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 | ||
dec05074 AQ |
32 | /* hash class keys */ |
33 | static struct lock_class_key batadv_tt_local_hash_lock_class_key; | |
34 | static struct lock_class_key batadv_tt_global_hash_lock_class_key; | |
35 | ||
56303d34 SE |
36 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
37 | struct batadv_orig_node *orig_node); | |
a513088d SE |
38 | static void batadv_tt_purge(struct work_struct *work); |
39 | static void | |
56303d34 | 40 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
30cfd02b AQ |
41 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
42 | struct batadv_orig_node *orig_node, | |
43 | const unsigned char *addr, | |
44 | const char *message, bool roaming); | |
c6c8fea2 | 45 | |
7aadf889 | 46 | /* returns 1 if they are the same mac addr */ |
a513088d | 47 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 48 | { |
56303d34 | 49 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 50 | hash_entry); |
7aadf889 ML |
51 | |
52 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
53 | } | |
54 | ||
56303d34 | 55 | static struct batadv_tt_common_entry * |
5bf74e9c | 56 | batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) |
7aadf889 | 57 | { |
7aadf889 ML |
58 | struct hlist_head *head; |
59 | struct hlist_node *node; | |
56303d34 SE |
60 | struct batadv_tt_common_entry *tt_common_entry; |
61 | struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; | |
c90681b8 | 62 | uint32_t index; |
7aadf889 ML |
63 | |
64 | if (!hash) | |
65 | return NULL; | |
66 | ||
da641193 | 67 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
68 | head = &hash->table[index]; |
69 | ||
70 | rcu_read_lock(); | |
48100bac | 71 | hlist_for_each_entry_rcu(tt_common_entry, node, head, hash_entry) { |
1eda58bf | 72 | if (!batadv_compare_eth(tt_common_entry, data)) |
7aadf889 ML |
73 | continue; |
74 | ||
48100bac | 75 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
7683fdc1 AQ |
76 | continue; |
77 | ||
48100bac | 78 | tt_common_entry_tmp = tt_common_entry; |
7aadf889 ML |
79 | break; |
80 | } | |
81 | rcu_read_unlock(); | |
82 | ||
48100bac | 83 | return tt_common_entry_tmp; |
7aadf889 ML |
84 | } |
85 | ||
56303d34 SE |
86 | static struct batadv_tt_local_entry * |
87 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 88 | { |
56303d34 SE |
89 | struct batadv_tt_common_entry *tt_common_entry; |
90 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 91 | |
807736f6 | 92 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); |
48100bac AQ |
93 | if (tt_common_entry) |
94 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
95 | struct batadv_tt_local_entry, |
96 | common); | |
48100bac AQ |
97 | return tt_local_entry; |
98 | } | |
7aadf889 | 99 | |
56303d34 SE |
100 | static struct batadv_tt_global_entry * |
101 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) | |
48100bac | 102 | { |
56303d34 SE |
103 | struct batadv_tt_common_entry *tt_common_entry; |
104 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 105 | |
807736f6 | 106 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); |
48100bac AQ |
107 | if (tt_common_entry) |
108 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
109 | struct batadv_tt_global_entry, |
110 | common); | |
48100bac | 111 | return tt_global_entry; |
7aadf889 ML |
112 | } |
113 | ||
a513088d | 114 | static void |
56303d34 | 115 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 116 | { |
48100bac AQ |
117 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
118 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
119 | } |
120 | ||
a513088d | 121 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) |
531027fc | 122 | { |
56303d34 SE |
123 | struct batadv_tt_common_entry *tt_common_entry; |
124 | struct batadv_tt_global_entry *tt_global_entry; | |
531027fc | 125 | |
56303d34 SE |
126 | tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu); |
127 | tt_global_entry = container_of(tt_common_entry, | |
128 | struct batadv_tt_global_entry, common); | |
531027fc | 129 | |
531027fc SW |
130 | kfree(tt_global_entry); |
131 | } | |
132 | ||
a513088d | 133 | static void |
56303d34 | 134 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 135 | { |
db08e6e5 | 136 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 137 | batadv_tt_global_del_orig_list(tt_global_entry); |
48100bac | 138 | call_rcu(&tt_global_entry->common.rcu, |
a513088d | 139 | batadv_tt_global_entry_free_rcu); |
db08e6e5 SW |
140 | } |
141 | } | |
142 | ||
a513088d | 143 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 144 | { |
56303d34 | 145 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 146 | |
56303d34 | 147 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
7d211efc | 148 | batadv_orig_node_free_ref(orig_entry->orig_node); |
db08e6e5 SW |
149 | kfree(orig_entry); |
150 | } | |
151 | ||
a513088d | 152 | static void |
56303d34 | 153 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 154 | { |
d657e621 AQ |
155 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
156 | return; | |
29cb99de AQ |
157 | /* to avoid race conditions, immediately decrease the tt counter */ |
158 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 159 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
160 | } |
161 | ||
56303d34 | 162 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
a513088d | 163 | const uint8_t *addr, uint8_t flags) |
a73105b8 | 164 | { |
56303d34 | 165 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3b643de5 AQ |
166 | bool event_removed = false; |
167 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
168 | |
169 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
170 | ||
171 | if (!tt_change_node) | |
172 | return; | |
173 | ||
ff66c975 | 174 | tt_change_node->change.flags = flags; |
a73105b8 AQ |
175 | memcpy(tt_change_node->change.addr, addr, ETH_ALEN); |
176 | ||
acd34afa | 177 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
178 | |
179 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
180 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
181 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 AQ |
182 | list) { |
183 | if (!batadv_compare_eth(entry->change.addr, addr)) | |
184 | continue; | |
185 | ||
186 | /* DEL+ADD in the same orig interval have no effect and can be | |
187 | * removed to avoid silly behaviour on the receiver side. The | |
188 | * other way around (ADD+DEL) can happen in case of roaming of | |
189 | * a client still in the NEW state. Roaming of NEW clients is | |
190 | * now possible due to automatically recognition of "temporary" | |
191 | * clients | |
192 | */ | |
acd34afa | 193 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
194 | if (!del_op_requested && del_op_entry) |
195 | goto del; | |
196 | if (del_op_requested && !del_op_entry) | |
197 | goto del; | |
198 | continue; | |
199 | del: | |
200 | list_del(&entry->list); | |
201 | kfree(entry); | |
155e4e12 | 202 | kfree(tt_change_node); |
3b643de5 AQ |
203 | event_removed = true; |
204 | goto unlock; | |
205 | } | |
206 | ||
a73105b8 | 207 | /* track the change in the OGMinterval list */ |
807736f6 | 208 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
209 | |
210 | unlock: | |
807736f6 | 211 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 212 | |
3b643de5 | 213 | if (event_removed) |
807736f6 | 214 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 215 | else |
807736f6 | 216 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
217 | } |
218 | ||
08c36d3e | 219 | int batadv_tt_len(int changes_num) |
a73105b8 | 220 | { |
96412690 | 221 | return changes_num * sizeof(struct batadv_tt_change); |
a73105b8 AQ |
222 | } |
223 | ||
56303d34 | 224 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 225 | { |
807736f6 | 226 | if (bat_priv->tt.local_hash) |
5346c35e | 227 | return 0; |
c6c8fea2 | 228 | |
807736f6 | 229 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 230 | |
807736f6 | 231 | if (!bat_priv->tt.local_hash) |
5346c35e | 232 | return -ENOMEM; |
c6c8fea2 | 233 | |
dec05074 AQ |
234 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
235 | &batadv_tt_local_hash_lock_class_key); | |
236 | ||
5346c35e | 237 | return 0; |
c6c8fea2 SE |
238 | } |
239 | ||
068ee6e2 AQ |
240 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
241 | struct batadv_tt_global_entry *tt_global, | |
242 | const char *message) | |
243 | { | |
244 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
245 | "Deleting global tt entry %pM: %s\n", | |
246 | tt_global->common.addr, message); | |
247 | ||
248 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
249 | batadv_choose_orig, tt_global->common.addr); | |
250 | batadv_tt_global_entry_free_ref(tt_global); | |
068ee6e2 AQ |
251 | } |
252 | ||
08c36d3e SE |
253 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
254 | int ifindex) | |
c6c8fea2 | 255 | { |
56303d34 | 256 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
257 | struct batadv_tt_local_entry *tt_local; |
258 | struct batadv_tt_global_entry *tt_global; | |
db08e6e5 SW |
259 | struct hlist_head *head; |
260 | struct hlist_node *node; | |
56303d34 | 261 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 262 | int hash_added; |
068ee6e2 | 263 | bool roamed_back = false; |
c6c8fea2 | 264 | |
47c94655 | 265 | tt_local = batadv_tt_local_hash_find(bat_priv, addr); |
068ee6e2 | 266 | tt_global = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 267 | |
47c94655 AQ |
268 | if (tt_local) { |
269 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
270 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
271 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
272 | "Re-adding pending client %pM\n", addr); | |
273 | /* whatever the reason why the PENDING flag was set, | |
274 | * this is a client which was enqueued to be removed in | |
275 | * this orig_interval. Since it popped up again, the | |
276 | * flag can be reset like it was never enqueued | |
277 | */ | |
278 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
279 | goto add_event; | |
280 | } | |
281 | ||
282 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
283 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
284 | "Roaming client %pM came back to its original location\n", | |
285 | addr); | |
286 | /* the ROAM flag is set because this client roamed away | |
287 | * and the node got a roaming_advertisement message. Now | |
288 | * that the client popped up again at its original | |
289 | * location such flag can be unset | |
290 | */ | |
291 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
292 | roamed_back = true; | |
293 | } | |
294 | goto check_roaming; | |
c6c8fea2 SE |
295 | } |
296 | ||
47c94655 AQ |
297 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
298 | if (!tt_local) | |
7683fdc1 | 299 | goto out; |
a73105b8 | 300 | |
39c75a51 | 301 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 302 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
807736f6 | 303 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 304 | |
47c94655 | 305 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
306 | /* The local entry has to be marked as NEW to avoid to send it in |
307 | * a full table response going out before the next ttvn increment | |
308 | * (consistency check) | |
309 | */ | |
310 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
9563877e | 311 | if (batadv_is_wifi_iface(ifindex)) |
47c94655 AQ |
312 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
313 | atomic_set(&tt_local->common.refcount, 2); | |
314 | tt_local->last_seen = jiffies; | |
315 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
316 | |
317 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 318 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 319 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 320 | |
807736f6 | 321 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
47c94655 AQ |
322 | batadv_choose_orig, &tt_local->common, |
323 | &tt_local->common.hash_entry); | |
80b3f58c SW |
324 | |
325 | if (unlikely(hash_added != 0)) { | |
326 | /* remove the reference for the hash */ | |
47c94655 | 327 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
328 | goto out; |
329 | } | |
330 | ||
068ee6e2 | 331 | add_event: |
47c94655 | 332 | batadv_tt_local_event(bat_priv, addr, tt_local->common.flags); |
ff66c975 | 333 | |
068ee6e2 AQ |
334 | check_roaming: |
335 | /* Check whether it is a roaming, but don't do anything if the roaming | |
336 | * process has already been handled | |
337 | */ | |
338 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 339 | /* These node are probably going to update their tt table */ |
47c94655 | 340 | head = &tt_global->orig_list; |
db08e6e5 SW |
341 | rcu_read_lock(); |
342 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
47c94655 | 343 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
a513088d | 344 | orig_entry->orig_node); |
db08e6e5 SW |
345 | } |
346 | rcu_read_unlock(); | |
068ee6e2 AQ |
347 | if (roamed_back) { |
348 | batadv_tt_global_free(bat_priv, tt_global, | |
349 | "Roaming canceled"); | |
350 | tt_global = NULL; | |
351 | } else { | |
352 | /* The global entry has to be marked as ROAMING and | |
353 | * has to be kept for consistency purpose | |
354 | */ | |
355 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
356 | tt_global->roam_at = jiffies; | |
357 | } | |
7683fdc1 | 358 | } |
068ee6e2 | 359 | |
7683fdc1 | 360 | out: |
47c94655 AQ |
361 | if (tt_local) |
362 | batadv_tt_local_entry_free_ref(tt_local); | |
363 | if (tt_global) | |
364 | batadv_tt_global_entry_free_ref(tt_global); | |
c6c8fea2 SE |
365 | } |
366 | ||
a513088d SE |
367 | static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, |
368 | int *packet_buff_len, | |
369 | int min_packet_len, | |
370 | int new_packet_len) | |
be9aa4c1 ML |
371 | { |
372 | unsigned char *new_buff; | |
373 | ||
374 | new_buff = kmalloc(new_packet_len, GFP_ATOMIC); | |
375 | ||
376 | /* keep old buffer if kmalloc should fail */ | |
377 | if (new_buff) { | |
378 | memcpy(new_buff, *packet_buff, min_packet_len); | |
379 | kfree(*packet_buff); | |
380 | *packet_buff = new_buff; | |
381 | *packet_buff_len = new_packet_len; | |
382 | } | |
383 | } | |
384 | ||
56303d34 | 385 | static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv, |
a513088d SE |
386 | unsigned char **packet_buff, |
387 | int *packet_buff_len, | |
388 | int min_packet_len) | |
be9aa4c1 | 389 | { |
56303d34 | 390 | struct batadv_hard_iface *primary_if; |
be9aa4c1 ML |
391 | int req_len; |
392 | ||
e5d89254 | 393 | primary_if = batadv_primary_if_get_selected(bat_priv); |
be9aa4c1 ML |
394 | |
395 | req_len = min_packet_len; | |
807736f6 | 396 | req_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
be9aa4c1 ML |
397 | |
398 | /* if we have too many changes for one packet don't send any | |
399 | * and wait for the tt table request which will be fragmented | |
400 | */ | |
401 | if ((!primary_if) || (req_len > primary_if->soft_iface->mtu)) | |
402 | req_len = min_packet_len; | |
403 | ||
a513088d SE |
404 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
405 | min_packet_len, req_len); | |
be9aa4c1 ML |
406 | |
407 | if (primary_if) | |
e5d89254 | 408 | batadv_hardif_free_ref(primary_if); |
be9aa4c1 ML |
409 | } |
410 | ||
56303d34 | 411 | static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv, |
a513088d SE |
412 | unsigned char **packet_buff, |
413 | int *packet_buff_len, | |
414 | int min_packet_len) | |
c6c8fea2 | 415 | { |
56303d34 | 416 | struct batadv_tt_change_node *entry, *safe; |
be9aa4c1 ML |
417 | int count = 0, tot_changes = 0, new_len; |
418 | unsigned char *tt_buff; | |
419 | ||
a513088d SE |
420 | batadv_tt_prepare_packet_buff(bat_priv, packet_buff, |
421 | packet_buff_len, min_packet_len); | |
c6c8fea2 | 422 | |
be9aa4c1 ML |
423 | new_len = *packet_buff_len - min_packet_len; |
424 | tt_buff = *packet_buff + min_packet_len; | |
425 | ||
426 | if (new_len > 0) | |
08c36d3e | 427 | tot_changes = new_len / batadv_tt_len(1); |
c6c8fea2 | 428 | |
807736f6 SE |
429 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
430 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 431 | |
807736f6 | 432 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 433 | list) { |
a73105b8 | 434 | if (count < tot_changes) { |
08c36d3e | 435 | memcpy(tt_buff + batadv_tt_len(count), |
96412690 | 436 | &entry->change, sizeof(struct batadv_tt_change)); |
c6c8fea2 SE |
437 | count++; |
438 | } | |
a73105b8 AQ |
439 | list_del(&entry->list); |
440 | kfree(entry); | |
c6c8fea2 | 441 | } |
807736f6 | 442 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
443 | |
444 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
445 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
446 | kfree(bat_priv->tt.last_changeset); | |
447 | bat_priv->tt.last_changeset_len = 0; | |
448 | bat_priv->tt.last_changeset = NULL; | |
be9aa4c1 ML |
449 | /* check whether this new OGM has no changes due to size problems */ |
450 | if (new_len > 0) { | |
451 | /* if kmalloc() fails we will reply with the full table | |
a73105b8 AQ |
452 | * instead of providing the diff |
453 | */ | |
807736f6 SE |
454 | bat_priv->tt.last_changeset = kmalloc(new_len, GFP_ATOMIC); |
455 | if (bat_priv->tt.last_changeset) { | |
456 | memcpy(bat_priv->tt.last_changeset, tt_buff, new_len); | |
457 | bat_priv->tt.last_changeset_len = new_len; | |
a73105b8 AQ |
458 | } |
459 | } | |
807736f6 | 460 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 461 | |
08ad76ec | 462 | return count; |
c6c8fea2 SE |
463 | } |
464 | ||
08c36d3e | 465 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
466 | { |
467 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 468 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 469 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 470 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 471 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 472 | struct batadv_hard_iface *primary_if; |
7aadf889 | 473 | struct hlist_node *node; |
c6c8fea2 | 474 | struct hlist_head *head; |
c90681b8 | 475 | uint32_t i; |
85766a82 AQ |
476 | int last_seen_secs; |
477 | int last_seen_msecs; | |
478 | unsigned long last_seen_jiffies; | |
479 | bool no_purge; | |
480 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 481 | |
30da63a6 ML |
482 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
483 | if (!primary_if) | |
32ae9b22 | 484 | goto out; |
c6c8fea2 | 485 | |
86ceb360 | 486 | seq_printf(seq, |
f9d8a537 AQ |
487 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.4x):\n", |
488 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), | |
489 | bat_priv->tt.local_crc); | |
85766a82 AQ |
490 | seq_printf(seq, " %-13s %-7s %-10s\n", "Client", "Flags", |
491 | "Last seen"); | |
c6c8fea2 | 492 | |
c6c8fea2 SE |
493 | for (i = 0; i < hash->size; i++) { |
494 | head = &hash->table[i]; | |
495 | ||
7aadf889 | 496 | rcu_read_lock(); |
48100bac | 497 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 498 | head, hash_entry) { |
85766a82 AQ |
499 | tt_local = container_of(tt_common_entry, |
500 | struct batadv_tt_local_entry, | |
501 | common); | |
502 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
503 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
504 | last_seen_secs = last_seen_msecs / 1000; | |
505 | last_seen_msecs = last_seen_msecs % 1000; | |
506 | ||
507 | no_purge = tt_common_entry->flags & np_flag; | |
508 | ||
509 | seq_printf(seq, " * %pM [%c%c%c%c%c] %3u.%03u\n", | |
7c64fd98 SE |
510 | tt_common_entry->addr, |
511 | (tt_common_entry->flags & | |
acd34afa | 512 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 513 | no_purge ? 'P' : '.', |
7c64fd98 | 514 | (tt_common_entry->flags & |
acd34afa | 515 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 516 | (tt_common_entry->flags & |
acd34afa | 517 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 518 | (tt_common_entry->flags & |
85766a82 AQ |
519 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
520 | no_purge ? last_seen_secs : 0, | |
521 | no_purge ? last_seen_msecs : 0); | |
c6c8fea2 | 522 | } |
7aadf889 | 523 | rcu_read_unlock(); |
c6c8fea2 | 524 | } |
32ae9b22 ML |
525 | out: |
526 | if (primary_if) | |
e5d89254 | 527 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 528 | return 0; |
c6c8fea2 SE |
529 | } |
530 | ||
56303d34 SE |
531 | static void |
532 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
533 | struct batadv_tt_local_entry *tt_local_entry, | |
534 | uint16_t flags, const char *message) | |
c6c8fea2 | 535 | { |
a513088d SE |
536 | batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, |
537 | tt_local_entry->common.flags | flags); | |
a73105b8 | 538 | |
015758d0 AQ |
539 | /* The local client has to be marked as "pending to be removed" but has |
540 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
541 | * response issued before the net ttvn increment (consistency check) |
542 | */ | |
acd34afa | 543 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 544 | |
39c75a51 | 545 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
546 | "Local tt entry (%pM) pending to be removed: %s\n", |
547 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
548 | } |
549 | ||
7f91d06c AQ |
550 | /** |
551 | * batadv_tt_local_remove - logically remove an entry from the local table | |
552 | * @bat_priv: the bat priv with all the soft interface information | |
553 | * @addr: the MAC address of the client to remove | |
554 | * @message: message to append to the log on deletion | |
555 | * @roaming: true if the deletion is due to a roaming event | |
556 | * | |
557 | * Returns the flags assigned to the local entry before being deleted | |
558 | */ | |
559 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
560 | const uint8_t *addr, const char *message, | |
561 | bool roaming) | |
c6c8fea2 | 562 | { |
170173bf | 563 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 564 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 565 | |
a513088d | 566 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
567 | if (!tt_local_entry) |
568 | goto out; | |
569 | ||
7f91d06c AQ |
570 | curr_flags = tt_local_entry->common.flags; |
571 | ||
acd34afa | 572 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
573 | /* if this global entry addition is due to a roaming, the node has to |
574 | * mark the local entry as "roamed" in order to correctly reroute | |
575 | * packets later | |
576 | */ | |
7c1fd91d | 577 | if (roaming) { |
acd34afa | 578 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
579 | /* mark the local client as ROAMed */ |
580 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
581 | } | |
42d0b044 | 582 | |
068ee6e2 AQ |
583 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
584 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
585 | message); | |
586 | goto out; | |
587 | } | |
588 | /* if this client has been added right now, it is possible to | |
589 | * immediately purge it | |
590 | */ | |
591 | batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, | |
592 | curr_flags | BATADV_TT_CLIENT_DEL); | |
593 | hlist_del_rcu(&tt_local_entry->common.hash_entry); | |
594 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 595 | |
7683fdc1 AQ |
596 | out: |
597 | if (tt_local_entry) | |
a513088d | 598 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
599 | |
600 | return curr_flags; | |
c6c8fea2 SE |
601 | } |
602 | ||
56303d34 | 603 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 604 | struct hlist_head *head) |
c6c8fea2 | 605 | { |
56303d34 SE |
606 | struct batadv_tt_local_entry *tt_local_entry; |
607 | struct batadv_tt_common_entry *tt_common_entry; | |
7aadf889 | 608 | struct hlist_node *node, *node_tmp; |
acd34afa SE |
609 | |
610 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, | |
611 | hash_entry) { | |
612 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
613 | struct batadv_tt_local_entry, |
614 | common); | |
acd34afa SE |
615 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
616 | continue; | |
617 | ||
618 | /* entry already marked for deletion */ | |
619 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
620 | continue; | |
621 | ||
622 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
623 | BATADV_TT_LOCAL_TIMEOUT)) | |
624 | continue; | |
625 | ||
626 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
627 | BATADV_TT_CLIENT_DEL, "timed out"); | |
628 | } | |
629 | } | |
630 | ||
56303d34 | 631 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 632 | { |
807736f6 | 633 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 634 | struct hlist_head *head; |
7683fdc1 | 635 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 636 | uint32_t i; |
c6c8fea2 | 637 | |
c6c8fea2 SE |
638 | for (i = 0; i < hash->size; i++) { |
639 | head = &hash->table[i]; | |
7683fdc1 | 640 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 641 | |
7683fdc1 | 642 | spin_lock_bh(list_lock); |
acd34afa | 643 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 644 | spin_unlock_bh(list_lock); |
c6c8fea2 | 645 | } |
c6c8fea2 SE |
646 | } |
647 | ||
56303d34 | 648 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 649 | { |
5bf74e9c | 650 | struct batadv_hashtable *hash; |
a73105b8 | 651 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
652 | struct batadv_tt_common_entry *tt_common_entry; |
653 | struct batadv_tt_local_entry *tt_local; | |
7683fdc1 AQ |
654 | struct hlist_node *node, *node_tmp; |
655 | struct hlist_head *head; | |
c90681b8 | 656 | uint32_t i; |
a73105b8 | 657 | |
807736f6 | 658 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
659 | return; |
660 | ||
807736f6 | 661 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
662 | |
663 | for (i = 0; i < hash->size; i++) { | |
664 | head = &hash->table[i]; | |
665 | list_lock = &hash->list_locks[i]; | |
666 | ||
667 | spin_lock_bh(list_lock); | |
48100bac | 668 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
a73105b8 AQ |
669 | head, hash_entry) { |
670 | hlist_del_rcu(node); | |
56303d34 SE |
671 | tt_local = container_of(tt_common_entry, |
672 | struct batadv_tt_local_entry, | |
673 | common); | |
674 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
675 | } |
676 | spin_unlock_bh(list_lock); | |
677 | } | |
678 | ||
1a8eaf07 | 679 | batadv_hash_destroy(hash); |
a73105b8 | 680 | |
807736f6 | 681 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
682 | } |
683 | ||
56303d34 | 684 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 685 | { |
807736f6 | 686 | if (bat_priv->tt.global_hash) |
5346c35e | 687 | return 0; |
c6c8fea2 | 688 | |
807736f6 | 689 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 690 | |
807736f6 | 691 | if (!bat_priv->tt.global_hash) |
5346c35e | 692 | return -ENOMEM; |
c6c8fea2 | 693 | |
dec05074 AQ |
694 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
695 | &batadv_tt_global_hash_lock_class_key); | |
696 | ||
5346c35e | 697 | return 0; |
c6c8fea2 SE |
698 | } |
699 | ||
56303d34 | 700 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 701 | { |
56303d34 | 702 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 703 | |
807736f6 | 704 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 705 | |
807736f6 | 706 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
707 | list) { |
708 | list_del(&entry->list); | |
709 | kfree(entry); | |
710 | } | |
c6c8fea2 | 711 | |
807736f6 SE |
712 | atomic_set(&bat_priv->tt.local_changes, 0); |
713 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 714 | } |
c6c8fea2 | 715 | |
d657e621 AQ |
716 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
717 | * batadv_tt_global_entry list | |
718 | * | |
719 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 720 | */ |
d657e621 AQ |
721 | static struct batadv_tt_orig_list_entry * |
722 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
723 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 724 | { |
d657e621 | 725 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 SW |
726 | const struct hlist_head *head; |
727 | struct hlist_node *node; | |
db08e6e5 SW |
728 | |
729 | rcu_read_lock(); | |
730 | head = &entry->orig_list; | |
731 | hlist_for_each_entry_rcu(tmp_orig_entry, node, head, list) { | |
d657e621 AQ |
732 | if (tmp_orig_entry->orig_node != orig_node) |
733 | continue; | |
734 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
735 | continue; | |
736 | ||
737 | orig_entry = tmp_orig_entry; | |
738 | break; | |
db08e6e5 SW |
739 | } |
740 | rcu_read_unlock(); | |
d657e621 AQ |
741 | |
742 | return orig_entry; | |
743 | } | |
744 | ||
745 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
746 | * returns true if found, false otherwise | |
747 | */ | |
748 | static bool | |
749 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
750 | const struct batadv_orig_node *orig_node) | |
751 | { | |
752 | struct batadv_tt_orig_list_entry *orig_entry; | |
753 | bool found = false; | |
754 | ||
755 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
756 | if (orig_entry) { | |
757 | found = true; | |
758 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
759 | } | |
760 | ||
db08e6e5 SW |
761 | return found; |
762 | } | |
763 | ||
a513088d | 764 | static void |
d657e621 | 765 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 766 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 767 | { |
56303d34 | 768 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 769 | |
d657e621 | 770 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
771 | if (orig_entry) { |
772 | /* refresh the ttvn: the current value could be a bogus one that | |
773 | * was added during a "temporary client detection" | |
774 | */ | |
775 | orig_entry->ttvn = ttvn; | |
d657e621 | 776 | goto out; |
30cfd02b | 777 | } |
d657e621 | 778 | |
db08e6e5 SW |
779 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
780 | if (!orig_entry) | |
d657e621 | 781 | goto out; |
db08e6e5 SW |
782 | |
783 | INIT_HLIST_NODE(&orig_entry->list); | |
784 | atomic_inc(&orig_node->refcount); | |
785 | atomic_inc(&orig_node->tt_size); | |
786 | orig_entry->orig_node = orig_node; | |
787 | orig_entry->ttvn = ttvn; | |
d657e621 | 788 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 789 | |
d657e621 | 790 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 791 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
792 | &tt_global->orig_list); |
793 | spin_unlock_bh(&tt_global->list_lock); | |
794 | out: | |
795 | if (orig_entry) | |
796 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
797 | } |
798 | ||
a73105b8 | 799 | /* caller must hold orig_node refcount */ |
56303d34 SE |
800 | int batadv_tt_global_add(struct batadv_priv *bat_priv, |
801 | struct batadv_orig_node *orig_node, | |
d4f44692 AQ |
802 | const unsigned char *tt_addr, uint8_t flags, |
803 | uint8_t ttvn) | |
a73105b8 | 804 | { |
170173bf SE |
805 | struct batadv_tt_global_entry *tt_global_entry; |
806 | struct batadv_tt_local_entry *tt_local_entry; | |
7683fdc1 | 807 | int ret = 0; |
80b3f58c | 808 | int hash_added; |
56303d34 | 809 | struct batadv_tt_common_entry *common; |
7f91d06c | 810 | uint16_t local_flags; |
c6c8fea2 | 811 | |
a513088d | 812 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
068ee6e2 AQ |
813 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr); |
814 | ||
815 | /* if the node already has a local client for this entry, it has to wait | |
816 | * for a roaming advertisement instead of manually messing up the global | |
817 | * table | |
818 | */ | |
819 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
820 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
821 | goto out; | |
a73105b8 AQ |
822 | |
823 | if (!tt_global_entry) { | |
d4f44692 | 824 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 825 | if (!tt_global_entry) |
7683fdc1 AQ |
826 | goto out; |
827 | ||
c0a55929 SE |
828 | common = &tt_global_entry->common; |
829 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 830 | |
d4f44692 | 831 | common->flags = flags; |
cc47f66e | 832 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
833 | /* node must store current time in case of roaming. This is |
834 | * needed to purge this entry out on timeout (if nobody claims | |
835 | * it) | |
836 | */ | |
837 | if (flags & BATADV_TT_CLIENT_ROAM) | |
838 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 839 | atomic_set(&common->refcount, 2); |
30cfd02b | 840 | common->added_at = jiffies; |
db08e6e5 SW |
841 | |
842 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
843 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 844 | |
807736f6 | 845 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d SE |
846 | batadv_compare_tt, |
847 | batadv_choose_orig, common, | |
848 | &common->hash_entry); | |
80b3f58c SW |
849 | |
850 | if (unlikely(hash_added != 0)) { | |
851 | /* remove the reference for the hash */ | |
a513088d | 852 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
853 | goto out_remove; |
854 | } | |
a73105b8 | 855 | } else { |
068ee6e2 | 856 | common = &tt_global_entry->common; |
30cfd02b AQ |
857 | /* If there is already a global entry, we can use this one for |
858 | * our processing. | |
068ee6e2 AQ |
859 | * But if we are trying to add a temporary client then here are |
860 | * two options at this point: | |
861 | * 1) the global client is not a temporary client: the global | |
862 | * client has to be left as it is, temporary information | |
863 | * should never override any already known client state | |
864 | * 2) the global client is a temporary client: purge the | |
865 | * originator list and add the new one orig_entry | |
30cfd02b | 866 | */ |
068ee6e2 AQ |
867 | if (flags & BATADV_TT_CLIENT_TEMP) { |
868 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
869 | goto out; | |
870 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
871 | orig_node)) | |
872 | goto out_remove; | |
873 | batadv_tt_global_del_orig_list(tt_global_entry); | |
874 | goto add_orig_entry; | |
875 | } | |
30cfd02b AQ |
876 | |
877 | /* if the client was temporary added before receiving the first | |
878 | * OGM announcing it, we have to clear the TEMP flag | |
879 | */ | |
068ee6e2 | 880 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 881 | |
e9c00136 AQ |
882 | /* the change can carry possible "attribute" flags like the |
883 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
884 | * client entry | |
885 | */ | |
886 | tt_global_entry->common.flags |= flags; | |
887 | ||
acd34afa SE |
888 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
889 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
890 | * delete + roaming change for this originator. |
891 | * | |
892 | * We should first delete the old originator before adding the | |
893 | * new one. | |
894 | */ | |
068ee6e2 | 895 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 896 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 897 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 898 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
899 | } |
900 | } | |
068ee6e2 | 901 | add_orig_entry: |
30cfd02b | 902 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 903 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 904 | |
39c75a51 | 905 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 906 | "Creating new global tt entry: %pM (via %pM)\n", |
068ee6e2 | 907 | common->addr, orig_node->orig); |
c10dba05 | 908 | ret = 1; |
c6c8fea2 | 909 | |
80b3f58c | 910 | out_remove: |
7f91d06c | 911 | |
a73105b8 | 912 | /* remove address from local hash if present */ |
7f91d06c AQ |
913 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, |
914 | "global tt received", | |
068ee6e2 | 915 | !!(flags & BATADV_TT_CLIENT_ROAM)); |
7f91d06c AQ |
916 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
917 | ||
068ee6e2 AQ |
918 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
919 | /* this is a normal global add. Therefore the client is not in a | |
920 | * roaming state anymore. | |
921 | */ | |
922 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
923 | ||
7683fdc1 AQ |
924 | out: |
925 | if (tt_global_entry) | |
a513088d | 926 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
927 | if (tt_local_entry) |
928 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 929 | return ret; |
c6c8fea2 SE |
930 | } |
931 | ||
981d8900 SE |
932 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
933 | * @tt_global_entry: global translation table entry to be analyzed | |
934 | * | |
935 | * This functon assumes the caller holds rcu_read_lock(). | |
936 | * Returns best originator list entry or NULL on errors. | |
937 | */ | |
938 | static struct batadv_tt_orig_list_entry * | |
939 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) | |
940 | { | |
941 | struct batadv_neigh_node *router = NULL; | |
942 | struct hlist_head *head; | |
943 | struct hlist_node *node; | |
944 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; | |
945 | int best_tq = 0; | |
946 | ||
947 | head = &tt_global_entry->orig_list; | |
948 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
949 | router = batadv_orig_node_get_router(orig_entry->orig_node); | |
950 | if (!router) | |
951 | continue; | |
952 | ||
953 | if (router->tq_avg > best_tq) { | |
954 | best_entry = orig_entry; | |
955 | best_tq = router->tq_avg; | |
956 | } | |
957 | ||
958 | batadv_neigh_node_free_ref(router); | |
959 | } | |
960 | ||
961 | return best_entry; | |
962 | } | |
963 | ||
964 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
965 | * for this global entry | |
966 | * @tt_global_entry: global translation table entry to be printed | |
967 | * @seq: debugfs table seq_file struct | |
968 | * | |
969 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 970 | */ |
a513088d | 971 | static void |
56303d34 | 972 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 973 | struct seq_file *seq) |
db08e6e5 SW |
974 | { |
975 | struct hlist_head *head; | |
976 | struct hlist_node *node; | |
981d8900 | 977 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 978 | struct batadv_tt_common_entry *tt_common_entry; |
db08e6e5 SW |
979 | uint16_t flags; |
980 | uint8_t last_ttvn; | |
981 | ||
982 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
983 | flags = tt_common_entry->flags; |
984 | ||
985 | best_entry = batadv_transtable_best_orig(tt_global_entry); | |
986 | if (best_entry) { | |
987 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); | |
f9d8a537 AQ |
988 | seq_printf(seq, |
989 | " %c %pM (%3u) via %pM (%3u) (%#.4x) [%c%c%c]\n", | |
981d8900 SE |
990 | '*', tt_global_entry->common.addr, |
991 | best_entry->ttvn, best_entry->orig_node->orig, | |
f9d8a537 | 992 | last_ttvn, best_entry->orig_node->tt_crc, |
981d8900 SE |
993 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
994 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
995 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
996 | } | |
db08e6e5 SW |
997 | |
998 | head = &tt_global_entry->orig_list; | |
999 | ||
1000 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
981d8900 SE |
1001 | if (best_entry == orig_entry) |
1002 | continue; | |
1003 | ||
db08e6e5 | 1004 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
981d8900 SE |
1005 | seq_printf(seq, " %c %pM (%3u) via %pM (%3u) [%c%c%c]\n", |
1006 | '+', tt_global_entry->common.addr, | |
1007 | orig_entry->ttvn, orig_entry->orig_node->orig, | |
1008 | last_ttvn, | |
acd34afa | 1009 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1010 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1011 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
db08e6e5 SW |
1012 | } |
1013 | } | |
1014 | ||
08c36d3e | 1015 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1016 | { |
1017 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1018 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1019 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1020 | struct batadv_tt_common_entry *tt_common_entry; |
1021 | struct batadv_tt_global_entry *tt_global; | |
1022 | struct batadv_hard_iface *primary_if; | |
7aadf889 | 1023 | struct hlist_node *node; |
c6c8fea2 | 1024 | struct hlist_head *head; |
c90681b8 | 1025 | uint32_t i; |
c6c8fea2 | 1026 | |
30da63a6 ML |
1027 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1028 | if (!primary_if) | |
32ae9b22 | 1029 | goto out; |
c6c8fea2 | 1030 | |
2dafb49d AQ |
1031 | seq_printf(seq, |
1032 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1033 | net_dev->name); |
f9d8a537 AQ |
1034 | seq_printf(seq, " %-13s %s %-15s %s (%-6s) %s\n", |
1035 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "CRC", | |
1036 | "Flags"); | |
c6c8fea2 | 1037 | |
c6c8fea2 SE |
1038 | for (i = 0; i < hash->size; i++) { |
1039 | head = &hash->table[i]; | |
1040 | ||
7aadf889 | 1041 | rcu_read_lock(); |
48100bac | 1042 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 1043 | head, hash_entry) { |
56303d34 SE |
1044 | tt_global = container_of(tt_common_entry, |
1045 | struct batadv_tt_global_entry, | |
1046 | common); | |
1047 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 1048 | } |
7aadf889 | 1049 | rcu_read_unlock(); |
c6c8fea2 | 1050 | } |
32ae9b22 ML |
1051 | out: |
1052 | if (primary_if) | |
e5d89254 | 1053 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1054 | return 0; |
c6c8fea2 SE |
1055 | } |
1056 | ||
db08e6e5 | 1057 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1058 | static void |
56303d34 | 1059 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1060 | { |
db08e6e5 SW |
1061 | struct hlist_head *head; |
1062 | struct hlist_node *node, *safe; | |
56303d34 | 1063 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1064 | |
db08e6e5 SW |
1065 | spin_lock_bh(&tt_global_entry->list_lock); |
1066 | head = &tt_global_entry->orig_list; | |
1067 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
1068 | hlist_del_rcu(node); | |
a513088d | 1069 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1070 | } |
1071 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1072 | } |
1073 | ||
a513088d | 1074 | static void |
56303d34 SE |
1075 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1076 | struct batadv_tt_global_entry *tt_global_entry, | |
1077 | struct batadv_orig_node *orig_node, | |
a513088d | 1078 | const char *message) |
db08e6e5 SW |
1079 | { |
1080 | struct hlist_head *head; | |
1081 | struct hlist_node *node, *safe; | |
56303d34 | 1082 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1083 | |
1084 | spin_lock_bh(&tt_global_entry->list_lock); | |
1085 | head = &tt_global_entry->orig_list; | |
1086 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
1087 | if (orig_entry->orig_node == orig_node) { | |
39c75a51 | 1088 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1089 | "Deleting %pM from global tt entry %pM: %s\n", |
1090 | orig_node->orig, | |
1091 | tt_global_entry->common.addr, message); | |
db08e6e5 | 1092 | hlist_del_rcu(node); |
a513088d | 1093 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1094 | } |
1095 | } | |
1096 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1097 | } | |
1098 | ||
db08e6e5 | 1099 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1100 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1101 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1102 | */ |
a513088d | 1103 | static void |
56303d34 SE |
1104 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1105 | struct batadv_tt_global_entry *tt_global_entry, | |
1106 | struct batadv_orig_node *orig_node, | |
1107 | const char *message) | |
db08e6e5 SW |
1108 | { |
1109 | bool last_entry = true; | |
1110 | struct hlist_head *head; | |
1111 | struct hlist_node *node; | |
56303d34 | 1112 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1113 | |
1114 | /* no local entry exists, case 1: | |
1115 | * Check if this is the last one or if other entries exist. | |
1116 | */ | |
1117 | ||
1118 | rcu_read_lock(); | |
1119 | head = &tt_global_entry->orig_list; | |
1120 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
1121 | if (orig_entry->orig_node != orig_node) { | |
1122 | last_entry = false; | |
1123 | break; | |
1124 | } | |
1125 | } | |
1126 | rcu_read_unlock(); | |
1127 | ||
1128 | if (last_entry) { | |
1129 | /* its the last one, mark for roaming. */ | |
acd34afa | 1130 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1131 | tt_global_entry->roam_at = jiffies; |
1132 | } else | |
1133 | /* there is another entry, we can simply delete this | |
1134 | * one and can still use the other one. | |
1135 | */ | |
a513088d SE |
1136 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1137 | orig_node, message); | |
db08e6e5 SW |
1138 | } |
1139 | ||
1140 | ||
1141 | ||
56303d34 SE |
1142 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1143 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1144 | const unsigned char *addr, |
1145 | const char *message, bool roaming) | |
a73105b8 | 1146 | { |
170173bf | 1147 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1148 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1149 | |
a513088d | 1150 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 1151 | if (!tt_global_entry) |
7683fdc1 | 1152 | goto out; |
a73105b8 | 1153 | |
db08e6e5 | 1154 | if (!roaming) { |
a513088d SE |
1155 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1156 | orig_node, message); | |
db08e6e5 SW |
1157 | |
1158 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1159 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1160 | message); | |
db08e6e5 SW |
1161 | |
1162 | goto out; | |
1163 | } | |
92f90f56 SE |
1164 | |
1165 | /* if we are deleting a global entry due to a roam | |
1166 | * event, there are two possibilities: | |
db08e6e5 SW |
1167 | * 1) the client roamed from node A to node B => if there |
1168 | * is only one originator left for this client, we mark | |
acd34afa | 1169 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1170 | * wait for node B to claim it. In case of timeout |
1171 | * the entry is purged. | |
db08e6e5 SW |
1172 | * |
1173 | * If there are other originators left, we directly delete | |
1174 | * the originator. | |
92f90f56 | 1175 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1176 | * the global entry, since it is useless now. |
1177 | */ | |
a513088d SE |
1178 | local_entry = batadv_tt_local_hash_find(bat_priv, |
1179 | tt_global_entry->common.addr); | |
1180 | if (local_entry) { | |
db08e6e5 | 1181 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1182 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1183 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1184 | } else |
1185 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1186 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1187 | orig_node, message); | |
92f90f56 | 1188 | |
92f90f56 | 1189 | |
cc47f66e | 1190 | out: |
7683fdc1 | 1191 | if (tt_global_entry) |
a513088d SE |
1192 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1193 | if (local_entry) | |
1194 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1195 | } |
1196 | ||
56303d34 SE |
1197 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1198 | struct batadv_orig_node *orig_node, | |
1199 | const char *message) | |
c6c8fea2 | 1200 | { |
56303d34 SE |
1201 | struct batadv_tt_global_entry *tt_global; |
1202 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1203 | uint32_t i; |
807736f6 | 1204 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
a73105b8 AQ |
1205 | struct hlist_node *node, *safe; |
1206 | struct hlist_head *head; | |
7683fdc1 | 1207 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 1208 | |
6e801494 SW |
1209 | if (!hash) |
1210 | return; | |
1211 | ||
a73105b8 AQ |
1212 | for (i = 0; i < hash->size; i++) { |
1213 | head = &hash->table[i]; | |
7683fdc1 | 1214 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1215 | |
7683fdc1 | 1216 | spin_lock_bh(list_lock); |
48100bac | 1217 | hlist_for_each_entry_safe(tt_common_entry, node, safe, |
7c64fd98 | 1218 | head, hash_entry) { |
56303d34 SE |
1219 | tt_global = container_of(tt_common_entry, |
1220 | struct batadv_tt_global_entry, | |
1221 | common); | |
db08e6e5 | 1222 | |
56303d34 | 1223 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1224 | orig_node, message); |
db08e6e5 | 1225 | |
56303d34 | 1226 | if (hlist_empty(&tt_global->orig_list)) { |
39c75a51 | 1227 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1228 | "Deleting global tt entry %pM: %s\n", |
56303d34 | 1229 | tt_global->common.addr, message); |
7683fdc1 | 1230 | hlist_del_rcu(node); |
56303d34 | 1231 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1232 | } |
a73105b8 | 1233 | } |
7683fdc1 | 1234 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1235 | } |
17071578 | 1236 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1237 | } |
1238 | ||
30cfd02b AQ |
1239 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1240 | char **msg) | |
cc47f66e | 1241 | { |
30cfd02b AQ |
1242 | bool purge = false; |
1243 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1244 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1245 | |
30cfd02b AQ |
1246 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1247 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1248 | purge = true; | |
1249 | *msg = "Roaming timeout\n"; | |
1250 | } | |
42d0b044 | 1251 | |
30cfd02b AQ |
1252 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1253 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1254 | purge = true; | |
1255 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1256 | } |
30cfd02b AQ |
1257 | |
1258 | return purge; | |
42d0b044 SE |
1259 | } |
1260 | ||
30cfd02b | 1261 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1262 | { |
807736f6 | 1263 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1264 | struct hlist_head *head; |
30cfd02b | 1265 | struct hlist_node *node, *node_tmp; |
7683fdc1 | 1266 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1267 | uint32_t i; |
30cfd02b AQ |
1268 | char *msg = NULL; |
1269 | struct batadv_tt_common_entry *tt_common; | |
1270 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1271 | |
cc47f66e AQ |
1272 | for (i = 0; i < hash->size; i++) { |
1273 | head = &hash->table[i]; | |
7683fdc1 | 1274 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1275 | |
7683fdc1 | 1276 | spin_lock_bh(list_lock); |
30cfd02b AQ |
1277 | hlist_for_each_entry_safe(tt_common, node, node_tmp, head, |
1278 | hash_entry) { | |
1279 | tt_global = container_of(tt_common, | |
1280 | struct batadv_tt_global_entry, | |
1281 | common); | |
1282 | ||
1283 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1284 | continue; | |
1285 | ||
1286 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
1287 | "Deleting global tt entry (%pM): %s\n", | |
1288 | tt_global->common.addr, msg); | |
1289 | ||
1290 | hlist_del_rcu(node); | |
1291 | ||
1292 | batadv_tt_global_entry_free_ref(tt_global); | |
1293 | } | |
7683fdc1 | 1294 | spin_unlock_bh(list_lock); |
cc47f66e | 1295 | } |
cc47f66e AQ |
1296 | } |
1297 | ||
56303d34 | 1298 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1299 | { |
5bf74e9c | 1300 | struct batadv_hashtable *hash; |
7683fdc1 | 1301 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1302 | struct batadv_tt_common_entry *tt_common_entry; |
1303 | struct batadv_tt_global_entry *tt_global; | |
7683fdc1 AQ |
1304 | struct hlist_node *node, *node_tmp; |
1305 | struct hlist_head *head; | |
c90681b8 | 1306 | uint32_t i; |
7683fdc1 | 1307 | |
807736f6 | 1308 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1309 | return; |
1310 | ||
807736f6 | 1311 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1312 | |
1313 | for (i = 0; i < hash->size; i++) { | |
1314 | head = &hash->table[i]; | |
1315 | list_lock = &hash->list_locks[i]; | |
1316 | ||
1317 | spin_lock_bh(list_lock); | |
48100bac | 1318 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
7683fdc1 AQ |
1319 | head, hash_entry) { |
1320 | hlist_del_rcu(node); | |
56303d34 SE |
1321 | tt_global = container_of(tt_common_entry, |
1322 | struct batadv_tt_global_entry, | |
1323 | common); | |
1324 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1325 | } |
1326 | spin_unlock_bh(list_lock); | |
1327 | } | |
1328 | ||
1a8eaf07 | 1329 | batadv_hash_destroy(hash); |
7683fdc1 | 1330 | |
807736f6 | 1331 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1332 | } |
1333 | ||
56303d34 SE |
1334 | static bool |
1335 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1336 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1337 | { |
1338 | bool ret = false; | |
1339 | ||
acd34afa SE |
1340 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1341 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1342 | ret = true; |
1343 | ||
1344 | return ret; | |
1345 | } | |
1346 | ||
56303d34 SE |
1347 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1348 | const uint8_t *src, | |
1349 | const uint8_t *addr) | |
c6c8fea2 | 1350 | { |
56303d34 SE |
1351 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1352 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1353 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1354 | struct batadv_tt_orig_list_entry *best_entry; |
c6c8fea2 | 1355 | |
3d393e47 | 1356 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1357 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
068ee6e2 AQ |
1358 | if (!tt_local_entry || |
1359 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1360 | goto out; |
1361 | } | |
7aadf889 | 1362 | |
a513088d | 1363 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1364 | if (!tt_global_entry) |
7b36e8ee | 1365 | goto out; |
7aadf889 | 1366 | |
3d393e47 | 1367 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1368 | * isolation |
1369 | */ | |
a513088d SE |
1370 | if (tt_local_entry && |
1371 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1372 | goto out; |
1373 | ||
db08e6e5 | 1374 | rcu_read_lock(); |
981d8900 | 1375 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
db08e6e5 | 1376 | /* found anything? */ |
981d8900 SE |
1377 | if (best_entry) |
1378 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1379 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1380 | orig_node = NULL; | |
1381 | rcu_read_unlock(); | |
981d8900 | 1382 | |
7b36e8ee | 1383 | out: |
3d393e47 | 1384 | if (tt_global_entry) |
a513088d | 1385 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1386 | if (tt_local_entry) |
a513088d | 1387 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1388 | |
7b36e8ee | 1389 | return orig_node; |
c6c8fea2 | 1390 | } |
a73105b8 AQ |
1391 | |
1392 | /* Calculates the checksum of the local table of a given orig_node */ | |
56303d34 SE |
1393 | static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, |
1394 | struct batadv_orig_node *orig_node) | |
a73105b8 AQ |
1395 | { |
1396 | uint16_t total = 0, total_one; | |
807736f6 | 1397 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1398 | struct batadv_tt_common_entry *tt_common; |
1399 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 AQ |
1400 | struct hlist_node *node; |
1401 | struct hlist_head *head; | |
c90681b8 AQ |
1402 | uint32_t i; |
1403 | int j; | |
a73105b8 AQ |
1404 | |
1405 | for (i = 0; i < hash->size; i++) { | |
1406 | head = &hash->table[i]; | |
1407 | ||
1408 | rcu_read_lock(); | |
acd34afa | 1409 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
56303d34 SE |
1410 | tt_global = container_of(tt_common, |
1411 | struct batadv_tt_global_entry, | |
1412 | common); | |
db08e6e5 SW |
1413 | /* Roaming clients are in the global table for |
1414 | * consistency only. They don't have to be | |
1415 | * taken into account while computing the | |
1416 | * global crc | |
1417 | */ | |
acd34afa | 1418 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1419 | continue; |
30cfd02b AQ |
1420 | /* Temporary clients have not been announced yet, so |
1421 | * they have to be skipped while computing the global | |
1422 | * crc | |
1423 | */ | |
1424 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1425 | continue; | |
db08e6e5 SW |
1426 | |
1427 | /* find out if this global entry is announced by this | |
1428 | * originator | |
1429 | */ | |
56303d34 | 1430 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1431 | orig_node)) |
db08e6e5 SW |
1432 | continue; |
1433 | ||
1434 | total_one = 0; | |
1435 | for (j = 0; j < ETH_ALEN; j++) | |
1436 | total_one = crc16_byte(total_one, | |
acd34afa | 1437 | tt_common->addr[j]); |
db08e6e5 | 1438 | total ^= total_one; |
a73105b8 AQ |
1439 | } |
1440 | rcu_read_unlock(); | |
1441 | } | |
1442 | ||
1443 | return total; | |
1444 | } | |
1445 | ||
1446 | /* Calculates the checksum of the local table */ | |
56303d34 | 1447 | static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv) |
a73105b8 AQ |
1448 | { |
1449 | uint16_t total = 0, total_one; | |
807736f6 | 1450 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1451 | struct batadv_tt_common_entry *tt_common; |
a73105b8 AQ |
1452 | struct hlist_node *node; |
1453 | struct hlist_head *head; | |
c90681b8 AQ |
1454 | uint32_t i; |
1455 | int j; | |
a73105b8 AQ |
1456 | |
1457 | for (i = 0; i < hash->size; i++) { | |
1458 | head = &hash->table[i]; | |
1459 | ||
1460 | rcu_read_lock(); | |
acd34afa | 1461 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
058d0e26 | 1462 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1463 | * account while computing the CRC |
1464 | */ | |
acd34afa | 1465 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1466 | continue; |
a73105b8 AQ |
1467 | total_one = 0; |
1468 | for (j = 0; j < ETH_ALEN; j++) | |
1469 | total_one = crc16_byte(total_one, | |
acd34afa | 1470 | tt_common->addr[j]); |
a73105b8 AQ |
1471 | total ^= total_one; |
1472 | } | |
a73105b8 AQ |
1473 | rcu_read_unlock(); |
1474 | } | |
1475 | ||
1476 | return total; | |
1477 | } | |
1478 | ||
56303d34 | 1479 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1480 | { |
56303d34 | 1481 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1482 | |
807736f6 | 1483 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1484 | |
807736f6 | 1485 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1486 | list_del(&node->list); |
1487 | kfree(node); | |
1488 | } | |
1489 | ||
807736f6 | 1490 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1491 | } |
1492 | ||
56303d34 SE |
1493 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1494 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1495 | const unsigned char *tt_buff, |
1496 | uint8_t tt_num_changes) | |
a73105b8 | 1497 | { |
08c36d3e | 1498 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
a73105b8 AQ |
1499 | |
1500 | /* Replace the old buffer only if I received something in the | |
9cfc7bd6 SE |
1501 | * last OGM (the OGM could carry no changes) |
1502 | */ | |
a73105b8 AQ |
1503 | spin_lock_bh(&orig_node->tt_buff_lock); |
1504 | if (tt_buff_len > 0) { | |
1505 | kfree(orig_node->tt_buff); | |
1506 | orig_node->tt_buff_len = 0; | |
1507 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1508 | if (orig_node->tt_buff) { | |
1509 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1510 | orig_node->tt_buff_len = tt_buff_len; | |
1511 | } | |
1512 | } | |
1513 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1514 | } | |
1515 | ||
56303d34 | 1516 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1517 | { |
56303d34 | 1518 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1519 | |
807736f6 SE |
1520 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1521 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1522 | if (batadv_has_timed_out(node->issued_at, |
1523 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1524 | list_del(&node->list); |
1525 | kfree(node); | |
1526 | } | |
1527 | } | |
807736f6 | 1528 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1529 | } |
1530 | ||
1531 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1532 | * has already been issued for this orig_node, NULL otherwise |
1533 | */ | |
56303d34 SE |
1534 | static struct batadv_tt_req_node * |
1535 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1536 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1537 | { |
56303d34 | 1538 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 1539 | |
807736f6 SE |
1540 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1541 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
1542 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1543 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1544 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1545 | goto unlock; |
1546 | } | |
1547 | ||
1548 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1549 | if (!tt_req_node) | |
1550 | goto unlock; | |
1551 | ||
1552 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1553 | tt_req_node->issued_at = jiffies; | |
1554 | ||
807736f6 | 1555 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 1556 | unlock: |
807736f6 | 1557 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1558 | return tt_req_node; |
1559 | } | |
1560 | ||
058d0e26 | 1561 | /* data_ptr is useless here, but has to be kept to respect the prototype */ |
a513088d SE |
1562 | static int batadv_tt_local_valid_entry(const void *entry_ptr, |
1563 | const void *data_ptr) | |
058d0e26 | 1564 | { |
56303d34 | 1565 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1566 | |
acd34afa | 1567 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1568 | return 0; |
1569 | return 1; | |
1570 | } | |
1571 | ||
a513088d SE |
1572 | static int batadv_tt_global_valid(const void *entry_ptr, |
1573 | const void *data_ptr) | |
a73105b8 | 1574 | { |
56303d34 SE |
1575 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1576 | const struct batadv_tt_global_entry *tt_global_entry; | |
1577 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1578 | |
30cfd02b AQ |
1579 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
1580 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
1581 | return 0; |
1582 | ||
56303d34 SE |
1583 | tt_global_entry = container_of(tt_common_entry, |
1584 | struct batadv_tt_global_entry, | |
48100bac AQ |
1585 | common); |
1586 | ||
a513088d | 1587 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1588 | } |
1589 | ||
a513088d SE |
1590 | static struct sk_buff * |
1591 | batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, | |
5bf74e9c | 1592 | struct batadv_hashtable *hash, |
56303d34 | 1593 | struct batadv_hard_iface *primary_if, |
a513088d SE |
1594 | int (*valid_cb)(const void *, const void *), |
1595 | void *cb_data) | |
a73105b8 | 1596 | { |
56303d34 | 1597 | struct batadv_tt_common_entry *tt_common_entry; |
96412690 SE |
1598 | struct batadv_tt_query_packet *tt_response; |
1599 | struct batadv_tt_change *tt_change; | |
a73105b8 AQ |
1600 | struct hlist_node *node; |
1601 | struct hlist_head *head; | |
1602 | struct sk_buff *skb = NULL; | |
1603 | uint16_t tt_tot, tt_count; | |
96412690 | 1604 | ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet); |
c90681b8 | 1605 | uint32_t i; |
96412690 | 1606 | size_t len; |
a73105b8 AQ |
1607 | |
1608 | if (tt_query_size + tt_len > primary_if->soft_iface->mtu) { | |
1609 | tt_len = primary_if->soft_iface->mtu - tt_query_size; | |
96412690 | 1610 | tt_len -= tt_len % sizeof(struct batadv_tt_change); |
a73105b8 | 1611 | } |
96412690 | 1612 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1613 | |
96412690 | 1614 | len = tt_query_size + tt_len; |
5b246574 | 1615 | skb = dev_alloc_skb(len + ETH_HLEN + NET_IP_ALIGN); |
a73105b8 AQ |
1616 | if (!skb) |
1617 | goto out; | |
1618 | ||
5b246574 | 1619 | skb_reserve(skb, ETH_HLEN + NET_IP_ALIGN); |
96412690 | 1620 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len); |
a73105b8 | 1621 | tt_response->ttvn = ttvn; |
a73105b8 | 1622 | |
96412690 | 1623 | tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size); |
a73105b8 AQ |
1624 | tt_count = 0; |
1625 | ||
1626 | rcu_read_lock(); | |
1627 | for (i = 0; i < hash->size; i++) { | |
1628 | head = &hash->table[i]; | |
1629 | ||
48100bac | 1630 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 AQ |
1631 | head, hash_entry) { |
1632 | if (tt_count == tt_tot) | |
1633 | break; | |
1634 | ||
48100bac | 1635 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1636 | continue; |
1637 | ||
48100bac AQ |
1638 | memcpy(tt_change->addr, tt_common_entry->addr, |
1639 | ETH_ALEN); | |
27b37ebf | 1640 | tt_change->flags = tt_common_entry->flags; |
a73105b8 AQ |
1641 | |
1642 | tt_count++; | |
1643 | tt_change++; | |
1644 | } | |
1645 | } | |
1646 | rcu_read_unlock(); | |
1647 | ||
9d852393 | 1648 | /* store in the message the number of entries we have successfully |
9cfc7bd6 SE |
1649 | * copied |
1650 | */ | |
9d852393 AQ |
1651 | tt_response->tt_data = htons(tt_count); |
1652 | ||
a73105b8 AQ |
1653 | out: |
1654 | return skb; | |
1655 | } | |
1656 | ||
56303d34 SE |
1657 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1658 | struct batadv_orig_node *dst_orig_node, | |
a513088d SE |
1659 | uint8_t ttvn, uint16_t tt_crc, |
1660 | bool full_table) | |
a73105b8 AQ |
1661 | { |
1662 | struct sk_buff *skb = NULL; | |
96412690 | 1663 | struct batadv_tt_query_packet *tt_request; |
56303d34 SE |
1664 | struct batadv_hard_iface *primary_if; |
1665 | struct batadv_tt_req_node *tt_req_node = NULL; | |
a73105b8 | 1666 | int ret = 1; |
96412690 | 1667 | size_t tt_req_len; |
a73105b8 | 1668 | |
e5d89254 | 1669 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1670 | if (!primary_if) |
1671 | goto out; | |
1672 | ||
1673 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1674 | * reply from the same orig_node yet |
1675 | */ | |
a513088d | 1676 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1677 | if (!tt_req_node) |
1678 | goto out; | |
1679 | ||
5b246574 | 1680 | skb = dev_alloc_skb(sizeof(*tt_request) + ETH_HLEN + NET_IP_ALIGN); |
a73105b8 AQ |
1681 | if (!skb) |
1682 | goto out; | |
1683 | ||
5b246574 | 1684 | skb_reserve(skb, ETH_HLEN + NET_IP_ALIGN); |
a73105b8 | 1685 | |
96412690 SE |
1686 | tt_req_len = sizeof(*tt_request); |
1687 | tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len); | |
a73105b8 | 1688 | |
acd34afa | 1689 | tt_request->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1690 | tt_request->header.version = BATADV_COMPAT_VERSION; |
a73105b8 AQ |
1691 | memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1692 | memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); | |
42d0b044 | 1693 | tt_request->header.ttl = BATADV_TTL; |
a73105b8 | 1694 | tt_request->ttvn = ttvn; |
6d2003fc | 1695 | tt_request->tt_data = htons(tt_crc); |
acd34afa | 1696 | tt_request->flags = BATADV_TT_REQUEST; |
a73105b8 AQ |
1697 | |
1698 | if (full_table) | |
acd34afa | 1699 | tt_request->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1700 | |
bb351ba0 MH |
1701 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
1702 | dst_orig_node->orig, (full_table ? 'F' : '.')); | |
a73105b8 | 1703 | |
d69909d2 | 1704 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
f8214865 | 1705 | |
bb351ba0 MH |
1706 | if (batadv_send_skb_to_orig(skb, dst_orig_node, NULL)) |
1707 | ret = 0; | |
a73105b8 AQ |
1708 | |
1709 | out: | |
a73105b8 | 1710 | if (primary_if) |
e5d89254 | 1711 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1712 | if (ret) |
1713 | kfree_skb(skb); | |
1714 | if (ret && tt_req_node) { | |
807736f6 | 1715 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1716 | list_del(&tt_req_node->list); |
807736f6 | 1717 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1718 | kfree(tt_req_node); |
1719 | } | |
1720 | return ret; | |
1721 | } | |
1722 | ||
96412690 | 1723 | static bool |
56303d34 | 1724 | batadv_send_other_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1725 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1726 | { |
170173bf | 1727 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 1728 | struct batadv_orig_node *res_dst_orig_node = NULL; |
56303d34 | 1729 | struct batadv_hard_iface *primary_if = NULL; |
a73105b8 AQ |
1730 | uint8_t orig_ttvn, req_ttvn, ttvn; |
1731 | int ret = false; | |
1732 | unsigned char *tt_buff; | |
1733 | bool full_table; | |
1734 | uint16_t tt_len, tt_tot; | |
1735 | struct sk_buff *skb = NULL; | |
96412690 | 1736 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1737 | uint8_t *packet_pos; |
96412690 | 1738 | size_t len; |
a73105b8 | 1739 | |
39c75a51 | 1740 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1741 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
1742 | tt_request->src, tt_request->ttvn, tt_request->dst, | |
acd34afa | 1743 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1744 | |
1745 | /* Let's get the orig node of the REAL destination */ | |
da641193 | 1746 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); |
a73105b8 AQ |
1747 | if (!req_dst_orig_node) |
1748 | goto out; | |
1749 | ||
da641193 | 1750 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1751 | if (!res_dst_orig_node) |
1752 | goto out; | |
1753 | ||
e5d89254 | 1754 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1755 | if (!primary_if) |
1756 | goto out; | |
1757 | ||
1758 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); | |
1759 | req_ttvn = tt_request->ttvn; | |
1760 | ||
015758d0 | 1761 | /* I don't have the requested data */ |
a73105b8 | 1762 | if (orig_ttvn != req_ttvn || |
f25bd58a | 1763 | tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1764 | goto out; |
1765 | ||
015758d0 | 1766 | /* If the full table has been explicitly requested */ |
acd34afa | 1767 | if (tt_request->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1768 | !req_dst_orig_node->tt_buff) |
1769 | full_table = true; | |
1770 | else | |
1771 | full_table = false; | |
1772 | ||
1773 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1774 | * I'll send only one packet with as much TT entries as I can |
1775 | */ | |
a73105b8 AQ |
1776 | if (!full_table) { |
1777 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1778 | tt_len = req_dst_orig_node->tt_buff_len; | |
96412690 | 1779 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1780 | |
96412690 | 1781 | len = sizeof(*tt_response) + tt_len; |
5b246574 | 1782 | skb = dev_alloc_skb(len + ETH_HLEN + NET_IP_ALIGN); |
a73105b8 AQ |
1783 | if (!skb) |
1784 | goto unlock; | |
1785 | ||
5b246574 | 1786 | skb_reserve(skb, ETH_HLEN + NET_IP_ALIGN); |
c67893d1 SE |
1787 | packet_pos = skb_put(skb, len); |
1788 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1789 | tt_response->ttvn = req_ttvn; |
1790 | tt_response->tt_data = htons(tt_tot); | |
1791 | ||
96412690 | 1792 | tt_buff = skb->data + sizeof(*tt_response); |
a73105b8 AQ |
1793 | /* Copy the last orig_node's OGM buffer */ |
1794 | memcpy(tt_buff, req_dst_orig_node->tt_buff, | |
1795 | req_dst_orig_node->tt_buff_len); | |
1796 | ||
1797 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1798 | } else { | |
96412690 SE |
1799 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
1800 | tt_len *= sizeof(struct batadv_tt_change); | |
a73105b8 AQ |
1801 | ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
1802 | ||
a513088d | 1803 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1804 | bat_priv->tt.global_hash, |
a513088d SE |
1805 | primary_if, |
1806 | batadv_tt_global_valid, | |
1807 | req_dst_orig_node); | |
a73105b8 AQ |
1808 | if (!skb) |
1809 | goto out; | |
1810 | ||
96412690 | 1811 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1812 | } |
1813 | ||
acd34afa | 1814 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1815 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1816 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1817 | memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); |
1818 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1819 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1820 | |
1821 | if (full_table) | |
acd34afa | 1822 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1823 | |
39c75a51 | 1824 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
1825 | "Sending TT_RESPONSE %pM for %pM (ttvn: %u)\n", |
1826 | res_dst_orig_node->orig, req_dst_orig_node->orig, req_ttvn); | |
a73105b8 | 1827 | |
d69909d2 | 1828 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1829 | |
bb351ba0 MH |
1830 | if (batadv_send_skb_to_orig(skb, res_dst_orig_node, NULL)) |
1831 | ret = true; | |
a73105b8 AQ |
1832 | goto out; |
1833 | ||
1834 | unlock: | |
1835 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1836 | ||
1837 | out: | |
1838 | if (res_dst_orig_node) | |
7d211efc | 1839 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1840 | if (req_dst_orig_node) |
7d211efc | 1841 | batadv_orig_node_free_ref(req_dst_orig_node); |
a73105b8 | 1842 | if (primary_if) |
e5d89254 | 1843 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1844 | if (!ret) |
1845 | kfree_skb(skb); | |
1846 | return ret; | |
a73105b8 | 1847 | } |
96412690 SE |
1848 | |
1849 | static bool | |
56303d34 | 1850 | batadv_send_my_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1851 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1852 | { |
170173bf | 1853 | struct batadv_orig_node *orig_node; |
56303d34 | 1854 | struct batadv_hard_iface *primary_if = NULL; |
a73105b8 AQ |
1855 | uint8_t my_ttvn, req_ttvn, ttvn; |
1856 | int ret = false; | |
1857 | unsigned char *tt_buff; | |
1858 | bool full_table; | |
1859 | uint16_t tt_len, tt_tot; | |
1860 | struct sk_buff *skb = NULL; | |
96412690 | 1861 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1862 | uint8_t *packet_pos; |
96412690 | 1863 | size_t len; |
a73105b8 | 1864 | |
39c75a51 | 1865 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1866 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
1867 | tt_request->src, tt_request->ttvn, | |
acd34afa | 1868 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1869 | |
1870 | ||
807736f6 | 1871 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 AQ |
1872 | req_ttvn = tt_request->ttvn; |
1873 | ||
da641193 | 1874 | orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1875 | if (!orig_node) |
1876 | goto out; | |
1877 | ||
e5d89254 | 1878 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1879 | if (!primary_if) |
1880 | goto out; | |
1881 | ||
1882 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1883 | * is too big send the whole local translation table |
1884 | */ | |
acd34afa | 1885 | if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 1886 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
1887 | full_table = true; |
1888 | else | |
1889 | full_table = false; | |
1890 | ||
1891 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1892 | * I'll send only one packet with as much TT entries as I can |
1893 | */ | |
a73105b8 | 1894 | if (!full_table) { |
807736f6 SE |
1895 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1896 | tt_len = bat_priv->tt.last_changeset_len; | |
96412690 | 1897 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1898 | |
96412690 | 1899 | len = sizeof(*tt_response) + tt_len; |
5b246574 | 1900 | skb = dev_alloc_skb(len + ETH_HLEN + NET_IP_ALIGN); |
a73105b8 AQ |
1901 | if (!skb) |
1902 | goto unlock; | |
1903 | ||
5b246574 | 1904 | skb_reserve(skb, ETH_HLEN + NET_IP_ALIGN); |
c67893d1 SE |
1905 | packet_pos = skb_put(skb, len); |
1906 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1907 | tt_response->ttvn = req_ttvn; |
1908 | tt_response->tt_data = htons(tt_tot); | |
1909 | ||
96412690 | 1910 | tt_buff = skb->data + sizeof(*tt_response); |
807736f6 SE |
1911 | memcpy(tt_buff, bat_priv->tt.last_changeset, |
1912 | bat_priv->tt.last_changeset_len); | |
1913 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 1914 | } else { |
807736f6 | 1915 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
96412690 | 1916 | tt_len *= sizeof(struct batadv_tt_change); |
807736f6 | 1917 | ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 | 1918 | |
a513088d | 1919 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1920 | bat_priv->tt.local_hash, |
a513088d SE |
1921 | primary_if, |
1922 | batadv_tt_local_valid_entry, | |
1923 | NULL); | |
a73105b8 AQ |
1924 | if (!skb) |
1925 | goto out; | |
1926 | ||
96412690 | 1927 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1928 | } |
1929 | ||
acd34afa | 1930 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1931 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1932 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1933 | memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1934 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1935 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1936 | |
1937 | if (full_table) | |
acd34afa | 1938 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1939 | |
39c75a51 | 1940 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
1941 | "Sending TT_RESPONSE to %pM [%c]\n", |
1942 | orig_node->orig, | |
acd34afa | 1943 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1944 | |
d69909d2 | 1945 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1946 | |
bb351ba0 MH |
1947 | if (batadv_send_skb_to_orig(skb, orig_node, NULL)) |
1948 | ret = true; | |
a73105b8 AQ |
1949 | goto out; |
1950 | ||
1951 | unlock: | |
807736f6 | 1952 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 AQ |
1953 | out: |
1954 | if (orig_node) | |
7d211efc | 1955 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1956 | if (primary_if) |
e5d89254 | 1957 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1958 | if (!ret) |
1959 | kfree_skb(skb); | |
1960 | /* This packet was for me, so it doesn't need to be re-routed */ | |
1961 | return true; | |
1962 | } | |
1963 | ||
56303d34 | 1964 | bool batadv_send_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1965 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1966 | { |
3193e8fd | 1967 | if (batadv_is_my_mac(tt_request->dst)) { |
20ff9d59 | 1968 | /* don't answer backbone gws! */ |
08adf151 | 1969 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) |
20ff9d59 SW |
1970 | return true; |
1971 | ||
a513088d | 1972 | return batadv_send_my_tt_response(bat_priv, tt_request); |
20ff9d59 | 1973 | } else { |
a513088d | 1974 | return batadv_send_other_tt_response(bat_priv, tt_request); |
20ff9d59 | 1975 | } |
a73105b8 AQ |
1976 | } |
1977 | ||
56303d34 SE |
1978 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1979 | struct batadv_orig_node *orig_node, | |
96412690 | 1980 | struct batadv_tt_change *tt_change, |
a513088d | 1981 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
1982 | { |
1983 | int i; | |
a513088d | 1984 | int roams; |
a73105b8 AQ |
1985 | |
1986 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
1987 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
1988 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
1989 | batadv_tt_global_del(bat_priv, orig_node, |
1990 | (tt_change + i)->addr, | |
d4f44692 AQ |
1991 | "tt removed by changes", |
1992 | roams); | |
08c36d3e | 1993 | } else { |
08c36d3e | 1994 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 AQ |
1995 | (tt_change + i)->addr, |
1996 | (tt_change + i)->flags, ttvn)) | |
a73105b8 AQ |
1997 | /* In case of problem while storing a |
1998 | * global_entry, we stop the updating | |
1999 | * procedure without committing the | |
2000 | * ttvn change. This will avoid to send | |
2001 | * corrupted data on tt_request | |
2002 | */ | |
2003 | return; | |
08c36d3e | 2004 | } |
a73105b8 | 2005 | } |
17071578 | 2006 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2007 | } |
2008 | ||
56303d34 | 2009 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
96412690 | 2010 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 2011 | { |
170173bf | 2012 | struct batadv_orig_node *orig_node; |
a73105b8 | 2013 | |
da641193 | 2014 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
2015 | if (!orig_node) |
2016 | goto out; | |
2017 | ||
2018 | /* Purge the old table first.. */ | |
08c36d3e | 2019 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 2020 | |
a513088d | 2021 | _batadv_tt_update_changes(bat_priv, orig_node, |
96412690 | 2022 | (struct batadv_tt_change *)(tt_response + 1), |
a513088d SE |
2023 | ntohs(tt_response->tt_data), |
2024 | tt_response->ttvn); | |
a73105b8 AQ |
2025 | |
2026 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2027 | kfree(orig_node->tt_buff); | |
2028 | orig_node->tt_buff_len = 0; | |
2029 | orig_node->tt_buff = NULL; | |
2030 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2031 | ||
2032 | atomic_set(&orig_node->last_ttvn, tt_response->ttvn); | |
2033 | ||
2034 | out: | |
2035 | if (orig_node) | |
7d211efc | 2036 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2037 | } |
2038 | ||
56303d34 SE |
2039 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2040 | struct batadv_orig_node *orig_node, | |
a513088d | 2041 | uint16_t tt_num_changes, uint8_t ttvn, |
96412690 | 2042 | struct batadv_tt_change *tt_change) |
a73105b8 | 2043 | { |
a513088d SE |
2044 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2045 | tt_num_changes, ttvn); | |
a73105b8 | 2046 | |
a513088d SE |
2047 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
2048 | (unsigned char *)tt_change, tt_num_changes); | |
a73105b8 AQ |
2049 | atomic_set(&orig_node->last_ttvn, ttvn); |
2050 | } | |
2051 | ||
56303d34 | 2052 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 2053 | { |
170173bf | 2054 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2055 | bool ret = false; |
a73105b8 | 2056 | |
a513088d | 2057 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
2058 | if (!tt_local_entry) |
2059 | goto out; | |
058d0e26 | 2060 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2061 | * consistency purpose) |
2062 | */ | |
7c1fd91d AQ |
2063 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2064 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2065 | goto out; |
7683fdc1 AQ |
2066 | ret = true; |
2067 | out: | |
a73105b8 | 2068 | if (tt_local_entry) |
a513088d | 2069 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2070 | return ret; |
a73105b8 AQ |
2071 | } |
2072 | ||
56303d34 | 2073 | void batadv_handle_tt_response(struct batadv_priv *bat_priv, |
96412690 | 2074 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 2075 | { |
56303d34 SE |
2076 | struct batadv_tt_req_node *node, *safe; |
2077 | struct batadv_orig_node *orig_node = NULL; | |
96412690 | 2078 | struct batadv_tt_change *tt_change; |
a73105b8 | 2079 | |
39c75a51 | 2080 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2081 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
2082 | tt_response->src, tt_response->ttvn, | |
2083 | ntohs(tt_response->tt_data), | |
acd34afa | 2084 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 2085 | |
20ff9d59 | 2086 | /* we should have never asked a backbone gw */ |
08adf151 | 2087 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) |
20ff9d59 SW |
2088 | goto out; |
2089 | ||
da641193 | 2090 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
2091 | if (!orig_node) |
2092 | goto out; | |
2093 | ||
96412690 | 2094 | if (tt_response->flags & BATADV_TT_FULL_TABLE) { |
a513088d | 2095 | batadv_tt_fill_gtable(bat_priv, tt_response); |
96412690 SE |
2096 | } else { |
2097 | tt_change = (struct batadv_tt_change *)(tt_response + 1); | |
a513088d SE |
2098 | batadv_tt_update_changes(bat_priv, orig_node, |
2099 | ntohs(tt_response->tt_data), | |
96412690 SE |
2100 | tt_response->ttvn, tt_change); |
2101 | } | |
a73105b8 AQ |
2102 | |
2103 | /* Delete the tt_req_node from pending tt_requests list */ | |
807736f6 SE |
2104 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2105 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
1eda58bf | 2106 | if (!batadv_compare_eth(node->addr, tt_response->src)) |
a73105b8 AQ |
2107 | continue; |
2108 | list_del(&node->list); | |
2109 | kfree(node); | |
2110 | } | |
807736f6 | 2111 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2112 | |
2113 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 2114 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a73105b8 AQ |
2115 | out: |
2116 | if (orig_node) | |
7d211efc | 2117 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2118 | } |
2119 | ||
56303d34 | 2120 | int batadv_tt_init(struct batadv_priv *bat_priv) |
a73105b8 | 2121 | { |
5346c35e | 2122 | int ret; |
a73105b8 | 2123 | |
a513088d | 2124 | ret = batadv_tt_local_init(bat_priv); |
5346c35e SE |
2125 | if (ret < 0) |
2126 | return ret; | |
2127 | ||
a513088d | 2128 | ret = batadv_tt_global_init(bat_priv); |
5346c35e SE |
2129 | if (ret < 0) |
2130 | return ret; | |
a73105b8 | 2131 | |
72414442 AQ |
2132 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
2133 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
2134 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 AQ |
2135 | |
2136 | return 1; | |
2137 | } | |
2138 | ||
56303d34 | 2139 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2140 | { |
56303d34 | 2141 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2142 | |
807736f6 | 2143 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2144 | |
807736f6 | 2145 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2146 | list_del(&node->list); |
2147 | kfree(node); | |
2148 | } | |
2149 | ||
807736f6 | 2150 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2151 | } |
2152 | ||
56303d34 | 2153 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2154 | { |
56303d34 | 2155 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2156 | |
807736f6 SE |
2157 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2158 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2159 | if (!batadv_has_timed_out(node->first_time, |
2160 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2161 | continue; |
2162 | ||
2163 | list_del(&node->list); | |
2164 | kfree(node); | |
2165 | } | |
807736f6 | 2166 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2167 | } |
2168 | ||
2169 | /* This function checks whether the client already reached the | |
2170 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2171 | * will not be sent. | |
2172 | * | |
9cfc7bd6 SE |
2173 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2174 | */ | |
56303d34 | 2175 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2176 | uint8_t *client) |
cc47f66e | 2177 | { |
56303d34 | 2178 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2179 | bool ret = false; |
2180 | ||
807736f6 | 2181 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2182 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2183 | * reply from the same orig_node yet |
2184 | */ | |
807736f6 | 2185 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2186 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2187 | continue; |
2188 | ||
1eda58bf | 2189 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2190 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2191 | continue; |
2192 | ||
3e34819e | 2193 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2194 | /* Sorry, you roamed too many times! */ |
2195 | goto unlock; | |
2196 | ret = true; | |
2197 | break; | |
2198 | } | |
2199 | ||
2200 | if (!ret) { | |
2201 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2202 | if (!tt_roam_node) | |
2203 | goto unlock; | |
2204 | ||
2205 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2206 | atomic_set(&tt_roam_node->counter, |
2207 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2208 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2209 | ||
807736f6 | 2210 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2211 | ret = true; |
2212 | } | |
2213 | ||
2214 | unlock: | |
807736f6 | 2215 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2216 | return ret; |
2217 | } | |
2218 | ||
56303d34 SE |
2219 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
2220 | struct batadv_orig_node *orig_node) | |
cc47f66e | 2221 | { |
cc47f66e | 2222 | struct sk_buff *skb = NULL; |
96412690 | 2223 | struct batadv_roam_adv_packet *roam_adv_packet; |
cc47f66e | 2224 | int ret = 1; |
56303d34 | 2225 | struct batadv_hard_iface *primary_if; |
96412690 | 2226 | size_t len = sizeof(*roam_adv_packet); |
cc47f66e AQ |
2227 | |
2228 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2229 | * already roamed to us too many times |
2230 | */ | |
a513088d | 2231 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2232 | goto out; |
2233 | ||
5b246574 | 2234 | skb = dev_alloc_skb(sizeof(*roam_adv_packet) + ETH_HLEN + NET_IP_ALIGN); |
cc47f66e AQ |
2235 | if (!skb) |
2236 | goto out; | |
2237 | ||
5b246574 | 2238 | skb_reserve(skb, ETH_HLEN + NET_IP_ALIGN); |
cc47f66e | 2239 | |
96412690 | 2240 | roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len); |
cc47f66e | 2241 | |
acd34afa | 2242 | roam_adv_packet->header.packet_type = BATADV_ROAM_ADV; |
7e071c79 | 2243 | roam_adv_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 2244 | roam_adv_packet->header.ttl = BATADV_TTL; |
162d549c | 2245 | roam_adv_packet->reserved = 0; |
e5d89254 | 2246 | primary_if = batadv_primary_if_get_selected(bat_priv); |
cc47f66e AQ |
2247 | if (!primary_if) |
2248 | goto out; | |
2249 | memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
e5d89254 | 2250 | batadv_hardif_free_ref(primary_if); |
cc47f66e AQ |
2251 | memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); |
2252 | memcpy(roam_adv_packet->client, client, ETH_ALEN); | |
2253 | ||
39c75a51 | 2254 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
2255 | "Sending ROAMING_ADV to %pM (client %pM)\n", |
2256 | orig_node->orig, client); | |
cc47f66e | 2257 | |
d69909d2 | 2258 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2259 | |
bb351ba0 MH |
2260 | if (batadv_send_skb_to_orig(skb, orig_node, NULL)) |
2261 | ret = 0; | |
cc47f66e AQ |
2262 | |
2263 | out: | |
bb351ba0 | 2264 | if (ret && skb) |
cc47f66e AQ |
2265 | kfree_skb(skb); |
2266 | return; | |
a73105b8 AQ |
2267 | } |
2268 | ||
a513088d | 2269 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2270 | { |
56303d34 | 2271 | struct delayed_work *delayed_work; |
807736f6 | 2272 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2273 | struct batadv_priv *bat_priv; |
2274 | ||
2275 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2276 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2277 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2278 | |
a513088d | 2279 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2280 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2281 | batadv_tt_req_purge(bat_priv); |
2282 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2283 | |
72414442 AQ |
2284 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2285 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2286 | } |
cc47f66e | 2287 | |
56303d34 | 2288 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2289 | { |
807736f6 | 2290 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2291 | |
a513088d SE |
2292 | batadv_tt_local_table_free(bat_priv); |
2293 | batadv_tt_global_table_free(bat_priv); | |
2294 | batadv_tt_req_list_free(bat_priv); | |
2295 | batadv_tt_changes_list_free(bat_priv); | |
2296 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2297 | |
807736f6 | 2298 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2299 | } |
058d0e26 | 2300 | |
697f2531 | 2301 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2302 | * in the given hash table and returns the number of modified entries |
2303 | */ | |
5bf74e9c SE |
2304 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2305 | uint16_t flags, bool enable) | |
058d0e26 | 2306 | { |
c90681b8 | 2307 | uint32_t i; |
697f2531 | 2308 | uint16_t changed_num = 0; |
058d0e26 AQ |
2309 | struct hlist_head *head; |
2310 | struct hlist_node *node; | |
56303d34 | 2311 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2312 | |
2313 | if (!hash) | |
697f2531 | 2314 | goto out; |
058d0e26 AQ |
2315 | |
2316 | for (i = 0; i < hash->size; i++) { | |
2317 | head = &hash->table[i]; | |
2318 | ||
2319 | rcu_read_lock(); | |
48100bac | 2320 | hlist_for_each_entry_rcu(tt_common_entry, node, |
058d0e26 | 2321 | head, hash_entry) { |
697f2531 AQ |
2322 | if (enable) { |
2323 | if ((tt_common_entry->flags & flags) == flags) | |
2324 | continue; | |
2325 | tt_common_entry->flags |= flags; | |
2326 | } else { | |
2327 | if (!(tt_common_entry->flags & flags)) | |
2328 | continue; | |
2329 | tt_common_entry->flags &= ~flags; | |
2330 | } | |
2331 | changed_num++; | |
058d0e26 AQ |
2332 | } |
2333 | rcu_read_unlock(); | |
2334 | } | |
697f2531 AQ |
2335 | out: |
2336 | return changed_num; | |
058d0e26 AQ |
2337 | } |
2338 | ||
acd34afa | 2339 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2340 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2341 | { |
807736f6 | 2342 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2343 | struct batadv_tt_common_entry *tt_common; |
2344 | struct batadv_tt_local_entry *tt_local; | |
058d0e26 AQ |
2345 | struct hlist_node *node, *node_tmp; |
2346 | struct hlist_head *head; | |
2347 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2348 | uint32_t i; |
058d0e26 AQ |
2349 | |
2350 | if (!hash) | |
2351 | return; | |
2352 | ||
2353 | for (i = 0; i < hash->size; i++) { | |
2354 | head = &hash->table[i]; | |
2355 | list_lock = &hash->list_locks[i]; | |
2356 | ||
2357 | spin_lock_bh(list_lock); | |
acd34afa SE |
2358 | hlist_for_each_entry_safe(tt_common, node, node_tmp, head, |
2359 | hash_entry) { | |
2360 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2361 | continue; |
2362 | ||
39c75a51 | 2363 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2364 | "Deleting local tt entry (%pM): pending\n", |
acd34afa | 2365 | tt_common->addr); |
058d0e26 | 2366 | |
807736f6 | 2367 | atomic_dec(&bat_priv->tt.local_entry_num); |
058d0e26 | 2368 | hlist_del_rcu(node); |
56303d34 SE |
2369 | tt_local = container_of(tt_common, |
2370 | struct batadv_tt_local_entry, | |
2371 | common); | |
2372 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2373 | } |
2374 | spin_unlock_bh(list_lock); | |
2375 | } | |
058d0e26 AQ |
2376 | } |
2377 | ||
56303d34 | 2378 | static int batadv_tt_commit_changes(struct batadv_priv *bat_priv, |
a513088d SE |
2379 | unsigned char **packet_buff, |
2380 | int *packet_buff_len, int packet_min_len) | |
058d0e26 | 2381 | { |
be9aa4c1 ML |
2382 | uint16_t changed_num = 0; |
2383 | ||
807736f6 | 2384 | if (atomic_read(&bat_priv->tt.local_changes) < 1) |
be9aa4c1 ML |
2385 | return -ENOENT; |
2386 | ||
807736f6 | 2387 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
acd34afa | 2388 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2389 | |
2390 | /* all reset entries have to be counted as local entries */ | |
807736f6 | 2391 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
a513088d | 2392 | batadv_tt_local_purge_pending_clients(bat_priv); |
807736f6 | 2393 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2394 | |
2395 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2396 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2397 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2398 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2399 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2400 | |
2401 | /* reset the sending counter */ | |
807736f6 | 2402 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
be9aa4c1 | 2403 | |
a513088d SE |
2404 | return batadv_tt_changes_fill_buff(bat_priv, packet_buff, |
2405 | packet_buff_len, packet_min_len); | |
be9aa4c1 ML |
2406 | } |
2407 | ||
2408 | /* when calling this function (hard_iface == primary_if) has to be true */ | |
56303d34 | 2409 | int batadv_tt_append_diff(struct batadv_priv *bat_priv, |
be9aa4c1 ML |
2410 | unsigned char **packet_buff, int *packet_buff_len, |
2411 | int packet_min_len) | |
2412 | { | |
2413 | int tt_num_changes; | |
2414 | ||
2415 | /* if at least one change happened */ | |
a513088d SE |
2416 | tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, |
2417 | packet_buff_len, | |
2418 | packet_min_len); | |
be9aa4c1 ML |
2419 | |
2420 | /* if the changes have been sent often enough */ | |
2421 | if ((tt_num_changes < 0) && | |
807736f6 | 2422 | (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))) { |
a513088d SE |
2423 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
2424 | packet_min_len, packet_min_len); | |
be9aa4c1 ML |
2425 | tt_num_changes = 0; |
2426 | } | |
2427 | ||
2428 | return tt_num_changes; | |
058d0e26 | 2429 | } |
59b699cd | 2430 | |
56303d34 | 2431 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
08c36d3e | 2432 | uint8_t *dst) |
59b699cd | 2433 | { |
56303d34 SE |
2434 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2435 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2436 | bool ret = false; |
59b699cd AQ |
2437 | |
2438 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2439 | goto out; |
59b699cd | 2440 | |
a513088d | 2441 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2442 | if (!tt_local_entry) |
2443 | goto out; | |
2444 | ||
a513088d | 2445 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2446 | if (!tt_global_entry) |
2447 | goto out; | |
2448 | ||
1f129fef | 2449 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2450 | goto out; |
2451 | ||
5870adc6 | 2452 | ret = true; |
59b699cd AQ |
2453 | |
2454 | out: | |
2455 | if (tt_global_entry) | |
a513088d | 2456 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2457 | if (tt_local_entry) |
a513088d | 2458 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2459 | return ret; |
2460 | } | |
a943cac1 | 2461 | |
56303d34 SE |
2462 | void batadv_tt_update_orig(struct batadv_priv *bat_priv, |
2463 | struct batadv_orig_node *orig_node, | |
08c36d3e SE |
2464 | const unsigned char *tt_buff, uint8_t tt_num_changes, |
2465 | uint8_t ttvn, uint16_t tt_crc) | |
a943cac1 ML |
2466 | { |
2467 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2468 | bool full_table = true; | |
96412690 | 2469 | struct batadv_tt_change *tt_change; |
a943cac1 | 2470 | |
20ff9d59 | 2471 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2472 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2473 | return; |
2474 | ||
17071578 | 2475 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2476 | * increased by one -> we can apply the attached changes |
2477 | */ | |
17071578 AQ |
2478 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2479 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2480 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2481 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2482 | * times. | |
9cfc7bd6 SE |
2483 | * In this case send a tt request |
2484 | */ | |
a943cac1 ML |
2485 | if (!tt_num_changes) { |
2486 | full_table = false; | |
2487 | goto request_table; | |
2488 | } | |
2489 | ||
96412690 | 2490 | tt_change = (struct batadv_tt_change *)tt_buff; |
a513088d | 2491 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2492 | ttvn, tt_change); |
a943cac1 ML |
2493 | |
2494 | /* Even if we received the precomputed crc with the OGM, we | |
2495 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2496 | * in the global table |
2497 | */ | |
a513088d | 2498 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2499 | |
2500 | /* The ttvn alone is not enough to guarantee consistency | |
2501 | * because a single value could represent different states | |
2502 | * (due to the wrap around). Thus a node has to check whether | |
2503 | * the resulting table (after applying the changes) is still | |
2504 | * consistent or not. E.g. a node could disconnect while its | |
2505 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2506 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2507 | * inconsistency |
2508 | */ | |
a943cac1 ML |
2509 | if (orig_node->tt_crc != tt_crc) |
2510 | goto request_table; | |
a943cac1 ML |
2511 | } else { |
2512 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2513 | * in sync anymore -> request fresh tt data |
2514 | */ | |
17071578 AQ |
2515 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2516 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2517 | request_table: |
39c75a51 | 2518 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
39a32991 | 2519 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %#.4x last_crc: %#.4x num_changes: %u)\n", |
1eda58bf SE |
2520 | orig_node->orig, ttvn, orig_ttvn, tt_crc, |
2521 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2522 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2523 | tt_crc, full_table); | |
a943cac1 ML |
2524 | return; |
2525 | } | |
2526 | } | |
2527 | } | |
3275e7cc AQ |
2528 | |
2529 | /* returns true whether we know that the client has moved from its old | |
2530 | * originator to another one. This entry is kept is still kept for consistency | |
2531 | * purposes | |
2532 | */ | |
56303d34 | 2533 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
08c36d3e | 2534 | uint8_t *addr) |
3275e7cc | 2535 | { |
56303d34 | 2536 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2537 | bool ret = false; |
2538 | ||
a513088d | 2539 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2540 | if (!tt_global_entry) |
2541 | goto out; | |
2542 | ||
9f9ff08d | 2543 | ret = !!(tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM); |
a513088d | 2544 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2545 | out: |
2546 | return ret; | |
2547 | } | |
30cfd02b | 2548 | |
7c1fd91d AQ |
2549 | /** |
2550 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
2551 | * @bat_priv: the bat priv with all the soft interface information | |
2552 | * @addr: the MAC address of the local client to query | |
2553 | * | |
2554 | * Returns true if the local client is known to be roaming (it is not served by | |
2555 | * this node anymore) or not. If yes, the client is still present in the table | |
2556 | * to keep the latter consistent with the node TTVN | |
2557 | */ | |
2558 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
2559 | uint8_t *addr) | |
2560 | { | |
2561 | struct batadv_tt_local_entry *tt_local_entry; | |
2562 | bool ret = false; | |
2563 | ||
2564 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); | |
2565 | if (!tt_local_entry) | |
2566 | goto out; | |
2567 | ||
2568 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
2569 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
2570 | out: | |
2571 | return ret; | |
7c1fd91d AQ |
2572 | } |
2573 | ||
30cfd02b AQ |
2574 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
2575 | struct batadv_orig_node *orig_node, | |
2576 | const unsigned char *addr) | |
2577 | { | |
2578 | bool ret = false; | |
2579 | ||
1f36aebc AQ |
2580 | /* if the originator is a backbone node (meaning it belongs to the same |
2581 | * LAN of this node) the temporary client must not be added because to | |
2582 | * reach such destination the node must use the LAN instead of the mesh | |
2583 | */ | |
2584 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) | |
2585 | goto out; | |
2586 | ||
30cfd02b AQ |
2587 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, |
2588 | BATADV_TT_CLIENT_TEMP, | |
2589 | atomic_read(&orig_node->last_ttvn))) | |
2590 | goto out; | |
2591 | ||
2592 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2593 | "Added temporary global client (addr: %pM orig: %pM)\n", | |
2594 | addr, orig_node->orig); | |
2595 | ret = true; | |
2596 | out: | |
2597 | return ret; | |
2598 | } |