Commit | Line | Data |
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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 | 1282 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
4627456a | 1283 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1284 | * @tt_global_entry: global translation table entry to be analyzed |
1285 | * | |
1286 | * This functon assumes the caller holds rcu_read_lock(). | |
1287 | * Returns best originator list entry or NULL on errors. | |
1288 | */ | |
1289 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1290 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1291 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1292 | { |
4627456a AQ |
1293 | struct batadv_neigh_node *router, *best_router = NULL; |
1294 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1295 | struct hlist_head *head; |
981d8900 | 1296 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1297 | |
1298 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1299 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1300 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
1301 | if (!router) | |
1302 | continue; | |
1303 | ||
4627456a AQ |
1304 | if (best_router && |
1305 | bao->bat_neigh_cmp(router, best_router) <= 0) { | |
1306 | batadv_neigh_node_free_ref(router); | |
1307 | continue; | |
981d8900 SE |
1308 | } |
1309 | ||
4627456a AQ |
1310 | /* release the refcount for the "old" best */ |
1311 | if (best_router) | |
1312 | batadv_neigh_node_free_ref(best_router); | |
1313 | ||
1314 | best_entry = orig_entry; | |
1315 | best_router = router; | |
981d8900 SE |
1316 | } |
1317 | ||
4627456a AQ |
1318 | if (best_router) |
1319 | batadv_neigh_node_free_ref(best_router); | |
1320 | ||
981d8900 SE |
1321 | return best_entry; |
1322 | } | |
1323 | ||
1324 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1325 | * for this global entry | |
4627456a | 1326 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1327 | * @tt_global_entry: global translation table entry to be printed |
1328 | * @seq: debugfs table seq_file struct | |
1329 | * | |
1330 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1331 | */ |
a513088d | 1332 | static void |
4627456a AQ |
1333 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1334 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1335 | struct seq_file *seq) |
db08e6e5 | 1336 | { |
981d8900 | 1337 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1338 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1339 | struct batadv_orig_node_vlan *vlan; |
1340 | struct hlist_head *head; | |
db08e6e5 | 1341 | uint8_t last_ttvn; |
7ea7b4a1 | 1342 | uint16_t flags; |
db08e6e5 SW |
1343 | |
1344 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1345 | flags = tt_common_entry->flags; |
1346 | ||
4627456a | 1347 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1348 | if (best_entry) { |
7ea7b4a1 AQ |
1349 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1350 | tt_common_entry->vid); | |
1351 | if (!vlan) { | |
1352 | seq_printf(seq, | |
1353 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1354 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1355 | best_entry->orig_node->orig); | |
1356 | goto print_list; | |
1357 | } | |
1358 | ||
981d8900 | 1359 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1360 | seq_printf(seq, |
16052789 | 1361 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1362 | '*', tt_global_entry->common.addr, |
16052789 | 1363 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1364 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1365 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1366 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1367 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1368 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1369 | |
1370 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1371 | } |
db08e6e5 | 1372 | |
7ea7b4a1 | 1373 | print_list: |
db08e6e5 SW |
1374 | head = &tt_global_entry->orig_list; |
1375 | ||
b67bfe0d | 1376 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1377 | if (best_entry == orig_entry) |
1378 | continue; | |
1379 | ||
7ea7b4a1 AQ |
1380 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1381 | tt_common_entry->vid); | |
1382 | if (!vlan) { | |
1383 | seq_printf(seq, | |
1384 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1385 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1386 | orig_entry->orig_node->orig); | |
1387 | continue; | |
1388 | } | |
1389 | ||
db08e6e5 | 1390 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1391 | seq_printf(seq, |
7ea7b4a1 | 1392 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1393 | '+', tt_global_entry->common.addr, |
16052789 | 1394 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1395 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1396 | last_ttvn, vlan->tt.crc, |
acd34afa | 1397 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1398 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1399 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1400 | |
1401 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1402 | } |
1403 | } | |
1404 | ||
08c36d3e | 1405 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1406 | { |
1407 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1408 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1409 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1410 | struct batadv_tt_common_entry *tt_common_entry; |
1411 | struct batadv_tt_global_entry *tt_global; | |
1412 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1413 | struct hlist_head *head; |
c90681b8 | 1414 | uint32_t i; |
c6c8fea2 | 1415 | |
30da63a6 ML |
1416 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1417 | if (!primary_if) | |
32ae9b22 | 1418 | goto out; |
c6c8fea2 | 1419 | |
2dafb49d AQ |
1420 | seq_printf(seq, |
1421 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1422 | net_dev->name); |
16052789 AQ |
1423 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1424 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1425 | "CRC", "Flags"); | |
c6c8fea2 | 1426 | |
c6c8fea2 SE |
1427 | for (i = 0; i < hash->size; i++) { |
1428 | head = &hash->table[i]; | |
1429 | ||
7aadf889 | 1430 | rcu_read_lock(); |
b67bfe0d | 1431 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1432 | head, hash_entry) { |
56303d34 SE |
1433 | tt_global = container_of(tt_common_entry, |
1434 | struct batadv_tt_global_entry, | |
1435 | common); | |
4627456a | 1436 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1437 | } |
7aadf889 | 1438 | rcu_read_unlock(); |
c6c8fea2 | 1439 | } |
32ae9b22 ML |
1440 | out: |
1441 | if (primary_if) | |
e5d89254 | 1442 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1443 | return 0; |
c6c8fea2 SE |
1444 | } |
1445 | ||
db08e6e5 | 1446 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1447 | static void |
56303d34 | 1448 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1449 | { |
db08e6e5 | 1450 | struct hlist_head *head; |
b67bfe0d | 1451 | struct hlist_node *safe; |
56303d34 | 1452 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1453 | |
db08e6e5 SW |
1454 | spin_lock_bh(&tt_global_entry->list_lock); |
1455 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1456 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1457 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1458 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1459 | tt_global_entry->common.vid); | |
a513088d | 1460 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1461 | } |
1462 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1463 | } |
1464 | ||
a513088d | 1465 | static void |
56303d34 SE |
1466 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1467 | struct batadv_tt_global_entry *tt_global_entry, | |
1468 | struct batadv_orig_node *orig_node, | |
a513088d | 1469 | const char *message) |
db08e6e5 SW |
1470 | { |
1471 | struct hlist_head *head; | |
b67bfe0d | 1472 | struct hlist_node *safe; |
56303d34 | 1473 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1474 | unsigned short vid; |
db08e6e5 SW |
1475 | |
1476 | spin_lock_bh(&tt_global_entry->list_lock); | |
1477 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1478 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1479 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1480 | vid = tt_global_entry->common.vid; |
39c75a51 | 1481 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1482 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1483 | orig_node->orig, |
16052789 AQ |
1484 | tt_global_entry->common.addr, |
1485 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1486 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1487 | batadv_tt_global_size_dec(orig_node, |
1488 | tt_global_entry->common.vid); | |
a513088d | 1489 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1490 | } |
1491 | } | |
1492 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1493 | } | |
1494 | ||
db08e6e5 | 1495 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1496 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1497 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1498 | */ |
a513088d | 1499 | static void |
56303d34 SE |
1500 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1501 | struct batadv_tt_global_entry *tt_global_entry, | |
1502 | struct batadv_orig_node *orig_node, | |
1503 | const char *message) | |
db08e6e5 SW |
1504 | { |
1505 | bool last_entry = true; | |
1506 | struct hlist_head *head; | |
56303d34 | 1507 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1508 | |
1509 | /* no local entry exists, case 1: | |
1510 | * Check if this is the last one or if other entries exist. | |
1511 | */ | |
1512 | ||
1513 | rcu_read_lock(); | |
1514 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1515 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1516 | if (orig_entry->orig_node != orig_node) { |
1517 | last_entry = false; | |
1518 | break; | |
1519 | } | |
1520 | } | |
1521 | rcu_read_unlock(); | |
1522 | ||
1523 | if (last_entry) { | |
1524 | /* its the last one, mark for roaming. */ | |
acd34afa | 1525 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1526 | tt_global_entry->roam_at = jiffies; |
1527 | } else | |
1528 | /* there is another entry, we can simply delete this | |
1529 | * one and can still use the other one. | |
1530 | */ | |
a513088d SE |
1531 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1532 | orig_node, message); | |
db08e6e5 SW |
1533 | } |
1534 | ||
c018ad3d AQ |
1535 | /** |
1536 | * batadv_tt_global_del - remove a client from the global table | |
1537 | * @bat_priv: the bat priv with all the soft interface information | |
1538 | * @orig_node: an originator serving this client | |
1539 | * @addr: the mac address of the client | |
1540 | * @vid: VLAN identifier | |
1541 | * @message: a message explaining the reason for deleting the client to print | |
1542 | * for debugging purpose | |
1543 | * @roaming: true if the deletion has been triggered by a roaming event | |
1544 | */ | |
56303d34 SE |
1545 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1546 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1547 | const unsigned char *addr, unsigned short vid, |
a513088d | 1548 | const char *message, bool roaming) |
a73105b8 | 1549 | { |
170173bf | 1550 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1551 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1552 | |
c018ad3d | 1553 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1554 | if (!tt_global_entry) |
7683fdc1 | 1555 | goto out; |
a73105b8 | 1556 | |
db08e6e5 | 1557 | if (!roaming) { |
a513088d SE |
1558 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1559 | orig_node, message); | |
db08e6e5 SW |
1560 | |
1561 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1562 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1563 | message); | |
db08e6e5 SW |
1564 | |
1565 | goto out; | |
1566 | } | |
92f90f56 SE |
1567 | |
1568 | /* if we are deleting a global entry due to a roam | |
1569 | * event, there are two possibilities: | |
db08e6e5 SW |
1570 | * 1) the client roamed from node A to node B => if there |
1571 | * is only one originator left for this client, we mark | |
acd34afa | 1572 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1573 | * wait for node B to claim it. In case of timeout |
1574 | * the entry is purged. | |
db08e6e5 SW |
1575 | * |
1576 | * If there are other originators left, we directly delete | |
1577 | * the originator. | |
92f90f56 | 1578 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1579 | * the global entry, since it is useless now. |
1580 | */ | |
a513088d | 1581 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1582 | tt_global_entry->common.addr, |
1583 | vid); | |
a513088d | 1584 | if (local_entry) { |
db08e6e5 | 1585 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1586 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1587 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1588 | } else |
1589 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1590 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1591 | orig_node, message); | |
92f90f56 | 1592 | |
92f90f56 | 1593 | |
cc47f66e | 1594 | out: |
7683fdc1 | 1595 | if (tt_global_entry) |
a513088d SE |
1596 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1597 | if (local_entry) | |
1598 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1599 | } |
1600 | ||
95fb130d AQ |
1601 | /** |
1602 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1603 | * given originator matching the provided vid | |
1604 | * @bat_priv: the bat priv with all the soft interface information | |
1605 | * @orig_node: the originator owning the entries to remove | |
1606 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1607 | * removed | |
1608 | * @message: debug message to print as "reason" | |
1609 | */ | |
56303d34 SE |
1610 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1611 | struct batadv_orig_node *orig_node, | |
95fb130d | 1612 | int32_t match_vid, |
56303d34 | 1613 | const char *message) |
c6c8fea2 | 1614 | { |
56303d34 SE |
1615 | struct batadv_tt_global_entry *tt_global; |
1616 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1617 | uint32_t i; |
807736f6 | 1618 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1619 | struct hlist_node *safe; |
a73105b8 | 1620 | struct hlist_head *head; |
7683fdc1 | 1621 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1622 | unsigned short vid; |
c6c8fea2 | 1623 | |
6e801494 SW |
1624 | if (!hash) |
1625 | return; | |
1626 | ||
a73105b8 AQ |
1627 | for (i = 0; i < hash->size; i++) { |
1628 | head = &hash->table[i]; | |
7683fdc1 | 1629 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1630 | |
7683fdc1 | 1631 | spin_lock_bh(list_lock); |
b67bfe0d | 1632 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1633 | head, hash_entry) { |
95fb130d AQ |
1634 | /* remove only matching entries */ |
1635 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1636 | continue; | |
1637 | ||
56303d34 SE |
1638 | tt_global = container_of(tt_common_entry, |
1639 | struct batadv_tt_global_entry, | |
1640 | common); | |
db08e6e5 | 1641 | |
56303d34 | 1642 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1643 | orig_node, message); |
db08e6e5 | 1644 | |
56303d34 | 1645 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1646 | vid = tt_global->common.vid; |
39c75a51 | 1647 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1648 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1649 | tt_global->common.addr, | |
1650 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1651 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1652 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1653 | } |
a73105b8 | 1654 | } |
7683fdc1 | 1655 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1656 | } |
17071578 | 1657 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1658 | } |
1659 | ||
30cfd02b AQ |
1660 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1661 | char **msg) | |
cc47f66e | 1662 | { |
30cfd02b AQ |
1663 | bool purge = false; |
1664 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1665 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1666 | |
30cfd02b AQ |
1667 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1668 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1669 | purge = true; | |
1670 | *msg = "Roaming timeout\n"; | |
1671 | } | |
42d0b044 | 1672 | |
30cfd02b AQ |
1673 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1674 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1675 | purge = true; | |
1676 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1677 | } |
30cfd02b AQ |
1678 | |
1679 | return purge; | |
42d0b044 SE |
1680 | } |
1681 | ||
30cfd02b | 1682 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1683 | { |
807736f6 | 1684 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1685 | struct hlist_head *head; |
b67bfe0d | 1686 | struct hlist_node *node_tmp; |
7683fdc1 | 1687 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1688 | uint32_t i; |
30cfd02b AQ |
1689 | char *msg = NULL; |
1690 | struct batadv_tt_common_entry *tt_common; | |
1691 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1692 | |
cc47f66e AQ |
1693 | for (i = 0; i < hash->size; i++) { |
1694 | head = &hash->table[i]; | |
7683fdc1 | 1695 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1696 | |
7683fdc1 | 1697 | spin_lock_bh(list_lock); |
b67bfe0d | 1698 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1699 | hash_entry) { |
1700 | tt_global = container_of(tt_common, | |
1701 | struct batadv_tt_global_entry, | |
1702 | common); | |
1703 | ||
1704 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1705 | continue; | |
1706 | ||
1707 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1708 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1709 | tt_global->common.addr, | |
1710 | BATADV_PRINT_VID(tt_global->common.vid), | |
1711 | msg); | |
30cfd02b | 1712 | |
b67bfe0d | 1713 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1714 | |
1715 | batadv_tt_global_entry_free_ref(tt_global); | |
1716 | } | |
7683fdc1 | 1717 | spin_unlock_bh(list_lock); |
cc47f66e | 1718 | } |
cc47f66e AQ |
1719 | } |
1720 | ||
56303d34 | 1721 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1722 | { |
5bf74e9c | 1723 | struct batadv_hashtable *hash; |
7683fdc1 | 1724 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1725 | struct batadv_tt_common_entry *tt_common_entry; |
1726 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1727 | struct hlist_node *node_tmp; |
7683fdc1 | 1728 | struct hlist_head *head; |
c90681b8 | 1729 | uint32_t i; |
7683fdc1 | 1730 | |
807736f6 | 1731 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1732 | return; |
1733 | ||
807736f6 | 1734 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1735 | |
1736 | for (i = 0; i < hash->size; i++) { | |
1737 | head = &hash->table[i]; | |
1738 | list_lock = &hash->list_locks[i]; | |
1739 | ||
1740 | spin_lock_bh(list_lock); | |
b67bfe0d | 1741 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1742 | head, hash_entry) { |
b67bfe0d | 1743 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1744 | tt_global = container_of(tt_common_entry, |
1745 | struct batadv_tt_global_entry, | |
1746 | common); | |
1747 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1748 | } |
1749 | spin_unlock_bh(list_lock); | |
1750 | } | |
1751 | ||
1a8eaf07 | 1752 | batadv_hash_destroy(hash); |
7683fdc1 | 1753 | |
807736f6 | 1754 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1755 | } |
1756 | ||
56303d34 SE |
1757 | static bool |
1758 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1759 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1760 | { |
1761 | bool ret = false; | |
1762 | ||
acd34afa SE |
1763 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1764 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1765 | ret = true; |
1766 | ||
1767 | return ret; | |
1768 | } | |
1769 | ||
c018ad3d AQ |
1770 | /** |
1771 | * batadv_transtable_search - get the mesh destination for a given client | |
1772 | * @bat_priv: the bat priv with all the soft interface information | |
1773 | * @src: mac address of the source client | |
1774 | * @addr: mac address of the destination client | |
1775 | * @vid: VLAN identifier | |
1776 | * | |
1777 | * Returns a pointer to the originator that was selected as destination in the | |
1778 | * mesh for contacting the client 'addr', NULL otherwise. | |
1779 | * In case of multiple originators serving the same client, the function returns | |
1780 | * the best one (best in terms of metric towards the destination node). | |
1781 | * | |
1782 | * If the two clients are AP isolated the function returns NULL. | |
1783 | */ | |
56303d34 SE |
1784 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1785 | const uint8_t *src, | |
c018ad3d AQ |
1786 | const uint8_t *addr, |
1787 | unsigned short vid) | |
c6c8fea2 | 1788 | { |
56303d34 SE |
1789 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1790 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1791 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1792 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d AQ |
1793 | bool ap_isolation_enabled = false; |
1794 | struct batadv_softif_vlan *vlan; | |
c6c8fea2 | 1795 | |
b8cbd81d AQ |
1796 | /* if the AP isolation is requested on a VLAN, then check for its |
1797 | * setting in the proper VLAN private data structure | |
1798 | */ | |
1799 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1800 | if (vlan) { | |
1801 | ap_isolation_enabled = atomic_read(&vlan->ap_isolation); | |
1802 | batadv_softif_vlan_free_ref(vlan); | |
1803 | } | |
1804 | ||
1805 | if (src && ap_isolation_enabled) { | |
c018ad3d | 1806 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1807 | if (!tt_local_entry || |
1808 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1809 | goto out; |
1810 | } | |
7aadf889 | 1811 | |
c018ad3d | 1812 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1813 | if (!tt_global_entry) |
7b36e8ee | 1814 | goto out; |
7aadf889 | 1815 | |
3d393e47 | 1816 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1817 | * isolation |
1818 | */ | |
a513088d SE |
1819 | if (tt_local_entry && |
1820 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1821 | goto out; |
1822 | ||
db08e6e5 | 1823 | rcu_read_lock(); |
4627456a | 1824 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1825 | /* found anything? */ |
981d8900 SE |
1826 | if (best_entry) |
1827 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1828 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1829 | orig_node = NULL; | |
1830 | rcu_read_unlock(); | |
981d8900 | 1831 | |
7b36e8ee | 1832 | out: |
3d393e47 | 1833 | if (tt_global_entry) |
a513088d | 1834 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1835 | if (tt_local_entry) |
a513088d | 1836 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1837 | |
7b36e8ee | 1838 | return orig_node; |
c6c8fea2 | 1839 | } |
a73105b8 | 1840 | |
ced72933 AQ |
1841 | /** |
1842 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1843 | * to the given orig_node | |
1844 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1845 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1846 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1847 | * |
1848 | * This function computes the checksum for the global table corresponding to a | |
1849 | * specific originator. In particular, the checksum is computed as follows: For | |
1850 | * each client connected to the originator the CRC32C of the MAC address and the | |
1851 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1852 | * together. | |
1853 | * | |
1854 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1855 | * produce a unique hash of the table, but since the order which is used to feed | |
1856 | * the CRC32C function affects the result and since every node in the network | |
1857 | * probably sorts the clients differently, the hash function cannot be directly | |
1858 | * computed over the entire table. Hence the CRC32C is used only on | |
1859 | * the single client entry, while all the results are then xor'ed together | |
1860 | * because the XOR operation can combine them all while trying to reduce the | |
1861 | * noise as much as possible. | |
1862 | * | |
1863 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1864 | */ |
1865 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1866 | struct batadv_orig_node *orig_node, |
1867 | unsigned short vid) | |
a73105b8 | 1868 | { |
807736f6 | 1869 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1870 | struct batadv_tt_common_entry *tt_common; |
1871 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1872 | struct hlist_head *head; |
0ffa9e8d | 1873 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1874 | |
1875 | for (i = 0; i < hash->size; i++) { | |
1876 | head = &hash->table[i]; | |
1877 | ||
1878 | rcu_read_lock(); | |
b67bfe0d | 1879 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1880 | tt_global = container_of(tt_common, |
1881 | struct batadv_tt_global_entry, | |
1882 | common); | |
7ea7b4a1 AQ |
1883 | /* compute the CRC only for entries belonging to the |
1884 | * VLAN identified by the vid passed as parameter | |
1885 | */ | |
1886 | if (tt_common->vid != vid) | |
1887 | continue; | |
1888 | ||
db08e6e5 SW |
1889 | /* Roaming clients are in the global table for |
1890 | * consistency only. They don't have to be | |
1891 | * taken into account while computing the | |
1892 | * global crc | |
1893 | */ | |
acd34afa | 1894 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1895 | continue; |
30cfd02b AQ |
1896 | /* Temporary clients have not been announced yet, so |
1897 | * they have to be skipped while computing the global | |
1898 | * crc | |
1899 | */ | |
1900 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1901 | continue; | |
db08e6e5 SW |
1902 | |
1903 | /* find out if this global entry is announced by this | |
1904 | * originator | |
1905 | */ | |
56303d34 | 1906 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1907 | orig_node)) |
db08e6e5 SW |
1908 | continue; |
1909 | ||
0ffa9e8d AQ |
1910 | crc_tmp = crc32c(0, &tt_common->vid, |
1911 | sizeof(tt_common->vid)); | |
1912 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 AQ |
1913 | } |
1914 | rcu_read_unlock(); | |
1915 | } | |
1916 | ||
ced72933 | 1917 | return crc; |
a73105b8 AQ |
1918 | } |
1919 | ||
ced72933 AQ |
1920 | /** |
1921 | * batadv_tt_local_crc - calculates the checksum of the local table | |
1922 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 1923 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1924 | * |
1925 | * For details about the computation, please refer to the documentation for | |
1926 | * batadv_tt_global_crc(). | |
1927 | * | |
1928 | * Returns the checksum of the local table | |
ced72933 | 1929 | */ |
7ea7b4a1 AQ |
1930 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
1931 | unsigned short vid) | |
a73105b8 | 1932 | { |
807736f6 | 1933 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1934 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 1935 | struct hlist_head *head; |
0ffa9e8d | 1936 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1937 | |
1938 | for (i = 0; i < hash->size; i++) { | |
1939 | head = &hash->table[i]; | |
1940 | ||
1941 | rcu_read_lock(); | |
b67bfe0d | 1942 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
1943 | /* compute the CRC only for entries belonging to the |
1944 | * VLAN identified by vid | |
1945 | */ | |
1946 | if (tt_common->vid != vid) | |
1947 | continue; | |
1948 | ||
058d0e26 | 1949 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1950 | * account while computing the CRC |
1951 | */ | |
acd34afa | 1952 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1953 | continue; |
ced72933 | 1954 | |
0ffa9e8d AQ |
1955 | crc_tmp = crc32c(0, &tt_common->vid, |
1956 | sizeof(tt_common->vid)); | |
1957 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 | 1958 | } |
a73105b8 AQ |
1959 | rcu_read_unlock(); |
1960 | } | |
1961 | ||
ced72933 | 1962 | return crc; |
a73105b8 AQ |
1963 | } |
1964 | ||
56303d34 | 1965 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1966 | { |
56303d34 | 1967 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1968 | |
807736f6 | 1969 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1970 | |
807736f6 | 1971 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1972 | list_del(&node->list); |
1973 | kfree(node); | |
1974 | } | |
1975 | ||
807736f6 | 1976 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1977 | } |
1978 | ||
56303d34 SE |
1979 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1980 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
1981 | const void *tt_buff, |
1982 | uint16_t tt_buff_len) | |
a73105b8 | 1983 | { |
a73105b8 | 1984 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
1985 | * last OGM (the OGM could carry no changes) |
1986 | */ | |
a73105b8 AQ |
1987 | spin_lock_bh(&orig_node->tt_buff_lock); |
1988 | if (tt_buff_len > 0) { | |
1989 | kfree(orig_node->tt_buff); | |
1990 | orig_node->tt_buff_len = 0; | |
1991 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1992 | if (orig_node->tt_buff) { | |
1993 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1994 | orig_node->tt_buff_len = tt_buff_len; | |
1995 | } | |
1996 | } | |
1997 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1998 | } | |
1999 | ||
56303d34 | 2000 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2001 | { |
56303d34 | 2002 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2003 | |
807736f6 SE |
2004 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2005 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2006 | if (batadv_has_timed_out(node->issued_at, |
2007 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2008 | list_del(&node->list); |
2009 | kfree(node); | |
2010 | } | |
2011 | } | |
807736f6 | 2012 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2013 | } |
2014 | ||
2015 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2016 | * has already been issued for this orig_node, NULL otherwise |
2017 | */ | |
56303d34 SE |
2018 | static struct batadv_tt_req_node * |
2019 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2020 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2021 | { |
56303d34 | 2022 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2023 | |
807736f6 SE |
2024 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2025 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2026 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2027 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2028 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2029 | goto unlock; |
2030 | } | |
2031 | ||
2032 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2033 | if (!tt_req_node) | |
2034 | goto unlock; | |
2035 | ||
2036 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
2037 | tt_req_node->issued_at = jiffies; | |
2038 | ||
807736f6 | 2039 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2040 | unlock: |
807736f6 | 2041 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2042 | return tt_req_node; |
2043 | } | |
2044 | ||
335fbe0f ML |
2045 | /** |
2046 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2047 | * @entry_ptr: to be checked local tt entry | |
2048 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2049 | * | |
2050 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2051 | */ | |
2052 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2053 | { |
56303d34 | 2054 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2055 | |
acd34afa | 2056 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2057 | return 0; |
2058 | return 1; | |
2059 | } | |
2060 | ||
a513088d SE |
2061 | static int batadv_tt_global_valid(const void *entry_ptr, |
2062 | const void *data_ptr) | |
a73105b8 | 2063 | { |
56303d34 SE |
2064 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2065 | const struct batadv_tt_global_entry *tt_global_entry; | |
2066 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2067 | |
30cfd02b AQ |
2068 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2069 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2070 | return 0; |
2071 | ||
56303d34 SE |
2072 | tt_global_entry = container_of(tt_common_entry, |
2073 | struct batadv_tt_global_entry, | |
48100bac AQ |
2074 | common); |
2075 | ||
a513088d | 2076 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2077 | } |
2078 | ||
335fbe0f | 2079 | /** |
7ea7b4a1 AQ |
2080 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2081 | * specified tt hash | |
335fbe0f ML |
2082 | * @bat_priv: the bat priv with all the soft interface information |
2083 | * @hash: hash table containing the tt entries | |
2084 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2085 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2086 | * @valid_cb: function to filter tt change entries |
2087 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2088 | */ |
7ea7b4a1 AQ |
2089 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2090 | struct batadv_hashtable *hash, | |
2091 | void *tvlv_buff, uint16_t tt_len, | |
2092 | int (*valid_cb)(const void *, const void *), | |
2093 | void *cb_data) | |
a73105b8 | 2094 | { |
56303d34 | 2095 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2096 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2097 | struct hlist_head *head; |
335fbe0f | 2098 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2099 | uint32_t i; |
a73105b8 | 2100 | |
298e6e68 | 2101 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2102 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2103 | |
2104 | rcu_read_lock(); | |
2105 | for (i = 0; i < hash->size; i++) { | |
2106 | head = &hash->table[i]; | |
2107 | ||
b67bfe0d | 2108 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2109 | head, hash_entry) { |
335fbe0f | 2110 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2111 | break; |
2112 | ||
48100bac | 2113 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2114 | continue; |
2115 | ||
48100bac AQ |
2116 | memcpy(tt_change->addr, tt_common_entry->addr, |
2117 | ETH_ALEN); | |
27b37ebf | 2118 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2119 | tt_change->vid = htons(tt_common_entry->vid); |
335fbe0f | 2120 | tt_change->reserved = 0; |
a73105b8 | 2121 | |
335fbe0f | 2122 | tt_num_entries++; |
a73105b8 AQ |
2123 | tt_change++; |
2124 | } | |
2125 | } | |
2126 | rcu_read_unlock(); | |
7ea7b4a1 | 2127 | } |
a73105b8 | 2128 | |
7ea7b4a1 AQ |
2129 | /** |
2130 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2131 | * @orig_node: originator for which the CRCs have to be checked | |
2132 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2133 | * @num_vlan: number of tvlv VLAN entries | |
2134 | * @create: if true, create VLAN objects if not found | |
2135 | * | |
2136 | * Return true if all the received CRCs match the locally stored ones, false | |
2137 | * otherwise | |
2138 | */ | |
2139 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2140 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2141 | uint16_t num_vlan) | |
2142 | { | |
2143 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2144 | struct batadv_orig_node_vlan *vlan; | |
2145 | int i; | |
2146 | ||
2147 | /* check if each received CRC matches the locally stored one */ | |
2148 | for (i = 0; i < num_vlan; i++) { | |
2149 | tt_vlan_tmp = tt_vlan + i; | |
2150 | ||
2151 | /* if orig_node is a backbone node for this VLAN, don't check | |
2152 | * the CRC as we ignore all the global entries over it | |
2153 | */ | |
2154 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2155 | orig_node->orig, |
2156 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2157 | continue; |
2158 | ||
2159 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2160 | ntohs(tt_vlan_tmp->vid)); | |
2161 | if (!vlan) | |
2162 | return false; | |
2163 | ||
2164 | if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) | |
2165 | return false; | |
2166 | } | |
2167 | ||
2168 | return true; | |
2169 | } | |
2170 | ||
2171 | /** | |
2172 | * batadv_tt_local_update_crc - update all the local CRCs | |
2173 | * @bat_priv: the bat priv with all the soft interface information | |
2174 | */ | |
2175 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2176 | { | |
2177 | struct batadv_softif_vlan *vlan; | |
2178 | ||
2179 | /* recompute the global CRC for each VLAN */ | |
2180 | rcu_read_lock(); | |
2181 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2182 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2183 | } | |
2184 | rcu_read_unlock(); | |
2185 | } | |
2186 | ||
2187 | /** | |
2188 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2189 | * @bat_priv: the bat priv with all the soft interface information | |
2190 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2191 | */ | |
2192 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2193 | struct batadv_orig_node *orig_node) | |
2194 | { | |
2195 | struct batadv_orig_node_vlan *vlan; | |
2196 | uint32_t crc; | |
2197 | ||
2198 | /* recompute the global CRC for each VLAN */ | |
2199 | rcu_read_lock(); | |
2200 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2201 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2202 | * the CRC as we ignore all the global entries over it | |
2203 | */ | |
cfd4f757 AQ |
2204 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2205 | vlan->vid)) | |
7ea7b4a1 AQ |
2206 | continue; |
2207 | ||
2208 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2209 | vlan->tt.crc = crc; | |
2210 | } | |
2211 | rcu_read_unlock(); | |
a73105b8 AQ |
2212 | } |
2213 | ||
ced72933 AQ |
2214 | /** |
2215 | * batadv_send_tt_request - send a TT Request message to a given node | |
2216 | * @bat_priv: the bat priv with all the soft interface information | |
2217 | * @dst_orig_node: the destination of the message | |
2218 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2219 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2220 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2221 | * @full_table: ask for the entire translation table if true, while only for the |
2222 | * last TT diff otherwise | |
2223 | */ | |
56303d34 SE |
2224 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2225 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2226 | uint8_t ttvn, |
2227 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2228 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2229 | { |
335fbe0f | 2230 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2231 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2232 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2233 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2234 | bool ret = false; |
7ea7b4a1 | 2235 | int i, size; |
a73105b8 | 2236 | |
e5d89254 | 2237 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2238 | if (!primary_if) |
2239 | goto out; | |
2240 | ||
2241 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2242 | * reply from the same orig_node yet |
2243 | */ | |
a513088d | 2244 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2245 | if (!tt_req_node) |
2246 | goto out; | |
2247 | ||
7ea7b4a1 AQ |
2248 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2249 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2250 | if (!tvlv_tt_data) |
a73105b8 AQ |
2251 | goto out; |
2252 | ||
335fbe0f ML |
2253 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2254 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2255 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2256 | ||
2257 | /* send all the CRCs within the request. This is needed by intermediate | |
2258 | * nodes to ensure they have the correct table before replying | |
2259 | */ | |
2260 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2261 | for (i = 0; i < num_vlan; i++) { | |
2262 | tt_vlan_req->vid = tt_vlan->vid; | |
2263 | tt_vlan_req->crc = tt_vlan->crc; | |
2264 | ||
2265 | tt_vlan_req++; | |
2266 | tt_vlan++; | |
2267 | } | |
a73105b8 AQ |
2268 | |
2269 | if (full_table) | |
335fbe0f | 2270 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2271 | |
bb351ba0 | 2272 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2273 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2274 | |
d69909d2 | 2275 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2276 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2277 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2278 | tvlv_tt_data, size); |
335fbe0f | 2279 | ret = true; |
a73105b8 AQ |
2280 | |
2281 | out: | |
a73105b8 | 2282 | if (primary_if) |
e5d89254 | 2283 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2284 | if (ret && tt_req_node) { |
807736f6 | 2285 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2286 | list_del(&tt_req_node->list); |
807736f6 | 2287 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2288 | kfree(tt_req_node); |
2289 | } | |
335fbe0f | 2290 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2291 | return ret; |
2292 | } | |
2293 | ||
335fbe0f ML |
2294 | /** |
2295 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2296 | * node's translation table | |
2297 | * @bat_priv: the bat priv with all the soft interface information | |
2298 | * @tt_data: tt data containing the tt request information | |
2299 | * @req_src: mac address of tt request sender | |
2300 | * @req_dst: mac address of tt request recipient | |
2301 | * | |
2302 | * Returns true if tt request reply was sent, false otherwise. | |
2303 | */ | |
2304 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2305 | struct batadv_tvlv_tt_data *tt_data, | |
2306 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2307 | { |
170173bf | 2308 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2309 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2310 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2311 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2312 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2313 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2314 | uint8_t orig_ttvn, req_ttvn; |
2315 | uint16_t tvlv_len; | |
2316 | int32_t tt_len; | |
a73105b8 | 2317 | |
39c75a51 | 2318 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2319 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2320 | req_src, tt_data->ttvn, req_dst, |
2321 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2322 | |
2323 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2324 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2325 | if (!req_dst_orig_node) |
2326 | goto out; | |
2327 | ||
335fbe0f | 2328 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2329 | if (!res_dst_orig_node) |
2330 | goto out; | |
2331 | ||
a73105b8 | 2332 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2333 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2334 | |
7ea7b4a1 | 2335 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2336 | /* this node doesn't have the requested data */ |
a73105b8 | 2337 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2338 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2339 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2340 | goto out; |
2341 | ||
015758d0 | 2342 | /* If the full table has been explicitly requested */ |
335fbe0f | 2343 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2344 | !req_dst_orig_node->tt_buff) |
2345 | full_table = true; | |
2346 | else | |
2347 | full_table = false; | |
2348 | ||
335fbe0f ML |
2349 | /* TT fragmentation hasn't been implemented yet, so send as many |
2350 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2351 | */ |
a73105b8 AQ |
2352 | if (!full_table) { |
2353 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2354 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2355 | |
7ea7b4a1 AQ |
2356 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2357 | &tvlv_tt_data, | |
2358 | &tt_change, | |
2359 | &tt_len); | |
2360 | if (!tt_len) | |
a73105b8 AQ |
2361 | goto unlock; |
2362 | ||
a73105b8 | 2363 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2364 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2365 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2366 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2367 | } else { | |
7ea7b4a1 AQ |
2368 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2369 | * in the initial part | |
2370 | */ | |
2371 | tt_len = -1; | |
2372 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2373 | &tvlv_tt_data, | |
2374 | &tt_change, | |
2375 | &tt_len); | |
2376 | if (!tt_len) | |
a73105b8 | 2377 | goto out; |
7ea7b4a1 AQ |
2378 | |
2379 | /* fill the rest of the tvlv with the real TT entries */ | |
2380 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2381 | tt_change, tt_len, | |
2382 | batadv_tt_global_valid, | |
2383 | req_dst_orig_node); | |
a73105b8 AQ |
2384 | } |
2385 | ||
335fbe0f ML |
2386 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2387 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2388 | |
2389 | if (full_table) | |
335fbe0f | 2390 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2391 | |
39c75a51 | 2392 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2393 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2394 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2395 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2396 | |
d69909d2 | 2397 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2398 | |
335fbe0f | 2399 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2400 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2401 | tvlv_len); | |
e91ecfc6 | 2402 | |
335fbe0f | 2403 | ret = true; |
a73105b8 AQ |
2404 | goto out; |
2405 | ||
2406 | unlock: | |
2407 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2408 | ||
2409 | out: | |
2410 | if (res_dst_orig_node) | |
7d211efc | 2411 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2412 | if (req_dst_orig_node) |
7d211efc | 2413 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2414 | kfree(tvlv_tt_data); |
a73105b8 | 2415 | return ret; |
a73105b8 | 2416 | } |
96412690 | 2417 | |
335fbe0f ML |
2418 | /** |
2419 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2420 | * translation table | |
2421 | * @bat_priv: the bat priv with all the soft interface information | |
2422 | * @tt_data: tt data containing the tt request information | |
2423 | * @req_src: mac address of tt request sender | |
2424 | * | |
2425 | * Returns true if tt request reply was sent, false otherwise. | |
2426 | */ | |
2427 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2428 | struct batadv_tvlv_tt_data *tt_data, | |
2429 | uint8_t *req_src) | |
a73105b8 | 2430 | { |
335fbe0f | 2431 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2432 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2433 | struct batadv_tvlv_tt_change *tt_change; |
2434 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2435 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2436 | uint16_t tvlv_len; |
a73105b8 | 2437 | bool full_table; |
7ea7b4a1 | 2438 | int32_t tt_len; |
a73105b8 | 2439 | |
39c75a51 | 2440 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2441 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2442 | req_src, tt_data->ttvn, |
2443 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2444 | |
a70a9aa9 | 2445 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2446 | |
807736f6 | 2447 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2448 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2449 | |
335fbe0f | 2450 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2451 | if (!orig_node) |
2452 | goto out; | |
2453 | ||
e5d89254 | 2454 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2455 | if (!primary_if) |
2456 | goto out; | |
2457 | ||
2458 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2459 | * is too big send the whole local translation table |
2460 | */ | |
335fbe0f | 2461 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2462 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2463 | full_table = true; |
2464 | else | |
2465 | full_table = false; | |
2466 | ||
335fbe0f ML |
2467 | /* TT fragmentation hasn't been implemented yet, so send as many |
2468 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2469 | */ |
a73105b8 | 2470 | if (!full_table) { |
807736f6 | 2471 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2472 | |
7ea7b4a1 AQ |
2473 | tt_len = bat_priv->tt.last_changeset_len; |
2474 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2475 | &tvlv_tt_data, | |
2476 | &tt_change, | |
2477 | &tt_len); | |
2478 | if (!tt_len) | |
a73105b8 AQ |
2479 | goto unlock; |
2480 | ||
335fbe0f | 2481 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2482 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2483 | bat_priv->tt.last_changeset_len); |
2484 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2485 | } else { |
335fbe0f ML |
2486 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2487 | ||
7ea7b4a1 AQ |
2488 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2489 | * in the initial part | |
2490 | */ | |
2491 | tt_len = -1; | |
2492 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2493 | &tvlv_tt_data, | |
2494 | &tt_change, | |
2495 | &tt_len); | |
2496 | if (!tt_len) | |
a73105b8 | 2497 | goto out; |
7ea7b4a1 AQ |
2498 | |
2499 | /* fill the rest of the tvlv with the real TT entries */ | |
2500 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2501 | tt_change, tt_len, | |
2502 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2503 | } |
2504 | ||
335fbe0f ML |
2505 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2506 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2507 | |
2508 | if (full_table) | |
335fbe0f | 2509 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2510 | |
39c75a51 | 2511 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2512 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2513 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2514 | |
d69909d2 | 2515 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2516 | |
335fbe0f | 2517 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2518 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2519 | tvlv_len); | |
335fbe0f | 2520 | |
a73105b8 AQ |
2521 | goto out; |
2522 | ||
2523 | unlock: | |
807736f6 | 2524 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2525 | out: |
a70a9aa9 | 2526 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2527 | if (orig_node) |
7d211efc | 2528 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2529 | if (primary_if) |
e5d89254 | 2530 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2531 | kfree(tvlv_tt_data); |
2532 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2533 | return true; |
2534 | } | |
2535 | ||
335fbe0f ML |
2536 | /** |
2537 | * batadv_send_tt_response - send reply to tt request | |
2538 | * @bat_priv: the bat priv with all the soft interface information | |
2539 | * @tt_data: tt data containing the tt request information | |
2540 | * @req_src: mac address of tt request sender | |
2541 | * @req_dst: mac address of tt request recipient | |
2542 | * | |
2543 | * Returns true if tt request reply was sent, false otherwise. | |
2544 | */ | |
2545 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2546 | struct batadv_tvlv_tt_data *tt_data, | |
2547 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2548 | { |
cfd4f757 | 2549 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2550 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2551 | else |
335fbe0f ML |
2552 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2553 | req_src, req_dst); | |
a73105b8 AQ |
2554 | } |
2555 | ||
56303d34 SE |
2556 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2557 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2558 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2559 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2560 | { |
2561 | int i; | |
a513088d | 2562 | int roams; |
a73105b8 AQ |
2563 | |
2564 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2565 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2566 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2567 | batadv_tt_global_del(bat_priv, orig_node, |
2568 | (tt_change + i)->addr, | |
c018ad3d | 2569 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2570 | "tt removed by changes", |
2571 | roams); | |
08c36d3e | 2572 | } else { |
08c36d3e | 2573 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2574 | (tt_change + i)->addr, |
c018ad3d | 2575 | ntohs((tt_change + i)->vid), |
d4f44692 | 2576 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2577 | /* In case of problem while storing a |
2578 | * global_entry, we stop the updating | |
2579 | * procedure without committing the | |
2580 | * ttvn change. This will avoid to send | |
2581 | * corrupted data on tt_request | |
2582 | */ | |
2583 | return; | |
08c36d3e | 2584 | } |
a73105b8 | 2585 | } |
17071578 | 2586 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2587 | } |
2588 | ||
56303d34 | 2589 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2590 | struct batadv_tvlv_tt_change *tt_change, |
2591 | uint8_t ttvn, uint8_t *resp_src, | |
2592 | uint16_t num_entries) | |
a73105b8 | 2593 | { |
170173bf | 2594 | struct batadv_orig_node *orig_node; |
a73105b8 | 2595 | |
335fbe0f | 2596 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2597 | if (!orig_node) |
2598 | goto out; | |
2599 | ||
2600 | /* Purge the old table first.. */ | |
95fb130d AQ |
2601 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2602 | "Received full table"); | |
a73105b8 | 2603 | |
7ea7b4a1 AQ |
2604 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2605 | ttvn); | |
a73105b8 AQ |
2606 | |
2607 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2608 | kfree(orig_node->tt_buff); | |
2609 | orig_node->tt_buff_len = 0; | |
2610 | orig_node->tt_buff = NULL; | |
2611 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2612 | ||
7ea7b4a1 | 2613 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2614 | |
2615 | out: | |
2616 | if (orig_node) | |
7d211efc | 2617 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2618 | } |
2619 | ||
56303d34 SE |
2620 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2621 | struct batadv_orig_node *orig_node, | |
a513088d | 2622 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2623 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2624 | { |
a513088d SE |
2625 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2626 | tt_num_changes, ttvn); | |
a73105b8 | 2627 | |
e8cf234a AQ |
2628 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2629 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2630 | atomic_set(&orig_node->last_ttvn, ttvn); |
2631 | } | |
2632 | ||
c018ad3d AQ |
2633 | /** |
2634 | * batadv_is_my_client - check if a client is served by the local node | |
2635 | * @bat_priv: the bat priv with all the soft interface information | |
2636 | * @addr: the mac adress of the client to check | |
2637 | * @vid: VLAN identifier | |
2638 | * | |
2639 | * Returns true if the client is served by this node, false otherwise. | |
2640 | */ | |
2641 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2642 | unsigned short vid) | |
a73105b8 | 2643 | { |
170173bf | 2644 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2645 | bool ret = false; |
a73105b8 | 2646 | |
c018ad3d | 2647 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2648 | if (!tt_local_entry) |
2649 | goto out; | |
058d0e26 | 2650 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2651 | * consistency purpose) |
2652 | */ | |
7c1fd91d AQ |
2653 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2654 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2655 | goto out; |
7683fdc1 AQ |
2656 | ret = true; |
2657 | out: | |
a73105b8 | 2658 | if (tt_local_entry) |
a513088d | 2659 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2660 | return ret; |
a73105b8 AQ |
2661 | } |
2662 | ||
335fbe0f ML |
2663 | /** |
2664 | * batadv_handle_tt_response - process incoming tt reply | |
2665 | * @bat_priv: the bat priv with all the soft interface information | |
2666 | * @tt_data: tt data containing the tt request information | |
2667 | * @resp_src: mac address of tt reply sender | |
2668 | * @num_entries: number of tt change entries appended to the tt data | |
2669 | */ | |
2670 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2671 | struct batadv_tvlv_tt_data *tt_data, | |
2672 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2673 | { |
56303d34 SE |
2674 | struct batadv_tt_req_node *node, *safe; |
2675 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2676 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2677 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2678 | uint16_t change_offset; | |
a73105b8 | 2679 | |
39c75a51 | 2680 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2681 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2682 | resp_src, tt_data->ttvn, num_entries, |
2683 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2684 | |
335fbe0f | 2685 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2686 | if (!orig_node) |
2687 | goto out; | |
2688 | ||
a70a9aa9 AQ |
2689 | spin_lock_bh(&orig_node->tt_lock); |
2690 | ||
7ea7b4a1 AQ |
2691 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2692 | change_offset *= ntohs(tt_data->num_vlan); | |
2693 | change_offset += sizeof(*tt_data); | |
2694 | tvlv_ptr += change_offset; | |
2695 | ||
2696 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2697 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2698 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2699 | resp_src, num_entries); | |
96412690 | 2700 | } else { |
335fbe0f ML |
2701 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2702 | tt_data->ttvn, tt_change); | |
96412690 | 2703 | } |
a73105b8 | 2704 | |
a70a9aa9 | 2705 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2706 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2707 | |
2708 | spin_unlock_bh(&orig_node->tt_lock); | |
2709 | ||
a73105b8 | 2710 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2711 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2712 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2713 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2714 | continue; |
2715 | list_del(&node->list); | |
2716 | kfree(node); | |
2717 | } | |
7ea7b4a1 | 2718 | |
807736f6 | 2719 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2720 | out: |
2721 | if (orig_node) | |
7d211efc | 2722 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2723 | } |
2724 | ||
56303d34 | 2725 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2726 | { |
56303d34 | 2727 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2728 | |
807736f6 | 2729 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2730 | |
807736f6 | 2731 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2732 | list_del(&node->list); |
2733 | kfree(node); | |
2734 | } | |
2735 | ||
807736f6 | 2736 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2737 | } |
2738 | ||
56303d34 | 2739 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2740 | { |
56303d34 | 2741 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2742 | |
807736f6 SE |
2743 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2744 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2745 | if (!batadv_has_timed_out(node->first_time, |
2746 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2747 | continue; |
2748 | ||
2749 | list_del(&node->list); | |
2750 | kfree(node); | |
2751 | } | |
807736f6 | 2752 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2753 | } |
2754 | ||
2755 | /* This function checks whether the client already reached the | |
2756 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2757 | * will not be sent. | |
2758 | * | |
9cfc7bd6 SE |
2759 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2760 | */ | |
56303d34 | 2761 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2762 | uint8_t *client) |
cc47f66e | 2763 | { |
56303d34 | 2764 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2765 | bool ret = false; |
2766 | ||
807736f6 | 2767 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2768 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2769 | * reply from the same orig_node yet |
2770 | */ | |
807736f6 | 2771 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2772 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2773 | continue; |
2774 | ||
1eda58bf | 2775 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2776 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2777 | continue; |
2778 | ||
3e34819e | 2779 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2780 | /* Sorry, you roamed too many times! */ |
2781 | goto unlock; | |
2782 | ret = true; | |
2783 | break; | |
2784 | } | |
2785 | ||
2786 | if (!ret) { | |
2787 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2788 | if (!tt_roam_node) | |
2789 | goto unlock; | |
2790 | ||
2791 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2792 | atomic_set(&tt_roam_node->counter, |
2793 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2794 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2795 | ||
807736f6 | 2796 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2797 | ret = true; |
2798 | } | |
2799 | ||
2800 | unlock: | |
807736f6 | 2801 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2802 | return ret; |
2803 | } | |
2804 | ||
c018ad3d AQ |
2805 | /** |
2806 | * batadv_send_roam_adv - send a roaming advertisement message | |
2807 | * @bat_priv: the bat priv with all the soft interface information | |
2808 | * @client: mac address of the roaming client | |
2809 | * @vid: VLAN identifier | |
2810 | * @orig_node: message destination | |
2811 | * | |
2812 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2813 | * client. This is done to inform the node that from now on all traffic destined | |
2814 | * for this particular roamed client has to be forwarded to the sender of the | |
2815 | * roaming message. | |
2816 | */ | |
56303d34 | 2817 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2818 | unsigned short vid, |
56303d34 | 2819 | struct batadv_orig_node *orig_node) |
cc47f66e | 2820 | { |
56303d34 | 2821 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2822 | struct batadv_tvlv_roam_adv tvlv_roam; |
2823 | ||
2824 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2825 | if (!primary_if) | |
2826 | goto out; | |
cc47f66e AQ |
2827 | |
2828 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2829 | * already roamed to us too many times |
2830 | */ | |
a513088d | 2831 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2832 | goto out; |
2833 | ||
39c75a51 | 2834 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2835 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2836 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2837 | |
d69909d2 | 2838 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2839 | |
122edaa0 | 2840 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2841 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2842 | |
2843 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2844 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2845 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2846 | |
2847 | out: | |
122edaa0 ML |
2848 | if (primary_if) |
2849 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2850 | } |
2851 | ||
a513088d | 2852 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2853 | { |
56303d34 | 2854 | struct delayed_work *delayed_work; |
807736f6 | 2855 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2856 | struct batadv_priv *bat_priv; |
2857 | ||
2858 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2859 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2860 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2861 | |
a513088d | 2862 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2863 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2864 | batadv_tt_req_purge(bat_priv); |
2865 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2866 | |
72414442 AQ |
2867 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2868 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2869 | } |
cc47f66e | 2870 | |
56303d34 | 2871 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2872 | { |
e1bf0c14 ML |
2873 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2874 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
2875 | ||
807736f6 | 2876 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2877 | |
a513088d SE |
2878 | batadv_tt_local_table_free(bat_priv); |
2879 | batadv_tt_global_table_free(bat_priv); | |
2880 | batadv_tt_req_list_free(bat_priv); | |
2881 | batadv_tt_changes_list_free(bat_priv); | |
2882 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2883 | |
807736f6 | 2884 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2885 | } |
058d0e26 | 2886 | |
7ea7b4a1 AQ |
2887 | /** |
2888 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
2889 | * table and possibly count them in the TT size | |
2890 | * @bat_priv: the bat priv with all the soft interface information | |
2891 | * @flags: the flag to switch | |
2892 | * @enable: whether to set or unset the flag | |
2893 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 2894 | */ |
7ea7b4a1 AQ |
2895 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
2896 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 2897 | { |
7ea7b4a1 AQ |
2898 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
2899 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 2900 | uint16_t changed_num = 0; |
058d0e26 | 2901 | struct hlist_head *head; |
7ea7b4a1 | 2902 | uint32_t i; |
058d0e26 AQ |
2903 | |
2904 | if (!hash) | |
7ea7b4a1 | 2905 | return; |
058d0e26 AQ |
2906 | |
2907 | for (i = 0; i < hash->size; i++) { | |
2908 | head = &hash->table[i]; | |
2909 | ||
2910 | rcu_read_lock(); | |
b67bfe0d | 2911 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2912 | head, hash_entry) { |
697f2531 AQ |
2913 | if (enable) { |
2914 | if ((tt_common_entry->flags & flags) == flags) | |
2915 | continue; | |
2916 | tt_common_entry->flags |= flags; | |
2917 | } else { | |
2918 | if (!(tt_common_entry->flags & flags)) | |
2919 | continue; | |
2920 | tt_common_entry->flags &= ~flags; | |
2921 | } | |
2922 | changed_num++; | |
7ea7b4a1 AQ |
2923 | |
2924 | if (!count) | |
2925 | continue; | |
2926 | ||
2927 | batadv_tt_local_size_inc(bat_priv, | |
2928 | tt_common_entry->vid); | |
058d0e26 AQ |
2929 | } |
2930 | rcu_read_unlock(); | |
2931 | } | |
058d0e26 AQ |
2932 | } |
2933 | ||
acd34afa | 2934 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2935 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2936 | { |
807736f6 | 2937 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2938 | struct batadv_tt_common_entry *tt_common; |
2939 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 2940 | struct hlist_node *node_tmp; |
058d0e26 AQ |
2941 | struct hlist_head *head; |
2942 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2943 | uint32_t i; |
058d0e26 AQ |
2944 | |
2945 | if (!hash) | |
2946 | return; | |
2947 | ||
2948 | for (i = 0; i < hash->size; i++) { | |
2949 | head = &hash->table[i]; | |
2950 | list_lock = &hash->list_locks[i]; | |
2951 | ||
2952 | spin_lock_bh(list_lock); | |
b67bfe0d | 2953 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
2954 | hash_entry) { |
2955 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2956 | continue; |
2957 | ||
39c75a51 | 2958 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2959 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
2960 | tt_common->addr, | |
2961 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 2962 | |
7ea7b4a1 | 2963 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 2964 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
2965 | tt_local = container_of(tt_common, |
2966 | struct batadv_tt_local_entry, | |
2967 | common); | |
2968 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2969 | } |
2970 | spin_unlock_bh(list_lock); | |
2971 | } | |
058d0e26 AQ |
2972 | } |
2973 | ||
e1bf0c14 ML |
2974 | /** |
2975 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
2976 | * have been queued in the time since the last commit | |
2977 | * @bat_priv: the bat priv with all the soft interface information | |
2978 | */ | |
2979 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
058d0e26 | 2980 | { |
a70a9aa9 AQ |
2981 | spin_lock_bh(&bat_priv->tt.commit_lock); |
2982 | ||
e1bf0c14 ML |
2983 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
2984 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
2985 | batadv_tt_tvlv_container_update(bat_priv); | |
a70a9aa9 | 2986 | goto out; |
e1bf0c14 | 2987 | } |
be9aa4c1 | 2988 | |
7ea7b4a1 | 2989 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 2990 | |
a513088d | 2991 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 2992 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
2993 | |
2994 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2995 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2996 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2997 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2998 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2999 | |
3000 | /* reset the sending counter */ | |
807736f6 | 3001 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3002 | batadv_tt_tvlv_container_update(bat_priv); |
a70a9aa9 AQ |
3003 | |
3004 | out: | |
3005 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
058d0e26 | 3006 | } |
59b699cd | 3007 | |
56303d34 | 3008 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3009 | uint8_t *dst, unsigned short vid) |
59b699cd | 3010 | { |
56303d34 SE |
3011 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3012 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3013 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3014 | bool ret = false; |
59b699cd | 3015 | |
b8cbd81d AQ |
3016 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3017 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3018 | goto out; |
59b699cd | 3019 | |
b8cbd81d | 3020 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3021 | if (!tt_local_entry) |
3022 | goto out; | |
3023 | ||
b8cbd81d | 3024 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3025 | if (!tt_global_entry) |
3026 | goto out; | |
3027 | ||
1f129fef | 3028 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3029 | goto out; |
3030 | ||
5870adc6 | 3031 | ret = true; |
59b699cd AQ |
3032 | |
3033 | out: | |
b8cbd81d AQ |
3034 | if (vlan) |
3035 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3036 | if (tt_global_entry) |
a513088d | 3037 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3038 | if (tt_local_entry) |
a513088d | 3039 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3040 | return ret; |
3041 | } | |
a943cac1 | 3042 | |
e1bf0c14 ML |
3043 | /** |
3044 | * batadv_tt_update_orig - update global translation table with new tt | |
3045 | * information received via ogms | |
3046 | * @bat_priv: the bat priv with all the soft interface information | |
3047 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3048 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3049 | * @tt_num_vlan: number of tvlv VLAN entries | |
3050 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3051 | * @tt_num_changes: number of tt changes inside the tt buffer |
3052 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3053 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3054 | */ |
3055 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3056 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3057 | const void *tt_buff, uint16_t tt_num_vlan, |
3058 | struct batadv_tvlv_tt_change *tt_change, | |
3059 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3060 | { |
3061 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3062 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 ML |
3063 | bool full_table = true; |
3064 | ||
7ea7b4a1 | 3065 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
17071578 | 3066 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3067 | * increased by one -> we can apply the attached changes |
3068 | */ | |
17071578 AQ |
3069 | if ((!orig_node->tt_initialised && ttvn == 1) || |
3070 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 3071 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3072 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3073 | * times. | |
9cfc7bd6 SE |
3074 | * In this case send a tt request |
3075 | */ | |
a943cac1 ML |
3076 | if (!tt_num_changes) { |
3077 | full_table = false; | |
3078 | goto request_table; | |
3079 | } | |
3080 | ||
a70a9aa9 AQ |
3081 | spin_lock_bh(&orig_node->tt_lock); |
3082 | ||
335fbe0f | 3083 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 3084 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3085 | ttvn, tt_change); |
a943cac1 ML |
3086 | |
3087 | /* Even if we received the precomputed crc with the OGM, we | |
3088 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3089 | * in the global table |
3090 | */ | |
7ea7b4a1 | 3091 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3092 | |
a70a9aa9 AQ |
3093 | spin_unlock_bh(&orig_node->tt_lock); |
3094 | ||
a943cac1 ML |
3095 | /* The ttvn alone is not enough to guarantee consistency |
3096 | * because a single value could represent different states | |
3097 | * (due to the wrap around). Thus a node has to check whether | |
3098 | * the resulting table (after applying the changes) is still | |
3099 | * consistent or not. E.g. a node could disconnect while its | |
3100 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3101 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3102 | * inconsistency |
3103 | */ | |
7ea7b4a1 AQ |
3104 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3105 | tt_num_vlan)) | |
a943cac1 | 3106 | goto request_table; |
a943cac1 ML |
3107 | } else { |
3108 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3109 | * in sync anymore -> request fresh tt data |
3110 | */ | |
17071578 | 3111 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3112 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3113 | tt_num_vlan)) { | |
a943cac1 | 3114 | request_table: |
39c75a51 | 3115 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3116 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3117 | orig_node->orig, ttvn, orig_ttvn, | |
3118 | tt_num_changes); | |
a513088d | 3119 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3120 | tt_vlan, tt_num_vlan, |
3121 | full_table); | |
a943cac1 ML |
3122 | return; |
3123 | } | |
3124 | } | |
3125 | } | |
3275e7cc | 3126 | |
c018ad3d AQ |
3127 | /** |
3128 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3129 | * @bat_priv: the bat priv with all the soft interface information | |
3130 | * @addr: the mac address of the client to check | |
3131 | * @vid: VLAN identifier | |
3132 | * | |
3133 | * Returns true if we know that the client has moved from its old originator | |
3134 | * to another one. This entry is still kept for consistency purposes and will be | |
3135 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3136 | */ |
56303d34 | 3137 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3138 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3139 | { |
56303d34 | 3140 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3141 | bool ret = false; |
3142 | ||
c018ad3d | 3143 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3144 | if (!tt_global_entry) |
3145 | goto out; | |
3146 | ||
c1d07431 | 3147 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3148 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3149 | out: |
3150 | return ret; | |
3151 | } | |
30cfd02b | 3152 | |
7c1fd91d AQ |
3153 | /** |
3154 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3155 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3156 | * @addr: the mac address of the local client to query |
3157 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3158 | * |
3159 | * Returns true if the local client is known to be roaming (it is not served by | |
3160 | * this node anymore) or not. If yes, the client is still present in the table | |
3161 | * to keep the latter consistent with the node TTVN | |
3162 | */ | |
3163 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3164 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3165 | { |
3166 | struct batadv_tt_local_entry *tt_local_entry; | |
3167 | bool ret = false; | |
3168 | ||
c018ad3d | 3169 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3170 | if (!tt_local_entry) |
3171 | goto out; | |
3172 | ||
3173 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3174 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3175 | out: | |
3176 | return ret; | |
7c1fd91d AQ |
3177 | } |
3178 | ||
30cfd02b AQ |
3179 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3180 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3181 | const unsigned char *addr, |
16052789 | 3182 | unsigned short vid) |
30cfd02b AQ |
3183 | { |
3184 | bool ret = false; | |
3185 | ||
16052789 | 3186 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3187 | BATADV_TT_CLIENT_TEMP, |
3188 | atomic_read(&orig_node->last_ttvn))) | |
3189 | goto out; | |
3190 | ||
3191 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3192 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3193 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3194 | ret = true; |
3195 | out: | |
3196 | return ret; | |
3197 | } | |
e1bf0c14 ML |
3198 | |
3199 | /** | |
3200 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3201 | * @bat_priv: the bat priv with all the soft interface information | |
3202 | * @orig: the orig_node of the ogm | |
3203 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3204 | * @tvlv_value: tvlv buffer containing the gateway data | |
3205 | * @tvlv_value_len: tvlv buffer length | |
3206 | */ | |
3207 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3208 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3209 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3210 | uint16_t tvlv_value_len) |
3211 | { | |
7ea7b4a1 AQ |
3212 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3213 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3214 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3215 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3216 | |
3217 | if (tvlv_value_len < sizeof(*tt_data)) | |
3218 | return; | |
3219 | ||
3220 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3221 | tvlv_value_len -= sizeof(*tt_data); | |
3222 | ||
7ea7b4a1 AQ |
3223 | num_vlan = ntohs(tt_data->num_vlan); |
3224 | ||
3225 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3226 | return; | |
3227 | ||
3228 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3229 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3230 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3231 | ||
298e6e68 | 3232 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3233 | |
7ea7b4a1 AQ |
3234 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3235 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3236 | } |
3237 | ||
335fbe0f ML |
3238 | /** |
3239 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3240 | * container | |
3241 | * @bat_priv: the bat priv with all the soft interface information | |
3242 | * @src: mac address of tt tvlv sender | |
3243 | * @dst: mac address of tt tvlv recipient | |
3244 | * @tvlv_value: tvlv buffer containing the tt data | |
3245 | * @tvlv_value_len: tvlv buffer length | |
3246 | * | |
3247 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3248 | * otherwise. | |
3249 | */ | |
3250 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3251 | uint8_t *src, uint8_t *dst, | |
3252 | void *tvlv_value, | |
3253 | uint16_t tvlv_value_len) | |
3254 | { | |
3255 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3256 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3257 | char tt_flag; |
3258 | bool ret; | |
3259 | ||
3260 | if (tvlv_value_len < sizeof(*tt_data)) | |
3261 | return NET_RX_SUCCESS; | |
3262 | ||
3263 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3264 | tvlv_value_len -= sizeof(*tt_data); | |
3265 | ||
7ea7b4a1 AQ |
3266 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3267 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3268 | ||
3269 | if (tvlv_value_len < tt_vlan_len) | |
3270 | return NET_RX_SUCCESS; | |
3271 | ||
3272 | tvlv_value_len -= tt_vlan_len; | |
3273 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3274 | |
3275 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3276 | case BATADV_TT_REQUEST: | |
3277 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3278 | ||
3279 | /* If this node cannot provide a TT response the tt_request is | |
3280 | * forwarded | |
3281 | */ | |
3282 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3283 | if (!ret) { | |
3284 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3285 | tt_flag = 'F'; | |
3286 | else | |
3287 | tt_flag = '.'; | |
3288 | ||
3289 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3290 | "Routing TT_REQUEST to %pM [%c]\n", | |
3291 | dst, tt_flag); | |
3292 | /* tvlv API will re-route the packet */ | |
3293 | return NET_RX_DROP; | |
3294 | } | |
3295 | break; | |
3296 | case BATADV_TT_RESPONSE: | |
3297 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3298 | ||
3299 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3300 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3301 | src, tt_num_entries); |
335fbe0f ML |
3302 | return NET_RX_SUCCESS; |
3303 | } | |
3304 | ||
3305 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3306 | tt_flag = 'F'; | |
3307 | else | |
3308 | tt_flag = '.'; | |
3309 | ||
3310 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3311 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3312 | ||
3313 | /* tvlv API will re-route the packet */ | |
3314 | return NET_RX_DROP; | |
3315 | } | |
3316 | ||
3317 | return NET_RX_SUCCESS; | |
3318 | } | |
3319 | ||
122edaa0 ML |
3320 | /** |
3321 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3322 | * @bat_priv: the bat priv with all the soft interface information | |
3323 | * @src: mac address of tt tvlv sender | |
3324 | * @dst: mac address of tt tvlv recipient | |
3325 | * @tvlv_value: tvlv buffer containing the tt data | |
3326 | * @tvlv_value_len: tvlv buffer length | |
3327 | * | |
3328 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3329 | * otherwise. | |
3330 | */ | |
3331 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3332 | uint8_t *src, uint8_t *dst, | |
3333 | void *tvlv_value, | |
3334 | uint16_t tvlv_value_len) | |
3335 | { | |
3336 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3337 | struct batadv_orig_node *orig_node = NULL; | |
3338 | ||
3339 | /* If this node is not the intended recipient of the | |
3340 | * roaming advertisement the packet is forwarded | |
3341 | * (the tvlv API will re-route the packet). | |
3342 | */ | |
3343 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3344 | return NET_RX_DROP; | |
3345 | ||
122edaa0 ML |
3346 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3347 | goto out; | |
3348 | ||
3349 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3350 | if (!orig_node) | |
3351 | goto out; | |
3352 | ||
3353 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3354 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3355 | ||
3356 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3357 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3358 | src, roaming_adv->client); | |
3359 | ||
3360 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3361 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3362 | atomic_read(&orig_node->last_ttvn) + 1); |
3363 | ||
3364 | out: | |
3365 | if (orig_node) | |
3366 | batadv_orig_node_free_ref(orig_node); | |
3367 | return NET_RX_SUCCESS; | |
3368 | } | |
3369 | ||
e1bf0c14 ML |
3370 | /** |
3371 | * batadv_tt_init - initialise the translation table internals | |
3372 | * @bat_priv: the bat priv with all the soft interface information | |
3373 | * | |
3374 | * Return 0 on success or negative error number in case of failure. | |
3375 | */ | |
3376 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3377 | { | |
3378 | int ret; | |
3379 | ||
3380 | ret = batadv_tt_local_init(bat_priv); | |
3381 | if (ret < 0) | |
3382 | return ret; | |
3383 | ||
3384 | ret = batadv_tt_global_init(bat_priv); | |
3385 | if (ret < 0) | |
3386 | return ret; | |
3387 | ||
3388 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3389 | batadv_tt_tvlv_unicast_handler_v1, |
3390 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3391 | |
122edaa0 ML |
3392 | batadv_tvlv_handler_register(bat_priv, NULL, |
3393 | batadv_roam_tvlv_unicast_handler_v1, | |
3394 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3395 | ||
e1bf0c14 ML |
3396 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3397 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3398 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3399 | ||
3400 | return 1; | |
3401 | } |