Commit | Line | Data |
---|---|---|
0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
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 | 58 | struct hlist_head *head; |
56303d34 SE |
59 | struct batadv_tt_common_entry *tt_common_entry; |
60 | struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; | |
c90681b8 | 61 | uint32_t index; |
7aadf889 ML |
62 | |
63 | if (!hash) | |
64 | return NULL; | |
65 | ||
da641193 | 66 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
67 | head = &hash->table[index]; |
68 | ||
69 | rcu_read_lock(); | |
b67bfe0d | 70 | hlist_for_each_entry_rcu(tt_common_entry, head, hash_entry) { |
1eda58bf | 71 | if (!batadv_compare_eth(tt_common_entry, data)) |
7aadf889 ML |
72 | continue; |
73 | ||
48100bac | 74 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
7683fdc1 AQ |
75 | continue; |
76 | ||
48100bac | 77 | tt_common_entry_tmp = tt_common_entry; |
7aadf889 ML |
78 | break; |
79 | } | |
80 | rcu_read_unlock(); | |
81 | ||
48100bac | 82 | return tt_common_entry_tmp; |
7aadf889 ML |
83 | } |
84 | ||
56303d34 SE |
85 | static struct batadv_tt_local_entry * |
86 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 87 | { |
56303d34 SE |
88 | struct batadv_tt_common_entry *tt_common_entry; |
89 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 90 | |
807736f6 | 91 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); |
48100bac AQ |
92 | if (tt_common_entry) |
93 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
94 | struct batadv_tt_local_entry, |
95 | common); | |
48100bac AQ |
96 | return tt_local_entry; |
97 | } | |
7aadf889 | 98 | |
56303d34 SE |
99 | static struct batadv_tt_global_entry * |
100 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) | |
48100bac | 101 | { |
56303d34 SE |
102 | struct batadv_tt_common_entry *tt_common_entry; |
103 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 104 | |
807736f6 | 105 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); |
48100bac AQ |
106 | if (tt_common_entry) |
107 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
108 | struct batadv_tt_global_entry, |
109 | common); | |
48100bac | 110 | return tt_global_entry; |
7aadf889 ML |
111 | } |
112 | ||
a513088d | 113 | static void |
56303d34 | 114 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 115 | { |
48100bac AQ |
116 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
117 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
118 | } |
119 | ||
a513088d | 120 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) |
531027fc | 121 | { |
56303d34 SE |
122 | struct batadv_tt_common_entry *tt_common_entry; |
123 | struct batadv_tt_global_entry *tt_global_entry; | |
531027fc | 124 | |
56303d34 SE |
125 | tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu); |
126 | tt_global_entry = container_of(tt_common_entry, | |
127 | struct batadv_tt_global_entry, common); | |
531027fc | 128 | |
531027fc SW |
129 | kfree(tt_global_entry); |
130 | } | |
131 | ||
a513088d | 132 | static void |
56303d34 | 133 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 134 | { |
db08e6e5 | 135 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 136 | batadv_tt_global_del_orig_list(tt_global_entry); |
48100bac | 137 | call_rcu(&tt_global_entry->common.rcu, |
a513088d | 138 | batadv_tt_global_entry_free_rcu); |
db08e6e5 SW |
139 | } |
140 | } | |
141 | ||
a513088d | 142 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 143 | { |
56303d34 | 144 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 145 | |
56303d34 | 146 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
72822225 LL |
147 | |
148 | /* We are in an rcu callback here, therefore we cannot use | |
149 | * batadv_orig_node_free_ref() and its call_rcu(): | |
150 | * An rcu_barrier() wouldn't wait for that to finish | |
151 | */ | |
152 | batadv_orig_node_free_ref_now(orig_entry->orig_node); | |
db08e6e5 SW |
153 | kfree(orig_entry); |
154 | } | |
155 | ||
a513088d | 156 | static void |
56303d34 | 157 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 158 | { |
d657e621 AQ |
159 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
160 | return; | |
29cb99de AQ |
161 | /* to avoid race conditions, immediately decrease the tt counter */ |
162 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 163 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
164 | } |
165 | ||
3abe4adb AQ |
166 | /** |
167 | * batadv_tt_local_event - store a local TT event (ADD/DEL) | |
168 | * @bat_priv: the bat priv with all the soft interface information | |
169 | * @tt_local_entry: the TT entry involved in the event | |
170 | * @event_flags: flags to store in the event structure | |
171 | */ | |
56303d34 | 172 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
3abe4adb AQ |
173 | struct batadv_tt_local_entry *tt_local_entry, |
174 | uint8_t event_flags) | |
a73105b8 | 175 | { |
56303d34 | 176 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3abe4adb AQ |
177 | struct batadv_tt_common_entry *common = &tt_local_entry->common; |
178 | uint8_t flags = common->flags | event_flags; | |
3b643de5 AQ |
179 | bool event_removed = false; |
180 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
181 | |
182 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
183 | ||
184 | if (!tt_change_node) | |
185 | return; | |
186 | ||
ff66c975 | 187 | tt_change_node->change.flags = flags; |
3abe4adb | 188 | memcpy(tt_change_node->change.addr, common->addr, ETH_ALEN); |
a73105b8 | 189 | |
acd34afa | 190 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
191 | |
192 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
193 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
194 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 | 195 | list) { |
3abe4adb | 196 | if (!batadv_compare_eth(entry->change.addr, common->addr)) |
3b643de5 AQ |
197 | continue; |
198 | ||
199 | /* DEL+ADD in the same orig interval have no effect and can be | |
200 | * removed to avoid silly behaviour on the receiver side. The | |
201 | * other way around (ADD+DEL) can happen in case of roaming of | |
202 | * a client still in the NEW state. Roaming of NEW clients is | |
203 | * now possible due to automatically recognition of "temporary" | |
204 | * clients | |
205 | */ | |
acd34afa | 206 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
207 | if (!del_op_requested && del_op_entry) |
208 | goto del; | |
209 | if (del_op_requested && !del_op_entry) | |
210 | goto del; | |
211 | continue; | |
212 | del: | |
213 | list_del(&entry->list); | |
214 | kfree(entry); | |
155e4e12 | 215 | kfree(tt_change_node); |
3b643de5 AQ |
216 | event_removed = true; |
217 | goto unlock; | |
218 | } | |
219 | ||
a73105b8 | 220 | /* track the change in the OGMinterval list */ |
807736f6 | 221 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
222 | |
223 | unlock: | |
807736f6 | 224 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 225 | |
3b643de5 | 226 | if (event_removed) |
807736f6 | 227 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 228 | else |
807736f6 | 229 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
230 | } |
231 | ||
08c36d3e | 232 | int batadv_tt_len(int changes_num) |
a73105b8 | 233 | { |
96412690 | 234 | return changes_num * sizeof(struct batadv_tt_change); |
a73105b8 AQ |
235 | } |
236 | ||
56303d34 | 237 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 238 | { |
807736f6 | 239 | if (bat_priv->tt.local_hash) |
5346c35e | 240 | return 0; |
c6c8fea2 | 241 | |
807736f6 | 242 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 243 | |
807736f6 | 244 | if (!bat_priv->tt.local_hash) |
5346c35e | 245 | return -ENOMEM; |
c6c8fea2 | 246 | |
dec05074 AQ |
247 | batadv_hash_set_lock_class(bat_priv->tt.local_hash, |
248 | &batadv_tt_local_hash_lock_class_key); | |
249 | ||
5346c35e | 250 | return 0; |
c6c8fea2 SE |
251 | } |
252 | ||
068ee6e2 AQ |
253 | static void batadv_tt_global_free(struct batadv_priv *bat_priv, |
254 | struct batadv_tt_global_entry *tt_global, | |
255 | const char *message) | |
256 | { | |
257 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
258 | "Deleting global tt entry %pM: %s\n", | |
259 | tt_global->common.addr, message); | |
260 | ||
261 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, | |
262 | batadv_choose_orig, tt_global->common.addr); | |
263 | batadv_tt_global_entry_free_ref(tt_global); | |
068ee6e2 AQ |
264 | } |
265 | ||
08c36d3e SE |
266 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
267 | int ifindex) | |
c6c8fea2 | 268 | { |
56303d34 | 269 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
170173bf SE |
270 | struct batadv_tt_local_entry *tt_local; |
271 | struct batadv_tt_global_entry *tt_global; | |
db08e6e5 | 272 | struct hlist_head *head; |
56303d34 | 273 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 274 | int hash_added; |
068ee6e2 | 275 | bool roamed_back = false; |
c6c8fea2 | 276 | |
47c94655 | 277 | tt_local = batadv_tt_local_hash_find(bat_priv, addr); |
068ee6e2 | 278 | tt_global = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 279 | |
47c94655 AQ |
280 | if (tt_local) { |
281 | tt_local->last_seen = jiffies; | |
068ee6e2 AQ |
282 | if (tt_local->common.flags & BATADV_TT_CLIENT_PENDING) { |
283 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
284 | "Re-adding pending client %pM\n", addr); | |
285 | /* whatever the reason why the PENDING flag was set, | |
286 | * this is a client which was enqueued to be removed in | |
287 | * this orig_interval. Since it popped up again, the | |
288 | * flag can be reset like it was never enqueued | |
289 | */ | |
290 | tt_local->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
291 | goto add_event; | |
292 | } | |
293 | ||
294 | if (tt_local->common.flags & BATADV_TT_CLIENT_ROAM) { | |
295 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
296 | "Roaming client %pM came back to its original location\n", | |
297 | addr); | |
298 | /* the ROAM flag is set because this client roamed away | |
299 | * and the node got a roaming_advertisement message. Now | |
300 | * that the client popped up again at its original | |
301 | * location such flag can be unset | |
302 | */ | |
303 | tt_local->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
304 | roamed_back = true; | |
305 | } | |
306 | goto check_roaming; | |
c6c8fea2 SE |
307 | } |
308 | ||
47c94655 AQ |
309 | tt_local = kmalloc(sizeof(*tt_local), GFP_ATOMIC); |
310 | if (!tt_local) | |
7683fdc1 | 311 | goto out; |
a73105b8 | 312 | |
39c75a51 | 313 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 314 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
807736f6 | 315 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 316 | |
47c94655 | 317 | memcpy(tt_local->common.addr, addr, ETH_ALEN); |
8425ec6a AQ |
318 | /* The local entry has to be marked as NEW to avoid to send it in |
319 | * a full table response going out before the next ttvn increment | |
320 | * (consistency check) | |
321 | */ | |
322 | tt_local->common.flags = BATADV_TT_CLIENT_NEW; | |
9563877e | 323 | if (batadv_is_wifi_iface(ifindex)) |
47c94655 AQ |
324 | tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; |
325 | atomic_set(&tt_local->common.refcount, 2); | |
326 | tt_local->last_seen = jiffies; | |
327 | tt_local->common.added_at = tt_local->last_seen; | |
c6c8fea2 SE |
328 | |
329 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 330 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
47c94655 | 331 | tt_local->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 332 | |
807736f6 | 333 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
47c94655 AQ |
334 | batadv_choose_orig, &tt_local->common, |
335 | &tt_local->common.hash_entry); | |
80b3f58c SW |
336 | |
337 | if (unlikely(hash_added != 0)) { | |
338 | /* remove the reference for the hash */ | |
47c94655 | 339 | batadv_tt_local_entry_free_ref(tt_local); |
80b3f58c SW |
340 | goto out; |
341 | } | |
342 | ||
068ee6e2 | 343 | add_event: |
3abe4adb | 344 | batadv_tt_local_event(bat_priv, tt_local, BATADV_NO_FLAGS); |
ff66c975 | 345 | |
068ee6e2 AQ |
346 | check_roaming: |
347 | /* Check whether it is a roaming, but don't do anything if the roaming | |
348 | * process has already been handled | |
349 | */ | |
350 | if (tt_global && !(tt_global->common.flags & BATADV_TT_CLIENT_ROAM)) { | |
db08e6e5 | 351 | /* These node are probably going to update their tt table */ |
47c94655 | 352 | head = &tt_global->orig_list; |
db08e6e5 | 353 | rcu_read_lock(); |
b67bfe0d | 354 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
47c94655 | 355 | batadv_send_roam_adv(bat_priv, tt_global->common.addr, |
a513088d | 356 | orig_entry->orig_node); |
db08e6e5 SW |
357 | } |
358 | rcu_read_unlock(); | |
068ee6e2 AQ |
359 | if (roamed_back) { |
360 | batadv_tt_global_free(bat_priv, tt_global, | |
361 | "Roaming canceled"); | |
362 | tt_global = NULL; | |
363 | } else { | |
364 | /* The global entry has to be marked as ROAMING and | |
365 | * has to be kept for consistency purpose | |
366 | */ | |
367 | tt_global->common.flags |= BATADV_TT_CLIENT_ROAM; | |
368 | tt_global->roam_at = jiffies; | |
369 | } | |
7683fdc1 | 370 | } |
068ee6e2 | 371 | |
7683fdc1 | 372 | out: |
47c94655 AQ |
373 | if (tt_local) |
374 | batadv_tt_local_entry_free_ref(tt_local); | |
375 | if (tt_global) | |
376 | batadv_tt_global_entry_free_ref(tt_global); | |
c6c8fea2 SE |
377 | } |
378 | ||
a513088d SE |
379 | static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, |
380 | int *packet_buff_len, | |
381 | int min_packet_len, | |
382 | int new_packet_len) | |
be9aa4c1 ML |
383 | { |
384 | unsigned char *new_buff; | |
385 | ||
386 | new_buff = kmalloc(new_packet_len, GFP_ATOMIC); | |
387 | ||
388 | /* keep old buffer if kmalloc should fail */ | |
389 | if (new_buff) { | |
390 | memcpy(new_buff, *packet_buff, min_packet_len); | |
391 | kfree(*packet_buff); | |
392 | *packet_buff = new_buff; | |
393 | *packet_buff_len = new_packet_len; | |
394 | } | |
395 | } | |
396 | ||
56303d34 | 397 | static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv, |
a513088d SE |
398 | unsigned char **packet_buff, |
399 | int *packet_buff_len, | |
400 | int min_packet_len) | |
be9aa4c1 | 401 | { |
be9aa4c1 ML |
402 | int req_len; |
403 | ||
be9aa4c1 | 404 | req_len = min_packet_len; |
807736f6 | 405 | req_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
be9aa4c1 ML |
406 | |
407 | /* if we have too many changes for one packet don't send any | |
408 | * and wait for the tt table request which will be fragmented | |
409 | */ | |
736292c2 | 410 | if (req_len > bat_priv->soft_iface->mtu) |
be9aa4c1 ML |
411 | req_len = min_packet_len; |
412 | ||
a513088d SE |
413 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
414 | min_packet_len, req_len); | |
be9aa4c1 ML |
415 | } |
416 | ||
56303d34 | 417 | static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv, |
a513088d SE |
418 | unsigned char **packet_buff, |
419 | int *packet_buff_len, | |
420 | int min_packet_len) | |
c6c8fea2 | 421 | { |
56303d34 | 422 | struct batadv_tt_change_node *entry, *safe; |
be9aa4c1 ML |
423 | int count = 0, tot_changes = 0, new_len; |
424 | unsigned char *tt_buff; | |
425 | ||
a513088d SE |
426 | batadv_tt_prepare_packet_buff(bat_priv, packet_buff, |
427 | packet_buff_len, min_packet_len); | |
c6c8fea2 | 428 | |
be9aa4c1 ML |
429 | new_len = *packet_buff_len - min_packet_len; |
430 | tt_buff = *packet_buff + min_packet_len; | |
431 | ||
432 | if (new_len > 0) | |
08c36d3e | 433 | tot_changes = new_len / batadv_tt_len(1); |
c6c8fea2 | 434 | |
807736f6 SE |
435 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
436 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 437 | |
807736f6 | 438 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 439 | list) { |
a73105b8 | 440 | if (count < tot_changes) { |
08c36d3e | 441 | memcpy(tt_buff + batadv_tt_len(count), |
96412690 | 442 | &entry->change, sizeof(struct batadv_tt_change)); |
c6c8fea2 SE |
443 | count++; |
444 | } | |
a73105b8 AQ |
445 | list_del(&entry->list); |
446 | kfree(entry); | |
c6c8fea2 | 447 | } |
807736f6 | 448 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
449 | |
450 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
451 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
452 | kfree(bat_priv->tt.last_changeset); | |
453 | bat_priv->tt.last_changeset_len = 0; | |
454 | bat_priv->tt.last_changeset = NULL; | |
be9aa4c1 ML |
455 | /* check whether this new OGM has no changes due to size problems */ |
456 | if (new_len > 0) { | |
457 | /* if kmalloc() fails we will reply with the full table | |
a73105b8 AQ |
458 | * instead of providing the diff |
459 | */ | |
807736f6 SE |
460 | bat_priv->tt.last_changeset = kmalloc(new_len, GFP_ATOMIC); |
461 | if (bat_priv->tt.last_changeset) { | |
462 | memcpy(bat_priv->tt.last_changeset, tt_buff, new_len); | |
463 | bat_priv->tt.last_changeset_len = new_len; | |
a73105b8 AQ |
464 | } |
465 | } | |
807736f6 | 466 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 467 | |
08ad76ec | 468 | return count; |
c6c8fea2 SE |
469 | } |
470 | ||
08c36d3e | 471 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
472 | { |
473 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 474 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 475 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 476 | struct batadv_tt_common_entry *tt_common_entry; |
85766a82 | 477 | struct batadv_tt_local_entry *tt_local; |
56303d34 | 478 | struct batadv_hard_iface *primary_if; |
c6c8fea2 | 479 | struct hlist_head *head; |
c90681b8 | 480 | uint32_t i; |
85766a82 AQ |
481 | int last_seen_secs; |
482 | int last_seen_msecs; | |
483 | unsigned long last_seen_jiffies; | |
484 | bool no_purge; | |
485 | uint16_t np_flag = BATADV_TT_CLIENT_NOPURGE; | |
c6c8fea2 | 486 | |
30da63a6 ML |
487 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
488 | if (!primary_if) | |
32ae9b22 | 489 | goto out; |
c6c8fea2 | 490 | |
86ceb360 | 491 | seq_printf(seq, |
f9d8a537 AQ |
492 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u CRC: %#.4x):\n", |
493 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn), | |
494 | bat_priv->tt.local_crc); | |
85766a82 AQ |
495 | seq_printf(seq, " %-13s %-7s %-10s\n", "Client", "Flags", |
496 | "Last seen"); | |
c6c8fea2 | 497 | |
c6c8fea2 SE |
498 | for (i = 0; i < hash->size; i++) { |
499 | head = &hash->table[i]; | |
500 | ||
7aadf889 | 501 | rcu_read_lock(); |
b67bfe0d | 502 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 503 | head, hash_entry) { |
85766a82 AQ |
504 | tt_local = container_of(tt_common_entry, |
505 | struct batadv_tt_local_entry, | |
506 | common); | |
507 | last_seen_jiffies = jiffies - tt_local->last_seen; | |
508 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
509 | last_seen_secs = last_seen_msecs / 1000; | |
510 | last_seen_msecs = last_seen_msecs % 1000; | |
511 | ||
512 | no_purge = tt_common_entry->flags & np_flag; | |
513 | ||
514 | seq_printf(seq, " * %pM [%c%c%c%c%c] %3u.%03u\n", | |
7c64fd98 SE |
515 | tt_common_entry->addr, |
516 | (tt_common_entry->flags & | |
acd34afa | 517 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
85766a82 | 518 | no_purge ? 'P' : '.', |
7c64fd98 | 519 | (tt_common_entry->flags & |
acd34afa | 520 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 521 | (tt_common_entry->flags & |
acd34afa | 522 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 523 | (tt_common_entry->flags & |
85766a82 | 524 | BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
a7966d90 AQ |
525 | no_purge ? 0 : last_seen_secs, |
526 | no_purge ? 0 : last_seen_msecs); | |
c6c8fea2 | 527 | } |
7aadf889 | 528 | rcu_read_unlock(); |
c6c8fea2 | 529 | } |
32ae9b22 ML |
530 | out: |
531 | if (primary_if) | |
e5d89254 | 532 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 533 | return 0; |
c6c8fea2 SE |
534 | } |
535 | ||
56303d34 SE |
536 | static void |
537 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
538 | struct batadv_tt_local_entry *tt_local_entry, | |
539 | uint16_t flags, const char *message) | |
c6c8fea2 | 540 | { |
3abe4adb | 541 | batadv_tt_local_event(bat_priv, tt_local_entry, flags); |
a73105b8 | 542 | |
015758d0 AQ |
543 | /* The local client has to be marked as "pending to be removed" but has |
544 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
545 | * response issued before the net ttvn increment (consistency check) |
546 | */ | |
acd34afa | 547 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 548 | |
39c75a51 | 549 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
550 | "Local tt entry (%pM) pending to be removed: %s\n", |
551 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
552 | } |
553 | ||
7f91d06c AQ |
554 | /** |
555 | * batadv_tt_local_remove - logically remove an entry from the local table | |
556 | * @bat_priv: the bat priv with all the soft interface information | |
557 | * @addr: the MAC address of the client to remove | |
558 | * @message: message to append to the log on deletion | |
559 | * @roaming: true if the deletion is due to a roaming event | |
560 | * | |
561 | * Returns the flags assigned to the local entry before being deleted | |
562 | */ | |
563 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
564 | const uint8_t *addr, const char *message, | |
565 | bool roaming) | |
c6c8fea2 | 566 | { |
170173bf | 567 | struct batadv_tt_local_entry *tt_local_entry; |
7f91d06c | 568 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 569 | |
a513088d | 570 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
571 | if (!tt_local_entry) |
572 | goto out; | |
573 | ||
7f91d06c AQ |
574 | curr_flags = tt_local_entry->common.flags; |
575 | ||
acd34afa | 576 | flags = BATADV_TT_CLIENT_DEL; |
068ee6e2 AQ |
577 | /* if this global entry addition is due to a roaming, the node has to |
578 | * mark the local entry as "roamed" in order to correctly reroute | |
579 | * packets later | |
580 | */ | |
7c1fd91d | 581 | if (roaming) { |
acd34afa | 582 | flags |= BATADV_TT_CLIENT_ROAM; |
7c1fd91d AQ |
583 | /* mark the local client as ROAMed */ |
584 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_ROAM; | |
585 | } | |
42d0b044 | 586 | |
068ee6e2 AQ |
587 | if (!(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) { |
588 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, | |
589 | message); | |
590 | goto out; | |
591 | } | |
592 | /* if this client has been added right now, it is possible to | |
593 | * immediately purge it | |
594 | */ | |
3abe4adb | 595 | batadv_tt_local_event(bat_priv, tt_local_entry, BATADV_TT_CLIENT_DEL); |
068ee6e2 AQ |
596 | hlist_del_rcu(&tt_local_entry->common.hash_entry); |
597 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7f91d06c | 598 | |
7683fdc1 AQ |
599 | out: |
600 | if (tt_local_entry) | |
a513088d | 601 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
602 | |
603 | return curr_flags; | |
c6c8fea2 SE |
604 | } |
605 | ||
56303d34 | 606 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 607 | struct hlist_head *head) |
c6c8fea2 | 608 | { |
56303d34 SE |
609 | struct batadv_tt_local_entry *tt_local_entry; |
610 | struct batadv_tt_common_entry *tt_common_entry; | |
b67bfe0d | 611 | struct hlist_node *node_tmp; |
acd34afa | 612 | |
b67bfe0d | 613 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, head, |
acd34afa SE |
614 | hash_entry) { |
615 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
616 | struct batadv_tt_local_entry, |
617 | common); | |
acd34afa SE |
618 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
619 | continue; | |
620 | ||
621 | /* entry already marked for deletion */ | |
622 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
623 | continue; | |
624 | ||
625 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
626 | BATADV_TT_LOCAL_TIMEOUT)) | |
627 | continue; | |
628 | ||
629 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
630 | BATADV_TT_CLIENT_DEL, "timed out"); | |
631 | } | |
632 | } | |
633 | ||
56303d34 | 634 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 635 | { |
807736f6 | 636 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 637 | struct hlist_head *head; |
7683fdc1 | 638 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 639 | uint32_t i; |
c6c8fea2 | 640 | |
c6c8fea2 SE |
641 | for (i = 0; i < hash->size; i++) { |
642 | head = &hash->table[i]; | |
7683fdc1 | 643 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 644 | |
7683fdc1 | 645 | spin_lock_bh(list_lock); |
acd34afa | 646 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 647 | spin_unlock_bh(list_lock); |
c6c8fea2 | 648 | } |
c6c8fea2 SE |
649 | } |
650 | ||
56303d34 | 651 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 652 | { |
5bf74e9c | 653 | struct batadv_hashtable *hash; |
a73105b8 | 654 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
655 | struct batadv_tt_common_entry *tt_common_entry; |
656 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 657 | struct hlist_node *node_tmp; |
7683fdc1 | 658 | struct hlist_head *head; |
c90681b8 | 659 | uint32_t i; |
a73105b8 | 660 | |
807736f6 | 661 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
662 | return; |
663 | ||
807736f6 | 664 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
665 | |
666 | for (i = 0; i < hash->size; i++) { | |
667 | head = &hash->table[i]; | |
668 | list_lock = &hash->list_locks[i]; | |
669 | ||
670 | spin_lock_bh(list_lock); | |
b67bfe0d | 671 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
a73105b8 | 672 | head, hash_entry) { |
b67bfe0d | 673 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
674 | tt_local = container_of(tt_common_entry, |
675 | struct batadv_tt_local_entry, | |
676 | common); | |
677 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
678 | } |
679 | spin_unlock_bh(list_lock); | |
680 | } | |
681 | ||
1a8eaf07 | 682 | batadv_hash_destroy(hash); |
a73105b8 | 683 | |
807736f6 | 684 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
685 | } |
686 | ||
56303d34 | 687 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 688 | { |
807736f6 | 689 | if (bat_priv->tt.global_hash) |
5346c35e | 690 | return 0; |
c6c8fea2 | 691 | |
807736f6 | 692 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 693 | |
807736f6 | 694 | if (!bat_priv->tt.global_hash) |
5346c35e | 695 | return -ENOMEM; |
c6c8fea2 | 696 | |
dec05074 AQ |
697 | batadv_hash_set_lock_class(bat_priv->tt.global_hash, |
698 | &batadv_tt_global_hash_lock_class_key); | |
699 | ||
5346c35e | 700 | return 0; |
c6c8fea2 SE |
701 | } |
702 | ||
56303d34 | 703 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 704 | { |
56303d34 | 705 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 706 | |
807736f6 | 707 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 708 | |
807736f6 | 709 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
710 | list) { |
711 | list_del(&entry->list); | |
712 | kfree(entry); | |
713 | } | |
c6c8fea2 | 714 | |
807736f6 SE |
715 | atomic_set(&bat_priv->tt.local_changes, 0); |
716 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 717 | } |
c6c8fea2 | 718 | |
d657e621 AQ |
719 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
720 | * batadv_tt_global_entry list | |
721 | * | |
722 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 723 | */ |
d657e621 AQ |
724 | static struct batadv_tt_orig_list_entry * |
725 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
726 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 727 | { |
d657e621 | 728 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 | 729 | const struct hlist_head *head; |
db08e6e5 SW |
730 | |
731 | rcu_read_lock(); | |
732 | head = &entry->orig_list; | |
b67bfe0d | 733 | hlist_for_each_entry_rcu(tmp_orig_entry, head, list) { |
d657e621 AQ |
734 | if (tmp_orig_entry->orig_node != orig_node) |
735 | continue; | |
736 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
737 | continue; | |
738 | ||
739 | orig_entry = tmp_orig_entry; | |
740 | break; | |
db08e6e5 SW |
741 | } |
742 | rcu_read_unlock(); | |
d657e621 AQ |
743 | |
744 | return orig_entry; | |
745 | } | |
746 | ||
747 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
748 | * returns true if found, false otherwise | |
749 | */ | |
750 | static bool | |
751 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
752 | const struct batadv_orig_node *orig_node) | |
753 | { | |
754 | struct batadv_tt_orig_list_entry *orig_entry; | |
755 | bool found = false; | |
756 | ||
757 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
758 | if (orig_entry) { | |
759 | found = true; | |
760 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
761 | } | |
762 | ||
db08e6e5 SW |
763 | return found; |
764 | } | |
765 | ||
a513088d | 766 | static void |
d657e621 | 767 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 768 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 769 | { |
56303d34 | 770 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 771 | |
d657e621 | 772 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
773 | if (orig_entry) { |
774 | /* refresh the ttvn: the current value could be a bogus one that | |
775 | * was added during a "temporary client detection" | |
776 | */ | |
777 | orig_entry->ttvn = ttvn; | |
d657e621 | 778 | goto out; |
30cfd02b | 779 | } |
d657e621 | 780 | |
db08e6e5 SW |
781 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
782 | if (!orig_entry) | |
d657e621 | 783 | goto out; |
db08e6e5 SW |
784 | |
785 | INIT_HLIST_NODE(&orig_entry->list); | |
786 | atomic_inc(&orig_node->refcount); | |
787 | atomic_inc(&orig_node->tt_size); | |
788 | orig_entry->orig_node = orig_node; | |
789 | orig_entry->ttvn = ttvn; | |
d657e621 | 790 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 791 | |
d657e621 | 792 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 793 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
794 | &tt_global->orig_list); |
795 | spin_unlock_bh(&tt_global->list_lock); | |
796 | out: | |
797 | if (orig_entry) | |
798 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
799 | } |
800 | ||
d4ff40f6 AQ |
801 | /** |
802 | * batadv_tt_global_add - add a new TT global entry or update an existing one | |
803 | * @bat_priv: the bat priv with all the soft interface information | |
804 | * @orig_node: the originator announcing the client | |
805 | * @tt_addr: the mac address of the non-mesh client | |
806 | * @flags: TT flags that have to be set for this non-mesh client | |
807 | * @ttvn: the tt version number ever announcing this non-mesh client | |
808 | * | |
809 | * Add a new TT global entry for the given originator. If the entry already | |
810 | * exists add a new reference to the given originator (a global entry can have | |
811 | * references to multiple originators) and adjust the flags attribute to reflect | |
812 | * the function argument. | |
813 | * If a TT local entry exists for this non-mesh client remove it. | |
814 | * | |
815 | * The caller must hold orig_node refcount. | |
816 | */ | |
56303d34 SE |
817 | int batadv_tt_global_add(struct batadv_priv *bat_priv, |
818 | struct batadv_orig_node *orig_node, | |
d4ff40f6 | 819 | const unsigned char *tt_addr, uint16_t flags, |
d4f44692 | 820 | uint8_t ttvn) |
a73105b8 | 821 | { |
170173bf SE |
822 | struct batadv_tt_global_entry *tt_global_entry; |
823 | struct batadv_tt_local_entry *tt_local_entry; | |
7683fdc1 | 824 | int ret = 0; |
80b3f58c | 825 | int hash_added; |
56303d34 | 826 | struct batadv_tt_common_entry *common; |
7f91d06c | 827 | uint16_t local_flags; |
c6c8fea2 | 828 | |
a513088d | 829 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
068ee6e2 AQ |
830 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, tt_addr); |
831 | ||
832 | /* if the node already has a local client for this entry, it has to wait | |
833 | * for a roaming advertisement instead of manually messing up the global | |
834 | * table | |
835 | */ | |
836 | if ((flags & BATADV_TT_CLIENT_TEMP) && tt_local_entry && | |
837 | !(tt_local_entry->common.flags & BATADV_TT_CLIENT_NEW)) | |
838 | goto out; | |
a73105b8 AQ |
839 | |
840 | if (!tt_global_entry) { | |
d4f44692 | 841 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 842 | if (!tt_global_entry) |
7683fdc1 AQ |
843 | goto out; |
844 | ||
c0a55929 SE |
845 | common = &tt_global_entry->common; |
846 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 847 | |
d4f44692 | 848 | common->flags = flags; |
cc47f66e | 849 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
850 | /* node must store current time in case of roaming. This is |
851 | * needed to purge this entry out on timeout (if nobody claims | |
852 | * it) | |
853 | */ | |
854 | if (flags & BATADV_TT_CLIENT_ROAM) | |
855 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 856 | atomic_set(&common->refcount, 2); |
30cfd02b | 857 | common->added_at = jiffies; |
db08e6e5 SW |
858 | |
859 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
860 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 861 | |
807736f6 | 862 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d SE |
863 | batadv_compare_tt, |
864 | batadv_choose_orig, common, | |
865 | &common->hash_entry); | |
80b3f58c SW |
866 | |
867 | if (unlikely(hash_added != 0)) { | |
868 | /* remove the reference for the hash */ | |
a513088d | 869 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
870 | goto out_remove; |
871 | } | |
a73105b8 | 872 | } else { |
068ee6e2 | 873 | common = &tt_global_entry->common; |
30cfd02b AQ |
874 | /* If there is already a global entry, we can use this one for |
875 | * our processing. | |
068ee6e2 AQ |
876 | * But if we are trying to add a temporary client then here are |
877 | * two options at this point: | |
878 | * 1) the global client is not a temporary client: the global | |
879 | * client has to be left as it is, temporary information | |
880 | * should never override any already known client state | |
881 | * 2) the global client is a temporary client: purge the | |
882 | * originator list and add the new one orig_entry | |
30cfd02b | 883 | */ |
068ee6e2 AQ |
884 | if (flags & BATADV_TT_CLIENT_TEMP) { |
885 | if (!(common->flags & BATADV_TT_CLIENT_TEMP)) | |
886 | goto out; | |
887 | if (batadv_tt_global_entry_has_orig(tt_global_entry, | |
888 | orig_node)) | |
889 | goto out_remove; | |
890 | batadv_tt_global_del_orig_list(tt_global_entry); | |
891 | goto add_orig_entry; | |
892 | } | |
30cfd02b AQ |
893 | |
894 | /* if the client was temporary added before receiving the first | |
895 | * OGM announcing it, we have to clear the TEMP flag | |
896 | */ | |
068ee6e2 | 897 | common->flags &= ~BATADV_TT_CLIENT_TEMP; |
db08e6e5 | 898 | |
e9c00136 AQ |
899 | /* the change can carry possible "attribute" flags like the |
900 | * TT_CLIENT_WIFI, therefore they have to be copied in the | |
901 | * client entry | |
902 | */ | |
903 | tt_global_entry->common.flags |= flags; | |
904 | ||
acd34afa SE |
905 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
906 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
907 | * delete + roaming change for this originator. |
908 | * | |
909 | * We should first delete the old originator before adding the | |
910 | * new one. | |
911 | */ | |
068ee6e2 | 912 | if (common->flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 913 | batadv_tt_global_del_orig_list(tt_global_entry); |
068ee6e2 | 914 | common->flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 915 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
916 | } |
917 | } | |
068ee6e2 | 918 | add_orig_entry: |
30cfd02b | 919 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 920 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 921 | |
39c75a51 | 922 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 923 | "Creating new global tt entry: %pM (via %pM)\n", |
068ee6e2 | 924 | common->addr, orig_node->orig); |
c10dba05 | 925 | ret = 1; |
c6c8fea2 | 926 | |
80b3f58c | 927 | out_remove: |
7f91d06c | 928 | |
a73105b8 | 929 | /* remove address from local hash if present */ |
7f91d06c AQ |
930 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, |
931 | "global tt received", | |
c1d07431 | 932 | flags & BATADV_TT_CLIENT_ROAM); |
7f91d06c AQ |
933 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; |
934 | ||
068ee6e2 AQ |
935 | if (!(flags & BATADV_TT_CLIENT_ROAM)) |
936 | /* this is a normal global add. Therefore the client is not in a | |
937 | * roaming state anymore. | |
938 | */ | |
939 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; | |
940 | ||
7683fdc1 AQ |
941 | out: |
942 | if (tt_global_entry) | |
a513088d | 943 | batadv_tt_global_entry_free_ref(tt_global_entry); |
068ee6e2 AQ |
944 | if (tt_local_entry) |
945 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
7683fdc1 | 946 | return ret; |
c6c8fea2 SE |
947 | } |
948 | ||
981d8900 SE |
949 | /* batadv_transtable_best_orig - Get best originator list entry from tt entry |
950 | * @tt_global_entry: global translation table entry to be analyzed | |
951 | * | |
952 | * This functon assumes the caller holds rcu_read_lock(). | |
953 | * Returns best originator list entry or NULL on errors. | |
954 | */ | |
955 | static struct batadv_tt_orig_list_entry * | |
956 | batadv_transtable_best_orig(struct batadv_tt_global_entry *tt_global_entry) | |
957 | { | |
958 | struct batadv_neigh_node *router = NULL; | |
959 | struct hlist_head *head; | |
981d8900 SE |
960 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry = NULL; |
961 | int best_tq = 0; | |
962 | ||
963 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 964 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
965 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
966 | if (!router) | |
967 | continue; | |
968 | ||
969 | if (router->tq_avg > best_tq) { | |
970 | best_entry = orig_entry; | |
971 | best_tq = router->tq_avg; | |
972 | } | |
973 | ||
974 | batadv_neigh_node_free_ref(router); | |
975 | } | |
976 | ||
977 | return best_entry; | |
978 | } | |
979 | ||
980 | /* batadv_tt_global_print_entry - print all orig nodes who announce the address | |
981 | * for this global entry | |
982 | * @tt_global_entry: global translation table entry to be printed | |
983 | * @seq: debugfs table seq_file struct | |
984 | * | |
985 | * This functon assumes the caller holds rcu_read_lock(). | |
db08e6e5 | 986 | */ |
a513088d | 987 | static void |
56303d34 | 988 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 989 | struct seq_file *seq) |
db08e6e5 SW |
990 | { |
991 | struct hlist_head *head; | |
981d8900 | 992 | struct batadv_tt_orig_list_entry *orig_entry, *best_entry; |
56303d34 | 993 | struct batadv_tt_common_entry *tt_common_entry; |
db08e6e5 SW |
994 | uint16_t flags; |
995 | uint8_t last_ttvn; | |
996 | ||
997 | tt_common_entry = &tt_global_entry->common; | |
981d8900 SE |
998 | flags = tt_common_entry->flags; |
999 | ||
1000 | best_entry = batadv_transtable_best_orig(tt_global_entry); | |
1001 | if (best_entry) { | |
1002 | last_ttvn = atomic_read(&best_entry->orig_node->last_ttvn); | |
f9d8a537 AQ |
1003 | seq_printf(seq, |
1004 | " %c %pM (%3u) via %pM (%3u) (%#.4x) [%c%c%c]\n", | |
981d8900 SE |
1005 | '*', tt_global_entry->common.addr, |
1006 | best_entry->ttvn, best_entry->orig_node->orig, | |
f9d8a537 | 1007 | last_ttvn, best_entry->orig_node->tt_crc, |
981d8900 SE |
1008 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
1009 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), | |
1010 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
1011 | } | |
db08e6e5 SW |
1012 | |
1013 | head = &tt_global_entry->orig_list; | |
1014 | ||
b67bfe0d | 1015 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
981d8900 SE |
1016 | if (best_entry == orig_entry) |
1017 | continue; | |
1018 | ||
db08e6e5 | 1019 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); |
981d8900 SE |
1020 | seq_printf(seq, " %c %pM (%3u) via %pM (%3u) [%c%c%c]\n", |
1021 | '+', tt_global_entry->common.addr, | |
1022 | orig_entry->ttvn, orig_entry->orig_node->orig, | |
1023 | last_ttvn, | |
acd34afa | 1024 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
1025 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
1026 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
db08e6e5 SW |
1027 | } |
1028 | } | |
1029 | ||
08c36d3e | 1030 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
1031 | { |
1032 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1033 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1034 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1035 | struct batadv_tt_common_entry *tt_common_entry; |
1036 | struct batadv_tt_global_entry *tt_global; | |
1037 | struct batadv_hard_iface *primary_if; | |
c6c8fea2 | 1038 | struct hlist_head *head; |
c90681b8 | 1039 | uint32_t i; |
c6c8fea2 | 1040 | |
30da63a6 ML |
1041 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1042 | if (!primary_if) | |
32ae9b22 | 1043 | goto out; |
c6c8fea2 | 1044 | |
2dafb49d AQ |
1045 | seq_printf(seq, |
1046 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 1047 | net_dev->name); |
f9d8a537 AQ |
1048 | seq_printf(seq, " %-13s %s %-15s %s (%-6s) %s\n", |
1049 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "CRC", | |
1050 | "Flags"); | |
c6c8fea2 | 1051 | |
c6c8fea2 SE |
1052 | for (i = 0; i < hash->size; i++) { |
1053 | head = &hash->table[i]; | |
1054 | ||
7aadf889 | 1055 | rcu_read_lock(); |
b67bfe0d | 1056 | hlist_for_each_entry_rcu(tt_common_entry, |
7aadf889 | 1057 | head, hash_entry) { |
56303d34 SE |
1058 | tt_global = container_of(tt_common_entry, |
1059 | struct batadv_tt_global_entry, | |
1060 | common); | |
1061 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 1062 | } |
7aadf889 | 1063 | rcu_read_unlock(); |
c6c8fea2 | 1064 | } |
32ae9b22 ML |
1065 | out: |
1066 | if (primary_if) | |
e5d89254 | 1067 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 1068 | return 0; |
c6c8fea2 SE |
1069 | } |
1070 | ||
db08e6e5 | 1071 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 1072 | static void |
56303d34 | 1073 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 1074 | { |
db08e6e5 | 1075 | struct hlist_head *head; |
b67bfe0d | 1076 | struct hlist_node *safe; |
56303d34 | 1077 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 1078 | |
db08e6e5 SW |
1079 | spin_lock_bh(&tt_global_entry->list_lock); |
1080 | head = &tt_global_entry->orig_list; | |
b67bfe0d SL |
1081 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
1082 | hlist_del_rcu(&orig_entry->list); | |
a513088d | 1083 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1084 | } |
1085 | spin_unlock_bh(&tt_global_entry->list_lock); | |
db08e6e5 SW |
1086 | } |
1087 | ||
a513088d | 1088 | static void |
56303d34 SE |
1089 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
1090 | struct batadv_tt_global_entry *tt_global_entry, | |
1091 | struct batadv_orig_node *orig_node, | |
a513088d | 1092 | const char *message) |
db08e6e5 SW |
1093 | { |
1094 | struct hlist_head *head; | |
b67bfe0d | 1095 | struct hlist_node *safe; |
56303d34 | 1096 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1097 | |
1098 | spin_lock_bh(&tt_global_entry->list_lock); | |
1099 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1100 | hlist_for_each_entry_safe(orig_entry, safe, head, list) { |
db08e6e5 | 1101 | if (orig_entry->orig_node == orig_node) { |
39c75a51 | 1102 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1103 | "Deleting %pM from global tt entry %pM: %s\n", |
1104 | orig_node->orig, | |
1105 | tt_global_entry->common.addr, message); | |
b67bfe0d | 1106 | hlist_del_rcu(&orig_entry->list); |
a513088d | 1107 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
1108 | } |
1109 | } | |
1110 | spin_unlock_bh(&tt_global_entry->list_lock); | |
1111 | } | |
1112 | ||
db08e6e5 | 1113 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
1114 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
1115 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 1116 | */ |
a513088d | 1117 | static void |
56303d34 SE |
1118 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
1119 | struct batadv_tt_global_entry *tt_global_entry, | |
1120 | struct batadv_orig_node *orig_node, | |
1121 | const char *message) | |
db08e6e5 SW |
1122 | { |
1123 | bool last_entry = true; | |
1124 | struct hlist_head *head; | |
56303d34 | 1125 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
1126 | |
1127 | /* no local entry exists, case 1: | |
1128 | * Check if this is the last one or if other entries exist. | |
1129 | */ | |
1130 | ||
1131 | rcu_read_lock(); | |
1132 | head = &tt_global_entry->orig_list; | |
b67bfe0d | 1133 | hlist_for_each_entry_rcu(orig_entry, head, list) { |
db08e6e5 SW |
1134 | if (orig_entry->orig_node != orig_node) { |
1135 | last_entry = false; | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | rcu_read_unlock(); | |
1140 | ||
1141 | if (last_entry) { | |
1142 | /* its the last one, mark for roaming. */ | |
acd34afa | 1143 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
1144 | tt_global_entry->roam_at = jiffies; |
1145 | } else | |
1146 | /* there is another entry, we can simply delete this | |
1147 | * one and can still use the other one. | |
1148 | */ | |
a513088d SE |
1149 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1150 | orig_node, message); | |
db08e6e5 SW |
1151 | } |
1152 | ||
1153 | ||
1154 | ||
56303d34 SE |
1155 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
1156 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1157 | const unsigned char *addr, |
1158 | const char *message, bool roaming) | |
a73105b8 | 1159 | { |
170173bf | 1160 | struct batadv_tt_global_entry *tt_global_entry; |
56303d34 | 1161 | struct batadv_tt_local_entry *local_entry = NULL; |
a73105b8 | 1162 | |
a513088d | 1163 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 1164 | if (!tt_global_entry) |
7683fdc1 | 1165 | goto out; |
a73105b8 | 1166 | |
db08e6e5 | 1167 | if (!roaming) { |
a513088d SE |
1168 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1169 | orig_node, message); | |
db08e6e5 SW |
1170 | |
1171 | if (hlist_empty(&tt_global_entry->orig_list)) | |
be73b488 AQ |
1172 | batadv_tt_global_free(bat_priv, tt_global_entry, |
1173 | message); | |
db08e6e5 SW |
1174 | |
1175 | goto out; | |
1176 | } | |
92f90f56 SE |
1177 | |
1178 | /* if we are deleting a global entry due to a roam | |
1179 | * event, there are two possibilities: | |
db08e6e5 SW |
1180 | * 1) the client roamed from node A to node B => if there |
1181 | * is only one originator left for this client, we mark | |
acd34afa | 1182 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1183 | * wait for node B to claim it. In case of timeout |
1184 | * the entry is purged. | |
db08e6e5 SW |
1185 | * |
1186 | * If there are other originators left, we directly delete | |
1187 | * the originator. | |
92f90f56 | 1188 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1189 | * the global entry, since it is useless now. |
1190 | */ | |
a513088d SE |
1191 | local_entry = batadv_tt_local_hash_find(bat_priv, |
1192 | tt_global_entry->common.addr); | |
1193 | if (local_entry) { | |
db08e6e5 | 1194 | /* local entry exists, case 2: client roamed to us. */ |
a513088d | 1195 | batadv_tt_global_del_orig_list(tt_global_entry); |
be73b488 | 1196 | batadv_tt_global_free(bat_priv, tt_global_entry, message); |
db08e6e5 SW |
1197 | } else |
1198 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1199 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1200 | orig_node, message); | |
92f90f56 | 1201 | |
92f90f56 | 1202 | |
cc47f66e | 1203 | out: |
7683fdc1 | 1204 | if (tt_global_entry) |
a513088d SE |
1205 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1206 | if (local_entry) | |
1207 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1208 | } |
1209 | ||
56303d34 SE |
1210 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1211 | struct batadv_orig_node *orig_node, | |
1212 | const char *message) | |
c6c8fea2 | 1213 | { |
56303d34 SE |
1214 | struct batadv_tt_global_entry *tt_global; |
1215 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1216 | uint32_t i; |
807736f6 | 1217 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
b67bfe0d | 1218 | struct hlist_node *safe; |
a73105b8 | 1219 | struct hlist_head *head; |
7683fdc1 | 1220 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 1221 | |
6e801494 SW |
1222 | if (!hash) |
1223 | return; | |
1224 | ||
a73105b8 AQ |
1225 | for (i = 0; i < hash->size; i++) { |
1226 | head = &hash->table[i]; | |
7683fdc1 | 1227 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1228 | |
7683fdc1 | 1229 | spin_lock_bh(list_lock); |
b67bfe0d | 1230 | hlist_for_each_entry_safe(tt_common_entry, safe, |
7c64fd98 | 1231 | head, hash_entry) { |
56303d34 SE |
1232 | tt_global = container_of(tt_common_entry, |
1233 | struct batadv_tt_global_entry, | |
1234 | common); | |
db08e6e5 | 1235 | |
56303d34 | 1236 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1237 | orig_node, message); |
db08e6e5 | 1238 | |
56303d34 | 1239 | if (hlist_empty(&tt_global->orig_list)) { |
39c75a51 | 1240 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1241 | "Deleting global tt entry %pM: %s\n", |
56303d34 | 1242 | tt_global->common.addr, message); |
b67bfe0d | 1243 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 | 1244 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1245 | } |
a73105b8 | 1246 | } |
7683fdc1 | 1247 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1248 | } |
17071578 | 1249 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1250 | } |
1251 | ||
30cfd02b AQ |
1252 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1253 | char **msg) | |
cc47f66e | 1254 | { |
30cfd02b AQ |
1255 | bool purge = false; |
1256 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1257 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1258 | |
30cfd02b AQ |
1259 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1260 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1261 | purge = true; | |
1262 | *msg = "Roaming timeout\n"; | |
1263 | } | |
42d0b044 | 1264 | |
30cfd02b AQ |
1265 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1266 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1267 | purge = true; | |
1268 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1269 | } |
30cfd02b AQ |
1270 | |
1271 | return purge; | |
42d0b044 SE |
1272 | } |
1273 | ||
30cfd02b | 1274 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1275 | { |
807736f6 | 1276 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1277 | struct hlist_head *head; |
b67bfe0d | 1278 | struct hlist_node *node_tmp; |
7683fdc1 | 1279 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1280 | uint32_t i; |
30cfd02b AQ |
1281 | char *msg = NULL; |
1282 | struct batadv_tt_common_entry *tt_common; | |
1283 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1284 | |
cc47f66e AQ |
1285 | for (i = 0; i < hash->size; i++) { |
1286 | head = &hash->table[i]; | |
7683fdc1 | 1287 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1288 | |
7683fdc1 | 1289 | spin_lock_bh(list_lock); |
b67bfe0d | 1290 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
30cfd02b AQ |
1291 | hash_entry) { |
1292 | tt_global = container_of(tt_common, | |
1293 | struct batadv_tt_global_entry, | |
1294 | common); | |
1295 | ||
1296 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1297 | continue; | |
1298 | ||
1299 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
1300 | "Deleting global tt entry (%pM): %s\n", | |
1301 | tt_global->common.addr, msg); | |
1302 | ||
b67bfe0d | 1303 | hlist_del_rcu(&tt_common->hash_entry); |
30cfd02b AQ |
1304 | |
1305 | batadv_tt_global_entry_free_ref(tt_global); | |
1306 | } | |
7683fdc1 | 1307 | spin_unlock_bh(list_lock); |
cc47f66e | 1308 | } |
cc47f66e AQ |
1309 | } |
1310 | ||
56303d34 | 1311 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1312 | { |
5bf74e9c | 1313 | struct batadv_hashtable *hash; |
7683fdc1 | 1314 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1315 | struct batadv_tt_common_entry *tt_common_entry; |
1316 | struct batadv_tt_global_entry *tt_global; | |
b67bfe0d | 1317 | struct hlist_node *node_tmp; |
7683fdc1 | 1318 | struct hlist_head *head; |
c90681b8 | 1319 | uint32_t i; |
7683fdc1 | 1320 | |
807736f6 | 1321 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1322 | return; |
1323 | ||
807736f6 | 1324 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1325 | |
1326 | for (i = 0; i < hash->size; i++) { | |
1327 | head = &hash->table[i]; | |
1328 | list_lock = &hash->list_locks[i]; | |
1329 | ||
1330 | spin_lock_bh(list_lock); | |
b67bfe0d | 1331 | hlist_for_each_entry_safe(tt_common_entry, node_tmp, |
7683fdc1 | 1332 | head, hash_entry) { |
b67bfe0d | 1333 | hlist_del_rcu(&tt_common_entry->hash_entry); |
56303d34 SE |
1334 | tt_global = container_of(tt_common_entry, |
1335 | struct batadv_tt_global_entry, | |
1336 | common); | |
1337 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1338 | } |
1339 | spin_unlock_bh(list_lock); | |
1340 | } | |
1341 | ||
1a8eaf07 | 1342 | batadv_hash_destroy(hash); |
7683fdc1 | 1343 | |
807736f6 | 1344 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1345 | } |
1346 | ||
56303d34 SE |
1347 | static bool |
1348 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1349 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1350 | { |
1351 | bool ret = false; | |
1352 | ||
acd34afa SE |
1353 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1354 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1355 | ret = true; |
1356 | ||
1357 | return ret; | |
1358 | } | |
1359 | ||
56303d34 SE |
1360 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1361 | const uint8_t *src, | |
1362 | const uint8_t *addr) | |
c6c8fea2 | 1363 | { |
56303d34 SE |
1364 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1365 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1366 | struct batadv_orig_node *orig_node = NULL; | |
981d8900 | 1367 | struct batadv_tt_orig_list_entry *best_entry; |
c6c8fea2 | 1368 | |
3d393e47 | 1369 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1370 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
068ee6e2 AQ |
1371 | if (!tt_local_entry || |
1372 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING)) | |
3d393e47 AQ |
1373 | goto out; |
1374 | } | |
7aadf889 | 1375 | |
a513088d | 1376 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1377 | if (!tt_global_entry) |
7b36e8ee | 1378 | goto out; |
7aadf889 | 1379 | |
3d393e47 | 1380 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1381 | * isolation |
1382 | */ | |
a513088d SE |
1383 | if (tt_local_entry && |
1384 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1385 | goto out; |
1386 | ||
db08e6e5 | 1387 | rcu_read_lock(); |
981d8900 | 1388 | best_entry = batadv_transtable_best_orig(tt_global_entry); |
db08e6e5 | 1389 | /* found anything? */ |
981d8900 SE |
1390 | if (best_entry) |
1391 | orig_node = best_entry->orig_node; | |
db08e6e5 SW |
1392 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) |
1393 | orig_node = NULL; | |
1394 | rcu_read_unlock(); | |
981d8900 | 1395 | |
7b36e8ee | 1396 | out: |
3d393e47 | 1397 | if (tt_global_entry) |
a513088d | 1398 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1399 | if (tt_local_entry) |
a513088d | 1400 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1401 | |
7b36e8ee | 1402 | return orig_node; |
c6c8fea2 | 1403 | } |
a73105b8 AQ |
1404 | |
1405 | /* Calculates the checksum of the local table of a given orig_node */ | |
56303d34 SE |
1406 | static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, |
1407 | struct batadv_orig_node *orig_node) | |
a73105b8 AQ |
1408 | { |
1409 | uint16_t total = 0, total_one; | |
807736f6 | 1410 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1411 | struct batadv_tt_common_entry *tt_common; |
1412 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 | 1413 | struct hlist_head *head; |
c90681b8 AQ |
1414 | uint32_t i; |
1415 | int j; | |
a73105b8 AQ |
1416 | |
1417 | for (i = 0; i < hash->size; i++) { | |
1418 | head = &hash->table[i]; | |
1419 | ||
1420 | rcu_read_lock(); | |
b67bfe0d | 1421 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
56303d34 SE |
1422 | tt_global = container_of(tt_common, |
1423 | struct batadv_tt_global_entry, | |
1424 | common); | |
db08e6e5 SW |
1425 | /* Roaming clients are in the global table for |
1426 | * consistency only. They don't have to be | |
1427 | * taken into account while computing the | |
1428 | * global crc | |
1429 | */ | |
acd34afa | 1430 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1431 | continue; |
30cfd02b AQ |
1432 | /* Temporary clients have not been announced yet, so |
1433 | * they have to be skipped while computing the global | |
1434 | * crc | |
1435 | */ | |
1436 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1437 | continue; | |
db08e6e5 SW |
1438 | |
1439 | /* find out if this global entry is announced by this | |
1440 | * originator | |
1441 | */ | |
56303d34 | 1442 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1443 | orig_node)) |
db08e6e5 SW |
1444 | continue; |
1445 | ||
1446 | total_one = 0; | |
1447 | for (j = 0; j < ETH_ALEN; j++) | |
1448 | total_one = crc16_byte(total_one, | |
acd34afa | 1449 | tt_common->addr[j]); |
db08e6e5 | 1450 | total ^= total_one; |
a73105b8 AQ |
1451 | } |
1452 | rcu_read_unlock(); | |
1453 | } | |
1454 | ||
1455 | return total; | |
1456 | } | |
1457 | ||
1458 | /* Calculates the checksum of the local table */ | |
56303d34 | 1459 | static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv) |
a73105b8 AQ |
1460 | { |
1461 | uint16_t total = 0, total_one; | |
807736f6 | 1462 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1463 | struct batadv_tt_common_entry *tt_common; |
a73105b8 | 1464 | struct hlist_head *head; |
c90681b8 AQ |
1465 | uint32_t i; |
1466 | int j; | |
a73105b8 AQ |
1467 | |
1468 | for (i = 0; i < hash->size; i++) { | |
1469 | head = &hash->table[i]; | |
1470 | ||
1471 | rcu_read_lock(); | |
b67bfe0d | 1472 | hlist_for_each_entry_rcu(tt_common, head, hash_entry) { |
058d0e26 | 1473 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1474 | * account while computing the CRC |
1475 | */ | |
acd34afa | 1476 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1477 | continue; |
a73105b8 AQ |
1478 | total_one = 0; |
1479 | for (j = 0; j < ETH_ALEN; j++) | |
1480 | total_one = crc16_byte(total_one, | |
acd34afa | 1481 | tt_common->addr[j]); |
a73105b8 AQ |
1482 | total ^= total_one; |
1483 | } | |
a73105b8 AQ |
1484 | rcu_read_unlock(); |
1485 | } | |
1486 | ||
1487 | return total; | |
1488 | } | |
1489 | ||
56303d34 | 1490 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1491 | { |
56303d34 | 1492 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1493 | |
807736f6 | 1494 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1495 | |
807736f6 | 1496 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1497 | list_del(&node->list); |
1498 | kfree(node); | |
1499 | } | |
1500 | ||
807736f6 | 1501 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1502 | } |
1503 | ||
56303d34 SE |
1504 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1505 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1506 | const unsigned char *tt_buff, |
1507 | uint8_t tt_num_changes) | |
a73105b8 | 1508 | { |
08c36d3e | 1509 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
a73105b8 AQ |
1510 | |
1511 | /* Replace the old buffer only if I received something in the | |
9cfc7bd6 SE |
1512 | * last OGM (the OGM could carry no changes) |
1513 | */ | |
a73105b8 AQ |
1514 | spin_lock_bh(&orig_node->tt_buff_lock); |
1515 | if (tt_buff_len > 0) { | |
1516 | kfree(orig_node->tt_buff); | |
1517 | orig_node->tt_buff_len = 0; | |
1518 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1519 | if (orig_node->tt_buff) { | |
1520 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1521 | orig_node->tt_buff_len = tt_buff_len; | |
1522 | } | |
1523 | } | |
1524 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1525 | } | |
1526 | ||
56303d34 | 1527 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1528 | { |
56303d34 | 1529 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1530 | |
807736f6 SE |
1531 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1532 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1533 | if (batadv_has_timed_out(node->issued_at, |
1534 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1535 | list_del(&node->list); |
1536 | kfree(node); | |
1537 | } | |
1538 | } | |
807736f6 | 1539 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1540 | } |
1541 | ||
1542 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1543 | * has already been issued for this orig_node, NULL otherwise |
1544 | */ | |
56303d34 SE |
1545 | static struct batadv_tt_req_node * |
1546 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1547 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1548 | { |
56303d34 | 1549 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 1550 | |
807736f6 SE |
1551 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1552 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
1553 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1554 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1555 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1556 | goto unlock; |
1557 | } | |
1558 | ||
1559 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1560 | if (!tt_req_node) | |
1561 | goto unlock; | |
1562 | ||
1563 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1564 | tt_req_node->issued_at = jiffies; | |
1565 | ||
807736f6 | 1566 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 1567 | unlock: |
807736f6 | 1568 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1569 | return tt_req_node; |
1570 | } | |
1571 | ||
058d0e26 | 1572 | /* data_ptr is useless here, but has to be kept to respect the prototype */ |
a513088d SE |
1573 | static int batadv_tt_local_valid_entry(const void *entry_ptr, |
1574 | const void *data_ptr) | |
058d0e26 | 1575 | { |
56303d34 | 1576 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1577 | |
acd34afa | 1578 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1579 | return 0; |
1580 | return 1; | |
1581 | } | |
1582 | ||
a513088d SE |
1583 | static int batadv_tt_global_valid(const void *entry_ptr, |
1584 | const void *data_ptr) | |
a73105b8 | 1585 | { |
56303d34 SE |
1586 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1587 | const struct batadv_tt_global_entry *tt_global_entry; | |
1588 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1589 | |
30cfd02b AQ |
1590 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
1591 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
1592 | return 0; |
1593 | ||
56303d34 SE |
1594 | tt_global_entry = container_of(tt_common_entry, |
1595 | struct batadv_tt_global_entry, | |
48100bac AQ |
1596 | common); |
1597 | ||
a513088d | 1598 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1599 | } |
1600 | ||
a513088d SE |
1601 | static struct sk_buff * |
1602 | batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, | |
5bf74e9c | 1603 | struct batadv_hashtable *hash, |
736292c2 | 1604 | struct batadv_priv *bat_priv, |
a513088d SE |
1605 | int (*valid_cb)(const void *, const void *), |
1606 | void *cb_data) | |
a73105b8 | 1607 | { |
56303d34 | 1608 | struct batadv_tt_common_entry *tt_common_entry; |
96412690 SE |
1609 | struct batadv_tt_query_packet *tt_response; |
1610 | struct batadv_tt_change *tt_change; | |
a73105b8 AQ |
1611 | struct hlist_head *head; |
1612 | struct sk_buff *skb = NULL; | |
1613 | uint16_t tt_tot, tt_count; | |
96412690 | 1614 | ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet); |
c90681b8 | 1615 | uint32_t i; |
96412690 | 1616 | size_t len; |
a73105b8 | 1617 | |
736292c2 ML |
1618 | if (tt_query_size + tt_len > bat_priv->soft_iface->mtu) { |
1619 | tt_len = bat_priv->soft_iface->mtu - tt_query_size; | |
96412690 | 1620 | tt_len -= tt_len % sizeof(struct batadv_tt_change); |
a73105b8 | 1621 | } |
96412690 | 1622 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1623 | |
96412690 | 1624 | len = tt_query_size + tt_len; |
41ab6c48 | 1625 | skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN); |
a73105b8 AQ |
1626 | if (!skb) |
1627 | goto out; | |
1628 | ||
c54f38c9 | 1629 | skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 1630 | skb_reserve(skb, ETH_HLEN); |
96412690 | 1631 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len); |
a73105b8 | 1632 | tt_response->ttvn = ttvn; |
a73105b8 | 1633 | |
96412690 | 1634 | tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size); |
a73105b8 AQ |
1635 | tt_count = 0; |
1636 | ||
1637 | rcu_read_lock(); | |
1638 | for (i = 0; i < hash->size; i++) { | |
1639 | head = &hash->table[i]; | |
1640 | ||
b67bfe0d | 1641 | hlist_for_each_entry_rcu(tt_common_entry, |
a73105b8 AQ |
1642 | head, hash_entry) { |
1643 | if (tt_count == tt_tot) | |
1644 | break; | |
1645 | ||
48100bac | 1646 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1647 | continue; |
1648 | ||
48100bac AQ |
1649 | memcpy(tt_change->addr, tt_common_entry->addr, |
1650 | ETH_ALEN); | |
27b37ebf | 1651 | tt_change->flags = tt_common_entry->flags; |
a73105b8 AQ |
1652 | |
1653 | tt_count++; | |
1654 | tt_change++; | |
1655 | } | |
1656 | } | |
1657 | rcu_read_unlock(); | |
1658 | ||
9d852393 | 1659 | /* store in the message the number of entries we have successfully |
9cfc7bd6 SE |
1660 | * copied |
1661 | */ | |
9d852393 AQ |
1662 | tt_response->tt_data = htons(tt_count); |
1663 | ||
a73105b8 AQ |
1664 | out: |
1665 | return skb; | |
1666 | } | |
1667 | ||
56303d34 SE |
1668 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1669 | struct batadv_orig_node *dst_orig_node, | |
a513088d SE |
1670 | uint8_t ttvn, uint16_t tt_crc, |
1671 | bool full_table) | |
a73105b8 AQ |
1672 | { |
1673 | struct sk_buff *skb = NULL; | |
96412690 | 1674 | struct batadv_tt_query_packet *tt_request; |
56303d34 SE |
1675 | struct batadv_hard_iface *primary_if; |
1676 | struct batadv_tt_req_node *tt_req_node = NULL; | |
a73105b8 | 1677 | int ret = 1; |
96412690 | 1678 | size_t tt_req_len; |
a73105b8 | 1679 | |
e5d89254 | 1680 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1681 | if (!primary_if) |
1682 | goto out; | |
1683 | ||
1684 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1685 | * reply from the same orig_node yet |
1686 | */ | |
a513088d | 1687 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1688 | if (!tt_req_node) |
1689 | goto out; | |
1690 | ||
41ab6c48 | 1691 | skb = netdev_alloc_skb_ip_align(NULL, sizeof(*tt_request) + ETH_HLEN); |
a73105b8 AQ |
1692 | if (!skb) |
1693 | goto out; | |
1694 | ||
c54f38c9 | 1695 | skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 1696 | skb_reserve(skb, ETH_HLEN); |
a73105b8 | 1697 | |
96412690 SE |
1698 | tt_req_len = sizeof(*tt_request); |
1699 | tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len); | |
a73105b8 | 1700 | |
acd34afa | 1701 | tt_request->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1702 | tt_request->header.version = BATADV_COMPAT_VERSION; |
a73105b8 AQ |
1703 | memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1704 | memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); | |
42d0b044 | 1705 | tt_request->header.ttl = BATADV_TTL; |
a73105b8 | 1706 | tt_request->ttvn = ttvn; |
6d2003fc | 1707 | tt_request->tt_data = htons(tt_crc); |
acd34afa | 1708 | tt_request->flags = BATADV_TT_REQUEST; |
a73105b8 AQ |
1709 | |
1710 | if (full_table) | |
acd34afa | 1711 | tt_request->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1712 | |
bb351ba0 MH |
1713 | batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n", |
1714 | dst_orig_node->orig, (full_table ? 'F' : '.')); | |
a73105b8 | 1715 | |
d69909d2 | 1716 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
f8214865 | 1717 | |
e91ecfc6 | 1718 | if (batadv_send_skb_to_orig(skb, dst_orig_node, NULL) != NET_XMIT_DROP) |
bb351ba0 | 1719 | ret = 0; |
a73105b8 AQ |
1720 | |
1721 | out: | |
a73105b8 | 1722 | if (primary_if) |
e5d89254 | 1723 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1724 | if (ret) |
1725 | kfree_skb(skb); | |
1726 | if (ret && tt_req_node) { | |
807736f6 | 1727 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1728 | list_del(&tt_req_node->list); |
807736f6 | 1729 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1730 | kfree(tt_req_node); |
1731 | } | |
1732 | return ret; | |
1733 | } | |
1734 | ||
96412690 | 1735 | static bool |
56303d34 | 1736 | batadv_send_other_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1737 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1738 | { |
170173bf | 1739 | struct batadv_orig_node *req_dst_orig_node; |
56303d34 | 1740 | struct batadv_orig_node *res_dst_orig_node = NULL; |
a73105b8 | 1741 | uint8_t orig_ttvn, req_ttvn, ttvn; |
e91ecfc6 | 1742 | int res, ret = false; |
a73105b8 AQ |
1743 | unsigned char *tt_buff; |
1744 | bool full_table; | |
1745 | uint16_t tt_len, tt_tot; | |
1746 | struct sk_buff *skb = NULL; | |
96412690 | 1747 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1748 | uint8_t *packet_pos; |
96412690 | 1749 | size_t len; |
a73105b8 | 1750 | |
39c75a51 | 1751 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1752 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
1753 | tt_request->src, tt_request->ttvn, tt_request->dst, | |
acd34afa | 1754 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1755 | |
1756 | /* Let's get the orig node of the REAL destination */ | |
da641193 | 1757 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); |
a73105b8 AQ |
1758 | if (!req_dst_orig_node) |
1759 | goto out; | |
1760 | ||
da641193 | 1761 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1762 | if (!res_dst_orig_node) |
1763 | goto out; | |
1764 | ||
a73105b8 AQ |
1765 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
1766 | req_ttvn = tt_request->ttvn; | |
1767 | ||
015758d0 | 1768 | /* I don't have the requested data */ |
a73105b8 | 1769 | if (orig_ttvn != req_ttvn || |
f25bd58a | 1770 | tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1771 | goto out; |
1772 | ||
015758d0 | 1773 | /* If the full table has been explicitly requested */ |
acd34afa | 1774 | if (tt_request->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1775 | !req_dst_orig_node->tt_buff) |
1776 | full_table = true; | |
1777 | else | |
1778 | full_table = false; | |
1779 | ||
1780 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1781 | * I'll send only one packet with as much TT entries as I can |
1782 | */ | |
a73105b8 AQ |
1783 | if (!full_table) { |
1784 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1785 | tt_len = req_dst_orig_node->tt_buff_len; | |
96412690 | 1786 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1787 | |
96412690 | 1788 | len = sizeof(*tt_response) + tt_len; |
41ab6c48 | 1789 | skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN); |
a73105b8 AQ |
1790 | if (!skb) |
1791 | goto unlock; | |
1792 | ||
c54f38c9 | 1793 | skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 1794 | skb_reserve(skb, ETH_HLEN); |
c67893d1 SE |
1795 | packet_pos = skb_put(skb, len); |
1796 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1797 | tt_response->ttvn = req_ttvn; |
1798 | tt_response->tt_data = htons(tt_tot); | |
1799 | ||
96412690 | 1800 | tt_buff = skb->data + sizeof(*tt_response); |
a73105b8 AQ |
1801 | /* Copy the last orig_node's OGM buffer */ |
1802 | memcpy(tt_buff, req_dst_orig_node->tt_buff, | |
1803 | req_dst_orig_node->tt_buff_len); | |
1804 | ||
1805 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1806 | } else { | |
96412690 SE |
1807 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
1808 | tt_len *= sizeof(struct batadv_tt_change); | |
a73105b8 AQ |
1809 | ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
1810 | ||
a513088d | 1811 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1812 | bat_priv->tt.global_hash, |
736292c2 | 1813 | bat_priv, |
a513088d SE |
1814 | batadv_tt_global_valid, |
1815 | req_dst_orig_node); | |
a73105b8 AQ |
1816 | if (!skb) |
1817 | goto out; | |
1818 | ||
96412690 | 1819 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1820 | } |
1821 | ||
acd34afa | 1822 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1823 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1824 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1825 | memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); |
1826 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1827 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1828 | |
1829 | if (full_table) | |
acd34afa | 1830 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1831 | |
39c75a51 | 1832 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
1833 | "Sending TT_RESPONSE %pM for %pM (ttvn: %u)\n", |
1834 | res_dst_orig_node->orig, req_dst_orig_node->orig, req_ttvn); | |
a73105b8 | 1835 | |
d69909d2 | 1836 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1837 | |
e91ecfc6 MH |
1838 | res = batadv_send_skb_to_orig(skb, res_dst_orig_node, NULL); |
1839 | if (res != NET_XMIT_DROP) | |
bb351ba0 | 1840 | ret = true; |
e91ecfc6 | 1841 | |
a73105b8 AQ |
1842 | goto out; |
1843 | ||
1844 | unlock: | |
1845 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1846 | ||
1847 | out: | |
1848 | if (res_dst_orig_node) | |
7d211efc | 1849 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1850 | if (req_dst_orig_node) |
7d211efc | 1851 | batadv_orig_node_free_ref(req_dst_orig_node); |
a73105b8 AQ |
1852 | if (!ret) |
1853 | kfree_skb(skb); | |
1854 | return ret; | |
a73105b8 | 1855 | } |
96412690 SE |
1856 | |
1857 | static bool | |
56303d34 | 1858 | batadv_send_my_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1859 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1860 | { |
170173bf | 1861 | struct batadv_orig_node *orig_node; |
56303d34 | 1862 | struct batadv_hard_iface *primary_if = NULL; |
a73105b8 AQ |
1863 | uint8_t my_ttvn, req_ttvn, ttvn; |
1864 | int ret = false; | |
1865 | unsigned char *tt_buff; | |
1866 | bool full_table; | |
1867 | uint16_t tt_len, tt_tot; | |
1868 | struct sk_buff *skb = NULL; | |
96412690 | 1869 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1870 | uint8_t *packet_pos; |
96412690 | 1871 | size_t len; |
a73105b8 | 1872 | |
39c75a51 | 1873 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1874 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
1875 | tt_request->src, tt_request->ttvn, | |
acd34afa | 1876 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1877 | |
1878 | ||
807736f6 | 1879 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 AQ |
1880 | req_ttvn = tt_request->ttvn; |
1881 | ||
da641193 | 1882 | orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1883 | if (!orig_node) |
1884 | goto out; | |
1885 | ||
e5d89254 | 1886 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1887 | if (!primary_if) |
1888 | goto out; | |
1889 | ||
1890 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1891 | * is too big send the whole local translation table |
1892 | */ | |
acd34afa | 1893 | if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 1894 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
1895 | full_table = true; |
1896 | else | |
1897 | full_table = false; | |
1898 | ||
1899 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1900 | * I'll send only one packet with as much TT entries as I can |
1901 | */ | |
a73105b8 | 1902 | if (!full_table) { |
807736f6 SE |
1903 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1904 | tt_len = bat_priv->tt.last_changeset_len; | |
96412690 | 1905 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1906 | |
96412690 | 1907 | len = sizeof(*tt_response) + tt_len; |
41ab6c48 | 1908 | skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN); |
a73105b8 AQ |
1909 | if (!skb) |
1910 | goto unlock; | |
1911 | ||
c54f38c9 | 1912 | skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 1913 | skb_reserve(skb, ETH_HLEN); |
c67893d1 SE |
1914 | packet_pos = skb_put(skb, len); |
1915 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1916 | tt_response->ttvn = req_ttvn; |
1917 | tt_response->tt_data = htons(tt_tot); | |
1918 | ||
96412690 | 1919 | tt_buff = skb->data + sizeof(*tt_response); |
807736f6 SE |
1920 | memcpy(tt_buff, bat_priv->tt.last_changeset, |
1921 | bat_priv->tt.last_changeset_len); | |
1922 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 1923 | } else { |
807736f6 | 1924 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
96412690 | 1925 | tt_len *= sizeof(struct batadv_tt_change); |
807736f6 | 1926 | ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 | 1927 | |
a513088d | 1928 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1929 | bat_priv->tt.local_hash, |
736292c2 | 1930 | bat_priv, |
a513088d SE |
1931 | batadv_tt_local_valid_entry, |
1932 | NULL); | |
a73105b8 AQ |
1933 | if (!skb) |
1934 | goto out; | |
1935 | ||
96412690 | 1936 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1937 | } |
1938 | ||
acd34afa | 1939 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1940 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1941 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1942 | memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1943 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1944 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1945 | |
1946 | if (full_table) | |
acd34afa | 1947 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1948 | |
39c75a51 | 1949 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
1950 | "Sending TT_RESPONSE to %pM [%c]\n", |
1951 | orig_node->orig, | |
acd34afa | 1952 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1953 | |
d69909d2 | 1954 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1955 | |
e91ecfc6 | 1956 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) |
bb351ba0 | 1957 | ret = true; |
a73105b8 AQ |
1958 | goto out; |
1959 | ||
1960 | unlock: | |
807736f6 | 1961 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 AQ |
1962 | out: |
1963 | if (orig_node) | |
7d211efc | 1964 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1965 | if (primary_if) |
e5d89254 | 1966 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1967 | if (!ret) |
1968 | kfree_skb(skb); | |
1969 | /* This packet was for me, so it doesn't need to be re-routed */ | |
1970 | return true; | |
1971 | } | |
1972 | ||
56303d34 | 1973 | bool batadv_send_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1974 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1975 | { |
fe8a93b9 | 1976 | if (batadv_is_my_mac(bat_priv, tt_request->dst)) { |
20ff9d59 | 1977 | /* don't answer backbone gws! */ |
08adf151 | 1978 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) |
20ff9d59 SW |
1979 | return true; |
1980 | ||
a513088d | 1981 | return batadv_send_my_tt_response(bat_priv, tt_request); |
20ff9d59 | 1982 | } else { |
a513088d | 1983 | return batadv_send_other_tt_response(bat_priv, tt_request); |
20ff9d59 | 1984 | } |
a73105b8 AQ |
1985 | } |
1986 | ||
56303d34 SE |
1987 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1988 | struct batadv_orig_node *orig_node, | |
96412690 | 1989 | struct batadv_tt_change *tt_change, |
a513088d | 1990 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
1991 | { |
1992 | int i; | |
a513088d | 1993 | int roams; |
a73105b8 AQ |
1994 | |
1995 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
1996 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
1997 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
1998 | batadv_tt_global_del(bat_priv, orig_node, |
1999 | (tt_change + i)->addr, | |
d4f44692 AQ |
2000 | "tt removed by changes", |
2001 | roams); | |
08c36d3e | 2002 | } else { |
08c36d3e | 2003 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 AQ |
2004 | (tt_change + i)->addr, |
2005 | (tt_change + i)->flags, ttvn)) | |
a73105b8 AQ |
2006 | /* In case of problem while storing a |
2007 | * global_entry, we stop the updating | |
2008 | * procedure without committing the | |
2009 | * ttvn change. This will avoid to send | |
2010 | * corrupted data on tt_request | |
2011 | */ | |
2012 | return; | |
08c36d3e | 2013 | } |
a73105b8 | 2014 | } |
17071578 | 2015 | orig_node->tt_initialised = true; |
a73105b8 AQ |
2016 | } |
2017 | ||
56303d34 | 2018 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
96412690 | 2019 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 2020 | { |
170173bf | 2021 | struct batadv_orig_node *orig_node; |
a73105b8 | 2022 | |
da641193 | 2023 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
2024 | if (!orig_node) |
2025 | goto out; | |
2026 | ||
2027 | /* Purge the old table first.. */ | |
08c36d3e | 2028 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 2029 | |
a513088d | 2030 | _batadv_tt_update_changes(bat_priv, orig_node, |
96412690 | 2031 | (struct batadv_tt_change *)(tt_response + 1), |
a513088d SE |
2032 | ntohs(tt_response->tt_data), |
2033 | tt_response->ttvn); | |
a73105b8 AQ |
2034 | |
2035 | spin_lock_bh(&orig_node->tt_buff_lock); | |
2036 | kfree(orig_node->tt_buff); | |
2037 | orig_node->tt_buff_len = 0; | |
2038 | orig_node->tt_buff = NULL; | |
2039 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
2040 | ||
2041 | atomic_set(&orig_node->last_ttvn, tt_response->ttvn); | |
2042 | ||
2043 | out: | |
2044 | if (orig_node) | |
7d211efc | 2045 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2046 | } |
2047 | ||
56303d34 SE |
2048 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
2049 | struct batadv_orig_node *orig_node, | |
a513088d | 2050 | uint16_t tt_num_changes, uint8_t ttvn, |
96412690 | 2051 | struct batadv_tt_change *tt_change) |
a73105b8 | 2052 | { |
a513088d SE |
2053 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
2054 | tt_num_changes, ttvn); | |
a73105b8 | 2055 | |
a513088d SE |
2056 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
2057 | (unsigned char *)tt_change, tt_num_changes); | |
a73105b8 AQ |
2058 | atomic_set(&orig_node->last_ttvn, ttvn); |
2059 | } | |
2060 | ||
56303d34 | 2061 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 2062 | { |
170173bf | 2063 | struct batadv_tt_local_entry *tt_local_entry; |
7683fdc1 | 2064 | bool ret = false; |
a73105b8 | 2065 | |
a513088d | 2066 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
2067 | if (!tt_local_entry) |
2068 | goto out; | |
058d0e26 | 2069 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
2070 | * consistency purpose) |
2071 | */ | |
7c1fd91d AQ |
2072 | if ((tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) || |
2073 | (tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM)) | |
058d0e26 | 2074 | goto out; |
7683fdc1 AQ |
2075 | ret = true; |
2076 | out: | |
a73105b8 | 2077 | if (tt_local_entry) |
a513088d | 2078 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 2079 | return ret; |
a73105b8 AQ |
2080 | } |
2081 | ||
56303d34 | 2082 | void batadv_handle_tt_response(struct batadv_priv *bat_priv, |
96412690 | 2083 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 2084 | { |
56303d34 SE |
2085 | struct batadv_tt_req_node *node, *safe; |
2086 | struct batadv_orig_node *orig_node = NULL; | |
96412690 | 2087 | struct batadv_tt_change *tt_change; |
a73105b8 | 2088 | |
39c75a51 | 2089 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2090 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
2091 | tt_response->src, tt_response->ttvn, | |
2092 | ntohs(tt_response->tt_data), | |
acd34afa | 2093 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 2094 | |
20ff9d59 | 2095 | /* we should have never asked a backbone gw */ |
08adf151 | 2096 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) |
20ff9d59 SW |
2097 | goto out; |
2098 | ||
da641193 | 2099 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
2100 | if (!orig_node) |
2101 | goto out; | |
2102 | ||
96412690 | 2103 | if (tt_response->flags & BATADV_TT_FULL_TABLE) { |
a513088d | 2104 | batadv_tt_fill_gtable(bat_priv, tt_response); |
96412690 SE |
2105 | } else { |
2106 | tt_change = (struct batadv_tt_change *)(tt_response + 1); | |
a513088d SE |
2107 | batadv_tt_update_changes(bat_priv, orig_node, |
2108 | ntohs(tt_response->tt_data), | |
96412690 SE |
2109 | tt_response->ttvn, tt_change); |
2110 | } | |
a73105b8 AQ |
2111 | |
2112 | /* Delete the tt_req_node from pending tt_requests list */ | |
807736f6 SE |
2113 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
2114 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
1eda58bf | 2115 | if (!batadv_compare_eth(node->addr, tt_response->src)) |
a73105b8 AQ |
2116 | continue; |
2117 | list_del(&node->list); | |
2118 | kfree(node); | |
2119 | } | |
807736f6 | 2120 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
2121 | |
2122 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 2123 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a73105b8 AQ |
2124 | out: |
2125 | if (orig_node) | |
7d211efc | 2126 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2127 | } |
2128 | ||
56303d34 | 2129 | int batadv_tt_init(struct batadv_priv *bat_priv) |
a73105b8 | 2130 | { |
5346c35e | 2131 | int ret; |
a73105b8 | 2132 | |
a513088d | 2133 | ret = batadv_tt_local_init(bat_priv); |
5346c35e SE |
2134 | if (ret < 0) |
2135 | return ret; | |
2136 | ||
a513088d | 2137 | ret = batadv_tt_global_init(bat_priv); |
5346c35e SE |
2138 | if (ret < 0) |
2139 | return ret; | |
a73105b8 | 2140 | |
72414442 AQ |
2141 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
2142 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
2143 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 AQ |
2144 | |
2145 | return 1; | |
2146 | } | |
2147 | ||
56303d34 | 2148 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2149 | { |
56303d34 | 2150 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2151 | |
807736f6 | 2152 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2153 | |
807736f6 | 2154 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2155 | list_del(&node->list); |
2156 | kfree(node); | |
2157 | } | |
2158 | ||
807736f6 | 2159 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2160 | } |
2161 | ||
56303d34 | 2162 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2163 | { |
56303d34 | 2164 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2165 | |
807736f6 SE |
2166 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2167 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2168 | if (!batadv_has_timed_out(node->first_time, |
2169 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2170 | continue; |
2171 | ||
2172 | list_del(&node->list); | |
2173 | kfree(node); | |
2174 | } | |
807736f6 | 2175 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2176 | } |
2177 | ||
2178 | /* This function checks whether the client already reached the | |
2179 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2180 | * will not be sent. | |
2181 | * | |
9cfc7bd6 SE |
2182 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2183 | */ | |
56303d34 | 2184 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2185 | uint8_t *client) |
cc47f66e | 2186 | { |
56303d34 | 2187 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2188 | bool ret = false; |
2189 | ||
807736f6 | 2190 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2191 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2192 | * reply from the same orig_node yet |
2193 | */ | |
807736f6 | 2194 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2195 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2196 | continue; |
2197 | ||
1eda58bf | 2198 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2199 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2200 | continue; |
2201 | ||
3e34819e | 2202 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2203 | /* Sorry, you roamed too many times! */ |
2204 | goto unlock; | |
2205 | ret = true; | |
2206 | break; | |
2207 | } | |
2208 | ||
2209 | if (!ret) { | |
2210 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2211 | if (!tt_roam_node) | |
2212 | goto unlock; | |
2213 | ||
2214 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2215 | atomic_set(&tt_roam_node->counter, |
2216 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2217 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2218 | ||
807736f6 | 2219 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2220 | ret = true; |
2221 | } | |
2222 | ||
2223 | unlock: | |
807736f6 | 2224 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2225 | return ret; |
2226 | } | |
2227 | ||
56303d34 SE |
2228 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
2229 | struct batadv_orig_node *orig_node) | |
cc47f66e | 2230 | { |
cc47f66e | 2231 | struct sk_buff *skb = NULL; |
96412690 | 2232 | struct batadv_roam_adv_packet *roam_adv_packet; |
cc47f66e | 2233 | int ret = 1; |
56303d34 | 2234 | struct batadv_hard_iface *primary_if; |
96412690 | 2235 | size_t len = sizeof(*roam_adv_packet); |
cc47f66e AQ |
2236 | |
2237 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2238 | * already roamed to us too many times |
2239 | */ | |
a513088d | 2240 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2241 | goto out; |
2242 | ||
41ab6c48 | 2243 | skb = netdev_alloc_skb_ip_align(NULL, len + ETH_HLEN); |
cc47f66e AQ |
2244 | if (!skb) |
2245 | goto out; | |
2246 | ||
c54f38c9 | 2247 | skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 2248 | skb_reserve(skb, ETH_HLEN); |
cc47f66e | 2249 | |
96412690 | 2250 | roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len); |
cc47f66e | 2251 | |
acd34afa | 2252 | roam_adv_packet->header.packet_type = BATADV_ROAM_ADV; |
7e071c79 | 2253 | roam_adv_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 2254 | roam_adv_packet->header.ttl = BATADV_TTL; |
162d549c | 2255 | roam_adv_packet->reserved = 0; |
e5d89254 | 2256 | primary_if = batadv_primary_if_get_selected(bat_priv); |
cc47f66e AQ |
2257 | if (!primary_if) |
2258 | goto out; | |
2259 | memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
e5d89254 | 2260 | batadv_hardif_free_ref(primary_if); |
cc47f66e AQ |
2261 | memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); |
2262 | memcpy(roam_adv_packet->client, client, ETH_ALEN); | |
2263 | ||
39c75a51 | 2264 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
bb351ba0 MH |
2265 | "Sending ROAMING_ADV to %pM (client %pM)\n", |
2266 | orig_node->orig, client); | |
cc47f66e | 2267 | |
d69909d2 | 2268 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2269 | |
e91ecfc6 | 2270 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) |
bb351ba0 | 2271 | ret = 0; |
cc47f66e AQ |
2272 | |
2273 | out: | |
bb351ba0 | 2274 | if (ret && skb) |
cc47f66e AQ |
2275 | kfree_skb(skb); |
2276 | return; | |
a73105b8 AQ |
2277 | } |
2278 | ||
a513088d | 2279 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2280 | { |
56303d34 | 2281 | struct delayed_work *delayed_work; |
807736f6 | 2282 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2283 | struct batadv_priv *bat_priv; |
2284 | ||
2285 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2286 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2287 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2288 | |
a513088d | 2289 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2290 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2291 | batadv_tt_req_purge(bat_priv); |
2292 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2293 | |
72414442 AQ |
2294 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, |
2295 | msecs_to_jiffies(BATADV_TT_WORK_PERIOD)); | |
a73105b8 | 2296 | } |
cc47f66e | 2297 | |
56303d34 | 2298 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2299 | { |
807736f6 | 2300 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2301 | |
a513088d SE |
2302 | batadv_tt_local_table_free(bat_priv); |
2303 | batadv_tt_global_table_free(bat_priv); | |
2304 | batadv_tt_req_list_free(bat_priv); | |
2305 | batadv_tt_changes_list_free(bat_priv); | |
2306 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2307 | |
807736f6 | 2308 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2309 | } |
058d0e26 | 2310 | |
697f2531 | 2311 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2312 | * in the given hash table and returns the number of modified entries |
2313 | */ | |
5bf74e9c SE |
2314 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2315 | uint16_t flags, bool enable) | |
058d0e26 | 2316 | { |
c90681b8 | 2317 | uint32_t i; |
697f2531 | 2318 | uint16_t changed_num = 0; |
058d0e26 | 2319 | struct hlist_head *head; |
56303d34 | 2320 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2321 | |
2322 | if (!hash) | |
697f2531 | 2323 | goto out; |
058d0e26 AQ |
2324 | |
2325 | for (i = 0; i < hash->size; i++) { | |
2326 | head = &hash->table[i]; | |
2327 | ||
2328 | rcu_read_lock(); | |
b67bfe0d | 2329 | hlist_for_each_entry_rcu(tt_common_entry, |
058d0e26 | 2330 | head, hash_entry) { |
697f2531 AQ |
2331 | if (enable) { |
2332 | if ((tt_common_entry->flags & flags) == flags) | |
2333 | continue; | |
2334 | tt_common_entry->flags |= flags; | |
2335 | } else { | |
2336 | if (!(tt_common_entry->flags & flags)) | |
2337 | continue; | |
2338 | tt_common_entry->flags &= ~flags; | |
2339 | } | |
2340 | changed_num++; | |
058d0e26 AQ |
2341 | } |
2342 | rcu_read_unlock(); | |
2343 | } | |
697f2531 AQ |
2344 | out: |
2345 | return changed_num; | |
058d0e26 AQ |
2346 | } |
2347 | ||
acd34afa | 2348 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2349 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2350 | { |
807736f6 | 2351 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2352 | struct batadv_tt_common_entry *tt_common; |
2353 | struct batadv_tt_local_entry *tt_local; | |
b67bfe0d | 2354 | struct hlist_node *node_tmp; |
058d0e26 AQ |
2355 | struct hlist_head *head; |
2356 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2357 | uint32_t i; |
058d0e26 AQ |
2358 | |
2359 | if (!hash) | |
2360 | return; | |
2361 | ||
2362 | for (i = 0; i < hash->size; i++) { | |
2363 | head = &hash->table[i]; | |
2364 | list_lock = &hash->list_locks[i]; | |
2365 | ||
2366 | spin_lock_bh(list_lock); | |
b67bfe0d | 2367 | hlist_for_each_entry_safe(tt_common, node_tmp, head, |
acd34afa SE |
2368 | hash_entry) { |
2369 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2370 | continue; |
2371 | ||
39c75a51 | 2372 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2373 | "Deleting local tt entry (%pM): pending\n", |
acd34afa | 2374 | tt_common->addr); |
058d0e26 | 2375 | |
807736f6 | 2376 | atomic_dec(&bat_priv->tt.local_entry_num); |
b67bfe0d | 2377 | hlist_del_rcu(&tt_common->hash_entry); |
56303d34 SE |
2378 | tt_local = container_of(tt_common, |
2379 | struct batadv_tt_local_entry, | |
2380 | common); | |
2381 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2382 | } |
2383 | spin_unlock_bh(list_lock); | |
2384 | } | |
058d0e26 AQ |
2385 | } |
2386 | ||
56303d34 | 2387 | static int batadv_tt_commit_changes(struct batadv_priv *bat_priv, |
a513088d SE |
2388 | unsigned char **packet_buff, |
2389 | int *packet_buff_len, int packet_min_len) | |
058d0e26 | 2390 | { |
be9aa4c1 ML |
2391 | uint16_t changed_num = 0; |
2392 | ||
807736f6 | 2393 | if (atomic_read(&bat_priv->tt.local_changes) < 1) |
be9aa4c1 ML |
2394 | return -ENOENT; |
2395 | ||
807736f6 | 2396 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
acd34afa | 2397 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2398 | |
2399 | /* all reset entries have to be counted as local entries */ | |
807736f6 | 2400 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
a513088d | 2401 | batadv_tt_local_purge_pending_clients(bat_priv); |
807736f6 | 2402 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2403 | |
2404 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2405 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2406 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2407 | "Local changes committed, updating to ttvn %u\n", |
807736f6 | 2408 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
be9aa4c1 ML |
2409 | |
2410 | /* reset the sending counter */ | |
807736f6 | 2411 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
be9aa4c1 | 2412 | |
a513088d SE |
2413 | return batadv_tt_changes_fill_buff(bat_priv, packet_buff, |
2414 | packet_buff_len, packet_min_len); | |
be9aa4c1 ML |
2415 | } |
2416 | ||
2417 | /* when calling this function (hard_iface == primary_if) has to be true */ | |
56303d34 | 2418 | int batadv_tt_append_diff(struct batadv_priv *bat_priv, |
be9aa4c1 ML |
2419 | unsigned char **packet_buff, int *packet_buff_len, |
2420 | int packet_min_len) | |
2421 | { | |
2422 | int tt_num_changes; | |
2423 | ||
2424 | /* if at least one change happened */ | |
a513088d SE |
2425 | tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, |
2426 | packet_buff_len, | |
2427 | packet_min_len); | |
be9aa4c1 ML |
2428 | |
2429 | /* if the changes have been sent often enough */ | |
2430 | if ((tt_num_changes < 0) && | |
807736f6 | 2431 | (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))) { |
a513088d SE |
2432 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
2433 | packet_min_len, packet_min_len); | |
be9aa4c1 ML |
2434 | tt_num_changes = 0; |
2435 | } | |
2436 | ||
2437 | return tt_num_changes; | |
058d0e26 | 2438 | } |
59b699cd | 2439 | |
56303d34 | 2440 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
08c36d3e | 2441 | uint8_t *dst) |
59b699cd | 2442 | { |
56303d34 SE |
2443 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2444 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2445 | bool ret = false; |
59b699cd AQ |
2446 | |
2447 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2448 | goto out; |
59b699cd | 2449 | |
a513088d | 2450 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2451 | if (!tt_local_entry) |
2452 | goto out; | |
2453 | ||
a513088d | 2454 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2455 | if (!tt_global_entry) |
2456 | goto out; | |
2457 | ||
1f129fef | 2458 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2459 | goto out; |
2460 | ||
5870adc6 | 2461 | ret = true; |
59b699cd AQ |
2462 | |
2463 | out: | |
2464 | if (tt_global_entry) | |
a513088d | 2465 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2466 | if (tt_local_entry) |
a513088d | 2467 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2468 | return ret; |
2469 | } | |
a943cac1 | 2470 | |
56303d34 SE |
2471 | void batadv_tt_update_orig(struct batadv_priv *bat_priv, |
2472 | struct batadv_orig_node *orig_node, | |
08c36d3e SE |
2473 | const unsigned char *tt_buff, uint8_t tt_num_changes, |
2474 | uint8_t ttvn, uint16_t tt_crc) | |
a943cac1 ML |
2475 | { |
2476 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2477 | bool full_table = true; | |
96412690 | 2478 | struct batadv_tt_change *tt_change; |
a943cac1 | 2479 | |
20ff9d59 | 2480 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2481 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2482 | return; |
2483 | ||
17071578 | 2484 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2485 | * increased by one -> we can apply the attached changes |
2486 | */ | |
17071578 AQ |
2487 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2488 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2489 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2490 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2491 | * times. | |
9cfc7bd6 SE |
2492 | * In this case send a tt request |
2493 | */ | |
a943cac1 ML |
2494 | if (!tt_num_changes) { |
2495 | full_table = false; | |
2496 | goto request_table; | |
2497 | } | |
2498 | ||
96412690 | 2499 | tt_change = (struct batadv_tt_change *)tt_buff; |
a513088d | 2500 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2501 | ttvn, tt_change); |
a943cac1 ML |
2502 | |
2503 | /* Even if we received the precomputed crc with the OGM, we | |
2504 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2505 | * in the global table |
2506 | */ | |
a513088d | 2507 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2508 | |
2509 | /* The ttvn alone is not enough to guarantee consistency | |
2510 | * because a single value could represent different states | |
2511 | * (due to the wrap around). Thus a node has to check whether | |
2512 | * the resulting table (after applying the changes) is still | |
2513 | * consistent or not. E.g. a node could disconnect while its | |
2514 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2515 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2516 | * inconsistency |
2517 | */ | |
a943cac1 ML |
2518 | if (orig_node->tt_crc != tt_crc) |
2519 | goto request_table; | |
a943cac1 ML |
2520 | } else { |
2521 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2522 | * in sync anymore -> request fresh tt data |
2523 | */ | |
17071578 AQ |
2524 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2525 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2526 | request_table: |
39c75a51 | 2527 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
39a32991 | 2528 | "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 |
2529 | orig_node->orig, ttvn, orig_ttvn, tt_crc, |
2530 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2531 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2532 | tt_crc, full_table); | |
a943cac1 ML |
2533 | return; |
2534 | } | |
2535 | } | |
2536 | } | |
3275e7cc AQ |
2537 | |
2538 | /* returns true whether we know that the client has moved from its old | |
2539 | * originator to another one. This entry is kept is still kept for consistency | |
2540 | * purposes | |
2541 | */ | |
56303d34 | 2542 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
08c36d3e | 2543 | uint8_t *addr) |
3275e7cc | 2544 | { |
56303d34 | 2545 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2546 | bool ret = false; |
2547 | ||
a513088d | 2548 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2549 | if (!tt_global_entry) |
2550 | goto out; | |
2551 | ||
c1d07431 | 2552 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 2553 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2554 | out: |
2555 | return ret; | |
2556 | } | |
30cfd02b | 2557 | |
7c1fd91d AQ |
2558 | /** |
2559 | * batadv_tt_local_client_is_roaming - tells whether the client is roaming | |
2560 | * @bat_priv: the bat priv with all the soft interface information | |
2561 | * @addr: the MAC address of the local client to query | |
2562 | * | |
2563 | * Returns true if the local client is known to be roaming (it is not served by | |
2564 | * this node anymore) or not. If yes, the client is still present in the table | |
2565 | * to keep the latter consistent with the node TTVN | |
2566 | */ | |
2567 | bool batadv_tt_local_client_is_roaming(struct batadv_priv *bat_priv, | |
2568 | uint8_t *addr) | |
2569 | { | |
2570 | struct batadv_tt_local_entry *tt_local_entry; | |
2571 | bool ret = false; | |
2572 | ||
2573 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); | |
2574 | if (!tt_local_entry) | |
2575 | goto out; | |
2576 | ||
2577 | ret = tt_local_entry->common.flags & BATADV_TT_CLIENT_ROAM; | |
2578 | batadv_tt_local_entry_free_ref(tt_local_entry); | |
2579 | out: | |
2580 | return ret; | |
7c1fd91d AQ |
2581 | } |
2582 | ||
30cfd02b AQ |
2583 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, |
2584 | struct batadv_orig_node *orig_node, | |
2585 | const unsigned char *addr) | |
2586 | { | |
2587 | bool ret = false; | |
2588 | ||
1f36aebc AQ |
2589 | /* if the originator is a backbone node (meaning it belongs to the same |
2590 | * LAN of this node) the temporary client must not be added because to | |
2591 | * reach such destination the node must use the LAN instead of the mesh | |
2592 | */ | |
2593 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) | |
2594 | goto out; | |
2595 | ||
30cfd02b AQ |
2596 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, |
2597 | BATADV_TT_CLIENT_TEMP, | |
2598 | atomic_read(&orig_node->last_ttvn))) | |
2599 | goto out; | |
2600 | ||
2601 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2602 | "Added temporary global client (addr: %pM orig: %pM)\n", | |
2603 | addr, orig_node->orig); | |
2604 | ret = true; | |
2605 | out: | |
2606 | return ret; | |
2607 | } |