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; |
b91e64aa | 79 | enum nl80211_channel_type sta_channel_type = NL80211_CHAN_NO_HT; |
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 | ||
f743ff49 TP |
100 | ieee80211_sta_get_rates(local, ie, local->oper_channel->band, |
101 | &basic_rates); | |
102 | ||
fe40cb62 AN |
103 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
104 | goto mismatch; | |
105 | ||
b91e64aa AN |
106 | if (ie->ht_operation) |
107 | sta_channel_type = | |
108 | ieee80211_ht_oper_to_channel_type(ie->ht_operation); | |
109 | ||
110 | /* Disallow HT40+/- mismatch */ | |
074d46d1 | 111 | if (ie->ht_operation && |
466f310d JB |
112 | (sdata->vif.bss_conf.channel_type == NL80211_CHAN_HT40MINUS || |
113 | sdata->vif.bss_conf.channel_type == NL80211_CHAN_HT40PLUS) && | |
0e482db8 AN |
114 | (sta_channel_type == NL80211_CHAN_HT40MINUS || |
115 | sta_channel_type == NL80211_CHAN_HT40PLUS) && | |
466f310d | 116 | sdata->vif.bss_conf.channel_type != sta_channel_type) |
739522ba | 117 | goto mismatch; |
2e3c8736 | 118 | |
739522ba TP |
119 | return true; |
120 | mismatch: | |
2e3c8736 LCC |
121 | return false; |
122 | } | |
123 | ||
124 | /** | |
125 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
126 | * | |
127 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 128 | */ |
f698d856 | 129 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 130 | { |
136cfa28 | 131 | return (ie->mesh_config->meshconf_cap & |
3491707a | 132 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
133 | } |
134 | ||
135 | /** | |
2c53040f | 136 | * mesh_accept_plinks_update - update accepting_plink in local mesh beacons |
2e3c8736 | 137 | * |
d0709a65 | 138 | * @sdata: mesh interface in which mesh beacons are going to be updated |
df323818 MP |
139 | * |
140 | * Returns: beacon changed flag if the beacon content changed. | |
2e3c8736 | 141 | */ |
df323818 | 142 | u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 143 | { |
2e3c8736 | 144 | bool free_plinks; |
df323818 | 145 | u32 changed = 0; |
2e3c8736 LCC |
146 | |
147 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
148 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
149 | * are already on the table but are not on PLINK_ESTAB state. However, |
150 | * in general the mesh interface is not accepting peer link requests | |
151 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
152 | */ |
153 | free_plinks = mesh_plink_availables(sdata); | |
154 | ||
df323818 MP |
155 | if (free_plinks != sdata->u.mesh.accepting_plinks) { |
156 | sdata->u.mesh.accepting_plinks = free_plinks; | |
157 | changed = BSS_CHANGED_BEACON; | |
158 | } | |
159 | ||
160 | return changed; | |
2e3c8736 LCC |
161 | } |
162 | ||
f698d856 | 163 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 164 | { |
2e3c8736 LCC |
165 | int i; |
166 | ||
472dbc45 JB |
167 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
168 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 169 | return -ENOMEM; |
472dbc45 | 170 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 171 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 172 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
173 | return 0; |
174 | } | |
175 | ||
f698d856 | 176 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 177 | { |
472dbc45 | 178 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
179 | struct rmc_entry *p, *n; |
180 | int i; | |
181 | ||
472dbc45 | 182 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
183 | return; |
184 | ||
185 | for (i = 0; i < RMC_BUCKETS; i++) | |
186 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
187 | list_del(&p->list); | |
188 | kmem_cache_free(rm_cache, p); | |
189 | } | |
190 | ||
191 | kfree(rmc); | |
472dbc45 | 192 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
193 | } |
194 | ||
195 | /** | |
196 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
197 | * | |
198 | * @sa: source address | |
199 | * @mesh_hdr: mesh_header | |
200 | * | |
201 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
202 | * | |
203 | * Checks using the source address and the mesh sequence number if we have | |
204 | * received this frame lately. If the frame is not in the cache, it is added to | |
205 | * it. | |
206 | */ | |
207 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 208 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 209 | { |
472dbc45 | 210 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
211 | u32 seqnum = 0; |
212 | int entries = 0; | |
213 | u8 idx; | |
214 | struct rmc_entry *p, *n; | |
215 | ||
216 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
217 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
218 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
219 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
220 | ++entries; | |
221 | if (time_after(jiffies, p->exp_time) || | |
222 | (entries == RMC_QUEUE_MAX_LEN)) { | |
223 | list_del(&p->list); | |
224 | kmem_cache_free(rm_cache, p); | |
225 | --entries; | |
f64f9e71 | 226 | } else if ((seqnum == p->seqnum) && |
b203ca39 | 227 | (ether_addr_equal(sa, p->sa))) |
2e3c8736 LCC |
228 | return -1; |
229 | } | |
230 | ||
231 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 232 | if (!p) |
2e3c8736 | 233 | return 0; |
d15b8459 | 234 | |
2e3c8736 LCC |
235 | p->seqnum = seqnum; |
236 | p->exp_time = jiffies + RMC_TIMEOUT; | |
237 | memcpy(p->sa, sa, ETH_ALEN); | |
238 | list_add(&p->list, &rmc->bucket[idx].list); | |
239 | return 0; | |
240 | } | |
241 | ||
082ebb0c TP |
242 | int |
243 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
244 | { | |
245 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
246 | u8 *pos, neighbors; | |
247 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
248 | ||
249 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
250 | return -ENOMEM; | |
251 | ||
252 | pos = skb_put(skb, 2 + meshconf_len); | |
253 | *pos++ = WLAN_EID_MESH_CONFIG; | |
254 | *pos++ = meshconf_len; | |
255 | ||
256 | /* Active path selection protocol ID */ | |
257 | *pos++ = ifmsh->mesh_pp_id; | |
258 | /* Active path selection metric ID */ | |
259 | *pos++ = ifmsh->mesh_pm_id; | |
260 | /* Congestion control mode identifier */ | |
261 | *pos++ = ifmsh->mesh_cc_id; | |
262 | /* Synchronization protocol identifier */ | |
263 | *pos++ = ifmsh->mesh_sp_id; | |
264 | /* Authentication Protocol identifier */ | |
265 | *pos++ = ifmsh->mesh_auth_id; | |
266 | /* Mesh Formation Info - number of neighbors */ | |
267 | neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); | |
268 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
269 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
270 | *pos++ = neighbors << 1; | |
271 | /* Mesh capability */ | |
082ebb0c | 272 | *pos = MESHCONF_CAPAB_FORWARDING; |
dbf498fb | 273 | *pos |= ifmsh->accepting_plinks ? |
082ebb0c | 274 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
dbf498fb JC |
275 | *pos++ |= ifmsh->adjusting_tbtt ? |
276 | MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; | |
082ebb0c TP |
277 | *pos++ = 0x00; |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | int | |
283 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
284 | { | |
285 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
286 | u8 *pos; | |
287 | ||
288 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
289 | return -ENOMEM; | |
290 | ||
291 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
292 | *pos++ = WLAN_EID_MESH_ID; | |
293 | *pos++ = ifmsh->mesh_id_len; | |
294 | if (ifmsh->mesh_id_len) | |
295 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | int | |
301 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
302 | { | |
303 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
304 | u8 offset, len; | |
305 | const u8 *data; | |
306 | ||
307 | if (!ifmsh->ie || !ifmsh->ie_len) | |
308 | return 0; | |
309 | ||
310 | /* fast-forward to vendor IEs */ | |
311 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
312 | ||
313 | if (offset) { | |
314 | len = ifmsh->ie_len - offset; | |
315 | data = ifmsh->ie + offset; | |
316 | if (skb_tailroom(skb) < len) | |
317 | return -ENOMEM; | |
318 | memcpy(skb_put(skb, len), data, len); | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | int | |
325 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
326 | { | |
327 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
328 | u8 len = 0; | |
329 | const u8 *data; | |
330 | ||
331 | if (!ifmsh->ie || !ifmsh->ie_len) | |
332 | return 0; | |
333 | ||
334 | /* find RSN IE */ | |
335 | data = ifmsh->ie; | |
336 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
337 | if (*data == WLAN_EID_RSN) { | |
338 | len = data[1] + 2; | |
339 | break; | |
340 | } | |
341 | data++; | |
342 | } | |
343 | ||
344 | if (len) { | |
345 | if (skb_tailroom(skb) < len) | |
346 | return -ENOMEM; | |
347 | memcpy(skb_put(skb, len), data, len); | |
348 | } | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
082ebb0c TP |
353 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
354 | struct ieee80211_sub_if_data *sdata) | |
355 | { | |
356 | struct ieee80211_local *local = sdata->local; | |
357 | struct ieee80211_supported_band *sband; | |
6962d602 | 358 | struct ieee80211_channel *chan = local->oper_channel; |
082ebb0c | 359 | u8 *pos; |
2e3c8736 | 360 | |
082ebb0c TP |
361 | if (skb_tailroom(skb) < 3) |
362 | return -ENOMEM; | |
363 | ||
6962d602 | 364 | sband = local->hw.wiphy->bands[chan->band]; |
be125c60 RP |
365 | if (sband->band == IEEE80211_BAND_2GHZ) { |
366 | pos = skb_put(skb, 2 + 1); | |
367 | *pos++ = WLAN_EID_DS_PARAMS; | |
368 | *pos++ = 1; | |
6962d602 | 369 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
be125c60 RP |
370 | } |
371 | ||
082ebb0c | 372 | return 0; |
2e3c8736 LCC |
373 | } |
374 | ||
176f3608 TP |
375 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
376 | struct ieee80211_sub_if_data *sdata) | |
377 | { | |
378 | struct ieee80211_local *local = sdata->local; | |
379 | struct ieee80211_supported_band *sband; | |
380 | u8 *pos; | |
381 | ||
382 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
383 | if (!sband->ht_cap.ht_supported || | |
466f310d | 384 | sdata->vif.bss_conf.channel_type == NL80211_CHAN_NO_HT) |
176f3608 TP |
385 | return 0; |
386 | ||
387 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
388 | return -ENOMEM; | |
389 | ||
390 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 391 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
392 | |
393 | return 0; | |
394 | } | |
395 | ||
074d46d1 | 396 | int mesh_add_ht_oper_ie(struct sk_buff *skb, |
176f3608 TP |
397 | struct ieee80211_sub_if_data *sdata) |
398 | { | |
399 | struct ieee80211_local *local = sdata->local; | |
400 | struct ieee80211_channel *channel = local->oper_channel; | |
466f310d JB |
401 | enum nl80211_channel_type channel_type = |
402 | sdata->vif.bss_conf.channel_type; | |
176f3608 TP |
403 | struct ieee80211_supported_band *sband = |
404 | local->hw.wiphy->bands[channel->band]; | |
405 | struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; | |
406 | u8 *pos; | |
407 | ||
408 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) | |
409 | return 0; | |
410 | ||
074d46d1 | 411 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
412 | return -ENOMEM; |
413 | ||
074d46d1 | 414 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
431e3154 AN |
415 | ieee80211_ie_build_ht_oper(pos, ht_cap, channel, channel_type, |
416 | sdata->vif.bss_conf.ht_operation_mode); | |
176f3608 TP |
417 | |
418 | return 0; | |
419 | } | |
2e3c8736 LCC |
420 | static void ieee80211_mesh_path_timer(unsigned long data) |
421 | { | |
422 | struct ieee80211_sub_if_data *sdata = | |
423 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 424 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 425 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 426 | |
5bb644a0 JB |
427 | if (local->quiescing) { |
428 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
429 | return; | |
430 | } | |
431 | ||
64592c8f | 432 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
433 | } |
434 | ||
e304bfd3 RP |
435 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
436 | { | |
437 | struct ieee80211_sub_if_data *sdata = | |
438 | (struct ieee80211_sub_if_data *) data; | |
439 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
440 | struct ieee80211_local *local = sdata->local; | |
441 | ||
442 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
443 | ||
444 | if (local->quiescing) { | |
445 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
446 | return; | |
447 | } | |
448 | ||
64592c8f | 449 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
450 | } |
451 | ||
63c5723b RP |
452 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
453 | { | |
dbb912cd | 454 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode > IEEE80211_ROOTMODE_ROOT) |
63c5723b RP |
455 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
456 | else { | |
457 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
458 | /* stop running timer */ | |
459 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
460 | } | |
461 | } | |
462 | ||
3c5772a5 JC |
463 | /** |
464 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
465 | * @hdr: 802.11 frame header | |
466 | * @fc: frame control field | |
467 | * @meshda: destination address in the mesh | |
468 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
469 | * locally originated. | |
470 | * | |
471 | * Return the length of the 802.11 (does not include a mesh control header) | |
472 | */ | |
15ff6365 JB |
473 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
474 | const u8 *meshda, const u8 *meshsa) | |
475 | { | |
3c5772a5 JC |
476 | if (is_multicast_ether_addr(meshda)) { |
477 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
478 | /* DA TA SA */ | |
479 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
480 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
481 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
482 | return 24; | |
483 | } else { | |
2154c81c | 484 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
485 | /* RA TA DA SA */ |
486 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
487 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
488 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
489 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
490 | return 30; | |
491 | } | |
492 | } | |
493 | ||
902acc78 JB |
494 | /** |
495 | * ieee80211_new_mesh_header - create a new mesh header | |
496 | * @meshhdr: uninitialized mesh header | |
497 | * @sdata: mesh interface to be used | |
61ad5394 JC |
498 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
499 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
500 | * be NULL. | |
501 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
502 | * mesh frame | |
902acc78 JB |
503 | * |
504 | * Return the header length. | |
505 | */ | |
506 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
507 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
508 | char *addr6) | |
902acc78 | 509 | { |
3c5772a5 | 510 | int aelen = 0; |
61ad5394 | 511 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 512 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
513 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
514 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
515 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 516 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
517 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
518 | aelen += ETH_ALEN; | |
61ad5394 JC |
519 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
520 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
521 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
522 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
523 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
524 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
525 | } |
526 | return 6 + aelen; | |
902acc78 JB |
527 | } |
528 | ||
472dbc45 JB |
529 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
530 | struct ieee80211_if_mesh *ifmsh) | |
531 | { | |
df323818 | 532 | u32 changed; |
472dbc45 | 533 | |
472dbc45 JB |
534 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
535 | mesh_path_expire(sdata); | |
536 | ||
df323818 MP |
537 | changed = mesh_accept_plinks_update(sdata); |
538 | ieee80211_bss_info_change_notify(sdata, changed); | |
472dbc45 | 539 | |
472dbc45 JB |
540 | mod_timer(&ifmsh->housekeeping_timer, |
541 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
542 | } | |
543 | ||
e304bfd3 RP |
544 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
545 | { | |
546 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
a69cc44f | 547 | u32 interval; |
e304bfd3 RP |
548 | |
549 | mesh_path_tx_root_frame(sdata); | |
a69cc44f CYY |
550 | |
551 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode == IEEE80211_PROACTIVE_RANN) | |
552 | interval = ifmsh->mshcfg.dot11MeshHWMPRannInterval; | |
553 | else | |
554 | interval = ifmsh->mshcfg.dot11MeshHWMProotInterval; | |
555 | ||
e304bfd3 | 556 | mod_timer(&ifmsh->mesh_path_root_timer, |
a69cc44f | 557 | round_jiffies(TU_TO_EXP_TIME(interval))); |
e304bfd3 RP |
558 | } |
559 | ||
5bb644a0 JB |
560 | #ifdef CONFIG_PM |
561 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
562 | { | |
563 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
564 | ||
5ee68e5b | 565 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
566 | |
567 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
568 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
569 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
570 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
571 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
572 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
573 | } |
574 | ||
575 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
576 | { | |
577 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
578 | ||
579 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
580 | add_timer(&ifmsh->housekeeping_timer); | |
581 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
582 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
583 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
584 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 585 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
586 | } |
587 | #endif | |
472dbc45 JB |
588 | |
589 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
590 | { | |
591 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
592 | struct ieee80211_local *local = sdata->local; | |
593 | ||
09b17470 JB |
594 | local->fif_other_bss++; |
595 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
596 | atomic_inc(&local->iff_allmultis); | |
597 | ieee80211_configure_filter(local); | |
598 | ||
c7108a71 | 599 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
c7108a71 | 600 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
dbf498fb JC |
601 | /* register sync ops from extensible synchronization framework */ |
602 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
603 | ifmsh->adjusting_tbtt = false; | |
604 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 605 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 606 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 607 | ieee80211_queue_work(&local->hw, &sdata->work); |
70c33eaa AN |
608 | sdata->vif.bss_conf.ht_operation_mode = |
609 | ifmsh->mshcfg.ht_opmode; | |
5b365834 | 610 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
d934f7d0 AN |
611 | sdata->vif.bss_conf.basic_rates = |
612 | ieee80211_mandatory_rates(sdata->local, | |
6962d602 | 613 | sdata->local->oper_channel->band); |
2d0ddec5 | 614 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 | 615 | BSS_CHANGED_BEACON_ENABLED | |
70c33eaa | 616 | BSS_CHANGED_HT | |
d934f7d0 | 617 | BSS_CHANGED_BASIC_RATES | |
5b365834 | 618 | BSS_CHANGED_BEACON_INT); |
c405c629 JB |
619 | |
620 | netif_carrier_on(sdata->dev); | |
472dbc45 JB |
621 | } |
622 | ||
623 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
624 | { | |
09b17470 | 625 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
626 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
627 | ||
c405c629 JB |
628 | netif_carrier_off(sdata->dev); |
629 | ||
0d466b9c | 630 | /* stop the beacon */ |
29cbe68c JB |
631 | ifmsh->mesh_id_len = 0; |
632 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
0d466b9c TP |
633 | |
634 | /* flush STAs and mpaths on this iface */ | |
635 | sta_info_flush(sdata->local, sdata); | |
636 | mesh_path_flush_by_iface(sdata); | |
09b17470 | 637 | |
472dbc45 | 638 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 639 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
dd4c9260 | 640 | del_timer_sync(&sdata->u.mesh.mesh_path_timer); |
b7413430 JB |
641 | /* |
642 | * If the timer fired while we waited for it, it will have | |
643 | * requeued the work. Now the work will be running again | |
644 | * but will not rearm the timer again because it checks | |
645 | * whether the interface is running, which, at this point, | |
646 | * it no longer is. | |
647 | */ | |
64592c8f | 648 | cancel_work_sync(&sdata->work); |
09b17470 JB |
649 | |
650 | local->fif_other_bss--; | |
651 | atomic_dec(&local->iff_allmultis); | |
652 | ieee80211_configure_filter(local); | |
2d9957cc JB |
653 | |
654 | sdata->u.mesh.timers_running = 0; | |
472dbc45 JB |
655 | } |
656 | ||
657 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
658 | u16 stype, | |
659 | struct ieee80211_mgmt *mgmt, | |
660 | size_t len, | |
661 | struct ieee80211_rx_status *rx_status) | |
662 | { | |
c6a1fa12 | 663 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 664 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
665 | struct ieee802_11_elems elems; |
666 | struct ieee80211_channel *channel; | |
472dbc45 JB |
667 | size_t baselen; |
668 | int freq; | |
669 | enum ieee80211_band band = rx_status->band; | |
670 | ||
671 | /* ignore ProbeResp to foreign address */ | |
672 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
b203ca39 | 673 | !ether_addr_equal(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
674 | return; |
675 | ||
676 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
677 | if (baselen > len) | |
678 | return; | |
679 | ||
680 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
681 | &elems); | |
682 | ||
5cff5e01 | 683 | /* ignore beacons from secure mesh peers if our security is off */ |
b130e5ce | 684 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
5cff5e01 JC |
685 | return; |
686 | ||
472dbc45 | 687 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 688 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
689 | else |
690 | freq = rx_status->freq; | |
691 | ||
692 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
693 | ||
694 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
695 | return; | |
696 | ||
697 | if (elems.mesh_id && elems.mesh_config && | |
f743ff49 TP |
698 | mesh_matches_local(sdata, &elems)) |
699 | mesh_neighbour_update(sdata, mgmt->sa, &elems); | |
dbf498fb JC |
700 | |
701 | if (ifmsh->sync_ops) | |
702 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
703 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
704 | } |
705 | ||
706 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
707 | struct ieee80211_mgmt *mgmt, | |
708 | size_t len, | |
709 | struct ieee80211_rx_status *rx_status) | |
710 | { | |
711 | switch (mgmt->u.action.category) { | |
8db09850 TP |
712 | case WLAN_CATEGORY_SELF_PROTECTED: |
713 | switch (mgmt->u.action.u.self_prot.action_code) { | |
714 | case WLAN_SP_MESH_PEERING_OPEN: | |
715 | case WLAN_SP_MESH_PEERING_CLOSE: | |
716 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
717 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
718 | break; | |
719 | } | |
472dbc45 | 720 | break; |
25d49e4d TP |
721 | case WLAN_CATEGORY_MESH_ACTION: |
722 | if (mesh_action_is_path_sel(mgmt)) | |
723 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
724 | break; |
725 | } | |
726 | } | |
727 | ||
1fa57d01 JB |
728 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
729 | struct sk_buff *skb) | |
472dbc45 JB |
730 | { |
731 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
732 | struct ieee80211_mgmt *mgmt; |
733 | u16 stype; | |
734 | ||
f1d58c25 | 735 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
736 | mgmt = (struct ieee80211_mgmt *) skb->data; |
737 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
738 | ||
739 | switch (stype) { | |
740 | case IEEE80211_STYPE_PROBE_RESP: | |
741 | case IEEE80211_STYPE_BEACON: | |
742 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
743 | rx_status); | |
744 | break; | |
745 | case IEEE80211_STYPE_ACTION: | |
746 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
747 | break; | |
748 | } | |
472dbc45 JB |
749 | } |
750 | ||
1fa57d01 | 751 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 752 | { |
472dbc45 | 753 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
754 | |
755 | if (ifmsh->preq_queue_len && | |
756 | time_after(jiffies, | |
757 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
758 | mesh_path_start_discovery(sdata); | |
759 | ||
18889231 JC |
760 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
761 | mesh_mpath_table_grow(); | |
762 | ||
dcac908b | 763 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
764 | mesh_mpp_table_grow(); |
765 | ||
766 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 767 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
768 | |
769 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
770 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
771 | |
772 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
773 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
774 | } |
775 | ||
776 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
777 | { | |
778 | struct ieee80211_sub_if_data *sdata; | |
779 | ||
780 | rcu_read_lock(); | |
781 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
782 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 783 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
784 | rcu_read_unlock(); |
785 | } | |
786 | ||
902acc78 JB |
787 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
788 | { | |
472dbc45 JB |
789 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
790 | ||
472dbc45 JB |
791 | setup_timer(&ifmsh->housekeeping_timer, |
792 | ieee80211_mesh_housekeeping_timer, | |
793 | (unsigned long) sdata); | |
472dbc45 | 794 | |
472dbc45 JB |
795 | ifmsh->accepting_plinks = true; |
796 | ifmsh->preq_id = 0; | |
d19b3bf6 | 797 | ifmsh->sn = 0; |
5ee68e5b | 798 | ifmsh->num_gates = 0; |
472dbc45 | 799 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 800 | mesh_rmc_init(sdata); |
472dbc45 | 801 | ifmsh->last_preq = jiffies; |
dca7e943 | 802 | ifmsh->next_perr = jiffies; |
902acc78 JB |
803 | /* Allocate all mesh structures when creating the first mesh interface. */ |
804 | if (!mesh_allocated) | |
805 | ieee80211s_init(); | |
472dbc45 | 806 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
807 | ieee80211_mesh_path_timer, |
808 | (unsigned long) sdata); | |
e304bfd3 RP |
809 | setup_timer(&ifmsh->mesh_path_root_timer, |
810 | ieee80211_mesh_path_root_timer, | |
811 | (unsigned long) sdata); | |
472dbc45 JB |
812 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
813 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
dbf498fb | 814 | spin_lock_init(&ifmsh->sync_offset_lock); |
472dbc45 | 815 | } |