Commit | Line | Data |
---|---|---|
0046b040 | 1 | /* Copyright (C) 2007-2016 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> | |
77ae32e8 | 34 | #include <linux/kref.h> |
64ae7445 | 35 | #include <linux/lockdep.h> |
1e2c2a4f SE |
36 | #include <linux/netdevice.h> |
37 | #include <linux/pkt_sched.h> | |
38 | #include <linux/printk.h> | |
39 | #include <linux/random.h> | |
40 | #include <linux/rculist.h> | |
41 | #include <linux/rcupdate.h> | |
42 | #include <linux/seq_file.h> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/spinlock.h> | |
46 | #include <linux/stddef.h> | |
47 | #include <linux/string.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/workqueue.h> | |
50 | ||
51 | #include "bitarray.h" | |
52 | #include "hard-interface.h" | |
53 | #include "hash.h" | |
54 | #include "network-coding.h" | |
fc957275 | 55 | #include "originator.h" |
1e2c2a4f | 56 | #include "packet.h" |
fc957275 | 57 | #include "routing.h" |
fc957275 | 58 | #include "send.h" |
1e2c2a4f | 59 | #include "translation-table.h" |
fc957275 | 60 | |
791c2a2d | 61 | /** |
95298a91 | 62 | * enum batadv_dup_status - duplicate status |
9f52ee19 | 63 | * @BATADV_NO_DUP: the packet is no duplicate |
791c2a2d AQ |
64 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
65 | * neighbor) | |
66 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
67 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
68 | */ | |
69 | enum batadv_dup_status { | |
70 | BATADV_NO_DUP = 0, | |
71 | BATADV_ORIG_DUP, | |
72 | BATADV_NEIGH_DUP, | |
73 | BATADV_PROTECTED, | |
74 | }; | |
75 | ||
24a5deeb AQ |
76 | /** |
77 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
78 | * @lq_recv: pointer to the ring buffer | |
79 | * @lq_index: index to store the value at | |
80 | * @value: value to store in the ring buffer | |
81 | */ | |
6b5e971a | 82 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
83 | { |
84 | lq_recv[*lq_index] = value; | |
85 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
86 | } | |
87 | ||
88 | /** | |
d491dbb6 | 89 | * batadv_ring_buffer_avg - compute the average of all non-zero values stored |
24a5deeb AQ |
90 | * in the given ring buffer |
91 | * @lq_recv: pointer to the ring buffer | |
92 | * | |
62fe710f | 93 | * Return: computed average value. |
24a5deeb | 94 | */ |
6b5e971a | 95 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 96 | { |
6b5e971a SE |
97 | const u8 *ptr; |
98 | u16 count = 0; | |
99 | u16 i = 0; | |
100 | u16 sum = 0; | |
24a5deeb AQ |
101 | |
102 | ptr = lq_recv; | |
103 | ||
104 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
105 | if (*ptr != 0) { | |
106 | count++; | |
107 | sum += *ptr; | |
108 | } | |
109 | ||
110 | i++; | |
111 | ptr++; | |
112 | } | |
113 | ||
114 | if (count == 0) | |
115 | return 0; | |
116 | ||
6b5e971a | 117 | return (u8)(sum / count); |
24a5deeb | 118 | } |
d98cae64 | 119 | |
d0015fdd AQ |
120 | /** |
121 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
122 | * orig_node | |
123 | * @orig_node: the orig_node for which the resources have to be free'd | |
124 | */ | |
125 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
126 | { | |
127 | kfree(orig_node->bat_iv.bcast_own); | |
128 | kfree(orig_node->bat_iv.bcast_own_sum); | |
129 | } | |
130 | ||
131 | /** | |
132 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
133 | * include the new hard-interface | |
134 | * @orig_node: the orig_node that has to be changed | |
135 | * @max_if_num: the current amount of interfaces | |
136 | * | |
62fe710f | 137 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
138 | */ |
139 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
140 | int max_if_num) | |
141 | { | |
142 | void *data_ptr; | |
0185dda6 | 143 | size_t old_size; |
d0015fdd AQ |
144 | int ret = -ENOMEM; |
145 | ||
146 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
147 | ||
d0015fdd | 148 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
149 | data_ptr = kmalloc_array(max_if_num, |
150 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
151 | GFP_ATOMIC); | |
d0015fdd AQ |
152 | if (!data_ptr) |
153 | goto unlock; | |
154 | ||
155 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
156 | kfree(orig_node->bat_iv.bcast_own); | |
157 | orig_node->bat_iv.bcast_own = data_ptr; | |
158 | ||
6b5e971a | 159 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
d0015fdd AQ |
160 | if (!data_ptr) { |
161 | kfree(orig_node->bat_iv.bcast_own); | |
162 | goto unlock; | |
163 | } | |
164 | ||
165 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 166 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
167 | kfree(orig_node->bat_iv.bcast_own_sum); |
168 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
169 | ||
170 | ret = 0; | |
171 | ||
172 | unlock: | |
173 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
174 | ||
175 | return ret; | |
176 | } | |
177 | ||
178 | /** | |
64ae7445 | 179 | * batadv_iv_ogm_drop_bcast_own_entry - drop section of bcast_own |
d0015fdd AQ |
180 | * @orig_node: the orig_node that has to be changed |
181 | * @max_if_num: the current amount of interfaces | |
182 | * @del_if_num: the index of the interface being removed | |
d0015fdd | 183 | */ |
64ae7445 SE |
184 | static void |
185 | batadv_iv_ogm_drop_bcast_own_entry(struct batadv_orig_node *orig_node, | |
186 | int max_if_num, int del_if_num) | |
d0015fdd | 187 | { |
64ae7445 SE |
188 | size_t chunk_size; |
189 | size_t if_offset; | |
190 | void *data_ptr; | |
d0015fdd | 191 | |
64ae7445 | 192 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); |
d0015fdd AQ |
193 | |
194 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 195 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd | 196 | if (!data_ptr) |
64ae7445 SE |
197 | /* use old buffer when new one could not be allocated */ |
198 | data_ptr = orig_node->bat_iv.bcast_own; | |
d0015fdd AQ |
199 | |
200 | /* copy first part */ | |
64ae7445 | 201 | memmove(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); |
d0015fdd AQ |
202 | |
203 | /* copy second part */ | |
13bbdd37 | 204 | if_offset = (del_if_num + 1) * chunk_size; |
64ae7445 SE |
205 | memmove((char *)data_ptr + del_if_num * chunk_size, |
206 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, | |
207 | (max_if_num - del_if_num) * chunk_size); | |
d0015fdd | 208 | |
64ae7445 SE |
209 | /* bcast_own was shrunk down in new buffer; free old one */ |
210 | if (orig_node->bat_iv.bcast_own != data_ptr) { | |
211 | kfree(orig_node->bat_iv.bcast_own); | |
212 | orig_node->bat_iv.bcast_own = data_ptr; | |
213 | } | |
214 | } | |
d0015fdd | 215 | |
64ae7445 SE |
216 | /** |
217 | * batadv_iv_ogm_drop_bcast_own_sum_entry - drop section of bcast_own_sum | |
218 | * @orig_node: the orig_node that has to be changed | |
219 | * @max_if_num: the current amount of interfaces | |
220 | * @del_if_num: the index of the interface being removed | |
221 | */ | |
222 | static void | |
223 | batadv_iv_ogm_drop_bcast_own_sum_entry(struct batadv_orig_node *orig_node, | |
224 | int max_if_num, int del_if_num) | |
225 | { | |
226 | size_t if_offset; | |
227 | void *data_ptr; | |
228 | ||
229 | lockdep_assert_held(&orig_node->bat_iv.ogm_cnt_lock); | |
d0015fdd | 230 | |
6b5e971a | 231 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
64ae7445 SE |
232 | if (!data_ptr) |
233 | /* use old buffer when new one could not be allocated */ | |
234 | data_ptr = orig_node->bat_iv.bcast_own_sum; | |
d0015fdd | 235 | |
64ae7445 SE |
236 | memmove(data_ptr, orig_node->bat_iv.bcast_own_sum, |
237 | del_if_num * sizeof(u8)); | |
d0015fdd | 238 | |
6b5e971a | 239 | if_offset = (del_if_num + 1) * sizeof(u8); |
64ae7445 SE |
240 | memmove((char *)data_ptr + del_if_num * sizeof(u8), |
241 | orig_node->bat_iv.bcast_own_sum + if_offset, | |
242 | (max_if_num - del_if_num) * sizeof(u8)); | |
243 | ||
244 | /* bcast_own_sum was shrunk down in new buffer; free old one */ | |
245 | if (orig_node->bat_iv.bcast_own_sum != data_ptr) { | |
246 | kfree(orig_node->bat_iv.bcast_own_sum); | |
247 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
248 | } | |
249 | } | |
d0015fdd | 250 | |
64ae7445 SE |
251 | /** |
252 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
253 | * exclude the removed interface | |
254 | * @orig_node: the orig_node that has to be changed | |
255 | * @max_if_num: the current amount of interfaces | |
256 | * @del_if_num: the index of the interface being removed | |
257 | * | |
258 | * Return: 0 on success, a negative error code otherwise. | |
259 | */ | |
260 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
261 | int max_if_num, int del_if_num) | |
262 | { | |
263 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
264 | ||
265 | if (max_if_num == 0) { | |
266 | kfree(orig_node->bat_iv.bcast_own); | |
267 | kfree(orig_node->bat_iv.bcast_own_sum); | |
268 | orig_node->bat_iv.bcast_own = NULL; | |
269 | orig_node->bat_iv.bcast_own_sum = NULL; | |
270 | } else { | |
271 | batadv_iv_ogm_drop_bcast_own_entry(orig_node, max_if_num, | |
272 | del_if_num); | |
273 | batadv_iv_ogm_drop_bcast_own_sum_entry(orig_node, max_if_num, | |
274 | del_if_num); | |
275 | } | |
d0015fdd | 276 | |
d0015fdd AQ |
277 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
278 | ||
64ae7445 | 279 | return 0; |
d0015fdd AQ |
280 | } |
281 | ||
bbad0a5e AQ |
282 | /** |
283 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
284 | * @bat_priv: the bat priv with all the soft interface information | |
285 | * @addr: mac address of the originator | |
286 | * | |
62fe710f | 287 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
288 | * on failure. |
289 | * If the object does not exists it is created an initialised. | |
290 | */ | |
291 | static struct batadv_orig_node * | |
6b5e971a | 292 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
293 | { |
294 | struct batadv_orig_node *orig_node; | |
295 | int size, hash_added; | |
296 | ||
297 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
298 | if (orig_node) | |
299 | return orig_node; | |
300 | ||
301 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
302 | if (!orig_node) | |
303 | return NULL; | |
304 | ||
305 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
306 | ||
307 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
308 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
309 | if (!orig_node->bat_iv.bcast_own) | |
310 | goto free_orig_node; | |
311 | ||
6b5e971a | 312 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
313 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
314 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 315 | goto free_orig_node; |
bbad0a5e AQ |
316 | |
317 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
318 | batadv_choose_orig, orig_node, | |
319 | &orig_node->hash_entry); | |
320 | if (hash_added != 0) | |
a5a5cb8c | 321 | goto free_orig_node; |
bbad0a5e AQ |
322 | |
323 | return orig_node; | |
324 | ||
bbad0a5e | 325 | free_orig_node: |
b2262df7 | 326 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
5d967310 SE |
327 | batadv_orig_node_put(orig_node); |
328 | batadv_orig_node_put(orig_node); | |
bbad0a5e AQ |
329 | |
330 | return NULL; | |
331 | } | |
332 | ||
56303d34 SE |
333 | static struct batadv_neigh_node * |
334 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 335 | const u8 *neigh_addr, |
56303d34 | 336 | struct batadv_orig_node *orig_node, |
863dd7a8 | 337 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 338 | { |
741aa06b | 339 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 340 | |
3f32f8a6 | 341 | neigh_node = batadv_neigh_node_new(orig_node, hard_iface, neigh_addr); |
7ae8b285 ML |
342 | if (!neigh_node) |
343 | goto out; | |
344 | ||
89652331 | 345 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 346 | |
7ae8b285 ML |
347 | out: |
348 | return neigh_node; | |
349 | } | |
350 | ||
56303d34 | 351 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 352 | { |
96412690 | 353 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 354 | unsigned char *ogm_buff; |
6b5e971a | 355 | u32 random_seqno; |
d7d32ec0 ML |
356 | |
357 | /* randomize initial seqno to avoid collision */ | |
358 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 359 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 360 | |
14511519 ML |
361 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
362 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
363 | if (!ogm_buff) | |
42d9f2cb | 364 | return -ENOMEM; |
77af7575 | 365 | |
14511519 ML |
366 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
367 | ||
368 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
369 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
370 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
371 | batadv_ogm_packet->ttl = 2; | |
96412690 | 372 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 373 | batadv_ogm_packet->reserved = 0; |
96412690 | 374 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 375 | |
42d9f2cb | 376 | return 0; |
d0b9fd89 ML |
377 | } |
378 | ||
56303d34 | 379 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 380 | { |
14511519 ML |
381 | kfree(hard_iface->bat_iv.ogm_buff); |
382 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
383 | } |
384 | ||
56303d34 | 385 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 386 | { |
96412690 | 387 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 388 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 389 | |
14511519 | 390 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
391 | ether_addr_copy(batadv_ogm_packet->orig, |
392 | hard_iface->net_dev->dev_addr); | |
393 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
394 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
395 | } |
396 | ||
56303d34 SE |
397 | static void |
398 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 399 | { |
96412690 | 400 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 401 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 402 | |
14511519 | 403 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 404 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
405 | } |
406 | ||
b9dacc52 | 407 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 408 | static unsigned long |
56303d34 | 409 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 410 | { |
42d0b044 SE |
411 | unsigned int msecs; |
412 | ||
413 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 414 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
415 | |
416 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
417 | } |
418 | ||
419 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 420 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 421 | { |
e76e4320 | 422 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
423 | } |
424 | ||
425 | /* apply hop penalty for a normal link */ | |
6b5e971a | 426 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
427 | { |
428 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
429 | int new_tq; |
430 | ||
431 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
432 | new_tq /= BATADV_TQ_MAX_VALUE; | |
433 | ||
434 | return new_tq; | |
b9dacc52 ML |
435 | } |
436 | ||
600184b7 SW |
437 | /** |
438 | * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached | |
439 | * @buff_pos: current position in the skb | |
440 | * @packet_len: total length of the skb | |
441 | * @tvlv_len: tvlv length of the previously considered OGM | |
442 | * | |
443 | * Return: true if there is enough space for another OGM, false otherwise. | |
444 | */ | |
9fd9b19e MP |
445 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
446 | __be16 tvlv_len) | |
fc957275 | 447 | { |
08c36d3e SE |
448 | int next_buff_pos = 0; |
449 | ||
7e071c79 | 450 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 451 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
452 | |
453 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 454 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
455 | } |
456 | ||
b9dacc52 | 457 | /* send a batman ogm to a given interface */ |
56303d34 SE |
458 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
459 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 460 | { |
56303d34 | 461 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 462 | const char *fwd_str; |
6b5e971a SE |
463 | u8 packet_num; |
464 | s16 buff_pos; | |
96412690 | 465 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 466 | struct sk_buff *skb; |
6b5e971a | 467 | u8 *packet_pos; |
b9dacc52 | 468 | |
e9a4f295 | 469 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
470 | return; |
471 | ||
472 | packet_num = 0; | |
473 | buff_pos = 0; | |
c67893d1 SE |
474 | packet_pos = forw_packet->skb->data; |
475 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
476 | |
477 | /* adjust all flags and log packets */ | |
fe8bc396 | 478 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 479 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 480 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
481 | * ordinary base packet |
482 | */ | |
8de47de5 SE |
483 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
484 | forw_packet->if_incoming == hard_iface) | |
96412690 | 485 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 486 | else |
96412690 | 487 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 488 | |
c67893d1 SE |
489 | if (packet_num > 0 || !forw_packet->own) |
490 | fwd_str = "Forwarding"; | |
491 | else | |
492 | fwd_str = "Sending own"; | |
493 | ||
39c75a51 | 494 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 495 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 496 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
497 | batadv_ogm_packet->orig, |
498 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 499 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 500 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 501 | "on" : "off"), |
e1bf0c14 | 502 | hard_iface->net_dev->name, |
1eda58bf | 503 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 504 | |
7e071c79 | 505 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 506 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 507 | packet_num++; |
c67893d1 SE |
508 | packet_pos = forw_packet->skb->data + buff_pos; |
509 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
510 | } |
511 | ||
512 | /* create clone because function is called more than once */ | |
513 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 514 | if (skb) { |
d69909d2 SE |
515 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
516 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 517 | skb->len + ETH_HLEN); |
95d39278 | 518 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 519 | } |
b9dacc52 ML |
520 | } |
521 | ||
522 | /* send a batman ogm packet */ | |
56303d34 | 523 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 524 | { |
b9dacc52 | 525 | struct net_device *soft_iface; |
56303d34 SE |
526 | struct batadv_priv *bat_priv; |
527 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
528 | |
529 | if (!forw_packet->if_incoming) { | |
86ceb360 | 530 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
531 | goto out; |
532 | } | |
533 | ||
534 | soft_iface = forw_packet->if_incoming->soft_iface; | |
535 | bat_priv = netdev_priv(soft_iface); | |
536 | ||
ef0a937f | 537 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
538 | goto out; |
539 | ||
ef0a937f | 540 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
541 | goto out; |
542 | ||
ef0a937f | 543 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 544 | goto out; |
b9dacc52 | 545 | |
ef0a937f SW |
546 | primary_if = batadv_primary_if_get_selected(bat_priv); |
547 | if (!primary_if) | |
548 | goto out; | |
b9dacc52 | 549 | |
ef0a937f SW |
550 | /* only for one specific outgoing interface */ |
551 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
552 | |
553 | out: | |
554 | if (primary_if) | |
82047ad7 | 555 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
556 | } |
557 | ||
ef0a937f SW |
558 | /** |
559 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
560 | * existing forward packet | |
561 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
562 | * @bat_priv: the bat priv with all the soft interface information | |
563 | * @packet_len: (total) length of the OGM | |
564 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 565 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
566 | * @if_incoming: interface where the packet was received |
567 | * @if_outgoing: interface for which the retransmission should be considered | |
568 | * @forw_packet: the forwarded packet which should be checked | |
569 | * | |
62fe710f | 570 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 571 | */ |
fe8bc396 | 572 | static bool |
96412690 | 573 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 574 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
575 | int packet_len, unsigned long send_time, |
576 | bool directlink, | |
56303d34 | 577 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 578 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 579 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 580 | { |
96412690 | 581 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 582 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 583 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 584 | bool res = false; |
42d0b044 | 585 | unsigned long aggregation_end_time; |
b9dacc52 | 586 | |
96412690 | 587 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
588 | aggregation_end_time = send_time; |
589 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 590 | |
9cfc7bd6 | 591 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
592 | * if: |
593 | * | |
594 | * - the send time is within our MAX_AGGREGATION_MS time | |
595 | * - the resulting packet wont be bigger than | |
596 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 597 | * otherwise aggregation is not possible |
b9dacc52 | 598 | */ |
8f34b388 MP |
599 | if (!time_before(send_time, forw_packet->send_time) || |
600 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
601 | return false; | |
602 | ||
603 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
604 | return false; | |
605 | ||
606 | /* packet is not leaving on the same interface. */ | |
607 | if (forw_packet->if_outgoing != if_outgoing) | |
608 | return false; | |
609 | ||
610 | /* check aggregation compatibility | |
611 | * -> direct link packets are broadcasted on | |
612 | * their interface only | |
613 | * -> aggregate packet if the current packet is | |
614 | * a "global" packet as well as the base | |
615 | * packet | |
616 | */ | |
617 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
618 | if (!primary_if) | |
619 | return false; | |
ef0a937f | 620 | |
8f34b388 MP |
621 | /* packets without direct link flag and high TTL |
622 | * are flooded through the net | |
623 | */ | |
624 | if (!directlink && | |
625 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
626 | batadv_ogm_packet->ttl != 1 && | |
627 | ||
628 | /* own packets originating non-primary | |
629 | * interfaces leave only that interface | |
630 | */ | |
631 | (!forw_packet->own || | |
632 | forw_packet->if_incoming == primary_if)) { | |
633 | res = true; | |
634 | goto out; | |
635 | } | |
b9dacc52 | 636 | |
8f34b388 MP |
637 | /* if the incoming packet is sent via this one |
638 | * interface only - we still can aggregate | |
639 | */ | |
640 | if (directlink && | |
641 | new_bat_ogm_packet->ttl == 1 && | |
642 | forw_packet->if_incoming == if_incoming && | |
643 | ||
644 | /* packets from direct neighbors or | |
645 | * own secondary interface packets | |
646 | * (= secondary interface packets in general) | |
647 | */ | |
648 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
649 | (forw_packet->own && | |
650 | forw_packet->if_incoming != primary_if))) { | |
651 | res = true; | |
652 | goto out; | |
b9dacc52 ML |
653 | } |
654 | ||
655 | out: | |
656 | if (primary_if) | |
82047ad7 | 657 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
658 | return res; |
659 | } | |
660 | ||
1b371d13 SW |
661 | /** |
662 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
663 | * packet to it. |
664 | * @packet_buff: pointer to the OGM | |
665 | * @packet_len: (total) length of the OGM | |
666 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
667 | * @direct_link: whether this OGM has direct link status | |
668 | * @if_incoming: interface where the packet was received | |
669 | * @if_outgoing: interface for which the retransmission should be considered | |
670 | * @own_packet: true if it is a self-generated ogm | |
671 | */ | |
fe8bc396 SE |
672 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
673 | int packet_len, unsigned long send_time, | |
674 | bool direct_link, | |
56303d34 | 675 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 676 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 677 | int own_packet) |
b9dacc52 | 678 | { |
56303d34 SE |
679 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
680 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 681 | unsigned char *skb_buff; |
42d0b044 | 682 | unsigned int skb_size; |
b9dacc52 | 683 | |
b9dacc52 ML |
684 | /* own packet should always be scheduled */ |
685 | if (!own_packet) { | |
3e34819e | 686 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 687 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 688 | "batman packet queue full\n"); |
17a86915 | 689 | return; |
b9dacc52 ML |
690 | } |
691 | } | |
692 | ||
693 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
694 | if (!forw_packet_aggr) |
695 | goto out_nomem; | |
b9dacc52 | 696 | |
940d156f MP |
697 | if (atomic_read(&bat_priv->aggregated_ogms) && |
698 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 699 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 700 | else |
5b246574 SE |
701 | skb_size = packet_len; |
702 | ||
41ab6c48 | 703 | skb_size += ETH_HLEN; |
b9dacc52 | 704 | |
41ab6c48 | 705 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
706 | if (!forw_packet_aggr->skb) |
707 | goto out_free_forw_packet; | |
c54f38c9 | 708 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 709 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 710 | |
b9dacc52 ML |
711 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
712 | forw_packet_aggr->packet_len = packet_len; | |
713 | memcpy(skb_buff, packet_buff, packet_len); | |
714 | ||
17a86915 SE |
715 | kref_get(&if_incoming->refcount); |
716 | kref_get(&if_outgoing->refcount); | |
b9dacc52 ML |
717 | forw_packet_aggr->own = own_packet; |
718 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 719 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 720 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 721 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
722 | forw_packet_aggr->send_time = send_time; |
723 | ||
724 | /* save packet direct link flag status */ | |
725 | if (direct_link) | |
726 | forw_packet_aggr->direct_link_flags |= 1; | |
727 | ||
728 | /* add new packet to packet list */ | |
729 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
730 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
731 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
732 | ||
733 | /* start timer for this packet */ | |
734 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 735 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 736 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
737 | &forw_packet_aggr->delayed_work, |
738 | send_time - jiffies); | |
739 | ||
740 | return; | |
940d156f MP |
741 | out_free_forw_packet: |
742 | kfree(forw_packet_aggr); | |
743 | out_nomem: | |
744 | if (!own_packet) | |
745 | atomic_inc(&bat_priv->batman_queue_left); | |
b9dacc52 ML |
746 | } |
747 | ||
748 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 749 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
750 | const unsigned char *packet_buff, |
751 | int packet_len, bool direct_link) | |
b9dacc52 ML |
752 | { |
753 | unsigned char *skb_buff; | |
8de47de5 | 754 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
755 | |
756 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
757 | memcpy(skb_buff, packet_buff, packet_len); | |
758 | forw_packet_aggr->packet_len += packet_len; | |
759 | forw_packet_aggr->num_packets++; | |
760 | ||
761 | /* save packet direct link flag status */ | |
8de47de5 SE |
762 | if (direct_link) { |
763 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
764 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
765 | } | |
b9dacc52 ML |
766 | } |
767 | ||
ef0a937f SW |
768 | /** |
769 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
770 | * @bat_priv: the bat priv with all the soft interface information | |
771 | * @packet_buff: pointer to the OGM | |
772 | * @packet_len: (total) length of the OGM | |
773 | * @if_incoming: interface where the packet was received | |
774 | * @if_outgoing: interface for which the retransmission should be considered | |
775 | * @own_packet: true if it is a self-generated ogm | |
776 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
777 | */ | |
56303d34 | 778 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
779 | unsigned char *packet_buff, |
780 | int packet_len, | |
56303d34 | 781 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 782 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 783 | int own_packet, unsigned long send_time) |
b9dacc52 | 784 | { |
9cfc7bd6 | 785 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
786 | * _pos -> pointer to the position in the queue |
787 | */ | |
56303d34 SE |
788 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
789 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 790 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 791 | bool direct_link; |
42d0b044 | 792 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 793 | |
96412690 | 794 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 795 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 796 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
797 | |
798 | /* find position for the packet in the forward queue */ | |
799 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
800 | /* own packets are not to be aggregated */ | |
56489151 | 801 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 802 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 803 | &bat_priv->forw_bat_list, list) { |
96412690 | 804 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
805 | bat_priv, packet_len, |
806 | send_time, direct_link, | |
807 | if_incoming, | |
ef0a937f | 808 | if_outgoing, |
fe8bc396 | 809 | forw_packet_pos)) { |
b9dacc52 ML |
810 | forw_packet_aggr = forw_packet_pos; |
811 | break; | |
812 | } | |
813 | } | |
814 | } | |
815 | ||
816 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
817 | * suitable aggregation packet found |
818 | */ | |
b9dacc52 ML |
819 | if (!forw_packet_aggr) { |
820 | /* the following section can run without the lock */ | |
821 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
822 | ||
9cfc7bd6 | 823 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
824 | * we hold it back for a while, so that it might be aggregated |
825 | * later on | |
826 | */ | |
42d0b044 SE |
827 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
828 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 829 | |
fe8bc396 SE |
830 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
831 | send_time, direct_link, | |
ef0a937f SW |
832 | if_incoming, if_outgoing, |
833 | own_packet); | |
b9dacc52 | 834 | } else { |
fe8bc396 SE |
835 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
836 | packet_len, direct_link); | |
b9dacc52 ML |
837 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
838 | } | |
839 | } | |
840 | ||
56303d34 | 841 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 842 | const struct ethhdr *ethhdr, |
96412690 | 843 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
844 | bool is_single_hop_neigh, |
845 | bool is_from_best_next_hop, | |
ef0a937f SW |
846 | struct batadv_hard_iface *if_incoming, |
847 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 848 | { |
56303d34 | 849 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 850 | u16 tvlv_len; |
b9dacc52 | 851 | |
a40d9b07 | 852 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 853 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
854 | return; |
855 | } | |
856 | ||
13b2541b ML |
857 | if (!is_from_best_next_hop) { |
858 | /* Mark the forwarded packet when it is not coming from our | |
859 | * best next hop. We still need to forward the packet for our | |
860 | * neighbor link quality detection to work in case the packet | |
861 | * originated from a single hop neighbor. Otherwise we can | |
862 | * simply drop the ogm. | |
863 | */ | |
864 | if (is_single_hop_neigh) | |
96412690 | 865 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
866 | else |
867 | return; | |
868 | } | |
b9dacc52 | 869 | |
ef261577 | 870 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 871 | |
a40d9b07 | 872 | batadv_ogm_packet->ttl--; |
8fdd0153 | 873 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 874 | |
b9dacc52 | 875 | /* apply hop penalty */ |
96412690 | 876 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 877 | bat_priv); |
b9dacc52 | 878 | |
39c75a51 | 879 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 880 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 881 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 882 | |
75cd33f8 | 883 | if (is_single_hop_neigh) |
96412690 | 884 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 885 | else |
96412690 | 886 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 887 | |
96412690 | 888 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 889 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
890 | if_incoming, if_outgoing, 0, |
891 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
892 | } |
893 | ||
d9896617 AQ |
894 | /** |
895 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
896 | * the given interface | |
897 | * @hard_iface: the interface for which the windows have to be shifted | |
898 | */ | |
899 | static void | |
900 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
901 | { | |
902 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
903 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
904 | struct hlist_head *head; | |
905 | struct batadv_orig_node *orig_node; | |
906 | unsigned long *word; | |
6b5e971a | 907 | u32 i; |
d9896617 | 908 | size_t word_index; |
6b5e971a | 909 | u8 *w; |
bbad0a5e | 910 | int if_num; |
d9896617 AQ |
911 | |
912 | for (i = 0; i < hash->size; i++) { | |
913 | head = &hash->table[i]; | |
914 | ||
915 | rcu_read_lock(); | |
916 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 917 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 918 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 919 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
920 | |
921 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
922 | if_num = hard_iface->if_num; |
923 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 924 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 925 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
926 | } |
927 | rcu_read_unlock(); | |
928 | } | |
929 | } | |
930 | ||
56303d34 | 931 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 932 | { |
56303d34 | 933 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 934 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 935 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 936 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 937 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
938 | u32 seqno; |
939 | u16 tvlv_len = 0; | |
ef0a937f | 940 | unsigned long send_time; |
b9dacc52 | 941 | |
e5d89254 | 942 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 943 | |
e1bf0c14 ML |
944 | if (hard_iface == primary_if) { |
945 | /* tt changes have to be committed before the tvlv data is | |
946 | * appended as it may alter the tt tvlv container | |
947 | */ | |
948 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
949 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
950 | ogm_buff_len, | |
951 | BATADV_OGM_HLEN); | |
e1bf0c14 | 952 | } |
be9aa4c1 | 953 | |
14511519 | 954 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 955 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
956 | |
957 | /* change sequence number to network order */ | |
6b5e971a | 958 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 959 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 960 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 961 | |
d9896617 | 962 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 963 | |
ef0a937f SW |
964 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
965 | ||
966 | if (hard_iface != primary_if) { | |
967 | /* OGMs from secondary interfaces are only scheduled on their | |
968 | * respective interfaces. | |
969 | */ | |
970 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
971 | hard_iface, hard_iface, 1, send_time); | |
972 | goto out; | |
973 | } | |
974 | ||
975 | /* OGMs from primary interfaces are scheduled on all | |
976 | * interfaces. | |
977 | */ | |
978 | rcu_read_lock(); | |
979 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
980 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 981 | continue; |
27353446 SE |
982 | |
983 | if (!kref_get_unless_zero(&tmp_hard_iface->refcount)) | |
984 | continue; | |
985 | ||
ef0a937f SW |
986 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
987 | *ogm_buff_len, hard_iface, | |
988 | tmp_hard_iface, 1, send_time); | |
27353446 SE |
989 | |
990 | batadv_hardif_put(tmp_hard_iface); | |
ef0a937f SW |
991 | } |
992 | rcu_read_unlock(); | |
993 | ||
994 | out: | |
b9dacc52 | 995 | if (primary_if) |
82047ad7 | 996 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
997 | } |
998 | ||
89652331 SW |
999 | /** |
1000 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
1001 | * originator | |
1002 | * @bat_priv: the bat priv with all the soft interface information | |
1003 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 1004 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
1005 | * @ethhdr: Ethernet header of the OGM |
1006 | * @batadv_ogm_packet: the ogm packet | |
1007 | * @if_incoming: interface where the packet was received | |
1008 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
1009 | * @dup_status: the duplicate status of this ogm packet. |
1010 | */ | |
fe8bc396 | 1011 | static void |
56303d34 SE |
1012 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
1013 | struct batadv_orig_node *orig_node, | |
7351a482 | 1014 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 1015 | const struct ethhdr *ethhdr, |
96412690 | 1016 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 1017 | struct batadv_hard_iface *if_incoming, |
89652331 | 1018 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 1019 | enum batadv_dup_status dup_status) |
fc957275 | 1020 | { |
89652331 SW |
1021 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
1022 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
1023 | struct batadv_neigh_node *neigh_node = NULL; |
1024 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
1025 | struct batadv_neigh_node *router = NULL; |
1026 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 1027 | int if_num; |
6b5e971a SE |
1028 | u8 sum_orig, sum_neigh; |
1029 | u8 *neigh_addr; | |
1030 | u8 tq_avg; | |
fc957275 | 1031 | |
39c75a51 | 1032 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1033 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
1034 | |
1035 | rcu_read_lock(); | |
b67bfe0d | 1036 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1037 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1038 | neigh_addr = tmp_neigh_node->addr; |
1039 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
1040 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 1041 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 1042 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 1043 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1044 | neigh_node = tmp_neigh_node; |
1045 | continue; | |
1046 | } | |
1047 | ||
7c24bbbe | 1048 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1049 | continue; |
1050 | ||
89652331 SW |
1051 | /* only update the entry for this outgoing interface */ |
1052 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1053 | if_outgoing); | |
1054 | if (!neigh_ifinfo) | |
1055 | continue; | |
1056 | ||
1057 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1058 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1059 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1060 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1061 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1062 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1063 | ||
044fa3ae | 1064 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1065 | neigh_ifinfo = NULL; |
fc957275 ML |
1066 | } |
1067 | ||
1068 | if (!neigh_node) { | |
56303d34 | 1069 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1070 | |
bbad0a5e | 1071 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1072 | if (!orig_tmp) |
1073 | goto unlock; | |
1074 | ||
fe8bc396 SE |
1075 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1076 | ethhdr->h_source, | |
863dd7a8 | 1077 | orig_node, orig_tmp); |
fc957275 | 1078 | |
5d967310 | 1079 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
1080 | if (!neigh_node) |
1081 | goto unlock; | |
23badd6d | 1082 | } else { |
39c75a51 | 1083 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1084 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1085 | } |
fc957275 ML |
1086 | |
1087 | rcu_read_unlock(); | |
89652331 SW |
1088 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1089 | if (!neigh_ifinfo) | |
1090 | goto out; | |
fc957275 | 1091 | |
d7b2a97e | 1092 | neigh_node->last_seen = jiffies; |
fc957275 | 1093 | |
89652331 SW |
1094 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1095 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1096 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1097 | batadv_ogm_packet->tq); |
89652331 SW |
1098 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1099 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1100 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1101 | |
7c24bbbe | 1102 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1103 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1104 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1105 | } |
1106 | ||
fc957275 | 1107 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1108 | * to change |
1109 | */ | |
7351a482 | 1110 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1111 | if (router == neigh_node) |
e1bf0c14 | 1112 | goto out; |
fc957275 | 1113 | |
89652331 SW |
1114 | if (router) { |
1115 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1116 | if (!router_ifinfo) | |
1117 | goto out; | |
1118 | ||
1119 | /* if this neighbor does not offer a better TQ we won't | |
1120 | * consider it | |
1121 | */ | |
1122 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1123 | goto out; | |
1124 | } | |
fc957275 ML |
1125 | |
1126 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1127 | * won't consider it either |
1128 | */ | |
89652331 | 1129 | if (router_ifinfo && |
01b97a3e | 1130 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1131 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1132 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1133 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1134 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1135 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1136 | |
1137 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1138 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1139 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1140 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1141 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1142 | |
bbb1f90e | 1143 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1144 | goto out; |
fc957275 ML |
1145 | } |
1146 | ||
7351a482 | 1147 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1148 | goto out; |
1149 | ||
1150 | unlock: | |
1151 | rcu_read_unlock(); | |
1152 | out: | |
1153 | if (neigh_node) | |
25bb2509 | 1154 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1155 | if (router) |
25bb2509 | 1156 | batadv_neigh_node_put(router); |
89652331 | 1157 | if (neigh_ifinfo) |
044fa3ae | 1158 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1159 | if (router_ifinfo) |
044fa3ae | 1160 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1161 | } |
1162 | ||
89652331 SW |
1163 | /** |
1164 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1165 | * @orig_node: the orig node who originally emitted the ogm packet | |
1166 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1167 | * @batadv_ogm_packet: the ogm packet | |
1168 | * @if_incoming: interface where the packet was received | |
1169 | * @if_outgoing: interface for which the retransmission should be considered | |
1170 | * | |
4b426b10 | 1171 | * Return: true if the link can be considered bidirectional, false otherwise |
89652331 | 1172 | */ |
4b426b10 SE |
1173 | static bool batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1174 | struct batadv_orig_node *orig_neigh_node, | |
1175 | struct batadv_ogm_packet *batadv_ogm_packet, | |
1176 | struct batadv_hard_iface *if_incoming, | |
1177 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1178 | { |
56303d34 SE |
1179 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1180 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1181 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1182 | u8 total_count; |
1183 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1184 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
4b426b10 | 1185 | int tq_asym_penalty, inv_asym_penalty, if_num; |
42d0b044 | 1186 | unsigned int combined_tq; |
c0398768 | 1187 | int tq_iface_penalty; |
4b426b10 | 1188 | bool ret = false; |
fc957275 ML |
1189 | |
1190 | /* find corresponding one hop neighbor */ | |
1191 | rcu_read_lock(); | |
b67bfe0d | 1192 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1193 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1194 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1195 | orig_neigh_node->orig)) | |
fc957275 ML |
1196 | continue; |
1197 | ||
1198 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1199 | continue; | |
1200 | ||
77ae32e8 | 1201 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1202 | continue; |
1203 | ||
1204 | neigh_node = tmp_neigh_node; | |
1205 | break; | |
1206 | } | |
1207 | rcu_read_unlock(); | |
1208 | ||
1209 | if (!neigh_node) | |
fe8bc396 SE |
1210 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1211 | orig_neigh_node->orig, | |
1212 | orig_neigh_node, | |
863dd7a8 | 1213 | orig_neigh_node); |
fc957275 ML |
1214 | |
1215 | if (!neigh_node) | |
1216 | goto out; | |
1217 | ||
d7b2a97e | 1218 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1219 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1220 | neigh_node->last_seen = jiffies; |
fc957275 | 1221 | |
d7b2a97e | 1222 | orig_node->last_seen = jiffies; |
fc957275 ML |
1223 | |
1224 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1225 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1226 | if_num = if_incoming->if_num; | |
1227 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1228 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1229 | if (neigh_ifinfo) { | |
1230 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1231 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1232 | } else { |
1233 | neigh_rq_count = 0; | |
1234 | } | |
bbad0a5e | 1235 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1236 | |
1237 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1238 | if (orig_eq_count > neigh_rq_count) |
1239 | total_count = neigh_rq_count; | |
1240 | else | |
1241 | total_count = orig_eq_count; | |
fc957275 | 1242 | |
9cfc7bd6 SE |
1243 | /* if we have too few packets (too less data) we set tq_own to zero |
1244 | * if we receive too few packets it is not considered bidirectional | |
1245 | */ | |
42d0b044 SE |
1246 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1247 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1248 | tq_own = 0; |
1249 | else | |
1250 | /* neigh_node->real_packet_count is never zero as we | |
1251 | * only purge old information when getting new | |
9cfc7bd6 SE |
1252 | * information |
1253 | */ | |
42d0b044 | 1254 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1255 | |
21a1236b | 1256 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1257 | * affect the nearly-symmetric links only a little, but |
1258 | * punishes asymmetric links more. This will give a value | |
1259 | * between 0 and TQ_MAX_VALUE | |
1260 | */ | |
42d0b044 SE |
1261 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1262 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1263 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1264 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1265 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1266 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1267 | inv_asym_penalty /= neigh_rq_max_cube; | |
1268 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1269 | ||
c0398768 SW |
1270 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1271 | * interfaces and other half duplex devices suffer from throughput | |
1272 | * drops as they can't send and receive at the same time. | |
1273 | */ | |
1274 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1275 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1276 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1277 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1278 | bat_priv); | |
1279 | ||
1280 | combined_tq = batadv_ogm_packet->tq * | |
1281 | tq_own * | |
1282 | tq_asym_penalty * | |
1283 | tq_iface_penalty; | |
1284 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1285 | BATADV_TQ_MAX_VALUE * | |
1286 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1287 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1288 | |
39c75a51 | 1289 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1290 | "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 | 1291 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1292 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1293 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1294 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1295 | |
1296 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1297 | * consider it bidirectional |
1298 | */ | |
96412690 | 1299 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
4b426b10 | 1300 | ret = true; |
fc957275 ML |
1301 | |
1302 | out: | |
1303 | if (neigh_node) | |
25bb2509 | 1304 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1305 | return ret; |
1306 | } | |
1307 | ||
7c24bbbe SW |
1308 | /** |
1309 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1310 | * adjust the sequence number and find out whether it is a duplicate | |
1311 | * @ethhdr: ethernet header of the packet | |
1312 | * @batadv_ogm_packet: OGM packet to be considered | |
1313 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1314 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1315 | * |
62fe710f | 1316 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1317 | */ |
7c24bbbe | 1318 | static enum batadv_dup_status |
fe8bc396 | 1319 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1320 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1321 | const struct batadv_hard_iface *if_incoming, |
1322 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1323 | { |
56303d34 SE |
1324 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1325 | struct batadv_orig_node *orig_node; | |
7351a482 | 1326 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1327 | struct batadv_neigh_node *neigh_node; |
1328 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
4b426b10 | 1329 | bool is_dup; |
6b5e971a | 1330 | s32 seq_diff; |
4b426b10 | 1331 | bool need_update = false; |
7c24bbbe SW |
1332 | int set_mark; |
1333 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1334 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1335 | u8 *neigh_addr; | |
1336 | u8 packet_count; | |
0538f759 | 1337 | unsigned long *bitmap; |
fc957275 | 1338 | |
bbad0a5e | 1339 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1340 | if (!orig_node) |
7c24bbbe | 1341 | return BATADV_NO_DUP; |
fc957275 | 1342 | |
7351a482 SW |
1343 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1344 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1345 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1346 | return 0; |
1347 | } | |
1348 | ||
bbad0a5e | 1349 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1350 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1351 | |
1352 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1353 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1354 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1355 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1356 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1357 | ret = BATADV_PROTECTED; |
fc957275 | 1358 | goto out; |
7c24bbbe | 1359 | } |
fc957275 ML |
1360 | |
1361 | rcu_read_lock(); | |
89652331 SW |
1362 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1363 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1364 | if_outgoing); | |
1365 | if (!neigh_ifinfo) | |
1366 | continue; | |
1367 | ||
1368 | neigh_addr = neigh_node->addr; | |
1369 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1370 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1371 | seqno); |
1372 | ||
1eda58bf | 1373 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1374 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1375 | set_mark = 1; |
7c24bbbe SW |
1376 | if (is_dup) |
1377 | ret = BATADV_NEIGH_DUP; | |
1378 | } else { | |
fc957275 | 1379 | set_mark = 0; |
7c24bbbe SW |
1380 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1381 | ret = BATADV_ORIG_DUP; | |
1382 | } | |
fc957275 ML |
1383 | |
1384 | /* if the window moved, set the update flag. */ | |
89652331 | 1385 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1386 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1387 | seq_diff, set_mark); |
fc957275 | 1388 | |
89652331 | 1389 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1390 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1391 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1392 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1393 | } |
1394 | rcu_read_unlock(); | |
1395 | ||
1396 | if (need_update) { | |
39c75a51 | 1397 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1398 | "%s updating last_seqno: old %u, new %u\n", |
1399 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1400 | orig_ifinfo->last_real_seqno, seqno); | |
1401 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1402 | } |
1403 | ||
fc957275 | 1404 | out: |
bbad0a5e | 1405 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1406 | batadv_orig_node_put(orig_node); |
35f94779 | 1407 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1408 | return ret; |
1409 | } | |
1410 | ||
7351a482 SW |
1411 | /** |
1412 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1413 | * @skb: the skb containing the OGM | |
95298a91 | 1414 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1415 | * @orig_node: the (cached) orig node for the originator of this OGM |
1416 | * @if_incoming: the interface where this packet was received | |
1417 | * @if_outgoing: the interface for which the packet should be considered | |
1418 | */ | |
1419 | static void | |
1420 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1421 | struct batadv_orig_node *orig_node, | |
1422 | struct batadv_hard_iface *if_incoming, | |
1423 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1424 | { |
56303d34 | 1425 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1426 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1427 | struct batadv_neigh_node *router = NULL; |
1428 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1429 | struct batadv_orig_node *orig_neigh_node; |
1430 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1431 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1432 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1433 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1434 | enum batadv_dup_status dup_status; |
7351a482 SW |
1435 | bool is_from_best_next_hop = false; |
1436 | bool is_single_hop_neigh = false; | |
1437 | bool sameseq, similar_ttl; | |
1438 | struct sk_buff *skb_priv; | |
1439 | struct ethhdr *ethhdr; | |
6b5e971a | 1440 | u8 *prev_sender; |
4b426b10 | 1441 | bool is_bidirect; |
fc957275 | 1442 | |
7351a482 SW |
1443 | /* create a private copy of the skb, as some functions change tq value |
1444 | * and/or flags. | |
fc957275 | 1445 | */ |
7351a482 SW |
1446 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1447 | if (!skb_priv) | |
fc957275 ML |
1448 | return; |
1449 | ||
7351a482 SW |
1450 | ethhdr = eth_hdr(skb_priv); |
1451 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1452 | |
7351a482 SW |
1453 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1454 | if_incoming, if_outgoing); | |
1455 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1456 | is_single_hop_neigh = true; |
fc957275 | 1457 | |
7c24bbbe | 1458 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1459 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1460 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1461 | ethhdr->h_source); | |
fc957275 ML |
1462 | goto out; |
1463 | } | |
1464 | ||
7351a482 | 1465 | if (ogm_packet->tq == 0) { |
39c75a51 | 1466 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1467 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1468 | goto out; |
1469 | } | |
1470 | ||
4ff1e2a7 ML |
1471 | if (is_single_hop_neigh) { |
1472 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1473 | ethhdr->h_source); | |
1474 | if (hardif_neigh) | |
1475 | hardif_neigh->last_seen = jiffies; | |
1476 | } | |
1477 | ||
7351a482 | 1478 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1479 | if (router) { |
7351a482 SW |
1480 | router_router = batadv_orig_router_get(router->orig_node, |
1481 | if_outgoing); | |
1482 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1483 | } |
fc957275 | 1484 | |
7351a482 | 1485 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1486 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1487 | is_from_best_next_hop = true; |
1488 | ||
7351a482 | 1489 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1490 | /* avoid temporary routing loops */ |
1491 | if (router && router_router && | |
1eda58bf | 1492 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1493 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1494 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1495 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1496 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1497 | ethhdr->h_source); | |
fc957275 ML |
1498 | goto out; |
1499 | } | |
1500 | ||
7351a482 SW |
1501 | if (if_outgoing == BATADV_IF_DEFAULT) |
1502 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1503 | |
fc957275 | 1504 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1505 | * originator mac |
1506 | */ | |
c67893d1 SE |
1507 | if (is_single_hop_neigh) |
1508 | orig_neigh_node = orig_node; | |
1509 | else | |
bbad0a5e AQ |
1510 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1511 | ethhdr->h_source); | |
c67893d1 | 1512 | |
fc957275 ML |
1513 | if (!orig_neigh_node) |
1514 | goto out; | |
1515 | ||
d56b1705 MH |
1516 | /* Update nc_nodes of the originator */ |
1517 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1518 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1519 | |
7351a482 SW |
1520 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1521 | if_outgoing); | |
fc957275 ML |
1522 | |
1523 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1524 | * don't route towards it |
1525 | */ | |
fc957275 | 1526 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1527 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1528 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1529 | goto out_neigh; |
1530 | } | |
1531 | ||
fe8bc396 | 1532 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1533 | ogm_packet, if_incoming, |
1534 | if_outgoing); | |
fc957275 | 1535 | |
fc957275 | 1536 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1537 | * seqno and similar ttl as the non-duplicate |
1538 | */ | |
7351a482 SW |
1539 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1540 | if (!orig_ifinfo) | |
1541 | goto out_neigh; | |
1542 | ||
1543 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1544 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1545 | ||
7c24bbbe | 1546 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1547 | (sameseq && similar_ttl))) { |
1548 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1549 | orig_ifinfo, ethhdr, | |
1550 | ogm_packet, if_incoming, | |
1551 | if_outgoing, dup_status); | |
1552 | } | |
35f94779 | 1553 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1554 | |
ef0a937f SW |
1555 | /* only forward for specific interface, not for the default one. */ |
1556 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1557 | goto out_neigh; | |
1558 | ||
fc957275 ML |
1559 | /* is single hop (direct) neighbor */ |
1560 | if (is_single_hop_neigh) { | |
7351a482 SW |
1561 | /* OGMs from secondary interfaces should only scheduled once |
1562 | * per interface where it has been received, not multiple times | |
1563 | */ | |
1564 | if ((ogm_packet->ttl <= 2) && | |
1565 | (if_incoming != if_outgoing)) { | |
1566 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1567 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1568 | goto out_neigh; | |
1569 | } | |
fc957275 | 1570 | /* mark direct link on incoming interface */ |
7351a482 | 1571 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1572 | is_single_hop_neigh, |
ef0a937f SW |
1573 | is_from_best_next_hop, if_incoming, |
1574 | if_outgoing); | |
fc957275 | 1575 | |
39c75a51 | 1576 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1577 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1578 | goto out_neigh; |
1579 | } | |
1580 | ||
1581 | /* multihop originator */ | |
fe8bc396 | 1582 | if (!is_bidirect) { |
39c75a51 | 1583 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1584 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1585 | goto out_neigh; |
1586 | } | |
1587 | ||
7c24bbbe | 1588 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1589 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1590 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1591 | goto out_neigh; |
1592 | } | |
1593 | ||
39c75a51 | 1594 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1595 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1596 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1597 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1598 | if_incoming, if_outgoing); |
fc957275 ML |
1599 | |
1600 | out_neigh: | |
1601 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
5d967310 | 1602 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1603 | out: |
c1e517fb | 1604 | if (router_ifinfo) |
044fa3ae | 1605 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1606 | if (router) |
25bb2509 | 1607 | batadv_neigh_node_put(router); |
fc957275 | 1608 | if (router_router) |
25bb2509 | 1609 | batadv_neigh_node_put(router_router); |
fc957275 | 1610 | if (orig_neigh_router) |
25bb2509 | 1611 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1612 | if (hardif_neigh) |
accadc35 | 1613 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1614 | |
7351a482 SW |
1615 | kfree_skb(skb_priv); |
1616 | } | |
1617 | ||
1618 | /** | |
1619 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1620 | * @skb: the skb containing the OGM | |
1621 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1622 | * @if_incoming: the interface where this packet was receved | |
1623 | */ | |
1624 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1625 | struct batadv_hard_iface *if_incoming) | |
1626 | { | |
1627 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1628 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1629 | struct batadv_hard_iface *hard_iface; | |
1630 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1631 | u32 if_incoming_seqno; |
7351a482 SW |
1632 | bool has_directlink_flag; |
1633 | struct ethhdr *ethhdr; | |
1634 | bool is_my_oldorig = false; | |
1635 | bool is_my_addr = false; | |
1636 | bool is_my_orig = false; | |
1637 | ||
1638 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1639 | ethhdr = eth_hdr(skb); | |
1640 | ||
1641 | /* Silently drop when the batman packet is actually not a | |
1642 | * correct packet. | |
1643 | * | |
1644 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1645 | * minimum frame length of 64 byte) and the aggregation interprets | |
1646 | * it as an additional length. | |
1647 | * | |
1648 | * TODO: A more sane solution would be to have a bit in the | |
1649 | * batadv_ogm_packet to detect whether the packet is the last | |
1650 | * packet in an aggregation. Here we expect that the padding | |
1651 | * is always zero (or not 0x01) | |
1652 | */ | |
1653 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1654 | return; | |
1655 | ||
1656 | /* could be changed by schedule_own_packet() */ | |
1657 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1658 | ||
1659 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1660 | has_directlink_flag = true; | |
1661 | else | |
1662 | has_directlink_flag = false; | |
1663 | ||
1664 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1665 | "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", | |
1666 | ethhdr->h_source, if_incoming->net_dev->name, | |
1667 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1668 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1669 | ogm_packet->tq, ogm_packet->ttl, | |
1670 | ogm_packet->version, has_directlink_flag); | |
1671 | ||
1672 | rcu_read_lock(); | |
1673 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1674 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1675 | continue; | |
1676 | ||
1677 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1678 | continue; | |
1679 | ||
1680 | if (batadv_compare_eth(ethhdr->h_source, | |
1681 | hard_iface->net_dev->dev_addr)) | |
1682 | is_my_addr = true; | |
1683 | ||
1684 | if (batadv_compare_eth(ogm_packet->orig, | |
1685 | hard_iface->net_dev->dev_addr)) | |
1686 | is_my_orig = true; | |
1687 | ||
1688 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1689 | hard_iface->net_dev->dev_addr)) | |
1690 | is_my_oldorig = true; | |
1691 | } | |
1692 | rcu_read_unlock(); | |
1693 | ||
1694 | if (is_my_addr) { | |
1695 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1696 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1697 | ethhdr->h_source); | |
1698 | return; | |
1699 | } | |
1700 | ||
1701 | if (is_my_orig) { | |
1702 | unsigned long *word; | |
1703 | int offset; | |
6b5e971a SE |
1704 | s32 bit_pos; |
1705 | s16 if_num; | |
1706 | u8 *weight; | |
7351a482 SW |
1707 | |
1708 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1709 | ethhdr->h_source); | |
1710 | if (!orig_neigh_node) | |
1711 | return; | |
1712 | ||
1713 | /* neighbor has to indicate direct link and it has to | |
1714 | * come via the corresponding interface | |
1715 | * save packet seqno for bidirectional check | |
1716 | */ | |
1717 | if (has_directlink_flag && | |
1718 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1719 | ogm_packet->orig)) { | |
1720 | if_num = if_incoming->if_num; | |
1721 | offset = if_num * BATADV_NUM_WORDS; | |
1722 | ||
1723 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1724 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1725 | bit_pos = if_incoming_seqno - 2; |
1726 | bit_pos -= ntohl(ogm_packet->seqno); | |
1727 | batadv_set_bit(word, bit_pos); | |
1728 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1729 | *weight = bitmap_weight(word, | |
1730 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1731 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1732 | } | |
1733 | ||
1734 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1735 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1736 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1737 | return; |
1738 | } | |
1739 | ||
1740 | if (is_my_oldorig) { | |
1741 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1742 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1743 | ethhdr->h_source); | |
1744 | return; | |
1745 | } | |
1746 | ||
1747 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1748 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1749 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1750 | ethhdr->h_source); | |
1751 | return; | |
1752 | } | |
1753 | ||
1754 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1755 | if (!orig_node) | |
1756 | return; | |
1757 | ||
1758 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1759 | if_incoming, BATADV_IF_DEFAULT); | |
1760 | ||
1761 | rcu_read_lock(); | |
1762 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1763 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1764 | continue; | |
1765 | ||
1766 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1767 | continue; | |
1768 | ||
27353446 SE |
1769 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
1770 | continue; | |
1771 | ||
7351a482 SW |
1772 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, |
1773 | if_incoming, hard_iface); | |
27353446 SE |
1774 | |
1775 | batadv_hardif_put(hard_iface); | |
7351a482 SW |
1776 | } |
1777 | rcu_read_unlock(); | |
1778 | ||
5d967310 | 1779 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1780 | } |
1781 | ||
fe8bc396 | 1782 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1783 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1784 | { |
56303d34 | 1785 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1786 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1787 | u8 *packet_pos; |
7351a482 | 1788 | int ogm_offset; |
ef261577 | 1789 | bool ret; |
c3e29312 | 1790 | |
7e071c79 | 1791 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1792 | if (!ret) |
1793 | return NET_RX_DROP; | |
fc957275 | 1794 | |
edbf12ba ML |
1795 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1796 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1797 | */ | |
fe8bc396 | 1798 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1799 | return NET_RX_DROP; |
1800 | ||
d69909d2 SE |
1801 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1802 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1803 | skb->len + ETH_HLEN); |
1804 | ||
7351a482 SW |
1805 | ogm_offset = 0; |
1806 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1807 | |
1808 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1809 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1810 | ogm_packet->tvlv_len)) { | |
1811 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1812 | |
7351a482 SW |
1813 | ogm_offset += BATADV_OGM_HLEN; |
1814 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1815 | |
7351a482 SW |
1816 | packet_pos = skb->data + ogm_offset; |
1817 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1818 | } |
c3e29312 ML |
1819 | |
1820 | kfree_skb(skb); | |
1821 | return NET_RX_SUCCESS; | |
fc957275 | 1822 | } |
1c280471 | 1823 | |
1b371d13 SW |
1824 | /** |
1825 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1826 | * @orig_node: the orig_node for which the neighbors are printed |
1827 | * @if_outgoing: outgoing interface for these entries | |
1828 | * @seq: debugfs table seq_file struct | |
1829 | * | |
1830 | * Must be called while holding an rcu lock. | |
1831 | */ | |
1832 | static void | |
1833 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1834 | struct batadv_hard_iface *if_outgoing, | |
1835 | struct seq_file *seq) | |
1836 | { | |
1837 | struct batadv_neigh_node *neigh_node; | |
1838 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1839 | ||
1840 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1841 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1842 | if (!n_ifinfo) | |
1843 | continue; | |
1844 | ||
1845 | seq_printf(seq, " %pM (%3i)", | |
1846 | neigh_node->addr, | |
1847 | n_ifinfo->bat_iv.tq_avg); | |
1848 | ||
044fa3ae | 1849 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1850 | } |
1851 | } | |
1852 | ||
737a2a22 AQ |
1853 | /** |
1854 | * batadv_iv_ogm_orig_print - print the originator table | |
1855 | * @bat_priv: the bat priv with all the soft interface information | |
1856 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1857 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1858 | */ |
1859 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1860 | struct seq_file *seq, |
1861 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1862 | { |
89652331 | 1863 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1864 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1865 | int last_seen_msecs, last_seen_secs; | |
1866 | struct batadv_orig_node *orig_node; | |
89652331 | 1867 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1868 | unsigned long last_seen_jiffies; |
1869 | struct hlist_head *head; | |
1870 | int batman_count = 0; | |
6b5e971a | 1871 | u32 i; |
737a2a22 | 1872 | |
925a6f37 AQ |
1873 | seq_puts(seq, |
1874 | " Originator last-seen (#/255) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
737a2a22 AQ |
1875 | |
1876 | for (i = 0; i < hash->size; i++) { | |
1877 | head = &hash->table[i]; | |
1878 | ||
1879 | rcu_read_lock(); | |
1880 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1881 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1882 | if_outgoing); |
737a2a22 AQ |
1883 | if (!neigh_node) |
1884 | continue; | |
1885 | ||
89652331 | 1886 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1887 | if_outgoing); |
89652331 SW |
1888 | if (!n_ifinfo) |
1889 | goto next; | |
1890 | ||
1891 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1892 | goto next; |
1893 | ||
1894 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1895 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1896 | last_seen_secs = last_seen_msecs / 1000; | |
1897 | last_seen_msecs = last_seen_msecs % 1000; | |
1898 | ||
1899 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1900 | orig_node->orig, last_seen_secs, | |
89652331 | 1901 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1902 | neigh_node->addr, |
1903 | neigh_node->if_incoming->net_dev->name); | |
1904 | ||
cb1c92ec SW |
1905 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1906 | seq); | |
737a2a22 AQ |
1907 | seq_puts(seq, "\n"); |
1908 | batman_count++; | |
1909 | ||
1910 | next: | |
25bb2509 | 1911 | batadv_neigh_node_put(neigh_node); |
89652331 | 1912 | if (n_ifinfo) |
044fa3ae | 1913 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1914 | } |
1915 | rcu_read_unlock(); | |
1916 | } | |
1917 | ||
1918 | if (batman_count == 0) | |
1919 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1920 | } | |
1921 | ||
7587405a ML |
1922 | /** |
1923 | * batadv_iv_hardif_neigh_print - print a single hop neighbour node | |
1924 | * @seq: neighbour table seq_file struct | |
1925 | * @hardif_neigh: hardif neighbour information | |
1926 | */ | |
1927 | static void | |
1928 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
1929 | struct batadv_hardif_neigh_node *hardif_neigh) | |
1930 | { | |
1931 | int last_secs, last_msecs; | |
1932 | ||
1933 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
1934 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
1935 | ||
1936 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
1937 | hardif_neigh->if_incoming->net_dev->name, | |
1938 | hardif_neigh->addr, last_secs, last_msecs); | |
1939 | } | |
1940 | ||
1941 | /** | |
1942 | * batadv_iv_ogm_neigh_print - print the single hop neighbour list | |
1943 | * @bat_priv: the bat priv with all the soft interface information | |
1944 | * @seq: neighbour table seq_file struct | |
1945 | */ | |
1946 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
1947 | struct seq_file *seq) | |
1948 | { | |
1949 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1950 | struct batadv_hardif_neigh_node *hardif_neigh; | |
1951 | struct batadv_hard_iface *hard_iface; | |
1952 | int batman_count = 0; | |
1953 | ||
925a6f37 | 1954 | seq_puts(seq, " IF Neighbor last-seen\n"); |
7587405a ML |
1955 | |
1956 | rcu_read_lock(); | |
1957 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1958 | if (hard_iface->soft_iface != net_dev) | |
1959 | continue; | |
1960 | ||
1961 | hlist_for_each_entry_rcu(hardif_neigh, | |
1962 | &hard_iface->neigh_list, list) { | |
1963 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
1964 | batman_count++; | |
1965 | } | |
1966 | } | |
1967 | rcu_read_unlock(); | |
1968 | ||
1969 | if (batman_count == 0) | |
1970 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1971 | } | |
1972 | ||
a3285a8f AQ |
1973 | /** |
1974 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
1975 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 1976 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 1977 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1978 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f | 1979 | * |
62fe710f | 1980 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is |
a3285a8f AQ |
1981 | * lower, the same as or higher than the metric via neigh2 |
1982 | */ | |
1983 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
1984 | struct batadv_hard_iface *if_outgoing1, |
1985 | struct batadv_neigh_node *neigh2, | |
1986 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 1987 | { |
89652331 | 1988 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 1989 | u8 tq1, tq2; |
89652331 SW |
1990 | int diff; |
1991 | ||
1992 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
1993 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 1994 | |
89652331 SW |
1995 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
1996 | diff = 0; | |
1997 | goto out; | |
1998 | } | |
a3285a8f | 1999 | |
89652331 SW |
2000 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
2001 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
2002 | diff = tq1 - tq2; | |
2003 | ||
2004 | out: | |
2005 | if (neigh1_ifinfo) | |
044fa3ae | 2006 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2007 | if (neigh2_ifinfo) |
044fa3ae | 2008 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
2009 | |
2010 | return diff; | |
a3285a8f AQ |
2011 | } |
2012 | ||
c43c981e | 2013 | /** |
18165f6f SW |
2014 | * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better |
2015 | * than neigh2 from the metric prospective | |
c43c981e | 2016 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 2017 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 2018 | * @neigh2: the second neighbor object of the comparison |
89652331 | 2019 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 2020 | * |
62fe710f | 2021 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 2022 | * the metric via neigh2, false otherwise. |
c43c981e | 2023 | */ |
89652331 | 2024 | static bool |
18165f6f | 2025 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
2026 | struct batadv_hard_iface *if_outgoing1, |
2027 | struct batadv_neigh_node *neigh2, | |
2028 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 2029 | { |
89652331 | 2030 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 2031 | u8 tq1, tq2; |
89652331 | 2032 | bool ret; |
c43c981e | 2033 | |
89652331 SW |
2034 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
2035 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
2036 | ||
2037 | /* we can't say that the metric is better */ | |
2038 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
2039 | ret = false; | |
2040 | goto out; | |
2041 | } | |
2042 | ||
2043 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
2044 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
2045 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
2046 | ||
2047 | out: | |
2048 | if (neigh1_ifinfo) | |
044fa3ae | 2049 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2050 | if (neigh2_ifinfo) |
044fa3ae | 2051 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
2052 | |
2053 | return ret; | |
c43c981e AQ |
2054 | } |
2055 | ||
56303d34 | 2056 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2057 | .name = "BATMAN_IV", |
fe8bc396 SE |
2058 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
2059 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
2060 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
2061 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
2062 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
2063 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
a3285a8f | 2064 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
18165f6f | 2065 | .bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob, |
7587405a | 2066 | .bat_neigh_print = batadv_iv_neigh_print, |
737a2a22 | 2067 | .bat_orig_print = batadv_iv_ogm_orig_print, |
d0015fdd AQ |
2068 | .bat_orig_free = batadv_iv_ogm_orig_free, |
2069 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, | |
2070 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, | |
1c280471 ML |
2071 | }; |
2072 | ||
81c524f7 | 2073 | int __init batadv_iv_init(void) |
1c280471 | 2074 | { |
c3e29312 ML |
2075 | int ret; |
2076 | ||
2077 | /* batman originator packet */ | |
acd34afa SE |
2078 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2079 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2080 | if (ret < 0) |
2081 | goto out; | |
2082 | ||
fe8bc396 | 2083 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2084 | if (ret < 0) |
2085 | goto handler_unregister; | |
2086 | ||
2087 | goto out; | |
2088 | ||
2089 | handler_unregister: | |
acd34afa | 2090 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2091 | out: |
2092 | return ret; | |
1c280471 | 2093 | } |