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 | ||
5bb644a0 JB |
16 | #define TMR_RUNNING_HK 0 |
17 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 18 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 19 | |
2e3c8736 LCC |
20 | int mesh_allocated; |
21 | static struct kmem_cache *rm_cache; | |
22 | ||
25d49e4d TP |
23 | #ifdef CONFIG_MAC80211_MESH |
24 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
25 | { | |
26 | return (mgmt->u.action.u.mesh_action.action_code == | |
27 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
28 | } | |
29 | #else | |
30 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
31 | { return false; } | |
32 | #endif | |
33 | ||
2e3c8736 LCC |
34 | void ieee80211s_init(void) |
35 | { | |
36 | mesh_pathtbl_init(); | |
37 | mesh_allocated = 1; | |
38 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
39 | 0, 0, NULL); | |
40 | } | |
41 | ||
42 | void ieee80211s_stop(void) | |
43 | { | |
44 | mesh_pathtbl_unregister(); | |
45 | kmem_cache_destroy(rm_cache); | |
46 | } | |
47 | ||
472dbc45 JB |
48 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
49 | { | |
50 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
51 | struct ieee80211_local *local = sdata->local; | |
52 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
53 | ||
6b9ac442 | 54 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
55 | |
56 | if (local->quiescing) { | |
57 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
58 | return; | |
59 | } | |
60 | ||
64592c8f | 61 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
62 | } |
63 | ||
2e3c8736 LCC |
64 | /** |
65 | * mesh_matches_local - check if the config of a mesh point matches ours | |
66 | * | |
f698d856 | 67 | * @sdata: local mesh subif |
f743ff49 | 68 | * @ie: information elements of a management frame from the mesh peer |
2e3c8736 LCC |
69 | * |
70 | * This function checks if the mesh configuration of a mesh point matches the | |
71 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
72 | */ | |
f743ff49 TP |
73 | bool mesh_matches_local(struct ieee80211_sub_if_data *sdata, |
74 | struct ieee802_11_elems *ie) | |
2e3c8736 | 75 | { |
472dbc45 | 76 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
739522ba | 77 | struct ieee80211_local *local = sdata->local; |
f743ff49 | 78 | u32 basic_rates = 0; |
4bf88530 | 79 | struct cfg80211_chan_def sta_chan_def; |
2e3c8736 | 80 | |
2e3c8736 LCC |
81 | /* |
82 | * As support for each feature is added, check for matching | |
83 | * - On mesh config capabilities | |
84 | * - Power Save Support En | |
85 | * - Sync support enabled | |
86 | * - Sync support active | |
87 | * - Sync support required from peer | |
88 | * - MDA enabled | |
89 | * - Power management control on fc | |
90 | */ | |
739522ba TP |
91 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
92 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
93 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
94 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
95 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
96 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
97 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
98 | goto mismatch; | |
99 | ||
55de908a | 100 | ieee80211_sta_get_rates(local, ie, ieee80211_get_sdata_band(sdata), |
f743ff49 TP |
101 | &basic_rates); |
102 | ||
fe40cb62 AN |
103 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
104 | goto mismatch; | |
105 | ||
4bf88530 JB |
106 | ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan, |
107 | ie->ht_operation, &sta_chan_def); | |
108 | ||
109 | if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef, | |
110 | &sta_chan_def)) | |
739522ba | 111 | goto mismatch; |
2e3c8736 | 112 | |
739522ba TP |
113 | return true; |
114 | mismatch: | |
2e3c8736 LCC |
115 | return false; |
116 | } | |
117 | ||
118 | /** | |
119 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
120 | * | |
121 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 122 | */ |
f698d856 | 123 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 124 | { |
136cfa28 | 125 | return (ie->mesh_config->meshconf_cap & |
65821635 | 126 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
127 | } |
128 | ||
129 | /** | |
2c53040f | 130 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 131 | * |
d0709a65 | 132 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
133 | * |
134 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 135 | */ |
df323818 | 136 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 137 | { |
2e3c8736 | 138 | bool free_plinks; |
df323818 | 139 | u32 changed = 0; |
2e3c8736 LCC |
140 | |
141 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
142 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
143 | * are already on the table but are not on PLINK_ESTAB state. However, |
144 | * in general the mesh interface is not accepting peer link requests | |
145 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
146 | */ |
147 | free_plinks = mesh_plink_availables(sdata); | |
148 | ||
df323818 MP |
149 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
150 | sdata->u.mesh.accepting_plinks = free_plinks; | |
151 | changed = BSS_CHANGED_BEACON; | |
152 | } | |
153 | ||
154 | return changed; | |
2e3c8736 LCC |
155 | } |
156 | ||
f698d856 | 157 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 158 | { |
2e3c8736 LCC |
159 | int i; |
160 | ||
472dbc45 JB |
161 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
162 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 163 | return -ENOMEM; |
472dbc45 | 164 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 165 | for (i = 0; i < RMC_BUCKETS; i++) |
b7cfcd11 | 166 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i]); |
2e3c8736 LCC |
167 | return 0; |
168 | } | |
169 | ||
f698d856 | 170 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 171 | { |
472dbc45 | 172 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
173 | struct rmc_entry *p, *n; |
174 | int i; | |
175 | ||
472dbc45 | 176 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
177 | return; |
178 | ||
179 | for (i = 0; i < RMC_BUCKETS; i++) | |
b7cfcd11 | 180 | list_for_each_entry_safe(p, n, &rmc->bucket[i], list) { |
2e3c8736 LCC |
181 | list_del(&p->list); |
182 | kmem_cache_free(rm_cache, p); | |
183 | } | |
184 | ||
185 | kfree(rmc); | |
472dbc45 | 186 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
187 | } |
188 | ||
189 | /** | |
190 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
191 | * | |
192 | * @sa: source address | |
193 | * @mesh_hdr: mesh_header | |
194 | * | |
195 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
196 | * | |
197 | * Checks using the source address and the mesh sequence number if we have | |
198 | * received this frame lately. If the frame is not in the cache, it is added to | |
199 | * it. | |
200 | */ | |
201 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 202 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 203 | { |
472dbc45 | 204 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
205 | u32 seqnum = 0; |
206 | int entries = 0; | |
207 | u8 idx; | |
208 | struct rmc_entry *p, *n; | |
209 | ||
210 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
211 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
212 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
b7cfcd11 | 213 | list_for_each_entry_safe(p, n, &rmc->bucket[idx], list) { |
2e3c8736 LCC |
214 | ++entries; |
215 | if (time_after(jiffies, p->exp_time) || | |
216 | (entries == RMC_QUEUE_MAX_LEN)) { | |
217 | list_del(&p->list); | |
218 | kmem_cache_free(rm_cache, p); | |
219 | --entries; | |
f64f9e71 | 220 | } else if ((seqnum == p->seqnum) && |
b203ca39 | 221 | (ether_addr_equal(sa, p->sa))) |
2e3c8736 LCC |
222 | return -1; |
223 | } | |
224 | ||
225 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 226 | if (!p) |
2e3c8736 | 227 | return 0; |
d15b8459 | 228 | |
2e3c8736 LCC |
229 | p->seqnum = seqnum; |
230 | p->exp_time = jiffies + RMC_TIMEOUT; | |
231 | memcpy(p->sa, sa, ETH_ALEN); | |
b7cfcd11 | 232 | list_add(&p->list, &rmc->bucket[idx]); |
2e3c8736 LCC |
233 | return 0; |
234 | } | |
235 | ||
082ebb0c TP |
236 | int |
237 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
238 | { | |
239 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
240 | u8 *pos, neighbors; | |
241 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
242 | ||
243 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
244 | return -ENOMEM; | |
245 | ||
246 | pos = skb_put(skb, 2 + meshconf_len); | |
247 | *pos++ = WLAN_EID_MESH_CONFIG; | |
248 | *pos++ = meshconf_len; | |
249 | ||
250 | /* Active path selection protocol ID */ | |
251 | *pos++ = ifmsh->mesh_pp_id; | |
252 | /* Active path selection metric ID */ | |
253 | *pos++ = ifmsh->mesh_pm_id; | |
254 | /* Congestion control mode identifier */ | |
255 | *pos++ = ifmsh->mesh_cc_id; | |
256 | /* Synchronization protocol identifier */ | |
257 | *pos++ = ifmsh->mesh_sp_id; | |
258 | /* Authentication Protocol identifier */ | |
259 | *pos++ = ifmsh->mesh_auth_id; | |
260 | /* Mesh Formation Info - number of neighbors */ | |
1258d976 | 261 | neighbors = atomic_read(&ifmsh->estab_plinks); |
082ebb0c TP |
262 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
263 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
264 | *pos++ = neighbors << 1; | |
265 | /* Mesh capability */ | |
65821635 | 266 | *pos = IEEE80211_MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 267 | *pos |= ifmsh->accepting_plinks ? |
65821635 | 268 | IEEE80211_MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
dbf498fb | 269 | *pos++ |= ifmsh->adjusting_tbtt ? |
65821635 | 270 | IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; |
082ebb0c TP |
271 | *pos++ = 0x00; |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | int | |
277 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
278 | { | |
279 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
280 | u8 *pos; | |
281 | ||
282 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
283 | return -ENOMEM; | |
284 | ||
285 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
286 | *pos++ = WLAN_EID_MESH_ID; | |
287 | *pos++ = ifmsh->mesh_id_len; | |
288 | if (ifmsh->mesh_id_len) | |
289 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | int | |
295 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
296 | { | |
297 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
298 | u8 offset, len; | |
299 | const u8 *data; | |
300 | ||
301 | if (!ifmsh->ie || !ifmsh->ie_len) | |
302 | return 0; | |
303 | ||
304 | /* fast-forward to vendor IEs */ | |
305 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
306 | ||
307 | if (offset) { | |
308 | len = ifmsh->ie_len - offset; | |
309 | data = ifmsh->ie + offset; | |
310 | if (skb_tailroom(skb) < len) | |
311 | return -ENOMEM; | |
312 | memcpy(skb_put(skb, len), data, len); | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | int | |
319 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
320 | { | |
321 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
322 | u8 len = 0; | |
323 | const u8 *data; | |
324 | ||
325 | if (!ifmsh->ie || !ifmsh->ie_len) | |
326 | return 0; | |
327 | ||
328 | /* find RSN IE */ | |
329 | data = ifmsh->ie; | |
330 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
331 | if (*data == WLAN_EID_RSN) { | |
332 | len = data[1] + 2; | |
333 | break; | |
334 | } | |
335 | data++; | |
336 | } | |
337 | ||
338 | if (len) { | |
339 | if (skb_tailroom(skb) < len) | |
340 | return -ENOMEM; | |
341 | memcpy(skb_put(skb, len), data, len); | |
342 | } | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
082ebb0c TP |
347 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
348 | struct ieee80211_sub_if_data *sdata) | |
349 | { | |
350 | struct ieee80211_local *local = sdata->local; | |
351 | struct ieee80211_supported_band *sband; | |
55de908a JB |
352 | struct ieee80211_chanctx_conf *chanctx_conf; |
353 | struct ieee80211_channel *chan; | |
082ebb0c | 354 | u8 *pos; |
2e3c8736 | 355 | |
082ebb0c TP |
356 | if (skb_tailroom(skb) < 3) |
357 | return -ENOMEM; | |
358 | ||
55de908a JB |
359 | rcu_read_lock(); |
360 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
361 | if (WARN_ON(!chanctx_conf)) { | |
362 | rcu_read_unlock(); | |
363 | return -EINVAL; | |
364 | } | |
4bf88530 | 365 | chan = chanctx_conf->def.chan; |
55de908a JB |
366 | rcu_read_unlock(); |
367 | ||
6962d602 | 368 | sband = local->hw.wiphy->bands[chan->band]; |
be125c60 RP |
369 | if (sband->band == IEEE80211_BAND_2GHZ) { |
370 | pos = skb_put(skb, 2 + 1); | |
371 | *pos++ = WLAN_EID_DS_PARAMS; | |
372 | *pos++ = 1; | |
6962d602 | 373 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
be125c60 RP |
374 | } |
375 | ||
082ebb0c | 376 | return 0; |
2e3c8736 LCC |
377 | } |
378 | ||
176f3608 TP |
379 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
380 | struct ieee80211_sub_if_data *sdata) | |
381 | { | |
382 | struct ieee80211_local *local = sdata->local; | |
55de908a | 383 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
176f3608 TP |
384 | struct ieee80211_supported_band *sband; |
385 | u8 *pos; | |
386 | ||
55de908a | 387 | sband = local->hw.wiphy->bands[band]; |
176f3608 | 388 | if (!sband->ht_cap.ht_supported || |
4bf88530 | 389 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) |
176f3608 TP |
390 | return 0; |
391 | ||
392 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
393 | return -ENOMEM; | |
394 | ||
395 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 396 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
397 | |
398 | return 0; | |
399 | } | |
400 | ||
074d46d1 | 401 | int mesh_add_ht_oper_ie(struct sk_buff *skb, |
176f3608 TP |
402 | struct ieee80211_sub_if_data *sdata) |
403 | { | |
404 | struct ieee80211_local *local = sdata->local; | |
55de908a JB |
405 | struct ieee80211_chanctx_conf *chanctx_conf; |
406 | struct ieee80211_channel *channel; | |
466f310d | 407 | enum nl80211_channel_type channel_type = |
4bf88530 | 408 | cfg80211_get_chandef_type(&sdata->vif.bss_conf.chandef); |
55de908a JB |
409 | struct ieee80211_supported_band *sband; |
410 | struct ieee80211_sta_ht_cap *ht_cap; | |
176f3608 TP |
411 | u8 *pos; |
412 | ||
55de908a JB |
413 | rcu_read_lock(); |
414 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
415 | if (WARN_ON(!chanctx_conf)) { | |
416 | rcu_read_unlock(); | |
417 | return -EINVAL; | |
418 | } | |
4bf88530 | 419 | channel = chanctx_conf->def.chan; |
55de908a JB |
420 | rcu_read_unlock(); |
421 | ||
422 | sband = local->hw.wiphy->bands[channel->band]; | |
423 | ht_cap = &sband->ht_cap; | |
424 | ||
176f3608 TP |
425 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) |
426 | return 0; | |
427 | ||
074d46d1 | 428 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
429 | return -ENOMEM; |
430 | ||
074d46d1 | 431 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
4bf88530 | 432 | ieee80211_ie_build_ht_oper(pos, ht_cap, &sdata->vif.bss_conf.chandef, |
431e3154 | 433 | sdata->vif.bss_conf.ht_operation_mode); |
176f3608 TP |
434 | |
435 | return 0; | |
436 | } | |
2e3c8736 LCC |
437 | static void ieee80211_mesh_path_timer(unsigned long data) |
438 | { | |
439 | struct ieee80211_sub_if_data *sdata = | |
440 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 441 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 442 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 443 | |
5bb644a0 JB |
444 | if (local->quiescing) { |
445 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
446 | return; | |
447 | } | |
448 | ||
64592c8f | 449 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
450 | } |
451 | ||
e304bfd3 RP |
452 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
453 | { | |
454 | struct ieee80211_sub_if_data *sdata = | |
455 | (struct ieee80211_sub_if_data *) data; | |
456 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
457 | struct ieee80211_local *local = sdata->local; | |
458 | ||
459 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
460 | ||
461 | if (local->quiescing) { | |
462 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
463 | return; | |
464 | } | |
465 | ||
64592c8f | 466 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
467 | } |
468 | ||
63c5723b RP |
469 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
470 | { | |
dbb912cd | 471 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
472 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
473 | else { | |
474 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
475 | /* stop running timer */ | |
476 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
477 | } | |
478 | } | |
479 | ||
3c5772a5 JC |
480 | /** |
481 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
482 | * @hdr: 802.11 frame header | |
483 | * @fc: frame control field | |
484 | * @meshda: destination address in the mesh | |
485 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
486 | * locally originated. | |
487 | * | |
488 | * Return the length of the 802.11 (does not include a mesh control header) | |
489 | */ | |
15ff6365 JB |
490 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
491 | const u8 *meshda, const u8 *meshsa) | |
492 | { | |
3c5772a5 JC |
493 | if (is_multicast_ether_addr(meshda)) { |
494 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
495 | /* DA TA SA */ | |
496 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
497 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
498 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
499 | return 24; | |
500 | } else { | |
2154c81c | 501 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
502 | /* RA TA DA SA */ |
503 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
504 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
505 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
506 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
507 | return 30; | |
508 | } | |
509 | } | |
510 | ||
902acc78 JB |
511 | /** |
512 | * ieee80211_new_mesh_header - create a new mesh header | |
513 | * @meshhdr: uninitialized mesh header | |
514 | * @sdata: mesh interface to be used | |
61ad5394 JC |
515 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
516 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
517 | * be NULL. | |
518 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
519 | * mesh frame | |
902acc78 JB |
520 | * |
521 | * Return the header length. | |
522 | */ | |
523 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
524 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
525 | char *addr6) | |
902acc78 | 526 | { |
3c5772a5 | 527 | int aelen = 0; |
61ad5394 | 528 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 529 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
530 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
531 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
532 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 533 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
534 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
535 | aelen += ETH_ALEN; | |
61ad5394 JC |
536 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
537 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
538 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
539 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
540 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
541 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
542 | } |
543 | return 6 + aelen; | |
902acc78 JB |
544 | } |
545 | ||
472dbc45 JB |
546 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
547 | struct ieee80211_if_mesh *ifmsh) | |
548 | { | |
df323818 | 549 | u32 changed; |
472dbc45 | 550 | |
472dbc45 JB |
551 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
552 | mesh_path_expire(sdata); | |
553 | ||
df323818 MP |
554 | changed = mesh_accept_plinks_update(sdata); |
555 | ieee80211_bss_info_change_notify(sdata, changed); | |
472dbc45 | 556 | |
472dbc45 JB |
557 | mod_timer(&ifmsh->housekeeping_timer, |
558 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
559 | } | |
560 | ||
e304bfd3 RP |
561 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
562 | { | |
563 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 564 | u32 interval; |
e304bfd3 RP |
565 | |
566 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
567 | |
568 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
569 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
570 | else | |
571 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
572 | ||
e304bfd3 | 573 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 574 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
575 | } |
576 | ||
5bb644a0 JB |
577 | #ifdef CONFIG_PM |
578 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
579 | { | |
580 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
581 | ||
5ee68e5b | 582 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
583 | |
584 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
585 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
586 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
587 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
588 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
589 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
590 | } |
591 | ||
592 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
593 | { | |
594 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
595 | ||
596 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
597 | add_timer(&ifmsh->housekeeping_timer); | |
598 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
599 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
600 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
601 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 602 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
603 | } |
604 | #endif | |
472dbc45 JB |
605 | |
606 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
607 | { | |
608 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
609 | struct ieee80211_local *local = sdata->local; | |
610 | ||
09b17470 JB |
611 | local->fif_other_bss++; |
612 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
613 | atomic_inc(&local->iff_allmultis); | |
614 | ieee80211_configure_filter(local); | |
615 | ||
c7108a71 | 616 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
c7108a71 | 617 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
dbf498fb JC |
618 | /* register sync ops from extensible synchronization framework */ |
619 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
620 | ifmsh->adjusting_tbtt = false; | |
621 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 622 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 623 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 624 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
625 | sdata->vif.bss_conf.ht_operation_mode = |
626 | ifmsh->mshcfg.ht_opmode; | |
5b365834 | 627 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
d934f7d0 AN |
628 | sdata->vif.bss_conf.basic_rates = |
629 | ieee80211_mandatory_rates(sdata->local, | |
55de908a | 630 | ieee80211_get_sdata_band(sdata)); |
2d0ddec5 | 631 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 | 632 | BSS_CHANGED_BEACON_ENABLED | |
70c33eaa | 633 | BSS_CHANGED_HT | |
d934f7d0 | 634 | BSS_CHANGED_BASIC_RATES | |
5b365834 | 635 | BSS_CHANGED_BEACON_INT); |
c405c629 JB |
636 | |
637 | netif_carrier_on(sdata->dev); | |
472dbc45 JB |
638 | } |
639 | ||
640 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
641 | { | |
09b17470 | 642 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
643 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
644 | ||
c405c629 JB |
645 | netif_carrier_off(sdata->dev); |
646 | ||
0d466b9c | 647 | /* stop the beacon */ |
29cbe68c JB |
648 | ifmsh->mesh_id_len = 0; |
649 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
0d466b9c TP |
650 | |
651 | /* flush STAs and mpaths on this iface */ | |
652 | sta_info_flush(sdata->local, sdata); | |
653 | mesh_path_flush_by_iface(sdata); | |
09b17470 | 654 | |
472dbc45 | 655 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 656 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 657 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
b7413430 JB |
658 | /* |
659 | * If the timer fired while we waited for it, it will have | |
660 | * requeued the work. Now the work will be running again | |
661 | * but will not rearm the timer again because it checks | |
662 | * whether the interface is running, which, at this point, | |
663 | * it no longer is. | |
664 | */ | |
64592c8f | 665 | cancel_work_sync(&sdata->work); |
09b17470 JB |
666 | |
667 | local->fif_other_bss--; | |
668 | atomic_dec(&local->iff_allmultis); | |
669 | ieee80211_configure_filter(local); | |
2d9957cc JB |
670 | |
671 | sdata->u.mesh.timers_running = 0; | |
472dbc45 JB |
672 | } |
673 | ||
674 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
675 | u16 stype, | |
676 | struct ieee80211_mgmt *mgmt, | |
677 | size_t len, | |
678 | struct ieee80211_rx_status *rx_status) | |
679 | { | |
c6a1fa12 | 680 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 681 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
682 | struct ieee802_11_elems elems; |
683 | struct ieee80211_channel *channel; | |
472dbc45 JB |
684 | size_t baselen; |
685 | int freq; | |
686 | enum ieee80211_band band = rx_status->band; | |
687 | ||
688 | /* ignore ProbeResp to foreign address */ | |
689 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 690 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
691 | return; |
692 | ||
693 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
694 | if (baselen > len) | |
695 | return; | |
696 | ||
697 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
698 | &elems); | |
699 | ||
9a90bc81 TP |
700 | /* ignore non-mesh or secure / unsecure mismatch */ |
701 | if ((!elems.mesh_id || !elems.mesh_config) || | |
702 | (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || | |
703 | (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) | |
5cff5e01 JC |
704 | return; |
705 | ||
472dbc45 | 706 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 707 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
708 | else |
709 | freq = rx_status->freq; | |
710 | ||
711 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
712 | ||
713 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
714 | return; | |
715 | ||
9a90bc81 | 716 | if (mesh_matches_local(sdata, &elems)) |
f743ff49 | 717 | mesh_neighbour_update(sdata, mgmt->sa, &elems); |
dbf498fb JC |
718 | |
719 | if (ifmsh->sync_ops) | |
720 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
721 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
722 | } |
723 | ||
724 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
725 | struct ieee80211_mgmt *mgmt, | |
726 | size_t len, | |
727 | struct ieee80211_rx_status *rx_status) | |
728 | { | |
729 | switch (mgmt->u.action.category) { | |
8db09850 TP |
730 | case WLAN_CATEGORY_SELF_PROTECTED: |
731 | switch (mgmt->u.action.u.self_prot.action_code) { | |
732 | case WLAN_SP_MESH_PEERING_OPEN: | |
733 | case WLAN_SP_MESH_PEERING_CLOSE: | |
734 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
735 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
736 | break; | |
737 | } | |
472dbc45 | 738 | break; |
25d49e4d TP |
739 | case WLAN_CATEGORY_MESH_ACTION: |
740 | if (mesh_action_is_path_sel(mgmt)) | |
741 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
742 | break; |
743 | } | |
744 | } | |
745 | ||
1fa57d01 JB |
746 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
747 | struct sk_buff *skb) | |
472dbc45 JB |
748 | { |
749 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
750 | struct ieee80211_mgmt *mgmt; |
751 | u16 stype; | |
752 | ||
f1d58c25 | 753 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
754 | mgmt = (struct ieee80211_mgmt *) skb->data; |
755 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
756 | ||
757 | switch (stype) { | |
758 | case IEEE80211_STYPE_PROBE_RESP: | |
759 | case IEEE80211_STYPE_BEACON: | |
760 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
761 | rx_status); | |
762 | break; | |
763 | case IEEE80211_STYPE_ACTION: | |
764 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
765 | break; | |
766 | } | |
472dbc45 JB |
767 | } |
768 | ||
1fa57d01 | 769 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 770 | { |
472dbc45 | 771 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
772 | |
773 | if (ifmsh->preq_queue_len && | |
774 | time_after(jiffies, | |
775 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
776 | mesh_path_start_discovery(sdata); | |
777 | ||
18889231 JC |
778 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
779 | mesh_mpath_table_grow(); | |
780 | ||
dcac908b | 781 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
782 | mesh_mpp_table_grow(); |
783 | ||
784 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 785 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
786 | |
787 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
788 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
789 | |
790 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
791 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
792 | } |
793 | ||
794 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
795 | { | |
796 | struct ieee80211_sub_if_data *sdata; | |
797 | ||
798 | rcu_read_lock(); | |
799 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
800 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 801 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
802 | rcu_read_unlock(); |
803 | } | |
804 | ||
902acc78 JB |
805 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
806 | { | |
472dbc45 JB |
807 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
808 | ||
472dbc45 JB |
809 | setup_timer(&ifmsh->housekeeping_timer, |
810 | ieee80211_mesh_housekeeping_timer, | |
811 | (unsigned long) sdata); | |
472dbc45 | 812 | |
472dbc45 JB |
813 | ifmsh->accepting_plinks = true; |
814 | ifmsh->preq_id = 0; | |
d19b3bf6 | 815 | ifmsh->sn = 0; |
5ee68e5b | 816 | ifmsh->num_gates = 0; |
472dbc45 | 817 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 818 | mesh_rmc_init(sdata); |
472dbc45 | 819 | ifmsh->last_preq = jiffies; |
dca7e943 | 820 | ifmsh->next_perr = jiffies; |
902acc78 JB |
821 | /* Allocate all mesh structures when creating the first mesh interface. */ |
822 | if (!mesh_allocated) | |
823 | ieee80211s_init(); | |
472dbc45 | 824 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
825 | ieee80211_mesh_path_timer, |
826 | (unsigned long) sdata); | |
e304bfd3 RP |
827 | setup_timer(&ifmsh->mesh_path_root_timer, |
828 | ieee80211_mesh_path_root_timer, | |
829 | (unsigned long) sdata); | |
472dbc45 JB |
830 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
831 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
dbf498fb | 832 | spin_lock_init(&ifmsh->sync_offset_lock); |
472dbc45 | 833 | } |