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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 | ||
64592c8f | 57 | ieee80211_queue_work(&local->hw, &sdata->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 | ||
f698d856 | 127 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 128 | { |
2e3c8736 LCC |
129 | int i; |
130 | ||
472dbc45 JB |
131 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
132 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 133 | return -ENOMEM; |
472dbc45 | 134 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 135 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 136 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
137 | return 0; |
138 | } | |
139 | ||
f698d856 | 140 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 141 | { |
472dbc45 | 142 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
143 | struct rmc_entry *p, *n; |
144 | int i; | |
145 | ||
472dbc45 | 146 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
147 | return; |
148 | ||
149 | for (i = 0; i < RMC_BUCKETS; i++) | |
150 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
151 | list_del(&p->list); | |
152 | kmem_cache_free(rm_cache, p); | |
153 | } | |
154 | ||
155 | kfree(rmc); | |
472dbc45 | 156 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
157 | } |
158 | ||
159 | /** | |
160 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
161 | * | |
162 | * @sa: source address | |
163 | * @mesh_hdr: mesh_header | |
164 | * | |
165 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
166 | * | |
167 | * Checks using the source address and the mesh sequence number if we have | |
168 | * received this frame lately. If the frame is not in the cache, it is added to | |
169 | * it. | |
170 | */ | |
171 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 172 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 173 | { |
472dbc45 | 174 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
175 | u32 seqnum = 0; |
176 | int entries = 0; | |
177 | u8 idx; | |
178 | struct rmc_entry *p, *n; | |
179 | ||
180 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
181 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
182 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
183 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
184 | ++entries; | |
185 | if (time_after(jiffies, p->exp_time) || | |
186 | (entries == RMC_QUEUE_MAX_LEN)) { | |
187 | list_del(&p->list); | |
188 | kmem_cache_free(rm_cache, p); | |
189 | --entries; | |
f64f9e71 JP |
190 | } else if ((seqnum == p->seqnum) && |
191 | (memcmp(sa, p->sa, ETH_ALEN) == 0)) | |
2e3c8736 LCC |
192 | return -1; |
193 | } | |
194 | ||
195 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
196 | if (!p) { | |
197 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); | |
198 | return 0; | |
199 | } | |
200 | p->seqnum = seqnum; | |
201 | p->exp_time = jiffies + RMC_TIMEOUT; | |
202 | memcpy(p->sa, sa, ETH_ALEN); | |
203 | list_add(&p->list, &rmc->bucket[idx].list); | |
204 | return 0; | |
205 | } | |
206 | ||
f698d856 | 207 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 208 | { |
f698d856 | 209 | struct ieee80211_local *local = sdata->local; |
2e3c8736 LCC |
210 | struct ieee80211_supported_band *sband; |
211 | u8 *pos; | |
212 | int len, i, rate; | |
8f2fda95 | 213 | u8 neighbors; |
2e3c8736 LCC |
214 | |
215 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
216 | len = sband->n_bitrates; | |
217 | if (len > 8) | |
218 | len = 8; | |
219 | pos = skb_put(skb, len + 2); | |
220 | *pos++ = WLAN_EID_SUPP_RATES; | |
221 | *pos++ = len; | |
222 | for (i = 0; i < len; i++) { | |
223 | rate = sband->bitrates[i].bitrate; | |
224 | *pos++ = (u8) (rate / 5); | |
225 | } | |
226 | ||
227 | if (sband->n_bitrates > len) { | |
228 | pos = skb_put(skb, sband->n_bitrates - len + 2); | |
229 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
230 | *pos++ = sband->n_bitrates - len; | |
231 | for (i = len; i < sband->n_bitrates; i++) { | |
232 | rate = sband->bitrates[i].bitrate; | |
233 | *pos++ = (u8) (rate / 5); | |
234 | } | |
235 | } | |
236 | ||
be125c60 RP |
237 | if (sband->band == IEEE80211_BAND_2GHZ) { |
238 | pos = skb_put(skb, 2 + 1); | |
239 | *pos++ = WLAN_EID_DS_PARAMS; | |
240 | *pos++ = 1; | |
241 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); | |
242 | } | |
243 | ||
472dbc45 | 244 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
2e3c8736 | 245 | *pos++ = WLAN_EID_MESH_ID; |
472dbc45 JB |
246 | *pos++ = sdata->u.mesh.mesh_id_len; |
247 | if (sdata->u.mesh.mesh_id_len) | |
248 | memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); | |
2e3c8736 | 249 | |
136cfa28 | 250 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_meshconf_ie)); |
2e3c8736 | 251 | *pos++ = WLAN_EID_MESH_CONFIG; |
136cfa28 | 252 | *pos++ = sizeof(struct ieee80211_meshconf_ie); |
2e3c8736 LCC |
253 | |
254 | /* Active path selection protocol ID */ | |
3491707a | 255 | *pos++ = sdata->u.mesh.mesh_pp_id; |
2e3c8736 LCC |
256 | |
257 | /* Active path selection metric ID */ | |
3491707a | 258 | *pos++ = sdata->u.mesh.mesh_pm_id; |
2e3c8736 LCC |
259 | |
260 | /* Congestion control mode identifier */ | |
3491707a | 261 | *pos++ = sdata->u.mesh.mesh_cc_id; |
2e3c8736 | 262 | |
9e03fdfd | 263 | /* Synchronization protocol identifier */ |
3491707a | 264 | *pos++ = sdata->u.mesh.mesh_sp_id; |
2e3c8736 | 265 | |
9e03fdfd | 266 | /* Authentication Protocol identifier */ |
3491707a | 267 | *pos++ = sdata->u.mesh.mesh_auth_id; |
9e03fdfd | 268 | |
8f2fda95 RP |
269 | /* Mesh Formation Info - number of neighbors */ |
270 | neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks); | |
271 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
272 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
273 | *pos++ = neighbors << 1; | |
9e03fdfd | 274 | |
2e3c8736 | 275 | /* Mesh capability */ |
472dbc45 | 276 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
3491707a RP |
277 | *pos = MESHCONF_CAPAB_FORWARDING; |
278 | *pos++ |= sdata->u.mesh.accepting_plinks ? | |
279 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; | |
2e3c8736 | 280 | *pos++ = 0x00; |
c80d545d | 281 | |
581a8b0f JC |
282 | if (sdata->u.mesh.ie) { |
283 | int len = sdata->u.mesh.ie_len; | |
284 | const u8 *data = sdata->u.mesh.ie; | |
c80d545d JC |
285 | if (skb_tailroom(skb) > len) |
286 | memcpy(skb_put(skb, len), data, len); | |
287 | } | |
2e3c8736 LCC |
288 | } |
289 | ||
f698d856 | 290 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
2e3c8736 LCC |
291 | { |
292 | /* Use last four bytes of hw addr and interface index as hash index */ | |
f698d856 | 293 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
2e3c8736 LCC |
294 | & tbl->hash_mask; |
295 | } | |
296 | ||
2e3c8736 LCC |
297 | struct mesh_table *mesh_table_alloc(int size_order) |
298 | { | |
299 | int i; | |
300 | struct mesh_table *newtbl; | |
301 | ||
302 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); | |
303 | if (!newtbl) | |
304 | return NULL; | |
305 | ||
306 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * | |
307 | (1 << size_order), GFP_KERNEL); | |
308 | ||
309 | if (!newtbl->hash_buckets) { | |
310 | kfree(newtbl); | |
311 | return NULL; | |
312 | } | |
313 | ||
314 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * | |
315 | (1 << size_order), GFP_KERNEL); | |
316 | if (!newtbl->hashwlock) { | |
317 | kfree(newtbl->hash_buckets); | |
318 | kfree(newtbl); | |
319 | return NULL; | |
320 | } | |
321 | ||
322 | newtbl->size_order = size_order; | |
323 | newtbl->hash_mask = (1 << size_order) - 1; | |
324 | atomic_set(&newtbl->entries, 0); | |
325 | get_random_bytes(&newtbl->hash_rnd, | |
326 | sizeof(newtbl->hash_rnd)); | |
327 | for (i = 0; i <= newtbl->hash_mask; i++) | |
328 | spin_lock_init(&newtbl->hashwlock[i]); | |
329 | ||
330 | return newtbl; | |
331 | } | |
332 | ||
2e3c8736 LCC |
333 | |
334 | static void ieee80211_mesh_path_timer(unsigned long data) | |
335 | { | |
336 | struct ieee80211_sub_if_data *sdata = | |
337 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 338 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 339 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 340 | |
5bb644a0 JB |
341 | if (local->quiescing) { |
342 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
343 | return; | |
344 | } | |
345 | ||
64592c8f | 346 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
347 | } |
348 | ||
e304bfd3 RP |
349 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
350 | { | |
351 | struct ieee80211_sub_if_data *sdata = | |
352 | (struct ieee80211_sub_if_data *) data; | |
353 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
354 | struct ieee80211_local *local = sdata->local; | |
355 | ||
356 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
357 | ||
358 | if (local->quiescing) { | |
359 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
360 | return; | |
361 | } | |
362 | ||
64592c8f | 363 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
364 | } |
365 | ||
63c5723b RP |
366 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
367 | { | |
368 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
369 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
370 | else { | |
371 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
372 | /* stop running timer */ | |
373 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
374 | } | |
375 | } | |
376 | ||
3c5772a5 JC |
377 | /** |
378 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
379 | * @hdr: 802.11 frame header | |
380 | * @fc: frame control field | |
381 | * @meshda: destination address in the mesh | |
382 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
383 | * locally originated. | |
384 | * | |
385 | * Return the length of the 802.11 (does not include a mesh control header) | |
386 | */ | |
15ff6365 JB |
387 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
388 | const u8 *meshda, const u8 *meshsa) | |
389 | { | |
3c5772a5 JC |
390 | if (is_multicast_ether_addr(meshda)) { |
391 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
392 | /* DA TA SA */ | |
393 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
394 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
395 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
396 | return 24; | |
397 | } else { | |
398 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
399 | IEEE80211_FCTL_TODS); | |
400 | /* RA TA DA SA */ | |
401 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
402 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
403 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
404 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
405 | return 30; | |
406 | } | |
407 | } | |
408 | ||
902acc78 JB |
409 | /** |
410 | * ieee80211_new_mesh_header - create a new mesh header | |
411 | * @meshhdr: uninitialized mesh header | |
412 | * @sdata: mesh interface to be used | |
61ad5394 JC |
413 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
414 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
415 | * be NULL. | |
416 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
417 | * mesh frame | |
902acc78 JB |
418 | * |
419 | * Return the header length. | |
420 | */ | |
421 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
422 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
423 | char *addr6) | |
902acc78 | 424 | { |
3c5772a5 | 425 | int aelen = 0; |
61ad5394 | 426 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 427 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
428 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
429 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
430 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 431 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
432 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
433 | aelen += ETH_ALEN; | |
61ad5394 JC |
434 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
435 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
436 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
437 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
438 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
439 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
440 | } |
441 | return 6 + aelen; | |
902acc78 JB |
442 | } |
443 | ||
472dbc45 JB |
444 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
445 | struct ieee80211_if_mesh *ifmsh) | |
446 | { | |
447 | bool free_plinks; | |
448 | ||
449 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
450 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
47846c9b | 451 | sdata->name); |
472dbc45 JB |
452 | #endif |
453 | ||
454 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
455 | mesh_path_expire(sdata); | |
456 | ||
457 | free_plinks = mesh_plink_availables(sdata); | |
458 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 459 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 460 | |
472dbc45 JB |
461 | mod_timer(&ifmsh->housekeeping_timer, |
462 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
463 | } | |
464 | ||
e304bfd3 RP |
465 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
466 | { | |
467 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
468 | ||
469 | mesh_path_tx_root_frame(sdata); | |
470 | mod_timer(&ifmsh->mesh_path_root_timer, | |
471 | round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); | |
472 | } | |
473 | ||
5bb644a0 JB |
474 | #ifdef CONFIG_PM |
475 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
476 | { | |
477 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
478 | ||
5bb644a0 JB |
479 | /* use atomic bitops in case both timers fire at the same time */ |
480 | ||
481 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
482 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
483 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
484 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
485 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
486 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
487 | } |
488 | ||
489 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
490 | { | |
491 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
492 | ||
493 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
494 | add_timer(&ifmsh->housekeeping_timer); | |
495 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
496 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
497 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
498 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 499 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
500 | } |
501 | #endif | |
472dbc45 JB |
502 | |
503 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
504 | { | |
505 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
506 | struct ieee80211_local *local = sdata->local; | |
507 | ||
09b17470 JB |
508 | local->fif_other_bss++; |
509 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
510 | atomic_inc(&local->iff_allmultis); | |
511 | ieee80211_configure_filter(local); | |
512 | ||
c7108a71 JC |
513 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
514 | ifmsh->mesh_sp_id = 0; /* Neighbor Offset */ | |
515 | ifmsh->mesh_auth_id = 0; /* Disabled */ | |
6b9ac442 | 516 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 517 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 518 | ieee80211_queue_work(&local->hw, &sdata->work); |
5b365834 | 519 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 520 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
521 | BSS_CHANGED_BEACON_ENABLED | |
522 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
523 | } |
524 | ||
525 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
526 | { | |
09b17470 | 527 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
528 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
529 | ||
530 | ifmsh->mesh_id_len = 0; | |
531 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
532 | sta_info_flush(local, NULL); | |
09b17470 | 533 | |
472dbc45 | 534 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 535 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
536 | /* |
537 | * If the timer fired while we waited for it, it will have | |
538 | * requeued the work. Now the work will be running again | |
539 | * but will not rearm the timer again because it checks | |
540 | * whether the interface is running, which, at this point, | |
541 | * it no longer is. | |
542 | */ | |
64592c8f | 543 | cancel_work_sync(&sdata->work); |
09b17470 JB |
544 | |
545 | local->fif_other_bss--; | |
546 | atomic_dec(&local->iff_allmultis); | |
547 | ieee80211_configure_filter(local); | |
472dbc45 JB |
548 | } |
549 | ||
550 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
551 | u16 stype, | |
552 | struct ieee80211_mgmt *mgmt, | |
553 | size_t len, | |
554 | struct ieee80211_rx_status *rx_status) | |
555 | { | |
c6a1fa12 | 556 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
557 | struct ieee802_11_elems elems; |
558 | struct ieee80211_channel *channel; | |
881d948c | 559 | u32 supp_rates = 0; |
472dbc45 JB |
560 | size_t baselen; |
561 | int freq; | |
562 | enum ieee80211_band band = rx_status->band; | |
563 | ||
564 | /* ignore ProbeResp to foreign address */ | |
565 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
47846c9b | 566 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
567 | return; |
568 | ||
569 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
570 | if (baselen > len) | |
571 | return; | |
572 | ||
573 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
574 | &elems); | |
575 | ||
5cff5e01 | 576 | /* ignore beacons from secure mesh peers if our security is off */ |
b130e5ce | 577 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
5cff5e01 JC |
578 | return; |
579 | ||
472dbc45 | 580 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 581 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
582 | else |
583 | freq = rx_status->freq; | |
584 | ||
585 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
586 | ||
587 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
588 | return; | |
589 | ||
590 | if (elems.mesh_id && elems.mesh_config && | |
591 | mesh_matches_local(&elems, sdata)) { | |
592 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
1570ca59 | 593 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems); |
472dbc45 JB |
594 | } |
595 | } | |
596 | ||
597 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
598 | struct ieee80211_mgmt *mgmt, | |
599 | size_t len, | |
600 | struct ieee80211_rx_status *rx_status) | |
601 | { | |
602 | switch (mgmt->u.action.category) { | |
97ad9139 | 603 | case WLAN_CATEGORY_MESH_PLINK: |
472dbc45 JB |
604 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
605 | break; | |
97ad9139 | 606 | case WLAN_CATEGORY_MESH_PATH_SEL: |
472dbc45 JB |
607 | mesh_rx_path_sel_frame(sdata, mgmt, len); |
608 | break; | |
609 | } | |
610 | } | |
611 | ||
1fa57d01 JB |
612 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
613 | struct sk_buff *skb) | |
472dbc45 JB |
614 | { |
615 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
616 | struct ieee80211_mgmt *mgmt; |
617 | u16 stype; | |
618 | ||
f1d58c25 | 619 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
620 | mgmt = (struct ieee80211_mgmt *) skb->data; |
621 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
622 | ||
623 | switch (stype) { | |
624 | case IEEE80211_STYPE_PROBE_RESP: | |
625 | case IEEE80211_STYPE_BEACON: | |
626 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
627 | rx_status); | |
628 | break; | |
629 | case IEEE80211_STYPE_ACTION: | |
630 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
631 | break; | |
632 | } | |
472dbc45 JB |
633 | } |
634 | ||
1fa57d01 | 635 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 636 | { |
472dbc45 | 637 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
638 | |
639 | if (ifmsh->preq_queue_len && | |
640 | time_after(jiffies, | |
641 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
642 | mesh_path_start_discovery(sdata); | |
643 | ||
18889231 JC |
644 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
645 | mesh_mpath_table_grow(); | |
646 | ||
dcac908b | 647 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
648 | mesh_mpp_table_grow(); |
649 | ||
650 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 651 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
652 | |
653 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
654 | ieee80211_mesh_rootpath(sdata); | |
472dbc45 JB |
655 | } |
656 | ||
657 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
658 | { | |
659 | struct ieee80211_sub_if_data *sdata; | |
660 | ||
661 | rcu_read_lock(); | |
662 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
663 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 664 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
665 | rcu_read_unlock(); |
666 | } | |
667 | ||
902acc78 JB |
668 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
669 | { | |
472dbc45 JB |
670 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
671 | ||
472dbc45 JB |
672 | setup_timer(&ifmsh->housekeeping_timer, |
673 | ieee80211_mesh_housekeeping_timer, | |
674 | (unsigned long) sdata); | |
472dbc45 | 675 | |
472dbc45 JB |
676 | ifmsh->accepting_plinks = true; |
677 | ifmsh->preq_id = 0; | |
d19b3bf6 | 678 | ifmsh->sn = 0; |
472dbc45 | 679 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 680 | mesh_rmc_init(sdata); |
472dbc45 | 681 | ifmsh->last_preq = jiffies; |
902acc78 JB |
682 | /* Allocate all mesh structures when creating the first mesh interface. */ |
683 | if (!mesh_allocated) | |
684 | ieee80211s_init(); | |
472dbc45 | 685 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
686 | ieee80211_mesh_path_timer, |
687 | (unsigned long) sdata); | |
e304bfd3 RP |
688 | setup_timer(&ifmsh->mesh_path_root_timer, |
689 | ieee80211_mesh_path_root_timer, | |
690 | (unsigned long) sdata); | |
472dbc45 JB |
691 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
692 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
693 | } |