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Commit | Line | Data |
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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 | ||
472dbc45 JB |
16 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
17 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) | |
e304bfd3 | 18 | #define IEEE80211_MESH_RANN_INTERVAL (1 * HZ) |
472dbc45 | 19 | |
3491707a RP |
20 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 |
21 | #define MESHCONF_CAPAB_FORWARDING 0x08 | |
2e3c8736 | 22 | |
5bb644a0 JB |
23 | #define TMR_RUNNING_HK 0 |
24 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 25 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 26 | |
2e3c8736 LCC |
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 | ||
472dbc45 JB |
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 | ||
6b9ac442 | 50 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
51 | |
52 | if (local->quiescing) { | |
53 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
54 | return; | |
55 | } | |
56 | ||
c03e20fc | 57 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
58 | } |
59 | ||
2e3c8736 LCC |
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 | |
f698d856 | 64 | * @sdata: local mesh subif |
2e3c8736 LCC |
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 | */ | |
f698d856 | 69 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 70 | { |
472dbc45 | 71 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2e3c8736 | 72 | |
2e3c8736 LCC |
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 | */ | |
472dbc45 JB |
83 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
84 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
136cfa28 RP |
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)) | |
2e3c8736 LCC |
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 | |
2e3c8736 | 99 | */ |
f698d856 | 100 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 101 | { |
136cfa28 | 102 | return (ie->mesh_config->meshconf_cap & |
3491707a | 103 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
104 | } |
105 | ||
106 | /** | |
107 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
108 | * | |
d0709a65 | 109 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 110 | */ |
d0709a65 | 111 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 112 | { |
2e3c8736 LCC |
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 | |
b4e08ea1 LCC |
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 | |
2e3c8736 LCC |
120 | */ |
121 | free_plinks = mesh_plink_availables(sdata); | |
122 | ||
472dbc45 JB |
123 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
124 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
125 | } |
126 | ||
472dbc45 | 127 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
2e3c8736 | 128 | { |
3491707a RP |
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 */ | |
2e3c8736 LCC |
134 | } |
135 | ||
f698d856 | 136 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 137 | { |
2e3c8736 LCC |
138 | int i; |
139 | ||
472dbc45 JB |
140 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
141 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 142 | return -ENOMEM; |
472dbc45 | 143 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 144 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 145 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
146 | return 0; |
147 | } | |
148 | ||
f698d856 | 149 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 150 | { |
472dbc45 | 151 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
152 | struct rmc_entry *p, *n; |
153 | int i; | |
154 | ||
472dbc45 | 155 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
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); | |
472dbc45 | 165 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
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, | |
f698d856 | 181 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 182 | { |
472dbc45 | 183 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
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 */ | |
51ceddad LCC |
190 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
191 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
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; | |
f64f9e71 JP |
199 | } else if ((seqnum == p->seqnum) && |
200 | (memcmp(sa, p->sa, ETH_ALEN) == 0)) | |
2e3c8736 LCC |
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 | ||
f698d856 | 216 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 217 | { |
f698d856 | 218 | struct ieee80211_local *local = sdata->local; |
2e3c8736 LCC |
219 | struct ieee80211_supported_band *sband; |
220 | u8 *pos; | |
221 | int len, i, rate; | |
8f2fda95 | 222 | u8 neighbors; |
2e3c8736 LCC |
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 | ||
be125c60 RP |
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 | ||
472dbc45 | 253 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
2e3c8736 | 254 | *pos++ = WLAN_EID_MESH_ID; |
472dbc45 JB |
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); | |
2e3c8736 | 258 | |
136cfa28 | 259 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie)); |
2e3c8736 | 260 | *pos++ = WLAN_EID_MESH_CONFIG; |
136cfa28 | 261 | *pos++ = sizeof(struct ieee80211_meshconf_ie); |
2e3c8736 LCC |
262 | |
263 | /* Active path selection protocol ID */ | |
3491707a | 264 | *pos++ = sdata->u.mesh.mesh_pp_id; |
2e3c8736 LCC |
265 | |
266 | /* Active path selection metric ID */ | |
3491707a | 267 | *pos++ = sdata->u.mesh.mesh_pm_id; |
2e3c8736 LCC |
268 | |
269 | /* Congestion control mode identifier */ | |
3491707a | 270 | *pos++ = sdata->u.mesh.mesh_cc_id; |
2e3c8736 | 271 | |
9e03fdfd | 272 | /* Synchronization protocol identifier */ |
3491707a | 273 | *pos++ = sdata->u.mesh.mesh_sp_id; |
2e3c8736 | 274 | |
9e03fdfd | 275 | /* Authentication Protocol identifier */ |
3491707a | 276 | *pos++ = sdata->u.mesh.mesh_auth_id; |
9e03fdfd | 277 | |
8f2fda95 RP |
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; | |
9e03fdfd | 283 | |
2e3c8736 | 284 | /* Mesh capability */ |
472dbc45 | 285 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
3491707a RP |
286 | *pos = MESHCONF_CAPAB_FORWARDING; |
287 | *pos++ |= sdata->u.mesh.accepting_plinks ? | |
288 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; | |
2e3c8736 | 289 | *pos++ = 0x00; |
2e3c8736 LCC |
290 | } |
291 | ||
f698d856 | 292 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
2e3c8736 LCC |
293 | { |
294 | /* Use last four bytes of hw addr and interface index as hash index */ | |
f698d856 | 295 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
2e3c8736 LCC |
296 | & tbl->hash_mask; |
297 | } | |
298 | ||
2e3c8736 LCC |
299 | struct mesh_table *mesh_table_alloc(int size_order) |
300 | { | |
301 | int i; | |
302 | struct mesh_table *newtbl; | |
303 | ||
304 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); | |
305 | if (!newtbl) | |
306 | return NULL; | |
307 | ||
308 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * | |
309 | (1 << size_order), GFP_KERNEL); | |
310 | ||
311 | if (!newtbl->hash_buckets) { | |
312 | kfree(newtbl); | |
313 | return NULL; | |
314 | } | |
315 | ||
316 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * | |
317 | (1 << size_order), GFP_KERNEL); | |
318 | if (!newtbl->hashwlock) { | |
319 | kfree(newtbl->hash_buckets); | |
320 | kfree(newtbl); | |
321 | return NULL; | |
322 | } | |
323 | ||
324 | newtbl->size_order = size_order; | |
325 | newtbl->hash_mask = (1 << size_order) - 1; | |
326 | atomic_set(&newtbl->entries, 0); | |
327 | get_random_bytes(&newtbl->hash_rnd, | |
328 | sizeof(newtbl->hash_rnd)); | |
329 | for (i = 0; i <= newtbl->hash_mask; i++) | |
330 | spin_lock_init(&newtbl->hashwlock[i]); | |
331 | ||
332 | return newtbl; | |
333 | } | |
334 | ||
2e3c8736 LCC |
335 | |
336 | static void ieee80211_mesh_path_timer(unsigned long data) | |
337 | { | |
338 | struct ieee80211_sub_if_data *sdata = | |
339 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 340 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 341 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 342 | |
5bb644a0 JB |
343 | if (local->quiescing) { |
344 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
345 | return; | |
346 | } | |
347 | ||
c03e20fc | 348 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
2e3c8736 LCC |
349 | } |
350 | ||
e304bfd3 RP |
351 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
352 | { | |
353 | struct ieee80211_sub_if_data *sdata = | |
354 | (struct ieee80211_sub_if_data *) data; | |
355 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
356 | struct ieee80211_local *local = sdata->local; | |
357 | ||
358 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
359 | ||
360 | if (local->quiescing) { | |
361 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
362 | return; | |
363 | } | |
364 | ||
365 | ieee80211_queue_work(&local->hw, &ifmsh->work); | |
366 | } | |
367 | ||
63c5723b RP |
368 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
369 | { | |
370 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
371 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
372 | else { | |
373 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
374 | /* stop running timer */ | |
375 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
376 | } | |
377 | } | |
378 | ||
3c5772a5 JC |
379 | /** |
380 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
381 | * @hdr: 802.11 frame header | |
382 | * @fc: frame control field | |
383 | * @meshda: destination address in the mesh | |
384 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
385 | * locally originated. | |
386 | * | |
387 | * Return the length of the 802.11 (does not include a mesh control header) | |
388 | */ | |
15ff6365 JB |
389 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
390 | const u8 *meshda, const u8 *meshsa) | |
391 | { | |
3c5772a5 JC |
392 | if (is_multicast_ether_addr(meshda)) { |
393 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
394 | /* DA TA SA */ | |
395 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
396 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
397 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
398 | return 24; | |
399 | } else { | |
400 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
401 | IEEE80211_FCTL_TODS); | |
402 | /* RA TA DA SA */ | |
403 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
404 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
405 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
406 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
407 | return 30; | |
408 | } | |
409 | } | |
410 | ||
902acc78 JB |
411 | /** |
412 | * ieee80211_new_mesh_header - create a new mesh header | |
413 | * @meshhdr: uninitialized mesh header | |
414 | * @sdata: mesh interface to be used | |
3c5772a5 JC |
415 | * @addr4: addr4 of the mesh frame (1st in ae header) |
416 | * may be NULL | |
417 | * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) | |
418 | * may be NULL unless addr6 is present | |
419 | * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) | |
420 | * may be NULL unless addr5 is present | |
902acc78 JB |
421 | * |
422 | * Return the header length. | |
423 | */ | |
424 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
3c5772a5 JC |
425 | struct ieee80211_sub_if_data *sdata, char *addr4, |
426 | char *addr5, char *addr6) | |
902acc78 | 427 | { |
3c5772a5 | 428 | int aelen = 0; |
0c3cee72 | 429 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
430 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
431 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
432 | sdata->u.mesh.mesh_seqnum++; | |
3c5772a5 JC |
433 | if (addr4) { |
434 | meshhdr->flags |= MESH_FLAGS_AE_A4; | |
435 | aelen += ETH_ALEN; | |
436 | memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); | |
437 | } | |
438 | if (addr5 && addr6) { | |
439 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; | |
440 | aelen += 2 * ETH_ALEN; | |
441 | if (!addr4) { | |
442 | memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); | |
443 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
444 | } else { | |
445 | memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); | |
446 | memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); | |
447 | } | |
448 | } | |
449 | return 6 + aelen; | |
902acc78 JB |
450 | } |
451 | ||
472dbc45 JB |
452 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
453 | struct ieee80211_if_mesh *ifmsh) | |
454 | { | |
455 | bool free_plinks; | |
456 | ||
457 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
458 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
47846c9b | 459 | sdata->name); |
472dbc45 JB |
460 | #endif |
461 | ||
462 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
463 | mesh_path_expire(sdata); | |
464 | ||
465 | free_plinks = mesh_plink_availables(sdata); | |
466 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 467 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 468 | |
472dbc45 JB |
469 | mod_timer(&ifmsh->housekeeping_timer, |
470 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
471 | } | |
472 | ||
e304bfd3 RP |
473 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
474 | { | |
475 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
476 | ||
477 | mesh_path_tx_root_frame(sdata); | |
478 | mod_timer(&ifmsh->mesh_path_root_timer, | |
479 | round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); | |
480 | } | |
481 | ||
5bb644a0 JB |
482 | #ifdef CONFIG_PM |
483 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
484 | { | |
485 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
486 | ||
487 | /* might restart the timer but that doesn't matter */ | |
488 | cancel_work_sync(&ifmsh->work); | |
489 | ||
490 | /* use atomic bitops in case both timers fire at the same time */ | |
491 | ||
492 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
493 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
494 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
495 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
496 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
497 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
498 | } |
499 | ||
500 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
501 | { | |
502 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
503 | ||
504 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
505 | add_timer(&ifmsh->housekeeping_timer); | |
506 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
507 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
508 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
509 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 510 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
511 | } |
512 | #endif | |
472dbc45 JB |
513 | |
514 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
515 | { | |
516 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
517 | struct ieee80211_local *local = sdata->local; | |
518 | ||
6b9ac442 | 519 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 520 | ieee80211_mesh_root_setup(ifmsh); |
18889231 | 521 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
5b365834 | 522 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 523 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
524 | BSS_CHANGED_BEACON_ENABLED | |
525 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
526 | } |
527 | ||
528 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
529 | { | |
530 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); | |
e304bfd3 | 531 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
532 | /* |
533 | * If the timer fired while we waited for it, it will have | |
534 | * requeued the work. Now the work will be running again | |
535 | * but will not rearm the timer again because it checks | |
536 | * whether the interface is running, which, at this point, | |
537 | * it no longer is. | |
538 | */ | |
539 | cancel_work_sync(&sdata->u.mesh.work); | |
540 | ||
472dbc45 JB |
541 | /* |
542 | * When we get here, the interface is marked down. | |
543 | * Call synchronize_rcu() to wait for the RX path | |
544 | * should it be using the interface and enqueuing | |
545 | * frames at this very time on another CPU. | |
546 | */ | |
4a27096b | 547 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
472dbc45 JB |
548 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
549 | } | |
550 | ||
551 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
552 | u16 stype, | |
553 | struct ieee80211_mgmt *mgmt, | |
554 | size_t len, | |
555 | struct ieee80211_rx_status *rx_status) | |
556 | { | |
c6a1fa12 | 557 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
558 | struct ieee802_11_elems elems; |
559 | struct ieee80211_channel *channel; | |
881d948c | 560 | u32 supp_rates = 0; |
472dbc45 JB |
561 | size_t baselen; |
562 | int freq; | |
563 | enum ieee80211_band band = rx_status->band; | |
564 | ||
565 | /* ignore ProbeResp to foreign address */ | |
566 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
47846c9b | 567 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
568 | return; |
569 | ||
570 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
571 | if (baselen > len) | |
572 | return; | |
573 | ||
574 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
575 | &elems); | |
576 | ||
577 | if (elems.ds_params && elems.ds_params_len == 1) | |
578 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); | |
579 | else | |
580 | freq = rx_status->freq; | |
581 | ||
582 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
583 | ||
584 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
585 | return; | |
586 | ||
587 | if (elems.mesh_id && elems.mesh_config && | |
588 | mesh_matches_local(&elems, sdata)) { | |
589 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
590 | ||
591 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, | |
592 | mesh_peer_accepts_plinks(&elems)); | |
593 | } | |
594 | } | |
595 | ||
596 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
597 | struct ieee80211_mgmt *mgmt, | |
598 | size_t len, | |
599 | struct ieee80211_rx_status *rx_status) | |
600 | { | |
601 | switch (mgmt->u.action.category) { | |
97ad9139 | 602 | case WLAN_CATEGORY_MESH_PLINK: |
472dbc45 JB |
603 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
604 | break; | |
97ad9139 | 605 | case WLAN_CATEGORY_MESH_PATH_SEL: |
472dbc45 JB |
606 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
607 | break; | |
608 | } | |
609 | } | |
610 | ||
611 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
612 | struct sk_buff *skb) | |
613 | { | |
614 | struct ieee80211_rx_status *rx_status; | |
615 | struct ieee80211_if_mesh *ifmsh; | |
616 | struct ieee80211_mgmt *mgmt; | |
617 | u16 stype; | |
618 | ||
619 | ifmsh = &sdata->u.mesh; | |
620 | ||
f1d58c25 | 621 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
622 | mgmt = (struct ieee80211_mgmt *) skb->data; |
623 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
624 | ||
625 | switch (stype) { | |
626 | case IEEE80211_STYPE_PROBE_RESP: | |
627 | case IEEE80211_STYPE_BEACON: | |
628 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
629 | rx_status); | |
630 | break; | |
631 | case IEEE80211_STYPE_ACTION: | |
632 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
633 | break; | |
634 | } | |
635 | ||
636 | kfree_skb(skb); | |
637 | } | |
638 | ||
639 | static void ieee80211_mesh_work(struct work_struct *work) | |
640 | { | |
641 | struct ieee80211_sub_if_data *sdata = | |
642 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); | |
643 | struct ieee80211_local *local = sdata->local; | |
644 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
645 | struct sk_buff *skb; | |
646 | ||
9607e6b6 | 647 | if (!ieee80211_sdata_running(sdata)) |
472dbc45 JB |
648 | return; |
649 | ||
fbe9c429 | 650 | if (local->scanning) |
472dbc45 JB |
651 | return; |
652 | ||
653 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) | |
654 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
655 | ||
656 | if (ifmsh->preq_queue_len && | |
657 | time_after(jiffies, | |
658 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
659 | mesh_path_start_discovery(sdata); | |
660 | ||
18889231 JC |
661 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
662 | mesh_mpath_table_grow(); | |
663 | ||
664 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) | |
665 | mesh_mpp_table_grow(); | |
666 | ||
667 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 668 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
669 | |
670 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
671 | ieee80211_mesh_rootpath(sdata); | |
472dbc45 JB |
672 | } |
673 | ||
674 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
675 | { | |
676 | struct ieee80211_sub_if_data *sdata; | |
677 | ||
678 | rcu_read_lock(); | |
679 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
680 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c03e20fc | 681 | ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); |
472dbc45 JB |
682 | rcu_read_unlock(); |
683 | } | |
684 | ||
902acc78 JB |
685 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
686 | { | |
472dbc45 JB |
687 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
688 | ||
689 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); | |
690 | setup_timer(&ifmsh->housekeeping_timer, | |
691 | ieee80211_mesh_housekeeping_timer, | |
692 | (unsigned long) sdata); | |
693 | skb_queue_head_init(&sdata->u.mesh.skb_queue); | |
694 | ||
695 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; | |
696 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; | |
697 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; | |
698 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; | |
699 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; | |
700 | ifmsh->mshcfg.auto_open_plinks = true; | |
701 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = | |
902acc78 | 702 | MESH_MAX_ESTAB_PLINKS; |
472dbc45 | 703 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
902acc78 | 704 | MESH_PATH_TIMEOUT; |
472dbc45 | 705 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
902acc78 | 706 | MESH_PREQ_MIN_INT; |
472dbc45 | 707 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
902acc78 | 708 | MESH_DIAM_TRAVERSAL_TIME; |
472dbc45 | 709 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
902acc78 | 710 | MESH_MAX_PREQ_RETRIES; |
472dbc45 | 711 | ifmsh->mshcfg.path_refresh_time = |
902acc78 | 712 | MESH_PATH_REFRESH_TIME; |
472dbc45 | 713 | ifmsh->mshcfg.min_discovery_timeout = |
902acc78 | 714 | MESH_MIN_DISCOVERY_TIMEOUT; |
472dbc45 JB |
715 | ifmsh->accepting_plinks = true; |
716 | ifmsh->preq_id = 0; | |
d19b3bf6 | 717 | ifmsh->sn = 0; |
472dbc45 | 718 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 719 | mesh_rmc_init(sdata); |
472dbc45 | 720 | ifmsh->last_preq = jiffies; |
902acc78 JB |
721 | /* Allocate all mesh structures when creating the first mesh interface. */ |
722 | if (!mesh_allocated) | |
723 | ieee80211s_init(); | |
472dbc45 JB |
724 | mesh_ids_set_default(ifmsh); |
725 | setup_timer(&ifmsh->mesh_path_timer, | |
902acc78 JB |
726 | ieee80211_mesh_path_timer, |
727 | (unsigned long) sdata); | |
e304bfd3 RP |
728 | setup_timer(&ifmsh->mesh_path_root_timer, |
729 | ieee80211_mesh_path_root_timer, | |
730 | (unsigned long) sdata); | |
472dbc45 JB |
731 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
732 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
733 | } | |
734 | ||
735 | ieee80211_rx_result | |
f1d58c25 | 736 | ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
472dbc45 JB |
737 | { |
738 | struct ieee80211_local *local = sdata->local; | |
739 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
740 | struct ieee80211_mgmt *mgmt; | |
741 | u16 fc; | |
742 | ||
743 | if (skb->len < 24) | |
744 | return RX_DROP_MONITOR; | |
745 | ||
746 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
747 | fc = le16_to_cpu(mgmt->frame_control); | |
748 | ||
749 | switch (fc & IEEE80211_FCTL_STYPE) { | |
a43816df | 750 | case IEEE80211_STYPE_ACTION: |
472dbc45 JB |
751 | case IEEE80211_STYPE_PROBE_RESP: |
752 | case IEEE80211_STYPE_BEACON: | |
472dbc45 | 753 | skb_queue_tail(&ifmsh->skb_queue, skb); |
c03e20fc | 754 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
755 | return RX_QUEUED; |
756 | } | |
757 | ||
758 | return RX_CONTINUE; | |
902acc78 | 759 | } |