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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
ced72933 | 30 | #include <linux/crc32c.h> |
a73105b8 | 31 | |
dec05074 AQ |
32 | /* hash class keys */ |
33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
35 | ||
56303d34 | 36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 37 | unsigned short vid, |
56303d34 | 38 | struct batadv_orig_node *orig_node); |
a513088d SE |
39 | static void batadv_tt_purge(struct work_struct *work); |
40 | static void | |
56303d34 | 41 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
42 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
43 | struct batadv_orig_node *orig_node, | |
44 | const unsigned char *addr, | |
c018ad3d AQ |
45 | unsigned short vid, const char *message, |
46 | bool roaming); | |
c6c8fea2 | 47 | |
7aadf889 | 48 | /* returns 1 if they are the same mac addr */ |
a513088d | 49 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 50 | { |
56303d34 | 51 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 52 | hash_entry); |
7aadf889 ML |
53 | |
54 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
55 | } | |
56 | ||
c018ad3d AQ |
57 | /** |
58 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
59 | * @data: pointer to the tt_common_entry object to map | |
60 | * @size: the size of the hash table | |
61 | * | |
62 | * Returns the hash index where the object represented by 'data' should be | |
63 | * stored at. | |
64 | */ | |
65 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
66 | { | |
67 | struct batadv_tt_common_entry *tt; | |
68 | uint32_t hash = 0; | |
69 | ||
70 | tt = (struct batadv_tt_common_entry *)data; | |
71 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
72 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
73 | ||
74 | hash += (hash << 3); | |
75 | hash ^= (hash >> 11); | |
76 | hash += (hash << 15); | |
77 | ||
78 | return hash % size; | |
79 | } | |
80 | ||
81 | /** | |
82 | * batadv_tt_hash_find - look for a client in the given hash table | |
83 | * @hash: the hash table to search | |
84 | * @addr: the mac address of the client to look for | |
85 | * @vid: VLAN identifier | |
86 | * | |
87 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
88 | * found, NULL otherwise. | |
89 | */ | |
56303d34 | 90 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
91 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
92 | unsigned short vid) | |
7aadf889 | 93 | { |
7aadf889 | 94 | struct hlist_head *head; |
c018ad3d | 95 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 96 | uint32_t index; |
7aadf889 ML |
97 | |
98 | if (!hash) | |
99 | return NULL; | |
100 | ||
c018ad3d AQ |
101 | memcpy(to_search.addr, addr, ETH_ALEN); |
102 | to_search.vid = vid; | |
103 | ||
104 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
105 | head = &hash->table[index]; |
106 | ||
107 | rcu_read_lock(); | |
c018ad3d AQ |
108 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
109 | if (!batadv_compare_eth(tt, addr)) | |
110 | continue; | |
111 | ||
112 | if (tt->vid != vid) | |
7aadf889 ML |
113 | continue; |
114 | ||
c018ad3d | 115 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
116 | continue; |
117 | ||
c018ad3d | 118 | tt_tmp = tt; |
7aadf889 ML |
119 | break; |
120 | } | |
121 | rcu_read_unlock(); | |
122 | ||
c018ad3d | 123 | return tt_tmp; |
7aadf889 ML |
124 | } |
125 | ||
c018ad3d AQ |
126 | /** |
127 | * batadv_tt_local_hash_find - search the local table for a given client | |
128 | * @bat_priv: the bat priv with all the soft interface information | |
129 | * @addr: the mac address of the client to look for | |
130 | * @vid: VLAN identifier | |
131 | * | |
132 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
133 | * found, NULL otherwise. | |
134 | */ | |
56303d34 | 135 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
136 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
137 | unsigned short vid) | |
7aadf889 | 138 | { |
56303d34 SE |
139 | struct batadv_tt_common_entry *tt_common_entry; |
140 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 141 | |
c018ad3d AQ |
142 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
143 | vid); | |
48100bac AQ |
144 | if (tt_common_entry) |
145 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
146 | struct batadv_tt_local_entry, |
147 | common); | |
48100bac AQ |
148 | return tt_local_entry; |
149 | } | |
7aadf889 | 150 | |
c018ad3d AQ |
151 | /** |
152 | * batadv_tt_global_hash_find - search the global table for a given client | |
153 | * @bat_priv: the bat priv with all the soft interface information | |
154 | * @addr: the mac address of the client to look for | |
155 | * @vid: VLAN identifier | |
156 | * | |
157 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
158 | * is found, NULL otherwise. | |
159 | */ | |
56303d34 | 160 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
161 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
162 | unsigned short vid) | |
48100bac | 163 | { |
56303d34 SE |
164 | struct batadv_tt_common_entry *tt_common_entry; |
165 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 166 | |
c018ad3d AQ |
167 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
168 | vid); | |
48100bac AQ |
169 | if (tt_common_entry) |
170 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
171 | struct batadv_tt_global_entry, |
172 | common); | |
48100bac | 173 | return tt_global_entry; |
7aadf889 ML |
174 | } |
175 | ||
a513088d | 176 | static void |
56303d34 | 177 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 178 | { |
48100bac AQ |
179 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
180 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
181 | } |
182 | ||
21026059 AQ |
183 | /** |
184 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
185 | * tt_global_entry and possibly free it | |
186 | * @tt_global_entry: the object to free | |
187 | */ | |
a513088d | 188 | static void |
56303d34 | 189 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 190 | { |
db08e6e5 | 191 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 192 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 193 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
194 | } |
195 | } | |
196 | ||
a513088d | 197 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 198 | { |
56303d34 | 199 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 200 | |
56303d34 | 201 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
202 | |
203 | /* We are in an rcu callback here, therefore we cannot use | |
204 | * batadv_orig_node_free_ref() and its call_rcu(): | |
205 | * An rcu_barrier() wouldn't wait for that to finish | |
206 | */ | |
207 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
208 | kfree(orig_entry); |
209 | } | |
210 | ||
7ea7b4a1 AQ |
211 | /** |
212 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
213 | * by vid | |
214 | * @bat_priv: the bat priv with all the soft interface information | |
215 | * @vid: the VLAN identifier of the sub-table to change | |
216 | * @v: the amount to sum to the local table size | |
217 | */ | |
218 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
219 | unsigned short vid, int v) | |
220 | { | |
221 | struct batadv_softif_vlan *vlan; | |
222 | ||
223 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
224 | if (!vlan) | |
225 | return; | |
226 | ||
227 | atomic_add(v, &vlan->tt.num_entries); | |
228 | ||
229 | batadv_softif_vlan_free_ref(vlan); | |
230 | } | |
231 | ||
232 | /** | |
233 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
234 | * vid | |
235 | * @bat_priv: the bat priv with all the soft interface information | |
236 | * @vid: the VLAN identifier | |
237 | */ | |
238 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
239 | unsigned short vid) | |
240 | { | |
241 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
242 | } | |
243 | ||
244 | /** | |
245 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
246 | * vid | |
247 | * @bat_priv: the bat priv with all the soft interface information | |
248 | * @vid: the VLAN identifier | |
249 | */ | |
250 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
251 | unsigned short vid) | |
252 | { | |
253 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
254 | } | |
255 | ||
256 | /** | |
257 | * batadv_tt_global_size_mod - change the size by v of the local table | |
258 | * identified by vid | |
259 | * @bat_priv: the bat priv with all the soft interface information | |
260 | * @vid: the VLAN identifier | |
261 | * @v: the amount to sum to the global table size | |
262 | */ | |
263 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
264 | unsigned short vid, int v) | |
265 | { | |
266 | struct batadv_orig_node_vlan *vlan; | |
267 | ||
268 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
269 | if (!vlan) | |
270 | return; | |
271 | ||
272 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
273 | spin_lock_bh(&orig_node->vlan_list_lock); | |
274 | list_del_rcu(&vlan->list); | |
275 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
276 | batadv_orig_node_vlan_free_ref(vlan); | |
277 | } | |
278 | ||
279 | batadv_orig_node_vlan_free_ref(vlan); | |
280 | } | |
281 | ||
282 | /** | |
283 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
284 | * given vid | |
285 | * @orig_node: the originator which global table size has to be decreased | |
286 | * @vid: the vlan identifier | |
287 | */ | |
288 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
289 | unsigned short vid) | |
290 | { | |
291 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
292 | } | |
293 | ||
294 | /** | |
295 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
296 | * given vid | |
297 | * @orig_node: the originator which global table size has to be decreased | |
298 | * @vid: the vlan identifier | |
299 | */ | |
300 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
301 | unsigned short vid) | |
302 | { | |
303 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
304 | } | |
305 | ||
a513088d | 306 | static void |
56303d34 | 307 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 308 | { |
d657e621 AQ |
309 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
310 | return; | |
7ea7b4a1 | 311 | |
a513088d | 312 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
313 | } |
314 | ||
3abe4adb AQ |
315 | /** |
316 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
317 | * @bat_priv: the bat priv with all the soft interface information | |
318 | * @tt_local_entry: the TT entry involved in the event | |
319 | * @event_flags: flags to store in the event structure | |
320 | */ | |
56303d34 | 321 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
322 | struct batadv_tt_local_entry *tt_local_entry, |
323 | uint8_t event_flags) | |
a73105b8 | 324 | { |
56303d34 | 325 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
326 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
327 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
328 | bool event_removed = false; |
329 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
330 | |
331 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
332 | if (!tt_change_node) |
333 | return; | |
334 | ||
ff66c975 | 335 | tt_change_node->change.flags = flags; |
e1bf0c14 | 336 | tt_change_node->change.reserved = 0; |
3abe4adb | 337 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
c018ad3d | 338 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 339 | |
acd34afa | 340 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
341 | |
342 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
343 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
344 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 345 | list) { |
3abe4adb | 346 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
347 | continue; |
348 | ||
349 | /* DEL+ADD in the same orig interval have no effect and can be | |
350 | * removed to avoid silly behaviour on the receiver side. The | |
351 | * other way around (ADD+DEL) can happen in case of roaming of | |
352 | * a client still in the NEW state. Roaming of NEW clients is | |
353 | * now possible due to automatically recognition of "temporary" | |
354 | * clients | |
355 | */ | |
acd34afa | 356 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
357 | if (!del_op_requested && del_op_entry) |
358 | goto del; | |
359 | if (del_op_requested && !del_op_entry) | |
360 | goto del; | |
361 | continue; | |
362 | del: | |
363 | list_del(&entry->list); | |
364 | kfree(entry); | |
155e4e12 | 365 | kfree(tt_change_node); |
3b643de5 AQ |
366 | event_removed = true; |
367 | goto unlock; | |
368 | } | |
369 | ||
a73105b8 | 370 | /* track the change in the OGMinterval list */ |
807736f6 | 371 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
372 | |
373 | unlock: | |
807736f6 | 374 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 375 | |
3b643de5 | 376 | if (event_removed) |
807736f6 | 377 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 378 | else |
807736f6 | 379 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
380 | } |
381 | ||
335fbe0f ML |
382 | /** |
383 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
384 | * @changes_num: number of tt changes | |
385 | * | |
386 | * Returns computed length in bytes. | |
387 | */ | |
388 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 389 | { |
335fbe0f | 390 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
391 | } |
392 | ||
298e6e68 AQ |
393 | /** |
394 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
395 | * @tt_len: available space | |
396 | * | |
397 | * Returns the number of entries. | |
398 | */ | |
399 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
400 | { | |
401 | return tt_len / batadv_tt_len(1); | |
402 | } | |
403 | ||
a19d3d85 ML |
404 | /** |
405 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
406 | * size when transmitted over the air | |
407 | * @bat_priv: the bat priv with all the soft interface information | |
408 | * | |
409 | * Returns local translation table size in bytes. | |
410 | */ | |
411 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
412 | { | |
413 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
414 | struct batadv_softif_vlan *vlan; | |
415 | int hdr_size; | |
416 | ||
417 | rcu_read_lock(); | |
418 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
419 | num_vlan++; | |
420 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
421 | } | |
422 | rcu_read_unlock(); | |
423 | ||
424 | /* header size of tvlv encapsulated tt response payload */ | |
425 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
426 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
427 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
428 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
429 | ||
430 | return hdr_size + batadv_tt_len(tt_local_entries); | |
431 | } | |
432 | ||
56303d34 | 433 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 434 | { |
807736f6 | 435 | if (bat_priv->tt.local_hash) |
5346c35e | 436 | return 0; |
c6c8fea2 | 437 | |
807736f6 | 438 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 439 | |
807736f6 | 440 | if (!bat_priv->tt.local_hash) |
5346c35e | 441 | return -ENOMEM; |
c6c8fea2 | 442 | |
dec05074 AQ |
443 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
444 | &batadv_tt_local_hash_lock_class_key); | |
445 | ||
5346c35e | 446 | return 0; |
c6c8fea2 SE |
447 | } |
448 | ||
068ee6e2 AQ |
449 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
450 | struct batadv_tt_global_entry *tt_global, | |
451 | const char *message) | |
452 | { | |
453 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
454 | "Deleting global tt entry %pM (vid: %d): %s\n", |
455 | tt_global->common.addr, | |
456 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
457 | |
458 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 459 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 460 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
461 | } |
462 | ||
c018ad3d AQ |
463 | /** |
464 | * batadv_tt_local_add - add a new client to the local table or update an | |
465 | * existing client | |
466 | * @soft_iface: netdev struct of the mesh interface | |
467 | * @addr: the mac address of the client to add | |
468 | * @vid: VLAN identifier | |
469 | * @ifindex: index of the interface where the client is connected to (useful to | |
470 | * identify wireless clients) | |
a19d3d85 ML |
471 | * |
472 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 473 | */ |
a19d3d85 | 474 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
c018ad3d | 475 | unsigned short vid, int ifindex) |
c6c8fea2 | 476 | { |
56303d34 | 477 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
478 | struct batadv_tt_local_entry *tt_local; |
479 | struct batadv_tt_global_entry *tt_global; | |
0c69aecc | 480 | struct net_device *in_dev = NULL; |
db08e6e5 | 481 | struct hlist_head *head; |
56303d34 | 482 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
483 | int hash_added, table_size, packet_size_max; |
484 | bool ret = false, roamed_back = false; | |
c6c8fea2 | 485 | |
0c69aecc AQ |
486 | if (ifindex != BATADV_NULL_IFINDEX) |
487 | in_dev = dev_get_by_index(&init_net, ifindex); | |
488 | ||
c018ad3d AQ |
489 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
490 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 491 | |
47c94655 AQ |
492 | if (tt_local) { |
493 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
494 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
495 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
496 | "Re-adding pending client %pM (vid: %d)\n", |
497 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
498 | /* whatever the reason why the PENDING flag was set, |
499 | * this is a client which was enqueued to be removed in | |
500 | * this orig_interval. Since it popped up again, the | |
501 | * flag can be reset like it was never enqueued | |
502 | */ | |
503 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
504 | goto add_event; | |
505 | } | |
506 | ||
507 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
508 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
509 | "Roaming client %pM (vid: %d) came back to its original location\n", |
510 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
511 | /* the ROAM flag is set because this client roamed away |
512 | * and the node got a roaming_advertisement message. Now | |
513 | * that the client popped up again at its original | |
514 | * location such flag can be unset | |
515 | */ | |
516 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
517 | roamed_back = true; | |
518 | } | |
519 | goto check_roaming; | |
c6c8fea2 SE |
520 | } |
521 | ||
a19d3d85 ML |
522 | /* Ignore the client if we cannot send it in a full table response. */ |
523 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
524 | table_size += batadv_tt_len(1); | |
525 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
526 | if (table_size > packet_size_max) { | |
527 | net_ratelimited_function(batadv_info, soft_iface, | |
528 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
529 | table_size, packet_size_max, addr); | |
530 | goto out; | |
531 | } | |
532 | ||
47c94655 AQ |
533 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
534 | if (!tt_local) | |
7683fdc1 | 535 | goto out; |
a73105b8 | 536 | |
39c75a51 | 537 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
538 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
539 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 540 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 541 | |
47c94655 | 542 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
543 | /* The local entry has to be marked as NEW to avoid to send it in |
544 | * a full table response going out before the next ttvn increment | |
545 | * (consistency check) | |
546 | */ | |
547 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 548 | tt_local->common.vid = vid; |
0c69aecc | 549 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
550 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
551 | atomic_set(&tt_local->common.refcount, 2); | |
552 | tt_local->last_seen = jiffies; | |
553 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
554 | |
555 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 556 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 557 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 558 | |
807736f6 | 559 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 560 | batadv_choose_tt, &tt_local->common, |
47c94655 | 561 | &tt_local->common.hash_entry); |
80b3f58c SW |
562 | |
563 | if (unlikely(hash_added != 0)) { | |
564 | /* remove the reference for the hash */ | |
47c94655 | 565 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
566 | goto out; |
567 | } | |
568 | ||
068ee6e2 | 569 | add_event: |
3abe4adb | 570 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 571 | |
068ee6e2 AQ |
572 | check_roaming: |
573 | /* Check whether it is a roaming, but don't do anything if the roaming | |
574 | * process has already been handled | |
575 | */ | |
576 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 577 | /* These node are probably going to update their tt table */ |
47c94655 | 578 | head = &tt_global->orig_list; |
db08e6e5 | 579 | rcu_read_lock(); |
b67bfe0d | 580 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 581 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 582 | tt_global->common.vid, |
a513088d | 583 | orig_entry->orig_node); |
db08e6e5 SW |
584 | } |
585 | rcu_read_unlock(); | |
068ee6e2 AQ |
586 | if (roamed_back) { |
587 | batadv_tt_global_free(bat_priv, tt_global, | |
588 | "Roaming canceled"); | |
589 | tt_global = NULL; | |
590 | } else { | |
591 | /* The global entry has to be marked as ROAMING and | |
592 | * has to be kept for consistency purpose | |
593 | */ | |
594 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
595 | tt_global->roam_at = jiffies; | |
596 | } | |
7683fdc1 | 597 | } |
068ee6e2 | 598 | |
a19d3d85 ML |
599 | ret = true; |
600 | ||
7683fdc1 | 601 | out: |
0c69aecc AQ |
602 | if (in_dev) |
603 | dev_put(in_dev); | |
47c94655 AQ |
604 | if (tt_local) |
605 | batadv_tt_local_entry_free_ref(tt_local); | |
606 | if (tt_global) | |
607 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 608 | return ret; |
c6c8fea2 SE |
609 | } |
610 | ||
7ea7b4a1 AQ |
611 | /** |
612 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
613 | * within a TT Response directed to another node | |
614 | * @orig_node: originator for which the TT data has to be prepared | |
615 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
616 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
617 | * changed can be stored | |
618 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
619 | * function reserves the amount of space needed to send the entire global TT | |
620 | * table. In case of success the value is updated with the real amount of | |
621 | * reserved bytes | |
622 | ||
623 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
624 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
625 | * objects, one per active VLAN served by the originator node. | |
626 | * | |
627 | * Return the size of the allocated buffer or 0 in case of failure. | |
628 | */ | |
629 | static uint16_t | |
630 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
631 | struct batadv_tvlv_tt_data **tt_data, | |
632 | struct batadv_tvlv_tt_change **tt_change, | |
633 | int32_t *tt_len) | |
634 | { | |
635 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
636 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
637 | struct batadv_orig_node_vlan *vlan; | |
638 | uint8_t *tt_change_ptr; | |
639 | ||
640 | rcu_read_lock(); | |
641 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
642 | num_vlan++; | |
643 | num_entries += atomic_read(&vlan->tt.num_entries); | |
644 | } | |
645 | ||
646 | change_offset = sizeof(**tt_data); | |
647 | change_offset += num_vlan * sizeof(*tt_vlan); | |
648 | ||
649 | /* if tt_len is negative, allocate the space needed by the full table */ | |
650 | if (*tt_len < 0) | |
651 | *tt_len = batadv_tt_len(num_entries); | |
652 | ||
653 | tvlv_len = *tt_len; | |
654 | tvlv_len += change_offset; | |
655 | ||
656 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
657 | if (!*tt_data) { | |
658 | *tt_len = 0; | |
659 | goto out; | |
660 | } | |
661 | ||
662 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
663 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
664 | (*tt_data)->num_vlan = htons(num_vlan); | |
665 | ||
666 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
667 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
668 | tt_vlan->vid = htons(vlan->vid); | |
669 | tt_vlan->crc = htonl(vlan->tt.crc); | |
670 | ||
671 | tt_vlan++; | |
672 | } | |
673 | ||
674 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
675 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
676 | ||
677 | out: | |
678 | rcu_read_unlock(); | |
679 | return tvlv_len; | |
680 | } | |
681 | ||
682 | /** | |
683 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
684 | * node | |
685 | * @bat_priv: the bat priv with all the soft interface information | |
686 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
687 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
688 | * changes can be stored | |
689 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
690 | * function reserves the amount of space needed to send the entire local TT | |
691 | * table. In case of success the value is updated with the real amount of | |
692 | * reserved bytes | |
693 | * | |
694 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
695 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
696 | * objects, one per active VLAN. | |
697 | * | |
698 | * Return the size of the allocated buffer or 0 in case of failure. | |
699 | */ | |
700 | static uint16_t | |
701 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
702 | struct batadv_tvlv_tt_data **tt_data, | |
703 | struct batadv_tvlv_tt_change **tt_change, | |
704 | int32_t *tt_len) | |
705 | { | |
706 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
707 | struct batadv_softif_vlan *vlan; | |
708 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
709 | uint8_t *tt_change_ptr; | |
710 | int change_offset; | |
711 | ||
712 | rcu_read_lock(); | |
713 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
714 | num_vlan++; | |
715 | num_entries += atomic_read(&vlan->tt.num_entries); | |
716 | } | |
717 | ||
718 | change_offset = sizeof(**tt_data); | |
719 | change_offset += num_vlan * sizeof(*tt_vlan); | |
720 | ||
721 | /* if tt_len is negative, allocate the space needed by the full table */ | |
722 | if (*tt_len < 0) | |
723 | *tt_len = batadv_tt_len(num_entries); | |
724 | ||
725 | tvlv_len = *tt_len; | |
726 | tvlv_len += change_offset; | |
727 | ||
728 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
729 | if (!*tt_data) { | |
730 | tvlv_len = 0; | |
731 | goto out; | |
732 | } | |
733 | ||
734 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
735 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
736 | (*tt_data)->num_vlan = htons(num_vlan); | |
737 | ||
738 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
739 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
740 | tt_vlan->vid = htons(vlan->vid); | |
741 | tt_vlan->crc = htonl(vlan->tt.crc); | |
742 | ||
743 | tt_vlan++; | |
744 | } | |
745 | ||
746 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
747 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
748 | ||
749 | out: | |
750 | rcu_read_unlock(); | |
751 | return tvlv_len; | |
752 | } | |
753 | ||
e1bf0c14 ML |
754 | /** |
755 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
756 | * after local tt changes have been committed | |
757 | * @bat_priv: the bat priv with all the soft interface information | |
758 | */ | |
759 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 760 | { |
e1bf0c14 ML |
761 | struct batadv_tt_change_node *entry, *safe; |
762 | struct batadv_tvlv_tt_data *tt_data; | |
763 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 764 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 765 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 766 | uint16_t tvlv_len; |
be9aa4c1 | 767 | |
7ea7b4a1 AQ |
768 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
769 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
770 | |
771 | /* if we have too many changes for one packet don't send any | |
772 | * and wait for the tt table request which will be fragmented | |
773 | */ | |
e1bf0c14 ML |
774 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
775 | tt_diff_len = 0; | |
be9aa4c1 | 776 | |
7ea7b4a1 AQ |
777 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
778 | &tt_change, &tt_diff_len); | |
779 | if (!tvlv_len) | |
e1bf0c14 | 780 | return; |
be9aa4c1 | 781 | |
e1bf0c14 | 782 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 783 | |
e1bf0c14 ML |
784 | if (tt_diff_len == 0) |
785 | goto container_register; | |
be9aa4c1 | 786 | |
807736f6 SE |
787 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
788 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 789 | |
807736f6 | 790 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 791 | list) { |
e1bf0c14 ML |
792 | if (tt_diff_entries_count < tt_diff_entries_num) { |
793 | memcpy(tt_change + tt_diff_entries_count, | |
794 | &entry->change, | |
795 | sizeof(struct batadv_tvlv_tt_change)); | |
796 | tt_diff_entries_count++; | |
c6c8fea2 | 797 | } |
a73105b8 AQ |
798 | list_del(&entry->list); |
799 | kfree(entry); | |
c6c8fea2 | 800 | } |
807736f6 | 801 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
802 | |
803 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
804 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
805 | kfree(bat_priv->tt.last_changeset); | |
806 | bat_priv->tt.last_changeset_len = 0; | |
807 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 808 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 809 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 810 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 811 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
812 | * instead of providing the diff |
813 | */ | |
e1bf0c14 | 814 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 815 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
816 | memcpy(bat_priv->tt.last_changeset, |
817 | tt_change, tt_change_len); | |
818 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
819 | } |
820 | } | |
807736f6 | 821 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 822 | |
e1bf0c14 ML |
823 | container_register: |
824 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 825 | tvlv_len); |
e1bf0c14 | 826 | kfree(tt_data); |
c6c8fea2 SE |
827 | } |
828 | ||
08c36d3e | 829 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
830 | { |
831 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 832 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 833 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 834 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 835 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 836 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 837 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 838 | struct hlist_head *head; |
7ea7b4a1 | 839 | unsigned short vid; |
c90681b8 | 840 | uint32_t i; |
85766a82 AQ |
841 | int last_seen_secs; |
842 | int last_seen_msecs; | |
843 | unsigned long last_seen_jiffies; | |
844 | bool no_purge; | |
845 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 846 | |
30da63a6 ML |
847 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
848 | if (!primary_if) | |
32ae9b22 | 849 | goto out; |
c6c8fea2 | 850 | |
86ceb360 | 851 | seq_printf(seq, |
7ea7b4a1 AQ |
852 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
853 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
854 | seq_printf(seq, " %-13s %s %-7s %-9s (%-10s)\n", "Client", "VID", | |
855 | "Flags", "Last seen", "CRC"); | |
c6c8fea2 | 856 | |
c6c8fea2 SE |
857 | for (i = 0; i < hash->size; i++) { |
858 | head = &hash->table[i]; | |
859 | ||
7aadf889 | 860 | rcu_read_lock(); |
b67bfe0d | 861 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 862 | head, hash_entry) { |
85766a82 AQ |
863 | tt_local = container_of(tt_common_entry, |
864 | struct batadv_tt_local_entry, | |
865 | common); | |
7ea7b4a1 | 866 | vid = tt_common_entry->vid; |
85766a82 AQ |
867 | last_seen_jiffies = jiffies - tt_local->last_seen; |
868 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
869 | last_seen_secs = last_seen_msecs / 1000; | |
870 | last_seen_msecs = last_seen_msecs % 1000; | |
871 | ||
872 | no_purge = tt_common_entry->flags & np_flag; | |
873 | ||
7ea7b4a1 AQ |
874 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
875 | if (!vlan) { | |
876 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
877 | BATADV_PRINT_VID(vid)); | |
878 | continue; | |
879 | } | |
880 | ||
881 | seq_printf(seq, | |
882 | " * %pM %4i [%c%c%c%c%c] %3u.%03u (%#.8x)\n", | |
7c64fd98 | 883 | tt_common_entry->addr, |
16052789 | 884 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 885 | (tt_common_entry->flags & |
acd34afa | 886 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 887 | no_purge ? 'P' : '.', |
7c64fd98 | 888 | (tt_common_entry->flags & |
acd34afa | 889 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 890 | (tt_common_entry->flags & |
acd34afa | 891 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 892 | (tt_common_entry->flags & |
85766a82 | 893 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
a7966d90 | 894 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
895 | no_purge ? 0 : last_seen_msecs, |
896 | vlan->tt.crc); | |
897 | ||
898 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 899 | } |
7aadf889 | 900 | rcu_read_unlock(); |
c6c8fea2 | 901 | } |
32ae9b22 ML |
902 | out: |
903 | if (primary_if) | |
e5d89254 | 904 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 905 | return 0; |
c6c8fea2 SE |
906 | } |
907 | ||
56303d34 SE |
908 | static void |
909 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
910 | struct batadv_tt_local_entry *tt_local_entry, | |
911 | uint16_t flags, const char *message) | |
c6c8fea2 | 912 | { |
3abe4adb | 913 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 914 | |
015758d0 AQ |
915 | /* The local client has to be marked as "pending to be removed" but has |
916 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
917 | * response issued before the net ttvn increment (consistency check) |
918 | */ | |
acd34afa | 919 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 920 | |
39c75a51 | 921 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
922 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
923 | tt_local_entry->common.addr, | |
924 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
925 | } |
926 | ||
7f91d06c AQ |
927 | /** |
928 | * batadv_tt_local_remove - logically remove an entry from the local table | |
929 | * @bat_priv: the bat priv with all the soft interface information | |
930 | * @addr: the MAC address of the client to remove | |
c018ad3d | 931 | * @vid: VLAN identifier |
7f91d06c AQ |
932 | * @message: message to append to the log on deletion |
933 | * @roaming: true if the deletion is due to a roaming event | |
934 | * | |
935 | * Returns the flags assigned to the local entry before being deleted | |
936 | */ | |
937 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
938 | const uint8_t *addr, unsigned short vid, |
939 | const char *message, bool roaming) | |
c6c8fea2 | 940 | { |
170173bf | 941 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 942 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 943 | |
c018ad3d | 944 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
945 | if (!tt_local_entry) |
946 | goto out; | |
947 | ||
7f91d06c AQ |
948 | curr_flags = tt_local_entry->common.flags; |
949 | ||
acd34afa | 950 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
951 | /* if this global entry addition is due to a roaming, the node has to |
952 | * mark the local entry as "roamed" in order to correctly reroute | |
953 | * packets later | |
954 | */ | |
7c1fd91d | 955 | if (roaming) { |
acd34afa | 956 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
957 | /* mark the local client as ROAMed */ |
958 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
959 | } | |
42d0b044 | 960 | |
068ee6e2 AQ |
961 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
962 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
963 | message); | |
964 | goto out; | |
965 | } | |
966 | /* if this client has been added right now, it is possible to | |
967 | * immediately purge it | |
968 | */ | |
3abe4adb | 969 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
970 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
971 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 972 | |
7683fdc1 AQ |
973 | out: |
974 | if (tt_local_entry) | |
a513088d | 975 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
976 | |
977 | return curr_flags; | |
c6c8fea2 SE |
978 | } |
979 | ||
a19d3d85 ML |
980 | /** |
981 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
982 | * @bat_priv: the bat priv with all the soft interface information | |
983 | * @head: pointer to the list containing the local tt entries | |
984 | * @timeout: parameter deciding whether a given tt local entry is considered | |
985 | * inactive or not | |
986 | */ | |
56303d34 | 987 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
988 | struct hlist_head *head, |
989 | int timeout) | |
c6c8fea2 | 990 | { |
56303d34 SE |
991 | struct batadv_tt_local_entry *tt_local_entry; |
992 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 993 | struct hlist_node *node_tmp; |
acd34afa | 994 | |
b67bfe0d | 995 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
996 | hash_entry) { |
997 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
998 | struct batadv_tt_local_entry, |
999 | common); | |
acd34afa SE |
1000 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1001 | continue; | |
1002 | ||
1003 | /* entry already marked for deletion */ | |
1004 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1005 | continue; | |
1006 | ||
a19d3d85 | 1007 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1008 | continue; |
1009 | ||
1010 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1011 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1012 | } | |
1013 | } | |
1014 | ||
a19d3d85 ML |
1015 | /** |
1016 | * batadv_tt_local_purge - purge inactive tt local entries | |
1017 | * @bat_priv: the bat priv with all the soft interface information | |
1018 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1019 | * inactive or not | |
1020 | */ | |
1021 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1022 | int timeout) | |
acd34afa | 1023 | { |
807736f6 | 1024 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1025 | struct hlist_head *head; |
7683fdc1 | 1026 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1027 | uint32_t i; |
c6c8fea2 | 1028 | |
c6c8fea2 SE |
1029 | for (i = 0; i < hash->size; i++) { |
1030 | head = &hash->table[i]; | |
7683fdc1 | 1031 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1032 | |
7683fdc1 | 1033 | spin_lock_bh(list_lock); |
a19d3d85 | 1034 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1035 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1036 | } |
c6c8fea2 SE |
1037 | } |
1038 | ||
56303d34 | 1039 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1040 | { |
5bf74e9c | 1041 | struct batadv_hashtable *hash; |
a73105b8 | 1042 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1043 | struct batadv_tt_common_entry *tt_common_entry; |
1044 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1045 | struct hlist_node *node_tmp; |
7683fdc1 | 1046 | struct hlist_head *head; |
c90681b8 | 1047 | uint32_t i; |
a73105b8 | 1048 | |
807736f6 | 1049 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1050 | return; |
1051 | ||
807736f6 | 1052 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1053 | |
1054 | for (i = 0; i < hash->size; i++) { | |
1055 | head = &hash->table[i]; | |
1056 | list_lock = &hash->list_locks[i]; | |
1057 | ||
1058 | spin_lock_bh(list_lock); | |
b67bfe0d | 1059 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1060 | head, hash_entry) { |
b67bfe0d | 1061 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1062 | tt_local = container_of(tt_common_entry, |
1063 | struct batadv_tt_local_entry, | |
1064 | common); | |
1065 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
1066 | } |
1067 | spin_unlock_bh(list_lock); | |
1068 | } | |
1069 | ||
1a8eaf07 | 1070 | batadv_hash_destroy(hash); |
a73105b8 | 1071 | |
807736f6 | 1072 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1073 | } |
1074 | ||
56303d34 | 1075 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1076 | { |
807736f6 | 1077 | if (bat_priv->tt.global_hash) |
5346c35e | 1078 | return 0; |
c6c8fea2 | 1079 | |
807736f6 | 1080 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1081 | |
807736f6 | 1082 | if (!bat_priv->tt.global_hash) |
5346c35e | 1083 | return -ENOMEM; |
c6c8fea2 | 1084 | |
dec05074 AQ |
1085 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1086 | &batadv_tt_global_hash_lock_class_key); | |
1087 | ||
5346c35e | 1088 | return 0; |
c6c8fea2 SE |
1089 | } |
1090 | ||
56303d34 | 1091 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1092 | { |
56303d34 | 1093 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1094 | |
807736f6 | 1095 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1096 | |
807736f6 | 1097 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1098 | list) { |
1099 | list_del(&entry->list); | |
1100 | kfree(entry); | |
1101 | } | |
c6c8fea2 | 1102 | |
807736f6 SE |
1103 | atomic_set(&bat_priv->tt.local_changes, 0); |
1104 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1105 | } |
c6c8fea2 | 1106 | |
d657e621 AQ |
1107 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1108 | * batadv_tt_global_entry list | |
1109 | * | |
1110 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1111 | */ |
d657e621 AQ |
1112 | static struct batadv_tt_orig_list_entry * |
1113 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1114 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1115 | { |
d657e621 | 1116 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1117 | const struct hlist_head *head; |
db08e6e5 SW |
1118 | |
1119 | rcu_read_lock(); | |
1120 | head = &entry->orig_list; | |
b67bfe0d | 1121 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1122 | if (tmp_orig_entry->orig_node != orig_node) |
1123 | continue; | |
1124 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1125 | continue; | |
1126 | ||
1127 | orig_entry = tmp_orig_entry; | |
1128 | break; | |
db08e6e5 SW |
1129 | } |
1130 | rcu_read_unlock(); | |
d657e621 AQ |
1131 | |
1132 | return orig_entry; | |
1133 | } | |
1134 | ||
1135 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1136 | * returns true if found, false otherwise | |
1137 | */ | |
1138 | static bool | |
1139 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1140 | const struct batadv_orig_node *orig_node) | |
1141 | { | |
1142 | struct batadv_tt_orig_list_entry *orig_entry; | |
1143 | bool found = false; | |
1144 | ||
1145 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1146 | if (orig_entry) { | |
1147 | found = true; | |
1148 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1149 | } | |
1150 | ||
db08e6e5 SW |
1151 | return found; |
1152 | } | |
1153 | ||
a513088d | 1154 | static void |
d657e621 | 1155 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1156 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1157 | { |
56303d34 | 1158 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1159 | |
d657e621 | 1160 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1161 | if (orig_entry) { |
1162 | /* refresh the ttvn: the current value could be a bogus one that | |
1163 | * was added during a "temporary client detection" | |
1164 | */ | |
1165 | orig_entry->ttvn = ttvn; | |
d657e621 | 1166 | goto out; |
30cfd02b | 1167 | } |
d657e621 | 1168 | |
db08e6e5 SW |
1169 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1170 | if (!orig_entry) | |
d657e621 | 1171 | goto out; |
db08e6e5 SW |
1172 | |
1173 | INIT_HLIST_NODE(&orig_entry->list); | |
1174 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1175 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1176 | orig_entry->orig_node = orig_node; |
1177 | orig_entry->ttvn = ttvn; | |
d657e621 | 1178 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1179 | |
d657e621 | 1180 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1181 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1182 | &tt_global->orig_list); |
1183 | spin_unlock_bh(&tt_global->list_lock); | |
1184 | out: | |
1185 | if (orig_entry) | |
1186 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1187 | } |
1188 | ||
d4ff40f6 AQ |
1189 | /** |
1190 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1191 | * @bat_priv: the bat priv with all the soft interface information | |
1192 | * @orig_node: the originator announcing the client | |
1193 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1194 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1195 | * @flags: TT flags that have to be set for this non-mesh client |
1196 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1197 | * | |
1198 | * Add a new TT global entry for the given originator. If the entry already | |
1199 | * exists add a new reference to the given originator (a global entry can have | |
1200 | * references to multiple originators) and adjust the flags attribute to reflect | |
1201 | * the function argument. | |
1202 | * If a TT local entry exists for this non-mesh client remove it. | |
1203 | * | |
1204 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1205 | * |
1206 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1207 | */ |
1e5d49fc AQ |
1208 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1209 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1210 | const unsigned char *tt_addr, |
1211 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1212 | uint8_t ttvn) |
a73105b8 | 1213 | { |
170173bf SE |
1214 | struct batadv_tt_global_entry *tt_global_entry; |
1215 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1216 | bool ret = false; |
80b3f58c | 1217 | int hash_added; |
56303d34 | 1218 | struct batadv_tt_common_entry *common; |
7f91d06c | 1219 | uint16_t local_flags; |
c6c8fea2 | 1220 | |
cfd4f757 AQ |
1221 | /* ignore global entries from backbone nodes */ |
1222 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1223 | return true; | |
1224 | ||
c018ad3d AQ |
1225 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1226 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1227 | |
1228 | /* if the node already has a local client for this entry, it has to wait | |
1229 | * for a roaming advertisement instead of manually messing up the global | |
1230 | * table | |
1231 | */ | |
1232 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1233 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1234 | goto out; | |
a73105b8 AQ |
1235 | |
1236 | if (!tt_global_entry) { | |
d4f44692 | 1237 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1238 | if (!tt_global_entry) |
7683fdc1 AQ |
1239 | goto out; |
1240 | ||
c0a55929 SE |
1241 | common = &tt_global_entry->common; |
1242 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
c018ad3d | 1243 | common->vid = vid; |
db08e6e5 | 1244 | |
d4f44692 | 1245 | common->flags = flags; |
cc47f66e | 1246 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1247 | /* node must store current time in case of roaming. This is |
1248 | * needed to purge this entry out on timeout (if nobody claims | |
1249 | * it) | |
1250 | */ | |
1251 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1252 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1253 | atomic_set(&common->refcount, 2); |
30cfd02b | 1254 | common->added_at = jiffies; |
db08e6e5 SW |
1255 | |
1256 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1257 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 1258 | |
807736f6 | 1259 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1260 | batadv_compare_tt, |
c018ad3d | 1261 | batadv_choose_tt, common, |
a513088d | 1262 | &common->hash_entry); |
80b3f58c SW |
1263 | |
1264 | if (unlikely(hash_added != 0)) { | |
1265 | /* remove the reference for the hash */ | |
a513088d | 1266 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1267 | goto out_remove; |
1268 | } | |
a73105b8 | 1269 | } else { |
068ee6e2 | 1270 | common = &tt_global_entry->common; |
30cfd02b AQ |
1271 | /* If there is already a global entry, we can use this one for |
1272 | * our processing. | |
068ee6e2 AQ |
1273 | * But if we are trying to add a temporary client then here are |
1274 | * two options at this point: | |
1275 | * 1) the global client is not a temporary client: the global | |
1276 | * client has to be left as it is, temporary information | |
1277 | * should never override any already known client state | |
1278 | * 2) the global client is a temporary client: purge the | |
1279 | * originator list and add the new one orig_entry | |
30cfd02b | 1280 | */ |
068ee6e2 AQ |
1281 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1282 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1283 | goto out; | |
1284 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1285 | orig_node)) | |
1286 | goto out_remove; | |
1287 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1288 | goto add_orig_entry; | |
1289 | } | |
30cfd02b AQ |
1290 | |
1291 | /* if the client was temporary added before receiving the first | |
1292 | * OGM announcing it, we have to clear the TEMP flag | |
1293 | */ | |
068ee6e2 | 1294 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1295 | |
e9c00136 AQ |
1296 | /* the change can carry possible "attribute" flags like the |
1297 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1298 | * client entry | |
1299 | */ | |
1300 | tt_global_entry->common.flags |= flags; | |
1301 | ||
acd34afa SE |
1302 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1303 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1304 | * delete + roaming change for this originator. |
1305 | * | |
1306 | * We should first delete the old originator before adding the | |
1307 | * new one. | |
1308 | */ | |
068ee6e2 | 1309 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1310 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1311 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1312 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1313 | } |
1314 | } | |
068ee6e2 | 1315 | add_orig_entry: |
30cfd02b | 1316 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1317 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1318 | |
39c75a51 | 1319 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1320 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1321 | common->addr, BATADV_PRINT_VID(common->vid), | |
1322 | orig_node->orig); | |
1e5d49fc | 1323 | ret = true; |
c6c8fea2 | 1324 | |
80b3f58c | 1325 | out_remove: |
7f91d06c | 1326 | |
a73105b8 | 1327 | /* remove address from local hash if present */ |
c018ad3d | 1328 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1329 | "global tt received", |
c1d07431 | 1330 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1331 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1332 | ||
068ee6e2 AQ |
1333 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1334 | /* this is a normal global add. Therefore the client is not in a | |
1335 | * roaming state anymore. | |
1336 | */ | |
1337 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1338 | ||
7683fdc1 AQ |
1339 | out: |
1340 | if (tt_global_entry) | |
a513088d | 1341 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1342 | if (tt_local_entry) |
1343 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1344 | return ret; |
c6c8fea2 SE |
1345 | } |
1346 | ||
981d8900 | 1347 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
4627456a | 1348 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1349 | * @tt_global_entry: global translation table entry to be analyzed |
1350 | * | |
1351 | * This functon assumes the caller holds rcu_read_lock(). | |
1352 | * Returns best originator list entry or NULL on errors. | |
1353 | */ | |
1354 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1355 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1356 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1357 | { |
4627456a AQ |
1358 | struct batadv_neigh_node *router, *best_router = NULL; |
1359 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1360 | struct hlist_head *head; |
981d8900 | 1361 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1362 | |
1363 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1364 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1365 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
1366 | if (!router) | |
1367 | continue; | |
1368 | ||
4627456a AQ |
1369 | if (best_router && |
1370 | bao->bat_neigh_cmp(router, best_router) <= 0) { | |
1371 | batadv_neigh_node_free_ref(router); | |
1372 | continue; | |
981d8900 SE |
1373 | } |
1374 | ||
4627456a AQ |
1375 | /* release the refcount for the "old" best */ |
1376 | if (best_router) | |
1377 | batadv_neigh_node_free_ref(best_router); | |
1378 | ||
1379 | best_entry = orig_entry; | |
1380 | best_router = router; | |
981d8900 SE |
1381 | } |
1382 | ||
4627456a AQ |
1383 | if (best_router) |
1384 | batadv_neigh_node_free_ref(best_router); | |
1385 | ||
981d8900 SE |
1386 | return best_entry; |
1387 | } | |
1388 | ||
1389 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1390 | * for this global entry | |
4627456a | 1391 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1392 | * @tt_global_entry: global translation table entry to be printed |
1393 | * @seq: debugfs table seq_file struct | |
1394 | * | |
1395 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1396 | */ |
a513088d | 1397 | static void |
4627456a AQ |
1398 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1399 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1400 | struct seq_file *seq) |
db08e6e5 | 1401 | { |
981d8900 | 1402 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1403 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1404 | struct batadv_orig_node_vlan *vlan; |
1405 | struct hlist_head *head; | |
db08e6e5 | 1406 | uint8_t last_ttvn; |
7ea7b4a1 | 1407 | uint16_t flags; |
db08e6e5 SW |
1408 | |
1409 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1410 | flags = tt_common_entry->flags; |
1411 | ||
4627456a | 1412 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1413 | if (best_entry) { |
7ea7b4a1 AQ |
1414 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1415 | tt_common_entry->vid); | |
1416 | if (!vlan) { | |
1417 | seq_printf(seq, | |
1418 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1419 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1420 | best_entry->orig_node->orig); | |
1421 | goto print_list; | |
1422 | } | |
1423 | ||
981d8900 | 1424 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1425 | seq_printf(seq, |
16052789 | 1426 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1427 | '*', tt_global_entry->common.addr, |
16052789 | 1428 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1429 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1430 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1431 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1432 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1433 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1434 | |
1435 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1436 | } |
db08e6e5 | 1437 | |
7ea7b4a1 | 1438 | print_list: |
db08e6e5 SW |
1439 | head = &tt_global_entry->orig_list; |
1440 | ||
b67bfe0d | 1441 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1442 | if (best_entry == orig_entry) |
1443 | continue; | |
1444 | ||
7ea7b4a1 AQ |
1445 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1446 | tt_common_entry->vid); | |
1447 | if (!vlan) { | |
1448 | seq_printf(seq, | |
1449 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1450 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1451 | orig_entry->orig_node->orig); | |
1452 | continue; | |
1453 | } | |
1454 | ||
db08e6e5 | 1455 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1456 | seq_printf(seq, |
7ea7b4a1 | 1457 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 | 1458 | '+', tt_global_entry->common.addr, |
16052789 | 1459 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1460 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1461 | last_ttvn, vlan->tt.crc, |
acd34afa | 1462 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1463 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1464 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
7ea7b4a1 AQ |
1465 | |
1466 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1467 | } |
1468 | } | |
1469 | ||
08c36d3e | 1470 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1471 | { |
1472 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1473 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1474 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1475 | struct batadv_tt_common_entry *tt_common_entry; |
1476 | struct batadv_tt_global_entry *tt_global; | |
1477 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1478 | struct hlist_head *head; |
c90681b8 | 1479 | uint32_t i; |
c6c8fea2 | 1480 | |
30da63a6 ML |
1481 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1482 | if (!primary_if) | |
32ae9b22 | 1483 | goto out; |
c6c8fea2 | 1484 | |
2dafb49d AQ |
1485 | seq_printf(seq, |
1486 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1487 | net_dev->name); |
16052789 AQ |
1488 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1489 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1490 | "CRC", "Flags"); | |
c6c8fea2 | 1491 | |
c6c8fea2 SE |
1492 | for (i = 0; i < hash->size; i++) { |
1493 | head = &hash->table[i]; | |
1494 | ||
7aadf889 | 1495 | rcu_read_lock(); |
b67bfe0d | 1496 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1497 | head, hash_entry) { |
56303d34 SE |
1498 | tt_global = container_of(tt_common_entry, |
1499 | struct batadv_tt_global_entry, | |
1500 | common); | |
4627456a | 1501 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1502 | } |
7aadf889 | 1503 | rcu_read_unlock(); |
c6c8fea2 | 1504 | } |
32ae9b22 ML |
1505 | out: |
1506 | if (primary_if) | |
e5d89254 | 1507 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1508 | return 0; |
c6c8fea2 SE |
1509 | } |
1510 | ||
db08e6e5 | 1511 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1512 | static void |
56303d34 | 1513 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1514 | { |
db08e6e5 | 1515 | struct hlist_head *head; |
b67bfe0d | 1516 | struct hlist_node *safe; |
56303d34 | 1517 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1518 | |
db08e6e5 SW |
1519 | spin_lock_bh(&tt_global_entry->list_lock); |
1520 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1521 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1522 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1523 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1524 | tt_global_entry->common.vid); | |
a513088d | 1525 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1526 | } |
1527 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1528 | } |
1529 | ||
a513088d | 1530 | static void |
56303d34 SE |
1531 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1532 | struct batadv_tt_global_entry *tt_global_entry, | |
1533 | struct batadv_orig_node *orig_node, | |
a513088d | 1534 | const char *message) |
db08e6e5 SW |
1535 | { |
1536 | struct hlist_head *head; | |
b67bfe0d | 1537 | struct hlist_node *safe; |
56303d34 | 1538 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1539 | unsigned short vid; |
db08e6e5 SW |
1540 | |
1541 | spin_lock_bh(&tt_global_entry->list_lock); | |
1542 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1543 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1544 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1545 | vid = tt_global_entry->common.vid; |
39c75a51 | 1546 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1547 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1548 | orig_node->orig, |
16052789 AQ |
1549 | tt_global_entry->common.addr, |
1550 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1551 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1552 | batadv_tt_global_size_dec(orig_node, |
1553 | tt_global_entry->common.vid); | |
a513088d | 1554 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1555 | } |
1556 | } | |
1557 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1558 | } | |
1559 | ||
db08e6e5 | 1560 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1561 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1562 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1563 | */ |
a513088d | 1564 | static void |
56303d34 SE |
1565 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1566 | struct batadv_tt_global_entry *tt_global_entry, | |
1567 | struct batadv_orig_node *orig_node, | |
1568 | const char *message) | |
db08e6e5 SW |
1569 | { |
1570 | bool last_entry = true; | |
1571 | struct hlist_head *head; | |
56303d34 | 1572 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1573 | |
1574 | /* no local entry exists, case 1: | |
1575 | * Check if this is the last one or if other entries exist. | |
1576 | */ | |
1577 | ||
1578 | rcu_read_lock(); | |
1579 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1580 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1581 | if (orig_entry->orig_node != orig_node) { |
1582 | last_entry = false; | |
1583 | break; | |
1584 | } | |
1585 | } | |
1586 | rcu_read_unlock(); | |
1587 | ||
1588 | if (last_entry) { | |
1589 | /* its the last one, mark for roaming. */ | |
acd34afa | 1590 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1591 | tt_global_entry->roam_at = jiffies; |
1592 | } else | |
1593 | /* there is another entry, we can simply delete this | |
1594 | * one and can still use the other one. | |
1595 | */ | |
a513088d SE |
1596 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1597 | orig_node, message); | |
db08e6e5 SW |
1598 | } |
1599 | ||
c018ad3d AQ |
1600 | /** |
1601 | * batadv_tt_global_del - remove a client from the global table | |
1602 | * @bat_priv: the bat priv with all the soft interface information | |
1603 | * @orig_node: an originator serving this client | |
1604 | * @addr: the mac address of the client | |
1605 | * @vid: VLAN identifier | |
1606 | * @message: a message explaining the reason for deleting the client to print | |
1607 | * for debugging purpose | |
1608 | * @roaming: true if the deletion has been triggered by a roaming event | |
1609 | */ | |
56303d34 SE |
1610 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1611 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1612 | const unsigned char *addr, unsigned short vid, |
a513088d | 1613 | const char *message, bool roaming) |
a73105b8 | 1614 | { |
170173bf | 1615 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1616 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1617 | |
c018ad3d | 1618 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1619 | if (!tt_global_entry) |
7683fdc1 | 1620 | goto out; |
a73105b8 | 1621 | |
db08e6e5 | 1622 | if (!roaming) { |
a513088d SE |
1623 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1624 | orig_node, message); | |
db08e6e5 SW |
1625 | |
1626 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1627 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1628 | message); | |
db08e6e5 SW |
1629 | |
1630 | goto out; | |
1631 | } | |
92f90f56 SE |
1632 | |
1633 | /* if we are deleting a global entry due to a roam | |
1634 | * event, there are two possibilities: | |
db08e6e5 SW |
1635 | * 1) the client roamed from node A to node B => if there |
1636 | * is only one originator left for this client, we mark | |
acd34afa | 1637 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1638 | * wait for node B to claim it. In case of timeout |
1639 | * the entry is purged. | |
db08e6e5 SW |
1640 | * |
1641 | * If there are other originators left, we directly delete | |
1642 | * the originator. | |
92f90f56 | 1643 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1644 | * the global entry, since it is useless now. |
1645 | */ | |
a513088d | 1646 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1647 | tt_global_entry->common.addr, |
1648 | vid); | |
a513088d | 1649 | if (local_entry) { |
db08e6e5 | 1650 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1651 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1652 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1653 | } else |
1654 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1655 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1656 | orig_node, message); | |
92f90f56 | 1657 | |
92f90f56 | 1658 | |
cc47f66e | 1659 | out: |
7683fdc1 | 1660 | if (tt_global_entry) |
a513088d SE |
1661 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1662 | if (local_entry) | |
1663 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1664 | } |
1665 | ||
95fb130d AQ |
1666 | /** |
1667 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1668 | * given originator matching the provided vid | |
1669 | * @bat_priv: the bat priv with all the soft interface information | |
1670 | * @orig_node: the originator owning the entries to remove | |
1671 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1672 | * removed | |
1673 | * @message: debug message to print as "reason" | |
1674 | */ | |
56303d34 SE |
1675 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1676 | struct batadv_orig_node *orig_node, | |
95fb130d | 1677 | int32_t match_vid, |
56303d34 | 1678 | const char *message) |
c6c8fea2 | 1679 | { |
56303d34 SE |
1680 | struct batadv_tt_global_entry *tt_global; |
1681 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1682 | uint32_t i; |
807736f6 | 1683 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1684 | struct hlist_node *safe; |
a73105b8 | 1685 | struct hlist_head *head; |
7683fdc1 | 1686 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1687 | unsigned short vid; |
c6c8fea2 | 1688 | |
6e801494 SW |
1689 | if (!hash) |
1690 | return; | |
1691 | ||
a73105b8 AQ |
1692 | for (i = 0; i < hash->size; i++) { |
1693 | head = &hash->table[i]; | |
7683fdc1 | 1694 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1695 | |
7683fdc1 | 1696 | spin_lock_bh(list_lock); |
b67bfe0d | 1697 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1698 | head, hash_entry) { |
95fb130d AQ |
1699 | /* remove only matching entries */ |
1700 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1701 | continue; | |
1702 | ||
56303d34 SE |
1703 | tt_global = container_of(tt_common_entry, |
1704 | struct batadv_tt_global_entry, | |
1705 | common); | |
db08e6e5 | 1706 | |
56303d34 | 1707 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1708 | orig_node, message); |
db08e6e5 | 1709 | |
56303d34 | 1710 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1711 | vid = tt_global->common.vid; |
39c75a51 | 1712 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1713 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1714 | tt_global->common.addr, | |
1715 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1716 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1717 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1718 | } |
a73105b8 | 1719 | } |
7683fdc1 | 1720 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1721 | } |
17071578 | 1722 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1723 | } |
1724 | ||
30cfd02b AQ |
1725 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1726 | char **msg) | |
cc47f66e | 1727 | { |
30cfd02b AQ |
1728 | bool purge = false; |
1729 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1730 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1731 | |
30cfd02b AQ |
1732 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1733 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1734 | purge = true; | |
1735 | *msg = "Roaming timeout\n"; | |
1736 | } | |
42d0b044 | 1737 | |
30cfd02b AQ |
1738 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1739 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1740 | purge = true; | |
1741 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1742 | } |
30cfd02b AQ |
1743 | |
1744 | return purge; | |
42d0b044 SE |
1745 | } |
1746 | ||
30cfd02b | 1747 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1748 | { |
807736f6 | 1749 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1750 | struct hlist_head *head; |
b67bfe0d | 1751 | struct hlist_node *node_tmp; |
7683fdc1 | 1752 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1753 | uint32_t i; |
30cfd02b AQ |
1754 | char *msg = NULL; |
1755 | struct batadv_tt_common_entry *tt_common; | |
1756 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1757 | |
cc47f66e AQ |
1758 | for (i = 0; i < hash->size; i++) { |
1759 | head = &hash->table[i]; | |
7683fdc1 | 1760 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1761 | |
7683fdc1 | 1762 | spin_lock_bh(list_lock); |
b67bfe0d | 1763 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1764 | hash_entry) { |
1765 | tt_global = container_of(tt_common, | |
1766 | struct batadv_tt_global_entry, | |
1767 | common); | |
1768 | ||
1769 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1770 | continue; | |
1771 | ||
1772 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1773 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1774 | tt_global->common.addr, | |
1775 | BATADV_PRINT_VID(tt_global->common.vid), | |
1776 | msg); | |
30cfd02b | 1777 | |
b67bfe0d | 1778 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1779 | |
1780 | batadv_tt_global_entry_free_ref(tt_global); | |
1781 | } | |
7683fdc1 | 1782 | spin_unlock_bh(list_lock); |
cc47f66e | 1783 | } |
cc47f66e AQ |
1784 | } |
1785 | ||
56303d34 | 1786 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1787 | { |
5bf74e9c | 1788 | struct batadv_hashtable *hash; |
7683fdc1 | 1789 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1790 | struct batadv_tt_common_entry *tt_common_entry; |
1791 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1792 | struct hlist_node *node_tmp; |
7683fdc1 | 1793 | struct hlist_head *head; |
c90681b8 | 1794 | uint32_t i; |
7683fdc1 | 1795 | |
807736f6 | 1796 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1797 | return; |
1798 | ||
807736f6 | 1799 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1800 | |
1801 | for (i = 0; i < hash->size; i++) { | |
1802 | head = &hash->table[i]; | |
1803 | list_lock = &hash->list_locks[i]; | |
1804 | ||
1805 | spin_lock_bh(list_lock); | |
b67bfe0d | 1806 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1807 | head, hash_entry) { |
b67bfe0d | 1808 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1809 | tt_global = container_of(tt_common_entry, |
1810 | struct batadv_tt_global_entry, | |
1811 | common); | |
1812 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1813 | } |
1814 | spin_unlock_bh(list_lock); | |
1815 | } | |
1816 | ||
1a8eaf07 | 1817 | batadv_hash_destroy(hash); |
7683fdc1 | 1818 | |
807736f6 | 1819 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1820 | } |
1821 | ||
56303d34 SE |
1822 | static bool |
1823 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1824 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1825 | { |
1826 | bool ret = false; | |
1827 | ||
acd34afa SE |
1828 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1829 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1830 | ret = true; |
1831 | ||
1832 | return ret; | |
1833 | } | |
1834 | ||
c018ad3d AQ |
1835 | /** |
1836 | * batadv_transtable_search - get the mesh destination for a given client | |
1837 | * @bat_priv: the bat priv with all the soft interface information | |
1838 | * @src: mac address of the source client | |
1839 | * @addr: mac address of the destination client | |
1840 | * @vid: VLAN identifier | |
1841 | * | |
1842 | * Returns a pointer to the originator that was selected as destination in the | |
1843 | * mesh for contacting the client 'addr', NULL otherwise. | |
1844 | * In case of multiple originators serving the same client, the function returns | |
1845 | * the best one (best in terms of metric towards the destination node). | |
1846 | * | |
1847 | * If the two clients are AP isolated the function returns NULL. | |
1848 | */ | |
56303d34 SE |
1849 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1850 | const uint8_t *src, | |
c018ad3d AQ |
1851 | const uint8_t *addr, |
1852 | unsigned short vid) | |
c6c8fea2 | 1853 | { |
56303d34 SE |
1854 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1855 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1856 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1857 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d AQ |
1858 | bool ap_isolation_enabled = false; |
1859 | struct batadv_softif_vlan *vlan; | |
c6c8fea2 | 1860 | |
b8cbd81d AQ |
1861 | /* if the AP isolation is requested on a VLAN, then check for its |
1862 | * setting in the proper VLAN private data structure | |
1863 | */ | |
1864 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
1865 | if (vlan) { | |
1866 | ap_isolation_enabled = atomic_read(&vlan->ap_isolation); | |
1867 | batadv_softif_vlan_free_ref(vlan); | |
1868 | } | |
1869 | ||
1870 | if (src && ap_isolation_enabled) { | |
c018ad3d | 1871 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1872 | if (!tt_local_entry || |
1873 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1874 | goto out; |
1875 | } | |
7aadf889 | 1876 | |
c018ad3d | 1877 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1878 | if (!tt_global_entry) |
7b36e8ee | 1879 | goto out; |
7aadf889 | 1880 | |
3d393e47 | 1881 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1882 | * isolation |
1883 | */ | |
a513088d SE |
1884 | if (tt_local_entry && |
1885 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1886 | goto out; |
1887 | ||
db08e6e5 | 1888 | rcu_read_lock(); |
4627456a | 1889 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1890 | /* found anything? */ |
981d8900 SE |
1891 | if (best_entry) |
1892 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1893 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1894 | orig_node = NULL; | |
1895 | rcu_read_unlock(); | |
981d8900 | 1896 | |
7b36e8ee | 1897 | out: |
3d393e47 | 1898 | if (tt_global_entry) |
a513088d | 1899 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1900 | if (tt_local_entry) |
a513088d | 1901 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1902 | |
7b36e8ee | 1903 | return orig_node; |
c6c8fea2 | 1904 | } |
a73105b8 | 1905 | |
ced72933 AQ |
1906 | /** |
1907 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1908 | * to the given orig_node | |
1909 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1910 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1911 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1912 | * |
1913 | * This function computes the checksum for the global table corresponding to a | |
1914 | * specific originator. In particular, the checksum is computed as follows: For | |
1915 | * each client connected to the originator the CRC32C of the MAC address and the | |
1916 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1917 | * together. | |
1918 | * | |
1919 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1920 | * produce a unique hash of the table, but since the order which is used to feed | |
1921 | * the CRC32C function affects the result and since every node in the network | |
1922 | * probably sorts the clients differently, the hash function cannot be directly | |
1923 | * computed over the entire table. Hence the CRC32C is used only on | |
1924 | * the single client entry, while all the results are then xor'ed together | |
1925 | * because the XOR operation can combine them all while trying to reduce the | |
1926 | * noise as much as possible. | |
1927 | * | |
1928 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1929 | */ |
1930 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1931 | struct batadv_orig_node *orig_node, |
1932 | unsigned short vid) | |
a73105b8 | 1933 | { |
807736f6 | 1934 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1935 | struct batadv_tt_common_entry *tt_common; |
1936 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1937 | struct hlist_head *head; |
0ffa9e8d | 1938 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
1939 | |
1940 | for (i = 0; i < hash->size; i++) { | |
1941 | head = &hash->table[i]; | |
1942 | ||
1943 | rcu_read_lock(); | |
b67bfe0d | 1944 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1945 | tt_global = container_of(tt_common, |
1946 | struct batadv_tt_global_entry, | |
1947 | common); | |
7ea7b4a1 AQ |
1948 | /* compute the CRC only for entries belonging to the |
1949 | * VLAN identified by the vid passed as parameter | |
1950 | */ | |
1951 | if (tt_common->vid != vid) | |
1952 | continue; | |
1953 | ||
db08e6e5 SW |
1954 | /* Roaming clients are in the global table for |
1955 | * consistency only. They don't have to be | |
1956 | * taken into account while computing the | |
1957 | * global crc | |
1958 | */ | |
acd34afa | 1959 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1960 | continue; |
30cfd02b AQ |
1961 | /* Temporary clients have not been announced yet, so |
1962 | * they have to be skipped while computing the global | |
1963 | * crc | |
1964 | */ | |
1965 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1966 | continue; | |
db08e6e5 SW |
1967 | |
1968 | /* find out if this global entry is announced by this | |
1969 | * originator | |
1970 | */ | |
56303d34 | 1971 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1972 | orig_node)) |
db08e6e5 SW |
1973 | continue; |
1974 | ||
0ffa9e8d AQ |
1975 | crc_tmp = crc32c(0, &tt_common->vid, |
1976 | sizeof(tt_common->vid)); | |
1977 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 AQ |
1978 | } |
1979 | rcu_read_unlock(); | |
1980 | } | |
1981 | ||
ced72933 | 1982 | return crc; |
a73105b8 AQ |
1983 | } |
1984 | ||
ced72933 AQ |
1985 | /** |
1986 | * batadv_tt_local_crc - calculates the checksum of the local table | |
1987 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 1988 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1989 | * |
1990 | * For details about the computation, please refer to the documentation for | |
1991 | * batadv_tt_global_crc(). | |
1992 | * | |
1993 | * Returns the checksum of the local table | |
ced72933 | 1994 | */ |
7ea7b4a1 AQ |
1995 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
1996 | unsigned short vid) | |
a73105b8 | 1997 | { |
807736f6 | 1998 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1999 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2000 | struct hlist_head *head; |
0ffa9e8d | 2001 | uint32_t i, crc_tmp, crc = 0; |
a73105b8 AQ |
2002 | |
2003 | for (i = 0; i < hash->size; i++) { | |
2004 | head = &hash->table[i]; | |
2005 | ||
2006 | rcu_read_lock(); | |
b67bfe0d | 2007 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2008 | /* compute the CRC only for entries belonging to the |
2009 | * VLAN identified by vid | |
2010 | */ | |
2011 | if (tt_common->vid != vid) | |
2012 | continue; | |
2013 | ||
058d0e26 | 2014 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2015 | * account while computing the CRC |
2016 | */ | |
acd34afa | 2017 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2018 | continue; |
ced72933 | 2019 | |
0ffa9e8d AQ |
2020 | crc_tmp = crc32c(0, &tt_common->vid, |
2021 | sizeof(tt_common->vid)); | |
2022 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); | |
a73105b8 | 2023 | } |
a73105b8 AQ |
2024 | rcu_read_unlock(); |
2025 | } | |
2026 | ||
ced72933 | 2027 | return crc; |
a73105b8 AQ |
2028 | } |
2029 | ||
56303d34 | 2030 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2031 | { |
56303d34 | 2032 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2033 | |
807736f6 | 2034 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2035 | |
807736f6 | 2036 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2037 | list_del(&node->list); |
2038 | kfree(node); | |
2039 | } | |
2040 | ||
807736f6 | 2041 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2042 | } |
2043 | ||
56303d34 SE |
2044 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2045 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2046 | const void *tt_buff, |
2047 | uint16_t tt_buff_len) | |
a73105b8 | 2048 | { |
a73105b8 | 2049 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2050 | * last OGM (the OGM could carry no changes) |
2051 | */ | |
a73105b8 AQ |
2052 | spin_lock_bh(&orig_node->tt_buff_lock); |
2053 | if (tt_buff_len > 0) { | |
2054 | kfree(orig_node->tt_buff); | |
2055 | orig_node->tt_buff_len = 0; | |
2056 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2057 | if (orig_node->tt_buff) { | |
2058 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2059 | orig_node->tt_buff_len = tt_buff_len; | |
2060 | } | |
2061 | } | |
2062 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2063 | } | |
2064 | ||
56303d34 | 2065 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2066 | { |
56303d34 | 2067 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2068 | |
807736f6 SE |
2069 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2070 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2071 | if (batadv_has_timed_out(node->issued_at, |
2072 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2073 | list_del(&node->list); |
2074 | kfree(node); | |
2075 | } | |
2076 | } | |
807736f6 | 2077 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2078 | } |
2079 | ||
2080 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2081 | * has already been issued for this orig_node, NULL otherwise |
2082 | */ | |
56303d34 SE |
2083 | static struct batadv_tt_req_node * |
2084 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2085 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2086 | { |
56303d34 | 2087 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2088 | |
807736f6 SE |
2089 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2090 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2091 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2092 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2093 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2094 | goto unlock; |
2095 | } | |
2096 | ||
2097 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2098 | if (!tt_req_node) | |
2099 | goto unlock; | |
2100 | ||
2101 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
2102 | tt_req_node->issued_at = jiffies; | |
2103 | ||
807736f6 | 2104 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2105 | unlock: |
807736f6 | 2106 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2107 | return tt_req_node; |
2108 | } | |
2109 | ||
335fbe0f ML |
2110 | /** |
2111 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2112 | * @entry_ptr: to be checked local tt entry | |
2113 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2114 | * | |
2115 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2116 | */ | |
2117 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2118 | { |
56303d34 | 2119 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2120 | |
acd34afa | 2121 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2122 | return 0; |
2123 | return 1; | |
2124 | } | |
2125 | ||
a513088d SE |
2126 | static int batadv_tt_global_valid(const void *entry_ptr, |
2127 | const void *data_ptr) | |
a73105b8 | 2128 | { |
56303d34 SE |
2129 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2130 | const struct batadv_tt_global_entry *tt_global_entry; | |
2131 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2132 | |
30cfd02b AQ |
2133 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2134 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2135 | return 0; |
2136 | ||
56303d34 SE |
2137 | tt_global_entry = container_of(tt_common_entry, |
2138 | struct batadv_tt_global_entry, | |
48100bac AQ |
2139 | common); |
2140 | ||
a513088d | 2141 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2142 | } |
2143 | ||
335fbe0f | 2144 | /** |
7ea7b4a1 AQ |
2145 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2146 | * specified tt hash | |
335fbe0f ML |
2147 | * @bat_priv: the bat priv with all the soft interface information |
2148 | * @hash: hash table containing the tt entries | |
2149 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2150 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2151 | * @valid_cb: function to filter tt change entries |
2152 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2153 | */ |
7ea7b4a1 AQ |
2154 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2155 | struct batadv_hashtable *hash, | |
2156 | void *tvlv_buff, uint16_t tt_len, | |
2157 | int (*valid_cb)(const void *, const void *), | |
2158 | void *cb_data) | |
a73105b8 | 2159 | { |
56303d34 | 2160 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2161 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2162 | struct hlist_head *head; |
335fbe0f | 2163 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2164 | uint32_t i; |
a73105b8 | 2165 | |
298e6e68 | 2166 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2167 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2168 | |
2169 | rcu_read_lock(); | |
2170 | for (i = 0; i < hash->size; i++) { | |
2171 | head = &hash->table[i]; | |
2172 | ||
b67bfe0d | 2173 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2174 | head, hash_entry) { |
335fbe0f | 2175 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2176 | break; |
2177 | ||
48100bac | 2178 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2179 | continue; |
2180 | ||
48100bac AQ |
2181 | memcpy(tt_change->addr, tt_common_entry->addr, |
2182 | ETH_ALEN); | |
27b37ebf | 2183 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2184 | tt_change->vid = htons(tt_common_entry->vid); |
335fbe0f | 2185 | tt_change->reserved = 0; |
a73105b8 | 2186 | |
335fbe0f | 2187 | tt_num_entries++; |
a73105b8 AQ |
2188 | tt_change++; |
2189 | } | |
2190 | } | |
2191 | rcu_read_unlock(); | |
7ea7b4a1 | 2192 | } |
a73105b8 | 2193 | |
7ea7b4a1 AQ |
2194 | /** |
2195 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2196 | * @orig_node: originator for which the CRCs have to be checked | |
2197 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2198 | * @num_vlan: number of tvlv VLAN entries | |
2199 | * @create: if true, create VLAN objects if not found | |
2200 | * | |
2201 | * Return true if all the received CRCs match the locally stored ones, false | |
2202 | * otherwise | |
2203 | */ | |
2204 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2205 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2206 | uint16_t num_vlan) | |
2207 | { | |
2208 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2209 | struct batadv_orig_node_vlan *vlan; | |
2210 | int i; | |
2211 | ||
2212 | /* check if each received CRC matches the locally stored one */ | |
2213 | for (i = 0; i < num_vlan; i++) { | |
2214 | tt_vlan_tmp = tt_vlan + i; | |
2215 | ||
2216 | /* if orig_node is a backbone node for this VLAN, don't check | |
2217 | * the CRC as we ignore all the global entries over it | |
2218 | */ | |
2219 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2220 | orig_node->orig, |
2221 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2222 | continue; |
2223 | ||
2224 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2225 | ntohs(tt_vlan_tmp->vid)); | |
2226 | if (!vlan) | |
2227 | return false; | |
2228 | ||
2229 | if (vlan->tt.crc != ntohl(tt_vlan_tmp->crc)) | |
2230 | return false; | |
2231 | } | |
2232 | ||
2233 | return true; | |
2234 | } | |
2235 | ||
2236 | /** | |
2237 | * batadv_tt_local_update_crc - update all the local CRCs | |
2238 | * @bat_priv: the bat priv with all the soft interface information | |
2239 | */ | |
2240 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2241 | { | |
2242 | struct batadv_softif_vlan *vlan; | |
2243 | ||
2244 | /* recompute the global CRC for each VLAN */ | |
2245 | rcu_read_lock(); | |
2246 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2247 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2248 | } | |
2249 | rcu_read_unlock(); | |
2250 | } | |
2251 | ||
2252 | /** | |
2253 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2254 | * @bat_priv: the bat priv with all the soft interface information | |
2255 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2256 | */ | |
2257 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2258 | struct batadv_orig_node *orig_node) | |
2259 | { | |
2260 | struct batadv_orig_node_vlan *vlan; | |
2261 | uint32_t crc; | |
2262 | ||
2263 | /* recompute the global CRC for each VLAN */ | |
2264 | rcu_read_lock(); | |
2265 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2266 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2267 | * the CRC as we ignore all the global entries over it | |
2268 | */ | |
cfd4f757 AQ |
2269 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2270 | vlan->vid)) | |
7ea7b4a1 AQ |
2271 | continue; |
2272 | ||
2273 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2274 | vlan->tt.crc = crc; | |
2275 | } | |
2276 | rcu_read_unlock(); | |
a73105b8 AQ |
2277 | } |
2278 | ||
ced72933 AQ |
2279 | /** |
2280 | * batadv_send_tt_request - send a TT Request message to a given node | |
2281 | * @bat_priv: the bat priv with all the soft interface information | |
2282 | * @dst_orig_node: the destination of the message | |
2283 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2284 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2285 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2286 | * @full_table: ask for the entire translation table if true, while only for the |
2287 | * last TT diff otherwise | |
2288 | */ | |
56303d34 SE |
2289 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2290 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2291 | uint8_t ttvn, |
2292 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2293 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2294 | { |
335fbe0f | 2295 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2296 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2297 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2298 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2299 | bool ret = false; |
7ea7b4a1 | 2300 | int i, size; |
a73105b8 | 2301 | |
e5d89254 | 2302 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2303 | if (!primary_if) |
2304 | goto out; | |
2305 | ||
2306 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2307 | * reply from the same orig_node yet |
2308 | */ | |
a513088d | 2309 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2310 | if (!tt_req_node) |
2311 | goto out; | |
2312 | ||
7ea7b4a1 AQ |
2313 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2314 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2315 | if (!tvlv_tt_data) |
a73105b8 AQ |
2316 | goto out; |
2317 | ||
335fbe0f ML |
2318 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2319 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2320 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2321 | ||
2322 | /* send all the CRCs within the request. This is needed by intermediate | |
2323 | * nodes to ensure they have the correct table before replying | |
2324 | */ | |
2325 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2326 | for (i = 0; i < num_vlan; i++) { | |
2327 | tt_vlan_req->vid = tt_vlan->vid; | |
2328 | tt_vlan_req->crc = tt_vlan->crc; | |
2329 | ||
2330 | tt_vlan_req++; | |
2331 | tt_vlan++; | |
2332 | } | |
a73105b8 AQ |
2333 | |
2334 | if (full_table) | |
335fbe0f | 2335 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2336 | |
bb351ba0 | 2337 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2338 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2339 | |
d69909d2 | 2340 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2341 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2342 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2343 | tvlv_tt_data, size); |
335fbe0f | 2344 | ret = true; |
a73105b8 AQ |
2345 | |
2346 | out: | |
a73105b8 | 2347 | if (primary_if) |
e5d89254 | 2348 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2349 | if (ret && tt_req_node) { |
807736f6 | 2350 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2351 | list_del(&tt_req_node->list); |
807736f6 | 2352 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2353 | kfree(tt_req_node); |
2354 | } | |
335fbe0f | 2355 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2356 | return ret; |
2357 | } | |
2358 | ||
335fbe0f ML |
2359 | /** |
2360 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2361 | * node's translation table | |
2362 | * @bat_priv: the bat priv with all the soft interface information | |
2363 | * @tt_data: tt data containing the tt request information | |
2364 | * @req_src: mac address of tt request sender | |
2365 | * @req_dst: mac address of tt request recipient | |
2366 | * | |
2367 | * Returns true if tt request reply was sent, false otherwise. | |
2368 | */ | |
2369 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2370 | struct batadv_tvlv_tt_data *tt_data, | |
2371 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2372 | { |
170173bf | 2373 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2374 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2375 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2376 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2377 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2378 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2379 | uint8_t orig_ttvn, req_ttvn; |
2380 | uint16_t tvlv_len; | |
2381 | int32_t tt_len; | |
a73105b8 | 2382 | |
39c75a51 | 2383 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2384 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2385 | req_src, tt_data->ttvn, req_dst, |
2386 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2387 | |
2388 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2389 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2390 | if (!req_dst_orig_node) |
2391 | goto out; | |
2392 | ||
335fbe0f | 2393 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2394 | if (!res_dst_orig_node) |
2395 | goto out; | |
2396 | ||
a73105b8 | 2397 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2398 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2399 | |
7ea7b4a1 | 2400 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2401 | /* this node doesn't have the requested data */ |
a73105b8 | 2402 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2403 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2404 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2405 | goto out; |
2406 | ||
015758d0 | 2407 | /* If the full table has been explicitly requested */ |
335fbe0f | 2408 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2409 | !req_dst_orig_node->tt_buff) |
2410 | full_table = true; | |
2411 | else | |
2412 | full_table = false; | |
2413 | ||
335fbe0f ML |
2414 | /* TT fragmentation hasn't been implemented yet, so send as many |
2415 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2416 | */ |
a73105b8 AQ |
2417 | if (!full_table) { |
2418 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2419 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2420 | |
7ea7b4a1 AQ |
2421 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2422 | &tvlv_tt_data, | |
2423 | &tt_change, | |
2424 | &tt_len); | |
2425 | if (!tt_len) | |
a73105b8 AQ |
2426 | goto unlock; |
2427 | ||
a73105b8 | 2428 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2429 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2430 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2431 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2432 | } else { | |
7ea7b4a1 AQ |
2433 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2434 | * in the initial part | |
2435 | */ | |
2436 | tt_len = -1; | |
2437 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2438 | &tvlv_tt_data, | |
2439 | &tt_change, | |
2440 | &tt_len); | |
2441 | if (!tt_len) | |
a73105b8 | 2442 | goto out; |
7ea7b4a1 AQ |
2443 | |
2444 | /* fill the rest of the tvlv with the real TT entries */ | |
2445 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2446 | tt_change, tt_len, | |
2447 | batadv_tt_global_valid, | |
2448 | req_dst_orig_node); | |
a73105b8 AQ |
2449 | } |
2450 | ||
a19d3d85 ML |
2451 | /* Don't send the response, if larger than fragmented packet. */ |
2452 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2453 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2454 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2455 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2456 | res_dst_orig_node->orig); | |
2457 | goto out; | |
2458 | } | |
2459 | ||
335fbe0f ML |
2460 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2461 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2462 | |
2463 | if (full_table) | |
335fbe0f | 2464 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2465 | |
39c75a51 | 2466 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2467 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2468 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2469 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2470 | |
d69909d2 | 2471 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2472 | |
335fbe0f | 2473 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2474 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2475 | tvlv_len); | |
e91ecfc6 | 2476 | |
335fbe0f | 2477 | ret = true; |
a73105b8 AQ |
2478 | goto out; |
2479 | ||
2480 | unlock: | |
2481 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2482 | ||
2483 | out: | |
2484 | if (res_dst_orig_node) | |
7d211efc | 2485 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2486 | if (req_dst_orig_node) |
7d211efc | 2487 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2488 | kfree(tvlv_tt_data); |
a73105b8 | 2489 | return ret; |
a73105b8 | 2490 | } |
96412690 | 2491 | |
335fbe0f ML |
2492 | /** |
2493 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2494 | * translation table | |
2495 | * @bat_priv: the bat priv with all the soft interface information | |
2496 | * @tt_data: tt data containing the tt request information | |
2497 | * @req_src: mac address of tt request sender | |
2498 | * | |
2499 | * Returns true if tt request reply was sent, false otherwise. | |
2500 | */ | |
2501 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2502 | struct batadv_tvlv_tt_data *tt_data, | |
2503 | uint8_t *req_src) | |
a73105b8 | 2504 | { |
335fbe0f | 2505 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2506 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2507 | struct batadv_tvlv_tt_change *tt_change; |
2508 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2509 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2510 | uint16_t tvlv_len; |
a73105b8 | 2511 | bool full_table; |
7ea7b4a1 | 2512 | int32_t tt_len; |
a73105b8 | 2513 | |
39c75a51 | 2514 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2515 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2516 | req_src, tt_data->ttvn, |
2517 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2518 | |
a70a9aa9 | 2519 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2520 | |
807736f6 | 2521 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2522 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2523 | |
335fbe0f | 2524 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2525 | if (!orig_node) |
2526 | goto out; | |
2527 | ||
e5d89254 | 2528 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2529 | if (!primary_if) |
2530 | goto out; | |
2531 | ||
2532 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2533 | * is too big send the whole local translation table |
2534 | */ | |
335fbe0f | 2535 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2536 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2537 | full_table = true; |
2538 | else | |
2539 | full_table = false; | |
2540 | ||
335fbe0f ML |
2541 | /* TT fragmentation hasn't been implemented yet, so send as many |
2542 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2543 | */ |
a73105b8 | 2544 | if (!full_table) { |
807736f6 | 2545 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2546 | |
7ea7b4a1 AQ |
2547 | tt_len = bat_priv->tt.last_changeset_len; |
2548 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2549 | &tvlv_tt_data, | |
2550 | &tt_change, | |
2551 | &tt_len); | |
2552 | if (!tt_len) | |
a73105b8 AQ |
2553 | goto unlock; |
2554 | ||
335fbe0f | 2555 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2556 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2557 | bat_priv->tt.last_changeset_len); |
2558 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2559 | } else { |
335fbe0f ML |
2560 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2561 | ||
7ea7b4a1 AQ |
2562 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2563 | * in the initial part | |
2564 | */ | |
2565 | tt_len = -1; | |
2566 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2567 | &tvlv_tt_data, | |
2568 | &tt_change, | |
2569 | &tt_len); | |
2570 | if (!tt_len) | |
a73105b8 | 2571 | goto out; |
7ea7b4a1 AQ |
2572 | |
2573 | /* fill the rest of the tvlv with the real TT entries */ | |
2574 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2575 | tt_change, tt_len, | |
2576 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2577 | } |
2578 | ||
335fbe0f ML |
2579 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2580 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2581 | |
2582 | if (full_table) | |
335fbe0f | 2583 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2584 | |
39c75a51 | 2585 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2586 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2587 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2588 | |
d69909d2 | 2589 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2590 | |
335fbe0f | 2591 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2592 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2593 | tvlv_len); | |
335fbe0f | 2594 | |
a73105b8 AQ |
2595 | goto out; |
2596 | ||
2597 | unlock: | |
807736f6 | 2598 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2599 | out: |
a70a9aa9 | 2600 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2601 | if (orig_node) |
7d211efc | 2602 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2603 | if (primary_if) |
e5d89254 | 2604 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2605 | kfree(tvlv_tt_data); |
2606 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2607 | return true; |
2608 | } | |
2609 | ||
335fbe0f ML |
2610 | /** |
2611 | * batadv_send_tt_response - send reply to tt request | |
2612 | * @bat_priv: the bat priv with all the soft interface information | |
2613 | * @tt_data: tt data containing the tt request information | |
2614 | * @req_src: mac address of tt request sender | |
2615 | * @req_dst: mac address of tt request recipient | |
2616 | * | |
2617 | * Returns true if tt request reply was sent, false otherwise. | |
2618 | */ | |
2619 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2620 | struct batadv_tvlv_tt_data *tt_data, | |
2621 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2622 | { |
cfd4f757 | 2623 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2624 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2625 | else |
335fbe0f ML |
2626 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2627 | req_src, req_dst); | |
a73105b8 AQ |
2628 | } |
2629 | ||
56303d34 SE |
2630 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2631 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2632 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2633 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2634 | { |
2635 | int i; | |
a513088d | 2636 | int roams; |
a73105b8 AQ |
2637 | |
2638 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2639 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2640 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2641 | batadv_tt_global_del(bat_priv, orig_node, |
2642 | (tt_change + i)->addr, | |
c018ad3d | 2643 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2644 | "tt removed by changes", |
2645 | roams); | |
08c36d3e | 2646 | } else { |
08c36d3e | 2647 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2648 | (tt_change + i)->addr, |
c018ad3d | 2649 | ntohs((tt_change + i)->vid), |
d4f44692 | 2650 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2651 | /* In case of problem while storing a |
2652 | * global_entry, we stop the updating | |
2653 | * procedure without committing the | |
2654 | * ttvn change. This will avoid to send | |
2655 | * corrupted data on tt_request | |
2656 | */ | |
2657 | return; | |
08c36d3e | 2658 | } |
a73105b8 | 2659 | } |
17071578 | 2660 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2661 | } |
2662 | ||
56303d34 | 2663 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2664 | struct batadv_tvlv_tt_change *tt_change, |
2665 | uint8_t ttvn, uint8_t *resp_src, | |
2666 | uint16_t num_entries) | |
a73105b8 | 2667 | { |
170173bf | 2668 | struct batadv_orig_node *orig_node; |
a73105b8 | 2669 | |
335fbe0f | 2670 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2671 | if (!orig_node) |
2672 | goto out; | |
2673 | ||
2674 | /* Purge the old table first.. */ | |
95fb130d AQ |
2675 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2676 | "Received full table"); | |
a73105b8 | 2677 | |
7ea7b4a1 AQ |
2678 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2679 | ttvn); | |
a73105b8 AQ |
2680 | |
2681 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2682 | kfree(orig_node->tt_buff); | |
2683 | orig_node->tt_buff_len = 0; | |
2684 | orig_node->tt_buff = NULL; | |
2685 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2686 | ||
7ea7b4a1 | 2687 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2688 | |
2689 | out: | |
2690 | if (orig_node) | |
7d211efc | 2691 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2692 | } |
2693 | ||
56303d34 SE |
2694 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2695 | struct batadv_orig_node *orig_node, | |
a513088d | 2696 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2697 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2698 | { |
a513088d SE |
2699 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2700 | tt_num_changes, ttvn); | |
a73105b8 | 2701 | |
e8cf234a AQ |
2702 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2703 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2704 | atomic_set(&orig_node->last_ttvn, ttvn); |
2705 | } | |
2706 | ||
c018ad3d AQ |
2707 | /** |
2708 | * batadv_is_my_client - check if a client is served by the local node | |
2709 | * @bat_priv: the bat priv with all the soft interface information | |
2710 | * @addr: the mac adress of the client to check | |
2711 | * @vid: VLAN identifier | |
2712 | * | |
2713 | * Returns true if the client is served by this node, false otherwise. | |
2714 | */ | |
2715 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2716 | unsigned short vid) | |
a73105b8 | 2717 | { |
170173bf | 2718 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2719 | bool ret = false; |
a73105b8 | 2720 | |
c018ad3d | 2721 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2722 | if (!tt_local_entry) |
2723 | goto out; | |
058d0e26 | 2724 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2725 | * consistency purpose) |
2726 | */ | |
7c1fd91d AQ |
2727 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2728 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2729 | goto out; |
7683fdc1 AQ |
2730 | ret = true; |
2731 | out: | |
a73105b8 | 2732 | if (tt_local_entry) |
a513088d | 2733 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2734 | return ret; |
a73105b8 AQ |
2735 | } |
2736 | ||
335fbe0f ML |
2737 | /** |
2738 | * batadv_handle_tt_response - process incoming tt reply | |
2739 | * @bat_priv: the bat priv with all the soft interface information | |
2740 | * @tt_data: tt data containing the tt request information | |
2741 | * @resp_src: mac address of tt reply sender | |
2742 | * @num_entries: number of tt change entries appended to the tt data | |
2743 | */ | |
2744 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2745 | struct batadv_tvlv_tt_data *tt_data, | |
2746 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2747 | { |
56303d34 SE |
2748 | struct batadv_tt_req_node *node, *safe; |
2749 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2750 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2751 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2752 | uint16_t change_offset; | |
a73105b8 | 2753 | |
39c75a51 | 2754 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2755 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2756 | resp_src, tt_data->ttvn, num_entries, |
2757 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2758 | |
335fbe0f | 2759 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2760 | if (!orig_node) |
2761 | goto out; | |
2762 | ||
a70a9aa9 AQ |
2763 | spin_lock_bh(&orig_node->tt_lock); |
2764 | ||
7ea7b4a1 AQ |
2765 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2766 | change_offset *= ntohs(tt_data->num_vlan); | |
2767 | change_offset += sizeof(*tt_data); | |
2768 | tvlv_ptr += change_offset; | |
2769 | ||
2770 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2771 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2772 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2773 | resp_src, num_entries); | |
96412690 | 2774 | } else { |
335fbe0f ML |
2775 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2776 | tt_data->ttvn, tt_change); | |
96412690 | 2777 | } |
a73105b8 | 2778 | |
a70a9aa9 | 2779 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2780 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2781 | |
2782 | spin_unlock_bh(&orig_node->tt_lock); | |
2783 | ||
a73105b8 | 2784 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2785 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2786 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2787 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2788 | continue; |
2789 | list_del(&node->list); | |
2790 | kfree(node); | |
2791 | } | |
7ea7b4a1 | 2792 | |
807736f6 | 2793 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2794 | out: |
2795 | if (orig_node) | |
7d211efc | 2796 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2797 | } |
2798 | ||
56303d34 | 2799 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2800 | { |
56303d34 | 2801 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2802 | |
807736f6 | 2803 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2804 | |
807736f6 | 2805 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2806 | list_del(&node->list); |
2807 | kfree(node); | |
2808 | } | |
2809 | ||
807736f6 | 2810 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2811 | } |
2812 | ||
56303d34 | 2813 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2814 | { |
56303d34 | 2815 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2816 | |
807736f6 SE |
2817 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2818 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2819 | if (!batadv_has_timed_out(node->first_time, |
2820 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2821 | continue; |
2822 | ||
2823 | list_del(&node->list); | |
2824 | kfree(node); | |
2825 | } | |
807736f6 | 2826 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2827 | } |
2828 | ||
2829 | /* This function checks whether the client already reached the | |
2830 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2831 | * will not be sent. | |
2832 | * | |
9cfc7bd6 SE |
2833 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2834 | */ | |
56303d34 | 2835 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2836 | uint8_t *client) |
cc47f66e | 2837 | { |
56303d34 | 2838 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2839 | bool ret = false; |
2840 | ||
807736f6 | 2841 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2842 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2843 | * reply from the same orig_node yet |
2844 | */ | |
807736f6 | 2845 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2846 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2847 | continue; |
2848 | ||
1eda58bf | 2849 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2850 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2851 | continue; |
2852 | ||
3e34819e | 2853 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2854 | /* Sorry, you roamed too many times! */ |
2855 | goto unlock; | |
2856 | ret = true; | |
2857 | break; | |
2858 | } | |
2859 | ||
2860 | if (!ret) { | |
2861 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2862 | if (!tt_roam_node) | |
2863 | goto unlock; | |
2864 | ||
2865 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2866 | atomic_set(&tt_roam_node->counter, |
2867 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2868 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2869 | ||
807736f6 | 2870 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2871 | ret = true; |
2872 | } | |
2873 | ||
2874 | unlock: | |
807736f6 | 2875 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2876 | return ret; |
2877 | } | |
2878 | ||
c018ad3d AQ |
2879 | /** |
2880 | * batadv_send_roam_adv - send a roaming advertisement message | |
2881 | * @bat_priv: the bat priv with all the soft interface information | |
2882 | * @client: mac address of the roaming client | |
2883 | * @vid: VLAN identifier | |
2884 | * @orig_node: message destination | |
2885 | * | |
2886 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2887 | * client. This is done to inform the node that from now on all traffic destined | |
2888 | * for this particular roamed client has to be forwarded to the sender of the | |
2889 | * roaming message. | |
2890 | */ | |
56303d34 | 2891 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2892 | unsigned short vid, |
56303d34 | 2893 | struct batadv_orig_node *orig_node) |
cc47f66e | 2894 | { |
56303d34 | 2895 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2896 | struct batadv_tvlv_roam_adv tvlv_roam; |
2897 | ||
2898 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2899 | if (!primary_if) | |
2900 | goto out; | |
cc47f66e AQ |
2901 | |
2902 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2903 | * already roamed to us too many times |
2904 | */ | |
a513088d | 2905 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2906 | goto out; |
2907 | ||
39c75a51 | 2908 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2909 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2910 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2911 | |
d69909d2 | 2912 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2913 | |
122edaa0 | 2914 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2915 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2916 | |
2917 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2918 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2919 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2920 | |
2921 | out: | |
122edaa0 ML |
2922 | if (primary_if) |
2923 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2924 | } |
2925 | ||
a513088d | 2926 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2927 | { |
56303d34 | 2928 | struct delayed_work *delayed_work; |
807736f6 | 2929 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2930 | struct batadv_priv *bat_priv; |
2931 | ||
2932 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2933 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2934 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2935 | |
a19d3d85 | 2936 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 2937 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2938 | batadv_tt_req_purge(bat_priv); |
2939 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2940 | |
72414442 AQ |
2941 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2942 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2943 | } |
cc47f66e | 2944 | |
56303d34 | 2945 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2946 | { |
e1bf0c14 ML |
2947 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2948 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
2949 | ||
807736f6 | 2950 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2951 | |
a513088d SE |
2952 | batadv_tt_local_table_free(bat_priv); |
2953 | batadv_tt_global_table_free(bat_priv); | |
2954 | batadv_tt_req_list_free(bat_priv); | |
2955 | batadv_tt_changes_list_free(bat_priv); | |
2956 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2957 | |
807736f6 | 2958 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2959 | } |
058d0e26 | 2960 | |
7ea7b4a1 AQ |
2961 | /** |
2962 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
2963 | * table and possibly count them in the TT size | |
2964 | * @bat_priv: the bat priv with all the soft interface information | |
2965 | * @flags: the flag to switch | |
2966 | * @enable: whether to set or unset the flag | |
2967 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 2968 | */ |
7ea7b4a1 AQ |
2969 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
2970 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 2971 | { |
7ea7b4a1 AQ |
2972 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
2973 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 2974 | uint16_t changed_num = 0; |
058d0e26 | 2975 | struct hlist_head *head; |
7ea7b4a1 | 2976 | uint32_t i; |
058d0e26 AQ |
2977 | |
2978 | if (!hash) | |
7ea7b4a1 | 2979 | return; |
058d0e26 AQ |
2980 | |
2981 | for (i = 0; i < hash->size; i++) { | |
2982 | head = &hash->table[i]; | |
2983 | ||
2984 | rcu_read_lock(); | |
b67bfe0d | 2985 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2986 | head, hash_entry) { |
697f2531 AQ |
2987 | if (enable) { |
2988 | if ((tt_common_entry->flags & flags) == flags) | |
2989 | continue; | |
2990 | tt_common_entry->flags |= flags; | |
2991 | } else { | |
2992 | if (!(tt_common_entry->flags & flags)) | |
2993 | continue; | |
2994 | tt_common_entry->flags &= ~flags; | |
2995 | } | |
2996 | changed_num++; | |
7ea7b4a1 AQ |
2997 | |
2998 | if (!count) | |
2999 | continue; | |
3000 | ||
3001 | batadv_tt_local_size_inc(bat_priv, | |
3002 | tt_common_entry->vid); | |
058d0e26 AQ |
3003 | } |
3004 | rcu_read_unlock(); | |
3005 | } | |
058d0e26 AQ |
3006 | } |
3007 | ||
acd34afa | 3008 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3009 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3010 | { |
807736f6 | 3011 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3012 | struct batadv_tt_common_entry *tt_common; |
3013 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3014 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3015 | struct hlist_head *head; |
3016 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3017 | uint32_t i; |
058d0e26 AQ |
3018 | |
3019 | if (!hash) | |
3020 | return; | |
3021 | ||
3022 | for (i = 0; i < hash->size; i++) { | |
3023 | head = &hash->table[i]; | |
3024 | list_lock = &hash->list_locks[i]; | |
3025 | ||
3026 | spin_lock_bh(list_lock); | |
b67bfe0d | 3027 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3028 | hash_entry) { |
3029 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3030 | continue; |
3031 | ||
39c75a51 | 3032 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3033 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3034 | tt_common->addr, | |
3035 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3036 | |
7ea7b4a1 | 3037 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3038 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3039 | tt_local = container_of(tt_common, |
3040 | struct batadv_tt_local_entry, | |
3041 | common); | |
3042 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
3043 | } |
3044 | spin_unlock_bh(list_lock); | |
3045 | } | |
058d0e26 AQ |
3046 | } |
3047 | ||
e1bf0c14 | 3048 | /** |
a19d3d85 ML |
3049 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3050 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3051 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3052 | * |
3053 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3054 | */ |
a19d3d85 | 3055 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3056 | { |
e1bf0c14 ML |
3057 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3058 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3059 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3060 | return; |
e1bf0c14 | 3061 | } |
be9aa4c1 | 3062 | |
7ea7b4a1 | 3063 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3064 | |
a513088d | 3065 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3066 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3067 | |
3068 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3069 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3070 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3071 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3072 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3073 | |
3074 | /* reset the sending counter */ | |
807736f6 | 3075 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3076 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3077 | } |
a70a9aa9 | 3078 | |
a19d3d85 ML |
3079 | /** |
3080 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3081 | * have been queued in the time since the last commit | |
3082 | * @bat_priv: the bat priv with all the soft interface information | |
3083 | */ | |
3084 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3085 | { | |
3086 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3087 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3088 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3089 | } |
59b699cd | 3090 | |
56303d34 | 3091 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3092 | uint8_t *dst, unsigned short vid) |
59b699cd | 3093 | { |
56303d34 SE |
3094 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3095 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3096 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3097 | bool ret = false; |
59b699cd | 3098 | |
b8cbd81d AQ |
3099 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3100 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3101 | goto out; |
59b699cd | 3102 | |
b8cbd81d | 3103 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3104 | if (!tt_local_entry) |
3105 | goto out; | |
3106 | ||
b8cbd81d | 3107 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3108 | if (!tt_global_entry) |
3109 | goto out; | |
3110 | ||
1f129fef | 3111 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3112 | goto out; |
3113 | ||
5870adc6 | 3114 | ret = true; |
59b699cd AQ |
3115 | |
3116 | out: | |
b8cbd81d AQ |
3117 | if (vlan) |
3118 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3119 | if (tt_global_entry) |
a513088d | 3120 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3121 | if (tt_local_entry) |
a513088d | 3122 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3123 | return ret; |
3124 | } | |
a943cac1 | 3125 | |
e1bf0c14 ML |
3126 | /** |
3127 | * batadv_tt_update_orig - update global translation table with new tt | |
3128 | * information received via ogms | |
3129 | * @bat_priv: the bat priv with all the soft interface information | |
3130 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3131 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3132 | * @tt_num_vlan: number of tvlv VLAN entries | |
3133 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3134 | * @tt_num_changes: number of tt changes inside the tt buffer |
3135 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3136 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3137 | */ |
3138 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3139 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3140 | const void *tt_buff, uint16_t tt_num_vlan, |
3141 | struct batadv_tvlv_tt_change *tt_change, | |
3142 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3143 | { |
3144 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3145 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 ML |
3146 | bool full_table = true; |
3147 | ||
7ea7b4a1 | 3148 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
17071578 | 3149 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3150 | * increased by one -> we can apply the attached changes |
3151 | */ | |
17071578 AQ |
3152 | if ((!orig_node->tt_initialised && ttvn == 1) || |
3153 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 3154 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3155 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3156 | * times. | |
9cfc7bd6 SE |
3157 | * In this case send a tt request |
3158 | */ | |
a943cac1 ML |
3159 | if (!tt_num_changes) { |
3160 | full_table = false; | |
3161 | goto request_table; | |
3162 | } | |
3163 | ||
a70a9aa9 AQ |
3164 | spin_lock_bh(&orig_node->tt_lock); |
3165 | ||
335fbe0f | 3166 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 3167 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3168 | ttvn, tt_change); |
a943cac1 ML |
3169 | |
3170 | /* Even if we received the precomputed crc with the OGM, we | |
3171 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3172 | * in the global table |
3173 | */ | |
7ea7b4a1 | 3174 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3175 | |
a70a9aa9 AQ |
3176 | spin_unlock_bh(&orig_node->tt_lock); |
3177 | ||
a943cac1 ML |
3178 | /* The ttvn alone is not enough to guarantee consistency |
3179 | * because a single value could represent different states | |
3180 | * (due to the wrap around). Thus a node has to check whether | |
3181 | * the resulting table (after applying the changes) is still | |
3182 | * consistent or not. E.g. a node could disconnect while its | |
3183 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3184 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3185 | * inconsistency |
3186 | */ | |
7ea7b4a1 AQ |
3187 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3188 | tt_num_vlan)) | |
a943cac1 | 3189 | goto request_table; |
a943cac1 ML |
3190 | } else { |
3191 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3192 | * in sync anymore -> request fresh tt data |
3193 | */ | |
17071578 | 3194 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3195 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3196 | tt_num_vlan)) { | |
a943cac1 | 3197 | request_table: |
39c75a51 | 3198 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3199 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3200 | orig_node->orig, ttvn, orig_ttvn, | |
3201 | tt_num_changes); | |
a513088d | 3202 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3203 | tt_vlan, tt_num_vlan, |
3204 | full_table); | |
a943cac1 ML |
3205 | return; |
3206 | } | |
3207 | } | |
3208 | } | |
3275e7cc | 3209 | |
c018ad3d AQ |
3210 | /** |
3211 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3212 | * @bat_priv: the bat priv with all the soft interface information | |
3213 | * @addr: the mac address of the client to check | |
3214 | * @vid: VLAN identifier | |
3215 | * | |
3216 | * Returns true if we know that the client has moved from its old originator | |
3217 | * to another one. This entry is still kept for consistency purposes and will be | |
3218 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3219 | */ |
56303d34 | 3220 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3221 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3222 | { |
56303d34 | 3223 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3224 | bool ret = false; |
3225 | ||
c018ad3d | 3226 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3227 | if (!tt_global_entry) |
3228 | goto out; | |
3229 | ||
c1d07431 | 3230 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3231 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3232 | out: |
3233 | return ret; | |
3234 | } | |
30cfd02b | 3235 | |
7c1fd91d AQ |
3236 | /** |
3237 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3238 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3239 | * @addr: the mac address of the local client to query |
3240 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3241 | * |
3242 | * Returns true if the local client is known to be roaming (it is not served by | |
3243 | * this node anymore) or not. If yes, the client is still present in the table | |
3244 | * to keep the latter consistent with the node TTVN | |
3245 | */ | |
3246 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3247 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3248 | { |
3249 | struct batadv_tt_local_entry *tt_local_entry; | |
3250 | bool ret = false; | |
3251 | ||
c018ad3d | 3252 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3253 | if (!tt_local_entry) |
3254 | goto out; | |
3255 | ||
3256 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3257 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3258 | out: | |
3259 | return ret; | |
7c1fd91d AQ |
3260 | } |
3261 | ||
30cfd02b AQ |
3262 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3263 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3264 | const unsigned char *addr, |
16052789 | 3265 | unsigned short vid) |
30cfd02b AQ |
3266 | { |
3267 | bool ret = false; | |
3268 | ||
16052789 | 3269 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3270 | BATADV_TT_CLIENT_TEMP, |
3271 | atomic_read(&orig_node->last_ttvn))) | |
3272 | goto out; | |
3273 | ||
3274 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3275 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3276 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3277 | ret = true; |
3278 | out: | |
3279 | return ret; | |
3280 | } | |
e1bf0c14 | 3281 | |
a19d3d85 ML |
3282 | /** |
3283 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3284 | * maximum packet size that can be transported through the mesh | |
3285 | * @soft_iface: netdev struct of the mesh interface | |
3286 | * | |
3287 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3288 | * to be removed. | |
3289 | */ | |
3290 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3291 | { | |
3292 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3293 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3294 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3295 | bool reduced = false; | |
3296 | ||
3297 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3298 | ||
3299 | while (true) { | |
3300 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3301 | if (packet_size_max >= table_size) | |
3302 | break; | |
3303 | ||
3304 | batadv_tt_local_purge(bat_priv, timeout); | |
3305 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3306 | ||
3307 | timeout /= 2; | |
3308 | reduced = true; | |
3309 | net_ratelimited_function(batadv_info, soft_iface, | |
3310 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3311 | packet_size_max); | |
3312 | } | |
3313 | ||
3314 | /* commit these changes immediately, to avoid synchronization problem | |
3315 | * with the TTVN | |
3316 | */ | |
3317 | if (reduced) | |
3318 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3319 | ||
3320 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3321 | } | |
3322 | ||
e1bf0c14 ML |
3323 | /** |
3324 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3325 | * @bat_priv: the bat priv with all the soft interface information | |
3326 | * @orig: the orig_node of the ogm | |
3327 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3328 | * @tvlv_value: tvlv buffer containing the gateway data | |
3329 | * @tvlv_value_len: tvlv buffer length | |
3330 | */ | |
3331 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3332 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3333 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3334 | uint16_t tvlv_value_len) |
3335 | { | |
7ea7b4a1 AQ |
3336 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3337 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3338 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3339 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3340 | |
3341 | if (tvlv_value_len < sizeof(*tt_data)) | |
3342 | return; | |
3343 | ||
3344 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3345 | tvlv_value_len -= sizeof(*tt_data); | |
3346 | ||
7ea7b4a1 AQ |
3347 | num_vlan = ntohs(tt_data->num_vlan); |
3348 | ||
3349 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3350 | return; | |
3351 | ||
3352 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3353 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3354 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3355 | ||
298e6e68 | 3356 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3357 | |
7ea7b4a1 AQ |
3358 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3359 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3360 | } |
3361 | ||
335fbe0f ML |
3362 | /** |
3363 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3364 | * container | |
3365 | * @bat_priv: the bat priv with all the soft interface information | |
3366 | * @src: mac address of tt tvlv sender | |
3367 | * @dst: mac address of tt tvlv recipient | |
3368 | * @tvlv_value: tvlv buffer containing the tt data | |
3369 | * @tvlv_value_len: tvlv buffer length | |
3370 | * | |
3371 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3372 | * otherwise. | |
3373 | */ | |
3374 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3375 | uint8_t *src, uint8_t *dst, | |
3376 | void *tvlv_value, | |
3377 | uint16_t tvlv_value_len) | |
3378 | { | |
3379 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3380 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3381 | char tt_flag; |
3382 | bool ret; | |
3383 | ||
3384 | if (tvlv_value_len < sizeof(*tt_data)) | |
3385 | return NET_RX_SUCCESS; | |
3386 | ||
3387 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3388 | tvlv_value_len -= sizeof(*tt_data); | |
3389 | ||
7ea7b4a1 AQ |
3390 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3391 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3392 | ||
3393 | if (tvlv_value_len < tt_vlan_len) | |
3394 | return NET_RX_SUCCESS; | |
3395 | ||
3396 | tvlv_value_len -= tt_vlan_len; | |
3397 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3398 | |
3399 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3400 | case BATADV_TT_REQUEST: | |
3401 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3402 | ||
3403 | /* If this node cannot provide a TT response the tt_request is | |
3404 | * forwarded | |
3405 | */ | |
3406 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3407 | if (!ret) { | |
3408 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3409 | tt_flag = 'F'; | |
3410 | else | |
3411 | tt_flag = '.'; | |
3412 | ||
3413 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3414 | "Routing TT_REQUEST to %pM [%c]\n", | |
3415 | dst, tt_flag); | |
3416 | /* tvlv API will re-route the packet */ | |
3417 | return NET_RX_DROP; | |
3418 | } | |
3419 | break; | |
3420 | case BATADV_TT_RESPONSE: | |
3421 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3422 | ||
3423 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3424 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3425 | src, tt_num_entries); |
335fbe0f ML |
3426 | return NET_RX_SUCCESS; |
3427 | } | |
3428 | ||
3429 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3430 | tt_flag = 'F'; | |
3431 | else | |
3432 | tt_flag = '.'; | |
3433 | ||
3434 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3435 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3436 | ||
3437 | /* tvlv API will re-route the packet */ | |
3438 | return NET_RX_DROP; | |
3439 | } | |
3440 | ||
3441 | return NET_RX_SUCCESS; | |
3442 | } | |
3443 | ||
122edaa0 ML |
3444 | /** |
3445 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3446 | * @bat_priv: the bat priv with all the soft interface information | |
3447 | * @src: mac address of tt tvlv sender | |
3448 | * @dst: mac address of tt tvlv recipient | |
3449 | * @tvlv_value: tvlv buffer containing the tt data | |
3450 | * @tvlv_value_len: tvlv buffer length | |
3451 | * | |
3452 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3453 | * otherwise. | |
3454 | */ | |
3455 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3456 | uint8_t *src, uint8_t *dst, | |
3457 | void *tvlv_value, | |
3458 | uint16_t tvlv_value_len) | |
3459 | { | |
3460 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3461 | struct batadv_orig_node *orig_node = NULL; | |
3462 | ||
3463 | /* If this node is not the intended recipient of the | |
3464 | * roaming advertisement the packet is forwarded | |
3465 | * (the tvlv API will re-route the packet). | |
3466 | */ | |
3467 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3468 | return NET_RX_DROP; | |
3469 | ||
122edaa0 ML |
3470 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3471 | goto out; | |
3472 | ||
3473 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3474 | if (!orig_node) | |
3475 | goto out; | |
3476 | ||
3477 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3478 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3479 | ||
3480 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3481 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3482 | src, roaming_adv->client); | |
3483 | ||
3484 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3485 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3486 | atomic_read(&orig_node->last_ttvn) + 1); |
3487 | ||
3488 | out: | |
3489 | if (orig_node) | |
3490 | batadv_orig_node_free_ref(orig_node); | |
3491 | return NET_RX_SUCCESS; | |
3492 | } | |
3493 | ||
e1bf0c14 ML |
3494 | /** |
3495 | * batadv_tt_init - initialise the translation table internals | |
3496 | * @bat_priv: the bat priv with all the soft interface information | |
3497 | * | |
3498 | * Return 0 on success or negative error number in case of failure. | |
3499 | */ | |
3500 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3501 | { | |
3502 | int ret; | |
3503 | ||
3504 | ret = batadv_tt_local_init(bat_priv); | |
3505 | if (ret < 0) | |
3506 | return ret; | |
3507 | ||
3508 | ret = batadv_tt_global_init(bat_priv); | |
3509 | if (ret < 0) | |
3510 | return ret; | |
3511 | ||
3512 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3513 | batadv_tt_tvlv_unicast_handler_v1, |
3514 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3515 | |
122edaa0 ML |
3516 | batadv_tvlv_handler_register(bat_priv, NULL, |
3517 | batadv_roam_tvlv_unicast_handler_v1, | |
3518 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3519 | ||
e1bf0c14 ML |
3520 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3521 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3522 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3523 | ||
3524 | return 1; | |
3525 | } |