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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
ced72933 | 30 | #include <linux/crc32c.h> |
a73105b8 | 31 | |
dec05074 AQ |
32 | /* hash class keys */ |
33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
35 | ||
56303d34 SE |
36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
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, | |
44 | const char *message, bool roaming); | |
c6c8fea2 | 45 | |
7aadf889 | 46 | /* returns 1 if they are the same mac addr */ |
a513088d | 47 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 48 | { |
56303d34 | 49 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 50 | hash_entry); |
7aadf889 ML |
51 | |
52 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
53 | } | |
54 | ||
56303d34 | 55 | static struct batadv_tt_common_entry * |
5bf74e9c | 56 | batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) |
7aadf889 | 57 | { |
7aadf889 | 58 | struct hlist_head *head; |
56303d34 SE |
59 | struct batadv_tt_common_entry *tt_common_entry; |
60 | struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; | |
c90681b8 | 61 | uint32_t index; |
7aadf889 ML |
62 | |
63 | if (!hash) | |
64 | return NULL; | |
65 | ||
da641193 | 66 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
67 | head = &hash->table[index]; |
68 | ||
69 | rcu_read_lock(); | |
b67bfe0d | 70 | hlist_for_each_entry_rcu(tt_common_entry, head, hash_entry) { |
1eda58bf | 71 | if (!batadv_compare_eth(tt_common_entry, data)) |
7aadf889 ML |
72 | continue; |
73 | ||
48100bac | 74 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
7683fdc1 AQ |
75 | continue; |
76 | ||
48100bac | 77 | tt_common_entry_tmp = tt_common_entry; |
7aadf889 ML |
78 | break; |
79 | } | |
80 | rcu_read_unlock(); | |
81 | ||
48100bac | 82 | return tt_common_entry_tmp; |
7aadf889 ML |
83 | } |
84 | ||
56303d34 SE |
85 | static struct batadv_tt_local_entry * |
86 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 87 | { |
56303d34 SE |
88 | struct batadv_tt_common_entry *tt_common_entry; |
89 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 90 | |
807736f6 | 91 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); |
48100bac AQ |
92 | if (tt_common_entry) |
93 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
94 | struct batadv_tt_local_entry, |
95 | common); | |
48100bac AQ |
96 | return tt_local_entry; |
97 | } | |
7aadf889 | 98 | |
56303d34 SE |
99 | static struct batadv_tt_global_entry * |
100 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) | |
48100bac | 101 | { |
56303d34 SE |
102 | struct batadv_tt_common_entry *tt_common_entry; |
103 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 104 | |
807736f6 | 105 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); |
48100bac AQ |
106 | if (tt_common_entry) |
107 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
108 | struct batadv_tt_global_entry, |
109 | common); | |
48100bac | 110 | return tt_global_entry; |
7aadf889 ML |
111 | } |
112 | ||
a513088d | 113 | static void |
56303d34 | 114 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 115 | { |
48100bac AQ |
116 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
117 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
118 | } |
119 | ||
21026059 AQ |
120 | /** |
121 | * batadv_tt_global_entry_free_ref - decrement the refcounter for a | |
122 | * tt_global_entry and possibly free it | |
123 | * @tt_global_entry: the object to free | |
124 | */ | |
a513088d | 125 | static void |
56303d34 | 126 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 127 | { |
db08e6e5 | 128 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 129 | batadv_tt_global_del_orig_list(tt_global_entry); |
21026059 | 130 | kfree_rcu(tt_global_entry, common.rcu); |
db08e6e5 SW |
131 | } |
132 | } | |
133 | ||
a513088d | 134 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 135 | { |
56303d34 | 136 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 137 | |
56303d34 | 138 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
139 | |
140 | /* We are in an rcu callback here, therefore we cannot use | |
141 | * batadv_orig_node_free_ref() and its call_rcu(): | |
142 | * An rcu_barrier() wouldn't wait for that to finish | |
143 | */ | |
144 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
145 | kfree(orig_entry); |
146 | } | |
147 | ||
a513088d | 148 | static void |
56303d34 | 149 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 150 | { |
d657e621 AQ |
151 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
152 | return; | |
29cb99de AQ |
153 | /* to avoid race conditions, immediately decrease the tt counter */ |
154 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 155 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
156 | } |
157 | ||
3abe4adb AQ |
158 | /** |
159 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
160 | * @bat_priv: the bat priv with all the soft interface information | |
161 | * @tt_local_entry: the TT entry involved in the event | |
162 | * @event_flags: flags to store in the event structure | |
163 | */ | |
56303d34 | 164 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
165 | struct batadv_tt_local_entry *tt_local_entry, |
166 | uint8_t event_flags) | |
a73105b8 | 167 | { |
56303d34 | 168 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
169 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
170 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
171 | bool event_removed = false; |
172 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
173 | |
174 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
a73105b8 AQ |
175 | if (!tt_change_node) |
176 | return; | |
177 | ||
ff66c975 | 178 | tt_change_node->change.flags = flags; |
e1bf0c14 | 179 | tt_change_node->change.reserved = 0; |
3abe4adb | 180 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
a73105b8 | 181 | |
acd34afa | 182 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
183 | |
184 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
185 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
186 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 187 | list) { |
3abe4adb | 188 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
189 | continue; |
190 | ||
191 | /* DEL+ADD in the same orig interval have no effect and can be | |
192 | * removed to avoid silly behaviour on the receiver side. The | |
193 | * other way around (ADD+DEL) can happen in case of roaming of | |
194 | * a client still in the NEW state. Roaming of NEW clients is | |
195 | * now possible due to automatically recognition of "temporary" | |
196 | * clients | |
197 | */ | |
acd34afa | 198 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
199 | if (!del_op_requested && del_op_entry) |
200 | goto del; | |
201 | if (del_op_requested && !del_op_entry) | |
202 | goto del; | |
203 | continue; | |
204 | del: | |
205 | list_del(&entry->list); | |
206 | kfree(entry); | |
155e4e12 | 207 | kfree(tt_change_node); |
3b643de5 AQ |
208 | event_removed = true; |
209 | goto unlock; | |
210 | } | |
211 | ||
a73105b8 | 212 | /* track the change in the OGMinterval list */ |
807736f6 | 213 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
214 | |
215 | unlock: | |
807736f6 | 216 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 217 | |
3b643de5 | 218 | if (event_removed) |
807736f6 | 219 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 220 | else |
807736f6 | 221 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
222 | } |
223 | ||
335fbe0f ML |
224 | /** |
225 | * batadv_tt_len - compute length in bytes of given number of tt changes | |
226 | * @changes_num: number of tt changes | |
227 | * | |
228 | * Returns computed length in bytes. | |
229 | */ | |
230 | static int batadv_tt_len(int changes_num) | |
a73105b8 | 231 | { |
335fbe0f | 232 | return changes_num * sizeof(struct batadv_tvlv_tt_change); |
a73105b8 AQ |
233 | } |
234 | ||
298e6e68 AQ |
235 | /** |
236 | * batadv_tt_entries - compute the number of entries fitting in tt_len bytes | |
237 | * @tt_len: available space | |
238 | * | |
239 | * Returns the number of entries. | |
240 | */ | |
241 | static uint16_t batadv_tt_entries(uint16_t tt_len) | |
242 | { | |
243 | return tt_len / batadv_tt_len(1); | |
244 | } | |
245 | ||
56303d34 | 246 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 247 | { |
807736f6 | 248 | if (bat_priv->tt.local_hash) |
5346c35e | 249 | return 0; |
c6c8fea2 | 250 | |
807736f6 | 251 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 252 | |
807736f6 | 253 | if (!bat_priv->tt.local_hash) |
5346c35e | 254 | return -ENOMEM; |
c6c8fea2 | 255 | |
dec05074 AQ |
256 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
257 | &batadv_tt_local_hash_lock_class_key); | |
258 | ||
5346c35e | 259 | return 0; |
c6c8fea2 SE |
260 | } |
261 | ||
068ee6e2 AQ |
262 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
263 | struct batadv_tt_global_entry *tt_global, | |
264 | const char *message) | |
265 | { | |
266 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
267 | "Deleting global tt entry %pM: %s\n", | |
268 | tt_global->common.addr, message); | |
269 | ||
270 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
271 | batadv_choose_orig, tt_global->common.addr); | |
272 | batadv_tt_global_entry_free_ref(tt_global); | |
068ee6e2 AQ |
273 | } |
274 | ||
08c36d3e SE |
275 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
276 | int ifindex) | |
c6c8fea2 | 277 | { |
56303d34 | 278 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
279 | struct batadv_tt_local_entry *tt_local; |
280 | struct batadv_tt_global_entry *tt_global; | |
db08e6e5 | 281 | struct hlist_head *head; |
56303d34 | 282 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 283 | int hash_added; |
068ee6e2 | 284 | bool roamed_back = false; |
c6c8fea2 | 285 | |
47c94655 | 286 | tt_local = batadv_tt_local_hash_find(bat_priv, addr); |
068ee6e2 | 287 | tt_global = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 288 | |
47c94655 AQ |
289 | if (tt_local) { |
290 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
291 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
292 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
293 | "Re-adding pending client %pM\n", addr); | |
294 | /* whatever the reason why the PENDING flag was set, | |
295 | * this is a client which was enqueued to be removed in | |
296 | * this orig_interval. Since it popped up again, the | |
297 | * flag can be reset like it was never enqueued | |
298 | */ | |
299 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
300 | goto add_event; | |
301 | } | |
302 | ||
303 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
304 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
305 | "Roaming client %pM came back to its original location\n", | |
306 | addr); | |
307 | /* the ROAM flag is set because this client roamed away | |
308 | * and the node got a roaming_advertisement message. Now | |
309 | * that the client popped up again at its original | |
310 | * location such flag can be unset | |
311 | */ | |
312 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
313 | roamed_back = true; | |
314 | } | |
315 | goto check_roaming; | |
c6c8fea2 SE |
316 | } |
317 | ||
47c94655 AQ |
318 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
319 | if (!tt_local) | |
7683fdc1 | 320 | goto out; |
a73105b8 | 321 | |
39c75a51 | 322 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 323 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
807736f6 | 324 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 325 | |
47c94655 | 326 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
327 | /* The local entry has to be marked as NEW to avoid to send it in |
328 | * a full table response going out before the next ttvn increment | |
329 | * (consistency check) | |
330 | */ | |
331 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
9563877e | 332 | if (batadv_is_wifi_iface(ifindex)) |
47c94655 AQ |
333 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
334 | atomic_set(&tt_local->common.refcount, 2); | |
335 | tt_local->last_seen = jiffies; | |
336 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
337 | |
338 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 339 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 340 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 341 | |
807736f6 | 342 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
47c94655 AQ |
343 | batadv_choose_orig, &tt_local->common, |
344 | &tt_local->common.hash_entry); | |
80b3f58c SW |
345 | |
346 | if (unlikely(hash_added != 0)) { | |
347 | /* remove the reference for the hash */ | |
47c94655 | 348 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
349 | goto out; |
350 | } | |
351 | ||
068ee6e2 | 352 | add_event: |
3abe4adb | 353 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 354 | |
068ee6e2 AQ |
355 | check_roaming: |
356 | /* Check whether it is a roaming, but don't do anything if the roaming | |
357 | * process has already been handled | |
358 | */ | |
359 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 360 | /* These node are probably going to update their tt table */ |
47c94655 | 361 | head = &tt_global->orig_list; |
db08e6e5 | 362 | rcu_read_lock(); |
b67bfe0d | 363 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 364 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
a513088d | 365 | orig_entry->orig_node); |
db08e6e5 SW |
366 | } |
367 | rcu_read_unlock(); | |
068ee6e2 AQ |
368 | if (roamed_back) { |
369 | batadv_tt_global_free(bat_priv, tt_global, | |
370 | "Roaming canceled"); | |
371 | tt_global = NULL; | |
372 | } else { | |
373 | /* The global entry has to be marked as ROAMING and | |
374 | * has to be kept for consistency purpose | |
375 | */ | |
376 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
377 | tt_global->roam_at = jiffies; | |
378 | } | |
7683fdc1 | 379 | } |
068ee6e2 | 380 | |
7683fdc1 | 381 | out: |
47c94655 AQ |
382 | if (tt_local) |
383 | batadv_tt_local_entry_free_ref(tt_local); | |
384 | if (tt_global) | |
385 | batadv_tt_global_entry_free_ref(tt_global); | |
c6c8fea2 SE |
386 | } |
387 | ||
e1bf0c14 ML |
388 | /** |
389 | * batadv_tt_tvlv_container_update - update the translation table tvlv container | |
390 | * after local tt changes have been committed | |
391 | * @bat_priv: the bat priv with all the soft interface information | |
392 | */ | |
393 | static void batadv_tt_tvlv_container_update(struct batadv_priv *bat_priv) | |
be9aa4c1 | 394 | { |
e1bf0c14 ML |
395 | struct batadv_tt_change_node *entry, *safe; |
396 | struct batadv_tvlv_tt_data *tt_data; | |
397 | struct batadv_tvlv_tt_change *tt_change; | |
398 | int tt_diff_len = 0, tt_change_len = 0; | |
399 | int tt_diff_entries_num = 0, tt_diff_entries_count = 0; | |
be9aa4c1 | 400 | |
e1bf0c14 | 401 | tt_diff_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
be9aa4c1 ML |
402 | |
403 | /* if we have too many changes for one packet don't send any | |
404 | * and wait for the tt table request which will be fragmented | |
405 | */ | |
e1bf0c14 ML |
406 | if (tt_diff_len > bat_priv->soft_iface->mtu) |
407 | tt_diff_len = 0; | |
be9aa4c1 | 408 | |
e1bf0c14 ML |
409 | tt_data = kzalloc(sizeof(*tt_data) + tt_diff_len, GFP_ATOMIC); |
410 | if (!tt_data) | |
411 | return; | |
be9aa4c1 | 412 | |
e1bf0c14 ML |
413 | tt_data->flags = BATADV_TT_OGM_DIFF; |
414 | tt_data->ttvn = atomic_read(&bat_priv->tt.vn); | |
ced72933 | 415 | tt_data->crc = htonl(bat_priv->tt.local_crc); |
c6c8fea2 | 416 | |
e1bf0c14 ML |
417 | if (tt_diff_len == 0) |
418 | goto container_register; | |
be9aa4c1 | 419 | |
298e6e68 | 420 | tt_diff_entries_num = batadv_tt_entries(tt_diff_len); |
c6c8fea2 | 421 | |
807736f6 SE |
422 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
423 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 424 | |
e1bf0c14 ML |
425 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
426 | ||
807736f6 | 427 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 428 | list) { |
e1bf0c14 ML |
429 | if (tt_diff_entries_count < tt_diff_entries_num) { |
430 | memcpy(tt_change + tt_diff_entries_count, | |
431 | &entry->change, | |
432 | sizeof(struct batadv_tvlv_tt_change)); | |
433 | tt_diff_entries_count++; | |
c6c8fea2 | 434 | } |
a73105b8 AQ |
435 | list_del(&entry->list); |
436 | kfree(entry); | |
c6c8fea2 | 437 | } |
807736f6 | 438 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
439 | |
440 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
441 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
442 | kfree(bat_priv->tt.last_changeset); | |
443 | bat_priv->tt.last_changeset_len = 0; | |
444 | bat_priv->tt.last_changeset = NULL; | |
e1bf0c14 | 445 | tt_change_len = batadv_tt_len(tt_diff_entries_count); |
be9aa4c1 | 446 | /* check whether this new OGM has no changes due to size problems */ |
e1bf0c14 | 447 | if (tt_diff_entries_count > 0) { |
be9aa4c1 | 448 | /* if kmalloc() fails we will reply with the full table |
a73105b8 AQ |
449 | * instead of providing the diff |
450 | */ | |
e1bf0c14 | 451 | bat_priv->tt.last_changeset = kzalloc(tt_diff_len, GFP_ATOMIC); |
807736f6 | 452 | if (bat_priv->tt.last_changeset) { |
e1bf0c14 ML |
453 | memcpy(bat_priv->tt.last_changeset, |
454 | tt_change, tt_change_len); | |
455 | bat_priv->tt.last_changeset_len = tt_diff_len; | |
a73105b8 AQ |
456 | } |
457 | } | |
807736f6 | 458 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 459 | |
e1bf0c14 ML |
460 | container_register: |
461 | batadv_tvlv_container_register(bat_priv, BATADV_TVLV_TT, 1, tt_data, | |
462 | sizeof(*tt_data) + tt_change_len); | |
463 | kfree(tt_data); | |
c6c8fea2 SE |
464 | } |
465 | ||
08c36d3e | 466 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
467 | { |
468 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 469 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 470 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 471 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 472 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 473 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 474 | struct hlist_head *head; |
c90681b8 | 475 | uint32_t i; |
85766a82 AQ |
476 | int last_seen_secs; |
477 | int last_seen_msecs; | |
478 | unsigned long last_seen_jiffies; | |
479 | bool no_purge; | |
480 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 481 | |
30da63a6 ML |
482 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
483 | if (!primary_if) | |
32ae9b22 | 484 | goto out; |
c6c8fea2 | 485 | |
86ceb360 | 486 | seq_printf(seq, |
ced72933 | 487 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.8x):\n", |
f9d8a537 AQ |
488 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), |
489 | bat_priv->tt.local_crc); | |
85766a82 AQ |
490 | seq_printf(seq, " %-13s %-7s %-10s\n", "Client", "Flags", |
491 | "Last seen"); | |
c6c8fea2 | 492 | |
c6c8fea2 SE |
493 | for (i = 0; i < hash->size; i++) { |
494 | head = &hash->table[i]; | |
495 | ||
7aadf889 | 496 | rcu_read_lock(); |
b67bfe0d | 497 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 498 | head, hash_entry) { |
85766a82 AQ |
499 | tt_local = container_of(tt_common_entry, |
500 | struct batadv_tt_local_entry, | |
501 | common); | |
502 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
503 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
504 | last_seen_secs = last_seen_msecs / 1000; | |
505 | last_seen_msecs = last_seen_msecs % 1000; | |
506 | ||
507 | no_purge = tt_common_entry->flags & np_flag; | |
508 | ||
509 | seq_printf(seq, " * %pM [%c%c%c%c%c] %3u.%03u\n", | |
7c64fd98 SE |
510 | tt_common_entry->addr, |
511 | (tt_common_entry->flags & | |
acd34afa | 512 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 513 | no_purge ? 'P' : '.', |
7c64fd98 | 514 | (tt_common_entry->flags & |
acd34afa | 515 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 516 | (tt_common_entry->flags & |
acd34afa | 517 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 518 | (tt_common_entry->flags & |
85766a82 | 519 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
a7966d90 AQ |
520 | no_purge ? 0 : last_seen_secs, |
521 | no_purge ? 0 : last_seen_msecs); | |
c6c8fea2 | 522 | } |
7aadf889 | 523 | rcu_read_unlock(); |
c6c8fea2 | 524 | } |
32ae9b22 ML |
525 | out: |
526 | if (primary_if) | |
e5d89254 | 527 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 528 | return 0; |
c6c8fea2 SE |
529 | } |
530 | ||
56303d34 SE |
531 | static void |
532 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
533 | struct batadv_tt_local_entry *tt_local_entry, | |
534 | uint16_t flags, const char *message) | |
c6c8fea2 | 535 | { |
3abe4adb | 536 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 537 | |
015758d0 AQ |
538 | /* The local client has to be marked as "pending to be removed" but has |
539 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
540 | * response issued before the net ttvn increment (consistency check) |
541 | */ | |
acd34afa | 542 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 543 | |
39c75a51 | 544 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
545 | "Local tt entry (%pM) pending to be removed: %s\n", |
546 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
547 | } |
548 | ||
7f91d06c AQ |
549 | /** |
550 | * batadv_tt_local_remove - logically remove an entry from the local table | |
551 | * @bat_priv: the bat priv with all the soft interface information | |
552 | * @addr: the MAC address of the client to remove | |
553 | * @message: message to append to the log on deletion | |
554 | * @roaming: true if the deletion is due to a roaming event | |
555 | * | |
556 | * Returns the flags assigned to the local entry before being deleted | |
557 | */ | |
558 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
559 | const uint8_t *addr, const char *message, | |
560 | bool roaming) | |
c6c8fea2 | 561 | { |
170173bf | 562 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 563 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 564 | |
a513088d | 565 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
566 | if (!tt_local_entry) |
567 | goto out; | |
568 | ||
7f91d06c AQ |
569 | curr_flags = tt_local_entry->common.flags; |
570 | ||
acd34afa | 571 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
572 | /* if this global entry addition is due to a roaming, the node has to |
573 | * mark the local entry as "roamed" in order to correctly reroute | |
574 | * packets later | |
575 | */ | |
7c1fd91d | 576 | if (roaming) { |
acd34afa | 577 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
578 | /* mark the local client as ROAMed */ |
579 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
580 | } | |
42d0b044 | 581 | |
068ee6e2 AQ |
582 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
583 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
584 | message); | |
585 | goto out; | |
586 | } | |
587 | /* if this client has been added right now, it is possible to | |
588 | * immediately purge it | |
589 | */ | |
3abe4adb | 590 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
591 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
592 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 593 | |
7683fdc1 AQ |
594 | out: |
595 | if (tt_local_entry) | |
a513088d | 596 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
597 | |
598 | return curr_flags; | |
c6c8fea2 SE |
599 | } |
600 | ||
56303d34 | 601 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 602 | struct hlist_head *head) |
c6c8fea2 | 603 | { |
56303d34 SE |
604 | struct batadv_tt_local_entry *tt_local_entry; |
605 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 606 | struct hlist_node *node_tmp; |
acd34afa | 607 | |
b67bfe0d | 608 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
609 | hash_entry) { |
610 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
611 | struct batadv_tt_local_entry, |
612 | common); | |
acd34afa SE |
613 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
614 | continue; | |
615 | ||
616 | /* entry already marked for deletion */ | |
617 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
618 | continue; | |
619 | ||
620 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
621 | BATADV_TT_LOCAL_TIMEOUT)) | |
622 | continue; | |
623 | ||
624 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
625 | BATADV_TT_CLIENT_DEL, "timed out"); | |
626 | } | |
627 | } | |
628 | ||
56303d34 | 629 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 630 | { |
807736f6 | 631 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 632 | struct hlist_head *head; |
7683fdc1 | 633 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 634 | uint32_t i; |
c6c8fea2 | 635 | |
c6c8fea2 SE |
636 | for (i = 0; i < hash->size; i++) { |
637 | head = &hash->table[i]; | |
7683fdc1 | 638 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 639 | |
7683fdc1 | 640 | spin_lock_bh(list_lock); |
acd34afa | 641 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 642 | spin_unlock_bh(list_lock); |
c6c8fea2 | 643 | } |
c6c8fea2 SE |
644 | } |
645 | ||
56303d34 | 646 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 647 | { |
5bf74e9c | 648 | struct batadv_hashtable *hash; |
a73105b8 | 649 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
650 | struct batadv_tt_common_entry *tt_common_entry; |
651 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 652 | struct hlist_node *node_tmp; |
7683fdc1 | 653 | struct hlist_head *head; |
c90681b8 | 654 | uint32_t i; |
a73105b8 | 655 | |
807736f6 | 656 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
657 | return; |
658 | ||
807736f6 | 659 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
660 | |
661 | for (i = 0; i < hash->size; i++) { | |
662 | head = &hash->table[i]; | |
663 | list_lock = &hash->list_locks[i]; | |
664 | ||
665 | spin_lock_bh(list_lock); | |
b67bfe0d | 666 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 667 | head, hash_entry) { |
b67bfe0d | 668 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
669 | tt_local = container_of(tt_common_entry, |
670 | struct batadv_tt_local_entry, | |
671 | common); | |
672 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
673 | } |
674 | spin_unlock_bh(list_lock); | |
675 | } | |
676 | ||
1a8eaf07 | 677 | batadv_hash_destroy(hash); |
a73105b8 | 678 | |
807736f6 | 679 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
680 | } |
681 | ||
56303d34 | 682 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 683 | { |
807736f6 | 684 | if (bat_priv->tt.global_hash) |
5346c35e | 685 | return 0; |
c6c8fea2 | 686 | |
807736f6 | 687 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 688 | |
807736f6 | 689 | if (!bat_priv->tt.global_hash) |
5346c35e | 690 | return -ENOMEM; |
c6c8fea2 | 691 | |
dec05074 AQ |
692 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
693 | &batadv_tt_global_hash_lock_class_key); | |
694 | ||
5346c35e | 695 | return 0; |
c6c8fea2 SE |
696 | } |
697 | ||
56303d34 | 698 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 699 | { |
56303d34 | 700 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 701 | |
807736f6 | 702 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 703 | |
807736f6 | 704 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
705 | list) { |
706 | list_del(&entry->list); | |
707 | kfree(entry); | |
708 | } | |
c6c8fea2 | 709 | |
807736f6 SE |
710 | atomic_set(&bat_priv->tt.local_changes, 0); |
711 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 712 | } |
c6c8fea2 | 713 | |
d657e621 AQ |
714 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
715 | * batadv_tt_global_entry list | |
716 | * | |
717 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 718 | */ |
d657e621 AQ |
719 | static struct batadv_tt_orig_list_entry * |
720 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
721 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 722 | { |
d657e621 | 723 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 724 | const struct hlist_head *head; |
db08e6e5 SW |
725 | |
726 | rcu_read_lock(); | |
727 | head = &entry->orig_list; | |
b67bfe0d | 728 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
729 | if (tmp_orig_entry->orig_node != orig_node) |
730 | continue; | |
731 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
732 | continue; | |
733 | ||
734 | orig_entry = tmp_orig_entry; | |
735 | break; | |
db08e6e5 SW |
736 | } |
737 | rcu_read_unlock(); | |
d657e621 AQ |
738 | |
739 | return orig_entry; | |
740 | } | |
741 | ||
742 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
743 | * returns true if found, false otherwise | |
744 | */ | |
745 | static bool | |
746 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
747 | const struct batadv_orig_node *orig_node) | |
748 | { | |
749 | struct batadv_tt_orig_list_entry *orig_entry; | |
750 | bool found = false; | |
751 | ||
752 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
753 | if (orig_entry) { | |
754 | found = true; | |
755 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
756 | } | |
757 | ||
db08e6e5 SW |
758 | return found; |
759 | } | |
760 | ||
a513088d | 761 | static void |
d657e621 | 762 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 763 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 764 | { |
56303d34 | 765 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 766 | |
d657e621 | 767 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
768 | if (orig_entry) { |
769 | /* refresh the ttvn: the current value could be a bogus one that | |
770 | * was added during a "temporary client detection" | |
771 | */ | |
772 | orig_entry->ttvn = ttvn; | |
d657e621 | 773 | goto out; |
30cfd02b | 774 | } |
d657e621 | 775 | |
db08e6e5 SW |
776 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
777 | if (!orig_entry) | |
d657e621 | 778 | goto out; |
db08e6e5 SW |
779 | |
780 | INIT_HLIST_NODE(&orig_entry->list); | |
781 | atomic_inc(&orig_node->refcount); | |
782 | atomic_inc(&orig_node->tt_size); | |
783 | orig_entry->orig_node = orig_node; | |
784 | orig_entry->ttvn = ttvn; | |
d657e621 | 785 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 786 | |
d657e621 | 787 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 788 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
789 | &tt_global->orig_list); |
790 | spin_unlock_bh(&tt_global->list_lock); | |
791 | out: | |
792 | if (orig_entry) | |
793 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
794 | } |
795 | ||
d4ff40f6 AQ |
796 | /** |
797 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
798 | * @bat_priv: the bat priv with all the soft interface information | |
799 | * @orig_node: the originator announcing the client | |
800 | * @tt_addr: the mac address of the non-mesh client | |
801 | * @flags: TT flags that have to be set for this non-mesh client | |
802 | * @ttvn: the tt version number ever announcing this non-mesh client | |
803 | * | |
804 | * Add a new TT global entry for the given originator. If the entry already | |
805 | * exists add a new reference to the given originator (a global entry can have | |
806 | * references to multiple originators) and adjust the flags attribute to reflect | |
807 | * the function argument. | |
808 | * If a TT local entry exists for this non-mesh client remove it. | |
809 | * | |
810 | * The caller must hold orig_node refcount. | |
1e5d49fc AQ |
811 | * |
812 | * Return true if the new entry has been added, false otherwise | |
d4ff40f6 | 813 | */ |
1e5d49fc AQ |
814 | static bool batadv_tt_global_add(struct batadv_priv *bat_priv, |
815 | struct batadv_orig_node *orig_node, | |
816 | const unsigned char *tt_addr, uint16_t flags, | |
817 | uint8_t ttvn) | |
a73105b8 | 818 | { |
170173bf SE |
819 | struct batadv_tt_global_entry *tt_global_entry; |
820 | struct batadv_tt_local_entry *tt_local_entry; | |
1e5d49fc | 821 | bool ret = false; |
80b3f58c | 822 | int hash_added; |
56303d34 | 823 | struct batadv_tt_common_entry *common; |
7f91d06c | 824 | uint16_t local_flags; |
c6c8fea2 | 825 | |
a513088d | 826 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
068ee6e2 AQ |
827 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr); |
828 | ||
829 | /* if the node already has a local client for this entry, it has to wait | |
830 | * for a roaming advertisement instead of manually messing up the global | |
831 | * table | |
832 | */ | |
833 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
834 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
835 | goto out; | |
a73105b8 AQ |
836 | |
837 | if (!tt_global_entry) { | |
d4f44692 | 838 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 839 | if (!tt_global_entry) |
7683fdc1 AQ |
840 | goto out; |
841 | ||
c0a55929 SE |
842 | common = &tt_global_entry->common; |
843 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 844 | |
d4f44692 | 845 | common->flags = flags; |
cc47f66e | 846 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
847 | /* node must store current time in case of roaming. This is |
848 | * needed to purge this entry out on timeout (if nobody claims | |
849 | * it) | |
850 | */ | |
851 | if (flags & BATADV_TT_CLIENT_ROAM) | |
852 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 853 | atomic_set(&common->refcount, 2); |
30cfd02b | 854 | common->added_at = jiffies; |
db08e6e5 SW |
855 | |
856 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
857 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 858 | |
807736f6 | 859 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d SE |
860 | batadv_compare_tt, |
861 | batadv_choose_orig, common, | |
862 | &common->hash_entry); | |
80b3f58c SW |
863 | |
864 | if (unlikely(hash_added != 0)) { | |
865 | /* remove the reference for the hash */ | |
a513088d | 866 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
867 | goto out_remove; |
868 | } | |
a73105b8 | 869 | } else { |
068ee6e2 | 870 | common = &tt_global_entry->common; |
30cfd02b AQ |
871 | /* If there is already a global entry, we can use this one for |
872 | * our processing. | |
068ee6e2 AQ |
873 | * But if we are trying to add a temporary client then here are |
874 | * two options at this point: | |
875 | * 1) the global client is not a temporary client: the global | |
876 | * client has to be left as it is, temporary information | |
877 | * should never override any already known client state | |
878 | * 2) the global client is a temporary client: purge the | |
879 | * originator list and add the new one orig_entry | |
30cfd02b | 880 | */ |
068ee6e2 AQ |
881 | if (flags & BATADV_TT_CLIENT_TEMP) { |
882 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
883 | goto out; | |
884 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
885 | orig_node)) | |
886 | goto out_remove; | |
887 | batadv_tt_global_del_orig_list(tt_global_entry); | |
888 | goto add_orig_entry; | |
889 | } | |
30cfd02b AQ |
890 | |
891 | /* if the client was temporary added before receiving the first | |
892 | * OGM announcing it, we have to clear the TEMP flag | |
893 | */ | |
068ee6e2 | 894 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 895 | |
e9c00136 AQ |
896 | /* the change can carry possible "attribute" flags like the |
897 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
898 | * client entry | |
899 | */ | |
900 | tt_global_entry->common.flags |= flags; | |
901 | ||
acd34afa SE |
902 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
903 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
904 | * delete + roaming change for this originator. |
905 | * | |
906 | * We should first delete the old originator before adding the | |
907 | * new one. | |
908 | */ | |
068ee6e2 | 909 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 910 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 911 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 912 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
913 | } |
914 | } | |
068ee6e2 | 915 | add_orig_entry: |
30cfd02b | 916 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 917 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 918 | |
39c75a51 | 919 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 920 | "Creating new global tt entry: %pM (via %pM)\n", |
068ee6e2 | 921 | common->addr, orig_node->orig); |
1e5d49fc | 922 | ret = true; |
c6c8fea2 | 923 | |
80b3f58c | 924 | out_remove: |
7f91d06c | 925 | |
a73105b8 | 926 | /* remove address from local hash if present */ |
7f91d06c AQ |
927 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, |
928 | "global tt received", | |
c1d07431 | 929 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
930 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
931 | ||
068ee6e2 AQ |
932 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
933 | /* this is a normal global add. Therefore the client is not in a | |
934 | * roaming state anymore. | |
935 | */ | |
936 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
937 | ||
7683fdc1 AQ |
938 | out: |
939 | if (tt_global_entry) | |
a513088d | 940 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
941 | if (tt_local_entry) |
942 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 943 | return ret; |
c6c8fea2 SE |
944 | } |
945 | ||
981d8900 SE |
946 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
947 | * @tt_global_entry: global translation table entry to be analyzed | |
948 | * | |
949 | * This functon assumes the caller holds rcu_read_lock(). | |
950 | * Returns best originator list entry or NULL on errors. | |
951 | */ | |
952 | static struct batadv_tt_orig_list_entry * | |
953 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) | |
954 | { | |
955 | struct batadv_neigh_node *router = NULL; | |
956 | struct hlist_head *head; | |
981d8900 SE |
957 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
958 | int best_tq = 0; | |
959 | ||
960 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 961 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
962 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
963 | if (!router) | |
964 | continue; | |
965 | ||
966 | if (router->tq_avg > best_tq) { | |
967 | best_entry = orig_entry; | |
968 | best_tq = router->tq_avg; | |
969 | } | |
970 | ||
971 | batadv_neigh_node_free_ref(router); | |
972 | } | |
973 | ||
974 | return best_entry; | |
975 | } | |
976 | ||
977 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
978 | * for this global entry | |
979 | * @tt_global_entry: global translation table entry to be printed | |
980 | * @seq: debugfs table seq_file struct | |
981 | * | |
982 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 983 | */ |
a513088d | 984 | static void |
56303d34 | 985 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 986 | struct seq_file *seq) |
db08e6e5 SW |
987 | { |
988 | struct hlist_head *head; | |
981d8900 | 989 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 990 | struct batadv_tt_common_entry *tt_common_entry; |
db08e6e5 SW |
991 | uint16_t flags; |
992 | uint8_t last_ttvn; | |
993 | ||
994 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
995 | flags = tt_common_entry->flags; |
996 | ||
997 | best_entry = batadv_transtable_best_orig(tt_global_entry); | |
998 | if (best_entry) { | |
999 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); | |
f9d8a537 | 1000 | seq_printf(seq, |
ced72933 | 1001 | " %c %pM (%3u) via %pM (%3u) (%#.8x) [%c%c%c]\n", |
981d8900 SE |
1002 | '*', tt_global_entry->common.addr, |
1003 | best_entry->ttvn, best_entry->orig_node->orig, | |
f9d8a537 | 1004 | last_ttvn, best_entry->orig_node->tt_crc, |
981d8900 SE |
1005 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1006 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1007 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
1008 | } | |
db08e6e5 SW |
1009 | |
1010 | head = &tt_global_entry->orig_list; | |
1011 | ||
b67bfe0d | 1012 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1013 | if (best_entry == orig_entry) |
1014 | continue; | |
1015 | ||
db08e6e5 | 1016 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
981d8900 SE |
1017 | seq_printf(seq, " %c %pM (%3u) via %pM (%3u) [%c%c%c]\n", |
1018 | '+', tt_global_entry->common.addr, | |
1019 | orig_entry->ttvn, orig_entry->orig_node->orig, | |
1020 | last_ttvn, | |
acd34afa | 1021 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1022 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1023 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
db08e6e5 SW |
1024 | } |
1025 | } | |
1026 | ||
08c36d3e | 1027 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1028 | { |
1029 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1030 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1031 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1032 | struct batadv_tt_common_entry *tt_common_entry; |
1033 | struct batadv_tt_global_entry *tt_global; | |
1034 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1035 | struct hlist_head *head; |
c90681b8 | 1036 | uint32_t i; |
c6c8fea2 | 1037 | |
30da63a6 ML |
1038 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1039 | if (!primary_if) | |
32ae9b22 | 1040 | goto out; |
c6c8fea2 | 1041 | |
2dafb49d AQ |
1042 | seq_printf(seq, |
1043 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1044 | net_dev->name); |
ced72933 | 1045 | seq_printf(seq, " %-13s %s %-15s %s (%-10s) %s\n", |
f9d8a537 AQ |
1046 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "CRC", |
1047 | "Flags"); | |
c6c8fea2 | 1048 | |
c6c8fea2 SE |
1049 | for (i = 0; i < hash->size; i++) { |
1050 | head = &hash->table[i]; | |
1051 | ||
7aadf889 | 1052 | rcu_read_lock(); |
b67bfe0d | 1053 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1054 | head, hash_entry) { |
56303d34 SE |
1055 | tt_global = container_of(tt_common_entry, |
1056 | struct batadv_tt_global_entry, | |
1057 | common); | |
1058 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 1059 | } |
7aadf889 | 1060 | rcu_read_unlock(); |
c6c8fea2 | 1061 | } |
32ae9b22 ML |
1062 | out: |
1063 | if (primary_if) | |
e5d89254 | 1064 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1065 | return 0; |
c6c8fea2 SE |
1066 | } |
1067 | ||
db08e6e5 | 1068 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1069 | static void |
56303d34 | 1070 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1071 | { |
db08e6e5 | 1072 | struct hlist_head *head; |
b67bfe0d | 1073 | struct hlist_node *safe; |
56303d34 | 1074 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1075 | |
db08e6e5 SW |
1076 | spin_lock_bh(&tt_global_entry->list_lock); |
1077 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1078 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1079 | hlist_del_rcu(&orig_entry->list); | |
a513088d | 1080 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1081 | } |
1082 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1083 | } |
1084 | ||
a513088d | 1085 | static void |
56303d34 SE |
1086 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1087 | struct batadv_tt_global_entry *tt_global_entry, | |
1088 | struct batadv_orig_node *orig_node, | |
a513088d | 1089 | const char *message) |
db08e6e5 SW |
1090 | { |
1091 | struct hlist_head *head; | |
b67bfe0d | 1092 | struct hlist_node *safe; |
56303d34 | 1093 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1094 | |
1095 | spin_lock_bh(&tt_global_entry->list_lock); | |
1096 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1097 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1098 | if (orig_entry->orig_node == orig_node) { |
39c75a51 | 1099 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1100 | "Deleting %pM from global tt entry %pM: %s\n", |
1101 | orig_node->orig, | |
1102 | tt_global_entry->common.addr, message); | |
b67bfe0d | 1103 | hlist_del_rcu(&orig_entry->list); |
a513088d | 1104 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1105 | } |
1106 | } | |
1107 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1108 | } | |
1109 | ||
db08e6e5 | 1110 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1111 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1112 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1113 | */ |
a513088d | 1114 | static void |
56303d34 SE |
1115 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1116 | struct batadv_tt_global_entry *tt_global_entry, | |
1117 | struct batadv_orig_node *orig_node, | |
1118 | const char *message) | |
db08e6e5 SW |
1119 | { |
1120 | bool last_entry = true; | |
1121 | struct hlist_head *head; | |
56303d34 | 1122 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1123 | |
1124 | /* no local entry exists, case 1: | |
1125 | * Check if this is the last one or if other entries exist. | |
1126 | */ | |
1127 | ||
1128 | rcu_read_lock(); | |
1129 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1130 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1131 | if (orig_entry->orig_node != orig_node) { |
1132 | last_entry = false; | |
1133 | break; | |
1134 | } | |
1135 | } | |
1136 | rcu_read_unlock(); | |
1137 | ||
1138 | if (last_entry) { | |
1139 | /* its the last one, mark for roaming. */ | |
acd34afa | 1140 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1141 | tt_global_entry->roam_at = jiffies; |
1142 | } else | |
1143 | /* there is another entry, we can simply delete this | |
1144 | * one and can still use the other one. | |
1145 | */ | |
a513088d SE |
1146 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1147 | orig_node, message); | |
db08e6e5 SW |
1148 | } |
1149 | ||
1150 | ||
1151 | ||
56303d34 SE |
1152 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1153 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1154 | const unsigned char *addr, |
1155 | const char *message, bool roaming) | |
a73105b8 | 1156 | { |
170173bf | 1157 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1158 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1159 | |
a513088d | 1160 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 1161 | if (!tt_global_entry) |
7683fdc1 | 1162 | goto out; |
a73105b8 | 1163 | |
db08e6e5 | 1164 | if (!roaming) { |
a513088d SE |
1165 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1166 | orig_node, message); | |
db08e6e5 SW |
1167 | |
1168 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1169 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1170 | message); | |
db08e6e5 SW |
1171 | |
1172 | goto out; | |
1173 | } | |
92f90f56 SE |
1174 | |
1175 | /* if we are deleting a global entry due to a roam | |
1176 | * event, there are two possibilities: | |
db08e6e5 SW |
1177 | * 1) the client roamed from node A to node B => if there |
1178 | * is only one originator left for this client, we mark | |
acd34afa | 1179 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1180 | * wait for node B to claim it. In case of timeout |
1181 | * the entry is purged. | |
db08e6e5 SW |
1182 | * |
1183 | * If there are other originators left, we directly delete | |
1184 | * the originator. | |
92f90f56 | 1185 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1186 | * the global entry, since it is useless now. |
1187 | */ | |
a513088d SE |
1188 | local_entry = batadv_tt_local_hash_find(bat_priv, |
1189 | tt_global_entry->common.addr); | |
1190 | if (local_entry) { | |
db08e6e5 | 1191 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1192 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1193 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1194 | } else |
1195 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1196 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1197 | orig_node, message); | |
92f90f56 | 1198 | |
92f90f56 | 1199 | |
cc47f66e | 1200 | out: |
7683fdc1 | 1201 | if (tt_global_entry) |
a513088d SE |
1202 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1203 | if (local_entry) | |
1204 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1205 | } |
1206 | ||
56303d34 SE |
1207 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1208 | struct batadv_orig_node *orig_node, | |
1209 | const char *message) | |
c6c8fea2 | 1210 | { |
56303d34 SE |
1211 | struct batadv_tt_global_entry *tt_global; |
1212 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1213 | uint32_t i; |
807736f6 | 1214 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1215 | struct hlist_node *safe; |
a73105b8 | 1216 | struct hlist_head *head; |
7683fdc1 | 1217 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 1218 | |
6e801494 SW |
1219 | if (!hash) |
1220 | return; | |
1221 | ||
a73105b8 AQ |
1222 | for (i = 0; i < hash->size; i++) { |
1223 | head = &hash->table[i]; | |
7683fdc1 | 1224 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1225 | |
7683fdc1 | 1226 | spin_lock_bh(list_lock); |
b67bfe0d | 1227 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1228 | head, hash_entry) { |
56303d34 SE |
1229 | tt_global = container_of(tt_common_entry, |
1230 | struct batadv_tt_global_entry, | |
1231 | common); | |
db08e6e5 | 1232 | |
56303d34 | 1233 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1234 | orig_node, message); |
db08e6e5 | 1235 | |
56303d34 | 1236 | if (hlist_empty(&tt_global->orig_list)) { |
39c75a51 | 1237 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1238 | "Deleting global tt entry %pM: %s\n", |
56303d34 | 1239 | tt_global->common.addr, message); |
b67bfe0d | 1240 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1241 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1242 | } |
a73105b8 | 1243 | } |
7683fdc1 | 1244 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1245 | } |
17071578 | 1246 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1247 | } |
1248 | ||
30cfd02b AQ |
1249 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1250 | char **msg) | |
cc47f66e | 1251 | { |
30cfd02b AQ |
1252 | bool purge = false; |
1253 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1254 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1255 | |
30cfd02b AQ |
1256 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1257 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1258 | purge = true; | |
1259 | *msg = "Roaming timeout\n"; | |
1260 | } | |
42d0b044 | 1261 | |
30cfd02b AQ |
1262 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1263 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1264 | purge = true; | |
1265 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1266 | } |
30cfd02b AQ |
1267 | |
1268 | return purge; | |
42d0b044 SE |
1269 | } |
1270 | ||
30cfd02b | 1271 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1272 | { |
807736f6 | 1273 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1274 | struct hlist_head *head; |
b67bfe0d | 1275 | struct hlist_node *node_tmp; |
7683fdc1 | 1276 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1277 | uint32_t i; |
30cfd02b AQ |
1278 | char *msg = NULL; |
1279 | struct batadv_tt_common_entry *tt_common; | |
1280 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1281 | |
cc47f66e AQ |
1282 | for (i = 0; i < hash->size; i++) { |
1283 | head = &hash->table[i]; | |
7683fdc1 | 1284 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1285 | |
7683fdc1 | 1286 | spin_lock_bh(list_lock); |
b67bfe0d | 1287 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1288 | hash_entry) { |
1289 | tt_global = container_of(tt_common, | |
1290 | struct batadv_tt_global_entry, | |
1291 | common); | |
1292 | ||
1293 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1294 | continue; | |
1295 | ||
1296 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
1297 | "Deleting global tt entry (%pM): %s\n", | |
1298 | tt_global->common.addr, msg); | |
1299 | ||
b67bfe0d | 1300 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1301 | |
1302 | batadv_tt_global_entry_free_ref(tt_global); | |
1303 | } | |
7683fdc1 | 1304 | spin_unlock_bh(list_lock); |
cc47f66e | 1305 | } |
cc47f66e AQ |
1306 | } |
1307 | ||
56303d34 | 1308 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1309 | { |
5bf74e9c | 1310 | struct batadv_hashtable *hash; |
7683fdc1 | 1311 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1312 | struct batadv_tt_common_entry *tt_common_entry; |
1313 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1314 | struct hlist_node *node_tmp; |
7683fdc1 | 1315 | struct hlist_head *head; |
c90681b8 | 1316 | uint32_t i; |
7683fdc1 | 1317 | |
807736f6 | 1318 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1319 | return; |
1320 | ||
807736f6 | 1321 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1322 | |
1323 | for (i = 0; i < hash->size; i++) { | |
1324 | head = &hash->table[i]; | |
1325 | list_lock = &hash->list_locks[i]; | |
1326 | ||
1327 | spin_lock_bh(list_lock); | |
b67bfe0d | 1328 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1329 | head, hash_entry) { |
b67bfe0d | 1330 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1331 | tt_global = container_of(tt_common_entry, |
1332 | struct batadv_tt_global_entry, | |
1333 | common); | |
1334 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1335 | } |
1336 | spin_unlock_bh(list_lock); | |
1337 | } | |
1338 | ||
1a8eaf07 | 1339 | batadv_hash_destroy(hash); |
7683fdc1 | 1340 | |
807736f6 | 1341 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1342 | } |
1343 | ||
56303d34 SE |
1344 | static bool |
1345 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1346 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1347 | { |
1348 | bool ret = false; | |
1349 | ||
acd34afa SE |
1350 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1351 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1352 | ret = true; |
1353 | ||
1354 | return ret; | |
1355 | } | |
1356 | ||
56303d34 SE |
1357 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1358 | const uint8_t *src, | |
1359 | const uint8_t *addr) | |
c6c8fea2 | 1360 | { |
56303d34 SE |
1361 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1362 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1363 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1364 | struct batadv_tt_orig_list_entry *best_entry; |
c6c8fea2 | 1365 | |
3d393e47 | 1366 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1367 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
068ee6e2 AQ |
1368 | if (!tt_local_entry || |
1369 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1370 | goto out; |
1371 | } | |
7aadf889 | 1372 | |
a513088d | 1373 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1374 | if (!tt_global_entry) |
7b36e8ee | 1375 | goto out; |
7aadf889 | 1376 | |
3d393e47 | 1377 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1378 | * isolation |
1379 | */ | |
a513088d SE |
1380 | if (tt_local_entry && |
1381 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1382 | goto out; |
1383 | ||
db08e6e5 | 1384 | rcu_read_lock(); |
981d8900 | 1385 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
db08e6e5 | 1386 | /* found anything? */ |
981d8900 SE |
1387 | if (best_entry) |
1388 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1389 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1390 | orig_node = NULL; | |
1391 | rcu_read_unlock(); | |
981d8900 | 1392 | |
7b36e8ee | 1393 | out: |
3d393e47 | 1394 | if (tt_global_entry) |
a513088d | 1395 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1396 | if (tt_local_entry) |
a513088d | 1397 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1398 | |
7b36e8ee | 1399 | return orig_node; |
c6c8fea2 | 1400 | } |
a73105b8 | 1401 | |
ced72933 AQ |
1402 | /** |
1403 | * batadv_tt_global_crc - calculates the checksum of the local table belonging | |
1404 | * to the given orig_node | |
1405 | * @bat_priv: the bat priv with all the soft interface information | |
1406 | */ | |
1407 | static uint32_t batadv_tt_global_crc(struct batadv_priv *bat_priv, | |
56303d34 | 1408 | struct batadv_orig_node *orig_node) |
a73105b8 | 1409 | { |
807736f6 | 1410 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1411 | struct batadv_tt_common_entry *tt_common; |
1412 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1413 | struct hlist_head *head; |
ced72933 | 1414 | uint32_t i, crc = 0; |
a73105b8 AQ |
1415 | |
1416 | for (i = 0; i < hash->size; i++) { | |
1417 | head = &hash->table[i]; | |
1418 | ||
1419 | rcu_read_lock(); | |
b67bfe0d | 1420 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1421 | tt_global = container_of(tt_common, |
1422 | struct batadv_tt_global_entry, | |
1423 | common); | |
db08e6e5 SW |
1424 | /* Roaming clients are in the global table for |
1425 | * consistency only. They don't have to be | |
1426 | * taken into account while computing the | |
1427 | * global crc | |
1428 | */ | |
acd34afa | 1429 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1430 | continue; |
30cfd02b AQ |
1431 | /* Temporary clients have not been announced yet, so |
1432 | * they have to be skipped while computing the global | |
1433 | * crc | |
1434 | */ | |
1435 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1436 | continue; | |
db08e6e5 SW |
1437 | |
1438 | /* find out if this global entry is announced by this | |
1439 | * originator | |
1440 | */ | |
56303d34 | 1441 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1442 | orig_node)) |
db08e6e5 SW |
1443 | continue; |
1444 | ||
ced72933 | 1445 | crc ^= crc32c(0, tt_common->addr, ETH_ALEN); |
a73105b8 AQ |
1446 | } |
1447 | rcu_read_unlock(); | |
1448 | } | |
1449 | ||
ced72933 | 1450 | return crc; |
a73105b8 AQ |
1451 | } |
1452 | ||
ced72933 AQ |
1453 | /** |
1454 | * batadv_tt_local_crc - calculates the checksum of the local table | |
1455 | * @bat_priv: the bat priv with all the soft interface information | |
1456 | */ | |
1457 | static uint32_t batadv_tt_local_crc(struct batadv_priv *bat_priv) | |
a73105b8 | 1458 | { |
807736f6 | 1459 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1460 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 1461 | struct hlist_head *head; |
ced72933 | 1462 | uint32_t i, crc = 0; |
a73105b8 AQ |
1463 | |
1464 | for (i = 0; i < hash->size; i++) { | |
1465 | head = &hash->table[i]; | |
1466 | ||
1467 | rcu_read_lock(); | |
b67bfe0d | 1468 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
058d0e26 | 1469 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1470 | * account while computing the CRC |
1471 | */ | |
acd34afa | 1472 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1473 | continue; |
ced72933 AQ |
1474 | |
1475 | crc ^= crc32c(0, tt_common->addr, ETH_ALEN); | |
a73105b8 | 1476 | } |
a73105b8 AQ |
1477 | rcu_read_unlock(); |
1478 | } | |
1479 | ||
ced72933 | 1480 | return crc; |
a73105b8 AQ |
1481 | } |
1482 | ||
56303d34 | 1483 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1484 | { |
56303d34 | 1485 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1486 | |
807736f6 | 1487 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1488 | |
807736f6 | 1489 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1490 | list_del(&node->list); |
1491 | kfree(node); | |
1492 | } | |
1493 | ||
807736f6 | 1494 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1495 | } |
1496 | ||
56303d34 SE |
1497 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1498 | struct batadv_orig_node *orig_node, | |
e8cf234a AQ |
1499 | const void *tt_buff, |
1500 | uint16_t tt_buff_len) | |
a73105b8 | 1501 | { |
a73105b8 | 1502 | /* Replace the old buffer only if I received something in the |
9cfc7bd6 SE |
1503 | * last OGM (the OGM could carry no changes) |
1504 | */ | |
a73105b8 AQ |
1505 | spin_lock_bh(&orig_node->tt_buff_lock); |
1506 | if (tt_buff_len > 0) { | |
1507 | kfree(orig_node->tt_buff); | |
1508 | orig_node->tt_buff_len = 0; | |
1509 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1510 | if (orig_node->tt_buff) { | |
1511 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1512 | orig_node->tt_buff_len = tt_buff_len; | |
1513 | } | |
1514 | } | |
1515 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1516 | } | |
1517 | ||
56303d34 | 1518 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1519 | { |
56303d34 | 1520 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1521 | |
807736f6 SE |
1522 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1523 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1524 | if (batadv_has_timed_out(node->issued_at, |
1525 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1526 | list_del(&node->list); |
1527 | kfree(node); | |
1528 | } | |
1529 | } | |
807736f6 | 1530 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1531 | } |
1532 | ||
1533 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1534 | * has already been issued for this orig_node, NULL otherwise |
1535 | */ | |
56303d34 SE |
1536 | static struct batadv_tt_req_node * |
1537 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1538 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1539 | { |
56303d34 | 1540 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 1541 | |
807736f6 SE |
1542 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1543 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
1544 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1545 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1546 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1547 | goto unlock; |
1548 | } | |
1549 | ||
1550 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1551 | if (!tt_req_node) | |
1552 | goto unlock; | |
1553 | ||
1554 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1555 | tt_req_node->issued_at = jiffies; | |
1556 | ||
807736f6 | 1557 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 1558 | unlock: |
807736f6 | 1559 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1560 | return tt_req_node; |
1561 | } | |
1562 | ||
335fbe0f ML |
1563 | /** |
1564 | * batadv_tt_local_valid - verify that given tt entry is a valid one | |
1565 | * @entry_ptr: to be checked local tt entry | |
1566 | * @data_ptr: not used but definition required to satisfy the callback prototype | |
1567 | * | |
1568 | * Returns 1 if the entry is a valid, 0 otherwise. | |
1569 | */ | |
1570 | static int batadv_tt_local_valid(const void *entry_ptr, const void *data_ptr) | |
058d0e26 | 1571 | { |
56303d34 | 1572 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1573 | |
acd34afa | 1574 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1575 | return 0; |
1576 | return 1; | |
1577 | } | |
1578 | ||
a513088d SE |
1579 | static int batadv_tt_global_valid(const void *entry_ptr, |
1580 | const void *data_ptr) | |
a73105b8 | 1581 | { |
56303d34 SE |
1582 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1583 | const struct batadv_tt_global_entry *tt_global_entry; | |
1584 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1585 | |
30cfd02b AQ |
1586 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
1587 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
1588 | return 0; |
1589 | ||
56303d34 SE |
1590 | tt_global_entry = container_of(tt_common_entry, |
1591 | struct batadv_tt_global_entry, | |
48100bac AQ |
1592 | common); |
1593 | ||
a513088d | 1594 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1595 | } |
1596 | ||
335fbe0f ML |
1597 | /** |
1598 | * batadv_tt_tvlv_generate - creates tvlv tt data buffer to fill it with the | |
1599 | * tt entries from the specified tt hash | |
1600 | * @bat_priv: the bat priv with all the soft interface information | |
1601 | * @hash: hash table containing the tt entries | |
1602 | * @tt_len: expected tvlv tt data buffer length in number of bytes | |
1603 | * @valid_cb: function to filter tt change entries | |
1604 | * @cb_data: data passed to the filter function as argument | |
1605 | * | |
1606 | * Returns pointer to allocated tvlv tt data buffer if operation was | |
1607 | * successful or NULL otherwise. | |
1608 | */ | |
1609 | static struct batadv_tvlv_tt_data * | |
1610 | batadv_tt_tvlv_generate(struct batadv_priv *bat_priv, | |
1611 | struct batadv_hashtable *hash, uint16_t tt_len, | |
1612 | int (*valid_cb)(const void *, const void *), | |
1613 | void *cb_data) | |
a73105b8 | 1614 | { |
56303d34 | 1615 | struct batadv_tt_common_entry *tt_common_entry; |
335fbe0f ML |
1616 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
1617 | struct batadv_tvlv_tt_change *tt_change; | |
a73105b8 | 1618 | struct hlist_head *head; |
335fbe0f ML |
1619 | uint16_t tt_tot, tt_num_entries = 0; |
1620 | ssize_t tvlv_tt_size = sizeof(struct batadv_tvlv_tt_data); | |
c90681b8 | 1621 | uint32_t i; |
a73105b8 | 1622 | |
335fbe0f ML |
1623 | if (tvlv_tt_size + tt_len > bat_priv->soft_iface->mtu) { |
1624 | tt_len = bat_priv->soft_iface->mtu - tvlv_tt_size; | |
1625 | tt_len -= tt_len % sizeof(struct batadv_tvlv_tt_change); | |
a73105b8 | 1626 | } |
a73105b8 | 1627 | |
298e6e68 | 1628 | tt_tot = batadv_tt_entries(tt_len); |
a73105b8 | 1629 | |
335fbe0f ML |
1630 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
1631 | GFP_ATOMIC); | |
1632 | if (!tvlv_tt_data) | |
1633 | goto out; | |
a73105b8 | 1634 | |
335fbe0f | 1635 | tt_change = (struct batadv_tvlv_tt_change *)(tvlv_tt_data + 1); |
a73105b8 AQ |
1636 | |
1637 | rcu_read_lock(); | |
1638 | for (i = 0; i < hash->size; i++) { | |
1639 | head = &hash->table[i]; | |
1640 | ||
b67bfe0d | 1641 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 | 1642 | head, hash_entry) { |
335fbe0f | 1643 | if (tt_tot == tt_num_entries) |
a73105b8 AQ |
1644 | break; |
1645 | ||
48100bac | 1646 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1647 | continue; |
1648 | ||
48100bac AQ |
1649 | memcpy(tt_change->addr, tt_common_entry->addr, |
1650 | ETH_ALEN); | |
27b37ebf | 1651 | tt_change->flags = tt_common_entry->flags; |
335fbe0f | 1652 | tt_change->reserved = 0; |
a73105b8 | 1653 | |
335fbe0f | 1654 | tt_num_entries++; |
a73105b8 AQ |
1655 | tt_change++; |
1656 | } | |
1657 | } | |
1658 | rcu_read_unlock(); | |
1659 | ||
1660 | out: | |
335fbe0f | 1661 | return tvlv_tt_data; |
a73105b8 AQ |
1662 | } |
1663 | ||
ced72933 AQ |
1664 | /** |
1665 | * batadv_send_tt_request - send a TT Request message to a given node | |
1666 | * @bat_priv: the bat priv with all the soft interface information | |
1667 | * @dst_orig_node: the destination of the message | |
1668 | * @ttvn: the version number that the source of the message is looking for | |
1669 | * @tt_crc: the CRC associated with the version number | |
1670 | * @full_table: ask for the entire translation table if true, while only for the | |
1671 | * last TT diff otherwise | |
1672 | */ | |
56303d34 SE |
1673 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1674 | struct batadv_orig_node *dst_orig_node, | |
ced72933 | 1675 | uint8_t ttvn, uint32_t tt_crc, |
a513088d | 1676 | bool full_table) |
a73105b8 | 1677 | { |
335fbe0f | 1678 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
56303d34 SE |
1679 | struct batadv_hard_iface *primary_if; |
1680 | struct batadv_tt_req_node *tt_req_node = NULL; | |
335fbe0f | 1681 | bool ret = false; |
a73105b8 | 1682 | |
e5d89254 | 1683 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1684 | if (!primary_if) |
1685 | goto out; | |
1686 | ||
1687 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1688 | * reply from the same orig_node yet |
1689 | */ | |
a513088d | 1690 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1691 | if (!tt_req_node) |
1692 | goto out; | |
1693 | ||
335fbe0f ML |
1694 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data), GFP_ATOMIC); |
1695 | if (!tvlv_tt_data) | |
a73105b8 AQ |
1696 | goto out; |
1697 | ||
335fbe0f ML |
1698 | tvlv_tt_data->flags = BATADV_TT_REQUEST; |
1699 | tvlv_tt_data->ttvn = ttvn; | |
ced72933 | 1700 | tvlv_tt_data->crc = htonl(tt_crc); |
a73105b8 AQ |
1701 | |
1702 | if (full_table) | |
335fbe0f | 1703 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1704 | |
bb351ba0 | 1705 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
335fbe0f | 1706 | dst_orig_node->orig, full_table ? 'F' : '.'); |
a73105b8 | 1707 | |
d69909d2 | 1708 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
335fbe0f ML |
1709 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
1710 | dst_orig_node->orig, BATADV_TVLV_TT, 1, | |
1711 | tvlv_tt_data, sizeof(*tvlv_tt_data)); | |
1712 | ret = true; | |
a73105b8 AQ |
1713 | |
1714 | out: | |
a73105b8 | 1715 | if (primary_if) |
e5d89254 | 1716 | batadv_hardif_free_ref(primary_if); |
a73105b8 | 1717 | if (ret && tt_req_node) { |
807736f6 | 1718 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1719 | list_del(&tt_req_node->list); |
807736f6 | 1720 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1721 | kfree(tt_req_node); |
1722 | } | |
335fbe0f | 1723 | kfree(tvlv_tt_data); |
a73105b8 AQ |
1724 | return ret; |
1725 | } | |
1726 | ||
335fbe0f ML |
1727 | /** |
1728 | * batadv_send_other_tt_response - send reply to tt request concerning another | |
1729 | * node's translation table | |
1730 | * @bat_priv: the bat priv with all the soft interface information | |
1731 | * @tt_data: tt data containing the tt request information | |
1732 | * @req_src: mac address of tt request sender | |
1733 | * @req_dst: mac address of tt request recipient | |
1734 | * | |
1735 | * Returns true if tt request reply was sent, false otherwise. | |
1736 | */ | |
1737 | static bool batadv_send_other_tt_response(struct batadv_priv *bat_priv, | |
1738 | struct batadv_tvlv_tt_data *tt_data, | |
1739 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 1740 | { |
170173bf | 1741 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 1742 | struct batadv_orig_node *res_dst_orig_node = NULL; |
335fbe0f ML |
1743 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
1744 | uint8_t orig_ttvn, req_ttvn; | |
1745 | uint16_t tt_len; | |
1746 | bool ret = false, full_table; | |
a73105b8 | 1747 | |
39c75a51 | 1748 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1749 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
335fbe0f ML |
1750 | req_src, tt_data->ttvn, req_dst, |
1751 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
1752 | |
1753 | /* Let's get the orig node of the REAL destination */ | |
335fbe0f | 1754 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, req_dst); |
a73105b8 AQ |
1755 | if (!req_dst_orig_node) |
1756 | goto out; | |
1757 | ||
335fbe0f | 1758 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
1759 | if (!res_dst_orig_node) |
1760 | goto out; | |
1761 | ||
a73105b8 | 1762 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
335fbe0f | 1763 | req_ttvn = tt_data->ttvn; |
a73105b8 | 1764 | |
335fbe0f | 1765 | /* this node doesn't have the requested data */ |
a73105b8 | 1766 | if (orig_ttvn != req_ttvn || |
ced72933 | 1767 | tt_data->crc != htonl(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1768 | goto out; |
1769 | ||
015758d0 | 1770 | /* If the full table has been explicitly requested */ |
335fbe0f | 1771 | if (tt_data->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1772 | !req_dst_orig_node->tt_buff) |
1773 | full_table = true; | |
1774 | else | |
1775 | full_table = false; | |
1776 | ||
335fbe0f ML |
1777 | /* TT fragmentation hasn't been implemented yet, so send as many |
1778 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 1779 | */ |
a73105b8 AQ |
1780 | if (!full_table) { |
1781 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1782 | tt_len = req_dst_orig_node->tt_buff_len; | |
a73105b8 | 1783 | |
335fbe0f ML |
1784 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
1785 | GFP_ATOMIC); | |
1786 | if (!tvlv_tt_data) | |
a73105b8 AQ |
1787 | goto unlock; |
1788 | ||
a73105b8 | 1789 | /* Copy the last orig_node's OGM buffer */ |
335fbe0f | 1790 | memcpy(tvlv_tt_data + 1, req_dst_orig_node->tt_buff, |
a73105b8 | 1791 | req_dst_orig_node->tt_buff_len); |
a73105b8 AQ |
1792 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); |
1793 | } else { | |
96412690 | 1794 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
335fbe0f ML |
1795 | tt_len = batadv_tt_len(tt_len); |
1796 | ||
1797 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, | |
1798 | bat_priv->tt.global_hash, | |
1799 | tt_len, | |
1800 | batadv_tt_global_valid, | |
1801 | req_dst_orig_node); | |
1802 | if (!tvlv_tt_data) | |
a73105b8 | 1803 | goto out; |
a73105b8 AQ |
1804 | } |
1805 | ||
335fbe0f ML |
1806 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
1807 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
1808 | |
1809 | if (full_table) | |
335fbe0f | 1810 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1811 | |
39c75a51 | 1812 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
1813 | "Sending TT_RESPONSE %pM for %pM [%c] (ttvn: %u)\n", |
1814 | res_dst_orig_node->orig, req_dst_orig_node->orig, | |
1815 | full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 1816 | |
d69909d2 | 1817 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1818 | |
335fbe0f ML |
1819 | batadv_tvlv_unicast_send(bat_priv, req_dst_orig_node->orig, |
1820 | req_src, BATADV_TVLV_TT, 1, | |
1821 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); | |
e91ecfc6 | 1822 | |
335fbe0f | 1823 | ret = true; |
a73105b8 AQ |
1824 | goto out; |
1825 | ||
1826 | unlock: | |
1827 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1828 | ||
1829 | out: | |
1830 | if (res_dst_orig_node) | |
7d211efc | 1831 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1832 | if (req_dst_orig_node) |
7d211efc | 1833 | batadv_orig_node_free_ref(req_dst_orig_node); |
335fbe0f | 1834 | kfree(tvlv_tt_data); |
a73105b8 | 1835 | return ret; |
a73105b8 | 1836 | } |
96412690 | 1837 | |
335fbe0f ML |
1838 | /** |
1839 | * batadv_send_my_tt_response - send reply to tt request concerning this node's | |
1840 | * translation table | |
1841 | * @bat_priv: the bat priv with all the soft interface information | |
1842 | * @tt_data: tt data containing the tt request information | |
1843 | * @req_src: mac address of tt request sender | |
1844 | * | |
1845 | * Returns true if tt request reply was sent, false otherwise. | |
1846 | */ | |
1847 | static bool batadv_send_my_tt_response(struct batadv_priv *bat_priv, | |
1848 | struct batadv_tvlv_tt_data *tt_data, | |
1849 | uint8_t *req_src) | |
a73105b8 | 1850 | { |
335fbe0f | 1851 | struct batadv_tvlv_tt_data *tvlv_tt_data = NULL; |
170173bf | 1852 | struct batadv_orig_node *orig_node; |
56303d34 | 1853 | struct batadv_hard_iface *primary_if = NULL; |
335fbe0f | 1854 | uint8_t my_ttvn, req_ttvn; |
a73105b8 | 1855 | bool full_table; |
335fbe0f | 1856 | uint16_t tt_len; |
a73105b8 | 1857 | |
39c75a51 | 1858 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1859 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
335fbe0f ML |
1860 | req_src, tt_data->ttvn, |
1861 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
1862 | |
1863 | ||
807736f6 | 1864 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
335fbe0f | 1865 | req_ttvn = tt_data->ttvn; |
a73105b8 | 1866 | |
335fbe0f | 1867 | orig_node = batadv_orig_hash_find(bat_priv, req_src); |
a73105b8 AQ |
1868 | if (!orig_node) |
1869 | goto out; | |
1870 | ||
e5d89254 | 1871 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1872 | if (!primary_if) |
1873 | goto out; | |
1874 | ||
1875 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1876 | * is too big send the whole local translation table |
1877 | */ | |
335fbe0f | 1878 | if (tt_data->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 1879 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
1880 | full_table = true; |
1881 | else | |
1882 | full_table = false; | |
1883 | ||
335fbe0f ML |
1884 | /* TT fragmentation hasn't been implemented yet, so send as many |
1885 | * TT entries fit a single packet as possible only | |
9cfc7bd6 | 1886 | */ |
a73105b8 | 1887 | if (!full_table) { |
807736f6 SE |
1888 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1889 | tt_len = bat_priv->tt.last_changeset_len; | |
a73105b8 | 1890 | |
335fbe0f ML |
1891 | tvlv_tt_data = kzalloc(sizeof(*tvlv_tt_data) + tt_len, |
1892 | GFP_ATOMIC); | |
1893 | if (!tvlv_tt_data) | |
a73105b8 AQ |
1894 | goto unlock; |
1895 | ||
335fbe0f ML |
1896 | /* Copy the last orig_node's OGM buffer */ |
1897 | memcpy(tvlv_tt_data + 1, bat_priv->tt.last_changeset, | |
807736f6 SE |
1898 | bat_priv->tt.last_changeset_len); |
1899 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 1900 | } else { |
807736f6 | 1901 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
335fbe0f ML |
1902 | tt_len = batadv_tt_len(tt_len); |
1903 | req_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); | |
1904 | ||
1905 | tvlv_tt_data = batadv_tt_tvlv_generate(bat_priv, | |
1906 | bat_priv->tt.local_hash, | |
1907 | tt_len, | |
1908 | batadv_tt_local_valid, | |
1909 | NULL); | |
1910 | if (!tvlv_tt_data) | |
a73105b8 | 1911 | goto out; |
a73105b8 AQ |
1912 | } |
1913 | ||
335fbe0f ML |
1914 | tvlv_tt_data->flags = BATADV_TT_RESPONSE; |
1915 | tvlv_tt_data->ttvn = req_ttvn; | |
a73105b8 AQ |
1916 | |
1917 | if (full_table) | |
335fbe0f | 1918 | tvlv_tt_data->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1919 | |
39c75a51 | 1920 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
335fbe0f ML |
1921 | "Sending TT_RESPONSE to %pM [%c] (ttvn: %u)\n", |
1922 | orig_node->orig, full_table ? 'F' : '.', req_ttvn); | |
a73105b8 | 1923 | |
d69909d2 | 1924 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1925 | |
335fbe0f ML |
1926 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, |
1927 | req_src, BATADV_TVLV_TT, 1, | |
1928 | tvlv_tt_data, sizeof(*tvlv_tt_data) + tt_len); | |
1929 | ||
a73105b8 AQ |
1930 | goto out; |
1931 | ||
1932 | unlock: | |
807736f6 | 1933 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 AQ |
1934 | out: |
1935 | if (orig_node) | |
7d211efc | 1936 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1937 | if (primary_if) |
e5d89254 | 1938 | batadv_hardif_free_ref(primary_if); |
335fbe0f ML |
1939 | kfree(tvlv_tt_data); |
1940 | /* The packet was for this host, so it doesn't need to be re-routed */ | |
a73105b8 AQ |
1941 | return true; |
1942 | } | |
1943 | ||
335fbe0f ML |
1944 | /** |
1945 | * batadv_send_tt_response - send reply to tt request | |
1946 | * @bat_priv: the bat priv with all the soft interface information | |
1947 | * @tt_data: tt data containing the tt request information | |
1948 | * @req_src: mac address of tt request sender | |
1949 | * @req_dst: mac address of tt request recipient | |
1950 | * | |
1951 | * Returns true if tt request reply was sent, false otherwise. | |
1952 | */ | |
1953 | static bool batadv_send_tt_response(struct batadv_priv *bat_priv, | |
1954 | struct batadv_tvlv_tt_data *tt_data, | |
1955 | uint8_t *req_src, uint8_t *req_dst) | |
a73105b8 | 1956 | { |
335fbe0f | 1957 | if (batadv_is_my_mac(bat_priv, req_dst)) { |
20ff9d59 | 1958 | /* don't answer backbone gws! */ |
335fbe0f | 1959 | if (batadv_bla_is_backbone_gw_orig(bat_priv, req_src)) |
20ff9d59 SW |
1960 | return true; |
1961 | ||
335fbe0f | 1962 | return batadv_send_my_tt_response(bat_priv, tt_data, req_src); |
20ff9d59 | 1963 | } else { |
335fbe0f ML |
1964 | return batadv_send_other_tt_response(bat_priv, tt_data, |
1965 | req_src, req_dst); | |
20ff9d59 | 1966 | } |
a73105b8 AQ |
1967 | } |
1968 | ||
56303d34 SE |
1969 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1970 | struct batadv_orig_node *orig_node, | |
335fbe0f | 1971 | struct batadv_tvlv_tt_change *tt_change, |
a513088d | 1972 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
1973 | { |
1974 | int i; | |
a513088d | 1975 | int roams; |
a73105b8 AQ |
1976 | |
1977 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
1978 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
1979 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
1980 | batadv_tt_global_del(bat_priv, orig_node, |
1981 | (tt_change + i)->addr, | |
d4f44692 AQ |
1982 | "tt removed by changes", |
1983 | roams); | |
08c36d3e | 1984 | } else { |
08c36d3e | 1985 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 AQ |
1986 | (tt_change + i)->addr, |
1987 | (tt_change + i)->flags, ttvn)) | |
a73105b8 AQ |
1988 | /* In case of problem while storing a |
1989 | * global_entry, we stop the updating | |
1990 | * procedure without committing the | |
1991 | * ttvn change. This will avoid to send | |
1992 | * corrupted data on tt_request | |
1993 | */ | |
1994 | return; | |
08c36d3e | 1995 | } |
a73105b8 | 1996 | } |
17071578 | 1997 | orig_node->tt_initialised = true; |
a73105b8 AQ |
1998 | } |
1999 | ||
56303d34 | 2000 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
335fbe0f ML |
2001 | struct batadv_tvlv_tt_data *tt_data, |
2002 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2003 | { |
170173bf | 2004 | struct batadv_orig_node *orig_node; |
a73105b8 | 2005 | |
335fbe0f | 2006 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2007 | if (!orig_node) |
2008 | goto out; | |
2009 | ||
2010 | /* Purge the old table first.. */ | |
08c36d3e | 2011 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 2012 | |
a513088d | 2013 | _batadv_tt_update_changes(bat_priv, orig_node, |
335fbe0f ML |
2014 | (struct batadv_tvlv_tt_change *)(tt_data + 1), |
2015 | num_entries, tt_data->ttvn); | |
a73105b8 AQ |
2016 | |
2017 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2018 | kfree(orig_node->tt_buff); | |
2019 | orig_node->tt_buff_len = 0; | |
2020 | orig_node->tt_buff = NULL; | |
2021 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2022 | ||
335fbe0f | 2023 | atomic_set(&orig_node->last_ttvn, tt_data->ttvn); |
a73105b8 AQ |
2024 | |
2025 | out: | |
2026 | if (orig_node) | |
7d211efc | 2027 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2028 | } |
2029 | ||
56303d34 SE |
2030 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2031 | struct batadv_orig_node *orig_node, | |
a513088d | 2032 | uint16_t tt_num_changes, uint8_t ttvn, |
335fbe0f | 2033 | struct batadv_tvlv_tt_change *tt_change) |
a73105b8 | 2034 | { |
a513088d SE |
2035 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2036 | tt_num_changes, ttvn); | |
a73105b8 | 2037 | |
e8cf234a AQ |
2038 | batadv_tt_save_orig_buffer(bat_priv, orig_node, tt_change, |
2039 | batadv_tt_len(tt_num_changes)); | |
a73105b8 AQ |
2040 | atomic_set(&orig_node->last_ttvn, ttvn); |
2041 | } | |
2042 | ||
56303d34 | 2043 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 2044 | { |
170173bf | 2045 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2046 | bool ret = false; |
a73105b8 | 2047 | |
a513088d | 2048 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
2049 | if (!tt_local_entry) |
2050 | goto out; | |
058d0e26 | 2051 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2052 | * consistency purpose) |
2053 | */ | |
7c1fd91d AQ |
2054 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2055 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2056 | goto out; |
7683fdc1 AQ |
2057 | ret = true; |
2058 | out: | |
a73105b8 | 2059 | if (tt_local_entry) |
a513088d | 2060 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2061 | return ret; |
a73105b8 AQ |
2062 | } |
2063 | ||
335fbe0f ML |
2064 | /** |
2065 | * batadv_handle_tt_response - process incoming tt reply | |
2066 | * @bat_priv: the bat priv with all the soft interface information | |
2067 | * @tt_data: tt data containing the tt request information | |
2068 | * @resp_src: mac address of tt reply sender | |
2069 | * @num_entries: number of tt change entries appended to the tt data | |
2070 | */ | |
2071 | static void batadv_handle_tt_response(struct batadv_priv *bat_priv, | |
2072 | struct batadv_tvlv_tt_data *tt_data, | |
2073 | uint8_t *resp_src, uint16_t num_entries) | |
a73105b8 | 2074 | { |
56303d34 SE |
2075 | struct batadv_tt_req_node *node, *safe; |
2076 | struct batadv_orig_node *orig_node = NULL; | |
335fbe0f | 2077 | struct batadv_tvlv_tt_change *tt_change; |
a73105b8 | 2078 | |
39c75a51 | 2079 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2080 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
335fbe0f ML |
2081 | resp_src, tt_data->ttvn, num_entries, |
2082 | (tt_data->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 2083 | |
20ff9d59 | 2084 | /* we should have never asked a backbone gw */ |
335fbe0f | 2085 | if (batadv_bla_is_backbone_gw_orig(bat_priv, resp_src)) |
20ff9d59 SW |
2086 | goto out; |
2087 | ||
335fbe0f | 2088 | orig_node = batadv_orig_hash_find(bat_priv, resp_src); |
a73105b8 AQ |
2089 | if (!orig_node) |
2090 | goto out; | |
2091 | ||
335fbe0f ML |
2092 | if (tt_data->flags & BATADV_TT_FULL_TABLE) { |
2093 | batadv_tt_fill_gtable(bat_priv, tt_data, resp_src, num_entries); | |
96412690 | 2094 | } else { |
335fbe0f ML |
2095 | tt_change = (struct batadv_tvlv_tt_change *)(tt_data + 1); |
2096 | batadv_tt_update_changes(bat_priv, orig_node, num_entries, | |
2097 | tt_data->ttvn, tt_change); | |
96412690 | 2098 | } |
a73105b8 AQ |
2099 | |
2100 | /* Delete the tt_req_node from pending tt_requests list */ | |
807736f6 SE |
2101 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2102 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
335fbe0f | 2103 | if (!batadv_compare_eth(node->addr, resp_src)) |
a73105b8 AQ |
2104 | continue; |
2105 | list_del(&node->list); | |
2106 | kfree(node); | |
2107 | } | |
807736f6 | 2108 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2109 | |
2110 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 2111 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a73105b8 AQ |
2112 | out: |
2113 | if (orig_node) | |
7d211efc | 2114 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2115 | } |
2116 | ||
56303d34 | 2117 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2118 | { |
56303d34 | 2119 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2120 | |
807736f6 | 2121 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2122 | |
807736f6 | 2123 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2124 | list_del(&node->list); |
2125 | kfree(node); | |
2126 | } | |
2127 | ||
807736f6 | 2128 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2129 | } |
2130 | ||
56303d34 | 2131 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2132 | { |
56303d34 | 2133 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2134 | |
807736f6 SE |
2135 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2136 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2137 | if (!batadv_has_timed_out(node->first_time, |
2138 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2139 | continue; |
2140 | ||
2141 | list_del(&node->list); | |
2142 | kfree(node); | |
2143 | } | |
807736f6 | 2144 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2145 | } |
2146 | ||
2147 | /* This function checks whether the client already reached the | |
2148 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2149 | * will not be sent. | |
2150 | * | |
9cfc7bd6 SE |
2151 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2152 | */ | |
56303d34 | 2153 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2154 | uint8_t *client) |
cc47f66e | 2155 | { |
56303d34 | 2156 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2157 | bool ret = false; |
2158 | ||
807736f6 | 2159 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2160 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2161 | * reply from the same orig_node yet |
2162 | */ | |
807736f6 | 2163 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2164 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2165 | continue; |
2166 | ||
1eda58bf | 2167 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2168 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2169 | continue; |
2170 | ||
3e34819e | 2171 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2172 | /* Sorry, you roamed too many times! */ |
2173 | goto unlock; | |
2174 | ret = true; | |
2175 | break; | |
2176 | } | |
2177 | ||
2178 | if (!ret) { | |
2179 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2180 | if (!tt_roam_node) | |
2181 | goto unlock; | |
2182 | ||
2183 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2184 | atomic_set(&tt_roam_node->counter, |
2185 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2186 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2187 | ||
807736f6 | 2188 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2189 | ret = true; |
2190 | } | |
2191 | ||
2192 | unlock: | |
807736f6 | 2193 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2194 | return ret; |
2195 | } | |
2196 | ||
56303d34 SE |
2197 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
2198 | struct batadv_orig_node *orig_node) | |
cc47f66e | 2199 | { |
56303d34 | 2200 | struct batadv_hard_iface *primary_if; |
122edaa0 ML |
2201 | struct batadv_tvlv_roam_adv tvlv_roam; |
2202 | ||
2203 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
2204 | if (!primary_if) | |
2205 | goto out; | |
cc47f66e AQ |
2206 | |
2207 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2208 | * already roamed to us too many times |
2209 | */ | |
a513088d | 2210 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2211 | goto out; |
2212 | ||
39c75a51 | 2213 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
2214 | "Sending ROAMING_ADV to %pM (client %pM)\n", |
2215 | orig_node->orig, client); | |
cc47f66e | 2216 | |
d69909d2 | 2217 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2218 | |
122edaa0 ML |
2219 | memcpy(tvlv_roam.client, client, sizeof(tvlv_roam.client)); |
2220 | tvlv_roam.reserved = 0; | |
2221 | ||
2222 | batadv_tvlv_unicast_send(bat_priv, primary_if->net_dev->dev_addr, | |
2223 | orig_node->orig, BATADV_TVLV_ROAM, 1, | |
2224 | &tvlv_roam, sizeof(tvlv_roam)); | |
cc47f66e AQ |
2225 | |
2226 | out: | |
122edaa0 ML |
2227 | if (primary_if) |
2228 | batadv_hardif_free_ref(primary_if); | |
a73105b8 AQ |
2229 | } |
2230 | ||
a513088d | 2231 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2232 | { |
56303d34 | 2233 | struct delayed_work *delayed_work; |
807736f6 | 2234 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2235 | struct batadv_priv *bat_priv; |
2236 | ||
2237 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2238 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2239 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2240 | |
a513088d | 2241 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2242 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2243 | batadv_tt_req_purge(bat_priv); |
2244 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2245 | |
72414442 AQ |
2246 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2247 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2248 | } |
cc47f66e | 2249 | |
56303d34 | 2250 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2251 | { |
e1bf0c14 ML |
2252 | batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_TT, 1); |
2253 | batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_TT, 1); | |
2254 | ||
807736f6 | 2255 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2256 | |
a513088d SE |
2257 | batadv_tt_local_table_free(bat_priv); |
2258 | batadv_tt_global_table_free(bat_priv); | |
2259 | batadv_tt_req_list_free(bat_priv); | |
2260 | batadv_tt_changes_list_free(bat_priv); | |
2261 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2262 | |
807736f6 | 2263 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2264 | } |
058d0e26 | 2265 | |
697f2531 | 2266 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2267 | * in the given hash table and returns the number of modified entries |
2268 | */ | |
5bf74e9c SE |
2269 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2270 | uint16_t flags, bool enable) | |
058d0e26 | 2271 | { |
c90681b8 | 2272 | uint32_t i; |
697f2531 | 2273 | uint16_t changed_num = 0; |
058d0e26 | 2274 | struct hlist_head *head; |
56303d34 | 2275 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2276 | |
2277 | if (!hash) | |
697f2531 | 2278 | goto out; |
058d0e26 AQ |
2279 | |
2280 | for (i = 0; i < hash->size; i++) { | |
2281 | head = &hash->table[i]; | |
2282 | ||
2283 | rcu_read_lock(); | |
b67bfe0d | 2284 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2285 | head, hash_entry) { |
697f2531 AQ |
2286 | if (enable) { |
2287 | if ((tt_common_entry->flags & flags) == flags) | |
2288 | continue; | |
2289 | tt_common_entry->flags |= flags; | |
2290 | } else { | |
2291 | if (!(tt_common_entry->flags & flags)) | |
2292 | continue; | |
2293 | tt_common_entry->flags &= ~flags; | |
2294 | } | |
2295 | changed_num++; | |
058d0e26 AQ |
2296 | } |
2297 | rcu_read_unlock(); | |
2298 | } | |
697f2531 AQ |
2299 | out: |
2300 | return changed_num; | |
058d0e26 AQ |
2301 | } |
2302 | ||
acd34afa | 2303 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2304 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2305 | { |
807736f6 | 2306 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2307 | struct batadv_tt_common_entry *tt_common; |
2308 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 2309 | struct hlist_node *node_tmp; |
058d0e26 AQ |
2310 | struct hlist_head *head; |
2311 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2312 | uint32_t i; |
058d0e26 AQ |
2313 | |
2314 | if (!hash) | |
2315 | return; | |
2316 | ||
2317 | for (i = 0; i < hash->size; i++) { | |
2318 | head = &hash->table[i]; | |
2319 | list_lock = &hash->list_locks[i]; | |
2320 | ||
2321 | spin_lock_bh(list_lock); | |
b67bfe0d | 2322 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
2323 | hash_entry) { |
2324 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2325 | continue; |
2326 | ||
39c75a51 | 2327 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2328 | "Deleting local tt entry (%pM): pending\n", |
acd34afa | 2329 | tt_common->addr); |
058d0e26 | 2330 | |
807736f6 | 2331 | atomic_dec(&bat_priv->tt.local_entry_num); |
b67bfe0d | 2332 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
2333 | tt_local = container_of(tt_common, |
2334 | struct batadv_tt_local_entry, | |
2335 | common); | |
2336 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2337 | } |
2338 | spin_unlock_bh(list_lock); | |
2339 | } | |
058d0e26 AQ |
2340 | } |
2341 | ||
e1bf0c14 ML |
2342 | /** |
2343 | * batadv_tt_local_commit_changes - commit all pending local tt changes which | |
2344 | * have been queued in the time since the last commit | |
2345 | * @bat_priv: the bat priv with all the soft interface information | |
2346 | */ | |
2347 | void batadv_tt_local_commit_changes(struct batadv_priv *bat_priv) | |
058d0e26 | 2348 | { |
be9aa4c1 ML |
2349 | uint16_t changed_num = 0; |
2350 | ||
e1bf0c14 ML |
2351 | if (atomic_read(&bat_priv->tt.local_changes) < 1) { |
2352 | if (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt)) | |
2353 | batadv_tt_tvlv_container_update(bat_priv); | |
2354 | return; | |
2355 | } | |
be9aa4c1 | 2356 | |
807736f6 | 2357 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
acd34afa | 2358 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2359 | |
2360 | /* all reset entries have to be counted as local entries */ | |
807736f6 | 2361 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
a513088d | 2362 | batadv_tt_local_purge_pending_clients(bat_priv); |
807736f6 | 2363 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2364 | |
2365 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2366 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2367 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2368 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2369 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2370 | |
2371 | /* reset the sending counter */ | |
807736f6 | 2372 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
e1bf0c14 | 2373 | batadv_tt_tvlv_container_update(bat_priv); |
058d0e26 | 2374 | } |
59b699cd | 2375 | |
56303d34 | 2376 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
08c36d3e | 2377 | uint8_t *dst) |
59b699cd | 2378 | { |
56303d34 SE |
2379 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2380 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2381 | bool ret = false; |
59b699cd AQ |
2382 | |
2383 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2384 | goto out; |
59b699cd | 2385 | |
a513088d | 2386 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2387 | if (!tt_local_entry) |
2388 | goto out; | |
2389 | ||
a513088d | 2390 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2391 | if (!tt_global_entry) |
2392 | goto out; | |
2393 | ||
1f129fef | 2394 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2395 | goto out; |
2396 | ||
5870adc6 | 2397 | ret = true; |
59b699cd AQ |
2398 | |
2399 | out: | |
2400 | if (tt_global_entry) | |
a513088d | 2401 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2402 | if (tt_local_entry) |
a513088d | 2403 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2404 | return ret; |
2405 | } | |
a943cac1 | 2406 | |
e1bf0c14 ML |
2407 | /** |
2408 | * batadv_tt_update_orig - update global translation table with new tt | |
2409 | * information received via ogms | |
2410 | * @bat_priv: the bat priv with all the soft interface information | |
2411 | * @orig: the orig_node of the ogm | |
2412 | * @tt_buff: buffer holding the tt information | |
2413 | * @tt_num_changes: number of tt changes inside the tt buffer | |
2414 | * @ttvn: translation table version number of this changeset | |
ced72933 | 2415 | * @tt_crc: crc32 checksum of orig node's translation table |
e1bf0c14 ML |
2416 | */ |
2417 | static void batadv_tt_update_orig(struct batadv_priv *bat_priv, | |
2418 | struct batadv_orig_node *orig_node, | |
2419 | const unsigned char *tt_buff, | |
2420 | uint16_t tt_num_changes, uint8_t ttvn, | |
ced72933 | 2421 | uint32_t tt_crc) |
a943cac1 ML |
2422 | { |
2423 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2424 | bool full_table = true; | |
335fbe0f | 2425 | struct batadv_tvlv_tt_change *tt_change; |
a943cac1 | 2426 | |
20ff9d59 | 2427 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2428 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2429 | return; |
2430 | ||
17071578 | 2431 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2432 | * increased by one -> we can apply the attached changes |
2433 | */ | |
17071578 AQ |
2434 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2435 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2436 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2437 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2438 | * times. | |
9cfc7bd6 SE |
2439 | * In this case send a tt request |
2440 | */ | |
a943cac1 ML |
2441 | if (!tt_num_changes) { |
2442 | full_table = false; | |
2443 | goto request_table; | |
2444 | } | |
2445 | ||
335fbe0f | 2446 | tt_change = (struct batadv_tvlv_tt_change *)tt_buff; |
a513088d | 2447 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2448 | ttvn, tt_change); |
a943cac1 ML |
2449 | |
2450 | /* Even if we received the precomputed crc with the OGM, we | |
2451 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2452 | * in the global table |
2453 | */ | |
a513088d | 2454 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2455 | |
2456 | /* The ttvn alone is not enough to guarantee consistency | |
2457 | * because a single value could represent different states | |
2458 | * (due to the wrap around). Thus a node has to check whether | |
2459 | * the resulting table (after applying the changes) is still | |
2460 | * consistent or not. E.g. a node could disconnect while its | |
2461 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2462 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2463 | * inconsistency |
2464 | */ | |
a943cac1 ML |
2465 | if (orig_node->tt_crc != tt_crc) |
2466 | goto request_table; | |
a943cac1 ML |
2467 | } else { |
2468 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2469 | * in sync anymore -> request fresh tt data |
2470 | */ | |
17071578 AQ |
2471 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2472 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2473 | request_table: |
39c75a51 | 2474 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
ced72933 | 2475 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %#.8x last_crc: %#.8x num_changes: %u)\n", |
1eda58bf SE |
2476 | orig_node->orig, ttvn, orig_ttvn, tt_crc, |
2477 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2478 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2479 | tt_crc, full_table); | |
a943cac1 ML |
2480 | return; |
2481 | } | |
2482 | } | |
2483 | } | |
3275e7cc AQ |
2484 | |
2485 | /* returns true whether we know that the client has moved from its old | |
2486 | * originator to another one. This entry is kept is still kept for consistency | |
2487 | * purposes | |
2488 | */ | |
56303d34 | 2489 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
08c36d3e | 2490 | uint8_t *addr) |
3275e7cc | 2491 | { |
56303d34 | 2492 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2493 | bool ret = false; |
2494 | ||
a513088d | 2495 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2496 | if (!tt_global_entry) |
2497 | goto out; | |
2498 | ||
c1d07431 | 2499 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 2500 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2501 | out: |
2502 | return ret; | |
2503 | } | |
30cfd02b | 2504 | |
7c1fd91d AQ |
2505 | /** |
2506 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
2507 | * @bat_priv: the bat priv with all the soft interface information | |
2508 | * @addr: the MAC address of the local client to query | |
2509 | * | |
2510 | * Returns true if the local client is known to be roaming (it is not served by | |
2511 | * this node anymore) or not. If yes, the client is still present in the table | |
2512 | * to keep the latter consistent with the node TTVN | |
2513 | */ | |
2514 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
2515 | uint8_t *addr) | |
2516 | { | |
2517 | struct batadv_tt_local_entry *tt_local_entry; | |
2518 | bool ret = false; | |
2519 | ||
2520 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); | |
2521 | if (!tt_local_entry) | |
2522 | goto out; | |
2523 | ||
2524 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
2525 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
2526 | out: | |
2527 | return ret; | |
7c1fd91d AQ |
2528 | } |
2529 | ||
30cfd02b AQ |
2530 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
2531 | struct batadv_orig_node *orig_node, | |
2532 | const unsigned char *addr) | |
2533 | { | |
2534 | bool ret = false; | |
2535 | ||
1f36aebc AQ |
2536 | /* if the originator is a backbone node (meaning it belongs to the same |
2537 | * LAN of this node) the temporary client must not be added because to | |
2538 | * reach such destination the node must use the LAN instead of the mesh | |
2539 | */ | |
2540 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) | |
2541 | goto out; | |
2542 | ||
30cfd02b AQ |
2543 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, |
2544 | BATADV_TT_CLIENT_TEMP, | |
2545 | atomic_read(&orig_node->last_ttvn))) | |
2546 | goto out; | |
2547 | ||
2548 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2549 | "Added temporary global client (addr: %pM orig: %pM)\n", | |
2550 | addr, orig_node->orig); | |
2551 | ret = true; | |
2552 | out: | |
2553 | return ret; | |
2554 | } | |
e1bf0c14 ML |
2555 | |
2556 | /** | |
2557 | * batadv_tt_tvlv_ogm_handler_v1 - process incoming tt tvlv container | |
2558 | * @bat_priv: the bat priv with all the soft interface information | |
2559 | * @orig: the orig_node of the ogm | |
2560 | * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) | |
2561 | * @tvlv_value: tvlv buffer containing the gateway data | |
2562 | * @tvlv_value_len: tvlv buffer length | |
2563 | */ | |
2564 | static void batadv_tt_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, | |
2565 | struct batadv_orig_node *orig, | |
2566 | uint8_t flags, | |
2567 | void *tvlv_value, | |
2568 | uint16_t tvlv_value_len) | |
2569 | { | |
2570 | struct batadv_tvlv_tt_data *tt_data; | |
2571 | uint16_t num_entries; | |
2572 | ||
2573 | if (tvlv_value_len < sizeof(*tt_data)) | |
2574 | return; | |
2575 | ||
2576 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
2577 | tvlv_value_len -= sizeof(*tt_data); | |
2578 | ||
298e6e68 | 2579 | num_entries = batadv_tt_entries(tvlv_value_len); |
e1bf0c14 ML |
2580 | |
2581 | batadv_tt_update_orig(bat_priv, orig, | |
2582 | (unsigned char *)(tt_data + 1), | |
ced72933 | 2583 | num_entries, tt_data->ttvn, ntohl(tt_data->crc)); |
e1bf0c14 ML |
2584 | } |
2585 | ||
335fbe0f ML |
2586 | /** |
2587 | * batadv_tt_tvlv_unicast_handler_v1 - process incoming (unicast) tt tvlv | |
2588 | * container | |
2589 | * @bat_priv: the bat priv with all the soft interface information | |
2590 | * @src: mac address of tt tvlv sender | |
2591 | * @dst: mac address of tt tvlv recipient | |
2592 | * @tvlv_value: tvlv buffer containing the tt data | |
2593 | * @tvlv_value_len: tvlv buffer length | |
2594 | * | |
2595 | * Returns NET_RX_DROP if the tt tvlv is to be re-routed, NET_RX_SUCCESS | |
2596 | * otherwise. | |
2597 | */ | |
2598 | static int batadv_tt_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
2599 | uint8_t *src, uint8_t *dst, | |
2600 | void *tvlv_value, | |
2601 | uint16_t tvlv_value_len) | |
2602 | { | |
2603 | struct batadv_tvlv_tt_data *tt_data; | |
2604 | uint16_t num_entries; | |
2605 | char tt_flag; | |
2606 | bool ret; | |
2607 | ||
2608 | if (tvlv_value_len < sizeof(*tt_data)) | |
2609 | return NET_RX_SUCCESS; | |
2610 | ||
2611 | tt_data = (struct batadv_tvlv_tt_data *)tvlv_value; | |
2612 | tvlv_value_len -= sizeof(*tt_data); | |
2613 | ||
298e6e68 | 2614 | num_entries = batadv_tt_entries(tvlv_value_len); |
335fbe0f ML |
2615 | |
2616 | switch (tt_data->flags & BATADV_TT_DATA_TYPE_MASK) { | |
2617 | case BATADV_TT_REQUEST: | |
2618 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_RX); | |
2619 | ||
2620 | /* If this node cannot provide a TT response the tt_request is | |
2621 | * forwarded | |
2622 | */ | |
2623 | ret = batadv_send_tt_response(bat_priv, tt_data, src, dst); | |
2624 | if (!ret) { | |
2625 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
2626 | tt_flag = 'F'; | |
2627 | else | |
2628 | tt_flag = '.'; | |
2629 | ||
2630 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2631 | "Routing TT_REQUEST to %pM [%c]\n", | |
2632 | dst, tt_flag); | |
2633 | /* tvlv API will re-route the packet */ | |
2634 | return NET_RX_DROP; | |
2635 | } | |
2636 | break; | |
2637 | case BATADV_TT_RESPONSE: | |
2638 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX); | |
2639 | ||
2640 | if (batadv_is_my_mac(bat_priv, dst)) { | |
2641 | batadv_handle_tt_response(bat_priv, tt_data, | |
2642 | src, num_entries); | |
2643 | return NET_RX_SUCCESS; | |
2644 | } | |
2645 | ||
2646 | if (tt_data->flags & BATADV_TT_FULL_TABLE) | |
2647 | tt_flag = 'F'; | |
2648 | else | |
2649 | tt_flag = '.'; | |
2650 | ||
2651 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2652 | "Routing TT_RESPONSE to %pM [%c]\n", dst, tt_flag); | |
2653 | ||
2654 | /* tvlv API will re-route the packet */ | |
2655 | return NET_RX_DROP; | |
2656 | } | |
2657 | ||
2658 | return NET_RX_SUCCESS; | |
2659 | } | |
2660 | ||
122edaa0 ML |
2661 | /** |
2662 | * batadv_roam_tvlv_unicast_handler_v1 - process incoming tt roam tvlv container | |
2663 | * @bat_priv: the bat priv with all the soft interface information | |
2664 | * @src: mac address of tt tvlv sender | |
2665 | * @dst: mac address of tt tvlv recipient | |
2666 | * @tvlv_value: tvlv buffer containing the tt data | |
2667 | * @tvlv_value_len: tvlv buffer length | |
2668 | * | |
2669 | * Returns NET_RX_DROP if the tt roam tvlv is to be re-routed, NET_RX_SUCCESS | |
2670 | * otherwise. | |
2671 | */ | |
2672 | static int batadv_roam_tvlv_unicast_handler_v1(struct batadv_priv *bat_priv, | |
2673 | uint8_t *src, uint8_t *dst, | |
2674 | void *tvlv_value, | |
2675 | uint16_t tvlv_value_len) | |
2676 | { | |
2677 | struct batadv_tvlv_roam_adv *roaming_adv; | |
2678 | struct batadv_orig_node *orig_node = NULL; | |
2679 | ||
2680 | /* If this node is not the intended recipient of the | |
2681 | * roaming advertisement the packet is forwarded | |
2682 | * (the tvlv API will re-route the packet). | |
2683 | */ | |
2684 | if (!batadv_is_my_mac(bat_priv, dst)) | |
2685 | return NET_RX_DROP; | |
2686 | ||
2687 | /* check if it is a backbone gateway. we don't accept | |
2688 | * roaming advertisement from it, as it has the same | |
2689 | * entries as we have. | |
2690 | */ | |
2691 | if (batadv_bla_is_backbone_gw_orig(bat_priv, src)) | |
2692 | goto out; | |
2693 | ||
2694 | if (tvlv_value_len < sizeof(*roaming_adv)) | |
2695 | goto out; | |
2696 | ||
2697 | orig_node = batadv_orig_hash_find(bat_priv, src); | |
2698 | if (!orig_node) | |
2699 | goto out; | |
2700 | ||
2701 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX); | |
2702 | roaming_adv = (struct batadv_tvlv_roam_adv *)tvlv_value; | |
2703 | ||
2704 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2705 | "Received ROAMING_ADV from %pM (client %pM)\n", | |
2706 | src, roaming_adv->client); | |
2707 | ||
2708 | batadv_tt_global_add(bat_priv, orig_node, roaming_adv->client, | |
2709 | BATADV_TT_CLIENT_ROAM, | |
2710 | atomic_read(&orig_node->last_ttvn) + 1); | |
2711 | ||
2712 | out: | |
2713 | if (orig_node) | |
2714 | batadv_orig_node_free_ref(orig_node); | |
2715 | return NET_RX_SUCCESS; | |
2716 | } | |
2717 | ||
e1bf0c14 ML |
2718 | /** |
2719 | * batadv_tt_init - initialise the translation table internals | |
2720 | * @bat_priv: the bat priv with all the soft interface information | |
2721 | * | |
2722 | * Return 0 on success or negative error number in case of failure. | |
2723 | */ | |
2724 | int batadv_tt_init(struct batadv_priv *bat_priv) | |
2725 | { | |
2726 | int ret; | |
2727 | ||
2728 | ret = batadv_tt_local_init(bat_priv); | |
2729 | if (ret < 0) | |
2730 | return ret; | |
2731 | ||
2732 | ret = batadv_tt_global_init(bat_priv); | |
2733 | if (ret < 0) | |
2734 | return ret; | |
2735 | ||
2736 | batadv_tvlv_handler_register(bat_priv, batadv_tt_tvlv_ogm_handler_v1, | |
335fbe0f ML |
2737 | batadv_tt_tvlv_unicast_handler_v1, |
2738 | BATADV_TVLV_TT, 1, BATADV_NO_FLAGS); | |
e1bf0c14 | 2739 | |
122edaa0 ML |
2740 | batadv_tvlv_handler_register(bat_priv, NULL, |
2741 | batadv_roam_tvlv_unicast_handler_v1, | |
2742 | BATADV_TVLV_ROAM, 1, BATADV_NO_FLAGS); | |
2743 | ||
e1bf0c14 ML |
2744 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
2745 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
2746 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
2747 | ||
2748 | return 1; | |
2749 | } |