Commit | Line | Data |
---|---|---|
9cfc7bd6 | 1 | /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 | 2 | * |
35c133a0 | 3 | * Marek Lindner, Simon Wunderlich, Antonio Quartulli |
c6c8fea2 SE |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | #include "translation-table.h" | |
22 | #include "soft-interface.h" | |
32ae9b22 | 23 | #include "hard-interface.h" |
a73105b8 | 24 | #include "send.h" |
c6c8fea2 SE |
25 | #include "hash.h" |
26 | #include "originator.h" | |
a73105b8 | 27 | #include "routing.h" |
20ff9d59 | 28 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 29 | |
a73105b8 AQ |
30 | #include <linux/crc16.h> |
31 | ||
56303d34 SE |
32 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
33 | struct batadv_orig_node *orig_node); | |
a513088d SE |
34 | static void batadv_tt_purge(struct work_struct *work); |
35 | static void | |
56303d34 | 36 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry); |
c6c8fea2 | 37 | |
7aadf889 | 38 | /* returns 1 if they are the same mac addr */ |
a513088d | 39 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 40 | { |
56303d34 | 41 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 42 | hash_entry); |
7aadf889 ML |
43 | |
44 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
45 | } | |
46 | ||
56303d34 | 47 | static void batadv_tt_start_timer(struct batadv_priv *bat_priv) |
c6c8fea2 | 48 | { |
a513088d | 49 | INIT_DELAYED_WORK(&bat_priv->tt_work, batadv_tt_purge); |
3193e8fd | 50 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt_work, |
a73105b8 | 51 | msecs_to_jiffies(5000)); |
c6c8fea2 SE |
52 | } |
53 | ||
56303d34 | 54 | static struct batadv_tt_common_entry * |
5bf74e9c | 55 | batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) |
7aadf889 | 56 | { |
7aadf889 ML |
57 | struct hlist_head *head; |
58 | struct hlist_node *node; | |
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(); | |
48100bac | 70 | hlist_for_each_entry_rcu(tt_common_entry, node, 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 | |
a513088d | 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 | |
a513088d | 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 | 111 | |
7aadf889 ML |
112 | } |
113 | ||
a513088d | 114 | static void |
56303d34 | 115 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 116 | { |
48100bac AQ |
117 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
118 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
119 | } |
120 | ||
a513088d | 121 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) |
531027fc | 122 | { |
56303d34 SE |
123 | struct batadv_tt_common_entry *tt_common_entry; |
124 | struct batadv_tt_global_entry *tt_global_entry; | |
531027fc | 125 | |
56303d34 SE |
126 | tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu); |
127 | tt_global_entry = container_of(tt_common_entry, | |
128 | struct batadv_tt_global_entry, common); | |
531027fc | 129 | |
531027fc SW |
130 | kfree(tt_global_entry); |
131 | } | |
132 | ||
a513088d | 133 | static void |
56303d34 | 134 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 135 | { |
db08e6e5 | 136 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 137 | batadv_tt_global_del_orig_list(tt_global_entry); |
48100bac | 138 | call_rcu(&tt_global_entry->common.rcu, |
a513088d | 139 | batadv_tt_global_entry_free_rcu); |
db08e6e5 SW |
140 | } |
141 | } | |
142 | ||
a513088d | 143 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 144 | { |
56303d34 | 145 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 146 | |
56303d34 | 147 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
7d211efc | 148 | batadv_orig_node_free_ref(orig_entry->orig_node); |
db08e6e5 SW |
149 | kfree(orig_entry); |
150 | } | |
151 | ||
a513088d | 152 | static void |
56303d34 | 153 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 154 | { |
29cb99de AQ |
155 | /* to avoid race conditions, immediately decrease the tt counter */ |
156 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 157 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
158 | } |
159 | ||
56303d34 | 160 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
a513088d | 161 | const uint8_t *addr, uint8_t flags) |
a73105b8 | 162 | { |
56303d34 | 163 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3b643de5 AQ |
164 | bool event_removed = false; |
165 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
166 | |
167 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
168 | ||
169 | if (!tt_change_node) | |
170 | return; | |
171 | ||
ff66c975 | 172 | tt_change_node->change.flags = flags; |
a73105b8 AQ |
173 | memcpy(tt_change_node->change.addr, addr, ETH_ALEN); |
174 | ||
acd34afa | 175 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
176 | |
177 | /* check for ADD+DEL or DEL+ADD events */ | |
a73105b8 | 178 | spin_lock_bh(&bat_priv->tt_changes_list_lock); |
3b643de5 AQ |
179 | list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list, |
180 | list) { | |
181 | if (!batadv_compare_eth(entry->change.addr, addr)) | |
182 | continue; | |
183 | ||
184 | /* DEL+ADD in the same orig interval have no effect and can be | |
185 | * removed to avoid silly behaviour on the receiver side. The | |
186 | * other way around (ADD+DEL) can happen in case of roaming of | |
187 | * a client still in the NEW state. Roaming of NEW clients is | |
188 | * now possible due to automatically recognition of "temporary" | |
189 | * clients | |
190 | */ | |
acd34afa | 191 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
192 | if (!del_op_requested && del_op_entry) |
193 | goto del; | |
194 | if (del_op_requested && !del_op_entry) | |
195 | goto del; | |
196 | continue; | |
197 | del: | |
198 | list_del(&entry->list); | |
199 | kfree(entry); | |
155e4e12 | 200 | kfree(tt_change_node); |
3b643de5 AQ |
201 | event_removed = true; |
202 | goto unlock; | |
203 | } | |
204 | ||
a73105b8 AQ |
205 | /* track the change in the OGMinterval list */ |
206 | list_add_tail(&tt_change_node->list, &bat_priv->tt_changes_list); | |
3b643de5 AQ |
207 | |
208 | unlock: | |
a73105b8 AQ |
209 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); |
210 | ||
3b643de5 AQ |
211 | if (event_removed) |
212 | atomic_dec(&bat_priv->tt_local_changes); | |
213 | else | |
214 | atomic_inc(&bat_priv->tt_local_changes); | |
a73105b8 AQ |
215 | } |
216 | ||
08c36d3e | 217 | int batadv_tt_len(int changes_num) |
a73105b8 | 218 | { |
96412690 | 219 | return changes_num * sizeof(struct batadv_tt_change); |
a73105b8 AQ |
220 | } |
221 | ||
56303d34 | 222 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 223 | { |
2dafb49d | 224 | if (bat_priv->tt_local_hash) |
5346c35e | 225 | return 0; |
c6c8fea2 | 226 | |
1a8eaf07 | 227 | bat_priv->tt_local_hash = batadv_hash_new(1024); |
c6c8fea2 | 228 | |
2dafb49d | 229 | if (!bat_priv->tt_local_hash) |
5346c35e | 230 | return -ENOMEM; |
c6c8fea2 | 231 | |
5346c35e | 232 | return 0; |
c6c8fea2 SE |
233 | } |
234 | ||
08c36d3e SE |
235 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
236 | int ifindex) | |
c6c8fea2 | 237 | { |
56303d34 SE |
238 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
239 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
240 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
db08e6e5 SW |
241 | struct hlist_head *head; |
242 | struct hlist_node *node; | |
56303d34 | 243 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 244 | int hash_added; |
c6c8fea2 | 245 | |
a513088d | 246 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
c6c8fea2 | 247 | |
2dafb49d AQ |
248 | if (tt_local_entry) { |
249 | tt_local_entry->last_seen = jiffies; | |
acd34afa SE |
250 | /* possibly unset the BATADV_TT_CLIENT_PENDING flag */ |
251 | tt_local_entry->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
7683fdc1 | 252 | goto out; |
c6c8fea2 SE |
253 | } |
254 | ||
704509b8 | 255 | tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC); |
2dafb49d | 256 | if (!tt_local_entry) |
7683fdc1 | 257 | goto out; |
a73105b8 | 258 | |
39c75a51 | 259 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
260 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
261 | (uint8_t)atomic_read(&bat_priv->ttvn)); | |
c6c8fea2 | 262 | |
48100bac | 263 | memcpy(tt_local_entry->common.addr, addr, ETH_ALEN); |
42d0b044 | 264 | tt_local_entry->common.flags = BATADV_NO_FLAGS; |
9563877e | 265 | if (batadv_is_wifi_iface(ifindex)) |
acd34afa | 266 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_WIFI; |
48100bac AQ |
267 | atomic_set(&tt_local_entry->common.refcount, 2); |
268 | tt_local_entry->last_seen = jiffies; | |
c6c8fea2 SE |
269 | |
270 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 271 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
acd34afa | 272 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 273 | |
c40ed2bf AQ |
274 | /* The local entry has to be marked as NEW to avoid to send it in |
275 | * a full table response going out before the next ttvn increment | |
9cfc7bd6 SE |
276 | * (consistency check) |
277 | */ | |
acd34afa | 278 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_NEW; |
c40ed2bf | 279 | |
a513088d | 280 | hash_added = batadv_hash_add(bat_priv->tt_local_hash, batadv_compare_tt, |
da641193 SE |
281 | batadv_choose_orig, |
282 | &tt_local_entry->common, | |
c0a55929 | 283 | &tt_local_entry->common.hash_entry); |
80b3f58c SW |
284 | |
285 | if (unlikely(hash_added != 0)) { | |
286 | /* remove the reference for the hash */ | |
a513088d | 287 | batadv_tt_local_entry_free_ref(tt_local_entry); |
80b3f58c SW |
288 | goto out; |
289 | } | |
290 | ||
a513088d | 291 | batadv_tt_local_event(bat_priv, addr, tt_local_entry->common.flags); |
ff66c975 | 292 | |
c6c8fea2 | 293 | /* remove address from global hash if present */ |
a513088d | 294 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 295 | |
cc47f66e AQ |
296 | /* Check whether it is a roaming! */ |
297 | if (tt_global_entry) { | |
db08e6e5 SW |
298 | /* These node are probably going to update their tt table */ |
299 | head = &tt_global_entry->orig_list; | |
300 | rcu_read_lock(); | |
301 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
302 | orig_entry->orig_node->tt_poss_change = true; | |
303 | ||
a513088d SE |
304 | batadv_send_roam_adv(bat_priv, |
305 | tt_global_entry->common.addr, | |
306 | orig_entry->orig_node); | |
db08e6e5 SW |
307 | } |
308 | rcu_read_unlock(); | |
309 | /* The global entry has to be marked as ROAMING and | |
310 | * has to be kept for consistency purpose | |
311 | */ | |
acd34afa | 312 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
03fc3070 | 313 | tt_global_entry->roam_at = jiffies; |
7683fdc1 AQ |
314 | } |
315 | out: | |
316 | if (tt_local_entry) | |
a513088d | 317 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 318 | if (tt_global_entry) |
a513088d | 319 | batadv_tt_global_entry_free_ref(tt_global_entry); |
c6c8fea2 SE |
320 | } |
321 | ||
a513088d SE |
322 | static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, |
323 | int *packet_buff_len, | |
324 | int min_packet_len, | |
325 | int new_packet_len) | |
be9aa4c1 ML |
326 | { |
327 | unsigned char *new_buff; | |
328 | ||
329 | new_buff = kmalloc(new_packet_len, GFP_ATOMIC); | |
330 | ||
331 | /* keep old buffer if kmalloc should fail */ | |
332 | if (new_buff) { | |
333 | memcpy(new_buff, *packet_buff, min_packet_len); | |
334 | kfree(*packet_buff); | |
335 | *packet_buff = new_buff; | |
336 | *packet_buff_len = new_packet_len; | |
337 | } | |
338 | } | |
339 | ||
56303d34 | 340 | static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv, |
a513088d SE |
341 | unsigned char **packet_buff, |
342 | int *packet_buff_len, | |
343 | int min_packet_len) | |
be9aa4c1 | 344 | { |
56303d34 | 345 | struct batadv_hard_iface *primary_if; |
be9aa4c1 ML |
346 | int req_len; |
347 | ||
e5d89254 | 348 | primary_if = batadv_primary_if_get_selected(bat_priv); |
be9aa4c1 ML |
349 | |
350 | req_len = min_packet_len; | |
08c36d3e | 351 | req_len += batadv_tt_len(atomic_read(&bat_priv->tt_local_changes)); |
be9aa4c1 ML |
352 | |
353 | /* if we have too many changes for one packet don't send any | |
354 | * and wait for the tt table request which will be fragmented | |
355 | */ | |
356 | if ((!primary_if) || (req_len > primary_if->soft_iface->mtu)) | |
357 | req_len = min_packet_len; | |
358 | ||
a513088d SE |
359 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
360 | min_packet_len, req_len); | |
be9aa4c1 ML |
361 | |
362 | if (primary_if) | |
e5d89254 | 363 | batadv_hardif_free_ref(primary_if); |
be9aa4c1 ML |
364 | } |
365 | ||
56303d34 | 366 | static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv, |
a513088d SE |
367 | unsigned char **packet_buff, |
368 | int *packet_buff_len, | |
369 | int min_packet_len) | |
c6c8fea2 | 370 | { |
56303d34 | 371 | struct batadv_tt_change_node *entry, *safe; |
be9aa4c1 ML |
372 | int count = 0, tot_changes = 0, new_len; |
373 | unsigned char *tt_buff; | |
374 | ||
a513088d SE |
375 | batadv_tt_prepare_packet_buff(bat_priv, packet_buff, |
376 | packet_buff_len, min_packet_len); | |
c6c8fea2 | 377 | |
be9aa4c1 ML |
378 | new_len = *packet_buff_len - min_packet_len; |
379 | tt_buff = *packet_buff + min_packet_len; | |
380 | ||
381 | if (new_len > 0) | |
08c36d3e | 382 | tot_changes = new_len / batadv_tt_len(1); |
c6c8fea2 | 383 | |
a73105b8 AQ |
384 | spin_lock_bh(&bat_priv->tt_changes_list_lock); |
385 | atomic_set(&bat_priv->tt_local_changes, 0); | |
c6c8fea2 | 386 | |
a73105b8 | 387 | list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list, |
7c64fd98 | 388 | list) { |
a73105b8 | 389 | if (count < tot_changes) { |
08c36d3e | 390 | memcpy(tt_buff + batadv_tt_len(count), |
96412690 | 391 | &entry->change, sizeof(struct batadv_tt_change)); |
c6c8fea2 SE |
392 | count++; |
393 | } | |
a73105b8 AQ |
394 | list_del(&entry->list); |
395 | kfree(entry); | |
c6c8fea2 | 396 | } |
a73105b8 AQ |
397 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); |
398 | ||
399 | /* Keep the buffer for possible tt_request */ | |
400 | spin_lock_bh(&bat_priv->tt_buff_lock); | |
401 | kfree(bat_priv->tt_buff); | |
402 | bat_priv->tt_buff_len = 0; | |
403 | bat_priv->tt_buff = NULL; | |
be9aa4c1 ML |
404 | /* check whether this new OGM has no changes due to size problems */ |
405 | if (new_len > 0) { | |
406 | /* if kmalloc() fails we will reply with the full table | |
a73105b8 AQ |
407 | * instead of providing the diff |
408 | */ | |
be9aa4c1 | 409 | bat_priv->tt_buff = kmalloc(new_len, GFP_ATOMIC); |
a73105b8 | 410 | if (bat_priv->tt_buff) { |
be9aa4c1 ML |
411 | memcpy(bat_priv->tt_buff, tt_buff, new_len); |
412 | bat_priv->tt_buff_len = new_len; | |
a73105b8 AQ |
413 | } |
414 | } | |
415 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
c6c8fea2 | 416 | |
08ad76ec | 417 | return count; |
c6c8fea2 SE |
418 | } |
419 | ||
08c36d3e | 420 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
421 | { |
422 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 423 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
5bf74e9c | 424 | struct batadv_hashtable *hash = bat_priv->tt_local_hash; |
56303d34 SE |
425 | struct batadv_tt_common_entry *tt_common_entry; |
426 | struct batadv_hard_iface *primary_if; | |
7aadf889 | 427 | struct hlist_node *node; |
c6c8fea2 | 428 | struct hlist_head *head; |
c90681b8 AQ |
429 | uint32_t i; |
430 | int ret = 0; | |
32ae9b22 | 431 | |
e5d89254 | 432 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 433 | if (!primary_if) { |
86ceb360 SE |
434 | ret = seq_printf(seq, |
435 | "BATMAN mesh %s disabled - please specify interfaces to enable it\n", | |
32ae9b22 ML |
436 | net_dev->name); |
437 | goto out; | |
438 | } | |
c6c8fea2 | 439 | |
e9a4f295 | 440 | if (primary_if->if_status != BATADV_IF_ACTIVE) { |
86ceb360 SE |
441 | ret = seq_printf(seq, |
442 | "BATMAN mesh %s disabled - primary interface not active\n", | |
32ae9b22 ML |
443 | net_dev->name); |
444 | goto out; | |
c6c8fea2 SE |
445 | } |
446 | ||
86ceb360 SE |
447 | seq_printf(seq, |
448 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", | |
a73105b8 | 449 | net_dev->name, (uint8_t)atomic_read(&bat_priv->ttvn)); |
c6c8fea2 | 450 | |
c6c8fea2 SE |
451 | for (i = 0; i < hash->size; i++) { |
452 | head = &hash->table[i]; | |
453 | ||
7aadf889 | 454 | rcu_read_lock(); |
48100bac | 455 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 456 | head, hash_entry) { |
d099c2c5 | 457 | seq_printf(seq, " * %pM [%c%c%c%c%c]\n", |
7c64fd98 SE |
458 | tt_common_entry->addr, |
459 | (tt_common_entry->flags & | |
acd34afa | 460 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
7c64fd98 | 461 | (tt_common_entry->flags & |
acd34afa | 462 | BATADV_TT_CLIENT_NOPURGE ? 'P' : '.'), |
7c64fd98 | 463 | (tt_common_entry->flags & |
acd34afa | 464 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 465 | (tt_common_entry->flags & |
acd34afa | 466 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 467 | (tt_common_entry->flags & |
acd34afa | 468 | BATADV_TT_CLIENT_WIFI ? 'W' : '.')); |
c6c8fea2 | 469 | } |
7aadf889 | 470 | rcu_read_unlock(); |
c6c8fea2 | 471 | } |
32ae9b22 ML |
472 | out: |
473 | if (primary_if) | |
e5d89254 | 474 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 475 | return ret; |
c6c8fea2 SE |
476 | } |
477 | ||
56303d34 SE |
478 | static void |
479 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
480 | struct batadv_tt_local_entry *tt_local_entry, | |
481 | uint16_t flags, const char *message) | |
c6c8fea2 | 482 | { |
a513088d SE |
483 | batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, |
484 | tt_local_entry->common.flags | flags); | |
a73105b8 | 485 | |
015758d0 AQ |
486 | /* The local client has to be marked as "pending to be removed" but has |
487 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
488 | * response issued before the net ttvn increment (consistency check) |
489 | */ | |
acd34afa | 490 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 491 | |
39c75a51 | 492 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
493 | "Local tt entry (%pM) pending to be removed: %s\n", |
494 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
495 | } |
496 | ||
56303d34 | 497 | void batadv_tt_local_remove(struct batadv_priv *bat_priv, const uint8_t *addr, |
08c36d3e | 498 | const char *message, bool roaming) |
c6c8fea2 | 499 | { |
56303d34 | 500 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
42d0b044 | 501 | uint16_t flags; |
c6c8fea2 | 502 | |
a513088d | 503 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
504 | if (!tt_local_entry) |
505 | goto out; | |
506 | ||
acd34afa | 507 | flags = BATADV_TT_CLIENT_DEL; |
42d0b044 | 508 | if (roaming) |
acd34afa | 509 | flags |= BATADV_TT_CLIENT_ROAM; |
42d0b044 SE |
510 | |
511 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, message); | |
7683fdc1 AQ |
512 | out: |
513 | if (tt_local_entry) | |
a513088d | 514 | batadv_tt_local_entry_free_ref(tt_local_entry); |
c6c8fea2 SE |
515 | } |
516 | ||
56303d34 | 517 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 518 | struct hlist_head *head) |
c6c8fea2 | 519 | { |
56303d34 SE |
520 | struct batadv_tt_local_entry *tt_local_entry; |
521 | struct batadv_tt_common_entry *tt_common_entry; | |
7aadf889 | 522 | struct hlist_node *node, *node_tmp; |
acd34afa SE |
523 | |
524 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, | |
525 | hash_entry) { | |
526 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
527 | struct batadv_tt_local_entry, |
528 | common); | |
acd34afa SE |
529 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
530 | continue; | |
531 | ||
532 | /* entry already marked for deletion */ | |
533 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
534 | continue; | |
535 | ||
536 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
537 | BATADV_TT_LOCAL_TIMEOUT)) | |
538 | continue; | |
539 | ||
540 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
541 | BATADV_TT_CLIENT_DEL, "timed out"); | |
542 | } | |
543 | } | |
544 | ||
56303d34 | 545 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 546 | { |
5bf74e9c | 547 | struct batadv_hashtable *hash = bat_priv->tt_local_hash; |
c6c8fea2 | 548 | struct hlist_head *head; |
7683fdc1 | 549 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 550 | uint32_t i; |
c6c8fea2 | 551 | |
c6c8fea2 SE |
552 | for (i = 0; i < hash->size; i++) { |
553 | head = &hash->table[i]; | |
7683fdc1 | 554 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 555 | |
7683fdc1 | 556 | spin_lock_bh(list_lock); |
acd34afa | 557 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 558 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
559 | } |
560 | ||
c6c8fea2 SE |
561 | } |
562 | ||
56303d34 | 563 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 564 | { |
5bf74e9c | 565 | struct batadv_hashtable *hash; |
a73105b8 | 566 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
567 | struct batadv_tt_common_entry *tt_common_entry; |
568 | struct batadv_tt_local_entry *tt_local; | |
7683fdc1 AQ |
569 | struct hlist_node *node, *node_tmp; |
570 | struct hlist_head *head; | |
c90681b8 | 571 | uint32_t i; |
a73105b8 | 572 | |
2dafb49d | 573 | if (!bat_priv->tt_local_hash) |
c6c8fea2 SE |
574 | return; |
575 | ||
a73105b8 AQ |
576 | hash = bat_priv->tt_local_hash; |
577 | ||
578 | for (i = 0; i < hash->size; i++) { | |
579 | head = &hash->table[i]; | |
580 | list_lock = &hash->list_locks[i]; | |
581 | ||
582 | spin_lock_bh(list_lock); | |
48100bac | 583 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
a73105b8 AQ |
584 | head, hash_entry) { |
585 | hlist_del_rcu(node); | |
56303d34 SE |
586 | tt_local = container_of(tt_common_entry, |
587 | struct batadv_tt_local_entry, | |
588 | common); | |
589 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
590 | } |
591 | spin_unlock_bh(list_lock); | |
592 | } | |
593 | ||
1a8eaf07 | 594 | batadv_hash_destroy(hash); |
a73105b8 | 595 | |
2dafb49d | 596 | bat_priv->tt_local_hash = NULL; |
c6c8fea2 SE |
597 | } |
598 | ||
56303d34 | 599 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 600 | { |
2dafb49d | 601 | if (bat_priv->tt_global_hash) |
5346c35e | 602 | return 0; |
c6c8fea2 | 603 | |
1a8eaf07 | 604 | bat_priv->tt_global_hash = batadv_hash_new(1024); |
c6c8fea2 | 605 | |
2dafb49d | 606 | if (!bat_priv->tt_global_hash) |
5346c35e | 607 | return -ENOMEM; |
c6c8fea2 | 608 | |
5346c35e | 609 | return 0; |
c6c8fea2 SE |
610 | } |
611 | ||
56303d34 | 612 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 613 | { |
56303d34 | 614 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 615 | |
a73105b8 | 616 | spin_lock_bh(&bat_priv->tt_changes_list_lock); |
c6c8fea2 | 617 | |
a73105b8 AQ |
618 | list_for_each_entry_safe(entry, safe, &bat_priv->tt_changes_list, |
619 | list) { | |
620 | list_del(&entry->list); | |
621 | kfree(entry); | |
622 | } | |
c6c8fea2 | 623 | |
a73105b8 AQ |
624 | atomic_set(&bat_priv->tt_local_changes, 0); |
625 | spin_unlock_bh(&bat_priv->tt_changes_list_lock); | |
626 | } | |
c6c8fea2 | 627 | |
db08e6e5 SW |
628 | /* find out if an orig_node is already in the list of a tt_global_entry. |
629 | * returns 1 if found, 0 otherwise | |
630 | */ | |
56303d34 SE |
631 | static bool |
632 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
633 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 634 | { |
56303d34 | 635 | struct batadv_tt_orig_list_entry *tmp_orig_entry; |
db08e6e5 SW |
636 | const struct hlist_head *head; |
637 | struct hlist_node *node; | |
638 | bool found = false; | |
639 | ||
640 | rcu_read_lock(); | |
641 | head = &entry->orig_list; | |
642 | hlist_for_each_entry_rcu(tmp_orig_entry, node, head, list) { | |
643 | if (tmp_orig_entry->orig_node == orig_node) { | |
644 | found = true; | |
645 | break; | |
646 | } | |
647 | } | |
648 | rcu_read_unlock(); | |
649 | return found; | |
650 | } | |
651 | ||
a513088d | 652 | static void |
56303d34 SE |
653 | batadv_tt_global_add_orig_entry(struct batadv_tt_global_entry *tt_global_entry, |
654 | struct batadv_orig_node *orig_node, int ttvn) | |
db08e6e5 | 655 | { |
56303d34 | 656 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
657 | |
658 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); | |
659 | if (!orig_entry) | |
660 | return; | |
661 | ||
662 | INIT_HLIST_NODE(&orig_entry->list); | |
663 | atomic_inc(&orig_node->refcount); | |
664 | atomic_inc(&orig_node->tt_size); | |
665 | orig_entry->orig_node = orig_node; | |
666 | orig_entry->ttvn = ttvn; | |
667 | ||
668 | spin_lock_bh(&tt_global_entry->list_lock); | |
669 | hlist_add_head_rcu(&orig_entry->list, | |
670 | &tt_global_entry->orig_list); | |
671 | spin_unlock_bh(&tt_global_entry->list_lock); | |
672 | } | |
673 | ||
a73105b8 | 674 | /* caller must hold orig_node refcount */ |
56303d34 SE |
675 | int batadv_tt_global_add(struct batadv_priv *bat_priv, |
676 | struct batadv_orig_node *orig_node, | |
d4f44692 AQ |
677 | const unsigned char *tt_addr, uint8_t flags, |
678 | uint8_t ttvn) | |
a73105b8 | 679 | { |
56303d34 | 680 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
7683fdc1 | 681 | int ret = 0; |
80b3f58c | 682 | int hash_added; |
56303d34 | 683 | struct batadv_tt_common_entry *common; |
c6c8fea2 | 684 | |
a513088d | 685 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
a73105b8 AQ |
686 | |
687 | if (!tt_global_entry) { | |
d4f44692 | 688 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 689 | if (!tt_global_entry) |
7683fdc1 AQ |
690 | goto out; |
691 | ||
c0a55929 SE |
692 | common = &tt_global_entry->common; |
693 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 694 | |
d4f44692 | 695 | common->flags = flags; |
cc47f66e | 696 | tt_global_entry->roam_at = 0; |
c0a55929 | 697 | atomic_set(&common->refcount, 2); |
db08e6e5 SW |
698 | |
699 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
700 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 701 | |
c0a55929 | 702 | hash_added = batadv_hash_add(bat_priv->tt_global_hash, |
a513088d SE |
703 | batadv_compare_tt, |
704 | batadv_choose_orig, common, | |
705 | &common->hash_entry); | |
80b3f58c SW |
706 | |
707 | if (unlikely(hash_added != 0)) { | |
708 | /* remove the reference for the hash */ | |
a513088d | 709 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
710 | goto out_remove; |
711 | } | |
db08e6e5 | 712 | |
a513088d SE |
713 | batadv_tt_global_add_orig_entry(tt_global_entry, orig_node, |
714 | ttvn); | |
a73105b8 | 715 | } else { |
db08e6e5 SW |
716 | /* there is already a global entry, use this one. */ |
717 | ||
acd34afa SE |
718 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
719 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
720 | * delete + roaming change for this originator. |
721 | * | |
722 | * We should first delete the old originator before adding the | |
723 | * new one. | |
724 | */ | |
acd34afa | 725 | if (tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 726 | batadv_tt_global_del_orig_list(tt_global_entry); |
acd34afa | 727 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 728 | tt_global_entry->roam_at = 0; |
a73105b8 | 729 | } |
db08e6e5 | 730 | |
a513088d SE |
731 | if (!batadv_tt_global_entry_has_orig(tt_global_entry, |
732 | orig_node)) | |
733 | batadv_tt_global_add_orig_entry(tt_global_entry, | |
734 | orig_node, ttvn); | |
a73105b8 | 735 | } |
c6c8fea2 | 736 | |
39c75a51 | 737 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
738 | "Creating new global tt entry: %pM (via %pM)\n", |
739 | tt_global_entry->common.addr, orig_node->orig); | |
c6c8fea2 | 740 | |
80b3f58c | 741 | out_remove: |
a73105b8 | 742 | /* remove address from local hash if present */ |
08c36d3e | 743 | batadv_tt_local_remove(bat_priv, tt_global_entry->common.addr, |
acd34afa SE |
744 | "global tt received", |
745 | flags & BATADV_TT_CLIENT_ROAM); | |
7683fdc1 AQ |
746 | ret = 1; |
747 | out: | |
748 | if (tt_global_entry) | |
a513088d | 749 | batadv_tt_global_entry_free_ref(tt_global_entry); |
7683fdc1 | 750 | return ret; |
c6c8fea2 SE |
751 | } |
752 | ||
db08e6e5 SW |
753 | /* print all orig nodes who announce the address for this global entry. |
754 | * it is assumed that the caller holds rcu_read_lock(); | |
755 | */ | |
a513088d | 756 | static void |
56303d34 | 757 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 758 | struct seq_file *seq) |
db08e6e5 SW |
759 | { |
760 | struct hlist_head *head; | |
761 | struct hlist_node *node; | |
56303d34 SE |
762 | struct batadv_tt_orig_list_entry *orig_entry; |
763 | struct batadv_tt_common_entry *tt_common_entry; | |
db08e6e5 SW |
764 | uint16_t flags; |
765 | uint8_t last_ttvn; | |
766 | ||
767 | tt_common_entry = &tt_global_entry->common; | |
768 | ||
769 | head = &tt_global_entry->orig_list; | |
770 | ||
771 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
772 | flags = tt_common_entry->flags; | |
773 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); | |
774 | seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c]\n", | |
775 | tt_global_entry->common.addr, orig_entry->ttvn, | |
776 | orig_entry->orig_node->orig, last_ttvn, | |
acd34afa SE |
777 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
778 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.')); | |
db08e6e5 SW |
779 | } |
780 | } | |
781 | ||
08c36d3e | 782 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
783 | { |
784 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 785 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
5bf74e9c | 786 | struct batadv_hashtable *hash = bat_priv->tt_global_hash; |
56303d34 SE |
787 | struct batadv_tt_common_entry *tt_common_entry; |
788 | struct batadv_tt_global_entry *tt_global; | |
789 | struct batadv_hard_iface *primary_if; | |
7aadf889 | 790 | struct hlist_node *node; |
c6c8fea2 | 791 | struct hlist_head *head; |
c90681b8 AQ |
792 | uint32_t i; |
793 | int ret = 0; | |
32ae9b22 | 794 | |
e5d89254 | 795 | primary_if = batadv_primary_if_get_selected(bat_priv); |
32ae9b22 | 796 | if (!primary_if) { |
86ceb360 SE |
797 | ret = seq_printf(seq, |
798 | "BATMAN mesh %s disabled - please specify interfaces to enable it\n", | |
32ae9b22 ML |
799 | net_dev->name); |
800 | goto out; | |
801 | } | |
c6c8fea2 | 802 | |
e9a4f295 | 803 | if (primary_if->if_status != BATADV_IF_ACTIVE) { |
86ceb360 SE |
804 | ret = seq_printf(seq, |
805 | "BATMAN mesh %s disabled - primary interface not active\n", | |
32ae9b22 ML |
806 | net_dev->name); |
807 | goto out; | |
c6c8fea2 SE |
808 | } |
809 | ||
2dafb49d AQ |
810 | seq_printf(seq, |
811 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 812 | net_dev->name); |
df6edb9e AQ |
813 | seq_printf(seq, " %-13s %s %-15s %s %s\n", |
814 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags"); | |
c6c8fea2 | 815 | |
c6c8fea2 SE |
816 | for (i = 0; i < hash->size; i++) { |
817 | head = &hash->table[i]; | |
818 | ||
7aadf889 | 819 | rcu_read_lock(); |
48100bac | 820 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 821 | head, hash_entry) { |
56303d34 SE |
822 | tt_global = container_of(tt_common_entry, |
823 | struct batadv_tt_global_entry, | |
824 | common); | |
825 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 826 | } |
7aadf889 | 827 | rcu_read_unlock(); |
c6c8fea2 | 828 | } |
32ae9b22 ML |
829 | out: |
830 | if (primary_if) | |
e5d89254 | 831 | batadv_hardif_free_ref(primary_if); |
32ae9b22 | 832 | return ret; |
c6c8fea2 SE |
833 | } |
834 | ||
db08e6e5 | 835 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 836 | static void |
56303d34 | 837 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 838 | { |
db08e6e5 SW |
839 | struct hlist_head *head; |
840 | struct hlist_node *node, *safe; | |
56303d34 | 841 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 842 | |
db08e6e5 SW |
843 | spin_lock_bh(&tt_global_entry->list_lock); |
844 | head = &tt_global_entry->orig_list; | |
845 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
846 | hlist_del_rcu(node); | |
a513088d | 847 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
848 | } |
849 | spin_unlock_bh(&tt_global_entry->list_lock); | |
c6c8fea2 | 850 | |
db08e6e5 SW |
851 | } |
852 | ||
a513088d | 853 | static void |
56303d34 SE |
854 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
855 | struct batadv_tt_global_entry *tt_global_entry, | |
856 | struct batadv_orig_node *orig_node, | |
a513088d | 857 | const char *message) |
db08e6e5 SW |
858 | { |
859 | struct hlist_head *head; | |
860 | struct hlist_node *node, *safe; | |
56303d34 | 861 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
862 | |
863 | spin_lock_bh(&tt_global_entry->list_lock); | |
864 | head = &tt_global_entry->orig_list; | |
865 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
866 | if (orig_entry->orig_node == orig_node) { | |
39c75a51 | 867 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
868 | "Deleting %pM from global tt entry %pM: %s\n", |
869 | orig_node->orig, | |
870 | tt_global_entry->common.addr, message); | |
db08e6e5 | 871 | hlist_del_rcu(node); |
a513088d | 872 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
873 | } |
874 | } | |
875 | spin_unlock_bh(&tt_global_entry->list_lock); | |
876 | } | |
877 | ||
56303d34 SE |
878 | static void |
879 | batadv_tt_global_del_struct(struct batadv_priv *bat_priv, | |
880 | struct batadv_tt_global_entry *tt_global_entry, | |
881 | const char *message) | |
db08e6e5 | 882 | { |
39c75a51 SE |
883 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
884 | "Deleting global tt entry %pM: %s\n", | |
1eda58bf | 885 | tt_global_entry->common.addr, message); |
7683fdc1 | 886 | |
a513088d | 887 | batadv_hash_remove(bat_priv->tt_global_hash, batadv_compare_tt, |
da641193 | 888 | batadv_choose_orig, tt_global_entry->common.addr); |
a513088d | 889 | batadv_tt_global_entry_free_ref(tt_global_entry); |
db08e6e5 | 890 | |
c6c8fea2 SE |
891 | } |
892 | ||
db08e6e5 | 893 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
894 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
895 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 896 | */ |
a513088d | 897 | static void |
56303d34 SE |
898 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
899 | struct batadv_tt_global_entry *tt_global_entry, | |
900 | struct batadv_orig_node *orig_node, | |
901 | const char *message) | |
db08e6e5 SW |
902 | { |
903 | bool last_entry = true; | |
904 | struct hlist_head *head; | |
905 | struct hlist_node *node; | |
56303d34 | 906 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
907 | |
908 | /* no local entry exists, case 1: | |
909 | * Check if this is the last one or if other entries exist. | |
910 | */ | |
911 | ||
912 | rcu_read_lock(); | |
913 | head = &tt_global_entry->orig_list; | |
914 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
915 | if (orig_entry->orig_node != orig_node) { | |
916 | last_entry = false; | |
917 | break; | |
918 | } | |
919 | } | |
920 | rcu_read_unlock(); | |
921 | ||
922 | if (last_entry) { | |
923 | /* its the last one, mark for roaming. */ | |
acd34afa | 924 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
925 | tt_global_entry->roam_at = jiffies; |
926 | } else | |
927 | /* there is another entry, we can simply delete this | |
928 | * one and can still use the other one. | |
929 | */ | |
a513088d SE |
930 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
931 | orig_node, message); | |
db08e6e5 SW |
932 | } |
933 | ||
934 | ||
935 | ||
56303d34 SE |
936 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
937 | struct batadv_orig_node *orig_node, | |
a513088d SE |
938 | const unsigned char *addr, |
939 | const char *message, bool roaming) | |
a73105b8 | 940 | { |
56303d34 SE |
941 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
942 | struct batadv_tt_local_entry *local_entry = NULL; | |
a73105b8 | 943 | |
a513088d | 944 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 945 | if (!tt_global_entry) |
7683fdc1 | 946 | goto out; |
a73105b8 | 947 | |
db08e6e5 | 948 | if (!roaming) { |
a513088d SE |
949 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
950 | orig_node, message); | |
db08e6e5 SW |
951 | |
952 | if (hlist_empty(&tt_global_entry->orig_list)) | |
a513088d SE |
953 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, |
954 | message); | |
db08e6e5 SW |
955 | |
956 | goto out; | |
957 | } | |
92f90f56 SE |
958 | |
959 | /* if we are deleting a global entry due to a roam | |
960 | * event, there are two possibilities: | |
db08e6e5 SW |
961 | * 1) the client roamed from node A to node B => if there |
962 | * is only one originator left for this client, we mark | |
acd34afa | 963 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
964 | * wait for node B to claim it. In case of timeout |
965 | * the entry is purged. | |
db08e6e5 SW |
966 | * |
967 | * If there are other originators left, we directly delete | |
968 | * the originator. | |
92f90f56 | 969 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
970 | * the global entry, since it is useless now. |
971 | */ | |
a513088d SE |
972 | local_entry = batadv_tt_local_hash_find(bat_priv, |
973 | tt_global_entry->common.addr); | |
974 | if (local_entry) { | |
db08e6e5 | 975 | /* local entry exists, case 2: client roamed to us. */ |
a513088d SE |
976 | batadv_tt_global_del_orig_list(tt_global_entry); |
977 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, message); | |
db08e6e5 SW |
978 | } else |
979 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
980 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
981 | orig_node, message); | |
92f90f56 | 982 | |
92f90f56 | 983 | |
cc47f66e | 984 | out: |
7683fdc1 | 985 | if (tt_global_entry) |
a513088d SE |
986 | batadv_tt_global_entry_free_ref(tt_global_entry); |
987 | if (local_entry) | |
988 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
989 | } |
990 | ||
56303d34 SE |
991 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
992 | struct batadv_orig_node *orig_node, | |
993 | const char *message) | |
c6c8fea2 | 994 | { |
56303d34 SE |
995 | struct batadv_tt_global_entry *tt_global; |
996 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 997 | uint32_t i; |
5bf74e9c | 998 | struct batadv_hashtable *hash = bat_priv->tt_global_hash; |
a73105b8 AQ |
999 | struct hlist_node *node, *safe; |
1000 | struct hlist_head *head; | |
7683fdc1 | 1001 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 1002 | |
6e801494 SW |
1003 | if (!hash) |
1004 | return; | |
1005 | ||
a73105b8 AQ |
1006 | for (i = 0; i < hash->size; i++) { |
1007 | head = &hash->table[i]; | |
7683fdc1 | 1008 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1009 | |
7683fdc1 | 1010 | spin_lock_bh(list_lock); |
48100bac | 1011 | hlist_for_each_entry_safe(tt_common_entry, node, safe, |
7c64fd98 | 1012 | head, hash_entry) { |
56303d34 SE |
1013 | tt_global = container_of(tt_common_entry, |
1014 | struct batadv_tt_global_entry, | |
1015 | common); | |
db08e6e5 | 1016 | |
56303d34 | 1017 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1018 | orig_node, message); |
db08e6e5 | 1019 | |
56303d34 | 1020 | if (hlist_empty(&tt_global->orig_list)) { |
39c75a51 | 1021 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1022 | "Deleting global tt entry %pM: %s\n", |
56303d34 | 1023 | tt_global->common.addr, message); |
7683fdc1 | 1024 | hlist_del_rcu(node); |
56303d34 | 1025 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1026 | } |
a73105b8 | 1027 | } |
7683fdc1 | 1028 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1029 | } |
17071578 | 1030 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1031 | } |
1032 | ||
56303d34 | 1033 | static void batadv_tt_global_roam_purge_list(struct batadv_priv *bat_priv, |
42d0b044 | 1034 | struct hlist_head *head) |
cc47f66e | 1035 | { |
56303d34 SE |
1036 | struct batadv_tt_common_entry *tt_common_entry; |
1037 | struct batadv_tt_global_entry *tt_global_entry; | |
cc47f66e | 1038 | struct hlist_node *node, *node_tmp; |
42d0b044 SE |
1039 | |
1040 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, | |
1041 | hash_entry) { | |
1042 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
1043 | struct batadv_tt_global_entry, |
1044 | common); | |
acd34afa | 1045 | if (!(tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM)) |
42d0b044 SE |
1046 | continue; |
1047 | if (!batadv_has_timed_out(tt_global_entry->roam_at, | |
1048 | BATADV_TT_CLIENT_ROAM_TIMEOUT)) | |
1049 | continue; | |
1050 | ||
39c75a51 | 1051 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
42d0b044 SE |
1052 | "Deleting global tt entry (%pM): Roaming timeout\n", |
1053 | tt_global_entry->common.addr); | |
1054 | ||
1055 | hlist_del_rcu(node); | |
1056 | batadv_tt_global_entry_free_ref(tt_global_entry); | |
1057 | } | |
1058 | } | |
1059 | ||
56303d34 | 1060 | static void batadv_tt_global_roam_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1061 | { |
5bf74e9c | 1062 | struct batadv_hashtable *hash = bat_priv->tt_global_hash; |
cc47f66e | 1063 | struct hlist_head *head; |
7683fdc1 | 1064 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1065 | uint32_t i; |
cc47f66e | 1066 | |
cc47f66e AQ |
1067 | for (i = 0; i < hash->size; i++) { |
1068 | head = &hash->table[i]; | |
7683fdc1 | 1069 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1070 | |
7683fdc1 | 1071 | spin_lock_bh(list_lock); |
42d0b044 | 1072 | batadv_tt_global_roam_purge_list(bat_priv, head); |
7683fdc1 | 1073 | spin_unlock_bh(list_lock); |
cc47f66e AQ |
1074 | } |
1075 | ||
cc47f66e AQ |
1076 | } |
1077 | ||
56303d34 | 1078 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1079 | { |
5bf74e9c | 1080 | struct batadv_hashtable *hash; |
7683fdc1 | 1081 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1082 | struct batadv_tt_common_entry *tt_common_entry; |
1083 | struct batadv_tt_global_entry *tt_global; | |
7683fdc1 AQ |
1084 | struct hlist_node *node, *node_tmp; |
1085 | struct hlist_head *head; | |
c90681b8 | 1086 | uint32_t i; |
7683fdc1 | 1087 | |
2dafb49d | 1088 | if (!bat_priv->tt_global_hash) |
c6c8fea2 SE |
1089 | return; |
1090 | ||
7683fdc1 AQ |
1091 | hash = bat_priv->tt_global_hash; |
1092 | ||
1093 | for (i = 0; i < hash->size; i++) { | |
1094 | head = &hash->table[i]; | |
1095 | list_lock = &hash->list_locks[i]; | |
1096 | ||
1097 | spin_lock_bh(list_lock); | |
48100bac | 1098 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
7683fdc1 AQ |
1099 | head, hash_entry) { |
1100 | hlist_del_rcu(node); | |
56303d34 SE |
1101 | tt_global = container_of(tt_common_entry, |
1102 | struct batadv_tt_global_entry, | |
1103 | common); | |
1104 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1105 | } |
1106 | spin_unlock_bh(list_lock); | |
1107 | } | |
1108 | ||
1a8eaf07 | 1109 | batadv_hash_destroy(hash); |
7683fdc1 | 1110 | |
2dafb49d | 1111 | bat_priv->tt_global_hash = NULL; |
c6c8fea2 SE |
1112 | } |
1113 | ||
56303d34 SE |
1114 | static bool |
1115 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1116 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1117 | { |
1118 | bool ret = false; | |
1119 | ||
acd34afa SE |
1120 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1121 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1122 | ret = true; |
1123 | ||
1124 | return ret; | |
1125 | } | |
1126 | ||
56303d34 SE |
1127 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1128 | const uint8_t *src, | |
1129 | const uint8_t *addr) | |
c6c8fea2 | 1130 | { |
56303d34 SE |
1131 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1132 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1133 | struct batadv_orig_node *orig_node = NULL; | |
1134 | struct batadv_neigh_node *router = NULL; | |
db08e6e5 SW |
1135 | struct hlist_head *head; |
1136 | struct hlist_node *node; | |
56303d34 | 1137 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1138 | int best_tq; |
c6c8fea2 | 1139 | |
3d393e47 | 1140 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1141 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
3d393e47 AQ |
1142 | if (!tt_local_entry) |
1143 | goto out; | |
1144 | } | |
7aadf889 | 1145 | |
a513088d | 1146 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1147 | if (!tt_global_entry) |
7b36e8ee | 1148 | goto out; |
7aadf889 | 1149 | |
3d393e47 | 1150 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1151 | * isolation |
1152 | */ | |
a513088d SE |
1153 | if (tt_local_entry && |
1154 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1155 | goto out; |
1156 | ||
db08e6e5 | 1157 | best_tq = 0; |
c6c8fea2 | 1158 | |
db08e6e5 SW |
1159 | rcu_read_lock(); |
1160 | head = &tt_global_entry->orig_list; | |
1161 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
7d211efc | 1162 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
db08e6e5 SW |
1163 | if (!router) |
1164 | continue; | |
c6c8fea2 | 1165 | |
db08e6e5 SW |
1166 | if (router->tq_avg > best_tq) { |
1167 | orig_node = orig_entry->orig_node; | |
1168 | best_tq = router->tq_avg; | |
1169 | } | |
7d211efc | 1170 | batadv_neigh_node_free_ref(router); |
db08e6e5 SW |
1171 | } |
1172 | /* found anything? */ | |
1173 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) | |
1174 | orig_node = NULL; | |
1175 | rcu_read_unlock(); | |
7b36e8ee | 1176 | out: |
3d393e47 | 1177 | if (tt_global_entry) |
a513088d | 1178 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1179 | if (tt_local_entry) |
a513088d | 1180 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1181 | |
7b36e8ee | 1182 | return orig_node; |
c6c8fea2 | 1183 | } |
a73105b8 AQ |
1184 | |
1185 | /* Calculates the checksum of the local table of a given orig_node */ | |
56303d34 SE |
1186 | static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, |
1187 | struct batadv_orig_node *orig_node) | |
a73105b8 AQ |
1188 | { |
1189 | uint16_t total = 0, total_one; | |
5bf74e9c | 1190 | struct batadv_hashtable *hash = bat_priv->tt_global_hash; |
56303d34 SE |
1191 | struct batadv_tt_common_entry *tt_common; |
1192 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 AQ |
1193 | struct hlist_node *node; |
1194 | struct hlist_head *head; | |
c90681b8 AQ |
1195 | uint32_t i; |
1196 | int j; | |
a73105b8 AQ |
1197 | |
1198 | for (i = 0; i < hash->size; i++) { | |
1199 | head = &hash->table[i]; | |
1200 | ||
1201 | rcu_read_lock(); | |
acd34afa | 1202 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
56303d34 SE |
1203 | tt_global = container_of(tt_common, |
1204 | struct batadv_tt_global_entry, | |
1205 | common); | |
db08e6e5 SW |
1206 | /* Roaming clients are in the global table for |
1207 | * consistency only. They don't have to be | |
1208 | * taken into account while computing the | |
1209 | * global crc | |
1210 | */ | |
acd34afa | 1211 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 SW |
1212 | continue; |
1213 | ||
1214 | /* find out if this global entry is announced by this | |
1215 | * originator | |
1216 | */ | |
56303d34 | 1217 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1218 | orig_node)) |
db08e6e5 SW |
1219 | continue; |
1220 | ||
1221 | total_one = 0; | |
1222 | for (j = 0; j < ETH_ALEN; j++) | |
1223 | total_one = crc16_byte(total_one, | |
acd34afa | 1224 | tt_common->addr[j]); |
db08e6e5 | 1225 | total ^= total_one; |
a73105b8 AQ |
1226 | } |
1227 | rcu_read_unlock(); | |
1228 | } | |
1229 | ||
1230 | return total; | |
1231 | } | |
1232 | ||
1233 | /* Calculates the checksum of the local table */ | |
56303d34 | 1234 | static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv) |
a73105b8 AQ |
1235 | { |
1236 | uint16_t total = 0, total_one; | |
5bf74e9c | 1237 | struct batadv_hashtable *hash = bat_priv->tt_local_hash; |
56303d34 | 1238 | struct batadv_tt_common_entry *tt_common; |
a73105b8 AQ |
1239 | struct hlist_node *node; |
1240 | struct hlist_head *head; | |
c90681b8 AQ |
1241 | uint32_t i; |
1242 | int j; | |
a73105b8 AQ |
1243 | |
1244 | for (i = 0; i < hash->size; i++) { | |
1245 | head = &hash->table[i]; | |
1246 | ||
1247 | rcu_read_lock(); | |
acd34afa | 1248 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
058d0e26 | 1249 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1250 | * account while computing the CRC |
1251 | */ | |
acd34afa | 1252 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1253 | continue; |
a73105b8 AQ |
1254 | total_one = 0; |
1255 | for (j = 0; j < ETH_ALEN; j++) | |
1256 | total_one = crc16_byte(total_one, | |
acd34afa | 1257 | tt_common->addr[j]); |
a73105b8 AQ |
1258 | total ^= total_one; |
1259 | } | |
a73105b8 AQ |
1260 | rcu_read_unlock(); |
1261 | } | |
1262 | ||
1263 | return total; | |
1264 | } | |
1265 | ||
56303d34 | 1266 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1267 | { |
56303d34 | 1268 | struct batadv_tt_req_node *node, *safe; |
a73105b8 AQ |
1269 | |
1270 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1271 | ||
1272 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
1273 | list_del(&node->list); | |
1274 | kfree(node); | |
1275 | } | |
1276 | ||
1277 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1278 | } | |
1279 | ||
56303d34 SE |
1280 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1281 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1282 | const unsigned char *tt_buff, |
1283 | uint8_t tt_num_changes) | |
a73105b8 | 1284 | { |
08c36d3e | 1285 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
a73105b8 AQ |
1286 | |
1287 | /* Replace the old buffer only if I received something in the | |
9cfc7bd6 SE |
1288 | * last OGM (the OGM could carry no changes) |
1289 | */ | |
a73105b8 AQ |
1290 | spin_lock_bh(&orig_node->tt_buff_lock); |
1291 | if (tt_buff_len > 0) { | |
1292 | kfree(orig_node->tt_buff); | |
1293 | orig_node->tt_buff_len = 0; | |
1294 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1295 | if (orig_node->tt_buff) { | |
1296 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1297 | orig_node->tt_buff_len = tt_buff_len; | |
1298 | } | |
1299 | } | |
1300 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1301 | } | |
1302 | ||
56303d34 | 1303 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1304 | { |
56303d34 | 1305 | struct batadv_tt_req_node *node, *safe; |
a73105b8 AQ |
1306 | |
1307 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1308 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
42d0b044 SE |
1309 | if (batadv_has_timed_out(node->issued_at, |
1310 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1311 | list_del(&node->list); |
1312 | kfree(node); | |
1313 | } | |
1314 | } | |
1315 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1316 | } | |
1317 | ||
1318 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1319 | * has already been issued for this orig_node, NULL otherwise |
1320 | */ | |
56303d34 SE |
1321 | static struct batadv_tt_req_node * |
1322 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1323 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1324 | { |
56303d34 | 1325 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 AQ |
1326 | |
1327 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1328 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt_req_list, list) { | |
1eda58bf SE |
1329 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1330 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1331 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1332 | goto unlock; |
1333 | } | |
1334 | ||
1335 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1336 | if (!tt_req_node) | |
1337 | goto unlock; | |
1338 | ||
1339 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1340 | tt_req_node->issued_at = jiffies; | |
1341 | ||
1342 | list_add(&tt_req_node->list, &bat_priv->tt_req_list); | |
1343 | unlock: | |
1344 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1345 | return tt_req_node; | |
1346 | } | |
1347 | ||
058d0e26 | 1348 | /* data_ptr is useless here, but has to be kept to respect the prototype */ |
a513088d SE |
1349 | static int batadv_tt_local_valid_entry(const void *entry_ptr, |
1350 | const void *data_ptr) | |
058d0e26 | 1351 | { |
56303d34 | 1352 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1353 | |
acd34afa | 1354 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1355 | return 0; |
1356 | return 1; | |
1357 | } | |
1358 | ||
a513088d SE |
1359 | static int batadv_tt_global_valid(const void *entry_ptr, |
1360 | const void *data_ptr) | |
a73105b8 | 1361 | { |
56303d34 SE |
1362 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1363 | const struct batadv_tt_global_entry *tt_global_entry; | |
1364 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1365 | |
acd34afa | 1366 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM) |
cc47f66e AQ |
1367 | return 0; |
1368 | ||
56303d34 SE |
1369 | tt_global_entry = container_of(tt_common_entry, |
1370 | struct batadv_tt_global_entry, | |
48100bac AQ |
1371 | common); |
1372 | ||
a513088d | 1373 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1374 | } |
1375 | ||
a513088d SE |
1376 | static struct sk_buff * |
1377 | batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, | |
5bf74e9c | 1378 | struct batadv_hashtable *hash, |
56303d34 | 1379 | struct batadv_hard_iface *primary_if, |
a513088d SE |
1380 | int (*valid_cb)(const void *, const void *), |
1381 | void *cb_data) | |
a73105b8 | 1382 | { |
56303d34 | 1383 | struct batadv_tt_common_entry *tt_common_entry; |
96412690 SE |
1384 | struct batadv_tt_query_packet *tt_response; |
1385 | struct batadv_tt_change *tt_change; | |
a73105b8 AQ |
1386 | struct hlist_node *node; |
1387 | struct hlist_head *head; | |
1388 | struct sk_buff *skb = NULL; | |
1389 | uint16_t tt_tot, tt_count; | |
96412690 | 1390 | ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet); |
c90681b8 | 1391 | uint32_t i; |
96412690 | 1392 | size_t len; |
a73105b8 AQ |
1393 | |
1394 | if (tt_query_size + tt_len > primary_if->soft_iface->mtu) { | |
1395 | tt_len = primary_if->soft_iface->mtu - tt_query_size; | |
96412690 | 1396 | tt_len -= tt_len % sizeof(struct batadv_tt_change); |
a73105b8 | 1397 | } |
96412690 | 1398 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1399 | |
96412690 SE |
1400 | len = tt_query_size + tt_len; |
1401 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1402 | if (!skb) |
1403 | goto out; | |
1404 | ||
1405 | skb_reserve(skb, ETH_HLEN); | |
96412690 | 1406 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len); |
a73105b8 | 1407 | tt_response->ttvn = ttvn; |
a73105b8 | 1408 | |
96412690 | 1409 | tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size); |
a73105b8 AQ |
1410 | tt_count = 0; |
1411 | ||
1412 | rcu_read_lock(); | |
1413 | for (i = 0; i < hash->size; i++) { | |
1414 | head = &hash->table[i]; | |
1415 | ||
48100bac | 1416 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 AQ |
1417 | head, hash_entry) { |
1418 | if (tt_count == tt_tot) | |
1419 | break; | |
1420 | ||
48100bac | 1421 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1422 | continue; |
1423 | ||
48100bac AQ |
1424 | memcpy(tt_change->addr, tt_common_entry->addr, |
1425 | ETH_ALEN); | |
42d0b044 | 1426 | tt_change->flags = BATADV_NO_FLAGS; |
a73105b8 AQ |
1427 | |
1428 | tt_count++; | |
1429 | tt_change++; | |
1430 | } | |
1431 | } | |
1432 | rcu_read_unlock(); | |
1433 | ||
9d852393 | 1434 | /* store in the message the number of entries we have successfully |
9cfc7bd6 SE |
1435 | * copied |
1436 | */ | |
9d852393 AQ |
1437 | tt_response->tt_data = htons(tt_count); |
1438 | ||
a73105b8 AQ |
1439 | out: |
1440 | return skb; | |
1441 | } | |
1442 | ||
56303d34 SE |
1443 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1444 | struct batadv_orig_node *dst_orig_node, | |
a513088d SE |
1445 | uint8_t ttvn, uint16_t tt_crc, |
1446 | bool full_table) | |
a73105b8 AQ |
1447 | { |
1448 | struct sk_buff *skb = NULL; | |
96412690 | 1449 | struct batadv_tt_query_packet *tt_request; |
56303d34 SE |
1450 | struct batadv_neigh_node *neigh_node = NULL; |
1451 | struct batadv_hard_iface *primary_if; | |
1452 | struct batadv_tt_req_node *tt_req_node = NULL; | |
a73105b8 | 1453 | int ret = 1; |
96412690 | 1454 | size_t tt_req_len; |
a73105b8 | 1455 | |
e5d89254 | 1456 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1457 | if (!primary_if) |
1458 | goto out; | |
1459 | ||
1460 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1461 | * reply from the same orig_node yet |
1462 | */ | |
a513088d | 1463 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1464 | if (!tt_req_node) |
1465 | goto out; | |
1466 | ||
96412690 | 1467 | skb = dev_alloc_skb(sizeof(*tt_request) + ETH_HLEN); |
a73105b8 AQ |
1468 | if (!skb) |
1469 | goto out; | |
1470 | ||
1471 | skb_reserve(skb, ETH_HLEN); | |
1472 | ||
96412690 SE |
1473 | tt_req_len = sizeof(*tt_request); |
1474 | tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len); | |
a73105b8 | 1475 | |
acd34afa | 1476 | tt_request->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1477 | tt_request->header.version = BATADV_COMPAT_VERSION; |
a73105b8 AQ |
1478 | memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1479 | memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); | |
42d0b044 | 1480 | tt_request->header.ttl = BATADV_TTL; |
a73105b8 | 1481 | tt_request->ttvn = ttvn; |
6d2003fc | 1482 | tt_request->tt_data = htons(tt_crc); |
acd34afa | 1483 | tt_request->flags = BATADV_TT_REQUEST; |
a73105b8 AQ |
1484 | |
1485 | if (full_table) | |
acd34afa | 1486 | tt_request->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1487 | |
7d211efc | 1488 | neigh_node = batadv_orig_node_get_router(dst_orig_node); |
a73105b8 AQ |
1489 | if (!neigh_node) |
1490 | goto out; | |
1491 | ||
39c75a51 | 1492 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1493 | "Sending TT_REQUEST to %pM via %pM [%c]\n", |
1494 | dst_orig_node->orig, neigh_node->addr, | |
1495 | (full_table ? 'F' : '.')); | |
a73105b8 | 1496 | |
d69909d2 | 1497 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
f8214865 | 1498 | |
9455e34c | 1499 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1500 | ret = 0; |
1501 | ||
1502 | out: | |
1503 | if (neigh_node) | |
7d211efc | 1504 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1505 | if (primary_if) |
e5d89254 | 1506 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1507 | if (ret) |
1508 | kfree_skb(skb); | |
1509 | if (ret && tt_req_node) { | |
1510 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1511 | list_del(&tt_req_node->list); | |
1512 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1513 | kfree(tt_req_node); | |
1514 | } | |
1515 | return ret; | |
1516 | } | |
1517 | ||
96412690 | 1518 | static bool |
56303d34 | 1519 | batadv_send_other_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1520 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1521 | { |
56303d34 SE |
1522 | struct batadv_orig_node *req_dst_orig_node = NULL; |
1523 | struct batadv_orig_node *res_dst_orig_node = NULL; | |
1524 | struct batadv_neigh_node *neigh_node = NULL; | |
1525 | struct batadv_hard_iface *primary_if = NULL; | |
a73105b8 AQ |
1526 | uint8_t orig_ttvn, req_ttvn, ttvn; |
1527 | int ret = false; | |
1528 | unsigned char *tt_buff; | |
1529 | bool full_table; | |
1530 | uint16_t tt_len, tt_tot; | |
1531 | struct sk_buff *skb = NULL; | |
96412690 SE |
1532 | struct batadv_tt_query_packet *tt_response; |
1533 | size_t len; | |
a73105b8 | 1534 | |
39c75a51 | 1535 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1536 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
1537 | tt_request->src, tt_request->ttvn, tt_request->dst, | |
acd34afa | 1538 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1539 | |
1540 | /* Let's get the orig node of the REAL destination */ | |
da641193 | 1541 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); |
a73105b8 AQ |
1542 | if (!req_dst_orig_node) |
1543 | goto out; | |
1544 | ||
da641193 | 1545 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1546 | if (!res_dst_orig_node) |
1547 | goto out; | |
1548 | ||
7d211efc | 1549 | neigh_node = batadv_orig_node_get_router(res_dst_orig_node); |
a73105b8 AQ |
1550 | if (!neigh_node) |
1551 | goto out; | |
1552 | ||
e5d89254 | 1553 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1554 | if (!primary_if) |
1555 | goto out; | |
1556 | ||
1557 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); | |
1558 | req_ttvn = tt_request->ttvn; | |
1559 | ||
015758d0 | 1560 | /* I don't have the requested data */ |
a73105b8 | 1561 | if (orig_ttvn != req_ttvn || |
f25bd58a | 1562 | tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1563 | goto out; |
1564 | ||
015758d0 | 1565 | /* If the full table has been explicitly requested */ |
acd34afa | 1566 | if (tt_request->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1567 | !req_dst_orig_node->tt_buff) |
1568 | full_table = true; | |
1569 | else | |
1570 | full_table = false; | |
1571 | ||
1572 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1573 | * I'll send only one packet with as much TT entries as I can |
1574 | */ | |
a73105b8 AQ |
1575 | if (!full_table) { |
1576 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1577 | tt_len = req_dst_orig_node->tt_buff_len; | |
96412690 | 1578 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1579 | |
96412690 SE |
1580 | len = sizeof(*tt_response) + tt_len; |
1581 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1582 | if (!skb) |
1583 | goto unlock; | |
1584 | ||
1585 | skb_reserve(skb, ETH_HLEN); | |
96412690 SE |
1586 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, |
1587 | len); | |
a73105b8 AQ |
1588 | tt_response->ttvn = req_ttvn; |
1589 | tt_response->tt_data = htons(tt_tot); | |
1590 | ||
96412690 | 1591 | tt_buff = skb->data + sizeof(*tt_response); |
a73105b8 AQ |
1592 | /* Copy the last orig_node's OGM buffer */ |
1593 | memcpy(tt_buff, req_dst_orig_node->tt_buff, | |
1594 | req_dst_orig_node->tt_buff_len); | |
1595 | ||
1596 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1597 | } else { | |
96412690 SE |
1598 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
1599 | tt_len *= sizeof(struct batadv_tt_change); | |
a73105b8 AQ |
1600 | ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
1601 | ||
a513088d SE |
1602 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
1603 | bat_priv->tt_global_hash, | |
1604 | primary_if, | |
1605 | batadv_tt_global_valid, | |
1606 | req_dst_orig_node); | |
a73105b8 AQ |
1607 | if (!skb) |
1608 | goto out; | |
1609 | ||
96412690 | 1610 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1611 | } |
1612 | ||
acd34afa | 1613 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1614 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1615 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1616 | memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); |
1617 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1618 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1619 | |
1620 | if (full_table) | |
acd34afa | 1621 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1622 | |
39c75a51 | 1623 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1624 | "Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n", |
1625 | res_dst_orig_node->orig, neigh_node->addr, | |
1626 | req_dst_orig_node->orig, req_ttvn); | |
a73105b8 | 1627 | |
d69909d2 | 1628 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1629 | |
9455e34c | 1630 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1631 | ret = true; |
1632 | goto out; | |
1633 | ||
1634 | unlock: | |
1635 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1636 | ||
1637 | out: | |
1638 | if (res_dst_orig_node) | |
7d211efc | 1639 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1640 | if (req_dst_orig_node) |
7d211efc | 1641 | batadv_orig_node_free_ref(req_dst_orig_node); |
a73105b8 | 1642 | if (neigh_node) |
7d211efc | 1643 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1644 | if (primary_if) |
e5d89254 | 1645 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1646 | if (!ret) |
1647 | kfree_skb(skb); | |
1648 | return ret; | |
1649 | ||
1650 | } | |
96412690 SE |
1651 | |
1652 | static bool | |
56303d34 | 1653 | batadv_send_my_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1654 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1655 | { |
56303d34 SE |
1656 | struct batadv_orig_node *orig_node = NULL; |
1657 | struct batadv_neigh_node *neigh_node = NULL; | |
1658 | struct batadv_hard_iface *primary_if = NULL; | |
a73105b8 AQ |
1659 | uint8_t my_ttvn, req_ttvn, ttvn; |
1660 | int ret = false; | |
1661 | unsigned char *tt_buff; | |
1662 | bool full_table; | |
1663 | uint16_t tt_len, tt_tot; | |
1664 | struct sk_buff *skb = NULL; | |
96412690 SE |
1665 | struct batadv_tt_query_packet *tt_response; |
1666 | size_t len; | |
a73105b8 | 1667 | |
39c75a51 | 1668 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1669 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
1670 | tt_request->src, tt_request->ttvn, | |
acd34afa | 1671 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1672 | |
1673 | ||
1674 | my_ttvn = (uint8_t)atomic_read(&bat_priv->ttvn); | |
1675 | req_ttvn = tt_request->ttvn; | |
1676 | ||
da641193 | 1677 | orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1678 | if (!orig_node) |
1679 | goto out; | |
1680 | ||
7d211efc | 1681 | neigh_node = batadv_orig_node_get_router(orig_node); |
a73105b8 AQ |
1682 | if (!neigh_node) |
1683 | goto out; | |
1684 | ||
e5d89254 | 1685 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1686 | if (!primary_if) |
1687 | goto out; | |
1688 | ||
1689 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1690 | * is too big send the whole local translation table |
1691 | */ | |
acd34afa | 1692 | if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
a73105b8 AQ |
1693 | !bat_priv->tt_buff) |
1694 | full_table = true; | |
1695 | else | |
1696 | full_table = false; | |
1697 | ||
1698 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1699 | * I'll send only one packet with as much TT entries as I can |
1700 | */ | |
a73105b8 AQ |
1701 | if (!full_table) { |
1702 | spin_lock_bh(&bat_priv->tt_buff_lock); | |
1703 | tt_len = bat_priv->tt_buff_len; | |
96412690 | 1704 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1705 | |
96412690 SE |
1706 | len = sizeof(*tt_response) + tt_len; |
1707 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1708 | if (!skb) |
1709 | goto unlock; | |
1710 | ||
1711 | skb_reserve(skb, ETH_HLEN); | |
96412690 SE |
1712 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, |
1713 | len); | |
a73105b8 AQ |
1714 | tt_response->ttvn = req_ttvn; |
1715 | tt_response->tt_data = htons(tt_tot); | |
1716 | ||
96412690 | 1717 | tt_buff = skb->data + sizeof(*tt_response); |
a73105b8 AQ |
1718 | memcpy(tt_buff, bat_priv->tt_buff, |
1719 | bat_priv->tt_buff_len); | |
1720 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
1721 | } else { | |
96412690 SE |
1722 | tt_len = (uint16_t)atomic_read(&bat_priv->num_local_tt); |
1723 | tt_len *= sizeof(struct batadv_tt_change); | |
a73105b8 AQ |
1724 | ttvn = (uint8_t)atomic_read(&bat_priv->ttvn); |
1725 | ||
a513088d SE |
1726 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
1727 | bat_priv->tt_local_hash, | |
1728 | primary_if, | |
1729 | batadv_tt_local_valid_entry, | |
1730 | NULL); | |
a73105b8 AQ |
1731 | if (!skb) |
1732 | goto out; | |
1733 | ||
96412690 | 1734 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1735 | } |
1736 | ||
acd34afa | 1737 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1738 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1739 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1740 | memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1741 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1742 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1743 | |
1744 | if (full_table) | |
acd34afa | 1745 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1746 | |
39c75a51 | 1747 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1748 | "Sending TT_RESPONSE to %pM via %pM [%c]\n", |
1749 | orig_node->orig, neigh_node->addr, | |
acd34afa | 1750 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1751 | |
d69909d2 | 1752 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1753 | |
9455e34c | 1754 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1755 | ret = true; |
1756 | goto out; | |
1757 | ||
1758 | unlock: | |
1759 | spin_unlock_bh(&bat_priv->tt_buff_lock); | |
1760 | out: | |
1761 | if (orig_node) | |
7d211efc | 1762 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1763 | if (neigh_node) |
7d211efc | 1764 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1765 | if (primary_if) |
e5d89254 | 1766 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1767 | if (!ret) |
1768 | kfree_skb(skb); | |
1769 | /* This packet was for me, so it doesn't need to be re-routed */ | |
1770 | return true; | |
1771 | } | |
1772 | ||
56303d34 | 1773 | bool batadv_send_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1774 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1775 | { |
3193e8fd | 1776 | if (batadv_is_my_mac(tt_request->dst)) { |
20ff9d59 | 1777 | /* don't answer backbone gws! */ |
08adf151 | 1778 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) |
20ff9d59 SW |
1779 | return true; |
1780 | ||
a513088d | 1781 | return batadv_send_my_tt_response(bat_priv, tt_request); |
20ff9d59 | 1782 | } else { |
a513088d | 1783 | return batadv_send_other_tt_response(bat_priv, tt_request); |
20ff9d59 | 1784 | } |
a73105b8 AQ |
1785 | } |
1786 | ||
56303d34 SE |
1787 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1788 | struct batadv_orig_node *orig_node, | |
96412690 | 1789 | struct batadv_tt_change *tt_change, |
a513088d | 1790 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
1791 | { |
1792 | int i; | |
a513088d | 1793 | int roams; |
a73105b8 AQ |
1794 | |
1795 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
1796 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
1797 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
1798 | batadv_tt_global_del(bat_priv, orig_node, |
1799 | (tt_change + i)->addr, | |
d4f44692 AQ |
1800 | "tt removed by changes", |
1801 | roams); | |
08c36d3e | 1802 | } else { |
08c36d3e | 1803 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 AQ |
1804 | (tt_change + i)->addr, |
1805 | (tt_change + i)->flags, ttvn)) | |
a73105b8 AQ |
1806 | /* In case of problem while storing a |
1807 | * global_entry, we stop the updating | |
1808 | * procedure without committing the | |
1809 | * ttvn change. This will avoid to send | |
1810 | * corrupted data on tt_request | |
1811 | */ | |
1812 | return; | |
08c36d3e | 1813 | } |
a73105b8 | 1814 | } |
17071578 | 1815 | orig_node->tt_initialised = true; |
a73105b8 AQ |
1816 | } |
1817 | ||
56303d34 | 1818 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
96412690 | 1819 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 1820 | { |
56303d34 | 1821 | struct batadv_orig_node *orig_node = NULL; |
a73105b8 | 1822 | |
da641193 | 1823 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1824 | if (!orig_node) |
1825 | goto out; | |
1826 | ||
1827 | /* Purge the old table first.. */ | |
08c36d3e | 1828 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 1829 | |
a513088d | 1830 | _batadv_tt_update_changes(bat_priv, orig_node, |
96412690 | 1831 | (struct batadv_tt_change *)(tt_response + 1), |
a513088d SE |
1832 | ntohs(tt_response->tt_data), |
1833 | tt_response->ttvn); | |
a73105b8 AQ |
1834 | |
1835 | spin_lock_bh(&orig_node->tt_buff_lock); | |
1836 | kfree(orig_node->tt_buff); | |
1837 | orig_node->tt_buff_len = 0; | |
1838 | orig_node->tt_buff = NULL; | |
1839 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1840 | ||
1841 | atomic_set(&orig_node->last_ttvn, tt_response->ttvn); | |
1842 | ||
1843 | out: | |
1844 | if (orig_node) | |
7d211efc | 1845 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
1846 | } |
1847 | ||
56303d34 SE |
1848 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1849 | struct batadv_orig_node *orig_node, | |
a513088d | 1850 | uint16_t tt_num_changes, uint8_t ttvn, |
96412690 | 1851 | struct batadv_tt_change *tt_change) |
a73105b8 | 1852 | { |
a513088d SE |
1853 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
1854 | tt_num_changes, ttvn); | |
a73105b8 | 1855 | |
a513088d SE |
1856 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
1857 | (unsigned char *)tt_change, tt_num_changes); | |
a73105b8 AQ |
1858 | atomic_set(&orig_node->last_ttvn, ttvn); |
1859 | } | |
1860 | ||
56303d34 | 1861 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 1862 | { |
56303d34 | 1863 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
7683fdc1 | 1864 | bool ret = false; |
a73105b8 | 1865 | |
a513088d | 1866 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
1867 | if (!tt_local_entry) |
1868 | goto out; | |
058d0e26 | 1869 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
1870 | * consistency purpose) |
1871 | */ | |
acd34afa | 1872 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) |
058d0e26 | 1873 | goto out; |
7683fdc1 AQ |
1874 | ret = true; |
1875 | out: | |
a73105b8 | 1876 | if (tt_local_entry) |
a513088d | 1877 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 1878 | return ret; |
a73105b8 AQ |
1879 | } |
1880 | ||
56303d34 | 1881 | void batadv_handle_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1882 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 1883 | { |
56303d34 SE |
1884 | struct batadv_tt_req_node *node, *safe; |
1885 | struct batadv_orig_node *orig_node = NULL; | |
96412690 | 1886 | struct batadv_tt_change *tt_change; |
a73105b8 | 1887 | |
39c75a51 | 1888 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1889 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
1890 | tt_response->src, tt_response->ttvn, | |
1891 | ntohs(tt_response->tt_data), | |
acd34afa | 1892 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1893 | |
20ff9d59 | 1894 | /* we should have never asked a backbone gw */ |
08adf151 | 1895 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) |
20ff9d59 SW |
1896 | goto out; |
1897 | ||
da641193 | 1898 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1899 | if (!orig_node) |
1900 | goto out; | |
1901 | ||
96412690 | 1902 | if (tt_response->flags & BATADV_TT_FULL_TABLE) { |
a513088d | 1903 | batadv_tt_fill_gtable(bat_priv, tt_response); |
96412690 SE |
1904 | } else { |
1905 | tt_change = (struct batadv_tt_change *)(tt_response + 1); | |
a513088d SE |
1906 | batadv_tt_update_changes(bat_priv, orig_node, |
1907 | ntohs(tt_response->tt_data), | |
96412690 SE |
1908 | tt_response->ttvn, tt_change); |
1909 | } | |
a73105b8 AQ |
1910 | |
1911 | /* Delete the tt_req_node from pending tt_requests list */ | |
1912 | spin_lock_bh(&bat_priv->tt_req_list_lock); | |
1913 | list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) { | |
1eda58bf | 1914 | if (!batadv_compare_eth(node->addr, tt_response->src)) |
a73105b8 AQ |
1915 | continue; |
1916 | list_del(&node->list); | |
1917 | kfree(node); | |
1918 | } | |
1919 | spin_unlock_bh(&bat_priv->tt_req_list_lock); | |
1920 | ||
1921 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 1922 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
cc47f66e | 1923 | /* Roaming phase is over: tables are in sync again. I can |
9cfc7bd6 SE |
1924 | * unset the flag |
1925 | */ | |
cc47f66e | 1926 | orig_node->tt_poss_change = false; |
a73105b8 AQ |
1927 | out: |
1928 | if (orig_node) | |
7d211efc | 1929 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
1930 | } |
1931 | ||
56303d34 | 1932 | int batadv_tt_init(struct batadv_priv *bat_priv) |
a73105b8 | 1933 | { |
5346c35e | 1934 | int ret; |
a73105b8 | 1935 | |
a513088d | 1936 | ret = batadv_tt_local_init(bat_priv); |
5346c35e SE |
1937 | if (ret < 0) |
1938 | return ret; | |
1939 | ||
a513088d | 1940 | ret = batadv_tt_global_init(bat_priv); |
5346c35e SE |
1941 | if (ret < 0) |
1942 | return ret; | |
a73105b8 | 1943 | |
a513088d | 1944 | batadv_tt_start_timer(bat_priv); |
a73105b8 AQ |
1945 | |
1946 | return 1; | |
1947 | } | |
1948 | ||
56303d34 | 1949 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1950 | { |
56303d34 | 1951 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 1952 | |
cc47f66e | 1953 | spin_lock_bh(&bat_priv->tt_roam_list_lock); |
a73105b8 | 1954 | |
cc47f66e AQ |
1955 | list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) { |
1956 | list_del(&node->list); | |
1957 | kfree(node); | |
1958 | } | |
1959 | ||
1960 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
1961 | } | |
1962 | ||
56303d34 | 1963 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 1964 | { |
56303d34 | 1965 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e AQ |
1966 | |
1967 | spin_lock_bh(&bat_priv->tt_roam_list_lock); | |
1968 | list_for_each_entry_safe(node, safe, &bat_priv->tt_roam_list, list) { | |
42d0b044 SE |
1969 | if (!batadv_has_timed_out(node->first_time, |
1970 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
1971 | continue; |
1972 | ||
1973 | list_del(&node->list); | |
1974 | kfree(node); | |
1975 | } | |
1976 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
1977 | } | |
1978 | ||
1979 | /* This function checks whether the client already reached the | |
1980 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
1981 | * will not be sent. | |
1982 | * | |
9cfc7bd6 SE |
1983 | * returns true if the ROAMING_ADV can be sent, false otherwise |
1984 | */ | |
56303d34 | 1985 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 1986 | uint8_t *client) |
cc47f66e | 1987 | { |
56303d34 | 1988 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
1989 | bool ret = false; |
1990 | ||
1991 | spin_lock_bh(&bat_priv->tt_roam_list_lock); | |
1992 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1993 | * reply from the same orig_node yet |
1994 | */ | |
cc47f66e | 1995 | list_for_each_entry(tt_roam_node, &bat_priv->tt_roam_list, list) { |
1eda58bf | 1996 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
1997 | continue; |
1998 | ||
1eda58bf | 1999 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2000 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2001 | continue; |
2002 | ||
3e34819e | 2003 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2004 | /* Sorry, you roamed too many times! */ |
2005 | goto unlock; | |
2006 | ret = true; | |
2007 | break; | |
2008 | } | |
2009 | ||
2010 | if (!ret) { | |
2011 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2012 | if (!tt_roam_node) | |
2013 | goto unlock; | |
2014 | ||
2015 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2016 | atomic_set(&tt_roam_node->counter, |
2017 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2018 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2019 | ||
2020 | list_add(&tt_roam_node->list, &bat_priv->tt_roam_list); | |
2021 | ret = true; | |
2022 | } | |
2023 | ||
2024 | unlock: | |
2025 | spin_unlock_bh(&bat_priv->tt_roam_list_lock); | |
2026 | return ret; | |
2027 | } | |
2028 | ||
56303d34 SE |
2029 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
2030 | struct batadv_orig_node *orig_node) | |
cc47f66e | 2031 | { |
56303d34 | 2032 | struct batadv_neigh_node *neigh_node = NULL; |
cc47f66e | 2033 | struct sk_buff *skb = NULL; |
96412690 | 2034 | struct batadv_roam_adv_packet *roam_adv_packet; |
cc47f66e | 2035 | int ret = 1; |
56303d34 | 2036 | struct batadv_hard_iface *primary_if; |
96412690 | 2037 | size_t len = sizeof(*roam_adv_packet); |
cc47f66e AQ |
2038 | |
2039 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2040 | * already roamed to us too many times |
2041 | */ | |
a513088d | 2042 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2043 | goto out; |
2044 | ||
96412690 | 2045 | skb = dev_alloc_skb(sizeof(*roam_adv_packet) + ETH_HLEN); |
cc47f66e AQ |
2046 | if (!skb) |
2047 | goto out; | |
2048 | ||
2049 | skb_reserve(skb, ETH_HLEN); | |
2050 | ||
96412690 | 2051 | roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len); |
cc47f66e | 2052 | |
acd34afa | 2053 | roam_adv_packet->header.packet_type = BATADV_ROAM_ADV; |
7e071c79 | 2054 | roam_adv_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 2055 | roam_adv_packet->header.ttl = BATADV_TTL; |
162d549c | 2056 | roam_adv_packet->reserved = 0; |
e5d89254 | 2057 | primary_if = batadv_primary_if_get_selected(bat_priv); |
cc47f66e AQ |
2058 | if (!primary_if) |
2059 | goto out; | |
2060 | memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
e5d89254 | 2061 | batadv_hardif_free_ref(primary_if); |
cc47f66e AQ |
2062 | memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); |
2063 | memcpy(roam_adv_packet->client, client, ETH_ALEN); | |
2064 | ||
7d211efc | 2065 | neigh_node = batadv_orig_node_get_router(orig_node); |
cc47f66e AQ |
2066 | if (!neigh_node) |
2067 | goto out; | |
2068 | ||
39c75a51 | 2069 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2070 | "Sending ROAMING_ADV to %pM (client %pM) via %pM\n", |
2071 | orig_node->orig, client, neigh_node->addr); | |
cc47f66e | 2072 | |
d69909d2 | 2073 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2074 | |
9455e34c | 2075 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
cc47f66e AQ |
2076 | ret = 0; |
2077 | ||
2078 | out: | |
2079 | if (neigh_node) | |
7d211efc | 2080 | batadv_neigh_node_free_ref(neigh_node); |
cc47f66e AQ |
2081 | if (ret) |
2082 | kfree_skb(skb); | |
2083 | return; | |
a73105b8 AQ |
2084 | } |
2085 | ||
a513088d | 2086 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2087 | { |
56303d34 SE |
2088 | struct delayed_work *delayed_work; |
2089 | struct batadv_priv *bat_priv; | |
2090 | ||
2091 | delayed_work = container_of(work, struct delayed_work, work); | |
2092 | bat_priv = container_of(delayed_work, struct batadv_priv, tt_work); | |
a73105b8 | 2093 | |
a513088d SE |
2094 | batadv_tt_local_purge(bat_priv); |
2095 | batadv_tt_global_roam_purge(bat_priv); | |
2096 | batadv_tt_req_purge(bat_priv); | |
2097 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2098 | |
a513088d | 2099 | batadv_tt_start_timer(bat_priv); |
a73105b8 | 2100 | } |
cc47f66e | 2101 | |
56303d34 | 2102 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e AQ |
2103 | { |
2104 | cancel_delayed_work_sync(&bat_priv->tt_work); | |
2105 | ||
a513088d SE |
2106 | batadv_tt_local_table_free(bat_priv); |
2107 | batadv_tt_global_table_free(bat_priv); | |
2108 | batadv_tt_req_list_free(bat_priv); | |
2109 | batadv_tt_changes_list_free(bat_priv); | |
2110 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e AQ |
2111 | |
2112 | kfree(bat_priv->tt_buff); | |
2113 | } | |
058d0e26 | 2114 | |
697f2531 | 2115 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2116 | * in the given hash table and returns the number of modified entries |
2117 | */ | |
5bf74e9c SE |
2118 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2119 | uint16_t flags, bool enable) | |
058d0e26 | 2120 | { |
c90681b8 | 2121 | uint32_t i; |
697f2531 | 2122 | uint16_t changed_num = 0; |
058d0e26 AQ |
2123 | struct hlist_head *head; |
2124 | struct hlist_node *node; | |
56303d34 | 2125 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2126 | |
2127 | if (!hash) | |
697f2531 | 2128 | goto out; |
058d0e26 AQ |
2129 | |
2130 | for (i = 0; i < hash->size; i++) { | |
2131 | head = &hash->table[i]; | |
2132 | ||
2133 | rcu_read_lock(); | |
48100bac | 2134 | hlist_for_each_entry_rcu(tt_common_entry, node, |
058d0e26 | 2135 | head, hash_entry) { |
697f2531 AQ |
2136 | if (enable) { |
2137 | if ((tt_common_entry->flags & flags) == flags) | |
2138 | continue; | |
2139 | tt_common_entry->flags |= flags; | |
2140 | } else { | |
2141 | if (!(tt_common_entry->flags & flags)) | |
2142 | continue; | |
2143 | tt_common_entry->flags &= ~flags; | |
2144 | } | |
2145 | changed_num++; | |
058d0e26 AQ |
2146 | } |
2147 | rcu_read_unlock(); | |
2148 | } | |
697f2531 AQ |
2149 | out: |
2150 | return changed_num; | |
058d0e26 AQ |
2151 | } |
2152 | ||
acd34afa | 2153 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2154 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2155 | { |
5bf74e9c | 2156 | struct batadv_hashtable *hash = bat_priv->tt_local_hash; |
56303d34 SE |
2157 | struct batadv_tt_common_entry *tt_common; |
2158 | struct batadv_tt_local_entry *tt_local; | |
058d0e26 AQ |
2159 | struct hlist_node *node, *node_tmp; |
2160 | struct hlist_head *head; | |
2161 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2162 | uint32_t i; |
058d0e26 AQ |
2163 | |
2164 | if (!hash) | |
2165 | return; | |
2166 | ||
2167 | for (i = 0; i < hash->size; i++) { | |
2168 | head = &hash->table[i]; | |
2169 | list_lock = &hash->list_locks[i]; | |
2170 | ||
2171 | spin_lock_bh(list_lock); | |
acd34afa SE |
2172 | hlist_for_each_entry_safe(tt_common, node, node_tmp, head, |
2173 | hash_entry) { | |
2174 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2175 | continue; |
2176 | ||
39c75a51 | 2177 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2178 | "Deleting local tt entry (%pM): pending\n", |
acd34afa | 2179 | tt_common->addr); |
058d0e26 AQ |
2180 | |
2181 | atomic_dec(&bat_priv->num_local_tt); | |
2182 | hlist_del_rcu(node); | |
56303d34 SE |
2183 | tt_local = container_of(tt_common, |
2184 | struct batadv_tt_local_entry, | |
2185 | common); | |
2186 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2187 | } |
2188 | spin_unlock_bh(list_lock); | |
2189 | } | |
2190 | ||
2191 | } | |
2192 | ||
56303d34 | 2193 | static int batadv_tt_commit_changes(struct batadv_priv *bat_priv, |
a513088d SE |
2194 | unsigned char **packet_buff, |
2195 | int *packet_buff_len, int packet_min_len) | |
058d0e26 | 2196 | { |
be9aa4c1 ML |
2197 | uint16_t changed_num = 0; |
2198 | ||
2199 | if (atomic_read(&bat_priv->tt_local_changes) < 1) | |
2200 | return -ENOENT; | |
2201 | ||
a513088d | 2202 | changed_num = batadv_tt_set_flags(bat_priv->tt_local_hash, |
acd34afa | 2203 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2204 | |
2205 | /* all reset entries have to be counted as local entries */ | |
697f2531 | 2206 | atomic_add(changed_num, &bat_priv->num_local_tt); |
a513088d | 2207 | batadv_tt_local_purge_pending_clients(bat_priv); |
be9aa4c1 | 2208 | bat_priv->tt_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2209 | |
2210 | /* Increment the TTVN only once per OGM interval */ | |
2211 | atomic_inc(&bat_priv->ttvn); | |
39c75a51 | 2212 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2213 | "Local changes committed, updating to ttvn %u\n", |
2214 | (uint8_t)atomic_read(&bat_priv->ttvn)); | |
058d0e26 | 2215 | bat_priv->tt_poss_change = false; |
be9aa4c1 ML |
2216 | |
2217 | /* reset the sending counter */ | |
42d0b044 | 2218 | atomic_set(&bat_priv->tt_ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
be9aa4c1 | 2219 | |
a513088d SE |
2220 | return batadv_tt_changes_fill_buff(bat_priv, packet_buff, |
2221 | packet_buff_len, packet_min_len); | |
be9aa4c1 ML |
2222 | } |
2223 | ||
2224 | /* when calling this function (hard_iface == primary_if) has to be true */ | |
56303d34 | 2225 | int batadv_tt_append_diff(struct batadv_priv *bat_priv, |
be9aa4c1 ML |
2226 | unsigned char **packet_buff, int *packet_buff_len, |
2227 | int packet_min_len) | |
2228 | { | |
2229 | int tt_num_changes; | |
2230 | ||
2231 | /* if at least one change happened */ | |
a513088d SE |
2232 | tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, |
2233 | packet_buff_len, | |
2234 | packet_min_len); | |
be9aa4c1 ML |
2235 | |
2236 | /* if the changes have been sent often enough */ | |
2237 | if ((tt_num_changes < 0) && | |
3e34819e | 2238 | (!batadv_atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt))) { |
a513088d SE |
2239 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
2240 | packet_min_len, packet_min_len); | |
be9aa4c1 ML |
2241 | tt_num_changes = 0; |
2242 | } | |
2243 | ||
2244 | return tt_num_changes; | |
058d0e26 | 2245 | } |
59b699cd | 2246 | |
56303d34 | 2247 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
08c36d3e | 2248 | uint8_t *dst) |
59b699cd | 2249 | { |
56303d34 SE |
2250 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2251 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2252 | bool ret = false; |
59b699cd AQ |
2253 | |
2254 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2255 | goto out; |
59b699cd | 2256 | |
a513088d | 2257 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2258 | if (!tt_local_entry) |
2259 | goto out; | |
2260 | ||
a513088d | 2261 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2262 | if (!tt_global_entry) |
2263 | goto out; | |
2264 | ||
1f129fef | 2265 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2266 | goto out; |
2267 | ||
5870adc6 | 2268 | ret = true; |
59b699cd AQ |
2269 | |
2270 | out: | |
2271 | if (tt_global_entry) | |
a513088d | 2272 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2273 | if (tt_local_entry) |
a513088d | 2274 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2275 | return ret; |
2276 | } | |
a943cac1 | 2277 | |
56303d34 SE |
2278 | void batadv_tt_update_orig(struct batadv_priv *bat_priv, |
2279 | struct batadv_orig_node *orig_node, | |
08c36d3e SE |
2280 | const unsigned char *tt_buff, uint8_t tt_num_changes, |
2281 | uint8_t ttvn, uint16_t tt_crc) | |
a943cac1 ML |
2282 | { |
2283 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2284 | bool full_table = true; | |
96412690 | 2285 | struct batadv_tt_change *tt_change; |
a943cac1 | 2286 | |
20ff9d59 | 2287 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2288 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2289 | return; |
2290 | ||
17071578 | 2291 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2292 | * increased by one -> we can apply the attached changes |
2293 | */ | |
17071578 AQ |
2294 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2295 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2296 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2297 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2298 | * times. | |
9cfc7bd6 SE |
2299 | * In this case send a tt request |
2300 | */ | |
a943cac1 ML |
2301 | if (!tt_num_changes) { |
2302 | full_table = false; | |
2303 | goto request_table; | |
2304 | } | |
2305 | ||
96412690 | 2306 | tt_change = (struct batadv_tt_change *)tt_buff; |
a513088d | 2307 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2308 | ttvn, tt_change); |
a943cac1 ML |
2309 | |
2310 | /* Even if we received the precomputed crc with the OGM, we | |
2311 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2312 | * in the global table |
2313 | */ | |
a513088d | 2314 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2315 | |
2316 | /* The ttvn alone is not enough to guarantee consistency | |
2317 | * because a single value could represent different states | |
2318 | * (due to the wrap around). Thus a node has to check whether | |
2319 | * the resulting table (after applying the changes) is still | |
2320 | * consistent or not. E.g. a node could disconnect while its | |
2321 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2322 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2323 | * inconsistency |
2324 | */ | |
a943cac1 ML |
2325 | if (orig_node->tt_crc != tt_crc) |
2326 | goto request_table; | |
2327 | ||
2328 | /* Roaming phase is over: tables are in sync again. I can | |
9cfc7bd6 SE |
2329 | * unset the flag |
2330 | */ | |
a943cac1 ML |
2331 | orig_node->tt_poss_change = false; |
2332 | } else { | |
2333 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2334 | * in sync anymore -> request fresh tt data |
2335 | */ | |
17071578 AQ |
2336 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2337 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2338 | request_table: |
39c75a51 | 2339 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2340 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %u last_crc: %u num_changes: %u)\n", |
2341 | orig_node->orig, ttvn, orig_ttvn, tt_crc, | |
2342 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2343 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2344 | tt_crc, full_table); | |
a943cac1 ML |
2345 | return; |
2346 | } | |
2347 | } | |
2348 | } | |
3275e7cc AQ |
2349 | |
2350 | /* returns true whether we know that the client has moved from its old | |
2351 | * originator to another one. This entry is kept is still kept for consistency | |
2352 | * purposes | |
2353 | */ | |
56303d34 | 2354 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
08c36d3e | 2355 | uint8_t *addr) |
3275e7cc | 2356 | { |
56303d34 | 2357 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2358 | bool ret = false; |
2359 | ||
a513088d | 2360 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2361 | if (!tt_global_entry) |
2362 | goto out; | |
2363 | ||
acd34afa | 2364 | ret = tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM; |
a513088d | 2365 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2366 | out: |
2367 | return ret; | |
2368 | } |