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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
ced72933 | 30 | #include <linux/crc32c.h> |
a73105b8 | 31 | |
dec05074 AQ |
32 | /* hash class keys */ |
33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
35 | ||
56303d34 | 36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 37 | unsigned short vid, |
56303d34 | 38 | struct batadv_orig_node *orig_node); |
a513088d SE |
39 | static void batadv_tt_purge(struct work_struct *work); |
40 | static void | |
56303d34 | 41 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
42 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
43 | struct batadv_orig_node *orig_node, | |
44 | const unsigned char *addr, | |
c018ad3d AQ |
45 | unsigned short vid, const char *message, |
46 | bool roaming); | |
c6c8fea2 | 47 | |
7aadf889 | 48 | /* returns 1 if they are the same mac addr */ |
a513088d | 49 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 50 | { |
56303d34 | 51 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 52 | hash_entry); |
7aadf889 ML |
53 | |
54 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
55 | } | |
56 | ||
c018ad3d AQ |
57 | /** |
58 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
59 | * @data: pointer to the tt_common_entry object to map | |
60 | * @size: the size of the hash table | |
61 | * | |
62 | * Returns the hash index where the object represented by 'data' should be | |
63 | * stored at. | |
64 | */ | |
65 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
66 | { | |
67 | struct batadv_tt_common_entry *tt; | |
68 | uint32_t hash = 0; | |
69 | ||
70 | tt = (struct batadv_tt_common_entry *)data; | |
71 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
72 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
73 | ||
74 | hash += (hash << 3); | |
75 | hash ^= (hash >> 11); | |
76 | hash += (hash << 15); | |
77 | ||
78 | return hash % size; | |
79 | } | |
80 | ||
81 | /** | |
82 | * batadv_tt_hash_find - look for a client in the given hash table | |
83 | * @hash: the hash table to search | |
84 | * @addr: the mac address of the client to look for | |
85 | * @vid: VLAN identifier | |
86 | * | |
87 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
88 | * found, NULL otherwise. | |
89 | */ | |
56303d34 | 90 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
91 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
92 | unsigned short vid) | |
7aadf889 | 93 | { |
7aadf889 | 94 | struct hlist_head *head; |
c018ad3d | 95 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 96 | uint32_t index; |
7aadf889 ML |
97 | |
98 | if (!hash) | |
99 | return NULL; | |
100 | ||
c018ad3d AQ |
101 | memcpy(to_search.addr, addr, ETH_ALEN); |
102 | to_search.vid = vid; | |
103 | ||
104 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
105 | head = &hash->table[index]; |
106 | ||
107 | rcu_read_lock(); | |
c018ad3d AQ |
108 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
109 | if (!batadv_compare_eth(tt, addr)) | |
110 | continue; | |
111 | ||
112 | if (tt->vid != vid) | |
7aadf889 ML |
113 | continue; |
114 | ||
c018ad3d | 115 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
116 | continue; |
117 | ||
c018ad3d | 118 | tt_tmp = tt; |
7aadf889 ML |
119 | break; |
120 | } | |
121 | rcu_read_unlock(); | |
122 | ||
c018ad3d | 123 | return tt_tmp; |
7aadf889 ML |
124 | } |
125 | ||
c018ad3d AQ |
126 | /** |
127 | * batadv_tt_local_hash_find - search the local table for a given client | |
128 | * @bat_priv: the bat priv with all the soft interface information | |
129 | * @addr: the mac address of the client to look for | |
130 | * @vid: VLAN identifier | |
131 | * | |
132 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
133 | * found, NULL otherwise. | |
134 | */ | |
56303d34 | 135 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
136 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
137 | unsigned short vid) | |
7aadf889 | 138 | { |
56303d34 SE |
139 | struct batadv_tt_common_entry *tt_common_entry; |
140 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 141 | |
c018ad3d AQ |
142 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
143 | vid); | |
48100bac AQ |
144 | if (tt_common_entry) |
145 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
146 | struct batadv_tt_local_entry, |
147 | common); | |
48100bac AQ |
148 | return tt_local_entry; |
149 | } | |
7aadf889 | 150 | |
c018ad3d AQ |
151 | /** |
152 | * batadv_tt_global_hash_find - search the global table for a given client | |
153 | * @bat_priv: the bat priv with all the soft interface information | |
154 | * @addr: the mac address of the client to look for | |
155 | * @vid: VLAN identifier | |
156 | * | |
157 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
158 | * is found, NULL otherwise. | |
159 | */ | |
56303d34 | 160 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
161 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
162 | unsigned short vid) | |
48100bac | 163 | { |
56303d34 SE |
164 | struct batadv_tt_common_entry *tt_common_entry; |
165 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 166 | |
c018ad3d AQ |
167 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
168 | vid); | |
48100bac AQ |
169 | if (tt_common_entry) |
170 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
171 | struct batadv_tt_global_entry, |
172 | common); | |
48100bac | 173 | return tt_global_entry; |
7aadf889 ML |
174 | } |
175 | ||
a513088d | 176 | static void |
56303d34 | 177 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 178 | { |
48100bac AQ |
179 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
180 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
181 | } |
182 | ||
21026059 AQ |
183 | /** |
184 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
185 | * tt_global_entry and possibly free it | |
186 | * @tt_global_entry: the object to free | |
187 | */ | |
a513088d | 188 | static void |
56303d34 | 189 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 190 | { |
db08e6e5 | 191 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 192 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 193 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
194 | } |
195 | } | |
196 | ||
a513088d | 197 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 198 | { |
56303d34 | 199 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 200 | |
56303d34 | 201 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
202 | |
203 | /* We are in an rcu callback here, therefore we cannot use | |
204 | * batadv_orig_node_free_ref() and its call_rcu(): | |
205 | * An rcu_barrier() wouldn't wait for that to finish | |
206 | */ | |
207 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
208 | kfree(orig_entry); |
209 | } | |
210 | ||
7ea7b4a1 AQ |
211 | /** |
212 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
213 | * by vid | |
214 | * @bat_priv: the bat priv with all the soft interface information | |
215 | * @vid: the VLAN identifier of the sub-table to change | |
216 | * @v: the amount to sum to the local table size | |
217 | */ | |
218 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
219 | unsigned short vid, int v) | |
220 | { | |
221 | struct batadv_softif_vlan *vlan; | |
222 | ||
223 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
224 | if (!vlan) | |
225 | return; | |
226 | ||
227 | atomic_add(v, &vlan->tt.num_entries); | |
228 | ||
229 | batadv_softif_vlan_free_ref(vlan); | |
230 | } | |
231 | ||
232 | /** | |
233 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
234 | * vid | |
235 | * @bat_priv: the bat priv with all the soft interface information | |
236 | * @vid: the VLAN identifier | |
237 | */ | |
238 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
239 | unsigned short vid) | |
240 | { | |
241 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
242 | } | |
243 | ||
244 | /** | |
245 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
246 | * vid | |
247 | * @bat_priv: the bat priv with all the soft interface information | |
248 | * @vid: the VLAN identifier | |
249 | */ | |
250 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
251 | unsigned short vid) | |
252 | { | |
253 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
254 | } | |
255 | ||
256 | /** | |
257 | * batadv_tt_global_size_mod - change the size by v of the local table | |
258 | * identified by vid | |
259 | * @bat_priv: the bat priv with all the soft interface information | |
260 | * @vid: the VLAN identifier | |
261 | * @v: the amount to sum to the global table size | |
262 | */ | |
263 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
264 | unsigned short vid, int v) | |
265 | { | |
266 | struct batadv_orig_node_vlan *vlan; | |
267 | ||
268 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
269 | if (!vlan) | |
270 | return; | |
271 | ||
272 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
273 | spin_lock_bh(&orig_node->vlan_list_lock); | |
274 | list_del_rcu(&vlan->list); | |
275 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
276 | batadv_orig_node_vlan_free_ref(vlan); | |
277 | } | |
278 | ||
279 | batadv_orig_node_vlan_free_ref(vlan); | |
280 | } | |
281 | ||
282 | /** | |
283 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
284 | * given vid | |
285 | * @orig_node: the originator which global table size has to be decreased | |
286 | * @vid: the vlan identifier | |
287 | */ | |
288 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
289 | unsigned short vid) | |
290 | { | |
291 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
292 | } | |
293 | ||
294 | /** | |
295 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
296 | * given vid | |
297 | * @orig_node: the originator which global table size has to be decreased | |
298 | * @vid: the vlan identifier | |
299 | */ | |
300 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
301 | unsigned short vid) | |
302 | { | |
303 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
304 | } | |
305 | ||
a513088d | 306 | static void |
56303d34 | 307 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 308 | { |
d657e621 AQ |
309 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
310 | return; | |
7ea7b4a1 | 311 | |
a513088d | 312 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
313 | } |
314 | ||
3abe4adb AQ |
315 | /** |
316 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
317 | * @bat_priv: the bat priv with all the soft interface information | |
318 | * @tt_local_entry: the TT entry involved in the event | |
319 | * @event_flags: flags to store in the event structure | |
320 | */ | |
56303d34 | 321 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
322 | struct batadv_tt_local_entry *tt_local_entry, |
323 | uint8_t event_flags) | |
a73105b8 | 324 | { |
56303d34 | 325 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
326 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
327 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
328 | bool event_removed = false; |
329 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
330 | |
331 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
332 | if (!tt_change_node) |
333 | return; | |
334 | ||
ff66c975 | 335 | tt_change_node->change.flags = flags; |
e1bf0c14 | 336 | tt_change_node->change.reserved = 0; |
3abe4adb | 337 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
c018ad3d | 338 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 339 | |
acd34afa | 340 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
341 | |
342 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
343 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
344 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 345 | list) { |
3abe4adb | 346 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
347 | continue; |
348 | ||
349 | /* DEL+ADD in the same orig interval have no effect and can be | |
350 | * removed to avoid silly behaviour on the receiver side. The | |
351 | * other way around (ADD+DEL) can happen in case of roaming of | |
352 | * a client still in the NEW state. Roaming of NEW clients is | |
353 | * now possible due to automatically recognition of "temporary" | |
354 | * clients | |
355 | */ | |
acd34afa | 356 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
357 | if (!del_op_requested && del_op_entry) |
358 | goto del; | |
359 | if (del_op_requested && !del_op_entry) | |
360 | goto del; | |
361 | continue; | |
362 | del: | |
363 | list_del(&entry->list); | |
364 | kfree(entry); | |
155e4e12 | 365 | kfree(tt_change_node); |
3b643de5 AQ |
366 | event_removed = true; |
367 | goto unlock; | |
368 | } | |
369 | ||
a73105b8 | 370 | /* track the change in the OGMinterval list */ |
807736f6 | 371 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
372 | |
373 | unlock: | |
807736f6 | 374 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 375 | |
3b643de5 | 376 | if (event_removed) |
807736f6 | 377 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 378 | else |
807736f6 | 379 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
380 | } |
381 | ||
335fbe0f ML |
382 | /** |
383 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
384 | * @changes_num: number of tt changes | |
385 | * | |
386 | * Returns computed length in bytes. | |
387 | */ | |
388 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 389 | { |
335fbe0f | 390 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
391 | } |
392 | ||
298e6e68 AQ |
393 | /** |
394 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
395 | * @tt_len: available space | |
396 | * | |
397 | * Returns the number of entries. | |
398 | */ | |
399 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
400 | { | |
401 | return tt_len / batadv_tt_len(1); | |
402 | } | |
403 | ||
56303d34 | 404 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 405 | { |
807736f6 | 406 | if (bat_priv->tt.local_hash) |
5346c35e | 407 | return 0; |
c6c8fea2 | 408 | |
807736f6 | 409 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 410 | |
807736f6 | 411 | if (!bat_priv->tt.local_hash) |
5346c35e | 412 | return -ENOMEM; |
c6c8fea2 | 413 | |
dec05074 AQ |
414 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
415 | &batadv_tt_local_hash_lock_class_key); | |
416 | ||
5346c35e | 417 | return 0; |
c6c8fea2 SE |
418 | } |
419 | ||
068ee6e2 AQ |
420 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
421 | struct batadv_tt_global_entry *tt_global, | |
422 | const char *message) | |
423 | { | |
424 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
425 | "Deleting global tt entry %pM (vid: %d): %s\n", |
426 | tt_global->common.addr, | |
427 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
428 | |
429 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 430 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 431 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
432 | } |
433 | ||
c018ad3d AQ |
434 | /** |
435 | * batadv_tt_local_add - add a new client to the local table or update an | |
436 | * existing client | |
437 | * @soft_iface: netdev struct of the mesh interface | |
438 | * @addr: the mac address of the client to add | |
439 | * @vid: VLAN identifier | |
440 | * @ifindex: index of the interface where the client is connected to (useful to | |
441 | * identify wireless clients) | |
442 | */ | |
08c36d3e | 443 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
c018ad3d | 444 | unsigned short vid, int ifindex) |
c6c8fea2 | 445 | { |
56303d34 | 446 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
447 | struct batadv_tt_local_entry *tt_local; |
448 | struct batadv_tt_global_entry *tt_global; | |
db08e6e5 | 449 | struct hlist_head *head; |
56303d34 | 450 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 451 | int hash_added; |
068ee6e2 | 452 | bool roamed_back = false; |
c6c8fea2 | 453 | |
c018ad3d AQ |
454 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
455 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 456 | |
47c94655 AQ |
457 | if (tt_local) { |
458 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
459 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
460 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
461 | "Re-adding pending client %pM (vid: %d)\n", |
462 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
463 | /* whatever the reason why the PENDING flag was set, |
464 | * this is a client which was enqueued to be removed in | |
465 | * this orig_interval. Since it popped up again, the | |
466 | * flag can be reset like it was never enqueued | |
467 | */ | |
468 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
469 | goto add_event; | |
470 | } | |
471 | ||
472 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
473 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
474 | "Roaming client %pM (vid: %d) came back to its original location\n", |
475 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
476 | /* the ROAM flag is set because this client roamed away |
477 | * and the node got a roaming_advertisement message. Now | |
478 | * that the client popped up again at its original | |
479 | * location such flag can be unset | |
480 | */ | |
481 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
482 | roamed_back = true; | |
483 | } | |
484 | goto check_roaming; | |
c6c8fea2 SE |
485 | } |
486 | ||
47c94655 AQ |
487 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
488 | if (!tt_local) | |
7683fdc1 | 489 | goto out; |
a73105b8 | 490 | |
39c75a51 | 491 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
492 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
493 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 494 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 495 | |
47c94655 | 496 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
497 | /* The local entry has to be marked as NEW to avoid to send it in |
498 | * a full table response going out before the next ttvn increment | |
499 | * (consistency check) | |
500 | */ | |
501 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 502 | tt_local->common.vid = vid; |
9563877e | 503 | if (batadv_is_wifi_iface(ifindex)) |
47c94655 AQ |
504 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
505 | atomic_set(&tt_local->common.refcount, 2); | |
506 | tt_local->last_seen = jiffies; | |
507 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
508 | |
509 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 510 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 511 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 512 | |
807736f6 | 513 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 514 | batadv_choose_tt, &tt_local->common, |
47c94655 | 515 | &tt_local->common.hash_entry); |
80b3f58c SW |
516 | |
517 | if (unlikely(hash_added != 0)) { | |
518 | /* remove the reference for the hash */ | |
47c94655 | 519 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
520 | goto out; |
521 | } | |
522 | ||
068ee6e2 | 523 | add_event: |
3abe4adb | 524 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 525 | |
068ee6e2 AQ |
526 | check_roaming: |
527 | /* Check whether it is a roaming, but don't do anything if the roaming | |
528 | * process has already been handled | |
529 | */ | |
530 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 531 | /* These node are probably going to update their tt table */ |
47c94655 | 532 | head = &tt_global->orig_list; |
db08e6e5 | 533 | rcu_read_lock(); |
b67bfe0d | 534 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 535 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 536 | tt_global->common.vid, |
a513088d | 537 | orig_entry->orig_node); |
db08e6e5 SW |
538 | } |
539 | rcu_read_unlock(); | |
068ee6e2 AQ |
540 | if (roamed_back) { |
541 | batadv_tt_global_free(bat_priv, tt_global, | |
542 | "Roaming canceled"); | |
543 | tt_global = NULL; | |
544 | } else { | |
545 | /* The global entry has to be marked as ROAMING and | |
546 | * has to be kept for consistency purpose | |
547 | */ | |
548 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
549 | tt_global->roam_at = jiffies; | |
550 | } | |
7683fdc1 | 551 | } |
068ee6e2 | 552 | |
7683fdc1 | 553 | out: |
47c94655 AQ |
554 | if (tt_local) |
555 | batadv_tt_local_entry_free_ref(tt_local); | |
556 | if (tt_global) | |
557 | batadv_tt_global_entry_free_ref(tt_global); | |
c6c8fea2 SE |
558 | } |
559 | ||
7ea7b4a1 AQ |
560 | /** |
561 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
562 | * within a TT Response directed to another node | |
563 | * @orig_node: originator for which the TT data has to be prepared | |
564 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
565 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
566 | * changed can be stored | |
567 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
568 | * function reserves the amount of space needed to send the entire global TT | |
569 | * table. In case of success the value is updated with the real amount of | |
570 | * reserved bytes | |
571 | ||
572 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
573 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
574 | * objects, one per active VLAN served by the originator node. | |
575 | * | |
576 | * Return the size of the allocated buffer or 0 in case of failure. | |
577 | */ | |
578 | static uint16_t | |
579 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
580 | struct batadv_tvlv_tt_data **tt_data, | |
581 | struct batadv_tvlv_tt_change **tt_change, | |
582 | int32_t *tt_len) | |
583 | { | |
584 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
585 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
586 | struct batadv_orig_node_vlan *vlan; | |
587 | uint8_t *tt_change_ptr; | |
588 | ||
589 | rcu_read_lock(); | |
590 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
591 | num_vlan++; | |
592 | num_entries += atomic_read(&vlan->tt.num_entries); | |
593 | } | |
594 | ||
595 | change_offset = sizeof(**tt_data); | |
596 | change_offset += num_vlan * sizeof(*tt_vlan); | |
597 | ||
598 | /* if tt_len is negative, allocate the space needed by the full table */ | |
599 | if (*tt_len < 0) | |
600 | *tt_len = batadv_tt_len(num_entries); | |
601 | ||
602 | tvlv_len = *tt_len; | |
603 | tvlv_len += change_offset; | |
604 | ||
605 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
606 | if (!*tt_data) { | |
607 | *tt_len = 0; | |
608 | goto out; | |
609 | } | |
610 | ||
611 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
612 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
613 | (*tt_data)->num_vlan = htons(num_vlan); | |
614 | ||
615 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
616 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
617 | tt_vlan->vid = htons(vlan->vid); | |
618 | tt_vlan->crc = htonl(vlan->tt.crc); | |
619 | ||
620 | tt_vlan++; | |
621 | } | |
622 | ||
623 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
624 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
625 | ||
626 | out: | |
627 | rcu_read_unlock(); | |
628 | return tvlv_len; | |
629 | } | |
630 | ||
631 | /** | |
632 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
633 | * node | |
634 | * @bat_priv: the bat priv with all the soft interface information | |
635 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
636 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
637 | * changes can be stored | |
638 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
639 | * function reserves the amount of space needed to send the entire local TT | |
640 | * table. In case of success the value is updated with the real amount of | |
641 | * reserved bytes | |
642 | * | |
643 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
644 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
645 | * objects, one per active VLAN. | |
646 | * | |
647 | * Return the size of the allocated buffer or 0 in case of failure. | |
648 | */ | |
649 | static uint16_t | |
650 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
651 | struct batadv_tvlv_tt_data **tt_data, | |
652 | struct batadv_tvlv_tt_change **tt_change, | |
653 | int32_t *tt_len) | |
654 | { | |
655 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
656 | struct batadv_softif_vlan *vlan; | |
657 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
658 | uint8_t *tt_change_ptr; | |
659 | int change_offset; | |
660 | ||
661 | rcu_read_lock(); | |
662 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
663 | num_vlan++; | |
664 | num_entries += atomic_read(&vlan->tt.num_entries); | |
665 | } | |
666 | ||
667 | change_offset = sizeof(**tt_data); | |
668 | change_offset += num_vlan * sizeof(*tt_vlan); | |
669 | ||
670 | /* if tt_len is negative, allocate the space needed by the full table */ | |
671 | if (*tt_len < 0) | |
672 | *tt_len = batadv_tt_len(num_entries); | |
673 | ||
674 | tvlv_len = *tt_len; | |
675 | tvlv_len += change_offset; | |
676 | ||
677 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
678 | if (!*tt_data) { | |
679 | tvlv_len = 0; | |
680 | goto out; | |
681 | } | |
682 | ||
683 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
684 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
685 | (*tt_data)->num_vlan = htons(num_vlan); | |
686 | ||
687 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
688 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
689 | tt_vlan->vid = htons(vlan->vid); | |
690 | tt_vlan->crc = htonl(vlan->tt.crc); | |
691 | ||
692 | tt_vlan++; | |
693 | } | |
694 | ||
695 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
696 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
697 | ||
698 | out: | |
699 | rcu_read_unlock(); | |
700 | return tvlv_len; | |
701 | } | |
702 | ||
e1bf0c14 ML |
703 | /** |
704 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
705 | * after local tt changes have been committed | |
706 | * @bat_priv: the bat priv with all the soft interface information | |
707 | */ | |
708 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 709 | { |
e1bf0c14 ML |
710 | struct batadv_tt_change_node *entry, *safe; |
711 | struct batadv_tvlv_tt_data *tt_data; | |
712 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 713 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 714 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 715 | uint16_t tvlv_len; |
be9aa4c1 | 716 | |
7ea7b4a1 AQ |
717 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
718 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
719 | |
720 | /* if we have too many changes for one packet don't send any | |
721 | * and wait for the tt table request which will be fragmented | |
722 | */ | |
e1bf0c14 ML |
723 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
724 | tt_diff_len = 0; | |
be9aa4c1 | 725 | |
7ea7b4a1 AQ |
726 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
727 | &tt_change, &tt_diff_len); | |
728 | if (!tvlv_len) | |
e1bf0c14 | 729 | return; |
be9aa4c1 | 730 | |
e1bf0c14 | 731 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 732 | |
e1bf0c14 ML |
733 | if (tt_diff_len == 0) |
734 | goto container_register; | |
be9aa4c1 | 735 | |
807736f6 SE |
736 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
737 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 738 | |
807736f6 | 739 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 740 | list) { |
e1bf0c14 ML |
741 | if (tt_diff_entries_count < tt_diff_entries_num) { |
742 | memcpy(tt_change + tt_diff_entries_count, | |
743 | &entry->change, | |
744 | sizeof(struct batadv_tvlv_tt_change)); | |
745 | tt_diff_entries_count++; | |
c6c8fea2 | 746 | } |
a73105b8 AQ |
747 | list_del(&entry->list); |
748 | kfree(entry); | |
c6c8fea2 | 749 | } |
807736f6 | 750 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
751 | |
752 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
753 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
754 | kfree(bat_priv->tt.last_changeset); | |
755 | bat_priv->tt.last_changeset_len = 0; | |
756 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 757 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 758 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 759 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 760 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
761 | * instead of providing the diff |
762 | */ | |
e1bf0c14 | 763 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 764 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
765 | memcpy(bat_priv->tt.last_changeset, |
766 | tt_change, tt_change_len); | |
767 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
768 | } |
769 | } | |
807736f6 | 770 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 771 | |
e1bf0c14 ML |
772 | container_register: |
773 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 774 | tvlv_len); |
e1bf0c14 | 775 | kfree(tt_data); |
c6c8fea2 SE |
776 | } |
777 | ||
08c36d3e | 778 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
779 | { |
780 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 781 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 782 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 783 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 784 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 785 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 786 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 787 | struct hlist_head *head; |
7ea7b4a1 | 788 | unsigned short vid; |
c90681b8 | 789 | uint32_t i; |
85766a82 AQ |
790 | int last_seen_secs; |
791 | int last_seen_msecs; | |
792 | unsigned long last_seen_jiffies; | |
793 | bool no_purge; | |
794 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 795 | |
30da63a6 ML |
796 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
797 | if (!primary_if) | |
32ae9b22 | 798 | goto out; |
c6c8fea2 | 799 | |
86ceb360 | 800 | seq_printf(seq, |
7ea7b4a1 AQ |
801 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
802 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
803 | seq_printf(seq, " %-13s %s %-7s %-9s (%-10s)\n", "Client", "VID", | |
804 | "Flags", "Last seen", "CRC"); | |
c6c8fea2 | 805 | |
c6c8fea2 SE |
806 | for (i = 0; i < hash->size; i++) { |
807 | head = &hash->table[i]; | |
808 | ||
7aadf889 | 809 | rcu_read_lock(); |
b67bfe0d | 810 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 811 | head, hash_entry) { |
85766a82 AQ |
812 | tt_local = container_of(tt_common_entry, |
813 | struct batadv_tt_local_entry, | |
814 | common); | |
7ea7b4a1 | 815 | vid = tt_common_entry->vid; |
85766a82 AQ |
816 | last_seen_jiffies = jiffies - tt_local->last_seen; |
817 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
818 | last_seen_secs = last_seen_msecs / 1000; | |
819 | last_seen_msecs = last_seen_msecs % 1000; | |
820 | ||
821 | no_purge = tt_common_entry->flags & np_flag; | |
822 | ||
7ea7b4a1 AQ |
823 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
824 | if (!vlan) { | |
825 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
826 | BATADV_PRINT_VID(vid)); | |
827 | continue; | |
828 | } | |
829 | ||
830 | seq_printf(seq, | |
831 | " * %pM %4i [%c%c%c%c%c] %3u.%03u (%#.8x)\n", | |
7c64fd98 | 832 | tt_common_entry->addr, |
16052789 | 833 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 834 | (tt_common_entry->flags & |
acd34afa | 835 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 836 | no_purge ? 'P' : '.', |
7c64fd98 | 837 | (tt_common_entry->flags & |
acd34afa | 838 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 839 | (tt_common_entry->flags & |
acd34afa | 840 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 841 | (tt_common_entry->flags & |
85766a82 | 842 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
a7966d90 | 843 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
844 | no_purge ? 0 : last_seen_msecs, |
845 | vlan->tt.crc); | |
846 | ||
847 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 848 | } |
7aadf889 | 849 | rcu_read_unlock(); |
c6c8fea2 | 850 | } |
32ae9b22 ML |
851 | out: |
852 | if (primary_if) | |
e5d89254 | 853 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 854 | return 0; |
c6c8fea2 SE |
855 | } |
856 | ||
56303d34 SE |
857 | static void |
858 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
859 | struct batadv_tt_local_entry *tt_local_entry, | |
860 | uint16_t flags, const char *message) | |
c6c8fea2 | 861 | { |
3abe4adb | 862 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 863 | |
015758d0 AQ |
864 | /* The local client has to be marked as "pending to be removed" but has |
865 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
866 | * response issued before the net ttvn increment (consistency check) |
867 | */ | |
acd34afa | 868 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 869 | |
39c75a51 | 870 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
871 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
872 | tt_local_entry->common.addr, | |
873 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
874 | } |
875 | ||
7f91d06c AQ |
876 | /** |
877 | * batadv_tt_local_remove - logically remove an entry from the local table | |
878 | * @bat_priv: the bat priv with all the soft interface information | |
879 | * @addr: the MAC address of the client to remove | |
c018ad3d | 880 | * @vid: VLAN identifier |
7f91d06c AQ |
881 | * @message: message to append to the log on deletion |
882 | * @roaming: true if the deletion is due to a roaming event | |
883 | * | |
884 | * Returns the flags assigned to the local entry before being deleted | |
885 | */ | |
886 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
887 | const uint8_t *addr, unsigned short vid, |
888 | const char *message, bool roaming) | |
c6c8fea2 | 889 | { |
170173bf | 890 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 891 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 892 | |
c018ad3d | 893 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
894 | if (!tt_local_entry) |
895 | goto out; | |
896 | ||
7f91d06c AQ |
897 | curr_flags = tt_local_entry->common.flags; |
898 | ||
acd34afa | 899 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
900 | /* if this global entry addition is due to a roaming, the node has to |
901 | * mark the local entry as "roamed" in order to correctly reroute | |
902 | * packets later | |
903 | */ | |
7c1fd91d | 904 | if (roaming) { |
acd34afa | 905 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
906 | /* mark the local client as ROAMed */ |
907 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
908 | } | |
42d0b044 | 909 | |
068ee6e2 AQ |
910 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
911 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
912 | message); | |
913 | goto out; | |
914 | } | |
915 | /* if this client has been added right now, it is possible to | |
916 | * immediately purge it | |
917 | */ | |
3abe4adb | 918 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
919 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
920 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 921 | |
7683fdc1 AQ |
922 | out: |
923 | if (tt_local_entry) | |
a513088d | 924 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
925 | |
926 | return curr_flags; | |
c6c8fea2 SE |
927 | } |
928 | ||
56303d34 | 929 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 930 | struct hlist_head *head) |
c6c8fea2 | 931 | { |
56303d34 SE |
932 | struct batadv_tt_local_entry *tt_local_entry; |
933 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 934 | struct hlist_node *node_tmp; |
acd34afa | 935 | |
b67bfe0d | 936 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
937 | hash_entry) { |
938 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
939 | struct batadv_tt_local_entry, |
940 | common); | |
acd34afa SE |
941 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
942 | continue; | |
943 | ||
944 | /* entry already marked for deletion */ | |
945 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
946 | continue; | |
947 | ||
948 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
949 | BATADV_TT_LOCAL_TIMEOUT)) | |
950 | continue; | |
951 | ||
952 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
953 | BATADV_TT_CLIENT_DEL, "timed out"); | |
954 | } | |
955 | } | |
956 | ||
56303d34 | 957 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 958 | { |
807736f6 | 959 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 960 | struct hlist_head *head; |
7683fdc1 | 961 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 962 | uint32_t i; |
c6c8fea2 | 963 | |
c6c8fea2 SE |
964 | for (i = 0; i < hash->size; i++) { |
965 | head = &hash->table[i]; | |
7683fdc1 | 966 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 967 | |
7683fdc1 | 968 | spin_lock_bh(list_lock); |
acd34afa | 969 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 970 | spin_unlock_bh(list_lock); |
c6c8fea2 | 971 | } |
c6c8fea2 SE |
972 | } |
973 | ||
56303d34 | 974 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 975 | { |
5bf74e9c | 976 | struct batadv_hashtable *hash; |
a73105b8 | 977 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
978 | struct batadv_tt_common_entry *tt_common_entry; |
979 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 980 | struct hlist_node *node_tmp; |
7683fdc1 | 981 | struct hlist_head *head; |
c90681b8 | 982 | uint32_t i; |
a73105b8 | 983 | |
807736f6 | 984 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
985 | return; |
986 | ||
807736f6 | 987 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
988 | |
989 | for (i = 0; i < hash->size; i++) { | |
990 | head = &hash->table[i]; | |
991 | list_lock = &hash->list_locks[i]; | |
992 | ||
993 | spin_lock_bh(list_lock); | |
b67bfe0d | 994 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 995 | head, hash_entry) { |
b67bfe0d | 996 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
997 | tt_local = container_of(tt_common_entry, |
998 | struct batadv_tt_local_entry, | |
999 | common); | |
1000 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
1001 | } |
1002 | spin_unlock_bh(list_lock); | |
1003 | } | |
1004 | ||
1a8eaf07 | 1005 | batadv_hash_destroy(hash); |
a73105b8 | 1006 | |
807736f6 | 1007 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1008 | } |
1009 | ||
56303d34 | 1010 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1011 | { |
807736f6 | 1012 | if (bat_priv->tt.global_hash) |
5346c35e | 1013 | return 0; |
c6c8fea2 | 1014 | |
807736f6 | 1015 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1016 | |
807736f6 | 1017 | if (!bat_priv->tt.global_hash) |
5346c35e | 1018 | return -ENOMEM; |
c6c8fea2 | 1019 | |
dec05074 AQ |
1020 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1021 | &batadv_tt_global_hash_lock_class_key); | |
1022 | ||
5346c35e | 1023 | return 0; |
c6c8fea2 SE |
1024 | } |
1025 | ||
56303d34 | 1026 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1027 | { |
56303d34 | 1028 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1029 | |
807736f6 | 1030 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1031 | |
807736f6 | 1032 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1033 | list) { |
1034 | list_del(&entry->list); | |
1035 | kfree(entry); | |
1036 | } | |
c6c8fea2 | 1037 | |
807736f6 SE |
1038 | atomic_set(&bat_priv->tt.local_changes, 0); |
1039 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1040 | } |
c6c8fea2 | 1041 | |
d657e621 AQ |
1042 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1043 | * batadv_tt_global_entry list | |
1044 | * | |
1045 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1046 | */ |
d657e621 AQ |
1047 | static struct batadv_tt_orig_list_entry * |
1048 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1049 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1050 | { |
d657e621 | 1051 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1052 | const struct hlist_head *head; |
db08e6e5 SW |
1053 | |
1054 | rcu_read_lock(); | |
1055 | head = &entry->orig_list; | |
b67bfe0d | 1056 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1057 | if (tmp_orig_entry->orig_node != orig_node) |
1058 | continue; | |
1059 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1060 | continue; | |
1061 | ||
1062 | orig_entry = tmp_orig_entry; | |
1063 | break; | |
db08e6e5 SW |
1064 | } |
1065 | rcu_read_unlock(); | |
d657e621 AQ |
1066 | |
1067 | return orig_entry; | |
1068 | } | |
1069 | ||
1070 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1071 | * returns true if found, false otherwise | |
1072 | */ | |
1073 | static bool | |
1074 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1075 | const struct batadv_orig_node *orig_node) | |
1076 | { | |
1077 | struct batadv_tt_orig_list_entry *orig_entry; | |
1078 | bool found = false; | |
1079 | ||
1080 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1081 | if (orig_entry) { | |
1082 | found = true; | |
1083 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1084 | } | |
1085 | ||
db08e6e5 SW |
1086 | return found; |
1087 | } | |
1088 | ||
a513088d | 1089 | static void |
d657e621 | 1090 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1091 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1092 | { |
56303d34 | 1093 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1094 | |
d657e621 | 1095 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1096 | if (orig_entry) { |
1097 | /* refresh the ttvn: the current value could be a bogus one that | |
1098 | * was added during a "temporary client detection" | |
1099 | */ | |
1100 | orig_entry->ttvn = ttvn; | |
d657e621 | 1101 | goto out; |
30cfd02b | 1102 | } |
d657e621 | 1103 | |
db08e6e5 SW |
1104 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1105 | if (!orig_entry) | |
d657e621 | 1106 | goto out; |
db08e6e5 SW |
1107 | |
1108 | INIT_HLIST_NODE(&orig_entry->list); | |
1109 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1110 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1111 | orig_entry->orig_node = orig_node; |
1112 | orig_entry->ttvn = ttvn; | |
d657e621 | 1113 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1114 | |
d657e621 | 1115 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1116 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1117 | &tt_global->orig_list); |
1118 | spin_unlock_bh(&tt_global->list_lock); | |
1119 | out: | |
1120 | if (orig_entry) | |
1121 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1122 | } |
1123 | ||
d4ff40f6 AQ |
1124 | /** |
1125 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1126 | * @bat_priv: the bat priv with all the soft interface information | |
1127 | * @orig_node: the originator announcing the client | |
1128 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1129 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1130 | * @flags: TT flags that have to be set for this non-mesh client |
1131 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1132 | * | |
1133 | * Add a new TT global entry for the given originator. If the entry already | |
1134 | * exists add a new reference to the given originator (a global entry can have | |
1135 | * references to multiple originators) and adjust the flags attribute to reflect | |
1136 | * the function argument. | |
1137 | * If a TT local entry exists for this non-mesh client remove it. | |
1138 | * | |
1139 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1140 | * |
1141 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1142 | */ |
1e5d49fc AQ |
1143 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1144 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1145 | const unsigned char *tt_addr, |
1146 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1147 | uint8_t ttvn) |
a73105b8 | 1148 | { |
170173bf SE |
1149 | struct batadv_tt_global_entry *tt_global_entry; |
1150 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1151 | bool ret = false; |
80b3f58c | 1152 | int hash_added; |
56303d34 | 1153 | struct batadv_tt_common_entry *common; |
7f91d06c | 1154 | uint16_t local_flags; |
c6c8fea2 | 1155 | |
cfd4f757 AQ |
1156 | /* ignore global entries from backbone nodes */ |
1157 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1158 | return true; | |
1159 | ||
c018ad3d AQ |
1160 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1161 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1162 | |
1163 | /* if the node already has a local client for this entry, it has to wait | |
1164 | * for a roaming advertisement instead of manually messing up the global | |
1165 | * table | |
1166 | */ | |
1167 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1168 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1169 | goto out; | |
a73105b8 AQ |
1170 | |
1171 | if (!tt_global_entry) { | |
d4f44692 | 1172 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1173 | if (!tt_global_entry) |
7683fdc1 AQ |
1174 | goto out; |
1175 | ||
c0a55929 SE |
1176 | common = &tt_global_entry->common; |
1177 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
c018ad3d | 1178 | common->vid = vid; |
db08e6e5 | 1179 | |
d4f44692 | 1180 | common->flags = flags; |
cc47f66e | 1181 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1182 | /* node must store current time in case of roaming. This is |
1183 | * needed to purge this entry out on timeout (if nobody claims | |
1184 | * it) | |
1185 | */ | |
1186 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1187 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1188 | atomic_set(&common->refcount, 2); |
30cfd02b | 1189 | common->added_at = jiffies; |
db08e6e5 SW |
1190 | |
1191 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1192 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 1193 | |
807736f6 | 1194 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1195 | batadv_compare_tt, |
c018ad3d | 1196 | batadv_choose_tt, common, |
a513088d | 1197 | &common->hash_entry); |
80b3f58c SW |
1198 | |
1199 | if (unlikely(hash_added != 0)) { | |
1200 | /* remove the reference for the hash */ | |
a513088d | 1201 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1202 | goto out_remove; |
1203 | } | |
a73105b8 | 1204 | } else { |
068ee6e2 | 1205 | common = &tt_global_entry->common; |
30cfd02b AQ |
1206 | /* If there is already a global entry, we can use this one for |
1207 | * our processing. | |
068ee6e2 AQ |
1208 | * But if we are trying to add a temporary client then here are |
1209 | * two options at this point: | |
1210 | * 1) the global client is not a temporary client: the global | |
1211 | * client has to be left as it is, temporary information | |
1212 | * should never override any already known client state | |
1213 | * 2) the global client is a temporary client: purge the | |
1214 | * originator list and add the new one orig_entry | |
30cfd02b | 1215 | */ |
068ee6e2 AQ |
1216 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1217 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1218 | goto out; | |
1219 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1220 | orig_node)) | |
1221 | goto out_remove; | |
1222 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1223 | goto add_orig_entry; | |
1224 | } | |
30cfd02b AQ |
1225 | |
1226 | /* if the client was temporary added before receiving the first | |
1227 | * OGM announcing it, we have to clear the TEMP flag | |
1228 | */ | |
068ee6e2 | 1229 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1230 | |
e9c00136 AQ |
1231 | /* the change can carry possible "attribute" flags like the |
1232 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1233 | * client entry | |
1234 | */ | |
1235 | tt_global_entry->common.flags |= flags; | |
1236 | ||
acd34afa SE |
1237 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1238 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1239 | * delete + roaming change for this originator. |
1240 | * | |
1241 | * We should first delete the old originator before adding the | |
1242 | * new one. | |
1243 | */ | |
068ee6e2 | 1244 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1245 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1246 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1247 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1248 | } |
1249 | } | |
068ee6e2 | 1250 | add_orig_entry: |
30cfd02b | 1251 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1252 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1253 | |
39c75a51 | 1254 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1255 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1256 | common->addr, BATADV_PRINT_VID(common->vid), | |
1257 | orig_node->orig); | |
1e5d49fc | 1258 | ret = true; |
c6c8fea2 | 1259 | |
80b3f58c | 1260 | out_remove: |
7f91d06c | 1261 | |
a73105b8 | 1262 | /* remove address from local hash if present */ |
c018ad3d | 1263 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1264 | "global tt received", |
c1d07431 | 1265 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1266 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1267 | ||
068ee6e2 AQ |
1268 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1269 | /* this is a normal global add. Therefore the client is not in a | |
1270 | * roaming state anymore. | |
1271 | */ | |
1272 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1273 | ||
7683fdc1 AQ |
1274 | out: |
1275 | if (tt_global_entry) | |
a513088d | 1276 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1277 | if (tt_local_entry) |
1278 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1279 | return ret; |
c6c8fea2 SE |
1280 | } |
1281 | ||
981d8900 SE |
1282 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
1283 | * @tt_global_entry: global translation table entry to be analyzed | |
1284 | * | |
1285 | * This functon assumes the caller holds rcu_read_lock(). | |
1286 | * Returns best originator list entry or NULL on errors. | |
1287 | */ | |
1288 | static struct batadv_tt_orig_list_entry * | |
1289 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) | |
1290 | { | |
1291 | struct batadv_neigh_node *router = NULL; | |
1292 | struct hlist_head *head; | |
981d8900 SE |
1293 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
1294 | int best_tq = 0; | |
1295 | ||
1296 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1297 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1298 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
1299 | if (!router) | |
1300 | continue; | |
1301 | ||
0538f759 | 1302 | if (router->bat_iv.tq_avg > best_tq) { |
981d8900 | 1303 | best_entry = orig_entry; |
0538f759 | 1304 | best_tq = router->bat_iv.tq_avg; |
981d8900 SE |
1305 | } |
1306 | ||
1307 | batadv_neigh_node_free_ref(router); | |
1308 | } | |
1309 | ||
1310 | return best_entry; | |
1311 | } | |
1312 | ||
1313 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1314 | * for this global entry | |
1315 | * @tt_global_entry: global translation table entry to be printed | |
1316 | * @seq: debugfs table seq_file struct | |
1317 | * | |
1318 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1319 | */ |
a513088d | 1320 | static void |
56303d34 | 1321 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 1322 | struct seq_file *seq) |
db08e6e5 | 1323 | { |
981d8900 | 1324 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1325 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1326 | struct batadv_orig_node_vlan *vlan; |
1327 | struct hlist_head *head; | |
db08e6e5 | 1328 | uint8_t last_ttvn; |
7ea7b4a1 | 1329 | uint16_t flags; |
db08e6e5 SW |
1330 | |
1331 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1332 | flags = tt_common_entry->flags; |
1333 | ||
1334 | best_entry = batadv_transtable_best_orig(tt_global_entry); | |
1335 | if (best_entry) { | |
7ea7b4a1 AQ |
1336 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1337 | tt_common_entry->vid); | |
1338 | if (!vlan) { | |
1339 | seq_printf(seq, | |
1340 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1341 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1342 | best_entry->orig_node->orig); | |
1343 | goto print_list; | |
1344 | } | |
1345 | ||
981d8900 | 1346 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1347 | seq_printf(seq, |
16052789 | 1348 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1349 | '*', tt_global_entry->common.addr, |
16052789 | 1350 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1351 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1352 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1353 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1354 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1355 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1356 | |
1357 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1358 | } |
db08e6e5 | 1359 | |
7ea7b4a1 | 1360 | print_list: |
db08e6e5 SW |
1361 | head = &tt_global_entry->orig_list; |
1362 | ||
b67bfe0d | 1363 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1364 | if (best_entry == orig_entry) |
1365 | continue; | |
1366 | ||
7ea7b4a1 AQ |
1367 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1368 | tt_common_entry->vid); | |
1369 | if (!vlan) { | |
1370 | seq_printf(seq, | |
1371 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1372 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1373 | orig_entry->orig_node->orig); | |
1374 | continue; | |
1375 | } | |
1376 | ||
db08e6e5 | 1377 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1378 | seq_printf(seq, |
7ea7b4a1 | 1379 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1380 | '+', tt_global_entry->common.addr, |
16052789 | 1381 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1382 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1383 | last_ttvn, vlan->tt.crc, |
acd34afa | 1384 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1385 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1386 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1387 | |
1388 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1389 | } |
1390 | } | |
1391 | ||
08c36d3e | 1392 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1393 | { |
1394 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1395 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1396 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1397 | struct batadv_tt_common_entry *tt_common_entry; |
1398 | struct batadv_tt_global_entry *tt_global; | |
1399 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1400 | struct hlist_head *head; |
c90681b8 | 1401 | uint32_t i; |
c6c8fea2 | 1402 | |
30da63a6 ML |
1403 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1404 | if (!primary_if) | |
32ae9b22 | 1405 | goto out; |
c6c8fea2 | 1406 | |
2dafb49d AQ |
1407 | seq_printf(seq, |
1408 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1409 | net_dev->name); |
16052789 AQ |
1410 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1411 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1412 | "CRC", "Flags"); | |
c6c8fea2 | 1413 | |
c6c8fea2 SE |
1414 | for (i = 0; i < hash->size; i++) { |
1415 | head = &hash->table[i]; | |
1416 | ||
7aadf889 | 1417 | rcu_read_lock(); |
b67bfe0d | 1418 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1419 | head, hash_entry) { |
56303d34 SE |
1420 | tt_global = container_of(tt_common_entry, |
1421 | struct batadv_tt_global_entry, | |
1422 | common); | |
1423 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 1424 | } |
7aadf889 | 1425 | rcu_read_unlock(); |
c6c8fea2 | 1426 | } |
32ae9b22 ML |
1427 | out: |
1428 | if (primary_if) | |
e5d89254 | 1429 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1430 | return 0; |
c6c8fea2 SE |
1431 | } |
1432 | ||
db08e6e5 | 1433 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1434 | static void |
56303d34 | 1435 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1436 | { |
db08e6e5 | 1437 | struct hlist_head *head; |
b67bfe0d | 1438 | struct hlist_node *safe; |
56303d34 | 1439 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1440 | |
db08e6e5 SW |
1441 | spin_lock_bh(&tt_global_entry->list_lock); |
1442 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1443 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1444 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1445 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1446 | tt_global_entry->common.vid); | |
a513088d | 1447 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1448 | } |
1449 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1450 | } |
1451 | ||
a513088d | 1452 | static void |
56303d34 SE |
1453 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1454 | struct batadv_tt_global_entry *tt_global_entry, | |
1455 | struct batadv_orig_node *orig_node, | |
a513088d | 1456 | const char *message) |
db08e6e5 SW |
1457 | { |
1458 | struct hlist_head *head; | |
b67bfe0d | 1459 | struct hlist_node *safe; |
56303d34 | 1460 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1461 | unsigned short vid; |
db08e6e5 SW |
1462 | |
1463 | spin_lock_bh(&tt_global_entry->list_lock); | |
1464 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1465 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1466 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1467 | vid = tt_global_entry->common.vid; |
39c75a51 | 1468 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1469 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1470 | orig_node->orig, |
16052789 AQ |
1471 | tt_global_entry->common.addr, |
1472 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1473 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1474 | batadv_tt_global_size_dec(orig_node, |
1475 | tt_global_entry->common.vid); | |
a513088d | 1476 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1477 | } |
1478 | } | |
1479 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1480 | } | |
1481 | ||
db08e6e5 | 1482 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1483 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1484 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1485 | */ |
a513088d | 1486 | static void |
56303d34 SE |
1487 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1488 | struct batadv_tt_global_entry *tt_global_entry, | |
1489 | struct batadv_orig_node *orig_node, | |
1490 | const char *message) | |
db08e6e5 SW |
1491 | { |
1492 | bool last_entry = true; | |
1493 | struct hlist_head *head; | |
56303d34 | 1494 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1495 | |
1496 | /* no local entry exists, case 1: | |
1497 | * Check if this is the last one or if other entries exist. | |
1498 | */ | |
1499 | ||
1500 | rcu_read_lock(); | |
1501 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1502 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1503 | if (orig_entry->orig_node != orig_node) { |
1504 | last_entry = false; | |
1505 | break; | |
1506 | } | |
1507 | } | |
1508 | rcu_read_unlock(); | |
1509 | ||
1510 | if (last_entry) { | |
1511 | /* its the last one, mark for roaming. */ | |
acd34afa | 1512 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1513 | tt_global_entry->roam_at = jiffies; |
1514 | } else | |
1515 | /* there is another entry, we can simply delete this | |
1516 | * one and can still use the other one. | |
1517 | */ | |
a513088d SE |
1518 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1519 | orig_node, message); | |
db08e6e5 SW |
1520 | } |
1521 | ||
c018ad3d AQ |
1522 | /** |
1523 | * batadv_tt_global_del - remove a client from the global table | |
1524 | * @bat_priv: the bat priv with all the soft interface information | |
1525 | * @orig_node: an originator serving this client | |
1526 | * @addr: the mac address of the client | |
1527 | * @vid: VLAN identifier | |
1528 | * @message: a message explaining the reason for deleting the client to print | |
1529 | * for debugging purpose | |
1530 | * @roaming: true if the deletion has been triggered by a roaming event | |
1531 | */ | |
56303d34 SE |
1532 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1533 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1534 | const unsigned char *addr, unsigned short vid, |
a513088d | 1535 | const char *message, bool roaming) |
a73105b8 | 1536 | { |
170173bf | 1537 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1538 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1539 | |
c018ad3d | 1540 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1541 | if (!tt_global_entry) |
7683fdc1 | 1542 | goto out; |
a73105b8 | 1543 | |
db08e6e5 | 1544 | if (!roaming) { |
a513088d SE |
1545 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1546 | orig_node, message); | |
db08e6e5 SW |
1547 | |
1548 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1549 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1550 | message); | |
db08e6e5 SW |
1551 | |
1552 | goto out; | |
1553 | } | |
92f90f56 SE |
1554 | |
1555 | /* if we are deleting a global entry due to a roam | |
1556 | * event, there are two possibilities: | |
db08e6e5 SW |
1557 | * 1) the client roamed from node A to node B => if there |
1558 | * is only one originator left for this client, we mark | |
acd34afa | 1559 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1560 | * wait for node B to claim it. In case of timeout |
1561 | * the entry is purged. | |
db08e6e5 SW |
1562 | * |
1563 | * If there are other originators left, we directly delete | |
1564 | * the originator. | |
92f90f56 | 1565 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1566 | * the global entry, since it is useless now. |
1567 | */ | |
a513088d | 1568 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1569 | tt_global_entry->common.addr, |
1570 | vid); | |
a513088d | 1571 | if (local_entry) { |
db08e6e5 | 1572 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1573 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1574 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1575 | } else |
1576 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1577 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1578 | orig_node, message); | |
92f90f56 | 1579 | |
92f90f56 | 1580 | |
cc47f66e | 1581 | out: |
7683fdc1 | 1582 | if (tt_global_entry) |
a513088d SE |
1583 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1584 | if (local_entry) | |
1585 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1586 | } |
1587 | ||
95fb130d AQ |
1588 | /** |
1589 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1590 | * given originator matching the provided vid | |
1591 | * @bat_priv: the bat priv with all the soft interface information | |
1592 | * @orig_node: the originator owning the entries to remove | |
1593 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1594 | * removed | |
1595 | * @message: debug message to print as "reason" | |
1596 | */ | |
56303d34 SE |
1597 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1598 | struct batadv_orig_node *orig_node, | |
95fb130d | 1599 | int32_t match_vid, |
56303d34 | 1600 | const char *message) |
c6c8fea2 | 1601 | { |
56303d34 SE |
1602 | struct batadv_tt_global_entry *tt_global; |
1603 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1604 | uint32_t i; |
807736f6 | 1605 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1606 | struct hlist_node *safe; |
a73105b8 | 1607 | struct hlist_head *head; |
7683fdc1 | 1608 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1609 | unsigned short vid; |
c6c8fea2 | 1610 | |
6e801494 SW |
1611 | if (!hash) |
1612 | return; | |
1613 | ||
a73105b8 AQ |
1614 | for (i = 0; i < hash->size; i++) { |
1615 | head = &hash->table[i]; | |
7683fdc1 | 1616 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1617 | |
7683fdc1 | 1618 | spin_lock_bh(list_lock); |
b67bfe0d | 1619 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1620 | head, hash_entry) { |
95fb130d AQ |
1621 | /* remove only matching entries */ |
1622 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1623 | continue; | |
1624 | ||
56303d34 SE |
1625 | tt_global = container_of(tt_common_entry, |
1626 | struct batadv_tt_global_entry, | |
1627 | common); | |
db08e6e5 | 1628 | |
56303d34 | 1629 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1630 | orig_node, message); |
db08e6e5 | 1631 | |
56303d34 | 1632 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1633 | vid = tt_global->common.vid; |
39c75a51 | 1634 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1635 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1636 | tt_global->common.addr, | |
1637 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1638 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1639 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1640 | } |
a73105b8 | 1641 | } |
7683fdc1 | 1642 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1643 | } |
17071578 | 1644 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1645 | } |
1646 | ||
30cfd02b AQ |
1647 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1648 | char **msg) | |
cc47f66e | 1649 | { |
30cfd02b AQ |
1650 | bool purge = false; |
1651 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1652 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1653 | |
30cfd02b AQ |
1654 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1655 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1656 | purge = true; | |
1657 | *msg = "Roaming timeout\n"; | |
1658 | } | |
42d0b044 | 1659 | |
30cfd02b AQ |
1660 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1661 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1662 | purge = true; | |
1663 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1664 | } |
30cfd02b AQ |
1665 | |
1666 | return purge; | |
42d0b044 SE |
1667 | } |
1668 | ||
30cfd02b | 1669 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1670 | { |
807736f6 | 1671 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1672 | struct hlist_head *head; |
b67bfe0d | 1673 | struct hlist_node *node_tmp; |
7683fdc1 | 1674 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1675 | uint32_t i; |
30cfd02b AQ |
1676 | char *msg = NULL; |
1677 | struct batadv_tt_common_entry *tt_common; | |
1678 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1679 | |
cc47f66e AQ |
1680 | for (i = 0; i < hash->size; i++) { |
1681 | head = &hash->table[i]; | |
7683fdc1 | 1682 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1683 | |
7683fdc1 | 1684 | spin_lock_bh(list_lock); |
b67bfe0d | 1685 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1686 | hash_entry) { |
1687 | tt_global = container_of(tt_common, | |
1688 | struct batadv_tt_global_entry, | |
1689 | common); | |
1690 | ||
1691 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1692 | continue; | |
1693 | ||
1694 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1695 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1696 | tt_global->common.addr, | |
1697 | BATADV_PRINT_VID(tt_global->common.vid), | |
1698 | msg); | |
30cfd02b | 1699 | |
b67bfe0d | 1700 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1701 | |
1702 | batadv_tt_global_entry_free_ref(tt_global); | |
1703 | } | |
7683fdc1 | 1704 | spin_unlock_bh(list_lock); |
cc47f66e | 1705 | } |
cc47f66e AQ |
1706 | } |
1707 | ||
56303d34 | 1708 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1709 | { |
5bf74e9c | 1710 | struct batadv_hashtable *hash; |
7683fdc1 | 1711 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1712 | struct batadv_tt_common_entry *tt_common_entry; |
1713 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1714 | struct hlist_node *node_tmp; |
7683fdc1 | 1715 | struct hlist_head *head; |
c90681b8 | 1716 | uint32_t i; |
7683fdc1 | 1717 | |
807736f6 | 1718 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1719 | return; |
1720 | ||
807736f6 | 1721 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1722 | |
1723 | for (i = 0; i < hash->size; i++) { | |
1724 | head = &hash->table[i]; | |
1725 | list_lock = &hash->list_locks[i]; | |
1726 | ||
1727 | spin_lock_bh(list_lock); | |
b67bfe0d | 1728 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1729 | head, hash_entry) { |
b67bfe0d | 1730 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1731 | tt_global = container_of(tt_common_entry, |
1732 | struct batadv_tt_global_entry, | |
1733 | common); | |
1734 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1735 | } |
1736 | spin_unlock_bh(list_lock); | |
1737 | } | |
1738 | ||
1a8eaf07 | 1739 | batadv_hash_destroy(hash); |
7683fdc1 | 1740 | |
807736f6 | 1741 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1742 | } |
1743 | ||
56303d34 SE |
1744 | static bool |
1745 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1746 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1747 | { |
1748 | bool ret = false; | |
1749 | ||
acd34afa SE |
1750 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1751 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1752 | ret = true; |
1753 | ||
1754 | return ret; | |
1755 | } | |
1756 | ||
c018ad3d AQ |
1757 | /** |
1758 | * batadv_transtable_search - get the mesh destination for a given client | |
1759 | * @bat_priv: the bat priv with all the soft interface information | |
1760 | * @src: mac address of the source client | |
1761 | * @addr: mac address of the destination client | |
1762 | * @vid: VLAN identifier | |
1763 | * | |
1764 | * Returns a pointer to the originator that was selected as destination in the | |
1765 | * mesh for contacting the client 'addr', NULL otherwise. | |
1766 | * In case of multiple originators serving the same client, the function returns | |
1767 | * the best one (best in terms of metric towards the destination node). | |
1768 | * | |
1769 | * If the two clients are AP isolated the function returns NULL. | |
1770 | */ | |
56303d34 SE |
1771 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1772 | const uint8_t *src, | |
c018ad3d AQ |
1773 | const uint8_t *addr, |
1774 | unsigned short vid) | |
c6c8fea2 | 1775 | { |
56303d34 SE |
1776 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1777 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1778 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1779 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d AQ |
1780 | bool ap_isolation_enabled = false; |
1781 | struct batadv_softif_vlan *vlan; | |
c6c8fea2 | 1782 | |
b8cbd81d AQ |
1783 | /* if the AP isolation is requested on a VLAN, then check for its |
1784 | * setting in the proper VLAN private data structure | |
1785 | */ | |
1786 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1787 | if (vlan) { | |
1788 | ap_isolation_enabled = atomic_read(&vlan->ap_isolation); | |
1789 | batadv_softif_vlan_free_ref(vlan); | |
1790 | } | |
1791 | ||
1792 | if (src && ap_isolation_enabled) { | |
c018ad3d | 1793 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1794 | if (!tt_local_entry || |
1795 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1796 | goto out; |
1797 | } | |
7aadf889 | 1798 | |
c018ad3d | 1799 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1800 | if (!tt_global_entry) |
7b36e8ee | 1801 | goto out; |
7aadf889 | 1802 | |
3d393e47 | 1803 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1804 | * isolation |
1805 | */ | |
a513088d SE |
1806 | if (tt_local_entry && |
1807 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1808 | goto out; |
1809 | ||
db08e6e5 | 1810 | rcu_read_lock(); |
981d8900 | 1811 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
db08e6e5 | 1812 | /* found anything? */ |
981d8900 SE |
1813 | if (best_entry) |
1814 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1815 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1816 | orig_node = NULL; | |
1817 | rcu_read_unlock(); | |
981d8900 | 1818 | |
7b36e8ee | 1819 | out: |
3d393e47 | 1820 | if (tt_global_entry) |
a513088d | 1821 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1822 | if (tt_local_entry) |
a513088d | 1823 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1824 | |
7b36e8ee | 1825 | return orig_node; |
c6c8fea2 | 1826 | } |
a73105b8 | 1827 | |
ced72933 AQ |
1828 | /** |
1829 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1830 | * to the given orig_node | |
1831 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1832 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1833 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1834 | * |
1835 | * This function computes the checksum for the global table corresponding to a | |
1836 | * specific originator. In particular, the checksum is computed as follows: For | |
1837 | * each client connected to the originator the CRC32C of the MAC address and the | |
1838 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1839 | * together. | |
1840 | * | |
1841 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1842 | * produce a unique hash of the table, but since the order which is used to feed | |
1843 | * the CRC32C function affects the result and since every node in the network | |
1844 | * probably sorts the clients differently, the hash function cannot be directly | |
1845 | * computed over the entire table. Hence the CRC32C is used only on | |
1846 | * the single client entry, while all the results are then xor'ed together | |
1847 | * because the XOR operation can combine them all while trying to reduce the | |
1848 | * noise as much as possible. | |
1849 | * | |
1850 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1851 | */ |
1852 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1853 | struct batadv_orig_node *orig_node, |
1854 | unsigned short vid) | |
a73105b8 | 1855 | { |
807736f6 | 1856 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1857 | struct batadv_tt_common_entry *tt_common; |
1858 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1859 | struct hlist_head *head; |
0ffa9e8d | 1860 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1861 | |
1862 | for (i = 0; i < hash->size; i++) { | |
1863 | head = &hash->table[i]; | |
1864 | ||
1865 | rcu_read_lock(); | |
b67bfe0d | 1866 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1867 | tt_global = container_of(tt_common, |
1868 | struct batadv_tt_global_entry, | |
1869 | common); | |
7ea7b4a1 AQ |
1870 | /* compute the CRC only for entries belonging to the |
1871 | * VLAN identified by the vid passed as parameter | |
1872 | */ | |
1873 | if (tt_common->vid != vid) | |
1874 | continue; | |
1875 | ||
db08e6e5 SW |
1876 | /* Roaming clients are in the global table for |
1877 | * consistency only. They don't have to be | |
1878 | * taken into account while computing the | |
1879 | * global crc | |
1880 | */ | |
acd34afa | 1881 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1882 | continue; |
30cfd02b AQ |
1883 | /* Temporary clients have not been announced yet, so |
1884 | * they have to be skipped while computing the global | |
1885 | * crc | |
1886 | */ | |
1887 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1888 | continue; | |
db08e6e5 SW |
1889 | |
1890 | /* find out if this global entry is announced by this | |
1891 | * originator | |
1892 | */ | |
56303d34 | 1893 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1894 | orig_node)) |
db08e6e5 SW |
1895 | continue; |
1896 | ||
0ffa9e8d AQ |
1897 | crc_tmp = crc32c(0, &tt_common->vid, |
1898 | sizeof(tt_common->vid)); | |
1899 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 AQ |
1900 | } |
1901 | rcu_read_unlock(); | |
1902 | } | |
1903 | ||
ced72933 | 1904 | return crc; |
a73105b8 AQ |
1905 | } |
1906 | ||
ced72933 AQ |
1907 | /** |
1908 | * batadv_tt_local_crc - calculates the checksum of the local table | |
1909 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 1910 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1911 | * |
1912 | * For details about the computation, please refer to the documentation for | |
1913 | * batadv_tt_global_crc(). | |
1914 | * | |
1915 | * Returns the checksum of the local table | |
ced72933 | 1916 | */ |
7ea7b4a1 AQ |
1917 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
1918 | unsigned short vid) | |
a73105b8 | 1919 | { |
807736f6 | 1920 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1921 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 1922 | struct hlist_head *head; |
0ffa9e8d | 1923 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1924 | |
1925 | for (i = 0; i < hash->size; i++) { | |
1926 | head = &hash->table[i]; | |
1927 | ||
1928 | rcu_read_lock(); | |
b67bfe0d | 1929 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
1930 | /* compute the CRC only for entries belonging to the |
1931 | * VLAN identified by vid | |
1932 | */ | |
1933 | if (tt_common->vid != vid) | |
1934 | continue; | |
1935 | ||
058d0e26 | 1936 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1937 | * account while computing the CRC |
1938 | */ | |
acd34afa | 1939 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1940 | continue; |
ced72933 | 1941 | |
0ffa9e8d AQ |
1942 | crc_tmp = crc32c(0, &tt_common->vid, |
1943 | sizeof(tt_common->vid)); | |
1944 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 | 1945 | } |
a73105b8 AQ |
1946 | rcu_read_unlock(); |
1947 | } | |
1948 | ||
ced72933 | 1949 | return crc; |
a73105b8 AQ |
1950 | } |
1951 | ||
56303d34 | 1952 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1953 | { |
56303d34 | 1954 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1955 | |
807736f6 | 1956 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1957 | |
807736f6 | 1958 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1959 | list_del(&node->list); |
1960 | kfree(node); | |
1961 | } | |
1962 | ||
807736f6 | 1963 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1964 | } |
1965 | ||
56303d34 SE |
1966 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1967 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
1968 | const void *tt_buff, |
1969 | uint16_t tt_buff_len) | |
a73105b8 | 1970 | { |
a73105b8 | 1971 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
1972 | * last OGM (the OGM could carry no changes) |
1973 | */ | |
a73105b8 AQ |
1974 | spin_lock_bh(&orig_node->tt_buff_lock); |
1975 | if (tt_buff_len > 0) { | |
1976 | kfree(orig_node->tt_buff); | |
1977 | orig_node->tt_buff_len = 0; | |
1978 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1979 | if (orig_node->tt_buff) { | |
1980 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1981 | orig_node->tt_buff_len = tt_buff_len; | |
1982 | } | |
1983 | } | |
1984 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1985 | } | |
1986 | ||
56303d34 | 1987 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1988 | { |
56303d34 | 1989 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1990 | |
807736f6 SE |
1991 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1992 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1993 | if (batadv_has_timed_out(node->issued_at, |
1994 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1995 | list_del(&node->list); |
1996 | kfree(node); | |
1997 | } | |
1998 | } | |
807736f6 | 1999 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2000 | } |
2001 | ||
2002 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2003 | * has already been issued for this orig_node, NULL otherwise |
2004 | */ | |
56303d34 SE |
2005 | static struct batadv_tt_req_node * |
2006 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2007 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2008 | { |
56303d34 | 2009 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2010 | |
807736f6 SE |
2011 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2012 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2013 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2014 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2015 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2016 | goto unlock; |
2017 | } | |
2018 | ||
2019 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2020 | if (!tt_req_node) | |
2021 | goto unlock; | |
2022 | ||
2023 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
2024 | tt_req_node->issued_at = jiffies; | |
2025 | ||
807736f6 | 2026 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2027 | unlock: |
807736f6 | 2028 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2029 | return tt_req_node; |
2030 | } | |
2031 | ||
335fbe0f ML |
2032 | /** |
2033 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2034 | * @entry_ptr: to be checked local tt entry | |
2035 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2036 | * | |
2037 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2038 | */ | |
2039 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2040 | { |
56303d34 | 2041 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2042 | |
acd34afa | 2043 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2044 | return 0; |
2045 | return 1; | |
2046 | } | |
2047 | ||
a513088d SE |
2048 | static int batadv_tt_global_valid(const void *entry_ptr, |
2049 | const void *data_ptr) | |
a73105b8 | 2050 | { |
56303d34 SE |
2051 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2052 | const struct batadv_tt_global_entry *tt_global_entry; | |
2053 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2054 | |
30cfd02b AQ |
2055 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2056 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2057 | return 0; |
2058 | ||
56303d34 SE |
2059 | tt_global_entry = container_of(tt_common_entry, |
2060 | struct batadv_tt_global_entry, | |
48100bac AQ |
2061 | common); |
2062 | ||
a513088d | 2063 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2064 | } |
2065 | ||
335fbe0f | 2066 | /** |
7ea7b4a1 AQ |
2067 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2068 | * specified tt hash | |
335fbe0f ML |
2069 | * @bat_priv: the bat priv with all the soft interface information |
2070 | * @hash: hash table containing the tt entries | |
2071 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2072 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2073 | * @valid_cb: function to filter tt change entries |
2074 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2075 | */ |
7ea7b4a1 AQ |
2076 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2077 | struct batadv_hashtable *hash, | |
2078 | void *tvlv_buff, uint16_t tt_len, | |
2079 | int (*valid_cb)(const void *, const void *), | |
2080 | void *cb_data) | |
a73105b8 | 2081 | { |
56303d34 | 2082 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2083 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2084 | struct hlist_head *head; |
335fbe0f | 2085 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2086 | uint32_t i; |
a73105b8 | 2087 | |
298e6e68 | 2088 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2089 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2090 | |
2091 | rcu_read_lock(); | |
2092 | for (i = 0; i < hash->size; i++) { | |
2093 | head = &hash->table[i]; | |
2094 | ||
b67bfe0d | 2095 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2096 | head, hash_entry) { |
335fbe0f | 2097 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2098 | break; |
2099 | ||
48100bac | 2100 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2101 | continue; |
2102 | ||
48100bac AQ |
2103 | memcpy(tt_change->addr, tt_common_entry->addr, |
2104 | ETH_ALEN); | |
27b37ebf | 2105 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2106 | tt_change->vid = htons(tt_common_entry->vid); |
335fbe0f | 2107 | tt_change->reserved = 0; |
a73105b8 | 2108 | |
335fbe0f | 2109 | tt_num_entries++; |
a73105b8 AQ |
2110 | tt_change++; |
2111 | } | |
2112 | } | |
2113 | rcu_read_unlock(); | |
7ea7b4a1 | 2114 | } |
a73105b8 | 2115 | |
7ea7b4a1 AQ |
2116 | /** |
2117 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2118 | * @orig_node: originator for which the CRCs have to be checked | |
2119 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2120 | * @num_vlan: number of tvlv VLAN entries | |
2121 | * @create: if true, create VLAN objects if not found | |
2122 | * | |
2123 | * Return true if all the received CRCs match the locally stored ones, false | |
2124 | * otherwise | |
2125 | */ | |
2126 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2127 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2128 | uint16_t num_vlan) | |
2129 | { | |
2130 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2131 | struct batadv_orig_node_vlan *vlan; | |
2132 | int i; | |
2133 | ||
2134 | /* check if each received CRC matches the locally stored one */ | |
2135 | for (i = 0; i < num_vlan; i++) { | |
2136 | tt_vlan_tmp = tt_vlan + i; | |
2137 | ||
2138 | /* if orig_node is a backbone node for this VLAN, don't check | |
2139 | * the CRC as we ignore all the global entries over it | |
2140 | */ | |
2141 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2142 | orig_node->orig, |
2143 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2144 | continue; |
2145 | ||
2146 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2147 | ntohs(tt_vlan_tmp->vid)); | |
2148 | if (!vlan) | |
2149 | return false; | |
2150 | ||
2151 | if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) | |
2152 | return false; | |
2153 | } | |
2154 | ||
2155 | return true; | |
2156 | } | |
2157 | ||
2158 | /** | |
2159 | * batadv_tt_local_update_crc - update all the local CRCs | |
2160 | * @bat_priv: the bat priv with all the soft interface information | |
2161 | */ | |
2162 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2163 | { | |
2164 | struct batadv_softif_vlan *vlan; | |
2165 | ||
2166 | /* recompute the global CRC for each VLAN */ | |
2167 | rcu_read_lock(); | |
2168 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2169 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2170 | } | |
2171 | rcu_read_unlock(); | |
2172 | } | |
2173 | ||
2174 | /** | |
2175 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2176 | * @bat_priv: the bat priv with all the soft interface information | |
2177 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2178 | */ | |
2179 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2180 | struct batadv_orig_node *orig_node) | |
2181 | { | |
2182 | struct batadv_orig_node_vlan *vlan; | |
2183 | uint32_t crc; | |
2184 | ||
2185 | /* recompute the global CRC for each VLAN */ | |
2186 | rcu_read_lock(); | |
2187 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2188 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2189 | * the CRC as we ignore all the global entries over it | |
2190 | */ | |
cfd4f757 AQ |
2191 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2192 | vlan->vid)) | |
7ea7b4a1 AQ |
2193 | continue; |
2194 | ||
2195 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2196 | vlan->tt.crc = crc; | |
2197 | } | |
2198 | rcu_read_unlock(); | |
a73105b8 AQ |
2199 | } |
2200 | ||
ced72933 AQ |
2201 | /** |
2202 | * batadv_send_tt_request - send a TT Request message to a given node | |
2203 | * @bat_priv: the bat priv with all the soft interface information | |
2204 | * @dst_orig_node: the destination of the message | |
2205 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2206 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2207 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2208 | * @full_table: ask for the entire translation table if true, while only for the |
2209 | * last TT diff otherwise | |
2210 | */ | |
56303d34 SE |
2211 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2212 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2213 | uint8_t ttvn, |
2214 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2215 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2216 | { |
335fbe0f | 2217 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2218 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2219 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2220 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2221 | bool ret = false; |
7ea7b4a1 | 2222 | int i, size; |
a73105b8 | 2223 | |
e5d89254 | 2224 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2225 | if (!primary_if) |
2226 | goto out; | |
2227 | ||
2228 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2229 | * reply from the same orig_node yet |
2230 | */ | |
a513088d | 2231 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2232 | if (!tt_req_node) |
2233 | goto out; | |
2234 | ||
7ea7b4a1 AQ |
2235 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2236 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2237 | if (!tvlv_tt_data) |
a73105b8 AQ |
2238 | goto out; |
2239 | ||
335fbe0f ML |
2240 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2241 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2242 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2243 | ||
2244 | /* send all the CRCs within the request. This is needed by intermediate | |
2245 | * nodes to ensure they have the correct table before replying | |
2246 | */ | |
2247 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2248 | for (i = 0; i < num_vlan; i++) { | |
2249 | tt_vlan_req->vid = tt_vlan->vid; | |
2250 | tt_vlan_req->crc = tt_vlan->crc; | |
2251 | ||
2252 | tt_vlan_req++; | |
2253 | tt_vlan++; | |
2254 | } | |
a73105b8 AQ |
2255 | |
2256 | if (full_table) | |
335fbe0f | 2257 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2258 | |
bb351ba0 | 2259 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2260 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2261 | |
d69909d2 | 2262 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2263 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2264 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2265 | tvlv_tt_data, size); |
335fbe0f | 2266 | ret = true; |
a73105b8 AQ |
2267 | |
2268 | out: | |
a73105b8 | 2269 | if (primary_if) |
e5d89254 | 2270 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2271 | if (ret && tt_req_node) { |
807736f6 | 2272 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2273 | list_del(&tt_req_node->list); |
807736f6 | 2274 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2275 | kfree(tt_req_node); |
2276 | } | |
335fbe0f | 2277 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2278 | return ret; |
2279 | } | |
2280 | ||
335fbe0f ML |
2281 | /** |
2282 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2283 | * node's translation table | |
2284 | * @bat_priv: the bat priv with all the soft interface information | |
2285 | * @tt_data: tt data containing the tt request information | |
2286 | * @req_src: mac address of tt request sender | |
2287 | * @req_dst: mac address of tt request recipient | |
2288 | * | |
2289 | * Returns true if tt request reply was sent, false otherwise. | |
2290 | */ | |
2291 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2292 | struct batadv_tvlv_tt_data *tt_data, | |
2293 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2294 | { |
170173bf | 2295 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2296 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2297 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2298 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2299 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2300 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2301 | uint8_t orig_ttvn, req_ttvn; |
2302 | uint16_t tvlv_len; | |
2303 | int32_t tt_len; | |
a73105b8 | 2304 | |
39c75a51 | 2305 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2306 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2307 | req_src, tt_data->ttvn, req_dst, |
2308 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2309 | |
2310 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2311 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2312 | if (!req_dst_orig_node) |
2313 | goto out; | |
2314 | ||
335fbe0f | 2315 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2316 | if (!res_dst_orig_node) |
2317 | goto out; | |
2318 | ||
a73105b8 | 2319 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2320 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2321 | |
7ea7b4a1 | 2322 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2323 | /* this node doesn't have the requested data */ |
a73105b8 | 2324 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2325 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2326 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2327 | goto out; |
2328 | ||
015758d0 | 2329 | /* If the full table has been explicitly requested */ |
335fbe0f | 2330 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2331 | !req_dst_orig_node->tt_buff) |
2332 | full_table = true; | |
2333 | else | |
2334 | full_table = false; | |
2335 | ||
335fbe0f ML |
2336 | /* TT fragmentation hasn't been implemented yet, so send as many |
2337 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2338 | */ |
a73105b8 AQ |
2339 | if (!full_table) { |
2340 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2341 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2342 | |
7ea7b4a1 AQ |
2343 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2344 | &tvlv_tt_data, | |
2345 | &tt_change, | |
2346 | &tt_len); | |
2347 | if (!tt_len) | |
a73105b8 AQ |
2348 | goto unlock; |
2349 | ||
a73105b8 | 2350 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2351 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2352 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2353 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2354 | } else { | |
7ea7b4a1 AQ |
2355 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2356 | * in the initial part | |
2357 | */ | |
2358 | tt_len = -1; | |
2359 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2360 | &tvlv_tt_data, | |
2361 | &tt_change, | |
2362 | &tt_len); | |
2363 | if (!tt_len) | |
a73105b8 | 2364 | goto out; |
7ea7b4a1 AQ |
2365 | |
2366 | /* fill the rest of the tvlv with the real TT entries */ | |
2367 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2368 | tt_change, tt_len, | |
2369 | batadv_tt_global_valid, | |
2370 | req_dst_orig_node); | |
a73105b8 AQ |
2371 | } |
2372 | ||
335fbe0f ML |
2373 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2374 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2375 | |
2376 | if (full_table) | |
335fbe0f | 2377 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2378 | |
39c75a51 | 2379 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2380 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2381 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2382 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2383 | |
d69909d2 | 2384 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2385 | |
335fbe0f | 2386 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2387 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2388 | tvlv_len); | |
e91ecfc6 | 2389 | |
335fbe0f | 2390 | ret = true; |
a73105b8 AQ |
2391 | goto out; |
2392 | ||
2393 | unlock: | |
2394 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2395 | ||
2396 | out: | |
2397 | if (res_dst_orig_node) | |
7d211efc | 2398 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2399 | if (req_dst_orig_node) |
7d211efc | 2400 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2401 | kfree(tvlv_tt_data); |
a73105b8 | 2402 | return ret; |
a73105b8 | 2403 | } |
96412690 | 2404 | |
335fbe0f ML |
2405 | /** |
2406 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2407 | * translation table | |
2408 | * @bat_priv: the bat priv with all the soft interface information | |
2409 | * @tt_data: tt data containing the tt request information | |
2410 | * @req_src: mac address of tt request sender | |
2411 | * | |
2412 | * Returns true if tt request reply was sent, false otherwise. | |
2413 | */ | |
2414 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2415 | struct batadv_tvlv_tt_data *tt_data, | |
2416 | uint8_t *req_src) | |
a73105b8 | 2417 | { |
335fbe0f | 2418 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2419 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2420 | struct batadv_tvlv_tt_change *tt_change; |
2421 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2422 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2423 | uint16_t tvlv_len; |
a73105b8 | 2424 | bool full_table; |
7ea7b4a1 | 2425 | int32_t tt_len; |
a73105b8 | 2426 | |
39c75a51 | 2427 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2428 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2429 | req_src, tt_data->ttvn, |
2430 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2431 | |
a70a9aa9 | 2432 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2433 | |
807736f6 | 2434 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2435 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2436 | |
335fbe0f | 2437 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2438 | if (!orig_node) |
2439 | goto out; | |
2440 | ||
e5d89254 | 2441 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2442 | if (!primary_if) |
2443 | goto out; | |
2444 | ||
2445 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2446 | * is too big send the whole local translation table |
2447 | */ | |
335fbe0f | 2448 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2449 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2450 | full_table = true; |
2451 | else | |
2452 | full_table = false; | |
2453 | ||
335fbe0f ML |
2454 | /* TT fragmentation hasn't been implemented yet, so send as many |
2455 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2456 | */ |
a73105b8 | 2457 | if (!full_table) { |
807736f6 | 2458 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2459 | |
7ea7b4a1 AQ |
2460 | tt_len = bat_priv->tt.last_changeset_len; |
2461 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2462 | &tvlv_tt_data, | |
2463 | &tt_change, | |
2464 | &tt_len); | |
2465 | if (!tt_len) | |
a73105b8 AQ |
2466 | goto unlock; |
2467 | ||
335fbe0f | 2468 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2469 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2470 | bat_priv->tt.last_changeset_len); |
2471 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2472 | } else { |
335fbe0f ML |
2473 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2474 | ||
7ea7b4a1 AQ |
2475 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2476 | * in the initial part | |
2477 | */ | |
2478 | tt_len = -1; | |
2479 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2480 | &tvlv_tt_data, | |
2481 | &tt_change, | |
2482 | &tt_len); | |
2483 | if (!tt_len) | |
a73105b8 | 2484 | goto out; |
7ea7b4a1 AQ |
2485 | |
2486 | /* fill the rest of the tvlv with the real TT entries */ | |
2487 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2488 | tt_change, tt_len, | |
2489 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2490 | } |
2491 | ||
335fbe0f ML |
2492 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2493 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2494 | |
2495 | if (full_table) | |
335fbe0f | 2496 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2497 | |
39c75a51 | 2498 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2499 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2500 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2501 | |
d69909d2 | 2502 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2503 | |
335fbe0f | 2504 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2505 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2506 | tvlv_len); | |
335fbe0f | 2507 | |
a73105b8 AQ |
2508 | goto out; |
2509 | ||
2510 | unlock: | |
807736f6 | 2511 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2512 | out: |
a70a9aa9 | 2513 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2514 | if (orig_node) |
7d211efc | 2515 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2516 | if (primary_if) |
e5d89254 | 2517 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2518 | kfree(tvlv_tt_data); |
2519 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2520 | return true; |
2521 | } | |
2522 | ||
335fbe0f ML |
2523 | /** |
2524 | * batadv_send_tt_response - send reply to tt request | |
2525 | * @bat_priv: the bat priv with all the soft interface information | |
2526 | * @tt_data: tt data containing the tt request information | |
2527 | * @req_src: mac address of tt request sender | |
2528 | * @req_dst: mac address of tt request recipient | |
2529 | * | |
2530 | * Returns true if tt request reply was sent, false otherwise. | |
2531 | */ | |
2532 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2533 | struct batadv_tvlv_tt_data *tt_data, | |
2534 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2535 | { |
cfd4f757 | 2536 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2537 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2538 | else |
335fbe0f ML |
2539 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2540 | req_src, req_dst); | |
a73105b8 AQ |
2541 | } |
2542 | ||
56303d34 SE |
2543 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2544 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2545 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2546 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2547 | { |
2548 | int i; | |
a513088d | 2549 | int roams; |
a73105b8 AQ |
2550 | |
2551 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2552 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2553 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2554 | batadv_tt_global_del(bat_priv, orig_node, |
2555 | (tt_change + i)->addr, | |
c018ad3d | 2556 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2557 | "tt removed by changes", |
2558 | roams); | |
08c36d3e | 2559 | } else { |
08c36d3e | 2560 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2561 | (tt_change + i)->addr, |
c018ad3d | 2562 | ntohs((tt_change + i)->vid), |
d4f44692 | 2563 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2564 | /* In case of problem while storing a |
2565 | * global_entry, we stop the updating | |
2566 | * procedure without committing the | |
2567 | * ttvn change. This will avoid to send | |
2568 | * corrupted data on tt_request | |
2569 | */ | |
2570 | return; | |
08c36d3e | 2571 | } |
a73105b8 | 2572 | } |
17071578 | 2573 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2574 | } |
2575 | ||
56303d34 | 2576 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2577 | struct batadv_tvlv_tt_change *tt_change, |
2578 | uint8_t ttvn, uint8_t *resp_src, | |
2579 | uint16_t num_entries) | |
a73105b8 | 2580 | { |
170173bf | 2581 | struct batadv_orig_node *orig_node; |
a73105b8 | 2582 | |
335fbe0f | 2583 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2584 | if (!orig_node) |
2585 | goto out; | |
2586 | ||
2587 | /* Purge the old table first.. */ | |
95fb130d AQ |
2588 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2589 | "Received full table"); | |
a73105b8 | 2590 | |
7ea7b4a1 AQ |
2591 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2592 | ttvn); | |
a73105b8 AQ |
2593 | |
2594 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2595 | kfree(orig_node->tt_buff); | |
2596 | orig_node->tt_buff_len = 0; | |
2597 | orig_node->tt_buff = NULL; | |
2598 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2599 | ||
7ea7b4a1 | 2600 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2601 | |
2602 | out: | |
2603 | if (orig_node) | |
7d211efc | 2604 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2605 | } |
2606 | ||
56303d34 SE |
2607 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2608 | struct batadv_orig_node *orig_node, | |
a513088d | 2609 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2610 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2611 | { |
a513088d SE |
2612 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2613 | tt_num_changes, ttvn); | |
a73105b8 | 2614 | |
e8cf234a AQ |
2615 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2616 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2617 | atomic_set(&orig_node->last_ttvn, ttvn); |
2618 | } | |
2619 | ||
c018ad3d AQ |
2620 | /** |
2621 | * batadv_is_my_client - check if a client is served by the local node | |
2622 | * @bat_priv: the bat priv with all the soft interface information | |
2623 | * @addr: the mac adress of the client to check | |
2624 | * @vid: VLAN identifier | |
2625 | * | |
2626 | * Returns true if the client is served by this node, false otherwise. | |
2627 | */ | |
2628 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2629 | unsigned short vid) | |
a73105b8 | 2630 | { |
170173bf | 2631 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2632 | bool ret = false; |
a73105b8 | 2633 | |
c018ad3d | 2634 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2635 | if (!tt_local_entry) |
2636 | goto out; | |
058d0e26 | 2637 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2638 | * consistency purpose) |
2639 | */ | |
7c1fd91d AQ |
2640 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2641 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2642 | goto out; |
7683fdc1 AQ |
2643 | ret = true; |
2644 | out: | |
a73105b8 | 2645 | if (tt_local_entry) |
a513088d | 2646 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2647 | return ret; |
a73105b8 AQ |
2648 | } |
2649 | ||
335fbe0f ML |
2650 | /** |
2651 | * batadv_handle_tt_response - process incoming tt reply | |
2652 | * @bat_priv: the bat priv with all the soft interface information | |
2653 | * @tt_data: tt data containing the tt request information | |
2654 | * @resp_src: mac address of tt reply sender | |
2655 | * @num_entries: number of tt change entries appended to the tt data | |
2656 | */ | |
2657 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2658 | struct batadv_tvlv_tt_data *tt_data, | |
2659 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2660 | { |
56303d34 SE |
2661 | struct batadv_tt_req_node *node, *safe; |
2662 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2663 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2664 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2665 | uint16_t change_offset; | |
a73105b8 | 2666 | |
39c75a51 | 2667 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2668 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2669 | resp_src, tt_data->ttvn, num_entries, |
2670 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2671 | |
335fbe0f | 2672 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2673 | if (!orig_node) |
2674 | goto out; | |
2675 | ||
a70a9aa9 AQ |
2676 | spin_lock_bh(&orig_node->tt_lock); |
2677 | ||
7ea7b4a1 AQ |
2678 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2679 | change_offset *= ntohs(tt_data->num_vlan); | |
2680 | change_offset += sizeof(*tt_data); | |
2681 | tvlv_ptr += change_offset; | |
2682 | ||
2683 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2684 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2685 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2686 | resp_src, num_entries); | |
96412690 | 2687 | } else { |
335fbe0f ML |
2688 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2689 | tt_data->ttvn, tt_change); | |
96412690 | 2690 | } |
a73105b8 | 2691 | |
a70a9aa9 | 2692 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2693 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2694 | |
2695 | spin_unlock_bh(&orig_node->tt_lock); | |
2696 | ||
a73105b8 | 2697 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2698 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2699 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2700 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2701 | continue; |
2702 | list_del(&node->list); | |
2703 | kfree(node); | |
2704 | } | |
7ea7b4a1 | 2705 | |
807736f6 | 2706 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2707 | out: |
2708 | if (orig_node) | |
7d211efc | 2709 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2710 | } |
2711 | ||
56303d34 | 2712 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2713 | { |
56303d34 | 2714 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2715 | |
807736f6 | 2716 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2717 | |
807736f6 | 2718 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2719 | list_del(&node->list); |
2720 | kfree(node); | |
2721 | } | |
2722 | ||
807736f6 | 2723 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2724 | } |
2725 | ||
56303d34 | 2726 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2727 | { |
56303d34 | 2728 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2729 | |
807736f6 SE |
2730 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2731 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2732 | if (!batadv_has_timed_out(node->first_time, |
2733 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2734 | continue; |
2735 | ||
2736 | list_del(&node->list); | |
2737 | kfree(node); | |
2738 | } | |
807736f6 | 2739 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2740 | } |
2741 | ||
2742 | /* This function checks whether the client already reached the | |
2743 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2744 | * will not be sent. | |
2745 | * | |
9cfc7bd6 SE |
2746 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2747 | */ | |
56303d34 | 2748 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2749 | uint8_t *client) |
cc47f66e | 2750 | { |
56303d34 | 2751 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2752 | bool ret = false; |
2753 | ||
807736f6 | 2754 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2755 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2756 | * reply from the same orig_node yet |
2757 | */ | |
807736f6 | 2758 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2759 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2760 | continue; |
2761 | ||
1eda58bf | 2762 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2763 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2764 | continue; |
2765 | ||
3e34819e | 2766 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2767 | /* Sorry, you roamed too many times! */ |
2768 | goto unlock; | |
2769 | ret = true; | |
2770 | break; | |
2771 | } | |
2772 | ||
2773 | if (!ret) { | |
2774 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2775 | if (!tt_roam_node) | |
2776 | goto unlock; | |
2777 | ||
2778 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2779 | atomic_set(&tt_roam_node->counter, |
2780 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2781 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2782 | ||
807736f6 | 2783 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2784 | ret = true; |
2785 | } | |
2786 | ||
2787 | unlock: | |
807736f6 | 2788 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2789 | return ret; |
2790 | } | |
2791 | ||
c018ad3d AQ |
2792 | /** |
2793 | * batadv_send_roam_adv - send a roaming advertisement message | |
2794 | * @bat_priv: the bat priv with all the soft interface information | |
2795 | * @client: mac address of the roaming client | |
2796 | * @vid: VLAN identifier | |
2797 | * @orig_node: message destination | |
2798 | * | |
2799 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2800 | * client. This is done to inform the node that from now on all traffic destined | |
2801 | * for this particular roamed client has to be forwarded to the sender of the | |
2802 | * roaming message. | |
2803 | */ | |
56303d34 | 2804 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2805 | unsigned short vid, |
56303d34 | 2806 | struct batadv_orig_node *orig_node) |
cc47f66e | 2807 | { |
56303d34 | 2808 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2809 | struct batadv_tvlv_roam_adv tvlv_roam; |
2810 | ||
2811 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2812 | if (!primary_if) | |
2813 | goto out; | |
cc47f66e AQ |
2814 | |
2815 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2816 | * already roamed to us too many times |
2817 | */ | |
a513088d | 2818 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2819 | goto out; |
2820 | ||
39c75a51 | 2821 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2822 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2823 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2824 | |
d69909d2 | 2825 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2826 | |
122edaa0 | 2827 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2828 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2829 | |
2830 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2831 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2832 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2833 | |
2834 | out: | |
122edaa0 ML |
2835 | if (primary_if) |
2836 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2837 | } |
2838 | ||
a513088d | 2839 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2840 | { |
56303d34 | 2841 | struct delayed_work *delayed_work; |
807736f6 | 2842 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2843 | struct batadv_priv *bat_priv; |
2844 | ||
2845 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2846 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2847 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2848 | |
a513088d | 2849 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2850 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2851 | batadv_tt_req_purge(bat_priv); |
2852 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2853 | |
72414442 AQ |
2854 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2855 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2856 | } |
cc47f66e | 2857 | |
56303d34 | 2858 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2859 | { |
e1bf0c14 ML |
2860 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2861 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
2862 | ||
807736f6 | 2863 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2864 | |
a513088d SE |
2865 | batadv_tt_local_table_free(bat_priv); |
2866 | batadv_tt_global_table_free(bat_priv); | |
2867 | batadv_tt_req_list_free(bat_priv); | |
2868 | batadv_tt_changes_list_free(bat_priv); | |
2869 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2870 | |
807736f6 | 2871 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2872 | } |
058d0e26 | 2873 | |
7ea7b4a1 AQ |
2874 | /** |
2875 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
2876 | * table and possibly count them in the TT size | |
2877 | * @bat_priv: the bat priv with all the soft interface information | |
2878 | * @flags: the flag to switch | |
2879 | * @enable: whether to set or unset the flag | |
2880 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 2881 | */ |
7ea7b4a1 AQ |
2882 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
2883 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 2884 | { |
7ea7b4a1 AQ |
2885 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
2886 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 2887 | uint16_t changed_num = 0; |
058d0e26 | 2888 | struct hlist_head *head; |
7ea7b4a1 | 2889 | uint32_t i; |
058d0e26 AQ |
2890 | |
2891 | if (!hash) | |
7ea7b4a1 | 2892 | return; |
058d0e26 AQ |
2893 | |
2894 | for (i = 0; i < hash->size; i++) { | |
2895 | head = &hash->table[i]; | |
2896 | ||
2897 | rcu_read_lock(); | |
b67bfe0d | 2898 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2899 | head, hash_entry) { |
697f2531 AQ |
2900 | if (enable) { |
2901 | if ((tt_common_entry->flags & flags) == flags) | |
2902 | continue; | |
2903 | tt_common_entry->flags |= flags; | |
2904 | } else { | |
2905 | if (!(tt_common_entry->flags & flags)) | |
2906 | continue; | |
2907 | tt_common_entry->flags &= ~flags; | |
2908 | } | |
2909 | changed_num++; | |
7ea7b4a1 AQ |
2910 | |
2911 | if (!count) | |
2912 | continue; | |
2913 | ||
2914 | batadv_tt_local_size_inc(bat_priv, | |
2915 | tt_common_entry->vid); | |
058d0e26 AQ |
2916 | } |
2917 | rcu_read_unlock(); | |
2918 | } | |
058d0e26 AQ |
2919 | } |
2920 | ||
acd34afa | 2921 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2922 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2923 | { |
807736f6 | 2924 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2925 | struct batadv_tt_common_entry *tt_common; |
2926 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 2927 | struct hlist_node *node_tmp; |
058d0e26 AQ |
2928 | struct hlist_head *head; |
2929 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2930 | uint32_t i; |
058d0e26 AQ |
2931 | |
2932 | if (!hash) | |
2933 | return; | |
2934 | ||
2935 | for (i = 0; i < hash->size; i++) { | |
2936 | head = &hash->table[i]; | |
2937 | list_lock = &hash->list_locks[i]; | |
2938 | ||
2939 | spin_lock_bh(list_lock); | |
b67bfe0d | 2940 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
2941 | hash_entry) { |
2942 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2943 | continue; |
2944 | ||
39c75a51 | 2945 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2946 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
2947 | tt_common->addr, | |
2948 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 2949 | |
7ea7b4a1 | 2950 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 2951 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
2952 | tt_local = container_of(tt_common, |
2953 | struct batadv_tt_local_entry, | |
2954 | common); | |
2955 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2956 | } |
2957 | spin_unlock_bh(list_lock); | |
2958 | } | |
058d0e26 AQ |
2959 | } |
2960 | ||
e1bf0c14 ML |
2961 | /** |
2962 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
2963 | * have been queued in the time since the last commit | |
2964 | * @bat_priv: the bat priv with all the soft interface information | |
2965 | */ | |
2966 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
058d0e26 | 2967 | { |
a70a9aa9 AQ |
2968 | spin_lock_bh(&bat_priv->tt.commit_lock); |
2969 | ||
e1bf0c14 ML |
2970 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
2971 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
2972 | batadv_tt_tvlv_container_update(bat_priv); | |
a70a9aa9 | 2973 | goto out; |
e1bf0c14 | 2974 | } |
be9aa4c1 | 2975 | |
7ea7b4a1 | 2976 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 2977 | |
a513088d | 2978 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 2979 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
2980 | |
2981 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2982 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2983 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2984 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2985 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2986 | |
2987 | /* reset the sending counter */ | |
807736f6 | 2988 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 2989 | batadv_tt_tvlv_container_update(bat_priv); |
a70a9aa9 AQ |
2990 | |
2991 | out: | |
2992 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
058d0e26 | 2993 | } |
59b699cd | 2994 | |
56303d34 | 2995 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 2996 | uint8_t *dst, unsigned short vid) |
59b699cd | 2997 | { |
56303d34 SE |
2998 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2999 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3000 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3001 | bool ret = false; |
59b699cd | 3002 | |
b8cbd81d AQ |
3003 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3004 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3005 | goto out; |
59b699cd | 3006 | |
b8cbd81d | 3007 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3008 | if (!tt_local_entry) |
3009 | goto out; | |
3010 | ||
b8cbd81d | 3011 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3012 | if (!tt_global_entry) |
3013 | goto out; | |
3014 | ||
1f129fef | 3015 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3016 | goto out; |
3017 | ||
5870adc6 | 3018 | ret = true; |
59b699cd AQ |
3019 | |
3020 | out: | |
b8cbd81d AQ |
3021 | if (vlan) |
3022 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3023 | if (tt_global_entry) |
a513088d | 3024 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3025 | if (tt_local_entry) |
a513088d | 3026 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3027 | return ret; |
3028 | } | |
a943cac1 | 3029 | |
e1bf0c14 ML |
3030 | /** |
3031 | * batadv_tt_update_orig - update global translation table with new tt | |
3032 | * information received via ogms | |
3033 | * @bat_priv: the bat priv with all the soft interface information | |
3034 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3035 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3036 | * @tt_num_vlan: number of tvlv VLAN entries | |
3037 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3038 | * @tt_num_changes: number of tt changes inside the tt buffer |
3039 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3040 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3041 | */ |
3042 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3043 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3044 | const void *tt_buff, uint16_t tt_num_vlan, |
3045 | struct batadv_tvlv_tt_change *tt_change, | |
3046 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3047 | { |
3048 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3049 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 ML |
3050 | bool full_table = true; |
3051 | ||
7ea7b4a1 | 3052 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
17071578 | 3053 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3054 | * increased by one -> we can apply the attached changes |
3055 | */ | |
17071578 AQ |
3056 | if ((!orig_node->tt_initialised && ttvn == 1) || |
3057 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 3058 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3059 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3060 | * times. | |
9cfc7bd6 SE |
3061 | * In this case send a tt request |
3062 | */ | |
a943cac1 ML |
3063 | if (!tt_num_changes) { |
3064 | full_table = false; | |
3065 | goto request_table; | |
3066 | } | |
3067 | ||
a70a9aa9 AQ |
3068 | spin_lock_bh(&orig_node->tt_lock); |
3069 | ||
335fbe0f | 3070 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 3071 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3072 | ttvn, tt_change); |
a943cac1 ML |
3073 | |
3074 | /* Even if we received the precomputed crc with the OGM, we | |
3075 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3076 | * in the global table |
3077 | */ | |
7ea7b4a1 | 3078 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3079 | |
a70a9aa9 AQ |
3080 | spin_unlock_bh(&orig_node->tt_lock); |
3081 | ||
a943cac1 ML |
3082 | /* The ttvn alone is not enough to guarantee consistency |
3083 | * because a single value could represent different states | |
3084 | * (due to the wrap around). Thus a node has to check whether | |
3085 | * the resulting table (after applying the changes) is still | |
3086 | * consistent or not. E.g. a node could disconnect while its | |
3087 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3088 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3089 | * inconsistency |
3090 | */ | |
7ea7b4a1 AQ |
3091 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3092 | tt_num_vlan)) | |
a943cac1 | 3093 | goto request_table; |
a943cac1 ML |
3094 | } else { |
3095 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3096 | * in sync anymore -> request fresh tt data |
3097 | */ | |
17071578 | 3098 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3099 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3100 | tt_num_vlan)) { | |
a943cac1 | 3101 | request_table: |
39c75a51 | 3102 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3103 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3104 | orig_node->orig, ttvn, orig_ttvn, | |
3105 | tt_num_changes); | |
a513088d | 3106 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3107 | tt_vlan, tt_num_vlan, |
3108 | full_table); | |
a943cac1 ML |
3109 | return; |
3110 | } | |
3111 | } | |
3112 | } | |
3275e7cc | 3113 | |
c018ad3d AQ |
3114 | /** |
3115 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3116 | * @bat_priv: the bat priv with all the soft interface information | |
3117 | * @addr: the mac address of the client to check | |
3118 | * @vid: VLAN identifier | |
3119 | * | |
3120 | * Returns true if we know that the client has moved from its old originator | |
3121 | * to another one. This entry is still kept for consistency purposes and will be | |
3122 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3123 | */ |
56303d34 | 3124 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3125 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3126 | { |
56303d34 | 3127 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3128 | bool ret = false; |
3129 | ||
c018ad3d | 3130 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3131 | if (!tt_global_entry) |
3132 | goto out; | |
3133 | ||
c1d07431 | 3134 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3135 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3136 | out: |
3137 | return ret; | |
3138 | } | |
30cfd02b | 3139 | |
7c1fd91d AQ |
3140 | /** |
3141 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3142 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3143 | * @addr: the mac address of the local client to query |
3144 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3145 | * |
3146 | * Returns true if the local client is known to be roaming (it is not served by | |
3147 | * this node anymore) or not. If yes, the client is still present in the table | |
3148 | * to keep the latter consistent with the node TTVN | |
3149 | */ | |
3150 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3151 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3152 | { |
3153 | struct batadv_tt_local_entry *tt_local_entry; | |
3154 | bool ret = false; | |
3155 | ||
c018ad3d | 3156 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3157 | if (!tt_local_entry) |
3158 | goto out; | |
3159 | ||
3160 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3161 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3162 | out: | |
3163 | return ret; | |
7c1fd91d AQ |
3164 | } |
3165 | ||
30cfd02b AQ |
3166 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3167 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3168 | const unsigned char *addr, |
16052789 | 3169 | unsigned short vid) |
30cfd02b AQ |
3170 | { |
3171 | bool ret = false; | |
3172 | ||
16052789 | 3173 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3174 | BATADV_TT_CLIENT_TEMP, |
3175 | atomic_read(&orig_node->last_ttvn))) | |
3176 | goto out; | |
3177 | ||
3178 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3179 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3180 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3181 | ret = true; |
3182 | out: | |
3183 | return ret; | |
3184 | } | |
e1bf0c14 ML |
3185 | |
3186 | /** | |
3187 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3188 | * @bat_priv: the bat priv with all the soft interface information | |
3189 | * @orig: the orig_node of the ogm | |
3190 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3191 | * @tvlv_value: tvlv buffer containing the gateway data | |
3192 | * @tvlv_value_len: tvlv buffer length | |
3193 | */ | |
3194 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3195 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3196 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3197 | uint16_t tvlv_value_len) |
3198 | { | |
7ea7b4a1 AQ |
3199 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3200 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3201 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3202 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3203 | |
3204 | if (tvlv_value_len < sizeof(*tt_data)) | |
3205 | return; | |
3206 | ||
3207 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3208 | tvlv_value_len -= sizeof(*tt_data); | |
3209 | ||
7ea7b4a1 AQ |
3210 | num_vlan = ntohs(tt_data->num_vlan); |
3211 | ||
3212 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3213 | return; | |
3214 | ||
3215 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3216 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3217 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3218 | ||
298e6e68 | 3219 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3220 | |
7ea7b4a1 AQ |
3221 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3222 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3223 | } |
3224 | ||
335fbe0f ML |
3225 | /** |
3226 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3227 | * container | |
3228 | * @bat_priv: the bat priv with all the soft interface information | |
3229 | * @src: mac address of tt tvlv sender | |
3230 | * @dst: mac address of tt tvlv recipient | |
3231 | * @tvlv_value: tvlv buffer containing the tt data | |
3232 | * @tvlv_value_len: tvlv buffer length | |
3233 | * | |
3234 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3235 | * otherwise. | |
3236 | */ | |
3237 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3238 | uint8_t *src, uint8_t *dst, | |
3239 | void *tvlv_value, | |
3240 | uint16_t tvlv_value_len) | |
3241 | { | |
3242 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3243 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3244 | char tt_flag; |
3245 | bool ret; | |
3246 | ||
3247 | if (tvlv_value_len < sizeof(*tt_data)) | |
3248 | return NET_RX_SUCCESS; | |
3249 | ||
3250 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3251 | tvlv_value_len -= sizeof(*tt_data); | |
3252 | ||
7ea7b4a1 AQ |
3253 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3254 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3255 | ||
3256 | if (tvlv_value_len < tt_vlan_len) | |
3257 | return NET_RX_SUCCESS; | |
3258 | ||
3259 | tvlv_value_len -= tt_vlan_len; | |
3260 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3261 | |
3262 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3263 | case BATADV_TT_REQUEST: | |
3264 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3265 | ||
3266 | /* If this node cannot provide a TT response the tt_request is | |
3267 | * forwarded | |
3268 | */ | |
3269 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3270 | if (!ret) { | |
3271 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3272 | tt_flag = 'F'; | |
3273 | else | |
3274 | tt_flag = '.'; | |
3275 | ||
3276 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3277 | "Routing TT_REQUEST to %pM [%c]\n", | |
3278 | dst, tt_flag); | |
3279 | /* tvlv API will re-route the packet */ | |
3280 | return NET_RX_DROP; | |
3281 | } | |
3282 | break; | |
3283 | case BATADV_TT_RESPONSE: | |
3284 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3285 | ||
3286 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3287 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3288 | src, tt_num_entries); |
335fbe0f ML |
3289 | return NET_RX_SUCCESS; |
3290 | } | |
3291 | ||
3292 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3293 | tt_flag = 'F'; | |
3294 | else | |
3295 | tt_flag = '.'; | |
3296 | ||
3297 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3298 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3299 | ||
3300 | /* tvlv API will re-route the packet */ | |
3301 | return NET_RX_DROP; | |
3302 | } | |
3303 | ||
3304 | return NET_RX_SUCCESS; | |
3305 | } | |
3306 | ||
122edaa0 ML |
3307 | /** |
3308 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3309 | * @bat_priv: the bat priv with all the soft interface information | |
3310 | * @src: mac address of tt tvlv sender | |
3311 | * @dst: mac address of tt tvlv recipient | |
3312 | * @tvlv_value: tvlv buffer containing the tt data | |
3313 | * @tvlv_value_len: tvlv buffer length | |
3314 | * | |
3315 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3316 | * otherwise. | |
3317 | */ | |
3318 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3319 | uint8_t *src, uint8_t *dst, | |
3320 | void *tvlv_value, | |
3321 | uint16_t tvlv_value_len) | |
3322 | { | |
3323 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3324 | struct batadv_orig_node *orig_node = NULL; | |
3325 | ||
3326 | /* If this node is not the intended recipient of the | |
3327 | * roaming advertisement the packet is forwarded | |
3328 | * (the tvlv API will re-route the packet). | |
3329 | */ | |
3330 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3331 | return NET_RX_DROP; | |
3332 | ||
122edaa0 ML |
3333 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3334 | goto out; | |
3335 | ||
3336 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3337 | if (!orig_node) | |
3338 | goto out; | |
3339 | ||
3340 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3341 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3342 | ||
3343 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3344 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3345 | src, roaming_adv->client); | |
3346 | ||
3347 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3348 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3349 | atomic_read(&orig_node->last_ttvn) + 1); |
3350 | ||
3351 | out: | |
3352 | if (orig_node) | |
3353 | batadv_orig_node_free_ref(orig_node); | |
3354 | return NET_RX_SUCCESS; | |
3355 | } | |
3356 | ||
e1bf0c14 ML |
3357 | /** |
3358 | * batadv_tt_init - initialise the translation table internals | |
3359 | * @bat_priv: the bat priv with all the soft interface information | |
3360 | * | |
3361 | * Return 0 on success or negative error number in case of failure. | |
3362 | */ | |
3363 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3364 | { | |
3365 | int ret; | |
3366 | ||
3367 | ret = batadv_tt_local_init(bat_priv); | |
3368 | if (ret < 0) | |
3369 | return ret; | |
3370 | ||
3371 | ret = batadv_tt_global_init(bat_priv); | |
3372 | if (ret < 0) | |
3373 | return ret; | |
3374 | ||
3375 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3376 | batadv_tt_tvlv_unicast_handler_v1, |
3377 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3378 | |
122edaa0 ML |
3379 | batadv_tvlv_handler_register(bat_priv, NULL, |
3380 | batadv_roam_tvlv_unicast_handler_v1, | |
3381 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3382 | ||
e1bf0c14 ML |
3383 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3384 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3385 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3386 | ||
3387 | return 1; | |
3388 | } |