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 | ||
472dbc45 JB |
40 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
41 | { | |
42 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
43 | struct ieee80211_local *local = sdata->local; | |
44 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
45 | ||
6b9ac442 | 46 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 47 | |
64592c8f | 48 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
49 | } |
50 | ||
2e3c8736 LCC |
51 | /** |
52 | * mesh_matches_local - check if the config of a mesh point matches ours | |
53 | * | |
f698d856 | 54 | * @sdata: local mesh subif |
f743ff49 | 55 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
56 | * |
57 | * This function checks if the mesh configuration of a mesh point matches the | |
58 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
59 | */ | |
f743ff49 TP |
60 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
61 | struct ieee802_11_elems *ie) | |
2e3c8736 | 62 | { |
472dbc45 | 63 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
f743ff49 | 64 | u32 basic_rates = 0; |
4bf88530 | 65 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 66 | |
2e3c8736 LCC |
67 | /* |
68 | * As support for each feature is added, check for matching | |
69 | * - On mesh config capabilities | |
70 | * - Power Save Support En | |
71 | * - Sync support enabled | |
72 | * - Sync support active | |
73 | * - Sync support required from peer | |
74 | * - MDA enabled | |
75 | * - Power management control on fc | |
76 | */ | |
739522ba TP |
77 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
78 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
79 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
80 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
81 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
82 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
83 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 84 | return false; |
739522ba | 85 | |
2103dec1 | 86 | ieee80211_sta_get_rates(sdata, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
87 | &basic_rates); |
88 | ||
fe40cb62 | 89 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 90 | return false; |
fe40cb62 | 91 | |
8ac3c704 JB |
92 | cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan, |
93 | NL80211_CHAN_NO_HT); | |
94 | ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def); | |
95 | ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def); | |
c85fb53c | 96 | |
4bf88530 JB |
97 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, |
98 | &sta_chan_def)) | |
bf7cd94d | 99 | return false; |
2e3c8736 | 100 | |
739522ba | 101 | return true; |
2e3c8736 LCC |
102 | } |
103 | ||
104 | /** | |
105 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
106 | * | |
107 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 108 | */ |
f698d856 | 109 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 110 | { |
136cfa28 | 111 | return (ie->mesh_config->meshconf_cap & |
bf7cd94d | 112 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
113 | } |
114 | ||
115 | /** | |
2c53040f | 116 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 117 | * |
d0709a65 | 118 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
119 | * |
120 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 121 | */ |
df323818 | 122 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 123 | { |
2e3c8736 | 124 | bool free_plinks; |
df323818 | 125 | u32 changed = 0; |
2e3c8736 LCC |
126 | |
127 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
128 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
129 | * are already on the table but are not on PLINK_ESTAB state. However, |
130 | * in general the mesh interface is not accepting peer link requests | |
131 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
132 | */ |
133 | free_plinks = mesh_plink_availables(sdata); | |
134 | ||
df323818 MP |
135 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
136 | sdata->u.mesh.accepting_plinks = free_plinks; | |
137 | changed = BSS_CHANGED_BEACON; | |
138 | } | |
139 | ||
140 | return changed; | |
2e3c8736 LCC |
141 | } |
142 | ||
45b5028e TP |
143 | /* |
144 | * mesh_sta_cleanup - clean up any mesh sta state | |
145 | * | |
146 | * @sta: mesh sta to clean up. | |
147 | */ | |
148 | void mesh_sta_cleanup(struct sta_info *sta) | |
149 | { | |
150 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
126e7557 | 151 | u32 changed = 0; |
45b5028e TP |
152 | |
153 | /* | |
154 | * maybe userspace handles peer allocation and peering, but in either | |
155 | * case the beacon is still generated by the kernel and we might need | |
156 | * an update. | |
157 | */ | |
126e7557 JM |
158 | if (sdata->u.mesh.user_mpm && |
159 | sta->mesh->plink_state == NL80211_PLINK_ESTAB) | |
160 | changed |= mesh_plink_dec_estab_count(sdata); | |
161 | changed |= mesh_accept_plinks_update(sdata); | |
a6dad6a2 | 162 | if (!sdata->u.mesh.user_mpm) { |
45b5028e | 163 | changed |= mesh_plink_deactivate(sta); |
433f5bc1 | 164 | del_timer_sync(&sta->mesh->plink_timer); |
45b5028e TP |
165 | } |
166 | ||
fe7a7c57 BC |
167 | /* make sure no readers can access nexthop sta from here on */ |
168 | mesh_path_flush_by_nexthop(sta); | |
169 | synchronize_net(); | |
170 | ||
f81a9ded | 171 | if (changed) |
2b5e1967 | 172 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
173 | } |
174 | ||
f698d856 | 175 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 176 | { |
2e3c8736 LCC |
177 | int i; |
178 | ||
472dbc45 JB |
179 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
180 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 181 | return -ENOMEM; |
472dbc45 | 182 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 183 | for (i = 0; i < RMC_BUCKETS; i++) |
47a0489c | 184 | INIT_HLIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
185 | return 0; |
186 | } | |
187 | ||
f698d856 | 188 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 189 | { |
472dbc45 | 190 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
47a0489c BC |
191 | struct rmc_entry *p; |
192 | struct hlist_node *n; | |
2e3c8736 LCC |
193 | int i; |
194 | ||
472dbc45 | 195 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
196 | return; |
197 | ||
bf7cd94d | 198 | for (i = 0; i < RMC_BUCKETS; i++) { |
47a0489c BC |
199 | hlist_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
200 | hlist_del(&p->list); | |
2e3c8736 LCC |
201 | kmem_cache_free(rm_cache, p); |
202 | } | |
bf7cd94d | 203 | } |
2e3c8736 LCC |
204 | |
205 | kfree(rmc); | |
472dbc45 | 206 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
207 | } |
208 | ||
209 | /** | |
210 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
211 | * | |
bf7cd94d | 212 | * @sdata: interface |
2e3c8736 LCC |
213 | * @sa: source address |
214 | * @mesh_hdr: mesh_header | |
215 | * | |
216 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
217 | * | |
218 | * Checks using the source address and the mesh sequence number if we have | |
219 | * received this frame lately. If the frame is not in the cache, it is added to | |
220 | * it. | |
221 | */ | |
bf7cd94d JB |
222 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
223 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 224 | { |
472dbc45 | 225 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
226 | u32 seqnum = 0; |
227 | int entries = 0; | |
228 | u8 idx; | |
47a0489c BC |
229 | struct rmc_entry *p; |
230 | struct hlist_node *n; | |
2e3c8736 | 231 | |
0aa7fabb BC |
232 | if (!rmc) |
233 | return -1; | |
234 | ||
2e3c8736 | 235 | /* Don't care about endianness since only match matters */ |
51ceddad LCC |
236 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
237 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
47a0489c | 238 | hlist_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
239 | ++entries; |
240 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 241 | entries == RMC_QUEUE_MAX_LEN) { |
47a0489c | 242 | hlist_del(&p->list); |
2e3c8736 LCC |
243 | kmem_cache_free(rm_cache, p); |
244 | --entries; | |
bf7cd94d | 245 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
246 | return -1; |
247 | } | |
248 | ||
249 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 250 | if (!p) |
2e3c8736 | 251 | return 0; |
d15b8459 | 252 | |
2e3c8736 LCC |
253 | p->seqnum = seqnum; |
254 | p->exp_time = jiffies + RMC_TIMEOUT; | |
255 | memcpy(p->sa, sa, ETH_ALEN); | |
47a0489c | 256 | hlist_add_head(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
257 | return 0; |
258 | } | |
259 | ||
bf7cd94d JB |
260 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
261 | struct sk_buff *skb) | |
082ebb0c TP |
262 | { |
263 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
264 | u8 *pos, neighbors; | |
265 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
266 | ||
267 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
268 | return -ENOMEM; | |
269 | ||
270 | pos = skb_put(skb, 2 + meshconf_len); | |
271 | *pos++ = WLAN_EID_MESH_CONFIG; | |
272 | *pos++ = meshconf_len; | |
273 | ||
43552be1 TP |
274 | /* save a pointer for quick updates in pre-tbtt */ |
275 | ifmsh->meshconf_offset = pos - skb->data; | |
276 | ||
082ebb0c TP |
277 | /* Active path selection protocol ID */ |
278 | *pos++ = ifmsh->mesh_pp_id; | |
279 | /* Active path selection metric ID */ | |
280 | *pos++ = ifmsh->mesh_pm_id; | |
281 | /* Congestion control mode identifier */ | |
282 | *pos++ = ifmsh->mesh_cc_id; | |
283 | /* Synchronization protocol identifier */ | |
284 | *pos++ = ifmsh->mesh_sp_id; | |
285 | /* Authentication Protocol identifier */ | |
286 | *pos++ = ifmsh->mesh_auth_id; | |
287 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 288 | neighbors = atomic_read(&ifmsh->estab_plinks); |
e05ecccd | 289 | neighbors = min_t(int, neighbors, IEEE80211_MAX_MESH_PEERINGS); |
082ebb0c TP |
290 | *pos++ = neighbors << 1; |
291 | /* Mesh capability */ | |
b60e527a CYY |
292 | *pos = 0x00; |
293 | *pos |= ifmsh->mshcfg.dot11MeshForwarding ? | |
294 | IEEE80211_MESHCONF_CAPAB_FORWARDING : 0x00; | |
dbf498fb | 295 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 296 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
297 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
298 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 299 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
dbf498fb | 300 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 301 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
302 | *pos++ = 0x00; |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
bf7cd94d | 307 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
308 | { |
309 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
310 | u8 *pos; | |
311 | ||
312 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
313 | return -ENOMEM; | |
314 | ||
315 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
316 | *pos++ = WLAN_EID_MESH_ID; | |
317 | *pos++ = ifmsh->mesh_id_len; | |
318 | if (ifmsh->mesh_id_len) | |
319 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
bf7cd94d JB |
324 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
325 | struct sk_buff *skb) | |
3f52b7e3 MP |
326 | { |
327 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
328 | u8 *pos; | |
329 | ||
330 | /* see IEEE802.11-2012 13.14.6 */ | |
331 | if (ifmsh->ps_peers_light_sleep == 0 && | |
332 | ifmsh->ps_peers_deep_sleep == 0 && | |
333 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
334 | return 0; | |
335 | ||
336 | if (skb_tailroom(skb) < 4) | |
337 | return -ENOMEM; | |
338 | ||
339 | pos = skb_put(skb, 2 + 2); | |
340 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
341 | *pos++ = 2; | |
342 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
bf7cd94d JB |
347 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
348 | struct sk_buff *skb) | |
082ebb0c TP |
349 | { |
350 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
351 | u8 offset, len; | |
352 | const u8 *data; | |
353 | ||
354 | if (!ifmsh->ie || !ifmsh->ie_len) | |
355 | return 0; | |
356 | ||
357 | /* fast-forward to vendor IEs */ | |
358 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
359 | ||
360 | if (offset) { | |
361 | len = ifmsh->ie_len - offset; | |
362 | data = ifmsh->ie + offset; | |
363 | if (skb_tailroom(skb) < len) | |
364 | return -ENOMEM; | |
365 | memcpy(skb_put(skb, len), data, len); | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
bf7cd94d | 371 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
372 | { |
373 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
374 | u8 len = 0; | |
375 | const u8 *data; | |
376 | ||
377 | if (!ifmsh->ie || !ifmsh->ie_len) | |
378 | return 0; | |
379 | ||
380 | /* find RSN IE */ | |
a40a8c17 BC |
381 | data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); |
382 | if (!data) | |
383 | return 0; | |
082ebb0c | 384 | |
a40a8c17 BC |
385 | len = data[1] + 2; |
386 | ||
387 | if (skb_tailroom(skb) < len) | |
388 | return -ENOMEM; | |
389 | memcpy(skb_put(skb, len), data, len); | |
082ebb0c TP |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
bf7cd94d JB |
394 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
395 | struct sk_buff *skb) | |
082ebb0c | 396 | { |
55de908a JB |
397 | struct ieee80211_chanctx_conf *chanctx_conf; |
398 | struct ieee80211_channel *chan; | |
082ebb0c | 399 | u8 *pos; |
2e3c8736 | 400 | |
082ebb0c TP |
401 | if (skb_tailroom(skb) < 3) |
402 | return -ENOMEM; | |
403 | ||
55de908a JB |
404 | rcu_read_lock(); |
405 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
406 | if (WARN_ON(!chanctx_conf)) { | |
407 | rcu_read_unlock(); | |
408 | return -EINVAL; | |
409 | } | |
4bf88530 | 410 | chan = chanctx_conf->def.chan; |
55de908a JB |
411 | rcu_read_unlock(); |
412 | ||
601513aa ET |
413 | pos = skb_put(skb, 2 + 1); |
414 | *pos++ = WLAN_EID_DS_PARAMS; | |
415 | *pos++ = 1; | |
416 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 417 | |
082ebb0c | 418 | return 0; |
2e3c8736 LCC |
419 | } |
420 | ||
bf7cd94d JB |
421 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
422 | struct sk_buff *skb) | |
176f3608 TP |
423 | { |
424 | struct ieee80211_local *local = sdata->local; | |
57fbcce3 | 425 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
426 | struct ieee80211_supported_band *sband; |
427 | u8 *pos; | |
428 | ||
55de908a | 429 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 430 | if (!sband->ht_cap.ht_supported || |
0418a445 SW |
431 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
432 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
433 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
434 | return 0; |
435 | ||
436 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
437 | return -ENOMEM; | |
438 | ||
439 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 440 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
441 | |
442 | return 0; | |
443 | } | |
444 | ||
bf7cd94d JB |
445 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
446 | struct sk_buff *skb) | |
176f3608 TP |
447 | { |
448 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
449 | struct ieee80211_chanctx_conf *chanctx_conf; |
450 | struct ieee80211_channel *channel; | |
55de908a JB |
451 | struct ieee80211_supported_band *sband; |
452 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
453 | u8 *pos; |
454 | ||
55de908a JB |
455 | rcu_read_lock(); |
456 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
457 | if (WARN_ON(!chanctx_conf)) { | |
458 | rcu_read_unlock(); | |
459 | return -EINVAL; | |
460 | } | |
4bf88530 | 461 | channel = chanctx_conf->def.chan; |
55de908a JB |
462 | rcu_read_unlock(); |
463 | ||
464 | sband = local->hw.wiphy->bands[channel->band]; | |
465 | ht_cap = &sband->ht_cap; | |
466 | ||
c85fb53c BC |
467 | if (!ht_cap->ht_supported || |
468 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
469 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
470 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
176f3608 TP |
471 | return 0; |
472 | ||
074d46d1 | 473 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
474 | return -ENOMEM; |
475 | ||
074d46d1 | 476 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 477 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
57f255f5 AN |
478 | sdata->vif.bss_conf.ht_operation_mode, |
479 | false); | |
176f3608 TP |
480 | |
481 | return 0; | |
482 | } | |
bf7cd94d | 483 | |
c85fb53c BC |
484 | int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata, |
485 | struct sk_buff *skb) | |
486 | { | |
487 | struct ieee80211_local *local = sdata->local; | |
57fbcce3 | 488 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
c85fb53c BC |
489 | struct ieee80211_supported_band *sband; |
490 | u8 *pos; | |
491 | ||
492 | sband = local->hw.wiphy->bands[band]; | |
493 | if (!sband->vht_cap.vht_supported || | |
494 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
495 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
496 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
497 | return 0; | |
498 | ||
499 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) | |
500 | return -ENOMEM; | |
501 | ||
502 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); | |
503 | ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, sband->vht_cap.cap); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata, | |
509 | struct sk_buff *skb) | |
510 | { | |
511 | struct ieee80211_local *local = sdata->local; | |
512 | struct ieee80211_chanctx_conf *chanctx_conf; | |
513 | struct ieee80211_channel *channel; | |
514 | struct ieee80211_supported_band *sband; | |
515 | struct ieee80211_sta_vht_cap *vht_cap; | |
516 | u8 *pos; | |
517 | ||
518 | rcu_read_lock(); | |
519 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
520 | if (WARN_ON(!chanctx_conf)) { | |
521 | rcu_read_unlock(); | |
522 | return -EINVAL; | |
523 | } | |
524 | channel = chanctx_conf->def.chan; | |
525 | rcu_read_unlock(); | |
526 | ||
527 | sband = local->hw.wiphy->bands[channel->band]; | |
528 | vht_cap = &sband->vht_cap; | |
529 | ||
530 | if (!vht_cap->vht_supported || | |
531 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT || | |
532 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 || | |
533 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_10) | |
534 | return 0; | |
535 | ||
536 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_operation)) | |
537 | return -ENOMEM; | |
538 | ||
539 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); | |
540 | ieee80211_ie_build_vht_oper(pos, vht_cap, | |
541 | &sdata->vif.bss_conf.chandef); | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
2e3c8736 LCC |
546 | static void ieee80211_mesh_path_timer(unsigned long data) |
547 | { | |
548 | struct ieee80211_sub_if_data *sdata = | |
549 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 550 | |
690205f1 | 551 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
552 | } |
553 | ||
e304bfd3 RP |
554 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
555 | { | |
556 | struct ieee80211_sub_if_data *sdata = | |
557 | (struct ieee80211_sub_if_data *) data; | |
558 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
559 | |
560 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
561 | ||
690205f1 | 562 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
563 | } |
564 | ||
63c5723b RP |
565 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
566 | { | |
dbb912cd | 567 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
568 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
569 | else { | |
570 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
571 | /* stop running timer */ | |
572 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
573 | } | |
574 | } | |
575 | ||
3c5772a5 JC |
576 | /** |
577 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 578 | * @hdr: 802.11 frame header |
3c5772a5 JC |
579 | * @fc: frame control field |
580 | * @meshda: destination address in the mesh | |
581 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
582 | * locally originated. | |
583 | * | |
584 | * Return the length of the 802.11 (does not include a mesh control header) | |
585 | */ | |
15ff6365 JB |
586 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
587 | const u8 *meshda, const u8 *meshsa) | |
588 | { | |
3c5772a5 JC |
589 | if (is_multicast_ether_addr(meshda)) { |
590 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
591 | /* DA TA SA */ | |
592 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
593 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
594 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
595 | return 24; | |
596 | } else { | |
2154c81c | 597 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 | 598 | /* RA TA DA SA */ |
c84a67a2 | 599 | eth_zero_addr(hdr->addr1); /* RA is resolved later */ |
3c5772a5 JC |
600 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
601 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
602 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
603 | return 30; | |
604 | } | |
605 | } | |
606 | ||
902acc78 JB |
607 | /** |
608 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 609 | * @sdata: mesh interface to be used |
bf7cd94d | 610 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
611 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
612 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
613 | * be NULL. | |
614 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
615 | * mesh frame | |
902acc78 JB |
616 | * |
617 | * Return the header length. | |
618 | */ | |
5edfcee5 AH |
619 | unsigned int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
620 | struct ieee80211s_hdr *meshhdr, | |
621 | const char *addr4or5, const char *addr6) | |
902acc78 | 622 | { |
bf7cd94d JB |
623 | if (WARN_ON(!addr4or5 && addr6)) |
624 | return 0; | |
625 | ||
0c3cee72 | 626 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 627 | |
472dbc45 | 628 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
629 | |
630 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
631 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
632 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 633 | |
61ad5394 | 634 | if (addr4or5 && !addr6) { |
3c5772a5 | 635 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 636 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 637 | return 2 * ETH_ALEN; |
61ad5394 | 638 | } else if (addr4or5 && addr6) { |
3c5772a5 | 639 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
640 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
641 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 642 | return 3 * ETH_ALEN; |
3c5772a5 | 643 | } |
bf7cd94d JB |
644 | |
645 | return ETH_ALEN; | |
902acc78 JB |
646 | } |
647 | ||
bf7cd94d | 648 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 649 | { |
bf7cd94d | 650 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 651 | u32 changed; |
472dbc45 | 652 | |
31f909a2 MH |
653 | if (ifmsh->mshcfg.plink_timeout > 0) |
654 | ieee80211_sta_expire(sdata, ifmsh->mshcfg.plink_timeout * HZ); | |
472dbc45 JB |
655 | mesh_path_expire(sdata); |
656 | ||
df323818 | 657 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 658 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 659 | |
472dbc45 | 660 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
661 | round_jiffies(jiffies + |
662 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
663 | } |
664 | ||
e304bfd3 RP |
665 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
666 | { | |
667 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 668 | u32 interval; |
e304bfd3 RP |
669 | |
670 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
671 | |
672 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
673 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
674 | else | |
675 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
676 | ||
e304bfd3 | 677 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 678 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
679 | } |
680 | ||
2b5e1967 TP |
681 | static int |
682 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
683 | { | |
684 | struct beacon_data *bcn; | |
685 | int head_len, tail_len; | |
686 | struct sk_buff *skb; | |
687 | struct ieee80211_mgmt *mgmt; | |
688 | struct ieee80211_chanctx_conf *chanctx_conf; | |
b8456a14 | 689 | struct mesh_csa_settings *csa; |
57fbcce3 | 690 | enum nl80211_band band; |
2b5e1967 TP |
691 | u8 *pos; |
692 | struct ieee80211_sub_if_data *sdata; | |
693 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
694 | sizeof(mgmt->u.beacon); | |
695 | ||
696 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
697 | rcu_read_lock(); | |
698 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
699 | band = chanctx_conf->def.chan->band; | |
700 | rcu_read_unlock(); | |
701 | ||
702 | head_len = hdr_len + | |
703 | 2 + /* NULL SSID */ | |
b8456a14 CYY |
704 | /* Channel Switch Announcement */ |
705 | 2 + sizeof(struct ieee80211_channel_sw_ie) + | |
706 | /* Mesh Channel Swith Parameters */ | |
707 | 2 + sizeof(struct ieee80211_mesh_chansw_params_ie) + | |
2b5e1967 TP |
708 | 2 + 8 + /* supported rates */ |
709 | 2 + 3; /* DS params */ | |
710 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
711 | 2 + sizeof(struct ieee80211_ht_cap) + | |
712 | 2 + sizeof(struct ieee80211_ht_operation) + | |
713 | 2 + ifmsh->mesh_id_len + | |
714 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
715 | 2 + sizeof(__le16) + /* awake window */ | |
c85fb53c BC |
716 | 2 + sizeof(struct ieee80211_vht_cap) + |
717 | 2 + sizeof(struct ieee80211_vht_operation) + | |
2b5e1967 TP |
718 | ifmsh->ie_len; |
719 | ||
720 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
721 | /* need an skb for IE builders to operate on */ | |
722 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
723 | ||
724 | if (!bcn || !skb) | |
725 | goto out_free; | |
726 | ||
727 | /* | |
728 | * pointers go into the block we allocated, | |
729 | * memory is | beacon_data | head | tail | | |
730 | */ | |
731 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
732 | ||
733 | /* fill in the head */ | |
734 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
735 | memset(mgmt, 0, hdr_len); | |
736 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
737 | IEEE80211_STYPE_BEACON); | |
738 | eth_broadcast_addr(mgmt->da); | |
739 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
740 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
741 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
742 | mgmt->u.beacon.beacon_int = | |
743 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
744 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
745 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
746 | ||
747 | pos = skb_put(skb, 2); | |
748 | *pos++ = WLAN_EID_SSID; | |
749 | *pos++ = 0x0; | |
750 | ||
b8456a14 CYY |
751 | rcu_read_lock(); |
752 | csa = rcu_dereference(ifmsh->csa); | |
753 | if (csa) { | |
b8456a14 CYY |
754 | pos = skb_put(skb, 13); |
755 | memset(pos, 0, 13); | |
756 | *pos++ = WLAN_EID_CHANNEL_SWITCH; | |
757 | *pos++ = 3; | |
758 | *pos++ = 0x0; | |
759 | *pos++ = ieee80211_frequency_to_channel( | |
760 | csa->settings.chandef.chan->center_freq); | |
8df734e8 | 761 | bcn->csa_current_counter = csa->settings.count; |
af296bdb | 762 | bcn->csa_counter_offsets[0] = hdr_len + 6; |
b8456a14 CYY |
763 | *pos++ = csa->settings.count; |
764 | *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; | |
765 | *pos++ = 6; | |
0cb4d4dc | 766 | if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) { |
b8456a14 CYY |
767 | *pos++ = ifmsh->mshcfg.dot11MeshTTL; |
768 | *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
769 | } else { | |
770 | *pos++ = ifmsh->chsw_ttl; | |
771 | } | |
772 | *pos++ |= csa->settings.block_tx ? | |
773 | WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; | |
774 | put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); | |
775 | pos += 2; | |
ca91dc97 | 776 | put_unaligned_le16(ifmsh->pre_value, pos); |
b8456a14 CYY |
777 | pos += 2; |
778 | } | |
779 | rcu_read_unlock(); | |
780 | ||
2b5e1967 | 781 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || |
bf7cd94d | 782 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
783 | goto out_free; |
784 | ||
785 | bcn->head_len = skb->len; | |
786 | memcpy(bcn->head, skb->data, bcn->head_len); | |
787 | ||
788 | /* now the tail */ | |
789 | skb_trim(skb, 0); | |
790 | bcn->tail = bcn->head + bcn->head_len; | |
791 | ||
792 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
793 | mesh_add_rsn_ie(sdata, skb) || |
794 | mesh_add_ht_cap_ie(sdata, skb) || | |
795 | mesh_add_ht_oper_ie(sdata, skb) || | |
796 | mesh_add_meshid_ie(sdata, skb) || | |
797 | mesh_add_meshconf_ie(sdata, skb) || | |
798 | mesh_add_awake_window_ie(sdata, skb) || | |
c85fb53c BC |
799 | mesh_add_vht_cap_ie(sdata, skb) || |
800 | mesh_add_vht_oper_ie(sdata, skb) || | |
bf7cd94d | 801 | mesh_add_vendor_ies(sdata, skb)) |
2b5e1967 TP |
802 | goto out_free; |
803 | ||
804 | bcn->tail_len = skb->len; | |
805 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
43552be1 TP |
806 | bcn->meshconf = (struct ieee80211_meshconf_ie *) |
807 | (bcn->tail + ifmsh->meshconf_offset); | |
2b5e1967 TP |
808 | |
809 | dev_kfree_skb(skb); | |
810 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
811 | return 0; | |
812 | out_free: | |
813 | kfree(bcn); | |
814 | dev_kfree_skb(skb); | |
815 | return -ENOMEM; | |
816 | } | |
817 | ||
818 | static int | |
8d61ffa5 | 819 | ieee80211_mesh_rebuild_beacon(struct ieee80211_sub_if_data *sdata) |
2b5e1967 | 820 | { |
2b5e1967 TP |
821 | struct beacon_data *old_bcn; |
822 | int ret; | |
2b5e1967 | 823 | |
8d61ffa5 JB |
824 | old_bcn = rcu_dereference_protected(sdata->u.mesh.beacon, |
825 | lockdep_is_held(&sdata->wdev.mtx)); | |
826 | ret = ieee80211_mesh_build_beacon(&sdata->u.mesh); | |
2b5e1967 TP |
827 | if (ret) |
828 | /* just reuse old beacon */ | |
8d61ffa5 | 829 | return ret; |
2b5e1967 TP |
830 | |
831 | if (old_bcn) | |
832 | kfree_rcu(old_bcn, rcu_head); | |
8d61ffa5 | 833 | return 0; |
2b5e1967 TP |
834 | } |
835 | ||
836 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
837 | u32 changed) | |
838 | { | |
f81a9ded TP |
839 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
840 | unsigned long bits = changed; | |
841 | u32 bit; | |
842 | ||
843 | if (!bits) | |
844 | return; | |
845 | ||
846 | /* if we race with running work, worst case this work becomes a noop */ | |
847 | for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE) | |
848 | set_bit(bit, &ifmsh->mbss_changed); | |
849 | set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags); | |
850 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); | |
2b5e1967 TP |
851 | } |
852 | ||
853 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
854 | { |
855 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
856 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
857 | u32 changed = BSS_CHANGED_BEACON | |
858 | BSS_CHANGED_BEACON_ENABLED | | |
859 | BSS_CHANGED_HT | | |
860 | BSS_CHANGED_BASIC_RATES | | |
861 | BSS_CHANGED_BEACON_INT; | |
472dbc45 | 862 | |
09b17470 JB |
863 | local->fif_other_bss++; |
864 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
865 | atomic_inc(&local->iff_allmultis); | |
866 | ieee80211_configure_filter(local); | |
867 | ||
c7108a71 | 868 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
dbf498fb JC |
869 | /* register sync ops from extensible synchronization framework */ |
870 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
871 | ifmsh->adjusting_tbtt = false; | |
872 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 873 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 874 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 875 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
876 | sdata->vif.bss_conf.ht_operation_mode = |
877 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 878 | sdata->vif.bss_conf.enable_beacon = true; |
f4eabc91 | 879 | |
39886b61 | 880 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 881 | |
2b5e1967 TP |
882 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
883 | ieee80211_stop_mesh(sdata); | |
884 | return -ENOMEM; | |
885 | } | |
886 | ||
057d5f4b | 887 | ieee80211_recalc_dtim(local, sdata); |
f4eabc91 | 888 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
889 | |
890 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 891 | return 0; |
472dbc45 JB |
892 | } |
893 | ||
894 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
895 | { | |
09b17470 | 896 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 897 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 898 | struct beacon_data *bcn; |
29cbe68c | 899 | |
c405c629 JB |
900 | netif_carrier_off(sdata->dev); |
901 | ||
0d466b9c | 902 | /* stop the beacon */ |
29cbe68c | 903 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
904 | sdata->vif.bss_conf.enable_beacon = false; |
905 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 906 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 | 907 | bcn = rcu_dereference_protected(ifmsh->beacon, |
8d61ffa5 | 908 | lockdep_is_held(&sdata->wdev.mtx)); |
0c2bef46 | 909 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
2b5e1967 | 910 | kfree_rcu(bcn, rcu_head); |
0d466b9c TP |
911 | |
912 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 913 | sta_info_flush(sdata); |
0d466b9c | 914 | mesh_path_flush_by_iface(sdata); |
09b17470 | 915 | |
3f52b7e3 MP |
916 | /* free all potentially still buffered group-addressed frames */ |
917 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
918 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
919 | ||
472dbc45 | 920 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 921 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 922 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
09b17470 | 923 | |
f81a9ded TP |
924 | /* clear any mesh work (for next join) we may have accrued */ |
925 | ifmsh->wrkq_flags = 0; | |
926 | ifmsh->mbss_changed = 0; | |
927 | ||
09b17470 JB |
928 | local->fif_other_bss--; |
929 | atomic_dec(&local->iff_allmultis); | |
930 | ieee80211_configure_filter(local); | |
472dbc45 JB |
931 | } |
932 | ||
33a45867 CYY |
933 | static bool |
934 | ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, | |
935 | struct ieee802_11_elems *elems, bool beacon) | |
936 | { | |
937 | struct cfg80211_csa_settings params; | |
938 | struct ieee80211_csa_ie csa_ie; | |
33a45867 | 939 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
57fbcce3 | 940 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
0cb4d4dc | 941 | int err; |
33a45867 CYY |
942 | u32 sta_flags; |
943 | ||
dbd72850 MK |
944 | sdata_assert_lock(sdata); |
945 | ||
33a45867 CYY |
946 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
947 | switch (sdata->vif.bss_conf.chandef.width) { | |
948 | case NL80211_CHAN_WIDTH_20_NOHT: | |
949 | sta_flags |= IEEE80211_STA_DISABLE_HT; | |
950 | case NL80211_CHAN_WIDTH_20: | |
951 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; | |
952 | break; | |
953 | default: | |
954 | break; | |
955 | } | |
956 | ||
957 | memset(¶ms, 0, sizeof(params)); | |
958 | memset(&csa_ie, 0, sizeof(csa_ie)); | |
84469a45 | 959 | err = ieee80211_parse_ch_switch_ie(sdata, elems, band, |
33a45867 CYY |
960 | sta_flags, sdata->vif.addr, |
961 | &csa_ie); | |
962 | if (err < 0) | |
963 | return false; | |
964 | if (err) | |
965 | return false; | |
966 | ||
967 | params.chandef = csa_ie.chandef; | |
968 | params.count = csa_ie.count; | |
969 | ||
33a45867 CYY |
970 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, |
971 | IEEE80211_CHAN_DISABLED)) { | |
972 | sdata_info(sdata, | |
973 | "mesh STA %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), aborting\n", | |
974 | sdata->vif.addr, | |
975 | params.chandef.chan->center_freq, | |
976 | params.chandef.width, | |
977 | params.chandef.center_freq1, | |
978 | params.chandef.center_freq2); | |
979 | return false; | |
980 | } | |
981 | ||
982 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, | |
2beb6dab LC |
983 | ¶ms.chandef, |
984 | NL80211_IFTYPE_MESH_POINT); | |
33a45867 CYY |
985 | if (err < 0) |
986 | return false; | |
2beb6dab | 987 | if (err > 0) |
33a45867 CYY |
988 | /* TODO: DFS not (yet) supported */ |
989 | return false; | |
2beb6dab LC |
990 | |
991 | params.radar_required = err; | |
33a45867 | 992 | |
0cb4d4dc LC |
993 | if (cfg80211_chandef_identical(¶ms.chandef, |
994 | &sdata->vif.bss_conf.chandef)) { | |
995 | mcsa_dbg(sdata, | |
996 | "received csa with an identical chandef, ignoring\n"); | |
997 | return true; | |
998 | } | |
33a45867 CYY |
999 | |
1000 | mcsa_dbg(sdata, | |
1001 | "received channel switch announcement to go to channel %d MHz\n", | |
1002 | params.chandef.chan->center_freq); | |
1003 | ||
1004 | params.block_tx = csa_ie.mode & WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT; | |
3f718fd8 | 1005 | if (beacon) { |
33a45867 | 1006 | ifmsh->chsw_ttl = csa_ie.ttl - 1; |
3f718fd8 CYY |
1007 | if (ifmsh->pre_value >= csa_ie.pre_value) |
1008 | return false; | |
1009 | ifmsh->pre_value = csa_ie.pre_value; | |
1010 | } | |
33a45867 | 1011 | |
0cb4d4dc | 1012 | if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL) |
3f718fd8 | 1013 | return false; |
33a45867 | 1014 | |
0cb4d4dc | 1015 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER; |
33a45867 | 1016 | |
0cb4d4dc LC |
1017 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
1018 | ¶ms) < 0) | |
1019 | return false; | |
33a45867 CYY |
1020 | |
1021 | return true; | |
33a45867 CYY |
1022 | } |
1023 | ||
9fb04b50 TP |
1024 | static void |
1025 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
1026 | struct ieee80211_mgmt *mgmt, size_t len) | |
1027 | { | |
1028 | struct ieee80211_local *local = sdata->local; | |
1029 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1030 | struct sk_buff *presp; | |
1031 | struct beacon_data *bcn; | |
1032 | struct ieee80211_mgmt *hdr; | |
1033 | struct ieee802_11_elems elems; | |
1034 | size_t baselen; | |
511044ea | 1035 | u8 *pos; |
9fb04b50 | 1036 | |
9fb04b50 TP |
1037 | pos = mgmt->u.probe_req.variable; |
1038 | baselen = (u8 *) pos - (u8 *) mgmt; | |
1039 | if (baselen > len) | |
1040 | return; | |
1041 | ||
b2e506bf | 1042 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 | 1043 | |
a4ef66a9 CYY |
1044 | if (!elems.mesh_id) |
1045 | return; | |
1046 | ||
9fb04b50 TP |
1047 | /* 802.11-2012 10.1.4.3.2 */ |
1048 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
1049 | !is_broadcast_ether_addr(mgmt->da)) || | |
1050 | elems.ssid_len != 0) | |
1051 | return; | |
1052 | ||
1053 | if (elems.mesh_id_len != 0 && | |
1054 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
1055 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
1056 | return; | |
1057 | ||
1058 | rcu_read_lock(); | |
1059 | bcn = rcu_dereference(ifmsh->beacon); | |
1060 | ||
1061 | if (!bcn) | |
1062 | goto out; | |
1063 | ||
1064 | presp = dev_alloc_skb(local->tx_headroom + | |
1065 | bcn->head_len + bcn->tail_len); | |
1066 | if (!presp) | |
1067 | goto out; | |
1068 | ||
1069 | skb_reserve(presp, local->tx_headroom); | |
1070 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
1071 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
1072 | hdr = (struct ieee80211_mgmt *) presp->data; | |
1073 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
1074 | IEEE80211_STYPE_PROBE_RESP); | |
1075 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
1076 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
1077 | ieee80211_tx_skb(sdata, presp); | |
1078 | out: | |
1079 | rcu_read_unlock(); | |
1080 | } | |
1081 | ||
472dbc45 JB |
1082 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
1083 | u16 stype, | |
1084 | struct ieee80211_mgmt *mgmt, | |
1085 | size_t len, | |
1086 | struct ieee80211_rx_status *rx_status) | |
1087 | { | |
c6a1fa12 | 1088 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 1089 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
1090 | struct ieee802_11_elems elems; |
1091 | struct ieee80211_channel *channel; | |
472dbc45 JB |
1092 | size_t baselen; |
1093 | int freq; | |
57fbcce3 | 1094 | enum nl80211_band band = rx_status->band; |
472dbc45 JB |
1095 | |
1096 | /* ignore ProbeResp to foreign address */ | |
1097 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 1098 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
1099 | return; |
1100 | ||
1101 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
1102 | if (baselen > len) | |
1103 | return; | |
1104 | ||
1105 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 1106 | false, &elems); |
472dbc45 | 1107 | |
9a90bc81 TP |
1108 | /* ignore non-mesh or secure / unsecure mismatch */ |
1109 | if ((!elems.mesh_id || !elems.mesh_config) || | |
1110 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
1111 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
1112 | return; |
1113 | ||
1cd8e88e | 1114 | if (elems.ds_params) |
59eb21a6 | 1115 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
1116 | else |
1117 | freq = rx_status->freq; | |
1118 | ||
1119 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
1120 | ||
1121 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
1122 | return; | |
1123 | ||
9a90bc81 | 1124 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 1125 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
1126 | |
1127 | if (ifmsh->sync_ops) | |
1128 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
1129 | stype, mgmt, &elems, rx_status); | |
33a45867 | 1130 | |
0cb4d4dc LC |
1131 | if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && |
1132 | !sdata->vif.csa_active) | |
33a45867 | 1133 | ieee80211_mesh_process_chnswitch(sdata, &elems, true); |
472dbc45 JB |
1134 | } |
1135 | ||
b8456a14 CYY |
1136 | int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) |
1137 | { | |
1138 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1139 | struct mesh_csa_settings *tmp_csa_settings; | |
1140 | int ret = 0; | |
faf046e7 | 1141 | int changed = 0; |
b8456a14 CYY |
1142 | |
1143 | /* Reset the TTL value and Initiator flag */ | |
0cb4d4dc | 1144 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
b8456a14 CYY |
1145 | ifmsh->chsw_ttl = 0; |
1146 | ||
1147 | /* Remove the CSA and MCSP elements from the beacon */ | |
1148 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1149 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
66e01cf9 LC |
1150 | if (tmp_csa_settings) |
1151 | kfree_rcu(tmp_csa_settings, rcu_head); | |
b8456a14 CYY |
1152 | ret = ieee80211_mesh_rebuild_beacon(sdata); |
1153 | if (ret) | |
1154 | return -EINVAL; | |
1155 | ||
faf046e7 | 1156 | changed |= BSS_CHANGED_BEACON; |
b8456a14 CYY |
1157 | |
1158 | mcsa_dbg(sdata, "complete switching to center freq %d MHz", | |
1159 | sdata->vif.bss_conf.chandef.chan->center_freq); | |
faf046e7 | 1160 | return changed; |
b8456a14 CYY |
1161 | } |
1162 | ||
1163 | int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, | |
66e01cf9 | 1164 | struct cfg80211_csa_settings *csa_settings) |
b8456a14 CYY |
1165 | { |
1166 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1167 | struct mesh_csa_settings *tmp_csa_settings; | |
1168 | int ret = 0; | |
1169 | ||
1170 | tmp_csa_settings = kmalloc(sizeof(*tmp_csa_settings), | |
1171 | GFP_ATOMIC); | |
1172 | if (!tmp_csa_settings) | |
1173 | return -ENOMEM; | |
1174 | ||
1175 | memcpy(&tmp_csa_settings->settings, csa_settings, | |
1176 | sizeof(struct cfg80211_csa_settings)); | |
1177 | ||
1178 | rcu_assign_pointer(ifmsh->csa, tmp_csa_settings); | |
1179 | ||
1180 | ret = ieee80211_mesh_rebuild_beacon(sdata); | |
1181 | if (ret) { | |
1182 | tmp_csa_settings = rcu_dereference(ifmsh->csa); | |
0c2bef46 | 1183 | RCU_INIT_POINTER(ifmsh->csa, NULL); |
b8456a14 CYY |
1184 | kfree_rcu(tmp_csa_settings, rcu_head); |
1185 | return ret; | |
1186 | } | |
1187 | ||
b58e81e9 | 1188 | return BSS_CHANGED_BEACON; |
b8456a14 CYY |
1189 | } |
1190 | ||
8f2535b9 CYY |
1191 | static int mesh_fwd_csa_frame(struct ieee80211_sub_if_data *sdata, |
1192 | struct ieee80211_mgmt *mgmt, size_t len) | |
1193 | { | |
1194 | struct ieee80211_mgmt *mgmt_fwd; | |
1195 | struct sk_buff *skb; | |
1196 | struct ieee80211_local *local = sdata->local; | |
1197 | u8 *pos = mgmt->u.action.u.chan_switch.variable; | |
1198 | size_t offset_ttl; | |
1199 | ||
1200 | skb = dev_alloc_skb(local->tx_headroom + len); | |
1201 | if (!skb) | |
1202 | return -ENOMEM; | |
1203 | skb_reserve(skb, local->tx_headroom); | |
1204 | mgmt_fwd = (struct ieee80211_mgmt *) skb_put(skb, len); | |
1205 | ||
1206 | /* offset_ttl is based on whether the secondary channel | |
b314c669 | 1207 | * offset is available or not. Subtract 1 from the mesh TTL |
8f2535b9 CYY |
1208 | * and disable the initiator flag before forwarding. |
1209 | */ | |
1210 | offset_ttl = (len < 42) ? 7 : 10; | |
1211 | *(pos + offset_ttl) -= 1; | |
1212 | *(pos + offset_ttl + 1) &= ~WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; | |
1213 | ||
1214 | memcpy(mgmt_fwd, mgmt, len); | |
1215 | eth_broadcast_addr(mgmt_fwd->da); | |
1216 | memcpy(mgmt_fwd->sa, sdata->vif.addr, ETH_ALEN); | |
1217 | memcpy(mgmt_fwd->bssid, sdata->vif.addr, ETH_ALEN); | |
1218 | ||
1219 | ieee80211_tx_skb(sdata, skb); | |
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, | |
1224 | struct ieee80211_mgmt *mgmt, size_t len) | |
1225 | { | |
1226 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1227 | struct ieee802_11_elems elems; | |
1228 | u16 pre_value; | |
33a45867 | 1229 | bool fwd_csa = true; |
8f2535b9 | 1230 | size_t baselen; |
3f718fd8 | 1231 | u8 *pos; |
8f2535b9 CYY |
1232 | |
1233 | if (mgmt->u.action.u.measurement.action_code != | |
1234 | WLAN_ACTION_SPCT_CHL_SWITCH) | |
1235 | return; | |
1236 | ||
1237 | pos = mgmt->u.action.u.chan_switch.variable; | |
1238 | baselen = offsetof(struct ieee80211_mgmt, | |
1239 | u.action.u.chan_switch.variable); | |
1240 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); | |
1241 | ||
3f718fd8 CYY |
1242 | ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; |
1243 | if (!--ifmsh->chsw_ttl) | |
8f2535b9 CYY |
1244 | fwd_csa = false; |
1245 | ||
1246 | pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); | |
1247 | if (ifmsh->pre_value >= pre_value) | |
1248 | return; | |
1249 | ||
1250 | ifmsh->pre_value = pre_value; | |
1251 | ||
0cb4d4dc LC |
1252 | if (!sdata->vif.csa_active && |
1253 | !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { | |
33a45867 CYY |
1254 | mcsa_dbg(sdata, "Failed to process CSA action frame"); |
1255 | return; | |
1256 | } | |
1257 | ||
8f2535b9 CYY |
1258 | /* forward or re-broadcast the CSA frame */ |
1259 | if (fwd_csa) { | |
1260 | if (mesh_fwd_csa_frame(sdata, mgmt, len) < 0) | |
1261 | mcsa_dbg(sdata, "Failed to forward the CSA frame"); | |
1262 | } | |
8f2535b9 CYY |
1263 | } |
1264 | ||
472dbc45 JB |
1265 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
1266 | struct ieee80211_mgmt *mgmt, | |
1267 | size_t len, | |
1268 | struct ieee80211_rx_status *rx_status) | |
1269 | { | |
1270 | switch (mgmt->u.action.category) { | |
8db09850 TP |
1271 | case WLAN_CATEGORY_SELF_PROTECTED: |
1272 | switch (mgmt->u.action.u.self_prot.action_code) { | |
1273 | case WLAN_SP_MESH_PEERING_OPEN: | |
1274 | case WLAN_SP_MESH_PEERING_CLOSE: | |
1275 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
1276 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
1277 | break; | |
1278 | } | |
472dbc45 | 1279 | break; |
25d49e4d TP |
1280 | case WLAN_CATEGORY_MESH_ACTION: |
1281 | if (mesh_action_is_path_sel(mgmt)) | |
1282 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 | 1283 | break; |
8f2535b9 CYY |
1284 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
1285 | mesh_rx_csa_frame(sdata, mgmt, len); | |
1286 | break; | |
472dbc45 JB |
1287 | } |
1288 | } | |
1289 | ||
1fa57d01 JB |
1290 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
1291 | struct sk_buff *skb) | |
472dbc45 JB |
1292 | { |
1293 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
1294 | struct ieee80211_mgmt *mgmt; |
1295 | u16 stype; | |
1296 | ||
ecccd072 TP |
1297 | sdata_lock(sdata); |
1298 | ||
1299 | /* mesh already went down */ | |
1693d344 | 1300 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1301 | goto out; |
1302 | ||
f1d58c25 | 1303 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
1304 | mgmt = (struct ieee80211_mgmt *) skb->data; |
1305 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
1306 | ||
1307 | switch (stype) { | |
1308 | case IEEE80211_STYPE_PROBE_RESP: | |
1309 | case IEEE80211_STYPE_BEACON: | |
1310 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
1311 | rx_status); | |
1312 | break; | |
9fb04b50 TP |
1313 | case IEEE80211_STYPE_PROBE_REQ: |
1314 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
1315 | break; | |
472dbc45 JB |
1316 | case IEEE80211_STYPE_ACTION: |
1317 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
1318 | break; | |
1319 | } | |
ecccd072 TP |
1320 | out: |
1321 | sdata_unlock(sdata); | |
472dbc45 JB |
1322 | } |
1323 | ||
f81a9ded TP |
1324 | static void mesh_bss_info_changed(struct ieee80211_sub_if_data *sdata) |
1325 | { | |
1326 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
1327 | u32 bit, changed = 0; | |
1328 | ||
1329 | for_each_set_bit(bit, &ifmsh->mbss_changed, | |
1330 | sizeof(changed) * BITS_PER_BYTE) { | |
1331 | clear_bit(bit, &ifmsh->mbss_changed); | |
1332 | changed |= BIT(bit); | |
1333 | } | |
1334 | ||
1335 | if (sdata->vif.bss_conf.enable_beacon && | |
1336 | (changed & (BSS_CHANGED_BEACON | | |
1337 | BSS_CHANGED_HT | | |
1338 | BSS_CHANGED_BASIC_RATES | | |
1339 | BSS_CHANGED_BEACON_INT))) | |
1340 | if (ieee80211_mesh_rebuild_beacon(sdata)) | |
1341 | return; | |
1342 | ||
1343 | ieee80211_bss_info_change_notify(sdata, changed); | |
1344 | } | |
1345 | ||
1fa57d01 | 1346 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 1347 | { |
472dbc45 | 1348 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 1349 | |
ecccd072 TP |
1350 | sdata_lock(sdata); |
1351 | ||
1352 | /* mesh already went down */ | |
1693d344 | 1353 | if (!sdata->u.mesh.mesh_id_len) |
ecccd072 TP |
1354 | goto out; |
1355 | ||
472dbc45 JB |
1356 | if (ifmsh->preq_queue_len && |
1357 | time_after(jiffies, | |
1358 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
1359 | mesh_path_start_discovery(sdata); | |
1360 | ||
18889231 | 1361 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
bf7cd94d | 1362 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
1363 | |
1364 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
1365 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1366 | |
1367 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1368 | mesh_sync_adjust_tbtt(sdata); | |
ecccd072 | 1369 | |
f81a9ded TP |
1370 | if (test_and_clear_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags)) |
1371 | mesh_bss_info_changed(sdata); | |
ecccd072 TP |
1372 | out: |
1373 | sdata_unlock(sdata); | |
472dbc45 JB |
1374 | } |
1375 | ||
472dbc45 | 1376 | |
902acc78 JB |
1377 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1378 | { | |
472dbc45 | 1379 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1380 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1381 | |
472dbc45 JB |
1382 | setup_timer(&ifmsh->housekeeping_timer, |
1383 | ieee80211_mesh_housekeeping_timer, | |
1384 | (unsigned long) sdata); | |
472dbc45 | 1385 | |
472dbc45 | 1386 | ifmsh->accepting_plinks = true; |
472dbc45 | 1387 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1388 | mesh_rmc_init(sdata); |
472dbc45 | 1389 | ifmsh->last_preq = jiffies; |
dca7e943 | 1390 | ifmsh->next_perr = jiffies; |
0cb4d4dc | 1391 | ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE; |
902acc78 JB |
1392 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1393 | if (!mesh_allocated) | |
1394 | ieee80211s_init(); | |
2bdaf386 BC |
1395 | |
1396 | mesh_pathtbl_init(sdata); | |
1397 | ||
472dbc45 | 1398 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1399 | ieee80211_mesh_path_timer, |
1400 | (unsigned long) sdata); | |
e304bfd3 RP |
1401 | setup_timer(&ifmsh->mesh_path_root_timer, |
1402 | ieee80211_mesh_path_root_timer, | |
1403 | (unsigned long) sdata); | |
472dbc45 | 1404 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1405 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1406 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1407 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 | 1408 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
ad2d223a JB |
1409 | |
1410 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1411 | } |
0371a08f BC |
1412 | |
1413 | void ieee80211_mesh_teardown_sdata(struct ieee80211_sub_if_data *sdata) | |
1414 | { | |
1415 | mesh_rmc_free(sdata); | |
1416 | mesh_pathtbl_unregister(sdata); | |
1417 | } |