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e19f9759 | 1 | /* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors: |
fc957275 ML |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
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 | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
fc957275 ML |
16 | */ |
17 | ||
18 | #include "main.h" | |
fc957275 | 19 | #include "translation-table.h" |
fc957275 ML |
20 | #include "originator.h" |
21 | #include "routing.h" | |
22 | #include "gateway_common.h" | |
23 | #include "gateway_client.h" | |
24 | #include "hard-interface.h" | |
25 | #include "send.h" | |
1c280471 | 26 | #include "bat_algo.h" |
d56b1705 | 27 | #include "network-coding.h" |
fc957275 | 28 | |
791c2a2d | 29 | /** |
95298a91 | 30 | * enum batadv_dup_status - duplicate status |
791c2a2d AQ |
31 | * @BATADV_NO_DUP: the packet is a duplicate |
32 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the | |
33 | * neighbor) | |
34 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
35 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
36 | */ | |
37 | enum batadv_dup_status { | |
38 | BATADV_NO_DUP = 0, | |
39 | BATADV_ORIG_DUP, | |
40 | BATADV_NEIGH_DUP, | |
41 | BATADV_PROTECTED, | |
42 | }; | |
43 | ||
24a5deeb AQ |
44 | /** |
45 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
46 | * @lq_recv: pointer to the ring buffer | |
47 | * @lq_index: index to store the value at | |
48 | * @value: value to store in the ring buffer | |
49 | */ | |
50 | static void batadv_ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, | |
51 | uint8_t value) | |
52 | { | |
53 | lq_recv[*lq_index] = value; | |
54 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
55 | } | |
56 | ||
57 | /** | |
58 | * batadv_ring_buffer_set - compute the average of all non-zero values stored | |
59 | * in the given ring buffer | |
60 | * @lq_recv: pointer to the ring buffer | |
61 | * | |
62 | * Returns computed average value. | |
63 | */ | |
64 | static uint8_t batadv_ring_buffer_avg(const uint8_t lq_recv[]) | |
65 | { | |
66 | const uint8_t *ptr; | |
67 | uint16_t count = 0, i = 0, sum = 0; | |
68 | ||
69 | ptr = lq_recv; | |
70 | ||
71 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
72 | if (*ptr != 0) { | |
73 | count++; | |
74 | sum += *ptr; | |
75 | } | |
76 | ||
77 | i++; | |
78 | ptr++; | |
79 | } | |
80 | ||
81 | if (count == 0) | |
82 | return 0; | |
83 | ||
84 | return (uint8_t)(sum / count); | |
85 | } | |
d98cae64 | 86 | |
d0015fdd AQ |
87 | /** |
88 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
89 | * orig_node | |
90 | * @orig_node: the orig_node for which the resources have to be free'd | |
91 | */ | |
92 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
93 | { | |
94 | kfree(orig_node->bat_iv.bcast_own); | |
95 | kfree(orig_node->bat_iv.bcast_own_sum); | |
96 | } | |
97 | ||
98 | /** | |
99 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
100 | * include the new hard-interface | |
101 | * @orig_node: the orig_node that has to be changed | |
102 | * @max_if_num: the current amount of interfaces | |
103 | * | |
104 | * Returns 0 on success, a negative error code otherwise. | |
105 | */ | |
106 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
107 | int max_if_num) | |
108 | { | |
109 | void *data_ptr; | |
0185dda6 | 110 | size_t old_size; |
d0015fdd AQ |
111 | int ret = -ENOMEM; |
112 | ||
113 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
114 | ||
d0015fdd | 115 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
116 | data_ptr = kmalloc_array(max_if_num, |
117 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
118 | GFP_ATOMIC); | |
d0015fdd AQ |
119 | if (!data_ptr) |
120 | goto unlock; | |
121 | ||
122 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
123 | kfree(orig_node->bat_iv.bcast_own); | |
124 | orig_node->bat_iv.bcast_own = data_ptr; | |
125 | ||
0185dda6 | 126 | data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC); |
d0015fdd AQ |
127 | if (!data_ptr) { |
128 | kfree(orig_node->bat_iv.bcast_own); | |
129 | goto unlock; | |
130 | } | |
131 | ||
132 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
133 | (max_if_num - 1) * sizeof(uint8_t)); | |
134 | kfree(orig_node->bat_iv.bcast_own_sum); | |
135 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
136 | ||
137 | ret = 0; | |
138 | ||
139 | unlock: | |
140 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
145 | /** | |
146 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
147 | * exclude the removed interface | |
148 | * @orig_node: the orig_node that has to be changed | |
149 | * @max_if_num: the current amount of interfaces | |
150 | * @del_if_num: the index of the interface being removed | |
151 | * | |
152 | * Returns 0 on success, a negative error code otherwise. | |
153 | */ | |
154 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
155 | int max_if_num, int del_if_num) | |
156 | { | |
157 | int chunk_size, ret = -ENOMEM, if_offset; | |
158 | void *data_ptr = NULL; | |
159 | ||
160 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
161 | ||
162 | /* last interface was removed */ | |
163 | if (max_if_num == 0) | |
164 | goto free_bcast_own; | |
165 | ||
166 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 167 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd AQ |
168 | if (!data_ptr) |
169 | goto unlock; | |
170 | ||
171 | /* copy first part */ | |
172 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); | |
173 | ||
174 | /* copy second part */ | |
175 | memcpy((char *)data_ptr + del_if_num * chunk_size, | |
176 | orig_node->bat_iv.bcast_own + ((del_if_num + 1) * chunk_size), | |
177 | (max_if_num - del_if_num) * chunk_size); | |
178 | ||
179 | free_bcast_own: | |
180 | kfree(orig_node->bat_iv.bcast_own); | |
181 | orig_node->bat_iv.bcast_own = data_ptr; | |
182 | ||
183 | if (max_if_num == 0) | |
184 | goto free_own_sum; | |
185 | ||
0185dda6 | 186 | data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC); |
d0015fdd AQ |
187 | if (!data_ptr) { |
188 | kfree(orig_node->bat_iv.bcast_own); | |
189 | goto unlock; | |
190 | } | |
191 | ||
192 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
193 | del_if_num * sizeof(uint8_t)); | |
194 | ||
195 | if_offset = (del_if_num + 1) * sizeof(uint8_t); | |
196 | memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t), | |
197 | orig_node->bat_iv.bcast_own_sum + if_offset, | |
198 | (max_if_num - del_if_num) * sizeof(uint8_t)); | |
199 | ||
200 | free_own_sum: | |
201 | kfree(orig_node->bat_iv.bcast_own_sum); | |
202 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
203 | ||
204 | ret = 0; | |
205 | unlock: | |
206 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
207 | ||
208 | return ret; | |
209 | } | |
210 | ||
bbad0a5e AQ |
211 | /** |
212 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
213 | * @bat_priv: the bat priv with all the soft interface information | |
214 | * @addr: mac address of the originator | |
215 | * | |
216 | * Returns the originator object corresponding to the passed mac address or NULL | |
217 | * on failure. | |
218 | * If the object does not exists it is created an initialised. | |
219 | */ | |
220 | static struct batadv_orig_node * | |
221 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const uint8_t *addr) | |
222 | { | |
223 | struct batadv_orig_node *orig_node; | |
224 | int size, hash_added; | |
225 | ||
226 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
227 | if (orig_node) | |
228 | return orig_node; | |
229 | ||
230 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
231 | if (!orig_node) | |
232 | return NULL; | |
233 | ||
234 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
235 | ||
236 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
237 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
238 | if (!orig_node->bat_iv.bcast_own) | |
239 | goto free_orig_node; | |
240 | ||
241 | size = bat_priv->num_ifaces * sizeof(uint8_t); | |
242 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); | |
243 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 244 | goto free_orig_node; |
bbad0a5e AQ |
245 | |
246 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
247 | batadv_choose_orig, orig_node, | |
248 | &orig_node->hash_entry); | |
249 | if (hash_added != 0) | |
a5a5cb8c | 250 | goto free_orig_node; |
bbad0a5e AQ |
251 | |
252 | return orig_node; | |
253 | ||
bbad0a5e | 254 | free_orig_node: |
b2262df7 SW |
255 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
256 | batadv_orig_node_free_ref(orig_node); | |
bbad0a5e AQ |
257 | batadv_orig_node_free_ref(orig_node); |
258 | ||
259 | return NULL; | |
260 | } | |
261 | ||
56303d34 SE |
262 | static struct batadv_neigh_node * |
263 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
264 | const uint8_t *neigh_addr, | |
265 | struct batadv_orig_node *orig_node, | |
863dd7a8 | 266 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 267 | { |
0538f759 | 268 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
08bf0ed2 | 269 | struct batadv_neigh_node *neigh_node, *tmp_neigh_node; |
7ae8b285 | 270 | |
0538f759 | 271 | neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, orig_node); |
7ae8b285 ML |
272 | if (!neigh_node) |
273 | goto out; | |
274 | ||
89652331 SW |
275 | if (!atomic_inc_not_zero(&hard_iface->refcount)) { |
276 | kfree(neigh_node); | |
277 | neigh_node = NULL; | |
278 | goto out; | |
279 | } | |
280 | ||
281 | neigh_node->orig_node = orig_neigh; | |
282 | neigh_node->if_incoming = hard_iface; | |
7ae8b285 | 283 | |
7ae8b285 | 284 | spin_lock_bh(&orig_node->neigh_list_lock); |
08bf0ed2 AQ |
285 | tmp_neigh_node = batadv_neigh_node_get(orig_node, hard_iface, |
286 | neigh_addr); | |
287 | if (!tmp_neigh_node) { | |
288 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); | |
289 | } else { | |
290 | kfree(neigh_node); | |
291 | batadv_hardif_free_ref(hard_iface); | |
292 | neigh_node = tmp_neigh_node; | |
293 | } | |
7ae8b285 ML |
294 | spin_unlock_bh(&orig_node->neigh_list_lock); |
295 | ||
08bf0ed2 AQ |
296 | if (!tmp_neigh_node) |
297 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
298 | "Creating new neighbor %pM for orig_node %pM on interface %s\n", | |
299 | neigh_addr, orig_node->orig, | |
300 | hard_iface->net_dev->name); | |
301 | ||
7ae8b285 ML |
302 | out: |
303 | return neigh_node; | |
304 | } | |
305 | ||
56303d34 | 306 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 307 | { |
96412690 | 308 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 309 | unsigned char *ogm_buff; |
d7d32ec0 | 310 | uint32_t random_seqno; |
5346c35e | 311 | int res = -ENOMEM; |
d7d32ec0 ML |
312 | |
313 | /* randomize initial seqno to avoid collision */ | |
314 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 315 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 316 | |
14511519 ML |
317 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
318 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
319 | if (!ogm_buff) | |
77af7575 ML |
320 | goto out; |
321 | ||
14511519 ML |
322 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
323 | ||
324 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
325 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
326 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
327 | batadv_ogm_packet->ttl = 2; | |
96412690 | 328 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 329 | batadv_ogm_packet->reserved = 0; |
96412690 | 330 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 ML |
331 | |
332 | res = 0; | |
333 | ||
334 | out: | |
335 | return res; | |
d0b9fd89 ML |
336 | } |
337 | ||
56303d34 | 338 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 339 | { |
14511519 ML |
340 | kfree(hard_iface->bat_iv.ogm_buff); |
341 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
342 | } |
343 | ||
56303d34 | 344 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 345 | { |
96412690 | 346 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 347 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 348 | |
14511519 | 349 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
350 | ether_addr_copy(batadv_ogm_packet->orig, |
351 | hard_iface->net_dev->dev_addr); | |
352 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
353 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
354 | } |
355 | ||
56303d34 SE |
356 | static void |
357 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 358 | { |
96412690 | 359 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 360 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 361 | |
14511519 | 362 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
96412690 | 363 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
a40d9b07 | 364 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
365 | } |
366 | ||
b9dacc52 | 367 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 368 | static unsigned long |
56303d34 | 369 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 370 | { |
42d0b044 SE |
371 | unsigned int msecs; |
372 | ||
373 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 374 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
375 | |
376 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
377 | } |
378 | ||
379 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 380 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 381 | { |
e76e4320 | 382 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
383 | } |
384 | ||
385 | /* apply hop penalty for a normal link */ | |
56303d34 SE |
386 | static uint8_t batadv_hop_penalty(uint8_t tq, |
387 | const struct batadv_priv *bat_priv) | |
b9dacc52 ML |
388 | { |
389 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
390 | int new_tq; |
391 | ||
392 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
393 | new_tq /= BATADV_TQ_MAX_VALUE; | |
394 | ||
395 | return new_tq; | |
b9dacc52 ML |
396 | } |
397 | ||
fc957275 | 398 | /* is there another aggregated packet here? */ |
fe8bc396 | 399 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
ef261577 | 400 | __be16 tvlv_len) |
fc957275 | 401 | { |
08c36d3e SE |
402 | int next_buff_pos = 0; |
403 | ||
7e071c79 | 404 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 405 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
406 | |
407 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 408 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
409 | } |
410 | ||
b9dacc52 | 411 | /* send a batman ogm to a given interface */ |
56303d34 SE |
412 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
413 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 414 | { |
56303d34 | 415 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
b9dacc52 ML |
416 | char *fwd_str; |
417 | uint8_t packet_num; | |
418 | int16_t buff_pos; | |
96412690 | 419 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 420 | struct sk_buff *skb; |
c67893d1 | 421 | uint8_t *packet_pos; |
b9dacc52 | 422 | |
e9a4f295 | 423 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
424 | return; |
425 | ||
426 | packet_num = 0; | |
427 | buff_pos = 0; | |
c67893d1 SE |
428 | packet_pos = forw_packet->skb->data; |
429 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
430 | |
431 | /* adjust all flags and log packets */ | |
fe8bc396 | 432 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 433 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 434 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
435 | * ordinary base packet |
436 | */ | |
8de47de5 SE |
437 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
438 | forw_packet->if_incoming == hard_iface) | |
96412690 | 439 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 440 | else |
96412690 | 441 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 442 | |
c67893d1 SE |
443 | if (packet_num > 0 || !forw_packet->own) |
444 | fwd_str = "Forwarding"; | |
445 | else | |
446 | fwd_str = "Sending own"; | |
447 | ||
39c75a51 | 448 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 449 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 450 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
451 | batadv_ogm_packet->orig, |
452 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 453 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
96412690 | 454 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? |
1eda58bf | 455 | "on" : "off"), |
e1bf0c14 | 456 | hard_iface->net_dev->name, |
1eda58bf | 457 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 458 | |
7e071c79 | 459 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 460 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 461 | packet_num++; |
c67893d1 SE |
462 | packet_pos = forw_packet->skb->data + buff_pos; |
463 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
464 | } |
465 | ||
466 | /* create clone because function is called more than once */ | |
467 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 468 | if (skb) { |
d69909d2 SE |
469 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
470 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 471 | skb->len + ETH_HLEN); |
3193e8fd | 472 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
f8214865 | 473 | } |
b9dacc52 ML |
474 | } |
475 | ||
476 | /* send a batman ogm packet */ | |
56303d34 | 477 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 478 | { |
b9dacc52 | 479 | struct net_device *soft_iface; |
56303d34 SE |
480 | struct batadv_priv *bat_priv; |
481 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
482 | |
483 | if (!forw_packet->if_incoming) { | |
86ceb360 | 484 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
485 | goto out; |
486 | } | |
487 | ||
488 | soft_iface = forw_packet->if_incoming->soft_iface; | |
489 | bat_priv = netdev_priv(soft_iface); | |
490 | ||
ef0a937f | 491 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
492 | goto out; |
493 | ||
ef0a937f | 494 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
495 | goto out; |
496 | ||
ef0a937f | 497 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 498 | goto out; |
b9dacc52 | 499 | |
ef0a937f SW |
500 | primary_if = batadv_primary_if_get_selected(bat_priv); |
501 | if (!primary_if) | |
502 | goto out; | |
b9dacc52 | 503 | |
ef0a937f SW |
504 | /* only for one specific outgoing interface */ |
505 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
506 | |
507 | out: | |
508 | if (primary_if) | |
e5d89254 | 509 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
510 | } |
511 | ||
ef0a937f SW |
512 | /** |
513 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
514 | * existing forward packet | |
515 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
516 | * @bat_priv: the bat priv with all the soft interface information | |
517 | * @packet_len: (total) length of the OGM | |
518 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 519 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
520 | * @if_incoming: interface where the packet was received |
521 | * @if_outgoing: interface for which the retransmission should be considered | |
522 | * @forw_packet: the forwarded packet which should be checked | |
523 | * | |
524 | * Returns true if new_packet can be aggregated with forw_packet | |
525 | */ | |
fe8bc396 | 526 | static bool |
96412690 | 527 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 528 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
529 | int packet_len, unsigned long send_time, |
530 | bool directlink, | |
56303d34 | 531 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 532 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 533 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 534 | { |
96412690 | 535 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 536 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 537 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 538 | bool res = false; |
42d0b044 | 539 | unsigned long aggregation_end_time; |
b9dacc52 | 540 | |
96412690 | 541 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
542 | aggregation_end_time = send_time; |
543 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 544 | |
9cfc7bd6 | 545 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
546 | * if: |
547 | * | |
548 | * - the send time is within our MAX_AGGREGATION_MS time | |
549 | * - the resulting packet wont be bigger than | |
550 | * MAX_AGGREGATION_BYTES | |
551 | */ | |
b9dacc52 | 552 | if (time_before(send_time, forw_packet->send_time) && |
42d0b044 SE |
553 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
554 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { | |
9cfc7bd6 | 555 | /* check aggregation compatibility |
b9dacc52 ML |
556 | * -> direct link packets are broadcasted on |
557 | * their interface only | |
558 | * -> aggregate packet if the current packet is | |
559 | * a "global" packet as well as the base | |
560 | * packet | |
561 | */ | |
e5d89254 | 562 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 ML |
563 | if (!primary_if) |
564 | goto out; | |
565 | ||
ef0a937f SW |
566 | /* packet is not leaving on the same interface. */ |
567 | if (forw_packet->if_outgoing != if_outgoing) | |
568 | goto out; | |
569 | ||
b9dacc52 | 570 | /* packets without direct link flag and high TTL |
9cfc7bd6 SE |
571 | * are flooded through the net |
572 | */ | |
b9dacc52 | 573 | if ((!directlink) && |
96412690 | 574 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
a40d9b07 | 575 | (batadv_ogm_packet->ttl != 1) && |
b9dacc52 ML |
576 | |
577 | /* own packets originating non-primary | |
9cfc7bd6 SE |
578 | * interfaces leave only that interface |
579 | */ | |
b9dacc52 ML |
580 | ((!forw_packet->own) || |
581 | (forw_packet->if_incoming == primary_if))) { | |
582 | res = true; | |
583 | goto out; | |
584 | } | |
585 | ||
586 | /* if the incoming packet is sent via this one | |
9cfc7bd6 SE |
587 | * interface only - we still can aggregate |
588 | */ | |
b9dacc52 | 589 | if ((directlink) && |
a40d9b07 | 590 | (new_bat_ogm_packet->ttl == 1) && |
b9dacc52 ML |
591 | (forw_packet->if_incoming == if_incoming) && |
592 | ||
593 | /* packets from direct neighbors or | |
594 | * own secondary interface packets | |
9cfc7bd6 SE |
595 | * (= secondary interface packets in general) |
596 | */ | |
96412690 | 597 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
b9dacc52 ML |
598 | (forw_packet->own && |
599 | forw_packet->if_incoming != primary_if))) { | |
600 | res = true; | |
601 | goto out; | |
602 | } | |
603 | } | |
604 | ||
605 | out: | |
606 | if (primary_if) | |
e5d89254 | 607 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
608 | return res; |
609 | } | |
610 | ||
1b371d13 SW |
611 | /** |
612 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
613 | * packet to it. |
614 | * @packet_buff: pointer to the OGM | |
615 | * @packet_len: (total) length of the OGM | |
616 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
617 | * @direct_link: whether this OGM has direct link status | |
618 | * @if_incoming: interface where the packet was received | |
619 | * @if_outgoing: interface for which the retransmission should be considered | |
620 | * @own_packet: true if it is a self-generated ogm | |
621 | */ | |
fe8bc396 SE |
622 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
623 | int packet_len, unsigned long send_time, | |
624 | bool direct_link, | |
56303d34 | 625 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 626 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 627 | int own_packet) |
b9dacc52 | 628 | { |
56303d34 SE |
629 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
630 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 631 | unsigned char *skb_buff; |
42d0b044 | 632 | unsigned int skb_size; |
b9dacc52 ML |
633 | |
634 | if (!atomic_inc_not_zero(&if_incoming->refcount)) | |
635 | return; | |
636 | ||
ef0a937f SW |
637 | if (!atomic_inc_not_zero(&if_outgoing->refcount)) |
638 | goto out_free_incoming; | |
639 | ||
b9dacc52 ML |
640 | /* own packet should always be scheduled */ |
641 | if (!own_packet) { | |
3e34819e | 642 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 643 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 644 | "batman packet queue full\n"); |
b9dacc52 ML |
645 | goto out; |
646 | } | |
647 | } | |
648 | ||
649 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
650 | if (!forw_packet_aggr) { | |
651 | if (!own_packet) | |
652 | atomic_inc(&bat_priv->batman_queue_left); | |
653 | goto out; | |
654 | } | |
655 | ||
656 | if ((atomic_read(&bat_priv->aggregated_ogms)) && | |
42d0b044 | 657 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
5b246574 | 658 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 659 | else |
5b246574 SE |
660 | skb_size = packet_len; |
661 | ||
41ab6c48 | 662 | skb_size += ETH_HLEN; |
b9dacc52 | 663 | |
41ab6c48 | 664 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
b9dacc52 ML |
665 | if (!forw_packet_aggr->skb) { |
666 | if (!own_packet) | |
667 | atomic_inc(&bat_priv->batman_queue_left); | |
668 | kfree(forw_packet_aggr); | |
669 | goto out; | |
670 | } | |
c54f38c9 | 671 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 672 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 673 | |
b9dacc52 ML |
674 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
675 | forw_packet_aggr->packet_len = packet_len; | |
676 | memcpy(skb_buff, packet_buff, packet_len); | |
677 | ||
678 | forw_packet_aggr->own = own_packet; | |
679 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 680 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 681 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 682 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
683 | forw_packet_aggr->send_time = send_time; |
684 | ||
685 | /* save packet direct link flag status */ | |
686 | if (direct_link) | |
687 | forw_packet_aggr->direct_link_flags |= 1; | |
688 | ||
689 | /* add new packet to packet list */ | |
690 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
691 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
692 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
693 | ||
694 | /* start timer for this packet */ | |
695 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 696 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 697 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
698 | &forw_packet_aggr->delayed_work, |
699 | send_time - jiffies); | |
700 | ||
701 | return; | |
702 | out: | |
ef0a937f SW |
703 | batadv_hardif_free_ref(if_outgoing); |
704 | out_free_incoming: | |
e5d89254 | 705 | batadv_hardif_free_ref(if_incoming); |
b9dacc52 ML |
706 | } |
707 | ||
708 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 709 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
710 | const unsigned char *packet_buff, |
711 | int packet_len, bool direct_link) | |
b9dacc52 ML |
712 | { |
713 | unsigned char *skb_buff; | |
8de47de5 | 714 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
715 | |
716 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
717 | memcpy(skb_buff, packet_buff, packet_len); | |
718 | forw_packet_aggr->packet_len += packet_len; | |
719 | forw_packet_aggr->num_packets++; | |
720 | ||
721 | /* save packet direct link flag status */ | |
8de47de5 SE |
722 | if (direct_link) { |
723 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
724 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
725 | } | |
b9dacc52 ML |
726 | } |
727 | ||
ef0a937f SW |
728 | /** |
729 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
730 | * @bat_priv: the bat priv with all the soft interface information | |
731 | * @packet_buff: pointer to the OGM | |
732 | * @packet_len: (total) length of the OGM | |
733 | * @if_incoming: interface where the packet was received | |
734 | * @if_outgoing: interface for which the retransmission should be considered | |
735 | * @own_packet: true if it is a self-generated ogm | |
736 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
737 | */ | |
56303d34 | 738 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
739 | unsigned char *packet_buff, |
740 | int packet_len, | |
56303d34 | 741 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 742 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 743 | int own_packet, unsigned long send_time) |
b9dacc52 | 744 | { |
9cfc7bd6 | 745 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
746 | * _pos -> pointer to the position in the queue |
747 | */ | |
56303d34 SE |
748 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
749 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 750 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 751 | bool direct_link; |
42d0b044 | 752 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 753 | |
96412690 SE |
754 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
755 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; | |
42d0b044 | 756 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
757 | |
758 | /* find position for the packet in the forward queue */ | |
759 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
760 | /* own packets are not to be aggregated */ | |
761 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { | |
b67bfe0d | 762 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 763 | &bat_priv->forw_bat_list, list) { |
96412690 | 764 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
765 | bat_priv, packet_len, |
766 | send_time, direct_link, | |
767 | if_incoming, | |
ef0a937f | 768 | if_outgoing, |
fe8bc396 | 769 | forw_packet_pos)) { |
b9dacc52 ML |
770 | forw_packet_aggr = forw_packet_pos; |
771 | break; | |
772 | } | |
773 | } | |
774 | } | |
775 | ||
776 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
777 | * suitable aggregation packet found |
778 | */ | |
b9dacc52 ML |
779 | if (!forw_packet_aggr) { |
780 | /* the following section can run without the lock */ | |
781 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
782 | ||
9cfc7bd6 | 783 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
784 | * we hold it back for a while, so that it might be aggregated |
785 | * later on | |
786 | */ | |
42d0b044 SE |
787 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
788 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 789 | |
fe8bc396 SE |
790 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
791 | send_time, direct_link, | |
ef0a937f SW |
792 | if_incoming, if_outgoing, |
793 | own_packet); | |
b9dacc52 | 794 | } else { |
fe8bc396 SE |
795 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
796 | packet_len, direct_link); | |
b9dacc52 ML |
797 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
798 | } | |
799 | } | |
800 | ||
56303d34 | 801 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 802 | const struct ethhdr *ethhdr, |
96412690 | 803 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
804 | bool is_single_hop_neigh, |
805 | bool is_from_best_next_hop, | |
ef0a937f SW |
806 | struct batadv_hard_iface *if_incoming, |
807 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 808 | { |
56303d34 | 809 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
ef261577 | 810 | uint16_t tvlv_len; |
b9dacc52 | 811 | |
a40d9b07 | 812 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 813 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
814 | return; |
815 | } | |
816 | ||
13b2541b ML |
817 | if (!is_from_best_next_hop) { |
818 | /* Mark the forwarded packet when it is not coming from our | |
819 | * best next hop. We still need to forward the packet for our | |
820 | * neighbor link quality detection to work in case the packet | |
821 | * originated from a single hop neighbor. Otherwise we can | |
822 | * simply drop the ogm. | |
823 | */ | |
824 | if (is_single_hop_neigh) | |
96412690 | 825 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
826 | else |
827 | return; | |
828 | } | |
b9dacc52 | 829 | |
ef261577 | 830 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 831 | |
a40d9b07 | 832 | batadv_ogm_packet->ttl--; |
8fdd0153 | 833 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 834 | |
b9dacc52 | 835 | /* apply hop penalty */ |
96412690 | 836 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 837 | bat_priv); |
b9dacc52 | 838 | |
39c75a51 | 839 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 840 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 841 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 842 | |
b9dacc52 | 843 | /* switch of primaries first hop flag when forwarding */ |
96412690 | 844 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
75cd33f8 | 845 | if (is_single_hop_neigh) |
96412690 | 846 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 847 | else |
96412690 | 848 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 849 | |
96412690 | 850 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 851 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
852 | if_incoming, if_outgoing, 0, |
853 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
854 | } |
855 | ||
d9896617 AQ |
856 | /** |
857 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
858 | * the given interface | |
859 | * @hard_iface: the interface for which the windows have to be shifted | |
860 | */ | |
861 | static void | |
862 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
863 | { | |
864 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
865 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
866 | struct hlist_head *head; | |
867 | struct batadv_orig_node *orig_node; | |
868 | unsigned long *word; | |
869 | uint32_t i; | |
870 | size_t word_index; | |
871 | uint8_t *w; | |
bbad0a5e | 872 | int if_num; |
d9896617 AQ |
873 | |
874 | for (i = 0; i < hash->size; i++) { | |
875 | head = &hash->table[i]; | |
876 | ||
877 | rcu_read_lock(); | |
878 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 879 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 880 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 881 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
882 | |
883 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
884 | if_num = hard_iface->if_num; |
885 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 886 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 887 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
888 | } |
889 | rcu_read_unlock(); | |
890 | } | |
891 | } | |
892 | ||
56303d34 | 893 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 894 | { |
56303d34 | 895 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 896 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 897 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 898 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 899 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
bbb1f90e | 900 | uint32_t seqno; |
ef261577 | 901 | uint16_t tvlv_len = 0; |
ef0a937f | 902 | unsigned long send_time; |
b9dacc52 | 903 | |
e5d89254 | 904 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 905 | |
e1bf0c14 ML |
906 | if (hard_iface == primary_if) { |
907 | /* tt changes have to be committed before the tvlv data is | |
908 | * appended as it may alter the tt tvlv container | |
909 | */ | |
910 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
911 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
912 | ogm_buff_len, | |
913 | BATADV_OGM_HLEN); | |
e1bf0c14 | 914 | } |
be9aa4c1 | 915 | |
14511519 | 916 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 917 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
918 | |
919 | /* change sequence number to network order */ | |
14511519 | 920 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 921 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 922 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 923 | |
d9896617 | 924 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 925 | |
ef0a937f SW |
926 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
927 | ||
928 | if (hard_iface != primary_if) { | |
929 | /* OGMs from secondary interfaces are only scheduled on their | |
930 | * respective interfaces. | |
931 | */ | |
932 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
933 | hard_iface, hard_iface, 1, send_time); | |
934 | goto out; | |
935 | } | |
936 | ||
937 | /* OGMs from primary interfaces are scheduled on all | |
938 | * interfaces. | |
939 | */ | |
940 | rcu_read_lock(); | |
941 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
942 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
943 | continue; | |
944 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, | |
945 | *ogm_buff_len, hard_iface, | |
946 | tmp_hard_iface, 1, send_time); | |
947 | } | |
948 | rcu_read_unlock(); | |
949 | ||
950 | out: | |
b9dacc52 | 951 | if (primary_if) |
e5d89254 | 952 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
953 | } |
954 | ||
89652331 SW |
955 | /** |
956 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
957 | * originator | |
958 | * @bat_priv: the bat priv with all the soft interface information | |
959 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 960 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
961 | * @ethhdr: Ethernet header of the OGM |
962 | * @batadv_ogm_packet: the ogm packet | |
963 | * @if_incoming: interface where the packet was received | |
964 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
965 | * @dup_status: the duplicate status of this ogm packet. |
966 | */ | |
fe8bc396 | 967 | static void |
56303d34 SE |
968 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
969 | struct batadv_orig_node *orig_node, | |
7351a482 | 970 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 971 | const struct ethhdr *ethhdr, |
96412690 | 972 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 973 | struct batadv_hard_iface *if_incoming, |
89652331 | 974 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 975 | enum batadv_dup_status dup_status) |
fc957275 | 976 | { |
89652331 SW |
977 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
978 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
56303d34 SE |
979 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
980 | struct batadv_neigh_node *router = NULL; | |
981 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 982 | int if_num; |
bbb1f90e | 983 | uint8_t sum_orig, sum_neigh; |
1eda58bf | 984 | uint8_t *neigh_addr; |
bbb1f90e | 985 | uint8_t tq_avg; |
fc957275 | 986 | |
39c75a51 | 987 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 988 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
989 | |
990 | rcu_read_lock(); | |
b67bfe0d | 991 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 992 | &orig_node->neigh_list, list) { |
1eda58bf SE |
993 | neigh_addr = tmp_neigh_node->addr; |
994 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
995 | tmp_neigh_node->if_incoming == if_incoming && | |
996 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { | |
38dc40ef | 997 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
7d211efc | 998 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
999 | neigh_node = tmp_neigh_node; |
1000 | continue; | |
1001 | } | |
1002 | ||
7c24bbbe | 1003 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1004 | continue; |
1005 | ||
89652331 SW |
1006 | /* only update the entry for this outgoing interface */ |
1007 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1008 | if_outgoing); | |
1009 | if (!neigh_ifinfo) | |
1010 | continue; | |
1011 | ||
1012 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1013 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1014 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1015 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1016 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1017 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1018 | ||
1019 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1020 | neigh_ifinfo = NULL; | |
fc957275 ML |
1021 | } |
1022 | ||
1023 | if (!neigh_node) { | |
56303d34 | 1024 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1025 | |
bbad0a5e | 1026 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1027 | if (!orig_tmp) |
1028 | goto unlock; | |
1029 | ||
fe8bc396 SE |
1030 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1031 | ethhdr->h_source, | |
863dd7a8 | 1032 | orig_node, orig_tmp); |
fc957275 | 1033 | |
7d211efc | 1034 | batadv_orig_node_free_ref(orig_tmp); |
fc957275 ML |
1035 | if (!neigh_node) |
1036 | goto unlock; | |
1037 | } else | |
39c75a51 | 1038 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1039 | "Updating existing last-hop neighbor of originator\n"); |
fc957275 ML |
1040 | |
1041 | rcu_read_unlock(); | |
89652331 SW |
1042 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1043 | if (!neigh_ifinfo) | |
1044 | goto out; | |
fc957275 | 1045 | |
d7b2a97e | 1046 | neigh_node->last_seen = jiffies; |
fc957275 | 1047 | |
89652331 SW |
1048 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1049 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1050 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1051 | batadv_ogm_packet->tq); |
89652331 SW |
1052 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1053 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1054 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1055 | |
7c24bbbe | 1056 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1057 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1058 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1059 | } |
1060 | ||
fc957275 | 1061 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1062 | * to change |
1063 | */ | |
7351a482 | 1064 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1065 | if (router == neigh_node) |
e1bf0c14 | 1066 | goto out; |
fc957275 | 1067 | |
89652331 SW |
1068 | if (router) { |
1069 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1070 | if (!router_ifinfo) | |
1071 | goto out; | |
1072 | ||
1073 | /* if this neighbor does not offer a better TQ we won't | |
1074 | * consider it | |
1075 | */ | |
1076 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1077 | goto out; | |
1078 | } | |
fc957275 ML |
1079 | |
1080 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1081 | * won't consider it either |
1082 | */ | |
89652331 SW |
1083 | if (router_ifinfo && |
1084 | (neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg)) { | |
fc957275 | 1085 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1086 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1087 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1088 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1089 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1090 | |
1091 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1092 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1093 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1094 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1095 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1096 | |
bbb1f90e | 1097 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1098 | goto out; |
fc957275 ML |
1099 | } |
1100 | ||
7351a482 | 1101 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1102 | goto out; |
1103 | ||
1104 | unlock: | |
1105 | rcu_read_unlock(); | |
1106 | out: | |
1107 | if (neigh_node) | |
7d211efc | 1108 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 | 1109 | if (router) |
7d211efc | 1110 | batadv_neigh_node_free_ref(router); |
89652331 SW |
1111 | if (neigh_ifinfo) |
1112 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1113 | if (router_ifinfo) | |
1114 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 ML |
1115 | } |
1116 | ||
89652331 SW |
1117 | /** |
1118 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1119 | * @orig_node: the orig node who originally emitted the ogm packet | |
1120 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1121 | * @batadv_ogm_packet: the ogm packet | |
1122 | * @if_incoming: interface where the packet was received | |
1123 | * @if_outgoing: interface for which the retransmission should be considered | |
1124 | * | |
1125 | * Returns 1 if the link can be considered bidirectional, 0 otherwise | |
1126 | */ | |
56303d34 SE |
1127 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1128 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 1129 | struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1130 | struct batadv_hard_iface *if_incoming, |
1131 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1132 | { |
56303d34 SE |
1133 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1134 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1135 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
fc957275 | 1136 | uint8_t total_count; |
42d0b044 SE |
1137 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
1138 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; | |
bbad0a5e | 1139 | int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; |
42d0b044 | 1140 | unsigned int combined_tq; |
c0398768 | 1141 | int tq_iface_penalty; |
fc957275 ML |
1142 | |
1143 | /* find corresponding one hop neighbor */ | |
1144 | rcu_read_lock(); | |
b67bfe0d | 1145 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1146 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1147 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1148 | orig_neigh_node->orig)) | |
fc957275 ML |
1149 | continue; |
1150 | ||
1151 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1152 | continue; | |
1153 | ||
1154 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
1155 | continue; | |
1156 | ||
1157 | neigh_node = tmp_neigh_node; | |
1158 | break; | |
1159 | } | |
1160 | rcu_read_unlock(); | |
1161 | ||
1162 | if (!neigh_node) | |
fe8bc396 SE |
1163 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1164 | orig_neigh_node->orig, | |
1165 | orig_neigh_node, | |
863dd7a8 | 1166 | orig_neigh_node); |
fc957275 ML |
1167 | |
1168 | if (!neigh_node) | |
1169 | goto out; | |
1170 | ||
d7b2a97e | 1171 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1172 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1173 | neigh_node->last_seen = jiffies; |
fc957275 | 1174 | |
d7b2a97e | 1175 | orig_node->last_seen = jiffies; |
fc957275 ML |
1176 | |
1177 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1178 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1179 | if_num = if_incoming->if_num; | |
1180 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1181 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1182 | if (neigh_ifinfo) { | |
1183 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
1184 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1185 | } else { | |
1186 | neigh_rq_count = 0; | |
1187 | } | |
bbad0a5e | 1188 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1189 | |
1190 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1191 | if (orig_eq_count > neigh_rq_count) |
1192 | total_count = neigh_rq_count; | |
1193 | else | |
1194 | total_count = orig_eq_count; | |
fc957275 | 1195 | |
9cfc7bd6 SE |
1196 | /* if we have too few packets (too less data) we set tq_own to zero |
1197 | * if we receive too few packets it is not considered bidirectional | |
1198 | */ | |
42d0b044 SE |
1199 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1200 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1201 | tq_own = 0; |
1202 | else | |
1203 | /* neigh_node->real_packet_count is never zero as we | |
1204 | * only purge old information when getting new | |
9cfc7bd6 SE |
1205 | * information |
1206 | */ | |
42d0b044 | 1207 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1208 | |
21a1236b | 1209 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1210 | * affect the nearly-symmetric links only a little, but |
1211 | * punishes asymmetric links more. This will give a value | |
1212 | * between 0 and TQ_MAX_VALUE | |
1213 | */ | |
42d0b044 SE |
1214 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1215 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1216 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1217 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1218 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1219 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1220 | inv_asym_penalty /= neigh_rq_max_cube; | |
1221 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1222 | ||
c0398768 SW |
1223 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1224 | * interfaces and other half duplex devices suffer from throughput | |
1225 | * drops as they can't send and receive at the same time. | |
1226 | */ | |
1227 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1228 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1229 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1230 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1231 | bat_priv); | |
1232 | ||
1233 | combined_tq = batadv_ogm_packet->tq * | |
1234 | tq_own * | |
1235 | tq_asym_penalty * | |
1236 | tq_iface_penalty; | |
1237 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1238 | BATADV_TQ_MAX_VALUE * | |
1239 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1240 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1241 | |
39c75a51 | 1242 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1243 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, iface_penalty: %3i, total tq: %3i, if_incoming = %s, if_outgoing = %s\n", |
1eda58bf | 1244 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1245 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1246 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1247 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1248 | |
1249 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1250 | * consider it bidirectional |
1251 | */ | |
96412690 | 1252 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
fc957275 ML |
1253 | ret = 1; |
1254 | ||
1255 | out: | |
1256 | if (neigh_node) | |
7d211efc | 1257 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
1258 | return ret; |
1259 | } | |
1260 | ||
7c24bbbe SW |
1261 | /** |
1262 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1263 | * adjust the sequence number and find out whether it is a duplicate | |
1264 | * @ethhdr: ethernet header of the packet | |
1265 | * @batadv_ogm_packet: OGM packet to be considered | |
1266 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1267 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe SW |
1268 | * |
1269 | * Returns duplicate status as enum batadv_dup_status | |
fc957275 | 1270 | */ |
7c24bbbe | 1271 | static enum batadv_dup_status |
fe8bc396 | 1272 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1273 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1274 | const struct batadv_hard_iface *if_incoming, |
1275 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1276 | { |
56303d34 SE |
1277 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1278 | struct batadv_orig_node *orig_node; | |
7351a482 | 1279 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1280 | struct batadv_neigh_node *neigh_node; |
1281 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
7c24bbbe | 1282 | int is_dup; |
fc957275 ML |
1283 | int32_t seq_diff; |
1284 | int need_update = 0; | |
7c24bbbe SW |
1285 | int set_mark; |
1286 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
96412690 | 1287 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
1eda58bf | 1288 | uint8_t *neigh_addr; |
bbb1f90e | 1289 | uint8_t packet_count; |
0538f759 | 1290 | unsigned long *bitmap; |
fc957275 | 1291 | |
bbad0a5e | 1292 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1293 | if (!orig_node) |
7c24bbbe | 1294 | return BATADV_NO_DUP; |
fc957275 | 1295 | |
7351a482 SW |
1296 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1297 | if (WARN_ON(!orig_ifinfo)) { | |
1298 | batadv_orig_node_free_ref(orig_node); | |
1299 | return 0; | |
1300 | } | |
1301 | ||
bbad0a5e | 1302 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1303 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1304 | |
1305 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1306 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1307 | batadv_window_protected(bat_priv, seq_diff, |
7351a482 | 1308 | &orig_ifinfo->batman_seqno_reset)) { |
7c24bbbe | 1309 | ret = BATADV_PROTECTED; |
fc957275 | 1310 | goto out; |
7c24bbbe | 1311 | } |
fc957275 ML |
1312 | |
1313 | rcu_read_lock(); | |
89652331 SW |
1314 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1315 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1316 | if_outgoing); | |
1317 | if (!neigh_ifinfo) | |
1318 | continue; | |
1319 | ||
1320 | neigh_addr = neigh_node->addr; | |
1321 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1322 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1323 | seqno); |
1324 | ||
1eda58bf | 1325 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1326 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1327 | set_mark = 1; |
7c24bbbe SW |
1328 | if (is_dup) |
1329 | ret = BATADV_NEIGH_DUP; | |
1330 | } else { | |
fc957275 | 1331 | set_mark = 0; |
7c24bbbe SW |
1332 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1333 | ret = BATADV_ORIG_DUP; | |
1334 | } | |
fc957275 ML |
1335 | |
1336 | /* if the window moved, set the update flag. */ | |
89652331 | 1337 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1338 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1339 | seq_diff, set_mark); |
fc957275 | 1340 | |
89652331 | 1341 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1342 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 SW |
1343 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
1344 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
fc957275 ML |
1345 | } |
1346 | rcu_read_unlock(); | |
1347 | ||
1348 | if (need_update) { | |
39c75a51 | 1349 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1350 | "%s updating last_seqno: old %u, new %u\n", |
1351 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1352 | orig_ifinfo->last_real_seqno, seqno); | |
1353 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1354 | } |
1355 | ||
fc957275 | 1356 | out: |
bbad0a5e | 1357 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7d211efc | 1358 | batadv_orig_node_free_ref(orig_node); |
7351a482 SW |
1359 | if (orig_ifinfo) |
1360 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
fc957275 ML |
1361 | return ret; |
1362 | } | |
1363 | ||
7351a482 SW |
1364 | /** |
1365 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1366 | * @skb: the skb containing the OGM | |
95298a91 | 1367 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1368 | * @orig_node: the (cached) orig node for the originator of this OGM |
1369 | * @if_incoming: the interface where this packet was received | |
1370 | * @if_outgoing: the interface for which the packet should be considered | |
1371 | */ | |
1372 | static void | |
1373 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1374 | struct batadv_orig_node *orig_node, | |
1375 | struct batadv_hard_iface *if_incoming, | |
1376 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1377 | { |
56303d34 | 1378 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
56303d34 | 1379 | struct batadv_neigh_node *router = NULL, *router_router = NULL; |
7351a482 SW |
1380 | struct batadv_orig_node *orig_neigh_node; |
1381 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1382 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1383 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1384 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1385 | enum batadv_dup_status dup_status; |
7351a482 SW |
1386 | bool is_from_best_next_hop = false; |
1387 | bool is_single_hop_neigh = false; | |
1388 | bool sameseq, similar_ttl; | |
1389 | struct sk_buff *skb_priv; | |
1390 | struct ethhdr *ethhdr; | |
1eda58bf | 1391 | uint8_t *prev_sender; |
7351a482 | 1392 | int is_bidirect; |
fc957275 | 1393 | |
7351a482 SW |
1394 | /* create a private copy of the skb, as some functions change tq value |
1395 | * and/or flags. | |
fc957275 | 1396 | */ |
7351a482 SW |
1397 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1398 | if (!skb_priv) | |
fc957275 ML |
1399 | return; |
1400 | ||
7351a482 SW |
1401 | ethhdr = eth_hdr(skb_priv); |
1402 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1403 | |
7351a482 SW |
1404 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1405 | if_incoming, if_outgoing); | |
1406 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1407 | is_single_hop_neigh = true; |
fc957275 | 1408 | |
7c24bbbe | 1409 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1410 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1411 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1412 | ethhdr->h_source); | |
fc957275 ML |
1413 | goto out; |
1414 | } | |
1415 | ||
7351a482 | 1416 | if (ogm_packet->tq == 0) { |
39c75a51 | 1417 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1418 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1419 | goto out; |
1420 | } | |
1421 | ||
7351a482 | 1422 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1423 | if (router) { |
7351a482 SW |
1424 | router_router = batadv_orig_router_get(router->orig_node, |
1425 | if_outgoing); | |
1426 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1427 | } |
fc957275 | 1428 | |
7351a482 | 1429 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1430 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1431 | is_from_best_next_hop = true; |
1432 | ||
7351a482 | 1433 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1434 | /* avoid temporary routing loops */ |
1435 | if (router && router_router && | |
1eda58bf | 1436 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1437 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1438 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1439 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1440 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1441 | ethhdr->h_source); | |
fc957275 ML |
1442 | goto out; |
1443 | } | |
1444 | ||
7351a482 SW |
1445 | if (if_outgoing == BATADV_IF_DEFAULT) |
1446 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1447 | |
fc957275 | 1448 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1449 | * originator mac |
1450 | */ | |
c67893d1 SE |
1451 | if (is_single_hop_neigh) |
1452 | orig_neigh_node = orig_node; | |
1453 | else | |
bbad0a5e AQ |
1454 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1455 | ethhdr->h_source); | |
c67893d1 | 1456 | |
fc957275 ML |
1457 | if (!orig_neigh_node) |
1458 | goto out; | |
1459 | ||
d56b1705 MH |
1460 | /* Update nc_nodes of the originator */ |
1461 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1462 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1463 | |
7351a482 SW |
1464 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1465 | if_outgoing); | |
fc957275 ML |
1466 | |
1467 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1468 | * don't route towards it |
1469 | */ | |
fc957275 | 1470 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1471 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1472 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1473 | goto out_neigh; |
1474 | } | |
1475 | ||
fe8bc396 | 1476 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1477 | ogm_packet, if_incoming, |
1478 | if_outgoing); | |
fc957275 | 1479 | |
fc957275 | 1480 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1481 | * seqno and similar ttl as the non-duplicate |
1482 | */ | |
7351a482 SW |
1483 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1484 | if (!orig_ifinfo) | |
1485 | goto out_neigh; | |
1486 | ||
1487 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1488 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1489 | ||
7c24bbbe | 1490 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1491 | (sameseq && similar_ttl))) { |
1492 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1493 | orig_ifinfo, ethhdr, | |
1494 | ogm_packet, if_incoming, | |
1495 | if_outgoing, dup_status); | |
1496 | } | |
1497 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
fc957275 | 1498 | |
ef0a937f SW |
1499 | /* only forward for specific interface, not for the default one. */ |
1500 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1501 | goto out_neigh; | |
1502 | ||
fc957275 ML |
1503 | /* is single hop (direct) neighbor */ |
1504 | if (is_single_hop_neigh) { | |
7351a482 SW |
1505 | /* OGMs from secondary interfaces should only scheduled once |
1506 | * per interface where it has been received, not multiple times | |
1507 | */ | |
1508 | if ((ogm_packet->ttl <= 2) && | |
1509 | (if_incoming != if_outgoing)) { | |
1510 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1511 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1512 | goto out_neigh; | |
1513 | } | |
fc957275 | 1514 | /* mark direct link on incoming interface */ |
7351a482 | 1515 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1516 | is_single_hop_neigh, |
ef0a937f SW |
1517 | is_from_best_next_hop, if_incoming, |
1518 | if_outgoing); | |
fc957275 | 1519 | |
39c75a51 | 1520 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1521 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1522 | goto out_neigh; |
1523 | } | |
1524 | ||
1525 | /* multihop originator */ | |
fe8bc396 | 1526 | if (!is_bidirect) { |
39c75a51 | 1527 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1528 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1529 | goto out_neigh; |
1530 | } | |
1531 | ||
7c24bbbe | 1532 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1533 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1534 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1535 | goto out_neigh; |
1536 | } | |
1537 | ||
39c75a51 | 1538 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1539 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1540 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1541 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1542 | if_incoming, if_outgoing); |
fc957275 ML |
1543 | |
1544 | out_neigh: | |
1545 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
7d211efc | 1546 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 | 1547 | out: |
c1e517fb SW |
1548 | if (router_ifinfo) |
1549 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 | 1550 | if (router) |
7d211efc | 1551 | batadv_neigh_node_free_ref(router); |
fc957275 | 1552 | if (router_router) |
7d211efc | 1553 | batadv_neigh_node_free_ref(router_router); |
fc957275 | 1554 | if (orig_neigh_router) |
7d211efc | 1555 | batadv_neigh_node_free_ref(orig_neigh_router); |
fc957275 | 1556 | |
7351a482 SW |
1557 | kfree_skb(skb_priv); |
1558 | } | |
1559 | ||
1560 | /** | |
1561 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1562 | * @skb: the skb containing the OGM | |
1563 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1564 | * @if_incoming: the interface where this packet was receved | |
1565 | */ | |
1566 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1567 | struct batadv_hard_iface *if_incoming) | |
1568 | { | |
1569 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1570 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1571 | struct batadv_hard_iface *hard_iface; | |
1572 | struct batadv_ogm_packet *ogm_packet; | |
1573 | uint32_t if_incoming_seqno; | |
1574 | bool has_directlink_flag; | |
1575 | struct ethhdr *ethhdr; | |
1576 | bool is_my_oldorig = false; | |
1577 | bool is_my_addr = false; | |
1578 | bool is_my_orig = false; | |
1579 | ||
1580 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1581 | ethhdr = eth_hdr(skb); | |
1582 | ||
1583 | /* Silently drop when the batman packet is actually not a | |
1584 | * correct packet. | |
1585 | * | |
1586 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1587 | * minimum frame length of 64 byte) and the aggregation interprets | |
1588 | * it as an additional length. | |
1589 | * | |
1590 | * TODO: A more sane solution would be to have a bit in the | |
1591 | * batadv_ogm_packet to detect whether the packet is the last | |
1592 | * packet in an aggregation. Here we expect that the padding | |
1593 | * is always zero (or not 0x01) | |
1594 | */ | |
1595 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1596 | return; | |
1597 | ||
1598 | /* could be changed by schedule_own_packet() */ | |
1599 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1600 | ||
1601 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1602 | has_directlink_flag = true; | |
1603 | else | |
1604 | has_directlink_flag = false; | |
1605 | ||
1606 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1607 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, tq %d, TTL %d, V %d, IDF %d)\n", | |
1608 | ethhdr->h_source, if_incoming->net_dev->name, | |
1609 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1610 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1611 | ogm_packet->tq, ogm_packet->ttl, | |
1612 | ogm_packet->version, has_directlink_flag); | |
1613 | ||
1614 | rcu_read_lock(); | |
1615 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1616 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1617 | continue; | |
1618 | ||
1619 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1620 | continue; | |
1621 | ||
1622 | if (batadv_compare_eth(ethhdr->h_source, | |
1623 | hard_iface->net_dev->dev_addr)) | |
1624 | is_my_addr = true; | |
1625 | ||
1626 | if (batadv_compare_eth(ogm_packet->orig, | |
1627 | hard_iface->net_dev->dev_addr)) | |
1628 | is_my_orig = true; | |
1629 | ||
1630 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1631 | hard_iface->net_dev->dev_addr)) | |
1632 | is_my_oldorig = true; | |
1633 | } | |
1634 | rcu_read_unlock(); | |
1635 | ||
1636 | if (is_my_addr) { | |
1637 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1638 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1639 | ethhdr->h_source); | |
1640 | return; | |
1641 | } | |
1642 | ||
1643 | if (is_my_orig) { | |
1644 | unsigned long *word; | |
1645 | int offset; | |
1646 | int32_t bit_pos; | |
1647 | int16_t if_num; | |
1648 | uint8_t *weight; | |
1649 | ||
1650 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1651 | ethhdr->h_source); | |
1652 | if (!orig_neigh_node) | |
1653 | return; | |
1654 | ||
1655 | /* neighbor has to indicate direct link and it has to | |
1656 | * come via the corresponding interface | |
1657 | * save packet seqno for bidirectional check | |
1658 | */ | |
1659 | if (has_directlink_flag && | |
1660 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1661 | ogm_packet->orig)) { | |
1662 | if_num = if_incoming->if_num; | |
1663 | offset = if_num * BATADV_NUM_WORDS; | |
1664 | ||
1665 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1666 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1667 | bit_pos = if_incoming_seqno - 2; |
1668 | bit_pos -= ntohl(ogm_packet->seqno); | |
1669 | batadv_set_bit(word, bit_pos); | |
1670 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1671 | *weight = bitmap_weight(word, | |
1672 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1673 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1674 | } | |
1675 | ||
1676 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1677 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
1678 | batadv_orig_node_free_ref(orig_neigh_node); | |
1679 | return; | |
1680 | } | |
1681 | ||
1682 | if (is_my_oldorig) { | |
1683 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1684 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1685 | ethhdr->h_source); | |
1686 | return; | |
1687 | } | |
1688 | ||
1689 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1690 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1691 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1692 | ethhdr->h_source); | |
1693 | return; | |
1694 | } | |
1695 | ||
1696 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1697 | if (!orig_node) | |
1698 | return; | |
1699 | ||
1700 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1701 | if_incoming, BATADV_IF_DEFAULT); | |
1702 | ||
1703 | rcu_read_lock(); | |
1704 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1705 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1706 | continue; | |
1707 | ||
1708 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1709 | continue; | |
1710 | ||
1711 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1712 | if_incoming, hard_iface); | |
1713 | } | |
1714 | rcu_read_unlock(); | |
1715 | ||
7d211efc | 1716 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
1717 | } |
1718 | ||
fe8bc396 | 1719 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1720 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1721 | { |
56303d34 | 1722 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1723 | struct batadv_ogm_packet *ogm_packet; |
c67893d1 | 1724 | uint8_t *packet_pos; |
7351a482 | 1725 | int ogm_offset; |
ef261577 | 1726 | bool ret; |
c3e29312 | 1727 | |
7e071c79 | 1728 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1729 | if (!ret) |
1730 | return NET_RX_DROP; | |
fc957275 | 1731 | |
edbf12ba ML |
1732 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1733 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1734 | */ | |
fe8bc396 | 1735 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1736 | return NET_RX_DROP; |
1737 | ||
d69909d2 SE |
1738 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1739 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1740 | skb->len + ETH_HLEN); |
1741 | ||
7351a482 SW |
1742 | ogm_offset = 0; |
1743 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1744 | |
1745 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1746 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1747 | ogm_packet->tvlv_len)) { | |
1748 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1749 | |
7351a482 SW |
1750 | ogm_offset += BATADV_OGM_HLEN; |
1751 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1752 | |
7351a482 SW |
1753 | packet_pos = skb->data + ogm_offset; |
1754 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1755 | } |
c3e29312 ML |
1756 | |
1757 | kfree_skb(skb); | |
1758 | return NET_RX_SUCCESS; | |
fc957275 | 1759 | } |
1c280471 | 1760 | |
1b371d13 SW |
1761 | /** |
1762 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1763 | * @orig_node: the orig_node for which the neighbors are printed |
1764 | * @if_outgoing: outgoing interface for these entries | |
1765 | * @seq: debugfs table seq_file struct | |
1766 | * | |
1767 | * Must be called while holding an rcu lock. | |
1768 | */ | |
1769 | static void | |
1770 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1771 | struct batadv_hard_iface *if_outgoing, | |
1772 | struct seq_file *seq) | |
1773 | { | |
1774 | struct batadv_neigh_node *neigh_node; | |
1775 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1776 | ||
1777 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1778 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1779 | if (!n_ifinfo) | |
1780 | continue; | |
1781 | ||
1782 | seq_printf(seq, " %pM (%3i)", | |
1783 | neigh_node->addr, | |
1784 | n_ifinfo->bat_iv.tq_avg); | |
1785 | ||
1786 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
1787 | } | |
1788 | } | |
1789 | ||
737a2a22 AQ |
1790 | /** |
1791 | * batadv_iv_ogm_orig_print - print the originator table | |
1792 | * @bat_priv: the bat priv with all the soft interface information | |
1793 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1794 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1795 | */ |
1796 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1797 | struct seq_file *seq, |
1798 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1799 | { |
89652331 | 1800 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1801 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1802 | int last_seen_msecs, last_seen_secs; | |
1803 | struct batadv_orig_node *orig_node; | |
89652331 | 1804 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1805 | unsigned long last_seen_jiffies; |
1806 | struct hlist_head *head; | |
1807 | int batman_count = 0; | |
1808 | uint32_t i; | |
1809 | ||
1810 | seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", | |
1811 | "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, | |
1812 | "Nexthop", "outgoingIF", "Potential nexthops"); | |
1813 | ||
1814 | for (i = 0; i < hash->size; i++) { | |
1815 | head = &hash->table[i]; | |
1816 | ||
1817 | rcu_read_lock(); | |
1818 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1819 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1820 | if_outgoing); |
737a2a22 AQ |
1821 | if (!neigh_node) |
1822 | continue; | |
1823 | ||
89652331 | 1824 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1825 | if_outgoing); |
89652331 SW |
1826 | if (!n_ifinfo) |
1827 | goto next; | |
1828 | ||
1829 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1830 | goto next; |
1831 | ||
1832 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1833 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1834 | last_seen_secs = last_seen_msecs / 1000; | |
1835 | last_seen_msecs = last_seen_msecs % 1000; | |
1836 | ||
1837 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1838 | orig_node->orig, last_seen_secs, | |
89652331 | 1839 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1840 | neigh_node->addr, |
1841 | neigh_node->if_incoming->net_dev->name); | |
1842 | ||
cb1c92ec SW |
1843 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1844 | seq); | |
737a2a22 AQ |
1845 | seq_puts(seq, "\n"); |
1846 | batman_count++; | |
1847 | ||
1848 | next: | |
1849 | batadv_neigh_node_free_ref(neigh_node); | |
89652331 SW |
1850 | if (n_ifinfo) |
1851 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
737a2a22 AQ |
1852 | } |
1853 | rcu_read_unlock(); | |
1854 | } | |
1855 | ||
1856 | if (batman_count == 0) | |
1857 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1858 | } | |
1859 | ||
a3285a8f AQ |
1860 | /** |
1861 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
1862 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 1863 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 1864 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1865 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f AQ |
1866 | * |
1867 | * Returns a value less, equal to or greater than 0 if the metric via neigh1 is | |
1868 | * lower, the same as or higher than the metric via neigh2 | |
1869 | */ | |
1870 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
1871 | struct batadv_hard_iface *if_outgoing1, |
1872 | struct batadv_neigh_node *neigh2, | |
1873 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 1874 | { |
89652331 | 1875 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
a3285a8f | 1876 | uint8_t tq1, tq2; |
89652331 SW |
1877 | int diff; |
1878 | ||
1879 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
1880 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 1881 | |
89652331 SW |
1882 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
1883 | diff = 0; | |
1884 | goto out; | |
1885 | } | |
a3285a8f | 1886 | |
89652331 SW |
1887 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
1888 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1889 | diff = tq1 - tq2; | |
1890 | ||
1891 | out: | |
1892 | if (neigh1_ifinfo) | |
1893 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
1894 | if (neigh2_ifinfo) | |
1895 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
1896 | ||
1897 | return diff; | |
a3285a8f AQ |
1898 | } |
1899 | ||
c43c981e AQ |
1900 | /** |
1901 | * batadv_iv_ogm_neigh_is_eob - check if neigh1 is equally good or better than | |
1902 | * neigh2 from the metric prospective | |
1903 | * @neigh1: the first neighbor object of the comparison | |
95298a91 | 1904 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 1905 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1906 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 1907 | * |
89652331 SW |
1908 | * Returns true if the metric via neigh1 is equally good or better than |
1909 | * the metric via neigh2, false otherwise. | |
c43c981e | 1910 | */ |
89652331 SW |
1911 | static bool |
1912 | batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, | |
1913 | struct batadv_hard_iface *if_outgoing1, | |
1914 | struct batadv_neigh_node *neigh2, | |
1915 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 1916 | { |
89652331 SW |
1917 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
1918 | uint8_t tq1, tq2; | |
1919 | bool ret; | |
c43c981e | 1920 | |
89652331 SW |
1921 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
1922 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
1923 | ||
1924 | /* we can't say that the metric is better */ | |
1925 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
1926 | ret = false; | |
1927 | goto out; | |
1928 | } | |
1929 | ||
1930 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
1931 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1932 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
1933 | ||
1934 | out: | |
1935 | if (neigh1_ifinfo) | |
1936 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
1937 | if (neigh2_ifinfo) | |
1938 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
1939 | ||
1940 | return ret; | |
c43c981e AQ |
1941 | } |
1942 | ||
56303d34 | 1943 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 1944 | .name = "BATMAN_IV", |
fe8bc396 SE |
1945 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
1946 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
1947 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
1948 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
1949 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
1950 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
a3285a8f | 1951 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
c43c981e | 1952 | .bat_neigh_is_equiv_or_better = batadv_iv_ogm_neigh_is_eob, |
737a2a22 | 1953 | .bat_orig_print = batadv_iv_ogm_orig_print, |
d0015fdd AQ |
1954 | .bat_orig_free = batadv_iv_ogm_orig_free, |
1955 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, | |
1956 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, | |
1c280471 ML |
1957 | }; |
1958 | ||
81c524f7 | 1959 | int __init batadv_iv_init(void) |
1c280471 | 1960 | { |
c3e29312 ML |
1961 | int ret; |
1962 | ||
1963 | /* batman originator packet */ | |
acd34afa SE |
1964 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
1965 | batadv_iv_ogm_receive); | |
c3e29312 ML |
1966 | if (ret < 0) |
1967 | goto out; | |
1968 | ||
fe8bc396 | 1969 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
1970 | if (ret < 0) |
1971 | goto handler_unregister; | |
1972 | ||
1973 | goto out; | |
1974 | ||
1975 | handler_unregister: | |
acd34afa | 1976 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
1977 | out: |
1978 | return ret; | |
1c280471 | 1979 | } |