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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
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 | ||
c018ad3d AQ |
99 | memcpy(to_search.addr, addr, ETH_ALEN); |
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)); | |
3abe4adb | 336 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
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 | |
47c94655 | 552 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
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 SE |
1279 | common = &tt_global_entry->common; |
1280 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
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 | ||
981d8900 | 1385 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
4627456a | 1386 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1387 | * @tt_global_entry: global translation table entry to be analyzed |
1388 | * | |
1389 | * This functon assumes the caller holds rcu_read_lock(). | |
1390 | * Returns best originator list entry or NULL on errors. | |
1391 | */ | |
1392 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1393 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1394 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1395 | { |
4627456a AQ |
1396 | struct batadv_neigh_node *router, *best_router = NULL; |
1397 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1398 | struct hlist_head *head; |
981d8900 | 1399 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1400 | |
1401 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1402 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1403 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
1404 | if (!router) | |
1405 | continue; | |
1406 | ||
4627456a AQ |
1407 | if (best_router && |
1408 | bao->bat_neigh_cmp(router, best_router) <= 0) { | |
1409 | batadv_neigh_node_free_ref(router); | |
1410 | continue; | |
981d8900 SE |
1411 | } |
1412 | ||
4627456a AQ |
1413 | /* release the refcount for the "old" best */ |
1414 | if (best_router) | |
1415 | batadv_neigh_node_free_ref(best_router); | |
1416 | ||
1417 | best_entry = orig_entry; | |
1418 | best_router = router; | |
981d8900 SE |
1419 | } |
1420 | ||
4627456a AQ |
1421 | if (best_router) |
1422 | batadv_neigh_node_free_ref(best_router); | |
1423 | ||
981d8900 SE |
1424 | return best_entry; |
1425 | } | |
1426 | ||
1427 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1428 | * for this global entry | |
4627456a | 1429 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1430 | * @tt_global_entry: global translation table entry to be printed |
1431 | * @seq: debugfs table seq_file struct | |
1432 | * | |
1433 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1434 | */ |
a513088d | 1435 | static void |
4627456a AQ |
1436 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1437 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1438 | struct seq_file *seq) |
db08e6e5 | 1439 | { |
981d8900 | 1440 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1441 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1442 | struct batadv_orig_node_vlan *vlan; |
1443 | struct hlist_head *head; | |
db08e6e5 | 1444 | uint8_t last_ttvn; |
7ea7b4a1 | 1445 | uint16_t flags; |
db08e6e5 SW |
1446 | |
1447 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1448 | flags = tt_common_entry->flags; |
1449 | ||
4627456a | 1450 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1451 | if (best_entry) { |
7ea7b4a1 AQ |
1452 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1453 | tt_common_entry->vid); | |
1454 | if (!vlan) { | |
1455 | seq_printf(seq, | |
1456 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1457 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1458 | best_entry->orig_node->orig); | |
1459 | goto print_list; | |
1460 | } | |
1461 | ||
981d8900 | 1462 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1463 | seq_printf(seq, |
dd24ddb2 | 1464 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1465 | '*', tt_global_entry->common.addr, |
16052789 | 1466 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1467 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1468 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1469 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1470 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
dd24ddb2 | 1471 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
981d8900 | 1472 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1473 | |
1474 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1475 | } |
db08e6e5 | 1476 | |
7ea7b4a1 | 1477 | print_list: |
db08e6e5 SW |
1478 | head = &tt_global_entry->orig_list; |
1479 | ||
b67bfe0d | 1480 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1481 | if (best_entry == orig_entry) |
1482 | continue; | |
1483 | ||
7ea7b4a1 AQ |
1484 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1485 | tt_common_entry->vid); | |
1486 | if (!vlan) { | |
1487 | seq_printf(seq, | |
1488 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1489 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1490 | orig_entry->orig_node->orig); | |
1491 | continue; | |
1492 | } | |
1493 | ||
db08e6e5 | 1494 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1495 | seq_printf(seq, |
dd24ddb2 | 1496 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1497 | '+', tt_global_entry->common.addr, |
16052789 | 1498 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1499 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1500 | last_ttvn, vlan->tt.crc, |
acd34afa | 1501 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b | 1502 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 | 1503 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
30cfd02b | 1504 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1505 | |
1506 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1507 | } |
1508 | } | |
1509 | ||
08c36d3e | 1510 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1511 | { |
1512 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1513 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1514 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1515 | struct batadv_tt_common_entry *tt_common_entry; |
1516 | struct batadv_tt_global_entry *tt_global; | |
1517 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1518 | struct hlist_head *head; |
c90681b8 | 1519 | uint32_t i; |
c6c8fea2 | 1520 | |
30da63a6 ML |
1521 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1522 | if (!primary_if) | |
32ae9b22 | 1523 | goto out; |
c6c8fea2 | 1524 | |
2dafb49d AQ |
1525 | seq_printf(seq, |
1526 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1527 | net_dev->name); |
16052789 AQ |
1528 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1529 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1530 | "CRC", "Flags"); | |
c6c8fea2 | 1531 | |
c6c8fea2 SE |
1532 | for (i = 0; i < hash->size; i++) { |
1533 | head = &hash->table[i]; | |
1534 | ||
7aadf889 | 1535 | rcu_read_lock(); |
b67bfe0d | 1536 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1537 | head, hash_entry) { |
56303d34 SE |
1538 | tt_global = container_of(tt_common_entry, |
1539 | struct batadv_tt_global_entry, | |
1540 | common); | |
4627456a | 1541 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1542 | } |
7aadf889 | 1543 | rcu_read_unlock(); |
c6c8fea2 | 1544 | } |
32ae9b22 ML |
1545 | out: |
1546 | if (primary_if) | |
e5d89254 | 1547 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1548 | return 0; |
c6c8fea2 SE |
1549 | } |
1550 | ||
db08e6e5 | 1551 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1552 | static void |
56303d34 | 1553 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1554 | { |
db08e6e5 | 1555 | struct hlist_head *head; |
b67bfe0d | 1556 | struct hlist_node *safe; |
56303d34 | 1557 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1558 | |
db08e6e5 SW |
1559 | spin_lock_bh(&tt_global_entry->list_lock); |
1560 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1561 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1562 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1563 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1564 | tt_global_entry->common.vid); | |
a513088d | 1565 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1566 | } |
1567 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1568 | } |
1569 | ||
a513088d | 1570 | static void |
56303d34 SE |
1571 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1572 | struct batadv_tt_global_entry *tt_global_entry, | |
1573 | struct batadv_orig_node *orig_node, | |
a513088d | 1574 | const char *message) |
db08e6e5 SW |
1575 | { |
1576 | struct hlist_head *head; | |
b67bfe0d | 1577 | struct hlist_node *safe; |
56303d34 | 1578 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1579 | unsigned short vid; |
db08e6e5 SW |
1580 | |
1581 | spin_lock_bh(&tt_global_entry->list_lock); | |
1582 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1583 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1584 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1585 | vid = tt_global_entry->common.vid; |
39c75a51 | 1586 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1587 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1588 | orig_node->orig, |
16052789 AQ |
1589 | tt_global_entry->common.addr, |
1590 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1591 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1592 | batadv_tt_global_size_dec(orig_node, |
1593 | tt_global_entry->common.vid); | |
a513088d | 1594 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1595 | } |
1596 | } | |
1597 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1598 | } | |
1599 | ||
db08e6e5 | 1600 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1601 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1602 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1603 | */ |
a513088d | 1604 | static void |
56303d34 SE |
1605 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1606 | struct batadv_tt_global_entry *tt_global_entry, | |
1607 | struct batadv_orig_node *orig_node, | |
1608 | const char *message) | |
db08e6e5 SW |
1609 | { |
1610 | bool last_entry = true; | |
1611 | struct hlist_head *head; | |
56303d34 | 1612 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1613 | |
1614 | /* no local entry exists, case 1: | |
1615 | * Check if this is the last one or if other entries exist. | |
1616 | */ | |
1617 | ||
1618 | rcu_read_lock(); | |
1619 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1620 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1621 | if (orig_entry->orig_node != orig_node) { |
1622 | last_entry = false; | |
1623 | break; | |
1624 | } | |
1625 | } | |
1626 | rcu_read_unlock(); | |
1627 | ||
1628 | if (last_entry) { | |
1629 | /* its the last one, mark for roaming. */ | |
acd34afa | 1630 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1631 | tt_global_entry->roam_at = jiffies; |
1632 | } else | |
1633 | /* there is another entry, we can simply delete this | |
1634 | * one and can still use the other one. | |
1635 | */ | |
a513088d SE |
1636 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1637 | orig_node, message); | |
db08e6e5 SW |
1638 | } |
1639 | ||
c018ad3d AQ |
1640 | /** |
1641 | * batadv_tt_global_del - remove a client from the global table | |
1642 | * @bat_priv: the bat priv with all the soft interface information | |
1643 | * @orig_node: an originator serving this client | |
1644 | * @addr: the mac address of the client | |
1645 | * @vid: VLAN identifier | |
1646 | * @message: a message explaining the reason for deleting the client to print | |
1647 | * for debugging purpose | |
1648 | * @roaming: true if the deletion has been triggered by a roaming event | |
1649 | */ | |
56303d34 SE |
1650 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1651 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1652 | const unsigned char *addr, unsigned short vid, |
a513088d | 1653 | const char *message, bool roaming) |
a73105b8 | 1654 | { |
170173bf | 1655 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1656 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1657 | |
c018ad3d | 1658 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1659 | if (!tt_global_entry) |
7683fdc1 | 1660 | goto out; |
a73105b8 | 1661 | |
db08e6e5 | 1662 | if (!roaming) { |
a513088d SE |
1663 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1664 | orig_node, message); | |
db08e6e5 SW |
1665 | |
1666 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1667 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1668 | message); | |
db08e6e5 SW |
1669 | |
1670 | goto out; | |
1671 | } | |
92f90f56 SE |
1672 | |
1673 | /* if we are deleting a global entry due to a roam | |
1674 | * event, there are two possibilities: | |
db08e6e5 SW |
1675 | * 1) the client roamed from node A to node B => if there |
1676 | * is only one originator left for this client, we mark | |
acd34afa | 1677 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1678 | * wait for node B to claim it. In case of timeout |
1679 | * the entry is purged. | |
db08e6e5 SW |
1680 | * |
1681 | * If there are other originators left, we directly delete | |
1682 | * the originator. | |
92f90f56 | 1683 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1684 | * the global entry, since it is useless now. |
1685 | */ | |
a513088d | 1686 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1687 | tt_global_entry->common.addr, |
1688 | vid); | |
a513088d | 1689 | if (local_entry) { |
db08e6e5 | 1690 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1691 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1692 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1693 | } else |
1694 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1695 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1696 | orig_node, message); | |
92f90f56 | 1697 | |
92f90f56 | 1698 | |
cc47f66e | 1699 | out: |
7683fdc1 | 1700 | if (tt_global_entry) |
a513088d SE |
1701 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1702 | if (local_entry) | |
1703 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1704 | } |
1705 | ||
95fb130d AQ |
1706 | /** |
1707 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1708 | * given originator matching the provided vid | |
1709 | * @bat_priv: the bat priv with all the soft interface information | |
1710 | * @orig_node: the originator owning the entries to remove | |
1711 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1712 | * removed | |
1713 | * @message: debug message to print as "reason" | |
1714 | */ | |
56303d34 SE |
1715 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1716 | struct batadv_orig_node *orig_node, | |
95fb130d | 1717 | int32_t match_vid, |
56303d34 | 1718 | const char *message) |
c6c8fea2 | 1719 | { |
56303d34 SE |
1720 | struct batadv_tt_global_entry *tt_global; |
1721 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1722 | uint32_t i; |
807736f6 | 1723 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1724 | struct hlist_node *safe; |
a73105b8 | 1725 | struct hlist_head *head; |
7683fdc1 | 1726 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1727 | unsigned short vid; |
c6c8fea2 | 1728 | |
6e801494 SW |
1729 | if (!hash) |
1730 | return; | |
1731 | ||
a73105b8 AQ |
1732 | for (i = 0; i < hash->size; i++) { |
1733 | head = &hash->table[i]; | |
7683fdc1 | 1734 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1735 | |
7683fdc1 | 1736 | spin_lock_bh(list_lock); |
b67bfe0d | 1737 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1738 | head, hash_entry) { |
95fb130d AQ |
1739 | /* remove only matching entries */ |
1740 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1741 | continue; | |
1742 | ||
56303d34 SE |
1743 | tt_global = container_of(tt_common_entry, |
1744 | struct batadv_tt_global_entry, | |
1745 | common); | |
db08e6e5 | 1746 | |
56303d34 | 1747 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1748 | orig_node, message); |
db08e6e5 | 1749 | |
56303d34 | 1750 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1751 | vid = tt_global->common.vid; |
39c75a51 | 1752 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1753 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1754 | tt_global->common.addr, | |
1755 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1756 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1757 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1758 | } |
a73105b8 | 1759 | } |
7683fdc1 | 1760 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1761 | } |
17071578 | 1762 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1763 | } |
1764 | ||
30cfd02b AQ |
1765 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1766 | char **msg) | |
cc47f66e | 1767 | { |
30cfd02b AQ |
1768 | bool purge = false; |
1769 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1770 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1771 | |
30cfd02b AQ |
1772 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1773 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1774 | purge = true; | |
1775 | *msg = "Roaming timeout\n"; | |
1776 | } | |
42d0b044 | 1777 | |
30cfd02b AQ |
1778 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1779 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1780 | purge = true; | |
1781 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1782 | } |
30cfd02b AQ |
1783 | |
1784 | return purge; | |
42d0b044 SE |
1785 | } |
1786 | ||
30cfd02b | 1787 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1788 | { |
807736f6 | 1789 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1790 | struct hlist_head *head; |
b67bfe0d | 1791 | struct hlist_node *node_tmp; |
7683fdc1 | 1792 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1793 | uint32_t i; |
30cfd02b AQ |
1794 | char *msg = NULL; |
1795 | struct batadv_tt_common_entry *tt_common; | |
1796 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1797 | |
cc47f66e AQ |
1798 | for (i = 0; i < hash->size; i++) { |
1799 | head = &hash->table[i]; | |
7683fdc1 | 1800 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1801 | |
7683fdc1 | 1802 | spin_lock_bh(list_lock); |
b67bfe0d | 1803 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1804 | hash_entry) { |
1805 | tt_global = container_of(tt_common, | |
1806 | struct batadv_tt_global_entry, | |
1807 | common); | |
1808 | ||
1809 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1810 | continue; | |
1811 | ||
1812 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1813 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1814 | tt_global->common.addr, | |
1815 | BATADV_PRINT_VID(tt_global->common.vid), | |
1816 | msg); | |
30cfd02b | 1817 | |
b67bfe0d | 1818 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1819 | |
1820 | batadv_tt_global_entry_free_ref(tt_global); | |
1821 | } | |
7683fdc1 | 1822 | spin_unlock_bh(list_lock); |
cc47f66e | 1823 | } |
cc47f66e AQ |
1824 | } |
1825 | ||
56303d34 | 1826 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1827 | { |
5bf74e9c | 1828 | struct batadv_hashtable *hash; |
7683fdc1 | 1829 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1830 | struct batadv_tt_common_entry *tt_common_entry; |
1831 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1832 | struct hlist_node *node_tmp; |
7683fdc1 | 1833 | struct hlist_head *head; |
c90681b8 | 1834 | uint32_t i; |
7683fdc1 | 1835 | |
807736f6 | 1836 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1837 | return; |
1838 | ||
807736f6 | 1839 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1840 | |
1841 | for (i = 0; i < hash->size; i++) { | |
1842 | head = &hash->table[i]; | |
1843 | list_lock = &hash->list_locks[i]; | |
1844 | ||
1845 | spin_lock_bh(list_lock); | |
b67bfe0d | 1846 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1847 | head, hash_entry) { |
b67bfe0d | 1848 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1849 | tt_global = container_of(tt_common_entry, |
1850 | struct batadv_tt_global_entry, | |
1851 | common); | |
1852 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1853 | } |
1854 | spin_unlock_bh(list_lock); | |
1855 | } | |
1856 | ||
1a8eaf07 | 1857 | batadv_hash_destroy(hash); |
7683fdc1 | 1858 | |
807736f6 | 1859 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1860 | } |
1861 | ||
56303d34 SE |
1862 | static bool |
1863 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1864 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1865 | { |
1866 | bool ret = false; | |
1867 | ||
acd34afa SE |
1868 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1869 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1870 | ret = true; |
1871 | ||
2d2fcc2a AQ |
1872 | /* check if the two clients are marked as isolated */ |
1873 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1874 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1875 | ret = true; | |
1876 | ||
59b699cd AQ |
1877 | return ret; |
1878 | } | |
1879 | ||
c018ad3d AQ |
1880 | /** |
1881 | * batadv_transtable_search - get the mesh destination for a given client | |
1882 | * @bat_priv: the bat priv with all the soft interface information | |
1883 | * @src: mac address of the source client | |
1884 | * @addr: mac address of the destination client | |
1885 | * @vid: VLAN identifier | |
1886 | * | |
1887 | * Returns a pointer to the originator that was selected as destination in the | |
1888 | * mesh for contacting the client 'addr', NULL otherwise. | |
1889 | * In case of multiple originators serving the same client, the function returns | |
1890 | * the best one (best in terms of metric towards the destination node). | |
1891 | * | |
1892 | * If the two clients are AP isolated the function returns NULL. | |
1893 | */ | |
56303d34 SE |
1894 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1895 | const uint8_t *src, | |
c018ad3d AQ |
1896 | const uint8_t *addr, |
1897 | unsigned short vid) | |
c6c8fea2 | 1898 | { |
56303d34 SE |
1899 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1900 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1901 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1902 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 1903 | |
eceb22ae | 1904 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 1905 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1906 | if (!tt_local_entry || |
1907 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1908 | goto out; |
1909 | } | |
7aadf889 | 1910 | |
c018ad3d | 1911 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1912 | if (!tt_global_entry) |
7b36e8ee | 1913 | goto out; |
7aadf889 | 1914 | |
3d393e47 | 1915 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1916 | * isolation |
1917 | */ | |
a513088d SE |
1918 | if (tt_local_entry && |
1919 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1920 | goto out; |
1921 | ||
db08e6e5 | 1922 | rcu_read_lock(); |
4627456a | 1923 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1924 | /* found anything? */ |
981d8900 SE |
1925 | if (best_entry) |
1926 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1927 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1928 | orig_node = NULL; | |
1929 | rcu_read_unlock(); | |
981d8900 | 1930 | |
7b36e8ee | 1931 | out: |
3d393e47 | 1932 | if (tt_global_entry) |
a513088d | 1933 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1934 | if (tt_local_entry) |
a513088d | 1935 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1936 | |
7b36e8ee | 1937 | return orig_node; |
c6c8fea2 | 1938 | } |
a73105b8 | 1939 | |
ced72933 AQ |
1940 | /** |
1941 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1942 | * to the given orig_node | |
1943 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1944 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1945 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1946 | * |
1947 | * This function computes the checksum for the global table corresponding to a | |
1948 | * specific originator. In particular, the checksum is computed as follows: For | |
1949 | * each client connected to the originator the CRC32C of the MAC address and the | |
1950 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1951 | * together. | |
1952 | * | |
1953 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1954 | * produce a unique hash of the table, but since the order which is used to feed | |
1955 | * the CRC32C function affects the result and since every node in the network | |
1956 | * probably sorts the clients differently, the hash function cannot be directly | |
1957 | * computed over the entire table. Hence the CRC32C is used only on | |
1958 | * the single client entry, while all the results are then xor'ed together | |
1959 | * because the XOR operation can combine them all while trying to reduce the | |
1960 | * noise as much as possible. | |
1961 | * | |
1962 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1963 | */ |
1964 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1965 | struct batadv_orig_node *orig_node, |
1966 | unsigned short vid) | |
a73105b8 | 1967 | { |
807736f6 | 1968 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1969 | struct batadv_tt_common_entry *tt_common; |
1970 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1971 | struct hlist_head *head; |
0ffa9e8d | 1972 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 1973 | uint8_t flags; |
a73105b8 AQ |
1974 | |
1975 | for (i = 0; i < hash->size; i++) { | |
1976 | head = &hash->table[i]; | |
1977 | ||
1978 | rcu_read_lock(); | |
b67bfe0d | 1979 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1980 | tt_global = container_of(tt_common, |
1981 | struct batadv_tt_global_entry, | |
1982 | common); | |
7ea7b4a1 AQ |
1983 | /* compute the CRC only for entries belonging to the |
1984 | * VLAN identified by the vid passed as parameter | |
1985 | */ | |
1986 | if (tt_common->vid != vid) | |
1987 | continue; | |
1988 | ||
db08e6e5 SW |
1989 | /* Roaming clients are in the global table for |
1990 | * consistency only. They don't have to be | |
1991 | * taken into account while computing the | |
1992 | * global crc | |
1993 | */ | |
acd34afa | 1994 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1995 | continue; |
30cfd02b AQ |
1996 | /* Temporary clients have not been announced yet, so |
1997 | * they have to be skipped while computing the global | |
1998 | * crc | |
1999 | */ | |
2000 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2001 | continue; | |
db08e6e5 SW |
2002 | |
2003 | /* find out if this global entry is announced by this | |
2004 | * originator | |
2005 | */ | |
56303d34 | 2006 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2007 | orig_node)) |
db08e6e5 SW |
2008 | continue; |
2009 | ||
0ffa9e8d AQ |
2010 | crc_tmp = crc32c(0, &tt_common->vid, |
2011 | sizeof(tt_common->vid)); | |
0eb01568 AQ |
2012 | |
2013 | /* compute the CRC on flags that have to be kept in sync | |
2014 | * among nodes | |
2015 | */ | |
2016 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2017 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2018 | ||
0ffa9e8d | 2019 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2020 | } |
2021 | rcu_read_unlock(); | |
2022 | } | |
2023 | ||
ced72933 | 2024 | return crc; |
a73105b8 AQ |
2025 | } |
2026 | ||
ced72933 AQ |
2027 | /** |
2028 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2029 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2030 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2031 | * |
2032 | * For details about the computation, please refer to the documentation for | |
2033 | * batadv_tt_global_crc(). | |
2034 | * | |
2035 | * Returns the checksum of the local table | |
ced72933 | 2036 | */ |
7ea7b4a1 AQ |
2037 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2038 | unsigned short vid) | |
a73105b8 | 2039 | { |
807736f6 | 2040 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2041 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2042 | struct hlist_head *head; |
0ffa9e8d | 2043 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2044 | uint8_t flags; |
a73105b8 AQ |
2045 | |
2046 | for (i = 0; i < hash->size; i++) { | |
2047 | head = &hash->table[i]; | |
2048 | ||
2049 | rcu_read_lock(); | |
b67bfe0d | 2050 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2051 | /* compute the CRC only for entries belonging to the |
2052 | * VLAN identified by vid | |
2053 | */ | |
2054 | if (tt_common->vid != vid) | |
2055 | continue; | |
2056 | ||
058d0e26 | 2057 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2058 | * account while computing the CRC |
2059 | */ | |
acd34afa | 2060 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2061 | continue; |
ced72933 | 2062 | |
0ffa9e8d AQ |
2063 | crc_tmp = crc32c(0, &tt_common->vid, |
2064 | sizeof(tt_common->vid)); | |
0eb01568 AQ |
2065 | |
2066 | /* compute the CRC on flags that have to be kept in sync | |
2067 | * among nodes | |
2068 | */ | |
2069 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2070 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2071 | ||
0ffa9e8d | 2072 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2073 | } |
a73105b8 AQ |
2074 | rcu_read_unlock(); |
2075 | } | |
2076 | ||
ced72933 | 2077 | return crc; |
a73105b8 AQ |
2078 | } |
2079 | ||
56303d34 | 2080 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2081 | { |
56303d34 | 2082 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2083 | |
807736f6 | 2084 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2085 | |
807736f6 | 2086 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2087 | list_del(&node->list); |
2088 | kfree(node); | |
2089 | } | |
2090 | ||
807736f6 | 2091 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2092 | } |
2093 | ||
56303d34 SE |
2094 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2095 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2096 | const void *tt_buff, |
2097 | uint16_t tt_buff_len) | |
a73105b8 | 2098 | { |
a73105b8 | 2099 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2100 | * last OGM (the OGM could carry no changes) |
2101 | */ | |
a73105b8 AQ |
2102 | spin_lock_bh(&orig_node->tt_buff_lock); |
2103 | if (tt_buff_len > 0) { | |
2104 | kfree(orig_node->tt_buff); | |
2105 | orig_node->tt_buff_len = 0; | |
2106 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2107 | if (orig_node->tt_buff) { | |
2108 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2109 | orig_node->tt_buff_len = tt_buff_len; | |
2110 | } | |
2111 | } | |
2112 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2113 | } | |
2114 | ||
56303d34 | 2115 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2116 | { |
56303d34 | 2117 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2118 | |
807736f6 SE |
2119 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2120 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2121 | if (batadv_has_timed_out(node->issued_at, |
2122 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2123 | list_del(&node->list); |
2124 | kfree(node); | |
2125 | } | |
2126 | } | |
807736f6 | 2127 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2128 | } |
2129 | ||
2130 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2131 | * has already been issued for this orig_node, NULL otherwise |
2132 | */ | |
56303d34 SE |
2133 | static struct batadv_tt_req_node * |
2134 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2135 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2136 | { |
56303d34 | 2137 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2138 | |
807736f6 SE |
2139 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2140 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2141 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2142 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2143 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2144 | goto unlock; |
2145 | } | |
2146 | ||
2147 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2148 | if (!tt_req_node) | |
2149 | goto unlock; | |
2150 | ||
2151 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
2152 | tt_req_node->issued_at = jiffies; | |
2153 | ||
807736f6 | 2154 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2155 | unlock: |
807736f6 | 2156 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2157 | return tt_req_node; |
2158 | } | |
2159 | ||
335fbe0f ML |
2160 | /** |
2161 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2162 | * @entry_ptr: to be checked local tt entry | |
2163 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2164 | * | |
2165 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2166 | */ | |
2167 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2168 | { |
56303d34 | 2169 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2170 | |
acd34afa | 2171 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2172 | return 0; |
2173 | return 1; | |
2174 | } | |
2175 | ||
a513088d SE |
2176 | static int batadv_tt_global_valid(const void *entry_ptr, |
2177 | const void *data_ptr) | |
a73105b8 | 2178 | { |
56303d34 SE |
2179 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2180 | const struct batadv_tt_global_entry *tt_global_entry; | |
2181 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2182 | |
30cfd02b AQ |
2183 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2184 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2185 | return 0; |
2186 | ||
56303d34 SE |
2187 | tt_global_entry = container_of(tt_common_entry, |
2188 | struct batadv_tt_global_entry, | |
48100bac AQ |
2189 | common); |
2190 | ||
a513088d | 2191 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2192 | } |
2193 | ||
335fbe0f | 2194 | /** |
7ea7b4a1 AQ |
2195 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2196 | * specified tt hash | |
335fbe0f ML |
2197 | * @bat_priv: the bat priv with all the soft interface information |
2198 | * @hash: hash table containing the tt entries | |
2199 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2200 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2201 | * @valid_cb: function to filter tt change entries |
2202 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2203 | */ |
7ea7b4a1 AQ |
2204 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2205 | struct batadv_hashtable *hash, | |
2206 | void *tvlv_buff, uint16_t tt_len, | |
2207 | int (*valid_cb)(const void *, const void *), | |
2208 | void *cb_data) | |
a73105b8 | 2209 | { |
56303d34 | 2210 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2211 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2212 | struct hlist_head *head; |
335fbe0f | 2213 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2214 | uint32_t i; |
a73105b8 | 2215 | |
298e6e68 | 2216 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2217 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2218 | |
2219 | rcu_read_lock(); | |
2220 | for (i = 0; i < hash->size; i++) { | |
2221 | head = &hash->table[i]; | |
2222 | ||
b67bfe0d | 2223 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2224 | head, hash_entry) { |
335fbe0f | 2225 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2226 | break; |
2227 | ||
48100bac | 2228 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2229 | continue; |
2230 | ||
48100bac AQ |
2231 | memcpy(tt_change->addr, tt_common_entry->addr, |
2232 | ETH_ALEN); | |
27b37ebf | 2233 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2234 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2235 | memset(tt_change->reserved, 0, |
2236 | sizeof(tt_change->reserved)); | |
a73105b8 | 2237 | |
335fbe0f | 2238 | tt_num_entries++; |
a73105b8 AQ |
2239 | tt_change++; |
2240 | } | |
2241 | } | |
2242 | rcu_read_unlock(); | |
7ea7b4a1 | 2243 | } |
a73105b8 | 2244 | |
7ea7b4a1 AQ |
2245 | /** |
2246 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2247 | * @orig_node: originator for which the CRCs have to be checked | |
2248 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2249 | * @num_vlan: number of tvlv VLAN entries | |
2250 | * @create: if true, create VLAN objects if not found | |
2251 | * | |
2252 | * Return true if all the received CRCs match the locally stored ones, false | |
2253 | * otherwise | |
2254 | */ | |
2255 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2256 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2257 | uint16_t num_vlan) | |
2258 | { | |
2259 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2260 | struct batadv_orig_node_vlan *vlan; | |
2261 | int i; | |
2262 | ||
2263 | /* check if each received CRC matches the locally stored one */ | |
2264 | for (i = 0; i < num_vlan; i++) { | |
2265 | tt_vlan_tmp = tt_vlan + i; | |
2266 | ||
2267 | /* if orig_node is a backbone node for this VLAN, don't check | |
2268 | * the CRC as we ignore all the global entries over it | |
2269 | */ | |
2270 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2271 | orig_node->orig, |
2272 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2273 | continue; |
2274 | ||
2275 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2276 | ntohs(tt_vlan_tmp->vid)); | |
2277 | if (!vlan) | |
2278 | return false; | |
2279 | ||
2280 | if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) | |
2281 | return false; | |
2282 | } | |
2283 | ||
2284 | return true; | |
2285 | } | |
2286 | ||
2287 | /** | |
2288 | * batadv_tt_local_update_crc - update all the local CRCs | |
2289 | * @bat_priv: the bat priv with all the soft interface information | |
2290 | */ | |
2291 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2292 | { | |
2293 | struct batadv_softif_vlan *vlan; | |
2294 | ||
2295 | /* recompute the global CRC for each VLAN */ | |
2296 | rcu_read_lock(); | |
2297 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2298 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2299 | } | |
2300 | rcu_read_unlock(); | |
2301 | } | |
2302 | ||
2303 | /** | |
2304 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2305 | * @bat_priv: the bat priv with all the soft interface information | |
2306 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2307 | */ | |
2308 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2309 | struct batadv_orig_node *orig_node) | |
2310 | { | |
2311 | struct batadv_orig_node_vlan *vlan; | |
2312 | uint32_t crc; | |
2313 | ||
2314 | /* recompute the global CRC for each VLAN */ | |
2315 | rcu_read_lock(); | |
2316 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2317 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2318 | * the CRC as we ignore all the global entries over it | |
2319 | */ | |
cfd4f757 AQ |
2320 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2321 | vlan->vid)) | |
7ea7b4a1 AQ |
2322 | continue; |
2323 | ||
2324 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2325 | vlan->tt.crc = crc; | |
2326 | } | |
2327 | rcu_read_unlock(); | |
a73105b8 AQ |
2328 | } |
2329 | ||
ced72933 AQ |
2330 | /** |
2331 | * batadv_send_tt_request - send a TT Request message to a given node | |
2332 | * @bat_priv: the bat priv with all the soft interface information | |
2333 | * @dst_orig_node: the destination of the message | |
2334 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2335 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2336 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2337 | * @full_table: ask for the entire translation table if true, while only for the |
2338 | * last TT diff otherwise | |
2339 | */ | |
56303d34 SE |
2340 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2341 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2342 | uint8_t ttvn, |
2343 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2344 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2345 | { |
335fbe0f | 2346 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2347 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2348 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2349 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2350 | bool ret = false; |
7ea7b4a1 | 2351 | int i, size; |
a73105b8 | 2352 | |
e5d89254 | 2353 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2354 | if (!primary_if) |
2355 | goto out; | |
2356 | ||
2357 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2358 | * reply from the same orig_node yet |
2359 | */ | |
a513088d | 2360 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2361 | if (!tt_req_node) |
2362 | goto out; | |
2363 | ||
7ea7b4a1 AQ |
2364 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2365 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2366 | if (!tvlv_tt_data) |
a73105b8 AQ |
2367 | goto out; |
2368 | ||
335fbe0f ML |
2369 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2370 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2371 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2372 | ||
2373 | /* send all the CRCs within the request. This is needed by intermediate | |
2374 | * nodes to ensure they have the correct table before replying | |
2375 | */ | |
2376 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2377 | for (i = 0; i < num_vlan; i++) { | |
2378 | tt_vlan_req->vid = tt_vlan->vid; | |
2379 | tt_vlan_req->crc = tt_vlan->crc; | |
2380 | ||
2381 | tt_vlan_req++; | |
2382 | tt_vlan++; | |
2383 | } | |
a73105b8 AQ |
2384 | |
2385 | if (full_table) | |
335fbe0f | 2386 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2387 | |
bb351ba0 | 2388 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2389 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2390 | |
d69909d2 | 2391 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2392 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2393 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2394 | tvlv_tt_data, size); |
335fbe0f | 2395 | ret = true; |
a73105b8 AQ |
2396 | |
2397 | out: | |
a73105b8 | 2398 | if (primary_if) |
e5d89254 | 2399 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2400 | if (ret && tt_req_node) { |
807736f6 | 2401 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2402 | list_del(&tt_req_node->list); |
807736f6 | 2403 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2404 | kfree(tt_req_node); |
2405 | } | |
335fbe0f | 2406 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2407 | return ret; |
2408 | } | |
2409 | ||
335fbe0f ML |
2410 | /** |
2411 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2412 | * node's translation table | |
2413 | * @bat_priv: the bat priv with all the soft interface information | |
2414 | * @tt_data: tt data containing the tt request information | |
2415 | * @req_src: mac address of tt request sender | |
2416 | * @req_dst: mac address of tt request recipient | |
2417 | * | |
2418 | * Returns true if tt request reply was sent, false otherwise. | |
2419 | */ | |
2420 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2421 | struct batadv_tvlv_tt_data *tt_data, | |
2422 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2423 | { |
170173bf | 2424 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2425 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2426 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2427 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2428 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2429 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2430 | uint8_t orig_ttvn, req_ttvn; |
2431 | uint16_t tvlv_len; | |
2432 | int32_t tt_len; | |
a73105b8 | 2433 | |
39c75a51 | 2434 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2435 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2436 | req_src, tt_data->ttvn, req_dst, |
2437 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2438 | |
2439 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2440 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2441 | if (!req_dst_orig_node) |
2442 | goto out; | |
2443 | ||
335fbe0f | 2444 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2445 | if (!res_dst_orig_node) |
2446 | goto out; | |
2447 | ||
a73105b8 | 2448 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2449 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2450 | |
7ea7b4a1 | 2451 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2452 | /* this node doesn't have the requested data */ |
a73105b8 | 2453 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2454 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2455 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2456 | goto out; |
2457 | ||
015758d0 | 2458 | /* If the full table has been explicitly requested */ |
335fbe0f | 2459 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2460 | !req_dst_orig_node->tt_buff) |
2461 | full_table = true; | |
2462 | else | |
2463 | full_table = false; | |
2464 | ||
335fbe0f ML |
2465 | /* TT fragmentation hasn't been implemented yet, so send as many |
2466 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2467 | */ |
a73105b8 AQ |
2468 | if (!full_table) { |
2469 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2470 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2471 | |
7ea7b4a1 AQ |
2472 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2473 | &tvlv_tt_data, | |
2474 | &tt_change, | |
2475 | &tt_len); | |
2476 | if (!tt_len) | |
a73105b8 AQ |
2477 | goto unlock; |
2478 | ||
a73105b8 | 2479 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2480 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2481 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2482 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2483 | } else { | |
7ea7b4a1 AQ |
2484 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2485 | * in the initial part | |
2486 | */ | |
2487 | tt_len = -1; | |
2488 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2489 | &tvlv_tt_data, | |
2490 | &tt_change, | |
2491 | &tt_len); | |
2492 | if (!tt_len) | |
a73105b8 | 2493 | goto out; |
7ea7b4a1 AQ |
2494 | |
2495 | /* fill the rest of the tvlv with the real TT entries */ | |
2496 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2497 | tt_change, tt_len, | |
2498 | batadv_tt_global_valid, | |
2499 | req_dst_orig_node); | |
a73105b8 AQ |
2500 | } |
2501 | ||
a19d3d85 ML |
2502 | /* Don't send the response, if larger than fragmented packet. */ |
2503 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2504 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2505 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2506 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2507 | res_dst_orig_node->orig); | |
2508 | goto out; | |
2509 | } | |
2510 | ||
335fbe0f ML |
2511 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2512 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2513 | |
2514 | if (full_table) | |
335fbe0f | 2515 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2516 | |
39c75a51 | 2517 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2518 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2519 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2520 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2521 | |
d69909d2 | 2522 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2523 | |
335fbe0f | 2524 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2525 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2526 | tvlv_len); | |
e91ecfc6 | 2527 | |
335fbe0f | 2528 | ret = true; |
a73105b8 AQ |
2529 | goto out; |
2530 | ||
2531 | unlock: | |
2532 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2533 | ||
2534 | out: | |
2535 | if (res_dst_orig_node) | |
7d211efc | 2536 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2537 | if (req_dst_orig_node) |
7d211efc | 2538 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2539 | kfree(tvlv_tt_data); |
a73105b8 | 2540 | return ret; |
a73105b8 | 2541 | } |
96412690 | 2542 | |
335fbe0f ML |
2543 | /** |
2544 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2545 | * translation table | |
2546 | * @bat_priv: the bat priv with all the soft interface information | |
2547 | * @tt_data: tt data containing the tt request information | |
2548 | * @req_src: mac address of tt request sender | |
2549 | * | |
2550 | * Returns true if tt request reply was sent, false otherwise. | |
2551 | */ | |
2552 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2553 | struct batadv_tvlv_tt_data *tt_data, | |
2554 | uint8_t *req_src) | |
a73105b8 | 2555 | { |
335fbe0f | 2556 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2557 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2558 | struct batadv_tvlv_tt_change *tt_change; |
2559 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2560 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2561 | uint16_t tvlv_len; |
a73105b8 | 2562 | bool full_table; |
7ea7b4a1 | 2563 | int32_t tt_len; |
a73105b8 | 2564 | |
39c75a51 | 2565 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2566 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2567 | req_src, tt_data->ttvn, |
2568 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2569 | |
a70a9aa9 | 2570 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2571 | |
807736f6 | 2572 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2573 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2574 | |
335fbe0f | 2575 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2576 | if (!orig_node) |
2577 | goto out; | |
2578 | ||
e5d89254 | 2579 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2580 | if (!primary_if) |
2581 | goto out; | |
2582 | ||
2583 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2584 | * is too big send the whole local translation table |
2585 | */ | |
335fbe0f | 2586 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2587 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2588 | full_table = true; |
2589 | else | |
2590 | full_table = false; | |
2591 | ||
335fbe0f ML |
2592 | /* TT fragmentation hasn't been implemented yet, so send as many |
2593 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2594 | */ |
a73105b8 | 2595 | if (!full_table) { |
807736f6 | 2596 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2597 | |
7ea7b4a1 AQ |
2598 | tt_len = bat_priv->tt.last_changeset_len; |
2599 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2600 | &tvlv_tt_data, | |
2601 | &tt_change, | |
2602 | &tt_len); | |
2603 | if (!tt_len) | |
a73105b8 AQ |
2604 | goto unlock; |
2605 | ||
335fbe0f | 2606 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2607 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2608 | bat_priv->tt.last_changeset_len); |
2609 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2610 | } else { |
335fbe0f ML |
2611 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2612 | ||
7ea7b4a1 AQ |
2613 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2614 | * in the initial part | |
2615 | */ | |
2616 | tt_len = -1; | |
2617 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2618 | &tvlv_tt_data, | |
2619 | &tt_change, | |
2620 | &tt_len); | |
2621 | if (!tt_len) | |
a73105b8 | 2622 | goto out; |
7ea7b4a1 AQ |
2623 | |
2624 | /* fill the rest of the tvlv with the real TT entries */ | |
2625 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2626 | tt_change, tt_len, | |
2627 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2628 | } |
2629 | ||
335fbe0f ML |
2630 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2631 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2632 | |
2633 | if (full_table) | |
335fbe0f | 2634 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2635 | |
39c75a51 | 2636 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2637 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2638 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2639 | |
d69909d2 | 2640 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2641 | |
335fbe0f | 2642 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2643 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2644 | tvlv_len); | |
335fbe0f | 2645 | |
a73105b8 AQ |
2646 | goto out; |
2647 | ||
2648 | unlock: | |
807736f6 | 2649 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2650 | out: |
a70a9aa9 | 2651 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2652 | if (orig_node) |
7d211efc | 2653 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2654 | if (primary_if) |
e5d89254 | 2655 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2656 | kfree(tvlv_tt_data); |
2657 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2658 | return true; |
2659 | } | |
2660 | ||
335fbe0f ML |
2661 | /** |
2662 | * batadv_send_tt_response - send reply to tt request | |
2663 | * @bat_priv: the bat priv with all the soft interface information | |
2664 | * @tt_data: tt data containing the tt request information | |
2665 | * @req_src: mac address of tt request sender | |
2666 | * @req_dst: mac address of tt request recipient | |
2667 | * | |
2668 | * Returns true if tt request reply was sent, false otherwise. | |
2669 | */ | |
2670 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2671 | struct batadv_tvlv_tt_data *tt_data, | |
2672 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2673 | { |
cfd4f757 | 2674 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2675 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2676 | else |
335fbe0f ML |
2677 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2678 | req_src, req_dst); | |
a73105b8 AQ |
2679 | } |
2680 | ||
56303d34 SE |
2681 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2682 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2683 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2684 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2685 | { |
2686 | int i; | |
a513088d | 2687 | int roams; |
a73105b8 AQ |
2688 | |
2689 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2690 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2691 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2692 | batadv_tt_global_del(bat_priv, orig_node, |
2693 | (tt_change + i)->addr, | |
c018ad3d | 2694 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2695 | "tt removed by changes", |
2696 | roams); | |
08c36d3e | 2697 | } else { |
08c36d3e | 2698 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2699 | (tt_change + i)->addr, |
c018ad3d | 2700 | ntohs((tt_change + i)->vid), |
d4f44692 | 2701 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2702 | /* In case of problem while storing a |
2703 | * global_entry, we stop the updating | |
2704 | * procedure without committing the | |
2705 | * ttvn change. This will avoid to send | |
2706 | * corrupted data on tt_request | |
2707 | */ | |
2708 | return; | |
08c36d3e | 2709 | } |
a73105b8 | 2710 | } |
17071578 | 2711 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2712 | } |
2713 | ||
56303d34 | 2714 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2715 | struct batadv_tvlv_tt_change *tt_change, |
2716 | uint8_t ttvn, uint8_t *resp_src, | |
2717 | uint16_t num_entries) | |
a73105b8 | 2718 | { |
170173bf | 2719 | struct batadv_orig_node *orig_node; |
a73105b8 | 2720 | |
335fbe0f | 2721 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2722 | if (!orig_node) |
2723 | goto out; | |
2724 | ||
2725 | /* Purge the old table first.. */ | |
95fb130d AQ |
2726 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2727 | "Received full table"); | |
a73105b8 | 2728 | |
7ea7b4a1 AQ |
2729 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2730 | ttvn); | |
a73105b8 AQ |
2731 | |
2732 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2733 | kfree(orig_node->tt_buff); | |
2734 | orig_node->tt_buff_len = 0; | |
2735 | orig_node->tt_buff = NULL; | |
2736 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2737 | ||
7ea7b4a1 | 2738 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2739 | |
2740 | out: | |
2741 | if (orig_node) | |
7d211efc | 2742 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2743 | } |
2744 | ||
56303d34 SE |
2745 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2746 | struct batadv_orig_node *orig_node, | |
a513088d | 2747 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2748 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2749 | { |
a513088d SE |
2750 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2751 | tt_num_changes, ttvn); | |
a73105b8 | 2752 | |
e8cf234a AQ |
2753 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2754 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2755 | atomic_set(&orig_node->last_ttvn, ttvn); |
2756 | } | |
2757 | ||
c018ad3d AQ |
2758 | /** |
2759 | * batadv_is_my_client - check if a client is served by the local node | |
2760 | * @bat_priv: the bat priv with all the soft interface information | |
2761 | * @addr: the mac adress of the client to check | |
2762 | * @vid: VLAN identifier | |
2763 | * | |
2764 | * Returns true if the client is served by this node, false otherwise. | |
2765 | */ | |
2766 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2767 | unsigned short vid) | |
a73105b8 | 2768 | { |
170173bf | 2769 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2770 | bool ret = false; |
a73105b8 | 2771 | |
c018ad3d | 2772 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2773 | if (!tt_local_entry) |
2774 | goto out; | |
058d0e26 | 2775 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2776 | * consistency purpose) |
2777 | */ | |
7c1fd91d AQ |
2778 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2779 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2780 | goto out; |
7683fdc1 AQ |
2781 | ret = true; |
2782 | out: | |
a73105b8 | 2783 | if (tt_local_entry) |
a513088d | 2784 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2785 | return ret; |
a73105b8 AQ |
2786 | } |
2787 | ||
335fbe0f ML |
2788 | /** |
2789 | * batadv_handle_tt_response - process incoming tt reply | |
2790 | * @bat_priv: the bat priv with all the soft interface information | |
2791 | * @tt_data: tt data containing the tt request information | |
2792 | * @resp_src: mac address of tt reply sender | |
2793 | * @num_entries: number of tt change entries appended to the tt data | |
2794 | */ | |
2795 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2796 | struct batadv_tvlv_tt_data *tt_data, | |
2797 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2798 | { |
56303d34 SE |
2799 | struct batadv_tt_req_node *node, *safe; |
2800 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2801 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2802 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2803 | uint16_t change_offset; | |
a73105b8 | 2804 | |
39c75a51 | 2805 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2806 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2807 | resp_src, tt_data->ttvn, num_entries, |
2808 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2809 | |
335fbe0f | 2810 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2811 | if (!orig_node) |
2812 | goto out; | |
2813 | ||
a70a9aa9 AQ |
2814 | spin_lock_bh(&orig_node->tt_lock); |
2815 | ||
7ea7b4a1 AQ |
2816 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2817 | change_offset *= ntohs(tt_data->num_vlan); | |
2818 | change_offset += sizeof(*tt_data); | |
2819 | tvlv_ptr += change_offset; | |
2820 | ||
2821 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2822 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2823 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2824 | resp_src, num_entries); | |
96412690 | 2825 | } else { |
335fbe0f ML |
2826 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2827 | tt_data->ttvn, tt_change); | |
96412690 | 2828 | } |
a73105b8 | 2829 | |
a70a9aa9 | 2830 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2831 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2832 | |
2833 | spin_unlock_bh(&orig_node->tt_lock); | |
2834 | ||
a73105b8 | 2835 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2836 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2837 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2838 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2839 | continue; |
2840 | list_del(&node->list); | |
2841 | kfree(node); | |
2842 | } | |
7ea7b4a1 | 2843 | |
807736f6 | 2844 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2845 | out: |
2846 | if (orig_node) | |
7d211efc | 2847 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2848 | } |
2849 | ||
56303d34 | 2850 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2851 | { |
56303d34 | 2852 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2853 | |
807736f6 | 2854 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2855 | |
807736f6 | 2856 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2857 | list_del(&node->list); |
2858 | kfree(node); | |
2859 | } | |
2860 | ||
807736f6 | 2861 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2862 | } |
2863 | ||
56303d34 | 2864 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2865 | { |
56303d34 | 2866 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2867 | |
807736f6 SE |
2868 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2869 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2870 | if (!batadv_has_timed_out(node->first_time, |
2871 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2872 | continue; |
2873 | ||
2874 | list_del(&node->list); | |
2875 | kfree(node); | |
2876 | } | |
807736f6 | 2877 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2878 | } |
2879 | ||
2880 | /* This function checks whether the client already reached the | |
2881 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2882 | * will not be sent. | |
2883 | * | |
9cfc7bd6 SE |
2884 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2885 | */ | |
56303d34 | 2886 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2887 | uint8_t *client) |
cc47f66e | 2888 | { |
56303d34 | 2889 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2890 | bool ret = false; |
2891 | ||
807736f6 | 2892 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2893 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2894 | * reply from the same orig_node yet |
2895 | */ | |
807736f6 | 2896 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2897 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2898 | continue; |
2899 | ||
1eda58bf | 2900 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2901 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2902 | continue; |
2903 | ||
3e34819e | 2904 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2905 | /* Sorry, you roamed too many times! */ |
2906 | goto unlock; | |
2907 | ret = true; | |
2908 | break; | |
2909 | } | |
2910 | ||
2911 | if (!ret) { | |
2912 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2913 | if (!tt_roam_node) | |
2914 | goto unlock; | |
2915 | ||
2916 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2917 | atomic_set(&tt_roam_node->counter, |
2918 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2919 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2920 | ||
807736f6 | 2921 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2922 | ret = true; |
2923 | } | |
2924 | ||
2925 | unlock: | |
807736f6 | 2926 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2927 | return ret; |
2928 | } | |
2929 | ||
c018ad3d AQ |
2930 | /** |
2931 | * batadv_send_roam_adv - send a roaming advertisement message | |
2932 | * @bat_priv: the bat priv with all the soft interface information | |
2933 | * @client: mac address of the roaming client | |
2934 | * @vid: VLAN identifier | |
2935 | * @orig_node: message destination | |
2936 | * | |
2937 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2938 | * client. This is done to inform the node that from now on all traffic destined | |
2939 | * for this particular roamed client has to be forwarded to the sender of the | |
2940 | * roaming message. | |
2941 | */ | |
56303d34 | 2942 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2943 | unsigned short vid, |
56303d34 | 2944 | struct batadv_orig_node *orig_node) |
cc47f66e | 2945 | { |
56303d34 | 2946 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2947 | struct batadv_tvlv_roam_adv tvlv_roam; |
2948 | ||
2949 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2950 | if (!primary_if) | |
2951 | goto out; | |
cc47f66e AQ |
2952 | |
2953 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2954 | * already roamed to us too many times |
2955 | */ | |
a513088d | 2956 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2957 | goto out; |
2958 | ||
39c75a51 | 2959 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2960 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2961 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2962 | |
d69909d2 | 2963 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2964 | |
122edaa0 | 2965 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2966 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2967 | |
2968 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2969 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2970 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2971 | |
2972 | out: | |
122edaa0 ML |
2973 | if (primary_if) |
2974 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2975 | } |
2976 | ||
a513088d | 2977 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2978 | { |
56303d34 | 2979 | struct delayed_work *delayed_work; |
807736f6 | 2980 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2981 | struct batadv_priv *bat_priv; |
2982 | ||
2983 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2984 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2985 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2986 | |
a19d3d85 | 2987 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 2988 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2989 | batadv_tt_req_purge(bat_priv); |
2990 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2991 | |
72414442 AQ |
2992 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2993 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2994 | } |
cc47f66e | 2995 | |
56303d34 | 2996 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2997 | { |
e1bf0c14 ML |
2998 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2999 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3000 | ||
807736f6 | 3001 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3002 | |
a513088d SE |
3003 | batadv_tt_local_table_free(bat_priv); |
3004 | batadv_tt_global_table_free(bat_priv); | |
3005 | batadv_tt_req_list_free(bat_priv); | |
3006 | batadv_tt_changes_list_free(bat_priv); | |
3007 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3008 | |
807736f6 | 3009 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3010 | } |
058d0e26 | 3011 | |
7ea7b4a1 AQ |
3012 | /** |
3013 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3014 | * table and possibly count them in the TT size | |
3015 | * @bat_priv: the bat priv with all the soft interface information | |
3016 | * @flags: the flag to switch | |
3017 | * @enable: whether to set or unset the flag | |
3018 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3019 | */ |
7ea7b4a1 AQ |
3020 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3021 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3022 | { |
7ea7b4a1 AQ |
3023 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3024 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3025 | uint16_t changed_num = 0; |
058d0e26 | 3026 | struct hlist_head *head; |
7ea7b4a1 | 3027 | uint32_t i; |
058d0e26 AQ |
3028 | |
3029 | if (!hash) | |
7ea7b4a1 | 3030 | return; |
058d0e26 AQ |
3031 | |
3032 | for (i = 0; i < hash->size; i++) { | |
3033 | head = &hash->table[i]; | |
3034 | ||
3035 | rcu_read_lock(); | |
b67bfe0d | 3036 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3037 | head, hash_entry) { |
697f2531 AQ |
3038 | if (enable) { |
3039 | if ((tt_common_entry->flags & flags) == flags) | |
3040 | continue; | |
3041 | tt_common_entry->flags |= flags; | |
3042 | } else { | |
3043 | if (!(tt_common_entry->flags & flags)) | |
3044 | continue; | |
3045 | tt_common_entry->flags &= ~flags; | |
3046 | } | |
3047 | changed_num++; | |
7ea7b4a1 AQ |
3048 | |
3049 | if (!count) | |
3050 | continue; | |
3051 | ||
3052 | batadv_tt_local_size_inc(bat_priv, | |
3053 | tt_common_entry->vid); | |
058d0e26 AQ |
3054 | } |
3055 | rcu_read_unlock(); | |
3056 | } | |
058d0e26 AQ |
3057 | } |
3058 | ||
acd34afa | 3059 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3060 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3061 | { |
807736f6 | 3062 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3063 | struct batadv_tt_common_entry *tt_common; |
3064 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3065 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3066 | struct hlist_head *head; |
3067 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3068 | uint32_t i; |
058d0e26 AQ |
3069 | |
3070 | if (!hash) | |
3071 | return; | |
3072 | ||
3073 | for (i = 0; i < hash->size; i++) { | |
3074 | head = &hash->table[i]; | |
3075 | list_lock = &hash->list_locks[i]; | |
3076 | ||
3077 | spin_lock_bh(list_lock); | |
b67bfe0d | 3078 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3079 | hash_entry) { |
3080 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3081 | continue; |
3082 | ||
39c75a51 | 3083 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3084 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3085 | tt_common->addr, | |
3086 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3087 | |
7ea7b4a1 | 3088 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3089 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3090 | tt_local = container_of(tt_common, |
3091 | struct batadv_tt_local_entry, | |
3092 | common); | |
3093 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
3094 | } |
3095 | spin_unlock_bh(list_lock); | |
3096 | } | |
058d0e26 AQ |
3097 | } |
3098 | ||
e1bf0c14 | 3099 | /** |
a19d3d85 ML |
3100 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3101 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3102 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3103 | * |
3104 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3105 | */ |
a19d3d85 | 3106 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3107 | { |
e1bf0c14 ML |
3108 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3109 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3110 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3111 | return; |
e1bf0c14 | 3112 | } |
be9aa4c1 | 3113 | |
7ea7b4a1 | 3114 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3115 | |
a513088d | 3116 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3117 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3118 | |
3119 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3120 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3121 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3122 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3123 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3124 | |
3125 | /* reset the sending counter */ | |
807736f6 | 3126 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3127 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3128 | } |
a70a9aa9 | 3129 | |
a19d3d85 ML |
3130 | /** |
3131 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3132 | * have been queued in the time since the last commit | |
3133 | * @bat_priv: the bat priv with all the soft interface information | |
3134 | */ | |
3135 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3136 | { | |
3137 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3138 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3139 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3140 | } |
59b699cd | 3141 | |
56303d34 | 3142 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3143 | uint8_t *dst, unsigned short vid) |
59b699cd | 3144 | { |
56303d34 SE |
3145 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3146 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3147 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3148 | bool ret = false; |
59b699cd | 3149 | |
b8cbd81d AQ |
3150 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3151 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3152 | goto out; |
59b699cd | 3153 | |
b8cbd81d | 3154 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3155 | if (!tt_local_entry) |
3156 | goto out; | |
3157 | ||
b8cbd81d | 3158 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3159 | if (!tt_global_entry) |
3160 | goto out; | |
3161 | ||
1f129fef | 3162 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3163 | goto out; |
3164 | ||
5870adc6 | 3165 | ret = true; |
59b699cd AQ |
3166 | |
3167 | out: | |
b8cbd81d AQ |
3168 | if (vlan) |
3169 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3170 | if (tt_global_entry) |
a513088d | 3171 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3172 | if (tt_local_entry) |
a513088d | 3173 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3174 | return ret; |
3175 | } | |
a943cac1 | 3176 | |
e1bf0c14 ML |
3177 | /** |
3178 | * batadv_tt_update_orig - update global translation table with new tt | |
3179 | * information received via ogms | |
3180 | * @bat_priv: the bat priv with all the soft interface information | |
3181 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3182 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3183 | * @tt_num_vlan: number of tvlv VLAN entries | |
3184 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3185 | * @tt_num_changes: number of tt changes inside the tt buffer |
3186 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3187 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3188 | */ |
3189 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3190 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3191 | const void *tt_buff, uint16_t tt_num_vlan, |
3192 | struct batadv_tvlv_tt_change *tt_change, | |
3193 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3194 | { |
3195 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3196 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 ML |
3197 | bool full_table = true; |
3198 | ||
7ea7b4a1 | 3199 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
17071578 | 3200 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3201 | * increased by one -> we can apply the attached changes |
3202 | */ | |
17071578 AQ |
3203 | if ((!orig_node->tt_initialised && ttvn == 1) || |
3204 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 3205 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3206 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3207 | * times. | |
9cfc7bd6 SE |
3208 | * In this case send a tt request |
3209 | */ | |
a943cac1 ML |
3210 | if (!tt_num_changes) { |
3211 | full_table = false; | |
3212 | goto request_table; | |
3213 | } | |
3214 | ||
a70a9aa9 AQ |
3215 | spin_lock_bh(&orig_node->tt_lock); |
3216 | ||
335fbe0f | 3217 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 3218 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3219 | ttvn, tt_change); |
a943cac1 ML |
3220 | |
3221 | /* Even if we received the precomputed crc with the OGM, we | |
3222 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3223 | * in the global table |
3224 | */ | |
7ea7b4a1 | 3225 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3226 | |
a70a9aa9 AQ |
3227 | spin_unlock_bh(&orig_node->tt_lock); |
3228 | ||
a943cac1 ML |
3229 | /* The ttvn alone is not enough to guarantee consistency |
3230 | * because a single value could represent different states | |
3231 | * (due to the wrap around). Thus a node has to check whether | |
3232 | * the resulting table (after applying the changes) is still | |
3233 | * consistent or not. E.g. a node could disconnect while its | |
3234 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3235 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3236 | * inconsistency |
3237 | */ | |
7ea7b4a1 AQ |
3238 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3239 | tt_num_vlan)) | |
a943cac1 | 3240 | goto request_table; |
a943cac1 ML |
3241 | } else { |
3242 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3243 | * in sync anymore -> request fresh tt data |
3244 | */ | |
17071578 | 3245 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3246 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3247 | tt_num_vlan)) { | |
a943cac1 | 3248 | request_table: |
39c75a51 | 3249 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3250 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3251 | orig_node->orig, ttvn, orig_ttvn, | |
3252 | tt_num_changes); | |
a513088d | 3253 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3254 | tt_vlan, tt_num_vlan, |
3255 | full_table); | |
a943cac1 ML |
3256 | return; |
3257 | } | |
3258 | } | |
3259 | } | |
3275e7cc | 3260 | |
c018ad3d AQ |
3261 | /** |
3262 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3263 | * @bat_priv: the bat priv with all the soft interface information | |
3264 | * @addr: the mac address of the client to check | |
3265 | * @vid: VLAN identifier | |
3266 | * | |
3267 | * Returns true if we know that the client has moved from its old originator | |
3268 | * to another one. This entry is still kept for consistency purposes and will be | |
3269 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3270 | */ |
56303d34 | 3271 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3272 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3273 | { |
56303d34 | 3274 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3275 | bool ret = false; |
3276 | ||
c018ad3d | 3277 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3278 | if (!tt_global_entry) |
3279 | goto out; | |
3280 | ||
c1d07431 | 3281 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3282 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3283 | out: |
3284 | return ret; | |
3285 | } | |
30cfd02b | 3286 | |
7c1fd91d AQ |
3287 | /** |
3288 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3289 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3290 | * @addr: the mac address of the local client to query |
3291 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3292 | * |
3293 | * Returns true if the local client is known to be roaming (it is not served by | |
3294 | * this node anymore) or not. If yes, the client is still present in the table | |
3295 | * to keep the latter consistent with the node TTVN | |
3296 | */ | |
3297 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3298 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3299 | { |
3300 | struct batadv_tt_local_entry *tt_local_entry; | |
3301 | bool ret = false; | |
3302 | ||
c018ad3d | 3303 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3304 | if (!tt_local_entry) |
3305 | goto out; | |
3306 | ||
3307 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3308 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3309 | out: | |
3310 | return ret; | |
7c1fd91d AQ |
3311 | } |
3312 | ||
30cfd02b AQ |
3313 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3314 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3315 | const unsigned char *addr, |
16052789 | 3316 | unsigned short vid) |
30cfd02b AQ |
3317 | { |
3318 | bool ret = false; | |
3319 | ||
16052789 | 3320 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3321 | BATADV_TT_CLIENT_TEMP, |
3322 | atomic_read(&orig_node->last_ttvn))) | |
3323 | goto out; | |
3324 | ||
3325 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3326 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3327 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3328 | ret = true; |
3329 | out: | |
3330 | return ret; | |
3331 | } | |
e1bf0c14 | 3332 | |
a19d3d85 ML |
3333 | /** |
3334 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3335 | * maximum packet size that can be transported through the mesh | |
3336 | * @soft_iface: netdev struct of the mesh interface | |
3337 | * | |
3338 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3339 | * to be removed. | |
3340 | */ | |
3341 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3342 | { | |
3343 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3344 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3345 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3346 | bool reduced = false; | |
3347 | ||
3348 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3349 | ||
3350 | while (true) { | |
3351 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3352 | if (packet_size_max >= table_size) | |
3353 | break; | |
3354 | ||
3355 | batadv_tt_local_purge(bat_priv, timeout); | |
3356 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3357 | ||
3358 | timeout /= 2; | |
3359 | reduced = true; | |
3360 | net_ratelimited_function(batadv_info, soft_iface, | |
3361 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3362 | packet_size_max); | |
3363 | } | |
3364 | ||
3365 | /* commit these changes immediately, to avoid synchronization problem | |
3366 | * with the TTVN | |
3367 | */ | |
3368 | if (reduced) | |
3369 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3370 | ||
3371 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3372 | } | |
3373 | ||
e1bf0c14 ML |
3374 | /** |
3375 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3376 | * @bat_priv: the bat priv with all the soft interface information | |
3377 | * @orig: the orig_node of the ogm | |
3378 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3379 | * @tvlv_value: tvlv buffer containing the gateway data | |
3380 | * @tvlv_value_len: tvlv buffer length | |
3381 | */ | |
3382 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3383 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3384 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3385 | uint16_t tvlv_value_len) |
3386 | { | |
7ea7b4a1 AQ |
3387 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3388 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3389 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3390 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3391 | |
3392 | if (tvlv_value_len < sizeof(*tt_data)) | |
3393 | return; | |
3394 | ||
3395 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3396 | tvlv_value_len -= sizeof(*tt_data); | |
3397 | ||
7ea7b4a1 AQ |
3398 | num_vlan = ntohs(tt_data->num_vlan); |
3399 | ||
3400 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3401 | return; | |
3402 | ||
3403 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3404 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3405 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3406 | ||
298e6e68 | 3407 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3408 | |
7ea7b4a1 AQ |
3409 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3410 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3411 | } |
3412 | ||
335fbe0f ML |
3413 | /** |
3414 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3415 | * container | |
3416 | * @bat_priv: the bat priv with all the soft interface information | |
3417 | * @src: mac address of tt tvlv sender | |
3418 | * @dst: mac address of tt tvlv recipient | |
3419 | * @tvlv_value: tvlv buffer containing the tt data | |
3420 | * @tvlv_value_len: tvlv buffer length | |
3421 | * | |
3422 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3423 | * otherwise. | |
3424 | */ | |
3425 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3426 | uint8_t *src, uint8_t *dst, | |
3427 | void *tvlv_value, | |
3428 | uint16_t tvlv_value_len) | |
3429 | { | |
3430 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3431 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3432 | char tt_flag; |
3433 | bool ret; | |
3434 | ||
3435 | if (tvlv_value_len < sizeof(*tt_data)) | |
3436 | return NET_RX_SUCCESS; | |
3437 | ||
3438 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3439 | tvlv_value_len -= sizeof(*tt_data); | |
3440 | ||
7ea7b4a1 AQ |
3441 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3442 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3443 | ||
3444 | if (tvlv_value_len < tt_vlan_len) | |
3445 | return NET_RX_SUCCESS; | |
3446 | ||
3447 | tvlv_value_len -= tt_vlan_len; | |
3448 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3449 | |
3450 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3451 | case BATADV_TT_REQUEST: | |
3452 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3453 | ||
3454 | /* If this node cannot provide a TT response the tt_request is | |
3455 | * forwarded | |
3456 | */ | |
3457 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3458 | if (!ret) { | |
3459 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3460 | tt_flag = 'F'; | |
3461 | else | |
3462 | tt_flag = '.'; | |
3463 | ||
3464 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3465 | "Routing TT_REQUEST to %pM [%c]\n", | |
3466 | dst, tt_flag); | |
3467 | /* tvlv API will re-route the packet */ | |
3468 | return NET_RX_DROP; | |
3469 | } | |
3470 | break; | |
3471 | case BATADV_TT_RESPONSE: | |
3472 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3473 | ||
3474 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3475 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3476 | src, tt_num_entries); |
335fbe0f ML |
3477 | return NET_RX_SUCCESS; |
3478 | } | |
3479 | ||
3480 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3481 | tt_flag = 'F'; | |
3482 | else | |
3483 | tt_flag = '.'; | |
3484 | ||
3485 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3486 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3487 | ||
3488 | /* tvlv API will re-route the packet */ | |
3489 | return NET_RX_DROP; | |
3490 | } | |
3491 | ||
3492 | return NET_RX_SUCCESS; | |
3493 | } | |
3494 | ||
122edaa0 ML |
3495 | /** |
3496 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3497 | * @bat_priv: the bat priv with all the soft interface information | |
3498 | * @src: mac address of tt tvlv sender | |
3499 | * @dst: mac address of tt tvlv recipient | |
3500 | * @tvlv_value: tvlv buffer containing the tt data | |
3501 | * @tvlv_value_len: tvlv buffer length | |
3502 | * | |
3503 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3504 | * otherwise. | |
3505 | */ | |
3506 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3507 | uint8_t *src, uint8_t *dst, | |
3508 | void *tvlv_value, | |
3509 | uint16_t tvlv_value_len) | |
3510 | { | |
3511 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3512 | struct batadv_orig_node *orig_node = NULL; | |
3513 | ||
3514 | /* If this node is not the intended recipient of the | |
3515 | * roaming advertisement the packet is forwarded | |
3516 | * (the tvlv API will re-route the packet). | |
3517 | */ | |
3518 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3519 | return NET_RX_DROP; | |
3520 | ||
122edaa0 ML |
3521 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3522 | goto out; | |
3523 | ||
3524 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3525 | if (!orig_node) | |
3526 | goto out; | |
3527 | ||
3528 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3529 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3530 | ||
3531 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3532 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3533 | src, roaming_adv->client); | |
3534 | ||
3535 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3536 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3537 | atomic_read(&orig_node->last_ttvn) + 1); |
3538 | ||
3539 | out: | |
3540 | if (orig_node) | |
3541 | batadv_orig_node_free_ref(orig_node); | |
3542 | return NET_RX_SUCCESS; | |
3543 | } | |
3544 | ||
e1bf0c14 ML |
3545 | /** |
3546 | * batadv_tt_init - initialise the translation table internals | |
3547 | * @bat_priv: the bat priv with all the soft interface information | |
3548 | * | |
3549 | * Return 0 on success or negative error number in case of failure. | |
3550 | */ | |
3551 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3552 | { | |
3553 | int ret; | |
3554 | ||
0eb01568 AQ |
3555 | /* synchronized flags must be remote */ |
3556 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3557 | ||
e1bf0c14 ML |
3558 | ret = batadv_tt_local_init(bat_priv); |
3559 | if (ret < 0) | |
3560 | return ret; | |
3561 | ||
3562 | ret = batadv_tt_global_init(bat_priv); | |
3563 | if (ret < 0) | |
3564 | return ret; | |
3565 | ||
3566 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3567 | batadv_tt_tvlv_unicast_handler_v1, |
3568 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3569 | |
122edaa0 ML |
3570 | batadv_tvlv_handler_register(bat_priv, NULL, |
3571 | batadv_roam_tvlv_unicast_handler_v1, | |
3572 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3573 | ||
e1bf0c14 ML |
3574 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3575 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3576 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3577 | ||
3578 | return 1; | |
3579 | } |