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e19f9759 | 1 | /* Copyright (C) 2007-2014 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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
18 | #include "main.h" | |
19 | #include "translation-table.h" | |
20 | #include "soft-interface.h" | |
32ae9b22 | 21 | #include "hard-interface.h" |
a73105b8 | 22 | #include "send.h" |
c6c8fea2 SE |
23 | #include "hash.h" |
24 | #include "originator.h" | |
a73105b8 | 25 | #include "routing.h" |
20ff9d59 | 26 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 27 | |
ced72933 | 28 | #include <linux/crc32c.h> |
a73105b8 | 29 | |
dec05074 AQ |
30 | /* hash class keys */ |
31 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
32 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
33 | ||
56303d34 | 34 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 35 | unsigned short vid, |
56303d34 | 36 | struct batadv_orig_node *orig_node); |
a513088d SE |
37 | static void batadv_tt_purge(struct work_struct *work); |
38 | static void | |
56303d34 | 39 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
40 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
41 | struct batadv_orig_node *orig_node, | |
42 | const unsigned char *addr, | |
c018ad3d AQ |
43 | unsigned short vid, const char *message, |
44 | bool roaming); | |
c6c8fea2 | 45 | |
7aadf889 | 46 | /* returns 1 if they are the same mac addr */ |
a513088d | 47 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 48 | { |
56303d34 | 49 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 50 | hash_entry); |
7aadf889 | 51 | |
323813ed | 52 | return batadv_compare_eth(data1, data2); |
7aadf889 ML |
53 | } |
54 | ||
c018ad3d AQ |
55 | /** |
56 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
57 | * @data: pointer to the tt_common_entry object to map | |
58 | * @size: the size of the hash table | |
59 | * | |
60 | * Returns the hash index where the object represented by 'data' should be | |
61 | * stored at. | |
62 | */ | |
63 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
64 | { | |
65 | struct batadv_tt_common_entry *tt; | |
66 | uint32_t hash = 0; | |
67 | ||
68 | tt = (struct batadv_tt_common_entry *)data; | |
69 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
70 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
71 | ||
72 | hash += (hash << 3); | |
73 | hash ^= (hash >> 11); | |
74 | hash += (hash << 15); | |
75 | ||
76 | return hash % size; | |
77 | } | |
78 | ||
79 | /** | |
80 | * batadv_tt_hash_find - look for a client in the given hash table | |
81 | * @hash: the hash table to search | |
82 | * @addr: the mac address of the client to look for | |
83 | * @vid: VLAN identifier | |
84 | * | |
85 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
86 | * found, NULL otherwise. | |
87 | */ | |
56303d34 | 88 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
89 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
90 | unsigned short vid) | |
7aadf889 | 91 | { |
7aadf889 | 92 | struct hlist_head *head; |
c018ad3d | 93 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 94 | uint32_t index; |
7aadf889 ML |
95 | |
96 | if (!hash) | |
97 | return NULL; | |
98 | ||
8fdd0153 | 99 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
100 | to_search.vid = vid; |
101 | ||
102 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
103 | head = &hash->table[index]; |
104 | ||
105 | rcu_read_lock(); | |
c018ad3d AQ |
106 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
107 | if (!batadv_compare_eth(tt, addr)) | |
108 | continue; | |
109 | ||
110 | if (tt->vid != vid) | |
7aadf889 ML |
111 | continue; |
112 | ||
c018ad3d | 113 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
114 | continue; |
115 | ||
c018ad3d | 116 | tt_tmp = tt; |
7aadf889 ML |
117 | break; |
118 | } | |
119 | rcu_read_unlock(); | |
120 | ||
c018ad3d | 121 | return tt_tmp; |
7aadf889 ML |
122 | } |
123 | ||
c018ad3d AQ |
124 | /** |
125 | * batadv_tt_local_hash_find - search the local table for a given client | |
126 | * @bat_priv: the bat priv with all the soft interface information | |
127 | * @addr: the mac address of the client to look for | |
128 | * @vid: VLAN identifier | |
129 | * | |
130 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
131 | * found, NULL otherwise. | |
132 | */ | |
56303d34 | 133 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
134 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
135 | unsigned short vid) | |
7aadf889 | 136 | { |
56303d34 SE |
137 | struct batadv_tt_common_entry *tt_common_entry; |
138 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 139 | |
c018ad3d AQ |
140 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
141 | vid); | |
48100bac AQ |
142 | if (tt_common_entry) |
143 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
144 | struct batadv_tt_local_entry, |
145 | common); | |
48100bac AQ |
146 | return tt_local_entry; |
147 | } | |
7aadf889 | 148 | |
c018ad3d AQ |
149 | /** |
150 | * batadv_tt_global_hash_find - search the global table for a given client | |
151 | * @bat_priv: the bat priv with all the soft interface information | |
152 | * @addr: the mac address of the client to look for | |
153 | * @vid: VLAN identifier | |
154 | * | |
155 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
156 | * is found, NULL otherwise. | |
157 | */ | |
56303d34 | 158 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
159 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
160 | unsigned short vid) | |
48100bac | 161 | { |
56303d34 SE |
162 | struct batadv_tt_common_entry *tt_common_entry; |
163 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 164 | |
c018ad3d AQ |
165 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
166 | vid); | |
48100bac AQ |
167 | if (tt_common_entry) |
168 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
169 | struct batadv_tt_global_entry, |
170 | common); | |
48100bac | 171 | return tt_global_entry; |
7aadf889 ML |
172 | } |
173 | ||
a513088d | 174 | static void |
56303d34 | 175 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 176 | { |
48100bac AQ |
177 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
178 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
179 | } |
180 | ||
21026059 AQ |
181 | /** |
182 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
183 | * tt_global_entry and possibly free it | |
184 | * @tt_global_entry: the object to free | |
185 | */ | |
a513088d | 186 | static void |
56303d34 | 187 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 188 | { |
db08e6e5 | 189 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 190 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 191 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
192 | } |
193 | } | |
194 | ||
a513088d | 195 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 196 | { |
56303d34 | 197 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 198 | |
56303d34 | 199 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
200 | |
201 | /* We are in an rcu callback here, therefore we cannot use | |
202 | * batadv_orig_node_free_ref() and its call_rcu(): | |
203 | * An rcu_barrier() wouldn't wait for that to finish | |
204 | */ | |
205 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
206 | kfree(orig_entry); |
207 | } | |
208 | ||
7ea7b4a1 AQ |
209 | /** |
210 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
211 | * by vid | |
212 | * @bat_priv: the bat priv with all the soft interface information | |
213 | * @vid: the VLAN identifier of the sub-table to change | |
214 | * @v: the amount to sum to the local table size | |
215 | */ | |
216 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
217 | unsigned short vid, int v) | |
218 | { | |
219 | struct batadv_softif_vlan *vlan; | |
220 | ||
221 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
222 | if (!vlan) | |
223 | return; | |
224 | ||
225 | atomic_add(v, &vlan->tt.num_entries); | |
226 | ||
227 | batadv_softif_vlan_free_ref(vlan); | |
228 | } | |
229 | ||
230 | /** | |
231 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
232 | * vid | |
233 | * @bat_priv: the bat priv with all the soft interface information | |
234 | * @vid: the VLAN identifier | |
235 | */ | |
236 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
237 | unsigned short vid) | |
238 | { | |
239 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
240 | } | |
241 | ||
242 | /** | |
243 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
244 | * vid | |
245 | * @bat_priv: the bat priv with all the soft interface information | |
246 | * @vid: the VLAN identifier | |
247 | */ | |
248 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
249 | unsigned short vid) | |
250 | { | |
251 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
252 | } | |
253 | ||
254 | /** | |
255 | * batadv_tt_global_size_mod - change the size by v of the local table | |
256 | * identified by vid | |
257 | * @bat_priv: the bat priv with all the soft interface information | |
258 | * @vid: the VLAN identifier | |
259 | * @v: the amount to sum to the global table size | |
260 | */ | |
261 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
262 | unsigned short vid, int v) | |
263 | { | |
264 | struct batadv_orig_node_vlan *vlan; | |
265 | ||
266 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
267 | if (!vlan) | |
268 | return; | |
269 | ||
270 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
271 | spin_lock_bh(&orig_node->vlan_list_lock); | |
272 | list_del_rcu(&vlan->list); | |
273 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
274 | batadv_orig_node_vlan_free_ref(vlan); | |
275 | } | |
276 | ||
277 | batadv_orig_node_vlan_free_ref(vlan); | |
278 | } | |
279 | ||
280 | /** | |
281 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
282 | * given vid | |
283 | * @orig_node: the originator which global table size has to be decreased | |
284 | * @vid: the vlan identifier | |
285 | */ | |
286 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
287 | unsigned short vid) | |
288 | { | |
289 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
290 | } | |
291 | ||
292 | /** | |
293 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
294 | * given vid | |
295 | * @orig_node: the originator which global table size has to be decreased | |
296 | * @vid: the vlan identifier | |
297 | */ | |
298 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
299 | unsigned short vid) | |
300 | { | |
301 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
302 | } | |
303 | ||
a513088d | 304 | static void |
56303d34 | 305 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 306 | { |
d657e621 AQ |
307 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
308 | return; | |
7ea7b4a1 | 309 | |
a513088d | 310 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
311 | } |
312 | ||
3abe4adb AQ |
313 | /** |
314 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
315 | * @bat_priv: the bat priv with all the soft interface information | |
316 | * @tt_local_entry: the TT entry involved in the event | |
317 | * @event_flags: flags to store in the event structure | |
318 | */ | |
56303d34 | 319 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
320 | struct batadv_tt_local_entry *tt_local_entry, |
321 | uint8_t event_flags) | |
a73105b8 | 322 | { |
56303d34 | 323 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
324 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
325 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
326 | bool event_removed = false; |
327 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
328 | |
329 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
330 | if (!tt_change_node) |
331 | return; | |
332 | ||
ff66c975 | 333 | tt_change_node->change.flags = flags; |
ca663046 AQ |
334 | memset(tt_change_node->change.reserved, 0, |
335 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 336 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 337 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 338 | |
acd34afa | 339 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
340 | |
341 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
342 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
343 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 344 | list) { |
3abe4adb | 345 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
346 | continue; |
347 | ||
348 | /* DEL+ADD in the same orig interval have no effect and can be | |
349 | * removed to avoid silly behaviour on the receiver side. The | |
350 | * other way around (ADD+DEL) can happen in case of roaming of | |
351 | * a client still in the NEW state. Roaming of NEW clients is | |
352 | * now possible due to automatically recognition of "temporary" | |
353 | * clients | |
354 | */ | |
acd34afa | 355 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
356 | if (!del_op_requested && del_op_entry) |
357 | goto del; | |
358 | if (del_op_requested && !del_op_entry) | |
359 | goto del; | |
3c4f7ab6 AQ |
360 | |
361 | /* this is a second add in the same originator interval. It | |
362 | * means that flags have been changed: update them! | |
363 | */ | |
364 | if (!del_op_requested && !del_op_entry) | |
365 | entry->change.flags = flags; | |
366 | ||
3b643de5 AQ |
367 | continue; |
368 | del: | |
369 | list_del(&entry->list); | |
370 | kfree(entry); | |
155e4e12 | 371 | kfree(tt_change_node); |
3b643de5 AQ |
372 | event_removed = true; |
373 | goto unlock; | |
374 | } | |
375 | ||
a73105b8 | 376 | /* track the change in the OGMinterval list */ |
807736f6 | 377 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
378 | |
379 | unlock: | |
807736f6 | 380 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 381 | |
3b643de5 | 382 | if (event_removed) |
807736f6 | 383 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 384 | else |
807736f6 | 385 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
386 | } |
387 | ||
335fbe0f ML |
388 | /** |
389 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
390 | * @changes_num: number of tt changes | |
391 | * | |
392 | * Returns computed length in bytes. | |
393 | */ | |
394 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 395 | { |
335fbe0f | 396 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
397 | } |
398 | ||
298e6e68 AQ |
399 | /** |
400 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
401 | * @tt_len: available space | |
402 | * | |
403 | * Returns the number of entries. | |
404 | */ | |
405 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
406 | { | |
407 | return tt_len / batadv_tt_len(1); | |
408 | } | |
409 | ||
a19d3d85 ML |
410 | /** |
411 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
412 | * size when transmitted over the air | |
413 | * @bat_priv: the bat priv with all the soft interface information | |
414 | * | |
415 | * Returns local translation table size in bytes. | |
416 | */ | |
417 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
418 | { | |
419 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
420 | struct batadv_softif_vlan *vlan; | |
421 | int hdr_size; | |
422 | ||
423 | rcu_read_lock(); | |
424 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
425 | num_vlan++; | |
426 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
427 | } | |
428 | rcu_read_unlock(); | |
429 | ||
430 | /* header size of tvlv encapsulated tt response payload */ | |
431 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
432 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
433 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
434 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
435 | ||
436 | return hdr_size + batadv_tt_len(tt_local_entries); | |
437 | } | |
438 | ||
56303d34 | 439 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 440 | { |
807736f6 | 441 | if (bat_priv->tt.local_hash) |
5346c35e | 442 | return 0; |
c6c8fea2 | 443 | |
807736f6 | 444 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 445 | |
807736f6 | 446 | if (!bat_priv->tt.local_hash) |
5346c35e | 447 | return -ENOMEM; |
c6c8fea2 | 448 | |
dec05074 AQ |
449 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
450 | &batadv_tt_local_hash_lock_class_key); | |
451 | ||
5346c35e | 452 | return 0; |
c6c8fea2 SE |
453 | } |
454 | ||
068ee6e2 AQ |
455 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
456 | struct batadv_tt_global_entry *tt_global, | |
457 | const char *message) | |
458 | { | |
459 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
460 | "Deleting global tt entry %pM (vid: %d): %s\n", |
461 | tt_global->common.addr, | |
462 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
463 | |
464 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 465 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 466 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
467 | } |
468 | ||
c018ad3d AQ |
469 | /** |
470 | * batadv_tt_local_add - add a new client to the local table or update an | |
471 | * existing client | |
472 | * @soft_iface: netdev struct of the mesh interface | |
473 | * @addr: the mac address of the client to add | |
474 | * @vid: VLAN identifier | |
475 | * @ifindex: index of the interface where the client is connected to (useful to | |
476 | * identify wireless clients) | |
9464d071 AQ |
477 | * @mark: the value contained in the skb->mark field of the received packet (if |
478 | * any) | |
a19d3d85 ML |
479 | * |
480 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 481 | */ |
a19d3d85 | 482 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
9464d071 | 483 | unsigned short vid, int ifindex, uint32_t mark) |
c6c8fea2 | 484 | { |
56303d34 | 485 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
486 | struct batadv_tt_local_entry *tt_local; |
487 | struct batadv_tt_global_entry *tt_global; | |
0c69aecc | 488 | struct net_device *in_dev = NULL; |
db08e6e5 | 489 | struct hlist_head *head; |
56303d34 | 490 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
491 | int hash_added, table_size, packet_size_max; |
492 | bool ret = false, roamed_back = false; | |
3c4f7ab6 | 493 | uint8_t remote_flags; |
9464d071 | 494 | uint32_t match_mark; |
c6c8fea2 | 495 | |
0c69aecc AQ |
496 | if (ifindex != BATADV_NULL_IFINDEX) |
497 | in_dev = dev_get_by_index(&init_net, ifindex); | |
498 | ||
c018ad3d AQ |
499 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
500 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 501 | |
47c94655 AQ |
502 | if (tt_local) { |
503 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
504 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
505 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
506 | "Re-adding pending client %pM (vid: %d)\n", |
507 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
508 | /* whatever the reason why the PENDING flag was set, |
509 | * this is a client which was enqueued to be removed in | |
510 | * this orig_interval. Since it popped up again, the | |
511 | * flag can be reset like it was never enqueued | |
512 | */ | |
513 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
514 | goto add_event; | |
515 | } | |
516 | ||
517 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
518 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
519 | "Roaming client %pM (vid: %d) came back to its original location\n", |
520 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
521 | /* the ROAM flag is set because this client roamed away |
522 | * and the node got a roaming_advertisement message. Now | |
523 | * that the client popped up again at its original | |
524 | * location such flag can be unset | |
525 | */ | |
526 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
527 | roamed_back = true; | |
528 | } | |
529 | goto check_roaming; | |
c6c8fea2 SE |
530 | } |
531 | ||
a19d3d85 ML |
532 | /* Ignore the client if we cannot send it in a full table response. */ |
533 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
534 | table_size += batadv_tt_len(1); | |
535 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
536 | if (table_size > packet_size_max) { | |
537 | net_ratelimited_function(batadv_info, soft_iface, | |
538 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
539 | table_size, packet_size_max, addr); | |
540 | goto out; | |
541 | } | |
542 | ||
47c94655 AQ |
543 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
544 | if (!tt_local) | |
7683fdc1 | 545 | goto out; |
a73105b8 | 546 | |
39c75a51 | 547 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
548 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
549 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 550 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 551 | |
8fdd0153 | 552 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
553 | /* The local entry has to be marked as NEW to avoid to send it in |
554 | * a full table response going out before the next ttvn increment | |
555 | * (consistency check) | |
556 | */ | |
557 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 558 | tt_local->common.vid = vid; |
0c69aecc | 559 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
560 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
561 | atomic_set(&tt_local->common.refcount, 2); | |
562 | tt_local->last_seen = jiffies; | |
563 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
564 | |
565 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 566 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 567 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 568 | |
807736f6 | 569 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 570 | batadv_choose_tt, &tt_local->common, |
47c94655 | 571 | &tt_local->common.hash_entry); |
80b3f58c SW |
572 | |
573 | if (unlikely(hash_added != 0)) { | |
574 | /* remove the reference for the hash */ | |
47c94655 | 575 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
576 | goto out; |
577 | } | |
578 | ||
068ee6e2 | 579 | add_event: |
3abe4adb | 580 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 581 | |
068ee6e2 AQ |
582 | check_roaming: |
583 | /* Check whether it is a roaming, but don't do anything if the roaming | |
584 | * process has already been handled | |
585 | */ | |
586 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 587 | /* These node are probably going to update their tt table */ |
47c94655 | 588 | head = &tt_global->orig_list; |
db08e6e5 | 589 | rcu_read_lock(); |
b67bfe0d | 590 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 591 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 592 | tt_global->common.vid, |
a513088d | 593 | orig_entry->orig_node); |
db08e6e5 SW |
594 | } |
595 | rcu_read_unlock(); | |
068ee6e2 AQ |
596 | if (roamed_back) { |
597 | batadv_tt_global_free(bat_priv, tt_global, | |
598 | "Roaming canceled"); | |
599 | tt_global = NULL; | |
600 | } else { | |
601 | /* The global entry has to be marked as ROAMING and | |
602 | * has to be kept for consistency purpose | |
603 | */ | |
604 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
605 | tt_global->roam_at = jiffies; | |
606 | } | |
7683fdc1 | 607 | } |
068ee6e2 | 608 | |
3c4f7ab6 AQ |
609 | /* store the current remote flags before altering them. This helps |
610 | * understanding is flags are changing or not | |
611 | */ | |
612 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
613 | ||
614 | if (batadv_is_wifi_netdev(in_dev)) | |
615 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
616 | else | |
617 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 618 | |
9464d071 AQ |
619 | /* check the mark in the skb: if it's equal to the configured |
620 | * isolation_mark, it means the packet is coming from an isolated | |
621 | * non-mesh client | |
622 | */ | |
623 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
624 | if (bat_priv->isolation_mark_mask && | |
625 | match_mark == bat_priv->isolation_mark) | |
626 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
627 | else | |
628 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
629 | ||
3c4f7ab6 AQ |
630 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
631 | * entry so that all the nodes can get the new flags | |
632 | */ | |
633 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
634 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
635 | ||
636 | ret = true; | |
7683fdc1 | 637 | out: |
0c69aecc AQ |
638 | if (in_dev) |
639 | dev_put(in_dev); | |
47c94655 AQ |
640 | if (tt_local) |
641 | batadv_tt_local_entry_free_ref(tt_local); | |
642 | if (tt_global) | |
643 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 644 | return ret; |
c6c8fea2 SE |
645 | } |
646 | ||
7ea7b4a1 AQ |
647 | /** |
648 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
649 | * within a TT Response directed to another node | |
650 | * @orig_node: originator for which the TT data has to be prepared | |
651 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
652 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
653 | * changed can be stored | |
654 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
655 | * function reserves the amount of space needed to send the entire global TT | |
656 | * table. In case of success the value is updated with the real amount of | |
657 | * reserved bytes | |
658 | ||
659 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
660 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
661 | * objects, one per active VLAN served by the originator node. | |
662 | * | |
663 | * Return the size of the allocated buffer or 0 in case of failure. | |
664 | */ | |
665 | static uint16_t | |
666 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
667 | struct batadv_tvlv_tt_data **tt_data, | |
668 | struct batadv_tvlv_tt_change **tt_change, | |
669 | int32_t *tt_len) | |
670 | { | |
671 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
672 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
673 | struct batadv_orig_node_vlan *vlan; | |
674 | uint8_t *tt_change_ptr; | |
675 | ||
676 | rcu_read_lock(); | |
677 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
678 | num_vlan++; | |
679 | num_entries += atomic_read(&vlan->tt.num_entries); | |
680 | } | |
681 | ||
682 | change_offset = sizeof(**tt_data); | |
683 | change_offset += num_vlan * sizeof(*tt_vlan); | |
684 | ||
685 | /* if tt_len is negative, allocate the space needed by the full table */ | |
686 | if (*tt_len < 0) | |
687 | *tt_len = batadv_tt_len(num_entries); | |
688 | ||
689 | tvlv_len = *tt_len; | |
690 | tvlv_len += change_offset; | |
691 | ||
692 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
693 | if (!*tt_data) { | |
694 | *tt_len = 0; | |
695 | goto out; | |
696 | } | |
697 | ||
698 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
699 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
700 | (*tt_data)->num_vlan = htons(num_vlan); | |
701 | ||
702 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
703 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
704 | tt_vlan->vid = htons(vlan->vid); | |
705 | tt_vlan->crc = htonl(vlan->tt.crc); | |
706 | ||
707 | tt_vlan++; | |
708 | } | |
709 | ||
710 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
711 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
712 | ||
713 | out: | |
714 | rcu_read_unlock(); | |
715 | return tvlv_len; | |
716 | } | |
717 | ||
718 | /** | |
719 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
720 | * node | |
721 | * @bat_priv: the bat priv with all the soft interface information | |
722 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
723 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
724 | * changes can be stored | |
725 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
726 | * function reserves the amount of space needed to send the entire local TT | |
727 | * table. In case of success the value is updated with the real amount of | |
728 | * reserved bytes | |
729 | * | |
730 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
731 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
732 | * objects, one per active VLAN. | |
733 | * | |
734 | * Return the size of the allocated buffer or 0 in case of failure. | |
735 | */ | |
736 | static uint16_t | |
737 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
738 | struct batadv_tvlv_tt_data **tt_data, | |
739 | struct batadv_tvlv_tt_change **tt_change, | |
740 | int32_t *tt_len) | |
741 | { | |
742 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
743 | struct batadv_softif_vlan *vlan; | |
744 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
745 | uint8_t *tt_change_ptr; | |
746 | int change_offset; | |
747 | ||
748 | rcu_read_lock(); | |
749 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
750 | num_vlan++; | |
751 | num_entries += atomic_read(&vlan->tt.num_entries); | |
752 | } | |
753 | ||
754 | change_offset = sizeof(**tt_data); | |
755 | change_offset += num_vlan * sizeof(*tt_vlan); | |
756 | ||
757 | /* if tt_len is negative, allocate the space needed by the full table */ | |
758 | if (*tt_len < 0) | |
759 | *tt_len = batadv_tt_len(num_entries); | |
760 | ||
761 | tvlv_len = *tt_len; | |
762 | tvlv_len += change_offset; | |
763 | ||
764 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
765 | if (!*tt_data) { | |
766 | tvlv_len = 0; | |
767 | goto out; | |
768 | } | |
769 | ||
770 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
771 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
772 | (*tt_data)->num_vlan = htons(num_vlan); | |
773 | ||
774 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
775 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
776 | tt_vlan->vid = htons(vlan->vid); | |
777 | tt_vlan->crc = htonl(vlan->tt.crc); | |
778 | ||
779 | tt_vlan++; | |
780 | } | |
781 | ||
782 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
783 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
784 | ||
785 | out: | |
786 | rcu_read_unlock(); | |
787 | return tvlv_len; | |
788 | } | |
789 | ||
e1bf0c14 ML |
790 | /** |
791 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
792 | * after local tt changes have been committed | |
793 | * @bat_priv: the bat priv with all the soft interface information | |
794 | */ | |
795 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 796 | { |
e1bf0c14 ML |
797 | struct batadv_tt_change_node *entry, *safe; |
798 | struct batadv_tvlv_tt_data *tt_data; | |
799 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 800 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 801 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 802 | uint16_t tvlv_len; |
be9aa4c1 | 803 | |
7ea7b4a1 AQ |
804 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
805 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
806 | |
807 | /* if we have too many changes for one packet don't send any | |
808 | * and wait for the tt table request which will be fragmented | |
809 | */ | |
e1bf0c14 ML |
810 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
811 | tt_diff_len = 0; | |
be9aa4c1 | 812 | |
7ea7b4a1 AQ |
813 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
814 | &tt_change, &tt_diff_len); | |
815 | if (!tvlv_len) | |
e1bf0c14 | 816 | return; |
be9aa4c1 | 817 | |
e1bf0c14 | 818 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 819 | |
e1bf0c14 ML |
820 | if (tt_diff_len == 0) |
821 | goto container_register; | |
be9aa4c1 | 822 | |
807736f6 SE |
823 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
824 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 825 | |
807736f6 | 826 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 827 | list) { |
e1bf0c14 ML |
828 | if (tt_diff_entries_count < tt_diff_entries_num) { |
829 | memcpy(tt_change + tt_diff_entries_count, | |
830 | &entry->change, | |
831 | sizeof(struct batadv_tvlv_tt_change)); | |
832 | tt_diff_entries_count++; | |
c6c8fea2 | 833 | } |
a73105b8 AQ |
834 | list_del(&entry->list); |
835 | kfree(entry); | |
c6c8fea2 | 836 | } |
807736f6 | 837 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
838 | |
839 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
840 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
841 | kfree(bat_priv->tt.last_changeset); | |
842 | bat_priv->tt.last_changeset_len = 0; | |
843 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 844 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 845 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 846 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 847 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
848 | * instead of providing the diff |
849 | */ | |
e1bf0c14 | 850 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 851 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
852 | memcpy(bat_priv->tt.last_changeset, |
853 | tt_change, tt_change_len); | |
854 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
855 | } |
856 | } | |
807736f6 | 857 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 858 | |
e1bf0c14 ML |
859 | container_register: |
860 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 861 | tvlv_len); |
e1bf0c14 | 862 | kfree(tt_data); |
c6c8fea2 SE |
863 | } |
864 | ||
08c36d3e | 865 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
866 | { |
867 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 868 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 869 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 870 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 871 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 872 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 873 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 874 | struct hlist_head *head; |
7ea7b4a1 | 875 | unsigned short vid; |
c90681b8 | 876 | uint32_t i; |
85766a82 AQ |
877 | int last_seen_secs; |
878 | int last_seen_msecs; | |
879 | unsigned long last_seen_jiffies; | |
880 | bool no_purge; | |
881 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 882 | |
30da63a6 ML |
883 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
884 | if (!primary_if) | |
32ae9b22 | 885 | goto out; |
c6c8fea2 | 886 | |
86ceb360 | 887 | seq_printf(seq, |
7ea7b4a1 AQ |
888 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
889 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 890 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 891 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 892 | |
c6c8fea2 SE |
893 | for (i = 0; i < hash->size; i++) { |
894 | head = &hash->table[i]; | |
895 | ||
7aadf889 | 896 | rcu_read_lock(); |
b67bfe0d | 897 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 898 | head, hash_entry) { |
85766a82 AQ |
899 | tt_local = container_of(tt_common_entry, |
900 | struct batadv_tt_local_entry, | |
901 | common); | |
7ea7b4a1 | 902 | vid = tt_common_entry->vid; |
85766a82 AQ |
903 | last_seen_jiffies = jiffies - tt_local->last_seen; |
904 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
905 | last_seen_secs = last_seen_msecs / 1000; | |
906 | last_seen_msecs = last_seen_msecs % 1000; | |
907 | ||
908 | no_purge = tt_common_entry->flags & np_flag; | |
909 | ||
7ea7b4a1 AQ |
910 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
911 | if (!vlan) { | |
912 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
913 | BATADV_PRINT_VID(vid)); | |
914 | continue; | |
915 | } | |
916 | ||
917 | seq_printf(seq, | |
dd24ddb2 | 918 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 919 | tt_common_entry->addr, |
16052789 | 920 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 921 | (tt_common_entry->flags & |
acd34afa | 922 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 923 | no_purge ? 'P' : '.', |
7c64fd98 | 924 | (tt_common_entry->flags & |
acd34afa | 925 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 926 | (tt_common_entry->flags & |
acd34afa | 927 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 928 | (tt_common_entry->flags & |
85766a82 | 929 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 AQ |
930 | (tt_common_entry->flags & |
931 | BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), | |
a7966d90 | 932 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
933 | no_purge ? 0 : last_seen_msecs, |
934 | vlan->tt.crc); | |
935 | ||
936 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 937 | } |
7aadf889 | 938 | rcu_read_unlock(); |
c6c8fea2 | 939 | } |
32ae9b22 ML |
940 | out: |
941 | if (primary_if) | |
e5d89254 | 942 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 943 | return 0; |
c6c8fea2 SE |
944 | } |
945 | ||
56303d34 SE |
946 | static void |
947 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
948 | struct batadv_tt_local_entry *tt_local_entry, | |
949 | uint16_t flags, const char *message) | |
c6c8fea2 | 950 | { |
3abe4adb | 951 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 952 | |
015758d0 AQ |
953 | /* The local client has to be marked as "pending to be removed" but has |
954 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
955 | * response issued before the net ttvn increment (consistency check) |
956 | */ | |
acd34afa | 957 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 958 | |
39c75a51 | 959 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
960 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
961 | tt_local_entry->common.addr, | |
962 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
963 | } |
964 | ||
7f91d06c AQ |
965 | /** |
966 | * batadv_tt_local_remove - logically remove an entry from the local table | |
967 | * @bat_priv: the bat priv with all the soft interface information | |
968 | * @addr: the MAC address of the client to remove | |
c018ad3d | 969 | * @vid: VLAN identifier |
7f91d06c AQ |
970 | * @message: message to append to the log on deletion |
971 | * @roaming: true if the deletion is due to a roaming event | |
972 | * | |
973 | * Returns the flags assigned to the local entry before being deleted | |
974 | */ | |
975 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
976 | const uint8_t *addr, unsigned short vid, |
977 | const char *message, bool roaming) | |
c6c8fea2 | 978 | { |
170173bf | 979 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 980 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 981 | |
c018ad3d | 982 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
983 | if (!tt_local_entry) |
984 | goto out; | |
985 | ||
7f91d06c AQ |
986 | curr_flags = tt_local_entry->common.flags; |
987 | ||
acd34afa | 988 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
989 | /* if this global entry addition is due to a roaming, the node has to |
990 | * mark the local entry as "roamed" in order to correctly reroute | |
991 | * packets later | |
992 | */ | |
7c1fd91d | 993 | if (roaming) { |
acd34afa | 994 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
995 | /* mark the local client as ROAMed */ |
996 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
997 | } | |
42d0b044 | 998 | |
068ee6e2 AQ |
999 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1000 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1001 | message); | |
1002 | goto out; | |
1003 | } | |
1004 | /* if this client has been added right now, it is possible to | |
1005 | * immediately purge it | |
1006 | */ | |
3abe4adb | 1007 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
1008 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
1009 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 1010 | |
7683fdc1 AQ |
1011 | out: |
1012 | if (tt_local_entry) | |
a513088d | 1013 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1014 | |
1015 | return curr_flags; | |
c6c8fea2 SE |
1016 | } |
1017 | ||
a19d3d85 ML |
1018 | /** |
1019 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1020 | * @bat_priv: the bat priv with all the soft interface information | |
1021 | * @head: pointer to the list containing the local tt entries | |
1022 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1023 | * inactive or not | |
1024 | */ | |
56303d34 | 1025 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1026 | struct hlist_head *head, |
1027 | int timeout) | |
c6c8fea2 | 1028 | { |
56303d34 SE |
1029 | struct batadv_tt_local_entry *tt_local_entry; |
1030 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1031 | struct hlist_node *node_tmp; |
acd34afa | 1032 | |
b67bfe0d | 1033 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1034 | hash_entry) { |
1035 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1036 | struct batadv_tt_local_entry, |
1037 | common); | |
acd34afa SE |
1038 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1039 | continue; | |
1040 | ||
1041 | /* entry already marked for deletion */ | |
1042 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1043 | continue; | |
1044 | ||
a19d3d85 | 1045 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1046 | continue; |
1047 | ||
1048 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1049 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1050 | } | |
1051 | } | |
1052 | ||
a19d3d85 ML |
1053 | /** |
1054 | * batadv_tt_local_purge - purge inactive tt local entries | |
1055 | * @bat_priv: the bat priv with all the soft interface information | |
1056 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1057 | * inactive or not | |
1058 | */ | |
1059 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1060 | int timeout) | |
acd34afa | 1061 | { |
807736f6 | 1062 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1063 | struct hlist_head *head; |
7683fdc1 | 1064 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1065 | uint32_t i; |
c6c8fea2 | 1066 | |
c6c8fea2 SE |
1067 | for (i = 0; i < hash->size; i++) { |
1068 | head = &hash->table[i]; | |
7683fdc1 | 1069 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1070 | |
7683fdc1 | 1071 | spin_lock_bh(list_lock); |
a19d3d85 | 1072 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1073 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1074 | } |
c6c8fea2 SE |
1075 | } |
1076 | ||
56303d34 | 1077 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1078 | { |
5bf74e9c | 1079 | struct batadv_hashtable *hash; |
a73105b8 | 1080 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1081 | struct batadv_tt_common_entry *tt_common_entry; |
1082 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1083 | struct hlist_node *node_tmp; |
7683fdc1 | 1084 | struct hlist_head *head; |
c90681b8 | 1085 | uint32_t i; |
a73105b8 | 1086 | |
807736f6 | 1087 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1088 | return; |
1089 | ||
807736f6 | 1090 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1091 | |
1092 | for (i = 0; i < hash->size; i++) { | |
1093 | head = &hash->table[i]; | |
1094 | list_lock = &hash->list_locks[i]; | |
1095 | ||
1096 | spin_lock_bh(list_lock); | |
b67bfe0d | 1097 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1098 | head, hash_entry) { |
b67bfe0d | 1099 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1100 | tt_local = container_of(tt_common_entry, |
1101 | struct batadv_tt_local_entry, | |
1102 | common); | |
1103 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
1104 | } |
1105 | spin_unlock_bh(list_lock); | |
1106 | } | |
1107 | ||
1a8eaf07 | 1108 | batadv_hash_destroy(hash); |
a73105b8 | 1109 | |
807736f6 | 1110 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1111 | } |
1112 | ||
56303d34 | 1113 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1114 | { |
807736f6 | 1115 | if (bat_priv->tt.global_hash) |
5346c35e | 1116 | return 0; |
c6c8fea2 | 1117 | |
807736f6 | 1118 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1119 | |
807736f6 | 1120 | if (!bat_priv->tt.global_hash) |
5346c35e | 1121 | return -ENOMEM; |
c6c8fea2 | 1122 | |
dec05074 AQ |
1123 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1124 | &batadv_tt_global_hash_lock_class_key); | |
1125 | ||
5346c35e | 1126 | return 0; |
c6c8fea2 SE |
1127 | } |
1128 | ||
56303d34 | 1129 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1130 | { |
56303d34 | 1131 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1132 | |
807736f6 | 1133 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1134 | |
807736f6 | 1135 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1136 | list) { |
1137 | list_del(&entry->list); | |
1138 | kfree(entry); | |
1139 | } | |
c6c8fea2 | 1140 | |
807736f6 SE |
1141 | atomic_set(&bat_priv->tt.local_changes, 0); |
1142 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1143 | } |
c6c8fea2 | 1144 | |
d657e621 AQ |
1145 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1146 | * batadv_tt_global_entry list | |
1147 | * | |
1148 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1149 | */ |
d657e621 AQ |
1150 | static struct batadv_tt_orig_list_entry * |
1151 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1152 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1153 | { |
d657e621 | 1154 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1155 | const struct hlist_head *head; |
db08e6e5 SW |
1156 | |
1157 | rcu_read_lock(); | |
1158 | head = &entry->orig_list; | |
b67bfe0d | 1159 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1160 | if (tmp_orig_entry->orig_node != orig_node) |
1161 | continue; | |
1162 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1163 | continue; | |
1164 | ||
1165 | orig_entry = tmp_orig_entry; | |
1166 | break; | |
db08e6e5 SW |
1167 | } |
1168 | rcu_read_unlock(); | |
d657e621 AQ |
1169 | |
1170 | return orig_entry; | |
1171 | } | |
1172 | ||
1173 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1174 | * returns true if found, false otherwise | |
1175 | */ | |
1176 | static bool | |
1177 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1178 | const struct batadv_orig_node *orig_node) | |
1179 | { | |
1180 | struct batadv_tt_orig_list_entry *orig_entry; | |
1181 | bool found = false; | |
1182 | ||
1183 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1184 | if (orig_entry) { | |
1185 | found = true; | |
1186 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1187 | } | |
1188 | ||
db08e6e5 SW |
1189 | return found; |
1190 | } | |
1191 | ||
a513088d | 1192 | static void |
d657e621 | 1193 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1194 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1195 | { |
56303d34 | 1196 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1197 | |
d657e621 | 1198 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1199 | if (orig_entry) { |
1200 | /* refresh the ttvn: the current value could be a bogus one that | |
1201 | * was added during a "temporary client detection" | |
1202 | */ | |
1203 | orig_entry->ttvn = ttvn; | |
d657e621 | 1204 | goto out; |
30cfd02b | 1205 | } |
d657e621 | 1206 | |
db08e6e5 SW |
1207 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1208 | if (!orig_entry) | |
d657e621 | 1209 | goto out; |
db08e6e5 SW |
1210 | |
1211 | INIT_HLIST_NODE(&orig_entry->list); | |
1212 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1213 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1214 | orig_entry->orig_node = orig_node; |
1215 | orig_entry->ttvn = ttvn; | |
d657e621 | 1216 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1217 | |
d657e621 | 1218 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1219 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1220 | &tt_global->orig_list); |
1221 | spin_unlock_bh(&tt_global->list_lock); | |
1222 | out: | |
1223 | if (orig_entry) | |
1224 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1225 | } |
1226 | ||
d4ff40f6 AQ |
1227 | /** |
1228 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1229 | * @bat_priv: the bat priv with all the soft interface information | |
1230 | * @orig_node: the originator announcing the client | |
1231 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1232 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1233 | * @flags: TT flags that have to be set for this non-mesh client |
1234 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1235 | * | |
1236 | * Add a new TT global entry for the given originator. If the entry already | |
1237 | * exists add a new reference to the given originator (a global entry can have | |
1238 | * references to multiple originators) and adjust the flags attribute to reflect | |
1239 | * the function argument. | |
1240 | * If a TT local entry exists for this non-mesh client remove it. | |
1241 | * | |
1242 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1243 | * |
1244 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1245 | */ |
1e5d49fc AQ |
1246 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1247 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1248 | const unsigned char *tt_addr, |
1249 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1250 | uint8_t ttvn) |
a73105b8 | 1251 | { |
170173bf SE |
1252 | struct batadv_tt_global_entry *tt_global_entry; |
1253 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1254 | bool ret = false; |
80b3f58c | 1255 | int hash_added; |
56303d34 | 1256 | struct batadv_tt_common_entry *common; |
7f91d06c | 1257 | uint16_t local_flags; |
c6c8fea2 | 1258 | |
cfd4f757 AQ |
1259 | /* ignore global entries from backbone nodes */ |
1260 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1261 | return true; | |
1262 | ||
c018ad3d AQ |
1263 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1264 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1265 | |
1266 | /* if the node already has a local client for this entry, it has to wait | |
1267 | * for a roaming advertisement instead of manually messing up the global | |
1268 | * table | |
1269 | */ | |
1270 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1271 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1272 | goto out; | |
a73105b8 AQ |
1273 | |
1274 | if (!tt_global_entry) { | |
d4f44692 | 1275 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1276 | if (!tt_global_entry) |
7683fdc1 AQ |
1277 | goto out; |
1278 | ||
c0a55929 | 1279 | common = &tt_global_entry->common; |
8fdd0153 | 1280 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1281 | common->vid = vid; |
db08e6e5 | 1282 | |
d4f44692 | 1283 | common->flags = flags; |
cc47f66e | 1284 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1285 | /* node must store current time in case of roaming. This is |
1286 | * needed to purge this entry out on timeout (if nobody claims | |
1287 | * it) | |
1288 | */ | |
1289 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1290 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1291 | atomic_set(&common->refcount, 2); |
30cfd02b | 1292 | common->added_at = jiffies; |
db08e6e5 SW |
1293 | |
1294 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1295 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 1296 | |
807736f6 | 1297 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1298 | batadv_compare_tt, |
c018ad3d | 1299 | batadv_choose_tt, common, |
a513088d | 1300 | &common->hash_entry); |
80b3f58c SW |
1301 | |
1302 | if (unlikely(hash_added != 0)) { | |
1303 | /* remove the reference for the hash */ | |
a513088d | 1304 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1305 | goto out_remove; |
1306 | } | |
a73105b8 | 1307 | } else { |
068ee6e2 | 1308 | common = &tt_global_entry->common; |
30cfd02b AQ |
1309 | /* If there is already a global entry, we can use this one for |
1310 | * our processing. | |
068ee6e2 AQ |
1311 | * But if we are trying to add a temporary client then here are |
1312 | * two options at this point: | |
1313 | * 1) the global client is not a temporary client: the global | |
1314 | * client has to be left as it is, temporary information | |
1315 | * should never override any already known client state | |
1316 | * 2) the global client is a temporary client: purge the | |
1317 | * originator list and add the new one orig_entry | |
30cfd02b | 1318 | */ |
068ee6e2 AQ |
1319 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1320 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1321 | goto out; | |
1322 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1323 | orig_node)) | |
1324 | goto out_remove; | |
1325 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1326 | goto add_orig_entry; | |
1327 | } | |
30cfd02b AQ |
1328 | |
1329 | /* if the client was temporary added before receiving the first | |
1330 | * OGM announcing it, we have to clear the TEMP flag | |
1331 | */ | |
068ee6e2 | 1332 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1333 | |
e9c00136 AQ |
1334 | /* the change can carry possible "attribute" flags like the |
1335 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1336 | * client entry | |
1337 | */ | |
1338 | tt_global_entry->common.flags |= flags; | |
1339 | ||
acd34afa SE |
1340 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1341 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1342 | * delete + roaming change for this originator. |
1343 | * | |
1344 | * We should first delete the old originator before adding the | |
1345 | * new one. | |
1346 | */ | |
068ee6e2 | 1347 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1348 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1349 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1350 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1351 | } |
1352 | } | |
068ee6e2 | 1353 | add_orig_entry: |
30cfd02b | 1354 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1355 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1356 | |
39c75a51 | 1357 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1358 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1359 | common->addr, BATADV_PRINT_VID(common->vid), | |
1360 | orig_node->orig); | |
1e5d49fc | 1361 | ret = true; |
c6c8fea2 | 1362 | |
80b3f58c | 1363 | out_remove: |
7f91d06c | 1364 | |
a73105b8 | 1365 | /* remove address from local hash if present */ |
c018ad3d | 1366 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1367 | "global tt received", |
c1d07431 | 1368 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1369 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1370 | ||
068ee6e2 AQ |
1371 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1372 | /* this is a normal global add. Therefore the client is not in a | |
1373 | * roaming state anymore. | |
1374 | */ | |
1375 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1376 | ||
7683fdc1 AQ |
1377 | out: |
1378 | if (tt_global_entry) | |
a513088d | 1379 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1380 | if (tt_local_entry) |
1381 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1382 | return ret; |
c6c8fea2 SE |
1383 | } |
1384 | ||
1b371d13 SW |
1385 | /** |
1386 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1387 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1388 | * @tt_global_entry: global translation table entry to be analyzed |
1389 | * | |
1390 | * This functon assumes the caller holds rcu_read_lock(). | |
1391 | * Returns best originator list entry or NULL on errors. | |
1392 | */ | |
1393 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1394 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1395 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1396 | { |
4627456a AQ |
1397 | struct batadv_neigh_node *router, *best_router = NULL; |
1398 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1399 | struct hlist_head *head; |
981d8900 | 1400 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1401 | |
1402 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1403 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1404 | router = batadv_orig_router_get(orig_entry->orig_node, |
1405 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1406 | if (!router) |
1407 | continue; | |
1408 | ||
4627456a | 1409 | if (best_router && |
89652331 SW |
1410 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1411 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1412 | batadv_neigh_node_free_ref(router); |
1413 | continue; | |
981d8900 SE |
1414 | } |
1415 | ||
4627456a AQ |
1416 | /* release the refcount for the "old" best */ |
1417 | if (best_router) | |
1418 | batadv_neigh_node_free_ref(best_router); | |
1419 | ||
1420 | best_entry = orig_entry; | |
1421 | best_router = router; | |
981d8900 SE |
1422 | } |
1423 | ||
4627456a AQ |
1424 | if (best_router) |
1425 | batadv_neigh_node_free_ref(best_router); | |
1426 | ||
981d8900 SE |
1427 | return best_entry; |
1428 | } | |
1429 | ||
1b371d13 SW |
1430 | /** |
1431 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1432 | * for this global entry | |
4627456a | 1433 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1434 | * @tt_global_entry: global translation table entry to be printed |
1435 | * @seq: debugfs table seq_file struct | |
1436 | * | |
1437 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1438 | */ |
a513088d | 1439 | static void |
4627456a AQ |
1440 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1441 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1442 | struct seq_file *seq) |
db08e6e5 | 1443 | { |
981d8900 | 1444 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1445 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1446 | struct batadv_orig_node_vlan *vlan; |
1447 | struct hlist_head *head; | |
db08e6e5 | 1448 | uint8_t last_ttvn; |
7ea7b4a1 | 1449 | uint16_t flags; |
db08e6e5 SW |
1450 | |
1451 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1452 | flags = tt_common_entry->flags; |
1453 | ||
4627456a | 1454 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1455 | if (best_entry) { |
7ea7b4a1 AQ |
1456 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1457 | tt_common_entry->vid); | |
1458 | if (!vlan) { | |
1459 | seq_printf(seq, | |
1460 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1461 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1462 | best_entry->orig_node->orig); | |
1463 | goto print_list; | |
1464 | } | |
1465 | ||
981d8900 | 1466 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1467 | seq_printf(seq, |
dd24ddb2 | 1468 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1469 | '*', tt_global_entry->common.addr, |
16052789 | 1470 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1471 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1472 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1473 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1474 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
dd24ddb2 | 1475 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
981d8900 | 1476 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1477 | |
1478 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1479 | } |
db08e6e5 | 1480 | |
7ea7b4a1 | 1481 | print_list: |
db08e6e5 SW |
1482 | head = &tt_global_entry->orig_list; |
1483 | ||
b67bfe0d | 1484 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1485 | if (best_entry == orig_entry) |
1486 | continue; | |
1487 | ||
7ea7b4a1 AQ |
1488 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1489 | tt_common_entry->vid); | |
1490 | if (!vlan) { | |
1491 | seq_printf(seq, | |
1492 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1493 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1494 | orig_entry->orig_node->orig); | |
1495 | continue; | |
1496 | } | |
1497 | ||
db08e6e5 | 1498 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1499 | seq_printf(seq, |
dd24ddb2 | 1500 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1501 | '+', tt_global_entry->common.addr, |
16052789 | 1502 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1503 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1504 | last_ttvn, vlan->tt.crc, |
acd34afa | 1505 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b | 1506 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 | 1507 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
30cfd02b | 1508 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1509 | |
1510 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1511 | } |
1512 | } | |
1513 | ||
08c36d3e | 1514 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1515 | { |
1516 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1517 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1518 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1519 | struct batadv_tt_common_entry *tt_common_entry; |
1520 | struct batadv_tt_global_entry *tt_global; | |
1521 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1522 | struct hlist_head *head; |
c90681b8 | 1523 | uint32_t i; |
c6c8fea2 | 1524 | |
30da63a6 ML |
1525 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1526 | if (!primary_if) | |
32ae9b22 | 1527 | goto out; |
c6c8fea2 | 1528 | |
2dafb49d AQ |
1529 | seq_printf(seq, |
1530 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1531 | net_dev->name); |
16052789 AQ |
1532 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1533 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1534 | "CRC", "Flags"); | |
c6c8fea2 | 1535 | |
c6c8fea2 SE |
1536 | for (i = 0; i < hash->size; i++) { |
1537 | head = &hash->table[i]; | |
1538 | ||
7aadf889 | 1539 | rcu_read_lock(); |
b67bfe0d | 1540 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1541 | head, hash_entry) { |
56303d34 SE |
1542 | tt_global = container_of(tt_common_entry, |
1543 | struct batadv_tt_global_entry, | |
1544 | common); | |
4627456a | 1545 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1546 | } |
7aadf889 | 1547 | rcu_read_unlock(); |
c6c8fea2 | 1548 | } |
32ae9b22 ML |
1549 | out: |
1550 | if (primary_if) | |
e5d89254 | 1551 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1552 | return 0; |
c6c8fea2 SE |
1553 | } |
1554 | ||
db08e6e5 | 1555 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1556 | static void |
56303d34 | 1557 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1558 | { |
db08e6e5 | 1559 | struct hlist_head *head; |
b67bfe0d | 1560 | struct hlist_node *safe; |
56303d34 | 1561 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1562 | |
db08e6e5 SW |
1563 | spin_lock_bh(&tt_global_entry->list_lock); |
1564 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1565 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1566 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1567 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1568 | tt_global_entry->common.vid); | |
a513088d | 1569 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1570 | } |
1571 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1572 | } |
1573 | ||
a513088d | 1574 | static void |
56303d34 SE |
1575 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1576 | struct batadv_tt_global_entry *tt_global_entry, | |
1577 | struct batadv_orig_node *orig_node, | |
a513088d | 1578 | const char *message) |
db08e6e5 SW |
1579 | { |
1580 | struct hlist_head *head; | |
b67bfe0d | 1581 | struct hlist_node *safe; |
56303d34 | 1582 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1583 | unsigned short vid; |
db08e6e5 SW |
1584 | |
1585 | spin_lock_bh(&tt_global_entry->list_lock); | |
1586 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1587 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1588 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1589 | vid = tt_global_entry->common.vid; |
39c75a51 | 1590 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1591 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1592 | orig_node->orig, |
16052789 AQ |
1593 | tt_global_entry->common.addr, |
1594 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1595 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1596 | batadv_tt_global_size_dec(orig_node, |
1597 | tt_global_entry->common.vid); | |
a513088d | 1598 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1599 | } |
1600 | } | |
1601 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1602 | } | |
1603 | ||
db08e6e5 | 1604 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1605 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1606 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1607 | */ |
a513088d | 1608 | static void |
56303d34 SE |
1609 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1610 | struct batadv_tt_global_entry *tt_global_entry, | |
1611 | struct batadv_orig_node *orig_node, | |
1612 | const char *message) | |
db08e6e5 SW |
1613 | { |
1614 | bool last_entry = true; | |
1615 | struct hlist_head *head; | |
56303d34 | 1616 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1617 | |
1618 | /* no local entry exists, case 1: | |
1619 | * Check if this is the last one or if other entries exist. | |
1620 | */ | |
1621 | ||
1622 | rcu_read_lock(); | |
1623 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1624 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1625 | if (orig_entry->orig_node != orig_node) { |
1626 | last_entry = false; | |
1627 | break; | |
1628 | } | |
1629 | } | |
1630 | rcu_read_unlock(); | |
1631 | ||
1632 | if (last_entry) { | |
1633 | /* its the last one, mark for roaming. */ | |
acd34afa | 1634 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1635 | tt_global_entry->roam_at = jiffies; |
1636 | } else | |
1637 | /* there is another entry, we can simply delete this | |
1638 | * one and can still use the other one. | |
1639 | */ | |
a513088d SE |
1640 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1641 | orig_node, message); | |
db08e6e5 SW |
1642 | } |
1643 | ||
c018ad3d AQ |
1644 | /** |
1645 | * batadv_tt_global_del - remove a client from the global table | |
1646 | * @bat_priv: the bat priv with all the soft interface information | |
1647 | * @orig_node: an originator serving this client | |
1648 | * @addr: the mac address of the client | |
1649 | * @vid: VLAN identifier | |
1650 | * @message: a message explaining the reason for deleting the client to print | |
1651 | * for debugging purpose | |
1652 | * @roaming: true if the deletion has been triggered by a roaming event | |
1653 | */ | |
56303d34 SE |
1654 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1655 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1656 | const unsigned char *addr, unsigned short vid, |
a513088d | 1657 | const char *message, bool roaming) |
a73105b8 | 1658 | { |
170173bf | 1659 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1660 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1661 | |
c018ad3d | 1662 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1663 | if (!tt_global_entry) |
7683fdc1 | 1664 | goto out; |
a73105b8 | 1665 | |
db08e6e5 | 1666 | if (!roaming) { |
a513088d SE |
1667 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1668 | orig_node, message); | |
db08e6e5 SW |
1669 | |
1670 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1671 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1672 | message); | |
db08e6e5 SW |
1673 | |
1674 | goto out; | |
1675 | } | |
92f90f56 SE |
1676 | |
1677 | /* if we are deleting a global entry due to a roam | |
1678 | * event, there are two possibilities: | |
db08e6e5 SW |
1679 | * 1) the client roamed from node A to node B => if there |
1680 | * is only one originator left for this client, we mark | |
acd34afa | 1681 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1682 | * wait for node B to claim it. In case of timeout |
1683 | * the entry is purged. | |
db08e6e5 SW |
1684 | * |
1685 | * If there are other originators left, we directly delete | |
1686 | * the originator. | |
92f90f56 | 1687 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1688 | * the global entry, since it is useless now. |
1689 | */ | |
a513088d | 1690 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1691 | tt_global_entry->common.addr, |
1692 | vid); | |
a513088d | 1693 | if (local_entry) { |
db08e6e5 | 1694 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1695 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1696 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1697 | } else |
1698 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1699 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1700 | orig_node, message); | |
92f90f56 | 1701 | |
92f90f56 | 1702 | |
cc47f66e | 1703 | out: |
7683fdc1 | 1704 | if (tt_global_entry) |
a513088d SE |
1705 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1706 | if (local_entry) | |
1707 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1708 | } |
1709 | ||
95fb130d AQ |
1710 | /** |
1711 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1712 | * given originator matching the provided vid | |
1713 | * @bat_priv: the bat priv with all the soft interface information | |
1714 | * @orig_node: the originator owning the entries to remove | |
1715 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1716 | * removed | |
1717 | * @message: debug message to print as "reason" | |
1718 | */ | |
56303d34 SE |
1719 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1720 | struct batadv_orig_node *orig_node, | |
95fb130d | 1721 | int32_t match_vid, |
56303d34 | 1722 | const char *message) |
c6c8fea2 | 1723 | { |
56303d34 SE |
1724 | struct batadv_tt_global_entry *tt_global; |
1725 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1726 | uint32_t i; |
807736f6 | 1727 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1728 | struct hlist_node *safe; |
a73105b8 | 1729 | struct hlist_head *head; |
7683fdc1 | 1730 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1731 | unsigned short vid; |
c6c8fea2 | 1732 | |
6e801494 SW |
1733 | if (!hash) |
1734 | return; | |
1735 | ||
a73105b8 AQ |
1736 | for (i = 0; i < hash->size; i++) { |
1737 | head = &hash->table[i]; | |
7683fdc1 | 1738 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1739 | |
7683fdc1 | 1740 | spin_lock_bh(list_lock); |
b67bfe0d | 1741 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1742 | head, hash_entry) { |
95fb130d AQ |
1743 | /* remove only matching entries */ |
1744 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1745 | continue; | |
1746 | ||
56303d34 SE |
1747 | tt_global = container_of(tt_common_entry, |
1748 | struct batadv_tt_global_entry, | |
1749 | common); | |
db08e6e5 | 1750 | |
56303d34 | 1751 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1752 | orig_node, message); |
db08e6e5 | 1753 | |
56303d34 | 1754 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1755 | vid = tt_global->common.vid; |
39c75a51 | 1756 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1757 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1758 | tt_global->common.addr, | |
1759 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1760 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1761 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1762 | } |
a73105b8 | 1763 | } |
7683fdc1 | 1764 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1765 | } |
17071578 | 1766 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1767 | } |
1768 | ||
30cfd02b AQ |
1769 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1770 | char **msg) | |
cc47f66e | 1771 | { |
30cfd02b AQ |
1772 | bool purge = false; |
1773 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1774 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1775 | |
30cfd02b AQ |
1776 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1777 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1778 | purge = true; | |
1779 | *msg = "Roaming timeout\n"; | |
1780 | } | |
42d0b044 | 1781 | |
30cfd02b AQ |
1782 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1783 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1784 | purge = true; | |
1785 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1786 | } |
30cfd02b AQ |
1787 | |
1788 | return purge; | |
42d0b044 SE |
1789 | } |
1790 | ||
30cfd02b | 1791 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1792 | { |
807736f6 | 1793 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1794 | struct hlist_head *head; |
b67bfe0d | 1795 | struct hlist_node *node_tmp; |
7683fdc1 | 1796 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1797 | uint32_t i; |
30cfd02b AQ |
1798 | char *msg = NULL; |
1799 | struct batadv_tt_common_entry *tt_common; | |
1800 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1801 | |
cc47f66e AQ |
1802 | for (i = 0; i < hash->size; i++) { |
1803 | head = &hash->table[i]; | |
7683fdc1 | 1804 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1805 | |
7683fdc1 | 1806 | spin_lock_bh(list_lock); |
b67bfe0d | 1807 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1808 | hash_entry) { |
1809 | tt_global = container_of(tt_common, | |
1810 | struct batadv_tt_global_entry, | |
1811 | common); | |
1812 | ||
1813 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1814 | continue; | |
1815 | ||
1816 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1817 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1818 | tt_global->common.addr, | |
1819 | BATADV_PRINT_VID(tt_global->common.vid), | |
1820 | msg); | |
30cfd02b | 1821 | |
b67bfe0d | 1822 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1823 | |
1824 | batadv_tt_global_entry_free_ref(tt_global); | |
1825 | } | |
7683fdc1 | 1826 | spin_unlock_bh(list_lock); |
cc47f66e | 1827 | } |
cc47f66e AQ |
1828 | } |
1829 | ||
56303d34 | 1830 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1831 | { |
5bf74e9c | 1832 | struct batadv_hashtable *hash; |
7683fdc1 | 1833 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1834 | struct batadv_tt_common_entry *tt_common_entry; |
1835 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1836 | struct hlist_node *node_tmp; |
7683fdc1 | 1837 | struct hlist_head *head; |
c90681b8 | 1838 | uint32_t i; |
7683fdc1 | 1839 | |
807736f6 | 1840 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1841 | return; |
1842 | ||
807736f6 | 1843 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1844 | |
1845 | for (i = 0; i < hash->size; i++) { | |
1846 | head = &hash->table[i]; | |
1847 | list_lock = &hash->list_locks[i]; | |
1848 | ||
1849 | spin_lock_bh(list_lock); | |
b67bfe0d | 1850 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1851 | head, hash_entry) { |
b67bfe0d | 1852 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1853 | tt_global = container_of(tt_common_entry, |
1854 | struct batadv_tt_global_entry, | |
1855 | common); | |
1856 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1857 | } |
1858 | spin_unlock_bh(list_lock); | |
1859 | } | |
1860 | ||
1a8eaf07 | 1861 | batadv_hash_destroy(hash); |
7683fdc1 | 1862 | |
807736f6 | 1863 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1864 | } |
1865 | ||
56303d34 SE |
1866 | static bool |
1867 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1868 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1869 | { |
1870 | bool ret = false; | |
1871 | ||
acd34afa SE |
1872 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1873 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1874 | ret = true; |
1875 | ||
2d2fcc2a AQ |
1876 | /* check if the two clients are marked as isolated */ |
1877 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1878 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1879 | ret = true; | |
1880 | ||
59b699cd AQ |
1881 | return ret; |
1882 | } | |
1883 | ||
c018ad3d AQ |
1884 | /** |
1885 | * batadv_transtable_search - get the mesh destination for a given client | |
1886 | * @bat_priv: the bat priv with all the soft interface information | |
1887 | * @src: mac address of the source client | |
1888 | * @addr: mac address of the destination client | |
1889 | * @vid: VLAN identifier | |
1890 | * | |
1891 | * Returns a pointer to the originator that was selected as destination in the | |
1892 | * mesh for contacting the client 'addr', NULL otherwise. | |
1893 | * In case of multiple originators serving the same client, the function returns | |
1894 | * the best one (best in terms of metric towards the destination node). | |
1895 | * | |
1896 | * If the two clients are AP isolated the function returns NULL. | |
1897 | */ | |
56303d34 SE |
1898 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1899 | const uint8_t *src, | |
c018ad3d AQ |
1900 | const uint8_t *addr, |
1901 | unsigned short vid) | |
c6c8fea2 | 1902 | { |
56303d34 SE |
1903 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1904 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1905 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1906 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 1907 | |
eceb22ae | 1908 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 1909 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1910 | if (!tt_local_entry || |
1911 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1912 | goto out; |
1913 | } | |
7aadf889 | 1914 | |
c018ad3d | 1915 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1916 | if (!tt_global_entry) |
7b36e8ee | 1917 | goto out; |
7aadf889 | 1918 | |
3d393e47 | 1919 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1920 | * isolation |
1921 | */ | |
a513088d SE |
1922 | if (tt_local_entry && |
1923 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1924 | goto out; |
1925 | ||
db08e6e5 | 1926 | rcu_read_lock(); |
4627456a | 1927 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1928 | /* found anything? */ |
981d8900 SE |
1929 | if (best_entry) |
1930 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1931 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1932 | orig_node = NULL; | |
1933 | rcu_read_unlock(); | |
981d8900 | 1934 | |
7b36e8ee | 1935 | out: |
3d393e47 | 1936 | if (tt_global_entry) |
a513088d | 1937 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1938 | if (tt_local_entry) |
a513088d | 1939 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1940 | |
7b36e8ee | 1941 | return orig_node; |
c6c8fea2 | 1942 | } |
a73105b8 | 1943 | |
ced72933 AQ |
1944 | /** |
1945 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1946 | * to the given orig_node | |
1947 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1948 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1949 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1950 | * |
1951 | * This function computes the checksum for the global table corresponding to a | |
1952 | * specific originator. In particular, the checksum is computed as follows: For | |
1953 | * each client connected to the originator the CRC32C of the MAC address and the | |
1954 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1955 | * together. | |
1956 | * | |
1957 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1958 | * produce a unique hash of the table, but since the order which is used to feed | |
1959 | * the CRC32C function affects the result and since every node in the network | |
1960 | * probably sorts the clients differently, the hash function cannot be directly | |
1961 | * computed over the entire table. Hence the CRC32C is used only on | |
1962 | * the single client entry, while all the results are then xor'ed together | |
1963 | * because the XOR operation can combine them all while trying to reduce the | |
1964 | * noise as much as possible. | |
1965 | * | |
1966 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1967 | */ |
1968 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1969 | struct batadv_orig_node *orig_node, |
1970 | unsigned short vid) | |
a73105b8 | 1971 | { |
807736f6 | 1972 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1973 | struct batadv_tt_common_entry *tt_common; |
1974 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1975 | struct hlist_head *head; |
0ffa9e8d | 1976 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 1977 | uint8_t flags; |
a30e22ca | 1978 | __be16 tmp_vid; |
a73105b8 AQ |
1979 | |
1980 | for (i = 0; i < hash->size; i++) { | |
1981 | head = &hash->table[i]; | |
1982 | ||
1983 | rcu_read_lock(); | |
b67bfe0d | 1984 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1985 | tt_global = container_of(tt_common, |
1986 | struct batadv_tt_global_entry, | |
1987 | common); | |
7ea7b4a1 AQ |
1988 | /* compute the CRC only for entries belonging to the |
1989 | * VLAN identified by the vid passed as parameter | |
1990 | */ | |
1991 | if (tt_common->vid != vid) | |
1992 | continue; | |
1993 | ||
db08e6e5 SW |
1994 | /* Roaming clients are in the global table for |
1995 | * consistency only. They don't have to be | |
1996 | * taken into account while computing the | |
1997 | * global crc | |
1998 | */ | |
acd34afa | 1999 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2000 | continue; |
30cfd02b AQ |
2001 | /* Temporary clients have not been announced yet, so |
2002 | * they have to be skipped while computing the global | |
2003 | * crc | |
2004 | */ | |
2005 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2006 | continue; | |
db08e6e5 SW |
2007 | |
2008 | /* find out if this global entry is announced by this | |
2009 | * originator | |
2010 | */ | |
56303d34 | 2011 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2012 | orig_node)) |
db08e6e5 SW |
2013 | continue; |
2014 | ||
a30e22ca AQ |
2015 | /* use network order to read the VID: this ensures that |
2016 | * every node reads the bytes in the same order. | |
2017 | */ | |
2018 | tmp_vid = htons(tt_common->vid); | |
2019 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2020 | |
2021 | /* compute the CRC on flags that have to be kept in sync | |
2022 | * among nodes | |
2023 | */ | |
2024 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2025 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2026 | ||
0ffa9e8d | 2027 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2028 | } |
2029 | rcu_read_unlock(); | |
2030 | } | |
2031 | ||
ced72933 | 2032 | return crc; |
a73105b8 AQ |
2033 | } |
2034 | ||
ced72933 AQ |
2035 | /** |
2036 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2037 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2038 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2039 | * |
2040 | * For details about the computation, please refer to the documentation for | |
2041 | * batadv_tt_global_crc(). | |
2042 | * | |
2043 | * Returns the checksum of the local table | |
ced72933 | 2044 | */ |
7ea7b4a1 AQ |
2045 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2046 | unsigned short vid) | |
a73105b8 | 2047 | { |
807736f6 | 2048 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2049 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2050 | struct hlist_head *head; |
0ffa9e8d | 2051 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2052 | uint8_t flags; |
a30e22ca | 2053 | __be16 tmp_vid; |
a73105b8 AQ |
2054 | |
2055 | for (i = 0; i < hash->size; i++) { | |
2056 | head = &hash->table[i]; | |
2057 | ||
2058 | rcu_read_lock(); | |
b67bfe0d | 2059 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2060 | /* compute the CRC only for entries belonging to the |
2061 | * VLAN identified by vid | |
2062 | */ | |
2063 | if (tt_common->vid != vid) | |
2064 | continue; | |
2065 | ||
058d0e26 | 2066 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2067 | * account while computing the CRC |
2068 | */ | |
acd34afa | 2069 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2070 | continue; |
ced72933 | 2071 | |
a30e22ca AQ |
2072 | /* use network order to read the VID: this ensures that |
2073 | * every node reads the bytes in the same order. | |
2074 | */ | |
2075 | tmp_vid = htons(tt_common->vid); | |
2076 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2077 | |
2078 | /* compute the CRC on flags that have to be kept in sync | |
2079 | * among nodes | |
2080 | */ | |
2081 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2082 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2083 | ||
0ffa9e8d | 2084 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2085 | } |
a73105b8 AQ |
2086 | rcu_read_unlock(); |
2087 | } | |
2088 | ||
ced72933 | 2089 | return crc; |
a73105b8 AQ |
2090 | } |
2091 | ||
56303d34 | 2092 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2093 | { |
56303d34 | 2094 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2095 | |
807736f6 | 2096 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2097 | |
807736f6 | 2098 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2099 | list_del(&node->list); |
2100 | kfree(node); | |
2101 | } | |
2102 | ||
807736f6 | 2103 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2104 | } |
2105 | ||
56303d34 SE |
2106 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2107 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2108 | const void *tt_buff, |
2109 | uint16_t tt_buff_len) | |
a73105b8 | 2110 | { |
a73105b8 | 2111 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2112 | * last OGM (the OGM could carry no changes) |
2113 | */ | |
a73105b8 AQ |
2114 | spin_lock_bh(&orig_node->tt_buff_lock); |
2115 | if (tt_buff_len > 0) { | |
2116 | kfree(orig_node->tt_buff); | |
2117 | orig_node->tt_buff_len = 0; | |
2118 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2119 | if (orig_node->tt_buff) { | |
2120 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2121 | orig_node->tt_buff_len = tt_buff_len; | |
2122 | } | |
2123 | } | |
2124 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2125 | } | |
2126 | ||
56303d34 | 2127 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2128 | { |
56303d34 | 2129 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2130 | |
807736f6 SE |
2131 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2132 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2133 | if (batadv_has_timed_out(node->issued_at, |
2134 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2135 | list_del(&node->list); |
2136 | kfree(node); | |
2137 | } | |
2138 | } | |
807736f6 | 2139 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2140 | } |
2141 | ||
2142 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2143 | * has already been issued for this orig_node, NULL otherwise |
2144 | */ | |
56303d34 SE |
2145 | static struct batadv_tt_req_node * |
2146 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2147 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2148 | { |
56303d34 | 2149 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2150 | |
807736f6 SE |
2151 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2152 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2153 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2154 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2155 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2156 | goto unlock; |
2157 | } | |
2158 | ||
2159 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2160 | if (!tt_req_node) | |
2161 | goto unlock; | |
2162 | ||
8fdd0153 | 2163 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2164 | tt_req_node->issued_at = jiffies; |
2165 | ||
807736f6 | 2166 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2167 | unlock: |
807736f6 | 2168 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2169 | return tt_req_node; |
2170 | } | |
2171 | ||
335fbe0f ML |
2172 | /** |
2173 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2174 | * @entry_ptr: to be checked local tt entry | |
2175 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2176 | * | |
2177 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2178 | */ | |
2179 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2180 | { |
56303d34 | 2181 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2182 | |
acd34afa | 2183 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2184 | return 0; |
2185 | return 1; | |
2186 | } | |
2187 | ||
a513088d SE |
2188 | static int batadv_tt_global_valid(const void *entry_ptr, |
2189 | const void *data_ptr) | |
a73105b8 | 2190 | { |
56303d34 SE |
2191 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2192 | const struct batadv_tt_global_entry *tt_global_entry; | |
2193 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2194 | |
30cfd02b AQ |
2195 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2196 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2197 | return 0; |
2198 | ||
56303d34 SE |
2199 | tt_global_entry = container_of(tt_common_entry, |
2200 | struct batadv_tt_global_entry, | |
48100bac AQ |
2201 | common); |
2202 | ||
a513088d | 2203 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2204 | } |
2205 | ||
335fbe0f | 2206 | /** |
7ea7b4a1 AQ |
2207 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2208 | * specified tt hash | |
335fbe0f ML |
2209 | * @bat_priv: the bat priv with all the soft interface information |
2210 | * @hash: hash table containing the tt entries | |
2211 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2212 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2213 | * @valid_cb: function to filter tt change entries |
2214 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2215 | */ |
7ea7b4a1 AQ |
2216 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2217 | struct batadv_hashtable *hash, | |
2218 | void *tvlv_buff, uint16_t tt_len, | |
2219 | int (*valid_cb)(const void *, const void *), | |
2220 | void *cb_data) | |
a73105b8 | 2221 | { |
56303d34 | 2222 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2223 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2224 | struct hlist_head *head; |
335fbe0f | 2225 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2226 | uint32_t i; |
a73105b8 | 2227 | |
298e6e68 | 2228 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2229 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2230 | |
2231 | rcu_read_lock(); | |
2232 | for (i = 0; i < hash->size; i++) { | |
2233 | head = &hash->table[i]; | |
2234 | ||
b67bfe0d | 2235 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2236 | head, hash_entry) { |
335fbe0f | 2237 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2238 | break; |
2239 | ||
48100bac | 2240 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2241 | continue; |
2242 | ||
8fdd0153 | 2243 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2244 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2245 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2246 | memset(tt_change->reserved, 0, |
2247 | sizeof(tt_change->reserved)); | |
a73105b8 | 2248 | |
335fbe0f | 2249 | tt_num_entries++; |
a73105b8 AQ |
2250 | tt_change++; |
2251 | } | |
2252 | } | |
2253 | rcu_read_unlock(); | |
7ea7b4a1 | 2254 | } |
a73105b8 | 2255 | |
7ea7b4a1 AQ |
2256 | /** |
2257 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2258 | * @orig_node: originator for which the CRCs have to be checked | |
2259 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2260 | * @num_vlan: number of tvlv VLAN entries | |
2261 | * @create: if true, create VLAN objects if not found | |
2262 | * | |
2263 | * Return true if all the received CRCs match the locally stored ones, false | |
2264 | * otherwise | |
2265 | */ | |
2266 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2267 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2268 | uint16_t num_vlan) | |
2269 | { | |
2270 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2271 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2272 | uint32_t crc; |
7ea7b4a1 AQ |
2273 | int i; |
2274 | ||
2275 | /* check if each received CRC matches the locally stored one */ | |
2276 | for (i = 0; i < num_vlan; i++) { | |
2277 | tt_vlan_tmp = tt_vlan + i; | |
2278 | ||
2279 | /* if orig_node is a backbone node for this VLAN, don't check | |
2280 | * the CRC as we ignore all the global entries over it | |
2281 | */ | |
2282 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2283 | orig_node->orig, |
2284 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2285 | continue; |
2286 | ||
2287 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2288 | ntohs(tt_vlan_tmp->vid)); | |
2289 | if (!vlan) | |
2290 | return false; | |
2291 | ||
91c2b1a9 AQ |
2292 | crc = vlan->tt.crc; |
2293 | batadv_orig_node_vlan_free_ref(vlan); | |
2294 | ||
2295 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2296 | return false; |
2297 | } | |
2298 | ||
2299 | return true; | |
2300 | } | |
2301 | ||
2302 | /** | |
2303 | * batadv_tt_local_update_crc - update all the local CRCs | |
2304 | * @bat_priv: the bat priv with all the soft interface information | |
2305 | */ | |
2306 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2307 | { | |
2308 | struct batadv_softif_vlan *vlan; | |
2309 | ||
2310 | /* recompute the global CRC for each VLAN */ | |
2311 | rcu_read_lock(); | |
2312 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2313 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2314 | } | |
2315 | rcu_read_unlock(); | |
2316 | } | |
2317 | ||
2318 | /** | |
2319 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2320 | * @bat_priv: the bat priv with all the soft interface information | |
2321 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2322 | */ | |
2323 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2324 | struct batadv_orig_node *orig_node) | |
2325 | { | |
2326 | struct batadv_orig_node_vlan *vlan; | |
2327 | uint32_t crc; | |
2328 | ||
2329 | /* recompute the global CRC for each VLAN */ | |
2330 | rcu_read_lock(); | |
2331 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2332 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2333 | * the CRC as we ignore all the global entries over it | |
2334 | */ | |
cfd4f757 AQ |
2335 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2336 | vlan->vid)) | |
7ea7b4a1 AQ |
2337 | continue; |
2338 | ||
2339 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2340 | vlan->tt.crc = crc; | |
2341 | } | |
2342 | rcu_read_unlock(); | |
a73105b8 AQ |
2343 | } |
2344 | ||
ced72933 AQ |
2345 | /** |
2346 | * batadv_send_tt_request - send a TT Request message to a given node | |
2347 | * @bat_priv: the bat priv with all the soft interface information | |
2348 | * @dst_orig_node: the destination of the message | |
2349 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2350 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2351 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2352 | * @full_table: ask for the entire translation table if true, while only for the |
2353 | * last TT diff otherwise | |
2354 | */ | |
56303d34 SE |
2355 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2356 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2357 | uint8_t ttvn, |
2358 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2359 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2360 | { |
335fbe0f | 2361 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2362 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2363 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2364 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2365 | bool ret = false; |
7ea7b4a1 | 2366 | int i, size; |
a73105b8 | 2367 | |
e5d89254 | 2368 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2369 | if (!primary_if) |
2370 | goto out; | |
2371 | ||
2372 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2373 | * reply from the same orig_node yet |
2374 | */ | |
a513088d | 2375 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2376 | if (!tt_req_node) |
2377 | goto out; | |
2378 | ||
7ea7b4a1 AQ |
2379 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2380 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2381 | if (!tvlv_tt_data) |
a73105b8 AQ |
2382 | goto out; |
2383 | ||
335fbe0f ML |
2384 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2385 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2386 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2387 | ||
2388 | /* send all the CRCs within the request. This is needed by intermediate | |
2389 | * nodes to ensure they have the correct table before replying | |
2390 | */ | |
2391 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2392 | for (i = 0; i < num_vlan; i++) { | |
2393 | tt_vlan_req->vid = tt_vlan->vid; | |
2394 | tt_vlan_req->crc = tt_vlan->crc; | |
2395 | ||
2396 | tt_vlan_req++; | |
2397 | tt_vlan++; | |
2398 | } | |
a73105b8 AQ |
2399 | |
2400 | if (full_table) | |
335fbe0f | 2401 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2402 | |
bb351ba0 | 2403 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2404 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2405 | |
d69909d2 | 2406 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2407 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2408 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2409 | tvlv_tt_data, size); |
335fbe0f | 2410 | ret = true; |
a73105b8 AQ |
2411 | |
2412 | out: | |
a73105b8 | 2413 | if (primary_if) |
e5d89254 | 2414 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2415 | if (ret && tt_req_node) { |
807736f6 | 2416 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2417 | list_del(&tt_req_node->list); |
807736f6 | 2418 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2419 | kfree(tt_req_node); |
2420 | } | |
335fbe0f | 2421 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2422 | return ret; |
2423 | } | |
2424 | ||
335fbe0f ML |
2425 | /** |
2426 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2427 | * node's translation table | |
2428 | * @bat_priv: the bat priv with all the soft interface information | |
2429 | * @tt_data: tt data containing the tt request information | |
2430 | * @req_src: mac address of tt request sender | |
2431 | * @req_dst: mac address of tt request recipient | |
2432 | * | |
2433 | * Returns true if tt request reply was sent, false otherwise. | |
2434 | */ | |
2435 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2436 | struct batadv_tvlv_tt_data *tt_data, | |
2437 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2438 | { |
170173bf | 2439 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2440 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2441 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2442 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2443 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2444 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2445 | uint8_t orig_ttvn, req_ttvn; |
2446 | uint16_t tvlv_len; | |
2447 | int32_t tt_len; | |
a73105b8 | 2448 | |
39c75a51 | 2449 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2450 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2451 | req_src, tt_data->ttvn, req_dst, |
2452 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2453 | |
2454 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2455 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2456 | if (!req_dst_orig_node) |
2457 | goto out; | |
2458 | ||
335fbe0f | 2459 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2460 | if (!res_dst_orig_node) |
2461 | goto out; | |
2462 | ||
a73105b8 | 2463 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2464 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2465 | |
7ea7b4a1 | 2466 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2467 | /* this node doesn't have the requested data */ |
a73105b8 | 2468 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2469 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2470 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2471 | goto out; |
2472 | ||
015758d0 | 2473 | /* If the full table has been explicitly requested */ |
335fbe0f | 2474 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2475 | !req_dst_orig_node->tt_buff) |
2476 | full_table = true; | |
2477 | else | |
2478 | full_table = false; | |
2479 | ||
335fbe0f ML |
2480 | /* TT fragmentation hasn't been implemented yet, so send as many |
2481 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2482 | */ |
a73105b8 AQ |
2483 | if (!full_table) { |
2484 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2485 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2486 | |
7ea7b4a1 AQ |
2487 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2488 | &tvlv_tt_data, | |
2489 | &tt_change, | |
2490 | &tt_len); | |
2491 | if (!tt_len) | |
a73105b8 AQ |
2492 | goto unlock; |
2493 | ||
a73105b8 | 2494 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2495 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2496 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2497 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2498 | } else { | |
7ea7b4a1 AQ |
2499 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2500 | * in the initial part | |
2501 | */ | |
2502 | tt_len = -1; | |
2503 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2504 | &tvlv_tt_data, | |
2505 | &tt_change, | |
2506 | &tt_len); | |
2507 | if (!tt_len) | |
a73105b8 | 2508 | goto out; |
7ea7b4a1 AQ |
2509 | |
2510 | /* fill the rest of the tvlv with the real TT entries */ | |
2511 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2512 | tt_change, tt_len, | |
2513 | batadv_tt_global_valid, | |
2514 | req_dst_orig_node); | |
a73105b8 AQ |
2515 | } |
2516 | ||
a19d3d85 ML |
2517 | /* Don't send the response, if larger than fragmented packet. */ |
2518 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2519 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2520 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2521 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2522 | res_dst_orig_node->orig); | |
2523 | goto out; | |
2524 | } | |
2525 | ||
335fbe0f ML |
2526 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2527 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2528 | |
2529 | if (full_table) | |
335fbe0f | 2530 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2531 | |
39c75a51 | 2532 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2533 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2534 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2535 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2536 | |
d69909d2 | 2537 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2538 | |
335fbe0f | 2539 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2540 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2541 | tvlv_len); | |
e91ecfc6 | 2542 | |
335fbe0f | 2543 | ret = true; |
a73105b8 AQ |
2544 | goto out; |
2545 | ||
2546 | unlock: | |
2547 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2548 | ||
2549 | out: | |
2550 | if (res_dst_orig_node) | |
7d211efc | 2551 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2552 | if (req_dst_orig_node) |
7d211efc | 2553 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2554 | kfree(tvlv_tt_data); |
a73105b8 | 2555 | return ret; |
a73105b8 | 2556 | } |
96412690 | 2557 | |
335fbe0f ML |
2558 | /** |
2559 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2560 | * translation table | |
2561 | * @bat_priv: the bat priv with all the soft interface information | |
2562 | * @tt_data: tt data containing the tt request information | |
2563 | * @req_src: mac address of tt request sender | |
2564 | * | |
2565 | * Returns true if tt request reply was sent, false otherwise. | |
2566 | */ | |
2567 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2568 | struct batadv_tvlv_tt_data *tt_data, | |
2569 | uint8_t *req_src) | |
a73105b8 | 2570 | { |
335fbe0f | 2571 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2572 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2573 | struct batadv_tvlv_tt_change *tt_change; |
2574 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2575 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2576 | uint16_t tvlv_len; |
a73105b8 | 2577 | bool full_table; |
7ea7b4a1 | 2578 | int32_t tt_len; |
a73105b8 | 2579 | |
39c75a51 | 2580 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2581 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2582 | req_src, tt_data->ttvn, |
2583 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2584 | |
a70a9aa9 | 2585 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2586 | |
807736f6 | 2587 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2588 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2589 | |
335fbe0f | 2590 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2591 | if (!orig_node) |
2592 | goto out; | |
2593 | ||
e5d89254 | 2594 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2595 | if (!primary_if) |
2596 | goto out; | |
2597 | ||
2598 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2599 | * is too big send the whole local translation table |
2600 | */ | |
335fbe0f | 2601 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2602 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2603 | full_table = true; |
2604 | else | |
2605 | full_table = false; | |
2606 | ||
335fbe0f ML |
2607 | /* TT fragmentation hasn't been implemented yet, so send as many |
2608 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2609 | */ |
a73105b8 | 2610 | if (!full_table) { |
807736f6 | 2611 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2612 | |
7ea7b4a1 AQ |
2613 | tt_len = bat_priv->tt.last_changeset_len; |
2614 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2615 | &tvlv_tt_data, | |
2616 | &tt_change, | |
2617 | &tt_len); | |
2618 | if (!tt_len) | |
a73105b8 AQ |
2619 | goto unlock; |
2620 | ||
335fbe0f | 2621 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2622 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2623 | bat_priv->tt.last_changeset_len); |
2624 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2625 | } else { |
335fbe0f ML |
2626 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2627 | ||
7ea7b4a1 AQ |
2628 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2629 | * in the initial part | |
2630 | */ | |
2631 | tt_len = -1; | |
2632 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2633 | &tvlv_tt_data, | |
2634 | &tt_change, | |
2635 | &tt_len); | |
2636 | if (!tt_len) | |
a73105b8 | 2637 | goto out; |
7ea7b4a1 AQ |
2638 | |
2639 | /* fill the rest of the tvlv with the real TT entries */ | |
2640 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2641 | tt_change, tt_len, | |
2642 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2643 | } |
2644 | ||
335fbe0f ML |
2645 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2646 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2647 | |
2648 | if (full_table) | |
335fbe0f | 2649 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2650 | |
39c75a51 | 2651 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2652 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2653 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2654 | |
d69909d2 | 2655 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2656 | |
335fbe0f | 2657 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2658 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2659 | tvlv_len); | |
335fbe0f | 2660 | |
a73105b8 AQ |
2661 | goto out; |
2662 | ||
2663 | unlock: | |
807736f6 | 2664 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2665 | out: |
a70a9aa9 | 2666 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2667 | if (orig_node) |
7d211efc | 2668 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2669 | if (primary_if) |
e5d89254 | 2670 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2671 | kfree(tvlv_tt_data); |
2672 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2673 | return true; |
2674 | } | |
2675 | ||
335fbe0f ML |
2676 | /** |
2677 | * batadv_send_tt_response - send reply to tt request | |
2678 | * @bat_priv: the bat priv with all the soft interface information | |
2679 | * @tt_data: tt data containing the tt request information | |
2680 | * @req_src: mac address of tt request sender | |
2681 | * @req_dst: mac address of tt request recipient | |
2682 | * | |
2683 | * Returns true if tt request reply was sent, false otherwise. | |
2684 | */ | |
2685 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2686 | struct batadv_tvlv_tt_data *tt_data, | |
2687 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2688 | { |
cfd4f757 | 2689 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2690 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2691 | else |
335fbe0f ML |
2692 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2693 | req_src, req_dst); | |
a73105b8 AQ |
2694 | } |
2695 | ||
56303d34 SE |
2696 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2697 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2698 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2699 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2700 | { |
2701 | int i; | |
a513088d | 2702 | int roams; |
a73105b8 AQ |
2703 | |
2704 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2705 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2706 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2707 | batadv_tt_global_del(bat_priv, orig_node, |
2708 | (tt_change + i)->addr, | |
c018ad3d | 2709 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2710 | "tt removed by changes", |
2711 | roams); | |
08c36d3e | 2712 | } else { |
08c36d3e | 2713 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2714 | (tt_change + i)->addr, |
c018ad3d | 2715 | ntohs((tt_change + i)->vid), |
d4f44692 | 2716 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2717 | /* In case of problem while storing a |
2718 | * global_entry, we stop the updating | |
2719 | * procedure without committing the | |
2720 | * ttvn change. This will avoid to send | |
2721 | * corrupted data on tt_request | |
2722 | */ | |
2723 | return; | |
08c36d3e | 2724 | } |
a73105b8 | 2725 | } |
17071578 | 2726 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2727 | } |
2728 | ||
56303d34 | 2729 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2730 | struct batadv_tvlv_tt_change *tt_change, |
2731 | uint8_t ttvn, uint8_t *resp_src, | |
2732 | uint16_t num_entries) | |
a73105b8 | 2733 | { |
170173bf | 2734 | struct batadv_orig_node *orig_node; |
a73105b8 | 2735 | |
335fbe0f | 2736 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2737 | if (!orig_node) |
2738 | goto out; | |
2739 | ||
2740 | /* Purge the old table first.. */ | |
95fb130d AQ |
2741 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2742 | "Received full table"); | |
a73105b8 | 2743 | |
7ea7b4a1 AQ |
2744 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2745 | ttvn); | |
a73105b8 AQ |
2746 | |
2747 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2748 | kfree(orig_node->tt_buff); | |
2749 | orig_node->tt_buff_len = 0; | |
2750 | orig_node->tt_buff = NULL; | |
2751 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2752 | ||
7ea7b4a1 | 2753 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2754 | |
2755 | out: | |
2756 | if (orig_node) | |
7d211efc | 2757 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2758 | } |
2759 | ||
56303d34 SE |
2760 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2761 | struct batadv_orig_node *orig_node, | |
a513088d | 2762 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2763 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2764 | { |
a513088d SE |
2765 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2766 | tt_num_changes, ttvn); | |
a73105b8 | 2767 | |
e8cf234a AQ |
2768 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2769 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2770 | atomic_set(&orig_node->last_ttvn, ttvn); |
2771 | } | |
2772 | ||
c018ad3d AQ |
2773 | /** |
2774 | * batadv_is_my_client - check if a client is served by the local node | |
2775 | * @bat_priv: the bat priv with all the soft interface information | |
2776 | * @addr: the mac adress of the client to check | |
2777 | * @vid: VLAN identifier | |
2778 | * | |
2779 | * Returns true if the client is served by this node, false otherwise. | |
2780 | */ | |
2781 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2782 | unsigned short vid) | |
a73105b8 | 2783 | { |
170173bf | 2784 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2785 | bool ret = false; |
a73105b8 | 2786 | |
c018ad3d | 2787 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2788 | if (!tt_local_entry) |
2789 | goto out; | |
058d0e26 | 2790 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2791 | * consistency purpose) |
2792 | */ | |
7c1fd91d AQ |
2793 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2794 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2795 | goto out; |
7683fdc1 AQ |
2796 | ret = true; |
2797 | out: | |
a73105b8 | 2798 | if (tt_local_entry) |
a513088d | 2799 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2800 | return ret; |
a73105b8 AQ |
2801 | } |
2802 | ||
335fbe0f ML |
2803 | /** |
2804 | * batadv_handle_tt_response - process incoming tt reply | |
2805 | * @bat_priv: the bat priv with all the soft interface information | |
2806 | * @tt_data: tt data containing the tt request information | |
2807 | * @resp_src: mac address of tt reply sender | |
2808 | * @num_entries: number of tt change entries appended to the tt data | |
2809 | */ | |
2810 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2811 | struct batadv_tvlv_tt_data *tt_data, | |
2812 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2813 | { |
56303d34 SE |
2814 | struct batadv_tt_req_node *node, *safe; |
2815 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2816 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2817 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2818 | uint16_t change_offset; | |
a73105b8 | 2819 | |
39c75a51 | 2820 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2821 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2822 | resp_src, tt_data->ttvn, num_entries, |
2823 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2824 | |
335fbe0f | 2825 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2826 | if (!orig_node) |
2827 | goto out; | |
2828 | ||
a70a9aa9 AQ |
2829 | spin_lock_bh(&orig_node->tt_lock); |
2830 | ||
7ea7b4a1 AQ |
2831 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2832 | change_offset *= ntohs(tt_data->num_vlan); | |
2833 | change_offset += sizeof(*tt_data); | |
2834 | tvlv_ptr += change_offset; | |
2835 | ||
2836 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2837 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2838 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2839 | resp_src, num_entries); | |
96412690 | 2840 | } else { |
335fbe0f ML |
2841 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2842 | tt_data->ttvn, tt_change); | |
96412690 | 2843 | } |
a73105b8 | 2844 | |
a70a9aa9 | 2845 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2846 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2847 | |
2848 | spin_unlock_bh(&orig_node->tt_lock); | |
2849 | ||
a73105b8 | 2850 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2851 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2852 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2853 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2854 | continue; |
2855 | list_del(&node->list); | |
2856 | kfree(node); | |
2857 | } | |
7ea7b4a1 | 2858 | |
807736f6 | 2859 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2860 | out: |
2861 | if (orig_node) | |
7d211efc | 2862 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2863 | } |
2864 | ||
56303d34 | 2865 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2866 | { |
56303d34 | 2867 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2868 | |
807736f6 | 2869 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2870 | |
807736f6 | 2871 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2872 | list_del(&node->list); |
2873 | kfree(node); | |
2874 | } | |
2875 | ||
807736f6 | 2876 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2877 | } |
2878 | ||
56303d34 | 2879 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2880 | { |
56303d34 | 2881 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2882 | |
807736f6 SE |
2883 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2884 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2885 | if (!batadv_has_timed_out(node->first_time, |
2886 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2887 | continue; |
2888 | ||
2889 | list_del(&node->list); | |
2890 | kfree(node); | |
2891 | } | |
807736f6 | 2892 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2893 | } |
2894 | ||
2895 | /* This function checks whether the client already reached the | |
2896 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2897 | * will not be sent. | |
2898 | * | |
9cfc7bd6 SE |
2899 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2900 | */ | |
56303d34 | 2901 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2902 | uint8_t *client) |
cc47f66e | 2903 | { |
56303d34 | 2904 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2905 | bool ret = false; |
2906 | ||
807736f6 | 2907 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2908 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2909 | * reply from the same orig_node yet |
2910 | */ | |
807736f6 | 2911 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2912 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2913 | continue; |
2914 | ||
1eda58bf | 2915 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2916 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2917 | continue; |
2918 | ||
3e34819e | 2919 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2920 | /* Sorry, you roamed too many times! */ |
2921 | goto unlock; | |
2922 | ret = true; | |
2923 | break; | |
2924 | } | |
2925 | ||
2926 | if (!ret) { | |
2927 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2928 | if (!tt_roam_node) | |
2929 | goto unlock; | |
2930 | ||
2931 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2932 | atomic_set(&tt_roam_node->counter, |
2933 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 2934 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 2935 | |
807736f6 | 2936 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2937 | ret = true; |
2938 | } | |
2939 | ||
2940 | unlock: | |
807736f6 | 2941 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2942 | return ret; |
2943 | } | |
2944 | ||
c018ad3d AQ |
2945 | /** |
2946 | * batadv_send_roam_adv - send a roaming advertisement message | |
2947 | * @bat_priv: the bat priv with all the soft interface information | |
2948 | * @client: mac address of the roaming client | |
2949 | * @vid: VLAN identifier | |
2950 | * @orig_node: message destination | |
2951 | * | |
2952 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2953 | * client. This is done to inform the node that from now on all traffic destined | |
2954 | * for this particular roamed client has to be forwarded to the sender of the | |
2955 | * roaming message. | |
2956 | */ | |
56303d34 | 2957 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2958 | unsigned short vid, |
56303d34 | 2959 | struct batadv_orig_node *orig_node) |
cc47f66e | 2960 | { |
56303d34 | 2961 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2962 | struct batadv_tvlv_roam_adv tvlv_roam; |
2963 | ||
2964 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2965 | if (!primary_if) | |
2966 | goto out; | |
cc47f66e AQ |
2967 | |
2968 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2969 | * already roamed to us too many times |
2970 | */ | |
a513088d | 2971 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2972 | goto out; |
2973 | ||
39c75a51 | 2974 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2975 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2976 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2977 | |
d69909d2 | 2978 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2979 | |
122edaa0 | 2980 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2981 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2982 | |
2983 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2984 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2985 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2986 | |
2987 | out: | |
122edaa0 ML |
2988 | if (primary_if) |
2989 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2990 | } |
2991 | ||
a513088d | 2992 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2993 | { |
56303d34 | 2994 | struct delayed_work *delayed_work; |
807736f6 | 2995 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2996 | struct batadv_priv *bat_priv; |
2997 | ||
2998 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2999 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3000 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3001 | |
a19d3d85 | 3002 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3003 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3004 | batadv_tt_req_purge(bat_priv); |
3005 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3006 | |
72414442 AQ |
3007 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3008 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3009 | } |
cc47f66e | 3010 | |
56303d34 | 3011 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3012 | { |
e1bf0c14 ML |
3013 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3014 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3015 | ||
807736f6 | 3016 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3017 | |
a513088d SE |
3018 | batadv_tt_local_table_free(bat_priv); |
3019 | batadv_tt_global_table_free(bat_priv); | |
3020 | batadv_tt_req_list_free(bat_priv); | |
3021 | batadv_tt_changes_list_free(bat_priv); | |
3022 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3023 | |
807736f6 | 3024 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3025 | } |
058d0e26 | 3026 | |
7ea7b4a1 AQ |
3027 | /** |
3028 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3029 | * table and possibly count them in the TT size | |
3030 | * @bat_priv: the bat priv with all the soft interface information | |
3031 | * @flags: the flag to switch | |
3032 | * @enable: whether to set or unset the flag | |
3033 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3034 | */ |
7ea7b4a1 AQ |
3035 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3036 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3037 | { |
7ea7b4a1 AQ |
3038 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3039 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3040 | uint16_t changed_num = 0; |
058d0e26 | 3041 | struct hlist_head *head; |
7ea7b4a1 | 3042 | uint32_t i; |
058d0e26 AQ |
3043 | |
3044 | if (!hash) | |
7ea7b4a1 | 3045 | return; |
058d0e26 AQ |
3046 | |
3047 | for (i = 0; i < hash->size; i++) { | |
3048 | head = &hash->table[i]; | |
3049 | ||
3050 | rcu_read_lock(); | |
b67bfe0d | 3051 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3052 | head, hash_entry) { |
697f2531 AQ |
3053 | if (enable) { |
3054 | if ((tt_common_entry->flags & flags) == flags) | |
3055 | continue; | |
3056 | tt_common_entry->flags |= flags; | |
3057 | } else { | |
3058 | if (!(tt_common_entry->flags & flags)) | |
3059 | continue; | |
3060 | tt_common_entry->flags &= ~flags; | |
3061 | } | |
3062 | changed_num++; | |
7ea7b4a1 AQ |
3063 | |
3064 | if (!count) | |
3065 | continue; | |
3066 | ||
3067 | batadv_tt_local_size_inc(bat_priv, | |
3068 | tt_common_entry->vid); | |
058d0e26 AQ |
3069 | } |
3070 | rcu_read_unlock(); | |
3071 | } | |
058d0e26 AQ |
3072 | } |
3073 | ||
acd34afa | 3074 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3075 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3076 | { |
807736f6 | 3077 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3078 | struct batadv_tt_common_entry *tt_common; |
3079 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3080 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3081 | struct hlist_head *head; |
3082 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3083 | uint32_t i; |
058d0e26 AQ |
3084 | |
3085 | if (!hash) | |
3086 | return; | |
3087 | ||
3088 | for (i = 0; i < hash->size; i++) { | |
3089 | head = &hash->table[i]; | |
3090 | list_lock = &hash->list_locks[i]; | |
3091 | ||
3092 | spin_lock_bh(list_lock); | |
b67bfe0d | 3093 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3094 | hash_entry) { |
3095 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3096 | continue; |
3097 | ||
39c75a51 | 3098 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3099 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3100 | tt_common->addr, | |
3101 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3102 | |
7ea7b4a1 | 3103 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3104 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3105 | tt_local = container_of(tt_common, |
3106 | struct batadv_tt_local_entry, | |
3107 | common); | |
3108 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
3109 | } |
3110 | spin_unlock_bh(list_lock); | |
3111 | } | |
058d0e26 AQ |
3112 | } |
3113 | ||
e1bf0c14 | 3114 | /** |
a19d3d85 ML |
3115 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3116 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3117 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3118 | * |
3119 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3120 | */ |
a19d3d85 | 3121 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3122 | { |
e1bf0c14 ML |
3123 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3124 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3125 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3126 | return; |
e1bf0c14 | 3127 | } |
be9aa4c1 | 3128 | |
7ea7b4a1 | 3129 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3130 | |
a513088d | 3131 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3132 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3133 | |
3134 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3135 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3136 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3137 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3138 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3139 | |
3140 | /* reset the sending counter */ | |
807736f6 | 3141 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3142 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3143 | } |
a70a9aa9 | 3144 | |
a19d3d85 ML |
3145 | /** |
3146 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3147 | * have been queued in the time since the last commit | |
3148 | * @bat_priv: the bat priv with all the soft interface information | |
3149 | */ | |
3150 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3151 | { | |
3152 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3153 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3154 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3155 | } |
59b699cd | 3156 | |
56303d34 | 3157 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3158 | uint8_t *dst, unsigned short vid) |
59b699cd | 3159 | { |
56303d34 SE |
3160 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3161 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3162 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3163 | bool ret = false; |
59b699cd | 3164 | |
b8cbd81d AQ |
3165 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3166 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3167 | goto out; |
59b699cd | 3168 | |
b8cbd81d | 3169 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3170 | if (!tt_local_entry) |
3171 | goto out; | |
3172 | ||
b8cbd81d | 3173 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3174 | if (!tt_global_entry) |
3175 | goto out; | |
3176 | ||
1f129fef | 3177 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3178 | goto out; |
3179 | ||
5870adc6 | 3180 | ret = true; |
59b699cd AQ |
3181 | |
3182 | out: | |
b8cbd81d AQ |
3183 | if (vlan) |
3184 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3185 | if (tt_global_entry) |
a513088d | 3186 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3187 | if (tt_local_entry) |
a513088d | 3188 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3189 | return ret; |
3190 | } | |
a943cac1 | 3191 | |
e1bf0c14 ML |
3192 | /** |
3193 | * batadv_tt_update_orig - update global translation table with new tt | |
3194 | * information received via ogms | |
3195 | * @bat_priv: the bat priv with all the soft interface information | |
3196 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3197 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3198 | * @tt_num_vlan: number of tvlv VLAN entries | |
3199 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3200 | * @tt_num_changes: number of tt changes inside the tt buffer |
3201 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3202 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3203 | */ |
3204 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3205 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3206 | const void *tt_buff, uint16_t tt_num_vlan, |
3207 | struct batadv_tvlv_tt_change *tt_change, | |
3208 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3209 | { |
3210 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3211 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 ML |
3212 | bool full_table = true; |
3213 | ||
7ea7b4a1 | 3214 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
17071578 | 3215 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3216 | * increased by one -> we can apply the attached changes |
3217 | */ | |
17071578 AQ |
3218 | if ((!orig_node->tt_initialised && ttvn == 1) || |
3219 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 3220 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3221 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3222 | * times. | |
9cfc7bd6 SE |
3223 | * In this case send a tt request |
3224 | */ | |
a943cac1 ML |
3225 | if (!tt_num_changes) { |
3226 | full_table = false; | |
3227 | goto request_table; | |
3228 | } | |
3229 | ||
a70a9aa9 AQ |
3230 | spin_lock_bh(&orig_node->tt_lock); |
3231 | ||
a513088d | 3232 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3233 | ttvn, tt_change); |
a943cac1 ML |
3234 | |
3235 | /* Even if we received the precomputed crc with the OGM, we | |
3236 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3237 | * in the global table |
3238 | */ | |
7ea7b4a1 | 3239 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3240 | |
a70a9aa9 AQ |
3241 | spin_unlock_bh(&orig_node->tt_lock); |
3242 | ||
a943cac1 ML |
3243 | /* The ttvn alone is not enough to guarantee consistency |
3244 | * because a single value could represent different states | |
3245 | * (due to the wrap around). Thus a node has to check whether | |
3246 | * the resulting table (after applying the changes) is still | |
3247 | * consistent or not. E.g. a node could disconnect while its | |
3248 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3249 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3250 | * inconsistency |
3251 | */ | |
7ea7b4a1 AQ |
3252 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3253 | tt_num_vlan)) | |
a943cac1 | 3254 | goto request_table; |
a943cac1 ML |
3255 | } else { |
3256 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3257 | * in sync anymore -> request fresh tt data |
3258 | */ | |
17071578 | 3259 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3260 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3261 | tt_num_vlan)) { | |
a943cac1 | 3262 | request_table: |
39c75a51 | 3263 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3264 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3265 | orig_node->orig, ttvn, orig_ttvn, | |
3266 | tt_num_changes); | |
a513088d | 3267 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3268 | tt_vlan, tt_num_vlan, |
3269 | full_table); | |
a943cac1 ML |
3270 | return; |
3271 | } | |
3272 | } | |
3273 | } | |
3275e7cc | 3274 | |
c018ad3d AQ |
3275 | /** |
3276 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3277 | * @bat_priv: the bat priv with all the soft interface information | |
3278 | * @addr: the mac address of the client to check | |
3279 | * @vid: VLAN identifier | |
3280 | * | |
3281 | * Returns true if we know that the client has moved from its old originator | |
3282 | * to another one. This entry is still kept for consistency purposes and will be | |
3283 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3284 | */ |
56303d34 | 3285 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3286 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3287 | { |
56303d34 | 3288 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3289 | bool ret = false; |
3290 | ||
c018ad3d | 3291 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3292 | if (!tt_global_entry) |
3293 | goto out; | |
3294 | ||
c1d07431 | 3295 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3296 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3297 | out: |
3298 | return ret; | |
3299 | } | |
30cfd02b | 3300 | |
7c1fd91d AQ |
3301 | /** |
3302 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3303 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3304 | * @addr: the mac address of the local client to query |
3305 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3306 | * |
3307 | * Returns true if the local client is known to be roaming (it is not served by | |
3308 | * this node anymore) or not. If yes, the client is still present in the table | |
3309 | * to keep the latter consistent with the node TTVN | |
3310 | */ | |
3311 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3312 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3313 | { |
3314 | struct batadv_tt_local_entry *tt_local_entry; | |
3315 | bool ret = false; | |
3316 | ||
c018ad3d | 3317 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3318 | if (!tt_local_entry) |
3319 | goto out; | |
3320 | ||
3321 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3322 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3323 | out: | |
3324 | return ret; | |
7c1fd91d AQ |
3325 | } |
3326 | ||
30cfd02b AQ |
3327 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3328 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3329 | const unsigned char *addr, |
16052789 | 3330 | unsigned short vid) |
30cfd02b AQ |
3331 | { |
3332 | bool ret = false; | |
3333 | ||
16052789 | 3334 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3335 | BATADV_TT_CLIENT_TEMP, |
3336 | atomic_read(&orig_node->last_ttvn))) | |
3337 | goto out; | |
3338 | ||
3339 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3340 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3341 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3342 | ret = true; |
3343 | out: | |
3344 | return ret; | |
3345 | } | |
e1bf0c14 | 3346 | |
a19d3d85 ML |
3347 | /** |
3348 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3349 | * maximum packet size that can be transported through the mesh | |
3350 | * @soft_iface: netdev struct of the mesh interface | |
3351 | * | |
3352 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3353 | * to be removed. | |
3354 | */ | |
3355 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3356 | { | |
3357 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3358 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3359 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3360 | bool reduced = false; | |
3361 | ||
3362 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3363 | ||
3364 | while (true) { | |
3365 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3366 | if (packet_size_max >= table_size) | |
3367 | break; | |
3368 | ||
3369 | batadv_tt_local_purge(bat_priv, timeout); | |
3370 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3371 | ||
3372 | timeout /= 2; | |
3373 | reduced = true; | |
3374 | net_ratelimited_function(batadv_info, soft_iface, | |
3375 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3376 | packet_size_max); | |
3377 | } | |
3378 | ||
3379 | /* commit these changes immediately, to avoid synchronization problem | |
3380 | * with the TTVN | |
3381 | */ | |
3382 | if (reduced) | |
3383 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3384 | ||
3385 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3386 | } | |
3387 | ||
e1bf0c14 ML |
3388 | /** |
3389 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3390 | * @bat_priv: the bat priv with all the soft interface information | |
3391 | * @orig: the orig_node of the ogm | |
3392 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3393 | * @tvlv_value: tvlv buffer containing the gateway data | |
3394 | * @tvlv_value_len: tvlv buffer length | |
3395 | */ | |
3396 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3397 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3398 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3399 | uint16_t tvlv_value_len) |
3400 | { | |
7ea7b4a1 AQ |
3401 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3402 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3403 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3404 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3405 | |
3406 | if (tvlv_value_len < sizeof(*tt_data)) | |
3407 | return; | |
3408 | ||
3409 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3410 | tvlv_value_len -= sizeof(*tt_data); | |
3411 | ||
7ea7b4a1 AQ |
3412 | num_vlan = ntohs(tt_data->num_vlan); |
3413 | ||
3414 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3415 | return; | |
3416 | ||
3417 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3418 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3419 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3420 | ||
298e6e68 | 3421 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3422 | |
7ea7b4a1 AQ |
3423 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3424 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3425 | } |
3426 | ||
335fbe0f ML |
3427 | /** |
3428 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3429 | * container | |
3430 | * @bat_priv: the bat priv with all the soft interface information | |
3431 | * @src: mac address of tt tvlv sender | |
3432 | * @dst: mac address of tt tvlv recipient | |
3433 | * @tvlv_value: tvlv buffer containing the tt data | |
3434 | * @tvlv_value_len: tvlv buffer length | |
3435 | * | |
3436 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3437 | * otherwise. | |
3438 | */ | |
3439 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3440 | uint8_t *src, uint8_t *dst, | |
3441 | void *tvlv_value, | |
3442 | uint16_t tvlv_value_len) | |
3443 | { | |
3444 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3445 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3446 | char tt_flag; |
3447 | bool ret; | |
3448 | ||
3449 | if (tvlv_value_len < sizeof(*tt_data)) | |
3450 | return NET_RX_SUCCESS; | |
3451 | ||
3452 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3453 | tvlv_value_len -= sizeof(*tt_data); | |
3454 | ||
7ea7b4a1 AQ |
3455 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3456 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3457 | ||
3458 | if (tvlv_value_len < tt_vlan_len) | |
3459 | return NET_RX_SUCCESS; | |
3460 | ||
3461 | tvlv_value_len -= tt_vlan_len; | |
3462 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3463 | |
3464 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3465 | case BATADV_TT_REQUEST: | |
3466 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3467 | ||
3468 | /* If this node cannot provide a TT response the tt_request is | |
3469 | * forwarded | |
3470 | */ | |
3471 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3472 | if (!ret) { | |
3473 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3474 | tt_flag = 'F'; | |
3475 | else | |
3476 | tt_flag = '.'; | |
3477 | ||
3478 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3479 | "Routing TT_REQUEST to %pM [%c]\n", | |
3480 | dst, tt_flag); | |
3481 | /* tvlv API will re-route the packet */ | |
3482 | return NET_RX_DROP; | |
3483 | } | |
3484 | break; | |
3485 | case BATADV_TT_RESPONSE: | |
3486 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3487 | ||
3488 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3489 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3490 | src, tt_num_entries); |
335fbe0f ML |
3491 | return NET_RX_SUCCESS; |
3492 | } | |
3493 | ||
3494 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3495 | tt_flag = 'F'; | |
3496 | else | |
3497 | tt_flag = '.'; | |
3498 | ||
3499 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3500 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3501 | ||
3502 | /* tvlv API will re-route the packet */ | |
3503 | return NET_RX_DROP; | |
3504 | } | |
3505 | ||
3506 | return NET_RX_SUCCESS; | |
3507 | } | |
3508 | ||
122edaa0 ML |
3509 | /** |
3510 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3511 | * @bat_priv: the bat priv with all the soft interface information | |
3512 | * @src: mac address of tt tvlv sender | |
3513 | * @dst: mac address of tt tvlv recipient | |
3514 | * @tvlv_value: tvlv buffer containing the tt data | |
3515 | * @tvlv_value_len: tvlv buffer length | |
3516 | * | |
3517 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3518 | * otherwise. | |
3519 | */ | |
3520 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3521 | uint8_t *src, uint8_t *dst, | |
3522 | void *tvlv_value, | |
3523 | uint16_t tvlv_value_len) | |
3524 | { | |
3525 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3526 | struct batadv_orig_node *orig_node = NULL; | |
3527 | ||
3528 | /* If this node is not the intended recipient of the | |
3529 | * roaming advertisement the packet is forwarded | |
3530 | * (the tvlv API will re-route the packet). | |
3531 | */ | |
3532 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3533 | return NET_RX_DROP; | |
3534 | ||
122edaa0 ML |
3535 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3536 | goto out; | |
3537 | ||
3538 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3539 | if (!orig_node) | |
3540 | goto out; | |
3541 | ||
3542 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3543 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3544 | ||
3545 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3546 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3547 | src, roaming_adv->client); | |
3548 | ||
3549 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3550 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3551 | atomic_read(&orig_node->last_ttvn) + 1); |
3552 | ||
3553 | out: | |
3554 | if (orig_node) | |
3555 | batadv_orig_node_free_ref(orig_node); | |
3556 | return NET_RX_SUCCESS; | |
3557 | } | |
3558 | ||
e1bf0c14 ML |
3559 | /** |
3560 | * batadv_tt_init - initialise the translation table internals | |
3561 | * @bat_priv: the bat priv with all the soft interface information | |
3562 | * | |
3563 | * Return 0 on success or negative error number in case of failure. | |
3564 | */ | |
3565 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3566 | { | |
3567 | int ret; | |
3568 | ||
0eb01568 AQ |
3569 | /* synchronized flags must be remote */ |
3570 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3571 | ||
e1bf0c14 ML |
3572 | ret = batadv_tt_local_init(bat_priv); |
3573 | if (ret < 0) | |
3574 | return ret; | |
3575 | ||
3576 | ret = batadv_tt_global_init(bat_priv); | |
3577 | if (ret < 0) | |
3578 | return ret; | |
3579 | ||
3580 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3581 | batadv_tt_tvlv_unicast_handler_v1, |
3582 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3583 | |
122edaa0 ML |
3584 | batadv_tvlv_handler_register(bat_priv, NULL, |
3585 | batadv_roam_tvlv_unicast_handler_v1, | |
3586 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3587 | ||
e1bf0c14 ML |
3588 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3589 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3590 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3591 | ||
3592 | return 1; | |
3593 | } | |
42cb0bef AQ |
3594 | |
3595 | /** | |
3596 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3597 | * @bat_priv: the bat priv with all the soft interface information | |
3598 | * @addr: the mac address of the client | |
3599 | * @vid: the identifier of the VLAN where this client is connected | |
3600 | * | |
3601 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3602 | * otherwise | |
3603 | */ | |
3604 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3605 | const uint8_t *addr, unsigned short vid) | |
3606 | { | |
3607 | struct batadv_tt_global_entry *tt; | |
3608 | bool ret; | |
3609 | ||
3610 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3611 | if (!tt) | |
3612 | return false; | |
3613 | ||
3614 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3615 | ||
3616 | batadv_tt_global_entry_free_ref(tt); | |
3617 | ||
3618 | return ret; | |
3619 | } |