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" | |
15 | ||
bf7cd94d | 16 | static int mesh_allocated; |
2e3c8736 LCC |
17 | static struct kmem_cache *rm_cache; |
18 | ||
25d49e4d TP |
19 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) |
20 | { | |
21 | return (mgmt->u.action.u.mesh_action.action_code == | |
22 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
23 | } | |
25d49e4d | 24 | |
2e3c8736 LCC |
25 | void ieee80211s_init(void) |
26 | { | |
27 | mesh_pathtbl_init(); | |
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 | mesh_pathtbl_unregister(); |
38 | kmem_cache_destroy(rm_cache); | |
39 | } | |
40 | ||
472dbc45 JB |
41 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
42 | { | |
43 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
44 | struct ieee80211_local *local = sdata->local; | |
45 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
46 | ||
6b9ac442 | 47 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 | 48 | |
64592c8f | 49 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
50 | } |
51 | ||
2e3c8736 LCC |
52 | /** |
53 | * mesh_matches_local - check if the config of a mesh point matches ours | |
54 | * | |
f698d856 | 55 | * @sdata: local mesh subif |
f743ff49 | 56 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
57 | * |
58 | * This function checks if the mesh configuration of a mesh point matches the | |
59 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
60 | */ | |
f743ff49 TP |
61 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
62 | struct ieee802_11_elems *ie) | |
2e3c8736 | 63 | { |
472dbc45 | 64 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
739522ba | 65 | struct ieee80211_local *local = sdata->local; |
f743ff49 | 66 | u32 basic_rates = 0; |
4bf88530 | 67 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 68 | |
2e3c8736 LCC |
69 | /* |
70 | * As support for each feature is added, check for matching | |
71 | * - On mesh config capabilities | |
72 | * - Power Save Support En | |
73 | * - Sync support enabled | |
74 | * - Sync support active | |
75 | * - Sync support required from peer | |
76 | * - MDA enabled | |
77 | * - Power management control on fc | |
78 | */ | |
739522ba TP |
79 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
80 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
81 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
82 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
83 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
84 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
85 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
bf7cd94d | 86 | return false; |
739522ba | 87 | |
55de908a | 88 | ieee80211_sta_get_rates(local, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
89 | &basic_rates); |
90 | ||
fe40cb62 | 91 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
bf7cd94d | 92 | return false; |
fe40cb62 | 93 | |
4bf88530 JB |
94 | ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
95 | ie->ht_operation, &sta_chan_def); | |
96 | ||
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; | |
151 | u32 changed; | |
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 | */ | |
158 | changed = mesh_accept_plinks_update(sdata); | |
a6dad6a2 | 159 | if (!sdata->u.mesh.user_mpm) { |
45b5028e TP |
160 | changed |= mesh_plink_deactivate(sta); |
161 | del_timer_sync(&sta->plink_timer); | |
162 | } | |
163 | ||
11d71499 BC |
164 | /* make sure no readers can access nexthop sta from here on */ |
165 | mesh_path_flush_by_nexthop(sta); | |
166 | synchronize_net(); | |
167 | ||
45b5028e | 168 | if (changed) |
2b5e1967 | 169 | ieee80211_mbss_info_change_notify(sdata, changed); |
45b5028e TP |
170 | } |
171 | ||
f698d856 | 172 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 173 | { |
2e3c8736 LCC |
174 | int i; |
175 | ||
472dbc45 JB |
176 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
177 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 178 | return -ENOMEM; |
472dbc45 | 179 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 180 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 181 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
182 | return 0; |
183 | } | |
184 | ||
f698d856 | 185 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 186 | { |
472dbc45 | 187 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
188 | struct rmc_entry *p, *n; |
189 | int i; | |
190 | ||
472dbc45 | 191 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
192 | return; |
193 | ||
bf7cd94d | 194 | for (i = 0; i < RMC_BUCKETS; i++) { |
b7cfcd11 | 195 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
196 | list_del(&p->list); |
197 | kmem_cache_free(rm_cache, p); | |
198 | } | |
bf7cd94d | 199 | } |
2e3c8736 LCC |
200 | |
201 | kfree(rmc); | |
472dbc45 | 202 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
203 | } |
204 | ||
205 | /** | |
206 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
207 | * | |
bf7cd94d | 208 | * @sdata: interface |
2e3c8736 LCC |
209 | * @sa: source address |
210 | * @mesh_hdr: mesh_header | |
211 | * | |
212 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
213 | * | |
214 | * Checks using the source address and the mesh sequence number if we have | |
215 | * received this frame lately. If the frame is not in the cache, it is added to | |
216 | * it. | |
217 | */ | |
bf7cd94d JB |
218 | int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, |
219 | const u8 *sa, struct ieee80211s_hdr *mesh_hdr) | |
2e3c8736 | 220 | { |
472dbc45 | 221 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
222 | u32 seqnum = 0; |
223 | int entries = 0; | |
224 | u8 idx; | |
225 | struct rmc_entry *p, *n; | |
226 | ||
227 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
228 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
229 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
b7cfcd11 | 230 | list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
231 | ++entries; |
232 | if (time_after(jiffies, p->exp_time) || | |
bf7cd94d | 233 | entries == RMC_QUEUE_MAX_LEN) { |
2e3c8736 LCC |
234 | list_del(&p->list); |
235 | kmem_cache_free(rm_cache, p); | |
236 | --entries; | |
bf7cd94d | 237 | } else if ((seqnum == p->seqnum) && ether_addr_equal(sa, p->sa)) |
2e3c8736 LCC |
238 | return -1; |
239 | } | |
240 | ||
241 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 242 | if (!p) |
2e3c8736 | 243 | return 0; |
d15b8459 | 244 | |
2e3c8736 LCC |
245 | p->seqnum = seqnum; |
246 | p->exp_time = jiffies + RMC_TIMEOUT; | |
247 | memcpy(p->sa, sa, ETH_ALEN); | |
b7cfcd11 | 248 | list_add(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
249 | return 0; |
250 | } | |
251 | ||
bf7cd94d JB |
252 | int mesh_add_meshconf_ie(struct ieee80211_sub_if_data *sdata, |
253 | struct sk_buff *skb) | |
082ebb0c TP |
254 | { |
255 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
256 | u8 *pos, neighbors; | |
257 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
258 | ||
259 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
260 | return -ENOMEM; | |
261 | ||
262 | pos = skb_put(skb, 2 + meshconf_len); | |
263 | *pos++ = WLAN_EID_MESH_CONFIG; | |
264 | *pos++ = meshconf_len; | |
265 | ||
266 | /* Active path selection protocol ID */ | |
267 | *pos++ = ifmsh->mesh_pp_id; | |
268 | /* Active path selection metric ID */ | |
269 | *pos++ = ifmsh->mesh_pm_id; | |
270 | /* Congestion control mode identifier */ | |
271 | *pos++ = ifmsh->mesh_cc_id; | |
272 | /* Synchronization protocol identifier */ | |
273 | *pos++ = ifmsh->mesh_sp_id; | |
274 | /* Authentication Protocol identifier */ | |
275 | *pos++ = ifmsh->mesh_auth_id; | |
276 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 277 | neighbors = atomic_read(&ifmsh->estab_plinks); |
082ebb0c TP |
278 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
279 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
280 | *pos++ = neighbors << 1; | |
281 | /* Mesh capability */ | |
65821635 | 282 | *pos = IEEE80211_MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 283 | *pos |= ifmsh->accepting_plinks ? |
bf7cd94d | 284 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
3f52b7e3 MP |
285 | /* Mesh PS mode. See IEEE802.11-2012 8.4.2.100.8 */ |
286 | *pos |= ifmsh->ps_peers_deep_sleep ? | |
bf7cd94d | 287 | IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL : 0x00; |
dbf498fb | 288 | *pos++ |= ifmsh->adjusting_tbtt ? |
bf7cd94d | 289 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
290 | *pos++ = 0x00; |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
bf7cd94d | 295 | int mesh_add_meshid_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
296 | { |
297 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
298 | u8 *pos; | |
299 | ||
300 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
301 | return -ENOMEM; | |
302 | ||
303 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
304 | *pos++ = WLAN_EID_MESH_ID; | |
305 | *pos++ = ifmsh->mesh_id_len; | |
306 | if (ifmsh->mesh_id_len) | |
307 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
bf7cd94d JB |
312 | static int mesh_add_awake_window_ie(struct ieee80211_sub_if_data *sdata, |
313 | struct sk_buff *skb) | |
3f52b7e3 MP |
314 | { |
315 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
316 | u8 *pos; | |
317 | ||
318 | /* see IEEE802.11-2012 13.14.6 */ | |
319 | if (ifmsh->ps_peers_light_sleep == 0 && | |
320 | ifmsh->ps_peers_deep_sleep == 0 && | |
321 | ifmsh->nonpeer_pm == NL80211_MESH_POWER_ACTIVE) | |
322 | return 0; | |
323 | ||
324 | if (skb_tailroom(skb) < 4) | |
325 | return -ENOMEM; | |
326 | ||
327 | pos = skb_put(skb, 2 + 2); | |
328 | *pos++ = WLAN_EID_MESH_AWAKE_WINDOW; | |
329 | *pos++ = 2; | |
330 | put_unaligned_le16(ifmsh->mshcfg.dot11MeshAwakeWindowDuration, pos); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
bf7cd94d JB |
335 | int mesh_add_vendor_ies(struct ieee80211_sub_if_data *sdata, |
336 | struct sk_buff *skb) | |
082ebb0c TP |
337 | { |
338 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
339 | u8 offset, len; | |
340 | const u8 *data; | |
341 | ||
342 | if (!ifmsh->ie || !ifmsh->ie_len) | |
343 | return 0; | |
344 | ||
345 | /* fast-forward to vendor IEs */ | |
346 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
347 | ||
348 | if (offset) { | |
349 | len = ifmsh->ie_len - offset; | |
350 | data = ifmsh->ie + offset; | |
351 | if (skb_tailroom(skb) < len) | |
352 | return -ENOMEM; | |
353 | memcpy(skb_put(skb, len), data, len); | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
bf7cd94d | 359 | int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
082ebb0c TP |
360 | { |
361 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
362 | u8 len = 0; | |
363 | const u8 *data; | |
364 | ||
365 | if (!ifmsh->ie || !ifmsh->ie_len) | |
366 | return 0; | |
367 | ||
368 | /* find RSN IE */ | |
369 | data = ifmsh->ie; | |
370 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
371 | if (*data == WLAN_EID_RSN) { | |
372 | len = data[1] + 2; | |
373 | break; | |
374 | } | |
375 | data++; | |
376 | } | |
377 | ||
378 | if (len) { | |
379 | if (skb_tailroom(skb) < len) | |
380 | return -ENOMEM; | |
381 | memcpy(skb_put(skb, len), data, len); | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
bf7cd94d JB |
387 | static int mesh_add_ds_params_ie(struct ieee80211_sub_if_data *sdata, |
388 | struct sk_buff *skb) | |
082ebb0c | 389 | { |
55de908a JB |
390 | struct ieee80211_chanctx_conf *chanctx_conf; |
391 | struct ieee80211_channel *chan; | |
082ebb0c | 392 | u8 *pos; |
2e3c8736 | 393 | |
082ebb0c TP |
394 | if (skb_tailroom(skb) < 3) |
395 | return -ENOMEM; | |
396 | ||
55de908a JB |
397 | rcu_read_lock(); |
398 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
399 | if (WARN_ON(!chanctx_conf)) { | |
400 | rcu_read_unlock(); | |
401 | return -EINVAL; | |
402 | } | |
4bf88530 | 403 | chan = chanctx_conf->def.chan; |
55de908a JB |
404 | rcu_read_unlock(); |
405 | ||
601513aa ET |
406 | pos = skb_put(skb, 2 + 1); |
407 | *pos++ = WLAN_EID_DS_PARAMS; | |
408 | *pos++ = 1; | |
409 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); | |
be125c60 | 410 | |
082ebb0c | 411 | return 0; |
2e3c8736 LCC |
412 | } |
413 | ||
bf7cd94d JB |
414 | int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata, |
415 | struct sk_buff *skb) | |
176f3608 TP |
416 | { |
417 | struct ieee80211_local *local = sdata->local; | |
55de908a | 418 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
419 | struct ieee80211_supported_band *sband; |
420 | u8 *pos; | |
421 | ||
55de908a | 422 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 423 | if (!sband->ht_cap.ht_supported || |
4bf88530 | 424 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) |
176f3608 TP |
425 | return 0; |
426 | ||
427 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
428 | return -ENOMEM; | |
429 | ||
430 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 431 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
432 | |
433 | return 0; | |
434 | } | |
435 | ||
bf7cd94d JB |
436 | int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata, |
437 | struct sk_buff *skb) | |
176f3608 TP |
438 | { |
439 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
440 | struct ieee80211_chanctx_conf *chanctx_conf; |
441 | struct ieee80211_channel *channel; | |
466f310d | 442 | enum nl80211_channel_type channel_type = |
4bf88530 | 443 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
55de908a JB |
444 | struct ieee80211_supported_band *sband; |
445 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
446 | u8 *pos; |
447 | ||
55de908a JB |
448 | rcu_read_lock(); |
449 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
450 | if (WARN_ON(!chanctx_conf)) { | |
451 | rcu_read_unlock(); | |
452 | return -EINVAL; | |
453 | } | |
4bf88530 | 454 | channel = chanctx_conf->def.chan; |
55de908a JB |
455 | rcu_read_unlock(); |
456 | ||
457 | sband = local->hw.wiphy->bands[channel->band]; | |
458 | ht_cap = &sband->ht_cap; | |
459 | ||
176f3608 TP |
460 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
461 | return 0; | |
462 | ||
074d46d1 | 463 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
464 | return -ENOMEM; |
465 | ||
074d46d1 | 466 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 467 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 468 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
469 | |
470 | return 0; | |
471 | } | |
bf7cd94d | 472 | |
2e3c8736 LCC |
473 | static void ieee80211_mesh_path_timer(unsigned long data) |
474 | { | |
475 | struct ieee80211_sub_if_data *sdata = | |
476 | (struct ieee80211_sub_if_data *) data; | |
5bb644a0 | 477 | |
690205f1 | 478 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
2e3c8736 LCC |
479 | } |
480 | ||
e304bfd3 RP |
481 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
482 | { | |
483 | struct ieee80211_sub_if_data *sdata = | |
484 | (struct ieee80211_sub_if_data *) data; | |
485 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
e304bfd3 RP |
486 | |
487 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
488 | ||
690205f1 | 489 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
e304bfd3 RP |
490 | } |
491 | ||
63c5723b RP |
492 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
493 | { | |
dbb912cd | 494 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
495 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
496 | else { | |
497 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
498 | /* stop running timer */ | |
499 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
500 | } | |
501 | } | |
502 | ||
3c5772a5 JC |
503 | /** |
504 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
bf7cd94d | 505 | * @hdr: 802.11 frame header |
3c5772a5 JC |
506 | * @fc: frame control field |
507 | * @meshda: destination address in the mesh | |
508 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
509 | * locally originated. | |
510 | * | |
511 | * Return the length of the 802.11 (does not include a mesh control header) | |
512 | */ | |
15ff6365 JB |
513 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
514 | const u8 *meshda, const u8 *meshsa) | |
515 | { | |
3c5772a5 JC |
516 | if (is_multicast_ether_addr(meshda)) { |
517 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
518 | /* DA TA SA */ | |
519 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
520 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
521 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
522 | return 24; | |
523 | } else { | |
2154c81c | 524 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
525 | /* RA TA DA SA */ |
526 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
527 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
528 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
529 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
530 | return 30; | |
531 | } | |
532 | } | |
533 | ||
902acc78 JB |
534 | /** |
535 | * ieee80211_new_mesh_header - create a new mesh header | |
902acc78 | 536 | * @sdata: mesh interface to be used |
bf7cd94d | 537 | * @meshhdr: uninitialized mesh header |
61ad5394 JC |
538 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
539 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
540 | * be NULL. | |
541 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
542 | * mesh frame | |
902acc78 JB |
543 | * |
544 | * Return the header length. | |
545 | */ | |
bf7cd94d JB |
546 | int ieee80211_new_mesh_header(struct ieee80211_sub_if_data *sdata, |
547 | struct ieee80211s_hdr *meshhdr, | |
548 | const char *addr4or5, const char *addr6) | |
902acc78 | 549 | { |
bf7cd94d JB |
550 | if (WARN_ON(!addr4or5 && addr6)) |
551 | return 0; | |
552 | ||
0c3cee72 | 553 | memset(meshhdr, 0, sizeof(*meshhdr)); |
bf7cd94d | 554 | |
472dbc45 | 555 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
bf7cd94d JB |
556 | |
557 | /* FIXME: racy -- TX on multiple queues can be concurrent */ | |
472dbc45 JB |
558 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
559 | sdata->u.mesh.mesh_seqnum++; | |
bf7cd94d | 560 | |
61ad5394 | 561 | if (addr4or5 && !addr6) { |
3c5772a5 | 562 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
61ad5394 | 563 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
bf7cd94d | 564 | return 2 * ETH_ALEN; |
61ad5394 | 565 | } else if (addr4or5 && addr6) { |
3c5772a5 | 566 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
61ad5394 JC |
567 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
568 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
bf7cd94d | 569 | return 3 * ETH_ALEN; |
3c5772a5 | 570 | } |
bf7cd94d JB |
571 | |
572 | return ETH_ALEN; | |
902acc78 JB |
573 | } |
574 | ||
bf7cd94d | 575 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 576 | { |
bf7cd94d | 577 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
df323818 | 578 | u32 changed; |
472dbc45 | 579 | |
472dbc45 JB |
580 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
581 | mesh_path_expire(sdata); | |
582 | ||
df323818 | 583 | changed = mesh_accept_plinks_update(sdata); |
2b5e1967 | 584 | ieee80211_mbss_info_change_notify(sdata, changed); |
472dbc45 | 585 | |
472dbc45 | 586 | mod_timer(&ifmsh->housekeeping_timer, |
bf7cd94d JB |
587 | round_jiffies(jiffies + |
588 | IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
472dbc45 JB |
589 | } |
590 | ||
e304bfd3 RP |
591 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
592 | { | |
593 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 594 | u32 interval; |
e304bfd3 RP |
595 | |
596 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
597 | |
598 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
599 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
600 | else | |
601 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
602 | ||
e304bfd3 | 603 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 604 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
605 | } |
606 | ||
2b5e1967 TP |
607 | static int |
608 | ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) | |
609 | { | |
610 | struct beacon_data *bcn; | |
611 | int head_len, tail_len; | |
612 | struct sk_buff *skb; | |
613 | struct ieee80211_mgmt *mgmt; | |
614 | struct ieee80211_chanctx_conf *chanctx_conf; | |
615 | enum ieee80211_band band; | |
616 | u8 *pos; | |
617 | struct ieee80211_sub_if_data *sdata; | |
618 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + | |
619 | sizeof(mgmt->u.beacon); | |
620 | ||
621 | sdata = container_of(ifmsh, struct ieee80211_sub_if_data, u.mesh); | |
622 | rcu_read_lock(); | |
623 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
624 | band = chanctx_conf->def.chan->band; | |
625 | rcu_read_unlock(); | |
626 | ||
627 | head_len = hdr_len + | |
628 | 2 + /* NULL SSID */ | |
629 | 2 + 8 + /* supported rates */ | |
630 | 2 + 3; /* DS params */ | |
631 | tail_len = 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
632 | 2 + sizeof(struct ieee80211_ht_cap) + | |
633 | 2 + sizeof(struct ieee80211_ht_operation) + | |
634 | 2 + ifmsh->mesh_id_len + | |
635 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
636 | 2 + sizeof(__le16) + /* awake window */ | |
637 | ifmsh->ie_len; | |
638 | ||
639 | bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL); | |
640 | /* need an skb for IE builders to operate on */ | |
641 | skb = dev_alloc_skb(max(head_len, tail_len)); | |
642 | ||
643 | if (!bcn || !skb) | |
644 | goto out_free; | |
645 | ||
646 | /* | |
647 | * pointers go into the block we allocated, | |
648 | * memory is | beacon_data | head | tail | | |
649 | */ | |
650 | bcn->head = ((u8 *) bcn) + sizeof(*bcn); | |
651 | ||
652 | /* fill in the head */ | |
653 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); | |
654 | memset(mgmt, 0, hdr_len); | |
655 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
656 | IEEE80211_STYPE_BEACON); | |
657 | eth_broadcast_addr(mgmt->da); | |
658 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
659 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
660 | ieee80211_mps_set_frame_flags(sdata, NULL, (void *) mgmt); | |
661 | mgmt->u.beacon.beacon_int = | |
662 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); | |
663 | mgmt->u.beacon.capab_info |= cpu_to_le16( | |
664 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
665 | ||
666 | pos = skb_put(skb, 2); | |
667 | *pos++ = WLAN_EID_SSID; | |
668 | *pos++ = 0x0; | |
669 | ||
670 | if (ieee80211_add_srates_ie(sdata, skb, true, band) || | |
bf7cd94d | 671 | mesh_add_ds_params_ie(sdata, skb)) |
2b5e1967 TP |
672 | goto out_free; |
673 | ||
674 | bcn->head_len = skb->len; | |
675 | memcpy(bcn->head, skb->data, bcn->head_len); | |
676 | ||
677 | /* now the tail */ | |
678 | skb_trim(skb, 0); | |
679 | bcn->tail = bcn->head + bcn->head_len; | |
680 | ||
681 | if (ieee80211_add_ext_srates_ie(sdata, skb, true, band) || | |
bf7cd94d JB |
682 | mesh_add_rsn_ie(sdata, skb) || |
683 | mesh_add_ht_cap_ie(sdata, skb) || | |
684 | mesh_add_ht_oper_ie(sdata, skb) || | |
685 | mesh_add_meshid_ie(sdata, skb) || | |
686 | mesh_add_meshconf_ie(sdata, skb) || | |
687 | mesh_add_awake_window_ie(sdata, skb) || | |
688 | mesh_add_vendor_ies(sdata, skb)) | |
2b5e1967 TP |
689 | goto out_free; |
690 | ||
691 | bcn->tail_len = skb->len; | |
692 | memcpy(bcn->tail, skb->data, bcn->tail_len); | |
693 | ||
694 | dev_kfree_skb(skb); | |
695 | rcu_assign_pointer(ifmsh->beacon, bcn); | |
696 | return 0; | |
697 | out_free: | |
698 | kfree(bcn); | |
699 | dev_kfree_skb(skb); | |
700 | return -ENOMEM; | |
701 | } | |
702 | ||
703 | static int | |
704 | ieee80211_mesh_rebuild_beacon(struct ieee80211_if_mesh *ifmsh) | |
705 | { | |
2b5e1967 TP |
706 | struct beacon_data *old_bcn; |
707 | int ret; | |
2b5e1967 TP |
708 | |
709 | mutex_lock(&ifmsh->mtx); | |
710 | ||
711 | old_bcn = rcu_dereference_protected(ifmsh->beacon, | |
712 | lockdep_is_held(&ifmsh->mtx)); | |
713 | ret = ieee80211_mesh_build_beacon(ifmsh); | |
714 | if (ret) | |
715 | /* just reuse old beacon */ | |
716 | goto out; | |
717 | ||
718 | if (old_bcn) | |
719 | kfree_rcu(old_bcn, rcu_head); | |
720 | out: | |
721 | mutex_unlock(&ifmsh->mtx); | |
722 | return ret; | |
723 | } | |
724 | ||
725 | void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata, | |
726 | u32 changed) | |
727 | { | |
728 | if (sdata->vif.bss_conf.enable_beacon && | |
729 | (changed & (BSS_CHANGED_BEACON | | |
730 | BSS_CHANGED_HT | | |
731 | BSS_CHANGED_BASIC_RATES | | |
732 | BSS_CHANGED_BEACON_INT))) | |
733 | if (ieee80211_mesh_rebuild_beacon(&sdata->u.mesh)) | |
734 | return; | |
735 | ieee80211_bss_info_change_notify(sdata, changed); | |
736 | } | |
737 | ||
738 | int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
472dbc45 JB |
739 | { |
740 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
741 | struct ieee80211_local *local = sdata->local; | |
f4eabc91 CYY |
742 | u32 changed = BSS_CHANGED_BEACON | |
743 | BSS_CHANGED_BEACON_ENABLED | | |
744 | BSS_CHANGED_HT | | |
745 | BSS_CHANGED_BASIC_RATES | | |
746 | BSS_CHANGED_BEACON_INT; | |
747 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
472dbc45 | 748 | |
09b17470 JB |
749 | local->fif_other_bss++; |
750 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
751 | atomic_inc(&local->iff_allmultis); | |
752 | ieee80211_configure_filter(local); | |
753 | ||
c7108a71 | 754 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
c7108a71 | 755 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
dbf498fb JC |
756 | /* register sync ops from extensible synchronization framework */ |
757 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
758 | ifmsh->adjusting_tbtt = false; | |
759 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 760 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 761 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 762 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
763 | sdata->vif.bss_conf.ht_operation_mode = |
764 | ifmsh->mshcfg.ht_opmode; | |
d6a83228 | 765 | sdata->vif.bss_conf.enable_beacon = true; |
d934f7d0 | 766 | sdata->vif.bss_conf.basic_rates = |
f4eabc91 CYY |
767 | ieee80211_mandatory_rates(local, band); |
768 | ||
39886b61 | 769 | changed |= ieee80211_mps_local_status_update(sdata); |
3f52b7e3 | 770 | |
2b5e1967 TP |
771 | if (ieee80211_mesh_build_beacon(ifmsh)) { |
772 | ieee80211_stop_mesh(sdata); | |
773 | return -ENOMEM; | |
774 | } | |
775 | ||
f4eabc91 | 776 | ieee80211_bss_info_change_notify(sdata, changed); |
c405c629 JB |
777 | |
778 | netif_carrier_on(sdata->dev); | |
2b5e1967 | 779 | return 0; |
472dbc45 JB |
780 | } |
781 | ||
782 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
783 | { | |
09b17470 | 784 | struct ieee80211_local *local = sdata->local; |
29cbe68c | 785 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 786 | struct beacon_data *bcn; |
29cbe68c | 787 | |
c405c629 JB |
788 | netif_carrier_off(sdata->dev); |
789 | ||
0d466b9c | 790 | /* stop the beacon */ |
29cbe68c | 791 | ifmsh->mesh_id_len = 0; |
d6a83228 JB |
792 | sdata->vif.bss_conf.enable_beacon = false; |
793 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); | |
29cbe68c | 794 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); |
2b5e1967 TP |
795 | mutex_lock(&ifmsh->mtx); |
796 | bcn = rcu_dereference_protected(ifmsh->beacon, | |
797 | lockdep_is_held(&ifmsh->mtx)); | |
798 | rcu_assign_pointer(ifmsh->beacon, NULL); | |
799 | kfree_rcu(bcn, rcu_head); | |
800 | mutex_unlock(&ifmsh->mtx); | |
0d466b9c TP |
801 | |
802 | /* flush STAs and mpaths on this iface */ | |
b998e8bb | 803 | sta_info_flush(sdata); |
0d466b9c | 804 | mesh_path_flush_by_iface(sdata); |
09b17470 | 805 | |
3f52b7e3 MP |
806 | /* free all potentially still buffered group-addressed frames */ |
807 | local->total_ps_buffered -= skb_queue_len(&ifmsh->ps.bc_buf); | |
808 | skb_queue_purge(&ifmsh->ps.bc_buf); | |
809 | ||
472dbc45 | 810 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 811 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 812 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
b7413430 JB |
813 | /* |
814 | * If the timer fired while we waited for it, it will have | |
815 | * requeued the work. Now the work will be running again | |
816 | * but will not rearm the timer again because it checks | |
817 | * whether the interface is running, which, at this point, | |
818 | * it no longer is. | |
819 | */ | |
64592c8f | 820 | cancel_work_sync(&sdata->work); |
09b17470 JB |
821 | |
822 | local->fif_other_bss--; | |
823 | atomic_dec(&local->iff_allmultis); | |
824 | ieee80211_configure_filter(local); | |
472dbc45 JB |
825 | } |
826 | ||
9fb04b50 TP |
827 | static void |
828 | ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, | |
829 | struct ieee80211_mgmt *mgmt, size_t len) | |
830 | { | |
831 | struct ieee80211_local *local = sdata->local; | |
832 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
833 | struct sk_buff *presp; | |
834 | struct beacon_data *bcn; | |
835 | struct ieee80211_mgmt *hdr; | |
836 | struct ieee802_11_elems elems; | |
837 | size_t baselen; | |
511044ea | 838 | u8 *pos; |
9fb04b50 | 839 | |
9fb04b50 TP |
840 | pos = mgmt->u.probe_req.variable; |
841 | baselen = (u8 *) pos - (u8 *) mgmt; | |
842 | if (baselen > len) | |
843 | return; | |
844 | ||
b2e506bf | 845 | ieee802_11_parse_elems(pos, len - baselen, false, &elems); |
9fb04b50 TP |
846 | |
847 | /* 802.11-2012 10.1.4.3.2 */ | |
848 | if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && | |
849 | !is_broadcast_ether_addr(mgmt->da)) || | |
850 | elems.ssid_len != 0) | |
851 | return; | |
852 | ||
853 | if (elems.mesh_id_len != 0 && | |
854 | (elems.mesh_id_len != ifmsh->mesh_id_len || | |
855 | memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) | |
856 | return; | |
857 | ||
858 | rcu_read_lock(); | |
859 | bcn = rcu_dereference(ifmsh->beacon); | |
860 | ||
861 | if (!bcn) | |
862 | goto out; | |
863 | ||
864 | presp = dev_alloc_skb(local->tx_headroom + | |
865 | bcn->head_len + bcn->tail_len); | |
866 | if (!presp) | |
867 | goto out; | |
868 | ||
869 | skb_reserve(presp, local->tx_headroom); | |
870 | memcpy(skb_put(presp, bcn->head_len), bcn->head, bcn->head_len); | |
871 | memcpy(skb_put(presp, bcn->tail_len), bcn->tail, bcn->tail_len); | |
872 | hdr = (struct ieee80211_mgmt *) presp->data; | |
873 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
874 | IEEE80211_STYPE_PROBE_RESP); | |
875 | memcpy(hdr->da, mgmt->sa, ETH_ALEN); | |
9fb04b50 TP |
876 | IEEE80211_SKB_CB(presp)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
877 | ieee80211_tx_skb(sdata, presp); | |
878 | out: | |
879 | rcu_read_unlock(); | |
880 | } | |
881 | ||
472dbc45 JB |
882 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
883 | u16 stype, | |
884 | struct ieee80211_mgmt *mgmt, | |
885 | size_t len, | |
886 | struct ieee80211_rx_status *rx_status) | |
887 | { | |
c6a1fa12 | 888 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 889 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
890 | struct ieee802_11_elems elems; |
891 | struct ieee80211_channel *channel; | |
472dbc45 JB |
892 | size_t baselen; |
893 | int freq; | |
894 | enum ieee80211_band band = rx_status->band; | |
895 | ||
896 | /* ignore ProbeResp to foreign address */ | |
897 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 898 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
899 | return; |
900 | ||
901 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
902 | if (baselen > len) | |
903 | return; | |
904 | ||
905 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
b2e506bf | 906 | false, &elems); |
472dbc45 | 907 | |
9a90bc81 TP |
908 | /* ignore non-mesh or secure / unsecure mismatch */ |
909 | if ((!elems.mesh_id || !elems.mesh_config) || | |
910 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
911 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
912 | return; |
913 | ||
1cd8e88e | 914 | if (elems.ds_params) |
59eb21a6 | 915 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
916 | else |
917 | freq = rx_status->freq; | |
918 | ||
919 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
920 | ||
921 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
922 | return; | |
923 | ||
9a90bc81 | 924 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 925 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
926 | |
927 | if (ifmsh->sync_ops) | |
928 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
929 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
930 | } |
931 | ||
932 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
933 | struct ieee80211_mgmt *mgmt, | |
934 | size_t len, | |
935 | struct ieee80211_rx_status *rx_status) | |
936 | { | |
937 | switch (mgmt->u.action.category) { | |
8db09850 TP |
938 | case WLAN_CATEGORY_SELF_PROTECTED: |
939 | switch (mgmt->u.action.u.self_prot.action_code) { | |
940 | case WLAN_SP_MESH_PEERING_OPEN: | |
941 | case WLAN_SP_MESH_PEERING_CLOSE: | |
942 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
943 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
944 | break; | |
945 | } | |
472dbc45 | 946 | break; |
25d49e4d TP |
947 | case WLAN_CATEGORY_MESH_ACTION: |
948 | if (mesh_action_is_path_sel(mgmt)) | |
949 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
950 | break; |
951 | } | |
952 | } | |
953 | ||
1fa57d01 JB |
954 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
955 | struct sk_buff *skb) | |
472dbc45 JB |
956 | { |
957 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
958 | struct ieee80211_mgmt *mgmt; |
959 | u16 stype; | |
960 | ||
f1d58c25 | 961 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
962 | mgmt = (struct ieee80211_mgmt *) skb->data; |
963 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
964 | ||
965 | switch (stype) { | |
966 | case IEEE80211_STYPE_PROBE_RESP: | |
967 | case IEEE80211_STYPE_BEACON: | |
968 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
969 | rx_status); | |
970 | break; | |
9fb04b50 TP |
971 | case IEEE80211_STYPE_PROBE_REQ: |
972 | ieee80211_mesh_rx_probe_req(sdata, mgmt, skb->len); | |
973 | break; | |
472dbc45 JB |
974 | case IEEE80211_STYPE_ACTION: |
975 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
976 | break; | |
977 | } | |
472dbc45 JB |
978 | } |
979 | ||
1fa57d01 | 980 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 981 | { |
472dbc45 | 982 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
983 | |
984 | if (ifmsh->preq_queue_len && | |
985 | time_after(jiffies, | |
986 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
987 | mesh_path_start_discovery(sdata); | |
988 | ||
18889231 JC |
989 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
990 | mesh_mpath_table_grow(); | |
991 | ||
dcac908b | 992 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
993 | mesh_mpp_table_grow(); |
994 | ||
995 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
bf7cd94d | 996 | ieee80211_mesh_housekeeping(sdata); |
e304bfd3 RP |
997 | |
998 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
999 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
1000 | |
1001 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
1002 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
1003 | } |
1004 | ||
1005 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
1006 | { | |
1007 | struct ieee80211_sub_if_data *sdata; | |
1008 | ||
1009 | rcu_read_lock(); | |
1010 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
370bd005 BG |
1011 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1012 | ieee80211_sdata_running(sdata)) | |
64592c8f | 1013 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
1014 | rcu_read_unlock(); |
1015 | } | |
1016 | ||
902acc78 JB |
1017 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
1018 | { | |
472dbc45 | 1019 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
ad2d223a | 1020 | static u8 zero_addr[ETH_ALEN] = {}; |
472dbc45 | 1021 | |
472dbc45 JB |
1022 | setup_timer(&ifmsh->housekeeping_timer, |
1023 | ieee80211_mesh_housekeeping_timer, | |
1024 | (unsigned long) sdata); | |
472dbc45 | 1025 | |
472dbc45 JB |
1026 | ifmsh->accepting_plinks = true; |
1027 | ifmsh->preq_id = 0; | |
d19b3bf6 | 1028 | ifmsh->sn = 0; |
5ee68e5b | 1029 | ifmsh->num_gates = 0; |
472dbc45 | 1030 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 1031 | mesh_rmc_init(sdata); |
472dbc45 | 1032 | ifmsh->last_preq = jiffies; |
dca7e943 | 1033 | ifmsh->next_perr = jiffies; |
902acc78 JB |
1034 | /* Allocate all mesh structures when creating the first mesh interface. */ |
1035 | if (!mesh_allocated) | |
1036 | ieee80211s_init(); | |
472dbc45 | 1037 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
1038 | ieee80211_mesh_path_timer, |
1039 | (unsigned long) sdata); | |
e304bfd3 RP |
1040 | setup_timer(&ifmsh->mesh_path_root_timer, |
1041 | ieee80211_mesh_path_root_timer, | |
1042 | (unsigned long) sdata); | |
472dbc45 | 1043 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
3f52b7e3 | 1044 | skb_queue_head_init(&ifmsh->ps.bc_buf); |
472dbc45 | 1045 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
dbf498fb | 1046 | spin_lock_init(&ifmsh->sync_offset_lock); |
2b5e1967 TP |
1047 | RCU_INIT_POINTER(ifmsh->beacon, NULL); |
1048 | mutex_init(&ifmsh->mtx); | |
ad2d223a JB |
1049 | |
1050 | sdata->vif.bss_conf.bssid = zero_addr; | |
472dbc45 | 1051 | } |