Commit | Line | Data |
---|---|---|
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 | ||
1d8ab8d3 LL |
196 | /** |
197 | * batadv_tt_global_hash_count - count the number of orig entries | |
198 | * @hash: hash table containing the tt entries | |
199 | * @addr: the mac address of the client to count entries for | |
200 | * @vid: VLAN identifier | |
201 | * | |
202 | * Return the number of originators advertising the given address/data | |
203 | * (excluding ourself). | |
204 | */ | |
205 | int batadv_tt_global_hash_count(struct batadv_priv *bat_priv, | |
206 | const uint8_t *addr, unsigned short vid) | |
207 | { | |
208 | struct batadv_tt_global_entry *tt_global_entry; | |
209 | int count; | |
210 | ||
211 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
212 | if (!tt_global_entry) | |
213 | return 0; | |
214 | ||
215 | count = atomic_read(&tt_global_entry->orig_list_count); | |
216 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
217 | ||
218 | return count; | |
219 | } | |
220 | ||
a513088d | 221 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 222 | { |
56303d34 | 223 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 224 | |
56303d34 | 225 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
226 | |
227 | /* We are in an rcu callback here, therefore we cannot use | |
228 | * batadv_orig_node_free_ref() and its call_rcu(): | |
229 | * An rcu_barrier() wouldn't wait for that to finish | |
230 | */ | |
231 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
232 | kfree(orig_entry); |
233 | } | |
234 | ||
7ea7b4a1 AQ |
235 | /** |
236 | * batadv_tt_local_size_mod - change the size by v of the local table identified | |
237 | * by vid | |
238 | * @bat_priv: the bat priv with all the soft interface information | |
239 | * @vid: the VLAN identifier of the sub-table to change | |
240 | * @v: the amount to sum to the local table size | |
241 | */ | |
242 | static void batadv_tt_local_size_mod(struct batadv_priv *bat_priv, | |
243 | unsigned short vid, int v) | |
244 | { | |
245 | struct batadv_softif_vlan *vlan; | |
246 | ||
247 | vlan = batadv_softif_vlan_get(bat_priv, vid); | |
248 | if (!vlan) | |
249 | return; | |
250 | ||
251 | atomic_add(v, &vlan->tt.num_entries); | |
252 | ||
253 | batadv_softif_vlan_free_ref(vlan); | |
254 | } | |
255 | ||
256 | /** | |
257 | * batadv_tt_local_size_inc - increase by one the local table size for the given | |
258 | * vid | |
259 | * @bat_priv: the bat priv with all the soft interface information | |
260 | * @vid: the VLAN identifier | |
261 | */ | |
262 | static void batadv_tt_local_size_inc(struct batadv_priv *bat_priv, | |
263 | unsigned short vid) | |
264 | { | |
265 | batadv_tt_local_size_mod(bat_priv, vid, 1); | |
266 | } | |
267 | ||
268 | /** | |
269 | * batadv_tt_local_size_dec - decrease by one the local table size for the given | |
270 | * vid | |
271 | * @bat_priv: the bat priv with all the soft interface information | |
272 | * @vid: the VLAN identifier | |
273 | */ | |
274 | static void batadv_tt_local_size_dec(struct batadv_priv *bat_priv, | |
275 | unsigned short vid) | |
276 | { | |
277 | batadv_tt_local_size_mod(bat_priv, vid, -1); | |
278 | } | |
279 | ||
280 | /** | |
281 | * batadv_tt_global_size_mod - change the size by v of the local table | |
282 | * identified by vid | |
283 | * @bat_priv: the bat priv with all the soft interface information | |
284 | * @vid: the VLAN identifier | |
285 | * @v: the amount to sum to the global table size | |
286 | */ | |
287 | static void batadv_tt_global_size_mod(struct batadv_orig_node *orig_node, | |
288 | unsigned short vid, int v) | |
289 | { | |
290 | struct batadv_orig_node_vlan *vlan; | |
291 | ||
292 | vlan = batadv_orig_node_vlan_new(orig_node, vid); | |
293 | if (!vlan) | |
294 | return; | |
295 | ||
296 | if (atomic_add_return(v, &vlan->tt.num_entries) == 0) { | |
297 | spin_lock_bh(&orig_node->vlan_list_lock); | |
298 | list_del_rcu(&vlan->list); | |
299 | spin_unlock_bh(&orig_node->vlan_list_lock); | |
300 | batadv_orig_node_vlan_free_ref(vlan); | |
301 | } | |
302 | ||
303 | batadv_orig_node_vlan_free_ref(vlan); | |
304 | } | |
305 | ||
306 | /** | |
307 | * batadv_tt_global_size_inc - increase by one the global table size for the | |
308 | * given vid | |
309 | * @orig_node: the originator which global table size has to be decreased | |
310 | * @vid: the vlan identifier | |
311 | */ | |
312 | static void batadv_tt_global_size_inc(struct batadv_orig_node *orig_node, | |
313 | unsigned short vid) | |
314 | { | |
315 | batadv_tt_global_size_mod(orig_node, vid, 1); | |
316 | } | |
317 | ||
318 | /** | |
319 | * batadv_tt_global_size_dec - decrease by one the global table size for the | |
320 | * given vid | |
321 | * @orig_node: the originator which global table size has to be decreased | |
322 | * @vid: the vlan identifier | |
323 | */ | |
324 | static void batadv_tt_global_size_dec(struct batadv_orig_node *orig_node, | |
325 | unsigned short vid) | |
326 | { | |
327 | batadv_tt_global_size_mod(orig_node, vid, -1); | |
328 | } | |
329 | ||
a513088d | 330 | static void |
56303d34 | 331 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 332 | { |
d657e621 AQ |
333 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
334 | return; | |
7ea7b4a1 | 335 | |
a513088d | 336 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
337 | } |
338 | ||
3abe4adb AQ |
339 | /** |
340 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
341 | * @bat_priv: the bat priv with all the soft interface information | |
342 | * @tt_local_entry: the TT entry involved in the event | |
343 | * @event_flags: flags to store in the event structure | |
344 | */ | |
56303d34 | 345 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
346 | struct batadv_tt_local_entry *tt_local_entry, |
347 | uint8_t event_flags) | |
a73105b8 | 348 | { |
56303d34 | 349 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
350 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
351 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
352 | bool event_removed = false; |
353 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
354 | |
355 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
356 | if (!tt_change_node) |
357 | return; | |
358 | ||
ff66c975 | 359 | tt_change_node->change.flags = flags; |
ca663046 AQ |
360 | memset(tt_change_node->change.reserved, 0, |
361 | sizeof(tt_change_node->change.reserved)); | |
8fdd0153 | 362 | ether_addr_copy(tt_change_node->change.addr, common->addr); |
c018ad3d | 363 | tt_change_node->change.vid = htons(common->vid); |
a73105b8 | 364 | |
acd34afa | 365 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
366 | |
367 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
368 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
369 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 370 | list) { |
3abe4adb | 371 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
372 | continue; |
373 | ||
374 | /* DEL+ADD in the same orig interval have no effect and can be | |
375 | * removed to avoid silly behaviour on the receiver side. The | |
376 | * other way around (ADD+DEL) can happen in case of roaming of | |
377 | * a client still in the NEW state. Roaming of NEW clients is | |
378 | * now possible due to automatically recognition of "temporary" | |
379 | * clients | |
380 | */ | |
acd34afa | 381 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
382 | if (!del_op_requested && del_op_entry) |
383 | goto del; | |
384 | if (del_op_requested && !del_op_entry) | |
385 | goto del; | |
3c4f7ab6 AQ |
386 | |
387 | /* this is a second add in the same originator interval. It | |
388 | * means that flags have been changed: update them! | |
389 | */ | |
390 | if (!del_op_requested && !del_op_entry) | |
391 | entry->change.flags = flags; | |
392 | ||
3b643de5 AQ |
393 | continue; |
394 | del: | |
395 | list_del(&entry->list); | |
396 | kfree(entry); | |
155e4e12 | 397 | kfree(tt_change_node); |
3b643de5 AQ |
398 | event_removed = true; |
399 | goto unlock; | |
400 | } | |
401 | ||
a73105b8 | 402 | /* track the change in the OGMinterval list */ |
807736f6 | 403 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
404 | |
405 | unlock: | |
807736f6 | 406 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 407 | |
3b643de5 | 408 | if (event_removed) |
807736f6 | 409 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 410 | else |
807736f6 | 411 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
412 | } |
413 | ||
335fbe0f ML |
414 | /** |
415 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
416 | * @changes_num: number of tt changes | |
417 | * | |
418 | * Returns computed length in bytes. | |
419 | */ | |
420 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 421 | { |
335fbe0f | 422 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
423 | } |
424 | ||
298e6e68 AQ |
425 | /** |
426 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
427 | * @tt_len: available space | |
428 | * | |
429 | * Returns the number of entries. | |
430 | */ | |
431 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
432 | { | |
433 | return tt_len / batadv_tt_len(1); | |
434 | } | |
435 | ||
a19d3d85 ML |
436 | /** |
437 | * batadv_tt_local_table_transmit_size - calculates the local translation table | |
438 | * size when transmitted over the air | |
439 | * @bat_priv: the bat priv with all the soft interface information | |
440 | * | |
441 | * Returns local translation table size in bytes. | |
442 | */ | |
443 | static int batadv_tt_local_table_transmit_size(struct batadv_priv *bat_priv) | |
444 | { | |
445 | uint16_t num_vlan = 0, tt_local_entries = 0; | |
446 | struct batadv_softif_vlan *vlan; | |
447 | int hdr_size; | |
448 | ||
449 | rcu_read_lock(); | |
450 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
451 | num_vlan++; | |
452 | tt_local_entries += atomic_read(&vlan->tt.num_entries); | |
453 | } | |
454 | rcu_read_unlock(); | |
455 | ||
456 | /* header size of tvlv encapsulated tt response payload */ | |
457 | hdr_size = sizeof(struct batadv_unicast_tvlv_packet); | |
458 | hdr_size += sizeof(struct batadv_tvlv_hdr); | |
459 | hdr_size += sizeof(struct batadv_tvlv_tt_data); | |
460 | hdr_size += num_vlan * sizeof(struct batadv_tvlv_tt_vlan_data); | |
461 | ||
462 | return hdr_size + batadv_tt_len(tt_local_entries); | |
463 | } | |
464 | ||
56303d34 | 465 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 466 | { |
807736f6 | 467 | if (bat_priv->tt.local_hash) |
5346c35e | 468 | return 0; |
c6c8fea2 | 469 | |
807736f6 | 470 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 471 | |
807736f6 | 472 | if (!bat_priv->tt.local_hash) |
5346c35e | 473 | return -ENOMEM; |
c6c8fea2 | 474 | |
dec05074 AQ |
475 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
476 | &batadv_tt_local_hash_lock_class_key); | |
477 | ||
5346c35e | 478 | return 0; |
c6c8fea2 SE |
479 | } |
480 | ||
068ee6e2 AQ |
481 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
482 | struct batadv_tt_global_entry *tt_global, | |
483 | const char *message) | |
484 | { | |
485 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
486 | "Deleting global tt entry %pM (vid: %d): %s\n", |
487 | tt_global->common.addr, | |
488 | BATADV_PRINT_VID(tt_global->common.vid), message); | |
068ee6e2 AQ |
489 | |
490 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
c018ad3d | 491 | batadv_choose_tt, &tt_global->common); |
068ee6e2 | 492 | batadv_tt_global_entry_free_ref(tt_global); |
068ee6e2 AQ |
493 | } |
494 | ||
c018ad3d AQ |
495 | /** |
496 | * batadv_tt_local_add - add a new client to the local table or update an | |
497 | * existing client | |
498 | * @soft_iface: netdev struct of the mesh interface | |
499 | * @addr: the mac address of the client to add | |
500 | * @vid: VLAN identifier | |
501 | * @ifindex: index of the interface where the client is connected to (useful to | |
502 | * identify wireless clients) | |
9464d071 AQ |
503 | * @mark: the value contained in the skb->mark field of the received packet (if |
504 | * any) | |
a19d3d85 ML |
505 | * |
506 | * Returns true if the client was successfully added, false otherwise. | |
c018ad3d | 507 | */ |
a19d3d85 | 508 | bool batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
9464d071 | 509 | unsigned short vid, int ifindex, uint32_t mark) |
c6c8fea2 | 510 | { |
56303d34 | 511 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf | 512 | struct batadv_tt_local_entry *tt_local; |
c5caf4ef | 513 | struct batadv_tt_global_entry *tt_global = NULL; |
0c69aecc | 514 | struct net_device *in_dev = NULL; |
db08e6e5 | 515 | struct hlist_head *head; |
56303d34 | 516 | struct batadv_tt_orig_list_entry *orig_entry; |
a19d3d85 ML |
517 | int hash_added, table_size, packet_size_max; |
518 | bool ret = false, roamed_back = false; | |
3c4f7ab6 | 519 | uint8_t remote_flags; |
9464d071 | 520 | uint32_t match_mark; |
c6c8fea2 | 521 | |
0c69aecc AQ |
522 | if (ifindex != BATADV_NULL_IFINDEX) |
523 | in_dev = dev_get_by_index(&init_net, ifindex); | |
524 | ||
c018ad3d | 525 | tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); |
c5caf4ef LL |
526 | |
527 | if (!is_multicast_ether_addr(addr)) | |
528 | tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
c6c8fea2 | 529 | |
47c94655 AQ |
530 | if (tt_local) { |
531 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
532 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
533 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
534 | "Re-adding pending client %pM (vid: %d)\n", |
535 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
536 | /* whatever the reason why the PENDING flag was set, |
537 | * this is a client which was enqueued to be removed in | |
538 | * this orig_interval. Since it popped up again, the | |
539 | * flag can be reset like it was never enqueued | |
540 | */ | |
541 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
542 | goto add_event; | |
543 | } | |
544 | ||
545 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
546 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
547 | "Roaming client %pM (vid: %d) came back to its original location\n", |
548 | addr, BATADV_PRINT_VID(vid)); | |
068ee6e2 AQ |
549 | /* the ROAM flag is set because this client roamed away |
550 | * and the node got a roaming_advertisement message. Now | |
551 | * that the client popped up again at its original | |
552 | * location such flag can be unset | |
553 | */ | |
554 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
555 | roamed_back = true; | |
556 | } | |
557 | goto check_roaming; | |
c6c8fea2 SE |
558 | } |
559 | ||
a19d3d85 ML |
560 | /* Ignore the client if we cannot send it in a full table response. */ |
561 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
562 | table_size += batadv_tt_len(1); | |
563 | packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
564 | if (table_size > packet_size_max) { | |
565 | net_ratelimited_function(batadv_info, soft_iface, | |
566 | "Local translation table size (%i) exceeds maximum packet size (%i); Ignoring new local tt entry: %pM\n", | |
567 | table_size, packet_size_max, addr); | |
568 | goto out; | |
569 | } | |
570 | ||
47c94655 AQ |
571 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
572 | if (!tt_local) | |
7683fdc1 | 573 | goto out; |
a73105b8 | 574 | |
39c75a51 | 575 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
576 | "Creating new local tt entry: %pM (vid: %d, ttvn: %d)\n", |
577 | addr, BATADV_PRINT_VID(vid), | |
807736f6 | 578 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 579 | |
8fdd0153 | 580 | ether_addr_copy(tt_local->common.addr, addr); |
8425ec6a AQ |
581 | /* The local entry has to be marked as NEW to avoid to send it in |
582 | * a full table response going out before the next ttvn increment | |
583 | * (consistency check) | |
584 | */ | |
585 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
c018ad3d | 586 | tt_local->common.vid = vid; |
0c69aecc | 587 | if (batadv_is_wifi_netdev(in_dev)) |
47c94655 AQ |
588 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
589 | atomic_set(&tt_local->common.refcount, 2); | |
590 | tt_local->last_seen = jiffies; | |
591 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 | 592 | |
c5caf4ef LL |
593 | /* the batman interface mac and multicast addresses should never be |
594 | * purged | |
595 | */ | |
596 | if (batadv_compare_eth(addr, soft_iface->dev_addr) || | |
597 | is_multicast_ether_addr(addr)) | |
47c94655 | 598 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 599 | |
807736f6 | 600 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
c018ad3d | 601 | batadv_choose_tt, &tt_local->common, |
47c94655 | 602 | &tt_local->common.hash_entry); |
80b3f58c SW |
603 | |
604 | if (unlikely(hash_added != 0)) { | |
605 | /* remove the reference for the hash */ | |
47c94655 | 606 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
607 | goto out; |
608 | } | |
609 | ||
068ee6e2 | 610 | add_event: |
3abe4adb | 611 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 612 | |
068ee6e2 AQ |
613 | check_roaming: |
614 | /* Check whether it is a roaming, but don't do anything if the roaming | |
615 | * process has already been handled | |
616 | */ | |
617 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 618 | /* These node are probably going to update their tt table */ |
47c94655 | 619 | head = &tt_global->orig_list; |
db08e6e5 | 620 | rcu_read_lock(); |
b67bfe0d | 621 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 622 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
c018ad3d | 623 | tt_global->common.vid, |
a513088d | 624 | orig_entry->orig_node); |
db08e6e5 SW |
625 | } |
626 | rcu_read_unlock(); | |
068ee6e2 AQ |
627 | if (roamed_back) { |
628 | batadv_tt_global_free(bat_priv, tt_global, | |
629 | "Roaming canceled"); | |
630 | tt_global = NULL; | |
631 | } else { | |
632 | /* The global entry has to be marked as ROAMING and | |
633 | * has to be kept for consistency purpose | |
634 | */ | |
635 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
636 | tt_global->roam_at = jiffies; | |
637 | } | |
7683fdc1 | 638 | } |
068ee6e2 | 639 | |
3c4f7ab6 AQ |
640 | /* store the current remote flags before altering them. This helps |
641 | * understanding is flags are changing or not | |
642 | */ | |
643 | remote_flags = tt_local->common.flags & BATADV_TT_REMOTE_MASK; | |
644 | ||
645 | if (batadv_is_wifi_netdev(in_dev)) | |
646 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; | |
647 | else | |
648 | tt_local->common.flags &= ~BATADV_TT_CLIENT_WIFI; | |
a19d3d85 | 649 | |
9464d071 AQ |
650 | /* check the mark in the skb: if it's equal to the configured |
651 | * isolation_mark, it means the packet is coming from an isolated | |
652 | * non-mesh client | |
653 | */ | |
654 | match_mark = (mark & bat_priv->isolation_mark_mask); | |
655 | if (bat_priv->isolation_mark_mask && | |
656 | match_mark == bat_priv->isolation_mark) | |
657 | tt_local->common.flags |= BATADV_TT_CLIENT_ISOLA; | |
658 | else | |
659 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ISOLA; | |
660 | ||
3c4f7ab6 AQ |
661 | /* if any "dynamic" flag has been modified, resend an ADD event for this |
662 | * entry so that all the nodes can get the new flags | |
663 | */ | |
664 | if (remote_flags ^ (tt_local->common.flags & BATADV_TT_REMOTE_MASK)) | |
665 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); | |
666 | ||
667 | ret = true; | |
7683fdc1 | 668 | out: |
0c69aecc AQ |
669 | if (in_dev) |
670 | dev_put(in_dev); | |
47c94655 AQ |
671 | if (tt_local) |
672 | batadv_tt_local_entry_free_ref(tt_local); | |
673 | if (tt_global) | |
674 | batadv_tt_global_entry_free_ref(tt_global); | |
a19d3d85 | 675 | return ret; |
c6c8fea2 SE |
676 | } |
677 | ||
7ea7b4a1 AQ |
678 | /** |
679 | * batadv_tt_prepare_tvlv_global_data - prepare the TVLV TT header to send | |
680 | * within a TT Response directed to another node | |
681 | * @orig_node: originator for which the TT data has to be prepared | |
682 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
683 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
684 | * changed can be stored | |
685 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
686 | * function reserves the amount of space needed to send the entire global TT | |
687 | * table. In case of success the value is updated with the real amount of | |
688 | * reserved bytes | |
689 | ||
690 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
691 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
692 | * objects, one per active VLAN served by the originator node. | |
693 | * | |
694 | * Return the size of the allocated buffer or 0 in case of failure. | |
695 | */ | |
696 | static uint16_t | |
697 | batadv_tt_prepare_tvlv_global_data(struct batadv_orig_node *orig_node, | |
698 | struct batadv_tvlv_tt_data **tt_data, | |
699 | struct batadv_tvlv_tt_change **tt_change, | |
700 | int32_t *tt_len) | |
701 | { | |
702 | uint16_t num_vlan = 0, num_entries = 0, change_offset, tvlv_len; | |
703 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
704 | struct batadv_orig_node_vlan *vlan; | |
705 | uint8_t *tt_change_ptr; | |
706 | ||
707 | rcu_read_lock(); | |
708 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
709 | num_vlan++; | |
710 | num_entries += atomic_read(&vlan->tt.num_entries); | |
711 | } | |
712 | ||
713 | change_offset = sizeof(**tt_data); | |
714 | change_offset += num_vlan * sizeof(*tt_vlan); | |
715 | ||
716 | /* if tt_len is negative, allocate the space needed by the full table */ | |
717 | if (*tt_len < 0) | |
718 | *tt_len = batadv_tt_len(num_entries); | |
719 | ||
720 | tvlv_len = *tt_len; | |
721 | tvlv_len += change_offset; | |
722 | ||
723 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
724 | if (!*tt_data) { | |
725 | *tt_len = 0; | |
726 | goto out; | |
727 | } | |
728 | ||
729 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
730 | (*tt_data)->ttvn = atomic_read(&orig_node->last_ttvn); | |
731 | (*tt_data)->num_vlan = htons(num_vlan); | |
732 | ||
733 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
734 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
735 | tt_vlan->vid = htons(vlan->vid); | |
736 | tt_vlan->crc = htonl(vlan->tt.crc); | |
737 | ||
738 | tt_vlan++; | |
739 | } | |
740 | ||
741 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
742 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
743 | ||
744 | out: | |
745 | rcu_read_unlock(); | |
746 | return tvlv_len; | |
747 | } | |
748 | ||
749 | /** | |
750 | * batadv_tt_prepare_tvlv_local_data - allocate and prepare the TT TVLV for this | |
751 | * node | |
752 | * @bat_priv: the bat priv with all the soft interface information | |
753 | * @tt_data: uninitialised pointer to the address of the TVLV buffer | |
754 | * @tt_change: uninitialised pointer to the address of the area where the TT | |
755 | * changes can be stored | |
756 | * @tt_len: pointer to the length to reserve to the tt_change. if -1 this | |
757 | * function reserves the amount of space needed to send the entire local TT | |
758 | * table. In case of success the value is updated with the real amount of | |
759 | * reserved bytes | |
760 | * | |
761 | * Allocate the needed amount of memory for the entire TT TVLV and write its | |
762 | * header made up by one tvlv_tt_data object and a series of tvlv_tt_vlan_data | |
763 | * objects, one per active VLAN. | |
764 | * | |
765 | * Return the size of the allocated buffer or 0 in case of failure. | |
766 | */ | |
767 | static uint16_t | |
768 | batadv_tt_prepare_tvlv_local_data(struct batadv_priv *bat_priv, | |
769 | struct batadv_tvlv_tt_data **tt_data, | |
770 | struct batadv_tvlv_tt_change **tt_change, | |
771 | int32_t *tt_len) | |
772 | { | |
773 | struct batadv_tvlv_tt_vlan_data *tt_vlan; | |
774 | struct batadv_softif_vlan *vlan; | |
775 | uint16_t num_vlan = 0, num_entries = 0, tvlv_len; | |
776 | uint8_t *tt_change_ptr; | |
777 | int change_offset; | |
778 | ||
779 | rcu_read_lock(); | |
780 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
781 | num_vlan++; | |
782 | num_entries += atomic_read(&vlan->tt.num_entries); | |
783 | } | |
784 | ||
785 | change_offset = sizeof(**tt_data); | |
786 | change_offset += num_vlan * sizeof(*tt_vlan); | |
787 | ||
788 | /* if tt_len is negative, allocate the space needed by the full table */ | |
789 | if (*tt_len < 0) | |
790 | *tt_len = batadv_tt_len(num_entries); | |
791 | ||
792 | tvlv_len = *tt_len; | |
793 | tvlv_len += change_offset; | |
794 | ||
795 | *tt_data = kmalloc(tvlv_len, GFP_ATOMIC); | |
796 | if (!*tt_data) { | |
797 | tvlv_len = 0; | |
798 | goto out; | |
799 | } | |
800 | ||
801 | (*tt_data)->flags = BATADV_NO_FLAGS; | |
802 | (*tt_data)->ttvn = atomic_read(&bat_priv->tt.vn); | |
803 | (*tt_data)->num_vlan = htons(num_vlan); | |
804 | ||
805 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(*tt_data + 1); | |
806 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
807 | tt_vlan->vid = htons(vlan->vid); | |
808 | tt_vlan->crc = htonl(vlan->tt.crc); | |
809 | ||
810 | tt_vlan++; | |
811 | } | |
812 | ||
813 | tt_change_ptr = (uint8_t *)*tt_data + change_offset; | |
814 | *tt_change = (struct batadv_tvlv_tt_change *)tt_change_ptr; | |
815 | ||
816 | out: | |
817 | rcu_read_unlock(); | |
818 | return tvlv_len; | |
819 | } | |
820 | ||
e1bf0c14 ML |
821 | /** |
822 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
823 | * after local tt changes have been committed | |
824 | * @bat_priv: the bat priv with all the soft interface information | |
825 | */ | |
826 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 827 | { |
e1bf0c14 ML |
828 | struct batadv_tt_change_node *entry, *safe; |
829 | struct batadv_tvlv_tt_data *tt_data; | |
830 | struct batadv_tvlv_tt_change *tt_change; | |
7ea7b4a1 | 831 | int tt_diff_len, tt_change_len = 0; |
e1bf0c14 | 832 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; |
7ea7b4a1 | 833 | uint16_t tvlv_len; |
be9aa4c1 | 834 | |
7ea7b4a1 AQ |
835 | tt_diff_entries_num = atomic_read(&bat_priv->tt.local_changes); |
836 | tt_diff_len = batadv_tt_len(tt_diff_entries_num); | |
be9aa4c1 ML |
837 | |
838 | /* if we have too many changes for one packet don't send any | |
839 | * and wait for the tt table request which will be fragmented | |
840 | */ | |
e1bf0c14 ML |
841 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
842 | tt_diff_len = 0; | |
be9aa4c1 | 843 | |
7ea7b4a1 AQ |
844 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, &tt_data, |
845 | &tt_change, &tt_diff_len); | |
846 | if (!tvlv_len) | |
e1bf0c14 | 847 | return; |
be9aa4c1 | 848 | |
e1bf0c14 | 849 | tt_data->flags = BATADV_TT_OGM_DIFF; |
c6c8fea2 | 850 | |
e1bf0c14 ML |
851 | if (tt_diff_len == 0) |
852 | goto container_register; | |
be9aa4c1 | 853 | |
807736f6 SE |
854 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
855 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 856 | |
807736f6 | 857 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 858 | list) { |
e1bf0c14 ML |
859 | if (tt_diff_entries_count < tt_diff_entries_num) { |
860 | memcpy(tt_change + tt_diff_entries_count, | |
861 | &entry->change, | |
862 | sizeof(struct batadv_tvlv_tt_change)); | |
863 | tt_diff_entries_count++; | |
c6c8fea2 | 864 | } |
a73105b8 AQ |
865 | list_del(&entry->list); |
866 | kfree(entry); | |
c6c8fea2 | 867 | } |
807736f6 | 868 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
869 | |
870 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
871 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
872 | kfree(bat_priv->tt.last_changeset); | |
873 | bat_priv->tt.last_changeset_len = 0; | |
874 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 875 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 876 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 877 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 878 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
879 | * instead of providing the diff |
880 | */ | |
e1bf0c14 | 881 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 882 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
883 | memcpy(bat_priv->tt.last_changeset, |
884 | tt_change, tt_change_len); | |
885 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
886 | } |
887 | } | |
807736f6 | 888 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 889 | |
e1bf0c14 ML |
890 | container_register: |
891 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
7ea7b4a1 | 892 | tvlv_len); |
e1bf0c14 | 893 | kfree(tt_data); |
c6c8fea2 SE |
894 | } |
895 | ||
08c36d3e | 896 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
897 | { |
898 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 899 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 900 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 901 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 902 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 903 | struct batadv_hard_iface *primary_if; |
7ea7b4a1 | 904 | struct batadv_softif_vlan *vlan; |
c6c8fea2 | 905 | struct hlist_head *head; |
7ea7b4a1 | 906 | unsigned short vid; |
c90681b8 | 907 | uint32_t i; |
85766a82 AQ |
908 | int last_seen_secs; |
909 | int last_seen_msecs; | |
910 | unsigned long last_seen_jiffies; | |
911 | bool no_purge; | |
912 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 913 | |
30da63a6 ML |
914 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
915 | if (!primary_if) | |
32ae9b22 | 916 | goto out; |
c6c8fea2 | 917 | |
86ceb360 | 918 | seq_printf(seq, |
7ea7b4a1 AQ |
919 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", |
920 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); | |
dd24ddb2 | 921 | seq_printf(seq, " %-13s %s %-8s %-9s (%-10s)\n", "Client", "VID", |
7ea7b4a1 | 922 | "Flags", "Last seen", "CRC"); |
c6c8fea2 | 923 | |
c6c8fea2 SE |
924 | for (i = 0; i < hash->size; i++) { |
925 | head = &hash->table[i]; | |
926 | ||
7aadf889 | 927 | rcu_read_lock(); |
b67bfe0d | 928 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 929 | head, hash_entry) { |
85766a82 AQ |
930 | tt_local = container_of(tt_common_entry, |
931 | struct batadv_tt_local_entry, | |
932 | common); | |
7ea7b4a1 | 933 | vid = tt_common_entry->vid; |
85766a82 AQ |
934 | last_seen_jiffies = jiffies - tt_local->last_seen; |
935 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
936 | last_seen_secs = last_seen_msecs / 1000; | |
937 | last_seen_msecs = last_seen_msecs % 1000; | |
938 | ||
939 | no_purge = tt_common_entry->flags & np_flag; | |
940 | ||
7ea7b4a1 AQ |
941 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
942 | if (!vlan) { | |
943 | seq_printf(seq, "Cannot retrieve VLAN %d\n", | |
944 | BATADV_PRINT_VID(vid)); | |
945 | continue; | |
946 | } | |
947 | ||
948 | seq_printf(seq, | |
dd24ddb2 | 949 | " * %pM %4i [%c%c%c%c%c%c] %3u.%03u (%#.8x)\n", |
7c64fd98 | 950 | tt_common_entry->addr, |
16052789 | 951 | BATADV_PRINT_VID(tt_common_entry->vid), |
7c64fd98 | 952 | (tt_common_entry->flags & |
acd34afa | 953 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 954 | no_purge ? 'P' : '.', |
7c64fd98 | 955 | (tt_common_entry->flags & |
acd34afa | 956 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 957 | (tt_common_entry->flags & |
acd34afa | 958 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 959 | (tt_common_entry->flags & |
85766a82 | 960 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 AQ |
961 | (tt_common_entry->flags & |
962 | BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), | |
a7966d90 | 963 | no_purge ? 0 : last_seen_secs, |
7ea7b4a1 AQ |
964 | no_purge ? 0 : last_seen_msecs, |
965 | vlan->tt.crc); | |
966 | ||
967 | batadv_softif_vlan_free_ref(vlan); | |
c6c8fea2 | 968 | } |
7aadf889 | 969 | rcu_read_unlock(); |
c6c8fea2 | 970 | } |
32ae9b22 ML |
971 | out: |
972 | if (primary_if) | |
e5d89254 | 973 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 974 | return 0; |
c6c8fea2 SE |
975 | } |
976 | ||
56303d34 SE |
977 | static void |
978 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
979 | struct batadv_tt_local_entry *tt_local_entry, | |
980 | uint16_t flags, const char *message) | |
c6c8fea2 | 981 | { |
3abe4adb | 982 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 983 | |
015758d0 AQ |
984 | /* The local client has to be marked as "pending to be removed" but has |
985 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
986 | * response issued before the net ttvn increment (consistency check) |
987 | */ | |
acd34afa | 988 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 989 | |
39c75a51 | 990 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
991 | "Local tt entry (%pM, vid: %d) pending to be removed: %s\n", |
992 | tt_local_entry->common.addr, | |
993 | BATADV_PRINT_VID(tt_local_entry->common.vid), message); | |
c6c8fea2 SE |
994 | } |
995 | ||
7f91d06c AQ |
996 | /** |
997 | * batadv_tt_local_remove - logically remove an entry from the local table | |
998 | * @bat_priv: the bat priv with all the soft interface information | |
999 | * @addr: the MAC address of the client to remove | |
c018ad3d | 1000 | * @vid: VLAN identifier |
7f91d06c AQ |
1001 | * @message: message to append to the log on deletion |
1002 | * @roaming: true if the deletion is due to a roaming event | |
1003 | * | |
1004 | * Returns the flags assigned to the local entry before being deleted | |
1005 | */ | |
1006 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
c018ad3d AQ |
1007 | const uint8_t *addr, unsigned short vid, |
1008 | const char *message, bool roaming) | |
c6c8fea2 | 1009 | { |
170173bf | 1010 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 1011 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 1012 | |
c018ad3d | 1013 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
1014 | if (!tt_local_entry) |
1015 | goto out; | |
1016 | ||
7f91d06c AQ |
1017 | curr_flags = tt_local_entry->common.flags; |
1018 | ||
acd34afa | 1019 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
1020 | /* if this global entry addition is due to a roaming, the node has to |
1021 | * mark the local entry as "roamed" in order to correctly reroute | |
1022 | * packets later | |
1023 | */ | |
7c1fd91d | 1024 | if (roaming) { |
acd34afa | 1025 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
1026 | /* mark the local client as ROAMed */ |
1027 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
1028 | } | |
42d0b044 | 1029 | |
068ee6e2 AQ |
1030 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
1031 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
1032 | message); | |
1033 | goto out; | |
1034 | } | |
1035 | /* if this client has been added right now, it is possible to | |
1036 | * immediately purge it | |
1037 | */ | |
3abe4adb | 1038 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
1039 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
1040 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 1041 | |
7683fdc1 AQ |
1042 | out: |
1043 | if (tt_local_entry) | |
a513088d | 1044 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
1045 | |
1046 | return curr_flags; | |
c6c8fea2 SE |
1047 | } |
1048 | ||
a19d3d85 ML |
1049 | /** |
1050 | * batadv_tt_local_purge_list - purge inactive tt local entries | |
1051 | * @bat_priv: the bat priv with all the soft interface information | |
1052 | * @head: pointer to the list containing the local tt entries | |
1053 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1054 | * inactive or not | |
1055 | */ | |
56303d34 | 1056 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
a19d3d85 ML |
1057 | struct hlist_head *head, |
1058 | int timeout) | |
c6c8fea2 | 1059 | { |
56303d34 SE |
1060 | struct batadv_tt_local_entry *tt_local_entry; |
1061 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 1062 | struct hlist_node *node_tmp; |
acd34afa | 1063 | |
b67bfe0d | 1064 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
1065 | hash_entry) { |
1066 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
1067 | struct batadv_tt_local_entry, |
1068 | common); | |
acd34afa SE |
1069 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
1070 | continue; | |
1071 | ||
1072 | /* entry already marked for deletion */ | |
1073 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
1074 | continue; | |
1075 | ||
a19d3d85 | 1076 | if (!batadv_has_timed_out(tt_local_entry->last_seen, timeout)) |
acd34afa SE |
1077 | continue; |
1078 | ||
1079 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
1080 | BATADV_TT_CLIENT_DEL, "timed out"); | |
1081 | } | |
1082 | } | |
1083 | ||
a19d3d85 ML |
1084 | /** |
1085 | * batadv_tt_local_purge - purge inactive tt local entries | |
1086 | * @bat_priv: the bat priv with all the soft interface information | |
1087 | * @timeout: parameter deciding whether a given tt local entry is considered | |
1088 | * inactive or not | |
1089 | */ | |
1090 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv, | |
1091 | int timeout) | |
acd34afa | 1092 | { |
807736f6 | 1093 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 1094 | struct hlist_head *head; |
7683fdc1 | 1095 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1096 | uint32_t i; |
c6c8fea2 | 1097 | |
c6c8fea2 SE |
1098 | for (i = 0; i < hash->size; i++) { |
1099 | head = &hash->table[i]; | |
7683fdc1 | 1100 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1101 | |
7683fdc1 | 1102 | spin_lock_bh(list_lock); |
a19d3d85 | 1103 | batadv_tt_local_purge_list(bat_priv, head, timeout); |
7683fdc1 | 1104 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1105 | } |
c6c8fea2 SE |
1106 | } |
1107 | ||
56303d34 | 1108 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1109 | { |
5bf74e9c | 1110 | struct batadv_hashtable *hash; |
a73105b8 | 1111 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1112 | struct batadv_tt_common_entry *tt_common_entry; |
1113 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 1114 | struct hlist_node *node_tmp; |
7683fdc1 | 1115 | struct hlist_head *head; |
c90681b8 | 1116 | uint32_t i; |
a73105b8 | 1117 | |
807736f6 | 1118 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
1119 | return; |
1120 | ||
807736f6 | 1121 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
1122 | |
1123 | for (i = 0; i < hash->size; i++) { | |
1124 | head = &hash->table[i]; | |
1125 | list_lock = &hash->list_locks[i]; | |
1126 | ||
1127 | spin_lock_bh(list_lock); | |
b67bfe0d | 1128 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 1129 | head, hash_entry) { |
b67bfe0d | 1130 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1131 | tt_local = container_of(tt_common_entry, |
1132 | struct batadv_tt_local_entry, | |
1133 | common); | |
1134 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
1135 | } |
1136 | spin_unlock_bh(list_lock); | |
1137 | } | |
1138 | ||
1a8eaf07 | 1139 | batadv_hash_destroy(hash); |
a73105b8 | 1140 | |
807736f6 | 1141 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
1142 | } |
1143 | ||
56303d34 | 1144 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 1145 | { |
807736f6 | 1146 | if (bat_priv->tt.global_hash) |
5346c35e | 1147 | return 0; |
c6c8fea2 | 1148 | |
807736f6 | 1149 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 1150 | |
807736f6 | 1151 | if (!bat_priv->tt.global_hash) |
5346c35e | 1152 | return -ENOMEM; |
c6c8fea2 | 1153 | |
dec05074 AQ |
1154 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
1155 | &batadv_tt_global_hash_lock_class_key); | |
1156 | ||
5346c35e | 1157 | return 0; |
c6c8fea2 SE |
1158 | } |
1159 | ||
56303d34 | 1160 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1161 | { |
56303d34 | 1162 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 1163 | |
807736f6 | 1164 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 1165 | |
807736f6 | 1166 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
1167 | list) { |
1168 | list_del(&entry->list); | |
1169 | kfree(entry); | |
1170 | } | |
c6c8fea2 | 1171 | |
807736f6 SE |
1172 | atomic_set(&bat_priv->tt.local_changes, 0); |
1173 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 1174 | } |
c6c8fea2 | 1175 | |
d657e621 AQ |
1176 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
1177 | * batadv_tt_global_entry list | |
1178 | * | |
1179 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 1180 | */ |
d657e621 AQ |
1181 | static struct batadv_tt_orig_list_entry * |
1182 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
1183 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 1184 | { |
d657e621 | 1185 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 1186 | const struct hlist_head *head; |
db08e6e5 SW |
1187 | |
1188 | rcu_read_lock(); | |
1189 | head = &entry->orig_list; | |
b67bfe0d | 1190 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
1191 | if (tmp_orig_entry->orig_node != orig_node) |
1192 | continue; | |
1193 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
1194 | continue; | |
1195 | ||
1196 | orig_entry = tmp_orig_entry; | |
1197 | break; | |
db08e6e5 SW |
1198 | } |
1199 | rcu_read_unlock(); | |
d657e621 AQ |
1200 | |
1201 | return orig_entry; | |
1202 | } | |
1203 | ||
1204 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
1205 | * returns true if found, false otherwise | |
1206 | */ | |
1207 | static bool | |
1208 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
1209 | const struct batadv_orig_node *orig_node) | |
1210 | { | |
1211 | struct batadv_tt_orig_list_entry *orig_entry; | |
1212 | bool found = false; | |
1213 | ||
1214 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
1215 | if (orig_entry) { | |
1216 | found = true; | |
1217 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1218 | } | |
1219 | ||
db08e6e5 SW |
1220 | return found; |
1221 | } | |
1222 | ||
a513088d | 1223 | static void |
d657e621 | 1224 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 1225 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 1226 | { |
56303d34 | 1227 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1228 | |
d657e621 | 1229 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
1230 | if (orig_entry) { |
1231 | /* refresh the ttvn: the current value could be a bogus one that | |
1232 | * was added during a "temporary client detection" | |
1233 | */ | |
1234 | orig_entry->ttvn = ttvn; | |
d657e621 | 1235 | goto out; |
30cfd02b | 1236 | } |
d657e621 | 1237 | |
db08e6e5 SW |
1238 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
1239 | if (!orig_entry) | |
d657e621 | 1240 | goto out; |
db08e6e5 SW |
1241 | |
1242 | INIT_HLIST_NODE(&orig_entry->list); | |
1243 | atomic_inc(&orig_node->refcount); | |
7ea7b4a1 | 1244 | batadv_tt_global_size_inc(orig_node, tt_global->common.vid); |
db08e6e5 SW |
1245 | orig_entry->orig_node = orig_node; |
1246 | orig_entry->ttvn = ttvn; | |
d657e621 | 1247 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 1248 | |
d657e621 | 1249 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 1250 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
1251 | &tt_global->orig_list); |
1252 | spin_unlock_bh(&tt_global->list_lock); | |
1d8ab8d3 LL |
1253 | atomic_inc(&tt_global->orig_list_count); |
1254 | ||
d657e621 AQ |
1255 | out: |
1256 | if (orig_entry) | |
1257 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
1258 | } |
1259 | ||
d4ff40f6 AQ |
1260 | /** |
1261 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
1262 | * @bat_priv: the bat priv with all the soft interface information | |
1263 | * @orig_node: the originator announcing the client | |
1264 | * @tt_addr: the mac address of the non-mesh client | |
c018ad3d | 1265 | * @vid: VLAN identifier |
d4ff40f6 AQ |
1266 | * @flags: TT flags that have to be set for this non-mesh client |
1267 | * @ttvn: the tt version number ever announcing this non-mesh client | |
1268 | * | |
1269 | * Add a new TT global entry for the given originator. If the entry already | |
1270 | * exists add a new reference to the given originator (a global entry can have | |
1271 | * references to multiple originators) and adjust the flags attribute to reflect | |
1272 | * the function argument. | |
1273 | * If a TT local entry exists for this non-mesh client remove it. | |
1274 | * | |
1275 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
1276 | * |
1277 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 1278 | */ |
1e5d49fc AQ |
1279 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
1280 | struct batadv_orig_node *orig_node, | |
c018ad3d AQ |
1281 | const unsigned char *tt_addr, |
1282 | unsigned short vid, uint16_t flags, | |
1e5d49fc | 1283 | uint8_t ttvn) |
a73105b8 | 1284 | { |
170173bf SE |
1285 | struct batadv_tt_global_entry *tt_global_entry; |
1286 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 1287 | bool ret = false; |
80b3f58c | 1288 | int hash_added; |
56303d34 | 1289 | struct batadv_tt_common_entry *common; |
7f91d06c | 1290 | uint16_t local_flags; |
c6c8fea2 | 1291 | |
cfd4f757 AQ |
1292 | /* ignore global entries from backbone nodes */ |
1293 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) | |
1294 | return true; | |
1295 | ||
c018ad3d AQ |
1296 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr, vid); |
1297 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr, vid); | |
068ee6e2 AQ |
1298 | |
1299 | /* if the node already has a local client for this entry, it has to wait | |
1300 | * for a roaming advertisement instead of manually messing up the global | |
1301 | * table | |
1302 | */ | |
1303 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
1304 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
1305 | goto out; | |
a73105b8 AQ |
1306 | |
1307 | if (!tt_global_entry) { | |
d4f44692 | 1308 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 1309 | if (!tt_global_entry) |
7683fdc1 AQ |
1310 | goto out; |
1311 | ||
c0a55929 | 1312 | common = &tt_global_entry->common; |
8fdd0153 | 1313 | ether_addr_copy(common->addr, tt_addr); |
c018ad3d | 1314 | common->vid = vid; |
db08e6e5 | 1315 | |
d4f44692 | 1316 | common->flags = flags; |
cc47f66e | 1317 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
1318 | /* node must store current time in case of roaming. This is |
1319 | * needed to purge this entry out on timeout (if nobody claims | |
1320 | * it) | |
1321 | */ | |
1322 | if (flags & BATADV_TT_CLIENT_ROAM) | |
1323 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 1324 | atomic_set(&common->refcount, 2); |
30cfd02b | 1325 | common->added_at = jiffies; |
db08e6e5 SW |
1326 | |
1327 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
1d8ab8d3 | 1328 | atomic_set(&tt_global_entry->orig_list_count, 0); |
db08e6e5 | 1329 | spin_lock_init(&tt_global_entry->list_lock); |
7683fdc1 | 1330 | |
807736f6 | 1331 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d | 1332 | batadv_compare_tt, |
c018ad3d | 1333 | batadv_choose_tt, common, |
a513088d | 1334 | &common->hash_entry); |
80b3f58c SW |
1335 | |
1336 | if (unlikely(hash_added != 0)) { | |
1337 | /* remove the reference for the hash */ | |
a513088d | 1338 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
1339 | goto out_remove; |
1340 | } | |
a73105b8 | 1341 | } else { |
068ee6e2 | 1342 | common = &tt_global_entry->common; |
30cfd02b AQ |
1343 | /* If there is already a global entry, we can use this one for |
1344 | * our processing. | |
068ee6e2 AQ |
1345 | * But if we are trying to add a temporary client then here are |
1346 | * two options at this point: | |
1347 | * 1) the global client is not a temporary client: the global | |
1348 | * client has to be left as it is, temporary information | |
1349 | * should never override any already known client state | |
1350 | * 2) the global client is a temporary client: purge the | |
1351 | * originator list and add the new one orig_entry | |
30cfd02b | 1352 | */ |
068ee6e2 AQ |
1353 | if (flags & BATADV_TT_CLIENT_TEMP) { |
1354 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
1355 | goto out; | |
1356 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
1357 | orig_node)) | |
1358 | goto out_remove; | |
1359 | batadv_tt_global_del_orig_list(tt_global_entry); | |
1360 | goto add_orig_entry; | |
1361 | } | |
30cfd02b AQ |
1362 | |
1363 | /* if the client was temporary added before receiving the first | |
1364 | * OGM announcing it, we have to clear the TEMP flag | |
1365 | */ | |
068ee6e2 | 1366 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 1367 | |
e9c00136 AQ |
1368 | /* the change can carry possible "attribute" flags like the |
1369 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
1370 | * client entry | |
1371 | */ | |
1372 | tt_global_entry->common.flags |= flags; | |
1373 | ||
acd34afa SE |
1374 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
1375 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
1376 | * delete + roaming change for this originator. |
1377 | * | |
1378 | * We should first delete the old originator before adding the | |
1379 | * new one. | |
1380 | */ | |
068ee6e2 | 1381 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 1382 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 1383 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 1384 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
1385 | } |
1386 | } | |
068ee6e2 | 1387 | add_orig_entry: |
30cfd02b | 1388 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 1389 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 1390 | |
39c75a51 | 1391 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1392 | "Creating new global tt entry: %pM (vid: %d, via %pM)\n", |
1393 | common->addr, BATADV_PRINT_VID(common->vid), | |
1394 | orig_node->orig); | |
1e5d49fc | 1395 | ret = true; |
c6c8fea2 | 1396 | |
80b3f58c | 1397 | out_remove: |
c5caf4ef LL |
1398 | /* Do not remove multicast addresses from the local hash on |
1399 | * global additions | |
1400 | */ | |
1401 | if (is_multicast_ether_addr(tt_addr)) | |
1402 | goto out; | |
7f91d06c | 1403 | |
a73105b8 | 1404 | /* remove address from local hash if present */ |
c018ad3d | 1405 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, vid, |
7f91d06c | 1406 | "global tt received", |
c1d07431 | 1407 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
1408 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
1409 | ||
068ee6e2 AQ |
1410 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
1411 | /* this is a normal global add. Therefore the client is not in a | |
1412 | * roaming state anymore. | |
1413 | */ | |
1414 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
1415 | ||
7683fdc1 AQ |
1416 | out: |
1417 | if (tt_global_entry) | |
a513088d | 1418 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
1419 | if (tt_local_entry) |
1420 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 1421 | return ret; |
c6c8fea2 SE |
1422 | } |
1423 | ||
1b371d13 SW |
1424 | /** |
1425 | * batadv_transtable_best_orig - Get best originator list entry from tt entry | |
4627456a | 1426 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1427 | * @tt_global_entry: global translation table entry to be analyzed |
1428 | * | |
1429 | * This functon assumes the caller holds rcu_read_lock(). | |
1430 | * Returns best originator list entry or NULL on errors. | |
1431 | */ | |
1432 | static struct batadv_tt_orig_list_entry * | |
4627456a AQ |
1433 | batadv_transtable_best_orig(struct batadv_priv *bat_priv, |
1434 | struct batadv_tt_global_entry *tt_global_entry) | |
981d8900 | 1435 | { |
4627456a AQ |
1436 | struct batadv_neigh_node *router, *best_router = NULL; |
1437 | struct batadv_algo_ops *bao = bat_priv->bat_algo_ops; | |
981d8900 | 1438 | struct hlist_head *head; |
981d8900 | 1439 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
981d8900 SE |
1440 | |
1441 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1442 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
7351a482 SW |
1443 | router = batadv_orig_router_get(orig_entry->orig_node, |
1444 | BATADV_IF_DEFAULT); | |
981d8900 SE |
1445 | if (!router) |
1446 | continue; | |
1447 | ||
4627456a | 1448 | if (best_router && |
89652331 SW |
1449 | bao->bat_neigh_cmp(router, BATADV_IF_DEFAULT, |
1450 | best_router, BATADV_IF_DEFAULT) <= 0) { | |
4627456a AQ |
1451 | batadv_neigh_node_free_ref(router); |
1452 | continue; | |
981d8900 SE |
1453 | } |
1454 | ||
4627456a AQ |
1455 | /* release the refcount for the "old" best */ |
1456 | if (best_router) | |
1457 | batadv_neigh_node_free_ref(best_router); | |
1458 | ||
1459 | best_entry = orig_entry; | |
1460 | best_router = router; | |
981d8900 SE |
1461 | } |
1462 | ||
4627456a AQ |
1463 | if (best_router) |
1464 | batadv_neigh_node_free_ref(best_router); | |
1465 | ||
981d8900 SE |
1466 | return best_entry; |
1467 | } | |
1468 | ||
1b371d13 SW |
1469 | /** |
1470 | * batadv_tt_global_print_entry - print all orig nodes who announce the address | |
1471 | * for this global entry | |
4627456a | 1472 | * @bat_priv: the bat priv with all the soft interface information |
981d8900 SE |
1473 | * @tt_global_entry: global translation table entry to be printed |
1474 | * @seq: debugfs table seq_file struct | |
1475 | * | |
1476 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 1477 | */ |
a513088d | 1478 | static void |
4627456a AQ |
1479 | batadv_tt_global_print_entry(struct batadv_priv *bat_priv, |
1480 | struct batadv_tt_global_entry *tt_global_entry, | |
a513088d | 1481 | struct seq_file *seq) |
db08e6e5 | 1482 | { |
981d8900 | 1483 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 1484 | struct batadv_tt_common_entry *tt_common_entry; |
7ea7b4a1 AQ |
1485 | struct batadv_orig_node_vlan *vlan; |
1486 | struct hlist_head *head; | |
db08e6e5 | 1487 | uint8_t last_ttvn; |
7ea7b4a1 | 1488 | uint16_t flags; |
db08e6e5 SW |
1489 | |
1490 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
1491 | flags = tt_common_entry->flags; |
1492 | ||
4627456a | 1493 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
981d8900 | 1494 | if (best_entry) { |
7ea7b4a1 AQ |
1495 | vlan = batadv_orig_node_vlan_get(best_entry->orig_node, |
1496 | tt_common_entry->vid); | |
1497 | if (!vlan) { | |
1498 | seq_printf(seq, | |
1499 | " * Cannot retrieve VLAN %d for originator %pM\n", | |
1500 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1501 | best_entry->orig_node->orig); | |
1502 | goto print_list; | |
1503 | } | |
1504 | ||
981d8900 | 1505 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); |
f9d8a537 | 1506 | seq_printf(seq, |
dd24ddb2 | 1507 | " %c %pM %4i (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1508 | '*', tt_global_entry->common.addr, |
16052789 | 1509 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1510 | best_entry->ttvn, best_entry->orig_node->orig, |
7ea7b4a1 | 1511 | last_ttvn, vlan->tt.crc, |
981d8900 SE |
1512 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1513 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
dd24ddb2 | 1514 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
981d8900 | 1515 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1516 | |
1517 | batadv_orig_node_vlan_free_ref(vlan); | |
981d8900 | 1518 | } |
db08e6e5 | 1519 | |
7ea7b4a1 | 1520 | print_list: |
db08e6e5 SW |
1521 | head = &tt_global_entry->orig_list; |
1522 | ||
b67bfe0d | 1523 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1524 | if (best_entry == orig_entry) |
1525 | continue; | |
1526 | ||
7ea7b4a1 AQ |
1527 | vlan = batadv_orig_node_vlan_get(orig_entry->orig_node, |
1528 | tt_common_entry->vid); | |
1529 | if (!vlan) { | |
1530 | seq_printf(seq, | |
1531 | " + Cannot retrieve VLAN %d for originator %pM\n", | |
1532 | BATADV_PRINT_VID(tt_common_entry->vid), | |
1533 | orig_entry->orig_node->orig); | |
1534 | continue; | |
1535 | } | |
1536 | ||
db08e6e5 | 1537 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
16052789 | 1538 | seq_printf(seq, |
dd24ddb2 | 1539 | " %c %pM %4d (%3u) via %pM (%3u) (%#.8x) [%c%c%c%c]\n", |
981d8900 | 1540 | '+', tt_global_entry->common.addr, |
16052789 | 1541 | BATADV_PRINT_VID(tt_global_entry->common.vid), |
981d8900 | 1542 | orig_entry->ttvn, orig_entry->orig_node->orig, |
7ea7b4a1 | 1543 | last_ttvn, vlan->tt.crc, |
acd34afa | 1544 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b | 1545 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
dd24ddb2 | 1546 | (flags & BATADV_TT_CLIENT_ISOLA ? 'I' : '.'), |
30cfd02b | 1547 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); |
7ea7b4a1 AQ |
1548 | |
1549 | batadv_orig_node_vlan_free_ref(vlan); | |
db08e6e5 SW |
1550 | } |
1551 | } | |
1552 | ||
08c36d3e | 1553 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1554 | { |
1555 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1556 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1557 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1558 | struct batadv_tt_common_entry *tt_common_entry; |
1559 | struct batadv_tt_global_entry *tt_global; | |
1560 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1561 | struct hlist_head *head; |
c90681b8 | 1562 | uint32_t i; |
c6c8fea2 | 1563 | |
30da63a6 ML |
1564 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1565 | if (!primary_if) | |
32ae9b22 | 1566 | goto out; |
c6c8fea2 | 1567 | |
2dafb49d AQ |
1568 | seq_printf(seq, |
1569 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1570 | net_dev->name); |
16052789 AQ |
1571 | seq_printf(seq, " %-13s %s %s %-15s %s (%-10s) %s\n", |
1572 | "Client", "VID", "(TTVN)", "Originator", "(Curr TTVN)", | |
1573 | "CRC", "Flags"); | |
c6c8fea2 | 1574 | |
c6c8fea2 SE |
1575 | for (i = 0; i < hash->size; i++) { |
1576 | head = &hash->table[i]; | |
1577 | ||
7aadf889 | 1578 | rcu_read_lock(); |
b67bfe0d | 1579 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1580 | head, hash_entry) { |
56303d34 SE |
1581 | tt_global = container_of(tt_common_entry, |
1582 | struct batadv_tt_global_entry, | |
1583 | common); | |
4627456a | 1584 | batadv_tt_global_print_entry(bat_priv, tt_global, seq); |
c6c8fea2 | 1585 | } |
7aadf889 | 1586 | rcu_read_unlock(); |
c6c8fea2 | 1587 | } |
32ae9b22 ML |
1588 | out: |
1589 | if (primary_if) | |
e5d89254 | 1590 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1591 | return 0; |
c6c8fea2 SE |
1592 | } |
1593 | ||
1d8ab8d3 LL |
1594 | /** |
1595 | * batadv_tt_global_del_orig_entry - remove and free an orig_entry | |
1596 | * @tt_global_entry: the global entry to remove the orig_entry from | |
1597 | * @orig_entry: the orig entry to remove and free | |
1598 | * | |
1599 | * Remove an orig_entry from its list in the given tt_global_entry and | |
1600 | * free this orig_entry afterwards. | |
1601 | */ | |
1602 | static void | |
1603 | batadv_tt_global_del_orig_entry(struct batadv_tt_global_entry *tt_global_entry, | |
1604 | struct batadv_tt_orig_list_entry *orig_entry) | |
1605 | { | |
1606 | batadv_tt_global_size_dec(orig_entry->orig_node, | |
1607 | tt_global_entry->common.vid); | |
1608 | atomic_dec(&tt_global_entry->orig_list_count); | |
1609 | hlist_del_rcu(&orig_entry->list); | |
1610 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
1611 | } | |
1612 | ||
db08e6e5 | 1613 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1614 | static void |
56303d34 | 1615 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1616 | { |
db08e6e5 | 1617 | struct hlist_head *head; |
b67bfe0d | 1618 | struct hlist_node *safe; |
56303d34 | 1619 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1620 | |
db08e6e5 SW |
1621 | spin_lock_bh(&tt_global_entry->list_lock); |
1622 | head = &tt_global_entry->orig_list; | |
1d8ab8d3 LL |
1623 | hlist_for_each_entry_safe(orig_entry, safe, head, list) |
1624 | batadv_tt_global_del_orig_entry(tt_global_entry, orig_entry); | |
db08e6e5 | 1625 | spin_unlock_bh(&tt_global_entry->list_lock); |
db08e6e5 SW |
1626 | } |
1627 | ||
1d8ab8d3 LL |
1628 | /** |
1629 | * batadv_tt_global_del_orig_node - remove orig_node from a global tt entry | |
1630 | * @bat_priv: the bat priv with all the soft interface information | |
1631 | * @tt_global_entry: the global entry to remove the orig_node from | |
1632 | * @orig_node: the originator announcing the client | |
1633 | * @message: message to append to the log on deletion | |
1634 | * | |
1635 | * Remove the given orig_node and its according orig_entry from the given | |
1636 | * global tt entry. | |
1637 | */ | |
a513088d | 1638 | static void |
1d8ab8d3 LL |
1639 | batadv_tt_global_del_orig_node(struct batadv_priv *bat_priv, |
1640 | struct batadv_tt_global_entry *tt_global_entry, | |
1641 | struct batadv_orig_node *orig_node, | |
1642 | const char *message) | |
db08e6e5 SW |
1643 | { |
1644 | struct hlist_head *head; | |
b67bfe0d | 1645 | struct hlist_node *safe; |
56303d34 | 1646 | struct batadv_tt_orig_list_entry *orig_entry; |
16052789 | 1647 | unsigned short vid; |
db08e6e5 SW |
1648 | |
1649 | spin_lock_bh(&tt_global_entry->list_lock); | |
1650 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1651 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1652 | if (orig_entry->orig_node == orig_node) { |
16052789 | 1653 | vid = tt_global_entry->common.vid; |
39c75a51 | 1654 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 | 1655 | "Deleting %pM from global tt entry %pM (vid: %d): %s\n", |
1eda58bf | 1656 | orig_node->orig, |
16052789 AQ |
1657 | tt_global_entry->common.addr, |
1658 | BATADV_PRINT_VID(vid), message); | |
1d8ab8d3 LL |
1659 | batadv_tt_global_del_orig_entry(tt_global_entry, |
1660 | orig_entry); | |
db08e6e5 SW |
1661 | } |
1662 | } | |
1663 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1664 | } | |
1665 | ||
db08e6e5 | 1666 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1667 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1668 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1669 | */ |
a513088d | 1670 | static void |
56303d34 SE |
1671 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1672 | struct batadv_tt_global_entry *tt_global_entry, | |
1673 | struct batadv_orig_node *orig_node, | |
1674 | const char *message) | |
db08e6e5 SW |
1675 | { |
1676 | bool last_entry = true; | |
1677 | struct hlist_head *head; | |
56303d34 | 1678 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1679 | |
1680 | /* no local entry exists, case 1: | |
1681 | * Check if this is the last one or if other entries exist. | |
1682 | */ | |
1683 | ||
1684 | rcu_read_lock(); | |
1685 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1686 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1687 | if (orig_entry->orig_node != orig_node) { |
1688 | last_entry = false; | |
1689 | break; | |
1690 | } | |
1691 | } | |
1692 | rcu_read_unlock(); | |
1693 | ||
1694 | if (last_entry) { | |
1695 | /* its the last one, mark for roaming. */ | |
acd34afa | 1696 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1697 | tt_global_entry->roam_at = jiffies; |
1698 | } else | |
1699 | /* there is another entry, we can simply delete this | |
1700 | * one and can still use the other one. | |
1701 | */ | |
1d8ab8d3 LL |
1702 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1703 | orig_node, message); | |
db08e6e5 SW |
1704 | } |
1705 | ||
c018ad3d AQ |
1706 | /** |
1707 | * batadv_tt_global_del - remove a client from the global table | |
1708 | * @bat_priv: the bat priv with all the soft interface information | |
1709 | * @orig_node: an originator serving this client | |
1710 | * @addr: the mac address of the client | |
1711 | * @vid: VLAN identifier | |
1712 | * @message: a message explaining the reason for deleting the client to print | |
1713 | * for debugging purpose | |
1714 | * @roaming: true if the deletion has been triggered by a roaming event | |
1715 | */ | |
56303d34 SE |
1716 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1717 | struct batadv_orig_node *orig_node, | |
c018ad3d | 1718 | const unsigned char *addr, unsigned short vid, |
a513088d | 1719 | const char *message, bool roaming) |
a73105b8 | 1720 | { |
170173bf | 1721 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1722 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1723 | |
c018ad3d | 1724 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
db08e6e5 | 1725 | if (!tt_global_entry) |
7683fdc1 | 1726 | goto out; |
a73105b8 | 1727 | |
db08e6e5 | 1728 | if (!roaming) { |
1d8ab8d3 LL |
1729 | batadv_tt_global_del_orig_node(bat_priv, tt_global_entry, |
1730 | orig_node, message); | |
db08e6e5 SW |
1731 | |
1732 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1733 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1734 | message); | |
db08e6e5 SW |
1735 | |
1736 | goto out; | |
1737 | } | |
92f90f56 SE |
1738 | |
1739 | /* if we are deleting a global entry due to a roam | |
1740 | * event, there are two possibilities: | |
db08e6e5 SW |
1741 | * 1) the client roamed from node A to node B => if there |
1742 | * is only one originator left for this client, we mark | |
acd34afa | 1743 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1744 | * wait for node B to claim it. In case of timeout |
1745 | * the entry is purged. | |
db08e6e5 SW |
1746 | * |
1747 | * If there are other originators left, we directly delete | |
1748 | * the originator. | |
92f90f56 | 1749 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1750 | * the global entry, since it is useless now. |
1751 | */ | |
a513088d | 1752 | local_entry = batadv_tt_local_hash_find(bat_priv, |
c018ad3d AQ |
1753 | tt_global_entry->common.addr, |
1754 | vid); | |
a513088d | 1755 | if (local_entry) { |
db08e6e5 | 1756 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1757 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1758 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1759 | } else |
1760 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1761 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1762 | orig_node, message); | |
92f90f56 | 1763 | |
92f90f56 | 1764 | |
cc47f66e | 1765 | out: |
7683fdc1 | 1766 | if (tt_global_entry) |
a513088d SE |
1767 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1768 | if (local_entry) | |
1769 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1770 | } |
1771 | ||
95fb130d AQ |
1772 | /** |
1773 | * batadv_tt_global_del_orig - remove all the TT global entries belonging to the | |
1774 | * given originator matching the provided vid | |
1775 | * @bat_priv: the bat priv with all the soft interface information | |
1776 | * @orig_node: the originator owning the entries to remove | |
1777 | * @match_vid: the VLAN identifier to match. If negative all the entries will be | |
1778 | * removed | |
1779 | * @message: debug message to print as "reason" | |
1780 | */ | |
56303d34 SE |
1781 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1782 | struct batadv_orig_node *orig_node, | |
95fb130d | 1783 | int32_t match_vid, |
56303d34 | 1784 | const char *message) |
c6c8fea2 | 1785 | { |
56303d34 SE |
1786 | struct batadv_tt_global_entry *tt_global; |
1787 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1788 | uint32_t i; |
807736f6 | 1789 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1790 | struct hlist_node *safe; |
a73105b8 | 1791 | struct hlist_head *head; |
7683fdc1 | 1792 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
16052789 | 1793 | unsigned short vid; |
c6c8fea2 | 1794 | |
6e801494 SW |
1795 | if (!hash) |
1796 | return; | |
1797 | ||
a73105b8 AQ |
1798 | for (i = 0; i < hash->size; i++) { |
1799 | head = &hash->table[i]; | |
7683fdc1 | 1800 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1801 | |
7683fdc1 | 1802 | spin_lock_bh(list_lock); |
b67bfe0d | 1803 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1804 | head, hash_entry) { |
95fb130d AQ |
1805 | /* remove only matching entries */ |
1806 | if (match_vid >= 0 && tt_common_entry->vid != match_vid) | |
1807 | continue; | |
1808 | ||
56303d34 SE |
1809 | tt_global = container_of(tt_common_entry, |
1810 | struct batadv_tt_global_entry, | |
1811 | common); | |
db08e6e5 | 1812 | |
1d8ab8d3 LL |
1813 | batadv_tt_global_del_orig_node(bat_priv, tt_global, |
1814 | orig_node, message); | |
db08e6e5 | 1815 | |
56303d34 | 1816 | if (hlist_empty(&tt_global->orig_list)) { |
16052789 | 1817 | vid = tt_global->common.vid; |
39c75a51 | 1818 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
1819 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1820 | tt_global->common.addr, | |
1821 | BATADV_PRINT_VID(vid), message); | |
b67bfe0d | 1822 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1823 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1824 | } |
a73105b8 | 1825 | } |
7683fdc1 | 1826 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1827 | } |
e17931d1 | 1828 | orig_node->capa_initialized &= ~BATADV_ORIG_CAPA_HAS_TT; |
c6c8fea2 SE |
1829 | } |
1830 | ||
30cfd02b AQ |
1831 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1832 | char **msg) | |
cc47f66e | 1833 | { |
30cfd02b AQ |
1834 | bool purge = false; |
1835 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1836 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1837 | |
30cfd02b AQ |
1838 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1839 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1840 | purge = true; | |
1841 | *msg = "Roaming timeout\n"; | |
1842 | } | |
42d0b044 | 1843 | |
30cfd02b AQ |
1844 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1845 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1846 | purge = true; | |
1847 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1848 | } |
30cfd02b AQ |
1849 | |
1850 | return purge; | |
42d0b044 SE |
1851 | } |
1852 | ||
30cfd02b | 1853 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1854 | { |
807736f6 | 1855 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1856 | struct hlist_head *head; |
b67bfe0d | 1857 | struct hlist_node *node_tmp; |
7683fdc1 | 1858 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1859 | uint32_t i; |
30cfd02b AQ |
1860 | char *msg = NULL; |
1861 | struct batadv_tt_common_entry *tt_common; | |
1862 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1863 | |
cc47f66e AQ |
1864 | for (i = 0; i < hash->size; i++) { |
1865 | head = &hash->table[i]; | |
7683fdc1 | 1866 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1867 | |
7683fdc1 | 1868 | spin_lock_bh(list_lock); |
b67bfe0d | 1869 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1870 | hash_entry) { |
1871 | tt_global = container_of(tt_common, | |
1872 | struct batadv_tt_global_entry, | |
1873 | common); | |
1874 | ||
1875 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1876 | continue; | |
1877 | ||
1878 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
1879 | "Deleting global tt entry %pM (vid: %d): %s\n", |
1880 | tt_global->common.addr, | |
1881 | BATADV_PRINT_VID(tt_global->common.vid), | |
1882 | msg); | |
30cfd02b | 1883 | |
b67bfe0d | 1884 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1885 | |
1886 | batadv_tt_global_entry_free_ref(tt_global); | |
1887 | } | |
7683fdc1 | 1888 | spin_unlock_bh(list_lock); |
cc47f66e | 1889 | } |
cc47f66e AQ |
1890 | } |
1891 | ||
56303d34 | 1892 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1893 | { |
5bf74e9c | 1894 | struct batadv_hashtable *hash; |
7683fdc1 | 1895 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1896 | struct batadv_tt_common_entry *tt_common_entry; |
1897 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1898 | struct hlist_node *node_tmp; |
7683fdc1 | 1899 | struct hlist_head *head; |
c90681b8 | 1900 | uint32_t i; |
7683fdc1 | 1901 | |
807736f6 | 1902 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1903 | return; |
1904 | ||
807736f6 | 1905 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1906 | |
1907 | for (i = 0; i < hash->size; i++) { | |
1908 | head = &hash->table[i]; | |
1909 | list_lock = &hash->list_locks[i]; | |
1910 | ||
1911 | spin_lock_bh(list_lock); | |
b67bfe0d | 1912 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1913 | head, hash_entry) { |
b67bfe0d | 1914 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1915 | tt_global = container_of(tt_common_entry, |
1916 | struct batadv_tt_global_entry, | |
1917 | common); | |
1918 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1919 | } |
1920 | spin_unlock_bh(list_lock); | |
1921 | } | |
1922 | ||
1a8eaf07 | 1923 | batadv_hash_destroy(hash); |
7683fdc1 | 1924 | |
807736f6 | 1925 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1926 | } |
1927 | ||
56303d34 SE |
1928 | static bool |
1929 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1930 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1931 | { |
1932 | bool ret = false; | |
1933 | ||
acd34afa SE |
1934 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1935 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1936 | ret = true; |
1937 | ||
2d2fcc2a AQ |
1938 | /* check if the two clients are marked as isolated */ |
1939 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_ISOLA && | |
1940 | tt_global_entry->common.flags & BATADV_TT_CLIENT_ISOLA) | |
1941 | ret = true; | |
1942 | ||
59b699cd AQ |
1943 | return ret; |
1944 | } | |
1945 | ||
c018ad3d AQ |
1946 | /** |
1947 | * batadv_transtable_search - get the mesh destination for a given client | |
1948 | * @bat_priv: the bat priv with all the soft interface information | |
1949 | * @src: mac address of the source client | |
1950 | * @addr: mac address of the destination client | |
1951 | * @vid: VLAN identifier | |
1952 | * | |
1953 | * Returns a pointer to the originator that was selected as destination in the | |
1954 | * mesh for contacting the client 'addr', NULL otherwise. | |
1955 | * In case of multiple originators serving the same client, the function returns | |
1956 | * the best one (best in terms of metric towards the destination node). | |
1957 | * | |
1958 | * If the two clients are AP isolated the function returns NULL. | |
1959 | */ | |
56303d34 SE |
1960 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1961 | const uint8_t *src, | |
c018ad3d AQ |
1962 | const uint8_t *addr, |
1963 | unsigned short vid) | |
c6c8fea2 | 1964 | { |
56303d34 SE |
1965 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1966 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1967 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1968 | struct batadv_tt_orig_list_entry *best_entry; |
b8cbd81d | 1969 | |
eceb22ae | 1970 | if (src && batadv_vlan_ap_isola_get(bat_priv, vid)) { |
c018ad3d | 1971 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src, vid); |
068ee6e2 AQ |
1972 | if (!tt_local_entry || |
1973 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1974 | goto out; |
1975 | } | |
7aadf889 | 1976 | |
c018ad3d | 1977 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
2dafb49d | 1978 | if (!tt_global_entry) |
7b36e8ee | 1979 | goto out; |
7aadf889 | 1980 | |
3d393e47 | 1981 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1982 | * isolation |
1983 | */ | |
a513088d SE |
1984 | if (tt_local_entry && |
1985 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1986 | goto out; |
1987 | ||
db08e6e5 | 1988 | rcu_read_lock(); |
4627456a | 1989 | best_entry = batadv_transtable_best_orig(bat_priv, tt_global_entry); |
db08e6e5 | 1990 | /* found anything? */ |
981d8900 SE |
1991 | if (best_entry) |
1992 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1993 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1994 | orig_node = NULL; | |
1995 | rcu_read_unlock(); | |
981d8900 | 1996 | |
7b36e8ee | 1997 | out: |
3d393e47 | 1998 | if (tt_global_entry) |
a513088d | 1999 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 2000 | if (tt_local_entry) |
a513088d | 2001 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 2002 | |
7b36e8ee | 2003 | return orig_node; |
c6c8fea2 | 2004 | } |
a73105b8 | 2005 | |
ced72933 AQ |
2006 | /** |
2007 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
2008 | * to the given orig_node | |
2009 | * @bat_priv: the bat priv with all the soft interface information | |
0ffa9e8d | 2010 | * @orig_node: originator for which the CRC should be computed |
7ea7b4a1 | 2011 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2012 | * |
2013 | * This function computes the checksum for the global table corresponding to a | |
2014 | * specific originator. In particular, the checksum is computed as follows: For | |
2015 | * each client connected to the originator the CRC32C of the MAC address and the | |
2016 | * VID is computed and then all the CRC32Cs of the various clients are xor'ed | |
2017 | * together. | |
2018 | * | |
2019 | * The idea behind is that CRC32C should be used as much as possible in order to | |
2020 | * produce a unique hash of the table, but since the order which is used to feed | |
2021 | * the CRC32C function affects the result and since every node in the network | |
2022 | * probably sorts the clients differently, the hash function cannot be directly | |
2023 | * computed over the entire table. Hence the CRC32C is used only on | |
2024 | * the single client entry, while all the results are then xor'ed together | |
2025 | * because the XOR operation can combine them all while trying to reduce the | |
2026 | * noise as much as possible. | |
2027 | * | |
2028 | * Returns the checksum of the global table of a given originator. | |
ced72933 AQ |
2029 | */ |
2030 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
7ea7b4a1 AQ |
2031 | struct batadv_orig_node *orig_node, |
2032 | unsigned short vid) | |
a73105b8 | 2033 | { |
807736f6 | 2034 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
2035 | struct batadv_tt_common_entry *tt_common; |
2036 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 2037 | struct hlist_head *head; |
0ffa9e8d | 2038 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2039 | uint8_t flags; |
a30e22ca | 2040 | __be16 tmp_vid; |
a73105b8 AQ |
2041 | |
2042 | for (i = 0; i < hash->size; i++) { | |
2043 | head = &hash->table[i]; | |
2044 | ||
2045 | rcu_read_lock(); | |
b67bfe0d | 2046 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
2047 | tt_global = container_of(tt_common, |
2048 | struct batadv_tt_global_entry, | |
2049 | common); | |
7ea7b4a1 AQ |
2050 | /* compute the CRC only for entries belonging to the |
2051 | * VLAN identified by the vid passed as parameter | |
2052 | */ | |
2053 | if (tt_common->vid != vid) | |
2054 | continue; | |
2055 | ||
db08e6e5 SW |
2056 | /* Roaming clients are in the global table for |
2057 | * consistency only. They don't have to be | |
2058 | * taken into account while computing the | |
2059 | * global crc | |
2060 | */ | |
acd34afa | 2061 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 2062 | continue; |
30cfd02b AQ |
2063 | /* Temporary clients have not been announced yet, so |
2064 | * they have to be skipped while computing the global | |
2065 | * crc | |
2066 | */ | |
2067 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
2068 | continue; | |
db08e6e5 SW |
2069 | |
2070 | /* find out if this global entry is announced by this | |
2071 | * originator | |
2072 | */ | |
56303d34 | 2073 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 2074 | orig_node)) |
db08e6e5 SW |
2075 | continue; |
2076 | ||
a30e22ca AQ |
2077 | /* use network order to read the VID: this ensures that |
2078 | * every node reads the bytes in the same order. | |
2079 | */ | |
2080 | tmp_vid = htons(tt_common->vid); | |
2081 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2082 | |
2083 | /* compute the CRC on flags that have to be kept in sync | |
2084 | * among nodes | |
2085 | */ | |
2086 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2087 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2088 | ||
0ffa9e8d | 2089 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
2090 | } |
2091 | rcu_read_unlock(); | |
2092 | } | |
2093 | ||
ced72933 | 2094 | return crc; |
a73105b8 AQ |
2095 | } |
2096 | ||
ced72933 AQ |
2097 | /** |
2098 | * batadv_tt_local_crc - calculates the checksum of the local table | |
2099 | * @bat_priv: the bat priv with all the soft interface information | |
7ea7b4a1 | 2100 | * @vid: VLAN identifier for which the CRC32 has to be computed |
0ffa9e8d AQ |
2101 | * |
2102 | * For details about the computation, please refer to the documentation for | |
2103 | * batadv_tt_global_crc(). | |
2104 | * | |
2105 | * Returns the checksum of the local table | |
ced72933 | 2106 | */ |
7ea7b4a1 AQ |
2107 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv, |
2108 | unsigned short vid) | |
a73105b8 | 2109 | { |
807736f6 | 2110 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 2111 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 2112 | struct hlist_head *head; |
0ffa9e8d | 2113 | uint32_t i, crc_tmp, crc = 0; |
0eb01568 | 2114 | uint8_t flags; |
a30e22ca | 2115 | __be16 tmp_vid; |
a73105b8 AQ |
2116 | |
2117 | for (i = 0; i < hash->size; i++) { | |
2118 | head = &hash->table[i]; | |
2119 | ||
2120 | rcu_read_lock(); | |
b67bfe0d | 2121 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
7ea7b4a1 AQ |
2122 | /* compute the CRC only for entries belonging to the |
2123 | * VLAN identified by vid | |
2124 | */ | |
2125 | if (tt_common->vid != vid) | |
2126 | continue; | |
2127 | ||
058d0e26 | 2128 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
2129 | * account while computing the CRC |
2130 | */ | |
acd34afa | 2131 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 2132 | continue; |
ced72933 | 2133 | |
a30e22ca AQ |
2134 | /* use network order to read the VID: this ensures that |
2135 | * every node reads the bytes in the same order. | |
2136 | */ | |
2137 | tmp_vid = htons(tt_common->vid); | |
2138 | crc_tmp = crc32c(0, &tmp_vid, sizeof(tmp_vid)); | |
0eb01568 AQ |
2139 | |
2140 | /* compute the CRC on flags that have to be kept in sync | |
2141 | * among nodes | |
2142 | */ | |
2143 | flags = tt_common->flags & BATADV_TT_SYNC_MASK; | |
2144 | crc_tmp = crc32c(crc_tmp, &flags, sizeof(flags)); | |
2145 | ||
0ffa9e8d | 2146 | crc ^= crc32c(crc_tmp, tt_common->addr, ETH_ALEN); |
a73105b8 | 2147 | } |
a73105b8 AQ |
2148 | rcu_read_unlock(); |
2149 | } | |
2150 | ||
ced72933 | 2151 | return crc; |
a73105b8 AQ |
2152 | } |
2153 | ||
56303d34 | 2154 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2155 | { |
56303d34 | 2156 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2157 | |
807736f6 | 2158 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2159 | |
807736f6 | 2160 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
2161 | list_del(&node->list); |
2162 | kfree(node); | |
2163 | } | |
2164 | ||
807736f6 | 2165 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2166 | } |
2167 | ||
56303d34 SE |
2168 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
2169 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
2170 | const void *tt_buff, |
2171 | uint16_t tt_buff_len) | |
a73105b8 | 2172 | { |
a73105b8 | 2173 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
2174 | * last OGM (the OGM could carry no changes) |
2175 | */ | |
a73105b8 AQ |
2176 | spin_lock_bh(&orig_node->tt_buff_lock); |
2177 | if (tt_buff_len > 0) { | |
2178 | kfree(orig_node->tt_buff); | |
2179 | orig_node->tt_buff_len = 0; | |
2180 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
2181 | if (orig_node->tt_buff) { | |
2182 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
2183 | orig_node->tt_buff_len = tt_buff_len; | |
2184 | } | |
2185 | } | |
2186 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2187 | } | |
2188 | ||
56303d34 | 2189 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 2190 | { |
56303d34 | 2191 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 2192 | |
807736f6 SE |
2193 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2194 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
2195 | if (batadv_has_timed_out(node->issued_at, |
2196 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
2197 | list_del(&node->list); |
2198 | kfree(node); | |
2199 | } | |
2200 | } | |
807736f6 | 2201 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2202 | } |
2203 | ||
2204 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
2205 | * has already been issued for this orig_node, NULL otherwise |
2206 | */ | |
56303d34 SE |
2207 | static struct batadv_tt_req_node * |
2208 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
2209 | struct batadv_orig_node *orig_node) | |
a73105b8 | 2210 | { |
56303d34 | 2211 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 2212 | |
807736f6 SE |
2213 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2214 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
2215 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
2216 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 2217 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
2218 | goto unlock; |
2219 | } | |
2220 | ||
2221 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
2222 | if (!tt_req_node) | |
2223 | goto unlock; | |
2224 | ||
8fdd0153 | 2225 | ether_addr_copy(tt_req_node->addr, orig_node->orig); |
a73105b8 AQ |
2226 | tt_req_node->issued_at = jiffies; |
2227 | ||
807736f6 | 2228 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 2229 | unlock: |
807736f6 | 2230 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2231 | return tt_req_node; |
2232 | } | |
2233 | ||
335fbe0f ML |
2234 | /** |
2235 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
2236 | * @entry_ptr: to be checked local tt entry | |
2237 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
2238 | * | |
2239 | * Returns 1 if the entry is a valid, 0 otherwise. | |
2240 | */ | |
2241 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 2242 | { |
56303d34 | 2243 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 2244 | |
acd34afa | 2245 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
2246 | return 0; |
2247 | return 1; | |
2248 | } | |
2249 | ||
a513088d SE |
2250 | static int batadv_tt_global_valid(const void *entry_ptr, |
2251 | const void *data_ptr) | |
a73105b8 | 2252 | { |
56303d34 SE |
2253 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
2254 | const struct batadv_tt_global_entry *tt_global_entry; | |
2255 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 2256 | |
30cfd02b AQ |
2257 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
2258 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
2259 | return 0; |
2260 | ||
56303d34 SE |
2261 | tt_global_entry = container_of(tt_common_entry, |
2262 | struct batadv_tt_global_entry, | |
48100bac AQ |
2263 | common); |
2264 | ||
a513088d | 2265 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
2266 | } |
2267 | ||
335fbe0f | 2268 | /** |
7ea7b4a1 AQ |
2269 | * batadv_tt_tvlv_generate - fill the tvlv buff with the tt entries from the |
2270 | * specified tt hash | |
335fbe0f ML |
2271 | * @bat_priv: the bat priv with all the soft interface information |
2272 | * @hash: hash table containing the tt entries | |
2273 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
7ea7b4a1 | 2274 | * @tvlv_buff: pointer to the buffer to fill with the TT data |
335fbe0f ML |
2275 | * @valid_cb: function to filter tt change entries |
2276 | * @cb_data: data passed to the filter function as argument | |
335fbe0f | 2277 | */ |
7ea7b4a1 AQ |
2278 | static void batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, |
2279 | struct batadv_hashtable *hash, | |
2280 | void *tvlv_buff, uint16_t tt_len, | |
2281 | int (*valid_cb)(const void *, const void *), | |
2282 | void *cb_data) | |
a73105b8 | 2283 | { |
56303d34 | 2284 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f | 2285 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2286 | struct hlist_head *head; |
335fbe0f | 2287 | uint16_t tt_tot, tt_num_entries = 0; |
c90681b8 | 2288 | uint32_t i; |
a73105b8 | 2289 | |
298e6e68 | 2290 | tt_tot = batadv_tt_entries(tt_len); |
7ea7b4a1 | 2291 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_buff; |
a73105b8 AQ |
2292 | |
2293 | rcu_read_lock(); | |
2294 | for (i = 0; i < hash->size; i++) { | |
2295 | head = &hash->table[i]; | |
2296 | ||
b67bfe0d | 2297 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 2298 | head, hash_entry) { |
335fbe0f | 2299 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
2300 | break; |
2301 | ||
48100bac | 2302 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
2303 | continue; |
2304 | ||
8fdd0153 | 2305 | ether_addr_copy(tt_change->addr, tt_common_entry->addr); |
27b37ebf | 2306 | tt_change->flags = tt_common_entry->flags; |
c018ad3d | 2307 | tt_change->vid = htons(tt_common_entry->vid); |
ca663046 AQ |
2308 | memset(tt_change->reserved, 0, |
2309 | sizeof(tt_change->reserved)); | |
a73105b8 | 2310 | |
335fbe0f | 2311 | tt_num_entries++; |
a73105b8 AQ |
2312 | tt_change++; |
2313 | } | |
2314 | } | |
2315 | rcu_read_unlock(); | |
7ea7b4a1 | 2316 | } |
a73105b8 | 2317 | |
7ea7b4a1 AQ |
2318 | /** |
2319 | * batadv_tt_global_check_crc - check if all the CRCs are correct | |
2320 | * @orig_node: originator for which the CRCs have to be checked | |
2321 | * @tt_vlan: pointer to the first tvlv VLAN entry | |
2322 | * @num_vlan: number of tvlv VLAN entries | |
2323 | * @create: if true, create VLAN objects if not found | |
2324 | * | |
2325 | * Return true if all the received CRCs match the locally stored ones, false | |
2326 | * otherwise | |
2327 | */ | |
2328 | static bool batadv_tt_global_check_crc(struct batadv_orig_node *orig_node, | |
2329 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2330 | uint16_t num_vlan) | |
2331 | { | |
2332 | struct batadv_tvlv_tt_vlan_data *tt_vlan_tmp; | |
2333 | struct batadv_orig_node_vlan *vlan; | |
91c2b1a9 | 2334 | uint32_t crc; |
7ea7b4a1 AQ |
2335 | int i; |
2336 | ||
2337 | /* check if each received CRC matches the locally stored one */ | |
2338 | for (i = 0; i < num_vlan; i++) { | |
2339 | tt_vlan_tmp = tt_vlan + i; | |
2340 | ||
2341 | /* if orig_node is a backbone node for this VLAN, don't check | |
2342 | * the CRC as we ignore all the global entries over it | |
2343 | */ | |
2344 | if (batadv_bla_is_backbone_gw_orig(orig_node->bat_priv, | |
cfd4f757 AQ |
2345 | orig_node->orig, |
2346 | ntohs(tt_vlan_tmp->vid))) | |
7ea7b4a1 AQ |
2347 | continue; |
2348 | ||
2349 | vlan = batadv_orig_node_vlan_get(orig_node, | |
2350 | ntohs(tt_vlan_tmp->vid)); | |
2351 | if (!vlan) | |
2352 | return false; | |
2353 | ||
91c2b1a9 AQ |
2354 | crc = vlan->tt.crc; |
2355 | batadv_orig_node_vlan_free_ref(vlan); | |
2356 | ||
2357 | if (crc != ntohl(tt_vlan_tmp->crc)) | |
7ea7b4a1 AQ |
2358 | return false; |
2359 | } | |
2360 | ||
2361 | return true; | |
2362 | } | |
2363 | ||
2364 | /** | |
2365 | * batadv_tt_local_update_crc - update all the local CRCs | |
2366 | * @bat_priv: the bat priv with all the soft interface information | |
2367 | */ | |
2368 | static void batadv_tt_local_update_crc(struct batadv_priv *bat_priv) | |
2369 | { | |
2370 | struct batadv_softif_vlan *vlan; | |
2371 | ||
2372 | /* recompute the global CRC for each VLAN */ | |
2373 | rcu_read_lock(); | |
2374 | hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) { | |
2375 | vlan->tt.crc = batadv_tt_local_crc(bat_priv, vlan->vid); | |
2376 | } | |
2377 | rcu_read_unlock(); | |
2378 | } | |
2379 | ||
2380 | /** | |
2381 | * batadv_tt_global_update_crc - update all the global CRCs for this orig_node | |
2382 | * @bat_priv: the bat priv with all the soft interface information | |
2383 | * @orig_node: the orig_node for which the CRCs have to be updated | |
2384 | */ | |
2385 | static void batadv_tt_global_update_crc(struct batadv_priv *bat_priv, | |
2386 | struct batadv_orig_node *orig_node) | |
2387 | { | |
2388 | struct batadv_orig_node_vlan *vlan; | |
2389 | uint32_t crc; | |
2390 | ||
2391 | /* recompute the global CRC for each VLAN */ | |
2392 | rcu_read_lock(); | |
2393 | list_for_each_entry_rcu(vlan, &orig_node->vlan_list, list) { | |
2394 | /* if orig_node is a backbone node for this VLAN, don't compute | |
2395 | * the CRC as we ignore all the global entries over it | |
2396 | */ | |
cfd4f757 AQ |
2397 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, |
2398 | vlan->vid)) | |
7ea7b4a1 AQ |
2399 | continue; |
2400 | ||
2401 | crc = batadv_tt_global_crc(bat_priv, orig_node, vlan->vid); | |
2402 | vlan->tt.crc = crc; | |
2403 | } | |
2404 | rcu_read_unlock(); | |
a73105b8 AQ |
2405 | } |
2406 | ||
ced72933 AQ |
2407 | /** |
2408 | * batadv_send_tt_request - send a TT Request message to a given node | |
2409 | * @bat_priv: the bat priv with all the soft interface information | |
2410 | * @dst_orig_node: the destination of the message | |
2411 | * @ttvn: the version number that the source of the message is looking for | |
7ea7b4a1 AQ |
2412 | * @tt_vlan: pointer to the first tvlv VLAN object to request |
2413 | * @num_vlan: number of tvlv VLAN entries | |
ced72933 AQ |
2414 | * @full_table: ask for the entire translation table if true, while only for the |
2415 | * last TT diff otherwise | |
2416 | */ | |
56303d34 SE |
2417 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
2418 | struct batadv_orig_node *dst_orig_node, | |
7ea7b4a1 AQ |
2419 | uint8_t ttvn, |
2420 | struct batadv_tvlv_tt_vlan_data *tt_vlan, | |
2421 | uint16_t num_vlan, bool full_table) | |
a73105b8 | 2422 | { |
335fbe0f | 2423 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2424 | struct batadv_tt_req_node *tt_req_node = NULL; |
7ea7b4a1 AQ |
2425 | struct batadv_tvlv_tt_vlan_data *tt_vlan_req; |
2426 | struct batadv_hard_iface *primary_if; | |
335fbe0f | 2427 | bool ret = false; |
7ea7b4a1 | 2428 | int i, size; |
a73105b8 | 2429 | |
e5d89254 | 2430 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2431 | if (!primary_if) |
2432 | goto out; | |
2433 | ||
2434 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
2435 | * reply from the same orig_node yet |
2436 | */ | |
a513088d | 2437 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
2438 | if (!tt_req_node) |
2439 | goto out; | |
2440 | ||
7ea7b4a1 AQ |
2441 | size = sizeof(*tvlv_tt_data) + sizeof(*tt_vlan_req) * num_vlan; |
2442 | tvlv_tt_data = kzalloc(size, GFP_ATOMIC); | |
335fbe0f | 2443 | if (!tvlv_tt_data) |
a73105b8 AQ |
2444 | goto out; |
2445 | ||
335fbe0f ML |
2446 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
2447 | tvlv_tt_data->ttvn = ttvn; | |
7ea7b4a1 AQ |
2448 | tvlv_tt_data->num_vlan = htons(num_vlan); |
2449 | ||
2450 | /* send all the CRCs within the request. This is needed by intermediate | |
2451 | * nodes to ensure they have the correct table before replying | |
2452 | */ | |
2453 | tt_vlan_req = (struct batadv_tvlv_tt_vlan_data *)(tvlv_tt_data + 1); | |
2454 | for (i = 0; i < num_vlan; i++) { | |
2455 | tt_vlan_req->vid = tt_vlan->vid; | |
2456 | tt_vlan_req->crc = tt_vlan->crc; | |
2457 | ||
2458 | tt_vlan_req++; | |
2459 | tt_vlan++; | |
2460 | } | |
a73105b8 AQ |
2461 | |
2462 | if (full_table) | |
335fbe0f | 2463 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2464 | |
bb351ba0 | 2465 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 2466 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 2467 | |
d69909d2 | 2468 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
2469 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
2470 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
7ea7b4a1 | 2471 | tvlv_tt_data, size); |
335fbe0f | 2472 | ret = true; |
a73105b8 AQ |
2473 | |
2474 | out: | |
a73105b8 | 2475 | if (primary_if) |
e5d89254 | 2476 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 2477 | if (ret && tt_req_node) { |
807736f6 | 2478 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 2479 | list_del(&tt_req_node->list); |
807736f6 | 2480 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2481 | kfree(tt_req_node); |
2482 | } | |
335fbe0f | 2483 | kfree(tvlv_tt_data); |
a73105b8 AQ |
2484 | return ret; |
2485 | } | |
2486 | ||
335fbe0f ML |
2487 | /** |
2488 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
2489 | * node's translation table | |
2490 | * @bat_priv: the bat priv with all the soft interface information | |
2491 | * @tt_data: tt data containing the tt request information | |
2492 | * @req_src: mac address of tt request sender | |
2493 | * @req_dst: mac address of tt request recipient | |
2494 | * | |
2495 | * Returns true if tt request reply was sent, false otherwise. | |
2496 | */ | |
2497 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
2498 | struct batadv_tvlv_tt_data *tt_data, | |
2499 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2500 | { |
170173bf | 2501 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 2502 | struct batadv_orig_node *res_dst_orig_node = NULL; |
7ea7b4a1 | 2503 | struct batadv_tvlv_tt_change *tt_change; |
335fbe0f | 2504 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
7ea7b4a1 | 2505 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
335fbe0f | 2506 | bool ret = false, full_table; |
7ea7b4a1 AQ |
2507 | uint8_t orig_ttvn, req_ttvn; |
2508 | uint16_t tvlv_len; | |
2509 | int32_t tt_len; | |
a73105b8 | 2510 | |
39c75a51 | 2511 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2512 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
2513 | req_src, tt_data->ttvn, req_dst, |
2514 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
2515 | |
2516 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 2517 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
2518 | if (!req_dst_orig_node) |
2519 | goto out; | |
2520 | ||
335fbe0f | 2521 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2522 | if (!res_dst_orig_node) |
2523 | goto out; | |
2524 | ||
a73105b8 | 2525 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 2526 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2527 | |
7ea7b4a1 | 2528 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); |
335fbe0f | 2529 | /* this node doesn't have the requested data */ |
a73105b8 | 2530 | if (orig_ttvn != req_ttvn || |
7ea7b4a1 AQ |
2531 | !batadv_tt_global_check_crc(req_dst_orig_node, tt_vlan, |
2532 | ntohs(tt_data->num_vlan))) | |
a73105b8 AQ |
2533 | goto out; |
2534 | ||
015758d0 | 2535 | /* If the full table has been explicitly requested */ |
335fbe0f | 2536 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
2537 | !req_dst_orig_node->tt_buff) |
2538 | full_table = true; | |
2539 | else | |
2540 | full_table = false; | |
2541 | ||
335fbe0f ML |
2542 | /* TT fragmentation hasn't been implemented yet, so send as many |
2543 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2544 | */ |
a73105b8 AQ |
2545 | if (!full_table) { |
2546 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
2547 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 2548 | |
7ea7b4a1 AQ |
2549 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, |
2550 | &tvlv_tt_data, | |
2551 | &tt_change, | |
2552 | &tt_len); | |
2553 | if (!tt_len) | |
a73105b8 AQ |
2554 | goto unlock; |
2555 | ||
a73105b8 | 2556 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2557 | memcpy(tt_change, req_dst_orig_node->tt_buff, |
a73105b8 | 2558 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
2559 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
2560 | } else { | |
7ea7b4a1 AQ |
2561 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2562 | * in the initial part | |
2563 | */ | |
2564 | tt_len = -1; | |
2565 | tvlv_len = batadv_tt_prepare_tvlv_global_data(req_dst_orig_node, | |
2566 | &tvlv_tt_data, | |
2567 | &tt_change, | |
2568 | &tt_len); | |
2569 | if (!tt_len) | |
a73105b8 | 2570 | goto out; |
7ea7b4a1 AQ |
2571 | |
2572 | /* fill the rest of the tvlv with the real TT entries */ | |
2573 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.global_hash, | |
2574 | tt_change, tt_len, | |
2575 | batadv_tt_global_valid, | |
2576 | req_dst_orig_node); | |
a73105b8 AQ |
2577 | } |
2578 | ||
a19d3d85 ML |
2579 | /* Don't send the response, if larger than fragmented packet. */ |
2580 | tt_len = sizeof(struct batadv_unicast_tvlv_packet) + tvlv_len; | |
2581 | if (tt_len > atomic_read(&bat_priv->packet_size_max)) { | |
2582 | net_ratelimited_function(batadv_info, bat_priv->soft_iface, | |
2583 | "Ignoring TT_REQUEST from %pM; Response size exceeds max packet size.\n", | |
2584 | res_dst_orig_node->orig); | |
2585 | goto out; | |
2586 | } | |
2587 | ||
335fbe0f ML |
2588 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2589 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2590 | |
2591 | if (full_table) | |
335fbe0f | 2592 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2593 | |
39c75a51 | 2594 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2595 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
2596 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
2597 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2598 | |
d69909d2 | 2599 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2600 | |
335fbe0f | 2601 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
7ea7b4a1 AQ |
2602 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2603 | tvlv_len); | |
e91ecfc6 | 2604 | |
335fbe0f | 2605 | ret = true; |
a73105b8 AQ |
2606 | goto out; |
2607 | ||
2608 | unlock: | |
2609 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
2610 | ||
2611 | out: | |
2612 | if (res_dst_orig_node) | |
7d211efc | 2613 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 2614 | if (req_dst_orig_node) |
7d211efc | 2615 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 2616 | kfree(tvlv_tt_data); |
a73105b8 | 2617 | return ret; |
a73105b8 | 2618 | } |
96412690 | 2619 | |
335fbe0f ML |
2620 | /** |
2621 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
2622 | * translation table | |
2623 | * @bat_priv: the bat priv with all the soft interface information | |
2624 | * @tt_data: tt data containing the tt request information | |
2625 | * @req_src: mac address of tt request sender | |
2626 | * | |
2627 | * Returns true if tt request reply was sent, false otherwise. | |
2628 | */ | |
2629 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
2630 | struct batadv_tvlv_tt_data *tt_data, | |
2631 | uint8_t *req_src) | |
a73105b8 | 2632 | { |
335fbe0f | 2633 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 | 2634 | struct batadv_hard_iface *primary_if = NULL; |
7ea7b4a1 AQ |
2635 | struct batadv_tvlv_tt_change *tt_change; |
2636 | struct batadv_orig_node *orig_node; | |
335fbe0f | 2637 | uint8_t my_ttvn, req_ttvn; |
7ea7b4a1 | 2638 | uint16_t tvlv_len; |
a73105b8 | 2639 | bool full_table; |
7ea7b4a1 | 2640 | int32_t tt_len; |
a73105b8 | 2641 | |
39c75a51 | 2642 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2643 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
2644 | req_src, tt_data->ttvn, |
2645 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2646 | |
a70a9aa9 | 2647 | spin_lock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2648 | |
807736f6 | 2649 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 2650 | req_ttvn = tt_data->ttvn; |
a73105b8 | 2651 | |
335fbe0f | 2652 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
2653 | if (!orig_node) |
2654 | goto out; | |
2655 | ||
e5d89254 | 2656 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
2657 | if (!primary_if) |
2658 | goto out; | |
2659 | ||
2660 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
2661 | * is too big send the whole local translation table |
2662 | */ | |
335fbe0f | 2663 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 2664 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
2665 | full_table = true; |
2666 | else | |
2667 | full_table = false; | |
2668 | ||
335fbe0f ML |
2669 | /* TT fragmentation hasn't been implemented yet, so send as many |
2670 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 2671 | */ |
a73105b8 | 2672 | if (!full_table) { |
807736f6 | 2673 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2674 | |
7ea7b4a1 AQ |
2675 | tt_len = bat_priv->tt.last_changeset_len; |
2676 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2677 | &tvlv_tt_data, | |
2678 | &tt_change, | |
2679 | &tt_len); | |
2680 | if (!tt_len) | |
a73105b8 AQ |
2681 | goto unlock; |
2682 | ||
335fbe0f | 2683 | /* Copy the last orig_node's OGM buffer */ |
7ea7b4a1 | 2684 | memcpy(tt_change, bat_priv->tt.last_changeset, |
807736f6 SE |
2685 | bat_priv->tt.last_changeset_len); |
2686 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 2687 | } else { |
335fbe0f ML |
2688 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
2689 | ||
7ea7b4a1 AQ |
2690 | /* allocate the tvlv, put the tt_data and all the tt_vlan_data |
2691 | * in the initial part | |
2692 | */ | |
2693 | tt_len = -1; | |
2694 | tvlv_len = batadv_tt_prepare_tvlv_local_data(bat_priv, | |
2695 | &tvlv_tt_data, | |
2696 | &tt_change, | |
2697 | &tt_len); | |
2698 | if (!tt_len) | |
a73105b8 | 2699 | goto out; |
7ea7b4a1 AQ |
2700 | |
2701 | /* fill the rest of the tvlv with the real TT entries */ | |
2702 | batadv_tt_tvlv_generate(bat_priv, bat_priv->tt.local_hash, | |
2703 | tt_change, tt_len, | |
2704 | batadv_tt_local_valid, NULL); | |
a73105b8 AQ |
2705 | } |
2706 | ||
335fbe0f ML |
2707 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
2708 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
2709 | |
2710 | if (full_table) | |
335fbe0f | 2711 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 2712 | |
39c75a51 | 2713 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
2714 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
2715 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 2716 | |
d69909d2 | 2717 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 2718 | |
335fbe0f | 2719 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
7ea7b4a1 AQ |
2720 | req_src, BATADV_TVLV_TT, 1, tvlv_tt_data, |
2721 | tvlv_len); | |
335fbe0f | 2722 | |
a73105b8 AQ |
2723 | goto out; |
2724 | ||
2725 | unlock: | |
807736f6 | 2726 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 | 2727 | out: |
a70a9aa9 | 2728 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
a73105b8 | 2729 | if (orig_node) |
7d211efc | 2730 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 2731 | if (primary_if) |
e5d89254 | 2732 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
2733 | kfree(tvlv_tt_data); |
2734 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
2735 | return true; |
2736 | } | |
2737 | ||
335fbe0f ML |
2738 | /** |
2739 | * batadv_send_tt_response - send reply to tt request | |
2740 | * @bat_priv: the bat priv with all the soft interface information | |
2741 | * @tt_data: tt data containing the tt request information | |
2742 | * @req_src: mac address of tt request sender | |
2743 | * @req_dst: mac address of tt request recipient | |
2744 | * | |
2745 | * Returns true if tt request reply was sent, false otherwise. | |
2746 | */ | |
2747 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
2748 | struct batadv_tvlv_tt_data *tt_data, | |
2749 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 2750 | { |
cfd4f757 | 2751 | if (batadv_is_my_mac(bat_priv, req_dst)) |
335fbe0f | 2752 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
cfd4f757 | 2753 | else |
335fbe0f ML |
2754 | return batadv_send_other_tt_response(bat_priv, tt_data, |
2755 | req_src, req_dst); | |
a73105b8 AQ |
2756 | } |
2757 | ||
56303d34 SE |
2758 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2759 | struct batadv_orig_node *orig_node, | |
335fbe0f | 2760 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 2761 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
2762 | { |
2763 | int i; | |
a513088d | 2764 | int roams; |
a73105b8 AQ |
2765 | |
2766 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
2767 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
2768 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
2769 | batadv_tt_global_del(bat_priv, orig_node, |
2770 | (tt_change + i)->addr, | |
c018ad3d | 2771 | ntohs((tt_change + i)->vid), |
d4f44692 AQ |
2772 | "tt removed by changes", |
2773 | roams); | |
08c36d3e | 2774 | } else { |
08c36d3e | 2775 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 | 2776 | (tt_change + i)->addr, |
c018ad3d | 2777 | ntohs((tt_change + i)->vid), |
d4f44692 | 2778 | (tt_change + i)->flags, ttvn)) |
a73105b8 AQ |
2779 | /* In case of problem while storing a |
2780 | * global_entry, we stop the updating | |
2781 | * procedure without committing the | |
2782 | * ttvn change. This will avoid to send | |
2783 | * corrupted data on tt_request | |
2784 | */ | |
2785 | return; | |
08c36d3e | 2786 | } |
a73105b8 | 2787 | } |
e17931d1 | 2788 | orig_node->capa_initialized |= BATADV_ORIG_CAPA_HAS_TT; |
a73105b8 AQ |
2789 | } |
2790 | ||
56303d34 | 2791 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
7ea7b4a1 AQ |
2792 | struct batadv_tvlv_tt_change *tt_change, |
2793 | uint8_t ttvn, uint8_t *resp_src, | |
2794 | uint16_t num_entries) | |
a73105b8 | 2795 | { |
170173bf | 2796 | struct batadv_orig_node *orig_node; |
a73105b8 | 2797 | |
335fbe0f | 2798 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2799 | if (!orig_node) |
2800 | goto out; | |
2801 | ||
2802 | /* Purge the old table first.. */ | |
95fb130d AQ |
2803 | batadv_tt_global_del_orig(bat_priv, orig_node, -1, |
2804 | "Received full table"); | |
a73105b8 | 2805 | |
7ea7b4a1 AQ |
2806 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, num_entries, |
2807 | ttvn); | |
a73105b8 AQ |
2808 | |
2809 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2810 | kfree(orig_node->tt_buff); | |
2811 | orig_node->tt_buff_len = 0; | |
2812 | orig_node->tt_buff = NULL; | |
2813 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2814 | ||
7ea7b4a1 | 2815 | atomic_set(&orig_node->last_ttvn, ttvn); |
a73105b8 AQ |
2816 | |
2817 | out: | |
2818 | if (orig_node) | |
7d211efc | 2819 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2820 | } |
2821 | ||
56303d34 SE |
2822 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2823 | struct batadv_orig_node *orig_node, | |
a513088d | 2824 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2825 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2826 | { |
a513088d SE |
2827 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2828 | tt_num_changes, ttvn); | |
a73105b8 | 2829 | |
e8cf234a AQ |
2830 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2831 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2832 | atomic_set(&orig_node->last_ttvn, ttvn); |
2833 | } | |
2834 | ||
c018ad3d AQ |
2835 | /** |
2836 | * batadv_is_my_client - check if a client is served by the local node | |
2837 | * @bat_priv: the bat priv with all the soft interface information | |
2838 | * @addr: the mac adress of the client to check | |
2839 | * @vid: VLAN identifier | |
2840 | * | |
2841 | * Returns true if the client is served by this node, false otherwise. | |
2842 | */ | |
2843 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr, | |
2844 | unsigned short vid) | |
a73105b8 | 2845 | { |
170173bf | 2846 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2847 | bool ret = false; |
a73105b8 | 2848 | |
c018ad3d | 2849 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7683fdc1 AQ |
2850 | if (!tt_local_entry) |
2851 | goto out; | |
058d0e26 | 2852 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2853 | * consistency purpose) |
2854 | */ | |
7c1fd91d AQ |
2855 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2856 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2857 | goto out; |
7683fdc1 AQ |
2858 | ret = true; |
2859 | out: | |
a73105b8 | 2860 | if (tt_local_entry) |
a513088d | 2861 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2862 | return ret; |
a73105b8 AQ |
2863 | } |
2864 | ||
335fbe0f ML |
2865 | /** |
2866 | * batadv_handle_tt_response - process incoming tt reply | |
2867 | * @bat_priv: the bat priv with all the soft interface information | |
2868 | * @tt_data: tt data containing the tt request information | |
2869 | * @resp_src: mac address of tt reply sender | |
2870 | * @num_entries: number of tt change entries appended to the tt data | |
2871 | */ | |
2872 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2873 | struct batadv_tvlv_tt_data *tt_data, | |
2874 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2875 | { |
56303d34 SE |
2876 | struct batadv_tt_req_node *node, *safe; |
2877 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2878 | struct batadv_tvlv_tt_change *tt_change; |
7ea7b4a1 AQ |
2879 | uint8_t *tvlv_ptr = (uint8_t *)tt_data; |
2880 | uint16_t change_offset; | |
a73105b8 | 2881 | |
39c75a51 | 2882 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2883 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2884 | resp_src, tt_data->ttvn, num_entries, |
2885 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2886 | |
335fbe0f | 2887 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2888 | if (!orig_node) |
2889 | goto out; | |
2890 | ||
a70a9aa9 AQ |
2891 | spin_lock_bh(&orig_node->tt_lock); |
2892 | ||
7ea7b4a1 AQ |
2893 | change_offset = sizeof(struct batadv_tvlv_tt_vlan_data); |
2894 | change_offset *= ntohs(tt_data->num_vlan); | |
2895 | change_offset += sizeof(*tt_data); | |
2896 | tvlv_ptr += change_offset; | |
2897 | ||
2898 | tt_change = (struct batadv_tvlv_tt_change *)tvlv_ptr; | |
335fbe0f | 2899 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
7ea7b4a1 AQ |
2900 | batadv_tt_fill_gtable(bat_priv, tt_change, tt_data->ttvn, |
2901 | resp_src, num_entries); | |
96412690 | 2902 | } else { |
335fbe0f ML |
2903 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, |
2904 | tt_data->ttvn, tt_change); | |
96412690 | 2905 | } |
a73105b8 | 2906 | |
a70a9aa9 | 2907 | /* Recalculate the CRC for this orig_node and store it */ |
7ea7b4a1 | 2908 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a70a9aa9 AQ |
2909 | |
2910 | spin_unlock_bh(&orig_node->tt_lock); | |
2911 | ||
a73105b8 | 2912 | /* Delete the tt_req_node from pending tt_requests list */ |
807736f6 SE |
2913 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2914 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2915 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2916 | continue; |
2917 | list_del(&node->list); | |
2918 | kfree(node); | |
2919 | } | |
7ea7b4a1 | 2920 | |
807736f6 | 2921 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2922 | out: |
2923 | if (orig_node) | |
7d211efc | 2924 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2925 | } |
2926 | ||
56303d34 | 2927 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2928 | { |
56303d34 | 2929 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2930 | |
807736f6 | 2931 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2932 | |
807736f6 | 2933 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2934 | list_del(&node->list); |
2935 | kfree(node); | |
2936 | } | |
2937 | ||
807736f6 | 2938 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2939 | } |
2940 | ||
56303d34 | 2941 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2942 | { |
56303d34 | 2943 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2944 | |
807736f6 SE |
2945 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2946 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2947 | if (!batadv_has_timed_out(node->first_time, |
2948 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2949 | continue; |
2950 | ||
2951 | list_del(&node->list); | |
2952 | kfree(node); | |
2953 | } | |
807736f6 | 2954 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2955 | } |
2956 | ||
2957 | /* This function checks whether the client already reached the | |
2958 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2959 | * will not be sent. | |
2960 | * | |
9cfc7bd6 SE |
2961 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2962 | */ | |
56303d34 | 2963 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2964 | uint8_t *client) |
cc47f66e | 2965 | { |
56303d34 | 2966 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2967 | bool ret = false; |
2968 | ||
807736f6 | 2969 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2970 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2971 | * reply from the same orig_node yet |
2972 | */ | |
807736f6 | 2973 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2974 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2975 | continue; |
2976 | ||
1eda58bf | 2977 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2978 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2979 | continue; |
2980 | ||
3e34819e | 2981 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2982 | /* Sorry, you roamed too many times! */ |
2983 | goto unlock; | |
2984 | ret = true; | |
2985 | break; | |
2986 | } | |
2987 | ||
2988 | if (!ret) { | |
2989 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2990 | if (!tt_roam_node) | |
2991 | goto unlock; | |
2992 | ||
2993 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2994 | atomic_set(&tt_roam_node->counter, |
2995 | BATADV_ROAMING_MAX_COUNT - 1); | |
8fdd0153 | 2996 | ether_addr_copy(tt_roam_node->addr, client); |
cc47f66e | 2997 | |
807736f6 | 2998 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2999 | ret = true; |
3000 | } | |
3001 | ||
3002 | unlock: | |
807736f6 | 3003 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
3004 | return ret; |
3005 | } | |
3006 | ||
c018ad3d AQ |
3007 | /** |
3008 | * batadv_send_roam_adv - send a roaming advertisement message | |
3009 | * @bat_priv: the bat priv with all the soft interface information | |
3010 | * @client: mac address of the roaming client | |
3011 | * @vid: VLAN identifier | |
3012 | * @orig_node: message destination | |
3013 | * | |
3014 | * Send a ROAMING_ADV message to the node which was previously serving this | |
3015 | * client. This is done to inform the node that from now on all traffic destined | |
3016 | * for this particular roamed client has to be forwarded to the sender of the | |
3017 | * roaming message. | |
3018 | */ | |
56303d34 | 3019 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
c018ad3d | 3020 | unsigned short vid, |
56303d34 | 3021 | struct batadv_orig_node *orig_node) |
cc47f66e | 3022 | { |
56303d34 | 3023 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
3024 | struct batadv_tvlv_roam_adv tvlv_roam; |
3025 | ||
3026 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
3027 | if (!primary_if) | |
3028 | goto out; | |
cc47f66e AQ |
3029 | |
3030 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
3031 | * already roamed to us too many times |
3032 | */ | |
a513088d | 3033 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
3034 | goto out; |
3035 | ||
39c75a51 | 3036 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3037 | "Sending ROAMING_ADV to %pM (client %pM, vid: %d)\n", |
3038 | orig_node->orig, client, BATADV_PRINT_VID(vid)); | |
cc47f66e | 3039 | |
d69909d2 | 3040 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 3041 | |
122edaa0 | 3042 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
c018ad3d | 3043 | tvlv_roam.vid = htons(vid); |
122edaa0 ML |
3044 | |
3045 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
3046 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
3047 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
3048 | |
3049 | out: | |
122edaa0 ML |
3050 | if (primary_if) |
3051 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
3052 | } |
3053 | ||
a513088d | 3054 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 3055 | { |
56303d34 | 3056 | struct delayed_work *delayed_work; |
807736f6 | 3057 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
3058 | struct batadv_priv *bat_priv; |
3059 | ||
3060 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
3061 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
3062 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 3063 | |
a19d3d85 | 3064 | batadv_tt_local_purge(bat_priv, BATADV_TT_LOCAL_TIMEOUT); |
30cfd02b | 3065 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
3066 | batadv_tt_req_purge(bat_priv); |
3067 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 3068 | |
72414442 AQ |
3069 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
3070 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 3071 | } |
cc47f66e | 3072 | |
56303d34 | 3073 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 3074 | { |
e1bf0c14 ML |
3075 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
3076 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
3077 | ||
807736f6 | 3078 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 3079 | |
a513088d SE |
3080 | batadv_tt_local_table_free(bat_priv); |
3081 | batadv_tt_global_table_free(bat_priv); | |
3082 | batadv_tt_req_list_free(bat_priv); | |
3083 | batadv_tt_changes_list_free(bat_priv); | |
3084 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 3085 | |
807736f6 | 3086 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 3087 | } |
058d0e26 | 3088 | |
7ea7b4a1 AQ |
3089 | /** |
3090 | * batadv_tt_local_set_flags - set or unset the specified flags on the local | |
3091 | * table and possibly count them in the TT size | |
3092 | * @bat_priv: the bat priv with all the soft interface information | |
3093 | * @flags: the flag to switch | |
3094 | * @enable: whether to set or unset the flag | |
3095 | * @count: whether to increase the TT size by the number of changed entries | |
9cfc7bd6 | 3096 | */ |
7ea7b4a1 AQ |
3097 | static void batadv_tt_local_set_flags(struct batadv_priv *bat_priv, |
3098 | uint16_t flags, bool enable, bool count) | |
058d0e26 | 3099 | { |
7ea7b4a1 AQ |
3100 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
3101 | struct batadv_tt_common_entry *tt_common_entry; | |
697f2531 | 3102 | uint16_t changed_num = 0; |
058d0e26 | 3103 | struct hlist_head *head; |
7ea7b4a1 | 3104 | uint32_t i; |
058d0e26 AQ |
3105 | |
3106 | if (!hash) | |
7ea7b4a1 | 3107 | return; |
058d0e26 AQ |
3108 | |
3109 | for (i = 0; i < hash->size; i++) { | |
3110 | head = &hash->table[i]; | |
3111 | ||
3112 | rcu_read_lock(); | |
b67bfe0d | 3113 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 3114 | head, hash_entry) { |
697f2531 AQ |
3115 | if (enable) { |
3116 | if ((tt_common_entry->flags & flags) == flags) | |
3117 | continue; | |
3118 | tt_common_entry->flags |= flags; | |
3119 | } else { | |
3120 | if (!(tt_common_entry->flags & flags)) | |
3121 | continue; | |
3122 | tt_common_entry->flags &= ~flags; | |
3123 | } | |
3124 | changed_num++; | |
7ea7b4a1 AQ |
3125 | |
3126 | if (!count) | |
3127 | continue; | |
3128 | ||
3129 | batadv_tt_local_size_inc(bat_priv, | |
3130 | tt_common_entry->vid); | |
058d0e26 AQ |
3131 | } |
3132 | rcu_read_unlock(); | |
3133 | } | |
058d0e26 AQ |
3134 | } |
3135 | ||
acd34afa | 3136 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 3137 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 3138 | { |
807736f6 | 3139 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
3140 | struct batadv_tt_common_entry *tt_common; |
3141 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 3142 | struct hlist_node *node_tmp; |
058d0e26 AQ |
3143 | struct hlist_head *head; |
3144 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 3145 | uint32_t i; |
058d0e26 AQ |
3146 | |
3147 | if (!hash) | |
3148 | return; | |
3149 | ||
3150 | for (i = 0; i < hash->size; i++) { | |
3151 | head = &hash->table[i]; | |
3152 | list_lock = &hash->list_locks[i]; | |
3153 | ||
3154 | spin_lock_bh(list_lock); | |
b67bfe0d | 3155 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
3156 | hash_entry) { |
3157 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
3158 | continue; |
3159 | ||
39c75a51 | 3160 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
16052789 AQ |
3161 | "Deleting local tt entry (%pM, vid: %d): pending\n", |
3162 | tt_common->addr, | |
3163 | BATADV_PRINT_VID(tt_common->vid)); | |
058d0e26 | 3164 | |
7ea7b4a1 | 3165 | batadv_tt_local_size_dec(bat_priv, tt_common->vid); |
b67bfe0d | 3166 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
3167 | tt_local = container_of(tt_common, |
3168 | struct batadv_tt_local_entry, | |
3169 | common); | |
3170 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
3171 | } |
3172 | spin_unlock_bh(list_lock); | |
3173 | } | |
058d0e26 AQ |
3174 | } |
3175 | ||
e1bf0c14 | 3176 | /** |
a19d3d85 ML |
3177 | * batadv_tt_local_commit_changes_nolock - commit all pending local tt changes |
3178 | * which have been queued in the time since the last commit | |
e1bf0c14 | 3179 | * @bat_priv: the bat priv with all the soft interface information |
a19d3d85 ML |
3180 | * |
3181 | * Caller must hold tt->commit_lock. | |
e1bf0c14 | 3182 | */ |
a19d3d85 | 3183 | static void batadv_tt_local_commit_changes_nolock(struct batadv_priv *bat_priv) |
058d0e26 | 3184 | { |
c5caf4ef LL |
3185 | /* Update multicast addresses in local translation table */ |
3186 | batadv_mcast_mla_update(bat_priv); | |
3187 | ||
e1bf0c14 ML |
3188 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
3189 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
3190 | batadv_tt_tvlv_container_update(bat_priv); | |
a19d3d85 | 3191 | return; |
e1bf0c14 | 3192 | } |
be9aa4c1 | 3193 | |
7ea7b4a1 | 3194 | batadv_tt_local_set_flags(bat_priv, BATADV_TT_CLIENT_NEW, false, true); |
be9aa4c1 | 3195 | |
a513088d | 3196 | batadv_tt_local_purge_pending_clients(bat_priv); |
7ea7b4a1 | 3197 | batadv_tt_local_update_crc(bat_priv); |
058d0e26 AQ |
3198 | |
3199 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 3200 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 3201 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 3202 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 3203 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
3204 | |
3205 | /* reset the sending counter */ | |
807736f6 | 3206 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 3207 | batadv_tt_tvlv_container_update(bat_priv); |
a19d3d85 | 3208 | } |
a70a9aa9 | 3209 | |
a19d3d85 ML |
3210 | /** |
3211 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
3212 | * have been queued in the time since the last commit | |
3213 | * @bat_priv: the bat priv with all the soft interface information | |
3214 | */ | |
3215 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
3216 | { | |
3217 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3218 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
a70a9aa9 | 3219 | spin_unlock_bh(&bat_priv->tt.commit_lock); |
058d0e26 | 3220 | } |
59b699cd | 3221 | |
56303d34 | 3222 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
b8cbd81d | 3223 | uint8_t *dst, unsigned short vid) |
59b699cd | 3224 | { |
56303d34 SE |
3225 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
3226 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
b8cbd81d | 3227 | struct batadv_softif_vlan *vlan; |
5870adc6 | 3228 | bool ret = false; |
59b699cd | 3229 | |
b8cbd81d AQ |
3230 | vlan = batadv_softif_vlan_get(bat_priv, vid); |
3231 | if (!vlan || !atomic_read(&vlan->ap_isolation)) | |
5870adc6 | 3232 | goto out; |
59b699cd | 3233 | |
b8cbd81d | 3234 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst, vid); |
59b699cd AQ |
3235 | if (!tt_local_entry) |
3236 | goto out; | |
3237 | ||
b8cbd81d | 3238 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src, vid); |
59b699cd AQ |
3239 | if (!tt_global_entry) |
3240 | goto out; | |
3241 | ||
1f129fef | 3242 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
3243 | goto out; |
3244 | ||
5870adc6 | 3245 | ret = true; |
59b699cd AQ |
3246 | |
3247 | out: | |
b8cbd81d AQ |
3248 | if (vlan) |
3249 | batadv_softif_vlan_free_ref(vlan); | |
59b699cd | 3250 | if (tt_global_entry) |
a513088d | 3251 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 3252 | if (tt_local_entry) |
a513088d | 3253 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
3254 | return ret; |
3255 | } | |
a943cac1 | 3256 | |
e1bf0c14 ML |
3257 | /** |
3258 | * batadv_tt_update_orig - update global translation table with new tt | |
3259 | * information received via ogms | |
3260 | * @bat_priv: the bat priv with all the soft interface information | |
3261 | * @orig: the orig_node of the ogm | |
7ea7b4a1 AQ |
3262 | * @tt_vlan: pointer to the first tvlv VLAN entry |
3263 | * @tt_num_vlan: number of tvlv VLAN entries | |
3264 | * @tt_change: pointer to the first entry in the TT buffer | |
e1bf0c14 ML |
3265 | * @tt_num_changes: number of tt changes inside the tt buffer |
3266 | * @ttvn: translation table version number of this changeset | |
ced72933 | 3267 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
3268 | */ |
3269 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
3270 | struct batadv_orig_node *orig_node, | |
7ea7b4a1 AQ |
3271 | const void *tt_buff, uint16_t tt_num_vlan, |
3272 | struct batadv_tvlv_tt_change *tt_change, | |
3273 | uint16_t tt_num_changes, uint8_t ttvn) | |
a943cac1 ML |
3274 | { |
3275 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
7ea7b4a1 | 3276 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
a943cac1 | 3277 | bool full_table = true; |
e17931d1 | 3278 | bool has_tt_init; |
a943cac1 | 3279 | |
7ea7b4a1 | 3280 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)tt_buff; |
e17931d1 LL |
3281 | has_tt_init = orig_node->capa_initialized & BATADV_ORIG_CAPA_HAS_TT; |
3282 | ||
17071578 | 3283 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
3284 | * increased by one -> we can apply the attached changes |
3285 | */ | |
e17931d1 | 3286 | if ((!has_tt_init && ttvn == 1) || ttvn - orig_ttvn == 1) { |
a943cac1 | 3287 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
3288 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
3289 | * times. | |
9cfc7bd6 SE |
3290 | * In this case send a tt request |
3291 | */ | |
a943cac1 ML |
3292 | if (!tt_num_changes) { |
3293 | full_table = false; | |
3294 | goto request_table; | |
3295 | } | |
3296 | ||
a70a9aa9 AQ |
3297 | spin_lock_bh(&orig_node->tt_lock); |
3298 | ||
a513088d | 3299 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 3300 | ttvn, tt_change); |
a943cac1 ML |
3301 | |
3302 | /* Even if we received the precomputed crc with the OGM, we | |
3303 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
3304 | * in the global table |
3305 | */ | |
7ea7b4a1 | 3306 | batadv_tt_global_update_crc(bat_priv, orig_node); |
a943cac1 | 3307 | |
a70a9aa9 AQ |
3308 | spin_unlock_bh(&orig_node->tt_lock); |
3309 | ||
a943cac1 ML |
3310 | /* The ttvn alone is not enough to guarantee consistency |
3311 | * because a single value could represent different states | |
3312 | * (due to the wrap around). Thus a node has to check whether | |
3313 | * the resulting table (after applying the changes) is still | |
3314 | * consistent or not. E.g. a node could disconnect while its | |
3315 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
3316 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
3317 | * inconsistency |
3318 | */ | |
7ea7b4a1 AQ |
3319 | if (!batadv_tt_global_check_crc(orig_node, tt_vlan, |
3320 | tt_num_vlan)) | |
a943cac1 | 3321 | goto request_table; |
a943cac1 ML |
3322 | } else { |
3323 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
3324 | * in sync anymore -> request fresh tt data |
3325 | */ | |
e17931d1 | 3326 | if (!has_tt_init || ttvn != orig_ttvn || |
7ea7b4a1 AQ |
3327 | !batadv_tt_global_check_crc(orig_node, tt_vlan, |
3328 | tt_num_vlan)) { | |
a943cac1 | 3329 | request_table: |
39c75a51 | 3330 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
7ea7b4a1 AQ |
3331 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u num_changes: %u)\n", |
3332 | orig_node->orig, ttvn, orig_ttvn, | |
3333 | tt_num_changes); | |
a513088d | 3334 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
7ea7b4a1 AQ |
3335 | tt_vlan, tt_num_vlan, |
3336 | full_table); | |
a943cac1 ML |
3337 | return; |
3338 | } | |
3339 | } | |
3340 | } | |
3275e7cc | 3341 | |
c018ad3d AQ |
3342 | /** |
3343 | * batadv_tt_global_client_is_roaming - check if a client is marked as roaming | |
3344 | * @bat_priv: the bat priv with all the soft interface information | |
3345 | * @addr: the mac address of the client to check | |
3346 | * @vid: VLAN identifier | |
3347 | * | |
3348 | * Returns true if we know that the client has moved from its old originator | |
3349 | * to another one. This entry is still kept for consistency purposes and will be | |
3350 | * deleted later by a DEL or because of timeout | |
3275e7cc | 3351 | */ |
56303d34 | 3352 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
c018ad3d | 3353 | uint8_t *addr, unsigned short vid) |
3275e7cc | 3354 | { |
56303d34 | 3355 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
3356 | bool ret = false; |
3357 | ||
c018ad3d | 3358 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr, vid); |
3275e7cc AQ |
3359 | if (!tt_global_entry) |
3360 | goto out; | |
3361 | ||
c1d07431 | 3362 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 3363 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
3364 | out: |
3365 | return ret; | |
3366 | } | |
30cfd02b | 3367 | |
7c1fd91d AQ |
3368 | /** |
3369 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
3370 | * @bat_priv: the bat priv with all the soft interface information | |
c018ad3d AQ |
3371 | * @addr: the mac address of the local client to query |
3372 | * @vid: VLAN identifier | |
7c1fd91d AQ |
3373 | * |
3374 | * Returns true if the local client is known to be roaming (it is not served by | |
3375 | * this node anymore) or not. If yes, the client is still present in the table | |
3376 | * to keep the latter consistent with the node TTVN | |
3377 | */ | |
3378 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
c018ad3d | 3379 | uint8_t *addr, unsigned short vid) |
7c1fd91d AQ |
3380 | { |
3381 | struct batadv_tt_local_entry *tt_local_entry; | |
3382 | bool ret = false; | |
3383 | ||
c018ad3d | 3384 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr, vid); |
7c1fd91d AQ |
3385 | if (!tt_local_entry) |
3386 | goto out; | |
3387 | ||
3388 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
3389 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
3390 | out: | |
3391 | return ret; | |
7c1fd91d AQ |
3392 | } |
3393 | ||
30cfd02b AQ |
3394 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
3395 | struct batadv_orig_node *orig_node, | |
c018ad3d | 3396 | const unsigned char *addr, |
16052789 | 3397 | unsigned short vid) |
30cfd02b AQ |
3398 | { |
3399 | bool ret = false; | |
3400 | ||
16052789 | 3401 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, vid, |
30cfd02b AQ |
3402 | BATADV_TT_CLIENT_TEMP, |
3403 | atomic_read(&orig_node->last_ttvn))) | |
3404 | goto out; | |
3405 | ||
3406 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
16052789 AQ |
3407 | "Added temporary global client (addr: %pM, vid: %d, orig: %pM)\n", |
3408 | addr, BATADV_PRINT_VID(vid), orig_node->orig); | |
30cfd02b AQ |
3409 | ret = true; |
3410 | out: | |
3411 | return ret; | |
3412 | } | |
e1bf0c14 | 3413 | |
a19d3d85 ML |
3414 | /** |
3415 | * batadv_tt_local_resize_to_mtu - resize the local translation table fit the | |
3416 | * maximum packet size that can be transported through the mesh | |
3417 | * @soft_iface: netdev struct of the mesh interface | |
3418 | * | |
3419 | * Remove entries older than 'timeout' and half timeout if more entries need | |
3420 | * to be removed. | |
3421 | */ | |
3422 | void batadv_tt_local_resize_to_mtu(struct net_device *soft_iface) | |
3423 | { | |
3424 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); | |
3425 | int packet_size_max = atomic_read(&bat_priv->packet_size_max); | |
3426 | int table_size, timeout = BATADV_TT_LOCAL_TIMEOUT / 2; | |
3427 | bool reduced = false; | |
3428 | ||
3429 | spin_lock_bh(&bat_priv->tt.commit_lock); | |
3430 | ||
3431 | while (true) { | |
3432 | table_size = batadv_tt_local_table_transmit_size(bat_priv); | |
3433 | if (packet_size_max >= table_size) | |
3434 | break; | |
3435 | ||
3436 | batadv_tt_local_purge(bat_priv, timeout); | |
3437 | batadv_tt_local_purge_pending_clients(bat_priv); | |
3438 | ||
3439 | timeout /= 2; | |
3440 | reduced = true; | |
3441 | net_ratelimited_function(batadv_info, soft_iface, | |
3442 | "Forced to purge local tt entries to fit new maximum fragment MTU (%i)\n", | |
3443 | packet_size_max); | |
3444 | } | |
3445 | ||
3446 | /* commit these changes immediately, to avoid synchronization problem | |
3447 | * with the TTVN | |
3448 | */ | |
3449 | if (reduced) | |
3450 | batadv_tt_local_commit_changes_nolock(bat_priv); | |
3451 | ||
3452 | spin_unlock_bh(&bat_priv->tt.commit_lock); | |
3453 | } | |
3454 | ||
e1bf0c14 ML |
3455 | /** |
3456 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
3457 | * @bat_priv: the bat priv with all the soft interface information | |
3458 | * @orig: the orig_node of the ogm | |
3459 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
3460 | * @tvlv_value: tvlv buffer containing the gateway data | |
3461 | * @tvlv_value_len: tvlv buffer length | |
3462 | */ | |
3463 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
3464 | struct batadv_orig_node *orig, | |
7ea7b4a1 | 3465 | uint8_t flags, void *tvlv_value, |
e1bf0c14 ML |
3466 | uint16_t tvlv_value_len) |
3467 | { | |
7ea7b4a1 AQ |
3468 | struct batadv_tvlv_tt_vlan_data *tt_vlan; |
3469 | struct batadv_tvlv_tt_change *tt_change; | |
e1bf0c14 | 3470 | struct batadv_tvlv_tt_data *tt_data; |
7ea7b4a1 | 3471 | uint16_t num_entries, num_vlan; |
e1bf0c14 ML |
3472 | |
3473 | if (tvlv_value_len < sizeof(*tt_data)) | |
3474 | return; | |
3475 | ||
3476 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3477 | tvlv_value_len -= sizeof(*tt_data); | |
3478 | ||
7ea7b4a1 AQ |
3479 | num_vlan = ntohs(tt_data->num_vlan); |
3480 | ||
3481 | if (tvlv_value_len < sizeof(*tt_vlan) * num_vlan) | |
3482 | return; | |
3483 | ||
3484 | tt_vlan = (struct batadv_tvlv_tt_vlan_data *)(tt_data + 1); | |
3485 | tt_change = (struct batadv_tvlv_tt_change *)(tt_vlan + num_vlan); | |
3486 | tvlv_value_len -= sizeof(*tt_vlan) * num_vlan; | |
3487 | ||
298e6e68 | 3488 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 | 3489 | |
7ea7b4a1 AQ |
3490 | batadv_tt_update_orig(bat_priv, orig, tt_vlan, num_vlan, tt_change, |
3491 | num_entries, tt_data->ttvn); | |
e1bf0c14 ML |
3492 | } |
3493 | ||
335fbe0f ML |
3494 | /** |
3495 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
3496 | * container | |
3497 | * @bat_priv: the bat priv with all the soft interface information | |
3498 | * @src: mac address of tt tvlv sender | |
3499 | * @dst: mac address of tt tvlv recipient | |
3500 | * @tvlv_value: tvlv buffer containing the tt data | |
3501 | * @tvlv_value_len: tvlv buffer length | |
3502 | * | |
3503 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
3504 | * otherwise. | |
3505 | */ | |
3506 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3507 | uint8_t *src, uint8_t *dst, | |
3508 | void *tvlv_value, | |
3509 | uint16_t tvlv_value_len) | |
3510 | { | |
3511 | struct batadv_tvlv_tt_data *tt_data; | |
7ea7b4a1 | 3512 | uint16_t tt_vlan_len, tt_num_entries; |
335fbe0f ML |
3513 | char tt_flag; |
3514 | bool ret; | |
3515 | ||
3516 | if (tvlv_value_len < sizeof(*tt_data)) | |
3517 | return NET_RX_SUCCESS; | |
3518 | ||
3519 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
3520 | tvlv_value_len -= sizeof(*tt_data); | |
3521 | ||
7ea7b4a1 AQ |
3522 | tt_vlan_len = sizeof(struct batadv_tvlv_tt_vlan_data); |
3523 | tt_vlan_len *= ntohs(tt_data->num_vlan); | |
3524 | ||
3525 | if (tvlv_value_len < tt_vlan_len) | |
3526 | return NET_RX_SUCCESS; | |
3527 | ||
3528 | tvlv_value_len -= tt_vlan_len; | |
3529 | tt_num_entries = batadv_tt_entries(tvlv_value_len); | |
335fbe0f ML |
3530 | |
3531 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
3532 | case BATADV_TT_REQUEST: | |
3533 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
3534 | ||
3535 | /* If this node cannot provide a TT response the tt_request is | |
3536 | * forwarded | |
3537 | */ | |
3538 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
3539 | if (!ret) { | |
3540 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3541 | tt_flag = 'F'; | |
3542 | else | |
3543 | tt_flag = '.'; | |
3544 | ||
3545 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3546 | "Routing TT_REQUEST to %pM [%c]\n", | |
3547 | dst, tt_flag); | |
3548 | /* tvlv API will re-route the packet */ | |
3549 | return NET_RX_DROP; | |
3550 | } | |
3551 | break; | |
3552 | case BATADV_TT_RESPONSE: | |
3553 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
3554 | ||
3555 | if (batadv_is_my_mac(bat_priv, dst)) { | |
3556 | batadv_handle_tt_response(bat_priv, tt_data, | |
7ea7b4a1 | 3557 | src, tt_num_entries); |
335fbe0f ML |
3558 | return NET_RX_SUCCESS; |
3559 | } | |
3560 | ||
3561 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
3562 | tt_flag = 'F'; | |
3563 | else | |
3564 | tt_flag = '.'; | |
3565 | ||
3566 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3567 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
3568 | ||
3569 | /* tvlv API will re-route the packet */ | |
3570 | return NET_RX_DROP; | |
3571 | } | |
3572 | ||
3573 | return NET_RX_SUCCESS; | |
3574 | } | |
3575 | ||
122edaa0 ML |
3576 | /** |
3577 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
3578 | * @bat_priv: the bat priv with all the soft interface information | |
3579 | * @src: mac address of tt tvlv sender | |
3580 | * @dst: mac address of tt tvlv recipient | |
3581 | * @tvlv_value: tvlv buffer containing the tt data | |
3582 | * @tvlv_value_len: tvlv buffer length | |
3583 | * | |
3584 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
3585 | * otherwise. | |
3586 | */ | |
3587 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
3588 | uint8_t *src, uint8_t *dst, | |
3589 | void *tvlv_value, | |
3590 | uint16_t tvlv_value_len) | |
3591 | { | |
3592 | struct batadv_tvlv_roam_adv *roaming_adv; | |
3593 | struct batadv_orig_node *orig_node = NULL; | |
3594 | ||
3595 | /* If this node is not the intended recipient of the | |
3596 | * roaming advertisement the packet is forwarded | |
3597 | * (the tvlv API will re-route the packet). | |
3598 | */ | |
3599 | if (!batadv_is_my_mac(bat_priv, dst)) | |
3600 | return NET_RX_DROP; | |
3601 | ||
122edaa0 ML |
3602 | if (tvlv_value_len < sizeof(*roaming_adv)) |
3603 | goto out; | |
3604 | ||
3605 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
3606 | if (!orig_node) | |
3607 | goto out; | |
3608 | ||
3609 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
3610 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
3611 | ||
3612 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
3613 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
3614 | src, roaming_adv->client); | |
3615 | ||
3616 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
c018ad3d | 3617 | ntohs(roaming_adv->vid), BATADV_TT_CLIENT_ROAM, |
122edaa0 ML |
3618 | atomic_read(&orig_node->last_ttvn) + 1); |
3619 | ||
3620 | out: | |
3621 | if (orig_node) | |
3622 | batadv_orig_node_free_ref(orig_node); | |
3623 | return NET_RX_SUCCESS; | |
3624 | } | |
3625 | ||
e1bf0c14 ML |
3626 | /** |
3627 | * batadv_tt_init - initialise the translation table internals | |
3628 | * @bat_priv: the bat priv with all the soft interface information | |
3629 | * | |
3630 | * Return 0 on success or negative error number in case of failure. | |
3631 | */ | |
3632 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
3633 | { | |
3634 | int ret; | |
3635 | ||
0eb01568 AQ |
3636 | /* synchronized flags must be remote */ |
3637 | BUILD_BUG_ON(!(BATADV_TT_SYNC_MASK & BATADV_TT_REMOTE_MASK)); | |
3638 | ||
e1bf0c14 ML |
3639 | ret = batadv_tt_local_init(bat_priv); |
3640 | if (ret < 0) | |
3641 | return ret; | |
3642 | ||
3643 | ret = batadv_tt_global_init(bat_priv); | |
3644 | if (ret < 0) | |
3645 | return ret; | |
3646 | ||
3647 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
3648 | batadv_tt_tvlv_unicast_handler_v1, |
3649 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 3650 | |
122edaa0 ML |
3651 | batadv_tvlv_handler_register(bat_priv, NULL, |
3652 | batadv_roam_tvlv_unicast_handler_v1, | |
3653 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
3654 | ||
e1bf0c14 ML |
3655 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
3656 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
3657 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
3658 | ||
3659 | return 1; | |
3660 | } | |
42cb0bef AQ |
3661 | |
3662 | /** | |
3663 | * batadv_tt_global_is_isolated - check if a client is marked as isolated | |
3664 | * @bat_priv: the bat priv with all the soft interface information | |
3665 | * @addr: the mac address of the client | |
3666 | * @vid: the identifier of the VLAN where this client is connected | |
3667 | * | |
3668 | * Returns true if the client is marked with the TT_CLIENT_ISOLA flag, false | |
3669 | * otherwise | |
3670 | */ | |
3671 | bool batadv_tt_global_is_isolated(struct batadv_priv *bat_priv, | |
3672 | const uint8_t *addr, unsigned short vid) | |
3673 | { | |
3674 | struct batadv_tt_global_entry *tt; | |
3675 | bool ret; | |
3676 | ||
3677 | tt = batadv_tt_global_hash_find(bat_priv, addr, vid); | |
3678 | if (!tt) | |
3679 | return false; | |
3680 | ||
3681 | ret = tt->common.flags & BATADV_TT_CLIENT_ISOLA; | |
3682 | ||
3683 | batadv_tt_global_entry_free_ref(tt); | |
3684 | ||
3685 | return ret; | |
3686 | } |