Commit | Line | Data |
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9cfc7bd6 | 1 | /* Copyright (C) 2007-2012 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 | |
a73105b8 AQ |
30 | #include <linux/crc16.h> |
31 | ||
a513088d SE |
32 | static void batadv_send_roam_adv(struct bat_priv *bat_priv, uint8_t *client, |
33 | struct orig_node *orig_node); | |
34 | static void batadv_tt_purge(struct work_struct *work); | |
35 | static void | |
36 | batadv_tt_global_del_orig_list(struct tt_global_entry *tt_global_entry); | |
c6c8fea2 | 37 | |
7aadf889 | 38 | /* returns 1 if they are the same mac addr */ |
a513088d | 39 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 40 | { |
48100bac | 41 | const void *data1 = container_of(node, struct tt_common_entry, |
747e4221 | 42 | hash_entry); |
7aadf889 ML |
43 | |
44 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
45 | } | |
46 | ||
a513088d | 47 | static void batadv_tt_start_timer(struct bat_priv *bat_priv) |
c6c8fea2 | 48 | { |
a513088d | 49 | INIT_DELAYED_WORK(&bat_priv->tt_work, batadv_tt_purge); |
3193e8fd | 50 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt_work, |
a73105b8 | 51 | msecs_to_jiffies(5000)); |
c6c8fea2 SE |
52 | } |
53 | ||
a513088d SE |
54 | static struct tt_common_entry *batadv_tt_hash_find(struct hashtable_t *hash, |
55 | const void *data) | |
7aadf889 | 56 | { |
7aadf889 ML |
57 | struct hlist_head *head; |
58 | struct hlist_node *node; | |
48100bac | 59 | struct tt_common_entry *tt_common_entry, *tt_common_entry_tmp = NULL; |
c90681b8 | 60 | uint32_t index; |
7aadf889 ML |
61 | |
62 | if (!hash) | |
63 | return NULL; | |
64 | ||
da641193 | 65 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
66 | head = &hash->table[index]; |
67 | ||
68 | rcu_read_lock(); | |
48100bac | 69 | hlist_for_each_entry_rcu(tt_common_entry, node, head, hash_entry) { |
1eda58bf | 70 | if (!batadv_compare_eth(tt_common_entry, data)) |
7aadf889 ML |
71 | continue; |
72 | ||
48100bac | 73 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
7683fdc1 AQ |
74 | continue; |
75 | ||
48100bac | 76 | tt_common_entry_tmp = tt_common_entry; |
7aadf889 ML |
77 | break; |
78 | } | |
79 | rcu_read_unlock(); | |
80 | ||
48100bac | 81 | return tt_common_entry_tmp; |
7aadf889 ML |
82 | } |
83 | ||
a513088d SE |
84 | static struct tt_local_entry * |
85 | batadv_tt_local_hash_find(struct bat_priv *bat_priv, const void *data) | |
7aadf889 | 86 | { |
48100bac AQ |
87 | struct tt_common_entry *tt_common_entry; |
88 | struct tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 89 | |
a513088d | 90 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt_local_hash, data); |
48100bac AQ |
91 | if (tt_common_entry) |
92 | tt_local_entry = container_of(tt_common_entry, | |
93 | struct tt_local_entry, common); | |
94 | return tt_local_entry; | |
95 | } | |
7aadf889 | 96 | |
a513088d SE |
97 | static struct tt_global_entry * |
98 | batadv_tt_global_hash_find(struct bat_priv *bat_priv, const void *data) | |
48100bac AQ |
99 | { |
100 | struct tt_common_entry *tt_common_entry; | |
101 | struct tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 102 | |
a513088d | 103 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt_global_hash, data); |
48100bac AQ |
104 | if (tt_common_entry) |
105 | tt_global_entry = container_of(tt_common_entry, | |
106 | struct tt_global_entry, common); | |
107 | return tt_global_entry; | |
7aadf889 | 108 | |
7aadf889 ML |
109 | } |
110 | ||
a513088d SE |
111 | static void |
112 | batadv_tt_local_entry_free_ref(struct tt_local_entry *tt_local_entry) | |
7683fdc1 | 113 | { |
48100bac AQ |
114 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
115 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
116 | } |
117 | ||
a513088d | 118 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) |
531027fc | 119 | { |
48100bac | 120 | struct tt_common_entry *tt_common_entry; |
531027fc SW |
121 | struct tt_global_entry *tt_global_entry; |
122 | ||
48100bac AQ |
123 | tt_common_entry = container_of(rcu, struct tt_common_entry, rcu); |
124 | tt_global_entry = container_of(tt_common_entry, struct tt_global_entry, | |
125 | common); | |
531027fc | 126 | |
531027fc SW |
127 | kfree(tt_global_entry); |
128 | } | |
129 | ||
a513088d SE |
130 | static void |
131 | batadv_tt_global_entry_free_ref(struct tt_global_entry *tt_global_entry) | |
7683fdc1 | 132 | { |
db08e6e5 | 133 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 134 | batadv_tt_global_del_orig_list(tt_global_entry); |
48100bac | 135 | call_rcu(&tt_global_entry->common.rcu, |
a513088d | 136 | batadv_tt_global_entry_free_rcu); |
db08e6e5 SW |
137 | } |
138 | } | |
139 | ||
a513088d | 140 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 SW |
141 | { |
142 | struct tt_orig_list_entry *orig_entry; | |
143 | ||
144 | orig_entry = container_of(rcu, struct tt_orig_list_entry, rcu); | |
7d211efc | 145 | batadv_orig_node_free_ref(orig_entry->orig_node); |
db08e6e5 SW |
146 | kfree(orig_entry); |
147 | } | |
148 | ||
a513088d SE |
149 | static void |
150 | batadv_tt_orig_list_entry_free_ref(struct tt_orig_list_entry *orig_entry) | |
db08e6e5 | 151 | { |
a513088d | 152 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
153 | } |
154 | ||
a513088d SE |
155 | static void batadv_tt_local_event(struct bat_priv *bat_priv, |
156 | const uint8_t *addr, uint8_t flags) | |
a73105b8 AQ |
157 | { |
158 | struct tt_change_node *tt_change_node; | |
159 | ||
160 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
161 | ||
162 | if (!tt_change_node) | |
163 | return; | |
164 | ||
ff66c975 | 165 | tt_change_node->change.flags = flags; |
a73105b8 AQ |
166 | memcpy(tt_change_node->change.addr, addr, ETH_ALEN); |
167 | ||
168 | spin_lock_bh(&bat_priv->tt_changes_list_lock); | |
169 | /* track the change in the OGMinterval list */ | |
170 | list_add_tail(&tt_change_node->list, &bat_priv->tt_changes_list); | |
171 | atomic_inc(&bat_priv->tt_local_changes); | |
172 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); | |
173 | ||
174 | atomic_set(&bat_priv->tt_ogm_append_cnt, 0); | |
175 | } | |
176 | ||
08c36d3e | 177 | int batadv_tt_len(int changes_num) |
a73105b8 AQ |
178 | { |
179 | return changes_num * sizeof(struct tt_change); | |
180 | } | |
181 | ||
a513088d | 182 | static int batadv_tt_local_init(struct bat_priv *bat_priv) |
c6c8fea2 | 183 | { |
2dafb49d | 184 | if (bat_priv->tt_local_hash) |
5346c35e | 185 | return 0; |
c6c8fea2 | 186 | |
1a8eaf07 | 187 | bat_priv->tt_local_hash = batadv_hash_new(1024); |
c6c8fea2 | 188 | |
2dafb49d | 189 | if (!bat_priv->tt_local_hash) |
5346c35e | 190 | return -ENOMEM; |
c6c8fea2 | 191 | |
5346c35e | 192 | return 0; |
c6c8fea2 SE |
193 | } |
194 | ||
08c36d3e SE |
195 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
196 | int ifindex) | |
c6c8fea2 SE |
197 | { |
198 | struct bat_priv *bat_priv = netdev_priv(soft_iface); | |
7683fdc1 AQ |
199 | struct tt_local_entry *tt_local_entry = NULL; |
200 | struct tt_global_entry *tt_global_entry = NULL; | |
db08e6e5 SW |
201 | struct hlist_head *head; |
202 | struct hlist_node *node; | |
203 | struct tt_orig_list_entry *orig_entry; | |
80b3f58c | 204 | int hash_added; |
c6c8fea2 | 205 | |
a513088d | 206 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
c6c8fea2 | 207 | |
2dafb49d AQ |
208 | if (tt_local_entry) { |
209 | tt_local_entry->last_seen = jiffies; | |
521251f2 AQ |
210 | /* possibly unset the TT_CLIENT_PENDING flag */ |
211 | tt_local_entry->common.flags &= ~TT_CLIENT_PENDING; | |
7683fdc1 | 212 | goto out; |
c6c8fea2 SE |
213 | } |
214 | ||
704509b8 | 215 | tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC); |
2dafb49d | 216 | if (!tt_local_entry) |
7683fdc1 | 217 | goto out; |
a73105b8 | 218 | |
1eda58bf SE |
219 | batadv_dbg(DBG_TT, bat_priv, |
220 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, | |
221 | (uint8_t)atomic_read(&bat_priv->ttvn)); | |
c6c8fea2 | 222 | |
48100bac AQ |
223 | memcpy(tt_local_entry->common.addr, addr, ETH_ALEN); |
224 | tt_local_entry->common.flags = NO_FLAGS; | |
9563877e | 225 | if (batadv_is_wifi_iface(ifindex)) |
48100bac AQ |
226 | tt_local_entry->common.flags |= TT_CLIENT_WIFI; |
227 | atomic_set(&tt_local_entry->common.refcount, 2); | |
228 | tt_local_entry->last_seen = jiffies; | |
c6c8fea2 SE |
229 | |
230 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 231 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
48100bac | 232 | tt_local_entry->common.flags |= TT_CLIENT_NOPURGE; |
c6c8fea2 | 233 | |
c40ed2bf AQ |
234 | /* The local entry has to be marked as NEW to avoid to send it in |
235 | * a full table response going out before the next ttvn increment | |
9cfc7bd6 SE |
236 | * (consistency check) |
237 | */ | |
c40ed2bf AQ |
238 | tt_local_entry->common.flags |= TT_CLIENT_NEW; |
239 | ||
a513088d | 240 | hash_added = batadv_hash_add(bat_priv->tt_local_hash, batadv_compare_tt, |
da641193 SE |
241 | batadv_choose_orig, |
242 | &tt_local_entry->common, | |
c0a55929 | 243 | &tt_local_entry->common.hash_entry); |
80b3f58c SW |
244 | |
245 | if (unlikely(hash_added != 0)) { | |
246 | /* remove the reference for the hash */ | |
a513088d | 247 | batadv_tt_local_entry_free_ref(tt_local_entry); |
80b3f58c SW |
248 | goto out; |
249 | } | |
250 | ||
a513088d | 251 | batadv_tt_local_event(bat_priv, addr, tt_local_entry->common.flags); |
ff66c975 | 252 | |
c6c8fea2 | 253 | /* remove address from global hash if present */ |
a513088d | 254 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 255 | |
cc47f66e AQ |
256 | /* Check whether it is a roaming! */ |
257 | if (tt_global_entry) { | |
db08e6e5 SW |
258 | /* These node are probably going to update their tt table */ |
259 | head = &tt_global_entry->orig_list; | |
260 | rcu_read_lock(); | |
261 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
262 | orig_entry->orig_node->tt_poss_change = true; | |
263 | ||
a513088d SE |
264 | batadv_send_roam_adv(bat_priv, |
265 | tt_global_entry->common.addr, | |
266 | orig_entry->orig_node); | |
db08e6e5 SW |
267 | } |
268 | rcu_read_unlock(); | |
269 | /* The global entry has to be marked as ROAMING and | |
270 | * has to be kept for consistency purpose | |
271 | */ | |
220b07e9 | 272 | tt_global_entry->common.flags |= TT_CLIENT_ROAM; |
03fc3070 | 273 | tt_global_entry->roam_at = jiffies; |
7683fdc1 AQ |
274 | } |
275 | out: | |
276 | if (tt_local_entry) | |
a513088d | 277 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 278 | if (tt_global_entry) |
a513088d | 279 | batadv_tt_global_entry_free_ref(tt_global_entry); |
c6c8fea2 SE |
280 | } |
281 | ||
a513088d SE |
282 | static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, |
283 | int *packet_buff_len, | |
284 | int min_packet_len, | |
285 | int new_packet_len) | |
be9aa4c1 ML |
286 | { |
287 | unsigned char *new_buff; | |
288 | ||
289 | new_buff = kmalloc(new_packet_len, GFP_ATOMIC); | |
290 | ||
291 | /* keep old buffer if kmalloc should fail */ | |
292 | if (new_buff) { | |
293 | memcpy(new_buff, *packet_buff, min_packet_len); | |
294 | kfree(*packet_buff); | |
295 | *packet_buff = new_buff; | |
296 | *packet_buff_len = new_packet_len; | |
297 | } | |
298 | } | |
299 | ||
a513088d SE |
300 | static void batadv_tt_prepare_packet_buff(struct bat_priv *bat_priv, |
301 | unsigned char **packet_buff, | |
302 | int *packet_buff_len, | |
303 | int min_packet_len) | |
be9aa4c1 ML |
304 | { |
305 | struct hard_iface *primary_if; | |
306 | int req_len; | |
307 | ||
e5d89254 | 308 | primary_if = batadv_primary_if_get_selected(bat_priv); |
be9aa4c1 ML |
309 | |
310 | req_len = min_packet_len; | |
08c36d3e | 311 | req_len += batadv_tt_len(atomic_read(&bat_priv->tt_local_changes)); |
be9aa4c1 ML |
312 | |
313 | /* if we have too many changes for one packet don't send any | |
314 | * and wait for the tt table request which will be fragmented | |
315 | */ | |
316 | if ((!primary_if) || (req_len > primary_if->soft_iface->mtu)) | |
317 | req_len = min_packet_len; | |
318 | ||
a513088d SE |
319 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
320 | min_packet_len, req_len); | |
be9aa4c1 ML |
321 | |
322 | if (primary_if) | |
e5d89254 | 323 | batadv_hardif_free_ref(primary_if); |
be9aa4c1 ML |
324 | } |
325 | ||
a513088d SE |
326 | static int batadv_tt_changes_fill_buff(struct bat_priv *bat_priv, |
327 | unsigned char **packet_buff, | |
328 | int *packet_buff_len, | |
329 | int min_packet_len) | |
c6c8fea2 | 330 | { |
a73105b8 | 331 | struct tt_change_node *entry, *safe; |
be9aa4c1 ML |
332 | int count = 0, tot_changes = 0, new_len; |
333 | unsigned char *tt_buff; | |
334 | ||
a513088d SE |
335 | batadv_tt_prepare_packet_buff(bat_priv, packet_buff, |
336 | packet_buff_len, min_packet_len); | |
c6c8fea2 | 337 | |
be9aa4c1 ML |
338 | new_len = *packet_buff_len - min_packet_len; |
339 | tt_buff = *packet_buff + min_packet_len; | |
340 | ||
341 | if (new_len > 0) | |
08c36d3e | 342 | tot_changes = new_len / batadv_tt_len(1); |
c6c8fea2 | 343 | |
a73105b8 AQ |
344 | spin_lock_bh(&bat_priv->tt_changes_list_lock); |
345 | atomic_set(&bat_priv->tt_local_changes, 0); | |
c6c8fea2 | 346 | |
a73105b8 | 347 | list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list, |
7c64fd98 | 348 | list) { |
a73105b8 | 349 | if (count < tot_changes) { |
08c36d3e | 350 | memcpy(tt_buff + batadv_tt_len(count), |
a73105b8 | 351 | &entry->change, sizeof(struct tt_change)); |
c6c8fea2 SE |
352 | count++; |
353 | } | |
a73105b8 AQ |
354 | list_del(&entry->list); |
355 | kfree(entry); | |
c6c8fea2 | 356 | } |
a73105b8 AQ |
357 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); |
358 | ||
359 | /* Keep the buffer for possible tt_request */ | |
360 | spin_lock_bh(&bat_priv->tt_buff_lock); | |
361 | kfree(bat_priv->tt_buff); | |
362 | bat_priv->tt_buff_len = 0; | |
363 | bat_priv->tt_buff = NULL; | |
be9aa4c1 ML |
364 | /* check whether this new OGM has no changes due to size problems */ |
365 | if (new_len > 0) { | |
366 | /* if kmalloc() fails we will reply with the full table | |
a73105b8 AQ |
367 | * instead of providing the diff |
368 | */ | |
be9aa4c1 | 369 | bat_priv->tt_buff = kmalloc(new_len, GFP_ATOMIC); |
a73105b8 | 370 | if (bat_priv->tt_buff) { |
be9aa4c1 ML |
371 | memcpy(bat_priv->tt_buff, tt_buff, new_len); |
372 | bat_priv->tt_buff_len = new_len; | |
a73105b8 AQ |
373 | } |
374 | } | |
375 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
c6c8fea2 | 376 | |
08ad76ec | 377 | return count; |
c6c8fea2 SE |
378 | } |
379 | ||
08c36d3e | 380 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
381 | { |
382 | struct net_device *net_dev = (struct net_device *)seq->private; | |
383 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
2dafb49d | 384 | struct hashtable_t *hash = bat_priv->tt_local_hash; |
48100bac | 385 | struct tt_common_entry *tt_common_entry; |
32ae9b22 | 386 | struct hard_iface *primary_if; |
7aadf889 | 387 | struct hlist_node *node; |
c6c8fea2 | 388 | struct hlist_head *head; |
c90681b8 AQ |
389 | uint32_t i; |
390 | int ret = 0; | |
32ae9b22 | 391 | |
e5d89254 | 392 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 393 | if (!primary_if) { |
86ceb360 SE |
394 | ret = seq_printf(seq, |
395 | "BATMAN mesh %s disabled - please specify interfaces to enable it\n", | |
32ae9b22 ML |
396 | net_dev->name); |
397 | goto out; | |
398 | } | |
c6c8fea2 | 399 | |
32ae9b22 | 400 | if (primary_if->if_status != IF_ACTIVE) { |
86ceb360 SE |
401 | ret = seq_printf(seq, |
402 | "BATMAN mesh %s disabled - primary interface not active\n", | |
32ae9b22 ML |
403 | net_dev->name); |
404 | goto out; | |
c6c8fea2 SE |
405 | } |
406 | ||
86ceb360 SE |
407 | seq_printf(seq, |
408 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", | |
a73105b8 | 409 | net_dev->name, (uint8_t)atomic_read(&bat_priv->ttvn)); |
c6c8fea2 | 410 | |
c6c8fea2 SE |
411 | for (i = 0; i < hash->size; i++) { |
412 | head = &hash->table[i]; | |
413 | ||
7aadf889 | 414 | rcu_read_lock(); |
48100bac | 415 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 416 | head, hash_entry) { |
d099c2c5 | 417 | seq_printf(seq, " * %pM [%c%c%c%c%c]\n", |
7c64fd98 SE |
418 | tt_common_entry->addr, |
419 | (tt_common_entry->flags & | |
420 | TT_CLIENT_ROAM ? 'R' : '.'), | |
421 | (tt_common_entry->flags & | |
422 | TT_CLIENT_NOPURGE ? 'P' : '.'), | |
423 | (tt_common_entry->flags & | |
424 | TT_CLIENT_NEW ? 'N' : '.'), | |
425 | (tt_common_entry->flags & | |
426 | TT_CLIENT_PENDING ? 'X' : '.'), | |
427 | (tt_common_entry->flags & | |
428 | TT_CLIENT_WIFI ? 'W' : '.')); | |
c6c8fea2 | 429 | } |
7aadf889 | 430 | rcu_read_unlock(); |
c6c8fea2 | 431 | } |
32ae9b22 ML |
432 | out: |
433 | if (primary_if) | |
e5d89254 | 434 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 435 | return ret; |
c6c8fea2 SE |
436 | } |
437 | ||
a513088d SE |
438 | static void batadv_tt_local_set_pending(struct bat_priv *bat_priv, |
439 | struct tt_local_entry *tt_local_entry, | |
440 | uint16_t flags, const char *message) | |
c6c8fea2 | 441 | { |
a513088d SE |
442 | batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, |
443 | tt_local_entry->common.flags | flags); | |
a73105b8 | 444 | |
015758d0 AQ |
445 | /* The local client has to be marked as "pending to be removed" but has |
446 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
447 | * response issued before the net ttvn increment (consistency check) |
448 | */ | |
48100bac | 449 | tt_local_entry->common.flags |= TT_CLIENT_PENDING; |
c566dbbe | 450 | |
1eda58bf SE |
451 | batadv_dbg(DBG_TT, bat_priv, |
452 | "Local tt entry (%pM) pending to be removed: %s\n", | |
453 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
454 | } |
455 | ||
08c36d3e SE |
456 | void batadv_tt_local_remove(struct bat_priv *bat_priv, const uint8_t *addr, |
457 | const char *message, bool roaming) | |
c6c8fea2 | 458 | { |
7683fdc1 | 459 | struct tt_local_entry *tt_local_entry = NULL; |
c6c8fea2 | 460 | |
a513088d | 461 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
462 | if (!tt_local_entry) |
463 | goto out; | |
464 | ||
a513088d SE |
465 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, TT_CLIENT_DEL | |
466 | (roaming ? TT_CLIENT_ROAM : NO_FLAGS), | |
467 | message); | |
7683fdc1 AQ |
468 | out: |
469 | if (tt_local_entry) | |
a513088d | 470 | batadv_tt_local_entry_free_ref(tt_local_entry); |
c6c8fea2 SE |
471 | } |
472 | ||
a513088d | 473 | static void batadv_tt_local_purge(struct bat_priv *bat_priv) |
c6c8fea2 | 474 | { |
2dafb49d AQ |
475 | struct hashtable_t *hash = bat_priv->tt_local_hash; |
476 | struct tt_local_entry *tt_local_entry; | |
48100bac | 477 | struct tt_common_entry *tt_common_entry; |
7aadf889 | 478 | struct hlist_node *node, *node_tmp; |
c6c8fea2 | 479 | struct hlist_head *head; |
7683fdc1 | 480 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 481 | uint32_t i; |
c6c8fea2 | 482 | |
c6c8fea2 SE |
483 | for (i = 0; i < hash->size; i++) { |
484 | head = &hash->table[i]; | |
7683fdc1 | 485 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 486 | |
7683fdc1 | 487 | spin_lock_bh(list_lock); |
48100bac | 488 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
7aadf889 | 489 | head, hash_entry) { |
48100bac AQ |
490 | tt_local_entry = container_of(tt_common_entry, |
491 | struct tt_local_entry, | |
492 | common); | |
493 | if (tt_local_entry->common.flags & TT_CLIENT_NOPURGE) | |
7aadf889 | 494 | continue; |
c6c8fea2 | 495 | |
058d0e26 | 496 | /* entry already marked for deletion */ |
48100bac | 497 | if (tt_local_entry->common.flags & TT_CLIENT_PENDING) |
058d0e26 AQ |
498 | continue; |
499 | ||
1eda58bf SE |
500 | if (!batadv_has_timed_out(tt_local_entry->last_seen, |
501 | TT_LOCAL_TIMEOUT)) | |
7aadf889 ML |
502 | continue; |
503 | ||
a513088d SE |
504 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, |
505 | TT_CLIENT_DEL, "timed out"); | |
c6c8fea2 | 506 | } |
7683fdc1 | 507 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
508 | } |
509 | ||
c6c8fea2 SE |
510 | } |
511 | ||
a513088d | 512 | static void batadv_tt_local_table_free(struct bat_priv *bat_priv) |
c6c8fea2 | 513 | { |
a73105b8 | 514 | struct hashtable_t *hash; |
a73105b8 | 515 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
48100bac | 516 | struct tt_common_entry *tt_common_entry; |
a73105b8 | 517 | struct tt_local_entry *tt_local_entry; |
7683fdc1 AQ |
518 | struct hlist_node *node, *node_tmp; |
519 | struct hlist_head *head; | |
c90681b8 | 520 | uint32_t i; |
a73105b8 | 521 | |
2dafb49d | 522 | if (!bat_priv->tt_local_hash) |
c6c8fea2 SE |
523 | return; |
524 | ||
a73105b8 AQ |
525 | hash = bat_priv->tt_local_hash; |
526 | ||
527 | for (i = 0; i < hash->size; i++) { | |
528 | head = &hash->table[i]; | |
529 | list_lock = &hash->list_locks[i]; | |
530 | ||
531 | spin_lock_bh(list_lock); | |
48100bac | 532 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
a73105b8 AQ |
533 | head, hash_entry) { |
534 | hlist_del_rcu(node); | |
48100bac AQ |
535 | tt_local_entry = container_of(tt_common_entry, |
536 | struct tt_local_entry, | |
537 | common); | |
a513088d | 538 | batadv_tt_local_entry_free_ref(tt_local_entry); |
a73105b8 AQ |
539 | } |
540 | spin_unlock_bh(list_lock); | |
541 | } | |
542 | ||
1a8eaf07 | 543 | batadv_hash_destroy(hash); |
a73105b8 | 544 | |
2dafb49d | 545 | bat_priv->tt_local_hash = NULL; |
c6c8fea2 SE |
546 | } |
547 | ||
a513088d | 548 | static int batadv_tt_global_init(struct bat_priv *bat_priv) |
c6c8fea2 | 549 | { |
2dafb49d | 550 | if (bat_priv->tt_global_hash) |
5346c35e | 551 | return 0; |
c6c8fea2 | 552 | |
1a8eaf07 | 553 | bat_priv->tt_global_hash = batadv_hash_new(1024); |
c6c8fea2 | 554 | |
2dafb49d | 555 | if (!bat_priv->tt_global_hash) |
5346c35e | 556 | return -ENOMEM; |
c6c8fea2 | 557 | |
5346c35e | 558 | return 0; |
c6c8fea2 SE |
559 | } |
560 | ||
a513088d | 561 | static void batadv_tt_changes_list_free(struct bat_priv *bat_priv) |
c6c8fea2 | 562 | { |
a73105b8 | 563 | struct tt_change_node *entry, *safe; |
c6c8fea2 | 564 | |
a73105b8 | 565 | spin_lock_bh(&bat_priv->tt_changes_list_lock); |
c6c8fea2 | 566 | |
a73105b8 AQ |
567 | list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list, |
568 | list) { | |
569 | list_del(&entry->list); | |
570 | kfree(entry); | |
571 | } | |
c6c8fea2 | 572 | |
a73105b8 AQ |
573 | atomic_set(&bat_priv->tt_local_changes, 0); |
574 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); | |
575 | } | |
c6c8fea2 | 576 | |
db08e6e5 SW |
577 | /* find out if an orig_node is already in the list of a tt_global_entry. |
578 | * returns 1 if found, 0 otherwise | |
579 | */ | |
a513088d SE |
580 | static bool batadv_tt_global_entry_has_orig(const struct tt_global_entry *entry, |
581 | const struct orig_node *orig_node) | |
db08e6e5 SW |
582 | { |
583 | struct tt_orig_list_entry *tmp_orig_entry; | |
584 | const struct hlist_head *head; | |
585 | struct hlist_node *node; | |
586 | bool found = false; | |
587 | ||
588 | rcu_read_lock(); | |
589 | head = &entry->orig_list; | |
590 | hlist_for_each_entry_rcu(tmp_orig_entry, node, head, list) { | |
591 | if (tmp_orig_entry->orig_node == orig_node) { | |
592 | found = true; | |
593 | break; | |
594 | } | |
595 | } | |
596 | rcu_read_unlock(); | |
597 | return found; | |
598 | } | |
599 | ||
a513088d SE |
600 | static void |
601 | batadv_tt_global_add_orig_entry(struct tt_global_entry *tt_global_entry, | |
602 | struct orig_node *orig_node, int ttvn) | |
db08e6e5 SW |
603 | { |
604 | struct tt_orig_list_entry *orig_entry; | |
605 | ||
606 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); | |
607 | if (!orig_entry) | |
608 | return; | |
609 | ||
610 | INIT_HLIST_NODE(&orig_entry->list); | |
611 | atomic_inc(&orig_node->refcount); | |
612 | atomic_inc(&orig_node->tt_size); | |
613 | orig_entry->orig_node = orig_node; | |
614 | orig_entry->ttvn = ttvn; | |
615 | ||
616 | spin_lock_bh(&tt_global_entry->list_lock); | |
617 | hlist_add_head_rcu(&orig_entry->list, | |
618 | &tt_global_entry->orig_list); | |
619 | spin_unlock_bh(&tt_global_entry->list_lock); | |
620 | } | |
621 | ||
a73105b8 | 622 | /* caller must hold orig_node refcount */ |
08c36d3e SE |
623 | int batadv_tt_global_add(struct bat_priv *bat_priv, struct orig_node *orig_node, |
624 | const unsigned char *tt_addr, uint8_t ttvn, | |
625 | bool roaming, bool wifi) | |
a73105b8 | 626 | { |
db08e6e5 | 627 | struct tt_global_entry *tt_global_entry = NULL; |
7683fdc1 | 628 | int ret = 0; |
80b3f58c | 629 | int hash_added; |
c0a55929 | 630 | struct tt_common_entry *common; |
c6c8fea2 | 631 | |
a513088d | 632 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
a73105b8 AQ |
633 | |
634 | if (!tt_global_entry) { | |
db08e6e5 SW |
635 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), |
636 | GFP_ATOMIC); | |
a73105b8 | 637 | if (!tt_global_entry) |
7683fdc1 AQ |
638 | goto out; |
639 | ||
c0a55929 SE |
640 | common = &tt_global_entry->common; |
641 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 642 | |
c0a55929 | 643 | common->flags = NO_FLAGS; |
cc47f66e | 644 | tt_global_entry->roam_at = 0; |
c0a55929 | 645 | atomic_set(&common->refcount, 2); |
db08e6e5 SW |
646 | |
647 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
648 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 649 | |
c0a55929 | 650 | hash_added = batadv_hash_add(bat_priv->tt_global_hash, |
a513088d SE |
651 | batadv_compare_tt, |
652 | batadv_choose_orig, common, | |
653 | &common->hash_entry); | |
80b3f58c SW |
654 | |
655 | if (unlikely(hash_added != 0)) { | |
656 | /* remove the reference for the hash */ | |
a513088d | 657 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
658 | goto out_remove; |
659 | } | |
db08e6e5 | 660 | |
a513088d SE |
661 | batadv_tt_global_add_orig_entry(tt_global_entry, orig_node, |
662 | ttvn); | |
a73105b8 | 663 | } else { |
db08e6e5 SW |
664 | /* there is already a global entry, use this one. */ |
665 | ||
666 | /* If there is the TT_CLIENT_ROAM flag set, there is only one | |
667 | * originator left in the list and we previously received a | |
668 | * delete + roaming change for this originator. | |
669 | * | |
670 | * We should first delete the old originator before adding the | |
671 | * new one. | |
672 | */ | |
673 | if (tt_global_entry->common.flags & TT_CLIENT_ROAM) { | |
a513088d | 674 | batadv_tt_global_del_orig_list(tt_global_entry); |
db08e6e5 SW |
675 | tt_global_entry->common.flags &= ~TT_CLIENT_ROAM; |
676 | tt_global_entry->roam_at = 0; | |
a73105b8 | 677 | } |
db08e6e5 | 678 | |
a513088d SE |
679 | if (!batadv_tt_global_entry_has_orig(tt_global_entry, |
680 | orig_node)) | |
681 | batadv_tt_global_add_orig_entry(tt_global_entry, | |
682 | orig_node, ttvn); | |
a73105b8 | 683 | } |
c6c8fea2 | 684 | |
bc279080 | 685 | if (wifi) |
48100bac | 686 | tt_global_entry->common.flags |= TT_CLIENT_WIFI; |
bc279080 | 687 | |
1eda58bf SE |
688 | batadv_dbg(DBG_TT, bat_priv, |
689 | "Creating new global tt entry: %pM (via %pM)\n", | |
690 | tt_global_entry->common.addr, orig_node->orig); | |
c6c8fea2 | 691 | |
80b3f58c | 692 | out_remove: |
a73105b8 | 693 | /* remove address from local hash if present */ |
08c36d3e SE |
694 | batadv_tt_local_remove(bat_priv, tt_global_entry->common.addr, |
695 | "global tt received", roaming); | |
7683fdc1 AQ |
696 | ret = 1; |
697 | out: | |
698 | if (tt_global_entry) | |
a513088d | 699 | batadv_tt_global_entry_free_ref(tt_global_entry); |
7683fdc1 | 700 | return ret; |
c6c8fea2 SE |
701 | } |
702 | ||
db08e6e5 SW |
703 | /* print all orig nodes who announce the address for this global entry. |
704 | * it is assumed that the caller holds rcu_read_lock(); | |
705 | */ | |
a513088d SE |
706 | static void |
707 | batadv_tt_global_print_entry(struct tt_global_entry *tt_global_entry, | |
708 | struct seq_file *seq) | |
db08e6e5 SW |
709 | { |
710 | struct hlist_head *head; | |
711 | struct hlist_node *node; | |
712 | struct tt_orig_list_entry *orig_entry; | |
713 | struct tt_common_entry *tt_common_entry; | |
714 | uint16_t flags; | |
715 | uint8_t last_ttvn; | |
716 | ||
717 | tt_common_entry = &tt_global_entry->common; | |
718 | ||
719 | head = &tt_global_entry->orig_list; | |
720 | ||
721 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
722 | flags = tt_common_entry->flags; | |
723 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); | |
724 | seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c]\n", | |
725 | tt_global_entry->common.addr, orig_entry->ttvn, | |
726 | orig_entry->orig_node->orig, last_ttvn, | |
727 | (flags & TT_CLIENT_ROAM ? 'R' : '.'), | |
728 | (flags & TT_CLIENT_WIFI ? 'W' : '.')); | |
729 | } | |
730 | } | |
731 | ||
08c36d3e | 732 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
733 | { |
734 | struct net_device *net_dev = (struct net_device *)seq->private; | |
735 | struct bat_priv *bat_priv = netdev_priv(net_dev); | |
2dafb49d | 736 | struct hashtable_t *hash = bat_priv->tt_global_hash; |
48100bac | 737 | struct tt_common_entry *tt_common_entry; |
2dafb49d | 738 | struct tt_global_entry *tt_global_entry; |
32ae9b22 | 739 | struct hard_iface *primary_if; |
7aadf889 | 740 | struct hlist_node *node; |
c6c8fea2 | 741 | struct hlist_head *head; |
c90681b8 AQ |
742 | uint32_t i; |
743 | int ret = 0; | |
32ae9b22 | 744 | |
e5d89254 | 745 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 746 | if (!primary_if) { |
86ceb360 SE |
747 | ret = seq_printf(seq, |
748 | "BATMAN mesh %s disabled - please specify interfaces to enable it\n", | |
32ae9b22 ML |
749 | net_dev->name); |
750 | goto out; | |
751 | } | |
c6c8fea2 | 752 | |
32ae9b22 | 753 | if (primary_if->if_status != IF_ACTIVE) { |
86ceb360 SE |
754 | ret = seq_printf(seq, |
755 | "BATMAN mesh %s disabled - primary interface not active\n", | |
32ae9b22 ML |
756 | net_dev->name); |
757 | goto out; | |
c6c8fea2 SE |
758 | } |
759 | ||
2dafb49d AQ |
760 | seq_printf(seq, |
761 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 762 | net_dev->name); |
df6edb9e AQ |
763 | seq_printf(seq, " %-13s %s %-15s %s %s\n", |
764 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags"); | |
c6c8fea2 | 765 | |
c6c8fea2 SE |
766 | for (i = 0; i < hash->size; i++) { |
767 | head = &hash->table[i]; | |
768 | ||
7aadf889 | 769 | rcu_read_lock(); |
48100bac | 770 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 771 | head, hash_entry) { |
48100bac AQ |
772 | tt_global_entry = container_of(tt_common_entry, |
773 | struct tt_global_entry, | |
774 | common); | |
a513088d | 775 | batadv_tt_global_print_entry(tt_global_entry, seq); |
c6c8fea2 | 776 | } |
7aadf889 | 777 | rcu_read_unlock(); |
c6c8fea2 | 778 | } |
32ae9b22 ML |
779 | out: |
780 | if (primary_if) | |
e5d89254 | 781 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 782 | return ret; |
c6c8fea2 SE |
783 | } |
784 | ||
db08e6e5 | 785 | /* deletes the orig list of a tt_global_entry */ |
a513088d SE |
786 | static void |
787 | batadv_tt_global_del_orig_list(struct tt_global_entry *tt_global_entry) | |
c6c8fea2 | 788 | { |
db08e6e5 SW |
789 | struct hlist_head *head; |
790 | struct hlist_node *node, *safe; | |
791 | struct tt_orig_list_entry *orig_entry; | |
a73105b8 | 792 | |
db08e6e5 SW |
793 | spin_lock_bh(&tt_global_entry->list_lock); |
794 | head = &tt_global_entry->orig_list; | |
795 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
796 | hlist_del_rcu(node); | |
a513088d | 797 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
798 | } |
799 | spin_unlock_bh(&tt_global_entry->list_lock); | |
c6c8fea2 | 800 | |
db08e6e5 SW |
801 | } |
802 | ||
a513088d SE |
803 | static void |
804 | batadv_tt_global_del_orig_entry(struct bat_priv *bat_priv, | |
805 | struct tt_global_entry *tt_global_entry, | |
806 | struct orig_node *orig_node, | |
807 | const char *message) | |
db08e6e5 SW |
808 | { |
809 | struct hlist_head *head; | |
810 | struct hlist_node *node, *safe; | |
811 | struct tt_orig_list_entry *orig_entry; | |
812 | ||
813 | spin_lock_bh(&tt_global_entry->list_lock); | |
814 | head = &tt_global_entry->orig_list; | |
815 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
816 | if (orig_entry->orig_node == orig_node) { | |
1eda58bf SE |
817 | batadv_dbg(DBG_TT, bat_priv, |
818 | "Deleting %pM from global tt entry %pM: %s\n", | |
819 | orig_node->orig, | |
820 | tt_global_entry->common.addr, message); | |
db08e6e5 | 821 | hlist_del_rcu(node); |
a513088d | 822 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
823 | } |
824 | } | |
825 | spin_unlock_bh(&tt_global_entry->list_lock); | |
826 | } | |
827 | ||
a513088d SE |
828 | static void batadv_tt_global_del_struct(struct bat_priv *bat_priv, |
829 | struct tt_global_entry *tt_global_entry, | |
830 | const char *message) | |
db08e6e5 | 831 | { |
1eda58bf SE |
832 | batadv_dbg(DBG_TT, bat_priv, "Deleting global tt entry %pM: %s\n", |
833 | tt_global_entry->common.addr, message); | |
7683fdc1 | 834 | |
a513088d | 835 | batadv_hash_remove(bat_priv->tt_global_hash, batadv_compare_tt, |
da641193 | 836 | batadv_choose_orig, tt_global_entry->common.addr); |
a513088d | 837 | batadv_tt_global_entry_free_ref(tt_global_entry); |
db08e6e5 | 838 | |
c6c8fea2 SE |
839 | } |
840 | ||
db08e6e5 SW |
841 | /* If the client is to be deleted, we check if it is the last origantor entry |
842 | * within tt_global entry. If yes, we set the TT_CLIENT_ROAM flag and the timer, | |
843 | * otherwise we simply remove the originator scheduled for deletion. | |
844 | */ | |
a513088d SE |
845 | static void |
846 | batadv_tt_global_del_roaming(struct bat_priv *bat_priv, | |
847 | struct tt_global_entry *tt_global_entry, | |
848 | struct orig_node *orig_node, const char *message) | |
db08e6e5 SW |
849 | { |
850 | bool last_entry = true; | |
851 | struct hlist_head *head; | |
852 | struct hlist_node *node; | |
853 | struct tt_orig_list_entry *orig_entry; | |
854 | ||
855 | /* no local entry exists, case 1: | |
856 | * Check if this is the last one or if other entries exist. | |
857 | */ | |
858 | ||
859 | rcu_read_lock(); | |
860 | head = &tt_global_entry->orig_list; | |
861 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
862 | if (orig_entry->orig_node != orig_node) { | |
863 | last_entry = false; | |
864 | break; | |
865 | } | |
866 | } | |
867 | rcu_read_unlock(); | |
868 | ||
869 | if (last_entry) { | |
870 | /* its the last one, mark for roaming. */ | |
871 | tt_global_entry->common.flags |= TT_CLIENT_ROAM; | |
872 | tt_global_entry->roam_at = jiffies; | |
873 | } else | |
874 | /* there is another entry, we can simply delete this | |
875 | * one and can still use the other one. | |
876 | */ | |
a513088d SE |
877 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
878 | orig_node, message); | |
db08e6e5 SW |
879 | } |
880 | ||
881 | ||
882 | ||
a513088d SE |
883 | static void batadv_tt_global_del(struct bat_priv *bat_priv, |
884 | struct orig_node *orig_node, | |
885 | const unsigned char *addr, | |
886 | const char *message, bool roaming) | |
a73105b8 | 887 | { |
7683fdc1 | 888 | struct tt_global_entry *tt_global_entry = NULL; |
a513088d | 889 | struct tt_local_entry *local_entry = NULL; |
a73105b8 | 890 | |
a513088d | 891 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 892 | if (!tt_global_entry) |
7683fdc1 | 893 | goto out; |
a73105b8 | 894 | |
db08e6e5 | 895 | if (!roaming) { |
a513088d SE |
896 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
897 | orig_node, message); | |
db08e6e5 SW |
898 | |
899 | if (hlist_empty(&tt_global_entry->orig_list)) | |
a513088d SE |
900 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, |
901 | message); | |
db08e6e5 SW |
902 | |
903 | goto out; | |
904 | } | |
92f90f56 SE |
905 | |
906 | /* if we are deleting a global entry due to a roam | |
907 | * event, there are two possibilities: | |
db08e6e5 SW |
908 | * 1) the client roamed from node A to node B => if there |
909 | * is only one originator left for this client, we mark | |
92f90f56 SE |
910 | * it with TT_CLIENT_ROAM, we start a timer and we |
911 | * wait for node B to claim it. In case of timeout | |
912 | * the entry is purged. | |
db08e6e5 SW |
913 | * |
914 | * If there are other originators left, we directly delete | |
915 | * the originator. | |
92f90f56 | 916 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
917 | * the global entry, since it is useless now. |
918 | */ | |
a513088d SE |
919 | local_entry = batadv_tt_local_hash_find(bat_priv, |
920 | tt_global_entry->common.addr); | |
921 | if (local_entry) { | |
db08e6e5 | 922 | /* local entry exists, case 2: client roamed to us. */ |
a513088d SE |
923 | batadv_tt_global_del_orig_list(tt_global_entry); |
924 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, message); | |
db08e6e5 SW |
925 | } else |
926 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
927 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
928 | orig_node, message); | |
92f90f56 | 929 | |
92f90f56 | 930 | |
cc47f66e | 931 | out: |
7683fdc1 | 932 | if (tt_global_entry) |
a513088d SE |
933 | batadv_tt_global_entry_free_ref(tt_global_entry); |
934 | if (local_entry) | |
935 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
936 | } |
937 | ||
08c36d3e SE |
938 | void batadv_tt_global_del_orig(struct bat_priv *bat_priv, |
939 | struct orig_node *orig_node, const char *message) | |
c6c8fea2 | 940 | { |
a513088d | 941 | struct tt_global_entry *global_entry; |
48100bac | 942 | struct tt_common_entry *tt_common_entry; |
c90681b8 | 943 | uint32_t i; |
a73105b8 AQ |
944 | struct hashtable_t *hash = bat_priv->tt_global_hash; |
945 | struct hlist_node *node, *safe; | |
946 | struct hlist_head *head; | |
7683fdc1 | 947 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 948 | |
6e801494 SW |
949 | if (!hash) |
950 | return; | |
951 | ||
a73105b8 AQ |
952 | for (i = 0; i < hash->size; i++) { |
953 | head = &hash->table[i]; | |
7683fdc1 | 954 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 955 | |
7683fdc1 | 956 | spin_lock_bh(list_lock); |
48100bac | 957 | hlist_for_each_entry_safe(tt_common_entry, node, safe, |
7c64fd98 | 958 | head, hash_entry) { |
a513088d SE |
959 | global_entry = container_of(tt_common_entry, |
960 | struct tt_global_entry, | |
961 | common); | |
db08e6e5 | 962 | |
a513088d SE |
963 | batadv_tt_global_del_orig_entry(bat_priv, global_entry, |
964 | orig_node, message); | |
db08e6e5 | 965 | |
a513088d | 966 | if (hlist_empty(&global_entry->orig_list)) { |
1eda58bf SE |
967 | batadv_dbg(DBG_TT, bat_priv, |
968 | "Deleting global tt entry %pM: %s\n", | |
a513088d | 969 | global_entry->common.addr, message); |
7683fdc1 | 970 | hlist_del_rcu(node); |
a513088d | 971 | batadv_tt_global_entry_free_ref(global_entry); |
7683fdc1 | 972 | } |
a73105b8 | 973 | } |
7683fdc1 | 974 | spin_unlock_bh(list_lock); |
c6c8fea2 | 975 | } |
17071578 | 976 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
977 | } |
978 | ||
a513088d | 979 | static void batadv_tt_global_roam_purge(struct bat_priv *bat_priv) |
cc47f66e AQ |
980 | { |
981 | struct hashtable_t *hash = bat_priv->tt_global_hash; | |
48100bac | 982 | struct tt_common_entry *tt_common_entry; |
cc47f66e AQ |
983 | struct tt_global_entry *tt_global_entry; |
984 | struct hlist_node *node, *node_tmp; | |
985 | struct hlist_head *head; | |
7683fdc1 | 986 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 987 | uint32_t i; |
cc47f66e | 988 | |
cc47f66e AQ |
989 | for (i = 0; i < hash->size; i++) { |
990 | head = &hash->table[i]; | |
7683fdc1 | 991 | list_lock = &hash->list_locks[i]; |
cc47f66e | 992 | |
7683fdc1 | 993 | spin_lock_bh(list_lock); |
48100bac | 994 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
cc47f66e | 995 | head, hash_entry) { |
48100bac AQ |
996 | tt_global_entry = container_of(tt_common_entry, |
997 | struct tt_global_entry, | |
998 | common); | |
999 | if (!(tt_global_entry->common.flags & TT_CLIENT_ROAM)) | |
cc47f66e | 1000 | continue; |
1eda58bf SE |
1001 | if (!batadv_has_timed_out(tt_global_entry->roam_at, |
1002 | TT_CLIENT_ROAM_TIMEOUT)) | |
cc47f66e AQ |
1003 | continue; |
1004 | ||
1eda58bf SE |
1005 | batadv_dbg(DBG_TT, bat_priv, |
1006 | "Deleting global tt entry (%pM): Roaming timeout\n", | |
1007 | tt_global_entry->common.addr); | |
db08e6e5 | 1008 | |
7683fdc1 | 1009 | hlist_del_rcu(node); |
a513088d | 1010 | batadv_tt_global_entry_free_ref(tt_global_entry); |
cc47f66e | 1011 | } |
7683fdc1 | 1012 | spin_unlock_bh(list_lock); |
cc47f66e AQ |
1013 | } |
1014 | ||
cc47f66e AQ |
1015 | } |
1016 | ||
a513088d | 1017 | static void batadv_tt_global_table_free(struct bat_priv *bat_priv) |
c6c8fea2 | 1018 | { |
7683fdc1 AQ |
1019 | struct hashtable_t *hash; |
1020 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
48100bac | 1021 | struct tt_common_entry *tt_common_entry; |
7683fdc1 AQ |
1022 | struct tt_global_entry *tt_global_entry; |
1023 | struct hlist_node *node, *node_tmp; | |
1024 | struct hlist_head *head; | |
c90681b8 | 1025 | uint32_t i; |
7683fdc1 | 1026 | |
2dafb49d | 1027 | if (!bat_priv->tt_global_hash) |
c6c8fea2 SE |
1028 | return; |
1029 | ||
7683fdc1 AQ |
1030 | hash = bat_priv->tt_global_hash; |
1031 | ||
1032 | for (i = 0; i < hash->size; i++) { | |
1033 | head = &hash->table[i]; | |
1034 | list_lock = &hash->list_locks[i]; | |
1035 | ||
1036 | spin_lock_bh(list_lock); | |
48100bac | 1037 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
7683fdc1 AQ |
1038 | head, hash_entry) { |
1039 | hlist_del_rcu(node); | |
48100bac AQ |
1040 | tt_global_entry = container_of(tt_common_entry, |
1041 | struct tt_global_entry, | |
1042 | common); | |
a513088d | 1043 | batadv_tt_global_entry_free_ref(tt_global_entry); |
7683fdc1 AQ |
1044 | } |
1045 | spin_unlock_bh(list_lock); | |
1046 | } | |
1047 | ||
1a8eaf07 | 1048 | batadv_hash_destroy(hash); |
7683fdc1 | 1049 | |
2dafb49d | 1050 | bat_priv->tt_global_hash = NULL; |
c6c8fea2 SE |
1051 | } |
1052 | ||
a513088d SE |
1053 | static bool _batadv_is_ap_isolated(struct tt_local_entry *tt_local_entry, |
1054 | struct tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1055 | { |
1056 | bool ret = false; | |
1057 | ||
48100bac AQ |
1058 | if (tt_local_entry->common.flags & TT_CLIENT_WIFI && |
1059 | tt_global_entry->common.flags & TT_CLIENT_WIFI) | |
59b699cd AQ |
1060 | ret = true; |
1061 | ||
1062 | return ret; | |
1063 | } | |
1064 | ||
08c36d3e SE |
1065 | struct orig_node *batadv_transtable_search(struct bat_priv *bat_priv, |
1066 | const uint8_t *src, | |
1067 | const uint8_t *addr) | |
c6c8fea2 | 1068 | { |
3d393e47 AQ |
1069 | struct tt_local_entry *tt_local_entry = NULL; |
1070 | struct tt_global_entry *tt_global_entry = NULL; | |
7b36e8ee | 1071 | struct orig_node *orig_node = NULL; |
db08e6e5 SW |
1072 | struct neigh_node *router = NULL; |
1073 | struct hlist_head *head; | |
1074 | struct hlist_node *node; | |
1075 | struct tt_orig_list_entry *orig_entry; | |
1076 | int best_tq; | |
c6c8fea2 | 1077 | |
3d393e47 | 1078 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1079 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
3d393e47 AQ |
1080 | if (!tt_local_entry) |
1081 | goto out; | |
1082 | } | |
7aadf889 | 1083 | |
a513088d | 1084 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1085 | if (!tt_global_entry) |
7b36e8ee | 1086 | goto out; |
7aadf889 | 1087 | |
3d393e47 | 1088 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1089 | * isolation |
1090 | */ | |
a513088d SE |
1091 | if (tt_local_entry && |
1092 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1093 | goto out; |
1094 | ||
db08e6e5 | 1095 | best_tq = 0; |
c6c8fea2 | 1096 | |
db08e6e5 SW |
1097 | rcu_read_lock(); |
1098 | head = &tt_global_entry->orig_list; | |
1099 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
7d211efc | 1100 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
db08e6e5 SW |
1101 | if (!router) |
1102 | continue; | |
c6c8fea2 | 1103 | |
db08e6e5 SW |
1104 | if (router->tq_avg > best_tq) { |
1105 | orig_node = orig_entry->orig_node; | |
1106 | best_tq = router->tq_avg; | |
1107 | } | |
7d211efc | 1108 | batadv_neigh_node_free_ref(router); |
db08e6e5 SW |
1109 | } |
1110 | /* found anything? */ | |
1111 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) | |
1112 | orig_node = NULL; | |
1113 | rcu_read_unlock(); | |
7b36e8ee | 1114 | out: |
3d393e47 | 1115 | if (tt_global_entry) |
a513088d | 1116 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1117 | if (tt_local_entry) |
a513088d | 1118 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1119 | |
7b36e8ee | 1120 | return orig_node; |
c6c8fea2 | 1121 | } |
a73105b8 AQ |
1122 | |
1123 | /* Calculates the checksum of the local table of a given orig_node */ | |
a513088d SE |
1124 | static uint16_t batadv_tt_global_crc(struct bat_priv *bat_priv, |
1125 | struct orig_node *orig_node) | |
a73105b8 AQ |
1126 | { |
1127 | uint16_t total = 0, total_one; | |
1128 | struct hashtable_t *hash = bat_priv->tt_global_hash; | |
48100bac | 1129 | struct tt_common_entry *tt_common_entry; |
a73105b8 AQ |
1130 | struct tt_global_entry *tt_global_entry; |
1131 | struct hlist_node *node; | |
1132 | struct hlist_head *head; | |
c90681b8 AQ |
1133 | uint32_t i; |
1134 | int j; | |
a73105b8 AQ |
1135 | |
1136 | for (i = 0; i < hash->size; i++) { | |
1137 | head = &hash->table[i]; | |
1138 | ||
1139 | rcu_read_lock(); | |
48100bac | 1140 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 | 1141 | head, hash_entry) { |
48100bac AQ |
1142 | tt_global_entry = container_of(tt_common_entry, |
1143 | struct tt_global_entry, | |
1144 | common); | |
db08e6e5 SW |
1145 | /* Roaming clients are in the global table for |
1146 | * consistency only. They don't have to be | |
1147 | * taken into account while computing the | |
1148 | * global crc | |
1149 | */ | |
1150 | if (tt_global_entry->common.flags & TT_CLIENT_ROAM) | |
1151 | continue; | |
1152 | ||
1153 | /* find out if this global entry is announced by this | |
1154 | * originator | |
1155 | */ | |
a513088d SE |
1156 | if (!batadv_tt_global_entry_has_orig(tt_global_entry, |
1157 | orig_node)) | |
db08e6e5 SW |
1158 | continue; |
1159 | ||
1160 | total_one = 0; | |
1161 | for (j = 0; j < ETH_ALEN; j++) | |
1162 | total_one = crc16_byte(total_one, | |
1163 | tt_global_entry->common.addr[j]); | |
1164 | total ^= total_one; | |
a73105b8 AQ |
1165 | } |
1166 | rcu_read_unlock(); | |
1167 | } | |
1168 | ||
1169 | return total; | |
1170 | } | |
1171 | ||
1172 | /* Calculates the checksum of the local table */ | |
be9aa4c1 | 1173 | static uint16_t batadv_tt_local_crc(struct bat_priv *bat_priv) |
a73105b8 AQ |
1174 | { |
1175 | uint16_t total = 0, total_one; | |
1176 | struct hashtable_t *hash = bat_priv->tt_local_hash; | |
48100bac | 1177 | struct tt_common_entry *tt_common_entry; |
a73105b8 AQ |
1178 | struct hlist_node *node; |
1179 | struct hlist_head *head; | |
c90681b8 AQ |
1180 | uint32_t i; |
1181 | int j; | |
a73105b8 AQ |
1182 | |
1183 | for (i = 0; i < hash->size; i++) { | |
1184 | head = &hash->table[i]; | |
1185 | ||
1186 | rcu_read_lock(); | |
48100bac | 1187 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 | 1188 | head, hash_entry) { |
058d0e26 | 1189 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1190 | * account while computing the CRC |
1191 | */ | |
48100bac | 1192 | if (tt_common_entry->flags & TT_CLIENT_NEW) |
058d0e26 | 1193 | continue; |
a73105b8 AQ |
1194 | total_one = 0; |
1195 | for (j = 0; j < ETH_ALEN; j++) | |
1196 | total_one = crc16_byte(total_one, | |
48100bac | 1197 | tt_common_entry->addr[j]); |
a73105b8 AQ |
1198 | total ^= total_one; |
1199 | } | |
a73105b8 AQ |
1200 | rcu_read_unlock(); |
1201 | } | |
1202 | ||
1203 | return total; | |
1204 | } | |
1205 | ||
a513088d | 1206 | static void batadv_tt_req_list_free(struct bat_priv *bat_priv) |
a73105b8 AQ |
1207 | { |
1208 | struct tt_req_node *node, *safe; | |
1209 | ||
1210 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1211 | ||
1212 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
1213 | list_del(&node->list); | |
1214 | kfree(node); | |
1215 | } | |
1216 | ||
1217 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1218 | } | |
1219 | ||
a513088d SE |
1220 | static void batadv_tt_save_orig_buffer(struct bat_priv *bat_priv, |
1221 | struct orig_node *orig_node, | |
1222 | const unsigned char *tt_buff, | |
1223 | uint8_t tt_num_changes) | |
a73105b8 | 1224 | { |
08c36d3e | 1225 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
a73105b8 AQ |
1226 | |
1227 | /* Replace the old buffer only if I received something in the | |
9cfc7bd6 SE |
1228 | * last OGM (the OGM could carry no changes) |
1229 | */ | |
a73105b8 AQ |
1230 | spin_lock_bh(&orig_node->tt_buff_lock); |
1231 | if (tt_buff_len > 0) { | |
1232 | kfree(orig_node->tt_buff); | |
1233 | orig_node->tt_buff_len = 0; | |
1234 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1235 | if (orig_node->tt_buff) { | |
1236 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1237 | orig_node->tt_buff_len = tt_buff_len; | |
1238 | } | |
1239 | } | |
1240 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1241 | } | |
1242 | ||
a513088d | 1243 | static void batadv_tt_req_purge(struct bat_priv *bat_priv) |
a73105b8 AQ |
1244 | { |
1245 | struct tt_req_node *node, *safe; | |
1246 | ||
1247 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1248 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
1eda58bf | 1249 | if (batadv_has_timed_out(node->issued_at, TT_REQUEST_TIMEOUT)) { |
a73105b8 AQ |
1250 | list_del(&node->list); |
1251 | kfree(node); | |
1252 | } | |
1253 | } | |
1254 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1255 | } | |
1256 | ||
1257 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1258 | * has already been issued for this orig_node, NULL otherwise |
1259 | */ | |
a513088d SE |
1260 | static struct tt_req_node *batadv_new_tt_req_node(struct bat_priv *bat_priv, |
1261 | struct orig_node *orig_node) | |
a73105b8 AQ |
1262 | { |
1263 | struct tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; | |
1264 | ||
1265 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1266 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt_req_list, list) { | |
1eda58bf SE |
1267 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1268 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
1269 | TT_REQUEST_TIMEOUT)) | |
a73105b8 AQ |
1270 | goto unlock; |
1271 | } | |
1272 | ||
1273 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1274 | if (!tt_req_node) | |
1275 | goto unlock; | |
1276 | ||
1277 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1278 | tt_req_node->issued_at = jiffies; | |
1279 | ||
1280 | list_add(&tt_req_node->list, &bat_priv->tt_req_list); | |
1281 | unlock: | |
1282 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1283 | return tt_req_node; | |
1284 | } | |
1285 | ||
058d0e26 | 1286 | /* data_ptr is useless here, but has to be kept to respect the prototype */ |
a513088d SE |
1287 | static int batadv_tt_local_valid_entry(const void *entry_ptr, |
1288 | const void *data_ptr) | |
058d0e26 | 1289 | { |
48100bac | 1290 | const struct tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1291 | |
48100bac | 1292 | if (tt_common_entry->flags & TT_CLIENT_NEW) |
058d0e26 AQ |
1293 | return 0; |
1294 | return 1; | |
1295 | } | |
1296 | ||
a513088d SE |
1297 | static int batadv_tt_global_valid(const void *entry_ptr, |
1298 | const void *data_ptr) | |
a73105b8 | 1299 | { |
48100bac AQ |
1300 | const struct tt_common_entry *tt_common_entry = entry_ptr; |
1301 | const struct tt_global_entry *tt_global_entry; | |
a73105b8 AQ |
1302 | const struct orig_node *orig_node = data_ptr; |
1303 | ||
48100bac | 1304 | if (tt_common_entry->flags & TT_CLIENT_ROAM) |
cc47f66e AQ |
1305 | return 0; |
1306 | ||
48100bac AQ |
1307 | tt_global_entry = container_of(tt_common_entry, struct tt_global_entry, |
1308 | common); | |
1309 | ||
a513088d | 1310 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1311 | } |
1312 | ||
a513088d SE |
1313 | static struct sk_buff * |
1314 | batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, | |
1315 | struct hashtable_t *hash, | |
1316 | struct hard_iface *primary_if, | |
1317 | int (*valid_cb)(const void *, const void *), | |
1318 | void *cb_data) | |
a73105b8 | 1319 | { |
48100bac | 1320 | struct tt_common_entry *tt_common_entry; |
a73105b8 AQ |
1321 | struct tt_query_packet *tt_response; |
1322 | struct tt_change *tt_change; | |
1323 | struct hlist_node *node; | |
1324 | struct hlist_head *head; | |
1325 | struct sk_buff *skb = NULL; | |
1326 | uint16_t tt_tot, tt_count; | |
1327 | ssize_t tt_query_size = sizeof(struct tt_query_packet); | |
c90681b8 | 1328 | uint32_t i; |
a73105b8 AQ |
1329 | |
1330 | if (tt_query_size + tt_len > primary_if->soft_iface->mtu) { | |
1331 | tt_len = primary_if->soft_iface->mtu - tt_query_size; | |
1332 | tt_len -= tt_len % sizeof(struct tt_change); | |
1333 | } | |
1334 | tt_tot = tt_len / sizeof(struct tt_change); | |
1335 | ||
1336 | skb = dev_alloc_skb(tt_query_size + tt_len + ETH_HLEN); | |
1337 | if (!skb) | |
1338 | goto out; | |
1339 | ||
1340 | skb_reserve(skb, ETH_HLEN); | |
1341 | tt_response = (struct tt_query_packet *)skb_put(skb, | |
1342 | tt_query_size + tt_len); | |
1343 | tt_response->ttvn = ttvn; | |
a73105b8 AQ |
1344 | |
1345 | tt_change = (struct tt_change *)(skb->data + tt_query_size); | |
1346 | tt_count = 0; | |
1347 | ||
1348 | rcu_read_lock(); | |
1349 | for (i = 0; i < hash->size; i++) { | |
1350 | head = &hash->table[i]; | |
1351 | ||
48100bac | 1352 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 AQ |
1353 | head, hash_entry) { |
1354 | if (tt_count == tt_tot) | |
1355 | break; | |
1356 | ||
48100bac | 1357 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1358 | continue; |
1359 | ||
48100bac AQ |
1360 | memcpy(tt_change->addr, tt_common_entry->addr, |
1361 | ETH_ALEN); | |
a73105b8 AQ |
1362 | tt_change->flags = NO_FLAGS; |
1363 | ||
1364 | tt_count++; | |
1365 | tt_change++; | |
1366 | } | |
1367 | } | |
1368 | rcu_read_unlock(); | |
1369 | ||
9d852393 | 1370 | /* store in the message the number of entries we have successfully |
9cfc7bd6 SE |
1371 | * copied |
1372 | */ | |
9d852393 AQ |
1373 | tt_response->tt_data = htons(tt_count); |
1374 | ||
a73105b8 AQ |
1375 | out: |
1376 | return skb; | |
1377 | } | |
1378 | ||
a513088d SE |
1379 | static int batadv_send_tt_request(struct bat_priv *bat_priv, |
1380 | struct orig_node *dst_orig_node, | |
1381 | uint8_t ttvn, uint16_t tt_crc, | |
1382 | bool full_table) | |
a73105b8 AQ |
1383 | { |
1384 | struct sk_buff *skb = NULL; | |
1385 | struct tt_query_packet *tt_request; | |
1386 | struct neigh_node *neigh_node = NULL; | |
1387 | struct hard_iface *primary_if; | |
1388 | struct tt_req_node *tt_req_node = NULL; | |
1389 | int ret = 1; | |
1390 | ||
e5d89254 | 1391 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1392 | if (!primary_if) |
1393 | goto out; | |
1394 | ||
1395 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1396 | * reply from the same orig_node yet |
1397 | */ | |
a513088d | 1398 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1399 | if (!tt_req_node) |
1400 | goto out; | |
1401 | ||
1402 | skb = dev_alloc_skb(sizeof(struct tt_query_packet) + ETH_HLEN); | |
1403 | if (!skb) | |
1404 | goto out; | |
1405 | ||
1406 | skb_reserve(skb, ETH_HLEN); | |
1407 | ||
1408 | tt_request = (struct tt_query_packet *)skb_put(skb, | |
1409 | sizeof(struct tt_query_packet)); | |
1410 | ||
76543d14 SE |
1411 | tt_request->header.packet_type = BAT_TT_QUERY; |
1412 | tt_request->header.version = COMPAT_VERSION; | |
a73105b8 AQ |
1413 | memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1414 | memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); | |
76543d14 | 1415 | tt_request->header.ttl = TTL; |
a73105b8 | 1416 | tt_request->ttvn = ttvn; |
6d2003fc | 1417 | tt_request->tt_data = htons(tt_crc); |
a73105b8 AQ |
1418 | tt_request->flags = TT_REQUEST; |
1419 | ||
1420 | if (full_table) | |
1421 | tt_request->flags |= TT_FULL_TABLE; | |
1422 | ||
7d211efc | 1423 | neigh_node = batadv_orig_node_get_router(dst_orig_node); |
a73105b8 AQ |
1424 | if (!neigh_node) |
1425 | goto out; | |
1426 | ||
1eda58bf SE |
1427 | batadv_dbg(DBG_TT, bat_priv, |
1428 | "Sending TT_REQUEST to %pM via %pM [%c]\n", | |
1429 | dst_orig_node->orig, neigh_node->addr, | |
1430 | (full_table ? 'F' : '.')); | |
a73105b8 | 1431 | |
f8214865 MH |
1432 | batadv_inc_counter(bat_priv, BAT_CNT_TT_REQUEST_TX); |
1433 | ||
9455e34c | 1434 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1435 | ret = 0; |
1436 | ||
1437 | out: | |
1438 | if (neigh_node) | |
7d211efc | 1439 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1440 | if (primary_if) |
e5d89254 | 1441 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1442 | if (ret) |
1443 | kfree_skb(skb); | |
1444 | if (ret && tt_req_node) { | |
1445 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1446 | list_del(&tt_req_node->list); | |
1447 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1448 | kfree(tt_req_node); | |
1449 | } | |
1450 | return ret; | |
1451 | } | |
1452 | ||
a513088d SE |
1453 | static bool batadv_send_other_tt_response(struct bat_priv *bat_priv, |
1454 | struct tt_query_packet *tt_request) | |
a73105b8 AQ |
1455 | { |
1456 | struct orig_node *req_dst_orig_node = NULL, *res_dst_orig_node = NULL; | |
1457 | struct neigh_node *neigh_node = NULL; | |
1458 | struct hard_iface *primary_if = NULL; | |
1459 | uint8_t orig_ttvn, req_ttvn, ttvn; | |
1460 | int ret = false; | |
1461 | unsigned char *tt_buff; | |
1462 | bool full_table; | |
1463 | uint16_t tt_len, tt_tot; | |
1464 | struct sk_buff *skb = NULL; | |
1465 | struct tt_query_packet *tt_response; | |
1466 | ||
1eda58bf SE |
1467 | batadv_dbg(DBG_TT, bat_priv, |
1468 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", | |
1469 | tt_request->src, tt_request->ttvn, tt_request->dst, | |
1470 | (tt_request->flags & TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
1471 | |
1472 | /* Let's get the orig node of the REAL destination */ | |
da641193 | 1473 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); |
a73105b8 AQ |
1474 | if (!req_dst_orig_node) |
1475 | goto out; | |
1476 | ||
da641193 | 1477 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1478 | if (!res_dst_orig_node) |
1479 | goto out; | |
1480 | ||
7d211efc | 1481 | neigh_node = batadv_orig_node_get_router(res_dst_orig_node); |
a73105b8 AQ |
1482 | if (!neigh_node) |
1483 | goto out; | |
1484 | ||
e5d89254 | 1485 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1486 | if (!primary_if) |
1487 | goto out; | |
1488 | ||
1489 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); | |
1490 | req_ttvn = tt_request->ttvn; | |
1491 | ||
015758d0 | 1492 | /* I don't have the requested data */ |
a73105b8 | 1493 | if (orig_ttvn != req_ttvn || |
f25bd58a | 1494 | tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1495 | goto out; |
1496 | ||
015758d0 | 1497 | /* If the full table has been explicitly requested */ |
a73105b8 AQ |
1498 | if (tt_request->flags & TT_FULL_TABLE || |
1499 | !req_dst_orig_node->tt_buff) | |
1500 | full_table = true; | |
1501 | else | |
1502 | full_table = false; | |
1503 | ||
1504 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1505 | * I'll send only one packet with as much TT entries as I can |
1506 | */ | |
a73105b8 AQ |
1507 | if (!full_table) { |
1508 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1509 | tt_len = req_dst_orig_node->tt_buff_len; | |
1510 | tt_tot = tt_len / sizeof(struct tt_change); | |
1511 | ||
1512 | skb = dev_alloc_skb(sizeof(struct tt_query_packet) + | |
1513 | tt_len + ETH_HLEN); | |
1514 | if (!skb) | |
1515 | goto unlock; | |
1516 | ||
1517 | skb_reserve(skb, ETH_HLEN); | |
1518 | tt_response = (struct tt_query_packet *)skb_put(skb, | |
1519 | sizeof(struct tt_query_packet) + tt_len); | |
1520 | tt_response->ttvn = req_ttvn; | |
1521 | tt_response->tt_data = htons(tt_tot); | |
1522 | ||
1523 | tt_buff = skb->data + sizeof(struct tt_query_packet); | |
1524 | /* Copy the last orig_node's OGM buffer */ | |
1525 | memcpy(tt_buff, req_dst_orig_node->tt_buff, | |
1526 | req_dst_orig_node->tt_buff_len); | |
1527 | ||
1528 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1529 | } else { | |
1530 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size) * | |
1531 | sizeof(struct tt_change); | |
1532 | ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); | |
1533 | ||
a513088d SE |
1534 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
1535 | bat_priv->tt_global_hash, | |
1536 | primary_if, | |
1537 | batadv_tt_global_valid, | |
1538 | req_dst_orig_node); | |
a73105b8 AQ |
1539 | if (!skb) |
1540 | goto out; | |
1541 | ||
1542 | tt_response = (struct tt_query_packet *)skb->data; | |
1543 | } | |
1544 | ||
76543d14 SE |
1545 | tt_response->header.packet_type = BAT_TT_QUERY; |
1546 | tt_response->header.version = COMPAT_VERSION; | |
1547 | tt_response->header.ttl = TTL; | |
a73105b8 AQ |
1548 | memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); |
1549 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
1550 | tt_response->flags = TT_RESPONSE; | |
1551 | ||
1552 | if (full_table) | |
1553 | tt_response->flags |= TT_FULL_TABLE; | |
1554 | ||
1eda58bf SE |
1555 | batadv_dbg(DBG_TT, bat_priv, |
1556 | "Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n", | |
1557 | res_dst_orig_node->orig, neigh_node->addr, | |
1558 | req_dst_orig_node->orig, req_ttvn); | |
a73105b8 | 1559 | |
f8214865 MH |
1560 | batadv_inc_counter(bat_priv, BAT_CNT_TT_RESPONSE_TX); |
1561 | ||
9455e34c | 1562 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1563 | ret = true; |
1564 | goto out; | |
1565 | ||
1566 | unlock: | |
1567 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1568 | ||
1569 | out: | |
1570 | if (res_dst_orig_node) | |
7d211efc | 1571 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1572 | if (req_dst_orig_node) |
7d211efc | 1573 | batadv_orig_node_free_ref(req_dst_orig_node); |
a73105b8 | 1574 | if (neigh_node) |
7d211efc | 1575 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1576 | if (primary_if) |
e5d89254 | 1577 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1578 | if (!ret) |
1579 | kfree_skb(skb); | |
1580 | return ret; | |
1581 | ||
1582 | } | |
a513088d SE |
1583 | static bool batadv_send_my_tt_response(struct bat_priv *bat_priv, |
1584 | struct tt_query_packet *tt_request) | |
a73105b8 AQ |
1585 | { |
1586 | struct orig_node *orig_node = NULL; | |
1587 | struct neigh_node *neigh_node = NULL; | |
1588 | struct hard_iface *primary_if = NULL; | |
1589 | uint8_t my_ttvn, req_ttvn, ttvn; | |
1590 | int ret = false; | |
1591 | unsigned char *tt_buff; | |
1592 | bool full_table; | |
1593 | uint16_t tt_len, tt_tot; | |
1594 | struct sk_buff *skb = NULL; | |
1595 | struct tt_query_packet *tt_response; | |
1596 | ||
1eda58bf SE |
1597 | batadv_dbg(DBG_TT, bat_priv, |
1598 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", | |
1599 | tt_request->src, tt_request->ttvn, | |
1600 | (tt_request->flags & TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 AQ |
1601 | |
1602 | ||
1603 | my_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn); | |
1604 | req_ttvn = tt_request->ttvn; | |
1605 | ||
da641193 | 1606 | orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1607 | if (!orig_node) |
1608 | goto out; | |
1609 | ||
7d211efc | 1610 | neigh_node = batadv_orig_node_get_router(orig_node); |
a73105b8 AQ |
1611 | if (!neigh_node) |
1612 | goto out; | |
1613 | ||
e5d89254 | 1614 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1615 | if (!primary_if) |
1616 | goto out; | |
1617 | ||
1618 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1619 | * is too big send the whole local translation table |
1620 | */ | |
a73105b8 AQ |
1621 | if (tt_request->flags & TT_FULL_TABLE || my_ttvn != req_ttvn || |
1622 | !bat_priv->tt_buff) | |
1623 | full_table = true; | |
1624 | else | |
1625 | full_table = false; | |
1626 | ||
1627 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1628 | * I'll send only one packet with as much TT entries as I can |
1629 | */ | |
a73105b8 AQ |
1630 | if (!full_table) { |
1631 | spin_lock_bh(&bat_priv->tt_buff_lock); | |
1632 | tt_len = bat_priv->tt_buff_len; | |
1633 | tt_tot = tt_len / sizeof(struct tt_change); | |
1634 | ||
1635 | skb = dev_alloc_skb(sizeof(struct tt_query_packet) + | |
1636 | tt_len + ETH_HLEN); | |
1637 | if (!skb) | |
1638 | goto unlock; | |
1639 | ||
1640 | skb_reserve(skb, ETH_HLEN); | |
1641 | tt_response = (struct tt_query_packet *)skb_put(skb, | |
1642 | sizeof(struct tt_query_packet) + tt_len); | |
1643 | tt_response->ttvn = req_ttvn; | |
1644 | tt_response->tt_data = htons(tt_tot); | |
1645 | ||
1646 | tt_buff = skb->data + sizeof(struct tt_query_packet); | |
1647 | memcpy(tt_buff, bat_priv->tt_buff, | |
1648 | bat_priv->tt_buff_len); | |
1649 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
1650 | } else { | |
1651 | tt_len = (uint16_t)atomic_read(&bat_priv->num_local_tt) * | |
1652 | sizeof(struct tt_change); | |
1653 | ttvn = (uint8_t)atomic_read(&bat_priv->ttvn); | |
1654 | ||
a513088d SE |
1655 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
1656 | bat_priv->tt_local_hash, | |
1657 | primary_if, | |
1658 | batadv_tt_local_valid_entry, | |
1659 | NULL); | |
a73105b8 AQ |
1660 | if (!skb) |
1661 | goto out; | |
1662 | ||
1663 | tt_response = (struct tt_query_packet *)skb->data; | |
1664 | } | |
1665 | ||
76543d14 SE |
1666 | tt_response->header.packet_type = BAT_TT_QUERY; |
1667 | tt_response->header.version = COMPAT_VERSION; | |
1668 | tt_response->header.ttl = TTL; | |
a73105b8 AQ |
1669 | memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1670 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
1671 | tt_response->flags = TT_RESPONSE; | |
1672 | ||
1673 | if (full_table) | |
1674 | tt_response->flags |= TT_FULL_TABLE; | |
1675 | ||
1eda58bf SE |
1676 | batadv_dbg(DBG_TT, bat_priv, |
1677 | "Sending TT_RESPONSE to %pM via %pM [%c]\n", | |
1678 | orig_node->orig, neigh_node->addr, | |
1679 | (tt_response->flags & TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 1680 | |
f8214865 MH |
1681 | batadv_inc_counter(bat_priv, BAT_CNT_TT_RESPONSE_TX); |
1682 | ||
9455e34c | 1683 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1684 | ret = true; |
1685 | goto out; | |
1686 | ||
1687 | unlock: | |
1688 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
1689 | out: | |
1690 | if (orig_node) | |
7d211efc | 1691 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1692 | if (neigh_node) |
7d211efc | 1693 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1694 | if (primary_if) |
e5d89254 | 1695 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1696 | if (!ret) |
1697 | kfree_skb(skb); | |
1698 | /* This packet was for me, so it doesn't need to be re-routed */ | |
1699 | return true; | |
1700 | } | |
1701 | ||
08c36d3e SE |
1702 | bool batadv_send_tt_response(struct bat_priv *bat_priv, |
1703 | struct tt_query_packet *tt_request) | |
a73105b8 | 1704 | { |
3193e8fd | 1705 | if (batadv_is_my_mac(tt_request->dst)) { |
20ff9d59 | 1706 | /* don't answer backbone gws! */ |
08adf151 | 1707 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) |
20ff9d59 SW |
1708 | return true; |
1709 | ||
a513088d | 1710 | return batadv_send_my_tt_response(bat_priv, tt_request); |
20ff9d59 | 1711 | } else { |
a513088d | 1712 | return batadv_send_other_tt_response(bat_priv, tt_request); |
20ff9d59 | 1713 | } |
a73105b8 AQ |
1714 | } |
1715 | ||
a513088d SE |
1716 | static void _batadv_tt_update_changes(struct bat_priv *bat_priv, |
1717 | struct orig_node *orig_node, | |
1718 | struct tt_change *tt_change, | |
1719 | uint16_t tt_num_changes, uint8_t ttvn) | |
a73105b8 AQ |
1720 | { |
1721 | int i; | |
08c36d3e | 1722 | int is_wifi; |
a513088d | 1723 | int roams; |
a73105b8 AQ |
1724 | |
1725 | for (i = 0; i < tt_num_changes; i++) { | |
08c36d3e | 1726 | if ((tt_change + i)->flags & TT_CLIENT_DEL) { |
a513088d SE |
1727 | roams = (tt_change + i)->flags & TT_CLIENT_ROAM; |
1728 | batadv_tt_global_del(bat_priv, orig_node, | |
1729 | (tt_change + i)->addr, | |
1730 | "tt removed by changes", | |
1731 | roams); | |
08c36d3e SE |
1732 | } else { |
1733 | is_wifi = (tt_change + i)->flags & TT_CLIENT_WIFI; | |
1734 | if (!batadv_tt_global_add(bat_priv, orig_node, | |
1735 | (tt_change + i)->addr, ttvn, | |
1736 | false, is_wifi)) | |
a73105b8 AQ |
1737 | /* In case of problem while storing a |
1738 | * global_entry, we stop the updating | |
1739 | * procedure without committing the | |
1740 | * ttvn change. This will avoid to send | |
1741 | * corrupted data on tt_request | |
1742 | */ | |
1743 | return; | |
08c36d3e | 1744 | } |
a73105b8 | 1745 | } |
17071578 | 1746 | orig_node->tt_initialised = true; |
a73105b8 AQ |
1747 | } |
1748 | ||
a513088d SE |
1749 | static void batadv_tt_fill_gtable(struct bat_priv *bat_priv, |
1750 | struct tt_query_packet *tt_response) | |
a73105b8 AQ |
1751 | { |
1752 | struct orig_node *orig_node = NULL; | |
1753 | ||
da641193 | 1754 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1755 | if (!orig_node) |
1756 | goto out; | |
1757 | ||
1758 | /* Purge the old table first.. */ | |
08c36d3e | 1759 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 1760 | |
a513088d SE |
1761 | _batadv_tt_update_changes(bat_priv, orig_node, |
1762 | (struct tt_change *)(tt_response + 1), | |
1763 | ntohs(tt_response->tt_data), | |
1764 | tt_response->ttvn); | |
a73105b8 AQ |
1765 | |
1766 | spin_lock_bh(&orig_node->tt_buff_lock); | |
1767 | kfree(orig_node->tt_buff); | |
1768 | orig_node->tt_buff_len = 0; | |
1769 | orig_node->tt_buff = NULL; | |
1770 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1771 | ||
1772 | atomic_set(&orig_node->last_ttvn, tt_response->ttvn); | |
1773 | ||
1774 | out: | |
1775 | if (orig_node) | |
7d211efc | 1776 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
1777 | } |
1778 | ||
a513088d SE |
1779 | static void batadv_tt_update_changes(struct bat_priv *bat_priv, |
1780 | struct orig_node *orig_node, | |
1781 | uint16_t tt_num_changes, uint8_t ttvn, | |
1782 | struct tt_change *tt_change) | |
a73105b8 | 1783 | { |
a513088d SE |
1784 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
1785 | tt_num_changes, ttvn); | |
a73105b8 | 1786 | |
a513088d SE |
1787 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
1788 | (unsigned char *)tt_change, tt_num_changes); | |
a73105b8 AQ |
1789 | atomic_set(&orig_node->last_ttvn, ttvn); |
1790 | } | |
1791 | ||
08c36d3e | 1792 | bool batadv_is_my_client(struct bat_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 1793 | { |
7683fdc1 AQ |
1794 | struct tt_local_entry *tt_local_entry = NULL; |
1795 | bool ret = false; | |
a73105b8 | 1796 | |
a513088d | 1797 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
1798 | if (!tt_local_entry) |
1799 | goto out; | |
058d0e26 | 1800 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
1801 | * consistency purpose) |
1802 | */ | |
48100bac | 1803 | if (tt_local_entry->common.flags & TT_CLIENT_PENDING) |
058d0e26 | 1804 | goto out; |
7683fdc1 AQ |
1805 | ret = true; |
1806 | out: | |
a73105b8 | 1807 | if (tt_local_entry) |
a513088d | 1808 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 1809 | return ret; |
a73105b8 AQ |
1810 | } |
1811 | ||
08c36d3e SE |
1812 | void batadv_handle_tt_response(struct bat_priv *bat_priv, |
1813 | struct tt_query_packet *tt_response) | |
a73105b8 AQ |
1814 | { |
1815 | struct tt_req_node *node, *safe; | |
1816 | struct orig_node *orig_node = NULL; | |
1817 | ||
1eda58bf SE |
1818 | batadv_dbg(DBG_TT, bat_priv, |
1819 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", | |
1820 | tt_response->src, tt_response->ttvn, | |
1821 | ntohs(tt_response->tt_data), | |
1822 | (tt_response->flags & TT_FULL_TABLE ? 'F' : '.')); | |
a73105b8 | 1823 | |
20ff9d59 | 1824 | /* we should have never asked a backbone gw */ |
08adf151 | 1825 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) |
20ff9d59 SW |
1826 | goto out; |
1827 | ||
da641193 | 1828 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1829 | if (!orig_node) |
1830 | goto out; | |
1831 | ||
1832 | if (tt_response->flags & TT_FULL_TABLE) | |
a513088d | 1833 | batadv_tt_fill_gtable(bat_priv, tt_response); |
a73105b8 | 1834 | else |
a513088d SE |
1835 | batadv_tt_update_changes(bat_priv, orig_node, |
1836 | ntohs(tt_response->tt_data), | |
1837 | tt_response->ttvn, | |
1838 | (struct tt_change *)(tt_response + 1)); | |
a73105b8 AQ |
1839 | |
1840 | /* Delete the tt_req_node from pending tt_requests list */ | |
1841 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1842 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
1eda58bf | 1843 | if (!batadv_compare_eth(node->addr, tt_response->src)) |
a73105b8 AQ |
1844 | continue; |
1845 | list_del(&node->list); | |
1846 | kfree(node); | |
1847 | } | |
1848 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1849 | ||
1850 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 1851 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
cc47f66e | 1852 | /* Roaming phase is over: tables are in sync again. I can |
9cfc7bd6 SE |
1853 | * unset the flag |
1854 | */ | |
cc47f66e | 1855 | orig_node->tt_poss_change = false; |
a73105b8 AQ |
1856 | out: |
1857 | if (orig_node) | |
7d211efc | 1858 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
1859 | } |
1860 | ||
08c36d3e | 1861 | int batadv_tt_init(struct bat_priv *bat_priv) |
a73105b8 | 1862 | { |
5346c35e | 1863 | int ret; |
a73105b8 | 1864 | |
a513088d | 1865 | ret = batadv_tt_local_init(bat_priv); |
5346c35e SE |
1866 | if (ret < 0) |
1867 | return ret; | |
1868 | ||
a513088d | 1869 | ret = batadv_tt_global_init(bat_priv); |
5346c35e SE |
1870 | if (ret < 0) |
1871 | return ret; | |
a73105b8 | 1872 | |
a513088d | 1873 | batadv_tt_start_timer(bat_priv); |
a73105b8 AQ |
1874 | |
1875 | return 1; | |
1876 | } | |
1877 | ||
a513088d | 1878 | static void batadv_tt_roam_list_free(struct bat_priv *bat_priv) |
a73105b8 | 1879 | { |
cc47f66e | 1880 | struct tt_roam_node *node, *safe; |
a73105b8 | 1881 | |
cc47f66e | 1882 | spin_lock_bh(&bat_priv->tt_roam_list_lock); |
a73105b8 | 1883 | |
cc47f66e AQ |
1884 | list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) { |
1885 | list_del(&node->list); | |
1886 | kfree(node); | |
1887 | } | |
1888 | ||
1889 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
1890 | } | |
1891 | ||
a513088d | 1892 | static void batadv_tt_roam_purge(struct bat_priv *bat_priv) |
cc47f66e AQ |
1893 | { |
1894 | struct tt_roam_node *node, *safe; | |
1895 | ||
1896 | spin_lock_bh(&bat_priv->tt_roam_list_lock); | |
1897 | list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) { | |
1eda58bf | 1898 | if (!batadv_has_timed_out(node->first_time, ROAMING_MAX_TIME)) |
cc47f66e AQ |
1899 | continue; |
1900 | ||
1901 | list_del(&node->list); | |
1902 | kfree(node); | |
1903 | } | |
1904 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
1905 | } | |
1906 | ||
1907 | /* This function checks whether the client already reached the | |
1908 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
1909 | * will not be sent. | |
1910 | * | |
9cfc7bd6 SE |
1911 | * returns true if the ROAMING_ADV can be sent, false otherwise |
1912 | */ | |
a513088d SE |
1913 | static bool batadv_tt_check_roam_count(struct bat_priv *bat_priv, |
1914 | uint8_t *client) | |
cc47f66e AQ |
1915 | { |
1916 | struct tt_roam_node *tt_roam_node; | |
1917 | bool ret = false; | |
1918 | ||
1919 | spin_lock_bh(&bat_priv->tt_roam_list_lock); | |
1920 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1921 | * reply from the same orig_node yet |
1922 | */ | |
cc47f66e | 1923 | list_for_each_entry(tt_roam_node, &bat_priv->tt_roam_list, list) { |
1eda58bf | 1924 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
1925 | continue; |
1926 | ||
1eda58bf SE |
1927 | if (batadv_has_timed_out(tt_roam_node->first_time, |
1928 | ROAMING_MAX_TIME)) | |
cc47f66e AQ |
1929 | continue; |
1930 | ||
1931 | if (!atomic_dec_not_zero(&tt_roam_node->counter)) | |
1932 | /* Sorry, you roamed too many times! */ | |
1933 | goto unlock; | |
1934 | ret = true; | |
1935 | break; | |
1936 | } | |
1937 | ||
1938 | if (!ret) { | |
1939 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
1940 | if (!tt_roam_node) | |
1941 | goto unlock; | |
1942 | ||
1943 | tt_roam_node->first_time = jiffies; | |
1944 | atomic_set(&tt_roam_node->counter, ROAMING_MAX_COUNT - 1); | |
1945 | memcpy(tt_roam_node->addr, client, ETH_ALEN); | |
1946 | ||
1947 | list_add(&tt_roam_node->list, &bat_priv->tt_roam_list); | |
1948 | ret = true; | |
1949 | } | |
1950 | ||
1951 | unlock: | |
1952 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
1953 | return ret; | |
1954 | } | |
1955 | ||
a513088d SE |
1956 | static void batadv_send_roam_adv(struct bat_priv *bat_priv, uint8_t *client, |
1957 | struct orig_node *orig_node) | |
cc47f66e AQ |
1958 | { |
1959 | struct neigh_node *neigh_node = NULL; | |
1960 | struct sk_buff *skb = NULL; | |
1961 | struct roam_adv_packet *roam_adv_packet; | |
1962 | int ret = 1; | |
1963 | struct hard_iface *primary_if; | |
1964 | ||
1965 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
1966 | * already roamed to us too many times |
1967 | */ | |
a513088d | 1968 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
1969 | goto out; |
1970 | ||
1971 | skb = dev_alloc_skb(sizeof(struct roam_adv_packet) + ETH_HLEN); | |
1972 | if (!skb) | |
1973 | goto out; | |
1974 | ||
1975 | skb_reserve(skb, ETH_HLEN); | |
1976 | ||
1977 | roam_adv_packet = (struct roam_adv_packet *)skb_put(skb, | |
1978 | sizeof(struct roam_adv_packet)); | |
1979 | ||
76543d14 SE |
1980 | roam_adv_packet->header.packet_type = BAT_ROAM_ADV; |
1981 | roam_adv_packet->header.version = COMPAT_VERSION; | |
1982 | roam_adv_packet->header.ttl = TTL; | |
e5d89254 | 1983 | primary_if = batadv_primary_if_get_selected(bat_priv); |
cc47f66e AQ |
1984 | if (!primary_if) |
1985 | goto out; | |
1986 | memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
e5d89254 | 1987 | batadv_hardif_free_ref(primary_if); |
cc47f66e AQ |
1988 | memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); |
1989 | memcpy(roam_adv_packet->client, client, ETH_ALEN); | |
1990 | ||
7d211efc | 1991 | neigh_node = batadv_orig_node_get_router(orig_node); |
cc47f66e AQ |
1992 | if (!neigh_node) |
1993 | goto out; | |
1994 | ||
1eda58bf SE |
1995 | batadv_dbg(DBG_TT, bat_priv, |
1996 | "Sending ROAMING_ADV to %pM (client %pM) via %pM\n", | |
1997 | orig_node->orig, client, neigh_node->addr); | |
cc47f66e | 1998 | |
f8214865 MH |
1999 | batadv_inc_counter(bat_priv, BAT_CNT_TT_ROAM_ADV_TX); |
2000 | ||
9455e34c | 2001 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
cc47f66e AQ |
2002 | ret = 0; |
2003 | ||
2004 | out: | |
2005 | if (neigh_node) | |
7d211efc | 2006 | batadv_neigh_node_free_ref(neigh_node); |
cc47f66e AQ |
2007 | if (ret) |
2008 | kfree_skb(skb); | |
2009 | return; | |
a73105b8 AQ |
2010 | } |
2011 | ||
a513088d | 2012 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 AQ |
2013 | { |
2014 | struct delayed_work *delayed_work = | |
2015 | container_of(work, struct delayed_work, work); | |
2016 | struct bat_priv *bat_priv = | |
2017 | container_of(delayed_work, struct bat_priv, tt_work); | |
2018 | ||
a513088d SE |
2019 | batadv_tt_local_purge(bat_priv); |
2020 | batadv_tt_global_roam_purge(bat_priv); | |
2021 | batadv_tt_req_purge(bat_priv); | |
2022 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2023 | |
a513088d | 2024 | batadv_tt_start_timer(bat_priv); |
a73105b8 | 2025 | } |
cc47f66e | 2026 | |
08c36d3e | 2027 | void batadv_tt_free(struct bat_priv *bat_priv) |
cc47f66e AQ |
2028 | { |
2029 | cancel_delayed_work_sync(&bat_priv->tt_work); | |
2030 | ||
a513088d SE |
2031 | batadv_tt_local_table_free(bat_priv); |
2032 | batadv_tt_global_table_free(bat_priv); | |
2033 | batadv_tt_req_list_free(bat_priv); | |
2034 | batadv_tt_changes_list_free(bat_priv); | |
2035 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e AQ |
2036 | |
2037 | kfree(bat_priv->tt_buff); | |
2038 | } | |
058d0e26 | 2039 | |
697f2531 | 2040 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2041 | * in the given hash table and returns the number of modified entries |
2042 | */ | |
a513088d SE |
2043 | static uint16_t batadv_tt_set_flags(struct hashtable_t *hash, uint16_t flags, |
2044 | bool enable) | |
058d0e26 | 2045 | { |
c90681b8 | 2046 | uint32_t i; |
697f2531 | 2047 | uint16_t changed_num = 0; |
058d0e26 AQ |
2048 | struct hlist_head *head; |
2049 | struct hlist_node *node; | |
48100bac | 2050 | struct tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2051 | |
2052 | if (!hash) | |
697f2531 | 2053 | goto out; |
058d0e26 AQ |
2054 | |
2055 | for (i = 0; i < hash->size; i++) { | |
2056 | head = &hash->table[i]; | |
2057 | ||
2058 | rcu_read_lock(); | |
48100bac | 2059 | hlist_for_each_entry_rcu(tt_common_entry, node, |
058d0e26 | 2060 | head, hash_entry) { |
697f2531 AQ |
2061 | if (enable) { |
2062 | if ((tt_common_entry->flags & flags) == flags) | |
2063 | continue; | |
2064 | tt_common_entry->flags |= flags; | |
2065 | } else { | |
2066 | if (!(tt_common_entry->flags & flags)) | |
2067 | continue; | |
2068 | tt_common_entry->flags &= ~flags; | |
2069 | } | |
2070 | changed_num++; | |
058d0e26 AQ |
2071 | } |
2072 | rcu_read_unlock(); | |
2073 | } | |
697f2531 AQ |
2074 | out: |
2075 | return changed_num; | |
058d0e26 AQ |
2076 | } |
2077 | ||
2078 | /* Purge out all the tt local entries marked with TT_CLIENT_PENDING */ | |
a513088d | 2079 | static void batadv_tt_local_purge_pending_clients(struct bat_priv *bat_priv) |
058d0e26 AQ |
2080 | { |
2081 | struct hashtable_t *hash = bat_priv->tt_local_hash; | |
48100bac | 2082 | struct tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2083 | struct tt_local_entry *tt_local_entry; |
2084 | struct hlist_node *node, *node_tmp; | |
2085 | struct hlist_head *head; | |
2086 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2087 | uint32_t i; |
058d0e26 AQ |
2088 | |
2089 | if (!hash) | |
2090 | return; | |
2091 | ||
2092 | for (i = 0; i < hash->size; i++) { | |
2093 | head = &hash->table[i]; | |
2094 | list_lock = &hash->list_locks[i]; | |
2095 | ||
2096 | spin_lock_bh(list_lock); | |
48100bac | 2097 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
058d0e26 | 2098 | head, hash_entry) { |
48100bac | 2099 | if (!(tt_common_entry->flags & TT_CLIENT_PENDING)) |
058d0e26 AQ |
2100 | continue; |
2101 | ||
1eda58bf SE |
2102 | batadv_dbg(DBG_TT, bat_priv, |
2103 | "Deleting local tt entry (%pM): pending\n", | |
2104 | tt_common_entry->addr); | |
058d0e26 AQ |
2105 | |
2106 | atomic_dec(&bat_priv->num_local_tt); | |
2107 | hlist_del_rcu(node); | |
48100bac AQ |
2108 | tt_local_entry = container_of(tt_common_entry, |
2109 | struct tt_local_entry, | |
2110 | common); | |
a513088d | 2111 | batadv_tt_local_entry_free_ref(tt_local_entry); |
058d0e26 AQ |
2112 | } |
2113 | spin_unlock_bh(list_lock); | |
2114 | } | |
2115 | ||
2116 | } | |
2117 | ||
a513088d SE |
2118 | static int batadv_tt_commit_changes(struct bat_priv *bat_priv, |
2119 | unsigned char **packet_buff, | |
2120 | int *packet_buff_len, int packet_min_len) | |
058d0e26 | 2121 | { |
be9aa4c1 ML |
2122 | uint16_t changed_num = 0; |
2123 | ||
2124 | if (atomic_read(&bat_priv->tt_local_changes) < 1) | |
2125 | return -ENOENT; | |
2126 | ||
a513088d SE |
2127 | changed_num = batadv_tt_set_flags(bat_priv->tt_local_hash, |
2128 | TT_CLIENT_NEW, false); | |
be9aa4c1 ML |
2129 | |
2130 | /* all reset entries have to be counted as local entries */ | |
697f2531 | 2131 | atomic_add(changed_num, &bat_priv->num_local_tt); |
a513088d | 2132 | batadv_tt_local_purge_pending_clients(bat_priv); |
be9aa4c1 | 2133 | bat_priv->tt_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2134 | |
2135 | /* Increment the TTVN only once per OGM interval */ | |
2136 | atomic_inc(&bat_priv->ttvn); | |
1eda58bf SE |
2137 | batadv_dbg(DBG_TT, bat_priv, |
2138 | "Local changes committed, updating to ttvn %u\n", | |
2139 | (uint8_t)atomic_read(&bat_priv->ttvn)); | |
058d0e26 | 2140 | bat_priv->tt_poss_change = false; |
be9aa4c1 ML |
2141 | |
2142 | /* reset the sending counter */ | |
2143 | atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX); | |
2144 | ||
a513088d SE |
2145 | return batadv_tt_changes_fill_buff(bat_priv, packet_buff, |
2146 | packet_buff_len, packet_min_len); | |
be9aa4c1 ML |
2147 | } |
2148 | ||
2149 | /* when calling this function (hard_iface == primary_if) has to be true */ | |
2150 | int batadv_tt_append_diff(struct bat_priv *bat_priv, | |
2151 | unsigned char **packet_buff, int *packet_buff_len, | |
2152 | int packet_min_len) | |
2153 | { | |
2154 | int tt_num_changes; | |
2155 | ||
2156 | /* if at least one change happened */ | |
a513088d SE |
2157 | tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, |
2158 | packet_buff_len, | |
2159 | packet_min_len); | |
be9aa4c1 ML |
2160 | |
2161 | /* if the changes have been sent often enough */ | |
2162 | if ((tt_num_changes < 0) && | |
2163 | (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))) { | |
a513088d SE |
2164 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
2165 | packet_min_len, packet_min_len); | |
be9aa4c1 ML |
2166 | tt_num_changes = 0; |
2167 | } | |
2168 | ||
2169 | return tt_num_changes; | |
058d0e26 | 2170 | } |
59b699cd | 2171 | |
08c36d3e SE |
2172 | bool batadv_is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, |
2173 | uint8_t *dst) | |
59b699cd AQ |
2174 | { |
2175 | struct tt_local_entry *tt_local_entry = NULL; | |
2176 | struct tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2177 | bool ret = false; |
59b699cd AQ |
2178 | |
2179 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2180 | goto out; |
59b699cd | 2181 | |
a513088d | 2182 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2183 | if (!tt_local_entry) |
2184 | goto out; | |
2185 | ||
a513088d | 2186 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2187 | if (!tt_global_entry) |
2188 | goto out; | |
2189 | ||
a513088d | 2190 | if (_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2191 | goto out; |
2192 | ||
5870adc6 | 2193 | ret = true; |
59b699cd AQ |
2194 | |
2195 | out: | |
2196 | if (tt_global_entry) | |
a513088d | 2197 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2198 | if (tt_local_entry) |
a513088d | 2199 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2200 | return ret; |
2201 | } | |
a943cac1 | 2202 | |
08c36d3e SE |
2203 | void batadv_tt_update_orig(struct bat_priv *bat_priv, |
2204 | struct orig_node *orig_node, | |
2205 | const unsigned char *tt_buff, uint8_t tt_num_changes, | |
2206 | uint8_t ttvn, uint16_t tt_crc) | |
a943cac1 ML |
2207 | { |
2208 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2209 | bool full_table = true; | |
2210 | ||
20ff9d59 | 2211 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2212 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2213 | return; |
2214 | ||
17071578 | 2215 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2216 | * increased by one -> we can apply the attached changes |
2217 | */ | |
17071578 AQ |
2218 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2219 | ttvn - orig_ttvn == 1) { | |
a943cac1 ML |
2220 | /* the OGM could not contain the changes due to their size or |
2221 | * because they have already been sent TT_OGM_APPEND_MAX times. | |
9cfc7bd6 SE |
2222 | * In this case send a tt request |
2223 | */ | |
a943cac1 ML |
2224 | if (!tt_num_changes) { |
2225 | full_table = false; | |
2226 | goto request_table; | |
2227 | } | |
2228 | ||
a513088d SE |
2229 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
2230 | ttvn, (struct tt_change *)tt_buff); | |
a943cac1 ML |
2231 | |
2232 | /* Even if we received the precomputed crc with the OGM, we | |
2233 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2234 | * in the global table |
2235 | */ | |
a513088d | 2236 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2237 | |
2238 | /* The ttvn alone is not enough to guarantee consistency | |
2239 | * because a single value could represent different states | |
2240 | * (due to the wrap around). Thus a node has to check whether | |
2241 | * the resulting table (after applying the changes) is still | |
2242 | * consistent or not. E.g. a node could disconnect while its | |
2243 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2244 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2245 | * inconsistency |
2246 | */ | |
a943cac1 ML |
2247 | if (orig_node->tt_crc != tt_crc) |
2248 | goto request_table; | |
2249 | ||
2250 | /* Roaming phase is over: tables are in sync again. I can | |
9cfc7bd6 SE |
2251 | * unset the flag |
2252 | */ | |
a943cac1 ML |
2253 | orig_node->tt_poss_change = false; |
2254 | } else { | |
2255 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2256 | * in sync anymore -> request fresh tt data |
2257 | */ | |
17071578 AQ |
2258 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2259 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2260 | request_table: |
1eda58bf SE |
2261 | batadv_dbg(DBG_TT, bat_priv, |
2262 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %u last_crc: %u num_changes: %u)\n", | |
2263 | orig_node->orig, ttvn, orig_ttvn, tt_crc, | |
2264 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2265 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2266 | tt_crc, full_table); | |
a943cac1 ML |
2267 | return; |
2268 | } | |
2269 | } | |
2270 | } | |
3275e7cc AQ |
2271 | |
2272 | /* returns true whether we know that the client has moved from its old | |
2273 | * originator to another one. This entry is kept is still kept for consistency | |
2274 | * purposes | |
2275 | */ | |
08c36d3e SE |
2276 | bool batadv_tt_global_client_is_roaming(struct bat_priv *bat_priv, |
2277 | uint8_t *addr) | |
3275e7cc AQ |
2278 | { |
2279 | struct tt_global_entry *tt_global_entry; | |
2280 | bool ret = false; | |
2281 | ||
a513088d | 2282 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2283 | if (!tt_global_entry) |
2284 | goto out; | |
2285 | ||
2286 | ret = tt_global_entry->common.flags & TT_CLIENT_ROAM; | |
a513088d | 2287 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2288 | out: |
2289 | return ret; | |
2290 | } |