Commit | Line | Data |
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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 | ||
1e2c2a4f | 18 | #include "bat_algo.h" |
fc957275 | 19 | #include "main.h" |
1e2c2a4f SE |
20 | |
21 | #include <linux/atomic.h> | |
22 | #include <linux/bitmap.h> | |
23 | #include <linux/bitops.h> | |
24 | #include <linux/bug.h> | |
25 | #include <linux/byteorder/generic.h> | |
26 | #include <linux/cache.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/netdevice.h> | |
35 | #include <linux/pkt_sched.h> | |
36 | #include <linux/printk.h> | |
37 | #include <linux/random.h> | |
38 | #include <linux/rculist.h> | |
39 | #include <linux/rcupdate.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/stddef.h> | |
45 | #include <linux/string.h> | |
46 | #include <linux/types.h> | |
47 | #include <linux/workqueue.h> | |
48 | ||
49 | #include "bitarray.h" | |
50 | #include "hard-interface.h" | |
51 | #include "hash.h" | |
52 | #include "network-coding.h" | |
fc957275 | 53 | #include "originator.h" |
1e2c2a4f | 54 | #include "packet.h" |
fc957275 | 55 | #include "routing.h" |
fc957275 | 56 | #include "send.h" |
1e2c2a4f | 57 | #include "translation-table.h" |
fc957275 | 58 | |
791c2a2d | 59 | /** |
95298a91 | 60 | * enum batadv_dup_status - duplicate status |
9f52ee19 | 61 | * @BATADV_NO_DUP: the packet is no duplicate |
791c2a2d AQ |
62 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
63 | * neighbor) | |
64 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
65 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
66 | */ | |
67 | enum batadv_dup_status { | |
68 | BATADV_NO_DUP = 0, | |
69 | BATADV_ORIG_DUP, | |
70 | BATADV_NEIGH_DUP, | |
71 | BATADV_PROTECTED, | |
72 | }; | |
73 | ||
24a5deeb AQ |
74 | /** |
75 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
76 | * @lq_recv: pointer to the ring buffer | |
77 | * @lq_index: index to store the value at | |
78 | * @value: value to store in the ring buffer | |
79 | */ | |
6b5e971a | 80 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
81 | { |
82 | lq_recv[*lq_index] = value; | |
83 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
84 | } | |
85 | ||
86 | /** | |
d491dbb6 | 87 | * batadv_ring_buffer_avg - compute the average of all non-zero values stored |
24a5deeb AQ |
88 | * in the given ring buffer |
89 | * @lq_recv: pointer to the ring buffer | |
90 | * | |
91 | * Returns computed average value. | |
92 | */ | |
6b5e971a | 93 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 94 | { |
6b5e971a SE |
95 | const u8 *ptr; |
96 | u16 count = 0; | |
97 | u16 i = 0; | |
98 | u16 sum = 0; | |
24a5deeb AQ |
99 | |
100 | ptr = lq_recv; | |
101 | ||
102 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
103 | if (*ptr != 0) { | |
104 | count++; | |
105 | sum += *ptr; | |
106 | } | |
107 | ||
108 | i++; | |
109 | ptr++; | |
110 | } | |
111 | ||
112 | if (count == 0) | |
113 | return 0; | |
114 | ||
6b5e971a | 115 | return (u8)(sum / count); |
24a5deeb | 116 | } |
d98cae64 | 117 | |
d0015fdd AQ |
118 | /** |
119 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
120 | * orig_node | |
121 | * @orig_node: the orig_node for which the resources have to be free'd | |
122 | */ | |
123 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
124 | { | |
125 | kfree(orig_node->bat_iv.bcast_own); | |
126 | kfree(orig_node->bat_iv.bcast_own_sum); | |
127 | } | |
128 | ||
129 | /** | |
130 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
131 | * include the new hard-interface | |
132 | * @orig_node: the orig_node that has to be changed | |
133 | * @max_if_num: the current amount of interfaces | |
134 | * | |
135 | * Returns 0 on success, a negative error code otherwise. | |
136 | */ | |
137 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
138 | int max_if_num) | |
139 | { | |
140 | void *data_ptr; | |
0185dda6 | 141 | size_t old_size; |
d0015fdd AQ |
142 | int ret = -ENOMEM; |
143 | ||
144 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
145 | ||
d0015fdd | 146 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
147 | data_ptr = kmalloc_array(max_if_num, |
148 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
149 | GFP_ATOMIC); | |
d0015fdd AQ |
150 | if (!data_ptr) |
151 | goto unlock; | |
152 | ||
153 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
154 | kfree(orig_node->bat_iv.bcast_own); | |
155 | orig_node->bat_iv.bcast_own = data_ptr; | |
156 | ||
6b5e971a | 157 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
d0015fdd AQ |
158 | if (!data_ptr) { |
159 | kfree(orig_node->bat_iv.bcast_own); | |
160 | goto unlock; | |
161 | } | |
162 | ||
163 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 164 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
165 | kfree(orig_node->bat_iv.bcast_own_sum); |
166 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
167 | ||
168 | ret = 0; | |
169 | ||
170 | unlock: | |
171 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
172 | ||
173 | return ret; | |
174 | } | |
175 | ||
176 | /** | |
177 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
178 | * exclude the removed interface | |
179 | * @orig_node: the orig_node that has to be changed | |
180 | * @max_if_num: the current amount of interfaces | |
181 | * @del_if_num: the index of the interface being removed | |
182 | * | |
183 | * Returns 0 on success, a negative error code otherwise. | |
184 | */ | |
185 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
186 | int max_if_num, int del_if_num) | |
187 | { | |
13bbdd37 SE |
188 | int ret = -ENOMEM; |
189 | size_t chunk_size, if_offset; | |
d0015fdd AQ |
190 | void *data_ptr = NULL; |
191 | ||
192 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
193 | ||
194 | /* last interface was removed */ | |
195 | if (max_if_num == 0) | |
196 | goto free_bcast_own; | |
197 | ||
198 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 199 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd AQ |
200 | if (!data_ptr) |
201 | goto unlock; | |
202 | ||
203 | /* copy first part */ | |
204 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); | |
205 | ||
206 | /* copy second part */ | |
13bbdd37 | 207 | if_offset = (del_if_num + 1) * chunk_size; |
d0015fdd | 208 | memcpy((char *)data_ptr + del_if_num * chunk_size, |
13bbdd37 | 209 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, |
d0015fdd AQ |
210 | (max_if_num - del_if_num) * chunk_size); |
211 | ||
212 | free_bcast_own: | |
213 | kfree(orig_node->bat_iv.bcast_own); | |
214 | orig_node->bat_iv.bcast_own = data_ptr; | |
215 | ||
216 | if (max_if_num == 0) | |
217 | goto free_own_sum; | |
218 | ||
6b5e971a | 219 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
d0015fdd AQ |
220 | if (!data_ptr) { |
221 | kfree(orig_node->bat_iv.bcast_own); | |
222 | goto unlock; | |
223 | } | |
224 | ||
225 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 226 | del_if_num * sizeof(u8)); |
d0015fdd | 227 | |
6b5e971a SE |
228 | if_offset = (del_if_num + 1) * sizeof(u8); |
229 | memcpy((char *)data_ptr + del_if_num * sizeof(u8), | |
d0015fdd | 230 | orig_node->bat_iv.bcast_own_sum + if_offset, |
6b5e971a | 231 | (max_if_num - del_if_num) * sizeof(u8)); |
d0015fdd AQ |
232 | |
233 | free_own_sum: | |
234 | kfree(orig_node->bat_iv.bcast_own_sum); | |
235 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
236 | ||
237 | ret = 0; | |
238 | unlock: | |
239 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
240 | ||
241 | return ret; | |
242 | } | |
243 | ||
bbad0a5e AQ |
244 | /** |
245 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
246 | * @bat_priv: the bat priv with all the soft interface information | |
247 | * @addr: mac address of the originator | |
248 | * | |
249 | * Returns the originator object corresponding to the passed mac address or NULL | |
250 | * on failure. | |
251 | * If the object does not exists it is created an initialised. | |
252 | */ | |
253 | static struct batadv_orig_node * | |
6b5e971a | 254 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
255 | { |
256 | struct batadv_orig_node *orig_node; | |
257 | int size, hash_added; | |
258 | ||
259 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
260 | if (orig_node) | |
261 | return orig_node; | |
262 | ||
263 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
264 | if (!orig_node) | |
265 | return NULL; | |
266 | ||
267 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
268 | ||
269 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
270 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
271 | if (!orig_node->bat_iv.bcast_own) | |
272 | goto free_orig_node; | |
273 | ||
6b5e971a | 274 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
275 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
276 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 277 | goto free_orig_node; |
bbad0a5e AQ |
278 | |
279 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
280 | batadv_choose_orig, orig_node, | |
281 | &orig_node->hash_entry); | |
282 | if (hash_added != 0) | |
a5a5cb8c | 283 | goto free_orig_node; |
bbad0a5e AQ |
284 | |
285 | return orig_node; | |
286 | ||
bbad0a5e | 287 | free_orig_node: |
b2262df7 SW |
288 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
289 | batadv_orig_node_free_ref(orig_node); | |
bbad0a5e AQ |
290 | batadv_orig_node_free_ref(orig_node); |
291 | ||
292 | return NULL; | |
293 | } | |
294 | ||
56303d34 SE |
295 | static struct batadv_neigh_node * |
296 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 297 | const u8 *neigh_addr, |
56303d34 | 298 | struct batadv_orig_node *orig_node, |
863dd7a8 | 299 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 300 | { |
741aa06b | 301 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 302 | |
3f32f8a6 | 303 | neigh_node = batadv_neigh_node_new(orig_node, hard_iface, neigh_addr); |
7ae8b285 ML |
304 | if (!neigh_node) |
305 | goto out; | |
306 | ||
89652331 | 307 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 308 | |
7ae8b285 ML |
309 | out: |
310 | return neigh_node; | |
311 | } | |
312 | ||
56303d34 | 313 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 314 | { |
96412690 | 315 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 316 | unsigned char *ogm_buff; |
6b5e971a | 317 | u32 random_seqno; |
d7d32ec0 ML |
318 | |
319 | /* randomize initial seqno to avoid collision */ | |
320 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 321 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 322 | |
14511519 ML |
323 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
324 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
325 | if (!ogm_buff) | |
42d9f2cb | 326 | return -ENOMEM; |
77af7575 | 327 | |
14511519 ML |
328 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
329 | ||
330 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
331 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
332 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
333 | batadv_ogm_packet->ttl = 2; | |
96412690 | 334 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 335 | batadv_ogm_packet->reserved = 0; |
96412690 | 336 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 337 | |
42d9f2cb | 338 | return 0; |
d0b9fd89 ML |
339 | } |
340 | ||
56303d34 | 341 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 342 | { |
14511519 ML |
343 | kfree(hard_iface->bat_iv.ogm_buff); |
344 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
345 | } |
346 | ||
56303d34 | 347 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 348 | { |
96412690 | 349 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 350 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 351 | |
14511519 | 352 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
353 | ether_addr_copy(batadv_ogm_packet->orig, |
354 | hard_iface->net_dev->dev_addr); | |
355 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
356 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
357 | } |
358 | ||
56303d34 SE |
359 | static void |
360 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 361 | { |
96412690 | 362 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 363 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 364 | |
14511519 | 365 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 366 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
367 | } |
368 | ||
b9dacc52 | 369 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 370 | static unsigned long |
56303d34 | 371 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 372 | { |
42d0b044 SE |
373 | unsigned int msecs; |
374 | ||
375 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 376 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
377 | |
378 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
379 | } |
380 | ||
381 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 382 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 383 | { |
e76e4320 | 384 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
385 | } |
386 | ||
387 | /* apply hop penalty for a normal link */ | |
6b5e971a | 388 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
389 | { |
390 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
391 | int new_tq; |
392 | ||
393 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
394 | new_tq /= BATADV_TQ_MAX_VALUE; | |
395 | ||
396 | return new_tq; | |
b9dacc52 ML |
397 | } |
398 | ||
fc957275 | 399 | /* is there another aggregated packet here? */ |
9fd9b19e MP |
400 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
401 | __be16 tvlv_len) | |
fc957275 | 402 | { |
08c36d3e SE |
403 | int next_buff_pos = 0; |
404 | ||
7e071c79 | 405 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 406 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
407 | |
408 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 409 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
410 | } |
411 | ||
b9dacc52 | 412 | /* send a batman ogm to a given interface */ |
56303d34 SE |
413 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
414 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 415 | { |
56303d34 | 416 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 417 | const char *fwd_str; |
6b5e971a SE |
418 | u8 packet_num; |
419 | s16 buff_pos; | |
96412690 | 420 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 421 | struct sk_buff *skb; |
6b5e971a | 422 | u8 *packet_pos; |
b9dacc52 | 423 | |
e9a4f295 | 424 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
425 | return; |
426 | ||
427 | packet_num = 0; | |
428 | buff_pos = 0; | |
c67893d1 SE |
429 | packet_pos = forw_packet->skb->data; |
430 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
431 | |
432 | /* adjust all flags and log packets */ | |
fe8bc396 | 433 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 434 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 435 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
436 | * ordinary base packet |
437 | */ | |
8de47de5 SE |
438 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
439 | forw_packet->if_incoming == hard_iface) | |
96412690 | 440 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 441 | else |
96412690 | 442 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 443 | |
c67893d1 SE |
444 | if (packet_num > 0 || !forw_packet->own) |
445 | fwd_str = "Forwarding"; | |
446 | else | |
447 | fwd_str = "Sending own"; | |
448 | ||
39c75a51 | 449 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 450 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 451 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
452 | batadv_ogm_packet->orig, |
453 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 454 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 455 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 456 | "on" : "off"), |
e1bf0c14 | 457 | hard_iface->net_dev->name, |
1eda58bf | 458 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 459 | |
7e071c79 | 460 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 461 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 462 | packet_num++; |
c67893d1 SE |
463 | packet_pos = forw_packet->skb->data + buff_pos; |
464 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
465 | } |
466 | ||
467 | /* create clone because function is called more than once */ | |
468 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 469 | if (skb) { |
d69909d2 SE |
470 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
471 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 472 | skb->len + ETH_HLEN); |
3193e8fd | 473 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
f8214865 | 474 | } |
b9dacc52 ML |
475 | } |
476 | ||
477 | /* send a batman ogm packet */ | |
56303d34 | 478 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 479 | { |
b9dacc52 | 480 | struct net_device *soft_iface; |
56303d34 SE |
481 | struct batadv_priv *bat_priv; |
482 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
483 | |
484 | if (!forw_packet->if_incoming) { | |
86ceb360 | 485 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
486 | goto out; |
487 | } | |
488 | ||
489 | soft_iface = forw_packet->if_incoming->soft_iface; | |
490 | bat_priv = netdev_priv(soft_iface); | |
491 | ||
ef0a937f | 492 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
493 | goto out; |
494 | ||
ef0a937f | 495 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
496 | goto out; |
497 | ||
ef0a937f | 498 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 499 | goto out; |
b9dacc52 | 500 | |
ef0a937f SW |
501 | primary_if = batadv_primary_if_get_selected(bat_priv); |
502 | if (!primary_if) | |
503 | goto out; | |
b9dacc52 | 504 | |
ef0a937f SW |
505 | /* only for one specific outgoing interface */ |
506 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
507 | |
508 | out: | |
509 | if (primary_if) | |
e5d89254 | 510 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
511 | } |
512 | ||
ef0a937f SW |
513 | /** |
514 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
515 | * existing forward packet | |
516 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
517 | * @bat_priv: the bat priv with all the soft interface information | |
518 | * @packet_len: (total) length of the OGM | |
519 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 520 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
521 | * @if_incoming: interface where the packet was received |
522 | * @if_outgoing: interface for which the retransmission should be considered | |
523 | * @forw_packet: the forwarded packet which should be checked | |
524 | * | |
525 | * Returns true if new_packet can be aggregated with forw_packet | |
526 | */ | |
fe8bc396 | 527 | static bool |
96412690 | 528 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 529 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
530 | int packet_len, unsigned long send_time, |
531 | bool directlink, | |
56303d34 | 532 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 533 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 534 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 535 | { |
96412690 | 536 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 537 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 538 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 539 | bool res = false; |
42d0b044 | 540 | unsigned long aggregation_end_time; |
b9dacc52 | 541 | |
96412690 | 542 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
543 | aggregation_end_time = send_time; |
544 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 545 | |
9cfc7bd6 | 546 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
547 | * if: |
548 | * | |
549 | * - the send time is within our MAX_AGGREGATION_MS time | |
550 | * - the resulting packet wont be bigger than | |
551 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 552 | * otherwise aggregation is not possible |
b9dacc52 | 553 | */ |
8f34b388 MP |
554 | if (!time_before(send_time, forw_packet->send_time) || |
555 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
556 | return false; | |
557 | ||
558 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
559 | return false; | |
560 | ||
561 | /* packet is not leaving on the same interface. */ | |
562 | if (forw_packet->if_outgoing != if_outgoing) | |
563 | return false; | |
564 | ||
565 | /* check aggregation compatibility | |
566 | * -> direct link packets are broadcasted on | |
567 | * their interface only | |
568 | * -> aggregate packet if the current packet is | |
569 | * a "global" packet as well as the base | |
570 | * packet | |
571 | */ | |
572 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
573 | if (!primary_if) | |
574 | return false; | |
ef0a937f | 575 | |
8f34b388 MP |
576 | /* packets without direct link flag and high TTL |
577 | * are flooded through the net | |
578 | */ | |
579 | if (!directlink && | |
580 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
581 | batadv_ogm_packet->ttl != 1 && | |
582 | ||
583 | /* own packets originating non-primary | |
584 | * interfaces leave only that interface | |
585 | */ | |
586 | (!forw_packet->own || | |
587 | forw_packet->if_incoming == primary_if)) { | |
588 | res = true; | |
589 | goto out; | |
590 | } | |
b9dacc52 | 591 | |
8f34b388 MP |
592 | /* if the incoming packet is sent via this one |
593 | * interface only - we still can aggregate | |
594 | */ | |
595 | if (directlink && | |
596 | new_bat_ogm_packet->ttl == 1 && | |
597 | forw_packet->if_incoming == if_incoming && | |
598 | ||
599 | /* packets from direct neighbors or | |
600 | * own secondary interface packets | |
601 | * (= secondary interface packets in general) | |
602 | */ | |
603 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
604 | (forw_packet->own && | |
605 | forw_packet->if_incoming != primary_if))) { | |
606 | res = true; | |
607 | goto out; | |
b9dacc52 ML |
608 | } |
609 | ||
610 | out: | |
611 | if (primary_if) | |
e5d89254 | 612 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
613 | return res; |
614 | } | |
615 | ||
1b371d13 SW |
616 | /** |
617 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
618 | * packet to it. |
619 | * @packet_buff: pointer to the OGM | |
620 | * @packet_len: (total) length of the OGM | |
621 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
622 | * @direct_link: whether this OGM has direct link status | |
623 | * @if_incoming: interface where the packet was received | |
624 | * @if_outgoing: interface for which the retransmission should be considered | |
625 | * @own_packet: true if it is a self-generated ogm | |
626 | */ | |
fe8bc396 SE |
627 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
628 | int packet_len, unsigned long send_time, | |
629 | bool direct_link, | |
56303d34 | 630 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 631 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 632 | int own_packet) |
b9dacc52 | 633 | { |
56303d34 SE |
634 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
635 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 636 | unsigned char *skb_buff; |
42d0b044 | 637 | unsigned int skb_size; |
b9dacc52 ML |
638 | |
639 | if (!atomic_inc_not_zero(&if_incoming->refcount)) | |
640 | return; | |
641 | ||
ef0a937f SW |
642 | if (!atomic_inc_not_zero(&if_outgoing->refcount)) |
643 | goto out_free_incoming; | |
644 | ||
b9dacc52 ML |
645 | /* own packet should always be scheduled */ |
646 | if (!own_packet) { | |
3e34819e | 647 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 648 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 649 | "batman packet queue full\n"); |
940d156f | 650 | goto out_free_outgoing; |
b9dacc52 ML |
651 | } |
652 | } | |
653 | ||
654 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
655 | if (!forw_packet_aggr) |
656 | goto out_nomem; | |
b9dacc52 | 657 | |
940d156f MP |
658 | if (atomic_read(&bat_priv->aggregated_ogms) && |
659 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 660 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 661 | else |
5b246574 SE |
662 | skb_size = packet_len; |
663 | ||
41ab6c48 | 664 | skb_size += ETH_HLEN; |
b9dacc52 | 665 | |
41ab6c48 | 666 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
667 | if (!forw_packet_aggr->skb) |
668 | goto out_free_forw_packet; | |
c54f38c9 | 669 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 670 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 671 | |
b9dacc52 ML |
672 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
673 | forw_packet_aggr->packet_len = packet_len; | |
674 | memcpy(skb_buff, packet_buff, packet_len); | |
675 | ||
676 | forw_packet_aggr->own = own_packet; | |
677 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 678 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 679 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 680 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
681 | forw_packet_aggr->send_time = send_time; |
682 | ||
683 | /* save packet direct link flag status */ | |
684 | if (direct_link) | |
685 | forw_packet_aggr->direct_link_flags |= 1; | |
686 | ||
687 | /* add new packet to packet list */ | |
688 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
689 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
690 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
691 | ||
692 | /* start timer for this packet */ | |
693 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 694 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 695 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
696 | &forw_packet_aggr->delayed_work, |
697 | send_time - jiffies); | |
698 | ||
699 | return; | |
940d156f MP |
700 | out_free_forw_packet: |
701 | kfree(forw_packet_aggr); | |
702 | out_nomem: | |
703 | if (!own_packet) | |
704 | atomic_inc(&bat_priv->batman_queue_left); | |
705 | out_free_outgoing: | |
ef0a937f SW |
706 | batadv_hardif_free_ref(if_outgoing); |
707 | out_free_incoming: | |
e5d89254 | 708 | batadv_hardif_free_ref(if_incoming); |
b9dacc52 ML |
709 | } |
710 | ||
711 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 712 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
713 | const unsigned char *packet_buff, |
714 | int packet_len, bool direct_link) | |
b9dacc52 ML |
715 | { |
716 | unsigned char *skb_buff; | |
8de47de5 | 717 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
718 | |
719 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
720 | memcpy(skb_buff, packet_buff, packet_len); | |
721 | forw_packet_aggr->packet_len += packet_len; | |
722 | forw_packet_aggr->num_packets++; | |
723 | ||
724 | /* save packet direct link flag status */ | |
8de47de5 SE |
725 | if (direct_link) { |
726 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
727 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
728 | } | |
b9dacc52 ML |
729 | } |
730 | ||
ef0a937f SW |
731 | /** |
732 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
733 | * @bat_priv: the bat priv with all the soft interface information | |
734 | * @packet_buff: pointer to the OGM | |
735 | * @packet_len: (total) length of the OGM | |
736 | * @if_incoming: interface where the packet was received | |
737 | * @if_outgoing: interface for which the retransmission should be considered | |
738 | * @own_packet: true if it is a self-generated ogm | |
739 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
740 | */ | |
56303d34 | 741 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
742 | unsigned char *packet_buff, |
743 | int packet_len, | |
56303d34 | 744 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 745 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 746 | int own_packet, unsigned long send_time) |
b9dacc52 | 747 | { |
9cfc7bd6 | 748 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
749 | * _pos -> pointer to the position in the queue |
750 | */ | |
56303d34 SE |
751 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
752 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 753 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 754 | bool direct_link; |
42d0b044 | 755 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 756 | |
96412690 | 757 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 758 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 759 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
760 | |
761 | /* find position for the packet in the forward queue */ | |
762 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
763 | /* own packets are not to be aggregated */ | |
56489151 | 764 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 765 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 766 | &bat_priv->forw_bat_list, list) { |
96412690 | 767 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
768 | bat_priv, packet_len, |
769 | send_time, direct_link, | |
770 | if_incoming, | |
ef0a937f | 771 | if_outgoing, |
fe8bc396 | 772 | forw_packet_pos)) { |
b9dacc52 ML |
773 | forw_packet_aggr = forw_packet_pos; |
774 | break; | |
775 | } | |
776 | } | |
777 | } | |
778 | ||
779 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
780 | * suitable aggregation packet found |
781 | */ | |
b9dacc52 ML |
782 | if (!forw_packet_aggr) { |
783 | /* the following section can run without the lock */ | |
784 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
785 | ||
9cfc7bd6 | 786 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
787 | * we hold it back for a while, so that it might be aggregated |
788 | * later on | |
789 | */ | |
42d0b044 SE |
790 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
791 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 792 | |
fe8bc396 SE |
793 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
794 | send_time, direct_link, | |
ef0a937f SW |
795 | if_incoming, if_outgoing, |
796 | own_packet); | |
b9dacc52 | 797 | } else { |
fe8bc396 SE |
798 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
799 | packet_len, direct_link); | |
b9dacc52 ML |
800 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
801 | } | |
802 | } | |
803 | ||
56303d34 | 804 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 805 | const struct ethhdr *ethhdr, |
96412690 | 806 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
807 | bool is_single_hop_neigh, |
808 | bool is_from_best_next_hop, | |
ef0a937f SW |
809 | struct batadv_hard_iface *if_incoming, |
810 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 811 | { |
56303d34 | 812 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 813 | u16 tvlv_len; |
b9dacc52 | 814 | |
a40d9b07 | 815 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 816 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
817 | return; |
818 | } | |
819 | ||
13b2541b ML |
820 | if (!is_from_best_next_hop) { |
821 | /* Mark the forwarded packet when it is not coming from our | |
822 | * best next hop. We still need to forward the packet for our | |
823 | * neighbor link quality detection to work in case the packet | |
824 | * originated from a single hop neighbor. Otherwise we can | |
825 | * simply drop the ogm. | |
826 | */ | |
827 | if (is_single_hop_neigh) | |
96412690 | 828 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
829 | else |
830 | return; | |
831 | } | |
b9dacc52 | 832 | |
ef261577 | 833 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 834 | |
a40d9b07 | 835 | batadv_ogm_packet->ttl--; |
8fdd0153 | 836 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 837 | |
b9dacc52 | 838 | /* apply hop penalty */ |
96412690 | 839 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 840 | bat_priv); |
b9dacc52 | 841 | |
39c75a51 | 842 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 843 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 844 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 845 | |
75cd33f8 | 846 | if (is_single_hop_neigh) |
96412690 | 847 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 848 | else |
96412690 | 849 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 850 | |
96412690 | 851 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 852 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
853 | if_incoming, if_outgoing, 0, |
854 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
855 | } |
856 | ||
d9896617 AQ |
857 | /** |
858 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
859 | * the given interface | |
860 | * @hard_iface: the interface for which the windows have to be shifted | |
861 | */ | |
862 | static void | |
863 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
864 | { | |
865 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
866 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
867 | struct hlist_head *head; | |
868 | struct batadv_orig_node *orig_node; | |
869 | unsigned long *word; | |
6b5e971a | 870 | u32 i; |
d9896617 | 871 | size_t word_index; |
6b5e971a | 872 | u8 *w; |
bbad0a5e | 873 | int if_num; |
d9896617 AQ |
874 | |
875 | for (i = 0; i < hash->size; i++) { | |
876 | head = &hash->table[i]; | |
877 | ||
878 | rcu_read_lock(); | |
879 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 880 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 881 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 882 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
883 | |
884 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
885 | if_num = hard_iface->if_num; |
886 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 887 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 888 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
889 | } |
890 | rcu_read_unlock(); | |
891 | } | |
892 | } | |
893 | ||
56303d34 | 894 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 895 | { |
56303d34 | 896 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 897 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 898 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 899 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 900 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
901 | u32 seqno; |
902 | u16 tvlv_len = 0; | |
ef0a937f | 903 | unsigned long send_time; |
b9dacc52 | 904 | |
e5d89254 | 905 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 906 | |
e1bf0c14 ML |
907 | if (hard_iface == primary_if) { |
908 | /* tt changes have to be committed before the tvlv data is | |
909 | * appended as it may alter the tt tvlv container | |
910 | */ | |
911 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
912 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
913 | ogm_buff_len, | |
914 | BATADV_OGM_HLEN); | |
e1bf0c14 | 915 | } |
be9aa4c1 | 916 | |
14511519 | 917 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 918 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
919 | |
920 | /* change sequence number to network order */ | |
6b5e971a | 921 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 922 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 923 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 924 | |
d9896617 | 925 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 926 | |
ef0a937f SW |
927 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
928 | ||
929 | if (hard_iface != primary_if) { | |
930 | /* OGMs from secondary interfaces are only scheduled on their | |
931 | * respective interfaces. | |
932 | */ | |
933 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
934 | hard_iface, hard_iface, 1, send_time); | |
935 | goto out; | |
936 | } | |
937 | ||
938 | /* OGMs from primary interfaces are scheduled on all | |
939 | * interfaces. | |
940 | */ | |
941 | rcu_read_lock(); | |
942 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
943 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 944 | continue; |
ef0a937f SW |
945 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
946 | *ogm_buff_len, hard_iface, | |
947 | tmp_hard_iface, 1, send_time); | |
948 | } | |
949 | rcu_read_unlock(); | |
950 | ||
951 | out: | |
b9dacc52 | 952 | if (primary_if) |
e5d89254 | 953 | batadv_hardif_free_ref(primary_if); |
b9dacc52 ML |
954 | } |
955 | ||
89652331 SW |
956 | /** |
957 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
958 | * originator | |
959 | * @bat_priv: the bat priv with all the soft interface information | |
960 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 961 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
962 | * @ethhdr: Ethernet header of the OGM |
963 | * @batadv_ogm_packet: the ogm packet | |
964 | * @if_incoming: interface where the packet was received | |
965 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
966 | * @dup_status: the duplicate status of this ogm packet. |
967 | */ | |
fe8bc396 | 968 | static void |
56303d34 SE |
969 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
970 | struct batadv_orig_node *orig_node, | |
7351a482 | 971 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 972 | const struct ethhdr *ethhdr, |
96412690 | 973 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 974 | struct batadv_hard_iface *if_incoming, |
89652331 | 975 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 976 | enum batadv_dup_status dup_status) |
fc957275 | 977 | { |
89652331 SW |
978 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
979 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
980 | struct batadv_neigh_node *neigh_node = NULL; |
981 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
982 | struct batadv_neigh_node *router = NULL; |
983 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 984 | int if_num; |
6b5e971a SE |
985 | u8 sum_orig, sum_neigh; |
986 | u8 *neigh_addr; | |
987 | u8 tq_avg; | |
fc957275 | 988 | |
39c75a51 | 989 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 990 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
991 | |
992 | rcu_read_lock(); | |
b67bfe0d | 993 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 994 | &orig_node->neigh_list, list) { |
1eda58bf SE |
995 | neigh_addr = tmp_neigh_node->addr; |
996 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
997 | tmp_neigh_node->if_incoming == if_incoming && | |
998 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { | |
38dc40ef | 999 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
7d211efc | 1000 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
1001 | neigh_node = tmp_neigh_node; |
1002 | continue; | |
1003 | } | |
1004 | ||
7c24bbbe | 1005 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1006 | continue; |
1007 | ||
89652331 SW |
1008 | /* only update the entry for this outgoing interface */ |
1009 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1010 | if_outgoing); | |
1011 | if (!neigh_ifinfo) | |
1012 | continue; | |
1013 | ||
1014 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1015 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1016 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1017 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1018 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1019 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1020 | ||
1021 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1022 | neigh_ifinfo = NULL; | |
fc957275 ML |
1023 | } |
1024 | ||
1025 | if (!neigh_node) { | |
56303d34 | 1026 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1027 | |
bbad0a5e | 1028 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1029 | if (!orig_tmp) |
1030 | goto unlock; | |
1031 | ||
fe8bc396 SE |
1032 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1033 | ethhdr->h_source, | |
863dd7a8 | 1034 | orig_node, orig_tmp); |
fc957275 | 1035 | |
7d211efc | 1036 | batadv_orig_node_free_ref(orig_tmp); |
fc957275 ML |
1037 | if (!neigh_node) |
1038 | goto unlock; | |
23badd6d | 1039 | } else { |
39c75a51 | 1040 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1041 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1042 | } |
fc957275 ML |
1043 | |
1044 | rcu_read_unlock(); | |
89652331 SW |
1045 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1046 | if (!neigh_ifinfo) | |
1047 | goto out; | |
fc957275 | 1048 | |
d7b2a97e | 1049 | neigh_node->last_seen = jiffies; |
fc957275 | 1050 | |
89652331 SW |
1051 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1052 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1053 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1054 | batadv_ogm_packet->tq); |
89652331 SW |
1055 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1056 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1057 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1058 | |
7c24bbbe | 1059 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1060 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1061 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1062 | } |
1063 | ||
fc957275 | 1064 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1065 | * to change |
1066 | */ | |
7351a482 | 1067 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1068 | if (router == neigh_node) |
e1bf0c14 | 1069 | goto out; |
fc957275 | 1070 | |
89652331 SW |
1071 | if (router) { |
1072 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1073 | if (!router_ifinfo) | |
1074 | goto out; | |
1075 | ||
1076 | /* if this neighbor does not offer a better TQ we won't | |
1077 | * consider it | |
1078 | */ | |
1079 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1080 | goto out; | |
1081 | } | |
fc957275 ML |
1082 | |
1083 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1084 | * won't consider it either |
1085 | */ | |
89652331 | 1086 | if (router_ifinfo && |
01b97a3e | 1087 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1088 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1089 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1090 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1091 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1092 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1093 | |
1094 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1095 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1096 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1097 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1098 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1099 | |
bbb1f90e | 1100 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1101 | goto out; |
fc957275 ML |
1102 | } |
1103 | ||
7351a482 | 1104 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1105 | goto out; |
1106 | ||
1107 | unlock: | |
1108 | rcu_read_unlock(); | |
1109 | out: | |
1110 | if (neigh_node) | |
7d211efc | 1111 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 | 1112 | if (router) |
7d211efc | 1113 | batadv_neigh_node_free_ref(router); |
89652331 SW |
1114 | if (neigh_ifinfo) |
1115 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1116 | if (router_ifinfo) | |
1117 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 ML |
1118 | } |
1119 | ||
89652331 SW |
1120 | /** |
1121 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1122 | * @orig_node: the orig node who originally emitted the ogm packet | |
1123 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1124 | * @batadv_ogm_packet: the ogm packet | |
1125 | * @if_incoming: interface where the packet was received | |
1126 | * @if_outgoing: interface for which the retransmission should be considered | |
1127 | * | |
1128 | * Returns 1 if the link can be considered bidirectional, 0 otherwise | |
1129 | */ | |
56303d34 SE |
1130 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1131 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 1132 | struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1133 | struct batadv_hard_iface *if_incoming, |
1134 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1135 | { |
56303d34 SE |
1136 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1137 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1138 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1139 | u8 total_count; |
1140 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1141 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
bbad0a5e | 1142 | int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; |
42d0b044 | 1143 | unsigned int combined_tq; |
c0398768 | 1144 | int tq_iface_penalty; |
fc957275 ML |
1145 | |
1146 | /* find corresponding one hop neighbor */ | |
1147 | rcu_read_lock(); | |
b67bfe0d | 1148 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1149 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1150 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1151 | orig_neigh_node->orig)) | |
fc957275 ML |
1152 | continue; |
1153 | ||
1154 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1155 | continue; | |
1156 | ||
1157 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) | |
1158 | continue; | |
1159 | ||
1160 | neigh_node = tmp_neigh_node; | |
1161 | break; | |
1162 | } | |
1163 | rcu_read_unlock(); | |
1164 | ||
1165 | if (!neigh_node) | |
fe8bc396 SE |
1166 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1167 | orig_neigh_node->orig, | |
1168 | orig_neigh_node, | |
863dd7a8 | 1169 | orig_neigh_node); |
fc957275 ML |
1170 | |
1171 | if (!neigh_node) | |
1172 | goto out; | |
1173 | ||
d7b2a97e | 1174 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1175 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1176 | neigh_node->last_seen = jiffies; |
fc957275 | 1177 | |
d7b2a97e | 1178 | orig_node->last_seen = jiffies; |
fc957275 ML |
1179 | |
1180 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1181 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1182 | if_num = if_incoming->if_num; | |
1183 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1184 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1185 | if (neigh_ifinfo) { | |
1186 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
1187 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
1188 | } else { | |
1189 | neigh_rq_count = 0; | |
1190 | } | |
bbad0a5e | 1191 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1192 | |
1193 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1194 | if (orig_eq_count > neigh_rq_count) |
1195 | total_count = neigh_rq_count; | |
1196 | else | |
1197 | total_count = orig_eq_count; | |
fc957275 | 1198 | |
9cfc7bd6 SE |
1199 | /* if we have too few packets (too less data) we set tq_own to zero |
1200 | * if we receive too few packets it is not considered bidirectional | |
1201 | */ | |
42d0b044 SE |
1202 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1203 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1204 | tq_own = 0; |
1205 | else | |
1206 | /* neigh_node->real_packet_count is never zero as we | |
1207 | * only purge old information when getting new | |
9cfc7bd6 SE |
1208 | * information |
1209 | */ | |
42d0b044 | 1210 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1211 | |
21a1236b | 1212 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1213 | * affect the nearly-symmetric links only a little, but |
1214 | * punishes asymmetric links more. This will give a value | |
1215 | * between 0 and TQ_MAX_VALUE | |
1216 | */ | |
42d0b044 SE |
1217 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1218 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1219 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1220 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1221 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1222 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1223 | inv_asym_penalty /= neigh_rq_max_cube; | |
1224 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1225 | ||
c0398768 SW |
1226 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1227 | * interfaces and other half duplex devices suffer from throughput | |
1228 | * drops as they can't send and receive at the same time. | |
1229 | */ | |
1230 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1231 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1232 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1233 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1234 | bat_priv); | |
1235 | ||
1236 | combined_tq = batadv_ogm_packet->tq * | |
1237 | tq_own * | |
1238 | tq_asym_penalty * | |
1239 | tq_iface_penalty; | |
1240 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1241 | BATADV_TQ_MAX_VALUE * | |
1242 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1243 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1244 | |
39c75a51 | 1245 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1246 | "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 | 1247 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1248 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1249 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1250 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1251 | |
1252 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1253 | * consider it bidirectional |
1254 | */ | |
96412690 | 1255 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
fc957275 ML |
1256 | ret = 1; |
1257 | ||
1258 | out: | |
1259 | if (neigh_node) | |
7d211efc | 1260 | batadv_neigh_node_free_ref(neigh_node); |
fc957275 ML |
1261 | return ret; |
1262 | } | |
1263 | ||
7c24bbbe SW |
1264 | /** |
1265 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1266 | * adjust the sequence number and find out whether it is a duplicate | |
1267 | * @ethhdr: ethernet header of the packet | |
1268 | * @batadv_ogm_packet: OGM packet to be considered | |
1269 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1270 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe SW |
1271 | * |
1272 | * Returns duplicate status as enum batadv_dup_status | |
fc957275 | 1273 | */ |
7c24bbbe | 1274 | static enum batadv_dup_status |
fe8bc396 | 1275 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1276 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1277 | const struct batadv_hard_iface *if_incoming, |
1278 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1279 | { |
56303d34 SE |
1280 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1281 | struct batadv_orig_node *orig_node; | |
7351a482 | 1282 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1283 | struct batadv_neigh_node *neigh_node; |
1284 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
7c24bbbe | 1285 | int is_dup; |
6b5e971a | 1286 | s32 seq_diff; |
fc957275 | 1287 | int need_update = 0; |
7c24bbbe SW |
1288 | int set_mark; |
1289 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1290 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1291 | u8 *neigh_addr; | |
1292 | u8 packet_count; | |
0538f759 | 1293 | unsigned long *bitmap; |
fc957275 | 1294 | |
bbad0a5e | 1295 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1296 | if (!orig_node) |
7c24bbbe | 1297 | return BATADV_NO_DUP; |
fc957275 | 1298 | |
7351a482 SW |
1299 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1300 | if (WARN_ON(!orig_ifinfo)) { | |
1301 | batadv_orig_node_free_ref(orig_node); | |
1302 | return 0; | |
1303 | } | |
1304 | ||
bbad0a5e | 1305 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1306 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1307 | |
1308 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1309 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1310 | batadv_window_protected(bat_priv, seq_diff, |
7351a482 | 1311 | &orig_ifinfo->batman_seqno_reset)) { |
7c24bbbe | 1312 | ret = BATADV_PROTECTED; |
fc957275 | 1313 | goto out; |
7c24bbbe | 1314 | } |
fc957275 ML |
1315 | |
1316 | rcu_read_lock(); | |
89652331 SW |
1317 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1318 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1319 | if_outgoing); | |
1320 | if (!neigh_ifinfo) | |
1321 | continue; | |
1322 | ||
1323 | neigh_addr = neigh_node->addr; | |
1324 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1325 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1326 | seqno); |
1327 | ||
1eda58bf | 1328 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1329 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1330 | set_mark = 1; |
7c24bbbe SW |
1331 | if (is_dup) |
1332 | ret = BATADV_NEIGH_DUP; | |
1333 | } else { | |
fc957275 | 1334 | set_mark = 0; |
7c24bbbe SW |
1335 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1336 | ret = BATADV_ORIG_DUP; | |
1337 | } | |
fc957275 ML |
1338 | |
1339 | /* if the window moved, set the update flag. */ | |
89652331 | 1340 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1341 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1342 | seq_diff, set_mark); |
fc957275 | 1343 | |
89652331 | 1344 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1345 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 SW |
1346 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
1347 | batadv_neigh_ifinfo_free_ref(neigh_ifinfo); | |
fc957275 ML |
1348 | } |
1349 | rcu_read_unlock(); | |
1350 | ||
1351 | if (need_update) { | |
39c75a51 | 1352 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1353 | "%s updating last_seqno: old %u, new %u\n", |
1354 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1355 | orig_ifinfo->last_real_seqno, seqno); | |
1356 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1357 | } |
1358 | ||
fc957275 | 1359 | out: |
bbad0a5e | 1360 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7d211efc | 1361 | batadv_orig_node_free_ref(orig_node); |
a0c77227 | 1362 | batadv_orig_ifinfo_free_ref(orig_ifinfo); |
fc957275 ML |
1363 | return ret; |
1364 | } | |
1365 | ||
7351a482 SW |
1366 | /** |
1367 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1368 | * @skb: the skb containing the OGM | |
95298a91 | 1369 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1370 | * @orig_node: the (cached) orig node for the originator of this OGM |
1371 | * @if_incoming: the interface where this packet was received | |
1372 | * @if_outgoing: the interface for which the packet should be considered | |
1373 | */ | |
1374 | static void | |
1375 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1376 | struct batadv_orig_node *orig_node, | |
1377 | struct batadv_hard_iface *if_incoming, | |
1378 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1379 | { |
56303d34 | 1380 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1381 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1382 | struct batadv_neigh_node *router = NULL; |
1383 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1384 | struct batadv_orig_node *orig_neigh_node; |
1385 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1386 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1387 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1388 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1389 | enum batadv_dup_status dup_status; |
7351a482 SW |
1390 | bool is_from_best_next_hop = false; |
1391 | bool is_single_hop_neigh = false; | |
1392 | bool sameseq, similar_ttl; | |
1393 | struct sk_buff *skb_priv; | |
1394 | struct ethhdr *ethhdr; | |
6b5e971a | 1395 | u8 *prev_sender; |
7351a482 | 1396 | int is_bidirect; |
fc957275 | 1397 | |
7351a482 SW |
1398 | /* create a private copy of the skb, as some functions change tq value |
1399 | * and/or flags. | |
fc957275 | 1400 | */ |
7351a482 SW |
1401 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1402 | if (!skb_priv) | |
fc957275 ML |
1403 | return; |
1404 | ||
7351a482 SW |
1405 | ethhdr = eth_hdr(skb_priv); |
1406 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1407 | |
7351a482 SW |
1408 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1409 | if_incoming, if_outgoing); | |
1410 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1411 | is_single_hop_neigh = true; |
fc957275 | 1412 | |
7c24bbbe | 1413 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1414 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1415 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1416 | ethhdr->h_source); | |
fc957275 ML |
1417 | goto out; |
1418 | } | |
1419 | ||
7351a482 | 1420 | if (ogm_packet->tq == 0) { |
39c75a51 | 1421 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1422 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1423 | goto out; |
1424 | } | |
1425 | ||
4ff1e2a7 ML |
1426 | if (is_single_hop_neigh) { |
1427 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1428 | ethhdr->h_source); | |
1429 | if (hardif_neigh) | |
1430 | hardif_neigh->last_seen = jiffies; | |
1431 | } | |
1432 | ||
7351a482 | 1433 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1434 | if (router) { |
7351a482 SW |
1435 | router_router = batadv_orig_router_get(router->orig_node, |
1436 | if_outgoing); | |
1437 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1438 | } |
fc957275 | 1439 | |
7351a482 | 1440 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1441 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1442 | is_from_best_next_hop = true; |
1443 | ||
7351a482 | 1444 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1445 | /* avoid temporary routing loops */ |
1446 | if (router && router_router && | |
1eda58bf | 1447 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1448 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1449 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1450 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1451 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1452 | ethhdr->h_source); | |
fc957275 ML |
1453 | goto out; |
1454 | } | |
1455 | ||
7351a482 SW |
1456 | if (if_outgoing == BATADV_IF_DEFAULT) |
1457 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1458 | |
fc957275 | 1459 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1460 | * originator mac |
1461 | */ | |
c67893d1 SE |
1462 | if (is_single_hop_neigh) |
1463 | orig_neigh_node = orig_node; | |
1464 | else | |
bbad0a5e AQ |
1465 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1466 | ethhdr->h_source); | |
c67893d1 | 1467 | |
fc957275 ML |
1468 | if (!orig_neigh_node) |
1469 | goto out; | |
1470 | ||
d56b1705 MH |
1471 | /* Update nc_nodes of the originator */ |
1472 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1473 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1474 | |
7351a482 SW |
1475 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1476 | if_outgoing); | |
fc957275 ML |
1477 | |
1478 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1479 | * don't route towards it |
1480 | */ | |
fc957275 | 1481 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1482 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1483 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1484 | goto out_neigh; |
1485 | } | |
1486 | ||
fe8bc396 | 1487 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1488 | ogm_packet, if_incoming, |
1489 | if_outgoing); | |
fc957275 | 1490 | |
fc957275 | 1491 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1492 | * seqno and similar ttl as the non-duplicate |
1493 | */ | |
7351a482 SW |
1494 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1495 | if (!orig_ifinfo) | |
1496 | goto out_neigh; | |
1497 | ||
1498 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1499 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1500 | ||
7c24bbbe | 1501 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1502 | (sameseq && similar_ttl))) { |
1503 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1504 | orig_ifinfo, ethhdr, | |
1505 | ogm_packet, if_incoming, | |
1506 | if_outgoing, dup_status); | |
1507 | } | |
1508 | batadv_orig_ifinfo_free_ref(orig_ifinfo); | |
fc957275 | 1509 | |
ef0a937f SW |
1510 | /* only forward for specific interface, not for the default one. */ |
1511 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1512 | goto out_neigh; | |
1513 | ||
fc957275 ML |
1514 | /* is single hop (direct) neighbor */ |
1515 | if (is_single_hop_neigh) { | |
7351a482 SW |
1516 | /* OGMs from secondary interfaces should only scheduled once |
1517 | * per interface where it has been received, not multiple times | |
1518 | */ | |
1519 | if ((ogm_packet->ttl <= 2) && | |
1520 | (if_incoming != if_outgoing)) { | |
1521 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1522 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1523 | goto out_neigh; | |
1524 | } | |
fc957275 | 1525 | /* mark direct link on incoming interface */ |
7351a482 | 1526 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1527 | is_single_hop_neigh, |
ef0a937f SW |
1528 | is_from_best_next_hop, if_incoming, |
1529 | if_outgoing); | |
fc957275 | 1530 | |
39c75a51 | 1531 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1532 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1533 | goto out_neigh; |
1534 | } | |
1535 | ||
1536 | /* multihop originator */ | |
fe8bc396 | 1537 | if (!is_bidirect) { |
39c75a51 | 1538 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1539 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1540 | goto out_neigh; |
1541 | } | |
1542 | ||
7c24bbbe | 1543 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1544 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1545 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1546 | goto out_neigh; |
1547 | } | |
1548 | ||
39c75a51 | 1549 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1550 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1551 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1552 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1553 | if_incoming, if_outgoing); |
fc957275 ML |
1554 | |
1555 | out_neigh: | |
1556 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
7d211efc | 1557 | batadv_orig_node_free_ref(orig_neigh_node); |
fc957275 | 1558 | out: |
c1e517fb SW |
1559 | if (router_ifinfo) |
1560 | batadv_neigh_ifinfo_free_ref(router_ifinfo); | |
fc957275 | 1561 | if (router) |
7d211efc | 1562 | batadv_neigh_node_free_ref(router); |
fc957275 | 1563 | if (router_router) |
7d211efc | 1564 | batadv_neigh_node_free_ref(router_router); |
fc957275 | 1565 | if (orig_neigh_router) |
7d211efc | 1566 | batadv_neigh_node_free_ref(orig_neigh_router); |
4ff1e2a7 ML |
1567 | if (hardif_neigh) |
1568 | batadv_hardif_neigh_free_ref(hardif_neigh); | |
fc957275 | 1569 | |
7351a482 SW |
1570 | kfree_skb(skb_priv); |
1571 | } | |
1572 | ||
1573 | /** | |
1574 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1575 | * @skb: the skb containing the OGM | |
1576 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1577 | * @if_incoming: the interface where this packet was receved | |
1578 | */ | |
1579 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1580 | struct batadv_hard_iface *if_incoming) | |
1581 | { | |
1582 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1583 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1584 | struct batadv_hard_iface *hard_iface; | |
1585 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1586 | u32 if_incoming_seqno; |
7351a482 SW |
1587 | bool has_directlink_flag; |
1588 | struct ethhdr *ethhdr; | |
1589 | bool is_my_oldorig = false; | |
1590 | bool is_my_addr = false; | |
1591 | bool is_my_orig = false; | |
1592 | ||
1593 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1594 | ethhdr = eth_hdr(skb); | |
1595 | ||
1596 | /* Silently drop when the batman packet is actually not a | |
1597 | * correct packet. | |
1598 | * | |
1599 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1600 | * minimum frame length of 64 byte) and the aggregation interprets | |
1601 | * it as an additional length. | |
1602 | * | |
1603 | * TODO: A more sane solution would be to have a bit in the | |
1604 | * batadv_ogm_packet to detect whether the packet is the last | |
1605 | * packet in an aggregation. Here we expect that the padding | |
1606 | * is always zero (or not 0x01) | |
1607 | */ | |
1608 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1609 | return; | |
1610 | ||
1611 | /* could be changed by schedule_own_packet() */ | |
1612 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1613 | ||
1614 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1615 | has_directlink_flag = true; | |
1616 | else | |
1617 | has_directlink_flag = false; | |
1618 | ||
1619 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1620 | "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", | |
1621 | ethhdr->h_source, if_incoming->net_dev->name, | |
1622 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1623 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1624 | ogm_packet->tq, ogm_packet->ttl, | |
1625 | ogm_packet->version, has_directlink_flag); | |
1626 | ||
1627 | rcu_read_lock(); | |
1628 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1629 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1630 | continue; | |
1631 | ||
1632 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1633 | continue; | |
1634 | ||
1635 | if (batadv_compare_eth(ethhdr->h_source, | |
1636 | hard_iface->net_dev->dev_addr)) | |
1637 | is_my_addr = true; | |
1638 | ||
1639 | if (batadv_compare_eth(ogm_packet->orig, | |
1640 | hard_iface->net_dev->dev_addr)) | |
1641 | is_my_orig = true; | |
1642 | ||
1643 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1644 | hard_iface->net_dev->dev_addr)) | |
1645 | is_my_oldorig = true; | |
1646 | } | |
1647 | rcu_read_unlock(); | |
1648 | ||
1649 | if (is_my_addr) { | |
1650 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1651 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1652 | ethhdr->h_source); | |
1653 | return; | |
1654 | } | |
1655 | ||
1656 | if (is_my_orig) { | |
1657 | unsigned long *word; | |
1658 | int offset; | |
6b5e971a SE |
1659 | s32 bit_pos; |
1660 | s16 if_num; | |
1661 | u8 *weight; | |
7351a482 SW |
1662 | |
1663 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1664 | ethhdr->h_source); | |
1665 | if (!orig_neigh_node) | |
1666 | return; | |
1667 | ||
1668 | /* neighbor has to indicate direct link and it has to | |
1669 | * come via the corresponding interface | |
1670 | * save packet seqno for bidirectional check | |
1671 | */ | |
1672 | if (has_directlink_flag && | |
1673 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1674 | ogm_packet->orig)) { | |
1675 | if_num = if_incoming->if_num; | |
1676 | offset = if_num * BATADV_NUM_WORDS; | |
1677 | ||
1678 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1679 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1680 | bit_pos = if_incoming_seqno - 2; |
1681 | bit_pos -= ntohl(ogm_packet->seqno); | |
1682 | batadv_set_bit(word, bit_pos); | |
1683 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1684 | *weight = bitmap_weight(word, | |
1685 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1686 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1687 | } | |
1688 | ||
1689 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1690 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
1691 | batadv_orig_node_free_ref(orig_neigh_node); | |
1692 | return; | |
1693 | } | |
1694 | ||
1695 | if (is_my_oldorig) { | |
1696 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1697 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1698 | ethhdr->h_source); | |
1699 | return; | |
1700 | } | |
1701 | ||
1702 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1703 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1704 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1705 | ethhdr->h_source); | |
1706 | return; | |
1707 | } | |
1708 | ||
1709 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1710 | if (!orig_node) | |
1711 | return; | |
1712 | ||
1713 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1714 | if_incoming, BATADV_IF_DEFAULT); | |
1715 | ||
1716 | rcu_read_lock(); | |
1717 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1718 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1719 | continue; | |
1720 | ||
1721 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1722 | continue; | |
1723 | ||
1724 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1725 | if_incoming, hard_iface); | |
1726 | } | |
1727 | rcu_read_unlock(); | |
1728 | ||
7d211efc | 1729 | batadv_orig_node_free_ref(orig_node); |
fc957275 ML |
1730 | } |
1731 | ||
fe8bc396 | 1732 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1733 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1734 | { |
56303d34 | 1735 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1736 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1737 | u8 *packet_pos; |
7351a482 | 1738 | int ogm_offset; |
ef261577 | 1739 | bool ret; |
c3e29312 | 1740 | |
7e071c79 | 1741 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1742 | if (!ret) |
1743 | return NET_RX_DROP; | |
fc957275 | 1744 | |
edbf12ba ML |
1745 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1746 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1747 | */ | |
fe8bc396 | 1748 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1749 | return NET_RX_DROP; |
1750 | ||
d69909d2 SE |
1751 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1752 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1753 | skb->len + ETH_HLEN); |
1754 | ||
7351a482 SW |
1755 | ogm_offset = 0; |
1756 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1757 | |
1758 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1759 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1760 | ogm_packet->tvlv_len)) { | |
1761 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1762 | |
7351a482 SW |
1763 | ogm_offset += BATADV_OGM_HLEN; |
1764 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1765 | |
7351a482 SW |
1766 | packet_pos = skb->data + ogm_offset; |
1767 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1768 | } |
c3e29312 ML |
1769 | |
1770 | kfree_skb(skb); | |
1771 | return NET_RX_SUCCESS; | |
fc957275 | 1772 | } |
1c280471 | 1773 | |
1b371d13 SW |
1774 | /** |
1775 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1776 | * @orig_node: the orig_node for which the neighbors are printed |
1777 | * @if_outgoing: outgoing interface for these entries | |
1778 | * @seq: debugfs table seq_file struct | |
1779 | * | |
1780 | * Must be called while holding an rcu lock. | |
1781 | */ | |
1782 | static void | |
1783 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1784 | struct batadv_hard_iface *if_outgoing, | |
1785 | struct seq_file *seq) | |
1786 | { | |
1787 | struct batadv_neigh_node *neigh_node; | |
1788 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1789 | ||
1790 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1791 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1792 | if (!n_ifinfo) | |
1793 | continue; | |
1794 | ||
1795 | seq_printf(seq, " %pM (%3i)", | |
1796 | neigh_node->addr, | |
1797 | n_ifinfo->bat_iv.tq_avg); | |
1798 | ||
1799 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
1800 | } | |
1801 | } | |
1802 | ||
737a2a22 AQ |
1803 | /** |
1804 | * batadv_iv_ogm_orig_print - print the originator table | |
1805 | * @bat_priv: the bat priv with all the soft interface information | |
1806 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1807 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1808 | */ |
1809 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1810 | struct seq_file *seq, |
1811 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1812 | { |
89652331 | 1813 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1814 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1815 | int last_seen_msecs, last_seen_secs; | |
1816 | struct batadv_orig_node *orig_node; | |
89652331 | 1817 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1818 | unsigned long last_seen_jiffies; |
1819 | struct hlist_head *head; | |
1820 | int batman_count = 0; | |
6b5e971a | 1821 | u32 i; |
737a2a22 AQ |
1822 | |
1823 | seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", | |
1824 | "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, | |
1825 | "Nexthop", "outgoingIF", "Potential nexthops"); | |
1826 | ||
1827 | for (i = 0; i < hash->size; i++) { | |
1828 | head = &hash->table[i]; | |
1829 | ||
1830 | rcu_read_lock(); | |
1831 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1832 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1833 | if_outgoing); |
737a2a22 AQ |
1834 | if (!neigh_node) |
1835 | continue; | |
1836 | ||
89652331 | 1837 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1838 | if_outgoing); |
89652331 SW |
1839 | if (!n_ifinfo) |
1840 | goto next; | |
1841 | ||
1842 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1843 | goto next; |
1844 | ||
1845 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1846 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1847 | last_seen_secs = last_seen_msecs / 1000; | |
1848 | last_seen_msecs = last_seen_msecs % 1000; | |
1849 | ||
1850 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1851 | orig_node->orig, last_seen_secs, | |
89652331 | 1852 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1853 | neigh_node->addr, |
1854 | neigh_node->if_incoming->net_dev->name); | |
1855 | ||
cb1c92ec SW |
1856 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1857 | seq); | |
737a2a22 AQ |
1858 | seq_puts(seq, "\n"); |
1859 | batman_count++; | |
1860 | ||
1861 | next: | |
1862 | batadv_neigh_node_free_ref(neigh_node); | |
89652331 SW |
1863 | if (n_ifinfo) |
1864 | batadv_neigh_ifinfo_free_ref(n_ifinfo); | |
737a2a22 AQ |
1865 | } |
1866 | rcu_read_unlock(); | |
1867 | } | |
1868 | ||
1869 | if (batman_count == 0) | |
1870 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1871 | } | |
1872 | ||
7587405a ML |
1873 | /** |
1874 | * batadv_iv_hardif_neigh_print - print a single hop neighbour node | |
1875 | * @seq: neighbour table seq_file struct | |
1876 | * @hardif_neigh: hardif neighbour information | |
1877 | */ | |
1878 | static void | |
1879 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
1880 | struct batadv_hardif_neigh_node *hardif_neigh) | |
1881 | { | |
1882 | int last_secs, last_msecs; | |
1883 | ||
1884 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
1885 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
1886 | ||
1887 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
1888 | hardif_neigh->if_incoming->net_dev->name, | |
1889 | hardif_neigh->addr, last_secs, last_msecs); | |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * batadv_iv_ogm_neigh_print - print the single hop neighbour list | |
1894 | * @bat_priv: the bat priv with all the soft interface information | |
1895 | * @seq: neighbour table seq_file struct | |
1896 | */ | |
1897 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
1898 | struct seq_file *seq) | |
1899 | { | |
1900 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1901 | struct batadv_hardif_neigh_node *hardif_neigh; | |
1902 | struct batadv_hard_iface *hard_iface; | |
1903 | int batman_count = 0; | |
1904 | ||
1905 | seq_printf(seq, " %10s %-13s %s\n", | |
1906 | "IF", "Neighbor", "last-seen"); | |
1907 | ||
1908 | rcu_read_lock(); | |
1909 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1910 | if (hard_iface->soft_iface != net_dev) | |
1911 | continue; | |
1912 | ||
1913 | hlist_for_each_entry_rcu(hardif_neigh, | |
1914 | &hard_iface->neigh_list, list) { | |
1915 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
1916 | batman_count++; | |
1917 | } | |
1918 | } | |
1919 | rcu_read_unlock(); | |
1920 | ||
1921 | if (batman_count == 0) | |
1922 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1923 | } | |
1924 | ||
a3285a8f AQ |
1925 | /** |
1926 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
1927 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 1928 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 1929 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1930 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f AQ |
1931 | * |
1932 | * Returns a value less, equal to or greater than 0 if the metric via neigh1 is | |
1933 | * lower, the same as or higher than the metric via neigh2 | |
1934 | */ | |
1935 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
1936 | struct batadv_hard_iface *if_outgoing1, |
1937 | struct batadv_neigh_node *neigh2, | |
1938 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 1939 | { |
89652331 | 1940 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 1941 | u8 tq1, tq2; |
89652331 SW |
1942 | int diff; |
1943 | ||
1944 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
1945 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 1946 | |
89652331 SW |
1947 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
1948 | diff = 0; | |
1949 | goto out; | |
1950 | } | |
a3285a8f | 1951 | |
89652331 SW |
1952 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
1953 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1954 | diff = tq1 - tq2; | |
1955 | ||
1956 | out: | |
1957 | if (neigh1_ifinfo) | |
1958 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
1959 | if (neigh2_ifinfo) | |
1960 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
1961 | ||
1962 | return diff; | |
a3285a8f AQ |
1963 | } |
1964 | ||
c43c981e | 1965 | /** |
18165f6f SW |
1966 | * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better |
1967 | * than neigh2 from the metric prospective | |
c43c981e | 1968 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 1969 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 1970 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1971 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 1972 | * |
89652331 SW |
1973 | * Returns true if the metric via neigh1 is equally good or better than |
1974 | * the metric via neigh2, false otherwise. | |
c43c981e | 1975 | */ |
89652331 | 1976 | static bool |
18165f6f | 1977 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
1978 | struct batadv_hard_iface *if_outgoing1, |
1979 | struct batadv_neigh_node *neigh2, | |
1980 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 1981 | { |
89652331 | 1982 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 1983 | u8 tq1, tq2; |
89652331 | 1984 | bool ret; |
c43c981e | 1985 | |
89652331 SW |
1986 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
1987 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
1988 | ||
1989 | /* we can't say that the metric is better */ | |
1990 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
1991 | ret = false; | |
1992 | goto out; | |
1993 | } | |
1994 | ||
1995 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
1996 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1997 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
1998 | ||
1999 | out: | |
2000 | if (neigh1_ifinfo) | |
2001 | batadv_neigh_ifinfo_free_ref(neigh1_ifinfo); | |
2002 | if (neigh2_ifinfo) | |
2003 | batadv_neigh_ifinfo_free_ref(neigh2_ifinfo); | |
2004 | ||
2005 | return ret; | |
c43c981e AQ |
2006 | } |
2007 | ||
56303d34 | 2008 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2009 | .name = "BATMAN_IV", |
fe8bc396 SE |
2010 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
2011 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
2012 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
2013 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
2014 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
2015 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
a3285a8f | 2016 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
18165f6f | 2017 | .bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob, |
7587405a | 2018 | .bat_neigh_print = batadv_iv_neigh_print, |
737a2a22 | 2019 | .bat_orig_print = batadv_iv_ogm_orig_print, |
d0015fdd AQ |
2020 | .bat_orig_free = batadv_iv_ogm_orig_free, |
2021 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, | |
2022 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, | |
1c280471 ML |
2023 | }; |
2024 | ||
81c524f7 | 2025 | int __init batadv_iv_init(void) |
1c280471 | 2026 | { |
c3e29312 ML |
2027 | int ret; |
2028 | ||
2029 | /* batman originator packet */ | |
acd34afa SE |
2030 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2031 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2032 | if (ret < 0) |
2033 | goto out; | |
2034 | ||
fe8bc396 | 2035 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2036 | if (ret < 0) |
2037 | goto handler_unregister; | |
2038 | ||
2039 | goto out; | |
2040 | ||
2041 | handler_unregister: | |
acd34afa | 2042 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2043 | out: |
2044 | return ret; | |
1c280471 | 2045 | } |