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e19f9759 | 1 | /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
c6c8fea2 SE |
16 | */ |
17 | ||
18 | #include "main.h" | |
19 | #include "translation-table.h" | |
20 | #include "soft-interface.h" | |
32ae9b22 | 21 | #include "hard-interface.h" |
a73105b8 | 22 | #include "send.h" |
c6c8fea2 SE |
23 | #include "hash.h" |
24 | #include "originator.h" | |
a73105b8 | 25 | #include "routing.h" |
20ff9d59 | 26 | #include "bridge_loop_avoidance.h" |
c5caf4ef | 27 | #include "multicast.h" |
c6c8fea2 | 28 | |
ced72933 | 29 | #include <linux/crc32c.h> |
a73105b8 | 30 | |
dec05074 AQ |
31 | /* hash class keys */ |
32 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
33 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
34 | ||
56303d34 | 35 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 36 | unsigned short vid, |
56303d34 | 37 | struct batadv_orig_node *orig_node); |
a513088d SE |
38 | static void batadv_tt_purge(struct work_struct *work); |
39 | static void | |
56303d34 | 40 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
41 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
42 | struct batadv_orig_node *orig_node, | |
43 | const unsigned char *addr, | |
c018ad3d AQ |
44 | unsigned short vid, const char *message, |
45 | bool roaming); | |
c6c8fea2 | 46 | |
7aadf889 | 47 | /* returns 1 if they are the same mac addr */ |
a513088d | 48 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 49 | { |
56303d34 | 50 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 51 | hash_entry); |
7aadf889 | 52 | |
323813ed | 53 | return batadv_compare_eth(data1, data2); |
7aadf889 ML |
54 | } |
55 | ||
c018ad3d AQ |
56 | /** |
57 | * batadv_choose_tt - return the index of the tt entry in the hash table | |
58 | * @data: pointer to the tt_common_entry object to map | |
59 | * @size: the size of the hash table | |
60 | * | |
61 | * Returns the hash index where the object represented by 'data' should be | |
62 | * stored at. | |
63 | */ | |
64 | static inline uint32_t batadv_choose_tt(const void *data, uint32_t size) | |
65 | { | |
66 | struct batadv_tt_common_entry *tt; | |
67 | uint32_t hash = 0; | |
68 | ||
69 | tt = (struct batadv_tt_common_entry *)data; | |
70 | hash = batadv_hash_bytes(hash, &tt->addr, ETH_ALEN); | |
71 | hash = batadv_hash_bytes(hash, &tt->vid, sizeof(tt->vid)); | |
72 | ||
73 | hash += (hash << 3); | |
74 | hash ^= (hash >> 11); | |
75 | hash += (hash << 15); | |
76 | ||
77 | return hash % size; | |
78 | } | |
79 | ||
80 | /** | |
81 | * batadv_tt_hash_find - look for a client in the given hash table | |
82 | * @hash: the hash table to search | |
83 | * @addr: the mac address of the client to look for | |
84 | * @vid: VLAN identifier | |
85 | * | |
86 | * Returns a pointer to the tt_common struct belonging to the searched client if | |
87 | * found, NULL otherwise. | |
88 | */ | |
56303d34 | 89 | static struct batadv_tt_common_entry * |
c018ad3d AQ |
90 | batadv_tt_hash_find(struct batadv_hashtable *hash, const uint8_t *addr, |
91 | unsigned short vid) | |
7aadf889 | 92 | { |
7aadf889 | 93 | struct hlist_head *head; |
c018ad3d | 94 | struct batadv_tt_common_entry to_search, *tt, *tt_tmp = NULL; |
c90681b8 | 95 | uint32_t index; |
7aadf889 ML |
96 | |
97 | if (!hash) | |
98 | return NULL; | |
99 | ||
8fdd0153 | 100 | ether_addr_copy(to_search.addr, addr); |
c018ad3d AQ |
101 | to_search.vid = vid; |
102 | ||
103 | index = batadv_choose_tt(&to_search, hash->size); | |
7aadf889 ML |
104 | head = &hash->table[index]; |
105 | ||
106 | rcu_read_lock(); | |
c018ad3d AQ |
107 | hlist_for_each_entry_rcu(tt, head, hash_entry) { |
108 | if (!batadv_compare_eth(tt, addr)) | |
109 | continue; | |
110 | ||
111 | if (tt->vid != vid) | |
7aadf889 ML |
112 | continue; |
113 | ||
c018ad3d | 114 | if (!atomic_inc_not_zero(&tt->refcount)) |
7683fdc1 AQ |
115 | continue; |
116 | ||
c018ad3d | 117 | tt_tmp = tt; |
7aadf889 ML |
118 | break; |
119 | } | |
120 | rcu_read_unlock(); | |
121 | ||
c018ad3d | 122 | return tt_tmp; |
7aadf889 ML |
123 | } |
124 | ||
c018ad3d AQ |
125 | /** |
126 | * batadv_tt_local_hash_find - search the local table for a given client | |
127 | * @bat_priv: the bat priv with all the soft interface information | |
128 | * @addr: the mac address of the client to look for | |
129 | * @vid: VLAN identifier | |
130 | * | |
131 | * Returns a pointer to the corresponding tt_local_entry struct if the client is | |
132 | * found, NULL otherwise. | |
133 | */ | |
56303d34 | 134 | static struct batadv_tt_local_entry * |
c018ad3d AQ |
135 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
136 | unsigned short vid) | |
7aadf889 | 137 | { |
56303d34 SE |
138 | struct batadv_tt_common_entry *tt_common_entry; |
139 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 140 | |
c018ad3d AQ |
141 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, addr, |
142 | vid); | |
48100bac AQ |
143 | if (tt_common_entry) |
144 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
145 | struct batadv_tt_local_entry, |
146 | common); | |
48100bac AQ |
147 | return tt_local_entry; |
148 | } | |
7aadf889 | 149 | |
c018ad3d AQ |
150 | /** |
151 | * batadv_tt_global_hash_find - search the global table for a given client | |
152 | * @bat_priv: the bat priv with all the soft interface information | |
153 | * @addr: the mac address of the client to look for | |
154 | * @vid: VLAN identifier | |
155 | * | |
156 | * Returns a pointer to the corresponding tt_global_entry struct if the client | |
157 | * is found, NULL otherwise. | |
158 | */ | |
56303d34 | 159 | static struct batadv_tt_global_entry * |
c018ad3d AQ |
160 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const uint8_t *addr, |
161 | unsigned short vid) | |
48100bac | 162 | { |
56303d34 SE |
163 | struct batadv_tt_common_entry *tt_common_entry; |
164 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 165 | |
c018ad3d AQ |
166 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, addr, |
167 | vid); | |
48100bac AQ |
168 | if (tt_common_entry) |
169 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
170 | struct batadv_tt_global_entry, |
171 | common); | |
48100bac | 172 | return tt_global_entry; |
7aadf889 ML |
173 | } |
174 | ||
a513088d | 175 | static void |
56303d34 | 176 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 177 | { |
48100bac AQ |
178 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
179 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
180 | } |
181 | ||
21026059 AQ |
182 | /** |
183 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
184 | * tt_global_entry and possibly free it | |
185 | * @tt_global_entry: the object to free | |
186 | */ | |
a513088d | 187 | static void |
56303d34 | 188 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 189 | { |
db08e6e5 | 190 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 191 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 192 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
193 | } |
194 | } | |
195 | ||
a513088d | 196 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 197 | { |
56303d34 | 198 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 199 | |
56303d34 | 200 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
201 | |
202 | /* We are in an rcu callback here, therefore we cannot use | |
203 | * batadv_orig_node_free_ref() and its call_rcu(): | |
204 | * An rcu_barrier() wouldn't wait for that to finish | |
205 | */ | |
206 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
207 | kfree(orig_entry); |
208 | } | |
209 | ||
7ea7b4a1 AQ |
210 | /** |
211 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
212 | * by vid | |
213 | * @bat_priv: the bat priv with all the soft interface information | |
214 | * @vid: the VLAN identifier of the sub-table to change | |
215 | * @v: the amount to sum to the local table size | |
216 | */ | |
217 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
218 | unsigned short vid, int v) | |
219 | { | |
220 | struct batadv_softif_vlan *vlan; | |
221 | ||
222 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
223 | if (!vlan) | |
224 | return; | |
225 | ||
226 | atomic_add(v, &vlan->tt.num_entries); | |
227 | ||
228 | batadv_softif_vlan_free_ref(vlan); | |
229 | } | |
230 | ||
231 | /** | |
232 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
233 | * vid | |
234 | * @bat_priv: the bat priv with all the soft interface information | |
235 | * @vid: the VLAN identifier | |
236 | */ | |
237 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
238 | unsigned short vid) | |
239 | { | |
240 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
241 | } | |
242 | ||
243 | /** | |
244 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
245 | * vid | |
246 | * @bat_priv: the bat priv with all the soft interface information | |
247 | * @vid: the VLAN identifier | |
248 | */ | |
249 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
250 | unsigned short vid) | |
251 | { | |
252 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
253 | } | |
254 | ||
255 | /** | |
256 | * batadv_tt_global_size_mod - change the size by v of the local table | |
257 | * identified by vid | |
258 | * @bat_priv: the bat priv with all the soft interface information | |
259 | * @vid: the VLAN identifier | |
260 | * @v: the amount to sum to the global table size | |
261 | */ | |
262 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
263 | unsigned short vid, int v) | |
264 | { | |
265 | struct batadv_orig_node_vlan *vlan; | |
266 | ||
267 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
268 | if (!vlan) | |
269 | return; | |
270 | ||
271 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
272 | spin_lock_bh(&orig_node->vlan_list_lock); | |
273 | list_del_rcu(&vlan->list); | |
274 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
275 | batadv_orig_node_vlan_free_ref(vlan); | |
276 | } | |
277 | ||
278 | batadv_orig_node_vlan_free_ref(vlan); | |
279 | } | |
280 | ||
281 | /** | |
282 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
283 | * given vid | |
284 | * @orig_node: the originator which global table size has to be decreased | |
285 | * @vid: the vlan identifier | |
286 | */ | |
287 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
288 | unsigned short vid) | |
289 | { | |
290 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
291 | } | |
292 | ||
293 | /** | |
294 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
295 | * given vid | |
296 | * @orig_node: the originator which global table size has to be decreased | |
297 | * @vid: the vlan identifier | |
298 | */ | |
299 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
300 | unsigned short vid) | |
301 | { | |
302 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
303 | } | |
304 | ||
a513088d | 305 | static void |
56303d34 | 306 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 307 | { |
d657e621 AQ |
308 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
309 | return; | |
7ea7b4a1 | 310 | |
a513088d | 311 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
312 | } |
313 | ||
3abe4adb AQ |
314 | /** |
315 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
316 | * @bat_priv: the bat priv with all the soft interface information | |
317 | * @tt_local_entry: the TT entry involved in the event | |
318 | * @event_flags: flags to store in the event structure | |
319 | */ | |
56303d34 | 320 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
321 | struct batadv_tt_local_entry *tt_local_entry, |
322 | uint8_t event_flags) | |
a73105b8 | 323 | { |
56303d34 | 324 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
325 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
326 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
327 | bool event_removed = false; |
328 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
329 | |
330 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
331 | if (!tt_change_node) |
332 | return; | |
333 | ||
ff66c975 | 334 | tt_change_node->change.flags = flags; |
ca663046 AQ |
335 | memset(tt_change_node->change.reserved, 0, |
336 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 337 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
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; | |
3c4f7ab6 AQ |
361 | |
362 | /* this is a second add in the same originator interval. It | |
363 | * means that flags have been changed: update them! | |
364 | */ | |
365 | if (!del_op_requested && !del_op_entry) | |
366 | entry->change.flags = flags; | |
367 | ||
3b643de5 AQ |
368 | continue; |
369 | del: | |
370 | list_del(&entry->list); | |
371 | kfree(entry); | |
155e4e12 | 372 | kfree(tt_change_node); |
3b643de5 AQ |
373 | event_removed = true; |
374 | goto unlock; | |
375 | } | |
376 | ||
a73105b8 | 377 | /* track the change in the OGMinterval list */ |
807736f6 | 378 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
379 | |
380 | unlock: | |
807736f6 | 381 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 382 | |
3b643de5 | 383 | if (event_removed) |
807736f6 | 384 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 385 | else |
807736f6 | 386 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
387 | } |
388 | ||
335fbe0f ML |
389 | /** |
390 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
391 | * @changes_num: number of tt changes | |
392 | * | |
393 | * Returns computed length in bytes. | |
394 | */ | |
395 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 396 | { |
335fbe0f | 397 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
398 | } |
399 | ||
298e6e68 AQ |
400 | /** |
401 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
402 | * @tt_len: available space | |
403 | * | |
404 | * Returns the number of entries. | |
405 | */ | |
406 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
407 | { | |
408 | return tt_len / batadv_tt_len(1); | |
409 | } | |
410 | ||
a19d3d85 ML |
411 | /** |
412 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
413 | * size when transmitted over the air | |
414 | * @bat_priv: the bat priv with all the soft interface information | |
415 | * | |
416 | * Returns local translation table size in bytes. | |
417 | */ | |
418 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
419 | { | |
420 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
421 | struct batadv_softif_vlan *vlan; | |
422 | int hdr_size; | |
423 | ||
424 | rcu_read_lock(); | |
425 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
426 | num_vlan++; | |
427 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
428 | } | |
429 | rcu_read_unlock(); | |
430 | ||
431 | /* header size of tvlv encapsulated tt response payload */ | |
432 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
433 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
434 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
435 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
436 | ||
437 | return hdr_size + batadv_tt_len(tt_local_entries); | |
438 | } | |
439 | ||
56303d34 | 440 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 441 | { |
807736f6 | 442 | if (bat_priv->tt.local_hash) |
5346c35e | 443 | return 0; |
c6c8fea2 | 444 | |
807736f6 | 445 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 446 | |
807736f6 | 447 | if (!bat_priv->tt.local_hash) |
5346c35e | 448 | return -ENOMEM; |
c6c8fea2 | 449 | |
dec05074 AQ |
450 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
451 | &batadv_tt_local_hash_lock_class_key); | |
452 | ||
5346c35e | 453 | return 0; |
c6c8fea2 SE |
454 | } |
455 | ||
068ee6e2 AQ |
456 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
457 | struct batadv_tt_global_entry *tt_global, | |
458 | const char *message) | |
459 | { | |
460 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
461 | "Deleting global tt entry %pM (vid: %d): %s\n", |
462 | tt_global->common.addr, | |
463 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
464 | |
465 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 466 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 467 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
468 | } |
469 | ||
c018ad3d AQ |
470 | /** |
471 | * batadv_tt_local_add - add a new client to the local table or update an | |
472 | * existing client | |
473 | * @soft_iface: netdev struct of the mesh interface | |
474 | * @addr: the mac address of the client to add | |
475 | * @vid: VLAN identifier | |
476 | * @ifindex: index of the interface where the client is connected to (useful to | |
477 | * identify wireless clients) | |
9464d071 AQ |
478 | * @mark: the value contained in the skb->mark field of the received packet (if |
479 | * any) | |
a19d3d85 ML |
480 | * |
481 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 482 | */ |
a19d3d85 | 483 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
9464d071 | 484 | unsigned short vid, int ifindex, uint32_t mark) |
c6c8fea2 | 485 | { |
56303d34 | 486 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 487 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 488 | struct batadv_tt_global_entry *tt_global = NULL; |
0c69aecc | 489 | struct net_device *in_dev = NULL; |
db08e6e5 | 490 | struct hlist_head *head; |
56303d34 | 491 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
492 | int hash_added, table_size, packet_size_max; |
493 | bool ret = false, roamed_back = false; | |
3c4f7ab6 | 494 | uint8_t remote_flags; |
9464d071 | 495 | uint32_t match_mark; |
c6c8fea2 | 496 | |
0c69aecc AQ |
497 | if (ifindex != BATADV_NULL_IFINDEX) |
498 | in_dev = dev_get_by_index(&init_net, ifindex); | |
499 | ||
c018ad3d | 500 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
501 | |
502 | if (!is_multicast_ether_addr(addr)) | |
503 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 504 | |
47c94655 AQ |
505 | if (tt_local) { |
506 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
507 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
508 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
509 | "Re-adding pending client %pM (vid: %d)\n", |
510 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
511 | /* whatever the reason why the PENDING flag was set, |
512 | * this is a client which was enqueued to be removed in | |
513 | * this orig_interval. Since it popped up again, the | |
514 | * flag can be reset like it was never enqueued | |
515 | */ | |
516 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
517 | goto add_event; | |
518 | } | |
519 | ||
520 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
521 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
522 | "Roaming client %pM (vid: %d) came back to its original location\n", |
523 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
524 | /* the ROAM flag is set because this client roamed away |
525 | * and the node got a roaming_advertisement message. Now | |
526 | * that the client popped up again at its original | |
527 | * location such flag can be unset | |
528 | */ | |
529 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
530 | roamed_back = true; | |
531 | } | |
532 | goto check_roaming; | |
c6c8fea2 SE |
533 | } |
534 | ||
a19d3d85 ML |
535 | /* Ignore the client if we cannot send it in a full table response. */ |
536 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
537 | table_size += batadv_tt_len(1); | |
538 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
539 | if (table_size > packet_size_max) { | |
540 | net_ratelimited_function(batadv_info, soft_iface, | |
541 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
542 | table_size, packet_size_max, addr); | |
543 | goto out; | |
544 | } | |
545 | ||
47c94655 AQ |
546 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
547 | if (!tt_local) | |
7683fdc1 | 548 | goto out; |
a73105b8 | 549 | |
39c75a51 | 550 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
551 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
552 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 553 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 554 | |
8fdd0153 | 555 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
556 | /* The local entry has to be marked as NEW to avoid to send it in |
557 | * a full table response going out before the next ttvn increment | |
558 | * (consistency check) | |
559 | */ | |
560 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 561 | tt_local->common.vid = vid; |
0c69aecc | 562 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
563 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
564 | atomic_set(&tt_local->common.refcount, 2); | |
565 | tt_local->last_seen = jiffies; | |
566 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 567 | |
c5caf4ef LL |
568 | /* the batman interface mac and multicast addresses should never be |
569 | * purged | |
570 | */ | |
571 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
572 | is_multicast_ether_addr(addr)) | |
47c94655 | 573 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 574 | |
807736f6 | 575 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 576 | batadv_choose_tt, &tt_local->common, |
47c94655 | 577 | &tt_local->common.hash_entry); |
80b3f58c SW |
578 | |
579 | if (unlikely(hash_added != 0)) { | |
580 | /* remove the reference for the hash */ | |
47c94655 | 581 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
582 | goto out; |
583 | } | |
584 | ||
068ee6e2 | 585 | add_event: |
3abe4adb | 586 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 587 | |
068ee6e2 AQ |
588 | check_roaming: |
589 | /* Check whether it is a roaming, but don't do anything if the roaming | |
590 | * process has already been handled | |
591 | */ | |
592 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 593 | /* These node are probably going to update their tt table */ |
47c94655 | 594 | head = &tt_global->orig_list; |
db08e6e5 | 595 | rcu_read_lock(); |
b67bfe0d | 596 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 597 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 598 | tt_global->common.vid, |
a513088d | 599 | orig_entry->orig_node); |
db08e6e5 SW |
600 | } |
601 | rcu_read_unlock(); | |
068ee6e2 AQ |
602 | if (roamed_back) { |
603 | batadv_tt_global_free(bat_priv, tt_global, | |
604 | "Roaming canceled"); | |
605 | tt_global = NULL; | |
606 | } else { | |
607 | /* The global entry has to be marked as ROAMING and | |
608 | * has to be kept for consistency purpose | |
609 | */ | |
610 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
611 | tt_global->roam_at = jiffies; | |
612 | } | |
7683fdc1 | 613 | } |
068ee6e2 | 614 | |
3c4f7ab6 AQ |
615 | /* store the current remote flags before altering them. This helps |
616 | * understanding is flags are changing or not | |
617 | */ | |
618 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
619 | ||
620 | if (batadv_is_wifi_netdev(in_dev)) | |
621 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
622 | else | |
623 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 624 | |
9464d071 AQ |
625 | /* check the mark in the skb: if it's equal to the configured |
626 | * isolation_mark, it means the packet is coming from an isolated | |
627 | * non-mesh client | |
628 | */ | |
629 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
630 | if (bat_priv->isolation_mark_mask && | |
631 | match_mark == bat_priv->isolation_mark) | |
632 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
633 | else | |
634 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
635 | ||
3c4f7ab6 AQ |
636 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
637 | * entry so that all the nodes can get the new flags | |
638 | */ | |
639 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
640 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
641 | ||
642 | ret = true; | |
7683fdc1 | 643 | out: |
0c69aecc AQ |
644 | if (in_dev) |
645 | dev_put(in_dev); | |
47c94655 AQ |
646 | if (tt_local) |
647 | batadv_tt_local_entry_free_ref(tt_local); | |
648 | if (tt_global) | |
649 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 650 | return ret; |
c6c8fea2 SE |
651 | } |
652 | ||
7ea7b4a1 AQ |
653 | /** |
654 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
655 | * within a TT Response directed to another node | |
656 | * @orig_node: originator for which the TT data has to be prepared | |
657 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
658 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
659 | * changed can be stored | |
660 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
661 | * function reserves the amount of space needed to send the entire global TT | |
662 | * table. In case of success the value is updated with the real amount of | |
663 | * reserved bytes | |
664 | ||
665 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
666 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
667 | * objects, one per active VLAN served by the originator node. | |
668 | * | |
669 | * Return the size of the allocated buffer or 0 in case of failure. | |
670 | */ | |
671 | static uint16_t | |
672 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
673 | struct batadv_tvlv_tt_data **tt_data, | |
674 | struct batadv_tvlv_tt_change **tt_change, | |
675 | int32_t *tt_len) | |
676 | { | |
677 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
678 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
679 | struct batadv_orig_node_vlan *vlan; | |
680 | uint8_t *tt_change_ptr; | |
681 | ||
682 | rcu_read_lock(); | |
683 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
684 | num_vlan++; | |
685 | num_entries += atomic_read(&vlan->tt.num_entries); | |
686 | } | |
687 | ||
688 | change_offset = sizeof(**tt_data); | |
689 | change_offset += num_vlan * sizeof(*tt_vlan); | |
690 | ||
691 | /* if tt_len is negative, allocate the space needed by the full table */ | |
692 | if (*tt_len < 0) | |
693 | *tt_len = batadv_tt_len(num_entries); | |
694 | ||
695 | tvlv_len = *tt_len; | |
696 | tvlv_len += change_offset; | |
697 | ||
698 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
699 | if (!*tt_data) { | |
700 | *tt_len = 0; | |
701 | goto out; | |
702 | } | |
703 | ||
704 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
705 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
706 | (*tt_data)->num_vlan = htons(num_vlan); | |
707 | ||
708 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
709 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
710 | tt_vlan->vid = htons(vlan->vid); | |
711 | tt_vlan->crc = htonl(vlan->tt.crc); | |
712 | ||
713 | tt_vlan++; | |
714 | } | |
715 | ||
716 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
717 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
718 | ||
719 | out: | |
720 | rcu_read_unlock(); | |
721 | return tvlv_len; | |
722 | } | |
723 | ||
724 | /** | |
725 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
726 | * node | |
727 | * @bat_priv: the bat priv with all the soft interface information | |
728 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
729 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
730 | * changes can be stored | |
731 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
732 | * function reserves the amount of space needed to send the entire local TT | |
733 | * table. In case of success the value is updated with the real amount of | |
734 | * reserved bytes | |
735 | * | |
736 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
737 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
738 | * objects, one per active VLAN. | |
739 | * | |
740 | * Return the size of the allocated buffer or 0 in case of failure. | |
741 | */ | |
742 | static uint16_t | |
743 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
744 | struct batadv_tvlv_tt_data **tt_data, | |
745 | struct batadv_tvlv_tt_change **tt_change, | |
746 | int32_t *tt_len) | |
747 | { | |
748 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
749 | struct batadv_softif_vlan *vlan; | |
750 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
751 | uint8_t *tt_change_ptr; | |
752 | int change_offset; | |
753 | ||
754 | rcu_read_lock(); | |
755 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
756 | num_vlan++; | |
757 | num_entries += atomic_read(&vlan->tt.num_entries); | |
758 | } | |
759 | ||
760 | change_offset = sizeof(**tt_data); | |
761 | change_offset += num_vlan * sizeof(*tt_vlan); | |
762 | ||
763 | /* if tt_len is negative, allocate the space needed by the full table */ | |
764 | if (*tt_len < 0) | |
765 | *tt_len = batadv_tt_len(num_entries); | |
766 | ||
767 | tvlv_len = *tt_len; | |
768 | tvlv_len += change_offset; | |
769 | ||
770 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
771 | if (!*tt_data) { | |
772 | tvlv_len = 0; | |
773 | goto out; | |
774 | } | |
775 | ||
776 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
777 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
778 | (*tt_data)->num_vlan = htons(num_vlan); | |
779 | ||
780 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
781 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
782 | tt_vlan->vid = htons(vlan->vid); | |
783 | tt_vlan->crc = htonl(vlan->tt.crc); | |
784 | ||
785 | tt_vlan++; | |
786 | } | |
787 | ||
788 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
789 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
790 | ||
791 | out: | |
792 | rcu_read_unlock(); | |
793 | return tvlv_len; | |
794 | } | |
795 | ||
e1bf0c14 ML |
796 | /** |
797 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
798 | * after local tt changes have been committed | |
799 | * @bat_priv: the bat priv with all the soft interface information | |
800 | */ | |
801 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 802 | { |
e1bf0c14 ML |
803 | struct batadv_tt_change_node *entry, *safe; |
804 | struct batadv_tvlv_tt_data *tt_data; | |
805 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 806 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 807 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 808 | uint16_t tvlv_len; |
be9aa4c1 | 809 | |
7ea7b4a1 AQ |
810 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
811 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
812 | |
813 | /* if we have too many changes for one packet don't send any | |
814 | * and wait for the tt table request which will be fragmented | |
815 | */ | |
e1bf0c14 ML |
816 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
817 | tt_diff_len = 0; | |
be9aa4c1 | 818 | |
7ea7b4a1 AQ |
819 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
820 | &tt_change, &tt_diff_len); | |
821 | if (!tvlv_len) | |
e1bf0c14 | 822 | return; |
be9aa4c1 | 823 | |
e1bf0c14 | 824 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 825 | |
e1bf0c14 ML |
826 | if (tt_diff_len == 0) |
827 | goto container_register; | |
be9aa4c1 | 828 | |
807736f6 SE |
829 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
830 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 831 | |
807736f6 | 832 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 833 | list) { |
e1bf0c14 ML |
834 | if (tt_diff_entries_count < tt_diff_entries_num) { |
835 | memcpy(tt_change + tt_diff_entries_count, | |
836 | &entry->change, | |
837 | sizeof(struct batadv_tvlv_tt_change)); | |
838 | tt_diff_entries_count++; | |
c6c8fea2 | 839 | } |
a73105b8 AQ |
840 | list_del(&entry->list); |
841 | kfree(entry); | |
c6c8fea2 | 842 | } |
807736f6 | 843 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
844 | |
845 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
846 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
847 | kfree(bat_priv->tt.last_changeset); | |
848 | bat_priv->tt.last_changeset_len = 0; | |
849 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 850 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 851 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 852 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 853 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
854 | * instead of providing the diff |
855 | */ | |
e1bf0c14 | 856 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 857 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
858 | memcpy(bat_priv->tt.last_changeset, |
859 | tt_change, tt_change_len); | |
860 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
861 | } |
862 | } | |
807736f6 | 863 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 864 | |
e1bf0c14 ML |
865 | container_register: |
866 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 867 | tvlv_len); |
e1bf0c14 | 868 | kfree(tt_data); |
c6c8fea2 SE |
869 | } |
870 | ||
08c36d3e | 871 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
872 | { |
873 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 874 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 875 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 876 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 877 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 878 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 879 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 880 | struct hlist_head *head; |
7ea7b4a1 | 881 | unsigned short vid; |
c90681b8 | 882 | uint32_t i; |
85766a82 AQ |
883 | int last_seen_secs; |
884 | int last_seen_msecs; | |
885 | unsigned long last_seen_jiffies; | |
886 | bool no_purge; | |
887 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 888 | |
30da63a6 ML |
889 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
890 | if (!primary_if) | |
32ae9b22 | 891 | goto out; |
c6c8fea2 | 892 | |
86ceb360 | 893 | seq_printf(seq, |
7ea7b4a1 AQ |
894 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
895 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 896 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 897 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 898 | |
c6c8fea2 SE |
899 | for (i = 0; i < hash->size; i++) { |
900 | head = &hash->table[i]; | |
901 | ||
7aadf889 | 902 | rcu_read_lock(); |
b67bfe0d | 903 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 904 | head, hash_entry) { |
85766a82 AQ |
905 | tt_local = container_of(tt_common_entry, |
906 | struct batadv_tt_local_entry, | |
907 | common); | |
7ea7b4a1 | 908 | vid = tt_common_entry->vid; |
85766a82 AQ |
909 | last_seen_jiffies = jiffies - tt_local->last_seen; |
910 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
911 | last_seen_secs = last_seen_msecs / 1000; | |
912 | last_seen_msecs = last_seen_msecs % 1000; | |
913 | ||
914 | no_purge = tt_common_entry->flags & np_flag; | |
915 | ||
7ea7b4a1 AQ |
916 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
917 | if (!vlan) { | |
918 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
919 | BATADV_PRINT_VID(vid)); | |
920 | continue; | |
921 | } | |
922 | ||
923 | seq_printf(seq, | |
dd24ddb2 | 924 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 925 | tt_common_entry->addr, |
16052789 | 926 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 927 | (tt_common_entry->flags & |
acd34afa | 928 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 929 | no_purge ? 'P' : '.', |
7c64fd98 | 930 | (tt_common_entry->flags & |
acd34afa | 931 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 932 | (tt_common_entry->flags & |
acd34afa | 933 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 934 | (tt_common_entry->flags & |
85766a82 | 935 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 AQ |
936 | (tt_common_entry->flags & |
937 | BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), | |
a7966d90 | 938 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
939 | no_purge ? 0 : last_seen_msecs, |
940 | vlan->tt.crc); | |
941 | ||
942 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 943 | } |
7aadf889 | 944 | rcu_read_unlock(); |
c6c8fea2 | 945 | } |
32ae9b22 ML |
946 | out: |
947 | if (primary_if) | |
e5d89254 | 948 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 949 | return 0; |
c6c8fea2 SE |
950 | } |
951 | ||
56303d34 SE |
952 | static void |
953 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
954 | struct batadv_tt_local_entry *tt_local_entry, | |
955 | uint16_t flags, const char *message) | |
c6c8fea2 | 956 | { |
3abe4adb | 957 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 958 | |
015758d0 AQ |
959 | /* The local client has to be marked as "pending to be removed" but has |
960 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
961 | * response issued before the net ttvn increment (consistency check) |
962 | */ | |
acd34afa | 963 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 964 | |
39c75a51 | 965 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
966 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
967 | tt_local_entry->common.addr, | |
968 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
969 | } |
970 | ||
7f91d06c AQ |
971 | /** |
972 | * batadv_tt_local_remove - logically remove an entry from the local table | |
973 | * @bat_priv: the bat priv with all the soft interface information | |
974 | * @addr: the MAC address of the client to remove | |
c018ad3d | 975 | * @vid: VLAN identifier |
7f91d06c AQ |
976 | * @message: message to append to the log on deletion |
977 | * @roaming: true if the deletion is due to a roaming event | |
978 | * | |
979 | * Returns the flags assigned to the local entry before being deleted | |
980 | */ | |
981 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
982 | const uint8_t *addr, unsigned short vid, |
983 | const char *message, bool roaming) | |
c6c8fea2 | 984 | { |
170173bf | 985 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 986 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 987 | |
c018ad3d | 988 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
989 | if (!tt_local_entry) |
990 | goto out; | |
991 | ||
7f91d06c AQ |
992 | curr_flags = tt_local_entry->common.flags; |
993 | ||
acd34afa | 994 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
995 | /* if this global entry addition is due to a roaming, the node has to |
996 | * mark the local entry as "roamed" in order to correctly reroute | |
997 | * packets later | |
998 | */ | |
7c1fd91d | 999 | if (roaming) { |
acd34afa | 1000 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1001 | /* mark the local client as ROAMed */ |
1002 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1003 | } | |
42d0b044 | 1004 | |
068ee6e2 AQ |
1005 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1006 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1007 | message); | |
1008 | goto out; | |
1009 | } | |
1010 | /* if this client has been added right now, it is possible to | |
1011 | * immediately purge it | |
1012 | */ | |
3abe4adb | 1013 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
1014 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
1015 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 1016 | |
7683fdc1 AQ |
1017 | out: |
1018 | if (tt_local_entry) | |
a513088d | 1019 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1020 | |
1021 | return curr_flags; | |
c6c8fea2 SE |
1022 | } |
1023 | ||
a19d3d85 ML |
1024 | /** |
1025 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1026 | * @bat_priv: the bat priv with all the soft interface information | |
1027 | * @head: pointer to the list containing the local tt entries | |
1028 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1029 | * inactive or not | |
1030 | */ | |
56303d34 | 1031 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1032 | struct hlist_head *head, |
1033 | int timeout) | |
c6c8fea2 | 1034 | { |
56303d34 SE |
1035 | struct batadv_tt_local_entry *tt_local_entry; |
1036 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1037 | struct hlist_node *node_tmp; |
acd34afa | 1038 | |
b67bfe0d | 1039 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1040 | hash_entry) { |
1041 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1042 | struct batadv_tt_local_entry, |
1043 | common); | |
acd34afa SE |
1044 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1045 | continue; | |
1046 | ||
1047 | /* entry already marked for deletion */ | |
1048 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1049 | continue; | |
1050 | ||
a19d3d85 | 1051 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1052 | continue; |
1053 | ||
1054 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1055 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1056 | } | |
1057 | } | |
1058 | ||
a19d3d85 ML |
1059 | /** |
1060 | * batadv_tt_local_purge - purge inactive tt local entries | |
1061 | * @bat_priv: the bat priv with all the soft interface information | |
1062 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1063 | * inactive or not | |
1064 | */ | |
1065 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1066 | int timeout) | |
acd34afa | 1067 | { |
807736f6 | 1068 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1069 | struct hlist_head *head; |
7683fdc1 | 1070 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1071 | uint32_t i; |
c6c8fea2 | 1072 | |
c6c8fea2 SE |
1073 | for (i = 0; i < hash->size; i++) { |
1074 | head = &hash->table[i]; | |
7683fdc1 | 1075 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1076 | |
7683fdc1 | 1077 | spin_lock_bh(list_lock); |
a19d3d85 | 1078 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1079 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1080 | } |
c6c8fea2 SE |
1081 | } |
1082 | ||
56303d34 | 1083 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1084 | { |
5bf74e9c | 1085 | struct batadv_hashtable *hash; |
a73105b8 | 1086 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1087 | struct batadv_tt_common_entry *tt_common_entry; |
1088 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1089 | struct hlist_node *node_tmp; |
7683fdc1 | 1090 | struct hlist_head *head; |
c90681b8 | 1091 | uint32_t i; |
a73105b8 | 1092 | |
807736f6 | 1093 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1094 | return; |
1095 | ||
807736f6 | 1096 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1097 | |
1098 | for (i = 0; i < hash->size; i++) { | |
1099 | head = &hash->table[i]; | |
1100 | list_lock = &hash->list_locks[i]; | |
1101 | ||
1102 | spin_lock_bh(list_lock); | |
b67bfe0d | 1103 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1104 | head, hash_entry) { |
b67bfe0d | 1105 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1106 | tt_local = container_of(tt_common_entry, |
1107 | struct batadv_tt_local_entry, | |
1108 | common); | |
1109 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
1110 | } |
1111 | spin_unlock_bh(list_lock); | |
1112 | } | |
1113 | ||
1a8eaf07 | 1114 | batadv_hash_destroy(hash); |
a73105b8 | 1115 | |
807736f6 | 1116 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1117 | } |
1118 | ||
56303d34 | 1119 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1120 | { |
807736f6 | 1121 | if (bat_priv->tt.global_hash) |
5346c35e | 1122 | return 0; |
c6c8fea2 | 1123 | |
807736f6 | 1124 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1125 | |
807736f6 | 1126 | if (!bat_priv->tt.global_hash) |
5346c35e | 1127 | return -ENOMEM; |
c6c8fea2 | 1128 | |
dec05074 AQ |
1129 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1130 | &batadv_tt_global_hash_lock_class_key); | |
1131 | ||
5346c35e | 1132 | return 0; |
c6c8fea2 SE |
1133 | } |
1134 | ||
56303d34 | 1135 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1136 | { |
56303d34 | 1137 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1138 | |
807736f6 | 1139 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1140 | |
807736f6 | 1141 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1142 | list) { |
1143 | list_del(&entry->list); | |
1144 | kfree(entry); | |
1145 | } | |
c6c8fea2 | 1146 | |
807736f6 SE |
1147 | atomic_set(&bat_priv->tt.local_changes, 0); |
1148 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1149 | } |
c6c8fea2 | 1150 | |
d657e621 AQ |
1151 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1152 | * batadv_tt_global_entry list | |
1153 | * | |
1154 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1155 | */ |
d657e621 AQ |
1156 | static struct batadv_tt_orig_list_entry * |
1157 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1158 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1159 | { |
d657e621 | 1160 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1161 | const struct hlist_head *head; |
db08e6e5 SW |
1162 | |
1163 | rcu_read_lock(); | |
1164 | head = &entry->orig_list; | |
b67bfe0d | 1165 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1166 | if (tmp_orig_entry->orig_node != orig_node) |
1167 | continue; | |
1168 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1169 | continue; | |
1170 | ||
1171 | orig_entry = tmp_orig_entry; | |
1172 | break; | |
db08e6e5 SW |
1173 | } |
1174 | rcu_read_unlock(); | |
d657e621 AQ |
1175 | |
1176 | return orig_entry; | |
1177 | } | |
1178 | ||
1179 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1180 | * returns true if found, false otherwise | |
1181 | */ | |
1182 | static bool | |
1183 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1184 | const struct batadv_orig_node *orig_node) | |
1185 | { | |
1186 | struct batadv_tt_orig_list_entry *orig_entry; | |
1187 | bool found = false; | |
1188 | ||
1189 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1190 | if (orig_entry) { | |
1191 | found = true; | |
1192 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1193 | } | |
1194 | ||
db08e6e5 SW |
1195 | return found; |
1196 | } | |
1197 | ||
a513088d | 1198 | static void |
d657e621 | 1199 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1200 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1201 | { |
56303d34 | 1202 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1203 | |
d657e621 | 1204 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1205 | if (orig_entry) { |
1206 | /* refresh the ttvn: the current value could be a bogus one that | |
1207 | * was added during a "temporary client detection" | |
1208 | */ | |
1209 | orig_entry->ttvn = ttvn; | |
d657e621 | 1210 | goto out; |
30cfd02b | 1211 | } |
d657e621 | 1212 | |
db08e6e5 SW |
1213 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1214 | if (!orig_entry) | |
d657e621 | 1215 | goto out; |
db08e6e5 SW |
1216 | |
1217 | INIT_HLIST_NODE(&orig_entry->list); | |
1218 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1219 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1220 | orig_entry->orig_node = orig_node; |
1221 | orig_entry->ttvn = ttvn; | |
d657e621 | 1222 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1223 | |
d657e621 | 1224 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1225 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1226 | &tt_global->orig_list); |
1227 | spin_unlock_bh(&tt_global->list_lock); | |
1228 | out: | |
1229 | if (orig_entry) | |
1230 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1231 | } |
1232 | ||
d4ff40f6 AQ |
1233 | /** |
1234 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1235 | * @bat_priv: the bat priv with all the soft interface information | |
1236 | * @orig_node: the originator announcing the client | |
1237 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1238 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1239 | * @flags: TT flags that have to be set for this non-mesh client |
1240 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1241 | * | |
1242 | * Add a new TT global entry for the given originator. If the entry already | |
1243 | * exists add a new reference to the given originator (a global entry can have | |
1244 | * references to multiple originators) and adjust the flags attribute to reflect | |
1245 | * the function argument. | |
1246 | * If a TT local entry exists for this non-mesh client remove it. | |
1247 | * | |
1248 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1249 | * |
1250 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1251 | */ |
1e5d49fc AQ |
1252 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1253 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1254 | const unsigned char *tt_addr, |
1255 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1256 | uint8_t ttvn) |
a73105b8 | 1257 | { |
170173bf SE |
1258 | struct batadv_tt_global_entry *tt_global_entry; |
1259 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1260 | bool ret = false; |
80b3f58c | 1261 | int hash_added; |
56303d34 | 1262 | struct batadv_tt_common_entry *common; |
7f91d06c | 1263 | uint16_t local_flags; |
c6c8fea2 | 1264 | |
cfd4f757 AQ |
1265 | /* ignore global entries from backbone nodes */ |
1266 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1267 | return true; | |
1268 | ||
c018ad3d AQ |
1269 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1270 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1271 | |
1272 | /* if the node already has a local client for this entry, it has to wait | |
1273 | * for a roaming advertisement instead of manually messing up the global | |
1274 | * table | |
1275 | */ | |
1276 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1277 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1278 | goto out; | |
a73105b8 AQ |
1279 | |
1280 | if (!tt_global_entry) { | |
d4f44692 | 1281 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1282 | if (!tt_global_entry) |
7683fdc1 AQ |
1283 | goto out; |
1284 | ||
c0a55929 | 1285 | common = &tt_global_entry->common; |
8fdd0153 | 1286 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1287 | common->vid = vid; |
db08e6e5 | 1288 | |
d4f44692 | 1289 | common->flags = flags; |
cc47f66e | 1290 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1291 | /* node must store current time in case of roaming. This is |
1292 | * needed to purge this entry out on timeout (if nobody claims | |
1293 | * it) | |
1294 | */ | |
1295 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1296 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1297 | atomic_set(&common->refcount, 2); |
30cfd02b | 1298 | common->added_at = jiffies; |
db08e6e5 SW |
1299 | |
1300 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1301 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 1302 | |
807736f6 | 1303 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1304 | batadv_compare_tt, |
c018ad3d | 1305 | batadv_choose_tt, common, |
a513088d | 1306 | &common->hash_entry); |
80b3f58c SW |
1307 | |
1308 | if (unlikely(hash_added != 0)) { | |
1309 | /* remove the reference for the hash */ | |
a513088d | 1310 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1311 | goto out_remove; |
1312 | } | |
a73105b8 | 1313 | } else { |
068ee6e2 | 1314 | common = &tt_global_entry->common; |
30cfd02b AQ |
1315 | /* If there is already a global entry, we can use this one for |
1316 | * our processing. | |
068ee6e2 AQ |
1317 | * But if we are trying to add a temporary client then here are |
1318 | * two options at this point: | |
1319 | * 1) the global client is not a temporary client: the global | |
1320 | * client has to be left as it is, temporary information | |
1321 | * should never override any already known client state | |
1322 | * 2) the global client is a temporary client: purge the | |
1323 | * originator list and add the new one orig_entry | |
30cfd02b | 1324 | */ |
068ee6e2 AQ |
1325 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1326 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1327 | goto out; | |
1328 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1329 | orig_node)) | |
1330 | goto out_remove; | |
1331 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1332 | goto add_orig_entry; | |
1333 | } | |
30cfd02b AQ |
1334 | |
1335 | /* if the client was temporary added before receiving the first | |
1336 | * OGM announcing it, we have to clear the TEMP flag | |
1337 | */ | |
068ee6e2 | 1338 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1339 | |
e9c00136 AQ |
1340 | /* the change can carry possible "attribute" flags like the |
1341 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1342 | * client entry | |
1343 | */ | |
1344 | tt_global_entry->common.flags |= flags; | |
1345 | ||
acd34afa SE |
1346 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1347 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1348 | * delete + roaming change for this originator. |
1349 | * | |
1350 | * We should first delete the old originator before adding the | |
1351 | * new one. | |
1352 | */ | |
068ee6e2 | 1353 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1354 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1355 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1356 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1357 | } |
1358 | } | |
068ee6e2 | 1359 | add_orig_entry: |
30cfd02b | 1360 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1361 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1362 | |
39c75a51 | 1363 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1364 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1365 | common->addr, BATADV_PRINT_VID(common->vid), | |
1366 | orig_node->orig); | |
1e5d49fc | 1367 | ret = true; |
c6c8fea2 | 1368 | |
80b3f58c | 1369 | out_remove: |
c5caf4ef LL |
1370 | /* Do not remove multicast addresses from the local hash on |
1371 | * global additions | |
1372 | */ | |
1373 | if (is_multicast_ether_addr(tt_addr)) | |
1374 | goto out; | |
7f91d06c | 1375 | |
a73105b8 | 1376 | /* remove address from local hash if present */ |
c018ad3d | 1377 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1378 | "global tt received", |
c1d07431 | 1379 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1380 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1381 | ||
068ee6e2 AQ |
1382 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1383 | /* this is a normal global add. Therefore the client is not in a | |
1384 | * roaming state anymore. | |
1385 | */ | |
1386 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1387 | ||
7683fdc1 AQ |
1388 | out: |
1389 | if (tt_global_entry) | |
a513088d | 1390 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1391 | if (tt_local_entry) |
1392 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1393 | return ret; |
c6c8fea2 SE |
1394 | } |
1395 | ||
1b371d13 SW |
1396 | /** |
1397 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1398 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1399 | * @tt_global_entry: global translation table entry to be analyzed |
1400 | * | |
1401 | * This functon assumes the caller holds rcu_read_lock(). | |
1402 | * Returns best originator list entry or NULL on errors. | |
1403 | */ | |
1404 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1405 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1406 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1407 | { |
4627456a AQ |
1408 | struct batadv_neigh_node *router, *best_router = NULL; |
1409 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1410 | struct hlist_head *head; |
981d8900 | 1411 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1412 | |
1413 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1414 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1415 | router = batadv_orig_router_get(orig_entry->orig_node, |
1416 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1417 | if (!router) |
1418 | continue; | |
1419 | ||
4627456a | 1420 | if (best_router && |
89652331 SW |
1421 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1422 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1423 | batadv_neigh_node_free_ref(router); |
1424 | continue; | |
981d8900 SE |
1425 | } |
1426 | ||
4627456a AQ |
1427 | /* release the refcount for the "old" best */ |
1428 | if (best_router) | |
1429 | batadv_neigh_node_free_ref(best_router); | |
1430 | ||
1431 | best_entry = orig_entry; | |
1432 | best_router = router; | |
981d8900 SE |
1433 | } |
1434 | ||
4627456a AQ |
1435 | if (best_router) |
1436 | batadv_neigh_node_free_ref(best_router); | |
1437 | ||
981d8900 SE |
1438 | return best_entry; |
1439 | } | |
1440 | ||
1b371d13 SW |
1441 | /** |
1442 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1443 | * for this global entry | |
4627456a | 1444 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1445 | * @tt_global_entry: global translation table entry to be printed |
1446 | * @seq: debugfs table seq_file struct | |
1447 | * | |
1448 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1449 | */ |
a513088d | 1450 | static void |
4627456a AQ |
1451 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1452 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1453 | struct seq_file *seq) |
db08e6e5 | 1454 | { |
981d8900 | 1455 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1456 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1457 | struct batadv_orig_node_vlan *vlan; |
1458 | struct hlist_head *head; | |
db08e6e5 | 1459 | uint8_t last_ttvn; |
7ea7b4a1 | 1460 | uint16_t flags; |
db08e6e5 SW |
1461 | |
1462 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1463 | flags = tt_common_entry->flags; |
1464 | ||
4627456a | 1465 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1466 | if (best_entry) { |
7ea7b4a1 AQ |
1467 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1468 | tt_common_entry->vid); | |
1469 | if (!vlan) { | |
1470 | seq_printf(seq, | |
1471 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1472 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1473 | best_entry->orig_node->orig); | |
1474 | goto print_list; | |
1475 | } | |
1476 | ||
981d8900 | 1477 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1478 | seq_printf(seq, |
dd24ddb2 | 1479 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1480 | '*', tt_global_entry->common.addr, |
16052789 | 1481 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1482 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1483 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1484 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1485 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
dd24ddb2 | 1486 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
981d8900 | 1487 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1488 | |
1489 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1490 | } |
db08e6e5 | 1491 | |
7ea7b4a1 | 1492 | print_list: |
db08e6e5 SW |
1493 | head = &tt_global_entry->orig_list; |
1494 | ||
b67bfe0d | 1495 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1496 | if (best_entry == orig_entry) |
1497 | continue; | |
1498 | ||
7ea7b4a1 AQ |
1499 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1500 | tt_common_entry->vid); | |
1501 | if (!vlan) { | |
1502 | seq_printf(seq, | |
1503 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1504 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1505 | orig_entry->orig_node->orig); | |
1506 | continue; | |
1507 | } | |
1508 | ||
db08e6e5 | 1509 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1510 | seq_printf(seq, |
dd24ddb2 | 1511 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1512 | '+', tt_global_entry->common.addr, |
16052789 | 1513 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1514 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1515 | last_ttvn, vlan->tt.crc, |
acd34afa | 1516 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b | 1517 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 | 1518 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
30cfd02b | 1519 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1520 | |
1521 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1522 | } |
1523 | } | |
1524 | ||
08c36d3e | 1525 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1526 | { |
1527 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1528 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1529 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1530 | struct batadv_tt_common_entry *tt_common_entry; |
1531 | struct batadv_tt_global_entry *tt_global; | |
1532 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1533 | struct hlist_head *head; |
c90681b8 | 1534 | uint32_t i; |
c6c8fea2 | 1535 | |
30da63a6 ML |
1536 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1537 | if (!primary_if) | |
32ae9b22 | 1538 | goto out; |
c6c8fea2 | 1539 | |
2dafb49d AQ |
1540 | seq_printf(seq, |
1541 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1542 | net_dev->name); |
16052789 AQ |
1543 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1544 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1545 | "CRC", "Flags"); | |
c6c8fea2 | 1546 | |
c6c8fea2 SE |
1547 | for (i = 0; i < hash->size; i++) { |
1548 | head = &hash->table[i]; | |
1549 | ||
7aadf889 | 1550 | rcu_read_lock(); |
b67bfe0d | 1551 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1552 | head, hash_entry) { |
56303d34 SE |
1553 | tt_global = container_of(tt_common_entry, |
1554 | struct batadv_tt_global_entry, | |
1555 | common); | |
4627456a | 1556 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1557 | } |
7aadf889 | 1558 | rcu_read_unlock(); |
c6c8fea2 | 1559 | } |
32ae9b22 ML |
1560 | out: |
1561 | if (primary_if) | |
e5d89254 | 1562 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1563 | return 0; |
c6c8fea2 SE |
1564 | } |
1565 | ||
db08e6e5 | 1566 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1567 | static void |
56303d34 | 1568 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1569 | { |
db08e6e5 | 1570 | struct hlist_head *head; |
b67bfe0d | 1571 | struct hlist_node *safe; |
56303d34 | 1572 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1573 | |
db08e6e5 SW |
1574 | spin_lock_bh(&tt_global_entry->list_lock); |
1575 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1576 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1577 | hlist_del_rcu(&orig_entry->list); | |
7ea7b4a1 AQ |
1578 | batadv_tt_global_size_dec(orig_entry->orig_node, |
1579 | tt_global_entry->common.vid); | |
a513088d | 1580 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1581 | } |
1582 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1583 | } |
1584 | ||
a513088d | 1585 | static void |
56303d34 SE |
1586 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1587 | struct batadv_tt_global_entry *tt_global_entry, | |
1588 | struct batadv_orig_node *orig_node, | |
a513088d | 1589 | const char *message) |
db08e6e5 SW |
1590 | { |
1591 | struct hlist_head *head; | |
b67bfe0d | 1592 | struct hlist_node *safe; |
56303d34 | 1593 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1594 | unsigned short vid; |
db08e6e5 SW |
1595 | |
1596 | spin_lock_bh(&tt_global_entry->list_lock); | |
1597 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1598 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1599 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1600 | vid = tt_global_entry->common.vid; |
39c75a51 | 1601 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1602 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1603 | orig_node->orig, |
16052789 AQ |
1604 | tt_global_entry->common.addr, |
1605 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1606 | hlist_del_rcu(&orig_entry->list); |
7ea7b4a1 AQ |
1607 | batadv_tt_global_size_dec(orig_node, |
1608 | tt_global_entry->common.vid); | |
a513088d | 1609 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1610 | } |
1611 | } | |
1612 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1613 | } | |
1614 | ||
db08e6e5 | 1615 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1616 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1617 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1618 | */ |
a513088d | 1619 | static void |
56303d34 SE |
1620 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1621 | struct batadv_tt_global_entry *tt_global_entry, | |
1622 | struct batadv_orig_node *orig_node, | |
1623 | const char *message) | |
db08e6e5 SW |
1624 | { |
1625 | bool last_entry = true; | |
1626 | struct hlist_head *head; | |
56303d34 | 1627 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1628 | |
1629 | /* no local entry exists, case 1: | |
1630 | * Check if this is the last one or if other entries exist. | |
1631 | */ | |
1632 | ||
1633 | rcu_read_lock(); | |
1634 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1635 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1636 | if (orig_entry->orig_node != orig_node) { |
1637 | last_entry = false; | |
1638 | break; | |
1639 | } | |
1640 | } | |
1641 | rcu_read_unlock(); | |
1642 | ||
1643 | if (last_entry) { | |
1644 | /* its the last one, mark for roaming. */ | |
acd34afa | 1645 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1646 | tt_global_entry->roam_at = jiffies; |
1647 | } else | |
1648 | /* there is another entry, we can simply delete this | |
1649 | * one and can still use the other one. | |
1650 | */ | |
a513088d SE |
1651 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1652 | orig_node, message); | |
db08e6e5 SW |
1653 | } |
1654 | ||
c018ad3d AQ |
1655 | /** |
1656 | * batadv_tt_global_del - remove a client from the global table | |
1657 | * @bat_priv: the bat priv with all the soft interface information | |
1658 | * @orig_node: an originator serving this client | |
1659 | * @addr: the mac address of the client | |
1660 | * @vid: VLAN identifier | |
1661 | * @message: a message explaining the reason for deleting the client to print | |
1662 | * for debugging purpose | |
1663 | * @roaming: true if the deletion has been triggered by a roaming event | |
1664 | */ | |
56303d34 SE |
1665 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1666 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1667 | const unsigned char *addr, unsigned short vid, |
a513088d | 1668 | const char *message, bool roaming) |
a73105b8 | 1669 | { |
170173bf | 1670 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1671 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1672 | |
c018ad3d | 1673 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1674 | if (!tt_global_entry) |
7683fdc1 | 1675 | goto out; |
a73105b8 | 1676 | |
db08e6e5 | 1677 | if (!roaming) { |
a513088d SE |
1678 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1679 | orig_node, message); | |
db08e6e5 SW |
1680 | |
1681 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1682 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1683 | message); | |
db08e6e5 SW |
1684 | |
1685 | goto out; | |
1686 | } | |
92f90f56 SE |
1687 | |
1688 | /* if we are deleting a global entry due to a roam | |
1689 | * event, there are two possibilities: | |
db08e6e5 SW |
1690 | * 1) the client roamed from node A to node B => if there |
1691 | * is only one originator left for this client, we mark | |
acd34afa | 1692 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1693 | * wait for node B to claim it. In case of timeout |
1694 | * the entry is purged. | |
db08e6e5 SW |
1695 | * |
1696 | * If there are other originators left, we directly delete | |
1697 | * the originator. | |
92f90f56 | 1698 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1699 | * the global entry, since it is useless now. |
1700 | */ | |
a513088d | 1701 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1702 | tt_global_entry->common.addr, |
1703 | vid); | |
a513088d | 1704 | if (local_entry) { |
db08e6e5 | 1705 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1706 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1707 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1708 | } else |
1709 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1710 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1711 | orig_node, message); | |
92f90f56 | 1712 | |
92f90f56 | 1713 | |
cc47f66e | 1714 | out: |
7683fdc1 | 1715 | if (tt_global_entry) |
a513088d SE |
1716 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1717 | if (local_entry) | |
1718 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1719 | } |
1720 | ||
95fb130d AQ |
1721 | /** |
1722 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1723 | * given originator matching the provided vid | |
1724 | * @bat_priv: the bat priv with all the soft interface information | |
1725 | * @orig_node: the originator owning the entries to remove | |
1726 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1727 | * removed | |
1728 | * @message: debug message to print as "reason" | |
1729 | */ | |
56303d34 SE |
1730 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1731 | struct batadv_orig_node *orig_node, | |
95fb130d | 1732 | int32_t match_vid, |
56303d34 | 1733 | const char *message) |
c6c8fea2 | 1734 | { |
56303d34 SE |
1735 | struct batadv_tt_global_entry *tt_global; |
1736 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1737 | uint32_t i; |
807736f6 | 1738 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1739 | struct hlist_node *safe; |
a73105b8 | 1740 | struct hlist_head *head; |
7683fdc1 | 1741 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1742 | unsigned short vid; |
c6c8fea2 | 1743 | |
6e801494 SW |
1744 | if (!hash) |
1745 | return; | |
1746 | ||
a73105b8 AQ |
1747 | for (i = 0; i < hash->size; i++) { |
1748 | head = &hash->table[i]; | |
7683fdc1 | 1749 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1750 | |
7683fdc1 | 1751 | spin_lock_bh(list_lock); |
b67bfe0d | 1752 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1753 | head, hash_entry) { |
95fb130d AQ |
1754 | /* remove only matching entries */ |
1755 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1756 | continue; | |
1757 | ||
56303d34 SE |
1758 | tt_global = container_of(tt_common_entry, |
1759 | struct batadv_tt_global_entry, | |
1760 | common); | |
db08e6e5 | 1761 | |
56303d34 | 1762 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1763 | orig_node, message); |
db08e6e5 | 1764 | |
56303d34 | 1765 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1766 | vid = tt_global->common.vid; |
39c75a51 | 1767 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1768 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1769 | tt_global->common.addr, | |
1770 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1771 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1772 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1773 | } |
a73105b8 | 1774 | } |
7683fdc1 | 1775 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1776 | } |
e17931d1 | 1777 | orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; |
c6c8fea2 SE |
1778 | } |
1779 | ||
30cfd02b AQ |
1780 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1781 | char **msg) | |
cc47f66e | 1782 | { |
30cfd02b AQ |
1783 | bool purge = false; |
1784 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1785 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1786 | |
30cfd02b AQ |
1787 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1788 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1789 | purge = true; | |
1790 | *msg = "Roaming timeout\n"; | |
1791 | } | |
42d0b044 | 1792 | |
30cfd02b AQ |
1793 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1794 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1795 | purge = true; | |
1796 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1797 | } |
30cfd02b AQ |
1798 | |
1799 | return purge; | |
42d0b044 SE |
1800 | } |
1801 | ||
30cfd02b | 1802 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1803 | { |
807736f6 | 1804 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1805 | struct hlist_head *head; |
b67bfe0d | 1806 | struct hlist_node *node_tmp; |
7683fdc1 | 1807 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1808 | uint32_t i; |
30cfd02b AQ |
1809 | char *msg = NULL; |
1810 | struct batadv_tt_common_entry *tt_common; | |
1811 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1812 | |
cc47f66e AQ |
1813 | for (i = 0; i < hash->size; i++) { |
1814 | head = &hash->table[i]; | |
7683fdc1 | 1815 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1816 | |
7683fdc1 | 1817 | spin_lock_bh(list_lock); |
b67bfe0d | 1818 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1819 | hash_entry) { |
1820 | tt_global = container_of(tt_common, | |
1821 | struct batadv_tt_global_entry, | |
1822 | common); | |
1823 | ||
1824 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1825 | continue; | |
1826 | ||
1827 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1828 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1829 | tt_global->common.addr, | |
1830 | BATADV_PRINT_VID(tt_global->common.vid), | |
1831 | msg); | |
30cfd02b | 1832 | |
b67bfe0d | 1833 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1834 | |
1835 | batadv_tt_global_entry_free_ref(tt_global); | |
1836 | } | |
7683fdc1 | 1837 | spin_unlock_bh(list_lock); |
cc47f66e | 1838 | } |
cc47f66e AQ |
1839 | } |
1840 | ||
56303d34 | 1841 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1842 | { |
5bf74e9c | 1843 | struct batadv_hashtable *hash; |
7683fdc1 | 1844 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1845 | struct batadv_tt_common_entry *tt_common_entry; |
1846 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1847 | struct hlist_node *node_tmp; |
7683fdc1 | 1848 | struct hlist_head *head; |
c90681b8 | 1849 | uint32_t i; |
7683fdc1 | 1850 | |
807736f6 | 1851 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1852 | return; |
1853 | ||
807736f6 | 1854 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1855 | |
1856 | for (i = 0; i < hash->size; i++) { | |
1857 | head = &hash->table[i]; | |
1858 | list_lock = &hash->list_locks[i]; | |
1859 | ||
1860 | spin_lock_bh(list_lock); | |
b67bfe0d | 1861 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1862 | head, hash_entry) { |
b67bfe0d | 1863 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1864 | tt_global = container_of(tt_common_entry, |
1865 | struct batadv_tt_global_entry, | |
1866 | common); | |
1867 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1868 | } |
1869 | spin_unlock_bh(list_lock); | |
1870 | } | |
1871 | ||
1a8eaf07 | 1872 | batadv_hash_destroy(hash); |
7683fdc1 | 1873 | |
807736f6 | 1874 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1875 | } |
1876 | ||
56303d34 SE |
1877 | static bool |
1878 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1879 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1880 | { |
1881 | bool ret = false; | |
1882 | ||
acd34afa SE |
1883 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1884 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1885 | ret = true; |
1886 | ||
2d2fcc2a AQ |
1887 | /* check if the two clients are marked as isolated */ |
1888 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1889 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1890 | ret = true; | |
1891 | ||
59b699cd AQ |
1892 | return ret; |
1893 | } | |
1894 | ||
c018ad3d AQ |
1895 | /** |
1896 | * batadv_transtable_search - get the mesh destination for a given client | |
1897 | * @bat_priv: the bat priv with all the soft interface information | |
1898 | * @src: mac address of the source client | |
1899 | * @addr: mac address of the destination client | |
1900 | * @vid: VLAN identifier | |
1901 | * | |
1902 | * Returns a pointer to the originator that was selected as destination in the | |
1903 | * mesh for contacting the client 'addr', NULL otherwise. | |
1904 | * In case of multiple originators serving the same client, the function returns | |
1905 | * the best one (best in terms of metric towards the destination node). | |
1906 | * | |
1907 | * If the two clients are AP isolated the function returns NULL. | |
1908 | */ | |
56303d34 SE |
1909 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1910 | const uint8_t *src, | |
c018ad3d AQ |
1911 | const uint8_t *addr, |
1912 | unsigned short vid) | |
c6c8fea2 | 1913 | { |
56303d34 SE |
1914 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1915 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1916 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1917 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 1918 | |
eceb22ae | 1919 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 1920 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1921 | if (!tt_local_entry || |
1922 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1923 | goto out; |
1924 | } | |
7aadf889 | 1925 | |
c018ad3d | 1926 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1927 | if (!tt_global_entry) |
7b36e8ee | 1928 | goto out; |
7aadf889 | 1929 | |
3d393e47 | 1930 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1931 | * isolation |
1932 | */ | |
a513088d SE |
1933 | if (tt_local_entry && |
1934 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1935 | goto out; |
1936 | ||
db08e6e5 | 1937 | rcu_read_lock(); |
4627456a | 1938 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1939 | /* found anything? */ |
981d8900 SE |
1940 | if (best_entry) |
1941 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1942 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1943 | orig_node = NULL; | |
1944 | rcu_read_unlock(); | |
981d8900 | 1945 | |
7b36e8ee | 1946 | out: |
3d393e47 | 1947 | if (tt_global_entry) |
a513088d | 1948 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1949 | if (tt_local_entry) |
a513088d | 1950 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1951 | |
7b36e8ee | 1952 | return orig_node; |
c6c8fea2 | 1953 | } |
a73105b8 | 1954 | |
ced72933 AQ |
1955 | /** |
1956 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1957 | * to the given orig_node | |
1958 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 1959 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 1960 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
1961 | * |
1962 | * This function computes the checksum for the global table corresponding to a | |
1963 | * specific originator. In particular, the checksum is computed as follows: For | |
1964 | * each client connected to the originator the CRC32C of the MAC address and the | |
1965 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
1966 | * together. | |
1967 | * | |
1968 | * The idea behind is that CRC32C should be used as much as possible in order to | |
1969 | * produce a unique hash of the table, but since the order which is used to feed | |
1970 | * the CRC32C function affects the result and since every node in the network | |
1971 | * probably sorts the clients differently, the hash function cannot be directly | |
1972 | * computed over the entire table. Hence the CRC32C is used only on | |
1973 | * the single client entry, while all the results are then xor'ed together | |
1974 | * because the XOR operation can combine them all while trying to reduce the | |
1975 | * noise as much as possible. | |
1976 | * | |
1977 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
1978 | */ |
1979 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
1980 | struct batadv_orig_node *orig_node, |
1981 | unsigned short vid) | |
a73105b8 | 1982 | { |
807736f6 | 1983 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1984 | struct batadv_tt_common_entry *tt_common; |
1985 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1986 | struct hlist_head *head; |
0ffa9e8d | 1987 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 1988 | uint8_t flags; |
a30e22ca | 1989 | __be16 tmp_vid; |
a73105b8 AQ |
1990 | |
1991 | for (i = 0; i < hash->size; i++) { | |
1992 | head = &hash->table[i]; | |
1993 | ||
1994 | rcu_read_lock(); | |
b67bfe0d | 1995 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1996 | tt_global = container_of(tt_common, |
1997 | struct batadv_tt_global_entry, | |
1998 | common); | |
7ea7b4a1 AQ |
1999 | /* compute the CRC only for entries belonging to the |
2000 | * VLAN identified by the vid passed as parameter | |
2001 | */ | |
2002 | if (tt_common->vid != vid) | |
2003 | continue; | |
2004 | ||
db08e6e5 SW |
2005 | /* Roaming clients are in the global table for |
2006 | * consistency only. They don't have to be | |
2007 | * taken into account while computing the | |
2008 | * global crc | |
2009 | */ | |
acd34afa | 2010 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2011 | continue; |
30cfd02b AQ |
2012 | /* Temporary clients have not been announced yet, so |
2013 | * they have to be skipped while computing the global | |
2014 | * crc | |
2015 | */ | |
2016 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2017 | continue; | |
db08e6e5 SW |
2018 | |
2019 | /* find out if this global entry is announced by this | |
2020 | * originator | |
2021 | */ | |
56303d34 | 2022 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2023 | orig_node)) |
db08e6e5 SW |
2024 | continue; |
2025 | ||
a30e22ca AQ |
2026 | /* use network order to read the VID: this ensures that |
2027 | * every node reads the bytes in the same order. | |
2028 | */ | |
2029 | tmp_vid = htons(tt_common->vid); | |
2030 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2031 | |
2032 | /* compute the CRC on flags that have to be kept in sync | |
2033 | * among nodes | |
2034 | */ | |
2035 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2036 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2037 | ||
0ffa9e8d | 2038 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2039 | } |
2040 | rcu_read_unlock(); | |
2041 | } | |
2042 | ||
ced72933 | 2043 | return crc; |
a73105b8 AQ |
2044 | } |
2045 | ||
ced72933 AQ |
2046 | /** |
2047 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2048 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2049 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2050 | * |
2051 | * For details about the computation, please refer to the documentation for | |
2052 | * batadv_tt_global_crc(). | |
2053 | * | |
2054 | * Returns the checksum of the local table | |
ced72933 | 2055 | */ |
7ea7b4a1 AQ |
2056 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2057 | unsigned short vid) | |
a73105b8 | 2058 | { |
807736f6 | 2059 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2060 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2061 | struct hlist_head *head; |
0ffa9e8d | 2062 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2063 | uint8_t flags; |
a30e22ca | 2064 | __be16 tmp_vid; |
a73105b8 AQ |
2065 | |
2066 | for (i = 0; i < hash->size; i++) { | |
2067 | head = &hash->table[i]; | |
2068 | ||
2069 | rcu_read_lock(); | |
b67bfe0d | 2070 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2071 | /* compute the CRC only for entries belonging to the |
2072 | * VLAN identified by vid | |
2073 | */ | |
2074 | if (tt_common->vid != vid) | |
2075 | continue; | |
2076 | ||
058d0e26 | 2077 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2078 | * account while computing the CRC |
2079 | */ | |
acd34afa | 2080 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2081 | continue; |
ced72933 | 2082 | |
a30e22ca AQ |
2083 | /* use network order to read the VID: this ensures that |
2084 | * every node reads the bytes in the same order. | |
2085 | */ | |
2086 | tmp_vid = htons(tt_common->vid); | |
2087 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2088 | |
2089 | /* compute the CRC on flags that have to be kept in sync | |
2090 | * among nodes | |
2091 | */ | |
2092 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2093 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2094 | ||
0ffa9e8d | 2095 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2096 | } |
a73105b8 AQ |
2097 | rcu_read_unlock(); |
2098 | } | |
2099 | ||
ced72933 | 2100 | return crc; |
a73105b8 AQ |
2101 | } |
2102 | ||
56303d34 | 2103 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2104 | { |
56303d34 | 2105 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2106 | |
807736f6 | 2107 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2108 | |
807736f6 | 2109 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2110 | list_del(&node->list); |
2111 | kfree(node); | |
2112 | } | |
2113 | ||
807736f6 | 2114 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2115 | } |
2116 | ||
56303d34 SE |
2117 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2118 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2119 | const void *tt_buff, |
2120 | uint16_t tt_buff_len) | |
a73105b8 | 2121 | { |
a73105b8 | 2122 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2123 | * last OGM (the OGM could carry no changes) |
2124 | */ | |
a73105b8 AQ |
2125 | spin_lock_bh(&orig_node->tt_buff_lock); |
2126 | if (tt_buff_len > 0) { | |
2127 | kfree(orig_node->tt_buff); | |
2128 | orig_node->tt_buff_len = 0; | |
2129 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2130 | if (orig_node->tt_buff) { | |
2131 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2132 | orig_node->tt_buff_len = tt_buff_len; | |
2133 | } | |
2134 | } | |
2135 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2136 | } | |
2137 | ||
56303d34 | 2138 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2139 | { |
56303d34 | 2140 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2141 | |
807736f6 SE |
2142 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2143 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2144 | if (batadv_has_timed_out(node->issued_at, |
2145 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2146 | list_del(&node->list); |
2147 | kfree(node); | |
2148 | } | |
2149 | } | |
807736f6 | 2150 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2151 | } |
2152 | ||
2153 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2154 | * has already been issued for this orig_node, NULL otherwise |
2155 | */ | |
56303d34 SE |
2156 | static struct batadv_tt_req_node * |
2157 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2158 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2159 | { |
56303d34 | 2160 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2161 | |
807736f6 SE |
2162 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2163 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2164 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2165 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2166 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2167 | goto unlock; |
2168 | } | |
2169 | ||
2170 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2171 | if (!tt_req_node) | |
2172 | goto unlock; | |
2173 | ||
8fdd0153 | 2174 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2175 | tt_req_node->issued_at = jiffies; |
2176 | ||
807736f6 | 2177 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2178 | unlock: |
807736f6 | 2179 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2180 | return tt_req_node; |
2181 | } | |
2182 | ||
335fbe0f ML |
2183 | /** |
2184 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2185 | * @entry_ptr: to be checked local tt entry | |
2186 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2187 | * | |
2188 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2189 | */ | |
2190 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2191 | { |
56303d34 | 2192 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2193 | |
acd34afa | 2194 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2195 | return 0; |
2196 | return 1; | |
2197 | } | |
2198 | ||
a513088d SE |
2199 | static int batadv_tt_global_valid(const void *entry_ptr, |
2200 | const void *data_ptr) | |
a73105b8 | 2201 | { |
56303d34 SE |
2202 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2203 | const struct batadv_tt_global_entry *tt_global_entry; | |
2204 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2205 | |
30cfd02b AQ |
2206 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2207 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2208 | return 0; |
2209 | ||
56303d34 SE |
2210 | tt_global_entry = container_of(tt_common_entry, |
2211 | struct batadv_tt_global_entry, | |
48100bac AQ |
2212 | common); |
2213 | ||
a513088d | 2214 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2215 | } |
2216 | ||
335fbe0f | 2217 | /** |
7ea7b4a1 AQ |
2218 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2219 | * specified tt hash | |
335fbe0f ML |
2220 | * @bat_priv: the bat priv with all the soft interface information |
2221 | * @hash: hash table containing the tt entries | |
2222 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2223 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2224 | * @valid_cb: function to filter tt change entries |
2225 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2226 | */ |
7ea7b4a1 AQ |
2227 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2228 | struct batadv_hashtable *hash, | |
2229 | void *tvlv_buff, uint16_t tt_len, | |
2230 | int (*valid_cb)(const void *, const void *), | |
2231 | void *cb_data) | |
a73105b8 | 2232 | { |
56303d34 | 2233 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2234 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2235 | struct hlist_head *head; |
335fbe0f | 2236 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2237 | uint32_t i; |
a73105b8 | 2238 | |
298e6e68 | 2239 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2240 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2241 | |
2242 | rcu_read_lock(); | |
2243 | for (i = 0; i < hash->size; i++) { | |
2244 | head = &hash->table[i]; | |
2245 | ||
b67bfe0d | 2246 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2247 | head, hash_entry) { |
335fbe0f | 2248 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2249 | break; |
2250 | ||
48100bac | 2251 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2252 | continue; |
2253 | ||
8fdd0153 | 2254 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2255 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2256 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2257 | memset(tt_change->reserved, 0, |
2258 | sizeof(tt_change->reserved)); | |
a73105b8 | 2259 | |
335fbe0f | 2260 | tt_num_entries++; |
a73105b8 AQ |
2261 | tt_change++; |
2262 | } | |
2263 | } | |
2264 | rcu_read_unlock(); | |
7ea7b4a1 | 2265 | } |
a73105b8 | 2266 | |
7ea7b4a1 AQ |
2267 | /** |
2268 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2269 | * @orig_node: originator for which the CRCs have to be checked | |
2270 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2271 | * @num_vlan: number of tvlv VLAN entries | |
2272 | * @create: if true, create VLAN objects if not found | |
2273 | * | |
2274 | * Return true if all the received CRCs match the locally stored ones, false | |
2275 | * otherwise | |
2276 | */ | |
2277 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2278 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2279 | uint16_t num_vlan) | |
2280 | { | |
2281 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2282 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2283 | uint32_t crc; |
7ea7b4a1 AQ |
2284 | int i; |
2285 | ||
2286 | /* check if each received CRC matches the locally stored one */ | |
2287 | for (i = 0; i < num_vlan; i++) { | |
2288 | tt_vlan_tmp = tt_vlan + i; | |
2289 | ||
2290 | /* if orig_node is a backbone node for this VLAN, don't check | |
2291 | * the CRC as we ignore all the global entries over it | |
2292 | */ | |
2293 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2294 | orig_node->orig, |
2295 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2296 | continue; |
2297 | ||
2298 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2299 | ntohs(tt_vlan_tmp->vid)); | |
2300 | if (!vlan) | |
2301 | return false; | |
2302 | ||
91c2b1a9 AQ |
2303 | crc = vlan->tt.crc; |
2304 | batadv_orig_node_vlan_free_ref(vlan); | |
2305 | ||
2306 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2307 | return false; |
2308 | } | |
2309 | ||
2310 | return true; | |
2311 | } | |
2312 | ||
2313 | /** | |
2314 | * batadv_tt_local_update_crc - update all the local CRCs | |
2315 | * @bat_priv: the bat priv with all the soft interface information | |
2316 | */ | |
2317 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2318 | { | |
2319 | struct batadv_softif_vlan *vlan; | |
2320 | ||
2321 | /* recompute the global CRC for each VLAN */ | |
2322 | rcu_read_lock(); | |
2323 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2324 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2325 | } | |
2326 | rcu_read_unlock(); | |
2327 | } | |
2328 | ||
2329 | /** | |
2330 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2331 | * @bat_priv: the bat priv with all the soft interface information | |
2332 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2333 | */ | |
2334 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2335 | struct batadv_orig_node *orig_node) | |
2336 | { | |
2337 | struct batadv_orig_node_vlan *vlan; | |
2338 | uint32_t crc; | |
2339 | ||
2340 | /* recompute the global CRC for each VLAN */ | |
2341 | rcu_read_lock(); | |
2342 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2343 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2344 | * the CRC as we ignore all the global entries over it | |
2345 | */ | |
cfd4f757 AQ |
2346 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2347 | vlan->vid)) | |
7ea7b4a1 AQ |
2348 | continue; |
2349 | ||
2350 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2351 | vlan->tt.crc = crc; | |
2352 | } | |
2353 | rcu_read_unlock(); | |
a73105b8 AQ |
2354 | } |
2355 | ||
ced72933 AQ |
2356 | /** |
2357 | * batadv_send_tt_request - send a TT Request message to a given node | |
2358 | * @bat_priv: the bat priv with all the soft interface information | |
2359 | * @dst_orig_node: the destination of the message | |
2360 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2361 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2362 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2363 | * @full_table: ask for the entire translation table if true, while only for the |
2364 | * last TT diff otherwise | |
2365 | */ | |
56303d34 SE |
2366 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2367 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2368 | uint8_t ttvn, |
2369 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2370 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2371 | { |
335fbe0f | 2372 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2373 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2374 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2375 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2376 | bool ret = false; |
7ea7b4a1 | 2377 | int i, size; |
a73105b8 | 2378 | |
e5d89254 | 2379 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2380 | if (!primary_if) |
2381 | goto out; | |
2382 | ||
2383 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2384 | * reply from the same orig_node yet |
2385 | */ | |
a513088d | 2386 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2387 | if (!tt_req_node) |
2388 | goto out; | |
2389 | ||
7ea7b4a1 AQ |
2390 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2391 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2392 | if (!tvlv_tt_data) |
a73105b8 AQ |
2393 | goto out; |
2394 | ||
335fbe0f ML |
2395 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2396 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2397 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2398 | ||
2399 | /* send all the CRCs within the request. This is needed by intermediate | |
2400 | * nodes to ensure they have the correct table before replying | |
2401 | */ | |
2402 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2403 | for (i = 0; i < num_vlan; i++) { | |
2404 | tt_vlan_req->vid = tt_vlan->vid; | |
2405 | tt_vlan_req->crc = tt_vlan->crc; | |
2406 | ||
2407 | tt_vlan_req++; | |
2408 | tt_vlan++; | |
2409 | } | |
a73105b8 AQ |
2410 | |
2411 | if (full_table) | |
335fbe0f | 2412 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2413 | |
bb351ba0 | 2414 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2415 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2416 | |
d69909d2 | 2417 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2418 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2419 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2420 | tvlv_tt_data, size); |
335fbe0f | 2421 | ret = true; |
a73105b8 AQ |
2422 | |
2423 | out: | |
a73105b8 | 2424 | if (primary_if) |
e5d89254 | 2425 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2426 | if (ret && tt_req_node) { |
807736f6 | 2427 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2428 | list_del(&tt_req_node->list); |
807736f6 | 2429 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2430 | kfree(tt_req_node); |
2431 | } | |
335fbe0f | 2432 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2433 | return ret; |
2434 | } | |
2435 | ||
335fbe0f ML |
2436 | /** |
2437 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2438 | * node's translation table | |
2439 | * @bat_priv: the bat priv with all the soft interface information | |
2440 | * @tt_data: tt data containing the tt request information | |
2441 | * @req_src: mac address of tt request sender | |
2442 | * @req_dst: mac address of tt request recipient | |
2443 | * | |
2444 | * Returns true if tt request reply was sent, false otherwise. | |
2445 | */ | |
2446 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2447 | struct batadv_tvlv_tt_data *tt_data, | |
2448 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2449 | { |
170173bf | 2450 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2451 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2452 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2453 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2454 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2455 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2456 | uint8_t orig_ttvn, req_ttvn; |
2457 | uint16_t tvlv_len; | |
2458 | int32_t tt_len; | |
a73105b8 | 2459 | |
39c75a51 | 2460 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2461 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2462 | req_src, tt_data->ttvn, req_dst, |
2463 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2464 | |
2465 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2466 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2467 | if (!req_dst_orig_node) |
2468 | goto out; | |
2469 | ||
335fbe0f | 2470 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2471 | if (!res_dst_orig_node) |
2472 | goto out; | |
2473 | ||
a73105b8 | 2474 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2475 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2476 | |
7ea7b4a1 | 2477 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2478 | /* this node doesn't have the requested data */ |
a73105b8 | 2479 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2480 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2481 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2482 | goto out; |
2483 | ||
015758d0 | 2484 | /* If the full table has been explicitly requested */ |
335fbe0f | 2485 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2486 | !req_dst_orig_node->tt_buff) |
2487 | full_table = true; | |
2488 | else | |
2489 | full_table = false; | |
2490 | ||
335fbe0f ML |
2491 | /* TT fragmentation hasn't been implemented yet, so send as many |
2492 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2493 | */ |
a73105b8 AQ |
2494 | if (!full_table) { |
2495 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2496 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2497 | |
7ea7b4a1 AQ |
2498 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2499 | &tvlv_tt_data, | |
2500 | &tt_change, | |
2501 | &tt_len); | |
2502 | if (!tt_len) | |
a73105b8 AQ |
2503 | goto unlock; |
2504 | ||
a73105b8 | 2505 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2506 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2507 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2508 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2509 | } else { | |
7ea7b4a1 AQ |
2510 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2511 | * in the initial part | |
2512 | */ | |
2513 | tt_len = -1; | |
2514 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2515 | &tvlv_tt_data, | |
2516 | &tt_change, | |
2517 | &tt_len); | |
2518 | if (!tt_len) | |
a73105b8 | 2519 | goto out; |
7ea7b4a1 AQ |
2520 | |
2521 | /* fill the rest of the tvlv with the real TT entries */ | |
2522 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2523 | tt_change, tt_len, | |
2524 | batadv_tt_global_valid, | |
2525 | req_dst_orig_node); | |
a73105b8 AQ |
2526 | } |
2527 | ||
a19d3d85 ML |
2528 | /* Don't send the response, if larger than fragmented packet. */ |
2529 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2530 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2531 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2532 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2533 | res_dst_orig_node->orig); | |
2534 | goto out; | |
2535 | } | |
2536 | ||
335fbe0f ML |
2537 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2538 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2539 | |
2540 | if (full_table) | |
335fbe0f | 2541 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2542 | |
39c75a51 | 2543 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2544 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2545 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2546 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2547 | |
d69909d2 | 2548 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2549 | |
335fbe0f | 2550 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2551 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2552 | tvlv_len); | |
e91ecfc6 | 2553 | |
335fbe0f | 2554 | ret = true; |
a73105b8 AQ |
2555 | goto out; |
2556 | ||
2557 | unlock: | |
2558 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2559 | ||
2560 | out: | |
2561 | if (res_dst_orig_node) | |
7d211efc | 2562 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2563 | if (req_dst_orig_node) |
7d211efc | 2564 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2565 | kfree(tvlv_tt_data); |
a73105b8 | 2566 | return ret; |
a73105b8 | 2567 | } |
96412690 | 2568 | |
335fbe0f ML |
2569 | /** |
2570 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2571 | * translation table | |
2572 | * @bat_priv: the bat priv with all the soft interface information | |
2573 | * @tt_data: tt data containing the tt request information | |
2574 | * @req_src: mac address of tt request sender | |
2575 | * | |
2576 | * Returns true if tt request reply was sent, false otherwise. | |
2577 | */ | |
2578 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2579 | struct batadv_tvlv_tt_data *tt_data, | |
2580 | uint8_t *req_src) | |
a73105b8 | 2581 | { |
335fbe0f | 2582 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2583 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2584 | struct batadv_tvlv_tt_change *tt_change; |
2585 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2586 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2587 | uint16_t tvlv_len; |
a73105b8 | 2588 | bool full_table; |
7ea7b4a1 | 2589 | int32_t tt_len; |
a73105b8 | 2590 | |
39c75a51 | 2591 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2592 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2593 | req_src, tt_data->ttvn, |
2594 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2595 | |
a70a9aa9 | 2596 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2597 | |
807736f6 | 2598 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2599 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2600 | |
335fbe0f | 2601 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2602 | if (!orig_node) |
2603 | goto out; | |
2604 | ||
e5d89254 | 2605 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2606 | if (!primary_if) |
2607 | goto out; | |
2608 | ||
2609 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2610 | * is too big send the whole local translation table |
2611 | */ | |
335fbe0f | 2612 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2613 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2614 | full_table = true; |
2615 | else | |
2616 | full_table = false; | |
2617 | ||
335fbe0f ML |
2618 | /* TT fragmentation hasn't been implemented yet, so send as many |
2619 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2620 | */ |
a73105b8 | 2621 | if (!full_table) { |
807736f6 | 2622 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2623 | |
7ea7b4a1 AQ |
2624 | tt_len = bat_priv->tt.last_changeset_len; |
2625 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2626 | &tvlv_tt_data, | |
2627 | &tt_change, | |
2628 | &tt_len); | |
2629 | if (!tt_len) | |
a73105b8 AQ |
2630 | goto unlock; |
2631 | ||
335fbe0f | 2632 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2633 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2634 | bat_priv->tt.last_changeset_len); |
2635 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2636 | } else { |
335fbe0f ML |
2637 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2638 | ||
7ea7b4a1 AQ |
2639 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2640 | * in the initial part | |
2641 | */ | |
2642 | tt_len = -1; | |
2643 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2644 | &tvlv_tt_data, | |
2645 | &tt_change, | |
2646 | &tt_len); | |
2647 | if (!tt_len) | |
a73105b8 | 2648 | goto out; |
7ea7b4a1 AQ |
2649 | |
2650 | /* fill the rest of the tvlv with the real TT entries */ | |
2651 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2652 | tt_change, tt_len, | |
2653 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2654 | } |
2655 | ||
335fbe0f ML |
2656 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2657 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2658 | |
2659 | if (full_table) | |
335fbe0f | 2660 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2661 | |
39c75a51 | 2662 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2663 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2664 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2665 | |
d69909d2 | 2666 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2667 | |
335fbe0f | 2668 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2669 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2670 | tvlv_len); | |
335fbe0f | 2671 | |
a73105b8 AQ |
2672 | goto out; |
2673 | ||
2674 | unlock: | |
807736f6 | 2675 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2676 | out: |
a70a9aa9 | 2677 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2678 | if (orig_node) |
7d211efc | 2679 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2680 | if (primary_if) |
e5d89254 | 2681 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2682 | kfree(tvlv_tt_data); |
2683 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2684 | return true; |
2685 | } | |
2686 | ||
335fbe0f ML |
2687 | /** |
2688 | * batadv_send_tt_response - send reply to tt request | |
2689 | * @bat_priv: the bat priv with all the soft interface information | |
2690 | * @tt_data: tt data containing the tt request information | |
2691 | * @req_src: mac address of tt request sender | |
2692 | * @req_dst: mac address of tt request recipient | |
2693 | * | |
2694 | * Returns true if tt request reply was sent, false otherwise. | |
2695 | */ | |
2696 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2697 | struct batadv_tvlv_tt_data *tt_data, | |
2698 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2699 | { |
cfd4f757 | 2700 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2701 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2702 | else |
335fbe0f ML |
2703 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2704 | req_src, req_dst); | |
a73105b8 AQ |
2705 | } |
2706 | ||
56303d34 SE |
2707 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2708 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2709 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2710 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2711 | { |
2712 | int i; | |
a513088d | 2713 | int roams; |
a73105b8 AQ |
2714 | |
2715 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2716 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2717 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2718 | batadv_tt_global_del(bat_priv, orig_node, |
2719 | (tt_change + i)->addr, | |
c018ad3d | 2720 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2721 | "tt removed by changes", |
2722 | roams); | |
08c36d3e | 2723 | } else { |
08c36d3e | 2724 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2725 | (tt_change + i)->addr, |
c018ad3d | 2726 | ntohs((tt_change + i)->vid), |
d4f44692 | 2727 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2728 | /* In case of problem while storing a |
2729 | * global_entry, we stop the updating | |
2730 | * procedure without committing the | |
2731 | * ttvn change. This will avoid to send | |
2732 | * corrupted data on tt_request | |
2733 | */ | |
2734 | return; | |
08c36d3e | 2735 | } |
a73105b8 | 2736 | } |
e17931d1 | 2737 | orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; |
a73105b8 AQ |
2738 | } |
2739 | ||
56303d34 | 2740 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2741 | struct batadv_tvlv_tt_change *tt_change, |
2742 | uint8_t ttvn, uint8_t *resp_src, | |
2743 | uint16_t num_entries) | |
a73105b8 | 2744 | { |
170173bf | 2745 | struct batadv_orig_node *orig_node; |
a73105b8 | 2746 | |
335fbe0f | 2747 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2748 | if (!orig_node) |
2749 | goto out; | |
2750 | ||
2751 | /* Purge the old table first.. */ | |
95fb130d AQ |
2752 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2753 | "Received full table"); | |
a73105b8 | 2754 | |
7ea7b4a1 AQ |
2755 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2756 | ttvn); | |
a73105b8 AQ |
2757 | |
2758 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2759 | kfree(orig_node->tt_buff); | |
2760 | orig_node->tt_buff_len = 0; | |
2761 | orig_node->tt_buff = NULL; | |
2762 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2763 | ||
7ea7b4a1 | 2764 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2765 | |
2766 | out: | |
2767 | if (orig_node) | |
7d211efc | 2768 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2769 | } |
2770 | ||
56303d34 SE |
2771 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2772 | struct batadv_orig_node *orig_node, | |
a513088d | 2773 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2774 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2775 | { |
a513088d SE |
2776 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2777 | tt_num_changes, ttvn); | |
a73105b8 | 2778 | |
e8cf234a AQ |
2779 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2780 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2781 | atomic_set(&orig_node->last_ttvn, ttvn); |
2782 | } | |
2783 | ||
c018ad3d AQ |
2784 | /** |
2785 | * batadv_is_my_client - check if a client is served by the local node | |
2786 | * @bat_priv: the bat priv with all the soft interface information | |
2787 | * @addr: the mac adress of the client to check | |
2788 | * @vid: VLAN identifier | |
2789 | * | |
2790 | * Returns true if the client is served by this node, false otherwise. | |
2791 | */ | |
2792 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2793 | unsigned short vid) | |
a73105b8 | 2794 | { |
170173bf | 2795 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2796 | bool ret = false; |
a73105b8 | 2797 | |
c018ad3d | 2798 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2799 | if (!tt_local_entry) |
2800 | goto out; | |
058d0e26 | 2801 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2802 | * consistency purpose) |
2803 | */ | |
7c1fd91d AQ |
2804 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2805 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2806 | goto out; |
7683fdc1 AQ |
2807 | ret = true; |
2808 | out: | |
a73105b8 | 2809 | if (tt_local_entry) |
a513088d | 2810 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2811 | return ret; |
a73105b8 AQ |
2812 | } |
2813 | ||
335fbe0f ML |
2814 | /** |
2815 | * batadv_handle_tt_response - process incoming tt reply | |
2816 | * @bat_priv: the bat priv with all the soft interface information | |
2817 | * @tt_data: tt data containing the tt request information | |
2818 | * @resp_src: mac address of tt reply sender | |
2819 | * @num_entries: number of tt change entries appended to the tt data | |
2820 | */ | |
2821 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2822 | struct batadv_tvlv_tt_data *tt_data, | |
2823 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2824 | { |
56303d34 SE |
2825 | struct batadv_tt_req_node *node, *safe; |
2826 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2827 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2828 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2829 | uint16_t change_offset; | |
a73105b8 | 2830 | |
39c75a51 | 2831 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2832 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2833 | resp_src, tt_data->ttvn, num_entries, |
2834 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2835 | |
335fbe0f | 2836 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2837 | if (!orig_node) |
2838 | goto out; | |
2839 | ||
a70a9aa9 AQ |
2840 | spin_lock_bh(&orig_node->tt_lock); |
2841 | ||
7ea7b4a1 AQ |
2842 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2843 | change_offset *= ntohs(tt_data->num_vlan); | |
2844 | change_offset += sizeof(*tt_data); | |
2845 | tvlv_ptr += change_offset; | |
2846 | ||
2847 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2848 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2849 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2850 | resp_src, num_entries); | |
96412690 | 2851 | } else { |
335fbe0f ML |
2852 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2853 | tt_data->ttvn, tt_change); | |
96412690 | 2854 | } |
a73105b8 | 2855 | |
a70a9aa9 | 2856 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2857 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2858 | |
2859 | spin_unlock_bh(&orig_node->tt_lock); | |
2860 | ||
a73105b8 | 2861 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2862 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2863 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2864 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2865 | continue; |
2866 | list_del(&node->list); | |
2867 | kfree(node); | |
2868 | } | |
7ea7b4a1 | 2869 | |
807736f6 | 2870 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2871 | out: |
2872 | if (orig_node) | |
7d211efc | 2873 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2874 | } |
2875 | ||
56303d34 | 2876 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2877 | { |
56303d34 | 2878 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2879 | |
807736f6 | 2880 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2881 | |
807736f6 | 2882 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2883 | list_del(&node->list); |
2884 | kfree(node); | |
2885 | } | |
2886 | ||
807736f6 | 2887 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2888 | } |
2889 | ||
56303d34 | 2890 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2891 | { |
56303d34 | 2892 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2893 | |
807736f6 SE |
2894 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2895 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2896 | if (!batadv_has_timed_out(node->first_time, |
2897 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2898 | continue; |
2899 | ||
2900 | list_del(&node->list); | |
2901 | kfree(node); | |
2902 | } | |
807736f6 | 2903 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2904 | } |
2905 | ||
2906 | /* This function checks whether the client already reached the | |
2907 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2908 | * will not be sent. | |
2909 | * | |
9cfc7bd6 SE |
2910 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2911 | */ | |
56303d34 | 2912 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2913 | uint8_t *client) |
cc47f66e | 2914 | { |
56303d34 | 2915 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2916 | bool ret = false; |
2917 | ||
807736f6 | 2918 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2919 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2920 | * reply from the same orig_node yet |
2921 | */ | |
807736f6 | 2922 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2923 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2924 | continue; |
2925 | ||
1eda58bf | 2926 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2927 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2928 | continue; |
2929 | ||
3e34819e | 2930 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2931 | /* Sorry, you roamed too many times! */ |
2932 | goto unlock; | |
2933 | ret = true; | |
2934 | break; | |
2935 | } | |
2936 | ||
2937 | if (!ret) { | |
2938 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2939 | if (!tt_roam_node) | |
2940 | goto unlock; | |
2941 | ||
2942 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2943 | atomic_set(&tt_roam_node->counter, |
2944 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 2945 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 2946 | |
807736f6 | 2947 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2948 | ret = true; |
2949 | } | |
2950 | ||
2951 | unlock: | |
807736f6 | 2952 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2953 | return ret; |
2954 | } | |
2955 | ||
c018ad3d AQ |
2956 | /** |
2957 | * batadv_send_roam_adv - send a roaming advertisement message | |
2958 | * @bat_priv: the bat priv with all the soft interface information | |
2959 | * @client: mac address of the roaming client | |
2960 | * @vid: VLAN identifier | |
2961 | * @orig_node: message destination | |
2962 | * | |
2963 | * Send a ROAMING_ADV message to the node which was previously serving this | |
2964 | * client. This is done to inform the node that from now on all traffic destined | |
2965 | * for this particular roamed client has to be forwarded to the sender of the | |
2966 | * roaming message. | |
2967 | */ | |
56303d34 | 2968 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 2969 | unsigned short vid, |
56303d34 | 2970 | struct batadv_orig_node *orig_node) |
cc47f66e | 2971 | { |
56303d34 | 2972 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2973 | struct batadv_tvlv_roam_adv tvlv_roam; |
2974 | ||
2975 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2976 | if (!primary_if) | |
2977 | goto out; | |
cc47f66e AQ |
2978 | |
2979 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2980 | * already roamed to us too many times |
2981 | */ | |
a513088d | 2982 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2983 | goto out; |
2984 | ||
39c75a51 | 2985 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
2986 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
2987 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 2988 | |
d69909d2 | 2989 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2990 | |
122edaa0 | 2991 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 2992 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
2993 | |
2994 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2995 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2996 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2997 | |
2998 | out: | |
122edaa0 ML |
2999 | if (primary_if) |
3000 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3001 | } |
3002 | ||
a513088d | 3003 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3004 | { |
56303d34 | 3005 | struct delayed_work *delayed_work; |
807736f6 | 3006 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3007 | struct batadv_priv *bat_priv; |
3008 | ||
3009 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3010 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3011 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3012 | |
a19d3d85 | 3013 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3014 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3015 | batadv_tt_req_purge(bat_priv); |
3016 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3017 | |
72414442 AQ |
3018 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3019 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3020 | } |
cc47f66e | 3021 | |
56303d34 | 3022 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3023 | { |
e1bf0c14 ML |
3024 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3025 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3026 | ||
807736f6 | 3027 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3028 | |
a513088d SE |
3029 | batadv_tt_local_table_free(bat_priv); |
3030 | batadv_tt_global_table_free(bat_priv); | |
3031 | batadv_tt_req_list_free(bat_priv); | |
3032 | batadv_tt_changes_list_free(bat_priv); | |
3033 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3034 | |
807736f6 | 3035 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3036 | } |
058d0e26 | 3037 | |
7ea7b4a1 AQ |
3038 | /** |
3039 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3040 | * table and possibly count them in the TT size | |
3041 | * @bat_priv: the bat priv with all the soft interface information | |
3042 | * @flags: the flag to switch | |
3043 | * @enable: whether to set or unset the flag | |
3044 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3045 | */ |
7ea7b4a1 AQ |
3046 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3047 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3048 | { |
7ea7b4a1 AQ |
3049 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3050 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3051 | uint16_t changed_num = 0; |
058d0e26 | 3052 | struct hlist_head *head; |
7ea7b4a1 | 3053 | uint32_t i; |
058d0e26 AQ |
3054 | |
3055 | if (!hash) | |
7ea7b4a1 | 3056 | return; |
058d0e26 AQ |
3057 | |
3058 | for (i = 0; i < hash->size; i++) { | |
3059 | head = &hash->table[i]; | |
3060 | ||
3061 | rcu_read_lock(); | |
b67bfe0d | 3062 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3063 | head, hash_entry) { |
697f2531 AQ |
3064 | if (enable) { |
3065 | if ((tt_common_entry->flags & flags) == flags) | |
3066 | continue; | |
3067 | tt_common_entry->flags |= flags; | |
3068 | } else { | |
3069 | if (!(tt_common_entry->flags & flags)) | |
3070 | continue; | |
3071 | tt_common_entry->flags &= ~flags; | |
3072 | } | |
3073 | changed_num++; | |
7ea7b4a1 AQ |
3074 | |
3075 | if (!count) | |
3076 | continue; | |
3077 | ||
3078 | batadv_tt_local_size_inc(bat_priv, | |
3079 | tt_common_entry->vid); | |
058d0e26 AQ |
3080 | } |
3081 | rcu_read_unlock(); | |
3082 | } | |
058d0e26 AQ |
3083 | } |
3084 | ||
acd34afa | 3085 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3086 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3087 | { |
807736f6 | 3088 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3089 | struct batadv_tt_common_entry *tt_common; |
3090 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3091 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3092 | struct hlist_head *head; |
3093 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3094 | uint32_t i; |
058d0e26 AQ |
3095 | |
3096 | if (!hash) | |
3097 | return; | |
3098 | ||
3099 | for (i = 0; i < hash->size; i++) { | |
3100 | head = &hash->table[i]; | |
3101 | list_lock = &hash->list_locks[i]; | |
3102 | ||
3103 | spin_lock_bh(list_lock); | |
b67bfe0d | 3104 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3105 | hash_entry) { |
3106 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3107 | continue; |
3108 | ||
39c75a51 | 3109 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3110 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3111 | tt_common->addr, | |
3112 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3113 | |
7ea7b4a1 | 3114 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3115 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3116 | tt_local = container_of(tt_common, |
3117 | struct batadv_tt_local_entry, | |
3118 | common); | |
3119 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
3120 | } |
3121 | spin_unlock_bh(list_lock); | |
3122 | } | |
058d0e26 AQ |
3123 | } |
3124 | ||
e1bf0c14 | 3125 | /** |
a19d3d85 ML |
3126 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3127 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3128 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3129 | * |
3130 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3131 | */ |
a19d3d85 | 3132 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3133 | { |
c5caf4ef LL |
3134 | /* Update multicast addresses in local translation table */ |
3135 | batadv_mcast_mla_update(bat_priv); | |
3136 | ||
e1bf0c14 ML |
3137 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3138 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3139 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3140 | return; |
e1bf0c14 | 3141 | } |
be9aa4c1 | 3142 | |
7ea7b4a1 | 3143 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3144 | |
a513088d | 3145 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3146 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3147 | |
3148 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3149 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3150 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3151 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3152 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3153 | |
3154 | /* reset the sending counter */ | |
807736f6 | 3155 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3156 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3157 | } |
a70a9aa9 | 3158 | |
a19d3d85 ML |
3159 | /** |
3160 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3161 | * have been queued in the time since the last commit | |
3162 | * @bat_priv: the bat priv with all the soft interface information | |
3163 | */ | |
3164 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3165 | { | |
3166 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3167 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3168 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3169 | } |
59b699cd | 3170 | |
56303d34 | 3171 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3172 | uint8_t *dst, unsigned short vid) |
59b699cd | 3173 | { |
56303d34 SE |
3174 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3175 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3176 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3177 | bool ret = false; |
59b699cd | 3178 | |
b8cbd81d AQ |
3179 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3180 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3181 | goto out; |
59b699cd | 3182 | |
b8cbd81d | 3183 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3184 | if (!tt_local_entry) |
3185 | goto out; | |
3186 | ||
b8cbd81d | 3187 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3188 | if (!tt_global_entry) |
3189 | goto out; | |
3190 | ||
1f129fef | 3191 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3192 | goto out; |
3193 | ||
5870adc6 | 3194 | ret = true; |
59b699cd AQ |
3195 | |
3196 | out: | |
b8cbd81d AQ |
3197 | if (vlan) |
3198 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3199 | if (tt_global_entry) |
a513088d | 3200 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3201 | if (tt_local_entry) |
a513088d | 3202 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3203 | return ret; |
3204 | } | |
a943cac1 | 3205 | |
e1bf0c14 ML |
3206 | /** |
3207 | * batadv_tt_update_orig - update global translation table with new tt | |
3208 | * information received via ogms | |
3209 | * @bat_priv: the bat priv with all the soft interface information | |
3210 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3211 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3212 | * @tt_num_vlan: number of tvlv VLAN entries | |
3213 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3214 | * @tt_num_changes: number of tt changes inside the tt buffer |
3215 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3216 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3217 | */ |
3218 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3219 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3220 | const void *tt_buff, uint16_t tt_num_vlan, |
3221 | struct batadv_tvlv_tt_change *tt_change, | |
3222 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3223 | { |
3224 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3225 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3226 | bool full_table = true; |
e17931d1 | 3227 | bool has_tt_init; |
a943cac1 | 3228 | |
7ea7b4a1 | 3229 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
e17931d1 LL |
3230 | has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; |
3231 | ||
17071578 | 3232 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3233 | * increased by one -> we can apply the attached changes |
3234 | */ | |
e17931d1 | 3235 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3236 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3237 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3238 | * times. | |
9cfc7bd6 SE |
3239 | * In this case send a tt request |
3240 | */ | |
a943cac1 ML |
3241 | if (!tt_num_changes) { |
3242 | full_table = false; | |
3243 | goto request_table; | |
3244 | } | |
3245 | ||
a70a9aa9 AQ |
3246 | spin_lock_bh(&orig_node->tt_lock); |
3247 | ||
a513088d | 3248 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3249 | ttvn, tt_change); |
a943cac1 ML |
3250 | |
3251 | /* Even if we received the precomputed crc with the OGM, we | |
3252 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3253 | * in the global table |
3254 | */ | |
7ea7b4a1 | 3255 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3256 | |
a70a9aa9 AQ |
3257 | spin_unlock_bh(&orig_node->tt_lock); |
3258 | ||
a943cac1 ML |
3259 | /* The ttvn alone is not enough to guarantee consistency |
3260 | * because a single value could represent different states | |
3261 | * (due to the wrap around). Thus a node has to check whether | |
3262 | * the resulting table (after applying the changes) is still | |
3263 | * consistent or not. E.g. a node could disconnect while its | |
3264 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3265 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3266 | * inconsistency |
3267 | */ | |
7ea7b4a1 AQ |
3268 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3269 | tt_num_vlan)) | |
a943cac1 | 3270 | goto request_table; |
a943cac1 ML |
3271 | } else { |
3272 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3273 | * in sync anymore -> request fresh tt data |
3274 | */ | |
e17931d1 | 3275 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3276 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3277 | tt_num_vlan)) { | |
a943cac1 | 3278 | request_table: |
39c75a51 | 3279 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3280 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3281 | orig_node->orig, ttvn, orig_ttvn, | |
3282 | tt_num_changes); | |
a513088d | 3283 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3284 | tt_vlan, tt_num_vlan, |
3285 | full_table); | |
a943cac1 ML |
3286 | return; |
3287 | } | |
3288 | } | |
3289 | } | |
3275e7cc | 3290 | |
c018ad3d AQ |
3291 | /** |
3292 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3293 | * @bat_priv: the bat priv with all the soft interface information | |
3294 | * @addr: the mac address of the client to check | |
3295 | * @vid: VLAN identifier | |
3296 | * | |
3297 | * Returns true if we know that the client has moved from its old originator | |
3298 | * to another one. This entry is still kept for consistency purposes and will be | |
3299 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3300 | */ |
56303d34 | 3301 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3302 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3303 | { |
56303d34 | 3304 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3305 | bool ret = false; |
3306 | ||
c018ad3d | 3307 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3308 | if (!tt_global_entry) |
3309 | goto out; | |
3310 | ||
c1d07431 | 3311 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3312 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3313 | out: |
3314 | return ret; | |
3315 | } | |
30cfd02b | 3316 | |
7c1fd91d AQ |
3317 | /** |
3318 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3319 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3320 | * @addr: the mac address of the local client to query |
3321 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3322 | * |
3323 | * Returns true if the local client is known to be roaming (it is not served by | |
3324 | * this node anymore) or not. If yes, the client is still present in the table | |
3325 | * to keep the latter consistent with the node TTVN | |
3326 | */ | |
3327 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3328 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3329 | { |
3330 | struct batadv_tt_local_entry *tt_local_entry; | |
3331 | bool ret = false; | |
3332 | ||
c018ad3d | 3333 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3334 | if (!tt_local_entry) |
3335 | goto out; | |
3336 | ||
3337 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3338 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3339 | out: | |
3340 | return ret; | |
7c1fd91d AQ |
3341 | } |
3342 | ||
30cfd02b AQ |
3343 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3344 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3345 | const unsigned char *addr, |
16052789 | 3346 | unsigned short vid) |
30cfd02b AQ |
3347 | { |
3348 | bool ret = false; | |
3349 | ||
16052789 | 3350 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3351 | BATADV_TT_CLIENT_TEMP, |
3352 | atomic_read(&orig_node->last_ttvn))) | |
3353 | goto out; | |
3354 | ||
3355 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3356 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3357 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3358 | ret = true; |
3359 | out: | |
3360 | return ret; | |
3361 | } | |
e1bf0c14 | 3362 | |
a19d3d85 ML |
3363 | /** |
3364 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3365 | * maximum packet size that can be transported through the mesh | |
3366 | * @soft_iface: netdev struct of the mesh interface | |
3367 | * | |
3368 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3369 | * to be removed. | |
3370 | */ | |
3371 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3372 | { | |
3373 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3374 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3375 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3376 | bool reduced = false; | |
3377 | ||
3378 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3379 | ||
3380 | while (true) { | |
3381 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3382 | if (packet_size_max >= table_size) | |
3383 | break; | |
3384 | ||
3385 | batadv_tt_local_purge(bat_priv, timeout); | |
3386 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3387 | ||
3388 | timeout /= 2; | |
3389 | reduced = true; | |
3390 | net_ratelimited_function(batadv_info, soft_iface, | |
3391 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3392 | packet_size_max); | |
3393 | } | |
3394 | ||
3395 | /* commit these changes immediately, to avoid synchronization problem | |
3396 | * with the TTVN | |
3397 | */ | |
3398 | if (reduced) | |
3399 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3400 | ||
3401 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3402 | } | |
3403 | ||
e1bf0c14 ML |
3404 | /** |
3405 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3406 | * @bat_priv: the bat priv with all the soft interface information | |
3407 | * @orig: the orig_node of the ogm | |
3408 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3409 | * @tvlv_value: tvlv buffer containing the gateway data | |
3410 | * @tvlv_value_len: tvlv buffer length | |
3411 | */ | |
3412 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3413 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3414 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3415 | uint16_t tvlv_value_len) |
3416 | { | |
7ea7b4a1 AQ |
3417 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3418 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3419 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3420 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3421 | |
3422 | if (tvlv_value_len < sizeof(*tt_data)) | |
3423 | return; | |
3424 | ||
3425 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3426 | tvlv_value_len -= sizeof(*tt_data); | |
3427 | ||
7ea7b4a1 AQ |
3428 | num_vlan = ntohs(tt_data->num_vlan); |
3429 | ||
3430 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3431 | return; | |
3432 | ||
3433 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3434 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3435 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3436 | ||
298e6e68 | 3437 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3438 | |
7ea7b4a1 AQ |
3439 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3440 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3441 | } |
3442 | ||
335fbe0f ML |
3443 | /** |
3444 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3445 | * 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 tvlv is to be re-routed, NET_RX_SUCCESS | |
3453 | * otherwise. | |
3454 | */ | |
3455 | static int batadv_tt_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_tt_data *tt_data; | |
7ea7b4a1 | 3461 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3462 | char tt_flag; |
3463 | bool ret; | |
3464 | ||
3465 | if (tvlv_value_len < sizeof(*tt_data)) | |
3466 | return NET_RX_SUCCESS; | |
3467 | ||
3468 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3469 | tvlv_value_len -= sizeof(*tt_data); | |
3470 | ||
7ea7b4a1 AQ |
3471 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3472 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3473 | ||
3474 | if (tvlv_value_len < tt_vlan_len) | |
3475 | return NET_RX_SUCCESS; | |
3476 | ||
3477 | tvlv_value_len -= tt_vlan_len; | |
3478 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3479 | |
3480 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3481 | case BATADV_TT_REQUEST: | |
3482 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3483 | ||
3484 | /* If this node cannot provide a TT response the tt_request is | |
3485 | * forwarded | |
3486 | */ | |
3487 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3488 | if (!ret) { | |
3489 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3490 | tt_flag = 'F'; | |
3491 | else | |
3492 | tt_flag = '.'; | |
3493 | ||
3494 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3495 | "Routing TT_REQUEST to %pM [%c]\n", | |
3496 | dst, tt_flag); | |
3497 | /* tvlv API will re-route the packet */ | |
3498 | return NET_RX_DROP; | |
3499 | } | |
3500 | break; | |
3501 | case BATADV_TT_RESPONSE: | |
3502 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3503 | ||
3504 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3505 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3506 | src, tt_num_entries); |
335fbe0f ML |
3507 | return NET_RX_SUCCESS; |
3508 | } | |
3509 | ||
3510 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3511 | tt_flag = 'F'; | |
3512 | else | |
3513 | tt_flag = '.'; | |
3514 | ||
3515 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3516 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3517 | ||
3518 | /* tvlv API will re-route the packet */ | |
3519 | return NET_RX_DROP; | |
3520 | } | |
3521 | ||
3522 | return NET_RX_SUCCESS; | |
3523 | } | |
3524 | ||
122edaa0 ML |
3525 | /** |
3526 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3527 | * @bat_priv: the bat priv with all the soft interface information | |
3528 | * @src: mac address of tt tvlv sender | |
3529 | * @dst: mac address of tt tvlv recipient | |
3530 | * @tvlv_value: tvlv buffer containing the tt data | |
3531 | * @tvlv_value_len: tvlv buffer length | |
3532 | * | |
3533 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3534 | * otherwise. | |
3535 | */ | |
3536 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3537 | uint8_t *src, uint8_t *dst, | |
3538 | void *tvlv_value, | |
3539 | uint16_t tvlv_value_len) | |
3540 | { | |
3541 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3542 | struct batadv_orig_node *orig_node = NULL; | |
3543 | ||
3544 | /* If this node is not the intended recipient of the | |
3545 | * roaming advertisement the packet is forwarded | |
3546 | * (the tvlv API will re-route the packet). | |
3547 | */ | |
3548 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3549 | return NET_RX_DROP; | |
3550 | ||
122edaa0 ML |
3551 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3552 | goto out; | |
3553 | ||
3554 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3555 | if (!orig_node) | |
3556 | goto out; | |
3557 | ||
3558 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3559 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3560 | ||
3561 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3562 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3563 | src, roaming_adv->client); | |
3564 | ||
3565 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3566 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3567 | atomic_read(&orig_node->last_ttvn) + 1); |
3568 | ||
3569 | out: | |
3570 | if (orig_node) | |
3571 | batadv_orig_node_free_ref(orig_node); | |
3572 | return NET_RX_SUCCESS; | |
3573 | } | |
3574 | ||
e1bf0c14 ML |
3575 | /** |
3576 | * batadv_tt_init - initialise the translation table internals | |
3577 | * @bat_priv: the bat priv with all the soft interface information | |
3578 | * | |
3579 | * Return 0 on success or negative error number in case of failure. | |
3580 | */ | |
3581 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3582 | { | |
3583 | int ret; | |
3584 | ||
0eb01568 AQ |
3585 | /* synchronized flags must be remote */ |
3586 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3587 | ||
e1bf0c14 ML |
3588 | ret = batadv_tt_local_init(bat_priv); |
3589 | if (ret < 0) | |
3590 | return ret; | |
3591 | ||
3592 | ret = batadv_tt_global_init(bat_priv); | |
3593 | if (ret < 0) | |
3594 | return ret; | |
3595 | ||
3596 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3597 | batadv_tt_tvlv_unicast_handler_v1, |
3598 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3599 | |
122edaa0 ML |
3600 | batadv_tvlv_handler_register(bat_priv, NULL, |
3601 | batadv_roam_tvlv_unicast_handler_v1, | |
3602 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3603 | ||
e1bf0c14 ML |
3604 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3605 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3606 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3607 | ||
3608 | return 1; | |
3609 | } | |
42cb0bef AQ |
3610 | |
3611 | /** | |
3612 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3613 | * @bat_priv: the bat priv with all the soft interface information | |
3614 | * @addr: the mac address of the client | |
3615 | * @vid: the identifier of the VLAN where this client is connected | |
3616 | * | |
3617 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3618 | * otherwise | |
3619 | */ | |
3620 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3621 | const uint8_t *addr, unsigned short vid) | |
3622 | { | |
3623 | struct batadv_tt_global_entry *tt; | |
3624 | bool ret; | |
3625 | ||
3626 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3627 | if (!tt) | |
3628 | return false; | |
3629 | ||
3630 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3631 | ||
3632 | batadv_tt_global_entry_free_ref(tt); | |
3633 | ||
3634 | return ret; | |
3635 | } |