Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2e3c8736 | 2 | /* |
264d9b7d | 3 | * Copyright (c) 2008, 2009 open80211s Ltd. |
d0a9123e | 4 | * Copyright (C) 2018 - 2022 Intel Corporation |
2e3c8736 LCC |
5 | * Authors: Luis Carlos Cobo <luisca@cozybit.com> |
6 | * Javier Cardona <javier@cozybit.com> | |
2e3c8736 LCC |
7 | */ |
8 | ||
5a0e3ad6 | 9 | #include <linux/slab.h> |
51ceddad | 10 | #include <asm/unaligned.h> |
2e3c8736 LCC |
11 | #include "ieee80211_i.h" |
12 | #include "mesh.h" | |
b8456a14 | 13 | #include "driver-ops.h" |
2e3c8736 | 14 | |
bf7cd94d | 15 | static int mesh_allocated; |
2e3c8736 LCC |
16 | static struct kmem_cache *rm_cache; |
17 | ||
25d49e4d TP |
18 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
19 | { | |
20 | return (mgmt->u.action.u.mesh_action.action_code == | |
21 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
22 | } | |
25d49e4d | 23 | |
2e3c8736 LCC |
24 | void ieee80211s_init(void) |
25 | { | |
2e3c8736 LCC |
26 | mesh_allocated = 1; |
27 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
28 | 0, 0, NULL); | |
29 | } | |
30 | ||
31 | void ieee80211s_stop(void) | |
32 | { | |
bf7cd94d JB |
33 | if (!mesh_allocated) |
34 | return; | |
2e3c8736 LCC |
35 | kmem_cache_destroy(rm_cache); |
36 | } | |
37 | ||
34f11cd3 | 38 | static void ieee80211_mesh_housekeeping_timer(struct timer_list *t) |
472dbc45 | 39 | { |
34f11cd3 KC |
40 | struct ieee80211_sub_if_data *sdata = |
41 | from_timer(sdata, t, u.mesh.housekeeping_timer); | |
472dbc45 JB |
42 | struct ieee80211_local *local = sdata->local; |
43 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
44 | ||
6b9ac442 | 45 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 46 | |
64592c8f | 47 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
48 | } |
49 | ||
2e3c8736 LCC |
50 | /** |
51 | * mesh_matches_local - check if the config of a mesh point matches ours | |
52 | * | |
f698d856 | 53 | * @sdata: local mesh subif |
f743ff49 | 54 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
55 | * |
56 | * This function checks if the mesh configuration of a mesh point matches the | |
57 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
58 | */ | |
f743ff49 TP |
59 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
60 | struct ieee802_11_elems *ie) | |
2e3c8736 | 61 | { |
472dbc45 | 62 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
f743ff49 | 63 | u32 basic_rates = 0; |
4bf88530 | 64 | struct cfg80211_chan_def sta_chan_def; |
21a8e9dd | 65 | struct ieee80211_supported_band *sband; |
2a333a0d | 66 | u32 vht_cap_info = 0; |
2e3c8736 | 67 | |
2e3c8736 LCC |
68 | /* |
69 | * As support for each feature is added, check for matching | |
70 | * - On mesh config capabilities | |
71 | * - Power Save Support En | |
72 | * - Sync support enabled | |
73 | * - Sync support active | |
74 | * - Sync support required from peer | |
75 | * - MDA enabled | |
76 | * - Power management control on fc | |
77 | */ | |
739522ba TP |
78 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
79 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
80 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
81 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
82 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
83 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
84 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 85 | return false; |
739522ba | 86 | |
21a8e9dd MSS |
87 | sband = ieee80211_get_sband(sdata); |
88 | if (!sband) | |
89 | return false; | |
90 | ||
91 | ieee80211_sta_get_rates(sdata, ie, sband->band, | |
f743ff49 TP |
92 | &basic_rates); |
93 | ||
fe40cb62 | 94 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 95 | return false; |
fe40cb62 | 96 | |
8ac3c704 JB |
97 | cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, |
98 | NL80211_CHAN_NO_HT); | |
99 | ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); | |
2a333a0d JB |
100 | |
101 | if (ie->vht_cap_elem) | |
102 | vht_cap_info = le32_to_cpu(ie->vht_cap_elem->vht_cap_info); | |
103 | ||
104 | ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, | |
7eb26df2 JB |
105 | ie->vht_operation, ie->ht_operation, |
106 | &sta_chan_def); | |
5dca295d IP |
107 | ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, NULL, |
108 | &sta_chan_def); | |
c85fb53c | 109 | |
4bf88530 JB |
110 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
111 | &sta_chan_def)) | |
bf7cd94d | 112 | return false; |
2e3c8736 | 113 | |
739522ba | 114 | return true; |
2e3c8736 LCC |
115 | } |
116 | ||
117 | /** | |
118 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
119 | * | |
120 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 121 | */ |
f698d856 | 122 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 123 | { |
136cfa28 | 124 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 125 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
126 | } |
127 | ||
128 | /** | |
2c53040f | 129 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 130 | * |
d0709a65 | 131 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
132 | * |
133 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 134 | */ |
df323818 | 135 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 136 | { |
2e3c8736 | 137 | bool free_plinks; |
df323818 | 138 | u32 changed = 0; |
2e3c8736 LCC |
139 | |
140 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
141 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
142 | * are already on the table but are not on PLINK_ESTAB state. However, |
143 | * in general the mesh interface is not accepting peer link requests | |
144 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
145 | */ |
146 | free_plinks = mesh_plink_availables(sdata); | |
147 | ||
df323818 MP |
148 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
149 | sdata->u.mesh.accepting_plinks = free_plinks; | |
150 | changed = BSS_CHANGED_BEACON; | |
151 | } | |
152 | ||
153 | return changed; | |
2e3c8736 LCC |
154 | } |
155 | ||
45b5028e TP |
156 | /* |
157 | * mesh_sta_cleanup - clean up any mesh sta state | |
158 | * | |
159 | * @sta: mesh sta to clean up. | |
160 | */ | |
161 | void mesh_sta_cleanup(struct sta_info *sta) | |
162 | { | |
163 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
efc401f4 | 164 | u32 changed = mesh_plink_deactivate(sta); |
fe7a7c57 | 165 | |
f81a9ded | 166 | if (changed) |
2b5e1967 | 167 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
168 | } |
169 | ||
f698d856 | 170 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 171 | { |
2e3c8736 LCC |
172 | int i; |
173 | ||
472dbc45 JB |
174 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
175 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 176 | return -ENOMEM; |
472dbc45 | 177 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 178 | for (i = 0; i < RMC_BUCKETS; i++) |
47a0489c | 179 | INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
180 | return 0; |
181 | } | |
182 | ||
f698d856 | 183 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 184 | { |
472dbc45 | 185 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
47a0489c BC |
186 | struct rmc_entry *p; |
187 | struct hlist_node *n; | |
2e3c8736 LCC |
188 | int i; |
189 | ||
472dbc45 | 190 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
191 | return; |
192 | ||
bf7cd94d | 193 | for (i = 0; i < RMC_BUCKETS; i++) { |
47a0489c BC |
194 | hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
195 | hlist_del(&p->list); | |
2e3c8736 LCC |
196 | kmem_cache_free(rm_cache, p); |
197 | } | |
bf7cd94d | 198 | } |
2e3c8736 LCC |
199 | |
200 | kfree(rmc); | |
472dbc45 | 201 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
202 | } |
203 | ||
204 | /** | |
205 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
206 | * | |
bf7cd94d | 207 | * @sdata: interface |
2e3c8736 LCC |
208 | * @sa: source address |
209 | * @mesh_hdr: mesh_header | |
210 | * | |
211 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
212 | * | |
213 | * Checks using the source address and the mesh sequence number if we have | |
214 | * received this frame lately. If the frame is not in the cache, it is added to | |
215 | * it. | |
216 | */ | |
bf7cd94d JB |
217 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
218 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 219 | { |
472dbc45 | 220 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
221 | u32 seqnum = 0; |
222 | int entries = 0; | |
223 | u8 idx; | |
47a0489c BC |
224 | struct rmc_entry *p; |
225 | struct hlist_node *n; | |
2e3c8736 | 226 | |
0aa7fabb BC |
227 | if (!rmc) |
228 | return -1; | |
229 | ||
2e3c8736 | 230 | /* Don't care about endianness since only match matters */ |
51ceddad LCC |
231 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
232 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
47a0489c | 233 | hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
234 | ++entries; |
235 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 236 | entries == RMC_QUEUE_MAX_LEN) { |
47a0489c | 237 | hlist_del(&p->list); |
2e3c8736 LCC |
238 | kmem_cache_free(rm_cache, p); |
239 | --entries; | |
bf7cd94d | 240 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
241 | return -1; |
242 | } | |
243 | ||
244 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 245 | if (!p) |
2e3c8736 | 246 | return 0; |
d15b8459 | 247 | |
2e3c8736 LCC |
248 | p->seqnum = seqnum; |
249 | p->exp_time = jiffies + RMC_TIMEOUT; | |
250 | memcpy(p->sa, sa, ETH_ALEN); | |
47a0489c | 251 | hlist_add_head(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
252 | return 0; |
253 | } | |
254 | ||
bf7cd94d JB |
255 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
256 | struct sk_buff *skb) | |
082ebb0c TP |
257 | { |
258 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
259 | u8 *pos, neighbors; | |
260 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
4a6ecd35 | 261 | bool is_connected_to_gate = ifmsh->num_gates > 0 || |
01d66fbd BC |
262 | ifmsh->mshcfg.dot11MeshGateAnnouncementProtocol || |
263 | ifmsh->mshcfg.dot11MeshConnectedToMeshGate; | |
184eebe6 | 264 | bool is_connected_to_as = ifmsh->mshcfg.dot11MeshConnectedToAuthServer; |
082ebb0c TP |
265 | |
266 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
267 | return -ENOMEM; | |
268 | ||
269 | pos = skb_put(skb, 2 + meshconf_len); | |
270 | *pos++ = WLAN_EID_MESH_CONFIG; | |
271 | *pos++ = meshconf_len; | |
272 | ||
43552be1 TP |
273 | /* save a pointer for quick updates in pre-tbtt */ |
274 | ifmsh->meshconf_offset = pos - skb->data; | |
275 | ||
082ebb0c TP |
276 | /* Active path selection protocol ID */ |
277 | *pos++ = ifmsh->mesh_pp_id; | |
278 | /* Active path selection metric ID */ | |
279 | *pos++ = ifmsh->mesh_pm_id; | |
280 | /* Congestion control mode identifier */ | |
281 | *pos++ = ifmsh->mesh_cc_id; | |
282 | /* Synchronization protocol identifier */ | |
283 | *pos++ = ifmsh->mesh_sp_id; | |
284 | /* Authentication Protocol identifier */ | |
285 | *pos++ = ifmsh->mesh_auth_id; | |
286 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 287 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 288 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
184eebe6 MT |
289 | *pos++ = (is_connected_to_as << 7) | |
290 | (neighbors << 1) | | |
291 | is_connected_to_gate; | |
082ebb0c | 292 | /* Mesh capability */ |
b60e527a CYY |
293 | *pos = 0x00; |
294 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
295 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 296 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 297 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
298 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
299 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 300 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
082ebb0c TP |
301 | return 0; |
302 | } | |
303 | ||
bf7cd94d | 304 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
305 | { |
306 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
307 | u8 *pos; | |
308 | ||
309 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
310 | return -ENOMEM; | |
311 | ||
312 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
313 | *pos++ = WLAN_EID_MESH_ID; | |
314 | *pos++ = ifmsh->mesh_id_len; | |
315 | if (ifmsh->mesh_id_len) | |
316 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
bf7cd94d JB |
321 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
322 | struct sk_buff *skb) | |
3f52b7e3 MP |
323 | { |
324 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
325 | u8 *pos; | |
326 | ||
327 | /* see IEEE802.11-2012 13.14.6 */ | |
328 | if (ifmsh->ps_peers_light_sleep == 0 && | |
329 | ifmsh->ps_peers_deep_sleep == 0 && | |
330 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
331 | return 0; | |
332 | ||
333 | if (skb_tailroom(skb) < 4) | |
334 | return -ENOMEM; | |
335 | ||
336 | pos = skb_put(skb, 2 + 2); | |
337 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
338 | *pos++ = 2; | |
339 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
bf7cd94d JB |
344 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
345 | struct sk_buff *skb) | |
082ebb0c TP |
346 | { |
347 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
348 | u8 offset, len; | |
349 | const u8 *data; | |
350 | ||
351 | if (!ifmsh->ie || !ifmsh->ie_len) | |
352 | return 0; | |
353 | ||
354 | /* fast-forward to vendor IEs */ | |
355 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
356 | ||
da7061c8 | 357 | if (offset < ifmsh->ie_len) { |
082ebb0c TP |
358 | len = ifmsh->ie_len - offset; |
359 | data = ifmsh->ie + offset; | |
360 | if (skb_tailroom(skb) < len) | |
361 | return -ENOMEM; | |
59ae1d12 | 362 | skb_put_data(skb, data, len); |
082ebb0c TP |
363 | } |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
bf7cd94d | 368 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
369 | { |
370 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
371 | u8 len = 0; | |
372 | const u8 *data; | |
373 | ||
374 | if (!ifmsh->ie || !ifmsh->ie_len) | |
375 | return 0; | |
376 | ||
377 | /* find RSN IE */ | |
a40a8c17 BC |
378 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
379 | if (!data) | |
380 | return 0; | |
082ebb0c | 381 | |
a40a8c17 BC |
382 | len = data[1] + 2; |
383 | ||
384 | if (skb_tailroom(skb) < len) | |
385 | return -ENOMEM; | |
59ae1d12 | 386 | skb_put_data(skb, data, len); |
082ebb0c TP |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
bf7cd94d JB |
391 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
392 | struct sk_buff *skb) | |
082ebb0c | 393 | { |
55de908a JB |
394 | struct ieee80211_chanctx_conf *chanctx_conf; |
395 | struct ieee80211_channel *chan; | |
082ebb0c | 396 | u8 *pos; |
2e3c8736 | 397 | |
082ebb0c TP |
398 | if (skb_tailroom(skb) < 3) |
399 | return -ENOMEM; | |
400 | ||
55de908a | 401 | rcu_read_lock(); |
d0a9123e | 402 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
403 | if (WARN_ON(!chanctx_conf)) { |
404 | rcu_read_unlock(); | |
405 | return -EINVAL; | |
406 | } | |
4bf88530 | 407 | chan = chanctx_conf->def.chan; |
55de908a JB |
408 | rcu_read_unlock(); |
409 | ||
601513aa ET |
410 | pos = skb_put(skb, 2 + 1); |
411 | *pos++ = WLAN_EID_DS_PARAMS; | |
412 | *pos++ = 1; | |
413 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 414 | |
082ebb0c | 415 | return 0; |
2e3c8736 LCC |
416 | } |
417 | ||
bf7cd94d JB |
418 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
419 | struct sk_buff *skb) | |
176f3608 | 420 | { |
176f3608 TP |
421 | struct ieee80211_supported_band *sband; |
422 | u8 *pos; | |
423 | ||
21a8e9dd MSS |
424 | sband = ieee80211_get_sband(sdata); |
425 | if (!sband) | |
426 | return -EINVAL; | |
427 | ||
607ca9ea RM |
428 | /* HT not allowed in 6 GHz */ |
429 | if (sband->band == NL80211_BAND_6GHZ) | |
430 | return 0; | |
431 | ||
176f3608 | 432 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
433 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
434 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
435 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
436 | return 0; |
437 | ||
438 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
439 | return -ENOMEM; | |
440 | ||
441 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 442 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
443 | |
444 | return 0; | |
445 | } | |
446 | ||
bf7cd94d JB |
447 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
448 | struct sk_buff *skb) | |
176f3608 TP |
449 | { |
450 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
451 | struct ieee80211_chanctx_conf *chanctx_conf; |
452 | struct ieee80211_channel *channel; | |
55de908a JB |
453 | struct ieee80211_supported_band *sband; |
454 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
455 | u8 *pos; |
456 | ||
55de908a | 457 | rcu_read_lock(); |
d0a9123e | 458 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
55de908a JB |
459 | if (WARN_ON(!chanctx_conf)) { |
460 | rcu_read_unlock(); | |
461 | return -EINVAL; | |
462 | } | |
4bf88530 | 463 | channel = chanctx_conf->def.chan; |
55de908a JB |
464 | rcu_read_unlock(); |
465 | ||
466 | sband = local->hw.wiphy->bands[channel->band]; | |
467 | ht_cap = &sband->ht_cap; | |
468 | ||
607ca9ea RM |
469 | /* HT not allowed in 6 GHz */ |
470 | if (sband->band == NL80211_BAND_6GHZ) | |
471 | return 0; | |
472 | ||
c85fb53c BC |
473 | if (!ht_cap->ht_supported || |
474 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
475 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
476 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
477 | return 0; |
478 | ||
074d46d1 | 479 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
480 | return -ENOMEM; |
481 | ||
074d46d1 | 482 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 483 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
484 | sdata->vif.bss_conf.ht_operation_mode, |
485 | false); | |
176f3608 TP |
486 | |
487 | return 0; | |
488 | } | |
bf7cd94d | 489 | |
c85fb53c BC |
490 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
491 | struct sk_buff *skb) | |
492 | { | |
c85fb53c BC |
493 | struct ieee80211_supported_band *sband; |
494 | u8 *pos; | |
495 | ||
21a8e9dd MSS |
496 | sband = ieee80211_get_sband(sdata); |
497 | if (!sband) | |
498 | return -EINVAL; | |
499 | ||
607ca9ea RM |
500 | /* VHT not allowed in 6 GHz */ |
501 | if (sband->band == NL80211_BAND_6GHZ) | |
502 | return 0; | |
503 | ||
c85fb53c BC |
504 | if (!sband->vht_cap.vht_supported || |
505 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
506 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
507 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
508 | return 0; | |
509 | ||
510 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
511 | return -ENOMEM; | |
512 | ||
513 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
514 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
520 | struct sk_buff *skb) | |
521 | { | |
522 | struct ieee80211_local *local = sdata->local; | |
523 | struct ieee80211_chanctx_conf *chanctx_conf; | |
524 | struct ieee80211_channel *channel; | |
525 | struct ieee80211_supported_band *sband; | |
526 | struct ieee80211_sta_vht_cap *vht_cap; | |
527 | u8 *pos; | |
528 | ||
529 | rcu_read_lock(); | |
d0a9123e | 530 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
c85fb53c BC |
531 | if (WARN_ON(!chanctx_conf)) { |
532 | rcu_read_unlock(); | |
533 | return -EINVAL; | |
534 | } | |
535 | channel = chanctx_conf->def.chan; | |
536 | rcu_read_unlock(); | |
537 | ||
538 | sband = local->hw.wiphy->bands[channel->band]; | |
539 | vht_cap = &sband->vht_cap; | |
540 | ||
607ca9ea RM |
541 | /* VHT not allowed in 6 GHz */ |
542 | if (sband->band == NL80211_BAND_6GHZ) | |
543 | return 0; | |
544 | ||
c85fb53c BC |
545 | if (!vht_cap->vht_supported || |
546 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
547 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
548 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
549 | return 0; | |
550 | ||
551 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
552 | return -ENOMEM; | |
553 | ||
554 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
555 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
556 | &sdata->vif.bss_conf.chandef); | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
60ad72da SE |
561 | int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata, |
562 | struct sk_buff *skb, u8 ie_len) | |
563 | { | |
564 | const struct ieee80211_sta_he_cap *he_cap; | |
565 | struct ieee80211_supported_band *sband; | |
566 | u8 *pos; | |
567 | ||
568 | sband = ieee80211_get_sband(sdata); | |
569 | if (!sband) | |
570 | return -EINVAL; | |
571 | ||
572 | he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); | |
573 | ||
574 | if (!he_cap || | |
575 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
576 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
577 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
578 | return 0; | |
579 | ||
580 | if (skb_tailroom(skb) < ie_len) | |
581 | return -ENOMEM; | |
582 | ||
583 | pos = skb_put(skb, ie_len); | |
1f2c1044 | 584 | ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len); |
60ad72da SE |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
589 | int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata, | |
590 | struct sk_buff *skb) | |
591 | { | |
592 | const struct ieee80211_sta_he_cap *he_cap; | |
593 | struct ieee80211_supported_band *sband; | |
d1b7524b | 594 | u32 len; |
60ad72da SE |
595 | u8 *pos; |
596 | ||
597 | sband = ieee80211_get_sband(sdata); | |
598 | if (!sband) | |
599 | return -EINVAL; | |
600 | ||
601 | he_cap = ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT); | |
602 | if (!he_cap || | |
603 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
604 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
605 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
606 | return 0; | |
607 | ||
d1b7524b RM |
608 | len = 2 + 1 + sizeof(struct ieee80211_he_operation); |
609 | if (sdata->vif.bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) | |
610 | len += sizeof(struct ieee80211_he_6ghz_oper); | |
611 | ||
612 | if (skb_tailroom(skb) < len) | |
60ad72da SE |
613 | return -ENOMEM; |
614 | ||
d1b7524b RM |
615 | pos = skb_put(skb, len); |
616 | ieee80211_ie_build_he_oper(pos, &sdata->vif.bss_conf.chandef); | |
60ad72da SE |
617 | |
618 | return 0; | |
619 | } | |
620 | ||
24a2042c RM |
621 | int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata, |
622 | struct sk_buff *skb) | |
623 | { | |
65ad3ef9 RM |
624 | struct ieee80211_supported_band *sband; |
625 | const struct ieee80211_sband_iftype_data *iftd; | |
626 | ||
627 | sband = ieee80211_get_sband(sdata); | |
628 | if (!sband) | |
629 | return -EINVAL; | |
630 | ||
631 | iftd = ieee80211_get_sband_iftype_data(sband, | |
632 | NL80211_IFTYPE_MESH_POINT); | |
633 | /* The device doesn't support HE in mesh mode or at all */ | |
634 | if (!iftd) | |
635 | return 0; | |
636 | ||
abd27d06 | 637 | ieee80211_ie_build_he_6ghz_cap(sdata, sdata->deflink.smps_mode, skb); |
24a2042c RM |
638 | return 0; |
639 | } | |
640 | ||
34f11cd3 | 641 | static void ieee80211_mesh_path_timer(struct timer_list *t) |
2e3c8736 LCC |
642 | { |
643 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 644 | from_timer(sdata, t, u.mesh.mesh_path_timer); |
5bb644a0 | 645 | |
690205f1 | 646 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
647 | } |
648 | ||
34f11cd3 | 649 | static void ieee80211_mesh_path_root_timer(struct timer_list *t) |
e304bfd3 RP |
650 | { |
651 | struct ieee80211_sub_if_data *sdata = | |
34f11cd3 | 652 | from_timer(sdata, t, u.mesh.mesh_path_root_timer); |
e304bfd3 | 653 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
e304bfd3 RP |
654 | |
655 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
656 | ||
690205f1 | 657 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
658 | } |
659 | ||
63c5723b RP |
660 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
661 | { | |
dbb912cd | 662 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
663 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
664 | else { | |
665 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
666 | /* stop running timer */ | |
667 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
668 | } | |
669 | } | |
670 | ||
70debba3 PKC |
671 | static void |
672 | ieee80211_mesh_update_bss_params(struct ieee80211_sub_if_data *sdata, | |
673 | u8 *ie, u8 ie_len) | |
674 | { | |
675 | struct ieee80211_supported_band *sband; | |
636707e5 | 676 | const struct element *cap; |
70debba3 PKC |
677 | const struct ieee80211_he_operation *he_oper = NULL; |
678 | ||
679 | sband = ieee80211_get_sband(sdata); | |
680 | if (!sband) | |
681 | return; | |
682 | ||
683 | if (!ieee80211_get_he_iftype_cap(sband, NL80211_IFTYPE_MESH_POINT) || | |
684 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
685 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
686 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
687 | return; | |
688 | ||
689 | sdata->vif.bss_conf.he_support = true; | |
690 | ||
636707e5 JB |
691 | cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ie_len); |
692 | if (cap && cap->datalen >= 1 + sizeof(*he_oper) && | |
693 | cap->datalen >= 1 + ieee80211_he_oper_size(cap->data + 1)) | |
694 | he_oper = (void *)(cap->data + 1); | |
70debba3 PKC |
695 | |
696 | if (he_oper) | |
697 | sdata->vif.bss_conf.he_oper.params = | |
698 | __le32_to_cpu(he_oper->he_oper_params); | |
699 | } | |
700 | ||
3c5772a5 JC |
701 | /** |
702 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 703 | * @hdr: 802.11 frame header |
3c5772a5 JC |
704 | * @fc: frame control field |
705 | * @meshda: destination address in the mesh | |
13880a3b | 706 | * @meshsa: source address in the mesh. Same as TA, as frame is |
3c5772a5 JC |
707 | * locally originated. |
708 | * | |
709 | * Return the length of the 802.11 (does not include a mesh control header) | |
710 | */ | |
15ff6365 JB |
711 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
712 | const u8 *meshda, const u8 *meshsa) | |
713 | { | |
3c5772a5 JC |
714 | if (is_multicast_ether_addr(meshda)) { |
715 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
716 | /* DA TA SA */ | |
717 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
718 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
719 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
720 | return 24; | |
721 | } else { | |
2154c81c | 722 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 723 | /* RA TA DA SA */ |
c84a67a2 | 724 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
725 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
726 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
727 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
728 | return 30; | |
729 | } | |
730 | } | |
731 | ||
902acc78 JB |
732 | /** |
733 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 734 | * @sdata: mesh interface to be used |
bf7cd94d | 735 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
736 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
737 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
738 | * be NULL. | |
739 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
740 | * mesh frame | |
902acc78 JB |
741 | * |
742 | * Return the header length. | |
743 | */ | |
5edfcee5 AH |
744 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
745 | struct ieee80211s_hdr *meshhdr, | |
746 | const char *addr4or5, const char *addr6) | |
902acc78 | 747 | { |
bf7cd94d JB |
748 | if (WARN_ON(!addr4or5 && addr6)) |
749 | return 0; | |
750 | ||
0c3cee72 | 751 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 752 | |
472dbc45 | 753 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
754 | |
755 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
756 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
757 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 758 | |
61ad5394 | 759 | if (addr4or5 && !addr6) { |
3c5772a5 | 760 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 761 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 762 | return 2 * ETH_ALEN; |
61ad5394 | 763 | } else if (addr4or5 && addr6) { |
3c5772a5 | 764 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
765 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
766 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 767 | return 3 * ETH_ALEN; |
3c5772a5 | 768 | } |
bf7cd94d JB |
769 | |
770 | return ETH_ALEN; | |
902acc78 JB |
771 | } |
772 | ||
bf7cd94d | 773 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 774 | { |
bf7cd94d | 775 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 776 | u32 changed; |
472dbc45 | 777 | |
31f909a2 MH |
778 | if (ifmsh->mshcfg.plink_timeout > 0) |
779 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
780 | mesh_path_expire(sdata); |
781 | ||
df323818 | 782 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 783 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 784 | |
472dbc45 | 785 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
786 | round_jiffies(jiffies + |
787 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
788 | } |
789 | ||
e304bfd3 RP |
790 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
791 | { | |
792 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 793 | u32 interval; |
e304bfd3 RP |
794 | |
795 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
796 | |
797 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
798 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
799 | else | |
800 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
801 | ||
e304bfd3 | 802 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 803 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
804 | } |
805 | ||
2b5e1967 TP |
806 | static int |
807 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
808 | { | |
809 | struct beacon_data *bcn; | |
810 | int head_len, tail_len; | |
811 | struct sk_buff *skb; | |
812 | struct ieee80211_mgmt *mgmt; | |
813 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 814 | struct mesh_csa_settings *csa; |
57fbcce3 | 815 | enum nl80211_band band; |
60ad72da | 816 | u8 ie_len_he_cap; |
2b5e1967 TP |
817 | u8 *pos; |
818 | struct ieee80211_sub_if_data *sdata; | |
4c121fd6 | 819 | int hdr_len = offsetofend(struct ieee80211_mgmt, u.beacon); |
2b5e1967 TP |
820 | |
821 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
822 | rcu_read_lock(); | |
d0a9123e | 823 | chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); |
2b5e1967 TP |
824 | band = chanctx_conf->def.chan->band; |
825 | rcu_read_unlock(); | |
826 | ||
60ad72da SE |
827 | ie_len_he_cap = ieee80211_ie_len_he_cap(sdata, |
828 | NL80211_IFTYPE_MESH_POINT); | |
2b5e1967 TP |
829 | head_len = hdr_len + |
830 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
831 | /* Channel Switch Announcement */ |
832 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
08a7e621 | 833 | /* Mesh Channel Switch Parameters */ |
b8456a14 | 834 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + |
75d627d5 SW |
835 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ |
836 | 2 + 2 + sizeof(struct ieee80211_wide_bw_chansw_ie) + | |
837 | 2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
2b5e1967 TP |
838 | 2 + 8 + /* supported rates */ |
839 | 2 + 3; /* DS params */ | |
840 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
841 | 2 + sizeof(struct ieee80211_ht_cap) + | |
842 | 2 + sizeof(struct ieee80211_ht_operation) + | |
843 | 2 + ifmsh->mesh_id_len + | |
844 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
845 | 2 + sizeof(__le16) + /* awake window */ | |
c85fb53c BC |
846 | 2 + sizeof(struct ieee80211_vht_cap) + |
847 | 2 + sizeof(struct ieee80211_vht_operation) + | |
60ad72da SE |
848 | ie_len_he_cap + |
849 | 2 + 1 + sizeof(struct ieee80211_he_operation) + | |
d1b7524b | 850 | sizeof(struct ieee80211_he_6ghz_oper) + |
24a2042c | 851 | 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) + |
2b5e1967 TP |
852 | ifmsh->ie_len; |
853 | ||
854 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
855 | /* need an skb for IE builders to operate on */ | |
60df54f8 | 856 | skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL); |
2b5e1967 TP |
857 | |
858 | if (!bcn || !skb) | |
859 | goto out_free; | |
860 | ||
861 | /* | |
862 | * pointers go into the block we allocated, | |
863 | * memory is | beacon_data | head | tail | | |
864 | */ | |
865 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
866 | ||
867 | /* fill in the head */ | |
b080db58 | 868 | mgmt = skb_put_zero(skb, hdr_len); |
2b5e1967 TP |
869 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
870 | IEEE80211_STYPE_BEACON); | |
871 | eth_broadcast_addr(mgmt->da); | |
872 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
873 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
874 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
875 | mgmt->u.beacon.beacon_int = | |
876 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
877 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
878 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
879 | ||
880 | pos = skb_put(skb, 2); | |
881 | *pos++ = WLAN_EID_SSID; | |
882 | *pos++ = 0x0; | |
883 | ||
b8456a14 CYY |
884 | rcu_read_lock(); |
885 | csa = rcu_dereference(ifmsh->csa); | |
886 | if (csa) { | |
75d627d5 SW |
887 | enum nl80211_channel_type ct; |
888 | struct cfg80211_chan_def *chandef; | |
889 | int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
890 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie); | |
891 | ||
e45a79da | 892 | pos = skb_put_zero(skb, ie_len); |
b8456a14 CYY |
893 | *pos++ = WLAN_EID_CHANNEL_SWITCH; |
894 | *pos++ = 3; | |
895 | *pos++ = 0x0; | |
896 | *pos++ = ieee80211_frequency_to_channel( | |
897 | csa->settings.chandef.chan->center_freq); | |
8552a434 JC |
898 | bcn->cntdwn_current_counter = csa->settings.count; |
899 | bcn->cntdwn_counter_offsets[0] = hdr_len + 6; | |
b8456a14 CYY |
900 | *pos++ = csa->settings.count; |
901 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
902 | *pos++ = 6; | |
0cb4d4dc | 903 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
904 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
905 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
906 | } else { | |
907 | *pos++ = ifmsh->chsw_ttl; | |
908 | } | |
909 | *pos++ |= csa->settings.block_tx ? | |
910 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
911 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
912 | pos += 2; | |
ca91dc97 | 913 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 | 914 | pos += 2; |
75d627d5 SW |
915 | |
916 | switch (csa->settings.chandef.width) { | |
917 | case NL80211_CHAN_WIDTH_40: | |
918 | ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
e45a79da | 919 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
920 | |
921 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ | |
922 | *pos++ = 1; /* len */ | |
923 | ct = cfg80211_get_chandef_type(&csa->settings.chandef); | |
924 | if (ct == NL80211_CHAN_HT40PLUS) | |
925 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; | |
926 | else | |
927 | *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
928 | break; | |
929 | case NL80211_CHAN_WIDTH_80: | |
930 | case NL80211_CHAN_WIDTH_80P80: | |
931 | case NL80211_CHAN_WIDTH_160: | |
932 | /* Channel Switch Wrapper + Wide Bandwidth CSA IE */ | |
933 | ie_len = 2 + 2 + | |
934 | sizeof(struct ieee80211_wide_bw_chansw_ie); | |
e45a79da | 935 | pos = skb_put_zero(skb, ie_len); |
75d627d5 SW |
936 | |
937 | *pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */ | |
938 | *pos++ = 5; /* len */ | |
939 | /* put sub IE */ | |
940 | chandef = &csa->settings.chandef; | |
941 | ieee80211_ie_build_wide_bw_cs(pos, chandef); | |
942 | break; | |
943 | default: | |
944 | break; | |
945 | } | |
b8456a14 CYY |
946 | } |
947 | rcu_read_unlock(); | |
948 | ||
2b5e1967 | 949 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 950 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
951 | goto out_free; |
952 | ||
953 | bcn->head_len = skb->len; | |
954 | memcpy(bcn->head, skb->data, bcn->head_len); | |
955 | ||
956 | /* now the tail */ | |
957 | skb_trim(skb, 0); | |
958 | bcn->tail = bcn->head + bcn->head_len; | |
959 | ||
960 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
961 | mesh_add_rsn_ie(sdata, skb) || |
962 | mesh_add_ht_cap_ie(sdata, skb) || | |
963 | mesh_add_ht_oper_ie(sdata, skb) || | |
964 | mesh_add_meshid_ie(sdata, skb) || | |
965 | mesh_add_meshconf_ie(sdata, skb) || | |
966 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
967 | mesh_add_vht_cap_ie(sdata, skb) || |
968 | mesh_add_vht_oper_ie(sdata, skb) || | |
60ad72da SE |
969 | mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) || |
970 | mesh_add_he_oper_ie(sdata, skb) || | |
24a2042c | 971 | mesh_add_he_6ghz_cap_ie(sdata, skb) || |
bf7cd94d | 972 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
973 | goto out_free; |
974 | ||
975 | bcn->tail_len = skb->len; | |
976 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
70debba3 | 977 | ieee80211_mesh_update_bss_params(sdata, bcn->tail, bcn->tail_len); |
43552be1 TP |
978 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
979 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
980 | |
981 | dev_kfree_skb(skb); | |
982 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
983 | return 0; | |
984 | out_free: | |
985 | kfree(bcn); | |
986 | dev_kfree_skb(skb); | |
987 | return -ENOMEM; | |
988 | } | |
989 | ||
990 | static int | |
8d61ffa5 | 991 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 992 | { |
2b5e1967 TP |
993 | struct beacon_data *old_bcn; |
994 | int ret; | |
2b5e1967 | 995 | |
6858ad75 | 996 | old_bcn = sdata_dereference(sdata->u.mesh.beacon, sdata); |
8d61ffa5 | 997 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); |
2b5e1967 TP |
998 | if (ret) |
999 | /* just reuse old beacon */ | |
8d61ffa5 | 1000 | return ret; |
2b5e1967 TP |
1001 | |
1002 | if (old_bcn) | |
1003 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 1004 | return 0; |
2b5e1967 TP |
1005 | } |
1006 | ||
1007 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
1008 | u32 changed) | |
1009 | { | |
f81a9ded TP |
1010 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
1011 | unsigned long bits = changed; | |
1012 | u32 bit; | |
1013 | ||
1014 | if (!bits) | |
1015 | return; | |
1016 | ||
1017 | /* if we race with running work, worst case this work becomes a noop */ | |
1018 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
1019 | set_bit(bit, &ifmsh->mbss_changed); | |
1020 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
1021 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
1022 | } |
1023 | ||
1024 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
1025 | { |
1026 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1027 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
1028 | u32 changed = BSS_CHANGED_BEACON | |
1029 | BSS_CHANGED_BEACON_ENABLED | | |
1030 | BSS_CHANGED_HT | | |
1031 | BSS_CHANGED_BASIC_RATES | | |
dcbe73ca PKC |
1032 | BSS_CHANGED_BEACON_INT | |
1033 | BSS_CHANGED_MCAST_RATE; | |
472dbc45 | 1034 | |
09b17470 JB |
1035 | local->fif_other_bss++; |
1036 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
1037 | atomic_inc(&local->iff_allmultis); | |
1038 | ieee80211_configure_filter(local); | |
1039 | ||
c7108a71 | 1040 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
1041 | /* register sync ops from extensible synchronization framework */ |
1042 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
dbf498fb | 1043 | ifmsh->sync_offset_clockdrift_max = 0; |
6b9ac442 | 1044 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 1045 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 1046 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
1047 | sdata->vif.bss_conf.ht_operation_mode = |
1048 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 1049 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 1050 | |
39886b61 | 1051 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 1052 | |
2b5e1967 TP |
1053 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
1054 | ieee80211_stop_mesh(sdata); | |
1055 | return -ENOMEM; | |
1056 | } | |
1057 | ||
057d5f4b | 1058 | ieee80211_recalc_dtim(local, sdata); |
d8675a63 | 1059 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); |
c405c629 JB |
1060 | |
1061 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 1062 | return 0; |
472dbc45 JB |
1063 | } |
1064 | ||
1065 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
1066 | { | |
09b17470 | 1067 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 1068 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 1069 | struct beacon_data *bcn; |
29cbe68c | 1070 | |
c405c629 JB |
1071 | netif_carrier_off(sdata->dev); |
1072 | ||
c37a54ac MH |
1073 | /* flush STAs and mpaths on this iface */ |
1074 | sta_info_flush(sdata); | |
0112fa55 | 1075 | ieee80211_free_keys(sdata, true); |
c37a54ac MH |
1076 | mesh_path_flush_by_iface(sdata); |
1077 | ||
0d466b9c | 1078 | /* stop the beacon */ |
29cbe68c | 1079 | ifmsh->mesh_id_len = 0; |
d6a83228 | 1080 | sdata->vif.bss_conf.enable_beacon = false; |
08fad438 | 1081 | sdata->beacon_rate_set = false; |
d6a83228 | 1082 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
d8675a63 JB |
1083 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, |
1084 | BSS_CHANGED_BEACON_ENABLED); | |
c37a54ac MH |
1085 | |
1086 | /* remove beacon */ | |
6858ad75 | 1087 | bcn = sdata_dereference(ifmsh->beacon, sdata); |
0c2bef46 | 1088 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 1089 | kfree_rcu(bcn, rcu_head); |
0d466b9c | 1090 | |
3f52b7e3 MP |
1091 | /* free all potentially still buffered group-addressed frames */ |
1092 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
1093 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
1094 | ||
472dbc45 | 1095 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 1096 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 1097 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 1098 | |
f81a9ded TP |
1099 | /* clear any mesh work (for next join) we may have accrued */ |
1100 | ifmsh->wrkq_flags = 0; | |
1101 | ifmsh->mbss_changed = 0; | |
1102 | ||
09b17470 JB |
1103 | local->fif_other_bss--; |
1104 | atomic_dec(&local->iff_allmultis); | |
1105 | ieee80211_configure_filter(local); | |
472dbc45 JB |
1106 | } |
1107 | ||
5d55371b BB |
1108 | static void ieee80211_mesh_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
1109 | { | |
1110 | int err; | |
1111 | ||
1112 | /* if the current channel is a DFS channel, mark the channel as | |
1113 | * unavailable. | |
1114 | */ | |
1115 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
1116 | &sdata->vif.bss_conf.chandef, | |
1117 | NL80211_IFTYPE_MESH_POINT); | |
1118 | if (err > 0) | |
1119 | cfg80211_radar_event(sdata->local->hw.wiphy, | |
1120 | &sdata->vif.bss_conf.chandef, GFP_ATOMIC); | |
1121 | } | |
1122 | ||
33a45867 CYY |
1123 | static bool |
1124 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
1125 | struct ieee802_11_elems *elems, bool beacon) | |
1126 | { | |
1127 | struct cfg80211_csa_settings params; | |
1128 | struct ieee80211_csa_ie csa_ie; | |
33a45867 | 1129 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
21a8e9dd | 1130 | struct ieee80211_supported_band *sband; |
0cb4d4dc | 1131 | int err; |
ba323e29 JB |
1132 | ieee80211_conn_flags_t conn_flags = 0; |
1133 | u32 vht_cap_info = 0; | |
33a45867 | 1134 | |
dbd72850 MK |
1135 | sdata_assert_lock(sdata); |
1136 | ||
21a8e9dd MSS |
1137 | sband = ieee80211_get_sband(sdata); |
1138 | if (!sband) | |
1139 | return false; | |
1140 | ||
33a45867 CYY |
1141 | switch (sdata->vif.bss_conf.chandef.width) { |
1142 | case NL80211_CHAN_WIDTH_20_NOHT: | |
ba323e29 | 1143 | conn_flags |= IEEE80211_CONN_DISABLE_HT; |
fc0561dc | 1144 | fallthrough; |
33a45867 | 1145 | case NL80211_CHAN_WIDTH_20: |
ba323e29 | 1146 | conn_flags |= IEEE80211_CONN_DISABLE_40MHZ; |
fc0561dc | 1147 | fallthrough; |
71ec289e | 1148 | case NL80211_CHAN_WIDTH_40: |
ba323e29 | 1149 | conn_flags |= IEEE80211_CONN_DISABLE_VHT; |
33a45867 CYY |
1150 | break; |
1151 | default: | |
1152 | break; | |
1153 | } | |
1154 | ||
2a333a0d JB |
1155 | if (elems->vht_cap_elem) |
1156 | vht_cap_info = | |
1157 | le32_to_cpu(elems->vht_cap_elem->vht_cap_info); | |
1158 | ||
33a45867 | 1159 | memset(¶ms, 0, sizeof(params)); |
21a8e9dd | 1160 | err = ieee80211_parse_ch_switch_ie(sdata, elems, sband->band, |
2a333a0d | 1161 | vht_cap_info, |
ba323e29 | 1162 | conn_flags, sdata->vif.addr, |
33a45867 CYY |
1163 | &csa_ie); |
1164 | if (err < 0) | |
1165 | return false; | |
1166 | if (err) | |
1167 | return false; | |
1168 | ||
5d55371b BB |
1169 | /* Mark the channel unavailable if the reason for the switch is |
1170 | * regulatory. | |
1171 | */ | |
1172 | if (csa_ie.reason_code == WLAN_REASON_MESH_CHAN_REGULATORY) | |
1173 | ieee80211_mesh_csa_mark_radar(sdata); | |
1174 | ||
33a45867 CYY |
1175 | params.chandef = csa_ie.chandef; |
1176 | params.count = csa_ie.count; | |
1177 | ||
33a45867 | 1178 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
0ab2e55d BB |
1179 | IEEE80211_CHAN_DISABLED) || |
1180 | !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, | |
1181 | NL80211_IFTYPE_MESH_POINT)) { | |
33a45867 CYY |
1182 | sdata_info(sdata, |
1183 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1184 | sdata->vif.addr, | |
1185 | params.chandef.chan->center_freq, | |
1186 | params.chandef.width, | |
1187 | params.chandef.center_freq1, | |
1188 | params.chandef.center_freq2); | |
1189 | return false; | |
1190 | } | |
1191 | ||
1192 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
1193 | ¶ms.chandef, |
1194 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
1195 | if (err < 0) |
1196 | return false; | |
0ab2e55d BB |
1197 | if (err > 0 && !ifmsh->userspace_handles_dfs) { |
1198 | sdata_info(sdata, | |
1199 | "mesh STA %pM switches to channel requiring DFS (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
1200 | sdata->vif.addr, | |
1201 | params.chandef.chan->center_freq, | |
1202 | params.chandef.width, | |
1203 | params.chandef.center_freq1, | |
1204 | params.chandef.center_freq2); | |
33a45867 | 1205 | return false; |
0ab2e55d | 1206 | } |
2beb6dab LC |
1207 | |
1208 | params.radar_required = err; | |
33a45867 | 1209 | |
0cb4d4dc LC |
1210 | if (cfg80211_chandef_identical(¶ms.chandef, |
1211 | &sdata->vif.bss_conf.chandef)) { | |
1212 | mcsa_dbg(sdata, | |
1213 | "received csa with an identical chandef, ignoring\n"); | |
1214 | return true; | |
1215 | } | |
33a45867 CYY |
1216 | |
1217 | mcsa_dbg(sdata, | |
1218 | "received channel switch announcement to go to channel %d MHz\n", | |
1219 | params.chandef.chan->center_freq); | |
1220 | ||
1221 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 1222 | if (beacon) { |
33a45867 | 1223 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
1224 | if (ifmsh->pre_value >= csa_ie.pre_value) |
1225 | return false; | |
1226 | ifmsh->pre_value = csa_ie.pre_value; | |
1227 | } | |
33a45867 | 1228 | |
0cb4d4dc | 1229 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 1230 | return false; |
33a45867 | 1231 | |
0cb4d4dc | 1232 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 1233 | |
0cb4d4dc LC |
1234 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
1235 | ¶ms) < 0) | |
1236 | return false; | |
33a45867 CYY |
1237 | |
1238 | return true; | |
33a45867 CYY |
1239 | } |
1240 | ||
9fb04b50 TP |
1241 | static void |
1242 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1243 | struct ieee80211_mgmt *mgmt, size_t len) | |
1244 | { | |
1245 | struct ieee80211_local *local = sdata->local; | |
1246 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1247 | struct sk_buff *presp; | |
1248 | struct beacon_data *bcn; | |
1249 | struct ieee80211_mgmt *hdr; | |
5d24828d | 1250 | struct ieee802_11_elems *elems; |
9fb04b50 | 1251 | size_t baselen; |
511044ea | 1252 | u8 *pos; |
9fb04b50 | 1253 | |
9fb04b50 TP |
1254 | pos = mgmt->u.probe_req.variable; |
1255 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1256 | if (baselen > len) | |
1257 | return; | |
1258 | ||
38c6aa29 | 1259 | elems = ieee802_11_parse_elems(pos, len - baselen, false, NULL); |
5d24828d | 1260 | if (!elems) |
a4ef66a9 CYY |
1261 | return; |
1262 | ||
5d24828d JB |
1263 | if (!elems->mesh_id) |
1264 | goto free; | |
1265 | ||
9fb04b50 TP |
1266 | /* 802.11-2012 10.1.4.3.2 */ |
1267 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1268 | !is_broadcast_ether_addr(mgmt->da)) || | |
5d24828d JB |
1269 | elems->ssid_len != 0) |
1270 | goto free; | |
9fb04b50 | 1271 | |
5d24828d JB |
1272 | if (elems->mesh_id_len != 0 && |
1273 | (elems->mesh_id_len != ifmsh->mesh_id_len || | |
1274 | memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1275 | goto free; | |
9fb04b50 TP |
1276 | |
1277 | rcu_read_lock(); | |
1278 | bcn = rcu_dereference(ifmsh->beacon); | |
1279 | ||
1280 | if (!bcn) | |
1281 | goto out; | |
1282 | ||
1283 | presp = dev_alloc_skb(local->tx_headroom + | |
1284 | bcn->head_len + bcn->tail_len); | |
1285 | if (!presp) | |
1286 | goto out; | |
1287 | ||
1288 | skb_reserve(presp, local->tx_headroom); | |
59ae1d12 JB |
1289 | skb_put_data(presp, bcn->head, bcn->head_len); |
1290 | skb_put_data(presp, bcn->tail, bcn->tail_len); | |
9fb04b50 TP |
1291 | hdr = (struct ieee80211_mgmt *) presp->data; |
1292 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1293 | IEEE80211_STYPE_PROBE_RESP); | |
1294 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1295 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1296 | ieee80211_tx_skb(sdata, presp); | |
1297 | out: | |
1298 | rcu_read_unlock(); | |
5d24828d JB |
1299 | free: |
1300 | kfree(elems); | |
9fb04b50 TP |
1301 | } |
1302 | ||
472dbc45 JB |
1303 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1304 | u16 stype, | |
1305 | struct ieee80211_mgmt *mgmt, | |
1306 | size_t len, | |
1307 | struct ieee80211_rx_status *rx_status) | |
1308 | { | |
c6a1fa12 | 1309 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1310 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
5d24828d | 1311 | struct ieee802_11_elems *elems; |
472dbc45 | 1312 | struct ieee80211_channel *channel; |
472dbc45 JB |
1313 | size_t baselen; |
1314 | int freq; | |
57fbcce3 | 1315 | enum nl80211_band band = rx_status->band; |
472dbc45 JB |
1316 | |
1317 | /* ignore ProbeResp to foreign address */ | |
1318 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1319 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1320 | return; |
1321 | ||
1322 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1323 | if (baselen > len) | |
1324 | return; | |
1325 | ||
5d24828d JB |
1326 | elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, |
1327 | len - baselen, | |
38c6aa29 | 1328 | false, NULL); |
5d24828d JB |
1329 | if (!elems) |
1330 | return; | |
472dbc45 | 1331 | |
9a90bc81 | 1332 | /* ignore non-mesh or secure / unsecure mismatch */ |
5d24828d JB |
1333 | if ((!elems->mesh_id || !elems->mesh_config) || |
1334 | (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1335 | (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
1336 | goto free; | |
5cff5e01 | 1337 | |
5d24828d JB |
1338 | if (elems->ds_params) |
1339 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); | |
472dbc45 JB |
1340 | else |
1341 | freq = rx_status->freq; | |
1342 | ||
1343 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1344 | ||
1345 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
5d24828d | 1346 | goto free; |
472dbc45 | 1347 | |
5d24828d | 1348 | if (mesh_matches_local(sdata, elems)) { |
ed92a9b5 MH |
1349 | mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", |
1350 | sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); | |
1351 | if (!sdata->u.mesh.user_mpm || | |
1352 | sdata->u.mesh.mshcfg.rssi_threshold == 0 || | |
1353 | sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) | |
5d24828d | 1354 | mesh_neighbour_update(sdata, mgmt->sa, elems, |
ecbc12ad | 1355 | rx_status); |
93e2d04a T |
1356 | |
1357 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && | |
d0a9123e | 1358 | !sdata->vif.bss_conf.csa_active) |
5d24828d | 1359 | ieee80211_mesh_process_chnswitch(sdata, elems, true); |
ed92a9b5 | 1360 | } |
dbf498fb JC |
1361 | |
1362 | if (ifmsh->sync_ops) | |
a5b983c6 | 1363 | ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, |
5d24828d JB |
1364 | elems->mesh_config, rx_status); |
1365 | free: | |
1366 | kfree(elems); | |
472dbc45 JB |
1367 | } |
1368 | ||
b8456a14 CYY |
1369 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1370 | { | |
1371 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1372 | struct mesh_csa_settings *tmp_csa_settings; | |
1373 | int ret = 0; | |
faf046e7 | 1374 | int changed = 0; |
b8456a14 CYY |
1375 | |
1376 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1377 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1378 | ifmsh->chsw_ttl = 0; |
1379 | ||
1380 | /* Remove the CSA and MCSP elements from the beacon */ | |
6858ad75 | 1381 | tmp_csa_settings = sdata_dereference(ifmsh->csa, sdata); |
0c2bef46 | 1382 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1383 | if (tmp_csa_settings) |
1384 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1385 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1386 | if (ret) | |
1387 | return -EINVAL; | |
1388 | ||
faf046e7 | 1389 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1390 | |
1391 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1392 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1393 | return changed; |
b8456a14 CYY |
1394 | } |
1395 | ||
1396 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1397 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1398 | { |
1399 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1400 | struct mesh_csa_settings *tmp_csa_settings; | |
1401 | int ret = 0; | |
1402 | ||
55184244 TP |
1403 | lockdep_assert_held(&sdata->wdev.mtx); |
1404 | ||
b8456a14 CYY |
1405 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), |
1406 | GFP_ATOMIC); | |
1407 | if (!tmp_csa_settings) | |
1408 | return -ENOMEM; | |
1409 | ||
1410 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1411 | sizeof(struct cfg80211_csa_settings)); | |
1412 | ||
1413 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1414 | ||
1415 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1416 | if (ret) { | |
1417 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1418 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1419 | kfree_rcu(tmp_csa_settings, rcu_head); |
1420 | return ret; | |
1421 | } | |
1422 | ||
b58e81e9 | 1423 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1424 | } |
1425 | ||
8f2535b9 | 1426 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
c4de37ee PO |
1427 | struct ieee80211_mgmt *mgmt, size_t len, |
1428 | struct ieee802_11_elems *elems) | |
8f2535b9 CYY |
1429 | { |
1430 | struct ieee80211_mgmt *mgmt_fwd; | |
1431 | struct sk_buff *skb; | |
1432 | struct ieee80211_local *local = sdata->local; | |
8f2535b9 CYY |
1433 | |
1434 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1435 | if (!skb) | |
1436 | return -ENOMEM; | |
1437 | skb_reserve(skb, local->tx_headroom); | |
4df864c1 | 1438 | mgmt_fwd = skb_put(skb, len); |
8f2535b9 | 1439 | |
c4de37ee PO |
1440 | elems->mesh_chansw_params_ie->mesh_ttl--; |
1441 | elems->mesh_chansw_params_ie->mesh_flags &= | |
1442 | ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
8f2535b9 CYY |
1443 | |
1444 | memcpy(mgmt_fwd, mgmt, len); | |
1445 | eth_broadcast_addr(mgmt_fwd->da); | |
1446 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1447 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1448 | ||
1449 | ieee80211_tx_skb(sdata, skb); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1454 | struct ieee80211_mgmt *mgmt, size_t len) | |
1455 | { | |
1456 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
5d24828d | 1457 | struct ieee802_11_elems *elems; |
8f2535b9 | 1458 | u16 pre_value; |
33a45867 | 1459 | bool fwd_csa = true; |
8f2535b9 | 1460 | size_t baselen; |
3f718fd8 | 1461 | u8 *pos; |
8f2535b9 CYY |
1462 | |
1463 | if (mgmt->u.action.u.measurement.action_code != | |
1464 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1465 | return; | |
1466 | ||
1467 | pos = mgmt->u.action.u.chan_switch.variable; | |
1468 | baselen = offsetof(struct ieee80211_mgmt, | |
1469 | u.action.u.chan_switch.variable); | |
38c6aa29 | 1470 | elems = ieee802_11_parse_elems(pos, len - baselen, true, NULL); |
5d24828d | 1471 | if (!elems) |
93e2d04a T |
1472 | return; |
1473 | ||
5d24828d JB |
1474 | if (!mesh_matches_local(sdata, elems)) |
1475 | goto free; | |
1476 | ||
1477 | ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; | |
3f718fd8 | 1478 | if (!--ifmsh->chsw_ttl) |
8f2535b9 CYY |
1479 | fwd_csa = false; |
1480 | ||
5d24828d | 1481 | pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); |
8f2535b9 | 1482 | if (ifmsh->pre_value >= pre_value) |
5d24828d | 1483 | goto free; |
8f2535b9 CYY |
1484 | |
1485 | ifmsh->pre_value = pre_value; | |
1486 | ||
d0a9123e | 1487 | if (!sdata->vif.bss_conf.csa_active && |
5d24828d | 1488 | !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { |
33a45867 | 1489 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
5d24828d | 1490 | goto free; |
33a45867 CYY |
1491 | } |
1492 | ||
8f2535b9 CYY |
1493 | /* forward or re-broadcast the CSA frame */ |
1494 | if (fwd_csa) { | |
5d24828d | 1495 | if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) |
8f2535b9 CYY |
1496 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); |
1497 | } | |
5d24828d JB |
1498 | free: |
1499 | kfree(elems); | |
8f2535b9 CYY |
1500 | } |
1501 | ||
472dbc45 JB |
1502 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1503 | struct ieee80211_mgmt *mgmt, | |
1504 | size_t len, | |
1505 | struct ieee80211_rx_status *rx_status) | |
1506 | { | |
1507 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1508 | case WLAN_CATEGORY_SELF_PROTECTED: |
1509 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1510 | case WLAN_SP_MESH_PEERING_OPEN: | |
1511 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1512 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1513 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1514 | break; | |
1515 | } | |
472dbc45 | 1516 | break; |
25d49e4d TP |
1517 | case WLAN_CATEGORY_MESH_ACTION: |
1518 | if (mesh_action_is_path_sel(mgmt)) | |
1519 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1520 | break; |
8f2535b9 CYY |
1521 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1522 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1523 | break; | |
472dbc45 JB |
1524 | } |
1525 | } | |
1526 | ||
1fa57d01 JB |
1527 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1528 | struct sk_buff *skb) | |
472dbc45 JB |
1529 | { |
1530 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1531 | struct ieee80211_mgmt *mgmt; |
1532 | u16 stype; | |
1533 | ||
ecccd072 TP |
1534 | sdata_lock(sdata); |
1535 | ||
1536 | /* mesh already went down */ | |
1693d344 | 1537 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1538 | goto out; |
1539 | ||
f1d58c25 | 1540 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1541 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1542 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1543 | ||
1544 | switch (stype) { | |
1545 | case IEEE80211_STYPE_PROBE_RESP: | |
1546 | case IEEE80211_STYPE_BEACON: | |
1547 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1548 | rx_status); | |
1549 | break; | |
9fb04b50 TP |
1550 | case IEEE80211_STYPE_PROBE_REQ: |
1551 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1552 | break; | |
472dbc45 JB |
1553 | case IEEE80211_STYPE_ACTION: |
1554 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1555 | break; | |
1556 | } | |
ecccd072 TP |
1557 | out: |
1558 | sdata_unlock(sdata); | |
472dbc45 JB |
1559 | } |
1560 | ||
f81a9ded TP |
1561 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1562 | { | |
1563 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1564 | u32 bit, changed = 0; | |
1565 | ||
1566 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1567 | sizeof(changed) * BITS_PER_BYTE) { | |
1568 | clear_bit(bit, &ifmsh->mbss_changed); | |
1569 | changed |= BIT(bit); | |
1570 | } | |
1571 | ||
1572 | if (sdata->vif.bss_conf.enable_beacon && | |
1573 | (changed & (BSS_CHANGED_BEACON | | |
1574 | BSS_CHANGED_HT | | |
1575 | BSS_CHANGED_BASIC_RATES | | |
1576 | BSS_CHANGED_BEACON_INT))) | |
1577 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1578 | return; | |
1579 | ||
d8675a63 | 1580 | ieee80211_link_info_change_notify(sdata, &sdata->deflink, changed); |
f81a9ded TP |
1581 | } |
1582 | ||
1fa57d01 | 1583 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1584 | { |
472dbc45 | 1585 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1586 | |
ecccd072 TP |
1587 | sdata_lock(sdata); |
1588 | ||
1589 | /* mesh already went down */ | |
1693d344 | 1590 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1591 | goto out; |
1592 | ||
472dbc45 JB |
1593 | if (ifmsh->preq_queue_len && |
1594 | time_after(jiffies, | |
1595 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1596 | mesh_path_start_discovery(sdata); | |
1597 | ||
18889231 | 1598 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
bf7cd94d | 1599 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1600 | |
1601 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1602 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1603 | |
1604 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
445cd452 | 1605 | mesh_sync_adjust_tsf(sdata); |
ecccd072 | 1606 | |
f81a9ded TP |
1607 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1608 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1609 | out: |
1610 | sdata_unlock(sdata); | |
472dbc45 JB |
1611 | } |
1612 | ||
472dbc45 | 1613 | |
902acc78 JB |
1614 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1615 | { | |
472dbc45 | 1616 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1617 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1618 | |
34f11cd3 KC |
1619 | timer_setup(&ifmsh->housekeeping_timer, |
1620 | ieee80211_mesh_housekeeping_timer, 0); | |
472dbc45 | 1621 | |
472dbc45 | 1622 | ifmsh->accepting_plinks = true; |
472dbc45 | 1623 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1624 | mesh_rmc_init(sdata); |
472dbc45 | 1625 | ifmsh->last_preq = jiffies; |
dca7e943 | 1626 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1627 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1628 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1629 | if (!mesh_allocated) | |
1630 | ieee80211s_init(); | |
2bdaf386 BC |
1631 | |
1632 | mesh_pathtbl_init(sdata); | |
1633 | ||
34f11cd3 KC |
1634 | timer_setup(&ifmsh->mesh_path_timer, ieee80211_mesh_path_timer, 0); |
1635 | timer_setup(&ifmsh->mesh_path_root_timer, | |
1636 | ieee80211_mesh_path_root_timer, 0); | |
472dbc45 | 1637 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1638 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1639 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1640 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1641 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1642 | |
1643 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1644 | } |
0371a08f BC |
1645 | |
1646 | void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) | |
1647 | { | |
1648 | mesh_rmc_free(sdata); | |
1649 | mesh_pathtbl_unregister(sdata); | |
1650 | } |