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2e3c8736 LCC |
1 | /* |
2 | * Copyright (c) 2008 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 | ||
51ceddad | 11 | #include <asm/unaligned.h> |
2e3c8736 LCC |
12 | #include "ieee80211_i.h" |
13 | #include "mesh.h" | |
14 | ||
472dbc45 JB |
15 | #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ) |
16 | #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ) | |
17 | ||
24736701 JL |
18 | #define PP_OFFSET 1 /* Path Selection Protocol */ |
19 | #define PM_OFFSET 5 /* Path Selection Metric */ | |
20 | #define CC_OFFSET 9 /* Congestion Control Mode */ | |
9e03fdfd JC |
21 | #define SP_OFFSET 13 /* Synchronization Protocol */ |
22 | #define AUTH_OFFSET 17 /* Authentication Protocol */ | |
23 | #define CAPAB_OFFSET 22 | |
24 | #define CAPAB_ACCEPT_PLINKS 0x80 | |
25 | #define CAPAB_FORWARDING 0x10 | |
2e3c8736 | 26 | |
5bb644a0 JB |
27 | #define TMR_RUNNING_HK 0 |
28 | #define TMR_RUNNING_MP 1 | |
29 | ||
2e3c8736 LCC |
30 | int mesh_allocated; |
31 | static struct kmem_cache *rm_cache; | |
32 | ||
33 | void ieee80211s_init(void) | |
34 | { | |
35 | mesh_pathtbl_init(); | |
36 | mesh_allocated = 1; | |
37 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
38 | 0, 0, NULL); | |
39 | } | |
40 | ||
41 | void ieee80211s_stop(void) | |
42 | { | |
43 | mesh_pathtbl_unregister(); | |
44 | kmem_cache_destroy(rm_cache); | |
45 | } | |
46 | ||
472dbc45 JB |
47 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
48 | { | |
49 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
50 | struct ieee80211_local *local = sdata->local; | |
51 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
52 | ||
18889231 | 53 | ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING; |
5bb644a0 JB |
54 | |
55 | if (local->quiescing) { | |
56 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
57 | return; | |
58 | } | |
59 | ||
c03e20fc | 60 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
61 | } |
62 | ||
2e3c8736 LCC |
63 | /** |
64 | * mesh_matches_local - check if the config of a mesh point matches ours | |
65 | * | |
66 | * @ie: information elements of a management frame from the mesh peer | |
f698d856 | 67 | * @sdata: local mesh subif |
2e3c8736 LCC |
68 | * |
69 | * This function checks if the mesh configuration of a mesh point matches the | |
70 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
71 | */ | |
f698d856 | 72 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 73 | { |
472dbc45 | 74 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2e3c8736 | 75 | |
2e3c8736 LCC |
76 | /* |
77 | * As support for each feature is added, check for matching | |
78 | * - On mesh config capabilities | |
79 | * - Power Save Support En | |
80 | * - Sync support enabled | |
81 | * - Sync support active | |
82 | * - Sync support required from peer | |
83 | * - MDA enabled | |
84 | * - Power management control on fc | |
85 | */ | |
472dbc45 JB |
86 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
87 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
88 | memcmp(ifmsh->mesh_pp_id, ie->mesh_config + PP_OFFSET, 4) == 0 && | |
89 | memcmp(ifmsh->mesh_pm_id, ie->mesh_config + PM_OFFSET, 4) == 0 && | |
9e03fdfd JC |
90 | memcmp(ifmsh->mesh_cc_id, ie->mesh_config + CC_OFFSET, 4) == 0 && |
91 | memcmp(ifmsh->mesh_sp_id, ie->mesh_config + SP_OFFSET, 4) == 0 && | |
92 | memcmp(ifmsh->mesh_auth_id, ie->mesh_config + AUTH_OFFSET, 4) == 0) | |
2e3c8736 LCC |
93 | return true; |
94 | ||
95 | return false; | |
96 | } | |
97 | ||
98 | /** | |
99 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
100 | * | |
101 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 102 | */ |
f698d856 | 103 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 104 | { |
9e03fdfd | 105 | return (*(ie->mesh_config + CAPAB_OFFSET) & CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
106 | } |
107 | ||
108 | /** | |
109 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
110 | * | |
d0709a65 | 111 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 112 | */ |
d0709a65 | 113 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 114 | { |
2e3c8736 LCC |
115 | bool free_plinks; |
116 | ||
117 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
118 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
119 | * are already on the table but are not on PLINK_ESTAB state. However, |
120 | * in general the mesh interface is not accepting peer link requests | |
121 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
122 | */ |
123 | free_plinks = mesh_plink_availables(sdata); | |
124 | ||
472dbc45 JB |
125 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
126 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
127 | } |
128 | ||
472dbc45 | 129 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
2e3c8736 | 130 | { |
9e03fdfd JC |
131 | u8 oui[3] = {0x00, 0x0F, 0xAC}; |
132 | ||
133 | memcpy(sta->mesh_pp_id, oui, sizeof(oui)); | |
134 | memcpy(sta->mesh_pm_id, oui, sizeof(oui)); | |
135 | memcpy(sta->mesh_cc_id, oui, sizeof(oui)); | |
136 | memcpy(sta->mesh_sp_id, oui, sizeof(oui)); | |
137 | memcpy(sta->mesh_auth_id, oui, sizeof(oui)); | |
138 | sta->mesh_pp_id[sizeof(oui)] = 0; | |
139 | sta->mesh_pm_id[sizeof(oui)] = 0; | |
140 | sta->mesh_cc_id[sizeof(oui)] = 0xff; | |
141 | sta->mesh_sp_id[sizeof(oui)] = 0xff; | |
142 | sta->mesh_auth_id[sizeof(oui)] = 0x0; | |
2e3c8736 LCC |
143 | } |
144 | ||
f698d856 | 145 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 146 | { |
2e3c8736 LCC |
147 | int i; |
148 | ||
472dbc45 JB |
149 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
150 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 151 | return -ENOMEM; |
472dbc45 | 152 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 153 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 154 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
155 | return 0; |
156 | } | |
157 | ||
f698d856 | 158 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 159 | { |
472dbc45 | 160 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
161 | struct rmc_entry *p, *n; |
162 | int i; | |
163 | ||
472dbc45 | 164 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
165 | return; |
166 | ||
167 | for (i = 0; i < RMC_BUCKETS; i++) | |
168 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
169 | list_del(&p->list); | |
170 | kmem_cache_free(rm_cache, p); | |
171 | } | |
172 | ||
173 | kfree(rmc); | |
472dbc45 | 174 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
175 | } |
176 | ||
177 | /** | |
178 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
179 | * | |
180 | * @sa: source address | |
181 | * @mesh_hdr: mesh_header | |
182 | * | |
183 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
184 | * | |
185 | * Checks using the source address and the mesh sequence number if we have | |
186 | * received this frame lately. If the frame is not in the cache, it is added to | |
187 | * it. | |
188 | */ | |
189 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 190 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 191 | { |
472dbc45 | 192 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
193 | u32 seqnum = 0; |
194 | int entries = 0; | |
195 | u8 idx; | |
196 | struct rmc_entry *p, *n; | |
197 | ||
198 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
199 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
200 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
201 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
202 | ++entries; | |
203 | if (time_after(jiffies, p->exp_time) || | |
204 | (entries == RMC_QUEUE_MAX_LEN)) { | |
205 | list_del(&p->list); | |
206 | kmem_cache_free(rm_cache, p); | |
207 | --entries; | |
208 | } else if ((seqnum == p->seqnum) | |
209 | && (memcmp(sa, p->sa, ETH_ALEN) == 0)) | |
210 | return -1; | |
211 | } | |
212 | ||
213 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
214 | if (!p) { | |
215 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); | |
216 | return 0; | |
217 | } | |
218 | p->seqnum = seqnum; | |
219 | p->exp_time = jiffies + RMC_TIMEOUT; | |
220 | memcpy(p->sa, sa, ETH_ALEN); | |
221 | list_add(&p->list, &rmc->bucket[idx].list); | |
222 | return 0; | |
223 | } | |
224 | ||
f698d856 | 225 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 226 | { |
f698d856 | 227 | struct ieee80211_local *local = sdata->local; |
2e3c8736 LCC |
228 | struct ieee80211_supported_band *sband; |
229 | u8 *pos; | |
230 | int len, i, rate; | |
231 | ||
232 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
233 | len = sband->n_bitrates; | |
234 | if (len > 8) | |
235 | len = 8; | |
236 | pos = skb_put(skb, len + 2); | |
237 | *pos++ = WLAN_EID_SUPP_RATES; | |
238 | *pos++ = len; | |
239 | for (i = 0; i < len; i++) { | |
240 | rate = sband->bitrates[i].bitrate; | |
241 | *pos++ = (u8) (rate / 5); | |
242 | } | |
243 | ||
244 | if (sband->n_bitrates > len) { | |
245 | pos = skb_put(skb, sband->n_bitrates - len + 2); | |
246 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
247 | *pos++ = sband->n_bitrates - len; | |
248 | for (i = len; i < sband->n_bitrates; i++) { | |
249 | rate = sband->bitrates[i].bitrate; | |
250 | *pos++ = (u8) (rate / 5); | |
251 | } | |
252 | } | |
253 | ||
472dbc45 | 254 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
2e3c8736 | 255 | *pos++ = WLAN_EID_MESH_ID; |
472dbc45 JB |
256 | *pos++ = sdata->u.mesh.mesh_id_len; |
257 | if (sdata->u.mesh.mesh_id_len) | |
258 | memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); | |
2e3c8736 | 259 | |
9e03fdfd | 260 | pos = skb_put(skb, 2 + IEEE80211_MESH_CONFIG_LEN); |
2e3c8736 | 261 | *pos++ = WLAN_EID_MESH_CONFIG; |
1239cd58 | 262 | *pos++ = IEEE80211_MESH_CONFIG_LEN; |
2e3c8736 LCC |
263 | /* Version */ |
264 | *pos++ = 1; | |
265 | ||
266 | /* Active path selection protocol ID */ | |
472dbc45 | 267 | memcpy(pos, sdata->u.mesh.mesh_pp_id, 4); |
2e3c8736 LCC |
268 | pos += 4; |
269 | ||
270 | /* Active path selection metric ID */ | |
472dbc45 | 271 | memcpy(pos, sdata->u.mesh.mesh_pm_id, 4); |
2e3c8736 LCC |
272 | pos += 4; |
273 | ||
274 | /* Congestion control mode identifier */ | |
472dbc45 | 275 | memcpy(pos, sdata->u.mesh.mesh_cc_id, 4); |
2e3c8736 LCC |
276 | pos += 4; |
277 | ||
9e03fdfd JC |
278 | /* Synchronization protocol identifier */ |
279 | memcpy(pos, sdata->u.mesh.mesh_sp_id, 4); | |
2e3c8736 LCC |
280 | pos += 4; |
281 | ||
9e03fdfd JC |
282 | /* Authentication Protocol identifier */ |
283 | memcpy(pos, sdata->u.mesh.mesh_auth_id, 4); | |
284 | pos += 4; | |
285 | ||
286 | /* Mesh Formation Info */ | |
287 | memset(pos, 0x00, 1); | |
288 | pos += 1; | |
289 | ||
2e3c8736 | 290 | /* Mesh capability */ |
472dbc45 | 291 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
9e03fdfd JC |
292 | *pos = CAPAB_FORWARDING; |
293 | *pos++ |= sdata->u.mesh.accepting_plinks ? CAPAB_ACCEPT_PLINKS : 0x00; | |
2e3c8736 LCC |
294 | *pos++ = 0x00; |
295 | ||
296 | return; | |
297 | } | |
298 | ||
f698d856 | 299 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
2e3c8736 LCC |
300 | { |
301 | /* Use last four bytes of hw addr and interface index as hash index */ | |
f698d856 | 302 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
2e3c8736 LCC |
303 | & tbl->hash_mask; |
304 | } | |
305 | ||
2e3c8736 LCC |
306 | struct mesh_table *mesh_table_alloc(int size_order) |
307 | { | |
308 | int i; | |
309 | struct mesh_table *newtbl; | |
310 | ||
311 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); | |
312 | if (!newtbl) | |
313 | return NULL; | |
314 | ||
315 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * | |
316 | (1 << size_order), GFP_KERNEL); | |
317 | ||
318 | if (!newtbl->hash_buckets) { | |
319 | kfree(newtbl); | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * | |
324 | (1 << size_order), GFP_KERNEL); | |
325 | if (!newtbl->hashwlock) { | |
326 | kfree(newtbl->hash_buckets); | |
327 | kfree(newtbl); | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | newtbl->size_order = size_order; | |
332 | newtbl->hash_mask = (1 << size_order) - 1; | |
333 | atomic_set(&newtbl->entries, 0); | |
334 | get_random_bytes(&newtbl->hash_rnd, | |
335 | sizeof(newtbl->hash_rnd)); | |
336 | for (i = 0; i <= newtbl->hash_mask; i++) | |
337 | spin_lock_init(&newtbl->hashwlock[i]); | |
338 | ||
339 | return newtbl; | |
340 | } | |
341 | ||
2e3c8736 LCC |
342 | |
343 | static void ieee80211_mesh_path_timer(unsigned long data) | |
344 | { | |
345 | struct ieee80211_sub_if_data *sdata = | |
346 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 347 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 348 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 349 | |
5bb644a0 JB |
350 | if (local->quiescing) { |
351 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
352 | return; | |
353 | } | |
354 | ||
c03e20fc | 355 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
2e3c8736 LCC |
356 | } |
357 | ||
3c5772a5 JC |
358 | /** |
359 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
360 | * @hdr: 802.11 frame header | |
361 | * @fc: frame control field | |
362 | * @meshda: destination address in the mesh | |
363 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
364 | * locally originated. | |
365 | * | |
366 | * Return the length of the 802.11 (does not include a mesh control header) | |
367 | */ | |
368 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, char | |
369 | *meshda, char *meshsa) { | |
370 | if (is_multicast_ether_addr(meshda)) { | |
371 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
372 | /* DA TA SA */ | |
373 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
374 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
375 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
376 | return 24; | |
377 | } else { | |
378 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
379 | IEEE80211_FCTL_TODS); | |
380 | /* RA TA DA SA */ | |
381 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
382 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
383 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
384 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
385 | return 30; | |
386 | } | |
387 | } | |
388 | ||
902acc78 JB |
389 | /** |
390 | * ieee80211_new_mesh_header - create a new mesh header | |
391 | * @meshhdr: uninitialized mesh header | |
392 | * @sdata: mesh interface to be used | |
3c5772a5 JC |
393 | * @addr4: addr4 of the mesh frame (1st in ae header) |
394 | * may be NULL | |
395 | * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) | |
396 | * may be NULL unless addr6 is present | |
397 | * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) | |
398 | * may be NULL unless addr5 is present | |
902acc78 JB |
399 | * |
400 | * Return the header length. | |
401 | */ | |
402 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
3c5772a5 JC |
403 | struct ieee80211_sub_if_data *sdata, char *addr4, |
404 | char *addr5, char *addr6) | |
902acc78 | 405 | { |
3c5772a5 JC |
406 | int aelen = 0; |
407 | memset(meshhdr, 0, sizeof(meshhdr)); | |
472dbc45 JB |
408 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
409 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
410 | sdata->u.mesh.mesh_seqnum++; | |
3c5772a5 JC |
411 | if (addr4) { |
412 | meshhdr->flags |= MESH_FLAGS_AE_A4; | |
413 | aelen += ETH_ALEN; | |
414 | memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); | |
415 | } | |
416 | if (addr5 && addr6) { | |
417 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; | |
418 | aelen += 2 * ETH_ALEN; | |
419 | if (!addr4) { | |
420 | memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); | |
421 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
422 | } else { | |
423 | memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); | |
424 | memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); | |
425 | } | |
426 | } | |
427 | return 6 + aelen; | |
902acc78 JB |
428 | } |
429 | ||
472dbc45 JB |
430 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
431 | struct ieee80211_if_mesh *ifmsh) | |
432 | { | |
433 | bool free_plinks; | |
434 | ||
435 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
436 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
437 | sdata->dev->name); | |
438 | #endif | |
439 | ||
440 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
441 | mesh_path_expire(sdata); | |
442 | ||
443 | free_plinks = mesh_plink_availables(sdata); | |
444 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 445 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 446 | |
472dbc45 JB |
447 | mod_timer(&ifmsh->housekeeping_timer, |
448 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
449 | } | |
450 | ||
5bb644a0 JB |
451 | #ifdef CONFIG_PM |
452 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
453 | { | |
454 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
455 | ||
456 | /* might restart the timer but that doesn't matter */ | |
457 | cancel_work_sync(&ifmsh->work); | |
458 | ||
459 | /* use atomic bitops in case both timers fire at the same time */ | |
460 | ||
461 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
462 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
463 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
464 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
465 | } | |
466 | ||
467 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
468 | { | |
469 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
470 | ||
471 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
472 | add_timer(&ifmsh->housekeeping_timer); | |
473 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
474 | add_timer(&ifmsh->mesh_path_timer); | |
475 | } | |
476 | #endif | |
472dbc45 JB |
477 | |
478 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
479 | { | |
480 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
481 | struct ieee80211_local *local = sdata->local; | |
482 | ||
18889231 JC |
483 | ifmsh->wrkq_flags |= MESH_WORK_HOUSEKEEPING; |
484 | ieee80211_queue_work(&local->hw, &ifmsh->work); | |
5b365834 | 485 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 486 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
487 | BSS_CHANGED_BEACON_ENABLED | |
488 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
489 | } |
490 | ||
491 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
492 | { | |
493 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); | |
b7413430 JB |
494 | /* |
495 | * If the timer fired while we waited for it, it will have | |
496 | * requeued the work. Now the work will be running again | |
497 | * but will not rearm the timer again because it checks | |
498 | * whether the interface is running, which, at this point, | |
499 | * it no longer is. | |
500 | */ | |
501 | cancel_work_sync(&sdata->u.mesh.work); | |
502 | ||
472dbc45 JB |
503 | /* |
504 | * When we get here, the interface is marked down. | |
505 | * Call synchronize_rcu() to wait for the RX path | |
506 | * should it be using the interface and enqueuing | |
507 | * frames at this very time on another CPU. | |
508 | */ | |
4a27096b | 509 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
472dbc45 JB |
510 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
511 | } | |
512 | ||
513 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
514 | u16 stype, | |
515 | struct ieee80211_mgmt *mgmt, | |
516 | size_t len, | |
517 | struct ieee80211_rx_status *rx_status) | |
518 | { | |
c6a1fa12 | 519 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
520 | struct ieee802_11_elems elems; |
521 | struct ieee80211_channel *channel; | |
881d948c | 522 | u32 supp_rates = 0; |
472dbc45 JB |
523 | size_t baselen; |
524 | int freq; | |
525 | enum ieee80211_band band = rx_status->band; | |
526 | ||
527 | /* ignore ProbeResp to foreign address */ | |
528 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
529 | compare_ether_addr(mgmt->da, sdata->dev->dev_addr)) | |
530 | return; | |
531 | ||
532 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
533 | if (baselen > len) | |
534 | return; | |
535 | ||
536 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
537 | &elems); | |
538 | ||
539 | if (elems.ds_params && elems.ds_params_len == 1) | |
540 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); | |
541 | else | |
542 | freq = rx_status->freq; | |
543 | ||
544 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
545 | ||
546 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
547 | return; | |
548 | ||
549 | if (elems.mesh_id && elems.mesh_config && | |
550 | mesh_matches_local(&elems, sdata)) { | |
551 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
552 | ||
553 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, | |
554 | mesh_peer_accepts_plinks(&elems)); | |
555 | } | |
556 | } | |
557 | ||
558 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
559 | struct ieee80211_mgmt *mgmt, | |
560 | size_t len, | |
561 | struct ieee80211_rx_status *rx_status) | |
562 | { | |
563 | switch (mgmt->u.action.category) { | |
564 | case PLINK_CATEGORY: | |
565 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
566 | break; | |
567 | case MESH_PATH_SEL_CATEGORY: | |
568 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
569 | break; | |
570 | } | |
571 | } | |
572 | ||
573 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
574 | struct sk_buff *skb) | |
575 | { | |
576 | struct ieee80211_rx_status *rx_status; | |
577 | struct ieee80211_if_mesh *ifmsh; | |
578 | struct ieee80211_mgmt *mgmt; | |
579 | u16 stype; | |
580 | ||
581 | ifmsh = &sdata->u.mesh; | |
582 | ||
f1d58c25 | 583 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
584 | mgmt = (struct ieee80211_mgmt *) skb->data; |
585 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
586 | ||
587 | switch (stype) { | |
588 | case IEEE80211_STYPE_PROBE_RESP: | |
589 | case IEEE80211_STYPE_BEACON: | |
590 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
591 | rx_status); | |
592 | break; | |
593 | case IEEE80211_STYPE_ACTION: | |
594 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
595 | break; | |
596 | } | |
597 | ||
598 | kfree_skb(skb); | |
599 | } | |
600 | ||
601 | static void ieee80211_mesh_work(struct work_struct *work) | |
602 | { | |
603 | struct ieee80211_sub_if_data *sdata = | |
604 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); | |
605 | struct ieee80211_local *local = sdata->local; | |
606 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
607 | struct sk_buff *skb; | |
608 | ||
609 | if (!netif_running(sdata->dev)) | |
610 | return; | |
611 | ||
fbe9c429 | 612 | if (local->scanning) |
472dbc45 JB |
613 | return; |
614 | ||
615 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) | |
616 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
617 | ||
618 | if (ifmsh->preq_queue_len && | |
619 | time_after(jiffies, | |
620 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
621 | mesh_path_start_discovery(sdata); | |
622 | ||
18889231 JC |
623 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
624 | mesh_mpath_table_grow(); | |
625 | ||
626 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) | |
627 | mesh_mpp_table_grow(); | |
628 | ||
629 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 JB |
630 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
631 | } | |
632 | ||
633 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
634 | { | |
635 | struct ieee80211_sub_if_data *sdata; | |
636 | ||
637 | rcu_read_lock(); | |
638 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
639 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c03e20fc | 640 | ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); |
472dbc45 JB |
641 | rcu_read_unlock(); |
642 | } | |
643 | ||
902acc78 JB |
644 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
645 | { | |
472dbc45 JB |
646 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
647 | ||
648 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); | |
649 | setup_timer(&ifmsh->housekeeping_timer, | |
650 | ieee80211_mesh_housekeeping_timer, | |
651 | (unsigned long) sdata); | |
652 | skb_queue_head_init(&sdata->u.mesh.skb_queue); | |
653 | ||
654 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; | |
655 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; | |
656 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; | |
657 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; | |
658 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; | |
659 | ifmsh->mshcfg.auto_open_plinks = true; | |
660 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = | |
902acc78 | 661 | MESH_MAX_ESTAB_PLINKS; |
472dbc45 | 662 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
902acc78 | 663 | MESH_PATH_TIMEOUT; |
472dbc45 | 664 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
902acc78 | 665 | MESH_PREQ_MIN_INT; |
472dbc45 | 666 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
902acc78 | 667 | MESH_DIAM_TRAVERSAL_TIME; |
472dbc45 | 668 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
902acc78 | 669 | MESH_MAX_PREQ_RETRIES; |
472dbc45 | 670 | ifmsh->mshcfg.path_refresh_time = |
902acc78 | 671 | MESH_PATH_REFRESH_TIME; |
472dbc45 | 672 | ifmsh->mshcfg.min_discovery_timeout = |
902acc78 | 673 | MESH_MIN_DISCOVERY_TIMEOUT; |
472dbc45 JB |
674 | ifmsh->accepting_plinks = true; |
675 | ifmsh->preq_id = 0; | |
676 | ifmsh->dsn = 0; | |
677 | atomic_set(&ifmsh->mpaths, 0); | |
f698d856 | 678 | mesh_rmc_init(sdata); |
472dbc45 | 679 | ifmsh->last_preq = jiffies; |
902acc78 JB |
680 | /* Allocate all mesh structures when creating the first mesh interface. */ |
681 | if (!mesh_allocated) | |
682 | ieee80211s_init(); | |
472dbc45 JB |
683 | mesh_ids_set_default(ifmsh); |
684 | setup_timer(&ifmsh->mesh_path_timer, | |
902acc78 JB |
685 | ieee80211_mesh_path_timer, |
686 | (unsigned long) sdata); | |
472dbc45 JB |
687 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
688 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
689 | } | |
690 | ||
691 | ieee80211_rx_result | |
f1d58c25 | 692 | ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
472dbc45 JB |
693 | { |
694 | struct ieee80211_local *local = sdata->local; | |
695 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
696 | struct ieee80211_mgmt *mgmt; | |
697 | u16 fc; | |
698 | ||
699 | if (skb->len < 24) | |
700 | return RX_DROP_MONITOR; | |
701 | ||
702 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
703 | fc = le16_to_cpu(mgmt->frame_control); | |
704 | ||
705 | switch (fc & IEEE80211_FCTL_STYPE) { | |
a43816df JB |
706 | case IEEE80211_STYPE_ACTION: |
707 | if (skb->len < IEEE80211_MIN_ACTION_SIZE) | |
708 | return RX_DROP_MONITOR; | |
709 | /* fall through */ | |
472dbc45 JB |
710 | case IEEE80211_STYPE_PROBE_RESP: |
711 | case IEEE80211_STYPE_BEACON: | |
472dbc45 | 712 | skb_queue_tail(&ifmsh->skb_queue, skb); |
c03e20fc | 713 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
714 | return RX_QUEUED; |
715 | } | |
716 | ||
717 | return RX_CONTINUE; | |
902acc78 | 718 | } |