
624 band
= chanctx_conf
->def
.chan
->band
;
629 2 + 8 + /* supported rates */
630 2 + 3; /* DS params */
631 tail_len
= 2 + (IEEE80211_MAX_SUPP_RATES
- 8) +
632 2 + sizeof(struct ieee80211_ht_cap
) +
633 2 + sizeof(struct ieee80211_ht_operation
) +
634 2 + ifmsh
->mesh_id_len
+
635 2 + sizeof(struct ieee80211_meshconf_ie
) +
636 2 + sizeof(__le16
) + /* awake window */
639 bcn
= kzalloc(sizeof(*bcn
) + head_len
+ tail_len
, GFP_KERNEL
);
640 /* need an skb for IE builders to operate on */
641 skb
= dev_alloc_skb(max(head_len
, tail_len
));
647 * pointers go into the block we allocated,
648 * memory is | beacon_data | head | tail |
650 bcn
->head
= ((u8
*) bcn
) + sizeof(*bcn
);
652 /* fill in the head */
653 mgmt
= (struct ieee80211_mgmt
*) skb_put(skb
, hdr_len
);
654 memset(mgmt
, 0, hdr_len
);
655 mgmt
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
656 IEEE80211_STYPE_BEACON
);
657 eth_broadcast_addr(mgmt
->da
);
658 memcpy(mgmt
->sa
, sdata
->vif
.addr
, ETH_ALEN
);
659 memcpy(mgmt
->bssid
, sdata
->vif
.addr
, ETH_ALEN
);
660 ieee80211_mps_set_frame_flags(sdata
, NULL
, (void *) mgmt
);
661 mgmt
->u
.beacon
.beacon_int
=
662 cpu_to_le16(sdata
->vif
.bss_conf
.beacon_int
);
663 mgmt
->u
.beacon
.capab_info
|= cpu_to_le16(
664 sdata
->u
.mesh
.security
? WLAN_CAPABILITY_PRIVACY
: 0);
666 pos
= skb_put(skb
, 2);
667 *pos
++ = WLAN_EID_SSID
;
670 if (ieee80211_add_srates_ie(sdata
, skb
, true, band
) ||
671 mesh_add_ds_params_ie(sdata
, skb
))
674 bcn
->head_len
= skb
->len
;
675 memcpy(bcn
->head
, skb
->data
, bcn
->head_len
);
679 bcn
->tail
= bcn
->head
+ bcn
->head_len
;
681 if (ieee80211_add_ext_srates_ie(sdata
, skb
, true, band
) ||
682 mesh_add_rsn_ie(sdata
, skb
) ||
683 mesh_add_ht_cap_ie(sdata
, skb
) ||
684 mesh_add_ht_oper_ie(sdata
, skb
) ||
685 mesh_add_meshid_ie(sdata
, skb
) ||
686 mesh_add_meshconf_ie(sdata
, skb
) ||
687 mesh_add_awake_window_ie(sdata
, skb
) ||
688 mesh_add_vendor_ies(sdata
, skb
))
691 bcn
->tail_len
= skb
->len
;
692 memcpy(bcn
->tail
, skb
->data
, bcn
->tail_len
);
695 rcu_assign_pointer(ifmsh
->beacon
, bcn
);
704 ieee80211_mesh_rebuild_beacon(struct ieee80211_if_mesh
*ifmsh
)
706 struct beacon_data
*old_bcn
;
709 mutex_lock(&ifmsh
->mtx
);
711 old_bcn
= rcu_dereference_protected(ifmsh
->beacon
,
712 lockdep_is_held(&ifmsh
->mtx
));
713 ret
= ieee80211_mesh_build_beacon(ifmsh
);
715 /* just reuse old beacon */
719 kfree_rcu(old_bcn
, rcu_head
);
721 mutex_unlock(&ifmsh
->mtx
);
725 void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
728 if (sdata
->vif
.bss_conf
.enable_beacon
&&
729 (changed
& (BSS_CHANGED_BEACON
|
731 BSS_CHANGED_BASIC_RATES
|
732 BSS_CHANGED_BEACON_INT
)))
733 if (ieee80211_mesh_rebuild_beacon(&sdata
->u
.mesh
))
735 ieee80211_bss_info_change_notify(sdata
, changed
);
738 int ieee80211_start_mesh(struct ieee80211_sub_if_data
*sdata
)
740 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
741 struct ieee80211_local
*local
= sdata
->local
;
742 u32 changed
= BSS_CHANGED_BEACON
|
743 BSS_CHANGED_BEACON_ENABLED
|
745 BSS_CHANGED_BASIC_RATES
|
746 BSS_CHANGED_BEACON_INT
;
747 enum ieee80211_band band
= ieee80211_get_sdata_band(sdata
);
749 local
->fif_other_bss
++;
750 /* mesh ifaces must set allmulti to forward mcast traffic */
751 atomic_inc(&local
->iff_allmultis
);
752 ieee80211_configure_filter(local
);
754 ifmsh
->mesh_cc_id
= 0; /* Disabled */
755 ifmsh
->mesh_auth_id
= 0; /* Disabled */
756 /* register sync ops from extensible synchronization framework */
757 ifmsh
->sync_ops
= ieee80211_mesh_sync_ops_get(ifmsh
->mesh_sp_id
);
758 ifmsh
->adjusting_tbtt
= false;
759 ifmsh
->sync_offset_clockdrift_max
= 0;
760 set_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
);
761 ieee80211_mesh_root_setup(ifmsh
);
762 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
763 sdata
->vif
.bss_conf
.ht_operation_mode
=
764 ifmsh
->mshcfg
.ht_opmode
;
765 sdata
->vif
.bss_conf
.enable_beacon
= true;
766 sdata
->vif
.bss_conf
.basic_rates
=
767 ieee80211_mandatory_rates(local
, band
);
769 changed
|= ieee80211_mps_local_status_update(sdata
);
771 if (ieee80211_mesh_build_beacon(ifmsh
)) {
772 ieee80211_stop_mesh(sdata
);
776 ieee80211_bss_info_change_notify(sdata
, changed
);
778 netif_carrier_on(sdata
->dev
);
782 void ieee80211_stop_mesh(struct ieee80211_sub_if_data
*sdata
)
784 struct ieee80211_local
*local
= sdata
->local
;
785 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
786 struct beacon_data
*bcn
;
788 netif_carrier_off(sdata
->dev
);
790 /* stop the beacon */
791 ifmsh
->mesh_id_len
= 0;
792 sdata
->vif
.bss_conf
.enable_beacon
= false;
793 clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED
, &sdata
->state
);
794 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_BEACON_ENABLED
);
795 mutex_lock(&ifmsh
->mtx
);
796 bcn
= rcu_dereference_protected(ifmsh
->beacon
,
797 lockdep_is_held(&ifmsh
->mtx
));
798 rcu_assign_pointer(ifmsh
->beacon
, NULL
);
799 kfree_rcu(bcn
, rcu_head
);
800 mutex_unlock(&ifmsh
->mtx
);
802 /* flush STAs and mpaths on this iface */
803 sta_info_flush(sdata
);
804 mesh_path_flush_by_iface(sdata
);
806 /* free all potentially still buffered group-addressed frames */
807 local
->total_ps_buffered
-= skb_queue_len(&ifmsh
->ps
.bc_buf
);
808 skb_queue_purge(&ifmsh
->ps
.bc_buf
);
810 del_timer_sync(&sdata
->u
.mesh
.housekeeping_timer
);
811 del_timer_sync(&sdata
->u
.mesh
.mesh_path_root_timer
);
812 del_timer_sync(&sdata
->u
.mesh
.mesh_path_timer
);
814 * If the timer fired while we waited for it, it will have
815 * requeued the work. Now the work will be running again
816 * but will not rearm the timer again because it checks
817 * whether the interface is running, which, at this point,
820 cancel_work_sync(&sdata
->work
);
822 local
->fif_other_bss
--;
823 atomic_dec(&local
->iff_allmultis
);
824 ieee80211_configure_filter(local
);
828 ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data
*sdata
,
829 struct ieee80211_mgmt
*mgmt
, size_t len
)
831 struct ieee80211_local
*local
= sdata
->local
;
832 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
833 struct sk_buff
*presp
;
834 struct beacon_data
*bcn
;
835 struct ieee80211_mgmt
*hdr
;
836 struct ieee802_11_elems elems
;
840 pos
= mgmt
->u
.probe_req
.variable
;
841 baselen
= (u8
*) pos
- (u8
*) mgmt
;
845 ieee802_11_parse_elems(pos
, len
- baselen
, false, &elems
);
847 /* 802.11-2012 10.1.4.3.2 */
848 if ((!ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
) &&
849 !is_broadcast_ether_addr(mgmt
->da
)) ||
853 if (elems
.mesh_id_len
!= 0 &&
854 (elems
.mesh_id_len
!= ifmsh
->mesh_id_len
||
855 memcmp(elems
.mesh_id
, ifmsh
->mesh_id
, ifmsh
->mesh_id_len
)))
859 bcn
= rcu_dereference(ifmsh
->beacon
);
864 presp
= dev_alloc_skb(local
->tx_headroom
+
865 bcn
->head_len
+ bcn
->tail_len
);
869 skb_reserve(presp
, local
->tx_headroom
);
870 memcpy(skb_put(presp
, bcn
->head_len
), bcn
->head
, bcn
->head_len
);
871 memcpy(skb_put(presp
, bcn
->tail_len
), bcn
->tail
, bcn
->tail_len
);
872 hdr
= (struct ieee80211_mgmt
*) presp
->data
;
873 hdr
->frame_control
= cpu_to_le16(IEEE80211_FTYPE_MGMT
|
874 IEEE80211_STYPE_PROBE_RESP
);
875 memcpy(hdr
->da
, mgmt
->sa
, ETH_ALEN
);
876 IEEE80211_SKB_CB(presp
)->flags
|= IEEE80211_TX_INTFL_DONT_ENCRYPT
;
877 ieee80211_tx_skb(sdata
, presp
);
882 static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data
*sdata
,
884 struct ieee80211_mgmt
*mgmt
,
886 struct ieee80211_rx_status
*rx_status
)
888 struct ieee80211_local
*local
= sdata
->local
;
889 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
890 struct ieee802_11_elems elems
;
891 struct ieee80211_channel
*channel
;
894 enum ieee80211_band band
= rx_status
->band
;
896 /* ignore ProbeResp to foreign address */
897 if (stype
== IEEE80211_STYPE_PROBE_RESP
&&
898 !ether_addr_equal(mgmt
->da
, sdata
->vif
.addr
))
901 baselen
= (u8
*) mgmt
->u
.probe_resp
.variable
- (u8
*) mgmt
;
905 ieee802_11_parse_elems(mgmt
->u
.probe_resp
.variable
, len
- baselen
,
908 /* ignore non-mesh or secure / unsecure mismatch */
909 if ((!elems
.mesh_id
|| !elems
.mesh_config
) ||
910 (elems
.rsn
&& sdata
->u
.mesh
.security
== IEEE80211_MESH_SEC_NONE
) ||
911 (!elems
.rsn
&& sdata
->u
.mesh
.security
!= IEEE80211_MESH_SEC_NONE
))
915 freq
= ieee80211_channel_to_frequency(elems
.ds_params
[0], band
);
917 freq
= rx_status
->freq
;
919 channel
= ieee80211_get_channel(local
->hw
.wiphy
, freq
);
921 if (!channel
|| channel
->flags
& IEEE80211_CHAN_DISABLED
)
924 if (mesh_matches_local(sdata
, &elems
))
925 mesh_neighbour_update(sdata
, mgmt
->sa
, &elems
);
928 ifmsh
->sync_ops
->rx_bcn_presp(sdata
,
929 stype
, mgmt
, &elems
, rx_status
);
932 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data
*sdata
,
933 struct ieee80211_mgmt
*mgmt
,
935 struct ieee80211_rx_status
*rx_status
)
937 switch (mgmt
->u
.action
.category
) {
938 case WLAN_CATEGORY_SELF_PROTECTED
:
939 switch (mgmt
->u
.action
.u
.self_prot
.action_code
) {
940 case WLAN_SP_MESH_PEERING_OPEN
:
941 case WLAN_SP_MESH_PEERING_CLOSE
:
942 case WLAN_SP_MESH_PEERING_CONFIRM
:
943 mesh_rx_plink_frame(sdata
, mgmt
, len
, rx_status
);
947 case WLAN_CATEGORY_MESH_ACTION
:
948 if (mesh_action_is_path_sel(mgmt
))
949 mesh_rx_path_sel_frame(sdata
, mgmt
, len
);
954 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data
*sdata
,
957 struct ieee80211_rx_status
*rx_status
;
958 struct ieee80211_mgmt
*mgmt
;
961 rx_status
= IEEE80211_SKB_RXCB(skb
);
962 mgmt
= (struct ieee80211_mgmt
*) skb
->data
;
963 stype
= le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_STYPE
;
966 case IEEE80211_STYPE_PROBE_RESP
:
967 case IEEE80211_STYPE_BEACON
:
968 ieee80211_mesh_rx_bcn_presp(sdata
, stype
, mgmt
, skb
->len
,
971 case IEEE80211_STYPE_PROBE_REQ
:
972 ieee80211_mesh_rx_probe_req(sdata
, mgmt
, skb
->len
);
974 case IEEE80211_STYPE_ACTION
:
975 ieee80211_mesh_rx_mgmt_action(sdata
, mgmt
, skb
->len
, rx_status
);
980 void ieee80211_mesh_work(struct ieee80211_sub_if_data
*sdata
)
982 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
984 if (ifmsh
->preq_queue_len
&&
986 ifmsh
->last_preq
+ msecs_to_jiffies(ifmsh
->mshcfg
.dot11MeshHWMPpreqMinInterval
)))
987 mesh_path_start_discovery(sdata
);
989 if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE
, &ifmsh
->wrkq_flags
))
990 mesh_mpath_table_grow();
992 if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE
, &ifmsh
->wrkq_flags
))
993 mesh_mpp_table_grow();
995 if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING
, &ifmsh
->wrkq_flags
))
996 ieee80211_mesh_housekeeping(sdata
);
998 if (test_and_clear_bit(MESH_WORK_ROOT
, &ifmsh
->wrkq_flags
))
999 ieee80211_mesh_rootpath(sdata
);
1001 if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST
, &ifmsh
->wrkq_flags
))
1002 mesh_sync_adjust_tbtt(sdata
);
1005 void ieee80211_mesh_notify_scan_completed(struct ieee80211_local
*local
)
1007 struct ieee80211_sub_if_data
*sdata
;
1010 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
)
1011 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1012 ieee80211_sdata_running(sdata
))
1013 ieee80211_queue_work(&local
->hw
, &sdata
->work
);
1017 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data
*sdata
)
1019 struct ieee80211_if_mesh
*ifmsh
= &sdata
->u
.mesh
;
1020 static u8 zero_addr
[ETH_ALEN
] = {};
1022 setup_timer(&ifmsh
->housekeeping_timer
,
1023 ieee80211_mesh_housekeeping_timer
,
1024 (unsigned long) sdata
);
1026 ifmsh
->accepting_plinks
= true;
1029 ifmsh
->num_gates
= 0;
1030 atomic_set(&ifmsh
->mpaths
, 0);
1031 mesh_rmc_init(sdata
);
1032 ifmsh
->last_preq
= jiffies
;
1033 ifmsh
->next_perr
= jiffies
;
1034 /* Allocate all mesh structures when creating the first mesh interface. */
1035 if (!mesh_allocated
)
1037 setup_timer(&ifmsh
->mesh_path_timer
,
1038 ieee80211_mesh_path_timer
,
1039 (unsigned long) sdata
);
1040 setup_timer(&ifmsh
->mesh_path_root_timer
,
1041 ieee80211_mesh_path_root_timer
,
1042 (unsigned long) sdata
);
1043 INIT_LIST_HEAD(&ifmsh
->preq_queue
.list
);
1044 skb_queue_head_init(&ifmsh
->ps
.bc_buf
);
1045 spin_lock_init(&ifmsh
->mesh_preq_queue_lock
);
1046 spin_lock_init(&ifmsh
->sync_offset_lock
);
1047 RCU_INIT_POINTER(ifmsh
->beacon
, NULL
);
1048 mutex_init(&ifmsh
->mtx
);
1050 sdata
->vif
.bss_conf
.bssid
= zero_addr
;