Commit | Line | Data |
---|---|---|
2e3c8736 | 1 | /* |
264d9b7d | 2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
2e3c8736 LCC |
3 | * Authors: Luis Carlos Cobo <luisca@cozybit.com> |
4 | * Javier Cardona <javier@cozybit.com> | |
5 | * | |
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. | |
9 | */ | |
10 | ||
5a0e3ad6 | 11 | #include <linux/slab.h> |
51ceddad | 12 | #include <asm/unaligned.h> |
2e3c8736 LCC |
13 | #include "ieee80211_i.h" |
14 | #include "mesh.h" | |
b8456a14 | 15 | #include "driver-ops.h" |
2e3c8736 | 16 | |
bf7cd94d | 17 | static int mesh_allocated; |
2e3c8736 LCC |
18 | static struct kmem_cache *rm_cache; |
19 | ||
25d49e4d TP |
20 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
21 | { | |
22 | return (mgmt->u.action.u.mesh_action.action_code == | |
23 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
24 | } | |
25d49e4d | 25 | |
2e3c8736 LCC |
26 | void ieee80211s_init(void) |
27 | { | |
2e3c8736 LCC |
28 | mesh_allocated = 1; |
29 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
30 | 0, 0, NULL); | |
31 | } | |
32 | ||
33 | void ieee80211s_stop(void) | |
34 | { | |
bf7cd94d JB |
35 | if (!mesh_allocated) |
36 | return; | |
2e3c8736 LCC |
37 | kmem_cache_destroy(rm_cache); |
38 | } | |
39 | ||
34f11cd3 | 40 | static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) |
472dbc45 | 41 | { |
34f11cd3 KC |
42 | struct ieee80211_sub_if_data *sdata = |
43 | from_timer(sdata, t, u.mesh.housekeeping_timer); | |
472dbc45 JB |
44 | struct ieee80211_local *local = sdata->local; |
45 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
46 | ||
6b9ac442 | 47 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 48 | |
64592c8f | 49 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
50 | } |
51 | ||
2e3c8736 LCC |
52 | /** |
53 | * mesh_matches_local - check if the config of a mesh point matches ours | |
54 | * | |
f698d856 | 55 | * @sdata: local mesh subif |
f743ff49 | 56 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
57 | * |
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. | |
60 | */ | |
f743ff49 TP |
61 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
62 | struct ieee802_11_elems *ie) | |
2e3c8736 | 63 | { |
472dbc45 | 64 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
f743ff49 | 65 | u32 basic_rates = 0; |
4bf88530 | 66 | struct cfg80211_chan_def sta_chan_def; |
21a8e9dd | 67 | struct ieee80211_supported_band *sband; |
2e3c8736 | 68 | |
2e3c8736 LCC |
69 | /* |
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 | |
76 | * - MDA enabled | |
77 | * - Power management control on fc | |
78 | */ | |
739522ba TP |
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))) | |
bf7cd94d | 86 | return false; |
739522ba | 87 | |
21a8e9dd MSS |
88 | sband = ieee80211_get_sband(sdata); |
89 | if (!sband) | |
90 | return false; | |
91 | ||
92 | ieee80211_sta_get_rates(sdata, ie, sband->band, | |
f743ff49 TP |
93 | &basic_rates); |
94 | ||
fe40cb62 | 95 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 96 | return false; |
fe40cb62 | 97 | |
8ac3c704 JB |
98 | cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, |
99 | NL80211_CHAN_NO_HT); | |
100 | ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); | |
101 | ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def); | |
c85fb53c | 102 | |
4bf88530 JB |
103 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
104 | &sta_chan_def)) | |
bf7cd94d | 105 | return false; |
2e3c8736 | 106 | |
739522ba | 107 | return true; |
2e3c8736 LCC |
108 | } |
109 | ||
110 | /** | |
111 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
112 | * | |
113 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 114 | */ |
f698d856 | 115 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 116 | { |
136cfa28 | 117 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 118 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
119 | } |
120 | ||
121 | /** | |
2c53040f | 122 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 123 | * |
d0709a65 | 124 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
125 | * |
126 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 127 | */ |
df323818 | 128 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 129 | { |
2e3c8736 | 130 | bool free_plinks; |
df323818 | 131 | u32 changed = 0; |
2e3c8736 LCC |
132 | |
133 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
134 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
135 | * are already on the table but are not on PLINK_ESTAB state. However, |
136 | * in general the mesh interface is not accepting peer link requests | |
137 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
138 | */ |
139 | free_plinks = mesh_plink_availables(sdata); | |
140 | ||
df323818 MP |
141 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
142 | sdata->u.mesh.accepting_plinks = free_plinks; | |
143 | changed = BSS_CHANGED_BEACON; | |
144 | } | |
145 | ||
146 | return changed; | |
2e3c8736 LCC |
147 | } |
148 | ||
45b5028e TP |
149 | /* |
150 | * mesh_sta_cleanup - clean up any mesh sta state | |
151 | * | |
152 | * @sta: mesh sta to clean up. | |
153 | */ | |
154 | void mesh_sta_cleanup(struct sta_info *sta) | |
155 | { | |
156 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
efc401f4 | 157 | u32 changed = mesh_plink_deactivate(sta); |
fe7a7c57 | 158 | |
f81a9ded | 159 | if (changed) |
2b5e1967 | 160 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
161 | } |
162 | ||
f698d856 | 163 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 164 | { |
2e3c8736 LCC |
165 | int i; |
166 | ||
472dbc45 JB |
167 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
168 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 169 | return -ENOMEM; |
472dbc45 | 170 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 171 | for (i = 0; i < RMC_BUCKETS; i++) |
47a0489c | 172 | INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
173 | return 0; |
174 | } | |
175 | ||
f698d856 | 176 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 177 | { |
472dbc45 | 178 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
47a0489c BC |
179 | struct rmc_entry *p; |
180 | struct hlist_node *n; | |
2e3c8736 LCC |
181 | int i; |
182 | ||
472dbc45 | 183 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
184 | return; |
185 | ||
bf7cd94d | 186 | for (i = 0; i < RMC_BUCKETS; i++) { |
47a0489c BC |
187 | hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
188 | hlist_del(&p->list); | |
2e3c8736 LCC |
189 | kmem_cache_free(rm_cache, p); |
190 | } | |
bf7cd94d | 191 | } |
2e3c8736 LCC |
192 | |
193 | kfree(rmc); | |
472dbc45 | 194 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
195 | } |
196 | ||
197 | /** | |
198 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
199 | * | |
bf7cd94d | 200 | * @sdata: interface |
2e3c8736 LCC |
201 | * @sa: source address |
202 | * @mesh_hdr: mesh_header | |
203 | * | |
204 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
205 | * | |
206 | * Checks using the source address and the mesh sequence number if we have | |
207 | * received this frame lately. If the frame is not in the cache, it is added to | |
208 | * it. | |
209 | */ | |
bf7cd94d JB |
210 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
211 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 212 | { |
472dbc45 | 213 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
214 | u32 seqnum = 0; |
215 | int entries = 0; | |
216 | u8 idx; | |
47a0489c BC |
217 | struct rmc_entry *p; |
218 | struct hlist_node *n; | |
2e3c8736 | 219 | |
0aa7fabb BC |
220 | if (!rmc) |
221 | return -1; | |
222 | ||
2e3c8736 | 223 | /* Don't care about endianness since only match matters */ |
51ceddad LCC |
224 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
225 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
47a0489c | 226 | hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
227 | ++entries; |
228 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 229 | entries == RMC_QUEUE_MAX_LEN) { |
47a0489c | 230 | hlist_del(&p->list); |
2e3c8736 LCC |
231 | kmem_cache_free(rm_cache, p); |
232 | --entries; | |
bf7cd94d | 233 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
234 | return -1; |
235 | } | |
236 | ||
237 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 238 | if (!p) |
2e3c8736 | 239 | return 0; |
d15b8459 | 240 | |
2e3c8736 LCC |
241 | p->seqnum = seqnum; |
242 | p->exp_time = jiffies + RMC_TIMEOUT; | |
243 | memcpy(p->sa, sa, ETH_ALEN); | |
47a0489c | 244 | hlist_add_head(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
245 | return 0; |
246 | } | |
247 | ||
bf7cd94d JB |
248 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
249 | struct sk_buff *skb) | |
082ebb0c TP |
250 | { |
251 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
252 | u8 *pos, neighbors; | |
253 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
254 | ||
255 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
256 | return -ENOMEM; | |
257 | ||
258 | pos = skb_put(skb, 2 + meshconf_len); | |
259 | *pos++ = WLAN_EID_MESH_CONFIG; | |
260 | *pos++ = meshconf_len; | |
261 | ||
43552be1 TP |
262 | /* save a pointer for quick updates in pre-tbtt */ |
263 | ifmsh->meshconf_offset = pos - skb->data; | |
264 | ||
082ebb0c TP |
265 | /* Active path selection protocol ID */ |
266 | *pos++ = ifmsh->mesh_pp_id; | |
267 | /* Active path selection metric ID */ | |
268 | *pos++ = ifmsh->mesh_pm_id; | |
269 | /* Congestion control mode identifier */ | |
270 | *pos++ = ifmsh->mesh_cc_id; | |
271 | /* Synchronization protocol identifier */ | |
272 | *pos++ = ifmsh->mesh_sp_id; | |
273 | /* Authentication Protocol identifier */ | |
274 | *pos++ = ifmsh->mesh_auth_id; | |
275 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 276 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 277 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
278 | *pos++ = neighbors << 1; |
279 | /* Mesh capability */ | |
b60e527a CYY |
280 | *pos = 0x00; |
281 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
282 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 283 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 284 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
285 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
286 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 287 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
082ebb0c TP |
288 | return 0; |
289 | } | |
290 | ||
bf7cd94d | 291 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
292 | { |
293 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
294 | u8 *pos; | |
295 | ||
296 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
297 | return -ENOMEM; | |
298 | ||
299 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
300 | *pos++ = WLAN_EID_MESH_ID; | |
301 | *pos++ = ifmsh->mesh_id_len; | |
302 | if (ifmsh->mesh_id_len) | |
303 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
bf7cd94d JB |
308 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
309 | struct sk_buff *skb) | |
3f52b7e3 MP |
310 | { |
311 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
312 | u8 *pos; | |
313 | ||
314 | /* see IEEE802.11-2012 13.14.6 */ | |
315 | if (ifmsh->ps_peers_light_sleep == 0 && | |
316 | ifmsh->ps_peers_deep_sleep == 0 && | |
317 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
318 | return 0; | |
319 | ||
320 | if (skb_tailroom(skb) < 4) | |
321 | return -ENOMEM; | |
322 | ||
323 | pos = skb_put(skb, 2 + 2); | |
324 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
325 | *pos++ = 2; | |
326 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
bf7cd94d JB |
331 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
332 | struct sk_buff *skb) | |
082ebb0c TP |
333 | { |
334 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
335 | u8 offset, len; | |
336 | const u8 *data; | |
337 | ||
338 | if (!ifmsh->ie || !ifmsh->ie_len) | |
339 | return 0; | |
340 | ||
341 | /* fast-forward to vendor IEs */ | |
342 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
343 | ||
da7061c8 | 344 | if (offset < ifmsh->ie_len) { |
082ebb0c TP |
345 | len = ifmsh->ie_len - offset; |
346 | data = ifmsh->ie + offset; | |
347 | if (skb_tailroom(skb) < len) | |
348 | return -ENOMEM; | |
59ae1d12 | 349 | skb_put_data(skb, data, len); |
082ebb0c TP |
350 | } |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
bf7cd94d | 355 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
356 | { |
357 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
358 | u8 len = 0; | |
359 | const u8 *data; | |
360 | ||
361 | if (!ifmsh->ie || !ifmsh->ie_len) | |
362 | return 0; | |
363 | ||
364 | /* find RSN IE */ | |
a40a8c17 BC |
365 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
366 | if (!data) | |
367 | return 0; | |
082ebb0c | 368 | |
a40a8c17 BC |
369 | len = data[1] + 2; |
370 | ||
371 | if (skb_tailroom(skb) < len) | |
372 | return -ENOMEM; | |
59ae1d12 | 373 | skb_put_data(skb, data, len); |
082ebb0c TP |
374 | |
375 | return 0; | |
376 | } | |
377 | ||
bf7cd94d JB |
378 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
379 | struct sk_buff *skb) | |
082ebb0c | 380 | { |
55de908a JB |
381 | struct ieee80211_chanctx_conf *chanctx_conf; |
382 | struct ieee80211_channel *chan; | |
082ebb0c | 383 | u8 *pos; |
2e3c8736 | 384 | |
082ebb0c TP |
385 | if (skb_tailroom(skb) < 3) |
386 | return -ENOMEM; | |
387 | ||
55de908a JB |
388 | rcu_read_lock(); |
389 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
390 | if (WARN_ON(!chanctx_conf)) { | |
391 | rcu_read_unlock(); | |
392 | return -EINVAL; | |
393 | } | |
4bf88530 | 394 | chan = chanctx_conf->def.chan; |
55de908a JB |
395 | rcu_read_unlock(); |
396 | ||
601513aa ET |
397 | pos = skb_put(skb, 2 + 1); |
398 | *pos++ = WLAN_EID_DS_PARAMS; | |
399 | *pos++ = 1; | |
400 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 401 | |
082ebb0c | 402 | return 0; |
2e3c8736 LCC |
403 | } |
404 | ||
bf7cd94d JB |
405 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
406 | struct sk_buff *skb) | |
176f3608 | 407 | { |
176f3608 TP |
408 | struct ieee80211_supported_band *sband; |
409 | u8 *pos; | |
410 | ||
21a8e9dd MSS |
411 | sband = ieee80211_get_sband(sdata); |
412 | if (!sband) | |
413 | return -EINVAL; | |
414 | ||
176f3608 | 415 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
416 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
417 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
418 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
419 | return 0; |
420 | ||
421 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
422 | return -ENOMEM; | |
423 | ||
424 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 425 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
426 | |
427 | return 0; | |
428 | } | |
429 | ||
bf7cd94d JB |
430 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
431 | struct sk_buff *skb) | |
176f3608 TP |
432 | { |
433 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
434 | struct ieee80211_chanctx_conf *chanctx_conf; |
435 | struct ieee80211_channel *channel; | |
55de908a JB |
436 | struct ieee80211_supported_band *sband; |
437 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
438 | u8 *pos; |
439 | ||
55de908a JB |
440 | rcu_read_lock(); |
441 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
442 | if (WARN_ON(!chanctx_conf)) { | |
443 | rcu_read_unlock(); | |
444 | return -EINVAL; | |
445 | } | |
4bf88530 | 446 | channel = chanctx_conf->def.chan; |
55de908a JB |
447 | rcu_read_unlock(); |
448 | ||
449 | sband = local->hw.wiphy->bands[channel->band]; | |
450 | ht_cap = &sband->ht_cap; | |
451 | ||
c85fb53c BC |
452 | if (!ht_cap->ht_supported || |
453 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
454 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
455 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
456 | return 0; |
457 | ||
074d46d1 | 458 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
459 | return -ENOMEM; |
460 | ||
074d46d1 | 461 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 462 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
463 | sdata->vif.bss_conf.ht_operation_mode, |
464 | false); | |
176f3608 TP |
465 | |
466 | return 0; | |
467 | } | |
bf7cd94d | 468 | |
c85fb53c BC |
469 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
470 | struct sk_buff *skb) | |
471 | { | |
c85fb53c BC |
472 | struct ieee80211_supported_band *sband; |
473 | u8 *pos; | |
474 | ||
21a8e9dd MSS |
475 | sband = ieee80211_get_sband(sdata); |
476 | if (!sband) | |
477 | return -EINVAL; | |
478 | ||
c85fb53c BC |
479 | if (!sband->vht_cap.vht_supported || |
480 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
481 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
482 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
483 | return 0; | |
484 | ||
485 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
486 | return -ENOMEM; | |
487 | ||
488 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
489 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
495 | struct sk_buff *skb) | |
496 | { | |
497 | struct ieee80211_local *local = sdata->local; | |
498 | struct ieee80211_chanctx_conf *chanctx_conf; | |
499 | struct ieee80211_channel *channel; | |
500 | struct ieee80211_supported_band *sband; | |
501 | struct ieee80211_sta_vht_cap *vht_cap; | |
502 | u8 *pos; | |
503 | ||
504 | rcu_read_lock(); | |
505 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
506 | if (WARN_ON(!chanctx_conf)) { | |
507 | rcu_read_unlock(); | |
508 | return -EINVAL; | |
509 | } | |
510 | channel = chanctx_conf->def.chan; | |
511 | rcu_read_unlock(); | |
512 | ||
513 | sband = local->hw.wiphy->bands[channel->band]; | |
514 | vht_cap = &sband->vht_cap; | |
515 | ||
516 | if (!vht_cap->vht_supported || | |
517 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
518 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
519 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
520 | return 0; | |
521 | ||
522 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
523 | return -ENOMEM; | |
524 | ||
525 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
526 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
527 | &sdata->vif.bss_conf.chandef); | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
34f11cd3 | 532 | static void ieee80211_mesh_path_timer(struct timer_list *t) |
2e3c8736 LCC |
533 | { |
534 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 535 | from_timer(sdata, t, u.mesh.mesh_path_timer); |
5bb644a0 | 536 | |
690205f1 | 537 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
538 | } |
539 | ||
34f11cd3 | 540 | static void ieee80211_mesh_path_root_timer(struct timer_list *t) |
e304bfd3 RP |
541 | { |
542 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 543 | from_timer(sdata, t, u.mesh.mesh_path_root_timer); |
e304bfd3 | 544 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
e304bfd3 RP |
545 | |
546 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
547 | ||
690205f1 | 548 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
549 | } |
550 | ||
63c5723b RP |
551 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
552 | { | |
dbb912cd | 553 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
554 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
555 | else { | |
556 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
557 | /* stop running timer */ | |
558 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
559 | } | |
560 | } | |
561 | ||
3c5772a5 JC |
562 | /** |
563 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 564 | * @hdr: 802.11 frame header |
3c5772a5 JC |
565 | * @fc: frame control field |
566 | * @meshda: destination address in the mesh | |
567 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
568 | * locally originated. | |
569 | * | |
570 | * Return the length of the 802.11 (does not include a mesh control header) | |
571 | */ | |
15ff6365 JB |
572 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
573 | const u8 *meshda, const u8 *meshsa) | |
574 | { | |
3c5772a5 JC |
575 | if (is_multicast_ether_addr(meshda)) { |
576 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
577 | /* DA TA SA */ | |
578 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
579 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
580 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
581 | return 24; | |
582 | } else { | |
2154c81c | 583 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 584 | /* RA TA DA SA */ |
c84a67a2 | 585 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
586 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
587 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
588 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
589 | return 30; | |
590 | } | |
591 | } | |
592 | ||
902acc78 JB |
593 | /** |
594 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 595 | * @sdata: mesh interface to be used |
bf7cd94d | 596 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
597 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
598 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
599 | * be NULL. | |
600 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
601 | * mesh frame | |
902acc78 JB |
602 | * |
603 | * Return the header length. | |
604 | */ | |
5edfcee5 AH |
605 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
606 | struct ieee80211s_hdr *meshhdr, | |
607 | const char *addr4or5, const char *addr6) | |
902acc78 | 608 | { |
bf7cd94d JB |
609 | if (WARN_ON(!addr4or5 && addr6)) |
610 | return 0; | |
611 | ||
0c3cee72 | 612 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 613 | |
472dbc45 | 614 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
615 | |
616 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
617 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
618 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 619 | |
61ad5394 | 620 | if (addr4or5 && !addr6) { |
3c5772a5 | 621 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 622 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 623 | return 2 * ETH_ALEN; |
61ad5394 | 624 | } else if (addr4or5 && addr6) { |
3c5772a5 | 625 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
626 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
627 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 628 | return 3 * ETH_ALEN; |
3c5772a5 | 629 | } |
bf7cd94d JB |
630 | |
631 | return ETH_ALEN; | |
902acc78 JB |
632 | } |
633 | ||
bf7cd94d | 634 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 635 | { |
bf7cd94d | 636 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 637 | u32 changed; |
472dbc45 | 638 | |
31f909a2 MH |
639 | if (ifmsh->mshcfg.plink_timeout > 0) |
640 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
641 | mesh_path_expire(sdata); |
642 | ||
df323818 | 643 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 644 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 645 | |
472dbc45 | 646 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
647 | round_jiffies(jiffies + |
648 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
649 | } |
650 | ||
e304bfd3 RP |
651 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
652 | { | |
653 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 654 | u32 interval; |
e304bfd3 RP |
655 | |
656 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
657 | |
658 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
659 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
660 | else | |
661 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
662 | ||
e304bfd3 | 663 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 664 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
665 | } |
666 | ||
2b5e1967 TP |
667 | static int |
668 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
669 | { | |
670 | struct beacon_data *bcn; | |
671 | int head_len, tail_len; | |
672 | struct sk_buff *skb; | |
673 | struct ieee80211_mgmt *mgmt; | |
674 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 675 | struct mesh_csa_settings *csa; |
57fbcce3 | 676 | enum nl80211_band band; |
2b5e1967 TP |
677 | u8 *pos; |
678 | struct ieee80211_sub_if_data *sdata; | |
4c121fd6 | 679 | int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); |
2b5e1967 TP |
680 | |
681 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
682 | rcu_read_lock(); | |
683 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
684 | band = chanctx_conf->def.chan->band; | |
685 | rcu_read_unlock(); | |
686 | ||
687 | head_len = hdr_len + | |
688 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
689 | /* Channel Switch Announcement */ |
690 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
08a7e621 | 691 | /* Mesh Channel Switch Parameters */ |
b8456a14 | 692 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + |
75d627d5 SW |
693 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ |
694 | 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + | |
695 | 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
2b5e1967 TP |
696 | 2 + 8 + /* supported rates */ |
697 | 2 + 3; /* DS params */ | |
698 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
699 | 2 + sizeof(struct ieee80211_ht_cap) + | |
700 | 2 + sizeof(struct ieee80211_ht_operation) + | |
701 | 2 + ifmsh->mesh_id_len + | |
702 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
703 | 2 + sizeof(__le16) + /* awake window */ | |
c85fb53c BC |
704 | 2 + sizeof(struct ieee80211_vht_cap) + |
705 | 2 + sizeof(struct ieee80211_vht_operation) + | |
2b5e1967 TP |
706 | ifmsh->ie_len; |
707 | ||
708 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
709 | /* need an skb for IE builders to operate on */ | |
710 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
711 | ||
712 | if (!bcn || !skb) | |
713 | goto out_free; | |
714 | ||
715 | /* | |
716 | * pointers go into the block we allocated, | |
717 | * memory is | beacon_data | head | tail | | |
718 | */ | |
719 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
720 | ||
721 | /* fill in the head */ | |
b080db58 | 722 | mgmt = skb_put_zero(skb, hdr_len); |
2b5e1967 TP |
723 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
724 | IEEE80211_STYPE_BEACON); | |
725 | eth_broadcast_addr(mgmt->da); | |
726 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
727 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
728 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
729 | mgmt->u.beacon.beacon_int = | |
730 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
731 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
732 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
733 | ||
734 | pos = skb_put(skb, 2); | |
735 | *pos++ = WLAN_EID_SSID; | |
736 | *pos++ = 0x0; | |
737 | ||
b8456a14 CYY |
738 | rcu_read_lock(); |
739 | csa = rcu_dereference(ifmsh->csa); | |
740 | if (csa) { | |
75d627d5 SW |
741 | enum nl80211_channel_type ct; |
742 | struct cfg80211_chan_def *chandef; | |
743 | int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
744 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); | |
745 | ||
e45a79da | 746 | pos = skb_put_zero(skb, ie_len); |
b8456a14 CYY |
747 | *pos++ = WLAN_EID_CHANNEL_SWITCH; |
748 | *pos++ = 3; | |
749 | *pos++ = 0x0; | |
750 | *pos++ = ieee80211_frequency_to_channel( | |
751 | csa->settings.chandef.chan->center_freq); | |
8df734e8 | 752 | bcn->csa_current_counter = csa->settings.count; |
af296bdb | 753 | bcn->csa_counter_offsets[0] = hdr_len + 6; |
b8456a14 CYY |
754 | *pos++ = csa->settings.count; |
755 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
756 | *pos++ = 6; | |
0cb4d4dc | 757 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
758 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
759 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
760 | } else { | |
761 | *pos++ = ifmsh->chsw_ttl; | |
762 | } | |
763 | *pos++ |= csa->settings.block_tx ? | |
764 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
765 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
766 | pos += 2; | |
ca91dc97 | 767 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 | 768 | pos += 2; |
75d627d5 SW |
769 | |
770 | switch (csa->settings.chandef.width) { | |
771 | case NL80211_CHAN_WIDTH_40: | |
772 | ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
e45a79da | 773 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
774 | |
775 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ | |
776 | *pos++ = 1; /* len */ | |
777 | ct = cfg80211_get_chandef_type(&csa->settings.chandef); | |
778 | if (ct == NL80211_CHAN_HT40PLUS) | |
779 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; | |
780 | else | |
781 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
782 | break; | |
783 | case NL80211_CHAN_WIDTH_80: | |
784 | case NL80211_CHAN_WIDTH_80P80: | |
785 | case NL80211_CHAN_WIDTH_160: | |
786 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ | |
787 | ie_len = 2 + 2 + | |
788 | sizeof(struct ieee80211_wide_bw_chansw_ie); | |
e45a79da | 789 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
790 | |
791 | *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ | |
792 | *pos++ = 5; /* len */ | |
793 | /* put sub IE */ | |
794 | chandef = &csa->settings.chandef; | |
795 | ieee80211_ie_build_wide_bw_cs(pos, chandef); | |
796 | break; | |
797 | default: | |
798 | break; | |
799 | } | |
b8456a14 CYY |
800 | } |
801 | rcu_read_unlock(); | |
802 | ||
2b5e1967 | 803 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 804 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
805 | goto out_free; |
806 | ||
807 | bcn->head_len = skb->len; | |
808 | memcpy(bcn->head, skb->data, bcn->head_len); | |
809 | ||
810 | /* now the tail */ | |
811 | skb_trim(skb, 0); | |
812 | bcn->tail = bcn->head + bcn->head_len; | |
813 | ||
814 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
815 | mesh_add_rsn_ie(sdata, skb) || |
816 | mesh_add_ht_cap_ie(sdata, skb) || | |
817 | mesh_add_ht_oper_ie(sdata, skb) || | |
818 | mesh_add_meshid_ie(sdata, skb) || | |
819 | mesh_add_meshconf_ie(sdata, skb) || | |
820 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
821 | mesh_add_vht_cap_ie(sdata, skb) || |
822 | mesh_add_vht_oper_ie(sdata, skb) || | |
bf7cd94d | 823 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
824 | goto out_free; |
825 | ||
826 | bcn->tail_len = skb->len; | |
827 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
43552be1 TP |
828 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
829 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
830 | |
831 | dev_kfree_skb(skb); | |
832 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
833 | return 0; | |
834 | out_free: | |
835 | kfree(bcn); | |
836 | dev_kfree_skb(skb); | |
837 | return -ENOMEM; | |
838 | } | |
839 | ||
840 | static int | |
8d61ffa5 | 841 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 842 | { |
2b5e1967 TP |
843 | struct beacon_data *old_bcn; |
844 | int ret; | |
2b5e1967 | 845 | |
8d61ffa5 JB |
846 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
847 | lockdep_is_held(&sdata->wdev.mtx)); | |
848 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
849 | if (ret) |
850 | /* just reuse old beacon */ | |
8d61ffa5 | 851 | return ret; |
2b5e1967 TP |
852 | |
853 | if (old_bcn) | |
854 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 855 | return 0; |
2b5e1967 TP |
856 | } |
857 | ||
858 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
859 | u32 changed) | |
860 | { | |
f81a9ded TP |
861 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
862 | unsigned long bits = changed; | |
863 | u32 bit; | |
864 | ||
865 | if (!bits) | |
866 | return; | |
867 | ||
868 | /* if we race with running work, worst case this work becomes a noop */ | |
869 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
870 | set_bit(bit, &ifmsh->mbss_changed); | |
871 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
872 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
873 | } |
874 | ||
875 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
876 | { |
877 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
878 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
879 | u32 changed = BSS_CHANGED_BEACON | |
880 | BSS_CHANGED_BEACON_ENABLED | | |
881 | BSS_CHANGED_HT | | |
882 | BSS_CHANGED_BASIC_RATES | | |
dcbe73ca PKC |
883 | BSS_CHANGED_BEACON_INT | |
884 | BSS_CHANGED_MCAST_RATE; | |
472dbc45 | 885 | |
09b17470 JB |
886 | local->fif_other_bss++; |
887 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
888 | atomic_inc(&local->iff_allmultis); | |
889 | ieee80211_configure_filter(local); | |
890 | ||
c7108a71 | 891 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
892 | /* register sync ops from extensible synchronization framework */ |
893 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
dbf498fb | 894 | ifmsh->sync_offset_clockdrift_max = 0; |
6b9ac442 | 895 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 896 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 897 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
898 | sdata->vif.bss_conf.ht_operation_mode = |
899 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 900 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 901 | |
39886b61 | 902 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 903 | |
2b5e1967 TP |
904 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
905 | ieee80211_stop_mesh(sdata); | |
906 | return -ENOMEM; | |
907 | } | |
908 | ||
057d5f4b | 909 | ieee80211_recalc_dtim(local, sdata); |
f4eabc91 | 910 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
911 | |
912 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 913 | return 0; |
472dbc45 JB |
914 | } |
915 | ||
916 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
917 | { | |
09b17470 | 918 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 919 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 920 | struct beacon_data *bcn; |
29cbe68c | 921 | |
c405c629 JB |
922 | netif_carrier_off(sdata->dev); |
923 | ||
c37a54ac MH |
924 | /* flush STAs and mpaths on this iface */ |
925 | sta_info_flush(sdata); | |
926 | mesh_path_flush_by_iface(sdata); | |
927 | ||
0d466b9c | 928 | /* stop the beacon */ |
29cbe68c | 929 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
930 | sdata->vif.bss_conf.enable_beacon = false; |
931 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 932 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
c37a54ac MH |
933 | |
934 | /* remove beacon */ | |
2b5e1967 | 935 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 936 | lockdep_is_held(&sdata->wdev.mtx)); |
0c2bef46 | 937 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 938 | kfree_rcu(bcn, rcu_head); |
0d466b9c | 939 | |
3f52b7e3 MP |
940 | /* free all potentially still buffered group-addressed frames */ |
941 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
942 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
943 | ||
472dbc45 | 944 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 945 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 946 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 947 | |
f81a9ded TP |
948 | /* clear any mesh work (for next join) we may have accrued */ |
949 | ifmsh->wrkq_flags = 0; | |
950 | ifmsh->mbss_changed = 0; | |
951 | ||
09b17470 JB |
952 | local->fif_other_bss--; |
953 | atomic_dec(&local->iff_allmultis); | |
954 | ieee80211_configure_filter(local); | |
472dbc45 JB |
955 | } |
956 | ||
5d55371b BB |
957 | static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
958 | { | |
959 | int err; | |
960 | ||
961 | /* if the current channel is a DFS channel, mark the channel as | |
962 | * unavailable. | |
963 | */ | |
964 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
965 | &sdata->vif.bss_conf.chandef, | |
966 | NL80211_IFTYPE_MESH_POINT); | |
967 | if (err > 0) | |
968 | cfg80211_radar_event(sdata->local->hw.wiphy, | |
969 | &sdata->vif.bss_conf.chandef, GFP_ATOMIC); | |
970 | } | |
971 | ||
33a45867 CYY |
972 | static bool |
973 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
974 | struct ieee802_11_elems *elems, bool beacon) | |
975 | { | |
976 | struct cfg80211_csa_settings params; | |
977 | struct ieee80211_csa_ie csa_ie; | |
33a45867 | 978 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
21a8e9dd | 979 | struct ieee80211_supported_band *sband; |
0cb4d4dc | 980 | int err; |
33a45867 CYY |
981 | u32 sta_flags; |
982 | ||
dbd72850 MK |
983 | sdata_assert_lock(sdata); |
984 | ||
21a8e9dd MSS |
985 | sband = ieee80211_get_sband(sdata); |
986 | if (!sband) | |
987 | return false; | |
988 | ||
71ec289e | 989 | sta_flags = 0; |
33a45867 CYY |
990 | switch (sdata->vif.bss_conf.chandef.width) { |
991 | case NL80211_CHAN_WIDTH_20_NOHT: | |
992 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
02049ce2 | 993 | /* fall through */ |
33a45867 CYY |
994 | case NL80211_CHAN_WIDTH_20: |
995 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
02049ce2 | 996 | /* fall through */ |
71ec289e SW |
997 | case NL80211_CHAN_WIDTH_40: |
998 | sta_flags |= IEEE80211_STA_DISABLE_VHT; | |
33a45867 CYY |
999 | break; |
1000 | default: | |
1001 | break; | |
1002 | } | |
1003 | ||
1004 | memset(¶ms, 0, sizeof(params)); | |
21a8e9dd | 1005 | err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, |
33a45867 CYY |
1006 | sta_flags, sdata->vif.addr, |
1007 | &csa_ie); | |
1008 | if (err < 0) | |
1009 | return false; | |
1010 | if (err) | |
1011 | return false; | |
1012 | ||
5d55371b BB |
1013 | /* Mark the channel unavailable if the reason for the switch is |
1014 | * regulatory. | |
1015 | */ | |
1016 | if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) | |
1017 | ieee80211_mesh_csa_mark_radar(sdata); | |
1018 | ||
33a45867 CYY |
1019 | params.chandef = csa_ie.chandef; |
1020 | params.count = csa_ie.count; | |
1021 | ||
33a45867 | 1022 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
0ab2e55d BB |
1023 | IEEE80211_CHAN_DISABLED) || |
1024 | !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, | |
1025 | NL80211_IFTYPE_MESH_POINT)) { | |
33a45867 CYY |
1026 | sdata_info(sdata, |
1027 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1028 | sdata->vif.addr, | |
1029 | params.chandef.chan->center_freq, | |
1030 | params.chandef.width, | |
1031 | params.chandef.center_freq1, | |
1032 | params.chandef.center_freq2); | |
1033 | return false; | |
1034 | } | |
1035 | ||
1036 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
1037 | ¶ms.chandef, |
1038 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
1039 | if (err < 0) |
1040 | return false; | |
0ab2e55d BB |
1041 | if (err > 0 && !ifmsh->userspace_handles_dfs) { |
1042 | sdata_info(sdata, | |
1043 | "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1044 | sdata->vif.addr, | |
1045 | params.chandef.chan->center_freq, | |
1046 | params.chandef.width, | |
1047 | params.chandef.center_freq1, | |
1048 | params.chandef.center_freq2); | |
33a45867 | 1049 | return false; |
0ab2e55d | 1050 | } |
2beb6dab LC |
1051 | |
1052 | params.radar_required = err; | |
33a45867 | 1053 | |
0cb4d4dc LC |
1054 | if (cfg80211_chandef_identical(¶ms.chandef, |
1055 | &sdata->vif.bss_conf.chandef)) { | |
1056 | mcsa_dbg(sdata, | |
1057 | "received csa with an identical chandef, ignoring\n"); | |
1058 | return true; | |
1059 | } | |
33a45867 CYY |
1060 | |
1061 | mcsa_dbg(sdata, | |
1062 | "received channel switch announcement to go to channel %d MHz\n", | |
1063 | params.chandef.chan->center_freq); | |
1064 | ||
1065 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 1066 | if (beacon) { |
33a45867 | 1067 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
1068 | if (ifmsh->pre_value >= csa_ie.pre_value) |
1069 | return false; | |
1070 | ifmsh->pre_value = csa_ie.pre_value; | |
1071 | } | |
33a45867 | 1072 | |
0cb4d4dc | 1073 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 1074 | return false; |
33a45867 | 1075 | |
0cb4d4dc | 1076 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 1077 | |
0cb4d4dc LC |
1078 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
1079 | ¶ms) < 0) | |
1080 | return false; | |
33a45867 CYY |
1081 | |
1082 | return true; | |
33a45867 CYY |
1083 | } |
1084 | ||
9fb04b50 TP |
1085 | static void |
1086 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1087 | struct ieee80211_mgmt *mgmt, size_t len) | |
1088 | { | |
1089 | struct ieee80211_local *local = sdata->local; | |
1090 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1091 | struct sk_buff *presp; | |
1092 | struct beacon_data *bcn; | |
1093 | struct ieee80211_mgmt *hdr; | |
1094 | struct ieee802_11_elems elems; | |
1095 | size_t baselen; | |
511044ea | 1096 | u8 *pos; |
9fb04b50 | 1097 | |
9fb04b50 TP |
1098 | pos = mgmt->u.probe_req.variable; |
1099 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1100 | if (baselen > len) | |
1101 | return; | |
1102 | ||
b2e506bf | 1103 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 1104 | |
a4ef66a9 CYY |
1105 | if (!elems.mesh_id) |
1106 | return; | |
1107 | ||
9fb04b50 TP |
1108 | /* 802.11-2012 10.1.4.3.2 */ |
1109 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1110 | !is_broadcast_ether_addr(mgmt->da)) || | |
1111 | elems.ssid_len != 0) | |
1112 | return; | |
1113 | ||
1114 | if (elems.mesh_id_len != 0 && | |
1115 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
1116 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1117 | return; | |
1118 | ||
1119 | rcu_read_lock(); | |
1120 | bcn = rcu_dereference(ifmsh->beacon); | |
1121 | ||
1122 | if (!bcn) | |
1123 | goto out; | |
1124 | ||
1125 | presp = dev_alloc_skb(local->tx_headroom + | |
1126 | bcn->head_len + bcn->tail_len); | |
1127 | if (!presp) | |
1128 | goto out; | |
1129 | ||
1130 | skb_reserve(presp, local->tx_headroom); | |
59ae1d12 JB |
1131 | skb_put_data(presp, bcn->head, bcn->head_len); |
1132 | skb_put_data(presp, bcn->tail, bcn->tail_len); | |
9fb04b50 TP |
1133 | hdr = (struct ieee80211_mgmt *) presp->data; |
1134 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1135 | IEEE80211_STYPE_PROBE_RESP); | |
1136 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1137 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1138 | ieee80211_tx_skb(sdata, presp); | |
1139 | out: | |
1140 | rcu_read_unlock(); | |
1141 | } | |
1142 | ||
472dbc45 JB |
1143 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1144 | u16 stype, | |
1145 | struct ieee80211_mgmt *mgmt, | |
1146 | size_t len, | |
1147 | struct ieee80211_rx_status *rx_status) | |
1148 | { | |
c6a1fa12 | 1149 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1150 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1151 | struct ieee802_11_elems elems; |
1152 | struct ieee80211_channel *channel; | |
472dbc45 JB |
1153 | size_t baselen; |
1154 | int freq; | |
57fbcce3 | 1155 | enum nl80211_band band = rx_status->band; |
472dbc45 JB |
1156 | |
1157 | /* ignore ProbeResp to foreign address */ | |
1158 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1159 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1160 | return; |
1161 | ||
1162 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1163 | if (baselen > len) | |
1164 | return; | |
1165 | ||
1166 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1167 | false, &elems); |
472dbc45 | 1168 | |
9a90bc81 TP |
1169 | /* ignore non-mesh or secure / unsecure mismatch */ |
1170 | if ((!elems.mesh_id || !elems.mesh_config) || | |
1171 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1172 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
1173 | return; |
1174 | ||
1cd8e88e | 1175 | if (elems.ds_params) |
59eb21a6 | 1176 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
1177 | else |
1178 | freq = rx_status->freq; | |
1179 | ||
1180 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1181 | ||
1182 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1183 | return; | |
1184 | ||
ed92a9b5 MH |
1185 | if (mesh_matches_local(sdata, &elems)) { |
1186 | mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", | |
1187 | sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); | |
1188 | if (!sdata->u.mesh.user_mpm || | |
1189 | sdata->u.mesh.mshcfg.rssi_threshold == 0 || | |
1190 | sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) | |
1191 | mesh_neighbour_update(sdata, mgmt->sa, &elems); | |
1192 | } | |
dbf498fb JC |
1193 | |
1194 | if (ifmsh->sync_ops) | |
1195 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
1196 | stype, mgmt, &elems, rx_status); | |
33a45867 | 1197 | |
0cb4d4dc LC |
1198 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && |
1199 | !sdata->vif.csa_active) | |
33a45867 | 1200 | ieee80211_mesh_process_chnswitch(sdata, &elems, true); |
472dbc45 JB |
1201 | } |
1202 | ||
b8456a14 CYY |
1203 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1204 | { | |
1205 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1206 | struct mesh_csa_settings *tmp_csa_settings; | |
1207 | int ret = 0; | |
faf046e7 | 1208 | int changed = 0; |
b8456a14 CYY |
1209 | |
1210 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1211 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1212 | ifmsh->chsw_ttl = 0; |
1213 | ||
1214 | /* Remove the CSA and MCSP elements from the beacon */ | |
1215 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1216 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1217 | if (tmp_csa_settings) |
1218 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1219 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1220 | if (ret) | |
1221 | return -EINVAL; | |
1222 | ||
faf046e7 | 1223 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1224 | |
1225 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1226 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1227 | return changed; |
b8456a14 CYY |
1228 | } |
1229 | ||
1230 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1231 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1232 | { |
1233 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1234 | struct mesh_csa_settings *tmp_csa_settings; | |
1235 | int ret = 0; | |
1236 | ||
1237 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), | |
1238 | GFP_ATOMIC); | |
1239 | if (!tmp_csa_settings) | |
1240 | return -ENOMEM; | |
1241 | ||
1242 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1243 | sizeof(struct cfg80211_csa_settings)); | |
1244 | ||
1245 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1246 | ||
1247 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1248 | if (ret) { | |
1249 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1250 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1251 | kfree_rcu(tmp_csa_settings, rcu_head); |
1252 | return ret; | |
1253 | } | |
1254 | ||
b58e81e9 | 1255 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1256 | } |
1257 | ||
8f2535b9 | 1258 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
c4de37ee PO |
1259 | struct ieee80211_mgmt *mgmt, size_t len, |
1260 | struct ieee802_11_elems *elems) | |
8f2535b9 CYY |
1261 | { |
1262 | struct ieee80211_mgmt *mgmt_fwd; | |
1263 | struct sk_buff *skb; | |
1264 | struct ieee80211_local *local = sdata->local; | |
8f2535b9 CYY |
1265 | |
1266 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1267 | if (!skb) | |
1268 | return -ENOMEM; | |
1269 | skb_reserve(skb, local->tx_headroom); | |
4df864c1 | 1270 | mgmt_fwd = skb_put(skb, len); |
8f2535b9 | 1271 | |
c4de37ee PO |
1272 | elems->mesh_chansw_params_ie->mesh_ttl--; |
1273 | elems->mesh_chansw_params_ie->mesh_flags &= | |
1274 | ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
8f2535b9 CYY |
1275 | |
1276 | memcpy(mgmt_fwd, mgmt, len); | |
1277 | eth_broadcast_addr(mgmt_fwd->da); | |
1278 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1279 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1280 | ||
1281 | ieee80211_tx_skb(sdata, skb); | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1286 | struct ieee80211_mgmt *mgmt, size_t len) | |
1287 | { | |
1288 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1289 | struct ieee802_11_elems elems; | |
1290 | u16 pre_value; | |
33a45867 | 1291 | bool fwd_csa = true; |
8f2535b9 | 1292 | size_t baselen; |
3f718fd8 | 1293 | u8 *pos; |
8f2535b9 CYY |
1294 | |
1295 | if (mgmt->u.action.u.measurement.action_code != | |
1296 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1297 | return; | |
1298 | ||
1299 | pos = mgmt->u.action.u.chan_switch.variable; | |
1300 | baselen = offsetof(struct ieee80211_mgmt, | |
1301 | u.action.u.chan_switch.variable); | |
3b23782f | 1302 | ieee802_11_parse_elems(pos, len - baselen, true, &elems); |
8f2535b9 | 1303 | |
3f718fd8 CYY |
1304 | ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; |
1305 | if (!--ifmsh->chsw_ttl) | |
8f2535b9 CYY |
1306 | fwd_csa = false; |
1307 | ||
1308 | pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); | |
1309 | if (ifmsh->pre_value >= pre_value) | |
1310 | return; | |
1311 | ||
1312 | ifmsh->pre_value = pre_value; | |
1313 | ||
0cb4d4dc LC |
1314 | if (!sdata->vif.csa_active && |
1315 | !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { | |
33a45867 CYY |
1316 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
1317 | return; | |
1318 | } | |
1319 | ||
8f2535b9 CYY |
1320 | /* forward or re-broadcast the CSA frame */ |
1321 | if (fwd_csa) { | |
c4de37ee | 1322 | if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0) |
8f2535b9 CYY |
1323 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); |
1324 | } | |
8f2535b9 CYY |
1325 | } |
1326 | ||
472dbc45 JB |
1327 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1328 | struct ieee80211_mgmt *mgmt, | |
1329 | size_t len, | |
1330 | struct ieee80211_rx_status *rx_status) | |
1331 | { | |
1332 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1333 | case WLAN_CATEGORY_SELF_PROTECTED: |
1334 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1335 | case WLAN_SP_MESH_PEERING_OPEN: | |
1336 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1337 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1338 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1339 | break; | |
1340 | } | |
472dbc45 | 1341 | break; |
25d49e4d TP |
1342 | case WLAN_CATEGORY_MESH_ACTION: |
1343 | if (mesh_action_is_path_sel(mgmt)) | |
1344 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1345 | break; |
8f2535b9 CYY |
1346 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1347 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1348 | break; | |
472dbc45 JB |
1349 | } |
1350 | } | |
1351 | ||
1fa57d01 JB |
1352 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1353 | struct sk_buff *skb) | |
472dbc45 JB |
1354 | { |
1355 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1356 | struct ieee80211_mgmt *mgmt; |
1357 | u16 stype; | |
1358 | ||
ecccd072 TP |
1359 | sdata_lock(sdata); |
1360 | ||
1361 | /* mesh already went down */ | |
1693d344 | 1362 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1363 | goto out; |
1364 | ||
f1d58c25 | 1365 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1366 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1367 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1368 | ||
1369 | switch (stype) { | |
1370 | case IEEE80211_STYPE_PROBE_RESP: | |
1371 | case IEEE80211_STYPE_BEACON: | |
1372 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1373 | rx_status); | |
1374 | break; | |
9fb04b50 TP |
1375 | case IEEE80211_STYPE_PROBE_REQ: |
1376 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1377 | break; | |
472dbc45 JB |
1378 | case IEEE80211_STYPE_ACTION: |
1379 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1380 | break; | |
1381 | } | |
ecccd072 TP |
1382 | out: |
1383 | sdata_unlock(sdata); | |
472dbc45 JB |
1384 | } |
1385 | ||
f81a9ded TP |
1386 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1387 | { | |
1388 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1389 | u32 bit, changed = 0; | |
1390 | ||
1391 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1392 | sizeof(changed) * BITS_PER_BYTE) { | |
1393 | clear_bit(bit, &ifmsh->mbss_changed); | |
1394 | changed |= BIT(bit); | |
1395 | } | |
1396 | ||
1397 | if (sdata->vif.bss_conf.enable_beacon && | |
1398 | (changed & (BSS_CHANGED_BEACON | | |
1399 | BSS_CHANGED_HT | | |
1400 | BSS_CHANGED_BASIC_RATES | | |
1401 | BSS_CHANGED_BEACON_INT))) | |
1402 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1403 | return; | |
1404 | ||
1405 | ieee80211_bss_info_change_notify(sdata, changed); | |
1406 | } | |
1407 | ||
1fa57d01 | 1408 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1409 | { |
472dbc45 | 1410 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1411 | |
ecccd072 TP |
1412 | sdata_lock(sdata); |
1413 | ||
1414 | /* mesh already went down */ | |
1693d344 | 1415 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1416 | goto out; |
1417 | ||
472dbc45 JB |
1418 | if (ifmsh->preq_queue_len && |
1419 | time_after(jiffies, | |
1420 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1421 | mesh_path_start_discovery(sdata); | |
1422 | ||
18889231 | 1423 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
bf7cd94d | 1424 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1425 | |
1426 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1427 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1428 | |
1429 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
445cd452 | 1430 | mesh_sync_adjust_tsf(sdata); |
ecccd072 | 1431 | |
f81a9ded TP |
1432 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1433 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1434 | out: |
1435 | sdata_unlock(sdata); | |
472dbc45 JB |
1436 | } |
1437 | ||
472dbc45 | 1438 | |
902acc78 JB |
1439 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1440 | { | |
472dbc45 | 1441 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1442 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1443 | |
34f11cd3 KC |
1444 | timer_setup(&ifmsh->housekeeping_timer, |
1445 | ieee80211_mesh_housekeeping_timer, 0); | |
472dbc45 | 1446 | |
472dbc45 | 1447 | ifmsh->accepting_plinks = true; |
472dbc45 | 1448 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1449 | mesh_rmc_init(sdata); |
472dbc45 | 1450 | ifmsh->last_preq = jiffies; |
dca7e943 | 1451 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1452 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1453 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1454 | if (!mesh_allocated) | |
1455 | ieee80211s_init(); | |
2bdaf386 BC |
1456 | |
1457 | mesh_pathtbl_init(sdata); | |
1458 | ||
34f11cd3 KC |
1459 | timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); |
1460 | timer_setup(&ifmsh->mesh_path_root_timer, | |
1461 | ieee80211_mesh_path_root_timer, 0); | |
472dbc45 | 1462 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1463 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1464 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1465 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1466 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1467 | |
1468 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1469 | } |
0371a08f BC |
1470 | |
1471 | void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) | |
1472 | { | |
1473 | mesh_rmc_free(sdata); | |
1474 | mesh_pathtbl_unregister(sdata); | |
1475 | } |