Root/
1 | /* |
2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
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 | |
11 | #include <linux/slab.h> |
12 | #include <asm/unaligned.h> |
13 | #include "ieee80211_i.h" |
14 | #include "mesh.h" |
15 | |
16 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
17 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) |
18 | #define IEEE80211_MESH_RANN_INTERVAL (1 * HZ) |
19 | |
20 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 |
21 | #define MESHCONF_CAPAB_FORWARDING 0x08 |
22 | |
23 | #define TMR_RUNNING_HK 0 |
24 | #define TMR_RUNNING_MP 1 |
25 | #define TMR_RUNNING_MPR 2 |
26 | |
27 | int mesh_allocated; |
28 | static struct kmem_cache *rm_cache; |
29 | |
30 | void ieee80211s_init(void) |
31 | { |
32 | mesh_pathtbl_init(); |
33 | mesh_allocated = 1; |
34 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), |
35 | 0, 0, NULL); |
36 | } |
37 | |
38 | void ieee80211s_stop(void) |
39 | { |
40 | mesh_pathtbl_unregister(); |
41 | kmem_cache_destroy(rm_cache); |
42 | } |
43 | |
44 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
45 | { |
46 | struct ieee80211_sub_if_data *sdata = (void *) data; |
47 | struct ieee80211_local *local = sdata->local; |
48 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
49 | |
50 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
51 | |
52 | if (local->quiescing) { |
53 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
54 | return; |
55 | } |
56 | |
57 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
58 | } |
59 | |
60 | /** |
61 | * mesh_matches_local - check if the config of a mesh point matches ours |
62 | * |
63 | * @ie: information elements of a management frame from the mesh peer |
64 | * @sdata: local mesh subif |
65 | * |
66 | * This function checks if the mesh configuration of a mesh point matches the |
67 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. |
68 | */ |
69 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
70 | { |
71 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
72 | |
73 | /* |
74 | * As support for each feature is added, check for matching |
75 | * - On mesh config capabilities |
76 | * - Power Save Support En |
77 | * - Sync support enabled |
78 | * - Sync support active |
79 | * - Sync support required from peer |
80 | * - MDA enabled |
81 | * - Power management control on fc |
82 | */ |
83 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
84 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && |
85 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && |
86 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && |
87 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && |
88 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && |
89 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)) |
90 | return true; |
91 | |
92 | return false; |
93 | } |
94 | |
95 | /** |
96 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links |
97 | * |
98 | * @ie: information elements of a management frame from the mesh peer |
99 | */ |
100 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
101 | { |
102 | return (ie->mesh_config->meshconf_cap & |
103 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
104 | } |
105 | |
106 | /** |
107 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons |
108 | * |
109 | * @sdata: mesh interface in which mesh beacons are going to be updated |
110 | */ |
111 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
112 | { |
113 | bool free_plinks; |
114 | |
115 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, |
116 | * the mesh interface might be able to establish plinks with peers that |
117 | * are already on the table but are not on PLINK_ESTAB state. However, |
118 | * in general the mesh interface is not accepting peer link requests |
119 | * from new peers, and that must be reflected in the beacon |
120 | */ |
121 | free_plinks = mesh_plink_availables(sdata); |
122 | |
123 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
124 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); |
125 | } |
126 | |
127 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
128 | { |
129 | sta->mesh_pp_id = 0; /* HWMP */ |
130 | sta->mesh_pm_id = 0; /* Airtime */ |
131 | sta->mesh_cc_id = 0; /* Disabled */ |
132 | sta->mesh_sp_id = 0; /* Neighbor Offset */ |
133 | sta->mesh_auth_id = 0; /* Disabled */ |
134 | } |
135 | |
136 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
137 | { |
138 | int i; |
139 | |
140 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
141 | if (!sdata->u.mesh.rmc) |
142 | return -ENOMEM; |
143 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
144 | for (i = 0; i < RMC_BUCKETS; i++) |
145 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
146 | return 0; |
147 | } |
148 | |
149 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
150 | { |
151 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
152 | struct rmc_entry *p, *n; |
153 | int i; |
154 | |
155 | if (!sdata->u.mesh.rmc) |
156 | return; |
157 | |
158 | for (i = 0; i < RMC_BUCKETS; i++) |
159 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { |
160 | list_del(&p->list); |
161 | kmem_cache_free(rm_cache, p); |
162 | } |
163 | |
164 | kfree(rmc); |
165 | sdata->u.mesh.rmc = NULL; |
166 | } |
167 | |
168 | /** |
169 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. |
170 | * |
171 | * @sa: source address |
172 | * @mesh_hdr: mesh_header |
173 | * |
174 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. |
175 | * |
176 | * Checks using the source address and the mesh sequence number if we have |
177 | * received this frame lately. If the frame is not in the cache, it is added to |
178 | * it. |
179 | */ |
180 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, |
181 | struct ieee80211_sub_if_data *sdata) |
182 | { |
183 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
184 | u32 seqnum = 0; |
185 | int entries = 0; |
186 | u8 idx; |
187 | struct rmc_entry *p, *n; |
188 | |
189 | /* Don't care about endianness since only match matters */ |
190 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
191 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; |
192 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
193 | ++entries; |
194 | if (time_after(jiffies, p->exp_time) || |
195 | (entries == RMC_QUEUE_MAX_LEN)) { |
196 | list_del(&p->list); |
197 | kmem_cache_free(rm_cache, p); |
198 | --entries; |
199 | } else if ((seqnum == p->seqnum) && |
200 | (memcmp(sa, p->sa, ETH_ALEN) == 0)) |
201 | return -1; |
202 | } |
203 | |
204 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); |
205 | if (!p) { |
206 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); |
207 | return 0; |
208 | } |
209 | p->seqnum = seqnum; |
210 | p->exp_time = jiffies + RMC_TIMEOUT; |
211 | memcpy(p->sa, sa, ETH_ALEN); |
212 | list_add(&p->list, &rmc->bucket[idx].list); |
213 | return 0; |
214 | } |
215 | |
216 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
217 | { |
218 | struct ieee80211_local *local = sdata->local; |
219 | struct ieee80211_supported_band *sband; |
220 | u8 *pos; |
221 | int len, i, rate; |
222 | u8 neighbors; |
223 | |
224 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; |
225 | len = sband->n_bitrates; |
226 | if (len > 8) |
227 | len = 8; |
228 | pos = skb_put(skb, len + 2); |
229 | *pos++ = WLAN_EID_SUPP_RATES; |
230 | *pos++ = len; |
231 | for (i = 0; i < len; i++) { |
232 | rate = sband->bitrates[i].bitrate; |
233 | *pos++ = (u8) (rate / 5); |
234 | } |
235 | |
236 | if (sband->n_bitrates > len) { |
237 | pos = skb_put(skb, sband->n_bitrates - len + 2); |
238 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
239 | *pos++ = sband->n_bitrates - len; |
240 | for (i = len; i < sband->n_bitrates; i++) { |
241 | rate = sband->bitrates[i].bitrate; |
242 | *pos++ = (u8) (rate / 5); |
243 | } |
244 | } |
245 | |
246 | if (sband->band == IEEE80211_BAND_2GHZ) { |
247 | pos = skb_put(skb, 2 + 1); |
248 | *pos++ = WLAN_EID_DS_PARAMS; |
249 | *pos++ = 1; |
250 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); |
251 | } |
252 | |
253 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
254 | *pos++ = WLAN_EID_MESH_ID; |
255 | *pos++ = sdata->u.mesh.mesh_id_len; |
256 | if (sdata->u.mesh.mesh_id_len) |
257 | memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); |
258 | |
259 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie)); |
260 | *pos++ = WLAN_EID_MESH_CONFIG; |
261 | *pos++ = sizeof(struct ieee80211_meshconf_ie); |
262 | |
263 | /* Active path selection protocol ID */ |
264 | *pos++ = sdata->u.mesh.mesh_pp_id; |
265 | |
266 | /* Active path selection metric ID */ |
267 | *pos++ = sdata->u.mesh.mesh_pm_id; |
268 | |
269 | /* Congestion control mode identifier */ |
270 | *pos++ = sdata->u.mesh.mesh_cc_id; |
271 | |
272 | /* Synchronization protocol identifier */ |
273 | *pos++ = sdata->u.mesh.mesh_sp_id; |
274 | |
275 | /* Authentication Protocol identifier */ |
276 | *pos++ = sdata->u.mesh.mesh_auth_id; |
277 | |
278 | /* Mesh Formation Info - number of neighbors */ |
279 | neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks); |
280 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ |
281 | neighbors = (neighbors > 15) ? 15 : neighbors; |
282 | *pos++ = neighbors << 1; |
283 | |
284 | /* Mesh capability */ |
285 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
286 | *pos = MESHCONF_CAPAB_FORWARDING; |
287 | *pos++ |= sdata->u.mesh.accepting_plinks ? |
288 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; |
289 | *pos++ = 0x00; |
290 | |
291 | return; |
292 | } |
293 | |
294 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
295 | { |
296 | /* Use last four bytes of hw addr and interface index as hash index */ |
297 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
298 | & tbl->hash_mask; |
299 | } |
300 | |
301 | struct mesh_table *mesh_table_alloc(int size_order) |
302 | { |
303 | int i; |
304 | struct mesh_table *newtbl; |
305 | |
306 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); |
307 | if (!newtbl) |
308 | return NULL; |
309 | |
310 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * |
311 | (1 << size_order), GFP_KERNEL); |
312 | |
313 | if (!newtbl->hash_buckets) { |
314 | kfree(newtbl); |
315 | return NULL; |
316 | } |
317 | |
318 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * |
319 | (1 << size_order), GFP_KERNEL); |
320 | if (!newtbl->hashwlock) { |
321 | kfree(newtbl->hash_buckets); |
322 | kfree(newtbl); |
323 | return NULL; |
324 | } |
325 | |
326 | newtbl->size_order = size_order; |
327 | newtbl->hash_mask = (1 << size_order) - 1; |
328 | atomic_set(&newtbl->entries, 0); |
329 | get_random_bytes(&newtbl->hash_rnd, |
330 | sizeof(newtbl->hash_rnd)); |
331 | for (i = 0; i <= newtbl->hash_mask; i++) |
332 | spin_lock_init(&newtbl->hashwlock[i]); |
333 | |
334 | return newtbl; |
335 | } |
336 | |
337 | |
338 | static void ieee80211_mesh_path_timer(unsigned long data) |
339 | { |
340 | struct ieee80211_sub_if_data *sdata = |
341 | (struct ieee80211_sub_if_data *) data; |
342 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
343 | struct ieee80211_local *local = sdata->local; |
344 | |
345 | if (local->quiescing) { |
346 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
347 | return; |
348 | } |
349 | |
350 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
351 | } |
352 | |
353 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
354 | { |
355 | struct ieee80211_sub_if_data *sdata = |
356 | (struct ieee80211_sub_if_data *) data; |
357 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
358 | struct ieee80211_local *local = sdata->local; |
359 | |
360 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
361 | |
362 | if (local->quiescing) { |
363 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
364 | return; |
365 | } |
366 | |
367 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
368 | } |
369 | |
370 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
371 | { |
372 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) |
373 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
374 | else { |
375 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); |
376 | /* stop running timer */ |
377 | del_timer_sync(&ifmsh->mesh_path_root_timer); |
378 | } |
379 | } |
380 | |
381 | /** |
382 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame |
383 | * @hdr: 802.11 frame header |
384 | * @fc: frame control field |
385 | * @meshda: destination address in the mesh |
386 | * @meshsa: source address address in the mesh. Same as TA, as frame is |
387 | * locally originated. |
388 | * |
389 | * Return the length of the 802.11 (does not include a mesh control header) |
390 | */ |
391 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
392 | const u8 *meshda, const u8 *meshsa) |
393 | { |
394 | if (is_multicast_ether_addr(meshda)) { |
395 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
396 | /* DA TA SA */ |
397 | memcpy(hdr->addr1, meshda, ETH_ALEN); |
398 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
399 | memcpy(hdr->addr3, meshsa, ETH_ALEN); |
400 | return 24; |
401 | } else { |
402 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | |
403 | IEEE80211_FCTL_TODS); |
404 | /* RA TA DA SA */ |
405 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ |
406 | memcpy(hdr->addr2, meshsa, ETH_ALEN); |
407 | memcpy(hdr->addr3, meshda, ETH_ALEN); |
408 | memcpy(hdr->addr4, meshsa, ETH_ALEN); |
409 | return 30; |
410 | } |
411 | } |
412 | |
413 | /** |
414 | * ieee80211_new_mesh_header - create a new mesh header |
415 | * @meshhdr: uninitialized mesh header |
416 | * @sdata: mesh interface to be used |
417 | * @addr4: addr4 of the mesh frame (1st in ae header) |
418 | * may be NULL |
419 | * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) |
420 | * may be NULL unless addr6 is present |
421 | * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) |
422 | * may be NULL unless addr5 is present |
423 | * |
424 | * Return the header length. |
425 | */ |
426 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, |
427 | struct ieee80211_sub_if_data *sdata, char *addr4, |
428 | char *addr5, char *addr6) |
429 | { |
430 | int aelen = 0; |
431 | memset(meshhdr, 0, sizeof(*meshhdr)); |
432 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
433 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); |
434 | sdata->u.mesh.mesh_seqnum++; |
435 | if (addr4) { |
436 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
437 | aelen += ETH_ALEN; |
438 | memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); |
439 | } |
440 | if (addr5 && addr6) { |
441 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
442 | aelen += 2 * ETH_ALEN; |
443 | if (!addr4) { |
444 | memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); |
445 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); |
446 | } else { |
447 | memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); |
448 | memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); |
449 | } |
450 | } |
451 | return 6 + aelen; |
452 | } |
453 | |
454 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
455 | struct ieee80211_if_mesh *ifmsh) |
456 | { |
457 | bool free_plinks; |
458 | |
459 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
460 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", |
461 | sdata->name); |
462 | #endif |
463 | |
464 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); |
465 | mesh_path_expire(sdata); |
466 | |
467 | free_plinks = mesh_plink_availables(sdata); |
468 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
469 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
470 | |
471 | mod_timer(&ifmsh->housekeeping_timer, |
472 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); |
473 | } |
474 | |
475 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
476 | { |
477 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
478 | |
479 | mesh_path_tx_root_frame(sdata); |
480 | mod_timer(&ifmsh->mesh_path_root_timer, |
481 | round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); |
482 | } |
483 | |
484 | #ifdef CONFIG_PM |
485 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) |
486 | { |
487 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
488 | |
489 | /* might restart the timer but that doesn't matter */ |
490 | cancel_work_sync(&ifmsh->work); |
491 | |
492 | /* use atomic bitops in case both timers fire at the same time */ |
493 | |
494 | if (del_timer_sync(&ifmsh->housekeeping_timer)) |
495 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); |
496 | if (del_timer_sync(&ifmsh->mesh_path_timer)) |
497 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); |
498 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
499 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); |
500 | } |
501 | |
502 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) |
503 | { |
504 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
505 | |
506 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) |
507 | add_timer(&ifmsh->housekeeping_timer); |
508 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) |
509 | add_timer(&ifmsh->mesh_path_timer); |
510 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
511 | add_timer(&ifmsh->mesh_path_root_timer); |
512 | ieee80211_mesh_root_setup(ifmsh); |
513 | } |
514 | #endif |
515 | |
516 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) |
517 | { |
518 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
519 | struct ieee80211_local *local = sdata->local; |
520 | |
521 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
522 | ieee80211_mesh_root_setup(ifmsh); |
523 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
524 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
525 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
526 | BSS_CHANGED_BEACON_ENABLED | |
527 | BSS_CHANGED_BEACON_INT); |
528 | } |
529 | |
530 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) |
531 | { |
532 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
533 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
534 | /* |
535 | * If the timer fired while we waited for it, it will have |
536 | * requeued the work. Now the work will be running again |
537 | * but will not rearm the timer again because it checks |
538 | * whether the interface is running, which, at this point, |
539 | * it no longer is. |
540 | */ |
541 | cancel_work_sync(&sdata->u.mesh.work); |
542 | |
543 | /* |
544 | * When we get here, the interface is marked down. |
545 | * Call synchronize_rcu() to wait for the RX path |
546 | * should it be using the interface and enqueuing |
547 | * frames at this very time on another CPU. |
548 | */ |
549 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
550 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
551 | } |
552 | |
553 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |
554 | u16 stype, |
555 | struct ieee80211_mgmt *mgmt, |
556 | size_t len, |
557 | struct ieee80211_rx_status *rx_status) |
558 | { |
559 | struct ieee80211_local *local = sdata->local; |
560 | struct ieee802_11_elems elems; |
561 | struct ieee80211_channel *channel; |
562 | u32 supp_rates = 0; |
563 | size_t baselen; |
564 | int freq; |
565 | enum ieee80211_band band = rx_status->band; |
566 | |
567 | /* ignore ProbeResp to foreign address */ |
568 | if (stype == IEEE80211_STYPE_PROBE_RESP && |
569 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
570 | return; |
571 | |
572 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
573 | if (baselen > len) |
574 | return; |
575 | |
576 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
577 | &elems); |
578 | |
579 | if (elems.ds_params && elems.ds_params_len == 1) |
580 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); |
581 | else |
582 | freq = rx_status->freq; |
583 | |
584 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
585 | |
586 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
587 | return; |
588 | |
589 | if (elems.mesh_id && elems.mesh_config && |
590 | mesh_matches_local(&elems, sdata)) { |
591 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); |
592 | |
593 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, |
594 | mesh_peer_accepts_plinks(&elems)); |
595 | } |
596 | } |
597 | |
598 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, |
599 | struct ieee80211_mgmt *mgmt, |
600 | size_t len, |
601 | struct ieee80211_rx_status *rx_status) |
602 | { |
603 | switch (mgmt->u.action.category) { |
604 | case MESH_PLINK_CATEGORY: |
605 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
606 | break; |
607 | case MESH_PATH_SEL_CATEGORY: |
608 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
609 | break; |
610 | } |
611 | } |
612 | |
613 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
614 | struct sk_buff *skb) |
615 | { |
616 | struct ieee80211_rx_status *rx_status; |
617 | struct ieee80211_if_mesh *ifmsh; |
618 | struct ieee80211_mgmt *mgmt; |
619 | u16 stype; |
620 | |
621 | ifmsh = &sdata->u.mesh; |
622 | |
623 | rx_status = IEEE80211_SKB_RXCB(skb); |
624 | mgmt = (struct ieee80211_mgmt *) skb->data; |
625 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; |
626 | |
627 | switch (stype) { |
628 | case IEEE80211_STYPE_PROBE_RESP: |
629 | case IEEE80211_STYPE_BEACON: |
630 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, |
631 | rx_status); |
632 | break; |
633 | case IEEE80211_STYPE_ACTION: |
634 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); |
635 | break; |
636 | } |
637 | |
638 | kfree_skb(skb); |
639 | } |
640 | |
641 | static void ieee80211_mesh_work(struct work_struct *work) |
642 | { |
643 | struct ieee80211_sub_if_data *sdata = |
644 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); |
645 | struct ieee80211_local *local = sdata->local; |
646 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
647 | struct sk_buff *skb; |
648 | |
649 | if (!ieee80211_sdata_running(sdata)) |
650 | return; |
651 | |
652 | if (local->scanning) |
653 | return; |
654 | |
655 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) |
656 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); |
657 | |
658 | if (ifmsh->preq_queue_len && |
659 | time_after(jiffies, |
660 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) |
661 | mesh_path_start_discovery(sdata); |
662 | |
663 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
664 | mesh_mpath_table_grow(); |
665 | |
666 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
667 | mesh_mpp_table_grow(); |
668 | |
669 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) |
670 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
671 | |
672 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) |
673 | ieee80211_mesh_rootpath(sdata); |
674 | } |
675 | |
676 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) |
677 | { |
678 | struct ieee80211_sub_if_data *sdata; |
679 | |
680 | rcu_read_lock(); |
681 | list_for_each_entry_rcu(sdata, &local->interfaces, list) |
682 | if (ieee80211_vif_is_mesh(&sdata->vif)) |
683 | ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); |
684 | rcu_read_unlock(); |
685 | } |
686 | |
687 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
688 | { |
689 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
690 | |
691 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); |
692 | setup_timer(&ifmsh->housekeeping_timer, |
693 | ieee80211_mesh_housekeeping_timer, |
694 | (unsigned long) sdata); |
695 | skb_queue_head_init(&sdata->u.mesh.skb_queue); |
696 | |
697 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; |
698 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; |
699 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; |
700 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; |
701 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; |
702 | ifmsh->mshcfg.auto_open_plinks = true; |
703 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = |
704 | MESH_MAX_ESTAB_PLINKS; |
705 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
706 | MESH_PATH_TIMEOUT; |
707 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
708 | MESH_PREQ_MIN_INT; |
709 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
710 | MESH_DIAM_TRAVERSAL_TIME; |
711 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
712 | MESH_MAX_PREQ_RETRIES; |
713 | ifmsh->mshcfg.path_refresh_time = |
714 | MESH_PATH_REFRESH_TIME; |
715 | ifmsh->mshcfg.min_discovery_timeout = |
716 | MESH_MIN_DISCOVERY_TIMEOUT; |
717 | ifmsh->accepting_plinks = true; |
718 | ifmsh->preq_id = 0; |
719 | ifmsh->sn = 0; |
720 | atomic_set(&ifmsh->mpaths, 0); |
721 | mesh_rmc_init(sdata); |
722 | ifmsh->last_preq = jiffies; |
723 | /* Allocate all mesh structures when creating the first mesh interface. */ |
724 | if (!mesh_allocated) |
725 | ieee80211s_init(); |
726 | mesh_ids_set_default(ifmsh); |
727 | setup_timer(&ifmsh->mesh_path_timer, |
728 | ieee80211_mesh_path_timer, |
729 | (unsigned long) sdata); |
730 | setup_timer(&ifmsh->mesh_path_root_timer, |
731 | ieee80211_mesh_path_root_timer, |
732 | (unsigned long) sdata); |
733 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
734 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); |
735 | } |
736 | |
737 | ieee80211_rx_result |
738 | ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
739 | { |
740 | struct ieee80211_local *local = sdata->local; |
741 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
742 | struct ieee80211_mgmt *mgmt; |
743 | u16 fc; |
744 | |
745 | if (skb->len < 24) |
746 | return RX_DROP_MONITOR; |
747 | |
748 | mgmt = (struct ieee80211_mgmt *) skb->data; |
749 | fc = le16_to_cpu(mgmt->frame_control); |
750 | |
751 | switch (fc & IEEE80211_FCTL_STYPE) { |
752 | case IEEE80211_STYPE_ACTION: |
753 | case IEEE80211_STYPE_PROBE_RESP: |
754 | case IEEE80211_STYPE_BEACON: |
755 | skb_queue_tail(&ifmsh->skb_queue, skb); |
756 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
757 | return RX_QUEUED; |
758 | } |
759 | |
760 | return RX_CONTINUE; |
761 | } |
762 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9