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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 | ||
3491707a RP |
16 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 |
17 | #define MESHCONF_CAPAB_FORWARDING 0x08 | |
2e3c8736 | 18 | |
5bb644a0 JB |
19 | #define TMR_RUNNING_HK 0 |
20 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 21 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 22 | |
2e3c8736 LCC |
23 | int mesh_allocated; |
24 | static struct kmem_cache *rm_cache; | |
25 | ||
25d49e4d TP |
26 | #ifdef CONFIG_MAC80211_MESH |
27 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
28 | { | |
29 | return (mgmt->u.action.u.mesh_action.action_code == | |
30 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
31 | } | |
32 | #else | |
33 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
34 | { return false; } | |
35 | #endif | |
36 | ||
2e3c8736 LCC |
37 | void ieee80211s_init(void) |
38 | { | |
39 | mesh_pathtbl_init(); | |
40 | mesh_allocated = 1; | |
41 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
42 | 0, 0, NULL); | |
43 | } | |
44 | ||
45 | void ieee80211s_stop(void) | |
46 | { | |
47 | mesh_pathtbl_unregister(); | |
48 | kmem_cache_destroy(rm_cache); | |
49 | } | |
50 | ||
472dbc45 JB |
51 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
52 | { | |
53 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
54 | struct ieee80211_local *local = sdata->local; | |
55 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
56 | ||
6b9ac442 | 57 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
58 | |
59 | if (local->quiescing) { | |
60 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
61 | return; | |
62 | } | |
63 | ||
64592c8f | 64 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
65 | } |
66 | ||
2e3c8736 LCC |
67 | /** |
68 | * mesh_matches_local - check if the config of a mesh point matches ours | |
69 | * | |
70 | * @ie: information elements of a management frame from the mesh peer | |
f698d856 | 71 | * @sdata: local mesh subif |
2e3c8736 LCC |
72 | * |
73 | * This function checks if the mesh configuration of a mesh point matches the | |
74 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
75 | */ | |
f698d856 | 76 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 77 | { |
472dbc45 | 78 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
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 | */ | |
472dbc45 JB |
90 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
91 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
136cfa28 RP |
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)) | |
2e3c8736 LCC |
97 | return true; |
98 | ||
99 | return false; | |
100 | } | |
101 | ||
102 | /** | |
103 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
104 | * | |
105 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 106 | */ |
f698d856 | 107 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 108 | { |
136cfa28 | 109 | return (ie->mesh_config->meshconf_cap & |
3491707a | 110 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
111 | } |
112 | ||
113 | /** | |
114 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
115 | * | |
d0709a65 | 116 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 117 | */ |
d0709a65 | 118 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 119 | { |
2e3c8736 LCC |
120 | bool free_plinks; |
121 | ||
122 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
123 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
124 | * are already on the table but are not on PLINK_ESTAB state. However, |
125 | * in general the mesh interface is not accepting peer link requests | |
126 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
127 | */ |
128 | free_plinks = mesh_plink_availables(sdata); | |
129 | ||
472dbc45 JB |
130 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
131 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
132 | } |
133 | ||
f698d856 | 134 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 135 | { |
2e3c8736 LCC |
136 | int i; |
137 | ||
472dbc45 JB |
138 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
139 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 140 | return -ENOMEM; |
472dbc45 | 141 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 142 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 143 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
144 | return 0; |
145 | } | |
146 | ||
f698d856 | 147 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 148 | { |
472dbc45 | 149 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
150 | struct rmc_entry *p, *n; |
151 | int i; | |
152 | ||
472dbc45 | 153 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
154 | return; |
155 | ||
156 | for (i = 0; i < RMC_BUCKETS; i++) | |
157 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
158 | list_del(&p->list); | |
159 | kmem_cache_free(rm_cache, p); | |
160 | } | |
161 | ||
162 | kfree(rmc); | |
472dbc45 | 163 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
164 | } |
165 | ||
166 | /** | |
167 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
168 | * | |
169 | * @sa: source address | |
170 | * @mesh_hdr: mesh_header | |
171 | * | |
172 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
173 | * | |
174 | * Checks using the source address and the mesh sequence number if we have | |
175 | * received this frame lately. If the frame is not in the cache, it is added to | |
176 | * it. | |
177 | */ | |
178 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 179 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 180 | { |
472dbc45 | 181 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
182 | u32 seqnum = 0; |
183 | int entries = 0; | |
184 | u8 idx; | |
185 | struct rmc_entry *p, *n; | |
186 | ||
187 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
188 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
189 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
190 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
191 | ++entries; | |
192 | if (time_after(jiffies, p->exp_time) || | |
193 | (entries == RMC_QUEUE_MAX_LEN)) { | |
194 | list_del(&p->list); | |
195 | kmem_cache_free(rm_cache, p); | |
196 | --entries; | |
f64f9e71 JP |
197 | } else if ((seqnum == p->seqnum) && |
198 | (memcmp(sa, p->sa, ETH_ALEN) == 0)) | |
2e3c8736 LCC |
199 | return -1; |
200 | } | |
201 | ||
202 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
203 | if (!p) { | |
204 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); | |
205 | return 0; | |
206 | } | |
207 | p->seqnum = seqnum; | |
208 | p->exp_time = jiffies + RMC_TIMEOUT; | |
209 | memcpy(p->sa, sa, ETH_ALEN); | |
210 | list_add(&p->list, &rmc->bucket[idx].list); | |
211 | return 0; | |
212 | } | |
213 | ||
082ebb0c TP |
214 | int |
215 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
216 | { | |
217 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
218 | u8 *pos, neighbors; | |
219 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
220 | ||
221 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
222 | return -ENOMEM; | |
223 | ||
224 | pos = skb_put(skb, 2 + meshconf_len); | |
225 | *pos++ = WLAN_EID_MESH_CONFIG; | |
226 | *pos++ = meshconf_len; | |
227 | ||
228 | /* Active path selection protocol ID */ | |
229 | *pos++ = ifmsh->mesh_pp_id; | |
230 | /* Active path selection metric ID */ | |
231 | *pos++ = ifmsh->mesh_pm_id; | |
232 | /* Congestion control mode identifier */ | |
233 | *pos++ = ifmsh->mesh_cc_id; | |
234 | /* Synchronization protocol identifier */ | |
235 | *pos++ = ifmsh->mesh_sp_id; | |
236 | /* Authentication Protocol identifier */ | |
237 | *pos++ = ifmsh->mesh_auth_id; | |
238 | /* Mesh Formation Info - number of neighbors */ | |
239 | neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); | |
240 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
241 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
242 | *pos++ = neighbors << 1; | |
243 | /* Mesh capability */ | |
244 | ifmsh->accepting_plinks = mesh_plink_availables(sdata); | |
245 | *pos = MESHCONF_CAPAB_FORWARDING; | |
246 | *pos++ |= ifmsh->accepting_plinks ? | |
247 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; | |
248 | *pos++ = 0x00; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | int | |
254 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
255 | { | |
256 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
257 | u8 *pos; | |
258 | ||
259 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
260 | return -ENOMEM; | |
261 | ||
262 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
263 | *pos++ = WLAN_EID_MESH_ID; | |
264 | *pos++ = ifmsh->mesh_id_len; | |
265 | if (ifmsh->mesh_id_len) | |
266 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | int | |
272 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
273 | { | |
274 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
275 | u8 offset, len; | |
276 | const u8 *data; | |
277 | ||
278 | if (!ifmsh->ie || !ifmsh->ie_len) | |
279 | return 0; | |
280 | ||
281 | /* fast-forward to vendor IEs */ | |
282 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
283 | ||
284 | if (offset) { | |
285 | len = ifmsh->ie_len - offset; | |
286 | data = ifmsh->ie + offset; | |
287 | if (skb_tailroom(skb) < len) | |
288 | return -ENOMEM; | |
289 | memcpy(skb_put(skb, len), data, len); | |
290 | } | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
295 | int | |
296 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
297 | { | |
298 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
299 | u8 len = 0; | |
300 | const u8 *data; | |
301 | ||
302 | if (!ifmsh->ie || !ifmsh->ie_len) | |
303 | return 0; | |
304 | ||
305 | /* find RSN IE */ | |
306 | data = ifmsh->ie; | |
307 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
308 | if (*data == WLAN_EID_RSN) { | |
309 | len = data[1] + 2; | |
310 | break; | |
311 | } | |
312 | data++; | |
313 | } | |
314 | ||
315 | if (len) { | |
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_srates_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
2e3c8736 | 326 | { |
f698d856 | 327 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 328 | struct ieee80211_supported_band *sband; |
082ebb0c TP |
329 | int rate; |
330 | u8 i, rates, *pos; | |
2e3c8736 LCC |
331 | |
332 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
082ebb0c TP |
333 | rates = sband->n_bitrates; |
334 | if (rates > 8) | |
335 | rates = 8; | |
336 | ||
337 | if (skb_tailroom(skb) < rates + 2) | |
338 | return -ENOMEM; | |
339 | ||
340 | pos = skb_put(skb, rates + 2); | |
2e3c8736 | 341 | *pos++ = WLAN_EID_SUPP_RATES; |
082ebb0c TP |
342 | *pos++ = rates; |
343 | for (i = 0; i < rates; i++) { | |
2e3c8736 LCC |
344 | rate = sband->bitrates[i].bitrate; |
345 | *pos++ = (u8) (rate / 5); | |
346 | } | |
347 | ||
082ebb0c TP |
348 | return 0; |
349 | } | |
350 | ||
351 | int | |
352 | mesh_add_ext_srates_ie(struct sk_buff *skb, | |
353 | struct ieee80211_sub_if_data *sdata) | |
354 | { | |
355 | struct ieee80211_local *local = sdata->local; | |
356 | struct ieee80211_supported_band *sband; | |
357 | int rate; | |
358 | u8 i, exrates, *pos; | |
359 | ||
360 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
361 | exrates = sband->n_bitrates; | |
362 | if (exrates > 8) | |
363 | exrates -= 8; | |
364 | else | |
365 | exrates = 0; | |
366 | ||
367 | if (skb_tailroom(skb) < exrates + 2) | |
368 | return -ENOMEM; | |
369 | ||
370 | if (exrates) { | |
371 | pos = skb_put(skb, exrates + 2); | |
2e3c8736 | 372 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
082ebb0c TP |
373 | *pos++ = exrates; |
374 | for (i = 8; i < sband->n_bitrates; i++) { | |
2e3c8736 LCC |
375 | rate = sband->bitrates[i].bitrate; |
376 | *pos++ = (u8) (rate / 5); | |
377 | } | |
378 | } | |
082ebb0c TP |
379 | return 0; |
380 | } | |
381 | ||
382 | int mesh_add_ds_params_ie(struct sk_buff *skb, | |
383 | struct ieee80211_sub_if_data *sdata) | |
384 | { | |
385 | struct ieee80211_local *local = sdata->local; | |
386 | struct ieee80211_supported_band *sband; | |
387 | u8 *pos; | |
2e3c8736 | 388 | |
082ebb0c TP |
389 | if (skb_tailroom(skb) < 3) |
390 | return -ENOMEM; | |
391 | ||
392 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
be125c60 RP |
393 | if (sband->band == IEEE80211_BAND_2GHZ) { |
394 | pos = skb_put(skb, 2 + 1); | |
395 | *pos++ = WLAN_EID_DS_PARAMS; | |
396 | *pos++ = 1; | |
397 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); | |
398 | } | |
399 | ||
082ebb0c | 400 | return 0; |
2e3c8736 LCC |
401 | } |
402 | ||
2e3c8736 LCC |
403 | static void ieee80211_mesh_path_timer(unsigned long data) |
404 | { | |
405 | struct ieee80211_sub_if_data *sdata = | |
406 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 407 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 408 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 409 | |
5bb644a0 JB |
410 | if (local->quiescing) { |
411 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
412 | return; | |
413 | } | |
414 | ||
64592c8f | 415 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
416 | } |
417 | ||
e304bfd3 RP |
418 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
419 | { | |
420 | struct ieee80211_sub_if_data *sdata = | |
421 | (struct ieee80211_sub_if_data *) data; | |
422 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
423 | struct ieee80211_local *local = sdata->local; | |
424 | ||
425 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
426 | ||
427 | if (local->quiescing) { | |
428 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
429 | return; | |
430 | } | |
431 | ||
64592c8f | 432 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
433 | } |
434 | ||
63c5723b RP |
435 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
436 | { | |
437 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
438 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
439 | else { | |
440 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
441 | /* stop running timer */ | |
442 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
443 | } | |
444 | } | |
445 | ||
3c5772a5 JC |
446 | /** |
447 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
448 | * @hdr: 802.11 frame header | |
449 | * @fc: frame control field | |
450 | * @meshda: destination address in the mesh | |
451 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
452 | * locally originated. | |
453 | * | |
454 | * Return the length of the 802.11 (does not include a mesh control header) | |
455 | */ | |
15ff6365 JB |
456 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
457 | const u8 *meshda, const u8 *meshsa) | |
458 | { | |
3c5772a5 JC |
459 | if (is_multicast_ether_addr(meshda)) { |
460 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
461 | /* DA TA SA */ | |
462 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
463 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
464 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
465 | return 24; | |
466 | } else { | |
467 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
468 | IEEE80211_FCTL_TODS); | |
469 | /* RA TA DA SA */ | |
470 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
471 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
472 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
473 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
474 | return 30; | |
475 | } | |
476 | } | |
477 | ||
902acc78 JB |
478 | /** |
479 | * ieee80211_new_mesh_header - create a new mesh header | |
480 | * @meshhdr: uninitialized mesh header | |
481 | * @sdata: mesh interface to be used | |
61ad5394 JC |
482 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
483 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
484 | * be NULL. | |
485 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
486 | * mesh frame | |
902acc78 JB |
487 | * |
488 | * Return the header length. | |
489 | */ | |
490 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
491 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
492 | char *addr6) | |
902acc78 | 493 | { |
3c5772a5 | 494 | int aelen = 0; |
61ad5394 | 495 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 496 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
497 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
498 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
499 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 500 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
501 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
502 | aelen += ETH_ALEN; | |
61ad5394 JC |
503 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
504 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
505 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
506 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
507 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
508 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
509 | } |
510 | return 6 + aelen; | |
902acc78 JB |
511 | } |
512 | ||
472dbc45 JB |
513 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
514 | struct ieee80211_if_mesh *ifmsh) | |
515 | { | |
516 | bool free_plinks; | |
517 | ||
518 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
519 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
47846c9b | 520 | sdata->name); |
472dbc45 JB |
521 | #endif |
522 | ||
523 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
524 | mesh_path_expire(sdata); | |
525 | ||
526 | free_plinks = mesh_plink_availables(sdata); | |
527 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 528 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 529 | |
472dbc45 JB |
530 | mod_timer(&ifmsh->housekeeping_timer, |
531 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
532 | } | |
533 | ||
e304bfd3 RP |
534 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
535 | { | |
536 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
537 | ||
538 | mesh_path_tx_root_frame(sdata); | |
539 | mod_timer(&ifmsh->mesh_path_root_timer, | |
0507e159 JC |
540 | round_jiffies(jiffies + |
541 | usecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPRannInterval * 1024))); | |
e304bfd3 RP |
542 | } |
543 | ||
5bb644a0 JB |
544 | #ifdef CONFIG_PM |
545 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
546 | { | |
547 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
548 | ||
5ee68e5b | 549 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
550 | |
551 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
552 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
553 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
554 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
555 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
556 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
557 | } |
558 | ||
559 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
560 | { | |
561 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
562 | ||
563 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
564 | add_timer(&ifmsh->housekeeping_timer); | |
565 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
566 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
567 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
568 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 569 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
570 | } |
571 | #endif | |
472dbc45 JB |
572 | |
573 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
574 | { | |
575 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
576 | struct ieee80211_local *local = sdata->local; | |
577 | ||
09b17470 JB |
578 | local->fif_other_bss++; |
579 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
580 | atomic_inc(&local->iff_allmultis); | |
581 | ieee80211_configure_filter(local); | |
582 | ||
c7108a71 JC |
583 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
584 | ifmsh->mesh_sp_id = 0; /* Neighbor Offset */ | |
585 | ifmsh->mesh_auth_id = 0; /* Disabled */ | |
6b9ac442 | 586 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 587 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 588 | ieee80211_queue_work(&local->hw, &sdata->work); |
5b365834 | 589 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 590 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
591 | BSS_CHANGED_BEACON_ENABLED | |
592 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
593 | } |
594 | ||
595 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
596 | { | |
09b17470 | 597 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
598 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
599 | ||
600 | ifmsh->mesh_id_len = 0; | |
601 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
602 | sta_info_flush(local, NULL); | |
09b17470 | 603 | |
472dbc45 | 604 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 605 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
606 | /* |
607 | * If the timer fired while we waited for it, it will have | |
608 | * requeued the work. Now the work will be running again | |
609 | * but will not rearm the timer again because it checks | |
610 | * whether the interface is running, which, at this point, | |
611 | * it no longer is. | |
612 | */ | |
64592c8f | 613 | cancel_work_sync(&sdata->work); |
09b17470 JB |
614 | |
615 | local->fif_other_bss--; | |
616 | atomic_dec(&local->iff_allmultis); | |
617 | ieee80211_configure_filter(local); | |
472dbc45 JB |
618 | } |
619 | ||
620 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
621 | u16 stype, | |
622 | struct ieee80211_mgmt *mgmt, | |
623 | size_t len, | |
624 | struct ieee80211_rx_status *rx_status) | |
625 | { | |
c6a1fa12 | 626 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
627 | struct ieee802_11_elems elems; |
628 | struct ieee80211_channel *channel; | |
881d948c | 629 | u32 supp_rates = 0; |
472dbc45 JB |
630 | size_t baselen; |
631 | int freq; | |
632 | enum ieee80211_band band = rx_status->band; | |
633 | ||
634 | /* ignore ProbeResp to foreign address */ | |
635 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
47846c9b | 636 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
637 | return; |
638 | ||
639 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
640 | if (baselen > len) | |
641 | return; | |
642 | ||
643 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
644 | &elems); | |
645 | ||
5cff5e01 | 646 | /* ignore beacons from secure mesh peers if our security is off */ |
b130e5ce | 647 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
5cff5e01 JC |
648 | return; |
649 | ||
472dbc45 | 650 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 651 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
652 | else |
653 | freq = rx_status->freq; | |
654 | ||
655 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
656 | ||
657 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
658 | return; | |
659 | ||
660 | if (elems.mesh_id && elems.mesh_config && | |
661 | mesh_matches_local(&elems, sdata)) { | |
662 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
1570ca59 | 663 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems); |
472dbc45 JB |
664 | } |
665 | } | |
666 | ||
667 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
668 | struct ieee80211_mgmt *mgmt, | |
669 | size_t len, | |
670 | struct ieee80211_rx_status *rx_status) | |
671 | { | |
672 | switch (mgmt->u.action.category) { | |
8db09850 TP |
673 | case WLAN_CATEGORY_SELF_PROTECTED: |
674 | switch (mgmt->u.action.u.self_prot.action_code) { | |
675 | case WLAN_SP_MESH_PEERING_OPEN: | |
676 | case WLAN_SP_MESH_PEERING_CLOSE: | |
677 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
678 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
679 | break; | |
680 | } | |
472dbc45 | 681 | break; |
25d49e4d TP |
682 | case WLAN_CATEGORY_MESH_ACTION: |
683 | if (mesh_action_is_path_sel(mgmt)) | |
684 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
685 | break; |
686 | } | |
687 | } | |
688 | ||
1fa57d01 JB |
689 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
690 | struct sk_buff *skb) | |
472dbc45 JB |
691 | { |
692 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
693 | struct ieee80211_mgmt *mgmt; |
694 | u16 stype; | |
695 | ||
f1d58c25 | 696 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
697 | mgmt = (struct ieee80211_mgmt *) skb->data; |
698 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
699 | ||
700 | switch (stype) { | |
701 | case IEEE80211_STYPE_PROBE_RESP: | |
702 | case IEEE80211_STYPE_BEACON: | |
703 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
704 | rx_status); | |
705 | break; | |
706 | case IEEE80211_STYPE_ACTION: | |
707 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
708 | break; | |
709 | } | |
472dbc45 JB |
710 | } |
711 | ||
1fa57d01 | 712 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 713 | { |
472dbc45 | 714 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
715 | |
716 | if (ifmsh->preq_queue_len && | |
717 | time_after(jiffies, | |
718 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
719 | mesh_path_start_discovery(sdata); | |
720 | ||
18889231 JC |
721 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
722 | mesh_mpath_table_grow(); | |
723 | ||
dcac908b | 724 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
725 | mesh_mpp_table_grow(); |
726 | ||
727 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 728 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
729 | |
730 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
731 | ieee80211_mesh_rootpath(sdata); | |
472dbc45 JB |
732 | } |
733 | ||
734 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
735 | { | |
736 | struct ieee80211_sub_if_data *sdata; | |
737 | ||
738 | rcu_read_lock(); | |
739 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
740 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 741 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
742 | rcu_read_unlock(); |
743 | } | |
744 | ||
902acc78 JB |
745 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
746 | { | |
472dbc45 JB |
747 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
748 | ||
472dbc45 JB |
749 | setup_timer(&ifmsh->housekeeping_timer, |
750 | ieee80211_mesh_housekeeping_timer, | |
751 | (unsigned long) sdata); | |
472dbc45 | 752 | |
472dbc45 JB |
753 | ifmsh->accepting_plinks = true; |
754 | ifmsh->preq_id = 0; | |
d19b3bf6 | 755 | ifmsh->sn = 0; |
5ee68e5b | 756 | ifmsh->num_gates = 0; |
472dbc45 | 757 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 758 | mesh_rmc_init(sdata); |
472dbc45 | 759 | ifmsh->last_preq = jiffies; |
902acc78 JB |
760 | /* Allocate all mesh structures when creating the first mesh interface. */ |
761 | if (!mesh_allocated) | |
762 | ieee80211s_init(); | |
472dbc45 | 763 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
764 | ieee80211_mesh_path_timer, |
765 | (unsigned long) sdata); | |
e304bfd3 RP |
766 | setup_timer(&ifmsh->mesh_path_root_timer, |
767 | ieee80211_mesh_path_root_timer, | |
768 | (unsigned long) sdata); | |
472dbc45 JB |
769 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
770 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
771 | } |