Commit | Line | Data |
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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) | |
e304bfd3 | 17 | #define IEEE80211_MESH_RANN_INTERVAL (1 * HZ) |
472dbc45 | 18 | |
3491707a RP |
19 | #define MESHCONF_PP_OFFSET 0 /* Path Selection Protocol */ |
20 | #define MESHCONF_PM_OFFSET 1 /* Path Selection Metric */ | |
21 | #define MESHCONF_CC_OFFSET 2 /* Congestion Control Mode */ | |
22 | #define MESHCONF_SP_OFFSET 3 /* Synchronization Protocol */ | |
23 | #define MESHCONF_AUTH_OFFSET 4 /* Authentication Protocol */ | |
24 | #define MESHCONF_CAPAB_OFFSET 6 | |
25 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 | |
26 | #define MESHCONF_CAPAB_FORWARDING 0x08 | |
2e3c8736 | 27 | |
5bb644a0 JB |
28 | #define TMR_RUNNING_HK 0 |
29 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 30 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 31 | |
2e3c8736 LCC |
32 | int mesh_allocated; |
33 | static struct kmem_cache *rm_cache; | |
34 | ||
35 | void ieee80211s_init(void) | |
36 | { | |
37 | mesh_pathtbl_init(); | |
38 | mesh_allocated = 1; | |
39 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
40 | 0, 0, NULL); | |
41 | } | |
42 | ||
43 | void ieee80211s_stop(void) | |
44 | { | |
45 | mesh_pathtbl_unregister(); | |
46 | kmem_cache_destroy(rm_cache); | |
47 | } | |
48 | ||
472dbc45 JB |
49 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
50 | { | |
51 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
52 | struct ieee80211_local *local = sdata->local; | |
53 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
54 | ||
6b9ac442 | 55 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
56 | |
57 | if (local->quiescing) { | |
58 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
59 | return; | |
60 | } | |
61 | ||
c03e20fc | 62 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
63 | } |
64 | ||
2e3c8736 LCC |
65 | /** |
66 | * mesh_matches_local - check if the config of a mesh point matches ours | |
67 | * | |
68 | * @ie: information elements of a management frame from the mesh peer | |
f698d856 | 69 | * @sdata: local mesh subif |
2e3c8736 LCC |
70 | * |
71 | * This function checks if the mesh configuration of a mesh point matches the | |
72 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
73 | */ | |
f698d856 | 74 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 75 | { |
472dbc45 | 76 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2e3c8736 | 77 | |
2e3c8736 LCC |
78 | /* |
79 | * As support for each feature is added, check for matching | |
80 | * - On mesh config capabilities | |
81 | * - Power Save Support En | |
82 | * - Sync support enabled | |
83 | * - Sync support active | |
84 | * - Sync support required from peer | |
85 | * - MDA enabled | |
86 | * - Power management control on fc | |
87 | */ | |
472dbc45 JB |
88 | if (ifmsh->mesh_id_len == ie->mesh_id_len && |
89 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
3491707a RP |
90 | (ifmsh->mesh_pp_id == *(ie->mesh_config + MESHCONF_PP_OFFSET))&& |
91 | (ifmsh->mesh_pm_id == *(ie->mesh_config + MESHCONF_PM_OFFSET))&& | |
92 | (ifmsh->mesh_cc_id == *(ie->mesh_config + MESHCONF_CC_OFFSET))&& | |
93 | (ifmsh->mesh_sp_id == *(ie->mesh_config + MESHCONF_SP_OFFSET))&& | |
94 | (ifmsh->mesh_auth_id == *(ie->mesh_config + | |
95 | MESHCONF_AUTH_OFFSET))) | |
2e3c8736 LCC |
96 | return true; |
97 | ||
98 | return false; | |
99 | } | |
100 | ||
101 | /** | |
102 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
103 | * | |
104 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 105 | */ |
f698d856 | 106 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 107 | { |
3491707a RP |
108 | return (*(ie->mesh_config + MESHCONF_CAPAB_OFFSET) & |
109 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; | |
2e3c8736 LCC |
110 | } |
111 | ||
112 | /** | |
113 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
114 | * | |
d0709a65 | 115 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 116 | */ |
d0709a65 | 117 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 118 | { |
2e3c8736 LCC |
119 | bool free_plinks; |
120 | ||
121 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
122 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
123 | * are already on the table but are not on PLINK_ESTAB state. However, |
124 | * in general the mesh interface is not accepting peer link requests | |
125 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
126 | */ |
127 | free_plinks = mesh_plink_availables(sdata); | |
128 | ||
472dbc45 JB |
129 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
130 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
131 | } |
132 | ||
472dbc45 | 133 | void mesh_ids_set_default(struct ieee80211_if_mesh *sta) |
2e3c8736 | 134 | { |
3491707a RP |
135 | sta->mesh_pp_id = 0; /* HWMP */ |
136 | sta->mesh_pm_id = 0; /* Airtime */ | |
137 | sta->mesh_cc_id = 0; /* Disabled */ | |
138 | sta->mesh_sp_id = 0; /* Neighbor Offset */ | |
139 | sta->mesh_auth_id = 0; /* Disabled */ | |
2e3c8736 LCC |
140 | } |
141 | ||
f698d856 | 142 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 143 | { |
2e3c8736 LCC |
144 | int i; |
145 | ||
472dbc45 JB |
146 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
147 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 148 | return -ENOMEM; |
472dbc45 | 149 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 150 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 151 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
152 | return 0; |
153 | } | |
154 | ||
f698d856 | 155 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 156 | { |
472dbc45 | 157 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
158 | struct rmc_entry *p, *n; |
159 | int i; | |
160 | ||
472dbc45 | 161 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
162 | return; |
163 | ||
164 | for (i = 0; i < RMC_BUCKETS; i++) | |
165 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
166 | list_del(&p->list); | |
167 | kmem_cache_free(rm_cache, p); | |
168 | } | |
169 | ||
170 | kfree(rmc); | |
472dbc45 | 171 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
172 | } |
173 | ||
174 | /** | |
175 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
176 | * | |
177 | * @sa: source address | |
178 | * @mesh_hdr: mesh_header | |
179 | * | |
180 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
181 | * | |
182 | * Checks using the source address and the mesh sequence number if we have | |
183 | * received this frame lately. If the frame is not in the cache, it is added to | |
184 | * it. | |
185 | */ | |
186 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 187 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 188 | { |
472dbc45 | 189 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
190 | u32 seqnum = 0; |
191 | int entries = 0; | |
192 | u8 idx; | |
193 | struct rmc_entry *p, *n; | |
194 | ||
195 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
196 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
197 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
198 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
199 | ++entries; | |
200 | if (time_after(jiffies, p->exp_time) || | |
201 | (entries == RMC_QUEUE_MAX_LEN)) { | |
202 | list_del(&p->list); | |
203 | kmem_cache_free(rm_cache, p); | |
204 | --entries; | |
205 | } else if ((seqnum == p->seqnum) | |
206 | && (memcmp(sa, p->sa, ETH_ALEN) == 0)) | |
207 | return -1; | |
208 | } | |
209 | ||
210 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
211 | if (!p) { | |
212 | printk(KERN_DEBUG "o11s: could not allocate RMC entry\n"); | |
213 | return 0; | |
214 | } | |
215 | p->seqnum = seqnum; | |
216 | p->exp_time = jiffies + RMC_TIMEOUT; | |
217 | memcpy(p->sa, sa, ETH_ALEN); | |
218 | list_add(&p->list, &rmc->bucket[idx].list); | |
219 | return 0; | |
220 | } | |
221 | ||
f698d856 | 222 | void mesh_mgmt_ies_add(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 223 | { |
f698d856 | 224 | struct ieee80211_local *local = sdata->local; |
2e3c8736 LCC |
225 | struct ieee80211_supported_band *sband; |
226 | u8 *pos; | |
227 | int len, i, rate; | |
8f2fda95 | 228 | u8 neighbors; |
2e3c8736 LCC |
229 | |
230 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
231 | len = sband->n_bitrates; | |
232 | if (len > 8) | |
233 | len = 8; | |
234 | pos = skb_put(skb, len + 2); | |
235 | *pos++ = WLAN_EID_SUPP_RATES; | |
236 | *pos++ = len; | |
237 | for (i = 0; i < len; i++) { | |
238 | rate = sband->bitrates[i].bitrate; | |
239 | *pos++ = (u8) (rate / 5); | |
240 | } | |
241 | ||
242 | if (sband->n_bitrates > len) { | |
243 | pos = skb_put(skb, sband->n_bitrates - len + 2); | |
244 | *pos++ = WLAN_EID_EXT_SUPP_RATES; | |
245 | *pos++ = sband->n_bitrates - len; | |
246 | for (i = len; i < sband->n_bitrates; i++) { | |
247 | rate = sband->bitrates[i].bitrate; | |
248 | *pos++ = (u8) (rate / 5); | |
249 | } | |
250 | } | |
251 | ||
be125c60 RP |
252 | if (sband->band == IEEE80211_BAND_2GHZ) { |
253 | pos = skb_put(skb, 2 + 1); | |
254 | *pos++ = WLAN_EID_DS_PARAMS; | |
255 | *pos++ = 1; | |
256 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); | |
257 | } | |
258 | ||
472dbc45 | 259 | pos = skb_put(skb, 2 + sdata->u.mesh.mesh_id_len); |
2e3c8736 | 260 | *pos++ = WLAN_EID_MESH_ID; |
472dbc45 JB |
261 | *pos++ = sdata->u.mesh.mesh_id_len; |
262 | if (sdata->u.mesh.mesh_id_len) | |
263 | memcpy(pos, sdata->u.mesh.mesh_id, sdata->u.mesh.mesh_id_len); | |
2e3c8736 | 264 | |
9e03fdfd | 265 | pos = skb_put(skb, 2 + IEEE80211_MESH_CONFIG_LEN); |
2e3c8736 | 266 | *pos++ = WLAN_EID_MESH_CONFIG; |
1239cd58 | 267 | *pos++ = IEEE80211_MESH_CONFIG_LEN; |
2e3c8736 LCC |
268 | |
269 | /* Active path selection protocol ID */ | |
3491707a | 270 | *pos++ = sdata->u.mesh.mesh_pp_id; |
2e3c8736 LCC |
271 | |
272 | /* Active path selection metric ID */ | |
3491707a | 273 | *pos++ = sdata->u.mesh.mesh_pm_id; |
2e3c8736 LCC |
274 | |
275 | /* Congestion control mode identifier */ | |
3491707a | 276 | *pos++ = sdata->u.mesh.mesh_cc_id; |
2e3c8736 | 277 | |
9e03fdfd | 278 | /* Synchronization protocol identifier */ |
3491707a | 279 | *pos++ = sdata->u.mesh.mesh_sp_id; |
2e3c8736 | 280 | |
9e03fdfd | 281 | /* Authentication Protocol identifier */ |
3491707a | 282 | *pos++ = sdata->u.mesh.mesh_auth_id; |
9e03fdfd | 283 | |
8f2fda95 RP |
284 | /* Mesh Formation Info - number of neighbors */ |
285 | neighbors = atomic_read(&sdata->u.mesh.mshstats.estab_plinks); | |
286 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
287 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
288 | *pos++ = neighbors << 1; | |
9e03fdfd | 289 | |
2e3c8736 | 290 | /* Mesh capability */ |
472dbc45 | 291 | sdata->u.mesh.accepting_plinks = mesh_plink_availables(sdata); |
3491707a RP |
292 | *pos = MESHCONF_CAPAB_FORWARDING; |
293 | *pos++ |= sdata->u.mesh.accepting_plinks ? | |
294 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; | |
2e3c8736 LCC |
295 | *pos++ = 0x00; |
296 | ||
297 | return; | |
298 | } | |
299 | ||
f698d856 | 300 | u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_table *tbl) |
2e3c8736 LCC |
301 | { |
302 | /* Use last four bytes of hw addr and interface index as hash index */ | |
f698d856 | 303 | return jhash_2words(*(u32 *)(addr+2), sdata->dev->ifindex, tbl->hash_rnd) |
2e3c8736 LCC |
304 | & tbl->hash_mask; |
305 | } | |
306 | ||
2e3c8736 LCC |
307 | struct mesh_table *mesh_table_alloc(int size_order) |
308 | { | |
309 | int i; | |
310 | struct mesh_table *newtbl; | |
311 | ||
312 | newtbl = kmalloc(sizeof(struct mesh_table), GFP_KERNEL); | |
313 | if (!newtbl) | |
314 | return NULL; | |
315 | ||
316 | newtbl->hash_buckets = kzalloc(sizeof(struct hlist_head) * | |
317 | (1 << size_order), GFP_KERNEL); | |
318 | ||
319 | if (!newtbl->hash_buckets) { | |
320 | kfree(newtbl); | |
321 | return NULL; | |
322 | } | |
323 | ||
324 | newtbl->hashwlock = kmalloc(sizeof(spinlock_t) * | |
325 | (1 << size_order), GFP_KERNEL); | |
326 | if (!newtbl->hashwlock) { | |
327 | kfree(newtbl->hash_buckets); | |
328 | kfree(newtbl); | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | newtbl->size_order = size_order; | |
333 | newtbl->hash_mask = (1 << size_order) - 1; | |
334 | atomic_set(&newtbl->entries, 0); | |
335 | get_random_bytes(&newtbl->hash_rnd, | |
336 | sizeof(newtbl->hash_rnd)); | |
337 | for (i = 0; i <= newtbl->hash_mask; i++) | |
338 | spin_lock_init(&newtbl->hashwlock[i]); | |
339 | ||
340 | return newtbl; | |
341 | } | |
342 | ||
2e3c8736 LCC |
343 | |
344 | static void ieee80211_mesh_path_timer(unsigned long data) | |
345 | { | |
346 | struct ieee80211_sub_if_data *sdata = | |
347 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 348 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 349 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 350 | |
5bb644a0 JB |
351 | if (local->quiescing) { |
352 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
353 | return; | |
354 | } | |
355 | ||
c03e20fc | 356 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
2e3c8736 LCC |
357 | } |
358 | ||
e304bfd3 RP |
359 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
360 | { | |
361 | struct ieee80211_sub_if_data *sdata = | |
362 | (struct ieee80211_sub_if_data *) data; | |
363 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
364 | struct ieee80211_local *local = sdata->local; | |
365 | ||
366 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
367 | ||
368 | if (local->quiescing) { | |
369 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
370 | return; | |
371 | } | |
372 | ||
373 | ieee80211_queue_work(&local->hw, &ifmsh->work); | |
374 | } | |
375 | ||
63c5723b RP |
376 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
377 | { | |
378 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
379 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
380 | else { | |
381 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
382 | /* stop running timer */ | |
383 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
384 | } | |
385 | } | |
386 | ||
3c5772a5 JC |
387 | /** |
388 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
389 | * @hdr: 802.11 frame header | |
390 | * @fc: frame control field | |
391 | * @meshda: destination address in the mesh | |
392 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
393 | * locally originated. | |
394 | * | |
395 | * Return the length of the 802.11 (does not include a mesh control header) | |
396 | */ | |
397 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, char | |
398 | *meshda, char *meshsa) { | |
399 | if (is_multicast_ether_addr(meshda)) { | |
400 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
401 | /* DA TA SA */ | |
402 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
403 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
404 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
405 | return 24; | |
406 | } else { | |
407 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
408 | IEEE80211_FCTL_TODS); | |
409 | /* RA TA DA SA */ | |
410 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
411 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
412 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
413 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
414 | return 30; | |
415 | } | |
416 | } | |
417 | ||
902acc78 JB |
418 | /** |
419 | * ieee80211_new_mesh_header - create a new mesh header | |
420 | * @meshhdr: uninitialized mesh header | |
421 | * @sdata: mesh interface to be used | |
3c5772a5 JC |
422 | * @addr4: addr4 of the mesh frame (1st in ae header) |
423 | * may be NULL | |
424 | * @addr5: addr5 of the mesh frame (1st or 2nd in ae header) | |
425 | * may be NULL unless addr6 is present | |
426 | * @addr6: addr6 of the mesh frame (2nd or 3rd in ae header) | |
427 | * may be NULL unless addr5 is present | |
902acc78 JB |
428 | * |
429 | * Return the header length. | |
430 | */ | |
431 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
3c5772a5 JC |
432 | struct ieee80211_sub_if_data *sdata, char *addr4, |
433 | char *addr5, char *addr6) | |
902acc78 | 434 | { |
3c5772a5 JC |
435 | int aelen = 0; |
436 | memset(meshhdr, 0, sizeof(meshhdr)); | |
472dbc45 JB |
437 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
438 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
439 | sdata->u.mesh.mesh_seqnum++; | |
3c5772a5 JC |
440 | if (addr4) { |
441 | meshhdr->flags |= MESH_FLAGS_AE_A4; | |
442 | aelen += ETH_ALEN; | |
443 | memcpy(meshhdr->eaddr1, addr4, ETH_ALEN); | |
444 | } | |
445 | if (addr5 && addr6) { | |
446 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; | |
447 | aelen += 2 * ETH_ALEN; | |
448 | if (!addr4) { | |
449 | memcpy(meshhdr->eaddr1, addr5, ETH_ALEN); | |
450 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
451 | } else { | |
452 | memcpy(meshhdr->eaddr2, addr5, ETH_ALEN); | |
453 | memcpy(meshhdr->eaddr3, addr6, ETH_ALEN); | |
454 | } | |
455 | } | |
456 | return 6 + aelen; | |
902acc78 JB |
457 | } |
458 | ||
472dbc45 JB |
459 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
460 | struct ieee80211_if_mesh *ifmsh) | |
461 | { | |
462 | bool free_plinks; | |
463 | ||
464 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
465 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
466 | sdata->dev->name); | |
467 | #endif | |
468 | ||
469 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
470 | mesh_path_expire(sdata); | |
471 | ||
472 | free_plinks = mesh_plink_availables(sdata); | |
473 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 474 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 475 | |
472dbc45 JB |
476 | mod_timer(&ifmsh->housekeeping_timer, |
477 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
478 | } | |
479 | ||
e304bfd3 RP |
480 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
481 | { | |
482 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
483 | ||
484 | mesh_path_tx_root_frame(sdata); | |
485 | mod_timer(&ifmsh->mesh_path_root_timer, | |
486 | round_jiffies(jiffies + IEEE80211_MESH_RANN_INTERVAL)); | |
487 | } | |
488 | ||
5bb644a0 JB |
489 | #ifdef CONFIG_PM |
490 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
491 | { | |
492 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
493 | ||
494 | /* might restart the timer but that doesn't matter */ | |
495 | cancel_work_sync(&ifmsh->work); | |
496 | ||
497 | /* use atomic bitops in case both timers fire at the same time */ | |
498 | ||
499 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
500 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
501 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
502 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
503 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
504 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
505 | } |
506 | ||
507 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
508 | { | |
509 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
510 | ||
511 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
512 | add_timer(&ifmsh->housekeeping_timer); | |
513 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
514 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
515 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
516 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 517 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
518 | } |
519 | #endif | |
472dbc45 JB |
520 | |
521 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
522 | { | |
523 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
524 | struct ieee80211_local *local = sdata->local; | |
525 | ||
6b9ac442 | 526 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 527 | ieee80211_mesh_root_setup(ifmsh); |
18889231 | 528 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
5b365834 | 529 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 530 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
531 | BSS_CHANGED_BEACON_ENABLED | |
532 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
533 | } |
534 | ||
535 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
536 | { | |
537 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); | |
e304bfd3 | 538 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
539 | /* |
540 | * If the timer fired while we waited for it, it will have | |
541 | * requeued the work. Now the work will be running again | |
542 | * but will not rearm the timer again because it checks | |
543 | * whether the interface is running, which, at this point, | |
544 | * it no longer is. | |
545 | */ | |
546 | cancel_work_sync(&sdata->u.mesh.work); | |
547 | ||
472dbc45 JB |
548 | /* |
549 | * When we get here, the interface is marked down. | |
550 | * Call synchronize_rcu() to wait for the RX path | |
551 | * should it be using the interface and enqueuing | |
552 | * frames at this very time on another CPU. | |
553 | */ | |
4a27096b | 554 | rcu_barrier(); /* Wait for RX path and call_rcu()'s */ |
472dbc45 JB |
555 | skb_queue_purge(&sdata->u.mesh.skb_queue); |
556 | } | |
557 | ||
558 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
559 | u16 stype, | |
560 | struct ieee80211_mgmt *mgmt, | |
561 | size_t len, | |
562 | struct ieee80211_rx_status *rx_status) | |
563 | { | |
c6a1fa12 | 564 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
565 | struct ieee802_11_elems elems; |
566 | struct ieee80211_channel *channel; | |
881d948c | 567 | u32 supp_rates = 0; |
472dbc45 JB |
568 | size_t baselen; |
569 | int freq; | |
570 | enum ieee80211_band band = rx_status->band; | |
571 | ||
572 | /* ignore ProbeResp to foreign address */ | |
573 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
574 | compare_ether_addr(mgmt->da, sdata->dev->dev_addr)) | |
575 | return; | |
576 | ||
577 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
578 | if (baselen > len) | |
579 | return; | |
580 | ||
581 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
582 | &elems); | |
583 | ||
584 | if (elems.ds_params && elems.ds_params_len == 1) | |
585 | freq = ieee80211_channel_to_frequency(elems.ds_params[0]); | |
586 | else | |
587 | freq = rx_status->freq; | |
588 | ||
589 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
590 | ||
591 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
592 | return; | |
593 | ||
594 | if (elems.mesh_id && elems.mesh_config && | |
595 | mesh_matches_local(&elems, sdata)) { | |
596 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
597 | ||
598 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, | |
599 | mesh_peer_accepts_plinks(&elems)); | |
600 | } | |
601 | } | |
602 | ||
603 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
604 | struct ieee80211_mgmt *mgmt, | |
605 | size_t len, | |
606 | struct ieee80211_rx_status *rx_status) | |
607 | { | |
608 | switch (mgmt->u.action.category) { | |
0938393f | 609 | case MESH_PLINK_CATEGORY: |
472dbc45 JB |
610 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); |
611 | break; | |
612 | case MESH_PATH_SEL_CATEGORY: | |
613 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
614 | break; | |
615 | } | |
616 | } | |
617 | ||
618 | static void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, | |
619 | struct sk_buff *skb) | |
620 | { | |
621 | struct ieee80211_rx_status *rx_status; | |
622 | struct ieee80211_if_mesh *ifmsh; | |
623 | struct ieee80211_mgmt *mgmt; | |
624 | u16 stype; | |
625 | ||
626 | ifmsh = &sdata->u.mesh; | |
627 | ||
f1d58c25 | 628 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
629 | mgmt = (struct ieee80211_mgmt *) skb->data; |
630 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
631 | ||
632 | switch (stype) { | |
633 | case IEEE80211_STYPE_PROBE_RESP: | |
634 | case IEEE80211_STYPE_BEACON: | |
635 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
636 | rx_status); | |
637 | break; | |
638 | case IEEE80211_STYPE_ACTION: | |
639 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
640 | break; | |
641 | } | |
642 | ||
643 | kfree_skb(skb); | |
644 | } | |
645 | ||
646 | static void ieee80211_mesh_work(struct work_struct *work) | |
647 | { | |
648 | struct ieee80211_sub_if_data *sdata = | |
649 | container_of(work, struct ieee80211_sub_if_data, u.mesh.work); | |
650 | struct ieee80211_local *local = sdata->local; | |
651 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
652 | struct sk_buff *skb; | |
653 | ||
654 | if (!netif_running(sdata->dev)) | |
655 | return; | |
656 | ||
fbe9c429 | 657 | if (local->scanning) |
472dbc45 JB |
658 | return; |
659 | ||
660 | while ((skb = skb_dequeue(&ifmsh->skb_queue))) | |
661 | ieee80211_mesh_rx_queued_mgmt(sdata, skb); | |
662 | ||
663 | if (ifmsh->preq_queue_len && | |
664 | time_after(jiffies, | |
665 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
666 | mesh_path_start_discovery(sdata); | |
667 | ||
18889231 JC |
668 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
669 | mesh_mpath_table_grow(); | |
670 | ||
671 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) | |
672 | mesh_mpp_table_grow(); | |
673 | ||
674 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 675 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
676 | |
677 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
678 | ieee80211_mesh_rootpath(sdata); | |
472dbc45 JB |
679 | } |
680 | ||
681 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
682 | { | |
683 | struct ieee80211_sub_if_data *sdata; | |
684 | ||
685 | rcu_read_lock(); | |
686 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
687 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c03e20fc | 688 | ieee80211_queue_work(&local->hw, &sdata->u.mesh.work); |
472dbc45 JB |
689 | rcu_read_unlock(); |
690 | } | |
691 | ||
902acc78 JB |
692 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
693 | { | |
472dbc45 JB |
694 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
695 | ||
696 | INIT_WORK(&ifmsh->work, ieee80211_mesh_work); | |
697 | setup_timer(&ifmsh->housekeeping_timer, | |
698 | ieee80211_mesh_housekeeping_timer, | |
699 | (unsigned long) sdata); | |
700 | skb_queue_head_init(&sdata->u.mesh.skb_queue); | |
701 | ||
702 | ifmsh->mshcfg.dot11MeshRetryTimeout = MESH_RET_T; | |
703 | ifmsh->mshcfg.dot11MeshConfirmTimeout = MESH_CONF_T; | |
704 | ifmsh->mshcfg.dot11MeshHoldingTimeout = MESH_HOLD_T; | |
705 | ifmsh->mshcfg.dot11MeshMaxRetries = MESH_MAX_RETR; | |
706 | ifmsh->mshcfg.dot11MeshTTL = MESH_TTL; | |
707 | ifmsh->mshcfg.auto_open_plinks = true; | |
708 | ifmsh->mshcfg.dot11MeshMaxPeerLinks = | |
902acc78 | 709 | MESH_MAX_ESTAB_PLINKS; |
472dbc45 | 710 | ifmsh->mshcfg.dot11MeshHWMPactivePathTimeout = |
902acc78 | 711 | MESH_PATH_TIMEOUT; |
472dbc45 | 712 | ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval = |
902acc78 | 713 | MESH_PREQ_MIN_INT; |
472dbc45 | 714 | ifmsh->mshcfg.dot11MeshHWMPnetDiameterTraversalTime = |
902acc78 | 715 | MESH_DIAM_TRAVERSAL_TIME; |
472dbc45 | 716 | ifmsh->mshcfg.dot11MeshHWMPmaxPREQretries = |
902acc78 | 717 | MESH_MAX_PREQ_RETRIES; |
472dbc45 | 718 | ifmsh->mshcfg.path_refresh_time = |
902acc78 | 719 | MESH_PATH_REFRESH_TIME; |
472dbc45 | 720 | ifmsh->mshcfg.min_discovery_timeout = |
902acc78 | 721 | MESH_MIN_DISCOVERY_TIMEOUT; |
472dbc45 JB |
722 | ifmsh->accepting_plinks = true; |
723 | ifmsh->preq_id = 0; | |
d19b3bf6 | 724 | ifmsh->sn = 0; |
472dbc45 | 725 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 726 | mesh_rmc_init(sdata); |
472dbc45 | 727 | ifmsh->last_preq = jiffies; |
902acc78 JB |
728 | /* Allocate all mesh structures when creating the first mesh interface. */ |
729 | if (!mesh_allocated) | |
730 | ieee80211s_init(); | |
472dbc45 JB |
731 | mesh_ids_set_default(ifmsh); |
732 | setup_timer(&ifmsh->mesh_path_timer, | |
902acc78 JB |
733 | ieee80211_mesh_path_timer, |
734 | (unsigned long) sdata); | |
e304bfd3 RP |
735 | setup_timer(&ifmsh->mesh_path_root_timer, |
736 | ieee80211_mesh_path_root_timer, | |
737 | (unsigned long) sdata); | |
472dbc45 JB |
738 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
739 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
740 | } | |
741 | ||
742 | ieee80211_rx_result | |
f1d58c25 | 743 | ieee80211_mesh_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
472dbc45 JB |
744 | { |
745 | struct ieee80211_local *local = sdata->local; | |
746 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
747 | struct ieee80211_mgmt *mgmt; | |
748 | u16 fc; | |
749 | ||
750 | if (skb->len < 24) | |
751 | return RX_DROP_MONITOR; | |
752 | ||
753 | mgmt = (struct ieee80211_mgmt *) skb->data; | |
754 | fc = le16_to_cpu(mgmt->frame_control); | |
755 | ||
756 | switch (fc & IEEE80211_FCTL_STYPE) { | |
a43816df JB |
757 | case IEEE80211_STYPE_ACTION: |
758 | if (skb->len < IEEE80211_MIN_ACTION_SIZE) | |
759 | return RX_DROP_MONITOR; | |
760 | /* fall through */ | |
472dbc45 JB |
761 | case IEEE80211_STYPE_PROBE_RESP: |
762 | case IEEE80211_STYPE_BEACON: | |
472dbc45 | 763 | skb_queue_tail(&ifmsh->skb_queue, skb); |
c03e20fc | 764 | ieee80211_queue_work(&local->hw, &ifmsh->work); |
472dbc45 JB |
765 | return RX_QUEUED; |
766 | } | |
767 | ||
768 | return RX_CONTINUE; | |
902acc78 | 769 | } |