Commit | Line | Data |
---|---|---|
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 | ||
3491707a RP |
16 | #define MESHCONF_CAPAB_ACCEPT_PLINKS 0x01 |
17 | #define MESHCONF_CAPAB_FORWARDING 0x08 | |
2e3c8736 | 18 | |
5bb644a0 JB |
19 | #define TMR_RUNNING_HK 0 |
20 | #define TMR_RUNNING_MP 1 | |
e304bfd3 | 21 | #define TMR_RUNNING_MPR 2 |
5bb644a0 | 22 | |
2e3c8736 LCC |
23 | int mesh_allocated; |
24 | static struct kmem_cache *rm_cache; | |
25 | ||
25d49e4d TP |
26 | #ifdef CONFIG_MAC80211_MESH |
27 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
28 | { | |
29 | return (mgmt->u.action.u.mesh_action.action_code == | |
30 | WLAN_MESH_ACTION_HWMP_PATH_SELECTION); | |
31 | } | |
32 | #else | |
33 | bool mesh_action_is_path_sel(struct ieee80211_mgmt *mgmt) | |
34 | { return false; } | |
35 | #endif | |
36 | ||
2e3c8736 LCC |
37 | void ieee80211s_init(void) |
38 | { | |
39 | mesh_pathtbl_init(); | |
40 | mesh_allocated = 1; | |
41 | rm_cache = kmem_cache_create("mesh_rmc", sizeof(struct rmc_entry), | |
42 | 0, 0, NULL); | |
43 | } | |
44 | ||
45 | void ieee80211s_stop(void) | |
46 | { | |
47 | mesh_pathtbl_unregister(); | |
48 | kmem_cache_destroy(rm_cache); | |
49 | } | |
50 | ||
472dbc45 JB |
51 | static void ieee80211_mesh_housekeeping_timer(unsigned long data) |
52 | { | |
53 | struct ieee80211_sub_if_data *sdata = (void *) data; | |
54 | struct ieee80211_local *local = sdata->local; | |
55 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
56 | ||
6b9ac442 | 57 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
5bb644a0 JB |
58 | |
59 | if (local->quiescing) { | |
60 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
61 | return; | |
62 | } | |
63 | ||
64592c8f | 64 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
65 | } |
66 | ||
2e3c8736 LCC |
67 | /** |
68 | * mesh_matches_local - check if the config of a mesh point matches ours | |
69 | * | |
70 | * @ie: information elements of a management frame from the mesh peer | |
f698d856 | 71 | * @sdata: local mesh subif |
2e3c8736 LCC |
72 | * |
73 | * This function checks if the mesh configuration of a mesh point matches the | |
74 | * local mesh configuration, i.e. if both nodes belong to the same mesh network. | |
75 | */ | |
f698d856 | 76 | bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 77 | { |
472dbc45 | 78 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
739522ba | 79 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 80 | |
2e3c8736 LCC |
81 | /* |
82 | * As support for each feature is added, check for matching | |
83 | * - On mesh config capabilities | |
84 | * - Power Save Support En | |
85 | * - Sync support enabled | |
86 | * - Sync support active | |
87 | * - Sync support required from peer | |
88 | * - MDA enabled | |
89 | * - Power management control on fc | |
90 | */ | |
739522ba TP |
91 | if (!(ifmsh->mesh_id_len == ie->mesh_id_len && |
92 | memcmp(ifmsh->mesh_id, ie->mesh_id, ie->mesh_id_len) == 0 && | |
93 | (ifmsh->mesh_pp_id == ie->mesh_config->meshconf_psel) && | |
94 | (ifmsh->mesh_pm_id == ie->mesh_config->meshconf_pmetric) && | |
95 | (ifmsh->mesh_cc_id == ie->mesh_config->meshconf_congest) && | |
96 | (ifmsh->mesh_sp_id == ie->mesh_config->meshconf_synch) && | |
97 | (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth))) | |
98 | goto mismatch; | |
99 | ||
100 | /* disallow peering with mismatched channel types for now */ | |
101 | if (ie->ht_info_elem && | |
102 | (local->_oper_channel_type != | |
103 | ieee80211_ht_info_to_channel_type(ie->ht_info_elem))) | |
104 | goto mismatch; | |
2e3c8736 | 105 | |
739522ba TP |
106 | return true; |
107 | mismatch: | |
2e3c8736 LCC |
108 | return false; |
109 | } | |
110 | ||
111 | /** | |
112 | * mesh_peer_accepts_plinks - check if an mp is willing to establish peer links | |
113 | * | |
114 | * @ie: information elements of a management frame from the mesh peer | |
2e3c8736 | 115 | */ |
f698d856 | 116 | bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie) |
2e3c8736 | 117 | { |
136cfa28 | 118 | return (ie->mesh_config->meshconf_cap & |
3491707a | 119 | MESHCONF_CAPAB_ACCEPT_PLINKS) != 0; |
2e3c8736 LCC |
120 | } |
121 | ||
122 | /** | |
123 | * mesh_accept_plinks_update: update accepting_plink in local mesh beacons | |
124 | * | |
d0709a65 | 125 | * @sdata: mesh interface in which mesh beacons are going to be updated |
2e3c8736 | 126 | */ |
d0709a65 | 127 | void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 128 | { |
2e3c8736 LCC |
129 | bool free_plinks; |
130 | ||
131 | /* In case mesh_plink_free_count > 0 and mesh_plinktbl_capacity == 0, | |
132 | * the mesh interface might be able to establish plinks with peers that | |
b4e08ea1 LCC |
133 | * are already on the table but are not on PLINK_ESTAB state. However, |
134 | * in general the mesh interface is not accepting peer link requests | |
135 | * from new peers, and that must be reflected in the beacon | |
2e3c8736 LCC |
136 | */ |
137 | free_plinks = mesh_plink_availables(sdata); | |
138 | ||
472dbc45 JB |
139 | if (free_plinks != sdata->u.mesh.accepting_plinks) |
140 | ieee80211_mesh_housekeeping_timer((unsigned long) sdata); | |
2e3c8736 LCC |
141 | } |
142 | ||
f698d856 | 143 | int mesh_rmc_init(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 144 | { |
2e3c8736 LCC |
145 | int i; |
146 | ||
472dbc45 JB |
147 | sdata->u.mesh.rmc = kmalloc(sizeof(struct mesh_rmc), GFP_KERNEL); |
148 | if (!sdata->u.mesh.rmc) | |
2e3c8736 | 149 | return -ENOMEM; |
472dbc45 | 150 | sdata->u.mesh.rmc->idx_mask = RMC_BUCKETS - 1; |
2e3c8736 | 151 | for (i = 0; i < RMC_BUCKETS; i++) |
472dbc45 | 152 | INIT_LIST_HEAD(&sdata->u.mesh.rmc->bucket[i].list); |
2e3c8736 LCC |
153 | return 0; |
154 | } | |
155 | ||
f698d856 | 156 | void mesh_rmc_free(struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 157 | { |
472dbc45 | 158 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
159 | struct rmc_entry *p, *n; |
160 | int i; | |
161 | ||
472dbc45 | 162 | if (!sdata->u.mesh.rmc) |
2e3c8736 LCC |
163 | return; |
164 | ||
165 | for (i = 0; i < RMC_BUCKETS; i++) | |
166 | list_for_each_entry_safe(p, n, &rmc->bucket[i].list, list) { | |
167 | list_del(&p->list); | |
168 | kmem_cache_free(rm_cache, p); | |
169 | } | |
170 | ||
171 | kfree(rmc); | |
472dbc45 | 172 | sdata->u.mesh.rmc = NULL; |
2e3c8736 LCC |
173 | } |
174 | ||
175 | /** | |
176 | * mesh_rmc_check - Check frame in recent multicast cache and add if absent. | |
177 | * | |
178 | * @sa: source address | |
179 | * @mesh_hdr: mesh_header | |
180 | * | |
181 | * Returns: 0 if the frame is not in the cache, nonzero otherwise. | |
182 | * | |
183 | * Checks using the source address and the mesh sequence number if we have | |
184 | * received this frame lately. If the frame is not in the cache, it is added to | |
185 | * it. | |
186 | */ | |
187 | int mesh_rmc_check(u8 *sa, struct ieee80211s_hdr *mesh_hdr, | |
f698d856 | 188 | struct ieee80211_sub_if_data *sdata) |
2e3c8736 | 189 | { |
472dbc45 | 190 | struct mesh_rmc *rmc = sdata->u.mesh.rmc; |
2e3c8736 LCC |
191 | u32 seqnum = 0; |
192 | int entries = 0; | |
193 | u8 idx; | |
194 | struct rmc_entry *p, *n; | |
195 | ||
196 | /* Don't care about endianness since only match matters */ | |
51ceddad LCC |
197 | memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum)); |
198 | idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask; | |
2e3c8736 LCC |
199 | list_for_each_entry_safe(p, n, &rmc->bucket[idx].list, list) { |
200 | ++entries; | |
201 | if (time_after(jiffies, p->exp_time) || | |
202 | (entries == RMC_QUEUE_MAX_LEN)) { | |
203 | list_del(&p->list); | |
204 | kmem_cache_free(rm_cache, p); | |
205 | --entries; | |
f64f9e71 | 206 | } else if ((seqnum == p->seqnum) && |
888d04df | 207 | (compare_ether_addr(sa, p->sa) == 0)) |
2e3c8736 LCC |
208 | return -1; |
209 | } | |
210 | ||
211 | p = kmem_cache_alloc(rm_cache, GFP_ATOMIC); | |
d15b8459 | 212 | if (!p) |
2e3c8736 | 213 | return 0; |
d15b8459 | 214 | |
2e3c8736 LCC |
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 | ||
082ebb0c TP |
222 | int |
223 | mesh_add_meshconf_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
224 | { | |
225 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
226 | u8 *pos, neighbors; | |
227 | u8 meshconf_len = sizeof(struct ieee80211_meshconf_ie); | |
228 | ||
229 | if (skb_tailroom(skb) < 2 + meshconf_len) | |
230 | return -ENOMEM; | |
231 | ||
232 | pos = skb_put(skb, 2 + meshconf_len); | |
233 | *pos++ = WLAN_EID_MESH_CONFIG; | |
234 | *pos++ = meshconf_len; | |
235 | ||
236 | /* Active path selection protocol ID */ | |
237 | *pos++ = ifmsh->mesh_pp_id; | |
238 | /* Active path selection metric ID */ | |
239 | *pos++ = ifmsh->mesh_pm_id; | |
240 | /* Congestion control mode identifier */ | |
241 | *pos++ = ifmsh->mesh_cc_id; | |
242 | /* Synchronization protocol identifier */ | |
243 | *pos++ = ifmsh->mesh_sp_id; | |
244 | /* Authentication Protocol identifier */ | |
245 | *pos++ = ifmsh->mesh_auth_id; | |
246 | /* Mesh Formation Info - number of neighbors */ | |
247 | neighbors = atomic_read(&ifmsh->mshstats.estab_plinks); | |
248 | /* Number of neighbor mesh STAs or 15 whichever is smaller */ | |
249 | neighbors = (neighbors > 15) ? 15 : neighbors; | |
250 | *pos++ = neighbors << 1; | |
251 | /* Mesh capability */ | |
252 | ifmsh->accepting_plinks = mesh_plink_availables(sdata); | |
253 | *pos = MESHCONF_CAPAB_FORWARDING; | |
254 | *pos++ |= ifmsh->accepting_plinks ? | |
255 | MESHCONF_CAPAB_ACCEPT_PLINKS : 0x00; | |
256 | *pos++ = 0x00; | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | int | |
262 | mesh_add_meshid_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
263 | { | |
264 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
265 | u8 *pos; | |
266 | ||
267 | if (skb_tailroom(skb) < 2 + ifmsh->mesh_id_len) | |
268 | return -ENOMEM; | |
269 | ||
270 | pos = skb_put(skb, 2 + ifmsh->mesh_id_len); | |
271 | *pos++ = WLAN_EID_MESH_ID; | |
272 | *pos++ = ifmsh->mesh_id_len; | |
273 | if (ifmsh->mesh_id_len) | |
274 | memcpy(pos, ifmsh->mesh_id, ifmsh->mesh_id_len); | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | int | |
280 | mesh_add_vendor_ies(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
281 | { | |
282 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
283 | u8 offset, len; | |
284 | const u8 *data; | |
285 | ||
286 | if (!ifmsh->ie || !ifmsh->ie_len) | |
287 | return 0; | |
288 | ||
289 | /* fast-forward to vendor IEs */ | |
290 | offset = ieee80211_ie_split_vendor(ifmsh->ie, ifmsh->ie_len, 0); | |
291 | ||
292 | if (offset) { | |
293 | len = ifmsh->ie_len - offset; | |
294 | data = ifmsh->ie + offset; | |
295 | if (skb_tailroom(skb) < len) | |
296 | return -ENOMEM; | |
297 | memcpy(skb_put(skb, len), data, len); | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | int | |
304 | mesh_add_rsn_ie(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata) | |
305 | { | |
306 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
307 | u8 len = 0; | |
308 | const u8 *data; | |
309 | ||
310 | if (!ifmsh->ie || !ifmsh->ie_len) | |
311 | return 0; | |
312 | ||
313 | /* find RSN IE */ | |
314 | data = ifmsh->ie; | |
315 | while (data < ifmsh->ie + ifmsh->ie_len) { | |
316 | if (*data == WLAN_EID_RSN) { | |
317 | len = data[1] + 2; | |
318 | break; | |
319 | } | |
320 | data++; | |
321 | } | |
322 | ||
323 | if (len) { | |
324 | if (skb_tailroom(skb) < len) | |
325 | return -ENOMEM; | |
326 | memcpy(skb_put(skb, len), data, len); | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
082ebb0c TP |
332 | int mesh_add_ds_params_ie(struct sk_buff *skb, |
333 | struct ieee80211_sub_if_data *sdata) | |
334 | { | |
335 | struct ieee80211_local *local = sdata->local; | |
336 | struct ieee80211_supported_band *sband; | |
337 | u8 *pos; | |
2e3c8736 | 338 | |
082ebb0c TP |
339 | if (skb_tailroom(skb) < 3) |
340 | return -ENOMEM; | |
341 | ||
342 | sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; | |
be125c60 RP |
343 | if (sband->band == IEEE80211_BAND_2GHZ) { |
344 | pos = skb_put(skb, 2 + 1); | |
345 | *pos++ = WLAN_EID_DS_PARAMS; | |
346 | *pos++ = 1; | |
347 | *pos++ = ieee80211_frequency_to_channel(local->hw.conf.channel->center_freq); | |
348 | } | |
349 | ||
082ebb0c | 350 | return 0; |
2e3c8736 LCC |
351 | } |
352 | ||
176f3608 TP |
353 | int mesh_add_ht_cap_ie(struct sk_buff *skb, |
354 | struct ieee80211_sub_if_data *sdata) | |
355 | { | |
356 | struct ieee80211_local *local = sdata->local; | |
357 | struct ieee80211_supported_band *sband; | |
358 | u8 *pos; | |
359 | ||
360 | sband = local->hw.wiphy->bands[local->oper_channel->band]; | |
361 | if (!sband->ht_cap.ht_supported || | |
362 | local->_oper_channel_type == NL80211_CHAN_NO_HT) | |
363 | return 0; | |
364 | ||
365 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) | |
366 | return -ENOMEM; | |
367 | ||
368 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); | |
ef96a842 | 369 | ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); |
176f3608 TP |
370 | |
371 | return 0; | |
372 | } | |
373 | ||
374 | int mesh_add_ht_info_ie(struct sk_buff *skb, | |
375 | struct ieee80211_sub_if_data *sdata) | |
376 | { | |
377 | struct ieee80211_local *local = sdata->local; | |
378 | struct ieee80211_channel *channel = local->oper_channel; | |
379 | enum nl80211_channel_type channel_type = local->_oper_channel_type; | |
380 | struct ieee80211_supported_band *sband = | |
381 | local->hw.wiphy->bands[channel->band]; | |
382 | struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap; | |
383 | u8 *pos; | |
384 | ||
385 | if (!ht_cap->ht_supported || channel_type == NL80211_CHAN_NO_HT) | |
386 | return 0; | |
387 | ||
388 | if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_info)) | |
389 | return -ENOMEM; | |
390 | ||
391 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_info)); | |
392 | ieee80211_ie_build_ht_info(pos, ht_cap, channel, channel_type); | |
393 | ||
394 | return 0; | |
395 | } | |
2e3c8736 LCC |
396 | static void ieee80211_mesh_path_timer(unsigned long data) |
397 | { | |
398 | struct ieee80211_sub_if_data *sdata = | |
399 | (struct ieee80211_sub_if_data *) data; | |
472dbc45 | 400 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
133b8226 | 401 | struct ieee80211_local *local = sdata->local; |
2e3c8736 | 402 | |
5bb644a0 JB |
403 | if (local->quiescing) { |
404 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
405 | return; | |
406 | } | |
407 | ||
64592c8f | 408 | ieee80211_queue_work(&local->hw, &sdata->work); |
2e3c8736 LCC |
409 | } |
410 | ||
e304bfd3 RP |
411 | static void ieee80211_mesh_path_root_timer(unsigned long data) |
412 | { | |
413 | struct ieee80211_sub_if_data *sdata = | |
414 | (struct ieee80211_sub_if_data *) data; | |
415 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
416 | struct ieee80211_local *local = sdata->local; | |
417 | ||
418 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
419 | ||
420 | if (local->quiescing) { | |
421 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
422 | return; | |
423 | } | |
424 | ||
64592c8f | 425 | ieee80211_queue_work(&local->hw, &sdata->work); |
e304bfd3 RP |
426 | } |
427 | ||
63c5723b RP |
428 | void ieee80211_mesh_root_setup(struct ieee80211_if_mesh *ifmsh) |
429 | { | |
430 | if (ifmsh->mshcfg.dot11MeshHWMPRootMode) | |
431 | set_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
432 | else { | |
433 | clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags); | |
434 | /* stop running timer */ | |
435 | del_timer_sync(&ifmsh->mesh_path_root_timer); | |
436 | } | |
437 | } | |
438 | ||
3c5772a5 JC |
439 | /** |
440 | * ieee80211_fill_mesh_addresses - fill addresses of a locally originated mesh frame | |
441 | * @hdr: 802.11 frame header | |
442 | * @fc: frame control field | |
443 | * @meshda: destination address in the mesh | |
444 | * @meshsa: source address address in the mesh. Same as TA, as frame is | |
445 | * locally originated. | |
446 | * | |
447 | * Return the length of the 802.11 (does not include a mesh control header) | |
448 | */ | |
15ff6365 JB |
449 | int ieee80211_fill_mesh_addresses(struct ieee80211_hdr *hdr, __le16 *fc, |
450 | const u8 *meshda, const u8 *meshsa) | |
451 | { | |
3c5772a5 JC |
452 | if (is_multicast_ether_addr(meshda)) { |
453 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
454 | /* DA TA SA */ | |
455 | memcpy(hdr->addr1, meshda, ETH_ALEN); | |
456 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
457 | memcpy(hdr->addr3, meshsa, ETH_ALEN); | |
458 | return 24; | |
459 | } else { | |
2154c81c | 460 | *fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
3c5772a5 JC |
461 | /* RA TA DA SA */ |
462 | memset(hdr->addr1, 0, ETH_ALEN); /* RA is resolved later */ | |
463 | memcpy(hdr->addr2, meshsa, ETH_ALEN); | |
464 | memcpy(hdr->addr3, meshda, ETH_ALEN); | |
465 | memcpy(hdr->addr4, meshsa, ETH_ALEN); | |
466 | return 30; | |
467 | } | |
468 | } | |
469 | ||
902acc78 JB |
470 | /** |
471 | * ieee80211_new_mesh_header - create a new mesh header | |
472 | * @meshhdr: uninitialized mesh header | |
473 | * @sdata: mesh interface to be used | |
61ad5394 JC |
474 | * @addr4or5: 1st address in the ae header, which may correspond to address 4 |
475 | * (if addr6 is NULL) or address 5 (if addr6 is present). It may | |
476 | * be NULL. | |
477 | * @addr6: 2nd address in the ae header, which corresponds to addr6 of the | |
478 | * mesh frame | |
902acc78 JB |
479 | * |
480 | * Return the header length. | |
481 | */ | |
482 | int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr, | |
61ad5394 JC |
483 | struct ieee80211_sub_if_data *sdata, char *addr4or5, |
484 | char *addr6) | |
902acc78 | 485 | { |
3c5772a5 | 486 | int aelen = 0; |
61ad5394 | 487 | BUG_ON(!addr4or5 && addr6); |
0c3cee72 | 488 | memset(meshhdr, 0, sizeof(*meshhdr)); |
472dbc45 JB |
489 | meshhdr->ttl = sdata->u.mesh.mshcfg.dot11MeshTTL; |
490 | put_unaligned(cpu_to_le32(sdata->u.mesh.mesh_seqnum), &meshhdr->seqnum); | |
491 | sdata->u.mesh.mesh_seqnum++; | |
61ad5394 | 492 | if (addr4or5 && !addr6) { |
3c5772a5 JC |
493 | meshhdr->flags |= MESH_FLAGS_AE_A4; |
494 | aelen += ETH_ALEN; | |
61ad5394 JC |
495 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
496 | } else if (addr4or5 && addr6) { | |
3c5772a5 JC |
497 | meshhdr->flags |= MESH_FLAGS_AE_A5_A6; |
498 | aelen += 2 * ETH_ALEN; | |
61ad5394 JC |
499 | memcpy(meshhdr->eaddr1, addr4or5, ETH_ALEN); |
500 | memcpy(meshhdr->eaddr2, addr6, ETH_ALEN); | |
3c5772a5 JC |
501 | } |
502 | return 6 + aelen; | |
902acc78 JB |
503 | } |
504 | ||
472dbc45 JB |
505 | static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata, |
506 | struct ieee80211_if_mesh *ifmsh) | |
507 | { | |
508 | bool free_plinks; | |
509 | ||
510 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
511 | printk(KERN_DEBUG "%s: running mesh housekeeping\n", | |
47846c9b | 512 | sdata->name); |
472dbc45 JB |
513 | #endif |
514 | ||
515 | ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT); | |
516 | mesh_path_expire(sdata); | |
517 | ||
518 | free_plinks = mesh_plink_availables(sdata); | |
519 | if (free_plinks != sdata->u.mesh.accepting_plinks) | |
2d0ddec5 | 520 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
472dbc45 | 521 | |
472dbc45 JB |
522 | mod_timer(&ifmsh->housekeeping_timer, |
523 | round_jiffies(jiffies + IEEE80211_MESH_HOUSEKEEPING_INTERVAL)); | |
524 | } | |
525 | ||
e304bfd3 RP |
526 | static void ieee80211_mesh_rootpath(struct ieee80211_sub_if_data *sdata) |
527 | { | |
528 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
529 | ||
530 | mesh_path_tx_root_frame(sdata); | |
531 | mod_timer(&ifmsh->mesh_path_root_timer, | |
c6133661 TP |
532 | round_jiffies(TU_TO_EXP_TIME( |
533 | ifmsh->mshcfg.dot11MeshHWMPRannInterval))); | |
e304bfd3 RP |
534 | } |
535 | ||
5bb644a0 JB |
536 | #ifdef CONFIG_PM |
537 | void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata) | |
538 | { | |
539 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
540 | ||
5ee68e5b | 541 | /* use atomic bitops in case all timers fire at the same time */ |
5bb644a0 JB |
542 | |
543 | if (del_timer_sync(&ifmsh->housekeeping_timer)) | |
544 | set_bit(TMR_RUNNING_HK, &ifmsh->timers_running); | |
545 | if (del_timer_sync(&ifmsh->mesh_path_timer)) | |
546 | set_bit(TMR_RUNNING_MP, &ifmsh->timers_running); | |
e304bfd3 RP |
547 | if (del_timer_sync(&ifmsh->mesh_path_root_timer)) |
548 | set_bit(TMR_RUNNING_MPR, &ifmsh->timers_running); | |
5bb644a0 JB |
549 | } |
550 | ||
551 | void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata) | |
552 | { | |
553 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
554 | ||
555 | if (test_and_clear_bit(TMR_RUNNING_HK, &ifmsh->timers_running)) | |
556 | add_timer(&ifmsh->housekeeping_timer); | |
557 | if (test_and_clear_bit(TMR_RUNNING_MP, &ifmsh->timers_running)) | |
558 | add_timer(&ifmsh->mesh_path_timer); | |
e304bfd3 RP |
559 | if (test_and_clear_bit(TMR_RUNNING_MPR, &ifmsh->timers_running)) |
560 | add_timer(&ifmsh->mesh_path_root_timer); | |
63c5723b | 561 | ieee80211_mesh_root_setup(ifmsh); |
5bb644a0 JB |
562 | } |
563 | #endif | |
472dbc45 JB |
564 | |
565 | void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata) | |
566 | { | |
567 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
568 | struct ieee80211_local *local = sdata->local; | |
569 | ||
09b17470 JB |
570 | local->fif_other_bss++; |
571 | /* mesh ifaces must set allmulti to forward mcast traffic */ | |
572 | atomic_inc(&local->iff_allmultis); | |
573 | ieee80211_configure_filter(local); | |
574 | ||
c7108a71 JC |
575 | ifmsh->mesh_cc_id = 0; /* Disabled */ |
576 | ifmsh->mesh_sp_id = 0; /* Neighbor Offset */ | |
577 | ifmsh->mesh_auth_id = 0; /* Disabled */ | |
6b9ac442 | 578 | set_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags); |
63c5723b | 579 | ieee80211_mesh_root_setup(ifmsh); |
64592c8f | 580 | ieee80211_queue_work(&local->hw, &sdata->work); |
5b365834 | 581 | sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL; |
2d0ddec5 | 582 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON | |
5b365834 JC |
583 | BSS_CHANGED_BEACON_ENABLED | |
584 | BSS_CHANGED_BEACON_INT); | |
472dbc45 JB |
585 | } |
586 | ||
587 | void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) | |
588 | { | |
09b17470 | 589 | struct ieee80211_local *local = sdata->local; |
29cbe68c JB |
590 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
591 | ||
592 | ifmsh->mesh_id_len = 0; | |
593 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); | |
594 | sta_info_flush(local, NULL); | |
09b17470 | 595 | |
472dbc45 | 596 | del_timer_sync(&sdata->u.mesh.housekeeping_timer); |
e304bfd3 | 597 | del_timer_sync(&sdata->u.mesh.mesh_path_root_timer); |
b7413430 JB |
598 | /* |
599 | * If the timer fired while we waited for it, it will have | |
600 | * requeued the work. Now the work will be running again | |
601 | * but will not rearm the timer again because it checks | |
602 | * whether the interface is running, which, at this point, | |
603 | * it no longer is. | |
604 | */ | |
64592c8f | 605 | cancel_work_sync(&sdata->work); |
09b17470 JB |
606 | |
607 | local->fif_other_bss--; | |
608 | atomic_dec(&local->iff_allmultis); | |
609 | ieee80211_configure_filter(local); | |
472dbc45 JB |
610 | } |
611 | ||
612 | static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, | |
613 | u16 stype, | |
614 | struct ieee80211_mgmt *mgmt, | |
615 | size_t len, | |
616 | struct ieee80211_rx_status *rx_status) | |
617 | { | |
c6a1fa12 | 618 | struct ieee80211_local *local = sdata->local; |
472dbc45 JB |
619 | struct ieee802_11_elems elems; |
620 | struct ieee80211_channel *channel; | |
881d948c | 621 | u32 supp_rates = 0; |
472dbc45 JB |
622 | size_t baselen; |
623 | int freq; | |
624 | enum ieee80211_band band = rx_status->band; | |
625 | ||
626 | /* ignore ProbeResp to foreign address */ | |
627 | if (stype == IEEE80211_STYPE_PROBE_RESP && | |
47846c9b | 628 | compare_ether_addr(mgmt->da, sdata->vif.addr)) |
472dbc45 JB |
629 | return; |
630 | ||
631 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; | |
632 | if (baselen > len) | |
633 | return; | |
634 | ||
635 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, | |
636 | &elems); | |
637 | ||
5cff5e01 | 638 | /* ignore beacons from secure mesh peers if our security is off */ |
b130e5ce | 639 | if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) |
5cff5e01 JC |
640 | return; |
641 | ||
472dbc45 | 642 | if (elems.ds_params && elems.ds_params_len == 1) |
59eb21a6 | 643 | freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); |
472dbc45 JB |
644 | else |
645 | freq = rx_status->freq; | |
646 | ||
647 | channel = ieee80211_get_channel(local->hw.wiphy, freq); | |
648 | ||
649 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) | |
650 | return; | |
651 | ||
652 | if (elems.mesh_id && elems.mesh_config && | |
653 | mesh_matches_local(&elems, sdata)) { | |
654 | supp_rates = ieee80211_sta_get_rates(local, &elems, band); | |
1570ca59 | 655 | mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems); |
472dbc45 JB |
656 | } |
657 | } | |
658 | ||
659 | static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, | |
660 | struct ieee80211_mgmt *mgmt, | |
661 | size_t len, | |
662 | struct ieee80211_rx_status *rx_status) | |
663 | { | |
664 | switch (mgmt->u.action.category) { | |
8db09850 TP |
665 | case WLAN_CATEGORY_SELF_PROTECTED: |
666 | switch (mgmt->u.action.u.self_prot.action_code) { | |
667 | case WLAN_SP_MESH_PEERING_OPEN: | |
668 | case WLAN_SP_MESH_PEERING_CLOSE: | |
669 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
670 | mesh_rx_plink_frame(sdata, mgmt, len, rx_status); | |
671 | break; | |
672 | } | |
472dbc45 | 673 | break; |
25d49e4d TP |
674 | case WLAN_CATEGORY_MESH_ACTION: |
675 | if (mesh_action_is_path_sel(mgmt)) | |
676 | mesh_rx_path_sel_frame(sdata, mgmt, len); | |
472dbc45 JB |
677 | break; |
678 | } | |
679 | } | |
680 | ||
1fa57d01 JB |
681 | void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
682 | struct sk_buff *skb) | |
472dbc45 JB |
683 | { |
684 | struct ieee80211_rx_status *rx_status; | |
472dbc45 JB |
685 | struct ieee80211_mgmt *mgmt; |
686 | u16 stype; | |
687 | ||
f1d58c25 | 688 | rx_status = IEEE80211_SKB_RXCB(skb); |
472dbc45 JB |
689 | mgmt = (struct ieee80211_mgmt *) skb->data; |
690 | stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; | |
691 | ||
692 | switch (stype) { | |
693 | case IEEE80211_STYPE_PROBE_RESP: | |
694 | case IEEE80211_STYPE_BEACON: | |
695 | ieee80211_mesh_rx_bcn_presp(sdata, stype, mgmt, skb->len, | |
696 | rx_status); | |
697 | break; | |
698 | case IEEE80211_STYPE_ACTION: | |
699 | ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status); | |
700 | break; | |
701 | } | |
472dbc45 JB |
702 | } |
703 | ||
1fa57d01 | 704 | void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata) |
472dbc45 | 705 | { |
472dbc45 | 706 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 JB |
707 | |
708 | if (ifmsh->preq_queue_len && | |
709 | time_after(jiffies, | |
710 | ifmsh->last_preq + msecs_to_jiffies(ifmsh->mshcfg.dot11MeshHWMPpreqMinInterval))) | |
711 | mesh_path_start_discovery(sdata); | |
712 | ||
18889231 JC |
713 | if (test_and_clear_bit(MESH_WORK_GROW_MPATH_TABLE, &ifmsh->wrkq_flags)) |
714 | mesh_mpath_table_grow(); | |
715 | ||
dcac908b | 716 | if (test_and_clear_bit(MESH_WORK_GROW_MPP_TABLE, &ifmsh->wrkq_flags)) |
18889231 JC |
717 | mesh_mpp_table_grow(); |
718 | ||
719 | if (test_and_clear_bit(MESH_WORK_HOUSEKEEPING, &ifmsh->wrkq_flags)) | |
472dbc45 | 720 | ieee80211_mesh_housekeeping(sdata, ifmsh); |
e304bfd3 RP |
721 | |
722 | if (test_and_clear_bit(MESH_WORK_ROOT, &ifmsh->wrkq_flags)) | |
723 | ieee80211_mesh_rootpath(sdata); | |
472dbc45 JB |
724 | } |
725 | ||
726 | void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) | |
727 | { | |
728 | struct ieee80211_sub_if_data *sdata; | |
729 | ||
730 | rcu_read_lock(); | |
731 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
732 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
64592c8f | 733 | ieee80211_queue_work(&local->hw, &sdata->work); |
472dbc45 JB |
734 | rcu_read_unlock(); |
735 | } | |
736 | ||
902acc78 JB |
737 | void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata) |
738 | { | |
472dbc45 JB |
739 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
740 | ||
472dbc45 JB |
741 | setup_timer(&ifmsh->housekeeping_timer, |
742 | ieee80211_mesh_housekeeping_timer, | |
743 | (unsigned long) sdata); | |
472dbc45 | 744 | |
472dbc45 JB |
745 | ifmsh->accepting_plinks = true; |
746 | ifmsh->preq_id = 0; | |
d19b3bf6 | 747 | ifmsh->sn = 0; |
5ee68e5b | 748 | ifmsh->num_gates = 0; |
472dbc45 | 749 | atomic_set(&ifmsh->mpaths, 0); |
f698d856 | 750 | mesh_rmc_init(sdata); |
472dbc45 | 751 | ifmsh->last_preq = jiffies; |
dca7e943 | 752 | ifmsh->next_perr = jiffies; |
902acc78 JB |
753 | /* Allocate all mesh structures when creating the first mesh interface. */ |
754 | if (!mesh_allocated) | |
755 | ieee80211s_init(); | |
472dbc45 | 756 | setup_timer(&ifmsh->mesh_path_timer, |
902acc78 JB |
757 | ieee80211_mesh_path_timer, |
758 | (unsigned long) sdata); | |
e304bfd3 RP |
759 | setup_timer(&ifmsh->mesh_path_root_timer, |
760 | ieee80211_mesh_path_root_timer, | |
761 | (unsigned long) sdata); | |
472dbc45 JB |
762 | INIT_LIST_HEAD(&ifmsh->preq_queue.list); |
763 | spin_lock_init(&ifmsh->mesh_preq_queue_lock); | |
764 | } |