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); |
30cfd02b AQ |
37 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
38 | struct batadv_orig_node *orig_node, | |
39 | const unsigned char *addr, | |
40 | const char *message, bool roaming); | |
c6c8fea2 | 41 | |
7aadf889 | 42 | /* returns 1 if they are the same mac addr */ |
a513088d | 43 | static int batadv_compare_tt(const struct hlist_node *node, const void *data2) |
7aadf889 | 44 | { |
56303d34 | 45 | const void *data1 = container_of(node, struct batadv_tt_common_entry, |
747e4221 | 46 | hash_entry); |
7aadf889 ML |
47 | |
48 | return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); | |
49 | } | |
50 | ||
56303d34 | 51 | static void batadv_tt_start_timer(struct batadv_priv *bat_priv) |
c6c8fea2 | 52 | { |
807736f6 SE |
53 | INIT_DELAYED_WORK(&bat_priv->tt.work, batadv_tt_purge); |
54 | queue_delayed_work(batadv_event_workqueue, &bat_priv->tt.work, | |
a73105b8 | 55 | msecs_to_jiffies(5000)); |
c6c8fea2 SE |
56 | } |
57 | ||
56303d34 | 58 | static struct batadv_tt_common_entry * |
5bf74e9c | 59 | batadv_tt_hash_find(struct batadv_hashtable *hash, const void *data) |
7aadf889 | 60 | { |
7aadf889 ML |
61 | struct hlist_head *head; |
62 | struct hlist_node *node; | |
56303d34 SE |
63 | struct batadv_tt_common_entry *tt_common_entry; |
64 | struct batadv_tt_common_entry *tt_common_entry_tmp = NULL; | |
c90681b8 | 65 | uint32_t index; |
7aadf889 ML |
66 | |
67 | if (!hash) | |
68 | return NULL; | |
69 | ||
da641193 | 70 | index = batadv_choose_orig(data, hash->size); |
7aadf889 ML |
71 | head = &hash->table[index]; |
72 | ||
73 | rcu_read_lock(); | |
48100bac | 74 | hlist_for_each_entry_rcu(tt_common_entry, node, head, hash_entry) { |
1eda58bf | 75 | if (!batadv_compare_eth(tt_common_entry, data)) |
7aadf889 ML |
76 | continue; |
77 | ||
48100bac | 78 | if (!atomic_inc_not_zero(&tt_common_entry->refcount)) |
7683fdc1 AQ |
79 | continue; |
80 | ||
48100bac | 81 | tt_common_entry_tmp = tt_common_entry; |
7aadf889 ML |
82 | break; |
83 | } | |
84 | rcu_read_unlock(); | |
85 | ||
48100bac | 86 | return tt_common_entry_tmp; |
7aadf889 ML |
87 | } |
88 | ||
56303d34 SE |
89 | static struct batadv_tt_local_entry * |
90 | batadv_tt_local_hash_find(struct batadv_priv *bat_priv, const void *data) | |
7aadf889 | 91 | { |
56303d34 SE |
92 | struct batadv_tt_common_entry *tt_common_entry; |
93 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
7aadf889 | 94 | |
807736f6 | 95 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.local_hash, data); |
48100bac AQ |
96 | if (tt_common_entry) |
97 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
98 | struct batadv_tt_local_entry, |
99 | common); | |
48100bac AQ |
100 | return tt_local_entry; |
101 | } | |
7aadf889 | 102 | |
56303d34 SE |
103 | static struct batadv_tt_global_entry * |
104 | batadv_tt_global_hash_find(struct batadv_priv *bat_priv, const void *data) | |
48100bac | 105 | { |
56303d34 SE |
106 | struct batadv_tt_common_entry *tt_common_entry; |
107 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
7683fdc1 | 108 | |
807736f6 | 109 | tt_common_entry = batadv_tt_hash_find(bat_priv->tt.global_hash, data); |
48100bac AQ |
110 | if (tt_common_entry) |
111 | tt_global_entry = container_of(tt_common_entry, | |
56303d34 SE |
112 | struct batadv_tt_global_entry, |
113 | common); | |
48100bac | 114 | return tt_global_entry; |
7aadf889 | 115 | |
7aadf889 ML |
116 | } |
117 | ||
a513088d | 118 | static void |
56303d34 | 119 | batadv_tt_local_entry_free_ref(struct batadv_tt_local_entry *tt_local_entry) |
7683fdc1 | 120 | { |
48100bac AQ |
121 | if (atomic_dec_and_test(&tt_local_entry->common.refcount)) |
122 | kfree_rcu(tt_local_entry, common.rcu); | |
7683fdc1 AQ |
123 | } |
124 | ||
a513088d | 125 | static void batadv_tt_global_entry_free_rcu(struct rcu_head *rcu) |
531027fc | 126 | { |
56303d34 SE |
127 | struct batadv_tt_common_entry *tt_common_entry; |
128 | struct batadv_tt_global_entry *tt_global_entry; | |
531027fc | 129 | |
56303d34 SE |
130 | tt_common_entry = container_of(rcu, struct batadv_tt_common_entry, rcu); |
131 | tt_global_entry = container_of(tt_common_entry, | |
132 | struct batadv_tt_global_entry, common); | |
531027fc | 133 | |
531027fc SW |
134 | kfree(tt_global_entry); |
135 | } | |
136 | ||
a513088d | 137 | static void |
56303d34 | 138 | batadv_tt_global_entry_free_ref(struct batadv_tt_global_entry *tt_global_entry) |
7683fdc1 | 139 | { |
db08e6e5 | 140 | if (atomic_dec_and_test(&tt_global_entry->common.refcount)) { |
a513088d | 141 | batadv_tt_global_del_orig_list(tt_global_entry); |
48100bac | 142 | call_rcu(&tt_global_entry->common.rcu, |
a513088d | 143 | batadv_tt_global_entry_free_rcu); |
db08e6e5 SW |
144 | } |
145 | } | |
146 | ||
a513088d | 147 | static void batadv_tt_orig_list_entry_free_rcu(struct rcu_head *rcu) |
db08e6e5 | 148 | { |
56303d34 | 149 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 150 | |
56303d34 | 151 | orig_entry = container_of(rcu, struct batadv_tt_orig_list_entry, rcu); |
7d211efc | 152 | batadv_orig_node_free_ref(orig_entry->orig_node); |
db08e6e5 SW |
153 | kfree(orig_entry); |
154 | } | |
155 | ||
a513088d | 156 | static void |
56303d34 | 157 | batadv_tt_orig_list_entry_free_ref(struct batadv_tt_orig_list_entry *orig_entry) |
db08e6e5 | 158 | { |
d657e621 AQ |
159 | if (!atomic_dec_and_test(&orig_entry->refcount)) |
160 | return; | |
29cb99de AQ |
161 | /* to avoid race conditions, immediately decrease the tt counter */ |
162 | atomic_dec(&orig_entry->orig_node->tt_size); | |
a513088d | 163 | call_rcu(&orig_entry->rcu, batadv_tt_orig_list_entry_free_rcu); |
7683fdc1 AQ |
164 | } |
165 | ||
56303d34 | 166 | static void batadv_tt_local_event(struct batadv_priv *bat_priv, |
a513088d | 167 | const uint8_t *addr, uint8_t flags) |
a73105b8 | 168 | { |
56303d34 | 169 | struct batadv_tt_change_node *tt_change_node, *entry, *safe; |
3b643de5 AQ |
170 | bool event_removed = false; |
171 | bool del_op_requested, del_op_entry; | |
a73105b8 AQ |
172 | |
173 | tt_change_node = kmalloc(sizeof(*tt_change_node), GFP_ATOMIC); | |
174 | ||
175 | if (!tt_change_node) | |
176 | return; | |
177 | ||
ff66c975 | 178 | tt_change_node->change.flags = flags; |
a73105b8 AQ |
179 | memcpy(tt_change_node->change.addr, addr, ETH_ALEN); |
180 | ||
acd34afa | 181 | del_op_requested = flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
182 | |
183 | /* check for ADD+DEL or DEL+ADD events */ | |
807736f6 SE |
184 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
185 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, | |
3b643de5 AQ |
186 | list) { |
187 | if (!batadv_compare_eth(entry->change.addr, addr)) | |
188 | continue; | |
189 | ||
190 | /* DEL+ADD in the same orig interval have no effect and can be | |
191 | * removed to avoid silly behaviour on the receiver side. The | |
192 | * other way around (ADD+DEL) can happen in case of roaming of | |
193 | * a client still in the NEW state. Roaming of NEW clients is | |
194 | * now possible due to automatically recognition of "temporary" | |
195 | * clients | |
196 | */ | |
acd34afa | 197 | del_op_entry = entry->change.flags & BATADV_TT_CLIENT_DEL; |
3b643de5 AQ |
198 | if (!del_op_requested && del_op_entry) |
199 | goto del; | |
200 | if (del_op_requested && !del_op_entry) | |
201 | goto del; | |
202 | continue; | |
203 | del: | |
204 | list_del(&entry->list); | |
205 | kfree(entry); | |
155e4e12 | 206 | kfree(tt_change_node); |
3b643de5 AQ |
207 | event_removed = true; |
208 | goto unlock; | |
209 | } | |
210 | ||
a73105b8 | 211 | /* track the change in the OGMinterval list */ |
807736f6 | 212 | list_add_tail(&tt_change_node->list, &bat_priv->tt.changes_list); |
3b643de5 AQ |
213 | |
214 | unlock: | |
807736f6 | 215 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 | 216 | |
3b643de5 | 217 | if (event_removed) |
807736f6 | 218 | atomic_dec(&bat_priv->tt.local_changes); |
3b643de5 | 219 | else |
807736f6 | 220 | atomic_inc(&bat_priv->tt.local_changes); |
a73105b8 AQ |
221 | } |
222 | ||
08c36d3e | 223 | int batadv_tt_len(int changes_num) |
a73105b8 | 224 | { |
96412690 | 225 | return changes_num * sizeof(struct batadv_tt_change); |
a73105b8 AQ |
226 | } |
227 | ||
56303d34 | 228 | static int batadv_tt_local_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 229 | { |
807736f6 | 230 | if (bat_priv->tt.local_hash) |
5346c35e | 231 | return 0; |
c6c8fea2 | 232 | |
807736f6 | 233 | bat_priv->tt.local_hash = batadv_hash_new(1024); |
c6c8fea2 | 234 | |
807736f6 | 235 | if (!bat_priv->tt.local_hash) |
5346c35e | 236 | return -ENOMEM; |
c6c8fea2 | 237 | |
5346c35e | 238 | return 0; |
c6c8fea2 SE |
239 | } |
240 | ||
08c36d3e SE |
241 | void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, |
242 | int ifindex) | |
c6c8fea2 | 243 | { |
56303d34 SE |
244 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
245 | struct batadv_tt_local_entry *tt_local_entry = NULL; | |
246 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
db08e6e5 SW |
247 | struct hlist_head *head; |
248 | struct hlist_node *node; | |
56303d34 | 249 | struct batadv_tt_orig_list_entry *orig_entry; |
80b3f58c | 250 | int hash_added; |
c6c8fea2 | 251 | |
a513088d | 252 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
c6c8fea2 | 253 | |
2dafb49d AQ |
254 | if (tt_local_entry) { |
255 | tt_local_entry->last_seen = jiffies; | |
acd34afa SE |
256 | /* possibly unset the BATADV_TT_CLIENT_PENDING flag */ |
257 | tt_local_entry->common.flags &= ~BATADV_TT_CLIENT_PENDING; | |
7683fdc1 | 258 | goto out; |
c6c8fea2 SE |
259 | } |
260 | ||
704509b8 | 261 | tt_local_entry = kmalloc(sizeof(*tt_local_entry), GFP_ATOMIC); |
2dafb49d | 262 | if (!tt_local_entry) |
7683fdc1 | 263 | goto out; |
a73105b8 | 264 | |
39c75a51 | 265 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 266 | "Creating new local tt entry: %pM (ttvn: %d)\n", addr, |
807736f6 | 267 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 268 | |
48100bac | 269 | memcpy(tt_local_entry->common.addr, addr, ETH_ALEN); |
42d0b044 | 270 | tt_local_entry->common.flags = BATADV_NO_FLAGS; |
9563877e | 271 | if (batadv_is_wifi_iface(ifindex)) |
acd34afa | 272 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_WIFI; |
48100bac AQ |
273 | atomic_set(&tt_local_entry->common.refcount, 2); |
274 | tt_local_entry->last_seen = jiffies; | |
30cfd02b | 275 | tt_local_entry->common.added_at = tt_local_entry->last_seen; |
c6c8fea2 SE |
276 | |
277 | /* the batman interface mac address should never be purged */ | |
1eda58bf | 278 | if (batadv_compare_eth(addr, soft_iface->dev_addr)) |
acd34afa | 279 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_NOPURGE; |
c6c8fea2 | 280 | |
c40ed2bf AQ |
281 | /* The local entry has to be marked as NEW to avoid to send it in |
282 | * a full table response going out before the next ttvn increment | |
9cfc7bd6 SE |
283 | * (consistency check) |
284 | */ | |
acd34afa | 285 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_NEW; |
c40ed2bf | 286 | |
807736f6 | 287 | hash_added = batadv_hash_add(bat_priv->tt.local_hash, batadv_compare_tt, |
da641193 SE |
288 | batadv_choose_orig, |
289 | &tt_local_entry->common, | |
c0a55929 | 290 | &tt_local_entry->common.hash_entry); |
80b3f58c SW |
291 | |
292 | if (unlikely(hash_added != 0)) { | |
293 | /* remove the reference for the hash */ | |
a513088d | 294 | batadv_tt_local_entry_free_ref(tt_local_entry); |
80b3f58c SW |
295 | goto out; |
296 | } | |
297 | ||
a513088d | 298 | batadv_tt_local_event(bat_priv, addr, tt_local_entry->common.flags); |
ff66c975 | 299 | |
c6c8fea2 | 300 | /* remove address from global hash if present */ |
a513088d | 301 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
c6c8fea2 | 302 | |
cc47f66e AQ |
303 | /* Check whether it is a roaming! */ |
304 | if (tt_global_entry) { | |
db08e6e5 SW |
305 | /* These node are probably going to update their tt table */ |
306 | head = &tt_global_entry->orig_list; | |
307 | rcu_read_lock(); | |
308 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
309 | orig_entry->orig_node->tt_poss_change = true; | |
310 | ||
a513088d SE |
311 | batadv_send_roam_adv(bat_priv, |
312 | tt_global_entry->common.addr, | |
313 | orig_entry->orig_node); | |
db08e6e5 SW |
314 | } |
315 | rcu_read_unlock(); | |
316 | /* The global entry has to be marked as ROAMING and | |
317 | * has to be kept for consistency purpose | |
318 | */ | |
acd34afa | 319 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
03fc3070 | 320 | tt_global_entry->roam_at = jiffies; |
7683fdc1 AQ |
321 | } |
322 | out: | |
323 | if (tt_local_entry) | |
a513088d | 324 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 325 | if (tt_global_entry) |
a513088d | 326 | batadv_tt_global_entry_free_ref(tt_global_entry); |
c6c8fea2 SE |
327 | } |
328 | ||
a513088d SE |
329 | static void batadv_tt_realloc_packet_buff(unsigned char **packet_buff, |
330 | int *packet_buff_len, | |
331 | int min_packet_len, | |
332 | int new_packet_len) | |
be9aa4c1 ML |
333 | { |
334 | unsigned char *new_buff; | |
335 | ||
336 | new_buff = kmalloc(new_packet_len, GFP_ATOMIC); | |
337 | ||
338 | /* keep old buffer if kmalloc should fail */ | |
339 | if (new_buff) { | |
340 | memcpy(new_buff, *packet_buff, min_packet_len); | |
341 | kfree(*packet_buff); | |
342 | *packet_buff = new_buff; | |
343 | *packet_buff_len = new_packet_len; | |
344 | } | |
345 | } | |
346 | ||
56303d34 | 347 | static void batadv_tt_prepare_packet_buff(struct batadv_priv *bat_priv, |
a513088d SE |
348 | unsigned char **packet_buff, |
349 | int *packet_buff_len, | |
350 | int min_packet_len) | |
be9aa4c1 | 351 | { |
56303d34 | 352 | struct batadv_hard_iface *primary_if; |
be9aa4c1 ML |
353 | int req_len; |
354 | ||
e5d89254 | 355 | primary_if = batadv_primary_if_get_selected(bat_priv); |
be9aa4c1 ML |
356 | |
357 | req_len = min_packet_len; | |
807736f6 | 358 | req_len += batadv_tt_len(atomic_read(&bat_priv->tt.local_changes)); |
be9aa4c1 ML |
359 | |
360 | /* if we have too many changes for one packet don't send any | |
361 | * and wait for the tt table request which will be fragmented | |
362 | */ | |
363 | if ((!primary_if) || (req_len > primary_if->soft_iface->mtu)) | |
364 | req_len = min_packet_len; | |
365 | ||
a513088d SE |
366 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
367 | min_packet_len, req_len); | |
be9aa4c1 ML |
368 | |
369 | if (primary_if) | |
e5d89254 | 370 | batadv_hardif_free_ref(primary_if); |
be9aa4c1 ML |
371 | } |
372 | ||
56303d34 | 373 | static int batadv_tt_changes_fill_buff(struct batadv_priv *bat_priv, |
a513088d SE |
374 | unsigned char **packet_buff, |
375 | int *packet_buff_len, | |
376 | int min_packet_len) | |
c6c8fea2 | 377 | { |
56303d34 | 378 | struct batadv_tt_change_node *entry, *safe; |
be9aa4c1 ML |
379 | int count = 0, tot_changes = 0, new_len; |
380 | unsigned char *tt_buff; | |
381 | ||
a513088d SE |
382 | batadv_tt_prepare_packet_buff(bat_priv, packet_buff, |
383 | packet_buff_len, min_packet_len); | |
c6c8fea2 | 384 | |
be9aa4c1 ML |
385 | new_len = *packet_buff_len - min_packet_len; |
386 | tt_buff = *packet_buff + min_packet_len; | |
387 | ||
388 | if (new_len > 0) | |
08c36d3e | 389 | tot_changes = new_len / batadv_tt_len(1); |
c6c8fea2 | 390 | |
807736f6 SE |
391 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
392 | atomic_set(&bat_priv->tt.local_changes, 0); | |
c6c8fea2 | 393 | |
807736f6 | 394 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
7c64fd98 | 395 | list) { |
a73105b8 | 396 | if (count < tot_changes) { |
08c36d3e | 397 | memcpy(tt_buff + batadv_tt_len(count), |
96412690 | 398 | &entry->change, sizeof(struct batadv_tt_change)); |
c6c8fea2 SE |
399 | count++; |
400 | } | |
a73105b8 AQ |
401 | list_del(&entry->list); |
402 | kfree(entry); | |
c6c8fea2 | 403 | } |
807736f6 | 404 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); |
a73105b8 AQ |
405 | |
406 | /* Keep the buffer for possible tt_request */ | |
807736f6 SE |
407 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
408 | kfree(bat_priv->tt.last_changeset); | |
409 | bat_priv->tt.last_changeset_len = 0; | |
410 | bat_priv->tt.last_changeset = NULL; | |
be9aa4c1 ML |
411 | /* check whether this new OGM has no changes due to size problems */ |
412 | if (new_len > 0) { | |
413 | /* if kmalloc() fails we will reply with the full table | |
a73105b8 AQ |
414 | * instead of providing the diff |
415 | */ | |
807736f6 SE |
416 | bat_priv->tt.last_changeset = kmalloc(new_len, GFP_ATOMIC); |
417 | if (bat_priv->tt.last_changeset) { | |
418 | memcpy(bat_priv->tt.last_changeset, tt_buff, new_len); | |
419 | bat_priv->tt.last_changeset_len = new_len; | |
a73105b8 AQ |
420 | } |
421 | } | |
807736f6 | 422 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
c6c8fea2 | 423 | |
08ad76ec | 424 | return count; |
c6c8fea2 SE |
425 | } |
426 | ||
08c36d3e | 427 | int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
428 | { |
429 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 430 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 431 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
432 | struct batadv_tt_common_entry *tt_common_entry; |
433 | struct batadv_hard_iface *primary_if; | |
7aadf889 | 434 | struct hlist_node *node; |
c6c8fea2 | 435 | struct hlist_head *head; |
c90681b8 | 436 | uint32_t i; |
c6c8fea2 | 437 | |
30da63a6 ML |
438 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
439 | if (!primary_if) | |
32ae9b22 | 440 | goto out; |
c6c8fea2 | 441 | |
86ceb360 SE |
442 | seq_printf(seq, |
443 | "Locally retrieved addresses (from %s) announced via TT (TTVN: %u):\n", | |
807736f6 | 444 | net_dev->name, (uint8_t)atomic_read(&bat_priv->tt.vn)); |
c6c8fea2 | 445 | |
c6c8fea2 SE |
446 | for (i = 0; i < hash->size; i++) { |
447 | head = &hash->table[i]; | |
448 | ||
7aadf889 | 449 | rcu_read_lock(); |
48100bac | 450 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 451 | head, hash_entry) { |
d099c2c5 | 452 | seq_printf(seq, " * %pM [%c%c%c%c%c]\n", |
7c64fd98 SE |
453 | tt_common_entry->addr, |
454 | (tt_common_entry->flags & | |
acd34afa | 455 | BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
7c64fd98 | 456 | (tt_common_entry->flags & |
acd34afa | 457 | BATADV_TT_CLIENT_NOPURGE ? 'P' : '.'), |
7c64fd98 | 458 | (tt_common_entry->flags & |
acd34afa | 459 | BATADV_TT_CLIENT_NEW ? 'N' : '.'), |
7c64fd98 | 460 | (tt_common_entry->flags & |
acd34afa | 461 | BATADV_TT_CLIENT_PENDING ? 'X' : '.'), |
7c64fd98 | 462 | (tt_common_entry->flags & |
acd34afa | 463 | BATADV_TT_CLIENT_WIFI ? 'W' : '.')); |
c6c8fea2 | 464 | } |
7aadf889 | 465 | rcu_read_unlock(); |
c6c8fea2 | 466 | } |
32ae9b22 ML |
467 | out: |
468 | if (primary_if) | |
e5d89254 | 469 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 470 | return 0; |
c6c8fea2 SE |
471 | } |
472 | ||
56303d34 SE |
473 | static void |
474 | batadv_tt_local_set_pending(struct batadv_priv *bat_priv, | |
475 | struct batadv_tt_local_entry *tt_local_entry, | |
476 | uint16_t flags, const char *message) | |
c6c8fea2 | 477 | { |
a513088d SE |
478 | batadv_tt_local_event(bat_priv, tt_local_entry->common.addr, |
479 | tt_local_entry->common.flags | flags); | |
a73105b8 | 480 | |
015758d0 AQ |
481 | /* The local client has to be marked as "pending to be removed" but has |
482 | * to be kept in the table in order to send it in a full table | |
9cfc7bd6 SE |
483 | * response issued before the net ttvn increment (consistency check) |
484 | */ | |
acd34afa | 485 | tt_local_entry->common.flags |= BATADV_TT_CLIENT_PENDING; |
c566dbbe | 486 | |
39c75a51 | 487 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
488 | "Local tt entry (%pM) pending to be removed: %s\n", |
489 | tt_local_entry->common.addr, message); | |
c6c8fea2 SE |
490 | } |
491 | ||
7f91d06c AQ |
492 | /** |
493 | * batadv_tt_local_remove - logically remove an entry from the local table | |
494 | * @bat_priv: the bat priv with all the soft interface information | |
495 | * @addr: the MAC address of the client to remove | |
496 | * @message: message to append to the log on deletion | |
497 | * @roaming: true if the deletion is due to a roaming event | |
498 | * | |
499 | * Returns the flags assigned to the local entry before being deleted | |
500 | */ | |
501 | uint16_t batadv_tt_local_remove(struct batadv_priv *bat_priv, | |
502 | const uint8_t *addr, const char *message, | |
503 | bool roaming) | |
c6c8fea2 | 504 | { |
56303d34 | 505 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
7f91d06c | 506 | uint16_t flags, curr_flags = BATADV_NO_FLAGS; |
c6c8fea2 | 507 | |
a513088d | 508 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
509 | if (!tt_local_entry) |
510 | goto out; | |
511 | ||
7f91d06c AQ |
512 | curr_flags = tt_local_entry->common.flags; |
513 | ||
acd34afa | 514 | flags = BATADV_TT_CLIENT_DEL; |
42d0b044 | 515 | if (roaming) |
acd34afa | 516 | flags |= BATADV_TT_CLIENT_ROAM; |
42d0b044 SE |
517 | |
518 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, flags, message); | |
7f91d06c | 519 | |
7683fdc1 AQ |
520 | out: |
521 | if (tt_local_entry) | |
a513088d | 522 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7f91d06c AQ |
523 | |
524 | return curr_flags; | |
c6c8fea2 SE |
525 | } |
526 | ||
56303d34 | 527 | static void batadv_tt_local_purge_list(struct batadv_priv *bat_priv, |
acd34afa | 528 | struct hlist_head *head) |
c6c8fea2 | 529 | { |
56303d34 SE |
530 | struct batadv_tt_local_entry *tt_local_entry; |
531 | struct batadv_tt_common_entry *tt_common_entry; | |
7aadf889 | 532 | struct hlist_node *node, *node_tmp; |
acd34afa SE |
533 | |
534 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, head, | |
535 | hash_entry) { | |
536 | tt_local_entry = container_of(tt_common_entry, | |
56303d34 SE |
537 | struct batadv_tt_local_entry, |
538 | common); | |
acd34afa SE |
539 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_NOPURGE) |
540 | continue; | |
541 | ||
542 | /* entry already marked for deletion */ | |
543 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) | |
544 | continue; | |
545 | ||
546 | if (!batadv_has_timed_out(tt_local_entry->last_seen, | |
547 | BATADV_TT_LOCAL_TIMEOUT)) | |
548 | continue; | |
549 | ||
550 | batadv_tt_local_set_pending(bat_priv, tt_local_entry, | |
551 | BATADV_TT_CLIENT_DEL, "timed out"); | |
552 | } | |
553 | } | |
554 | ||
56303d34 | 555 | static void batadv_tt_local_purge(struct batadv_priv *bat_priv) |
acd34afa | 556 | { |
807736f6 | 557 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
c6c8fea2 | 558 | struct hlist_head *head; |
7683fdc1 | 559 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 560 | uint32_t i; |
c6c8fea2 | 561 | |
c6c8fea2 SE |
562 | for (i = 0; i < hash->size; i++) { |
563 | head = &hash->table[i]; | |
7683fdc1 | 564 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 565 | |
7683fdc1 | 566 | spin_lock_bh(list_lock); |
acd34afa | 567 | batadv_tt_local_purge_list(bat_priv, head); |
7683fdc1 | 568 | spin_unlock_bh(list_lock); |
c6c8fea2 SE |
569 | } |
570 | ||
c6c8fea2 SE |
571 | } |
572 | ||
56303d34 | 573 | static void batadv_tt_local_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 574 | { |
5bf74e9c | 575 | struct batadv_hashtable *hash; |
a73105b8 | 576 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
577 | struct batadv_tt_common_entry *tt_common_entry; |
578 | struct batadv_tt_local_entry *tt_local; | |
7683fdc1 AQ |
579 | struct hlist_node *node, *node_tmp; |
580 | struct hlist_head *head; | |
c90681b8 | 581 | uint32_t i; |
a73105b8 | 582 | |
807736f6 | 583 | if (!bat_priv->tt.local_hash) |
c6c8fea2 SE |
584 | return; |
585 | ||
807736f6 | 586 | hash = bat_priv->tt.local_hash; |
a73105b8 AQ |
587 | |
588 | for (i = 0; i < hash->size; i++) { | |
589 | head = &hash->table[i]; | |
590 | list_lock = &hash->list_locks[i]; | |
591 | ||
592 | spin_lock_bh(list_lock); | |
48100bac | 593 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
a73105b8 AQ |
594 | head, hash_entry) { |
595 | hlist_del_rcu(node); | |
56303d34 SE |
596 | tt_local = container_of(tt_common_entry, |
597 | struct batadv_tt_local_entry, | |
598 | common); | |
599 | batadv_tt_local_entry_free_ref(tt_local); | |
a73105b8 AQ |
600 | } |
601 | spin_unlock_bh(list_lock); | |
602 | } | |
603 | ||
1a8eaf07 | 604 | batadv_hash_destroy(hash); |
a73105b8 | 605 | |
807736f6 | 606 | bat_priv->tt.local_hash = NULL; |
c6c8fea2 SE |
607 | } |
608 | ||
56303d34 | 609 | static int batadv_tt_global_init(struct batadv_priv *bat_priv) |
c6c8fea2 | 610 | { |
807736f6 | 611 | if (bat_priv->tt.global_hash) |
5346c35e | 612 | return 0; |
c6c8fea2 | 613 | |
807736f6 | 614 | bat_priv->tt.global_hash = batadv_hash_new(1024); |
c6c8fea2 | 615 | |
807736f6 | 616 | if (!bat_priv->tt.global_hash) |
5346c35e | 617 | return -ENOMEM; |
c6c8fea2 | 618 | |
5346c35e | 619 | return 0; |
c6c8fea2 SE |
620 | } |
621 | ||
56303d34 | 622 | static void batadv_tt_changes_list_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 623 | { |
56303d34 | 624 | struct batadv_tt_change_node *entry, *safe; |
c6c8fea2 | 625 | |
807736f6 | 626 | spin_lock_bh(&bat_priv->tt.changes_list_lock); |
c6c8fea2 | 627 | |
807736f6 | 628 | list_for_each_entry_safe(entry, safe, &bat_priv->tt.changes_list, |
a73105b8 AQ |
629 | list) { |
630 | list_del(&entry->list); | |
631 | kfree(entry); | |
632 | } | |
c6c8fea2 | 633 | |
807736f6 SE |
634 | atomic_set(&bat_priv->tt.local_changes, 0); |
635 | spin_unlock_bh(&bat_priv->tt.changes_list_lock); | |
a73105b8 | 636 | } |
c6c8fea2 | 637 | |
d657e621 AQ |
638 | /* retrieves the orig_tt_list_entry belonging to orig_node from the |
639 | * batadv_tt_global_entry list | |
640 | * | |
641 | * returns it with an increased refcounter, NULL if not found | |
db08e6e5 | 642 | */ |
d657e621 AQ |
643 | static struct batadv_tt_orig_list_entry * |
644 | batadv_tt_global_orig_entry_find(const struct batadv_tt_global_entry *entry, | |
645 | const struct batadv_orig_node *orig_node) | |
db08e6e5 | 646 | { |
d657e621 | 647 | struct batadv_tt_orig_list_entry *tmp_orig_entry, *orig_entry = NULL; |
db08e6e5 SW |
648 | const struct hlist_head *head; |
649 | struct hlist_node *node; | |
db08e6e5 SW |
650 | |
651 | rcu_read_lock(); | |
652 | head = &entry->orig_list; | |
653 | hlist_for_each_entry_rcu(tmp_orig_entry, node, head, list) { | |
d657e621 AQ |
654 | if (tmp_orig_entry->orig_node != orig_node) |
655 | continue; | |
656 | if (!atomic_inc_not_zero(&tmp_orig_entry->refcount)) | |
657 | continue; | |
658 | ||
659 | orig_entry = tmp_orig_entry; | |
660 | break; | |
db08e6e5 SW |
661 | } |
662 | rcu_read_unlock(); | |
d657e621 AQ |
663 | |
664 | return orig_entry; | |
665 | } | |
666 | ||
667 | /* find out if an orig_node is already in the list of a tt_global_entry. | |
668 | * returns true if found, false otherwise | |
669 | */ | |
670 | static bool | |
671 | batadv_tt_global_entry_has_orig(const struct batadv_tt_global_entry *entry, | |
672 | const struct batadv_orig_node *orig_node) | |
673 | { | |
674 | struct batadv_tt_orig_list_entry *orig_entry; | |
675 | bool found = false; | |
676 | ||
677 | orig_entry = batadv_tt_global_orig_entry_find(entry, orig_node); | |
678 | if (orig_entry) { | |
679 | found = true; | |
680 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
681 | } | |
682 | ||
db08e6e5 SW |
683 | return found; |
684 | } | |
685 | ||
a513088d | 686 | static void |
d657e621 | 687 | batadv_tt_global_orig_entry_add(struct batadv_tt_global_entry *tt_global, |
56303d34 | 688 | struct batadv_orig_node *orig_node, int ttvn) |
db08e6e5 | 689 | { |
56303d34 | 690 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 691 | |
d657e621 | 692 | orig_entry = batadv_tt_global_orig_entry_find(tt_global, orig_node); |
30cfd02b AQ |
693 | if (orig_entry) { |
694 | /* refresh the ttvn: the current value could be a bogus one that | |
695 | * was added during a "temporary client detection" | |
696 | */ | |
697 | orig_entry->ttvn = ttvn; | |
d657e621 | 698 | goto out; |
30cfd02b | 699 | } |
d657e621 | 700 | |
db08e6e5 SW |
701 | orig_entry = kzalloc(sizeof(*orig_entry), GFP_ATOMIC); |
702 | if (!orig_entry) | |
d657e621 | 703 | goto out; |
db08e6e5 SW |
704 | |
705 | INIT_HLIST_NODE(&orig_entry->list); | |
706 | atomic_inc(&orig_node->refcount); | |
707 | atomic_inc(&orig_node->tt_size); | |
708 | orig_entry->orig_node = orig_node; | |
709 | orig_entry->ttvn = ttvn; | |
d657e621 | 710 | atomic_set(&orig_entry->refcount, 2); |
db08e6e5 | 711 | |
d657e621 | 712 | spin_lock_bh(&tt_global->list_lock); |
db08e6e5 | 713 | hlist_add_head_rcu(&orig_entry->list, |
d657e621 AQ |
714 | &tt_global->orig_list); |
715 | spin_unlock_bh(&tt_global->list_lock); | |
716 | out: | |
717 | if (orig_entry) | |
718 | batadv_tt_orig_list_entry_free_ref(orig_entry); | |
db08e6e5 SW |
719 | } |
720 | ||
a73105b8 | 721 | /* caller must hold orig_node refcount */ |
56303d34 SE |
722 | int batadv_tt_global_add(struct batadv_priv *bat_priv, |
723 | struct batadv_orig_node *orig_node, | |
d4f44692 AQ |
724 | const unsigned char *tt_addr, uint8_t flags, |
725 | uint8_t ttvn) | |
a73105b8 | 726 | { |
56303d34 | 727 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
7683fdc1 | 728 | int ret = 0; |
80b3f58c | 729 | int hash_added; |
56303d34 | 730 | struct batadv_tt_common_entry *common; |
7f91d06c | 731 | uint16_t local_flags; |
c6c8fea2 | 732 | |
a513088d | 733 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, tt_addr); |
a73105b8 AQ |
734 | |
735 | if (!tt_global_entry) { | |
d4f44692 | 736 | tt_global_entry = kzalloc(sizeof(*tt_global_entry), GFP_ATOMIC); |
a73105b8 | 737 | if (!tt_global_entry) |
7683fdc1 AQ |
738 | goto out; |
739 | ||
c0a55929 SE |
740 | common = &tt_global_entry->common; |
741 | memcpy(common->addr, tt_addr, ETH_ALEN); | |
db08e6e5 | 742 | |
d4f44692 | 743 | common->flags = flags; |
cc47f66e | 744 | tt_global_entry->roam_at = 0; |
fdf79320 AQ |
745 | /* node must store current time in case of roaming. This is |
746 | * needed to purge this entry out on timeout (if nobody claims | |
747 | * it) | |
748 | */ | |
749 | if (flags & BATADV_TT_CLIENT_ROAM) | |
750 | tt_global_entry->roam_at = jiffies; | |
c0a55929 | 751 | atomic_set(&common->refcount, 2); |
30cfd02b | 752 | common->added_at = jiffies; |
db08e6e5 SW |
753 | |
754 | INIT_HLIST_HEAD(&tt_global_entry->orig_list); | |
755 | spin_lock_init(&tt_global_entry->list_lock); | |
7683fdc1 | 756 | |
807736f6 | 757 | hash_added = batadv_hash_add(bat_priv->tt.global_hash, |
a513088d SE |
758 | batadv_compare_tt, |
759 | batadv_choose_orig, common, | |
760 | &common->hash_entry); | |
80b3f58c SW |
761 | |
762 | if (unlikely(hash_added != 0)) { | |
763 | /* remove the reference for the hash */ | |
a513088d | 764 | batadv_tt_global_entry_free_ref(tt_global_entry); |
80b3f58c SW |
765 | goto out_remove; |
766 | } | |
a73105b8 | 767 | } else { |
30cfd02b AQ |
768 | /* If there is already a global entry, we can use this one for |
769 | * our processing. | |
770 | * But if we are trying to add a temporary client we can exit | |
771 | * directly because the temporary information should never | |
772 | * override any already known client state (whatever it is) | |
773 | */ | |
774 | if (flags & BATADV_TT_CLIENT_TEMP) | |
775 | goto out; | |
776 | ||
777 | /* if the client was temporary added before receiving the first | |
778 | * OGM announcing it, we have to clear the TEMP flag | |
779 | */ | |
780 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_TEMP; | |
db08e6e5 | 781 | |
acd34afa SE |
782 | /* If there is the BATADV_TT_CLIENT_ROAM flag set, there is only |
783 | * one originator left in the list and we previously received a | |
db08e6e5 SW |
784 | * delete + roaming change for this originator. |
785 | * | |
786 | * We should first delete the old originator before adding the | |
787 | * new one. | |
788 | */ | |
acd34afa | 789 | if (tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM) { |
a513088d | 790 | batadv_tt_global_del_orig_list(tt_global_entry); |
acd34afa | 791 | tt_global_entry->common.flags &= ~BATADV_TT_CLIENT_ROAM; |
db08e6e5 | 792 | tt_global_entry->roam_at = 0; |
a73105b8 AQ |
793 | } |
794 | } | |
30cfd02b | 795 | /* add the new orig_entry (if needed) or update it */ |
d657e621 | 796 | batadv_tt_global_orig_entry_add(tt_global_entry, orig_node, ttvn); |
c6c8fea2 | 797 | |
39c75a51 | 798 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
799 | "Creating new global tt entry: %pM (via %pM)\n", |
800 | tt_global_entry->common.addr, orig_node->orig); | |
c10dba05 | 801 | ret = 1; |
c6c8fea2 | 802 | |
80b3f58c | 803 | out_remove: |
7f91d06c | 804 | |
a73105b8 | 805 | /* remove address from local hash if present */ |
7f91d06c AQ |
806 | local_flags = batadv_tt_local_remove(bat_priv, tt_addr, |
807 | "global tt received", | |
808 | flags & BATADV_TT_CLIENT_ROAM); | |
809 | tt_global_entry->common.flags |= local_flags & BATADV_TT_CLIENT_WIFI; | |
810 | ||
7683fdc1 AQ |
811 | out: |
812 | if (tt_global_entry) | |
a513088d | 813 | batadv_tt_global_entry_free_ref(tt_global_entry); |
7683fdc1 | 814 | return ret; |
c6c8fea2 SE |
815 | } |
816 | ||
db08e6e5 SW |
817 | /* print all orig nodes who announce the address for this global entry. |
818 | * it is assumed that the caller holds rcu_read_lock(); | |
819 | */ | |
a513088d | 820 | static void |
56303d34 | 821 | batadv_tt_global_print_entry(struct batadv_tt_global_entry *tt_global_entry, |
a513088d | 822 | struct seq_file *seq) |
db08e6e5 SW |
823 | { |
824 | struct hlist_head *head; | |
825 | struct hlist_node *node; | |
56303d34 SE |
826 | struct batadv_tt_orig_list_entry *orig_entry; |
827 | struct batadv_tt_common_entry *tt_common_entry; | |
db08e6e5 SW |
828 | uint16_t flags; |
829 | uint8_t last_ttvn; | |
830 | ||
831 | tt_common_entry = &tt_global_entry->common; | |
832 | ||
833 | head = &tt_global_entry->orig_list; | |
834 | ||
835 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
836 | flags = tt_common_entry->flags; | |
837 | last_ttvn = atomic_read(&orig_entry->orig_node->last_ttvn); | |
30cfd02b | 838 | seq_printf(seq, " * %pM (%3u) via %pM (%3u) [%c%c%c]\n", |
db08e6e5 SW |
839 | tt_global_entry->common.addr, orig_entry->ttvn, |
840 | orig_entry->orig_node->orig, last_ttvn, | |
acd34afa | 841 | (flags & BATADV_TT_CLIENT_ROAM ? 'R' : '.'), |
30cfd02b AQ |
842 | (flags & BATADV_TT_CLIENT_WIFI ? 'W' : '.'), |
843 | (flags & BATADV_TT_CLIENT_TEMP ? 'T' : '.')); | |
db08e6e5 SW |
844 | } |
845 | } | |
846 | ||
08c36d3e | 847 | int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset) |
c6c8fea2 SE |
848 | { |
849 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 850 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 851 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
852 | struct batadv_tt_common_entry *tt_common_entry; |
853 | struct batadv_tt_global_entry *tt_global; | |
854 | struct batadv_hard_iface *primary_if; | |
7aadf889 | 855 | struct hlist_node *node; |
c6c8fea2 | 856 | struct hlist_head *head; |
c90681b8 | 857 | uint32_t i; |
c6c8fea2 | 858 | |
30da63a6 ML |
859 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
860 | if (!primary_if) | |
32ae9b22 | 861 | goto out; |
c6c8fea2 | 862 | |
2dafb49d AQ |
863 | seq_printf(seq, |
864 | "Globally announced TT entries received via the mesh %s\n", | |
c6c8fea2 | 865 | net_dev->name); |
df6edb9e AQ |
866 | seq_printf(seq, " %-13s %s %-15s %s %s\n", |
867 | "Client", "(TTVN)", "Originator", "(Curr TTVN)", "Flags"); | |
c6c8fea2 | 868 | |
c6c8fea2 SE |
869 | for (i = 0; i < hash->size; i++) { |
870 | head = &hash->table[i]; | |
871 | ||
7aadf889 | 872 | rcu_read_lock(); |
48100bac | 873 | hlist_for_each_entry_rcu(tt_common_entry, node, |
7aadf889 | 874 | head, hash_entry) { |
56303d34 SE |
875 | tt_global = container_of(tt_common_entry, |
876 | struct batadv_tt_global_entry, | |
877 | common); | |
878 | batadv_tt_global_print_entry(tt_global, seq); | |
c6c8fea2 | 879 | } |
7aadf889 | 880 | rcu_read_unlock(); |
c6c8fea2 | 881 | } |
32ae9b22 ML |
882 | out: |
883 | if (primary_if) | |
e5d89254 | 884 | batadv_hardif_free_ref(primary_if); |
30da63a6 | 885 | return 0; |
c6c8fea2 SE |
886 | } |
887 | ||
db08e6e5 | 888 | /* deletes the orig list of a tt_global_entry */ |
a513088d | 889 | static void |
56303d34 | 890 | batadv_tt_global_del_orig_list(struct batadv_tt_global_entry *tt_global_entry) |
c6c8fea2 | 891 | { |
db08e6e5 SW |
892 | struct hlist_head *head; |
893 | struct hlist_node *node, *safe; | |
56303d34 | 894 | struct batadv_tt_orig_list_entry *orig_entry; |
a73105b8 | 895 | |
db08e6e5 SW |
896 | spin_lock_bh(&tt_global_entry->list_lock); |
897 | head = &tt_global_entry->orig_list; | |
898 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
899 | hlist_del_rcu(node); | |
a513088d | 900 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
901 | } |
902 | spin_unlock_bh(&tt_global_entry->list_lock); | |
c6c8fea2 | 903 | |
db08e6e5 SW |
904 | } |
905 | ||
a513088d | 906 | static void |
56303d34 SE |
907 | batadv_tt_global_del_orig_entry(struct batadv_priv *bat_priv, |
908 | struct batadv_tt_global_entry *tt_global_entry, | |
909 | struct batadv_orig_node *orig_node, | |
a513088d | 910 | const char *message) |
db08e6e5 SW |
911 | { |
912 | struct hlist_head *head; | |
913 | struct hlist_node *node, *safe; | |
56303d34 | 914 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
915 | |
916 | spin_lock_bh(&tt_global_entry->list_lock); | |
917 | head = &tt_global_entry->orig_list; | |
918 | hlist_for_each_entry_safe(orig_entry, node, safe, head, list) { | |
919 | if (orig_entry->orig_node == orig_node) { | |
39c75a51 | 920 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
921 | "Deleting %pM from global tt entry %pM: %s\n", |
922 | orig_node->orig, | |
923 | tt_global_entry->common.addr, message); | |
db08e6e5 | 924 | hlist_del_rcu(node); |
a513088d | 925 | batadv_tt_orig_list_entry_free_ref(orig_entry); |
db08e6e5 SW |
926 | } |
927 | } | |
928 | spin_unlock_bh(&tt_global_entry->list_lock); | |
929 | } | |
930 | ||
56303d34 SE |
931 | static void |
932 | batadv_tt_global_del_struct(struct batadv_priv *bat_priv, | |
933 | struct batadv_tt_global_entry *tt_global_entry, | |
934 | const char *message) | |
db08e6e5 | 935 | { |
39c75a51 SE |
936 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
937 | "Deleting global tt entry %pM: %s\n", | |
1eda58bf | 938 | tt_global_entry->common.addr, message); |
7683fdc1 | 939 | |
807736f6 | 940 | batadv_hash_remove(bat_priv->tt.global_hash, batadv_compare_tt, |
da641193 | 941 | batadv_choose_orig, tt_global_entry->common.addr); |
a513088d | 942 | batadv_tt_global_entry_free_ref(tt_global_entry); |
db08e6e5 | 943 | |
c6c8fea2 SE |
944 | } |
945 | ||
db08e6e5 | 946 | /* If the client is to be deleted, we check if it is the last origantor entry |
acd34afa SE |
947 | * within tt_global entry. If yes, we set the BATADV_TT_CLIENT_ROAM flag and the |
948 | * timer, otherwise we simply remove the originator scheduled for deletion. | |
db08e6e5 | 949 | */ |
a513088d | 950 | static void |
56303d34 SE |
951 | batadv_tt_global_del_roaming(struct batadv_priv *bat_priv, |
952 | struct batadv_tt_global_entry *tt_global_entry, | |
953 | struct batadv_orig_node *orig_node, | |
954 | const char *message) | |
db08e6e5 SW |
955 | { |
956 | bool last_entry = true; | |
957 | struct hlist_head *head; | |
958 | struct hlist_node *node; | |
56303d34 | 959 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 SW |
960 | |
961 | /* no local entry exists, case 1: | |
962 | * Check if this is the last one or if other entries exist. | |
963 | */ | |
964 | ||
965 | rcu_read_lock(); | |
966 | head = &tt_global_entry->orig_list; | |
967 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
968 | if (orig_entry->orig_node != orig_node) { | |
969 | last_entry = false; | |
970 | break; | |
971 | } | |
972 | } | |
973 | rcu_read_unlock(); | |
974 | ||
975 | if (last_entry) { | |
976 | /* its the last one, mark for roaming. */ | |
acd34afa | 977 | tt_global_entry->common.flags |= BATADV_TT_CLIENT_ROAM; |
db08e6e5 SW |
978 | tt_global_entry->roam_at = jiffies; |
979 | } else | |
980 | /* there is another entry, we can simply delete this | |
981 | * one and can still use the other one. | |
982 | */ | |
a513088d SE |
983 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
984 | orig_node, message); | |
db08e6e5 SW |
985 | } |
986 | ||
987 | ||
988 | ||
56303d34 SE |
989 | static void batadv_tt_global_del(struct batadv_priv *bat_priv, |
990 | struct batadv_orig_node *orig_node, | |
a513088d SE |
991 | const unsigned char *addr, |
992 | const char *message, bool roaming) | |
a73105b8 | 993 | { |
56303d34 SE |
994 | struct batadv_tt_global_entry *tt_global_entry = NULL; |
995 | struct batadv_tt_local_entry *local_entry = NULL; | |
a73105b8 | 996 | |
a513088d | 997 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
db08e6e5 | 998 | if (!tt_global_entry) |
7683fdc1 | 999 | goto out; |
a73105b8 | 1000 | |
db08e6e5 | 1001 | if (!roaming) { |
a513088d SE |
1002 | batadv_tt_global_del_orig_entry(bat_priv, tt_global_entry, |
1003 | orig_node, message); | |
db08e6e5 SW |
1004 | |
1005 | if (hlist_empty(&tt_global_entry->orig_list)) | |
a513088d SE |
1006 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, |
1007 | message); | |
db08e6e5 SW |
1008 | |
1009 | goto out; | |
1010 | } | |
92f90f56 SE |
1011 | |
1012 | /* if we are deleting a global entry due to a roam | |
1013 | * event, there are two possibilities: | |
db08e6e5 SW |
1014 | * 1) the client roamed from node A to node B => if there |
1015 | * is only one originator left for this client, we mark | |
acd34afa | 1016 | * it with BATADV_TT_CLIENT_ROAM, we start a timer and we |
92f90f56 SE |
1017 | * wait for node B to claim it. In case of timeout |
1018 | * the entry is purged. | |
db08e6e5 SW |
1019 | * |
1020 | * If there are other originators left, we directly delete | |
1021 | * the originator. | |
92f90f56 | 1022 | * 2) the client roamed to us => we can directly delete |
9cfc7bd6 SE |
1023 | * the global entry, since it is useless now. |
1024 | */ | |
a513088d SE |
1025 | local_entry = batadv_tt_local_hash_find(bat_priv, |
1026 | tt_global_entry->common.addr); | |
1027 | if (local_entry) { | |
db08e6e5 | 1028 | /* local entry exists, case 2: client roamed to us. */ |
a513088d SE |
1029 | batadv_tt_global_del_orig_list(tt_global_entry); |
1030 | batadv_tt_global_del_struct(bat_priv, tt_global_entry, message); | |
db08e6e5 SW |
1031 | } else |
1032 | /* no local entry exists, case 1: check for roaming */ | |
a513088d SE |
1033 | batadv_tt_global_del_roaming(bat_priv, tt_global_entry, |
1034 | orig_node, message); | |
92f90f56 | 1035 | |
92f90f56 | 1036 | |
cc47f66e | 1037 | out: |
7683fdc1 | 1038 | if (tt_global_entry) |
a513088d SE |
1039 | batadv_tt_global_entry_free_ref(tt_global_entry); |
1040 | if (local_entry) | |
1041 | batadv_tt_local_entry_free_ref(local_entry); | |
a73105b8 AQ |
1042 | } |
1043 | ||
56303d34 SE |
1044 | void batadv_tt_global_del_orig(struct batadv_priv *bat_priv, |
1045 | struct batadv_orig_node *orig_node, | |
1046 | const char *message) | |
c6c8fea2 | 1047 | { |
56303d34 SE |
1048 | struct batadv_tt_global_entry *tt_global; |
1049 | struct batadv_tt_common_entry *tt_common_entry; | |
c90681b8 | 1050 | uint32_t i; |
807736f6 | 1051 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
a73105b8 AQ |
1052 | struct hlist_node *node, *safe; |
1053 | struct hlist_head *head; | |
7683fdc1 | 1054 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c6c8fea2 | 1055 | |
6e801494 SW |
1056 | if (!hash) |
1057 | return; | |
1058 | ||
a73105b8 AQ |
1059 | for (i = 0; i < hash->size; i++) { |
1060 | head = &hash->table[i]; | |
7683fdc1 | 1061 | list_lock = &hash->list_locks[i]; |
c6c8fea2 | 1062 | |
7683fdc1 | 1063 | spin_lock_bh(list_lock); |
48100bac | 1064 | hlist_for_each_entry_safe(tt_common_entry, node, safe, |
7c64fd98 | 1065 | head, hash_entry) { |
56303d34 SE |
1066 | tt_global = container_of(tt_common_entry, |
1067 | struct batadv_tt_global_entry, | |
1068 | common); | |
db08e6e5 | 1069 | |
56303d34 | 1070 | batadv_tt_global_del_orig_entry(bat_priv, tt_global, |
a513088d | 1071 | orig_node, message); |
db08e6e5 | 1072 | |
56303d34 | 1073 | if (hlist_empty(&tt_global->orig_list)) { |
39c75a51 | 1074 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 1075 | "Deleting global tt entry %pM: %s\n", |
56303d34 | 1076 | tt_global->common.addr, message); |
7683fdc1 | 1077 | hlist_del_rcu(node); |
56303d34 | 1078 | batadv_tt_global_entry_free_ref(tt_global); |
7683fdc1 | 1079 | } |
a73105b8 | 1080 | } |
7683fdc1 | 1081 | spin_unlock_bh(list_lock); |
c6c8fea2 | 1082 | } |
17071578 | 1083 | orig_node->tt_initialised = false; |
c6c8fea2 SE |
1084 | } |
1085 | ||
30cfd02b AQ |
1086 | static bool batadv_tt_global_to_purge(struct batadv_tt_global_entry *tt_global, |
1087 | char **msg) | |
cc47f66e | 1088 | { |
30cfd02b AQ |
1089 | bool purge = false; |
1090 | unsigned long roam_timeout = BATADV_TT_CLIENT_ROAM_TIMEOUT; | |
1091 | unsigned long temp_timeout = BATADV_TT_CLIENT_TEMP_TIMEOUT; | |
42d0b044 | 1092 | |
30cfd02b AQ |
1093 | if ((tt_global->common.flags & BATADV_TT_CLIENT_ROAM) && |
1094 | batadv_has_timed_out(tt_global->roam_at, roam_timeout)) { | |
1095 | purge = true; | |
1096 | *msg = "Roaming timeout\n"; | |
1097 | } | |
42d0b044 | 1098 | |
30cfd02b AQ |
1099 | if ((tt_global->common.flags & BATADV_TT_CLIENT_TEMP) && |
1100 | batadv_has_timed_out(tt_global->common.added_at, temp_timeout)) { | |
1101 | purge = true; | |
1102 | *msg = "Temporary client timeout\n"; | |
42d0b044 | 1103 | } |
30cfd02b AQ |
1104 | |
1105 | return purge; | |
42d0b044 SE |
1106 | } |
1107 | ||
30cfd02b | 1108 | static void batadv_tt_global_purge(struct batadv_priv *bat_priv) |
42d0b044 | 1109 | { |
807736f6 | 1110 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
cc47f66e | 1111 | struct hlist_head *head; |
30cfd02b | 1112 | struct hlist_node *node, *node_tmp; |
7683fdc1 | 1113 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
c90681b8 | 1114 | uint32_t i; |
30cfd02b AQ |
1115 | char *msg = NULL; |
1116 | struct batadv_tt_common_entry *tt_common; | |
1117 | struct batadv_tt_global_entry *tt_global; | |
cc47f66e | 1118 | |
cc47f66e AQ |
1119 | for (i = 0; i < hash->size; i++) { |
1120 | head = &hash->table[i]; | |
7683fdc1 | 1121 | list_lock = &hash->list_locks[i]; |
cc47f66e | 1122 | |
7683fdc1 | 1123 | spin_lock_bh(list_lock); |
30cfd02b AQ |
1124 | hlist_for_each_entry_safe(tt_common, node, node_tmp, head, |
1125 | hash_entry) { | |
1126 | tt_global = container_of(tt_common, | |
1127 | struct batadv_tt_global_entry, | |
1128 | common); | |
1129 | ||
1130 | if (!batadv_tt_global_to_purge(tt_global, &msg)) | |
1131 | continue; | |
1132 | ||
1133 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
1134 | "Deleting global tt entry (%pM): %s\n", | |
1135 | tt_global->common.addr, msg); | |
1136 | ||
1137 | hlist_del_rcu(node); | |
1138 | ||
1139 | batadv_tt_global_entry_free_ref(tt_global); | |
1140 | } | |
7683fdc1 | 1141 | spin_unlock_bh(list_lock); |
cc47f66e | 1142 | } |
cc47f66e AQ |
1143 | } |
1144 | ||
56303d34 | 1145 | static void batadv_tt_global_table_free(struct batadv_priv *bat_priv) |
c6c8fea2 | 1146 | { |
5bf74e9c | 1147 | struct batadv_hashtable *hash; |
7683fdc1 | 1148 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
56303d34 SE |
1149 | struct batadv_tt_common_entry *tt_common_entry; |
1150 | struct batadv_tt_global_entry *tt_global; | |
7683fdc1 AQ |
1151 | struct hlist_node *node, *node_tmp; |
1152 | struct hlist_head *head; | |
c90681b8 | 1153 | uint32_t i; |
7683fdc1 | 1154 | |
807736f6 | 1155 | if (!bat_priv->tt.global_hash) |
c6c8fea2 SE |
1156 | return; |
1157 | ||
807736f6 | 1158 | hash = bat_priv->tt.global_hash; |
7683fdc1 AQ |
1159 | |
1160 | for (i = 0; i < hash->size; i++) { | |
1161 | head = &hash->table[i]; | |
1162 | list_lock = &hash->list_locks[i]; | |
1163 | ||
1164 | spin_lock_bh(list_lock); | |
48100bac | 1165 | hlist_for_each_entry_safe(tt_common_entry, node, node_tmp, |
7683fdc1 AQ |
1166 | head, hash_entry) { |
1167 | hlist_del_rcu(node); | |
56303d34 SE |
1168 | tt_global = container_of(tt_common_entry, |
1169 | struct batadv_tt_global_entry, | |
1170 | common); | |
1171 | batadv_tt_global_entry_free_ref(tt_global); | |
7683fdc1 AQ |
1172 | } |
1173 | spin_unlock_bh(list_lock); | |
1174 | } | |
1175 | ||
1a8eaf07 | 1176 | batadv_hash_destroy(hash); |
7683fdc1 | 1177 | |
807736f6 | 1178 | bat_priv->tt.global_hash = NULL; |
c6c8fea2 SE |
1179 | } |
1180 | ||
56303d34 SE |
1181 | static bool |
1182 | _batadv_is_ap_isolated(struct batadv_tt_local_entry *tt_local_entry, | |
1183 | struct batadv_tt_global_entry *tt_global_entry) | |
59b699cd AQ |
1184 | { |
1185 | bool ret = false; | |
1186 | ||
acd34afa SE |
1187 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_WIFI && |
1188 | tt_global_entry->common.flags & BATADV_TT_CLIENT_WIFI) | |
59b699cd AQ |
1189 | ret = true; |
1190 | ||
1191 | return ret; | |
1192 | } | |
1193 | ||
56303d34 SE |
1194 | struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv, |
1195 | const uint8_t *src, | |
1196 | const uint8_t *addr) | |
c6c8fea2 | 1197 | { |
56303d34 SE |
1198 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
1199 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
1200 | struct batadv_orig_node *orig_node = NULL; | |
1201 | struct batadv_neigh_node *router = NULL; | |
db08e6e5 SW |
1202 | struct hlist_head *head; |
1203 | struct hlist_node *node; | |
56303d34 | 1204 | struct batadv_tt_orig_list_entry *orig_entry; |
db08e6e5 | 1205 | int best_tq; |
c6c8fea2 | 1206 | |
3d393e47 | 1207 | if (src && atomic_read(&bat_priv->ap_isolation)) { |
a513088d | 1208 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, src); |
3d393e47 AQ |
1209 | if (!tt_local_entry) |
1210 | goto out; | |
1211 | } | |
7aadf889 | 1212 | |
a513088d | 1213 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
2dafb49d | 1214 | if (!tt_global_entry) |
7b36e8ee | 1215 | goto out; |
7aadf889 | 1216 | |
3d393e47 | 1217 | /* check whether the clients should not communicate due to AP |
9cfc7bd6 SE |
1218 | * isolation |
1219 | */ | |
a513088d SE |
1220 | if (tt_local_entry && |
1221 | _batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) | |
3d393e47 AQ |
1222 | goto out; |
1223 | ||
db08e6e5 | 1224 | best_tq = 0; |
c6c8fea2 | 1225 | |
db08e6e5 SW |
1226 | rcu_read_lock(); |
1227 | head = &tt_global_entry->orig_list; | |
1228 | hlist_for_each_entry_rcu(orig_entry, node, head, list) { | |
7d211efc | 1229 | router = batadv_orig_node_get_router(orig_entry->orig_node); |
db08e6e5 SW |
1230 | if (!router) |
1231 | continue; | |
c6c8fea2 | 1232 | |
db08e6e5 SW |
1233 | if (router->tq_avg > best_tq) { |
1234 | orig_node = orig_entry->orig_node; | |
1235 | best_tq = router->tq_avg; | |
1236 | } | |
7d211efc | 1237 | batadv_neigh_node_free_ref(router); |
db08e6e5 SW |
1238 | } |
1239 | /* found anything? */ | |
1240 | if (orig_node && !atomic_inc_not_zero(&orig_node->refcount)) | |
1241 | orig_node = NULL; | |
1242 | rcu_read_unlock(); | |
7b36e8ee | 1243 | out: |
3d393e47 | 1244 | if (tt_global_entry) |
a513088d | 1245 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3d393e47 | 1246 | if (tt_local_entry) |
a513088d | 1247 | batadv_tt_local_entry_free_ref(tt_local_entry); |
3d393e47 | 1248 | |
7b36e8ee | 1249 | return orig_node; |
c6c8fea2 | 1250 | } |
a73105b8 AQ |
1251 | |
1252 | /* Calculates the checksum of the local table of a given orig_node */ | |
56303d34 SE |
1253 | static uint16_t batadv_tt_global_crc(struct batadv_priv *bat_priv, |
1254 | struct batadv_orig_node *orig_node) | |
a73105b8 AQ |
1255 | { |
1256 | uint16_t total = 0, total_one; | |
807736f6 | 1257 | struct batadv_hashtable *hash = bat_priv->tt.global_hash; |
56303d34 SE |
1258 | struct batadv_tt_common_entry *tt_common; |
1259 | struct batadv_tt_global_entry *tt_global; | |
a73105b8 AQ |
1260 | struct hlist_node *node; |
1261 | struct hlist_head *head; | |
c90681b8 AQ |
1262 | uint32_t i; |
1263 | int j; | |
a73105b8 AQ |
1264 | |
1265 | for (i = 0; i < hash->size; i++) { | |
1266 | head = &hash->table[i]; | |
1267 | ||
1268 | rcu_read_lock(); | |
acd34afa | 1269 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
56303d34 SE |
1270 | tt_global = container_of(tt_common, |
1271 | struct batadv_tt_global_entry, | |
1272 | common); | |
db08e6e5 SW |
1273 | /* Roaming clients are in the global table for |
1274 | * consistency only. They don't have to be | |
1275 | * taken into account while computing the | |
1276 | * global crc | |
1277 | */ | |
acd34afa | 1278 | if (tt_common->flags & BATADV_TT_CLIENT_ROAM) |
db08e6e5 | 1279 | continue; |
30cfd02b AQ |
1280 | /* Temporary clients have not been announced yet, so |
1281 | * they have to be skipped while computing the global | |
1282 | * crc | |
1283 | */ | |
1284 | if (tt_common->flags & BATADV_TT_CLIENT_TEMP) | |
1285 | continue; | |
db08e6e5 SW |
1286 | |
1287 | /* find out if this global entry is announced by this | |
1288 | * originator | |
1289 | */ | |
56303d34 | 1290 | if (!batadv_tt_global_entry_has_orig(tt_global, |
a513088d | 1291 | orig_node)) |
db08e6e5 SW |
1292 | continue; |
1293 | ||
1294 | total_one = 0; | |
1295 | for (j = 0; j < ETH_ALEN; j++) | |
1296 | total_one = crc16_byte(total_one, | |
acd34afa | 1297 | tt_common->addr[j]); |
db08e6e5 | 1298 | total ^= total_one; |
a73105b8 AQ |
1299 | } |
1300 | rcu_read_unlock(); | |
1301 | } | |
1302 | ||
1303 | return total; | |
1304 | } | |
1305 | ||
1306 | /* Calculates the checksum of the local table */ | |
56303d34 | 1307 | static uint16_t batadv_tt_local_crc(struct batadv_priv *bat_priv) |
a73105b8 AQ |
1308 | { |
1309 | uint16_t total = 0, total_one; | |
807736f6 | 1310 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 | 1311 | struct batadv_tt_common_entry *tt_common; |
a73105b8 AQ |
1312 | struct hlist_node *node; |
1313 | struct hlist_head *head; | |
c90681b8 AQ |
1314 | uint32_t i; |
1315 | int j; | |
a73105b8 AQ |
1316 | |
1317 | for (i = 0; i < hash->size; i++) { | |
1318 | head = &hash->table[i]; | |
1319 | ||
1320 | rcu_read_lock(); | |
acd34afa | 1321 | hlist_for_each_entry_rcu(tt_common, node, head, hash_entry) { |
058d0e26 | 1322 | /* not yet committed clients have not to be taken into |
9cfc7bd6 SE |
1323 | * account while computing the CRC |
1324 | */ | |
acd34afa | 1325 | if (tt_common->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 | 1326 | continue; |
a73105b8 AQ |
1327 | total_one = 0; |
1328 | for (j = 0; j < ETH_ALEN; j++) | |
1329 | total_one = crc16_byte(total_one, | |
acd34afa | 1330 | tt_common->addr[j]); |
a73105b8 AQ |
1331 | total ^= total_one; |
1332 | } | |
a73105b8 AQ |
1333 | rcu_read_unlock(); |
1334 | } | |
1335 | ||
1336 | return total; | |
1337 | } | |
1338 | ||
56303d34 | 1339 | static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 1340 | { |
56303d34 | 1341 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1342 | |
807736f6 | 1343 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1344 | |
807736f6 | 1345 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { |
a73105b8 AQ |
1346 | list_del(&node->list); |
1347 | kfree(node); | |
1348 | } | |
1349 | ||
807736f6 | 1350 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1351 | } |
1352 | ||
56303d34 SE |
1353 | static void batadv_tt_save_orig_buffer(struct batadv_priv *bat_priv, |
1354 | struct batadv_orig_node *orig_node, | |
a513088d SE |
1355 | const unsigned char *tt_buff, |
1356 | uint8_t tt_num_changes) | |
a73105b8 | 1357 | { |
08c36d3e | 1358 | uint16_t tt_buff_len = batadv_tt_len(tt_num_changes); |
a73105b8 AQ |
1359 | |
1360 | /* Replace the old buffer only if I received something in the | |
9cfc7bd6 SE |
1361 | * last OGM (the OGM could carry no changes) |
1362 | */ | |
a73105b8 AQ |
1363 | spin_lock_bh(&orig_node->tt_buff_lock); |
1364 | if (tt_buff_len > 0) { | |
1365 | kfree(orig_node->tt_buff); | |
1366 | orig_node->tt_buff_len = 0; | |
1367 | orig_node->tt_buff = kmalloc(tt_buff_len, GFP_ATOMIC); | |
1368 | if (orig_node->tt_buff) { | |
1369 | memcpy(orig_node->tt_buff, tt_buff, tt_buff_len); | |
1370 | orig_node->tt_buff_len = tt_buff_len; | |
1371 | } | |
1372 | } | |
1373 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1374 | } | |
1375 | ||
56303d34 | 1376 | static void batadv_tt_req_purge(struct batadv_priv *bat_priv) |
a73105b8 | 1377 | { |
56303d34 | 1378 | struct batadv_tt_req_node *node, *safe; |
a73105b8 | 1379 | |
807736f6 SE |
1380 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1381 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
42d0b044 SE |
1382 | if (batadv_has_timed_out(node->issued_at, |
1383 | BATADV_TT_REQUEST_TIMEOUT)) { | |
a73105b8 AQ |
1384 | list_del(&node->list); |
1385 | kfree(node); | |
1386 | } | |
1387 | } | |
807736f6 | 1388 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1389 | } |
1390 | ||
1391 | /* returns the pointer to the new tt_req_node struct if no request | |
9cfc7bd6 SE |
1392 | * has already been issued for this orig_node, NULL otherwise |
1393 | */ | |
56303d34 SE |
1394 | static struct batadv_tt_req_node * |
1395 | batadv_new_tt_req_node(struct batadv_priv *bat_priv, | |
1396 | struct batadv_orig_node *orig_node) | |
a73105b8 | 1397 | { |
56303d34 | 1398 | struct batadv_tt_req_node *tt_req_node_tmp, *tt_req_node = NULL; |
a73105b8 | 1399 | |
807736f6 SE |
1400 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1401 | list_for_each_entry(tt_req_node_tmp, &bat_priv->tt.req_list, list) { | |
1eda58bf SE |
1402 | if (batadv_compare_eth(tt_req_node_tmp, orig_node) && |
1403 | !batadv_has_timed_out(tt_req_node_tmp->issued_at, | |
42d0b044 | 1404 | BATADV_TT_REQUEST_TIMEOUT)) |
a73105b8 AQ |
1405 | goto unlock; |
1406 | } | |
1407 | ||
1408 | tt_req_node = kmalloc(sizeof(*tt_req_node), GFP_ATOMIC); | |
1409 | if (!tt_req_node) | |
1410 | goto unlock; | |
1411 | ||
1412 | memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN); | |
1413 | tt_req_node->issued_at = jiffies; | |
1414 | ||
807736f6 | 1415 | list_add(&tt_req_node->list, &bat_priv->tt.req_list); |
a73105b8 | 1416 | unlock: |
807736f6 | 1417 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1418 | return tt_req_node; |
1419 | } | |
1420 | ||
058d0e26 | 1421 | /* data_ptr is useless here, but has to be kept to respect the prototype */ |
a513088d SE |
1422 | static int batadv_tt_local_valid_entry(const void *entry_ptr, |
1423 | const void *data_ptr) | |
058d0e26 | 1424 | { |
56303d34 | 1425 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
058d0e26 | 1426 | |
acd34afa | 1427 | if (tt_common_entry->flags & BATADV_TT_CLIENT_NEW) |
058d0e26 AQ |
1428 | return 0; |
1429 | return 1; | |
1430 | } | |
1431 | ||
a513088d SE |
1432 | static int batadv_tt_global_valid(const void *entry_ptr, |
1433 | const void *data_ptr) | |
a73105b8 | 1434 | { |
56303d34 SE |
1435 | const struct batadv_tt_common_entry *tt_common_entry = entry_ptr; |
1436 | const struct batadv_tt_global_entry *tt_global_entry; | |
1437 | const struct batadv_orig_node *orig_node = data_ptr; | |
a73105b8 | 1438 | |
30cfd02b AQ |
1439 | if (tt_common_entry->flags & BATADV_TT_CLIENT_ROAM || |
1440 | tt_common_entry->flags & BATADV_TT_CLIENT_TEMP) | |
cc47f66e AQ |
1441 | return 0; |
1442 | ||
56303d34 SE |
1443 | tt_global_entry = container_of(tt_common_entry, |
1444 | struct batadv_tt_global_entry, | |
48100bac AQ |
1445 | common); |
1446 | ||
a513088d | 1447 | return batadv_tt_global_entry_has_orig(tt_global_entry, orig_node); |
a73105b8 AQ |
1448 | } |
1449 | ||
a513088d SE |
1450 | static struct sk_buff * |
1451 | batadv_tt_response_fill_table(uint16_t tt_len, uint8_t ttvn, | |
5bf74e9c | 1452 | struct batadv_hashtable *hash, |
56303d34 | 1453 | struct batadv_hard_iface *primary_if, |
a513088d SE |
1454 | int (*valid_cb)(const void *, const void *), |
1455 | void *cb_data) | |
a73105b8 | 1456 | { |
56303d34 | 1457 | struct batadv_tt_common_entry *tt_common_entry; |
96412690 SE |
1458 | struct batadv_tt_query_packet *tt_response; |
1459 | struct batadv_tt_change *tt_change; | |
a73105b8 AQ |
1460 | struct hlist_node *node; |
1461 | struct hlist_head *head; | |
1462 | struct sk_buff *skb = NULL; | |
1463 | uint16_t tt_tot, tt_count; | |
96412690 | 1464 | ssize_t tt_query_size = sizeof(struct batadv_tt_query_packet); |
c90681b8 | 1465 | uint32_t i; |
96412690 | 1466 | size_t len; |
a73105b8 AQ |
1467 | |
1468 | if (tt_query_size + tt_len > primary_if->soft_iface->mtu) { | |
1469 | tt_len = primary_if->soft_iface->mtu - tt_query_size; | |
96412690 | 1470 | tt_len -= tt_len % sizeof(struct batadv_tt_change); |
a73105b8 | 1471 | } |
96412690 | 1472 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1473 | |
96412690 SE |
1474 | len = tt_query_size + tt_len; |
1475 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1476 | if (!skb) |
1477 | goto out; | |
1478 | ||
1479 | skb_reserve(skb, ETH_HLEN); | |
96412690 | 1480 | tt_response = (struct batadv_tt_query_packet *)skb_put(skb, len); |
a73105b8 | 1481 | tt_response->ttvn = ttvn; |
a73105b8 | 1482 | |
96412690 | 1483 | tt_change = (struct batadv_tt_change *)(skb->data + tt_query_size); |
a73105b8 AQ |
1484 | tt_count = 0; |
1485 | ||
1486 | rcu_read_lock(); | |
1487 | for (i = 0; i < hash->size; i++) { | |
1488 | head = &hash->table[i]; | |
1489 | ||
48100bac | 1490 | hlist_for_each_entry_rcu(tt_common_entry, node, |
a73105b8 AQ |
1491 | head, hash_entry) { |
1492 | if (tt_count == tt_tot) | |
1493 | break; | |
1494 | ||
48100bac | 1495 | if ((valid_cb) && (!valid_cb(tt_common_entry, cb_data))) |
a73105b8 AQ |
1496 | continue; |
1497 | ||
48100bac AQ |
1498 | memcpy(tt_change->addr, tt_common_entry->addr, |
1499 | ETH_ALEN); | |
42d0b044 | 1500 | tt_change->flags = BATADV_NO_FLAGS; |
a73105b8 AQ |
1501 | |
1502 | tt_count++; | |
1503 | tt_change++; | |
1504 | } | |
1505 | } | |
1506 | rcu_read_unlock(); | |
1507 | ||
9d852393 | 1508 | /* store in the message the number of entries we have successfully |
9cfc7bd6 SE |
1509 | * copied |
1510 | */ | |
9d852393 AQ |
1511 | tt_response->tt_data = htons(tt_count); |
1512 | ||
a73105b8 AQ |
1513 | out: |
1514 | return skb; | |
1515 | } | |
1516 | ||
56303d34 SE |
1517 | static int batadv_send_tt_request(struct batadv_priv *bat_priv, |
1518 | struct batadv_orig_node *dst_orig_node, | |
a513088d SE |
1519 | uint8_t ttvn, uint16_t tt_crc, |
1520 | bool full_table) | |
a73105b8 AQ |
1521 | { |
1522 | struct sk_buff *skb = NULL; | |
96412690 | 1523 | struct batadv_tt_query_packet *tt_request; |
56303d34 SE |
1524 | struct batadv_neigh_node *neigh_node = NULL; |
1525 | struct batadv_hard_iface *primary_if; | |
1526 | struct batadv_tt_req_node *tt_req_node = NULL; | |
a73105b8 | 1527 | int ret = 1; |
96412690 | 1528 | size_t tt_req_len; |
a73105b8 | 1529 | |
e5d89254 | 1530 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1531 | if (!primary_if) |
1532 | goto out; | |
1533 | ||
1534 | /* The new tt_req will be issued only if I'm not waiting for a | |
9cfc7bd6 SE |
1535 | * reply from the same orig_node yet |
1536 | */ | |
a513088d | 1537 | tt_req_node = batadv_new_tt_req_node(bat_priv, dst_orig_node); |
a73105b8 AQ |
1538 | if (!tt_req_node) |
1539 | goto out; | |
1540 | ||
96412690 | 1541 | skb = dev_alloc_skb(sizeof(*tt_request) + ETH_HLEN); |
a73105b8 AQ |
1542 | if (!skb) |
1543 | goto out; | |
1544 | ||
1545 | skb_reserve(skb, ETH_HLEN); | |
1546 | ||
96412690 SE |
1547 | tt_req_len = sizeof(*tt_request); |
1548 | tt_request = (struct batadv_tt_query_packet *)skb_put(skb, tt_req_len); | |
a73105b8 | 1549 | |
acd34afa | 1550 | tt_request->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1551 | tt_request->header.version = BATADV_COMPAT_VERSION; |
a73105b8 AQ |
1552 | memcpy(tt_request->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1553 | memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN); | |
42d0b044 | 1554 | tt_request->header.ttl = BATADV_TTL; |
a73105b8 | 1555 | tt_request->ttvn = ttvn; |
6d2003fc | 1556 | tt_request->tt_data = htons(tt_crc); |
acd34afa | 1557 | tt_request->flags = BATADV_TT_REQUEST; |
a73105b8 AQ |
1558 | |
1559 | if (full_table) | |
acd34afa | 1560 | tt_request->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1561 | |
7d211efc | 1562 | neigh_node = batadv_orig_node_get_router(dst_orig_node); |
a73105b8 AQ |
1563 | if (!neigh_node) |
1564 | goto out; | |
1565 | ||
39c75a51 | 1566 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1567 | "Sending TT_REQUEST to %pM via %pM [%c]\n", |
1568 | dst_orig_node->orig, neigh_node->addr, | |
1569 | (full_table ? 'F' : '.')); | |
a73105b8 | 1570 | |
d69909d2 | 1571 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX); |
f8214865 | 1572 | |
9455e34c | 1573 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1574 | ret = 0; |
1575 | ||
1576 | out: | |
1577 | if (neigh_node) | |
7d211efc | 1578 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1579 | if (primary_if) |
e5d89254 | 1580 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1581 | if (ret) |
1582 | kfree_skb(skb); | |
1583 | if (ret && tt_req_node) { | |
807736f6 | 1584 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 | 1585 | list_del(&tt_req_node->list); |
807736f6 | 1586 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1587 | kfree(tt_req_node); |
1588 | } | |
1589 | return ret; | |
1590 | } | |
1591 | ||
96412690 | 1592 | static bool |
56303d34 | 1593 | batadv_send_other_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1594 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1595 | { |
56303d34 SE |
1596 | struct batadv_orig_node *req_dst_orig_node = NULL; |
1597 | struct batadv_orig_node *res_dst_orig_node = NULL; | |
1598 | struct batadv_neigh_node *neigh_node = NULL; | |
1599 | struct batadv_hard_iface *primary_if = NULL; | |
a73105b8 AQ |
1600 | uint8_t orig_ttvn, req_ttvn, ttvn; |
1601 | int ret = false; | |
1602 | unsigned char *tt_buff; | |
1603 | bool full_table; | |
1604 | uint16_t tt_len, tt_tot; | |
1605 | struct sk_buff *skb = NULL; | |
96412690 | 1606 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1607 | uint8_t *packet_pos; |
96412690 | 1608 | size_t len; |
a73105b8 | 1609 | |
39c75a51 | 1610 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1611 | "Received TT_REQUEST from %pM for ttvn: %u (%pM) [%c]\n", |
1612 | tt_request->src, tt_request->ttvn, tt_request->dst, | |
acd34afa | 1613 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1614 | |
1615 | /* Let's get the orig node of the REAL destination */ | |
da641193 | 1616 | req_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->dst); |
a73105b8 AQ |
1617 | if (!req_dst_orig_node) |
1618 | goto out; | |
1619 | ||
da641193 | 1620 | res_dst_orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1621 | if (!res_dst_orig_node) |
1622 | goto out; | |
1623 | ||
7d211efc | 1624 | neigh_node = batadv_orig_node_get_router(res_dst_orig_node); |
a73105b8 AQ |
1625 | if (!neigh_node) |
1626 | goto out; | |
1627 | ||
e5d89254 | 1628 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1629 | if (!primary_if) |
1630 | goto out; | |
1631 | ||
1632 | orig_ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); | |
1633 | req_ttvn = tt_request->ttvn; | |
1634 | ||
015758d0 | 1635 | /* I don't have the requested data */ |
a73105b8 | 1636 | if (orig_ttvn != req_ttvn || |
f25bd58a | 1637 | tt_request->tt_data != htons(req_dst_orig_node->tt_crc)) |
a73105b8 AQ |
1638 | goto out; |
1639 | ||
015758d0 | 1640 | /* If the full table has been explicitly requested */ |
acd34afa | 1641 | if (tt_request->flags & BATADV_TT_FULL_TABLE || |
a73105b8 AQ |
1642 | !req_dst_orig_node->tt_buff) |
1643 | full_table = true; | |
1644 | else | |
1645 | full_table = false; | |
1646 | ||
1647 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1648 | * I'll send only one packet with as much TT entries as I can |
1649 | */ | |
a73105b8 AQ |
1650 | if (!full_table) { |
1651 | spin_lock_bh(&req_dst_orig_node->tt_buff_lock); | |
1652 | tt_len = req_dst_orig_node->tt_buff_len; | |
96412690 | 1653 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1654 | |
96412690 SE |
1655 | len = sizeof(*tt_response) + tt_len; |
1656 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1657 | if (!skb) |
1658 | goto unlock; | |
1659 | ||
1660 | skb_reserve(skb, ETH_HLEN); | |
c67893d1 SE |
1661 | packet_pos = skb_put(skb, len); |
1662 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1663 | tt_response->ttvn = req_ttvn; |
1664 | tt_response->tt_data = htons(tt_tot); | |
1665 | ||
96412690 | 1666 | tt_buff = skb->data + sizeof(*tt_response); |
a73105b8 AQ |
1667 | /* Copy the last orig_node's OGM buffer */ |
1668 | memcpy(tt_buff, req_dst_orig_node->tt_buff, | |
1669 | req_dst_orig_node->tt_buff_len); | |
1670 | ||
1671 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1672 | } else { | |
96412690 SE |
1673 | tt_len = (uint16_t)atomic_read(&req_dst_orig_node->tt_size); |
1674 | tt_len *= sizeof(struct batadv_tt_change); | |
a73105b8 AQ |
1675 | ttvn = (uint8_t)atomic_read(&req_dst_orig_node->last_ttvn); |
1676 | ||
a513088d | 1677 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1678 | bat_priv->tt.global_hash, |
a513088d SE |
1679 | primary_if, |
1680 | batadv_tt_global_valid, | |
1681 | req_dst_orig_node); | |
a73105b8 AQ |
1682 | if (!skb) |
1683 | goto out; | |
1684 | ||
96412690 | 1685 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1686 | } |
1687 | ||
acd34afa | 1688 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1689 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1690 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1691 | memcpy(tt_response->src, req_dst_orig_node->orig, ETH_ALEN); |
1692 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1693 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1694 | |
1695 | if (full_table) | |
acd34afa | 1696 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1697 | |
39c75a51 | 1698 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1699 | "Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n", |
1700 | res_dst_orig_node->orig, neigh_node->addr, | |
1701 | req_dst_orig_node->orig, req_ttvn); | |
a73105b8 | 1702 | |
d69909d2 | 1703 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1704 | |
9455e34c | 1705 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1706 | ret = true; |
1707 | goto out; | |
1708 | ||
1709 | unlock: | |
1710 | spin_unlock_bh(&req_dst_orig_node->tt_buff_lock); | |
1711 | ||
1712 | out: | |
1713 | if (res_dst_orig_node) | |
7d211efc | 1714 | batadv_orig_node_free_ref(res_dst_orig_node); |
a73105b8 | 1715 | if (req_dst_orig_node) |
7d211efc | 1716 | batadv_orig_node_free_ref(req_dst_orig_node); |
a73105b8 | 1717 | if (neigh_node) |
7d211efc | 1718 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1719 | if (primary_if) |
e5d89254 | 1720 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1721 | if (!ret) |
1722 | kfree_skb(skb); | |
1723 | return ret; | |
1724 | ||
1725 | } | |
96412690 SE |
1726 | |
1727 | static bool | |
56303d34 | 1728 | batadv_send_my_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1729 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1730 | { |
56303d34 SE |
1731 | struct batadv_orig_node *orig_node = NULL; |
1732 | struct batadv_neigh_node *neigh_node = NULL; | |
1733 | struct batadv_hard_iface *primary_if = NULL; | |
a73105b8 AQ |
1734 | uint8_t my_ttvn, req_ttvn, ttvn; |
1735 | int ret = false; | |
1736 | unsigned char *tt_buff; | |
1737 | bool full_table; | |
1738 | uint16_t tt_len, tt_tot; | |
1739 | struct sk_buff *skb = NULL; | |
96412690 | 1740 | struct batadv_tt_query_packet *tt_response; |
c67893d1 | 1741 | uint8_t *packet_pos; |
96412690 | 1742 | size_t len; |
a73105b8 | 1743 | |
39c75a51 | 1744 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1745 | "Received TT_REQUEST from %pM for ttvn: %u (me) [%c]\n", |
1746 | tt_request->src, tt_request->ttvn, | |
acd34afa | 1747 | (tt_request->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 AQ |
1748 | |
1749 | ||
807736f6 | 1750 | my_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 AQ |
1751 | req_ttvn = tt_request->ttvn; |
1752 | ||
da641193 | 1753 | orig_node = batadv_orig_hash_find(bat_priv, tt_request->src); |
a73105b8 AQ |
1754 | if (!orig_node) |
1755 | goto out; | |
1756 | ||
7d211efc | 1757 | neigh_node = batadv_orig_node_get_router(orig_node); |
a73105b8 AQ |
1758 | if (!neigh_node) |
1759 | goto out; | |
1760 | ||
e5d89254 | 1761 | primary_if = batadv_primary_if_get_selected(bat_priv); |
a73105b8 AQ |
1762 | if (!primary_if) |
1763 | goto out; | |
1764 | ||
1765 | /* If the full table has been explicitly requested or the gap | |
9cfc7bd6 SE |
1766 | * is too big send the whole local translation table |
1767 | */ | |
acd34afa | 1768 | if (tt_request->flags & BATADV_TT_FULL_TABLE || my_ttvn != req_ttvn || |
807736f6 | 1769 | !bat_priv->tt.last_changeset) |
a73105b8 AQ |
1770 | full_table = true; |
1771 | else | |
1772 | full_table = false; | |
1773 | ||
1774 | /* In this version, fragmentation is not implemented, then | |
9cfc7bd6 SE |
1775 | * I'll send only one packet with as much TT entries as I can |
1776 | */ | |
a73105b8 | 1777 | if (!full_table) { |
807736f6 SE |
1778 | spin_lock_bh(&bat_priv->tt.last_changeset_lock); |
1779 | tt_len = bat_priv->tt.last_changeset_len; | |
96412690 | 1780 | tt_tot = tt_len / sizeof(struct batadv_tt_change); |
a73105b8 | 1781 | |
96412690 SE |
1782 | len = sizeof(*tt_response) + tt_len; |
1783 | skb = dev_alloc_skb(len + ETH_HLEN); | |
a73105b8 AQ |
1784 | if (!skb) |
1785 | goto unlock; | |
1786 | ||
1787 | skb_reserve(skb, ETH_HLEN); | |
c67893d1 SE |
1788 | packet_pos = skb_put(skb, len); |
1789 | tt_response = (struct batadv_tt_query_packet *)packet_pos; | |
a73105b8 AQ |
1790 | tt_response->ttvn = req_ttvn; |
1791 | tt_response->tt_data = htons(tt_tot); | |
1792 | ||
96412690 | 1793 | tt_buff = skb->data + sizeof(*tt_response); |
807736f6 SE |
1794 | memcpy(tt_buff, bat_priv->tt.last_changeset, |
1795 | bat_priv->tt.last_changeset_len); | |
1796 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); | |
a73105b8 | 1797 | } else { |
807736f6 | 1798 | tt_len = (uint16_t)atomic_read(&bat_priv->tt.local_entry_num); |
96412690 | 1799 | tt_len *= sizeof(struct batadv_tt_change); |
807736f6 | 1800 | ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn); |
a73105b8 | 1801 | |
a513088d | 1802 | skb = batadv_tt_response_fill_table(tt_len, ttvn, |
807736f6 | 1803 | bat_priv->tt.local_hash, |
a513088d SE |
1804 | primary_if, |
1805 | batadv_tt_local_valid_entry, | |
1806 | NULL); | |
a73105b8 AQ |
1807 | if (!skb) |
1808 | goto out; | |
1809 | ||
96412690 | 1810 | tt_response = (struct batadv_tt_query_packet *)skb->data; |
a73105b8 AQ |
1811 | } |
1812 | ||
acd34afa | 1813 | tt_response->header.packet_type = BATADV_TT_QUERY; |
7e071c79 | 1814 | tt_response->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 1815 | tt_response->header.ttl = BATADV_TTL; |
a73105b8 AQ |
1816 | memcpy(tt_response->src, primary_if->net_dev->dev_addr, ETH_ALEN); |
1817 | memcpy(tt_response->dst, tt_request->src, ETH_ALEN); | |
acd34afa | 1818 | tt_response->flags = BATADV_TT_RESPONSE; |
a73105b8 AQ |
1819 | |
1820 | if (full_table) | |
acd34afa | 1821 | tt_response->flags |= BATADV_TT_FULL_TABLE; |
a73105b8 | 1822 | |
39c75a51 | 1823 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1824 | "Sending TT_RESPONSE to %pM via %pM [%c]\n", |
1825 | orig_node->orig, neigh_node->addr, | |
acd34afa | 1826 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1827 | |
d69909d2 | 1828 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX); |
f8214865 | 1829 | |
9455e34c | 1830 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
a73105b8 AQ |
1831 | ret = true; |
1832 | goto out; | |
1833 | ||
1834 | unlock: | |
807736f6 | 1835 | spin_unlock_bh(&bat_priv->tt.last_changeset_lock); |
a73105b8 AQ |
1836 | out: |
1837 | if (orig_node) | |
7d211efc | 1838 | batadv_orig_node_free_ref(orig_node); |
a73105b8 | 1839 | if (neigh_node) |
7d211efc | 1840 | batadv_neigh_node_free_ref(neigh_node); |
a73105b8 | 1841 | if (primary_if) |
e5d89254 | 1842 | batadv_hardif_free_ref(primary_if); |
a73105b8 AQ |
1843 | if (!ret) |
1844 | kfree_skb(skb); | |
1845 | /* This packet was for me, so it doesn't need to be re-routed */ | |
1846 | return true; | |
1847 | } | |
1848 | ||
56303d34 | 1849 | bool batadv_send_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1850 | struct batadv_tt_query_packet *tt_request) |
a73105b8 | 1851 | { |
3193e8fd | 1852 | if (batadv_is_my_mac(tt_request->dst)) { |
20ff9d59 | 1853 | /* don't answer backbone gws! */ |
08adf151 | 1854 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src)) |
20ff9d59 SW |
1855 | return true; |
1856 | ||
a513088d | 1857 | return batadv_send_my_tt_response(bat_priv, tt_request); |
20ff9d59 | 1858 | } else { |
a513088d | 1859 | return batadv_send_other_tt_response(bat_priv, tt_request); |
20ff9d59 | 1860 | } |
a73105b8 AQ |
1861 | } |
1862 | ||
56303d34 SE |
1863 | static void _batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1864 | struct batadv_orig_node *orig_node, | |
96412690 | 1865 | struct batadv_tt_change *tt_change, |
a513088d | 1866 | uint16_t tt_num_changes, uint8_t ttvn) |
a73105b8 AQ |
1867 | { |
1868 | int i; | |
a513088d | 1869 | int roams; |
a73105b8 AQ |
1870 | |
1871 | for (i = 0; i < tt_num_changes; i++) { | |
acd34afa SE |
1872 | if ((tt_change + i)->flags & BATADV_TT_CLIENT_DEL) { |
1873 | roams = (tt_change + i)->flags & BATADV_TT_CLIENT_ROAM; | |
a513088d SE |
1874 | batadv_tt_global_del(bat_priv, orig_node, |
1875 | (tt_change + i)->addr, | |
d4f44692 AQ |
1876 | "tt removed by changes", |
1877 | roams); | |
08c36d3e | 1878 | } else { |
08c36d3e | 1879 | if (!batadv_tt_global_add(bat_priv, orig_node, |
d4f44692 AQ |
1880 | (tt_change + i)->addr, |
1881 | (tt_change + i)->flags, ttvn)) | |
a73105b8 AQ |
1882 | /* In case of problem while storing a |
1883 | * global_entry, we stop the updating | |
1884 | * procedure without committing the | |
1885 | * ttvn change. This will avoid to send | |
1886 | * corrupted data on tt_request | |
1887 | */ | |
1888 | return; | |
08c36d3e | 1889 | } |
a73105b8 | 1890 | } |
17071578 | 1891 | orig_node->tt_initialised = true; |
a73105b8 AQ |
1892 | } |
1893 | ||
56303d34 | 1894 | static void batadv_tt_fill_gtable(struct batadv_priv *bat_priv, |
96412690 | 1895 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 1896 | { |
56303d34 | 1897 | struct batadv_orig_node *orig_node = NULL; |
a73105b8 | 1898 | |
da641193 | 1899 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1900 | if (!orig_node) |
1901 | goto out; | |
1902 | ||
1903 | /* Purge the old table first.. */ | |
08c36d3e | 1904 | batadv_tt_global_del_orig(bat_priv, orig_node, "Received full table"); |
a73105b8 | 1905 | |
a513088d | 1906 | _batadv_tt_update_changes(bat_priv, orig_node, |
96412690 | 1907 | (struct batadv_tt_change *)(tt_response + 1), |
a513088d SE |
1908 | ntohs(tt_response->tt_data), |
1909 | tt_response->ttvn); | |
a73105b8 AQ |
1910 | |
1911 | spin_lock_bh(&orig_node->tt_buff_lock); | |
1912 | kfree(orig_node->tt_buff); | |
1913 | orig_node->tt_buff_len = 0; | |
1914 | orig_node->tt_buff = NULL; | |
1915 | spin_unlock_bh(&orig_node->tt_buff_lock); | |
1916 | ||
1917 | atomic_set(&orig_node->last_ttvn, tt_response->ttvn); | |
1918 | ||
1919 | out: | |
1920 | if (orig_node) | |
7d211efc | 1921 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
1922 | } |
1923 | ||
56303d34 SE |
1924 | static void batadv_tt_update_changes(struct batadv_priv *bat_priv, |
1925 | struct batadv_orig_node *orig_node, | |
a513088d | 1926 | uint16_t tt_num_changes, uint8_t ttvn, |
96412690 | 1927 | struct batadv_tt_change *tt_change) |
a73105b8 | 1928 | { |
a513088d SE |
1929 | _batadv_tt_update_changes(bat_priv, orig_node, tt_change, |
1930 | tt_num_changes, ttvn); | |
a73105b8 | 1931 | |
a513088d SE |
1932 | batadv_tt_save_orig_buffer(bat_priv, orig_node, |
1933 | (unsigned char *)tt_change, tt_num_changes); | |
a73105b8 AQ |
1934 | atomic_set(&orig_node->last_ttvn, ttvn); |
1935 | } | |
1936 | ||
56303d34 | 1937 | bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr) |
a73105b8 | 1938 | { |
56303d34 | 1939 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
7683fdc1 | 1940 | bool ret = false; |
a73105b8 | 1941 | |
a513088d | 1942 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, addr); |
7683fdc1 AQ |
1943 | if (!tt_local_entry) |
1944 | goto out; | |
058d0e26 | 1945 | /* Check if the client has been logically deleted (but is kept for |
9cfc7bd6 SE |
1946 | * consistency purpose) |
1947 | */ | |
acd34afa | 1948 | if (tt_local_entry->common.flags & BATADV_TT_CLIENT_PENDING) |
058d0e26 | 1949 | goto out; |
7683fdc1 AQ |
1950 | ret = true; |
1951 | out: | |
a73105b8 | 1952 | if (tt_local_entry) |
a513088d | 1953 | batadv_tt_local_entry_free_ref(tt_local_entry); |
7683fdc1 | 1954 | return ret; |
a73105b8 AQ |
1955 | } |
1956 | ||
56303d34 | 1957 | void batadv_handle_tt_response(struct batadv_priv *bat_priv, |
96412690 | 1958 | struct batadv_tt_query_packet *tt_response) |
a73105b8 | 1959 | { |
56303d34 SE |
1960 | struct batadv_tt_req_node *node, *safe; |
1961 | struct batadv_orig_node *orig_node = NULL; | |
96412690 | 1962 | struct batadv_tt_change *tt_change; |
a73105b8 | 1963 | |
39c75a51 | 1964 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
1965 | "Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n", |
1966 | tt_response->src, tt_response->ttvn, | |
1967 | ntohs(tt_response->tt_data), | |
acd34afa | 1968 | (tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.')); |
a73105b8 | 1969 | |
20ff9d59 | 1970 | /* we should have never asked a backbone gw */ |
08adf151 | 1971 | if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_response->src)) |
20ff9d59 SW |
1972 | goto out; |
1973 | ||
da641193 | 1974 | orig_node = batadv_orig_hash_find(bat_priv, tt_response->src); |
a73105b8 AQ |
1975 | if (!orig_node) |
1976 | goto out; | |
1977 | ||
96412690 | 1978 | if (tt_response->flags & BATADV_TT_FULL_TABLE) { |
a513088d | 1979 | batadv_tt_fill_gtable(bat_priv, tt_response); |
96412690 SE |
1980 | } else { |
1981 | tt_change = (struct batadv_tt_change *)(tt_response + 1); | |
a513088d SE |
1982 | batadv_tt_update_changes(bat_priv, orig_node, |
1983 | ntohs(tt_response->tt_data), | |
96412690 SE |
1984 | tt_response->ttvn, tt_change); |
1985 | } | |
a73105b8 AQ |
1986 | |
1987 | /* Delete the tt_req_node from pending tt_requests list */ | |
807736f6 SE |
1988 | spin_lock_bh(&bat_priv->tt.req_list_lock); |
1989 | list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { | |
1eda58bf | 1990 | if (!batadv_compare_eth(node->addr, tt_response->src)) |
a73105b8 AQ |
1991 | continue; |
1992 | list_del(&node->list); | |
1993 | kfree(node); | |
1994 | } | |
807736f6 | 1995 | spin_unlock_bh(&bat_priv->tt.req_list_lock); |
a73105b8 AQ |
1996 | |
1997 | /* Recalculate the CRC for this orig_node and store it */ | |
a513088d | 1998 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
cc47f66e | 1999 | /* Roaming phase is over: tables are in sync again. I can |
9cfc7bd6 SE |
2000 | * unset the flag |
2001 | */ | |
cc47f66e | 2002 | orig_node->tt_poss_change = false; |
a73105b8 AQ |
2003 | out: |
2004 | if (orig_node) | |
7d211efc | 2005 | batadv_orig_node_free_ref(orig_node); |
a73105b8 AQ |
2006 | } |
2007 | ||
56303d34 | 2008 | int batadv_tt_init(struct batadv_priv *bat_priv) |
a73105b8 | 2009 | { |
5346c35e | 2010 | int ret; |
a73105b8 | 2011 | |
a513088d | 2012 | ret = batadv_tt_local_init(bat_priv); |
5346c35e SE |
2013 | if (ret < 0) |
2014 | return ret; | |
2015 | ||
a513088d | 2016 | ret = batadv_tt_global_init(bat_priv); |
5346c35e SE |
2017 | if (ret < 0) |
2018 | return ret; | |
a73105b8 | 2019 | |
a513088d | 2020 | batadv_tt_start_timer(bat_priv); |
a73105b8 AQ |
2021 | |
2022 | return 1; | |
2023 | } | |
2024 | ||
56303d34 | 2025 | static void batadv_tt_roam_list_free(struct batadv_priv *bat_priv) |
a73105b8 | 2026 | { |
56303d34 | 2027 | struct batadv_tt_roam_node *node, *safe; |
a73105b8 | 2028 | |
807736f6 | 2029 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
a73105b8 | 2030 | |
807736f6 | 2031 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { |
cc47f66e AQ |
2032 | list_del(&node->list); |
2033 | kfree(node); | |
2034 | } | |
2035 | ||
807736f6 | 2036 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2037 | } |
2038 | ||
56303d34 | 2039 | static void batadv_tt_roam_purge(struct batadv_priv *bat_priv) |
cc47f66e | 2040 | { |
56303d34 | 2041 | struct batadv_tt_roam_node *node, *safe; |
cc47f66e | 2042 | |
807736f6 SE |
2043 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
2044 | list_for_each_entry_safe(node, safe, &bat_priv->tt.roam_list, list) { | |
42d0b044 SE |
2045 | if (!batadv_has_timed_out(node->first_time, |
2046 | BATADV_ROAMING_MAX_TIME)) | |
cc47f66e AQ |
2047 | continue; |
2048 | ||
2049 | list_del(&node->list); | |
2050 | kfree(node); | |
2051 | } | |
807736f6 | 2052 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2053 | } |
2054 | ||
2055 | /* This function checks whether the client already reached the | |
2056 | * maximum number of possible roaming phases. In this case the ROAMING_ADV | |
2057 | * will not be sent. | |
2058 | * | |
9cfc7bd6 SE |
2059 | * returns true if the ROAMING_ADV can be sent, false otherwise |
2060 | */ | |
56303d34 | 2061 | static bool batadv_tt_check_roam_count(struct batadv_priv *bat_priv, |
a513088d | 2062 | uint8_t *client) |
cc47f66e | 2063 | { |
56303d34 | 2064 | struct batadv_tt_roam_node *tt_roam_node; |
cc47f66e AQ |
2065 | bool ret = false; |
2066 | ||
807736f6 | 2067 | spin_lock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e | 2068 | /* The new tt_req will be issued only if I'm not waiting for a |
9cfc7bd6 SE |
2069 | * reply from the same orig_node yet |
2070 | */ | |
807736f6 | 2071 | list_for_each_entry(tt_roam_node, &bat_priv->tt.roam_list, list) { |
1eda58bf | 2072 | if (!batadv_compare_eth(tt_roam_node->addr, client)) |
cc47f66e AQ |
2073 | continue; |
2074 | ||
1eda58bf | 2075 | if (batadv_has_timed_out(tt_roam_node->first_time, |
42d0b044 | 2076 | BATADV_ROAMING_MAX_TIME)) |
cc47f66e AQ |
2077 | continue; |
2078 | ||
3e34819e | 2079 | if (!batadv_atomic_dec_not_zero(&tt_roam_node->counter)) |
cc47f66e AQ |
2080 | /* Sorry, you roamed too many times! */ |
2081 | goto unlock; | |
2082 | ret = true; | |
2083 | break; | |
2084 | } | |
2085 | ||
2086 | if (!ret) { | |
2087 | tt_roam_node = kmalloc(sizeof(*tt_roam_node), GFP_ATOMIC); | |
2088 | if (!tt_roam_node) | |
2089 | goto unlock; | |
2090 | ||
2091 | tt_roam_node->first_time = jiffies; | |
42d0b044 SE |
2092 | atomic_set(&tt_roam_node->counter, |
2093 | BATADV_ROAMING_MAX_COUNT - 1); | |
cc47f66e AQ |
2094 | memcpy(tt_roam_node->addr, client, ETH_ALEN); |
2095 | ||
807736f6 | 2096 | list_add(&tt_roam_node->list, &bat_priv->tt.roam_list); |
cc47f66e AQ |
2097 | ret = true; |
2098 | } | |
2099 | ||
2100 | unlock: | |
807736f6 | 2101 | spin_unlock_bh(&bat_priv->tt.roam_list_lock); |
cc47f66e AQ |
2102 | return ret; |
2103 | } | |
2104 | ||
56303d34 SE |
2105 | static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client, |
2106 | struct batadv_orig_node *orig_node) | |
cc47f66e | 2107 | { |
56303d34 | 2108 | struct batadv_neigh_node *neigh_node = NULL; |
cc47f66e | 2109 | struct sk_buff *skb = NULL; |
96412690 | 2110 | struct batadv_roam_adv_packet *roam_adv_packet; |
cc47f66e | 2111 | int ret = 1; |
56303d34 | 2112 | struct batadv_hard_iface *primary_if; |
96412690 | 2113 | size_t len = sizeof(*roam_adv_packet); |
cc47f66e AQ |
2114 | |
2115 | /* before going on we have to check whether the client has | |
9cfc7bd6 SE |
2116 | * already roamed to us too many times |
2117 | */ | |
a513088d | 2118 | if (!batadv_tt_check_roam_count(bat_priv, client)) |
cc47f66e AQ |
2119 | goto out; |
2120 | ||
96412690 | 2121 | skb = dev_alloc_skb(sizeof(*roam_adv_packet) + ETH_HLEN); |
cc47f66e AQ |
2122 | if (!skb) |
2123 | goto out; | |
2124 | ||
2125 | skb_reserve(skb, ETH_HLEN); | |
2126 | ||
96412690 | 2127 | roam_adv_packet = (struct batadv_roam_adv_packet *)skb_put(skb, len); |
cc47f66e | 2128 | |
acd34afa | 2129 | roam_adv_packet->header.packet_type = BATADV_ROAM_ADV; |
7e071c79 | 2130 | roam_adv_packet->header.version = BATADV_COMPAT_VERSION; |
42d0b044 | 2131 | roam_adv_packet->header.ttl = BATADV_TTL; |
162d549c | 2132 | roam_adv_packet->reserved = 0; |
e5d89254 | 2133 | primary_if = batadv_primary_if_get_selected(bat_priv); |
cc47f66e AQ |
2134 | if (!primary_if) |
2135 | goto out; | |
2136 | memcpy(roam_adv_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN); | |
e5d89254 | 2137 | batadv_hardif_free_ref(primary_if); |
cc47f66e AQ |
2138 | memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN); |
2139 | memcpy(roam_adv_packet->client, client, ETH_ALEN); | |
2140 | ||
7d211efc | 2141 | neigh_node = batadv_orig_node_get_router(orig_node); |
cc47f66e AQ |
2142 | if (!neigh_node) |
2143 | goto out; | |
2144 | ||
39c75a51 | 2145 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2146 | "Sending ROAMING_ADV to %pM (client %pM) via %pM\n", |
2147 | orig_node->orig, client, neigh_node->addr); | |
cc47f66e | 2148 | |
d69909d2 | 2149 | batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX); |
f8214865 | 2150 | |
9455e34c | 2151 | batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr); |
cc47f66e AQ |
2152 | ret = 0; |
2153 | ||
2154 | out: | |
2155 | if (neigh_node) | |
7d211efc | 2156 | batadv_neigh_node_free_ref(neigh_node); |
cc47f66e AQ |
2157 | if (ret) |
2158 | kfree_skb(skb); | |
2159 | return; | |
a73105b8 AQ |
2160 | } |
2161 | ||
a513088d | 2162 | static void batadv_tt_purge(struct work_struct *work) |
a73105b8 | 2163 | { |
56303d34 | 2164 | struct delayed_work *delayed_work; |
807736f6 | 2165 | struct batadv_priv_tt *priv_tt; |
56303d34 SE |
2166 | struct batadv_priv *bat_priv; |
2167 | ||
2168 | delayed_work = container_of(work, struct delayed_work, work); | |
807736f6 SE |
2169 | priv_tt = container_of(delayed_work, struct batadv_priv_tt, work); |
2170 | bat_priv = container_of(priv_tt, struct batadv_priv, tt); | |
a73105b8 | 2171 | |
a513088d | 2172 | batadv_tt_local_purge(bat_priv); |
30cfd02b | 2173 | batadv_tt_global_purge(bat_priv); |
a513088d SE |
2174 | batadv_tt_req_purge(bat_priv); |
2175 | batadv_tt_roam_purge(bat_priv); | |
a73105b8 | 2176 | |
a513088d | 2177 | batadv_tt_start_timer(bat_priv); |
a73105b8 | 2178 | } |
cc47f66e | 2179 | |
56303d34 | 2180 | void batadv_tt_free(struct batadv_priv *bat_priv) |
cc47f66e | 2181 | { |
807736f6 | 2182 | cancel_delayed_work_sync(&bat_priv->tt.work); |
cc47f66e | 2183 | |
a513088d SE |
2184 | batadv_tt_local_table_free(bat_priv); |
2185 | batadv_tt_global_table_free(bat_priv); | |
2186 | batadv_tt_req_list_free(bat_priv); | |
2187 | batadv_tt_changes_list_free(bat_priv); | |
2188 | batadv_tt_roam_list_free(bat_priv); | |
cc47f66e | 2189 | |
807736f6 | 2190 | kfree(bat_priv->tt.last_changeset); |
cc47f66e | 2191 | } |
058d0e26 | 2192 | |
697f2531 | 2193 | /* This function will enable or disable the specified flags for all the entries |
9cfc7bd6 SE |
2194 | * in the given hash table and returns the number of modified entries |
2195 | */ | |
5bf74e9c SE |
2196 | static uint16_t batadv_tt_set_flags(struct batadv_hashtable *hash, |
2197 | uint16_t flags, bool enable) | |
058d0e26 | 2198 | { |
c90681b8 | 2199 | uint32_t i; |
697f2531 | 2200 | uint16_t changed_num = 0; |
058d0e26 AQ |
2201 | struct hlist_head *head; |
2202 | struct hlist_node *node; | |
56303d34 | 2203 | struct batadv_tt_common_entry *tt_common_entry; |
058d0e26 AQ |
2204 | |
2205 | if (!hash) | |
697f2531 | 2206 | goto out; |
058d0e26 AQ |
2207 | |
2208 | for (i = 0; i < hash->size; i++) { | |
2209 | head = &hash->table[i]; | |
2210 | ||
2211 | rcu_read_lock(); | |
48100bac | 2212 | hlist_for_each_entry_rcu(tt_common_entry, node, |
058d0e26 | 2213 | head, hash_entry) { |
697f2531 AQ |
2214 | if (enable) { |
2215 | if ((tt_common_entry->flags & flags) == flags) | |
2216 | continue; | |
2217 | tt_common_entry->flags |= flags; | |
2218 | } else { | |
2219 | if (!(tt_common_entry->flags & flags)) | |
2220 | continue; | |
2221 | tt_common_entry->flags &= ~flags; | |
2222 | } | |
2223 | changed_num++; | |
058d0e26 AQ |
2224 | } |
2225 | rcu_read_unlock(); | |
2226 | } | |
697f2531 AQ |
2227 | out: |
2228 | return changed_num; | |
058d0e26 AQ |
2229 | } |
2230 | ||
acd34afa | 2231 | /* Purge out all the tt local entries marked with BATADV_TT_CLIENT_PENDING */ |
56303d34 | 2232 | static void batadv_tt_local_purge_pending_clients(struct batadv_priv *bat_priv) |
058d0e26 | 2233 | { |
807736f6 | 2234 | struct batadv_hashtable *hash = bat_priv->tt.local_hash; |
56303d34 SE |
2235 | struct batadv_tt_common_entry *tt_common; |
2236 | struct batadv_tt_local_entry *tt_local; | |
058d0e26 AQ |
2237 | struct hlist_node *node, *node_tmp; |
2238 | struct hlist_head *head; | |
2239 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
c90681b8 | 2240 | uint32_t i; |
058d0e26 AQ |
2241 | |
2242 | if (!hash) | |
2243 | return; | |
2244 | ||
2245 | for (i = 0; i < hash->size; i++) { | |
2246 | head = &hash->table[i]; | |
2247 | list_lock = &hash->list_locks[i]; | |
2248 | ||
2249 | spin_lock_bh(list_lock); | |
acd34afa SE |
2250 | hlist_for_each_entry_safe(tt_common, node, node_tmp, head, |
2251 | hash_entry) { | |
2252 | if (!(tt_common->flags & BATADV_TT_CLIENT_PENDING)) | |
058d0e26 AQ |
2253 | continue; |
2254 | ||
39c75a51 | 2255 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2256 | "Deleting local tt entry (%pM): pending\n", |
acd34afa | 2257 | tt_common->addr); |
058d0e26 | 2258 | |
807736f6 | 2259 | atomic_dec(&bat_priv->tt.local_entry_num); |
058d0e26 | 2260 | hlist_del_rcu(node); |
56303d34 SE |
2261 | tt_local = container_of(tt_common, |
2262 | struct batadv_tt_local_entry, | |
2263 | common); | |
2264 | batadv_tt_local_entry_free_ref(tt_local); | |
058d0e26 AQ |
2265 | } |
2266 | spin_unlock_bh(list_lock); | |
2267 | } | |
2268 | ||
2269 | } | |
2270 | ||
56303d34 | 2271 | static int batadv_tt_commit_changes(struct batadv_priv *bat_priv, |
a513088d SE |
2272 | unsigned char **packet_buff, |
2273 | int *packet_buff_len, int packet_min_len) | |
058d0e26 | 2274 | { |
be9aa4c1 ML |
2275 | uint16_t changed_num = 0; |
2276 | ||
807736f6 | 2277 | if (atomic_read(&bat_priv->tt.local_changes) < 1) |
be9aa4c1 ML |
2278 | return -ENOENT; |
2279 | ||
807736f6 | 2280 | changed_num = batadv_tt_set_flags(bat_priv->tt.local_hash, |
acd34afa | 2281 | BATADV_TT_CLIENT_NEW, false); |
be9aa4c1 ML |
2282 | |
2283 | /* all reset entries have to be counted as local entries */ | |
807736f6 | 2284 | atomic_add(changed_num, &bat_priv->tt.local_entry_num); |
a513088d | 2285 | batadv_tt_local_purge_pending_clients(bat_priv); |
807736f6 | 2286 | bat_priv->tt.local_crc = batadv_tt_local_crc(bat_priv); |
058d0e26 AQ |
2287 | |
2288 | /* Increment the TTVN only once per OGM interval */ | |
807736f6 | 2289 | atomic_inc(&bat_priv->tt.vn); |
39c75a51 | 2290 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf | 2291 | "Local changes committed, updating to ttvn %u\n", |
807736f6 SE |
2292 | (uint8_t)atomic_read(&bat_priv->tt.vn)); |
2293 | bat_priv->tt.poss_change = false; | |
be9aa4c1 ML |
2294 | |
2295 | /* reset the sending counter */ | |
807736f6 | 2296 | atomic_set(&bat_priv->tt.ogm_append_cnt, BATADV_TT_OGM_APPEND_MAX); |
be9aa4c1 | 2297 | |
a513088d SE |
2298 | return batadv_tt_changes_fill_buff(bat_priv, packet_buff, |
2299 | packet_buff_len, packet_min_len); | |
be9aa4c1 ML |
2300 | } |
2301 | ||
2302 | /* when calling this function (hard_iface == primary_if) has to be true */ | |
56303d34 | 2303 | int batadv_tt_append_diff(struct batadv_priv *bat_priv, |
be9aa4c1 ML |
2304 | unsigned char **packet_buff, int *packet_buff_len, |
2305 | int packet_min_len) | |
2306 | { | |
2307 | int tt_num_changes; | |
2308 | ||
2309 | /* if at least one change happened */ | |
a513088d SE |
2310 | tt_num_changes = batadv_tt_commit_changes(bat_priv, packet_buff, |
2311 | packet_buff_len, | |
2312 | packet_min_len); | |
be9aa4c1 ML |
2313 | |
2314 | /* if the changes have been sent often enough */ | |
2315 | if ((tt_num_changes < 0) && | |
807736f6 | 2316 | (!batadv_atomic_dec_not_zero(&bat_priv->tt.ogm_append_cnt))) { |
a513088d SE |
2317 | batadv_tt_realloc_packet_buff(packet_buff, packet_buff_len, |
2318 | packet_min_len, packet_min_len); | |
be9aa4c1 ML |
2319 | tt_num_changes = 0; |
2320 | } | |
2321 | ||
2322 | return tt_num_changes; | |
058d0e26 | 2323 | } |
59b699cd | 2324 | |
56303d34 | 2325 | bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src, |
08c36d3e | 2326 | uint8_t *dst) |
59b699cd | 2327 | { |
56303d34 SE |
2328 | struct batadv_tt_local_entry *tt_local_entry = NULL; |
2329 | struct batadv_tt_global_entry *tt_global_entry = NULL; | |
5870adc6 | 2330 | bool ret = false; |
59b699cd AQ |
2331 | |
2332 | if (!atomic_read(&bat_priv->ap_isolation)) | |
5870adc6 | 2333 | goto out; |
59b699cd | 2334 | |
a513088d | 2335 | tt_local_entry = batadv_tt_local_hash_find(bat_priv, dst); |
59b699cd AQ |
2336 | if (!tt_local_entry) |
2337 | goto out; | |
2338 | ||
a513088d | 2339 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, src); |
59b699cd AQ |
2340 | if (!tt_global_entry) |
2341 | goto out; | |
2342 | ||
1f129fef | 2343 | if (!_batadv_is_ap_isolated(tt_local_entry, tt_global_entry)) |
59b699cd AQ |
2344 | goto out; |
2345 | ||
5870adc6 | 2346 | ret = true; |
59b699cd AQ |
2347 | |
2348 | out: | |
2349 | if (tt_global_entry) | |
a513088d | 2350 | batadv_tt_global_entry_free_ref(tt_global_entry); |
59b699cd | 2351 | if (tt_local_entry) |
a513088d | 2352 | batadv_tt_local_entry_free_ref(tt_local_entry); |
59b699cd AQ |
2353 | return ret; |
2354 | } | |
a943cac1 | 2355 | |
56303d34 SE |
2356 | void batadv_tt_update_orig(struct batadv_priv *bat_priv, |
2357 | struct batadv_orig_node *orig_node, | |
08c36d3e SE |
2358 | const unsigned char *tt_buff, uint8_t tt_num_changes, |
2359 | uint8_t ttvn, uint16_t tt_crc) | |
a943cac1 ML |
2360 | { |
2361 | uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn); | |
2362 | bool full_table = true; | |
96412690 | 2363 | struct batadv_tt_change *tt_change; |
a943cac1 | 2364 | |
20ff9d59 | 2365 | /* don't care about a backbone gateways updates. */ |
08adf151 | 2366 | if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig)) |
20ff9d59 SW |
2367 | return; |
2368 | ||
17071578 | 2369 | /* orig table not initialised AND first diff is in the OGM OR the ttvn |
9cfc7bd6 SE |
2370 | * increased by one -> we can apply the attached changes |
2371 | */ | |
17071578 AQ |
2372 | if ((!orig_node->tt_initialised && ttvn == 1) || |
2373 | ttvn - orig_ttvn == 1) { | |
a943cac1 | 2374 | /* the OGM could not contain the changes due to their size or |
42d0b044 SE |
2375 | * because they have already been sent BATADV_TT_OGM_APPEND_MAX |
2376 | * times. | |
9cfc7bd6 SE |
2377 | * In this case send a tt request |
2378 | */ | |
a943cac1 ML |
2379 | if (!tt_num_changes) { |
2380 | full_table = false; | |
2381 | goto request_table; | |
2382 | } | |
2383 | ||
96412690 | 2384 | tt_change = (struct batadv_tt_change *)tt_buff; |
a513088d | 2385 | batadv_tt_update_changes(bat_priv, orig_node, tt_num_changes, |
96412690 | 2386 | ttvn, tt_change); |
a943cac1 ML |
2387 | |
2388 | /* Even if we received the precomputed crc with the OGM, we | |
2389 | * prefer to recompute it to spot any possible inconsistency | |
9cfc7bd6 SE |
2390 | * in the global table |
2391 | */ | |
a513088d | 2392 | orig_node->tt_crc = batadv_tt_global_crc(bat_priv, orig_node); |
a943cac1 ML |
2393 | |
2394 | /* The ttvn alone is not enough to guarantee consistency | |
2395 | * because a single value could represent different states | |
2396 | * (due to the wrap around). Thus a node has to check whether | |
2397 | * the resulting table (after applying the changes) is still | |
2398 | * consistent or not. E.g. a node could disconnect while its | |
2399 | * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case | |
2400 | * checking the CRC value is mandatory to detect the | |
9cfc7bd6 SE |
2401 | * inconsistency |
2402 | */ | |
a943cac1 ML |
2403 | if (orig_node->tt_crc != tt_crc) |
2404 | goto request_table; | |
2405 | ||
2406 | /* Roaming phase is over: tables are in sync again. I can | |
9cfc7bd6 SE |
2407 | * unset the flag |
2408 | */ | |
a943cac1 ML |
2409 | orig_node->tt_poss_change = false; |
2410 | } else { | |
2411 | /* if we missed more than one change or our tables are not | |
9cfc7bd6 SE |
2412 | * in sync anymore -> request fresh tt data |
2413 | */ | |
17071578 AQ |
2414 | if (!orig_node->tt_initialised || ttvn != orig_ttvn || |
2415 | orig_node->tt_crc != tt_crc) { | |
a943cac1 | 2416 | request_table: |
39c75a51 | 2417 | batadv_dbg(BATADV_DBG_TT, bat_priv, |
1eda58bf SE |
2418 | "TT inconsistency for %pM. Need to retrieve the correct information (ttvn: %u last_ttvn: %u crc: %u last_crc: %u num_changes: %u)\n", |
2419 | orig_node->orig, ttvn, orig_ttvn, tt_crc, | |
2420 | orig_node->tt_crc, tt_num_changes); | |
a513088d SE |
2421 | batadv_send_tt_request(bat_priv, orig_node, ttvn, |
2422 | tt_crc, full_table); | |
a943cac1 ML |
2423 | return; |
2424 | } | |
2425 | } | |
2426 | } | |
3275e7cc AQ |
2427 | |
2428 | /* returns true whether we know that the client has moved from its old | |
2429 | * originator to another one. This entry is kept is still kept for consistency | |
2430 | * purposes | |
2431 | */ | |
56303d34 | 2432 | bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv, |
08c36d3e | 2433 | uint8_t *addr) |
3275e7cc | 2434 | { |
56303d34 | 2435 | struct batadv_tt_global_entry *tt_global_entry; |
3275e7cc AQ |
2436 | bool ret = false; |
2437 | ||
a513088d | 2438 | tt_global_entry = batadv_tt_global_hash_find(bat_priv, addr); |
3275e7cc AQ |
2439 | if (!tt_global_entry) |
2440 | goto out; | |
2441 | ||
9f9ff08d | 2442 | ret = !!(tt_global_entry->common.flags & BATADV_TT_CLIENT_ROAM); |
a513088d | 2443 | batadv_tt_global_entry_free_ref(tt_global_entry); |
3275e7cc AQ |
2444 | out: |
2445 | return ret; | |
2446 | } | |
30cfd02b AQ |
2447 | |
2448 | bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv, | |
2449 | struct batadv_orig_node *orig_node, | |
2450 | const unsigned char *addr) | |
2451 | { | |
2452 | bool ret = false; | |
2453 | ||
2454 | if (!batadv_tt_global_add(bat_priv, orig_node, addr, | |
2455 | BATADV_TT_CLIENT_TEMP, | |
2456 | atomic_read(&orig_node->last_ttvn))) | |
2457 | goto out; | |
2458 | ||
2459 | batadv_dbg(BATADV_DBG_TT, bat_priv, | |
2460 | "Added temporary global client (addr: %pM orig: %pM)\n", | |
2461 | addr, orig_node->orig); | |
2462 | ret = true; | |
2463 | out: | |
2464 | return ret; | |
2465 | } |