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 | * | |
67 | * @ie: information elements of a management frame from the mesh peer | |
f698d856 | 68 | * @sdata: local mesh subif |
fe40cb62 | 69 | * @basic_rates: BSSBasicRateSet of the peer candidate |
2e3c8736 LCC |
70 | * |
71 | * This function checks if the mesh configuration of a mesh point matches the | |
72 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
73 | */ | |
fe40cb62 AN |
74 | bool mesh_matches_local(struct ieee802_11_elems *ie, |
75 | struct ieee80211_sub_if_data *sdata, u32 basic_rates) | |
2e3c8736 | 76 | { |
472dbc45 | 77 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
739522ba | 78 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 79 | |
2e3c8736 LCC |
80 | /* |
81 | * As support for each feature is added, check for matching | |
82 | * - On mesh config capabilities | |
83 | * - Power Save Support En | |
84 | * - Sync support enabled | |
85 | * - Sync support active | |
86 | * - Sync support required from peer | |
87 | * - MDA enabled | |
88 | * - Power management control on fc | |
89 | */ | |
739522ba TP |
90 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
91 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
92 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
93 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
94 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
95 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
96 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
97 | goto mismatch; | |
98 | ||
fe40cb62 AN |
99 | if (sdata->vif.bss_conf.basic_rates != basic_rates) |
100 | goto mismatch; | |
101 | ||
739522ba | 102 | /* disallow peering with mismatched channel types for now */ |
074d46d1 | 103 | if (ie->ht_operation && |
739522ba | 104 | (local->_oper_channel_type != |
074d46d1 | 105 | ieee80211_ht_oper_to_channel_type(ie->ht_operation))) |
739522ba | 106 | goto mismatch; |
2e3c8736 | 107 | |
739522ba TP |
108 | return true; |
109 | mismatch: | |
2e3c8736 LCC |
110 | return false; |
111 | } | |
112 | ||
113 | /** | |
114 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
115 | * | |
116 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 117 | */ |
f698d856 | 118 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 119 | { |
136cfa28 | 120 | return (ie->mesh_config->meshconf_cap & |
3491707a | 121 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
122 | } |
123 | ||
124 | /** | |
125 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
126 | * | |
d0709a65 | 127 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 128 | */ |
d0709a65 | 129 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 130 | { |
2e3c8736 LCC |
131 | bool free_plinks; |
132 | ||
133 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
134 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
135 | * are already on the table but are not on PLINK_ESTAB state. However, |
136 | * in general the mesh interface is not accepting peer link requests | |
137 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
138 | */ |
139 | free_plinks = mesh_plink_availables(sdata); | |
140 | ||
472dbc45 JB |
141 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
142 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
143 | } |
144 | ||
f698d856 | 145 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 146 | { |
2e3c8736 LCC |
147 | int i; |
148 | ||
472dbc45 JB |
149 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
150 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 151 | return -ENOMEM; |
472dbc45 | 152 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 153 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 154 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
155 | return 0; |
156 | } | |
157 | ||
f698d856 | 158 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 159 | { |
472dbc45 | 160 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
161 | struct rmc_entry *p, *n; |
162 | int i; | |
163 | ||
472dbc45 | 164 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
165 | return; |
166 | ||
167 | for (i = 0; i < RMC_BUCKETS; i++) | |
168 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
169 | list_del(&p->list); | |
170 | kmem_cache_free(rm_cache, p); | |
171 | } | |
172 | ||
173 | kfree(rmc); | |
472dbc45 | 174 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
175 | } |
176 | ||
177 | /** | |
178 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
179 | * | |
180 | * @sa: source address | |
181 | * @mesh_hdr: mesh_header | |
182 | * | |
183 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
184 | * | |
185 | * Checks using the source address and the mesh sequence number if we have | |
186 | * received this frame lately. If the frame is not in the cache, it is added to | |
187 | * it. | |
188 | */ | |
189 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 190 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 191 | { |
472dbc45 | 192 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
193 | u32 seqnum = 0; |
194 | int entries = 0; | |
195 | u8 idx; | |
196 | struct rmc_entry *p, *n; | |
197 | ||
198 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
199 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
200 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
201 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
202 | ++entries; | |
203 | if (time_after(jiffies, p->exp_time) || | |
204 | (entries == RMC_QUEUE_MAX_LEN)) { | |
205 | list_del(&p->list); | |
206 | kmem_cache_free(rm_cache, p); | |
207 | --entries; | |
f64f9e71 | 208 | } else if ((seqnum == p->seqnum) && |
888d04df | 209 | (compare_ether_addr(sa, p->sa) == 0)) |
2e3c8736 LCC |
210 | return -1; |
211 | } | |
212 | ||
213 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 214 | if (!p) |
2e3c8736 | 215 | return 0; |
d15b8459 | 216 | |
2e3c8736 LCC |
217 | p->seqnum = seqnum; |
218 | p->exp_time = jiffies + RMC_TIMEOUT; | |
219 | memcpy(p->sa, sa, ETH_ALEN); | |
220 | list_add(&p->list, &rmc->bucket[idx].list); | |
221 | return 0; | |
222 | } | |
223 | ||
082ebb0c TP |
224 | int |
225 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
226 | { | |
227 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
228 | u8 *pos, neighbors; | |
229 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
230 | ||
231 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
232 | return -ENOMEM; | |
233 | ||
234 | pos = skb_put(skb, 2 + meshconf_len); | |
235 | *pos++ = WLAN_EID_MESH_CONFIG; | |
236 | *pos++ = meshconf_len; | |
237 | ||
238 | /* Active path selection protocol ID */ | |
239 | *pos++ = ifmsh->mesh_pp_id; | |
240 | /* Active path selection metric ID */ | |
241 | *pos++ = ifmsh->mesh_pm_id; | |
242 | /* Congestion control mode identifier */ | |
243 | *pos++ = ifmsh->mesh_cc_id; | |
244 | /* Synchronization protocol identifier */ | |
245 | *pos++ = ifmsh->mesh_sp_id; | |
246 | /* Authentication Protocol identifier */ | |
247 | *pos++ = ifmsh->mesh_auth_id; | |
248 | /* Mesh Formation Info - number of neighbors */ | |
249 | neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); | |
250 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
251 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
252 | *pos++ = neighbors << 1; | |
253 | /* Mesh capability */ | |
254 | ifmsh->accepting_plinks = mesh_plink_availables(sdata); | |
255 | *pos = MESHCONF_CAPAB_FORWARDING; | |
dbf498fb | 256 | *pos |= ifmsh->accepting_plinks ? |
082ebb0c | 257 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
dbf498fb JC |
258 | *pos++ |= ifmsh->adjusting_tbtt ? |
259 | MESHCONF_CAPAB_TBTT_ADJUSTING : 0x00; | |
082ebb0c TP |
260 | *pos++ = 0x00; |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | int | |
266 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
267 | { | |
268 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
269 | u8 *pos; | |
270 | ||
271 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
272 | return -ENOMEM; | |
273 | ||
274 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
275 | *pos++ = WLAN_EID_MESH_ID; | |
276 | *pos++ = ifmsh->mesh_id_len; | |
277 | if (ifmsh->mesh_id_len) | |
278 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | int | |
284 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
285 | { | |
286 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
287 | u8 offset, len; | |
288 | const u8 *data; | |
289 | ||
290 | if (!ifmsh->ie || !ifmsh->ie_len) | |
291 | return 0; | |
292 | ||
293 | /* fast-forward to vendor IEs */ | |
294 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
295 | ||
296 | if (offset) { | |
297 | len = ifmsh->ie_len - offset; | |
298 | data = ifmsh->ie + offset; | |
299 | if (skb_tailroom(skb) < len) | |
300 | return -ENOMEM; | |
301 | memcpy(skb_put(skb, len), data, len); | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | int | |
308 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
309 | { | |
310 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
311 | u8 len = 0; | |
312 | const u8 *data; | |
313 | ||
314 | if (!ifmsh->ie || !ifmsh->ie_len) | |
315 | return 0; | |
316 | ||
317 | /* find RSN IE */ | |
318 | data = ifmsh->ie; | |
319 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
320 | if (*data == WLAN_EID_RSN) { | |
321 | len = data[1] + 2; | |
322 | break; | |
323 | } | |
324 | data++; | |
325 | } | |
326 | ||
327 | if (len) { | |
328 | if (skb_tailroom(skb) < len) | |
329 | return -ENOMEM; | |
330 | memcpy(skb_put(skb, len), data, len); | |
331 | } | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
082ebb0c TP |
336 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
337 | struct ieee80211_sub_if_data *sdata) | |
338 | { | |
339 | struct ieee80211_local *local = sdata->local; | |
340 | struct ieee80211_supported_band *sband; | |
341 | u8 *pos; | |
2e3c8736 | 342 | |
082ebb0c TP |
343 | if (skb_tailroom(skb) < 3) |
344 | return -ENOMEM; | |
345 | ||
346 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
be125c60 RP |
347 | if (sband->band == IEEE80211_BAND_2GHZ) { |
348 | pos = skb_put(skb, 2 + 1); | |
349 | *pos++ = WLAN_EID_DS_PARAMS; | |
350 | *pos++ = 1; | |
351 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); | |
352 | } | |
353 | ||
082ebb0c | 354 | return 0; |
2e3c8736 LCC |
355 | } |
356 | ||
176f3608 TP |
357 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
358 | struct ieee80211_sub_if_data *sdata) | |
359 | { | |
360 | struct ieee80211_local *local = sdata->local; | |
361 | struct ieee80211_supported_band *sband; | |
362 | u8 *pos; | |
363 | ||
364 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
365 | if (!sband->ht_cap.ht_supported || | |
366 | local->_oper_channel_type == NL80211_CHAN_NO_HT) | |
367 | return 0; | |
368 | ||
369 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
370 | return -ENOMEM; | |
371 | ||
372 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 373 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
374 | |
375 | return 0; | |
376 | } | |
377 | ||
074d46d1 | 378 | int mesh_add_ht_oper_ie(struct sk_buff *skb, |
176f3608 TP |
379 | struct ieee80211_sub_if_data *sdata) |
380 | { | |
381 | struct ieee80211_local *local = sdata->local; | |
382 | struct ieee80211_channel *channel = local->oper_channel; | |
383 | enum nl80211_channel_type channel_type = local->_oper_channel_type; | |
384 | struct ieee80211_supported_band *sband = | |
385 | local->hw.wiphy->bands[channel->band]; | |
386 | struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; | |
387 | u8 *pos; | |
388 | ||
389 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) | |
390 | return 0; | |
391 | ||
074d46d1 | 392 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_operation)) |
176f3608 TP |
393 | return -ENOMEM; |
394 | ||
074d46d1 JB |
395 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
396 | ieee80211_ie_build_ht_oper(pos, ht_cap, channel, channel_type); | |
176f3608 TP |
397 | |
398 | return 0; | |
399 | } | |
2e3c8736 LCC |
400 | static void ieee80211_mesh_path_timer(unsigned long data) |
401 | { | |
402 | struct ieee80211_sub_if_data *sdata = | |
403 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 404 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 405 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 406 | |
5bb644a0 JB |
407 | if (local->quiescing) { |
408 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
409 | return; | |
410 | } | |
411 | ||
64592c8f | 412 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
413 | } |
414 | ||
e304bfd3 RP |
415 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
416 | { | |
417 | struct ieee80211_sub_if_data *sdata = | |
418 | (struct ieee80211_sub_if_data *) data; | |
419 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
420 | struct ieee80211_local *local = sdata->local; | |
421 | ||
422 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
423 | ||
424 | if (local->quiescing) { | |
425 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
426 | return; | |
427 | } | |
428 | ||
64592c8f | 429 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
430 | } |
431 | ||
63c5723b RP |
432 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
433 | { | |
434 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
435 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
436 | else { | |
437 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
438 | /* stop running timer */ | |
439 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
440 | } | |
441 | } | |
442 | ||
3c5772a5 JC |
443 | /** |
444 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
445 | * @hdr: 802.11 frame header | |
446 | * @fc: frame control field | |
447 | * @meshda: destination address in the mesh | |
448 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
449 | * locally originated. | |
450 | * | |
451 | * Return the length of the 802.11 (does not include a mesh control header) | |
452 | */ | |
15ff6365 JB |
453 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
454 | const u8 *meshda, const u8 *meshsa) | |
455 | { | |
3c5772a5 JC |
456 | if (is_multicast_ether_addr(meshda)) { |
457 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
458 | /* DA TA SA */ | |
459 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
460 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
461 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
462 | return 24; | |
463 | } else { | |
2154c81c | 464 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
465 | /* RA TA DA SA */ |
466 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
467 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
468 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
469 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
470 | return 30; | |
471 | } | |
472 | } | |
473 | ||
902acc78 JB |
474 | /** |
475 | * ieee80211_new_mesh_header - create a new mesh header | |
476 | * @meshhdr: uninitialized mesh header | |
477 | * @sdata: mesh interface to be used | |
61ad5394 JC |
478 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
479 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
480 | * be NULL. | |
481 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
482 | * mesh frame | |
902acc78 JB |
483 | * |
484 | * Return the header length. | |
485 | */ | |
486 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
487 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
488 | char *addr6) | |
902acc78 | 489 | { |
3c5772a5 | 490 | int aelen = 0; |
61ad5394 | 491 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 492 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
493 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
494 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
495 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 496 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
497 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
498 | aelen += ETH_ALEN; | |
61ad5394 JC |
499 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
500 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
501 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
502 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
503 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
504 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
505 | } |
506 | return 6 + aelen; | |
902acc78 JB |
507 | } |
508 | ||
472dbc45 JB |
509 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
510 | struct ieee80211_if_mesh *ifmsh) | |
511 | { | |
512 | bool free_plinks; | |
513 | ||
514 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
515 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
47846c9b | 516 | sdata->name); |
472dbc45 JB |
517 | #endif |
518 | ||
519 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
520 | mesh_path_expire(sdata); | |
521 | ||
522 | free_plinks = mesh_plink_availables(sdata); | |
523 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 524 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 525 | |
472dbc45 JB |
526 | mod_timer(&ifmsh->housekeeping_timer, |
527 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
528 | } | |
529 | ||
e304bfd3 RP |
530 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
531 | { | |
532 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
533 | ||
534 | mesh_path_tx_root_frame(sdata); | |
535 | mod_timer(&ifmsh->mesh_path_root_timer, | |
c6133661 TP |
536 | round_jiffies(TU_TO_EXP_TIME( |
537 | ifmsh->mshcfg.dot11MeshHWMPRannInterval))); | |
e304bfd3 RP |
538 | } |
539 | ||
5bb644a0 JB |
540 | #ifdef CONFIG_PM |
541 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
542 | { | |
543 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
544 | ||
5ee68e5b | 545 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
546 | |
547 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
548 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
549 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
550 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
551 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
552 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
553 | } |
554 | ||
555 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
556 | { | |
557 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
558 | ||
559 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
560 | add_timer(&ifmsh->housekeeping_timer); | |
561 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
562 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
563 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
564 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 565 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
566 | } |
567 | #endif | |
472dbc45 JB |
568 | |
569 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
570 | { | |
571 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
572 | struct ieee80211_local *local = sdata->local; | |
573 | ||
09b17470 JB |
574 | local->fif_other_bss++; |
575 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
576 | atomic_inc(&local->iff_allmultis); | |
577 | ieee80211_configure_filter(local); | |
578 | ||
c7108a71 | 579 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
c7108a71 | 580 | ifmsh->mesh_auth_id = 0; /* Disabled */ |
dbf498fb JC |
581 | /* register sync ops from extensible synchronization framework */ |
582 | ifmsh->sync_ops = ieee80211_mesh_sync_ops_get(ifmsh->mesh_sp_id); | |
583 | ifmsh->adjusting_tbtt = false; | |
584 | ifmsh->sync_offset_clockdrift_max = 0; | |
6b9ac442 | 585 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 586 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 587 | ieee80211_queue_work(&local->hw, &sdata->work); |
5b365834 | 588 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
d934f7d0 AN |
589 | sdata->vif.bss_conf.basic_rates = |
590 | ieee80211_mandatory_rates(sdata->local, | |
591 | sdata->local->hw.conf.channel->band); | |
2d0ddec5 | 592 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 | 593 | BSS_CHANGED_BEACON_ENABLED | |
d934f7d0 | 594 | BSS_CHANGED_BASIC_RATES | |
5b365834 | 595 | BSS_CHANGED_BEACON_INT); |
472dbc45 JB |
596 | } |
597 | ||
598 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
599 | { | |
09b17470 | 600 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
601 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
602 | ||
603 | ifmsh->mesh_id_len = 0; | |
604 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
605 | sta_info_flush(local, NULL); | |
09b17470 | 606 | |
472dbc45 | 607 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 608 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
609 | /* |
610 | * If the timer fired while we waited for it, it will have | |
611 | * requeued the work. Now the work will be running again | |
612 | * but will not rearm the timer again because it checks | |
613 | * whether the interface is running, which, at this point, | |
614 | * it no longer is. | |
615 | */ | |
64592c8f | 616 | cancel_work_sync(&sdata->work); |
09b17470 JB |
617 | |
618 | local->fif_other_bss--; | |
619 | atomic_dec(&local->iff_allmultis); | |
620 | ieee80211_configure_filter(local); | |
472dbc45 JB |
621 | } |
622 | ||
623 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
624 | u16 stype, | |
625 | struct ieee80211_mgmt *mgmt, | |
626 | size_t len, | |
627 | struct ieee80211_rx_status *rx_status) | |
628 | { | |
c6a1fa12 | 629 | struct ieee80211_local *local = sdata->local; |
dbf498fb | 630 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
631 | struct ieee802_11_elems elems; |
632 | struct ieee80211_channel *channel; | |
9ebb61a2 | 633 | u32 supp_rates = 0, basic_rates = 0; |
472dbc45 JB |
634 | size_t baselen; |
635 | int freq; | |
636 | enum ieee80211_band band = rx_status->band; | |
637 | ||
638 | /* ignore ProbeResp to foreign address */ | |
639 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
47846c9b | 640 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
641 | return; |
642 | ||
643 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
644 | if (baselen > len) | |
645 | return; | |
646 | ||
647 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
648 | &elems); | |
649 | ||
5cff5e01 | 650 | /* ignore beacons from secure mesh peers if our security is off */ |
b130e5ce | 651 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
5cff5e01 JC |
652 | return; |
653 | ||
472dbc45 | 654 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 655 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
656 | else |
657 | freq = rx_status->freq; | |
658 | ||
659 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
660 | ||
661 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
662 | return; | |
663 | ||
fe40cb62 AN |
664 | supp_rates = ieee80211_sta_get_rates(local, &elems, |
665 | band, &basic_rates); | |
666 | ||
472dbc45 | 667 | if (elems.mesh_id && elems.mesh_config && |
fe40cb62 | 668 | mesh_matches_local(&elems, sdata, basic_rates)) |
1570ca59 | 669 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems); |
dbf498fb JC |
670 | |
671 | if (ifmsh->sync_ops) | |
672 | ifmsh->sync_ops->rx_bcn_presp(sdata, | |
673 | stype, mgmt, &elems, rx_status); | |
472dbc45 JB |
674 | } |
675 | ||
676 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
677 | struct ieee80211_mgmt *mgmt, | |
678 | size_t len, | |
679 | struct ieee80211_rx_status *rx_status) | |
680 | { | |
681 | switch (mgmt->u.action.category) { | |
8db09850 TP |
682 | case WLAN_CATEGORY_SELF_PROTECTED: |
683 | switch (mgmt->u.action.u.self_prot.action_code) { | |
684 | case WLAN_SP_MESH_PEERING_OPEN: | |
685 | case WLAN_SP_MESH_PEERING_CLOSE: | |
686 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
687 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
688 | break; | |
689 | } | |
472dbc45 | 690 | break; |
25d49e4d TP |
691 | case WLAN_CATEGORY_MESH_ACTION: |
692 | if (mesh_action_is_path_sel(mgmt)) | |
693 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
694 | break; |
695 | } | |
696 | } | |
697 | ||
1fa57d01 JB |
698 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
699 | struct sk_buff *skb) | |
472dbc45 JB |
700 | { |
701 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
702 | struct ieee80211_mgmt *mgmt; |
703 | u16 stype; | |
704 | ||
f1d58c25 | 705 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
706 | mgmt = (struct ieee80211_mgmt *) skb->data; |
707 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
708 | ||
709 | switch (stype) { | |
710 | case IEEE80211_STYPE_PROBE_RESP: | |
711 | case IEEE80211_STYPE_BEACON: | |
712 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
713 | rx_status); | |
714 | break; | |
715 | case IEEE80211_STYPE_ACTION: | |
716 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
717 | break; | |
718 | } | |
472dbc45 JB |
719 | } |
720 | ||
1fa57d01 | 721 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 722 | { |
472dbc45 | 723 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
724 | |
725 | if (ifmsh->preq_queue_len && | |
726 | time_after(jiffies, | |
727 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
728 | mesh_path_start_discovery(sdata); | |
729 | ||
18889231 JC |
730 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
731 | mesh_mpath_table_grow(); | |
732 | ||
dcac908b | 733 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
734 | mesh_mpp_table_grow(); |
735 | ||
736 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 737 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
738 | |
739 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
740 | ieee80211_mesh_rootpath(sdata); | |
dbf498fb JC |
741 | |
742 | if (test_and_clear_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags)) | |
743 | mesh_sync_adjust_tbtt(sdata); | |
472dbc45 JB |
744 | } |
745 | ||
746 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
747 | { | |
748 | struct ieee80211_sub_if_data *sdata; | |
749 | ||
750 | rcu_read_lock(); | |
751 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
752 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 753 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
754 | rcu_read_unlock(); |
755 | } | |
756 | ||
902acc78 JB |
757 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
758 | { | |
472dbc45 JB |
759 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
760 | ||
472dbc45 JB |
761 | setup_timer(&ifmsh->housekeeping_timer, |
762 | ieee80211_mesh_housekeeping_timer, | |
763 | (unsigned long) sdata); | |
472dbc45 | 764 | |
472dbc45 JB |
765 | ifmsh->accepting_plinks = true; |
766 | ifmsh->preq_id = 0; | |
d19b3bf6 | 767 | ifmsh->sn = 0; |
5ee68e5b | 768 | ifmsh->num_gates = 0; |
472dbc45 | 769 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 770 | mesh_rmc_init(sdata); |
472dbc45 | 771 | ifmsh->last_preq = jiffies; |
dca7e943 | 772 | ifmsh->next_perr = jiffies; |
902acc78 JB |
773 | /* Allocate all mesh structures when creating the first mesh interface. */ |
774 | if (!mesh_allocated) | |
775 | ieee80211s_init(); | |
472dbc45 | 776 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
777 | ieee80211_mesh_path_timer, |
778 | (unsigned long) sdata); | |
e304bfd3 RP |
779 | setup_timer(&ifmsh->mesh_path_root_timer, |
780 | ieee80211_mesh_path_root_timer, | |
781 | (unsigned long) sdata); | |
472dbc45 JB |
782 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
783 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
dbf498fb | 784 | spin_lock_init(&ifmsh->sync_offset_lock); |
472dbc45 | 785 | } |