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9f6446c7 | 1 | /* Copyright (C) 2007-2015 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 ML |
310 | uint32_t random_seqno; |
311 | ||
312 | /* randomize initial seqno to avoid collision */ | |
313 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 314 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 315 | |
14511519 ML |
316 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
317 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
318 | if (!ogm_buff) | |
42d9f2cb | 319 | return -ENOMEM; |
77af7575 | 320 | |
14511519 ML |
321 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
322 | ||
323 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
324 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
325 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
326 | batadv_ogm_packet->ttl = 2; | |
96412690 | 327 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 328 | batadv_ogm_packet->reserved = 0; |
96412690 | 329 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 330 | |
42d9f2cb | 331 | return 0; |
d0b9fd89 ML |
332 | } |
333 | ||
56303d34 | 334 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 335 | { |
14511519 ML |
336 | kfree(hard_iface->bat_iv.ogm_buff); |
337 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
338 | } |
339 | ||
56303d34 | 340 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 341 | { |
96412690 | 342 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 343 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 344 | |
14511519 | 345 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
346 | ether_addr_copy(batadv_ogm_packet->orig, |
347 | hard_iface->net_dev->dev_addr); | |
348 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
349 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
350 | } |
351 | ||
56303d34 SE |
352 | static void |
353 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 354 | { |
96412690 | 355 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 356 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 357 | |
14511519 | 358 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
96412690 | 359 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
a40d9b07 | 360 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
361 | } |
362 | ||
b9dacc52 | 363 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 364 | static unsigned long |
56303d34 | 365 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 366 | { |
42d0b044 SE |
367 | unsigned int msecs; |
368 | ||
369 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 370 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
371 | |
372 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
373 | } |
374 | ||
375 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 376 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 377 | { |
e76e4320 | 378 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
379 | } |
380 | ||
381 | /* apply hop penalty for a normal link */ | |
56303d34 SE |
382 | static uint8_t batadv_hop_penalty(uint8_t tq, |
383 | const struct batadv_priv *bat_priv) | |
b9dacc52 ML |
384 | { |
385 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
386 | int new_tq; |
387 | ||
388 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
389 | new_tq /= BATADV_TQ_MAX_VALUE; | |
390 | ||
391 | return new_tq; | |
b9dacc52 ML |
392 | } |
393 | ||
fc957275 | 394 | /* is there another aggregated packet here? */ |
9fd9b19e MP |
395 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
396 | __be16 tvlv_len) | |
fc957275 | 397 | { |
08c36d3e SE |
398 | int next_buff_pos = 0; |
399 | ||
7e071c79 | 400 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 401 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
402 | |
403 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 404 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
405 | } |
406 | ||
b9dacc52 | 407 | /* send a batman ogm to a given interface */ |
56303d34 SE |
408 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
409 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 410 | { |
56303d34 | 411 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 412 | const char *fwd_str; |
b9dacc52 ML |
413 | uint8_t packet_num; |
414 | int16_t buff_pos; | |
96412690 | 415 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 416 | struct sk_buff *skb; |
c67893d1 | 417 | uint8_t *packet_pos; |
b9dacc52 | 418 | |
e9a4f295 | 419 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
420 | return; |
421 | ||
422 | packet_num = 0; | |
423 | buff_pos = 0; | |
c67893d1 SE |
424 | packet_pos = forw_packet->skb->data; |
425 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
426 | |
427 | /* adjust all flags and log packets */ | |
fe8bc396 | 428 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 429 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 430 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
431 | * ordinary base packet |
432 | */ | |
8de47de5 SE |
433 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
434 | forw_packet->if_incoming == hard_iface) | |
96412690 | 435 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 436 | else |
96412690 | 437 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 438 | |
c67893d1 SE |
439 | if (packet_num > 0 || !forw_packet->own) |
440 | fwd_str = "Forwarding"; | |
441 | else | |
442 | fwd_str = "Sending own"; | |
443 | ||
39c75a51 | 444 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 445 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 446 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
447 | batadv_ogm_packet->orig, |
448 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 449 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
96412690 | 450 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? |
1eda58bf | 451 | "on" : "off"), |
e1bf0c14 | 452 | hard_iface->net_dev->name, |
1eda58bf | 453 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 454 | |
7e071c79 | 455 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 456 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 457 | packet_num++; |
c67893d1 SE |
458 | packet_pos = forw_packet->skb->data + buff_pos; |
459 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
460 | } |
461 | ||
462 | /* create clone because function is called more than once */ | |
463 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 464 | if (skb) { |
d69909d2 SE |
465 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
466 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 467 | skb->len + ETH_HLEN); |
3193e8fd | 468 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
f8214865 | 469 | } |
b9dacc52 ML |
470 | } |
471 | ||
472 | /* send a batman ogm packet */ | |
56303d34 | 473 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 474 | { |
b9dacc52 | 475 | struct net_device *soft_iface; |
56303d34 SE |
476 | struct batadv_priv *bat_priv; |
477 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
478 | |
479 | if (!forw_packet->if_incoming) { | |
86ceb360 | 480 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
481 | goto out; |
482 | } | |
483 | ||
484 | soft_iface = forw_packet->if_incoming->soft_iface; | |
485 | bat_priv = netdev_priv(soft_iface); | |
486 | ||
ef0a937f | 487 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
488 | goto out; |
489 | ||
ef0a937f | 490 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
491 | goto out; |
492 | ||
ef0a937f | 493 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 494 | goto out; |
b9dacc52 | 495 | |
ef0a937f SW |
496 | primary_if = batadv_primary_if_get_selected(bat_priv); |
497 | if (!primary_if) | |
498 | goto out; | |
b9dacc52 | 499 | |
ef0a937f SW |
500 | /* only for one specific outgoing interface */ |
501 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
502 | |
503 | out: | |
504 | if (primary_if) | |
e5d89254 | 505 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
506 | } |
507 | ||
ef0a937f SW |
508 | /** |
509 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
510 | * existing forward packet | |
511 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
512 | * @bat_priv: the bat priv with all the soft interface information | |
513 | * @packet_len: (total) length of the OGM | |
514 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 515 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
516 | * @if_incoming: interface where the packet was received |
517 | * @if_outgoing: interface for which the retransmission should be considered | |
518 | * @forw_packet: the forwarded packet which should be checked | |
519 | * | |
520 | * Returns true if new_packet can be aggregated with forw_packet | |
521 | */ | |
fe8bc396 | 522 | static bool |
96412690 | 523 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 524 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
525 | int packet_len, unsigned long send_time, |
526 | bool directlink, | |
56303d34 | 527 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 528 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 529 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 530 | { |
96412690 | 531 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 532 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 533 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 534 | bool res = false; |
42d0b044 | 535 | unsigned long aggregation_end_time; |
b9dacc52 | 536 | |
96412690 | 537 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
538 | aggregation_end_time = send_time; |
539 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 540 | |
9cfc7bd6 | 541 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
542 | * if: |
543 | * | |
544 | * - the send time is within our MAX_AGGREGATION_MS time | |
545 | * - the resulting packet wont be bigger than | |
546 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 547 | * otherwise aggregation is not possible |
b9dacc52 | 548 | */ |
8f34b388 MP |
549 | if (!time_before(send_time, forw_packet->send_time) || |
550 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
551 | return false; | |
552 | ||
553 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
554 | return false; | |
555 | ||
556 | /* packet is not leaving on the same interface. */ | |
557 | if (forw_packet->if_outgoing != if_outgoing) | |
558 | return false; | |
559 | ||
560 | /* check aggregation compatibility | |
561 | * -> direct link packets are broadcasted on | |
562 | * their interface only | |
563 | * -> aggregate packet if the current packet is | |
564 | * a "global" packet as well as the base | |
565 | * packet | |
566 | */ | |
567 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
568 | if (!primary_if) | |
569 | return false; | |
ef0a937f | 570 | |
8f34b388 MP |
571 | /* packets without direct link flag and high TTL |
572 | * are flooded through the net | |
573 | */ | |
574 | if (!directlink && | |
575 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
576 | batadv_ogm_packet->ttl != 1 && | |
577 | ||
578 | /* own packets originating non-primary | |
579 | * interfaces leave only that interface | |
580 | */ | |
581 | (!forw_packet->own || | |
582 | forw_packet->if_incoming == primary_if)) { | |
583 | res = true; | |
584 | goto out; | |
585 | } | |
b9dacc52 | 586 | |
8f34b388 MP |
587 | /* if the incoming packet is sent via this one |
588 | * interface only - we still can aggregate | |
589 | */ | |
590 | if (directlink && | |
591 | new_bat_ogm_packet->ttl == 1 && | |
592 | forw_packet->if_incoming == if_incoming && | |
593 | ||
594 | /* packets from direct neighbors or | |
595 | * own secondary interface packets | |
596 | * (= secondary interface packets in general) | |
597 | */ | |
598 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
599 | (forw_packet->own && | |
600 | forw_packet->if_incoming != primary_if))) { | |
601 | res = true; | |
602 | goto out; | |
b9dacc52 ML |
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"); |
940d156f | 645 | goto out_free_outgoing; |
b9dacc52 ML |
646 | } |
647 | } | |
648 | ||
649 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
650 | if (!forw_packet_aggr) |
651 | goto out_nomem; | |
b9dacc52 | 652 | |
940d156f MP |
653 | if (atomic_read(&bat_priv->aggregated_ogms) && |
654 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 655 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 656 | else |
5b246574 SE |
657 | skb_size = packet_len; |
658 | ||
41ab6c48 | 659 | skb_size += ETH_HLEN; |
b9dacc52 | 660 | |
41ab6c48 | 661 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
662 | if (!forw_packet_aggr->skb) |
663 | goto out_free_forw_packet; | |
c54f38c9 | 664 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 665 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 666 | |
b9dacc52 ML |
667 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
668 | forw_packet_aggr->packet_len = packet_len; | |
669 | memcpy(skb_buff, packet_buff, packet_len); | |
670 | ||
671 | forw_packet_aggr->own = own_packet; | |
672 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 673 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 674 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 675 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
676 | forw_packet_aggr->send_time = send_time; |
677 | ||
678 | /* save packet direct link flag status */ | |
679 | if (direct_link) | |
680 | forw_packet_aggr->direct_link_flags |= 1; | |
681 | ||
682 | /* add new packet to packet list */ | |
683 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
684 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
685 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
686 | ||
687 | /* start timer for this packet */ | |
688 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 689 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 690 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
691 | &forw_packet_aggr->delayed_work, |
692 | send_time - jiffies); | |
693 | ||
694 | return; | |
940d156f MP |
695 | out_free_forw_packet: |
696 | kfree(forw_packet_aggr); | |
697 | out_nomem: | |
698 | if (!own_packet) | |
699 | atomic_inc(&bat_priv->batman_queue_left); | |
700 | out_free_outgoing: | |
ef0a937f SW |
701 | batadv_hardif_free_ref(if_outgoing); |
702 | out_free_incoming: | |
e5d89254 | 703 | batadv_hardif_free_ref(if_incoming); |
b9dacc52 ML |
704 | } |
705 | ||
706 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 707 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
708 | const unsigned char *packet_buff, |
709 | int packet_len, bool direct_link) | |
b9dacc52 ML |
710 | { |
711 | unsigned char *skb_buff; | |
8de47de5 | 712 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
713 | |
714 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
715 | memcpy(skb_buff, packet_buff, packet_len); | |
716 | forw_packet_aggr->packet_len += packet_len; | |
717 | forw_packet_aggr->num_packets++; | |
718 | ||
719 | /* save packet direct link flag status */ | |
8de47de5 SE |
720 | if (direct_link) { |
721 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
722 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
723 | } | |
b9dacc52 ML |
724 | } |
725 | ||
ef0a937f SW |
726 | /** |
727 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
728 | * @bat_priv: the bat priv with all the soft interface information | |
729 | * @packet_buff: pointer to the OGM | |
730 | * @packet_len: (total) length of the OGM | |
731 | * @if_incoming: interface where the packet was received | |
732 | * @if_outgoing: interface for which the retransmission should be considered | |
733 | * @own_packet: true if it is a self-generated ogm | |
734 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
735 | */ | |
56303d34 | 736 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
737 | unsigned char *packet_buff, |
738 | int packet_len, | |
56303d34 | 739 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 740 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 741 | int own_packet, unsigned long send_time) |
b9dacc52 | 742 | { |
9cfc7bd6 | 743 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
744 | * _pos -> pointer to the position in the queue |
745 | */ | |
56303d34 SE |
746 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
747 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 748 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 749 | bool direct_link; |
42d0b044 | 750 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 751 | |
96412690 | 752 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 753 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 754 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
755 | |
756 | /* find position for the packet in the forward queue */ | |
757 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
758 | /* own packets are not to be aggregated */ | |
56489151 | 759 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 760 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 761 | &bat_priv->forw_bat_list, list) { |
96412690 | 762 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
763 | bat_priv, packet_len, |
764 | send_time, direct_link, | |
765 | if_incoming, | |
ef0a937f | 766 | if_outgoing, |
fe8bc396 | 767 | forw_packet_pos)) { |
b9dacc52 ML |
768 | forw_packet_aggr = forw_packet_pos; |
769 | break; | |
770 | } | |
771 | } | |
772 | } | |
773 | ||
774 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
775 | * suitable aggregation packet found |
776 | */ | |
b9dacc52 ML |
777 | if (!forw_packet_aggr) { |
778 | /* the following section can run without the lock */ | |
779 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
780 | ||
9cfc7bd6 | 781 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
782 | * we hold it back for a while, so that it might be aggregated |
783 | * later on | |
784 | */ | |
42d0b044 SE |
785 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
786 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 787 | |
fe8bc396 SE |
788 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
789 | send_time, direct_link, | |
ef0a937f SW |
790 | if_incoming, if_outgoing, |
791 | own_packet); | |
b9dacc52 | 792 | } else { |
fe8bc396 SE |
793 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
794 | packet_len, direct_link); | |
b9dacc52 ML |
795 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
796 | } | |
797 | } | |
798 | ||
56303d34 | 799 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 800 | const struct ethhdr *ethhdr, |
96412690 | 801 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
802 | bool is_single_hop_neigh, |
803 | bool is_from_best_next_hop, | |
ef0a937f SW |
804 | struct batadv_hard_iface *if_incoming, |
805 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 806 | { |
56303d34 | 807 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
ef261577 | 808 | uint16_t tvlv_len; |
b9dacc52 | 809 | |
a40d9b07 | 810 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 811 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
812 | return; |
813 | } | |
814 | ||
13b2541b ML |
815 | if (!is_from_best_next_hop) { |
816 | /* Mark the forwarded packet when it is not coming from our | |
817 | * best next hop. We still need to forward the packet for our | |
818 | * neighbor link quality detection to work in case the packet | |
819 | * originated from a single hop neighbor. Otherwise we can | |
820 | * simply drop the ogm. | |
821 | */ | |
822 | if (is_single_hop_neigh) | |
96412690 | 823 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
824 | else |
825 | return; | |
826 | } | |
b9dacc52 | 827 | |
ef261577 | 828 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 829 | |
a40d9b07 | 830 | batadv_ogm_packet->ttl--; |
8fdd0153 | 831 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 832 | |
b9dacc52 | 833 | /* apply hop penalty */ |
96412690 | 834 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 835 | bat_priv); |
b9dacc52 | 836 | |
39c75a51 | 837 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 838 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 839 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 840 | |
b9dacc52 | 841 | /* switch of primaries first hop flag when forwarding */ |
96412690 | 842 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
75cd33f8 | 843 | if (is_single_hop_neigh) |
96412690 | 844 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 845 | else |
96412690 | 846 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 847 | |
96412690 | 848 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 849 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
850 | if_incoming, if_outgoing, 0, |
851 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
852 | } |
853 | ||
d9896617 AQ |
854 | /** |
855 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
856 | * the given interface | |
857 | * @hard_iface: the interface for which the windows have to be shifted | |
858 | */ | |
859 | static void | |
860 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
861 | { | |
862 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
863 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
864 | struct hlist_head *head; | |
865 | struct batadv_orig_node *orig_node; | |
866 | unsigned long *word; | |
867 | uint32_t i; | |
868 | size_t word_index; | |
869 | uint8_t *w; | |
bbad0a5e | 870 | int if_num; |
d9896617 AQ |
871 | |
872 | for (i = 0; i < hash->size; i++) { | |
873 | head = &hash->table[i]; | |
874 | ||
875 | rcu_read_lock(); | |
876 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 877 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 878 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 879 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
880 | |
881 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
882 | if_num = hard_iface->if_num; |
883 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 884 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 885 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
886 | } |
887 | rcu_read_unlock(); | |
888 | } | |
889 | } | |
890 | ||
56303d34 | 891 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 892 | { |
56303d34 | 893 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 894 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 895 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 896 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 897 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
bbb1f90e | 898 | uint32_t seqno; |
ef261577 | 899 | uint16_t tvlv_len = 0; |
ef0a937f | 900 | unsigned long send_time; |
b9dacc52 | 901 | |
e5d89254 | 902 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 903 | |
e1bf0c14 ML |
904 | if (hard_iface == primary_if) { |
905 | /* tt changes have to be committed before the tvlv data is | |
906 | * appended as it may alter the tt tvlv container | |
907 | */ | |
908 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
909 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
910 | ogm_buff_len, | |
911 | BATADV_OGM_HLEN); | |
e1bf0c14 | 912 | } |
be9aa4c1 | 913 | |
14511519 | 914 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 915 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
916 | |
917 | /* change sequence number to network order */ | |
14511519 | 918 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 919 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 920 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 921 | |
d9896617 | 922 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 923 | |
ef0a937f SW |
924 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
925 | ||
926 | if (hard_iface != primary_if) { | |
927 | /* OGMs from secondary interfaces are only scheduled on their | |
928 | * respective interfaces. | |
929 | */ | |
930 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
931 | hard_iface, hard_iface, 1, send_time); | |
932 | goto out; | |
933 | } | |
934 | ||
935 | /* OGMs from primary interfaces are scheduled on all | |
936 | * interfaces. | |
937 | */ | |
938 | rcu_read_lock(); | |
939 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
940 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
941 | continue; | |
942 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, | |
943 | *ogm_buff_len, hard_iface, | |
944 | tmp_hard_iface, 1, send_time); | |
945 | } | |
946 | rcu_read_unlock(); | |
947 | ||
948 | out: | |
b9dacc52 | 949 | if (primary_if) |
e5d89254 | 950 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
951 | } |
952 | ||
89652331 SW |
953 | /** |
954 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
955 | * originator | |
956 | * @bat_priv: the bat priv with all the soft interface information | |
957 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 958 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
959 | * @ethhdr: Ethernet header of the OGM |
960 | * @batadv_ogm_packet: the ogm packet | |
961 | * @if_incoming: interface where the packet was received | |
962 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
963 | * @dup_status: the duplicate status of this ogm packet. |
964 | */ | |
fe8bc396 | 965 | static void |
56303d34 SE |
966 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
967 | struct batadv_orig_node *orig_node, | |
7351a482 | 968 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 969 | const struct ethhdr *ethhdr, |
96412690 | 970 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 971 | struct batadv_hard_iface *if_incoming, |
89652331 | 972 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 973 | enum batadv_dup_status dup_status) |
fc957275 | 974 | { |
89652331 SW |
975 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
976 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
56303d34 SE |
977 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
978 | struct batadv_neigh_node *router = NULL; | |
979 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 980 | int if_num; |
bbb1f90e | 981 | uint8_t sum_orig, sum_neigh; |
1eda58bf | 982 | uint8_t *neigh_addr; |
bbb1f90e | 983 | uint8_t tq_avg; |
fc957275 | 984 | |
39c75a51 | 985 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 986 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
987 | |
988 | rcu_read_lock(); | |
b67bfe0d | 989 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 990 | &orig_node->neigh_list, list) { |
1eda58bf SE |
991 | neigh_addr = tmp_neigh_node->addr; |
992 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
993 | tmp_neigh_node->if_incoming == if_incoming && | |
994 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { | |
38dc40ef | 995 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
7d211efc | 996 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
997 | neigh_node = tmp_neigh_node; |
998 | continue; | |
999 | } | |
1000 | ||
7c24bbbe | 1001 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1002 | continue; |
1003 | ||
89652331 SW |
1004 | /* only update the entry for this outgoing interface */ |
1005 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1006 | if_outgoing); | |
1007 | if (!neigh_ifinfo) | |
1008 | continue; | |
1009 | ||
1010 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1011 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1012 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1013 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1014 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1015 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1016 | ||
1017 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1018 | neigh_ifinfo = NULL; | |
fc957275 ML |
1019 | } |
1020 | ||
1021 | if (!neigh_node) { | |
56303d34 | 1022 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1023 | |
bbad0a5e | 1024 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1025 | if (!orig_tmp) |
1026 | goto unlock; | |
1027 | ||
fe8bc396 SE |
1028 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1029 | ethhdr->h_source, | |
863dd7a8 | 1030 | orig_node, orig_tmp); |
fc957275 | 1031 | |
7d211efc | 1032 | batadv_orig_node_free_ref(orig_tmp); |
fc957275 ML |
1033 | if (!neigh_node) |
1034 | goto unlock; | |
1035 | } else | |
39c75a51 | 1036 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1037 | "Updating existing last-hop neighbor of originator\n"); |
fc957275 ML |
1038 | |
1039 | rcu_read_unlock(); | |
89652331 SW |
1040 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1041 | if (!neigh_ifinfo) | |
1042 | goto out; | |
fc957275 | 1043 | |
d7b2a97e | 1044 | neigh_node->last_seen = jiffies; |
fc957275 | 1045 | |
89652331 SW |
1046 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1047 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1048 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1049 | batadv_ogm_packet->tq); |
89652331 SW |
1050 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1051 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1052 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1053 | |
7c24bbbe | 1054 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1055 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1056 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1057 | } |
1058 | ||
fc957275 | 1059 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1060 | * to change |
1061 | */ | |
7351a482 | 1062 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1063 | if (router == neigh_node) |
e1bf0c14 | 1064 | goto out; |
fc957275 | 1065 | |
89652331 SW |
1066 | if (router) { |
1067 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1068 | if (!router_ifinfo) | |
1069 | goto out; | |
1070 | ||
1071 | /* if this neighbor does not offer a better TQ we won't | |
1072 | * consider it | |
1073 | */ | |
1074 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1075 | goto out; | |
1076 | } | |
fc957275 ML |
1077 | |
1078 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1079 | * won't consider it either |
1080 | */ | |
89652331 | 1081 | if (router_ifinfo && |
01b97a3e | 1082 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1083 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1084 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1085 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1086 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1087 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1088 | |
1089 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1090 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1091 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1092 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1093 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1094 | |
bbb1f90e | 1095 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1096 | goto out; |
fc957275 ML |
1097 | } |
1098 | ||
7351a482 | 1099 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1100 | goto out; |
1101 | ||
1102 | unlock: | |
1103 | rcu_read_unlock(); | |
1104 | out: | |
1105 | if (neigh_node) | |
7d211efc | 1106 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 | 1107 | if (router) |
7d211efc | 1108 | batadv_neigh_node_free_ref(router); |
89652331 SW |
1109 | if (neigh_ifinfo) |
1110 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1111 | if (router_ifinfo) | |
1112 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 ML |
1113 | } |
1114 | ||
89652331 SW |
1115 | /** |
1116 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1117 | * @orig_node: the orig node who originally emitted the ogm packet | |
1118 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1119 | * @batadv_ogm_packet: the ogm packet | |
1120 | * @if_incoming: interface where the packet was received | |
1121 | * @if_outgoing: interface for which the retransmission should be considered | |
1122 | * | |
1123 | * Returns 1 if the link can be considered bidirectional, 0 otherwise | |
1124 | */ | |
56303d34 SE |
1125 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1126 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 1127 | struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1128 | struct batadv_hard_iface *if_incoming, |
1129 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1130 | { |
56303d34 SE |
1131 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1132 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1133 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
fc957275 | 1134 | uint8_t total_count; |
42d0b044 SE |
1135 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
1136 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; | |
bbad0a5e | 1137 | int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; |
42d0b044 | 1138 | unsigned int combined_tq; |
c0398768 | 1139 | int tq_iface_penalty; |
fc957275 ML |
1140 | |
1141 | /* find corresponding one hop neighbor */ | |
1142 | rcu_read_lock(); | |
b67bfe0d | 1143 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1144 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1145 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1146 | orig_neigh_node->orig)) | |
fc957275 ML |
1147 | continue; |
1148 | ||
1149 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1150 | continue; | |
1151 | ||
1152 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
1153 | continue; | |
1154 | ||
1155 | neigh_node = tmp_neigh_node; | |
1156 | break; | |
1157 | } | |
1158 | rcu_read_unlock(); | |
1159 | ||
1160 | if (!neigh_node) | |
fe8bc396 SE |
1161 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1162 | orig_neigh_node->orig, | |
1163 | orig_neigh_node, | |
863dd7a8 | 1164 | orig_neigh_node); |
fc957275 ML |
1165 | |
1166 | if (!neigh_node) | |
1167 | goto out; | |
1168 | ||
d7b2a97e | 1169 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1170 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1171 | neigh_node->last_seen = jiffies; |
fc957275 | 1172 | |
d7b2a97e | 1173 | orig_node->last_seen = jiffies; |
fc957275 ML |
1174 | |
1175 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1176 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1177 | if_num = if_incoming->if_num; | |
1178 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1179 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1180 | if (neigh_ifinfo) { | |
1181 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
1182 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1183 | } else { | |
1184 | neigh_rq_count = 0; | |
1185 | } | |
bbad0a5e | 1186 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1187 | |
1188 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1189 | if (orig_eq_count > neigh_rq_count) |
1190 | total_count = neigh_rq_count; | |
1191 | else | |
1192 | total_count = orig_eq_count; | |
fc957275 | 1193 | |
9cfc7bd6 SE |
1194 | /* if we have too few packets (too less data) we set tq_own to zero |
1195 | * if we receive too few packets it is not considered bidirectional | |
1196 | */ | |
42d0b044 SE |
1197 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1198 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1199 | tq_own = 0; |
1200 | else | |
1201 | /* neigh_node->real_packet_count is never zero as we | |
1202 | * only purge old information when getting new | |
9cfc7bd6 SE |
1203 | * information |
1204 | */ | |
42d0b044 | 1205 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1206 | |
21a1236b | 1207 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1208 | * affect the nearly-symmetric links only a little, but |
1209 | * punishes asymmetric links more. This will give a value | |
1210 | * between 0 and TQ_MAX_VALUE | |
1211 | */ | |
42d0b044 SE |
1212 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1213 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1214 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1215 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1216 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1217 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1218 | inv_asym_penalty /= neigh_rq_max_cube; | |
1219 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1220 | ||
c0398768 SW |
1221 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1222 | * interfaces and other half duplex devices suffer from throughput | |
1223 | * drops as they can't send and receive at the same time. | |
1224 | */ | |
1225 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1226 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1227 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1228 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1229 | bat_priv); | |
1230 | ||
1231 | combined_tq = batadv_ogm_packet->tq * | |
1232 | tq_own * | |
1233 | tq_asym_penalty * | |
1234 | tq_iface_penalty; | |
1235 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1236 | BATADV_TQ_MAX_VALUE * | |
1237 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1238 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1239 | |
39c75a51 | 1240 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1241 | "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 | 1242 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1243 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1244 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1245 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1246 | |
1247 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1248 | * consider it bidirectional |
1249 | */ | |
96412690 | 1250 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
fc957275 ML |
1251 | ret = 1; |
1252 | ||
1253 | out: | |
1254 | if (neigh_node) | |
7d211efc | 1255 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
1256 | return ret; |
1257 | } | |
1258 | ||
7c24bbbe SW |
1259 | /** |
1260 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1261 | * adjust the sequence number and find out whether it is a duplicate | |
1262 | * @ethhdr: ethernet header of the packet | |
1263 | * @batadv_ogm_packet: OGM packet to be considered | |
1264 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1265 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe SW |
1266 | * |
1267 | * Returns duplicate status as enum batadv_dup_status | |
fc957275 | 1268 | */ |
7c24bbbe | 1269 | static enum batadv_dup_status |
fe8bc396 | 1270 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1271 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1272 | const struct batadv_hard_iface *if_incoming, |
1273 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1274 | { |
56303d34 SE |
1275 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1276 | struct batadv_orig_node *orig_node; | |
7351a482 | 1277 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1278 | struct batadv_neigh_node *neigh_node; |
1279 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
7c24bbbe | 1280 | int is_dup; |
fc957275 ML |
1281 | int32_t seq_diff; |
1282 | int need_update = 0; | |
7c24bbbe SW |
1283 | int set_mark; |
1284 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
96412690 | 1285 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
1eda58bf | 1286 | uint8_t *neigh_addr; |
bbb1f90e | 1287 | uint8_t packet_count; |
0538f759 | 1288 | unsigned long *bitmap; |
fc957275 | 1289 | |
bbad0a5e | 1290 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1291 | if (!orig_node) |
7c24bbbe | 1292 | return BATADV_NO_DUP; |
fc957275 | 1293 | |
7351a482 SW |
1294 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1295 | if (WARN_ON(!orig_ifinfo)) { | |
1296 | batadv_orig_node_free_ref(orig_node); | |
1297 | return 0; | |
1298 | } | |
1299 | ||
bbad0a5e | 1300 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1301 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1302 | |
1303 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1304 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1305 | batadv_window_protected(bat_priv, seq_diff, |
7351a482 | 1306 | &orig_ifinfo->batman_seqno_reset)) { |
7c24bbbe | 1307 | ret = BATADV_PROTECTED; |
fc957275 | 1308 | goto out; |
7c24bbbe | 1309 | } |
fc957275 ML |
1310 | |
1311 | rcu_read_lock(); | |
89652331 SW |
1312 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1313 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1314 | if_outgoing); | |
1315 | if (!neigh_ifinfo) | |
1316 | continue; | |
1317 | ||
1318 | neigh_addr = neigh_node->addr; | |
1319 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1320 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1321 | seqno); |
1322 | ||
1eda58bf | 1323 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1324 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1325 | set_mark = 1; |
7c24bbbe SW |
1326 | if (is_dup) |
1327 | ret = BATADV_NEIGH_DUP; | |
1328 | } else { | |
fc957275 | 1329 | set_mark = 0; |
7c24bbbe SW |
1330 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1331 | ret = BATADV_ORIG_DUP; | |
1332 | } | |
fc957275 ML |
1333 | |
1334 | /* if the window moved, set the update flag. */ | |
89652331 | 1335 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1336 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1337 | seq_diff, set_mark); |
fc957275 | 1338 | |
89652331 | 1339 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1340 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 SW |
1341 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
1342 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
fc957275 ML |
1343 | } |
1344 | rcu_read_unlock(); | |
1345 | ||
1346 | if (need_update) { | |
39c75a51 | 1347 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1348 | "%s updating last_seqno: old %u, new %u\n", |
1349 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1350 | orig_ifinfo->last_real_seqno, seqno); | |
1351 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1352 | } |
1353 | ||
fc957275 | 1354 | out: |
bbad0a5e | 1355 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7d211efc | 1356 | batadv_orig_node_free_ref(orig_node); |
7351a482 SW |
1357 | if (orig_ifinfo) |
1358 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
fc957275 ML |
1359 | return ret; |
1360 | } | |
1361 | ||
7351a482 SW |
1362 | /** |
1363 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1364 | * @skb: the skb containing the OGM | |
95298a91 | 1365 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1366 | * @orig_node: the (cached) orig node for the originator of this OGM |
1367 | * @if_incoming: the interface where this packet was received | |
1368 | * @if_outgoing: the interface for which the packet should be considered | |
1369 | */ | |
1370 | static void | |
1371 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1372 | struct batadv_orig_node *orig_node, | |
1373 | struct batadv_hard_iface *if_incoming, | |
1374 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1375 | { |
56303d34 | 1376 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
56303d34 | 1377 | struct batadv_neigh_node *router = NULL, *router_router = NULL; |
7351a482 SW |
1378 | struct batadv_orig_node *orig_neigh_node; |
1379 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1380 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1381 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1382 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1383 | enum batadv_dup_status dup_status; |
7351a482 SW |
1384 | bool is_from_best_next_hop = false; |
1385 | bool is_single_hop_neigh = false; | |
1386 | bool sameseq, similar_ttl; | |
1387 | struct sk_buff *skb_priv; | |
1388 | struct ethhdr *ethhdr; | |
1eda58bf | 1389 | uint8_t *prev_sender; |
7351a482 | 1390 | int is_bidirect; |
fc957275 | 1391 | |
7351a482 SW |
1392 | /* create a private copy of the skb, as some functions change tq value |
1393 | * and/or flags. | |
fc957275 | 1394 | */ |
7351a482 SW |
1395 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1396 | if (!skb_priv) | |
fc957275 ML |
1397 | return; |
1398 | ||
7351a482 SW |
1399 | ethhdr = eth_hdr(skb_priv); |
1400 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1401 | |
7351a482 SW |
1402 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1403 | if_incoming, if_outgoing); | |
1404 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1405 | is_single_hop_neigh = true; |
fc957275 | 1406 | |
7c24bbbe | 1407 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1408 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1409 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1410 | ethhdr->h_source); | |
fc957275 ML |
1411 | goto out; |
1412 | } | |
1413 | ||
7351a482 | 1414 | if (ogm_packet->tq == 0) { |
39c75a51 | 1415 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1416 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1417 | goto out; |
1418 | } | |
1419 | ||
7351a482 | 1420 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1421 | if (router) { |
7351a482 SW |
1422 | router_router = batadv_orig_router_get(router->orig_node, |
1423 | if_outgoing); | |
1424 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1425 | } |
fc957275 | 1426 | |
7351a482 | 1427 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1428 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1429 | is_from_best_next_hop = true; |
1430 | ||
7351a482 | 1431 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1432 | /* avoid temporary routing loops */ |
1433 | if (router && router_router && | |
1eda58bf | 1434 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1435 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1436 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1437 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1438 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1439 | ethhdr->h_source); | |
fc957275 ML |
1440 | goto out; |
1441 | } | |
1442 | ||
7351a482 SW |
1443 | if (if_outgoing == BATADV_IF_DEFAULT) |
1444 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1445 | |
fc957275 | 1446 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1447 | * originator mac |
1448 | */ | |
c67893d1 SE |
1449 | if (is_single_hop_neigh) |
1450 | orig_neigh_node = orig_node; | |
1451 | else | |
bbad0a5e AQ |
1452 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1453 | ethhdr->h_source); | |
c67893d1 | 1454 | |
fc957275 ML |
1455 | if (!orig_neigh_node) |
1456 | goto out; | |
1457 | ||
d56b1705 MH |
1458 | /* Update nc_nodes of the originator */ |
1459 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1460 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1461 | |
7351a482 SW |
1462 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1463 | if_outgoing); | |
fc957275 ML |
1464 | |
1465 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1466 | * don't route towards it |
1467 | */ | |
fc957275 | 1468 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1469 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1470 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1471 | goto out_neigh; |
1472 | } | |
1473 | ||
fe8bc396 | 1474 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1475 | ogm_packet, if_incoming, |
1476 | if_outgoing); | |
fc957275 | 1477 | |
fc957275 | 1478 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1479 | * seqno and similar ttl as the non-duplicate |
1480 | */ | |
7351a482 SW |
1481 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1482 | if (!orig_ifinfo) | |
1483 | goto out_neigh; | |
1484 | ||
1485 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1486 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1487 | ||
7c24bbbe | 1488 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1489 | (sameseq && similar_ttl))) { |
1490 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1491 | orig_ifinfo, ethhdr, | |
1492 | ogm_packet, if_incoming, | |
1493 | if_outgoing, dup_status); | |
1494 | } | |
1495 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
fc957275 | 1496 | |
ef0a937f SW |
1497 | /* only forward for specific interface, not for the default one. */ |
1498 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1499 | goto out_neigh; | |
1500 | ||
fc957275 ML |
1501 | /* is single hop (direct) neighbor */ |
1502 | if (is_single_hop_neigh) { | |
7351a482 SW |
1503 | /* OGMs from secondary interfaces should only scheduled once |
1504 | * per interface where it has been received, not multiple times | |
1505 | */ | |
1506 | if ((ogm_packet->ttl <= 2) && | |
1507 | (if_incoming != if_outgoing)) { | |
1508 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1509 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1510 | goto out_neigh; | |
1511 | } | |
fc957275 | 1512 | /* mark direct link on incoming interface */ |
7351a482 | 1513 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1514 | is_single_hop_neigh, |
ef0a937f SW |
1515 | is_from_best_next_hop, if_incoming, |
1516 | if_outgoing); | |
fc957275 | 1517 | |
39c75a51 | 1518 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1519 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1520 | goto out_neigh; |
1521 | } | |
1522 | ||
1523 | /* multihop originator */ | |
fe8bc396 | 1524 | if (!is_bidirect) { |
39c75a51 | 1525 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1526 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1527 | goto out_neigh; |
1528 | } | |
1529 | ||
7c24bbbe | 1530 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1531 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1532 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1533 | goto out_neigh; |
1534 | } | |
1535 | ||
39c75a51 | 1536 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1537 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1538 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1539 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1540 | if_incoming, if_outgoing); |
fc957275 ML |
1541 | |
1542 | out_neigh: | |
1543 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
7d211efc | 1544 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 | 1545 | out: |
c1e517fb SW |
1546 | if (router_ifinfo) |
1547 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 | 1548 | if (router) |
7d211efc | 1549 | batadv_neigh_node_free_ref(router); |
fc957275 | 1550 | if (router_router) |
7d211efc | 1551 | batadv_neigh_node_free_ref(router_router); |
fc957275 | 1552 | if (orig_neigh_router) |
7d211efc | 1553 | batadv_neigh_node_free_ref(orig_neigh_router); |
fc957275 | 1554 | |
7351a482 SW |
1555 | kfree_skb(skb_priv); |
1556 | } | |
1557 | ||
1558 | /** | |
1559 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1560 | * @skb: the skb containing the OGM | |
1561 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1562 | * @if_incoming: the interface where this packet was receved | |
1563 | */ | |
1564 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1565 | struct batadv_hard_iface *if_incoming) | |
1566 | { | |
1567 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1568 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1569 | struct batadv_hard_iface *hard_iface; | |
1570 | struct batadv_ogm_packet *ogm_packet; | |
1571 | uint32_t if_incoming_seqno; | |
1572 | bool has_directlink_flag; | |
1573 | struct ethhdr *ethhdr; | |
1574 | bool is_my_oldorig = false; | |
1575 | bool is_my_addr = false; | |
1576 | bool is_my_orig = false; | |
1577 | ||
1578 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1579 | ethhdr = eth_hdr(skb); | |
1580 | ||
1581 | /* Silently drop when the batman packet is actually not a | |
1582 | * correct packet. | |
1583 | * | |
1584 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1585 | * minimum frame length of 64 byte) and the aggregation interprets | |
1586 | * it as an additional length. | |
1587 | * | |
1588 | * TODO: A more sane solution would be to have a bit in the | |
1589 | * batadv_ogm_packet to detect whether the packet is the last | |
1590 | * packet in an aggregation. Here we expect that the padding | |
1591 | * is always zero (or not 0x01) | |
1592 | */ | |
1593 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1594 | return; | |
1595 | ||
1596 | /* could be changed by schedule_own_packet() */ | |
1597 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1598 | ||
1599 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1600 | has_directlink_flag = true; | |
1601 | else | |
1602 | has_directlink_flag = false; | |
1603 | ||
1604 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1605 | "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", | |
1606 | ethhdr->h_source, if_incoming->net_dev->name, | |
1607 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1608 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1609 | ogm_packet->tq, ogm_packet->ttl, | |
1610 | ogm_packet->version, has_directlink_flag); | |
1611 | ||
1612 | rcu_read_lock(); | |
1613 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1614 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1615 | continue; | |
1616 | ||
1617 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1618 | continue; | |
1619 | ||
1620 | if (batadv_compare_eth(ethhdr->h_source, | |
1621 | hard_iface->net_dev->dev_addr)) | |
1622 | is_my_addr = true; | |
1623 | ||
1624 | if (batadv_compare_eth(ogm_packet->orig, | |
1625 | hard_iface->net_dev->dev_addr)) | |
1626 | is_my_orig = true; | |
1627 | ||
1628 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1629 | hard_iface->net_dev->dev_addr)) | |
1630 | is_my_oldorig = true; | |
1631 | } | |
1632 | rcu_read_unlock(); | |
1633 | ||
1634 | if (is_my_addr) { | |
1635 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1636 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1637 | ethhdr->h_source); | |
1638 | return; | |
1639 | } | |
1640 | ||
1641 | if (is_my_orig) { | |
1642 | unsigned long *word; | |
1643 | int offset; | |
1644 | int32_t bit_pos; | |
1645 | int16_t if_num; | |
1646 | uint8_t *weight; | |
1647 | ||
1648 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1649 | ethhdr->h_source); | |
1650 | if (!orig_neigh_node) | |
1651 | return; | |
1652 | ||
1653 | /* neighbor has to indicate direct link and it has to | |
1654 | * come via the corresponding interface | |
1655 | * save packet seqno for bidirectional check | |
1656 | */ | |
1657 | if (has_directlink_flag && | |
1658 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1659 | ogm_packet->orig)) { | |
1660 | if_num = if_incoming->if_num; | |
1661 | offset = if_num * BATADV_NUM_WORDS; | |
1662 | ||
1663 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1664 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1665 | bit_pos = if_incoming_seqno - 2; |
1666 | bit_pos -= ntohl(ogm_packet->seqno); | |
1667 | batadv_set_bit(word, bit_pos); | |
1668 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1669 | *weight = bitmap_weight(word, | |
1670 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1671 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1672 | } | |
1673 | ||
1674 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1675 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
1676 | batadv_orig_node_free_ref(orig_neigh_node); | |
1677 | return; | |
1678 | } | |
1679 | ||
1680 | if (is_my_oldorig) { | |
1681 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1682 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1683 | ethhdr->h_source); | |
1684 | return; | |
1685 | } | |
1686 | ||
1687 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1688 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1689 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1690 | ethhdr->h_source); | |
1691 | return; | |
1692 | } | |
1693 | ||
1694 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1695 | if (!orig_node) | |
1696 | return; | |
1697 | ||
1698 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1699 | if_incoming, BATADV_IF_DEFAULT); | |
1700 | ||
1701 | rcu_read_lock(); | |
1702 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1703 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1704 | continue; | |
1705 | ||
1706 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1707 | continue; | |
1708 | ||
1709 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1710 | if_incoming, hard_iface); | |
1711 | } | |
1712 | rcu_read_unlock(); | |
1713 | ||
7d211efc | 1714 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
1715 | } |
1716 | ||
fe8bc396 | 1717 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1718 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1719 | { |
56303d34 | 1720 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1721 | struct batadv_ogm_packet *ogm_packet; |
c67893d1 | 1722 | uint8_t *packet_pos; |
7351a482 | 1723 | int ogm_offset; |
ef261577 | 1724 | bool ret; |
c3e29312 | 1725 | |
7e071c79 | 1726 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1727 | if (!ret) |
1728 | return NET_RX_DROP; | |
fc957275 | 1729 | |
edbf12ba ML |
1730 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1731 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1732 | */ | |
fe8bc396 | 1733 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1734 | return NET_RX_DROP; |
1735 | ||
d69909d2 SE |
1736 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1737 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1738 | skb->len + ETH_HLEN); |
1739 | ||
7351a482 SW |
1740 | ogm_offset = 0; |
1741 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1742 | |
1743 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1744 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1745 | ogm_packet->tvlv_len)) { | |
1746 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1747 | |
7351a482 SW |
1748 | ogm_offset += BATADV_OGM_HLEN; |
1749 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1750 | |
7351a482 SW |
1751 | packet_pos = skb->data + ogm_offset; |
1752 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1753 | } |
c3e29312 ML |
1754 | |
1755 | kfree_skb(skb); | |
1756 | return NET_RX_SUCCESS; | |
fc957275 | 1757 | } |
1c280471 | 1758 | |
1b371d13 SW |
1759 | /** |
1760 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1761 | * @orig_node: the orig_node for which the neighbors are printed |
1762 | * @if_outgoing: outgoing interface for these entries | |
1763 | * @seq: debugfs table seq_file struct | |
1764 | * | |
1765 | * Must be called while holding an rcu lock. | |
1766 | */ | |
1767 | static void | |
1768 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1769 | struct batadv_hard_iface *if_outgoing, | |
1770 | struct seq_file *seq) | |
1771 | { | |
1772 | struct batadv_neigh_node *neigh_node; | |
1773 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1774 | ||
1775 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1776 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1777 | if (!n_ifinfo) | |
1778 | continue; | |
1779 | ||
1780 | seq_printf(seq, " %pM (%3i)", | |
1781 | neigh_node->addr, | |
1782 | n_ifinfo->bat_iv.tq_avg); | |
1783 | ||
1784 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
1785 | } | |
1786 | } | |
1787 | ||
737a2a22 AQ |
1788 | /** |
1789 | * batadv_iv_ogm_orig_print - print the originator table | |
1790 | * @bat_priv: the bat priv with all the soft interface information | |
1791 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1792 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1793 | */ |
1794 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1795 | struct seq_file *seq, |
1796 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1797 | { |
89652331 | 1798 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1799 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1800 | int last_seen_msecs, last_seen_secs; | |
1801 | struct batadv_orig_node *orig_node; | |
89652331 | 1802 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1803 | unsigned long last_seen_jiffies; |
1804 | struct hlist_head *head; | |
1805 | int batman_count = 0; | |
1806 | uint32_t i; | |
1807 | ||
1808 | seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", | |
1809 | "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, | |
1810 | "Nexthop", "outgoingIF", "Potential nexthops"); | |
1811 | ||
1812 | for (i = 0; i < hash->size; i++) { | |
1813 | head = &hash->table[i]; | |
1814 | ||
1815 | rcu_read_lock(); | |
1816 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1817 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1818 | if_outgoing); |
737a2a22 AQ |
1819 | if (!neigh_node) |
1820 | continue; | |
1821 | ||
89652331 | 1822 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1823 | if_outgoing); |
89652331 SW |
1824 | if (!n_ifinfo) |
1825 | goto next; | |
1826 | ||
1827 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1828 | goto next; |
1829 | ||
1830 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1831 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1832 | last_seen_secs = last_seen_msecs / 1000; | |
1833 | last_seen_msecs = last_seen_msecs % 1000; | |
1834 | ||
1835 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1836 | orig_node->orig, last_seen_secs, | |
89652331 | 1837 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1838 | neigh_node->addr, |
1839 | neigh_node->if_incoming->net_dev->name); | |
1840 | ||
cb1c92ec SW |
1841 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1842 | seq); | |
737a2a22 AQ |
1843 | seq_puts(seq, "\n"); |
1844 | batman_count++; | |
1845 | ||
1846 | next: | |
1847 | batadv_neigh_node_free_ref(neigh_node); | |
89652331 SW |
1848 | if (n_ifinfo) |
1849 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
737a2a22 AQ |
1850 | } |
1851 | rcu_read_unlock(); | |
1852 | } | |
1853 | ||
1854 | if (batman_count == 0) | |
1855 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1856 | } | |
1857 | ||
a3285a8f AQ |
1858 | /** |
1859 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
1860 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 1861 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 1862 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1863 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f AQ |
1864 | * |
1865 | * Returns a value less, equal to or greater than 0 if the metric via neigh1 is | |
1866 | * lower, the same as or higher than the metric via neigh2 | |
1867 | */ | |
1868 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
1869 | struct batadv_hard_iface *if_outgoing1, |
1870 | struct batadv_neigh_node *neigh2, | |
1871 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 1872 | { |
89652331 | 1873 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
a3285a8f | 1874 | uint8_t tq1, tq2; |
89652331 SW |
1875 | int diff; |
1876 | ||
1877 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
1878 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 1879 | |
89652331 SW |
1880 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
1881 | diff = 0; | |
1882 | goto out; | |
1883 | } | |
a3285a8f | 1884 | |
89652331 SW |
1885 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
1886 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1887 | diff = tq1 - tq2; | |
1888 | ||
1889 | out: | |
1890 | if (neigh1_ifinfo) | |
1891 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
1892 | if (neigh2_ifinfo) | |
1893 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
1894 | ||
1895 | return diff; | |
a3285a8f AQ |
1896 | } |
1897 | ||
c43c981e AQ |
1898 | /** |
1899 | * batadv_iv_ogm_neigh_is_eob - check if neigh1 is equally good or better than | |
1900 | * neigh2 from the metric prospective | |
1901 | * @neigh1: the first neighbor object of the comparison | |
95298a91 | 1902 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 1903 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1904 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 1905 | * |
89652331 SW |
1906 | * Returns true if the metric via neigh1 is equally good or better than |
1907 | * the metric via neigh2, false otherwise. | |
c43c981e | 1908 | */ |
89652331 SW |
1909 | static bool |
1910 | batadv_iv_ogm_neigh_is_eob(struct batadv_neigh_node *neigh1, | |
1911 | struct batadv_hard_iface *if_outgoing1, | |
1912 | struct batadv_neigh_node *neigh2, | |
1913 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 1914 | { |
89652331 SW |
1915 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
1916 | uint8_t tq1, tq2; | |
1917 | bool ret; | |
c43c981e | 1918 | |
89652331 SW |
1919 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
1920 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
1921 | ||
1922 | /* we can't say that the metric is better */ | |
1923 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
1924 | ret = false; | |
1925 | goto out; | |
1926 | } | |
1927 | ||
1928 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
1929 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1930 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
1931 | ||
1932 | out: | |
1933 | if (neigh1_ifinfo) | |
1934 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
1935 | if (neigh2_ifinfo) | |
1936 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
1937 | ||
1938 | return ret; | |
c43c981e AQ |
1939 | } |
1940 | ||
56303d34 | 1941 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 1942 | .name = "BATMAN_IV", |
fe8bc396 SE |
1943 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
1944 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
1945 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
1946 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
1947 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
1948 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
a3285a8f | 1949 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
c43c981e | 1950 | .bat_neigh_is_equiv_or_better = batadv_iv_ogm_neigh_is_eob, |
737a2a22 | 1951 | .bat_orig_print = batadv_iv_ogm_orig_print, |
d0015fdd AQ |
1952 | .bat_orig_free = batadv_iv_ogm_orig_free, |
1953 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, | |
1954 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, | |
1c280471 ML |
1955 | }; |
1956 | ||
81c524f7 | 1957 | int __init batadv_iv_init(void) |
1c280471 | 1958 | { |
c3e29312 ML |
1959 | int ret; |
1960 | ||
1961 | /* batman originator packet */ | |
acd34afa SE |
1962 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
1963 | batadv_iv_ogm_receive); | |
c3e29312 ML |
1964 | if (ret < 0) |
1965 | goto out; | |
1966 | ||
fe8bc396 | 1967 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
1968 | if (ret < 0) |
1969 | goto handler_unregister; | |
1970 | ||
1971 | goto out; | |
1972 | ||
1973 | handler_unregister: | |
acd34afa | 1974 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
1975 | out: |
1976 | return ret; | |
1c280471 | 1977 | } |